Merge branch 'master' of github.com:grpc/grpc into backoff_cpp

700 files changed, 27651 insertions, 25049 deletions

diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 094e43e470..cb322814fe 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -4,3 +4,4 @@
 /**/OWNERS @markdroth @nicolasnoble @ctiller
 /bazel/** @nicolasnoble @dgquintas @ctiller
 /src/core/ext/filters/client_channel/** @markdroth @dgquintas @ctiller
+/tools/run_tests/performance/** @ncteisen @matt-kwong @ctiller
diff --git a/BUILD b/BUILD
index 13843195ea..dba6592f17 100644
--- a/BUILD
+++ b/BUILD
@@ -44,11 +44,11 @@ config_setting(
 )
 
 # This should be updated along with build.yaml
-g_stands_for = "generous"
+g_stands_for = "glossy"
 
 core_version = "5.0.0-dev"
 
-version = "1.8.0-dev"
+version = "1.9.0-dev"
 
 GPR_PUBLIC_HDRS = [
     "include/grpc/support/alloc.h",
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7af707ef53..433326df74 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -358,12 +358,12 @@ add_custom_target(plugins
 add_custom_target(tools_c
   DEPENDS
   check_epollexclusive
-  gen_hpack_tables
-  gen_legal_metadata_characters
-  gen_percent_encoding_tables
   grpc_create_jwt
   grpc_print_google_default_creds_token
   grpc_verify_jwt
+  gen_hpack_tables
+  gen_legal_metadata_characters
+  gen_percent_encoding_tables
 )
 
 add_custom_target(tools_cxx
@@ -5992,104 +5992,6 @@ target_link_libraries(fling_test
 
 endif()
 endif (gRPC_BUILD_TESTS)
-
-add_executable(gen_hpack_tables
-  tools/codegen/core/gen_hpack_tables.c
-)
-
-
-target_include_directories(gen_hpack_tables
-  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
-  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
-  PRIVATE ${BORINGSSL_ROOT_DIR}/include
-  PRIVATE ${PROTOBUF_ROOT_DIR}/src
-  PRIVATE ${BENCHMARK_ROOT_DIR}/include
-  PRIVATE ${ZLIB_ROOT_DIR}
-  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
-  PRIVATE ${CARES_INCLUDE_DIR}
-  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
-  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
-)
-
-target_link_libraries(gen_hpack_tables
-  ${_gRPC_ALLTARGETS_LIBRARIES}
-  gpr
-  grpc
-)
-
-
-if (gRPC_INSTALL)
-  install(TARGETS gen_hpack_tables EXPORT gRPCTargets
-    RUNTIME DESTINATION ${gRPC_INSTALL_BINDIR}
-    LIBRARY DESTINATION ${gRPC_INSTALL_LIBDIR}
-    ARCHIVE DESTINATION ${gRPC_INSTALL_LIBDIR}
-  )
-endif()
-
-
-add_executable(gen_legal_metadata_characters
-  tools/codegen/core/gen_legal_metadata_characters.c
-)
-
-
-target_include_directories(gen_legal_metadata_characters
-  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
-  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
-  PRIVATE ${BORINGSSL_ROOT_DIR}/include
-  PRIVATE ${PROTOBUF_ROOT_DIR}/src
-  PRIVATE ${BENCHMARK_ROOT_DIR}/include
-  PRIVATE ${ZLIB_ROOT_DIR}
-  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
-  PRIVATE ${CARES_INCLUDE_DIR}
-  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
-  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
-)
-
-target_link_libraries(gen_legal_metadata_characters
-  ${_gRPC_ALLTARGETS_LIBRARIES}
-)
-
-
-if (gRPC_INSTALL)
-  install(TARGETS gen_legal_metadata_characters EXPORT gRPCTargets
-    RUNTIME DESTINATION ${gRPC_INSTALL_BINDIR}
-    LIBRARY DESTINATION ${gRPC_INSTALL_LIBDIR}
-    ARCHIVE DESTINATION ${gRPC_INSTALL_LIBDIR}
-  )
-endif()
-
-
-add_executable(gen_percent_encoding_tables
-  tools/codegen/core/gen_percent_encoding_tables.c
-)
-
-
-target_include_directories(gen_percent_encoding_tables
-  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
-  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
-  PRIVATE ${BORINGSSL_ROOT_DIR}/include
-  PRIVATE ${PROTOBUF_ROOT_DIR}/src
-  PRIVATE ${BENCHMARK_ROOT_DIR}/include
-  PRIVATE ${ZLIB_ROOT_DIR}
-  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
-  PRIVATE ${CARES_INCLUDE_DIR}
-  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
-  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
-)
-
-target_link_libraries(gen_percent_encoding_tables
-  ${_gRPC_ALLTARGETS_LIBRARIES}
-)
-
-
-if (gRPC_INSTALL)
-  install(TARGETS gen_percent_encoding_tables EXPORT gRPCTargets
-    RUNTIME DESTINATION ${gRPC_INSTALL_BINDIR}
-    LIBRARY DESTINATION ${gRPC_INSTALL_LIBDIR}
-    ARCHIVE DESTINATION ${gRPC_INSTALL_LIBDIR}
-  )
-endif()
-
 if (gRPC_BUILD_TESTS)
 if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
 
@@ -12917,6 +12819,104 @@ target_link_libraries(public_headers_must_be_c89
 )
 
 endif (gRPC_BUILD_TESTS)
+
+add_executable(gen_hpack_tables
+  tools/codegen/core/gen_hpack_tables.cc
+)
+
+
+target_include_directories(gen_hpack_tables
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
+  PRIVATE ${BORINGSSL_ROOT_DIR}/include
+  PRIVATE ${PROTOBUF_ROOT_DIR}/src
+  PRIVATE ${BENCHMARK_ROOT_DIR}/include
+  PRIVATE ${ZLIB_ROOT_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
+)
+
+target_link_libraries(gen_hpack_tables
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+  gpr
+  grpc
+)
+
+
+if (gRPC_INSTALL)
+  install(TARGETS gen_hpack_tables EXPORT gRPCTargets
+    RUNTIME DESTINATION ${gRPC_INSTALL_BINDIR}
+    LIBRARY DESTINATION ${gRPC_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${gRPC_INSTALL_LIBDIR}
+  )
+endif()
+
+
+add_executable(gen_legal_metadata_characters
+  tools/codegen/core/gen_legal_metadata_characters.cc
+)
+
+
+target_include_directories(gen_legal_metadata_characters
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
+  PRIVATE ${BORINGSSL_ROOT_DIR}/include
+  PRIVATE ${PROTOBUF_ROOT_DIR}/src
+  PRIVATE ${BENCHMARK_ROOT_DIR}/include
+  PRIVATE ${ZLIB_ROOT_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
+)
+
+target_link_libraries(gen_legal_metadata_characters
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+)
+
+
+if (gRPC_INSTALL)
+  install(TARGETS gen_legal_metadata_characters EXPORT gRPCTargets
+    RUNTIME DESTINATION ${gRPC_INSTALL_BINDIR}
+    LIBRARY DESTINATION ${gRPC_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${gRPC_INSTALL_LIBDIR}
+  )
+endif()
+
+
+add_executable(gen_percent_encoding_tables
+  tools/codegen/core/gen_percent_encoding_tables.cc
+)
+
+
+target_include_directories(gen_percent_encoding_tables
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
+  PRIVATE ${BORINGSSL_ROOT_DIR}/include
+  PRIVATE ${PROTOBUF_ROOT_DIR}/src
+  PRIVATE ${BENCHMARK_ROOT_DIR}/include
+  PRIVATE ${ZLIB_ROOT_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
+)
+
+target_link_libraries(gen_percent_encoding_tables
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+)
+
+
+if (gRPC_INSTALL)
+  install(TARGETS gen_percent_encoding_tables EXPORT gRPCTargets
+    RUNTIME DESTINATION ${gRPC_INSTALL_BINDIR}
+    LIBRARY DESTINATION ${gRPC_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${gRPC_INSTALL_LIBDIR}
+  )
+endif()
+
 if (gRPC_BUILD_TESTS)
 
 add_executable(badreq_bad_client_test
diff --git a/Makefile b/Makefile
index ea484f23f2..faf12bc088 100644
--- a/Makefile
+++ b/Makefile
@@ -979,9 +979,6 @@ fling_client: $(BINDIR)/$(CONFIG)/fling_client
 fling_server: $(BINDIR)/$(CONFIG)/fling_server
 fling_stream_test: $(BINDIR)/$(CONFIG)/fling_stream_test
 fling_test: $(BINDIR)/$(CONFIG)/fling_test
-gen_hpack_tables: $(BINDIR)/$(CONFIG)/gen_hpack_tables
-gen_legal_metadata_characters: $(BINDIR)/$(CONFIG)/gen_legal_metadata_characters
-gen_percent_encoding_tables: $(BINDIR)/$(CONFIG)/gen_percent_encoding_tables
 goaway_server_test: $(BINDIR)/$(CONFIG)/goaway_server_test
 gpr_avl_test: $(BINDIR)/$(CONFIG)/gpr_avl_test
 gpr_cmdline_test: $(BINDIR)/$(CONFIG)/gpr_cmdline_test
@@ -1185,6 +1182,9 @@ thread_stress_test: $(BINDIR)/$(CONFIG)/thread_stress_test
 transport_pid_controller_test: $(BINDIR)/$(CONFIG)/transport_pid_controller_test
 writes_per_rpc_test: $(BINDIR)/$(CONFIG)/writes_per_rpc_test
 public_headers_must_be_c89: $(BINDIR)/$(CONFIG)/public_headers_must_be_c89
+gen_hpack_tables: $(BINDIR)/$(CONFIG)/gen_hpack_tables
+gen_legal_metadata_characters: $(BINDIR)/$(CONFIG)/gen_legal_metadata_characters
+gen_percent_encoding_tables: $(BINDIR)/$(CONFIG)/gen_percent_encoding_tables
 boringssl_aes_test: $(BINDIR)/$(CONFIG)/boringssl_aes_test
 boringssl_asn1_test: $(BINDIR)/$(CONFIG)/boringssl_asn1_test
 boringssl_base64_test: $(BINDIR)/$(CONFIG)/boringssl_base64_test
@@ -2188,7 +2188,7 @@ test_python: static_c
 tools: tools_c tools_cxx
 
 
-tools_c: privatelibs_c $(BINDIR)/$(CONFIG)/check_epollexclusive $(BINDIR)/$(CONFIG)/gen_hpack_tables $(BINDIR)/$(CONFIG)/gen_legal_metadata_characters $(BINDIR)/$(CONFIG)/gen_percent_encoding_tables $(BINDIR)/$(CONFIG)/grpc_create_jwt $(BINDIR)/$(CONFIG)/grpc_print_google_default_creds_token $(BINDIR)/$(CONFIG)/grpc_verify_jwt
+tools_c: privatelibs_c $(BINDIR)/$(CONFIG)/check_epollexclusive $(BINDIR)/$(CONFIG)/grpc_create_jwt $(BINDIR)/$(CONFIG)/grpc_print_google_default_creds_token $(BINDIR)/$(CONFIG)/grpc_verify_jwt $(BINDIR)/$(CONFIG)/gen_hpack_tables $(BINDIR)/$(CONFIG)/gen_legal_metadata_characters $(BINDIR)/$(CONFIG)/gen_percent_encoding_tables
 
 tools_cxx: privatelibs_cxx
 
@@ -9812,102 +9812,6 @@ endif
 endif
 
 
-GEN_HPACK_TABLES_SRC = \
-    tools/codegen/core/gen_hpack_tables.c \
-
-GEN_HPACK_TABLES_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(GEN_HPACK_TABLES_SRC))))
-ifeq ($(NO_SECURE),true)
-
-# You can't build secure targets if you don't have OpenSSL.
-
-$(BINDIR)/$(CONFIG)/gen_hpack_tables: openssl_dep_error
-
-else
-
-
-
-$(BINDIR)/$(CONFIG)/gen_hpack_tables: $(GEN_HPACK_TABLES_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(GEN_HPACK_TABLES_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/gen_hpack_tables
-
-endif
-
-$(OBJDIR)/$(CONFIG)/tools/codegen/core/gen_hpack_tables.o:  $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc.a
-
-deps_gen_hpack_tables: $(GEN_HPACK_TABLES_OBJS:.o=.dep)
-
-ifneq ($(NO_SECURE),true)
-ifneq ($(NO_DEPS),true)
--include $(GEN_HPACK_TABLES_OBJS:.o=.dep)
-endif
-endif
-
-
-GEN_LEGAL_METADATA_CHARACTERS_SRC = \
-    tools/codegen/core/gen_legal_metadata_characters.c \
-
-GEN_LEGAL_METADATA_CHARACTERS_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(GEN_LEGAL_METADATA_CHARACTERS_SRC))))
-ifeq ($(NO_SECURE),true)
-
-# You can't build secure targets if you don't have OpenSSL.
-
-$(BINDIR)/$(CONFIG)/gen_legal_metadata_characters: openssl_dep_error
-
-else
-
-
-
-$(BINDIR)/$(CONFIG)/gen_legal_metadata_characters: $(GEN_LEGAL_METADATA_CHARACTERS_OBJS)
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(GEN_LEGAL_METADATA_CHARACTERS_OBJS) $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/gen_legal_metadata_characters
-
-endif
-
-$(OBJDIR)/$(CONFIG)/tools/codegen/core/gen_legal_metadata_characters.o: 
-
-deps_gen_legal_metadata_characters: $(GEN_LEGAL_METADATA_CHARACTERS_OBJS:.o=.dep)
-
-ifneq ($(NO_SECURE),true)
-ifneq ($(NO_DEPS),true)
--include $(GEN_LEGAL_METADATA_CHARACTERS_OBJS:.o=.dep)
-endif
-endif
-
-
-GEN_PERCENT_ENCODING_TABLES_SRC = \
-    tools/codegen/core/gen_percent_encoding_tables.c \
-
-GEN_PERCENT_ENCODING_TABLES_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(GEN_PERCENT_ENCODING_TABLES_SRC))))
-ifeq ($(NO_SECURE),true)
-
-# You can't build secure targets if you don't have OpenSSL.
-
-$(BINDIR)/$(CONFIG)/gen_percent_encoding_tables: openssl_dep_error
-
-else
-
-
-
-$(BINDIR)/$(CONFIG)/gen_percent_encoding_tables: $(GEN_PERCENT_ENCODING_TABLES_OBJS)
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(GEN_PERCENT_ENCODING_TABLES_OBJS) $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/gen_percent_encoding_tables
-
-endif
-
-$(OBJDIR)/$(CONFIG)/tools/codegen/core/gen_percent_encoding_tables.o: 
-
-deps_gen_percent_encoding_tables: $(GEN_PERCENT_ENCODING_TABLES_OBJS:.o=.dep)
-
-ifneq ($(NO_SECURE),true)
-ifneq ($(NO_DEPS),true)
--include $(GEN_PERCENT_ENCODING_TABLES_OBJS:.o=.dep)
-endif
-endif
-
-
 GOAWAY_SERVER_TEST_SRC = \
     test/core/end2end/goaway_server_test.cc \
 
@@ -17443,6 +17347,102 @@ endif
 endif
 
 
+GEN_HPACK_TABLES_SRC = \
+    tools/codegen/core/gen_hpack_tables.cc \
+
+GEN_HPACK_TABLES_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(GEN_HPACK_TABLES_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/gen_hpack_tables: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/gen_hpack_tables: $(GEN_HPACK_TABLES_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(GEN_HPACK_TABLES_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/gen_hpack_tables
+
+endif
+
+$(OBJDIR)/$(CONFIG)/tools/codegen/core/gen_hpack_tables.o:  $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc.a
+
+deps_gen_hpack_tables: $(GEN_HPACK_TABLES_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(GEN_HPACK_TABLES_OBJS:.o=.dep)
+endif
+endif
+
+
+GEN_LEGAL_METADATA_CHARACTERS_SRC = \
+    tools/codegen/core/gen_legal_metadata_characters.cc \
+
+GEN_LEGAL_METADATA_CHARACTERS_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(GEN_LEGAL_METADATA_CHARACTERS_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/gen_legal_metadata_characters: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/gen_legal_metadata_characters: $(GEN_LEGAL_METADATA_CHARACTERS_OBJS)
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(GEN_LEGAL_METADATA_CHARACTERS_OBJS) $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/gen_legal_metadata_characters
+
+endif
+
+$(OBJDIR)/$(CONFIG)/tools/codegen/core/gen_legal_metadata_characters.o: 
+
+deps_gen_legal_metadata_characters: $(GEN_LEGAL_METADATA_CHARACTERS_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(GEN_LEGAL_METADATA_CHARACTERS_OBJS:.o=.dep)
+endif
+endif
+
+
+GEN_PERCENT_ENCODING_TABLES_SRC = \
+    tools/codegen/core/gen_percent_encoding_tables.cc \
+
+GEN_PERCENT_ENCODING_TABLES_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(GEN_PERCENT_ENCODING_TABLES_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/gen_percent_encoding_tables: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/gen_percent_encoding_tables: $(GEN_PERCENT_ENCODING_TABLES_OBJS)
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(GEN_PERCENT_ENCODING_TABLES_OBJS) $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/gen_percent_encoding_tables
+
+endif
+
+$(OBJDIR)/$(CONFIG)/tools/codegen/core/gen_percent_encoding_tables.o: 
+
+deps_gen_percent_encoding_tables: $(GEN_PERCENT_ENCODING_TABLES_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(GEN_PERCENT_ENCODING_TABLES_OBJS:.o=.dep)
+endif
+endif
+
+
 
 # boringssl needs an override to ensure that it does not include
 # system openssl headers regardless of other configuration
diff --git a/README.md b/README.md
index 048614a205..53078e6078 100644
--- a/README.md
+++ b/README.md
@@ -25,15 +25,15 @@ This repository contains source code for gRPC libraries for multiple languages w
 
 Libraries in different languages may be in different states of development. We are seeking contributions for all of these libraries.
 
-| Language                | Source                              | Status  |
-|-------------------------|-------------------------------------|---------|
-| Shared C [core library] | [src/core](src/core)                | 1.6     |
-| C++                     | [src/cpp](src/cpp)                  | 1.6     |
-| Ruby                    | [src/ruby](src/ruby)                | 1.6     |
-| Python                  | [src/python](src/python)            | 1.6     |
-| PHP                     | [src/php](src/php)                  | 1.6     |
-| C#                      | [src/csharp](src/csharp)            | 1.6     |
-| Objective-C             | [src/objective-c](src/objective-c)  | 1.6     |
+| Language                | Source                              |
+|-------------------------|-------------------------------------|
+| Shared C [core library] | [src/core](src/core)                |
+| C++                     | [src/cpp](src/cpp)                  |
+| Ruby                    | [src/ruby](src/ruby)                |
+| Python                  | [src/python](src/python)            |
+| PHP                     | [src/php](src/php)                  |
+| C#                      | [src/csharp](src/csharp)            |
+| Objective-C             | [src/objective-c](src/objective-c)  |
 
 Java source code is in the [grpc-java](http://github.com/grpc/grpc-java)
 repository. Go source code is in the
diff --git a/bazel/grpc_build_system.bzl b/bazel/grpc_build_system.bzl
index 2ef8544502..234d129aa3 100644
--- a/bazel/grpc_build_system.bzl
+++ b/bazel/grpc_build_system.bzl
@@ -87,7 +87,7 @@ def grpc_cc_test(name, srcs = [], deps = [], external_deps = [], args = [], data
     'linkopts': ["-pthread"],
   }
   if uses_polling:
-    native.cc_binary(testonly=True, **args)
+    native.cc_test(testonly=True, tags=['manual'], **args)
     for poller in POLLERS:
       native.sh_test(
         name = name + '@poller=' + poller,
@@ -98,7 +98,7 @@ def grpc_cc_test(name, srcs = [], deps = [], external_deps = [], args = [], data
         args = [
           poller,
           '$(location %s)' % name
-        ],
+        ] + args['args'],
       )
   else:
     native.cc_test(**args)
diff --git a/build.yaml b/build.yaml
index 9e9dcbc0b4..42d7245981 100644
--- a/build.yaml
+++ b/build.yaml
@@ -2110,28 +2110,6 @@ targets:
   - mac
   - linux
   - posix
-- name: gen_hpack_tables
-  build: tool
-  language: c
-  src:
-  - tools/codegen/core/gen_hpack_tables.c
-  deps:
-  - gpr
-  - grpc
-  uses_polling: false
-- name: gen_legal_metadata_characters
-  build: tool
-  language: c
-  src:
-  - tools/codegen/core/gen_legal_metadata_characters.c
-  deps: []
-- name: gen_percent_encoding_tables
-  build: tool
-  language: c
-  src:
-  - tools/codegen/core/gen_percent_encoding_tables.c
-  deps: []
-  uses_polling: false
 - name: goaway_server_test
   cpu_cost: 0.1
   build: test
@@ -4846,6 +4824,28 @@ targets:
   deps:
   - grpc
   - gpr
+- name: gen_hpack_tables
+  build: tool
+  language: cc
+  src:
+  - tools/codegen/core/gen_hpack_tables.cc
+  deps:
+  - gpr
+  - grpc
+  uses_polling: false
+- name: gen_legal_metadata_characters
+  build: tool
+  language: cc
+  src:
+  - tools/codegen/core/gen_legal_metadata_characters.cc
+  deps: []
+- name: gen_percent_encoding_tables
+  build: tool
+  language: cc
+  src:
+  - tools/codegen/core/gen_percent_encoding_tables.cc
+  deps: []
+  uses_polling: false
 vspackages:
 - linkage: static
   name: grpc.dependencies.zlib
diff --git a/doc/PROTOCOL-HTTP2.md b/doc/PROTOCOL-HTTP2.md
index 29d3cc2e76..107a8e8824 100644
--- a/doc/PROTOCOL-HTTP2.md
+++ b/doc/PROTOCOL-HTTP2.md
@@ -1,7 +1,7 @@
 # gRPC over HTTP2
 
 ## Introduction
-This document serves as a detailed description for an implementation of gRPC carried over HTTP2 draft 17 framing. It assumes familiarity with the HTTP2 specification.
+This document serves as a detailed description for an implementation of gRPC carried over <a href="https://tools.ietf.org/html/rfc7540">HTTP2 framing</a>. It assumes familiarity with the HTTP2 specification.
 
 ## Protocol
 Production rules are using <a href="http://tools.ietf.org/html/rfc5234">ABNF syntax</a>.
@@ -24,7 +24,7 @@ Request-Headers are delivered as HTTP2 headers in HEADERS + CONTINUATION frames.
 * **Call-Definition** → Method Scheme Path TE [Authority] [Timeout] Content-Type [Message-Type] [Message-Encoding] [Message-Accept-Encoding] [User-Agent]
 * **Method** →  ":method POST"
 * **Scheme** → ":scheme "  ("http" / "https")
-* **Path** → ":path" "/" Service-Name "/" {_method name_}
+* **Path** → ":path" "/" Service-Name "/" {_method name_}  # But see note below.
 * **Service-Name** → {_IDL-specific service name_}
 * **Authority** → ":authority" {_virtual host name of authority_}
 * **TE** → "te" "trailers"  # Used to detect incompatible proxies
@@ -170,6 +170,7 @@ HEADERS (flags = END_STREAM, END_HEADERS)
 grpc-status = 0 # OK
 trace-proto-bin = jher831yy13JHy3hc
 ```
+
 #### User Agents
 
 While the protocol does not require a user-agent to function it is recommended that clients provide a structured user-agent string that provides a basic description of the calling library, version & platform to facilitate issue diagnosis in heterogeneous environments. The following structure is recommended to library developers
@@ -197,7 +198,7 @@ Unless explicitly defined to be, gRPC Calls are not assumed to be idempotent.  S
 #### HTTP2 Transport Mapping
 
 ##### Stream Identification
-All GRPC calls need to specify an internal ID. We will use HTTP2 stream-ids as call identifiers in this scheme. NOTE: These id’s are contextual to an open HTTP2 session and will not be unique within a given process that is handling more than one HTTP2 session nor can they be used as GUIDs.
+All GRPC calls need to specify an internal ID. We will use HTTP2 stream-ids as call identifiers in this scheme. NOTE: These ids are contextual to an open HTTP2 session and will not be unique within a given process that is handling more than one HTTP2 session nor can they be used as GUIDs.
 
 ##### Data Frames
 DATA frame boundaries have no relation to **Length-Prefixed-Message** boundaries and implementations should make no assumptions about their alignment.
@@ -232,6 +233,7 @@ INADEQUATE_SECURITY| PERMISSION_DENIED … with additional detail indicating tha
 The HTTP2 specification mandates the use of TLS 1.2 or higher when TLS is used with HTTP2. It also places some additional constraints on the allowed ciphers in deployments to avoid known-problems as well as requiring SNI support. It is also expected that HTTP2 will be used in conjunction with proprietary transport security mechanisms about which the specification can make no meaningful recommendations.
 
 ##### Connection Management
+
 ###### GOAWAY Frame
 Sent by servers to clients to indicate that they will no longer accept any new streams on the associated connections. This frame includes the id of the last successfully accepted stream by the server. Clients should consider any stream initiated after the last successfully accepted stream as UNAVAILABLE and retry the call elsewhere. Clients are free to continue working with the already accepted streams until they complete or the connection is terminated.
 
diff --git a/examples/python/helloworld/greeter_client.py b/examples/python/helloworld/greeter_client.py
index d9b2bdfd07..a0aeb47bd7 100644
--- a/examples/python/helloworld/greeter_client.py
+++ b/examples/python/helloworld/greeter_client.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """The Python implementation of the GRPC helloworld.Greeter client."""
 
 from __future__ import print_function
@@ -23,11 +22,11 @@ import helloworld_pb2_grpc
 
 
 def run():
-  channel = grpc.insecure_channel('localhost:50051')
-  stub = helloworld_pb2_grpc.GreeterStub(channel)
-  response = stub.SayHello(helloworld_pb2.HelloRequest(name='you'))
-  print("Greeter client received: " + response.message)
+    channel = grpc.insecure_channel('localhost:50051')
+    stub = helloworld_pb2_grpc.GreeterStub(channel)
+    response = stub.SayHello(helloworld_pb2.HelloRequest(name='you'))
+    print("Greeter client received: " + response.message)
 
 
 if __name__ == '__main__':
-  run()
+    run()
diff --git a/examples/python/helloworld/greeter_server.py b/examples/python/helloworld/greeter_server.py
index be61695616..c355662ef8 100644
--- a/examples/python/helloworld/greeter_server.py
+++ b/examples/python/helloworld/greeter_server.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """The Python implementation of the GRPC helloworld.Greeter server."""
 
 from concurrent import futures
@@ -27,20 +26,21 @@ _ONE_DAY_IN_SECONDS = 60 * 60 * 24
 
 class Greeter(helloworld_pb2_grpc.GreeterServicer):
 
-  def SayHello(self, request, context):
-    return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name)
+    def SayHello(self, request, context):
+        return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name)
 
 
 def serve():
-  server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
-  helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)
-  server.add_insecure_port('[::]:50051')
-  server.start()
-  try:
-    while True:
-      time.sleep(_ONE_DAY_IN_SECONDS)
-  except KeyboardInterrupt:
-    server.stop(0)
+    server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
+    helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)
+    server.add_insecure_port('[::]:50051')
+    server.start()
+    try:
+        while True:
+            time.sleep(_ONE_DAY_IN_SECONDS)
+    except KeyboardInterrupt:
+        server.stop(0)
+
 
 if __name__ == '__main__':
-  serve()
+    serve()
diff --git a/examples/python/interceptors/default_value/default_value_client_interceptor.py b/examples/python/interceptors/default_value/default_value_client_interceptor.py
new file mode 100644
index 0000000000..c549f2b861
--- /dev/null
+++ b/examples/python/interceptors/default_value/default_value_client_interceptor.py
@@ -0,0 +1,68 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Interceptor that adds headers to outgoing requests."""
+
+import collections
+
+import grpc
+
+
+class _ConcreteValue(grpc.Future):
+
+    def __init__(self, result):
+        self._result = result
+
+    def cancel(self):
+        return False
+
+    def cancelled(self):
+        return False
+
+    def running(self):
+        return False
+
+    def done(self):
+        return True
+
+    def result(self, timeout=None):
+        return self._result
+
+    def exception(self, timeout=None):
+        return None
+
+    def traceback(self, timeout=None):
+        return None
+
+    def add_done_callback(self, fn):
+        fn(self._result)
+
+
+class DefaultValueClientInterceptor(grpc.UnaryUnaryClientInterceptor,
+                                    grpc.StreamUnaryClientInterceptor):
+
+    def __init__(self, value):
+        self._default = _ConcreteValue(value)
+
+    def _intercept_call(self, continuation, client_call_details,
+                        request_or_iterator):
+        response = continuation(client_call_details, request_or_iterator)
+        return self._default if response.exception() else response
+
+    def intercept_unary_unary(self, continuation, client_call_details, request):
+        return self._intercept_call(continuation, client_call_details, request)
+
+    def intercept_stream_unary(self, continuation, client_call_details,
+                               request_iterator):
+        return self._intercept_call(continuation, client_call_details,
+                                    request_iterator)
diff --git a/examples/python/interceptors/default_value/greeter_client.py b/examples/python/interceptors/default_value/greeter_client.py
new file mode 100644
index 0000000000..aba7571d83
--- /dev/null
+++ b/examples/python/interceptors/default_value/greeter_client.py
@@ -0,0 +1,38 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""The Python implementation of the gRPC helloworld.Greeter client."""
+
+from __future__ import print_function
+
+import grpc
+
+import helloworld_pb2
+import helloworld_pb2_grpc
+import default_value_client_interceptor
+
+
+def run():
+    default_value = helloworld_pb2.HelloReply(
+        message='Hello from your local interceptor!')
+    default_value_interceptor = default_value_client_interceptor.DefaultValueClientInterceptor(
+        default_value)
+    channel = grpc.insecure_channel('localhost:50051')
+    channel = grpc.intercept_channel(channel, default_value_interceptor)
+    stub = helloworld_pb2_grpc.GreeterStub(channel)
+    response = stub.SayHello(helloworld_pb2.HelloRequest(name='you'))
+    print("Greeter client received: " + response.message)
+
+
+if __name__ == '__main__':
+    run()
diff --git a/examples/python/interceptors/default_value/helloworld_pb2.py b/examples/python/interceptors/default_value/helloworld_pb2.py
new file mode 100644
index 0000000000..e18ab9acc7
--- /dev/null
+++ b/examples/python/interceptors/default_value/helloworld_pb2.py
@@ -0,0 +1,134 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: helloworld.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='helloworld.proto',
+  package='helloworld',
+  syntax='proto3',
+  serialized_pb=_b('\n\x10helloworld.proto\x12\nhelloworld\"\x1c\n\x0cHelloRequest\x12\x0c\n\x04name\x18\x01 \x01(\t\"\x1d\n\nHelloReply\x12\x0f\n\x07message\x18\x01 \x01(\t2I\n\x07Greeter\x12>\n\x08SayHello\x12\x18.helloworld.HelloRequest\x1a\x16.helloworld.HelloReply\"\x00\x42\x36\n\x1bio.grpc.examples.helloworldB\x0fHelloWorldProtoP\x01\xa2\x02\x03HLWb\x06proto3')
+)
+
+
+
+
+_HELLOREQUEST = _descriptor.Descriptor(
+  name='HelloRequest',
+  full_name='helloworld.HelloRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='helloworld.HelloRequest.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=32,
+  serialized_end=60,
+)
+
+
+_HELLOREPLY = _descriptor.Descriptor(
+  name='HelloReply',
+  full_name='helloworld.HelloReply',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='message', full_name='helloworld.HelloReply.message', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=62,
+  serialized_end=91,
+)
+
+DESCRIPTOR.message_types_by_name['HelloRequest'] = _HELLOREQUEST
+DESCRIPTOR.message_types_by_name['HelloReply'] = _HELLOREPLY
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+HelloRequest = _reflection.GeneratedProtocolMessageType('HelloRequest', (_message.Message,), dict(
+  DESCRIPTOR = _HELLOREQUEST,
+  __module__ = 'helloworld_pb2'
+  # @@protoc_insertion_point(class_scope:helloworld.HelloRequest)
+  ))
+_sym_db.RegisterMessage(HelloRequest)
+
+HelloReply = _reflection.GeneratedProtocolMessageType('HelloReply', (_message.Message,), dict(
+  DESCRIPTOR = _HELLOREPLY,
+  __module__ = 'helloworld_pb2'
+  # @@protoc_insertion_point(class_scope:helloworld.HelloReply)
+  ))
+_sym_db.RegisterMessage(HelloReply)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\033io.grpc.examples.helloworldB\017HelloWorldProtoP\001\242\002\003HLW'))
+
+_GREETER = _descriptor.ServiceDescriptor(
+  name='Greeter',
+  full_name='helloworld.Greeter',
+  file=DESCRIPTOR,
+  index=0,
+  options=None,
+  serialized_start=93,
+  serialized_end=166,
+  methods=[
+  _descriptor.MethodDescriptor(
+    name='SayHello',
+    full_name='helloworld.Greeter.SayHello',
+    index=0,
+    containing_service=None,
+    input_type=_HELLOREQUEST,
+    output_type=_HELLOREPLY,
+    options=None,
+  ),
+])
+_sym_db.RegisterServiceDescriptor(_GREETER)
+
+DESCRIPTOR.services_by_name['Greeter'] = _GREETER
+
+# @@protoc_insertion_point(module_scope)
diff --git a/examples/python/interceptors/default_value/helloworld_pb2_grpc.py b/examples/python/interceptors/default_value/helloworld_pb2_grpc.py
new file mode 100644
index 0000000000..18e07d1679
--- /dev/null
+++ b/examples/python/interceptors/default_value/helloworld_pb2_grpc.py
@@ -0,0 +1,46 @@
+# Generated by the gRPC Python protocol compiler plugin. DO NOT EDIT!
+import grpc
+
+import helloworld_pb2 as helloworld__pb2
+
+
+class GreeterStub(object):
+  """The greeting service definition.
+  """
+
+  def __init__(self, channel):
+    """Constructor.
+
+    Args:
+      channel: A grpc.Channel.
+    """
+    self.SayHello = channel.unary_unary(
+        '/helloworld.Greeter/SayHello',
+        request_serializer=helloworld__pb2.HelloRequest.SerializeToString,
+        response_deserializer=helloworld__pb2.HelloReply.FromString,
+        )
+
+
+class GreeterServicer(object):
+  """The greeting service definition.
+  """
+
+  def SayHello(self, request, context):
+    """Sends a greeting
+    """
+    context.set_code(grpc.StatusCode.UNIMPLEMENTED)
+    context.set_details('Method not implemented!')
+    raise NotImplementedError('Method not implemented!')
+
+
+def add_GreeterServicer_to_server(servicer, server):
+  rpc_method_handlers = {
+      'SayHello': grpc.unary_unary_rpc_method_handler(
+          servicer.SayHello,
+          request_deserializer=helloworld__pb2.HelloRequest.FromString,
+          response_serializer=helloworld__pb2.HelloReply.SerializeToString,
+      ),
+  }
+  generic_handler = grpc.method_handlers_generic_handler(
+      'helloworld.Greeter', rpc_method_handlers)
+  server.add_generic_rpc_handlers((generic_handler,))
diff --git a/examples/python/interceptors/headers/generic_client_interceptor.py b/examples/python/interceptors/headers/generic_client_interceptor.py
new file mode 100644
index 0000000000..30b0755aaf
--- /dev/null
+++ b/examples/python/interceptors/headers/generic_client_interceptor.py
@@ -0,0 +1,55 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Base class for interceptors that operate on all RPC types."""
+
+import grpc
+
+
+class _GenericClientInterceptor(
+        grpc.UnaryUnaryClientInterceptor, grpc.UnaryStreamClientInterceptor,
+        grpc.StreamUnaryClientInterceptor, grpc.StreamStreamClientInterceptor):
+
+    def __init__(self, interceptor_function):
+        self._fn = interceptor_function
+
+    def intercept_unary_unary(self, continuation, client_call_details, request):
+        new_details, new_request_iterator, postprocess = self._fn(
+            client_call_details, iter((request,)), False, False)
+        response = continuation(new_details, next(new_request_iterator))
+        return postprocess(response) if postprocess else response
+
+    def intercept_unary_stream(self, continuation, client_call_details,
+                               request):
+        new_details, new_request_iterator, postprocess = self._fn(
+            client_call_details, iter((request,)), False, True)
+        response_it = continuation(new_details, new_request_iterator)
+        return postprocess(response_it) if postprocess else response_it
+
+    def intercept_stream_unary(self, continuation, client_call_details,
+                               request_iterator):
+        new_details, new_request_iterator, postprocess = self._fn(
+            client_call_details, request_iterator, True, False)
+        response = continuation(new_details, next(new_request_iterator))
+        return postprocess(response) if postprocess else response
+
+    def intercept_stream_stream(self, continuation, client_call_details,
+                                request_iterator):
+        new_details, new_request_iterator, postprocess = self._fn(
+            client_call_details, request_iterator, True, True)
+        response_it = continuation(new_details, new_request_iterator)
+        return postprocess(response_it) if postprocess else response_it
+
+
+def create(intercept_call):
+    return _GenericClientInterceptor(intercept_call)
diff --git a/examples/python/interceptors/headers/greeter_client.py b/examples/python/interceptors/headers/greeter_client.py
new file mode 100644
index 0000000000..2b0dd3e177
--- /dev/null
+++ b/examples/python/interceptors/headers/greeter_client.py
@@ -0,0 +1,36 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""The Python implementation of the GRPC helloworld.Greeter client."""
+
+from __future__ import print_function
+
+import grpc
+
+import helloworld_pb2
+import helloworld_pb2_grpc
+import header_manipulator_client_interceptor
+
+
+def run():
+    header_adder_interceptor = header_manipulator_client_interceptor.header_adder_interceptor(
+        'one-time-password', '42')
+    channel = grpc.insecure_channel('localhost:50051')
+    channel = grpc.intercept_channel(channel, header_adder_interceptor)
+    stub = helloworld_pb2_grpc.GreeterStub(channel)
+    response = stub.SayHello(helloworld_pb2.HelloRequest(name='you'))
+    print("Greeter client received: " + response.message)
+
+
+if __name__ == '__main__':
+    run()
diff --git a/examples/python/interceptors/headers/greeter_server.py b/examples/python/interceptors/headers/greeter_server.py
new file mode 100644
index 0000000000..01968609b5
--- /dev/null
+++ b/examples/python/interceptors/headers/greeter_server.py
@@ -0,0 +1,52 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""The Python implementation of the GRPC helloworld.Greeter server."""
+
+from concurrent import futures
+import time
+
+import grpc
+
+import helloworld_pb2
+import helloworld_pb2_grpc
+from request_header_validator_interceptor import RequestHeaderValidatorInterceptor
+
+_ONE_DAY_IN_SECONDS = 60 * 60 * 24
+
+
+class Greeter(helloworld_pb2_grpc.GreeterServicer):
+
+    def SayHello(self, request, context):
+        return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name)
+
+
+def serve():
+    header_validator = RequestHeaderValidatorInterceptor(
+        'one-time-password', '42', grpc.StatusCode.UNAUTHENTICATED,
+        'Access denied!')
+    server = grpc.server(
+        futures.ThreadPoolExecutor(max_workers=10),
+        interceptors=(header_validator,))
+    helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)
+    server.add_insecure_port('[::]:50051')
+    server.start()
+    try:
+        while True:
+            time.sleep(_ONE_DAY_IN_SECONDS)
+    except KeyboardInterrupt:
+        server.stop(0)
+
+
+if __name__ == '__main__':
+    serve()
diff --git a/examples/python/interceptors/headers/header_manipulator_client_interceptor.py b/examples/python/interceptors/headers/header_manipulator_client_interceptor.py
new file mode 100644
index 0000000000..ac7c605144
--- /dev/null
+++ b/examples/python/interceptors/headers/header_manipulator_client_interceptor.py
@@ -0,0 +1,42 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Interceptor that adds headers to outgoing requests."""
+
+import collections
+
+import grpc
+import generic_client_interceptor
+
+
+class _ClientCallDetails(
+        collections.namedtuple('_ClientCallDetails',
+                               ('method', 'timeout', 'metadata',
+                                'credentials')), grpc.ClientCallDetails):
+    pass
+
+
+def header_adder_interceptor(header, value):
+
+    def intercept_call(client_call_details, request_iterator, request_streaming,
+                       response_streaming):
+        metadata = []
+        if client_call_details.metadata is not None:
+            metadata = list(client_call_details.metadata)
+        metadata.append((header, value,))
+        client_call_details = _ClientCallDetails(
+            client_call_details.method, client_call_details.timeout, metadata,
+            client_call_details.credentials)
+        return client_call_details, request_iterator, None
+
+    return generic_client_interceptor.create(intercept_call)
diff --git a/examples/python/interceptors/headers/helloworld_pb2.py b/examples/python/interceptors/headers/helloworld_pb2.py
new file mode 100644
index 0000000000..e18ab9acc7
--- /dev/null
+++ b/examples/python/interceptors/headers/helloworld_pb2.py
@@ -0,0 +1,134 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: helloworld.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='helloworld.proto',
+  package='helloworld',
+  syntax='proto3',
+  serialized_pb=_b('\n\x10helloworld.proto\x12\nhelloworld\"\x1c\n\x0cHelloRequest\x12\x0c\n\x04name\x18\x01 \x01(\t\"\x1d\n\nHelloReply\x12\x0f\n\x07message\x18\x01 \x01(\t2I\n\x07Greeter\x12>\n\x08SayHello\x12\x18.helloworld.HelloRequest\x1a\x16.helloworld.HelloReply\"\x00\x42\x36\n\x1bio.grpc.examples.helloworldB\x0fHelloWorldProtoP\x01\xa2\x02\x03HLWb\x06proto3')
+)
+
+
+
+
+_HELLOREQUEST = _descriptor.Descriptor(
+  name='HelloRequest',
+  full_name='helloworld.HelloRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='helloworld.HelloRequest.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=32,
+  serialized_end=60,
+)
+
+
+_HELLOREPLY = _descriptor.Descriptor(
+  name='HelloReply',
+  full_name='helloworld.HelloReply',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='message', full_name='helloworld.HelloReply.message', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=62,
+  serialized_end=91,
+)
+
+DESCRIPTOR.message_types_by_name['HelloRequest'] = _HELLOREQUEST
+DESCRIPTOR.message_types_by_name['HelloReply'] = _HELLOREPLY
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+HelloRequest = _reflection.GeneratedProtocolMessageType('HelloRequest', (_message.Message,), dict(
+  DESCRIPTOR = _HELLOREQUEST,
+  __module__ = 'helloworld_pb2'
+  # @@protoc_insertion_point(class_scope:helloworld.HelloRequest)
+  ))
+_sym_db.RegisterMessage(HelloRequest)
+
+HelloReply = _reflection.GeneratedProtocolMessageType('HelloReply', (_message.Message,), dict(
+  DESCRIPTOR = _HELLOREPLY,
+  __module__ = 'helloworld_pb2'
+  # @@protoc_insertion_point(class_scope:helloworld.HelloReply)
+  ))
+_sym_db.RegisterMessage(HelloReply)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\033io.grpc.examples.helloworldB\017HelloWorldProtoP\001\242\002\003HLW'))
+
+_GREETER = _descriptor.ServiceDescriptor(
+  name='Greeter',
+  full_name='helloworld.Greeter',
+  file=DESCRIPTOR,
+  index=0,
+  options=None,
+  serialized_start=93,
+  serialized_end=166,
+  methods=[
+  _descriptor.MethodDescriptor(
+    name='SayHello',
+    full_name='helloworld.Greeter.SayHello',
+    index=0,
+    containing_service=None,
+    input_type=_HELLOREQUEST,
+    output_type=_HELLOREPLY,
+    options=None,
+  ),
+])
+_sym_db.RegisterServiceDescriptor(_GREETER)
+
+DESCRIPTOR.services_by_name['Greeter'] = _GREETER
+
+# @@protoc_insertion_point(module_scope)
diff --git a/examples/python/interceptors/headers/helloworld_pb2_grpc.py b/examples/python/interceptors/headers/helloworld_pb2_grpc.py
new file mode 100644
index 0000000000..18e07d1679
--- /dev/null
+++ b/examples/python/interceptors/headers/helloworld_pb2_grpc.py
@@ -0,0 +1,46 @@
+# Generated by the gRPC Python protocol compiler plugin. DO NOT EDIT!
+import grpc
+
+import helloworld_pb2 as helloworld__pb2
+
+
+class GreeterStub(object):
+  """The greeting service definition.
+  """
+
+  def __init__(self, channel):
+    """Constructor.
+
+    Args:
+      channel: A grpc.Channel.
+    """
+    self.SayHello = channel.unary_unary(
+        '/helloworld.Greeter/SayHello',
+        request_serializer=helloworld__pb2.HelloRequest.SerializeToString,
+        response_deserializer=helloworld__pb2.HelloReply.FromString,
+        )
+
+
+class GreeterServicer(object):
+  """The greeting service definition.
+  """
+
+  def SayHello(self, request, context):
+    """Sends a greeting
+    """
+    context.set_code(grpc.StatusCode.UNIMPLEMENTED)
+    context.set_details('Method not implemented!')
+    raise NotImplementedError('Method not implemented!')
+
+
+def add_GreeterServicer_to_server(servicer, server):
+  rpc_method_handlers = {
+      'SayHello': grpc.unary_unary_rpc_method_handler(
+          servicer.SayHello,
+          request_deserializer=helloworld__pb2.HelloRequest.FromString,
+          response_serializer=helloworld__pb2.HelloReply.SerializeToString,
+      ),
+  }
+  generic_handler = grpc.method_handlers_generic_handler(
+      'helloworld.Greeter', rpc_method_handlers)
+  server.add_generic_rpc_handlers((generic_handler,))
diff --git a/examples/python/interceptors/headers/request_header_validator_interceptor.py b/examples/python/interceptors/headers/request_header_validator_interceptor.py
new file mode 100644
index 0000000000..95af4177ba
--- /dev/null
+++ b/examples/python/interceptors/headers/request_header_validator_interceptor.py
@@ -0,0 +1,39 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Interceptor that ensures a specific header is present."""
+
+import grpc
+
+
+def _unary_unary_rpc_terminator(code, details):
+
+    def terminate(ignored_request, context):
+        context.abort(code, details)
+
+    return grpc.unary_unary_rpc_method_handler(terminate)
+
+
+class RequestHeaderValidatorInterceptor(grpc.ServerInterceptor):
+
+    def __init__(self, header, value, code, details):
+        self._header = header
+        self._value = value
+        self._terminator = _unary_unary_rpc_terminator(code, details)
+
+    def intercept_service(self, continuation, handler_call_details):
+        if (self._header,
+                self._value) in handler_call_details.invocation_metadata:
+            return continuation(handler_call_details)
+        else:
+            return self._terminator
diff --git a/examples/python/multiplex/multiplex_client.py b/examples/python/multiplex/multiplex_client.py
index c8c700afcd..49713f35b7 100644
--- a/examples/python/multiplex/multiplex_client.py
+++ b/examples/python/multiplex/multiplex_client.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """A client that makes both Greeter and RouteGuide RPCs."""
 
 from __future__ import print_function
@@ -29,98 +28,99 @@ import route_guide_resources
 
 
 def make_route_note(message, latitude, longitude):
-  return route_guide_pb2.RouteNote(
-      message=message,
-      location=route_guide_pb2.Point(latitude=latitude, longitude=longitude))
+    return route_guide_pb2.RouteNote(
+        message=message,
+        location=route_guide_pb2.Point(latitude=latitude, longitude=longitude))
 
 
 def guide_get_one_feature(route_guide_stub, point):
-  feature = route_guide_stub.GetFeature(point)
-  if not feature.location:
-    print("Server returned incomplete feature")
-    return
+    feature = route_guide_stub.GetFeature(point)
+    if not feature.location:
+        print("Server returned incomplete feature")
+        return
 
-  if feature.name:
-    print("Feature called %s at %s" % (feature.name, feature.location))
-  else:
-    print("Found no feature at %s" % feature.location)
+    if feature.name:
+        print("Feature called %s at %s" % (feature.name, feature.location))
+    else:
+        print("Found no feature at %s" % feature.location)
 
 
 def guide_get_feature(route_guide_stub):
-  guide_get_one_feature(
-      route_guide_stub,
-      route_guide_pb2.Point(latitude=409146138, longitude=-746188906))
-  guide_get_one_feature(
-      route_guide_stub, route_guide_pb2.Point(latitude=0, longitude=0))
+    guide_get_one_feature(
+        route_guide_stub,
+        route_guide_pb2.Point(latitude=409146138, longitude=-746188906))
+    guide_get_one_feature(route_guide_stub,
+                          route_guide_pb2.Point(latitude=0, longitude=0))
 
 
 def guide_list_features(route_guide_stub):
-  rectangle = route_guide_pb2.Rectangle(
-      lo=route_guide_pb2.Point(latitude=400000000, longitude=-750000000),
-      hi=route_guide_pb2.Point(latitude=420000000, longitude=-730000000))
-  print("Looking for features between 40, -75 and 42, -73")
+    rectangle = route_guide_pb2.Rectangle(
+        lo=route_guide_pb2.Point(latitude=400000000, longitude=-750000000),
+        hi=route_guide_pb2.Point(latitude=420000000, longitude=-730000000))
+    print("Looking for features between 40, -75 and 42, -73")
 
-  features = route_guide_stub.ListFeatures(rectangle)
+    features = route_guide_stub.ListFeatures(rectangle)
 
-  for feature in features:
-    print("Feature called %s at %s" % (feature.name, feature.location))
+    for feature in features:
+        print("Feature called %s at %s" % (feature.name, feature.location))
 
 
 def generate_route(feature_list):
-  for _ in range(0, 10):
-    random_feature = feature_list[random.randint(0, len(feature_list) - 1)]
-    print("Visiting point %s" % random_feature.location)
-    yield random_feature.location
-    time.sleep(random.uniform(0.5, 1.5))
+    for _ in range(0, 10):
+        random_feature = feature_list[random.randint(0, len(feature_list) - 1)]
+        print("Visiting point %s" % random_feature.location)
+        yield random_feature.location
+        time.sleep(random.uniform(0.5, 1.5))
 
 
 def guide_record_route(route_guide_stub):
-  feature_list = route_guide_resources.read_route_guide_database()
+    feature_list = route_guide_resources.read_route_guide_database()
 
-  route_iterator = generate_route(feature_list)
-  route_summary = route_guide_stub.RecordRoute(route_iterator)
-  print("Finished trip with %s points " % route_summary.point_count)
-  print("Passed %s features " % route_summary.feature_count)
-  print("Travelled %s meters " % route_summary.distance)
-  print("It took %s seconds " % route_summary.elapsed_time)
+    route_iterator = generate_route(feature_list)
+    route_summary = route_guide_stub.RecordRoute(route_iterator)
+    print("Finished trip with %s points " % route_summary.point_count)
+    print("Passed %s features " % route_summary.feature_count)
+    print("Travelled %s meters " % route_summary.distance)
+    print("It took %s seconds " % route_summary.elapsed_time)
 
 
 def generate_messages():
-  messages = [
-      make_route_note("First message", 0, 0),
-      make_route_note("Second message", 0, 1),
-      make_route_note("Third message", 1, 0),
-      make_route_note("Fourth message", 0, 0),
-      make_route_note("Fifth message", 1, 0),
-  ]
-  for msg in messages:
-    print("Sending %s at %s" % (msg.message, msg.location))
-    yield msg
-    time.sleep(random.uniform(0.5, 1.0))
+    messages = [
+        make_route_note("First message", 0, 0),
+        make_route_note("Second message", 0, 1),
+        make_route_note("Third message", 1, 0),
+        make_route_note("Fourth message", 0, 0),
+        make_route_note("Fifth message", 1, 0),
+    ]
+    for msg in messages:
+        print("Sending %s at %s" % (msg.message, msg.location))
+        yield msg
+        time.sleep(random.uniform(0.5, 1.0))
 
 
 def guide_route_chat(route_guide_stub):
-  responses = route_guide_stub.RouteChat(generate_messages())
-  for response in responses:
-    print("Received message %s at %s" % (response.message, response.location))
+    responses = route_guide_stub.RouteChat(generate_messages())
+    for response in responses:
+        print("Received message %s at %s" %
+              (response.message, response.location))
 
 
 def run():
-  channel = grpc.insecure_channel('localhost:50051')
-  greeter_stub = helloworld_pb2_grpc.GreeterStub(channel)
-  route_guide_stub = route_guide_pb2_grpc.RouteGuideStub(channel)
-  greeter_response = greeter_stub.SayHello(
-      helloworld_pb2.HelloRequest(name='you'))
-  print("Greeter client received: " + greeter_response.message)
-  print("-------------- GetFeature --------------")
-  guide_get_feature(route_guide_stub)
-  print("-------------- ListFeatures --------------")
-  guide_list_features(route_guide_stub)
-  print("-------------- RecordRoute --------------")
-  guide_record_route(route_guide_stub)
-  print("-------------- RouteChat --------------")
-  guide_route_chat(route_guide_stub)
+    channel = grpc.insecure_channel('localhost:50051')
+    greeter_stub = helloworld_pb2_grpc.GreeterStub(channel)
+    route_guide_stub = route_guide_pb2_grpc.RouteGuideStub(channel)
+    greeter_response = greeter_stub.SayHello(
+        helloworld_pb2.HelloRequest(name='you'))
+    print("Greeter client received: " + greeter_response.message)
+    print("-------------- GetFeature --------------")
+    guide_get_feature(route_guide_stub)
+    print("-------------- ListFeatures --------------")
+    guide_list_features(route_guide_stub)
+    print("-------------- RecordRoute --------------")
+    guide_record_route(route_guide_stub)
+    print("-------------- RouteChat --------------")
+    guide_route_chat(route_guide_stub)
 
 
 if __name__ == '__main__':
-  run()
+    run()
diff --git a/examples/python/multiplex/multiplex_server.py b/examples/python/multiplex/multiplex_server.py
index 9a6e835bed..e2ff671f97 100644
--- a/examples/python/multiplex/multiplex_server.py
+++ b/examples/python/multiplex/multiplex_server.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """A gRPC server servicing both Greeter and RouteGuide RPCs."""
 
 from concurrent import futures
@@ -30,107 +29,111 @@ _ONE_DAY_IN_SECONDS = 60 * 60 * 24
 
 
 def _get_feature(feature_db, point):
-  """Returns Feature at given location or None."""
-  for feature in feature_db:
-    if feature.location == point:
-      return feature
-  return None
+    """Returns Feature at given location or None."""
+    for feature in feature_db:
+        if feature.location == point:
+            return feature
+    return None
 
 
 def _get_distance(start, end):
-  """Distance between two points."""
-  coord_factor = 10000000.0
-  lat_1 = start.latitude / coord_factor
-  lat_2 = end.latitude / coord_factor
-  lon_1 = start.longitude / coord_factor
-  lon_2 = end.longitude / coord_factor
-  lat_rad_1 = math.radians(lat_1)
-  lat_rad_2 = math.radians(lat_2)
-  delta_lat_rad = math.radians(lat_2 - lat_1)
-  delta_lon_rad = math.radians(lon_2 - lon_1)
-
-  a = (pow(math.sin(delta_lat_rad / 2), 2) +
-       (math.cos(lat_rad_1) * math.cos(lat_rad_2) *
-        pow(math.sin(delta_lon_rad / 2), 2)))
-  c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a))
-  R = 6371000; # metres
-  return R * c;
+    """Distance between two points."""
+    coord_factor = 10000000.0
+    lat_1 = start.latitude / coord_factor
+    lat_2 = end.latitude / coord_factor
+    lon_1 = start.longitude / coord_factor
+    lon_2 = end.longitude / coord_factor
+    lat_rad_1 = math.radians(lat_1)
+    lat_rad_2 = math.radians(lat_2)
+    delta_lat_rad = math.radians(lat_2 - lat_1)
+    delta_lon_rad = math.radians(lon_2 - lon_1)
+
+    a = (pow(math.sin(delta_lat_rad / 2), 2) +
+         (math.cos(lat_rad_1) * math.cos(lat_rad_2) * pow(
+             math.sin(delta_lon_rad / 2), 2)))
+    c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a))
+    R = 6371000
+    # metres
+    return R * c
 
 
 class _GreeterServicer(helloworld_pb2_grpc.GreeterServicer):
 
-  def SayHello(self, request, context):
-    return helloworld_pb2.HelloReply(message='Hello, {}!'.format(request.name))
+    def SayHello(self, request, context):
+        return helloworld_pb2.HelloReply(
+            message='Hello, {}!'.format(request.name))
 
 
 class _RouteGuideServicer(route_guide_pb2_grpc.RouteGuideServicer):
-  """Provides methods that implement functionality of route guide server."""
-
-  def __init__(self):
-    self.db = route_guide_resources.read_route_guide_database()
-
-  def GetFeature(self, request, context):
-    feature = _get_feature(self.db, request)
-    if feature is None:
-      return route_guide_pb2.Feature(name="", location=request)
-    else:
-      return feature
-
-  def ListFeatures(self, request, context):
-    left = min(request.lo.longitude, request.hi.longitude)
-    right = max(request.lo.longitude, request.hi.longitude)
-    top = max(request.lo.latitude, request.hi.latitude)
-    bottom = min(request.lo.latitude, request.hi.latitude)
-    for feature in self.db:
-      if (feature.location.longitude >= left and
-          feature.location.longitude <= right and
-          feature.location.latitude >= bottom and
-          feature.location.latitude <= top):
-        yield feature
-
-  def RecordRoute(self, request_iterator, context):
-    point_count = 0
-    feature_count = 0
-    distance = 0.0
-    prev_point = None
-
-    start_time = time.time()
-    for point in request_iterator:
-      point_count += 1
-      if _get_feature(self.db, point):
-        feature_count += 1
-      if prev_point:
-        distance += _get_distance(prev_point, point)
-      prev_point = point
-
-    elapsed_time = time.time() - start_time
-    return route_guide_pb2.RouteSummary(point_count=point_count,
-                                        feature_count=feature_count,
-                                        distance=int(distance),
-                                        elapsed_time=int(elapsed_time))
-
-  def RouteChat(self, request_iterator, context):
-    prev_notes = []
-    for new_note in request_iterator:
-      for prev_note in prev_notes:
-        if prev_note.location == new_note.location:
-          yield prev_note
-      prev_notes.append(new_note)
+    """Provides methods that implement functionality of route guide server."""
+
+    def __init__(self):
+        self.db = route_guide_resources.read_route_guide_database()
+
+    def GetFeature(self, request, context):
+        feature = _get_feature(self.db, request)
+        if feature is None:
+            return route_guide_pb2.Feature(name="", location=request)
+        else:
+            return feature
+
+    def ListFeatures(self, request, context):
+        left = min(request.lo.longitude, request.hi.longitude)
+        right = max(request.lo.longitude, request.hi.longitude)
+        top = max(request.lo.latitude, request.hi.latitude)
+        bottom = min(request.lo.latitude, request.hi.latitude)
+        for feature in self.db:
+            if (feature.location.longitude >= left and
+                    feature.location.longitude <= right and
+                    feature.location.latitude >= bottom and
+                    feature.location.latitude <= top):
+                yield feature
+
+    def RecordRoute(self, request_iterator, context):
+        point_count = 0
+        feature_count = 0
+        distance = 0.0
+        prev_point = None
+
+        start_time = time.time()
+        for point in request_iterator:
+            point_count += 1
+            if _get_feature(self.db, point):
+                feature_count += 1
+            if prev_point:
+                distance += _get_distance(prev_point, point)
+            prev_point = point
+
+        elapsed_time = time.time() - start_time
+        return route_guide_pb2.RouteSummary(
+            point_count=point_count,
+            feature_count=feature_count,
+            distance=int(distance),
+            elapsed_time=int(elapsed_time))
+
+    def RouteChat(self, request_iterator, context):
+        prev_notes = []
+        for new_note in request_iterator:
+            for prev_note in prev_notes:
+                if prev_note.location == new_note.location:
+                    yield prev_note
+            prev_notes.append(new_note)
 
 
 def serve():
-  server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
-  helloworld_pb2_grpc.add_GreeterServicer_to_server(_GreeterServicer(), server)
-  route_guide_pb2_grpc.add_RouteGuideServicer_to_server(
-      _RouteGuideServicer(), server)
-  server.add_insecure_port('[::]:50051')
-  server.start()
-  try:
-    while True:
-      time.sleep(_ONE_DAY_IN_SECONDS)
-  except KeyboardInterrupt:
-    server.stop(0)
+    server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
+    helloworld_pb2_grpc.add_GreeterServicer_to_server(_GreeterServicer(),
+                                                      server)
+    route_guide_pb2_grpc.add_RouteGuideServicer_to_server(_RouteGuideServicer(),
+                                                          server)
+    server.add_insecure_port('[::]:50051')
+    server.start()
+    try:
+        while True:
+            time.sleep(_ONE_DAY_IN_SECONDS)
+    except KeyboardInterrupt:
+        server.stop(0)
 
 
 if __name__ == '__main__':
-  serve()
+    serve()
diff --git a/examples/python/multiplex/route_guide_resources.py b/examples/python/multiplex/route_guide_resources.py
index 0887863660..ace85d6f9d 100644
--- a/examples/python/multiplex/route_guide_resources.py
+++ b/examples/python/multiplex/route_guide_resources.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Common resources used in the gRPC route guide example."""
 
 import json
@@ -20,19 +19,19 @@ import route_guide_pb2
 
 
 def read_route_guide_database():
-  """Reads the route guide database.
+    """Reads the route guide database.
 
   Returns:
     The full contents of the route guide database as a sequence of
       route_guide_pb2.Features.
   """
-  feature_list = []
-  with open("route_guide_db.json") as route_guide_db_file:
-    for item in json.load(route_guide_db_file):
-      feature = route_guide_pb2.Feature(
-          name=item["name"],
-          location=route_guide_pb2.Point(
-              latitude=item["location"]["latitude"],
-              longitude=item["location"]["longitude"]))
-      feature_list.append(feature)
-  return feature_list
+    feature_list = []
+    with open("route_guide_db.json") as route_guide_db_file:
+        for item in json.load(route_guide_db_file):
+            feature = route_guide_pb2.Feature(
+                name=item["name"],
+                location=route_guide_pb2.Point(
+                    latitude=item["location"]["latitude"],
+                    longitude=item["location"]["longitude"]))
+            feature_list.append(feature)
+    return feature_list
diff --git a/examples/python/multiplex/run_codegen.py b/examples/python/multiplex/run_codegen.py
index f38d86cf43..d960c3cf16 100644
--- a/examples/python/multiplex/run_codegen.py
+++ b/examples/python/multiplex/run_codegen.py
@@ -11,26 +11,11 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Generates protocol messages and gRPC stubs."""
 
 from grpc_tools import protoc
 
-protoc.main(
-    (
-        '',
-        '-I../../protos',
-        '--python_out=.',
-        '--grpc_python_out=.',
-        '../../protos/helloworld.proto',
-    )
-)
-protoc.main(
-    (
-        '',
-        '-I../../protos',
-        '--python_out=.',
-        '--grpc_python_out=.',
-        '../../protos/route_guide.proto',
-    )
-)
+protoc.main(('', '-I../../protos', '--python_out=.', '--grpc_python_out=.',
+             '../../protos/helloworld.proto',))
+protoc.main(('', '-I../../protos', '--python_out=.', '--grpc_python_out=.',
+             '../../protos/route_guide.proto',))
diff --git a/examples/python/route_guide/route_guide_client.py b/examples/python/route_guide/route_guide_client.py
index a0e32fb6f5..c9d0e96ad6 100644
--- a/examples/python/route_guide/route_guide_client.py
+++ b/examples/python/route_guide/route_guide_client.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """The Python implementation of the gRPC route guide client."""
 
 from __future__ import print_function
@@ -26,89 +25,91 @@ import route_guide_resources
 
 
 def make_route_note(message, latitude, longitude):
-  return route_guide_pb2.RouteNote(
-      message=message,
-      location=route_guide_pb2.Point(latitude=latitude, longitude=longitude))
+    return route_guide_pb2.RouteNote(
+        message=message,
+        location=route_guide_pb2.Point(latitude=latitude, longitude=longitude))
 
 
 def guide_get_one_feature(stub, point):
-  feature = stub.GetFeature(point)
-  if not feature.location:
-    print("Server returned incomplete feature")
-    return
+    feature = stub.GetFeature(point)
+    if not feature.location:
+        print("Server returned incomplete feature")
+        return
 
-  if feature.name:
-    print("Feature called %s at %s" % (feature.name, feature.location))
-  else:
-    print("Found no feature at %s" % feature.location)
+    if feature.name:
+        print("Feature called %s at %s" % (feature.name, feature.location))
+    else:
+        print("Found no feature at %s" % feature.location)
 
 
 def guide_get_feature(stub):
-  guide_get_one_feature(stub, route_guide_pb2.Point(latitude=409146138, longitude=-746188906))
-  guide_get_one_feature(stub, route_guide_pb2.Point(latitude=0, longitude=0))
+    guide_get_one_feature(
+        stub, route_guide_pb2.Point(latitude=409146138, longitude=-746188906))
+    guide_get_one_feature(stub, route_guide_pb2.Point(latitude=0, longitude=0))
 
 
 def guide_list_features(stub):
-  rectangle = route_guide_pb2.Rectangle(
-      lo=route_guide_pb2.Point(latitude=400000000, longitude=-750000000),
-      hi=route_guide_pb2.Point(latitude=420000000, longitude=-730000000))
-  print("Looking for features between 40, -75 and 42, -73")
+    rectangle = route_guide_pb2.Rectangle(
+        lo=route_guide_pb2.Point(latitude=400000000, longitude=-750000000),
+        hi=route_guide_pb2.Point(latitude=420000000, longitude=-730000000))
+    print("Looking for features between 40, -75 and 42, -73")
 
-  features = stub.ListFeatures(rectangle)
+    features = stub.ListFeatures(rectangle)
 
-  for feature in features:
-    print("Feature called %s at %s" % (feature.name, feature.location))
+    for feature in features:
+        print("Feature called %s at %s" % (feature.name, feature.location))
 
 
 def generate_route(feature_list):
-  for _ in range(0, 10):
-    random_feature = feature_list[random.randint(0, len(feature_list) - 1)]
-    print("Visiting point %s" % random_feature.location)
-    yield random_feature.location
+    for _ in range(0, 10):
+        random_feature = feature_list[random.randint(0, len(feature_list) - 1)]
+        print("Visiting point %s" % random_feature.location)
+        yield random_feature.location
 
 
 def guide_record_route(stub):
-  feature_list = route_guide_resources.read_route_guide_database()
+    feature_list = route_guide_resources.read_route_guide_database()
 
-  route_iterator = generate_route(feature_list)
-  route_summary = stub.RecordRoute(route_iterator)
-  print("Finished trip with %s points " % route_summary.point_count)
-  print("Passed %s features " % route_summary.feature_count)
-  print("Travelled %s meters " % route_summary.distance)
-  print("It took %s seconds " % route_summary.elapsed_time)
+    route_iterator = generate_route(feature_list)
+    route_summary = stub.RecordRoute(route_iterator)
+    print("Finished trip with %s points " % route_summary.point_count)
+    print("Passed %s features " % route_summary.feature_count)
+    print("Travelled %s meters " % route_summary.distance)
+    print("It took %s seconds " % route_summary.elapsed_time)
 
 
 def generate_messages():
-  messages = [
-      make_route_note("First message", 0, 0),
-      make_route_note("Second message", 0, 1),
-      make_route_note("Third message", 1, 0),
-      make_route_note("Fourth message", 0, 0),
-      make_route_note("Fifth message", 1, 0),
-  ]
-  for msg in messages:
-    print("Sending %s at %s" % (msg.message, msg.location))
-    yield msg
+    messages = [
+        make_route_note("First message", 0, 0),
+        make_route_note("Second message", 0, 1),
+        make_route_note("Third message", 1, 0),
+        make_route_note("Fourth message", 0, 0),
+        make_route_note("Fifth message", 1, 0),
+    ]
+    for msg in messages:
+        print("Sending %s at %s" % (msg.message, msg.location))
+        yield msg
 
 
 def guide_route_chat(stub):
-  responses = stub.RouteChat(generate_messages())
-  for response in responses:
-    print("Received message %s at %s" % (response.message, response.location))
+    responses = stub.RouteChat(generate_messages())
+    for response in responses:
+        print("Received message %s at %s" %
+              (response.message, response.location))
 
 
 def run():
-  channel = grpc.insecure_channel('localhost:50051')
-  stub = route_guide_pb2_grpc.RouteGuideStub(channel)
-  print("-------------- GetFeature --------------")
-  guide_get_feature(stub)
-  print("-------------- ListFeatures --------------")
-  guide_list_features(stub)
-  print("-------------- RecordRoute --------------")
-  guide_record_route(stub)
-  print("-------------- RouteChat --------------")
-  guide_route_chat(stub)
+    channel = grpc.insecure_channel('localhost:50051')
+    stub = route_guide_pb2_grpc.RouteGuideStub(channel)
+    print("-------------- GetFeature --------------")
+    guide_get_feature(stub)
+    print("-------------- ListFeatures --------------")
+    guide_list_features(stub)
+    print("-------------- RecordRoute --------------")
+    guide_record_route(stub)
+    print("-------------- RouteChat --------------")
+    guide_route_chat(stub)
 
 
 if __name__ == '__main__':
-  run()
+    run()
diff --git a/examples/python/route_guide/route_guide_resources.py b/examples/python/route_guide/route_guide_resources.py
index 0887863660..ace85d6f9d 100644
--- a/examples/python/route_guide/route_guide_resources.py
+++ b/examples/python/route_guide/route_guide_resources.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Common resources used in the gRPC route guide example."""
 
 import json
@@ -20,19 +19,19 @@ import route_guide_pb2
 
 
 def read_route_guide_database():
-  """Reads the route guide database.
+    """Reads the route guide database.
 
   Returns:
     The full contents of the route guide database as a sequence of
       route_guide_pb2.Features.
   """
-  feature_list = []
-  with open("route_guide_db.json") as route_guide_db_file:
-    for item in json.load(route_guide_db_file):
-      feature = route_guide_pb2.Feature(
-          name=item["name"],
-          location=route_guide_pb2.Point(
-              latitude=item["location"]["latitude"],
-              longitude=item["location"]["longitude"]))
-      feature_list.append(feature)
-  return feature_list
+    feature_list = []
+    with open("route_guide_db.json") as route_guide_db_file:
+        for item in json.load(route_guide_db_file):
+            feature = route_guide_pb2.Feature(
+                name=item["name"],
+                location=route_guide_pb2.Point(
+                    latitude=item["location"]["latitude"],
+                    longitude=item["location"]["longitude"]))
+            feature_list.append(feature)
+    return feature_list
diff --git a/examples/python/route_guide/route_guide_server.py b/examples/python/route_guide/route_guide_server.py
index a0aa5fdb83..46f3322a39 100644
--- a/examples/python/route_guide/route_guide_server.py
+++ b/examples/python/route_guide/route_guide_server.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """The Python implementation of the gRPC route guide server."""
 
 from concurrent import futures
@@ -28,98 +27,102 @@ _ONE_DAY_IN_SECONDS = 60 * 60 * 24
 
 
 def get_feature(feature_db, point):
-  """Returns Feature at given location or None."""
-  for feature in feature_db:
-    if feature.location == point:
-      return feature
-  return None
+    """Returns Feature at given location or None."""
+    for feature in feature_db:
+        if feature.location == point:
+            return feature
+    return None
 
 
 def get_distance(start, end):
-  """Distance between two points."""
-  coord_factor = 10000000.0
-  lat_1 = start.latitude / coord_factor
-  lat_2 = end.latitude / coord_factor
-  lon_1 = start.longitude / coord_factor
-  lon_2 = end.longitude / coord_factor
-  lat_rad_1 = math.radians(lat_1)
-  lat_rad_2 = math.radians(lat_2)
-  delta_lat_rad = math.radians(lat_2 - lat_1)
-  delta_lon_rad = math.radians(lon_2 - lon_1)
-
-  a = (pow(math.sin(delta_lat_rad / 2), 2) +
-       (math.cos(lat_rad_1) * math.cos(lat_rad_2) *
-        pow(math.sin(delta_lon_rad / 2), 2)))
-  c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a))
-  R = 6371000; # metres
-  return R * c;
+    """Distance between two points."""
+    coord_factor = 10000000.0
+    lat_1 = start.latitude / coord_factor
+    lat_2 = end.latitude / coord_factor
+    lon_1 = start.longitude / coord_factor
+    lon_2 = end.longitude / coord_factor
+    lat_rad_1 = math.radians(lat_1)
+    lat_rad_2 = math.radians(lat_2)
+    delta_lat_rad = math.radians(lat_2 - lat_1)
+    delta_lon_rad = math.radians(lon_2 - lon_1)
+
+    a = (pow(math.sin(delta_lat_rad / 2), 2) +
+         (math.cos(lat_rad_1) * math.cos(lat_rad_2) * pow(
+             math.sin(delta_lon_rad / 2), 2)))
+    c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a))
+    R = 6371000
+    # metres
+    return R * c
+
 
 class RouteGuideServicer(route_guide_pb2_grpc.RouteGuideServicer):
-  """Provides methods that implement functionality of route guide server."""
-
-  def __init__(self):
-    self.db = route_guide_resources.read_route_guide_database()
-
-  def GetFeature(self, request, context):
-    feature = get_feature(self.db, request)
-    if feature is None:
-      return route_guide_pb2.Feature(name="", location=request)
-    else:
-      return feature
-
-  def ListFeatures(self, request, context):
-    left = min(request.lo.longitude, request.hi.longitude)
-    right = max(request.lo.longitude, request.hi.longitude)
-    top = max(request.lo.latitude, request.hi.latitude)
-    bottom = min(request.lo.latitude, request.hi.latitude)
-    for feature in self.db:
-      if (feature.location.longitude >= left and
-          feature.location.longitude <= right and
-          feature.location.latitude >= bottom and
-          feature.location.latitude <= top):
-        yield feature
-
-  def RecordRoute(self, request_iterator, context):
-    point_count = 0
-    feature_count = 0
-    distance = 0.0
-    prev_point = None
-
-    start_time = time.time()
-    for point in request_iterator:
-      point_count += 1
-      if get_feature(self.db, point):
-        feature_count += 1
-      if prev_point:
-        distance += get_distance(prev_point, point)
-      prev_point = point
-
-    elapsed_time = time.time() - start_time
-    return route_guide_pb2.RouteSummary(point_count=point_count,
-                                        feature_count=feature_count,
-                                        distance=int(distance),
-                                        elapsed_time=int(elapsed_time))
-
-  def RouteChat(self, request_iterator, context):
-    prev_notes = []
-    for new_note in request_iterator:
-      for prev_note in prev_notes:
-        if prev_note.location == new_note.location:
-          yield prev_note
-      prev_notes.append(new_note)
+    """Provides methods that implement functionality of route guide server."""
+
+    def __init__(self):
+        self.db = route_guide_resources.read_route_guide_database()
+
+    def GetFeature(self, request, context):
+        feature = get_feature(self.db, request)
+        if feature is None:
+            return route_guide_pb2.Feature(name="", location=request)
+        else:
+            return feature
+
+    def ListFeatures(self, request, context):
+        left = min(request.lo.longitude, request.hi.longitude)
+        right = max(request.lo.longitude, request.hi.longitude)
+        top = max(request.lo.latitude, request.hi.latitude)
+        bottom = min(request.lo.latitude, request.hi.latitude)
+        for feature in self.db:
+            if (feature.location.longitude >= left and
+                    feature.location.longitude <= right and
+                    feature.location.latitude >= bottom and
+                    feature.location.latitude <= top):
+                yield feature
+
+    def RecordRoute(self, request_iterator, context):
+        point_count = 0
+        feature_count = 0
+        distance = 0.0
+        prev_point = None
+
+        start_time = time.time()
+        for point in request_iterator:
+            point_count += 1
+            if get_feature(self.db, point):
+                feature_count += 1
+            if prev_point:
+                distance += get_distance(prev_point, point)
+            prev_point = point
+
+        elapsed_time = time.time() - start_time
+        return route_guide_pb2.RouteSummary(
+            point_count=point_count,
+            feature_count=feature_count,
+            distance=int(distance),
+            elapsed_time=int(elapsed_time))
+
+    def RouteChat(self, request_iterator, context):
+        prev_notes = []
+        for new_note in request_iterator:
+            for prev_note in prev_notes:
+                if prev_note.location == new_note.location:
+                    yield prev_note
+            prev_notes.append(new_note)
 
 
 def serve():
-  server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
-  route_guide_pb2_grpc.add_RouteGuideServicer_to_server(
-      RouteGuideServicer(), server)
-  server.add_insecure_port('[::]:50051')
-  server.start()
-  try:
-    while True:
-      time.sleep(_ONE_DAY_IN_SECONDS)
-  except KeyboardInterrupt:
-    server.stop(0)
+    server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
+    route_guide_pb2_grpc.add_RouteGuideServicer_to_server(RouteGuideServicer(),
+                                                          server)
+    server.add_insecure_port('[::]:50051')
+    server.start()
+    try:
+        while True:
+            time.sleep(_ONE_DAY_IN_SECONDS)
+    except KeyboardInterrupt:
+        server.stop(0)
+
 
 if __name__ == '__main__':
-  serve()
+    serve()
diff --git a/examples/python/route_guide/run_codegen.py b/examples/python/route_guide/run_codegen.py
index 4b61cf4faa..1ec7fcd51f 100644
--- a/examples/python/route_guide/run_codegen.py
+++ b/examples/python/route_guide/run_codegen.py
@@ -11,17 +11,9 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Runs protoc with the gRPC plugin to generate messages and gRPC stubs."""
 
 from grpc_tools import protoc
 
-protoc.main(
-    (
-	'',
-	'-I../../protos',
-	'--python_out=.',
-	'--grpc_python_out=.',
-	'../../protos/route_guide.proto',
-    )
-)
+protoc.main(('', '-I../../protos', '--python_out=.', '--grpc_python_out=.',
+             '../../protos/route_guide.proto',))
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index 39b848414a..bc4b318cb2 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -34,6 +34,10 @@ Pod::Spec.new do |s|
     :tag => "v#{version}",
   }
 
+  # gRPC podspecs depend on fix for https://github.com/CocoaPods/CocoaPods/issues/6024,
+  # which was released in Cocoapods v1.2.0.
+  s.cocoapods_version = '>= 1.2.0'
+
   s.ios.deployment_target = '7.0'
   s.osx.deployment_target = '10.9'
   s.requires_arc = false
diff --git a/include/grpc++/generic/async_generic_service.h b/include/grpc++/generic/async_generic_service.h
index cd9a65e3cb..b1ea4f3909 100644
--- a/include/grpc++/generic/async_generic_service.h
+++ b/include/grpc++/generic/async_generic_service.h
@@ -42,6 +42,23 @@ class GenericServerContext final : public ServerContext {
   grpc::string host_;
 };
 
+// A generic service at the server side accepts all RPC methods and hosts. It is
+// typically used in proxies. The generic service can be registered to a server
+// which also has other services.
+// Sample usage:
+//   ServerBuilder builder;
+//   auto cq = builder.AddCompletionQueue();
+//   AsyncGenericService generic_service;
+//   builder.RegisterAsyncGeneicService(&generic_service);
+//   auto server = builder.BuildAndStart();
+//
+//   // request a new call
+//   GenericServerContext context;
+//   GenericAsyncReaderWriter stream;
+//   generic_service.RequestCall(&context, &stream, cq.get(), cq.get(), tag);
+//
+// When tag is retrieved from cq->Next(), context.method() can be used to look
+// at the method and the RPC can be handled accordingly.
 class AsyncGenericService final {
  public:
   AsyncGenericService() : server_(nullptr) {}
diff --git a/include/grpc++/impl/codegen/async_unary_call.h b/include/grpc++/impl/codegen/async_unary_call.h
index b9ea5fd19c..fb573004cb 100644
--- a/include/grpc++/impl/codegen/async_unary_call.h
+++ b/include/grpc++/impl/codegen/async_unary_call.h
@@ -103,6 +103,13 @@ class ClientAsyncResponseReader final
     assert(size == sizeof(ClientAsyncResponseReader));
   }
 
+  // This operator should never be called as the memory should be freed as part
+  // of the arena destruction. It only exists to provide a matching operator
+  // delete to the operator new so that some compilers will not complain (see
+  // https://github.com/grpc/grpc/issues/11301) Note at the time of adding this
+  // there are no tests catching the compiler warning.
+  static void operator delete(void*, void*) { assert(0); }
+
   void StartCall() override {
     assert(!started_);
     started_ = true;
diff --git a/include/grpc++/impl/codegen/call.h b/include/grpc++/impl/codegen/call.h
index af2c2b510c..e581049e7f 100644
--- a/include/grpc++/impl/codegen/call.h
+++ b/include/grpc++/impl/codegen/call.h
@@ -558,10 +558,12 @@ class CallOpRecvInitialMetadata {
 
 class CallOpClientRecvStatus {
  public:
-  CallOpClientRecvStatus() : recv_status_(nullptr) {}
+  CallOpClientRecvStatus()
+      : recv_status_(nullptr), debug_error_string_(nullptr) {}
 
   void ClientRecvStatus(ClientContext* context, Status* status) {
-    metadata_map_ = &context->trailing_metadata_;
+    client_context_ = context;
+    metadata_map_ = &client_context_->trailing_metadata_;
     recv_status_ = status;
     error_message_ = g_core_codegen_interface->grpc_empty_slice();
   }
@@ -574,7 +576,7 @@ class CallOpClientRecvStatus {
     op->data.recv_status_on_client.trailing_metadata = metadata_map_->arr();
     op->data.recv_status_on_client.status = &status_code_;
     op->data.recv_status_on_client.status_details = &error_message_;
-    op->data.recv_status_on_client.error_string = nullptr;
+    op->data.recv_status_on_client.error_string = &debug_error_string_;
     op->flags = 0;
     op->reserved = NULL;
   }
@@ -592,13 +594,20 @@ class CallOpClientRecvStatus {
                            grpc::string(GRPC_SLICE_START_PTR(error_message_),
                                         GRPC_SLICE_END_PTR(error_message_)),
                            binary_error_details);
+    client_context_->set_debug_error_string(
+        debug_error_string_ != nullptr ? debug_error_string_ : "");
     g_core_codegen_interface->grpc_slice_unref(error_message_);
+    if (debug_error_string_ != nullptr) {
+      g_core_codegen_interface->gpr_free((void*)debug_error_string_);
+    }
     recv_status_ = nullptr;
   }
 
  private:
+  ClientContext* client_context_;
   MetadataMap* metadata_map_;
   Status* recv_status_;
+  const char* debug_error_string_;
   grpc_status_code status_code_;
   grpc_slice error_message_;
 };
diff --git a/include/grpc++/impl/codegen/client_context.h b/include/grpc++/impl/codegen/client_context.h
index 22b581cbc5..61d97ce818 100644
--- a/include/grpc++/impl/codegen/client_context.h
+++ b/include/grpc++/impl/codegen/client_context.h
@@ -348,6 +348,13 @@ class ClientContext {
   /// Applications never need to call this method.
   grpc_call* c_call() { return call_; }
 
+  /// EXPERIMENTAL debugging API
+  ///
+  /// if status is not ok() for an RPC, this will return a detailed string
+  /// of the gRPC Core error that led to the failure. It should not be relied
+  /// upon for anything other than gaining more debug data in failure cases.
+  grpc::string debug_error_string() const { return debug_error_string_; }
+
  private:
   // Disallow copy and assign.
   ClientContext(const ClientContext&);
@@ -374,6 +381,11 @@ class ClientContext {
   template <class InputMessage, class OutputMessage>
   friend class ::grpc::internal::BlockingUnaryCallImpl;
 
+  // Used by friend class CallOpClientRecvStatus
+  void set_debug_error_string(const grpc::string& debug_error_string) {
+    debug_error_string_ = debug_error_string;
+  }
+
   grpc_call* call() const { return call_; }
   void set_call(grpc_call* call, const std::shared_ptr<Channel>& channel);
 
@@ -412,6 +424,8 @@ class ClientContext {
 
   grpc_compression_algorithm compression_algorithm_;
   bool initial_metadata_corked_;
+
+  grpc::string debug_error_string_;
 };
 
 }  // namespace grpc
diff --git a/include/grpc++/support/channel_arguments.h b/include/grpc++/support/channel_arguments.h
index 9dc505f008..c9879d8a28 100644
--- a/include/grpc++/support/channel_arguments.h
+++ b/include/grpc++/support/channel_arguments.h
@@ -122,7 +122,7 @@ class ChannelArguments {
   /// Default pointer argument operations.
   struct PointerVtableMembers {
     static void* Copy(void* in) { return in; }
-    static void Destroy(grpc_exec_ctx* exec_ctx, void* in) {}
+    static void Destroy(void* in) {}
     static int Compare(void* a, void* b) {
       if (a < b) return -1;
       if (a > b) return 1;
diff --git a/include/grpc/impl/codegen/grpc_types.h b/include/grpc/impl/codegen/grpc_types.h
index 77844aa2af..fcbc8ac5a1 100644
--- a/include/grpc/impl/codegen/grpc_types.h
+++ b/include/grpc/impl/codegen/grpc_types.h
@@ -85,7 +85,7 @@ typedef enum {
 
 typedef struct grpc_arg_pointer_vtable {
   void* (*copy)(void* p);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, void* p);
+  void (*destroy)(void* p);
   int (*cmp)(void* p, void* q);
 } grpc_arg_pointer_vtable;
 
diff --git a/include/grpc/impl/codegen/port_platform.h b/include/grpc/impl/codegen/port_platform.h
index 1906886d5e..5a0ed85111 100644
--- a/include/grpc/impl/codegen/port_platform.h
+++ b/include/grpc/impl/codegen/port_platform.h
@@ -173,6 +173,7 @@
 #endif /* _LP64 */
 #ifdef __GLIBC__
 #define GPR_POSIX_CRASH_HANDLER 1
+#define GPR_LINUX_PTHREAD_NAME 1
 #else /* musl libc */
 #define GPR_MUSL_LIBC_COMPAT 1
 #endif
@@ -195,6 +196,7 @@
 #else /* __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_7 */
 #define GPR_CPU_POSIX 1
 #define GPR_GCC_TLS 1
+#define GPR_APPLE_PTHREAD_NAME 1
 #endif
 #else /* __MAC_OS_X_VERSION_MIN_REQUIRED */
 #define GPR_CPU_POSIX 1
diff --git a/include/grpc/impl/codegen/slice.h b/include/grpc/impl/codegen/slice.h
index 11997fcb56..ad026b685e 100644
--- a/include/grpc/impl/codegen/slice.h
+++ b/include/grpc/impl/codegen/slice.h
@@ -43,7 +43,7 @@ typedef struct grpc_slice grpc_slice;
 
 typedef struct grpc_slice_refcount_vtable {
   void (*ref)(void*);
-  void (*unref)(grpc_exec_ctx* exec_ctx, void*);
+  void (*unref)(void*);
   int (*eq)(grpc_slice a, grpc_slice b);
   uint32_t (*hash)(grpc_slice slice);
 } grpc_slice_refcount_vtable;
diff --git a/include/grpc/slice_buffer.h b/include/grpc/slice_buffer.h
index 6510c151b3..30833d02db 100644
--- a/include/grpc/slice_buffer.h
+++ b/include/grpc/slice_buffer.h
@@ -67,8 +67,7 @@ GPRAPI void grpc_slice_buffer_move_first_no_ref(grpc_slice_buffer* src,
                                                 size_t n,
                                                 grpc_slice_buffer* dst);
 /** move the first n bytes of src into dst (copying them) */
-GPRAPI void grpc_slice_buffer_move_first_into_buffer(grpc_exec_ctx* exec_ctx,
-                                                     grpc_slice_buffer* src,
+GPRAPI void grpc_slice_buffer_move_first_into_buffer(grpc_slice_buffer* src,
                                                      size_t n, void* dst);
 /** take the first slice in the slice buffer */
 GPRAPI grpc_slice grpc_slice_buffer_take_first(grpc_slice_buffer* src);
diff --git a/include/grpc/support/log.h b/include/grpc/support/log.h
index 9cce4b1ae7..a8371cbd48 100644
--- a/include/grpc/support/log.h
+++ b/include/grpc/support/log.h
@@ -73,12 +73,14 @@ GPRAPI void gpr_log_verbosity_init(void);
 /** Log overrides: applications can use this API to intercept logging calls
    and use their own implementations */
 
-typedef struct {
+struct gpr_log_func_args {
   const char* file;
   int line;
   gpr_log_severity severity;
   const char* message;
-} gpr_log_func_args;
+};
+
+typedef struct gpr_log_func_args gpr_log_func_args;
 
 typedef void (*gpr_log_func)(gpr_log_func_args* args);
 GPRAPI void gpr_set_log_function(gpr_log_func func);
diff --git a/include/grpc/support/thd.h b/include/grpc/support/thd.h
index 225d9d6c75..e9444e88c9 100644
--- a/include/grpc/support/thd.h
+++ b/include/grpc/support/thd.h
@@ -42,9 +42,12 @@ typedef struct {
 
 /** Create a new thread running (*thd_body)(arg) and place its thread identifier
    in *t, and return true.  If there are insufficient resources, return false.
+   thd_name is the name of the thread for identification purposes on platforms
+   that support thread naming.
    If options==NULL, default options are used.
    The thread is immediately runnable, and exits when (*thd_body)() returns.  */
-GPRAPI int gpr_thd_new(gpr_thd_id* t, void (*thd_body)(void* arg), void* arg,
+GPRAPI int gpr_thd_new(gpr_thd_id* t, const char* thd_name,
+                       void (*thd_body)(void* arg), void* arg,
                        const gpr_thd_options* options);
 
 /** Return a gpr_thd_options struct with all fields set to defaults. */
diff --git a/include/grpc/support/tls.h b/include/grpc/support/tls.h
index 8519a8350b..4c9e79b6cf 100644
--- a/include/grpc/support/tls.h
+++ b/include/grpc/support/tls.h
@@ -32,6 +32,12 @@
      GPR_TLS_DECL(foo);
    Thread locals always have static scope.
 
+   Declaring a thread local class variable 'foo':
+     GPR_TLS_CLASS_DECL(foo);
+
+   Defining the thread local class variable:
+     GPR_TLS_CLASS_DEF(foo);
+
    Initializing a thread local (must be done at library initialization
    time):
      gpr_tls_init(&foo);
diff --git a/include/grpc/support/tls_gcc.h b/include/grpc/support/tls_gcc.h
index 1b91d22be1..b44f0f1c8c 100644
--- a/include/grpc/support/tls_gcc.h
+++ b/include/grpc/support/tls_gcc.h
@@ -33,6 +33,11 @@ struct gpr_gcc_thread_local {
 #define GPR_TLS_DECL(name) \
   static __thread struct gpr_gcc_thread_local name = {0}
 
+#define GPR_TLS_CLASS_DECL(name) \
+  static __thread struct gpr_gcc_thread_local name
+
+#define GPR_TLS_CLASS_DEF(name) __thread struct gpr_gcc_thread_local name = {0}
+
 #define gpr_tls_init(tls) \
   do {                    \
   } while (0)
diff --git a/include/grpc/support/tls_msvc.h b/include/grpc/support/tls_msvc.h
index e5f2205fc1..68a411f5d4 100644
--- a/include/grpc/support/tls_msvc.h
+++ b/include/grpc/support/tls_msvc.h
@@ -26,9 +26,18 @@ struct gpr_msvc_thread_local {
   intptr_t value;
 };
 
+/** Use GPR_TLS_DECL to declare tls static variables outside a class */
 #define GPR_TLS_DECL(name) \
   static __declspec(thread) struct gpr_msvc_thread_local name = {0}
 
+/** Use GPR_TLS_CLASS_DECL to declare tls static variable members of a class.
+ *  GPR_TLS_CLASS_DEF needs to be called to define this member. */
+#define GPR_TLS_CLASS_DECL(name) \
+  static __declspec(thread) struct gpr_msvc_thread_local name
+
+#define GPR_TLS_CLASS_DEF(name) \
+  __declspec(thread) struct gpr_msvc_thread_local name = {0}
+
 #define gpr_tls_init(tls) \
   do {                    \
   } while (0)
diff --git a/include/grpc/support/tls_pthread.h b/include/grpc/support/tls_pthread.h
index fb0edd8e74..249c8b16f8 100644
--- a/include/grpc/support/tls_pthread.h
+++ b/include/grpc/support/tls_pthread.h
@@ -29,8 +29,17 @@ struct gpr_pthread_thread_local {
   pthread_key_t key;
 };
 
+/** Use GPR_TLS_DECL to declare tls static variables outside a class */
 #define GPR_TLS_DECL(name) static struct gpr_pthread_thread_local name = {0}
 
+/** Use GPR_TLS_CLASS_DECL to declare tls static variable members of a class.
+ *  GPR_TLS_CLASS_DEF needs to be called to define this member. */
+#define GPR_TLS_CLASS_DECL(name) static struct gpr_pthread_thread_local name
+
+/** Use GPR_TLS_CLASS_DEF to declare tls static variable members of a class.
+ *  GPR_TLS_CLASS_DEF needs to be called to define this member. */
+#define GPR_TLS_CLASS_DEF(name) struct gpr_pthread_thread_local name = {0}
+
 #define gpr_tls_init(tls) GPR_ASSERT(0 == pthread_key_create(&(tls)->key, NULL))
 #define gpr_tls_destroy(tls) pthread_key_delete((tls)->key)
 #define gpr_tls_get(tls) ((intptr_t)pthread_getspecific((tls)->key))
diff --git a/src/compiler/csharp_generator.cc b/src/compiler/csharp_generator.cc
index 40fe0b054a..7c97056402 100644
--- a/src/compiler/csharp_generator.cc
+++ b/src/compiler/csharp_generator.cc
@@ -659,8 +659,11 @@ grpc::string GetServices(const FileDescriptor* file, bool generate_client,
     }
 
     // Write out a file header.
-    out.Print("// Generated by the protocol buffer compiler.  DO NOT EDIT!\n");
-    out.Print("// source: $filename$\n", "filename", file->name());
+    out.Print("// <auto-generated>\n");
+    out.Print(
+        "//     Generated by the protocol buffer compiler.  DO NOT EDIT!\n");
+    out.Print("//     source: $filename$\n", "filename", file->name());
+    out.Print("// </auto-generated>\n");
 
     // use C++ style as there are no file-level XML comments in .NET
     grpc::string leading_comments = GetCsharpComments(file, true);
diff --git a/src/core/ext/filters/client_channel/backup_poller.cc b/src/core/ext/filters/client_channel/backup_poller.cc
index ed437d255c..bfc549e709 100644
--- a/src/core/ext/filters/client_channel/backup_poller.cc
+++ b/src/core/ext/filters/client_channel/backup_poller.cc
@@ -69,61 +69,62 @@ static void init_globals() {
   gpr_free(env);
 }
 
-static void backup_poller_shutdown_unref(grpc_exec_ctx* exec_ctx,
-                                         backup_poller* p) {
+static void backup_poller_shutdown_unref(backup_poller* p) {
   if (gpr_unref(&p->shutdown_refs)) {
-    grpc_pollset_destroy(exec_ctx, p->pollset);
+    grpc_pollset_destroy(p->pollset);
     gpr_free(p->pollset);
     gpr_free(p);
   }
 }
 
-static void done_poller(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
-  backup_poller_shutdown_unref(exec_ctx, (backup_poller*)arg);
+static void done_poller(void* arg, grpc_error* error) {
+  backup_poller_shutdown_unref((backup_poller*)arg);
 }
 
-static void g_poller_unref(grpc_exec_ctx* exec_ctx) {
+static void g_poller_unref() {
+  gpr_mu_lock(&g_poller_mu);
   if (gpr_unref(&g_poller->refs)) {
-    gpr_mu_lock(&g_poller_mu);
     backup_poller* p = g_poller;
     g_poller = nullptr;
     gpr_mu_unlock(&g_poller_mu);
     gpr_mu_lock(p->pollset_mu);
     p->shutting_down = true;
-    grpc_pollset_shutdown(exec_ctx, p->pollset,
-                          GRPC_CLOSURE_INIT(&p->shutdown_closure, done_poller,
-                                            p, grpc_schedule_on_exec_ctx));
+    grpc_pollset_shutdown(
+        p->pollset, GRPC_CLOSURE_INIT(&p->shutdown_closure, done_poller, p,
+                                      grpc_schedule_on_exec_ctx));
     gpr_mu_unlock(p->pollset_mu);
-    grpc_timer_cancel(exec_ctx, &p->polling_timer);
+    grpc_timer_cancel(&p->polling_timer);
+  } else {
+    gpr_mu_unlock(&g_poller_mu);
   }
 }
 
-static void run_poller(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void run_poller(void* arg, grpc_error* error) {
   backup_poller* p = (backup_poller*)arg;
   if (error != GRPC_ERROR_NONE) {
     if (error != GRPC_ERROR_CANCELLED) {
       GRPC_LOG_IF_ERROR("run_poller", GRPC_ERROR_REF(error));
     }
-    backup_poller_shutdown_unref(exec_ctx, p);
+    backup_poller_shutdown_unref(p);
     return;
   }
   gpr_mu_lock(p->pollset_mu);
   if (p->shutting_down) {
     gpr_mu_unlock(p->pollset_mu);
-    backup_poller_shutdown_unref(exec_ctx, p);
+    backup_poller_shutdown_unref(p);
     return;
   }
-  grpc_error* err = grpc_pollset_work(exec_ctx, p->pollset, nullptr,
-                                      grpc_exec_ctx_now(exec_ctx));
+  grpc_error* err =
+      grpc_pollset_work(p->pollset, nullptr, grpc_core::ExecCtx::Get()->Now());
   gpr_mu_unlock(p->pollset_mu);
   GRPC_LOG_IF_ERROR("Run client channel backup poller", err);
-  grpc_timer_init(exec_ctx, &p->polling_timer,
-                  grpc_exec_ctx_now(exec_ctx) + g_poll_interval_ms,
+  grpc_timer_init(&p->polling_timer,
+                  grpc_core::ExecCtx::Get()->Now() + g_poll_interval_ms,
                   &p->run_poller_closure);
 }
 
 void grpc_client_channel_start_backup_polling(
-    grpc_exec_ctx* exec_ctx, grpc_pollset_set* interested_parties) {
+    grpc_pollset_set* interested_parties) {
   gpr_once_init(&g_once, init_globals);
   if (g_poll_interval_ms == 0) {
     return;
@@ -139,8 +140,8 @@ void grpc_client_channel_start_backup_polling(
     gpr_ref_init(&g_poller->shutdown_refs, 2);
     GRPC_CLOSURE_INIT(&g_poller->run_poller_closure, run_poller, g_poller,
                       grpc_schedule_on_exec_ctx);
-    grpc_timer_init(exec_ctx, &g_poller->polling_timer,
-                    grpc_exec_ctx_now(exec_ctx) + g_poll_interval_ms,
+    grpc_timer_init(&g_poller->polling_timer,
+                    grpc_core::ExecCtx::Get()->Now() + g_poll_interval_ms,
                     &g_poller->run_poller_closure);
   }
 
@@ -152,14 +153,14 @@ void grpc_client_channel_start_backup_polling(
   grpc_pollset* pollset = g_poller->pollset;
   gpr_mu_unlock(&g_poller_mu);
 
-  grpc_pollset_set_add_pollset(exec_ctx, interested_parties, pollset);
+  grpc_pollset_set_add_pollset(interested_parties, pollset);
 }
 
 void grpc_client_channel_stop_backup_polling(
-    grpc_exec_ctx* exec_ctx, grpc_pollset_set* interested_parties) {
+    grpc_pollset_set* interested_parties) {
   if (g_poll_interval_ms == 0) {
     return;
   }
-  grpc_pollset_set_del_pollset(exec_ctx, interested_parties, g_poller->pollset);
-  g_poller_unref(exec_ctx);
+  grpc_pollset_set_del_pollset(interested_parties, g_poller->pollset);
+  g_poller_unref();
 }
diff --git a/src/core/ext/filters/client_channel/backup_poller.h b/src/core/ext/filters/client_channel/backup_poller.h
index e993d50639..551e0331dc 100644
--- a/src/core/ext/filters/client_channel/backup_poller.h
+++ b/src/core/ext/filters/client_channel/backup_poller.h
@@ -25,10 +25,10 @@
 
 /* Start polling \a interested_parties periodically in the timer thread  */
 void grpc_client_channel_start_backup_polling(
-    grpc_exec_ctx* exec_ctx, grpc_pollset_set* interested_parties);
+    grpc_pollset_set* interested_parties);
 
 /* Stop polling \a interested_parties */
 void grpc_client_channel_stop_backup_polling(
-    grpc_exec_ctx* exec_ctx, grpc_pollset_set* interested_parties);
+    grpc_pollset_set* interested_parties);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_BACKUP_POLLER_H */
diff --git a/src/core/ext/filters/client_channel/channel_connectivity.cc b/src/core/ext/filters/client_channel/channel_connectivity.cc
index 7eaf5d98cd..20693ba419 100644
--- a/src/core/ext/filters/client_channel/channel_connectivity.cc
+++ b/src/core/ext/filters/client_channel/channel_connectivity.cc
@@ -33,22 +33,22 @@ grpc_connectivity_state grpc_channel_check_connectivity_state(
   /* forward through to the underlying client channel */
   grpc_channel_element* client_channel_elem =
       grpc_channel_stack_last_element(grpc_channel_get_channel_stack(channel));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_connectivity_state state;
   GRPC_API_TRACE(
       "grpc_channel_check_connectivity_state(channel=%p, try_to_connect=%d)", 2,
       (channel, try_to_connect));
   if (client_channel_elem->filter == &grpc_client_channel_filter) {
-    state = grpc_client_channel_check_connectivity_state(
-        &exec_ctx, client_channel_elem, try_to_connect);
-    grpc_exec_ctx_finish(&exec_ctx);
+    state = grpc_client_channel_check_connectivity_state(client_channel_elem,
+                                                         try_to_connect);
+
     return state;
   }
   gpr_log(GPR_ERROR,
           "grpc_channel_check_connectivity_state called on something that is "
           "not a client channel, but '%s'",
           client_channel_elem->filter->name);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return GRPC_CHANNEL_SHUTDOWN;
 }
 
@@ -73,12 +73,11 @@ typedef struct {
   void* tag;
 } state_watcher;
 
-static void delete_state_watcher(grpc_exec_ctx* exec_ctx, state_watcher* w) {
+static void delete_state_watcher(state_watcher* w) {
   grpc_channel_element* client_channel_elem = grpc_channel_stack_last_element(
       grpc_channel_get_channel_stack(w->channel));
   if (client_channel_elem->filter == &grpc_client_channel_filter) {
-    GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, w->channel,
-                                "watch_channel_connectivity");
+    GRPC_CHANNEL_INTERNAL_UNREF(w->channel, "watch_channel_connectivity");
   } else {
     abort();
   }
@@ -86,8 +85,7 @@ static void delete_state_watcher(grpc_exec_ctx* exec_ctx, state_watcher* w) {
   gpr_free(w);
 }
 
-static void finished_completion(grpc_exec_ctx* exec_ctx, void* pw,
-                                grpc_cq_completion* ignored) {
+static void finished_completion(void* pw, grpc_cq_completion* ignored) {
   bool should_delete = false;
   state_watcher* w = (state_watcher*)pw;
   gpr_mu_lock(&w->mu);
@@ -102,19 +100,19 @@ static void finished_completion(grpc_exec_ctx* exec_ctx, void* pw,
   gpr_mu_unlock(&w->mu);
 
   if (should_delete) {
-    delete_state_watcher(exec_ctx, w);
+    delete_state_watcher(w);
   }
 }
 
-static void partly_done(grpc_exec_ctx* exec_ctx, state_watcher* w,
-                        bool due_to_completion, grpc_error* error) {
+static void partly_done(state_watcher* w, bool due_to_completion,
+                        grpc_error* error) {
   if (due_to_completion) {
-    grpc_timer_cancel(exec_ctx, &w->alarm);
+    grpc_timer_cancel(&w->alarm);
   } else {
     grpc_channel_element* client_channel_elem = grpc_channel_stack_last_element(
         grpc_channel_get_channel_stack(w->channel));
     grpc_client_channel_watch_connectivity_state(
-        exec_ctx, client_channel_elem,
+        client_channel_elem,
         grpc_polling_entity_create_from_pollset(grpc_cq_pollset(w->cq)),
         nullptr, &w->on_complete, nullptr);
   }
@@ -149,7 +147,7 @@ static void partly_done(grpc_exec_ctx* exec_ctx, state_watcher* w,
         w->error = error;
       }
       w->phase = CALLING_BACK_AND_FINISHED;
-      grpc_cq_end_op(exec_ctx, w->cq, w->tag, w->error, finished_completion, w,
+      grpc_cq_end_op(w->cq, w->tag, w->error, finished_completion, w,
                      &w->completion_storage);
       break;
     case CALLING_BACK_AND_FINISHED:
@@ -161,14 +159,12 @@ static void partly_done(grpc_exec_ctx* exec_ctx, state_watcher* w,
   GRPC_ERROR_UNREF(error);
 }
 
-static void watch_complete(grpc_exec_ctx* exec_ctx, void* pw,
-                           grpc_error* error) {
-  partly_done(exec_ctx, (state_watcher*)pw, true, GRPC_ERROR_REF(error));
+static void watch_complete(void* pw, grpc_error* error) {
+  partly_done((state_watcher*)pw, true, GRPC_ERROR_REF(error));
 }
 
-static void timeout_complete(grpc_exec_ctx* exec_ctx, void* pw,
-                             grpc_error* error) {
-  partly_done(exec_ctx, (state_watcher*)pw, false, GRPC_ERROR_REF(error));
+static void timeout_complete(void* pw, grpc_error* error) {
+  partly_done((state_watcher*)pw, false, GRPC_ERROR_REF(error));
 }
 
 int grpc_channel_num_external_connectivity_watchers(grpc_channel* channel) {
@@ -183,12 +179,10 @@ typedef struct watcher_timer_init_arg {
   gpr_timespec deadline;
 } watcher_timer_init_arg;
 
-static void watcher_timer_init(grpc_exec_ctx* exec_ctx, void* arg,
-                               grpc_error* error_ignored) {
+static void watcher_timer_init(void* arg, grpc_error* error_ignored) {
   watcher_timer_init_arg* wa = (watcher_timer_init_arg*)arg;
 
-  grpc_timer_init(exec_ctx, &wa->w->alarm,
-                  grpc_timespec_to_millis_round_up(wa->deadline),
+  grpc_timer_init(&wa->w->alarm, grpc_timespec_to_millis_round_up(wa->deadline),
                   &wa->w->on_timeout);
   gpr_free(wa);
 }
@@ -204,7 +198,7 @@ void grpc_channel_watch_connectivity_state(
     gpr_timespec deadline, grpc_completion_queue* cq, void* tag) {
   grpc_channel_element* client_channel_elem =
       grpc_channel_stack_last_element(grpc_channel_get_channel_stack(channel));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   state_watcher* w = (state_watcher*)gpr_malloc(sizeof(*w));
 
   GRPC_API_TRACE(
@@ -241,12 +235,10 @@ void grpc_channel_watch_connectivity_state(
   if (client_channel_elem->filter == &grpc_client_channel_filter) {
     GRPC_CHANNEL_INTERNAL_REF(channel, "watch_channel_connectivity");
     grpc_client_channel_watch_connectivity_state(
-        &exec_ctx, client_channel_elem,
+        client_channel_elem,
         grpc_polling_entity_create_from_pollset(grpc_cq_pollset(cq)), &w->state,
         &w->on_complete, &w->watcher_timer_init);
   } else {
     abort();
   }
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
diff --git a/src/core/ext/filters/client_channel/client_channel.cc b/src/core/ext/filters/client_channel/client_channel.cc
index aced9adf9f..e99022a91b 100644
--- a/src/core/ext/filters/client_channel/client_channel.cc
+++ b/src/core/ext/filters/client_channel/client_channel.cc
@@ -91,8 +91,7 @@ static void method_parameters_unref(method_parameters* method_params) {
 static void* method_parameters_ref_wrapper(void* value) {
   return method_parameters_ref((method_parameters*)value);
 }
-static void method_parameters_unref_wrapper(grpc_exec_ctx* exec_ctx,
-                                            void* value) {
+static void method_parameters_unref_wrapper(void* value) {
   method_parameters_unref((method_parameters*)value);
 }
 
@@ -228,12 +227,11 @@ typedef struct {
   grpc_lb_policy* lb_policy;
 } lb_policy_connectivity_watcher;
 
-static void watch_lb_policy_locked(grpc_exec_ctx* exec_ctx, channel_data* chand,
+static void watch_lb_policy_locked(channel_data* chand,
                                    grpc_lb_policy* lb_policy,
                                    grpc_connectivity_state current_state);
 
-static void set_channel_connectivity_state_locked(grpc_exec_ctx* exec_ctx,
-                                                  channel_data* chand,
+static void set_channel_connectivity_state_locked(channel_data* chand,
                                                   grpc_connectivity_state state,
                                                   grpc_error* error,
                                                   const char* reason) {
@@ -245,12 +243,12 @@ static void set_channel_connectivity_state_locked(grpc_exec_ctx* exec_ctx,
     if (state == GRPC_CHANNEL_TRANSIENT_FAILURE) {
       /* cancel picks with wait_for_ready=false */
       grpc_lb_policy_cancel_picks_locked(
-          exec_ctx, chand->lb_policy,
+          chand->lb_policy,
           /* mask= */ GRPC_INITIAL_METADATA_WAIT_FOR_READY,
           /* check= */ 0, GRPC_ERROR_REF(error));
     } else if (state == GRPC_CHANNEL_SHUTDOWN) {
       /* cancel all picks */
-      grpc_lb_policy_cancel_picks_locked(exec_ctx, chand->lb_policy,
+      grpc_lb_policy_cancel_picks_locked(chand->lb_policy,
                                          /* mask= */ 0, /* check= */ 0,
                                          GRPC_ERROR_REF(error));
     }
@@ -259,12 +257,10 @@ static void set_channel_connectivity_state_locked(grpc_exec_ctx* exec_ctx,
     gpr_log(GPR_DEBUG, "chand=%p: setting connectivity state to %s", chand,
             grpc_connectivity_state_name(state));
   }
-  grpc_connectivity_state_set(exec_ctx, &chand->state_tracker, state, error,
-                              reason);
+  grpc_connectivity_state_set(&chand->state_tracker, state, error, reason);
 }
 
-static void on_lb_policy_state_changed_locked(grpc_exec_ctx* exec_ctx,
-                                              void* arg, grpc_error* error) {
+static void on_lb_policy_state_changed_locked(void* arg, grpc_error* error) {
   lb_policy_connectivity_watcher* w = (lb_policy_connectivity_watcher*)arg;
   /* check if the notification is for the latest policy */
   if (w->lb_policy == w->chand->lb_policy) {
@@ -272,17 +268,17 @@ static void on_lb_policy_state_changed_locked(grpc_exec_ctx* exec_ctx,
       gpr_log(GPR_DEBUG, "chand=%p: lb_policy=%p state changed to %s", w->chand,
               w->lb_policy, grpc_connectivity_state_name(w->state));
     }
-    set_channel_connectivity_state_locked(exec_ctx, w->chand, w->state,
+    set_channel_connectivity_state_locked(w->chand, w->state,
                                           GRPC_ERROR_REF(error), "lb_changed");
     if (w->state != GRPC_CHANNEL_SHUTDOWN) {
-      watch_lb_policy_locked(exec_ctx, w->chand, w->lb_policy, w->state);
+      watch_lb_policy_locked(w->chand, w->lb_policy, w->state);
     }
   }
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, w->chand->owning_stack, "watch_lb_policy");
+  GRPC_CHANNEL_STACK_UNREF(w->chand->owning_stack, "watch_lb_policy");
   gpr_free(w);
 }
 
-static void watch_lb_policy_locked(grpc_exec_ctx* exec_ctx, channel_data* chand,
+static void watch_lb_policy_locked(channel_data* chand,
                                    grpc_lb_policy* lb_policy,
                                    grpc_connectivity_state current_state) {
   lb_policy_connectivity_watcher* w =
@@ -293,19 +289,18 @@ static void watch_lb_policy_locked(grpc_exec_ctx* exec_ctx, channel_data* chand,
                     grpc_combiner_scheduler(chand->combiner));
   w->state = current_state;
   w->lb_policy = lb_policy;
-  grpc_lb_policy_notify_on_state_change_locked(exec_ctx, lb_policy, &w->state,
+  grpc_lb_policy_notify_on_state_change_locked(lb_policy, &w->state,
                                                &w->on_changed);
 }
 
-static void start_resolving_locked(grpc_exec_ctx* exec_ctx,
-                                   channel_data* chand) {
+static void start_resolving_locked(channel_data* chand) {
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG, "chand=%p: starting name resolution", chand);
   }
   GPR_ASSERT(!chand->started_resolving);
   chand->started_resolving = true;
   GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver");
-  grpc_resolver_next_locked(exec_ctx, chand->resolver, &chand->resolver_result,
+  grpc_resolver_next_locked(chand->resolver, &chand->resolver_result,
                             &chand->on_resolver_result_changed);
 }
 
@@ -369,29 +364,26 @@ static void parse_retry_throttle_params(const grpc_json* field, void* arg) {
   }
 }
 
-static void request_reresolution_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void request_reresolution_locked(void* arg, grpc_error* error) {
   reresolution_request_args* args = (reresolution_request_args*)arg;
   channel_data* chand = args->chand;
   // If this invocation is for a stale LB policy, treat it as an LB shutdown
   // signal.
   if (args->lb_policy != chand->lb_policy || error != GRPC_ERROR_NONE ||
       chand->resolver == nullptr) {
-    GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->owning_stack, "re-resolution");
+    GRPC_CHANNEL_STACK_UNREF(chand->owning_stack, "re-resolution");
     gpr_free(args);
     return;
   }
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG, "chand=%p: started name re-resolving", chand);
   }
-  grpc_resolver_channel_saw_error_locked(exec_ctx, chand->resolver);
+  grpc_resolver_channel_saw_error_locked(chand->resolver);
   // Give back the closure to the LB policy.
-  grpc_lb_policy_set_reresolve_closure_locked(exec_ctx, chand->lb_policy,
-                                              &args->closure);
+  grpc_lb_policy_set_reresolve_closure_locked(chand->lb_policy, &args->closure);
 }
 
-static void on_resolver_result_changed_locked(grpc_exec_ctx* exec_ctx,
-                                              void* arg, grpc_error* error) {
+static void on_resolver_result_changed_locked(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG, "chand=%p: got resolver result: error=%s", chand,
@@ -458,12 +450,10 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx* exec_ctx,
       if (chand->lb_policy != nullptr && !lb_policy_name_changed) {
         // Continue using the same LB policy.  Update with new addresses.
         lb_policy_updated = true;
-        grpc_lb_policy_update_locked(exec_ctx, chand->lb_policy,
-                                     &lb_policy_args);
+        grpc_lb_policy_update_locked(chand->lb_policy, &lb_policy_args);
       } else {
         // Instantiate new LB policy.
-        new_lb_policy =
-            grpc_lb_policy_create(exec_ctx, lb_policy_name, &lb_policy_args);
+        new_lb_policy = grpc_lb_policy_create(lb_policy_name, &lb_policy_args);
         if (new_lb_policy == nullptr) {
           gpr_log(GPR_ERROR, "could not create LB policy \"%s\"",
                   lb_policy_name);
@@ -475,7 +465,7 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx* exec_ctx,
           GRPC_CLOSURE_INIT(&args->closure, request_reresolution_locked, args,
                             grpc_combiner_scheduler(chand->combiner));
           GRPC_CHANNEL_STACK_REF(chand->owning_stack, "re-resolution");
-          grpc_lb_policy_set_reresolve_closure_locked(exec_ctx, new_lb_policy,
+          grpc_lb_policy_set_reresolve_closure_locked(new_lb_policy,
                                                       &args->closure);
         }
       }
@@ -492,8 +482,7 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx* exec_ctx,
                                                GRPC_ARG_SERVER_URI);
           GPR_ASSERT(channel_arg != nullptr);
           GPR_ASSERT(channel_arg->type == GRPC_ARG_STRING);
-          grpc_uri* uri =
-              grpc_uri_parse(exec_ctx, channel_arg->value.string, true);
+          grpc_uri* uri = grpc_uri_parse(channel_arg->value.string, true);
           GPR_ASSERT(uri->path[0] != '\0');
           service_config_parsing_state parsing_state;
           memset(&parsing_state, 0, sizeof(parsing_state));
@@ -504,7 +493,7 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx* exec_ctx,
           grpc_uri_destroy(uri);
           retry_throttle_data = parsing_state.retry_throttle_data;
           method_params_table = grpc_service_config_create_method_config_table(
-              exec_ctx, service_config, method_parameters_create_from_json,
+              service_config, method_parameters_create_from_json,
               method_parameters_ref_wrapper, method_parameters_unref_wrapper);
           grpc_service_config_destroy(service_config);
         }
@@ -514,7 +503,7 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx* exec_ctx,
       // The copy will be saved in chand->lb_policy_name below.
       lb_policy_name_dup = gpr_strdup(lb_policy_name);
     }
-    grpc_channel_args_destroy(exec_ctx, chand->resolver_result);
+    grpc_channel_args_destroy(chand->resolver_result);
     chand->resolver_result = nullptr;
   }
   if (grpc_client_channel_trace.enabled()) {
@@ -546,7 +535,7 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx* exec_ctx,
   chand->retry_throttle_data = retry_throttle_data;
   // Swap out the method params table.
   if (chand->method_params_table != nullptr) {
-    grpc_slice_hash_table_unref(exec_ctx, chand->method_params_table);
+    grpc_slice_hash_table_unref(chand->method_params_table);
   }
   chand->method_params_table = method_params_table;
   // If we have a new LB policy or are shutting down (in which case
@@ -562,10 +551,9 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx* exec_ctx,
         gpr_log(GPR_DEBUG, "chand=%p: unreffing lb_policy=%p", chand,
                 chand->lb_policy);
       }
-      grpc_pollset_set_del_pollset_set(exec_ctx,
-                                       chand->lb_policy->interested_parties,
+      grpc_pollset_set_del_pollset_set(chand->lb_policy->interested_parties,
                                        chand->interested_parties);
-      GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel");
+      GRPC_LB_POLICY_UNREF(chand->lb_policy, "channel");
     }
     chand->lb_policy = new_lb_policy;
   }
@@ -579,21 +567,20 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx* exec_ctx,
       if (grpc_client_channel_trace.enabled()) {
         gpr_log(GPR_DEBUG, "chand=%p: shutting down resolver", chand);
       }
-      grpc_resolver_shutdown_locked(exec_ctx, chand->resolver);
-      GRPC_RESOLVER_UNREF(exec_ctx, chand->resolver, "channel");
+      grpc_resolver_shutdown_locked(chand->resolver);
+      GRPC_RESOLVER_UNREF(chand->resolver, "channel");
       chand->resolver = nullptr;
     }
     set_channel_connectivity_state_locked(
-        exec_ctx, chand, GRPC_CHANNEL_SHUTDOWN,
+        chand, GRPC_CHANNEL_SHUTDOWN,
         GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
             "Got resolver result after disconnection", &error, 1),
         "resolver_gone");
-    GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->owning_stack, "resolver");
+    GRPC_CHANNEL_STACK_UNREF(chand->owning_stack, "resolver");
     grpc_closure_list_fail_all(&chand->waiting_for_resolver_result_closures,
                                GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                                    "Channel disconnected", &error, 1));
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx,
-                            &chand->waiting_for_resolver_result_closures);
+    GRPC_CLOSURE_LIST_SCHED(&chand->waiting_for_resolver_result_closures);
   } else {  // Not shutting down.
     grpc_connectivity_state state = GRPC_CHANNEL_TRANSIENT_FAILURE;
     grpc_error* state_error =
@@ -603,33 +590,28 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx* exec_ctx,
         gpr_log(GPR_DEBUG, "chand=%p: initializing new LB policy", chand);
       }
       GRPC_ERROR_UNREF(state_error);
-      state = grpc_lb_policy_check_connectivity_locked(exec_ctx, new_lb_policy,
-                                                       &state_error);
-      grpc_pollset_set_add_pollset_set(exec_ctx,
-                                       new_lb_policy->interested_parties,
+      state =
+          grpc_lb_policy_check_connectivity_locked(new_lb_policy, &state_error);
+      grpc_pollset_set_add_pollset_set(new_lb_policy->interested_parties,
                                        chand->interested_parties);
-      GRPC_CLOSURE_LIST_SCHED(exec_ctx,
-                              &chand->waiting_for_resolver_result_closures);
+      GRPC_CLOSURE_LIST_SCHED(&chand->waiting_for_resolver_result_closures);
       if (chand->exit_idle_when_lb_policy_arrives) {
-        grpc_lb_policy_exit_idle_locked(exec_ctx, new_lb_policy);
+        grpc_lb_policy_exit_idle_locked(new_lb_policy);
         chand->exit_idle_when_lb_policy_arrives = false;
       }
-      watch_lb_policy_locked(exec_ctx, chand, new_lb_policy, state);
+      watch_lb_policy_locked(chand, new_lb_policy, state);
     }
     if (!lb_policy_updated) {
-      set_channel_connectivity_state_locked(exec_ctx, chand, state,
-                                            GRPC_ERROR_REF(state_error),
-                                            "new_lb+resolver");
+      set_channel_connectivity_state_locked(
+          chand, state, GRPC_ERROR_REF(state_error), "new_lb+resolver");
     }
-    grpc_resolver_next_locked(exec_ctx, chand->resolver,
-                              &chand->resolver_result,
+    grpc_resolver_next_locked(chand->resolver, &chand->resolver_result,
                               &chand->on_resolver_result_changed);
     GRPC_ERROR_UNREF(state_error);
   }
 }
 
-static void start_transport_op_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_error* error_ignored) {
+static void start_transport_op_locked(void* arg, grpc_error* error_ignored) {
   grpc_transport_op* op = (grpc_transport_op*)arg;
   grpc_channel_element* elem =
       (grpc_channel_element*)op->handler_private.extra_arg;
@@ -637,75 +619,74 @@ static void start_transport_op_locked(grpc_exec_ctx* exec_ctx, void* arg,
 
   if (op->on_connectivity_state_change != nullptr) {
     grpc_connectivity_state_notify_on_state_change(
-        exec_ctx, &chand->state_tracker, op->connectivity_state,
+        &chand->state_tracker, op->connectivity_state,
         op->on_connectivity_state_change);
     op->on_connectivity_state_change = nullptr;
     op->connectivity_state = nullptr;
   }
 
-  if (op->send_ping != nullptr) {
+  if (op->send_ping.on_initiate != nullptr || op->send_ping.on_ack != nullptr) {
     if (chand->lb_policy == nullptr) {
       GRPC_CLOSURE_SCHED(
-          exec_ctx, op->send_ping,
+          op->send_ping.on_initiate,
+          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Ping with no load balancing"));
+      GRPC_CLOSURE_SCHED(
+          op->send_ping.on_ack,
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Ping with no load balancing"));
     } else {
-      grpc_lb_policy_ping_one_locked(exec_ctx, chand->lb_policy, op->send_ping);
+      grpc_lb_policy_ping_one_locked(
+          chand->lb_policy, op->send_ping.on_initiate, op->send_ping.on_ack);
       op->bind_pollset = nullptr;
     }
-    op->send_ping = nullptr;
+    op->send_ping.on_initiate = nullptr;
+    op->send_ping.on_ack = nullptr;
   }
 
   if (op->disconnect_with_error != GRPC_ERROR_NONE) {
     if (chand->resolver != nullptr) {
       set_channel_connectivity_state_locked(
-          exec_ctx, chand, GRPC_CHANNEL_SHUTDOWN,
+          chand, GRPC_CHANNEL_SHUTDOWN,
           GRPC_ERROR_REF(op->disconnect_with_error), "disconnect");
-      grpc_resolver_shutdown_locked(exec_ctx, chand->resolver);
-      GRPC_RESOLVER_UNREF(exec_ctx, chand->resolver, "channel");
+      grpc_resolver_shutdown_locked(chand->resolver);
+      GRPC_RESOLVER_UNREF(chand->resolver, "channel");
       chand->resolver = nullptr;
       if (!chand->started_resolving) {
         grpc_closure_list_fail_all(&chand->waiting_for_resolver_result_closures,
                                    GRPC_ERROR_REF(op->disconnect_with_error));
-        GRPC_CLOSURE_LIST_SCHED(exec_ctx,
-                                &chand->waiting_for_resolver_result_closures);
+        GRPC_CLOSURE_LIST_SCHED(&chand->waiting_for_resolver_result_closures);
       }
       if (chand->lb_policy != nullptr) {
-        grpc_pollset_set_del_pollset_set(exec_ctx,
-                                         chand->lb_policy->interested_parties,
+        grpc_pollset_set_del_pollset_set(chand->lb_policy->interested_parties,
                                          chand->interested_parties);
-        GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel");
+        GRPC_LB_POLICY_UNREF(chand->lb_policy, "channel");
         chand->lb_policy = nullptr;
       }
     }
     GRPC_ERROR_UNREF(op->disconnect_with_error);
   }
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->owning_stack, "start_transport_op");
+  GRPC_CHANNEL_STACK_UNREF(chand->owning_stack, "start_transport_op");
 
-  GRPC_CLOSURE_SCHED(exec_ctx, op->on_consumed, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(op->on_consumed, GRPC_ERROR_NONE);
 }
 
-static void cc_start_transport_op(grpc_exec_ctx* exec_ctx,
-                                  grpc_channel_element* elem,
+static void cc_start_transport_op(grpc_channel_element* elem,
                                   grpc_transport_op* op) {
   channel_data* chand = (channel_data*)elem->channel_data;
 
   GPR_ASSERT(op->set_accept_stream == false);
   if (op->bind_pollset != nullptr) {
-    grpc_pollset_set_add_pollset(exec_ctx, chand->interested_parties,
-                                 op->bind_pollset);
+    grpc_pollset_set_add_pollset(chand->interested_parties, op->bind_pollset);
   }
 
   op->handler_private.extra_arg = elem;
   GRPC_CHANNEL_STACK_REF(chand->owning_stack, "start_transport_op");
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_INIT(&op->handler_private.closure, start_transport_op_locked,
                         op, grpc_combiner_scheduler(chand->combiner)),
       GRPC_ERROR_NONE);
 }
 
-static void cc_get_channel_info(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_element* elem,
+static void cc_get_channel_info(grpc_channel_element* elem,
                                 const grpc_channel_info* info) {
   channel_data* chand = (channel_data*)elem->channel_data;
   gpr_mu_lock(&chand->info_mu);
@@ -724,8 +705,7 @@ static void cc_get_channel_info(grpc_exec_ctx* exec_ctx,
 }
 
 /* Constructor for channel_data */
-static grpc_error* cc_init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_element* elem,
+static grpc_error* cc_init_channel_elem(grpc_channel_element* elem,
                                         grpc_channel_element_args* args) {
   channel_data* chand = (channel_data*)elem->channel_data;
   GPR_ASSERT(args->is_last);
@@ -746,7 +726,7 @@ static grpc_error* cc_init_channel_elem(grpc_exec_ctx* exec_ctx,
   chand->interested_parties = grpc_pollset_set_create();
   grpc_connectivity_state_init(&chand->state_tracker, GRPC_CHANNEL_IDLE,
                                "client_channel");
-  grpc_client_channel_start_backup_polling(exec_ctx, chand->interested_parties);
+  grpc_client_channel_start_backup_polling(chand->interested_parties);
   // Record client channel factory.
   const grpc_arg* arg = grpc_channel_args_find(args->channel_args,
                                                GRPC_ARG_CLIENT_CHANNEL_FACTORY);
@@ -774,15 +754,15 @@ static grpc_error* cc_init_channel_elem(grpc_exec_ctx* exec_ctx,
   }
   char* proxy_name = nullptr;
   grpc_channel_args* new_args = nullptr;
-  grpc_proxy_mappers_map_name(exec_ctx, arg->value.string, args->channel_args,
+  grpc_proxy_mappers_map_name(arg->value.string, args->channel_args,
                               &proxy_name, &new_args);
   // Instantiate resolver.
   chand->resolver = grpc_resolver_create(
-      exec_ctx, proxy_name != nullptr ? proxy_name : arg->value.string,
+      proxy_name != nullptr ? proxy_name : arg->value.string,
       new_args != nullptr ? new_args : args->channel_args,
       chand->interested_parties, chand->combiner);
   if (proxy_name != nullptr) gpr_free(proxy_name);
-  if (new_args != nullptr) grpc_channel_args_destroy(exec_ctx, new_args);
+  if (new_args != nullptr) grpc_channel_args_destroy(new_args);
   if (chand->resolver == nullptr) {
     return GRPC_ERROR_CREATE_FROM_STATIC_STRING("resolver creation failed");
   }
@@ -791,32 +771,28 @@ static grpc_error* cc_init_channel_elem(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static void shutdown_resolver_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* error) {
+static void shutdown_resolver_locked(void* arg, grpc_error* error) {
   grpc_resolver* resolver = (grpc_resolver*)arg;
-  grpc_resolver_shutdown_locked(exec_ctx, resolver);
-  GRPC_RESOLVER_UNREF(exec_ctx, resolver, "channel");
+  grpc_resolver_shutdown_locked(resolver);
+  GRPC_RESOLVER_UNREF(resolver, "channel");
 }
 
 /* Destructor for channel_data */
-static void cc_destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_element* elem) {
+static void cc_destroy_channel_elem(grpc_channel_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   if (chand->resolver != nullptr) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_CREATE(shutdown_resolver_locked, chand->resolver,
                             grpc_combiner_scheduler(chand->combiner)),
         GRPC_ERROR_NONE);
   }
   if (chand->client_channel_factory != nullptr) {
-    grpc_client_channel_factory_unref(exec_ctx, chand->client_channel_factory);
+    grpc_client_channel_factory_unref(chand->client_channel_factory);
   }
   if (chand->lb_policy != nullptr) {
-    grpc_pollset_set_del_pollset_set(exec_ctx,
-                                     chand->lb_policy->interested_parties,
+    grpc_pollset_set_del_pollset_set(chand->lb_policy->interested_parties,
                                      chand->interested_parties);
-    GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel");
+    GRPC_LB_POLICY_UNREF(chand->lb_policy, "channel");
   }
   gpr_free(chand->info_lb_policy_name);
   gpr_free(chand->info_service_config_json);
@@ -824,12 +800,12 @@ static void cc_destroy_channel_elem(grpc_exec_ctx* exec_ctx,
     grpc_server_retry_throttle_data_unref(chand->retry_throttle_data);
   }
   if (chand->method_params_table != nullptr) {
-    grpc_slice_hash_table_unref(exec_ctx, chand->method_params_table);
+    grpc_slice_hash_table_unref(chand->method_params_table);
   }
-  grpc_client_channel_stop_backup_polling(exec_ctx, chand->interested_parties);
-  grpc_connectivity_state_destroy(exec_ctx, &chand->state_tracker);
-  grpc_pollset_set_destroy(exec_ctx, chand->interested_parties);
-  GRPC_COMBINER_UNREF(exec_ctx, chand->combiner, "client_channel");
+  grpc_client_channel_stop_backup_polling(chand->interested_parties);
+  grpc_connectivity_state_destroy(&chand->state_tracker);
+  grpc_pollset_set_destroy(chand->interested_parties);
+  GRPC_COMBINER_UNREF(chand->combiner, "client_channel");
   gpr_mu_destroy(&chand->info_mu);
   gpr_mu_destroy(&chand->external_connectivity_watcher_list_mu);
 }
@@ -916,21 +892,18 @@ static void waiting_for_pick_batches_add(
 }
 
 // This is called via the call combiner, so access to calld is synchronized.
-static void fail_pending_batch_in_call_combiner(grpc_exec_ctx* exec_ctx,
-                                                void* arg, grpc_error* error) {
+static void fail_pending_batch_in_call_combiner(void* arg, grpc_error* error) {
   call_data* calld = (call_data*)arg;
   if (calld->waiting_for_pick_batches_count > 0) {
     --calld->waiting_for_pick_batches_count;
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx,
         calld->waiting_for_pick_batches[calld->waiting_for_pick_batches_count],
         GRPC_ERROR_REF(error), calld->call_combiner);
   }
 }
 
 // This is called via the call combiner, so access to calld is synchronized.
-static void waiting_for_pick_batches_fail(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_element* elem,
+static void waiting_for_pick_batches_fail(grpc_call_element* elem,
                                           grpc_error* error) {
   call_data* calld = (call_data*)elem->call_data;
   if (grpc_client_channel_trace.enabled()) {
@@ -943,37 +916,34 @@ static void waiting_for_pick_batches_fail(grpc_exec_ctx* exec_ctx,
     GRPC_CLOSURE_INIT(&calld->handle_pending_batch_in_call_combiner[i],
                       fail_pending_batch_in_call_combiner, calld,
                       grpc_schedule_on_exec_ctx);
-    GRPC_CALL_COMBINER_START(exec_ctx, calld->call_combiner,
-                             &calld->handle_pending_batch_in_call_combiner[i],
-                             GRPC_ERROR_REF(error),
-                             "waiting_for_pick_batches_fail");
+    GRPC_CALL_COMBINER_START(
+        calld->call_combiner, &calld->handle_pending_batch_in_call_combiner[i],
+        GRPC_ERROR_REF(error), "waiting_for_pick_batches_fail");
   }
   if (calld->initial_metadata_batch != nullptr) {
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, calld->initial_metadata_batch, GRPC_ERROR_REF(error),
+        calld->initial_metadata_batch, GRPC_ERROR_REF(error),
         calld->call_combiner);
   } else {
-    GRPC_CALL_COMBINER_STOP(exec_ctx, calld->call_combiner,
+    GRPC_CALL_COMBINER_STOP(calld->call_combiner,
                             "waiting_for_pick_batches_fail");
   }
   GRPC_ERROR_UNREF(error);
 }
 
 // This is called via the call combiner, so access to calld is synchronized.
-static void run_pending_batch_in_call_combiner(grpc_exec_ctx* exec_ctx,
-                                               void* arg, grpc_error* ignored) {
+static void run_pending_batch_in_call_combiner(void* arg, grpc_error* ignored) {
   call_data* calld = (call_data*)arg;
   if (calld->waiting_for_pick_batches_count > 0) {
     --calld->waiting_for_pick_batches_count;
     grpc_subchannel_call_process_op(
-        exec_ctx, calld->subchannel_call,
+        calld->subchannel_call,
         calld->waiting_for_pick_batches[calld->waiting_for_pick_batches_count]);
   }
 }
 
 // This is called via the call combiner, so access to calld is synchronized.
-static void waiting_for_pick_batches_resume(grpc_exec_ctx* exec_ctx,
-                                            grpc_call_element* elem) {
+static void waiting_for_pick_batches_resume(grpc_call_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
   if (grpc_client_channel_trace.enabled()) {
@@ -987,20 +957,18 @@ static void waiting_for_pick_batches_resume(grpc_exec_ctx* exec_ctx,
     GRPC_CLOSURE_INIT(&calld->handle_pending_batch_in_call_combiner[i],
                       run_pending_batch_in_call_combiner, calld,
                       grpc_schedule_on_exec_ctx);
-    GRPC_CALL_COMBINER_START(exec_ctx, calld->call_combiner,
-                             &calld->handle_pending_batch_in_call_combiner[i],
-                             GRPC_ERROR_NONE,
-                             "waiting_for_pick_batches_resume");
+    GRPC_CALL_COMBINER_START(
+        calld->call_combiner, &calld->handle_pending_batch_in_call_combiner[i],
+        GRPC_ERROR_NONE, "waiting_for_pick_batches_resume");
   }
   GPR_ASSERT(calld->initial_metadata_batch != nullptr);
-  grpc_subchannel_call_process_op(exec_ctx, calld->subchannel_call,
+  grpc_subchannel_call_process_op(calld->subchannel_call,
                                   calld->initial_metadata_batch);
 }
 
 // Applies service config to the call.  Must be invoked once we know
 // that the resolver has returned results to the channel.
-static void apply_service_config_to_call_locked(grpc_exec_ctx* exec_ctx,
-                                                grpc_call_element* elem) {
+static void apply_service_config_to_call_locked(grpc_call_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
   if (grpc_client_channel_trace.enabled()) {
@@ -1013,7 +981,7 @@ static void apply_service_config_to_call_locked(grpc_exec_ctx* exec_ctx,
   }
   if (chand->method_params_table != nullptr) {
     calld->method_params = (method_parameters*)grpc_method_config_table_get(
-        exec_ctx, chand->method_params_table, calld->path);
+        chand->method_params_table, calld->path);
     if (calld->method_params != nullptr) {
       method_parameters_ref(calld->method_params);
       // If the deadline from the service config is shorter than the one
@@ -1025,15 +993,14 @@ static void apply_service_config_to_call_locked(grpc_exec_ctx* exec_ctx,
             calld->method_params->timeout;
         if (per_method_deadline < calld->deadline) {
           calld->deadline = per_method_deadline;
-          grpc_deadline_state_reset(exec_ctx, elem, calld->deadline);
+          grpc_deadline_state_reset(elem, calld->deadline);
         }
       }
     }
   }
 }
 
-static void create_subchannel_call_locked(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_element* elem,
+static void create_subchannel_call_locked(grpc_call_element* elem,
                                           grpc_error* error) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -1047,24 +1014,22 @@ static void create_subchannel_call_locked(grpc_exec_ctx* exec_ctx,
       calld->call_combiner             // call_combiner
   };
   grpc_error* new_error = grpc_connected_subchannel_create_call(
-      exec_ctx, calld->connected_subchannel, &call_args,
-      &calld->subchannel_call);
+      calld->connected_subchannel, &call_args, &calld->subchannel_call);
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG, "chand=%p calld=%p: create subchannel_call=%p: error=%s",
             chand, calld, calld->subchannel_call, grpc_error_string(new_error));
   }
   if (new_error != GRPC_ERROR_NONE) {
     new_error = grpc_error_add_child(new_error, error);
-    waiting_for_pick_batches_fail(exec_ctx, elem, new_error);
+    waiting_for_pick_batches_fail(elem, new_error);
   } else {
-    waiting_for_pick_batches_resume(exec_ctx, elem);
+    waiting_for_pick_batches_resume(elem);
   }
   GRPC_ERROR_UNREF(error);
 }
 
 // Invoked when a pick is completed, on both success or failure.
-static void pick_done_locked(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-                             grpc_error* error) {
+static void pick_done_locked(grpc_call_element* elem, grpc_error* error) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   if (calld->connected_subchannel == nullptr) {
@@ -1080,10 +1045,10 @@ static void pick_done_locked(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
               "chand=%p calld=%p: failed to create subchannel: error=%s", chand,
               calld, grpc_error_string(calld->error));
     }
-    waiting_for_pick_batches_fail(exec_ctx, elem, GRPC_ERROR_REF(calld->error));
+    waiting_for_pick_batches_fail(elem, GRPC_ERROR_REF(calld->error));
   } else {
     /* Create call on subchannel. */
-    create_subchannel_call_locked(exec_ctx, elem, GRPC_ERROR_REF(error));
+    create_subchannel_call_locked(elem, GRPC_ERROR_REF(error));
   }
   GRPC_ERROR_UNREF(error);
 }
@@ -1092,19 +1057,17 @@ static void pick_done_locked(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
 // either (a) the pick was deferred pending a resolver result or (b) the
 // pick was done asynchronously.  Removes the call's polling entity from
 // chand->interested_parties before invoking pick_done_locked().
-static void async_pick_done_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem, grpc_error* error) {
+static void async_pick_done_locked(grpc_call_element* elem, grpc_error* error) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
-  grpc_polling_entity_del_from_pollset_set(exec_ctx, calld->pollent,
+  grpc_polling_entity_del_from_pollset_set(calld->pollent,
                                            chand->interested_parties);
-  pick_done_locked(exec_ctx, elem, error);
+  pick_done_locked(elem, error);
 }
 
 // Note: This runs under the client_channel combiner, but will NOT be
 // holding the call combiner.
-static void pick_callback_cancel_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void pick_callback_cancel_locked(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -1113,17 +1076,15 @@ static void pick_callback_cancel_locked(grpc_exec_ctx* exec_ctx, void* arg,
       gpr_log(GPR_DEBUG, "chand=%p calld=%p: cancelling pick from LB policy %p",
               chand, calld, calld->lb_policy);
     }
-    grpc_lb_policy_cancel_pick_locked(exec_ctx, calld->lb_policy,
-                                      &calld->connected_subchannel,
-                                      GRPC_ERROR_REF(error));
+    grpc_lb_policy_cancel_pick_locked(
+        calld->lb_policy, &calld->connected_subchannel, GRPC_ERROR_REF(error));
   }
-  GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "pick_callback_cancel");
+  GRPC_CALL_STACK_UNREF(calld->owning_call, "pick_callback_cancel");
 }
 
 // Callback invoked by grpc_lb_policy_pick_locked() for async picks.
 // Unrefs the LB policy and invokes async_pick_done_locked().
-static void pick_callback_done_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_error* error) {
+static void pick_callback_done_locked(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -1132,23 +1093,22 @@ static void pick_callback_done_locked(grpc_exec_ctx* exec_ctx, void* arg,
             chand, calld);
   }
   GPR_ASSERT(calld->lb_policy != nullptr);
-  GRPC_LB_POLICY_UNREF(exec_ctx, calld->lb_policy, "pick_subchannel");
+  GRPC_LB_POLICY_UNREF(calld->lb_policy, "pick_subchannel");
   calld->lb_policy = nullptr;
-  async_pick_done_locked(exec_ctx, elem, GRPC_ERROR_REF(error));
+  async_pick_done_locked(elem, GRPC_ERROR_REF(error));
 }
 
 // Takes a ref to chand->lb_policy and calls grpc_lb_policy_pick_locked().
 // If the pick was completed synchronously, unrefs the LB policy and
 // returns true.
-static bool pick_callback_start_locked(grpc_exec_ctx* exec_ctx,
-                                       grpc_call_element* elem) {
+static bool pick_callback_start_locked(grpc_call_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG, "chand=%p calld=%p: starting pick on lb_policy=%p",
             chand, calld, chand->lb_policy);
   }
-  apply_service_config_to_call_locked(exec_ctx, elem);
+  apply_service_config_to_call_locked(elem);
   // If the application explicitly set wait_for_ready, use that.
   // Otherwise, if the service config specified a value for this
   // method, use that.
@@ -1178,7 +1138,7 @@ static bool pick_callback_start_locked(grpc_exec_ctx* exec_ctx,
   GRPC_CLOSURE_INIT(&calld->lb_pick_closure, pick_callback_done_locked, elem,
                     grpc_combiner_scheduler(chand->combiner));
   const bool pick_done = grpc_lb_policy_pick_locked(
-      exec_ctx, chand->lb_policy, &inputs, &calld->connected_subchannel,
+      chand->lb_policy, &inputs, &calld->connected_subchannel,
       calld->subchannel_call_context, nullptr, &calld->lb_pick_closure);
   if (pick_done) {
     /* synchronous grpc_lb_policy_pick call. Unref the LB policy. */
@@ -1186,12 +1146,12 @@ static bool pick_callback_start_locked(grpc_exec_ctx* exec_ctx,
       gpr_log(GPR_DEBUG, "chand=%p calld=%p: pick completed synchronously",
               chand, calld);
     }
-    GRPC_LB_POLICY_UNREF(exec_ctx, calld->lb_policy, "pick_subchannel");
+    GRPC_LB_POLICY_UNREF(calld->lb_policy, "pick_subchannel");
     calld->lb_policy = nullptr;
   } else {
     GRPC_CALL_STACK_REF(calld->owning_call, "pick_callback_cancel");
     grpc_call_combiner_set_notify_on_cancel(
-        exec_ctx, calld->call_combiner,
+        calld->call_combiner,
         GRPC_CLOSURE_INIT(&calld->lb_pick_cancel_closure,
                           pick_callback_cancel_locked, elem,
                           grpc_combiner_scheduler(chand->combiner)));
@@ -1208,8 +1168,7 @@ typedef struct {
 
 // Note: This runs under the client_channel combiner, but will NOT be
 // holding the call combiner.
-static void pick_after_resolver_result_cancel_locked(grpc_exec_ctx* exec_ctx,
-                                                     void* arg,
+static void pick_after_resolver_result_cancel_locked(void* arg,
                                                      grpc_error* error) {
   pick_after_resolver_result_args* args = (pick_after_resolver_result_args*)arg;
   if (args->finished) {
@@ -1237,16 +1196,13 @@ static void pick_after_resolver_result_cancel_locked(grpc_exec_ctx* exec_ctx,
   // it's safe to call async_pick_done_locked() here -- we are
   // essentially calling it here instead of calling it in
   // pick_after_resolver_result_done_locked().
-  async_pick_done_locked(exec_ctx, elem,
-                         GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-                             "Pick cancelled", &error, 1));
+  async_pick_done_locked(elem, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                                   "Pick cancelled", &error, 1));
 }
 
-static void pick_after_resolver_result_start_locked(grpc_exec_ctx* exec_ctx,
-                                                    grpc_call_element* elem);
+static void pick_after_resolver_result_start_locked(grpc_call_element* elem);
 
-static void pick_after_resolver_result_done_locked(grpc_exec_ctx* exec_ctx,
-                                                   void* arg,
+static void pick_after_resolver_result_done_locked(void* arg,
                                                    grpc_error* error) {
   pick_after_resolver_result_args* args = (pick_after_resolver_result_args*)arg;
   if (args->finished) {
@@ -1266,19 +1222,19 @@ static void pick_after_resolver_result_done_locked(grpc_exec_ctx* exec_ctx,
       gpr_log(GPR_DEBUG, "chand=%p calld=%p: resolver failed to return data",
               chand, calld);
     }
-    async_pick_done_locked(exec_ctx, elem, GRPC_ERROR_REF(error));
+    async_pick_done_locked(elem, GRPC_ERROR_REF(error));
   } else if (chand->lb_policy != nullptr) {
     if (grpc_client_channel_trace.enabled()) {
       gpr_log(GPR_DEBUG, "chand=%p calld=%p: resolver returned, doing pick",
               chand, calld);
     }
-    if (pick_callback_start_locked(exec_ctx, elem)) {
+    if (pick_callback_start_locked(elem)) {
       // Even if the LB policy returns a result synchronously, we have
       // already added our polling entity to chand->interested_parties
       // in order to wait for the resolver result, so we need to
       // remove it here.  Therefore, we call async_pick_done_locked()
       // instead of pick_done_locked().
-      async_pick_done_locked(exec_ctx, elem, GRPC_ERROR_NONE);
+      async_pick_done_locked(elem, GRPC_ERROR_NONE);
     }
   }
   // TODO(roth): It should be impossible for chand->lb_policy to be NULL
@@ -1296,19 +1252,18 @@ static void pick_after_resolver_result_done_locked(grpc_exec_ctx* exec_ctx,
               "trying again",
               chand, calld);
     }
-    pick_after_resolver_result_start_locked(exec_ctx, elem);
+    pick_after_resolver_result_start_locked(elem);
   } else {
     if (grpc_client_channel_trace.enabled()) {
       gpr_log(GPR_DEBUG, "chand=%p calld=%p: resolver disconnected", chand,
               calld);
     }
     async_pick_done_locked(
-        exec_ctx, elem, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Disconnected"));
+        elem, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Disconnected"));
   }
 }
 
-static void pick_after_resolver_result_start_locked(grpc_exec_ctx* exec_ctx,
-                                                    grpc_call_element* elem) {
+static void pick_after_resolver_result_start_locked(grpc_call_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
   if (grpc_client_channel_trace.enabled()) {
@@ -1324,47 +1279,46 @@ static void pick_after_resolver_result_start_locked(grpc_exec_ctx* exec_ctx,
   grpc_closure_list_append(&chand->waiting_for_resolver_result_closures,
                            &args->closure, GRPC_ERROR_NONE);
   grpc_call_combiner_set_notify_on_cancel(
-      exec_ctx, calld->call_combiner,
+      calld->call_combiner,
       GRPC_CLOSURE_INIT(&args->cancel_closure,
                         pick_after_resolver_result_cancel_locked, args,
                         grpc_combiner_scheduler(chand->combiner)));
 }
 
-static void start_pick_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* ignored) {
+static void start_pick_locked(void* arg, grpc_error* ignored) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   GPR_ASSERT(calld->connected_subchannel == nullptr);
   if (chand->lb_policy != nullptr) {
     // We already have an LB policy, so ask it for a pick.
-    if (pick_callback_start_locked(exec_ctx, elem)) {
+    if (pick_callback_start_locked(elem)) {
       // Pick completed synchronously.
-      pick_done_locked(exec_ctx, elem, GRPC_ERROR_NONE);
+      pick_done_locked(elem, GRPC_ERROR_NONE);
       return;
     }
   } else {
     // We do not yet have an LB policy, so wait for a resolver result.
     if (chand->resolver == nullptr) {
-      pick_done_locked(exec_ctx, elem,
+      pick_done_locked(elem,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Disconnected"));
       return;
     }
     if (!chand->started_resolving) {
-      start_resolving_locked(exec_ctx, chand);
+      start_resolving_locked(chand);
     }
-    pick_after_resolver_result_start_locked(exec_ctx, elem);
+    pick_after_resolver_result_start_locked(elem);
   }
   // We need to wait for either a resolver result or for an async result
   // from the LB policy.  Add the polling entity from call_data to the
   // channel_data's interested_parties, so that the I/O of the LB policy
   // and resolver can be done under it.  The polling entity will be
   // removed in async_pick_done_locked().
-  grpc_polling_entity_add_to_pollset_set(exec_ctx, calld->pollent,
+  grpc_polling_entity_add_to_pollset_set(calld->pollent,
                                          chand->interested_parties);
 }
 
-static void on_complete(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_complete(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   if (calld->retry_throttle_data != nullptr) {
@@ -1380,18 +1334,15 @@ static void on_complete(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
           calld->retry_throttle_data);
     }
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_on_complete,
-                   GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(calld->original_on_complete, GRPC_ERROR_REF(error));
 }
 
 static void cc_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   if (chand->deadline_checking_enabled) {
-    grpc_deadline_state_client_start_transport_stream_op_batch(exec_ctx, elem,
-                                                               batch);
+    grpc_deadline_state_client_start_transport_stream_op_batch(elem, batch);
   }
   GPR_TIMER_BEGIN("cc_start_transport_stream_op_batch", 0);
   // If we've previously been cancelled, immediately fail any new batches.
@@ -1401,7 +1352,7 @@ static void cc_start_transport_stream_op_batch(
               chand, calld, grpc_error_string(calld->error));
     }
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, batch, GRPC_ERROR_REF(calld->error), calld->call_combiner);
+        batch, GRPC_ERROR_REF(calld->error), calld->call_combiner);
     goto done;
   }
   if (batch->cancel_stream) {
@@ -1419,11 +1370,10 @@ static void cc_start_transport_stream_op_batch(
     // If we have a subchannel call, send the cancellation batch down.
     // Otherwise, fail all pending batches.
     if (calld->subchannel_call != nullptr) {
-      grpc_subchannel_call_process_op(exec_ctx, calld->subchannel_call, batch);
+      grpc_subchannel_call_process_op(calld->subchannel_call, batch);
     } else {
       waiting_for_pick_batches_add(calld, batch);
-      waiting_for_pick_batches_fail(exec_ctx, elem,
-                                    GRPC_ERROR_REF(calld->error));
+      waiting_for_pick_batches_fail(elem, GRPC_ERROR_REF(calld->error));
     }
     goto done;
   }
@@ -1446,7 +1396,7 @@ static void cc_start_transport_stream_op_batch(
               "chand=%p calld=%p: sending batch to subchannel_call=%p", chand,
               calld, calld->subchannel_call);
     }
-    grpc_subchannel_call_process_op(exec_ctx, calld->subchannel_call, batch);
+    grpc_subchannel_call_process_op(calld->subchannel_call, batch);
     goto done;
   }
   // We do not yet have a subchannel call.
@@ -1460,7 +1410,6 @@ static void cc_start_transport_stream_op_batch(
               chand, calld);
     }
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_INIT(&batch->handler_private.closure, start_pick_locked,
                           elem, grpc_combiner_scheduler(chand->combiner)),
         GRPC_ERROR_NONE);
@@ -1471,7 +1420,7 @@ static void cc_start_transport_stream_op_batch(
               "chand=%p calld=%p: saved batch, yeilding call combiner", chand,
               calld);
     }
-    GRPC_CALL_COMBINER_STOP(exec_ctx, calld->call_combiner,
+    GRPC_CALL_COMBINER_STOP(calld->call_combiner,
                             "batch does not include send_initial_metadata");
   }
 done:
@@ -1479,8 +1428,7 @@ done:
 }
 
 /* Constructor for call_data */
-static grpc_error* cc_init_call_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_element* elem,
+static grpc_error* cc_init_call_elem(grpc_call_element* elem,
                                      const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -1492,23 +1440,22 @@ static grpc_error* cc_init_call_elem(grpc_exec_ctx* exec_ctx,
   calld->owning_call = args->call_stack;
   calld->call_combiner = args->call_combiner;
   if (chand->deadline_checking_enabled) {
-    grpc_deadline_state_init(exec_ctx, elem, args->call_stack,
-                             args->call_combiner, calld->deadline);
+    grpc_deadline_state_init(elem, args->call_stack, args->call_combiner,
+                             calld->deadline);
   }
   return GRPC_ERROR_NONE;
 }
 
 /* Destructor for call_data */
-static void cc_destroy_call_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_call_element* elem,
+static void cc_destroy_call_elem(grpc_call_element* elem,
                                  const grpc_call_final_info* final_info,
                                  grpc_closure* then_schedule_closure) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   if (chand->deadline_checking_enabled) {
-    grpc_deadline_state_destroy(exec_ctx, elem);
+    grpc_deadline_state_destroy(elem);
   }
-  grpc_slice_unref_internal(exec_ctx, calld->path);
+  grpc_slice_unref_internal(calld->path);
   if (calld->method_params != nullptr) {
     method_parameters_unref(calld->method_params);
   }
@@ -1517,14 +1464,13 @@ static void cc_destroy_call_elem(grpc_exec_ctx* exec_ctx,
     grpc_subchannel_call_set_cleanup_closure(calld->subchannel_call,
                                              then_schedule_closure);
     then_schedule_closure = nullptr;
-    GRPC_SUBCHANNEL_CALL_UNREF(exec_ctx, calld->subchannel_call,
+    GRPC_SUBCHANNEL_CALL_UNREF(calld->subchannel_call,
                                "client_channel_destroy_call");
   }
   GPR_ASSERT(calld->lb_policy == nullptr);
   GPR_ASSERT(calld->waiting_for_pick_batches_count == 0);
   if (calld->connected_subchannel != nullptr) {
-    GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, calld->connected_subchannel,
-                                    "picked");
+    GRPC_CONNECTED_SUBCHANNEL_UNREF(calld->connected_subchannel, "picked");
   }
   for (size_t i = 0; i < GRPC_CONTEXT_COUNT; ++i) {
     if (calld->subchannel_call_context[i].value != nullptr) {
@@ -1532,11 +1478,10 @@ static void cc_destroy_call_elem(grpc_exec_ctx* exec_ctx,
           calld->subchannel_call_context[i].value);
     }
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, then_schedule_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(then_schedule_closure, GRPC_ERROR_NONE);
 }
 
-static void cc_set_pollset_or_pollset_set(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_element* elem,
+static void cc_set_pollset_or_pollset_set(grpc_call_element* elem,
                                           grpc_polling_entity* pollent) {
   call_data* calld = (call_data*)elem->call_data;
   calld->pollent = pollent;
@@ -1560,29 +1505,27 @@ const grpc_channel_filter grpc_client_channel_filter = {
     "client-channel",
 };
 
-static void try_to_connect_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                  grpc_error* error_ignored) {
+static void try_to_connect_locked(void* arg, grpc_error* error_ignored) {
   channel_data* chand = (channel_data*)arg;
   if (chand->lb_policy != nullptr) {
-    grpc_lb_policy_exit_idle_locked(exec_ctx, chand->lb_policy);
+    grpc_lb_policy_exit_idle_locked(chand->lb_policy);
   } else {
     chand->exit_idle_when_lb_policy_arrives = true;
     if (!chand->started_resolving && chand->resolver != nullptr) {
-      start_resolving_locked(exec_ctx, chand);
+      start_resolving_locked(chand);
     }
   }
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->owning_stack, "try_to_connect");
+  GRPC_CHANNEL_STACK_UNREF(chand->owning_stack, "try_to_connect");
 }
 
 grpc_connectivity_state grpc_client_channel_check_connectivity_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_element* elem, int try_to_connect) {
+    grpc_channel_element* elem, int try_to_connect) {
   channel_data* chand = (channel_data*)elem->channel_data;
   grpc_connectivity_state out =
       grpc_connectivity_state_check(&chand->state_tracker);
   if (out == GRPC_CHANNEL_IDLE && try_to_connect) {
     GRPC_CHANNEL_STACK_REF(chand->owning_stack, "try_to_connect");
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_CREATE(try_to_connect_locked, chand,
                             grpc_combiner_scheduler(chand->combiner)),
         GRPC_ERROR_NONE);
@@ -1663,50 +1606,49 @@ int grpc_client_channel_num_external_connectivity_watchers(
   return count;
 }
 
-static void on_external_watch_complete_locked(grpc_exec_ctx* exec_ctx,
-                                              void* arg, grpc_error* error) {
+static void on_external_watch_complete_locked(void* arg, grpc_error* error) {
   external_connectivity_watcher* w = (external_connectivity_watcher*)arg;
   grpc_closure* follow_up = w->on_complete;
-  grpc_polling_entity_del_from_pollset_set(exec_ctx, &w->pollent,
+  grpc_polling_entity_del_from_pollset_set(&w->pollent,
                                            w->chand->interested_parties);
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, w->chand->owning_stack,
+  GRPC_CHANNEL_STACK_UNREF(w->chand->owning_stack,
                            "external_connectivity_watcher");
   external_connectivity_watcher_list_remove(w->chand, w);
   gpr_free(w);
-  GRPC_CLOSURE_RUN(exec_ctx, follow_up, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(follow_up, GRPC_ERROR_REF(error));
 }
 
-static void watch_connectivity_state_locked(grpc_exec_ctx* exec_ctx, void* arg,
+static void watch_connectivity_state_locked(void* arg,
                                             grpc_error* error_ignored) {
   external_connectivity_watcher* w = (external_connectivity_watcher*)arg;
   external_connectivity_watcher* found = nullptr;
   if (w->state != nullptr) {
     external_connectivity_watcher_list_append(w->chand, w);
-    GRPC_CLOSURE_RUN(exec_ctx, w->watcher_timer_init, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_RUN(w->watcher_timer_init, GRPC_ERROR_NONE);
     GRPC_CLOSURE_INIT(&w->my_closure, on_external_watch_complete_locked, w,
                       grpc_combiner_scheduler(w->chand->combiner));
-    grpc_connectivity_state_notify_on_state_change(
-        exec_ctx, &w->chand->state_tracker, w->state, &w->my_closure);
+    grpc_connectivity_state_notify_on_state_change(&w->chand->state_tracker,
+                                                   w->state, &w->my_closure);
   } else {
     GPR_ASSERT(w->watcher_timer_init == nullptr);
     found = lookup_external_connectivity_watcher(w->chand, w->on_complete);
     if (found) {
       GPR_ASSERT(found->on_complete == w->on_complete);
       grpc_connectivity_state_notify_on_state_change(
-          exec_ctx, &found->chand->state_tracker, nullptr, &found->my_closure);
+          &found->chand->state_tracker, nullptr, &found->my_closure);
     }
-    grpc_polling_entity_del_from_pollset_set(exec_ctx, &w->pollent,
+    grpc_polling_entity_del_from_pollset_set(&w->pollent,
                                              w->chand->interested_parties);
-    GRPC_CHANNEL_STACK_UNREF(exec_ctx, w->chand->owning_stack,
+    GRPC_CHANNEL_STACK_UNREF(w->chand->owning_stack,
                              "external_connectivity_watcher");
     gpr_free(w);
   }
 }
 
 void grpc_client_channel_watch_connectivity_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
-    grpc_polling_entity pollent, grpc_connectivity_state* state,
-    grpc_closure* closure, grpc_closure* watcher_timer_init) {
+    grpc_channel_element* elem, grpc_polling_entity pollent,
+    grpc_connectivity_state* state, grpc_closure* closure,
+    grpc_closure* watcher_timer_init) {
   channel_data* chand = (channel_data*)elem->channel_data;
   external_connectivity_watcher* w =
       (external_connectivity_watcher*)gpr_zalloc(sizeof(*w));
@@ -1715,12 +1657,11 @@ void grpc_client_channel_watch_connectivity_state(
   w->on_complete = closure;
   w->state = state;
   w->watcher_timer_init = watcher_timer_init;
-  grpc_polling_entity_add_to_pollset_set(exec_ctx, &w->pollent,
+  grpc_polling_entity_add_to_pollset_set(&w->pollent,
                                          chand->interested_parties);
   GRPC_CHANNEL_STACK_REF(w->chand->owning_stack,
                          "external_connectivity_watcher");
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_INIT(&w->my_closure, watch_connectivity_state_locked, w,
                         grpc_combiner_scheduler(chand->combiner)),
       GRPC_ERROR_NONE);
diff --git a/src/core/ext/filters/client_channel/client_channel.h b/src/core/ext/filters/client_channel/client_channel.h
index 48e4637a82..9670405cbe 100644
--- a/src/core/ext/filters/client_channel/client_channel.h
+++ b/src/core/ext/filters/client_channel/client_channel.h
@@ -38,15 +38,15 @@ extern grpc_core::TraceFlag grpc_client_channel_trace;
 extern const grpc_channel_filter grpc_client_channel_filter;
 
 grpc_connectivity_state grpc_client_channel_check_connectivity_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_element* elem, int try_to_connect);
+    grpc_channel_element* elem, int try_to_connect);
 
 int grpc_client_channel_num_external_connectivity_watchers(
     grpc_channel_element* elem);
 
 void grpc_client_channel_watch_connectivity_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
-    grpc_polling_entity pollent, grpc_connectivity_state* state,
-    grpc_closure* on_complete, grpc_closure* watcher_timer_init);
+    grpc_channel_element* elem, grpc_polling_entity pollent,
+    grpc_connectivity_state* state, grpc_closure* on_complete,
+    grpc_closure* watcher_timer_init);
 
 /* Debug helper: pull the subchannel call from a call stack element */
 grpc_subchannel_call* grpc_client_channel_get_subchannel_call(
diff --git a/src/core/ext/filters/client_channel/client_channel_factory.cc b/src/core/ext/filters/client_channel/client_channel_factory.cc
index 57eac8f875..60c95d7dc9 100644
--- a/src/core/ext/filters/client_channel/client_channel_factory.cc
+++ b/src/core/ext/filters/client_channel/client_channel_factory.cc
@@ -23,23 +23,19 @@ void grpc_client_channel_factory_ref(grpc_client_channel_factory* factory) {
   factory->vtable->ref(factory);
 }
 
-void grpc_client_channel_factory_unref(grpc_exec_ctx* exec_ctx,
-                                       grpc_client_channel_factory* factory) {
-  factory->vtable->unref(exec_ctx, factory);
+void grpc_client_channel_factory_unref(grpc_client_channel_factory* factory) {
+  factory->vtable->unref(factory);
 }
 
 grpc_subchannel* grpc_client_channel_factory_create_subchannel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* factory,
-    const grpc_subchannel_args* args) {
-  return factory->vtable->create_subchannel(exec_ctx, factory, args);
+    grpc_client_channel_factory* factory, const grpc_subchannel_args* args) {
+  return factory->vtable->create_subchannel(factory, args);
 }
 
 grpc_channel* grpc_client_channel_factory_create_channel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* factory,
-    const char* target, grpc_client_channel_type type,
-    const grpc_channel_args* args) {
-  return factory->vtable->create_client_channel(exec_ctx, factory, target, type,
-                                                args);
+    grpc_client_channel_factory* factory, const char* target,
+    grpc_client_channel_type type, const grpc_channel_args* args) {
+  return factory->vtable->create_client_channel(factory, target, type, args);
 }
 
 static void* factory_arg_copy(void* factory) {
@@ -47,9 +43,8 @@ static void* factory_arg_copy(void* factory) {
   return factory;
 }
 
-static void factory_arg_destroy(grpc_exec_ctx* exec_ctx, void* factory) {
-  grpc_client_channel_factory_unref(exec_ctx,
-                                    (grpc_client_channel_factory*)factory);
+static void factory_arg_destroy(void* factory) {
+  grpc_client_channel_factory_unref((grpc_client_channel_factory*)factory);
 }
 
 static int factory_arg_cmp(void* factory1, void* factory2) {
diff --git a/src/core/ext/filters/client_channel/client_channel_factory.h b/src/core/ext/filters/client_channel/client_channel_factory.h
index db82b733ce..766ebb9389 100644
--- a/src/core/ext/filters/client_channel/client_channel_factory.h
+++ b/src/core/ext/filters/client_channel/client_channel_factory.h
@@ -45,31 +45,26 @@ struct grpc_client_channel_factory {
 
 struct grpc_client_channel_factory_vtable {
   void (*ref)(grpc_client_channel_factory* factory);
-  void (*unref)(grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* factory);
-  grpc_subchannel* (*create_subchannel)(grpc_exec_ctx* exec_ctx,
-                                        grpc_client_channel_factory* factory,
+  void (*unref)(grpc_client_channel_factory* factory);
+  grpc_subchannel* (*create_subchannel)(grpc_client_channel_factory* factory,
                                         const grpc_subchannel_args* args);
-  grpc_channel* (*create_client_channel)(grpc_exec_ctx* exec_ctx,
-                                         grpc_client_channel_factory* factory,
+  grpc_channel* (*create_client_channel)(grpc_client_channel_factory* factory,
                                          const char* target,
                                          grpc_client_channel_type type,
                                          const grpc_channel_args* args);
 };
 
 void grpc_client_channel_factory_ref(grpc_client_channel_factory* factory);
-void grpc_client_channel_factory_unref(grpc_exec_ctx* exec_ctx,
-                                       grpc_client_channel_factory* factory);
+void grpc_client_channel_factory_unref(grpc_client_channel_factory* factory);
 
 /** Create a new grpc_subchannel */
 grpc_subchannel* grpc_client_channel_factory_create_subchannel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* factory,
-    const grpc_subchannel_args* args);
+    grpc_client_channel_factory* factory, const grpc_subchannel_args* args);
 
 /** Create a new grpc_channel */
 grpc_channel* grpc_client_channel_factory_create_channel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* factory,
-    const char* target, grpc_client_channel_type type,
-    const grpc_channel_args* args);
+    grpc_client_channel_factory* factory, const char* target,
+    grpc_client_channel_type type, const grpc_channel_args* args);
 
 grpc_arg grpc_client_channel_factory_create_channel_arg(
     grpc_client_channel_factory* factory);
diff --git a/src/core/ext/filters/client_channel/client_channel_plugin.cc b/src/core/ext/filters/client_channel/client_channel_plugin.cc
index 7a5bb18157..ea630d2917 100644
--- a/src/core/ext/filters/client_channel/client_channel_plugin.cc
+++ b/src/core/ext/filters/client_channel/client_channel_plugin.cc
@@ -34,14 +34,12 @@
 #include "src/core/ext/filters/client_channel/subchannel_index.h"
 #include "src/core/lib/surface/channel_init.h"
 
-static bool append_filter(grpc_exec_ctx* exec_ctx,
-                          grpc_channel_stack_builder* builder, void* arg) {
+static bool append_filter(grpc_channel_stack_builder* builder, void* arg) {
   return grpc_channel_stack_builder_append_filter(
       builder, (const grpc_channel_filter*)arg, nullptr, nullptr);
 }
 
-static bool set_default_host_if_unset(grpc_exec_ctx* exec_ctx,
-                                      grpc_channel_stack_builder* builder,
+static bool set_default_host_if_unset(grpc_channel_stack_builder* builder,
                                       void* unused) {
   const grpc_channel_args* args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
@@ -52,15 +50,14 @@ static bool set_default_host_if_unset(grpc_exec_ctx* exec_ctx,
     }
   }
   char* default_authority = grpc_get_default_authority(
-      exec_ctx, grpc_channel_stack_builder_get_target(builder));
+      grpc_channel_stack_builder_get_target(builder));
   if (default_authority != nullptr) {
     grpc_arg arg = grpc_channel_arg_string_create(
         (char*)GRPC_ARG_DEFAULT_AUTHORITY, default_authority);
     grpc_channel_args* new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
-    grpc_channel_stack_builder_set_channel_arguments(exec_ctx, builder,
-                                                     new_args);
+    grpc_channel_stack_builder_set_channel_arguments(builder, new_args);
     gpr_free(default_authority);
-    grpc_channel_args_destroy(exec_ctx, new_args);
+    grpc_channel_args_destroy(new_args);
   }
   return true;
 }
diff --git a/src/core/ext/filters/client_channel/connector.cc b/src/core/ext/filters/client_channel/connector.cc
index c258468e58..c8bf2f3e1c 100644
--- a/src/core/ext/filters/client_channel/connector.cc
+++ b/src/core/ext/filters/client_channel/connector.cc
@@ -23,18 +23,17 @@ grpc_connector* grpc_connector_ref(grpc_connector* connector) {
   return connector;
 }
 
-void grpc_connector_unref(grpc_exec_ctx* exec_ctx, grpc_connector* connector) {
-  connector->vtable->unref(exec_ctx, connector);
+void grpc_connector_unref(grpc_connector* connector) {
+  connector->vtable->unref(connector);
 }
 
-void grpc_connector_connect(grpc_exec_ctx* exec_ctx, grpc_connector* connector,
+void grpc_connector_connect(grpc_connector* connector,
                             const grpc_connect_in_args* in_args,
                             grpc_connect_out_args* out_args,
                             grpc_closure* notify) {
-  connector->vtable->connect(exec_ctx, connector, in_args, out_args, notify);
+  connector->vtable->connect(connector, in_args, out_args, notify);
 }
 
-void grpc_connector_shutdown(grpc_exec_ctx* exec_ctx, grpc_connector* connector,
-                             grpc_error* why) {
-  connector->vtable->shutdown(exec_ctx, connector, why);
+void grpc_connector_shutdown(grpc_connector* connector, grpc_error* why) {
+  connector->vtable->shutdown(connector, why);
 }
diff --git a/src/core/ext/filters/client_channel/connector.h b/src/core/ext/filters/client_channel/connector.h
index 239ed8a8bd..d657658d67 100644
--- a/src/core/ext/filters/client_channel/connector.h
+++ b/src/core/ext/filters/client_channel/connector.h
@@ -49,25 +49,23 @@ typedef struct {
 
 struct grpc_connector_vtable {
   void (*ref)(grpc_connector* connector);
-  void (*unref)(grpc_exec_ctx* exec_ctx, grpc_connector* connector);
+  void (*unref)(grpc_connector* connector);
   /** Implementation of grpc_connector_shutdown */
-  void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_connector* connector,
-                   grpc_error* why);
+  void (*shutdown)(grpc_connector* connector, grpc_error* why);
   /** Implementation of grpc_connector_connect */
-  void (*connect)(grpc_exec_ctx* exec_ctx, grpc_connector* connector,
+  void (*connect)(grpc_connector* connector,
                   const grpc_connect_in_args* in_args,
                   grpc_connect_out_args* out_args, grpc_closure* notify);
 };
 
 grpc_connector* grpc_connector_ref(grpc_connector* connector);
-void grpc_connector_unref(grpc_exec_ctx* exec_ctx, grpc_connector* connector);
+void grpc_connector_unref(grpc_connector* connector);
 /** Connect using the connector: max one outstanding call at a time */
-void grpc_connector_connect(grpc_exec_ctx* exec_ctx, grpc_connector* connector,
+void grpc_connector_connect(grpc_connector* connector,
                             const grpc_connect_in_args* in_args,
                             grpc_connect_out_args* out_args,
                             grpc_closure* notify);
 /** Cancel any pending connection */
-void grpc_connector_shutdown(grpc_exec_ctx* exec_ctx, grpc_connector* connector,
-                             grpc_error* why);
+void grpc_connector_shutdown(grpc_connector* connector, grpc_error* why);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CONNECTOR_H */
diff --git a/src/core/ext/filters/client_channel/http_connect_handshaker.cc b/src/core/ext/filters/client_channel/http_connect_handshaker.cc
index b7cb2e3eba..556a3bc6a1 100644
--- a/src/core/ext/filters/client_channel/http_connect_handshaker.cc
+++ b/src/core/ext/filters/client_channel/http_connect_handshaker.cc
@@ -61,41 +61,38 @@ typedef struct http_connect_handshaker {
 } http_connect_handshaker;
 
 // Unref and clean up handshaker.
-static void http_connect_handshaker_unref(grpc_exec_ctx* exec_ctx,
-                                          http_connect_handshaker* handshaker) {
+static void http_connect_handshaker_unref(http_connect_handshaker* handshaker) {
   if (gpr_unref(&handshaker->refcount)) {
     gpr_mu_destroy(&handshaker->mu);
     if (handshaker->endpoint_to_destroy != nullptr) {
-      grpc_endpoint_destroy(exec_ctx, handshaker->endpoint_to_destroy);
+      grpc_endpoint_destroy(handshaker->endpoint_to_destroy);
     }
     if (handshaker->read_buffer_to_destroy != nullptr) {
-      grpc_slice_buffer_destroy_internal(exec_ctx,
-                                         handshaker->read_buffer_to_destroy);
+      grpc_slice_buffer_destroy_internal(handshaker->read_buffer_to_destroy);
       gpr_free(handshaker->read_buffer_to_destroy);
     }
-    grpc_slice_buffer_destroy_internal(exec_ctx, &handshaker->write_buffer);
+    grpc_slice_buffer_destroy_internal(&handshaker->write_buffer);
     grpc_http_parser_destroy(&handshaker->http_parser);
     grpc_http_response_destroy(&handshaker->http_response);
     gpr_free(handshaker);
   }
 }
 
-// Set args fields to NULL, saving the endpoint and read buffer for
+// Set args fields to nullptr, saving the endpoint and read buffer for
 // later destruction.
 static void cleanup_args_for_failure_locked(
-    grpc_exec_ctx* exec_ctx, http_connect_handshaker* handshaker) {
+    http_connect_handshaker* handshaker) {
   handshaker->endpoint_to_destroy = handshaker->args->endpoint;
   handshaker->args->endpoint = nullptr;
   handshaker->read_buffer_to_destroy = handshaker->args->read_buffer;
   handshaker->args->read_buffer = nullptr;
-  grpc_channel_args_destroy(exec_ctx, handshaker->args->args);
+  grpc_channel_args_destroy(handshaker->args->args);
   handshaker->args->args = nullptr;
 }
 
 // If the handshake failed or we're shutting down, clean up and invoke the
 // callback with the error.
-static void handshake_failed_locked(grpc_exec_ctx* exec_ctx,
-                                    http_connect_handshaker* handshaker,
+static void handshake_failed_locked(http_connect_handshaker* handshaker,
                                     grpc_error* error) {
   if (error == GRPC_ERROR_NONE) {
     // If we were shut down after an endpoint operation succeeded but
@@ -108,34 +105,32 @@ static void handshake_failed_locked(grpc_exec_ctx* exec_ctx,
     // before destroying them, even if we know that there are no
     // pending read/write callbacks.  This should be fixed, at which
     // point this can be removed.
-    grpc_endpoint_shutdown(exec_ctx, handshaker->args->endpoint,
-                           GRPC_ERROR_REF(error));
+    grpc_endpoint_shutdown(handshaker->args->endpoint, GRPC_ERROR_REF(error));
     // Not shutting down, so the handshake failed.  Clean up before
     // invoking the callback.
-    cleanup_args_for_failure_locked(exec_ctx, handshaker);
+    cleanup_args_for_failure_locked(handshaker);
     // Set shutdown to true so that subsequent calls to
     // http_connect_handshaker_shutdown() do nothing.
     handshaker->shutdown = true;
   }
   // Invoke callback.
-  GRPC_CLOSURE_SCHED(exec_ctx, handshaker->on_handshake_done, error);
+  GRPC_CLOSURE_SCHED(handshaker->on_handshake_done, error);
 }
 
 // Callback invoked when finished writing HTTP CONNECT request.
-static void on_write_done(grpc_exec_ctx* exec_ctx, void* arg,
-                          grpc_error* error) {
+static void on_write_done(void* arg, grpc_error* error) {
   http_connect_handshaker* handshaker = (http_connect_handshaker*)arg;
   gpr_mu_lock(&handshaker->mu);
   if (error != GRPC_ERROR_NONE || handshaker->shutdown) {
     // If the write failed or we're shutting down, clean up and invoke the
     // callback with the error.
-    handshake_failed_locked(exec_ctx, handshaker, GRPC_ERROR_REF(error));
+    handshake_failed_locked(handshaker, GRPC_ERROR_REF(error));
     gpr_mu_unlock(&handshaker->mu);
-    http_connect_handshaker_unref(exec_ctx, handshaker);
+    http_connect_handshaker_unref(handshaker);
   } else {
     // Otherwise, read the response.
     // The read callback inherits our ref to the handshaker.
-    grpc_endpoint_read(exec_ctx, handshaker->args->endpoint,
+    grpc_endpoint_read(handshaker->args->endpoint,
                        handshaker->args->read_buffer,
                        &handshaker->response_read_closure);
     gpr_mu_unlock(&handshaker->mu);
@@ -143,14 +138,13 @@ static void on_write_done(grpc_exec_ctx* exec_ctx, void* arg,
 }
 
 // Callback invoked for reading HTTP CONNECT response.
-static void on_read_done(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
+static void on_read_done(void* arg, grpc_error* error) {
   http_connect_handshaker* handshaker = (http_connect_handshaker*)arg;
   gpr_mu_lock(&handshaker->mu);
   if (error != GRPC_ERROR_NONE || handshaker->shutdown) {
     // If the read failed or we're shutting down, clean up and invoke the
     // callback with the error.
-    handshake_failed_locked(exec_ctx, handshaker, GRPC_ERROR_REF(error));
+    handshake_failed_locked(handshaker, GRPC_ERROR_REF(error));
     goto done;
   }
   // Add buffer to parser.
@@ -161,7 +155,7 @@ static void on_read_done(grpc_exec_ctx* exec_ctx, void* arg,
                                      handshaker->args->read_buffer->slices[i],
                                      &body_start_offset);
       if (error != GRPC_ERROR_NONE) {
-        handshake_failed_locked(exec_ctx, handshaker, error);
+        handshake_failed_locked(handshaker, error);
         goto done;
       }
       if (handshaker->http_parser.state == GRPC_HTTP_BODY) {
@@ -180,7 +174,7 @@ static void on_read_done(grpc_exec_ctx* exec_ctx, void* arg,
                                &handshaker->args->read_buffer->slices[i + 1],
                                handshaker->args->read_buffer->count - i - 1);
         grpc_slice_buffer_swap(handshaker->args->read_buffer, &tmp_buffer);
-        grpc_slice_buffer_destroy_internal(exec_ctx, &tmp_buffer);
+        grpc_slice_buffer_destroy_internal(&tmp_buffer);
         break;
       }
     }
@@ -197,9 +191,8 @@ static void on_read_done(grpc_exec_ctx* exec_ctx, void* arg,
   // complete (e.g., handling chunked transfer encoding or looking
   // at the Content-Length: header).
   if (handshaker->http_parser.state != GRPC_HTTP_BODY) {
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                               handshaker->args->read_buffer);
-    grpc_endpoint_read(exec_ctx, handshaker->args->endpoint,
+    grpc_slice_buffer_reset_and_unref_internal(handshaker->args->read_buffer);
+    grpc_endpoint_read(handshaker->args->endpoint,
                        handshaker->args->read_buffer,
                        &handshaker->response_read_closure);
     gpr_mu_unlock(&handshaker->mu);
@@ -213,48 +206,44 @@ static void on_read_done(grpc_exec_ctx* exec_ctx, void* arg,
                  handshaker->http_response.status);
     error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
     gpr_free(msg);
-    handshake_failed_locked(exec_ctx, handshaker, error);
+    handshake_failed_locked(handshaker, error);
     goto done;
   }
   // Success.  Invoke handshake-done callback.
-  GRPC_CLOSURE_SCHED(exec_ctx, handshaker->on_handshake_done, error);
+  GRPC_CLOSURE_SCHED(handshaker->on_handshake_done, error);
 done:
   // Set shutdown to true so that subsequent calls to
   // http_connect_handshaker_shutdown() do nothing.
   handshaker->shutdown = true;
   gpr_mu_unlock(&handshaker->mu);
-  http_connect_handshaker_unref(exec_ctx, handshaker);
+  http_connect_handshaker_unref(handshaker);
 }
 
 //
 // Public handshaker methods
 //
 
-static void http_connect_handshaker_destroy(grpc_exec_ctx* exec_ctx,
-                                            grpc_handshaker* handshaker_in) {
+static void http_connect_handshaker_destroy(grpc_handshaker* handshaker_in) {
   http_connect_handshaker* handshaker = (http_connect_handshaker*)handshaker_in;
-  http_connect_handshaker_unref(exec_ctx, handshaker);
+  http_connect_handshaker_unref(handshaker);
 }
 
-static void http_connect_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
-                                             grpc_handshaker* handshaker_in,
+static void http_connect_handshaker_shutdown(grpc_handshaker* handshaker_in,
                                              grpc_error* why) {
   http_connect_handshaker* handshaker = (http_connect_handshaker*)handshaker_in;
   gpr_mu_lock(&handshaker->mu);
   if (!handshaker->shutdown) {
     handshaker->shutdown = true;
-    grpc_endpoint_shutdown(exec_ctx, handshaker->args->endpoint,
-                           GRPC_ERROR_REF(why));
-    cleanup_args_for_failure_locked(exec_ctx, handshaker);
+    grpc_endpoint_shutdown(handshaker->args->endpoint, GRPC_ERROR_REF(why));
+    cleanup_args_for_failure_locked(handshaker);
   }
   gpr_mu_unlock(&handshaker->mu);
   GRPC_ERROR_UNREF(why);
 }
 
 static void http_connect_handshaker_do_handshake(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker_in,
-    grpc_tcp_server_acceptor* acceptor, grpc_closure* on_handshake_done,
-    grpc_handshaker_args* args) {
+    grpc_handshaker* handshaker_in, grpc_tcp_server_acceptor* acceptor,
+    grpc_closure* on_handshake_done, grpc_handshaker_args* args) {
   http_connect_handshaker* handshaker = (http_connect_handshaker*)handshaker_in;
   // Check for HTTP CONNECT channel arg.
   // If not found, invoke on_handshake_done without doing anything.
@@ -266,7 +255,7 @@ static void http_connect_handshaker_do_handshake(
     gpr_mu_lock(&handshaker->mu);
     handshaker->shutdown = true;
     gpr_mu_unlock(&handshaker->mu);
-    GRPC_CLOSURE_SCHED(exec_ctx, on_handshake_done, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(on_handshake_done, GRPC_ERROR_NONE);
     return;
   }
   GPR_ASSERT(arg->type == GRPC_ARG_STRING);
@@ -324,7 +313,7 @@ static void http_connect_handshaker_do_handshake(
   gpr_free(header_strings);
   // Take a new ref to be held by the write callback.
   gpr_ref(&handshaker->refcount);
-  grpc_endpoint_write(exec_ctx, args->endpoint, &handshaker->write_buffer,
+  grpc_endpoint_write(args->endpoint, &handshaker->write_buffer,
                       &handshaker->request_done_closure);
   gpr_mu_unlock(&handshaker->mu);
 }
@@ -355,14 +344,13 @@ static grpc_handshaker* grpc_http_connect_handshaker_create() {
 //
 
 static void handshaker_factory_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* factory,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr) {
+    grpc_handshaker_factory* factory, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr) {
   grpc_handshake_manager_add(handshake_mgr,
                              grpc_http_connect_handshaker_create());
 }
 
-static void handshaker_factory_destroy(grpc_exec_ctx* exec_ctx,
-                                       grpc_handshaker_factory* factory) {}
+static void handshaker_factory_destroy(grpc_handshaker_factory* factory) {}
 
 static const grpc_handshaker_factory_vtable handshaker_factory_vtable = {
     handshaker_factory_add_handshakers, handshaker_factory_destroy};
diff --git a/src/core/ext/filters/client_channel/http_proxy.cc b/src/core/ext/filters/client_channel/http_proxy.cc
index 405d8c0e55..2eafeee702 100644
--- a/src/core/ext/filters/client_channel/http_proxy.cc
+++ b/src/core/ext/filters/client_channel/http_proxy.cc
@@ -36,19 +36,18 @@
 
 /**
  * Parses the 'http_proxy' env var and returns the proxy hostname to resolve or
- * NULL on error. Also sets 'user_cred' to user credentials if present in the
+ * nullptr on error. Also sets 'user_cred' to user credentials if present in the
  * 'http_proxy' env var, otherwise leaves it unchanged. It is caller's
  * responsibility to gpr_free user_cred.
  */
-static char* get_http_proxy_server(grpc_exec_ctx* exec_ctx, char** user_cred) {
+static char* get_http_proxy_server(char** user_cred) {
   GPR_ASSERT(user_cred != nullptr);
   char* proxy_name = nullptr;
   char* uri_str = gpr_getenv("http_proxy");
   char** authority_strs = nullptr;
   size_t authority_nstrs;
   if (uri_str == nullptr) return nullptr;
-  grpc_uri* uri =
-      grpc_uri_parse(exec_ctx, uri_str, false /* suppress_errors */);
+  grpc_uri* uri = grpc_uri_parse(uri_str, false /* suppress_errors */);
   if (uri == nullptr || uri->authority == nullptr) {
     gpr_log(GPR_ERROR, "cannot parse value of 'http_proxy' env var");
     goto done;
@@ -82,18 +81,16 @@ done:
   return proxy_name;
 }
 
-static bool proxy_mapper_map_name(grpc_exec_ctx* exec_ctx,
-                                  grpc_proxy_mapper* mapper,
+static bool proxy_mapper_map_name(grpc_proxy_mapper* mapper,
                                   const char* server_uri,
                                   const grpc_channel_args* args,
                                   char** name_to_resolve,
                                   grpc_channel_args** new_args) {
   char* user_cred = nullptr;
-  *name_to_resolve = get_http_proxy_server(exec_ctx, &user_cred);
+  *name_to_resolve = get_http_proxy_server(&user_cred);
   if (*name_to_resolve == nullptr) return false;
   char* no_proxy_str = nullptr;
-  grpc_uri* uri =
-      grpc_uri_parse(exec_ctx, server_uri, false /* suppress_errors */);
+  grpc_uri* uri = grpc_uri_parse(server_uri, false /* suppress_errors */);
   if (uri == nullptr || uri->path[0] == '\0') {
     gpr_log(GPR_ERROR,
             "'http_proxy' environment variable set, but cannot "
@@ -174,8 +171,7 @@ no_use_proxy:
   return false;
 }
 
-static bool proxy_mapper_map_address(grpc_exec_ctx* exec_ctx,
-                                     grpc_proxy_mapper* mapper,
+static bool proxy_mapper_map_address(grpc_proxy_mapper* mapper,
                                      const grpc_resolved_address* address,
                                      const grpc_channel_args* args,
                                      grpc_resolved_address** new_address,
diff --git a/src/core/ext/filters/client_channel/lb_policy.cc b/src/core/ext/filters/client_channel/lb_policy.cc
index db566f1b56..7a5a8dec34 100644
--- a/src/core/ext/filters/client_channel/lb_policy.cc
+++ b/src/core/ext/filters/client_channel/lb_policy.cc
@@ -63,15 +63,13 @@ void grpc_lb_policy_ref(grpc_lb_policy* policy REF_FUNC_EXTRA_ARGS) {
   ref_mutate(policy, 1 << WEAK_REF_BITS, 0 REF_MUTATE_PASS_ARGS("STRONG_REF"));
 }
 
-static void shutdown_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void shutdown_locked(void* arg, grpc_error* error) {
   grpc_lb_policy* policy = (grpc_lb_policy*)arg;
-  policy->vtable->shutdown_locked(exec_ctx, policy);
-  GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, policy, "strong-unref");
+  policy->vtable->shutdown_locked(policy);
+  GRPC_LB_POLICY_WEAK_UNREF(policy, "strong-unref");
 }
 
-void grpc_lb_policy_unref(grpc_exec_ctx* exec_ctx,
-                          grpc_lb_policy* policy REF_FUNC_EXTRA_ARGS) {
+void grpc_lb_policy_unref(grpc_lb_policy* policy REF_FUNC_EXTRA_ARGS) {
   gpr_atm old_val =
       ref_mutate(policy, (gpr_atm)1 - (gpr_atm)(1 << WEAK_REF_BITS),
                  1 REF_MUTATE_PASS_ARGS("STRONG_UNREF"));
@@ -79,13 +77,11 @@ void grpc_lb_policy_unref(grpc_exec_ctx* exec_ctx,
   gpr_atm check = 1 << WEAK_REF_BITS;
   if ((old_val & mask) == check) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_CREATE(shutdown_locked, policy,
                             grpc_combiner_scheduler(policy->combiner)),
         GRPC_ERROR_NONE);
   } else {
-    grpc_lb_policy_weak_unref(exec_ctx,
-                              policy REF_FUNC_PASS_ARGS("strong-unref"));
+    grpc_lb_policy_weak_unref(policy REF_FUNC_PASS_ARGS("strong-unref"));
   }
 }
 
@@ -93,88 +89,76 @@ void grpc_lb_policy_weak_ref(grpc_lb_policy* policy REF_FUNC_EXTRA_ARGS) {
   ref_mutate(policy, 1, 0 REF_MUTATE_PASS_ARGS("WEAK_REF"));
 }
 
-void grpc_lb_policy_weak_unref(grpc_exec_ctx* exec_ctx,
-                               grpc_lb_policy* policy REF_FUNC_EXTRA_ARGS) {
+void grpc_lb_policy_weak_unref(grpc_lb_policy* policy REF_FUNC_EXTRA_ARGS) {
   gpr_atm old_val =
       ref_mutate(policy, -(gpr_atm)1, 1 REF_MUTATE_PASS_ARGS("WEAK_UNREF"));
   if (old_val == 1) {
-    grpc_pollset_set_destroy(exec_ctx, policy->interested_parties);
+    grpc_pollset_set_destroy(policy->interested_parties);
     grpc_combiner* combiner = policy->combiner;
-    policy->vtable->destroy(exec_ctx, policy);
-    GRPC_COMBINER_UNREF(exec_ctx, combiner, "lb_policy");
+    policy->vtable->destroy(policy);
+    GRPC_COMBINER_UNREF(combiner, "lb_policy");
   }
 }
 
-int grpc_lb_policy_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+int grpc_lb_policy_pick_locked(grpc_lb_policy* policy,
                                const grpc_lb_policy_pick_args* pick_args,
                                grpc_connected_subchannel** target,
                                grpc_call_context_element* context,
                                void** user_data, grpc_closure* on_complete) {
-  return policy->vtable->pick_locked(exec_ctx, policy, pick_args, target,
-                                     context, user_data, on_complete);
+  return policy->vtable->pick_locked(policy, pick_args, target, context,
+                                     user_data, on_complete);
 }
 
-void grpc_lb_policy_cancel_pick_locked(grpc_exec_ctx* exec_ctx,
-                                       grpc_lb_policy* policy,
+void grpc_lb_policy_cancel_pick_locked(grpc_lb_policy* policy,
                                        grpc_connected_subchannel** target,
                                        grpc_error* error) {
-  policy->vtable->cancel_pick_locked(exec_ctx, policy, target, error);
+  policy->vtable->cancel_pick_locked(policy, target, error);
 }
 
-void grpc_lb_policy_cancel_picks_locked(grpc_exec_ctx* exec_ctx,
-                                        grpc_lb_policy* policy,
+void grpc_lb_policy_cancel_picks_locked(grpc_lb_policy* policy,
                                         uint32_t initial_metadata_flags_mask,
                                         uint32_t initial_metadata_flags_eq,
                                         grpc_error* error) {
-  policy->vtable->cancel_picks_locked(exec_ctx, policy,
-                                      initial_metadata_flags_mask,
+  policy->vtable->cancel_picks_locked(policy, initial_metadata_flags_mask,
                                       initial_metadata_flags_eq, error);
 }
 
-void grpc_lb_policy_exit_idle_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_lb_policy* policy) {
-  policy->vtable->exit_idle_locked(exec_ctx, policy);
+void grpc_lb_policy_exit_idle_locked(grpc_lb_policy* policy) {
+  policy->vtable->exit_idle_locked(policy);
 }
 
-void grpc_lb_policy_ping_one_locked(grpc_exec_ctx* exec_ctx,
-                                    grpc_lb_policy* policy,
-                                    grpc_closure* closure) {
-  policy->vtable->ping_one_locked(exec_ctx, policy, closure);
+void grpc_lb_policy_ping_one_locked(grpc_lb_policy* policy,
+                                    grpc_closure* on_initiate,
+                                    grpc_closure* on_ack) {
+  policy->vtable->ping_one_locked(policy, on_initiate, on_ack);
 }
 
 void grpc_lb_policy_notify_on_state_change_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-    grpc_connectivity_state* state, grpc_closure* closure) {
-  policy->vtable->notify_on_state_change_locked(exec_ctx, policy, state,
-                                                closure);
+    grpc_lb_policy* policy, grpc_connectivity_state* state,
+    grpc_closure* closure) {
+  policy->vtable->notify_on_state_change_locked(policy, state, closure);
 }
 
 grpc_connectivity_state grpc_lb_policy_check_connectivity_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-    grpc_error** connectivity_error) {
-  return policy->vtable->check_connectivity_locked(exec_ctx, policy,
-                                                   connectivity_error);
+    grpc_lb_policy* policy, grpc_error** connectivity_error) {
+  return policy->vtable->check_connectivity_locked(policy, connectivity_error);
 }
 
-void grpc_lb_policy_update_locked(grpc_exec_ctx* exec_ctx,
-                                  grpc_lb_policy* policy,
+void grpc_lb_policy_update_locked(grpc_lb_policy* policy,
                                   const grpc_lb_policy_args* lb_policy_args) {
-  policy->vtable->update_locked(exec_ctx, policy, lb_policy_args);
+  policy->vtable->update_locked(policy, lb_policy_args);
 }
 
 void grpc_lb_policy_set_reresolve_closure_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-    grpc_closure* request_reresolution) {
-  policy->vtable->set_reresolve_closure_locked(exec_ctx, policy,
-                                               request_reresolution);
+    grpc_lb_policy* policy, grpc_closure* request_reresolution) {
+  policy->vtable->set_reresolve_closure_locked(policy, request_reresolution);
 }
 
-void grpc_lb_policy_try_reresolve(grpc_exec_ctx* exec_ctx,
-                                  grpc_lb_policy* policy,
+void grpc_lb_policy_try_reresolve(grpc_lb_policy* policy,
                                   grpc_core::TraceFlag* grpc_lb_trace,
                                   grpc_error* error) {
   if (policy->request_reresolution != nullptr) {
-    GRPC_CLOSURE_SCHED(exec_ctx, policy->request_reresolution, error);
+    GRPC_CLOSURE_SCHED(policy->request_reresolution, error);
     policy->request_reresolution = nullptr;
     if (grpc_lb_trace->enabled()) {
       gpr_log(GPR_DEBUG,
diff --git a/src/core/ext/filters/client_channel/lb_policy.h b/src/core/ext/filters/client_channel/lb_policy.h
index d3159eebf3..3572c97ed1 100644
--- a/src/core/ext/filters/client_channel/lb_policy.h
+++ b/src/core/ext/filters/client_channel/lb_policy.h
@@ -55,53 +55,50 @@ typedef struct grpc_lb_policy_pick_args {
 } grpc_lb_policy_pick_args;
 
 struct grpc_lb_policy_vtable {
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy);
-  void (*shutdown_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy);
+  void (*destroy)(grpc_lb_policy* policy);
+  void (*shutdown_locked)(grpc_lb_policy* policy);
 
   /** \see grpc_lb_policy_pick */
-  int (*pick_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+  int (*pick_locked)(grpc_lb_policy* policy,
                      const grpc_lb_policy_pick_args* pick_args,
                      grpc_connected_subchannel** target,
                      grpc_call_context_element* context, void** user_data,
                      grpc_closure* on_complete);
 
   /** \see grpc_lb_policy_cancel_pick */
-  void (*cancel_pick_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+  void (*cancel_pick_locked)(grpc_lb_policy* policy,
                              grpc_connected_subchannel** target,
                              grpc_error* error);
 
   /** \see grpc_lb_policy_cancel_picks */
-  void (*cancel_picks_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+  void (*cancel_picks_locked)(grpc_lb_policy* policy,
                               uint32_t initial_metadata_flags_mask,
                               uint32_t initial_metadata_flags_eq,
                               grpc_error* error);
 
   /** \see grpc_lb_policy_ping_one */
-  void (*ping_one_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-                          grpc_closure* closure);
+  void (*ping_one_locked)(grpc_lb_policy* policy, grpc_closure* on_initiate,
+                          grpc_closure* on_ack);
 
   /** Try to enter a READY connectivity state */
-  void (*exit_idle_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy);
+  void (*exit_idle_locked)(grpc_lb_policy* policy);
 
   /** check the current connectivity of the lb_policy */
   grpc_connectivity_state (*check_connectivity_locked)(
-      grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-      grpc_error** connectivity_error);
+      grpc_lb_policy* policy, grpc_error** connectivity_error);
 
   /** call notify when the connectivity state of a channel changes from *state.
       Updates *state with the new state of the policy. Calling with a NULL \a
       state cancels the subscription.  */
-  void (*notify_on_state_change_locked)(grpc_exec_ctx* exec_ctx,
-                                        grpc_lb_policy* policy,
+  void (*notify_on_state_change_locked)(grpc_lb_policy* policy,
                                         grpc_connectivity_state* state,
                                         grpc_closure* closure);
 
-  void (*update_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+  void (*update_locked)(grpc_lb_policy* policy,
                         const grpc_lb_policy_args* args);
 
   /** \see grpc_lb_policy_set_reresolve_closure */
-  void (*set_reresolve_closure_locked)(grpc_exec_ctx* exec_ctx,
-                                       grpc_lb_policy* policy,
+  void (*set_reresolve_closure_locked)(grpc_lb_policy* policy,
                                        grpc_closure* request_reresolution);
 };
 
@@ -110,33 +107,33 @@ struct grpc_lb_policy_vtable {
 /* Strong references: the policy will shutdown when they reach zero */
 #define GRPC_LB_POLICY_REF(p, r) \
   grpc_lb_policy_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_LB_POLICY_UNREF(exec_ctx, p, r) \
-  grpc_lb_policy_unref((exec_ctx), (p), __FILE__, __LINE__, (r))
+#define GRPC_LB_POLICY_UNREF(p, r) \
+  grpc_lb_policy_unref((p), __FILE__, __LINE__, (r))
 
 /* Weak references: they don't prevent the shutdown of the LB policy. When no
  * strong references are left but there are still weak ones, shutdown is called.
  * Once the weak reference also reaches zero, the LB policy is destroyed. */
 #define GRPC_LB_POLICY_WEAK_REF(p, r) \
   grpc_lb_policy_weak_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, p, r) \
-  grpc_lb_policy_weak_unref((exec_ctx), (p), __FILE__, __LINE__, (r))
+#define GRPC_LB_POLICY_WEAK_UNREF(p, r) \
+  grpc_lb_policy_weak_unref((p), __FILE__, __LINE__, (r))
 void grpc_lb_policy_ref(grpc_lb_policy* policy, const char* file, int line,
                         const char* reason);
-void grpc_lb_policy_unref(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-                          const char* file, int line, const char* reason);
+void grpc_lb_policy_unref(grpc_lb_policy* policy, const char* file, int line,
+                          const char* reason);
 void grpc_lb_policy_weak_ref(grpc_lb_policy* policy, const char* file, int line,
                              const char* reason);
-void grpc_lb_policy_weak_unref(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-                               const char* file, int line, const char* reason);
+void grpc_lb_policy_weak_unref(grpc_lb_policy* policy, const char* file,
+                               int line, const char* reason);
 #else
 #define GRPC_LB_POLICY_REF(p, r) grpc_lb_policy_ref((p))
-#define GRPC_LB_POLICY_UNREF(cl, p, r) grpc_lb_policy_unref((cl), (p))
+#define GRPC_LB_POLICY_UNREF(p, r) grpc_lb_policy_unref((p))
 #define GRPC_LB_POLICY_WEAK_REF(p, r) grpc_lb_policy_weak_ref((p))
-#define GRPC_LB_POLICY_WEAK_UNREF(cl, p, r) grpc_lb_policy_weak_unref((cl), (p))
+#define GRPC_LB_POLICY_WEAK_UNREF(p, r) grpc_lb_policy_weak_unref((p))
 void grpc_lb_policy_ref(grpc_lb_policy* policy);
-void grpc_lb_policy_unref(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy);
+void grpc_lb_policy_unref(grpc_lb_policy* policy);
 void grpc_lb_policy_weak_ref(grpc_lb_policy* policy);
-void grpc_lb_policy_weak_unref(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy);
+void grpc_lb_policy_weak_unref(grpc_lb_policy* policy);
 #endif
 
 /** called by concrete implementations to initialize the base struct */
@@ -161,7 +158,7 @@ void grpc_lb_policy_init(grpc_lb_policy* policy,
 
     Any IO should be done under the \a interested_parties \a grpc_pollset_set
     in the \a grpc_lb_policy struct. */
-int grpc_lb_policy_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+int grpc_lb_policy_pick_locked(grpc_lb_policy* policy,
                                const grpc_lb_policy_pick_args* pick_args,
                                grpc_connected_subchannel** target,
                                grpc_call_context_element* context,
@@ -169,55 +166,48 @@ int grpc_lb_policy_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
 
 /** Perform a connected subchannel ping (see \a grpc_connected_subchannel_ping)
     against one of the connected subchannels managed by \a policy. */
-void grpc_lb_policy_ping_one_locked(grpc_exec_ctx* exec_ctx,
-                                    grpc_lb_policy* policy,
-                                    grpc_closure* closure);
+void grpc_lb_policy_ping_one_locked(grpc_lb_policy* policy,
+                                    grpc_closure* on_initiate,
+                                    grpc_closure* on_ack);
 
 /** Cancel picks for \a target.
     The \a on_complete callback of the pending picks will be invoked with \a
     *target set to NULL. */
-void grpc_lb_policy_cancel_pick_locked(grpc_exec_ctx* exec_ctx,
-                                       grpc_lb_policy* policy,
+void grpc_lb_policy_cancel_pick_locked(grpc_lb_policy* policy,
                                        grpc_connected_subchannel** target,
                                        grpc_error* error);
 
 /** Cancel all pending picks for which their \a initial_metadata_flags (as given
     in the call to \a grpc_lb_policy_pick) matches \a initial_metadata_flags_eq
     when AND'd with \a initial_metadata_flags_mask */
-void grpc_lb_policy_cancel_picks_locked(grpc_exec_ctx* exec_ctx,
-                                        grpc_lb_policy* policy,
+void grpc_lb_policy_cancel_picks_locked(grpc_lb_policy* policy,
                                         uint32_t initial_metadata_flags_mask,
                                         uint32_t initial_metadata_flags_eq,
                                         grpc_error* error);
 
 /** Try to enter a READY connectivity state */
-void grpc_lb_policy_exit_idle_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_lb_policy* policy);
+void grpc_lb_policy_exit_idle_locked(grpc_lb_policy* policy);
 
 /* Call notify when the connectivity state of a channel changes from \a *state.
  * Updates \a *state with the new state of the policy */
 void grpc_lb_policy_notify_on_state_change_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-    grpc_connectivity_state* state, grpc_closure* closure);
+    grpc_lb_policy* policy, grpc_connectivity_state* state,
+    grpc_closure* closure);
 
 grpc_connectivity_state grpc_lb_policy_check_connectivity_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-    grpc_error** connectivity_error);
+    grpc_lb_policy* policy, grpc_error** connectivity_error);
 
 /** Update \a policy with \a lb_policy_args. */
-void grpc_lb_policy_update_locked(grpc_exec_ctx* exec_ctx,
-                                  grpc_lb_policy* policy,
+void grpc_lb_policy_update_locked(grpc_lb_policy* policy,
                                   const grpc_lb_policy_args* lb_policy_args);
 
 /** Set the re-resolution closure to \a request_reresolution. */
 void grpc_lb_policy_set_reresolve_closure_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-    grpc_closure* request_reresolution);
+    grpc_lb_policy* policy, grpc_closure* request_reresolution);
 
 /** Try to request a re-resolution. It's NOT a public API; it's only for use by
     the LB policy implementations. */
-void grpc_lb_policy_try_reresolve(grpc_exec_ctx* exec_ctx,
-                                  grpc_lb_policy* policy,
+void grpc_lb_policy_try_reresolve(grpc_lb_policy* policy,
                                   grpc_core::TraceFlag* grpc_lb_trace,
                                   grpc_error* error);
 
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc
index 6d9fadaf30..3eedb08ecc 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc
@@ -25,14 +25,12 @@
 #include "src/core/lib/iomgr/error.h"
 #include "src/core/lib/profiling/timers.h"
 
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 typedef struct {
   // Stats object to update.
@@ -47,28 +45,24 @@ typedef struct {
   bool recv_initial_metadata_succeeded;
 } call_data;
 
-static void on_complete_for_send(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void on_complete_for_send(void* arg, grpc_error* error) {
   call_data* calld = (call_data*)arg;
   if (error == GRPC_ERROR_NONE) {
     calld->send_initial_metadata_succeeded = true;
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_on_complete_for_send,
-                   GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(calld->original_on_complete_for_send, GRPC_ERROR_REF(error));
 }
 
-static void recv_initial_metadata_ready(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void recv_initial_metadata_ready(void* arg, grpc_error* error) {
   call_data* calld = (call_data*)arg;
   if (error == GRPC_ERROR_NONE) {
     calld->recv_initial_metadata_succeeded = true;
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_recv_initial_metadata_ready,
+  GRPC_CLOSURE_RUN(calld->original_recv_initial_metadata_ready,
                    GRPC_ERROR_REF(error));
 }
 
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   // Get stats object from context and take a ref.
@@ -81,7 +75,7 @@ static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   call_data* calld = (call_data*)elem->call_data;
@@ -96,8 +90,7 @@ static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
 }
 
 static void start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   GPR_TIMER_BEGIN("clr_start_transport_stream_op_batch", 0);
   // Intercept send_initial_metadata.
@@ -118,7 +111,7 @@ static void start_transport_stream_op_batch(
         &calld->recv_initial_metadata_ready;
   }
   // Chain to next filter.
-  grpc_call_next_op(exec_ctx, elem, batch);
+  grpc_call_next_op(elem, batch);
   GPR_TIMER_END("clr_start_transport_stream_op_batch", 0);
 }
 
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc
index d8137636b8..dd6fc602ab 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc
@@ -131,12 +131,12 @@ grpc_core::TraceFlag grpc_lb_glb_trace(false, "glb");
 /* add lb_token of selected subchannel (address) to the call's initial
  * metadata */
 static grpc_error* initial_metadata_add_lb_token(
-    grpc_exec_ctx* exec_ctx, grpc_metadata_batch* initial_metadata,
+    grpc_metadata_batch* initial_metadata,
     grpc_linked_mdelem* lb_token_mdelem_storage, grpc_mdelem lb_token) {
   GPR_ASSERT(lb_token_mdelem_storage != nullptr);
   GPR_ASSERT(!GRPC_MDISNULL(lb_token));
-  return grpc_metadata_batch_add_tail(exec_ctx, initial_metadata,
-                                      lb_token_mdelem_storage, lb_token);
+  return grpc_metadata_batch_add_tail(initial_metadata, lb_token_mdelem_storage,
+                                      lb_token);
 }
 
 static void destroy_client_stats(void* arg) {
@@ -186,20 +186,19 @@ typedef struct wrapped_rr_closure_arg {
 /* The \a on_complete closure passed as part of the pick requires keeping a
  * reference to its associated round robin instance. We wrap this closure in
  * order to unref the round robin instance upon its invocation */
-static void wrapped_rr_closure(grpc_exec_ctx* exec_ctx, void* arg,
-                               grpc_error* error) {
+static void wrapped_rr_closure(void* arg, grpc_error* error) {
   wrapped_rr_closure_arg* wc_arg = (wrapped_rr_closure_arg*)arg;
 
   GPR_ASSERT(wc_arg->wrapped_closure != nullptr);
-  GRPC_CLOSURE_SCHED(exec_ctx, wc_arg->wrapped_closure, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_SCHED(wc_arg->wrapped_closure, GRPC_ERROR_REF(error));
 
   if (wc_arg->rr_policy != nullptr) {
-    /* if *target is NULL, no pick has been made by the RR policy (eg, all
+    /* if *target is nullptr, no pick has been made by the RR policy (eg, all
      * addresses failed to connect). There won't be any user_data/token
      * available */
     if (*wc_arg->target != nullptr) {
       if (!GRPC_MDISNULL(wc_arg->lb_token)) {
-        initial_metadata_add_lb_token(exec_ctx, wc_arg->initial_metadata,
+        initial_metadata_add_lb_token(wc_arg->initial_metadata,
                                       wc_arg->lb_token_mdelem_storage,
                                       GRPC_MDELEM_REF(wc_arg->lb_token));
       } else {
@@ -221,7 +220,7 @@ static void wrapped_rr_closure(grpc_exec_ctx* exec_ctx, void* arg,
       gpr_log(GPR_INFO, "[grpclb %p] Unreffing RR %p", wc_arg->glb_policy,
               wc_arg->rr_policy);
     }
-    GRPC_LB_POLICY_UNREF(exec_ctx, wc_arg->rr_policy, "wrapped_rr_closure");
+    GRPC_LB_POLICY_UNREF(wc_arg->rr_policy, "wrapped_rr_closure");
   }
   GPR_ASSERT(wc_arg->free_when_done != nullptr);
   gpr_free(wc_arg->free_when_done);
@@ -241,8 +240,8 @@ typedef struct pending_pick {
   /* original pick()'s arguments */
   grpc_lb_policy_pick_args pick_args;
 
-  /* output argument where to store the pick()ed connected subchannel, or NULL
-   * upon error. */
+  /* output argument where to store the pick()ed connected subchannel, or
+   * nullptr upon error. */
   grpc_connected_subchannel** target;
 
   /* args for wrapped_on_complete */
@@ -275,18 +274,30 @@ static void add_pending_pick(pending_pick** root,
 typedef struct pending_ping {
   struct pending_ping* next;
 
-  /* args for wrapped_notify */
-  wrapped_rr_closure_arg wrapped_notify_arg;
+  /* args for sending the ping */
+  wrapped_rr_closure_arg* on_initiate;
+  wrapped_rr_closure_arg* on_ack;
 } pending_ping;
 
-static void add_pending_ping(pending_ping** root, grpc_closure* notify) {
+static void add_pending_ping(pending_ping** root, grpc_closure* on_initiate,
+                             grpc_closure* on_ack) {
   pending_ping* pping = (pending_ping*)gpr_zalloc(sizeof(*pping));
-  pping->wrapped_notify_arg.wrapped_closure = notify;
-  pping->wrapped_notify_arg.free_when_done = pping;
+  if (on_initiate != nullptr) {
+    pping->on_initiate =
+        (wrapped_rr_closure_arg*)gpr_zalloc(sizeof(*pping->on_initiate));
+    pping->on_initiate->wrapped_closure = on_initiate;
+    pping->on_initiate->free_when_done = pping->on_initiate;
+    GRPC_CLOSURE_INIT(&pping->on_initiate->wrapper_closure, wrapped_rr_closure,
+                      &pping->on_initiate, grpc_schedule_on_exec_ctx);
+  }
+  if (on_ack != nullptr) {
+    pping->on_ack = (wrapped_rr_closure_arg*)gpr_zalloc(sizeof(*pping->on_ack));
+    pping->on_ack->wrapped_closure = on_ack;
+    pping->on_ack->free_when_done = pping->on_ack;
+    GRPC_CLOSURE_INIT(&pping->on_ack->wrapper_closure, wrapped_rr_closure,
+                      &pping->on_ack, grpc_schedule_on_exec_ctx);
+  }
   pping->next = *root;
-  GRPC_CLOSURE_INIT(&pping->wrapped_notify_arg.wrapper_closure,
-                    wrapped_rr_closure, &pping->wrapped_notify_arg,
-                    grpc_schedule_on_exec_ctx);
   *root = pping;
 }
 
@@ -328,8 +339,8 @@ typedef struct glb_lb_policy {
   /** connectivity state of the LB channel */
   grpc_connectivity_state lb_channel_connectivity;
 
-  /** stores the deserialized response from the LB. May be NULL until one such
-   * response has arrived. */
+  /** stores the deserialized response from the LB. May be nullptr until one
+   * such response has arrived. */
   grpc_grpclb_serverlist* serverlist;
 
   /** Index into serverlist for next pick.
@@ -459,9 +470,9 @@ static void* lb_token_copy(void* token) {
              ? nullptr
              : (void*)GRPC_MDELEM_REF(grpc_mdelem{(uintptr_t)token}).payload;
 }
-static void lb_token_destroy(grpc_exec_ctx* exec_ctx, void* token) {
+static void lb_token_destroy(void* token) {
   if (token != nullptr) {
-    GRPC_MDELEM_UNREF(exec_ctx, grpc_mdelem{(uintptr_t)token});
+    GRPC_MDELEM_UNREF(grpc_mdelem{(uintptr_t)token});
   }
 }
 static int lb_token_cmp(void* token1, void* token2) {
@@ -497,7 +508,7 @@ static void parse_server(const grpc_grpclb_server* server,
 
 /* Returns addresses extracted from \a serverlist. */
 static grpc_lb_addresses* process_serverlist_locked(
-    grpc_exec_ctx* exec_ctx, const grpc_grpclb_serverlist* serverlist) {
+    const grpc_grpclb_serverlist* serverlist) {
   size_t num_valid = 0;
   /* first pass: count how many are valid in order to allocate the necessary
    * memory in a single block */
@@ -528,9 +539,9 @@ static grpc_lb_addresses* process_serverlist_locked(
           strnlen(server->load_balance_token, lb_token_max_length);
       grpc_slice lb_token_mdstr = grpc_slice_from_copied_buffer(
           server->load_balance_token, lb_token_length);
-      user_data = (void*)grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_LB_TOKEN,
-                                                 lb_token_mdstr)
-                      .payload;
+      user_data =
+          (void*)grpc_mdelem_from_slices(GRPC_MDSTR_LB_TOKEN, lb_token_mdstr)
+              .payload;
     } else {
       char* uri = grpc_sockaddr_to_uri(&addr);
       gpr_log(GPR_INFO,
@@ -552,7 +563,7 @@ static grpc_lb_addresses* process_serverlist_locked(
 
 /* Returns the backend addresses extracted from the given addresses */
 static grpc_lb_addresses* extract_backend_addresses_locked(
-    grpc_exec_ctx* exec_ctx, const grpc_lb_addresses* addresses) {
+    const grpc_lb_addresses* addresses) {
   /* first pass: count the number of backend addresses */
   size_t num_backends = 0;
   for (size_t i = 0; i < addresses->num_addresses; ++i) {
@@ -577,8 +588,8 @@ static grpc_lb_addresses* extract_backend_addresses_locked(
 }
 
 static void update_lb_connectivity_status_locked(
-    grpc_exec_ctx* exec_ctx, glb_lb_policy* glb_policy,
-    grpc_connectivity_state rr_state, grpc_error* rr_state_error) {
+    glb_lb_policy* glb_policy, grpc_connectivity_state rr_state,
+    grpc_error* rr_state_error) {
   const grpc_connectivity_state curr_glb_state =
       grpc_connectivity_state_check(&glb_policy->state_tracker);
 
@@ -630,7 +641,7 @@ static void update_lb_connectivity_status_locked(
         glb_policy, grpc_connectivity_state_name(rr_state),
         glb_policy->rr_policy);
   }
-  grpc_connectivity_state_set(exec_ctx, &glb_policy->state_tracker, rr_state,
+  grpc_connectivity_state_set(&glb_policy->state_tracker, rr_state,
                               rr_state_error,
                               "update_lb_connectivity_status_locked");
 }
@@ -641,9 +652,9 @@ static void update_lb_connectivity_status_locked(
  * If \a force_async is true, then we will manually schedule the
  * completion callback even if the pick is available immediately. */
 static bool pick_from_internal_rr_locked(
-    grpc_exec_ctx* exec_ctx, glb_lb_policy* glb_policy,
-    const grpc_lb_policy_pick_args* pick_args, bool force_async,
-    grpc_connected_subchannel** target, wrapped_rr_closure_arg* wc_arg) {
+    glb_lb_policy* glb_policy, const grpc_lb_policy_pick_args* pick_args,
+    bool force_async, grpc_connected_subchannel** target,
+    wrapped_rr_closure_arg* wc_arg) {
   // Check for drops if we are not using fallback backend addresses.
   if (glb_policy->serverlist != nullptr) {
     // Look at the index into the serverlist to see if we should drop this call.
@@ -658,7 +669,7 @@ static bool pick_from_internal_rr_locked(
         gpr_log(GPR_INFO, "[grpclb %p] Unreffing RR %p for drop", glb_policy,
                 wc_arg->rr_policy);
       }
-      GRPC_LB_POLICY_UNREF(exec_ctx, wc_arg->rr_policy, "glb_pick_sync");
+      GRPC_LB_POLICY_UNREF(wc_arg->rr_policy, "glb_pick_sync");
       // Update client load reporting stats to indicate the number of
       // dropped calls.  Note that we have to do this here instead of in
       // the client_load_reporting filter, because we do not create a
@@ -670,7 +681,7 @@ static bool pick_from_internal_rr_locked(
       grpc_grpclb_client_stats_unref(wc_arg->client_stats);
       if (force_async) {
         GPR_ASSERT(wc_arg->wrapped_closure != nullptr);
-        GRPC_CLOSURE_SCHED(exec_ctx, wc_arg->wrapped_closure, GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(wc_arg->wrapped_closure, GRPC_ERROR_NONE);
         gpr_free(wc_arg->free_when_done);
         return false;
       }
@@ -680,7 +691,7 @@ static bool pick_from_internal_rr_locked(
   }
   // Pick via the RR policy.
   const bool pick_done = grpc_lb_policy_pick_locked(
-      exec_ctx, wc_arg->rr_policy, pick_args, target, wc_arg->context,
+      wc_arg->rr_policy, pick_args, target, wc_arg->context,
       (void**)&wc_arg->lb_token, &wc_arg->wrapper_closure);
   if (pick_done) {
     /* synchronous grpc_lb_policy_pick call. Unref the RR policy. */
@@ -688,9 +699,9 @@ static bool pick_from_internal_rr_locked(
       gpr_log(GPR_INFO, "[grpclb %p] Unreffing RR %p", glb_policy,
               wc_arg->rr_policy);
     }
-    GRPC_LB_POLICY_UNREF(exec_ctx, wc_arg->rr_policy, "glb_pick_sync");
+    GRPC_LB_POLICY_UNREF(wc_arg->rr_policy, "glb_pick_sync");
     /* add the load reporting initial metadata */
-    initial_metadata_add_lb_token(exec_ctx, pick_args->initial_metadata,
+    initial_metadata_add_lb_token(pick_args->initial_metadata,
                                   pick_args->lb_token_mdelem_storage,
                                   GRPC_MDELEM_REF(wc_arg->lb_token));
     // Pass on client stats via context. Passes ownership of the reference.
@@ -699,7 +710,7 @@ static bool pick_from_internal_rr_locked(
     wc_arg->context[GRPC_GRPCLB_CLIENT_STATS].destroy = destroy_client_stats;
     if (force_async) {
       GPR_ASSERT(wc_arg->wrapped_closure != nullptr);
-      GRPC_CLOSURE_SCHED(exec_ctx, wc_arg->wrapped_closure, GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(wc_arg->wrapped_closure, GRPC_ERROR_NONE);
       gpr_free(wc_arg->free_when_done);
       return false;
     }
@@ -712,12 +723,11 @@ static bool pick_from_internal_rr_locked(
   return pick_done;
 }
 
-static grpc_lb_policy_args* lb_policy_args_create(grpc_exec_ctx* exec_ctx,
-                                                  glb_lb_policy* glb_policy) {
+static grpc_lb_policy_args* lb_policy_args_create(glb_lb_policy* glb_policy) {
   grpc_lb_addresses* addresses;
   if (glb_policy->serverlist != nullptr) {
     GPR_ASSERT(glb_policy->serverlist->num_servers > 0);
-    addresses = process_serverlist_locked(exec_ctx, glb_policy->serverlist);
+    addresses = process_serverlist_locked(glb_policy->serverlist);
   } else {
     // If rr_handover_locked() is invoked when we haven't received any
     // serverlist from the balancer, we use the fallback backends returned by
@@ -737,24 +747,21 @@ static grpc_lb_policy_args* lb_policy_args_create(grpc_exec_ctx* exec_ctx,
   args->args = grpc_channel_args_copy_and_add_and_remove(
       glb_policy->args, keys_to_remove, GPR_ARRAY_SIZE(keys_to_remove), &arg,
       1);
-  grpc_lb_addresses_destroy(exec_ctx, addresses);
+  grpc_lb_addresses_destroy(addresses);
   return args;
 }
 
-static void lb_policy_args_destroy(grpc_exec_ctx* exec_ctx,
-                                   grpc_lb_policy_args* args) {
-  grpc_channel_args_destroy(exec_ctx, args->args);
+static void lb_policy_args_destroy(grpc_lb_policy_args* args) {
+  grpc_channel_args_destroy(args->args);
   gpr_free(args);
 }
 
-static void glb_rr_connectivity_changed_locked(grpc_exec_ctx* exec_ctx,
-                                               void* arg, grpc_error* error);
-static void create_rr_locked(grpc_exec_ctx* exec_ctx, glb_lb_policy* glb_policy,
+static void glb_rr_connectivity_changed_locked(void* arg, grpc_error* error);
+static void create_rr_locked(glb_lb_policy* glb_policy,
                              grpc_lb_policy_args* args) {
   GPR_ASSERT(glb_policy->rr_policy == nullptr);
 
-  grpc_lb_policy* new_rr_policy =
-      grpc_lb_policy_create(exec_ctx, "round_robin", args);
+  grpc_lb_policy* new_rr_policy = grpc_lb_policy_create("round_robin", args);
   if (new_rr_policy == nullptr) {
     gpr_log(GPR_ERROR,
             "[grpclb %p] Failure creating a RoundRobin policy for serverlist "
@@ -767,21 +774,19 @@ static void create_rr_locked(grpc_exec_ctx* exec_ctx, glb_lb_policy* glb_policy,
     return;
   }
   grpc_lb_policy_set_reresolve_closure_locked(
-      exec_ctx, new_rr_policy, glb_policy->base.request_reresolution);
+      new_rr_policy, glb_policy->base.request_reresolution);
   glb_policy->base.request_reresolution = nullptr;
   glb_policy->rr_policy = new_rr_policy;
   grpc_error* rr_state_error = nullptr;
   const grpc_connectivity_state rr_state =
-      grpc_lb_policy_check_connectivity_locked(exec_ctx, glb_policy->rr_policy,
+      grpc_lb_policy_check_connectivity_locked(glb_policy->rr_policy,
                                                &rr_state_error);
   /* Connectivity state is a function of the RR policy updated/created */
-  update_lb_connectivity_status_locked(exec_ctx, glb_policy, rr_state,
-                                       rr_state_error);
+  update_lb_connectivity_status_locked(glb_policy, rr_state, rr_state_error);
   /* Add the gRPC LB's interested_parties pollset_set to that of the newly
    * created RR policy. This will make the RR policy progress upon activity on
    * gRPC LB, which in turn is tied to the application's call */
-  grpc_pollset_set_add_pollset_set(exec_ctx,
-                                   glb_policy->rr_policy->interested_parties,
+  grpc_pollset_set_add_pollset_set(glb_policy->rr_policy->interested_parties,
                                    glb_policy->base.interested_parties);
 
   /* Allocate the data for the tracking of the new RR policy's connectivity.
@@ -796,10 +801,10 @@ static void create_rr_locked(grpc_exec_ctx* exec_ctx, glb_lb_policy* glb_policy,
 
   /* Subscribe to changes to the connectivity of the new RR */
   GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "glb_rr_connectivity_cb");
-  grpc_lb_policy_notify_on_state_change_locked(exec_ctx, glb_policy->rr_policy,
+  grpc_lb_policy_notify_on_state_change_locked(glb_policy->rr_policy,
                                                &rr_connectivity->state,
                                                &rr_connectivity->on_change);
-  grpc_lb_policy_exit_idle_locked(exec_ctx, glb_policy->rr_policy);
+  grpc_lb_policy_exit_idle_locked(glb_policy->rr_policy);
 
   /* Update picks and pings in wait */
   pending_pick* pp;
@@ -814,7 +819,7 @@ static void create_rr_locked(grpc_exec_ctx* exec_ctx, glb_lb_policy* glb_policy,
               "[grpclb %p] Pending pick about to (async) PICK from RR %p",
               glb_policy, glb_policy->rr_policy);
     }
-    pick_from_internal_rr_locked(exec_ctx, glb_policy, &pp->pick_args,
+    pick_from_internal_rr_locked(glb_policy, &pp->pick_args,
                                  true /* force_async */, pp->target,
                                  &pp->wrapped_on_complete_arg);
   }
@@ -822,46 +827,53 @@ static void create_rr_locked(grpc_exec_ctx* exec_ctx, glb_lb_policy* glb_policy,
   pending_ping* pping;
   while ((pping = glb_policy->pending_pings)) {
     glb_policy->pending_pings = pping->next;
-    GRPC_LB_POLICY_REF(glb_policy->rr_policy, "rr_handover_pending_ping");
-    pping->wrapped_notify_arg.rr_policy = glb_policy->rr_policy;
+    grpc_closure* on_initiate = nullptr;
+    grpc_closure* on_ack = nullptr;
+    if (pping->on_initiate != nullptr) {
+      GRPC_LB_POLICY_REF(glb_policy->rr_policy, "rr_handover_pending_ping");
+      pping->on_initiate->rr_policy = glb_policy->rr_policy;
+      on_initiate = &pping->on_initiate->wrapper_closure;
+    }
+    if (pping->on_ack != nullptr) {
+      GRPC_LB_POLICY_REF(glb_policy->rr_policy, "rr_handover_pending_ping");
+      pping->on_ack->rr_policy = glb_policy->rr_policy;
+      on_ack = &pping->on_ack->wrapper_closure;
+    }
     if (grpc_lb_glb_trace.enabled()) {
       gpr_log(GPR_INFO, "[grpclb %p] Pending ping about to PING from RR %p",
               glb_policy, glb_policy->rr_policy);
     }
-    grpc_lb_policy_ping_one_locked(exec_ctx, glb_policy->rr_policy,
-                                   &pping->wrapped_notify_arg.wrapper_closure);
+    grpc_lb_policy_ping_one_locked(glb_policy->rr_policy, on_initiate, on_ack);
+    gpr_free(pping);
   }
 }
 
-/* glb_policy->rr_policy may be NULL (initial handover) */
-static void rr_handover_locked(grpc_exec_ctx* exec_ctx,
-                               glb_lb_policy* glb_policy) {
+/* glb_policy->rr_policy may be nullptr (initial handover) */
+static void rr_handover_locked(glb_lb_policy* glb_policy) {
   if (glb_policy->shutting_down) return;
-  grpc_lb_policy_args* args = lb_policy_args_create(exec_ctx, glb_policy);
+  grpc_lb_policy_args* args = lb_policy_args_create(glb_policy);
   GPR_ASSERT(args != nullptr);
   if (glb_policy->rr_policy != nullptr) {
     if (grpc_lb_glb_trace.enabled()) {
       gpr_log(GPR_DEBUG, "[grpclb %p] Updating RR policy %p", glb_policy,
               glb_policy->rr_policy);
     }
-    grpc_lb_policy_update_locked(exec_ctx, glb_policy->rr_policy, args);
+    grpc_lb_policy_update_locked(glb_policy->rr_policy, args);
   } else {
-    create_rr_locked(exec_ctx, glb_policy, args);
+    create_rr_locked(glb_policy, args);
     if (grpc_lb_glb_trace.enabled()) {
       gpr_log(GPR_DEBUG, "[grpclb %p] Created new RR policy %p", glb_policy,
               glb_policy->rr_policy);
     }
   }
-  lb_policy_args_destroy(exec_ctx, args);
+  lb_policy_args_destroy(args);
 }
 
-static void glb_rr_connectivity_changed_locked(grpc_exec_ctx* exec_ctx,
-                                               void* arg, grpc_error* error) {
+static void glb_rr_connectivity_changed_locked(void* arg, grpc_error* error) {
   rr_connectivity_data* rr_connectivity = (rr_connectivity_data*)arg;
   glb_lb_policy* glb_policy = rr_connectivity->glb_policy;
   if (glb_policy->shutting_down) {
-    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
-                              "glb_rr_connectivity_cb");
+    GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base, "glb_rr_connectivity_cb");
     gpr_free(rr_connectivity);
     return;
   }
@@ -869,25 +881,22 @@ static void glb_rr_connectivity_changed_locked(grpc_exec_ctx* exec_ctx,
     /* An RR policy that has transitioned into the SHUTDOWN connectivity state
      * should not be considered for picks or updates: the SHUTDOWN state is a
      * sink, policies can't transition back from it. .*/
-    GRPC_LB_POLICY_UNREF(exec_ctx, glb_policy->rr_policy,
-                         "rr_connectivity_shutdown");
+    GRPC_LB_POLICY_UNREF(glb_policy->rr_policy, "rr_connectivity_shutdown");
     glb_policy->rr_policy = nullptr;
-    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
-                              "glb_rr_connectivity_cb");
+    GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base, "glb_rr_connectivity_cb");
     gpr_free(rr_connectivity);
     return;
   }
   /* rr state != SHUTDOWN && !glb_policy->shutting down: biz as usual */
-  update_lb_connectivity_status_locked(
-      exec_ctx, glb_policy, rr_connectivity->state, GRPC_ERROR_REF(error));
+  update_lb_connectivity_status_locked(glb_policy, rr_connectivity->state,
+                                       GRPC_ERROR_REF(error));
   /* Resubscribe. Reuse the "glb_rr_connectivity_cb" weak ref. */
-  grpc_lb_policy_notify_on_state_change_locked(exec_ctx, glb_policy->rr_policy,
+  grpc_lb_policy_notify_on_state_change_locked(glb_policy->rr_policy,
                                                &rr_connectivity->state,
                                                &rr_connectivity->on_change);
 }
 
-static void destroy_balancer_name(grpc_exec_ctx* exec_ctx,
-                                  void* balancer_name) {
+static void destroy_balancer_name(void* balancer_name) {
   gpr_free(balancer_name);
 }
 
@@ -914,7 +923,7 @@ static int balancer_name_cmp_fn(void* a, void* b) {
  *   above the grpclb policy.
  *   - \a args: other args inherited from the grpclb policy. */
 static grpc_channel_args* build_lb_channel_args(
-    grpc_exec_ctx* exec_ctx, const grpc_lb_addresses* addresses,
+    const grpc_lb_addresses* addresses,
     grpc_fake_resolver_response_generator* response_generator,
     const grpc_channel_args* args) {
   size_t num_grpclb_addrs = 0;
@@ -957,7 +966,7 @@ static grpc_channel_args* build_lb_channel_args(
   gpr_free(targets_info_entries);
 
   grpc_channel_args* lb_channel_args =
-      grpc_lb_policy_grpclb_build_lb_channel_args(exec_ctx, targets_info,
+      grpc_lb_policy_grpclb_build_lb_channel_args(targets_info,
                                                   response_generator, args);
 
   grpc_arg lb_channel_addresses_arg =
@@ -965,34 +974,34 @@ static grpc_channel_args* build_lb_channel_args(
 
   grpc_channel_args* result = grpc_channel_args_copy_and_add(
       lb_channel_args, &lb_channel_addresses_arg, 1);
-  grpc_slice_hash_table_unref(exec_ctx, targets_info);
-  grpc_channel_args_destroy(exec_ctx, lb_channel_args);
-  grpc_lb_addresses_destroy(exec_ctx, lb_addresses);
+  grpc_slice_hash_table_unref(targets_info);
+  grpc_channel_args_destroy(lb_channel_args);
+  grpc_lb_addresses_destroy(lb_addresses);
   return result;
 }
 
-static void glb_destroy(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void glb_destroy(grpc_lb_policy* pol) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
   GPR_ASSERT(glb_policy->pending_picks == nullptr);
   GPR_ASSERT(glb_policy->pending_pings == nullptr);
   gpr_free((void*)glb_policy->server_name);
-  grpc_channel_args_destroy(exec_ctx, glb_policy->args);
+  grpc_channel_args_destroy(glb_policy->args);
   if (glb_policy->client_stats != nullptr) {
     grpc_grpclb_client_stats_unref(glb_policy->client_stats);
   }
-  grpc_connectivity_state_destroy(exec_ctx, &glb_policy->state_tracker);
+  grpc_connectivity_state_destroy(&glb_policy->state_tracker);
   if (glb_policy->serverlist != nullptr) {
     grpc_grpclb_destroy_serverlist(glb_policy->serverlist);
   }
   if (glb_policy->fallback_backend_addresses != nullptr) {
-    grpc_lb_addresses_destroy(exec_ctx, glb_policy->fallback_backend_addresses);
+    grpc_lb_addresses_destroy(glb_policy->fallback_backend_addresses);
   }
   grpc_fake_resolver_response_generator_unref(glb_policy->response_generator);
   grpc_subchannel_index_unref();
   gpr_free(glb_policy);
 }
 
-static void glb_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void glb_shutdown_locked(grpc_lb_policy* pol) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
   grpc_error* error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel shutdown");
   glb_policy->shutting_down = true;
@@ -1011,11 +1020,11 @@ static void glb_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
     /* lb_on_server_status_received will pick up the cancel and clean up */
   }
   if (glb_policy->retry_timer_active) {
-    grpc_timer_cancel(exec_ctx, &glb_policy->lb_call_retry_timer);
+    grpc_timer_cancel(&glb_policy->lb_call_retry_timer);
     glb_policy->retry_timer_active = false;
   }
   if (glb_policy->fallback_timer_active) {
-    grpc_timer_cancel(exec_ctx, &glb_policy->lb_fallback_timer);
+    grpc_timer_cancel(&glb_policy->lb_fallback_timer);
     glb_policy->fallback_timer_active = false;
   }
 
@@ -1024,10 +1033,9 @@ static void glb_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
   pending_ping* pping = glb_policy->pending_pings;
   glb_policy->pending_pings = nullptr;
   if (glb_policy->rr_policy != nullptr) {
-    GRPC_LB_POLICY_UNREF(exec_ctx, glb_policy->rr_policy, "glb_shutdown");
+    GRPC_LB_POLICY_UNREF(glb_policy->rr_policy, "glb_shutdown");
   } else {
-    grpc_lb_policy_try_reresolve(exec_ctx, pol, &grpc_lb_glb_trace,
-                                 GRPC_ERROR_CANCELLED);
+    grpc_lb_policy_try_reresolve(pol, &grpc_lb_glb_trace, GRPC_ERROR_CANCELLED);
   }
   // We destroy the LB channel here because
   // glb_lb_channel_on_connectivity_changed_cb needs a valid glb_policy
@@ -1037,14 +1045,13 @@ static void glb_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
     grpc_channel_destroy(glb_policy->lb_channel);
     glb_policy->lb_channel = nullptr;
   }
-  grpc_connectivity_state_set(exec_ctx, &glb_policy->state_tracker,
-                              GRPC_CHANNEL_SHUTDOWN, GRPC_ERROR_REF(error),
-                              "glb_shutdown");
+  grpc_connectivity_state_set(&glb_policy->state_tracker, GRPC_CHANNEL_SHUTDOWN,
+                              GRPC_ERROR_REF(error), "glb_shutdown");
 
   while (pp != nullptr) {
     pending_pick* next = pp->next;
     *pp->target = nullptr;
-    GRPC_CLOSURE_SCHED(exec_ctx, &pp->wrapped_on_complete_arg.wrapper_closure,
+    GRPC_CLOSURE_SCHED(&pp->wrapped_on_complete_arg.wrapper_closure,
                        GRPC_ERROR_REF(error));
     gpr_free(pp);
     pp = next;
@@ -1052,8 +1059,16 @@ static void glb_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
 
   while (pping != nullptr) {
     pending_ping* next = pping->next;
-    GRPC_CLOSURE_SCHED(exec_ctx, &pping->wrapped_notify_arg.wrapper_closure,
-                       GRPC_ERROR_REF(error));
+    if (pping->on_initiate != nullptr) {
+      GRPC_CLOSURE_SCHED(&pping->on_initiate->wrapper_closure,
+                         GRPC_ERROR_REF(error));
+      gpr_free(pping->on_initiate);
+    }
+    if (pping->on_ack != nullptr) {
+      GRPC_CLOSURE_SCHED(&pping->on_ack->wrapper_closure,
+                         GRPC_ERROR_REF(error));
+      gpr_free(pping->on_ack);
+    }
     gpr_free(pping);
     pping = next;
   }
@@ -1069,8 +1084,8 @@ static void glb_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
 //   pick needs also be cancelled by the RR instance.
 // - Otherwise, without an RR instance, picks stay pending at this policy's
 //   level (grpclb), inside the glb_policy->pending_picks list. To cancel these,
-//   we invoke the completion closure and set *target to NULL right here.
-static void glb_cancel_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+//   we invoke the completion closure and set *target to nullptr right here.
+static void glb_cancel_pick_locked(grpc_lb_policy* pol,
                                    grpc_connected_subchannel** target,
                                    grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
@@ -1080,7 +1095,7 @@ static void glb_cancel_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
     pending_pick* next = pp->next;
     if (pp->target == target) {
       *target = nullptr;
-      GRPC_CLOSURE_SCHED(exec_ctx, &pp->wrapped_on_complete_arg.wrapper_closure,
+      GRPC_CLOSURE_SCHED(&pp->wrapped_on_complete_arg.wrapper_closure,
                          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Pick Cancelled", &error, 1));
     } else {
@@ -1090,7 +1105,7 @@ static void glb_cancel_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
     pp = next;
   }
   if (glb_policy->rr_policy != nullptr) {
-    grpc_lb_policy_cancel_pick_locked(exec_ctx, glb_policy->rr_policy, target,
+    grpc_lb_policy_cancel_pick_locked(glb_policy->rr_policy, target,
                                       GRPC_ERROR_REF(error));
   }
   GRPC_ERROR_UNREF(error);
@@ -1105,9 +1120,8 @@ static void glb_cancel_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
 //   pick needs also be cancelled by the RR instance.
 // - Otherwise, without an RR instance, picks stay pending at this policy's
 //   level (grpclb), inside the glb_policy->pending_picks list. To cancel these,
-//   we invoke the completion closure and set *target to NULL right here.
-static void glb_cancel_picks_locked(grpc_exec_ctx* exec_ctx,
-                                    grpc_lb_policy* pol,
+//   we invoke the completion closure and set *target to nullptr right here.
+static void glb_cancel_picks_locked(grpc_lb_policy* pol,
                                     uint32_t initial_metadata_flags_mask,
                                     uint32_t initial_metadata_flags_eq,
                                     grpc_error* error) {
@@ -1118,7 +1132,7 @@ static void glb_cancel_picks_locked(grpc_exec_ctx* exec_ctx,
     pending_pick* next = pp->next;
     if ((pp->pick_args.initial_metadata_flags & initial_metadata_flags_mask) ==
         initial_metadata_flags_eq) {
-      GRPC_CLOSURE_SCHED(exec_ctx, &pp->wrapped_on_complete_arg.wrapper_closure,
+      GRPC_CLOSURE_SCHED(&pp->wrapped_on_complete_arg.wrapper_closure,
                          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Pick Cancelled", &error, 1));
     } else {
@@ -1129,52 +1143,49 @@ static void glb_cancel_picks_locked(grpc_exec_ctx* exec_ctx,
   }
   if (glb_policy->rr_policy != nullptr) {
     grpc_lb_policy_cancel_picks_locked(
-        exec_ctx, glb_policy->rr_policy, initial_metadata_flags_mask,
+        glb_policy->rr_policy, initial_metadata_flags_mask,
         initial_metadata_flags_eq, GRPC_ERROR_REF(error));
   }
   GRPC_ERROR_UNREF(error);
 }
 
-static void lb_on_fallback_timer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error);
-static void query_for_backends_locked(grpc_exec_ctx* exec_ctx,
-                                      glb_lb_policy* glb_policy);
-static void start_picking_locked(grpc_exec_ctx* exec_ctx,
-                                 glb_lb_policy* glb_policy) {
+static void lb_on_fallback_timer_locked(void* arg, grpc_error* error);
+static void query_for_backends_locked(glb_lb_policy* glb_policy);
+static void start_picking_locked(glb_lb_policy* glb_policy) {
   /* start a timer to fall back */
   if (glb_policy->lb_fallback_timeout_ms > 0 &&
       glb_policy->serverlist == nullptr && !glb_policy->fallback_timer_active) {
     grpc_millis deadline =
-        grpc_exec_ctx_now(exec_ctx) + glb_policy->lb_fallback_timeout_ms;
+        grpc_core::ExecCtx::Get()->Now() + glb_policy->lb_fallback_timeout_ms;
     GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "grpclb_fallback_timer");
     GRPC_CLOSURE_INIT(&glb_policy->lb_on_fallback, lb_on_fallback_timer_locked,
                       glb_policy,
                       grpc_combiner_scheduler(glb_policy->base.combiner));
     glb_policy->fallback_timer_active = true;
-    grpc_timer_init(exec_ctx, &glb_policy->lb_fallback_timer, deadline,
+    grpc_timer_init(&glb_policy->lb_fallback_timer, deadline,
                     &glb_policy->lb_on_fallback);
   }
 
   glb_policy->started_picking = true;
   glb_policy->lb_call_backoff->Reset();
-  query_for_backends_locked(exec_ctx, glb_policy);
+  query_for_backends_locked(glb_policy);
 }
 
-static void glb_exit_idle_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void glb_exit_idle_locked(grpc_lb_policy* pol) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
   if (!glb_policy->started_picking) {
-    start_picking_locked(exec_ctx, glb_policy);
+    start_picking_locked(glb_policy);
   }
 }
 
-static int glb_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static int glb_pick_locked(grpc_lb_policy* pol,
                            const grpc_lb_policy_pick_args* pick_args,
                            grpc_connected_subchannel** target,
                            grpc_call_context_element* context, void** user_data,
                            grpc_closure* on_complete) {
   if (pick_args->lb_token_mdelem_storage == nullptr) {
     *target = nullptr;
-    GRPC_CLOSURE_SCHED(exec_ctx, on_complete,
+    GRPC_CLOSURE_SCHED(on_complete,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                            "No mdelem storage for the LB token. Load reporting "
                            "won't work without it. Failing"));
@@ -1184,8 +1195,8 @@ static int glb_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
   bool pick_done = false;
   if (glb_policy->rr_policy != nullptr) {
     const grpc_connectivity_state rr_connectivity_state =
-        grpc_lb_policy_check_connectivity_locked(
-            exec_ctx, glb_policy->rr_policy, nullptr);
+        grpc_lb_policy_check_connectivity_locked(glb_policy->rr_policy,
+                                                 nullptr);
     // The glb_policy->rr_policy may have transitioned to SHUTDOWN but the
     // callback registered to capture this event
     // (glb_rr_connectivity_changed_locked) may not have been invoked yet. We
@@ -1222,9 +1233,8 @@ static int glb_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
       wc_arg->initial_metadata = pick_args->initial_metadata;
       wc_arg->free_when_done = wc_arg;
       wc_arg->glb_policy = pol;
-      pick_done =
-          pick_from_internal_rr_locked(exec_ctx, glb_policy, pick_args,
-                                       false /* force_async */, target, wc_arg);
+      pick_done = pick_from_internal_rr_locked(
+          glb_policy, pick_args, false /* force_async */, target, wc_arg);
     }
   } else {  // glb_policy->rr_policy == NULL
     if (grpc_lb_glb_trace.enabled()) {
@@ -1235,7 +1245,7 @@ static int glb_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
     add_pending_pick(&glb_policy->pending_picks, pick_args, target, context,
                      on_complete);
     if (!glb_policy->started_picking) {
-      start_picking_locked(exec_ctx, glb_policy);
+      start_picking_locked(glb_policy);
     }
     pick_done = false;
   }
@@ -1243,37 +1253,34 @@ static int glb_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
 }
 
 static grpc_connectivity_state glb_check_connectivity_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
-    grpc_error** connectivity_error) {
+    grpc_lb_policy* pol, grpc_error** connectivity_error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
   return grpc_connectivity_state_get(&glb_policy->state_tracker,
                                      connectivity_error);
 }
 
-static void glb_ping_one_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
-                                grpc_closure* closure) {
+static void glb_ping_one_locked(grpc_lb_policy* pol, grpc_closure* on_initiate,
+                                grpc_closure* on_ack) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
   if (glb_policy->rr_policy) {
-    grpc_lb_policy_ping_one_locked(exec_ctx, glb_policy->rr_policy, closure);
+    grpc_lb_policy_ping_one_locked(glb_policy->rr_policy, on_initiate, on_ack);
   } else {
-    add_pending_ping(&glb_policy->pending_pings, closure);
+    add_pending_ping(&glb_policy->pending_pings, on_initiate, on_ack);
     if (!glb_policy->started_picking) {
-      start_picking_locked(exec_ctx, glb_policy);
+      start_picking_locked(glb_policy);
     }
   }
 }
 
-static void glb_notify_on_state_change_locked(grpc_exec_ctx* exec_ctx,
-                                              grpc_lb_policy* pol,
+static void glb_notify_on_state_change_locked(grpc_lb_policy* pol,
                                               grpc_connectivity_state* current,
                                               grpc_closure* notify) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
-  grpc_connectivity_state_notify_on_state_change(
-      exec_ctx, &glb_policy->state_tracker, current, notify);
+  grpc_connectivity_state_notify_on_state_change(&glb_policy->state_tracker,
+                                                 current, notify);
 }
 
-static void lb_call_on_retry_timer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                          grpc_error* error) {
+static void lb_call_on_retry_timer_locked(void* arg, grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   glb_policy->retry_timer_active = false;
   if (!glb_policy->shutting_down && glb_policy->lb_call == nullptr &&
@@ -1281,26 +1288,25 @@ static void lb_call_on_retry_timer_locked(grpc_exec_ctx* exec_ctx, void* arg,
     if (grpc_lb_glb_trace.enabled()) {
       gpr_log(GPR_INFO, "[grpclb %p] Restarting call to LB server", glb_policy);
     }
-    query_for_backends_locked(exec_ctx, glb_policy);
+    query_for_backends_locked(glb_policy);
   }
-  GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base, "grpclb_retry_timer");
+  GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base, "grpclb_retry_timer");
 }
 
-static void maybe_restart_lb_call(grpc_exec_ctx* exec_ctx,
-                                  glb_lb_policy* glb_policy) {
+static void maybe_restart_lb_call(glb_lb_policy* glb_policy) {
   if (glb_policy->started_picking && glb_policy->updating_lb_call) {
     if (glb_policy->retry_timer_active) {
-      grpc_timer_cancel(exec_ctx, &glb_policy->lb_call_retry_timer);
+      grpc_timer_cancel(&glb_policy->lb_call_retry_timer);
     }
-    if (!glb_policy->shutting_down) start_picking_locked(exec_ctx, glb_policy);
+    if (!glb_policy->shutting_down) start_picking_locked(glb_policy);
     glb_policy->updating_lb_call = false;
   } else if (!glb_policy->shutting_down) {
     /* if we aren't shutting down, restart the LB client call after some time */
-    grpc_millis next_try = glb_policy->lb_call_backoff->Step(exec_ctx);
+    grpc_millis next_try = glb_policy->lb_call_backoff->Step();
     if (grpc_lb_glb_trace.enabled()) {
       gpr_log(GPR_DEBUG, "[grpclb %p] Connection to LB server lost...",
               glb_policy);
-      grpc_millis timeout = next_try - grpc_exec_ctx_now(exec_ctx);
+      grpc_millis timeout = next_try - grpc_core::ExecCtx::Get()->Now();
       if (timeout > 0) {
         gpr_log(GPR_DEBUG,
                 "[grpclb %p] ... retry_timer_active in %" PRIuPTR "ms.",
@@ -1315,43 +1321,40 @@ static void maybe_restart_lb_call(grpc_exec_ctx* exec_ctx,
                       lb_call_on_retry_timer_locked, glb_policy,
                       grpc_combiner_scheduler(glb_policy->base.combiner));
     glb_policy->retry_timer_active = true;
-    grpc_timer_init(exec_ctx, &glb_policy->lb_call_retry_timer, next_try,
+    grpc_timer_init(&glb_policy->lb_call_retry_timer, next_try,
                     &glb_policy->lb_on_call_retry);
   }
-  GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
+  GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base,
                             "lb_on_server_status_received_locked");
 }
 
-static void send_client_load_report_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error);
+static void send_client_load_report_locked(void* arg, grpc_error* error);
 
-static void schedule_next_client_load_report(grpc_exec_ctx* exec_ctx,
-                                             glb_lb_policy* glb_policy) {
+static void schedule_next_client_load_report(glb_lb_policy* glb_policy) {
   const grpc_millis next_client_load_report_time =
-      grpc_exec_ctx_now(exec_ctx) + glb_policy->client_stats_report_interval;
+      grpc_core::ExecCtx::Get()->Now() +
+      glb_policy->client_stats_report_interval;
   GRPC_CLOSURE_INIT(&glb_policy->client_load_report_closure,
                     send_client_load_report_locked, glb_policy,
                     grpc_combiner_scheduler(glb_policy->base.combiner));
-  grpc_timer_init(exec_ctx, &glb_policy->client_load_report_timer,
+  grpc_timer_init(&glb_policy->client_load_report_timer,
                   next_client_load_report_time,
                   &glb_policy->client_load_report_closure);
 }
 
-static void client_load_report_done_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void client_load_report_done_locked(void* arg, grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   grpc_byte_buffer_destroy(glb_policy->client_load_report_payload);
   glb_policy->client_load_report_payload = nullptr;
   if (error != GRPC_ERROR_NONE || glb_policy->lb_call == nullptr) {
     glb_policy->client_load_report_timer_pending = false;
-    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
-                              "client_load_report");
+    GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base, "client_load_report");
     if (glb_policy->lb_call == nullptr) {
-      maybe_restart_lb_call(exec_ctx, glb_policy);
+      maybe_restart_lb_call(glb_policy);
     }
     return;
   }
-  schedule_next_client_load_report(exec_ctx, glb_policy);
+  schedule_next_client_load_report(glb_policy);
 }
 
 static bool load_report_counters_are_zero(grpc_grpclb_request* request) {
@@ -1366,15 +1369,13 @@ static bool load_report_counters_are_zero(grpc_grpclb_request* request) {
          (drop_entries == nullptr || drop_entries->num_entries == 0);
 }
 
-static void send_client_load_report_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void send_client_load_report_locked(void* arg, grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   if (error == GRPC_ERROR_CANCELLED || glb_policy->lb_call == nullptr) {
     glb_policy->client_load_report_timer_pending = false;
-    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
-                              "client_load_report");
+    GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base, "client_load_report");
     if (glb_policy->lb_call == nullptr) {
-      maybe_restart_lb_call(exec_ctx, glb_policy);
+      maybe_restart_lb_call(glb_policy);
     }
     return;
   }
@@ -1387,7 +1388,7 @@ static void send_client_load_report_locked(grpc_exec_ctx* exec_ctx, void* arg,
   if (load_report_counters_are_zero(request)) {
     if (glb_policy->last_client_load_report_counters_were_zero) {
       grpc_grpclb_request_destroy(request);
-      schedule_next_client_load_report(exec_ctx, glb_policy);
+      schedule_next_client_load_report(glb_policy);
       return;
     }
     glb_policy->last_client_load_report_counters_were_zero = true;
@@ -1397,7 +1398,7 @@ static void send_client_load_report_locked(grpc_exec_ctx* exec_ctx, void* arg,
   grpc_slice request_payload_slice = grpc_grpclb_request_encode(request);
   glb_policy->client_load_report_payload =
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
-  grpc_slice_unref_internal(exec_ctx, request_payload_slice);
+  grpc_slice_unref_internal(request_payload_slice);
   grpc_grpclb_request_destroy(request);
   // Send load report message.
   grpc_op op;
@@ -1408,20 +1409,16 @@ static void send_client_load_report_locked(grpc_exec_ctx* exec_ctx, void* arg,
                     client_load_report_done_locked, glb_policy,
                     grpc_combiner_scheduler(glb_policy->base.combiner));
   grpc_call_error call_error = grpc_call_start_batch_and_execute(
-      exec_ctx, glb_policy->lb_call, &op, 1,
-      &glb_policy->client_load_report_closure);
+      glb_policy->lb_call, &op, 1, &glb_policy->client_load_report_closure);
   if (call_error != GRPC_CALL_OK) {
     gpr_log(GPR_ERROR, "[grpclb %p] call_error=%d", glb_policy, call_error);
     GPR_ASSERT(GRPC_CALL_OK == call_error);
   }
 }
 
-static void lb_on_server_status_received_locked(grpc_exec_ctx* exec_ctx,
-                                                void* arg, grpc_error* error);
-static void lb_on_response_received_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error);
-static void lb_call_init_locked(grpc_exec_ctx* exec_ctx,
-                                glb_lb_policy* glb_policy) {
+static void lb_on_server_status_received_locked(void* arg, grpc_error* error);
+static void lb_on_response_received_locked(void* arg, grpc_error* error);
+static void lb_call_init_locked(glb_lb_policy* glb_policy) {
   GPR_ASSERT(glb_policy->server_name != nullptr);
   GPR_ASSERT(glb_policy->server_name[0] != '\0');
   GPR_ASSERT(glb_policy->lb_call == nullptr);
@@ -1434,13 +1431,13 @@ static void lb_call_init_locked(grpc_exec_ctx* exec_ctx,
   grpc_millis deadline =
       glb_policy->lb_call_timeout_ms == 0
           ? GRPC_MILLIS_INF_FUTURE
-          : grpc_exec_ctx_now(exec_ctx) + glb_policy->lb_call_timeout_ms;
+          : grpc_core::ExecCtx::Get()->Now() + glb_policy->lb_call_timeout_ms;
   glb_policy->lb_call = grpc_channel_create_pollset_set_call(
-      exec_ctx, glb_policy->lb_channel, nullptr, GRPC_PROPAGATE_DEFAULTS,
+      glb_policy->lb_channel, nullptr, GRPC_PROPAGATE_DEFAULTS,
       glb_policy->base.interested_parties,
       GRPC_MDSTR_SLASH_GRPC_DOT_LB_DOT_V1_DOT_LOADBALANCER_SLASH_BALANCELOAD,
       &host, deadline, nullptr);
-  grpc_slice_unref_internal(exec_ctx, host);
+  grpc_slice_unref_internal(host);
 
   if (glb_policy->client_stats != nullptr) {
     grpc_grpclb_client_stats_unref(glb_policy->client_stats);
@@ -1455,7 +1452,7 @@ static void lb_call_init_locked(grpc_exec_ctx* exec_ctx,
   grpc_slice request_payload_slice = grpc_grpclb_request_encode(request);
   glb_policy->lb_request_payload =
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
-  grpc_slice_unref_internal(exec_ctx, request_payload_slice);
+  grpc_slice_unref_internal(request_payload_slice);
   grpc_grpclb_request_destroy(request);
 
   GRPC_CLOSURE_INIT(&glb_policy->lb_on_server_status_received,
@@ -1478,8 +1475,7 @@ static void lb_call_init_locked(grpc_exec_ctx* exec_ctx,
   glb_policy->last_client_load_report_counters_were_zero = false;
 }
 
-static void lb_call_destroy_locked(grpc_exec_ctx* exec_ctx,
-                                   glb_lb_policy* glb_policy) {
+static void lb_call_destroy_locked(glb_lb_policy* glb_policy) {
   GPR_ASSERT(glb_policy->lb_call != nullptr);
   grpc_call_unref(glb_policy->lb_call);
   glb_policy->lb_call = nullptr;
@@ -1488,22 +1484,21 @@ static void lb_call_destroy_locked(grpc_exec_ctx* exec_ctx,
   grpc_metadata_array_destroy(&glb_policy->lb_trailing_metadata_recv);
 
   grpc_byte_buffer_destroy(glb_policy->lb_request_payload);
-  grpc_slice_unref_internal(exec_ctx, glb_policy->lb_call_status_details);
+  grpc_slice_unref_internal(glb_policy->lb_call_status_details);
 
   if (glb_policy->client_load_report_timer_pending) {
-    grpc_timer_cancel(exec_ctx, &glb_policy->client_load_report_timer);
+    grpc_timer_cancel(&glb_policy->client_load_report_timer);
   }
 }
 
 /*
  * Auxiliary functions and LB client callbacks.
  */
-static void query_for_backends_locked(grpc_exec_ctx* exec_ctx,
-                                      glb_lb_policy* glb_policy) {
+static void query_for_backends_locked(glb_lb_policy* glb_policy) {
   GPR_ASSERT(glb_policy->lb_channel != nullptr);
   if (glb_policy->shutting_down) return;
 
-  lb_call_init_locked(exec_ctx, glb_policy);
+  lb_call_init_locked(glb_policy);
 
   if (grpc_lb_glb_trace.enabled()) {
     gpr_log(GPR_INFO,
@@ -1534,8 +1529,8 @@ static void query_for_backends_locked(grpc_exec_ctx* exec_ctx,
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  call_error = grpc_call_start_batch_and_execute(
-      exec_ctx, glb_policy->lb_call, ops, (size_t)(op - ops), nullptr);
+  call_error = grpc_call_start_batch_and_execute(glb_policy->lb_call, ops,
+                                                 (size_t)(op - ops), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == call_error);
 
   op = ops;
@@ -1553,7 +1548,7 @@ static void query_for_backends_locked(grpc_exec_ctx* exec_ctx,
   GRPC_LB_POLICY_WEAK_REF(&glb_policy->base,
                           "lb_on_server_status_received_locked");
   call_error = grpc_call_start_batch_and_execute(
-      exec_ctx, glb_policy->lb_call, ops, (size_t)(op - ops),
+      glb_policy->lb_call, ops, (size_t)(op - ops),
       &glb_policy->lb_on_server_status_received);
   GPR_ASSERT(GRPC_CALL_OK == call_error);
 
@@ -1567,13 +1562,12 @@ static void query_for_backends_locked(grpc_exec_ctx* exec_ctx,
    * lb_on_response_received_locked */
   GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "lb_on_response_received_locked");
   call_error = grpc_call_start_batch_and_execute(
-      exec_ctx, glb_policy->lb_call, ops, (size_t)(op - ops),
+      glb_policy->lb_call, ops, (size_t)(op - ops),
       &glb_policy->lb_on_response_received);
   GPR_ASSERT(GRPC_CALL_OK == call_error);
 }
 
-static void lb_on_response_received_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void lb_on_response_received_locked(void* arg, grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   grpc_op ops[2];
   memset(ops, 0, sizeof(ops));
@@ -1607,7 +1601,7 @@ static void lb_on_response_received_locked(grpc_exec_ctx* exec_ctx, void* arg,
          * send_client_load_report_locked() */
         glb_policy->client_load_report_timer_pending = true;
         GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "client_load_report");
-        schedule_next_client_load_report(exec_ctx, glb_policy);
+        schedule_next_client_load_report(glb_policy);
       } else if (grpc_lb_glb_trace.enabled()) {
         gpr_log(GPR_INFO,
                 "[grpclb %p] Received initial LB response message; client load "
@@ -1652,11 +1646,10 @@ static void lb_on_response_received_locked(grpc_exec_ctx* exec_ctx, void* arg,
               grpc_grpclb_destroy_serverlist(glb_policy->serverlist);
             } else {
               /* or dispose of the fallback */
-              grpc_lb_addresses_destroy(exec_ctx,
-                                        glb_policy->fallback_backend_addresses);
+              grpc_lb_addresses_destroy(glb_policy->fallback_backend_addresses);
               glb_policy->fallback_backend_addresses = nullptr;
               if (glb_policy->fallback_timer_active) {
-                grpc_timer_cancel(exec_ctx, &glb_policy->lb_fallback_timer);
+                grpc_timer_cancel(&glb_policy->lb_fallback_timer);
                 glb_policy->fallback_timer_active = false;
               }
             }
@@ -1665,7 +1658,7 @@ static void lb_on_response_received_locked(grpc_exec_ctx* exec_ctx, void* arg,
              * update or in glb_destroy() */
             glb_policy->serverlist = serverlist;
             glb_policy->serverlist_index = 0;
-            rr_handover_locked(exec_ctx, glb_policy);
+            rr_handover_locked(glb_policy);
           }
         } else {
           if (grpc_lb_glb_trace.enabled()) {
@@ -1675,14 +1668,14 @@ static void lb_on_response_received_locked(grpc_exec_ctx* exec_ctx, void* arg,
           }
           grpc_grpclb_destroy_serverlist(serverlist);
         }
-      } else { /* serverlist == NULL */
+      } else { /* serverlist == nullptr */
         gpr_log(GPR_ERROR,
                 "[grpclb %p] Invalid LB response received: '%s'. Ignoring.",
                 glb_policy,
                 grpc_dump_slice(response_slice, GPR_DUMP_ASCII | GPR_DUMP_HEX));
       }
     }
-    grpc_slice_unref_internal(exec_ctx, response_slice);
+    grpc_slice_unref_internal(response_slice);
     if (!glb_policy->shutting_down) {
       /* keep listening for serverlist updates */
       op->op = GRPC_OP_RECV_MESSAGE;
@@ -1693,23 +1686,22 @@ static void lb_on_response_received_locked(grpc_exec_ctx* exec_ctx, void* arg,
       /* reuse the "lb_on_response_received_locked" weak ref taken in
        * query_for_backends_locked() */
       const grpc_call_error call_error = grpc_call_start_batch_and_execute(
-          exec_ctx, glb_policy->lb_call, ops, (size_t)(op - ops),
+          glb_policy->lb_call, ops, (size_t)(op - ops),
           &glb_policy->lb_on_response_received); /* loop */
       GPR_ASSERT(GRPC_CALL_OK == call_error);
     } else {
-      GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
+      GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base,
                                 "lb_on_response_received_locked_shutdown");
     }
   } else { /* empty payload: call cancelled. */
            /* dispose of the "lb_on_response_received_locked" weak ref taken in
             * query_for_backends_locked() and reused in every reception loop */
-    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
+    GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base,
                               "lb_on_response_received_locked_empty_payload");
   }
 }
 
-static void lb_on_fallback_timer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void lb_on_fallback_timer_locked(void* arg, grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   glb_policy->fallback_timer_active = false;
   /* If we receive a serverlist after the timer fires but before this callback
@@ -1722,15 +1714,13 @@ static void lb_on_fallback_timer_locked(grpc_exec_ctx* exec_ctx, void* arg,
                 glb_policy);
       }
       GPR_ASSERT(glb_policy->fallback_backend_addresses != nullptr);
-      rr_handover_locked(exec_ctx, glb_policy);
+      rr_handover_locked(glb_policy);
     }
   }
-  GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
-                            "grpclb_fallback_timer");
+  GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base, "grpclb_fallback_timer");
 }
 
-static void lb_on_server_status_received_locked(grpc_exec_ctx* exec_ctx,
-                                                void* arg, grpc_error* error) {
+static void lb_on_server_status_received_locked(void* arg, grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   GPR_ASSERT(glb_policy->lb_call != nullptr);
   if (grpc_lb_glb_trace.enabled()) {
@@ -1744,29 +1734,28 @@ static void lb_on_server_status_received_locked(grpc_exec_ctx* exec_ctx,
     gpr_free(status_details);
   }
   /* We need to perform cleanups no matter what. */
-  lb_call_destroy_locked(exec_ctx, glb_policy);
+  lb_call_destroy_locked(glb_policy);
   // If the load report timer is still pending, we wait for it to be
   // called before restarting the call.  Otherwise, we restart the call
   // here.
   if (!glb_policy->client_load_report_timer_pending) {
-    maybe_restart_lb_call(exec_ctx, glb_policy);
+    maybe_restart_lb_call(glb_policy);
   }
 }
 
-static void fallback_update_locked(grpc_exec_ctx* exec_ctx,
-                                   glb_lb_policy* glb_policy,
+static void fallback_update_locked(glb_lb_policy* glb_policy,
                                    const grpc_lb_addresses* addresses) {
   GPR_ASSERT(glb_policy->fallback_backend_addresses != nullptr);
-  grpc_lb_addresses_destroy(exec_ctx, glb_policy->fallback_backend_addresses);
+  grpc_lb_addresses_destroy(glb_policy->fallback_backend_addresses);
   glb_policy->fallback_backend_addresses =
-      extract_backend_addresses_locked(exec_ctx, addresses);
+      extract_backend_addresses_locked(addresses);
   if (glb_policy->lb_fallback_timeout_ms > 0 &&
       glb_policy->rr_policy != nullptr) {
-    rr_handover_locked(exec_ctx, glb_policy);
+    rr_handover_locked(glb_policy);
   }
 }
 
-static void glb_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+static void glb_update_locked(grpc_lb_policy* policy,
                               const grpc_lb_policy_args* args) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)policy;
   const grpc_arg* arg =
@@ -1776,7 +1765,7 @@ static void glb_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
       // If we don't have a current channel to the LB, go into TRANSIENT
       // FAILURE.
       grpc_connectivity_state_set(
-          exec_ctx, &glb_policy->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+          &glb_policy->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Missing update in args"),
           "glb_update_missing");
     } else {
@@ -1793,16 +1782,16 @@ static void glb_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
   // If a non-empty serverlist hasn't been received from the balancer,
   // propagate the update to fallback_backend_addresses.
   if (glb_policy->serverlist == nullptr) {
-    fallback_update_locked(exec_ctx, glb_policy, addresses);
+    fallback_update_locked(glb_policy, addresses);
   }
   GPR_ASSERT(glb_policy->lb_channel != nullptr);
   // Propagate updates to the LB channel (pick_first) through the fake
   // resolver.
   grpc_channel_args* lb_channel_args = build_lb_channel_args(
-      exec_ctx, addresses, glb_policy->response_generator, args->args);
+      addresses, glb_policy->response_generator, args->args);
   grpc_fake_resolver_response_generator_set_response(
-      exec_ctx, glb_policy->response_generator, lb_channel_args);
-  grpc_channel_args_destroy(exec_ctx, lb_channel_args);
+      glb_policy->response_generator, lb_channel_args);
+  grpc_channel_args_destroy(lb_channel_args);
   // Start watching the LB channel connectivity for connection, if not
   // already doing so.
   if (!glb_policy->watching_lb_channel) {
@@ -1814,7 +1803,7 @@ static void glb_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
     glb_policy->watching_lb_channel = true;
     GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "watch_lb_channel_connectivity");
     grpc_client_channel_watch_connectivity_state(
-        exec_ctx, client_channel_elem,
+        client_channel_elem,
         grpc_polling_entity_create_from_pollset_set(
             glb_policy->base.interested_parties),
         &glb_policy->lb_channel_connectivity,
@@ -1825,8 +1814,7 @@ static void glb_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
 // Invoked as part of the update process. It continues watching the LB channel
 // until it shuts down or becomes READY. It's invoked even if the LB channel
 // stayed READY throughout the update (for example if the update is identical).
-static void glb_lb_channel_on_connectivity_changed_cb(grpc_exec_ctx* exec_ctx,
-                                                      void* arg,
+static void glb_lb_channel_on_connectivity_changed_cb(void* arg,
                                                       grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   if (glb_policy->shutting_down) goto done;
@@ -1842,7 +1830,7 @@ static void glb_lb_channel_on_connectivity_changed_cb(grpc_exec_ctx* exec_ctx,
               grpc_channel_get_channel_stack(glb_policy->lb_channel));
       GPR_ASSERT(client_channel_elem->filter == &grpc_client_channel_filter);
       grpc_client_channel_watch_connectivity_state(
-          exec_ctx, client_channel_elem,
+          client_channel_elem,
           grpc_polling_entity_create_from_pollset_set(
               glb_policy->base.interested_parties),
           &glb_policy->lb_channel_connectivity,
@@ -1861,29 +1849,28 @@ static void glb_lb_channel_on_connectivity_changed_cb(grpc_exec_ctx* exec_ctx,
         // lb_call.
       } else if (glb_policy->started_picking) {
         if (glb_policy->retry_timer_active) {
-          grpc_timer_cancel(exec_ctx, &glb_policy->lb_call_retry_timer);
+          grpc_timer_cancel(&glb_policy->lb_call_retry_timer);
           glb_policy->retry_timer_active = false;
         }
-        start_picking_locked(exec_ctx, glb_policy);
+        start_picking_locked(glb_policy);
       }
     /* fallthrough */
     case GRPC_CHANNEL_SHUTDOWN:
     done:
       glb_policy->watching_lb_channel = false;
-      GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
+      GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base,
                                 "watch_lb_channel_connectivity_cb_shutdown");
       break;
   }
 }
 
 static void glb_set_reresolve_closure_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-    grpc_closure* request_reresolution) {
+    grpc_lb_policy* policy, grpc_closure* request_reresolution) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)policy;
   GPR_ASSERT(!glb_policy->shutting_down);
   GPR_ASSERT(glb_policy->base.request_reresolution == nullptr);
   if (glb_policy->rr_policy != nullptr) {
-    grpc_lb_policy_set_reresolve_closure_locked(exec_ctx, glb_policy->rr_policy,
+    grpc_lb_policy_set_reresolve_closure_locked(glb_policy->rr_policy,
                                                 request_reresolution);
   } else {
     glb_policy->base.request_reresolution = request_reresolution;
@@ -1904,8 +1891,7 @@ static const grpc_lb_policy_vtable glb_lb_policy_vtable = {
     glb_update_locked,
     glb_set_reresolve_closure_locked};
 
-static grpc_lb_policy* glb_create(grpc_exec_ctx* exec_ctx,
-                                  grpc_lb_policy_factory* factory,
+static grpc_lb_policy* glb_create(grpc_lb_policy_factory* factory,
                                   grpc_lb_policy_args* args) {
   /* Count the number of gRPC-LB addresses. There must be at least one. */
   const grpc_arg* arg =
@@ -1926,7 +1912,7 @@ static grpc_lb_policy* glb_create(grpc_exec_ctx* exec_ctx,
   arg = grpc_channel_args_find(args->args, GRPC_ARG_SERVER_URI);
   GPR_ASSERT(arg != nullptr);
   GPR_ASSERT(arg->type == GRPC_ARG_STRING);
-  grpc_uri* uri = grpc_uri_parse(exec_ctx, arg->value.string, true);
+  grpc_uri* uri = grpc_uri_parse(arg->value.string, true);
   GPR_ASSERT(uri->path[0] != '\0');
   glb_policy->server_name =
       gpr_strdup(uri->path[0] == '/' ? uri->path + 1 : uri->path);
@@ -1959,26 +1945,26 @@ static grpc_lb_policy* glb_create(grpc_exec_ctx* exec_ctx,
   /* Extract the backend addresses (may be empty) from the resolver for
    * fallback. */
   glb_policy->fallback_backend_addresses =
-      extract_backend_addresses_locked(exec_ctx, addresses);
+      extract_backend_addresses_locked(addresses);
 
   /* Create a client channel over them to communicate with a LB service */
   glb_policy->response_generator =
       grpc_fake_resolver_response_generator_create();
   grpc_channel_args* lb_channel_args = build_lb_channel_args(
-      exec_ctx, addresses, glb_policy->response_generator, args->args);
+      addresses, glb_policy->response_generator, args->args);
   char* uri_str;
   gpr_asprintf(&uri_str, "fake:///%s", glb_policy->server_name);
   glb_policy->lb_channel = grpc_lb_policy_grpclb_create_lb_channel(
-      exec_ctx, uri_str, args->client_channel_factory, lb_channel_args);
+      uri_str, args->client_channel_factory, lb_channel_args);
 
   /* Propagate initial resolution */
   grpc_fake_resolver_response_generator_set_response(
-      exec_ctx, glb_policy->response_generator, lb_channel_args);
-  grpc_channel_args_destroy(exec_ctx, lb_channel_args);
+      glb_policy->response_generator, lb_channel_args);
+  grpc_channel_args_destroy(lb_channel_args);
   gpr_free(uri_str);
   if (glb_policy->lb_channel == nullptr) {
     gpr_free((void*)glb_policy->server_name);
-    grpc_channel_args_destroy(exec_ctx, glb_policy->args);
+    grpc_channel_args_destroy(glb_policy->args);
     gpr_free(glb_policy);
     return nullptr;
   }
@@ -2009,7 +1995,7 @@ grpc_lb_policy_factory* grpc_glb_lb_factory_create() {
 
 // Only add client_load_reporting filter if the grpclb LB policy is used.
 static bool maybe_add_client_load_reporting_filter(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, void* arg) {
+    grpc_channel_stack_builder* builder, void* arg) {
   const grpc_channel_args* args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
   const grpc_arg* channel_arg =
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.cc
index aacaec197d..a8ecea4212 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.cc
@@ -26,17 +26,17 @@
 #include "src/core/lib/support/string.h"
 
 grpc_channel* grpc_lb_policy_grpclb_create_lb_channel(
-    grpc_exec_ctx* exec_ctx, const char* lb_service_target_addresses,
+    const char* lb_service_target_addresses,
     grpc_client_channel_factory* client_channel_factory,
     grpc_channel_args* args) {
   grpc_channel* lb_channel = grpc_client_channel_factory_create_channel(
-      exec_ctx, client_channel_factory, lb_service_target_addresses,
+      client_channel_factory, lb_service_target_addresses,
       GRPC_CLIENT_CHANNEL_TYPE_LOAD_BALANCING, args);
   return lb_channel;
 }
 
 grpc_channel_args* grpc_lb_policy_grpclb_build_lb_channel_args(
-    grpc_exec_ctx* exec_ctx, grpc_slice_hash_table* targets_info,
+    grpc_slice_hash_table* targets_info,
     grpc_fake_resolver_response_generator* response_generator,
     const grpc_channel_args* args) {
   const grpc_arg to_add[] = {
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.h b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.h
index 70b1c28b0d..56104b2ec0 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.h
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.h
@@ -31,12 +31,12 @@
  * \a client_channel_factory will be used for the creation of the LB channel,
  * alongside the channel args passed in \a args. */
 grpc_channel* grpc_lb_policy_grpclb_create_lb_channel(
-    grpc_exec_ctx* exec_ctx, const char* lb_service_target_addresses,
+    const char* lb_service_target_addresses,
     grpc_client_channel_factory* client_channel_factory,
     grpc_channel_args* args);
 
 grpc_channel_args* grpc_lb_policy_grpclb_build_lb_channel_args(
-    grpc_exec_ctx* exec_ctx, grpc_slice_hash_table* targets_info,
+    grpc_slice_hash_table* targets_info,
     grpc_fake_resolver_response_generator* response_generator,
     const grpc_channel_args* args);
 
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel_secure.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel_secure.cc
index 8eaa90e97b..76bcddf945 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel_secure.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel_secure.cc
@@ -29,7 +29,7 @@
 #include "src/core/lib/support/string.h"
 
 grpc_channel* grpc_lb_policy_grpclb_create_lb_channel(
-    grpc_exec_ctx* exec_ctx, const char* lb_service_target_addresses,
+    const char* lb_service_target_addresses,
     grpc_client_channel_factory* client_channel_factory,
     grpc_channel_args* args) {
   grpc_channel_args* new_args = args;
@@ -50,19 +50,19 @@ grpc_channel* grpc_lb_policy_grpclb_create_lb_channel(
     new_args = grpc_channel_args_copy_and_add_and_remove(
         args, keys_to_remove, GPR_ARRAY_SIZE(keys_to_remove), args_to_add,
         GPR_ARRAY_SIZE(args_to_add));
-    grpc_channel_credentials_unref(exec_ctx, creds_sans_call_creds);
+    grpc_channel_credentials_unref(creds_sans_call_creds);
   }
   grpc_channel* lb_channel = grpc_client_channel_factory_create_channel(
-      exec_ctx, client_channel_factory, lb_service_target_addresses,
+      client_channel_factory, lb_service_target_addresses,
       GRPC_CLIENT_CHANNEL_TYPE_LOAD_BALANCING, new_args);
   if (channel_credentials != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, new_args);
+    grpc_channel_args_destroy(new_args);
   }
   return lb_channel;
 }
 
 grpc_channel_args* grpc_lb_policy_grpclb_build_lb_channel_args(
-    grpc_exec_ctx* exec_ctx, grpc_slice_hash_table* targets_info,
+    grpc_slice_hash_table* targets_info,
     grpc_fake_resolver_response_generator* response_generator,
     const grpc_channel_args* args) {
   const grpc_arg to_add[] = {
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc
index 2c8d7f4291..fc781da330 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc
@@ -215,9 +215,6 @@ grpc_grpclb_serverlist* grpc_grpclb_response_parse_serverlist(
       return nullptr;
     }
   }
-  if (res.server_list.has_expiration_interval) {
-    sl->expiration_interval = res.server_list.expiration_interval;
-  }
   return sl;
 }
 
@@ -237,8 +234,6 @@ grpc_grpclb_serverlist* grpc_grpclb_serverlist_copy(
   grpc_grpclb_serverlist* copy =
       (grpc_grpclb_serverlist*)gpr_zalloc(sizeof(grpc_grpclb_serverlist));
   copy->num_servers = sl->num_servers;
-  memcpy(&copy->expiration_interval, &sl->expiration_interval,
-         sizeof(grpc_grpclb_duration));
   copy->servers = (grpc_grpclb_server**)gpr_malloc(sizeof(grpc_grpclb_server*) *
                                                    sl->num_servers);
   for (size_t i = 0; i < sl->num_servers; i++) {
@@ -257,10 +252,6 @@ bool grpc_grpclb_serverlist_equals(const grpc_grpclb_serverlist* lhs,
   if (lhs->num_servers != rhs->num_servers) {
     return false;
   }
-  if (grpc_grpclb_duration_compare(&lhs->expiration_interval,
-                                   &rhs->expiration_interval) != 0) {
-    return false;
-  }
   for (size_t i = 0; i < lhs->num_servers; i++) {
     if (!grpc_grpclb_server_equals(lhs->servers[i], rhs->servers[i])) {
       return false;
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h
index 017c40ec1a..ccb0212643 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h
@@ -35,7 +35,6 @@ typedef grpc_lb_v1_Duration grpc_grpclb_duration;
 typedef struct {
   grpc_grpclb_server** servers;
   size_t num_servers;
-  grpc_grpclb_duration expiration_interval;
 } grpc_grpclb_serverlist;
 
 /** Create a request for a gRPC LB service under \a lb_service_name */
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c b/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c
index 6a5d54c82a..4e6c5cc832 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c
@@ -61,9 +61,8 @@ const pb_field_t grpc_lb_v1_InitialLoadBalanceResponse_fields[3] = {
     PB_LAST_FIELD
 };
 
-const pb_field_t grpc_lb_v1_ServerList_fields[3] = {
+const pb_field_t grpc_lb_v1_ServerList_fields[2] = {
     PB_FIELD(  1, MESSAGE , REPEATED, CALLBACK, FIRST, grpc_lb_v1_ServerList, servers, servers, &grpc_lb_v1_Server_fields),
-    PB_FIELD(  3, MESSAGE , OPTIONAL, STATIC  , OTHER, grpc_lb_v1_ServerList, expiration_interval, servers, &grpc_lb_v1_Duration_fields),
     PB_LAST_FIELD
 };
 
@@ -85,7 +84,7 @@ const pb_field_t grpc_lb_v1_Server_fields[5] = {
  * numbers or field sizes that are larger than what can fit in 8 or 16 bit
  * field descriptors.
  */
-PB_STATIC_ASSERT((pb_membersize(grpc_lb_v1_LoadBalanceRequest, initial_request) < 65536 && pb_membersize(grpc_lb_v1_LoadBalanceRequest, client_stats) < 65536 && pb_membersize(grpc_lb_v1_ClientStats, timestamp) < 65536 && pb_membersize(grpc_lb_v1_ClientStats, calls_finished_with_drop) < 65536 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, initial_response) < 65536 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, server_list) < 65536 && pb_membersize(grpc_lb_v1_InitialLoadBalanceResponse, client_stats_report_interval) < 65536 && pb_membersize(grpc_lb_v1_ServerList, servers) < 65536 && pb_membersize(grpc_lb_v1_ServerList, expiration_interval) < 65536), YOU_MUST_DEFINE_PB_FIELD_32BIT_FOR_MESSAGES_grpc_lb_v1_Duration_grpc_lb_v1_Timestamp_grpc_lb_v1_LoadBalanceRequest_grpc_lb_v1_InitialLoadBalanceRequest_grpc_lb_v1_ClientStatsPerToken_grpc_lb_v1_ClientStats_grpc_lb_v1_LoadBalanceResponse_grpc_lb_v1_InitialLoadBalanceResponse_grpc_lb_v1_ServerList_grpc_lb_v1_Server)
+PB_STATIC_ASSERT((pb_membersize(grpc_lb_v1_LoadBalanceRequest, initial_request) < 65536 && pb_membersize(grpc_lb_v1_LoadBalanceRequest, client_stats) < 65536 && pb_membersize(grpc_lb_v1_ClientStats, timestamp) < 65536 && pb_membersize(grpc_lb_v1_ClientStats, calls_finished_with_drop) < 65536 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, initial_response) < 65536 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, server_list) < 65536 && pb_membersize(grpc_lb_v1_InitialLoadBalanceResponse, client_stats_report_interval) < 65536 && pb_membersize(grpc_lb_v1_ServerList, servers) < 65536), YOU_MUST_DEFINE_PB_FIELD_32BIT_FOR_MESSAGES_grpc_lb_v1_Duration_grpc_lb_v1_Timestamp_grpc_lb_v1_LoadBalanceRequest_grpc_lb_v1_InitialLoadBalanceRequest_grpc_lb_v1_ClientStatsPerToken_grpc_lb_v1_ClientStats_grpc_lb_v1_LoadBalanceResponse_grpc_lb_v1_InitialLoadBalanceResponse_grpc_lb_v1_ServerList_grpc_lb_v1_Server)
 #endif
 
 #if !defined(PB_FIELD_16BIT) && !defined(PB_FIELD_32BIT)
@@ -96,7 +95,7 @@ PB_STATIC_ASSERT((pb_membersize(grpc_lb_v1_LoadBalanceRequest, initial_request)
  * numbers or field sizes that are larger than what can fit in the default
  * 8 bit descriptors.
  */
-PB_STATIC_ASSERT((pb_membersize(grpc_lb_v1_LoadBalanceRequest, initial_request) < 256 && pb_membersize(grpc_lb_v1_LoadBalanceRequest, client_stats) < 256 && pb_membersize(grpc_lb_v1_ClientStats, timestamp) < 256 && pb_membersize(grpc_lb_v1_ClientStats, calls_finished_with_drop) < 256 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, initial_response) < 256 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, server_list) < 256 && pb_membersize(grpc_lb_v1_InitialLoadBalanceResponse, client_stats_report_interval) < 256 && pb_membersize(grpc_lb_v1_ServerList, servers) < 256 && pb_membersize(grpc_lb_v1_ServerList, expiration_interval) < 256), YOU_MUST_DEFINE_PB_FIELD_16BIT_FOR_MESSAGES_grpc_lb_v1_Duration_grpc_lb_v1_Timestamp_grpc_lb_v1_LoadBalanceRequest_grpc_lb_v1_InitialLoadBalanceRequest_grpc_lb_v1_ClientStatsPerToken_grpc_lb_v1_ClientStats_grpc_lb_v1_LoadBalanceResponse_grpc_lb_v1_InitialLoadBalanceResponse_grpc_lb_v1_ServerList_grpc_lb_v1_Server)
+PB_STATIC_ASSERT((pb_membersize(grpc_lb_v1_LoadBalanceRequest, initial_request) < 256 && pb_membersize(grpc_lb_v1_LoadBalanceRequest, client_stats) < 256 && pb_membersize(grpc_lb_v1_ClientStats, timestamp) < 256 && pb_membersize(grpc_lb_v1_ClientStats, calls_finished_with_drop) < 256 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, initial_response) < 256 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, server_list) < 256 && pb_membersize(grpc_lb_v1_InitialLoadBalanceResponse, client_stats_report_interval) < 256 && pb_membersize(grpc_lb_v1_ServerList, servers) < 256), YOU_MUST_DEFINE_PB_FIELD_16BIT_FOR_MESSAGES_grpc_lb_v1_Duration_grpc_lb_v1_Timestamp_grpc_lb_v1_LoadBalanceRequest_grpc_lb_v1_InitialLoadBalanceRequest_grpc_lb_v1_ClientStatsPerToken_grpc_lb_v1_ClientStats_grpc_lb_v1_LoadBalanceResponse_grpc_lb_v1_InitialLoadBalanceResponse_grpc_lb_v1_ServerList_grpc_lb_v1_Server)
 #endif
 
 
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h b/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h
index 93333d1aed..066c076202 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h
@@ -14,6 +14,11 @@ extern "C" {
 #endif
 
 /* Struct definitions */
+typedef struct _grpc_lb_v1_ServerList {
+    pb_callback_t servers;
+/* @@protoc_insertion_point(struct:grpc_lb_v1_ServerList) */
+} grpc_lb_v1_ServerList;
+
 typedef struct _grpc_lb_v1_ClientStatsPerToken {
     pb_callback_t load_balance_token;
     bool has_num_calls;
@@ -79,13 +84,6 @@ typedef struct _grpc_lb_v1_InitialLoadBalanceResponse {
 /* @@protoc_insertion_point(struct:grpc_lb_v1_InitialLoadBalanceResponse) */
 } grpc_lb_v1_InitialLoadBalanceResponse;
 
-typedef struct _grpc_lb_v1_ServerList {
-    pb_callback_t servers;
-    bool has_expiration_interval;
-    grpc_lb_v1_Duration expiration_interval;
-/* @@protoc_insertion_point(struct:grpc_lb_v1_ServerList) */
-} grpc_lb_v1_ServerList;
-
 typedef struct _grpc_lb_v1_LoadBalanceRequest {
     bool has_initial_request;
     grpc_lb_v1_InitialLoadBalanceRequest initial_request;
@@ -113,7 +111,7 @@ typedef struct _grpc_lb_v1_LoadBalanceResponse {
 #define grpc_lb_v1_ClientStats_init_default      {false, grpc_lb_v1_Timestamp_init_default, false, 0, false, 0, false, 0, false, 0, {{NULL}, NULL}}
 #define grpc_lb_v1_LoadBalanceResponse_init_default {false, grpc_lb_v1_InitialLoadBalanceResponse_init_default, false, grpc_lb_v1_ServerList_init_default}
 #define grpc_lb_v1_InitialLoadBalanceResponse_init_default {false, "", false, grpc_lb_v1_Duration_init_default}
-#define grpc_lb_v1_ServerList_init_default       {{{NULL}, NULL}, false, grpc_lb_v1_Duration_init_default}
+#define grpc_lb_v1_ServerList_init_default       {{{NULL}, NULL}}
 #define grpc_lb_v1_Server_init_default           {false, {0, {0}}, false, 0, false, "", false, 0}
 #define grpc_lb_v1_Duration_init_zero            {false, 0, false, 0}
 #define grpc_lb_v1_Timestamp_init_zero           {false, 0, false, 0}
@@ -123,10 +121,11 @@ typedef struct _grpc_lb_v1_LoadBalanceResponse {
 #define grpc_lb_v1_ClientStats_init_zero         {false, grpc_lb_v1_Timestamp_init_zero, false, 0, false, 0, false, 0, false, 0, {{NULL}, NULL}}
 #define grpc_lb_v1_LoadBalanceResponse_init_zero {false, grpc_lb_v1_InitialLoadBalanceResponse_init_zero, false, grpc_lb_v1_ServerList_init_zero}
 #define grpc_lb_v1_InitialLoadBalanceResponse_init_zero {false, "", false, grpc_lb_v1_Duration_init_zero}
-#define grpc_lb_v1_ServerList_init_zero          {{{NULL}, NULL}, false, grpc_lb_v1_Duration_init_zero}
+#define grpc_lb_v1_ServerList_init_zero          {{{NULL}, NULL}}
 #define grpc_lb_v1_Server_init_zero              {false, {0, {0}}, false, 0, false, "", false, 0}
 
 /* Field tags (for use in manual encoding/decoding) */
+#define grpc_lb_v1_ServerList_servers_tag        1
 #define grpc_lb_v1_ClientStatsPerToken_load_balance_token_tag 1
 #define grpc_lb_v1_ClientStatsPerToken_num_calls_tag 2
 #define grpc_lb_v1_Duration_seconds_tag          1
@@ -146,8 +145,6 @@ typedef struct _grpc_lb_v1_LoadBalanceResponse {
 #define grpc_lb_v1_ClientStats_calls_finished_with_drop_tag 8
 #define grpc_lb_v1_InitialLoadBalanceResponse_load_balancer_delegate_tag 1
 #define grpc_lb_v1_InitialLoadBalanceResponse_client_stats_report_interval_tag 2
-#define grpc_lb_v1_ServerList_servers_tag        1
-#define grpc_lb_v1_ServerList_expiration_interval_tag 3
 #define grpc_lb_v1_LoadBalanceRequest_initial_request_tag 1
 #define grpc_lb_v1_LoadBalanceRequest_client_stats_tag 2
 #define grpc_lb_v1_LoadBalanceResponse_initial_response_tag 1
@@ -162,7 +159,7 @@ extern const pb_field_t grpc_lb_v1_ClientStatsPerToken_fields[3];
 extern const pb_field_t grpc_lb_v1_ClientStats_fields[7];
 extern const pb_field_t grpc_lb_v1_LoadBalanceResponse_fields[3];
 extern const pb_field_t grpc_lb_v1_InitialLoadBalanceResponse_fields[3];
-extern const pb_field_t grpc_lb_v1_ServerList_fields[3];
+extern const pb_field_t grpc_lb_v1_ServerList_fields[2];
 extern const pb_field_t grpc_lb_v1_Server_fields[5];
 
 /* Maximum encoded size of messages (where known) */
diff --git a/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc b/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc
index 228a77d9db..0861261359 100644
--- a/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc
@@ -57,12 +57,12 @@ typedef struct {
   grpc_connectivity_state_tracker state_tracker;
 } pick_first_lb_policy;
 
-static void pf_destroy(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void pf_destroy(grpc_lb_policy* pol) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
   GPR_ASSERT(p->subchannel_list == nullptr);
   GPR_ASSERT(p->latest_pending_subchannel_list == nullptr);
   GPR_ASSERT(p->pending_picks == nullptr);
-  grpc_connectivity_state_destroy(exec_ctx, &p->state_tracker);
+  grpc_connectivity_state_destroy(&p->state_tracker);
   gpr_free(p);
   grpc_subchannel_index_unref();
   if (grpc_lb_pick_first_trace.enabled()) {
@@ -70,7 +70,7 @@ static void pf_destroy(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
   }
 }
 
-static void pf_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void pf_shutdown_locked(grpc_lb_policy* pol) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
   grpc_error* error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel shutdown");
   if (grpc_lb_pick_first_trace.enabled()) {
@@ -81,28 +81,27 @@ static void pf_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
   while ((pp = p->pending_picks) != nullptr) {
     p->pending_picks = pp->next;
     *pp->target = nullptr;
-    GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(pp->on_complete, GRPC_ERROR_REF(error));
     gpr_free(pp);
   }
-  grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                              GRPC_CHANNEL_SHUTDOWN, GRPC_ERROR_REF(error),
-                              "shutdown");
+  grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_SHUTDOWN,
+                              GRPC_ERROR_REF(error), "shutdown");
   if (p->subchannel_list != nullptr) {
-    grpc_lb_subchannel_list_shutdown_and_unref(exec_ctx, p->subchannel_list,
+    grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
                                                "pf_shutdown");
     p->subchannel_list = nullptr;
   }
   if (p->latest_pending_subchannel_list != nullptr) {
     grpc_lb_subchannel_list_shutdown_and_unref(
-        exec_ctx, p->latest_pending_subchannel_list, "pf_shutdown");
+        p->latest_pending_subchannel_list, "pf_shutdown");
     p->latest_pending_subchannel_list = nullptr;
   }
-  grpc_lb_policy_try_reresolve(exec_ctx, &p->base, &grpc_lb_pick_first_trace,
+  grpc_lb_policy_try_reresolve(&p->base, &grpc_lb_pick_first_trace,
                                GRPC_ERROR_CANCELLED);
   GRPC_ERROR_UNREF(error);
 }
 
-static void pf_cancel_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static void pf_cancel_pick_locked(grpc_lb_policy* pol,
                                   grpc_connected_subchannel** target,
                                   grpc_error* error) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
@@ -112,7 +111,7 @@ static void pf_cancel_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
     pending_pick* next = pp->next;
     if (pp->target == target) {
       *target = nullptr;
-      GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete,
+      GRPC_CLOSURE_SCHED(pp->on_complete,
                          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Pick Cancelled", &error, 1));
       gpr_free(pp);
@@ -125,7 +124,7 @@ static void pf_cancel_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
   GRPC_ERROR_UNREF(error);
 }
 
-static void pf_cancel_picks_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static void pf_cancel_picks_locked(grpc_lb_policy* pol,
                                    uint32_t initial_metadata_flags_mask,
                                    uint32_t initial_metadata_flags_eq,
                                    grpc_error* error) {
@@ -136,7 +135,7 @@ static void pf_cancel_picks_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
     pending_pick* next = pp->next;
     if ((pp->initial_metadata_flags & initial_metadata_flags_mask) ==
         initial_metadata_flags_eq) {
-      GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete,
+      GRPC_CLOSURE_SCHED(pp->on_complete,
                          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Pick Cancelled", &error, 1));
       gpr_free(pp);
@@ -149,8 +148,7 @@ static void pf_cancel_picks_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
   GRPC_ERROR_UNREF(error);
 }
 
-static void start_picking_locked(grpc_exec_ctx* exec_ctx,
-                                 pick_first_lb_policy* p) {
+static void start_picking_locked(pick_first_lb_policy* p) {
   p->started_picking = true;
   if (p->subchannel_list != nullptr &&
       p->subchannel_list->num_subchannels > 0) {
@@ -160,21 +158,21 @@ static void start_picking_locked(grpc_exec_ctx* exec_ctx,
         grpc_lb_subchannel_list_ref_for_connectivity_watch(
             p->subchannel_list, "connectivity_watch+start_picking");
         grpc_lb_subchannel_data_start_connectivity_watch(
-            exec_ctx, &p->subchannel_list->subchannels[i]);
+            &p->subchannel_list->subchannels[i]);
         break;
       }
     }
   }
 }
 
-static void pf_exit_idle_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void pf_exit_idle_locked(grpc_lb_policy* pol) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
   if (!p->started_picking) {
-    start_picking_locked(exec_ctx, p);
+    start_picking_locked(p);
   }
 }
 
-static int pf_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static int pf_pick_locked(grpc_lb_policy* pol,
                           const grpc_lb_policy_pick_args* pick_args,
                           grpc_connected_subchannel** target,
                           grpc_call_context_element* context, void** user_data,
@@ -188,7 +186,7 @@ static int pf_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
   }
   // No subchannel selected yet, so handle asynchronously.
   if (!p->started_picking) {
-    start_picking_locked(exec_ctx, p);
+    start_picking_locked(p);
   }
   pending_pick* pp = (pending_pick*)gpr_malloc(sizeof(*pp));
   pp->next = p->pending_picks;
@@ -199,48 +197,47 @@ static int pf_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
   return 0;
 }
 
-static void destroy_unselected_subchannels_locked(grpc_exec_ctx* exec_ctx,
-                                                  pick_first_lb_policy* p) {
+static void destroy_unselected_subchannels_locked(pick_first_lb_policy* p) {
   for (size_t i = 0; i < p->subchannel_list->num_subchannels; ++i) {
     grpc_lb_subchannel_data* sd = &p->subchannel_list->subchannels[i];
     if (p->selected != sd) {
-      grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd,
+      grpc_lb_subchannel_data_unref_subchannel(sd,
                                                "selected_different_subchannel");
     }
   }
 }
 
 static grpc_connectivity_state pf_check_connectivity_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol, grpc_error** error) {
+    grpc_lb_policy* pol, grpc_error** error) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
   return grpc_connectivity_state_get(&p->state_tracker, error);
 }
 
-static void pf_notify_on_state_change_locked(grpc_exec_ctx* exec_ctx,
-                                             grpc_lb_policy* pol,
+static void pf_notify_on_state_change_locked(grpc_lb_policy* pol,
                                              grpc_connectivity_state* current,
                                              grpc_closure* notify) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
-  grpc_connectivity_state_notify_on_state_change(exec_ctx, &p->state_tracker,
-                                                 current, notify);
+  grpc_connectivity_state_notify_on_state_change(&p->state_tracker, current,
+                                                 notify);
 }
 
-static void pf_ping_one_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
-                               grpc_closure* closure) {
+static void pf_ping_one_locked(grpc_lb_policy* pol, grpc_closure* on_initiate,
+                               grpc_closure* on_ack) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
   if (p->selected) {
-    grpc_connected_subchannel_ping(exec_ctx, p->selected->connected_subchannel,
-                                   closure);
+    grpc_connected_subchannel_ping(p->selected->connected_subchannel,
+                                   on_initiate, on_ack);
   } else {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure,
+    GRPC_CLOSURE_SCHED(on_initiate,
+                       GRPC_ERROR_CREATE_FROM_STATIC_STRING("Not connected"));
+    GRPC_CLOSURE_SCHED(on_ack,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Not connected"));
   }
 }
 
-static void pf_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error);
+static void pf_connectivity_changed_locked(void* arg, grpc_error* error);
 
-static void pf_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+static void pf_update_locked(grpc_lb_policy* policy,
                              const grpc_lb_policy_args* args) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)policy;
   const grpc_arg* arg =
@@ -249,7 +246,7 @@ static void pf_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
     if (p->subchannel_list == nullptr) {
       // If we don't have a current subchannel list, go into TRANSIENT FAILURE.
       grpc_connectivity_state_set(
-          exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+          &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Missing update in args"),
           "pf_update_missing");
     } else {
@@ -268,17 +265,17 @@ static void pf_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
             (void*)p, (unsigned long)addresses->num_addresses);
   }
   grpc_lb_subchannel_list* subchannel_list = grpc_lb_subchannel_list_create(
-      exec_ctx, &p->base, &grpc_lb_pick_first_trace, addresses, args,
+      &p->base, &grpc_lb_pick_first_trace, addresses, args,
       pf_connectivity_changed_locked);
   if (subchannel_list->num_subchannels == 0) {
     // Empty update or no valid subchannels. Unsubscribe from all current
     // subchannels and put the channel in TRANSIENT_FAILURE.
     grpc_connectivity_state_set(
-        exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+        &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Empty update"),
         "pf_update_empty");
     if (p->subchannel_list != nullptr) {
-      grpc_lb_subchannel_list_shutdown_and_unref(exec_ctx, p->subchannel_list,
+      grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
                                                  "sl_shutdown_empty_update");
     }
     p->subchannel_list = subchannel_list;  // Empty list.
@@ -289,7 +286,7 @@ static void pf_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
     // We don't yet have a selected subchannel, so replace the current
     // subchannel list immediately.
     if (p->subchannel_list != nullptr) {
-      grpc_lb_subchannel_list_shutdown_and_unref(exec_ctx, p->subchannel_list,
+      grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
                                                  "pf_update_before_selected");
     }
     p->subchannel_list = subchannel_list;
@@ -314,19 +311,19 @@ static void pf_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
         p->selected = sd;
         if (p->subchannel_list != nullptr) {
           grpc_lb_subchannel_list_shutdown_and_unref(
-              exec_ctx, p->subchannel_list, "pf_update_includes_selected");
+              p->subchannel_list, "pf_update_includes_selected");
         }
         p->subchannel_list = subchannel_list;
-        destroy_unselected_subchannels_locked(exec_ctx, p);
+        destroy_unselected_subchannels_locked(p);
         grpc_lb_subchannel_list_ref_for_connectivity_watch(
             subchannel_list, "connectivity_watch+replace_selected");
-        grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
+        grpc_lb_subchannel_data_start_connectivity_watch(sd);
         // If there was a previously pending update (which may or may
         // not have contained the currently selected subchannel), drop
         // it, so that it doesn't override what we've done here.
         if (p->latest_pending_subchannel_list != nullptr) {
           grpc_lb_subchannel_list_shutdown_and_unref(
-              exec_ctx, p->latest_pending_subchannel_list,
+              p->latest_pending_subchannel_list,
               "pf_update_includes_selected+outdated");
           p->latest_pending_subchannel_list = nullptr;
         }
@@ -346,8 +343,7 @@ static void pf_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
                 (void*)subchannel_list);
       }
       grpc_lb_subchannel_list_shutdown_and_unref(
-          exec_ctx, p->latest_pending_subchannel_list,
-          "sl_outdated_dont_smash");
+          p->latest_pending_subchannel_list, "sl_outdated_dont_smash");
     }
     p->latest_pending_subchannel_list = subchannel_list;
   }
@@ -357,12 +353,11 @@ static void pf_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
     grpc_lb_subchannel_list_ref_for_connectivity_watch(
         subchannel_list, "connectivity_watch+update");
     grpc_lb_subchannel_data_start_connectivity_watch(
-        exec_ctx, &subchannel_list->subchannels[0]);
+        &subchannel_list->subchannels[0]);
   }
 }
 
-static void pf_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void pf_connectivity_changed_locked(void* arg, grpc_error* error) {
   grpc_lb_subchannel_data* sd = (grpc_lb_subchannel_data*)arg;
   pick_first_lb_policy* p = (pick_first_lb_policy*)sd->subchannel_list->policy;
   if (grpc_lb_pick_first_trace.enabled()) {
@@ -380,18 +375,18 @@ static void pf_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
   }
   // If the policy is shutting down, unref and return.
   if (p->shutdown) {
-    grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
-    grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd, "pf_shutdown");
-    grpc_lb_subchannel_list_unref_for_connectivity_watch(
-        exec_ctx, sd->subchannel_list, "pf_shutdown");
+    grpc_lb_subchannel_data_stop_connectivity_watch(sd);
+    grpc_lb_subchannel_data_unref_subchannel(sd, "pf_shutdown");
+    grpc_lb_subchannel_list_unref_for_connectivity_watch(sd->subchannel_list,
+                                                         "pf_shutdown");
     return;
   }
   // If the subchannel list is shutting down, stop watching.
   if (sd->subchannel_list->shutting_down || error == GRPC_ERROR_CANCELLED) {
-    grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
-    grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd, "pf_sl_shutdown");
-    grpc_lb_subchannel_list_unref_for_connectivity_watch(
-        exec_ctx, sd->subchannel_list, "pf_sl_shutdown");
+    grpc_lb_subchannel_data_stop_connectivity_watch(sd);
+    grpc_lb_subchannel_data_unref_subchannel(sd, "pf_sl_shutdown");
+    grpc_lb_subchannel_list_unref_for_connectivity_watch(sd->subchannel_list,
+                                                         "pf_sl_shutdown");
     return;
   }
   // If we're still here, the notification must be for a subchannel in
@@ -407,15 +402,15 @@ static void pf_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
     if (sd->curr_connectivity_state != GRPC_CHANNEL_READY &&
         p->latest_pending_subchannel_list != nullptr) {
       p->selected = nullptr;
-      grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
+      grpc_lb_subchannel_data_stop_connectivity_watch(sd);
       grpc_lb_subchannel_list_unref_for_connectivity_watch(
-          exec_ctx, sd->subchannel_list, "selected_not_ready+switch_to_update");
+          sd->subchannel_list, "selected_not_ready+switch_to_update");
       grpc_lb_subchannel_list_shutdown_and_unref(
-          exec_ctx, p->subchannel_list, "selected_not_ready+switch_to_update");
+          p->subchannel_list, "selected_not_ready+switch_to_update");
       p->subchannel_list = p->latest_pending_subchannel_list;
       p->latest_pending_subchannel_list = nullptr;
       grpc_connectivity_state_set(
-          exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+          &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
           GRPC_ERROR_REF(error), "selected_not_ready+switch_to_update");
     } else {
       // TODO(juanlishen): we re-resolve when the selected subchannel goes to
@@ -426,27 +421,26 @@ static void pf_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
       if (sd->curr_connectivity_state == GRPC_CHANNEL_SHUTDOWN ||
           sd->curr_connectivity_state == GRPC_CHANNEL_TRANSIENT_FAILURE) {
         // If the selected channel goes bad, request a re-resolution.
-        grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                                    GRPC_CHANNEL_IDLE, GRPC_ERROR_NONE,
+        grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_IDLE,
+                                    GRPC_ERROR_NONE,
                                     "selected_changed+reresolve");
         p->started_picking = false;
-        grpc_lb_policy_try_reresolve(
-            exec_ctx, &p->base, &grpc_lb_pick_first_trace, GRPC_ERROR_NONE);
+        grpc_lb_policy_try_reresolve(&p->base, &grpc_lb_pick_first_trace,
+                                     GRPC_ERROR_NONE);
       } else {
-        grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
+        grpc_connectivity_state_set(&p->state_tracker,
                                     sd->curr_connectivity_state,
                                     GRPC_ERROR_REF(error), "selected_changed");
       }
       if (sd->curr_connectivity_state != GRPC_CHANNEL_SHUTDOWN) {
         // Renew notification.
-        grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
+        grpc_lb_subchannel_data_start_connectivity_watch(sd);
       } else {
         p->selected = nullptr;
-        grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
+        grpc_lb_subchannel_data_stop_connectivity_watch(sd);
         grpc_lb_subchannel_list_unref_for_connectivity_watch(
-            exec_ctx, sd->subchannel_list, "pf_selected_shutdown");
-        grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd,
-                                                 "pf_selected_shutdown");
+            sd->subchannel_list, "pf_selected_shutdown");
+        grpc_lb_subchannel_data_unref_subchannel(sd, "pf_selected_shutdown");
       }
     }
     return;
@@ -466,15 +460,14 @@ static void pf_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
       // p->subchannel_list.
       if (sd->subchannel_list == p->latest_pending_subchannel_list) {
         GPR_ASSERT(p->subchannel_list != nullptr);
-        grpc_lb_subchannel_list_shutdown_and_unref(exec_ctx, p->subchannel_list,
+        grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
                                                    "finish_update");
         p->subchannel_list = p->latest_pending_subchannel_list;
         p->latest_pending_subchannel_list = nullptr;
       }
       // Cases 1 and 2.
-      grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                                  GRPC_CHANNEL_READY, GRPC_ERROR_NONE,
-                                  "connecting_ready");
+      grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_READY,
+                                  GRPC_ERROR_NONE, "connecting_ready");
       sd->connected_subchannel = GRPC_CONNECTED_SUBCHANNEL_REF(
           grpc_subchannel_get_connected_subchannel(sd->subchannel),
           "connected");
@@ -484,7 +477,7 @@ static void pf_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
                 (void*)sd->subchannel);
       }
       // Drop all other subchannels, since we are now connected.
-      destroy_unselected_subchannels_locked(exec_ctx, p);
+      destroy_unselected_subchannels_locked(p);
       // Update any calls that were waiting for a pick.
       pending_pick* pp;
       while ((pp = p->pending_picks)) {
@@ -496,15 +489,15 @@ static void pf_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
                   "Servicing pending pick with selected subchannel %p",
                   (void*)p->selected);
         }
-        GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete, GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(pp->on_complete, GRPC_ERROR_NONE);
         gpr_free(pp);
       }
       // Renew notification.
-      grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
+      grpc_lb_subchannel_data_start_connectivity_watch(sd);
       break;
     }
     case GRPC_CHANNEL_TRANSIENT_FAILURE: {
-      grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
+      grpc_lb_subchannel_data_stop_connectivity_watch(sd);
       do {
         sd->subchannel_list->checking_subchannel =
             (sd->subchannel_list->checking_subchannel + 1) %
@@ -517,29 +510,28 @@ static void pf_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
       if (sd->subchannel_list->checking_subchannel == 0 &&
           sd->subchannel_list == p->subchannel_list) {
         grpc_connectivity_state_set(
-            exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+            &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
             GRPC_ERROR_REF(error), "connecting_transient_failure");
       }
       // Reuses the connectivity refs from the previous watch.
-      grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
+      grpc_lb_subchannel_data_start_connectivity_watch(sd);
       break;
     }
     case GRPC_CHANNEL_CONNECTING:
     case GRPC_CHANNEL_IDLE: {
       // Only update connectivity state in case 1.
       if (sd->subchannel_list == p->subchannel_list) {
-        grpc_connectivity_state_set(
-            exec_ctx, &p->state_tracker, GRPC_CHANNEL_CONNECTING,
-            GRPC_ERROR_REF(error), "connecting_changed");
+        grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_CONNECTING,
+                                    GRPC_ERROR_REF(error),
+                                    "connecting_changed");
       }
       // Renew notification.
-      grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
+      grpc_lb_subchannel_data_start_connectivity_watch(sd);
       break;
     }
     case GRPC_CHANNEL_SHUTDOWN: {
-      grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
-      grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd,
-                                               "pf_candidate_shutdown");
+      grpc_lb_subchannel_data_stop_connectivity_watch(sd);
+      grpc_lb_subchannel_data_unref_subchannel(sd, "pf_candidate_shutdown");
       // Advance to next subchannel and check its state.
       grpc_lb_subchannel_data* original_sd = sd;
       do {
@@ -551,31 +543,30 @@ static void pf_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
       } while (sd->subchannel == nullptr && sd != original_sd);
       if (sd == original_sd) {
         grpc_lb_subchannel_list_unref_for_connectivity_watch(
-            exec_ctx, sd->subchannel_list, "pf_exhausted_subchannels");
+            sd->subchannel_list, "pf_exhausted_subchannels");
         if (sd->subchannel_list == p->subchannel_list) {
-          grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                                      GRPC_CHANNEL_IDLE, GRPC_ERROR_NONE,
+          grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_IDLE,
+                                      GRPC_ERROR_NONE,
                                       "exhausted_subchannels+reresolve");
           p->started_picking = false;
-          grpc_lb_policy_try_reresolve(
-              exec_ctx, &p->base, &grpc_lb_pick_first_trace, GRPC_ERROR_NONE);
+          grpc_lb_policy_try_reresolve(&p->base, &grpc_lb_pick_first_trace,
+                                       GRPC_ERROR_NONE);
         }
       } else {
         if (sd->subchannel_list == p->subchannel_list) {
           grpc_connectivity_state_set(
-              exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+              &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
               GRPC_ERROR_REF(error), "subchannel_failed");
         }
         // Reuses the connectivity refs from the previous watch.
-        grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
+        grpc_lb_subchannel_data_start_connectivity_watch(sd);
       }
     }
   }
 }
 
 static void pf_set_reresolve_closure_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-    grpc_closure* request_reresolution) {
+    grpc_lb_policy* policy, grpc_closure* request_reresolution) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)policy;
   GPR_ASSERT(!p->shutdown);
   GPR_ASSERT(policy->request_reresolution == nullptr);
@@ -599,15 +590,14 @@ static void pick_first_factory_ref(grpc_lb_policy_factory* factory) {}
 
 static void pick_first_factory_unref(grpc_lb_policy_factory* factory) {}
 
-static grpc_lb_policy* create_pick_first(grpc_exec_ctx* exec_ctx,
-                                         grpc_lb_policy_factory* factory,
+static grpc_lb_policy* create_pick_first(grpc_lb_policy_factory* factory,
                                          grpc_lb_policy_args* args) {
   GPR_ASSERT(args->client_channel_factory != nullptr);
   pick_first_lb_policy* p = (pick_first_lb_policy*)gpr_zalloc(sizeof(*p));
   if (grpc_lb_pick_first_trace.enabled()) {
     gpr_log(GPR_DEBUG, "Pick First %p created.", (void*)p);
   }
-  pf_update_locked(exec_ctx, &p->base, args);
+  pf_update_locked(&p->base, args);
   grpc_lb_policy_init(&p->base, &pick_first_lb_policy_vtable, args->combiner);
   grpc_subchannel_index_ref();
   return &p->base;
diff --git a/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc b/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc
index f68daba474..b0c84017df 100644
--- a/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc
@@ -154,7 +154,7 @@ static void update_last_ready_subchannel_index_locked(round_robin_lb_policy* p,
   }
 }
 
-static void rr_destroy(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void rr_destroy(grpc_lb_policy* pol) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
   if (grpc_lb_round_robin_trace.enabled()) {
     gpr_log(GPR_DEBUG, "[RR %p] Destroying Round Robin policy at %p",
@@ -162,12 +162,12 @@ static void rr_destroy(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
   }
   GPR_ASSERT(p->subchannel_list == nullptr);
   GPR_ASSERT(p->latest_pending_subchannel_list == nullptr);
-  grpc_connectivity_state_destroy(exec_ctx, &p->state_tracker);
+  grpc_connectivity_state_destroy(&p->state_tracker);
   grpc_subchannel_index_unref();
   gpr_free(p);
 }
 
-static void rr_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void rr_shutdown_locked(grpc_lb_policy* pol) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
   grpc_error* error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel shutdown");
   if (grpc_lb_round_robin_trace.enabled()) {
@@ -178,29 +178,27 @@ static void rr_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
   while ((pp = p->pending_picks) != nullptr) {
     p->pending_picks = pp->next;
     *pp->target = nullptr;
-    GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(pp->on_complete, GRPC_ERROR_REF(error));
     gpr_free(pp);
   }
-  grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                              GRPC_CHANNEL_SHUTDOWN, GRPC_ERROR_REF(error),
-                              "rr_shutdown");
+  grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_SHUTDOWN,
+                              GRPC_ERROR_REF(error), "rr_shutdown");
   if (p->subchannel_list != nullptr) {
-    grpc_lb_subchannel_list_shutdown_and_unref(exec_ctx, p->subchannel_list,
+    grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
                                                "sl_shutdown_rr_shutdown");
     p->subchannel_list = nullptr;
   }
   if (p->latest_pending_subchannel_list != nullptr) {
     grpc_lb_subchannel_list_shutdown_and_unref(
-        exec_ctx, p->latest_pending_subchannel_list,
-        "sl_shutdown_pending_rr_shutdown");
+        p->latest_pending_subchannel_list, "sl_shutdown_pending_rr_shutdown");
     p->latest_pending_subchannel_list = nullptr;
   }
-  grpc_lb_policy_try_reresolve(exec_ctx, &p->base, &grpc_lb_round_robin_trace,
+  grpc_lb_policy_try_reresolve(&p->base, &grpc_lb_round_robin_trace,
                                GRPC_ERROR_CANCELLED);
   GRPC_ERROR_UNREF(error);
 }
 
-static void rr_cancel_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static void rr_cancel_pick_locked(grpc_lb_policy* pol,
                                   grpc_connected_subchannel** target,
                                   grpc_error* error) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
@@ -210,7 +208,7 @@ static void rr_cancel_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
     pending_pick* next = pp->next;
     if (pp->target == target) {
       *target = nullptr;
-      GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete,
+      GRPC_CLOSURE_SCHED(pp->on_complete,
                          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Pick cancelled", &error, 1));
       gpr_free(pp);
@@ -223,7 +221,7 @@ static void rr_cancel_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
   GRPC_ERROR_UNREF(error);
 }
 
-static void rr_cancel_picks_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static void rr_cancel_picks_locked(grpc_lb_policy* pol,
                                    uint32_t initial_metadata_flags_mask,
                                    uint32_t initial_metadata_flags_eq,
                                    grpc_error* error) {
@@ -235,7 +233,7 @@ static void rr_cancel_picks_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
     if ((pp->initial_metadata_flags & initial_metadata_flags_mask) ==
         initial_metadata_flags_eq) {
       *pp->target = nullptr;
-      GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete,
+      GRPC_CLOSURE_SCHED(pp->on_complete,
                          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Pick cancelled", &error, 1));
       gpr_free(pp);
@@ -248,27 +246,26 @@ static void rr_cancel_picks_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
   GRPC_ERROR_UNREF(error);
 }
 
-static void start_picking_locked(grpc_exec_ctx* exec_ctx,
-                                 round_robin_lb_policy* p) {
+static void start_picking_locked(round_robin_lb_policy* p) {
   p->started_picking = true;
   for (size_t i = 0; i < p->subchannel_list->num_subchannels; i++) {
     if (p->subchannel_list->subchannels[i].subchannel != nullptr) {
       grpc_lb_subchannel_list_ref_for_connectivity_watch(p->subchannel_list,
                                                          "connectivity_watch");
       grpc_lb_subchannel_data_start_connectivity_watch(
-          exec_ctx, &p->subchannel_list->subchannels[i]);
+          &p->subchannel_list->subchannels[i]);
     }
   }
 }
 
-static void rr_exit_idle_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void rr_exit_idle_locked(grpc_lb_policy* pol) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
   if (!p->started_picking) {
-    start_picking_locked(exec_ctx, p);
+    start_picking_locked(p);
   }
 }
 
-static int rr_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static int rr_pick_locked(grpc_lb_policy* pol,
                           const grpc_lb_policy_pick_args* pick_args,
                           grpc_connected_subchannel** target,
                           grpc_call_context_element* context, void** user_data,
@@ -305,7 +302,7 @@ static int rr_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
   }
   /* no pick currently available. Save for later in list of pending picks */
   if (!p->started_picking) {
-    start_picking_locked(exec_ctx, p);
+    start_picking_locked(p);
   }
   pending_pick* pp = (pending_pick*)gpr_malloc(sizeof(*pp));
   pp->next = p->pending_picks;
@@ -348,8 +345,7 @@ static void update_state_counters_locked(grpc_lb_subchannel_data* sd) {
  * (the grpc_lb_subchannel_data associated with the updated subchannel) and the
  * subchannel list \a sd belongs to (sd->subchannel_list). \a error will be used
  * only if the policy transitions to state TRANSIENT_FAILURE. */
-static void update_lb_connectivity_status_locked(grpc_exec_ctx* exec_ctx,
-                                                 grpc_lb_subchannel_data* sd,
+static void update_lb_connectivity_status_locked(grpc_lb_subchannel_data* sd,
                                                  grpc_error* error) {
   /* In priority order. The first rule to match terminates the search (ie, if we
    * are on rule n, all previous rules were unfulfilled).
@@ -365,55 +361,45 @@ static void update_lb_connectivity_status_locked(grpc_exec_ctx* exec_ctx,
    *    CHECK: subchannel_list->num_shutdown ==
    *           subchannel_list->num_subchannels.
    *
-   * 4) RULE: ALL subchannels are TRANSIENT_FAILURE => policy is
+   * 4) RULE: ALL subchannels are SHUTDOWN or TRANSIENT_FAILURE => policy is
    *          TRANSIENT_FAILURE.
-   *    CHECK: subchannel_list->num_transient_failures ==
+   *    CHECK: subchannel_list->num_shutdown +
+   *             subchannel_list->num_transient_failures ==
    *           subchannel_list->num_subchannels.
-   *
-   * 5) RULE: ALL subchannels are IDLE => policy is IDLE.
-   *    CHECK: subchannel_list->num_idle == subchannel_list->num_subchannels.
-   *    (Note that all the subchannels will transition from IDLE to CONNECTING
-   *    in batch when we start trying to connect.)
    */
-  // TODO(juanlishen): if the subchannel states are mixed by {SHUTDOWN,
-  // TRANSIENT_FAILURE}, we don't change the state. We may want to improve on
-  // this.
+  // TODO(juanlishen): For rule 4, we may want to re-resolve instead.
   grpc_lb_subchannel_list* subchannel_list = sd->subchannel_list;
   round_robin_lb_policy* p = (round_robin_lb_policy*)subchannel_list->policy;
+  GPR_ASSERT(sd->curr_connectivity_state != GRPC_CHANNEL_IDLE);
   if (subchannel_list->num_ready > 0) {
     /* 1) READY */
-    grpc_connectivity_state_set(exec_ctx, &p->state_tracker, GRPC_CHANNEL_READY,
+    grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_READY,
                                 GRPC_ERROR_NONE, "rr_ready");
   } else if (sd->curr_connectivity_state == GRPC_CHANNEL_CONNECTING) {
     /* 2) CONNECTING */
-    grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                                GRPC_CHANNEL_CONNECTING, GRPC_ERROR_NONE,
-                                "rr_connecting");
+    grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_CONNECTING,
+                                GRPC_ERROR_NONE, "rr_connecting");
   } else if (subchannel_list->num_shutdown ==
              subchannel_list->num_subchannels) {
     /* 3) IDLE and re-resolve */
-    grpc_connectivity_state_set(exec_ctx, &p->state_tracker, GRPC_CHANNEL_IDLE,
+    grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_IDLE,
                                 GRPC_ERROR_NONE,
                                 "rr_exhausted_subchannels+reresolve");
     p->started_picking = false;
-    grpc_lb_policy_try_reresolve(exec_ctx, &p->base, &grpc_lb_round_robin_trace,
+    grpc_lb_policy_try_reresolve(&p->base, &grpc_lb_round_robin_trace,
                                  GRPC_ERROR_NONE);
-  } else if (subchannel_list->num_transient_failures ==
+  } else if (subchannel_list->num_shutdown +
+                 subchannel_list->num_transient_failures ==
              subchannel_list->num_subchannels) {
     /* 4) TRANSIENT_FAILURE */
-    grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
+    grpc_connectivity_state_set(&p->state_tracker,
                                 GRPC_CHANNEL_TRANSIENT_FAILURE,
                                 GRPC_ERROR_REF(error), "rr_transient_failure");
-  } else if (subchannel_list->num_idle == subchannel_list->num_subchannels) {
-    /* 5) IDLE */
-    grpc_connectivity_state_set(exec_ctx, &p->state_tracker, GRPC_CHANNEL_IDLE,
-                                GRPC_ERROR_NONE, "rr_idle");
   }
   GRPC_ERROR_UNREF(error);
 }
 
-static void rr_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void rr_connectivity_changed_locked(void* arg, grpc_error* error) {
   grpc_lb_subchannel_data* sd = (grpc_lb_subchannel_data*)arg;
   round_robin_lb_policy* p =
       (round_robin_lb_policy*)sd->subchannel_list->policy;
@@ -431,18 +417,18 @@ static void rr_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
   }
   // If the policy is shutting down, unref and return.
   if (p->shutdown) {
-    grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
-    grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd, "rr_shutdown");
-    grpc_lb_subchannel_list_unref_for_connectivity_watch(
-        exec_ctx, sd->subchannel_list, "rr_shutdown");
+    grpc_lb_subchannel_data_stop_connectivity_watch(sd);
+    grpc_lb_subchannel_data_unref_subchannel(sd, "rr_shutdown");
+    grpc_lb_subchannel_list_unref_for_connectivity_watch(sd->subchannel_list,
+                                                         "rr_shutdown");
     return;
   }
   // If the subchannel list is shutting down, stop watching.
   if (sd->subchannel_list->shutting_down || error == GRPC_ERROR_CANCELLED) {
-    grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
-    grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd, "rr_sl_shutdown");
-    grpc_lb_subchannel_list_unref_for_connectivity_watch(
-        exec_ctx, sd->subchannel_list, "rr_sl_shutdown");
+    grpc_lb_subchannel_data_stop_connectivity_watch(sd);
+    grpc_lb_subchannel_data_unref_subchannel(sd, "rr_sl_shutdown");
+    grpc_lb_subchannel_list_unref_for_connectivity_watch(sd->subchannel_list,
+                                                         "rr_sl_shutdown");
     return;
   }
   // If we're still here, the notification must be for a subchannel in
@@ -455,14 +441,13 @@ static void rr_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
   sd->curr_connectivity_state = sd->pending_connectivity_state_unsafe;
   // Update state counters and new overall state.
   update_state_counters_locked(sd);
-  update_lb_connectivity_status_locked(exec_ctx, sd, GRPC_ERROR_REF(error));
+  update_lb_connectivity_status_locked(sd, GRPC_ERROR_REF(error));
   // If the sd's new state is SHUTDOWN, unref the subchannel.
   if (sd->curr_connectivity_state == GRPC_CHANNEL_SHUTDOWN) {
-    grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
-    grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd,
-                                             "rr_connectivity_shutdown");
+    grpc_lb_subchannel_data_stop_connectivity_watch(sd);
+    grpc_lb_subchannel_data_unref_subchannel(sd, "rr_connectivity_shutdown");
     grpc_lb_subchannel_list_unref_for_connectivity_watch(
-        exec_ctx, sd->subchannel_list, "rr_connectivity_shutdown");
+        sd->subchannel_list, "rr_connectivity_shutdown");
   } else {  // sd not in SHUTDOWN
     if (sd->curr_connectivity_state == GRPC_CHANNEL_READY) {
       if (sd->connected_subchannel == nullptr) {
@@ -490,8 +475,8 @@ static void rr_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
         }
         if (p->subchannel_list != nullptr) {
           // dispose of the current subchannel_list
-          grpc_lb_subchannel_list_shutdown_and_unref(
-              exec_ctx, p->subchannel_list, "sl_phase_out_shutdown");
+          grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
+                                                     "sl_phase_out_shutdown");
         }
         p->subchannel_list = p->latest_pending_subchannel_list;
         p->latest_pending_subchannel_list = nullptr;
@@ -523,32 +508,31 @@ static void rr_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
                   (void*)p, (void*)selected->subchannel,
                   (void*)p->subchannel_list, (unsigned long)next_ready_index);
         }
-        GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete, GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(pp->on_complete, GRPC_ERROR_NONE);
         gpr_free(pp);
       }
     }
     // Renew notification.
-    grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
+    grpc_lb_subchannel_data_start_connectivity_watch(sd);
   }
 }
 
 static grpc_connectivity_state rr_check_connectivity_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol, grpc_error** error) {
+    grpc_lb_policy* pol, grpc_error** error) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
   return grpc_connectivity_state_get(&p->state_tracker, error);
 }
 
-static void rr_notify_on_state_change_locked(grpc_exec_ctx* exec_ctx,
-                                             grpc_lb_policy* pol,
+static void rr_notify_on_state_change_locked(grpc_lb_policy* pol,
                                              grpc_connectivity_state* current,
                                              grpc_closure* notify) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
-  grpc_connectivity_state_notify_on_state_change(exec_ctx, &p->state_tracker,
-                                                 current, notify);
+  grpc_connectivity_state_notify_on_state_change(&p->state_tracker, current,
+                                                 notify);
 }
 
-static void rr_ping_one_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
-                               grpc_closure* closure) {
+static void rr_ping_one_locked(grpc_lb_policy* pol, grpc_closure* on_initiate,
+                               grpc_closure* on_ack) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
   const size_t next_ready_index = get_next_ready_subchannel_index_locked(p);
   if (next_ready_index < p->subchannel_list->num_subchannels) {
@@ -556,16 +540,17 @@ static void rr_ping_one_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
         &p->subchannel_list->subchannels[next_ready_index];
     grpc_connected_subchannel* target = GRPC_CONNECTED_SUBCHANNEL_REF(
         selected->connected_subchannel, "rr_ping");
-    grpc_connected_subchannel_ping(exec_ctx, target, closure);
-    GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, target, "rr_ping");
+    grpc_connected_subchannel_ping(target, on_initiate, on_ack);
+    GRPC_CONNECTED_SUBCHANNEL_UNREF(target, "rr_ping");
   } else {
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, closure,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Round Robin not connected"));
+    GRPC_CLOSURE_SCHED(on_initiate, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                        "Round Robin not connected"));
+    GRPC_CLOSURE_SCHED(on_ack, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                   "Round Robin not connected"));
   }
 }
 
-static void rr_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+static void rr_update_locked(grpc_lb_policy* policy,
                              const grpc_lb_policy_args* args) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)policy;
   const grpc_arg* arg =
@@ -576,7 +561,7 @@ static void rr_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
     // Otherwise, keep using the current subchannel list (ignore this update).
     if (p->subchannel_list == nullptr) {
       grpc_connectivity_state_set(
-          exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+          &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Missing update in args"),
           "rr_update_missing");
     }
@@ -588,15 +573,15 @@ static void rr_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
             addresses->num_addresses);
   }
   grpc_lb_subchannel_list* subchannel_list = grpc_lb_subchannel_list_create(
-      exec_ctx, &p->base, &grpc_lb_round_robin_trace, addresses, args,
+      &p->base, &grpc_lb_round_robin_trace, addresses, args,
       rr_connectivity_changed_locked);
   if (subchannel_list->num_subchannels == 0) {
     grpc_connectivity_state_set(
-        exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+        &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Empty update"),
         "rr_update_empty");
     if (p->subchannel_list != nullptr) {
-      grpc_lb_subchannel_list_shutdown_and_unref(exec_ctx, p->subchannel_list,
+      grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
                                                  "sl_shutdown_empty_update");
     }
     p->subchannel_list = subchannel_list;  // empty list
@@ -612,7 +597,7 @@ static void rr_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
                 (void*)subchannel_list);
       }
       grpc_lb_subchannel_list_shutdown_and_unref(
-          exec_ctx, p->latest_pending_subchannel_list, "sl_outdated");
+          p->latest_pending_subchannel_list, "sl_outdated");
     }
     p->latest_pending_subchannel_list = subchannel_list;
     for (size_t i = 0; i < subchannel_list->num_subchannels; ++i) {
@@ -623,22 +608,21 @@ static void rr_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
       grpc_lb_subchannel_list_ref_for_connectivity_watch(subchannel_list,
                                                          "connectivity_watch");
       grpc_lb_subchannel_data_start_connectivity_watch(
-          exec_ctx, &subchannel_list->subchannels[i]);
+          &subchannel_list->subchannels[i]);
     }
   } else {
     // The policy isn't picking yet. Save the update for later, disposing of
     // previous version if any.
     if (p->subchannel_list != nullptr) {
       grpc_lb_subchannel_list_shutdown_and_unref(
-          exec_ctx, p->subchannel_list, "rr_update_before_started_picking");
+          p->subchannel_list, "rr_update_before_started_picking");
     }
     p->subchannel_list = subchannel_list;
   }
 }
 
 static void rr_set_reresolve_closure_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-    grpc_closure* request_reresolution) {
+    grpc_lb_policy* policy, grpc_closure* request_reresolution) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)policy;
   GPR_ASSERT(!p->shutdown);
   GPR_ASSERT(policy->request_reresolution == nullptr);
@@ -662,8 +646,7 @@ static void round_robin_factory_ref(grpc_lb_policy_factory* factory) {}
 
 static void round_robin_factory_unref(grpc_lb_policy_factory* factory) {}
 
-static grpc_lb_policy* round_robin_create(grpc_exec_ctx* exec_ctx,
-                                          grpc_lb_policy_factory* factory,
+static grpc_lb_policy* round_robin_create(grpc_lb_policy_factory* factory,
                                           grpc_lb_policy_args* args) {
   GPR_ASSERT(args->client_channel_factory != nullptr);
   round_robin_lb_policy* p = (round_robin_lb_policy*)gpr_zalloc(sizeof(*p));
@@ -671,7 +654,7 @@ static grpc_lb_policy* round_robin_create(grpc_exec_ctx* exec_ctx,
   grpc_subchannel_index_ref();
   grpc_connectivity_state_init(&p->state_tracker, GRPC_CHANNEL_IDLE,
                                "round_robin");
-  rr_update_locked(exec_ctx, &p->base, args);
+  rr_update_locked(&p->base, args);
   if (grpc_lb_round_robin_trace.enabled()) {
     gpr_log(GPR_DEBUG, "[RR %p] Created with %lu subchannels", (void*)p,
             (unsigned long)p->subchannel_list->num_subchannels);
diff --git a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc
index b6fce4d207..a3b4c8e524 100644
--- a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc
@@ -28,8 +28,7 @@
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "src/core/lib/transport/connectivity_state.h"
 
-void grpc_lb_subchannel_data_unref_subchannel(grpc_exec_ctx* exec_ctx,
-                                              grpc_lb_subchannel_data* sd,
+void grpc_lb_subchannel_data_unref_subchannel(grpc_lb_subchannel_data* sd,
                                               const char* reason) {
   if (sd->subchannel != nullptr) {
     if (sd->subchannel_list->tracer->enabled()) {
@@ -41,23 +40,22 @@ void grpc_lb_subchannel_data_unref_subchannel(grpc_exec_ctx* exec_ctx,
               (size_t)(sd - sd->subchannel_list->subchannels),
               sd->subchannel_list->num_subchannels, sd->subchannel);
     }
-    GRPC_SUBCHANNEL_UNREF(exec_ctx, sd->subchannel, reason);
+    GRPC_SUBCHANNEL_UNREF(sd->subchannel, reason);
     sd->subchannel = nullptr;
     if (sd->connected_subchannel != nullptr) {
-      GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, sd->connected_subchannel,
-                                      reason);
+      GRPC_CONNECTED_SUBCHANNEL_UNREF(sd->connected_subchannel, reason);
       sd->connected_subchannel = nullptr;
     }
     if (sd->user_data != nullptr) {
       GPR_ASSERT(sd->user_data_vtable != nullptr);
-      sd->user_data_vtable->destroy(exec_ctx, sd->user_data);
+      sd->user_data_vtable->destroy(sd->user_data);
       sd->user_data = nullptr;
     }
   }
 }
 
 void grpc_lb_subchannel_data_start_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_data* sd) {
+    grpc_lb_subchannel_data* sd) {
   if (sd->subchannel_list->tracer->enabled()) {
     gpr_log(GPR_DEBUG,
             "[%s %p] subchannel list %p index %" PRIuPTR " of %" PRIuPTR
@@ -69,13 +67,13 @@ void grpc_lb_subchannel_data_start_connectivity_watch(
   }
   sd->connectivity_notification_pending = true;
   grpc_subchannel_notify_on_state_change(
-      exec_ctx, sd->subchannel, sd->subchannel_list->policy->interested_parties,
+      sd->subchannel, sd->subchannel_list->policy->interested_parties,
       &sd->pending_connectivity_state_unsafe,
       &sd->connectivity_changed_closure);
 }
 
 void grpc_lb_subchannel_data_stop_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_data* sd) {
+    grpc_lb_subchannel_data* sd) {
   if (sd->subchannel_list->tracer->enabled()) {
     gpr_log(GPR_DEBUG,
             "[%s %p] subchannel list %p index %" PRIuPTR " of %" PRIuPTR
@@ -90,7 +88,7 @@ void grpc_lb_subchannel_data_stop_connectivity_watch(
 }
 
 grpc_lb_subchannel_list* grpc_lb_subchannel_list_create(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* p, grpc_core::TraceFlag* tracer,
+    grpc_lb_policy* p, grpc_core::TraceFlag* tracer,
     const grpc_lb_addresses* addresses, const grpc_lb_policy_args* args,
     grpc_iomgr_cb_func connectivity_changed_cb) {
   grpc_lb_subchannel_list* subchannel_list =
@@ -124,8 +122,8 @@ grpc_lb_subchannel_list* grpc_lb_subchannel_list_create(
     gpr_free(addr_arg.value.string);
     sc_args.args = new_args;
     grpc_subchannel* subchannel = grpc_client_channel_factory_create_subchannel(
-        exec_ctx, args->client_channel_factory, &sc_args);
-    grpc_channel_args_destroy(exec_ctx, new_args);
+        args->client_channel_factory, &sc_args);
+    grpc_channel_args_destroy(new_args);
     if (subchannel == nullptr) {
       // Subchannel could not be created.
       if (tracer->enabled()) {
@@ -172,8 +170,7 @@ grpc_lb_subchannel_list* grpc_lb_subchannel_list_create(
   return subchannel_list;
 }
 
-static void subchannel_list_destroy(grpc_exec_ctx* exec_ctx,
-                                    grpc_lb_subchannel_list* subchannel_list) {
+static void subchannel_list_destroy(grpc_lb_subchannel_list* subchannel_list) {
   if (subchannel_list->tracer->enabled()) {
     gpr_log(GPR_DEBUG, "[%s %p] Destroying subchannel_list %p",
             subchannel_list->tracer->name(), subchannel_list->policy,
@@ -181,8 +178,7 @@ static void subchannel_list_destroy(grpc_exec_ctx* exec_ctx,
   }
   for (size_t i = 0; i < subchannel_list->num_subchannels; i++) {
     grpc_lb_subchannel_data* sd = &subchannel_list->subchannels[i];
-    grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd,
-                                             "subchannel_list_destroy");
+    grpc_lb_subchannel_data_unref_subchannel(sd, "subchannel_list_destroy");
   }
   gpr_free(subchannel_list->subchannels);
   gpr_free(subchannel_list);
@@ -200,8 +196,7 @@ void grpc_lb_subchannel_list_ref(grpc_lb_subchannel_list* subchannel_list,
   }
 }
 
-void grpc_lb_subchannel_list_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_lb_subchannel_list* subchannel_list,
+void grpc_lb_subchannel_list_unref(grpc_lb_subchannel_list* subchannel_list,
                                    const char* reason) {
   const bool done = gpr_unref(&subchannel_list->refcount);
   if (subchannel_list->tracer->enabled()) {
@@ -212,7 +207,7 @@ void grpc_lb_subchannel_list_unref(grpc_exec_ctx* exec_ctx,
             reason);
   }
   if (done) {
-    subchannel_list_destroy(exec_ctx, subchannel_list);
+    subchannel_list_destroy(subchannel_list);
   }
 }
 
@@ -223,14 +218,13 @@ void grpc_lb_subchannel_list_ref_for_connectivity_watch(
 }
 
 void grpc_lb_subchannel_list_unref_for_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_list* subchannel_list,
-    const char* reason) {
-  GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, subchannel_list->policy, reason);
-  grpc_lb_subchannel_list_unref(exec_ctx, subchannel_list, reason);
+    grpc_lb_subchannel_list* subchannel_list, const char* reason) {
+  GRPC_LB_POLICY_WEAK_UNREF(subchannel_list->policy, reason);
+  grpc_lb_subchannel_list_unref(subchannel_list, reason);
 }
 
 static void subchannel_data_cancel_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_data* sd, const char* reason) {
+    grpc_lb_subchannel_data* sd, const char* reason) {
   if (sd->subchannel_list->tracer->enabled()) {
     gpr_log(GPR_DEBUG,
             "[%s %p] subchannel list %p index %" PRIuPTR " of %" PRIuPTR
@@ -240,14 +234,12 @@ static void subchannel_data_cancel_connectivity_watch(
             (size_t)(sd - sd->subchannel_list->subchannels),
             sd->subchannel_list->num_subchannels, sd->subchannel, reason);
   }
-  grpc_subchannel_notify_on_state_change(exec_ctx, sd->subchannel, nullptr,
-                                         nullptr,
+  grpc_subchannel_notify_on_state_change(sd->subchannel, nullptr, nullptr,
                                          &sd->connectivity_changed_closure);
 }
 
 void grpc_lb_subchannel_list_shutdown_and_unref(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_list* subchannel_list,
-    const char* reason) {
+    grpc_lb_subchannel_list* subchannel_list, const char* reason) {
   if (subchannel_list->tracer->enabled()) {
     gpr_log(GPR_DEBUG, "[%s %p] Shutting down subchannel_list %p (%s)",
             subchannel_list->tracer->name(), subchannel_list->policy,
@@ -261,10 +253,10 @@ void grpc_lb_subchannel_list_shutdown_and_unref(
     // the callback is responsible for unreffing the subchannel.
     // Otherwise, unref the subchannel directly.
     if (sd->connectivity_notification_pending) {
-      subchannel_data_cancel_connectivity_watch(exec_ctx, sd, reason);
+      subchannel_data_cancel_connectivity_watch(sd, reason);
     } else if (sd->subchannel != nullptr) {
-      grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd, reason);
+      grpc_lb_subchannel_data_unref_subchannel(sd, reason);
     }
   }
-  grpc_lb_subchannel_list_unref(exec_ctx, subchannel_list, reason);
+  grpc_lb_subchannel_list_unref(subchannel_list, reason);
 }
diff --git a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h
index e3e5eba56a..0f8cea9347 100644
--- a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h
+++ b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h
@@ -65,8 +65,7 @@ typedef struct {
 } grpc_lb_subchannel_data;
 
 /// Unrefs the subchannel contained in sd.
-void grpc_lb_subchannel_data_unref_subchannel(grpc_exec_ctx* exec_ctx,
-                                              grpc_lb_subchannel_data* sd,
+void grpc_lb_subchannel_data_unref_subchannel(grpc_lb_subchannel_data* sd,
                                               const char* reason);
 
 /// Starts watching the connectivity state of the subchannel.
@@ -74,11 +73,11 @@ void grpc_lb_subchannel_data_unref_subchannel(grpc_exec_ctx* exec_ctx,
 /// grpc_lb_subchannel_data_stop_connectivity_watch() or again call
 /// grpc_lb_subchannel_data_start_connectivity_watch().
 void grpc_lb_subchannel_data_start_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_data* sd);
+    grpc_lb_subchannel_data* sd);
 
 /// Stops watching the connectivity state of the subchannel.
 void grpc_lb_subchannel_data_stop_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_data* sd);
+    grpc_lb_subchannel_data* sd);
 
 struct grpc_lb_subchannel_list {
   /** backpointer to owning policy */
@@ -117,15 +116,14 @@ struct grpc_lb_subchannel_list {
 };
 
 grpc_lb_subchannel_list* grpc_lb_subchannel_list_create(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* p, grpc_core::TraceFlag* tracer,
+    grpc_lb_policy* p, grpc_core::TraceFlag* tracer,
     const grpc_lb_addresses* addresses, const grpc_lb_policy_args* args,
     grpc_iomgr_cb_func connectivity_changed_cb);
 
 void grpc_lb_subchannel_list_ref(grpc_lb_subchannel_list* subchannel_list,
                                  const char* reason);
 
-void grpc_lb_subchannel_list_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_lb_subchannel_list* subchannel_list,
+void grpc_lb_subchannel_list_unref(grpc_lb_subchannel_list* subchannel_list,
                                    const char* reason);
 
 /// Takes and releases refs needed for a connectivity notification.
@@ -133,13 +131,11 @@ void grpc_lb_subchannel_list_unref(grpc_exec_ctx* exec_ctx,
 void grpc_lb_subchannel_list_ref_for_connectivity_watch(
     grpc_lb_subchannel_list* subchannel_list, const char* reason);
 void grpc_lb_subchannel_list_unref_for_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_list* subchannel_list,
-    const char* reason);
+    grpc_lb_subchannel_list* subchannel_list, const char* reason);
 
 /// Mark subchannel_list as discarded. Unsubscribes all its subchannels. The
 /// connectivity state notification callback will ultimately unref it.
 void grpc_lb_subchannel_list_shutdown_and_unref(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_list* subchannel_list,
-    const char* reason);
+    grpc_lb_subchannel_list* subchannel_list, const char* reason);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_SUBCHANNEL_LIST_H */
diff --git a/src/core/ext/filters/client_channel/lb_policy_factory.cc b/src/core/ext/filters/client_channel/lb_policy_factory.cc
index d43f9fd1b9..dbf69fdcba 100644
--- a/src/core/ext/filters/client_channel/lb_policy_factory.cc
+++ b/src/core/ext/filters/client_channel/lb_policy_factory.cc
@@ -112,13 +112,11 @@ int grpc_lb_addresses_cmp(const grpc_lb_addresses* addresses1,
   return 0;
 }
 
-void grpc_lb_addresses_destroy(grpc_exec_ctx* exec_ctx,
-                               grpc_lb_addresses* addresses) {
+void grpc_lb_addresses_destroy(grpc_lb_addresses* addresses) {
   for (size_t i = 0; i < addresses->num_addresses; ++i) {
     gpr_free(addresses->addresses[i].balancer_name);
     if (addresses->addresses[i].user_data != nullptr) {
-      addresses->user_data_vtable->destroy(exec_ctx,
-                                           addresses->addresses[i].user_data);
+      addresses->user_data_vtable->destroy(addresses->addresses[i].user_data);
     }
   }
   gpr_free(addresses->addresses);
@@ -128,8 +126,8 @@ void grpc_lb_addresses_destroy(grpc_exec_ctx* exec_ctx,
 static void* lb_addresses_copy(void* addresses) {
   return grpc_lb_addresses_copy((grpc_lb_addresses*)addresses);
 }
-static void lb_addresses_destroy(grpc_exec_ctx* exec_ctx, void* addresses) {
-  grpc_lb_addresses_destroy(exec_ctx, (grpc_lb_addresses*)addresses);
+static void lb_addresses_destroy(void* addresses) {
+  grpc_lb_addresses_destroy((grpc_lb_addresses*)addresses);
 }
 static int lb_addresses_cmp(void* addresses1, void* addresses2) {
   return grpc_lb_addresses_cmp((grpc_lb_addresses*)addresses1,
@@ -162,8 +160,7 @@ void grpc_lb_policy_factory_unref(grpc_lb_policy_factory* factory) {
 }
 
 grpc_lb_policy* grpc_lb_policy_factory_create_lb_policy(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy_factory* factory,
-    grpc_lb_policy_args* args) {
+    grpc_lb_policy_factory* factory, grpc_lb_policy_args* args) {
   if (factory == nullptr) return nullptr;
-  return factory->vtable->create_lb_policy(exec_ctx, factory, args);
+  return factory->vtable->create_lb_policy(factory, args);
 }
diff --git a/src/core/ext/filters/client_channel/lb_policy_factory.h b/src/core/ext/filters/client_channel/lb_policy_factory.h
index 8f6d8c1b08..9da231b657 100644
--- a/src/core/ext/filters/client_channel/lb_policy_factory.h
+++ b/src/core/ext/filters/client_channel/lb_policy_factory.h
@@ -50,7 +50,7 @@ typedef struct grpc_lb_address {
 
 typedef struct grpc_lb_user_data_vtable {
   void* (*copy)(void*);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, void*);
+  void (*destroy)(void*);
   int (*cmp)(void*, void*);
 } grpc_lb_user_data_vtable;
 
@@ -91,8 +91,7 @@ int grpc_lb_addresses_cmp(const grpc_lb_addresses* addresses1,
                           const grpc_lb_addresses* addresses2);
 
 /** Destroys \a addresses. */
-void grpc_lb_addresses_destroy(grpc_exec_ctx* exec_ctx,
-                               grpc_lb_addresses* addresses);
+void grpc_lb_addresses_destroy(grpc_lb_addresses* addresses);
 
 /** Returns a channel arg containing \a addresses. */
 grpc_arg grpc_lb_addresses_create_channel_arg(
@@ -114,8 +113,7 @@ struct grpc_lb_policy_factory_vtable {
   void (*unref)(grpc_lb_policy_factory* factory);
 
   /** Implementation of grpc_lb_policy_factory_create_lb_policy */
-  grpc_lb_policy* (*create_lb_policy)(grpc_exec_ctx* exec_ctx,
-                                      grpc_lb_policy_factory* factory,
+  grpc_lb_policy* (*create_lb_policy)(grpc_lb_policy_factory* factory,
                                       grpc_lb_policy_args* args);
 
   /** Name for the LB policy this factory implements */
@@ -127,7 +125,6 @@ void grpc_lb_policy_factory_unref(grpc_lb_policy_factory* factory);
 
 /** Create a lb_policy instance. */
 grpc_lb_policy* grpc_lb_policy_factory_create_lb_policy(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy_factory* factory,
-    grpc_lb_policy_args* args);
+    grpc_lb_policy_factory* factory, grpc_lb_policy_args* args);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_FACTORY_H */
diff --git a/src/core/ext/filters/client_channel/lb_policy_registry.cc b/src/core/ext/filters/client_channel/lb_policy_registry.cc
index 6e710e86d9..edd0330c6a 100644
--- a/src/core/ext/filters/client_channel/lb_policy_registry.cc
+++ b/src/core/ext/filters/client_channel/lb_policy_registry.cc
@@ -61,10 +61,10 @@ static grpc_lb_policy_factory* lookup_factory(const char* name) {
   return nullptr;
 }
 
-grpc_lb_policy* grpc_lb_policy_create(grpc_exec_ctx* exec_ctx, const char* name,
+grpc_lb_policy* grpc_lb_policy_create(const char* name,
                                       grpc_lb_policy_args* args) {
   grpc_lb_policy_factory* factory = lookup_factory(name);
   grpc_lb_policy* lb_policy =
-      grpc_lb_policy_factory_create_lb_policy(exec_ctx, factory, args);
+      grpc_lb_policy_factory_create_lb_policy(factory, args);
   return lb_policy;
 }
diff --git a/src/core/ext/filters/client_channel/lb_policy_registry.h b/src/core/ext/filters/client_channel/lb_policy_registry.h
index acddc90fdd..5aff79376b 100644
--- a/src/core/ext/filters/client_channel/lb_policy_registry.h
+++ b/src/core/ext/filters/client_channel/lb_policy_registry.h
@@ -34,7 +34,7 @@ void grpc_register_lb_policy(grpc_lb_policy_factory* factory);
  *
  * If \a name is NULL, the default factory from \a grpc_lb_policy_registry_init
  * will be returned. */
-grpc_lb_policy* grpc_lb_policy_create(grpc_exec_ctx* exec_ctx, const char* name,
+grpc_lb_policy* grpc_lb_policy_create(const char* name,
                                       grpc_lb_policy_args* args);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_REGISTRY_H */
diff --git a/src/core/ext/filters/client_channel/proxy_mapper.cc b/src/core/ext/filters/client_channel/proxy_mapper.cc
index c6ea5fc680..be85cfcced 100644
--- a/src/core/ext/filters/client_channel/proxy_mapper.cc
+++ b/src/core/ext/filters/client_channel/proxy_mapper.cc
@@ -23,24 +23,22 @@ void grpc_proxy_mapper_init(const grpc_proxy_mapper_vtable* vtable,
   mapper->vtable = vtable;
 }
 
-bool grpc_proxy_mapper_map_name(grpc_exec_ctx* exec_ctx,
-                                grpc_proxy_mapper* mapper,
+bool grpc_proxy_mapper_map_name(grpc_proxy_mapper* mapper,
                                 const char* server_uri,
                                 const grpc_channel_args* args,
                                 char** name_to_resolve,
                                 grpc_channel_args** new_args) {
-  return mapper->vtable->map_name(exec_ctx, mapper, server_uri, args,
-                                  name_to_resolve, new_args);
+  return mapper->vtable->map_name(mapper, server_uri, args, name_to_resolve,
+                                  new_args);
 }
 
-bool grpc_proxy_mapper_map_address(grpc_exec_ctx* exec_ctx,
-                                   grpc_proxy_mapper* mapper,
+bool grpc_proxy_mapper_map_address(grpc_proxy_mapper* mapper,
                                    const grpc_resolved_address* address,
                                    const grpc_channel_args* args,
                                    grpc_resolved_address** new_address,
                                    grpc_channel_args** new_args) {
-  return mapper->vtable->map_address(exec_ctx, mapper, address, args,
-                                     new_address, new_args);
+  return mapper->vtable->map_address(mapper, address, args, new_address,
+                                     new_args);
 }
 
 void grpc_proxy_mapper_destroy(grpc_proxy_mapper* mapper) {
diff --git a/src/core/ext/filters/client_channel/proxy_mapper.h b/src/core/ext/filters/client_channel/proxy_mapper.h
index a13861ccaf..ce3e65ee46 100644
--- a/src/core/ext/filters/client_channel/proxy_mapper.h
+++ b/src/core/ext/filters/client_channel/proxy_mapper.h
@@ -32,14 +32,14 @@ typedef struct {
   /// If no proxy is needed, returns false.
   /// Otherwise, sets \a name_to_resolve, optionally sets \a new_args,
   /// and returns true.
-  bool (*map_name)(grpc_exec_ctx* exec_ctx, grpc_proxy_mapper* mapper,
-                   const char* server_uri, const grpc_channel_args* args,
-                   char** name_to_resolve, grpc_channel_args** new_args);
+  bool (*map_name)(grpc_proxy_mapper* mapper, const char* server_uri,
+                   const grpc_channel_args* args, char** name_to_resolve,
+                   grpc_channel_args** new_args);
   /// Determines the proxy address to use to contact \a address.
   /// If no proxy is needed, returns false.
   /// Otherwise, sets \a new_address, optionally sets \a new_args, and
   /// returns true.
-  bool (*map_address)(grpc_exec_ctx* exec_ctx, grpc_proxy_mapper* mapper,
+  bool (*map_address)(grpc_proxy_mapper* mapper,
                       const grpc_resolved_address* address,
                       const grpc_channel_args* args,
                       grpc_resolved_address** new_address,
@@ -55,15 +55,13 @@ struct grpc_proxy_mapper {
 void grpc_proxy_mapper_init(const grpc_proxy_mapper_vtable* vtable,
                             grpc_proxy_mapper* mapper);
 
-bool grpc_proxy_mapper_map_name(grpc_exec_ctx* exec_ctx,
-                                grpc_proxy_mapper* mapper,
+bool grpc_proxy_mapper_map_name(grpc_proxy_mapper* mapper,
                                 const char* server_uri,
                                 const grpc_channel_args* args,
                                 char** name_to_resolve,
                                 grpc_channel_args** new_args);
 
-bool grpc_proxy_mapper_map_address(grpc_exec_ctx* exec_ctx,
-                                   grpc_proxy_mapper* mapper,
+bool grpc_proxy_mapper_map_address(grpc_proxy_mapper* mapper,
                                    const grpc_resolved_address* address,
                                    const grpc_channel_args* args,
                                    grpc_resolved_address** new_address,
diff --git a/src/core/ext/filters/client_channel/proxy_mapper_registry.cc b/src/core/ext/filters/client_channel/proxy_mapper_registry.cc
index 09967eea3c..51778a20cc 100644
--- a/src/core/ext/filters/client_channel/proxy_mapper_registry.cc
+++ b/src/core/ext/filters/client_channel/proxy_mapper_registry.cc
@@ -46,14 +46,13 @@ static void grpc_proxy_mapper_list_register(grpc_proxy_mapper_list* list,
   ++list->num_mappers;
 }
 
-static bool grpc_proxy_mapper_list_map_name(grpc_exec_ctx* exec_ctx,
-                                            grpc_proxy_mapper_list* list,
+static bool grpc_proxy_mapper_list_map_name(grpc_proxy_mapper_list* list,
                                             const char* server_uri,
                                             const grpc_channel_args* args,
                                             char** name_to_resolve,
                                             grpc_channel_args** new_args) {
   for (size_t i = 0; i < list->num_mappers; ++i) {
-    if (grpc_proxy_mapper_map_name(exec_ctx, list->list[i], server_uri, args,
+    if (grpc_proxy_mapper_map_name(list->list[i], server_uri, args,
                                    name_to_resolve, new_args)) {
       return true;
     }
@@ -62,12 +61,12 @@ static bool grpc_proxy_mapper_list_map_name(grpc_exec_ctx* exec_ctx,
 }
 
 static bool grpc_proxy_mapper_list_map_address(
-    grpc_exec_ctx* exec_ctx, grpc_proxy_mapper_list* list,
-    const grpc_resolved_address* address, const grpc_channel_args* args,
-    grpc_resolved_address** new_address, grpc_channel_args** new_args) {
+    grpc_proxy_mapper_list* list, const grpc_resolved_address* address,
+    const grpc_channel_args* args, grpc_resolved_address** new_address,
+    grpc_channel_args** new_args) {
   for (size_t i = 0; i < list->num_mappers; ++i) {
-    if (grpc_proxy_mapper_map_address(exec_ctx, list->list[i], address, args,
-                                      new_address, new_args)) {
+    if (grpc_proxy_mapper_map_address(list->list[i], address, args, new_address,
+                                      new_args)) {
       return true;
     }
   }
@@ -105,20 +104,17 @@ void grpc_proxy_mapper_register(bool at_start, grpc_proxy_mapper* mapper) {
   grpc_proxy_mapper_list_register(&g_proxy_mapper_list, at_start, mapper);
 }
 
-bool grpc_proxy_mappers_map_name(grpc_exec_ctx* exec_ctx,
-                                 const char* server_uri,
+bool grpc_proxy_mappers_map_name(const char* server_uri,
                                  const grpc_channel_args* args,
                                  char** name_to_resolve,
                                  grpc_channel_args** new_args) {
-  return grpc_proxy_mapper_list_map_name(exec_ctx, &g_proxy_mapper_list,
-                                         server_uri, args, name_to_resolve,
-                                         new_args);
+  return grpc_proxy_mapper_list_map_name(&g_proxy_mapper_list, server_uri, args,
+                                         name_to_resolve, new_args);
 }
-bool grpc_proxy_mappers_map_address(grpc_exec_ctx* exec_ctx,
-                                    const grpc_resolved_address* address,
+bool grpc_proxy_mappers_map_address(const grpc_resolved_address* address,
                                     const grpc_channel_args* args,
                                     grpc_resolved_address** new_address,
                                     grpc_channel_args** new_args) {
-  return grpc_proxy_mapper_list_map_address(
-      exec_ctx, &g_proxy_mapper_list, address, args, new_address, new_args);
+  return grpc_proxy_mapper_list_map_address(&g_proxy_mapper_list, address, args,
+                                            new_address, new_args);
 }
diff --git a/src/core/ext/filters/client_channel/proxy_mapper_registry.h b/src/core/ext/filters/client_channel/proxy_mapper_registry.h
index 99e54d1a78..2ad6c04e1d 100644
--- a/src/core/ext/filters/client_channel/proxy_mapper_registry.h
+++ b/src/core/ext/filters/client_channel/proxy_mapper_registry.h
@@ -29,14 +29,12 @@ void grpc_proxy_mapper_registry_shutdown();
 /// the list.  Otherwise, it will be added to the end.
 void grpc_proxy_mapper_register(bool at_start, grpc_proxy_mapper* mapper);
 
-bool grpc_proxy_mappers_map_name(grpc_exec_ctx* exec_ctx,
-                                 const char* server_uri,
+bool grpc_proxy_mappers_map_name(const char* server_uri,
                                  const grpc_channel_args* args,
                                  char** name_to_resolve,
                                  grpc_channel_args** new_args);
 
-bool grpc_proxy_mappers_map_address(grpc_exec_ctx* exec_ctx,
-                                    const grpc_resolved_address* address,
+bool grpc_proxy_mappers_map_address(const grpc_resolved_address* address,
                                     const grpc_channel_args* args,
                                     grpc_resolved_address** new_address,
                                     grpc_channel_args** new_args);
diff --git a/src/core/ext/filters/client_channel/resolver.cc b/src/core/ext/filters/client_channel/resolver.cc
index c16b1515c7..ff54e7179d 100644
--- a/src/core/ext/filters/client_channel/resolver.cc
+++ b/src/core/ext/filters/client_channel/resolver.cc
@@ -46,8 +46,8 @@ void grpc_resolver_ref(grpc_resolver* resolver) {
 }
 
 #ifndef NDEBUG
-void grpc_resolver_unref(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver,
-                         const char* file, int line, const char* reason) {
+void grpc_resolver_unref(grpc_resolver* resolver, const char* file, int line,
+                         const char* reason) {
   if (grpc_trace_resolver_refcount.enabled()) {
     gpr_atm old_refs = gpr_atm_no_barrier_load(&resolver->refs.count);
     gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
@@ -55,27 +55,25 @@ void grpc_resolver_unref(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver,
             old_refs, old_refs - 1, reason);
   }
 #else
-void grpc_resolver_unref(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver) {
+void grpc_resolver_unref(grpc_resolver* resolver) {
 #endif
   if (gpr_unref(&resolver->refs)) {
     grpc_combiner* combiner = resolver->combiner;
-    resolver->vtable->destroy(exec_ctx, resolver);
-    GRPC_COMBINER_UNREF(exec_ctx, combiner, "resolver");
+    resolver->vtable->destroy(resolver);
+    GRPC_COMBINER_UNREF(combiner, "resolver");
   }
 }
 
-void grpc_resolver_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_resolver* resolver) {
-  resolver->vtable->shutdown_locked(exec_ctx, resolver);
+void grpc_resolver_shutdown_locked(grpc_resolver* resolver) {
+  resolver->vtable->shutdown_locked(resolver);
 }
 
-void grpc_resolver_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                            grpc_resolver* resolver) {
-  resolver->vtable->channel_saw_error_locked(exec_ctx, resolver);
+void grpc_resolver_channel_saw_error_locked(grpc_resolver* resolver) {
+  resolver->vtable->channel_saw_error_locked(resolver);
 }
 
-void grpc_resolver_next_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver,
+void grpc_resolver_next_locked(grpc_resolver* resolver,
                                grpc_channel_args** result,
                                grpc_closure* on_complete) {
-  resolver->vtable->next_locked(exec_ctx, resolver, result, on_complete);
+  resolver->vtable->next_locked(resolver, result, on_complete);
 }
diff --git a/src/core/ext/filters/client_channel/resolver.h b/src/core/ext/filters/client_channel/resolver.h
index 4e8cfbe417..f6a4af01d6 100644
--- a/src/core/ext/filters/client_channel/resolver.h
+++ b/src/core/ext/filters/client_channel/resolver.h
@@ -35,43 +35,40 @@ struct grpc_resolver {
 };
 
 struct grpc_resolver_vtable {
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver);
-  void (*shutdown_locked)(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver);
-  void (*channel_saw_error_locked)(grpc_exec_ctx* exec_ctx,
-                                   grpc_resolver* resolver);
-  void (*next_locked)(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver,
-                      grpc_channel_args** result, grpc_closure* on_complete);
+  void (*destroy)(grpc_resolver* resolver);
+  void (*shutdown_locked)(grpc_resolver* resolver);
+  void (*channel_saw_error_locked)(grpc_resolver* resolver);
+  void (*next_locked)(grpc_resolver* resolver, grpc_channel_args** result,
+                      grpc_closure* on_complete);
 };
 
 #ifndef NDEBUG
 #define GRPC_RESOLVER_REF(p, r) grpc_resolver_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_RESOLVER_UNREF(e, p, r) \
-  grpc_resolver_unref((e), (p), __FILE__, __LINE__, (r))
+#define GRPC_RESOLVER_UNREF(p, r) \
+  grpc_resolver_unref((p), __FILE__, __LINE__, (r))
 void grpc_resolver_ref(grpc_resolver* policy, const char* file, int line,
                        const char* reason);
-void grpc_resolver_unref(grpc_exec_ctx* exec_ctx, grpc_resolver* policy,
-                         const char* file, int line, const char* reason);
+void grpc_resolver_unref(grpc_resolver* policy, const char* file, int line,
+                         const char* reason);
 #else
 #define GRPC_RESOLVER_REF(p, r) grpc_resolver_ref((p))
-#define GRPC_RESOLVER_UNREF(e, p, r) grpc_resolver_unref((e), (p))
+#define GRPC_RESOLVER_UNREF(p, r) grpc_resolver_unref((p))
 void grpc_resolver_ref(grpc_resolver* policy);
-void grpc_resolver_unref(grpc_exec_ctx* exec_ctx, grpc_resolver* policy);
+void grpc_resolver_unref(grpc_resolver* policy);
 #endif
 
 void grpc_resolver_init(grpc_resolver* resolver,
                         const grpc_resolver_vtable* vtable,
                         grpc_combiner* combiner);
 
-void grpc_resolver_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_resolver* resolver);
+void grpc_resolver_shutdown_locked(grpc_resolver* resolver);
 
 /** Notification that the channel has seen an error on some address.
     Can be used as a hint that re-resolution is desirable soon.
 
     Must be called from the combiner passed as a resolver_arg at construction
     time.*/
-void grpc_resolver_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                            grpc_resolver* resolver);
+void grpc_resolver_channel_saw_error_locked(grpc_resolver* resolver);
 
 /** Get the next result from the resolver.  Expected to set \a *result with
     new channel args and then schedule \a on_complete for execution.
@@ -81,7 +78,7 @@ void grpc_resolver_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
 
     Must be called from the combiner passed as a resolver_arg at construction
     time.*/
-void grpc_resolver_next_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver,
+void grpc_resolver_next_locked(grpc_resolver* resolver,
                                grpc_channel_args** result,
                                grpc_closure* on_complete);
 
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc b/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc
index 543f5cf343..4659a5f3ed 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc
@@ -97,17 +97,14 @@ typedef struct {
   char* service_config_json;
 } ares_dns_resolver;
 
-static void dns_ares_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* r);
+static void dns_ares_destroy(grpc_resolver* r);
 
-static void dns_ares_start_resolving_locked(grpc_exec_ctx* exec_ctx,
-                                            ares_dns_resolver* r);
-static void dns_ares_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                              ares_dns_resolver* r);
+static void dns_ares_start_resolving_locked(ares_dns_resolver* r);
+static void dns_ares_maybe_finish_next_locked(ares_dns_resolver* r);
 
-static void dns_ares_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* r);
-static void dns_ares_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                              grpc_resolver* r);
-static void dns_ares_next_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* r,
+static void dns_ares_shutdown_locked(grpc_resolver* r);
+static void dns_ares_channel_saw_error_locked(grpc_resolver* r);
+static void dns_ares_next_locked(grpc_resolver* r,
                                  grpc_channel_args** target_result,
                                  grpc_closure* on_complete);
 
@@ -115,43 +112,39 @@ static const grpc_resolver_vtable dns_ares_resolver_vtable = {
     dns_ares_destroy, dns_ares_shutdown_locked,
     dns_ares_channel_saw_error_locked, dns_ares_next_locked};
 
-static void dns_ares_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_resolver* resolver) {
+static void dns_ares_shutdown_locked(grpc_resolver* resolver) {
   ares_dns_resolver* r = (ares_dns_resolver*)resolver;
   if (r->have_retry_timer) {
-    grpc_timer_cancel(exec_ctx, &r->retry_timer);
+    grpc_timer_cancel(&r->retry_timer);
   }
   if (r->pending_request != nullptr) {
-    grpc_cancel_ares_request(exec_ctx, r->pending_request);
+    grpc_cancel_ares_request(r->pending_request);
   }
   if (r->next_completion != nullptr) {
     *r->target_result = nullptr;
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, r->next_completion,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Resolver Shutdown"));
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                               "Resolver Shutdown"));
     r->next_completion = nullptr;
   }
 }
 
-static void dns_ares_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                              grpc_resolver* resolver) {
+static void dns_ares_channel_saw_error_locked(grpc_resolver* resolver) {
   ares_dns_resolver* r = (ares_dns_resolver*)resolver;
   if (!r->resolving) {
     r->backoff->Reset();
-    dns_ares_start_resolving_locked(exec_ctx, r);
+    dns_ares_start_resolving_locked(r);
   }
 }
 
-static void dns_ares_on_retry_timer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void dns_ares_on_retry_timer_locked(void* arg, grpc_error* error) {
   ares_dns_resolver* r = (ares_dns_resolver*)arg;
   r->have_retry_timer = false;
   if (error == GRPC_ERROR_NONE) {
     if (!r->resolving) {
-      dns_ares_start_resolving_locked(exec_ctx, r);
+      dns_ares_start_resolving_locked(r);
     }
   }
-  GRPC_RESOLVER_UNREF(exec_ctx, &r->base, "retry-timer");
+  GRPC_RESOLVER_UNREF(&r->base, "retry-timer");
 }
 
 static bool value_in_json_array(grpc_json* array, const char* value) {
@@ -226,8 +219,7 @@ static char* choose_service_config(char* service_config_choice_json) {
   return service_config;
 }
 
-static void dns_ares_on_resolved_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void dns_ares_on_resolved_locked(void* arg, grpc_error* error) {
   ares_dns_resolver* r = (ares_dns_resolver*)arg;
   grpc_channel_args* result = nullptr;
   GPR_ASSERT(r->resolving);
@@ -268,12 +260,12 @@ static void dns_ares_on_resolved_locked(grpc_exec_ctx* exec_ctx, void* arg,
         num_args_to_add);
     if (service_config != nullptr) grpc_service_config_destroy(service_config);
     gpr_free(service_config_string);
-    grpc_lb_addresses_destroy(exec_ctx, r->lb_addresses);
+    grpc_lb_addresses_destroy(r->lb_addresses);
   } else {
     const char* msg = grpc_error_string(error);
     gpr_log(GPR_DEBUG, "dns resolution failed: %s", msg);
-    grpc_millis next_try = r->backoff->Step(exec_ctx);
-    grpc_millis timeout = next_try - grpc_exec_ctx_now(exec_ctx);
+    grpc_millis next_try = r->backoff->Step();
+    grpc_millis timeout = next_try - grpc_core::ExecCtx::Get()->Now();
     gpr_log(GPR_INFO, "dns resolution failed (will retry): %s",
             grpc_error_string(error));
     GPR_ASSERT(!r->have_retry_timer);
@@ -284,20 +276,19 @@ static void dns_ares_on_resolved_locked(grpc_exec_ctx* exec_ctx, void* arg,
     } else {
       gpr_log(GPR_DEBUG, "retrying immediately");
     }
-    grpc_timer_init(exec_ctx, &r->retry_timer, next_try,
+    grpc_timer_init(&r->retry_timer, next_try,
                     &r->dns_ares_on_retry_timer_locked);
   }
   if (r->resolved_result != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, r->resolved_result);
+    grpc_channel_args_destroy(r->resolved_result);
   }
   r->resolved_result = result;
   r->resolved_version++;
-  dns_ares_maybe_finish_next_locked(exec_ctx, r);
-  GRPC_RESOLVER_UNREF(exec_ctx, &r->base, "dns-resolving");
+  dns_ares_maybe_finish_next_locked(r);
+  GRPC_RESOLVER_UNREF(&r->base, "dns-resolving");
 }
 
-static void dns_ares_next_locked(grpc_exec_ctx* exec_ctx,
-                                 grpc_resolver* resolver,
+static void dns_ares_next_locked(grpc_resolver* resolver,
                                  grpc_channel_args** target_result,
                                  grpc_closure* on_complete) {
   gpr_log(GPR_DEBUG, "dns_ares_next is called.");
@@ -307,56 +298,53 @@ static void dns_ares_next_locked(grpc_exec_ctx* exec_ctx,
   r->target_result = target_result;
   if (r->resolved_version == 0 && !r->resolving) {
     r->backoff->Reset();
-    dns_ares_start_resolving_locked(exec_ctx, r);
+    dns_ares_start_resolving_locked(r);
   } else {
-    dns_ares_maybe_finish_next_locked(exec_ctx, r);
+    dns_ares_maybe_finish_next_locked(r);
   }
 }
 
-static void dns_ares_start_resolving_locked(grpc_exec_ctx* exec_ctx,
-                                            ares_dns_resolver* r) {
+static void dns_ares_start_resolving_locked(ares_dns_resolver* r) {
   GRPC_RESOLVER_REF(&r->base, "dns-resolving");
   GPR_ASSERT(!r->resolving);
   r->resolving = true;
   r->lb_addresses = nullptr;
   r->service_config_json = nullptr;
   r->pending_request = grpc_dns_lookup_ares(
-      exec_ctx, r->dns_server, r->name_to_resolve, r->default_port,
-      r->interested_parties, &r->dns_ares_on_resolved_locked, &r->lb_addresses,
+      r->dns_server, r->name_to_resolve, r->default_port, r->interested_parties,
+      &r->dns_ares_on_resolved_locked, &r->lb_addresses,
       true /* check_grpclb */,
       r->request_service_config ? &r->service_config_json : nullptr);
 }
 
-static void dns_ares_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                              ares_dns_resolver* r) {
+static void dns_ares_maybe_finish_next_locked(ares_dns_resolver* r) {
   if (r->next_completion != nullptr &&
       r->resolved_version != r->published_version) {
     *r->target_result = r->resolved_result == nullptr
                             ? nullptr
                             : grpc_channel_args_copy(r->resolved_result);
     gpr_log(GPR_DEBUG, "dns_ares_maybe_finish_next_locked");
-    GRPC_CLOSURE_SCHED(exec_ctx, r->next_completion, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_NONE);
     r->next_completion = nullptr;
     r->published_version = r->resolved_version;
   }
 }
 
-static void dns_ares_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* gr) {
+static void dns_ares_destroy(grpc_resolver* gr) {
   gpr_log(GPR_DEBUG, "dns_ares_destroy");
   ares_dns_resolver* r = (ares_dns_resolver*)gr;
   if (r->resolved_result != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, r->resolved_result);
+    grpc_channel_args_destroy(r->resolved_result);
   }
-  grpc_pollset_set_destroy(exec_ctx, r->interested_parties);
+  grpc_pollset_set_destroy(r->interested_parties);
   gpr_free(r->dns_server);
   gpr_free(r->name_to_resolve);
   gpr_free(r->default_port);
-  grpc_channel_args_destroy(exec_ctx, r->channel_args);
+  grpc_channel_args_destroy(r->channel_args);
   gpr_free(r);
 }
 
-static grpc_resolver* dns_ares_create(grpc_exec_ctx* exec_ctx,
-                                      grpc_resolver_args* args,
+static grpc_resolver* dns_ares_create(grpc_resolver_args* args,
                                       const char* default_port) {
   /* Get name from args. */
   const char* path = args->uri->path;
@@ -377,8 +365,7 @@ static grpc_resolver* dns_ares_create(grpc_exec_ctx* exec_ctx,
       arg, (grpc_integer_options){false, false, true});
   r->interested_parties = grpc_pollset_set_create();
   if (args->pollset_set != nullptr) {
-    grpc_pollset_set_add_pollset_set(exec_ctx, r->interested_parties,
-                                     args->pollset_set);
+    grpc_pollset_set_add_pollset_set(r->interested_parties, args->pollset_set);
   }
   grpc_core::BackOff::Options backoff_options;
   backoff_options
@@ -405,9 +392,8 @@ static void dns_ares_factory_ref(grpc_resolver_factory* factory) {}
 static void dns_ares_factory_unref(grpc_resolver_factory* factory) {}
 
 static grpc_resolver* dns_factory_create_resolver(
-    grpc_exec_ctx* exec_ctx, grpc_resolver_factory* factory,
-    grpc_resolver_args* args) {
-  return dns_ares_create(exec_ctx, args, "https");
+    grpc_resolver_factory* factory, grpc_resolver_args* args) {
+  return dns_ares_create(args, "https");
 }
 
 static char* dns_ares_factory_get_default_host_name(
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h
index 03ea36bfcc..ba7dad63cf 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h
@@ -28,8 +28,7 @@ typedef struct grpc_ares_ev_driver grpc_ares_ev_driver;
 /* Start \a ev_driver. It will keep working until all IO on its ares_channel is
    done, or grpc_ares_ev_driver_destroy() is called. It may notify the callbacks
    bound to its ares_channel when necessary. */
-void grpc_ares_ev_driver_start(grpc_exec_ctx* exec_ctx,
-                               grpc_ares_ev_driver* ev_driver);
+void grpc_ares_ev_driver_start(grpc_ares_ev_driver* ev_driver);
 
 /* Returns the ares_channel owned by \a ev_driver. To bind a c-ares query to
    \a ev_driver, use the ares_channel owned by \a ev_driver as the arg of the
@@ -47,8 +46,7 @@ grpc_error* grpc_ares_ev_driver_create(grpc_ares_ev_driver** ev_driver,
 void grpc_ares_ev_driver_destroy(grpc_ares_ev_driver* ev_driver);
 
 /* Shutdown all the grpc_fds used by \a ev_driver */
-void grpc_ares_ev_driver_shutdown(grpc_exec_ctx* exec_ctx,
-                                  grpc_ares_ev_driver* ev_driver);
+void grpc_ares_ev_driver_shutdown(grpc_ares_ev_driver* ev_driver);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_RESOLVER_DNS_C_ARES_GRPC_ARES_EV_DRIVER_H \
         */
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
index 4cb068a41d..40e264504c 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
@@ -77,8 +77,7 @@ struct grpc_ares_ev_driver {
   bool shutting_down;
 };
 
-static void grpc_ares_notify_on_event_locked(grpc_exec_ctx* exec_ctx,
-                                             grpc_ares_ev_driver* ev_driver);
+static void grpc_ares_notify_on_event_locked(grpc_ares_ev_driver* ev_driver);
 
 static grpc_ares_ev_driver* grpc_ares_ev_driver_ref(
     grpc_ares_ev_driver* ev_driver) {
@@ -98,7 +97,7 @@ static void grpc_ares_ev_driver_unref(grpc_ares_ev_driver* ev_driver) {
   }
 }
 
-static void fd_node_destroy(grpc_exec_ctx* exec_ctx, fd_node* fdn) {
+static void fd_node_destroy(fd_node* fdn) {
   gpr_log(GPR_DEBUG, "delete fd: %d", grpc_fd_wrapped_fd(fdn->fd));
   GPR_ASSERT(!fdn->readable_registered);
   GPR_ASSERT(!fdn->writable_registered);
@@ -106,21 +105,20 @@ static void fd_node_destroy(grpc_exec_ctx* exec_ctx, fd_node* fdn) {
   /* c-ares library has closed the fd inside grpc_fd. This fd may be picked up
      immediately by another thread, and should not be closed by the following
      grpc_fd_orphan. */
-  grpc_fd_orphan(exec_ctx, fdn->fd, nullptr, nullptr, true /* already_closed */,
+  grpc_fd_orphan(fdn->fd, nullptr, nullptr, true /* already_closed */,
                  "c-ares query finished");
   gpr_free(fdn);
 }
 
-static void fd_node_shutdown(grpc_exec_ctx* exec_ctx, fd_node* fdn) {
+static void fd_node_shutdown(fd_node* fdn) {
   gpr_mu_lock(&fdn->mu);
   fdn->shutting_down = true;
   if (!fdn->readable_registered && !fdn->writable_registered) {
     gpr_mu_unlock(&fdn->mu);
-    fd_node_destroy(exec_ctx, fdn);
+    fd_node_destroy(fdn);
   } else {
     grpc_fd_shutdown(
-        exec_ctx, fdn->fd,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("c-ares fd shutdown"));
+        fdn->fd, GRPC_ERROR_CREATE_FROM_STATIC_STRING("c-ares fd shutdown"));
     gpr_mu_unlock(&fdn->mu);
   }
 }
@@ -160,15 +158,13 @@ void grpc_ares_ev_driver_destroy(grpc_ares_ev_driver* ev_driver) {
   grpc_ares_ev_driver_unref(ev_driver);
 }
 
-void grpc_ares_ev_driver_shutdown(grpc_exec_ctx* exec_ctx,
-                                  grpc_ares_ev_driver* ev_driver) {
+void grpc_ares_ev_driver_shutdown(grpc_ares_ev_driver* ev_driver) {
   gpr_mu_lock(&ev_driver->mu);
   ev_driver->shutting_down = true;
   fd_node* fn = ev_driver->fds;
   while (fn != nullptr) {
-    grpc_fd_shutdown(
-        exec_ctx, fn->fd,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("grpc_ares_ev_driver_shutdown"));
+    grpc_fd_shutdown(fn->fd, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                 "grpc_ares_ev_driver_shutdown"));
     fn = fn->next;
   }
   gpr_mu_unlock(&ev_driver->mu);
@@ -199,8 +195,7 @@ static bool grpc_ares_is_fd_still_readable(grpc_ares_ev_driver* ev_driver,
   return ioctl(fd, FIONREAD, &bytes_available) == 0 && bytes_available > 0;
 }
 
-static void on_readable_cb(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
+static void on_readable_cb(void* arg, grpc_error* error) {
   fd_node* fdn = (fd_node*)arg;
   grpc_ares_ev_driver* ev_driver = fdn->ev_driver;
   gpr_mu_lock(&fdn->mu);
@@ -208,7 +203,7 @@ static void on_readable_cb(grpc_exec_ctx* exec_ctx, void* arg,
   fdn->readable_registered = false;
   if (fdn->shutting_down && !fdn->writable_registered) {
     gpr_mu_unlock(&fdn->mu);
-    fd_node_destroy(exec_ctx, fdn);
+    fd_node_destroy(fdn);
     grpc_ares_ev_driver_unref(ev_driver);
     return;
   }
@@ -229,13 +224,12 @@ static void on_readable_cb(grpc_exec_ctx* exec_ctx, void* arg,
     ares_cancel(ev_driver->channel);
   }
   gpr_mu_lock(&ev_driver->mu);
-  grpc_ares_notify_on_event_locked(exec_ctx, ev_driver);
+  grpc_ares_notify_on_event_locked(ev_driver);
   gpr_mu_unlock(&ev_driver->mu);
   grpc_ares_ev_driver_unref(ev_driver);
 }
 
-static void on_writable_cb(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
+static void on_writable_cb(void* arg, grpc_error* error) {
   fd_node* fdn = (fd_node*)arg;
   grpc_ares_ev_driver* ev_driver = fdn->ev_driver;
   gpr_mu_lock(&fdn->mu);
@@ -243,7 +237,7 @@ static void on_writable_cb(grpc_exec_ctx* exec_ctx, void* arg,
   fdn->writable_registered = false;
   if (fdn->shutting_down && !fdn->readable_registered) {
     gpr_mu_unlock(&fdn->mu);
-    fd_node_destroy(exec_ctx, fdn);
+    fd_node_destroy(fdn);
     grpc_ares_ev_driver_unref(ev_driver);
     return;
   }
@@ -262,7 +256,7 @@ static void on_writable_cb(grpc_exec_ctx* exec_ctx, void* arg,
     ares_cancel(ev_driver->channel);
   }
   gpr_mu_lock(&ev_driver->mu);
-  grpc_ares_notify_on_event_locked(exec_ctx, ev_driver);
+  grpc_ares_notify_on_event_locked(ev_driver);
   gpr_mu_unlock(&ev_driver->mu);
   grpc_ares_ev_driver_unref(ev_driver);
 }
@@ -273,8 +267,7 @@ ares_channel* grpc_ares_ev_driver_get_channel(grpc_ares_ev_driver* ev_driver) {
 
 // Get the file descriptors used by the ev_driver's ares channel, register
 // driver_closure with these filedescriptors.
-static void grpc_ares_notify_on_event_locked(grpc_exec_ctx* exec_ctx,
-                                             grpc_ares_ev_driver* ev_driver) {
+static void grpc_ares_notify_on_event_locked(grpc_ares_ev_driver* ev_driver) {
   fd_node* new_list = nullptr;
   if (!ev_driver->shutting_down) {
     ares_socket_t socks[ARES_GETSOCK_MAXNUM];
@@ -300,7 +293,7 @@ static void grpc_ares_notify_on_event_locked(grpc_exec_ctx* exec_ctx,
                             grpc_schedule_on_exec_ctx);
           GRPC_CLOSURE_INIT(&fdn->write_closure, on_writable_cb, fdn,
                             grpc_schedule_on_exec_ctx);
-          grpc_pollset_set_add_fd(exec_ctx, ev_driver->pollset_set, fdn->fd);
+          grpc_pollset_set_add_fd(ev_driver->pollset_set, fdn->fd);
           gpr_free(fd_name);
         }
         fdn->next = new_list;
@@ -312,7 +305,7 @@ static void grpc_ares_notify_on_event_locked(grpc_exec_ctx* exec_ctx,
             !fdn->readable_registered) {
           grpc_ares_ev_driver_ref(ev_driver);
           gpr_log(GPR_DEBUG, "notify read on: %d", grpc_fd_wrapped_fd(fdn->fd));
-          grpc_fd_notify_on_read(exec_ctx, fdn->fd, &fdn->read_closure);
+          grpc_fd_notify_on_read(fdn->fd, &fdn->read_closure);
           fdn->readable_registered = true;
         }
         // Register write_closure if the socket is writable and write_closure
@@ -322,7 +315,7 @@ static void grpc_ares_notify_on_event_locked(grpc_exec_ctx* exec_ctx,
           gpr_log(GPR_DEBUG, "notify write on: %d",
                   grpc_fd_wrapped_fd(fdn->fd));
           grpc_ares_ev_driver_ref(ev_driver);
-          grpc_fd_notify_on_write(exec_ctx, fdn->fd, &fdn->write_closure);
+          grpc_fd_notify_on_write(fdn->fd, &fdn->write_closure);
           fdn->writable_registered = true;
         }
         gpr_mu_unlock(&fdn->mu);
@@ -335,7 +328,7 @@ static void grpc_ares_notify_on_event_locked(grpc_exec_ctx* exec_ctx,
   while (ev_driver->fds != nullptr) {
     fd_node* cur = ev_driver->fds;
     ev_driver->fds = ev_driver->fds->next;
-    fd_node_shutdown(exec_ctx, cur);
+    fd_node_shutdown(cur);
   }
   ev_driver->fds = new_list;
   // If the ev driver has no working fd, all the tasks are done.
@@ -345,12 +338,11 @@ static void grpc_ares_notify_on_event_locked(grpc_exec_ctx* exec_ctx,
   }
 }
 
-void grpc_ares_ev_driver_start(grpc_exec_ctx* exec_ctx,
-                               grpc_ares_ev_driver* ev_driver) {
+void grpc_ares_ev_driver_start(grpc_ares_ev_driver* ev_driver) {
   gpr_mu_lock(&ev_driver->mu);
   if (!ev_driver->working) {
     ev_driver->working = true;
-    grpc_ares_notify_on_event_locked(exec_ctx, ev_driver);
+    grpc_ares_notify_on_event_locked(ev_driver);
   }
   gpr_mu_unlock(&ev_driver->mu);
 }
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc
index 7846576c11..3a870b2d06 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc
@@ -96,24 +96,12 @@ static void grpc_ares_request_ref(grpc_ares_request* r) {
   gpr_ref(&r->pending_queries);
 }
 
-static void grpc_ares_request_unref(grpc_exec_ctx* exec_ctx,
-                                    grpc_ares_request* r) {
+static void grpc_ares_request_unref(grpc_ares_request* r) {
   /* If there are no pending queries, invoke on_done callback and destroy the
      request */
   if (gpr_unref(&r->pending_queries)) {
     /* TODO(zyc): Sort results with RFC6724 before invoking on_done. */
-    if (exec_ctx == nullptr) {
-      /* A new exec_ctx is created here, as the c-ares interface does not
-         provide one in ares_host_callback. It's safe to schedule on_done with
-         the newly created exec_ctx, since the caller has been warned not to
-         acquire locks in on_done. ares_dns_resolver is using combiner to
-         protect resources needed by on_done. */
-      grpc_exec_ctx new_exec_ctx = GRPC_EXEC_CTX_INIT;
-      GRPC_CLOSURE_SCHED(&new_exec_ctx, r->on_done, r->error);
-      grpc_exec_ctx_finish(&new_exec_ctx);
-    } else {
-      GRPC_CLOSURE_SCHED(exec_ctx, r->on_done, r->error);
-    }
+    GRPC_CLOSURE_SCHED(r->on_done, r->error);
     gpr_mu_destroy(&r->mu);
     grpc_ares_ev_driver_destroy(r->ev_driver);
     gpr_free(r);
@@ -133,9 +121,8 @@ static grpc_ares_hostbyname_request* create_hostbyname_request(
   return hr;
 }
 
-static void destroy_hostbyname_request(grpc_exec_ctx* exec_ctx,
-                                       grpc_ares_hostbyname_request* hr) {
-  grpc_ares_request_unref(exec_ctx, hr->parent_request);
+static void destroy_hostbyname_request(grpc_ares_hostbyname_request* hr) {
+  grpc_ares_request_unref(hr->parent_request);
   gpr_free(hr->host);
   gpr_free(hr);
 }
@@ -220,13 +207,13 @@ static void on_hostbyname_done_cb(void* arg, int status, int timeouts,
     }
   }
   gpr_mu_unlock(&r->mu);
-  destroy_hostbyname_request(nullptr, hr);
+  destroy_hostbyname_request(hr);
 }
 
 static void on_srv_query_done_cb(void* arg, int status, int timeouts,
                                  unsigned char* abuf, int alen) {
   grpc_ares_request* r = (grpc_ares_request*)arg;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_log(GPR_DEBUG, "on_query_srv_done_cb");
   if (status == ARES_SUCCESS) {
     gpr_log(GPR_DEBUG, "on_query_srv_done_cb ARES_SUCCESS");
@@ -246,7 +233,7 @@ static void on_srv_query_done_cb(void* arg, int status, int timeouts,
             r, srv_it->host, htons(srv_it->port), true /* is_balancer */);
         ares_gethostbyname(*channel, hr->host, AF_INET, on_hostbyname_done_cb,
                            hr);
-        grpc_ares_ev_driver_start(&exec_ctx, r->ev_driver);
+        grpc_ares_ev_driver_start(r->ev_driver);
       }
     }
     if (reply != nullptr) {
@@ -264,8 +251,7 @@ static void on_srv_query_done_cb(void* arg, int status, int timeouts,
       r->error = grpc_error_add_child(error, r->error);
     }
   }
-  grpc_ares_request_unref(&exec_ctx, r);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_ares_request_unref(r);
 }
 
 static const char g_service_config_attribute_prefix[] = "grpc_config=";
@@ -323,14 +309,13 @@ fail:
   }
 done:
   gpr_mu_unlock(&r->mu);
-  grpc_ares_request_unref(nullptr, r);
+  grpc_ares_request_unref(r);
 }
 
 static grpc_ares_request* grpc_dns_lookup_ares_impl(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* name,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** addrs, bool check_grpclb,
-    char** service_config_json) {
+    const char* dns_server, const char* name, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** addrs, bool check_grpclb, char** service_config_json) {
   grpc_error* error = GRPC_ERROR_NONE;
   grpc_ares_hostbyname_request* hr = nullptr;
   grpc_ares_request* r = nullptr;
@@ -437,28 +422,28 @@ static grpc_ares_request* grpc_dns_lookup_ares_impl(
     gpr_free(config_name);
   }
   /* TODO(zyc): Handle CNAME records here. */
-  grpc_ares_ev_driver_start(exec_ctx, r->ev_driver);
-  grpc_ares_request_unref(exec_ctx, r);
+  grpc_ares_ev_driver_start(r->ev_driver);
+  grpc_ares_request_unref(r);
   gpr_free(host);
   gpr_free(port);
   return r;
 
 error_cleanup:
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, error);
+  GRPC_CLOSURE_SCHED(on_done, error);
   gpr_free(host);
   gpr_free(port);
   return nullptr;
 }
 
 grpc_ares_request* (*grpc_dns_lookup_ares)(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* name,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** addrs, bool check_grpclb,
+    const char* dns_server, const char* name, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** addrs, bool check_grpclb,
     char** service_config_json) = grpc_dns_lookup_ares_impl;
 
-void grpc_cancel_ares_request(grpc_exec_ctx* exec_ctx, grpc_ares_request* r) {
+void grpc_cancel_ares_request(grpc_ares_request* r) {
   if (grpc_dns_lookup_ares == grpc_dns_lookup_ares_impl) {
-    grpc_ares_ev_driver_shutdown(exec_ctx, r->ev_driver);
+    grpc_ares_ev_driver_shutdown(r->ev_driver);
   }
 }
 
@@ -501,8 +486,7 @@ typedef struct grpc_resolve_address_ares_request {
   grpc_closure on_dns_lookup_done;
 } grpc_resolve_address_ares_request;
 
-static void on_dns_lookup_done_cb(grpc_exec_ctx* exec_ctx, void* arg,
-                                  grpc_error* error) {
+static void on_dns_lookup_done_cb(void* arg, grpc_error* error) {
   grpc_resolve_address_ares_request* r =
       (grpc_resolve_address_ares_request*)arg;
   grpc_resolved_addresses** resolved_addresses = r->addrs_out;
@@ -520,14 +504,12 @@ static void on_dns_lookup_done_cb(grpc_exec_ctx* exec_ctx, void* arg,
              &r->lb_addrs->addresses[i].address, sizeof(grpc_resolved_address));
     }
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, r->on_resolve_address_done,
-                     GRPC_ERROR_REF(error));
-  grpc_lb_addresses_destroy(exec_ctx, r->lb_addrs);
+  GRPC_CLOSURE_SCHED(r->on_resolve_address_done, GRPC_ERROR_REF(error));
+  grpc_lb_addresses_destroy(r->lb_addrs);
   gpr_free(r);
 }
 
-static void grpc_resolve_address_ares_impl(grpc_exec_ctx* exec_ctx,
-                                           const char* name,
+static void grpc_resolve_address_ares_impl(const char* name,
                                            const char* default_port,
                                            grpc_pollset_set* interested_parties,
                                            grpc_closure* on_done,
@@ -539,14 +521,14 @@ static void grpc_resolve_address_ares_impl(grpc_exec_ctx* exec_ctx,
   r->on_resolve_address_done = on_done;
   GRPC_CLOSURE_INIT(&r->on_dns_lookup_done, on_dns_lookup_done_cb, r,
                     grpc_schedule_on_exec_ctx);
-  grpc_dns_lookup_ares(exec_ctx, nullptr /* dns_server */, name, default_port,
+  grpc_dns_lookup_ares(nullptr /* dns_server */, name, default_port,
                        interested_parties, &r->on_dns_lookup_done, &r->lb_addrs,
                        false /* check_grpclb */,
                        nullptr /* service_config_json */);
 }
 
 void (*grpc_resolve_address_ares)(
-    grpc_exec_ctx* exec_ctx, const char* name, const char* default_port,
+    const char* name, const char* default_port,
     grpc_pollset_set* interested_parties, grpc_closure* on_done,
     grpc_resolved_addresses** addrs) = grpc_resolve_address_ares_impl;
 
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h
index 72db622954..86d870e0a6 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h
@@ -32,8 +32,7 @@ typedef struct grpc_ares_request grpc_ares_request;
    must be called at least once before this function. \a on_done may be
    called directly in this function without being scheduled with \a exec_ctx,
    so it must not try to acquire locks that are being held by the caller. */
-extern void (*grpc_resolve_address_ares)(grpc_exec_ctx* exec_ctx,
-                                         const char* name,
+extern void (*grpc_resolve_address_ares)(const char* name,
                                          const char* default_port,
                                          grpc_pollset_set* interested_parties,
                                          grpc_closure* on_done,
@@ -47,14 +46,13 @@ extern void (*grpc_resolve_address_ares)(grpc_exec_ctx* exec_ctx,
   scheduled with \a exec_ctx, so it must not try to acquire locks that are
   being held by the caller. */
 extern grpc_ares_request* (*grpc_dns_lookup_ares)(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* name,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** addresses, bool check_grpclb,
+    const char* dns_server, const char* name, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** addresses, bool check_grpclb,
     char** service_config_json);
 
 /* Cancel the pending grpc_ares_request \a request */
-void grpc_cancel_ares_request(grpc_exec_ctx* exec_ctx,
-                              grpc_ares_request* request);
+void grpc_cancel_ares_request(grpc_ares_request* request);
 
 /* Initialize gRPC ares wrapper. Must be called at least once before
    grpc_resolve_address_ares(). */
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper_fallback.cc b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper_fallback.cc
index a68a7c47fb..a184cf2d57 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper_fallback.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper_fallback.cc
@@ -26,34 +26,32 @@ struct grpc_ares_request {
 };
 
 static grpc_ares_request* grpc_dns_lookup_ares_impl(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* name,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** addrs, bool check_grpclb,
-    char** service_config_json) {
+    const char* dns_server, const char* name, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** addrs, bool check_grpclb, char** service_config_json) {
   return NULL;
 }
 
 grpc_ares_request* (*grpc_dns_lookup_ares)(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* name,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** addrs, bool check_grpclb,
+    const char* dns_server, const char* name, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** addrs, bool check_grpclb,
     char** service_config_json) = grpc_dns_lookup_ares_impl;
 
-void grpc_cancel_ares_request(grpc_exec_ctx* exec_ctx, grpc_ares_request* r) {}
+void grpc_cancel_ares_request(grpc_ares_request* r) {}
 
 grpc_error* grpc_ares_init(void) { return GRPC_ERROR_NONE; }
 
 void grpc_ares_cleanup(void) {}
 
-static void grpc_resolve_address_ares_impl(grpc_exec_ctx* exec_ctx,
-                                           const char* name,
+static void grpc_resolve_address_ares_impl(const char* name,
                                            const char* default_port,
                                            grpc_pollset_set* interested_parties,
                                            grpc_closure* on_done,
                                            grpc_resolved_addresses** addrs) {}
 
 void (*grpc_resolve_address_ares)(
-    grpc_exec_ctx* exec_ctx, const char* name, const char* default_port,
+    const char* name, const char* default_port,
     grpc_pollset_set* interested_parties, grpc_closure* on_done,
     grpc_resolved_addresses** addrs) = grpc_resolve_address_ares_impl;
 
diff --git a/src/core/ext/filters/client_channel/resolver/dns/native/dns_resolver.cc b/src/core/ext/filters/client_channel/resolver/dns/native/dns_resolver.cc
index 03a7b446f6..1c2cfc08e7 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/native/dns_resolver.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/native/dns_resolver.cc
@@ -76,49 +76,42 @@ typedef struct {
   grpc_resolved_addresses* addresses;
 } dns_resolver;
 
-static void dns_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* r);
+static void dns_destroy(grpc_resolver* r);
 
-static void dns_start_resolving_locked(grpc_exec_ctx* exec_ctx,
-                                       dns_resolver* r);
-static void dns_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                         dns_resolver* r);
+static void dns_start_resolving_locked(dns_resolver* r);
+static void dns_maybe_finish_next_locked(dns_resolver* r);
 
-static void dns_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* r);
-static void dns_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                         grpc_resolver* r);
-static void dns_next_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* r,
-                            grpc_channel_args** target_result,
+static void dns_shutdown_locked(grpc_resolver* r);
+static void dns_channel_saw_error_locked(grpc_resolver* r);
+static void dns_next_locked(grpc_resolver* r, grpc_channel_args** target_result,
                             grpc_closure* on_complete);
 
 static const grpc_resolver_vtable dns_resolver_vtable = {
     dns_destroy, dns_shutdown_locked, dns_channel_saw_error_locked,
     dns_next_locked};
 
-static void dns_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                grpc_resolver* resolver) {
+static void dns_shutdown_locked(grpc_resolver* resolver) {
   dns_resolver* r = (dns_resolver*)resolver;
   if (r->have_retry_timer) {
-    grpc_timer_cancel(exec_ctx, &r->retry_timer);
+    grpc_timer_cancel(&r->retry_timer);
   }
   if (r->next_completion != nullptr) {
     *r->target_result = nullptr;
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, r->next_completion,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Resolver Shutdown"));
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                               "Resolver Shutdown"));
     r->next_completion = nullptr;
   }
 }
 
-static void dns_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                         grpc_resolver* resolver) {
+static void dns_channel_saw_error_locked(grpc_resolver* resolver) {
   dns_resolver* r = (dns_resolver*)resolver;
   if (!r->resolving) {
     r->backoff->Reset();
-    dns_start_resolving_locked(exec_ctx, r);
+    dns_start_resolving_locked(r);
   }
 }
 
-static void dns_next_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver,
+static void dns_next_locked(grpc_resolver* resolver,
                             grpc_channel_args** target_result,
                             grpc_closure* on_complete) {
   dns_resolver* r = (dns_resolver*)resolver;
@@ -127,28 +120,26 @@ static void dns_next_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver,
   r->target_result = target_result;
   if (r->resolved_version == 0 && !r->resolving) {
     r->backoff->Reset();
-    dns_start_resolving_locked(exec_ctx, r);
+    dns_start_resolving_locked(r);
   } else {
-    dns_maybe_finish_next_locked(exec_ctx, r);
+    dns_maybe_finish_next_locked(r);
   }
 }
 
-static void dns_on_retry_timer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_error* error) {
+static void dns_on_retry_timer_locked(void* arg, grpc_error* error) {
   dns_resolver* r = (dns_resolver*)arg;
 
   r->have_retry_timer = false;
   if (error == GRPC_ERROR_NONE) {
     if (!r->resolving) {
-      dns_start_resolving_locked(exec_ctx, r);
+      dns_start_resolving_locked(r);
     }
   }
 
-  GRPC_RESOLVER_UNREF(exec_ctx, &r->base, "retry-timer");
+  GRPC_RESOLVER_UNREF(&r->base, "retry-timer");
 }
 
-static void dns_on_resolved_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void dns_on_resolved_locked(void* arg, grpc_error* error) {
   dns_resolver* r = (dns_resolver*)arg;
   grpc_channel_args* result = nullptr;
   GPR_ASSERT(r->resolving);
@@ -168,10 +159,10 @@ static void dns_on_resolved_locked(grpc_exec_ctx* exec_ctx, void* arg,
     grpc_arg new_arg = grpc_lb_addresses_create_channel_arg(addresses);
     result = grpc_channel_args_copy_and_add(r->channel_args, &new_arg, 1);
     grpc_resolved_addresses_destroy(r->addresses);
-    grpc_lb_addresses_destroy(exec_ctx, addresses);
+    grpc_lb_addresses_destroy(addresses);
   } else {
-    grpc_millis next_try = r->backoff->Step(exec_ctx);
-    grpc_millis timeout = next_try - grpc_exec_ctx_now(exec_ctx);
+    grpc_millis next_try = r->backoff->Step();
+    grpc_millis timeout = next_try - grpc_core::ExecCtx::Get()->Now();
     gpr_log(GPR_INFO, "dns resolution failed (will retry): %s",
             grpc_error_string(error));
     GPR_ASSERT(!r->have_retry_timer);
@@ -184,59 +175,56 @@ static void dns_on_resolved_locked(grpc_exec_ctx* exec_ctx, void* arg,
     }
     GRPC_CLOSURE_INIT(&r->on_retry, dns_on_retry_timer_locked, r,
                       grpc_combiner_scheduler(r->base.combiner));
-    grpc_timer_init(exec_ctx, &r->retry_timer, next_try, &r->on_retry);
+    grpc_timer_init(&r->retry_timer, next_try, &r->on_retry);
   }
   if (r->resolved_result != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, r->resolved_result);
+    grpc_channel_args_destroy(r->resolved_result);
   }
   r->resolved_result = result;
   r->resolved_version++;
-  dns_maybe_finish_next_locked(exec_ctx, r);
+  dns_maybe_finish_next_locked(r);
   GRPC_ERROR_UNREF(error);
 
-  GRPC_RESOLVER_UNREF(exec_ctx, &r->base, "dns-resolving");
+  GRPC_RESOLVER_UNREF(&r->base, "dns-resolving");
 }
 
-static void dns_start_resolving_locked(grpc_exec_ctx* exec_ctx,
-                                       dns_resolver* r) {
+static void dns_start_resolving_locked(dns_resolver* r) {
   GRPC_RESOLVER_REF(&r->base, "dns-resolving");
   GPR_ASSERT(!r->resolving);
   r->resolving = true;
   r->addresses = nullptr;
   grpc_resolve_address(
-      exec_ctx, r->name_to_resolve, r->default_port, r->interested_parties,
+      r->name_to_resolve, r->default_port, r->interested_parties,
       GRPC_CLOSURE_CREATE(dns_on_resolved_locked, r,
                           grpc_combiner_scheduler(r->base.combiner)),
       &r->addresses);
 }
 
-static void dns_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                         dns_resolver* r) {
+static void dns_maybe_finish_next_locked(dns_resolver* r) {
   if (r->next_completion != nullptr &&
       r->resolved_version != r->published_version) {
     *r->target_result = r->resolved_result == nullptr
                             ? nullptr
                             : grpc_channel_args_copy(r->resolved_result);
-    GRPC_CLOSURE_SCHED(exec_ctx, r->next_completion, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_NONE);
     r->next_completion = nullptr;
     r->published_version = r->resolved_version;
   }
 }
 
-static void dns_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* gr) {
+static void dns_destroy(grpc_resolver* gr) {
   dns_resolver* r = (dns_resolver*)gr;
   if (r->resolved_result != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, r->resolved_result);
+    grpc_channel_args_destroy(r->resolved_result);
   }
-  grpc_pollset_set_destroy(exec_ctx, r->interested_parties);
+  grpc_pollset_set_destroy(r->interested_parties);
   gpr_free(r->name_to_resolve);
   gpr_free(r->default_port);
-  grpc_channel_args_destroy(exec_ctx, r->channel_args);
+  grpc_channel_args_destroy(r->channel_args);
   gpr_free(r);
 }
 
-static grpc_resolver* dns_create(grpc_exec_ctx* exec_ctx,
-                                 grpc_resolver_args* args,
+static grpc_resolver* dns_create(grpc_resolver_args* args,
                                  const char* default_port) {
   if (0 != strcmp(args->uri->authority, "")) {
     gpr_log(GPR_ERROR, "authority based dns uri's not supported");
@@ -253,8 +241,7 @@ static grpc_resolver* dns_create(grpc_exec_ctx* exec_ctx,
   r->channel_args = grpc_channel_args_copy(args->args);
   r->interested_parties = grpc_pollset_set_create();
   if (args->pollset_set != nullptr) {
-    grpc_pollset_set_add_pollset_set(exec_ctx, r->interested_parties,
-                                     args->pollset_set);
+    grpc_pollset_set_add_pollset_set(r->interested_parties, args->pollset_set);
   }
   grpc_core::BackOff::Options backoff_options;
   backoff_options
@@ -275,9 +262,8 @@ static void dns_factory_ref(grpc_resolver_factory* factory) {}
 static void dns_factory_unref(grpc_resolver_factory* factory) {}
 
 static grpc_resolver* dns_factory_create_resolver(
-    grpc_exec_ctx* exec_ctx, grpc_resolver_factory* factory,
-    grpc_resolver_args* args) {
-  return dns_create(exec_ctx, args, "https");
+    grpc_resolver_factory* factory, grpc_resolver_args* args) {
+  return dns_create(args, "https");
 }
 
 static char* dns_factory_get_default_host_name(grpc_resolver_factory* factory,
diff --git a/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.cc b/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.cc
index 44798ca434..fe3ad1403c 100644
--- a/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.cc
+++ b/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.cc
@@ -67,57 +67,52 @@ typedef struct {
   grpc_channel_args** target_result;
 } fake_resolver;
 
-static void fake_resolver_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* gr) {
+static void fake_resolver_destroy(grpc_resolver* gr) {
   fake_resolver* r = (fake_resolver*)gr;
-  grpc_channel_args_destroy(exec_ctx, r->next_results);
-  grpc_channel_args_destroy(exec_ctx, r->results_upon_error);
-  grpc_channel_args_destroy(exec_ctx, r->channel_args);
+  grpc_channel_args_destroy(r->next_results);
+  grpc_channel_args_destroy(r->results_upon_error);
+  grpc_channel_args_destroy(r->channel_args);
   gpr_free(r);
 }
 
-static void fake_resolver_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                          grpc_resolver* resolver) {
+static void fake_resolver_shutdown_locked(grpc_resolver* resolver) {
   fake_resolver* r = (fake_resolver*)resolver;
   if (r->next_completion != nullptr) {
     *r->target_result = nullptr;
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, r->next_completion,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Resolver Shutdown"));
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                               "Resolver Shutdown"));
     r->next_completion = nullptr;
   }
 }
 
-static void fake_resolver_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                                   fake_resolver* r) {
+static void fake_resolver_maybe_finish_next_locked(fake_resolver* r) {
   if (r->next_completion != nullptr && r->next_results != nullptr) {
     *r->target_result =
         grpc_channel_args_union(r->next_results, r->channel_args);
-    grpc_channel_args_destroy(exec_ctx, r->next_results);
+    grpc_channel_args_destroy(r->next_results);
     r->next_results = nullptr;
-    GRPC_CLOSURE_SCHED(exec_ctx, r->next_completion, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_NONE);
     r->next_completion = nullptr;
   }
 }
 
-static void fake_resolver_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                                   grpc_resolver* resolver) {
+static void fake_resolver_channel_saw_error_locked(grpc_resolver* resolver) {
   fake_resolver* r = (fake_resolver*)resolver;
   if (r->next_results == nullptr && r->results_upon_error != nullptr) {
     // Pretend we re-resolved.
     r->next_results = grpc_channel_args_copy(r->results_upon_error);
   }
-  fake_resolver_maybe_finish_next_locked(exec_ctx, r);
+  fake_resolver_maybe_finish_next_locked(r);
 }
 
-static void fake_resolver_next_locked(grpc_exec_ctx* exec_ctx,
-                                      grpc_resolver* resolver,
+static void fake_resolver_next_locked(grpc_resolver* resolver,
                                       grpc_channel_args** target_result,
                                       grpc_closure* on_complete) {
   fake_resolver* r = (fake_resolver*)resolver;
   GPR_ASSERT(!r->next_completion);
   r->next_completion = on_complete;
   r->target_result = target_result;
-  fake_resolver_maybe_finish_next_locked(exec_ctx, r);
+  fake_resolver_maybe_finish_next_locked(r);
 }
 
 static const grpc_resolver_vtable fake_resolver_vtable = {
@@ -157,33 +152,31 @@ typedef struct set_response_closure_arg {
   grpc_channel_args* next_response;
 } set_response_closure_arg;
 
-static void set_response_closure_fn(grpc_exec_ctx* exec_ctx, void* arg,
-                                    grpc_error* error) {
+static void set_response_closure_fn(void* arg, grpc_error* error) {
   set_response_closure_arg* closure_arg = (set_response_closure_arg*)arg;
   grpc_fake_resolver_response_generator* generator = closure_arg->generator;
   fake_resolver* r = generator->resolver;
   if (r->next_results != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, r->next_results);
+    grpc_channel_args_destroy(r->next_results);
   }
   r->next_results = closure_arg->next_response;
   if (r->results_upon_error != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, r->results_upon_error);
+    grpc_channel_args_destroy(r->results_upon_error);
   }
   r->results_upon_error = grpc_channel_args_copy(closure_arg->next_response);
   gpr_free(closure_arg);
-  fake_resolver_maybe_finish_next_locked(exec_ctx, r);
+  fake_resolver_maybe_finish_next_locked(r);
 }
 
 void grpc_fake_resolver_response_generator_set_response(
-    grpc_exec_ctx* exec_ctx, grpc_fake_resolver_response_generator* generator,
+    grpc_fake_resolver_response_generator* generator,
     grpc_channel_args* next_response) {
   GPR_ASSERT(generator->resolver != nullptr);
   set_response_closure_arg* closure_arg =
       (set_response_closure_arg*)gpr_zalloc(sizeof(*closure_arg));
   closure_arg->generator = generator;
   closure_arg->next_response = grpc_channel_args_copy(next_response);
-  GRPC_CLOSURE_SCHED(exec_ctx,
-                     GRPC_CLOSURE_INIT(&closure_arg->set_response_closure,
+  GRPC_CLOSURE_SCHED(GRPC_CLOSURE_INIT(&closure_arg->set_response_closure,
                                        set_response_closure_fn, closure_arg,
                                        grpc_combiner_scheduler(
                                            generator->resolver->base.combiner)),
@@ -195,7 +188,7 @@ static void* response_generator_arg_copy(void* p) {
       (grpc_fake_resolver_response_generator*)p);
 }
 
-static void response_generator_arg_destroy(grpc_exec_ctx* exec_ctx, void* p) {
+static void response_generator_arg_destroy(void* p) {
   grpc_fake_resolver_response_generator_unref(
       (grpc_fake_resolver_response_generator*)p);
 }
@@ -232,8 +225,7 @@ static void fake_resolver_factory_ref(grpc_resolver_factory* factory) {}
 
 static void fake_resolver_factory_unref(grpc_resolver_factory* factory) {}
 
-static grpc_resolver* fake_resolver_create(grpc_exec_ctx* exec_ctx,
-                                           grpc_resolver_factory* factory,
+static grpc_resolver* fake_resolver_create(grpc_resolver_factory* factory,
                                            grpc_resolver_args* args) {
   fake_resolver* r = (fake_resolver*)gpr_zalloc(sizeof(*r));
   r->channel_args = grpc_channel_args_copy(args->args);
diff --git a/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h b/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h
index 7035cdda01..a8977e5980 100644
--- a/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h
+++ b/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h
@@ -39,7 +39,7 @@ grpc_fake_resolver_response_generator_create();
 // Instruct the fake resolver associated with the \a response_generator instance
 // to trigger a new resolution for \a uri and \a args.
 void grpc_fake_resolver_response_generator_set_response(
-    grpc_exec_ctx* exec_ctx, grpc_fake_resolver_response_generator* generator,
+    grpc_fake_resolver_response_generator* generator,
     grpc_channel_args* next_response);
 
 // Return a \a grpc_arg for a \a grpc_fake_resolver_response_generator instance.
diff --git a/src/core/ext/filters/client_channel/resolver/sockaddr/sockaddr_resolver.cc b/src/core/ext/filters/client_channel/resolver/sockaddr/sockaddr_resolver.cc
index f0934b5943..7d1e283fa3 100644
--- a/src/core/ext/filters/client_channel/resolver/sockaddr/sockaddr_resolver.cc
+++ b/src/core/ext/filters/client_channel/resolver/sockaddr/sockaddr_resolver.cc
@@ -52,15 +52,13 @@ typedef struct {
   grpc_channel_args** target_result;
 } sockaddr_resolver;
 
-static void sockaddr_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* r);
+static void sockaddr_destroy(grpc_resolver* r);
 
-static void sockaddr_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                              sockaddr_resolver* r);
+static void sockaddr_maybe_finish_next_locked(sockaddr_resolver* r);
 
-static void sockaddr_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* r);
-static void sockaddr_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                              grpc_resolver* r);
-static void sockaddr_next_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* r,
+static void sockaddr_shutdown_locked(grpc_resolver* r);
+static void sockaddr_channel_saw_error_locked(grpc_resolver* r);
+static void sockaddr_next_locked(grpc_resolver* r,
                                  grpc_channel_args** target_result,
                                  grpc_closure* on_complete);
 
@@ -68,52 +66,47 @@ static const grpc_resolver_vtable sockaddr_resolver_vtable = {
     sockaddr_destroy, sockaddr_shutdown_locked,
     sockaddr_channel_saw_error_locked, sockaddr_next_locked};
 
-static void sockaddr_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_resolver* resolver) {
+static void sockaddr_shutdown_locked(grpc_resolver* resolver) {
   sockaddr_resolver* r = (sockaddr_resolver*)resolver;
   if (r->next_completion != nullptr) {
     *r->target_result = nullptr;
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, r->next_completion,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Resolver Shutdown"));
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                               "Resolver Shutdown"));
     r->next_completion = nullptr;
   }
 }
 
-static void sockaddr_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                              grpc_resolver* resolver) {
+static void sockaddr_channel_saw_error_locked(grpc_resolver* resolver) {
   sockaddr_resolver* r = (sockaddr_resolver*)resolver;
   r->published = false;
-  sockaddr_maybe_finish_next_locked(exec_ctx, r);
+  sockaddr_maybe_finish_next_locked(r);
 }
 
-static void sockaddr_next_locked(grpc_exec_ctx* exec_ctx,
-                                 grpc_resolver* resolver,
+static void sockaddr_next_locked(grpc_resolver* resolver,
                                  grpc_channel_args** target_result,
                                  grpc_closure* on_complete) {
   sockaddr_resolver* r = (sockaddr_resolver*)resolver;
   GPR_ASSERT(!r->next_completion);
   r->next_completion = on_complete;
   r->target_result = target_result;
-  sockaddr_maybe_finish_next_locked(exec_ctx, r);
+  sockaddr_maybe_finish_next_locked(r);
 }
 
-static void sockaddr_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                              sockaddr_resolver* r) {
+static void sockaddr_maybe_finish_next_locked(sockaddr_resolver* r) {
   if (r->next_completion != nullptr && !r->published) {
     r->published = true;
     grpc_arg arg = grpc_lb_addresses_create_channel_arg(r->addresses);
     *r->target_result =
         grpc_channel_args_copy_and_add(r->channel_args, &arg, 1);
-    GRPC_CLOSURE_SCHED(exec_ctx, r->next_completion, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_NONE);
     r->next_completion = nullptr;
   }
 }
 
-static void sockaddr_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* gr) {
+static void sockaddr_destroy(grpc_resolver* gr) {
   sockaddr_resolver* r = (sockaddr_resolver*)gr;
-  grpc_lb_addresses_destroy(exec_ctx, r->addresses);
-  grpc_channel_args_destroy(exec_ctx, r->channel_args);
+  grpc_lb_addresses_destroy(r->addresses);
+  grpc_channel_args_destroy(r->channel_args);
   gpr_free(r);
 }
 
@@ -142,8 +135,7 @@ char* unix_get_default_authority(grpc_resolver_factory* factory,
 
 static void do_nothing(void* ignored) {}
 
-static grpc_resolver* sockaddr_create(grpc_exec_ctx* exec_ctx,
-                                      grpc_resolver_args* args,
+static grpc_resolver* sockaddr_create(grpc_resolver_args* args,
                                       bool parse(const grpc_uri* uri,
                                                  grpc_resolved_address* dst)) {
   if (0 != strcmp(args->uri->authority, "")) {
@@ -170,10 +162,10 @@ static grpc_resolver* sockaddr_create(grpc_exec_ctx* exec_ctx,
     gpr_free(part_str);
     if (errors_found) break;
   }
-  grpc_slice_buffer_destroy_internal(exec_ctx, &path_parts);
-  grpc_slice_unref_internal(exec_ctx, path_slice);
+  grpc_slice_buffer_destroy_internal(&path_parts);
+  grpc_slice_unref_internal(path_slice);
   if (errors_found) {
-    grpc_lb_addresses_destroy(exec_ctx, addresses);
+    grpc_lb_addresses_destroy(addresses);
     return nullptr;
   }
   /* Instantiate resolver. */
@@ -195,9 +187,8 @@ static void sockaddr_factory_unref(grpc_resolver_factory* factory) {}
 
 #define DECL_FACTORY(name)                                                  \
   static grpc_resolver* name##_factory_create_resolver(                     \
-      grpc_exec_ctx* exec_ctx, grpc_resolver_factory* factory,              \
-      grpc_resolver_args* args) {                                           \
-    return sockaddr_create(exec_ctx, args, grpc_parse_##name);              \
+      grpc_resolver_factory* factory, grpc_resolver_args* args) {           \
+    return sockaddr_create(args, grpc_parse_##name);                        \
   }                                                                         \
   static const grpc_resolver_factory_vtable name##_factory_vtable = {       \
       sockaddr_factory_ref, sockaddr_factory_unref,                         \
diff --git a/src/core/ext/filters/client_channel/resolver_factory.cc b/src/core/ext/filters/client_channel/resolver_factory.cc
index 1a289d9771..9b3ec2f1c4 100644
--- a/src/core/ext/filters/client_channel/resolver_factory.cc
+++ b/src/core/ext/filters/client_channel/resolver_factory.cc
@@ -28,10 +28,9 @@ void grpc_resolver_factory_unref(grpc_resolver_factory* factory) {
 
 /** Create a resolver instance for a name */
 grpc_resolver* grpc_resolver_factory_create_resolver(
-    grpc_exec_ctx* exec_ctx, grpc_resolver_factory* factory,
-    grpc_resolver_args* args) {
+    grpc_resolver_factory* factory, grpc_resolver_args* args) {
   if (factory == nullptr) return nullptr;
-  return factory->vtable->create_resolver(exec_ctx, factory, args);
+  return factory->vtable->create_resolver(factory, args);
 }
 
 char* grpc_resolver_factory_get_default_authority(
diff --git a/src/core/ext/filters/client_channel/resolver_factory.h b/src/core/ext/filters/client_channel/resolver_factory.h
index fcf8ec425e..170ecc0b48 100644
--- a/src/core/ext/filters/client_channel/resolver_factory.h
+++ b/src/core/ext/filters/client_channel/resolver_factory.h
@@ -43,8 +43,7 @@ struct grpc_resolver_factory_vtable {
   void (*unref)(grpc_resolver_factory* factory);
 
   /** Implementation of grpc_resolver_factory_create_resolver */
-  grpc_resolver* (*create_resolver)(grpc_exec_ctx* exec_ctx,
-                                    grpc_resolver_factory* factory,
+  grpc_resolver* (*create_resolver)(grpc_resolver_factory* factory,
                                     grpc_resolver_args* args);
 
   /** Implementation of grpc_resolver_factory_get_default_authority */
@@ -59,8 +58,7 @@ void grpc_resolver_factory_unref(grpc_resolver_factory* resolver);
 
 /** Create a resolver instance for a name */
 grpc_resolver* grpc_resolver_factory_create_resolver(
-    grpc_exec_ctx* exec_ctx, grpc_resolver_factory* factory,
-    grpc_resolver_args* args);
+    grpc_resolver_factory* factory, grpc_resolver_args* args);
 
 /** Return a (freshly allocated with gpr_malloc) string representing
     the default authority to use for this scheme. */
diff --git a/src/core/ext/filters/client_channel/resolver_registry.cc b/src/core/ext/filters/client_channel/resolver_registry.cc
index 5da6114a3d..3f8451de6b 100644
--- a/src/core/ext/filters/client_channel/resolver_registry.cc
+++ b/src/core/ext/filters/client_channel/resolver_registry.cc
@@ -92,23 +92,22 @@ static grpc_resolver_factory* lookup_factory_by_uri(grpc_uri* uri) {
   return lookup_factory(uri->scheme);
 }
 
-static grpc_resolver_factory* resolve_factory(grpc_exec_ctx* exec_ctx,
-                                              const char* target,
+static grpc_resolver_factory* resolve_factory(const char* target,
                                               grpc_uri** uri,
                                               char** canonical_target) {
   grpc_resolver_factory* factory = nullptr;
 
   GPR_ASSERT(uri != nullptr);
-  *uri = grpc_uri_parse(exec_ctx, target, 1);
+  *uri = grpc_uri_parse(target, 1);
   factory = lookup_factory_by_uri(*uri);
   if (factory == nullptr) {
     grpc_uri_destroy(*uri);
     gpr_asprintf(canonical_target, "%s%s", g_default_resolver_prefix, target);
-    *uri = grpc_uri_parse(exec_ctx, *canonical_target, 1);
+    *uri = grpc_uri_parse(*canonical_target, 1);
     factory = lookup_factory_by_uri(*uri);
     if (factory == nullptr) {
-      grpc_uri_destroy(grpc_uri_parse(exec_ctx, target, 0));
-      grpc_uri_destroy(grpc_uri_parse(exec_ctx, *canonical_target, 0));
+      grpc_uri_destroy(grpc_uri_parse(target, 0));
+      grpc_uri_destroy(grpc_uri_parse(*canonical_target, 0));
       gpr_log(GPR_ERROR, "don't know how to resolve '%s' or '%s'", target,
               *canonical_target);
     }
@@ -116,14 +115,14 @@ static grpc_resolver_factory* resolve_factory(grpc_exec_ctx* exec_ctx,
   return factory;
 }
 
-grpc_resolver* grpc_resolver_create(grpc_exec_ctx* exec_ctx, const char* target,
+grpc_resolver* grpc_resolver_create(const char* target,
                                     const grpc_channel_args* args,
                                     grpc_pollset_set* pollset_set,
                                     grpc_combiner* combiner) {
   grpc_uri* uri = nullptr;
   char* canonical_target = nullptr;
   grpc_resolver_factory* factory =
-      resolve_factory(exec_ctx, target, &uri, &canonical_target);
+      resolve_factory(target, &uri, &canonical_target);
   grpc_resolver* resolver;
   grpc_resolver_args resolver_args;
   memset(&resolver_args, 0, sizeof(resolver_args));
@@ -131,29 +130,27 @@ grpc_resolver* grpc_resolver_create(grpc_exec_ctx* exec_ctx, const char* target,
   resolver_args.args = args;
   resolver_args.pollset_set = pollset_set;
   resolver_args.combiner = combiner;
-  resolver =
-      grpc_resolver_factory_create_resolver(exec_ctx, factory, &resolver_args);
+  resolver = grpc_resolver_factory_create_resolver(factory, &resolver_args);
   grpc_uri_destroy(uri);
   gpr_free(canonical_target);
   return resolver;
 }
 
-char* grpc_get_default_authority(grpc_exec_ctx* exec_ctx, const char* target) {
+char* grpc_get_default_authority(const char* target) {
   grpc_uri* uri = nullptr;
   char* canonical_target = nullptr;
   grpc_resolver_factory* factory =
-      resolve_factory(exec_ctx, target, &uri, &canonical_target);
+      resolve_factory(target, &uri, &canonical_target);
   char* authority = grpc_resolver_factory_get_default_authority(factory, uri);
   grpc_uri_destroy(uri);
   gpr_free(canonical_target);
   return authority;
 }
 
-char* grpc_resolver_factory_add_default_prefix_if_needed(
-    grpc_exec_ctx* exec_ctx, const char* target) {
+char* grpc_resolver_factory_add_default_prefix_if_needed(const char* target) {
   grpc_uri* uri = nullptr;
   char* canonical_target = nullptr;
-  resolve_factory(exec_ctx, target, &uri, &canonical_target);
+  resolve_factory(target, &uri, &canonical_target);
   grpc_uri_destroy(uri);
   return canonical_target == nullptr ? gpr_strdup(target) : canonical_target;
 }
diff --git a/src/core/ext/filters/client_channel/resolver_registry.h b/src/core/ext/filters/client_channel/resolver_registry.h
index ecc9f824e8..bbd30df8da 100644
--- a/src/core/ext/filters/client_channel/resolver_registry.h
+++ b/src/core/ext/filters/client_channel/resolver_registry.h
@@ -48,7 +48,7 @@ void grpc_register_resolver_type(grpc_resolver_factory* factory);
     (typically the set of arguments passed in from the client API).
     \a pollset_set is used to drive IO in the name resolution process, it
     should not be NULL. */
-grpc_resolver* grpc_resolver_create(grpc_exec_ctx* exec_ctx, const char* target,
+grpc_resolver* grpc_resolver_create(const char* target,
                                     const grpc_channel_args* args,
                                     grpc_pollset_set* pollset_set,
                                     grpc_combiner* combiner);
@@ -59,11 +59,10 @@ grpc_resolver_factory* grpc_resolver_factory_lookup(const char* name);
 
 /** Given a target, return a (freshly allocated with gpr_malloc) string
     representing the default authority to pass from a client. */
-char* grpc_get_default_authority(grpc_exec_ctx* exec_ctx, const char* target);
+char* grpc_get_default_authority(const char* target);
 
 /** Returns a newly allocated string containing \a target, adding the
     default prefix if needed. */
-char* grpc_resolver_factory_add_default_prefix_if_needed(
-    grpc_exec_ctx* exec_ctx, const char* target);
+char* grpc_resolver_factory_add_default_prefix_if_needed(const char* target);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_RESOLVER_REGISTRY_H */
diff --git a/src/core/ext/filters/client_channel/subchannel.cc b/src/core/ext/filters/client_channel/subchannel.cc
index ce061c9782..f07394d29b 100644
--- a/src/core/ext/filters/client_channel/subchannel.cc
+++ b/src/core/ext/filters/client_channel/subchannel.cc
@@ -143,8 +143,7 @@ struct grpc_subchannel_call {
 #define CALLSTACK_TO_SUBCHANNEL_CALL(callstack) \
   (((grpc_subchannel_call*)(callstack)) - 1)
 
-static void subchannel_connected(grpc_exec_ctx* exec_ctx, void* subchannel,
-                                 grpc_error* error);
+static void subchannel_connected(void* subchannel, grpc_error* error);
 
 #ifndef NDEBUG
 #define REF_REASON reason
@@ -161,10 +160,9 @@ static void subchannel_connected(grpc_exec_ctx* exec_ctx, void* subchannel,
  * connection implementation
  */
 
-static void connection_destroy(grpc_exec_ctx* exec_ctx, void* arg,
-                               grpc_error* error) {
+static void connection_destroy(void* arg, grpc_error* error) {
   grpc_connected_subchannel* c = (grpc_connected_subchannel*)arg;
-  grpc_channel_stack_destroy(exec_ctx, CHANNEL_STACK_FROM_CONNECTION(c));
+  grpc_channel_stack_destroy(CHANNEL_STACK_FROM_CONNECTION(c));
   gpr_free(c);
 }
 
@@ -174,26 +172,23 @@ grpc_connected_subchannel* grpc_connected_subchannel_ref(
   return c;
 }
 
-void grpc_connected_subchannel_unref(grpc_exec_ctx* exec_ctx,
-                                     grpc_connected_subchannel* c
-                                         GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, CHANNEL_STACK_FROM_CONNECTION(c),
-                           REF_REASON);
+void grpc_connected_subchannel_unref(
+    grpc_connected_subchannel* c GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
+  GRPC_CHANNEL_STACK_UNREF(CHANNEL_STACK_FROM_CONNECTION(c), REF_REASON);
 }
 
 /*
  * grpc_subchannel implementation
  */
 
-static void subchannel_destroy(grpc_exec_ctx* exec_ctx, void* arg,
-                               grpc_error* error) {
+static void subchannel_destroy(void* arg, grpc_error* error) {
   grpc_subchannel* c = (grpc_subchannel*)arg;
   gpr_free((void*)c->filters);
-  grpc_channel_args_destroy(exec_ctx, c->args);
-  grpc_connectivity_state_destroy(exec_ctx, &c->state_tracker);
-  grpc_connector_unref(exec_ctx, c->connector);
-  grpc_pollset_set_destroy(exec_ctx, c->pollset_set);
-  grpc_subchannel_key_destroy(exec_ctx, c->key);
+  grpc_channel_args_destroy(c->args);
+  grpc_connectivity_state_destroy(&c->state_tracker);
+  grpc_connector_unref(c->connector);
+  grpc_pollset_set_destroy(c->pollset_set);
+  grpc_subchannel_key_destroy(c->key);
   gpr_mu_destroy(&c->mu);
   gpr_free(c);
 }
@@ -245,43 +240,39 @@ grpc_subchannel* grpc_subchannel_ref_from_weak_ref(
   }
 }
 
-static void disconnect(grpc_exec_ctx* exec_ctx, grpc_subchannel* c) {
+static void disconnect(grpc_subchannel* c) {
   grpc_connected_subchannel* con;
-  grpc_subchannel_index_unregister(exec_ctx, c->key, c);
+  grpc_subchannel_index_unregister(c->key, c);
   gpr_mu_lock(&c->mu);
   GPR_ASSERT(!c->disconnected);
   c->disconnected = true;
-  grpc_connector_shutdown(
-      exec_ctx, c->connector,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("Subchannel disconnected"));
+  grpc_connector_shutdown(c->connector, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                            "Subchannel disconnected"));
   con = GET_CONNECTED_SUBCHANNEL(c, no_barrier);
   if (con != nullptr) {
-    GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, con, "connection");
+    GRPC_CONNECTED_SUBCHANNEL_UNREF(con, "connection");
     gpr_atm_no_barrier_store(&c->connected_subchannel, (gpr_atm)0xdeadbeef);
   }
   gpr_mu_unlock(&c->mu);
 }
 
-void grpc_subchannel_unref(grpc_exec_ctx* exec_ctx,
-                           grpc_subchannel* c GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
+void grpc_subchannel_unref(grpc_subchannel* c GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
   gpr_atm old_refs;
   // add a weak ref and subtract a strong ref (atomically)
   old_refs = ref_mutate(c, (gpr_atm)1 - (gpr_atm)(1 << INTERNAL_REF_BITS),
                         1 REF_MUTATE_PURPOSE("STRONG_UNREF"));
   if ((old_refs & STRONG_REF_MASK) == (1 << INTERNAL_REF_BITS)) {
-    disconnect(exec_ctx, c);
+    disconnect(c);
   }
-  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "strong-unref");
+  GRPC_SUBCHANNEL_WEAK_UNREF(c, "strong-unref");
 }
 
-void grpc_subchannel_weak_unref(grpc_exec_ctx* exec_ctx,
-                                grpc_subchannel* c
-                                    GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
+void grpc_subchannel_weak_unref(
+    grpc_subchannel* c GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
   gpr_atm old_refs;
   old_refs = ref_mutate(c, -(gpr_atm)1, 1 REF_MUTATE_PURPOSE("WEAK_UNREF"));
   if (old_refs == 1) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_CREATE(subchannel_destroy, c, grpc_schedule_on_exec_ctx),
         GRPC_ERROR_NONE);
   }
@@ -335,17 +326,16 @@ static void parse_args_for_backoff_values(
       .set_max_backoff(max_backoff_ms);
 }
 
-grpc_subchannel* grpc_subchannel_create(grpc_exec_ctx* exec_ctx,
-                                        grpc_connector* connector,
+grpc_subchannel* grpc_subchannel_create(grpc_connector* connector,
                                         const grpc_subchannel_args* args) {
   grpc_subchannel_key* key = grpc_subchannel_key_create(args);
-  grpc_subchannel* c = grpc_subchannel_index_find(exec_ctx, key);
+  grpc_subchannel* c = grpc_subchannel_index_find(key);
   if (c) {
-    grpc_subchannel_key_destroy(exec_ctx, key);
+    grpc_subchannel_key_destroy(key);
     return c;
   }
 
-  GRPC_STATS_INC_CLIENT_SUBCHANNELS_CREATED(exec_ctx);
+  GRPC_STATS_INC_CLIENT_SUBCHANNELS_CREATED();
   c = (grpc_subchannel*)gpr_zalloc(sizeof(*c));
   c->key = key;
   gpr_atm_no_barrier_store(&c->ref_pair, 1 << INTERNAL_REF_BITS);
@@ -363,10 +353,10 @@ grpc_subchannel* grpc_subchannel_create(grpc_exec_ctx* exec_ctx,
   c->pollset_set = grpc_pollset_set_create();
   grpc_resolved_address* addr =
       (grpc_resolved_address*)gpr_malloc(sizeof(*addr));
-  grpc_get_subchannel_address_arg(exec_ctx, args->args, addr);
+  grpc_get_subchannel_address_arg(args->args, addr);
   grpc_resolved_address* new_address = nullptr;
   grpc_channel_args* new_args = nullptr;
-  if (grpc_proxy_mappers_map_address(exec_ctx, addr, args->args, &new_address,
+  if (grpc_proxy_mappers_map_address(addr, args->args, &new_address,
                                      &new_args)) {
     GPR_ASSERT(new_address != nullptr);
     gpr_free(addr);
@@ -379,7 +369,7 @@ grpc_subchannel* grpc_subchannel_create(grpc_exec_ctx* exec_ctx,
       new_args != nullptr ? new_args : args->args, keys_to_remove,
       GPR_ARRAY_SIZE(keys_to_remove), &new_arg, 1);
   gpr_free(new_arg.value.string);
-  if (new_args != nullptr) grpc_channel_args_destroy(exec_ctx, new_args);
+  if (new_args != nullptr) grpc_channel_args_destroy(new_args);
   c->root_external_state_watcher.next = c->root_external_state_watcher.prev =
       &c->root_external_state_watcher;
   GRPC_CLOSURE_INIT(&c->connected, subchannel_connected, c,
@@ -392,21 +382,19 @@ grpc_subchannel* grpc_subchannel_create(grpc_exec_ctx* exec_ctx,
   c->backoff.Init(backoff_options);
   gpr_mu_init(&c->mu);
 
-  return grpc_subchannel_index_register(exec_ctx, key, c);
+  return grpc_subchannel_index_register(key, c);
 }
 
-static void continue_connect_locked(grpc_exec_ctx* exec_ctx,
-                                    grpc_subchannel* c) {
+static void continue_connect_locked(grpc_subchannel* c) {
   grpc_connect_in_args args;
   args.interested_parties = c->pollset_set;
   const grpc_millis min_deadline =
-      c->min_connect_timeout_ms + grpc_exec_ctx_now(exec_ctx);
+      c->min_connect_timeout_ms + grpc_core::ExecCtx::Get()->Now();
   args.deadline = std::max(c->next_attempt_deadline, min_deadline);
   args.channel_args = c->args;
-  grpc_connectivity_state_set(exec_ctx, &c->state_tracker,
-                              GRPC_CHANNEL_CONNECTING, GRPC_ERROR_NONE,
-                              "state_change");
-  grpc_connector_connect(exec_ctx, c->connector, &args, &c->connecting_result,
+  grpc_connectivity_state_set(&c->state_tracker, GRPC_CHANNEL_CONNECTING,
+                              GRPC_ERROR_NONE, "state_change");
+  grpc_connector_connect(c->connector, &args, &c->connecting_result,
                          &c->connected);
 }
 
@@ -419,24 +407,23 @@ grpc_connectivity_state grpc_subchannel_check_connectivity(grpc_subchannel* c,
   return state;
 }
 
-static void on_external_state_watcher_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void on_external_state_watcher_done(void* arg, grpc_error* error) {
   external_state_watcher* w = (external_state_watcher*)arg;
   grpc_closure* follow_up = w->notify;
   if (w->pollset_set != nullptr) {
-    grpc_pollset_set_del_pollset_set(exec_ctx, w->subchannel->pollset_set,
+    grpc_pollset_set_del_pollset_set(w->subchannel->pollset_set,
                                      w->pollset_set);
   }
   gpr_mu_lock(&w->subchannel->mu);
   w->next->prev = w->prev;
   w->prev->next = w->next;
   gpr_mu_unlock(&w->subchannel->mu);
-  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, w->subchannel, "external_state_watcher");
+  GRPC_SUBCHANNEL_WEAK_UNREF(w->subchannel, "external_state_watcher");
   gpr_free(w);
-  GRPC_CLOSURE_RUN(exec_ctx, follow_up, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(follow_up, GRPC_ERROR_REF(error));
 }
 
-static void on_alarm(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_alarm(void* arg, grpc_error* error) {
   grpc_subchannel* c = (grpc_subchannel*)arg;
   gpr_mu_lock(&c->mu);
   c->have_alarm = false;
@@ -448,18 +435,17 @@ static void on_alarm(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
   }
   if (error == GRPC_ERROR_NONE) {
     gpr_log(GPR_INFO, "Failed to connect to channel, retrying");
-    c->next_attempt_deadline = c->backoff->Step(exec_ctx);
-    continue_connect_locked(exec_ctx, c);
+    c->next_attempt_deadline = c->backoff->Step();
+    continue_connect_locked(c);
     gpr_mu_unlock(&c->mu);
   } else {
     gpr_mu_unlock(&c->mu);
-    GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
+    GRPC_SUBCHANNEL_WEAK_UNREF(c, "connecting");
   }
   GRPC_ERROR_UNREF(error);
 }
 
-static void maybe_start_connecting_locked(grpc_exec_ctx* exec_ctx,
-                                          grpc_subchannel* c) {
+static void maybe_start_connecting_locked(grpc_subchannel* c) {
   if (c->disconnected) {
     /* Don't try to connect if we're already disconnected */
     return;
@@ -485,28 +471,26 @@ static void maybe_start_connecting_locked(grpc_exec_ctx* exec_ctx,
 
   if (!c->backoff_begun) {
     c->backoff_begun = true;
-    c->next_attempt_deadline = c->backoff->Begin(exec_ctx);
-    continue_connect_locked(exec_ctx, c);
+    c->next_attempt_deadline = c->backoff->Begin();
+    continue_connect_locked(c);
   } else {
     GPR_ASSERT(!c->have_alarm);
     c->have_alarm = true;
     const grpc_millis time_til_next =
-        c->next_attempt_deadline - grpc_exec_ctx_now(exec_ctx);
+        c->next_attempt_deadline - grpc_core::ExecCtx::Get()->Now();
     if (time_til_next <= 0) {
       gpr_log(GPR_INFO, "Retry immediately");
     } else {
       gpr_log(GPR_INFO, "Retry in %" PRIdPTR " milliseconds", time_til_next);
     }
     GRPC_CLOSURE_INIT(&c->on_alarm, on_alarm, c, grpc_schedule_on_exec_ctx);
-    grpc_timer_init(exec_ctx, &c->alarm, c->next_attempt_deadline,
-                    &c->on_alarm);
+    grpc_timer_init(&c->alarm, c->next_attempt_deadline, &c->on_alarm);
   }
 }
 
 void grpc_subchannel_notify_on_state_change(
-    grpc_exec_ctx* exec_ctx, grpc_subchannel* c,
-    grpc_pollset_set* interested_parties, grpc_connectivity_state* state,
-    grpc_closure* notify) {
+    grpc_subchannel* c, grpc_pollset_set* interested_parties,
+    grpc_connectivity_state* state, grpc_closure* notify) {
   external_state_watcher* w;
 
   if (state == nullptr) {
@@ -514,8 +498,8 @@ void grpc_subchannel_notify_on_state_change(
     for (w = c->root_external_state_watcher.next;
          w != &c->root_external_state_watcher; w = w->next) {
       if (w->notify == notify) {
-        grpc_connectivity_state_notify_on_state_change(
-            exec_ctx, &c->state_tracker, nullptr, &w->closure);
+        grpc_connectivity_state_notify_on_state_change(&c->state_tracker,
+                                                       nullptr, &w->closure);
       }
     }
     gpr_mu_unlock(&c->mu);
@@ -527,31 +511,28 @@ void grpc_subchannel_notify_on_state_change(
     GRPC_CLOSURE_INIT(&w->closure, on_external_state_watcher_done, w,
                       grpc_schedule_on_exec_ctx);
     if (interested_parties != nullptr) {
-      grpc_pollset_set_add_pollset_set(exec_ctx, c->pollset_set,
-                                       interested_parties);
+      grpc_pollset_set_add_pollset_set(c->pollset_set, interested_parties);
     }
     GRPC_SUBCHANNEL_WEAK_REF(c, "external_state_watcher");
     gpr_mu_lock(&c->mu);
     w->next = &c->root_external_state_watcher;
     w->prev = w->next->prev;
     w->next->prev = w->prev->next = w;
-    grpc_connectivity_state_notify_on_state_change(exec_ctx, &c->state_tracker,
-                                                   state, &w->closure);
-    maybe_start_connecting_locked(exec_ctx, c);
+    grpc_connectivity_state_notify_on_state_change(&c->state_tracker, state,
+                                                   &w->closure);
+    maybe_start_connecting_locked(c);
     gpr_mu_unlock(&c->mu);
   }
 }
 
 void grpc_connected_subchannel_process_transport_op(
-    grpc_exec_ctx* exec_ctx, grpc_connected_subchannel* con,
-    grpc_transport_op* op) {
+    grpc_connected_subchannel* con, grpc_transport_op* op) {
   grpc_channel_stack* channel_stack = CHANNEL_STACK_FROM_CONNECTION(con);
   grpc_channel_element* top_elem = grpc_channel_stack_element(channel_stack, 0);
-  top_elem->filter->start_transport_op(exec_ctx, top_elem, op);
+  top_elem->filter->start_transport_op(top_elem, op);
 }
 
-static void subchannel_on_child_state_changed(grpc_exec_ctx* exec_ctx, void* p,
-                                              grpc_error* error) {
+static void subchannel_on_child_state_changed(void* p, grpc_error* error) {
   state_watcher* sw = (state_watcher*)p;
   grpc_subchannel* c = sw->subchannel;
   gpr_mu* mu = &c->mu;
@@ -563,24 +544,22 @@ static void subchannel_on_child_state_changed(grpc_exec_ctx* exec_ctx, void* p,
     /* any errors on a subchannel ==> we're done, create a new one */
     sw->connectivity_state = GRPC_CHANNEL_SHUTDOWN;
   }
-  grpc_connectivity_state_set(exec_ctx, &c->state_tracker,
-                              sw->connectivity_state, GRPC_ERROR_REF(error),
-                              "reflect_child");
+  grpc_connectivity_state_set(&c->state_tracker, sw->connectivity_state,
+                              GRPC_ERROR_REF(error), "reflect_child");
   if (sw->connectivity_state != GRPC_CHANNEL_SHUTDOWN) {
     grpc_connected_subchannel_notify_on_state_change(
-        exec_ctx, GET_CONNECTED_SUBCHANNEL(c, no_barrier), nullptr,
+        GET_CONNECTED_SUBCHANNEL(c, no_barrier), nullptr,
         &sw->connectivity_state, &sw->closure);
     GRPC_SUBCHANNEL_WEAK_REF(c, "state_watcher");
     sw = nullptr;
   }
 
   gpr_mu_unlock(mu);
-  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "state_watcher");
+  GRPC_SUBCHANNEL_WEAK_UNREF(c, "state_watcher");
   gpr_free(sw);
 }
 
-static void connected_subchannel_state_op(grpc_exec_ctx* exec_ctx,
-                                          grpc_connected_subchannel* con,
+static void connected_subchannel_state_op(grpc_connected_subchannel* con,
                                           grpc_pollset_set* interested_parties,
                                           grpc_connectivity_state* state,
                                           grpc_closure* closure) {
@@ -590,29 +569,27 @@ static void connected_subchannel_state_op(grpc_exec_ctx* exec_ctx,
   op->on_connectivity_state_change = closure;
   op->bind_pollset_set = interested_parties;
   elem = grpc_channel_stack_element(CHANNEL_STACK_FROM_CONNECTION(con), 0);
-  elem->filter->start_transport_op(exec_ctx, elem, op);
+  elem->filter->start_transport_op(elem, op);
 }
 
 void grpc_connected_subchannel_notify_on_state_change(
-    grpc_exec_ctx* exec_ctx, grpc_connected_subchannel* con,
-    grpc_pollset_set* interested_parties, grpc_connectivity_state* state,
-    grpc_closure* closure) {
-  connected_subchannel_state_op(exec_ctx, con, interested_parties, state,
-                                closure);
+    grpc_connected_subchannel* con, grpc_pollset_set* interested_parties,
+    grpc_connectivity_state* state, grpc_closure* closure) {
+  connected_subchannel_state_op(con, interested_parties, state, closure);
 }
 
-void grpc_connected_subchannel_ping(grpc_exec_ctx* exec_ctx,
-                                    grpc_connected_subchannel* con,
-                                    grpc_closure* closure) {
+void grpc_connected_subchannel_ping(grpc_connected_subchannel* con,
+                                    grpc_closure* on_initiate,
+                                    grpc_closure* on_ack) {
   grpc_transport_op* op = grpc_make_transport_op(nullptr);
   grpc_channel_element* elem;
-  op->send_ping = closure;
+  op->send_ping.on_initiate = on_initiate;
+  op->send_ping.on_ack = on_ack;
   elem = grpc_channel_stack_element(CHANNEL_STACK_FROM_CONNECTION(con), 0);
-  elem->filter->start_transport_op(exec_ctx, elem, op);
+  elem->filter->start_transport_op(elem, op);
 }
 
-static bool publish_transport_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_subchannel* c) {
+static bool publish_transport_locked(grpc_subchannel* c) {
   grpc_connected_subchannel* con;
   grpc_channel_stack* stk;
   state_watcher* sw_subchannel;
@@ -620,19 +597,18 @@ static bool publish_transport_locked(grpc_exec_ctx* exec_ctx,
   /* construct channel stack */
   grpc_channel_stack_builder* builder = grpc_channel_stack_builder_create();
   grpc_channel_stack_builder_set_channel_arguments(
-      exec_ctx, builder, c->connecting_result.channel_args);
+      builder, c->connecting_result.channel_args);
   grpc_channel_stack_builder_set_transport(builder,
                                            c->connecting_result.transport);
 
-  if (!grpc_channel_init_create_stack(exec_ctx, builder,
-                                      GRPC_CLIENT_SUBCHANNEL)) {
-    grpc_channel_stack_builder_destroy(exec_ctx, builder);
+  if (!grpc_channel_init_create_stack(builder, GRPC_CLIENT_SUBCHANNEL)) {
+    grpc_channel_stack_builder_destroy(builder);
     return false;
   }
   grpc_error* error = grpc_channel_stack_builder_finish(
-      exec_ctx, builder, 0, 1, connection_destroy, nullptr, (void**)&con);
+      builder, 0, 1, connection_destroy, nullptr, (void**)&con);
   if (error != GRPC_ERROR_NONE) {
-    grpc_transport_destroy(exec_ctx, c->connecting_result.transport);
+    grpc_transport_destroy(c->connecting_result.transport);
     gpr_log(GPR_ERROR, "error initializing subchannel stack: %s",
             grpc_error_string(error));
     GRPC_ERROR_UNREF(error);
@@ -650,7 +626,7 @@ static bool publish_transport_locked(grpc_exec_ctx* exec_ctx,
 
   if (c->disconnected) {
     gpr_free(sw_subchannel);
-    grpc_channel_stack_destroy(exec_ctx, stk);
+    grpc_channel_stack_destroy(stk);
     gpr_free(con);
     return false;
   }
@@ -666,19 +642,18 @@ static bool publish_transport_locked(grpc_exec_ctx* exec_ctx,
   /* setup subchannel watching connected subchannel for changes; subchannel
      ref for connecting is donated to the state watcher */
   GRPC_SUBCHANNEL_WEAK_REF(c, "state_watcher");
-  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
+  GRPC_SUBCHANNEL_WEAK_UNREF(c, "connecting");
   grpc_connected_subchannel_notify_on_state_change(
-      exec_ctx, con, c->pollset_set, &sw_subchannel->connectivity_state,
+      con, c->pollset_set, &sw_subchannel->connectivity_state,
       &sw_subchannel->closure);
 
   /* signal completion */
-  grpc_connectivity_state_set(exec_ctx, &c->state_tracker, GRPC_CHANNEL_READY,
+  grpc_connectivity_state_set(&c->state_tracker, GRPC_CHANNEL_READY,
                               GRPC_ERROR_NONE, "connected");
   return true;
 }
 
-static void subchannel_connected(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void subchannel_connected(void* arg, grpc_error* error) {
   grpc_subchannel* c = (grpc_subchannel*)arg;
   grpc_channel_args* delete_channel_args = c->connecting_result.channel_args;
 
@@ -686,13 +661,13 @@ static void subchannel_connected(grpc_exec_ctx* exec_ctx, void* arg,
   gpr_mu_lock(&c->mu);
   c->connecting = false;
   if (c->connecting_result.transport != nullptr &&
-      publish_transport_locked(exec_ctx, c)) {
+      publish_transport_locked(c)) {
     /* do nothing, transport was published */
   } else if (c->disconnected) {
-    GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
+    GRPC_SUBCHANNEL_WEAK_UNREF(c, "connecting");
   } else {
     grpc_connectivity_state_set(
-        exec_ctx, &c->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+        &c->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
         grpc_error_set_int(GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                                "Connect Failed", &error, 1),
                            GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE),
@@ -701,27 +676,26 @@ static void subchannel_connected(grpc_exec_ctx* exec_ctx, void* arg,
     const char* errmsg = grpc_error_string(error);
     gpr_log(GPR_INFO, "Connect failed: %s", errmsg);
 
-    maybe_start_connecting_locked(exec_ctx, c);
-    GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
+    maybe_start_connecting_locked(c);
+    GRPC_SUBCHANNEL_WEAK_UNREF(c, "connecting");
   }
   gpr_mu_unlock(&c->mu);
-  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connected");
-  grpc_channel_args_destroy(exec_ctx, delete_channel_args);
+  GRPC_SUBCHANNEL_WEAK_UNREF(c, "connected");
+  grpc_channel_args_destroy(delete_channel_args);
 }
 
 /*
  * grpc_subchannel_call implementation
  */
 
-static void subchannel_call_destroy(grpc_exec_ctx* exec_ctx, void* call,
-                                    grpc_error* error) {
+static void subchannel_call_destroy(void* call, grpc_error* error) {
   grpc_subchannel_call* c = (grpc_subchannel_call*)call;
   GPR_ASSERT(c->schedule_closure_after_destroy != nullptr);
   GPR_TIMER_BEGIN("grpc_subchannel_call_unref.destroy", 0);
   grpc_connected_subchannel* connection = c->connection;
-  grpc_call_stack_destroy(exec_ctx, SUBCHANNEL_CALL_TO_CALL_STACK(c), nullptr,
+  grpc_call_stack_destroy(SUBCHANNEL_CALL_TO_CALL_STACK(c), nullptr,
                           c->schedule_closure_after_destroy);
-  GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, connection, "subchannel_call");
+  GRPC_CONNECTED_SUBCHANNEL_UNREF(connection, "subchannel_call");
   GPR_TIMER_END("grpc_subchannel_call_unref.destroy", 0);
 }
 
@@ -737,20 +711,18 @@ void grpc_subchannel_call_ref(
   GRPC_CALL_STACK_REF(SUBCHANNEL_CALL_TO_CALL_STACK(c), REF_REASON);
 }
 
-void grpc_subchannel_call_unref(grpc_exec_ctx* exec_ctx,
-                                grpc_subchannel_call* c
-                                    GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
-  GRPC_CALL_STACK_UNREF(exec_ctx, SUBCHANNEL_CALL_TO_CALL_STACK(c), REF_REASON);
+void grpc_subchannel_call_unref(
+    grpc_subchannel_call* c GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
+  GRPC_CALL_STACK_UNREF(SUBCHANNEL_CALL_TO_CALL_STACK(c), REF_REASON);
 }
 
-void grpc_subchannel_call_process_op(grpc_exec_ctx* exec_ctx,
-                                     grpc_subchannel_call* call,
+void grpc_subchannel_call_process_op(grpc_subchannel_call* call,
                                      grpc_transport_stream_op_batch* batch) {
   GPR_TIMER_BEGIN("grpc_subchannel_call_process_op", 0);
   grpc_call_stack* call_stack = SUBCHANNEL_CALL_TO_CALL_STACK(call);
   grpc_call_element* top_elem = grpc_call_stack_element(call_stack, 0);
   GRPC_CALL_LOG_OP(GPR_INFO, top_elem, batch);
-  top_elem->filter->start_transport_stream_op_batch(exec_ctx, top_elem, batch);
+  top_elem->filter->start_transport_stream_op_batch(top_elem, batch);
   GPR_TIMER_END("grpc_subchannel_call_process_op", 0);
 }
 
@@ -765,7 +737,7 @@ const grpc_subchannel_key* grpc_subchannel_get_key(
 }
 
 grpc_error* grpc_connected_subchannel_create_call(
-    grpc_exec_ctx* exec_ctx, grpc_connected_subchannel* con,
+    grpc_connected_subchannel* con,
     const grpc_connected_subchannel_call_args* args,
     grpc_subchannel_call** call) {
   grpc_channel_stack* chanstk = CHANNEL_STACK_FROM_CONNECTION(con);
@@ -783,14 +755,14 @@ grpc_error* grpc_connected_subchannel_create_call(
       args->arena,        /* arena */
       args->call_combiner /* call_combiner */
   };
-  grpc_error* error = grpc_call_stack_init(
-      exec_ctx, chanstk, 1, subchannel_call_destroy, *call, &call_args);
+  grpc_error* error = grpc_call_stack_init(chanstk, 1, subchannel_call_destroy,
+                                           *call, &call_args);
   if (error != GRPC_ERROR_NONE) {
     const char* error_string = grpc_error_string(error);
     gpr_log(GPR_ERROR, "error: %s", error_string);
     return error;
   }
-  grpc_call_stack_set_pollset_or_pollset_set(exec_ctx, callstk, args->pollent);
+  grpc_call_stack_set_pollset_or_pollset_set(callstk, args->pollent);
   return GRPC_ERROR_NONE;
 }
 
@@ -799,21 +771,20 @@ grpc_call_stack* grpc_subchannel_call_get_call_stack(
   return SUBCHANNEL_CALL_TO_CALL_STACK(subchannel_call);
 }
 
-static void grpc_uri_to_sockaddr(grpc_exec_ctx* exec_ctx, const char* uri_str,
+static void grpc_uri_to_sockaddr(const char* uri_str,
                                  grpc_resolved_address* addr) {
-  grpc_uri* uri = grpc_uri_parse(exec_ctx, uri_str, 0 /* suppress_errors */);
+  grpc_uri* uri = grpc_uri_parse(uri_str, 0 /* suppress_errors */);
   GPR_ASSERT(uri != nullptr);
   if (!grpc_parse_uri(uri, addr)) memset(addr, 0, sizeof(*addr));
   grpc_uri_destroy(uri);
 }
 
-void grpc_get_subchannel_address_arg(grpc_exec_ctx* exec_ctx,
-                                     const grpc_channel_args* args,
+void grpc_get_subchannel_address_arg(const grpc_channel_args* args,
                                      grpc_resolved_address* addr) {
   const char* addr_uri_str = grpc_get_subchannel_address_uri_arg(args);
   memset(addr, 0, sizeof(*addr));
   if (*addr_uri_str != '\0') {
-    grpc_uri_to_sockaddr(exec_ctx, addr_uri_str, addr);
+    grpc_uri_to_sockaddr(addr_uri_str, addr);
   }
 }
 
diff --git a/src/core/ext/filters/client_channel/subchannel.h b/src/core/ext/filters/client_channel/subchannel.h
index 1f326fc1d2..9d34fff07a 100644
--- a/src/core/ext/filters/client_channel/subchannel.h
+++ b/src/core/ext/filters/client_channel/subchannel.h
@@ -42,36 +42,34 @@ typedef struct grpc_subchannel_key grpc_subchannel_key;
   grpc_subchannel_ref((p), __FILE__, __LINE__, (r))
 #define GRPC_SUBCHANNEL_REF_FROM_WEAK_REF(p, r) \
   grpc_subchannel_ref_from_weak_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_SUBCHANNEL_UNREF(cl, p, r) \
-  grpc_subchannel_unref((cl), (p), __FILE__, __LINE__, (r))
+#define GRPC_SUBCHANNEL_UNREF(p, r) \
+  grpc_subchannel_unref((p), __FILE__, __LINE__, (r))
 #define GRPC_SUBCHANNEL_WEAK_REF(p, r) \
   grpc_subchannel_weak_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_SUBCHANNEL_WEAK_UNREF(cl, p, r) \
-  grpc_subchannel_weak_unref((cl), (p), __FILE__, __LINE__, (r))
+#define GRPC_SUBCHANNEL_WEAK_UNREF(p, r) \
+  grpc_subchannel_weak_unref((p), __FILE__, __LINE__, (r))
 #define GRPC_CONNECTED_SUBCHANNEL_REF(p, r) \
   grpc_connected_subchannel_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_CONNECTED_SUBCHANNEL_UNREF(cl, p, r) \
-  grpc_connected_subchannel_unref((cl), (p), __FILE__, __LINE__, (r))
+#define GRPC_CONNECTED_SUBCHANNEL_UNREF(p, r) \
+  grpc_connected_subchannel_unref((p), __FILE__, __LINE__, (r))
 #define GRPC_SUBCHANNEL_CALL_REF(p, r) \
   grpc_subchannel_call_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_SUBCHANNEL_CALL_UNREF(cl, p, r) \
-  grpc_subchannel_call_unref((cl), (p), __FILE__, __LINE__, (r))
+#define GRPC_SUBCHANNEL_CALL_UNREF(p, r) \
+  grpc_subchannel_call_unref((p), __FILE__, __LINE__, (r))
 #define GRPC_SUBCHANNEL_REF_EXTRA_ARGS \
   , const char *file, int line, const char *reason
 #else
 #define GRPC_SUBCHANNEL_REF(p, r) grpc_subchannel_ref((p))
 #define GRPC_SUBCHANNEL_REF_FROM_WEAK_REF(p, r) \
   grpc_subchannel_ref_from_weak_ref((p))
-#define GRPC_SUBCHANNEL_UNREF(cl, p, r) grpc_subchannel_unref((cl), (p))
+#define GRPC_SUBCHANNEL_UNREF(p, r) grpc_subchannel_unref((p))
 #define GRPC_SUBCHANNEL_WEAK_REF(p, r) grpc_subchannel_weak_ref((p))
-#define GRPC_SUBCHANNEL_WEAK_UNREF(cl, p, r) \
-  grpc_subchannel_weak_unref((cl), (p))
+#define GRPC_SUBCHANNEL_WEAK_UNREF(p, r) grpc_subchannel_weak_unref((p))
 #define GRPC_CONNECTED_SUBCHANNEL_REF(p, r) grpc_connected_subchannel_ref((p))
-#define GRPC_CONNECTED_SUBCHANNEL_UNREF(cl, p, r) \
-  grpc_connected_subchannel_unref((cl), (p))
+#define GRPC_CONNECTED_SUBCHANNEL_UNREF(p, r) \
+  grpc_connected_subchannel_unref((p))
 #define GRPC_SUBCHANNEL_CALL_REF(p, r) grpc_subchannel_call_ref((p))
-#define GRPC_SUBCHANNEL_CALL_UNREF(cl, p, r) \
-  grpc_subchannel_call_unref((cl), (p))
+#define GRPC_SUBCHANNEL_CALL_UNREF(p, r) grpc_subchannel_call_unref((p))
 #define GRPC_SUBCHANNEL_REF_EXTRA_ARGS
 #endif
 
@@ -79,24 +77,20 @@ grpc_subchannel* grpc_subchannel_ref(
     grpc_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
 grpc_subchannel* grpc_subchannel_ref_from_weak_ref(
     grpc_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
-void grpc_subchannel_unref(grpc_exec_ctx* exec_ctx,
-                           grpc_subchannel* channel
-                               GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
+void grpc_subchannel_unref(
+    grpc_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
 grpc_subchannel* grpc_subchannel_weak_ref(
     grpc_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
-void grpc_subchannel_weak_unref(grpc_exec_ctx* exec_ctx,
-                                grpc_subchannel* channel
-                                    GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
+void grpc_subchannel_weak_unref(
+    grpc_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
 grpc_connected_subchannel* grpc_connected_subchannel_ref(
     grpc_connected_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
-void grpc_connected_subchannel_unref(grpc_exec_ctx* exec_ctx,
-                                     grpc_connected_subchannel* channel
-                                         GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
+void grpc_connected_subchannel_unref(
+    grpc_connected_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
 void grpc_subchannel_call_ref(
     grpc_subchannel_call* call GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
-void grpc_subchannel_call_unref(grpc_exec_ctx* exec_ctx,
-                                grpc_subchannel_call* call
-                                    GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
+void grpc_subchannel_call_unref(
+    grpc_subchannel_call* call GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
 
 /** construct a subchannel call */
 typedef struct {
@@ -110,14 +104,13 @@ typedef struct {
 } grpc_connected_subchannel_call_args;
 
 grpc_error* grpc_connected_subchannel_create_call(
-    grpc_exec_ctx* exec_ctx, grpc_connected_subchannel* connected_subchannel,
+    grpc_connected_subchannel* connected_subchannel,
     const grpc_connected_subchannel_call_args* args,
     grpc_subchannel_call** subchannel_call);
 
 /** process a transport level op */
 void grpc_connected_subchannel_process_transport_op(
-    grpc_exec_ctx* exec_ctx, grpc_connected_subchannel* subchannel,
-    grpc_transport_op* op);
+    grpc_connected_subchannel* subchannel, grpc_transport_op* op);
 
 /** poll the current connectivity state of a channel */
 grpc_connectivity_state grpc_subchannel_check_connectivity(
@@ -126,16 +119,14 @@ grpc_connectivity_state grpc_subchannel_check_connectivity(
 /** Calls notify when the connectivity state of a channel becomes different
     from *state.  Updates *state with the new state of the channel. */
 void grpc_subchannel_notify_on_state_change(
-    grpc_exec_ctx* exec_ctx, grpc_subchannel* channel,
-    grpc_pollset_set* interested_parties, grpc_connectivity_state* state,
-    grpc_closure* notify);
+    grpc_subchannel* channel, grpc_pollset_set* interested_parties,
+    grpc_connectivity_state* state, grpc_closure* notify);
 void grpc_connected_subchannel_notify_on_state_change(
-    grpc_exec_ctx* exec_ctx, grpc_connected_subchannel* channel,
-    grpc_pollset_set* interested_parties, grpc_connectivity_state* state,
-    grpc_closure* notify);
-void grpc_connected_subchannel_ping(grpc_exec_ctx* exec_ctx,
-                                    grpc_connected_subchannel* channel,
-                                    grpc_closure* notify);
+    grpc_connected_subchannel* channel, grpc_pollset_set* interested_parties,
+    grpc_connectivity_state* state, grpc_closure* notify);
+void grpc_connected_subchannel_ping(grpc_connected_subchannel* channel,
+                                    grpc_closure* on_initiate,
+                                    grpc_closure* on_ack);
 
 /** retrieve the grpc_connected_subchannel - or NULL if called before
     the subchannel becomes connected */
@@ -147,8 +138,7 @@ const grpc_subchannel_key* grpc_subchannel_get_key(
     const grpc_subchannel* subchannel);
 
 /** continue processing a transport op */
-void grpc_subchannel_call_process_op(grpc_exec_ctx* exec_ctx,
-                                     grpc_subchannel_call* subchannel_call,
+void grpc_subchannel_call_process_op(grpc_subchannel_call* subchannel_call,
                                      grpc_transport_stream_op_batch* op);
 
 /** Must be called once per call. Sets the 'then_schedule_closure' argument for
@@ -172,13 +162,11 @@ struct grpc_subchannel_args {
 };
 
 /** create a subchannel given a connector */
-grpc_subchannel* grpc_subchannel_create(grpc_exec_ctx* exec_ctx,
-                                        grpc_connector* connector,
+grpc_subchannel* grpc_subchannel_create(grpc_connector* connector,
                                         const grpc_subchannel_args* args);
 
 /// Sets \a addr from \a args.
-void grpc_get_subchannel_address_arg(grpc_exec_ctx* exec_ctx,
-                                     const grpc_channel_args* args,
+void grpc_get_subchannel_address_arg(const grpc_channel_args* args,
                                      grpc_resolved_address* addr);
 
 /// Returns the URI string for the address to connect to.
diff --git a/src/core/ext/filters/client_channel/subchannel_index.cc b/src/core/ext/filters/client_channel/subchannel_index.cc
index 1624643d0b..052b047f43 100644
--- a/src/core/ext/filters/client_channel/subchannel_index.cc
+++ b/src/core/ext/filters/client_channel/subchannel_index.cc
@@ -81,16 +81,14 @@ int grpc_subchannel_key_compare(const grpc_subchannel_key* a,
   return grpc_channel_args_compare(a->args.args, b->args.args);
 }
 
-void grpc_subchannel_key_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_subchannel_key* k) {
+void grpc_subchannel_key_destroy(grpc_subchannel_key* k) {
   gpr_free((grpc_channel_args*)k->args.filters);
-  grpc_channel_args_destroy(exec_ctx, (grpc_channel_args*)k->args.args);
+  grpc_channel_args_destroy((grpc_channel_args*)k->args.args);
   gpr_free(k);
 }
 
 static void sck_avl_destroy(void* p, void* user_data) {
-  grpc_exec_ctx* exec_ctx = (grpc_exec_ctx*)user_data;
-  grpc_subchannel_key_destroy(exec_ctx, (grpc_subchannel_key*)p);
+  grpc_subchannel_key_destroy((grpc_subchannel_key*)p);
 }
 
 static void* sck_avl_copy(void* p, void* unused) {
@@ -103,8 +101,7 @@ static long sck_avl_compare(void* a, void* b, void* unused) {
 }
 
 static void scv_avl_destroy(void* p, void* user_data) {
-  grpc_exec_ctx* exec_ctx = (grpc_exec_ctx*)user_data;
-  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, (grpc_subchannel*)p, "subchannel_index");
+  GRPC_SUBCHANNEL_WEAK_UNREF((grpc_subchannel*)p, "subchannel_index");
 }
 
 static void* scv_avl_copy(void* p, void* unused) {
@@ -135,32 +132,29 @@ void grpc_subchannel_index_shutdown(void) {
 
 void grpc_subchannel_index_unref(void) {
   if (gpr_unref(&g_refcount)) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
     gpr_mu_destroy(&g_mu);
-    gpr_avl_unref(g_subchannel_index, &exec_ctx);
-    grpc_exec_ctx_finish(&exec_ctx);
+    gpr_avl_unref(g_subchannel_index, grpc_core::ExecCtx::Get());
   }
 }
 
 void grpc_subchannel_index_ref(void) { gpr_ref_non_zero(&g_refcount); }
 
-grpc_subchannel* grpc_subchannel_index_find(grpc_exec_ctx* exec_ctx,
-                                            grpc_subchannel_key* key) {
+grpc_subchannel* grpc_subchannel_index_find(grpc_subchannel_key* key) {
   // Lock, and take a reference to the subchannel index.
   // We don't need to do the search under a lock as avl's are immutable.
   gpr_mu_lock(&g_mu);
-  gpr_avl index = gpr_avl_ref(g_subchannel_index, exec_ctx);
+  gpr_avl index = gpr_avl_ref(g_subchannel_index, grpc_core::ExecCtx::Get());
   gpr_mu_unlock(&g_mu);
 
   grpc_subchannel* c = GRPC_SUBCHANNEL_REF_FROM_WEAK_REF(
-      (grpc_subchannel*)gpr_avl_get(index, key, exec_ctx), "index_find");
-  gpr_avl_unref(index, exec_ctx);
+      (grpc_subchannel*)gpr_avl_get(index, key, grpc_core::ExecCtx::Get()),
+      "index_find");
+  gpr_avl_unref(index, grpc_core::ExecCtx::Get());
 
   return c;
 }
 
-grpc_subchannel* grpc_subchannel_index_register(grpc_exec_ctx* exec_ctx,
-                                                grpc_subchannel_key* key,
+grpc_subchannel* grpc_subchannel_index_register(grpc_subchannel_key* key,
                                                 grpc_subchannel* constructed) {
   grpc_subchannel* c = nullptr;
   bool need_to_unref_constructed = false;
@@ -171,11 +165,11 @@ grpc_subchannel* grpc_subchannel_index_register(grpc_exec_ctx* exec_ctx,
     // Compare and swap loop:
     // - take a reference to the current index
     gpr_mu_lock(&g_mu);
-    gpr_avl index = gpr_avl_ref(g_subchannel_index, exec_ctx);
+    gpr_avl index = gpr_avl_ref(g_subchannel_index, grpc_core::ExecCtx::Get());
     gpr_mu_unlock(&g_mu);
 
     // - Check to see if a subchannel already exists
-    c = (grpc_subchannel*)gpr_avl_get(index, key, exec_ctx);
+    c = (grpc_subchannel*)gpr_avl_get(index, key, grpc_core::ExecCtx::Get());
     if (c != nullptr) {
       c = GRPC_SUBCHANNEL_REF_FROM_WEAK_REF(c, "index_register");
     }
@@ -184,9 +178,11 @@ grpc_subchannel* grpc_subchannel_index_register(grpc_exec_ctx* exec_ctx,
       need_to_unref_constructed = true;
     } else {
       // no -> update the avl and compare/swap
-      gpr_avl updated = gpr_avl_add(
-          gpr_avl_ref(index, exec_ctx), subchannel_key_copy(key),
-          GRPC_SUBCHANNEL_WEAK_REF(constructed, "index_register"), exec_ctx);
+      gpr_avl updated =
+          gpr_avl_add(gpr_avl_ref(index, grpc_core::ExecCtx::Get()),
+                      subchannel_key_copy(key),
+                      GRPC_SUBCHANNEL_WEAK_REF(constructed, "index_register"),
+                      grpc_core::ExecCtx::Get());
 
       // it may happen (but it's expected to be unlikely)
       // that some other thread has changed the index:
@@ -198,41 +194,42 @@ grpc_subchannel* grpc_subchannel_index_register(grpc_exec_ctx* exec_ctx,
       }
       gpr_mu_unlock(&g_mu);
 
-      gpr_avl_unref(updated, exec_ctx);
+      gpr_avl_unref(updated, grpc_core::ExecCtx::Get());
     }
-    gpr_avl_unref(index, exec_ctx);
+    gpr_avl_unref(index, grpc_core::ExecCtx::Get());
   }
 
   if (need_to_unref_constructed) {
-    GRPC_SUBCHANNEL_UNREF(exec_ctx, constructed, "index_register");
+    GRPC_SUBCHANNEL_UNREF(constructed, "index_register");
   }
 
   return c;
 }
 
-void grpc_subchannel_index_unregister(grpc_exec_ctx* exec_ctx,
-                                      grpc_subchannel_key* key,
+void grpc_subchannel_index_unregister(grpc_subchannel_key* key,
                                       grpc_subchannel* constructed) {
   bool done = false;
   while (!done) {
     // Compare and swap loop:
     // - take a reference to the current index
     gpr_mu_lock(&g_mu);
-    gpr_avl index = gpr_avl_ref(g_subchannel_index, exec_ctx);
+    gpr_avl index = gpr_avl_ref(g_subchannel_index, grpc_core::ExecCtx::Get());
     gpr_mu_unlock(&g_mu);
 
     // Check to see if this key still refers to the previously
     // registered subchannel
-    grpc_subchannel* c = (grpc_subchannel*)gpr_avl_get(index, key, exec_ctx);
+    grpc_subchannel* c =
+        (grpc_subchannel*)gpr_avl_get(index, key, grpc_core::ExecCtx::Get());
     if (c != constructed) {
-      gpr_avl_unref(index, exec_ctx);
+      gpr_avl_unref(index, grpc_core::ExecCtx::Get());
       break;
     }
 
     // compare and swap the update (some other thread may have
     // mutated the index behind us)
     gpr_avl updated =
-        gpr_avl_remove(gpr_avl_ref(index, exec_ctx), key, exec_ctx);
+        gpr_avl_remove(gpr_avl_ref(index, grpc_core::ExecCtx::Get()), key,
+                       grpc_core::ExecCtx::Get());
 
     gpr_mu_lock(&g_mu);
     if (index.root == g_subchannel_index.root) {
@@ -241,8 +238,8 @@ void grpc_subchannel_index_unregister(grpc_exec_ctx* exec_ctx,
     }
     gpr_mu_unlock(&g_mu);
 
-    gpr_avl_unref(updated, exec_ctx);
-    gpr_avl_unref(index, exec_ctx);
+    gpr_avl_unref(updated, grpc_core::ExecCtx::Get());
+    gpr_avl_unref(index, grpc_core::ExecCtx::Get());
   }
 }
 
diff --git a/src/core/ext/filters/client_channel/subchannel_index.h b/src/core/ext/filters/client_channel/subchannel_index.h
index 6a4d06ef8f..bd160a3b13 100644
--- a/src/core/ext/filters/client_channel/subchannel_index.h
+++ b/src/core/ext/filters/client_channel/subchannel_index.h
@@ -29,26 +29,22 @@ grpc_subchannel_key* grpc_subchannel_key_create(
     const grpc_subchannel_args* args);
 
 /** Destroy a subchannel key */
-void grpc_subchannel_key_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_subchannel_key* key);
+void grpc_subchannel_key_destroy(grpc_subchannel_key* key);
 
 /** Given a subchannel key, find the subchannel registered for it.
     Returns NULL if no such channel exists.
     Thread-safe. */
-grpc_subchannel* grpc_subchannel_index_find(grpc_exec_ctx* exec_ctx,
-                                            grpc_subchannel_key* key);
+grpc_subchannel* grpc_subchannel_index_find(grpc_subchannel_key* key);
 
 /** Register a subchannel against a key.
     Takes ownership of \a constructed.
     Returns the registered subchannel. This may be different from
     \a constructed in the case of a registration race. */
-grpc_subchannel* grpc_subchannel_index_register(grpc_exec_ctx* exec_ctx,
-                                                grpc_subchannel_key* key,
+grpc_subchannel* grpc_subchannel_index_register(grpc_subchannel_key* key,
                                                 grpc_subchannel* constructed);
 
 /** Remove \a constructed as the registered subchannel for \a key. */
-void grpc_subchannel_index_unregister(grpc_exec_ctx* exec_ctx,
-                                      grpc_subchannel_key* key,
+void grpc_subchannel_index_unregister(grpc_subchannel_key* key,
                                       grpc_subchannel* constructed);
 
 int grpc_subchannel_key_compare(const grpc_subchannel_key* a,
diff --git a/src/core/ext/filters/client_channel/uri_parser.cc b/src/core/ext/filters/client_channel/uri_parser.cc
index b76dcbe4e3..3428f4b54c 100644
--- a/src/core/ext/filters/client_channel/uri_parser.cc
+++ b/src/core/ext/filters/client_channel/uri_parser.cc
@@ -56,8 +56,8 @@ static grpc_uri* bad_uri(const char* uri_text, size_t pos, const char* section,
 }
 
 /** Returns a copy of percent decoded \a src[begin, end) */
-static char* decode_and_copy_component(grpc_exec_ctx* exec_ctx, const char* src,
-                                       size_t begin, size_t end) {
+static char* decode_and_copy_component(const char* src, size_t begin,
+                                       size_t end) {
   grpc_slice component =
       (begin == NOT_SET || end == NOT_SET)
           ? grpc_empty_slice()
@@ -65,8 +65,8 @@ static char* decode_and_copy_component(grpc_exec_ctx* exec_ctx, const char* src,
   grpc_slice decoded_component =
       grpc_permissive_percent_decode_slice(component);
   char* out = grpc_dump_slice(decoded_component, GPR_DUMP_ASCII);
-  grpc_slice_unref_internal(exec_ctx, component);
-  grpc_slice_unref_internal(exec_ctx, decoded_component);
+  grpc_slice_unref_internal(component);
+  grpc_slice_unref_internal(decoded_component);
   return out;
 }
 
@@ -184,8 +184,7 @@ static void parse_query_parts(grpc_uri* uri) {
   }
 }
 
-grpc_uri* grpc_uri_parse(grpc_exec_ctx* exec_ctx, const char* uri_text,
-                         bool suppress_errors) {
+grpc_uri* grpc_uri_parse(const char* uri_text, bool suppress_errors) {
   grpc_uri* uri;
   size_t scheme_begin = 0;
   size_t scheme_end = NOT_SET;
@@ -273,16 +272,13 @@ grpc_uri* grpc_uri_parse(grpc_exec_ctx* exec_ctx, const char* uri_text,
   }
 
   uri = (grpc_uri*)gpr_zalloc(sizeof(*uri));
-  uri->scheme =
-      decode_and_copy_component(exec_ctx, uri_text, scheme_begin, scheme_end);
-  uri->authority = decode_and_copy_component(exec_ctx, uri_text,
-                                             authority_begin, authority_end);
-  uri->path =
-      decode_and_copy_component(exec_ctx, uri_text, path_begin, path_end);
-  uri->query =
-      decode_and_copy_component(exec_ctx, uri_text, query_begin, query_end);
-  uri->fragment = decode_and_copy_component(exec_ctx, uri_text, fragment_begin,
-                                            fragment_end);
+  uri->scheme = decode_and_copy_component(uri_text, scheme_begin, scheme_end);
+  uri->authority =
+      decode_and_copy_component(uri_text, authority_begin, authority_end);
+  uri->path = decode_and_copy_component(uri_text, path_begin, path_end);
+  uri->query = decode_and_copy_component(uri_text, query_begin, query_end);
+  uri->fragment =
+      decode_and_copy_component(uri_text, fragment_begin, fragment_end);
   parse_query_parts(uri);
 
   return uri;
diff --git a/src/core/ext/filters/client_channel/uri_parser.h b/src/core/ext/filters/client_channel/uri_parser.h
index 84752905e8..24ff06c0b5 100644
--- a/src/core/ext/filters/client_channel/uri_parser.h
+++ b/src/core/ext/filters/client_channel/uri_parser.h
@@ -37,8 +37,7 @@ typedef struct {
 } grpc_uri;
 
 /** parse a uri, return NULL on failure */
-grpc_uri* grpc_uri_parse(grpc_exec_ctx* exec_ctx, const char* uri_text,
-                         bool suppress_errors);
+grpc_uri* grpc_uri_parse(const char* uri_text, bool suppress_errors);
 
 /** return the part of a query string after the '=' in "?key=xxx&...", or NULL
  * if key is not present */
diff --git a/src/core/ext/filters/deadline/deadline_filter.cc b/src/core/ext/filters/deadline/deadline_filter.cc
index 5db7584a59..c430f3d2d4 100644
--- a/src/core/ext/filters/deadline/deadline_filter.cc
+++ b/src/core/ext/filters/deadline/deadline_filter.cc
@@ -36,18 +36,16 @@
 
 // The on_complete callback used when sending a cancel_error batch down the
 // filter stack.  Yields the call combiner when the batch returns.
-static void yield_call_combiner(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_error* ignored) {
+static void yield_call_combiner(void* arg, grpc_error* ignored) {
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)arg;
-  GRPC_CALL_COMBINER_STOP(exec_ctx, deadline_state->call_combiner,
+  GRPC_CALL_COMBINER_STOP(deadline_state->call_combiner,
                           "got on_complete from cancel_stream batch");
-  GRPC_CALL_STACK_UNREF(exec_ctx, deadline_state->call_stack, "deadline_timer");
+  GRPC_CALL_STACK_UNREF(deadline_state->call_stack, "deadline_timer");
 }
 
 // This is called via the call combiner, so access to deadline_state is
 // synchronized.
-static void send_cancel_op_in_call_combiner(grpc_exec_ctx* exec_ctx, void* arg,
-                                            grpc_error* error) {
+static void send_cancel_op_in_call_combiner(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
   grpc_transport_stream_op_batch* batch = grpc_make_transport_stream_op(
@@ -55,37 +53,34 @@ static void send_cancel_op_in_call_combiner(grpc_exec_ctx* exec_ctx, void* arg,
                         deadline_state, grpc_schedule_on_exec_ctx));
   batch->cancel_stream = true;
   batch->payload->cancel_stream.cancel_error = GRPC_ERROR_REF(error);
-  elem->filter->start_transport_stream_op_batch(exec_ctx, elem, batch);
+  elem->filter->start_transport_stream_op_batch(elem, batch);
 }
 
 // Timer callback.
-static void timer_callback(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
+static void timer_callback(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
   if (error != GRPC_ERROR_CANCELLED) {
     error = grpc_error_set_int(
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Deadline Exceeded"),
         GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_DEADLINE_EXCEEDED);
-    grpc_call_combiner_cancel(exec_ctx, deadline_state->call_combiner,
+    grpc_call_combiner_cancel(deadline_state->call_combiner,
                               GRPC_ERROR_REF(error));
     GRPC_CLOSURE_INIT(&deadline_state->timer_callback,
                       send_cancel_op_in_call_combiner, elem,
                       grpc_schedule_on_exec_ctx);
-    GRPC_CALL_COMBINER_START(exec_ctx, deadline_state->call_combiner,
+    GRPC_CALL_COMBINER_START(deadline_state->call_combiner,
                              &deadline_state->timer_callback, error,
                              "deadline exceeded -- sending cancel_stream op");
   } else {
-    GRPC_CALL_STACK_UNREF(exec_ctx, deadline_state->call_stack,
-                          "deadline_timer");
+    GRPC_CALL_STACK_UNREF(deadline_state->call_stack, "deadline_timer");
   }
 }
 
 // Starts the deadline timer.
 // This is called via the call combiner, so access to deadline_state is
 // synchronized.
-static void start_timer_if_needed(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static void start_timer_if_needed(grpc_call_element* elem,
                                   grpc_millis deadline) {
   if (deadline == GRPC_MILLIS_INF_FUTURE) {
     return;
@@ -113,17 +108,16 @@ static void start_timer_if_needed(grpc_exec_ctx* exec_ctx,
   }
   GPR_ASSERT(closure != nullptr);
   GRPC_CALL_STACK_REF(deadline_state->call_stack, "deadline_timer");
-  grpc_timer_init(exec_ctx, &deadline_state->timer, deadline, closure);
+  grpc_timer_init(&deadline_state->timer, deadline, closure);
 }
 
 // Cancels the deadline timer.
 // This is called via the call combiner, so access to deadline_state is
 // synchronized.
-static void cancel_timer_if_needed(grpc_exec_ctx* exec_ctx,
-                                   grpc_deadline_state* deadline_state) {
+static void cancel_timer_if_needed(grpc_deadline_state* deadline_state) {
   if (deadline_state->timer_state == GRPC_DEADLINE_STATE_PENDING) {
     deadline_state->timer_state = GRPC_DEADLINE_STATE_FINISHED;
-    grpc_timer_cancel(exec_ctx, &deadline_state->timer);
+    grpc_timer_cancel(&deadline_state->timer);
   } else {
     // timer was either in STATE_INITAL (nothing to cancel)
     // OR in STATE_FINISHED (again nothing to cancel)
@@ -131,12 +125,11 @@ static void cancel_timer_if_needed(grpc_exec_ctx* exec_ctx,
 }
 
 // Callback run when the call is complete.
-static void on_complete(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_complete(void* arg, grpc_error* error) {
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)arg;
-  cancel_timer_if_needed(exec_ctx, deadline_state);
+  cancel_timer_if_needed(deadline_state);
   // Invoke the next callback.
-  GRPC_CLOSURE_RUN(exec_ctx, deadline_state->next_on_complete,
-                   GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(deadline_state->next_on_complete, GRPC_ERROR_REF(error));
 }
 
 // Inject our own on_complete callback into op.
@@ -156,8 +149,7 @@ struct start_timer_after_init_state {
   grpc_millis deadline;
   grpc_closure closure;
 };
-static void start_timer_after_init(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void start_timer_after_init(void* arg, grpc_error* error) {
   struct start_timer_after_init_state* state =
       (struct start_timer_after_init_state*)arg;
   grpc_deadline_state* deadline_state =
@@ -166,18 +158,18 @@ static void start_timer_after_init(grpc_exec_ctx* exec_ctx, void* arg,
     // We are initially called without holding the call combiner, so we
     // need to bounce ourselves into it.
     state->in_call_combiner = true;
-    GRPC_CALL_COMBINER_START(exec_ctx, deadline_state->call_combiner,
-                             &state->closure, GRPC_ERROR_REF(error),
+    GRPC_CALL_COMBINER_START(deadline_state->call_combiner, &state->closure,
+                             GRPC_ERROR_REF(error),
                              "scheduling deadline timer");
     return;
   }
-  start_timer_if_needed(exec_ctx, state->elem, state->deadline);
+  start_timer_if_needed(state->elem, state->deadline);
   gpr_free(state);
-  GRPC_CALL_COMBINER_STOP(exec_ctx, deadline_state->call_combiner,
+  GRPC_CALL_COMBINER_STOP(deadline_state->call_combiner,
                           "done scheduling deadline timer");
 }
 
-void grpc_deadline_state_init(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+void grpc_deadline_state_init(grpc_call_element* elem,
                               grpc_call_stack* call_stack,
                               grpc_call_combiner* call_combiner,
                               grpc_millis deadline) {
@@ -200,29 +192,27 @@ void grpc_deadline_state_init(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
     state->deadline = deadline;
     GRPC_CLOSURE_INIT(&state->closure, start_timer_after_init, state,
                       grpc_schedule_on_exec_ctx);
-    GRPC_CLOSURE_SCHED(exec_ctx, &state->closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&state->closure, GRPC_ERROR_NONE);
   }
 }
 
-void grpc_deadline_state_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_call_element* elem) {
+void grpc_deadline_state_destroy(grpc_call_element* elem) {
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
-  cancel_timer_if_needed(exec_ctx, deadline_state);
+  cancel_timer_if_needed(deadline_state);
 }
 
-void grpc_deadline_state_reset(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+void grpc_deadline_state_reset(grpc_call_element* elem,
                                grpc_millis new_deadline) {
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
-  cancel_timer_if_needed(exec_ctx, deadline_state);
-  start_timer_if_needed(exec_ctx, elem, new_deadline);
+  cancel_timer_if_needed(deadline_state);
+  start_timer_if_needed(elem, new_deadline);
 }
 
 void grpc_deadline_state_client_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
   if (op->cancel_stream) {
-    cancel_timer_if_needed(exec_ctx, deadline_state);
+    cancel_timer_if_needed(deadline_state);
   } else {
     // Make sure we know when the call is complete, so that we can cancel
     // the timer.
@@ -237,16 +227,14 @@ void grpc_deadline_state_client_start_transport_stream_op_batch(
 //
 
 // Constructor for channel_data.  Used for both client and server filters.
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
   return GRPC_ERROR_NONE;
 }
 
 // Destructor for channel_data.  Used for both client and server filters.
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 // Call data used for both client and server filter.
 typedef struct base_call_data {
@@ -266,50 +254,45 @@ typedef struct server_call_data {
 } server_call_data;
 
 // Constructor for call_data.  Used for both client and server filters.
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  grpc_deadline_state_init(exec_ctx, elem, args->call_stack,
-                           args->call_combiner, args->deadline);
+  grpc_deadline_state_init(elem, args->call_stack, args->call_combiner,
+                           args->deadline);
   return GRPC_ERROR_NONE;
 }
 
 // Destructor for call_data.  Used for both client and server filters.
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
-  grpc_deadline_state_destroy(exec_ctx, elem);
+  grpc_deadline_state_destroy(elem);
 }
 
 // Method for starting a call op for client filter.
 static void client_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
-  grpc_deadline_state_client_start_transport_stream_op_batch(exec_ctx, elem,
-                                                             op);
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
+  grpc_deadline_state_client_start_transport_stream_op_batch(elem, op);
   // Chain to next filter.
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 }
 
 // Callback for receiving initial metadata on the server.
-static void recv_initial_metadata_ready(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void recv_initial_metadata_ready(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   server_call_data* calld = (server_call_data*)elem->call_data;
   // Get deadline from metadata and start the timer if needed.
-  start_timer_if_needed(exec_ctx, elem, calld->recv_initial_metadata->deadline);
+  start_timer_if_needed(elem, calld->recv_initial_metadata->deadline);
   // Invoke the next callback.
   calld->next_recv_initial_metadata_ready->cb(
-      exec_ctx, calld->next_recv_initial_metadata_ready->cb_arg, error);
+      calld->next_recv_initial_metadata_ready->cb_arg, error);
 }
 
 // Method for starting a call op for server filter.
 static void server_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   server_call_data* calld = (server_call_data*)elem->call_data;
   if (op->cancel_stream) {
-    cancel_timer_if_needed(exec_ctx, &calld->base.deadline_state);
+    cancel_timer_if_needed(&calld->base.deadline_state);
   } else {
     // If we're receiving initial metadata, we need to get the deadline
     // from the recv_initial_metadata_ready callback.  So we inject our
@@ -335,7 +318,7 @@ static void server_start_transport_stream_op_batch(
     }
   }
   // Chain to next filter.
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 }
 
 const grpc_channel_filter grpc_client_deadline_filter = {
@@ -372,8 +355,7 @@ bool grpc_deadline_checking_enabled(const grpc_channel_args* channel_args) {
       !grpc_channel_args_want_minimal_stack(channel_args));
 }
 
-static bool maybe_add_deadline_filter(grpc_exec_ctx* exec_ctx,
-                                      grpc_channel_stack_builder* builder,
+static bool maybe_add_deadline_filter(grpc_channel_stack_builder* builder,
                                       void* arg) {
   return grpc_deadline_checking_enabled(
              grpc_channel_stack_builder_get_channel_arguments(builder))
diff --git a/src/core/ext/filters/deadline/deadline_filter.h b/src/core/ext/filters/deadline/deadline_filter.h
index 8d835d0382..4de817ef54 100644
--- a/src/core/ext/filters/deadline/deadline_filter.h
+++ b/src/core/ext/filters/deadline/deadline_filter.h
@@ -49,13 +49,12 @@ typedef struct grpc_deadline_state {
 //
 
 // assumes elem->call_data is zero'd
-void grpc_deadline_state_init(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+void grpc_deadline_state_init(grpc_call_element* elem,
                               grpc_call_stack* call_stack,
                               grpc_call_combiner* call_combiner,
                               grpc_millis deadline);
 
-void grpc_deadline_state_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_call_element* elem);
+void grpc_deadline_state_destroy(grpc_call_element* elem);
 
 // Cancels the existing timer and starts a new one with new_deadline.
 //
@@ -66,7 +65,7 @@ void grpc_deadline_state_destroy(grpc_exec_ctx* exec_ctx,
 // deadline may result in the timer being called twice.
 //
 // Note: Must be called while holding the call combiner.
-void grpc_deadline_state_reset(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+void grpc_deadline_state_reset(grpc_call_element* elem,
                                grpc_millis new_deadline);
 
 // To be called from the client-side filter's start_transport_stream_op_batch()
@@ -78,8 +77,7 @@ void grpc_deadline_state_reset(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
 //
 // Note: Must be called while holding the call combiner.
 void grpc_deadline_state_client_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op);
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op);
 
 // Should deadline checking be performed (according to channel args)
 bool grpc_deadline_checking_enabled(const grpc_channel_args* args);
diff --git a/src/core/ext/filters/http/client/http_client_filter.cc b/src/core/ext/filters/http/client/http_client_filter.cc
index a625369b02..a1fb10f5b8 100644
--- a/src/core/ext/filters/http/client/http_client_filter.cc
+++ b/src/core/ext/filters/http/client/http_client_filter.cc
@@ -68,12 +68,11 @@ typedef struct channel_data {
   size_t max_payload_size_for_get;
 } channel_data;
 
-static grpc_error* client_filter_incoming_metadata(grpc_exec_ctx* exec_ctx,
-                                                   grpc_call_element* elem,
+static grpc_error* client_filter_incoming_metadata(grpc_call_element* elem,
                                                    grpc_metadata_batch* b) {
   if (b->idx.named.status != nullptr) {
     if (grpc_mdelem_eq(b->idx.named.status->md, GRPC_MDELEM_STATUS_200)) {
-      grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.status);
+      grpc_metadata_batch_remove(b, b->idx.named.status);
     } else {
       char* val = grpc_dump_slice(GRPC_MDVALUE(b->idx.named.status->md),
                                   GPR_DUMP_ASCII);
@@ -98,10 +97,9 @@ static grpc_error* client_filter_incoming_metadata(grpc_exec_ctx* exec_ctx,
         GRPC_MDVALUE(b->idx.named.grpc_message->md));
     if (grpc_slice_is_equivalent(pct_decoded_msg,
                                  GRPC_MDVALUE(b->idx.named.grpc_message->md))) {
-      grpc_slice_unref_internal(exec_ctx, pct_decoded_msg);
+      grpc_slice_unref_internal(pct_decoded_msg);
     } else {
-      grpc_metadata_batch_set_value(exec_ctx, b->idx.named.grpc_message,
-                                    pct_decoded_msg);
+      grpc_metadata_batch_set_value(b->idx.named.grpc_message, pct_decoded_msg);
     }
   }
 
@@ -131,60 +129,53 @@ static grpc_error* client_filter_incoming_metadata(grpc_exec_ctx* exec_ctx,
         gpr_free(val);
       }
     }
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.content_type);
+    grpc_metadata_batch_remove(b, b->idx.named.content_type);
   }
 
   return GRPC_ERROR_NONE;
 }
 
-static void recv_initial_metadata_ready(grpc_exec_ctx* exec_ctx,
-                                        void* user_data, grpc_error* error) {
+static void recv_initial_metadata_ready(void* user_data, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
   if (error == GRPC_ERROR_NONE) {
-    error = client_filter_incoming_metadata(exec_ctx, elem,
-                                            calld->recv_initial_metadata);
+    error = client_filter_incoming_metadata(elem, calld->recv_initial_metadata);
   } else {
     GRPC_ERROR_REF(error);
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_recv_initial_metadata_ready,
-                   error);
+  GRPC_CLOSURE_RUN(calld->original_recv_initial_metadata_ready, error);
 }
 
-static void recv_trailing_metadata_on_complete(grpc_exec_ctx* exec_ctx,
-                                               void* user_data,
+static void recv_trailing_metadata_on_complete(void* user_data,
                                                grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
   if (error == GRPC_ERROR_NONE) {
-    error = client_filter_incoming_metadata(exec_ctx, elem,
-                                            calld->recv_trailing_metadata);
+    error =
+        client_filter_incoming_metadata(elem, calld->recv_trailing_metadata);
   } else {
     GRPC_ERROR_REF(error);
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_recv_trailing_metadata_on_complete,
-                   error);
+  GRPC_CLOSURE_RUN(calld->original_recv_trailing_metadata_on_complete, error);
 }
 
-static void send_message_on_complete(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* error) {
+static void send_message_on_complete(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
-  grpc_byte_stream_cache_destroy(exec_ctx, &calld->send_message_cache);
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_send_message_on_complete,
+  grpc_byte_stream_cache_destroy(&calld->send_message_cache);
+  GRPC_CLOSURE_RUN(calld->original_send_message_on_complete,
                    GRPC_ERROR_REF(error));
 }
 
 // Pulls a slice from the send_message byte stream, updating
 // calld->send_message_bytes_read.
-static grpc_error* pull_slice_from_send_message(grpc_exec_ctx* exec_ctx,
-                                                call_data* calld) {
+static grpc_error* pull_slice_from_send_message(call_data* calld) {
   grpc_slice incoming_slice;
   grpc_error* error = grpc_byte_stream_pull(
-      exec_ctx, &calld->send_message_caching_stream.base, &incoming_slice);
+      &calld->send_message_caching_stream.base, &incoming_slice);
   if (error == GRPC_ERROR_NONE) {
     calld->send_message_bytes_read += GRPC_SLICE_LENGTH(incoming_slice);
-    grpc_slice_unref_internal(exec_ctx, incoming_slice);
+    grpc_slice_unref_internal(incoming_slice);
   }
   return error;
 }
@@ -194,12 +185,10 @@ static grpc_error* pull_slice_from_send_message(grpc_exec_ctx* exec_ctx,
 // calld->send_message_caching_stream.base.length, then we have completed
 // reading from the byte stream; otherwise, an async read has been dispatched
 // and on_send_message_next_done() will be invoked when it is complete.
-static grpc_error* read_all_available_send_message_data(grpc_exec_ctx* exec_ctx,
-                                                        call_data* calld) {
-  while (grpc_byte_stream_next(exec_ctx,
-                               &calld->send_message_caching_stream.base,
+static grpc_error* read_all_available_send_message_data(call_data* calld) {
+  while (grpc_byte_stream_next(&calld->send_message_caching_stream.base,
                                ~(size_t)0, &calld->on_send_message_next_done)) {
-    grpc_error* error = pull_slice_from_send_message(exec_ctx, calld);
+    grpc_error* error = pull_slice_from_send_message(calld);
     if (error != GRPC_ERROR_NONE) return error;
     if (calld->send_message_bytes_read ==
         calld->send_message_caching_stream.base.length) {
@@ -210,19 +199,18 @@ static grpc_error* read_all_available_send_message_data(grpc_exec_ctx* exec_ctx,
 }
 
 // Async callback for grpc_byte_stream_next().
-static void on_send_message_next_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_error* error) {
+static void on_send_message_next_done(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   if (error != GRPC_ERROR_NONE) {
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, calld->send_message_batch, error, calld->call_combiner);
+        calld->send_message_batch, error, calld->call_combiner);
     return;
   }
-  error = pull_slice_from_send_message(exec_ctx, calld);
+  error = pull_slice_from_send_message(calld);
   if (error != GRPC_ERROR_NONE) {
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, calld->send_message_batch, error, calld->call_combiner);
+        calld->send_message_batch, error, calld->call_combiner);
     return;
   }
   // There may or may not be more to read, but we don't care.  If we got
@@ -230,7 +218,7 @@ static void on_send_message_next_done(grpc_exec_ctx* exec_ctx, void* arg,
   // synchronously, so we were not able to do a cached call.  Instead,
   // we just reset the byte stream and then send down the batch as-is.
   grpc_caching_byte_stream_reset(&calld->send_message_caching_stream);
-  grpc_call_next_op(exec_ctx, elem, calld->send_message_batch);
+  grpc_call_next_op(elem, calld->send_message_batch);
 }
 
 static char* slice_buffer_to_string(grpc_slice_buffer* slice_buffer) {
@@ -248,8 +236,7 @@ static char* slice_buffer_to_string(grpc_slice_buffer* slice_buffer) {
 
 // Modifies the path entry in the batch's send_initial_metadata to
 // append the base64-encoded query for a GET request.
-static grpc_error* update_path_for_get(grpc_exec_ctx* exec_ctx,
-                                       grpc_call_element* elem,
+static grpc_error* update_path_for_get(grpc_call_element* elem,
                                        grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   grpc_slice path_slice =
@@ -282,24 +269,22 @@ static grpc_error* update_path_for_get(grpc_exec_ctx* exec_ctx,
       grpc_slice_sub_no_ref(path_with_query_slice, 0, strlen(t));
   /* substitute previous path with the new path+query */
   grpc_mdelem mdelem_path_and_query =
-      grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_PATH, path_with_query_slice);
+      grpc_mdelem_from_slices(GRPC_MDSTR_PATH, path_with_query_slice);
   grpc_metadata_batch* b =
       batch->payload->send_initial_metadata.send_initial_metadata;
-  return grpc_metadata_batch_substitute(exec_ctx, b, b->idx.named.path,
+  return grpc_metadata_batch_substitute(b, b->idx.named.path,
                                         mdelem_path_and_query);
 }
 
-static void remove_if_present(grpc_exec_ctx* exec_ctx,
-                              grpc_metadata_batch* batch,
+static void remove_if_present(grpc_metadata_batch* batch,
                               grpc_metadata_batch_callouts_index idx) {
   if (batch->idx.array[idx] != nullptr) {
-    grpc_metadata_batch_remove(exec_ctx, batch, batch->idx.array[idx]);
+    grpc_metadata_batch_remove(batch, batch->idx.array[idx]);
   }
 }
 
 static void hc_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* channeld = (channel_data*)elem->channel_data;
   GPR_TIMER_BEGIN("hc_start_transport_stream_op_batch", 0);
@@ -345,17 +330,16 @@ static void hc_start_transport_stream_op_batch(
       calld->original_send_message_on_complete = batch->on_complete;
       batch->on_complete = &calld->send_message_on_complete;
       calld->send_message_batch = batch;
-      error = read_all_available_send_message_data(exec_ctx, calld);
+      error = read_all_available_send_message_data(calld);
       if (error != GRPC_ERROR_NONE) goto done;
       // If all the data has been read, then we can use GET.
       if (calld->send_message_bytes_read ==
           calld->send_message_caching_stream.base.length) {
         method = GRPC_MDELEM_METHOD_GET;
-        error = update_path_for_get(exec_ctx, elem, batch);
+        error = update_path_for_get(elem, batch);
         if (error != GRPC_ERROR_NONE) goto done;
         batch->send_message = false;
-        grpc_byte_stream_destroy(exec_ctx,
-                                 &calld->send_message_caching_stream.base);
+        grpc_byte_stream_destroy(&calld->send_message_caching_stream.base);
       } else {
         // Not all data is available.  The batch will be sent down
         // asynchronously in on_send_message_next_done().
@@ -372,41 +356,41 @@ static void hc_start_transport_stream_op_batch(
     }
 
     remove_if_present(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         GRPC_BATCH_METHOD);
     remove_if_present(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         GRPC_BATCH_SCHEME);
     remove_if_present(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         GRPC_BATCH_TE);
     remove_if_present(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         GRPC_BATCH_CONTENT_TYPE);
     remove_if_present(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         GRPC_BATCH_USER_AGENT);
 
     /* Send : prefixed headers, which have to be before any application
        layer headers. */
     error = grpc_metadata_batch_add_head(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         &calld->method, method);
     if (error != GRPC_ERROR_NONE) goto done;
     error = grpc_metadata_batch_add_head(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         &calld->scheme, channeld->static_scheme);
     if (error != GRPC_ERROR_NONE) goto done;
     error = grpc_metadata_batch_add_tail(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         &calld->te_trailers, GRPC_MDELEM_TE_TRAILERS);
     if (error != GRPC_ERROR_NONE) goto done;
     error = grpc_metadata_batch_add_tail(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         &calld->content_type, GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC);
     if (error != GRPC_ERROR_NONE) goto done;
     error = grpc_metadata_batch_add_tail(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         &calld->user_agent, GRPC_MDELEM_REF(channeld->user_agent));
     if (error != GRPC_ERROR_NONE) goto done;
   }
@@ -414,16 +398,15 @@ static void hc_start_transport_stream_op_batch(
 done:
   if (error != GRPC_ERROR_NONE) {
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, calld->send_message_batch, error, calld->call_combiner);
+        calld->send_message_batch, error, calld->call_combiner);
   } else if (!batch_will_be_handled_asynchronously) {
-    grpc_call_next_op(exec_ctx, elem, batch);
+    grpc_call_next_op(elem, batch);
   }
   GPR_TIMER_END("hc_start_transport_stream_op_batch", 0);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   calld->call_combiner = args->call_combiner;
@@ -441,7 +424,7 @@ static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
@@ -533,8 +516,7 @@ static grpc_slice user_agent_from_args(const grpc_channel_args* args,
 }
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   channel_data* chand = (channel_data*)elem->channel_data;
   GPR_ASSERT(!args->is_last);
@@ -543,17 +525,16 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
   chand->max_payload_size_for_get =
       max_payload_size_from_args(args->channel_args);
   chand->user_agent = grpc_mdelem_from_slices(
-      exec_ctx, GRPC_MDSTR_USER_AGENT,
+      GRPC_MDSTR_USER_AGENT,
       user_agent_from_args(args->channel_args,
                            args->optional_transport->vtable->name));
   return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
-  GRPC_MDELEM_UNREF(exec_ctx, chand->user_agent);
+  GRPC_MDELEM_UNREF(chand->user_agent);
 }
 
 const grpc_channel_filter grpc_http_client_filter = {
diff --git a/src/core/ext/filters/http/http_filters_plugin.cc b/src/core/ext/filters/http/http_filters_plugin.cc
index 483eb021e8..deec77c96f 100644
--- a/src/core/ext/filters/http/http_filters_plugin.cc
+++ b/src/core/ext/filters/http/http_filters_plugin.cc
@@ -40,8 +40,7 @@ static bool is_building_http_like_transport(
   return t != nullptr && strstr(t->vtable->name, "http");
 }
 
-static bool maybe_add_optional_filter(grpc_exec_ctx* exec_ctx,
-                                      grpc_channel_stack_builder* builder,
+static bool maybe_add_optional_filter(grpc_channel_stack_builder* builder,
                                       void* arg) {
   if (!is_building_http_like_transport(builder)) return true;
   optional_filter* filtarg = (optional_filter*)arg;
@@ -55,8 +54,7 @@ static bool maybe_add_optional_filter(grpc_exec_ctx* exec_ctx,
                 : true;
 }
 
-static bool maybe_add_required_filter(grpc_exec_ctx* exec_ctx,
-                                      grpc_channel_stack_builder* builder,
+static bool maybe_add_required_filter(grpc_channel_stack_builder* builder,
                                       void* arg) {
   return is_building_http_like_transport(builder)
              ? grpc_channel_stack_builder_prepend_filter(
diff --git a/src/core/ext/filters/http/message_compress/message_compress_filter.cc b/src/core/ext/filters/http/message_compress/message_compress_filter.cc
index d070b56b6a..9ae13d2ed2 100644
--- a/src/core/ext/filters/http/message_compress/message_compress_filter.cc
+++ b/src/core/ext/filters/http/message_compress/message_compress_filter.cc
@@ -100,12 +100,11 @@ static bool skip_compression(grpc_call_element* elem, uint32_t flags,
 
 /** Filter initial metadata */
 static grpc_error* process_send_initial_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_metadata_batch* initial_metadata,
+    grpc_call_element* elem, grpc_metadata_batch* initial_metadata,
     bool* has_compression_algorithm) GRPC_MUST_USE_RESULT;
 static grpc_error* process_send_initial_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_metadata_batch* initial_metadata, bool* has_compression_algorithm) {
+    grpc_call_element* elem, grpc_metadata_batch* initial_metadata,
+    bool* has_compression_algorithm) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* channeld = (channel_data*)elem->channel_data;
   *has_compression_algorithm = false;
@@ -137,13 +136,13 @@ static grpc_error* process_send_initial_metadata(
     }
     *has_compression_algorithm = true;
     grpc_metadata_batch_remove(
-        exec_ctx, initial_metadata,
+        initial_metadata,
         initial_metadata->idx.named.grpc_internal_stream_encoding_request);
     /* Disable message-wise compression */
     calld->compression_algorithm = GRPC_COMPRESS_NONE;
     if (initial_metadata->idx.named.grpc_internal_encoding_request != nullptr) {
       grpc_metadata_batch_remove(
-          exec_ctx, initial_metadata,
+          initial_metadata,
           initial_metadata->idx.named.grpc_internal_encoding_request);
     }
   } else if (initial_metadata->idx.named.grpc_internal_encoding_request !=
@@ -160,7 +159,7 @@ static grpc_error* process_send_initial_metadata(
     }
     *has_compression_algorithm = true;
     grpc_metadata_batch_remove(
-        exec_ctx, initial_metadata,
+        initial_metadata,
         initial_metadata->idx.named.grpc_internal_encoding_request);
   } else {
     /* If no algorithm was found in the metadata and we aren't
@@ -181,12 +180,11 @@ static grpc_error* process_send_initial_metadata(
   /* hint compression algorithm */
   if (stream_compression_algorithm != GRPC_STREAM_COMPRESS_NONE) {
     error = grpc_metadata_batch_add_tail(
-        exec_ctx, initial_metadata,
-        &calld->stream_compression_algorithm_storage,
+        initial_metadata, &calld->stream_compression_algorithm_storage,
         grpc_stream_compression_encoding_mdelem(stream_compression_algorithm));
   } else if (calld->compression_algorithm != GRPC_COMPRESS_NONE) {
     error = grpc_metadata_batch_add_tail(
-        exec_ctx, initial_metadata, &calld->compression_algorithm_storage,
+        initial_metadata, &calld->compression_algorithm_storage,
         grpc_compression_encoding_mdelem(calld->compression_algorithm));
   }
 
@@ -194,7 +192,7 @@ static grpc_error* process_send_initial_metadata(
 
   /* convey supported compression algorithms */
   error = grpc_metadata_batch_add_tail(
-      exec_ctx, initial_metadata, &calld->accept_encoding_storage,
+      initial_metadata, &calld->accept_encoding_storage,
       GRPC_MDELEM_ACCEPT_ENCODING_FOR_ALGORITHMS(
           channeld->supported_compression_algorithms));
 
@@ -203,7 +201,7 @@ static grpc_error* process_send_initial_metadata(
   /* Do not overwrite accept-encoding header if it already presents. */
   if (!initial_metadata->idx.named.accept_encoding) {
     error = grpc_metadata_batch_add_tail(
-        exec_ctx, initial_metadata, &calld->accept_stream_encoding_storage,
+        initial_metadata, &calld->accept_stream_encoding_storage,
         GRPC_MDELEM_ACCEPT_STREAM_ENCODING_FOR_ALGORITHMS(
             channeld->supported_stream_compression_algorithms));
   }
@@ -211,17 +209,15 @@ static grpc_error* process_send_initial_metadata(
   return error;
 }
 
-static void send_message_on_complete(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* error) {
+static void send_message_on_complete(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &calld->slices);
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_send_message_on_complete,
+  grpc_slice_buffer_reset_and_unref_internal(&calld->slices);
+  GRPC_CLOSURE_RUN(calld->original_send_message_on_complete,
                    GRPC_ERROR_REF(error));
 }
 
-static void send_message_batch_continue(grpc_exec_ctx* exec_ctx,
-                                        grpc_call_element* elem) {
+static void send_message_batch_continue(grpc_call_element* elem) {
   call_data* calld = (call_data*)elem->call_data;
   // Note: The call to grpc_call_next_op() results in yielding the
   // call combiner, so we need to clear calld->send_message_batch
@@ -229,19 +225,18 @@ static void send_message_batch_continue(grpc_exec_ctx* exec_ctx,
   grpc_transport_stream_op_batch* send_message_batch =
       calld->send_message_batch;
   calld->send_message_batch = nullptr;
-  grpc_call_next_op(exec_ctx, elem, send_message_batch);
+  grpc_call_next_op(elem, send_message_batch);
 }
 
-static void finish_send_message(grpc_exec_ctx* exec_ctx,
-                                grpc_call_element* elem) {
+static void finish_send_message(grpc_call_element* elem) {
   call_data* calld = (call_data*)elem->call_data;
   // Compress the data if appropriate.
   grpc_slice_buffer tmp;
   grpc_slice_buffer_init(&tmp);
   uint32_t send_flags =
       calld->send_message_batch->payload->send_message.send_message->flags;
-  bool did_compress = grpc_msg_compress(exec_ctx, calld->compression_algorithm,
-                                        &calld->slices, &tmp);
+  bool did_compress =
+      grpc_msg_compress(calld->compression_algorithm, &calld->slices, &tmp);
   if (did_compress) {
     if (grpc_compression_trace.enabled()) {
       const char* algo_name;
@@ -268,11 +263,11 @@ static void finish_send_message(grpc_exec_ctx* exec_ctx,
               algo_name, calld->slices.length);
     }
   }
-  grpc_slice_buffer_destroy_internal(exec_ctx, &tmp);
+  grpc_slice_buffer_destroy_internal(&tmp);
   // Swap out the original byte stream with our new one and send the
   // batch down.
   grpc_byte_stream_destroy(
-      exec_ctx, calld->send_message_batch->payload->send_message.send_message);
+      calld->send_message_batch->payload->send_message.send_message);
   grpc_slice_buffer_stream_init(&calld->replacement_stream, &calld->slices,
                                 send_flags);
   calld->send_message_batch->payload->send_message.send_message =
@@ -280,27 +275,24 @@ static void finish_send_message(grpc_exec_ctx* exec_ctx,
   calld->original_send_message_on_complete =
       calld->send_message_batch->on_complete;
   calld->send_message_batch->on_complete = &calld->send_message_on_complete;
-  send_message_batch_continue(exec_ctx, elem);
+  send_message_batch_continue(elem);
 }
 
-static void fail_send_message_batch_in_call_combiner(grpc_exec_ctx* exec_ctx,
-                                                     void* arg,
+static void fail_send_message_batch_in_call_combiner(void* arg,
                                                      grpc_error* error) {
   call_data* calld = (call_data*)arg;
   if (calld->send_message_batch != nullptr) {
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, calld->send_message_batch, GRPC_ERROR_REF(error),
-        calld->call_combiner);
+        calld->send_message_batch, GRPC_ERROR_REF(error), calld->call_combiner);
     calld->send_message_batch = nullptr;
   }
 }
 
 // Pulls a slice from the send_message byte stream and adds it to calld->slices.
-static grpc_error* pull_slice_from_send_message(grpc_exec_ctx* exec_ctx,
-                                                call_data* calld) {
+static grpc_error* pull_slice_from_send_message(call_data* calld) {
   grpc_slice incoming_slice;
   grpc_error* error = grpc_byte_stream_pull(
-      exec_ctx, calld->send_message_batch->payload->send_message.send_message,
+      calld->send_message_batch->payload->send_message.send_message,
       &incoming_slice);
   if (error == GRPC_ERROR_NONE) {
     grpc_slice_buffer_add(&calld->slices, incoming_slice);
@@ -312,69 +304,65 @@ static grpc_error* pull_slice_from_send_message(grpc_exec_ctx* exec_ctx,
 // If all data has been read, invokes finish_send_message().  Otherwise,
 // an async call to grpc_byte_stream_next() has been started, which will
 // eventually result in calling on_send_message_next_done().
-static void continue_reading_send_message(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_element* elem) {
+static void continue_reading_send_message(grpc_call_element* elem) {
   call_data* calld = (call_data*)elem->call_data;
   while (grpc_byte_stream_next(
-      exec_ctx, calld->send_message_batch->payload->send_message.send_message,
-      ~(size_t)0, &calld->on_send_message_next_done)) {
-    grpc_error* error = pull_slice_from_send_message(exec_ctx, calld);
+      calld->send_message_batch->payload->send_message.send_message, ~(size_t)0,
+      &calld->on_send_message_next_done)) {
+    grpc_error* error = pull_slice_from_send_message(calld);
     if (error != GRPC_ERROR_NONE) {
       // Closure callback; does not take ownership of error.
-      fail_send_message_batch_in_call_combiner(exec_ctx, calld, error);
+      fail_send_message_batch_in_call_combiner(calld, error);
       GRPC_ERROR_UNREF(error);
       return;
     }
     if (calld->slices.length ==
         calld->send_message_batch->payload->send_message.send_message->length) {
-      finish_send_message(exec_ctx, elem);
+      finish_send_message(elem);
       break;
     }
   }
 }
 
 // Async callback for grpc_byte_stream_next().
-static void on_send_message_next_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_error* error) {
+static void on_send_message_next_done(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   if (error != GRPC_ERROR_NONE) {
     // Closure callback; does not take ownership of error.
-    fail_send_message_batch_in_call_combiner(exec_ctx, calld, error);
+    fail_send_message_batch_in_call_combiner(calld, error);
     return;
   }
-  error = pull_slice_from_send_message(exec_ctx, calld);
+  error = pull_slice_from_send_message(calld);
   if (error != GRPC_ERROR_NONE) {
     // Closure callback; does not take ownership of error.
-    fail_send_message_batch_in_call_combiner(exec_ctx, calld, error);
+    fail_send_message_batch_in_call_combiner(calld, error);
     GRPC_ERROR_UNREF(error);
     return;
   }
   if (calld->slices.length ==
       calld->send_message_batch->payload->send_message.send_message->length) {
-    finish_send_message(exec_ctx, elem);
+    finish_send_message(elem);
   } else {
-    continue_reading_send_message(exec_ctx, elem);
+    continue_reading_send_message(elem);
   }
 }
 
-static void start_send_message_batch(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* unused) {
+static void start_send_message_batch(void* arg, grpc_error* unused) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   if (skip_compression(
           elem,
           calld->send_message_batch->payload->send_message.send_message->flags,
           calld->send_initial_metadata_state == HAS_COMPRESSION_ALGORITHM)) {
-    send_message_batch_continue(exec_ctx, elem);
+    send_message_batch_continue(elem);
   } else {
-    continue_reading_send_message(exec_ctx, elem);
+    continue_reading_send_message(elem);
   }
 }
 
 static void compress_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   GPR_TIMER_BEGIN("compress_start_transport_stream_op_batch", 0);
   // Handle cancel_stream.
@@ -385,21 +373,19 @@ static void compress_start_transport_stream_op_batch(
     if (calld->send_message_batch != nullptr) {
       if (calld->send_initial_metadata_state == INITIAL_METADATA_UNSEEN) {
         GRPC_CALL_COMBINER_START(
-            exec_ctx, calld->call_combiner,
+            calld->call_combiner,
             GRPC_CLOSURE_CREATE(fail_send_message_batch_in_call_combiner, calld,
                                 grpc_schedule_on_exec_ctx),
             GRPC_ERROR_REF(calld->cancel_error), "failing send_message op");
       } else {
         grpc_byte_stream_shutdown(
-            exec_ctx,
             calld->send_message_batch->payload->send_message.send_message,
             GRPC_ERROR_REF(calld->cancel_error));
       }
     }
   } else if (calld->cancel_error != GRPC_ERROR_NONE) {
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, batch, GRPC_ERROR_REF(calld->cancel_error),
-        calld->call_combiner);
+        batch, GRPC_ERROR_REF(calld->cancel_error), calld->call_combiner);
     goto done;
   }
   // Handle send_initial_metadata.
@@ -407,11 +393,10 @@ static void compress_start_transport_stream_op_batch(
     GPR_ASSERT(calld->send_initial_metadata_state == INITIAL_METADATA_UNSEEN);
     bool has_compression_algorithm;
     grpc_error* error = process_send_initial_metadata(
-        exec_ctx, elem,
-        batch->payload->send_initial_metadata.send_initial_metadata,
+        elem, batch->payload->send_initial_metadata.send_initial_metadata,
         &has_compression_algorithm);
     if (error != GRPC_ERROR_NONE) {
-      grpc_transport_stream_op_batch_finish_with_failure(exec_ctx, batch, error,
+      grpc_transport_stream_op_batch_finish_with_failure(batch, error,
                                                          calld->call_combiner);
       goto done;
     }
@@ -425,7 +410,7 @@ static void compress_start_transport_stream_op_batch(
     // the call stack) will release the call combiner for each batch it sees.
     if (calld->send_message_batch != nullptr) {
       GRPC_CALL_COMBINER_START(
-          exec_ctx, calld->call_combiner,
+          calld->call_combiner,
           &calld->start_send_message_batch_in_call_combiner, GRPC_ERROR_NONE,
           "starting send_message after send_initial_metadata");
     }
@@ -440,22 +425,21 @@ static void compress_start_transport_stream_op_batch(
     // send_initial_metadata.
     if (calld->send_initial_metadata_state == INITIAL_METADATA_UNSEEN) {
       GRPC_CALL_COMBINER_STOP(
-          exec_ctx, calld->call_combiner,
+          calld->call_combiner,
           "send_message batch pending send_initial_metadata");
       goto done;
     }
-    start_send_message_batch(exec_ctx, elem, GRPC_ERROR_NONE);
+    start_send_message_batch(elem, GRPC_ERROR_NONE);
   } else {
     // Pass control down the stack.
-    grpc_call_next_op(exec_ctx, elem, batch);
+    grpc_call_next_op(elem, batch);
   }
 done:
   GPR_TIMER_END("compress_start_transport_stream_op_batch", 0);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   calld->call_combiner = args->call_combiner;
@@ -471,17 +455,16 @@ static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   call_data* calld = (call_data*)elem->call_data;
-  grpc_slice_buffer_destroy_internal(exec_ctx, &calld->slices);
+  grpc_slice_buffer_destroy_internal(&calld->slices);
   GRPC_ERROR_UNREF(calld->cancel_error);
 }
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   channel_data* channeld = (channel_data*)elem->channel_data;
 
@@ -531,8 +514,7 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
 }
 
 /* Destructor for channel data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 const grpc_channel_filter grpc_message_compress_filter = {
     compress_start_transport_stream_op_batch,
diff --git a/src/core/ext/filters/http/server/http_server_filter.cc b/src/core/ext/filters/http/server/http_server_filter.cc
index 4f3897915c..b872dc98f5 100644
--- a/src/core/ext/filters/http/server/http_server_filter.cc
+++ b/src/core/ext/filters/http/server/http_server_filter.cc
@@ -66,8 +66,7 @@ typedef struct channel_data {
   uint8_t unused;
 } channel_data;
 
-static grpc_error* server_filter_outgoing_metadata(grpc_exec_ctx* exec_ctx,
-                                                   grpc_call_element* elem,
+static grpc_error* server_filter_outgoing_metadata(grpc_call_element* elem,
                                                    grpc_metadata_batch* b) {
   if (b->idx.named.grpc_message != nullptr) {
     grpc_slice pct_encoded_msg = grpc_percent_encode_slice(
@@ -75,10 +74,9 @@ static grpc_error* server_filter_outgoing_metadata(grpc_exec_ctx* exec_ctx,
         grpc_compatible_percent_encoding_unreserved_bytes);
     if (grpc_slice_is_equivalent(pct_encoded_msg,
                                  GRPC_MDVALUE(b->idx.named.grpc_message->md))) {
-      grpc_slice_unref_internal(exec_ctx, pct_encoded_msg);
+      grpc_slice_unref_internal(pct_encoded_msg);
     } else {
-      grpc_metadata_batch_set_value(exec_ctx, b->idx.named.grpc_message,
-                                    pct_encoded_msg);
+      grpc_metadata_batch_set_value(b->idx.named.grpc_message, pct_encoded_msg);
     }
   }
   return GRPC_ERROR_NONE;
@@ -93,8 +91,7 @@ static void add_error(const char* error_name, grpc_error** cumulative,
   *cumulative = grpc_error_add_child(*cumulative, new_err);
 }
 
-static grpc_error* server_filter_incoming_metadata(grpc_exec_ctx* exec_ctx,
-                                                   grpc_call_element* elem,
+static grpc_error* server_filter_incoming_metadata(grpc_call_element* elem,
                                                    grpc_metadata_batch* b) {
   call_data* calld = (call_data*)elem->call_data;
   grpc_error* error = GRPC_ERROR_NONE;
@@ -123,7 +120,7 @@ static grpc_error* server_filter_incoming_metadata(grpc_exec_ctx* exec_ctx,
                     GRPC_ERROR_CREATE_FROM_STATIC_STRING("Bad header"),
                     b->idx.named.method->md));
     }
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.method);
+    grpc_metadata_batch_remove(b, b->idx.named.method);
   } else {
     add_error(
         error_name, &error,
@@ -139,7 +136,7 @@ static grpc_error* server_filter_incoming_metadata(grpc_exec_ctx* exec_ctx,
                     GRPC_ERROR_CREATE_FROM_STATIC_STRING("Bad header"),
                     b->idx.named.te->md));
     }
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.te);
+    grpc_metadata_batch_remove(b, b->idx.named.te);
   } else {
     add_error(error_name, &error,
               grpc_error_set_str(
@@ -156,7 +153,7 @@ static grpc_error* server_filter_incoming_metadata(grpc_exec_ctx* exec_ctx,
                     GRPC_ERROR_CREATE_FROM_STATIC_STRING("Bad header"),
                     b->idx.named.scheme->md));
     }
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.scheme);
+    grpc_metadata_batch_remove(b, b->idx.named.scheme);
   } else {
     add_error(
         error_name, &error,
@@ -191,7 +188,7 @@ static grpc_error* server_filter_incoming_metadata(grpc_exec_ctx* exec_ctx,
         gpr_free(val);
       }
     }
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.content_type);
+    grpc_metadata_batch_remove(b, b->idx.named.content_type);
   }
 
   if (b->idx.named.path == nullptr) {
@@ -218,22 +215,21 @@ static grpc_error* server_filter_incoming_metadata(grpc_exec_ctx* exec_ctx,
 
       /* substitute path metadata with just the path (not query) */
       grpc_mdelem mdelem_path_without_query = grpc_mdelem_from_slices(
-          exec_ctx, GRPC_MDSTR_PATH, grpc_slice_sub(path_slice, 0, offset));
+          GRPC_MDSTR_PATH, grpc_slice_sub(path_slice, 0, offset));
 
-      grpc_metadata_batch_substitute(exec_ctx, b, b->idx.named.path,
+      grpc_metadata_batch_substitute(b, b->idx.named.path,
                                      mdelem_path_without_query);
 
       /* decode payload from query and add to the slice buffer to be returned */
       const int k_url_safe = 1;
-      grpc_slice_buffer_add(
-          &calld->read_slice_buffer,
-          grpc_base64_decode_with_len(
-              exec_ctx, (const char*)GRPC_SLICE_START_PTR(query_slice),
-              GRPC_SLICE_LENGTH(query_slice), k_url_safe));
+      grpc_slice_buffer_add(&calld->read_slice_buffer,
+                            grpc_base64_decode_with_len(
+                                (const char*)GRPC_SLICE_START_PTR(query_slice),
+                                GRPC_SLICE_LENGTH(query_slice), k_url_safe));
       grpc_slice_buffer_stream_init(&calld->read_stream,
                                     &calld->read_slice_buffer, 0);
       calld->seen_path_with_query = true;
-      grpc_slice_unref_internal(exec_ctx, query_slice);
+      grpc_slice_unref_internal(query_slice);
     } else {
       gpr_log(GPR_ERROR, "GET request without QUERY");
     }
@@ -242,14 +238,14 @@ static grpc_error* server_filter_incoming_metadata(grpc_exec_ctx* exec_ctx,
   if (b->idx.named.host != nullptr && b->idx.named.authority == nullptr) {
     grpc_linked_mdelem* el = b->idx.named.host;
     grpc_mdelem md = GRPC_MDELEM_REF(el->md);
-    grpc_metadata_batch_remove(exec_ctx, b, el);
+    grpc_metadata_batch_remove(b, el);
     add_error(error_name, &error,
               grpc_metadata_batch_add_head(
-                  exec_ctx, b, el,
+                  b, el,
                   grpc_mdelem_from_slices(
-                      exec_ctx, GRPC_MDSTR_AUTHORITY,
+                      GRPC_MDSTR_AUTHORITY,
                       grpc_slice_ref_internal(GRPC_MDVALUE(md)))));
-    GRPC_MDELEM_UNREF(exec_ctx, md);
+    GRPC_MDELEM_UNREF(md);
   }
 
   if (b->idx.named.authority == nullptr) {
@@ -263,21 +259,18 @@ static grpc_error* server_filter_incoming_metadata(grpc_exec_ctx* exec_ctx,
   return error;
 }
 
-static void hs_on_recv(grpc_exec_ctx* exec_ctx, void* user_data,
-                       grpc_error* err) {
+static void hs_on_recv(void* user_data, grpc_error* err) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
   if (err == GRPC_ERROR_NONE) {
-    err = server_filter_incoming_metadata(exec_ctx, elem,
-                                          calld->recv_initial_metadata);
+    err = server_filter_incoming_metadata(elem, calld->recv_initial_metadata);
   } else {
     GRPC_ERROR_REF(err);
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->on_done_recv, err);
+  GRPC_CLOSURE_RUN(calld->on_done_recv, err);
 }
 
-static void hs_on_complete(grpc_exec_ctx* exec_ctx, void* user_data,
-                           grpc_error* err) {
+static void hs_on_complete(void* user_data, grpc_error* err) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
   /* Call recv_message_ready if we got the payload via the path field */
@@ -287,17 +280,16 @@ static void hs_on_complete(grpc_exec_ctx* exec_ctx, void* user_data,
                                   : (grpc_byte_stream*)&calld->read_stream;
     // Re-enter call combiner for recv_message_ready, since the surface
     // code will release the call combiner for each callback it receives.
-    GRPC_CALL_COMBINER_START(exec_ctx, calld->call_combiner,
-                             calld->recv_message_ready, GRPC_ERROR_REF(err),
+    GRPC_CALL_COMBINER_START(calld->call_combiner, calld->recv_message_ready,
+                             GRPC_ERROR_REF(err),
                              "resuming recv_message_ready from on_complete");
     calld->recv_message_ready = nullptr;
     calld->payload_bin_delivered = true;
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->on_complete, GRPC_ERROR_REF(err));
+  GRPC_CLOSURE_RUN(calld->on_complete, GRPC_ERROR_REF(err));
 }
 
-static void hs_recv_message_ready(grpc_exec_ctx* exec_ctx, void* user_data,
-                                  grpc_error* err) {
+static void hs_recv_message_ready(void* user_data, grpc_error* err) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
   if (calld->seen_path_with_query) {
@@ -305,15 +297,14 @@ static void hs_recv_message_ready(grpc_exec_ctx* exec_ctx, void* user_data,
     // returned in hs_on_complete callback.
     // Note that we release the call combiner here, so that other
     // callbacks can run.
-    GRPC_CALL_COMBINER_STOP(exec_ctx, calld->call_combiner,
+    GRPC_CALL_COMBINER_STOP(calld->call_combiner,
                             "pausing recv_message_ready until on_complete");
   } else {
-    GRPC_CLOSURE_RUN(exec_ctx, calld->recv_message_ready, GRPC_ERROR_REF(err));
+    GRPC_CLOSURE_RUN(calld->recv_message_ready, GRPC_ERROR_REF(err));
   }
 }
 
-static grpc_error* hs_mutate_op(grpc_exec_ctx* exec_ctx,
-                                grpc_call_element* elem,
+static grpc_error* hs_mutate_op(grpc_call_element* elem,
                                 grpc_transport_stream_op_batch* op) {
   /* grab pointers to our data from the call element */
   call_data* calld = (call_data*)elem->call_data;
@@ -321,21 +312,19 @@ static grpc_error* hs_mutate_op(grpc_exec_ctx* exec_ctx,
   if (op->send_initial_metadata) {
     grpc_error* error = GRPC_ERROR_NONE;
     static const char* error_name = "Failed sending initial metadata";
+    add_error(error_name, &error,
+              grpc_metadata_batch_add_head(
+                  op->payload->send_initial_metadata.send_initial_metadata,
+                  &calld->status, GRPC_MDELEM_STATUS_200));
+    add_error(error_name, &error,
+              grpc_metadata_batch_add_tail(
+                  op->payload->send_initial_metadata.send_initial_metadata,
+                  &calld->content_type,
+                  GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC));
     add_error(
         error_name, &error,
-        grpc_metadata_batch_add_head(
-            exec_ctx, op->payload->send_initial_metadata.send_initial_metadata,
-            &calld->status, GRPC_MDELEM_STATUS_200));
-    add_error(
-        error_name, &error,
-        grpc_metadata_batch_add_tail(
-            exec_ctx, op->payload->send_initial_metadata.send_initial_metadata,
-            &calld->content_type,
-            GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC));
-    add_error(error_name, &error,
-              server_filter_outgoing_metadata(
-                  exec_ctx, elem,
-                  op->payload->send_initial_metadata.send_initial_metadata));
+        server_filter_outgoing_metadata(
+            elem, op->payload->send_initial_metadata.send_initial_metadata));
     if (error != GRPC_ERROR_NONE) return error;
   }
 
@@ -367,8 +356,7 @@ static grpc_error* hs_mutate_op(grpc_exec_ctx* exec_ctx,
 
   if (op->send_trailing_metadata) {
     grpc_error* error = server_filter_outgoing_metadata(
-        exec_ctx, elem,
-        op->payload->send_trailing_metadata.send_trailing_metadata);
+        elem, op->payload->send_trailing_metadata.send_trailing_metadata);
     if (error != GRPC_ERROR_NONE) return error;
   }
 
@@ -376,23 +364,21 @@ static grpc_error* hs_mutate_op(grpc_exec_ctx* exec_ctx,
 }
 
 static void hs_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   call_data* calld = (call_data*)elem->call_data;
   GPR_TIMER_BEGIN("hs_start_transport_stream_op_batch", 0);
-  grpc_error* error = hs_mutate_op(exec_ctx, elem, op);
+  grpc_error* error = hs_mutate_op(elem, op);
   if (error != GRPC_ERROR_NONE) {
-    grpc_transport_stream_op_batch_finish_with_failure(exec_ctx, op, error,
+    grpc_transport_stream_op_batch_finish_with_failure(op, error,
                                                        calld->call_combiner);
   } else {
-    grpc_call_next_op(exec_ctx, elem, op);
+    grpc_call_next_op(elem, op);
   }
   GPR_TIMER_END("hs_start_transport_stream_op_batch", 0);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   /* grab pointers to our data from the call element */
   call_data* calld = (call_data*)elem->call_data;
@@ -409,24 +395,22 @@ static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   call_data* calld = (call_data*)elem->call_data;
-  grpc_slice_buffer_destroy_internal(exec_ctx, &calld->read_slice_buffer);
+  grpc_slice_buffer_destroy_internal(&calld->read_slice_buffer);
 }
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
   return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 const grpc_channel_filter grpc_http_server_filter = {
     hs_start_transport_stream_op_batch,
diff --git a/src/core/ext/filters/load_reporting/server_load_reporting_filter.cc b/src/core/ext/filters/load_reporting/server_load_reporting_filter.cc
index 762198f034..f50a928fcd 100644
--- a/src/core/ext/filters/load_reporting/server_load_reporting_filter.cc
+++ b/src/core/ext/filters/load_reporting/server_load_reporting_filter.cc
@@ -54,8 +54,7 @@ typedef struct channel_data {
   intptr_t id; /**< an id unique to the channel */
 } channel_data;
 
-static void on_initial_md_ready(grpc_exec_ctx* exec_ctx, void* user_data,
-                                grpc_error* err) {
+static void on_initial_md_ready(void* user_data, grpc_error* err) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
 
@@ -73,20 +72,19 @@ static void on_initial_md_ready(grpc_exec_ctx* exec_ctx, void* user_data,
           GRPC_MDVALUE(calld->recv_initial_metadata->idx.named.lb_token->md));
       calld->have_initial_md_string = true;
       grpc_metadata_batch_remove(
-          exec_ctx, calld->recv_initial_metadata,
+          calld->recv_initial_metadata,
           calld->recv_initial_metadata->idx.named.lb_token);
     }
   } else {
     GRPC_ERROR_REF(err);
   }
   calld->ops_recv_initial_metadata_ready->cb(
-      exec_ctx, calld->ops_recv_initial_metadata_ready->cb_arg, err);
+      calld->ops_recv_initial_metadata_ready->cb_arg, err);
   GRPC_ERROR_UNREF(err);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   calld->id = (intptr_t)args->call_stack;
@@ -108,7 +106,7 @@ static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   call_data* calld = (call_data*)elem->call_data;
@@ -125,19 +123,18 @@ static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
   */
 
   if (calld->have_initial_md_string) {
-    grpc_slice_unref_internal(exec_ctx, calld->initial_md_string);
+    grpc_slice_unref_internal(calld->initial_md_string);
   }
   if (calld->have_trailing_md_string) {
-    grpc_slice_unref_internal(exec_ctx, calld->trailing_md_string);
+    grpc_slice_unref_internal(calld->trailing_md_string);
   }
   if (calld->have_service_method) {
-    grpc_slice_unref_internal(exec_ctx, calld->service_method);
+    grpc_slice_unref_internal(calld->service_method);
   }
 }
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
 
@@ -158,8 +155,7 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
 }
 
 /* Destructor for channel data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   /* TODO(dgq): do something with the data
   channel_data *chand = elem->channel_data;
   grpc_load_reporting_call_data lr_call_data = {
@@ -173,8 +169,7 @@ static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
   */
 }
 
-static grpc_filtered_mdelem lr_trailing_md_filter(grpc_exec_ctx* exec_ctx,
-                                                  void* user_data,
+static grpc_filtered_mdelem lr_trailing_md_filter(void* user_data,
                                                   grpc_mdelem md) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -186,8 +181,7 @@ static grpc_filtered_mdelem lr_trailing_md_filter(grpc_exec_ctx* exec_ctx,
 }
 
 static void lr_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   GPR_TIMER_BEGIN("lr_start_transport_stream_op_batch", 0);
   call_data* calld = (call_data*)elem->call_data;
 
@@ -203,12 +197,11 @@ static void lr_start_transport_stream_op_batch(
     GRPC_LOG_IF_ERROR(
         "grpc_metadata_batch_filter",
         grpc_metadata_batch_filter(
-            exec_ctx,
             op->payload->send_trailing_metadata.send_trailing_metadata,
             lr_trailing_md_filter, elem,
             "LR trailing metadata filtering error"));
   }
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 
   GPR_TIMER_END("lr_start_transport_stream_op_batch", 0);
 }
diff --git a/src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc b/src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc
index accb7797dd..9d1dfcbb4c 100644
--- a/src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc
+++ b/src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc
@@ -38,7 +38,7 @@ static bool is_load_reporting_enabled(const grpc_channel_args* a) {
 }
 
 static bool maybe_add_server_load_reporting_filter(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, void* arg) {
+    grpc_channel_stack_builder* builder, void* arg) {
   const grpc_channel_args* args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
   const grpc_channel_filter* filter = (const grpc_channel_filter*)arg;
diff --git a/src/core/ext/filters/max_age/max_age_filter.cc b/src/core/ext/filters/max_age/max_age_filter.cc
index 917fbd9198..0499c6ecfc 100644
--- a/src/core/ext/filters/max_age/max_age_filter.cc
+++ b/src/core/ext/filters/max_age/max_age_filter.cc
@@ -88,73 +88,69 @@ typedef struct channel_data {
 
 /* Increase the nubmer of active calls. Before the increasement, if there are no
    calls, the max_idle_timer should be cancelled. */
-static void increase_call_count(grpc_exec_ctx* exec_ctx, channel_data* chand) {
+static void increase_call_count(channel_data* chand) {
   if (gpr_atm_full_fetch_add(&chand->call_count, 1) == 0) {
-    grpc_timer_cancel(exec_ctx, &chand->max_idle_timer);
+    grpc_timer_cancel(&chand->max_idle_timer);
   }
 }
 
 /* Decrease the nubmer of active calls. After the decrement, if there are no
    calls, the max_idle_timer should be started. */
-static void decrease_call_count(grpc_exec_ctx* exec_ctx, channel_data* chand) {
+static void decrease_call_count(channel_data* chand) {
   if (gpr_atm_full_fetch_add(&chand->call_count, -1) == 1) {
     GRPC_CHANNEL_STACK_REF(chand->channel_stack, "max_age max_idle_timer");
-    grpc_timer_init(exec_ctx, &chand->max_idle_timer,
-                    grpc_exec_ctx_now(exec_ctx) + chand->max_connection_idle,
-                    &chand->close_max_idle_channel);
+    grpc_timer_init(
+        &chand->max_idle_timer,
+        grpc_core::ExecCtx::Get()->Now() + chand->max_connection_idle,
+        &chand->close_max_idle_channel);
   }
 }
 
-static void start_max_idle_timer_after_init(grpc_exec_ctx* exec_ctx, void* arg,
-                                            grpc_error* error) {
+static void start_max_idle_timer_after_init(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   /* Decrease call_count. If there are no active calls at this time,
      max_idle_timer will start here. If the number of active calls is not 0,
      max_idle_timer will start after all the active calls end. */
-  decrease_call_count(exec_ctx, chand);
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->channel_stack,
+  decrease_call_count(chand);
+  GRPC_CHANNEL_STACK_UNREF(chand->channel_stack,
                            "max_age start_max_idle_timer_after_init");
 }
 
-static void start_max_age_timer_after_init(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void start_max_age_timer_after_init(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   gpr_mu_lock(&chand->max_age_timer_mu);
   chand->max_age_timer_pending = true;
   GRPC_CHANNEL_STACK_REF(chand->channel_stack, "max_age max_age_timer");
-  grpc_timer_init(exec_ctx, &chand->max_age_timer,
-                  grpc_exec_ctx_now(exec_ctx) + chand->max_connection_age,
+  grpc_timer_init(&chand->max_age_timer,
+                  grpc_core::ExecCtx::Get()->Now() + chand->max_connection_age,
                   &chand->close_max_age_channel);
   gpr_mu_unlock(&chand->max_age_timer_mu);
   grpc_transport_op* op = grpc_make_transport_op(nullptr);
   op->on_connectivity_state_change = &chand->channel_connectivity_changed;
   op->connectivity_state = &chand->connectivity_state;
-  grpc_channel_next_op(exec_ctx,
-                       grpc_channel_stack_element(chand->channel_stack, 0), op);
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->channel_stack,
+  grpc_channel_next_op(grpc_channel_stack_element(chand->channel_stack, 0), op);
+  GRPC_CHANNEL_STACK_UNREF(chand->channel_stack,
                            "max_age start_max_age_timer_after_init");
 }
 
-static void start_max_age_grace_timer_after_goaway_op(grpc_exec_ctx* exec_ctx,
-                                                      void* arg,
+static void start_max_age_grace_timer_after_goaway_op(void* arg,
                                                       grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   gpr_mu_lock(&chand->max_age_timer_mu);
   chand->max_age_grace_timer_pending = true;
   GRPC_CHANNEL_STACK_REF(chand->channel_stack, "max_age max_age_grace_timer");
   grpc_timer_init(
-      exec_ctx, &chand->max_age_grace_timer,
+      &chand->max_age_grace_timer,
       chand->max_connection_age_grace == GRPC_MILLIS_INF_FUTURE
           ? GRPC_MILLIS_INF_FUTURE
-          : grpc_exec_ctx_now(exec_ctx) + chand->max_connection_age_grace,
+          : grpc_core::ExecCtx::Get()->Now() + chand->max_connection_age_grace,
       &chand->force_close_max_age_channel);
   gpr_mu_unlock(&chand->max_age_timer_mu);
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->channel_stack,
+  GRPC_CHANNEL_STACK_UNREF(chand->channel_stack,
                            "max_age start_max_age_grace_timer_after_goaway_op");
 }
 
-static void close_max_idle_channel(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void close_max_idle_channel(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   if (error == GRPC_ERROR_NONE) {
     /* Prevent the max idle timer from being set again */
@@ -165,16 +161,14 @@ static void close_max_idle_channel(grpc_exec_ctx* exec_ctx, void* arg,
                            GRPC_ERROR_INT_HTTP2_ERROR, GRPC_HTTP2_NO_ERROR);
     grpc_channel_element* elem =
         grpc_channel_stack_element(chand->channel_stack, 0);
-    elem->filter->start_transport_op(exec_ctx, elem, op);
+    elem->filter->start_transport_op(elem, op);
   } else if (error != GRPC_ERROR_CANCELLED) {
     GRPC_LOG_IF_ERROR("close_max_idle_channel", error);
   }
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->channel_stack,
-                           "max_age max_idle_timer");
+  GRPC_CHANNEL_STACK_UNREF(chand->channel_stack, "max_age max_idle_timer");
 }
 
-static void close_max_age_channel(grpc_exec_ctx* exec_ctx, void* arg,
-                                  grpc_error* error) {
+static void close_max_age_channel(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   gpr_mu_lock(&chand->max_age_timer_mu);
   chand->max_age_timer_pending = false;
@@ -189,16 +183,14 @@ static void close_max_age_channel(grpc_exec_ctx* exec_ctx, void* arg,
                            GRPC_ERROR_INT_HTTP2_ERROR, GRPC_HTTP2_NO_ERROR);
     grpc_channel_element* elem =
         grpc_channel_stack_element(chand->channel_stack, 0);
-    elem->filter->start_transport_op(exec_ctx, elem, op);
+    elem->filter->start_transport_op(elem, op);
   } else if (error != GRPC_ERROR_CANCELLED) {
     GRPC_LOG_IF_ERROR("close_max_age_channel", error);
   }
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->channel_stack,
-                           "max_age max_age_timer");
+  GRPC_CHANNEL_STACK_UNREF(chand->channel_stack, "max_age max_age_timer");
 }
 
-static void force_close_max_age_channel(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void force_close_max_age_channel(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   gpr_mu_lock(&chand->max_age_timer_mu);
   chand->max_age_grace_timer_pending = false;
@@ -209,38 +201,36 @@ static void force_close_max_age_channel(grpc_exec_ctx* exec_ctx, void* arg,
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel reaches max age");
     grpc_channel_element* elem =
         grpc_channel_stack_element(chand->channel_stack, 0);
-    elem->filter->start_transport_op(exec_ctx, elem, op);
+    elem->filter->start_transport_op(elem, op);
   } else if (error != GRPC_ERROR_CANCELLED) {
     GRPC_LOG_IF_ERROR("force_close_max_age_channel", error);
   }
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->channel_stack,
-                           "max_age max_age_grace_timer");
+  GRPC_CHANNEL_STACK_UNREF(chand->channel_stack, "max_age max_age_grace_timer");
 }
 
-static void channel_connectivity_changed(grpc_exec_ctx* exec_ctx, void* arg,
-                                         grpc_error* error) {
+static void channel_connectivity_changed(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   if (chand->connectivity_state != GRPC_CHANNEL_SHUTDOWN) {
     grpc_transport_op* op = grpc_make_transport_op(nullptr);
     op->on_connectivity_state_change = &chand->channel_connectivity_changed;
     op->connectivity_state = &chand->connectivity_state;
-    grpc_channel_next_op(
-        exec_ctx, grpc_channel_stack_element(chand->channel_stack, 0), op);
+    grpc_channel_next_op(grpc_channel_stack_element(chand->channel_stack, 0),
+                         op);
   } else {
     gpr_mu_lock(&chand->max_age_timer_mu);
     if (chand->max_age_timer_pending) {
-      grpc_timer_cancel(exec_ctx, &chand->max_age_timer);
+      grpc_timer_cancel(&chand->max_age_timer);
       chand->max_age_timer_pending = false;
     }
     if (chand->max_age_grace_timer_pending) {
-      grpc_timer_cancel(exec_ctx, &chand->max_age_grace_timer);
+      grpc_timer_cancel(&chand->max_age_grace_timer);
       chand->max_age_grace_timer_pending = false;
     }
     gpr_mu_unlock(&chand->max_age_timer_mu);
     /* If there are no active calls, this increasement will cancel
        max_idle_timer, and prevent max_idle_timer from being started in the
        future. */
-    increase_call_count(exec_ctx, chand);
+    increase_call_count(chand);
   }
 }
 
@@ -263,25 +253,23 @@ add_random_max_connection_age_jitter_and_convert_to_grpc_millis(int value) {
 }
 
 /* Constructor for call_data. */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   channel_data* chand = (channel_data*)elem->channel_data;
-  increase_call_count(exec_ctx, chand);
+  increase_call_count(chand);
   return GRPC_ERROR_NONE;
 }
 
 /* Destructor for call_data. */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   channel_data* chand = (channel_data*)elem->channel_data;
-  decrease_call_count(exec_ctx, chand);
+  decrease_call_count(chand);
 }
 
 /* Constructor for channel_data. */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   channel_data* chand = (channel_data*)elem->channel_data;
   gpr_mu_init(&chand->max_age_timer_mu);
@@ -351,8 +339,7 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
        initialization is done. */
     GRPC_CHANNEL_STACK_REF(chand->channel_stack,
                            "max_age start_max_age_timer_after_init");
-    GRPC_CLOSURE_SCHED(exec_ctx, &chand->start_max_age_timer_after_init,
-                       GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&chand->start_max_age_timer_after_init, GRPC_ERROR_NONE);
   }
 
   /* Initialize the number of calls as 1, so that the max_idle_timer will not
@@ -361,15 +348,14 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
   if (chand->max_connection_idle != GRPC_MILLIS_INF_FUTURE) {
     GRPC_CHANNEL_STACK_REF(chand->channel_stack,
                            "max_age start_max_idle_timer_after_init");
-    GRPC_CLOSURE_SCHED(exec_ctx, &chand->start_max_idle_timer_after_init,
+    GRPC_CLOSURE_SCHED(&chand->start_max_idle_timer_after_init,
                        GRPC_ERROR_NONE);
   }
   return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel_data. */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 const grpc_channel_filter grpc_max_age_filter = {
     grpc_call_next_op,
@@ -384,8 +370,7 @@ const grpc_channel_filter grpc_max_age_filter = {
     grpc_channel_next_get_info,
     "max_age"};
 
-static bool maybe_add_max_age_filter(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_stack_builder* builder,
+static bool maybe_add_max_age_filter(grpc_channel_stack_builder* builder,
                                      void* arg) {
   const grpc_channel_args* channel_args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
diff --git a/src/core/ext/filters/message_size/message_size_filter.cc b/src/core/ext/filters/message_size/message_size_filter.cc
index 3d2252af2e..f8487f9a9e 100644
--- a/src/core/ext/filters/message_size/message_size_filter.cc
+++ b/src/core/ext/filters/message_size/message_size_filter.cc
@@ -47,8 +47,7 @@ static void* refcounted_message_size_limits_ref(void* value) {
   return value;
 }
 
-static void refcounted_message_size_limits_unref(grpc_exec_ctx* exec_ctx,
-                                                 void* value) {
+static void refcounted_message_size_limits_unref(void* value) {
   refcounted_message_size_limits* limits =
       (refcounted_message_size_limits*)value;
   if (gpr_unref(&limits->refs)) {
@@ -108,8 +107,7 @@ typedef struct channel_data {
 
 // Callback invoked when we receive a message.  Here we check the max
 // receive message size.
-static void recv_message_ready(grpc_exec_ctx* exec_ctx, void* user_data,
-                               grpc_error* error) {
+static void recv_message_ready(void* user_data, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
   if (*calld->recv_message != nullptr && calld->limits.max_recv_size >= 0 &&
@@ -132,13 +130,12 @@ static void recv_message_ready(grpc_exec_ctx* exec_ctx, void* user_data,
     GRPC_ERROR_REF(error);
   }
   // Invoke the next callback.
-  GRPC_CLOSURE_RUN(exec_ctx, calld->next_recv_message_ready, error);
+  GRPC_CLOSURE_RUN(calld->next_recv_message_ready, error);
 }
 
 // Start transport stream op.
 static void start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   call_data* calld = (call_data*)elem->call_data;
   // Check max send message size.
   if (op->send_message && calld->limits.max_send_size >= 0 &&
@@ -149,7 +146,7 @@ static void start_transport_stream_op_batch(
                  op->payload->send_message.send_message->length,
                  calld->limits.max_send_size);
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, op,
+        op,
         grpc_error_set_int(GRPC_ERROR_CREATE_FROM_COPIED_STRING(message_string),
                            GRPC_ERROR_INT_GRPC_STATUS,
                            GRPC_STATUS_RESOURCE_EXHAUSTED),
@@ -165,12 +162,11 @@ static void start_transport_stream_op_batch(
     op->payload->recv_message.recv_message_ready = &calld->recv_message_ready;
   }
   // Chain to the next filter.
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 }
 
 // Constructor for call_data.
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -186,7 +182,7 @@ static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
   if (chand->method_limit_table != nullptr) {
     refcounted_message_size_limits* limits =
         (refcounted_message_size_limits*)grpc_method_config_table_get(
-            exec_ctx, chand->method_limit_table, args->path);
+            chand->method_limit_table, args->path);
     if (limits != nullptr) {
       if (limits->limits.max_send_size >= 0 &&
           (limits->limits.max_send_size < calld->limits.max_send_size ||
@@ -204,7 +200,7 @@ static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
 }
 
 // Destructor for call_data.
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
@@ -241,8 +237,7 @@ message_size_limits get_message_size_limits(
 }
 
 // Constructor for channel_data.
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -257,8 +252,7 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
     if (service_config != nullptr) {
       chand->method_limit_table =
           grpc_service_config_create_method_config_table(
-              exec_ctx, service_config,
-              refcounted_message_size_limits_create_from_json,
+              service_config, refcounted_message_size_limits_create_from_json,
               refcounted_message_size_limits_ref,
               refcounted_message_size_limits_unref);
       grpc_service_config_destroy(service_config);
@@ -268,10 +262,9 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
 }
 
 // Destructor for channel_data.
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
-  grpc_slice_hash_table_unref(exec_ctx, chand->method_limit_table);
+  grpc_slice_hash_table_unref(chand->method_limit_table);
 }
 
 const grpc_channel_filter grpc_message_size_filter = {
@@ -287,8 +280,7 @@ const grpc_channel_filter grpc_message_size_filter = {
     grpc_channel_next_get_info,
     "message_size"};
 
-static bool maybe_add_message_size_filter(grpc_exec_ctx* exec_ctx,
-                                          grpc_channel_stack_builder* builder,
+static bool maybe_add_message_size_filter(grpc_channel_stack_builder* builder,
                                           void* arg) {
   const grpc_channel_args* channel_args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
diff --git a/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc b/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc
index 4ab1ee4e79..555a9134a2 100644
--- a/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc
+++ b/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc
@@ -50,8 +50,7 @@ static bool get_user_agent_mdelem(const grpc_metadata_batch* batch,
 }
 
 // Callback invoked when we receive an initial metadata.
-static void recv_initial_metadata_ready(grpc_exec_ctx* exec_ctx,
-                                        void* user_data, grpc_error* error) {
+static void recv_initial_metadata_ready(void* user_data, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
 
@@ -67,14 +66,13 @@ static void recv_initial_metadata_ready(grpc_exec_ctx* exec_ctx,
   }
 
   // Invoke the next callback.
-  GRPC_CLOSURE_RUN(exec_ctx, calld->next_recv_initial_metadata_ready,
+  GRPC_CLOSURE_RUN(calld->next_recv_initial_metadata_ready,
                    GRPC_ERROR_REF(error));
 }
 
 // Start transport stream op.
 static void start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   call_data* calld = (call_data*)elem->call_data;
 
   // Inject callback for receiving initial metadata
@@ -96,12 +94,11 @@ static void start_transport_stream_op_batch(
   }
 
   // Chain to the next filter.
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 }
 
 // Constructor for call_data.
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   calld->next_recv_initial_metadata_ready = nullptr;
@@ -113,20 +110,18 @@ static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
 }
 
 // Destructor for call_data.
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
 // Constructor for channel_data.
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
 // Destructor for channel_data.
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 // Parse the user agent
 static bool parse_user_agent(grpc_mdelem md) {
@@ -181,7 +176,7 @@ const grpc_channel_filter grpc_workaround_cronet_compression_filter = {
     "workaround_cronet_compression"};
 
 static bool register_workaround_cronet_compression(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, void* arg) {
+    grpc_channel_stack_builder* builder, void* arg) {
   const grpc_channel_args* channel_args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
   const grpc_arg* a = grpc_channel_args_find(
diff --git a/src/core/ext/transport/chttp2/client/chttp2_connector.cc b/src/core/ext/transport/chttp2/client/chttp2_connector.cc
index 819f66aec3..db5962e7fd 100644
--- a/src/core/ext/transport/chttp2/client/chttp2_connector.cc
+++ b/src/core/ext/transport/chttp2/client/chttp2_connector.cc
@@ -61,38 +61,34 @@ static void chttp2_connector_ref(grpc_connector* con) {
   gpr_ref(&c->refs);
 }
 
-static void chttp2_connector_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_connector* con) {
+static void chttp2_connector_unref(grpc_connector* con) {
   chttp2_connector* c = (chttp2_connector*)con;
   if (gpr_unref(&c->refs)) {
     gpr_mu_destroy(&c->mu);
     // If handshaking is not yet in progress, destroy the endpoint.
     // Otherwise, the handshaker will do this for us.
-    if (c->endpoint != nullptr) grpc_endpoint_destroy(exec_ctx, c->endpoint);
+    if (c->endpoint != nullptr) grpc_endpoint_destroy(c->endpoint);
     gpr_free(c);
   }
 }
 
-static void chttp2_connector_shutdown(grpc_exec_ctx* exec_ctx,
-                                      grpc_connector* con, grpc_error* why) {
+static void chttp2_connector_shutdown(grpc_connector* con, grpc_error* why) {
   chttp2_connector* c = (chttp2_connector*)con;
   gpr_mu_lock(&c->mu);
   c->shutdown = true;
   if (c->handshake_mgr != nullptr) {
-    grpc_handshake_manager_shutdown(exec_ctx, c->handshake_mgr,
-                                    GRPC_ERROR_REF(why));
+    grpc_handshake_manager_shutdown(c->handshake_mgr, GRPC_ERROR_REF(why));
   }
   // If handshaking is not yet in progress, shutdown the endpoint.
   // Otherwise, the handshaker will do this for us.
   if (!c->connecting && c->endpoint != nullptr) {
-    grpc_endpoint_shutdown(exec_ctx, c->endpoint, GRPC_ERROR_REF(why));
+    grpc_endpoint_shutdown(c->endpoint, GRPC_ERROR_REF(why));
   }
   gpr_mu_unlock(&c->mu);
   GRPC_ERROR_UNREF(why);
 }
 
-static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* error) {
+static void on_handshake_done(void* arg, grpc_error* error) {
   grpc_handshaker_args* args = (grpc_handshaker_args*)arg;
   chttp2_connector* c = (chttp2_connector*)args->user_data;
   gpr_mu_lock(&c->mu);
@@ -105,20 +101,20 @@ static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
       // before destroying them, even if we know that there are no
       // pending read/write callbacks.  This should be fixed, at which
       // point this can be removed.
-      grpc_endpoint_shutdown(exec_ctx, args->endpoint, GRPC_ERROR_REF(error));
-      grpc_endpoint_destroy(exec_ctx, args->endpoint);
-      grpc_channel_args_destroy(exec_ctx, args->args);
-      grpc_slice_buffer_destroy_internal(exec_ctx, args->read_buffer);
+      grpc_endpoint_shutdown(args->endpoint, GRPC_ERROR_REF(error));
+      grpc_endpoint_destroy(args->endpoint);
+      grpc_channel_args_destroy(args->args);
+      grpc_slice_buffer_destroy_internal(args->read_buffer);
       gpr_free(args->read_buffer);
     } else {
       error = GRPC_ERROR_REF(error);
     }
     memset(c->result, 0, sizeof(*c->result));
   } else {
-    grpc_endpoint_delete_from_pollset_set(exec_ctx, args->endpoint,
+    grpc_endpoint_delete_from_pollset_set(args->endpoint,
                                           c->args.interested_parties);
-    c->result->transport = grpc_create_chttp2_transport(exec_ctx, args->args,
-                                                        args->endpoint, true);
+    c->result->transport =
+        grpc_create_chttp2_transport(args->args, args->endpoint, true);
     GPR_ASSERT(c->result->transport);
     // TODO(roth): We ideally want to wait until we receive HTTP/2
     // settings from the server before we consider the connection
@@ -144,34 +140,32 @@ static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
     // so until after transparent retries is implemented.  Otherwise, any
     // RPC that we attempt to send on the connection before the timeout
     // would fail instead of being retried on a subsequent attempt.
-    grpc_chttp2_transport_start_reading(exec_ctx, c->result->transport,
-                                        args->read_buffer, nullptr);
+    grpc_chttp2_transport_start_reading(c->result->transport, args->read_buffer,
+                                        nullptr);
     c->result->channel_args = args->args;
   }
   grpc_closure* notify = c->notify;
   c->notify = nullptr;
-  GRPC_CLOSURE_SCHED(exec_ctx, notify, error);
-  grpc_handshake_manager_destroy(exec_ctx, c->handshake_mgr);
+  GRPC_CLOSURE_SCHED(notify, error);
+  grpc_handshake_manager_destroy(c->handshake_mgr);
   c->handshake_mgr = nullptr;
   gpr_mu_unlock(&c->mu);
-  chttp2_connector_unref(exec_ctx, (grpc_connector*)c);
+  chttp2_connector_unref((grpc_connector*)c);
 }
 
-static void start_handshake_locked(grpc_exec_ctx* exec_ctx,
-                                   chttp2_connector* c) {
+static void start_handshake_locked(chttp2_connector* c) {
   c->handshake_mgr = grpc_handshake_manager_create();
-  grpc_handshakers_add(exec_ctx, HANDSHAKER_CLIENT, c->args.channel_args,
+  grpc_handshakers_add(HANDSHAKER_CLIENT, c->args.channel_args,
                        c->handshake_mgr);
-  grpc_endpoint_add_to_pollset_set(exec_ctx, c->endpoint,
-                                   c->args.interested_parties);
+  grpc_endpoint_add_to_pollset_set(c->endpoint, c->args.interested_parties);
   grpc_handshake_manager_do_handshake(
-      exec_ctx, c->handshake_mgr, c->args.interested_parties, c->endpoint,
+      c->handshake_mgr, c->args.interested_parties, c->endpoint,
       c->args.channel_args, c->args.deadline, nullptr /* acceptor */,
       on_handshake_done, c);
   c->endpoint = nullptr;  // Endpoint handed off to handshake manager.
 }
 
-static void connected(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void connected(void* arg, grpc_error* error) {
   chttp2_connector* c = (chttp2_connector*)arg;
   gpr_mu_lock(&c->mu);
   GPR_ASSERT(c->connecting);
@@ -185,27 +179,26 @@ static void connected(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
     memset(c->result, 0, sizeof(*c->result));
     grpc_closure* notify = c->notify;
     c->notify = nullptr;
-    GRPC_CLOSURE_SCHED(exec_ctx, notify, error);
+    GRPC_CLOSURE_SCHED(notify, error);
     if (c->endpoint != nullptr) {
-      grpc_endpoint_shutdown(exec_ctx, c->endpoint, GRPC_ERROR_REF(error));
+      grpc_endpoint_shutdown(c->endpoint, GRPC_ERROR_REF(error));
     }
     gpr_mu_unlock(&c->mu);
-    chttp2_connector_unref(exec_ctx, (grpc_connector*)arg);
+    chttp2_connector_unref((grpc_connector*)arg);
   } else {
     GPR_ASSERT(c->endpoint != nullptr);
-    start_handshake_locked(exec_ctx, c);
+    start_handshake_locked(c);
     gpr_mu_unlock(&c->mu);
   }
 }
 
-static void chttp2_connector_connect(grpc_exec_ctx* exec_ctx,
-                                     grpc_connector* con,
+static void chttp2_connector_connect(grpc_connector* con,
                                      const grpc_connect_in_args* args,
                                      grpc_connect_out_args* result,
                                      grpc_closure* notify) {
   chttp2_connector* c = (chttp2_connector*)con;
   grpc_resolved_address addr;
-  grpc_get_subchannel_address_arg(exec_ctx, args->channel_args, &addr);
+  grpc_get_subchannel_address_arg(args->channel_args, &addr);
   gpr_mu_lock(&c->mu);
   GPR_ASSERT(c->notify == nullptr);
   c->notify = notify;
@@ -216,9 +209,8 @@ static void chttp2_connector_connect(grpc_exec_ctx* exec_ctx,
   GRPC_CLOSURE_INIT(&c->connected, connected, c, grpc_schedule_on_exec_ctx);
   GPR_ASSERT(!c->connecting);
   c->connecting = true;
-  grpc_tcp_client_connect(exec_ctx, &c->connected, &c->endpoint,
-                          args->interested_parties, args->channel_args, &addr,
-                          args->deadline);
+  grpc_tcp_client_connect(&c->connected, &c->endpoint, args->interested_parties,
+                          args->channel_args, &addr, args->deadline);
   gpr_mu_unlock(&c->mu);
 }
 
diff --git a/src/core/ext/transport/chttp2/client/insecure/channel_create.cc b/src/core/ext/transport/chttp2/client/insecure/channel_create.cc
index 028b69e5ff..6a1b70964d 100644
--- a/src/core/ext/transport/chttp2/client/insecure/channel_create.cc
+++ b/src/core/ext/transport/chttp2/client/insecure/channel_create.cc
@@ -34,21 +34,19 @@ static void client_channel_factory_ref(
     grpc_client_channel_factory* cc_factory) {}
 
 static void client_channel_factory_unref(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* cc_factory) {}
+    grpc_client_channel_factory* cc_factory) {}
 
 static grpc_subchannel* client_channel_factory_create_subchannel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* cc_factory,
-    const grpc_subchannel_args* args) {
+    grpc_client_channel_factory* cc_factory, const grpc_subchannel_args* args) {
   grpc_connector* connector = grpc_chttp2_connector_create();
-  grpc_subchannel* s = grpc_subchannel_create(exec_ctx, connector, args);
-  grpc_connector_unref(exec_ctx, connector);
+  grpc_subchannel* s = grpc_subchannel_create(connector, args);
+  grpc_connector_unref(connector);
   return s;
 }
 
 static grpc_channel* client_channel_factory_create_channel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* cc_factory,
-    const char* target, grpc_client_channel_type type,
-    const grpc_channel_args* args) {
+    grpc_client_channel_factory* cc_factory, const char* target,
+    grpc_client_channel_type type, const grpc_channel_args* args) {
   if (target == nullptr) {
     gpr_log(GPR_ERROR, "cannot create channel with NULL target name");
     return nullptr;
@@ -56,14 +54,14 @@ static grpc_channel* client_channel_factory_create_channel(
   // Add channel arg containing the server URI.
   grpc_arg arg = grpc_channel_arg_string_create(
       (char*)GRPC_ARG_SERVER_URI,
-      grpc_resolver_factory_add_default_prefix_if_needed(exec_ctx, target));
+      grpc_resolver_factory_add_default_prefix_if_needed(target));
   const char* to_remove[] = {GRPC_ARG_SERVER_URI};
   grpc_channel_args* new_args =
       grpc_channel_args_copy_and_add_and_remove(args, to_remove, 1, &arg, 1);
   gpr_free(arg.value.string);
-  grpc_channel* channel = grpc_channel_create(exec_ctx, target, new_args,
-                                              GRPC_CLIENT_CHANNEL, nullptr);
-  grpc_channel_args_destroy(exec_ctx, new_args);
+  grpc_channel* channel =
+      grpc_channel_create(target, new_args, GRPC_CLIENT_CHANNEL, nullptr);
+  grpc_channel_args_destroy(new_args);
   return channel;
 }
 
@@ -82,7 +80,7 @@ static grpc_client_channel_factory client_channel_factory = {
 grpc_channel* grpc_insecure_channel_create(const char* target,
                                            const grpc_channel_args* args,
                                            void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_API_TRACE(
       "grpc_insecure_channel_create(target=%s, args=%p, reserved=%p)", 3,
       (target, args, reserved));
@@ -93,11 +91,11 @@ grpc_channel* grpc_insecure_channel_create(const char* target,
   grpc_channel_args* new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
   // Create channel.
   grpc_channel* channel = client_channel_factory_create_channel(
-      &exec_ctx, &client_channel_factory, target,
-      GRPC_CLIENT_CHANNEL_TYPE_REGULAR, new_args);
+      &client_channel_factory, target, GRPC_CLIENT_CHANNEL_TYPE_REGULAR,
+      new_args);
   // Clean up.
-  grpc_channel_args_destroy(&exec_ctx, new_args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_args_destroy(new_args);
+
   return channel != nullptr ? channel
                             : grpc_lame_client_channel_create(
                                   target, GRPC_STATUS_INTERNAL,
diff --git a/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.cc b/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.cc
index c6b149d0b1..0cdea5a94e 100644
--- a/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.cc
+++ b/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.cc
@@ -37,7 +37,7 @@
 
 grpc_channel* grpc_insecure_channel_create_from_fd(
     const char* target, int fd, const grpc_channel_args* args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_API_TRACE("grpc_insecure_channel_create(target=%p, fd=%d, args=%p)", 3,
                  (target, fd, args));
 
@@ -50,17 +50,17 @@ grpc_channel* grpc_insecure_channel_create_from_fd(
   GPR_ASSERT(fcntl(fd, F_SETFL, flags | O_NONBLOCK) == 0);
 
   grpc_endpoint* client = grpc_tcp_client_create_from_fd(
-      &exec_ctx, grpc_fd_create(fd, "client"), args, "fd-client");
+      grpc_fd_create(fd, "client"), args, "fd-client");
 
   grpc_transport* transport =
-      grpc_create_chttp2_transport(&exec_ctx, final_args, client, true);
+      grpc_create_chttp2_transport(final_args, client, true);
   GPR_ASSERT(transport);
   grpc_channel* channel = grpc_channel_create(
-      &exec_ctx, target, final_args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
-  grpc_channel_args_destroy(&exec_ctx, final_args);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr, nullptr);
+      target, final_args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
+  grpc_channel_args_destroy(final_args);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   return channel != nullptr ? channel
                             : grpc_lame_client_channel_create(
@@ -73,7 +73,7 @@ grpc_channel* grpc_insecure_channel_create_from_fd(
 grpc_channel* grpc_insecure_channel_create_from_fd(
     const char* target, int fd, const grpc_channel_args* args) {
   GPR_ASSERT(0);
-  return NULL;
+  return nullptr;
 }
 
 #endif  // GPR_SUPPORT_CHANNELS_FROM_FD
diff --git a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc
index dd2bc427a7..27c5b96a4c 100644
--- a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc
+++ b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc
@@ -41,10 +41,10 @@ static void client_channel_factory_ref(
     grpc_client_channel_factory* cc_factory) {}
 
 static void client_channel_factory_unref(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* cc_factory) {}
+    grpc_client_channel_factory* cc_factory) {}
 
 static grpc_subchannel_args* get_secure_naming_subchannel_args(
-    grpc_exec_ctx* exec_ctx, const grpc_subchannel_args* args) {
+    const grpc_subchannel_args* args) {
   grpc_channel_credentials* channel_credentials =
       grpc_channel_credentials_find_in_args(args->args);
   if (channel_credentials == nullptr) {
@@ -68,7 +68,7 @@ static grpc_subchannel_args* get_secure_naming_subchannel_args(
   const char* server_uri_str = server_uri_arg->value.string;
   GPR_ASSERT(server_uri_str != nullptr);
   grpc_uri* server_uri =
-      grpc_uri_parse(exec_ctx, server_uri_str, true /* supress errors */);
+      grpc_uri_parse(server_uri_str, true /* supress errors */);
   GPR_ASSERT(server_uri != nullptr);
   const char* server_uri_path;
   server_uri_path =
@@ -81,7 +81,7 @@ static grpc_subchannel_args* get_secure_naming_subchannel_args(
     const char* target_uri_str =
         grpc_get_subchannel_address_uri_arg(args->args);
     grpc_uri* target_uri =
-        grpc_uri_parse(exec_ctx, target_uri_str, false /* suppress errors */);
+        grpc_uri_parse(target_uri_str, false /* suppress errors */);
     GPR_ASSERT(target_uri != nullptr);
     if (target_uri->path[0] != '\0') {  // "path" may be empty
       const grpc_slice key = grpc_slice_from_static_string(
@@ -89,7 +89,7 @@ static grpc_subchannel_args* get_secure_naming_subchannel_args(
       const char* value =
           (const char*)grpc_slice_hash_table_get(targets_info, key);
       if (value != nullptr) target_name_to_check = gpr_strdup(value);
-      grpc_slice_unref_internal(exec_ctx, key);
+      grpc_slice_unref_internal(key);
     }
     if (target_name_to_check == nullptr) {
       // If the target name to check hasn't already been set, fall back to using
@@ -107,7 +107,7 @@ static grpc_subchannel_args* get_secure_naming_subchannel_args(
   grpc_channel_args* new_args_from_connector = nullptr;
   const grpc_security_status security_status =
       grpc_channel_credentials_create_security_connector(
-          exec_ctx, channel_credentials, target_name_to_check, args->args,
+          channel_credentials, target_name_to_check, args->args,
           &subchannel_security_connector, &new_args_from_connector);
   if (security_status != GRPC_SECURITY_OK) {
     gpr_log(GPR_ERROR,
@@ -123,10 +123,10 @@ static grpc_subchannel_args* get_secure_naming_subchannel_args(
   grpc_channel_args* new_args = grpc_channel_args_copy_and_add(
       new_args_from_connector != nullptr ? new_args_from_connector : args->args,
       &new_security_connector_arg, 1);
-  GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, &subchannel_security_connector->base,
+  GRPC_SECURITY_CONNECTOR_UNREF(&subchannel_security_connector->base,
                                 "lb_channel_create");
   if (new_args_from_connector != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, new_args_from_connector);
+    grpc_channel_args_destroy(new_args_from_connector);
   }
   grpc_subchannel_args* final_sc_args =
       (grpc_subchannel_args*)gpr_malloc(sizeof(*final_sc_args));
@@ -136,10 +136,9 @@ static grpc_subchannel_args* get_secure_naming_subchannel_args(
 }
 
 static grpc_subchannel* client_channel_factory_create_subchannel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* cc_factory,
-    const grpc_subchannel_args* args) {
+    grpc_client_channel_factory* cc_factory, const grpc_subchannel_args* args) {
   grpc_subchannel_args* subchannel_args =
-      get_secure_naming_subchannel_args(exec_ctx, args);
+      get_secure_naming_subchannel_args(args);
   if (subchannel_args == nullptr) {
     gpr_log(
         GPR_ERROR,
@@ -147,19 +146,16 @@ static grpc_subchannel* client_channel_factory_create_subchannel(
     return nullptr;
   }
   grpc_connector* connector = grpc_chttp2_connector_create();
-  grpc_subchannel* s =
-      grpc_subchannel_create(exec_ctx, connector, subchannel_args);
-  grpc_connector_unref(exec_ctx, connector);
-  grpc_channel_args_destroy(exec_ctx,
-                            (grpc_channel_args*)subchannel_args->args);
+  grpc_subchannel* s = grpc_subchannel_create(connector, subchannel_args);
+  grpc_connector_unref(connector);
+  grpc_channel_args_destroy((grpc_channel_args*)subchannel_args->args);
   gpr_free(subchannel_args);
   return s;
 }
 
 static grpc_channel* client_channel_factory_create_channel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* cc_factory,
-    const char* target, grpc_client_channel_type type,
-    const grpc_channel_args* args) {
+    grpc_client_channel_factory* cc_factory, const char* target,
+    grpc_client_channel_type type, const grpc_channel_args* args) {
   if (target == nullptr) {
     gpr_log(GPR_ERROR, "cannot create channel with NULL target name");
     return nullptr;
@@ -167,14 +163,14 @@ static grpc_channel* client_channel_factory_create_channel(
   // Add channel arg containing the server URI.
   grpc_arg arg = grpc_channel_arg_string_create(
       (char*)GRPC_ARG_SERVER_URI,
-      grpc_resolver_factory_add_default_prefix_if_needed(exec_ctx, target));
+      grpc_resolver_factory_add_default_prefix_if_needed(target));
   const char* to_remove[] = {GRPC_ARG_SERVER_URI};
   grpc_channel_args* new_args =
       grpc_channel_args_copy_and_add_and_remove(args, to_remove, 1, &arg, 1);
   gpr_free(arg.value.string);
-  grpc_channel* channel = grpc_channel_create(exec_ctx, target, new_args,
-                                              GRPC_CLIENT_CHANNEL, nullptr);
-  grpc_channel_args_destroy(exec_ctx, new_args);
+  grpc_channel* channel =
+      grpc_channel_create(target, new_args, GRPC_CLIENT_CHANNEL, nullptr);
+  grpc_channel_args_destroy(new_args);
   return channel;
 }
 
@@ -194,7 +190,7 @@ grpc_channel* grpc_secure_channel_create(grpc_channel_credentials* creds,
                                          const char* target,
                                          const grpc_channel_args* args,
                                          void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_API_TRACE(
       "grpc_secure_channel_create(creds=%p, target=%s, args=%p, "
       "reserved=%p)",
@@ -211,11 +207,10 @@ grpc_channel* grpc_secure_channel_create(grpc_channel_credentials* creds,
         args, args_to_add, GPR_ARRAY_SIZE(args_to_add));
     // Create channel.
     channel = client_channel_factory_create_channel(
-        &exec_ctx, &client_channel_factory, target,
-        GRPC_CLIENT_CHANNEL_TYPE_REGULAR, new_args);
+        &client_channel_factory, target, GRPC_CLIENT_CHANNEL_TYPE_REGULAR,
+        new_args);
     // Clean up.
-    grpc_channel_args_destroy(&exec_ctx, new_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_channel_args_destroy(new_args);
   }
   return channel != nullptr ? channel
                             : grpc_lame_client_channel_create(
diff --git a/src/core/ext/transport/chttp2/server/chttp2_server.cc b/src/core/ext/transport/chttp2/server/chttp2_server.cc
index 49ee677464..5669fa4090 100644
--- a/src/core/ext/transport/chttp2/server/chttp2_server.cc
+++ b/src/core/ext/transport/chttp2/server/chttp2_server.cc
@@ -69,17 +69,17 @@ typedef struct {
 } server_connection_state;
 
 static void server_connection_state_unref(
-    grpc_exec_ctx* exec_ctx, server_connection_state* connection_state) {
+    server_connection_state* connection_state) {
   if (gpr_unref(&connection_state->refs)) {
     if (connection_state->transport != nullptr) {
-      GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, connection_state->transport,
+      GRPC_CHTTP2_UNREF_TRANSPORT(connection_state->transport,
                                   "receive settings timeout");
     }
     gpr_free(connection_state);
   }
 }
 
-static void on_timeout(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_timeout(void* arg, grpc_error* error) {
   server_connection_state* connection_state = (server_connection_state*)arg;
   // Note that we may be called with GRPC_ERROR_NONE when the timer fires
   // or with an error indicating that the timer system is being shut down.
@@ -87,22 +87,20 @@ static void on_timeout(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
     grpc_transport_op* op = grpc_make_transport_op(nullptr);
     op->disconnect_with_error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
         "Did not receive HTTP/2 settings before handshake timeout");
-    grpc_transport_perform_op(exec_ctx, &connection_state->transport->base, op);
+    grpc_transport_perform_op(&connection_state->transport->base, op);
   }
-  server_connection_state_unref(exec_ctx, connection_state);
+  server_connection_state_unref(connection_state);
 }
 
-static void on_receive_settings(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_error* error) {
+static void on_receive_settings(void* arg, grpc_error* error) {
   server_connection_state* connection_state = (server_connection_state*)arg;
   if (error == GRPC_ERROR_NONE) {
-    grpc_timer_cancel(exec_ctx, &connection_state->timer);
+    grpc_timer_cancel(&connection_state->timer);
   }
-  server_connection_state_unref(exec_ctx, connection_state);
+  server_connection_state_unref(connection_state);
 }
 
-static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* error) {
+static void on_handshake_done(void* arg, grpc_error* error) {
   grpc_handshaker_args* args = (grpc_handshaker_args*)arg;
   server_connection_state* connection_state =
       (server_connection_state*)args->user_data;
@@ -117,10 +115,10 @@ static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
       // before destroying them, even if we know that there are no
       // pending read/write callbacks.  This should be fixed, at which
       // point this can be removed.
-      grpc_endpoint_shutdown(exec_ctx, args->endpoint, GRPC_ERROR_NONE);
-      grpc_endpoint_destroy(exec_ctx, args->endpoint);
-      grpc_channel_args_destroy(exec_ctx, args->args);
-      grpc_slice_buffer_destroy_internal(exec_ctx, args->read_buffer);
+      grpc_endpoint_shutdown(args->endpoint, GRPC_ERROR_NONE);
+      grpc_endpoint_destroy(args->endpoint);
+      grpc_channel_args_destroy(args->args);
+      grpc_slice_buffer_destroy_internal(args->read_buffer);
       gpr_free(args->read_buffer);
     }
   } else {
@@ -128,10 +126,10 @@ static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
     // handshaker may have handed off the connection to some external
     // code, so we can just clean up here without creating a transport.
     if (args->endpoint != nullptr) {
-      grpc_transport* transport = grpc_create_chttp2_transport(
-          exec_ctx, args->args, args->endpoint, false);
+      grpc_transport* transport =
+          grpc_create_chttp2_transport(args->args, args->endpoint, false);
       grpc_server_setup_transport(
-          exec_ctx, connection_state->svr_state->server, transport,
+          connection_state->svr_state->server, transport,
           connection_state->accepting_pollset, args->args);
       // Use notify_on_receive_settings callback to enforce the
       // handshake deadline.
@@ -141,16 +139,14 @@ static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
                         on_receive_settings, connection_state,
                         grpc_schedule_on_exec_ctx);
       grpc_chttp2_transport_start_reading(
-          exec_ctx, transport, args->read_buffer,
-          &connection_state->on_receive_settings);
-      grpc_channel_args_destroy(exec_ctx, args->args);
+          transport, args->read_buffer, &connection_state->on_receive_settings);
+      grpc_channel_args_destroy(args->args);
       gpr_ref(&connection_state->refs);
       GRPC_CHTTP2_REF_TRANSPORT((grpc_chttp2_transport*)transport,
                                 "receive settings timeout");
       GRPC_CLOSURE_INIT(&connection_state->on_timeout, on_timeout,
                         connection_state, grpc_schedule_on_exec_ctx);
-      grpc_timer_init(exec_ctx, &connection_state->timer,
-                      connection_state->deadline,
+      grpc_timer_init(&connection_state->timer, connection_state->deadline,
                       &connection_state->on_timeout);
     }
   }
@@ -158,21 +154,21 @@ static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
       &connection_state->svr_state->pending_handshake_mgrs,
       connection_state->handshake_mgr);
   gpr_mu_unlock(&connection_state->svr_state->mu);
-  grpc_handshake_manager_destroy(exec_ctx, connection_state->handshake_mgr);
+  grpc_handshake_manager_destroy(connection_state->handshake_mgr);
   gpr_free(connection_state->acceptor);
-  grpc_tcp_server_unref(exec_ctx, connection_state->svr_state->tcp_server);
-  server_connection_state_unref(exec_ctx, connection_state);
+  grpc_tcp_server_unref(connection_state->svr_state->tcp_server);
+  server_connection_state_unref(connection_state);
 }
 
-static void on_accept(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
+static void on_accept(void* arg, grpc_endpoint* tcp,
                       grpc_pollset* accepting_pollset,
                       grpc_tcp_server_acceptor* acceptor) {
   server_state* state = (server_state*)arg;
   gpr_mu_lock(&state->mu);
   if (state->shutdown) {
     gpr_mu_unlock(&state->mu);
-    grpc_endpoint_shutdown(exec_ctx, tcp, GRPC_ERROR_NONE);
-    grpc_endpoint_destroy(exec_ctx, tcp);
+    grpc_endpoint_shutdown(tcp, GRPC_ERROR_NONE);
+    grpc_endpoint_destroy(tcp);
     gpr_free(acceptor);
     return;
   }
@@ -188,59 +184,56 @@ static void on_accept(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
   connection_state->accepting_pollset = accepting_pollset;
   connection_state->acceptor = acceptor;
   connection_state->handshake_mgr = handshake_mgr;
-  grpc_handshakers_add(exec_ctx, HANDSHAKER_SERVER, state->args,
+  grpc_handshakers_add(HANDSHAKER_SERVER, state->args,
                        connection_state->handshake_mgr);
   const grpc_arg* timeout_arg =
       grpc_channel_args_find(state->args, GRPC_ARG_SERVER_HANDSHAKE_TIMEOUT_MS);
   connection_state->deadline =
-      grpc_exec_ctx_now(exec_ctx) +
+      grpc_core::ExecCtx::Get()->Now() +
       grpc_channel_arg_get_integer(timeout_arg,
                                    {120 * GPR_MS_PER_SEC, 1, INT_MAX});
-  grpc_handshake_manager_do_handshake(exec_ctx, connection_state->handshake_mgr,
-                                      nullptr /* interested_parties */, tcp,
-                                      state->args, connection_state->deadline,
-                                      acceptor, on_handshake_done,
-                                      connection_state);
+  grpc_handshake_manager_do_handshake(
+      connection_state->handshake_mgr, nullptr /* interested_parties */, tcp,
+      state->args, connection_state->deadline, acceptor, on_handshake_done,
+      connection_state);
 }
 
 /* Server callback: start listening on our ports */
-static void server_start_listener(grpc_exec_ctx* exec_ctx, grpc_server* server,
-                                  void* arg, grpc_pollset** pollsets,
+static void server_start_listener(grpc_server* server, void* arg,
+                                  grpc_pollset** pollsets,
                                   size_t pollset_count) {
   server_state* state = (server_state*)arg;
   gpr_mu_lock(&state->mu);
   state->shutdown = false;
   gpr_mu_unlock(&state->mu);
-  grpc_tcp_server_start(exec_ctx, state->tcp_server, pollsets, pollset_count,
-                        on_accept, state);
+  grpc_tcp_server_start(state->tcp_server, pollsets, pollset_count, on_accept,
+                        state);
 }
 
-static void tcp_server_shutdown_complete(grpc_exec_ctx* exec_ctx, void* arg,
-                                         grpc_error* error) {
+static void tcp_server_shutdown_complete(void* arg, grpc_error* error) {
   server_state* state = (server_state*)arg;
   /* ensure all threads have unlocked */
   gpr_mu_lock(&state->mu);
   grpc_closure* destroy_done = state->server_destroy_listener_done;
   GPR_ASSERT(state->shutdown);
   grpc_handshake_manager_pending_list_shutdown_all(
-      exec_ctx, state->pending_handshake_mgrs, GRPC_ERROR_REF(error));
+      state->pending_handshake_mgrs, GRPC_ERROR_REF(error));
   gpr_mu_unlock(&state->mu);
   // Flush queued work before destroying handshaker factory, since that
   // may do a synchronous unref.
-  grpc_exec_ctx_flush(exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   if (destroy_done != nullptr) {
-    destroy_done->cb(exec_ctx, destroy_done->cb_arg, GRPC_ERROR_REF(error));
-    grpc_exec_ctx_flush(exec_ctx);
+    destroy_done->cb(destroy_done->cb_arg, GRPC_ERROR_REF(error));
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_channel_args_destroy(exec_ctx, state->args);
+  grpc_channel_args_destroy(state->args);
   gpr_mu_destroy(&state->mu);
   gpr_free(state);
 }
 
 /* Server callback: destroy the tcp listener (so we don't generate further
    callbacks) */
-static void server_destroy_listener(grpc_exec_ctx* exec_ctx,
-                                    grpc_server* server, void* arg,
+static void server_destroy_listener(grpc_server* server, void* arg,
                                     grpc_closure* destroy_done) {
   server_state* state = (server_state*)arg;
   gpr_mu_lock(&state->mu);
@@ -248,12 +241,11 @@ static void server_destroy_listener(grpc_exec_ctx* exec_ctx,
   state->server_destroy_listener_done = destroy_done;
   grpc_tcp_server* tcp_server = state->tcp_server;
   gpr_mu_unlock(&state->mu);
-  grpc_tcp_server_shutdown_listeners(exec_ctx, tcp_server);
-  grpc_tcp_server_unref(exec_ctx, tcp_server);
+  grpc_tcp_server_shutdown_listeners(tcp_server);
+  grpc_tcp_server_unref(tcp_server);
 }
 
-grpc_error* grpc_chttp2_server_add_port(grpc_exec_ctx* exec_ctx,
-                                        grpc_server* server, const char* addr,
+grpc_error* grpc_chttp2_server_add_port(grpc_server* server, const char* addr,
                                         grpc_channel_args* args,
                                         int* port_num) {
   grpc_resolved_addresses* resolved = nullptr;
@@ -277,8 +269,8 @@ grpc_error* grpc_chttp2_server_add_port(grpc_exec_ctx* exec_ctx,
   GRPC_CLOSURE_INIT(&state->tcp_server_shutdown_complete,
                     tcp_server_shutdown_complete, state,
                     grpc_schedule_on_exec_ctx);
-  err = grpc_tcp_server_create(exec_ctx, &state->tcp_server_shutdown_complete,
-                               args, &tcp_server);
+  err = grpc_tcp_server_create(&state->tcp_server_shutdown_complete, args,
+                               &tcp_server);
   if (err != GRPC_ERROR_NONE) {
     goto error;
   }
@@ -327,7 +319,7 @@ grpc_error* grpc_chttp2_server_add_port(grpc_exec_ctx* exec_ctx,
   grpc_resolved_addresses_destroy(resolved);
 
   /* Register with the server only upon success */
-  grpc_server_add_listener(exec_ctx, server, state, server_start_listener,
+  grpc_server_add_listener(server, state, server_start_listener,
                            server_destroy_listener);
   goto done;
 
@@ -338,9 +330,9 @@ error:
     grpc_resolved_addresses_destroy(resolved);
   }
   if (tcp_server) {
-    grpc_tcp_server_unref(exec_ctx, tcp_server);
+    grpc_tcp_server_unref(tcp_server);
   } else {
-    grpc_channel_args_destroy(exec_ctx, args);
+    grpc_channel_args_destroy(args);
     gpr_free(state);
   }
   *port_num = 0;
diff --git a/src/core/ext/transport/chttp2/server/chttp2_server.h b/src/core/ext/transport/chttp2/server/chttp2_server.h
index 68304fd4f7..7de859da42 100644
--- a/src/core/ext/transport/chttp2/server/chttp2_server.h
+++ b/src/core/ext/transport/chttp2/server/chttp2_server.h
@@ -25,8 +25,7 @@
 
 /// Adds a port to \a server.  Sets \a port_num to the port number.
 /// Takes ownership of \a args.
-grpc_error* grpc_chttp2_server_add_port(grpc_exec_ctx* exec_ctx,
-                                        grpc_server* server, const char* addr,
+grpc_error* grpc_chttp2_server_add_port(grpc_server* server, const char* addr,
                                         grpc_channel_args* args, int* port_num);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_SERVER_CHTTP2_SERVER_H */
diff --git a/src/core/ext/transport/chttp2/server/insecure/server_chttp2.cc b/src/core/ext/transport/chttp2/server/insecure/server_chttp2.cc
index 8984896538..52c42d056c 100644
--- a/src/core/ext/transport/chttp2/server/insecure/server_chttp2.cc
+++ b/src/core/ext/transport/chttp2/server/insecure/server_chttp2.cc
@@ -26,12 +26,12 @@
 #include "src/core/lib/surface/server.h"
 
 int grpc_server_add_insecure_http2_port(grpc_server* server, const char* addr) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   int port_num = 0;
   GRPC_API_TRACE("grpc_server_add_insecure_http2_port(server=%p, addr=%s)", 2,
                  (server, addr));
   grpc_error* err = grpc_chttp2_server_add_port(
-      &exec_ctx, server, addr,
+      server, addr,
       grpc_channel_args_copy(grpc_server_get_channel_args(server)), &port_num);
   if (err != GRPC_ERROR_NONE) {
     const char* msg = grpc_error_string(err);
@@ -39,6 +39,6 @@ int grpc_server_add_insecure_http2_port(grpc_server* server, const char* addr) {
 
     GRPC_ERROR_UNREF(err);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return port_num;
 }
diff --git a/src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.cc b/src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.cc
index 3fe05ce4ef..dafd4af6ce 100644
--- a/src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.cc
+++ b/src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.cc
@@ -38,32 +38,29 @@ void grpc_server_add_insecure_channel_from_fd(grpc_server* server,
                                               void* reserved, int fd) {
   GPR_ASSERT(reserved == nullptr);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   char* name;
   gpr_asprintf(&name, "fd:%d", fd);
 
-  grpc_endpoint* server_endpoint =
-      grpc_tcp_create(&exec_ctx, grpc_fd_create(fd, name),
-                      grpc_server_get_channel_args(server), name);
+  grpc_endpoint* server_endpoint = grpc_tcp_create(
+      grpc_fd_create(fd, name), grpc_server_get_channel_args(server), name);
 
   gpr_free(name);
 
   const grpc_channel_args* server_args = grpc_server_get_channel_args(server);
   grpc_transport* transport = grpc_create_chttp2_transport(
-      &exec_ctx, server_args, server_endpoint, false /* is_client */);
+      server_args, server_endpoint, false /* is_client */);
 
   grpc_pollset** pollsets;
   size_t num_pollsets = 0;
   grpc_server_get_pollsets(server, &pollsets, &num_pollsets);
 
   for (size_t i = 0; i < num_pollsets; i++) {
-    grpc_endpoint_add_to_pollset(&exec_ctx, server_endpoint, pollsets[i]);
+    grpc_endpoint_add_to_pollset(server_endpoint, pollsets[i]);
   }
 
-  grpc_server_setup_transport(&exec_ctx, server, transport, nullptr,
-                              server_args);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_server_setup_transport(server, transport, nullptr, server_args);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 #else  // !GPR_SUPPORT_CHANNELS_FROM_FD
diff --git a/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.cc b/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.cc
index ac3ea40f47..723af97ff0 100644
--- a/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.cc
+++ b/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.cc
@@ -36,7 +36,7 @@
 
 int grpc_server_add_secure_http2_port(grpc_server* server, const char* addr,
                                       grpc_server_credentials* creds) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_error* err = GRPC_ERROR_NONE;
   grpc_server_security_connector* sc = nullptr;
   int port_num = 0;
@@ -52,8 +52,7 @@ int grpc_server_add_secure_http2_port(grpc_server* server, const char* addr,
         "No credentials specified for secure server port (creds==NULL)");
     goto done;
   }
-  status =
-      grpc_server_credentials_create_security_connector(&exec_ctx, creds, &sc);
+  status = grpc_server_credentials_create_security_connector(creds, &sc);
   if (status != GRPC_SECURITY_OK) {
     char* msg;
     gpr_asprintf(&msg,
@@ -72,12 +71,12 @@ int grpc_server_add_secure_http2_port(grpc_server* server, const char* addr,
       grpc_channel_args_copy_and_add(grpc_server_get_channel_args(server),
                                      args_to_add, GPR_ARRAY_SIZE(args_to_add));
   // Add server port.
-  err = grpc_chttp2_server_add_port(&exec_ctx, server, addr, args, &port_num);
+  err = grpc_chttp2_server_add_port(server, addr, args, &port_num);
 done:
   if (sc != nullptr) {
-    GRPC_SECURITY_CONNECTOR_UNREF(&exec_ctx, &sc->base, "server");
+    GRPC_SECURITY_CONNECTOR_UNREF(&sc->base, "server");
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   if (err != GRPC_ERROR_NONE) {
     const char* msg = grpc_error_string(err);
     gpr_log(GPR_ERROR, "%s", msg);
diff --git a/src/core/ext/transport/chttp2/transport/bin_decoder.cc b/src/core/ext/transport/chttp2/transport/bin_decoder.cc
index 3ccae7afc3..984cd4ca78 100644
--- a/src/core/ext/transport/chttp2/transport/bin_decoder.cc
+++ b/src/core/ext/transport/chttp2/transport/bin_decoder.cc
@@ -130,8 +130,7 @@ bool grpc_base64_decode_partial(struct grpc_base64_decode_context* ctx) {
   return true;
 }
 
-grpc_slice grpc_chttp2_base64_decode(grpc_exec_ctx* exec_ctx,
-                                     grpc_slice input) {
+grpc_slice grpc_chttp2_base64_decode(grpc_slice input) {
   size_t input_length = GRPC_SLICE_LENGTH(input);
   size_t output_length = input_length / 4 * 3;
   struct grpc_base64_decode_context ctx;
@@ -167,7 +166,7 @@ grpc_slice grpc_chttp2_base64_decode(grpc_exec_ctx* exec_ctx,
     char* s = grpc_slice_to_c_string(input);
     gpr_log(GPR_ERROR, "Base64 decoding failed, input string:\n%s\n", s);
     gpr_free(s);
-    grpc_slice_unref_internal(exec_ctx, output);
+    grpc_slice_unref_internal(output);
     return grpc_empty_slice();
   }
   GPR_ASSERT(ctx.output_cur == GRPC_SLICE_END_PTR(output));
@@ -175,8 +174,7 @@ grpc_slice grpc_chttp2_base64_decode(grpc_exec_ctx* exec_ctx,
   return output;
 }
 
-grpc_slice grpc_chttp2_base64_decode_with_length(grpc_exec_ctx* exec_ctx,
-                                                 grpc_slice input,
+grpc_slice grpc_chttp2_base64_decode_with_length(grpc_slice input,
                                                  size_t output_length) {
   size_t input_length = GRPC_SLICE_LENGTH(input);
   grpc_slice output = GRPC_SLICE_MALLOC(output_length);
@@ -189,7 +187,7 @@ grpc_slice grpc_chttp2_base64_decode_with_length(grpc_exec_ctx* exec_ctx,
             "grpc_chttp2_base64_decode_with_length has a length of %d, which "
             "has a tail of 1 byte.\n",
             (int)input_length);
-    grpc_slice_unref_internal(exec_ctx, output);
+    grpc_slice_unref_internal(output);
     return grpc_empty_slice();
   }
 
@@ -199,7 +197,7 @@ grpc_slice grpc_chttp2_base64_decode_with_length(grpc_exec_ctx* exec_ctx,
             "than the max possible output length %d.\n",
             (int)output_length,
             (int)(input_length / 4 * 3 + tail_xtra[input_length % 4]));
-    grpc_slice_unref_internal(exec_ctx, output);
+    grpc_slice_unref_internal(output);
     return grpc_empty_slice();
   }
 
@@ -213,7 +211,7 @@ grpc_slice grpc_chttp2_base64_decode_with_length(grpc_exec_ctx* exec_ctx,
     char* s = grpc_slice_to_c_string(input);
     gpr_log(GPR_ERROR, "Base64 decoding failed, input string:\n%s\n", s);
     gpr_free(s);
-    grpc_slice_unref_internal(exec_ctx, output);
+    grpc_slice_unref_internal(output);
     return grpc_empty_slice();
   }
   GPR_ASSERT(ctx.output_cur == GRPC_SLICE_END_PTR(output));
diff --git a/src/core/ext/transport/chttp2/transport/bin_decoder.h b/src/core/ext/transport/chttp2/transport/bin_decoder.h
index a78c305766..9cb75ccd81 100644
--- a/src/core/ext/transport/chttp2/transport/bin_decoder.h
+++ b/src/core/ext/transport/chttp2/transport/bin_decoder.h
@@ -40,13 +40,12 @@ bool grpc_base64_decode_partial(struct grpc_base64_decode_context* ctx);
 
 /* base64 decode a slice with pad chars. Returns a new slice, does not take
    ownership of the input. Returns an empty slice if decoding is failed. */
-grpc_slice grpc_chttp2_base64_decode(grpc_exec_ctx* exec_ctx, grpc_slice input);
+grpc_slice grpc_chttp2_base64_decode(grpc_slice input);
 
 /* base64 decode a slice without pad chars, data length is needed. Returns a new
    slice, does not take ownership of the input. Returns an empty slice if
    decoding is failed. */
-grpc_slice grpc_chttp2_base64_decode_with_length(grpc_exec_ctx* exec_ctx,
-                                                 grpc_slice input,
+grpc_slice grpc_chttp2_base64_decode_with_length(grpc_slice input,
                                                  size_t output_length);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H */
diff --git a/src/core/ext/transport/chttp2/transport/bin_encoder.h b/src/core/ext/transport/chttp2/transport/bin_encoder.h
index a8f36a345a..93ad0dfdea 100644
--- a/src/core/ext/transport/chttp2/transport/bin_encoder.h
+++ b/src/core/ext/transport/chttp2/transport/bin_encoder.h
@@ -32,7 +32,7 @@ grpc_slice grpc_chttp2_huffman_compress(grpc_slice input);
 /* equivalent to:
    grpc_slice x = grpc_chttp2_base64_encode(input);
    grpc_slice y = grpc_chttp2_huffman_compress(x);
-   grpc_slice_unref_internal(exec_ctx, x);
+   grpc_slice_unref_internal( x);
    return y; */
 grpc_slice grpc_chttp2_base64_encode_and_huffman_compress(grpc_slice input);
 
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.cc b/src/core/ext/transport/chttp2/transport/chttp2_transport.cc
index 63ac65ac78..4d81be10e9 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.cc
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.cc
@@ -95,105 +95,77 @@ grpc_core::DebugOnlyTraceFlag grpc_trace_chttp2_refcount(false,
                                                          "chttp2_refcount");
 
 /* forward declarations of various callbacks that we'll build closures around */
-static void write_action_begin_locked(grpc_exec_ctx* exec_ctx, void* t,
-                                      grpc_error* error);
-static void write_action(grpc_exec_ctx* exec_ctx, void* t, grpc_error* error);
-static void write_action_end_locked(grpc_exec_ctx* exec_ctx, void* t,
-                                    grpc_error* error);
+static void write_action_begin_locked(void* t, grpc_error* error);
+static void write_action(void* t, grpc_error* error);
+static void write_action_end_locked(void* t, grpc_error* error);
 
-static void read_action_locked(grpc_exec_ctx* exec_ctx, void* t,
-                               grpc_error* error);
+static void read_action_locked(void* t, grpc_error* error);
 
-static void complete_fetch_locked(grpc_exec_ctx* exec_ctx, void* gs,
-                                  grpc_error* error);
+static void complete_fetch_locked(void* gs, grpc_error* error);
 /** Set a transport level setting, and push it to our peer */
-static void queue_setting_update(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t,
+static void queue_setting_update(grpc_chttp2_transport* t,
                                  grpc_chttp2_setting_id id, uint32_t value);
 
-static void close_from_api(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                           grpc_chttp2_stream* s, grpc_error* error);
+static void close_from_api(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+                           grpc_error* error);
 
 /** Start new streams that have been created if we can */
-static void maybe_start_some_streams(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t);
+static void maybe_start_some_streams(grpc_chttp2_transport* t);
 
-static void connectivity_state_set(grpc_exec_ctx* exec_ctx,
-                                   grpc_chttp2_transport* t,
+static void connectivity_state_set(grpc_chttp2_transport* t,
                                    grpc_connectivity_state state,
                                    grpc_error* error, const char* reason);
 
-static void incoming_byte_stream_destroy_locked(grpc_exec_ctx* exec_ctx,
-                                                void* byte_stream,
+static void incoming_byte_stream_destroy_locked(void* byte_stream,
                                                 grpc_error* error_ignored);
 static void incoming_byte_stream_publish_error(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_error* error);
-static void incoming_byte_stream_unref(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_incoming_byte_stream* bs);
-
-static void benign_reclaimer_locked(grpc_exec_ctx* exec_ctx, void* t,
-                                    grpc_error* error);
-static void destructive_reclaimer_locked(grpc_exec_ctx* exec_ctx, void* t,
-                                         grpc_error* error);
-
-static void post_benign_reclaimer(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_transport* t);
-static void post_destructive_reclaimer(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_transport* t);
-
-static void close_transport_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_chttp2_transport* t, grpc_error* error);
-static void end_all_the_calls(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                              grpc_error* error);
-
-static void schedule_bdp_ping_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t);
-static void start_bdp_ping_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                  grpc_error* error);
-static void finish_bdp_ping_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                   grpc_error* error);
-static void next_bdp_ping_timer_expired_locked(grpc_exec_ctx* exec_ctx,
-                                               void* tp, grpc_error* error);
-
-static void cancel_pings(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                         grpc_error* error);
-static void send_ping_locked(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
+    grpc_chttp2_incoming_byte_stream* bs, grpc_error* error);
+static void incoming_byte_stream_unref(grpc_chttp2_incoming_byte_stream* bs);
+
+static void benign_reclaimer_locked(void* t, grpc_error* error);
+static void destructive_reclaimer_locked(void* t, grpc_error* error);
+
+static void post_benign_reclaimer(grpc_chttp2_transport* t);
+static void post_destructive_reclaimer(grpc_chttp2_transport* t);
+
+static void close_transport_locked(grpc_chttp2_transport* t, grpc_error* error);
+static void end_all_the_calls(grpc_chttp2_transport* t, grpc_error* error);
+
+static void schedule_bdp_ping_locked(grpc_chttp2_transport* t);
+static void start_bdp_ping_locked(void* tp, grpc_error* error);
+static void finish_bdp_ping_locked(void* tp, grpc_error* error);
+static void next_bdp_ping_timer_expired_locked(void* tp, grpc_error* error);
+
+static void cancel_pings(grpc_chttp2_transport* t, grpc_error* error);
+static void send_ping_locked(grpc_chttp2_transport* t,
                              grpc_closure* on_initiate,
                              grpc_closure* on_complete);
-static void retry_initiate_ping_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                       grpc_error* error);
+static void retry_initiate_ping_locked(void* tp, grpc_error* error);
 
 /** keepalive-relevant functions */
-static void init_keepalive_ping_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                       grpc_error* error);
-static void start_keepalive_ping_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error);
-static void finish_keepalive_ping_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                         grpc_error* error);
-static void keepalive_watchdog_fired_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                            grpc_error* error);
-
-static void reset_byte_stream(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* error);
+static void init_keepalive_ping_locked(void* arg, grpc_error* error);
+static void start_keepalive_ping_locked(void* arg, grpc_error* error);
+static void finish_keepalive_ping_locked(void* arg, grpc_error* error);
+static void keepalive_watchdog_fired_locked(void* arg, grpc_error* error);
+
+static void reset_byte_stream(void* arg, grpc_error* error);
 
 /*******************************************************************************
  * CONSTRUCTION/DESTRUCTION/REFCOUNTING
  */
 
-static void destruct_transport(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_transport* t) {
+static void destruct_transport(grpc_chttp2_transport* t) {
   size_t i;
 
-  grpc_endpoint_destroy(exec_ctx, t->ep);
+  grpc_endpoint_destroy(t->ep);
 
-  grpc_slice_buffer_destroy_internal(exec_ctx, &t->qbuf);
+  grpc_slice_buffer_destroy_internal(&t->qbuf);
 
-  grpc_slice_buffer_destroy_internal(exec_ctx, &t->outbuf);
-  grpc_chttp2_hpack_compressor_destroy(exec_ctx, &t->hpack_compressor);
+  grpc_slice_buffer_destroy_internal(&t->outbuf);
+  grpc_chttp2_hpack_compressor_destroy(&t->hpack_compressor);
 
-  grpc_slice_buffer_destroy_internal(exec_ctx, &t->read_buffer);
-  grpc_chttp2_hpack_parser_destroy(exec_ctx, &t->hpack_parser);
+  grpc_slice_buffer_destroy_internal(&t->read_buffer);
+  grpc_chttp2_hpack_parser_destroy(&t->hpack_parser);
   grpc_chttp2_goaway_parser_destroy(&t->goaway_parser);
 
   for (i = 0; i < STREAM_LIST_COUNT; i++) {
@@ -206,12 +178,11 @@ static void destruct_transport(grpc_exec_ctx* exec_ctx,
   GPR_ASSERT(grpc_chttp2_stream_map_size(&t->stream_map) == 0);
 
   grpc_chttp2_stream_map_destroy(&t->stream_map);
-  grpc_connectivity_state_destroy(exec_ctx, &t->channel_callback.state_tracker);
+  grpc_connectivity_state_destroy(&t->channel_callback.state_tracker);
 
-  GRPC_COMBINER_UNREF(exec_ctx, t->combiner, "chttp2_transport");
+  GRPC_COMBINER_UNREF(t->combiner, "chttp2_transport");
 
-  cancel_pings(exec_ctx, t,
-               GRPC_ERROR_CREATE_FROM_STATIC_STRING("Transport destroyed"));
+  cancel_pings(t, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Transport destroyed"));
 
   while (t->write_cb_pool) {
     grpc_chttp2_write_cb* next = t->write_cb_pool->next;
@@ -228,8 +199,7 @@ static void destruct_transport(grpc_exec_ctx* exec_ctx,
 }
 
 #ifndef NDEBUG
-void grpc_chttp2_unref_transport(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t, const char* reason,
+void grpc_chttp2_unref_transport(grpc_chttp2_transport* t, const char* reason,
                                  const char* file, int line) {
   if (grpc_trace_chttp2_refcount.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&t->refs.count);
@@ -237,7 +207,7 @@ void grpc_chttp2_unref_transport(grpc_exec_ctx* exec_ctx,
             t, val, val - 1, reason, file, line);
   }
   if (!gpr_unref(&t->refs)) return;
-  destruct_transport(exec_ctx, t);
+  destruct_transport(t);
 }
 
 void grpc_chttp2_ref_transport(grpc_chttp2_transport* t, const char* reason,
@@ -250,10 +220,9 @@ void grpc_chttp2_ref_transport(grpc_chttp2_transport* t, const char* reason,
   gpr_ref(&t->refs);
 }
 #else
-void grpc_chttp2_unref_transport(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t) {
+void grpc_chttp2_unref_transport(grpc_chttp2_transport* t) {
   if (!gpr_unref(&t->refs)) return;
-  destruct_transport(exec_ctx, t);
+  destruct_transport(t);
 }
 
 void grpc_chttp2_ref_transport(grpc_chttp2_transport* t) { gpr_ref(&t->refs); }
@@ -261,7 +230,7 @@ void grpc_chttp2_ref_transport(grpc_chttp2_transport* t) { gpr_ref(&t->refs); }
 
 static const grpc_transport_vtable* get_vtable(void);
 
-static void init_transport(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
+static void init_transport(grpc_chttp2_transport* t,
                            const grpc_channel_args* channel_args,
                            grpc_endpoint* ep, bool is_client) {
   size_t i;
@@ -320,7 +289,7 @@ static void init_transport(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
 
   t->goaway_error = GRPC_ERROR_NONE;
   grpc_chttp2_goaway_parser_init(&t->goaway_parser);
-  grpc_chttp2_hpack_parser_init(exec_ctx, &t->hpack_parser);
+  grpc_chttp2_hpack_parser_init(&t->hpack_parser);
 
   grpc_slice_buffer_init(&t->read_buffer);
 
@@ -351,14 +320,13 @@ static void init_transport(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
 
   /* configure http2 the way we like it */
   if (is_client) {
-    queue_setting_update(exec_ctx, t, GRPC_CHTTP2_SETTINGS_ENABLE_PUSH, 0);
-    queue_setting_update(exec_ctx, t,
-                         GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 0);
+    queue_setting_update(t, GRPC_CHTTP2_SETTINGS_ENABLE_PUSH, 0);
+    queue_setting_update(t, GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 0);
   }
-  queue_setting_update(exec_ctx, t, GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE,
+  queue_setting_update(t, GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE,
                        DEFAULT_MAX_HEADER_LIST_SIZE);
-  queue_setting_update(exec_ctx, t,
-                       GRPC_CHTTP2_SETTINGS_GRPC_ALLOW_TRUE_BINARY_METADATA, 1);
+  queue_setting_update(t, GRPC_CHTTP2_SETTINGS_GRPC_ALLOW_TRUE_BINARY_METADATA,
+                       1);
 
   t->ping_policy.max_pings_without_data = g_default_max_pings_without_data;
   t->ping_policy.min_sent_ping_interval_without_data =
@@ -533,7 +501,7 @@ static void init_transport(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
               int value = grpc_channel_arg_get_integer(
                   &channel_args->args[i], settings_map[j].integer_options);
               if (value >= 0) {
-                queue_setting_update(exec_ctx, t, settings_map[j].setting_id,
+                queue_setting_update(t, settings_map[j].setting_id,
                                      (uint32_t)value);
               }
             }
@@ -544,7 +512,7 @@ static void init_transport(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
     }
   }
 
-  t->flow_control.Init(exec_ctx, t, enable_bdp);
+  t->flow_control.Init(t, enable_bdp);
 
   /* No pings allowed before receiving a header or data frame. */
   t->ping_state.pings_before_data_required = 0;
@@ -558,8 +526,8 @@ static void init_transport(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
   if (t->keepalive_time != GRPC_MILLIS_INF_FUTURE) {
     t->keepalive_state = GRPC_CHTTP2_KEEPALIVE_STATE_WAITING;
     GRPC_CHTTP2_REF_TRANSPORT(t, "init keepalive ping");
-    grpc_timer_init(exec_ctx, &t->keepalive_ping_timer,
-                    grpc_exec_ctx_now(exec_ctx) + t->keepalive_time,
+    grpc_timer_init(&t->keepalive_ping_timer,
+                    grpc_core::ExecCtx::Get()->Now() + t->keepalive_time,
                     &t->init_keepalive_ping_locked);
   } else {
     /* Use GRPC_CHTTP2_KEEPALIVE_STATE_DISABLED to indicate there are no
@@ -569,42 +537,37 @@ static void init_transport(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
 
   if (enable_bdp) {
     GRPC_CHTTP2_REF_TRANSPORT(t, "bdp_ping");
-    schedule_bdp_ping_locked(exec_ctx, t);
+    schedule_bdp_ping_locked(t);
 
-    grpc_chttp2_act_on_flowctl_action(
-        exec_ctx, t->flow_control->PeriodicUpdate(exec_ctx), t, nullptr);
+    grpc_chttp2_act_on_flowctl_action(t->flow_control->PeriodicUpdate(), t,
+                                      nullptr);
   }
 
-  grpc_chttp2_initiate_write(exec_ctx, t,
-                             GRPC_CHTTP2_INITIATE_WRITE_INITIAL_WRITE);
-  post_benign_reclaimer(exec_ctx, t);
+  grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_INITIAL_WRITE);
+  post_benign_reclaimer(t);
 }
 
-static void destroy_transport_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                     grpc_error* error) {
+static void destroy_transport_locked(void* tp, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   t->destroying = 1;
   close_transport_locked(
-      exec_ctx, t,
-      grpc_error_set_int(
-          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Transport destroyed"),
-          GRPC_ERROR_INT_OCCURRED_DURING_WRITE, t->write_state));
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "destroy");
+      t, grpc_error_set_int(
+             GRPC_ERROR_CREATE_FROM_STATIC_STRING("Transport destroyed"),
+             GRPC_ERROR_INT_OCCURRED_DURING_WRITE, t->write_state));
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "destroy");
 }
 
-static void destroy_transport(grpc_exec_ctx* exec_ctx, grpc_transport* gt) {
+static void destroy_transport(grpc_transport* gt) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
-  GRPC_CLOSURE_SCHED(exec_ctx,
-                     GRPC_CLOSURE_CREATE(destroy_transport_locked, t,
+  GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(destroy_transport_locked, t,
                                          grpc_combiner_scheduler(t->combiner)),
                      GRPC_ERROR_NONE);
 }
 
-static void close_transport_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_chttp2_transport* t,
+static void close_transport_locked(grpc_chttp2_transport* t,
                                    grpc_error* error) {
-  end_all_the_calls(exec_ctx, t, GRPC_ERROR_REF(error));
-  cancel_pings(exec_ctx, t, GRPC_ERROR_REF(error));
+  end_all_the_calls(t, GRPC_ERROR_REF(error));
+  cancel_pings(t, GRPC_ERROR_REF(error));
   if (t->closed_with_error == GRPC_ERROR_NONE) {
     if (!grpc_error_has_clear_grpc_status(error)) {
       error = grpc_error_set_int(error, GRPC_ERROR_INT_GRPC_STATUS,
@@ -622,21 +585,21 @@ static void close_transport_locked(grpc_exec_ctx* exec_ctx,
     }
     GPR_ASSERT(error != GRPC_ERROR_NONE);
     t->closed_with_error = GRPC_ERROR_REF(error);
-    connectivity_state_set(exec_ctx, t, GRPC_CHANNEL_SHUTDOWN,
-                           GRPC_ERROR_REF(error), "close_transport");
+    connectivity_state_set(t, GRPC_CHANNEL_SHUTDOWN, GRPC_ERROR_REF(error),
+                           "close_transport");
     if (t->ping_state.is_delayed_ping_timer_set) {
-      grpc_timer_cancel(exec_ctx, &t->ping_state.delayed_ping_timer);
+      grpc_timer_cancel(&t->ping_state.delayed_ping_timer);
     }
     if (t->have_next_bdp_ping_timer) {
-      grpc_timer_cancel(exec_ctx, &t->next_bdp_ping_timer);
+      grpc_timer_cancel(&t->next_bdp_ping_timer);
     }
     switch (t->keepalive_state) {
       case GRPC_CHTTP2_KEEPALIVE_STATE_WAITING:
-        grpc_timer_cancel(exec_ctx, &t->keepalive_ping_timer);
+        grpc_timer_cancel(&t->keepalive_ping_timer);
         break;
       case GRPC_CHTTP2_KEEPALIVE_STATE_PINGING:
-        grpc_timer_cancel(exec_ctx, &t->keepalive_ping_timer);
-        grpc_timer_cancel(exec_ctx, &t->keepalive_watchdog_timer);
+        grpc_timer_cancel(&t->keepalive_ping_timer);
+        grpc_timer_cancel(&t->keepalive_watchdog_timer);
         break;
       case GRPC_CHTTP2_KEEPALIVE_STATE_DYING:
       case GRPC_CHTTP2_KEEPALIVE_STATE_DISABLED:
@@ -647,14 +610,13 @@ static void close_transport_locked(grpc_exec_ctx* exec_ctx,
     /* flush writable stream list to avoid dangling references */
     grpc_chttp2_stream* s;
     while (grpc_chttp2_list_pop_writable_stream(t, &s)) {
-      GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2_writing:close");
+      GRPC_CHTTP2_STREAM_UNREF(s, "chttp2_writing:close");
     }
     GPR_ASSERT(t->write_state == GRPC_CHTTP2_WRITE_STATE_IDLE);
-    grpc_endpoint_shutdown(exec_ctx, t->ep, GRPC_ERROR_REF(error));
+    grpc_endpoint_shutdown(t->ep, GRPC_ERROR_REF(error));
   }
   if (t->notify_on_receive_settings != nullptr) {
-    GRPC_CLOSURE_SCHED(exec_ctx, t->notify_on_receive_settings,
-                       GRPC_ERROR_CANCELLED);
+    GRPC_CLOSURE_SCHED(t->notify_on_receive_settings, GRPC_ERROR_CANCELLED);
     t->notify_on_receive_settings = nullptr;
   }
   GRPC_ERROR_UNREF(error);
@@ -664,22 +626,21 @@ static void close_transport_locked(grpc_exec_ctx* exec_ctx,
 void grpc_chttp2_stream_ref(grpc_chttp2_stream* s, const char* reason) {
   grpc_stream_ref(s->refcount, reason);
 }
-void grpc_chttp2_stream_unref(grpc_exec_ctx* exec_ctx, grpc_chttp2_stream* s,
-                              const char* reason) {
-  grpc_stream_unref(exec_ctx, s->refcount, reason);
+void grpc_chttp2_stream_unref(grpc_chttp2_stream* s, const char* reason) {
+  grpc_stream_unref(s->refcount, reason);
 }
 #else
 void grpc_chttp2_stream_ref(grpc_chttp2_stream* s) {
   grpc_stream_ref(s->refcount);
 }
-void grpc_chttp2_stream_unref(grpc_exec_ctx* exec_ctx, grpc_chttp2_stream* s) {
-  grpc_stream_unref(exec_ctx, s->refcount);
+void grpc_chttp2_stream_unref(grpc_chttp2_stream* s) {
+  grpc_stream_unref(s->refcount);
 }
 #endif
 
-static int init_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                       grpc_stream* gs, grpc_stream_refcount* refcount,
-                       const void* server_data, gpr_arena* arena) {
+static int init_stream(grpc_transport* gt, grpc_stream* gs,
+                       grpc_stream_refcount* refcount, const void* server_data,
+                       gpr_arena* arena) {
   GPR_TIMER_BEGIN("init_stream", 0);
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
   grpc_chttp2_stream* s = (grpc_chttp2_stream*)gs;
@@ -713,7 +674,7 @@ static int init_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
     s->id = (uint32_t)(uintptr_t)server_data;
     *t->accepting_stream = s;
     grpc_chttp2_stream_map_add(&t->stream_map, s->id, s);
-    post_destructive_reclaimer(exec_ctx, t);
+    post_destructive_reclaimer(t);
   }
 
   s->flow_control.Init(t->flow_control.get(), s);
@@ -722,8 +683,7 @@ static int init_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
   return 0;
 }
 
-static void destroy_stream_locked(grpc_exec_ctx* exec_ctx, void* sp,
-                                  grpc_error* error) {
+static void destroy_stream_locked(void* sp, grpc_error* error) {
   grpc_chttp2_stream* s = (grpc_chttp2_stream*)sp;
   grpc_chttp2_transport* t = s->t;
 
@@ -734,11 +694,10 @@ static void destroy_stream_locked(grpc_exec_ctx* exec_ctx, void* sp,
     GPR_ASSERT(grpc_chttp2_stream_map_find(&t->stream_map, s->id) == nullptr);
   }
 
-  grpc_slice_buffer_destroy_internal(exec_ctx,
-                                     &s->unprocessed_incoming_frames_buffer);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &s->frame_storage);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &s->compressed_data_buffer);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &s->decompressed_data_buffer);
+  grpc_slice_buffer_destroy_internal(&s->unprocessed_incoming_frames_buffer);
+  grpc_slice_buffer_destroy_internal(&s->frame_storage);
+  grpc_slice_buffer_destroy_internal(&s->compressed_data_buffer);
+  grpc_slice_buffer_destroy_internal(&s->decompressed_data_buffer);
 
   grpc_chttp2_list_remove_stalled_by_transport(t, s);
   grpc_chttp2_list_remove_stalled_by_stream(t, s);
@@ -757,27 +716,24 @@ static void destroy_stream_locked(grpc_exec_ctx* exec_ctx, void* sp,
   GPR_ASSERT(s->recv_initial_metadata_ready == nullptr);
   GPR_ASSERT(s->recv_message_ready == nullptr);
   GPR_ASSERT(s->recv_trailing_metadata_finished == nullptr);
-  grpc_chttp2_data_parser_destroy(exec_ctx, &s->data_parser);
-  grpc_chttp2_incoming_metadata_buffer_destroy(exec_ctx,
-                                               &s->metadata_buffer[0]);
-  grpc_chttp2_incoming_metadata_buffer_destroy(exec_ctx,
-                                               &s->metadata_buffer[1]);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &s->flow_controlled_buffer);
+  grpc_chttp2_data_parser_destroy(&s->data_parser);
+  grpc_chttp2_incoming_metadata_buffer_destroy(&s->metadata_buffer[0]);
+  grpc_chttp2_incoming_metadata_buffer_destroy(&s->metadata_buffer[1]);
+  grpc_slice_buffer_destroy_internal(&s->flow_controlled_buffer);
   GRPC_ERROR_UNREF(s->read_closed_error);
   GRPC_ERROR_UNREF(s->write_closed_error);
   GRPC_ERROR_UNREF(s->byte_stream_error);
 
   s->flow_control.Destroy();
 
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "stream");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "stream");
 
   GPR_TIMER_END("destroy_stream", 0);
 
-  GRPC_CLOSURE_SCHED(exec_ctx, s->destroy_stream_arg, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(s->destroy_stream_arg, GRPC_ERROR_NONE);
 }
 
-static void destroy_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                           grpc_stream* gs,
+static void destroy_stream(grpc_transport* gt, grpc_stream* gs,
                            grpc_closure* then_schedule_closure) {
   GPR_TIMER_BEGIN("destroy_stream", 0);
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
@@ -794,7 +750,6 @@ static void destroy_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
 
   s->destroy_stream_arg = then_schedule_closure;
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_INIT(&s->destroy_stream, destroy_stream_locked, s,
                         grpc_combiner_scheduler(t->combiner)),
       GRPC_ERROR_NONE);
@@ -806,8 +761,7 @@ grpc_chttp2_stream* grpc_chttp2_parsing_lookup_stream(grpc_chttp2_transport* t,
   return (grpc_chttp2_stream*)grpc_chttp2_stream_map_find(&t->stream_map, id);
 }
 
-grpc_chttp2_stream* grpc_chttp2_parsing_accept_stream(grpc_exec_ctx* exec_ctx,
-                                                      grpc_chttp2_transport* t,
+grpc_chttp2_stream* grpc_chttp2_parsing_accept_stream(grpc_chttp2_transport* t,
                                                       uint32_t id) {
   if (t->channel_callback.accept_stream == nullptr) {
     return nullptr;
@@ -815,8 +769,7 @@ grpc_chttp2_stream* grpc_chttp2_parsing_accept_stream(grpc_exec_ctx* exec_ctx,
   grpc_chttp2_stream* accepting;
   GPR_ASSERT(t->accepting_stream == nullptr);
   t->accepting_stream = &accepting;
-  t->channel_callback.accept_stream(exec_ctx,
-                                    t->channel_callback.accept_stream_user_data,
+  t->channel_callback.accept_stream(t->channel_callback.accept_stream_user_data,
                                     &t->base, (void*)(uintptr_t)id);
   t->accepting_stream = nullptr;
   return accepting;
@@ -838,7 +791,7 @@ static const char* write_state_name(grpc_chttp2_write_state st) {
   GPR_UNREACHABLE_CODE(return "UNKNOWN");
 }
 
-static void set_write_state(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
+static void set_write_state(grpc_chttp2_transport* t,
                             grpc_chttp2_write_state st, const char* reason) {
   GRPC_CHTTP2_IF_TRACING(gpr_log(GPR_DEBUG, "W:%p %s state %s -> %s [%s]", t,
                                  t->is_client ? "CLIENT" : "SERVER",
@@ -846,108 +799,100 @@ static void set_write_state(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
                                  write_state_name(st), reason));
   t->write_state = st;
   if (st == GRPC_CHTTP2_WRITE_STATE_IDLE) {
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx, &t->run_after_write);
+    GRPC_CLOSURE_LIST_SCHED(&t->run_after_write);
     if (t->close_transport_on_writes_finished != nullptr) {
       grpc_error* err = t->close_transport_on_writes_finished;
       t->close_transport_on_writes_finished = nullptr;
-      close_transport_locked(exec_ctx, t, err);
+      close_transport_locked(t, err);
     }
   }
 }
 
 static void inc_initiate_write_reason(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_initiate_write_reason reason) {
+    grpc_chttp2_initiate_write_reason reason) {
   switch (reason) {
     case GRPC_CHTTP2_INITIATE_WRITE_INITIAL_WRITE:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_INITIAL_WRITE(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_INITIAL_WRITE();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_START_NEW_STREAM:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_START_NEW_STREAM(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_START_NEW_STREAM();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_SEND_MESSAGE:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_SEND_INITIAL_METADATA:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA(
-          exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_SEND_TRAILING_METADATA:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_TRAILING_METADATA(
-          exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_TRAILING_METADATA();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_RETRY_SEND_PING:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RETRY_SEND_PING(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RETRY_SEND_PING();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_CONTINUE_PINGS:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CONTINUE_PINGS(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CONTINUE_PINGS();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_GOAWAY_SENT:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_RST_STREAM:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_CLOSE_FROM_API:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CLOSE_FROM_API(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CLOSE_FROM_API();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_STREAM_FLOW_CONTROL:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_STREAM_FLOW_CONTROL(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_STREAM_FLOW_CONTROL();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL(
-          exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_SETTINGS(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_SETTINGS();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_SETTING:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_SETTING(
-          exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_SETTING();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_UPDATE:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_UPDATE(
-          exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_UPDATE();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_APPLICATION_PING:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_APPLICATION_PING(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_APPLICATION_PING();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_KEEPALIVE_PING:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_KEEPALIVE_PING(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_KEEPALIVE_PING();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL_UNSTALLED:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED(
-          exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_PING_RESPONSE:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_FORCE_RST_STREAM:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM();
       break;
   }
 }
 
-void grpc_chttp2_initiate_write(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_transport* t,
+void grpc_chttp2_initiate_write(grpc_chttp2_transport* t,
                                 grpc_chttp2_initiate_write_reason reason) {
   GPR_TIMER_BEGIN("grpc_chttp2_initiate_write", 0);
 
   switch (t->write_state) {
     case GRPC_CHTTP2_WRITE_STATE_IDLE:
-      inc_initiate_write_reason(exec_ctx, reason);
-      set_write_state(exec_ctx, t, GRPC_CHTTP2_WRITE_STATE_WRITING,
+      inc_initiate_write_reason(reason);
+      set_write_state(t, GRPC_CHTTP2_WRITE_STATE_WRITING,
                       grpc_chttp2_initiate_write_reason_string(reason));
       t->is_first_write_in_batch = true;
       GRPC_CHTTP2_REF_TRANSPORT(t, "writing");
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           GRPC_CLOSURE_INIT(&t->write_action_begin_locked,
                             write_action_begin_locked, t,
                             grpc_combiner_finally_scheduler(t->combiner)),
           GRPC_ERROR_NONE);
       break;
     case GRPC_CHTTP2_WRITE_STATE_WRITING:
-      set_write_state(exec_ctx, t, GRPC_CHTTP2_WRITE_STATE_WRITING_WITH_MORE,
+      set_write_state(t, GRPC_CHTTP2_WRITE_STATE_WRITING_WITH_MORE,
                       grpc_chttp2_initiate_write_reason_string(reason));
       break;
     case GRPC_CHTTP2_WRITE_STATE_WRITING_WITH_MORE:
@@ -956,8 +901,7 @@ void grpc_chttp2_initiate_write(grpc_exec_ctx* exec_ctx,
   GPR_TIMER_END("grpc_chttp2_initiate_write", 0);
 }
 
-void grpc_chttp2_mark_stream_writable(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_transport* t,
+void grpc_chttp2_mark_stream_writable(grpc_chttp2_transport* t,
                                       grpc_chttp2_stream* s) {
   if (t->closed_with_error == GRPC_ERROR_NONE &&
       grpc_chttp2_list_add_writable_stream(t, s)) {
@@ -1007,8 +951,7 @@ static const char* begin_writing_desc(bool partial, bool inlined) {
   GPR_UNREACHABLE_CODE(return "bad state tuple");
 }
 
-static void write_action_begin_locked(grpc_exec_ctx* exec_ctx, void* gt,
-                                      grpc_error* error_ignored) {
+static void write_action_begin_locked(void* gt, grpc_error* error_ignored) {
   GPR_TIMER_BEGIN("write_action_begin_locked", 0);
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
   GPR_ASSERT(t->write_state != GRPC_CHTTP2_WRITE_STATE_IDLE);
@@ -1016,62 +959,59 @@ static void write_action_begin_locked(grpc_exec_ctx* exec_ctx, void* gt,
   if (t->closed_with_error != GRPC_ERROR_NONE) {
     r.writing = false;
   } else {
-    r = grpc_chttp2_begin_write(exec_ctx, t);
+    r = grpc_chttp2_begin_write(t);
   }
   if (r.writing) {
     if (r.partial) {
-      GRPC_STATS_INC_HTTP2_PARTIAL_WRITES(exec_ctx);
+      GRPC_STATS_INC_HTTP2_PARTIAL_WRITES();
     }
     if (!t->is_first_write_in_batch) {
-      GRPC_STATS_INC_HTTP2_WRITES_CONTINUED(exec_ctx);
+      GRPC_STATS_INC_HTTP2_WRITES_CONTINUED();
     }
     grpc_closure_scheduler* scheduler =
         write_scheduler(t, r.early_results_scheduled, r.partial);
     if (scheduler != grpc_schedule_on_exec_ctx) {
-      GRPC_STATS_INC_HTTP2_WRITES_OFFLOADED(exec_ctx);
+      GRPC_STATS_INC_HTTP2_WRITES_OFFLOADED();
     }
     set_write_state(
-        exec_ctx, t,
+        t,
         r.partial ? GRPC_CHTTP2_WRITE_STATE_WRITING_WITH_MORE
                   : GRPC_CHTTP2_WRITE_STATE_WRITING,
         begin_writing_desc(r.partial, scheduler == grpc_schedule_on_exec_ctx));
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_INIT(&t->write_action, write_action, t, scheduler),
         GRPC_ERROR_NONE);
   } else {
-    GRPC_STATS_INC_HTTP2_SPURIOUS_WRITES_BEGUN(exec_ctx);
-    set_write_state(exec_ctx, t, GRPC_CHTTP2_WRITE_STATE_IDLE,
-                    "begin writing nothing");
-    GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "writing");
+    GRPC_STATS_INC_HTTP2_SPURIOUS_WRITES_BEGUN();
+    set_write_state(t, GRPC_CHTTP2_WRITE_STATE_IDLE, "begin writing nothing");
+    GRPC_CHTTP2_UNREF_TRANSPORT(t, "writing");
   }
   GPR_TIMER_END("write_action_begin_locked", 0);
 }
 
-static void write_action(grpc_exec_ctx* exec_ctx, void* gt, grpc_error* error) {
+static void write_action(void* gt, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
   GPR_TIMER_BEGIN("write_action", 0);
   grpc_endpoint_write(
-      exec_ctx, t->ep, &t->outbuf,
+      t->ep, &t->outbuf,
       GRPC_CLOSURE_INIT(&t->write_action_end_locked, write_action_end_locked, t,
                         grpc_combiner_scheduler(t->combiner)));
   GPR_TIMER_END("write_action", 0);
 }
 
-static void write_action_end_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                    grpc_error* error) {
+static void write_action_end_locked(void* tp, grpc_error* error) {
   GPR_TIMER_BEGIN("terminate_writing_with_lock", 0);
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
 
   if (error != GRPC_ERROR_NONE) {
-    close_transport_locked(exec_ctx, t, GRPC_ERROR_REF(error));
+    close_transport_locked(t, GRPC_ERROR_REF(error));
   }
 
   if (t->sent_goaway_state == GRPC_CHTTP2_GOAWAY_SEND_SCHEDULED) {
     t->sent_goaway_state = GRPC_CHTTP2_GOAWAY_SENT;
     if (grpc_chttp2_stream_map_size(&t->stream_map) == 0) {
       close_transport_locked(
-          exec_ctx, t, GRPC_ERROR_CREATE_FROM_STATIC_STRING("goaway sent"));
+          t, GRPC_ERROR_CREATE_FROM_STATIC_STRING("goaway sent"));
     }
   }
 
@@ -1080,17 +1020,14 @@ static void write_action_end_locked(grpc_exec_ctx* exec_ctx, void* tp,
       GPR_UNREACHABLE_CODE(break);
     case GRPC_CHTTP2_WRITE_STATE_WRITING:
       GPR_TIMER_MARK("state=writing", 0);
-      set_write_state(exec_ctx, t, GRPC_CHTTP2_WRITE_STATE_IDLE,
-                      "finish writing");
+      set_write_state(t, GRPC_CHTTP2_WRITE_STATE_IDLE, "finish writing");
       break;
     case GRPC_CHTTP2_WRITE_STATE_WRITING_WITH_MORE:
       GPR_TIMER_MARK("state=writing_stale_no_poller", 0);
-      set_write_state(exec_ctx, t, GRPC_CHTTP2_WRITE_STATE_WRITING,
-                      "continue writing");
+      set_write_state(t, GRPC_CHTTP2_WRITE_STATE_WRITING, "continue writing");
       t->is_first_write_in_batch = false;
       GRPC_CHTTP2_REF_TRANSPORT(t, "writing");
       GRPC_CLOSURE_RUN(
-          exec_ctx,
           GRPC_CLOSURE_INIT(&t->write_action_begin_locked,
                             write_action_begin_locked, t,
                             grpc_combiner_finally_scheduler(t->combiner)),
@@ -1098,16 +1035,15 @@ static void write_action_end_locked(grpc_exec_ctx* exec_ctx, void* tp,
       break;
   }
 
-  grpc_chttp2_end_write(exec_ctx, t, GRPC_ERROR_REF(error));
+  grpc_chttp2_end_write(t, GRPC_ERROR_REF(error));
 
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "writing");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "writing");
   GPR_TIMER_END("terminate_writing_with_lock", 0);
 }
 
 // Dirties an HTTP2 setting to be sent out next time a writing path occurs.
 // If the change needs to occur immediately, manually initiate a write.
-static void queue_setting_update(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t,
+static void queue_setting_update(grpc_chttp2_transport* t,
                                  grpc_chttp2_setting_id id, uint32_t value) {
   const grpc_chttp2_setting_parameters* sp =
       &grpc_chttp2_settings_parameters[id];
@@ -1122,8 +1058,7 @@ static void queue_setting_update(grpc_exec_ctx* exec_ctx,
   }
 }
 
-void grpc_chttp2_add_incoming_goaway(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+void grpc_chttp2_add_incoming_goaway(grpc_chttp2_transport* t,
                                      uint32_t goaway_error,
                                      grpc_slice goaway_text) {
   // GRPC_CHTTP2_IF_TRACING(
@@ -1158,12 +1093,11 @@ void grpc_chttp2_add_incoming_goaway(grpc_exec_ctx* exec_ctx,
 
   /* lie: use transient failure from the transport to indicate goaway has been
    * received */
-  connectivity_state_set(exec_ctx, t, GRPC_CHANNEL_TRANSIENT_FAILURE,
+  connectivity_state_set(t, GRPC_CHANNEL_TRANSIENT_FAILURE,
                          GRPC_ERROR_REF(t->goaway_error), "got_goaway");
 }
 
-static void maybe_start_some_streams(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t) {
+static void maybe_start_some_streams(grpc_chttp2_transport* t) {
   grpc_chttp2_stream* s;
   /* start streams where we have free grpc_chttp2_stream ids and free
    * concurrency */
@@ -1183,22 +1117,21 @@ static void maybe_start_some_streams(grpc_exec_ctx* exec_ctx,
 
     if (t->next_stream_id >= MAX_CLIENT_STREAM_ID) {
       connectivity_state_set(
-          exec_ctx, t, GRPC_CHANNEL_TRANSIENT_FAILURE,
+          t, GRPC_CHANNEL_TRANSIENT_FAILURE,
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Stream IDs exhausted"),
           "no_more_stream_ids");
     }
 
     grpc_chttp2_stream_map_add(&t->stream_map, s->id, s);
-    post_destructive_reclaimer(exec_ctx, t);
-    grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
-    grpc_chttp2_initiate_write(exec_ctx, t,
-                               GRPC_CHTTP2_INITIATE_WRITE_START_NEW_STREAM);
+    post_destructive_reclaimer(t);
+    grpc_chttp2_mark_stream_writable(t, s);
+    grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_START_NEW_STREAM);
   }
   /* cancel out streams that will never be started */
   while (t->next_stream_id >= MAX_CLIENT_STREAM_ID &&
          grpc_chttp2_list_pop_waiting_for_concurrency(t, &s)) {
     grpc_chttp2_cancel_stream(
-        exec_ctx, t, s,
+        t, s,
         grpc_error_set_int(
             GRPC_ERROR_CREATE_FROM_STATIC_STRING("Stream IDs exhausted"),
             GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE));
@@ -1220,15 +1153,13 @@ static grpc_closure* add_closure_barrier(grpc_closure* closure) {
   return closure;
 }
 
-static void null_then_run_closure(grpc_exec_ctx* exec_ctx,
-                                  grpc_closure** closure, grpc_error* error) {
+static void null_then_run_closure(grpc_closure** closure, grpc_error* error) {
   grpc_closure* c = *closure;
   *closure = nullptr;
-  GRPC_CLOSURE_RUN(exec_ctx, c, error);
+  GRPC_CLOSURE_RUN(c, error);
 }
 
-void grpc_chttp2_complete_closure_step(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_transport* t,
+void grpc_chttp2_complete_closure_step(grpc_chttp2_transport* t,
                                        grpc_chttp2_stream* s,
                                        grpc_closure** pclosure,
                                        grpc_error* error, const char* desc) {
@@ -1268,7 +1199,7 @@ void grpc_chttp2_complete_closure_step(grpc_exec_ctx* exec_ctx,
     }
     if ((t->write_state == GRPC_CHTTP2_WRITE_STATE_IDLE) ||
         !(closure->next_data.scratch & CLOSURE_BARRIER_MAY_COVER_WRITE)) {
-      GRPC_CLOSURE_RUN(exec_ctx, closure, closure->error_data.error);
+      GRPC_CLOSURE_RUN(closure, closure->error_data.error);
     } else {
       grpc_closure_list_append(&t->run_after_write, closure,
                                closure->error_data.error);
@@ -1284,28 +1215,24 @@ static bool contains_non_ok_status(grpc_metadata_batch* batch) {
   return false;
 }
 
-static void maybe_become_writable_due_to_send_msg(grpc_exec_ctx* exec_ctx,
-                                                  grpc_chttp2_transport* t,
+static void maybe_become_writable_due_to_send_msg(grpc_chttp2_transport* t,
                                                   grpc_chttp2_stream* s) {
   if (s->id != 0 && (!s->write_buffering ||
                      s->flow_controlled_buffer.length > t->write_buffer_size)) {
-    grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
-    grpc_chttp2_initiate_write(exec_ctx, t,
-                               GRPC_CHTTP2_INITIATE_WRITE_SEND_MESSAGE);
+    grpc_chttp2_mark_stream_writable(t, s);
+    grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_SEND_MESSAGE);
   }
 }
 
-static void add_fetched_slice_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+static void add_fetched_slice_locked(grpc_chttp2_transport* t,
                                      grpc_chttp2_stream* s) {
   s->fetched_send_message_length +=
       (uint32_t)GRPC_SLICE_LENGTH(s->fetching_slice);
   grpc_slice_buffer_add(&s->flow_controlled_buffer, s->fetching_slice);
-  maybe_become_writable_due_to_send_msg(exec_ctx, t, s);
+  maybe_become_writable_due_to_send_msg(t, s);
 }
 
-static void continue_fetching_send_locked(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t,
+static void continue_fetching_send_locked(grpc_chttp2_transport* t,
                                           grpc_chttp2_stream* s) {
   for (;;) {
     if (s->fetching_send_message == nullptr) {
@@ -1314,11 +1241,11 @@ static void continue_fetching_send_locked(grpc_exec_ctx* exec_ctx,
       return;  /* early out */
     }
     if (s->fetched_send_message_length == s->fetching_send_message->length) {
-      grpc_byte_stream_destroy(exec_ctx, s->fetching_send_message);
+      grpc_byte_stream_destroy(s->fetching_send_message);
       int64_t notify_offset = s->next_message_end_offset;
       if (notify_offset <= s->flow_controlled_bytes_written) {
         grpc_chttp2_complete_closure_step(
-            exec_ctx, t, s, &s->fetching_send_message_finished, GRPC_ERROR_NONE,
+            t, s, &s->fetching_send_message_finished, GRPC_ERROR_NONE,
             "fetching_send_message_finished");
       } else {
         grpc_chttp2_write_cb* cb = t->write_cb_pool;
@@ -1339,39 +1266,37 @@ static void continue_fetching_send_locked(grpc_exec_ctx* exec_ctx,
       }
       s->fetching_send_message = nullptr;
       return; /* early out */
-    } else if (grpc_byte_stream_next(exec_ctx, s->fetching_send_message,
-                                     UINT32_MAX, &s->complete_fetch_locked)) {
-      grpc_error* error = grpc_byte_stream_pull(
-          exec_ctx, s->fetching_send_message, &s->fetching_slice);
+    } else if (grpc_byte_stream_next(s->fetching_send_message, UINT32_MAX,
+                                     &s->complete_fetch_locked)) {
+      grpc_error* error =
+          grpc_byte_stream_pull(s->fetching_send_message, &s->fetching_slice);
       if (error != GRPC_ERROR_NONE) {
-        grpc_byte_stream_destroy(exec_ctx, s->fetching_send_message);
-        grpc_chttp2_cancel_stream(exec_ctx, t, s, error);
+        grpc_byte_stream_destroy(s->fetching_send_message);
+        grpc_chttp2_cancel_stream(t, s, error);
       } else {
-        add_fetched_slice_locked(exec_ctx, t, s);
+        add_fetched_slice_locked(t, s);
       }
     }
   }
 }
 
-static void complete_fetch_locked(grpc_exec_ctx* exec_ctx, void* gs,
-                                  grpc_error* error) {
+static void complete_fetch_locked(void* gs, grpc_error* error) {
   grpc_chttp2_stream* s = (grpc_chttp2_stream*)gs;
   grpc_chttp2_transport* t = s->t;
   if (error == GRPC_ERROR_NONE) {
-    error = grpc_byte_stream_pull(exec_ctx, s->fetching_send_message,
-                                  &s->fetching_slice);
+    error = grpc_byte_stream_pull(s->fetching_send_message, &s->fetching_slice);
     if (error == GRPC_ERROR_NONE) {
-      add_fetched_slice_locked(exec_ctx, t, s);
-      continue_fetching_send_locked(exec_ctx, t, s);
+      add_fetched_slice_locked(t, s);
+      continue_fetching_send_locked(t, s);
     }
   }
   if (error != GRPC_ERROR_NONE) {
-    grpc_byte_stream_destroy(exec_ctx, s->fetching_send_message);
-    grpc_chttp2_cancel_stream(exec_ctx, t, s, error);
+    grpc_byte_stream_destroy(s->fetching_send_message);
+    grpc_chttp2_cancel_stream(t, s, error);
   }
 }
 
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void do_nothing(void* arg, grpc_error* error) {}
 
 static void log_metadata(const grpc_metadata_batch* md_batch, uint32_t id,
                          bool is_client, bool is_initial) {
@@ -1386,7 +1311,7 @@ static void log_metadata(const grpc_metadata_batch* md_batch, uint32_t id,
   }
 }
 
-static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
+static void perform_stream_op_locked(void* stream_op,
                                      grpc_error* error_ignored) {
   GPR_TIMER_BEGIN("perform_stream_op_locked", 0);
 
@@ -1396,7 +1321,7 @@ static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
   grpc_transport_stream_op_batch_payload* op_payload = op->payload;
   grpc_chttp2_transport* t = s->t;
 
-  GRPC_STATS_INC_HTTP2_OP_BATCHES(exec_ctx);
+  GRPC_STATS_INC_HTTP2_OP_BATCHES();
 
   if (grpc_http_trace.enabled()) {
     char* str = grpc_transport_stream_op_batch_string(op);
@@ -1431,13 +1356,12 @@ static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
   }
 
   if (op->cancel_stream) {
-    GRPC_STATS_INC_HTTP2_OP_CANCEL(exec_ctx);
-    grpc_chttp2_cancel_stream(exec_ctx, t, s,
-                              op_payload->cancel_stream.cancel_error);
+    GRPC_STATS_INC_HTTP2_OP_CANCEL();
+    grpc_chttp2_cancel_stream(t, s, op_payload->cancel_stream.cancel_error);
   }
 
   if (op->send_initial_metadata) {
-    GRPC_STATS_INC_HTTP2_OP_SEND_INITIAL_METADATA(exec_ctx);
+    GRPC_STATS_INC_HTTP2_OP_SEND_INITIAL_METADATA();
     GPR_ASSERT(s->send_initial_metadata_finished == nullptr);
     on_complete->next_data.scratch |= CLOSURE_BARRIER_MAY_COVER_WRITE;
 
@@ -1465,7 +1389,7 @@ static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
     }
     if (metadata_size > metadata_peer_limit) {
       grpc_chttp2_cancel_stream(
-          exec_ctx, t, s,
+          t, s,
           grpc_error_set_int(
               grpc_error_set_int(
                   grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
@@ -1484,10 +1408,10 @@ static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
           if (t->closed_with_error == GRPC_ERROR_NONE) {
             GPR_ASSERT(s->id == 0);
             grpc_chttp2_list_add_waiting_for_concurrency(t, s);
-            maybe_start_some_streams(exec_ctx, t);
+            maybe_start_some_streams(t);
           } else {
             grpc_chttp2_cancel_stream(
-                exec_ctx, t, s,
+                t, s,
                 grpc_error_set_int(
                     GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                         "Transport closed", &t->closed_with_error, 1),
@@ -1495,18 +1419,18 @@ static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
           }
         } else {
           GPR_ASSERT(s->id != 0);
-          grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+          grpc_chttp2_mark_stream_writable(t, s);
           if (!(op->send_message &&
                 (op->payload->send_message.send_message->flags &
                  GRPC_WRITE_BUFFER_HINT))) {
             grpc_chttp2_initiate_write(
-                exec_ctx, t, GRPC_CHTTP2_INITIATE_WRITE_SEND_INITIAL_METADATA);
+                t, GRPC_CHTTP2_INITIATE_WRITE_SEND_INITIAL_METADATA);
           }
         }
       } else {
         s->send_initial_metadata = nullptr;
         grpc_chttp2_complete_closure_step(
-            exec_ctx, t, s, &s->send_initial_metadata_finished,
+            t, s, &s->send_initial_metadata_finished,
             GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                 "Attempt to send initial metadata after stream was closed",
                 &s->write_closed_error, 1),
@@ -1520,9 +1444,9 @@ static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
   }
 
   if (op->send_message) {
-    GRPC_STATS_INC_HTTP2_OP_SEND_MESSAGE(exec_ctx);
+    GRPC_STATS_INC_HTTP2_OP_SEND_MESSAGE();
     GRPC_STATS_INC_HTTP2_SEND_MESSAGE_SIZE(
-        exec_ctx, op->payload->send_message.send_message->length);
+        op->payload->send_message.send_message->length);
     on_complete->next_data.scratch |= CLOSURE_BARRIER_MAY_COVER_WRITE;
     s->fetching_send_message_finished = add_closure_barrier(op->on_complete);
     if (s->write_closed) {
@@ -1532,7 +1456,7 @@ static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
       // recv_message failure, breaking out of its loop, and then
       // starting recv_trailing_metadata.
       grpc_chttp2_complete_closure_step(
-          exec_ctx, t, s, &s->fetching_send_message_finished,
+          t, s, &s->fetching_send_message_finished,
           t->is_client && s->received_trailing_metadata
               ? GRPC_ERROR_NONE
               : GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
@@ -1561,13 +1485,13 @@ static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
       } else {
         s->write_buffering = false;
       }
-      continue_fetching_send_locked(exec_ctx, t, s);
-      maybe_become_writable_due_to_send_msg(exec_ctx, t, s);
+      continue_fetching_send_locked(t, s);
+      maybe_become_writable_due_to_send_msg(t, s);
     }
   }
 
   if (op->send_trailing_metadata) {
-    GRPC_STATS_INC_HTTP2_OP_SEND_TRAILING_METADATA(exec_ctx);
+    GRPC_STATS_INC_HTTP2_OP_SEND_TRAILING_METADATA();
     GPR_ASSERT(s->send_trailing_metadata_finished == nullptr);
     on_complete->next_data.scratch |= CLOSURE_BARRIER_MAY_COVER_WRITE;
     s->send_trailing_metadata_finished = add_closure_barrier(on_complete);
@@ -1581,7 +1505,7 @@ static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
                    [GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE];
     if (metadata_size > metadata_peer_limit) {
       grpc_chttp2_cancel_stream(
-          exec_ctx, t, s,
+          t, s,
           grpc_error_set_int(
               grpc_error_set_int(
                   grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
@@ -1598,7 +1522,7 @@ static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
       if (s->write_closed) {
         s->send_trailing_metadata = nullptr;
         grpc_chttp2_complete_closure_step(
-            exec_ctx, t, s, &s->send_trailing_metadata_finished,
+            t, s, &s->send_trailing_metadata_finished,
             grpc_metadata_batch_is_empty(
                 op->payload->send_trailing_metadata.send_trailing_metadata)
                 ? GRPC_ERROR_NONE
@@ -1609,15 +1533,15 @@ static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
       } else if (s->id != 0) {
         /* TODO(ctiller): check if there's flow control for any outstanding
            bytes before going writable */
-        grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+        grpc_chttp2_mark_stream_writable(t, s);
         grpc_chttp2_initiate_write(
-            exec_ctx, t, GRPC_CHTTP2_INITIATE_WRITE_SEND_TRAILING_METADATA);
+            t, GRPC_CHTTP2_INITIATE_WRITE_SEND_TRAILING_METADATA);
       }
     }
   }
 
   if (op->recv_initial_metadata) {
-    GRPC_STATS_INC_HTTP2_OP_RECV_INITIAL_METADATA(exec_ctx);
+    GRPC_STATS_INC_HTTP2_OP_RECV_INITIAL_METADATA();
     GPR_ASSERT(s->recv_initial_metadata_ready == nullptr);
     s->recv_initial_metadata_ready =
         op_payload->recv_initial_metadata.recv_initial_metadata_ready;
@@ -1629,11 +1553,11 @@ static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
       gpr_atm_rel_store(op_payload->recv_initial_metadata.peer_string,
                         (gpr_atm)gpr_strdup(t->peer_string));
     }
-    grpc_chttp2_maybe_complete_recv_initial_metadata(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_initial_metadata(t, s);
   }
 
   if (op->recv_message) {
-    GRPC_STATS_INC_HTTP2_OP_RECV_MESSAGE(exec_ctx);
+    GRPC_STATS_INC_HTTP2_OP_RECV_MESSAGE();
     size_t already_received;
     GPR_ASSERT(s->recv_message_ready == nullptr);
     GPR_ASSERT(!s->pending_byte_stream);
@@ -1644,32 +1568,30 @@ static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
         already_received = s->frame_storage.length;
         s->flow_control->IncomingByteStreamUpdate(GRPC_HEADER_SIZE_IN_BYTES,
                                                   already_received);
-        grpc_chttp2_act_on_flowctl_action(exec_ctx,
-                                          s->flow_control->MakeAction(), t, s);
+        grpc_chttp2_act_on_flowctl_action(s->flow_control->MakeAction(), t, s);
       }
     }
-    grpc_chttp2_maybe_complete_recv_message(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_message(t, s);
   }
 
   if (op->recv_trailing_metadata) {
-    GRPC_STATS_INC_HTTP2_OP_RECV_TRAILING_METADATA(exec_ctx);
+    GRPC_STATS_INC_HTTP2_OP_RECV_TRAILING_METADATA();
     GPR_ASSERT(s->recv_trailing_metadata_finished == nullptr);
     s->recv_trailing_metadata_finished = add_closure_barrier(on_complete);
     s->recv_trailing_metadata =
         op_payload->recv_trailing_metadata.recv_trailing_metadata;
     s->final_metadata_requested = true;
-    grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_trailing_metadata(t, s);
   }
 
-  grpc_chttp2_complete_closure_step(exec_ctx, t, s, &on_complete,
-                                    GRPC_ERROR_NONE, "op->on_complete");
+  grpc_chttp2_complete_closure_step(t, s, &on_complete, GRPC_ERROR_NONE,
+                                    "op->on_complete");
 
   GPR_TIMER_END("perform_stream_op_locked", 0);
-  GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "perform_stream_op");
+  GRPC_CHTTP2_STREAM_UNREF(s, "perform_stream_op");
 }
 
-static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                              grpc_stream* gs,
+static void perform_stream_op(grpc_transport* gt, grpc_stream* gs,
                               grpc_transport_stream_op_batch* op) {
   GPR_TIMER_BEGIN("perform_stream_op", 0);
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
@@ -1697,32 +1619,29 @@ static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
   op->handler_private.extra_arg = gs;
   GRPC_CHTTP2_STREAM_REF(s, "perform_stream_op");
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_INIT(&op->handler_private.closure, perform_stream_op_locked,
                         op, grpc_combiner_scheduler(t->combiner)),
       GRPC_ERROR_NONE);
   GPR_TIMER_END("perform_stream_op", 0);
 }
 
-static void cancel_pings(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                         grpc_error* error) {
+static void cancel_pings(grpc_chttp2_transport* t, grpc_error* error) {
   /* callback remaining pings: they're not allowed to call into the transpot,
      and maybe they hold resources that need to be freed */
   grpc_chttp2_ping_queue* pq = &t->ping_queue;
   GPR_ASSERT(error != GRPC_ERROR_NONE);
   for (size_t j = 0; j < GRPC_CHTTP2_PCL_COUNT; j++) {
     grpc_closure_list_fail_all(&pq->lists[j], GRPC_ERROR_REF(error));
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pq->lists[j]);
+    GRPC_CLOSURE_LIST_SCHED(&pq->lists[j]);
   }
   GRPC_ERROR_UNREF(error);
 }
 
-static void send_ping_locked(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
+static void send_ping_locked(grpc_chttp2_transport* t,
                              grpc_closure* on_initiate, grpc_closure* on_ack) {
   if (t->closed_with_error != GRPC_ERROR_NONE) {
-    GRPC_CLOSURE_SCHED(exec_ctx, on_initiate,
-                       GRPC_ERROR_REF(t->closed_with_error));
-    GRPC_CLOSURE_SCHED(exec_ctx, on_ack, GRPC_ERROR_REF(t->closed_with_error));
+    GRPC_CLOSURE_SCHED(on_initiate, GRPC_ERROR_REF(t->closed_with_error));
+    GRPC_CLOSURE_SCHED(on_ack, GRPC_ERROR_REF(t->closed_with_error));
     return;
   }
   grpc_chttp2_ping_queue* pq = &t->ping_queue;
@@ -1732,18 +1651,15 @@ static void send_ping_locked(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
                            GRPC_ERROR_NONE);
 }
 
-static void retry_initiate_ping_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                       grpc_error* error) {
+static void retry_initiate_ping_locked(void* tp, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   t->ping_state.is_delayed_ping_timer_set = false;
   if (error == GRPC_ERROR_NONE) {
-    grpc_chttp2_initiate_write(exec_ctx, t,
-                               GRPC_CHTTP2_INITIATE_WRITE_RETRY_SEND_PING);
+    grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_RETRY_SEND_PING);
   }
 }
 
-void grpc_chttp2_ack_ping(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                          uint64_t id) {
+void grpc_chttp2_ack_ping(grpc_chttp2_transport* t, uint64_t id) {
   grpc_chttp2_ping_queue* pq = &t->ping_queue;
   if (pq->inflight_id != id) {
     char* from = grpc_endpoint_get_peer(t->ep);
@@ -1751,54 +1667,48 @@ void grpc_chttp2_ack_ping(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
     gpr_free(from);
     return;
   }
-  GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pq->lists[GRPC_CHTTP2_PCL_INFLIGHT]);
+  GRPC_CLOSURE_LIST_SCHED(&pq->lists[GRPC_CHTTP2_PCL_INFLIGHT]);
   if (!grpc_closure_list_empty(pq->lists[GRPC_CHTTP2_PCL_NEXT])) {
-    grpc_chttp2_initiate_write(exec_ctx, t,
-                               GRPC_CHTTP2_INITIATE_WRITE_CONTINUE_PINGS);
+    grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_CONTINUE_PINGS);
   }
 }
 
-static void send_goaway(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                        grpc_error* error) {
+static void send_goaway(grpc_chttp2_transport* t, grpc_error* error) {
   t->sent_goaway_state = GRPC_CHTTP2_GOAWAY_SEND_SCHEDULED;
   grpc_http2_error_code http_error;
   grpc_slice slice;
-  grpc_error_get_status(exec_ctx, error, GRPC_MILLIS_INF_FUTURE, nullptr,
-                        &slice, &http_error, nullptr);
+  grpc_error_get_status(error, GRPC_MILLIS_INF_FUTURE, nullptr, &slice,
+                        &http_error, nullptr);
   grpc_chttp2_goaway_append(t->last_new_stream_id, (uint32_t)http_error,
                             grpc_slice_ref_internal(slice), &t->qbuf);
-  grpc_chttp2_initiate_write(exec_ctx, t,
-                             GRPC_CHTTP2_INITIATE_WRITE_GOAWAY_SENT);
+  grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_GOAWAY_SENT);
   GRPC_ERROR_UNREF(error);
 }
 
-void grpc_chttp2_add_ping_strike(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t) {
+void grpc_chttp2_add_ping_strike(grpc_chttp2_transport* t) {
   t->ping_recv_state.ping_strikes++;
   if (++t->ping_recv_state.ping_strikes > t->ping_policy.max_ping_strikes &&
       t->ping_policy.max_ping_strikes != 0) {
-    send_goaway(exec_ctx, t,
+    send_goaway(t,
                 grpc_error_set_int(
                     GRPC_ERROR_CREATE_FROM_STATIC_STRING("too_many_pings"),
                     GRPC_ERROR_INT_HTTP2_ERROR, GRPC_HTTP2_ENHANCE_YOUR_CALM));
     /*The transport will be closed after the write is done */
     close_transport_locked(
-        exec_ctx, t,
-        grpc_error_set_int(
-            GRPC_ERROR_CREATE_FROM_STATIC_STRING("Too many pings"),
-            GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE));
+        t, grpc_error_set_int(
+               GRPC_ERROR_CREATE_FROM_STATIC_STRING("Too many pings"),
+               GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE));
   }
 }
 
-static void perform_transport_op_locked(grpc_exec_ctx* exec_ctx,
-                                        void* stream_op,
+static void perform_transport_op_locked(void* stream_op,
                                         grpc_error* error_ignored) {
   grpc_transport_op* op = (grpc_transport_op*)stream_op;
   grpc_chttp2_transport* t =
       (grpc_chttp2_transport*)op->handler_private.extra_arg;
 
   if (op->goaway_error) {
-    send_goaway(exec_ctx, t, op->goaway_error);
+    send_goaway(t, op->goaway_error);
   }
 
   if (op->set_accept_stream) {
@@ -1808,43 +1718,40 @@ static void perform_transport_op_locked(grpc_exec_ctx* exec_ctx,
   }
 
   if (op->bind_pollset) {
-    grpc_endpoint_add_to_pollset(exec_ctx, t->ep, op->bind_pollset);
+    grpc_endpoint_add_to_pollset(t->ep, op->bind_pollset);
   }
 
   if (op->bind_pollset_set) {
-    grpc_endpoint_add_to_pollset_set(exec_ctx, t->ep, op->bind_pollset_set);
+    grpc_endpoint_add_to_pollset_set(t->ep, op->bind_pollset_set);
   }
 
-  if (op->send_ping) {
-    send_ping_locked(exec_ctx, t, nullptr, op->send_ping);
-    grpc_chttp2_initiate_write(exec_ctx, t,
-                               GRPC_CHTTP2_INITIATE_WRITE_APPLICATION_PING);
+  if (op->send_ping.on_initiate != nullptr || op->send_ping.on_ack != nullptr) {
+    send_ping_locked(t, op->send_ping.on_initiate, op->send_ping.on_ack);
+    grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_APPLICATION_PING);
   }
 
   if (op->on_connectivity_state_change != nullptr) {
     grpc_connectivity_state_notify_on_state_change(
-        exec_ctx, &t->channel_callback.state_tracker, op->connectivity_state,
+        &t->channel_callback.state_tracker, op->connectivity_state,
         op->on_connectivity_state_change);
   }
 
   if (op->disconnect_with_error != GRPC_ERROR_NONE) {
-    close_transport_locked(exec_ctx, t, op->disconnect_with_error);
+    close_transport_locked(t, op->disconnect_with_error);
   }
 
-  GRPC_CLOSURE_RUN(exec_ctx, op->on_consumed, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_RUN(op->on_consumed, GRPC_ERROR_NONE);
 
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "transport_op");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "transport_op");
 }
 
-static void perform_transport_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                                 grpc_transport_op* op) {
+static void perform_transport_op(grpc_transport* gt, grpc_transport_op* op) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
   char* msg = grpc_transport_op_string(op);
   gpr_free(msg);
   op->handler_private.extra_arg = gt;
   GRPC_CHTTP2_REF_TRANSPORT(t, "transport_op");
-  GRPC_CLOSURE_SCHED(exec_ctx,
-                     GRPC_CLOSURE_INIT(&op->handler_private.closure,
+  GRPC_CLOSURE_SCHED(GRPC_CLOSURE_INIT(&op->handler_private.closure,
                                        perform_transport_op_locked, op,
                                        grpc_combiner_scheduler(t->combiner)),
                      GRPC_ERROR_NONE);
@@ -1854,36 +1761,33 @@ static void perform_transport_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
  * INPUT PROCESSING - GENERAL
  */
 
-void grpc_chttp2_maybe_complete_recv_initial_metadata(grpc_exec_ctx* exec_ctx,
-                                                      grpc_chttp2_transport* t,
+void grpc_chttp2_maybe_complete_recv_initial_metadata(grpc_chttp2_transport* t,
                                                       grpc_chttp2_stream* s) {
   if (s->recv_initial_metadata_ready != nullptr &&
       s->published_metadata[0] != GRPC_METADATA_NOT_PUBLISHED) {
     if (s->seen_error) {
-      grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &s->frame_storage);
+      grpc_slice_buffer_reset_and_unref_internal(&s->frame_storage);
       if (!s->pending_byte_stream) {
         grpc_slice_buffer_reset_and_unref_internal(
-            exec_ctx, &s->unprocessed_incoming_frames_buffer);
+            &s->unprocessed_incoming_frames_buffer);
       }
     }
-    grpc_chttp2_incoming_metadata_buffer_publish(
-        exec_ctx, &s->metadata_buffer[0], s->recv_initial_metadata);
-    null_then_run_closure(exec_ctx, &s->recv_initial_metadata_ready,
-                          GRPC_ERROR_NONE);
+    grpc_chttp2_incoming_metadata_buffer_publish(&s->metadata_buffer[0],
+                                                 s->recv_initial_metadata);
+    null_then_run_closure(&s->recv_initial_metadata_ready, GRPC_ERROR_NONE);
   }
 }
 
-void grpc_chttp2_maybe_complete_recv_message(grpc_exec_ctx* exec_ctx,
-                                             grpc_chttp2_transport* t,
+void grpc_chttp2_maybe_complete_recv_message(grpc_chttp2_transport* t,
                                              grpc_chttp2_stream* s) {
   grpc_error* error = GRPC_ERROR_NONE;
   if (s->recv_message_ready != nullptr) {
     *s->recv_message = nullptr;
     if (s->final_metadata_requested && s->seen_error) {
-      grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &s->frame_storage);
+      grpc_slice_buffer_reset_and_unref_internal(&s->frame_storage);
       if (!s->pending_byte_stream) {
         grpc_slice_buffer_reset_and_unref_internal(
-            exec_ctx, &s->unprocessed_incoming_frames_buffer);
+            &s->unprocessed_incoming_frames_buffer);
       }
     }
     if (!s->pending_byte_stream) {
@@ -1910,10 +1814,9 @@ void grpc_chttp2_maybe_complete_recv_message(grpc_exec_ctx* exec_ctx,
                   &s->decompressed_data_buffer, nullptr,
                   GRPC_HEADER_SIZE_IN_BYTES - s->decompressed_header_bytes,
                   &end_of_context)) {
-            grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                                       &s->frame_storage);
+            grpc_slice_buffer_reset_and_unref_internal(&s->frame_storage);
             grpc_slice_buffer_reset_and_unref_internal(
-                exec_ctx, &s->unprocessed_incoming_frames_buffer);
+                &s->unprocessed_incoming_frames_buffer);
             error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                 "Stream decompression error.");
           } else {
@@ -1922,8 +1825,8 @@ void grpc_chttp2_maybe_complete_recv_message(grpc_exec_ctx* exec_ctx,
               s->decompressed_header_bytes = 0;
             }
             error = grpc_deframe_unprocessed_incoming_frames(
-                exec_ctx, &s->data_parser, s, &s->decompressed_data_buffer,
-                nullptr, s->recv_message);
+                &s->data_parser, s, &s->decompressed_data_buffer, nullptr,
+                s->recv_message);
             if (end_of_context) {
               grpc_stream_compression_context_destroy(
                   s->stream_decompression_ctx);
@@ -1932,15 +1835,14 @@ void grpc_chttp2_maybe_complete_recv_message(grpc_exec_ctx* exec_ctx,
           }
         } else {
           error = grpc_deframe_unprocessed_incoming_frames(
-              exec_ctx, &s->data_parser, s,
-              &s->unprocessed_incoming_frames_buffer, nullptr, s->recv_message);
+              &s->data_parser, s, &s->unprocessed_incoming_frames_buffer,
+              nullptr, s->recv_message);
         }
         if (error != GRPC_ERROR_NONE) {
           s->seen_error = true;
-          grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                                     &s->frame_storage);
+          grpc_slice_buffer_reset_and_unref_internal(&s->frame_storage);
           grpc_slice_buffer_reset_and_unref_internal(
-              exec_ctx, &s->unprocessed_incoming_frames_buffer);
+              &s->unprocessed_incoming_frames_buffer);
           break;
         } else if (*s->recv_message != nullptr) {
           break;
@@ -1948,26 +1850,25 @@ void grpc_chttp2_maybe_complete_recv_message(grpc_exec_ctx* exec_ctx,
       }
     }
     if (error == GRPC_ERROR_NONE && *s->recv_message != nullptr) {
-      null_then_run_closure(exec_ctx, &s->recv_message_ready, GRPC_ERROR_NONE);
+      null_then_run_closure(&s->recv_message_ready, GRPC_ERROR_NONE);
     } else if (s->published_metadata[1] != GRPC_METADATA_NOT_PUBLISHED) {
       *s->recv_message = nullptr;
-      null_then_run_closure(exec_ctx, &s->recv_message_ready, GRPC_ERROR_NONE);
+      null_then_run_closure(&s->recv_message_ready, GRPC_ERROR_NONE);
     }
     GRPC_ERROR_UNREF(error);
   }
 }
 
-void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_exec_ctx* exec_ctx,
-                                                       grpc_chttp2_transport* t,
+void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_chttp2_transport* t,
                                                        grpc_chttp2_stream* s) {
-  grpc_chttp2_maybe_complete_recv_message(exec_ctx, t, s);
+  grpc_chttp2_maybe_complete_recv_message(t, s);
   if (s->recv_trailing_metadata_finished != nullptr && s->read_closed &&
       s->write_closed) {
     if (s->seen_error) {
-      grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &s->frame_storage);
+      grpc_slice_buffer_reset_and_unref_internal(&s->frame_storage);
       if (!s->pending_byte_stream) {
         grpc_slice_buffer_reset_and_unref_internal(
-            exec_ctx, &s->unprocessed_incoming_frames_buffer);
+            &s->unprocessed_incoming_frames_buffer);
       }
     }
     bool pending_data = s->pending_byte_stream ||
@@ -1985,9 +1886,9 @@ void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_exec_ctx* exec_ctx,
               s->stream_decompression_ctx, &s->frame_storage,
               &s->unprocessed_incoming_frames_buffer, nullptr,
               GRPC_HEADER_SIZE_IN_BYTES, &end_of_context)) {
-        grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &s->frame_storage);
+        grpc_slice_buffer_reset_and_unref_internal(&s->frame_storage);
         grpc_slice_buffer_reset_and_unref_internal(
-            exec_ctx, &s->unprocessed_incoming_frames_buffer);
+            &s->unprocessed_incoming_frames_buffer);
         s->seen_error = true;
       } else {
         if (s->unprocessed_incoming_frames_buffer.length > 0) {
@@ -2002,23 +1903,23 @@ void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_exec_ctx* exec_ctx,
     }
     if (s->read_closed && s->frame_storage.length == 0 && !pending_data &&
         s->recv_trailing_metadata_finished != nullptr) {
-      grpc_chttp2_incoming_metadata_buffer_publish(
-          exec_ctx, &s->metadata_buffer[1], s->recv_trailing_metadata);
+      grpc_chttp2_incoming_metadata_buffer_publish(&s->metadata_buffer[1],
+                                                   s->recv_trailing_metadata);
       grpc_chttp2_complete_closure_step(
-          exec_ctx, t, s, &s->recv_trailing_metadata_finished, GRPC_ERROR_NONE,
+          t, s, &s->recv_trailing_metadata_finished, GRPC_ERROR_NONE,
           "recv_trailing_metadata_finished");
     }
   }
 }
 
-static void remove_stream(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                          uint32_t id, grpc_error* error) {
+static void remove_stream(grpc_chttp2_transport* t, uint32_t id,
+                          grpc_error* error) {
   grpc_chttp2_stream* s =
       (grpc_chttp2_stream*)grpc_chttp2_stream_map_delete(&t->stream_map, id);
   GPR_ASSERT(s);
   if (t->incoming_stream == s) {
     t->incoming_stream = nullptr;
-    grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
+    grpc_chttp2_parsing_become_skip_parser(t);
   }
   if (s->pending_byte_stream) {
     if (s->on_next != nullptr) {
@@ -2026,8 +1927,8 @@ static void remove_stream(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
       if (error == GRPC_ERROR_NONE) {
         error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Truncated message");
       }
-      incoming_byte_stream_publish_error(exec_ctx, bs, error);
-      incoming_byte_stream_unref(exec_ctx, bs);
+      incoming_byte_stream_publish_error(bs, error);
+      incoming_byte_stream_unref(bs);
       s->data_parser.parsing_frame = nullptr;
     } else {
       GRPC_ERROR_UNREF(s->byte_stream_error);
@@ -2036,56 +1937,52 @@ static void remove_stream(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
   }
 
   if (grpc_chttp2_stream_map_size(&t->stream_map) == 0) {
-    post_benign_reclaimer(exec_ctx, t);
+    post_benign_reclaimer(t);
     if (t->sent_goaway_state == GRPC_CHTTP2_GOAWAY_SENT) {
       close_transport_locked(
-          exec_ctx, t,
-          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-              "Last stream closed after sending GOAWAY", &error, 1));
+          t, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                 "Last stream closed after sending GOAWAY", &error, 1));
     }
   }
   if (grpc_chttp2_list_remove_writable_stream(t, s)) {
-    GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2_writing:remove_stream");
+    GRPC_CHTTP2_STREAM_UNREF(s, "chttp2_writing:remove_stream");
   }
 
   GRPC_ERROR_UNREF(error);
 
-  maybe_start_some_streams(exec_ctx, t);
+  maybe_start_some_streams(t);
 }
 
-void grpc_chttp2_cancel_stream(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+void grpc_chttp2_cancel_stream(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
                                grpc_error* due_to_error) {
   if (!t->is_client && !s->sent_trailing_metadata &&
       grpc_error_has_clear_grpc_status(due_to_error)) {
-    close_from_api(exec_ctx, t, s, due_to_error);
+    close_from_api(t, s, due_to_error);
     return;
   }
 
   if (!s->read_closed || !s->write_closed) {
     if (s->id != 0) {
       grpc_http2_error_code http_error;
-      grpc_error_get_status(exec_ctx, due_to_error, s->deadline, nullptr,
-                            nullptr, &http_error, nullptr);
+      grpc_error_get_status(due_to_error, s->deadline, nullptr, nullptr,
+                            &http_error, nullptr);
       grpc_slice_buffer_add(
           &t->qbuf, grpc_chttp2_rst_stream_create(s->id, (uint32_t)http_error,
                                                   &s->stats.outgoing));
-      grpc_chttp2_initiate_write(exec_ctx, t,
-                                 GRPC_CHTTP2_INITIATE_WRITE_RST_STREAM);
+      grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_RST_STREAM);
     }
   }
   if (due_to_error != GRPC_ERROR_NONE && !s->seen_error) {
     s->seen_error = true;
   }
-  grpc_chttp2_mark_stream_closed(exec_ctx, t, s, 1, 1, due_to_error);
+  grpc_chttp2_mark_stream_closed(t, s, 1, 1, due_to_error);
 }
 
-void grpc_chttp2_fake_status(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                             grpc_chttp2_stream* s, grpc_error* error) {
+void grpc_chttp2_fake_status(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+                             grpc_error* error) {
   grpc_status_code status;
   grpc_slice slice;
-  grpc_error_get_status(exec_ctx, error, s->deadline, &status, &slice, nullptr,
-                        nullptr);
+  grpc_error_get_status(error, s->deadline, &status, &slice, nullptr, nullptr);
   if (status != GRPC_STATUS_OK) {
     s->seen_error = true;
   }
@@ -2101,20 +1998,20 @@ void grpc_chttp2_fake_status(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
     gpr_ltoa(status, status_string);
     GRPC_LOG_IF_ERROR("add_status",
                       grpc_chttp2_incoming_metadata_buffer_replace_or_add(
-                          exec_ctx, &s->metadata_buffer[1],
+                          &s->metadata_buffer[1],
                           grpc_mdelem_from_slices(
-                              exec_ctx, GRPC_MDSTR_GRPC_STATUS,
+                              GRPC_MDSTR_GRPC_STATUS,
                               grpc_slice_from_copied_string(status_string))));
     if (!GRPC_SLICE_IS_EMPTY(slice)) {
       GRPC_LOG_IF_ERROR(
           "add_status_message",
           grpc_chttp2_incoming_metadata_buffer_replace_or_add(
-              exec_ctx, &s->metadata_buffer[1],
-              grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_GRPC_MESSAGE,
+              &s->metadata_buffer[1],
+              grpc_mdelem_from_slices(GRPC_MDSTR_GRPC_MESSAGE,
                                       grpc_slice_ref_internal(slice))));
     }
     s->published_metadata[1] = GRPC_METADATA_SYNTHESIZED_FROM_FAKE;
-    grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_trailing_metadata(t, s);
   }
 
   GRPC_ERROR_UNREF(error);
@@ -2147,14 +2044,12 @@ static grpc_error* removal_error(grpc_error* extra_error, grpc_chttp2_stream* s,
   return error;
 }
 
-static void flush_write_list(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                             grpc_chttp2_stream* s, grpc_chttp2_write_cb** list,
-                             grpc_error* error) {
+static void flush_write_list(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+                             grpc_chttp2_write_cb** list, grpc_error* error) {
   while (*list) {
     grpc_chttp2_write_cb* cb = *list;
     *list = cb->next;
-    grpc_chttp2_complete_closure_step(exec_ctx, t, s, &cb->closure,
-                                      GRPC_ERROR_REF(error),
+    grpc_chttp2_complete_closure_step(t, s, &cb->closure, GRPC_ERROR_REF(error),
                                       "on_write_finished_cb");
     cb->next = t->write_cb_pool;
     t->write_cb_pool = cb;
@@ -2162,37 +2057,34 @@ static void flush_write_list(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
   GRPC_ERROR_UNREF(error);
 }
 
-void grpc_chttp2_fail_pending_writes(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+void grpc_chttp2_fail_pending_writes(grpc_chttp2_transport* t,
                                      grpc_chttp2_stream* s, grpc_error* error) {
   error =
       removal_error(error, s, "Pending writes failed due to stream closure");
   s->send_initial_metadata = nullptr;
-  grpc_chttp2_complete_closure_step(
-      exec_ctx, t, s, &s->send_initial_metadata_finished, GRPC_ERROR_REF(error),
-      "send_initial_metadata_finished");
+  grpc_chttp2_complete_closure_step(t, s, &s->send_initial_metadata_finished,
+                                    GRPC_ERROR_REF(error),
+                                    "send_initial_metadata_finished");
 
   s->send_trailing_metadata = nullptr;
-  grpc_chttp2_complete_closure_step(
-      exec_ctx, t, s, &s->send_trailing_metadata_finished,
-      GRPC_ERROR_REF(error), "send_trailing_metadata_finished");
+  grpc_chttp2_complete_closure_step(t, s, &s->send_trailing_metadata_finished,
+                                    GRPC_ERROR_REF(error),
+                                    "send_trailing_metadata_finished");
 
   s->fetching_send_message = nullptr;
-  grpc_chttp2_complete_closure_step(
-      exec_ctx, t, s, &s->fetching_send_message_finished, GRPC_ERROR_REF(error),
-      "fetching_send_message_finished");
-  flush_write_list(exec_ctx, t, s, &s->on_write_finished_cbs,
-                   GRPC_ERROR_REF(error));
-  flush_write_list(exec_ctx, t, s, &s->on_flow_controlled_cbs, error);
+  grpc_chttp2_complete_closure_step(t, s, &s->fetching_send_message_finished,
+                                    GRPC_ERROR_REF(error),
+                                    "fetching_send_message_finished");
+  flush_write_list(t, s, &s->on_write_finished_cbs, GRPC_ERROR_REF(error));
+  flush_write_list(t, s, &s->on_flow_controlled_cbs, error);
 }
 
-void grpc_chttp2_mark_stream_closed(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_transport* t,
+void grpc_chttp2_mark_stream_closed(grpc_chttp2_transport* t,
                                     grpc_chttp2_stream* s, int close_reads,
                                     int close_writes, grpc_error* error) {
   if (s->read_closed && s->write_closed) {
     /* already closed */
-    grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_trailing_metadata(t, s);
     GRPC_ERROR_UNREF(error);
     return;
   }
@@ -2206,20 +2098,20 @@ void grpc_chttp2_mark_stream_closed(grpc_exec_ctx* exec_ctx,
   if (close_writes && !s->write_closed) {
     s->write_closed_error = GRPC_ERROR_REF(error);
     s->write_closed = true;
-    grpc_chttp2_fail_pending_writes(exec_ctx, t, s, GRPC_ERROR_REF(error));
+    grpc_chttp2_fail_pending_writes(t, s, GRPC_ERROR_REF(error));
   }
   if (s->read_closed && s->write_closed) {
     became_closed = true;
     grpc_error* overall_error =
         removal_error(GRPC_ERROR_REF(error), s, "Stream removed");
     if (s->id != 0) {
-      remove_stream(exec_ctx, t, s->id, GRPC_ERROR_REF(overall_error));
+      remove_stream(t, s->id, GRPC_ERROR_REF(overall_error));
     } else {
       /* Purge streams waiting on concurrency still waiting for id assignment */
       grpc_chttp2_list_remove_waiting_for_concurrency(t, s);
     }
     if (overall_error != GRPC_ERROR_NONE) {
-      grpc_chttp2_fake_status(exec_ctx, t, s, overall_error);
+      grpc_chttp2_fake_status(t, s, overall_error);
     }
   }
   if (closed_read) {
@@ -2228,18 +2120,18 @@ void grpc_chttp2_mark_stream_closed(grpc_exec_ctx* exec_ctx,
         s->published_metadata[i] = GPRC_METADATA_PUBLISHED_AT_CLOSE;
       }
     }
-    grpc_chttp2_maybe_complete_recv_initial_metadata(exec_ctx, t, s);
-    grpc_chttp2_maybe_complete_recv_message(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_initial_metadata(t, s);
+    grpc_chttp2_maybe_complete_recv_message(t, s);
   }
   if (became_closed) {
-    grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, t, s);
-    GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2");
+    grpc_chttp2_maybe_complete_recv_trailing_metadata(t, s);
+    GRPC_CHTTP2_STREAM_UNREF(s, "chttp2");
   }
   GRPC_ERROR_UNREF(error);
 }
 
-static void close_from_api(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                           grpc_chttp2_stream* s, grpc_error* error) {
+static void close_from_api(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+                           grpc_error* error) {
   grpc_slice hdr;
   grpc_slice status_hdr;
   grpc_slice http_status_hdr;
@@ -2249,8 +2141,8 @@ static void close_from_api(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
   uint32_t len = 0;
   grpc_status_code grpc_status;
   grpc_slice slice;
-  grpc_error_get_status(exec_ctx, error, s->deadline, &grpc_status, &slice,
-                        nullptr, nullptr);
+  grpc_error_get_status(error, s->deadline, &grpc_status, &slice, nullptr,
+                        nullptr);
 
   GPR_ASSERT(grpc_status >= 0 && (int)grpc_status < 100);
 
@@ -2392,13 +2284,11 @@ static void close_from_api(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
       &t->qbuf, grpc_chttp2_rst_stream_create(s->id, GRPC_HTTP2_NO_ERROR,
                                               &s->stats.outgoing));
 
-  grpc_chttp2_mark_stream_closed(exec_ctx, t, s, 1, 1, error);
-  grpc_chttp2_initiate_write(exec_ctx, t,
-                             GRPC_CHTTP2_INITIATE_WRITE_CLOSE_FROM_API);
+  grpc_chttp2_mark_stream_closed(t, s, 1, 1, error);
+  grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_CLOSE_FROM_API);
 }
 
 typedef struct {
-  grpc_exec_ctx* exec_ctx;
   grpc_error* error;
   grpc_chttp2_transport* t;
 } cancel_stream_cb_args;
@@ -2406,13 +2296,11 @@ typedef struct {
 static void cancel_stream_cb(void* user_data, uint32_t key, void* stream) {
   cancel_stream_cb_args* args = (cancel_stream_cb_args*)user_data;
   grpc_chttp2_stream* s = (grpc_chttp2_stream*)stream;
-  grpc_chttp2_cancel_stream(args->exec_ctx, args->t, s,
-                            GRPC_ERROR_REF(args->error));
+  grpc_chttp2_cancel_stream(args->t, s, GRPC_ERROR_REF(args->error));
 }
 
-static void end_all_the_calls(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                              grpc_error* error) {
-  cancel_stream_cb_args args = {exec_ctx, error, t};
+static void end_all_the_calls(grpc_chttp2_transport* t, grpc_error* error) {
+  cancel_stream_cb_args args = {error, t};
   grpc_chttp2_stream_map_for_each(&t->stream_map, cancel_stream_cb, &args);
   GRPC_ERROR_UNREF(error);
 }
@@ -2422,14 +2310,14 @@ static void end_all_the_calls(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
  */
 
 template <class F>
-static void WithUrgency(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
+static void WithUrgency(grpc_chttp2_transport* t,
                         grpc_core::chttp2::FlowControlAction::Urgency urgency,
                         grpc_chttp2_initiate_write_reason reason, F action) {
   switch (urgency) {
     case grpc_core::chttp2::FlowControlAction::Urgency::NO_ACTION_NEEDED:
       break;
     case grpc_core::chttp2::FlowControlAction::Urgency::UPDATE_IMMEDIATELY:
-      grpc_chttp2_initiate_write(exec_ctx, t, reason);
+      grpc_chttp2_initiate_write(t, reason);
     // fallthrough
     case grpc_core::chttp2::FlowControlAction::Urgency::QUEUE_UPDATE:
       action();
@@ -2438,31 +2326,27 @@ static void WithUrgency(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
 }
 
 void grpc_chttp2_act_on_flowctl_action(
-    grpc_exec_ctx* exec_ctx, const grpc_core::chttp2::FlowControlAction& action,
+    const grpc_core::chttp2::FlowControlAction& action,
     grpc_chttp2_transport* t, grpc_chttp2_stream* s) {
-  WithUrgency(
-      exec_ctx, t, action.send_stream_update(),
-      GRPC_CHTTP2_INITIATE_WRITE_STREAM_FLOW_CONTROL,
-      [exec_ctx, t, s]() { grpc_chttp2_mark_stream_writable(exec_ctx, t, s); });
-  WithUrgency(exec_ctx, t, action.send_transport_update(),
+  WithUrgency(t, action.send_stream_update(),
+              GRPC_CHTTP2_INITIATE_WRITE_STREAM_FLOW_CONTROL,
+              [t, s]() { grpc_chttp2_mark_stream_writable(t, s); });
+  WithUrgency(t, action.send_transport_update(),
               GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL, []() {});
-  WithUrgency(exec_ctx, t, action.send_initial_window_update(),
-              GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS,
-              [exec_ctx, t, &action]() {
-                queue_setting_update(exec_ctx, t,
+  WithUrgency(t, action.send_initial_window_update(),
+              GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS, [t, &action]() {
+                queue_setting_update(t,
                                      GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE,
                                      action.initial_window_size());
               });
-  WithUrgency(
-      exec_ctx, t, action.send_max_frame_size_update(),
-      GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS, [exec_ctx, t, &action]() {
-        queue_setting_update(exec_ctx, t, GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE,
-                             action.max_frame_size());
-      });
+  WithUrgency(t, action.send_max_frame_size_update(),
+              GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS, [t, &action]() {
+                queue_setting_update(t, GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE,
+                                     action.max_frame_size());
+              });
 }
 
-static grpc_error* try_http_parsing(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_transport* t) {
+static grpc_error* try_http_parsing(grpc_chttp2_transport* t) {
   grpc_http_parser parser;
   size_t i = 0;
   grpc_error* error = GRPC_ERROR_NONE;
@@ -2491,8 +2375,7 @@ static grpc_error* try_http_parsing(grpc_exec_ctx* exec_ctx,
   return error;
 }
 
-static void read_action_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                               grpc_error* error) {
+static void read_action_locked(void* tp, grpc_error* error) {
   GPR_TIMER_BEGIN("reading_action_locked", 0);
 
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
@@ -2516,11 +2399,10 @@ static void read_action_locked(grpc_exec_ctx* exec_ctx, void* tp,
     for (; i < t->read_buffer.count && errors[1] == GRPC_ERROR_NONE; i++) {
       t->flow_control->bdp_estimator()->AddIncomingBytes(
           (int64_t)GRPC_SLICE_LENGTH(t->read_buffer.slices[i]));
-      errors[1] =
-          grpc_chttp2_perform_read(exec_ctx, t, t->read_buffer.slices[i]);
+      errors[1] = grpc_chttp2_perform_read(t, t->read_buffer.slices[i]);
     }
     if (errors[1] != GRPC_ERROR_NONE) {
-      errors[2] = try_http_parsing(exec_ctx, t);
+      errors[2] = try_http_parsing(t);
       GRPC_ERROR_UNREF(error);
       error = GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
           "Failed parsing HTTP/2", errors, GPR_ARRAY_SIZE(errors));
@@ -2535,10 +2417,9 @@ static void read_action_locked(grpc_exec_ctx* exec_ctx, void* tp,
       if (t->initial_window_update > 0) {
         grpc_chttp2_stream* s;
         while (grpc_chttp2_list_pop_stalled_by_stream(t, &s)) {
-          grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+          grpc_chttp2_mark_stream_writable(t, s);
           grpc_chttp2_initiate_write(
-              exec_ctx, t,
-              GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_SETTING);
+              t, GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_SETTING);
         }
       }
       t->initial_window_update = 0;
@@ -2559,22 +2440,21 @@ static void read_action_locked(grpc_exec_ctx* exec_ctx, void* tp,
       error = grpc_error_add_child(error, GRPC_ERROR_REF(t->goaway_error));
     }
 
-    close_transport_locked(exec_ctx, t, GRPC_ERROR_REF(error));
+    close_transport_locked(t, GRPC_ERROR_REF(error));
     t->endpoint_reading = 0;
   } else if (t->closed_with_error == GRPC_ERROR_NONE) {
     keep_reading = true;
     GRPC_CHTTP2_REF_TRANSPORT(t, "keep_reading");
   }
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &t->read_buffer);
+  grpc_slice_buffer_reset_and_unref_internal(&t->read_buffer);
 
   if (keep_reading) {
-    grpc_endpoint_read(exec_ctx, t->ep, &t->read_buffer,
-                       &t->read_action_locked);
-    grpc_chttp2_act_on_flowctl_action(exec_ctx, t->flow_control->MakeAction(),
-                                      t, nullptr);
-    GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "keep_reading");
+    grpc_endpoint_read(t->ep, &t->read_buffer, &t->read_action_locked);
+    grpc_chttp2_act_on_flowctl_action(t->flow_control->MakeAction(), t,
+                                      nullptr);
+    GRPC_CHTTP2_UNREF_TRANSPORT(t, "keep_reading");
   } else {
-    GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "reading_action");
+    GRPC_CHTTP2_UNREF_TRANSPORT(t, "reading_action");
   }
 
   GPR_TIMER_END("post_reading_action_locked", 0);
@@ -2586,15 +2466,12 @@ static void read_action_locked(grpc_exec_ctx* exec_ctx, void* tp,
 
 // t is reffed prior to calling the first time, and once the callback chain
 // that kicks off finishes, it's unreffed
-static void schedule_bdp_ping_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t) {
+static void schedule_bdp_ping_locked(grpc_chttp2_transport* t) {
   t->flow_control->bdp_estimator()->SchedulePing();
-  send_ping_locked(exec_ctx, t, &t->start_bdp_ping_locked,
-                   &t->finish_bdp_ping_locked);
+  send_ping_locked(t, &t->start_bdp_ping_locked, &t->finish_bdp_ping_locked);
 }
 
-static void start_bdp_ping_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                  grpc_error* error) {
+static void start_bdp_ping_locked(void* tp, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   if (grpc_http_trace.enabled()) {
     gpr_log(GPR_DEBUG, "%s: Start BDP ping err=%s", t->peer_string,
@@ -2602,42 +2479,39 @@ static void start_bdp_ping_locked(grpc_exec_ctx* exec_ctx, void* tp,
   }
   /* Reset the keepalive ping timer */
   if (t->keepalive_state == GRPC_CHTTP2_KEEPALIVE_STATE_WAITING) {
-    grpc_timer_cancel(exec_ctx, &t->keepalive_ping_timer);
+    grpc_timer_cancel(&t->keepalive_ping_timer);
   }
   t->flow_control->bdp_estimator()->StartPing();
 }
 
-static void finish_bdp_ping_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                   grpc_error* error) {
+static void finish_bdp_ping_locked(void* tp, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   if (grpc_http_trace.enabled()) {
     gpr_log(GPR_DEBUG, "%s: Complete BDP ping err=%s", t->peer_string,
             grpc_error_string(error));
   }
   if (error != GRPC_ERROR_NONE) {
-    GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "bdp_ping");
+    GRPC_CHTTP2_UNREF_TRANSPORT(t, "bdp_ping");
     return;
   }
-  grpc_millis next_ping =
-      t->flow_control->bdp_estimator()->CompletePing(exec_ctx);
-  grpc_chttp2_act_on_flowctl_action(
-      exec_ctx, t->flow_control->PeriodicUpdate(exec_ctx), t, nullptr);
+  grpc_millis next_ping = t->flow_control->bdp_estimator()->CompletePing();
+  grpc_chttp2_act_on_flowctl_action(t->flow_control->PeriodicUpdate(), t,
+                                    nullptr);
   GPR_ASSERT(!t->have_next_bdp_ping_timer);
   t->have_next_bdp_ping_timer = true;
-  grpc_timer_init(exec_ctx, &t->next_bdp_ping_timer, next_ping,
+  grpc_timer_init(&t->next_bdp_ping_timer, next_ping,
                   &t->next_bdp_ping_timer_expired_locked);
 }
 
-static void next_bdp_ping_timer_expired_locked(grpc_exec_ctx* exec_ctx,
-                                               void* tp, grpc_error* error) {
+static void next_bdp_ping_timer_expired_locked(void* tp, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   GPR_ASSERT(t->have_next_bdp_ping_timer);
   t->have_next_bdp_ping_timer = false;
   if (error != GRPC_ERROR_NONE) {
-    GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "bdp_ping");
+    GRPC_CHTTP2_UNREF_TRANSPORT(t, "bdp_ping");
     return;
   }
-  schedule_bdp_ping_locked(exec_ctx, t);
+  schedule_bdp_ping_locked(t);
 }
 
 void grpc_chttp2_config_default_keepalive_args(grpc_channel_args* args,
@@ -2698,8 +2572,7 @@ void grpc_chttp2_config_default_keepalive_args(grpc_channel_args* args,
   }
 }
 
-static void init_keepalive_ping_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                       grpc_error* error) {
+static void init_keepalive_ping_locked(void* arg, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
   GPR_ASSERT(t->keepalive_state == GRPC_CHTTP2_KEEPALIVE_STATE_WAITING);
   if (t->destroying || t->closed_with_error != GRPC_ERROR_NONE) {
@@ -2709,59 +2582,55 @@ static void init_keepalive_ping_locked(grpc_exec_ctx* exec_ctx, void* arg,
         grpc_chttp2_stream_map_size(&t->stream_map) > 0) {
       t->keepalive_state = GRPC_CHTTP2_KEEPALIVE_STATE_PINGING;
       GRPC_CHTTP2_REF_TRANSPORT(t, "keepalive ping end");
-      send_ping_locked(exec_ctx, t, &t->start_keepalive_ping_locked,
+      send_ping_locked(t, &t->start_keepalive_ping_locked,
                        &t->finish_keepalive_ping_locked);
-      grpc_chttp2_initiate_write(exec_ctx, t,
-                                 GRPC_CHTTP2_INITIATE_WRITE_KEEPALIVE_PING);
+      grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_KEEPALIVE_PING);
     } else {
       GRPC_CHTTP2_REF_TRANSPORT(t, "init keepalive ping");
-      grpc_timer_init(exec_ctx, &t->keepalive_ping_timer,
-                      grpc_exec_ctx_now(exec_ctx) + t->keepalive_time,
+      grpc_timer_init(&t->keepalive_ping_timer,
+                      grpc_core::ExecCtx::Get()->Now() + t->keepalive_time,
                       &t->init_keepalive_ping_locked);
     }
   } else if (error == GRPC_ERROR_CANCELLED) {
     /* The keepalive ping timer may be cancelled by bdp */
     GRPC_CHTTP2_REF_TRANSPORT(t, "init keepalive ping");
-    grpc_timer_init(exec_ctx, &t->keepalive_ping_timer,
-                    grpc_exec_ctx_now(exec_ctx) + t->keepalive_time,
+    grpc_timer_init(&t->keepalive_ping_timer,
+                    grpc_core::ExecCtx::Get()->Now() + t->keepalive_time,
                     &t->init_keepalive_ping_locked);
   }
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "init keepalive ping");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "init keepalive ping");
 }
 
-static void start_keepalive_ping_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void start_keepalive_ping_locked(void* arg, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
   GRPC_CHTTP2_REF_TRANSPORT(t, "keepalive watchdog");
-  grpc_timer_init(exec_ctx, &t->keepalive_watchdog_timer,
-                  grpc_exec_ctx_now(exec_ctx) + t->keepalive_time,
+  grpc_timer_init(&t->keepalive_watchdog_timer,
+                  grpc_core::ExecCtx::Get()->Now() + t->keepalive_time,
                   &t->keepalive_watchdog_fired_locked);
 }
 
-static void finish_keepalive_ping_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                         grpc_error* error) {
+static void finish_keepalive_ping_locked(void* arg, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
   if (t->keepalive_state == GRPC_CHTTP2_KEEPALIVE_STATE_PINGING) {
     if (error == GRPC_ERROR_NONE) {
       t->keepalive_state = GRPC_CHTTP2_KEEPALIVE_STATE_WAITING;
-      grpc_timer_cancel(exec_ctx, &t->keepalive_watchdog_timer);
+      grpc_timer_cancel(&t->keepalive_watchdog_timer);
       GRPC_CHTTP2_REF_TRANSPORT(t, "init keepalive ping");
-      grpc_timer_init(exec_ctx, &t->keepalive_ping_timer,
-                      grpc_exec_ctx_now(exec_ctx) + t->keepalive_time,
+      grpc_timer_init(&t->keepalive_ping_timer,
+                      grpc_core::ExecCtx::Get()->Now() + t->keepalive_time,
                       &t->init_keepalive_ping_locked);
     }
   }
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "keepalive ping end");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "keepalive ping end");
 }
 
-static void keepalive_watchdog_fired_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                            grpc_error* error) {
+static void keepalive_watchdog_fired_locked(void* arg, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
   if (t->keepalive_state == GRPC_CHTTP2_KEEPALIVE_STATE_PINGING) {
     if (error == GRPC_ERROR_NONE) {
       t->keepalive_state = GRPC_CHTTP2_KEEPALIVE_STATE_DYING;
       close_transport_locked(
-          exec_ctx, t,
+          t,
           grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                                  "keepalive watchdog timeout"),
                              GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_INTERNAL));
@@ -2774,71 +2643,67 @@ static void keepalive_watchdog_fired_locked(grpc_exec_ctx* exec_ctx, void* arg,
               t->keepalive_state, GRPC_CHTTP2_KEEPALIVE_STATE_PINGING);
     }
   }
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "keepalive watchdog");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "keepalive watchdog");
 }
 
 /*******************************************************************************
  * CALLBACK LOOP
  */
 
-static void connectivity_state_set(grpc_exec_ctx* exec_ctx,
-                                   grpc_chttp2_transport* t,
+static void connectivity_state_set(grpc_chttp2_transport* t,
                                    grpc_connectivity_state state,
                                    grpc_error* error, const char* reason) {
   GRPC_CHTTP2_IF_TRACING(
       gpr_log(GPR_DEBUG, "set connectivity_state=%d", state));
-  grpc_connectivity_state_set(exec_ctx, &t->channel_callback.state_tracker,
-                              state, error, reason);
+  grpc_connectivity_state_set(&t->channel_callback.state_tracker, state, error,
+                              reason);
 }
 
 /*******************************************************************************
  * POLLSET STUFF
  */
 
-static void set_pollset(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                        grpc_stream* gs, grpc_pollset* pollset) {
+static void set_pollset(grpc_transport* gt, grpc_stream* gs,
+                        grpc_pollset* pollset) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
-  grpc_endpoint_add_to_pollset(exec_ctx, t->ep, pollset);
+  grpc_endpoint_add_to_pollset(t->ep, pollset);
 }
 
-static void set_pollset_set(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                            grpc_stream* gs, grpc_pollset_set* pollset_set) {
+static void set_pollset_set(grpc_transport* gt, grpc_stream* gs,
+                            grpc_pollset_set* pollset_set) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
-  grpc_endpoint_add_to_pollset_set(exec_ctx, t->ep, pollset_set);
+  grpc_endpoint_add_to_pollset_set(t->ep, pollset_set);
 }
 
 /*******************************************************************************
  * BYTE STREAM
  */
 
-static void reset_byte_stream(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* error) {
+static void reset_byte_stream(void* arg, grpc_error* error) {
   grpc_chttp2_stream* s = (grpc_chttp2_stream*)arg;
 
   s->pending_byte_stream = false;
   if (error == GRPC_ERROR_NONE) {
-    grpc_chttp2_maybe_complete_recv_message(exec_ctx, s->t, s);
-    grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, s->t, s);
+    grpc_chttp2_maybe_complete_recv_message(s->t, s);
+    grpc_chttp2_maybe_complete_recv_trailing_metadata(s->t, s);
   } else {
     GPR_ASSERT(error != GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(exec_ctx, s->on_next, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(s->on_next, GRPC_ERROR_REF(error));
     s->on_next = nullptr;
     GRPC_ERROR_UNREF(s->byte_stream_error);
     s->byte_stream_error = GRPC_ERROR_NONE;
-    grpc_chttp2_cancel_stream(exec_ctx, s->t, s, GRPC_ERROR_REF(error));
+    grpc_chttp2_cancel_stream(s->t, s, GRPC_ERROR_REF(error));
     s->byte_stream_error = GRPC_ERROR_REF(error);
   }
 }
 
-static void incoming_byte_stream_unref(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_incoming_byte_stream* bs) {
+static void incoming_byte_stream_unref(grpc_chttp2_incoming_byte_stream* bs) {
   if (gpr_unref(&bs->refs)) {
     gpr_free(bs);
   }
 }
 
-static void incoming_byte_stream_next_locked(grpc_exec_ctx* exec_ctx,
-                                             void* argp,
+static void incoming_byte_stream_next_locked(void* argp,
                                              grpc_error* error_ignored) {
   grpc_chttp2_incoming_byte_stream* bs =
       (grpc_chttp2_incoming_byte_stream*)argp;
@@ -2849,30 +2714,29 @@ static void incoming_byte_stream_next_locked(grpc_exec_ctx* exec_ctx,
   if (!s->read_closed) {
     s->flow_control->IncomingByteStreamUpdate(bs->next_action.max_size_hint,
                                               cur_length);
-    grpc_chttp2_act_on_flowctl_action(exec_ctx, s->flow_control->MakeAction(),
-                                      t, s);
+    grpc_chttp2_act_on_flowctl_action(s->flow_control->MakeAction(), t, s);
   }
   GPR_ASSERT(s->unprocessed_incoming_frames_buffer.length == 0);
   if (s->frame_storage.length > 0) {
     grpc_slice_buffer_swap(&s->frame_storage,
                            &s->unprocessed_incoming_frames_buffer);
     s->unprocessed_incoming_frames_decompressed = false;
-    GRPC_CLOSURE_SCHED(exec_ctx, bs->next_action.on_complete, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(bs->next_action.on_complete, GRPC_ERROR_NONE);
   } else if (s->byte_stream_error != GRPC_ERROR_NONE) {
-    GRPC_CLOSURE_SCHED(exec_ctx, bs->next_action.on_complete,
+    GRPC_CLOSURE_SCHED(bs->next_action.on_complete,
                        GRPC_ERROR_REF(s->byte_stream_error));
     if (s->data_parser.parsing_frame != nullptr) {
-      incoming_byte_stream_unref(exec_ctx, s->data_parser.parsing_frame);
+      incoming_byte_stream_unref(s->data_parser.parsing_frame);
       s->data_parser.parsing_frame = nullptr;
     }
   } else if (s->read_closed) {
     if (bs->remaining_bytes != 0) {
       s->byte_stream_error =
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Truncated message");
-      GRPC_CLOSURE_SCHED(exec_ctx, bs->next_action.on_complete,
+      GRPC_CLOSURE_SCHED(bs->next_action.on_complete,
                          GRPC_ERROR_REF(s->byte_stream_error));
       if (s->data_parser.parsing_frame != nullptr) {
-        incoming_byte_stream_unref(exec_ctx, s->data_parser.parsing_frame);
+        incoming_byte_stream_unref(s->data_parser.parsing_frame);
         s->data_parser.parsing_frame = nullptr;
       }
     } else {
@@ -2882,11 +2746,10 @@ static void incoming_byte_stream_next_locked(grpc_exec_ctx* exec_ctx,
   } else {
     s->on_next = bs->next_action.on_complete;
   }
-  incoming_byte_stream_unref(exec_ctx, bs);
+  incoming_byte_stream_unref(bs);
 }
 
-static bool incoming_byte_stream_next(grpc_exec_ctx* exec_ctx,
-                                      grpc_byte_stream* byte_stream,
+static bool incoming_byte_stream_next(grpc_byte_stream* byte_stream,
                                       size_t max_size_hint,
                                       grpc_closure* on_complete) {
   GPR_TIMER_BEGIN("incoming_byte_stream_next", 0);
@@ -2901,7 +2764,6 @@ static bool incoming_byte_stream_next(grpc_exec_ctx* exec_ctx,
     bs->next_action.max_size_hint = max_size_hint;
     bs->next_action.on_complete = on_complete;
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_INIT(&bs->next_action.closure,
                           incoming_byte_stream_next_locked, bs,
                           grpc_combiner_scheduler(bs->transport->combiner)),
@@ -2911,8 +2773,7 @@ static bool incoming_byte_stream_next(grpc_exec_ctx* exec_ctx,
   }
 }
 
-static grpc_error* incoming_byte_stream_pull(grpc_exec_ctx* exec_ctx,
-                                             grpc_byte_stream* byte_stream,
+static grpc_error* incoming_byte_stream_pull(grpc_byte_stream* byte_stream,
                                              grpc_slice* slice) {
   GPR_TIMER_BEGIN("incoming_byte_stream_pull", 0);
   grpc_chttp2_incoming_byte_stream* bs =
@@ -2948,31 +2809,28 @@ static grpc_error* incoming_byte_stream_pull(grpc_exec_ctx* exec_ctx,
       }
     }
     error = grpc_deframe_unprocessed_incoming_frames(
-        exec_ctx, &s->data_parser, s, &s->unprocessed_incoming_frames_buffer,
-        slice, nullptr);
+        &s->data_parser, s, &s->unprocessed_incoming_frames_buffer, slice,
+        nullptr);
     if (error != GRPC_ERROR_NONE) {
       return error;
     }
   } else {
     error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Truncated message");
-    GRPC_CLOSURE_SCHED(exec_ctx, &s->reset_byte_stream, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(&s->reset_byte_stream, GRPC_ERROR_REF(error));
     return error;
   }
   GPR_TIMER_END("incoming_byte_stream_pull", 0);
   return GRPC_ERROR_NONE;
 }
 
-static void incoming_byte_stream_destroy_locked(grpc_exec_ctx* exec_ctx,
-                                                void* byte_stream,
+static void incoming_byte_stream_destroy_locked(void* byte_stream,
                                                 grpc_error* error_ignored);
 
-static void incoming_byte_stream_destroy(grpc_exec_ctx* exec_ctx,
-                                         grpc_byte_stream* byte_stream) {
+static void incoming_byte_stream_destroy(grpc_byte_stream* byte_stream) {
   GPR_TIMER_BEGIN("incoming_byte_stream_destroy", 0);
   grpc_chttp2_incoming_byte_stream* bs =
       (grpc_chttp2_incoming_byte_stream*)byte_stream;
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_INIT(&bs->destroy_action,
                         incoming_byte_stream_destroy_locked, bs,
                         grpc_combiner_scheduler(bs->transport->combiner)),
@@ -2981,30 +2839,28 @@ static void incoming_byte_stream_destroy(grpc_exec_ctx* exec_ctx,
 }
 
 static void incoming_byte_stream_publish_error(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_error* error) {
+    grpc_chttp2_incoming_byte_stream* bs, grpc_error* error) {
   grpc_chttp2_stream* s = bs->stream;
 
   GPR_ASSERT(error != GRPC_ERROR_NONE);
-  GRPC_CLOSURE_SCHED(exec_ctx, s->on_next, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_SCHED(s->on_next, GRPC_ERROR_REF(error));
   s->on_next = nullptr;
   GRPC_ERROR_UNREF(s->byte_stream_error);
   s->byte_stream_error = GRPC_ERROR_REF(error);
-  grpc_chttp2_cancel_stream(exec_ctx, bs->transport, bs->stream,
-                            GRPC_ERROR_REF(error));
+  grpc_chttp2_cancel_stream(bs->transport, bs->stream, GRPC_ERROR_REF(error));
 }
 
 grpc_error* grpc_chttp2_incoming_byte_stream_push(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_slice slice, grpc_slice* slice_out) {
+    grpc_chttp2_incoming_byte_stream* bs, grpc_slice slice,
+    grpc_slice* slice_out) {
   grpc_chttp2_stream* s = bs->stream;
 
   if (bs->remaining_bytes < GRPC_SLICE_LENGTH(slice)) {
     grpc_error* error =
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Too many bytes in stream");
 
-    GRPC_CLOSURE_SCHED(exec_ctx, &s->reset_byte_stream, GRPC_ERROR_REF(error));
-    grpc_slice_unref_internal(exec_ctx, slice);
+    GRPC_CLOSURE_SCHED(&s->reset_byte_stream, GRPC_ERROR_REF(error));
+    grpc_slice_unref_internal(slice);
     return error;
   } else {
     bs->remaining_bytes -= (uint32_t)GRPC_SLICE_LENGTH(slice);
@@ -3016,8 +2872,8 @@ grpc_error* grpc_chttp2_incoming_byte_stream_push(
 }
 
 grpc_error* grpc_chttp2_incoming_byte_stream_finished(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_error* error, bool reset_on_error) {
+    grpc_chttp2_incoming_byte_stream* bs, grpc_error* error,
+    bool reset_on_error) {
   grpc_chttp2_stream* s = bs->stream;
 
   if (error == GRPC_ERROR_NONE) {
@@ -3026,27 +2882,25 @@ grpc_error* grpc_chttp2_incoming_byte_stream_finished(
     }
   }
   if (error != GRPC_ERROR_NONE && reset_on_error) {
-    GRPC_CLOSURE_SCHED(exec_ctx, &s->reset_byte_stream, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(&s->reset_byte_stream, GRPC_ERROR_REF(error));
   }
-  incoming_byte_stream_unref(exec_ctx, bs);
+  incoming_byte_stream_unref(bs);
   return error;
 }
 
-static void incoming_byte_stream_shutdown(grpc_exec_ctx* exec_ctx,
-                                          grpc_byte_stream* byte_stream,
+static void incoming_byte_stream_shutdown(grpc_byte_stream* byte_stream,
                                           grpc_error* error) {
   grpc_chttp2_incoming_byte_stream* bs =
       (grpc_chttp2_incoming_byte_stream*)byte_stream;
   GRPC_ERROR_UNREF(grpc_chttp2_incoming_byte_stream_finished(
-      exec_ctx, bs, error, true /* reset_on_error */));
+      bs, error, true /* reset_on_error */));
 }
 
 static const grpc_byte_stream_vtable grpc_chttp2_incoming_byte_stream_vtable = {
     incoming_byte_stream_next, incoming_byte_stream_pull,
     incoming_byte_stream_shutdown, incoming_byte_stream_destroy};
 
-static void incoming_byte_stream_destroy_locked(grpc_exec_ctx* exec_ctx,
-                                                void* byte_stream,
+static void incoming_byte_stream_destroy_locked(void* byte_stream,
                                                 grpc_error* error_ignored) {
   grpc_chttp2_incoming_byte_stream* bs =
       (grpc_chttp2_incoming_byte_stream*)byte_stream;
@@ -3054,15 +2908,15 @@ static void incoming_byte_stream_destroy_locked(grpc_exec_ctx* exec_ctx,
   grpc_chttp2_transport* t = s->t;
 
   GPR_ASSERT(bs->base.vtable == &grpc_chttp2_incoming_byte_stream_vtable);
-  incoming_byte_stream_unref(exec_ctx, bs);
+  incoming_byte_stream_unref(bs);
   s->pending_byte_stream = false;
-  grpc_chttp2_maybe_complete_recv_message(exec_ctx, t, s);
-  grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, t, s);
+  grpc_chttp2_maybe_complete_recv_message(t, s);
+  grpc_chttp2_maybe_complete_recv_trailing_metadata(t, s);
 }
 
 grpc_chttp2_incoming_byte_stream* grpc_chttp2_incoming_byte_stream_create(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t, grpc_chttp2_stream* s,
-    uint32_t frame_size, uint32_t flags) {
+    grpc_chttp2_transport* t, grpc_chttp2_stream* s, uint32_t frame_size,
+    uint32_t flags) {
   grpc_chttp2_incoming_byte_stream* incoming_byte_stream =
       (grpc_chttp2_incoming_byte_stream*)gpr_malloc(
           sizeof(*incoming_byte_stream));
@@ -3082,30 +2936,25 @@ grpc_chttp2_incoming_byte_stream* grpc_chttp2_incoming_byte_stream_create(
  * RESOURCE QUOTAS
  */
 
-static void post_benign_reclaimer(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_transport* t) {
+static void post_benign_reclaimer(grpc_chttp2_transport* t) {
   if (!t->benign_reclaimer_registered) {
     t->benign_reclaimer_registered = true;
     GRPC_CHTTP2_REF_TRANSPORT(t, "benign_reclaimer");
-    grpc_resource_user_post_reclaimer(exec_ctx,
-                                      grpc_endpoint_get_resource_user(t->ep),
+    grpc_resource_user_post_reclaimer(grpc_endpoint_get_resource_user(t->ep),
                                       false, &t->benign_reclaimer_locked);
   }
 }
 
-static void post_destructive_reclaimer(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_transport* t) {
+static void post_destructive_reclaimer(grpc_chttp2_transport* t) {
   if (!t->destructive_reclaimer_registered) {
     t->destructive_reclaimer_registered = true;
     GRPC_CHTTP2_REF_TRANSPORT(t, "destructive_reclaimer");
-    grpc_resource_user_post_reclaimer(exec_ctx,
-                                      grpc_endpoint_get_resource_user(t->ep),
+    grpc_resource_user_post_reclaimer(grpc_endpoint_get_resource_user(t->ep),
                                       true, &t->destructive_reclaimer_locked);
   }
 }
 
-static void benign_reclaimer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                    grpc_error* error) {
+static void benign_reclaimer_locked(void* arg, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
   if (error == GRPC_ERROR_NONE &&
       grpc_chttp2_stream_map_size(&t->stream_map) == 0) {
@@ -3115,7 +2964,7 @@ static void benign_reclaimer_locked(grpc_exec_ctx* exec_ctx, void* arg,
       gpr_log(GPR_DEBUG, "HTTP2: %s - send goaway to free memory",
               t->peer_string);
     }
-    send_goaway(exec_ctx, t,
+    send_goaway(t,
                 grpc_error_set_int(
                     GRPC_ERROR_CREATE_FROM_STATIC_STRING("Buffers full"),
                     GRPC_ERROR_INT_HTTP2_ERROR, GRPC_HTTP2_ENHANCE_YOUR_CALM));
@@ -3128,13 +2977,12 @@ static void benign_reclaimer_locked(grpc_exec_ctx* exec_ctx, void* arg,
   t->benign_reclaimer_registered = false;
   if (error != GRPC_ERROR_CANCELLED) {
     grpc_resource_user_finish_reclamation(
-        exec_ctx, grpc_endpoint_get_resource_user(t->ep));
+        grpc_endpoint_get_resource_user(t->ep));
   }
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "benign_reclaimer");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "benign_reclaimer");
 }
 
-static void destructive_reclaimer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                         grpc_error* error) {
+static void destructive_reclaimer_locked(void* arg, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
   size_t n = grpc_chttp2_stream_map_size(&t->stream_map);
   t->destructive_reclaimer_registered = false;
@@ -3146,7 +2994,7 @@ static void destructive_reclaimer_locked(grpc_exec_ctx* exec_ctx, void* arg,
               s->id);
     }
     grpc_chttp2_cancel_stream(
-        exec_ctx, t, s,
+        t, s,
         grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING("Buffers full"),
                            GRPC_ERROR_INT_HTTP2_ERROR,
                            GRPC_HTTP2_ENHANCE_YOUR_CALM));
@@ -3155,14 +3003,14 @@ static void destructive_reclaimer_locked(grpc_exec_ctx* exec_ctx, void* arg,
          there are more streams left, we can immediately post a new
          reclaimer in case the resource quota needs to free more
          memory */
-      post_destructive_reclaimer(exec_ctx, t);
+      post_destructive_reclaimer(t);
     }
   }
   if (error != GRPC_ERROR_CANCELLED) {
     grpc_resource_user_finish_reclamation(
-        exec_ctx, grpc_endpoint_get_resource_user(t->ep));
+        grpc_endpoint_get_resource_user(t->ep));
   }
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "destructive_reclaimer");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "destructive_reclaimer");
 }
 
 /*******************************************************************************
@@ -3216,8 +3064,7 @@ const char* grpc_chttp2_initiate_write_reason_string(
   GPR_UNREACHABLE_CODE(return "unknown");
 }
 
-static grpc_endpoint* chttp2_get_endpoint(grpc_exec_ctx* exec_ctx,
-                                          grpc_transport* t) {
+static grpc_endpoint* chttp2_get_endpoint(grpc_transport* t) {
   return ((grpc_chttp2_transport*)t)->ep;
 }
 
@@ -3235,17 +3082,16 @@ static const grpc_transport_vtable vtable = {sizeof(grpc_chttp2_stream),
 static const grpc_transport_vtable* get_vtable(void) { return &vtable; }
 
 grpc_transport* grpc_create_chttp2_transport(
-    grpc_exec_ctx* exec_ctx, const grpc_channel_args* channel_args,
-    grpc_endpoint* ep, bool is_client) {
+    const grpc_channel_args* channel_args, grpc_endpoint* ep, bool is_client) {
   grpc_chttp2_transport* t =
       (grpc_chttp2_transport*)gpr_zalloc(sizeof(grpc_chttp2_transport));
-  init_transport(exec_ctx, t, channel_args, ep, is_client);
+  init_transport(t, channel_args, ep, is_client);
   return &t->base;
 }
 
 void grpc_chttp2_transport_start_reading(
-    grpc_exec_ctx* exec_ctx, grpc_transport* transport,
-    grpc_slice_buffer* read_buffer, grpc_closure* notify_on_receive_settings) {
+    grpc_transport* transport, grpc_slice_buffer* read_buffer,
+    grpc_closure* notify_on_receive_settings) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)transport;
   GRPC_CHTTP2_REF_TRANSPORT(
       t, "reading_action"); /* matches unref inside reading_action */
@@ -3254,5 +3100,5 @@ void grpc_chttp2_transport_start_reading(
     gpr_free(read_buffer);
   }
   t->notify_on_receive_settings = notify_on_receive_settings;
-  GRPC_CLOSURE_SCHED(exec_ctx, &t->read_action_locked, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(&t->read_action_locked, GRPC_ERROR_NONE);
 }
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.h b/src/core/ext/transport/chttp2/transport/chttp2_transport.h
index bd72e07bab..596ababb19 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.h
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.h
@@ -28,15 +28,14 @@ extern grpc_core::TraceFlag grpc_trace_http2_stream_state;
 extern grpc_core::DebugOnlyTraceFlag grpc_trace_chttp2_refcount;
 
 grpc_transport* grpc_create_chttp2_transport(
-    grpc_exec_ctx* exec_ctx, const grpc_channel_args* channel_args,
-    grpc_endpoint* ep, bool is_client);
+    const grpc_channel_args* channel_args, grpc_endpoint* ep, bool is_client);
 
 /// Takes ownership of \a read_buffer, which (if non-NULL) contains
 /// leftover bytes previously read from the endpoint (e.g., by handshakers).
 /// If non-null, \a notify_on_receive_settings will be scheduled when
 /// HTTP/2 settings are received from the peer.
 void grpc_chttp2_transport_start_reading(
-    grpc_exec_ctx* exec_ctx, grpc_transport* transport,
-    grpc_slice_buffer* read_buffer, grpc_closure* notify_on_receive_settings);
+    grpc_transport* transport, grpc_slice_buffer* read_buffer,
+    grpc_closure* notify_on_receive_settings);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_CHTTP2_TRANSPORT_H */
diff --git a/src/core/ext/transport/chttp2/transport/flow_control.cc b/src/core/ext/transport/chttp2/transport/flow_control.cc
index 8a057bd9ff..ca48cc7e0a 100644
--- a/src/core/ext/transport/chttp2/transport/flow_control.cc
+++ b/src/core/ext/transport/chttp2/transport/flow_control.cc
@@ -149,8 +149,7 @@ void FlowControlAction::Trace(grpc_chttp2_transport* t) const {
   gpr_free(mf_str);
 }
 
-TransportFlowControl::TransportFlowControl(grpc_exec_ctx* exec_ctx,
-                                           const grpc_chttp2_transport* t,
+TransportFlowControl::TransportFlowControl(const grpc_chttp2_transport* t,
                                            bool enable_bdp_probe)
     : t_(t),
       enable_bdp_probe_(enable_bdp_probe),
@@ -163,7 +162,7 @@ TransportFlowControl::TransportFlowControl(grpc_exec_ctx* exec_ctx,
                           .set_min_control_value(-1)
                           .set_max_control_value(25)
                           .set_integral_range(10)),
-      last_pid_update_(grpc_exec_ctx_now(exec_ctx)) {}
+      last_pid_update_(grpc_core::ExecCtx::Get()->Now()) {}
 
 uint32_t TransportFlowControl::MaybeSendUpdate(bool writing_anyway) {
   FlowControlTrace trace("t updt sent", this, nullptr);
@@ -308,9 +307,8 @@ double TransportFlowControl::TargetLogBdp() {
       1 + log2(bdp_estimator_.EstimateBdp()));
 }
 
-double TransportFlowControl::SmoothLogBdp(grpc_exec_ctx* exec_ctx,
-                                          double value) {
-  grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+double TransportFlowControl::SmoothLogBdp(double value) {
+  grpc_millis now = grpc_core::ExecCtx::Get()->Now();
   double bdp_error = value - pid_controller_.last_control_value();
   const double dt = (double)(now - last_pid_update_) * 1e-3;
   last_pid_update_ = now;
@@ -331,15 +329,14 @@ FlowControlAction::Urgency TransportFlowControl::DeltaUrgency(
   }
 }
 
-FlowControlAction TransportFlowControl::PeriodicUpdate(
-    grpc_exec_ctx* exec_ctx) {
+FlowControlAction TransportFlowControl::PeriodicUpdate() {
   FlowControlAction action;
   if (enable_bdp_probe_) {
     // get bdp estimate and update initial_window accordingly.
     // target might change based on how much memory pressure we are under
     // TODO(ncteisen): experiment with setting target to be huge under low
     // memory pressure.
-    const double target = pow(2, SmoothLogBdp(exec_ctx, TargetLogBdp()));
+    const double target = pow(2, SmoothLogBdp(TargetLogBdp()));
 
     // Though initial window 'could' drop to 0, we keep the floor at 128
     target_initial_window_size_ = (int32_t)GPR_CLAMP(target, 128, INT32_MAX);
diff --git a/src/core/ext/transport/chttp2/transport/flow_control.h b/src/core/ext/transport/chttp2/transport/flow_control.h
index 2515c94309..8306047dbc 100644
--- a/src/core/ext/transport/chttp2/transport/flow_control.h
+++ b/src/core/ext/transport/chttp2/transport/flow_control.h
@@ -134,8 +134,7 @@ class FlowControlTrace {
 
 class TransportFlowControl {
  public:
-  TransportFlowControl(grpc_exec_ctx* exec_ctx, const grpc_chttp2_transport* t,
-                       bool enable_bdp_probe);
+  TransportFlowControl(const grpc_chttp2_transport* t, bool enable_bdp_probe);
   ~TransportFlowControl() {}
 
   bool bdp_probe() const { return enable_bdp_probe_; }
@@ -153,7 +152,7 @@ class TransportFlowControl {
   // Call periodically (at a low-ish rate, 100ms - 10s makes sense)
   // to perform more complex flow control calculations and return an action
   // to let chttp2 change its parameters
-  FlowControlAction PeriodicUpdate(grpc_exec_ctx* exec_ctx);
+  FlowControlAction PeriodicUpdate();
 
   void StreamSentData(int64_t size) { remote_window_ -= size; }
 
@@ -212,7 +211,7 @@ class TransportFlowControl {
  private:
   friend class ::grpc::testing::TrickledCHTTP2;
   double TargetLogBdp();
-  double SmoothLogBdp(grpc_exec_ctx* exec_ctx, double value);
+  double SmoothLogBdp(double value);
   FlowControlAction::Urgency DeltaUrgency(int32_t value,
                                           grpc_chttp2_setting_id setting_id);
 
diff --git a/src/core/ext/transport/chttp2/transport/frame_data.cc b/src/core/ext/transport/chttp2/transport/frame_data.cc
index f0c3b55792..9b3a6acc9e 100644
--- a/src/core/ext/transport/chttp2/transport/frame_data.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_data.cc
@@ -36,11 +36,10 @@ grpc_error* grpc_chttp2_data_parser_init(grpc_chttp2_data_parser* parser) {
   return GRPC_ERROR_NONE;
 }
 
-void grpc_chttp2_data_parser_destroy(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_data_parser* parser) {
+void grpc_chttp2_data_parser_destroy(grpc_chttp2_data_parser* parser) {
   if (parser->parsing_frame != nullptr) {
     GRPC_ERROR_UNREF(grpc_chttp2_incoming_byte_stream_finished(
-        exec_ctx, parser->parsing_frame,
+        parser->parsing_frame,
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Parser destroyed"), false));
   }
   GRPC_ERROR_UNREF(parser->error);
@@ -98,7 +97,7 @@ void grpc_chttp2_encode_data(uint32_t id, grpc_slice_buffer* inbuf,
 }
 
 grpc_error* grpc_deframe_unprocessed_incoming_frames(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_data_parser* p, grpc_chttp2_stream* s,
+    grpc_chttp2_data_parser* p, grpc_chttp2_stream* s,
     grpc_slice_buffer* slices, grpc_slice* slice_out,
     grpc_byte_stream** stream_out) {
   grpc_error* error = GRPC_ERROR_NONE;
@@ -118,14 +117,14 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
     char* msg;
 
     if (cur == end) {
-      grpc_slice_unref_internal(exec_ctx, slice);
+      grpc_slice_unref_internal(slice);
       continue;
     }
 
     switch (p->state) {
       case GRPC_CHTTP2_DATA_ERROR:
         p->state = GRPC_CHTTP2_DATA_ERROR;
-        grpc_slice_unref_internal(exec_ctx, slice);
+        grpc_slice_unref_internal(slice);
         return GRPC_ERROR_REF(p->error);
       case GRPC_CHTTP2_DATA_FH_0:
         s->stats.incoming.framing_bytes++;
@@ -150,12 +149,12 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
             p->error =
                 grpc_error_set_int(p->error, GRPC_ERROR_INT_OFFSET, cur - beg);
             p->state = GRPC_CHTTP2_DATA_ERROR;
-            grpc_slice_unref_internal(exec_ctx, slice);
+            grpc_slice_unref_internal(slice);
             return GRPC_ERROR_REF(p->error);
         }
         if (++cur == end) {
           p->state = GRPC_CHTTP2_DATA_FH_1;
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           continue;
         }
       /* fallthrough */
@@ -164,7 +163,7 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
         p->frame_size = ((uint32_t)*cur) << 24;
         if (++cur == end) {
           p->state = GRPC_CHTTP2_DATA_FH_2;
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           continue;
         }
       /* fallthrough */
@@ -173,7 +172,7 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
         p->frame_size |= ((uint32_t)*cur) << 16;
         if (++cur == end) {
           p->state = GRPC_CHTTP2_DATA_FH_3;
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           continue;
         }
       /* fallthrough */
@@ -182,7 +181,7 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
         p->frame_size |= ((uint32_t)*cur) << 8;
         if (++cur == end) {
           p->state = GRPC_CHTTP2_DATA_FH_4;
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           continue;
         }
       /* fallthrough */
@@ -198,11 +197,11 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
           message_flags |= GRPC_WRITE_INTERNAL_COMPRESS;
         }
         p->parsing_frame = grpc_chttp2_incoming_byte_stream_create(
-            exec_ctx, t, s, p->frame_size, message_flags);
+            t, s, p->frame_size, message_flags);
         *stream_out = &p->parsing_frame->base;
         if (p->parsing_frame->remaining_bytes == 0) {
           GRPC_ERROR_UNREF(grpc_chttp2_incoming_byte_stream_finished(
-              exec_ctx, p->parsing_frame, GRPC_ERROR_NONE, true));
+              p->parsing_frame, GRPC_ERROR_NONE, true));
           p->parsing_frame = nullptr;
           p->state = GRPC_CHTTP2_DATA_FH_0;
         }
@@ -213,64 +212,64 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
               slices,
               grpc_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
         }
-        grpc_slice_unref_internal(exec_ctx, slice);
+        grpc_slice_unref_internal(slice);
         return GRPC_ERROR_NONE;
       case GRPC_CHTTP2_DATA_FRAME: {
         GPR_ASSERT(p->parsing_frame != nullptr);
         GPR_ASSERT(slice_out != nullptr);
         if (cur == end) {
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           continue;
         }
         uint32_t remaining = (uint32_t)(end - cur);
         if (remaining == p->frame_size) {
           s->stats.incoming.data_bytes += remaining;
           if (GRPC_ERROR_NONE != (error = grpc_chttp2_incoming_byte_stream_push(
-                                      exec_ctx, p->parsing_frame,
+                                      p->parsing_frame,
                                       grpc_slice_sub(slice, (size_t)(cur - beg),
                                                      (size_t)(end - beg)),
                                       slice_out))) {
-            grpc_slice_unref_internal(exec_ctx, slice);
+            grpc_slice_unref_internal(slice);
             return error;
           }
           if (GRPC_ERROR_NONE !=
               (error = grpc_chttp2_incoming_byte_stream_finished(
-                   exec_ctx, p->parsing_frame, GRPC_ERROR_NONE, true))) {
-            grpc_slice_unref_internal(exec_ctx, slice);
+                   p->parsing_frame, GRPC_ERROR_NONE, true))) {
+            grpc_slice_unref_internal(slice);
             return error;
           }
           p->parsing_frame = nullptr;
           p->state = GRPC_CHTTP2_DATA_FH_0;
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           return GRPC_ERROR_NONE;
         } else if (remaining < p->frame_size) {
           s->stats.incoming.data_bytes += remaining;
           if (GRPC_ERROR_NONE != (error = grpc_chttp2_incoming_byte_stream_push(
-                                      exec_ctx, p->parsing_frame,
+                                      p->parsing_frame,
                                       grpc_slice_sub(slice, (size_t)(cur - beg),
                                                      (size_t)(end - beg)),
                                       slice_out))) {
             return error;
           }
           p->frame_size -= remaining;
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           return GRPC_ERROR_NONE;
         } else {
           GPR_ASSERT(remaining > p->frame_size);
           s->stats.incoming.data_bytes += p->frame_size;
           if (GRPC_ERROR_NONE !=
               (grpc_chttp2_incoming_byte_stream_push(
-                  exec_ctx, p->parsing_frame,
+                  p->parsing_frame,
                   grpc_slice_sub(slice, (size_t)(cur - beg),
                                  (size_t)(cur + p->frame_size - beg)),
                   slice_out))) {
-            grpc_slice_unref_internal(exec_ctx, slice);
+            grpc_slice_unref_internal(slice);
             return error;
           }
           if (GRPC_ERROR_NONE !=
               (error = grpc_chttp2_incoming_byte_stream_finished(
-                   exec_ctx, p->parsing_frame, GRPC_ERROR_NONE, true))) {
-            grpc_slice_unref_internal(exec_ctx, slice);
+                   p->parsing_frame, GRPC_ERROR_NONE, true))) {
+            grpc_slice_unref_internal(slice);
             return error;
           }
           p->parsing_frame = nullptr;
@@ -279,7 +278,7 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
           grpc_slice_buffer_undo_take_first(
               slices,
               grpc_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           return GRPC_ERROR_NONE;
         }
       }
@@ -289,19 +288,19 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_chttp2_data_parser_parse(grpc_exec_ctx* exec_ctx, void* parser,
+grpc_error* grpc_chttp2_data_parser_parse(void* parser,
                                           grpc_chttp2_transport* t,
                                           grpc_chttp2_stream* s,
                                           grpc_slice slice, int is_last) {
   if (!s->pending_byte_stream) {
     grpc_slice_ref_internal(slice);
     grpc_slice_buffer_add(&s->frame_storage, slice);
-    grpc_chttp2_maybe_complete_recv_message(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_message(t, s);
   } else if (s->on_next) {
     GPR_ASSERT(s->frame_storage.length == 0);
     grpc_slice_ref_internal(slice);
     grpc_slice_buffer_add(&s->unprocessed_incoming_frames_buffer, slice);
-    GRPC_CLOSURE_SCHED(exec_ctx, s->on_next, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(s->on_next, GRPC_ERROR_NONE);
     s->on_next = nullptr;
     s->unprocessed_incoming_frames_decompressed = false;
   } else {
@@ -310,8 +309,7 @@ grpc_error* grpc_chttp2_data_parser_parse(grpc_exec_ctx* exec_ctx, void* parser,
   }
 
   if (is_last && s->received_last_frame) {
-    grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, false,
-                                   GRPC_ERROR_NONE);
+    grpc_chttp2_mark_stream_closed(t, s, true, false, GRPC_ERROR_NONE);
   }
 
   return GRPC_ERROR_NONE;
diff --git a/src/core/ext/transport/chttp2/transport/frame_data.h b/src/core/ext/transport/chttp2/transport/frame_data.h
index 4de553ea42..964cc59b1b 100644
--- a/src/core/ext/transport/chttp2/transport/frame_data.h
+++ b/src/core/ext/transport/chttp2/transport/frame_data.h
@@ -54,8 +54,7 @@ typedef struct {
 /* initialize per-stream state for data frame parsing */
 grpc_error* grpc_chttp2_data_parser_init(grpc_chttp2_data_parser* parser);
 
-void grpc_chttp2_data_parser_destroy(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_data_parser* parser);
+void grpc_chttp2_data_parser_destroy(grpc_chttp2_data_parser* parser);
 
 /* start processing a new data frame */
 grpc_error* grpc_chttp2_data_parser_begin_frame(grpc_chttp2_data_parser* parser,
@@ -65,7 +64,7 @@ grpc_error* grpc_chttp2_data_parser_begin_frame(grpc_chttp2_data_parser* parser,
 
 /* handle a slice of a data frame - is_last indicates the last slice of a
    frame */
-grpc_error* grpc_chttp2_data_parser_parse(grpc_exec_ctx* exec_ctx, void* parser,
+grpc_error* grpc_chttp2_data_parser_parse(void* parser,
                                           grpc_chttp2_transport* t,
                                           grpc_chttp2_stream* s,
                                           grpc_slice slice, int is_last);
@@ -76,7 +75,7 @@ void grpc_chttp2_encode_data(uint32_t id, grpc_slice_buffer* inbuf,
                              grpc_slice_buffer* outbuf);
 
 grpc_error* grpc_deframe_unprocessed_incoming_frames(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_data_parser* p, grpc_chttp2_stream* s,
+    grpc_chttp2_data_parser* p, grpc_chttp2_stream* s,
     grpc_slice_buffer* slices, grpc_slice* slice_out,
     grpc_byte_stream** stream_out);
 
diff --git a/src/core/ext/transport/chttp2/transport/frame_goaway.cc b/src/core/ext/transport/chttp2/transport/frame_goaway.cc
index a2ce709a2e..b60b4227fe 100644
--- a/src/core/ext/transport/chttp2/transport/frame_goaway.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_goaway.cc
@@ -52,8 +52,7 @@ grpc_error* grpc_chttp2_goaway_parser_begin_frame(grpc_chttp2_goaway_parser* p,
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_chttp2_goaway_parser_parse(grpc_exec_ctx* exec_ctx,
-                                            void* parser,
+grpc_error* grpc_chttp2_goaway_parser_parse(void* parser,
                                             grpc_chttp2_transport* t,
                                             grpc_chttp2_stream* s,
                                             grpc_slice slice, int is_last) {
@@ -135,7 +134,7 @@ grpc_error* grpc_chttp2_goaway_parser_parse(grpc_exec_ctx* exec_ctx,
       p->state = GRPC_CHTTP2_GOAWAY_DEBUG;
       if (is_last) {
         grpc_chttp2_add_incoming_goaway(
-            exec_ctx, t, (uint32_t)p->error_code,
+            t, (uint32_t)p->error_code,
             grpc_slice_new(p->debug_data, p->debug_length, gpr_free));
         p->debug_data = nullptr;
       }
diff --git a/src/core/ext/transport/chttp2/transport/frame_goaway.h b/src/core/ext/transport/chttp2/transport/frame_goaway.h
index 743e763342..064d39ac59 100644
--- a/src/core/ext/transport/chttp2/transport/frame_goaway.h
+++ b/src/core/ext/transport/chttp2/transport/frame_goaway.h
@@ -50,8 +50,7 @@ void grpc_chttp2_goaway_parser_init(grpc_chttp2_goaway_parser* p);
 void grpc_chttp2_goaway_parser_destroy(grpc_chttp2_goaway_parser* p);
 grpc_error* grpc_chttp2_goaway_parser_begin_frame(
     grpc_chttp2_goaway_parser* parser, uint32_t length, uint8_t flags);
-grpc_error* grpc_chttp2_goaway_parser_parse(grpc_exec_ctx* exec_ctx,
-                                            void* parser,
+grpc_error* grpc_chttp2_goaway_parser_parse(void* parser,
                                             grpc_chttp2_transport* t,
                                             grpc_chttp2_stream* s,
                                             grpc_slice slice, int is_last);
diff --git a/src/core/ext/transport/chttp2/transport/frame_ping.cc b/src/core/ext/transport/chttp2/transport/frame_ping.cc
index d0feb51922..298a56721a 100644
--- a/src/core/ext/transport/chttp2/transport/frame_ping.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_ping.cc
@@ -68,7 +68,7 @@ grpc_error* grpc_chttp2_ping_parser_begin_frame(grpc_chttp2_ping_parser* parser,
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_chttp2_ping_parser_parse(grpc_exec_ctx* exec_ctx, void* parser,
+grpc_error* grpc_chttp2_ping_parser_parse(void* parser,
                                           grpc_chttp2_transport* t,
                                           grpc_chttp2_stream* s,
                                           grpc_slice slice, int is_last) {
@@ -86,10 +86,10 @@ grpc_error* grpc_chttp2_ping_parser_parse(grpc_exec_ctx* exec_ctx, void* parser,
   if (p->byte == 8) {
     GPR_ASSERT(is_last);
     if (p->is_ack) {
-      grpc_chttp2_ack_ping(exec_ctx, t, p->opaque_8bytes);
+      grpc_chttp2_ack_ping(t, p->opaque_8bytes);
     } else {
       if (!t->is_client) {
-        grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+        grpc_millis now = grpc_core::ExecCtx::Get()->Now();
         grpc_millis next_allowed_ping =
             t->ping_recv_state.last_ping_recv_time +
             t->ping_policy.min_recv_ping_interval_without_data;
@@ -104,7 +104,7 @@ grpc_error* grpc_chttp2_ping_parser_parse(grpc_exec_ctx* exec_ctx, void* parser,
         }
 
         if (next_allowed_ping > now) {
-          grpc_chttp2_add_ping_strike(exec_ctx, t);
+          grpc_chttp2_add_ping_strike(t);
         }
 
         t->ping_recv_state.last_ping_recv_time = now;
@@ -116,8 +116,7 @@ grpc_error* grpc_chttp2_ping_parser_parse(grpc_exec_ctx* exec_ctx, void* parser,
               t->ping_acks, t->ping_ack_capacity * sizeof(*t->ping_acks));
         }
         t->ping_acks[t->ping_ack_count++] = p->opaque_8bytes;
-        grpc_chttp2_initiate_write(exec_ctx, t,
-                                   GRPC_CHTTP2_INITIATE_WRITE_PING_RESPONSE);
+        grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_PING_RESPONSE);
       }
     }
   }
diff --git a/src/core/ext/transport/chttp2/transport/frame_ping.h b/src/core/ext/transport/chttp2/transport/frame_ping.h
index 76ca397709..75bacfb1d4 100644
--- a/src/core/ext/transport/chttp2/transport/frame_ping.h
+++ b/src/core/ext/transport/chttp2/transport/frame_ping.h
@@ -33,7 +33,7 @@ grpc_slice grpc_chttp2_ping_create(uint8_t ack, uint64_t opaque_8bytes);
 
 grpc_error* grpc_chttp2_ping_parser_begin_frame(grpc_chttp2_ping_parser* parser,
                                                 uint32_t length, uint8_t flags);
-grpc_error* grpc_chttp2_ping_parser_parse(grpc_exec_ctx* exec_ctx, void* parser,
+grpc_error* grpc_chttp2_ping_parser_parse(void* parser,
                                           grpc_chttp2_transport* t,
                                           grpc_chttp2_stream* s,
                                           grpc_slice slice, int is_last);
diff --git a/src/core/ext/transport/chttp2/transport/frame_rst_stream.cc b/src/core/ext/transport/chttp2/transport/frame_rst_stream.cc
index 05a7f056a4..fee576678d 100644
--- a/src/core/ext/transport/chttp2/transport/frame_rst_stream.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_rst_stream.cc
@@ -69,8 +69,7 @@ grpc_error* grpc_chttp2_rst_stream_parser_begin_frame(
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_chttp2_rst_stream_parser_parse(grpc_exec_ctx* exec_ctx,
-                                                void* parser,
+grpc_error* grpc_chttp2_rst_stream_parser_parse(void* parser,
                                                 grpc_chttp2_transport* t,
                                                 grpc_chttp2_stream* s,
                                                 grpc_slice slice, int is_last) {
@@ -103,7 +102,7 @@ grpc_error* grpc_chttp2_rst_stream_parser_parse(grpc_exec_ctx* exec_ctx,
           GRPC_ERROR_INT_HTTP2_ERROR, (intptr_t)reason);
       gpr_free(message);
     }
-    grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, true, error);
+    grpc_chttp2_mark_stream_closed(t, s, true, true, error);
   }
 
   return GRPC_ERROR_NONE;
diff --git a/src/core/ext/transport/chttp2/transport/frame_rst_stream.h b/src/core/ext/transport/chttp2/transport/frame_rst_stream.h
index 7dfc5d4578..e76a3ca841 100644
--- a/src/core/ext/transport/chttp2/transport/frame_rst_stream.h
+++ b/src/core/ext/transport/chttp2/transport/frame_rst_stream.h
@@ -34,8 +34,7 @@ grpc_slice grpc_chttp2_rst_stream_create(uint32_t stream_id, uint32_t code,
 
 grpc_error* grpc_chttp2_rst_stream_parser_begin_frame(
     grpc_chttp2_rst_stream_parser* parser, uint32_t length, uint8_t flags);
-grpc_error* grpc_chttp2_rst_stream_parser_parse(grpc_exec_ctx* exec_ctx,
-                                                void* parser,
+grpc_error* grpc_chttp2_rst_stream_parser_parse(void* parser,
                                                 grpc_chttp2_transport* t,
                                                 grpc_chttp2_stream* s,
                                                 grpc_slice slice, int is_last);
diff --git a/src/core/ext/transport/chttp2/transport/frame_settings.cc b/src/core/ext/transport/chttp2/transport/frame_settings.cc
index de4340fea5..c6c2a6c301 100644
--- a/src/core/ext/transport/chttp2/transport/frame_settings.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_settings.cc
@@ -108,8 +108,7 @@ grpc_error* grpc_chttp2_settings_parser_begin_frame(
   }
 }
 
-grpc_error* grpc_chttp2_settings_parser_parse(grpc_exec_ctx* exec_ctx, void* p,
-                                              grpc_chttp2_transport* t,
+grpc_error* grpc_chttp2_settings_parser_parse(void* p, grpc_chttp2_transport* t,
                                               grpc_chttp2_stream* s,
                                               grpc_slice slice, int is_last) {
   grpc_chttp2_settings_parser* parser = (grpc_chttp2_settings_parser*)p;
@@ -132,7 +131,7 @@ grpc_error* grpc_chttp2_settings_parser_parse(grpc_exec_ctx* exec_ctx, void* p,
                    GRPC_CHTTP2_NUM_SETTINGS * sizeof(uint32_t));
             grpc_slice_buffer_add(&t->qbuf, grpc_chttp2_settings_ack_create());
             if (t->notify_on_receive_settings != nullptr) {
-              GRPC_CLOSURE_SCHED(exec_ctx, t->notify_on_receive_settings,
+              GRPC_CLOSURE_SCHED(t->notify_on_receive_settings,
                                  GRPC_ERROR_NONE);
               t->notify_on_receive_settings = nullptr;
             }
diff --git a/src/core/ext/transport/chttp2/transport/frame_settings.h b/src/core/ext/transport/chttp2/transport/frame_settings.h
index 36e2ca83a0..ce65402815 100644
--- a/src/core/ext/transport/chttp2/transport/frame_settings.h
+++ b/src/core/ext/transport/chttp2/transport/frame_settings.h
@@ -52,8 +52,7 @@ grpc_slice grpc_chttp2_settings_ack_create(void);
 grpc_error* grpc_chttp2_settings_parser_begin_frame(
     grpc_chttp2_settings_parser* parser, uint32_t length, uint8_t flags,
     uint32_t* settings);
-grpc_error* grpc_chttp2_settings_parser_parse(grpc_exec_ctx* exec_ctx,
-                                              void* parser,
+grpc_error* grpc_chttp2_settings_parser_parse(void* parser,
                                               grpc_chttp2_transport* t,
                                               grpc_chttp2_stream* s,
                                               grpc_slice slice, int is_last);
diff --git a/src/core/ext/transport/chttp2/transport/frame_window_update.cc b/src/core/ext/transport/chttp2/transport/frame_window_update.cc
index 08407a8e67..418ca144ce 100644
--- a/src/core/ext/transport/chttp2/transport/frame_window_update.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_window_update.cc
@@ -64,9 +64,11 @@ grpc_error* grpc_chttp2_window_update_parser_begin_frame(
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_chttp2_window_update_parser_parse(
-    grpc_exec_ctx* exec_ctx, void* parser, grpc_chttp2_transport* t,
-    grpc_chttp2_stream* s, grpc_slice slice, int is_last) {
+grpc_error* grpc_chttp2_window_update_parser_parse(void* parser,
+                                                   grpc_chttp2_transport* t,
+                                                   grpc_chttp2_stream* s,
+                                                   grpc_slice slice,
+                                                   int is_last) {
   uint8_t* const beg = GRPC_SLICE_START_PTR(slice);
   uint8_t* const end = GRPC_SLICE_END_PTR(slice);
   uint8_t* cur = beg;
@@ -98,10 +100,9 @@ grpc_error* grpc_chttp2_window_update_parser_parse(
       if (s != nullptr) {
         s->flow_control->RecvUpdate(received_update);
         if (grpc_chttp2_list_remove_stalled_by_stream(t, s)) {
-          grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+          grpc_chttp2_mark_stream_writable(t, s);
           grpc_chttp2_initiate_write(
-              exec_ctx, t,
-              GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_UPDATE);
+              t, GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_UPDATE);
         }
       }
     } else {
@@ -110,8 +111,7 @@ grpc_error* grpc_chttp2_window_update_parser_parse(
       bool is_zero = t->flow_control->remote_window() <= 0;
       if (was_zero && !is_zero) {
         grpc_chttp2_initiate_write(
-            exec_ctx, t,
-            GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL_UNSTALLED);
+            t, GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL_UNSTALLED);
       }
     }
   }
diff --git a/src/core/ext/transport/chttp2/transport/frame_window_update.h b/src/core/ext/transport/chttp2/transport/frame_window_update.h
index e031b585fa..a32f1a9d11 100644
--- a/src/core/ext/transport/chttp2/transport/frame_window_update.h
+++ b/src/core/ext/transport/chttp2/transport/frame_window_update.h
@@ -35,8 +35,10 @@ grpc_slice grpc_chttp2_window_update_create(
 
 grpc_error* grpc_chttp2_window_update_parser_begin_frame(
     grpc_chttp2_window_update_parser* parser, uint32_t length, uint8_t flags);
-grpc_error* grpc_chttp2_window_update_parser_parse(
-    grpc_exec_ctx* exec_ctx, void* parser, grpc_chttp2_transport* t,
-    grpc_chttp2_stream* s, grpc_slice slice, int is_last);
+grpc_error* grpc_chttp2_window_update_parser_parse(void* parser,
+                                                   grpc_chttp2_transport* t,
+                                                   grpc_chttp2_stream* s,
+                                                   grpc_slice slice,
+                                                   int is_last);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_WINDOW_UPDATE_H */
diff --git a/src/core/ext/transport/chttp2/transport/hpack_encoder.cc b/src/core/ext/transport/chttp2/transport/hpack_encoder.cc
index e76d92e31d..3a5692a694 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_encoder.cc
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.cc
@@ -206,14 +206,12 @@ static uint32_t prepare_space_for_new_elem(grpc_chttp2_hpack_compressor* c,
 }
 
 /* dummy function */
-static void add_nothing(grpc_exec_ctx* exec_ctx,
-                        grpc_chttp2_hpack_compressor* c, grpc_mdelem elem,
+static void add_nothing(grpc_chttp2_hpack_compressor* c, grpc_mdelem elem,
                         size_t elem_size) {}
 
 // Add a key to the dynamic table. Both key and value will be added to table at
 // the decoder.
-static void add_key_with_index(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_compressor* c,
+static void add_key_with_index(grpc_chttp2_hpack_compressor* c,
                                grpc_mdelem elem, uint32_t new_index) {
   if (new_index == 0) {
     return;
@@ -240,14 +238,12 @@ static void add_key_with_index(grpc_exec_ctx* exec_ctx,
     c->indices_keys[HASH_FRAGMENT_3(key_hash)] = new_index;
   } else if (c->indices_keys[HASH_FRAGMENT_2(key_hash)] <
              c->indices_keys[HASH_FRAGMENT_3(key_hash)]) {
-    grpc_slice_unref_internal(exec_ctx,
-                              c->entries_keys[HASH_FRAGMENT_2(key_hash)]);
+    grpc_slice_unref_internal(c->entries_keys[HASH_FRAGMENT_2(key_hash)]);
     c->entries_keys[HASH_FRAGMENT_2(key_hash)] =
         grpc_slice_ref_internal(GRPC_MDKEY(elem));
     c->indices_keys[HASH_FRAGMENT_2(key_hash)] = new_index;
   } else {
-    grpc_slice_unref_internal(exec_ctx,
-                              c->entries_keys[HASH_FRAGMENT_3(key_hash)]);
+    grpc_slice_unref_internal(c->entries_keys[HASH_FRAGMENT_3(key_hash)]);
     c->entries_keys[HASH_FRAGMENT_3(key_hash)] =
         grpc_slice_ref_internal(GRPC_MDKEY(elem));
     c->indices_keys[HASH_FRAGMENT_3(key_hash)] = new_index;
@@ -255,8 +251,7 @@ static void add_key_with_index(grpc_exec_ctx* exec_ctx,
 }
 
 /* add an element to the decoder table */
-static void add_elem_with_index(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_compressor* c,
+static void add_elem_with_index(grpc_chttp2_hpack_compressor* c,
                                 grpc_mdelem elem, uint32_t new_index) {
   if (new_index == 0) {
     return;
@@ -286,35 +281,34 @@ static void add_elem_with_index(grpc_exec_ctx* exec_ctx,
   } else if (c->indices_elems[HASH_FRAGMENT_2(elem_hash)] <
              c->indices_elems[HASH_FRAGMENT_3(elem_hash)]) {
     /* not there: replace oldest */
-    GRPC_MDELEM_UNREF(exec_ctx, c->entries_elems[HASH_FRAGMENT_2(elem_hash)]);
+    GRPC_MDELEM_UNREF(c->entries_elems[HASH_FRAGMENT_2(elem_hash)]);
     c->entries_elems[HASH_FRAGMENT_2(elem_hash)] = GRPC_MDELEM_REF(elem);
     c->indices_elems[HASH_FRAGMENT_2(elem_hash)] = new_index;
   } else {
     /* not there: replace oldest */
-    GRPC_MDELEM_UNREF(exec_ctx, c->entries_elems[HASH_FRAGMENT_3(elem_hash)]);
+    GRPC_MDELEM_UNREF(c->entries_elems[HASH_FRAGMENT_3(elem_hash)]);
     c->entries_elems[HASH_FRAGMENT_3(elem_hash)] = GRPC_MDELEM_REF(elem);
     c->indices_elems[HASH_FRAGMENT_3(elem_hash)] = new_index;
   }
 
-  add_key_with_index(exec_ctx, c, elem, new_index);
+  add_key_with_index(c, elem, new_index);
 }
 
-static void add_elem(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_compressor* c,
-                     grpc_mdelem elem, size_t elem_size) {
+static void add_elem(grpc_chttp2_hpack_compressor* c, grpc_mdelem elem,
+                     size_t elem_size) {
   uint32_t new_index = prepare_space_for_new_elem(c, elem_size);
-  add_elem_with_index(exec_ctx, c, elem, new_index);
+  add_elem_with_index(c, elem, new_index);
 }
 
-static void add_key(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_compressor* c,
-                    grpc_mdelem elem, size_t elem_size) {
+static void add_key(grpc_chttp2_hpack_compressor* c, grpc_mdelem elem,
+                    size_t elem_size) {
   uint32_t new_index = prepare_space_for_new_elem(c, elem_size);
-  add_key_with_index(exec_ctx, c, elem, new_index);
+  add_key_with_index(c, elem, new_index);
 }
 
-static void emit_indexed(grpc_exec_ctx* exec_ctx,
-                         grpc_chttp2_hpack_compressor* c, uint32_t elem_index,
+static void emit_indexed(grpc_chttp2_hpack_compressor* c, uint32_t elem_index,
                          framer_state* st) {
-  GRPC_STATS_INC_HPACK_SEND_INDEXED(exec_ctx);
+  GRPC_STATS_INC_HPACK_SEND_INDEXED();
   uint32_t len = GRPC_CHTTP2_VARINT_LENGTH(elem_index, 1);
   GRPC_CHTTP2_WRITE_VARINT(elem_index, 1, 0x80, add_tiny_header_data(st, len),
                            len);
@@ -326,18 +320,17 @@ typedef struct {
   bool insert_null_before_wire_value;
 } wire_value;
 
-static wire_value get_wire_value(grpc_exec_ctx* exec_ctx, grpc_mdelem elem,
-                                 bool true_binary_enabled) {
+static wire_value get_wire_value(grpc_mdelem elem, bool true_binary_enabled) {
   wire_value wire_val;
   if (grpc_is_binary_header(GRPC_MDKEY(elem))) {
     if (true_binary_enabled) {
-      GRPC_STATS_INC_HPACK_SEND_BINARY(exec_ctx);
+      GRPC_STATS_INC_HPACK_SEND_BINARY();
       wire_val.huffman_prefix = 0x00;
       wire_val.insert_null_before_wire_value = true;
       wire_val.data = grpc_slice_ref_internal(GRPC_MDVALUE(elem));
 
     } else {
-      GRPC_STATS_INC_HPACK_SEND_BINARY_BASE64(exec_ctx);
+      GRPC_STATS_INC_HPACK_SEND_BINARY_BASE64();
       wire_val.huffman_prefix = 0x80;
       wire_val.insert_null_before_wire_value = false;
       wire_val.data =
@@ -345,7 +338,7 @@ static wire_value get_wire_value(grpc_exec_ctx* exec_ctx, grpc_mdelem elem,
     }
   } else {
     /* TODO(ctiller): opportunistically compress non-binary headers */
-    GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED(exec_ctx);
+    GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED();
     wire_val.huffman_prefix = 0x00;
     wire_val.insert_null_before_wire_value = false;
     wire_val.data = grpc_slice_ref_internal(GRPC_MDVALUE(elem));
@@ -362,14 +355,12 @@ static void add_wire_value(framer_state* st, wire_value v) {
   add_header_data(st, v.data);
 }
 
-static void emit_lithdr_incidx(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_compressor* c,
+static void emit_lithdr_incidx(grpc_chttp2_hpack_compressor* c,
                                uint32_t key_index, grpc_mdelem elem,
                                framer_state* st) {
-  GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX(exec_ctx);
+  GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX();
   uint32_t len_pfx = GRPC_CHTTP2_VARINT_LENGTH(key_index, 2);
-  wire_value value =
-      get_wire_value(exec_ctx, elem, st->use_true_binary_metadata);
+  wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
   size_t len_val = wire_value_length(value);
   uint32_t len_val_len;
   GPR_ASSERT(len_val <= UINT32_MAX);
@@ -381,14 +372,12 @@ static void emit_lithdr_incidx(grpc_exec_ctx* exec_ctx,
   add_wire_value(st, value);
 }
 
-static void emit_lithdr_noidx(grpc_exec_ctx* exec_ctx,
-                              grpc_chttp2_hpack_compressor* c,
+static void emit_lithdr_noidx(grpc_chttp2_hpack_compressor* c,
                               uint32_t key_index, grpc_mdelem elem,
                               framer_state* st) {
-  GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX(exec_ctx);
+  GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX();
   uint32_t len_pfx = GRPC_CHTTP2_VARINT_LENGTH(key_index, 4);
-  wire_value value =
-      get_wire_value(exec_ctx, elem, st->use_true_binary_metadata);
+  wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
   size_t len_val = wire_value_length(value);
   uint32_t len_val_len;
   GPR_ASSERT(len_val <= UINT32_MAX);
@@ -400,16 +389,14 @@ static void emit_lithdr_noidx(grpc_exec_ctx* exec_ctx,
   add_wire_value(st, value);
 }
 
-static void emit_lithdr_incidx_v(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_hpack_compressor* c,
+static void emit_lithdr_incidx_v(grpc_chttp2_hpack_compressor* c,
                                  uint32_t unused_index, grpc_mdelem elem,
                                  framer_state* st) {
   GPR_ASSERT(unused_index == 0);
-  GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX_V(exec_ctx);
-  GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED(exec_ctx);
+  GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX_V();
+  GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED();
   uint32_t len_key = (uint32_t)GRPC_SLICE_LENGTH(GRPC_MDKEY(elem));
-  wire_value value =
-      get_wire_value(exec_ctx, elem, st->use_true_binary_metadata);
+  wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
   uint32_t len_val = (uint32_t)wire_value_length(value);
   uint32_t len_key_len = GRPC_CHTTP2_VARINT_LENGTH(len_key, 1);
   uint32_t len_val_len = GRPC_CHTTP2_VARINT_LENGTH(len_val, 1);
@@ -424,16 +411,14 @@ static void emit_lithdr_incidx_v(grpc_exec_ctx* exec_ctx,
   add_wire_value(st, value);
 }
 
-static void emit_lithdr_noidx_v(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_compressor* c,
+static void emit_lithdr_noidx_v(grpc_chttp2_hpack_compressor* c,
                                 uint32_t unused_index, grpc_mdelem elem,
                                 framer_state* st) {
   GPR_ASSERT(unused_index == 0);
-  GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX_V(exec_ctx);
-  GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED(exec_ctx);
+  GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX_V();
+  GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED();
   uint32_t len_key = (uint32_t)GRPC_SLICE_LENGTH(GRPC_MDKEY(elem));
-  wire_value value =
-      get_wire_value(exec_ctx, elem, st->use_true_binary_metadata);
+  wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
   uint32_t len_val = (uint32_t)wire_value_length(value);
   uint32_t len_key_len = GRPC_CHTTP2_VARINT_LENGTH(len_key, 1);
   uint32_t len_val_len = GRPC_CHTTP2_VARINT_LENGTH(len_val, 1);
@@ -462,8 +447,8 @@ static uint32_t dynidx(grpc_chttp2_hpack_compressor* c, uint32_t elem_index) {
 }
 
 /* encode an mdelem */
-static void hpack_enc(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_compressor* c,
-                      grpc_mdelem elem, framer_state* st) {
+static void hpack_enc(grpc_chttp2_hpack_compressor* c, grpc_mdelem elem,
+                      framer_state* st) {
   GPR_ASSERT(GRPC_SLICE_LENGTH(GRPC_MDKEY(elem)) > 0);
   if (GRPC_SLICE_START_PTR(GRPC_MDKEY(elem))[0] != ':') { /* regular header */
     st->seen_regular_header = 1;
@@ -496,7 +481,7 @@ static void hpack_enc(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_compressor* c,
 
   // Key is not interned, emit literals.
   if (!key_interned) {
-    emit_lithdr_noidx_v(exec_ctx, c, 0, elem, st);
+    emit_lithdr_noidx_v(c, 0, elem, st);
     return;
   }
 
@@ -515,16 +500,16 @@ static void hpack_enc(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_compressor* c,
     if (grpc_mdelem_eq(c->entries_elems[HASH_FRAGMENT_2(elem_hash)], elem) &&
         c->indices_elems[HASH_FRAGMENT_2(elem_hash)] > c->tail_remote_index) {
       /* HIT: complete element (first cuckoo hash) */
-      emit_indexed(exec_ctx, c,
-                   dynidx(c, c->indices_elems[HASH_FRAGMENT_2(elem_hash)]), st);
+      emit_indexed(c, dynidx(c, c->indices_elems[HASH_FRAGMENT_2(elem_hash)]),
+                   st);
       return;
     }
 
     if (grpc_mdelem_eq(c->entries_elems[HASH_FRAGMENT_3(elem_hash)], elem) &&
         c->indices_elems[HASH_FRAGMENT_3(elem_hash)] > c->tail_remote_index) {
       /* HIT: complete element (second cuckoo hash) */
-      emit_indexed(exec_ctx, c,
-                   dynidx(c, c->indices_elems[HASH_FRAGMENT_3(elem_hash)]), st);
+      emit_indexed(c, dynidx(c, c->indices_elems[HASH_FRAGMENT_3(elem_hash)]),
+                   st);
       return;
     }
   }
@@ -538,10 +523,10 @@ static void hpack_enc(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_compressor* c,
                          decoder_space_usage < MAX_DECODER_SPACE_USAGE &&
                          c->filter_elems[HASH_FRAGMENT_1(elem_hash)] >=
                              c->filter_elems_sum / ONE_ON_ADD_PROBABILITY;
-  void (*maybe_add)(grpc_exec_ctx*, grpc_chttp2_hpack_compressor*, grpc_mdelem,
-                    size_t) = should_add_elem ? add_elem : add_nothing;
-  void (*emit)(grpc_exec_ctx*, grpc_chttp2_hpack_compressor*, uint32_t,
-               grpc_mdelem, framer_state*) =
+  void (*maybe_add)(grpc_chttp2_hpack_compressor*, grpc_mdelem, size_t) =
+      should_add_elem ? add_elem : add_nothing;
+  void (*emit)(grpc_chttp2_hpack_compressor*, uint32_t, grpc_mdelem,
+               framer_state*) =
       should_add_elem ? emit_lithdr_incidx : emit_lithdr_noidx;
 
   /* no hits for the elem... maybe there's a key? */
@@ -550,8 +535,8 @@ static void hpack_enc(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_compressor* c,
                     GRPC_MDKEY(elem)) &&
       indices_key > c->tail_remote_index) {
     /* HIT: key (first cuckoo hash) */
-    emit(exec_ctx, c, dynidx(c, indices_key), elem, st);
-    maybe_add(exec_ctx, c, elem, decoder_space_usage);
+    emit(c, dynidx(c, indices_key), elem, st);
+    maybe_add(c, elem, decoder_space_usage);
     return;
   }
 
@@ -560,8 +545,8 @@ static void hpack_enc(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_compressor* c,
                     GRPC_MDKEY(elem)) &&
       indices_key > c->tail_remote_index) {
     /* HIT: key (first cuckoo hash) */
-    emit(exec_ctx, c, dynidx(c, indices_key), elem, st);
-    maybe_add(exec_ctx, c, elem, decoder_space_usage);
+    emit(c, dynidx(c, indices_key), elem, st);
+    maybe_add(c, elem, decoder_space_usage);
     return;
   }
 
@@ -572,24 +557,23 @@ static void hpack_enc(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_compressor* c,
                                              : emit_lithdr_noidx_v;
   maybe_add =
       should_add_elem ? add_elem : (should_add_key ? add_key : add_nothing);
-  emit(exec_ctx, c, 0, elem, st);
-  maybe_add(exec_ctx, c, elem, decoder_space_usage);
+  emit(c, 0, elem, st);
+  maybe_add(c, elem, decoder_space_usage);
 }
 
 #define STRLEN_LIT(x) (sizeof(x) - 1)
 #define TIMEOUT_KEY "grpc-timeout"
 
-static void deadline_enc(grpc_exec_ctx* exec_ctx,
-                         grpc_chttp2_hpack_compressor* c, grpc_millis deadline,
+static void deadline_enc(grpc_chttp2_hpack_compressor* c, grpc_millis deadline,
                          framer_state* st) {
   char timeout_str[GRPC_HTTP2_TIMEOUT_ENCODE_MIN_BUFSIZE];
   grpc_mdelem mdelem;
-  grpc_http2_encode_timeout(deadline - grpc_exec_ctx_now(exec_ctx),
+  grpc_http2_encode_timeout(deadline - grpc_core::ExecCtx::Get()->Now(),
                             timeout_str);
-  mdelem = grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_GRPC_TIMEOUT,
+  mdelem = grpc_mdelem_from_slices(GRPC_MDSTR_GRPC_TIMEOUT,
                                    grpc_slice_from_copied_string(timeout_str));
-  hpack_enc(exec_ctx, c, mdelem, st);
-  GRPC_MDELEM_UNREF(exec_ctx, mdelem);
+  hpack_enc(c, mdelem, st);
+  GRPC_MDELEM_UNREF(mdelem);
 }
 
 static uint32_t elems_for_bytes(uint32_t bytes) { return (bytes + 31) / 32; }
@@ -609,14 +593,13 @@ void grpc_chttp2_hpack_compressor_init(grpc_chttp2_hpack_compressor* c) {
   }
 }
 
-void grpc_chttp2_hpack_compressor_destroy(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_hpack_compressor* c) {
+void grpc_chttp2_hpack_compressor_destroy(grpc_chttp2_hpack_compressor* c) {
   int i;
   for (i = 0; i < GRPC_CHTTP2_HPACKC_NUM_VALUES; i++) {
     if (c->entries_keys[i].refcount != &terminal_slice_refcount) {
-      grpc_slice_unref_internal(exec_ctx, c->entries_keys[i]);
+      grpc_slice_unref_internal(c->entries_keys[i]);
     }
-    GRPC_MDELEM_UNREF(exec_ctx, c->entries_elems[i]);
+    GRPC_MDELEM_UNREF(c->entries_elems[i]);
   }
   gpr_free(c->table_elem_size);
 }
@@ -672,8 +655,7 @@ void grpc_chttp2_hpack_compressor_set_max_table_size(
   }
 }
 
-void grpc_chttp2_encode_header(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_compressor* c,
+void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor* c,
                                grpc_mdelem** extra_headers,
                                size_t extra_headers_size,
                                grpc_metadata_batch* metadata,
@@ -699,15 +681,15 @@ void grpc_chttp2_encode_header(grpc_exec_ctx* exec_ctx,
     emit_advertise_table_size_change(c, &st);
   }
   for (size_t i = 0; i < extra_headers_size; ++i) {
-    hpack_enc(exec_ctx, c, *extra_headers[i], &st);
+    hpack_enc(c, *extra_headers[i], &st);
   }
   grpc_metadata_batch_assert_ok(metadata);
   for (grpc_linked_mdelem* l = metadata->list.head; l; l = l->next) {
-    hpack_enc(exec_ctx, c, l->md, &st);
+    hpack_enc(c, l->md, &st);
   }
   grpc_millis deadline = metadata->deadline;
   if (deadline != GRPC_MILLIS_INF_FUTURE) {
-    deadline_enc(exec_ctx, c, deadline, &st);
+    deadline_enc(c, deadline, &st);
   }
 
   finish_frame(&st, 1, options->is_eof);
diff --git a/src/core/ext/transport/chttp2/transport/hpack_encoder.h b/src/core/ext/transport/chttp2/transport/hpack_encoder.h
index 08921b19ec..a26514cab0 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_encoder.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.h
@@ -70,8 +70,7 @@ typedef struct {
 } grpc_chttp2_hpack_compressor;
 
 void grpc_chttp2_hpack_compressor_init(grpc_chttp2_hpack_compressor* c);
-void grpc_chttp2_hpack_compressor_destroy(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_hpack_compressor* c);
+void grpc_chttp2_hpack_compressor_destroy(grpc_chttp2_hpack_compressor* c);
 void grpc_chttp2_hpack_compressor_set_max_table_size(
     grpc_chttp2_hpack_compressor* c, uint32_t max_table_size);
 void grpc_chttp2_hpack_compressor_set_max_usable_size(
@@ -85,8 +84,7 @@ typedef struct {
   grpc_transport_one_way_stats* stats;
 } grpc_encode_header_options;
 
-void grpc_chttp2_encode_header(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_compressor* c,
+void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor* c,
                                grpc_mdelem** extra_headers,
                                size_t extra_headers_size,
                                grpc_metadata_batch* metadata,
diff --git a/src/core/ext/transport/chttp2/transport/hpack_parser.cc b/src/core/ext/transport/chttp2/transport/hpack_parser.cc
index 18cb27f199..a395ab234c 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_parser.cc
+++ b/src/core/ext/transport/chttp2/transport/hpack_parser.cc
@@ -61,96 +61,69 @@ typedef enum {
    a set of indirect jumps, and so not waste stack space. */
 
 /* forward declarations for parsing states */
-static grpc_error* parse_begin(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_begin(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                const uint8_t* end);
-static grpc_error* parse_error(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_error(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                const uint8_t* end, grpc_error* error);
-static grpc_error* still_parse_error(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hpack_parser* p,
+static grpc_error* still_parse_error(grpc_chttp2_hpack_parser* p,
                                      const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_illegal_op(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_illegal_op(grpc_chttp2_hpack_parser* p,
                                     const uint8_t* cur, const uint8_t* end);
 
-static grpc_error* parse_string_prefix(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_string_prefix(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_key_string(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_key_string(grpc_chttp2_hpack_parser* p,
                                     const uint8_t* cur, const uint8_t* end);
 static grpc_error* parse_value_string_with_indexed_key(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_parser* p, const uint8_t* cur,
-    const uint8_t* end);
+    grpc_chttp2_hpack_parser* p, const uint8_t* cur, const uint8_t* end);
 static grpc_error* parse_value_string_with_literal_key(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_parser* p, const uint8_t* cur,
-    const uint8_t* end);
+    grpc_chttp2_hpack_parser* p, const uint8_t* cur, const uint8_t* end);
 
-static grpc_error* parse_value0(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value0(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end);
-static grpc_error* parse_value1(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value1(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end);
-static grpc_error* parse_value2(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value2(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end);
-static grpc_error* parse_value3(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value3(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end);
-static grpc_error* parse_value4(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value4(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end);
-static grpc_error* parse_value5up(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_value5up(grpc_chttp2_hpack_parser* p,
                                   const uint8_t* cur, const uint8_t* end);
 
-static grpc_error* parse_indexed_field(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_indexed_field(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_indexed_field_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_indexed_field_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_lithdr_incidx(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_incidx(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_lithdr_incidx_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_incidx_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_lithdr_incidx_v(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_incidx_v(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_lithdr_notidx(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_notidx(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_lithdr_notidx_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_notidx_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_lithdr_notidx_v(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_notidx_v(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_lithdr_nvridx(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_nvridx(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_lithdr_nvridx_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_nvridx_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_lithdr_nvridx_v(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_nvridx_v(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_max_tbl_size(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_max_tbl_size(grpc_chttp2_hpack_parser* p,
                                       const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_max_tbl_size_x(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_max_tbl_size_x(grpc_chttp2_hpack_parser* p,
                                         const uint8_t* cur, const uint8_t* end);
 
 /* we translate the first byte of a hpack field into one of these decoding
@@ -649,8 +622,8 @@ static const uint8_t inverse_base64[256] = {
 };
 
 /* emission helpers */
-static grpc_error* on_hdr(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_parser* p,
-                          grpc_mdelem md, int add_to_table) {
+static grpc_error* on_hdr(grpc_chttp2_hpack_parser* p, grpc_mdelem md,
+                          int add_to_table) {
   if (grpc_http_trace.enabled()) {
     char* k = grpc_slice_to_c_string(GRPC_MDKEY(md));
     char* v = nullptr;
@@ -671,26 +644,25 @@ static grpc_error* on_hdr(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_parser* p,
   if (add_to_table) {
     GPR_ASSERT(GRPC_MDELEM_STORAGE(md) == GRPC_MDELEM_STORAGE_INTERNED ||
                GRPC_MDELEM_STORAGE(md) == GRPC_MDELEM_STORAGE_STATIC);
-    grpc_error* err = grpc_chttp2_hptbl_add(exec_ctx, &p->table, md);
+    grpc_error* err = grpc_chttp2_hptbl_add(&p->table, md);
     if (err != GRPC_ERROR_NONE) return err;
   }
   if (p->on_header == nullptr) {
-    GRPC_MDELEM_UNREF(exec_ctx, md);
+    GRPC_MDELEM_UNREF(md);
     return GRPC_ERROR_CREATE_FROM_STATIC_STRING("on_header callback not set");
   }
-  p->on_header(exec_ctx, p->on_header_user_data, md);
+  p->on_header(p->on_header_user_data, md);
   return GRPC_ERROR_NONE;
 }
 
-static grpc_slice take_string(grpc_exec_ctx* exec_ctx,
-                              grpc_chttp2_hpack_parser* p,
+static grpc_slice take_string(grpc_chttp2_hpack_parser* p,
                               grpc_chttp2_hpack_parser_string* str,
                               bool intern) {
   grpc_slice s;
   if (!str->copied) {
     if (intern) {
       s = grpc_slice_intern(str->data.referenced);
-      grpc_slice_unref_internal(exec_ctx, str->data.referenced);
+      grpc_slice_unref_internal(str->data.referenced);
     } else {
       s = str->data.referenced;
     }
@@ -708,85 +680,77 @@ static grpc_slice take_string(grpc_exec_ctx* exec_ctx,
 }
 
 /* jump to the next state */
-static grpc_error* parse_next(grpc_exec_ctx* exec_ctx,
-                              grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_next(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                               const uint8_t* end) {
   p->state = *p->next_state++;
-  return p->state(exec_ctx, p, cur, end);
+  return p->state(p, cur, end);
 }
 
 /* begin parsing a header: all functionality is encoded into lookup tables
    above */
-static grpc_error* parse_begin(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_begin(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                const uint8_t* end) {
   if (cur == end) {
     p->state = parse_begin;
     return GRPC_ERROR_NONE;
   }
 
-  return first_byte_action[first_byte_lut[*cur]](exec_ctx, p, cur, end);
+  return first_byte_action[first_byte_lut[*cur]](p, cur, end);
 }
 
 /* stream dependency and prioritization data: we just skip it */
-static grpc_error* parse_stream_weight(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_stream_weight(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   if (cur == end) {
     p->state = parse_stream_weight;
     return GRPC_ERROR_NONE;
   }
 
-  return p->after_prioritization(exec_ctx, p, cur + 1, end);
+  return p->after_prioritization(p, cur + 1, end);
 }
 
-static grpc_error* parse_stream_dep3(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_stream_dep3(grpc_chttp2_hpack_parser* p,
                                      const uint8_t* cur, const uint8_t* end) {
   if (cur == end) {
     p->state = parse_stream_dep3;
     return GRPC_ERROR_NONE;
   }
 
-  return parse_stream_weight(exec_ctx, p, cur + 1, end);
+  return parse_stream_weight(p, cur + 1, end);
 }
 
-static grpc_error* parse_stream_dep2(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_stream_dep2(grpc_chttp2_hpack_parser* p,
                                      const uint8_t* cur, const uint8_t* end) {
   if (cur == end) {
     p->state = parse_stream_dep2;
     return GRPC_ERROR_NONE;
   }
 
-  return parse_stream_dep3(exec_ctx, p, cur + 1, end);
+  return parse_stream_dep3(p, cur + 1, end);
 }
 
-static grpc_error* parse_stream_dep1(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_stream_dep1(grpc_chttp2_hpack_parser* p,
                                      const uint8_t* cur, const uint8_t* end) {
   if (cur == end) {
     p->state = parse_stream_dep1;
     return GRPC_ERROR_NONE;
   }
 
-  return parse_stream_dep2(exec_ctx, p, cur + 1, end);
+  return parse_stream_dep2(p, cur + 1, end);
 }
 
-static grpc_error* parse_stream_dep0(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_stream_dep0(grpc_chttp2_hpack_parser* p,
                                      const uint8_t* cur, const uint8_t* end) {
   if (cur == end) {
     p->state = parse_stream_dep0;
     return GRPC_ERROR_NONE;
   }
 
-  return parse_stream_dep1(exec_ctx, p, cur + 1, end);
+  return parse_stream_dep1(p, cur + 1, end);
 }
 
 /* emit an indexed field; jumps to begin the next field on completion */
-static grpc_error* finish_indexed_field(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_indexed_field(grpc_chttp2_hpack_parser* p,
                                         const uint8_t* cur,
                                         const uint8_t* end) {
   grpc_mdelem md = grpc_chttp2_hptbl_lookup(&p->table, p->index);
@@ -798,24 +762,22 @@ static grpc_error* finish_indexed_field(grpc_exec_ctx* exec_ctx,
         GRPC_ERROR_INT_SIZE, (intptr_t)p->table.num_ents);
   }
   GRPC_MDELEM_REF(md);
-  GRPC_STATS_INC_HPACK_RECV_INDEXED(exec_ctx);
-  grpc_error* err = on_hdr(exec_ctx, p, md, 0);
+  GRPC_STATS_INC_HPACK_RECV_INDEXED();
+  grpc_error* err = on_hdr(p, md, 0);
   if (err != GRPC_ERROR_NONE) return err;
-  return parse_begin(exec_ctx, p, cur, end);
+  return parse_begin(p, cur, end);
 }
 
 /* parse an indexed field with index < 127 */
-static grpc_error* parse_indexed_field(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_indexed_field(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   p->dynamic_table_update_allowed = 0;
   p->index = (*cur) & 0x7f;
-  return finish_indexed_field(exec_ctx, p, cur + 1, end);
+  return finish_indexed_field(p, cur + 1, end);
 }
 
 /* parse an indexed field with index >= 127 */
-static grpc_error* parse_indexed_field_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_indexed_field_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -824,56 +786,52 @@ static grpc_error* parse_indexed_field_x(grpc_exec_ctx* exec_ctx,
   p->next_state = and_then;
   p->index = 0x7f;
   p->parsing.value = &p->index;
-  return parse_value0(exec_ctx, p, cur + 1, end);
+  return parse_value0(p, cur + 1, end);
 }
 
 /* finish a literal header with incremental indexing */
-static grpc_error* finish_lithdr_incidx(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_lithdr_incidx(grpc_chttp2_hpack_parser* p,
                                         const uint8_t* cur,
                                         const uint8_t* end) {
   grpc_mdelem md = grpc_chttp2_hptbl_lookup(&p->table, p->index);
   GPR_ASSERT(!GRPC_MDISNULL(md)); /* handled in string parsing */
-  GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX(exec_ctx);
-  grpc_error* err = on_hdr(
-      exec_ctx, p,
-      grpc_mdelem_from_slices(exec_ctx, grpc_slice_ref_internal(GRPC_MDKEY(md)),
-                              take_string(exec_ctx, p, &p->value, true)),
-      1);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+  GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX();
+  grpc_error* err =
+      on_hdr(p,
+             grpc_mdelem_from_slices(grpc_slice_ref_internal(GRPC_MDKEY(md)),
+                                     take_string(p, &p->value, true)),
+             1);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* finish a literal header with incremental indexing with no index */
-static grpc_error* finish_lithdr_incidx_v(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_lithdr_incidx_v(grpc_chttp2_hpack_parser* p,
                                           const uint8_t* cur,
                                           const uint8_t* end) {
-  GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX_V(exec_ctx);
-  grpc_error* err = on_hdr(
-      exec_ctx, p,
-      grpc_mdelem_from_slices(exec_ctx, take_string(exec_ctx, p, &p->key, true),
-                              take_string(exec_ctx, p, &p->value, true)),
-      1);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+  GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX_V();
+  grpc_error* err =
+      on_hdr(p,
+             grpc_mdelem_from_slices(take_string(p, &p->key, true),
+                                     take_string(p, &p->value, true)),
+             1);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* parse a literal header with incremental indexing; index < 63 */
-static grpc_error* parse_lithdr_incidx(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_incidx(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_value_string_with_indexed_key, finish_lithdr_incidx};
   p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   p->index = (*cur) & 0x3f;
-  return parse_string_prefix(exec_ctx, p, cur + 1, end);
+  return parse_string_prefix(p, cur + 1, end);
 }
 
 /* parse a literal header with incremental indexing; index >= 63 */
-static grpc_error* parse_lithdr_incidx_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_incidx_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -883,12 +841,11 @@ static grpc_error* parse_lithdr_incidx_x(grpc_exec_ctx* exec_ctx,
   p->next_state = and_then;
   p->index = 0x3f;
   p->parsing.value = &p->index;
-  return parse_value0(exec_ctx, p, cur + 1, end);
+  return parse_value0(p, cur + 1, end);
 }
 
 /* parse a literal header with incremental indexing; index = 0 */
-static grpc_error* parse_lithdr_incidx_v(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_incidx_v(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -896,56 +853,52 @@ static grpc_error* parse_lithdr_incidx_v(grpc_exec_ctx* exec_ctx,
       parse_value_string_with_literal_key, finish_lithdr_incidx_v};
   p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
-  return parse_string_prefix(exec_ctx, p, cur + 1, end);
+  return parse_string_prefix(p, cur + 1, end);
 }
 
 /* finish a literal header without incremental indexing */
-static grpc_error* finish_lithdr_notidx(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_lithdr_notidx(grpc_chttp2_hpack_parser* p,
                                         const uint8_t* cur,
                                         const uint8_t* end) {
   grpc_mdelem md = grpc_chttp2_hptbl_lookup(&p->table, p->index);
   GPR_ASSERT(!GRPC_MDISNULL(md)); /* handled in string parsing */
-  GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX(exec_ctx);
-  grpc_error* err = on_hdr(
-      exec_ctx, p,
-      grpc_mdelem_from_slices(exec_ctx, grpc_slice_ref_internal(GRPC_MDKEY(md)),
-                              take_string(exec_ctx, p, &p->value, false)),
-      0);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+  GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX();
+  grpc_error* err =
+      on_hdr(p,
+             grpc_mdelem_from_slices(grpc_slice_ref_internal(GRPC_MDKEY(md)),
+                                     take_string(p, &p->value, false)),
+             0);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* finish a literal header without incremental indexing with index = 0 */
-static grpc_error* finish_lithdr_notidx_v(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_lithdr_notidx_v(grpc_chttp2_hpack_parser* p,
                                           const uint8_t* cur,
                                           const uint8_t* end) {
-  GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX_V(exec_ctx);
-  grpc_error* err = on_hdr(
-      exec_ctx, p,
-      grpc_mdelem_from_slices(exec_ctx, take_string(exec_ctx, p, &p->key, true),
-                              take_string(exec_ctx, p, &p->value, false)),
-      0);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+  GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX_V();
+  grpc_error* err =
+      on_hdr(p,
+             grpc_mdelem_from_slices(take_string(p, &p->key, true),
+                                     take_string(p, &p->value, false)),
+             0);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* parse a literal header without incremental indexing; index < 15 */
-static grpc_error* parse_lithdr_notidx(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_notidx(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_value_string_with_indexed_key, finish_lithdr_notidx};
   p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   p->index = (*cur) & 0xf;
-  return parse_string_prefix(exec_ctx, p, cur + 1, end);
+  return parse_string_prefix(p, cur + 1, end);
 }
 
 /* parse a literal header without incremental indexing; index >= 15 */
-static grpc_error* parse_lithdr_notidx_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_notidx_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -955,12 +908,11 @@ static grpc_error* parse_lithdr_notidx_x(grpc_exec_ctx* exec_ctx,
   p->next_state = and_then;
   p->index = 0xf;
   p->parsing.value = &p->index;
-  return parse_value0(exec_ctx, p, cur + 1, end);
+  return parse_value0(p, cur + 1, end);
 }
 
 /* parse a literal header without incremental indexing; index == 0 */
-static grpc_error* parse_lithdr_notidx_v(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_notidx_v(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -968,56 +920,52 @@ static grpc_error* parse_lithdr_notidx_v(grpc_exec_ctx* exec_ctx,
       parse_value_string_with_literal_key, finish_lithdr_notidx_v};
   p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
-  return parse_string_prefix(exec_ctx, p, cur + 1, end);
+  return parse_string_prefix(p, cur + 1, end);
 }
 
 /* finish a literal header that is never indexed */
-static grpc_error* finish_lithdr_nvridx(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_lithdr_nvridx(grpc_chttp2_hpack_parser* p,
                                         const uint8_t* cur,
                                         const uint8_t* end) {
   grpc_mdelem md = grpc_chttp2_hptbl_lookup(&p->table, p->index);
   GPR_ASSERT(!GRPC_MDISNULL(md)); /* handled in string parsing */
-  GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX(exec_ctx);
-  grpc_error* err = on_hdr(
-      exec_ctx, p,
-      grpc_mdelem_from_slices(exec_ctx, grpc_slice_ref_internal(GRPC_MDKEY(md)),
-                              take_string(exec_ctx, p, &p->value, false)),
-      0);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+  GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX();
+  grpc_error* err =
+      on_hdr(p,
+             grpc_mdelem_from_slices(grpc_slice_ref_internal(GRPC_MDKEY(md)),
+                                     take_string(p, &p->value, false)),
+             0);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* finish a literal header that is never indexed with an extra value */
-static grpc_error* finish_lithdr_nvridx_v(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_lithdr_nvridx_v(grpc_chttp2_hpack_parser* p,
                                           const uint8_t* cur,
                                           const uint8_t* end) {
-  GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX_V(exec_ctx);
-  grpc_error* err = on_hdr(
-      exec_ctx, p,
-      grpc_mdelem_from_slices(exec_ctx, take_string(exec_ctx, p, &p->key, true),
-                              take_string(exec_ctx, p, &p->value, false)),
-      0);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+  GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX_V();
+  grpc_error* err =
+      on_hdr(p,
+             grpc_mdelem_from_slices(take_string(p, &p->key, true),
+                                     take_string(p, &p->value, false)),
+             0);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* parse a literal header that is never indexed; index < 15 */
-static grpc_error* parse_lithdr_nvridx(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_nvridx(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_value_string_with_indexed_key, finish_lithdr_nvridx};
   p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   p->index = (*cur) & 0xf;
-  return parse_string_prefix(exec_ctx, p, cur + 1, end);
+  return parse_string_prefix(p, cur + 1, end);
 }
 
 /* parse a literal header that is never indexed; index >= 15 */
-static grpc_error* parse_lithdr_nvridx_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_nvridx_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -1027,12 +975,11 @@ static grpc_error* parse_lithdr_nvridx_x(grpc_exec_ctx* exec_ctx,
   p->next_state = and_then;
   p->index = 0xf;
   p->parsing.value = &p->index;
-  return parse_value0(exec_ctx, p, cur + 1, end);
+  return parse_value0(p, cur + 1, end);
 }
 
 /* parse a literal header that is never indexed; index == 0 */
-static grpc_error* parse_lithdr_nvridx_v(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_nvridx_v(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -1040,47 +987,44 @@ static grpc_error* parse_lithdr_nvridx_v(grpc_exec_ctx* exec_ctx,
       parse_value_string_with_literal_key, finish_lithdr_nvridx_v};
   p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
-  return parse_string_prefix(exec_ctx, p, cur + 1, end);
+  return parse_string_prefix(p, cur + 1, end);
 }
 
 /* finish parsing a max table size change */
-static grpc_error* finish_max_tbl_size(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_max_tbl_size(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   if (grpc_http_trace.enabled()) {
     gpr_log(GPR_INFO, "MAX TABLE SIZE: %d", p->index);
   }
   grpc_error* err =
-      grpc_chttp2_hptbl_set_current_table_size(exec_ctx, &p->table, p->index);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+      grpc_chttp2_hptbl_set_current_table_size(&p->table, p->index);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* parse a max table size change, max size < 15 */
-static grpc_error* parse_max_tbl_size(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_max_tbl_size(grpc_chttp2_hpack_parser* p,
                                       const uint8_t* cur, const uint8_t* end) {
   if (p->dynamic_table_update_allowed == 0) {
     return parse_error(
-        exec_ctx, p, cur, end,
+        p, cur, end,
         GRPC_ERROR_CREATE_FROM_STATIC_STRING(
             "More than two max table size changes in a single frame"));
   }
   p->dynamic_table_update_allowed--;
   p->index = (*cur) & 0x1f;
-  return finish_max_tbl_size(exec_ctx, p, cur + 1, end);
+  return finish_max_tbl_size(p, cur + 1, end);
 }
 
 /* parse a max table size change, max size >= 15 */
-static grpc_error* parse_max_tbl_size_x(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_max_tbl_size_x(grpc_chttp2_hpack_parser* p,
                                         const uint8_t* cur,
                                         const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       finish_max_tbl_size};
   if (p->dynamic_table_update_allowed == 0) {
     return parse_error(
-        exec_ctx, p, cur, end,
+        p, cur, end,
         GRPC_ERROR_CREATE_FROM_STATIC_STRING(
             "More than two max table size changes in a single frame"));
   }
@@ -1088,12 +1032,11 @@ static grpc_error* parse_max_tbl_size_x(grpc_exec_ctx* exec_ctx,
   p->next_state = and_then;
   p->index = 0x1f;
   p->parsing.value = &p->index;
-  return parse_value0(exec_ctx, p, cur + 1, end);
+  return parse_value0(p, cur + 1, end);
 }
 
 /* a parse error: jam the parse state into parse_error, and return error */
-static grpc_error* parse_error(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_error(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                const uint8_t* end, grpc_error* err) {
   GPR_ASSERT(err != GRPC_ERROR_NONE);
   if (p->last_error == GRPC_ERROR_NONE) {
@@ -1103,27 +1046,24 @@ static grpc_error* parse_error(grpc_exec_ctx* exec_ctx,
   return err;
 }
 
-static grpc_error* still_parse_error(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hpack_parser* p,
+static grpc_error* still_parse_error(grpc_chttp2_hpack_parser* p,
                                      const uint8_t* cur, const uint8_t* end) {
   return GRPC_ERROR_REF(p->last_error);
 }
 
-static grpc_error* parse_illegal_op(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_illegal_op(grpc_chttp2_hpack_parser* p,
                                     const uint8_t* cur, const uint8_t* end) {
   GPR_ASSERT(cur != end);
   char* msg;
   gpr_asprintf(&msg, "Illegal hpack op code %d", *cur);
   grpc_error* err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
   gpr_free(msg);
-  return parse_error(exec_ctx, p, cur, end, err);
+  return parse_error(p, cur, end, err);
 }
 
 /* parse the 1st byte of a varint into p->parsing.value
    no overflow is possible */
-static grpc_error* parse_value0(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value0(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end) {
   if (cur == end) {
     p->state = parse_value0;
@@ -1133,16 +1073,15 @@ static grpc_error* parse_value0(grpc_exec_ctx* exec_ctx,
   *p->parsing.value += (*cur) & 0x7f;
 
   if ((*cur) & 0x80) {
-    return parse_value1(exec_ctx, p, cur + 1, end);
+    return parse_value1(p, cur + 1, end);
   } else {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 }
 
 /* parse the 2nd byte of a varint into p->parsing.value
    no overflow is possible */
-static grpc_error* parse_value1(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value1(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end) {
   if (cur == end) {
     p->state = parse_value1;
@@ -1152,16 +1091,15 @@ static grpc_error* parse_value1(grpc_exec_ctx* exec_ctx,
   *p->parsing.value += (((uint32_t)*cur) & 0x7f) << 7;
 
   if ((*cur) & 0x80) {
-    return parse_value2(exec_ctx, p, cur + 1, end);
+    return parse_value2(p, cur + 1, end);
   } else {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 }
 
 /* parse the 3rd byte of a varint into p->parsing.value
    no overflow is possible */
-static grpc_error* parse_value2(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value2(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end) {
   if (cur == end) {
     p->state = parse_value2;
@@ -1171,16 +1109,15 @@ static grpc_error* parse_value2(grpc_exec_ctx* exec_ctx,
   *p->parsing.value += (((uint32_t)*cur) & 0x7f) << 14;
 
   if ((*cur) & 0x80) {
-    return parse_value3(exec_ctx, p, cur + 1, end);
+    return parse_value3(p, cur + 1, end);
   } else {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 }
 
 /* parse the 4th byte of a varint into p->parsing.value
    no overflow is possible */
-static grpc_error* parse_value3(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value3(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end) {
   if (cur == end) {
     p->state = parse_value3;
@@ -1190,16 +1127,15 @@ static grpc_error* parse_value3(grpc_exec_ctx* exec_ctx,
   *p->parsing.value += (((uint32_t)*cur) & 0x7f) << 21;
 
   if ((*cur) & 0x80) {
-    return parse_value4(exec_ctx, p, cur + 1, end);
+    return parse_value4(p, cur + 1, end);
   } else {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 }
 
 /* parse the 5th byte of a varint into p->parsing.value
    depending on the byte, we may overflow, and care must be taken */
-static grpc_error* parse_value4(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value4(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end) {
   uint8_t c;
   uint32_t cur_value;
@@ -1225,9 +1161,9 @@ static grpc_error* parse_value4(grpc_exec_ctx* exec_ctx,
   *p->parsing.value = cur_value + add_value;
 
   if ((*cur) & 0x80) {
-    return parse_value5up(exec_ctx, p, cur + 1, end);
+    return parse_value5up(p, cur + 1, end);
   } else {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 
 error:
@@ -1237,14 +1173,13 @@ error:
                *p->parsing.value, *cur);
   grpc_error* err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
   gpr_free(msg);
-  return parse_error(exec_ctx, p, cur, end, err);
+  return parse_error(p, cur, end, err);
 }
 
 /* parse any trailing bytes in a varint: it's possible to append an arbitrary
    number of 0x80's and not affect the value - a zero will terminate - and
    anything else will overflow */
-static grpc_error* parse_value5up(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_value5up(grpc_chttp2_hpack_parser* p,
                                   const uint8_t* cur, const uint8_t* end) {
   while (cur != end && *cur == 0x80) {
     ++cur;
@@ -1256,7 +1191,7 @@ static grpc_error* parse_value5up(grpc_exec_ctx* exec_ctx,
   }
 
   if (*cur == 0) {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 
   char* msg;
@@ -1266,12 +1201,11 @@ static grpc_error* parse_value5up(grpc_exec_ctx* exec_ctx,
                *p->parsing.value, *cur);
   grpc_error* err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
   gpr_free(msg);
-  return parse_error(exec_ctx, p, cur, end, err);
+  return parse_error(p, cur, end, err);
 }
 
 /* parse a string prefix */
-static grpc_error* parse_string_prefix(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_string_prefix(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   if (cur == end) {
     p->state = parse_string_prefix;
@@ -1282,9 +1216,9 @@ static grpc_error* parse_string_prefix(grpc_exec_ctx* exec_ctx,
   p->huff = (*cur) >> 7;
   if (p->strlen == 0x7f) {
     p->parsing.value = &p->strlen;
-    return parse_value0(exec_ctx, p, cur + 1, end);
+    return parse_value0(p, cur + 1, end);
   } else {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 }
 
@@ -1303,8 +1237,7 @@ static void append_bytes(grpc_chttp2_hpack_parser_string* str,
   str->data.copied.length += (uint32_t)length;
 }
 
-static grpc_error* append_string(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_hpack_parser* p,
+static grpc_error* append_string(grpc_chttp2_hpack_parser* p,
                                  const uint8_t* cur, const uint8_t* end) {
   grpc_chttp2_hpack_parser_string* str = p->parsing.str;
   uint32_t bits;
@@ -1322,11 +1255,11 @@ static grpc_error* append_string(grpc_exec_ctx* exec_ctx,
         /* 'true-binary' case */
         ++cur;
         p->binary = NOT_BINARY;
-        GRPC_STATS_INC_HPACK_RECV_BINARY(exec_ctx);
+        GRPC_STATS_INC_HPACK_RECV_BINARY();
         append_bytes(str, cur, (size_t)(end - cur));
         return GRPC_ERROR_NONE;
       }
-      GRPC_STATS_INC_HPACK_RECV_BINARY_BASE64(exec_ctx);
+      GRPC_STATS_INC_HPACK_RECV_BINARY_BASE64();
     /* fallthrough */
     b64_byte0:
     case B64_BYTE0:
@@ -1338,7 +1271,7 @@ static grpc_error* append_string(grpc_exec_ctx* exec_ctx,
       ++cur;
       if (bits == 255)
         return parse_error(
-            exec_ctx, p, cur, end,
+            p, cur, end,
             GRPC_ERROR_CREATE_FROM_STATIC_STRING("Illegal base64 character"));
       else if (bits == 64)
         goto b64_byte0;
@@ -1354,7 +1287,7 @@ static grpc_error* append_string(grpc_exec_ctx* exec_ctx,
       ++cur;
       if (bits == 255)
         return parse_error(
-            exec_ctx, p, cur, end,
+            p, cur, end,
             GRPC_ERROR_CREATE_FROM_STATIC_STRING("Illegal base64 character"));
       else if (bits == 64)
         goto b64_byte1;
@@ -1370,7 +1303,7 @@ static grpc_error* append_string(grpc_exec_ctx* exec_ctx,
       ++cur;
       if (bits == 255)
         return parse_error(
-            exec_ctx, p, cur, end,
+            p, cur, end,
             GRPC_ERROR_CREATE_FROM_STATIC_STRING("Illegal base64 character"));
       else if (bits == 64)
         goto b64_byte2;
@@ -1386,7 +1319,7 @@ static grpc_error* append_string(grpc_exec_ctx* exec_ctx,
       ++cur;
       if (bits == 255)
         return parse_error(
-            exec_ctx, p, cur, end,
+            p, cur, end,
             GRPC_ERROR_CREATE_FROM_STATIC_STRING("Illegal base64 character"));
       else if (bits == 64)
         goto b64_byte3;
@@ -1399,12 +1332,11 @@ static grpc_error* append_string(grpc_exec_ctx* exec_ctx,
       goto b64_byte0;
   }
   GPR_UNREACHABLE_CODE(return parse_error(
-      exec_ctx, p, cur, end,
+      p, cur, end,
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("Should never reach here")));
 }
 
-static grpc_error* finish_str(grpc_exec_ctx* exec_ctx,
-                              grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* finish_str(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                               const uint8_t* end) {
   uint8_t decoded[2];
   uint32_t bits;
@@ -1417,7 +1349,7 @@ static grpc_error* finish_str(grpc_exec_ctx* exec_ctx,
     case B64_BYTE0:
       break;
     case B64_BYTE1:
-      return parse_error(exec_ctx, p, cur, end,
+      return parse_error(p, cur, end,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                              "illegal base64 encoding")); /* illegal encoding */
     case B64_BYTE2:
@@ -1428,7 +1360,7 @@ static grpc_error* finish_str(grpc_exec_ctx* exec_ctx,
                      bits & 0xffff);
         grpc_error* err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
         gpr_free(msg);
-        return parse_error(exec_ctx, p, cur, end, err);
+        return parse_error(p, cur, end, err);
       }
       decoded[0] = (uint8_t)(bits >> 16);
       append_bytes(str, decoded, 1);
@@ -1441,7 +1373,7 @@ static grpc_error* finish_str(grpc_exec_ctx* exec_ctx,
                      bits & 0xff);
         grpc_error* err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
         gpr_free(msg);
-        return parse_error(exec_ctx, p, cur, end, err);
+        return parse_error(p, cur, end, err);
       }
       decoded[0] = (uint8_t)(bits >> 16);
       decoded[1] = (uint8_t)(bits >> 8);
@@ -1452,14 +1384,13 @@ static grpc_error* finish_str(grpc_exec_ctx* exec_ctx,
 }
 
 /* decode a nibble from a huffman encoded stream */
-static grpc_error* huff_nibble(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_parser* p, uint8_t nibble) {
+static grpc_error* huff_nibble(grpc_chttp2_hpack_parser* p, uint8_t nibble) {
   int16_t emit = emit_sub_tbl[16 * emit_tbl[p->huff_state] + nibble];
   int16_t next = next_sub_tbl[16 * next_tbl[p->huff_state] + nibble];
   if (emit != -1) {
     if (emit >= 0 && emit < 256) {
       uint8_t c = (uint8_t)emit;
-      grpc_error* err = append_string(exec_ctx, p, &c, (&c) + 1);
+      grpc_error* err = append_string(p, &c, (&c) + 1);
       if (err != GRPC_ERROR_NONE) return err;
     } else {
       assert(emit == 256);
@@ -1470,45 +1401,42 @@ static grpc_error* huff_nibble(grpc_exec_ctx* exec_ctx,
 }
 
 /* decode full bytes from a huffman encoded stream */
-static grpc_error* add_huff_bytes(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_hpack_parser* p,
+static grpc_error* add_huff_bytes(grpc_chttp2_hpack_parser* p,
                                   const uint8_t* cur, const uint8_t* end) {
   for (; cur != end; ++cur) {
-    grpc_error* err = huff_nibble(exec_ctx, p, *cur >> 4);
-    if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-    err = huff_nibble(exec_ctx, p, *cur & 0xf);
-    if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
+    grpc_error* err = huff_nibble(p, *cur >> 4);
+    if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+    err = huff_nibble(p, *cur & 0xf);
+    if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
   }
   return GRPC_ERROR_NONE;
 }
 
 /* decode some string bytes based on the current decoding mode
    (huffman or not) */
-static grpc_error* add_str_bytes(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_hpack_parser* p,
+static grpc_error* add_str_bytes(grpc_chttp2_hpack_parser* p,
                                  const uint8_t* cur, const uint8_t* end) {
   if (p->huff) {
-    return add_huff_bytes(exec_ctx, p, cur, end);
+    return add_huff_bytes(p, cur, end);
   } else {
-    return append_string(exec_ctx, p, cur, end);
+    return append_string(p, cur, end);
   }
 }
 
 /* parse a string - tries to do large chunks at a time */
-static grpc_error* parse_string(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_string(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end) {
   size_t remaining = p->strlen - p->strgot;
   size_t given = (size_t)(end - cur);
   if (remaining <= given) {
-    grpc_error* err = add_str_bytes(exec_ctx, p, cur, cur + remaining);
-    if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-    err = finish_str(exec_ctx, p, cur + remaining, end);
-    if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-    return parse_next(exec_ctx, p, cur + remaining, end);
+    grpc_error* err = add_str_bytes(p, cur, cur + remaining);
+    if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+    err = finish_str(p, cur + remaining, end);
+    if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+    return parse_next(p, cur + remaining, end);
   } else {
-    grpc_error* err = add_str_bytes(exec_ctx, p, cur, cur + given);
-    if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
+    grpc_error* err = add_str_bytes(p, cur, cur + given);
+    if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
     GPR_ASSERT(given <= UINT32_MAX - p->strgot);
     p->strgot += (uint32_t)given;
     p->state = parse_string;
@@ -1517,20 +1445,19 @@ static grpc_error* parse_string(grpc_exec_ctx* exec_ctx,
 }
 
 /* begin parsing a string - performs setup, calls parse_string */
-static grpc_error* begin_parse_string(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_hpack_parser* p,
+static grpc_error* begin_parse_string(grpc_chttp2_hpack_parser* p,
                                       const uint8_t* cur, const uint8_t* end,
                                       uint8_t binary,
                                       grpc_chttp2_hpack_parser_string* str) {
   if (!p->huff && binary == NOT_BINARY && (end - cur) >= (intptr_t)p->strlen &&
       p->current_slice_refcount != nullptr) {
-    GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED(exec_ctx);
+    GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED();
     str->copied = false;
     str->data.referenced.refcount = p->current_slice_refcount;
     str->data.referenced.data.refcounted.bytes = (uint8_t*)cur;
     str->data.referenced.data.refcounted.length = p->strlen;
     grpc_slice_ref_internal(str->data.referenced);
-    return parse_next(exec_ctx, p, cur + p->strlen, end);
+    return parse_next(p, cur + p->strlen, end);
   }
   p->strgot = 0;
   str->copied = true;
@@ -1541,9 +1468,9 @@ static grpc_error* begin_parse_string(grpc_exec_ctx* exec_ctx,
   switch (p->binary) {
     case NOT_BINARY:
       if (p->huff) {
-        GRPC_STATS_INC_HPACK_RECV_HUFFMAN(exec_ctx);
+        GRPC_STATS_INC_HPACK_RECV_HUFFMAN();
       } else {
-        GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED(exec_ctx);
+        GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED();
       }
       break;
     case BINARY_BEGIN:
@@ -1552,14 +1479,13 @@ static grpc_error* begin_parse_string(grpc_exec_ctx* exec_ctx,
     default:
       abort();
   }
-  return parse_string(exec_ctx, p, cur, end);
+  return parse_string(p, cur, end);
 }
 
 /* parse the key string */
-static grpc_error* parse_key_string(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_key_string(grpc_chttp2_hpack_parser* p,
                                     const uint8_t* cur, const uint8_t* end) {
-  return begin_parse_string(exec_ctx, p, cur, end, NOT_BINARY, &p->key);
+  return begin_parse_string(p, cur, end, NOT_BINARY, &p->key);
 }
 
 /* check if a key represents a binary header or not */
@@ -1586,33 +1512,29 @@ static grpc_error* is_binary_indexed_header(grpc_chttp2_hpack_parser* p,
 }
 
 /* parse the value string */
-static grpc_error* parse_value_string(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_value_string(grpc_chttp2_hpack_parser* p,
                                       const uint8_t* cur, const uint8_t* end,
                                       bool is_binary) {
-  return begin_parse_string(exec_ctx, p, cur, end,
-                            is_binary ? BINARY_BEGIN : NOT_BINARY, &p->value);
+  return begin_parse_string(p, cur, end, is_binary ? BINARY_BEGIN : NOT_BINARY,
+                            &p->value);
 }
 
 static grpc_error* parse_value_string_with_indexed_key(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_parser* p, const uint8_t* cur,
-    const uint8_t* end) {
+    grpc_chttp2_hpack_parser* p, const uint8_t* cur, const uint8_t* end) {
   bool is_binary = false;
   grpc_error* err = is_binary_indexed_header(p, &is_binary);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_value_string(exec_ctx, p, cur, end, is_binary);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_value_string(p, cur, end, is_binary);
 }
 
 static grpc_error* parse_value_string_with_literal_key(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_parser* p, const uint8_t* cur,
-    const uint8_t* end) {
-  return parse_value_string(exec_ctx, p, cur, end, is_binary_literal_header(p));
+    grpc_chttp2_hpack_parser* p, const uint8_t* cur, const uint8_t* end) {
+  return parse_value_string(p, cur, end, is_binary_literal_header(p));
 }
 
 /* PUBLIC INTERFACE */
 
-void grpc_chttp2_hpack_parser_init(grpc_exec_ctx* exec_ctx,
-                                   grpc_chttp2_hpack_parser* p) {
+void grpc_chttp2_hpack_parser_init(grpc_chttp2_hpack_parser* p) {
   p->on_header = nullptr;
   p->on_header_user_data = nullptr;
   p->state = parse_begin;
@@ -1626,7 +1548,7 @@ void grpc_chttp2_hpack_parser_init(grpc_exec_ctx* exec_ctx,
   p->value.data.copied.length = 0;
   p->dynamic_table_update_allowed = 2;
   p->last_error = GRPC_ERROR_NONE;
-  grpc_chttp2_hptbl_init(exec_ctx, &p->table);
+  grpc_chttp2_hptbl_init(&p->table);
 }
 
 void grpc_chttp2_hpack_parser_set_has_priority(grpc_chttp2_hpack_parser* p) {
@@ -1634,18 +1556,16 @@ void grpc_chttp2_hpack_parser_set_has_priority(grpc_chttp2_hpack_parser* p) {
   p->state = parse_stream_dep0;
 }
 
-void grpc_chttp2_hpack_parser_destroy(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_hpack_parser* p) {
-  grpc_chttp2_hptbl_destroy(exec_ctx, &p->table);
+void grpc_chttp2_hpack_parser_destroy(grpc_chttp2_hpack_parser* p) {
+  grpc_chttp2_hptbl_destroy(&p->table);
   GRPC_ERROR_UNREF(p->last_error);
-  grpc_slice_unref_internal(exec_ctx, p->key.data.referenced);
-  grpc_slice_unref_internal(exec_ctx, p->value.data.referenced);
+  grpc_slice_unref_internal(p->key.data.referenced);
+  grpc_slice_unref_internal(p->value.data.referenced);
   gpr_free(p->key.data.copied.str);
   gpr_free(p->value.data.copied.str);
 }
 
-grpc_error* grpc_chttp2_hpack_parser_parse(grpc_exec_ctx* exec_ctx,
-                                           grpc_chttp2_hpack_parser* p,
+grpc_error* grpc_chttp2_hpack_parser_parse(grpc_chttp2_hpack_parser* p,
                                            grpc_slice slice) {
 /* max number of bytes to parse at a time... limits call stack depth on
  * compilers without TCO */
@@ -1656,37 +1576,33 @@ grpc_error* grpc_chttp2_hpack_parser_parse(grpc_exec_ctx* exec_ctx,
   grpc_error* error = GRPC_ERROR_NONE;
   while (start != end && error == GRPC_ERROR_NONE) {
     uint8_t* target = start + GPR_MIN(MAX_PARSE_LENGTH, end - start);
-    error = p->state(exec_ctx, p, start, target);
+    error = p->state(p, start, target);
     start = target;
   }
   p->current_slice_refcount = nullptr;
   return error;
 }
 
-typedef void (*maybe_complete_func_type)(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_transport* t,
+typedef void (*maybe_complete_func_type)(grpc_chttp2_transport* t,
                                          grpc_chttp2_stream* s);
 static const maybe_complete_func_type maybe_complete_funcs[] = {
     grpc_chttp2_maybe_complete_recv_initial_metadata,
     grpc_chttp2_maybe_complete_recv_trailing_metadata};
 
-static void force_client_rst_stream(grpc_exec_ctx* exec_ctx, void* sp,
-                                    grpc_error* error) {
+static void force_client_rst_stream(void* sp, grpc_error* error) {
   grpc_chttp2_stream* s = (grpc_chttp2_stream*)sp;
   grpc_chttp2_transport* t = s->t;
   if (!s->write_closed) {
     grpc_slice_buffer_add(
         &t->qbuf, grpc_chttp2_rst_stream_create(s->id, GRPC_HTTP2_NO_ERROR,
                                                 &s->stats.outgoing));
-    grpc_chttp2_initiate_write(exec_ctx, t,
-                               GRPC_CHTTP2_INITIATE_WRITE_FORCE_RST_STREAM);
-    grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, true, GRPC_ERROR_NONE);
+    grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_FORCE_RST_STREAM);
+    grpc_chttp2_mark_stream_closed(t, s, true, true, GRPC_ERROR_NONE);
   }
-  GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "final_rst");
+  GRPC_CHTTP2_STREAM_UNREF(s, "final_rst");
 }
 
-static void parse_stream_compression_md(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_transport* t,
+static void parse_stream_compression_md(grpc_chttp2_transport* t,
                                         grpc_chttp2_stream* s,
                                         grpc_metadata_batch* initial_metadata) {
   if (initial_metadata->idx.named.content_encoding == nullptr ||
@@ -1698,8 +1614,7 @@ static void parse_stream_compression_md(grpc_exec_ctx* exec_ctx,
   }
 }
 
-grpc_error* grpc_chttp2_header_parser_parse(grpc_exec_ctx* exec_ctx,
-                                            void* hpack_parser,
+grpc_error* grpc_chttp2_header_parser_parse(void* hpack_parser,
                                             grpc_chttp2_transport* t,
                                             grpc_chttp2_stream* s,
                                             grpc_slice slice, int is_last) {
@@ -1708,7 +1623,7 @@ grpc_error* grpc_chttp2_header_parser_parse(grpc_exec_ctx* exec_ctx,
   if (s != nullptr) {
     s->stats.incoming.header_bytes += GRPC_SLICE_LENGTH(slice);
   }
-  grpc_error* error = grpc_chttp2_hpack_parser_parse(exec_ctx, parser, slice);
+  grpc_error* error = grpc_chttp2_hpack_parser_parse(parser, slice);
   if (error != GRPC_ERROR_NONE) {
     GPR_TIMER_END("grpc_chttp2_hpack_parser_parse", 0);
     return error;
@@ -1731,12 +1646,11 @@ grpc_error* grpc_chttp2_header_parser_parse(grpc_exec_ctx* exec_ctx,
         /* Process stream compression md element if it exists */
         if (s->header_frames_received ==
             0) { /* Only acts on initial metadata */
-          parse_stream_compression_md(exec_ctx, t, s,
-                                      &s->metadata_buffer[0].batch);
+          parse_stream_compression_md(t, s, &s->metadata_buffer[0].batch);
         }
         s->published_metadata[s->header_frames_received] =
             GRPC_METADATA_PUBLISHED_FROM_WIRE;
-        maybe_complete_funcs[s->header_frames_received](exec_ctx, t, s);
+        maybe_complete_funcs[s->header_frames_received](t, s);
         s->header_frames_received++;
       }
       if (parser->is_eof) {
@@ -1747,13 +1661,11 @@ grpc_error* grpc_chttp2_header_parser_parse(grpc_exec_ctx* exec_ctx,
              and can avoid the extra write */
           GRPC_CHTTP2_STREAM_REF(s, "final_rst");
           GRPC_CLOSURE_SCHED(
-              exec_ctx,
               GRPC_CLOSURE_CREATE(force_client_rst_stream, s,
                                   grpc_combiner_finally_scheduler(t->combiner)),
               GRPC_ERROR_NONE);
         }
-        grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, false,
-                                       GRPC_ERROR_NONE);
+        grpc_chttp2_mark_stream_closed(t, s, true, false, GRPC_ERROR_NONE);
       }
     }
     parser->on_header = nullptr;
diff --git a/src/core/ext/transport/chttp2/transport/hpack_parser.h b/src/core/ext/transport/chttp2/transport/hpack_parser.h
index b4a2b14bdb..060bc5ce9d 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_parser.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_parser.h
@@ -30,8 +30,7 @@
 typedef struct grpc_chttp2_hpack_parser grpc_chttp2_hpack_parser;
 
 typedef grpc_error* (*grpc_chttp2_hpack_parser_state)(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_parser* p, const uint8_t* beg,
-    const uint8_t* end);
+    grpc_chttp2_hpack_parser* p, const uint8_t* beg, const uint8_t* end);
 
 typedef struct {
   bool copied;
@@ -47,7 +46,7 @@ typedef struct {
 
 struct grpc_chttp2_hpack_parser {
   /* user specified callback for each header output */
-  void (*on_header)(grpc_exec_ctx* exec_ctx, void* user_data, grpc_mdelem md);
+  void (*on_header)(void* user_data, grpc_mdelem md);
   void* on_header_user_data;
 
   grpc_error* last_error;
@@ -92,21 +91,17 @@ struct grpc_chttp2_hpack_parser {
   grpc_chttp2_hptbl table;
 };
 
-void grpc_chttp2_hpack_parser_init(grpc_exec_ctx* exec_ctx,
-                                   grpc_chttp2_hpack_parser* p);
-void grpc_chttp2_hpack_parser_destroy(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_hpack_parser* p);
+void grpc_chttp2_hpack_parser_init(grpc_chttp2_hpack_parser* p);
+void grpc_chttp2_hpack_parser_destroy(grpc_chttp2_hpack_parser* p);
 
 void grpc_chttp2_hpack_parser_set_has_priority(grpc_chttp2_hpack_parser* p);
 
-grpc_error* grpc_chttp2_hpack_parser_parse(grpc_exec_ctx* exec_ctx,
-                                           grpc_chttp2_hpack_parser* p,
+grpc_error* grpc_chttp2_hpack_parser_parse(grpc_chttp2_hpack_parser* p,
                                            grpc_slice slice);
 
 /* wraps grpc_chttp2_hpack_parser_parse to provide a frame level parser for
    the transport */
-grpc_error* grpc_chttp2_header_parser_parse(grpc_exec_ctx* exec_ctx,
-                                            void* hpack_parser,
+grpc_error* grpc_chttp2_header_parser_parse(void* hpack_parser,
                                             grpc_chttp2_transport* t,
                                             grpc_chttp2_stream* s,
                                             grpc_slice slice, int is_last);
diff --git a/src/core/ext/transport/chttp2/transport/hpack_table.cc b/src/core/ext/transport/chttp2/transport/hpack_table.cc
index 75b83b80b6..c325465daa 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_table.cc
+++ b/src/core/ext/transport/chttp2/transport/hpack_table.cc
@@ -165,7 +165,7 @@ static uint32_t entries_for_bytes(uint32_t bytes) {
          GRPC_CHTTP2_HPACK_ENTRY_OVERHEAD;
 }
 
-void grpc_chttp2_hptbl_init(grpc_exec_ctx* exec_ctx, grpc_chttp2_hptbl* tbl) {
+void grpc_chttp2_hptbl_init(grpc_chttp2_hptbl* tbl) {
   size_t i;
 
   memset(tbl, 0, sizeof(*tbl));
@@ -177,22 +177,19 @@ void grpc_chttp2_hptbl_init(grpc_exec_ctx* exec_ctx, grpc_chttp2_hptbl* tbl) {
   memset(tbl->ents, 0, sizeof(*tbl->ents) * tbl->cap_entries);
   for (i = 1; i <= GRPC_CHTTP2_LAST_STATIC_ENTRY; i++) {
     tbl->static_ents[i - 1] = grpc_mdelem_from_slices(
-        exec_ctx,
         grpc_slice_intern(grpc_slice_from_static_string(static_table[i].key)),
         grpc_slice_intern(
             grpc_slice_from_static_string(static_table[i].value)));
   }
 }
 
-void grpc_chttp2_hptbl_destroy(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hptbl* tbl) {
+void grpc_chttp2_hptbl_destroy(grpc_chttp2_hptbl* tbl) {
   size_t i;
   for (i = 0; i < GRPC_CHTTP2_LAST_STATIC_ENTRY; i++) {
-    GRPC_MDELEM_UNREF(exec_ctx, tbl->static_ents[i]);
+    GRPC_MDELEM_UNREF(tbl->static_ents[i]);
   }
   for (i = 0; i < tbl->num_ents; i++) {
-    GRPC_MDELEM_UNREF(exec_ctx,
-                      tbl->ents[(tbl->first_ent + i) % tbl->cap_entries]);
+    GRPC_MDELEM_UNREF(tbl->ents[(tbl->first_ent + i) % tbl->cap_entries]);
   }
   gpr_free(tbl->ents);
 }
@@ -215,7 +212,7 @@ grpc_mdelem grpc_chttp2_hptbl_lookup(const grpc_chttp2_hptbl* tbl,
 }
 
 /* Evict one element from the table */
-static void evict1(grpc_exec_ctx* exec_ctx, grpc_chttp2_hptbl* tbl) {
+static void evict1(grpc_chttp2_hptbl* tbl) {
   grpc_mdelem first_ent = tbl->ents[tbl->first_ent];
   size_t elem_bytes = GRPC_SLICE_LENGTH(GRPC_MDKEY(first_ent)) +
                       GRPC_SLICE_LENGTH(GRPC_MDVALUE(first_ent)) +
@@ -224,7 +221,7 @@ static void evict1(grpc_exec_ctx* exec_ctx, grpc_chttp2_hptbl* tbl) {
   tbl->mem_used -= (uint32_t)elem_bytes;
   tbl->first_ent = ((tbl->first_ent + 1) % tbl->cap_entries);
   tbl->num_ents--;
-  GRPC_MDELEM_UNREF(exec_ctx, first_ent);
+  GRPC_MDELEM_UNREF(first_ent);
 }
 
 static void rebuild_ents(grpc_chttp2_hptbl* tbl, uint32_t new_cap) {
@@ -240,8 +237,7 @@ static void rebuild_ents(grpc_chttp2_hptbl* tbl, uint32_t new_cap) {
   tbl->first_ent = 0;
 }
 
-void grpc_chttp2_hptbl_set_max_bytes(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hptbl* tbl,
+void grpc_chttp2_hptbl_set_max_bytes(grpc_chttp2_hptbl* tbl,
                                      uint32_t max_bytes) {
   if (tbl->max_bytes == max_bytes) {
     return;
@@ -250,13 +246,12 @@ void grpc_chttp2_hptbl_set_max_bytes(grpc_exec_ctx* exec_ctx,
     gpr_log(GPR_DEBUG, "Update hpack parser max size to %d", max_bytes);
   }
   while (tbl->mem_used > max_bytes) {
-    evict1(exec_ctx, tbl);
+    evict1(tbl);
   }
   tbl->max_bytes = max_bytes;
 }
 
-grpc_error* grpc_chttp2_hptbl_set_current_table_size(grpc_exec_ctx* exec_ctx,
-                                                     grpc_chttp2_hptbl* tbl,
+grpc_error* grpc_chttp2_hptbl_set_current_table_size(grpc_chttp2_hptbl* tbl,
                                                      uint32_t bytes) {
   if (tbl->current_table_bytes == bytes) {
     return GRPC_ERROR_NONE;
@@ -274,7 +269,7 @@ grpc_error* grpc_chttp2_hptbl_set_current_table_size(grpc_exec_ctx* exec_ctx,
     gpr_log(GPR_DEBUG, "Update hpack parser table size to %d", bytes);
   }
   while (tbl->mem_used > bytes) {
-    evict1(exec_ctx, tbl);
+    evict1(tbl);
   }
   tbl->current_table_bytes = bytes;
   tbl->max_entries = entries_for_bytes(bytes);
@@ -289,8 +284,7 @@ grpc_error* grpc_chttp2_hptbl_set_current_table_size(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_chttp2_hptbl_add(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_hptbl* tbl, grpc_mdelem md) {
+grpc_error* grpc_chttp2_hptbl_add(grpc_chttp2_hptbl* tbl, grpc_mdelem md) {
   /* determine how many bytes of buffer this entry represents */
   size_t elem_bytes = GRPC_SLICE_LENGTH(GRPC_MDKEY(md)) +
                       GRPC_SLICE_LENGTH(GRPC_MDVALUE(md)) +
@@ -320,14 +314,14 @@ grpc_error* grpc_chttp2_hptbl_add(grpc_exec_ctx* exec_ctx,
      * empty table.
      */
     while (tbl->num_ents) {
-      evict1(exec_ctx, tbl);
+      evict1(tbl);
     }
     return GRPC_ERROR_NONE;
   }
 
   /* evict entries to ensure no overflow */
   while (elem_bytes > (size_t)tbl->current_table_bytes - tbl->mem_used) {
-    evict1(exec_ctx, tbl);
+    evict1(tbl);
   }
 
   /* copy the finalized entry in */
diff --git a/src/core/ext/transport/chttp2/transport/hpack_table.h b/src/core/ext/transport/chttp2/transport/hpack_table.h
index aed7b13f0b..189ad1c697 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_table.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_table.h
@@ -69,21 +69,18 @@ typedef struct {
 } grpc_chttp2_hptbl;
 
 /* initialize a hpack table */
-void grpc_chttp2_hptbl_init(grpc_exec_ctx* exec_ctx, grpc_chttp2_hptbl* tbl);
-void grpc_chttp2_hptbl_destroy(grpc_exec_ctx* exec_ctx, grpc_chttp2_hptbl* tbl);
-void grpc_chttp2_hptbl_set_max_bytes(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hptbl* tbl,
+void grpc_chttp2_hptbl_init(grpc_chttp2_hptbl* tbl);
+void grpc_chttp2_hptbl_destroy(grpc_chttp2_hptbl* tbl);
+void grpc_chttp2_hptbl_set_max_bytes(grpc_chttp2_hptbl* tbl,
                                      uint32_t max_bytes);
-grpc_error* grpc_chttp2_hptbl_set_current_table_size(grpc_exec_ctx* exec_ctx,
-                                                     grpc_chttp2_hptbl* tbl,
+grpc_error* grpc_chttp2_hptbl_set_current_table_size(grpc_chttp2_hptbl* tbl,
                                                      uint32_t bytes);
 
 /* lookup a table entry based on its hpack index */
 grpc_mdelem grpc_chttp2_hptbl_lookup(const grpc_chttp2_hptbl* tbl,
                                      uint32_t index);
 /* add a table entry to the index */
-grpc_error* grpc_chttp2_hptbl_add(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_hptbl* tbl,
+grpc_error* grpc_chttp2_hptbl_add(grpc_chttp2_hptbl* tbl,
                                   grpc_mdelem md) GRPC_MUST_USE_RESULT;
 /* Find a key/value pair in the table... returns the index in the table of the
    most similar entry, or 0 if the value was not found */
diff --git a/src/core/ext/transport/chttp2/transport/incoming_metadata.cc b/src/core/ext/transport/chttp2/transport/incoming_metadata.cc
index 4461f8c12c..ef0c9ed230 100644
--- a/src/core/ext/transport/chttp2/transport/incoming_metadata.cc
+++ b/src/core/ext/transport/chttp2/transport/incoming_metadata.cc
@@ -33,33 +33,31 @@ void grpc_chttp2_incoming_metadata_buffer_init(
 }
 
 void grpc_chttp2_incoming_metadata_buffer_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer) {
-  grpc_metadata_batch_destroy(exec_ctx, &buffer->batch);
+    grpc_chttp2_incoming_metadata_buffer* buffer) {
+  grpc_metadata_batch_destroy(&buffer->batch);
 }
 
 grpc_error* grpc_chttp2_incoming_metadata_buffer_add(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer,
-    grpc_mdelem elem) {
+    grpc_chttp2_incoming_metadata_buffer* buffer, grpc_mdelem elem) {
   buffer->size += GRPC_MDELEM_LENGTH(elem);
   return grpc_metadata_batch_add_tail(
-      exec_ctx, &buffer->batch,
+      &buffer->batch,
       (grpc_linked_mdelem*)gpr_arena_alloc(buffer->arena,
                                            sizeof(grpc_linked_mdelem)),
       elem);
 }
 
 grpc_error* grpc_chttp2_incoming_metadata_buffer_replace_or_add(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer,
-    grpc_mdelem elem) {
+    grpc_chttp2_incoming_metadata_buffer* buffer, grpc_mdelem elem) {
   for (grpc_linked_mdelem* l = buffer->batch.list.head; l != nullptr;
        l = l->next) {
     if (grpc_slice_eq(GRPC_MDKEY(l->md), GRPC_MDKEY(elem))) {
-      GRPC_MDELEM_UNREF(exec_ctx, l->md);
+      GRPC_MDELEM_UNREF(l->md);
       l->md = elem;
       return GRPC_ERROR_NONE;
     }
   }
-  return grpc_chttp2_incoming_metadata_buffer_add(exec_ctx, buffer, elem);
+  return grpc_chttp2_incoming_metadata_buffer_add(buffer, elem);
 }
 
 void grpc_chttp2_incoming_metadata_buffer_set_deadline(
@@ -68,8 +66,7 @@ void grpc_chttp2_incoming_metadata_buffer_set_deadline(
 }
 
 void grpc_chttp2_incoming_metadata_buffer_publish(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer,
-    grpc_metadata_batch* batch) {
+    grpc_chttp2_incoming_metadata_buffer* buffer, grpc_metadata_batch* batch) {
   *batch = buffer->batch;
   grpc_metadata_batch_init(&buffer->batch);
 }
diff --git a/src/core/ext/transport/chttp2/transport/incoming_metadata.h b/src/core/ext/transport/chttp2/transport/incoming_metadata.h
index 6f2b81ef6c..b84cd484c4 100644
--- a/src/core/ext/transport/chttp2/transport/incoming_metadata.h
+++ b/src/core/ext/transport/chttp2/transport/incoming_metadata.h
@@ -31,16 +31,15 @@ typedef struct {
 void grpc_chttp2_incoming_metadata_buffer_init(
     grpc_chttp2_incoming_metadata_buffer* buffer, gpr_arena* arena);
 void grpc_chttp2_incoming_metadata_buffer_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer);
+    grpc_chttp2_incoming_metadata_buffer* buffer);
 void grpc_chttp2_incoming_metadata_buffer_publish(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer,
-    grpc_metadata_batch* batch);
+    grpc_chttp2_incoming_metadata_buffer* buffer, grpc_metadata_batch* batch);
 
 grpc_error* grpc_chttp2_incoming_metadata_buffer_add(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer,
+    grpc_chttp2_incoming_metadata_buffer* buffer,
     grpc_mdelem elem) GRPC_MUST_USE_RESULT;
 grpc_error* grpc_chttp2_incoming_metadata_buffer_replace_or_add(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer,
+    grpc_chttp2_incoming_metadata_buffer* buffer,
     grpc_mdelem elem) GRPC_MUST_USE_RESULT;
 void grpc_chttp2_incoming_metadata_buffer_set_deadline(
     grpc_chttp2_incoming_metadata_buffer* buffer, grpc_millis deadline);
diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h
index f6fd6795d0..932f5ba83d 100644
--- a/src/core/ext/transport/chttp2/transport/internal.h
+++ b/src/core/ext/transport/chttp2/transport/internal.h
@@ -282,8 +282,8 @@ struct grpc_chttp2_transport {
 
   struct {
     /* accept stream callback */
-    void (*accept_stream)(grpc_exec_ctx* exec_ctx, void* user_data,
-                          grpc_transport* transport, const void* server_data);
+    void (*accept_stream)(void* user_data, grpc_transport* transport,
+                          const void* server_data);
     void* accept_stream_user_data;
 
     /** connectivity tracking */
@@ -371,9 +371,8 @@ struct grpc_chttp2_transport {
   /* active parser */
   void* parser_data;
   grpc_chttp2_stream* incoming_stream;
-  grpc_error* (*parser)(grpc_exec_ctx* exec_ctx, void* parser_user_data,
-                        grpc_chttp2_transport* t, grpc_chttp2_stream* s,
-                        grpc_slice slice, int is_last);
+  grpc_error* (*parser)(void* parser_user_data, grpc_chttp2_transport* t,
+                        grpc_chttp2_stream* s, grpc_slice slice, int is_last);
 
   grpc_chttp2_write_cb* write_cb_pool;
 
@@ -571,8 +570,7 @@ struct grpc_chttp2_stream {
 
     The actual call chain is documented in the implementation of this function.
     */
-void grpc_chttp2_initiate_write(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_transport* t,
+void grpc_chttp2_initiate_write(grpc_chttp2_transport* t,
                                 grpc_chttp2_initiate_write_reason reason);
 
 typedef struct {
@@ -585,14 +583,12 @@ typedef struct {
 } grpc_chttp2_begin_write_result;
 
 grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t);
-void grpc_chttp2_end_write(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                           grpc_error* error);
+    grpc_chttp2_transport* t);
+void grpc_chttp2_end_write(grpc_chttp2_transport* t, grpc_error* error);
 
 /** Process one slice of incoming data; return 1 if the connection is still
     viable after reading, or 0 if the connection should be torn down */
-grpc_error* grpc_chttp2_perform_read(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+grpc_error* grpc_chttp2_perform_read(grpc_chttp2_transport* t,
                                      grpc_slice slice);
 
 bool grpc_chttp2_list_add_writable_stream(grpc_chttp2_transport* t,
@@ -640,27 +636,23 @@ bool grpc_chttp2_list_remove_stalled_by_stream(grpc_chttp2_transport* t,
 
 // Takes in a flow control action and performs all the needed operations.
 void grpc_chttp2_act_on_flowctl_action(
-    grpc_exec_ctx* exec_ctx, const grpc_core::chttp2::FlowControlAction& action,
+    const grpc_core::chttp2::FlowControlAction& action,
     grpc_chttp2_transport* t, grpc_chttp2_stream* s);
 
 /********* End of Flow Control ***************/
 
 grpc_chttp2_stream* grpc_chttp2_parsing_lookup_stream(grpc_chttp2_transport* t,
                                                       uint32_t id);
-grpc_chttp2_stream* grpc_chttp2_parsing_accept_stream(grpc_exec_ctx* exec_ctx,
-                                                      grpc_chttp2_transport* t,
+grpc_chttp2_stream* grpc_chttp2_parsing_accept_stream(grpc_chttp2_transport* t,
                                                       uint32_t id);
 
-void grpc_chttp2_add_incoming_goaway(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+void grpc_chttp2_add_incoming_goaway(grpc_chttp2_transport* t,
                                      uint32_t goaway_error,
                                      grpc_slice goaway_text);
 
-void grpc_chttp2_parsing_become_skip_parser(grpc_exec_ctx* exec_ctx,
-                                            grpc_chttp2_transport* t);
+void grpc_chttp2_parsing_become_skip_parser(grpc_chttp2_transport* t);
 
-void grpc_chttp2_complete_closure_step(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_transport* t,
+void grpc_chttp2_complete_closure_step(grpc_chttp2_transport* t,
                                        grpc_chttp2_stream* s,
                                        grpc_closure** pclosure,
                                        grpc_error* error, const char* desc);
@@ -681,94 +673,80 @@ void grpc_chttp2_complete_closure_step(grpc_exec_ctx* exec_ctx,
   else                               \
     stmt
 
-void grpc_chttp2_fake_status(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
+void grpc_chttp2_fake_status(grpc_chttp2_transport* t,
                              grpc_chttp2_stream* stream, grpc_error* error);
-void grpc_chttp2_mark_stream_closed(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_transport* t,
+void grpc_chttp2_mark_stream_closed(grpc_chttp2_transport* t,
                                     grpc_chttp2_stream* s, int close_reads,
                                     int close_writes, grpc_error* error);
-void grpc_chttp2_start_writing(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_transport* t);
+void grpc_chttp2_start_writing(grpc_chttp2_transport* t);
 
 #ifndef NDEBUG
 #define GRPC_CHTTP2_STREAM_REF(stream, reason) \
   grpc_chttp2_stream_ref(stream, reason)
-#define GRPC_CHTTP2_STREAM_UNREF(exec_ctx, stream, reason) \
-  grpc_chttp2_stream_unref(exec_ctx, stream, reason)
+#define GRPC_CHTTP2_STREAM_UNREF(stream, reason) \
+  grpc_chttp2_stream_unref(stream, reason)
 void grpc_chttp2_stream_ref(grpc_chttp2_stream* s, const char* reason);
-void grpc_chttp2_stream_unref(grpc_exec_ctx* exec_ctx, grpc_chttp2_stream* s,
-                              const char* reason);
+void grpc_chttp2_stream_unref(grpc_chttp2_stream* s, const char* reason);
 #else
 #define GRPC_CHTTP2_STREAM_REF(stream, reason) grpc_chttp2_stream_ref(stream)
-#define GRPC_CHTTP2_STREAM_UNREF(exec_ctx, stream, reason) \
-  grpc_chttp2_stream_unref(exec_ctx, stream)
+#define GRPC_CHTTP2_STREAM_UNREF(stream, reason) \
+  grpc_chttp2_stream_unref(stream)
 void grpc_chttp2_stream_ref(grpc_chttp2_stream* s);
-void grpc_chttp2_stream_unref(grpc_exec_ctx* exec_ctx, grpc_chttp2_stream* s);
+void grpc_chttp2_stream_unref(grpc_chttp2_stream* s);
 #endif
 
 #ifndef NDEBUG
 #define GRPC_CHTTP2_REF_TRANSPORT(t, r) \
   grpc_chttp2_ref_transport(t, r, __FILE__, __LINE__)
-#define GRPC_CHTTP2_UNREF_TRANSPORT(cl, t, r) \
-  grpc_chttp2_unref_transport(cl, t, r, __FILE__, __LINE__)
-void grpc_chttp2_unref_transport(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t, const char* reason,
+#define GRPC_CHTTP2_UNREF_TRANSPORT(t, r) \
+  grpc_chttp2_unref_transport(t, r, __FILE__, __LINE__)
+void grpc_chttp2_unref_transport(grpc_chttp2_transport* t, const char* reason,
                                  const char* file, int line);
 void grpc_chttp2_ref_transport(grpc_chttp2_transport* t, const char* reason,
                                const char* file, int line);
 #else
 #define GRPC_CHTTP2_REF_TRANSPORT(t, r) grpc_chttp2_ref_transport(t)
-#define GRPC_CHTTP2_UNREF_TRANSPORT(cl, t, r) grpc_chttp2_unref_transport(cl, t)
-void grpc_chttp2_unref_transport(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t);
+#define GRPC_CHTTP2_UNREF_TRANSPORT(t, r) grpc_chttp2_unref_transport(t)
+void grpc_chttp2_unref_transport(grpc_chttp2_transport* t);
 void grpc_chttp2_ref_transport(grpc_chttp2_transport* t);
 #endif
 
 grpc_chttp2_incoming_byte_stream* grpc_chttp2_incoming_byte_stream_create(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t, grpc_chttp2_stream* s,
-    uint32_t frame_size, uint32_t flags);
+    grpc_chttp2_transport* t, grpc_chttp2_stream* s, uint32_t frame_size,
+    uint32_t flags);
 grpc_error* grpc_chttp2_incoming_byte_stream_push(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_slice slice, grpc_slice* slice_out);
+    grpc_chttp2_incoming_byte_stream* bs, grpc_slice slice,
+    grpc_slice* slice_out);
 grpc_error* grpc_chttp2_incoming_byte_stream_finished(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_error* error, bool reset_on_error);
+    grpc_chttp2_incoming_byte_stream* bs, grpc_error* error,
+    bool reset_on_error);
 void grpc_chttp2_incoming_byte_stream_notify(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_error* error);
+    grpc_chttp2_incoming_byte_stream* bs, grpc_error* error);
 
-void grpc_chttp2_ack_ping(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                          uint64_t id);
+void grpc_chttp2_ack_ping(grpc_chttp2_transport* t, uint64_t id);
 
 /** Add a new ping strike to ping_recv_state.ping_strikes. If
     ping_recv_state.ping_strikes > ping_policy.max_ping_strikes, it sends GOAWAY
     with error code ENHANCE_YOUR_CALM and additional debug data resembling
     "too_many_pings" followed by immediately closing the connection. */
-void grpc_chttp2_add_ping_strike(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t);
+void grpc_chttp2_add_ping_strike(grpc_chttp2_transport* t);
 
 /** add a ref to the stream and add it to the writable list;
     ref will be dropped in writing.c */
-void grpc_chttp2_mark_stream_writable(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_transport* t,
+void grpc_chttp2_mark_stream_writable(grpc_chttp2_transport* t,
                                       grpc_chttp2_stream* s);
 
-void grpc_chttp2_cancel_stream(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+void grpc_chttp2_cancel_stream(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
                                grpc_error* due_to_error);
 
-void grpc_chttp2_maybe_complete_recv_initial_metadata(grpc_exec_ctx* exec_ctx,
-                                                      grpc_chttp2_transport* t,
+void grpc_chttp2_maybe_complete_recv_initial_metadata(grpc_chttp2_transport* t,
                                                       grpc_chttp2_stream* s);
-void grpc_chttp2_maybe_complete_recv_message(grpc_exec_ctx* exec_ctx,
-                                             grpc_chttp2_transport* t,
+void grpc_chttp2_maybe_complete_recv_message(grpc_chttp2_transport* t,
                                              grpc_chttp2_stream* s);
-void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_exec_ctx* exec_ctx,
-                                                       grpc_chttp2_transport* t,
+void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_chttp2_transport* t,
                                                        grpc_chttp2_stream* s);
 
-void grpc_chttp2_fail_pending_writes(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+void grpc_chttp2_fail_pending_writes(grpc_chttp2_transport* t,
                                      grpc_chttp2_stream* s, grpc_error* error);
 
 /** Set the default keepalive configurations, must only be called at
diff --git a/src/core/ext/transport/chttp2/transport/parsing.cc b/src/core/ext/transport/chttp2/transport/parsing.cc
index 46ec3fbaa6..a56f89cc75 100644
--- a/src/core/ext/transport/chttp2/transport/parsing.cc
+++ b/src/core/ext/transport/chttp2/transport/parsing.cc
@@ -31,33 +31,22 @@
 #include "src/core/lib/transport/status_conversion.h"
 #include "src/core/lib/transport/timeout_encoding.h"
 
-static grpc_error* init_frame_parser(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t);
-static grpc_error* init_header_frame_parser(grpc_exec_ctx* exec_ctx,
-                                            grpc_chttp2_transport* t,
+static grpc_error* init_frame_parser(grpc_chttp2_transport* t);
+static grpc_error* init_header_frame_parser(grpc_chttp2_transport* t,
                                             int is_continuation);
-static grpc_error* init_data_frame_parser(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t);
-static grpc_error* init_rst_stream_parser(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t);
-static grpc_error* init_settings_frame_parser(grpc_exec_ctx* exec_ctx,
-                                              grpc_chttp2_transport* t);
-static grpc_error* init_window_update_frame_parser(grpc_exec_ctx* exec_ctx,
-                                                   grpc_chttp2_transport* t);
-static grpc_error* init_ping_parser(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_transport* t);
-static grpc_error* init_goaway_parser(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_transport* t);
-static grpc_error* init_skip_frame_parser(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t,
+static grpc_error* init_data_frame_parser(grpc_chttp2_transport* t);
+static grpc_error* init_rst_stream_parser(grpc_chttp2_transport* t);
+static grpc_error* init_settings_frame_parser(grpc_chttp2_transport* t);
+static grpc_error* init_window_update_frame_parser(grpc_chttp2_transport* t);
+static grpc_error* init_ping_parser(grpc_chttp2_transport* t);
+static grpc_error* init_goaway_parser(grpc_chttp2_transport* t);
+static grpc_error* init_skip_frame_parser(grpc_chttp2_transport* t,
                                           int is_header);
 
-static grpc_error* parse_frame_slice(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t, grpc_slice slice,
+static grpc_error* parse_frame_slice(grpc_chttp2_transport* t, grpc_slice slice,
                                      int is_last);
 
-grpc_error* grpc_chttp2_perform_read(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+grpc_error* grpc_chttp2_perform_read(grpc_chttp2_transport* t,
                                      grpc_slice slice) {
   uint8_t* beg = GRPC_SLICE_START_PTR(slice);
   uint8_t* end = GRPC_SLICE_END_PTR(slice);
@@ -182,12 +171,12 @@ grpc_error* grpc_chttp2_perform_read(grpc_exec_ctx* exec_ctx,
       GPR_ASSERT(cur < end);
       t->incoming_stream_id |= ((uint32_t)*cur);
       t->deframe_state = GRPC_DTS_FRAME;
-      err = init_frame_parser(exec_ctx, t);
+      err = init_frame_parser(t);
       if (err != GRPC_ERROR_NONE) {
         return err;
       }
       if (t->incoming_frame_size == 0) {
-        err = parse_frame_slice(exec_ctx, t, grpc_empty_slice(), 1);
+        err = parse_frame_slice(t, grpc_empty_slice(), 1);
         if (err != GRPC_ERROR_NONE) {
           return err;
         }
@@ -217,7 +206,7 @@ grpc_error* grpc_chttp2_perform_read(grpc_exec_ctx* exec_ctx,
       GPR_ASSERT(cur < end);
       if ((uint32_t)(end - cur) == t->incoming_frame_size) {
         err =
-            parse_frame_slice(exec_ctx, t,
+            parse_frame_slice(t,
                               grpc_slice_sub_no_ref(slice, (size_t)(cur - beg),
                                                     (size_t)(end - beg)),
                               1);
@@ -230,7 +219,7 @@ grpc_error* grpc_chttp2_perform_read(grpc_exec_ctx* exec_ctx,
       } else if ((uint32_t)(end - cur) > t->incoming_frame_size) {
         size_t cur_offset = (size_t)(cur - beg);
         err = parse_frame_slice(
-            exec_ctx, t,
+            t,
             grpc_slice_sub_no_ref(slice, cur_offset,
                                   cur_offset + t->incoming_frame_size),
             1);
@@ -242,7 +231,7 @@ grpc_error* grpc_chttp2_perform_read(grpc_exec_ctx* exec_ctx,
         goto dts_fh_0; /* loop */
       } else {
         err =
-            parse_frame_slice(exec_ctx, t,
+            parse_frame_slice(t,
                               grpc_slice_sub_no_ref(slice, (size_t)(cur - beg),
                                                     (size_t)(end - beg)),
                               0);
@@ -258,8 +247,7 @@ grpc_error* grpc_chttp2_perform_read(grpc_exec_ctx* exec_ctx,
   GPR_UNREACHABLE_CODE(return nullptr);
 }
 
-static grpc_error* init_frame_parser(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t) {
+static grpc_error* init_frame_parser(grpc_chttp2_transport* t) {
   if (t->is_first_frame &&
       t->incoming_frame_type != GRPC_CHTTP2_FRAME_SETTINGS) {
     char* msg;
@@ -291,46 +279,43 @@ static grpc_error* init_frame_parser(grpc_exec_ctx* exec_ctx,
       gpr_free(msg);
       return err;
     }
-    return init_header_frame_parser(exec_ctx, t, 1);
+    return init_header_frame_parser(t, 1);
   }
   switch (t->incoming_frame_type) {
     case GRPC_CHTTP2_FRAME_DATA:
-      return init_data_frame_parser(exec_ctx, t);
+      return init_data_frame_parser(t);
     case GRPC_CHTTP2_FRAME_HEADER:
-      return init_header_frame_parser(exec_ctx, t, 0);
+      return init_header_frame_parser(t, 0);
     case GRPC_CHTTP2_FRAME_CONTINUATION:
       return GRPC_ERROR_CREATE_FROM_STATIC_STRING(
           "Unexpected CONTINUATION frame");
     case GRPC_CHTTP2_FRAME_RST_STREAM:
-      return init_rst_stream_parser(exec_ctx, t);
+      return init_rst_stream_parser(t);
     case GRPC_CHTTP2_FRAME_SETTINGS:
-      return init_settings_frame_parser(exec_ctx, t);
+      return init_settings_frame_parser(t);
     case GRPC_CHTTP2_FRAME_WINDOW_UPDATE:
-      return init_window_update_frame_parser(exec_ctx, t);
+      return init_window_update_frame_parser(t);
     case GRPC_CHTTP2_FRAME_PING:
-      return init_ping_parser(exec_ctx, t);
+      return init_ping_parser(t);
     case GRPC_CHTTP2_FRAME_GOAWAY:
-      return init_goaway_parser(exec_ctx, t);
+      return init_goaway_parser(t);
     default:
       if (grpc_http_trace.enabled()) {
         gpr_log(GPR_ERROR, "Unknown frame type %02x", t->incoming_frame_type);
       }
-      return init_skip_frame_parser(exec_ctx, t, 0);
+      return init_skip_frame_parser(t, 0);
   }
 }
 
-static grpc_error* skip_parser(grpc_exec_ctx* exec_ctx, void* parser,
-                               grpc_chttp2_transport* t, grpc_chttp2_stream* s,
-                               grpc_slice slice, int is_last) {
+static grpc_error* skip_parser(void* parser, grpc_chttp2_transport* t,
+                               grpc_chttp2_stream* s, grpc_slice slice,
+                               int is_last) {
   return GRPC_ERROR_NONE;
 }
 
-static void skip_header(grpc_exec_ctx* exec_ctx, void* tp, grpc_mdelem md) {
-  GRPC_MDELEM_UNREF(exec_ctx, md);
-}
+static void skip_header(void* tp, grpc_mdelem md) { GRPC_MDELEM_UNREF(md); }
 
-static grpc_error* init_skip_frame_parser(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t,
+static grpc_error* init_skip_frame_parser(grpc_chttp2_transport* t,
                                           int is_header) {
   if (is_header) {
     uint8_t is_eoh = t->expect_continuation_stream_id != 0;
@@ -346,14 +331,11 @@ static grpc_error* init_skip_frame_parser(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-void grpc_chttp2_parsing_become_skip_parser(grpc_exec_ctx* exec_ctx,
-                                            grpc_chttp2_transport* t) {
-  init_skip_frame_parser(exec_ctx, t,
-                         t->parser == grpc_chttp2_header_parser_parse);
+void grpc_chttp2_parsing_become_skip_parser(grpc_chttp2_transport* t) {
+  init_skip_frame_parser(t, t->parser == grpc_chttp2_header_parser_parse);
 }
 
-static grpc_error* init_data_frame_parser(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t) {
+static grpc_error* init_data_frame_parser(grpc_chttp2_transport* t) {
   grpc_chttp2_stream* s =
       grpc_chttp2_parsing_lookup_stream(t, t->incoming_stream_id);
   grpc_error* err = GRPC_ERROR_NONE;
@@ -365,17 +347,17 @@ static grpc_error* init_data_frame_parser(grpc_exec_ctx* exec_ctx,
     err = s->flow_control->RecvData(t->incoming_frame_size);
     action = s->flow_control->MakeAction();
   }
-  grpc_chttp2_act_on_flowctl_action(exec_ctx, action, t, s);
+  grpc_chttp2_act_on_flowctl_action(action, t, s);
   if (err != GRPC_ERROR_NONE) {
     goto error_handler;
   }
   if (s == nullptr) {
-    return init_skip_frame_parser(exec_ctx, t, 0);
+    return init_skip_frame_parser(t, 0);
   }
   s->received_bytes += t->incoming_frame_size;
   s->stats.incoming.framing_bytes += 9;
   if (err == GRPC_ERROR_NONE && s->read_closed) {
-    return init_skip_frame_parser(exec_ctx, t, 0);
+    return init_skip_frame_parser(t, 0);
   }
   if (err == GRPC_ERROR_NONE) {
     err = grpc_chttp2_data_parser_begin_frame(
@@ -394,13 +376,13 @@ error_handler:
   } else if (grpc_error_get_int(err, GRPC_ERROR_INT_STREAM_ID, nullptr)) {
     /* handle stream errors by closing the stream */
     if (s != nullptr) {
-      grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, false, err);
+      grpc_chttp2_mark_stream_closed(t, s, true, false, err);
     }
     grpc_slice_buffer_add(
         &t->qbuf, grpc_chttp2_rst_stream_create(t->incoming_stream_id,
                                                 GRPC_HTTP2_PROTOCOL_ERROR,
                                                 &s->stats.outgoing));
-    return init_skip_frame_parser(exec_ctx, t, 0);
+    return init_skip_frame_parser(t, 0);
   } else {
     return err;
   }
@@ -408,8 +390,7 @@ error_handler:
 
 static void free_timeout(void* p) { gpr_free(p); }
 
-static void on_initial_header(grpc_exec_ctx* exec_ctx, void* tp,
-                              grpc_mdelem md) {
+static void on_initial_header(void* tp, grpc_mdelem md) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   grpc_chttp2_stream* s = t->incoming_stream;
 
@@ -455,9 +436,9 @@ static void on_initial_header(grpc_exec_ctx* exec_ctx, void* tp,
     }
     if (timeout != GRPC_MILLIS_INF_FUTURE) {
       grpc_chttp2_incoming_metadata_buffer_set_deadline(
-          &s->metadata_buffer[0], grpc_exec_ctx_now(exec_ctx) + timeout);
+          &s->metadata_buffer[0], grpc_core::ExecCtx::Get()->Now() + timeout);
     }
-    GRPC_MDELEM_UNREF(exec_ctx, md);
+    GRPC_MDELEM_UNREF(md);
   } else {
     const size_t new_size = s->metadata_buffer[0].size + GRPC_MDELEM_LENGTH(md);
     const size_t metadata_size_limit =
@@ -469,22 +450,22 @@ static void on_initial_header(grpc_exec_ctx* exec_ctx, void* tp,
               " vs. %" PRIuPTR ")",
               new_size, metadata_size_limit);
       grpc_chttp2_cancel_stream(
-          exec_ctx, t, s,
+          t, s,
           grpc_error_set_int(
               GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                   "received initial metadata size exceeds limit"),
               GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_RESOURCE_EXHAUSTED));
-      grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
+      grpc_chttp2_parsing_become_skip_parser(t);
       s->seen_error = true;
-      GRPC_MDELEM_UNREF(exec_ctx, md);
+      GRPC_MDELEM_UNREF(md);
     } else {
-      grpc_error* error = grpc_chttp2_incoming_metadata_buffer_add(
-          exec_ctx, &s->metadata_buffer[0], md);
+      grpc_error* error =
+          grpc_chttp2_incoming_metadata_buffer_add(&s->metadata_buffer[0], md);
       if (error != GRPC_ERROR_NONE) {
-        grpc_chttp2_cancel_stream(exec_ctx, t, s, error);
-        grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
+        grpc_chttp2_cancel_stream(t, s, error);
+        grpc_chttp2_parsing_become_skip_parser(t);
         s->seen_error = true;
-        GRPC_MDELEM_UNREF(exec_ctx, md);
+        GRPC_MDELEM_UNREF(md);
       }
     }
   }
@@ -492,8 +473,7 @@ static void on_initial_header(grpc_exec_ctx* exec_ctx, void* tp,
   GPR_TIMER_END("on_initial_header", 0);
 }
 
-static void on_trailing_header(grpc_exec_ctx* exec_ctx, void* tp,
-                               grpc_mdelem md) {
+static void on_trailing_header(void* tp, grpc_mdelem md) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   grpc_chttp2_stream* s = t->incoming_stream;
 
@@ -527,30 +507,29 @@ static void on_trailing_header(grpc_exec_ctx* exec_ctx, void* tp,
             " vs. %" PRIuPTR ")",
             new_size, metadata_size_limit);
     grpc_chttp2_cancel_stream(
-        exec_ctx, t, s,
+        t, s,
         grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                                "received trailing metadata size exceeds limit"),
                            GRPC_ERROR_INT_GRPC_STATUS,
                            GRPC_STATUS_RESOURCE_EXHAUSTED));
-    grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
+    grpc_chttp2_parsing_become_skip_parser(t);
     s->seen_error = true;
-    GRPC_MDELEM_UNREF(exec_ctx, md);
+    GRPC_MDELEM_UNREF(md);
   } else {
-    grpc_error* error = grpc_chttp2_incoming_metadata_buffer_add(
-        exec_ctx, &s->metadata_buffer[1], md);
+    grpc_error* error =
+        grpc_chttp2_incoming_metadata_buffer_add(&s->metadata_buffer[1], md);
     if (error != GRPC_ERROR_NONE) {
-      grpc_chttp2_cancel_stream(exec_ctx, t, s, error);
-      grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
+      grpc_chttp2_cancel_stream(t, s, error);
+      grpc_chttp2_parsing_become_skip_parser(t);
       s->seen_error = true;
-      GRPC_MDELEM_UNREF(exec_ctx, md);
+      GRPC_MDELEM_UNREF(md);
     }
   }
 
   GPR_TIMER_END("on_trailing_header", 0);
 }
 
-static grpc_error* init_header_frame_parser(grpc_exec_ctx* exec_ctx,
-                                            grpc_chttp2_transport* t,
+static grpc_error* init_header_frame_parser(grpc_chttp2_transport* t,
                                             int is_continuation) {
   uint8_t is_eoh =
       (t->incoming_frame_flags & GRPC_CHTTP2_DATA_FLAG_END_HEADERS) != 0;
@@ -580,7 +559,7 @@ static grpc_error* init_header_frame_parser(grpc_exec_ctx* exec_ctx,
       GRPC_CHTTP2_IF_TRACING(
           gpr_log(GPR_ERROR,
                   "grpc_chttp2_stream disbanded before CONTINUATION received"));
-      return init_skip_frame_parser(exec_ctx, t, 1);
+      return init_skip_frame_parser(t, 1);
     }
     if (t->is_client) {
       if ((t->incoming_stream_id & 1) &&
@@ -590,7 +569,7 @@ static grpc_error* init_header_frame_parser(grpc_exec_ctx* exec_ctx,
         GRPC_CHTTP2_IF_TRACING(gpr_log(
             GPR_ERROR, "ignoring new grpc_chttp2_stream creation on client"));
       }
-      grpc_error* err = init_skip_frame_parser(exec_ctx, t, 1);
+      grpc_error* err = init_skip_frame_parser(t, 1);
       if (t->incoming_frame_flags & GRPC_CHTTP2_FLAG_HAS_PRIORITY) {
         grpc_chttp2_hpack_parser_set_has_priority(&t->hpack_parser);
       }
@@ -602,13 +581,13 @@ static grpc_error* init_header_frame_parser(grpc_exec_ctx* exec_ctx,
           "last grpc_chttp2_stream "
           "id=%d, new grpc_chttp2_stream id=%d",
           t->last_new_stream_id, t->incoming_stream_id));
-      return init_skip_frame_parser(exec_ctx, t, 1);
+      return init_skip_frame_parser(t, 1);
     } else if ((t->incoming_stream_id & 1) == 0) {
       GRPC_CHTTP2_IF_TRACING(gpr_log(
           GPR_ERROR,
           "ignoring grpc_chttp2_stream with non-client generated index %d",
           t->incoming_stream_id));
-      return init_skip_frame_parser(exec_ctx, t, 1);
+      return init_skip_frame_parser(t, 1);
     } else if (grpc_chttp2_stream_map_size(&t->stream_map) >=
                t->settings[GRPC_ACKED_SETTINGS]
                           [GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS]) {
@@ -616,11 +595,11 @@ static grpc_error* init_header_frame_parser(grpc_exec_ctx* exec_ctx,
     }
     t->last_new_stream_id = t->incoming_stream_id;
     s = t->incoming_stream =
-        grpc_chttp2_parsing_accept_stream(exec_ctx, t, t->incoming_stream_id);
+        grpc_chttp2_parsing_accept_stream(t, t->incoming_stream_id);
     if (s == nullptr) {
       GRPC_CHTTP2_IF_TRACING(
           gpr_log(GPR_ERROR, "grpc_chttp2_stream not accepted"));
-      return init_skip_frame_parser(exec_ctx, t, 1);
+      return init_skip_frame_parser(t, 1);
     }
   } else {
     t->incoming_stream = s;
@@ -631,7 +610,7 @@ static grpc_error* init_header_frame_parser(grpc_exec_ctx* exec_ctx,
     GRPC_CHTTP2_IF_TRACING(gpr_log(
         GPR_ERROR, "skipping already closed grpc_chttp2_stream header"));
     t->incoming_stream = nullptr;
-    return init_skip_frame_parser(exec_ctx, t, 1);
+    return init_skip_frame_parser(t, 1);
   }
   t->parser = grpc_chttp2_header_parser_parse;
   t->parser_data = &t->hpack_parser;
@@ -656,7 +635,7 @@ static grpc_error* init_header_frame_parser(grpc_exec_ctx* exec_ctx,
       break;
     case 2:
       gpr_log(GPR_ERROR, "too many header frames received");
-      return init_skip_frame_parser(exec_ctx, t, 1);
+      return init_skip_frame_parser(t, 1);
   }
   t->hpack_parser.on_header_user_data = t;
   t->hpack_parser.is_boundary = is_eoh;
@@ -668,8 +647,7 @@ static grpc_error* init_header_frame_parser(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* init_window_update_frame_parser(grpc_exec_ctx* exec_ctx,
-                                                   grpc_chttp2_transport* t) {
+static grpc_error* init_window_update_frame_parser(grpc_chttp2_transport* t) {
   grpc_error* err = grpc_chttp2_window_update_parser_begin_frame(
       &t->simple.window_update, t->incoming_frame_size,
       t->incoming_frame_flags);
@@ -678,7 +656,7 @@ static grpc_error* init_window_update_frame_parser(grpc_exec_ctx* exec_ctx,
     grpc_chttp2_stream* s = t->incoming_stream =
         grpc_chttp2_parsing_lookup_stream(t, t->incoming_stream_id);
     if (s == nullptr) {
-      return init_skip_frame_parser(exec_ctx, t, 0);
+      return init_skip_frame_parser(t, 0);
     }
     s->stats.incoming.framing_bytes += 9;
   }
@@ -687,8 +665,7 @@ static grpc_error* init_window_update_frame_parser(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* init_ping_parser(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_transport* t) {
+static grpc_error* init_ping_parser(grpc_chttp2_transport* t) {
   grpc_error* err = grpc_chttp2_ping_parser_begin_frame(
       &t->simple.ping, t->incoming_frame_size, t->incoming_frame_flags);
   if (err != GRPC_ERROR_NONE) return err;
@@ -697,15 +674,14 @@ static grpc_error* init_ping_parser(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* init_rst_stream_parser(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t) {
+static grpc_error* init_rst_stream_parser(grpc_chttp2_transport* t) {
   grpc_error* err = grpc_chttp2_rst_stream_parser_begin_frame(
       &t->simple.rst_stream, t->incoming_frame_size, t->incoming_frame_flags);
   if (err != GRPC_ERROR_NONE) return err;
   grpc_chttp2_stream* s = t->incoming_stream =
       grpc_chttp2_parsing_lookup_stream(t, t->incoming_stream_id);
   if (!t->incoming_stream) {
-    return init_skip_frame_parser(exec_ctx, t, 0);
+    return init_skip_frame_parser(t, 0);
   }
   s->stats.incoming.framing_bytes += 9;
   t->parser = grpc_chttp2_rst_stream_parser_parse;
@@ -713,8 +689,7 @@ static grpc_error* init_rst_stream_parser(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* init_goaway_parser(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_transport* t) {
+static grpc_error* init_goaway_parser(grpc_chttp2_transport* t) {
   grpc_error* err = grpc_chttp2_goaway_parser_begin_frame(
       &t->goaway_parser, t->incoming_frame_size, t->incoming_frame_flags);
   if (err != GRPC_ERROR_NONE) return err;
@@ -723,8 +698,7 @@ static grpc_error* init_goaway_parser(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* init_settings_frame_parser(grpc_exec_ctx* exec_ctx,
-                                              grpc_chttp2_transport* t) {
+static grpc_error* init_settings_frame_parser(grpc_chttp2_transport* t) {
   if (t->incoming_stream_id != 0) {
     return GRPC_ERROR_CREATE_FROM_STATIC_STRING(
         "Settings frame received for grpc_chttp2_stream");
@@ -740,7 +714,7 @@ static grpc_error* init_settings_frame_parser(grpc_exec_ctx* exec_ctx,
     memcpy(t->settings[GRPC_ACKED_SETTINGS], t->settings[GRPC_SENT_SETTINGS],
            GRPC_CHTTP2_NUM_SETTINGS * sizeof(uint32_t));
     grpc_chttp2_hptbl_set_max_bytes(
-        exec_ctx, &t->hpack_parser.table,
+        &t->hpack_parser.table,
         t->settings[GRPC_ACKED_SETTINGS]
                    [GRPC_CHTTP2_SETTINGS_HEADER_TABLE_SIZE]);
     t->sent_local_settings = 0;
@@ -750,11 +724,10 @@ static grpc_error* init_settings_frame_parser(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* parse_frame_slice(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t, grpc_slice slice,
+static grpc_error* parse_frame_slice(grpc_chttp2_transport* t, grpc_slice slice,
                                      int is_last) {
   grpc_chttp2_stream* s = t->incoming_stream;
-  grpc_error* err = t->parser(exec_ctx, t->parser_data, t, s, slice, is_last);
+  grpc_error* err = t->parser(t->parser_data, t, s, slice, is_last);
   if (err == GRPC_ERROR_NONE) {
     return err;
   } else if (grpc_error_get_int(err, GRPC_ERROR_INT_STREAM_ID, nullptr)) {
@@ -762,7 +735,7 @@ static grpc_error* parse_frame_slice(grpc_exec_ctx* exec_ctx,
       const char* msg = grpc_error_string(err);
       gpr_log(GPR_ERROR, "%s", msg);
     }
-    grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
+    grpc_chttp2_parsing_become_skip_parser(t);
     if (s) {
       s->forced_close_error = err;
       grpc_slice_buffer_add(
diff --git a/src/core/ext/transport/chttp2/transport/writing.cc b/src/core/ext/transport/chttp2/transport/writing.cc
index 204b5a7708..043ca9bb83 100644
--- a/src/core/ext/transport/chttp2/transport/writing.cc
+++ b/src/core/ext/transport/chttp2/transport/writing.cc
@@ -33,17 +33,15 @@ static void add_to_write_list(grpc_chttp2_write_cb** list,
   *list = cb;
 }
 
-static void finish_write_cb(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                            grpc_chttp2_stream* s, grpc_chttp2_write_cb* cb,
-                            grpc_error* error) {
-  grpc_chttp2_complete_closure_step(exec_ctx, t, s, &cb->closure, error,
+static void finish_write_cb(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+                            grpc_chttp2_write_cb* cb, grpc_error* error) {
+  grpc_chttp2_complete_closure_step(t, s, &cb->closure, error,
                                     "finish_write_cb");
   cb->next = t->write_cb_pool;
   t->write_cb_pool = cb;
 }
 
-static void maybe_initiate_ping(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_transport* t) {
+static void maybe_initiate_ping(grpc_chttp2_transport* t) {
   grpc_chttp2_ping_queue* pq = &t->ping_queue;
   if (grpc_closure_list_empty(pq->lists[GRPC_CHTTP2_PCL_NEXT])) {
     /* no ping needed: wait */
@@ -68,15 +66,16 @@ static void maybe_initiate_ping(grpc_exec_ctx* exec_ctx,
     }
     return;
   }
-  grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+  grpc_millis now = grpc_core::ExecCtx::Get()->Now();
+
+  grpc_millis next_allowed_ping_interval =
+      (t->keepalive_permit_without_calls == 0 &&
+       grpc_chttp2_stream_map_size(&t->stream_map) == 0)
+          ? 7200 * GPR_MS_PER_SEC
+          : t->ping_policy.min_sent_ping_interval_without_data;
   grpc_millis next_allowed_ping =
-      t->ping_state.last_ping_sent_time +
-      t->ping_policy.min_sent_ping_interval_without_data;
-  if (t->keepalive_permit_without_calls == 0 &&
-      grpc_chttp2_stream_map_size(&t->stream_map) == 0) {
-    next_allowed_ping =
-        t->ping_recv_state.last_ping_recv_time + 7200 * GPR_MS_PER_SEC;
-  }
+      t->ping_state.last_ping_sent_time + next_allowed_ping_interval;
+
   if (next_allowed_ping > now) {
     /* not enough elapsed time between successive pings */
     if (grpc_http_trace.enabled() || grpc_bdp_estimator_trace.enabled()) {
@@ -89,20 +88,20 @@ static void maybe_initiate_ping(grpc_exec_ctx* exec_ctx,
     }
     if (!t->ping_state.is_delayed_ping_timer_set) {
       t->ping_state.is_delayed_ping_timer_set = true;
-      grpc_timer_init(exec_ctx, &t->ping_state.delayed_ping_timer,
-                      next_allowed_ping, &t->retry_initiate_ping_locked);
+      grpc_timer_init(&t->ping_state.delayed_ping_timer, next_allowed_ping,
+                      &t->retry_initiate_ping_locked);
     }
     return;
   }
 
   pq->inflight_id = t->ping_ctr;
   t->ping_ctr++;
-  GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pq->lists[GRPC_CHTTP2_PCL_INITIATE]);
+  GRPC_CLOSURE_LIST_SCHED(&pq->lists[GRPC_CHTTP2_PCL_INITIATE]);
   grpc_closure_list_move(&pq->lists[GRPC_CHTTP2_PCL_NEXT],
                          &pq->lists[GRPC_CHTTP2_PCL_INFLIGHT]);
   grpc_slice_buffer_add(&t->outbuf,
                         grpc_chttp2_ping_create(false, pq->inflight_id));
-  GRPC_STATS_INC_HTTP2_PINGS_SENT(exec_ctx);
+  GRPC_STATS_INC_HTTP2_PINGS_SENT();
   t->ping_state.last_ping_sent_time = now;
   if (grpc_http_trace.enabled() || grpc_bdp_estimator_trace.enabled()) {
     gpr_log(GPR_DEBUG, "%s: Ping sent [%p]: %d/%d",
@@ -114,10 +113,9 @@ static void maybe_initiate_ping(grpc_exec_ctx* exec_ctx,
       (t->ping_state.pings_before_data_required != 0);
 }
 
-static bool update_list(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                        grpc_chttp2_stream* s, int64_t send_bytes,
-                        grpc_chttp2_write_cb** list, int64_t* ctr,
-                        grpc_error* error) {
+static bool update_list(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+                        int64_t send_bytes, grpc_chttp2_write_cb** list,
+                        int64_t* ctr, grpc_error* error) {
   bool sched_any = false;
   grpc_chttp2_write_cb* cb = *list;
   *list = nullptr;
@@ -126,7 +124,7 @@ static bool update_list(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
     grpc_chttp2_write_cb* next = cb->next;
     if (cb->call_at_byte <= *ctr) {
       sched_any = true;
-      finish_write_cb(exec_ctx, t, s, cb, GRPC_ERROR_REF(error));
+      finish_write_cb(t, s, cb, GRPC_ERROR_REF(error));
     } else {
       add_to_write_list(list, cb);
     }
@@ -179,22 +177,22 @@ class StreamWriteContext;
 
 class WriteContext {
  public:
-  WriteContext(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t) : t_(t) {
-    GRPC_STATS_INC_HTTP2_WRITES_BEGUN(exec_ctx);
+  WriteContext(grpc_chttp2_transport* t) : t_(t) {
+    GRPC_STATS_INC_HTTP2_WRITES_BEGUN();
     GPR_TIMER_BEGIN("grpc_chttp2_begin_write", 0);
   }
 
   // TODO(ctiller): make this the destructor
-  void FlushStats(grpc_exec_ctx* exec_ctx) {
+  void FlushStats() {
     GRPC_STATS_INC_HTTP2_SEND_INITIAL_METADATA_PER_WRITE(
-        exec_ctx, initial_metadata_writes_);
-    GRPC_STATS_INC_HTTP2_SEND_MESSAGE_PER_WRITE(exec_ctx, message_writes_);
+        initial_metadata_writes_);
+    GRPC_STATS_INC_HTTP2_SEND_MESSAGE_PER_WRITE(message_writes_);
     GRPC_STATS_INC_HTTP2_SEND_TRAILING_METADATA_PER_WRITE(
-        exec_ctx, trailing_metadata_writes_);
-    GRPC_STATS_INC_HTTP2_SEND_FLOWCTL_PER_WRITE(exec_ctx, flow_control_writes_);
+        trailing_metadata_writes_);
+    GRPC_STATS_INC_HTTP2_SEND_FLOWCTL_PER_WRITE(flow_control_writes_);
   }
 
-  void FlushSettings(grpc_exec_ctx* exec_ctx) {
+  void FlushSettings() {
     if (t_->dirtied_local_settings && !t_->sent_local_settings) {
       grpc_slice_buffer_add(
           &t_->outbuf, grpc_chttp2_settings_create(
@@ -204,17 +202,17 @@ class WriteContext {
       t_->force_send_settings = false;
       t_->dirtied_local_settings = false;
       t_->sent_local_settings = true;
-      GRPC_STATS_INC_HTTP2_SETTINGS_WRITES(exec_ctx);
+      GRPC_STATS_INC_HTTP2_SETTINGS_WRITES();
     }
   }
 
-  void FlushQueuedBuffers(grpc_exec_ctx* exec_ctx) {
+  void FlushQueuedBuffers() {
     /* simple writes are queued to qbuf, and flushed here */
     grpc_slice_buffer_move_into(&t_->qbuf, &t_->outbuf);
     GPR_ASSERT(t_->qbuf.count == 0);
   }
 
-  void FlushWindowUpdates(grpc_exec_ctx* exec_ctx) {
+  void FlushWindowUpdates() {
     uint32_t transport_announce =
         t_->flow_control->MaybeSendUpdate(t_->outbuf.count > 0);
     if (transport_announce) {
@@ -234,7 +232,7 @@ class WriteContext {
     t_->ping_ack_count = 0;
   }
 
-  void EnactHpackSettings(grpc_exec_ctx* exec_ctx) {
+  void EnactHpackSettings() {
     grpc_chttp2_hpack_compressor_set_max_table_size(
         &t_->hpack_compressor,
         t_->settings[GRPC_PEER_SETTINGS]
@@ -374,8 +372,8 @@ class DataSendContext {
 
   bool is_last_frame() const { return is_last_frame_; }
 
-  void CallCallbacks(grpc_exec_ctx* exec_ctx) {
-    if (update_list(exec_ctx, t_, s_,
+  void CallCallbacks() {
+    if (update_list(t_, s_,
                     (int64_t)(s_->sending_bytes - sending_bytes_before_),
                     &s_->on_flow_controlled_cbs,
                     &s_->flow_controlled_bytes_flowed, GRPC_ERROR_NONE)) {
@@ -403,7 +401,7 @@ class StreamWriteContext {
                       s->flow_control->announced_window_delta())));
   }
 
-  void FlushInitialMetadata(grpc_exec_ctx* exec_ctx) {
+  void FlushInitialMetadata() {
     /* send initial metadata if it's available */
     if (s_->sent_initial_metadata) return;
     if (s_->send_initial_metadata == nullptr) return;
@@ -430,7 +428,7 @@ class StreamWriteContext {
                       [GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE],  // max_frame_size
           &s_->stats.outgoing                                 // stats
       };
-      grpc_chttp2_encode_header(exec_ctx, &t_->hpack_compressor, nullptr, 0,
+      grpc_chttp2_encode_header(&t_->hpack_compressor, nullptr, 0,
                                 s_->send_initial_metadata, &hopt, &t_->outbuf);
       write_context_->ResetPingRecvClock();
       write_context_->IncInitialMetadataWrites();
@@ -440,11 +438,11 @@ class StreamWriteContext {
     s_->sent_initial_metadata = true;
     write_context_->NoteScheduledResults();
     grpc_chttp2_complete_closure_step(
-        exec_ctx, t_, s_, &s_->send_initial_metadata_finished, GRPC_ERROR_NONE,
+        t_, s_, &s_->send_initial_metadata_finished, GRPC_ERROR_NONE,
         "send_initial_metadata_finished");
   }
 
-  void FlushWindowUpdates(grpc_exec_ctx* exec_ctx) {
+  void FlushWindowUpdates() {
     /* send any window updates */
     const uint32_t stream_announce = s_->flow_control->MaybeSendUpdate();
     if (stream_announce == 0) return;
@@ -456,7 +454,7 @@ class StreamWriteContext {
     write_context_->IncWindowUpdateWrites();
   }
 
-  void FlushData(grpc_exec_ctx* exec_ctx) {
+  void FlushData() {
     if (!s_->sent_initial_metadata) return;
 
     if (s_->flow_controlled_buffer.length == 0 &&
@@ -488,9 +486,9 @@ class StreamWriteContext {
     }
     write_context_->ResetPingRecvClock();
     if (data_send_context.is_last_frame()) {
-      SentLastFrame(exec_ctx);
+      SentLastFrame();
     }
-    data_send_context.CallCallbacks(exec_ctx);
+    data_send_context.CallCallbacks();
     stream_became_writable_ = true;
     if (s_->flow_controlled_buffer.length > 0 ||
         s_->compressed_data_buffer.length > 0) {
@@ -500,7 +498,7 @@ class StreamWriteContext {
     write_context_->IncMessageWrites();
   }
 
-  void FlushTrailingMetadata(grpc_exec_ctx* exec_ctx) {
+  void FlushTrailingMetadata() {
     if (!s_->sent_initial_metadata) return;
 
     if (s_->send_trailing_metadata == nullptr) return;
@@ -521,18 +519,18 @@ class StreamWriteContext {
 
           t_->settings[GRPC_PEER_SETTINGS][GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE],
           &s_->stats.outgoing};
-      grpc_chttp2_encode_header(exec_ctx, &t_->hpack_compressor,
+      grpc_chttp2_encode_header(&t_->hpack_compressor,
                                 extra_headers_for_trailing_metadata_,
                                 num_extra_headers_for_trailing_metadata_,
                                 s_->send_trailing_metadata, &hopt, &t_->outbuf);
     }
     write_context_->IncTrailingMetadataWrites();
     write_context_->ResetPingRecvClock();
-    SentLastFrame(exec_ctx);
+    SentLastFrame();
 
     write_context_->NoteScheduledResults();
     grpc_chttp2_complete_closure_step(
-        exec_ctx, t_, s_, &s_->send_trailing_metadata_finished, GRPC_ERROR_NONE,
+        t_, s_, &s_->send_trailing_metadata_finished, GRPC_ERROR_NONE,
         "send_trailing_metadata_finished");
   }
 
@@ -556,7 +554,7 @@ class StreamWriteContext {
     }
   }
 
-  void SentLastFrame(grpc_exec_ctx* exec_ctx) {
+  void SentLastFrame() {
     s_->send_trailing_metadata = nullptr;
     s_->sent_trailing_metadata = true;
 
@@ -565,7 +563,7 @@ class StreamWriteContext {
           &t_->outbuf, grpc_chttp2_rst_stream_create(
                            s_->id, GRPC_HTTP2_NO_ERROR, &s_->stats.outgoing));
     }
-    grpc_chttp2_mark_stream_closed(exec_ctx, t_, s_, !t_->is_client, true,
+    grpc_chttp2_mark_stream_closed(t_, s_, !t_->is_client, true,
                                    GRPC_ERROR_NONE);
   }
 
@@ -579,12 +577,12 @@ class StreamWriteContext {
 }  // namespace
 
 grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t) {
-  WriteContext ctx(exec_ctx, t);
-  ctx.FlushSettings(exec_ctx);
+    grpc_chttp2_transport* t) {
+  WriteContext ctx(t);
+  ctx.FlushSettings();
   ctx.FlushPingAcks();
-  ctx.FlushQueuedBuffers(exec_ctx);
-  ctx.EnactHpackSettings(exec_ctx);
+  ctx.FlushQueuedBuffers();
+  ctx.EnactHpackSettings();
 
   if (t->flow_control->remote_window() > 0) {
     ctx.UpdateStreamsNoLongerStalled();
@@ -594,47 +592,45 @@ grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
      (according to available window sizes) and add to the output buffer */
   while (grpc_chttp2_stream* s = ctx.NextStream()) {
     StreamWriteContext stream_ctx(&ctx, s);
-    stream_ctx.FlushInitialMetadata(exec_ctx);
-    stream_ctx.FlushWindowUpdates(exec_ctx);
-    stream_ctx.FlushData(exec_ctx);
-    stream_ctx.FlushTrailingMetadata(exec_ctx);
+    stream_ctx.FlushInitialMetadata();
+    stream_ctx.FlushWindowUpdates();
+    stream_ctx.FlushData();
+    stream_ctx.FlushTrailingMetadata();
 
     if (stream_ctx.stream_became_writable()) {
       if (!grpc_chttp2_list_add_writing_stream(t, s)) {
         /* already in writing list: drop ref */
-        GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2_writing:already_writing");
+        GRPC_CHTTP2_STREAM_UNREF(s, "chttp2_writing:already_writing");
       } else {
         /* ref will be dropped at end of write */
       }
     } else {
-      GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2_writing:no_write");
+      GRPC_CHTTP2_STREAM_UNREF(s, "chttp2_writing:no_write");
     }
   }
 
-  ctx.FlushWindowUpdates(exec_ctx);
+  ctx.FlushWindowUpdates();
 
-  maybe_initiate_ping(exec_ctx, t);
+  maybe_initiate_ping(t);
 
   GPR_TIMER_END("grpc_chttp2_begin_write", 0);
 
   return ctx.Result();
 }
 
-void grpc_chttp2_end_write(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                           grpc_error* error) {
+void grpc_chttp2_end_write(grpc_chttp2_transport* t, grpc_error* error) {
   GPR_TIMER_BEGIN("grpc_chttp2_end_write", 0);
   grpc_chttp2_stream* s;
 
   while (grpc_chttp2_list_pop_writing_stream(t, &s)) {
     if (s->sending_bytes != 0) {
-      update_list(exec_ctx, t, s, (int64_t)s->sending_bytes,
-                  &s->on_write_finished_cbs, &s->flow_controlled_bytes_written,
-                  GRPC_ERROR_REF(error));
+      update_list(t, s, (int64_t)s->sending_bytes, &s->on_write_finished_cbs,
+                  &s->flow_controlled_bytes_written, GRPC_ERROR_REF(error));
       s->sending_bytes = 0;
     }
-    GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2_writing:end");
+    GRPC_CHTTP2_STREAM_UNREF(s, "chttp2_writing:end");
   }
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &t->outbuf);
+  grpc_slice_buffer_reset_and_unref_internal(&t->outbuf);
   GRPC_ERROR_UNREF(error);
   GPR_TIMER_END("grpc_chttp2_end_write", 0);
 }
diff --git a/src/core/ext/transport/cronet/client/secure/cronet_channel_create.cc b/src/core/ext/transport/cronet/client/secure/cronet_channel_create.cc
index d590ba0371..40a30e4a31 100644
--- a/src/core/ext/transport/cronet/client/secure/cronet_channel_create.cc
+++ b/src/core/ext/transport/cronet/client/secure/cronet_channel_create.cc
@@ -49,7 +49,6 @@ GRPCAPI grpc_channel* grpc_cronet_secure_channel_create(
   grpc_transport* ct =
       grpc_create_cronet_transport(engine, target, args, reserved);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  return grpc_channel_create(&exec_ctx, target, args,
-                             GRPC_CLIENT_DIRECT_CHANNEL, ct);
+  grpc_core::ExecCtx exec_ctx;
+  return grpc_channel_create(target, args, GRPC_CLIENT_DIRECT_CHANNEL, ct);
 }
diff --git a/src/core/ext/transport/cronet/transport/cronet_transport.cc b/src/core/ext/transport/cronet/transport/cronet_transport.cc
index 4d24efe47b..5723da5f9d 100644
--- a/src/core/ext/transport/cronet/transport/cronet_transport.cc
+++ b/src/core/ext/transport/cronet/transport/cronet_transport.cc
@@ -197,27 +197,23 @@ typedef struct stream_obj stream_obj;
 #ifndef NDEBUG
 #define GRPC_CRONET_STREAM_REF(stream, reason) \
   grpc_cronet_stream_ref((stream), (reason))
-#define GRPC_CRONET_STREAM_UNREF(exec_ctx, stream, reason) \
-  grpc_cronet_stream_unref((exec_ctx), (stream), (reason))
+#define GRPC_CRONET_STREAM_UNREF(stream, reason) \
+  grpc_cronet_stream_unref((stream), (reason))
 void grpc_cronet_stream_ref(stream_obj* s, const char* reason) {
   grpc_stream_ref(s->refcount, reason);
 }
-void grpc_cronet_stream_unref(grpc_exec_ctx* exec_ctx, stream_obj* s,
-                              const char* reason) {
-  grpc_stream_unref(exec_ctx, s->refcount, reason);
+void grpc_cronet_stream_unref(stream_obj* s, const char* reason) {
+  grpc_stream_unref(s->refcount, reason);
 }
 #else
 #define GRPC_CRONET_STREAM_REF(stream, reason) grpc_cronet_stream_ref((stream))
-#define GRPC_CRONET_STREAM_UNREF(exec_ctx, stream, reason) \
-  grpc_cronet_stream_unref((exec_ctx), (stream))
+#define GRPC_CRONET_STREAM_UNREF(stream, reason) \
+  grpc_cronet_stream_unref((stream))
 void grpc_cronet_stream_ref(stream_obj* s) { grpc_stream_ref(s->refcount); }
-void grpc_cronet_stream_unref(grpc_exec_ctx* exec_ctx, stream_obj* s) {
-  grpc_stream_unref(exec_ctx, s->refcount);
-}
+void grpc_cronet_stream_unref(stream_obj* s) { grpc_stream_unref(s->refcount); }
 #endif
 
-static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
-                                          struct op_and_state* oas);
+static enum e_op_result execute_stream_op(struct op_and_state* oas);
 
 /*
   Utility function to translate enum into string for printing
@@ -373,12 +369,12 @@ static void remove_from_storage(struct stream_obj* s,
   This can get executed from the Cronet network thread via cronet callback
   or on the application supplied thread via the perform_stream_op function.
 */
-static void execute_from_storage(grpc_exec_ctx* exec_ctx, stream_obj* s) {
+static void execute_from_storage(stream_obj* s) {
   gpr_mu_lock(&s->mu);
   for (struct op_and_state* curr = s->storage.head; curr != nullptr;) {
     CRONET_LOG(GPR_DEBUG, "calling op at %p. done = %d", curr, curr->done);
     GPR_ASSERT(curr->done == 0);
-    enum e_op_result result = execute_stream_op(exec_ctx, curr);
+    enum e_op_result result = execute_stream_op(curr);
     CRONET_LOG(GPR_DEBUG, "execute_stream_op[%p] returns %s", curr,
                op_result_string(result));
     /* if this op is done, then remove it and free memory */
@@ -401,8 +397,8 @@ static void execute_from_storage(grpc_exec_ctx* exec_ctx, stream_obj* s) {
   Cronet callback
 */
 static void on_failed(bidirectional_stream* stream, int net_error) {
-  CRONET_LOG(GPR_DEBUG, "on_failed(%p, %d)", stream, net_error);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  gpr_log(GPR_ERROR, "on_failed(%p, %d)", stream, net_error);
+  grpc_core::ExecCtx exec_ctx;
 
   stream_obj* s = (stream_obj*)stream->annotation;
   gpr_mu_lock(&s->mu);
@@ -419,9 +415,8 @@ static void on_failed(bidirectional_stream* stream, int net_error) {
   }
   null_and_maybe_free_read_buffer(s);
   gpr_mu_unlock(&s->mu);
-  execute_from_storage(&exec_ctx, s);
-  GRPC_CRONET_STREAM_UNREF(&exec_ctx, s, "cronet transport");
-  grpc_exec_ctx_finish(&exec_ctx);
+  execute_from_storage(s);
+  GRPC_CRONET_STREAM_UNREF(s, "cronet transport");
 }
 
 /*
@@ -429,7 +424,7 @@ static void on_failed(bidirectional_stream* stream, int net_error) {
 */
 static void on_canceled(bidirectional_stream* stream) {
   CRONET_LOG(GPR_DEBUG, "on_canceled(%p)", stream);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   stream_obj* s = (stream_obj*)stream->annotation;
   gpr_mu_lock(&s->mu);
@@ -446,9 +441,8 @@ static void on_canceled(bidirectional_stream* stream) {
   }
   null_and_maybe_free_read_buffer(s);
   gpr_mu_unlock(&s->mu);
-  execute_from_storage(&exec_ctx, s);
-  GRPC_CRONET_STREAM_UNREF(&exec_ctx, s, "cronet transport");
-  grpc_exec_ctx_finish(&exec_ctx);
+  execute_from_storage(s);
+  GRPC_CRONET_STREAM_UNREF(s, "cronet transport");
 }
 
 /*
@@ -456,7 +450,7 @@ static void on_canceled(bidirectional_stream* stream) {
 */
 static void on_succeeded(bidirectional_stream* stream) {
   CRONET_LOG(GPR_DEBUG, "on_succeeded(%p)", stream);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   stream_obj* s = (stream_obj*)stream->annotation;
   gpr_mu_lock(&s->mu);
@@ -465,9 +459,8 @@ static void on_succeeded(bidirectional_stream* stream) {
   s->cbs = nullptr;
   null_and_maybe_free_read_buffer(s);
   gpr_mu_unlock(&s->mu);
-  execute_from_storage(&exec_ctx, s);
-  GRPC_CRONET_STREAM_UNREF(&exec_ctx, s, "cronet transport");
-  grpc_exec_ctx_finish(&exec_ctx);
+  execute_from_storage(s);
+  GRPC_CRONET_STREAM_UNREF(s, "cronet transport");
 }
 
 /*
@@ -475,7 +468,7 @@ static void on_succeeded(bidirectional_stream* stream) {
 */
 static void on_stream_ready(bidirectional_stream* stream) {
   CRONET_LOG(GPR_DEBUG, "W: on_stream_ready(%p)", stream);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   stream_obj* s = (stream_obj*)stream->annotation;
   grpc_cronet_transport* t = (grpc_cronet_transport*)s->curr_ct;
   gpr_mu_lock(&s->mu);
@@ -495,8 +488,7 @@ static void on_stream_ready(bidirectional_stream* stream) {
     }
   }
   gpr_mu_unlock(&s->mu);
-  execute_from_storage(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  execute_from_storage(s);
 }
 
 /*
@@ -506,7 +498,7 @@ static void on_response_headers_received(
     bidirectional_stream* stream,
     const bidirectional_stream_header_array* headers,
     const char* negotiated_protocol) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   CRONET_LOG(GPR_DEBUG, "R: on_response_headers_received(%p, %p, %s)", stream,
              headers, negotiated_protocol);
   stream_obj* s = (stream_obj*)stream->annotation;
@@ -528,9 +520,8 @@ static void on_response_headers_received(
   for (size_t i = 0; i < headers->count; i++) {
     GRPC_LOG_IF_ERROR("on_response_headers_received",
                       grpc_chttp2_incoming_metadata_buffer_add(
-                          &exec_ctx, &s->state.rs.initial_metadata,
+                          &s->state.rs.initial_metadata,
                           grpc_mdelem_from_slices(
-                              &exec_ctx,
                               grpc_slice_intern(grpc_slice_from_static_string(
                                   headers->headers[i].key)),
                               grpc_slice_intern(grpc_slice_from_static_string(
@@ -552,15 +543,14 @@ static void on_response_headers_received(
     s->state.pending_read_from_cronet = true;
   }
   gpr_mu_unlock(&s->mu);
-  execute_from_storage(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  execute_from_storage(s);
 }
 
 /*
   Cronet callback
 */
 static void on_write_completed(bidirectional_stream* stream, const char* data) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   stream_obj* s = (stream_obj*)stream->annotation;
   CRONET_LOG(GPR_DEBUG, "W: on_write_completed(%p, %s)", stream, data);
   gpr_mu_lock(&s->mu);
@@ -570,8 +560,7 @@ static void on_write_completed(bidirectional_stream* stream, const char* data) {
   }
   s->state.state_callback_received[OP_SEND_MESSAGE] = true;
   gpr_mu_unlock(&s->mu);
-  execute_from_storage(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  execute_from_storage(s);
 }
 
 /*
@@ -579,7 +568,7 @@ static void on_write_completed(bidirectional_stream* stream, const char* data) {
 */
 static void on_read_completed(bidirectional_stream* stream, char* data,
                               int count) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   stream_obj* s = (stream_obj*)stream->annotation;
   CRONET_LOG(GPR_DEBUG, "R: on_read_completed(%p, %p, %d)", stream, data,
              count);
@@ -605,15 +594,14 @@ static void on_read_completed(bidirectional_stream* stream, char* data,
       gpr_mu_unlock(&s->mu);
     } else {
       gpr_mu_unlock(&s->mu);
-      execute_from_storage(&exec_ctx, s);
+      execute_from_storage(s);
     }
   } else {
     null_and_maybe_free_read_buffer(s);
     s->state.rs.read_stream_closed = true;
     gpr_mu_unlock(&s->mu);
-    execute_from_storage(&exec_ctx, s);
+    execute_from_storage(s);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 /*
@@ -622,7 +610,7 @@ static void on_read_completed(bidirectional_stream* stream, char* data,
 static void on_response_trailers_received(
     bidirectional_stream* stream,
     const bidirectional_stream_header_array* trailers) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   CRONET_LOG(GPR_DEBUG, "R: on_response_trailers_received(%p,%p)", stream,
              trailers);
   stream_obj* s = (stream_obj*)stream->annotation;
@@ -638,9 +626,8 @@ static void on_response_trailers_received(
                trailers->headers[i].value);
     GRPC_LOG_IF_ERROR("on_response_trailers_received",
                       grpc_chttp2_incoming_metadata_buffer_add(
-                          &exec_ctx, &s->state.rs.trailing_metadata,
+                          &s->state.rs.trailing_metadata,
                           grpc_mdelem_from_slices(
-                              &exec_ctx,
                               grpc_slice_intern(grpc_slice_from_static_string(
                                   trailers->headers[i].key)),
                               grpc_slice_intern(grpc_slice_from_static_string(
@@ -670,17 +657,15 @@ static void on_response_trailers_received(
     gpr_mu_unlock(&s->mu);
   } else {
     gpr_mu_unlock(&s->mu);
-    execute_from_storage(&exec_ctx, s);
+    execute_from_storage(s);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 /*
  Utility function that takes the data from s->write_slice_buffer and assembles
  into a contiguous byte stream with 5 byte gRPC header prepended.
 */
-static void create_grpc_frame(grpc_exec_ctx* exec_ctx,
-                              grpc_slice_buffer* write_slice_buffer,
+static void create_grpc_frame(grpc_slice_buffer* write_slice_buffer,
                               char** pp_write_buffer,
                               size_t* p_write_buffer_size, uint32_t flags) {
   grpc_slice slice = grpc_slice_buffer_take_first(write_slice_buffer);
@@ -700,7 +685,7 @@ static void create_grpc_frame(grpc_exec_ctx* exec_ctx,
   *p++ = (uint8_t)(length);
   /* append actual data */
   memcpy(p, GRPC_SLICE_START_PTR(slice), length);
-  grpc_slice_unref_internal(exec_ctx, slice);
+  grpc_slice_unref_internal(slice);
 }
 
 /*
@@ -981,8 +966,7 @@ static bool op_can_be_run(grpc_transport_stream_op_batch* curr_op,
 /*
   TODO (makdharma): Break down this function in smaller chunks for readability.
 */
-static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
-                                          struct op_and_state* oas) {
+static enum e_op_result execute_stream_op(struct op_and_state* oas) {
   grpc_transport_stream_op_batch* stream_op = &oas->op;
   struct stream_obj* s = oas->s;
   grpc_cronet_transport* t = (grpc_cronet_transport*)s->curr_ct;
@@ -1040,15 +1024,14 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
       grpc_slice slice;
       grpc_slice_buffer_init(&write_slice_buffer);
       if (1 != grpc_byte_stream_next(
-                   exec_ctx, stream_op->payload->send_message.send_message,
+                   stream_op->payload->send_message.send_message,
                    stream_op->payload->send_message.send_message->length,
                    nullptr)) {
         /* Should never reach here */
         GPR_ASSERT(false);
       }
       if (GRPC_ERROR_NONE !=
-          grpc_byte_stream_pull(exec_ctx,
-                                stream_op->payload->send_message.send_message,
+          grpc_byte_stream_pull(stream_op->payload->send_message.send_message,
                                 &slice)) {
         /* Should never reach here */
         GPR_ASSERT(false);
@@ -1061,15 +1044,15 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
       }
       if (write_slice_buffer.count > 0) {
         size_t write_buffer_size;
-        create_grpc_frame(exec_ctx, &write_slice_buffer,
-                          &stream_state->ws.write_buffer, &write_buffer_size,
+        create_grpc_frame(&write_slice_buffer, &stream_state->ws.write_buffer,
+                          &write_buffer_size,
                           stream_op->payload->send_message.send_message->flags);
         CRONET_LOG(GPR_DEBUG, "bidirectional_stream_write (%p, %p)", s->cbs,
                    stream_state->ws.write_buffer);
         stream_state->state_callback_received[OP_SEND_MESSAGE] = false;
         bidirectional_stream_write(s->cbs, stream_state->ws.write_buffer,
                                    (int)write_buffer_size, false);
-        grpc_slice_buffer_destroy_internal(exec_ctx, &write_slice_buffer);
+        grpc_slice_buffer_destroy_internal(&write_slice_buffer);
         if (t->use_packet_coalescing) {
           if (!stream_op->send_trailing_metadata) {
             CRONET_LOG(GPR_DEBUG, "bidirectional_stream_flush (%p)", s->cbs);
@@ -1112,25 +1095,21 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_RECV_INITIAL_METADATA", oas);
     if (stream_state->state_op_done[OP_CANCEL_ERROR]) {
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           stream_op->payload->recv_initial_metadata.recv_initial_metadata_ready,
           GRPC_ERROR_NONE);
     } else if (stream_state->state_callback_received[OP_FAILED]) {
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           stream_op->payload->recv_initial_metadata.recv_initial_metadata_ready,
           GRPC_ERROR_NONE);
     } else if (stream_state->state_op_done[OP_RECV_TRAILING_METADATA]) {
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           stream_op->payload->recv_initial_metadata.recv_initial_metadata_ready,
           GRPC_ERROR_NONE);
     } else {
       grpc_chttp2_incoming_metadata_buffer_publish(
-          exec_ctx, &oas->s->state.rs.initial_metadata,
+          &oas->s->state.rs.initial_metadata,
           stream_op->payload->recv_initial_metadata.recv_initial_metadata);
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           stream_op->payload->recv_initial_metadata.recv_initial_metadata_ready,
           GRPC_ERROR_NONE);
     }
@@ -1141,16 +1120,14 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_RECV_MESSAGE", oas);
     if (stream_state->state_op_done[OP_CANCEL_ERROR]) {
       CRONET_LOG(GPR_DEBUG, "Stream is cancelled.");
-      GRPC_CLOSURE_SCHED(exec_ctx,
-                         stream_op->payload->recv_message.recv_message_ready,
+      GRPC_CLOSURE_SCHED(stream_op->payload->recv_message.recv_message_ready,
                          GRPC_ERROR_NONE);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
       oas->state.state_op_done[OP_RECV_MESSAGE] = true;
       result = ACTION_TAKEN_NO_CALLBACK;
     } else if (stream_state->state_callback_received[OP_FAILED]) {
       CRONET_LOG(GPR_DEBUG, "Stream failed.");
-      GRPC_CLOSURE_SCHED(exec_ctx,
-                         stream_op->payload->recv_message.recv_message_ready,
+      GRPC_CLOSURE_SCHED(stream_op->payload->recv_message.recv_message_ready,
                          GRPC_ERROR_NONE);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
       oas->state.state_op_done[OP_RECV_MESSAGE] = true;
@@ -1158,16 +1135,14 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
     } else if (stream_state->rs.read_stream_closed == true) {
       /* No more data will be received */
       CRONET_LOG(GPR_DEBUG, "read stream closed");
-      GRPC_CLOSURE_SCHED(exec_ctx,
-                         stream_op->payload->recv_message.recv_message_ready,
+      GRPC_CLOSURE_SCHED(stream_op->payload->recv_message.recv_message_ready,
                          GRPC_ERROR_NONE);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
       oas->state.state_op_done[OP_RECV_MESSAGE] = true;
       result = ACTION_TAKEN_NO_CALLBACK;
     } else if (stream_state->flush_read) {
       CRONET_LOG(GPR_DEBUG, "flush read");
-      GRPC_CLOSURE_SCHED(exec_ctx,
-                         stream_op->payload->recv_message.recv_message_ready,
+      GRPC_CLOSURE_SCHED(stream_op->payload->recv_message.recv_message_ready,
                          GRPC_ERROR_NONE);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
       oas->state.state_op_done[OP_RECV_MESSAGE] = true;
@@ -1200,7 +1175,7 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
           CRONET_LOG(GPR_DEBUG, "read operation complete. Empty response.");
           /* Clean up read_slice_buffer in case there is unread data. */
           grpc_slice_buffer_destroy_internal(
-              exec_ctx, &stream_state->rs.read_slice_buffer);
+              &stream_state->rs.read_slice_buffer);
           grpc_slice_buffer_init(&stream_state->rs.read_slice_buffer);
           grpc_slice_buffer_stream_init(&stream_state->rs.sbs,
                                         &stream_state->rs.read_slice_buffer, 0);
@@ -1210,7 +1185,7 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
           *((grpc_byte_buffer**)stream_op->payload->recv_message.recv_message) =
               (grpc_byte_buffer*)&stream_state->rs.sbs;
           GRPC_CLOSURE_SCHED(
-              exec_ctx, stream_op->payload->recv_message.recv_message_ready,
+              stream_op->payload->recv_message.recv_message_ready,
               GRPC_ERROR_NONE);
           stream_state->state_op_done[OP_RECV_MESSAGE] = true;
           oas->state.state_op_done[OP_RECV_MESSAGE] = true;
@@ -1254,8 +1229,7 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
              (size_t)stream_state->rs.length_field);
       null_and_maybe_free_read_buffer(s);
       /* Clean up read_slice_buffer in case there is unread data. */
-      grpc_slice_buffer_destroy_internal(exec_ctx,
-                                         &stream_state->rs.read_slice_buffer);
+      grpc_slice_buffer_destroy_internal(&stream_state->rs.read_slice_buffer);
       grpc_slice_buffer_init(&stream_state->rs.read_slice_buffer);
       grpc_slice_buffer_add(&stream_state->rs.read_slice_buffer,
                             read_data_slice);
@@ -1266,8 +1240,7 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
       }
       *((grpc_byte_buffer**)stream_op->payload->recv_message.recv_message) =
           (grpc_byte_buffer*)&stream_state->rs.sbs;
-      GRPC_CLOSURE_SCHED(exec_ctx,
-                         stream_op->payload->recv_message.recv_message_ready,
+      GRPC_CLOSURE_SCHED(stream_op->payload->recv_message.recv_message_ready,
                          GRPC_ERROR_NONE);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
       oas->state.state_op_done[OP_RECV_MESSAGE] = true;
@@ -1290,7 +1263,7 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_RECV_TRAILING_METADATA", oas);
     if (oas->s->state.rs.trailing_metadata_valid) {
       grpc_chttp2_incoming_metadata_buffer_publish(
-          exec_ctx, &oas->s->state.rs.trailing_metadata,
+          &oas->s->state.rs.trailing_metadata,
           stream_op->payload->recv_trailing_metadata.recv_trailing_metadata);
       stream_state->rs.trailing_metadata_valid = false;
     }
@@ -1315,17 +1288,17 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
              op_can_be_run(stream_op, s, &oas->state, OP_ON_COMPLETE)) {
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_ON_COMPLETE", oas);
     if (stream_state->state_op_done[OP_CANCEL_ERROR]) {
-      GRPC_CLOSURE_SCHED(exec_ctx, stream_op->on_complete,
+      GRPC_CLOSURE_SCHED(stream_op->on_complete,
                          GRPC_ERROR_REF(stream_state->cancel_error));
     } else if (stream_state->state_callback_received[OP_FAILED]) {
       GRPC_CLOSURE_SCHED(
-          exec_ctx, stream_op->on_complete,
+          stream_op->on_complete,
           make_error_with_desc(GRPC_STATUS_UNAVAILABLE, "Unavailable."));
     } else {
       /* All actions in this stream_op are complete. Call the on_complete
        * callback
        */
-      GRPC_CLOSURE_SCHED(exec_ctx, stream_op->on_complete, GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(stream_op->on_complete, GRPC_ERROR_NONE);
     }
     oas->state.state_op_done[OP_ON_COMPLETE] = true;
     oas->done = true;
@@ -1350,9 +1323,9 @@ static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
   Functions used by upper layers to access transport functionality.
 */
 
-static int init_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                       grpc_stream* gs, grpc_stream_refcount* refcount,
-                       const void* server_data, gpr_arena* arena) {
+static int init_stream(grpc_transport* gt, grpc_stream* gs,
+                       grpc_stream_refcount* refcount, const void* server_data,
+                       gpr_arena* arena) {
   stream_obj* s = (stream_obj*)gs;
 
   s->refcount = refcount;
@@ -1383,15 +1356,13 @@ static int init_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
   return 0;
 }
 
-static void set_pollset_do_nothing(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                                   grpc_stream* gs, grpc_pollset* pollset) {}
+static void set_pollset_do_nothing(grpc_transport* gt, grpc_stream* gs,
+                                   grpc_pollset* pollset) {}
 
-static void set_pollset_set_do_nothing(grpc_exec_ctx* exec_ctx,
-                                       grpc_transport* gt, grpc_stream* gs,
+static void set_pollset_set_do_nothing(grpc_transport* gt, grpc_stream* gs,
                                        grpc_pollset_set* pollset_set) {}
 
-static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                              grpc_stream* gs,
+static void perform_stream_op(grpc_transport* gt, grpc_stream* gs,
                               grpc_transport_stream_op_batch* op) {
   CRONET_LOG(GPR_DEBUG, "perform_stream_op");
   if (op->send_initial_metadata &&
@@ -1401,42 +1372,36 @@ static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
      this field is present in metadata */
     if (op->recv_initial_metadata) {
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           op->payload->recv_initial_metadata.recv_initial_metadata_ready,
           GRPC_ERROR_CANCELLED);
     }
     if (op->recv_message) {
-      GRPC_CLOSURE_SCHED(exec_ctx, op->payload->recv_message.recv_message_ready,
+      GRPC_CLOSURE_SCHED(op->payload->recv_message.recv_message_ready,
                          GRPC_ERROR_CANCELLED);
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, op->on_complete, GRPC_ERROR_CANCELLED);
+    GRPC_CLOSURE_SCHED(op->on_complete, GRPC_ERROR_CANCELLED);
     return;
   }
   stream_obj* s = (stream_obj*)gs;
   add_to_storage(s, op);
-  execute_from_storage(exec_ctx, s);
+  execute_from_storage(s);
 }
 
-static void destroy_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                           grpc_stream* gs,
+static void destroy_stream(grpc_transport* gt, grpc_stream* gs,
                            grpc_closure* then_schedule_closure) {
   stream_obj* s = (stream_obj*)gs;
   null_and_maybe_free_read_buffer(s);
   /* Clean up read_slice_buffer in case there is unread data. */
-  grpc_slice_buffer_destroy_internal(exec_ctx, &s->state.rs.read_slice_buffer);
+  grpc_slice_buffer_destroy_internal(&s->state.rs.read_slice_buffer);
   GRPC_ERROR_UNREF(s->state.cancel_error);
-  GRPC_CLOSURE_SCHED(exec_ctx, then_schedule_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(then_schedule_closure, GRPC_ERROR_NONE);
 }
 
-static void destroy_transport(grpc_exec_ctx* exec_ctx, grpc_transport* gt) {}
+static void destroy_transport(grpc_transport* gt) {}
 
-static grpc_endpoint* get_endpoint(grpc_exec_ctx* exec_ctx,
-                                   grpc_transport* gt) {
-  return nullptr;
-}
+static grpc_endpoint* get_endpoint(grpc_transport* gt) { return nullptr; }
 
-static void perform_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                       grpc_transport_op* op) {}
+static void perform_op(grpc_transport* gt, grpc_transport_op* op) {}
 
 static const grpc_transport_vtable grpc_cronet_vtable = {
     sizeof(stream_obj),
diff --git a/src/core/ext/transport/inproc/inproc_transport.cc b/src/core/ext/transport/inproc/inproc_transport.cc
index d8d753e459..8dd0b7dce2 100644
--- a/src/core/ext/transport/inproc/inproc_transport.cc
+++ b/src/core/ext/transport/inproc/inproc_transport.cc
@@ -54,8 +54,8 @@ typedef struct inproc_transport {
   gpr_refcount refs;
   bool is_client;
   grpc_connectivity_state_tracker connectivity;
-  void (*accept_stream_cb)(grpc_exec_ctx* exec_ctx, void* user_data,
-                           grpc_transport* transport, const void* server_data);
+  void (*accept_stream_cb)(void* user_data, grpc_transport* transport,
+                           const void* server_data);
   void* accept_stream_data;
   bool is_closed;
   struct inproc_transport* other_side;
@@ -118,39 +118,36 @@ typedef struct inproc_stream {
 } inproc_stream;
 
 static grpc_closure do_nothing_closure;
-static bool cancel_stream_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
-                                 grpc_error* error);
-static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
-                             grpc_error* error);
+static bool cancel_stream_locked(inproc_stream* s, grpc_error* error);
+static void op_state_machine(void* arg, grpc_error* error);
 
 static void ref_transport(inproc_transport* t) {
   INPROC_LOG(GPR_DEBUG, "ref_transport %p", t);
   gpr_ref(&t->refs);
 }
 
-static void really_destroy_transport(grpc_exec_ctx* exec_ctx,
-                                     inproc_transport* t) {
+static void really_destroy_transport(inproc_transport* t) {
   INPROC_LOG(GPR_DEBUG, "really_destroy_transport %p", t);
-  grpc_connectivity_state_destroy(exec_ctx, &t->connectivity);
+  grpc_connectivity_state_destroy(&t->connectivity);
   if (gpr_unref(&t->mu->refs)) {
     gpr_free(t->mu);
   }
   gpr_free(t);
 }
 
-static void unref_transport(grpc_exec_ctx* exec_ctx, inproc_transport* t) {
+static void unref_transport(inproc_transport* t) {
   INPROC_LOG(GPR_DEBUG, "unref_transport %p", t);
   if (gpr_unref(&t->refs)) {
-    really_destroy_transport(exec_ctx, t);
+    really_destroy_transport(t);
   }
 }
 
 #ifndef NDEBUG
 #define STREAM_REF(refs, reason) grpc_stream_ref(refs, reason)
-#define STREAM_UNREF(e, refs, reason) grpc_stream_unref(e, refs, reason)
+#define STREAM_UNREF(refs, reason) grpc_stream_unref(refs, reason)
 #else
 #define STREAM_REF(refs, reason) grpc_stream_ref(refs)
-#define STREAM_UNREF(e, refs, reason) grpc_stream_unref(e, refs)
+#define STREAM_UNREF(refs, reason) grpc_stream_unref(refs)
 #endif
 
 static void ref_stream(inproc_stream* s, const char* reason) {
@@ -158,13 +155,12 @@ static void ref_stream(inproc_stream* s, const char* reason) {
   STREAM_REF(s->refs, reason);
 }
 
-static void unref_stream(grpc_exec_ctx* exec_ctx, inproc_stream* s,
-                         const char* reason) {
+static void unref_stream(inproc_stream* s, const char* reason) {
   INPROC_LOG(GPR_DEBUG, "unref_stream %p %s", s, reason);
-  STREAM_UNREF(exec_ctx, s->refs, reason);
+  STREAM_UNREF(s->refs, reason);
 }
 
-static void really_destroy_stream(grpc_exec_ctx* exec_ctx, inproc_stream* s) {
+static void really_destroy_stream(inproc_stream* s) {
   INPROC_LOG(GPR_DEBUG, "really_destroy_stream %p", s);
 
   GRPC_ERROR_UNREF(s->write_buffer_cancel_error);
@@ -172,13 +168,13 @@ static void really_destroy_stream(grpc_exec_ctx* exec_ctx, inproc_stream* s) {
   GRPC_ERROR_UNREF(s->cancel_other_error);
 
   if (s->recv_inited) {
-    grpc_slice_buffer_destroy_internal(exec_ctx, &s->recv_message);
+    grpc_slice_buffer_destroy_internal(&s->recv_message);
   }
 
-  unref_transport(exec_ctx, s->t);
+  unref_transport(s->t);
 
   if (s->closure_at_destroy) {
-    GRPC_CLOSURE_SCHED(exec_ctx, s->closure_at_destroy, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(s->closure_at_destroy, GRPC_ERROR_NONE);
   }
 }
 
@@ -195,7 +191,7 @@ static void log_metadata(const grpc_metadata_batch* md_batch, bool is_client,
   }
 }
 
-static grpc_error* fill_in_metadata(grpc_exec_ctx* exec_ctx, inproc_stream* s,
+static grpc_error* fill_in_metadata(inproc_stream* s,
                                     const grpc_metadata_batch* metadata,
                                     uint32_t flags, grpc_metadata_batch* out_md,
                                     uint32_t* outflags, bool* markfilled) {
@@ -214,18 +210,18 @@ static grpc_error* fill_in_metadata(grpc_exec_ctx* exec_ctx, inproc_stream* s,
        (elem != nullptr) && (error == GRPC_ERROR_NONE); elem = elem->next) {
     grpc_linked_mdelem* nelem =
         (grpc_linked_mdelem*)gpr_arena_alloc(s->arena, sizeof(*nelem));
-    nelem->md = grpc_mdelem_from_slices(
-        exec_ctx, grpc_slice_intern(GRPC_MDKEY(elem->md)),
-        grpc_slice_intern(GRPC_MDVALUE(elem->md)));
+    nelem->md =
+        grpc_mdelem_from_slices(grpc_slice_intern(GRPC_MDKEY(elem->md)),
+                                grpc_slice_intern(GRPC_MDVALUE(elem->md)));
 
-    error = grpc_metadata_batch_link_tail(exec_ctx, out_md, nelem);
+    error = grpc_metadata_batch_link_tail(out_md, nelem);
   }
   return error;
 }
 
-static int init_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                       grpc_stream* gs, grpc_stream_refcount* refcount,
-                       const void* server_data, gpr_arena* arena) {
+static int init_stream(grpc_transport* gt, grpc_stream* gs,
+                       grpc_stream_refcount* refcount, const void* server_data,
+                       gpr_arena* arena) {
   INPROC_LOG(GPR_DEBUG, "init_stream %p %p %p", gt, gs, server_data);
   inproc_transport* t = (inproc_transport*)gt;
   inproc_stream* s = (inproc_stream*)gs;
@@ -285,8 +281,7 @@ static int init_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
                                               // side to avoid destruction
     INPROC_LOG(GPR_DEBUG, "calling accept stream cb %p %p",
                st->accept_stream_cb, st->accept_stream_data);
-    (*st->accept_stream_cb)(exec_ctx, st->accept_stream_data, &st->base,
-                            (void*)s);
+    (*st->accept_stream_cb)(st->accept_stream_data, &st->base, (void*)s);
   } else {
     // This is the server-side and is being called through accept_stream_cb
     inproc_stream* cs = (inproc_stream*)server_data;
@@ -301,19 +296,19 @@ static int init_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
     // Now transfer from the other side's write_buffer if any to the to_read
     // buffer
     if (cs->write_buffer_initial_md_filled) {
-      fill_in_metadata(exec_ctx, s, &cs->write_buffer_initial_md,
+      fill_in_metadata(s, &cs->write_buffer_initial_md,
                        cs->write_buffer_initial_md_flags,
                        &s->to_read_initial_md, &s->to_read_initial_md_flags,
                        &s->to_read_initial_md_filled);
       s->deadline = GPR_MIN(s->deadline, cs->write_buffer_deadline);
-      grpc_metadata_batch_clear(exec_ctx, &cs->write_buffer_initial_md);
+      grpc_metadata_batch_clear(&cs->write_buffer_initial_md);
       cs->write_buffer_initial_md_filled = false;
     }
     if (cs->write_buffer_trailing_md_filled) {
-      fill_in_metadata(exec_ctx, s, &cs->write_buffer_trailing_md, 0,
+      fill_in_metadata(s, &cs->write_buffer_trailing_md, 0,
                        &s->to_read_trailing_md, nullptr,
                        &s->to_read_trailing_md_filled);
-      grpc_metadata_batch_clear(exec_ctx, &cs->write_buffer_trailing_md);
+      grpc_metadata_batch_clear(&cs->write_buffer_trailing_md);
       cs->write_buffer_trailing_md_filled = false;
     }
     if (cs->write_buffer_cancel_error != GRPC_ERROR_NONE) {
@@ -326,11 +321,11 @@ static int init_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
   return 0;  // return value is not important
 }
 
-static void close_stream_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s) {
+static void close_stream_locked(inproc_stream* s) {
   if (!s->closed) {
     // Release the metadata that we would have written out
-    grpc_metadata_batch_destroy(exec_ctx, &s->write_buffer_initial_md);
-    grpc_metadata_batch_destroy(exec_ctx, &s->write_buffer_trailing_md);
+    grpc_metadata_batch_destroy(&s->write_buffer_initial_md);
+    grpc_metadata_batch_destroy(&s->write_buffer_trailing_md);
 
     if (s->listed) {
       inproc_stream* p = s->stream_list_prev;
@@ -344,22 +339,21 @@ static void close_stream_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s) {
         n->stream_list_prev = p;
       }
       s->listed = false;
-      unref_stream(exec_ctx, s, "close_stream:list");
+      unref_stream(s, "close_stream:list");
     }
     s->closed = true;
-    unref_stream(exec_ctx, s, "close_stream:closing");
+    unref_stream(s, "close_stream:closing");
   }
 }
 
 // This function means that we are done talking/listening to the other side
-static void close_other_side_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
-                                    const char* reason) {
+static void close_other_side_locked(inproc_stream* s, const char* reason) {
   if (s->other_side != nullptr) {
     // First release the metadata that came from the other side's arena
-    grpc_metadata_batch_destroy(exec_ctx, &s->to_read_initial_md);
-    grpc_metadata_batch_destroy(exec_ctx, &s->to_read_trailing_md);
+    grpc_metadata_batch_destroy(&s->to_read_initial_md);
+    grpc_metadata_batch_destroy(&s->to_read_trailing_md);
 
-    unref_stream(exec_ctx, s->other_side, reason);
+    unref_stream(s->other_side, reason);
     s->other_side_closed = true;
     s->other_side = nullptr;
   } else if (!s->other_side_closed) {
@@ -371,8 +365,7 @@ static void close_other_side_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
 // this stream_op_batch is only one of the pending operations for this
 // stream. This is called when one of the pending operations for the stream
 // is done and about to be NULLed out
-static void complete_if_batch_end_locked(grpc_exec_ctx* exec_ctx,
-                                         inproc_stream* s, grpc_error* error,
+static void complete_if_batch_end_locked(inproc_stream* s, grpc_error* error,
                                          grpc_transport_stream_op_batch* op,
                                          const char* msg) {
   int is_sm = (int)(op == s->send_message_op);
@@ -383,22 +376,20 @@ static void complete_if_batch_end_locked(grpc_exec_ctx* exec_ctx,
 
   if ((is_sm + is_stm + is_rim + is_rm + is_rtm) == 1) {
     INPROC_LOG(GPR_DEBUG, "%s %p %p %p", msg, s, op, error);
-    GRPC_CLOSURE_SCHED(exec_ctx, op->on_complete, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(op->on_complete, GRPC_ERROR_REF(error));
   }
 }
 
-static void maybe_schedule_op_closure_locked(grpc_exec_ctx* exec_ctx,
-                                             inproc_stream* s,
+static void maybe_schedule_op_closure_locked(inproc_stream* s,
                                              grpc_error* error) {
   if (s && s->ops_needed && !s->op_closure_scheduled) {
-    GRPC_CLOSURE_SCHED(exec_ctx, &s->op_closure, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(&s->op_closure, GRPC_ERROR_REF(error));
     s->op_closure_scheduled = true;
     s->ops_needed = false;
   }
 }
 
-static void fail_helper_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
-                               grpc_error* error) {
+static void fail_helper_locked(inproc_stream* s, grpc_error* error) {
   INPROC_LOG(GPR_DEBUG, "op_state_machine %p fail_helper", s);
   // If we're failing this side, we need to make sure that
   // we also send or have already sent trailing metadata
@@ -415,14 +406,14 @@ static void fail_helper_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
                                     : &other->to_read_trailing_md;
     bool* destfilled = (other == nullptr) ? &s->write_buffer_trailing_md_filled
                                           : &other->to_read_trailing_md_filled;
-    fill_in_metadata(exec_ctx, s, &fake_md, 0, dest, nullptr, destfilled);
-    grpc_metadata_batch_destroy(exec_ctx, &fake_md);
+    fill_in_metadata(s, &fake_md, 0, dest, nullptr, destfilled);
+    grpc_metadata_batch_destroy(&fake_md);
 
     if (other != nullptr) {
       if (other->cancel_other_error == GRPC_ERROR_NONE) {
         other->cancel_other_error = GRPC_ERROR_REF(error);
       }
-      maybe_schedule_op_closure_locked(exec_ctx, other, error);
+      maybe_schedule_op_closure_locked(other, error);
     } else if (s->write_buffer_cancel_error == GRPC_ERROR_NONE) {
       s->write_buffer_cancel_error = GRPC_ERROR_REF(error);
     }
@@ -436,24 +427,22 @@ static void fail_helper_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
       grpc_metadata_batch_init(&fake_md);
       grpc_linked_mdelem* path_md =
           (grpc_linked_mdelem*)gpr_arena_alloc(s->arena, sizeof(*path_md));
-      path_md->md =
-          grpc_mdelem_from_slices(exec_ctx, g_fake_path_key, g_fake_path_value);
-      GPR_ASSERT(grpc_metadata_batch_link_tail(exec_ctx, &fake_md, path_md) ==
+      path_md->md = grpc_mdelem_from_slices(g_fake_path_key, g_fake_path_value);
+      GPR_ASSERT(grpc_metadata_batch_link_tail(&fake_md, path_md) ==
                  GRPC_ERROR_NONE);
       grpc_linked_mdelem* auth_md =
           (grpc_linked_mdelem*)gpr_arena_alloc(s->arena, sizeof(*auth_md));
-      auth_md->md =
-          grpc_mdelem_from_slices(exec_ctx, g_fake_auth_key, g_fake_auth_value);
-      GPR_ASSERT(grpc_metadata_batch_link_tail(exec_ctx, &fake_md, auth_md) ==
+      auth_md->md = grpc_mdelem_from_slices(g_fake_auth_key, g_fake_auth_value);
+      GPR_ASSERT(grpc_metadata_batch_link_tail(&fake_md, auth_md) ==
                  GRPC_ERROR_NONE);
 
       fill_in_metadata(
-          exec_ctx, s, &fake_md, 0,
+          s, &fake_md, 0,
           s->recv_initial_md_op->payload->recv_initial_metadata
               .recv_initial_metadata,
           s->recv_initial_md_op->payload->recv_initial_metadata.recv_flags,
           nullptr);
-      grpc_metadata_batch_destroy(exec_ctx, &fake_md);
+      grpc_metadata_batch_destroy(&fake_md);
       err = GRPC_ERROR_NONE;
     } else {
       err = GRPC_ERROR_REF(error);
@@ -469,14 +458,13 @@ static void fail_helper_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
     INPROC_LOG(GPR_DEBUG,
                "fail_helper %p scheduling initial-metadata-ready %p %p", s,
                error, err);
-    GRPC_CLOSURE_SCHED(exec_ctx,
-                       s->recv_initial_md_op->payload->recv_initial_metadata
+    GRPC_CLOSURE_SCHED(s->recv_initial_md_op->payload->recv_initial_metadata
                            .recv_initial_metadata_ready,
                        err);
     // Last use of err so no need to REF and then UNREF it
 
     complete_if_batch_end_locked(
-        exec_ctx, s, error, s->recv_initial_md_op,
+        s, error, s->recv_initial_md_op,
         "fail_helper scheduling recv-initial-metadata-on-complete");
     s->recv_initial_md_op = nullptr;
   }
@@ -484,22 +472,22 @@ static void fail_helper_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
     INPROC_LOG(GPR_DEBUG, "fail_helper %p scheduling message-ready %p", s,
                error);
     GRPC_CLOSURE_SCHED(
-        exec_ctx, s->recv_message_op->payload->recv_message.recv_message_ready,
+        s->recv_message_op->payload->recv_message.recv_message_ready,
         GRPC_ERROR_REF(error));
     complete_if_batch_end_locked(
-        exec_ctx, s, error, s->recv_message_op,
+        s, error, s->recv_message_op,
         "fail_helper scheduling recv-message-on-complete");
     s->recv_message_op = nullptr;
   }
   if (s->send_message_op) {
     complete_if_batch_end_locked(
-        exec_ctx, s, error, s->send_message_op,
+        s, error, s->send_message_op,
         "fail_helper scheduling send-message-on-complete");
     s->send_message_op = nullptr;
   }
   if (s->send_trailing_md_op) {
     complete_if_batch_end_locked(
-        exec_ctx, s, error, s->send_trailing_md_op,
+        s, error, s->send_trailing_md_op,
         "fail_helper scheduling send-trailng-md-on-complete");
     s->send_trailing_md_op = nullptr;
   }
@@ -508,23 +496,22 @@ static void fail_helper_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
                "fail_helper %p scheduling trailing-md-on-complete %p", s,
                error);
     complete_if_batch_end_locked(
-        exec_ctx, s, error, s->recv_trailing_md_op,
+        s, error, s->recv_trailing_md_op,
         "fail_helper scheduling recv-trailing-metadata-on-complete");
     s->recv_trailing_md_op = nullptr;
   }
-  close_other_side_locked(exec_ctx, s, "fail_helper:other_side");
-  close_stream_locked(exec_ctx, s);
+  close_other_side_locked(s, "fail_helper:other_side");
+  close_stream_locked(s);
 
   GRPC_ERROR_UNREF(error);
 }
 
-static void message_transfer_locked(grpc_exec_ctx* exec_ctx,
-                                    inproc_stream* sender,
+static void message_transfer_locked(inproc_stream* sender,
                                     inproc_stream* receiver) {
   size_t remaining =
       sender->send_message_op->payload->send_message.send_message->length;
   if (receiver->recv_inited) {
-    grpc_slice_buffer_destroy_internal(exec_ctx, &receiver->recv_message);
+    grpc_slice_buffer_destroy_internal(&receiver->recv_message);
   }
   grpc_slice_buffer_init(&receiver->recv_message);
   receiver->recv_inited = true;
@@ -532,13 +519,13 @@ static void message_transfer_locked(grpc_exec_ctx* exec_ctx,
     grpc_slice message_slice;
     grpc_closure unused;
     GPR_ASSERT(grpc_byte_stream_next(
-        exec_ctx, sender->send_message_op->payload->send_message.send_message,
-        SIZE_MAX, &unused));
+        sender->send_message_op->payload->send_message.send_message, SIZE_MAX,
+        &unused));
     grpc_error* error = grpc_byte_stream_pull(
-        exec_ctx, sender->send_message_op->payload->send_message.send_message,
+        sender->send_message_op->payload->send_message.send_message,
         &message_slice);
     if (error != GRPC_ERROR_NONE) {
-      cancel_stream_locked(exec_ctx, sender, GRPC_ERROR_REF(error));
+      cancel_stream_locked(sender, GRPC_ERROR_REF(error));
       break;
     }
     GPR_ASSERT(error == GRPC_ERROR_NONE);
@@ -553,22 +540,20 @@ static void message_transfer_locked(grpc_exec_ctx* exec_ctx,
   INPROC_LOG(GPR_DEBUG, "message_transfer_locked %p scheduling message-ready",
              receiver);
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       receiver->recv_message_op->payload->recv_message.recv_message_ready,
       GRPC_ERROR_NONE);
   complete_if_batch_end_locked(
-      exec_ctx, sender, GRPC_ERROR_NONE, sender->send_message_op,
+      sender, GRPC_ERROR_NONE, sender->send_message_op,
       "message_transfer scheduling sender on_complete");
   complete_if_batch_end_locked(
-      exec_ctx, receiver, GRPC_ERROR_NONE, receiver->recv_message_op,
+      receiver, GRPC_ERROR_NONE, receiver->recv_message_op,
       "message_transfer scheduling receiver on_complete");
 
   receiver->recv_message_op = nullptr;
   sender->send_message_op = nullptr;
 }
 
-static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
-                             grpc_error* error) {
+static void op_state_machine(void* arg, grpc_error* error) {
   // This function gets called when we have contents in the unprocessed reads
   // Get what we want based on our ops wanted
   // Schedule our appropriate closures
@@ -589,26 +574,26 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
   inproc_stream* other = s->other_side;
 
   if (s->cancel_self_error != GRPC_ERROR_NONE) {
-    fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(s->cancel_self_error));
+    fail_helper_locked(s, GRPC_ERROR_REF(s->cancel_self_error));
     goto done;
   } else if (s->cancel_other_error != GRPC_ERROR_NONE) {
-    fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(s->cancel_other_error));
+    fail_helper_locked(s, GRPC_ERROR_REF(s->cancel_other_error));
     goto done;
   } else if (error != GRPC_ERROR_NONE) {
-    fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(error));
+    fail_helper_locked(s, GRPC_ERROR_REF(error));
     goto done;
   }
 
   if (s->send_message_op && other) {
     if (other->recv_message_op) {
-      message_transfer_locked(exec_ctx, s, other);
-      maybe_schedule_op_closure_locked(exec_ctx, other, GRPC_ERROR_NONE);
+      message_transfer_locked(s, other);
+      maybe_schedule_op_closure_locked(other, GRPC_ERROR_NONE);
     } else if (!s->t->is_client &&
                (s->trailing_md_sent || other->recv_trailing_md_op)) {
       // A server send will never be matched if the client is waiting
       // for trailing metadata already
       complete_if_batch_end_locked(
-          exec_ctx, s, GRPC_ERROR_NONE, s->send_message_op,
+          s, GRPC_ERROR_NONE, s->send_message_op,
           "op_state_machine scheduling send-message-on-complete");
       s->send_message_op = nullptr;
     }
@@ -630,11 +615,11 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
       // The buffer is already in use; that's an error!
       INPROC_LOG(GPR_DEBUG, "Extra trailing metadata %p", s);
       new_err = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Extra trailing metadata");
-      fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(new_err));
+      fail_helper_locked(s, GRPC_ERROR_REF(new_err));
       goto done;
     } else {
       if (!other || !other->closed) {
-        fill_in_metadata(exec_ctx, s,
+        fill_in_metadata(s,
                          s->send_trailing_md_op->payload->send_trailing_metadata
                              .send_trailing_metadata,
                          0, dest, nullptr, destfilled);
@@ -643,15 +628,15 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
       if (!s->t->is_client && s->trailing_md_recvd && s->recv_trailing_md_op) {
         INPROC_LOG(GPR_DEBUG,
                    "op_state_machine %p scheduling trailing-md-on-complete", s);
-        GRPC_CLOSURE_SCHED(exec_ctx, s->recv_trailing_md_op->on_complete,
+        GRPC_CLOSURE_SCHED(s->recv_trailing_md_op->on_complete,
                            GRPC_ERROR_NONE);
         s->recv_trailing_md_op = nullptr;
         needs_close = true;
       }
     }
-    maybe_schedule_op_closure_locked(exec_ctx, other, GRPC_ERROR_NONE);
+    maybe_schedule_op_closure_locked(other, GRPC_ERROR_NONE);
     complete_if_batch_end_locked(
-        exec_ctx, s, GRPC_ERROR_NONE, s->send_trailing_md_op,
+        s, GRPC_ERROR_NONE, s->send_trailing_md_op,
         "op_state_machine scheduling send-trailing-metadata-on-complete");
     s->send_trailing_md_op = nullptr;
   }
@@ -664,14 +649,14 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
           "op_state_machine %p scheduling on_complete errors for already "
           "recvd initial md %p",
           s, new_err);
-      fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(new_err));
+      fail_helper_locked(s, GRPC_ERROR_REF(new_err));
       goto done;
     }
 
     if (s->to_read_initial_md_filled) {
       s->initial_md_recvd = true;
       new_err = fill_in_metadata(
-          exec_ctx, s, &s->to_read_initial_md, s->to_read_initial_md_flags,
+          s, &s->to_read_initial_md, s->to_read_initial_md_flags,
           s->recv_initial_md_op->payload->recv_initial_metadata
               .recv_initial_metadata,
           s->recv_initial_md_op->payload->recv_initial_metadata.recv_flags,
@@ -684,17 +669,16 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
              .trailing_metadata_available =
             (other != nullptr && other->send_trailing_md_op != nullptr);
       }
-      grpc_metadata_batch_clear(exec_ctx, &s->to_read_initial_md);
+      grpc_metadata_batch_clear(&s->to_read_initial_md);
       s->to_read_initial_md_filled = false;
       INPROC_LOG(GPR_DEBUG,
                  "op_state_machine %p scheduling initial-metadata-ready %p", s,
                  new_err);
-      GRPC_CLOSURE_SCHED(exec_ctx,
-                         s->recv_initial_md_op->payload->recv_initial_metadata
+      GRPC_CLOSURE_SCHED(s->recv_initial_md_op->payload->recv_initial_metadata
                              .recv_initial_metadata_ready,
                          GRPC_ERROR_REF(new_err));
       complete_if_batch_end_locked(
-          exec_ctx, s, new_err, s->recv_initial_md_op,
+          s, new_err, s->recv_initial_md_op,
           "op_state_machine scheduling recv-initial-metadata-on-complete");
       s->recv_initial_md_op = nullptr;
 
@@ -702,20 +686,20 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
         INPROC_LOG(GPR_DEBUG,
                    "op_state_machine %p scheduling on_complete errors2 %p", s,
                    new_err);
-        fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(new_err));
+        fail_helper_locked(s, GRPC_ERROR_REF(new_err));
         goto done;
       }
     }
   }
   if (s->recv_message_op) {
     if (other && other->send_message_op) {
-      message_transfer_locked(exec_ctx, other, s);
-      maybe_schedule_op_closure_locked(exec_ctx, other, GRPC_ERROR_NONE);
+      message_transfer_locked(other, s);
+      maybe_schedule_op_closure_locked(other, GRPC_ERROR_NONE);
     }
   }
   if (s->recv_trailing_md_op && s->t->is_client && other &&
       other->send_message_op) {
-    maybe_schedule_op_closure_locked(exec_ctx, other, GRPC_ERROR_NONE);
+    maybe_schedule_op_closure_locked(other, GRPC_ERROR_NONE);
   }
   if (s->to_read_trailing_md_filled) {
     if (s->trailing_md_recvd) {
@@ -726,7 +710,7 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
           "op_state_machine %p scheduling on_complete errors for already "
           "recvd trailing md %p",
           s, new_err);
-      fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(new_err));
+      fail_helper_locked(s, GRPC_ERROR_REF(new_err));
       goto done;
     }
     if (s->recv_message_op != nullptr) {
@@ -734,11 +718,10 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
       // satisfied
       INPROC_LOG(GPR_DEBUG, "op_state_machine %p scheduling message-ready", s);
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           s->recv_message_op->payload->recv_message.recv_message_ready,
           GRPC_ERROR_NONE);
       complete_if_batch_end_locked(
-          exec_ctx, s, new_err, s->recv_message_op,
+          s, new_err, s->recv_message_op,
           "op_state_machine scheduling recv-message-on-complete");
       s->recv_message_op = nullptr;
     }
@@ -746,7 +729,7 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
       // Nothing further will try to receive from this stream, so finish off
       // any outstanding send_message op
       complete_if_batch_end_locked(
-          exec_ctx, s, new_err, s->send_message_op,
+          s, new_err, s->send_message_op,
           "op_state_machine scheduling send-message-on-complete");
       s->send_message_op = nullptr;
     }
@@ -754,11 +737,11 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
       // We wanted trailing metadata and we got it
       s->trailing_md_recvd = true;
       new_err =
-          fill_in_metadata(exec_ctx, s, &s->to_read_trailing_md, 0,
+          fill_in_metadata(s, &s->to_read_trailing_md, 0,
                            s->recv_trailing_md_op->payload
                                ->recv_trailing_metadata.recv_trailing_metadata,
                            nullptr, nullptr);
-      grpc_metadata_batch_clear(exec_ctx, &s->to_read_trailing_md);
+      grpc_metadata_batch_clear(&s->to_read_trailing_md);
       s->to_read_trailing_md_filled = false;
 
       // We should schedule the recv_trailing_md_op completion if
@@ -770,7 +753,7 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
         INPROC_LOG(GPR_DEBUG,
                    "op_state_machine %p scheduling trailing-md-on-complete %p",
                    s, new_err);
-        GRPC_CLOSURE_SCHED(exec_ctx, s->recv_trailing_md_op->on_complete,
+        GRPC_CLOSURE_SCHED(s->recv_trailing_md_op->on_complete,
                            GRPC_ERROR_REF(new_err));
         s->recv_trailing_md_op = nullptr;
         needs_close = true;
@@ -791,10 +774,10 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
     // recv_message_op
     INPROC_LOG(GPR_DEBUG, "op_state_machine %p scheduling message-ready", s);
     GRPC_CLOSURE_SCHED(
-        exec_ctx, s->recv_message_op->payload->recv_message.recv_message_ready,
+        s->recv_message_op->payload->recv_message.recv_message_ready,
         GRPC_ERROR_NONE);
     complete_if_batch_end_locked(
-        exec_ctx, s, new_err, s->recv_message_op,
+        s, new_err, s->recv_message_op,
         "op_state_machine scheduling recv-message-on-complete");
     s->recv_message_op = nullptr;
   }
@@ -803,7 +786,7 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
     // Nothing further will try to receive from this stream, so finish off
     // any outstanding send_message op
     complete_if_batch_end_locked(
-        exec_ctx, s, new_err, s->send_message_op,
+        s, new_err, s->send_message_op,
         "op_state_machine scheduling send-message-on-complete");
     s->send_message_op = nullptr;
   }
@@ -819,22 +802,21 @@ static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
   }
 done:
   if (needs_close) {
-    close_other_side_locked(exec_ctx, s, "op_state_machine");
-    close_stream_locked(exec_ctx, s);
+    close_other_side_locked(s, "op_state_machine");
+    close_stream_locked(s);
   }
   gpr_mu_unlock(mu);
   GRPC_ERROR_UNREF(new_err);
 }
 
-static bool cancel_stream_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
-                                 grpc_error* error) {
+static bool cancel_stream_locked(inproc_stream* s, grpc_error* error) {
   bool ret = false;  // was the cancel accepted
   INPROC_LOG(GPR_DEBUG, "cancel_stream %p with %s", s,
              grpc_error_string(error));
   if (s->cancel_self_error == GRPC_ERROR_NONE) {
     ret = true;
     s->cancel_self_error = GRPC_ERROR_REF(error);
-    maybe_schedule_op_closure_locked(exec_ctx, s, s->cancel_self_error);
+    maybe_schedule_op_closure_locked(s, s->cancel_self_error);
     // Send trailing md to the other side indicating cancellation, even if we
     // already have
     s->trailing_md_sent = true;
@@ -848,15 +830,14 @@ static bool cancel_stream_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
                                     : &other->to_read_trailing_md;
     bool* destfilled = (other == nullptr) ? &s->write_buffer_trailing_md_filled
                                           : &other->to_read_trailing_md_filled;
-    fill_in_metadata(exec_ctx, s, &cancel_md, 0, dest, nullptr, destfilled);
-    grpc_metadata_batch_destroy(exec_ctx, &cancel_md);
+    fill_in_metadata(s, &cancel_md, 0, dest, nullptr, destfilled);
+    grpc_metadata_batch_destroy(&cancel_md);
 
     if (other != nullptr) {
       if (other->cancel_other_error == GRPC_ERROR_NONE) {
         other->cancel_other_error = GRPC_ERROR_REF(s->cancel_self_error);
       }
-      maybe_schedule_op_closure_locked(exec_ctx, other,
-                                       other->cancel_other_error);
+      maybe_schedule_op_closure_locked(other, other->cancel_other_error);
     } else if (s->write_buffer_cancel_error == GRPC_ERROR_NONE) {
       s->write_buffer_cancel_error = GRPC_ERROR_REF(s->cancel_self_error);
     }
@@ -866,21 +847,20 @@ static bool cancel_stream_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
     // md, now's the chance
     if (!s->t->is_client && s->trailing_md_recvd && s->recv_trailing_md_op) {
       complete_if_batch_end_locked(
-          exec_ctx, s, s->cancel_self_error, s->recv_trailing_md_op,
+          s, s->cancel_self_error, s->recv_trailing_md_op,
           "cancel_stream scheduling trailing-md-on-complete");
       s->recv_trailing_md_op = nullptr;
     }
   }
 
-  close_other_side_locked(exec_ctx, s, "cancel_stream:other_side");
-  close_stream_locked(exec_ctx, s);
+  close_other_side_locked(s, "cancel_stream:other_side");
+  close_stream_locked(s);
 
   GRPC_ERROR_UNREF(error);
   return ret;
 }
 
-static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                              grpc_stream* gs,
+static void perform_stream_op(grpc_transport* gt, grpc_stream* gs,
                               grpc_transport_stream_op_batch* op) {
   INPROC_LOG(GPR_DEBUG, "perform_stream_op %p %p %p", gt, gs, op);
   inproc_stream* s = (inproc_stream*)gs;
@@ -906,7 +886,7 @@ static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
   if (op->cancel_stream) {
     // Call cancel_stream_locked without ref'ing the cancel_error because
     // this function is responsible to make sure that that field gets unref'ed
-    cancel_stream_locked(exec_ctx, s, op->payload->cancel_stream.cancel_error);
+    cancel_stream_locked(s, op->payload->cancel_stream.cancel_error);
     // this op can complete without an error
   } else if (s->cancel_self_error != GRPC_ERROR_NONE) {
     // already self-canceled so still give it an error
@@ -946,8 +926,7 @@ static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
       } else {
         if (!other || !other->closed) {
           fill_in_metadata(
-              exec_ctx, s,
-              op->payload->send_initial_metadata.send_initial_metadata,
+              s, op->payload->send_initial_metadata.send_initial_metadata,
               op->payload->send_initial_metadata.send_initial_metadata_flags,
               dest, destflags, destfilled);
         }
@@ -959,7 +938,7 @@ static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
           s->initial_md_sent = true;
         }
       }
-      maybe_schedule_op_closure_locked(exec_ctx, other, error);
+      maybe_schedule_op_closure_locked(other, error);
     }
   }
 
@@ -999,7 +978,7 @@ static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
         (op->recv_message && other && (other->send_message_op != nullptr)) ||
         (s->to_read_trailing_md_filled || s->trailing_md_recvd)) {
       if (!s->op_closure_scheduled) {
-        GRPC_CLOSURE_SCHED(exec_ctx, &s->op_closure, GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(&s->op_closure, GRPC_ERROR_NONE);
         s->op_closure_scheduled = true;
       }
     } else {
@@ -1023,7 +1002,6 @@ static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
             "perform_stream_op error %p scheduling initial-metadata-ready %p",
             s, error);
         GRPC_CLOSURE_SCHED(
-            exec_ctx,
             op->payload->recv_initial_metadata.recv_initial_metadata_ready,
             GRPC_ERROR_REF(error));
       }
@@ -1032,28 +1010,26 @@ static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
             GPR_DEBUG,
             "perform_stream_op error %p scheduling recv message-ready %p", s,
             error);
-        GRPC_CLOSURE_SCHED(exec_ctx,
-                           op->payload->recv_message.recv_message_ready,
+        GRPC_CLOSURE_SCHED(op->payload->recv_message.recv_message_ready,
                            GRPC_ERROR_REF(error));
       }
     }
     INPROC_LOG(GPR_DEBUG, "perform_stream_op %p scheduling on_complete %p", s,
                error);
-    GRPC_CLOSURE_SCHED(exec_ctx, on_complete, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(on_complete, GRPC_ERROR_REF(error));
   }
   if (needs_close) {
-    close_other_side_locked(exec_ctx, s, "perform_stream_op:other_side");
-    close_stream_locked(exec_ctx, s);
+    close_other_side_locked(s, "perform_stream_op:other_side");
+    close_stream_locked(s);
   }
   gpr_mu_unlock(mu);
   GRPC_ERROR_UNREF(error);
 }
 
-static void close_transport_locked(grpc_exec_ctx* exec_ctx,
-                                   inproc_transport* t) {
+static void close_transport_locked(inproc_transport* t) {
   INPROC_LOG(GPR_DEBUG, "close_transport %p %d", t, t->is_closed);
   grpc_connectivity_state_set(
-      exec_ctx, &t->connectivity, GRPC_CHANNEL_SHUTDOWN,
+      &t->connectivity, GRPC_CHANNEL_SHUTDOWN,
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("Closing transport."),
       "close transport");
   if (!t->is_closed) {
@@ -1062,7 +1038,7 @@ static void close_transport_locked(grpc_exec_ctx* exec_ctx,
     while (t->stream_list != nullptr) {
       // cancel_stream_locked also adjusts stream list
       cancel_stream_locked(
-          exec_ctx, t->stream_list,
+          t->stream_list,
           grpc_error_set_int(
               GRPC_ERROR_CREATE_FROM_STATIC_STRING("Transport closed"),
               GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE));
@@ -1070,14 +1046,13 @@ static void close_transport_locked(grpc_exec_ctx* exec_ctx,
   }
 }
 
-static void perform_transport_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                                 grpc_transport_op* op) {
+static void perform_transport_op(grpc_transport* gt, grpc_transport_op* op) {
   inproc_transport* t = (inproc_transport*)gt;
   INPROC_LOG(GPR_DEBUG, "perform_transport_op %p %p", t, op);
   gpr_mu_lock(&t->mu->mu);
   if (op->on_connectivity_state_change) {
     grpc_connectivity_state_notify_on_state_change(
-        exec_ctx, &t->connectivity, op->connectivity_state,
+        &t->connectivity, op->connectivity_state,
         op->on_connectivity_state_change);
   }
   if (op->set_accept_stream) {
@@ -1085,7 +1060,7 @@ static void perform_transport_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
     t->accept_stream_data = op->set_accept_stream_user_data;
   }
   if (op->on_consumed) {
-    GRPC_CLOSURE_SCHED(exec_ctx, op->on_consumed, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(op->on_consumed, GRPC_ERROR_NONE);
   }
 
   bool do_close = false;
@@ -1099,71 +1074,67 @@ static void perform_transport_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
   }
 
   if (do_close) {
-    close_transport_locked(exec_ctx, t);
+    close_transport_locked(t);
   }
   gpr_mu_unlock(&t->mu->mu);
 }
 
-static void destroy_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                           grpc_stream* gs,
+static void destroy_stream(grpc_transport* gt, grpc_stream* gs,
                            grpc_closure* then_schedule_closure) {
   INPROC_LOG(GPR_DEBUG, "destroy_stream %p %p", gs, then_schedule_closure);
   inproc_stream* s = (inproc_stream*)gs;
   s->closure_at_destroy = then_schedule_closure;
-  really_destroy_stream(exec_ctx, s);
+  really_destroy_stream(s);
 }
 
-static void destroy_transport(grpc_exec_ctx* exec_ctx, grpc_transport* gt) {
+static void destroy_transport(grpc_transport* gt) {
   inproc_transport* t = (inproc_transport*)gt;
   INPROC_LOG(GPR_DEBUG, "destroy_transport %p", t);
   gpr_mu_lock(&t->mu->mu);
-  close_transport_locked(exec_ctx, t);
+  close_transport_locked(t);
   gpr_mu_unlock(&t->mu->mu);
-  unref_transport(exec_ctx, t->other_side);
-  unref_transport(exec_ctx, t);
+  unref_transport(t->other_side);
+  unref_transport(t);
 }
 
 /*******************************************************************************
  * INTEGRATION GLUE
  */
 
-static void set_pollset(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                        grpc_stream* gs, grpc_pollset* pollset) {
+static void set_pollset(grpc_transport* gt, grpc_stream* gs,
+                        grpc_pollset* pollset) {
   // Nothing to do here
 }
 
-static void set_pollset_set(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                            grpc_stream* gs, grpc_pollset_set* pollset_set) {
+static void set_pollset_set(grpc_transport* gt, grpc_stream* gs,
+                            grpc_pollset_set* pollset_set) {
   // Nothing to do here
 }
 
-static grpc_endpoint* get_endpoint(grpc_exec_ctx* exec_ctx, grpc_transport* t) {
-  return nullptr;
-}
+static grpc_endpoint* get_endpoint(grpc_transport* t) { return nullptr; }
 
 /*******************************************************************************
  * GLOBAL INIT AND DESTROY
  */
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void do_nothing(void* arg, grpc_error* error) {}
 
 void grpc_inproc_transport_init(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_CLOSURE_INIT(&do_nothing_closure, do_nothing, nullptr,
                     grpc_schedule_on_exec_ctx);
   g_empty_slice = grpc_slice_from_static_buffer(nullptr, 0);
 
   grpc_slice key_tmp = grpc_slice_from_static_string(":path");
   g_fake_path_key = grpc_slice_intern(key_tmp);
-  grpc_slice_unref_internal(&exec_ctx, key_tmp);
+  grpc_slice_unref_internal(key_tmp);
 
   g_fake_path_value = grpc_slice_from_static_string("/");
 
   grpc_slice auth_tmp = grpc_slice_from_static_string(":authority");
   g_fake_auth_key = grpc_slice_intern(auth_tmp);
-  grpc_slice_unref_internal(&exec_ctx, auth_tmp);
+  grpc_slice_unref_internal(auth_tmp);
 
   g_fake_auth_value = grpc_slice_from_static_string("inproc-fail");
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static const grpc_transport_vtable inproc_vtable = {
@@ -1175,8 +1146,7 @@ static const grpc_transport_vtable inproc_vtable = {
 /*******************************************************************************
  * Main inproc transport functions
  */
-static void inproc_transports_create(grpc_exec_ctx* exec_ctx,
-                                     grpc_transport** server_transport,
+static void inproc_transports_create(grpc_transport** server_transport,
                                      const grpc_channel_args* server_args,
                                      grpc_transport** client_transport,
                                      const grpc_channel_args* client_args) {
@@ -1213,7 +1183,7 @@ grpc_channel* grpc_inproc_channel_create(grpc_server* server,
   GRPC_API_TRACE("grpc_inproc_channel_create(server=%p, args=%p)", 2,
                  (server, args));
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   const grpc_channel_args* server_args = grpc_server_get_channel_args(server);
 
@@ -1228,30 +1198,26 @@ grpc_channel* grpc_inproc_channel_create(grpc_server* server,
 
   grpc_transport* server_transport;
   grpc_transport* client_transport;
-  inproc_transports_create(&exec_ctx, &server_transport, server_args,
-                           &client_transport, client_args);
+  inproc_transports_create(&server_transport, server_args, &client_transport,
+                           client_args);
 
-  grpc_server_setup_transport(&exec_ctx, server, server_transport, nullptr,
-                              server_args);
-  grpc_channel* channel =
-      grpc_channel_create(&exec_ctx, "inproc", client_args,
-                          GRPC_CLIENT_DIRECT_CHANNEL, client_transport);
+  grpc_server_setup_transport(server, server_transport, nullptr, server_args);
+  grpc_channel* channel = grpc_channel_create(
+      "inproc", client_args, GRPC_CLIENT_DIRECT_CHANNEL, client_transport);
 
   // Free up created channel args
-  grpc_channel_args_destroy(&exec_ctx, client_args);
+  grpc_channel_args_destroy(client_args);
 
   // Now finish scheduled operations
-  grpc_exec_ctx_finish(&exec_ctx);
 
   return channel;
 }
 
 void grpc_inproc_transport_shutdown(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_unref_internal(&exec_ctx, g_empty_slice);
-  grpc_slice_unref_internal(&exec_ctx, g_fake_path_key);
-  grpc_slice_unref_internal(&exec_ctx, g_fake_path_value);
-  grpc_slice_unref_internal(&exec_ctx, g_fake_auth_key);
-  grpc_slice_unref_internal(&exec_ctx, g_fake_auth_value);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_unref_internal(g_empty_slice);
+  grpc_slice_unref_internal(g_fake_path_key);
+  grpc_slice_unref_internal(g_fake_path_value);
+  grpc_slice_unref_internal(g_fake_auth_key);
+  grpc_slice_unref_internal(g_fake_auth_value);
 }
diff --git a/src/core/lib/backoff/backoff.cc b/src/core/lib/backoff/backoff.cc
index 500b3d6a8a..41f625a636 100644
--- a/src/core/lib/backoff/backoff.cc
+++ b/src/core/lib/backoff/backoff.cc
@@ -47,12 +47,12 @@ BackOff::BackOff(const Options& options) : options_(options) {
   rng_state_ = static_cast<uint32_t>(gpr_now(GPR_CLOCK_REALTIME).tv_nsec);
 }
 
-grpc_millis BackOff::Begin(grpc_exec_ctx* exec_ctx) {
+grpc_millis BackOff::Begin() {
   current_backoff_ = options_.initial_backoff();
-  return current_backoff_ + grpc_exec_ctx_now(exec_ctx);
+  return current_backoff_ + grpc_core::ExecCtx::Get()->Now();
 }
 
-grpc_millis BackOff::Step(grpc_exec_ctx* exec_ctx) {
+grpc_millis BackOff::Step() {
   current_backoff_ =
       (grpc_millis)(std::min(current_backoff_ * options_.multiplier(),
                              (double)options_.max_backoff()));
@@ -60,7 +60,7 @@ grpc_millis BackOff::Step(grpc_exec_ctx* exec_ctx) {
       &rng_state_, -options_.jitter() * current_backoff_,
       options_.jitter() * current_backoff_);
   const grpc_millis next_timeout = (grpc_millis)(current_backoff_ + jitter);
-  return next_timeout + grpc_exec_ctx_now(exec_ctx);
+  return next_timeout + grpc_core::ExecCtx::Get()->Now();
 }
 
 void BackOff::Reset() { current_backoff_ = options_.initial_backoff(); }
diff --git a/src/core/lib/backoff/backoff.h b/src/core/lib/backoff/backoff.h
index 6f2c30d42f..84ef9b82e4 100644
--- a/src/core/lib/backoff/backoff.h
+++ b/src/core/lib/backoff/backoff.h
@@ -34,10 +34,10 @@ class BackOff {
 
   /// Begin retry loop: returns the deadline to be used for the next attempt,
   /// following the backoff strategy.
-  grpc_millis Begin(grpc_exec_ctx* exec_ctx);
+  grpc_millis Begin();
   /// Step a retry loop: returns the deadline to be used for the next attempt,
   /// following the backoff strategy.
-  grpc_millis Step(grpc_exec_ctx* exec_ctx);
+  grpc_millis Step();
   /// Reset the backoff, so the next grpc_backoff_step will be a
   /// grpc_backoff_begin.
   void Reset();
diff --git a/src/core/lib/channel/channel_args.cc b/src/core/lib/channel/channel_args.cc
index 735fcbe405..578475b248 100644
--- a/src/core/lib/channel/channel_args.cc
+++ b/src/core/lib/channel/channel_args.cc
@@ -188,7 +188,7 @@ grpc_channel_args* grpc_channel_args_normalize(const grpc_channel_args* a) {
   return b;
 }
 
-void grpc_channel_args_destroy(grpc_exec_ctx* exec_ctx, grpc_channel_args* a) {
+void grpc_channel_args_destroy(grpc_channel_args* a) {
   size_t i;
   if (!a) return;
   for (i = 0; i < a->num_args; i++) {
@@ -199,8 +199,7 @@ void grpc_channel_args_destroy(grpc_exec_ctx* exec_ctx, grpc_channel_args* a) {
       case GRPC_ARG_INTEGER:
         break;
       case GRPC_ARG_POINTER:
-        a->args[i].value.pointer.vtable->destroy(exec_ctx,
-                                                 a->args[i].value.pointer.p);
+        a->args[i].value.pointer.vtable->destroy(a->args[i].value.pointer.p);
         break;
     }
     gpr_free(a->args[i].key);
@@ -299,8 +298,7 @@ static int find_stream_compression_algorithm_states_bitset(
 }
 
 grpc_channel_args* grpc_channel_args_compression_algorithm_set_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_args** a,
-    grpc_compression_algorithm algorithm, int state) {
+    grpc_channel_args** a, grpc_compression_algorithm algorithm, int state) {
   int* states_arg = nullptr;
   grpc_channel_args* result = *a;
   const int states_arg_found =
@@ -333,15 +331,15 @@ grpc_channel_args* grpc_channel_args_compression_algorithm_set_state(
       GPR_BITCLEAR((unsigned*)&tmp.value.integer, algorithm);
     }
     result = grpc_channel_args_copy_and_add(*a, &tmp, 1);
-    grpc_channel_args_destroy(exec_ctx, *a);
+    grpc_channel_args_destroy(*a);
     *a = result;
   }
   return result;
 }
 
 grpc_channel_args* grpc_channel_args_stream_compression_algorithm_set_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_args** a,
-    grpc_stream_compression_algorithm algorithm, int state) {
+    grpc_channel_args** a, grpc_stream_compression_algorithm algorithm,
+    int state) {
   int* states_arg = nullptr;
   grpc_channel_args* result = *a;
   const int states_arg_found =
@@ -375,7 +373,7 @@ grpc_channel_args* grpc_channel_args_stream_compression_algorithm_set_state(
       GPR_BITCLEAR((unsigned*)&tmp.value.integer, algorithm);
     }
     result = grpc_channel_args_copy_and_add(*a, &tmp, 1);
-    grpc_channel_args_destroy(exec_ctx, *a);
+    grpc_channel_args_destroy(*a);
     *a = result;
   }
   return result;
diff --git a/src/core/lib/channel/channel_args.h b/src/core/lib/channel/channel_args.h
index f6cb7fa73d..9c7d06f34e 100644
--- a/src/core/lib/channel/channel_args.h
+++ b/src/core/lib/channel/channel_args.h
@@ -53,7 +53,7 @@ grpc_channel_args* grpc_channel_args_union(const grpc_channel_args* a,
                                            const grpc_channel_args* b);
 
 /** Destroy arguments created by \a grpc_channel_args_copy */
-void grpc_channel_args_destroy(grpc_exec_ctx* exec_ctx, grpc_channel_args* a);
+void grpc_channel_args_destroy(grpc_channel_args* a);
 
 /** Returns the compression algorithm set in \a a. */
 grpc_compression_algorithm grpc_channel_args_get_compression_algorithm(
@@ -85,8 +85,7 @@ grpc_channel_args* grpc_channel_args_set_stream_compression_algorithm(
  * modified to point to the returned instance (which may be different from the
  * input value of \a a). */
 grpc_channel_args* grpc_channel_args_compression_algorithm_set_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_args** a,
-    grpc_compression_algorithm algorithm, int enabled);
+    grpc_channel_args** a, grpc_compression_algorithm algorithm, int enabled);
 
 /** Sets the support for the given stream compression algorithm. By default, all
  * stream compression algorithms are enabled. It's an error to disable an
@@ -96,8 +95,8 @@ grpc_channel_args* grpc_channel_args_compression_algorithm_set_state(
  * modified to point to the returned instance (which may be different from the
  * input value of \a a). */
 grpc_channel_args* grpc_channel_args_stream_compression_algorithm_set_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_args** a,
-    grpc_stream_compression_algorithm algorithm, int enabled);
+    grpc_channel_args** a, grpc_stream_compression_algorithm algorithm,
+    int enabled);
 
 /** Returns the bitset representing the support state (true for enabled, false
  * for disabled) for compression algorithms.
diff --git a/src/core/lib/channel/channel_stack.cc b/src/core/lib/channel/channel_stack.cc
index 7629d18789..195fe0b195 100644
--- a/src/core/lib/channel/channel_stack.cc
+++ b/src/core/lib/channel/channel_stack.cc
@@ -88,8 +88,8 @@ grpc_call_element* grpc_call_stack_element(grpc_call_stack* call_stack,
 }
 
 grpc_error* grpc_channel_stack_init(
-    grpc_exec_ctx* exec_ctx, int initial_refs, grpc_iomgr_cb_func destroy,
-    void* destroy_arg, const grpc_channel_filter** filters, size_t filter_count,
+    int initial_refs, grpc_iomgr_cb_func destroy, void* destroy_arg,
+    const grpc_channel_filter** filters, size_t filter_count,
     const grpc_channel_args* channel_args, grpc_transport* optional_transport,
     const char* name, grpc_channel_stack* stack) {
   size_t call_size =
@@ -117,8 +117,7 @@ grpc_error* grpc_channel_stack_init(
     args.is_last = i == (filter_count - 1);
     elems[i].filter = filters[i];
     elems[i].channel_data = user_data;
-    grpc_error* error =
-        elems[i].filter->init_channel_elem(exec_ctx, &elems[i], &args);
+    grpc_error* error = elems[i].filter->init_channel_elem(&elems[i], &args);
     if (error != GRPC_ERROR_NONE) {
       if (first_error == GRPC_ERROR_NONE) {
         first_error = error;
@@ -138,20 +137,18 @@ grpc_error* grpc_channel_stack_init(
   return first_error;
 }
 
-void grpc_channel_stack_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_stack* stack) {
+void grpc_channel_stack_destroy(grpc_channel_stack* stack) {
   grpc_channel_element* channel_elems = CHANNEL_ELEMS_FROM_STACK(stack);
   size_t count = stack->count;
   size_t i;
 
   /* destroy per-filter data */
   for (i = 0; i < count; i++) {
-    channel_elems[i].filter->destroy_channel_elem(exec_ctx, &channel_elems[i]);
+    channel_elems[i].filter->destroy_channel_elem(&channel_elems[i]);
   }
 }
 
-grpc_error* grpc_call_stack_init(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_stack* channel_stack,
+grpc_error* grpc_call_stack_init(grpc_channel_stack* channel_stack,
                                  int initial_refs, grpc_iomgr_cb_func destroy,
                                  void* destroy_arg,
                                  const grpc_call_element_args* elem_args) {
@@ -174,8 +171,8 @@ grpc_error* grpc_call_stack_init(grpc_exec_ctx* exec_ctx,
     call_elems[i].filter = channel_elems[i].filter;
     call_elems[i].channel_data = channel_elems[i].channel_data;
     call_elems[i].call_data = user_data;
-    grpc_error* error = call_elems[i].filter->init_call_elem(
-        exec_ctx, &call_elems[i], elem_args);
+    grpc_error* error =
+        call_elems[i].filter->init_call_elem(&call_elems[i], elem_args);
     if (error != GRPC_ERROR_NONE) {
       if (first_error == GRPC_ERROR_NONE) {
         first_error = error;
@@ -189,8 +186,7 @@ grpc_error* grpc_call_stack_init(grpc_exec_ctx* exec_ctx,
   return first_error;
 }
 
-void grpc_call_stack_set_pollset_or_pollset_set(grpc_exec_ctx* exec_ctx,
-                                                grpc_call_stack* call_stack,
+void grpc_call_stack_set_pollset_or_pollset_set(grpc_call_stack* call_stack,
                                                 grpc_polling_entity* pollent) {
   size_t count = call_stack->count;
   grpc_call_element* call_elems;
@@ -203,18 +199,16 @@ void grpc_call_stack_set_pollset_or_pollset_set(grpc_exec_ctx* exec_ctx,
 
   /* init per-filter data */
   for (i = 0; i < count; i++) {
-    call_elems[i].filter->set_pollset_or_pollset_set(exec_ctx, &call_elems[i],
-                                                     pollent);
+    call_elems[i].filter->set_pollset_or_pollset_set(&call_elems[i], pollent);
     user_data +=
         ROUND_UP_TO_ALIGNMENT_SIZE(call_elems[i].filter->sizeof_call_data);
   }
 }
 
 void grpc_call_stack_ignore_set_pollset_or_pollset_set(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_polling_entity* pollent) {}
+    grpc_call_element* elem, grpc_polling_entity* pollent) {}
 
-void grpc_call_stack_destroy(grpc_exec_ctx* exec_ctx, grpc_call_stack* stack,
+void grpc_call_stack_destroy(grpc_call_stack* stack,
                              const grpc_call_final_info* final_info,
                              grpc_closure* then_schedule_closure) {
   grpc_call_element* elems = CALL_ELEMS_FROM_STACK(stack);
@@ -224,29 +218,27 @@ void grpc_call_stack_destroy(grpc_exec_ctx* exec_ctx, grpc_call_stack* stack,
   /* destroy per-filter data */
   for (i = 0; i < count; i++) {
     elems[i].filter->destroy_call_elem(
-        exec_ctx, &elems[i], final_info,
+        &elems[i], final_info,
         i == count - 1 ? then_schedule_closure : nullptr);
   }
 }
 
-void grpc_call_next_op(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+void grpc_call_next_op(grpc_call_element* elem,
                        grpc_transport_stream_op_batch* op) {
   grpc_call_element* next_elem = elem + 1;
   GRPC_CALL_LOG_OP(GPR_INFO, next_elem, op);
-  next_elem->filter->start_transport_stream_op_batch(exec_ctx, next_elem, op);
+  next_elem->filter->start_transport_stream_op_batch(next_elem, op);
 }
 
-void grpc_channel_next_get_info(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_element* elem,
+void grpc_channel_next_get_info(grpc_channel_element* elem,
                                 const grpc_channel_info* channel_info) {
   grpc_channel_element* next_elem = elem + 1;
-  next_elem->filter->get_channel_info(exec_ctx, next_elem, channel_info);
+  next_elem->filter->get_channel_info(next_elem, channel_info);
 }
 
-void grpc_channel_next_op(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
-                          grpc_transport_op* op) {
+void grpc_channel_next_op(grpc_channel_element* elem, grpc_transport_op* op) {
   grpc_channel_element* next_elem = elem + 1;
-  next_elem->filter->start_transport_op(exec_ctx, next_elem, op);
+  next_elem->filter->start_transport_op(next_elem, op);
 }
 
 grpc_channel_stack* grpc_channel_stack_from_top_element(
diff --git a/src/core/lib/channel/channel_stack.h b/src/core/lib/channel/channel_stack.h
index 1b6e5396a5..716866be26 100644
--- a/src/core/lib/channel/channel_stack.h
+++ b/src/core/lib/channel/channel_stack.h
@@ -96,14 +96,12 @@ typedef struct {
 typedef struct {
   /* Called to eg. send/receive data on a call.
      See grpc_call_next_op on how to call the next element in the stack */
-  void (*start_transport_stream_op_batch)(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_element* elem,
+  void (*start_transport_stream_op_batch)(grpc_call_element* elem,
                                           grpc_transport_stream_op_batch* op);
   /* Called to handle channel level operations - e.g. new calls, or transport
      closure.
      See grpc_channel_next_op on how to call the next element in the stack */
-  void (*start_transport_op)(grpc_exec_ctx* exec_ctx,
-                             grpc_channel_element* elem, grpc_transport_op* op);
+  void (*start_transport_op)(grpc_channel_element* elem, grpc_transport_op* op);
 
   /* sizeof(per call data) */
   size_t sizeof_call_data;
@@ -116,11 +114,9 @@ typedef struct {
      transport and is on the server. Most filters want to ignore this
      argument.
      Implementations may assume that elem->call_data is all zeros. */
-  grpc_error* (*init_call_elem)(grpc_exec_ctx* exec_ctx,
-                                grpc_call_element* elem,
+  grpc_error* (*init_call_elem)(grpc_call_element* elem,
                                 const grpc_call_element_args* args);
-  void (*set_pollset_or_pollset_set)(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_element* elem,
+  void (*set_pollset_or_pollset_set)(grpc_call_element* elem,
                                      grpc_polling_entity* pollent);
   /* Destroy per call data.
      The filter does not need to do any chaining.
@@ -128,7 +124,7 @@ typedef struct {
      \a then_schedule_closure that should be passed to GRPC_CLOSURE_SCHED when
      destruction is complete. \a final_info contains data about the completed
      call, mainly for reporting purposes. */
-  void (*destroy_call_elem)(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+  void (*destroy_call_elem)(grpc_call_element* elem,
                             const grpc_call_final_info* final_info,
                             grpc_closure* then_schedule_closure);
 
@@ -141,16 +137,14 @@ typedef struct {
      useful for asserting correct configuration by upper layer code.
      The filter does not need to do any chaining.
      Implementations may assume that elem->call_data is all zeros. */
-  grpc_error* (*init_channel_elem)(grpc_exec_ctx* exec_ctx,
-                                   grpc_channel_element* elem,
+  grpc_error* (*init_channel_elem)(grpc_channel_element* elem,
                                    grpc_channel_element_args* args);
   /* Destroy per channel data.
      The filter does not need to do any chaining */
-  void (*destroy_channel_elem)(grpc_exec_ctx* exec_ctx,
-                               grpc_channel_element* elem);
+  void (*destroy_channel_elem)(grpc_channel_element* elem);
 
   /* Implement grpc_channel_get_info() */
-  void (*get_channel_info)(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+  void (*get_channel_info)(grpc_channel_element* elem,
                            const grpc_channel_info* channel_info);
 
   /* The name of this filter */
@@ -208,68 +202,62 @@ size_t grpc_channel_stack_size(const grpc_channel_filter** filters,
                                size_t filter_count);
 /* Initialize a channel stack given some filters */
 grpc_error* grpc_channel_stack_init(
-    grpc_exec_ctx* exec_ctx, int initial_refs, grpc_iomgr_cb_func destroy,
-    void* destroy_arg, const grpc_channel_filter** filters, size_t filter_count,
+    int initial_refs, grpc_iomgr_cb_func destroy, void* destroy_arg,
+    const grpc_channel_filter** filters, size_t filter_count,
     const grpc_channel_args* args, grpc_transport* optional_transport,
     const char* name, grpc_channel_stack* stack);
 /* Destroy a channel stack */
-void grpc_channel_stack_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_stack* stack);
+void grpc_channel_stack_destroy(grpc_channel_stack* stack);
 
 /* Initialize a call stack given a channel stack. transport_server_data is
    expected to be NULL on a client, or an opaque transport owned pointer on the
    server. */
-grpc_error* grpc_call_stack_init(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_stack* channel_stack,
+grpc_error* grpc_call_stack_init(grpc_channel_stack* channel_stack,
                                  int initial_refs, grpc_iomgr_cb_func destroy,
                                  void* destroy_arg,
                                  const grpc_call_element_args* elem_args);
 /* Set a pollset or a pollset_set for a call stack: must occur before the first
  * op is started */
-void grpc_call_stack_set_pollset_or_pollset_set(grpc_exec_ctx* exec_ctx,
-                                                grpc_call_stack* call_stack,
+void grpc_call_stack_set_pollset_or_pollset_set(grpc_call_stack* call_stack,
                                                 grpc_polling_entity* pollent);
 
 #ifndef NDEBUG
 #define GRPC_CALL_STACK_REF(call_stack, reason) \
   grpc_stream_ref(&(call_stack)->refcount, reason)
-#define GRPC_CALL_STACK_UNREF(exec_ctx, call_stack, reason) \
-  grpc_stream_unref(exec_ctx, &(call_stack)->refcount, reason)
+#define GRPC_CALL_STACK_UNREF(call_stack, reason) \
+  grpc_stream_unref(&(call_stack)->refcount, reason)
 #define GRPC_CHANNEL_STACK_REF(channel_stack, reason) \
   grpc_stream_ref(&(channel_stack)->refcount, reason)
-#define GRPC_CHANNEL_STACK_UNREF(exec_ctx, channel_stack, reason) \
-  grpc_stream_unref(exec_ctx, &(channel_stack)->refcount, reason)
+#define GRPC_CHANNEL_STACK_UNREF(channel_stack, reason) \
+  grpc_stream_unref(&(channel_stack)->refcount, reason)
 #else
 #define GRPC_CALL_STACK_REF(call_stack, reason) \
   grpc_stream_ref(&(call_stack)->refcount)
-#define GRPC_CALL_STACK_UNREF(exec_ctx, call_stack, reason) \
-  grpc_stream_unref(exec_ctx, &(call_stack)->refcount)
+#define GRPC_CALL_STACK_UNREF(call_stack, reason) \
+  grpc_stream_unref(&(call_stack)->refcount)
 #define GRPC_CHANNEL_STACK_REF(channel_stack, reason) \
   grpc_stream_ref(&(channel_stack)->refcount)
-#define GRPC_CHANNEL_STACK_UNREF(exec_ctx, channel_stack, reason) \
-  grpc_stream_unref(exec_ctx, &(channel_stack)->refcount)
+#define GRPC_CHANNEL_STACK_UNREF(channel_stack, reason) \
+  grpc_stream_unref(&(channel_stack)->refcount)
 #endif
 
 /* Destroy a call stack */
-void grpc_call_stack_destroy(grpc_exec_ctx* exec_ctx, grpc_call_stack* stack,
+void grpc_call_stack_destroy(grpc_call_stack* stack,
                              const grpc_call_final_info* final_info,
                              grpc_closure* then_schedule_closure);
 
 /* Ignore set pollset{_set} - used by filters if they don't care about pollsets
  * at all. Does nothing. */
 void grpc_call_stack_ignore_set_pollset_or_pollset_set(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_polling_entity* pollent);
+    grpc_call_element* elem, grpc_polling_entity* pollent);
 /* Call the next operation in a call stack */
-void grpc_call_next_op(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+void grpc_call_next_op(grpc_call_element* elem,
                        grpc_transport_stream_op_batch* op);
 /* Call the next operation (depending on call directionality) in a channel
    stack */
-void grpc_channel_next_op(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
-                          grpc_transport_op* op);
+void grpc_channel_next_op(grpc_channel_element* elem, grpc_transport_op* op);
 /* Pass through a request to get_channel_info() to the next child element */
-void grpc_channel_next_get_info(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_element* elem,
+void grpc_channel_next_get_info(grpc_channel_element* elem,
                                 const grpc_channel_info* channel_info);
 
 /* Given the top element of a channel stack, get the channel stack itself */
diff --git a/src/core/lib/channel/channel_stack_builder.cc b/src/core/lib/channel/channel_stack_builder.cc
index 77b7854f94..fcba826644 100644
--- a/src/core/lib/channel/channel_stack_builder.cc
+++ b/src/core/lib/channel/channel_stack_builder.cc
@@ -150,10 +150,9 @@ void grpc_channel_stack_builder_set_name(grpc_channel_stack_builder* builder,
 }
 
 void grpc_channel_stack_builder_set_channel_arguments(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder,
-    const grpc_channel_args* args) {
+    grpc_channel_stack_builder* builder, const grpc_channel_args* args) {
   if (builder->args != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, builder->args);
+    grpc_channel_args_destroy(builder->args);
   }
   builder->args = grpc_channel_args_copy(args);
 }
@@ -241,8 +240,7 @@ bool grpc_channel_stack_builder_add_filter_after(
   return true;
 }
 
-void grpc_channel_stack_builder_destroy(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_stack_builder* builder) {
+void grpc_channel_stack_builder_destroy(grpc_channel_stack_builder* builder) {
   filter_node* p = builder->begin.next;
   while (p != &builder->end) {
     filter_node* next = p->next;
@@ -250,16 +248,15 @@ void grpc_channel_stack_builder_destroy(grpc_exec_ctx* exec_ctx,
     p = next;
   }
   if (builder->args != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, builder->args);
+    grpc_channel_args_destroy(builder->args);
   }
   gpr_free(builder->target);
   gpr_free(builder);
 }
 
 grpc_error* grpc_channel_stack_builder_finish(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder,
-    size_t prefix_bytes, int initial_refs, grpc_iomgr_cb_func destroy,
-    void* destroy_arg, void** result) {
+    grpc_channel_stack_builder* builder, size_t prefix_bytes, int initial_refs,
+    grpc_iomgr_cb_func destroy, void* destroy_arg, void** result) {
   // count the number of filters
   size_t num_filters = 0;
   for (filter_node* p = builder->begin.next; p != &builder->end; p = p->next) {
@@ -284,12 +281,12 @@ grpc_error* grpc_channel_stack_builder_finish(
       (grpc_channel_stack*)((char*)(*result) + prefix_bytes);
   // and initialize it
   grpc_error* error = grpc_channel_stack_init(
-      exec_ctx, initial_refs, destroy,
-      destroy_arg == nullptr ? *result : destroy_arg, filters, num_filters,
-      builder->args, builder->transport, builder->name, channel_stack);
+      initial_refs, destroy, destroy_arg == nullptr ? *result : destroy_arg,
+      filters, num_filters, builder->args, builder->transport, builder->name,
+      channel_stack);
 
   if (error != GRPC_ERROR_NONE) {
-    grpc_channel_stack_destroy(exec_ctx, channel_stack);
+    grpc_channel_stack_destroy(channel_stack);
     gpr_free(*result);
     *result = nullptr;
   } else {
@@ -305,7 +302,7 @@ grpc_error* grpc_channel_stack_builder_finish(
     }
   }
 
-  grpc_channel_stack_builder_destroy(exec_ctx, builder);
+  grpc_channel_stack_builder_destroy(builder);
   gpr_free((grpc_channel_filter**)filters);
 
   return error;
diff --git a/src/core/lib/channel/channel_stack_builder.h b/src/core/lib/channel/channel_stack_builder.h
index 10019542b1..d00ddc698c 100644
--- a/src/core/lib/channel/channel_stack_builder.h
+++ b/src/core/lib/channel/channel_stack_builder.h
@@ -54,8 +54,7 @@ grpc_transport* grpc_channel_stack_builder_get_transport(
 
 /// Set channel arguments: copies args
 void grpc_channel_stack_builder_set_channel_arguments(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder,
-    const grpc_channel_args* args);
+    grpc_channel_stack_builder* builder, const grpc_channel_args* args);
 
 /// Return a borrowed pointer to the channel arguments
 const grpc_channel_args* grpc_channel_stack_builder_get_channel_arguments(
@@ -148,13 +147,11 @@ void grpc_channel_stack_builder_iterator_destroy(
 /// \a initial_refs, \a destroy, \a destroy_arg are as per
 /// grpc_channel_stack_init
 grpc_error* grpc_channel_stack_builder_finish(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder,
-    size_t prefix_bytes, int initial_refs, grpc_iomgr_cb_func destroy,
-    void* destroy_arg, void** result);
+    grpc_channel_stack_builder* builder, size_t prefix_bytes, int initial_refs,
+    grpc_iomgr_cb_func destroy, void* destroy_arg, void** result);
 
 /// Destroy the builder without creating a channel stack
-void grpc_channel_stack_builder_destroy(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_stack_builder* builder);
+void grpc_channel_stack_builder_destroy(grpc_channel_stack_builder* builder);
 
 extern grpc_core::TraceFlag grpc_trace_channel_stack_builder;
 
diff --git a/src/core/lib/channel/connected_channel.cc b/src/core/lib/channel/connected_channel.cc
index af2f88ab2e..9d07cfff4e 100644
--- a/src/core/lib/channel/connected_channel.cc
+++ b/src/core/lib/channel/connected_channel.cc
@@ -51,17 +51,14 @@ typedef struct connected_channel_call_data {
   callback_state recv_message_ready;
 } call_data;
 
-static void run_in_call_combiner(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void run_in_call_combiner(void* arg, grpc_error* error) {
   callback_state* state = (callback_state*)arg;
-  GRPC_CALL_COMBINER_START(exec_ctx, state->call_combiner,
-                           state->original_closure, GRPC_ERROR_REF(error),
-                           state->reason);
+  GRPC_CALL_COMBINER_START(state->call_combiner, state->original_closure,
+                           GRPC_ERROR_REF(error), state->reason);
 }
 
-static void run_cancel_in_call_combiner(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
-  run_in_call_combiner(exec_ctx, arg, error);
+static void run_cancel_in_call_combiner(void* arg, grpc_error* error) {
+  run_in_call_combiner(arg, error);
   gpr_free(arg);
 }
 
@@ -98,8 +95,7 @@ static callback_state* get_state_for_batch(
 /* Intercept a call operation and either push it directly up or translate it
    into transport stream operations */
 static void con_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   if (batch->recv_initial_metadata) {
@@ -126,58 +122,52 @@ static void con_start_transport_stream_op_batch(
     callback_state* state = get_state_for_batch(calld, batch);
     intercept_callback(calld, state, false, "on_complete", &batch->on_complete);
   }
-  grpc_transport_perform_stream_op(exec_ctx, chand->transport,
-                                   TRANSPORT_STREAM_FROM_CALL_DATA(calld),
-                                   batch);
-  GRPC_CALL_COMBINER_STOP(exec_ctx, calld->call_combiner,
-                          "passed batch to transport");
+  grpc_transport_perform_stream_op(
+      chand->transport, TRANSPORT_STREAM_FROM_CALL_DATA(calld), batch);
+  GRPC_CALL_COMBINER_STOP(calld->call_combiner, "passed batch to transport");
 }
 
-static void con_start_transport_op(grpc_exec_ctx* exec_ctx,
-                                   grpc_channel_element* elem,
+static void con_start_transport_op(grpc_channel_element* elem,
                                    grpc_transport_op* op) {
   channel_data* chand = (channel_data*)elem->channel_data;
-  grpc_transport_perform_op(exec_ctx, chand->transport, op);
+  grpc_transport_perform_op(chand->transport, op);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   calld->call_combiner = args->call_combiner;
   int r = grpc_transport_init_stream(
-      exec_ctx, chand->transport, TRANSPORT_STREAM_FROM_CALL_DATA(calld),
+      chand->transport, TRANSPORT_STREAM_FROM_CALL_DATA(calld),
       &args->call_stack->refcount, args->server_transport_data, args->arena);
   return r == 0 ? GRPC_ERROR_NONE
                 : GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                       "transport stream initialization failed");
 }
 
-static void set_pollset_or_pollset_set(grpc_exec_ctx* exec_ctx,
-                                       grpc_call_element* elem,
+static void set_pollset_or_pollset_set(grpc_call_element* elem,
                                        grpc_polling_entity* pollent) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
-  grpc_transport_set_pops(exec_ctx, chand->transport,
+  grpc_transport_set_pops(chand->transport,
                           TRANSPORT_STREAM_FROM_CALL_DATA(calld), pollent);
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* then_schedule_closure) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
-  grpc_transport_destroy_stream(exec_ctx, chand->transport,
+  grpc_transport_destroy_stream(chand->transport,
                                 TRANSPORT_STREAM_FROM_CALL_DATA(calld),
                                 then_schedule_closure);
 }
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   channel_data* cd = (channel_data*)elem->channel_data;
   GPR_ASSERT(args->is_last);
@@ -186,17 +176,15 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
 }
 
 /* Destructor for channel_data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   channel_data* cd = (channel_data*)elem->channel_data;
   if (cd->transport) {
-    grpc_transport_destroy(exec_ctx, cd->transport);
+    grpc_transport_destroy(cd->transport);
   }
 }
 
 /* No-op. */
-static void con_get_channel_info(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem,
+static void con_get_channel_info(grpc_channel_element* elem,
                                  const grpc_channel_info* channel_info) {}
 
 const grpc_channel_filter grpc_connected_filter = {
@@ -230,8 +218,7 @@ static void bind_transport(grpc_channel_stack* channel_stack,
       grpc_transport_stream_size((grpc_transport*)t);
 }
 
-bool grpc_add_connected_filter(grpc_exec_ctx* exec_ctx,
-                               grpc_channel_stack_builder* builder,
+bool grpc_add_connected_filter(grpc_channel_stack_builder* builder,
                                void* arg_must_be_null) {
   GPR_ASSERT(arg_must_be_null == nullptr);
   grpc_transport* t = grpc_channel_stack_builder_get_transport(builder);
diff --git a/src/core/lib/channel/connected_channel.h b/src/core/lib/channel/connected_channel.h
index cab8aad154..91de8022db 100644
--- a/src/core/lib/channel/connected_channel.h
+++ b/src/core/lib/channel/connected_channel.h
@@ -23,8 +23,7 @@
 
 extern const grpc_channel_filter grpc_connected_filter;
 
-bool grpc_add_connected_filter(grpc_exec_ctx* exec_ctx,
-                               grpc_channel_stack_builder* builder,
+bool grpc_add_connected_filter(grpc_channel_stack_builder* builder,
                                void* arg_must_be_null);
 
 /* Debug helper to dig the transport stream out of a call element */
diff --git a/src/core/lib/channel/handshaker.cc b/src/core/lib/channel/handshaker.cc
index 58c30b165b..dcb149c03e 100644
--- a/src/core/lib/channel/handshaker.cc
+++ b/src/core/lib/channel/handshaker.cc
@@ -34,23 +34,20 @@ void grpc_handshaker_init(const grpc_handshaker_vtable* vtable,
   handshaker->vtable = vtable;
 }
 
-void grpc_handshaker_destroy(grpc_exec_ctx* exec_ctx,
-                             grpc_handshaker* handshaker) {
-  handshaker->vtable->destroy(exec_ctx, handshaker);
+void grpc_handshaker_destroy(grpc_handshaker* handshaker) {
+  handshaker->vtable->destroy(handshaker);
 }
 
-void grpc_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
-                              grpc_handshaker* handshaker, grpc_error* why) {
-  handshaker->vtable->shutdown(exec_ctx, handshaker, why);
+void grpc_handshaker_shutdown(grpc_handshaker* handshaker, grpc_error* why) {
+  handshaker->vtable->shutdown(handshaker, why);
 }
 
-void grpc_handshaker_do_handshake(grpc_exec_ctx* exec_ctx,
-                                  grpc_handshaker* handshaker,
+void grpc_handshaker_do_handshake(grpc_handshaker* handshaker,
                                   grpc_tcp_server_acceptor* acceptor,
                                   grpc_closure* on_handshake_done,
                                   grpc_handshaker_args* args) {
-  handshaker->vtable->do_handshake(exec_ctx, handshaker, acceptor,
-                                   on_handshake_done, args);
+  handshaker->vtable->do_handshake(handshaker, acceptor, on_handshake_done,
+                                   args);
 }
 
 //
@@ -116,9 +113,9 @@ void grpc_handshake_manager_pending_list_remove(grpc_handshake_manager** head,
 }
 
 void grpc_handshake_manager_pending_list_shutdown_all(
-    grpc_exec_ctx* exec_ctx, grpc_handshake_manager* head, grpc_error* why) {
+    grpc_handshake_manager* head, grpc_error* why) {
   while (head != nullptr) {
-    grpc_handshake_manager_shutdown(exec_ctx, head, GRPC_ERROR_REF(why));
+    grpc_handshake_manager_shutdown(head, GRPC_ERROR_REF(why));
     head = head->next;
   }
   GRPC_ERROR_UNREF(why);
@@ -145,11 +142,10 @@ void grpc_handshake_manager_add(grpc_handshake_manager* mgr,
   gpr_mu_unlock(&mgr->mu);
 }
 
-static void grpc_handshake_manager_unref(grpc_exec_ctx* exec_ctx,
-                                         grpc_handshake_manager* mgr) {
+static void grpc_handshake_manager_unref(grpc_handshake_manager* mgr) {
   if (gpr_unref(&mgr->refs)) {
     for (size_t i = 0; i < mgr->count; ++i) {
-      grpc_handshaker_destroy(exec_ctx, mgr->handshakers[i]);
+      grpc_handshaker_destroy(mgr->handshakers[i]);
     }
     gpr_free(mgr->handshakers);
     gpr_mu_destroy(&mgr->mu);
@@ -157,19 +153,17 @@ static void grpc_handshake_manager_unref(grpc_exec_ctx* exec_ctx,
   }
 }
 
-void grpc_handshake_manager_destroy(grpc_exec_ctx* exec_ctx,
-                                    grpc_handshake_manager* mgr) {
-  grpc_handshake_manager_unref(exec_ctx, mgr);
+void grpc_handshake_manager_destroy(grpc_handshake_manager* mgr) {
+  grpc_handshake_manager_unref(mgr);
 }
 
-void grpc_handshake_manager_shutdown(grpc_exec_ctx* exec_ctx,
-                                     grpc_handshake_manager* mgr,
+void grpc_handshake_manager_shutdown(grpc_handshake_manager* mgr,
                                      grpc_error* why) {
   gpr_mu_lock(&mgr->mu);
   // Shutdown the handshaker that's currently in progress, if any.
   if (!mgr->shutdown && mgr->index > 0) {
     mgr->shutdown = true;
-    grpc_handshaker_shutdown(exec_ctx, mgr->handshakers[mgr->index - 1],
+    grpc_handshaker_shutdown(mgr->handshakers[mgr->index - 1],
                              GRPC_ERROR_REF(why));
   }
   gpr_mu_unlock(&mgr->mu);
@@ -179,8 +173,7 @@ void grpc_handshake_manager_shutdown(grpc_exec_ctx* exec_ctx,
 // Helper function to call either the next handshaker or the
 // on_handshake_done callback.
 // Returns true if we've scheduled the on_handshake_done callback.
-static bool call_next_handshaker_locked(grpc_exec_ctx* exec_ctx,
-                                        grpc_handshake_manager* mgr,
+static bool call_next_handshaker_locked(grpc_handshake_manager* mgr,
                                         grpc_error* error) {
   GPR_ASSERT(mgr->index <= mgr->count);
   // If we got an error or we've been shut down or we're exiting early or
@@ -190,13 +183,12 @@ static bool call_next_handshaker_locked(grpc_exec_ctx* exec_ctx,
       mgr->index == mgr->count) {
     // Cancel deadline timer, since we're invoking the on_handshake_done
     // callback now.
-    grpc_timer_cancel(exec_ctx, &mgr->deadline_timer);
-    GRPC_CLOSURE_SCHED(exec_ctx, &mgr->on_handshake_done, error);
+    grpc_timer_cancel(&mgr->deadline_timer);
+    GRPC_CLOSURE_SCHED(&mgr->on_handshake_done, error);
     mgr->shutdown = true;
   } else {
-    grpc_handshaker_do_handshake(exec_ctx, mgr->handshakers[mgr->index],
-                                 mgr->acceptor, &mgr->call_next_handshaker,
-                                 &mgr->args);
+    grpc_handshaker_do_handshake(mgr->handshakers[mgr->index], mgr->acceptor,
+                                 &mgr->call_next_handshaker, &mgr->args);
   }
   ++mgr->index;
   return mgr->shutdown;
@@ -204,37 +196,34 @@ static bool call_next_handshaker_locked(grpc_exec_ctx* exec_ctx,
 
 // A function used as the handshaker-done callback when chaining
 // handshakers together.
-static void call_next_handshaker(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void call_next_handshaker(void* arg, grpc_error* error) {
   grpc_handshake_manager* mgr = (grpc_handshake_manager*)arg;
   gpr_mu_lock(&mgr->mu);
-  bool done = call_next_handshaker_locked(exec_ctx, mgr, GRPC_ERROR_REF(error));
+  bool done = call_next_handshaker_locked(mgr, GRPC_ERROR_REF(error));
   gpr_mu_unlock(&mgr->mu);
   // If we're invoked the final callback, we won't be coming back
   // to this function, so we can release our reference to the
   // handshake manager.
   if (done) {
-    grpc_handshake_manager_unref(exec_ctx, mgr);
+    grpc_handshake_manager_unref(mgr);
   }
 }
 
 // Callback invoked when deadline is exceeded.
-static void on_timeout(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_timeout(void* arg, grpc_error* error) {
   grpc_handshake_manager* mgr = (grpc_handshake_manager*)arg;
   if (error == GRPC_ERROR_NONE) {  // Timer fired, rather than being cancelled.
     grpc_handshake_manager_shutdown(
-        exec_ctx, mgr,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Handshake timed out"));
+        mgr, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Handshake timed out"));
   }
-  grpc_handshake_manager_unref(exec_ctx, mgr);
+  grpc_handshake_manager_unref(mgr);
 }
 
 void grpc_handshake_manager_do_handshake(
-    grpc_exec_ctx* exec_ctx, grpc_handshake_manager* mgr,
-    grpc_pollset_set* interested_parties, grpc_endpoint* endpoint,
-    const grpc_channel_args* channel_args, grpc_millis deadline,
-    grpc_tcp_server_acceptor* acceptor, grpc_iomgr_cb_func on_handshake_done,
-    void* user_data) {
+    grpc_handshake_manager* mgr, grpc_pollset_set* interested_parties,
+    grpc_endpoint* endpoint, const grpc_channel_args* channel_args,
+    grpc_millis deadline, grpc_tcp_server_acceptor* acceptor,
+    grpc_iomgr_cb_func on_handshake_done, void* user_data) {
   gpr_mu_lock(&mgr->mu);
   GPR_ASSERT(mgr->index == 0);
   GPR_ASSERT(!mgr->shutdown);
@@ -257,12 +246,12 @@ void grpc_handshake_manager_do_handshake(
   gpr_ref(&mgr->refs);
   GRPC_CLOSURE_INIT(&mgr->on_timeout, on_timeout, mgr,
                     grpc_schedule_on_exec_ctx);
-  grpc_timer_init(exec_ctx, &mgr->deadline_timer, deadline, &mgr->on_timeout);
+  grpc_timer_init(&mgr->deadline_timer, deadline, &mgr->on_timeout);
   // Start first handshaker, which also owns a ref.
   gpr_ref(&mgr->refs);
-  bool done = call_next_handshaker_locked(exec_ctx, mgr, GRPC_ERROR_NONE);
+  bool done = call_next_handshaker_locked(mgr, GRPC_ERROR_NONE);
   gpr_mu_unlock(&mgr->mu);
   if (done) {
-    grpc_handshake_manager_unref(exec_ctx, mgr);
+    grpc_handshake_manager_unref(mgr);
   }
 }
diff --git a/src/core/lib/channel/handshaker.h b/src/core/lib/channel/handshaker.h
index 8e4114dc64..68e5463123 100644
--- a/src/core/lib/channel/handshaker.h
+++ b/src/core/lib/channel/handshaker.h
@@ -68,18 +68,17 @@ typedef struct {
 
 typedef struct {
   /// Destroys the handshaker.
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker);
+  void (*destroy)(grpc_handshaker* handshaker);
 
   /// Shuts down the handshaker (e.g., to clean up when the operation is
   /// aborted in the middle).
-  void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker,
-                   grpc_error* why);
+  void (*shutdown)(grpc_handshaker* handshaker, grpc_error* why);
 
   /// Performs handshaking, modifying \a args as needed (e.g., to
   /// replace \a endpoint with a wrapped endpoint).
   /// When finished, invokes \a on_handshake_done.
   /// \a acceptor will be NULL for client-side handshakers.
-  void (*do_handshake)(grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker,
+  void (*do_handshake)(grpc_handshaker* handshaker,
                        grpc_tcp_server_acceptor* acceptor,
                        grpc_closure* on_handshake_done,
                        grpc_handshaker_args* args);
@@ -95,12 +94,9 @@ struct grpc_handshaker {
 void grpc_handshaker_init(const grpc_handshaker_vtable* vtable,
                           grpc_handshaker* handshaker);
 
-void grpc_handshaker_destroy(grpc_exec_ctx* exec_ctx,
-                             grpc_handshaker* handshaker);
-void grpc_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
-                              grpc_handshaker* handshaker, grpc_error* why);
-void grpc_handshaker_do_handshake(grpc_exec_ctx* exec_ctx,
-                                  grpc_handshaker* handshaker,
+void grpc_handshaker_destroy(grpc_handshaker* handshaker);
+void grpc_handshaker_shutdown(grpc_handshaker* handshaker, grpc_error* why);
+void grpc_handshaker_do_handshake(grpc_handshaker* handshaker,
                                   grpc_tcp_server_acceptor* acceptor,
                                   grpc_closure* on_handshake_done,
                                   grpc_handshaker_args* args);
@@ -120,15 +116,13 @@ void grpc_handshake_manager_add(grpc_handshake_manager* mgr,
                                 grpc_handshaker* handshaker);
 
 /// Destroys the handshake manager.
-void grpc_handshake_manager_destroy(grpc_exec_ctx* exec_ctx,
-                                    grpc_handshake_manager* mgr);
+void grpc_handshake_manager_destroy(grpc_handshake_manager* mgr);
 
 /// Shuts down the handshake manager (e.g., to clean up when the operation is
 /// aborted in the middle).
 /// The caller must still call grpc_handshake_manager_destroy() after
 /// calling this function.
-void grpc_handshake_manager_shutdown(grpc_exec_ctx* exec_ctx,
-                                     grpc_handshake_manager* mgr,
+void grpc_handshake_manager_shutdown(grpc_handshake_manager* mgr,
                                      grpc_error* why);
 
 /// Invokes handshakers in the order they were added.
@@ -146,11 +140,10 @@ void grpc_handshake_manager_shutdown(grpc_exec_ctx* exec_ctx,
 /// the necessary clean-up.  Otherwise, the callback takes ownership of
 /// the arguments.
 void grpc_handshake_manager_do_handshake(
-    grpc_exec_ctx* exec_ctx, grpc_handshake_manager* mgr,
-    grpc_pollset_set* interested_parties, grpc_endpoint* endpoint,
-    const grpc_channel_args* channel_args, grpc_millis deadline,
-    grpc_tcp_server_acceptor* acceptor, grpc_iomgr_cb_func on_handshake_done,
-    void* user_data);
+    grpc_handshake_manager* mgr, grpc_pollset_set* interested_parties,
+    grpc_endpoint* endpoint, const grpc_channel_args* channel_args,
+    grpc_millis deadline, grpc_tcp_server_acceptor* acceptor,
+    grpc_iomgr_cb_func on_handshake_done, void* user_data);
 
 /// Add \a mgr to the server side list of all pending handshake managers, the
 /// list starts with \a *head.
@@ -166,6 +159,6 @@ void grpc_handshake_manager_pending_list_remove(grpc_handshake_manager** head,
 /// Shutdown all pending handshake managers on the server side.
 // Not thread-safe. Caller needs to synchronize.
 void grpc_handshake_manager_pending_list_shutdown_all(
-    grpc_exec_ctx* exec_ctx, grpc_handshake_manager* head, grpc_error* why);
+    grpc_handshake_manager* head, grpc_error* why);
 
 #endif /* GRPC_CORE_LIB_CHANNEL_HANDSHAKER_H */
diff --git a/src/core/lib/channel/handshaker_factory.cc b/src/core/lib/channel/handshaker_factory.cc
index 015006ade0..2380d98300 100644
--- a/src/core/lib/channel/handshaker_factory.cc
+++ b/src/core/lib/channel/handshaker_factory.cc
@@ -21,19 +21,19 @@
 #include <grpc/support/log.h>
 
 void grpc_handshaker_factory_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr) {
+    grpc_handshaker_factory* handshaker_factory, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr) {
   if (handshaker_factory != nullptr) {
     GPR_ASSERT(handshaker_factory->vtable != nullptr);
-    handshaker_factory->vtable->add_handshakers(exec_ctx, handshaker_factory,
-                                                args, handshake_mgr);
+    handshaker_factory->vtable->add_handshakers(handshaker_factory, args,
+                                                handshake_mgr);
   }
 }
 
 void grpc_handshaker_factory_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory) {
+    grpc_handshaker_factory* handshaker_factory) {
   if (handshaker_factory != nullptr) {
     GPR_ASSERT(handshaker_factory->vtable != nullptr);
-    handshaker_factory->vtable->destroy(exec_ctx, handshaker_factory);
+    handshaker_factory->vtable->destroy(handshaker_factory);
   }
 }
diff --git a/src/core/lib/channel/handshaker_factory.h b/src/core/lib/channel/handshaker_factory.h
index ca7c26b50a..8a7c0157e8 100644
--- a/src/core/lib/channel/handshaker_factory.h
+++ b/src/core/lib/channel/handshaker_factory.h
@@ -29,12 +29,10 @@
 typedef struct grpc_handshaker_factory grpc_handshaker_factory;
 
 typedef struct {
-  void (*add_handshakers)(grpc_exec_ctx* exec_ctx,
-                          grpc_handshaker_factory* handshaker_factory,
+  void (*add_handshakers)(grpc_handshaker_factory* handshaker_factory,
                           const grpc_channel_args* args,
                           grpc_handshake_manager* handshake_mgr);
-  void (*destroy)(grpc_exec_ctx* exec_ctx,
-                  grpc_handshaker_factory* handshaker_factory);
+  void (*destroy)(grpc_handshaker_factory* handshaker_factory);
 } grpc_handshaker_factory_vtable;
 
 struct grpc_handshaker_factory {
@@ -42,10 +40,10 @@ struct grpc_handshaker_factory {
 };
 
 void grpc_handshaker_factory_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr);
+    grpc_handshaker_factory* handshaker_factory, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr);
 
 void grpc_handshaker_factory_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory);
+    grpc_handshaker_factory* handshaker_factory);
 
 #endif /* GRPC_CORE_LIB_CHANNEL_HANDSHAKER_FACTORY_H */
diff --git a/src/core/lib/channel/handshaker_registry.cc b/src/core/lib/channel/handshaker_registry.cc
index c6bc87d704..098eabf084 100644
--- a/src/core/lib/channel/handshaker_registry.cc
+++ b/src/core/lib/channel/handshaker_registry.cc
@@ -47,18 +47,17 @@ static void grpc_handshaker_factory_list_register(
 }
 
 static void grpc_handshaker_factory_list_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory_list* list,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr) {
+    grpc_handshaker_factory_list* list, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr) {
   for (size_t i = 0; i < list->num_factories; ++i) {
-    grpc_handshaker_factory_add_handshakers(exec_ctx, list->list[i], args,
-                                            handshake_mgr);
+    grpc_handshaker_factory_add_handshakers(list->list[i], args, handshake_mgr);
   }
 }
 
 static void grpc_handshaker_factory_list_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory_list* list) {
+    grpc_handshaker_factory_list* list) {
   for (size_t i = 0; i < list->num_factories; ++i) {
-    grpc_handshaker_factory_destroy(exec_ctx, list->list[i]);
+    grpc_handshaker_factory_destroy(list->list[i]);
   }
   gpr_free(list->list);
 }
@@ -74,10 +73,9 @@ void grpc_handshaker_factory_registry_init() {
   memset(g_handshaker_factory_lists, 0, sizeof(g_handshaker_factory_lists));
 }
 
-void grpc_handshaker_factory_registry_shutdown(grpc_exec_ctx* exec_ctx) {
+void grpc_handshaker_factory_registry_shutdown() {
   for (size_t i = 0; i < NUM_HANDSHAKER_TYPES; ++i) {
-    grpc_handshaker_factory_list_destroy(exec_ctx,
-                                         &g_handshaker_factory_lists[i]);
+    grpc_handshaker_factory_list_destroy(&g_handshaker_factory_lists[i]);
   }
 }
 
@@ -88,11 +86,9 @@ void grpc_handshaker_factory_register(bool at_start,
       &g_handshaker_factory_lists[handshaker_type], at_start, factory);
 }
 
-void grpc_handshakers_add(grpc_exec_ctx* exec_ctx,
-                          grpc_handshaker_type handshaker_type,
+void grpc_handshakers_add(grpc_handshaker_type handshaker_type,
                           const grpc_channel_args* args,
                           grpc_handshake_manager* handshake_mgr) {
   grpc_handshaker_factory_list_add_handshakers(
-      exec_ctx, &g_handshaker_factory_lists[handshaker_type], args,
-      handshake_mgr);
+      &g_handshaker_factory_lists[handshaker_type], args, handshake_mgr);
 }
diff --git a/src/core/lib/channel/handshaker_registry.h b/src/core/lib/channel/handshaker_registry.h
index a3b2ac1dc7..0b05531b7e 100644
--- a/src/core/lib/channel/handshaker_registry.h
+++ b/src/core/lib/channel/handshaker_registry.h
@@ -31,7 +31,7 @@ typedef enum {
 } grpc_handshaker_type;
 
 void grpc_handshaker_factory_registry_init();
-void grpc_handshaker_factory_registry_shutdown(grpc_exec_ctx* exec_ctx);
+void grpc_handshaker_factory_registry_shutdown();
 
 /// Registers a new handshaker factory.  Takes ownership.
 /// If \a at_start is true, the new handshaker will be at the beginning of
@@ -40,8 +40,7 @@ void grpc_handshaker_factory_register(bool at_start,
                                       grpc_handshaker_type handshaker_type,
                                       grpc_handshaker_factory* factory);
 
-void grpc_handshakers_add(grpc_exec_ctx* exec_ctx,
-                          grpc_handshaker_type handshaker_type,
+void grpc_handshakers_add(grpc_handshaker_type handshaker_type,
                           const grpc_channel_args* args,
                           grpc_handshake_manager* handshake_mgr);
 
diff --git a/src/core/lib/compression/message_compress.cc b/src/core/lib/compression/message_compress.cc
index c051e28864..aa43a53f2b 100644
--- a/src/core/lib/compression/message_compress.cc
+++ b/src/core/lib/compression/message_compress.cc
@@ -29,8 +29,8 @@
 
 #define OUTPUT_BLOCK_SIZE 1024
 
-static int zlib_body(grpc_exec_ctx* exec_ctx, z_stream* zs,
-                     grpc_slice_buffer* input, grpc_slice_buffer* output,
+static int zlib_body(z_stream* zs, grpc_slice_buffer* input,
+                     grpc_slice_buffer* output,
                      int (*flate)(z_stream* zs, int flush)) {
   int r;
   int flush;
@@ -74,7 +74,7 @@ static int zlib_body(grpc_exec_ctx* exec_ctx, z_stream* zs,
   return 1;
 
 error:
-  grpc_slice_unref_internal(exec_ctx, outbuf);
+  grpc_slice_unref_internal(outbuf);
   return 0;
 }
 
@@ -84,8 +84,8 @@ static void* zalloc_gpr(void* opaque, unsigned int items, unsigned int size) {
 
 static void zfree_gpr(void* opaque, void* address) { gpr_free(address); }
 
-static int zlib_compress(grpc_exec_ctx* exec_ctx, grpc_slice_buffer* input,
-                         grpc_slice_buffer* output, int gzip) {
+static int zlib_compress(grpc_slice_buffer* input, grpc_slice_buffer* output,
+                         int gzip) {
   z_stream zs;
   int r;
   size_t i;
@@ -97,11 +97,10 @@ static int zlib_compress(grpc_exec_ctx* exec_ctx, grpc_slice_buffer* input,
   r = deflateInit2(&zs, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 15 | (gzip ? 16 : 0),
                    8, Z_DEFAULT_STRATEGY);
   GPR_ASSERT(r == Z_OK);
-  r = zlib_body(exec_ctx, &zs, input, output, deflate) &&
-      output->length < input->length;
+  r = zlib_body(&zs, input, output, deflate) && output->length < input->length;
   if (!r) {
     for (i = count_before; i < output->count; i++) {
-      grpc_slice_unref_internal(exec_ctx, output->slices[i]);
+      grpc_slice_unref_internal(output->slices[i]);
     }
     output->count = count_before;
     output->length = length_before;
@@ -110,8 +109,8 @@ static int zlib_compress(grpc_exec_ctx* exec_ctx, grpc_slice_buffer* input,
   return r;
 }
 
-static int zlib_decompress(grpc_exec_ctx* exec_ctx, grpc_slice_buffer* input,
-                           grpc_slice_buffer* output, int gzip) {
+static int zlib_decompress(grpc_slice_buffer* input, grpc_slice_buffer* output,
+                           int gzip) {
   z_stream zs;
   int r;
   size_t i;
@@ -122,10 +121,10 @@ static int zlib_decompress(grpc_exec_ctx* exec_ctx, grpc_slice_buffer* input,
   zs.zfree = zfree_gpr;
   r = inflateInit2(&zs, 15 | (gzip ? 16 : 0));
   GPR_ASSERT(r == Z_OK);
-  r = zlib_body(exec_ctx, &zs, input, output, inflate);
+  r = zlib_body(&zs, input, output, inflate);
   if (!r) {
     for (i = count_before; i < output->count; i++) {
-      grpc_slice_unref_internal(exec_ctx, output->slices[i]);
+      grpc_slice_unref_internal(output->slices[i]);
     }
     output->count = count_before;
     output->length = length_before;
@@ -142,8 +141,7 @@ static int copy(grpc_slice_buffer* input, grpc_slice_buffer* output) {
   return 1;
 }
 
-static int compress_inner(grpc_exec_ctx* exec_ctx,
-                          grpc_compression_algorithm algorithm,
+static int compress_inner(grpc_compression_algorithm algorithm,
                           grpc_slice_buffer* input, grpc_slice_buffer* output) {
   switch (algorithm) {
     case GRPC_COMPRESS_NONE:
@@ -151,9 +149,9 @@ static int compress_inner(grpc_exec_ctx* exec_ctx,
          rely on that here */
       return 0;
     case GRPC_COMPRESS_DEFLATE:
-      return zlib_compress(exec_ctx, input, output, 0);
+      return zlib_compress(input, output, 0);
     case GRPC_COMPRESS_GZIP:
-      return zlib_compress(exec_ctx, input, output, 1);
+      return zlib_compress(input, output, 1);
     case GRPC_COMPRESS_ALGORITHMS_COUNT:
       break;
   }
@@ -161,26 +159,24 @@ static int compress_inner(grpc_exec_ctx* exec_ctx,
   return 0;
 }
 
-int grpc_msg_compress(grpc_exec_ctx* exec_ctx,
-                      grpc_compression_algorithm algorithm,
+int grpc_msg_compress(grpc_compression_algorithm algorithm,
                       grpc_slice_buffer* input, grpc_slice_buffer* output) {
-  if (!compress_inner(exec_ctx, algorithm, input, output)) {
+  if (!compress_inner(algorithm, input, output)) {
     copy(input, output);
     return 0;
   }
   return 1;
 }
 
-int grpc_msg_decompress(grpc_exec_ctx* exec_ctx,
-                        grpc_compression_algorithm algorithm,
+int grpc_msg_decompress(grpc_compression_algorithm algorithm,
                         grpc_slice_buffer* input, grpc_slice_buffer* output) {
   switch (algorithm) {
     case GRPC_COMPRESS_NONE:
       return copy(input, output);
     case GRPC_COMPRESS_DEFLATE:
-      return zlib_decompress(exec_ctx, input, output, 0);
+      return zlib_decompress(input, output, 0);
     case GRPC_COMPRESS_GZIP:
-      return zlib_decompress(exec_ctx, input, output, 1);
+      return zlib_decompress(input, output, 1);
     case GRPC_COMPRESS_ALGORITHMS_COUNT:
       break;
   }
diff --git a/src/core/lib/compression/message_compress.h b/src/core/lib/compression/message_compress.h
index ca8ca37f8e..c963fccc73 100644
--- a/src/core/lib/compression/message_compress.h
+++ b/src/core/lib/compression/message_compress.h
@@ -25,15 +25,13 @@
 /* compress 'input' to 'output' using 'algorithm'.
    On success, appends compressed slices to output and returns 1.
    On failure, appends uncompressed slices to output and returns 0. */
-int grpc_msg_compress(grpc_exec_ctx* exec_ctx,
-                      grpc_compression_algorithm algorithm,
+int grpc_msg_compress(grpc_compression_algorithm algorithm,
                       grpc_slice_buffer* input, grpc_slice_buffer* output);
 
 /* decompress 'input' to 'output' using 'algorithm'.
    On success, appends slices to output and returns 1.
    On failure, output is unchanged, and returns 0. */
-int grpc_msg_decompress(grpc_exec_ctx* exec_ctx,
-                        grpc_compression_algorithm algorithm,
+int grpc_msg_decompress(grpc_compression_algorithm algorithm,
                         grpc_slice_buffer* input, grpc_slice_buffer* output);
 
 #endif /* GRPC_CORE_LIB_COMPRESSION_MESSAGE_COMPRESS_H */
diff --git a/src/core/lib/compression/stream_compression_gzip.cc b/src/core/lib/compression/stream_compression_gzip.cc
index 0c3fdd1269..9d829b31db 100644
--- a/src/core/lib/compression/stream_compression_gzip.cc
+++ b/src/core/lib/compression/stream_compression_gzip.cc
@@ -40,7 +40,7 @@ static bool gzip_flate(grpc_stream_compression_context_gzip* ctx,
   /* Full flush is not allowed when inflating. */
   GPR_ASSERT(!(ctx->flate == inflate && (flush == Z_FINISH)));
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   int r;
   bool eoc = false;
   size_t original_max_output_size = max_output_size;
@@ -57,8 +57,8 @@ static bool gzip_flate(grpc_stream_compression_context_gzip* ctx,
       r = ctx->flate(&ctx->zs, Z_NO_FLUSH);
       if (r < 0 && r != Z_BUF_ERROR) {
         gpr_log(GPR_ERROR, "zlib error (%d)", r);
-        grpc_slice_unref_internal(&exec_ctx, slice_out);
-        grpc_exec_ctx_finish(&exec_ctx);
+        grpc_slice_unref_internal(slice_out);
+
         return false;
       } else if (r == Z_STREAM_END && ctx->flate == inflate) {
         eoc = true;
@@ -69,7 +69,7 @@ static bool gzip_flate(grpc_stream_compression_context_gzip* ctx,
             grpc_slice_sub(slice, GRPC_SLICE_LENGTH(slice) - ctx->zs.avail_in,
                            GRPC_SLICE_LENGTH(slice)));
       }
-      grpc_slice_unref_internal(&exec_ctx, slice);
+      grpc_slice_unref_internal(slice);
     }
     if (flush != 0 && ctx->zs.avail_out > 0 && !eoc) {
       GPR_ASSERT(in->length == 0);
@@ -88,8 +88,8 @@ static bool gzip_flate(grpc_stream_compression_context_gzip* ctx,
             break;
           default:
             gpr_log(GPR_ERROR, "zlib error (%d)", r);
-            grpc_slice_unref_internal(&exec_ctx, slice_out);
-            grpc_exec_ctx_finish(&exec_ctx);
+            grpc_slice_unref_internal(slice_out);
+
             return false;
         }
       } else if (flush == Z_FINISH) {
@@ -104,8 +104,8 @@ static bool gzip_flate(grpc_stream_compression_context_gzip* ctx,
             break;
           default:
             gpr_log(GPR_ERROR, "zlib error (%d)", r);
-            grpc_slice_unref_internal(&exec_ctx, slice_out);
-            grpc_exec_ctx_finish(&exec_ctx);
+            grpc_slice_unref_internal(slice_out);
+
             return false;
         }
       }
@@ -117,11 +117,11 @@ static bool gzip_flate(grpc_stream_compression_context_gzip* ctx,
       slice_out.data.refcounted.length -= ctx->zs.avail_out;
       grpc_slice_buffer_add(out, slice_out);
     } else {
-      grpc_slice_unref_internal(&exec_ctx, slice_out);
+      grpc_slice_unref_internal(slice_out);
     }
     max_output_size -= (slice_size - ctx->zs.avail_out);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   if (end_of_context) {
     *end_of_context = eoc;
   }
diff --git a/src/core/lib/debug/stats.cc b/src/core/lib/debug/stats.cc
index 7d2af71c47..0b39b2b1e7 100644
--- a/src/core/lib/debug/stats.cc
+++ b/src/core/lib/debug/stats.cc
@@ -62,9 +62,9 @@ void grpc_stats_diff(const grpc_stats_data* b, const grpc_stats_data* a,
   }
 }
 
-int grpc_stats_histo_find_bucket_slow(grpc_exec_ctx* exec_ctx, int value,
-                                      const int* table, int table_size) {
-  GRPC_STATS_INC_HISTOGRAM_SLOW_LOOKUPS(exec_ctx);
+int grpc_stats_histo_find_bucket_slow(int value, const int* table,
+                                      int table_size) {
+  GRPC_STATS_INC_HISTOGRAM_SLOW_LOOKUPS();
   const int* const start = table;
   while (table_size > 0) {
     int step = table_size / 2;
diff --git a/src/core/lib/debug/stats.h b/src/core/lib/debug/stats.h
index 55db44e0c2..02eed5e844 100644
--- a/src/core/lib/debug/stats.h
+++ b/src/core/lib/debug/stats.h
@@ -30,17 +30,15 @@ typedef struct grpc_stats_data {
 
 extern grpc_stats_data* grpc_stats_per_cpu_storage;
 
-#define GRPC_THREAD_STATS_DATA(exec_ctx) \
-  (&grpc_stats_per_cpu_storage[(exec_ctx)->starting_cpu])
+#define GRPC_THREAD_STATS_DATA() \
+  (&grpc_stats_per_cpu_storage[grpc_core::ExecCtx::Get()->starting_cpu()])
 
-#define GRPC_STATS_INC_COUNTER(exec_ctx, ctr) \
-  (gpr_atm_no_barrier_fetch_add(              \
-      &GRPC_THREAD_STATS_DATA((exec_ctx))->counters[(ctr)], 1))
+#define GRPC_STATS_INC_COUNTER(ctr) \
+  (gpr_atm_no_barrier_fetch_add(&GRPC_THREAD_STATS_DATA()->counters[(ctr)], 1))
 
-#define GRPC_STATS_INC_HISTOGRAM(exec_ctx, histogram, index) \
-  (gpr_atm_no_barrier_fetch_add(                             \
-      &GRPC_THREAD_STATS_DATA((exec_ctx))                    \
-           ->histograms[histogram##_FIRST_SLOT + (index)],   \
+#define GRPC_STATS_INC_HISTOGRAM(histogram, index)                             \
+  (gpr_atm_no_barrier_fetch_add(                                               \
+      &GRPC_THREAD_STATS_DATA()->histograms[histogram##_FIRST_SLOT + (index)], \
       1))
 
 void grpc_stats_init(void);
@@ -50,8 +48,8 @@ void grpc_stats_collect(grpc_stats_data* output);
 void grpc_stats_diff(const grpc_stats_data* b, const grpc_stats_data* a,
                      grpc_stats_data* c);
 char* grpc_stats_data_as_json(const grpc_stats_data* data);
-int grpc_stats_histo_find_bucket_slow(grpc_exec_ctx* exec_ctx, int value,
-                                      const int* table, int table_size);
+int grpc_stats_histo_find_bucket_slow(int value, const int* table,
+                                      int table_size);
 double grpc_stats_histo_percentile(const grpc_stats_data* data,
                                    grpc_stats_histograms histogram,
                                    double percentile);
diff --git a/src/core/lib/debug/stats_data.cc b/src/core/lib/debug/stats_data.cc
index 17e15f4cfb..996ed3de9a 100644
--- a/src/core/lib/debug/stats_data.cc
+++ b/src/core/lib/debug/stats_data.cc
@@ -342,11 +342,10 @@ const uint8_t grpc_stats_table_7[102] = {
     42, 42, 43, 44, 44, 45, 46, 46, 47, 48, 48, 49, 49, 50, 50, 51, 51};
 const int grpc_stats_table_8[9] = {0, 1, 2, 4, 7, 13, 23, 39, 64};
 const uint8_t grpc_stats_table_9[9] = {0, 0, 1, 2, 2, 3, 4, 4, 5};
-void grpc_stats_inc_call_initial_size(grpc_exec_ctx* exec_ctx, int value) {
+void grpc_stats_inc_call_initial_size(int value) {
   value = GPR_CLAMP(value, 0, 262144);
   if (value < 6) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE,
-                             value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE, value);
     return;
   }
   union {
@@ -359,19 +358,17 @@ void grpc_stats_inc_call_initial_size(grpc_exec_ctx* exec_ctx, int value) {
         grpc_stats_table_1[((_val.uint - 4618441417868443648ull) >> 49)] + 6;
     _bkt.dbl = grpc_stats_table_0[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE,
-                             bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE, bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_0, 64));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_0, 64));
 }
-void grpc_stats_inc_poll_events_returned(grpc_exec_ctx* exec_ctx, int value) {
+void grpc_stats_inc_poll_events_returned(int value) {
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 29) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                             GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED, value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED, value);
     return;
   }
   union {
@@ -384,20 +381,17 @@ void grpc_stats_inc_poll_events_returned(grpc_exec_ctx* exec_ctx, int value) {
         grpc_stats_table_3[((_val.uint - 4628855992006737920ull) >> 47)] + 29;
     _bkt.dbl = grpc_stats_table_2[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                             GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED, bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED, bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                           GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_2, 128));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_2, 128));
 }
-void grpc_stats_inc_tcp_write_size(grpc_exec_ctx* exec_ctx, int value) {
+void grpc_stats_inc_tcp_write_size(int value) {
   value = GPR_CLAMP(value, 0, 16777216);
   if (value < 5) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE,
-                             value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE, value);
     return;
   }
   union {
@@ -410,19 +404,17 @@ void grpc_stats_inc_tcp_write_size(grpc_exec_ctx* exec_ctx, int value) {
         grpc_stats_table_5[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
     _bkt.dbl = grpc_stats_table_4[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE,
-                             bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE, bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_4, 64));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_4, 64));
 }
-void grpc_stats_inc_tcp_write_iov_size(grpc_exec_ctx* exec_ctx, int value) {
+void grpc_stats_inc_tcp_write_iov_size(int value) {
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 13) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                             GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE, value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE, value);
     return;
   }
   union {
@@ -435,19 +427,17 @@ void grpc_stats_inc_tcp_write_iov_size(grpc_exec_ctx* exec_ctx, int value) {
         grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
     _bkt.dbl = grpc_stats_table_6[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                             GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE, bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE, bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_6, 64));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_6, 64));
 }
-void grpc_stats_inc_tcp_read_size(grpc_exec_ctx* exec_ctx, int value) {
+void grpc_stats_inc_tcp_read_size(int value) {
   value = GPR_CLAMP(value, 0, 16777216);
   if (value < 5) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_SIZE,
-                             value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_READ_SIZE, value);
     return;
   }
   union {
@@ -460,19 +450,17 @@ void grpc_stats_inc_tcp_read_size(grpc_exec_ctx* exec_ctx, int value) {
         grpc_stats_table_5[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
     _bkt.dbl = grpc_stats_table_4[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_SIZE,
-                             bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_READ_SIZE, bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_SIZE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_4, 64));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_TCP_READ_SIZE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_4, 64));
 }
-void grpc_stats_inc_tcp_read_offer(grpc_exec_ctx* exec_ctx, int value) {
+void grpc_stats_inc_tcp_read_offer(int value) {
   value = GPR_CLAMP(value, 0, 16777216);
   if (value < 5) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_OFFER,
-                             value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_READ_OFFER, value);
     return;
   }
   union {
@@ -485,20 +473,18 @@ void grpc_stats_inc_tcp_read_offer(grpc_exec_ctx* exec_ctx, int value) {
         grpc_stats_table_5[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
     _bkt.dbl = grpc_stats_table_4[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_OFFER,
-                             bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_READ_OFFER, bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_OFFER,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_4, 64));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_TCP_READ_OFFER,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_4, 64));
 }
-void grpc_stats_inc_tcp_read_offer_iov_size(grpc_exec_ctx* exec_ctx,
-                                            int value) {
+void grpc_stats_inc_tcp_read_offer_iov_size(int value) {
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 13) {
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE, value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE,
+                             value);
     return;
   }
   union {
@@ -511,21 +497,19 @@ void grpc_stats_inc_tcp_read_offer_iov_size(grpc_exec_ctx* exec_ctx,
         grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
     _bkt.dbl = grpc_stats_table_6[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE, bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE,
+                             bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                           GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_6, 64));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_6, 64));
 }
-void grpc_stats_inc_http2_send_message_size(grpc_exec_ctx* exec_ctx,
-                                            int value) {
+void grpc_stats_inc_http2_send_message_size(int value) {
   value = GPR_CLAMP(value, 0, 16777216);
   if (value < 5) {
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE, value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE,
+                             value);
     return;
   }
   union {
@@ -538,22 +522,19 @@ void grpc_stats_inc_http2_send_message_size(grpc_exec_ctx* exec_ctx,
         grpc_stats_table_5[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
     _bkt.dbl = grpc_stats_table_4[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE, bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE,
+                             bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                           GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_4, 64));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_4, 64));
 }
-void grpc_stats_inc_http2_send_initial_metadata_per_write(
-    grpc_exec_ctx* exec_ctx, int value) {
+void grpc_stats_inc_http2_send_initial_metadata_per_write(int value) {
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 13) {
     GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE,
-        value);
+        GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE, value);
     return;
   }
   union {
@@ -567,21 +548,18 @@ void grpc_stats_inc_http2_send_initial_metadata_per_write(
     _bkt.dbl = grpc_stats_table_6[bucket];
     bucket -= (_val.uint < _bkt.uint);
     GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE,
-        bucket);
+        GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE, bucket);
     return;
   }
   GRPC_STATS_INC_HISTOGRAM(
-      (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE,
-      grpc_stats_histo_find_bucket_slow((exec_ctx), value, grpc_stats_table_6,
-                                        64));
+      GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_6, 64));
 }
-void grpc_stats_inc_http2_send_message_per_write(grpc_exec_ctx* exec_ctx,
-                                                 int value) {
+void grpc_stats_inc_http2_send_message_per_write(int value) {
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 13) {
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE, value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE,
+                             value);
     return;
   }
   union {
@@ -594,22 +572,19 @@ void grpc_stats_inc_http2_send_message_per_write(grpc_exec_ctx* exec_ctx,
         grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
     _bkt.dbl = grpc_stats_table_6[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE, bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE,
+                             bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                           GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_6, 64));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_6, 64));
 }
-void grpc_stats_inc_http2_send_trailing_metadata_per_write(
-    grpc_exec_ctx* exec_ctx, int value) {
+void grpc_stats_inc_http2_send_trailing_metadata_per_write(int value) {
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 13) {
     GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE,
-        value);
+        GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE, value);
     return;
   }
   union {
@@ -623,21 +598,18 @@ void grpc_stats_inc_http2_send_trailing_metadata_per_write(
     _bkt.dbl = grpc_stats_table_6[bucket];
     bucket -= (_val.uint < _bkt.uint);
     GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE,
-        bucket);
+        GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE, bucket);
     return;
   }
   GRPC_STATS_INC_HISTOGRAM(
-      (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE,
-      grpc_stats_histo_find_bucket_slow((exec_ctx), value, grpc_stats_table_6,
-                                        64));
+      GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_6, 64));
 }
-void grpc_stats_inc_http2_send_flowctl_per_write(grpc_exec_ctx* exec_ctx,
-                                                 int value) {
+void grpc_stats_inc_http2_send_flowctl_per_write(int value) {
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 13) {
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE, value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE,
+                             value);
     return;
   }
   union {
@@ -650,20 +622,18 @@ void grpc_stats_inc_http2_send_flowctl_per_write(grpc_exec_ctx* exec_ctx,
         grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
     _bkt.dbl = grpc_stats_table_6[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE, bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE,
+                             bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                           GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_6, 64));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_6, 64));
 }
-void grpc_stats_inc_server_cqs_checked(grpc_exec_ctx* exec_ctx, int value) {
+void grpc_stats_inc_server_cqs_checked(int value) {
   value = GPR_CLAMP(value, 0, 64);
   if (value < 3) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                             GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED, value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED, value);
     return;
   }
   union {
@@ -676,13 +646,12 @@ void grpc_stats_inc_server_cqs_checked(grpc_exec_ctx* exec_ctx, int value) {
         grpc_stats_table_9[((_val.uint - 4613937818241073152ull) >> 51)] + 3;
     _bkt.dbl = grpc_stats_table_8[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                             GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED, bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED, bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_8, 8));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_8, 8));
 }
 const int grpc_stats_histo_buckets[13] = {64, 128, 64, 64, 64, 64, 64,
                                           64, 64,  64, 64, 64, 8};
@@ -694,7 +663,7 @@ const int* const grpc_stats_histo_bucket_boundaries[13] = {
     grpc_stats_table_6, grpc_stats_table_4, grpc_stats_table_6,
     grpc_stats_table_6, grpc_stats_table_6, grpc_stats_table_6,
     grpc_stats_table_8};
-void (*const grpc_stats_inc_histogram[13])(grpc_exec_ctx* exec_ctx, int x) = {
+void (*const grpc_stats_inc_histogram[13])(int x) = {
     grpc_stats_inc_call_initial_size,
     grpc_stats_inc_poll_events_returned,
     grpc_stats_inc_tcp_write_size,
diff --git a/src/core/lib/debug/stats_data.h b/src/core/lib/debug/stats_data.h
index 8a5bc97389..4504be33e7 100644
--- a/src/core/lib/debug/stats_data.h
+++ b/src/core/lib/debug/stats_data.h
@@ -172,330 +172,262 @@ typedef enum {
   GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED_BUCKETS = 8,
   GRPC_STATS_HISTOGRAM_BUCKETS = 840
 } grpc_stats_histogram_constants;
-#define GRPC_STATS_INC_CLIENT_CALLS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_CLIENT_CALLS_CREATED)
-#define GRPC_STATS_INC_SERVER_CALLS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SERVER_CALLS_CREATED)
-#define GRPC_STATS_INC_CQS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_CQS_CREATED)
-#define GRPC_STATS_INC_CLIENT_CHANNELS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_CLIENT_CHANNELS_CREATED)
-#define GRPC_STATS_INC_CLIENT_SUBCHANNELS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_CLIENT_SUBCHANNELS_CREATED)
-#define GRPC_STATS_INC_SERVER_CHANNELS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SERVER_CHANNELS_CREATED)
-#define GRPC_STATS_INC_SYSCALL_POLL(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SYSCALL_POLL)
-#define GRPC_STATS_INC_SYSCALL_WAIT(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SYSCALL_WAIT)
-#define GRPC_STATS_INC_POLLSET_KICK(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_POLLSET_KICK)
-#define GRPC_STATS_INC_POLLSET_KICKED_WITHOUT_POLLER(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                           \
-                         GRPC_STATS_COUNTER_POLLSET_KICKED_WITHOUT_POLLER)
-#define GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_POLLSET_KICKED_AGAIN)
-#define GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_POLLSET_KICK_WAKEUP_FD)
-#define GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_POLLSET_KICK_WAKEUP_CV)
-#define GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_POLLSET_KICK_OWN_THREAD)
-#define GRPC_STATS_INC_HISTOGRAM_SLOW_LOOKUPS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HISTOGRAM_SLOW_LOOKUPS)
-#define GRPC_STATS_INC_SYSCALL_WRITE(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SYSCALL_WRITE)
-#define GRPC_STATS_INC_SYSCALL_READ(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SYSCALL_READ)
-#define GRPC_STATS_INC_TCP_BACKUP_POLLERS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_TCP_BACKUP_POLLERS_CREATED)
-#define GRPC_STATS_INC_TCP_BACKUP_POLLER_POLLS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_TCP_BACKUP_POLLER_POLLS)
-#define GRPC_STATS_INC_HTTP2_OP_BATCHES(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_OP_BATCHES)
-#define GRPC_STATS_INC_HTTP2_OP_CANCEL(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_OP_CANCEL)
-#define GRPC_STATS_INC_HTTP2_OP_SEND_INITIAL_METADATA(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                            \
-                         GRPC_STATS_COUNTER_HTTP2_OP_SEND_INITIAL_METADATA)
-#define GRPC_STATS_INC_HTTP2_OP_SEND_MESSAGE(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_OP_SEND_MESSAGE)
-#define GRPC_STATS_INC_HTTP2_OP_SEND_TRAILING_METADATA(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                             \
-                         GRPC_STATS_COUNTER_HTTP2_OP_SEND_TRAILING_METADATA)
-#define GRPC_STATS_INC_HTTP2_OP_RECV_INITIAL_METADATA(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                            \
-                         GRPC_STATS_COUNTER_HTTP2_OP_RECV_INITIAL_METADATA)
-#define GRPC_STATS_INC_HTTP2_OP_RECV_MESSAGE(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_OP_RECV_MESSAGE)
-#define GRPC_STATS_INC_HTTP2_OP_RECV_TRAILING_METADATA(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                             \
-                         GRPC_STATS_COUNTER_HTTP2_OP_RECV_TRAILING_METADATA)
-#define GRPC_STATS_INC_HTTP2_SETTINGS_WRITES(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_SETTINGS_WRITES)
-#define GRPC_STATS_INC_HTTP2_PINGS_SENT(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_PINGS_SENT)
-#define GRPC_STATS_INC_HTTP2_WRITES_BEGUN(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_WRITES_BEGUN)
-#define GRPC_STATS_INC_HTTP2_WRITES_OFFLOADED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_WRITES_OFFLOADED)
-#define GRPC_STATS_INC_HTTP2_WRITES_CONTINUED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_WRITES_CONTINUED)
-#define GRPC_STATS_INC_HTTP2_PARTIAL_WRITES(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_PARTIAL_WRITES)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_INITIAL_WRITE(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                  \
-      (exec_ctx),                                                          \
+#define GRPC_STATS_INC_CLIENT_CALLS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CLIENT_CALLS_CREATED)
+#define GRPC_STATS_INC_SERVER_CALLS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SERVER_CALLS_CREATED)
+#define GRPC_STATS_INC_CQS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CQS_CREATED)
+#define GRPC_STATS_INC_CLIENT_CHANNELS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CLIENT_CHANNELS_CREATED)
+#define GRPC_STATS_INC_CLIENT_SUBCHANNELS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CLIENT_SUBCHANNELS_CREATED)
+#define GRPC_STATS_INC_SERVER_CHANNELS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SERVER_CHANNELS_CREATED)
+#define GRPC_STATS_INC_SYSCALL_POLL() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SYSCALL_POLL)
+#define GRPC_STATS_INC_SYSCALL_WAIT() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SYSCALL_WAIT)
+#define GRPC_STATS_INC_POLLSET_KICK() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_POLLSET_KICK)
+#define GRPC_STATS_INC_POLLSET_KICKED_WITHOUT_POLLER() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_POLLSET_KICKED_WITHOUT_POLLER)
+#define GRPC_STATS_INC_POLLSET_KICKED_AGAIN() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_POLLSET_KICKED_AGAIN)
+#define GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_POLLSET_KICK_WAKEUP_FD)
+#define GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_POLLSET_KICK_WAKEUP_CV)
+#define GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_POLLSET_KICK_OWN_THREAD)
+#define GRPC_STATS_INC_HISTOGRAM_SLOW_LOOKUPS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HISTOGRAM_SLOW_LOOKUPS)
+#define GRPC_STATS_INC_SYSCALL_WRITE() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SYSCALL_WRITE)
+#define GRPC_STATS_INC_SYSCALL_READ() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SYSCALL_READ)
+#define GRPC_STATS_INC_TCP_BACKUP_POLLERS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_TCP_BACKUP_POLLERS_CREATED)
+#define GRPC_STATS_INC_TCP_BACKUP_POLLER_POLLS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_TCP_BACKUP_POLLER_POLLS)
+#define GRPC_STATS_INC_HTTP2_OP_BATCHES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_BATCHES)
+#define GRPC_STATS_INC_HTTP2_OP_CANCEL() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_CANCEL)
+#define GRPC_STATS_INC_HTTP2_OP_SEND_INITIAL_METADATA() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_SEND_INITIAL_METADATA)
+#define GRPC_STATS_INC_HTTP2_OP_SEND_MESSAGE() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_SEND_MESSAGE)
+#define GRPC_STATS_INC_HTTP2_OP_SEND_TRAILING_METADATA() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_SEND_TRAILING_METADATA)
+#define GRPC_STATS_INC_HTTP2_OP_RECV_INITIAL_METADATA() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_RECV_INITIAL_METADATA)
+#define GRPC_STATS_INC_HTTP2_OP_RECV_MESSAGE() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_RECV_MESSAGE)
+#define GRPC_STATS_INC_HTTP2_OP_RECV_TRAILING_METADATA() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_RECV_TRAILING_METADATA)
+#define GRPC_STATS_INC_HTTP2_SETTINGS_WRITES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_SETTINGS_WRITES)
+#define GRPC_STATS_INC_HTTP2_PINGS_SENT() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_PINGS_SENT)
+#define GRPC_STATS_INC_HTTP2_WRITES_BEGUN() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_WRITES_BEGUN)
+#define GRPC_STATS_INC_HTTP2_WRITES_OFFLOADED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_WRITES_OFFLOADED)
+#define GRPC_STATS_INC_HTTP2_WRITES_CONTINUED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_WRITES_CONTINUED)
+#define GRPC_STATS_INC_HTTP2_PARTIAL_WRITES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_PARTIAL_WRITES)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_INITIAL_WRITE() \
+  GRPC_STATS_INC_COUNTER(                                          \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_INITIAL_WRITE)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_START_NEW_STREAM(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                     \
-      (exec_ctx),                                                             \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_START_NEW_STREAM() \
+  GRPC_STATS_INC_COUNTER(                                             \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_START_NEW_STREAM)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                 \
-      (exec_ctx), GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA( \
-    exec_ctx)                                                             \
-  GRPC_STATS_INC_COUNTER(                                                 \
-      (exec_ctx),                                                         \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_TRAILING_METADATA( \
-    exec_ctx)                                                              \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE() \
+  GRPC_STATS_INC_COUNTER(                                         \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA() \
   GRPC_STATS_INC_COUNTER(                                                  \
-      (exec_ctx),                                                          \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_TRAILING_METADATA() \
+  GRPC_STATS_INC_COUNTER(                                                   \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_TRAILING_METADATA)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RETRY_SEND_PING(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                    \
-      (exec_ctx),                                                            \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RETRY_SEND_PING() \
+  GRPC_STATS_INC_COUNTER(                                            \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_RETRY_SEND_PING)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CONTINUE_PINGS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                   \
-      (exec_ctx),                                                           \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CONTINUE_PINGS() \
+  GRPC_STATS_INC_COUNTER(                                           \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_CONTINUE_PINGS)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                \
-      (exec_ctx), GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                               \
-      (exec_ctx), GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CLOSE_FROM_API(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                   \
-      (exec_ctx),                                                           \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT() \
+  GRPC_STATS_INC_COUNTER(                                        \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM() \
+  GRPC_STATS_INC_COUNTER(                                       \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CLOSE_FROM_API() \
+  GRPC_STATS_INC_COUNTER(                                           \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_CLOSE_FROM_API)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_STREAM_FLOW_CONTROL( \
-    exec_ctx)                                                           \
-  GRPC_STATS_INC_COUNTER(                                               \
-      (exec_ctx),                                                       \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_STREAM_FLOW_CONTROL() \
+  GRPC_STATS_INC_COUNTER(                                                \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_STREAM_FLOW_CONTROL)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL( \
-    exec_ctx)                                                              \
-  GRPC_STATS_INC_COUNTER(                                                  \
-      (exec_ctx),                                                          \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL() \
+  GRPC_STATS_INC_COUNTER(                                                   \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_SETTINGS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                  \
-      (exec_ctx),                                                          \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_SETTINGS() \
+  GRPC_STATS_INC_COUNTER(                                          \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_SETTINGS)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_BDP_ESTIMATOR_PING( \
-    exec_ctx)                                                          \
-  GRPC_STATS_INC_COUNTER(                                              \
-      (exec_ctx),                                                      \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_BDP_ESTIMATOR_PING() \
+  GRPC_STATS_INC_COUNTER(                                               \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_BDP_ESTIMATOR_PING)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_SETTING( \
-    exec_ctx)                                                                         \
-  GRPC_STATS_INC_COUNTER(                                                             \
-      (exec_ctx),                                                                     \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_SETTING() \
+  GRPC_STATS_INC_COUNTER(                                                              \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_SETTING)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_UPDATE( \
-    exec_ctx)                                                                        \
-  GRPC_STATS_INC_COUNTER(                                                            \
-      (exec_ctx),                                                                    \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_UPDATE() \
+  GRPC_STATS_INC_COUNTER(                                                             \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_UPDATE)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_APPLICATION_PING(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                     \
-      (exec_ctx),                                                             \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_APPLICATION_PING() \
+  GRPC_STATS_INC_COUNTER(                                             \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_APPLICATION_PING)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_KEEPALIVE_PING(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                   \
-      (exec_ctx),                                                           \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_KEEPALIVE_PING() \
+  GRPC_STATS_INC_COUNTER(                                           \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_KEEPALIVE_PING)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED( \
-    exec_ctx)                                                                        \
-  GRPC_STATS_INC_COUNTER(                                                            \
-      (exec_ctx),                                                                    \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED() \
+  GRPC_STATS_INC_COUNTER(                                                             \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                  \
-      (exec_ctx),                                                          \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE() \
+  GRPC_STATS_INC_COUNTER(                                          \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                     \
-      (exec_ctx),                                                             \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM)
-#define GRPC_STATS_INC_HTTP2_SPURIOUS_WRITES_BEGUN(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                         \
-                         GRPC_STATS_COUNTER_HTTP2_SPURIOUS_WRITES_BEGUN)
-#define GRPC_STATS_INC_HPACK_RECV_INDEXED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_RECV_INDEXED)
-#define GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_INCIDX)
-#define GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX_V(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_INCIDX_V)
-#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NOTIDX)
-#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX_V(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NOTIDX_V)
-#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NVRIDX)
-#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX_V(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NVRIDX_V)
-#define GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_RECV_UNCOMPRESSED)
-#define GRPC_STATS_INC_HPACK_RECV_HUFFMAN(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_RECV_HUFFMAN)
-#define GRPC_STATS_INC_HPACK_RECV_BINARY(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_RECV_BINARY)
-#define GRPC_STATS_INC_HPACK_RECV_BINARY_BASE64(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_RECV_BINARY_BASE64)
-#define GRPC_STATS_INC_HPACK_SEND_INDEXED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_SEND_INDEXED)
-#define GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_INCIDX)
-#define GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX_V(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_INCIDX_V)
-#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NOTIDX)
-#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX_V(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NOTIDX_V)
-#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NVRIDX(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NVRIDX)
-#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NVRIDX_V(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NVRIDX_V)
-#define GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_SEND_UNCOMPRESSED)
-#define GRPC_STATS_INC_HPACK_SEND_HUFFMAN(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_SEND_HUFFMAN)
-#define GRPC_STATS_INC_HPACK_SEND_BINARY(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_SEND_BINARY)
-#define GRPC_STATS_INC_HPACK_SEND_BINARY_BASE64(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_SEND_BINARY_BASE64)
-#define GRPC_STATS_INC_COMBINER_LOCKS_INITIATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_COMBINER_LOCKS_INITIATED)
-#define GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_ITEMS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                            \
-                         GRPC_STATS_COUNTER_COMBINER_LOCKS_SCHEDULED_ITEMS)
-#define GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS(exec_ctx) \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM() \
   GRPC_STATS_INC_COUNTER(                                             \
-      (exec_ctx), GRPC_STATS_COUNTER_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS)
-#define GRPC_STATS_INC_COMBINER_LOCKS_OFFLOADED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_COMBINER_LOCKS_OFFLOADED)
-#define GRPC_STATS_INC_CALL_COMBINER_LOCKS_INITIATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                           \
-                         GRPC_STATS_COUNTER_CALL_COMBINER_LOCKS_INITIATED)
-#define GRPC_STATS_INC_CALL_COMBINER_LOCKS_SCHEDULED_ITEMS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                            \
-      (exec_ctx), GRPC_STATS_COUNTER_CALL_COMBINER_LOCKS_SCHEDULED_ITEMS)
-#define GRPC_STATS_INC_CALL_COMBINER_SET_NOTIFY_ON_CANCEL(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                           \
-      (exec_ctx), GRPC_STATS_COUNTER_CALL_COMBINER_SET_NOTIFY_ON_CANCEL)
-#define GRPC_STATS_INC_CALL_COMBINER_CANCELLED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_CALL_COMBINER_CANCELLED)
-#define GRPC_STATS_INC_EXECUTOR_SCHEDULED_SHORT_ITEMS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                            \
-                         GRPC_STATS_COUNTER_EXECUTOR_SCHEDULED_SHORT_ITEMS)
-#define GRPC_STATS_INC_EXECUTOR_SCHEDULED_LONG_ITEMS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                           \
-                         GRPC_STATS_COUNTER_EXECUTOR_SCHEDULED_LONG_ITEMS)
-#define GRPC_STATS_INC_EXECUTOR_SCHEDULED_TO_SELF(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_EXECUTOR_SCHEDULED_TO_SELF)
-#define GRPC_STATS_INC_EXECUTOR_WAKEUP_INITIATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                       \
-                         GRPC_STATS_COUNTER_EXECUTOR_WAKEUP_INITIATED)
-#define GRPC_STATS_INC_EXECUTOR_QUEUE_DRAINED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_EXECUTOR_QUEUE_DRAINED)
-#define GRPC_STATS_INC_EXECUTOR_PUSH_RETRIES(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_EXECUTOR_PUSH_RETRIES)
-#define GRPC_STATS_INC_SERVER_REQUESTED_CALLS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SERVER_REQUESTED_CALLS)
-#define GRPC_STATS_INC_SERVER_SLOWPATH_REQUESTS_QUEUED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                             \
-                         GRPC_STATS_COUNTER_SERVER_SLOWPATH_REQUESTS_QUEUED)
-#define GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_FAILURES(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                          \
-                         GRPC_STATS_COUNTER_CQ_EV_QUEUE_TRYLOCK_FAILURES)
-#define GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_SUCCESSES(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                           \
-                         GRPC_STATS_COUNTER_CQ_EV_QUEUE_TRYLOCK_SUCCESSES)
-#define GRPC_STATS_INC_CQ_EV_QUEUE_TRANSIENT_POP_FAILURES(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                           \
-      (exec_ctx), GRPC_STATS_COUNTER_CQ_EV_QUEUE_TRANSIENT_POP_FAILURES)
-#define GRPC_STATS_INC_CALL_INITIAL_SIZE(exec_ctx, value) \
-  grpc_stats_inc_call_initial_size((exec_ctx), (int)(value))
-void grpc_stats_inc_call_initial_size(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_POLL_EVENTS_RETURNED(exec_ctx, value) \
-  grpc_stats_inc_poll_events_returned((exec_ctx), (int)(value))
-void grpc_stats_inc_poll_events_returned(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_TCP_WRITE_SIZE(exec_ctx, value) \
-  grpc_stats_inc_tcp_write_size((exec_ctx), (int)(value))
-void grpc_stats_inc_tcp_write_size(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_TCP_WRITE_IOV_SIZE(exec_ctx, value) \
-  grpc_stats_inc_tcp_write_iov_size((exec_ctx), (int)(value))
-void grpc_stats_inc_tcp_write_iov_size(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_TCP_READ_SIZE(exec_ctx, value) \
-  grpc_stats_inc_tcp_read_size((exec_ctx), (int)(value))
-void grpc_stats_inc_tcp_read_size(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_TCP_READ_OFFER(exec_ctx, value) \
-  grpc_stats_inc_tcp_read_offer((exec_ctx), (int)(value))
-void grpc_stats_inc_tcp_read_offer(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_TCP_READ_OFFER_IOV_SIZE(exec_ctx, value) \
-  grpc_stats_inc_tcp_read_offer_iov_size((exec_ctx), (int)(value))
-void grpc_stats_inc_tcp_read_offer_iov_size(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_HTTP2_SEND_MESSAGE_SIZE(exec_ctx, value) \
-  grpc_stats_inc_http2_send_message_size((exec_ctx), (int)(value))
-void grpc_stats_inc_http2_send_message_size(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_HTTP2_SEND_INITIAL_METADATA_PER_WRITE(exec_ctx, value) \
-  grpc_stats_inc_http2_send_initial_metadata_per_write((exec_ctx), (int)(value))
-void grpc_stats_inc_http2_send_initial_metadata_per_write(
-    grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_HTTP2_SEND_MESSAGE_PER_WRITE(exec_ctx, value) \
-  grpc_stats_inc_http2_send_message_per_write((exec_ctx), (int)(value))
-void grpc_stats_inc_http2_send_message_per_write(grpc_exec_ctx* exec_ctx,
-                                                 int x);
-#define GRPC_STATS_INC_HTTP2_SEND_TRAILING_METADATA_PER_WRITE(exec_ctx, value) \
-  grpc_stats_inc_http2_send_trailing_metadata_per_write((exec_ctx),            \
-                                                        (int)(value))
-void grpc_stats_inc_http2_send_trailing_metadata_per_write(
-    grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_HTTP2_SEND_FLOWCTL_PER_WRITE(exec_ctx, value) \
-  grpc_stats_inc_http2_send_flowctl_per_write((exec_ctx), (int)(value))
-void grpc_stats_inc_http2_send_flowctl_per_write(grpc_exec_ctx* exec_ctx,
-                                                 int x);
-#define GRPC_STATS_INC_SERVER_CQS_CHECKED(exec_ctx, value) \
-  grpc_stats_inc_server_cqs_checked((exec_ctx), (int)(value))
-void grpc_stats_inc_server_cqs_checked(grpc_exec_ctx* exec_ctx, int x);
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM)
+#define GRPC_STATS_INC_HTTP2_SPURIOUS_WRITES_BEGUN() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_SPURIOUS_WRITES_BEGUN)
+#define GRPC_STATS_INC_HPACK_RECV_INDEXED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_INDEXED)
+#define GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_INCIDX)
+#define GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX_V() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_INCIDX_V)
+#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NOTIDX)
+#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX_V() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NOTIDX_V)
+#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NVRIDX)
+#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX_V() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NVRIDX_V)
+#define GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_UNCOMPRESSED)
+#define GRPC_STATS_INC_HPACK_RECV_HUFFMAN() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_HUFFMAN)
+#define GRPC_STATS_INC_HPACK_RECV_BINARY() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_BINARY)
+#define GRPC_STATS_INC_HPACK_RECV_BINARY_BASE64() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_BINARY_BASE64)
+#define GRPC_STATS_INC_HPACK_SEND_INDEXED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_INDEXED)
+#define GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_INCIDX)
+#define GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX_V() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_INCIDX_V)
+#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NOTIDX)
+#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX_V() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NOTIDX_V)
+#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NVRIDX() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NVRIDX)
+#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NVRIDX_V() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NVRIDX_V)
+#define GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_UNCOMPRESSED)
+#define GRPC_STATS_INC_HPACK_SEND_HUFFMAN() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_HUFFMAN)
+#define GRPC_STATS_INC_HPACK_SEND_BINARY() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_BINARY)
+#define GRPC_STATS_INC_HPACK_SEND_BINARY_BASE64() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_BINARY_BASE64)
+#define GRPC_STATS_INC_COMBINER_LOCKS_INITIATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_COMBINER_LOCKS_INITIATED)
+#define GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_ITEMS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_COMBINER_LOCKS_SCHEDULED_ITEMS)
+#define GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS() \
+  GRPC_STATS_INC_COUNTER(                                     \
+      GRPC_STATS_COUNTER_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS)
+#define GRPC_STATS_INC_COMBINER_LOCKS_OFFLOADED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_COMBINER_LOCKS_OFFLOADED)
+#define GRPC_STATS_INC_CALL_COMBINER_LOCKS_INITIATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CALL_COMBINER_LOCKS_INITIATED)
+#define GRPC_STATS_INC_CALL_COMBINER_LOCKS_SCHEDULED_ITEMS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CALL_COMBINER_LOCKS_SCHEDULED_ITEMS)
+#define GRPC_STATS_INC_CALL_COMBINER_SET_NOTIFY_ON_CANCEL() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CALL_COMBINER_SET_NOTIFY_ON_CANCEL)
+#define GRPC_STATS_INC_CALL_COMBINER_CANCELLED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CALL_COMBINER_CANCELLED)
+#define GRPC_STATS_INC_EXECUTOR_SCHEDULED_SHORT_ITEMS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_EXECUTOR_SCHEDULED_SHORT_ITEMS)
+#define GRPC_STATS_INC_EXECUTOR_SCHEDULED_LONG_ITEMS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_EXECUTOR_SCHEDULED_LONG_ITEMS)
+#define GRPC_STATS_INC_EXECUTOR_SCHEDULED_TO_SELF() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_EXECUTOR_SCHEDULED_TO_SELF)
+#define GRPC_STATS_INC_EXECUTOR_WAKEUP_INITIATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_EXECUTOR_WAKEUP_INITIATED)
+#define GRPC_STATS_INC_EXECUTOR_QUEUE_DRAINED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_EXECUTOR_QUEUE_DRAINED)
+#define GRPC_STATS_INC_EXECUTOR_PUSH_RETRIES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_EXECUTOR_PUSH_RETRIES)
+#define GRPC_STATS_INC_SERVER_REQUESTED_CALLS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SERVER_REQUESTED_CALLS)
+#define GRPC_STATS_INC_SERVER_SLOWPATH_REQUESTS_QUEUED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SERVER_SLOWPATH_REQUESTS_QUEUED)
+#define GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_FAILURES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CQ_EV_QUEUE_TRYLOCK_FAILURES)
+#define GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_SUCCESSES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CQ_EV_QUEUE_TRYLOCK_SUCCESSES)
+#define GRPC_STATS_INC_CQ_EV_QUEUE_TRANSIENT_POP_FAILURES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CQ_EV_QUEUE_TRANSIENT_POP_FAILURES)
+#define GRPC_STATS_INC_CALL_INITIAL_SIZE(value) \
+  grpc_stats_inc_call_initial_size((int)(value))
+void grpc_stats_inc_call_initial_size(int x);
+#define GRPC_STATS_INC_POLL_EVENTS_RETURNED(value) \
+  grpc_stats_inc_poll_events_returned((int)(value))
+void grpc_stats_inc_poll_events_returned(int x);
+#define GRPC_STATS_INC_TCP_WRITE_SIZE(value) \
+  grpc_stats_inc_tcp_write_size((int)(value))
+void grpc_stats_inc_tcp_write_size(int x);
+#define GRPC_STATS_INC_TCP_WRITE_IOV_SIZE(value) \
+  grpc_stats_inc_tcp_write_iov_size((int)(value))
+void grpc_stats_inc_tcp_write_iov_size(int x);
+#define GRPC_STATS_INC_TCP_READ_SIZE(value) \
+  grpc_stats_inc_tcp_read_size((int)(value))
+void grpc_stats_inc_tcp_read_size(int x);
+#define GRPC_STATS_INC_TCP_READ_OFFER(value) \
+  grpc_stats_inc_tcp_read_offer((int)(value))
+void grpc_stats_inc_tcp_read_offer(int x);
+#define GRPC_STATS_INC_TCP_READ_OFFER_IOV_SIZE(value) \
+  grpc_stats_inc_tcp_read_offer_iov_size((int)(value))
+void grpc_stats_inc_tcp_read_offer_iov_size(int x);
+#define GRPC_STATS_INC_HTTP2_SEND_MESSAGE_SIZE(value) \
+  grpc_stats_inc_http2_send_message_size((int)(value))
+void grpc_stats_inc_http2_send_message_size(int x);
+#define GRPC_STATS_INC_HTTP2_SEND_INITIAL_METADATA_PER_WRITE(value) \
+  grpc_stats_inc_http2_send_initial_metadata_per_write((int)(value))
+void grpc_stats_inc_http2_send_initial_metadata_per_write(int x);
+#define GRPC_STATS_INC_HTTP2_SEND_MESSAGE_PER_WRITE(value) \
+  grpc_stats_inc_http2_send_message_per_write((int)(value))
+void grpc_stats_inc_http2_send_message_per_write(int x);
+#define GRPC_STATS_INC_HTTP2_SEND_TRAILING_METADATA_PER_WRITE(value) \
+  grpc_stats_inc_http2_send_trailing_metadata_per_write((int)(value))
+void grpc_stats_inc_http2_send_trailing_metadata_per_write(int x);
+#define GRPC_STATS_INC_HTTP2_SEND_FLOWCTL_PER_WRITE(value) \
+  grpc_stats_inc_http2_send_flowctl_per_write((int)(value))
+void grpc_stats_inc_http2_send_flowctl_per_write(int x);
+#define GRPC_STATS_INC_SERVER_CQS_CHECKED(value) \
+  grpc_stats_inc_server_cqs_checked((int)(value))
+void grpc_stats_inc_server_cqs_checked(int x);
 extern const int grpc_stats_histo_buckets[13];
 extern const int grpc_stats_histo_start[13];
 extern const int* const grpc_stats_histo_bucket_boundaries[13];
-extern void (*const grpc_stats_inc_histogram[13])(grpc_exec_ctx* exec_ctx,
-                                                  int x);
+extern void (*const grpc_stats_inc_histogram[13])(int x);
 
 #endif /* GRPC_CORE_LIB_DEBUG_STATS_DATA_H */
diff --git a/src/core/lib/http/httpcli.cc b/src/core/lib/http/httpcli.cc
index 73b484b06d..ed874c4265 100644
--- a/src/core/lib/http/httpcli.cc
+++ b/src/core/lib/http/httpcli.cc
@@ -63,13 +63,11 @@ typedef struct {
 static grpc_httpcli_get_override g_get_override = nullptr;
 static grpc_httpcli_post_override g_post_override = nullptr;
 
-static void plaintext_handshake(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_endpoint* endpoint, const char* host,
-                                grpc_millis deadline,
-                                void (*on_done)(grpc_exec_ctx* exec_ctx,
-                                                void* arg,
+static void plaintext_handshake(void* arg, grpc_endpoint* endpoint,
+                                const char* host, grpc_millis deadline,
+                                void (*on_done)(void* arg,
                                                 grpc_endpoint* endpoint)) {
-  on_done(exec_ctx, arg, endpoint);
+  on_done(arg, endpoint);
 }
 
 const grpc_httpcli_handshaker grpc_httpcli_plaintext = {"http",
@@ -79,34 +77,31 @@ void grpc_httpcli_context_init(grpc_httpcli_context* context) {
   context->pollset_set = grpc_pollset_set_create();
 }
 
-void grpc_httpcli_context_destroy(grpc_exec_ctx* exec_ctx,
-                                  grpc_httpcli_context* context) {
-  grpc_pollset_set_destroy(exec_ctx, context->pollset_set);
+void grpc_httpcli_context_destroy(grpc_httpcli_context* context) {
+  grpc_pollset_set_destroy(context->pollset_set);
 }
 
-static void next_address(grpc_exec_ctx* exec_ctx, internal_request* req,
-                         grpc_error* due_to_error);
+static void next_address(internal_request* req, grpc_error* due_to_error);
 
-static void finish(grpc_exec_ctx* exec_ctx, internal_request* req,
-                   grpc_error* error) {
-  grpc_polling_entity_del_from_pollset_set(exec_ctx, req->pollent,
+static void finish(internal_request* req, grpc_error* error) {
+  grpc_polling_entity_del_from_pollset_set(req->pollent,
                                            req->context->pollset_set);
-  GRPC_CLOSURE_SCHED(exec_ctx, req->on_done, error);
+  GRPC_CLOSURE_SCHED(req->on_done, error);
   grpc_http_parser_destroy(&req->parser);
   if (req->addresses != nullptr) {
     grpc_resolved_addresses_destroy(req->addresses);
   }
   if (req->ep != nullptr) {
-    grpc_endpoint_destroy(exec_ctx, req->ep);
+    grpc_endpoint_destroy(req->ep);
   }
-  grpc_slice_unref_internal(exec_ctx, req->request_text);
+  grpc_slice_unref_internal(req->request_text);
   gpr_free(req->host);
   gpr_free(req->ssl_host_override);
   grpc_iomgr_unregister_object(&req->iomgr_obj);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &req->incoming);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &req->outgoing);
+  grpc_slice_buffer_destroy_internal(&req->incoming);
+  grpc_slice_buffer_destroy_internal(&req->outgoing);
   GRPC_ERROR_UNREF(req->overall_error);
-  grpc_resource_quota_unref_internal(exec_ctx, req->resource_quota);
+  grpc_resource_quota_unref_internal(req->resource_quota);
   gpr_free(req);
 }
 
@@ -124,12 +119,11 @@ static void append_error(internal_request* req, grpc_error* error) {
   gpr_free(addr_text);
 }
 
-static void do_read(grpc_exec_ctx* exec_ctx, internal_request* req) {
-  grpc_endpoint_read(exec_ctx, req->ep, &req->incoming, &req->on_read);
+static void do_read(internal_request* req) {
+  grpc_endpoint_read(req->ep, &req->incoming, &req->on_read);
 }
 
-static void on_read(grpc_exec_ctx* exec_ctx, void* user_data,
-                    grpc_error* error) {
+static void on_read(void* user_data, grpc_error* error) {
   internal_request* req = (internal_request*)user_data;
   size_t i;
 
@@ -139,77 +133,70 @@ static void on_read(grpc_exec_ctx* exec_ctx, void* user_data,
       grpc_error* err = grpc_http_parser_parse(
           &req->parser, req->incoming.slices[i], nullptr);
       if (err != GRPC_ERROR_NONE) {
-        finish(exec_ctx, req, err);
+        finish(req, err);
         return;
       }
     }
   }
 
   if (error == GRPC_ERROR_NONE) {
-    do_read(exec_ctx, req);
+    do_read(req);
   } else if (!req->have_read_byte) {
-    next_address(exec_ctx, req, GRPC_ERROR_REF(error));
+    next_address(req, GRPC_ERROR_REF(error));
   } else {
-    finish(exec_ctx, req, grpc_http_parser_eof(&req->parser));
+    finish(req, grpc_http_parser_eof(&req->parser));
   }
 }
 
-static void on_written(grpc_exec_ctx* exec_ctx, internal_request* req) {
-  do_read(exec_ctx, req);
-}
+static void on_written(internal_request* req) { do_read(req); }
 
-static void done_write(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void done_write(void* arg, grpc_error* error) {
   internal_request* req = (internal_request*)arg;
   if (error == GRPC_ERROR_NONE) {
-    on_written(exec_ctx, req);
+    on_written(req);
   } else {
-    next_address(exec_ctx, req, GRPC_ERROR_REF(error));
+    next_address(req, GRPC_ERROR_REF(error));
   }
 }
 
-static void start_write(grpc_exec_ctx* exec_ctx, internal_request* req) {
+static void start_write(internal_request* req) {
   grpc_slice_ref_internal(req->request_text);
   grpc_slice_buffer_add(&req->outgoing, req->request_text);
-  grpc_endpoint_write(exec_ctx, req->ep, &req->outgoing, &req->done_write);
+  grpc_endpoint_write(req->ep, &req->outgoing, &req->done_write);
 }
 
-static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_endpoint* ep) {
+static void on_handshake_done(void* arg, grpc_endpoint* ep) {
   internal_request* req = (internal_request*)arg;
 
   if (!ep) {
-    next_address(
-        exec_ctx, req,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Unexplained handshake failure"));
+    next_address(req, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                          "Unexplained handshake failure"));
     return;
   }
 
   req->ep = ep;
-  start_write(exec_ctx, req);
+  start_write(req);
 }
 
-static void on_connected(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
+static void on_connected(void* arg, grpc_error* error) {
   internal_request* req = (internal_request*)arg;
 
   if (!req->ep) {
-    next_address(exec_ctx, req, GRPC_ERROR_REF(error));
+    next_address(req, GRPC_ERROR_REF(error));
     return;
   }
   req->handshaker->handshake(
-      exec_ctx, req, req->ep,
-      req->ssl_host_override ? req->ssl_host_override : req->host,
+      req, req->ep, req->ssl_host_override ? req->ssl_host_override : req->host,
       req->deadline, on_handshake_done);
 }
 
-static void next_address(grpc_exec_ctx* exec_ctx, internal_request* req,
-                         grpc_error* error) {
+static void next_address(internal_request* req, grpc_error* error) {
   grpc_resolved_address* addr;
   if (error != GRPC_ERROR_NONE) {
     append_error(req, error);
   }
   if (req->next_address == req->addresses->naddrs) {
-    finish(exec_ctx, req,
+    finish(req,
            GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                "Failed HTTP requests to all targets", &req->overall_error, 1));
     return;
@@ -221,23 +208,21 @@ static void next_address(grpc_exec_ctx* exec_ctx, internal_request* req,
       (char*)GRPC_ARG_RESOURCE_QUOTA, req->resource_quota,
       grpc_resource_quota_arg_vtable());
   grpc_channel_args args = {1, &arg};
-  grpc_tcp_client_connect(exec_ctx, &req->connected, &req->ep,
-                          req->context->pollset_set, &args, addr,
-                          req->deadline);
+  grpc_tcp_client_connect(&req->connected, &req->ep, req->context->pollset_set,
+                          &args, addr, req->deadline);
 }
 
-static void on_resolved(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_resolved(void* arg, grpc_error* error) {
   internal_request* req = (internal_request*)arg;
   if (error != GRPC_ERROR_NONE) {
-    finish(exec_ctx, req, GRPC_ERROR_REF(error));
+    finish(req, GRPC_ERROR_REF(error));
     return;
   }
   req->next_address = 0;
-  next_address(exec_ctx, req, GRPC_ERROR_NONE);
+  next_address(req, GRPC_ERROR_NONE);
 }
 
-static void internal_request_begin(grpc_exec_ctx* exec_ctx,
-                                   grpc_httpcli_context* context,
+static void internal_request_begin(grpc_httpcli_context* context,
                                    grpc_polling_entity* pollent,
                                    grpc_resource_quota* resource_quota,
                                    const grpc_httpcli_request* request,
@@ -267,33 +252,31 @@ static void internal_request_begin(grpc_exec_ctx* exec_ctx,
   req->ssl_host_override = gpr_strdup(request->ssl_host_override);
 
   GPR_ASSERT(pollent);
-  grpc_polling_entity_add_to_pollset_set(exec_ctx, req->pollent,
+  grpc_polling_entity_add_to_pollset_set(req->pollent,
                                          req->context->pollset_set);
   grpc_resolve_address(
-      exec_ctx, request->host, req->handshaker->default_port,
-      req->context->pollset_set,
+      request->host, req->handshaker->default_port, req->context->pollset_set,
       GRPC_CLOSURE_CREATE(on_resolved, req, grpc_schedule_on_exec_ctx),
       &req->addresses);
 }
 
-void grpc_httpcli_get(grpc_exec_ctx* exec_ctx, grpc_httpcli_context* context,
+void grpc_httpcli_get(grpc_httpcli_context* context,
                       grpc_polling_entity* pollent,
                       grpc_resource_quota* resource_quota,
                       const grpc_httpcli_request* request, grpc_millis deadline,
                       grpc_closure* on_done, grpc_httpcli_response* response) {
   char* name;
-  if (g_get_override &&
-      g_get_override(exec_ctx, request, deadline, on_done, response)) {
+  if (g_get_override && g_get_override(request, deadline, on_done, response)) {
     return;
   }
   gpr_asprintf(&name, "HTTP:GET:%s:%s", request->host, request->http.path);
-  internal_request_begin(exec_ctx, context, pollent, resource_quota, request,
-                         deadline, on_done, response, name,
+  internal_request_begin(context, pollent, resource_quota, request, deadline,
+                         on_done, response, name,
                          grpc_httpcli_format_get_request(request));
   gpr_free(name);
 }
 
-void grpc_httpcli_post(grpc_exec_ctx* exec_ctx, grpc_httpcli_context* context,
+void grpc_httpcli_post(grpc_httpcli_context* context,
                        grpc_polling_entity* pollent,
                        grpc_resource_quota* resource_quota,
                        const grpc_httpcli_request* request,
@@ -301,16 +284,14 @@ void grpc_httpcli_post(grpc_exec_ctx* exec_ctx, grpc_httpcli_context* context,
                        grpc_millis deadline, grpc_closure* on_done,
                        grpc_httpcli_response* response) {
   char* name;
-  if (g_post_override &&
-      g_post_override(exec_ctx, request, body_bytes, body_size, deadline,
-                      on_done, response)) {
+  if (g_post_override && g_post_override(request, body_bytes, body_size,
+                                         deadline, on_done, response)) {
     return;
   }
   gpr_asprintf(&name, "HTTP:POST:%s:%s", request->host, request->http.path);
   internal_request_begin(
-      exec_ctx, context, pollent, resource_quota, request, deadline, on_done,
-      response, name,
-      grpc_httpcli_format_post_request(request, body_bytes, body_size));
+      context, pollent, resource_quota, request, deadline, on_done, response,
+      name, grpc_httpcli_format_post_request(request, body_bytes, body_size));
   gpr_free(name);
 }
 
diff --git a/src/core/lib/http/httpcli.h b/src/core/lib/http/httpcli.h
index 6f675568bd..72d20cc7a3 100644
--- a/src/core/lib/http/httpcli.h
+++ b/src/core/lib/http/httpcli.h
@@ -41,10 +41,9 @@ typedef struct grpc_httpcli_context {
 
 typedef struct {
   const char* default_port;
-  void (*handshake)(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* endpoint,
-                    const char* host, grpc_millis deadline,
-                    void (*on_done)(grpc_exec_ctx* exec_ctx, void* arg,
-                                    grpc_endpoint* endpoint));
+  void (*handshake)(void* arg, grpc_endpoint* endpoint, const char* host,
+                    grpc_millis deadline,
+                    void (*on_done)(void* arg, grpc_endpoint* endpoint));
 } grpc_httpcli_handshaker;
 
 extern const grpc_httpcli_handshaker grpc_httpcli_plaintext;
@@ -68,8 +67,7 @@ typedef struct grpc_httpcli_request {
 typedef struct grpc_http_response grpc_httpcli_response;
 
 void grpc_httpcli_context_init(grpc_httpcli_context* context);
-void grpc_httpcli_context_destroy(grpc_exec_ctx* exec_ctx,
-                                  grpc_httpcli_context* context);
+void grpc_httpcli_context_destroy(grpc_httpcli_context* context);
 
 /* Asynchronously perform a HTTP GET.
    'context' specifies the http context under which to do the get
@@ -80,7 +78,7 @@ void grpc_httpcli_context_destroy(grpc_exec_ctx* exec_ctx,
      destroyed once the call returns
    'deadline' contains a deadline for the request (or gpr_inf_future)
    'on_response' is a callback to report results to */
-void grpc_httpcli_get(grpc_exec_ctx* exec_ctx, grpc_httpcli_context* context,
+void grpc_httpcli_get(grpc_httpcli_context* context,
                       grpc_polling_entity* pollent,
                       grpc_resource_quota* resource_quota,
                       const grpc_httpcli_request* request, grpc_millis deadline,
@@ -101,7 +99,7 @@ void grpc_httpcli_get(grpc_exec_ctx* exec_ctx, grpc_httpcli_context* context,
      lifetime of the request
    'on_response' is a callback to report results to
    Does not support ?var1=val1&var2=val2 in the path. */
-void grpc_httpcli_post(grpc_exec_ctx* exec_ctx, grpc_httpcli_context* context,
+void grpc_httpcli_post(grpc_httpcli_context* context,
                        grpc_polling_entity* pollent,
                        grpc_resource_quota* resource_quota,
                        const grpc_httpcli_request* request,
@@ -110,15 +108,16 @@ void grpc_httpcli_post(grpc_exec_ctx* exec_ctx, grpc_httpcli_context* context,
                        grpc_httpcli_response* response);
 
 /* override functions return 1 if they handled the request, 0 otherwise */
-typedef int (*grpc_httpcli_get_override)(grpc_exec_ctx* exec_ctx,
-                                         const grpc_httpcli_request* request,
+typedef int (*grpc_httpcli_get_override)(const grpc_httpcli_request* request,
                                          grpc_millis deadline,
                                          grpc_closure* on_complete,
                                          grpc_httpcli_response* response);
-typedef int (*grpc_httpcli_post_override)(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    const char* body_bytes, size_t body_size, grpc_millis deadline,
-    grpc_closure* on_complete, grpc_httpcli_response* response);
+typedef int (*grpc_httpcli_post_override)(const grpc_httpcli_request* request,
+                                          const char* body_bytes,
+                                          size_t body_size,
+                                          grpc_millis deadline,
+                                          grpc_closure* on_complete,
+                                          grpc_httpcli_response* response);
 
 void grpc_httpcli_set_override(grpc_httpcli_get_override get,
                                grpc_httpcli_post_override post);
diff --git a/src/core/lib/http/httpcli_security_connector.cc b/src/core/lib/http/httpcli_security_connector.cc
index dfcaee702b..bfb536a921 100644
--- a/src/core/lib/http/httpcli_security_connector.cc
+++ b/src/core/lib/http/httpcli_security_connector.cc
@@ -38,8 +38,7 @@ typedef struct {
   char* secure_peer_name;
 } grpc_httpcli_ssl_channel_security_connector;
 
-static void httpcli_ssl_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_security_connector* sc) {
+static void httpcli_ssl_destroy(grpc_security_connector* sc) {
   grpc_httpcli_ssl_channel_security_connector* c =
       (grpc_httpcli_ssl_channel_security_connector*)sc;
   if (c->handshaker_factory != nullptr) {
@@ -50,8 +49,7 @@ static void httpcli_ssl_destroy(grpc_exec_ctx* exec_ctx,
   gpr_free(sc);
 }
 
-static void httpcli_ssl_add_handshakers(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_security_connector* sc,
+static void httpcli_ssl_add_handshakers(grpc_channel_security_connector* sc,
                                         grpc_handshake_manager* handshake_mgr) {
   grpc_httpcli_ssl_channel_security_connector* c =
       (grpc_httpcli_ssl_channel_security_connector*)sc;
@@ -65,13 +63,11 @@ static void httpcli_ssl_add_handshakers(grpc_exec_ctx* exec_ctx,
     }
   }
   grpc_handshake_manager_add(
-      handshake_mgr,
-      grpc_security_handshaker_create(
-          exec_ctx, tsi_create_adapter_handshaker(handshaker), &sc->base));
+      handshake_mgr, grpc_security_handshaker_create(
+                         tsi_create_adapter_handshaker(handshaker), &sc->base));
 }
 
-static void httpcli_ssl_check_peer(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* sc, tsi_peer peer,
+static void httpcli_ssl_check_peer(grpc_security_connector* sc, tsi_peer peer,
                                    grpc_auth_context** auth_context,
                                    grpc_closure* on_peer_checked) {
   grpc_httpcli_ssl_channel_security_connector* c =
@@ -87,7 +83,7 @@ static void httpcli_ssl_check_peer(grpc_exec_ctx* exec_ctx,
     error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
     gpr_free(msg);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, on_peer_checked, error);
+  GRPC_CLOSURE_SCHED(on_peer_checked, error);
   tsi_peer_destruct(&peer);
 }
 
@@ -104,8 +100,8 @@ static grpc_security_connector_vtable httpcli_ssl_vtable = {
     httpcli_ssl_destroy, httpcli_ssl_check_peer, httpcli_ssl_cmp};
 
 static grpc_security_status httpcli_ssl_channel_security_connector_create(
-    grpc_exec_ctx* exec_ctx, const char* pem_root_certs,
-    const char* secure_peer_name, grpc_channel_security_connector** sc) {
+    const char* pem_root_certs, const char* secure_peer_name,
+    grpc_channel_security_connector** sc) {
   tsi_result result = TSI_OK;
   grpc_httpcli_ssl_channel_security_connector* c;
 
@@ -128,12 +124,12 @@ static grpc_security_status httpcli_ssl_channel_security_connector_create(
   if (result != TSI_OK) {
     gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.",
             tsi_result_to_string(result));
-    httpcli_ssl_destroy(exec_ctx, &c->base.base);
+    httpcli_ssl_destroy(&c->base.base);
     *sc = nullptr;
     return GRPC_SECURITY_ERROR;
   }
   // We don't actually need a channel credentials object in this case,
-  // but we set it to a non-NULL address so that we don't trigger
+  // but we set it to a non-nullptr address so that we don't trigger
   // assertions in grpc_channel_security_connector_cmp().
   c->base.channel_creds = (grpc_channel_credentials*)1;
   c->base.add_handshakers = httpcli_ssl_add_handshakers;
@@ -144,40 +140,37 @@ static grpc_security_status httpcli_ssl_channel_security_connector_create(
 /* handshaker */
 
 typedef struct {
-  void (*func)(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* endpoint);
+  void (*func)(void* arg, grpc_endpoint* endpoint);
   void* arg;
   grpc_handshake_manager* handshake_mgr;
 } on_done_closure;
 
-static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* error) {
+static void on_handshake_done(void* arg, grpc_error* error) {
   grpc_handshaker_args* args = (grpc_handshaker_args*)arg;
   on_done_closure* c = (on_done_closure*)args->user_data;
   if (error != GRPC_ERROR_NONE) {
     const char* msg = grpc_error_string(error);
     gpr_log(GPR_ERROR, "Secure transport setup failed: %s", msg);
 
-    c->func(exec_ctx, c->arg, nullptr);
+    c->func(c->arg, nullptr);
   } else {
-    grpc_channel_args_destroy(exec_ctx, args->args);
-    grpc_slice_buffer_destroy_internal(exec_ctx, args->read_buffer);
+    grpc_channel_args_destroy(args->args);
+    grpc_slice_buffer_destroy_internal(args->read_buffer);
     gpr_free(args->read_buffer);
-    c->func(exec_ctx, c->arg, args->endpoint);
+    c->func(c->arg, args->endpoint);
   }
-  grpc_handshake_manager_destroy(exec_ctx, c->handshake_mgr);
+  grpc_handshake_manager_destroy(c->handshake_mgr);
   gpr_free(c);
 }
 
-static void ssl_handshake(grpc_exec_ctx* exec_ctx, void* arg,
-                          grpc_endpoint* tcp, const char* host,
+static void ssl_handshake(void* arg, grpc_endpoint* tcp, const char* host,
                           grpc_millis deadline,
-                          void (*on_done)(grpc_exec_ctx* exec_ctx, void* arg,
-                                          grpc_endpoint* endpoint)) {
+                          void (*on_done)(void* arg, grpc_endpoint* endpoint)) {
   on_done_closure* c = (on_done_closure*)gpr_malloc(sizeof(*c));
   const char* pem_root_certs = grpc_get_default_ssl_roots();
   if (pem_root_certs == nullptr) {
     gpr_log(GPR_ERROR, "Could not get default pem root certs.");
-    on_done(exec_ctx, arg, nullptr);
+    on_done(arg, nullptr);
     gpr_free(c);
     return;
   }
@@ -185,16 +178,16 @@ static void ssl_handshake(grpc_exec_ctx* exec_ctx, void* arg,
   c->arg = arg;
   grpc_channel_security_connector* sc = nullptr;
   GPR_ASSERT(httpcli_ssl_channel_security_connector_create(
-                 exec_ctx, pem_root_certs, host, &sc) == GRPC_SECURITY_OK);
+                 pem_root_certs, host, &sc) == GRPC_SECURITY_OK);
   grpc_arg channel_arg = grpc_security_connector_to_arg(&sc->base);
   grpc_channel_args args = {1, &channel_arg};
   c->handshake_mgr = grpc_handshake_manager_create();
-  grpc_handshakers_add(exec_ctx, HANDSHAKER_CLIENT, &args, c->handshake_mgr);
+  grpc_handshakers_add(HANDSHAKER_CLIENT, &args, c->handshake_mgr);
   grpc_handshake_manager_do_handshake(
-      exec_ctx, c->handshake_mgr, nullptr /* interested_parties */, tcp,
+      c->handshake_mgr, nullptr /* interested_parties */, tcp,
       nullptr /* channel_args */, deadline, nullptr /* acceptor */,
       on_handshake_done, c /* user_data */);
-  GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, &sc->base, "httpcli");
+  GRPC_SECURITY_CONNECTOR_UNREF(&sc->base, "httpcli");
 }
 
 const grpc_httpcli_handshaker grpc_httpcli_ssl = {"https", ssl_handshake};
diff --git a/src/core/lib/iomgr/block_annotate.h b/src/core/lib/iomgr/block_annotate.h
index 340ebcb1af..a57873aabb 100644
--- a/src/core/lib/iomgr/block_annotate.h
+++ b/src/core/lib/iomgr/block_annotate.h
@@ -31,26 +31,27 @@ void gpr_thd_end_blocking_region();
   do {                                        \
     gpr_thd_start_blocking_region();          \
   } while (0)
+#define GRPC_SCHEDULING_END_BLOCKING_REGION     \
+  do {                                          \
+    gpr_thd_end_blocking_region();              \
+    grpc_core::ExecCtx::Get()->InvalidateNow(); \
+  } while (0)
 #define GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX \
   do {                                                  \
     gpr_thd_end_blocking_region();                      \
   } while (0)
-#define GRPC_SCHEDULING_END_BLOCKING_REGION_WITH_EXEC_CTX(ec) \
-  do {                                                        \
-    gpr_thd_end_blocking_region();                            \
-    grpc_exec_ctx_invalidate_now((ec));                       \
-  } while (0)
+
 #else
 #define GRPC_SCHEDULING_START_BLOCKING_REGION \
   do {                                        \
   } while (0)
+#define GRPC_SCHEDULING_END_BLOCKING_REGION     \
+  do {                                          \
+    grpc_core::ExecCtx::Get()->InvalidateNow(); \
+  } while (0)
 #define GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX \
   do {                                                  \
   } while (0)
-#define GRPC_SCHEDULING_END_BLOCKING_REGION_WITH_EXEC_CTX(ec) \
-  do {                                                        \
-    grpc_exec_ctx_invalidate_now((ec));                       \
-  } while (0)
 #endif
 
 #endif /* GRPC_CORE_LIB_IOMGR_BLOCK_ANNOTATE_H */
diff --git a/src/core/lib/iomgr/call_combiner.cc b/src/core/lib/iomgr/call_combiner.cc
index b5910b42e4..a9f48fb3c2 100644
--- a/src/core/lib/iomgr/call_combiner.cc
+++ b/src/core/lib/iomgr/call_combiner.cc
@@ -56,8 +56,7 @@ void grpc_call_combiner_destroy(grpc_call_combiner* call_combiner) {
 #define DEBUG_FMT_ARGS
 #endif
 
-void grpc_call_combiner_start(grpc_exec_ctx* exec_ctx,
-                              grpc_call_combiner* call_combiner,
+void grpc_call_combiner_start(grpc_call_combiner* call_combiner,
                               grpc_closure* closure,
                               grpc_error* error DEBUG_ARGS,
                               const char* reason) {
@@ -75,15 +74,16 @@ void grpc_call_combiner_start(grpc_exec_ctx* exec_ctx,
     gpr_log(GPR_DEBUG, "  size: %" PRIdPTR " -> %" PRIdPTR, prev_size,
             prev_size + 1);
   }
-  GRPC_STATS_INC_CALL_COMBINER_LOCKS_SCHEDULED_ITEMS(exec_ctx);
+  GRPC_STATS_INC_CALL_COMBINER_LOCKS_SCHEDULED_ITEMS();
   if (prev_size == 0) {
-    GRPC_STATS_INC_CALL_COMBINER_LOCKS_INITIATED(exec_ctx);
+    GRPC_STATS_INC_CALL_COMBINER_LOCKS_INITIATED();
+
     GPR_TIMER_MARK("call_combiner_initiate", 0);
     if (grpc_call_combiner_trace.enabled()) {
       gpr_log(GPR_DEBUG, "  EXECUTING IMMEDIATELY");
     }
     // Queue was empty, so execute this closure immediately.
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, error);
+    GRPC_CLOSURE_SCHED(closure, error);
   } else {
     if (grpc_call_combiner_trace.enabled()) {
       gpr_log(GPR_INFO, "  QUEUING");
@@ -95,8 +95,7 @@ void grpc_call_combiner_start(grpc_exec_ctx* exec_ctx,
   GPR_TIMER_END("call_combiner_start", 0);
 }
 
-void grpc_call_combiner_stop(grpc_exec_ctx* exec_ctx,
-                             grpc_call_combiner* call_combiner DEBUG_ARGS,
+void grpc_call_combiner_stop(grpc_call_combiner* call_combiner DEBUG_ARGS,
                              const char* reason) {
   GPR_TIMER_BEGIN("call_combiner_stop", 0);
   if (grpc_call_combiner_trace.enabled()) {
@@ -131,7 +130,7 @@ void grpc_call_combiner_stop(grpc_exec_ctx* exec_ctx,
         gpr_log(GPR_DEBUG, "  EXECUTING FROM QUEUE: closure=%p error=%s",
                 closure, grpc_error_string(closure->error_data.error));
       }
-      GRPC_CLOSURE_SCHED(exec_ctx, closure, closure->error_data.error);
+      GRPC_CLOSURE_SCHED(closure, closure->error_data.error);
       break;
     }
   } else if (grpc_call_combiner_trace.enabled()) {
@@ -140,10 +139,9 @@ void grpc_call_combiner_stop(grpc_exec_ctx* exec_ctx,
   GPR_TIMER_END("call_combiner_stop", 0);
 }
 
-void grpc_call_combiner_set_notify_on_cancel(grpc_exec_ctx* exec_ctx,
-                                             grpc_call_combiner* call_combiner,
+void grpc_call_combiner_set_notify_on_cancel(grpc_call_combiner* call_combiner,
                                              grpc_closure* closure) {
-  GRPC_STATS_INC_CALL_COMBINER_SET_NOTIFY_ON_CANCEL(exec_ctx);
+  GRPC_STATS_INC_CALL_COMBINER_SET_NOTIFY_ON_CANCEL();
   while (true) {
     // Decode original state.
     gpr_atm original_state = gpr_atm_acq_load(&call_combiner->cancel_state);
@@ -157,7 +155,7 @@ void grpc_call_combiner_set_notify_on_cancel(grpc_exec_ctx* exec_ctx,
                 "for pre-existing cancellation",
                 call_combiner, closure);
       }
-      GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_REF(original_error));
+      GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_REF(original_error));
       break;
     } else {
       if (gpr_atm_full_cas(&call_combiner->cancel_state, original_state,
@@ -176,7 +174,7 @@ void grpc_call_combiner_set_notify_on_cancel(grpc_exec_ctx* exec_ctx,
                     "call_combiner=%p: scheduling old cancel callback=%p",
                     call_combiner, closure);
           }
-          GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+          GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
         }
         break;
       }
@@ -185,10 +183,9 @@ void grpc_call_combiner_set_notify_on_cancel(grpc_exec_ctx* exec_ctx,
   }
 }
 
-void grpc_call_combiner_cancel(grpc_exec_ctx* exec_ctx,
-                               grpc_call_combiner* call_combiner,
+void grpc_call_combiner_cancel(grpc_call_combiner* call_combiner,
                                grpc_error* error) {
-  GRPC_STATS_INC_CALL_COMBINER_CANCELLED(exec_ctx);
+  GRPC_STATS_INC_CALL_COMBINER_CANCELLED();
   while (true) {
     gpr_atm original_state = gpr_atm_acq_load(&call_combiner->cancel_state);
     grpc_error* original_error = decode_cancel_state_error(original_state);
@@ -205,7 +202,7 @@ void grpc_call_combiner_cancel(grpc_exec_ctx* exec_ctx,
                   "call_combiner=%p: scheduling notify_on_cancel callback=%p",
                   call_combiner, notify_on_cancel);
         }
-        GRPC_CLOSURE_SCHED(exec_ctx, notify_on_cancel, GRPC_ERROR_REF(error));
+        GRPC_CLOSURE_SCHED(notify_on_cancel, GRPC_ERROR_REF(error));
       }
       break;
     }
diff --git a/src/core/lib/iomgr/call_combiner.h b/src/core/lib/iomgr/call_combiner.h
index c07af51c91..9f7e6ce1c9 100644
--- a/src/core/lib/iomgr/call_combiner.h
+++ b/src/core/lib/iomgr/call_combiner.h
@@ -53,37 +53,29 @@ void grpc_call_combiner_init(grpc_call_combiner* call_combiner);
 void grpc_call_combiner_destroy(grpc_call_combiner* call_combiner);
 
 #ifndef NDEBUG
-#define GRPC_CALL_COMBINER_START(exec_ctx, call_combiner, closure, error,   \
-                                 reason)                                    \
-  grpc_call_combiner_start((exec_ctx), (call_combiner), (closure), (error), \
-                           __FILE__, __LINE__, (reason))
-#define GRPC_CALL_COMBINER_STOP(exec_ctx, call_combiner, reason)           \
-  grpc_call_combiner_stop((exec_ctx), (call_combiner), __FILE__, __LINE__, \
-                          (reason))
+#define GRPC_CALL_COMBINER_START(call_combiner, closure, error, reason)   \
+  grpc_call_combiner_start((call_combiner), (closure), (error), __FILE__, \
+                           __LINE__, (reason))
+#define GRPC_CALL_COMBINER_STOP(call_combiner, reason) \
+  grpc_call_combiner_stop((call_combiner), __FILE__, __LINE__, (reason))
 /// Starts processing \a closure on \a call_combiner.
-void grpc_call_combiner_start(grpc_exec_ctx* exec_ctx,
-                              grpc_call_combiner* call_combiner,
+void grpc_call_combiner_start(grpc_call_combiner* call_combiner,
                               grpc_closure* closure, grpc_error* error,
                               const char* file, int line, const char* reason);
 /// Yields the call combiner to the next closure in the queue, if any.
-void grpc_call_combiner_stop(grpc_exec_ctx* exec_ctx,
-                             grpc_call_combiner* call_combiner,
+void grpc_call_combiner_stop(grpc_call_combiner* call_combiner,
                              const char* file, int line, const char* reason);
 #else
-#define GRPC_CALL_COMBINER_START(exec_ctx, call_combiner, closure, error,   \
-                                 reason)                                    \
-  grpc_call_combiner_start((exec_ctx), (call_combiner), (closure), (error), \
-                           (reason))
-#define GRPC_CALL_COMBINER_STOP(exec_ctx, call_combiner, reason) \
-  grpc_call_combiner_stop((exec_ctx), (call_combiner), (reason))
+#define GRPC_CALL_COMBINER_START(call_combiner, closure, error, reason) \
+  grpc_call_combiner_start((call_combiner), (closure), (error), (reason))
+#define GRPC_CALL_COMBINER_STOP(call_combiner, reason) \
+  grpc_call_combiner_stop((call_combiner), (reason))
 /// Starts processing \a closure on \a call_combiner.
-void grpc_call_combiner_start(grpc_exec_ctx* exec_ctx,
-                              grpc_call_combiner* call_combiner,
+void grpc_call_combiner_start(grpc_call_combiner* call_combiner,
                               grpc_closure* closure, grpc_error* error,
                               const char* reason);
 /// Yields the call combiner to the next closure in the queue, if any.
-void grpc_call_combiner_stop(grpc_exec_ctx* exec_ctx,
-                             grpc_call_combiner* call_combiner,
+void grpc_call_combiner_stop(grpc_call_combiner* call_combiner,
                              const char* reason);
 #endif
 
@@ -109,13 +101,11 @@ void grpc_call_combiner_stop(grpc_exec_ctx* exec_ctx,
 /// cancellation; this effectively unregisters the previously set closure.
 /// However, most filters will not need to explicitly unregister their
 /// callbacks, as this is done automatically when the call is destroyed.
-void grpc_call_combiner_set_notify_on_cancel(grpc_exec_ctx* exec_ctx,
-                                             grpc_call_combiner* call_combiner,
+void grpc_call_combiner_set_notify_on_cancel(grpc_call_combiner* call_combiner,
                                              grpc_closure* closure);
 
 /// Indicates that the call has been cancelled.
-void grpc_call_combiner_cancel(grpc_exec_ctx* exec_ctx,
-                               grpc_call_combiner* call_combiner,
+void grpc_call_combiner_cancel(grpc_call_combiner* call_combiner,
                                grpc_error* error);
 
 #endif /* GRPC_CORE_LIB_IOMGR_CALL_COMBINER_H */
diff --git a/src/core/lib/iomgr/closure.h b/src/core/lib/iomgr/closure.h
index 46793dd2c5..88af76006a 100644
--- a/src/core/lib/iomgr/closure.h
+++ b/src/core/lib/iomgr/closure.h
@@ -47,18 +47,15 @@ typedef struct grpc_closure_list {
  *              describing what went wrong.
  *              Error contract: it is not the cb's job to unref this error;
  *              the closure scheduler will do that after the cb returns */
-typedef void (*grpc_iomgr_cb_func)(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error);
+typedef void (*grpc_iomgr_cb_func)(void* arg, grpc_error* error);
 
 typedef struct grpc_closure_scheduler grpc_closure_scheduler;
 
 typedef struct grpc_closure_scheduler_vtable {
   /* NOTE: for all these functions, closure->scheduler == the scheduler that was
            used to find this vtable */
-  void (*run)(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-              grpc_error* error);
-  void (*sched)(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                grpc_error* error);
+  void (*run)(grpc_closure* closure, grpc_error* error);
+  void (*sched)(grpc_closure* closure, grpc_error* error);
   const char* name;
 } grpc_closure_scheduler_vtable;
 
@@ -146,13 +143,12 @@ typedef struct {
   grpc_closure wrapper;
 } wrapped_closure;
 
-inline void closure_wrapper(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+inline void closure_wrapper(void* arg, grpc_error* error) {
   wrapped_closure* wc = (wrapped_closure*)arg;
   grpc_iomgr_cb_func cb = wc->cb;
   void* cb_arg = wc->cb_arg;
   gpr_free(wc);
-  cb(exec_ctx, cb_arg, error);
+  cb(cb_arg, error);
 }
 
 }  // namespace closure_impl
@@ -247,12 +243,10 @@ inline bool grpc_closure_list_empty(grpc_closure_list closure_list) {
 }
 
 #ifndef NDEBUG
-inline void grpc_closure_run(const char* file, int line,
-                             grpc_exec_ctx* exec_ctx, grpc_closure* c,
+inline void grpc_closure_run(const char* file, int line, grpc_closure* c,
                              grpc_error* error) {
 #else
-inline void grpc_closure_run(grpc_exec_ctx* exec_ctx, grpc_closure* c,
-                             grpc_error* error) {
+inline void grpc_closure_run(grpc_closure* c, grpc_error* error) {
 #endif
   GPR_TIMER_BEGIN("grpc_closure_run", 0);
   if (c != nullptr) {
@@ -262,7 +256,7 @@ inline void grpc_closure_run(grpc_exec_ctx* exec_ctx, grpc_closure* c,
     c->run = true;
 #endif
     assert(c->cb);
-    c->scheduler->vtable->run(exec_ctx, c, error);
+    c->scheduler->vtable->run(c, error);
   } else {
     GRPC_ERROR_UNREF(error);
   }
@@ -273,20 +267,17 @@ inline void grpc_closure_run(grpc_exec_ctx* exec_ctx, grpc_closure* c,
  *  Note that calling this at the end of a closure callback function itself is
  *  by definition safe. */
 #ifndef NDEBUG
-#define GRPC_CLOSURE_RUN(exec_ctx, closure, error) \
-  grpc_closure_run(__FILE__, __LINE__, exec_ctx, closure, error)
+#define GRPC_CLOSURE_RUN(closure, error) \
+  grpc_closure_run(__FILE__, __LINE__, closure, error)
 #else
-#define GRPC_CLOSURE_RUN(exec_ctx, closure, error) \
-  grpc_closure_run(exec_ctx, closure, error)
+#define GRPC_CLOSURE_RUN(closure, error) grpc_closure_run(closure, error)
 #endif
 
 #ifndef NDEBUG
-inline void grpc_closure_sched(const char* file, int line,
-                               grpc_exec_ctx* exec_ctx, grpc_closure* c,
+inline void grpc_closure_sched(const char* file, int line, grpc_closure* c,
                                grpc_error* error) {
 #else
-inline void grpc_closure_sched(grpc_exec_ctx* exec_ctx, grpc_closure* c,
-                               grpc_error* error) {
+inline void grpc_closure_sched(grpc_closure* c, grpc_error* error) {
 #endif
   GPR_TIMER_BEGIN("grpc_closure_sched", 0);
   if (c != nullptr) {
@@ -305,7 +296,7 @@ inline void grpc_closure_sched(grpc_exec_ctx* exec_ctx, grpc_closure* c,
     c->run = false;
 #endif
     assert(c->cb);
-    c->scheduler->vtable->sched(exec_ctx, c, error);
+    c->scheduler->vtable->sched(c, error);
   } else {
     GRPC_ERROR_UNREF(error);
   }
@@ -314,20 +305,17 @@ inline void grpc_closure_sched(grpc_exec_ctx* exec_ctx, grpc_closure* c,
 
 /** Schedule a closure to be run. Does not need to be run from a safe point. */
 #ifndef NDEBUG
-#define GRPC_CLOSURE_SCHED(exec_ctx, closure, error) \
-  grpc_closure_sched(__FILE__, __LINE__, exec_ctx, closure, error)
+#define GRPC_CLOSURE_SCHED(closure, error) \
+  grpc_closure_sched(__FILE__, __LINE__, closure, error)
 #else
-#define GRPC_CLOSURE_SCHED(exec_ctx, closure, error) \
-  grpc_closure_sched(exec_ctx, closure, error)
+#define GRPC_CLOSURE_SCHED(closure, error) grpc_closure_sched(closure, error)
 #endif
 
 #ifndef NDEBUG
 inline void grpc_closure_list_sched(const char* file, int line,
-                                    grpc_exec_ctx* exec_ctx,
                                     grpc_closure_list* list) {
 #else
-inline void grpc_closure_list_sched(grpc_exec_ctx* exec_ctx,
-                                    grpc_closure_list* list) {
+inline void grpc_closure_list_sched(grpc_closure_list* list) {
 #endif
   grpc_closure* c = list->head;
   while (c != nullptr) {
@@ -347,7 +335,7 @@ inline void grpc_closure_list_sched(grpc_exec_ctx* exec_ctx,
     c->run = false;
 #endif
     assert(c->cb);
-    c->scheduler->vtable->sched(exec_ctx, c, c->error_data.error);
+    c->scheduler->vtable->sched(c, c->error_data.error);
     c = next;
   }
   list->head = list->tail = nullptr;
@@ -356,11 +344,11 @@ inline void grpc_closure_list_sched(grpc_exec_ctx* exec_ctx,
 /** Schedule all closures in a list to be run. Does not need to be run from a
  * safe point. */
 #ifndef NDEBUG
-#define GRPC_CLOSURE_LIST_SCHED(exec_ctx, closure_list) \
-  grpc_closure_list_sched(__FILE__, __LINE__, exec_ctx, closure_list)
+#define GRPC_CLOSURE_LIST_SCHED(closure_list) \
+  grpc_closure_list_sched(__FILE__, __LINE__, closure_list)
 #else
-#define GRPC_CLOSURE_LIST_SCHED(exec_ctx, closure_list) \
-  grpc_closure_list_sched(exec_ctx, closure_list)
+#define GRPC_CLOSURE_LIST_SCHED(closure_list) \
+  grpc_closure_list_sched(closure_list)
 #endif
 
 #endif /* GRPC_CORE_LIB_IOMGR_CLOSURE_H */
diff --git a/src/core/lib/iomgr/combiner.cc b/src/core/lib/iomgr/combiner.cc
index 15c009dd77..e4d7a6abd8 100644
--- a/src/core/lib/iomgr/combiner.cc
+++ b/src/core/lib/iomgr/combiner.cc
@@ -61,17 +61,15 @@ struct grpc_combiner {
   gpr_refcount refs;
 };
 
-static void combiner_exec(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                          grpc_error* error);
-static void combiner_finally_exec(grpc_exec_ctx* exec_ctx,
-                                  grpc_closure* closure, grpc_error* error);
+static void combiner_exec(grpc_closure* closure, grpc_error* error);
+static void combiner_finally_exec(grpc_closure* closure, grpc_error* error);
 
 static const grpc_closure_scheduler_vtable scheduler = {
     combiner_exec, combiner_exec, "combiner:immediately"};
 static const grpc_closure_scheduler_vtable finally_scheduler = {
     combiner_finally_exec, combiner_finally_exec, "combiner:finally"};
 
-static void offload(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error);
+static void offload(void* arg, grpc_error* error);
 
 grpc_combiner* grpc_combiner_create(void) {
   grpc_combiner* lock = (grpc_combiner*)gpr_zalloc(sizeof(*lock));
@@ -87,19 +85,19 @@ grpc_combiner* grpc_combiner_create(void) {
   return lock;
 }
 
-static void really_destroy(grpc_exec_ctx* exec_ctx, grpc_combiner* lock) {
+static void really_destroy(grpc_combiner* lock) {
   GRPC_COMBINER_TRACE(gpr_log(GPR_DEBUG, "C:%p really_destroy", lock));
   GPR_ASSERT(gpr_atm_no_barrier_load(&lock->state) == 0);
   gpr_mpscq_destroy(&lock->queue);
   gpr_free(lock);
 }
 
-static void start_destroy(grpc_exec_ctx* exec_ctx, grpc_combiner* lock) {
+static void start_destroy(grpc_combiner* lock) {
   gpr_atm old_state = gpr_atm_full_fetch_add(&lock->state, -STATE_UNORPHANED);
   GRPC_COMBINER_TRACE(gpr_log(
       GPR_DEBUG, "C:%p really_destroy old_state=%" PRIdPTR, lock, old_state));
   if (old_state == 1) {
-    really_destroy(exec_ctx, lock);
+    really_destroy(lock);
   }
 }
 
@@ -115,11 +113,10 @@ static void start_destroy(grpc_exec_ctx* exec_ctx, grpc_combiner* lock) {
 #define GRPC_COMBINER_DEBUG_SPAM(op, delta)
 #endif
 
-void grpc_combiner_unref(grpc_exec_ctx* exec_ctx,
-                         grpc_combiner* lock GRPC_COMBINER_DEBUG_ARGS) {
+void grpc_combiner_unref(grpc_combiner* lock GRPC_COMBINER_DEBUG_ARGS) {
   GRPC_COMBINER_DEBUG_SPAM("UNREF", -1);
   if (gpr_unref(&lock->refs)) {
-    start_destroy(exec_ctx, lock);
+    start_destroy(lock);
   }
 }
 
@@ -129,23 +126,25 @@ grpc_combiner* grpc_combiner_ref(grpc_combiner* lock GRPC_COMBINER_DEBUG_ARGS) {
   return lock;
 }
 
-static void push_last_on_exec_ctx(grpc_exec_ctx* exec_ctx,
-                                  grpc_combiner* lock) {
+static void push_last_on_exec_ctx(grpc_combiner* lock) {
   lock->next_combiner_on_this_exec_ctx = nullptr;
-  if (exec_ctx->active_combiner == nullptr) {
-    exec_ctx->active_combiner = exec_ctx->last_combiner = lock;
+  if (grpc_core::ExecCtx::Get()->combiner_data()->active_combiner == nullptr) {
+    grpc_core::ExecCtx::Get()->combiner_data()->active_combiner =
+        grpc_core::ExecCtx::Get()->combiner_data()->last_combiner = lock;
   } else {
-    exec_ctx->last_combiner->next_combiner_on_this_exec_ctx = lock;
-    exec_ctx->last_combiner = lock;
+    grpc_core::ExecCtx::Get()
+        ->combiner_data()
+        ->last_combiner->next_combiner_on_this_exec_ctx = lock;
+    grpc_core::ExecCtx::Get()->combiner_data()->last_combiner = lock;
   }
 }
 
-static void push_first_on_exec_ctx(grpc_exec_ctx* exec_ctx,
-                                   grpc_combiner* lock) {
-  lock->next_combiner_on_this_exec_ctx = exec_ctx->active_combiner;
-  exec_ctx->active_combiner = lock;
+static void push_first_on_exec_ctx(grpc_combiner* lock) {
+  lock->next_combiner_on_this_exec_ctx =
+      grpc_core::ExecCtx::Get()->combiner_data()->active_combiner;
+  grpc_core::ExecCtx::Get()->combiner_data()->active_combiner = lock;
   if (lock->next_combiner_on_this_exec_ctx == nullptr) {
-    exec_ctx->last_combiner = lock;
+    grpc_core::ExecCtx::Get()->combiner_data()->last_combiner = lock;
   }
 }
 
@@ -153,9 +152,8 @@ static void push_first_on_exec_ctx(grpc_exec_ctx* exec_ctx,
   ((grpc_combiner*)(((char*)((closure)->scheduler)) -            \
                     offsetof(grpc_combiner, scheduler_name)))
 
-static void combiner_exec(grpc_exec_ctx* exec_ctx, grpc_closure* cl,
-                          grpc_error* error) {
-  GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_ITEMS(exec_ctx);
+static void combiner_exec(grpc_closure* cl, grpc_error* error) {
+  GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_ITEMS();
   GPR_TIMER_BEGIN("combiner.execute", 0);
   grpc_combiner* lock = COMBINER_FROM_CLOSURE_SCHEDULER(cl, scheduler);
   gpr_atm last = gpr_atm_full_fetch_add(&lock->state, STATE_ELEM_COUNT_LOW_BIT);
@@ -163,19 +161,19 @@ static void combiner_exec(grpc_exec_ctx* exec_ctx, grpc_closure* cl,
                               "C:%p grpc_combiner_execute c=%p last=%" PRIdPTR,
                               lock, cl, last));
   if (last == 1) {
-    GRPC_STATS_INC_COMBINER_LOCKS_INITIATED(exec_ctx);
+    GRPC_STATS_INC_COMBINER_LOCKS_INITIATED();
     GPR_TIMER_MARK("combiner.initiated", 0);
     gpr_atm_no_barrier_store(&lock->initiating_exec_ctx_or_null,
-                             (gpr_atm)exec_ctx);
+                             (gpr_atm)grpc_core::ExecCtx::Get());
     // first element on this list: add it to the list of combiner locks
     // executing within this exec_ctx
-    push_last_on_exec_ctx(exec_ctx, lock);
+    push_last_on_exec_ctx(lock);
   } else {
     // there may be a race with setting here: if that happens, we may delay
     // offload for one or two actions, and that's fine
     gpr_atm initiator =
         gpr_atm_no_barrier_load(&lock->initiating_exec_ctx_or_null);
-    if (initiator != 0 && initiator != (gpr_atm)exec_ctx) {
+    if (initiator != 0 && initiator != (gpr_atm)grpc_core::ExecCtx::Get()) {
       gpr_atm_no_barrier_store(&lock->initiating_exec_ctx_or_null, 0);
     }
   }
@@ -186,29 +184,32 @@ static void combiner_exec(grpc_exec_ctx* exec_ctx, grpc_closure* cl,
   GPR_TIMER_END("combiner.execute", 0);
 }
 
-static void move_next(grpc_exec_ctx* exec_ctx) {
-  exec_ctx->active_combiner =
-      exec_ctx->active_combiner->next_combiner_on_this_exec_ctx;
-  if (exec_ctx->active_combiner == nullptr) {
-    exec_ctx->last_combiner = nullptr;
+static void move_next() {
+  grpc_core::ExecCtx::Get()->combiner_data()->active_combiner =
+      grpc_core::ExecCtx::Get()
+          ->combiner_data()
+          ->active_combiner->next_combiner_on_this_exec_ctx;
+  if (grpc_core::ExecCtx::Get()->combiner_data()->active_combiner == nullptr) {
+    grpc_core::ExecCtx::Get()->combiner_data()->last_combiner = nullptr;
   }
 }
 
-static void offload(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void offload(void* arg, grpc_error* error) {
   grpc_combiner* lock = (grpc_combiner*)arg;
-  push_last_on_exec_ctx(exec_ctx, lock);
+  push_last_on_exec_ctx(lock);
 }
 
-static void queue_offload(grpc_exec_ctx* exec_ctx, grpc_combiner* lock) {
-  GRPC_STATS_INC_COMBINER_LOCKS_OFFLOADED(exec_ctx);
-  move_next(exec_ctx);
+static void queue_offload(grpc_combiner* lock) {
+  GRPC_STATS_INC_COMBINER_LOCKS_OFFLOADED();
+  move_next();
   GRPC_COMBINER_TRACE(gpr_log(GPR_DEBUG, "C:%p queue_offload", lock));
-  GRPC_CLOSURE_SCHED(exec_ctx, &lock->offload, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(&lock->offload, GRPC_ERROR_NONE);
 }
 
-bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx* exec_ctx) {
+bool grpc_combiner_continue_exec_ctx() {
   GPR_TIMER_BEGIN("combiner.continue_exec_ctx", 0);
-  grpc_combiner* lock = exec_ctx->active_combiner;
+  grpc_combiner* lock =
+      grpc_core::ExecCtx::Get()->combiner_data()->active_combiner;
   if (lock == nullptr) {
     GPR_TIMER_END("combiner.continue_exec_ctx", 0);
     return false;
@@ -223,15 +224,15 @@ bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx* exec_ctx) {
                               "exec_ctx_ready_to_finish=%d "
                               "time_to_execute_final_list=%d",
                               lock, contended,
-                              grpc_exec_ctx_ready_to_finish(exec_ctx),
+                              grpc_core::ExecCtx::Get()->IsReadyToFinish(),
                               lock->time_to_execute_final_list));
 
-  if (contended && grpc_exec_ctx_ready_to_finish(exec_ctx) &&
+  if (contended && grpc_core::ExecCtx::Get()->IsReadyToFinish() &&
       grpc_executor_is_threaded()) {
     GPR_TIMER_MARK("offload_from_finished_exec_ctx", 0);
     // this execution context wants to move on: schedule remaining work to be
     // picked up on the executor
-    queue_offload(exec_ctx, lock);
+    queue_offload(lock);
     GPR_TIMER_END("combiner.continue_exec_ctx", 0);
     return true;
   }
@@ -247,7 +248,7 @@ bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx* exec_ctx) {
       // queue is in an inconsistent state: use this as a cue that we should
       // go off and do something else for a while (and come back later)
       GPR_TIMER_MARK("delay_busy", 0);
-      queue_offload(exec_ctx, lock);
+      queue_offload(lock);
       GPR_TIMER_END("combiner.continue_exec_ctx", 0);
       return true;
     }
@@ -257,7 +258,7 @@ bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx* exec_ctx) {
 #ifndef NDEBUG
     cl->scheduled = false;
 #endif
-    cl->cb(exec_ctx, cl->cb_arg, cl_err);
+    cl->cb(cl->cb_arg, cl_err);
     GRPC_ERROR_UNREF(cl_err);
     GPR_TIMER_END("combiner.exec1", 0);
   } else {
@@ -274,7 +275,7 @@ bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx* exec_ctx) {
 #ifndef NDEBUG
       c->scheduled = false;
 #endif
-      c->cb(exec_ctx, c->cb_arg, error);
+      c->cb(c->cb_arg, error);
       GRPC_ERROR_UNREF(error);
       c = next;
       GPR_TIMER_END("combiner.exec_1final", 0);
@@ -282,7 +283,7 @@ bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx* exec_ctx) {
   }
 
   GPR_TIMER_MARK("unref", 0);
-  move_next(exec_ctx);
+  move_next();
   lock->time_to_execute_final_list = false;
   gpr_atm old_state =
       gpr_atm_full_fetch_add(&lock->state, -STATE_ELEM_COUNT_LOW_BIT);
@@ -311,7 +312,7 @@ bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx* exec_ctx) {
       return true;
     case OLD_STATE_WAS(true, 1):
       // and one count, one orphaned --> unlocked and orphaned
-      really_destroy(exec_ctx, lock);
+      really_destroy(lock);
       GPR_TIMER_END("combiner.continue_exec_ctx", 0);
       return true;
     case OLD_STATE_WAS(false, 0):
@@ -321,27 +322,24 @@ bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx* exec_ctx) {
       GPR_TIMER_END("combiner.continue_exec_ctx", 0);
       GPR_UNREACHABLE_CODE(return true);
   }
-  push_first_on_exec_ctx(exec_ctx, lock);
+  push_first_on_exec_ctx(lock);
   GPR_TIMER_END("combiner.continue_exec_ctx", 0);
   return true;
 }
 
-static void enqueue_finally(grpc_exec_ctx* exec_ctx, void* closure,
-                            grpc_error* error);
+static void enqueue_finally(void* closure, grpc_error* error);
 
-static void combiner_finally_exec(grpc_exec_ctx* exec_ctx,
-                                  grpc_closure* closure, grpc_error* error) {
-  GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS(exec_ctx);
+static void combiner_finally_exec(grpc_closure* closure, grpc_error* error) {
+  GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS();
   grpc_combiner* lock =
       COMBINER_FROM_CLOSURE_SCHEDULER(closure, finally_scheduler);
-  GRPC_COMBINER_TRACE(gpr_log(GPR_DEBUG,
-                              "C:%p grpc_combiner_execute_finally c=%p; ac=%p",
-                              lock, closure, exec_ctx->active_combiner));
+  GRPC_COMBINER_TRACE(gpr_log(
+      GPR_DEBUG, "C:%p grpc_combiner_execute_finally c=%p; ac=%p", lock,
+      closure, grpc_core::ExecCtx::Get()->combiner_data()->active_combiner));
   GPR_TIMER_BEGIN("combiner.execute_finally", 0);
-  if (exec_ctx->active_combiner != lock) {
+  if (grpc_core::ExecCtx::Get()->combiner_data()->active_combiner != lock) {
     GPR_TIMER_MARK("slowpath", 0);
-    GRPC_CLOSURE_SCHED(exec_ctx,
-                       GRPC_CLOSURE_CREATE(enqueue_finally, closure,
+    GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(enqueue_finally, closure,
                                            grpc_combiner_scheduler(lock)),
                        error);
     GPR_TIMER_END("combiner.execute_finally", 0);
@@ -355,10 +353,8 @@ static void combiner_finally_exec(grpc_exec_ctx* exec_ctx,
   GPR_TIMER_END("combiner.execute_finally", 0);
 }
 
-static void enqueue_finally(grpc_exec_ctx* exec_ctx, void* closure,
-                            grpc_error* error) {
-  combiner_finally_exec(exec_ctx, (grpc_closure*)closure,
-                        GRPC_ERROR_REF(error));
+static void enqueue_finally(void* closure, grpc_error* error) {
+  combiner_finally_exec((grpc_closure*)closure, GRPC_ERROR_REF(error));
 }
 
 grpc_closure_scheduler* grpc_combiner_scheduler(grpc_combiner* combiner) {
diff --git a/src/core/lib/iomgr/combiner.h b/src/core/lib/iomgr/combiner.h
index 0c05511331..46b9ac58be 100644
--- a/src/core/lib/iomgr/combiner.h
+++ b/src/core/lib/iomgr/combiner.h
@@ -40,26 +40,24 @@ grpc_combiner* grpc_combiner_create(void);
   , const char *file, int line, const char *reason
 #define GRPC_COMBINER_REF(combiner, reason) \
   grpc_combiner_ref((combiner), __FILE__, __LINE__, (reason))
-#define GRPC_COMBINER_UNREF(exec_ctx, combiner, reason) \
-  grpc_combiner_unref((exec_ctx), (combiner), __FILE__, __LINE__, (reason))
+#define GRPC_COMBINER_UNREF(combiner, reason) \
+  grpc_combiner_unref((combiner), __FILE__, __LINE__, (reason))
 #else
 #define GRPC_COMBINER_DEBUG_ARGS
 #define GRPC_COMBINER_REF(combiner, reason) grpc_combiner_ref((combiner))
-#define GRPC_COMBINER_UNREF(exec_ctx, combiner, reason) \
-  grpc_combiner_unref((exec_ctx), (combiner))
+#define GRPC_COMBINER_UNREF(combiner, reason) grpc_combiner_unref((combiner))
 #endif
 
 // Ref/unref the lock, for when we're sharing the lock ownership
 // Prefer to use the macros above
 grpc_combiner* grpc_combiner_ref(grpc_combiner* lock GRPC_COMBINER_DEBUG_ARGS);
-void grpc_combiner_unref(grpc_exec_ctx* exec_ctx,
-                         grpc_combiner* lock GRPC_COMBINER_DEBUG_ARGS);
+void grpc_combiner_unref(grpc_combiner* lock GRPC_COMBINER_DEBUG_ARGS);
 // Fetch a scheduler to schedule closures against
 grpc_closure_scheduler* grpc_combiner_scheduler(grpc_combiner* lock);
 // Scheduler to execute \a action within the lock just prior to unlocking.
 grpc_closure_scheduler* grpc_combiner_finally_scheduler(grpc_combiner* lock);
 
-bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx* exec_ctx);
+bool grpc_combiner_continue_exec_ctx();
 
 extern grpc_core::TraceFlag grpc_combiner_trace;
 
diff --git a/src/core/lib/iomgr/endpoint.cc b/src/core/lib/iomgr/endpoint.cc
index 5eab1d3158..9d4b102822 100644
--- a/src/core/lib/iomgr/endpoint.cc
+++ b/src/core/lib/iomgr/endpoint.cc
@@ -18,41 +18,35 @@
 
 #include "src/core/lib/iomgr/endpoint.h"
 
-void grpc_endpoint_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                        grpc_slice_buffer* slices, grpc_closure* cb) {
-  ep->vtable->read(exec_ctx, ep, slices, cb);
+void grpc_endpoint_read(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                        grpc_closure* cb) {
+  ep->vtable->read(ep, slices, cb);
 }
 
-void grpc_endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                         grpc_slice_buffer* slices, grpc_closure* cb) {
-  ep->vtable->write(exec_ctx, ep, slices, cb);
+void grpc_endpoint_write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                         grpc_closure* cb) {
+  ep->vtable->write(ep, slices, cb);
 }
 
-void grpc_endpoint_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                  grpc_pollset* pollset) {
-  ep->vtable->add_to_pollset(exec_ctx, ep, pollset);
+void grpc_endpoint_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {
+  ep->vtable->add_to_pollset(ep, pollset);
 }
 
-void grpc_endpoint_add_to_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_endpoint* ep,
+void grpc_endpoint_add_to_pollset_set(grpc_endpoint* ep,
                                       grpc_pollset_set* pollset_set) {
-  ep->vtable->add_to_pollset_set(exec_ctx, ep, pollset_set);
+  ep->vtable->add_to_pollset_set(ep, pollset_set);
 }
 
-void grpc_endpoint_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                           grpc_endpoint* ep,
+void grpc_endpoint_delete_from_pollset_set(grpc_endpoint* ep,
                                            grpc_pollset_set* pollset_set) {
-  ep->vtable->delete_from_pollset_set(exec_ctx, ep, pollset_set);
+  ep->vtable->delete_from_pollset_set(ep, pollset_set);
 }
 
-void grpc_endpoint_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                            grpc_error* why) {
-  ep->vtable->shutdown(exec_ctx, ep, why);
+void grpc_endpoint_shutdown(grpc_endpoint* ep, grpc_error* why) {
+  ep->vtable->shutdown(ep, why);
 }
 
-void grpc_endpoint_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
-  ep->vtable->destroy(exec_ctx, ep);
-}
+void grpc_endpoint_destroy(grpc_endpoint* ep) { ep->vtable->destroy(ep); }
 
 char* grpc_endpoint_get_peer(grpc_endpoint* ep) {
   return ep->vtable->get_peer(ep);
diff --git a/src/core/lib/iomgr/endpoint.h b/src/core/lib/iomgr/endpoint.h
index 6ab0a6591c..cd53099334 100644
--- a/src/core/lib/iomgr/endpoint.h
+++ b/src/core/lib/iomgr/endpoint.h
@@ -33,18 +33,13 @@ typedef struct grpc_endpoint grpc_endpoint;
 typedef struct grpc_endpoint_vtable grpc_endpoint_vtable;
 
 struct grpc_endpoint_vtable {
-  void (*read)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-               grpc_slice_buffer* slices, grpc_closure* cb);
-  void (*write)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                grpc_slice_buffer* slices, grpc_closure* cb);
-  void (*add_to_pollset)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                         grpc_pollset* pollset);
-  void (*add_to_pollset_set)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                             grpc_pollset_set* pollset);
-  void (*delete_from_pollset_set)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                  grpc_pollset_set* pollset);
-  void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep, grpc_error* why);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep);
+  void (*read)(grpc_endpoint* ep, grpc_slice_buffer* slices, grpc_closure* cb);
+  void (*write)(grpc_endpoint* ep, grpc_slice_buffer* slices, grpc_closure* cb);
+  void (*add_to_pollset)(grpc_endpoint* ep, grpc_pollset* pollset);
+  void (*add_to_pollset_set)(grpc_endpoint* ep, grpc_pollset_set* pollset);
+  void (*delete_from_pollset_set)(grpc_endpoint* ep, grpc_pollset_set* pollset);
+  void (*shutdown)(grpc_endpoint* ep, grpc_error* why);
+  void (*destroy)(grpc_endpoint* ep);
   grpc_resource_user* (*get_resource_user)(grpc_endpoint* ep);
   char* (*get_peer)(grpc_endpoint* ep);
   int (*get_fd)(grpc_endpoint* ep);
@@ -55,8 +50,8 @@ struct grpc_endpoint_vtable {
    indicates the endpoint is closed.
    Valid slices may be placed into \a slices even when the callback is
    invoked with error != GRPC_ERROR_NONE. */
-void grpc_endpoint_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                        grpc_slice_buffer* slices, grpc_closure* cb);
+void grpc_endpoint_read(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                        grpc_closure* cb);
 
 char* grpc_endpoint_get_peer(grpc_endpoint* ep);
 
@@ -74,26 +69,22 @@ int grpc_endpoint_get_fd(grpc_endpoint* ep);
    No guarantee is made to the content of slices after a write EXCEPT that
    it is a valid slice buffer.
    */
-void grpc_endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                         grpc_slice_buffer* slices, grpc_closure* cb);
+void grpc_endpoint_write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                         grpc_closure* cb);
 
 /* Causes any pending and future read/write callbacks to run immediately with
    success==0 */
-void grpc_endpoint_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                            grpc_error* why);
-void grpc_endpoint_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep);
+void grpc_endpoint_shutdown(grpc_endpoint* ep, grpc_error* why);
+void grpc_endpoint_destroy(grpc_endpoint* ep);
 
 /* Add an endpoint to a pollset or pollset_set, so that when the pollset is
    polled, events from this endpoint are considered */
-void grpc_endpoint_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                  grpc_pollset* pollset);
-void grpc_endpoint_add_to_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_endpoint* ep,
+void grpc_endpoint_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset);
+void grpc_endpoint_add_to_pollset_set(grpc_endpoint* ep,
                                       grpc_pollset_set* pollset_set);
 
 /* Delete an endpoint from a pollset_set */
-void grpc_endpoint_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                           grpc_endpoint* ep,
+void grpc_endpoint_delete_from_pollset_set(grpc_endpoint* ep,
                                            grpc_pollset_set* pollset_set);
 
 grpc_resource_user* grpc_endpoint_get_resource_user(grpc_endpoint* endpoint);
diff --git a/src/core/lib/iomgr/endpoint_pair_posix.cc b/src/core/lib/iomgr/endpoint_pair_posix.cc
index f5f59f9917..0b4aefd1b7 100644
--- a/src/core/lib/iomgr/endpoint_pair_posix.cc
+++ b/src/core/lib/iomgr/endpoint_pair_posix.cc
@@ -54,18 +54,17 @@ grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(const char* name,
   char* final_name;
   create_sockets(sv);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_asprintf(&final_name, "%s:client", name);
-  p.client = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], final_name), args,
+  p.client = grpc_tcp_create(grpc_fd_create(sv[1], final_name), args,
                              "socketpair-server");
   gpr_free(final_name);
   gpr_asprintf(&final_name, "%s:server", name);
-  p.server = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[0], final_name), args,
+  p.server = grpc_tcp_create(grpc_fd_create(sv[0], final_name), args,
                              "socketpair-client");
   gpr_free(final_name);
 
-  grpc_exec_ctx_finish(&exec_ctx);
   return p;
 }
 
diff --git a/src/core/lib/iomgr/endpoint_pair_windows.cc b/src/core/lib/iomgr/endpoint_pair_windows.cc
index afa995a1c7..cc07ac0708 100644
--- a/src/core/lib/iomgr/endpoint_pair_windows.cc
+++ b/src/core/lib/iomgr/endpoint_pair_windows.cc
@@ -72,14 +72,12 @@ grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(
   SOCKET sv[2];
   grpc_endpoint_pair p;
   create_sockets(sv);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  p.client = grpc_tcp_create(&exec_ctx,
-                             grpc_winsocket_create(sv[1], "endpoint:client"),
+  grpc_core::ExecCtx exec_ctx;
+  p.client = grpc_tcp_create(grpc_winsocket_create(sv[1], "endpoint:client"),
                              channel_args, "endpoint:server");
-  p.server = grpc_tcp_create(&exec_ctx,
-                             grpc_winsocket_create(sv[0], "endpoint:server"),
+  p.server = grpc_tcp_create(grpc_winsocket_create(sv[0], "endpoint:server"),
                              channel_args, "endpoint:client");
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return p;
 }
 
diff --git a/src/core/lib/iomgr/error.cc b/src/core/lib/iomgr/error.cc
index e6d640c106..42cd7c455d 100644
--- a/src/core/lib/iomgr/error.cc
+++ b/src/core/lib/iomgr/error.cc
@@ -156,11 +156,7 @@ static void unref_errs(grpc_error* err) {
   }
 }
 
-static void unref_slice(grpc_slice slice) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_unref_internal(&exec_ctx, slice);
-  grpc_exec_ctx_finish(&exec_ctx);
-}
+static void unref_slice(grpc_slice slice) { grpc_slice_unref_internal(slice); }
 
 static void unref_strs(grpc_error* err) {
   for (size_t which = 0; which < GRPC_ERROR_STR_MAX; ++which) {
diff --git a/src/core/lib/iomgr/ev_epoll1_linux.cc b/src/core/lib/iomgr/ev_epoll1_linux.cc
index 0dda1d924c..ae9d47ece5 100644
--- a/src/core/lib/iomgr/ev_epoll1_linux.cc
+++ b/src/core/lib/iomgr/ev_epoll1_linux.cc
@@ -299,31 +299,29 @@ static int fd_wrapped_fd(grpc_fd* fd) { return fd->fd; }
 /* if 'releasing_fd' is true, it means that we are going to detach the internal
  * fd from grpc_fd structure (i.e which means we should not be calling
  * shutdown() syscall on that fd) */
-static void fd_shutdown_internal(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                                 grpc_error* why, bool releasing_fd) {
-  if (fd->read_closure->SetShutdown(exec_ctx, GRPC_ERROR_REF(why))) {
+static void fd_shutdown_internal(grpc_fd* fd, grpc_error* why,
+                                 bool releasing_fd) {
+  if (fd->read_closure->SetShutdown(GRPC_ERROR_REF(why))) {
     if (!releasing_fd) {
       shutdown(fd->fd, SHUT_RDWR);
     }
-    fd->write_closure->SetShutdown(exec_ctx, GRPC_ERROR_REF(why));
+    fd->write_closure->SetShutdown(GRPC_ERROR_REF(why));
   }
   GRPC_ERROR_UNREF(why);
 }
 
 /* Might be called multiple times */
-static void fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why) {
-  fd_shutdown_internal(exec_ctx, fd, why, false);
+static void fd_shutdown(grpc_fd* fd, grpc_error* why) {
+  fd_shutdown_internal(fd, why, false);
 }
 
-static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                      grpc_closure* on_done, int* release_fd,
+static void fd_orphan(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
                       bool already_closed, const char* reason) {
   grpc_error* error = GRPC_ERROR_NONE;
   bool is_release_fd = (release_fd != nullptr);
 
   if (!fd->read_closure->IsShutdown()) {
-    fd_shutdown_internal(exec_ctx, fd,
-                         GRPC_ERROR_CREATE_FROM_COPIED_STRING(reason),
+    fd_shutdown_internal(fd, GRPC_ERROR_CREATE_FROM_COPIED_STRING(reason),
                          is_release_fd);
   }
 
@@ -335,7 +333,7 @@ static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
     close(fd->fd);
   }
 
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_REF(error));
 
   grpc_iomgr_unregister_object(&fd->iomgr_object);
   fd->read_closure->DestroyEvent();
@@ -347,8 +345,7 @@ static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
   gpr_mu_unlock(&fd_freelist_mu);
 }
 
-static grpc_pollset* fd_get_read_notifier_pollset(grpc_exec_ctx* exec_ctx,
-                                                  grpc_fd* fd) {
+static grpc_pollset* fd_get_read_notifier_pollset(grpc_fd* fd) {
   gpr_atm notifier = gpr_atm_acq_load(&fd->read_notifier_pollset);
   return (grpc_pollset*)notifier;
 }
@@ -357,26 +354,21 @@ static bool fd_is_shutdown(grpc_fd* fd) {
   return fd->read_closure->IsShutdown();
 }
 
-static void fd_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                              grpc_closure* closure) {
-  fd->read_closure->NotifyOn(exec_ctx, closure);
+static void fd_notify_on_read(grpc_fd* fd, grpc_closure* closure) {
+  fd->read_closure->NotifyOn(closure);
 }
 
-static void fd_notify_on_write(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_closure* closure) {
-  fd->write_closure->NotifyOn(exec_ctx, closure);
+static void fd_notify_on_write(grpc_fd* fd, grpc_closure* closure) {
+  fd->write_closure->NotifyOn(closure);
 }
 
-static void fd_become_readable(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_pollset* notifier) {
-  fd->read_closure->SetReady(exec_ctx);
+static void fd_become_readable(grpc_fd* fd, grpc_pollset* notifier) {
+  fd->read_closure->SetReady();
   /* Use release store to match with acquire load in fd_get_read_notifier */
   gpr_atm_rel_store(&fd->read_notifier_pollset, (gpr_atm)notifier);
 }
 
-static void fd_become_writable(grpc_exec_ctx* exec_ctx, grpc_fd* fd) {
-  fd->write_closure->SetReady(exec_ctx);
-}
+static void fd_become_writable(grpc_fd* fd) { fd->write_closure->SetReady(); }
 
 /*******************************************************************************
  * Pollset Definitions
@@ -479,7 +471,7 @@ static void pollset_init(grpc_pollset* pollset, gpr_mu** mu) {
   pollset->next = pollset->prev = nullptr;
 }
 
-static void pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
+static void pollset_destroy(grpc_pollset* pollset) {
   gpr_mu_lock(&pollset->mu);
   if (!pollset->seen_inactive) {
     pollset_neighborhood* neighborhood = pollset->neighborhood;
@@ -507,27 +499,26 @@ static void pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
   gpr_mu_destroy(&pollset->mu);
 }
 
-static grpc_error* pollset_kick_all(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset* pollset) {
+static grpc_error* pollset_kick_all(grpc_pollset* pollset) {
   GPR_TIMER_BEGIN("pollset_kick_all", 0);
   grpc_error* error = GRPC_ERROR_NONE;
   if (pollset->root_worker != nullptr) {
     grpc_pollset_worker* worker = pollset->root_worker;
     do {
-      GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
+      GRPC_STATS_INC_POLLSET_KICK();
       switch (worker->state) {
         case KICKED:
-          GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
+          GRPC_STATS_INC_POLLSET_KICKED_AGAIN();
           break;
         case UNKICKED:
           SET_KICK_STATE(worker, KICKED);
           if (worker->initialized_cv) {
-            GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+            GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
             gpr_cv_signal(&worker->cv);
           }
           break;
         case DESIGNATED_POLLER:
-          GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx);
+          GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD();
           SET_KICK_STATE(worker, KICKED);
           append_error(&error, grpc_wakeup_fd_wakeup(&global_wakeup_fd),
                        "pollset_kick_all");
@@ -543,32 +534,29 @@ static grpc_error* pollset_kick_all(grpc_exec_ctx* exec_ctx,
   return error;
 }
 
-static void pollset_maybe_finish_shutdown(grpc_exec_ctx* exec_ctx,
-                                          grpc_pollset* pollset) {
+static void pollset_maybe_finish_shutdown(grpc_pollset* pollset) {
   if (pollset->shutdown_closure != nullptr && pollset->root_worker == nullptr &&
       pollset->begin_refs == 0) {
     GPR_TIMER_MARK("pollset_finish_shutdown", 0);
-    GRPC_CLOSURE_SCHED(exec_ctx, pollset->shutdown_closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(pollset->shutdown_closure, GRPC_ERROR_NONE);
     pollset->shutdown_closure = nullptr;
   }
 }
 
-static void pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                             grpc_closure* closure) {
+static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
   GPR_TIMER_BEGIN("pollset_shutdown", 0);
   GPR_ASSERT(pollset->shutdown_closure == nullptr);
   GPR_ASSERT(!pollset->shutting_down);
   pollset->shutdown_closure = closure;
   pollset->shutting_down = true;
-  GRPC_LOG_IF_ERROR("pollset_shutdown", pollset_kick_all(exec_ctx, pollset));
-  pollset_maybe_finish_shutdown(exec_ctx, pollset);
+  GRPC_LOG_IF_ERROR("pollset_shutdown", pollset_kick_all(pollset));
+  pollset_maybe_finish_shutdown(pollset);
   GPR_TIMER_END("pollset_shutdown", 0);
 }
 
-static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
-                                           grpc_millis millis) {
+static int poll_deadline_to_millis_timeout(grpc_millis millis) {
   if (millis == GRPC_MILLIS_INF_FUTURE) return -1;
-  grpc_millis delta = millis - grpc_exec_ctx_now(exec_ctx);
+  grpc_millis delta = millis - grpc_core::ExecCtx::Get()->Now();
   if (delta > INT_MAX) {
     return INT_MAX;
   } else if (delta < 0) {
@@ -586,8 +574,7 @@ static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
    NOTE ON SYNCRHONIZATION: Similar to do_epoll_wait(), this function is only
    called by g_active_poller thread. So there is no need for synchronization
    when accessing fields in g_epoll_set */
-static grpc_error* process_epoll_events(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset* pollset) {
+static grpc_error* process_epoll_events(grpc_pollset* pollset) {
   static const char* err_desc = "process_events";
   grpc_error* error = GRPC_ERROR_NONE;
 
@@ -611,11 +598,11 @@ static grpc_error* process_epoll_events(grpc_exec_ctx* exec_ctx,
       bool write_ev = (ev->events & EPOLLOUT) != 0;
 
       if (read_ev || cancel) {
-        fd_become_readable(exec_ctx, fd, pollset);
+        fd_become_readable(fd, pollset);
       }
 
       if (write_ev || cancel) {
-        fd_become_writable(exec_ctx, fd);
+        fd_become_writable(fd);
       }
     }
   }
@@ -631,27 +618,26 @@ static grpc_error* process_epoll_events(grpc_exec_ctx* exec_ctx,
    NOTE ON SYNCHRONIZATION: At any point of time, only the g_active_poller
    (i.e the designated poller thread) will be calling this function. So there is
    no need for any synchronization when accesing fields in g_epoll_set */
-static grpc_error* do_epoll_wait(grpc_exec_ctx* exec_ctx, grpc_pollset* ps,
-                                 grpc_millis deadline) {
+static grpc_error* do_epoll_wait(grpc_pollset* ps, grpc_millis deadline) {
   GPR_TIMER_BEGIN("do_epoll_wait", 0);
 
   int r;
-  int timeout = poll_deadline_to_millis_timeout(exec_ctx, deadline);
+  int timeout = poll_deadline_to_millis_timeout(deadline);
   if (timeout != 0) {
     GRPC_SCHEDULING_START_BLOCKING_REGION;
   }
   do {
-    GRPC_STATS_INC_SYSCALL_POLL(exec_ctx);
+    GRPC_STATS_INC_SYSCALL_POLL();
     r = epoll_wait(g_epoll_set.epfd, g_epoll_set.events, MAX_EPOLL_EVENTS,
                    timeout);
   } while (r < 0 && errno == EINTR);
   if (timeout != 0) {
-    GRPC_SCHEDULING_END_BLOCKING_REGION_WITH_EXEC_CTX(exec_ctx);
+    GRPC_SCHEDULING_END_BLOCKING_REGION;
   }
 
   if (r < 0) return GRPC_OS_ERROR(errno, "epoll_wait");
 
-  GRPC_STATS_INC_POLL_EVENTS_RETURNED(exec_ctx, r);
+  GRPC_STATS_INC_POLL_EVENTS_RETURNED(r);
 
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "ps: %p poll got %d events", ps, r);
@@ -664,8 +650,7 @@ static grpc_error* do_epoll_wait(grpc_exec_ctx* exec_ctx, grpc_pollset* ps,
   return GRPC_ERROR_NONE;
 }
 
-static bool begin_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                         grpc_pollset_worker* worker,
+static bool begin_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
                          grpc_pollset_worker** worker_hdl,
                          grpc_millis deadline) {
   GPR_TIMER_BEGIN("begin_worker", 0);
@@ -753,14 +738,14 @@ static bool begin_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
       }
 
       if (gpr_cv_wait(&worker->cv, &pollset->mu,
-                      grpc_millis_to_timespec(deadline, GPR_CLOCK_REALTIME)) &&
+                      grpc_millis_to_timespec(deadline, GPR_CLOCK_MONOTONIC)) &&
           worker->state == UNKICKED) {
         /* If gpr_cv_wait returns true (i.e a timeout), pretend that the worker
            received a kick */
         SET_KICK_STATE(worker, KICKED);
       }
     }
-    grpc_exec_ctx_invalidate_now(exec_ctx);
+    grpc_core::ExecCtx::Get()->InvalidateNow();
   }
 
   if (grpc_polling_trace.enabled()) {
@@ -791,7 +776,7 @@ static bool begin_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
 }
 
 static bool check_neighborhood_for_available_poller(
-    grpc_exec_ctx* exec_ctx, pollset_neighborhood* neighborhood) {
+    pollset_neighborhood* neighborhood) {
   GPR_TIMER_BEGIN("check_neighborhood_for_available_poller", 0);
   bool found_worker = false;
   do {
@@ -815,7 +800,7 @@ static bool check_neighborhood_for_available_poller(
               SET_KICK_STATE(inspect_worker, DESIGNATED_POLLER);
               if (inspect_worker->initialized_cv) {
                 GPR_TIMER_MARK("signal worker", 0);
-                GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+                GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
                 gpr_cv_signal(&inspect_worker->cv);
               }
             } else {
@@ -855,8 +840,7 @@ static bool check_neighborhood_for_available_poller(
   return found_worker;
 }
 
-static void end_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                       grpc_pollset_worker* worker,
+static void end_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
                        grpc_pollset_worker** worker_hdl) {
   GPR_TIMER_BEGIN("end_worker", 0);
   if (grpc_polling_trace.enabled()) {
@@ -866,7 +850,7 @@ static void end_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
   /* Make sure we appear kicked */
   SET_KICK_STATE(worker, KICKED);
   grpc_closure_list_move(&worker->schedule_on_end_work,
-                         &exec_ctx->closure_list);
+                         grpc_core::ExecCtx::Get()->closure_list());
   if (gpr_atm_no_barrier_load(&g_active_poller) == (gpr_atm)worker) {
     if (worker->next != worker && worker->next->state == UNKICKED) {
       if (grpc_polling_trace.enabled()) {
@@ -875,11 +859,11 @@ static void end_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
       GPR_ASSERT(worker->next->initialized_cv);
       gpr_atm_no_barrier_store(&g_active_poller, (gpr_atm)worker->next);
       SET_KICK_STATE(worker->next, DESIGNATED_POLLER);
-      GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+      GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
       gpr_cv_signal(&worker->next->cv);
-      if (grpc_exec_ctx_has_work(exec_ctx)) {
+      if (grpc_core::ExecCtx::Get()->HasWork()) {
         gpr_mu_unlock(&pollset->mu);
-        grpc_exec_ctx_flush(exec_ctx);
+        grpc_core::ExecCtx::Get()->Flush();
         gpr_mu_lock(&pollset->mu);
       }
     } else {
@@ -894,8 +878,7 @@ static void end_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
             &g_neighborhoods[(poller_neighborhood_idx + i) %
                              g_num_neighborhoods];
         if (gpr_mu_trylock(&neighborhood->mu)) {
-          found_worker =
-              check_neighborhood_for_available_poller(exec_ctx, neighborhood);
+          found_worker = check_neighborhood_for_available_poller(neighborhood);
           gpr_mu_unlock(&neighborhood->mu);
           scan_state[i] = true;
         } else {
@@ -908,16 +891,15 @@ static void end_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
             &g_neighborhoods[(poller_neighborhood_idx + i) %
                              g_num_neighborhoods];
         gpr_mu_lock(&neighborhood->mu);
-        found_worker =
-            check_neighborhood_for_available_poller(exec_ctx, neighborhood);
+        found_worker = check_neighborhood_for_available_poller(neighborhood);
         gpr_mu_unlock(&neighborhood->mu);
       }
-      grpc_exec_ctx_flush(exec_ctx);
+      grpc_core::ExecCtx::Get()->Flush();
       gpr_mu_lock(&pollset->mu);
     }
-  } else if (grpc_exec_ctx_has_work(exec_ctx)) {
+  } else if (grpc_core::ExecCtx::Get()->HasWork()) {
     gpr_mu_unlock(&pollset->mu);
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(&pollset->mu);
   }
   if (worker->initialized_cv) {
@@ -927,7 +909,7 @@ static void end_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
     gpr_log(GPR_DEBUG, " .. remove worker");
   }
   if (EMPTIED == worker_remove(pollset, worker)) {
-    pollset_maybe_finish_shutdown(exec_ctx, pollset);
+    pollset_maybe_finish_shutdown(pollset);
   }
   GPR_ASSERT(gpr_atm_no_barrier_load(&g_active_poller) != (gpr_atm)worker);
   GPR_TIMER_END("end_worker", 0);
@@ -937,7 +919,7 @@ static void end_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
    The function pollset_work() may temporarily release the lock (pollset->po.mu)
    during the course of its execution but it will always re-acquire the lock and
    ensure that it is held by the time the function returns */
-static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* ps,
+static grpc_error* pollset_work(grpc_pollset* ps,
                                 grpc_pollset_worker** worker_hdl,
                                 grpc_millis deadline) {
   grpc_pollset_worker worker;
@@ -950,7 +932,7 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* ps,
     return GRPC_ERROR_NONE;
   }
 
-  if (begin_worker(exec_ctx, ps, &worker, worker_hdl, deadline)) {
+  if (begin_worker(ps, &worker, worker_hdl, deadline)) {
     gpr_tls_set(&g_current_thread_pollset, (intptr_t)ps);
     gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
     GPR_ASSERT(!ps->shutting_down);
@@ -968,14 +950,14 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* ps,
 
        process_epoll_events() returns very quickly: It just queues the work on
        exec_ctx but does not execute it (the actual exectution or more
-       accurately grpc_exec_ctx_flush() happens in end_worker() AFTER selecting
-       a designated poller). So we are not waiting long periods without a
-       designated poller */
+       accurately grpc_core::ExecCtx::Get()->Flush() happens in end_worker()
+       AFTER selecting a designated poller). So we are not waiting long periods
+       without a designated poller */
     if (gpr_atm_acq_load(&g_epoll_set.cursor) ==
         gpr_atm_acq_load(&g_epoll_set.num_events)) {
-      append_error(&error, do_epoll_wait(exec_ctx, ps, deadline), err_desc);
+      append_error(&error, do_epoll_wait(ps, deadline), err_desc);
     }
-    append_error(&error, process_epoll_events(exec_ctx, ps), err_desc);
+    append_error(&error, process_epoll_events(ps), err_desc);
 
     gpr_mu_lock(&ps->mu); /* lock */
 
@@ -983,17 +965,17 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* ps,
   } else {
     gpr_tls_set(&g_current_thread_pollset, (intptr_t)ps);
   }
-  end_worker(exec_ctx, ps, &worker, worker_hdl);
+  end_worker(ps, &worker, worker_hdl);
 
   gpr_tls_set(&g_current_thread_pollset, 0);
   GPR_TIMER_END("pollset_work", 0);
   return error;
 }
 
-static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+static grpc_error* pollset_kick(grpc_pollset* pollset,
                                 grpc_pollset_worker* specific_worker) {
   GPR_TIMER_BEGIN("pollset_kick", 0);
-  GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
+  GRPC_STATS_INC_POLLSET_KICK();
   grpc_error* ret_err = GRPC_ERROR_NONE;
   if (grpc_polling_trace.enabled()) {
     gpr_strvec log;
@@ -1026,7 +1008,7 @@ static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
     if (gpr_tls_get(&g_current_thread_pollset) != (intptr_t)pollset) {
       grpc_pollset_worker* root_worker = pollset->root_worker;
       if (root_worker == nullptr) {
-        GRPC_STATS_INC_POLLSET_KICKED_WITHOUT_POLLER(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICKED_WITHOUT_POLLER();
         pollset->kicked_without_poller = true;
         if (grpc_polling_trace.enabled()) {
           gpr_log(GPR_ERROR, " .. kicked_without_poller");
@@ -1035,14 +1017,14 @@ static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
       }
       grpc_pollset_worker* next_worker = root_worker->next;
       if (root_worker->state == KICKED) {
-        GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICKED_AGAIN();
         if (grpc_polling_trace.enabled()) {
           gpr_log(GPR_ERROR, " .. already kicked %p", root_worker);
         }
         SET_KICK_STATE(root_worker, KICKED);
         goto done;
       } else if (next_worker->state == KICKED) {
-        GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICKED_AGAIN();
         if (grpc_polling_trace.enabled()) {
           gpr_log(GPR_ERROR, " .. already kicked %p", next_worker);
         }
@@ -1053,7 +1035,7 @@ static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
                                      // there is no next worker
                  root_worker == (grpc_pollset_worker*)gpr_atm_no_barrier_load(
                                     &g_active_poller)) {
-        GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD();
         if (grpc_polling_trace.enabled()) {
           gpr_log(GPR_ERROR, " .. kicked %p", root_worker);
         }
@@ -1061,7 +1043,7 @@ static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
         ret_err = grpc_wakeup_fd_wakeup(&global_wakeup_fd);
         goto done;
       } else if (next_worker->state == UNKICKED) {
-        GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
         if (grpc_polling_trace.enabled()) {
           gpr_log(GPR_ERROR, " .. kicked %p", next_worker);
         }
@@ -1079,12 +1061,12 @@ static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
           }
           SET_KICK_STATE(root_worker, KICKED);
           if (root_worker->initialized_cv) {
-            GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+            GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
             gpr_cv_signal(&root_worker->cv);
           }
           goto done;
         } else {
-          GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx);
+          GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD();
           if (grpc_polling_trace.enabled()) {
             gpr_log(GPR_ERROR, " .. non-root poller %p (root=%p)", next_worker,
                     root_worker);
@@ -1094,13 +1076,13 @@ static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
           goto done;
         }
       } else {
-        GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICKED_AGAIN();
         GPR_ASSERT(next_worker->state == KICKED);
         SET_KICK_STATE(next_worker, KICKED);
         goto done;
       }
     } else {
-      GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD(exec_ctx);
+      GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD();
       if (grpc_polling_trace.enabled()) {
         gpr_log(GPR_ERROR, " .. kicked while waking up");
       }
@@ -1117,7 +1099,7 @@ static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
     goto done;
   } else if (gpr_tls_get(&g_current_thread_worker) ==
              (intptr_t)specific_worker) {
-    GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD();
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_ERROR, " .. mark %p kicked", specific_worker);
     }
@@ -1125,7 +1107,7 @@ static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
     goto done;
   } else if (specific_worker ==
              (grpc_pollset_worker*)gpr_atm_no_barrier_load(&g_active_poller)) {
-    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD();
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_ERROR, " .. kick active poller");
     }
@@ -1133,7 +1115,7 @@ static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
     ret_err = grpc_wakeup_fd_wakeup(&global_wakeup_fd);
     goto done;
   } else if (specific_worker->initialized_cv) {
-    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_ERROR, " .. kick waiting worker");
     }
@@ -1141,7 +1123,7 @@ static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
     gpr_cv_signal(&specific_worker->cv);
     goto done;
   } else {
-    GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICKED_AGAIN();
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_ERROR, " .. kick non-waiting worker");
     }
@@ -1153,8 +1135,7 @@ done:
   return ret_err;
 }
 
-static void pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_fd* fd) {}
+static void pollset_add_fd(grpc_pollset* pollset, grpc_fd* fd) {}
 
 /*******************************************************************************
  * Pollset-set Definitions
@@ -1164,27 +1145,20 @@ static grpc_pollset_set* pollset_set_create(void) {
   return (grpc_pollset_set*)((intptr_t)0xdeafbeef);
 }
 
-static void pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_pollset_set* pss) {}
+static void pollset_set_destroy(grpc_pollset_set* pss) {}
 
-static void pollset_set_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
-                               grpc_fd* fd) {}
+static void pollset_set_add_fd(grpc_pollset_set* pss, grpc_fd* fd) {}
 
-static void pollset_set_del_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
-                               grpc_fd* fd) {}
+static void pollset_set_del_fd(grpc_pollset_set* pss, grpc_fd* fd) {}
 
-static void pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pss, grpc_pollset* ps) {}
+static void pollset_set_add_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {}
 
-static void pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pss, grpc_pollset* ps) {}
+static void pollset_set_del_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {}
 
-static void pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {}
 
-static void pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {}
 
 /*******************************************************************************
@@ -1260,7 +1234,7 @@ const grpc_event_engine_vtable* grpc_init_epoll1_linux(bool explicit_request) {
 const grpc_event_engine_vtable* grpc_init_epoll1_linux(bool explicit_request) {
   gpr_log(GPR_ERROR,
           "Skipping epoll1 becuase GRPC_LINUX_EPOLL is not defined.");
-  return NULL;
+  return nullptr;
 }
 #endif /* defined(GRPC_POSIX_SOCKET) */
 #endif /* !defined(GRPC_LINUX_EPOLL) */
diff --git a/src/core/lib/iomgr/ev_epollex_linux.cc b/src/core/lib/iomgr/ev_epollex_linux.cc
index 62643df697..b2817156a8 100644
--- a/src/core/lib/iomgr/ev_epollex_linux.cc
+++ b/src/core/lib/iomgr/ev_epollex_linux.cc
@@ -257,8 +257,7 @@ static gpr_mu fd_freelist_mu;
 
 #ifndef NDEBUG
 #define REF_BY(fd, n, reason) ref_by(fd, n, reason, __FILE__, __LINE__)
-#define UNREF_BY(ec, fd, n, reason) \
-  unref_by(ec, fd, n, reason, __FILE__, __LINE__)
+#define UNREF_BY(fd, n, reason) unref_by(fd, n, reason, __FILE__, __LINE__)
 static void ref_by(grpc_fd* fd, int n, const char* reason, const char* file,
                    int line) {
   if (grpc_trace_fd_refcount.enabled()) {
@@ -269,13 +268,13 @@ static void ref_by(grpc_fd* fd, int n, const char* reason, const char* file,
   }
 #else
 #define REF_BY(fd, n, reason) ref_by(fd, n)
-#define UNREF_BY(ec, fd, n, reason) unref_by(ec, fd, n)
+#define UNREF_BY(fd, n, reason) unref_by(fd, n)
 static void ref_by(grpc_fd* fd, int n) {
 #endif
   GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&fd->refst, n) > 0);
 }
 
-static void fd_destroy(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void fd_destroy(void* arg, grpc_error* error) {
   grpc_fd* fd = (grpc_fd*)arg;
   /* Add the fd to the freelist */
   grpc_iomgr_unregister_object(&fd->iomgr_object);
@@ -293,8 +292,8 @@ static void fd_destroy(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
 }
 
 #ifndef NDEBUG
-static void unref_by(grpc_exec_ctx* exec_ctx, grpc_fd* fd, int n,
-                     const char* reason, const char* file, int line) {
+static void unref_by(grpc_fd* fd, int n, const char* reason, const char* file,
+                     int line) {
   if (grpc_trace_fd_refcount.enabled()) {
     gpr_log(GPR_DEBUG,
             "FD %d %p unref %d %" PRIdPTR " -> %" PRIdPTR " [%s; %s:%d]",
@@ -302,12 +301,11 @@ static void unref_by(grpc_exec_ctx* exec_ctx, grpc_fd* fd, int n,
             gpr_atm_no_barrier_load(&fd->refst) - n, reason, file, line);
   }
 #else
-static void unref_by(grpc_exec_ctx* exec_ctx, grpc_fd* fd, int n) {
+static void unref_by(grpc_fd* fd, int n) {
 #endif
   gpr_atm old = gpr_atm_full_fetch_add(&fd->refst, -n);
   if (old == n) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_CREATE(fd_destroy, fd, grpc_schedule_on_exec_ctx),
         GRPC_ERROR_NONE);
   } else {
@@ -373,8 +371,7 @@ static int fd_wrapped_fd(grpc_fd* fd) {
   return (gpr_atm_acq_load(&fd->refst) & 1) ? ret_fd : -1;
 }
 
-static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                      grpc_closure* on_done, int* release_fd,
+static void fd_orphan(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
                       bool already_closed, const char* reason) {
   bool is_fd_closed = already_closed;
 
@@ -399,15 +396,14 @@ static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
      to be alive (and not added to freelist) until the end of this function */
   REF_BY(fd, 1, reason);
 
-  GRPC_CLOSURE_SCHED(exec_ctx, fd->on_done_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(fd->on_done_closure, GRPC_ERROR_NONE);
 
   gpr_mu_unlock(&fd->orphan_mu);
 
-  UNREF_BY(exec_ctx, fd, 2, reason); /* Drop the reference */
+  UNREF_BY(fd, 2, reason); /* Drop the reference */
 }
 
-static grpc_pollset* fd_get_read_notifier_pollset(grpc_exec_ctx* exec_ctx,
-                                                  grpc_fd* fd) {
+static grpc_pollset* fd_get_read_notifier_pollset(grpc_fd* fd) {
   gpr_atm notifier = gpr_atm_acq_load(&fd->read_notifier_pollset);
   return (grpc_pollset*)notifier;
 }
@@ -417,22 +413,20 @@ static bool fd_is_shutdown(grpc_fd* fd) {
 }
 
 /* Might be called multiple times */
-static void fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why) {
-  if (fd->read_closure->SetShutdown(exec_ctx, GRPC_ERROR_REF(why))) {
+static void fd_shutdown(grpc_fd* fd, grpc_error* why) {
+  if (fd->read_closure->SetShutdown(GRPC_ERROR_REF(why))) {
     shutdown(fd->fd, SHUT_RDWR);
-    fd->write_closure->SetShutdown(exec_ctx, GRPC_ERROR_REF(why));
+    fd->write_closure->SetShutdown(GRPC_ERROR_REF(why));
   }
   GRPC_ERROR_UNREF(why);
 }
 
-static void fd_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                              grpc_closure* closure) {
-  fd->read_closure->NotifyOn(exec_ctx, closure);
+static void fd_notify_on_read(grpc_fd* fd, grpc_closure* closure) {
+  fd->read_closure->NotifyOn(closure);
 }
 
-static void fd_notify_on_write(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_closure* closure) {
-  fd->write_closure->NotifyOn(exec_ctx, closure);
+static void fd_notify_on_write(grpc_fd* fd, grpc_closure* closure) {
+  fd->write_closure->NotifyOn(closure);
 }
 
 /*******************************************************************************
@@ -556,8 +550,7 @@ static void pollset_global_shutdown(void) {
 }
 
 /* pollset->mu must be held while calling this function */
-static void pollset_maybe_finish_shutdown(grpc_exec_ctx* exec_ctx,
-                                          grpc_pollset* pollset) {
+static void pollset_maybe_finish_shutdown(grpc_pollset* pollset) {
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "PS:%p (pollable:%p) maybe_finish_shutdown sc=%p (target:!NULL) "
@@ -567,7 +560,7 @@ static void pollset_maybe_finish_shutdown(grpc_exec_ctx* exec_ctx,
   }
   if (pollset->shutdown_closure != nullptr && pollset->root_worker == nullptr &&
       pollset->containing_pollset_set_count == 0) {
-    GRPC_CLOSURE_SCHED(exec_ctx, pollset->shutdown_closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(pollset->shutdown_closure, GRPC_ERROR_NONE);
     pollset->shutdown_closure = nullptr;
   }
 }
@@ -575,8 +568,7 @@ static void pollset_maybe_finish_shutdown(grpc_exec_ctx* exec_ctx,
 /* pollset->mu must be held before calling this function,
  * pollset->active_pollable->mu & specific_worker->pollable_obj->mu must not be
  * held */
-static grpc_error* kick_one_worker(grpc_exec_ctx* exec_ctx,
-                                   grpc_pollset_worker* specific_worker) {
+static grpc_error* kick_one_worker(grpc_pollset_worker* specific_worker) {
   pollable* p = specific_worker->pollable_obj;
   grpc_core::mu_guard lock(&p->mu);
   GPR_ASSERT(specific_worker != nullptr);
@@ -584,19 +576,19 @@ static grpc_error* kick_one_worker(grpc_exec_ctx* exec_ctx,
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_DEBUG, "PS:%p kicked_specific_but_already_kicked", p);
     }
-    GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICKED_AGAIN();
     return GRPC_ERROR_NONE;
   }
   if (gpr_tls_get(&g_current_thread_worker) == (intptr_t)specific_worker) {
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_DEBUG, "PS:%p kicked_specific_but_awake", p);
     }
-    GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD();
     specific_worker->kicked = true;
     return GRPC_ERROR_NONE;
   }
   if (specific_worker == p->root_worker) {
-    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD();
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_DEBUG, "PS:%p kicked_specific_via_wakeup_fd", p);
     }
@@ -605,7 +597,7 @@ static grpc_error* kick_one_worker(grpc_exec_ctx* exec_ctx,
     return error;
   }
   if (specific_worker->initialized_cv) {
-    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_DEBUG, "PS:%p kicked_specific_via_cv", p);
     }
@@ -618,9 +610,9 @@ static grpc_error* kick_one_worker(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+static grpc_error* pollset_kick(grpc_pollset* pollset,
                                 grpc_pollset_worker* specific_worker) {
-  GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
+  GRPC_STATS_INC_POLLSET_KICK();
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "PS:%p kick %p tls_pollset=%p tls_worker=%p pollset.root_worker=%p",
@@ -634,7 +626,7 @@ static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
         if (grpc_polling_trace.enabled()) {
           gpr_log(GPR_DEBUG, "PS:%p kicked_any_without_poller", pollset);
         }
-        GRPC_STATS_INC_POLLSET_KICKED_WITHOUT_POLLER(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICKED_WITHOUT_POLLER();
         pollset->kicked_without_poller = true;
         return GRPC_ERROR_NONE;
       } else {
@@ -654,29 +646,28 @@ static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
         // so we take our chances and choose the SECOND worker enqueued against
         // the pollset as a worker that's likely to be in cv_wait
         return kick_one_worker(
-            exec_ctx, pollset->root_worker->links[PWLINK_POLLSET].next);
+            pollset->root_worker->links[PWLINK_POLLSET].next);
       }
     } else {
       if (grpc_polling_trace.enabled()) {
         gpr_log(GPR_DEBUG, "PS:%p kicked_any_but_awake", pollset);
       }
-      GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD(exec_ctx);
+      GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD();
       return GRPC_ERROR_NONE;
     }
   } else {
-    return kick_one_worker(exec_ctx, specific_worker);
+    return kick_one_worker(specific_worker);
   }
 }
 
-static grpc_error* pollset_kick_all(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset* pollset) {
+static grpc_error* pollset_kick_all(grpc_pollset* pollset) {
   grpc_error* error = GRPC_ERROR_NONE;
   const char* err_desc = "pollset_kick_all";
   grpc_pollset_worker* w = pollset->root_worker;
   if (w != nullptr) {
     do {
-      GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
-      append_error(&error, kick_one_worker(exec_ctx, w), err_desc);
+      GRPC_STATS_INC_POLLSET_KICK();
+      append_error(&error, kick_one_worker(w), err_desc);
       w = w->links[PWLINK_POLLSET].next;
     } while (w != pollset->root_worker);
   }
@@ -689,10 +680,9 @@ static void pollset_init(grpc_pollset* pollset, gpr_mu** mu) {
   *mu = &pollset->mu;
 }
 
-static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
-                                           grpc_millis millis) {
+static int poll_deadline_to_millis_timeout(grpc_millis millis) {
   if (millis == GRPC_MILLIS_INF_FUTURE) return -1;
-  grpc_millis delta = millis - grpc_exec_ctx_now(exec_ctx);
+  grpc_millis delta = millis - grpc_core::ExecCtx::Get()->Now();
   if (delta > INT_MAX)
     return INT_MAX;
   else if (delta < 0)
@@ -701,9 +691,8 @@ static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
     return (int)delta;
 }
 
-static void fd_become_readable(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_pollset* notifier) {
-  fd->read_closure->SetReady(exec_ctx);
+static void fd_become_readable(grpc_fd* fd, grpc_pollset* notifier) {
+  fd->read_closure->SetReady();
 
   /* Note, it is possible that fd_become_readable might be called twice with
      different 'notifier's when an fd becomes readable and it is in two epoll
@@ -714,9 +703,7 @@ static void fd_become_readable(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
   gpr_atm_rel_store(&fd->read_notifier_pollset, (gpr_atm)notifier);
 }
 
-static void fd_become_writable(grpc_exec_ctx* exec_ctx, grpc_fd* fd) {
-  fd->write_closure->SetReady(exec_ctx);
-}
+static void fd_become_writable(grpc_fd* fd) { fd->write_closure->SetReady(); }
 
 static grpc_error* fd_get_or_become_pollable(grpc_fd* fd, pollable** p) {
   gpr_mu_lock(&fd->pollable_mu);
@@ -745,16 +732,14 @@ static grpc_error* fd_get_or_become_pollable(grpc_fd* fd, pollable** p) {
 }
 
 /* pollset->po.mu lock must be held by the caller before calling this */
-static void pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                             grpc_closure* closure) {
+static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
   GPR_ASSERT(pollset->shutdown_closure == nullptr);
   pollset->shutdown_closure = closure;
-  GRPC_LOG_IF_ERROR("pollset_shutdown", pollset_kick_all(exec_ctx, pollset));
-  pollset_maybe_finish_shutdown(exec_ctx, pollset);
+  GRPC_LOG_IF_ERROR("pollset_shutdown", pollset_kick_all(pollset));
+  pollset_maybe_finish_shutdown(pollset);
 }
 
-static grpc_error* pollable_process_events(grpc_exec_ctx* exec_ctx,
-                                           grpc_pollset* pollset,
+static grpc_error* pollable_process_events(grpc_pollset* pollset,
                                            pollable* pollable_obj, bool drain) {
   static const char* err_desc = "pollset_process_events";
   grpc_error* error = GRPC_ERROR_NONE;
@@ -784,10 +769,10 @@ static grpc_error* pollable_process_events(grpc_exec_ctx* exec_ctx,
                 pollset, fd, cancel, read_ev, write_ev);
       }
       if (read_ev || cancel) {
-        fd_become_readable(exec_ctx, fd, pollset);
+        fd_become_readable(fd, pollset);
       }
       if (write_ev || cancel) {
-        fd_become_writable(exec_ctx, fd);
+        fd_become_writable(fd);
       }
     }
   }
@@ -796,14 +781,13 @@ static grpc_error* pollable_process_events(grpc_exec_ctx* exec_ctx,
 }
 
 /* pollset_shutdown is guaranteed to be called before pollset_destroy. */
-static void pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
+static void pollset_destroy(grpc_pollset* pollset) {
   POLLABLE_UNREF(pollset->active_pollable, "pollset");
   pollset->active_pollable = nullptr;
 }
 
-static grpc_error* pollable_epoll(grpc_exec_ctx* exec_ctx, pollable* p,
-                                  grpc_millis deadline) {
-  int timeout = poll_deadline_to_millis_timeout(exec_ctx, deadline);
+static grpc_error* pollable_epoll(pollable* p, grpc_millis deadline) {
+  int timeout = poll_deadline_to_millis_timeout(deadline);
 
   if (grpc_polling_trace.enabled()) {
     char* desc = pollable_desc(p);
@@ -816,11 +800,11 @@ static grpc_error* pollable_epoll(grpc_exec_ctx* exec_ctx, pollable* p,
   }
   int r;
   do {
-    GRPC_STATS_INC_SYSCALL_POLL(exec_ctx);
+    GRPC_STATS_INC_SYSCALL_POLL();
     r = epoll_wait(p->epfd, p->events, MAX_EPOLL_EVENTS, timeout);
   } while (r < 0 && errno == EINTR);
   if (timeout != 0) {
-    GRPC_SCHEDULING_END_BLOCKING_REGION_WITH_EXEC_CTX(exec_ctx);
+    GRPC_SCHEDULING_END_BLOCKING_REGION;
   }
 
   if (r < 0) return GRPC_OS_ERROR(errno, "epoll_wait");
@@ -875,8 +859,7 @@ static worker_remove_result worker_remove(grpc_pollset_worker** root_worker,
 }
 
 /* Return true if this thread should poll */
-static bool begin_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                         grpc_pollset_worker* worker,
+static bool begin_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
                          grpc_pollset_worker** worker_hdl,
                          grpc_millis deadline) {
   bool do_poll = (pollset->shutdown_closure == nullptr);
@@ -897,7 +880,7 @@ static bool begin_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
         worker->pollable_obj->root_worker != worker) {
       gpr_log(GPR_DEBUG, "PS:%p wait %p w=%p for %dms", pollset,
               worker->pollable_obj, worker,
-              poll_deadline_to_millis_timeout(exec_ctx, deadline));
+              poll_deadline_to_millis_timeout(deadline));
     }
     while (do_poll && worker->pollable_obj->root_worker != worker) {
       if (gpr_cv_wait(&worker->cv, &worker->pollable_obj->mu,
@@ -919,7 +902,7 @@ static bool begin_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
                 worker->pollable_obj, worker);
       }
     }
-    grpc_exec_ctx_invalidate_now(exec_ctx);
+    grpc_core::ExecCtx::Get()->InvalidateNow();
   } else {
     gpr_mu_unlock(&pollset->mu);
   }
@@ -928,8 +911,7 @@ static bool begin_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
   return do_poll;
 }
 
-static void end_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                       grpc_pollset_worker* worker,
+static void end_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
                        grpc_pollset_worker** worker_hdl) {
   gpr_mu_lock(&pollset->mu);
   gpr_mu_lock(&worker->pollable_obj->mu);
@@ -945,7 +927,7 @@ static void end_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
     case WRR_EMPTIED:
       if (pollset->active_pollable != worker->pollable_obj) {
         // pollable no longer being polled: flush events
-        pollable_process_events(exec_ctx, pollset, worker->pollable_obj, true);
+        pollable_process_events(pollset, worker->pollable_obj, true);
       }
       break;
     case WRR_REMOVED:
@@ -955,7 +937,7 @@ static void end_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
   POLLABLE_UNREF(worker->pollable_obj, "pollset_worker");
   if (worker_remove(&pollset->root_worker, worker, PWLINK_POLLSET) ==
       WRR_EMPTIED) {
-    pollset_maybe_finish_shutdown(exec_ctx, pollset);
+    pollset_maybe_finish_shutdown(pollset);
   }
   if (worker->initialized_cv) {
     gpr_cv_destroy(&worker->cv);
@@ -970,7 +952,7 @@ static long gettid(void) { return syscall(__NR_gettid); }
    The function pollset_work() may temporarily release the lock (pollset->po.mu)
    during the course of its execution but it will always re-acquire the lock and
    ensure that it is held by the time the function returns */
-static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+static grpc_error* pollset_work(grpc_pollset* pollset,
                                 grpc_pollset_worker** worker_hdl,
                                 grpc_millis deadline) {
 #ifdef GRPC_EPOLLEX_CREATE_WORKERS_ON_HEAP
@@ -988,7 +970,7 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
     gpr_log(GPR_DEBUG,
             "PS:%p work hdl=%p worker=%p now=%" PRIdPTR " deadline=%" PRIdPTR
             " kwp=%d pollable=%p",
-            pollset, worker_hdl, WORKER_PTR, grpc_exec_ctx_now(exec_ctx),
+            pollset, worker_hdl, WORKER_PTR, grpc_core::ExecCtx::Get()->Now(),
             deadline, pollset->kicked_without_poller, pollset->active_pollable);
   }
   static const char* err_desc = "pollset_work";
@@ -996,25 +978,23 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
   if (pollset->kicked_without_poller) {
     pollset->kicked_without_poller = false;
   } else {
-    if (begin_worker(exec_ctx, pollset, WORKER_PTR, worker_hdl, deadline)) {
+    if (begin_worker(pollset, WORKER_PTR, worker_hdl, deadline)) {
       gpr_tls_set(&g_current_thread_pollset, (intptr_t)pollset);
       gpr_tls_set(&g_current_thread_worker, (intptr_t)WORKER_PTR);
       if (WORKER_PTR->pollable_obj->event_cursor ==
           WORKER_PTR->pollable_obj->event_count) {
-        append_error(
-            &error,
-            pollable_epoll(exec_ctx, WORKER_PTR->pollable_obj, deadline),
-            err_desc);
+        append_error(&error, pollable_epoll(WORKER_PTR->pollable_obj, deadline),
+                     err_desc);
       }
-      append_error(&error,
-                   pollable_process_events(exec_ctx, pollset,
-                                           WORKER_PTR->pollable_obj, false),
-                   err_desc);
-      grpc_exec_ctx_flush(exec_ctx);
+      append_error(
+          &error,
+          pollable_process_events(pollset, WORKER_PTR->pollable_obj, false),
+          err_desc);
+      grpc_core::ExecCtx::Get()->Flush();
       gpr_tls_set(&g_current_thread_pollset, 0);
       gpr_tls_set(&g_current_thread_worker, 0);
     }
-    end_worker(exec_ctx, pollset, WORKER_PTR, worker_hdl);
+    end_worker(pollset, WORKER_PTR, worker_hdl);
   }
 #ifdef GRPC_EPOLLEX_CREATE_WORKERS_ON_HEAP
   gpr_free(worker);
@@ -1024,7 +1004,7 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
 }
 
 static grpc_error* pollset_transition_pollable_from_empty_to_fd_locked(
-    grpc_exec_ctx* exec_ctx, grpc_pollset* pollset, grpc_fd* fd) {
+    grpc_pollset* pollset, grpc_fd* fd) {
   static const char* err_desc = "pollset_transition_pollable_from_empty_to_fd";
   grpc_error* error = GRPC_ERROR_NONE;
   if (grpc_polling_trace.enabled()) {
@@ -1032,7 +1012,7 @@ static grpc_error* pollset_transition_pollable_from_empty_to_fd_locked(
             "PS:%p add fd %p (%d); transition pollable from empty to fd",
             pollset, fd, fd->fd);
   }
-  append_error(&error, pollset_kick_all(exec_ctx, pollset), err_desc);
+  append_error(&error, pollset_kick_all(pollset), err_desc);
   POLLABLE_UNREF(pollset->active_pollable, "pollset");
   append_error(&error, fd_get_or_become_pollable(fd, &pollset->active_pollable),
                err_desc);
@@ -1040,7 +1020,7 @@ static grpc_error* pollset_transition_pollable_from_empty_to_fd_locked(
 }
 
 static grpc_error* pollset_transition_pollable_from_fd_to_multi_locked(
-    grpc_exec_ctx* exec_ctx, grpc_pollset* pollset, grpc_fd* and_add_fd) {
+    grpc_pollset* pollset, grpc_fd* and_add_fd) {
   static const char* err_desc = "pollset_transition_pollable_from_fd_to_multi";
   grpc_error* error = GRPC_ERROR_NONE;
   if (grpc_polling_trace.enabled()) {
@@ -1050,7 +1030,7 @@ static grpc_error* pollset_transition_pollable_from_fd_to_multi_locked(
         pollset, and_add_fd, and_add_fd ? and_add_fd->fd : -1,
         pollset->active_pollable->owner_fd);
   }
-  append_error(&error, pollset_kick_all(exec_ctx, pollset), err_desc);
+  append_error(&error, pollset_kick_all(pollset), err_desc);
   grpc_fd* initial_fd = pollset->active_pollable->owner_fd;
   POLLABLE_UNREF(pollset->active_pollable, "pollset");
   pollset->active_pollable = nullptr;
@@ -1068,27 +1048,25 @@ static grpc_error* pollset_transition_pollable_from_fd_to_multi_locked(
 }
 
 /* expects pollsets locked, flag whether fd is locked or not */
-static grpc_error* pollset_add_fd_locked(grpc_exec_ctx* exec_ctx,
-                                         grpc_pollset* pollset, grpc_fd* fd) {
+static grpc_error* pollset_add_fd_locked(grpc_pollset* pollset, grpc_fd* fd) {
   grpc_error* error = GRPC_ERROR_NONE;
   pollable* po_at_start =
       POLLABLE_REF(pollset->active_pollable, "pollset_add_fd");
   switch (pollset->active_pollable->type) {
     case PO_EMPTY:
       /* empty pollable --> single fd pollable */
-      error = pollset_transition_pollable_from_empty_to_fd_locked(exec_ctx,
-                                                                  pollset, fd);
+      error = pollset_transition_pollable_from_empty_to_fd_locked(pollset, fd);
       break;
     case PO_FD:
       gpr_mu_lock(&po_at_start->owner_fd->orphan_mu);
       if ((gpr_atm_no_barrier_load(&pollset->active_pollable->owner_fd->refst) &
            1) == 0) {
-        error = pollset_transition_pollable_from_empty_to_fd_locked(
-            exec_ctx, pollset, fd);
+        error =
+            pollset_transition_pollable_from_empty_to_fd_locked(pollset, fd);
       } else {
         /* fd --> multipoller */
-        error = pollset_transition_pollable_from_fd_to_multi_locked(
-            exec_ctx, pollset, fd);
+        error =
+            pollset_transition_pollable_from_fd_to_multi_locked(pollset, fd);
       }
       gpr_mu_unlock(&po_at_start->owner_fd->orphan_mu);
       break;
@@ -1105,8 +1083,7 @@ static grpc_error* pollset_add_fd_locked(grpc_exec_ctx* exec_ctx,
   return error;
 }
 
-static grpc_error* pollset_as_multipollable_locked(grpc_exec_ctx* exec_ctx,
-                                                   grpc_pollset* pollset,
+static grpc_error* pollset_as_multipollable_locked(grpc_pollset* pollset,
                                                    pollable** pollable_obj) {
   grpc_error* error = GRPC_ERROR_NONE;
   pollable* po_at_start =
@@ -1123,8 +1100,8 @@ static grpc_error* pollset_as_multipollable_locked(grpc_exec_ctx* exec_ctx,
         POLLABLE_UNREF(pollset->active_pollable, "pollset");
         error = pollable_create(PO_MULTI, &pollset->active_pollable);
       } else {
-        error = pollset_transition_pollable_from_fd_to_multi_locked(
-            exec_ctx, pollset, nullptr);
+        error = pollset_transition_pollable_from_fd_to_multi_locked(pollset,
+                                                                    nullptr);
       }
       gpr_mu_unlock(&po_at_start->owner_fd->orphan_mu);
       break;
@@ -1142,10 +1119,9 @@ static grpc_error* pollset_as_multipollable_locked(grpc_exec_ctx* exec_ctx,
   return error;
 }
 
-static void pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_fd* fd) {
+static void pollset_add_fd(grpc_pollset* pollset, grpc_fd* fd) {
   gpr_mu_lock(&pollset->mu);
-  grpc_error* error = pollset_add_fd_locked(exec_ctx, pollset, fd);
+  grpc_error* error = pollset_add_fd_locked(pollset, fd);
   gpr_mu_unlock(&pollset->mu);
   GRPC_LOG_IF_ERROR("pollset_add_fd", error);
 }
@@ -1171,28 +1147,27 @@ static grpc_pollset_set* pollset_set_create(void) {
   return pss;
 }
 
-static void pollset_set_unref(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss) {
+static void pollset_set_unref(grpc_pollset_set* pss) {
   if (pss == nullptr) return;
   if (!gpr_unref(&pss->refs)) return;
-  pollset_set_unref(exec_ctx, pss->parent);
+  pollset_set_unref(pss->parent);
   gpr_mu_destroy(&pss->mu);
   for (size_t i = 0; i < pss->pollset_count; i++) {
     gpr_mu_lock(&pss->pollsets[i]->mu);
     if (0 == --pss->pollsets[i]->containing_pollset_set_count) {
-      pollset_maybe_finish_shutdown(exec_ctx, pss->pollsets[i]);
+      pollset_maybe_finish_shutdown(pss->pollsets[i]);
     }
     gpr_mu_unlock(&pss->pollsets[i]->mu);
   }
   for (size_t i = 0; i < pss->fd_count; i++) {
-    UNREF_BY(exec_ctx, pss->fds[i], 2, "pollset_set");
+    UNREF_BY(pss->fds[i], 2, "pollset_set");
   }
   gpr_free(pss->pollsets);
   gpr_free(pss->fds);
   gpr_free(pss);
 }
 
-static void pollset_set_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
-                               grpc_fd* fd) {
+static void pollset_set_add_fd(grpc_pollset_set* pss, grpc_fd* fd) {
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS:%p: add fd %p (%d)", pss, fd, fd->fd);
   }
@@ -1215,8 +1190,7 @@ static void pollset_set_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
   GRPC_LOG_IF_ERROR(err_desc, error);
 }
 
-static void pollset_set_del_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
-                               grpc_fd* fd) {
+static void pollset_set_del_fd(grpc_pollset_set* pss, grpc_fd* fd) {
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS:%p: del fd %p", pss, fd);
   }
@@ -1224,7 +1198,7 @@ static void pollset_set_del_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
   size_t i;
   for (i = 0; i < pss->fd_count; i++) {
     if (pss->fds[i] == fd) {
-      UNREF_BY(exec_ctx, fd, 2, "pollset_set");
+      UNREF_BY(fd, 2, "pollset_set");
       break;
     }
   }
@@ -1236,8 +1210,7 @@ static void pollset_set_del_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
   gpr_mu_unlock(&pss->mu);
 }
 
-static void pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pss, grpc_pollset* ps) {
+static void pollset_set_del_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS:%p: del pollset %p", pss, ps);
   }
@@ -1256,15 +1229,15 @@ static void pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
   gpr_mu_unlock(&pss->mu);
   gpr_mu_lock(&ps->mu);
   if (0 == --ps->containing_pollset_set_count) {
-    pollset_maybe_finish_shutdown(exec_ctx, ps);
+    pollset_maybe_finish_shutdown(ps);
   }
   gpr_mu_unlock(&ps->mu);
 }
 
 // add all fds to pollables, and output a new array of unorphaned out_fds
 // assumes pollsets are multipollable
-static grpc_error* add_fds_to_pollsets(grpc_exec_ctx* exec_ctx, grpc_fd** fds,
-                                       size_t fd_count, grpc_pollset** pollsets,
+static grpc_error* add_fds_to_pollsets(grpc_fd** fds, size_t fd_count,
+                                       grpc_pollset** pollsets,
                                        size_t pollset_count,
                                        const char* err_desc, grpc_fd** out_fds,
                                        size_t* out_fd_count) {
@@ -1273,7 +1246,7 @@ static grpc_error* add_fds_to_pollsets(grpc_exec_ctx* exec_ctx, grpc_fd** fds,
     gpr_mu_lock(&fds[i]->orphan_mu);
     if ((gpr_atm_no_barrier_load(&fds[i]->refst) & 1) == 0) {
       gpr_mu_unlock(&fds[i]->orphan_mu);
-      UNREF_BY(exec_ctx, fds[i], 2, "pollset_set");
+      UNREF_BY(fds[i], 2, "pollset_set");
     } else {
       for (size_t j = 0; j < pollset_count; j++) {
         append_error(&error,
@@ -1287,8 +1260,7 @@ static grpc_error* add_fds_to_pollsets(grpc_exec_ctx* exec_ctx, grpc_fd** fds,
   return error;
 }
 
-static void pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pss, grpc_pollset* ps) {
+static void pollset_set_add_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS:%p: add pollset %p", pss, ps);
   }
@@ -1296,8 +1268,8 @@ static void pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
   static const char* err_desc = "pollset_set_add_pollset";
   pollable* pollable_obj = nullptr;
   gpr_mu_lock(&ps->mu);
-  if (!GRPC_LOG_IF_ERROR(err_desc, pollset_as_multipollable_locked(
-                                       exec_ctx, ps, &pollable_obj))) {
+  if (!GRPC_LOG_IF_ERROR(err_desc,
+                         pollset_as_multipollable_locked(ps, &pollable_obj))) {
     GPR_ASSERT(pollable_obj == nullptr);
     gpr_mu_unlock(&ps->mu);
     return;
@@ -1308,8 +1280,8 @@ static void pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
   size_t initial_fd_count = pss->fd_count;
   pss->fd_count = 0;
   append_error(&error,
-               add_fds_to_pollsets(exec_ctx, pss->fds, initial_fd_count, &ps, 1,
-                                   err_desc, pss->fds, &pss->fd_count),
+               add_fds_to_pollsets(pss->fds, initial_fd_count, &ps, 1, err_desc,
+                                   pss->fds, &pss->fd_count),
                err_desc);
   if (pss->pollset_count == pss->pollset_capacity) {
     pss->pollset_capacity = GPR_MAX(pss->pollset_capacity * 2, 8);
@@ -1323,8 +1295,7 @@ static void pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
   GRPC_LOG_IF_ERROR(err_desc, error);
 }
 
-static void pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* a,
+static void pollset_set_add_pollset_set(grpc_pollset_set* a,
                                         grpc_pollset_set* b) {
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS: merge (%p, %p)", a, b);
@@ -1373,13 +1344,13 @@ static void pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
   a->fd_count = 0;
   append_error(
       &error,
-      add_fds_to_pollsets(exec_ctx, a->fds, initial_a_fd_count, b->pollsets,
+      add_fds_to_pollsets(a->fds, initial_a_fd_count, b->pollsets,
                           b->pollset_count, "merge_a2b", a->fds, &a->fd_count),
       err_desc);
   append_error(
       &error,
-      add_fds_to_pollsets(exec_ctx, b->fds, b->fd_count, a->pollsets,
-                          a->pollset_count, "merge_b2a", a->fds, &a->fd_count),
+      add_fds_to_pollsets(b->fds, b->fd_count, a->pollsets, a->pollset_count,
+                          "merge_b2a", a->fds, &a->fd_count),
       err_desc);
   if (a->pollset_capacity < a->pollset_count + b->pollset_count) {
     a->pollset_capacity =
@@ -1401,8 +1372,7 @@ static void pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
   gpr_mu_unlock(&b->mu);
 }
 
-static void pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {}
 
 /*******************************************************************************
@@ -1481,7 +1451,7 @@ const grpc_event_engine_vtable* grpc_init_epollex_linux(
     bool explicitly_requested) {
   gpr_log(GPR_ERROR,
           "Skipping epollex becuase GRPC_LINUX_EPOLL is not defined.");
-  return NULL;
+  return nullptr;
 }
 #endif /* defined(GRPC_POSIX_SOCKET) */
 
diff --git a/src/core/lib/iomgr/ev_epollsig_linux.cc b/src/core/lib/iomgr/ev_epollsig_linux.cc
index 12c8483b8e..7a8962f4a8 100644
--- a/src/core/lib/iomgr/ev_epollsig_linux.cc
+++ b/src/core/lib/iomgr/ev_epollsig_linux.cc
@@ -165,13 +165,12 @@ static void fd_global_shutdown(void);
 #ifndef NDEBUG
 
 #define PI_ADD_REF(p, r) pi_add_ref_dbg((p), (r), __FILE__, __LINE__)
-#define PI_UNREF(exec_ctx, p, r) \
-  pi_unref_dbg((exec_ctx), (p), (r), __FILE__, __LINE__)
+#define PI_UNREF(p, r) pi_unref_dbg((p), (r), __FILE__, __LINE__)
 
 #else
 
 #define PI_ADD_REF(p, r) pi_add_ref((p))
-#define PI_UNREF(exec_ctx, p, r) pi_unref((exec_ctx), (p))
+#define PI_UNREF(p, r) pi_unref((p))
 
 #endif
 
@@ -270,7 +269,7 @@ static grpc_wakeup_fd polling_island_wakeup_fd;
 static __thread polling_island* g_current_thread_polling_island;
 
 /* Forward declaration */
-static void polling_island_delete(grpc_exec_ctx* exec_ctx, polling_island* pi);
+static void polling_island_delete(polling_island* pi);
 
 #ifdef GRPC_TSAN
 /* Currently TSAN may incorrectly flag data races between epoll_ctl and
@@ -284,7 +283,7 @@ gpr_atm g_epoll_sync;
 #endif /* defined(GRPC_TSAN) */
 
 static void pi_add_ref(polling_island* pi);
-static void pi_unref(grpc_exec_ctx* exec_ctx, polling_island* pi);
+static void pi_unref(polling_island* pi);
 
 #ifndef NDEBUG
 static void pi_add_ref_dbg(polling_island* pi, const char* reason,
@@ -299,8 +298,8 @@ static void pi_add_ref_dbg(polling_island* pi, const char* reason,
   pi_add_ref(pi);
 }
 
-static void pi_unref_dbg(grpc_exec_ctx* exec_ctx, polling_island* pi,
-                         const char* reason, const char* file, int line) {
+static void pi_unref_dbg(polling_island* pi, const char* reason,
+                         const char* file, int line) {
   if (grpc_polling_trace.enabled()) {
     gpr_atm old_cnt = gpr_atm_acq_load(&pi->ref_count);
     gpr_log(GPR_DEBUG,
@@ -308,7 +307,7 @@ static void pi_unref_dbg(grpc_exec_ctx* exec_ctx, polling_island* pi,
             " (%s) - (%s, %d)",
             pi, old_cnt, (old_cnt - 1), reason, file, line);
   }
-  pi_unref(exec_ctx, pi);
+  pi_unref(pi);
 }
 #endif
 
@@ -316,7 +315,7 @@ static void pi_add_ref(polling_island* pi) {
   gpr_atm_no_barrier_fetch_add(&pi->ref_count, 1);
 }
 
-static void pi_unref(grpc_exec_ctx* exec_ctx, polling_island* pi) {
+static void pi_unref(polling_island* pi) {
   /* If ref count went to zero, delete the polling island.
      Note that this deletion not be done under a lock. Once the ref count goes
      to zero, we are guaranteed that no one else holds a reference to the
@@ -327,9 +326,9 @@ static void pi_unref(grpc_exec_ctx* exec_ctx, polling_island* pi) {
    */
   if (1 == gpr_atm_full_fetch_add(&pi->ref_count, -1)) {
     polling_island* next = (polling_island*)gpr_atm_acq_load(&pi->merged_to);
-    polling_island_delete(exec_ctx, pi);
+    polling_island_delete(pi);
     if (next != nullptr) {
-      PI_UNREF(exec_ctx, next, "pi_delete"); /* Recursive call */
+      PI_UNREF(next, "pi_delete"); /* Recursive call */
     }
   }
 }
@@ -465,8 +464,7 @@ static void polling_island_remove_fd_locked(polling_island* pi, grpc_fd* fd,
 }
 
 /* Might return NULL in case of an error */
-static polling_island* polling_island_create(grpc_exec_ctx* exec_ctx,
-                                             grpc_fd* initial_fd,
+static polling_island* polling_island_create(grpc_fd* initial_fd,
                                              grpc_error** error) {
   polling_island* pi = nullptr;
   const char* err_desc = "polling_island_create";
@@ -482,7 +480,7 @@ static polling_island* polling_island_create(grpc_exec_ctx* exec_ctx,
 
   gpr_atm_rel_store(&pi->ref_count, 0);
   gpr_atm_rel_store(&pi->poller_count, 0);
-  gpr_atm_rel_store(&pi->merged_to, (gpr_atm)NULL);
+  gpr_atm_rel_store(&pi->merged_to, (gpr_atm) nullptr);
 
   pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
 
@@ -497,13 +495,13 @@ static polling_island* polling_island_create(grpc_exec_ctx* exec_ctx,
 
 done:
   if (*error != GRPC_ERROR_NONE) {
-    polling_island_delete(exec_ctx, pi);
+    polling_island_delete(pi);
     pi = nullptr;
   }
   return pi;
 }
 
-static void polling_island_delete(grpc_exec_ctx* exec_ctx, polling_island* pi) {
+static void polling_island_delete(polling_island* pi) {
   GPR_ASSERT(pi->fd_cnt == 0);
 
   if (pi->epoll_fd >= 0) {
@@ -862,8 +860,7 @@ static int fd_wrapped_fd(grpc_fd* fd) {
   return ret_fd;
 }
 
-static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                      grpc_closure* on_done, int* release_fd,
+static void fd_orphan(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
                       bool already_closed, const char* reason) {
   grpc_error* error = GRPC_ERROR_NONE;
   polling_island* unref_pi = nullptr;
@@ -902,7 +899,7 @@ static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
 
   fd->orphaned = true;
 
-  GRPC_CLOSURE_SCHED(exec_ctx, fd->on_done_closure, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_SCHED(fd->on_done_closure, GRPC_ERROR_REF(error));
 
   gpr_mu_unlock(&fd->po.mu);
   UNREF_BY(fd, 2, reason); /* Drop the reference */
@@ -911,7 +908,7 @@ static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
        The polling island owns a workqueue which owns an fd, and unreffing
        inside the lock can cause an eventual lock loop that makes TSAN very
        unhappy. */
-    PI_UNREF(exec_ctx, unref_pi, "fd_orphan");
+    PI_UNREF(unref_pi, "fd_orphan");
   }
   if (error != GRPC_ERROR_NONE) {
     const char* msg = grpc_error_string(error);
@@ -920,8 +917,7 @@ static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
   GRPC_ERROR_UNREF(error);
 }
 
-static grpc_pollset* fd_get_read_notifier_pollset(grpc_exec_ctx* exec_ctx,
-                                                  grpc_fd* fd) {
+static grpc_pollset* fd_get_read_notifier_pollset(grpc_fd* fd) {
   gpr_atm notifier = gpr_atm_acq_load(&fd->read_notifier_pollset);
   return (grpc_pollset*)notifier;
 }
@@ -931,22 +927,20 @@ static bool fd_is_shutdown(grpc_fd* fd) {
 }
 
 /* Might be called multiple times */
-static void fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why) {
-  if (fd->read_closure->SetShutdown(exec_ctx, GRPC_ERROR_REF(why))) {
+static void fd_shutdown(grpc_fd* fd, grpc_error* why) {
+  if (fd->read_closure->SetShutdown(GRPC_ERROR_REF(why))) {
     shutdown(fd->fd, SHUT_RDWR);
-    fd->write_closure->SetShutdown(exec_ctx, GRPC_ERROR_REF(why));
+    fd->write_closure->SetShutdown(GRPC_ERROR_REF(why));
   }
   GRPC_ERROR_UNREF(why);
 }
 
-static void fd_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                              grpc_closure* closure) {
-  fd->read_closure->NotifyOn(exec_ctx, closure);
+static void fd_notify_on_read(grpc_fd* fd, grpc_closure* closure) {
+  fd->read_closure->NotifyOn(closure);
 }
 
-static void fd_notify_on_write(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_closure* closure) {
-  fd->write_closure->NotifyOn(exec_ctx, closure);
+static void fd_notify_on_write(grpc_fd* fd, grpc_closure* closure) {
+  fd->write_closure->NotifyOn(closure);
 }
 
 /*******************************************************************************
@@ -1028,11 +1022,11 @@ static void push_front_worker(grpc_pollset* p, grpc_pollset_worker* worker) {
 }
 
 /* p->mu must be held before calling this function */
-static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
+static grpc_error* pollset_kick(grpc_pollset* p,
                                 grpc_pollset_worker* specific_worker) {
   GPR_TIMER_BEGIN("pollset_kick", 0);
   grpc_error* error = GRPC_ERROR_NONE;
-  GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
+  GRPC_STATS_INC_POLLSET_KICK();
   const char* err_desc = "Kick Failure";
   grpc_pollset_worker* worker = specific_worker;
   if (worker != nullptr) {
@@ -1096,10 +1090,9 @@ static void pollset_init(grpc_pollset* pollset, gpr_mu** mu) {
   pollset->shutdown_done = nullptr;
 }
 
-static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
-                                           grpc_millis millis) {
+static int poll_deadline_to_millis_timeout(grpc_millis millis) {
   if (millis == GRPC_MILLIS_INF_FUTURE) return -1;
-  grpc_millis delta = millis - grpc_exec_ctx_now(exec_ctx);
+  grpc_millis delta = millis - grpc_core::ExecCtx::Get()->Now();
   if (delta > INT_MAX)
     return INT_MAX;
   else if (delta < 0)
@@ -1108,9 +1101,8 @@ static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
     return (int)delta;
 }
 
-static void fd_become_readable(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_pollset* notifier) {
-  fd->read_closure->SetReady(exec_ctx);
+static void fd_become_readable(grpc_fd* fd, grpc_pollset* notifier) {
+  fd->read_closure->SetReady();
 
   /* Note, it is possible that fd_become_readable might be called twice with
      different 'notifier's when an fd becomes readable and it is in two epoll
@@ -1121,39 +1113,34 @@ static void fd_become_readable(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
   gpr_atm_rel_store(&fd->read_notifier_pollset, (gpr_atm)notifier);
 }
 
-static void fd_become_writable(grpc_exec_ctx* exec_ctx, grpc_fd* fd) {
-  fd->write_closure->SetReady(exec_ctx);
-}
+static void fd_become_writable(grpc_fd* fd) { fd->write_closure->SetReady(); }
 
-static void pollset_release_polling_island(grpc_exec_ctx* exec_ctx,
-                                           grpc_pollset* ps,
+static void pollset_release_polling_island(grpc_pollset* ps,
                                            const char* reason) {
   if (ps->po.pi != nullptr) {
-    PI_UNREF(exec_ctx, ps->po.pi, reason);
+    PI_UNREF(ps->po.pi, reason);
   }
   ps->po.pi = nullptr;
 }
 
-static void finish_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_pollset* pollset) {
+static void finish_shutdown_locked(grpc_pollset* pollset) {
   /* The pollset cannot have any workers if we are at this stage */
   GPR_ASSERT(!pollset_has_workers(pollset));
 
   pollset->finish_shutdown_called = true;
 
   /* Release the ref and set pollset->po.pi to NULL */
-  pollset_release_polling_island(exec_ctx, pollset, "ps_shutdown");
-  GRPC_CLOSURE_SCHED(exec_ctx, pollset->shutdown_done, GRPC_ERROR_NONE);
+  pollset_release_polling_island(pollset, "ps_shutdown");
+  GRPC_CLOSURE_SCHED(pollset->shutdown_done, GRPC_ERROR_NONE);
 }
 
 /* pollset->po.mu lock must be held by the caller before calling this */
-static void pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                             grpc_closure* closure) {
+static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
   GPR_TIMER_BEGIN("pollset_shutdown", 0);
   GPR_ASSERT(!pollset->shutting_down);
   pollset->shutting_down = true;
   pollset->shutdown_done = closure;
-  pollset_kick(exec_ctx, pollset, GRPC_POLLSET_KICK_BROADCAST);
+  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
 
   /* If the pollset has any workers, we cannot call finish_shutdown_locked()
      because it would release the underlying polling island. In such a case, we
@@ -1161,7 +1148,7 @@ static void pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
   if (!pollset_has_workers(pollset)) {
     GPR_ASSERT(!pollset->finish_shutdown_called);
     GPR_TIMER_MARK("pollset_shutdown.finish_shutdown_locked", 0);
-    finish_shutdown_locked(exec_ctx, pollset);
+    finish_shutdown_locked(pollset);
   }
   GPR_TIMER_END("pollset_shutdown", 0);
 }
@@ -1169,15 +1156,14 @@ static void pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
 /* pollset_shutdown is guaranteed to be called before pollset_destroy. So other
  * than destroying the mutexes, there is nothing special that needs to be done
  * here */
-static void pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
+static void pollset_destroy(grpc_pollset* pollset) {
   GPR_ASSERT(!pollset_has_workers(pollset));
   gpr_mu_destroy(&pollset->po.mu);
 }
 
 #define GRPC_EPOLL_MAX_EVENTS 100
 /* Note: sig_mask contains the signal mask to use *during* epoll_wait() */
-static void pollset_work_and_unlock(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset* pollset,
+static void pollset_work_and_unlock(grpc_pollset* pollset,
                                     grpc_pollset_worker* worker, int timeout_ms,
                                     sigset_t* sig_mask, grpc_error** error) {
   struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
@@ -1199,7 +1185,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx* exec_ctx,
      this function (i.e pollset_work_and_unlock()) is called */
 
   if (pollset->po.pi == nullptr) {
-    pollset->po.pi = polling_island_create(exec_ctx, nullptr, error);
+    pollset->po.pi = polling_island_create(nullptr, error);
     if (pollset->po.pi == nullptr) {
       GPR_TIMER_END("pollset_work_and_unlock", 0);
       return; /* Fatal error. We cannot continue */
@@ -1219,7 +1205,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx* exec_ctx,
     /* Always do PI_ADD_REF before PI_UNREF because PI_UNREF may cause the
        polling island to be deleted */
     PI_ADD_REF(pi, "ps");
-    PI_UNREF(exec_ctx, pollset->po.pi, "ps");
+    PI_UNREF(pollset->po.pi, "ps");
     pollset->po.pi = pi;
   }
 
@@ -1233,10 +1219,10 @@ static void pollset_work_and_unlock(grpc_exec_ctx* exec_ctx,
   g_current_thread_polling_island = pi;
 
   GRPC_SCHEDULING_START_BLOCKING_REGION;
-  GRPC_STATS_INC_SYSCALL_POLL(exec_ctx);
+  GRPC_STATS_INC_SYSCALL_POLL();
   ep_rv =
       epoll_pwait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, timeout_ms, sig_mask);
-  GRPC_SCHEDULING_END_BLOCKING_REGION_WITH_EXEC_CTX(exec_ctx);
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
   if (ep_rv < 0) {
     if (errno != EINTR) {
       gpr_asprintf(&err_msg,
@@ -1274,10 +1260,10 @@ static void pollset_work_and_unlock(grpc_exec_ctx* exec_ctx,
       int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
       int write_ev = ep_ev[i].events & EPOLLOUT;
       if (read_ev || cancel) {
-        fd_become_readable(exec_ctx, fd, pollset);
+        fd_become_readable(fd, pollset);
       }
       if (write_ev || cancel) {
-        fd_become_writable(exec_ctx, fd);
+        fd_become_writable(fd);
       }
     }
   }
@@ -1292,7 +1278,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx* exec_ctx,
      that we got before releasing the polling island lock). This is because
      pollset->po.pi pointer might get udpated in other parts of the
      code when there is an island merge while we are doing epoll_wait() above */
-  PI_UNREF(exec_ctx, pi, "ps_work");
+  PI_UNREF(pi, "ps_work");
 
   GPR_TIMER_END("pollset_work_and_unlock", 0);
 }
@@ -1301,12 +1287,12 @@ static void pollset_work_and_unlock(grpc_exec_ctx* exec_ctx,
    The function pollset_work() may temporarily release the lock (pollset->po.mu)
    during the course of its execution but it will always re-acquire the lock and
    ensure that it is held by the time the function returns */
-static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+static grpc_error* pollset_work(grpc_pollset* pollset,
                                 grpc_pollset_worker** worker_hdl,
                                 grpc_millis deadline) {
   GPR_TIMER_BEGIN("pollset_work", 0);
   grpc_error* error = GRPC_ERROR_NONE;
-  int timeout_ms = poll_deadline_to_millis_timeout(exec_ctx, deadline);
+  int timeout_ms = poll_deadline_to_millis_timeout(deadline);
 
   sigset_t new_mask;
 
@@ -1364,9 +1350,9 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
 
     push_front_worker(pollset, &worker); /* Add worker to pollset */
 
-    pollset_work_and_unlock(exec_ctx, pollset, &worker, timeout_ms,
-                            &g_orig_sigmask, &error);
-    grpc_exec_ctx_flush(exec_ctx);
+    pollset_work_and_unlock(pollset, &worker, timeout_ms, &g_orig_sigmask,
+                            &error);
+    grpc_core::ExecCtx::Get()->Flush();
 
     gpr_mu_lock(&pollset->po.mu);
 
@@ -1386,10 +1372,10 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
   if (pollset->shutting_down && !pollset_has_workers(pollset) &&
       !pollset->finish_shutdown_called) {
     GPR_TIMER_MARK("pollset_work.finish_shutdown_locked", 0);
-    finish_shutdown_locked(exec_ctx, pollset);
+    finish_shutdown_locked(pollset);
 
     gpr_mu_unlock(&pollset->po.mu);
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(&pollset->po.mu);
   }
 
@@ -1404,9 +1390,8 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
   return error;
 }
 
-static void add_poll_object(grpc_exec_ctx* exec_ctx, poll_obj* bag,
-                            poll_obj_type bag_type, poll_obj* item,
-                            poll_obj_type item_type) {
+static void add_poll_object(poll_obj* bag, poll_obj_type bag_type,
+                            poll_obj* item, poll_obj_type item_type) {
   GPR_TIMER_BEGIN("add_poll_object", 0);
 
 #ifndef NDEBUG
@@ -1456,7 +1441,7 @@ retry:
            keeping TSAN happy outweigh any performance advantage we might have
            by keeping the lock held. */
         gpr_mu_unlock(&item->mu);
-        pi_new = polling_island_create(exec_ctx, FD_FROM_PO(item), &error);
+        pi_new = polling_island_create(FD_FROM_PO(item), &error);
         gpr_mu_lock(&item->mu);
 
         /* Need to reverify any assumptions made between the initial lock and
@@ -1475,11 +1460,11 @@ retry:
           /* Ref and unref so that the polling island gets deleted during unref
            */
           PI_ADD_REF(pi_new, "dance_of_destruction");
-          PI_UNREF(exec_ctx, pi_new, "dance_of_destruction");
+          PI_UNREF(pi_new, "dance_of_destruction");
           goto retry;
         }
       } else {
-        pi_new = polling_island_create(exec_ctx, nullptr, &error);
+        pi_new = polling_island_create(nullptr, &error);
       }
 
       GRPC_POLLING_TRACE(
@@ -1533,7 +1518,7 @@ retry:
   if (item->pi != pi_new) {
     PI_ADD_REF(pi_new, poll_obj_string(item_type));
     if (item->pi != nullptr) {
-      PI_UNREF(exec_ctx, item->pi, poll_obj_string(item_type));
+      PI_UNREF(item->pi, poll_obj_string(item_type));
     }
     item->pi = pi_new;
   }
@@ -1541,7 +1526,7 @@ retry:
   if (bag->pi != pi_new) {
     PI_ADD_REF(pi_new, poll_obj_string(bag_type));
     if (bag->pi != nullptr) {
-      PI_UNREF(exec_ctx, bag->pi, poll_obj_string(bag_type));
+      PI_UNREF(bag->pi, poll_obj_string(bag_type));
     }
     bag->pi = pi_new;
   }
@@ -1553,10 +1538,8 @@ retry:
   GPR_TIMER_END("add_poll_object", 0);
 }
 
-static void pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_fd* fd) {
-  add_poll_object(exec_ctx, &pollset->po, POLL_OBJ_POLLSET, &fd->po,
-                  POLL_OBJ_FD);
+static void pollset_add_fd(grpc_pollset* pollset, grpc_fd* fd) {
+  add_poll_object(&pollset->po, POLL_OBJ_POLLSET, &fd->po, POLL_OBJ_FD);
 }
 
 /*******************************************************************************
@@ -1573,48 +1556,39 @@ static grpc_pollset_set* pollset_set_create(void) {
   return pss;
 }
 
-static void pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_pollset_set* pss) {
+static void pollset_set_destroy(grpc_pollset_set* pss) {
   gpr_mu_destroy(&pss->po.mu);
 
   if (pss->po.pi != nullptr) {
-    PI_UNREF(exec_ctx, pss->po.pi, "pss_destroy");
+    PI_UNREF(pss->po.pi, "pss_destroy");
   }
 
   gpr_free(pss);
 }
 
-static void pollset_set_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
-                               grpc_fd* fd) {
-  add_poll_object(exec_ctx, &pss->po, POLL_OBJ_POLLSET_SET, &fd->po,
-                  POLL_OBJ_FD);
+static void pollset_set_add_fd(grpc_pollset_set* pss, grpc_fd* fd) {
+  add_poll_object(&pss->po, POLL_OBJ_POLLSET_SET, &fd->po, POLL_OBJ_FD);
 }
 
-static void pollset_set_del_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
-                               grpc_fd* fd) {
+static void pollset_set_del_fd(grpc_pollset_set* pss, grpc_fd* fd) {
   /* Nothing to do */
 }
 
-static void pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pss, grpc_pollset* ps) {
-  add_poll_object(exec_ctx, &pss->po, POLL_OBJ_POLLSET_SET, &ps->po,
-                  POLL_OBJ_POLLSET);
+static void pollset_set_add_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {
+  add_poll_object(&pss->po, POLL_OBJ_POLLSET_SET, &ps->po, POLL_OBJ_POLLSET);
 }
 
-static void pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pss, grpc_pollset* ps) {
+static void pollset_set_del_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {
   /* Nothing to do */
 }
 
-static void pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {
-  add_poll_object(exec_ctx, &bag->po, POLL_OBJ_POLLSET_SET, &item->po,
+  add_poll_object(&bag->po, POLL_OBJ_POLLSET_SET, &item->po,
                   POLL_OBJ_POLLSET_SET);
 }
 
-static void pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {
   /* Nothing to do */
 }
@@ -1760,7 +1734,7 @@ const grpc_event_engine_vtable* grpc_init_epollsig_linux(
     bool explicit_request) {
   gpr_log(GPR_ERROR,
           "Skipping epollsig becuase GRPC_LINUX_EPOLL is not defined.");
-  return NULL;
+  return nullptr;
 }
 #endif /* defined(GRPC_POSIX_SOCKET) */
 
diff --git a/src/core/lib/iomgr/ev_poll_posix.cc b/src/core/lib/iomgr/ev_poll_posix.cc
index 8659559f78..53de94fb6e 100644
--- a/src/core/lib/iomgr/ev_poll_posix.cc
+++ b/src/core/lib/iomgr/ev_poll_posix.cc
@@ -128,8 +128,7 @@ static uint32_t fd_begin_poll(grpc_fd* fd, grpc_pollset* pollset,
    MUST NOT be called with a pollset lock taken
    if got_read or got_write are 1, also does the become_{readable,writable} as
    appropriate. */
-static void fd_end_poll(grpc_exec_ctx* exec_ctx, grpc_fd_watcher* rec,
-                        int got_read, int got_write,
+static void fd_end_poll(grpc_fd_watcher* rec, int got_read, int got_write,
                         grpc_pollset* read_notifier_pollset);
 
 /* Return 1 if this fd is orphaned, 0 otherwise */
@@ -186,11 +185,9 @@ struct grpc_pollset {
 };
 
 /* Add an fd to a pollset */
-static void pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           struct grpc_fd* fd);
+static void pollset_add_fd(grpc_pollset* pollset, struct grpc_fd* fd);
 
-static void pollset_set_add_fd(grpc_exec_ctx* exec_ctx,
-                               grpc_pollset_set* pollset_set, grpc_fd* fd);
+static void pollset_set_add_fd(grpc_pollset_set* pollset_set, grpc_fd* fd);
 
 /* Convert a timespec to milliseconds:
    - very small or negative poll times are clamped to zero to do a
@@ -199,8 +196,7 @@ static void pollset_set_add_fd(grpc_exec_ctx* exec_ctx,
    - longer than a millisecond polls are rounded up to the next nearest
      millisecond to avoid spinning
    - infinite timeouts are converted to -1 */
-static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
-                                           grpc_millis deadline);
+static int poll_deadline_to_millis_timeout(grpc_millis deadline);
 
 /* Allow kick to wakeup the currently polling worker */
 #define GRPC_POLLSET_CAN_KICK_SELF 1
@@ -208,7 +204,7 @@ static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
 #define GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP 2
 /* As per pollset_kick, with an extended set of flags (defined above)
    -- mostly for fd_posix's use. */
-static grpc_error* pollset_kick_ext(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
+static grpc_error* pollset_kick_ext(grpc_pollset* p,
                                     grpc_pollset_worker* specific_worker,
                                     uint32_t flags) GRPC_MUST_USE_RESULT;
 
@@ -353,8 +349,7 @@ static bool fd_is_orphaned(grpc_fd* fd) {
 }
 
 /* Return the read-notifier pollset */
-static grpc_pollset* fd_get_read_notifier_pollset(grpc_exec_ctx* exec_ctx,
-                                                  grpc_fd* fd) {
+static grpc_pollset* fd_get_read_notifier_pollset(grpc_fd* fd) {
   grpc_pollset* notifier = nullptr;
 
   gpr_mu_lock(&fd->mu);
@@ -364,39 +359,36 @@ static grpc_pollset* fd_get_read_notifier_pollset(grpc_exec_ctx* exec_ctx,
   return notifier;
 }
 
-static grpc_error* pollset_kick_locked(grpc_exec_ctx* exec_ctx,
-                                       grpc_fd_watcher* watcher) {
+static grpc_error* pollset_kick_locked(grpc_fd_watcher* watcher) {
   gpr_mu_lock(&watcher->pollset->mu);
   GPR_ASSERT(watcher->worker);
-  grpc_error* err =
-      pollset_kick_ext(exec_ctx, watcher->pollset, watcher->worker,
-                       GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
+  grpc_error* err = pollset_kick_ext(watcher->pollset, watcher->worker,
+                                     GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
   gpr_mu_unlock(&watcher->pollset->mu);
   return err;
 }
 
-static void maybe_wake_one_watcher_locked(grpc_exec_ctx* exec_ctx,
-                                          grpc_fd* fd) {
+static void maybe_wake_one_watcher_locked(grpc_fd* fd) {
   if (fd->inactive_watcher_root.next != &fd->inactive_watcher_root) {
-    pollset_kick_locked(exec_ctx, fd->inactive_watcher_root.next);
+    pollset_kick_locked(fd->inactive_watcher_root.next);
   } else if (fd->read_watcher) {
-    pollset_kick_locked(exec_ctx, fd->read_watcher);
+    pollset_kick_locked(fd->read_watcher);
   } else if (fd->write_watcher) {
-    pollset_kick_locked(exec_ctx, fd->write_watcher);
+    pollset_kick_locked(fd->write_watcher);
   }
 }
 
-static void wake_all_watchers_locked(grpc_exec_ctx* exec_ctx, grpc_fd* fd) {
+static void wake_all_watchers_locked(grpc_fd* fd) {
   grpc_fd_watcher* watcher;
   for (watcher = fd->inactive_watcher_root.next;
        watcher != &fd->inactive_watcher_root; watcher = watcher->next) {
-    pollset_kick_locked(exec_ctx, watcher);
+    pollset_kick_locked(watcher);
   }
   if (fd->read_watcher) {
-    pollset_kick_locked(exec_ctx, fd->read_watcher);
+    pollset_kick_locked(fd->read_watcher);
   }
   if (fd->write_watcher && fd->write_watcher != fd->read_watcher) {
-    pollset_kick_locked(exec_ctx, fd->write_watcher);
+    pollset_kick_locked(fd->write_watcher);
   }
 }
 
@@ -405,12 +397,12 @@ static int has_watchers(grpc_fd* fd) {
          fd->inactive_watcher_root.next != &fd->inactive_watcher_root;
 }
 
-static void close_fd_locked(grpc_exec_ctx* exec_ctx, grpc_fd* fd) {
+static void close_fd_locked(grpc_fd* fd) {
   fd->closed = 1;
   if (!fd->released) {
     close(fd->fd);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, fd->on_done_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(fd->on_done_closure, GRPC_ERROR_NONE);
 }
 
 static int fd_wrapped_fd(grpc_fd* fd) {
@@ -421,8 +413,7 @@ static int fd_wrapped_fd(grpc_fd* fd) {
   }
 }
 
-static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                      grpc_closure* on_done, int* release_fd,
+static void fd_orphan(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
                       bool already_closed, const char* reason) {
   fd->on_done_closure = on_done;
   fd->released = release_fd != nullptr;
@@ -435,9 +426,9 @@ static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
   gpr_mu_lock(&fd->mu);
   REF_BY(fd, 1, reason); /* remove active status, but keep referenced */
   if (!has_watchers(fd)) {
-    close_fd_locked(exec_ctx, fd);
+    close_fd_locked(fd);
   } else {
-    wake_all_watchers_locked(exec_ctx, fd);
+    wake_all_watchers_locked(fd);
   }
   gpr_mu_unlock(&fd->mu);
   UNREF_BY(fd, 2, reason); /* drop the reference */
@@ -469,10 +460,10 @@ static grpc_error* fd_shutdown_error(grpc_fd* fd) {
   }
 }
 
-static void notify_on_locked(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                             grpc_closure** st, grpc_closure* closure) {
+static void notify_on_locked(grpc_fd* fd, grpc_closure** st,
+                             grpc_closure* closure) {
   if (fd->shutdown) {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure,
+    GRPC_CLOSURE_SCHED(closure,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING("FD shutdown"));
   } else if (*st == CLOSURE_NOT_READY) {
     /* not ready ==> switch to a waiting state by setting the closure */
@@ -480,8 +471,8 @@ static void notify_on_locked(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
   } else if (*st == CLOSURE_READY) {
     /* already ready ==> queue the closure to run immediately */
     *st = CLOSURE_NOT_READY;
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, fd_shutdown_error(fd));
-    maybe_wake_one_watcher_locked(exec_ctx, fd);
+    GRPC_CLOSURE_SCHED(closure, fd_shutdown_error(fd));
+    maybe_wake_one_watcher_locked(fd);
   } else {
     /* upcallptr was set to a different closure.  This is an error! */
     gpr_log(GPR_ERROR,
@@ -492,8 +483,7 @@ static void notify_on_locked(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
 }
 
 /* returns 1 if state becomes not ready */
-static int set_ready_locked(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                            grpc_closure** st) {
+static int set_ready_locked(grpc_fd* fd, grpc_closure** st) {
   if (*st == CLOSURE_READY) {
     /* duplicate ready ==> ignore */
     return 0;
@@ -503,18 +493,18 @@ static int set_ready_locked(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
     return 0;
   } else {
     /* waiting ==> queue closure */
-    GRPC_CLOSURE_SCHED(exec_ctx, *st, fd_shutdown_error(fd));
+    GRPC_CLOSURE_SCHED(*st, fd_shutdown_error(fd));
     *st = CLOSURE_NOT_READY;
     return 1;
   }
 }
 
 static void set_read_notifier_pollset_locked(
-    grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_pollset* read_notifier_pollset) {
+    grpc_fd* fd, grpc_pollset* read_notifier_pollset) {
   fd->read_notifier_pollset = read_notifier_pollset;
 }
 
-static void fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why) {
+static void fd_shutdown(grpc_fd* fd, grpc_error* why) {
   gpr_mu_lock(&fd->mu);
   /* only shutdown once */
   if (!fd->shutdown) {
@@ -522,8 +512,8 @@ static void fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why) {
     fd->shutdown_error = why;
     /* signal read/write closed to OS so that future operations fail */
     shutdown(fd->fd, SHUT_RDWR);
-    set_ready_locked(exec_ctx, fd, &fd->read_closure);
-    set_ready_locked(exec_ctx, fd, &fd->write_closure);
+    set_ready_locked(fd, &fd->read_closure);
+    set_ready_locked(fd, &fd->write_closure);
   } else {
     GRPC_ERROR_UNREF(why);
   }
@@ -537,17 +527,15 @@ static bool fd_is_shutdown(grpc_fd* fd) {
   return r;
 }
 
-static void fd_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                              grpc_closure* closure) {
+static void fd_notify_on_read(grpc_fd* fd, grpc_closure* closure) {
   gpr_mu_lock(&fd->mu);
-  notify_on_locked(exec_ctx, fd, &fd->read_closure, closure);
+  notify_on_locked(fd, &fd->read_closure, closure);
   gpr_mu_unlock(&fd->mu);
 }
 
-static void fd_notify_on_write(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_closure* closure) {
+static void fd_notify_on_write(grpc_fd* fd, grpc_closure* closure) {
   gpr_mu_lock(&fd->mu);
-  notify_on_locked(exec_ctx, fd, &fd->write_closure, closure);
+  notify_on_locked(fd, &fd->write_closure, closure);
   gpr_mu_unlock(&fd->mu);
 }
 
@@ -602,8 +590,7 @@ static uint32_t fd_begin_poll(grpc_fd* fd, grpc_pollset* pollset,
   return mask;
 }
 
-static void fd_end_poll(grpc_exec_ctx* exec_ctx, grpc_fd_watcher* watcher,
-                        int got_read, int got_write,
+static void fd_end_poll(grpc_fd_watcher* watcher, int got_read, int got_write,
                         grpc_pollset* read_notifier_pollset) {
   int was_polling = 0;
   int kick = 0;
@@ -637,23 +624,23 @@ static void fd_end_poll(grpc_exec_ctx* exec_ctx, grpc_fd_watcher* watcher,
     watcher->prev->next = watcher->next;
   }
   if (got_read) {
-    if (set_ready_locked(exec_ctx, fd, &fd->read_closure)) {
+    if (set_ready_locked(fd, &fd->read_closure)) {
       kick = 1;
     }
     if (read_notifier_pollset != nullptr) {
-      set_read_notifier_pollset_locked(exec_ctx, fd, read_notifier_pollset);
+      set_read_notifier_pollset_locked(fd, read_notifier_pollset);
     }
   }
   if (got_write) {
-    if (set_ready_locked(exec_ctx, fd, &fd->write_closure)) {
+    if (set_ready_locked(fd, &fd->write_closure)) {
       kick = 1;
     }
   }
   if (kick) {
-    maybe_wake_one_watcher_locked(exec_ctx, fd);
+    maybe_wake_one_watcher_locked(fd);
   }
   if (fd_is_orphaned(fd) && !has_watchers(fd) && !fd->closed) {
-    close_fd_locked(exec_ctx, fd);
+    close_fd_locked(fd);
   }
   gpr_mu_unlock(&fd->mu);
 
@@ -714,12 +701,12 @@ static void kick_append_error(grpc_error** composite, grpc_error* error) {
   *composite = grpc_error_add_child(*composite, error);
 }
 
-static grpc_error* pollset_kick_ext(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
+static grpc_error* pollset_kick_ext(grpc_pollset* p,
                                     grpc_pollset_worker* specific_worker,
                                     uint32_t flags) {
   GPR_TIMER_BEGIN("pollset_kick_ext", 0);
   grpc_error* error = GRPC_ERROR_NONE;
-  GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
+  GRPC_STATS_INC_POLLSET_KICK();
 
   /* pollset->mu already held */
   if (specific_worker != nullptr) {
@@ -785,9 +772,9 @@ static grpc_error* pollset_kick_ext(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
   return error;
 }
 
-static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
+static grpc_error* pollset_kick(grpc_pollset* p,
                                 grpc_pollset_worker* specific_worker) {
-  return pollset_kick_ext(exec_ctx, p, specific_worker, 0);
+  return pollset_kick_ext(p, specific_worker, 0);
 }
 
 /* global state management */
@@ -821,7 +808,7 @@ static void pollset_init(grpc_pollset* pollset, gpr_mu** mu) {
   pollset->pollset_set_count = 0;
 }
 
-static void pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
+static void pollset_destroy(grpc_pollset* pollset) {
   GPR_ASSERT(!pollset_has_workers(pollset));
   GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
   while (pollset->local_wakeup_cache) {
@@ -834,8 +821,7 @@ static void pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
   gpr_mu_destroy(&pollset->mu);
 }
 
-static void pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_fd* fd) {
+static void pollset_add_fd(grpc_pollset* pollset, grpc_fd* fd) {
   gpr_mu_lock(&pollset->mu);
   size_t i;
   /* TODO(ctiller): this is O(num_fds^2); maybe switch to a hash set here */
@@ -850,19 +836,19 @@ static void pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
   }
   pollset->fds[pollset->fd_count++] = fd;
   GRPC_FD_REF(fd, "multipoller");
-  pollset_kick(exec_ctx, pollset, nullptr);
+  pollset_kick(pollset, nullptr);
 exit:
   gpr_mu_unlock(&pollset->mu);
 }
 
-static void finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
+static void finish_shutdown(grpc_pollset* pollset) {
   GPR_ASSERT(grpc_closure_list_empty(pollset->idle_jobs));
   size_t i;
   for (i = 0; i < pollset->fd_count; i++) {
     GRPC_FD_UNREF(pollset->fds[i], "multipoller");
   }
   pollset->fd_count = 0;
-  GRPC_CLOSURE_SCHED(exec_ctx, pollset->shutdown_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(pollset->shutdown_done, GRPC_ERROR_NONE);
 }
 
 static void work_combine_error(grpc_error** composite, grpc_error* error) {
@@ -873,7 +859,7 @@ static void work_combine_error(grpc_error** composite, grpc_error* error) {
   *composite = grpc_error_add_child(*composite, error);
 }
 
-static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+static grpc_error* pollset_work(grpc_pollset* pollset,
                                 grpc_pollset_worker** worker_hdl,
                                 grpc_millis deadline) {
   grpc_pollset_worker worker;
@@ -912,7 +898,7 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
   if (!pollset_has_workers(pollset) &&
       !grpc_closure_list_empty(pollset->idle_jobs)) {
     GPR_TIMER_MARK("pollset_work.idle_jobs", 0);
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pollset->idle_jobs);
+    GRPC_CLOSURE_LIST_SCHED(&pollset->idle_jobs);
     goto done;
   }
   /* If we're shutting down then we don't execute any extended work */
@@ -944,7 +930,7 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
       grpc_fd_watcher* watchers;
       struct pollfd* pfds;
 
-      timeout = poll_deadline_to_millis_timeout(exec_ctx, deadline);
+      timeout = poll_deadline_to_millis_timeout(deadline);
 
       if (pollset->fd_count + 2 <= inline_elements) {
         pfds = pollfd_space;
@@ -988,9 +974,9 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
       /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
          even going into the blocking annotation if possible */
       GRPC_SCHEDULING_START_BLOCKING_REGION;
-      GRPC_STATS_INC_SYSCALL_POLL(exec_ctx);
+      GRPC_STATS_INC_SYSCALL_POLL();
       r = grpc_poll_function(pfds, pfd_count, timeout);
-      GRPC_SCHEDULING_END_BLOCKING_REGION_WITH_EXEC_CTX(exec_ctx);
+      GRPC_SCHEDULING_END_BLOCKING_REGION;
 
       if (grpc_polling_trace.enabled()) {
         gpr_log(GPR_DEBUG, "%p poll=%d", pollset, r);
@@ -1003,16 +989,16 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
 
         for (i = 1; i < pfd_count; i++) {
           if (watchers[i].fd == nullptr) {
-            fd_end_poll(exec_ctx, &watchers[i], 0, 0, nullptr);
+            fd_end_poll(&watchers[i], 0, 0, nullptr);
           } else {
             // Wake up all the file descriptors, if we have an invalid one
             // we can identify it on the next pollset_work()
-            fd_end_poll(exec_ctx, &watchers[i], 1, 1, pollset);
+            fd_end_poll(&watchers[i], 1, 1, pollset);
           }
         }
       } else if (r == 0) {
         for (i = 1; i < pfd_count; i++) {
-          fd_end_poll(exec_ctx, &watchers[i], 0, 0, nullptr);
+          fd_end_poll(&watchers[i], 0, 0, nullptr);
         }
       } else {
         if (pfds[0].revents & POLLIN_CHECK) {
@@ -1024,14 +1010,14 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
         }
         for (i = 1; i < pfd_count; i++) {
           if (watchers[i].fd == nullptr) {
-            fd_end_poll(exec_ctx, &watchers[i], 0, 0, nullptr);
+            fd_end_poll(&watchers[i], 0, 0, nullptr);
           } else {
             if (grpc_polling_trace.enabled()) {
               gpr_log(GPR_DEBUG, "%p got_event: %d r:%d w:%d [%d]", pollset,
                       pfds[i].fd, (pfds[i].revents & POLLIN_CHECK) != 0,
                       (pfds[i].revents & POLLOUT_CHECK) != 0, pfds[i].revents);
             }
-            fd_end_poll(exec_ctx, &watchers[i], pfds[i].revents & POLLIN_CHECK,
+            fd_end_poll(&watchers[i], pfds[i].revents & POLLIN_CHECK,
                         pfds[i].revents & POLLOUT_CHECK, pollset);
           }
         }
@@ -1054,7 +1040,7 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
      worker list, which means nobody could ask us to re-evaluate polling). */
   done:
     if (!locked) {
-      queued_work |= grpc_exec_ctx_flush(exec_ctx);
+      queued_work |= grpc_core::ExecCtx::Get()->Flush();
       gpr_mu_lock(&pollset->mu);
       locked = 1;
     }
@@ -1083,21 +1069,21 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
   /* check shutdown conditions */
   if (pollset->shutting_down) {
     if (pollset_has_workers(pollset)) {
-      pollset_kick(exec_ctx, pollset, nullptr);
+      pollset_kick(pollset, nullptr);
     } else if (!pollset->called_shutdown && !pollset_has_observers(pollset)) {
       pollset->called_shutdown = 1;
       gpr_mu_unlock(&pollset->mu);
-      finish_shutdown(exec_ctx, pollset);
-      grpc_exec_ctx_flush(exec_ctx);
+      finish_shutdown(pollset);
+      grpc_core::ExecCtx::Get()->Flush();
       /* Continuing to access pollset here is safe -- it is the caller's
        * responsibility to not destroy when it has outstanding calls to
        * pollset_work.
        * TODO(dklempner): Can we refactor the shutdown logic to avoid this? */
       gpr_mu_lock(&pollset->mu);
     } else if (!grpc_closure_list_empty(pollset->idle_jobs)) {
-      GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pollset->idle_jobs);
+      GRPC_CLOSURE_LIST_SCHED(&pollset->idle_jobs);
       gpr_mu_unlock(&pollset->mu);
-      grpc_exec_ctx_flush(exec_ctx);
+      grpc_core::ExecCtx::Get()->Flush();
       gpr_mu_lock(&pollset->mu);
     }
   }
@@ -1107,26 +1093,24 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
   return error;
 }
 
-static void pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                             grpc_closure* closure) {
+static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
   GPR_ASSERT(!pollset->shutting_down);
   pollset->shutting_down = 1;
   pollset->shutdown_done = closure;
-  pollset_kick(exec_ctx, pollset, GRPC_POLLSET_KICK_BROADCAST);
+  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
   if (!pollset_has_workers(pollset)) {
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pollset->idle_jobs);
+    GRPC_CLOSURE_LIST_SCHED(&pollset->idle_jobs);
   }
   if (!pollset->called_shutdown && !pollset_has_observers(pollset)) {
     pollset->called_shutdown = 1;
-    finish_shutdown(exec_ctx, pollset);
+    finish_shutdown(pollset);
   }
 }
 
-static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
-                                           grpc_millis deadline) {
+static int poll_deadline_to_millis_timeout(grpc_millis deadline) {
   if (deadline == GRPC_MILLIS_INF_FUTURE) return -1;
   if (deadline == 0) return 0;
-  grpc_millis n = deadline - grpc_exec_ctx_now(exec_ctx);
+  grpc_millis n = deadline - grpc_core::ExecCtx::Get()->Now();
   if (n < 0) return 0;
   if (n > INT_MAX) return -1;
   return (int)n;
@@ -1143,8 +1127,7 @@ static grpc_pollset_set* pollset_set_create(void) {
   return pollset_set;
 }
 
-static void pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_pollset_set* pollset_set) {
+static void pollset_set_destroy(grpc_pollset_set* pollset_set) {
   size_t i;
   gpr_mu_destroy(&pollset_set->mu);
   for (i = 0; i < pollset_set->fd_count; i++) {
@@ -1159,7 +1142,7 @@ static void pollset_set_destroy(grpc_exec_ctx* exec_ctx,
         !pollset_has_observers(pollset)) {
       pollset->called_shutdown = 1;
       gpr_mu_unlock(&pollset->mu);
-      finish_shutdown(exec_ctx, pollset);
+      finish_shutdown(pollset);
     } else {
       gpr_mu_unlock(&pollset->mu);
     }
@@ -1170,8 +1153,7 @@ static void pollset_set_destroy(grpc_exec_ctx* exec_ctx,
   gpr_free(pollset_set);
 }
 
-static void pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pollset_set,
+static void pollset_set_add_pollset(grpc_pollset_set* pollset_set,
                                     grpc_pollset* pollset) {
   size_t i, j;
   gpr_mu_lock(&pollset->mu);
@@ -1190,7 +1172,7 @@ static void pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
     if (fd_is_orphaned(pollset_set->fds[i])) {
       GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
     } else {
-      pollset_add_fd(exec_ctx, pollset, pollset_set->fds[i]);
+      pollset_add_fd(pollset, pollset_set->fds[i]);
       pollset_set->fds[j++] = pollset_set->fds[i];
     }
   }
@@ -1198,8 +1180,7 @@ static void pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
   gpr_mu_unlock(&pollset_set->mu);
 }
 
-static void pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pollset_set,
+static void pollset_set_del_pollset(grpc_pollset_set* pollset_set,
                                     grpc_pollset* pollset) {
   size_t i;
   gpr_mu_lock(&pollset_set->mu);
@@ -1219,14 +1200,13 @@ static void pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
       !pollset_has_observers(pollset)) {
     pollset->called_shutdown = 1;
     gpr_mu_unlock(&pollset->mu);
-    finish_shutdown(exec_ctx, pollset);
+    finish_shutdown(pollset);
   } else {
     gpr_mu_unlock(&pollset->mu);
   }
 }
 
-static void pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {
   size_t i, j;
   gpr_mu_lock(&bag->mu);
@@ -1241,7 +1221,7 @@ static void pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
     if (fd_is_orphaned(bag->fds[i])) {
       GRPC_FD_UNREF(bag->fds[i], "pollset_set");
     } else {
-      pollset_set_add_fd(exec_ctx, item, bag->fds[i]);
+      pollset_set_add_fd(item, bag->fds[i]);
       bag->fds[j++] = bag->fds[i];
     }
   }
@@ -1249,8 +1229,7 @@ static void pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
   gpr_mu_unlock(&bag->mu);
 }
 
-static void pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {
   size_t i;
   gpr_mu_lock(&bag->mu);
@@ -1265,8 +1244,7 @@ static void pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
   gpr_mu_unlock(&bag->mu);
 }
 
-static void pollset_set_add_fd(grpc_exec_ctx* exec_ctx,
-                               grpc_pollset_set* pollset_set, grpc_fd* fd) {
+static void pollset_set_add_fd(grpc_pollset_set* pollset_set, grpc_fd* fd) {
   size_t i;
   gpr_mu_lock(&pollset_set->mu);
   if (pollset_set->fd_count == pollset_set->fd_capacity) {
@@ -1277,16 +1255,15 @@ static void pollset_set_add_fd(grpc_exec_ctx* exec_ctx,
   GRPC_FD_REF(fd, "pollset_set");
   pollset_set->fds[pollset_set->fd_count++] = fd;
   for (i = 0; i < pollset_set->pollset_count; i++) {
-    pollset_add_fd(exec_ctx, pollset_set->pollsets[i], fd);
+    pollset_add_fd(pollset_set->pollsets[i], fd);
   }
   for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    pollset_set_add_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+    pollset_set_add_fd(pollset_set->pollset_sets[i], fd);
   }
   gpr_mu_unlock(&pollset_set->mu);
 }
 
-static void pollset_set_del_fd(grpc_exec_ctx* exec_ctx,
-                               grpc_pollset_set* pollset_set, grpc_fd* fd) {
+static void pollset_set_del_fd(grpc_pollset_set* pollset_set, grpc_fd* fd) {
   size_t i;
   gpr_mu_lock(&pollset_set->mu);
   for (i = 0; i < pollset_set->fd_count; i++) {
@@ -1299,7 +1276,7 @@ static void pollset_set_del_fd(grpc_exec_ctx* exec_ctx,
     }
   }
   for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    pollset_set_del_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+    pollset_set_del_fd(pollset_set->pollset_sets[i], fd);
   }
   gpr_mu_unlock(&pollset_set->mu);
 }
@@ -1382,7 +1359,7 @@ static poll_args* get_poller_locked(struct pollfd* fds, nfds_t count) {
   gpr_thd_options opt = gpr_thd_options_default();
   gpr_ref(&g_cvfds.pollcount);
   gpr_thd_options_set_detached(&opt);
-  GPR_ASSERT(gpr_thd_new(&t_id, &run_poll, pargs, &opt));
+  GPR_ASSERT(gpr_thd_new(&t_id, "grpc_poller", &run_poll, pargs, &opt));
   return pargs;
 }
 
@@ -1494,7 +1471,7 @@ static void run_poll(void* args) {
       decref_poll_result(result);
       // Leave this polling thread alive for a grace period to do another poll()
       // op
-      gpr_timespec deadline = gpr_now(GPR_CLOCK_REALTIME);
+      gpr_timespec deadline = gpr_now(GPR_CLOCK_MONOTONIC);
       deadline = gpr_time_add(deadline, thread_grace);
       pargs->trigger_set = 0;
       gpr_cv_wait(&pargs->trigger, &g_cvfds.mu, deadline);
@@ -1549,9 +1526,9 @@ static int cvfd_poll(struct pollfd* fds, nfds_t nfds, int timeout) {
     }
   }
 
-  gpr_timespec deadline = gpr_now(GPR_CLOCK_REALTIME);
+  gpr_timespec deadline = gpr_now(GPR_CLOCK_MONOTONIC);
   if (timeout < 0) {
-    deadline = gpr_inf_future(GPR_CLOCK_REALTIME);
+    deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
   } else {
     deadline =
         gpr_time_add(deadline, gpr_time_from_millis(timeout, GPR_TIMESPAN));
@@ -1654,7 +1631,7 @@ static void global_cv_fd_table_shutdown() {
   // Not doing so will result in reported memory leaks
   if (!gpr_unref(&g_cvfds.pollcount)) {
     int res = gpr_cv_wait(&g_cvfds.shutdown_cv, &g_cvfds.mu,
-                          gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+                          gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
                                        gpr_time_from_seconds(3, GPR_TIMESPAN)));
     GPR_ASSERT(res == 0);
   }
diff --git a/src/core/lib/iomgr/ev_posix.cc b/src/core/lib/iomgr/ev_posix.cc
index 031c97564a..b516f93058 100644
--- a/src/core/lib/iomgr/ev_posix.cc
+++ b/src/core/lib/iomgr/ev_posix.cc
@@ -46,7 +46,7 @@ grpc_poll_function_type grpc_poll_function = poll;
 
 grpc_wakeup_fd grpc_global_wakeup_fd;
 
-static const grpc_event_engine_vtable* g_event_engine;
+static const grpc_event_engine_vtable* g_event_engine = nullptr;
 static const char* g_poll_strategy_name = nullptr;
 
 typedef const grpc_event_engine_vtable* (*event_engine_factory_fn)(
@@ -184,28 +184,25 @@ int grpc_fd_wrapped_fd(grpc_fd* fd) {
   return g_event_engine->fd_wrapped_fd(fd);
 }
 
-void grpc_fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_closure* on_done,
-                    int* release_fd, bool already_closed, const char* reason) {
-  g_event_engine->fd_orphan(exec_ctx, fd, on_done, release_fd, already_closed,
-                            reason);
+void grpc_fd_orphan(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
+                    bool already_closed, const char* reason) {
+  g_event_engine->fd_orphan(fd, on_done, release_fd, already_closed, reason);
 }
 
-void grpc_fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why) {
-  g_event_engine->fd_shutdown(exec_ctx, fd, why);
+void grpc_fd_shutdown(grpc_fd* fd, grpc_error* why) {
+  g_event_engine->fd_shutdown(fd, why);
 }
 
 bool grpc_fd_is_shutdown(grpc_fd* fd) {
   return g_event_engine->fd_is_shutdown(fd);
 }
 
-void grpc_fd_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                            grpc_closure* closure) {
-  g_event_engine->fd_notify_on_read(exec_ctx, fd, closure);
+void grpc_fd_notify_on_read(grpc_fd* fd, grpc_closure* closure) {
+  g_event_engine->fd_notify_on_read(fd, closure);
 }
 
-void grpc_fd_notify_on_write(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                             grpc_closure* closure) {
-  g_event_engine->fd_notify_on_write(exec_ctx, fd, closure);
+void grpc_fd_notify_on_write(grpc_fd* fd, grpc_closure* closure) {
+  g_event_engine->fd_notify_on_write(fd, closure);
 }
 
 size_t grpc_pollset_size(void) { return g_event_engine->pollset_size; }
@@ -214,72 +211,63 @@ void grpc_pollset_init(grpc_pollset* pollset, gpr_mu** mu) {
   g_event_engine->pollset_init(pollset, mu);
 }
 
-void grpc_pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_closure* closure) {
-  g_event_engine->pollset_shutdown(exec_ctx, pollset, closure);
+void grpc_pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
+  g_event_engine->pollset_shutdown(pollset, closure);
 }
 
-void grpc_pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
-  g_event_engine->pollset_destroy(exec_ctx, pollset);
+void grpc_pollset_destroy(grpc_pollset* pollset) {
+  g_event_engine->pollset_destroy(pollset);
 }
 
-grpc_error* grpc_pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_work(grpc_pollset* pollset,
                               grpc_pollset_worker** worker,
                               grpc_millis deadline) {
-  return g_event_engine->pollset_work(exec_ctx, pollset, worker, deadline);
+  return g_event_engine->pollset_work(pollset, worker, deadline);
 }
 
-grpc_error* grpc_pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_kick(grpc_pollset* pollset,
                               grpc_pollset_worker* specific_worker) {
-  return g_event_engine->pollset_kick(exec_ctx, pollset, specific_worker);
+  return g_event_engine->pollset_kick(pollset, specific_worker);
 }
 
-void grpc_pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                         struct grpc_fd* fd) {
-  g_event_engine->pollset_add_fd(exec_ctx, pollset, fd);
+void grpc_pollset_add_fd(grpc_pollset* pollset, struct grpc_fd* fd) {
+  g_event_engine->pollset_add_fd(pollset, fd);
 }
 
 grpc_pollset_set* grpc_pollset_set_create(void) {
   return g_event_engine->pollset_set_create();
 }
 
-void grpc_pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                              grpc_pollset_set* pollset_set) {
-  g_event_engine->pollset_set_destroy(exec_ctx, pollset_set);
+void grpc_pollset_set_destroy(grpc_pollset_set* pollset_set) {
+  g_event_engine->pollset_set_destroy(pollset_set);
 }
 
-void grpc_pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_add_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {
-  g_event_engine->pollset_set_add_pollset(exec_ctx, pollset_set, pollset);
+  g_event_engine->pollset_set_add_pollset(pollset_set, pollset);
 }
 
-void grpc_pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_del_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {
-  g_event_engine->pollset_set_del_pollset(exec_ctx, pollset_set, pollset);
+  g_event_engine->pollset_set_del_pollset(pollset_set, pollset);
 }
 
-void grpc_pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {
-  g_event_engine->pollset_set_add_pollset_set(exec_ctx, bag, item);
+  g_event_engine->pollset_set_add_pollset_set(bag, item);
 }
 
-void grpc_pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {
-  g_event_engine->pollset_set_del_pollset_set(exec_ctx, bag, item);
+  g_event_engine->pollset_set_del_pollset_set(bag, item);
 }
 
-void grpc_pollset_set_add_fd(grpc_exec_ctx* exec_ctx,
-                             grpc_pollset_set* pollset_set, grpc_fd* fd) {
-  g_event_engine->pollset_set_add_fd(exec_ctx, pollset_set, fd);
+void grpc_pollset_set_add_fd(grpc_pollset_set* pollset_set, grpc_fd* fd) {
+  g_event_engine->pollset_set_add_fd(pollset_set, fd);
 }
 
-void grpc_pollset_set_del_fd(grpc_exec_ctx* exec_ctx,
-                             grpc_pollset_set* pollset_set, grpc_fd* fd) {
-  g_event_engine->pollset_set_del_fd(exec_ctx, pollset_set, fd);
+void grpc_pollset_set_del_fd(grpc_pollset_set* pollset_set, grpc_fd* fd) {
+  g_event_engine->pollset_set_del_fd(pollset_set, fd);
 }
 
 #endif  // GRPC_POSIX_SOCKET
diff --git a/src/core/lib/iomgr/ev_posix.h b/src/core/lib/iomgr/ev_posix.h
index 16fa10ca56..62f1162a23 100644
--- a/src/core/lib/iomgr/ev_posix.h
+++ b/src/core/lib/iomgr/ev_posix.h
@@ -36,48 +36,36 @@ typedef struct grpc_event_engine_vtable {
 
   grpc_fd* (*fd_create)(int fd, const char* name);
   int (*fd_wrapped_fd)(grpc_fd* fd);
-  void (*fd_orphan)(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_closure* on_done,
-                    int* release_fd, bool already_closed, const char* reason);
-  void (*fd_shutdown)(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why);
-  void (*fd_notify_on_read)(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                            grpc_closure* closure);
-  void (*fd_notify_on_write)(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                             grpc_closure* closure);
+  void (*fd_orphan)(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
+                    bool already_closed, const char* reason);
+  void (*fd_shutdown)(grpc_fd* fd, grpc_error* why);
+  void (*fd_notify_on_read)(grpc_fd* fd, grpc_closure* closure);
+  void (*fd_notify_on_write)(grpc_fd* fd, grpc_closure* closure);
   bool (*fd_is_shutdown)(grpc_fd* fd);
-  grpc_pollset* (*fd_get_read_notifier_pollset)(grpc_exec_ctx* exec_ctx,
-                                                grpc_fd* fd);
+  grpc_pollset* (*fd_get_read_notifier_pollset)(grpc_fd* fd);
 
   void (*pollset_init)(grpc_pollset* pollset, gpr_mu** mu);
-  void (*pollset_shutdown)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_closure* closure);
-  void (*pollset_destroy)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset);
-  grpc_error* (*pollset_work)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+  void (*pollset_shutdown)(grpc_pollset* pollset, grpc_closure* closure);
+  void (*pollset_destroy)(grpc_pollset* pollset);
+  grpc_error* (*pollset_work)(grpc_pollset* pollset,
                               grpc_pollset_worker** worker,
                               grpc_millis deadline);
-  grpc_error* (*pollset_kick)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+  grpc_error* (*pollset_kick)(grpc_pollset* pollset,
                               grpc_pollset_worker* specific_worker);
-  void (*pollset_add_fd)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                         struct grpc_fd* fd);
+  void (*pollset_add_fd)(grpc_pollset* pollset, struct grpc_fd* fd);
 
   grpc_pollset_set* (*pollset_set_create)(void);
-  void (*pollset_set_destroy)(grpc_exec_ctx* exec_ctx,
-                              grpc_pollset_set* pollset_set);
-  void (*pollset_set_add_pollset)(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+  void (*pollset_set_destroy)(grpc_pollset_set* pollset_set);
+  void (*pollset_set_add_pollset)(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset);
-  void (*pollset_set_del_pollset)(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+  void (*pollset_set_del_pollset)(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset);
-  void (*pollset_set_add_pollset_set)(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+  void (*pollset_set_add_pollset_set)(grpc_pollset_set* bag,
                                       grpc_pollset_set* item);
-  void (*pollset_set_del_pollset_set)(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+  void (*pollset_set_del_pollset_set)(grpc_pollset_set* bag,
                                       grpc_pollset_set* item);
-  void (*pollset_set_add_fd)(grpc_exec_ctx* exec_ctx,
-                             grpc_pollset_set* pollset_set, grpc_fd* fd);
-  void (*pollset_set_del_fd)(grpc_exec_ctx* exec_ctx,
-                             grpc_pollset_set* pollset_set, grpc_fd* fd);
+  void (*pollset_set_add_fd)(grpc_pollset_set* pollset_set, grpc_fd* fd);
+  void (*pollset_set_del_fd)(grpc_pollset_set* pollset_set, grpc_fd* fd);
 
   void (*shutdown_engine)(void);
 } grpc_event_engine_vtable;
@@ -103,14 +91,14 @@ int grpc_fd_wrapped_fd(grpc_fd* fd);
    Requires: *fd initialized; no outstanding notify_on_read or
    notify_on_write.
    MUST NOT be called with a pollset lock taken */
-void grpc_fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_closure* on_done,
-                    int* release_fd, bool already_closed, const char* reason);
+void grpc_fd_orphan(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
+                    bool already_closed, const char* reason);
 
 /* Has grpc_fd_shutdown been called on an fd? */
 bool grpc_fd_is_shutdown(grpc_fd* fd);
 
 /* Cause any current and future callbacks to fail. */
-void grpc_fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why);
+void grpc_fd_shutdown(grpc_fd* fd, grpc_error* why);
 
 /* Register read interest, causing read_cb to be called once when fd becomes
    readable, on deadline specified by deadline, or on shutdown triggered by
@@ -125,29 +113,23 @@ void grpc_fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why);
    underlying platform. This means that users must drain fd in read_cb before
    calling notify_on_read again. Users are also expected to handle spurious
    events, i.e read_cb is called while nothing can be readable from fd  */
-void grpc_fd_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                            grpc_closure* closure);
+void grpc_fd_notify_on_read(grpc_fd* fd, grpc_closure* closure);
 
 /* Exactly the same semantics as above, except based on writable events.  */
-void grpc_fd_notify_on_write(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                             grpc_closure* closure);
+void grpc_fd_notify_on_write(grpc_fd* fd, grpc_closure* closure);
 
 /* Return the read notifier pollset from the fd */
-grpc_pollset* grpc_fd_get_read_notifier_pollset(grpc_exec_ctx* exec_ctx,
-                                                grpc_fd* fd);
+grpc_pollset* grpc_fd_get_read_notifier_pollset(grpc_fd* fd);
 
 /* pollset_posix functions */
 
 /* Add an fd to a pollset */
-void grpc_pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                         struct grpc_fd* fd);
+void grpc_pollset_add_fd(grpc_pollset* pollset, struct grpc_fd* fd);
 
 /* pollset_set_posix functions */
 
-void grpc_pollset_set_add_fd(grpc_exec_ctx* exec_ctx,
-                             grpc_pollset_set* pollset_set, grpc_fd* fd);
-void grpc_pollset_set_del_fd(grpc_exec_ctx* exec_ctx,
-                             grpc_pollset_set* pollset_set, grpc_fd* fd);
+void grpc_pollset_set_add_fd(grpc_pollset_set* pollset_set, grpc_fd* fd);
+void grpc_pollset_set_del_fd(grpc_pollset_set* pollset_set, grpc_fd* fd);
 
 /* override to allow tests to hook poll() usage */
 typedef int (*grpc_poll_function_type)(struct pollfd*, nfds_t, int);
diff --git a/src/core/lib/iomgr/exec_ctx.cc b/src/core/lib/iomgr/exec_ctx.cc
index 1777456342..e005437e0a 100644
--- a/src/core/lib/iomgr/exec_ctx.cc
+++ b/src/core/lib/iomgr/exec_ctx.cc
@@ -25,39 +25,7 @@
 #include "src/core/lib/iomgr/combiner.h"
 #include "src/core/lib/profiling/timers.h"
 
-bool grpc_exec_ctx_ready_to_finish(grpc_exec_ctx* exec_ctx) {
-  if ((exec_ctx->flags & GRPC_EXEC_CTX_FLAG_IS_FINISHED) == 0) {
-    if (exec_ctx->check_ready_to_finish(exec_ctx,
-                                        exec_ctx->check_ready_to_finish_arg)) {
-      exec_ctx->flags |= GRPC_EXEC_CTX_FLAG_IS_FINISHED;
-      return true;
-    }
-    return false;
-  } else {
-    return true;
-  }
-}
-
-bool grpc_never_ready_to_finish(grpc_exec_ctx* exec_ctx, void* arg_ignored) {
-  return false;
-}
-
-bool grpc_always_ready_to_finish(grpc_exec_ctx* exec_ctx, void* arg_ignored) {
-  return true;
-}
-
-bool grpc_exec_ctx_has_work(grpc_exec_ctx* exec_ctx) {
-  return exec_ctx->active_combiner != nullptr ||
-         !grpc_closure_list_empty(exec_ctx->closure_list);
-}
-
-void grpc_exec_ctx_finish(grpc_exec_ctx* exec_ctx) {
-  exec_ctx->flags |= GRPC_EXEC_CTX_FLAG_IS_FINISHED;
-  grpc_exec_ctx_flush(exec_ctx);
-}
-
-static void exec_ctx_run(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                         grpc_error* error) {
+static void exec_ctx_run(grpc_closure* closure, grpc_error* error) {
 #ifndef NDEBUG
   closure->scheduled = false;
   if (grpc_trace_closure.enabled()) {
@@ -67,7 +35,7 @@ static void exec_ctx_run(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
             closure->line_initiated);
   }
 #endif
-  closure->cb(exec_ctx, closure->cb_arg, error);
+  closure->cb(closure->cb_arg, error);
 #ifndef NDEBUG
   if (grpc_trace_closure.enabled()) {
     gpr_log(GPR_DEBUG, "closure %p finished", closure);
@@ -76,42 +44,13 @@ static void exec_ctx_run(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
   GRPC_ERROR_UNREF(error);
 }
 
-bool grpc_exec_ctx_flush(grpc_exec_ctx* exec_ctx) {
-  bool did_something = 0;
-  GPR_TIMER_BEGIN("grpc_exec_ctx_flush", 0);
-  for (;;) {
-    if (!grpc_closure_list_empty(exec_ctx->closure_list)) {
-      grpc_closure* c = exec_ctx->closure_list.head;
-      exec_ctx->closure_list.head = exec_ctx->closure_list.tail = nullptr;
-      while (c != nullptr) {
-        grpc_closure* next = c->next_data.next;
-        grpc_error* error = c->error_data.error;
-        did_something = true;
-        exec_ctx_run(exec_ctx, c, error);
-        c = next;
-      }
-    } else if (!grpc_combiner_continue_exec_ctx(exec_ctx)) {
-      break;
-    }
-  }
-  GPR_ASSERT(exec_ctx->active_combiner == nullptr);
-  GPR_TIMER_END("grpc_exec_ctx_flush", 0);
-  return did_something;
-}
-
-static void exec_ctx_sched(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                           grpc_error* error) {
-  grpc_closure_list_append(&exec_ctx->closure_list, closure, error);
+static void exec_ctx_sched(grpc_closure* closure, grpc_error* error) {
+  grpc_closure_list_append(grpc_core::ExecCtx::Get()->closure_list(), closure,
+                           error);
 }
 
 static gpr_timespec g_start_time;
 
-void grpc_exec_ctx_global_init(void) {
-  g_start_time = gpr_now(GPR_CLOCK_MONOTONIC);
-}
-
-void grpc_exec_ctx_global_shutdown(void) {}
-
 static gpr_atm timespec_to_atm_round_down(gpr_timespec ts) {
   ts = gpr_time_sub(ts, g_start_time);
   double x =
@@ -131,18 +70,6 @@ static gpr_atm timespec_to_atm_round_up(gpr_timespec ts) {
   return (gpr_atm)x;
 }
 
-grpc_millis grpc_exec_ctx_now(grpc_exec_ctx* exec_ctx) {
-  if (!exec_ctx->now_is_valid) {
-    exec_ctx->now = timespec_to_atm_round_down(gpr_now(GPR_CLOCK_MONOTONIC));
-    exec_ctx->now_is_valid = true;
-  }
-  return exec_ctx->now;
-}
-
-void grpc_exec_ctx_invalidate_now(grpc_exec_ctx* exec_ctx) {
-  exec_ctx->now_is_valid = false;
-}
-
 gpr_timespec grpc_millis_to_timespec(grpc_millis millis,
                                      gpr_clock_type clock_type) {
   // special-case infinities as grpc_millis can be 32bit on some platforms
@@ -175,3 +102,44 @@ static const grpc_closure_scheduler_vtable exec_ctx_scheduler_vtable = {
     exec_ctx_run, exec_ctx_sched, "exec_ctx"};
 static grpc_closure_scheduler exec_ctx_scheduler = {&exec_ctx_scheduler_vtable};
 grpc_closure_scheduler* grpc_schedule_on_exec_ctx = &exec_ctx_scheduler;
+
+namespace grpc_core {
+GPR_TLS_CLASS_DEF(ExecCtx::exec_ctx_);
+
+void ExecCtx::GlobalInit(void) {
+  g_start_time = gpr_now(GPR_CLOCK_MONOTONIC);
+  gpr_tls_init(&exec_ctx_);
+}
+
+bool ExecCtx::Flush() {
+  bool did_something = 0;
+  GPR_TIMER_BEGIN("grpc_exec_ctx_flush", 0);
+  for (;;) {
+    if (!grpc_closure_list_empty(closure_list_)) {
+      grpc_closure* c = closure_list_.head;
+      closure_list_.head = closure_list_.tail = nullptr;
+      while (c != nullptr) {
+        grpc_closure* next = c->next_data.next;
+        grpc_error* error = c->error_data.error;
+        did_something = true;
+        exec_ctx_run(c, error);
+        c = next;
+      }
+    } else if (!grpc_combiner_continue_exec_ctx()) {
+      break;
+    }
+  }
+  GPR_ASSERT(combiner_data_.active_combiner == nullptr);
+  GPR_TIMER_END("grpc_exec_ctx_flush", 0);
+  return did_something;
+}
+
+grpc_millis ExecCtx::Now() {
+  if (!now_is_valid_) {
+    now_ = timespec_to_atm_round_down(gpr_now(GPR_CLOCK_MONOTONIC));
+    now_is_valid_ = true;
+  }
+  return now_;
+}
+
+}  // namespace grpc_core
diff --git a/src/core/lib/iomgr/exec_ctx.h b/src/core/lib/iomgr/exec_ctx.h
index b415d2c255..8f8d518def 100644
--- a/src/core/lib/iomgr/exec_ctx.h
+++ b/src/core/lib/iomgr/exec_ctx.h
@@ -21,6 +21,8 @@
 
 #include <grpc/support/atm.h>
 #include <grpc/support/cpu.h>
+#include <grpc/support/log.h>
+#include <grpc/support/tls.h>
 
 #include "src/core/lib/iomgr/closure.h"
 
@@ -41,6 +43,13 @@ typedef struct grpc_combiner grpc_combiner;
    should be given to not delete said call/channel from this exec_ctx */
 #define GRPC_EXEC_CTX_FLAG_THREAD_RESOURCE_LOOP 2
 
+extern grpc_closure_scheduler* grpc_schedule_on_exec_ctx;
+
+gpr_timespec grpc_millis_to_timespec(grpc_millis millis, gpr_clock_type clock);
+grpc_millis grpc_timespec_to_millis_round_down(gpr_timespec timespec);
+grpc_millis grpc_timespec_to_millis_round_up(gpr_timespec timespec);
+
+namespace grpc_core {
 /** Execution context.
  *  A bag of data that collects information along a callstack.
  *  Generally created at public API entry points, and passed down as
@@ -61,63 +70,133 @@ typedef struct grpc_combiner grpc_combiner;
  *  - Instances are always passed as the first argument to a function that
  *    takes it, and always as a pointer (grpc_exec_ctx is never copied).
  */
-struct grpc_exec_ctx {
-  grpc_closure_list closure_list;
-  /** currently active combiner: updated only via combiner.c */
-  grpc_combiner* active_combiner;
-  /** last active combiner in the active combiner list */
-  grpc_combiner* last_combiner;
-  uintptr_t flags;
-  unsigned starting_cpu;
-  void* check_ready_to_finish_arg;
-  bool (*check_ready_to_finish)(grpc_exec_ctx* exec_ctx, void* arg);
-
-  bool now_is_valid;
-  grpc_millis now;
-};
+class ExecCtx {
+ public:
+  /** Default Constructor */
+
+  ExecCtx() : flags_(GRPC_EXEC_CTX_FLAG_IS_FINISHED) { Set(this); }
 
-/* initializer for grpc_exec_ctx:
-   prefer to use GRPC_EXEC_CTX_INIT whenever possible */
-#define GRPC_EXEC_CTX_INITIALIZER(flags, finish_check, finish_check_arg) \
-  {                                                                      \
-    GRPC_CLOSURE_LIST_INIT, NULL, NULL, flags, gpr_cpu_current_cpu(),    \
-        finish_check_arg, finish_check, false, 0                         \
+  /** Parameterised Constructor */
+  ExecCtx(uintptr_t fl) : flags_(fl) { Set(this); }
+
+  /** Destructor */
+  virtual ~ExecCtx() {
+    flags_ |= GRPC_EXEC_CTX_FLAG_IS_FINISHED;
+    Flush();
+    Set(last_exec_ctx_);
   }
 
-/* initialize an execution context at the top level of an API call into grpc
-   (this is safe to use elsewhere, though possibly not as efficient) */
-#define GRPC_EXEC_CTX_INIT \
-  GRPC_EXEC_CTX_INITIALIZER(GRPC_EXEC_CTX_FLAG_IS_FINISHED, NULL, NULL)
+  /** Disallow copy and assignment operators */
+  ExecCtx(const ExecCtx&) = delete;
+  ExecCtx& operator=(const ExecCtx&) = delete;
 
-extern grpc_closure_scheduler* grpc_schedule_on_exec_ctx;
+  /** Return starting_cpu */
+  unsigned starting_cpu() const { return starting_cpu_; }
 
-bool grpc_exec_ctx_has_work(grpc_exec_ctx* exec_ctx);
-
-/** Flush any work that has been enqueued onto this grpc_exec_ctx.
- *  Caller must guarantee that no interfering locks are held.
- *  Returns true if work was performed, false otherwise. */
-bool grpc_exec_ctx_flush(grpc_exec_ctx* exec_ctx);
-/** Finish any pending work for a grpc_exec_ctx. Must be called before
- *  the instance is destroyed, or work may be lost. */
-void grpc_exec_ctx_finish(grpc_exec_ctx* exec_ctx);
-/** Returns true if we'd like to leave this execution context as soon as
-    possible: useful for deciding whether to do something more or not depending
-    on outside context */
-bool grpc_exec_ctx_ready_to_finish(grpc_exec_ctx* exec_ctx);
-/** A finish check that is never ready to finish */
-bool grpc_never_ready_to_finish(grpc_exec_ctx* exec_ctx, void* arg_ignored);
-/** A finish check that is always ready to finish */
-bool grpc_always_ready_to_finish(grpc_exec_ctx* exec_ctx, void* arg_ignored);
-
-void grpc_exec_ctx_global_init(void);
-
-void grpc_exec_ctx_global_init(void);
-void grpc_exec_ctx_global_shutdown(void);
-
-grpc_millis grpc_exec_ctx_now(grpc_exec_ctx* exec_ctx);
-void grpc_exec_ctx_invalidate_now(grpc_exec_ctx* exec_ctx);
-gpr_timespec grpc_millis_to_timespec(grpc_millis millis, gpr_clock_type clock);
-grpc_millis grpc_timespec_to_millis_round_down(gpr_timespec timespec);
-grpc_millis grpc_timespec_to_millis_round_up(gpr_timespec timespec);
+  struct CombinerData {
+    /* currently active combiner: updated only via combiner.c */
+    grpc_combiner* active_combiner;
+    /* last active combiner in the active combiner list */
+    grpc_combiner* last_combiner;
+  };
+
+  /** Only to be used by grpc-combiner code */
+  CombinerData* combiner_data() { return &combiner_data_; }
+
+  /** Return pointer to grpc_closure_list */
+  grpc_closure_list* closure_list() { return &closure_list_; }
+
+  /** Return flags */
+  uintptr_t flags() { return flags_; }
+
+  /** Checks if there is work to be done */
+  bool HasWork() {
+    return combiner_data_.active_combiner != NULL ||
+           !grpc_closure_list_empty(closure_list_);
+  }
+
+  /** Flush any work that has been enqueued onto this grpc_exec_ctx.
+   *  Caller must guarantee that no interfering locks are held.
+   *  Returns true if work was performed, false otherwise. */
+  bool Flush();
+
+  /** Returns true if we'd like to leave this execution context as soon as
+possible: useful for deciding whether to do something more or not depending
+on outside context */
+  bool IsReadyToFinish() {
+    if ((flags_ & GRPC_EXEC_CTX_FLAG_IS_FINISHED) == 0) {
+      if (CheckReadyToFinish()) {
+        flags_ |= GRPC_EXEC_CTX_FLAG_IS_FINISHED;
+        return true;
+      }
+      return false;
+    } else {
+      return true;
+    }
+  }
+
+  /** Returns the stored current time relative to start if valid,
+   * otherwise refreshes the stored time, sets it valid and returns the new
+   * value */
+  grpc_millis Now();
+
+  /** Invalidates the stored time value. A new time value will be set on calling
+   * Now() */
+  void InvalidateNow() { now_is_valid_ = false; }
+
+  /** To be used only by shutdown code in iomgr */
+  void SetNowIomgrShutdown() {
+    now_ = GRPC_MILLIS_INF_FUTURE;
+    now_is_valid_ = true;
+  }
+
+  /** To be used only for testing.
+   * Sets the now value
+   */
+  void TestOnlySetNow(grpc_millis new_val) {
+    now_ = new_val;
+    now_is_valid_ = true;
+  }
+
+  /** Finish any pending work for a grpc_exec_ctx. Must be called before
+   *  the instance is destroyed, or work may be lost. */
+  void Finish();
+
+  /** Global initialization for ExecCtx. Called by iomgr */
+  static void GlobalInit(void);
+
+  /** Global shutdown for ExecCtx. Called by iomgr */
+  static void GlobalShutdown(void) { gpr_tls_destroy(&exec_ctx_); }
+
+  /** Gets pointer to current exec_ctx */
+  static ExecCtx* Get() {
+    return reinterpret_cast<ExecCtx*>(gpr_tls_get(&exec_ctx_));
+  }
+
+ protected:
+  /** Check if ready to finish */
+  virtual bool CheckReadyToFinish() { return false; }
+
+  /** Disallow delete on ExecCtx */
+  static void operator delete(void* p) { abort(); }
+
+ private:
+  /** Set exec_ctx_ to exec_ctx */
+  void Set(ExecCtx* exec_ctx) {
+    gpr_tls_set(&exec_ctx_, reinterpret_cast<intptr_t>(exec_ctx));
+  }
+
+  grpc_closure_list closure_list_ = GRPC_CLOSURE_LIST_INIT;
+  CombinerData combiner_data_ = {nullptr, nullptr};
+  uintptr_t flags_;
+  unsigned starting_cpu_ = gpr_cpu_current_cpu();
+
+  bool now_is_valid_ = false;
+  grpc_millis now_ = 0;
+
+  GPR_TLS_CLASS_DECL(exec_ctx_);
+  ExecCtx* last_exec_ctx_ = Get();
+};
+}  // namespace grpc_core
 
 #endif /* GRPC_CORE_LIB_IOMGR_EXEC_CTX_H */
diff --git a/src/core/lib/iomgr/executor.cc b/src/core/lib/iomgr/executor.cc
index d8a195f010..b7288d5bf3 100644
--- a/src/core/lib/iomgr/executor.cc
+++ b/src/core/lib/iomgr/executor.cc
@@ -55,7 +55,7 @@ grpc_core::TraceFlag executor_trace(false, "executor");
 
 static void executor_thread(void* arg);
 
-static size_t run_closures(grpc_exec_ctx* exec_ctx, grpc_closure_list list) {
+static size_t run_closures(grpc_closure_list list) {
   size_t n = 0;
 
   grpc_closure* c = list.head;
@@ -73,11 +73,11 @@ static size_t run_closures(grpc_exec_ctx* exec_ctx, grpc_closure_list list) {
 #ifndef NDEBUG
     c->scheduled = false;
 #endif
-    c->cb(exec_ctx, c->cb_arg, error);
+    c->cb(c->cb_arg, error);
     GRPC_ERROR_UNREF(error);
     c = next;
     n++;
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   return n;
@@ -87,7 +87,7 @@ bool grpc_executor_is_threaded() {
   return gpr_atm_no_barrier_load(&g_cur_threads) > 0;
 }
 
-void grpc_executor_set_threading(grpc_exec_ctx* exec_ctx, bool threading) {
+void grpc_executor_set_threading(bool threading) {
   gpr_atm cur_threads = gpr_atm_no_barrier_load(&g_cur_threads);
   if (threading) {
     if (cur_threads > 0) return;
@@ -104,8 +104,8 @@ void grpc_executor_set_threading(grpc_exec_ctx* exec_ctx, bool threading) {
 
     gpr_thd_options opt = gpr_thd_options_default();
     gpr_thd_options_set_joinable(&opt);
-    gpr_thd_new(&g_thread_state[0].id, executor_thread, &g_thread_state[0],
-                &opt);
+    gpr_thd_new(&g_thread_state[0].id, "grpc_executor", executor_thread,
+                &g_thread_state[0], &opt);
   } else {
     if (cur_threads == 0) return;
     for (size_t i = 0; i < g_max_threads; i++) {
@@ -125,28 +125,25 @@ void grpc_executor_set_threading(grpc_exec_ctx* exec_ctx, bool threading) {
     for (size_t i = 0; i < g_max_threads; i++) {
       gpr_mu_destroy(&g_thread_state[i].mu);
       gpr_cv_destroy(&g_thread_state[i].cv);
-      run_closures(exec_ctx, g_thread_state[i].elems);
+      run_closures(g_thread_state[i].elems);
     }
     gpr_free(g_thread_state);
     gpr_tls_destroy(&g_this_thread_state);
   }
 }
 
-void grpc_executor_init(grpc_exec_ctx* exec_ctx) {
+void grpc_executor_init() {
   gpr_atm_no_barrier_store(&g_cur_threads, 0);
-  grpc_executor_set_threading(exec_ctx, true);
+  grpc_executor_set_threading(true);
 }
 
-void grpc_executor_shutdown(grpc_exec_ctx* exec_ctx) {
-  grpc_executor_set_threading(exec_ctx, false);
-}
+void grpc_executor_shutdown() { grpc_executor_set_threading(false); }
 
 static void executor_thread(void* arg) {
   thread_state* ts = (thread_state*)arg;
   gpr_tls_set(&g_this_thread_state, (intptr_t)ts);
 
-  grpc_exec_ctx exec_ctx =
-      GRPC_EXEC_CTX_INITIALIZER(0, grpc_never_ready_to_finish, nullptr);
+  grpc_core::ExecCtx exec_ctx(0);
 
   size_t subtract_depth = 0;
   for (;;) {
@@ -158,7 +155,7 @@ static void executor_thread(void* arg) {
     ts->depth -= subtract_depth;
     while (grpc_closure_list_empty(ts->elems) && !ts->shutdown) {
       ts->queued_long_job = false;
-      gpr_cv_wait(&ts->cv, &ts->mu, gpr_inf_future(GPR_CLOCK_REALTIME));
+      gpr_cv_wait(&ts->cv, &ts->mu, gpr_inf_future(GPR_CLOCK_MONOTONIC));
     }
     if (ts->shutdown) {
       if (executor_trace.enabled()) {
@@ -168,7 +165,7 @@ static void executor_thread(void* arg) {
       gpr_mu_unlock(&ts->mu);
       break;
     }
-    GRPC_STATS_INC_EXECUTOR_QUEUE_DRAINED(&exec_ctx);
+    GRPC_STATS_INC_EXECUTOR_QUEUE_DRAINED();
     grpc_closure_list exec = ts->elems;
     ts->elems = GRPC_CLOSURE_LIST_INIT;
     gpr_mu_unlock(&ts->mu);
@@ -176,19 +173,18 @@ static void executor_thread(void* arg) {
       gpr_log(GPR_DEBUG, "EXECUTOR[%d]: execute", (int)(ts - g_thread_state));
     }
 
-    grpc_exec_ctx_invalidate_now(&exec_ctx);
-    subtract_depth = run_closures(&exec_ctx, exec);
+    grpc_core::ExecCtx::Get()->InvalidateNow();
+    subtract_depth = run_closures(exec);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void executor_push(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                          grpc_error* error, bool is_short) {
+static void executor_push(grpc_closure* closure, grpc_error* error,
+                          bool is_short) {
   bool retry_push;
   if (is_short) {
-    GRPC_STATS_INC_EXECUTOR_SCHEDULED_SHORT_ITEMS(exec_ctx);
+    GRPC_STATS_INC_EXECUTOR_SCHEDULED_SHORT_ITEMS();
   } else {
-    GRPC_STATS_INC_EXECUTOR_SCHEDULED_LONG_ITEMS(exec_ctx);
+    GRPC_STATS_INC_EXECUTOR_SCHEDULED_LONG_ITEMS();
   }
   do {
     retry_push = false;
@@ -202,14 +198,16 @@ static void executor_push(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
         gpr_log(GPR_DEBUG, "EXECUTOR: schedule %p inline", closure);
 #endif
       }
-      grpc_closure_list_append(&exec_ctx->closure_list, closure, error);
+      grpc_closure_list_append(grpc_core::ExecCtx::Get()->closure_list(),
+                               closure, error);
       return;
     }
     thread_state* ts = (thread_state*)gpr_tls_get(&g_this_thread_state);
     if (ts == nullptr) {
-      ts = &g_thread_state[GPR_HASH_POINTER(exec_ctx, cur_thread_count)];
+      ts = &g_thread_state[GPR_HASH_POINTER(grpc_core::ExecCtx::Get(),
+                                            cur_thread_count)];
     } else {
-      GRPC_STATS_INC_EXECUTOR_SCHEDULED_TO_SELF(exec_ctx);
+      GRPC_STATS_INC_EXECUTOR_SCHEDULED_TO_SELF();
     }
     thread_state* orig_ts = ts;
 
@@ -245,7 +243,7 @@ static void executor_push(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
         continue;
       }
       if (grpc_closure_list_empty(ts->elems)) {
-        GRPC_STATS_INC_EXECUTOR_WAKEUP_INITIATED(exec_ctx);
+        GRPC_STATS_INC_EXECUTOR_WAKEUP_INITIATED();
         gpr_cv_signal(&ts->cv);
       }
       grpc_closure_list_append(&ts->elems, closure, error);
@@ -263,25 +261,23 @@ static void executor_push(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
 
         gpr_thd_options opt = gpr_thd_options_default();
         gpr_thd_options_set_joinable(&opt);
-        gpr_thd_new(&g_thread_state[cur_thread_count].id, executor_thread,
-                    &g_thread_state[cur_thread_count], &opt);
+        gpr_thd_new(&g_thread_state[cur_thread_count].id, "gpr_executor",
+                    executor_thread, &g_thread_state[cur_thread_count], &opt);
       }
       gpr_spinlock_unlock(&g_adding_thread_lock);
     }
     if (retry_push) {
-      GRPC_STATS_INC_EXECUTOR_PUSH_RETRIES(exec_ctx);
+      GRPC_STATS_INC_EXECUTOR_PUSH_RETRIES();
     }
   } while (retry_push);
 }
 
-static void executor_push_short(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                                grpc_error* error) {
-  executor_push(exec_ctx, closure, error, true);
+static void executor_push_short(grpc_closure* closure, grpc_error* error) {
+  executor_push(closure, error, true);
 }
 
-static void executor_push_long(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                               grpc_error* error) {
-  executor_push(exec_ctx, closure, error, false);
+static void executor_push_long(grpc_closure* closure, grpc_error* error) {
+  executor_push(closure, error, false);
 }
 
 static const grpc_closure_scheduler_vtable executor_vtable_short = {
diff --git a/src/core/lib/iomgr/executor.h b/src/core/lib/iomgr/executor.h
index d349083eeb..e16f11aa21 100644
--- a/src/core/lib/iomgr/executor.h
+++ b/src/core/lib/iomgr/executor.h
@@ -31,18 +31,18 @@ typedef enum {
  * This mechanism is meant to outsource work (grpc_closure instances) to a
  * thread, for those cases where blocking isn't an option but there isn't a
  * non-blocking solution available. */
-void grpc_executor_init(grpc_exec_ctx* exec_ctx);
+void grpc_executor_init();
 
 grpc_closure_scheduler* grpc_executor_scheduler(grpc_executor_job_length);
 
 /** Shutdown the executor, running all pending work as part of the call */
-void grpc_executor_shutdown(grpc_exec_ctx* exec_ctx);
+void grpc_executor_shutdown();
 
 /** Is the executor multi-threaded? */
 bool grpc_executor_is_threaded();
 
 /* enable/disable threading - must be called after grpc_executor_init and before
    grpc_executor_shutdown */
-void grpc_executor_set_threading(grpc_exec_ctx* exec_ctx, bool enable);
+void grpc_executor_set_threading(bool enable);
 
 #endif /* GRPC_CORE_LIB_IOMGR_EXECUTOR_H */
diff --git a/src/core/lib/iomgr/fork_posix.cc b/src/core/lib/iomgr/fork_posix.cc
index f3cfd141b6..cc131408af 100644
--- a/src/core/lib/iomgr/fork_posix.cc
+++ b/src/core/lib/iomgr/fork_posix.cc
@@ -49,10 +49,10 @@ void grpc_prefork() {
     return;
   }
   if (grpc_is_initialized()) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_timer_manager_set_threading(false);
-    grpc_executor_set_threading(&exec_ctx, false);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_executor_set_threading(false);
+    grpc_core::ExecCtx::Get()->Flush();
     if (!gpr_await_threads(
             gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
                          gpr_time_from_seconds(3, GPR_TIMESPAN)))) {
@@ -64,18 +64,17 @@ void grpc_prefork() {
 void grpc_postfork_parent() {
   if (grpc_is_initialized()) {
     grpc_timer_manager_set_threading(true);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_executor_set_threading(&exec_ctx, true);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_executor_set_threading(true);
   }
 }
 
 void grpc_postfork_child() {
   if (grpc_is_initialized()) {
     grpc_timer_manager_set_threading(true);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_executor_set_threading(&exec_ctx, true);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_executor_set_threading(true);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 }
 
diff --git a/src/core/lib/iomgr/iocp_windows.cc b/src/core/lib/iomgr/iocp_windows.cc
index 6bbe5669c7..0b6e6823b3 100644
--- a/src/core/lib/iomgr/iocp_windows.cc
+++ b/src/core/lib/iomgr/iocp_windows.cc
@@ -42,20 +42,18 @@ static gpr_atm g_custom_events = 0;
 
 static HANDLE g_iocp;
 
-static DWORD deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
-                                        grpc_millis deadline) {
+static DWORD deadline_to_millis_timeout(grpc_millis deadline) {
   if (deadline == GRPC_MILLIS_INF_FUTURE) {
     return INFINITE;
   }
-  grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+  grpc_millis now = grpc_core::ExecCtx::Get()->Now();
   if (deadline < now) return 0;
   grpc_millis timeout = deadline - now;
   if (timeout > std::numeric_limits<DWORD>::max()) return INFINITE;
   return static_cast<DWORD>(deadline - now);
 }
 
-grpc_iocp_work_status grpc_iocp_work(grpc_exec_ctx* exec_ctx,
-                                     grpc_millis deadline) {
+grpc_iocp_work_status grpc_iocp_work(grpc_millis deadline) {
   BOOL success;
   DWORD bytes = 0;
   DWORD flags = 0;
@@ -63,11 +61,11 @@ grpc_iocp_work_status grpc_iocp_work(grpc_exec_ctx* exec_ctx,
   LPOVERLAPPED overlapped;
   grpc_winsocket* socket;
   grpc_winsocket_callback_info* info;
-  GRPC_STATS_INC_SYSCALL_POLL(exec_ctx);
+  GRPC_STATS_INC_SYSCALL_POLL();
   success =
       GetQueuedCompletionStatus(g_iocp, &bytes, &completion_key, &overlapped,
-                                deadline_to_millis_timeout(exec_ctx, deadline));
-  grpc_exec_ctx_invalidate_now(exec_ctx);
+                                deadline_to_millis_timeout(deadline));
+  grpc_core::ExecCtx::Get()->InvalidateNow();
   if (success == 0 && overlapped == NULL) {
     return GRPC_IOCP_WORK_TIMEOUT;
   }
@@ -95,7 +93,7 @@ grpc_iocp_work_status grpc_iocp_work(grpc_exec_ctx* exec_ctx,
   info->bytes_transfered = bytes;
   info->wsa_error = success ? 0 : WSAGetLastError();
   GPR_ASSERT(overlapped == &info->overlapped);
-  grpc_socket_become_ready(exec_ctx, socket, info);
+  grpc_socket_become_ready(socket, info);
   return GRPC_IOCP_WORK_WORK;
 }
 
@@ -115,22 +113,22 @@ void grpc_iocp_kick(void) {
 }
 
 void grpc_iocp_flush(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_iocp_work_status work_status;
 
   do {
-    work_status = grpc_iocp_work(&exec_ctx, GRPC_MILLIS_INF_PAST);
+    work_status = grpc_iocp_work(GRPC_MILLIS_INF_PAST);
   } while (work_status == GRPC_IOCP_WORK_KICK ||
-           grpc_exec_ctx_flush(&exec_ctx));
+           grpc_core::ExecCtx::Get()->Flush());
 }
 
 void grpc_iocp_shutdown(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (gpr_atm_acq_load(&g_custom_events)) {
-    grpc_iocp_work(&exec_ctx, GRPC_MILLIS_INF_FUTURE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_iocp_work(GRPC_MILLIS_INF_FUTURE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   GPR_ASSERT(CloseHandle(g_iocp));
 }
 
diff --git a/src/core/lib/iomgr/iocp_windows.h b/src/core/lib/iomgr/iocp_windows.h
index 0e9c3481f7..75b0ff4a92 100644
--- a/src/core/lib/iomgr/iocp_windows.h
+++ b/src/core/lib/iomgr/iocp_windows.h
@@ -33,8 +33,7 @@ typedef enum {
   GRPC_IOCP_WORK_KICK
 } grpc_iocp_work_status;
 
-grpc_iocp_work_status grpc_iocp_work(grpc_exec_ctx* exec_ctx,
-                                     grpc_millis deadline);
+grpc_iocp_work_status grpc_iocp_work(grpc_millis deadline);
 void grpc_iocp_init(void);
 void grpc_iocp_kick(void);
 void grpc_iocp_flush(void);
diff --git a/src/core/lib/iomgr/iomgr.cc b/src/core/lib/iomgr/iomgr.cc
index e077b35014..70807c479d 100644
--- a/src/core/lib/iomgr/iomgr.cc
+++ b/src/core/lib/iomgr/iomgr.cc
@@ -45,20 +45,20 @@ static gpr_cv g_rcv;
 static int g_shutdown;
 static grpc_iomgr_object g_root_object;
 
-void grpc_iomgr_init(grpc_exec_ctx* exec_ctx) {
+void grpc_iomgr_init() {
+  grpc_core::ExecCtx exec_ctx;
   g_shutdown = 0;
   gpr_mu_init(&g_mu);
   gpr_cv_init(&g_rcv);
-  grpc_exec_ctx_global_init();
-  grpc_executor_init(exec_ctx);
-  grpc_timer_list_init(exec_ctx);
+  grpc_executor_init();
+  grpc_timer_list_init();
   g_root_object.next = g_root_object.prev = &g_root_object;
   g_root_object.name = (char*)"root";
   grpc_network_status_init();
   grpc_iomgr_platform_init();
 }
 
-void grpc_iomgr_start(grpc_exec_ctx* exec_ctx) { grpc_timer_manager_init(); }
+void grpc_iomgr_start() { grpc_timer_manager_init(); }
 
 static size_t count_objects(void) {
   grpc_iomgr_object* obj;
@@ -76,75 +76,76 @@ static void dump_objects(const char* kind) {
   }
 }
 
-void grpc_iomgr_shutdown(grpc_exec_ctx* exec_ctx) {
+void grpc_iomgr_shutdown() {
   gpr_timespec shutdown_deadline = gpr_time_add(
       gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_seconds(10, GPR_TIMESPAN));
   gpr_timespec last_warning_time = gpr_now(GPR_CLOCK_REALTIME);
 
-  grpc_timer_manager_shutdown();
-  grpc_iomgr_platform_flush();
-  grpc_executor_shutdown(exec_ctx);
-
-  gpr_mu_lock(&g_mu);
-  g_shutdown = 1;
-  while (g_root_object.next != &g_root_object) {
-    if (gpr_time_cmp(
-            gpr_time_sub(gpr_now(GPR_CLOCK_REALTIME), last_warning_time),
-            gpr_time_from_seconds(1, GPR_TIMESPAN)) >= 0) {
-      if (g_root_object.next != &g_root_object) {
-        gpr_log(GPR_DEBUG,
-                "Waiting for %" PRIuPTR " iomgr objects to be destroyed",
-                count_objects());
+  {
+    grpc_timer_manager_shutdown();
+    grpc_iomgr_platform_flush();
+    grpc_executor_shutdown();
+
+    gpr_mu_lock(&g_mu);
+    g_shutdown = 1;
+    while (g_root_object.next != &g_root_object) {
+      if (gpr_time_cmp(
+              gpr_time_sub(gpr_now(GPR_CLOCK_REALTIME), last_warning_time),
+              gpr_time_from_seconds(1, GPR_TIMESPAN)) >= 0) {
+        if (g_root_object.next != &g_root_object) {
+          gpr_log(GPR_DEBUG,
+                  "Waiting for %" PRIuPTR " iomgr objects to be destroyed",
+                  count_objects());
+        }
+        last_warning_time = gpr_now(GPR_CLOCK_REALTIME);
       }
-      last_warning_time = gpr_now(GPR_CLOCK_REALTIME);
-    }
-    exec_ctx->now_is_valid = true;
-    exec_ctx->now = GRPC_MILLIS_INF_FUTURE;
-    if (grpc_timer_check(exec_ctx, nullptr) == GRPC_TIMERS_FIRED) {
-      gpr_mu_unlock(&g_mu);
-      grpc_exec_ctx_flush(exec_ctx);
-      grpc_iomgr_platform_flush();
-      gpr_mu_lock(&g_mu);
-      continue;
-    }
-    if (g_root_object.next != &g_root_object) {
-      if (grpc_iomgr_abort_on_leaks()) {
-        gpr_log(GPR_DEBUG,
-                "Failed to free %" PRIuPTR
-                " iomgr objects before shutdown deadline: "
-                "memory leaks are likely",
-                count_objects());
-        dump_objects("LEAKED");
-        abort();
+      grpc_core::ExecCtx::Get()->SetNowIomgrShutdown();
+      if (grpc_timer_check(nullptr) == GRPC_TIMERS_FIRED) {
+        gpr_mu_unlock(&g_mu);
+        grpc_core::ExecCtx::Get()->Flush();
+        grpc_iomgr_platform_flush();
+        gpr_mu_lock(&g_mu);
+        continue;
       }
-      gpr_timespec short_deadline = gpr_time_add(
-          gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(100, GPR_TIMESPAN));
-      if (gpr_cv_wait(&g_rcv, &g_mu, short_deadline)) {
-        if (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), shutdown_deadline) > 0) {
-          if (g_root_object.next != &g_root_object) {
-            gpr_log(GPR_DEBUG,
-                    "Failed to free %" PRIuPTR
-                    " iomgr objects before shutdown deadline: "
-                    "memory leaks are likely",
-                    count_objects());
-            dump_objects("LEAKED");
+      if (g_root_object.next != &g_root_object) {
+        if (grpc_iomgr_abort_on_leaks()) {
+          gpr_log(GPR_DEBUG,
+                  "Failed to free %" PRIuPTR
+                  " iomgr objects before shutdown deadline: "
+                  "memory leaks are likely",
+                  count_objects());
+          dump_objects("LEAKED");
+          abort();
+        }
+        gpr_timespec short_deadline =
+            gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
+                         gpr_time_from_millis(100, GPR_TIMESPAN));
+        if (gpr_cv_wait(&g_rcv, &g_mu, short_deadline)) {
+          if (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), shutdown_deadline) >
+              0) {
+            if (g_root_object.next != &g_root_object) {
+              gpr_log(GPR_DEBUG,
+                      "Failed to free %" PRIuPTR
+                      " iomgr objects before shutdown deadline: "
+                      "memory leaks are likely",
+                      count_objects());
+              dump_objects("LEAKED");
+            }
+            break;
           }
-          break;
         }
       }
     }
+    gpr_mu_unlock(&g_mu);
+    grpc_timer_list_shutdown();
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  gpr_mu_unlock(&g_mu);
-
-  grpc_timer_list_shutdown(exec_ctx);
-  grpc_exec_ctx_flush(exec_ctx);
 
   /* ensure all threads have left g_mu */
   gpr_mu_lock(&g_mu);
   gpr_mu_unlock(&g_mu);
 
   grpc_iomgr_platform_shutdown();
-  grpc_exec_ctx_global_shutdown();
   grpc_network_status_shutdown();
   gpr_mu_destroy(&g_mu);
   gpr_cv_destroy(&g_rcv);
diff --git a/src/core/lib/iomgr/iomgr.h b/src/core/lib/iomgr/iomgr.h
index 2f00c0343d..3f238c660a 100644
--- a/src/core/lib/iomgr/iomgr.h
+++ b/src/core/lib/iomgr/iomgr.h
@@ -23,13 +23,13 @@
 #include "src/core/lib/iomgr/port.h"
 
 /** Initializes the iomgr. */
-void grpc_iomgr_init(grpc_exec_ctx* exec_ctx);
+void grpc_iomgr_init();
 
 /** Starts any background threads for iomgr. */
-void grpc_iomgr_start(grpc_exec_ctx* exec_ctx);
+void grpc_iomgr_start();
 
 /** Signals the intention to shutdown the iomgr. Expects to be able to flush
  * exec_ctx. */
-void grpc_iomgr_shutdown(grpc_exec_ctx* exec_ctx);
+void grpc_iomgr_shutdown();
 
 #endif /* GRPC_CORE_LIB_IOMGR_IOMGR_H */
diff --git a/src/core/lib/iomgr/iomgr_uv.cc b/src/core/lib/iomgr/iomgr_uv.cc
index b8a10f2ae8..9614c2e664 100644
--- a/src/core/lib/iomgr/iomgr_uv.cc
+++ b/src/core/lib/iomgr/iomgr_uv.cc
@@ -29,12 +29,11 @@
 gpr_thd_id g_init_thread;
 
 void grpc_iomgr_platform_init(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_pollset_global_init();
 
-  grpc_executor_set_threading(&exec_ctx, false);
+  grpc_executor_set_threading(false);
   g_init_thread = gpr_thd_currentid();
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 void grpc_iomgr_platform_flush(void) {}
 void grpc_iomgr_platform_shutdown(void) { grpc_pollset_global_shutdown(); }
diff --git a/src/core/lib/iomgr/lockfree_event.cc b/src/core/lib/iomgr/lockfree_event.cc
index f0e798e8d8..7b194e3db5 100644
--- a/src/core/lib/iomgr/lockfree_event.cc
+++ b/src/core/lib/iomgr/lockfree_event.cc
@@ -85,7 +85,7 @@ void LockfreeEvent::DestroyEvent() {
                                    kShutdownBit /* shutdown, no error */));
 }
 
-void LockfreeEvent::NotifyOn(grpc_exec_ctx* exec_ctx, grpc_closure* closure) {
+void LockfreeEvent::NotifyOn(grpc_closure* closure) {
   while (true) {
     gpr_atm curr = gpr_atm_no_barrier_load(&state_);
     if (grpc_polling_trace.enabled()) {
@@ -118,7 +118,7 @@ void LockfreeEvent::NotifyOn(grpc_exec_ctx* exec_ctx, grpc_closure* closure) {
            closure when transitioning out of CLOSURE_NO_READY state (i.e there
            is no other code that needs to 'happen-after' this) */
         if (gpr_atm_no_barrier_cas(&state_, kClosureReady, kClosureNotReady)) {
-          GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+          GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
           return; /* Successful. Return */
         }
 
@@ -131,7 +131,7 @@ void LockfreeEvent::NotifyOn(grpc_exec_ctx* exec_ctx, grpc_closure* closure) {
            schedule the closure with the shutdown error */
         if ((curr & kShutdownBit) > 0) {
           grpc_error* shutdown_err = (grpc_error*)(curr & ~kShutdownBit);
-          GRPC_CLOSURE_SCHED(exec_ctx, closure,
+          GRPC_CLOSURE_SCHED(closure,
                              GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                                  "FD Shutdown", &shutdown_err, 1));
           return;
@@ -149,8 +149,7 @@ void LockfreeEvent::NotifyOn(grpc_exec_ctx* exec_ctx, grpc_closure* closure) {
   GPR_UNREACHABLE_CODE(return );
 }
 
-bool LockfreeEvent::SetShutdown(grpc_exec_ctx* exec_ctx,
-                                grpc_error* shutdown_err) {
+bool LockfreeEvent::SetShutdown(grpc_error* shutdown_err) {
   gpr_atm new_state = (gpr_atm)shutdown_err | kShutdownBit;
 
   while (true) {
@@ -184,7 +183,7 @@ bool LockfreeEvent::SetShutdown(grpc_exec_ctx* exec_ctx,
            happens-after on that edge), and a release to pair with anything
            loading the shutdown state. */
         if (gpr_atm_full_cas(&state_, curr, new_state)) {
-          GRPC_CLOSURE_SCHED(exec_ctx, (grpc_closure*)curr,
+          GRPC_CLOSURE_SCHED((grpc_closure*)curr,
                              GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                                  "FD Shutdown", &shutdown_err, 1));
           return true;
@@ -200,7 +199,7 @@ bool LockfreeEvent::SetShutdown(grpc_exec_ctx* exec_ctx,
   GPR_UNREACHABLE_CODE(return false);
 }
 
-void LockfreeEvent::SetReady(grpc_exec_ctx* exec_ctx) {
+void LockfreeEvent::SetReady() {
   while (true) {
     gpr_atm curr = gpr_atm_no_barrier_load(&state_);
 
@@ -234,7 +233,7 @@ void LockfreeEvent::SetReady(grpc_exec_ctx* exec_ctx) {
            spurious set_ready; release pairs with this or the acquire in
            notify_on (or set_shutdown) */
         else if (gpr_atm_full_cas(&state_, curr, kClosureNotReady)) {
-          GRPC_CLOSURE_SCHED(exec_ctx, (grpc_closure*)curr, GRPC_ERROR_NONE);
+          GRPC_CLOSURE_SCHED((grpc_closure*)curr, GRPC_ERROR_NONE);
           return;
         }
         /* else the state changed again (only possible by either a racing
diff --git a/src/core/lib/iomgr/lockfree_event.h b/src/core/lib/iomgr/lockfree_event.h
index aec67a3399..3bd3fd72f1 100644
--- a/src/core/lib/iomgr/lockfree_event.h
+++ b/src/core/lib/iomgr/lockfree_event.h
@@ -44,9 +44,9 @@ class LockfreeEvent {
     return (gpr_atm_no_barrier_load(&state_) & kShutdownBit) != 0;
   }
 
-  void NotifyOn(grpc_exec_ctx* exec_ctx, grpc_closure* closure);
-  bool SetShutdown(grpc_exec_ctx* exec_ctx, grpc_error* error);
-  void SetReady(grpc_exec_ctx* exec_ctx);
+  void NotifyOn(grpc_closure* closure);
+  bool SetShutdown(grpc_error* error);
+  void SetReady();
 
  private:
   enum State { kClosureNotReady = 0, kClosureReady = 2, kShutdownBit = 1 };
diff --git a/src/core/lib/iomgr/polling_entity.cc b/src/core/lib/iomgr/polling_entity.cc
index 0ee4ea1255..126f6f45d6 100644
--- a/src/core/lib/iomgr/polling_entity.cc
+++ b/src/core/lib/iomgr/polling_entity.cc
@@ -56,32 +56,28 @@ bool grpc_polling_entity_is_empty(const grpc_polling_entity* pollent) {
   return pollent->tag == GRPC_POLLS_NONE;
 }
 
-void grpc_polling_entity_add_to_pollset_set(grpc_exec_ctx* exec_ctx,
-                                            grpc_polling_entity* pollent,
+void grpc_polling_entity_add_to_pollset_set(grpc_polling_entity* pollent,
                                             grpc_pollset_set* pss_dst) {
   if (pollent->tag == GRPC_POLLS_POLLSET) {
     GPR_ASSERT(pollent->pollent.pollset != nullptr);
-    grpc_pollset_set_add_pollset(exec_ctx, pss_dst, pollent->pollent.pollset);
+    grpc_pollset_set_add_pollset(pss_dst, pollent->pollent.pollset);
   } else if (pollent->tag == GRPC_POLLS_POLLSET_SET) {
     GPR_ASSERT(pollent->pollent.pollset_set != nullptr);
-    grpc_pollset_set_add_pollset_set(exec_ctx, pss_dst,
-                                     pollent->pollent.pollset_set);
+    grpc_pollset_set_add_pollset_set(pss_dst, pollent->pollent.pollset_set);
   } else {
     gpr_log(GPR_ERROR, "Invalid grpc_polling_entity tag '%d'", pollent->tag);
     abort();
   }
 }
 
-void grpc_polling_entity_del_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                              grpc_polling_entity* pollent,
+void grpc_polling_entity_del_from_pollset_set(grpc_polling_entity* pollent,
                                               grpc_pollset_set* pss_dst) {
   if (pollent->tag == GRPC_POLLS_POLLSET) {
     GPR_ASSERT(pollent->pollent.pollset != nullptr);
-    grpc_pollset_set_del_pollset(exec_ctx, pss_dst, pollent->pollent.pollset);
+    grpc_pollset_set_del_pollset(pss_dst, pollent->pollent.pollset);
   } else if (pollent->tag == GRPC_POLLS_POLLSET_SET) {
     GPR_ASSERT(pollent->pollent.pollset_set != nullptr);
-    grpc_pollset_set_del_pollset_set(exec_ctx, pss_dst,
-                                     pollent->pollent.pollset_set);
+    grpc_pollset_set_del_pollset_set(pss_dst, pollent->pollent.pollset_set);
   } else {
     gpr_log(GPR_ERROR, "Invalid grpc_polling_entity tag '%d'", pollent->tag);
     abort();
diff --git a/src/core/lib/iomgr/polling_entity.h b/src/core/lib/iomgr/polling_entity.h
index dbe579e60d..0102d32c11 100644
--- a/src/core/lib/iomgr/polling_entity.h
+++ b/src/core/lib/iomgr/polling_entity.h
@@ -55,14 +55,12 @@ bool grpc_polling_entity_is_empty(const grpc_polling_entity* pollent);
 
 /** Add the pollset or pollset_set in \a pollent to the destination pollset_set
  * \a * pss_dst */
-void grpc_polling_entity_add_to_pollset_set(grpc_exec_ctx* exec_ctx,
-                                            grpc_polling_entity* pollent,
+void grpc_polling_entity_add_to_pollset_set(grpc_polling_entity* pollent,
                                             grpc_pollset_set* pss_dst);
 
 /** Delete the pollset or pollset_set in \a pollent from the destination
  * pollset_set \a * pss_dst */
-void grpc_polling_entity_del_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                              grpc_polling_entity* pollent,
+void grpc_polling_entity_del_from_pollset_set(grpc_polling_entity* pollent,
                                               grpc_pollset_set* pss_dst);
 
 #endif /* GRPC_CORE_LIB_IOMGR_POLLING_ENTITY_H */
diff --git a/src/core/lib/iomgr/pollset.h b/src/core/lib/iomgr/pollset.h
index d5d78f3101..6bb3cd3e0c 100644
--- a/src/core/lib/iomgr/pollset.h
+++ b/src/core/lib/iomgr/pollset.h
@@ -42,9 +42,8 @@ size_t grpc_pollset_size(void);
 void grpc_pollset_init(grpc_pollset* pollset, gpr_mu** mu);
 /* Begin shutting down the pollset, and call closure when done.
  * pollset's mutex must be held */
-void grpc_pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_closure* closure);
-void grpc_pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset);
+void grpc_pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure);
+void grpc_pollset_destroy(grpc_pollset* pollset);
 
 /* Do some work on a pollset.
    May involve invoking asynchronous callbacks, or actually polling file
@@ -68,13 +67,13 @@ void grpc_pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset);
    May call grpc_closure_list_run on grpc_closure_list, without holding the
    pollset
    lock */
-grpc_error* grpc_pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_work(grpc_pollset* pollset,
                               grpc_pollset_worker** worker,
                               grpc_millis deadline) GRPC_MUST_USE_RESULT;
 
 /* Break one polling thread out of polling work for this pollset.
    If specific_worker is non-NULL, then kick that worker. */
-grpc_error* grpc_pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_kick(grpc_pollset* pollset,
                               grpc_pollset_worker* specific_worker)
     GRPC_MUST_USE_RESULT;
 
diff --git a/src/core/lib/iomgr/pollset_set.h b/src/core/lib/iomgr/pollset_set.h
index 089c15cc94..a94d0afe75 100644
--- a/src/core/lib/iomgr/pollset_set.h
+++ b/src/core/lib/iomgr/pollset_set.h
@@ -29,19 +29,14 @@
 typedef struct grpc_pollset_set grpc_pollset_set;
 
 grpc_pollset_set* grpc_pollset_set_create(void);
-void grpc_pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                              grpc_pollset_set* pollset_set);
-void grpc_pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_destroy(grpc_pollset_set* pollset_set);
+void grpc_pollset_set_add_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset);
-void grpc_pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_del_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset);
-void grpc_pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item);
-void grpc_pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item);
 
 #endif /* GRPC_CORE_LIB_IOMGR_POLLSET_SET_H */
diff --git a/src/core/lib/iomgr/pollset_set_uv.cc b/src/core/lib/iomgr/pollset_set_uv.cc
index 90186edbb7..ac5dade8a5 100644
--- a/src/core/lib/iomgr/pollset_set_uv.cc
+++ b/src/core/lib/iomgr/pollset_set_uv.cc
@@ -26,23 +26,18 @@ grpc_pollset_set* grpc_pollset_set_create(void) {
   return (grpc_pollset_set*)((intptr_t)0xdeafbeef);
 }
 
-void grpc_pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                              grpc_pollset_set* pollset_set) {}
+void grpc_pollset_set_destroy(grpc_pollset_set* pollset_set) {}
 
-void grpc_pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_add_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {}
 
-void grpc_pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_del_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {}
 
-void grpc_pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {}
 
-void grpc_pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {}
 
 #endif /* GRPC_UV */
diff --git a/src/core/lib/iomgr/pollset_set_windows.cc b/src/core/lib/iomgr/pollset_set_windows.cc
index 2105a47ad4..85edc9dee1 100644
--- a/src/core/lib/iomgr/pollset_set_windows.cc
+++ b/src/core/lib/iomgr/pollset_set_windows.cc
@@ -27,23 +27,18 @@ grpc_pollset_set* grpc_pollset_set_create(void) {
   return (grpc_pollset_set*)((intptr_t)0xdeafbeef);
 }
 
-void grpc_pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                              grpc_pollset_set* pollset_set) {}
+void grpc_pollset_set_destroy(grpc_pollset_set* pollset_set) {}
 
-void grpc_pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_add_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {}
 
-void grpc_pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_del_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {}
 
-void grpc_pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {}
 
-void grpc_pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {}
 
 #endif /* GRPC_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/pollset_uv.cc b/src/core/lib/iomgr/pollset_uv.cc
index 16132f3a80..d9e5ad81be 100644
--- a/src/core/lib/iomgr/pollset_uv.cc
+++ b/src/core/lib/iomgr/pollset_uv.cc
@@ -88,8 +88,7 @@ void grpc_pollset_init(grpc_pollset* pollset, gpr_mu** mu) {
   pollset->shutting_down = 0;
 }
 
-void grpc_pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_closure* closure) {
+void grpc_pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
   GPR_ASSERT(!pollset->shutting_down);
   GRPC_UV_ASSERT_SAME_THREAD();
   pollset->shutting_down = 1;
@@ -100,10 +99,10 @@ void grpc_pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
     // kick the loop once
     uv_timer_start(dummy_uv_handle, dummy_timer_cb, 0, 0);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
 }
 
-void grpc_pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
+void grpc_pollset_destroy(grpc_pollset* pollset) {
   GRPC_UV_ASSERT_SAME_THREAD();
   uv_close((uv_handle_t*)pollset->timer, timer_close_cb);
   // timer.data is a boolean indicating that the timer has finished closing
@@ -115,14 +114,14 @@ void grpc_pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
   }
 }
 
-grpc_error* grpc_pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_work(grpc_pollset* pollset,
                               grpc_pollset_worker** worker_hdl,
                               grpc_millis deadline) {
   uint64_t timeout;
   GRPC_UV_ASSERT_SAME_THREAD();
   gpr_mu_unlock(&grpc_polling_mu);
   if (grpc_pollset_work_run_loop) {
-    grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+    grpc_millis now = grpc_core::ExecCtx::Get()->Now();
     if (deadline >= now) {
       timeout = deadline - now;
     } else {
@@ -140,14 +139,14 @@ grpc_error* grpc_pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
       uv_run(uv_default_loop(), UV_RUN_NOWAIT);
     }
   }
-  if (!grpc_closure_list_empty(exec_ctx->closure_list)) {
-    grpc_exec_ctx_flush(exec_ctx);
+  if (!grpc_closure_list_empty(*grpc_core::ExecCtx::Get()->closure_list())) {
+    grpc_core::ExecCtx::Get()->Flush();
   }
   gpr_mu_lock(&grpc_polling_mu);
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_kick(grpc_pollset* pollset,
                               grpc_pollset_worker* specific_worker) {
   GRPC_UV_ASSERT_SAME_THREAD();
   uv_timer_start(dummy_uv_handle, dummy_timer_cb, 0, 0);
diff --git a/src/core/lib/iomgr/pollset_windows.cc b/src/core/lib/iomgr/pollset_windows.cc
index 95dd7d7ddd..6ef949aad7 100644
--- a/src/core/lib/iomgr/pollset_windows.cc
+++ b/src/core/lib/iomgr/pollset_windows.cc
@@ -92,20 +92,19 @@ void grpc_pollset_init(grpc_pollset* pollset, gpr_mu** mu) {
           &pollset->root_worker;
 }
 
-void grpc_pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_closure* closure) {
+void grpc_pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
   pollset->shutting_down = 1;
-  grpc_pollset_kick(exec_ctx, pollset, GRPC_POLLSET_KICK_BROADCAST);
+  grpc_pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
   if (!pollset->is_iocp_worker) {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
   } else {
     pollset->on_shutdown = closure;
   }
 }
 
-void grpc_pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {}
+void grpc_pollset_destroy(grpc_pollset* pollset) {}
 
-grpc_error* grpc_pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_work(grpc_pollset* pollset,
                               grpc_pollset_worker** worker_hdl,
                               grpc_millis deadline) {
   grpc_pollset_worker worker;
@@ -126,8 +125,8 @@ grpc_error* grpc_pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
       pollset->is_iocp_worker = 1;
       g_active_poller = &worker;
       gpr_mu_unlock(&grpc_polling_mu);
-      grpc_iocp_work(exec_ctx, deadline);
-      grpc_exec_ctx_flush(exec_ctx);
+      grpc_iocp_work(deadline);
+      grpc_core::ExecCtx::Get()->Flush();
       gpr_mu_lock(&grpc_polling_mu);
       pollset->is_iocp_worker = 0;
       g_active_poller = NULL;
@@ -145,7 +144,7 @@ grpc_error* grpc_pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
       }
 
       if (pollset->shutting_down && pollset->on_shutdown != NULL) {
-        GRPC_CLOSURE_SCHED(exec_ctx, pollset->on_shutdown, GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(pollset->on_shutdown, GRPC_ERROR_NONE);
         pollset->on_shutdown = NULL;
       }
       goto done;
@@ -158,18 +157,18 @@ grpc_error* grpc_pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
     while (!worker.kicked) {
       if (gpr_cv_wait(&worker.cv, &grpc_polling_mu,
                       grpc_millis_to_timespec(deadline, GPR_CLOCK_REALTIME))) {
-        grpc_exec_ctx_invalidate_now(exec_ctx);
+        grpc_core::ExecCtx::Get()->InvalidateNow();
         break;
       }
-      grpc_exec_ctx_invalidate_now(exec_ctx);
+      grpc_core::ExecCtx::Get()->InvalidateNow();
     }
   } else {
     pollset->kicked_without_pollers = 0;
   }
 done:
-  if (!grpc_closure_list_empty(exec_ctx->closure_list)) {
+  if (!grpc_closure_list_empty(*grpc_core::ExecCtx::Get()->closure_list())) {
     gpr_mu_unlock(&grpc_polling_mu);
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(&grpc_polling_mu);
   }
   if (added_worker) {
@@ -181,7 +180,7 @@ done:
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
+grpc_error* grpc_pollset_kick(grpc_pollset* p,
                               grpc_pollset_worker* specific_worker) {
   if (specific_worker != NULL) {
     if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
@@ -209,7 +208,7 @@ grpc_error* grpc_pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
     specific_worker =
         pop_front_worker(&p->root_worker, GRPC_POLLSET_WORKER_LINK_POLLSET);
     if (specific_worker != NULL) {
-      grpc_pollset_kick(exec_ctx, p, specific_worker);
+      grpc_pollset_kick(p, specific_worker);
     } else if (p->is_iocp_worker) {
       grpc_iocp_kick();
     } else {
diff --git a/src/core/lib/iomgr/resolve_address.h b/src/core/lib/iomgr/resolve_address.h
index 5105020404..12fc2ed088 100644
--- a/src/core/lib/iomgr/resolve_address.h
+++ b/src/core/lib/iomgr/resolve_address.h
@@ -38,8 +38,7 @@ typedef struct {
 /* Asynchronously resolve addr. Use default_port if a port isn't designated
    in addr, otherwise use the port in addr. */
 /* TODO(ctiller): add a timeout here */
-extern void (*grpc_resolve_address)(grpc_exec_ctx* exec_ctx, const char* addr,
-                                    const char* default_port,
+extern void (*grpc_resolve_address)(const char* addr, const char* default_port,
                                     grpc_pollset_set* interested_parties,
                                     grpc_closure* on_done,
                                     grpc_resolved_addresses** addresses);
diff --git a/src/core/lib/iomgr/resolve_address_posix.cc b/src/core/lib/iomgr/resolve_address_posix.cc
index fb5fa9d422..cc3d4fd7cf 100644
--- a/src/core/lib/iomgr/resolve_address_posix.cc
+++ b/src/core/lib/iomgr/resolve_address_posix.cc
@@ -42,6 +42,7 @@
 static grpc_error* blocking_resolve_address_impl(
     const char* name, const char* default_port,
     grpc_resolved_addresses** addresses) {
+  grpc_core::ExecCtx exec_ctx;
   struct addrinfo hints;
   struct addrinfo *result = nullptr, *resp;
   char* host;
@@ -81,7 +82,7 @@ static grpc_error* blocking_resolve_address_impl(
 
   GRPC_SCHEDULING_START_BLOCKING_REGION;
   s = getaddrinfo(host, port, &hints, &result);
-  GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX;
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
 
   if (s != 0) {
     /* Retry if well-known service name is recognized */
@@ -90,7 +91,7 @@ static grpc_error* blocking_resolve_address_impl(
       if (strcmp(port, svc[i][0]) == 0) {
         GRPC_SCHEDULING_START_BLOCKING_REGION;
         s = getaddrinfo(host, svc[i][1], &hints, &result);
-        GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX;
+        GRPC_SCHEDULING_END_BLOCKING_REGION;
         break;
       }
     }
@@ -152,12 +153,10 @@ typedef struct {
 
 /* Callback to be passed to grpc_executor to asynch-ify
  * grpc_blocking_resolve_address */
-static void do_request_thread(grpc_exec_ctx* exec_ctx, void* rp,
-                              grpc_error* error) {
+static void do_request_thread(void* rp, grpc_error* error) {
   request* r = (request*)rp;
-  GRPC_CLOSURE_SCHED(
-      exec_ctx, r->on_done,
-      grpc_blocking_resolve_address(r->name, r->default_port, r->addrs_out));
+  GRPC_CLOSURE_SCHED(r->on_done, grpc_blocking_resolve_address(
+                                     r->name, r->default_port, r->addrs_out));
   gpr_free(r->name);
   gpr_free(r->default_port);
   gpr_free(r);
@@ -170,8 +169,7 @@ void grpc_resolved_addresses_destroy(grpc_resolved_addresses* addrs) {
   gpr_free(addrs);
 }
 
-static void resolve_address_impl(grpc_exec_ctx* exec_ctx, const char* name,
-                                 const char* default_port,
+static void resolve_address_impl(const char* name, const char* default_port,
                                  grpc_pollset_set* interested_parties,
                                  grpc_closure* on_done,
                                  grpc_resolved_addresses** addrs) {
@@ -182,11 +180,11 @@ static void resolve_address_impl(grpc_exec_ctx* exec_ctx, const char* name,
   r->default_port = gpr_strdup(default_port);
   r->on_done = on_done;
   r->addrs_out = addrs;
-  GRPC_CLOSURE_SCHED(exec_ctx, &r->request_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(&r->request_closure, GRPC_ERROR_NONE);
 }
 
 void (*grpc_resolve_address)(
-    grpc_exec_ctx* exec_ctx, const char* name, const char* default_port,
+    const char* name, const char* default_port,
     grpc_pollset_set* interested_parties, grpc_closure* on_done,
     grpc_resolved_addresses** addrs) = resolve_address_impl;
 
diff --git a/src/core/lib/iomgr/resolve_address_uv.cc b/src/core/lib/iomgr/resolve_address_uv.cc
index 6d09fd1d02..3eab04f3de 100644
--- a/src/core/lib/iomgr/resolve_address_uv.cc
+++ b/src/core/lib/iomgr/resolve_address_uv.cc
@@ -114,7 +114,7 @@ static grpc_error* handle_addrinfo_result(int status, struct addrinfo* result,
 static void getaddrinfo_callback(uv_getaddrinfo_t* req, int status,
                                  struct addrinfo* res) {
   request* r = (request*)req->data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_error* error;
   int retry_status;
   char* port = r->port;
@@ -130,8 +130,8 @@ static void getaddrinfo_callback(uv_getaddrinfo_t* req, int status,
   /* Either no retry was attempted, or the retry failed. Either way, the
      original error probably has more interesting information */
   error = handle_addrinfo_result(status, res, r->addresses);
-  GRPC_CLOSURE_SCHED(&exec_ctx, r->on_done, error);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CLOSURE_SCHED(r->on_done, error);
+
   gpr_free(r->hints);
   gpr_free(r->host);
   gpr_free(r->port);
@@ -224,8 +224,7 @@ void grpc_resolved_addresses_destroy(grpc_resolved_addresses* addrs) {
   gpr_free(addrs);
 }
 
-static void resolve_address_impl(grpc_exec_ctx* exec_ctx, const char* name,
-                                 const char* default_port,
+static void resolve_address_impl(const char* name, const char* default_port,
                                  grpc_pollset_set* interested_parties,
                                  grpc_closure* on_done,
                                  grpc_resolved_addresses** addrs) {
@@ -239,7 +238,7 @@ static void resolve_address_impl(grpc_exec_ctx* exec_ctx, const char* name,
   GRPC_UV_ASSERT_SAME_THREAD();
   err = try_split_host_port(name, default_port, &host, &port);
   if (err != GRPC_ERROR_NONE) {
-    GRPC_CLOSURE_SCHED(exec_ctx, on_done, err);
+    GRPC_CLOSURE_SCHED(on_done, err);
     gpr_free(host);
     gpr_free(port);
     return;
@@ -268,7 +267,7 @@ static void resolve_address_impl(grpc_exec_ctx* exec_ctx, const char* name,
     err = GRPC_ERROR_CREATE_FROM_STATIC_STRING("getaddrinfo failed");
     err = grpc_error_set_str(err, GRPC_ERROR_STR_OS_ERROR,
                              grpc_slice_from_static_string(uv_strerror(s)));
-    GRPC_CLOSURE_SCHED(exec_ctx, on_done, err);
+    GRPC_CLOSURE_SCHED(on_done, err);
     gpr_free(r);
     gpr_free(req);
     gpr_free(hints);
@@ -278,7 +277,7 @@ static void resolve_address_impl(grpc_exec_ctx* exec_ctx, const char* name,
 }
 
 void (*grpc_resolve_address)(
-    grpc_exec_ctx* exec_ctx, const char* name, const char* default_port,
+    const char* name, const char* default_port,
     grpc_pollset_set* interested_parties, grpc_closure* on_done,
     grpc_resolved_addresses** addrs) = resolve_address_impl;
 
diff --git a/src/core/lib/iomgr/resolve_address_windows.cc b/src/core/lib/iomgr/resolve_address_windows.cc
index d9fc17a9f4..ccb1dae689 100644
--- a/src/core/lib/iomgr/resolve_address_windows.cc
+++ b/src/core/lib/iomgr/resolve_address_windows.cc
@@ -51,6 +51,7 @@ typedef struct {
 static grpc_error* blocking_resolve_address_impl(
     const char* name, const char* default_port,
     grpc_resolved_addresses** addresses) {
+  grpc_core::ExecCtx exec_ctx;
   struct addrinfo hints;
   struct addrinfo *result = NULL, *resp;
   char* host;
@@ -87,7 +88,7 @@ static grpc_error* blocking_resolve_address_impl(
 
   GRPC_SCHEDULING_START_BLOCKING_REGION;
   s = getaddrinfo(host, port, &hints, &result);
-  GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX;
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
   if (s != 0) {
     error = GRPC_WSA_ERROR(WSAGetLastError(), "getaddrinfo");
     goto done;
@@ -132,8 +133,7 @@ grpc_error* (*grpc_blocking_resolve_address)(
 
 /* Callback to be passed to grpc_executor to asynch-ify
  * grpc_blocking_resolve_address */
-static void do_request_thread(grpc_exec_ctx* exec_ctx, void* rp,
-                              grpc_error* error) {
+static void do_request_thread(void* rp, grpc_error* error) {
   request* r = (request*)rp;
   if (error == GRPC_ERROR_NONE) {
     error =
@@ -141,7 +141,7 @@ static void do_request_thread(grpc_exec_ctx* exec_ctx, void* rp,
   } else {
     GRPC_ERROR_REF(error);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, r->on_done, error);
+  GRPC_CLOSURE_SCHED(r->on_done, error);
   gpr_free(r->name);
   gpr_free(r->default_port);
   gpr_free(r);
@@ -154,8 +154,7 @@ void grpc_resolved_addresses_destroy(grpc_resolved_addresses* addrs) {
   gpr_free(addrs);
 }
 
-static void resolve_address_impl(grpc_exec_ctx* exec_ctx, const char* name,
-                                 const char* default_port,
+static void resolve_address_impl(const char* name, const char* default_port,
                                  grpc_pollset_set* interested_parties,
                                  grpc_closure* on_done,
                                  grpc_resolved_addresses** addresses) {
@@ -166,11 +165,11 @@ static void resolve_address_impl(grpc_exec_ctx* exec_ctx, const char* name,
   r->default_port = gpr_strdup(default_port);
   r->on_done = on_done;
   r->addresses = addresses;
-  GRPC_CLOSURE_SCHED(exec_ctx, &r->request_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(&r->request_closure, GRPC_ERROR_NONE);
 }
 
 void (*grpc_resolve_address)(
-    grpc_exec_ctx* exec_ctx, const char* name, const char* default_port,
+    const char* name, const char* default_port,
     grpc_pollset_set* interested_parties, grpc_closure* on_done,
     grpc_resolved_addresses** addresses) = resolve_address_impl;
 
diff --git a/src/core/lib/iomgr/resource_quota.cc b/src/core/lib/iomgr/resource_quota.cc
index ccd8d9f379..cabe28e4e6 100644
--- a/src/core/lib/iomgr/resource_quota.cc
+++ b/src/core/lib/iomgr/resource_quota.cc
@@ -154,8 +154,7 @@ struct grpc_resource_quota {
   char* name;
 };
 
-static void ru_unref_by(grpc_exec_ctx* exec_ctx,
-                        grpc_resource_user* resource_user, gpr_atm amount);
+static void ru_unref_by(grpc_resource_user* resource_user, gpr_atm amount);
 
 /*******************************************************************************
  * list management
@@ -239,35 +238,31 @@ static void rulist_remove(grpc_resource_user* resource_user, grpc_rulist list) {
  * resource quota state machine
  */
 
-static bool rq_alloc(grpc_exec_ctx* exec_ctx,
-                     grpc_resource_quota* resource_quota);
+static bool rq_alloc(grpc_resource_quota* resource_quota);
 static bool rq_reclaim_from_per_user_free_pool(
-    grpc_exec_ctx* exec_ctx, grpc_resource_quota* resource_quota);
-static bool rq_reclaim(grpc_exec_ctx* exec_ctx,
-                       grpc_resource_quota* resource_quota, bool destructive);
+    grpc_resource_quota* resource_quota);
+static bool rq_reclaim(grpc_resource_quota* resource_quota, bool destructive);
 
-static void rq_step(grpc_exec_ctx* exec_ctx, void* rq, grpc_error* error) {
+static void rq_step(void* rq, grpc_error* error) {
   grpc_resource_quota* resource_quota = (grpc_resource_quota*)rq;
   resource_quota->step_scheduled = false;
   do {
-    if (rq_alloc(exec_ctx, resource_quota)) goto done;
-  } while (rq_reclaim_from_per_user_free_pool(exec_ctx, resource_quota));
+    if (rq_alloc(resource_quota)) goto done;
+  } while (rq_reclaim_from_per_user_free_pool(resource_quota));
 
-  if (!rq_reclaim(exec_ctx, resource_quota, false)) {
-    rq_reclaim(exec_ctx, resource_quota, true);
+  if (!rq_reclaim(resource_quota, false)) {
+    rq_reclaim(resource_quota, true);
   }
 
 done:
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
 }
 
-static void rq_step_sched(grpc_exec_ctx* exec_ctx,
-                          grpc_resource_quota* resource_quota) {
+static void rq_step_sched(grpc_resource_quota* resource_quota) {
   if (resource_quota->step_scheduled) return;
   resource_quota->step_scheduled = true;
   grpc_resource_quota_ref_internal(resource_quota);
-  GRPC_CLOSURE_SCHED(exec_ctx, &resource_quota->rq_step_closure,
-                     GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(&resource_quota->rq_step_closure, GRPC_ERROR_NONE);
 }
 
 /* update the atomically available resource estimate - use no barriers since
@@ -286,8 +281,7 @@ static void rq_update_estimate(grpc_resource_quota* resource_quota) {
 }
 
 /* returns true if all allocations are completed */
-static bool rq_alloc(grpc_exec_ctx* exec_ctx,
-                     grpc_resource_quota* resource_quota) {
+static bool rq_alloc(grpc_resource_quota* resource_quota) {
   grpc_resource_user* resource_user;
   while ((resource_user = rulist_pop_head(resource_quota,
                                           GRPC_RULIST_AWAITING_ALLOCATION))) {
@@ -307,9 +301,9 @@ static bool rq_alloc(grpc_exec_ctx* exec_ctx,
       int64_t aborted_allocations = resource_user->outstanding_allocations;
       resource_user->outstanding_allocations = 0;
       resource_user->free_pool += aborted_allocations;
-      GRPC_CLOSURE_LIST_SCHED(exec_ctx, &resource_user->on_allocated);
+      GRPC_CLOSURE_LIST_SCHED(&resource_user->on_allocated);
       gpr_mu_unlock(&resource_user->mu);
-      ru_unref_by(exec_ctx, resource_user, (gpr_atm)aborted_allocations);
+      ru_unref_by(resource_user, (gpr_atm)aborted_allocations);
       continue;
     }
     if (resource_user->free_pool < 0 &&
@@ -333,7 +327,7 @@ static bool rq_alloc(grpc_exec_ctx* exec_ctx,
     if (resource_user->free_pool >= 0) {
       resource_user->allocating = false;
       resource_user->outstanding_allocations = 0;
-      GRPC_CLOSURE_LIST_SCHED(exec_ctx, &resource_user->on_allocated);
+      GRPC_CLOSURE_LIST_SCHED(&resource_user->on_allocated);
       gpr_mu_unlock(&resource_user->mu);
     } else {
       rulist_add_head(resource_user, GRPC_RULIST_AWAITING_ALLOCATION);
@@ -346,7 +340,7 @@ static bool rq_alloc(grpc_exec_ctx* exec_ctx,
 
 /* returns true if any memory could be reclaimed from buffers */
 static bool rq_reclaim_from_per_user_free_pool(
-    grpc_exec_ctx* exec_ctx, grpc_resource_quota* resource_quota) {
+    grpc_resource_quota* resource_quota) {
   grpc_resource_user* resource_user;
   while ((resource_user = rulist_pop_head(resource_quota,
                                           GRPC_RULIST_NON_EMPTY_FREE_POOL))) {
@@ -373,8 +367,7 @@ static bool rq_reclaim_from_per_user_free_pool(
 }
 
 /* returns true if reclamation is proceeding */
-static bool rq_reclaim(grpc_exec_ctx* exec_ctx,
-                       grpc_resource_quota* resource_quota, bool destructive) {
+static bool rq_reclaim(grpc_resource_quota* resource_quota, bool destructive) {
   if (resource_quota->reclaiming) return true;
   grpc_rulist list = destructive ? GRPC_RULIST_RECLAIMER_DESTRUCTIVE
                                  : GRPC_RULIST_RECLAIMER_BENIGN;
@@ -392,7 +385,7 @@ static bool rq_reclaim(grpc_exec_ctx* exec_ctx,
   resource_quota->debug_only_last_reclaimer_resource_user = resource_user;
   resource_quota->debug_only_last_initiated_reclaimer = c;
   resource_user->reclaimers[destructive] = nullptr;
-  GRPC_CLOSURE_RUN(exec_ctx, c, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_RUN(c, GRPC_ERROR_NONE);
   return true;
 }
 
@@ -412,10 +405,10 @@ static void ru_slice_ref(void* p) {
   gpr_ref(&rc->refs);
 }
 
-static void ru_slice_unref(grpc_exec_ctx* exec_ctx, void* p) {
+static void ru_slice_unref(void* p) {
   ru_slice_refcount* rc = (ru_slice_refcount*)p;
   if (gpr_unref(&rc->refs)) {
-    grpc_resource_user_free(exec_ctx, rc->resource_user, rc->size);
+    grpc_resource_user_free(rc->resource_user, rc->size);
     gpr_free(rc);
   }
 }
@@ -445,61 +438,57 @@ static grpc_slice ru_slice_create(grpc_resource_user* resource_user,
  * the combiner
  */
 
-static void ru_allocate(grpc_exec_ctx* exec_ctx, void* ru, grpc_error* error) {
+static void ru_allocate(void* ru, grpc_error* error) {
   grpc_resource_user* resource_user = (grpc_resource_user*)ru;
   if (rulist_empty(resource_user->resource_quota,
                    GRPC_RULIST_AWAITING_ALLOCATION)) {
-    rq_step_sched(exec_ctx, resource_user->resource_quota);
+    rq_step_sched(resource_user->resource_quota);
   }
   rulist_add_tail(resource_user, GRPC_RULIST_AWAITING_ALLOCATION);
 }
 
-static void ru_add_to_free_pool(grpc_exec_ctx* exec_ctx, void* ru,
-                                grpc_error* error) {
+static void ru_add_to_free_pool(void* ru, grpc_error* error) {
   grpc_resource_user* resource_user = (grpc_resource_user*)ru;
   if (!rulist_empty(resource_user->resource_quota,
                     GRPC_RULIST_AWAITING_ALLOCATION) &&
       rulist_empty(resource_user->resource_quota,
                    GRPC_RULIST_NON_EMPTY_FREE_POOL)) {
-    rq_step_sched(exec_ctx, resource_user->resource_quota);
+    rq_step_sched(resource_user->resource_quota);
   }
   rulist_add_tail(resource_user, GRPC_RULIST_NON_EMPTY_FREE_POOL);
 }
 
-static bool ru_post_reclaimer(grpc_exec_ctx* exec_ctx,
-                              grpc_resource_user* resource_user,
+static bool ru_post_reclaimer(grpc_resource_user* resource_user,
                               bool destructive) {
   grpc_closure* closure = resource_user->new_reclaimers[destructive];
   GPR_ASSERT(closure != nullptr);
   resource_user->new_reclaimers[destructive] = nullptr;
   GPR_ASSERT(resource_user->reclaimers[destructive] == nullptr);
   if (gpr_atm_acq_load(&resource_user->shutdown) > 0) {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_CANCELLED);
+    GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_CANCELLED);
     return false;
   }
   resource_user->reclaimers[destructive] = closure;
   return true;
 }
 
-static void ru_post_benign_reclaimer(grpc_exec_ctx* exec_ctx, void* ru,
-                                     grpc_error* error) {
+static void ru_post_benign_reclaimer(void* ru, grpc_error* error) {
   grpc_resource_user* resource_user = (grpc_resource_user*)ru;
-  if (!ru_post_reclaimer(exec_ctx, resource_user, false)) return;
+  if (!ru_post_reclaimer(resource_user, false)) return;
   if (!rulist_empty(resource_user->resource_quota,
                     GRPC_RULIST_AWAITING_ALLOCATION) &&
       rulist_empty(resource_user->resource_quota,
                    GRPC_RULIST_NON_EMPTY_FREE_POOL) &&
       rulist_empty(resource_user->resource_quota,
                    GRPC_RULIST_RECLAIMER_BENIGN)) {
-    rq_step_sched(exec_ctx, resource_user->resource_quota);
+    rq_step_sched(resource_user->resource_quota);
   }
   rulist_add_tail(resource_user, GRPC_RULIST_RECLAIMER_BENIGN);
 }
 
-static void ru_post_destructive_reclaimer(grpc_exec_ctx* exec_ctx, void* ru,
-                                          grpc_error* error) {
+static void ru_post_destructive_reclaimer(void* ru, grpc_error* error) {
   grpc_resource_user* resource_user = (grpc_resource_user*)ru;
-  if (!ru_post_reclaimer(exec_ctx, resource_user, true)) return;
+  if (!ru_post_reclaimer(resource_user, true)) return;
   if (!rulist_empty(resource_user->resource_quota,
                     GRPC_RULIST_AWAITING_ALLOCATION) &&
       rulist_empty(resource_user->resource_quota,
@@ -508,51 +497,46 @@ static void ru_post_destructive_reclaimer(grpc_exec_ctx* exec_ctx, void* ru,
                    GRPC_RULIST_RECLAIMER_BENIGN) &&
       rulist_empty(resource_user->resource_quota,
                    GRPC_RULIST_RECLAIMER_DESTRUCTIVE)) {
-    rq_step_sched(exec_ctx, resource_user->resource_quota);
+    rq_step_sched(resource_user->resource_quota);
   }
   rulist_add_tail(resource_user, GRPC_RULIST_RECLAIMER_DESTRUCTIVE);
 }
 
-static void ru_shutdown(grpc_exec_ctx* exec_ctx, void* ru, grpc_error* error) {
+static void ru_shutdown(void* ru, grpc_error* error) {
   if (grpc_resource_quota_trace.enabled()) {
     gpr_log(GPR_DEBUG, "RU shutdown %p", ru);
   }
   grpc_resource_user* resource_user = (grpc_resource_user*)ru;
-  GRPC_CLOSURE_SCHED(exec_ctx, resource_user->reclaimers[0],
-                     GRPC_ERROR_CANCELLED);
-  GRPC_CLOSURE_SCHED(exec_ctx, resource_user->reclaimers[1],
-                     GRPC_ERROR_CANCELLED);
+  GRPC_CLOSURE_SCHED(resource_user->reclaimers[0], GRPC_ERROR_CANCELLED);
+  GRPC_CLOSURE_SCHED(resource_user->reclaimers[1], GRPC_ERROR_CANCELLED);
   resource_user->reclaimers[0] = nullptr;
   resource_user->reclaimers[1] = nullptr;
   rulist_remove(resource_user, GRPC_RULIST_RECLAIMER_BENIGN);
   rulist_remove(resource_user, GRPC_RULIST_RECLAIMER_DESTRUCTIVE);
   if (resource_user->allocating) {
-    rq_step_sched(exec_ctx, resource_user->resource_quota);
+    rq_step_sched(resource_user->resource_quota);
   }
 }
 
-static void ru_destroy(grpc_exec_ctx* exec_ctx, void* ru, grpc_error* error) {
+static void ru_destroy(void* ru, grpc_error* error) {
   grpc_resource_user* resource_user = (grpc_resource_user*)ru;
   GPR_ASSERT(gpr_atm_no_barrier_load(&resource_user->refs) == 0);
   for (int i = 0; i < GRPC_RULIST_COUNT; i++) {
     rulist_remove(resource_user, (grpc_rulist)i);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, resource_user->reclaimers[0],
-                     GRPC_ERROR_CANCELLED);
-  GRPC_CLOSURE_SCHED(exec_ctx, resource_user->reclaimers[1],
-                     GRPC_ERROR_CANCELLED);
+  GRPC_CLOSURE_SCHED(resource_user->reclaimers[0], GRPC_ERROR_CANCELLED);
+  GRPC_CLOSURE_SCHED(resource_user->reclaimers[1], GRPC_ERROR_CANCELLED);
   if (resource_user->free_pool != 0) {
     resource_user->resource_quota->free_pool += resource_user->free_pool;
-    rq_step_sched(exec_ctx, resource_user->resource_quota);
+    rq_step_sched(resource_user->resource_quota);
   }
-  grpc_resource_quota_unref_internal(exec_ctx, resource_user->resource_quota);
+  grpc_resource_quota_unref_internal(resource_user->resource_quota);
   gpr_mu_destroy(&resource_user->mu);
   gpr_free(resource_user->name);
   gpr_free(resource_user);
 }
 
-static void ru_allocated_slices(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_error* error) {
+static void ru_allocated_slices(void* arg, grpc_error* error) {
   grpc_resource_user_slice_allocator* slice_allocator =
       (grpc_resource_user_slice_allocator*)arg;
   if (error == GRPC_ERROR_NONE) {
@@ -562,7 +546,7 @@ static void ru_allocated_slices(grpc_exec_ctx* exec_ctx, void* arg,
                                                  slice_allocator->length));
     }
   }
-  GRPC_CLOSURE_RUN(exec_ctx, &slice_allocator->on_done, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(&slice_allocator->on_done, GRPC_ERROR_REF(error));
 }
 
 /*******************************************************************************
@@ -576,23 +560,22 @@ typedef struct {
   grpc_closure closure;
 } rq_resize_args;
 
-static void rq_resize(grpc_exec_ctx* exec_ctx, void* args, grpc_error* error) {
+static void rq_resize(void* args, grpc_error* error) {
   rq_resize_args* a = (rq_resize_args*)args;
   int64_t delta = a->size - a->resource_quota->size;
   a->resource_quota->size += delta;
   a->resource_quota->free_pool += delta;
   rq_update_estimate(a->resource_quota);
-  rq_step_sched(exec_ctx, a->resource_quota);
-  grpc_resource_quota_unref_internal(exec_ctx, a->resource_quota);
+  rq_step_sched(a->resource_quota);
+  grpc_resource_quota_unref_internal(a->resource_quota);
   gpr_free(a);
 }
 
-static void rq_reclamation_done(grpc_exec_ctx* exec_ctx, void* rq,
-                                grpc_error* error) {
+static void rq_reclamation_done(void* rq, grpc_error* error) {
   grpc_resource_quota* resource_quota = (grpc_resource_quota*)rq;
   resource_quota->reclaiming = false;
-  rq_step_sched(exec_ctx, resource_quota);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  rq_step_sched(resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
 }
 
 /*******************************************************************************
@@ -628,10 +611,9 @@ grpc_resource_quota* grpc_resource_quota_create(const char* name) {
   return resource_quota;
 }
 
-void grpc_resource_quota_unref_internal(grpc_exec_ctx* exec_ctx,
-                                        grpc_resource_quota* resource_quota) {
+void grpc_resource_quota_unref_internal(grpc_resource_quota* resource_quota) {
   if (gpr_unref(&resource_quota->refs)) {
-    GRPC_COMBINER_UNREF(exec_ctx, resource_quota->combiner, "resource_quota");
+    GRPC_COMBINER_UNREF(resource_quota->combiner, "resource_quota");
     gpr_free(resource_quota->name);
     gpr_free(resource_quota);
   }
@@ -639,9 +621,8 @@ void grpc_resource_quota_unref_internal(grpc_exec_ctx* exec_ctx,
 
 /* Public API */
 void grpc_resource_quota_unref(grpc_resource_quota* resource_quota) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_resource_quota_unref_internal(resource_quota);
 }
 
 grpc_resource_quota* grpc_resource_quota_ref_internal(
@@ -665,15 +646,14 @@ double grpc_resource_quota_get_memory_pressure(
 /* Public API */
 void grpc_resource_quota_resize(grpc_resource_quota* resource_quota,
                                 size_t size) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   rq_resize_args* a = (rq_resize_args*)gpr_malloc(sizeof(*a));
   a->resource_quota = grpc_resource_quota_ref_internal(resource_quota);
   a->size = (int64_t)size;
   gpr_atm_no_barrier_store(&resource_quota->last_size,
                            (gpr_atm)GPR_MIN((size_t)GPR_ATM_MAX, size));
   GRPC_CLOSURE_INIT(&a->closure, rq_resize, a, grpc_schedule_on_exec_ctx);
-  GRPC_CLOSURE_SCHED(&exec_ctx, &a->closure, GRPC_ERROR_NONE);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CLOSURE_SCHED(&a->closure, GRPC_ERROR_NONE);
 }
 
 size_t grpc_resource_quota_peek_size(grpc_resource_quota* resource_quota) {
@@ -704,8 +684,8 @@ static void* rq_copy(void* rq) {
   return rq;
 }
 
-static void rq_destroy(grpc_exec_ctx* exec_ctx, void* rq) {
-  grpc_resource_quota_unref_internal(exec_ctx, (grpc_resource_quota*)rq);
+static void rq_destroy(void* rq) {
+  grpc_resource_quota_unref_internal((grpc_resource_quota*)rq);
 }
 
 static int rq_cmp(void* a, void* b) { return GPR_ICMP(a, b); }
@@ -773,14 +753,12 @@ static void ru_ref_by(grpc_resource_user* resource_user, gpr_atm amount) {
   GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&resource_user->refs, amount) != 0);
 }
 
-static void ru_unref_by(grpc_exec_ctx* exec_ctx,
-                        grpc_resource_user* resource_user, gpr_atm amount) {
+static void ru_unref_by(grpc_resource_user* resource_user, gpr_atm amount) {
   GPR_ASSERT(amount > 0);
   gpr_atm old = gpr_atm_full_fetch_add(&resource_user->refs, -amount);
   GPR_ASSERT(old >= amount);
   if (old == amount) {
-    GRPC_CLOSURE_SCHED(exec_ctx, &resource_user->destroy_closure,
-                       GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&resource_user->destroy_closure, GRPC_ERROR_NONE);
   }
 }
 
@@ -788,16 +766,13 @@ void grpc_resource_user_ref(grpc_resource_user* resource_user) {
   ru_ref_by(resource_user, 1);
 }
 
-void grpc_resource_user_unref(grpc_exec_ctx* exec_ctx,
-                              grpc_resource_user* resource_user) {
-  ru_unref_by(exec_ctx, resource_user, 1);
+void grpc_resource_user_unref(grpc_resource_user* resource_user) {
+  ru_unref_by(resource_user, 1);
 }
 
-void grpc_resource_user_shutdown(grpc_exec_ctx* exec_ctx,
-                                 grpc_resource_user* resource_user) {
+void grpc_resource_user_shutdown(grpc_resource_user* resource_user) {
   if (gpr_atm_full_fetch_add(&resource_user->shutdown, 1) == 0) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_CREATE(
             ru_shutdown, resource_user,
             grpc_combiner_scheduler(resource_user->resource_quota->combiner)),
@@ -805,8 +780,7 @@ void grpc_resource_user_shutdown(grpc_exec_ctx* exec_ctx,
   }
 }
 
-void grpc_resource_user_alloc(grpc_exec_ctx* exec_ctx,
-                              grpc_resource_user* resource_user, size_t size,
+void grpc_resource_user_alloc(grpc_resource_user* resource_user, size_t size,
                               grpc_closure* optional_on_done) {
   gpr_mu_lock(&resource_user->mu);
   ru_ref_by(resource_user, (gpr_atm)size);
@@ -822,18 +796,16 @@ void grpc_resource_user_alloc(grpc_exec_ctx* exec_ctx,
                              GRPC_ERROR_NONE);
     if (!resource_user->allocating) {
       resource_user->allocating = true;
-      GRPC_CLOSURE_SCHED(exec_ctx, &resource_user->allocate_closure,
-                         GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(&resource_user->allocate_closure, GRPC_ERROR_NONE);
     }
   } else {
     resource_user->outstanding_allocations -= (int64_t)size;
-    GRPC_CLOSURE_SCHED(exec_ctx, optional_on_done, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(optional_on_done, GRPC_ERROR_NONE);
   }
   gpr_mu_unlock(&resource_user->mu);
 }
 
-void grpc_resource_user_free(grpc_exec_ctx* exec_ctx,
-                             grpc_resource_user* resource_user, size_t size) {
+void grpc_resource_user_free(grpc_resource_user* resource_user, size_t size) {
   gpr_mu_lock(&resource_user->mu);
   bool was_zero_or_negative = resource_user->free_pool <= 0;
   resource_user->free_pool += (int64_t)size;
@@ -846,32 +818,29 @@ void grpc_resource_user_free(grpc_exec_ctx* exec_ctx,
   if (is_bigger_than_zero && was_zero_or_negative &&
       !resource_user->added_to_free_pool) {
     resource_user->added_to_free_pool = true;
-    GRPC_CLOSURE_SCHED(exec_ctx, &resource_user->add_to_free_pool_closure,
+    GRPC_CLOSURE_SCHED(&resource_user->add_to_free_pool_closure,
                        GRPC_ERROR_NONE);
   }
   gpr_mu_unlock(&resource_user->mu);
-  ru_unref_by(exec_ctx, resource_user, (gpr_atm)size);
+  ru_unref_by(resource_user, (gpr_atm)size);
 }
 
-void grpc_resource_user_post_reclaimer(grpc_exec_ctx* exec_ctx,
-                                       grpc_resource_user* resource_user,
+void grpc_resource_user_post_reclaimer(grpc_resource_user* resource_user,
                                        bool destructive,
                                        grpc_closure* closure) {
   GPR_ASSERT(resource_user->new_reclaimers[destructive] == nullptr);
   resource_user->new_reclaimers[destructive] = closure;
-  GRPC_CLOSURE_SCHED(exec_ctx,
-                     &resource_user->post_reclaimer_closure[destructive],
+  GRPC_CLOSURE_SCHED(&resource_user->post_reclaimer_closure[destructive],
                      GRPC_ERROR_NONE);
 }
 
-void grpc_resource_user_finish_reclamation(grpc_exec_ctx* exec_ctx,
-                                           grpc_resource_user* resource_user) {
+void grpc_resource_user_finish_reclamation(grpc_resource_user* resource_user) {
   if (grpc_resource_quota_trace.enabled()) {
     gpr_log(GPR_DEBUG, "RQ %s %s: reclamation complete",
             resource_user->resource_quota->name, resource_user->name);
   }
   GRPC_CLOSURE_SCHED(
-      exec_ctx, &resource_user->resource_quota->rq_reclamation_done_closure,
+      &resource_user->resource_quota->rq_reclamation_done_closure,
       GRPC_ERROR_NONE);
 }
 
@@ -886,12 +855,11 @@ void grpc_resource_user_slice_allocator_init(
 }
 
 void grpc_resource_user_alloc_slices(
-    grpc_exec_ctx* exec_ctx,
     grpc_resource_user_slice_allocator* slice_allocator, size_t length,
     size_t count, grpc_slice_buffer* dest) {
   slice_allocator->length = length;
   slice_allocator->count = count;
   slice_allocator->dest = dest;
-  grpc_resource_user_alloc(exec_ctx, slice_allocator->resource_user,
-                           count * length, &slice_allocator->on_allocated);
+  grpc_resource_user_alloc(slice_allocator->resource_user, count * length,
+                           &slice_allocator->on_allocated);
 }
diff --git a/src/core/lib/iomgr/resource_quota.h b/src/core/lib/iomgr/resource_quota.h
index 787370307a..39e3aabf18 100644
--- a/src/core/lib/iomgr/resource_quota.h
+++ b/src/core/lib/iomgr/resource_quota.h
@@ -65,8 +65,7 @@ extern grpc_core::TraceFlag grpc_resource_quota_trace;
 
 grpc_resource_quota* grpc_resource_quota_ref_internal(
     grpc_resource_quota* resource_quota);
-void grpc_resource_quota_unref_internal(grpc_exec_ctx* exec_ctx,
-                                        grpc_resource_quota* resource_quota);
+void grpc_resource_quota_unref_internal(grpc_resource_quota* resource_quota);
 grpc_resource_quota* grpc_resource_quota_from_channel_args(
     const grpc_channel_args* channel_args);
 
@@ -89,32 +88,26 @@ grpc_resource_quota* grpc_resource_user_quota(
     grpc_resource_user* resource_user);
 
 void grpc_resource_user_ref(grpc_resource_user* resource_user);
-void grpc_resource_user_unref(grpc_exec_ctx* exec_ctx,
-                              grpc_resource_user* resource_user);
-void grpc_resource_user_shutdown(grpc_exec_ctx* exec_ctx,
-                                 grpc_resource_user* resource_user);
+void grpc_resource_user_unref(grpc_resource_user* resource_user);
+void grpc_resource_user_shutdown(grpc_resource_user* resource_user);
 
 /* Allocate from the resource user (and its quota).
    If optional_on_done is NULL, then allocate immediately. This may push the
    quota over-limit, at which point reclamation will kick in.
    If optional_on_done is non-NULL, it will be scheduled when the allocation has
    been granted by the quota. */
-void grpc_resource_user_alloc(grpc_exec_ctx* exec_ctx,
-                              grpc_resource_user* resource_user, size_t size,
+void grpc_resource_user_alloc(grpc_resource_user* resource_user, size_t size,
                               grpc_closure* optional_on_done);
 /* Release memory back to the quota */
-void grpc_resource_user_free(grpc_exec_ctx* exec_ctx,
-                             grpc_resource_user* resource_user, size_t size);
+void grpc_resource_user_free(grpc_resource_user* resource_user, size_t size);
 /* Post a memory reclaimer to the resource user. Only one benign and one
    destructive reclaimer can be posted at once. When executed, the reclaimer
    MUST call grpc_resource_user_finish_reclamation before it completes, to
    return control to the resource quota. */
-void grpc_resource_user_post_reclaimer(grpc_exec_ctx* exec_ctx,
-                                       grpc_resource_user* resource_user,
+void grpc_resource_user_post_reclaimer(grpc_resource_user* resource_user,
                                        bool destructive, grpc_closure* closure);
 /* Finish a reclamation step */
-void grpc_resource_user_finish_reclamation(grpc_exec_ctx* exec_ctx,
-                                           grpc_resource_user* resource_user);
+void grpc_resource_user_finish_reclamation(grpc_resource_user* resource_user);
 
 /* Helper to allocate slices from a resource user */
 typedef struct grpc_resource_user_slice_allocator {
@@ -141,13 +134,11 @@ void grpc_resource_user_slice_allocator_init(
 /* Allocate \a count slices of length \a length into \a dest. Only one request
    can be outstanding at a time. */
 void grpc_resource_user_alloc_slices(
-    grpc_exec_ctx* exec_ctx,
     grpc_resource_user_slice_allocator* slice_allocator, size_t length,
     size_t count, grpc_slice_buffer* dest);
 
 /* Allocate one slice of length \a size synchronously. */
-grpc_slice grpc_resource_user_slice_malloc(grpc_exec_ctx* exec_ctx,
-                                           grpc_resource_user* resource_user,
+grpc_slice grpc_resource_user_slice_malloc(grpc_resource_user* resource_user,
                                            size_t size);
 
 #endif /* GRPC_CORE_LIB_IOMGR_RESOURCE_QUOTA_H */
diff --git a/src/core/lib/iomgr/socket_factory_posix.cc b/src/core/lib/iomgr/socket_factory_posix.cc
index 40bfecd4c2..bc7d0b12f3 100644
--- a/src/core/lib/iomgr/socket_factory_posix.cc
+++ b/src/core/lib/iomgr/socket_factory_posix.cc
@@ -72,7 +72,7 @@ static void* socket_factory_arg_copy(void* p) {
   return grpc_socket_factory_ref((grpc_socket_factory*)p);
 }
 
-static void socket_factory_arg_destroy(grpc_exec_ctx* exec_ctx, void* p) {
+static void socket_factory_arg_destroy(void* p) {
   grpc_socket_factory_unref((grpc_socket_factory*)p);
 }
 
diff --git a/src/core/lib/iomgr/socket_mutator.cc b/src/core/lib/iomgr/socket_mutator.cc
index ff6c0c70d8..9d30e46b6b 100644
--- a/src/core/lib/iomgr/socket_mutator.cc
+++ b/src/core/lib/iomgr/socket_mutator.cc
@@ -63,7 +63,7 @@ static void* socket_mutator_arg_copy(void* p) {
   return grpc_socket_mutator_ref((grpc_socket_mutator*)p);
 }
 
-static void socket_mutator_arg_destroy(grpc_exec_ctx* exec_ctx, void* p) {
+static void socket_mutator_arg_destroy(void* p) {
   grpc_socket_mutator_unref((grpc_socket_mutator*)p);
 }
 
diff --git a/src/core/lib/iomgr/socket_windows.cc b/src/core/lib/iomgr/socket_windows.cc
index aee80f4b4c..9bb6a75dd8 100644
--- a/src/core/lib/iomgr/socket_windows.cc
+++ b/src/core/lib/iomgr/socket_windows.cc
@@ -109,37 +109,34 @@ void grpc_winsocket_destroy(grpc_winsocket* winsocket) {
 -) The IOCP already completed in the background, and we need to call
 the callback now.
 -) The IOCP hasn't completed yet, and we're queuing it for later. */
-static void socket_notify_on_iocp(grpc_exec_ctx* exec_ctx,
-                                  grpc_winsocket* socket, grpc_closure* closure,
+static void socket_notify_on_iocp(grpc_winsocket* socket, grpc_closure* closure,
                                   grpc_winsocket_callback_info* info) {
   GPR_ASSERT(info->closure == NULL);
   gpr_mu_lock(&socket->state_mu);
   if (info->has_pending_iocp) {
     info->has_pending_iocp = 0;
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
   } else {
     info->closure = closure;
   }
   gpr_mu_unlock(&socket->state_mu);
 }
 
-void grpc_socket_notify_on_write(grpc_exec_ctx* exec_ctx,
-                                 grpc_winsocket* socket,
+void grpc_socket_notify_on_write(grpc_winsocket* socket,
                                  grpc_closure* closure) {
-  socket_notify_on_iocp(exec_ctx, socket, closure, &socket->write_info);
+  socket_notify_on_iocp(socket, closure, &socket->write_info);
 }
 
-void grpc_socket_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_winsocket* socket,
-                                grpc_closure* closure) {
-  socket_notify_on_iocp(exec_ctx, socket, closure, &socket->read_info);
+void grpc_socket_notify_on_read(grpc_winsocket* socket, grpc_closure* closure) {
+  socket_notify_on_iocp(socket, closure, &socket->read_info);
 }
 
-void grpc_socket_become_ready(grpc_exec_ctx* exec_ctx, grpc_winsocket* socket,
+void grpc_socket_become_ready(grpc_winsocket* socket,
                               grpc_winsocket_callback_info* info) {
   GPR_ASSERT(!info->has_pending_iocp);
   gpr_mu_lock(&socket->state_mu);
   if (info->closure) {
-    GRPC_CLOSURE_SCHED(exec_ctx, info->closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(info->closure, GRPC_ERROR_NONE);
     info->closure = NULL;
   } else {
     info->has_pending_iocp = 1;
diff --git a/src/core/lib/iomgr/socket_windows.h b/src/core/lib/iomgr/socket_windows.h
index 04e0a89d70..cb28f2b8df 100644
--- a/src/core/lib/iomgr/socket_windows.h
+++ b/src/core/lib/iomgr/socket_windows.h
@@ -98,16 +98,13 @@ void grpc_winsocket_shutdown(grpc_winsocket* socket);
 /* Destroy a socket. Should only be called if there's no pending operation. */
 void grpc_winsocket_destroy(grpc_winsocket* socket);
 
-void grpc_socket_notify_on_write(grpc_exec_ctx* exec_ctx,
-                                 grpc_winsocket* winsocket,
+void grpc_socket_notify_on_write(grpc_winsocket* winsocket,
                                  grpc_closure* closure);
 
-void grpc_socket_notify_on_read(grpc_exec_ctx* exec_ctx,
-                                grpc_winsocket* winsocket,
+void grpc_socket_notify_on_read(grpc_winsocket* winsocket,
                                 grpc_closure* closure);
 
-void grpc_socket_become_ready(grpc_exec_ctx* exec_ctx,
-                              grpc_winsocket* winsocket,
+void grpc_socket_become_ready(grpc_winsocket* winsocket,
                               grpc_winsocket_callback_info* ci);
 
 #endif
diff --git a/src/core/lib/iomgr/tcp_client.h b/src/core/lib/iomgr/tcp_client.h
index 75e2fe0f36..5f55d30955 100644
--- a/src/core/lib/iomgr/tcp_client.h
+++ b/src/core/lib/iomgr/tcp_client.h
@@ -30,8 +30,7 @@
    NULL on failure).
    interested_parties points to a set of pollsets that would be interested
    in this connection being established (in order to continue their work) */
-void grpc_tcp_client_connect(grpc_exec_ctx* exec_ctx, grpc_closure* on_connect,
-                             grpc_endpoint** endpoint,
+void grpc_tcp_client_connect(grpc_closure* on_connect, grpc_endpoint** endpoint,
                              grpc_pollset_set* interested_parties,
                              const grpc_channel_args* channel_args,
                              const grpc_resolved_address* addr,
diff --git a/src/core/lib/iomgr/tcp_client_posix.cc b/src/core/lib/iomgr/tcp_client_posix.cc
index 4cb2ac49d5..24ccab14b2 100644
--- a/src/core/lib/iomgr/tcp_client_posix.cc
+++ b/src/core/lib/iomgr/tcp_client_posix.cc
@@ -96,7 +96,7 @@ done:
   return err;
 }
 
-static void tc_on_alarm(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
+static void tc_on_alarm(void* acp, grpc_error* error) {
   int done;
   async_connect* ac = (async_connect*)acp;
   if (grpc_tcp_trace.enabled()) {
@@ -107,26 +107,24 @@ static void tc_on_alarm(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
   gpr_mu_lock(&ac->mu);
   if (ac->fd != nullptr) {
     grpc_fd_shutdown(
-        exec_ctx, ac->fd,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("connect() timed out"));
+        ac->fd, GRPC_ERROR_CREATE_FROM_STATIC_STRING("connect() timed out"));
   }
   done = (--ac->refs == 0);
   gpr_mu_unlock(&ac->mu);
   if (done) {
     gpr_mu_destroy(&ac->mu);
     gpr_free(ac->addr_str);
-    grpc_channel_args_destroy(exec_ctx, ac->channel_args);
+    grpc_channel_args_destroy(ac->channel_args);
     gpr_free(ac);
   }
 }
 
 grpc_endpoint* grpc_tcp_client_create_from_fd(
-    grpc_exec_ctx* exec_ctx, grpc_fd* fd, const grpc_channel_args* channel_args,
-    const char* addr_str) {
-  return grpc_tcp_create(exec_ctx, fd, channel_args, addr_str);
+    grpc_fd* fd, const grpc_channel_args* channel_args, const char* addr_str) {
+  return grpc_tcp_create(fd, channel_args, addr_str);
 }
 
-static void on_writable(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
+static void on_writable(void* acp, grpc_error* error) {
   async_connect* ac = (async_connect*)acp;
   int so_error = 0;
   socklen_t so_error_size;
@@ -150,7 +148,7 @@ static void on_writable(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
   ac->fd = nullptr;
   gpr_mu_unlock(&ac->mu);
 
-  grpc_timer_cancel(exec_ctx, &ac->alarm);
+  grpc_timer_cancel(&ac->alarm);
 
   gpr_mu_lock(&ac->mu);
   if (error != GRPC_ERROR_NONE) {
@@ -172,9 +170,8 @@ static void on_writable(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
 
   switch (so_error) {
     case 0:
-      grpc_pollset_set_del_fd(exec_ctx, ac->interested_parties, fd);
-      *ep = grpc_tcp_client_create_from_fd(exec_ctx, fd, ac->channel_args,
-                                           ac->addr_str);
+      grpc_pollset_set_del_fd(ac->interested_parties, fd);
+      *ep = grpc_tcp_client_create_from_fd(fd, ac->channel_args, ac->addr_str);
       fd = nullptr;
       break;
     case ENOBUFS:
@@ -194,7 +191,7 @@ static void on_writable(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
          don't do that! */
       gpr_log(GPR_ERROR, "kernel out of buffers");
       gpr_mu_unlock(&ac->mu);
-      grpc_fd_notify_on_write(exec_ctx, fd, &ac->write_closure);
+      grpc_fd_notify_on_write(fd, &ac->write_closure);
       return;
     case ECONNREFUSED:
       /* This error shouldn't happen for anything other than connect(). */
@@ -209,8 +206,8 @@ static void on_writable(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
 
 finish:
   if (fd != nullptr) {
-    grpc_pollset_set_del_fd(exec_ctx, ac->interested_parties, fd);
-    grpc_fd_orphan(exec_ctx, fd, nullptr, nullptr, false /* already_closed */,
+    grpc_pollset_set_del_fd(ac->interested_parties, fd);
+    grpc_fd_orphan(fd, nullptr, nullptr, false /* already_closed */,
                    "tcp_client_orphan");
     fd = nullptr;
   }
@@ -233,84 +230,84 @@ finish:
   if (done) {
     gpr_mu_destroy(&ac->mu);
     gpr_free(ac->addr_str);
-    grpc_channel_args_destroy(exec_ctx, ac->channel_args);
+    grpc_channel_args_destroy(ac->channel_args);
     gpr_free(ac);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, closure, error);
+  GRPC_CLOSURE_SCHED(closure, error);
 }
 
-static void tcp_client_connect_impl(grpc_exec_ctx* exec_ctx,
-                                    grpc_closure* closure, grpc_endpoint** ep,
-                                    grpc_pollset_set* interested_parties,
-                                    const grpc_channel_args* channel_args,
-                                    const grpc_resolved_address* addr,
-                                    grpc_millis deadline) {
-  int fd;
+grpc_error* grpc_tcp_client_prepare_fd(const grpc_channel_args* channel_args,
+                                       const grpc_resolved_address* addr,
+                                       grpc_resolved_address* mapped_addr,
+                                       grpc_fd** fdobj) {
   grpc_dualstack_mode dsmode;
-  int err;
-  async_connect* ac;
-  grpc_resolved_address addr6_v4mapped;
-  grpc_resolved_address addr4_copy;
-  grpc_fd* fdobj;
+  int fd;
+  grpc_error* error;
   char* name;
   char* addr_str;
-  grpc_error* error;
-
-  *ep = nullptr;
-
-  /* Use dualstack sockets where available. */
-  if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
-    addr = &addr6_v4mapped;
+  *fdobj = nullptr;
+  /* Use dualstack sockets where available. Set mapped to v6 or v4 mapped to
+     v6. */
+  if (!grpc_sockaddr_to_v4mapped(addr, mapped_addr)) {
+    /* addr is v4 mapped to v6 or v6. */
+    memcpy(mapped_addr, addr, sizeof(*mapped_addr));
   }
-
-  error = grpc_create_dualstack_socket(addr, SOCK_STREAM, 0, &dsmode, &fd);
+  error =
+      grpc_create_dualstack_socket(mapped_addr, SOCK_STREAM, 0, &dsmode, &fd);
   if (error != GRPC_ERROR_NONE) {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, error);
-    return;
+    return error;
   }
   if (dsmode == GRPC_DSMODE_IPV4) {
-    /* If we got an AF_INET socket, map the address back to IPv4. */
-    GPR_ASSERT(grpc_sockaddr_is_v4mapped(addr, &addr4_copy));
-    addr = &addr4_copy;
+    /* Original addr is either v4 or v4 mapped to v6. Set mapped_addr to v4. */
+    if (!grpc_sockaddr_is_v4mapped(addr, mapped_addr)) {
+      memcpy(mapped_addr, addr, sizeof(*mapped_addr));
+    }
   }
-  if ((error = prepare_socket(addr, fd, channel_args)) != GRPC_ERROR_NONE) {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, error);
-    return;
+  if ((error = prepare_socket(mapped_addr, fd, channel_args)) !=
+      GRPC_ERROR_NONE) {
+    return error;
   }
+  addr_str = grpc_sockaddr_to_uri(mapped_addr);
+  gpr_asprintf(&name, "tcp-client:%s", addr_str);
+  *fdobj = grpc_fd_create(fd, name);
+  gpr_free(name);
+  gpr_free(addr_str);
+  return GRPC_ERROR_NONE;
+}
 
+void grpc_tcp_client_create_from_prepared_fd(
+    grpc_pollset_set* interested_parties, grpc_closure* closure, grpc_fd* fdobj,
+    const grpc_channel_args* channel_args, const grpc_resolved_address* addr,
+    grpc_millis deadline, grpc_endpoint** ep) {
+  const int fd = grpc_fd_wrapped_fd(fdobj);
+  int err;
+  async_connect* ac;
   do {
     GPR_ASSERT(addr->len < ~(socklen_t)0);
     err = connect(fd, (const struct sockaddr*)addr->addr, (socklen_t)addr->len);
   } while (err < 0 && errno == EINTR);
-
-  addr_str = grpc_sockaddr_to_uri(addr);
-  gpr_asprintf(&name, "tcp-client:%s", addr_str);
-
-  fdobj = grpc_fd_create(fd, name);
-
   if (err >= 0) {
-    *ep =
-        grpc_tcp_client_create_from_fd(exec_ctx, fdobj, channel_args, addr_str);
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
-    goto done;
+    char* addr_str = grpc_sockaddr_to_uri(addr);
+    *ep = grpc_tcp_client_create_from_fd(fdobj, channel_args, addr_str);
+    gpr_free(addr_str);
+    GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
+    return;
   }
-
   if (errno != EWOULDBLOCK && errno != EINPROGRESS) {
-    grpc_fd_orphan(exec_ctx, fdobj, nullptr, nullptr,
-                   false /* already_closed */, "tcp_client_connect_error");
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_OS_ERROR(errno, "connect"));
-    goto done;
+    grpc_fd_orphan(fdobj, nullptr, nullptr, false /* already_closed */,
+                   "tcp_client_connect_error");
+    GRPC_CLOSURE_SCHED(closure, GRPC_OS_ERROR(errno, "connect"));
+    return;
   }
 
-  grpc_pollset_set_add_fd(exec_ctx, interested_parties, fdobj);
+  grpc_pollset_set_add_fd(interested_parties, fdobj);
 
   ac = (async_connect*)gpr_malloc(sizeof(async_connect));
   ac->closure = closure;
   ac->ep = ep;
   ac->fd = fdobj;
   ac->interested_parties = interested_parties;
-  ac->addr_str = addr_str;
-  addr_str = nullptr;
+  ac->addr_str = grpc_sockaddr_to_uri(addr);
   gpr_mu_init(&ac->mu);
   ac->refs = 2;
   GRPC_CLOSURE_INIT(&ac->write_closure, on_writable, ac,
@@ -324,30 +321,44 @@ static void tcp_client_connect_impl(grpc_exec_ctx* exec_ctx,
 
   gpr_mu_lock(&ac->mu);
   GRPC_CLOSURE_INIT(&ac->on_alarm, tc_on_alarm, ac, grpc_schedule_on_exec_ctx);
-  grpc_timer_init(exec_ctx, &ac->alarm, deadline, &ac->on_alarm);
-  grpc_fd_notify_on_write(exec_ctx, ac->fd, &ac->write_closure);
+  grpc_timer_init(&ac->alarm, deadline, &ac->on_alarm);
+  grpc_fd_notify_on_write(ac->fd, &ac->write_closure);
   gpr_mu_unlock(&ac->mu);
+}
 
-done:
-  gpr_free(name);
-  gpr_free(addr_str);
+static void tcp_client_connect_impl(grpc_closure* closure, grpc_endpoint** ep,
+                                    grpc_pollset_set* interested_parties,
+                                    const grpc_channel_args* channel_args,
+                                    const grpc_resolved_address* addr,
+                                    grpc_millis deadline) {
+  grpc_resolved_address mapped_addr;
+  grpc_fd* fdobj = nullptr;
+  grpc_error* error;
+  *ep = nullptr;
+  if ((error = grpc_tcp_client_prepare_fd(channel_args, addr, &mapped_addr,
+                                          &fdobj)) != GRPC_ERROR_NONE) {
+    GRPC_CLOSURE_SCHED(closure, error);
+    return;
+  }
+  grpc_tcp_client_create_from_prepared_fd(interested_parties, closure, fdobj,
+                                          channel_args, &mapped_addr, deadline,
+                                          ep);
 }
 
 // overridden by api_fuzzer.c
 void (*grpc_tcp_client_connect_impl)(
-    grpc_exec_ctx* exec_ctx, grpc_closure* closure, grpc_endpoint** ep,
+    grpc_closure* closure, grpc_endpoint** ep,
     grpc_pollset_set* interested_parties, const grpc_channel_args* channel_args,
     const grpc_resolved_address* addr,
     grpc_millis deadline) = tcp_client_connect_impl;
 
-void grpc_tcp_client_connect(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                             grpc_endpoint** ep,
+void grpc_tcp_client_connect(grpc_closure* closure, grpc_endpoint** ep,
                              grpc_pollset_set* interested_parties,
                              const grpc_channel_args* channel_args,
                              const grpc_resolved_address* addr,
                              grpc_millis deadline) {
-  grpc_tcp_client_connect_impl(exec_ctx, closure, ep, interested_parties,
-                               channel_args, addr, deadline);
+  grpc_tcp_client_connect_impl(closure, ep, interested_parties, channel_args,
+                               addr, deadline);
 }
 
 #endif
diff --git a/src/core/lib/iomgr/tcp_client_posix.h b/src/core/lib/iomgr/tcp_client_posix.h
index 2b1fe79e90..57e50a67d2 100644
--- a/src/core/lib/iomgr/tcp_client_posix.h
+++ b/src/core/lib/iomgr/tcp_client_posix.h
@@ -23,8 +23,44 @@
 #include "src/core/lib/iomgr/ev_posix.h"
 #include "src/core/lib/iomgr/tcp_client.h"
 
+/* Create an endpoint from a connected grpc_fd.
+
+   fd: a connected FD. Ownership is taken.
+   channel_args: may contain custom settings for the endpoint
+   addr_str: destination address in printable format
+   Returns: a new endpoint
+*/
 grpc_endpoint* grpc_tcp_client_create_from_fd(
-    grpc_exec_ctx* exec_ctx, grpc_fd* fd, const grpc_channel_args* channel_args,
-    const char* addr_str);
+    grpc_fd* fd, const grpc_channel_args* channel_args, const char* addr_str);
+
+/* Return a configured, unbound, unconnected TCP client grpc_fd.
+
+   channel_args: may contain custom settings for the fd
+   addr: the destination address
+   mapped_addr: out parameter. addr mapped to an address appropriate to the
+     type of socket FD created. For example, if addr is IPv4 and dual stack
+     sockets are available, mapped_addr will be an IPv4-mapped IPv6 address
+   fdobj: out parameter. The new FD
+   Returns: error, if any. Out parameters are not set on error
+*/
+grpc_error* grpc_tcp_client_prepare_fd(const grpc_channel_args* channel_args,
+                                       const grpc_resolved_address* addr,
+                                       grpc_resolved_address* mapped_addr,
+                                       grpc_fd** fdobj);
+
+/* Connect a configured TCP client grpc_fd.
+
+   interested_parties: a set of pollsets that would be interested in this
+     connection being established (in order to continue their work
+   closure: called when complete. On success, *ep will be set.
+   fdobj: an FD returned from grpc_tcp_client_prepare_fd(). Ownership is taken
+   channel_args: may contain custom settings for the endpoint
+   deadline: connection deadline
+   ep: out parameter. Set before closure is called if successful
+*/
+void grpc_tcp_client_create_from_prepared_fd(
+    grpc_pollset_set* interested_parties, grpc_closure* closure, grpc_fd* fdobj,
+    const grpc_channel_args* channel_args, const grpc_resolved_address* addr,
+    grpc_millis deadline, grpc_endpoint** ep);
 
 #endif /* GRPC_CORE_LIB_IOMGR_TCP_CLIENT_POSIX_H */
diff --git a/src/core/lib/iomgr/tcp_client_uv.cc b/src/core/lib/iomgr/tcp_client_uv.cc
index 5cca0c9936..4e9c7cc11d 100644
--- a/src/core/lib/iomgr/tcp_client_uv.cc
+++ b/src/core/lib/iomgr/tcp_client_uv.cc
@@ -46,17 +46,15 @@ typedef struct grpc_uv_tcp_connect {
   grpc_resource_quota* resource_quota;
 } grpc_uv_tcp_connect;
 
-static void uv_tcp_connect_cleanup(grpc_exec_ctx* exec_ctx,
-                                   grpc_uv_tcp_connect* connect) {
-  grpc_resource_quota_unref_internal(exec_ctx, connect->resource_quota);
+static void uv_tcp_connect_cleanup(grpc_uv_tcp_connect* connect) {
+  grpc_resource_quota_unref_internal(connect->resource_quota);
   gpr_free(connect->addr_name);
   gpr_free(connect);
 }
 
 static void tcp_close_callback(uv_handle_t* handle) { gpr_free(handle); }
 
-static void uv_tc_on_alarm(grpc_exec_ctx* exec_ctx, void* acp,
-                           grpc_error* error) {
+static void uv_tc_on_alarm(void* acp, grpc_error* error) {
   int done;
   grpc_uv_tcp_connect* connect = (grpc_uv_tcp_connect*)acp;
   if (grpc_tcp_trace.enabled()) {
@@ -72,17 +70,17 @@ static void uv_tc_on_alarm(grpc_exec_ctx* exec_ctx, void* acp,
   }
   done = (--connect->refs == 0);
   if (done) {
-    uv_tcp_connect_cleanup(exec_ctx, connect);
+    uv_tcp_connect_cleanup(connect);
   }
 }
 
 static void uv_tc_on_connect(uv_connect_t* req, int status) {
   grpc_uv_tcp_connect* connect = (grpc_uv_tcp_connect*)req->data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_error* error = GRPC_ERROR_NONE;
   int done;
   grpc_closure* closure = connect->closure;
-  grpc_timer_cancel(&exec_ctx, &connect->alarm);
+  grpc_timer_cancel(&connect->alarm);
   if (status == 0) {
     *connect->endpoint = grpc_tcp_create(
         connect->tcp_handle, connect->resource_quota, connect->addr_name);
@@ -107,15 +105,13 @@ static void uv_tc_on_connect(uv_connect_t* req, int status) {
   }
   done = (--connect->refs == 0);
   if (done) {
-    grpc_exec_ctx_flush(&exec_ctx);
-    uv_tcp_connect_cleanup(&exec_ctx, connect);
+    grpc_core::ExecCtx::Get()->Flush();
+    uv_tcp_connect_cleanup(connect);
   }
-  GRPC_CLOSURE_SCHED(&exec_ctx, closure, error);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CLOSURE_SCHED(closure, error);
 }
 
-static void tcp_client_connect_impl(grpc_exec_ctx* exec_ctx,
-                                    grpc_closure* closure, grpc_endpoint** ep,
+static void tcp_client_connect_impl(grpc_closure* closure, grpc_endpoint** ep,
                                     grpc_pollset_set* interested_parties,
                                     const grpc_channel_args* channel_args,
                                     const grpc_resolved_address* resolved_addr,
@@ -130,7 +126,7 @@ static void tcp_client_connect_impl(grpc_exec_ctx* exec_ctx,
   if (channel_args != NULL) {
     for (size_t i = 0; i < channel_args->num_args; i++) {
       if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
-        grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+        grpc_resource_quota_unref_internal(resource_quota);
         resource_quota = grpc_resource_quota_ref_internal(
             (grpc_resource_quota*)channel_args->args[i].value.pointer.p);
       }
@@ -157,24 +153,23 @@ static void tcp_client_connect_impl(grpc_exec_ctx* exec_ctx,
                  (const struct sockaddr*)resolved_addr->addr, uv_tc_on_connect);
   GRPC_CLOSURE_INIT(&connect->on_alarm, uv_tc_on_alarm, connect,
                     grpc_schedule_on_exec_ctx);
-  grpc_timer_init(exec_ctx, &connect->alarm, deadline, &connect->on_alarm);
+  grpc_timer_init(&connect->alarm, deadline, &connect->on_alarm);
 }
 
 // overridden by api_fuzzer.c
 void (*grpc_tcp_client_connect_impl)(
-    grpc_exec_ctx* exec_ctx, grpc_closure* closure, grpc_endpoint** ep,
+    grpc_closure* closure, grpc_endpoint** ep,
     grpc_pollset_set* interested_parties, const grpc_channel_args* channel_args,
     const grpc_resolved_address* addr,
     grpc_millis deadline) = tcp_client_connect_impl;
 
-void grpc_tcp_client_connect(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                             grpc_endpoint** ep,
+void grpc_tcp_client_connect(grpc_closure* closure, grpc_endpoint** ep,
                              grpc_pollset_set* interested_parties,
                              const grpc_channel_args* channel_args,
                              const grpc_resolved_address* addr,
                              grpc_millis deadline) {
-  grpc_tcp_client_connect_impl(exec_ctx, closure, ep, interested_parties,
-                               channel_args, addr, deadline);
+  grpc_tcp_client_connect_impl(closure, ep, interested_parties, channel_args,
+                               addr, deadline);
 }
 
 #endif /* GRPC_UV */
diff --git a/src/core/lib/iomgr/tcp_client_windows.cc b/src/core/lib/iomgr/tcp_client_windows.cc
index 5e30725e90..97aa9237dc 100644
--- a/src/core/lib/iomgr/tcp_client_windows.cc
+++ b/src/core/lib/iomgr/tcp_client_windows.cc
@@ -52,13 +52,12 @@ typedef struct {
   grpc_channel_args* channel_args;
 } async_connect;
 
-static void async_connect_unlock_and_cleanup(grpc_exec_ctx* exec_ctx,
-                                             async_connect* ac,
+static void async_connect_unlock_and_cleanup(async_connect* ac,
                                              grpc_winsocket* socket) {
   int done = (--ac->refs == 0);
   gpr_mu_unlock(&ac->mu);
   if (done) {
-    grpc_channel_args_destroy(exec_ctx, ac->channel_args);
+    grpc_channel_args_destroy(ac->channel_args);
     gpr_mu_destroy(&ac->mu);
     gpr_free(ac->addr_name);
     gpr_free(ac);
@@ -66,7 +65,7 @@ static void async_connect_unlock_and_cleanup(grpc_exec_ctx* exec_ctx,
   if (socket != NULL) grpc_winsocket_destroy(socket);
 }
 
-static void on_alarm(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
+static void on_alarm(void* acp, grpc_error* error) {
   async_connect* ac = (async_connect*)acp;
   gpr_mu_lock(&ac->mu);
   grpc_winsocket* socket = ac->socket;
@@ -74,10 +73,10 @@ static void on_alarm(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
   if (socket != NULL) {
     grpc_winsocket_shutdown(socket);
   }
-  async_connect_unlock_and_cleanup(exec_ctx, ac, socket);
+  async_connect_unlock_and_cleanup(ac, socket);
 }
 
-static void on_connect(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
+static void on_connect(void* acp, grpc_error* error) {
   async_connect* ac = (async_connect*)acp;
   grpc_endpoint** ep = ac->endpoint;
   GPR_ASSERT(*ep == NULL);
@@ -90,7 +89,7 @@ static void on_connect(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
   ac->socket = NULL;
   gpr_mu_unlock(&ac->mu);
 
-  grpc_timer_cancel(exec_ctx, &ac->alarm);
+  grpc_timer_cancel(&ac->alarm);
 
   gpr_mu_lock(&ac->mu);
 
@@ -104,9 +103,9 @@ static void on_connect(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
       GPR_ASSERT(transfered_bytes == 0);
       if (!wsa_success) {
         error = GRPC_WSA_ERROR(WSAGetLastError(), "ConnectEx");
+        closesocket(socket->socket);
       } else {
-        *ep =
-            grpc_tcp_create(exec_ctx, socket, ac->channel_args, ac->addr_name);
+        *ep = grpc_tcp_create(socket, ac->channel_args, ac->addr_name);
         socket = NULL;
       }
     } else {
@@ -114,18 +113,20 @@ static void on_connect(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
     }
   }
 
-  async_connect_unlock_and_cleanup(exec_ctx, ac, socket);
+  async_connect_unlock_and_cleanup(ac, socket);
   /* If the connection was aborted, the callback was already called when
      the deadline was met. */
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, error);
+  GRPC_CLOSURE_SCHED(on_done, error);
 }
 
 /* Tries to issue one async connection, then schedules both an IOCP
    notification request for the connection, and one timeout alert. */
-static void tcp_client_connect_impl(
-    grpc_exec_ctx* exec_ctx, grpc_closure* on_done, grpc_endpoint** endpoint,
-    grpc_pollset_set* interested_parties, const grpc_channel_args* channel_args,
-    const grpc_resolved_address* addr, grpc_millis deadline) {
+static void tcp_client_connect_impl(grpc_closure* on_done,
+                                    grpc_endpoint** endpoint,
+                                    grpc_pollset_set* interested_parties,
+                                    const grpc_channel_args* channel_args,
+                                    const grpc_resolved_address* addr,
+                                    grpc_millis deadline) {
   SOCKET sock = INVALID_SOCKET;
   BOOL success;
   int status;
@@ -205,8 +206,8 @@ static void tcp_client_connect_impl(
   GRPC_CLOSURE_INIT(&ac->on_connect, on_connect, ac, grpc_schedule_on_exec_ctx);
 
   GRPC_CLOSURE_INIT(&ac->on_alarm, on_alarm, ac, grpc_schedule_on_exec_ctx);
-  grpc_timer_init(exec_ctx, &ac->alarm, deadline, &ac->on_alarm);
-  grpc_socket_notify_on_write(exec_ctx, socket, &ac->on_connect);
+  grpc_timer_init(&ac->alarm, deadline, &ac->on_alarm);
+  grpc_socket_notify_on_write(socket, &ac->on_connect);
   return;
 
 failure:
@@ -222,24 +223,23 @@ failure:
   } else if (sock != INVALID_SOCKET) {
     closesocket(sock);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, final_error);
+  GRPC_CLOSURE_SCHED(on_done, final_error);
 }
 
 // overridden by api_fuzzer.c
 void (*grpc_tcp_client_connect_impl)(
-    grpc_exec_ctx* exec_ctx, grpc_closure* closure, grpc_endpoint** ep,
+    grpc_closure* closure, grpc_endpoint** ep,
     grpc_pollset_set* interested_parties, const grpc_channel_args* channel_args,
     const grpc_resolved_address* addr,
     grpc_millis deadline) = tcp_client_connect_impl;
 
-void grpc_tcp_client_connect(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                             grpc_endpoint** ep,
+void grpc_tcp_client_connect(grpc_closure* closure, grpc_endpoint** ep,
                              grpc_pollset_set* interested_parties,
                              const grpc_channel_args* channel_args,
                              const grpc_resolved_address* addr,
                              grpc_millis deadline) {
-  grpc_tcp_client_connect_impl(exec_ctx, closure, ep, interested_parties,
-                               channel_args, addr, deadline);
+  grpc_tcp_client_connect_impl(closure, ep, interested_parties, channel_args,
+                               addr, deadline);
 }
 
 #endif /* GRPC_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/tcp_posix.cc b/src/core/lib/iomgr/tcp_posix.cc
index d09cfca9af..155329d2e8 100644
--- a/src/core/lib/iomgr/tcp_posix.cc
+++ b/src/core/lib/iomgr/tcp_posix.cc
@@ -108,36 +108,31 @@ typedef struct backup_poller {
 static gpr_atm g_uncovered_notifications_pending;
 static gpr_atm g_backup_poller; /* backup_poller* */
 
-static void tcp_handle_read(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
-                            grpc_error* error);
-static void tcp_handle_write(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
-                             grpc_error* error);
-static void tcp_drop_uncovered_then_handle_write(grpc_exec_ctx* exec_ctx,
-                                                 void* arg /* grpc_tcp */,
+static void tcp_handle_read(void* arg /* grpc_tcp */, grpc_error* error);
+static void tcp_handle_write(void* arg /* grpc_tcp */, grpc_error* error);
+static void tcp_drop_uncovered_then_handle_write(void* arg /* grpc_tcp */,
                                                  grpc_error* error);
 
-static void done_poller(grpc_exec_ctx* exec_ctx, void* bp,
-                        grpc_error* error_ignored) {
+static void done_poller(void* bp, grpc_error* error_ignored) {
   backup_poller* p = (backup_poller*)bp;
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p destroy", p);
   }
-  grpc_pollset_destroy(exec_ctx, BACKUP_POLLER_POLLSET(p));
+  grpc_pollset_destroy(BACKUP_POLLER_POLLSET(p));
   gpr_free(p);
 }
 
-static void run_poller(grpc_exec_ctx* exec_ctx, void* bp,
-                       grpc_error* error_ignored) {
+static void run_poller(void* bp, grpc_error* error_ignored) {
   backup_poller* p = (backup_poller*)bp;
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p run", p);
   }
   gpr_mu_lock(p->pollset_mu);
-  grpc_millis deadline = grpc_exec_ctx_now(exec_ctx) + 13 * GPR_MS_PER_SEC;
-  GRPC_STATS_INC_TCP_BACKUP_POLLER_POLLS(exec_ctx);
+  grpc_millis deadline = grpc_core::ExecCtx::Get()->Now() + 13 * GPR_MS_PER_SEC;
+  GRPC_STATS_INC_TCP_BACKUP_POLLER_POLLS();
   GRPC_LOG_IF_ERROR(
       "backup_poller:pollset_work",
-      grpc_pollset_work(exec_ctx, BACKUP_POLLER_POLLSET(p), nullptr, deadline));
+      grpc_pollset_work(BACKUP_POLLER_POLLSET(p), nullptr, deadline));
   gpr_mu_unlock(p->pollset_mu);
   /* last "uncovered" notification is the ref that keeps us polling, if we get
    * there try a cas to release it */
@@ -152,18 +147,18 @@ static void run_poller(grpc_exec_ctx* exec_ctx, void* bp,
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p shutdown", p);
     }
-    grpc_pollset_shutdown(exec_ctx, BACKUP_POLLER_POLLSET(p),
+    grpc_pollset_shutdown(BACKUP_POLLER_POLLSET(p),
                           GRPC_CLOSURE_INIT(&p->run_poller, done_poller, p,
                                             grpc_schedule_on_exec_ctx));
   } else {
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p reschedule", p);
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, &p->run_poller, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&p->run_poller, GRPC_ERROR_NONE);
   }
 }
 
-static void drop_uncovered(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void drop_uncovered(grpc_tcp* tcp) {
   backup_poller* p = (backup_poller*)gpr_atm_acq_load(&g_backup_poller);
   gpr_atm old_count =
       gpr_atm_no_barrier_fetch_add(&g_uncovered_notifications_pending, -1);
@@ -174,7 +169,7 @@ static void drop_uncovered(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
   GPR_ASSERT(old_count != 1);
 }
 
-static void cover_self(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void cover_self(grpc_tcp* tcp) {
   backup_poller* p;
   gpr_atm old_count =
       gpr_atm_no_barrier_fetch_add(&g_uncovered_notifications_pending, 2);
@@ -183,7 +178,7 @@ static void cover_self(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
             2 + (int)old_count);
   }
   if (old_count == 0) {
-    GRPC_STATS_INC_TCP_BACKUP_POLLERS_CREATED(exec_ctx);
+    GRPC_STATS_INC_TCP_BACKUP_POLLERS_CREATED();
     p = (backup_poller*)gpr_zalloc(sizeof(*p) + grpc_pollset_size());
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p create", p);
@@ -191,7 +186,6 @@ static void cover_self(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
     grpc_pollset_init(BACKUP_POLLER_POLLSET(p), &p->pollset_mu);
     gpr_atm_rel_store(&g_backup_poller, (gpr_atm)p);
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_INIT(&p->run_poller, run_poller, p,
                           grpc_executor_scheduler(GRPC_EXECUTOR_LONG)),
         GRPC_ERROR_NONE);
@@ -204,39 +198,38 @@ static void cover_self(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p add %p", p, tcp);
   }
-  grpc_pollset_add_fd(exec_ctx, BACKUP_POLLER_POLLSET(p), tcp->em_fd);
+  grpc_pollset_add_fd(BACKUP_POLLER_POLLSET(p), tcp->em_fd);
   if (old_count != 0) {
-    drop_uncovered(exec_ctx, tcp);
+    drop_uncovered(tcp);
   }
 }
 
-static void notify_on_read(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void notify_on_read(grpc_tcp* tcp) {
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "TCP:%p notify_on_read", tcp);
   }
   GRPC_CLOSURE_INIT(&tcp->read_done_closure, tcp_handle_read, tcp,
                     grpc_schedule_on_exec_ctx);
-  grpc_fd_notify_on_read(exec_ctx, tcp->em_fd, &tcp->read_done_closure);
+  grpc_fd_notify_on_read(tcp->em_fd, &tcp->read_done_closure);
 }
 
-static void notify_on_write(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void notify_on_write(grpc_tcp* tcp) {
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "TCP:%p notify_on_write", tcp);
   }
-  cover_self(exec_ctx, tcp);
+  cover_self(tcp);
   GRPC_CLOSURE_INIT(&tcp->write_done_closure,
                     tcp_drop_uncovered_then_handle_write, tcp,
                     grpc_schedule_on_exec_ctx);
-  grpc_fd_notify_on_write(exec_ctx, tcp->em_fd, &tcp->write_done_closure);
+  grpc_fd_notify_on_write(tcp->em_fd, &tcp->write_done_closure);
 }
 
-static void tcp_drop_uncovered_then_handle_write(grpc_exec_ctx* exec_ctx,
-                                                 void* arg, grpc_error* error) {
+static void tcp_drop_uncovered_then_handle_write(void* arg, grpc_error* error) {
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "TCP:%p got_write: %s", arg, grpc_error_string(error));
   }
-  drop_uncovered(exec_ctx, (grpc_tcp*)arg);
-  tcp_handle_write(exec_ctx, arg, error);
+  drop_uncovered((grpc_tcp*)arg);
+  tcp_handle_write(arg, error);
 }
 
 static void add_to_estimate(grpc_tcp* tcp, size_t bytes) {
@@ -282,33 +275,29 @@ static grpc_error* tcp_annotate_error(grpc_error* src_error, grpc_tcp* tcp) {
       grpc_slice_from_copied_string(tcp->peer_string));
 }
 
-static void tcp_handle_read(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
-                            grpc_error* error);
-static void tcp_handle_write(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
-                             grpc_error* error);
+static void tcp_handle_read(void* arg /* grpc_tcp */, grpc_error* error);
+static void tcp_handle_write(void* arg /* grpc_tcp */, grpc_error* error);
 
-static void tcp_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                         grpc_error* why) {
+static void tcp_shutdown(grpc_endpoint* ep, grpc_error* why) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
-  grpc_fd_shutdown(exec_ctx, tcp->em_fd, why);
-  grpc_resource_user_shutdown(exec_ctx, tcp->resource_user);
+  grpc_fd_shutdown(tcp->em_fd, why);
+  grpc_resource_user_shutdown(tcp->resource_user);
 }
 
-static void tcp_free(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
-  grpc_fd_orphan(exec_ctx, tcp->em_fd, tcp->release_fd_cb, tcp->release_fd,
+static void tcp_free(grpc_tcp* tcp) {
+  grpc_fd_orphan(tcp->em_fd, tcp->release_fd_cb, tcp->release_fd,
                  false /* already_closed */, "tcp_unref_orphan");
-  grpc_slice_buffer_destroy_internal(exec_ctx, &tcp->last_read_buffer);
-  grpc_resource_user_unref(exec_ctx, tcp->resource_user);
+  grpc_slice_buffer_destroy_internal(&tcp->last_read_buffer);
+  grpc_resource_user_unref(tcp->resource_user);
   gpr_free(tcp->peer_string);
   gpr_free(tcp);
 }
 
 #ifndef NDEBUG
-#define TCP_UNREF(cl, tcp, reason) \
-  tcp_unref((cl), (tcp), (reason), __FILE__, __LINE__)
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp), (reason), __FILE__, __LINE__)
 #define TCP_REF(tcp, reason) tcp_ref((tcp), (reason), __FILE__, __LINE__)
-static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
-                      const char* reason, const char* file, int line) {
+static void tcp_unref(grpc_tcp* tcp, const char* reason, const char* file,
+                      int line) {
   if (grpc_tcp_trace.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&tcp->refcount.count);
     gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
@@ -316,7 +305,7 @@ static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
             val - 1);
   }
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(exec_ctx, tcp);
+    tcp_free(tcp);
   }
 }
 
@@ -331,26 +320,25 @@ static void tcp_ref(grpc_tcp* tcp, const char* reason, const char* file,
   gpr_ref(&tcp->refcount);
 }
 #else
-#define TCP_UNREF(cl, tcp, reason) tcp_unref((cl), (tcp))
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp))
 #define TCP_REF(tcp, reason) tcp_ref((tcp))
-static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void tcp_unref(grpc_tcp* tcp) {
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(exec_ctx, tcp);
+    tcp_free(tcp);
   }
 }
 
 static void tcp_ref(grpc_tcp* tcp) { gpr_ref(&tcp->refcount); }
 #endif
 
-static void tcp_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+static void tcp_destroy(grpc_endpoint* ep) {
   grpc_network_status_unregister_endpoint(ep);
   grpc_tcp* tcp = (grpc_tcp*)ep;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &tcp->last_read_buffer);
-  TCP_UNREF(exec_ctx, tcp, "destroy");
+  grpc_slice_buffer_reset_and_unref_internal(&tcp->last_read_buffer);
+  TCP_UNREF(tcp, "destroy");
 }
 
-static void call_read_cb(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
-                         grpc_error* error) {
+static void call_read_cb(grpc_tcp* tcp, grpc_error* error) {
   grpc_closure* cb = tcp->read_cb;
 
   if (grpc_tcp_trace.enabled()) {
@@ -369,11 +357,11 @@ static void call_read_cb(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
 
   tcp->read_cb = nullptr;
   tcp->incoming_buffer = nullptr;
-  GRPC_CLOSURE_RUN(exec_ctx, cb, error);
+  GRPC_CLOSURE_RUN(cb, error);
 }
 
 #define MAX_READ_IOVEC 4
-static void tcp_do_read(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void tcp_do_read(grpc_tcp* tcp) {
   struct msghdr msg;
   struct iovec iov[MAX_READ_IOVEC];
   ssize_t read_bytes;
@@ -396,12 +384,12 @@ static void tcp_do_read(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
   msg.msg_controllen = 0;
   msg.msg_flags = 0;
 
-  GRPC_STATS_INC_TCP_READ_OFFER(exec_ctx, tcp->incoming_buffer->length);
-  GRPC_STATS_INC_TCP_READ_OFFER_IOV_SIZE(exec_ctx, tcp->incoming_buffer->count);
+  GRPC_STATS_INC_TCP_READ_OFFER(tcp->incoming_buffer->length);
+  GRPC_STATS_INC_TCP_READ_OFFER_IOV_SIZE(tcp->incoming_buffer->count);
 
   GPR_TIMER_BEGIN("recvmsg", 0);
   do {
-    GRPC_STATS_INC_SYSCALL_READ(exec_ctx);
+    GRPC_STATS_INC_SYSCALL_READ();
     read_bytes = recvmsg(tcp->fd, &msg, 0);
   } while (read_bytes < 0 && errno == EINTR);
   GPR_TIMER_END("recvmsg", read_bytes >= 0);
@@ -412,24 +400,22 @@ static void tcp_do_read(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
     if (errno == EAGAIN) {
       finish_estimate(tcp);
       /* We've consumed the edge, request a new one */
-      notify_on_read(exec_ctx, tcp);
+      notify_on_read(tcp);
     } else {
-      grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                                 tcp->incoming_buffer);
-      call_read_cb(exec_ctx, tcp,
+      grpc_slice_buffer_reset_and_unref_internal(tcp->incoming_buffer);
+      call_read_cb(tcp,
                    tcp_annotate_error(GRPC_OS_ERROR(errno, "recvmsg"), tcp));
-      TCP_UNREF(exec_ctx, tcp, "read");
+      TCP_UNREF(tcp, "read");
     }
   } else if (read_bytes == 0) {
     /* 0 read size ==> end of stream */
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, tcp->incoming_buffer);
+    grpc_slice_buffer_reset_and_unref_internal(tcp->incoming_buffer);
     call_read_cb(
-        exec_ctx, tcp,
-        tcp_annotate_error(
-            GRPC_ERROR_CREATE_FROM_STATIC_STRING("Socket closed"), tcp));
-    TCP_UNREF(exec_ctx, tcp, "read");
+        tcp, tcp_annotate_error(
+                 GRPC_ERROR_CREATE_FROM_STATIC_STRING("Socket closed"), tcp));
+    TCP_UNREF(tcp, "read");
   } else {
-    GRPC_STATS_INC_TCP_READ_SIZE(exec_ctx, read_bytes);
+    GRPC_STATS_INC_TCP_READ_SIZE(read_bytes);
     add_to_estimate(tcp, (size_t)read_bytes);
     GPR_ASSERT((size_t)read_bytes <= tcp->incoming_buffer->length);
     if ((size_t)read_bytes < tcp->incoming_buffer->length) {
@@ -439,50 +425,47 @@ static void tcp_do_read(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
           &tcp->last_read_buffer);
     }
     GPR_ASSERT((size_t)read_bytes == tcp->incoming_buffer->length);
-    call_read_cb(exec_ctx, tcp, GRPC_ERROR_NONE);
-    TCP_UNREF(exec_ctx, tcp, "read");
+    call_read_cb(tcp, GRPC_ERROR_NONE);
+    TCP_UNREF(tcp, "read");
   }
 
   GPR_TIMER_END("tcp_continue_read", 0);
 }
 
-static void tcp_read_allocation_done(grpc_exec_ctx* exec_ctx, void* tcpp,
-                                     grpc_error* error) {
+static void tcp_read_allocation_done(void* tcpp, grpc_error* error) {
   grpc_tcp* tcp = (grpc_tcp*)tcpp;
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "TCP:%p read_allocation_done: %s", tcp,
             grpc_error_string(error));
   }
   if (error != GRPC_ERROR_NONE) {
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, tcp->incoming_buffer);
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                               &tcp->last_read_buffer);
-    call_read_cb(exec_ctx, tcp, GRPC_ERROR_REF(error));
-    TCP_UNREF(exec_ctx, tcp, "read");
+    grpc_slice_buffer_reset_and_unref_internal(tcp->incoming_buffer);
+    grpc_slice_buffer_reset_and_unref_internal(&tcp->last_read_buffer);
+    call_read_cb(tcp, GRPC_ERROR_REF(error));
+    TCP_UNREF(tcp, "read");
   } else {
-    tcp_do_read(exec_ctx, tcp);
+    tcp_do_read(tcp);
   }
 }
 
-static void tcp_continue_read(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void tcp_continue_read(grpc_tcp* tcp) {
   size_t target_read_size = get_target_read_size(tcp);
   if (tcp->incoming_buffer->length < target_read_size &&
       tcp->incoming_buffer->count < MAX_READ_IOVEC) {
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "TCP:%p alloc_slices", tcp);
     }
-    grpc_resource_user_alloc_slices(exec_ctx, &tcp->slice_allocator,
-                                    target_read_size, 1, tcp->incoming_buffer);
+    grpc_resource_user_alloc_slices(&tcp->slice_allocator, target_read_size, 1,
+                                    tcp->incoming_buffer);
   } else {
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "TCP:%p do_read", tcp);
     }
-    tcp_do_read(exec_ctx, tcp);
+    tcp_do_read(tcp);
   }
 }
 
-static void tcp_handle_read(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
-                            grpc_error* error) {
+static void tcp_handle_read(void* arg /* grpc_tcp */, grpc_error* error) {
   grpc_tcp* tcp = (grpc_tcp*)arg;
   GPR_ASSERT(!tcp->finished_edge);
   if (grpc_tcp_trace.enabled()) {
@@ -490,37 +473,35 @@ static void tcp_handle_read(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
   }
 
   if (error != GRPC_ERROR_NONE) {
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, tcp->incoming_buffer);
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                               &tcp->last_read_buffer);
-    call_read_cb(exec_ctx, tcp, GRPC_ERROR_REF(error));
-    TCP_UNREF(exec_ctx, tcp, "read");
+    grpc_slice_buffer_reset_and_unref_internal(tcp->incoming_buffer);
+    grpc_slice_buffer_reset_and_unref_internal(&tcp->last_read_buffer);
+    call_read_cb(tcp, GRPC_ERROR_REF(error));
+    TCP_UNREF(tcp, "read");
   } else {
-    tcp_continue_read(exec_ctx, tcp);
+    tcp_continue_read(tcp);
   }
 }
 
-static void tcp_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                     grpc_slice_buffer* incoming_buffer, grpc_closure* cb) {
+static void tcp_read(grpc_endpoint* ep, grpc_slice_buffer* incoming_buffer,
+                     grpc_closure* cb) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   GPR_ASSERT(tcp->read_cb == nullptr);
   tcp->read_cb = cb;
   tcp->incoming_buffer = incoming_buffer;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, incoming_buffer);
+  grpc_slice_buffer_reset_and_unref_internal(incoming_buffer);
   grpc_slice_buffer_swap(incoming_buffer, &tcp->last_read_buffer);
   TCP_REF(tcp, "read");
   if (tcp->finished_edge) {
     tcp->finished_edge = false;
-    notify_on_read(exec_ctx, tcp);
+    notify_on_read(tcp);
   } else {
-    GRPC_CLOSURE_SCHED(exec_ctx, &tcp->read_done_closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&tcp->read_done_closure, GRPC_ERROR_NONE);
   }
 }
 
 /* returns true if done, false if pending; if returning true, *error is set */
 #define MAX_WRITE_IOVEC 1000
-static bool tcp_flush(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
-                      grpc_error** error) {
+static bool tcp_flush(grpc_tcp* tcp, grpc_error** error) {
   struct msghdr msg;
   struct iovec iov[MAX_WRITE_IOVEC];
   msg_iovlen_type iov_size;
@@ -562,13 +543,13 @@ static bool tcp_flush(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
     msg.msg_controllen = 0;
     msg.msg_flags = 0;
 
-    GRPC_STATS_INC_TCP_WRITE_SIZE(exec_ctx, sending_length);
-    GRPC_STATS_INC_TCP_WRITE_IOV_SIZE(exec_ctx, iov_size);
+    GRPC_STATS_INC_TCP_WRITE_SIZE(sending_length);
+    GRPC_STATS_INC_TCP_WRITE_IOV_SIZE(iov_size);
 
     GPR_TIMER_BEGIN("sendmsg", 1);
     do {
       /* TODO(klempner): Cork if this is a partial write */
-      GRPC_STATS_INC_SYSCALL_WRITE(exec_ctx);
+      GRPC_STATS_INC_SYSCALL_WRITE();
       sent_length = sendmsg(tcp->fd, &msg, SENDMSG_FLAGS);
     } while (sent_length < 0 && errno == EINTR);
     GPR_TIMER_END("sendmsg", 0);
@@ -580,20 +561,18 @@ static bool tcp_flush(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
         // point
         for (size_t idx = 0; idx < unwind_slice_idx; ++idx) {
           grpc_slice_unref_internal(
-              exec_ctx, grpc_slice_buffer_take_first(tcp->outgoing_buffer));
+              grpc_slice_buffer_take_first(tcp->outgoing_buffer));
         }
         return false;
       } else if (errno == EPIPE) {
         *error = grpc_error_set_int(GRPC_OS_ERROR(errno, "sendmsg"),
                                     GRPC_ERROR_INT_GRPC_STATUS,
                                     GRPC_STATUS_UNAVAILABLE);
-        grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                                   tcp->outgoing_buffer);
+        grpc_slice_buffer_reset_and_unref_internal(tcp->outgoing_buffer);
         return true;
       } else {
         *error = tcp_annotate_error(GRPC_OS_ERROR(errno, "sendmsg"), tcp);
-        grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                                   tcp->outgoing_buffer);
+        grpc_slice_buffer_reset_and_unref_internal(tcp->outgoing_buffer);
         return true;
       }
     }
@@ -616,31 +595,29 @@ static bool tcp_flush(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
 
     if (outgoing_slice_idx == tcp->outgoing_buffer->count) {
       *error = GRPC_ERROR_NONE;
-      grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                                 tcp->outgoing_buffer);
+      grpc_slice_buffer_reset_and_unref_internal(tcp->outgoing_buffer);
       return true;
     }
   }
 }
 
-static void tcp_handle_write(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
-                             grpc_error* error) {
+static void tcp_handle_write(void* arg /* grpc_tcp */, grpc_error* error) {
   grpc_tcp* tcp = (grpc_tcp*)arg;
   grpc_closure* cb;
 
   if (error != GRPC_ERROR_NONE) {
     cb = tcp->write_cb;
     tcp->write_cb = nullptr;
-    cb->cb(exec_ctx, cb->cb_arg, error);
-    TCP_UNREF(exec_ctx, tcp, "write");
+    cb->cb(cb->cb_arg, error);
+    TCP_UNREF(tcp, "write");
     return;
   }
 
-  if (!tcp_flush(exec_ctx, tcp, &error)) {
+  if (!tcp_flush(tcp, &error)) {
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "write: delayed");
     }
-    notify_on_write(exec_ctx, tcp);
+    notify_on_write(tcp);
   } else {
     cb = tcp->write_cb;
     tcp->write_cb = nullptr;
@@ -649,13 +626,13 @@ static void tcp_handle_write(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
       gpr_log(GPR_DEBUG, "write: %s", str);
     }
 
-    GRPC_CLOSURE_RUN(exec_ctx, cb, error);
-    TCP_UNREF(exec_ctx, tcp, "write");
+    GRPC_CLOSURE_RUN(cb, error);
+    TCP_UNREF(tcp, "write");
   }
 }
 
-static void tcp_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                      grpc_slice_buffer* buf, grpc_closure* cb) {
+static void tcp_write(grpc_endpoint* ep, grpc_slice_buffer* buf,
+                      grpc_closure* cb) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   grpc_error* error = GRPC_ERROR_NONE;
 
@@ -676,51 +653,48 @@ static void tcp_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
   if (buf->length == 0) {
     GPR_TIMER_END("tcp_write", 0);
     GRPC_CLOSURE_SCHED(
-        exec_ctx, cb,
-        grpc_fd_is_shutdown(tcp->em_fd)
-            ? tcp_annotate_error(GRPC_ERROR_CREATE_FROM_STATIC_STRING("EOF"),
-                                 tcp)
-            : GRPC_ERROR_NONE);
+        cb, grpc_fd_is_shutdown(tcp->em_fd)
+                ? tcp_annotate_error(
+                      GRPC_ERROR_CREATE_FROM_STATIC_STRING("EOF"), tcp)
+                : GRPC_ERROR_NONE);
     return;
   }
   tcp->outgoing_buffer = buf;
   tcp->outgoing_byte_idx = 0;
 
-  if (!tcp_flush(exec_ctx, tcp, &error)) {
+  if (!tcp_flush(tcp, &error)) {
     TCP_REF(tcp, "write");
     tcp->write_cb = cb;
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "write: delayed");
     }
-    notify_on_write(exec_ctx, tcp);
+    notify_on_write(tcp);
   } else {
     if (grpc_tcp_trace.enabled()) {
       const char* str = grpc_error_string(error);
       gpr_log(GPR_DEBUG, "write: %s", str);
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, cb, error);
+    GRPC_CLOSURE_SCHED(cb, error);
   }
 
   GPR_TIMER_END("tcp_write", 0);
 }
 
-static void tcp_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                               grpc_pollset* pollset) {
+static void tcp_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
-  grpc_pollset_add_fd(exec_ctx, pollset, tcp->em_fd);
+  grpc_pollset_add_fd(pollset, tcp->em_fd);
 }
 
-static void tcp_add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+static void tcp_add_to_pollset_set(grpc_endpoint* ep,
                                    grpc_pollset_set* pollset_set) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
-  grpc_pollset_set_add_fd(exec_ctx, pollset_set, tcp->em_fd);
+  grpc_pollset_set_add_fd(pollset_set, tcp->em_fd);
 }
 
-static void tcp_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_endpoint* ep,
+static void tcp_delete_from_pollset_set(grpc_endpoint* ep,
                                         grpc_pollset_set* pollset_set) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
-  grpc_pollset_set_del_fd(exec_ctx, pollset_set, tcp->em_fd);
+  grpc_pollset_set_del_fd(pollset_set, tcp->em_fd);
 }
 
 static char* tcp_get_peer(grpc_endpoint* ep) {
@@ -751,7 +725,7 @@ static const grpc_endpoint_vtable vtable = {tcp_read,
 
 #define MAX_CHUNK_SIZE 32 * 1024 * 1024
 
-grpc_endpoint* grpc_tcp_create(grpc_exec_ctx* exec_ctx, grpc_fd* em_fd,
+grpc_endpoint* grpc_tcp_create(grpc_fd* em_fd,
                                const grpc_channel_args* channel_args,
                                const char* peer_string) {
   int tcp_read_chunk_size = GRPC_TCP_DEFAULT_READ_SLICE_SIZE;
@@ -780,7 +754,7 @@ grpc_endpoint* grpc_tcp_create(grpc_exec_ctx* exec_ctx, grpc_fd* em_fd,
             grpc_channel_arg_get_integer(&channel_args->args[i], options);
       } else if (0 ==
                  strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
-        grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+        grpc_resource_quota_unref_internal(resource_quota);
         resource_quota = grpc_resource_quota_ref_internal(
             (grpc_resource_quota*)channel_args->args[i].value.pointer.p);
       }
@@ -817,7 +791,7 @@ grpc_endpoint* grpc_tcp_create(grpc_exec_ctx* exec_ctx, grpc_fd* em_fd,
       &tcp->slice_allocator, tcp->resource_user, tcp_read_allocation_done, tcp);
   /* Tell network status tracker about new endpoint */
   grpc_network_status_register_endpoint(&tcp->base);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
 
   return &tcp->base;
 }
@@ -828,15 +802,15 @@ int grpc_tcp_fd(grpc_endpoint* ep) {
   return grpc_fd_wrapped_fd(tcp->em_fd);
 }
 
-void grpc_tcp_destroy_and_release_fd(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                     int* fd, grpc_closure* done) {
+void grpc_tcp_destroy_and_release_fd(grpc_endpoint* ep, int* fd,
+                                     grpc_closure* done) {
   grpc_network_status_unregister_endpoint(ep);
   grpc_tcp* tcp = (grpc_tcp*)ep;
   GPR_ASSERT(ep->vtable == &vtable);
   tcp->release_fd = fd;
   tcp->release_fd_cb = done;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &tcp->last_read_buffer);
-  TCP_UNREF(exec_ctx, tcp, "destroy");
+  grpc_slice_buffer_reset_and_unref_internal(&tcp->last_read_buffer);
+  TCP_UNREF(tcp, "destroy");
 }
 
 #endif
diff --git a/src/core/lib/iomgr/tcp_posix.h b/src/core/lib/iomgr/tcp_posix.h
index 09051b7ed6..4529c02beb 100644
--- a/src/core/lib/iomgr/tcp_posix.h
+++ b/src/core/lib/iomgr/tcp_posix.h
@@ -37,8 +37,7 @@ extern grpc_core::TraceFlag grpc_tcp_trace;
 
 /* Create a tcp endpoint given a file desciptor and a read slice size.
    Takes ownership of fd. */
-grpc_endpoint* grpc_tcp_create(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               const grpc_channel_args* args,
+grpc_endpoint* grpc_tcp_create(grpc_fd* fd, const grpc_channel_args* args,
                                const char* peer_string);
 
 /* Return the tcp endpoint's fd, or -1 if this is not available. Does not
@@ -50,7 +49,7 @@ int grpc_tcp_fd(grpc_endpoint* ep);
 /* Destroy the tcp endpoint without closing its fd. *fd will be set and done
  * will be called when the endpoint is destroyed.
  * Requires: ep must be a tcp endpoint and fd must not be NULL. */
-void grpc_tcp_destroy_and_release_fd(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                     int* fd, grpc_closure* done);
+void grpc_tcp_destroy_and_release_fd(grpc_endpoint* ep, int* fd,
+                                     grpc_closure* done);
 
 #endif /* GRPC_CORE_LIB_IOMGR_TCP_POSIX_H */
diff --git a/src/core/lib/iomgr/tcp_server.h b/src/core/lib/iomgr/tcp_server.h
index a1757a2b3e..038c765c6c 100644
--- a/src/core/lib/iomgr/tcp_server.h
+++ b/src/core/lib/iomgr/tcp_server.h
@@ -39,22 +39,20 @@ typedef struct grpc_tcp_server_acceptor {
 
 /* Called for newly connected TCP connections.
    Takes ownership of acceptor. */
-typedef void (*grpc_tcp_server_cb)(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_endpoint* ep,
+typedef void (*grpc_tcp_server_cb)(void* arg, grpc_endpoint* ep,
                                    grpc_pollset* accepting_pollset,
                                    grpc_tcp_server_acceptor* acceptor);
 
 /* Create a server, initially not bound to any ports. The caller owns one ref.
    If shutdown_complete is not NULL, it will be used by
    grpc_tcp_server_unref() when the ref count reaches zero. */
-grpc_error* grpc_tcp_server_create(grpc_exec_ctx* exec_ctx,
-                                   grpc_closure* shutdown_complete,
+grpc_error* grpc_tcp_server_create(grpc_closure* shutdown_complete,
                                    const grpc_channel_args* args,
                                    grpc_tcp_server** server);
 
 /* Start listening to bound ports */
-void grpc_tcp_server_start(grpc_exec_ctx* exec_ctx, grpc_tcp_server* server,
-                           grpc_pollset** pollsets, size_t pollset_count,
+void grpc_tcp_server_start(grpc_tcp_server* server, grpc_pollset** pollsets,
+                           size_t pollset_count,
                            grpc_tcp_server_cb on_accept_cb, void* cb_arg);
 
 /* Add a port to the server, returning the newly allocated port on success, or
@@ -92,10 +90,9 @@ void grpc_tcp_server_shutdown_starting_add(grpc_tcp_server* s,
 
 /* If the refcount drops to zero, enqueue calls on exec_ctx to
    shutdown_listeners and delete s. */
-void grpc_tcp_server_unref(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s);
+void grpc_tcp_server_unref(grpc_tcp_server* s);
 
 /* Shutdown the fds of listeners. */
-void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx* exec_ctx,
-                                        grpc_tcp_server* s);
+void grpc_tcp_server_shutdown_listeners(grpc_tcp_server* s);
 
 #endif /* GRPC_CORE_LIB_IOMGR_TCP_SERVER_H */
diff --git a/src/core/lib/iomgr/tcp_server_posix.cc b/src/core/lib/iomgr/tcp_server_posix.cc
index 6fed13c6c7..99e1c6cd06 100644
--- a/src/core/lib/iomgr/tcp_server_posix.cc
+++ b/src/core/lib/iomgr/tcp_server_posix.cc
@@ -68,8 +68,7 @@ static void init(void) {
 #endif
 }
 
-grpc_error* grpc_tcp_server_create(grpc_exec_ctx* exec_ctx,
-                                   grpc_closure* shutdown_complete,
+grpc_error* grpc_tcp_server_create(grpc_closure* shutdown_complete,
                                    const grpc_channel_args* args,
                                    grpc_tcp_server** server) {
   gpr_once_init(&check_init, init);
@@ -116,12 +115,12 @@ grpc_error* grpc_tcp_server_create(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static void finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+static void finish_shutdown(grpc_tcp_server* s) {
   gpr_mu_lock(&s->mu);
   GPR_ASSERT(s->shutdown);
   gpr_mu_unlock(&s->mu);
   if (s->shutdown_complete != nullptr) {
-    GRPC_CLOSURE_SCHED(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(s->shutdown_complete, GRPC_ERROR_NONE);
   }
 
   gpr_mu_destroy(&s->mu);
@@ -131,19 +130,18 @@ static void finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
     s->head = sp->next;
     gpr_free(sp);
   }
-  grpc_channel_args_destroy(exec_ctx, s->channel_args);
+  grpc_channel_args_destroy(s->channel_args);
 
   gpr_free(s);
 }
 
-static void destroyed_port(grpc_exec_ctx* exec_ctx, void* server,
-                           grpc_error* error) {
+static void destroyed_port(void* server, grpc_error* error) {
   grpc_tcp_server* s = (grpc_tcp_server*)server;
   gpr_mu_lock(&s->mu);
   s->destroyed_ports++;
   if (s->destroyed_ports == s->nports) {
     gpr_mu_unlock(&s->mu);
-    finish_shutdown(exec_ctx, s);
+    finish_shutdown(s);
   } else {
     GPR_ASSERT(s->destroyed_ports < s->nports);
     gpr_mu_unlock(&s->mu);
@@ -153,7 +151,7 @@ static void destroyed_port(grpc_exec_ctx* exec_ctx, void* server,
 /* called when all listening endpoints have been shutdown, so no further
    events will be received on them - at this point it's safe to destroy
    things */
-static void deactivated_all_ports(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+static void deactivated_all_ports(grpc_tcp_server* s) {
   /* delete ALL the things */
   gpr_mu_lock(&s->mu);
 
@@ -165,17 +163,17 @@ static void deactivated_all_ports(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
       grpc_unlink_if_unix_domain_socket(&sp->addr);
       GRPC_CLOSURE_INIT(&sp->destroyed_closure, destroyed_port, s,
                         grpc_schedule_on_exec_ctx);
-      grpc_fd_orphan(exec_ctx, sp->emfd, &sp->destroyed_closure, nullptr,
+      grpc_fd_orphan(sp->emfd, &sp->destroyed_closure, nullptr,
                      false /* already_closed */, "tcp_listener_shutdown");
     }
     gpr_mu_unlock(&s->mu);
   } else {
     gpr_mu_unlock(&s->mu);
-    finish_shutdown(exec_ctx, s);
+    finish_shutdown(s);
   }
 }
 
-static void tcp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+static void tcp_server_destroy(grpc_tcp_server* s) {
   gpr_mu_lock(&s->mu);
 
   GPR_ASSERT(!s->shutdown);
@@ -186,18 +184,17 @@ static void tcp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
     grpc_tcp_listener* sp;
     for (sp = s->head; sp; sp = sp->next) {
       grpc_fd_shutdown(
-          exec_ctx, sp->emfd,
-          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server destroyed"));
+          sp->emfd, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server destroyed"));
     }
     gpr_mu_unlock(&s->mu);
   } else {
     gpr_mu_unlock(&s->mu);
-    deactivated_all_ports(exec_ctx, s);
+    deactivated_all_ports(s);
   }
 }
 
 /* event manager callback when reads are ready */
-static void on_read(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* err) {
+static void on_read(void* arg, grpc_error* err) {
   grpc_tcp_listener* sp = (grpc_tcp_listener*)arg;
   grpc_pollset* read_notifier_pollset;
   if (err != GRPC_ERROR_NONE) {
@@ -223,7 +220,7 @@ static void on_read(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* err) {
         case EINTR:
           continue;
         case EAGAIN:
-          grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+          grpc_fd_notify_on_read(sp->emfd, &sp->read_closure);
           return;
         default:
           gpr_mu_lock(&sp->server->mu);
@@ -249,7 +246,7 @@ static void on_read(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* err) {
 
     grpc_fd* fdobj = grpc_fd_create(fd, name);
 
-    grpc_pollset_add_fd(exec_ctx, read_notifier_pollset, fdobj);
+    grpc_pollset_add_fd(read_notifier_pollset, fdobj);
 
     // Create acceptor.
     grpc_tcp_server_acceptor* acceptor =
@@ -259,8 +256,8 @@ static void on_read(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* err) {
     acceptor->fd_index = sp->fd_index;
 
     sp->server->on_accept_cb(
-        exec_ctx, sp->server->on_accept_cb_arg,
-        grpc_tcp_create(exec_ctx, fdobj, sp->server->channel_args, addr_str),
+        sp->server->on_accept_cb_arg,
+        grpc_tcp_create(fdobj, sp->server->channel_args, addr_str),
         read_notifier_pollset, acceptor);
 
     gpr_free(name);
@@ -273,7 +270,7 @@ error:
   gpr_mu_lock(&sp->server->mu);
   if (0 == --sp->server->active_ports && sp->server->shutdown) {
     gpr_mu_unlock(&sp->server->mu);
-    deactivated_all_ports(exec_ctx, sp->server);
+    deactivated_all_ports(sp->server);
   } else {
     gpr_mu_unlock(&sp->server->mu);
   }
@@ -483,8 +480,8 @@ int grpc_tcp_server_port_fd(grpc_tcp_server* s, unsigned port_index,
   return -1;
 }
 
-void grpc_tcp_server_start(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s,
-                           grpc_pollset** pollsets, size_t pollset_count,
+void grpc_tcp_server_start(grpc_tcp_server* s, grpc_pollset** pollsets,
+                           size_t pollset_count,
                            grpc_tcp_server_cb on_accept_cb,
                            void* on_accept_cb_arg) {
   size_t i;
@@ -504,20 +501,20 @@ void grpc_tcp_server_start(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s,
       GPR_ASSERT(GRPC_LOG_IF_ERROR(
           "clone_port", clone_port(sp, (unsigned)(pollset_count - 1))));
       for (i = 0; i < pollset_count; i++) {
-        grpc_pollset_add_fd(exec_ctx, pollsets[i], sp->emfd);
+        grpc_pollset_add_fd(pollsets[i], sp->emfd);
         GRPC_CLOSURE_INIT(&sp->read_closure, on_read, sp,
                           grpc_schedule_on_exec_ctx);
-        grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+        grpc_fd_notify_on_read(sp->emfd, &sp->read_closure);
         s->active_ports++;
         sp = sp->next;
       }
     } else {
       for (i = 0; i < pollset_count; i++) {
-        grpc_pollset_add_fd(exec_ctx, pollsets[i], sp->emfd);
+        grpc_pollset_add_fd(pollsets[i], sp->emfd);
       }
       GRPC_CLOSURE_INIT(&sp->read_closure, on_read, sp,
                         grpc_schedule_on_exec_ctx);
-      grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+      grpc_fd_notify_on_read(sp->emfd, &sp->read_closure);
       s->active_ports++;
       sp = sp->next;
     }
@@ -538,25 +535,24 @@ void grpc_tcp_server_shutdown_starting_add(grpc_tcp_server* s,
   gpr_mu_unlock(&s->mu);
 }
 
-void grpc_tcp_server_unref(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+void grpc_tcp_server_unref(grpc_tcp_server* s) {
   if (gpr_unref(&s->refs)) {
-    grpc_tcp_server_shutdown_listeners(exec_ctx, s);
+    grpc_tcp_server_shutdown_listeners(s);
     gpr_mu_lock(&s->mu);
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx, &s->shutdown_starting);
+    GRPC_CLOSURE_LIST_SCHED(&s->shutdown_starting);
     gpr_mu_unlock(&s->mu);
-    tcp_server_destroy(exec_ctx, s);
+    tcp_server_destroy(s);
   }
 }
 
-void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx* exec_ctx,
-                                        grpc_tcp_server* s) {
+void grpc_tcp_server_shutdown_listeners(grpc_tcp_server* s) {
   gpr_mu_lock(&s->mu);
   s->shutdown_listeners = true;
   /* shutdown all fd's */
   if (s->active_ports) {
     grpc_tcp_listener* sp;
     for (sp = s->head; sp; sp = sp->next) {
-      grpc_fd_shutdown(exec_ctx, sp->emfd,
+      grpc_fd_shutdown(sp->emfd,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server shutdown"));
     }
   }
diff --git a/src/core/lib/iomgr/tcp_server_uv.cc b/src/core/lib/iomgr/tcp_server_uv.cc
index ffadf0b1ab..1ac49190fb 100644
--- a/src/core/lib/iomgr/tcp_server_uv.cc
+++ b/src/core/lib/iomgr/tcp_server_uv.cc
@@ -73,8 +73,7 @@ struct grpc_tcp_server {
   grpc_resource_quota* resource_quota;
 };
 
-grpc_error* grpc_tcp_server_create(grpc_exec_ctx* exec_ctx,
-                                   grpc_closure* shutdown_complete,
+grpc_error* grpc_tcp_server_create(grpc_closure* shutdown_complete,
                                    const grpc_channel_args* args,
                                    grpc_tcp_server** server) {
   grpc_tcp_server* s = (grpc_tcp_server*)gpr_malloc(sizeof(grpc_tcp_server));
@@ -82,11 +81,11 @@ grpc_error* grpc_tcp_server_create(grpc_exec_ctx* exec_ctx,
   for (size_t i = 0; i < (args == NULL ? 0 : args->num_args); i++) {
     if (0 == strcmp(GRPC_ARG_RESOURCE_QUOTA, args->args[i].key)) {
       if (args->args[i].type == GRPC_ARG_POINTER) {
-        grpc_resource_quota_unref_internal(exec_ctx, s->resource_quota);
+        grpc_resource_quota_unref_internal(s->resource_quota);
         s->resource_quota = grpc_resource_quota_ref_internal(
             (grpc_resource_quota*)args->args[i].value.pointer.p);
       } else {
-        grpc_resource_quota_unref_internal(exec_ctx, s->resource_quota);
+        grpc_resource_quota_unref_internal(s->resource_quota);
         gpr_free(s);
         return GRPC_ERROR_CREATE_FROM_STATIC_STRING(
             GRPC_ARG_RESOURCE_QUOTA " must be a pointer to a buffer pool");
@@ -119,10 +118,10 @@ void grpc_tcp_server_shutdown_starting_add(grpc_tcp_server* s,
                            GRPC_ERROR_NONE);
 }
 
-static void finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+static void finish_shutdown(grpc_tcp_server* s) {
   GPR_ASSERT(s->shutdown);
   if (s->shutdown_complete != NULL) {
-    GRPC_CLOSURE_SCHED(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(s->shutdown_complete, GRPC_ERROR_NONE);
   }
 
   while (s->head) {
@@ -132,18 +131,17 @@ static void finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
     gpr_free(sp->handle);
     gpr_free(sp);
   }
-  grpc_resource_quota_unref_internal(exec_ctx, s->resource_quota);
+  grpc_resource_quota_unref_internal(s->resource_quota);
   gpr_free(s);
 }
 
 static void handle_close_callback(uv_handle_t* handle) {
   grpc_tcp_listener* sp = (grpc_tcp_listener*)handle->data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   sp->server->open_ports--;
   if (sp->server->open_ports == 0 && sp->server->shutdown) {
-    finish_shutdown(&exec_ctx, sp->server);
+    finish_shutdown(sp->server);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void close_listener(grpc_tcp_listener* sp) {
@@ -153,7 +151,7 @@ static void close_listener(grpc_tcp_listener* sp) {
   }
 }
 
-static void tcp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+static void tcp_server_destroy(grpc_tcp_server* s) {
   int immediately_done = 0;
   grpc_tcp_listener* sp;
 
@@ -168,28 +166,22 @@ static void tcp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
   }
 
   if (immediately_done) {
-    finish_shutdown(exec_ctx, s);
+    finish_shutdown(s);
   }
 }
 
-void grpc_tcp_server_unref(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+void grpc_tcp_server_unref(grpc_tcp_server* s) {
   GRPC_UV_ASSERT_SAME_THREAD();
   if (gpr_unref(&s->refs)) {
     /* Complete shutdown_starting work before destroying. */
-    grpc_exec_ctx local_exec_ctx = GRPC_EXEC_CTX_INIT;
-    GRPC_CLOSURE_LIST_SCHED(&local_exec_ctx, &s->shutdown_starting);
-    if (exec_ctx == NULL) {
-      grpc_exec_ctx_flush(&local_exec_ctx);
-      tcp_server_destroy(&local_exec_ctx, s);
-      grpc_exec_ctx_finish(&local_exec_ctx);
-    } else {
-      grpc_exec_ctx_finish(&local_exec_ctx);
-      tcp_server_destroy(exec_ctx, s);
-    }
+    grpc_core::ExecCtx exec_ctx;
+    GRPC_CLOSURE_LIST_SCHED(&s->shutdown_starting);
+    grpc_core::ExecCtx::Get()->Flush();
+    tcp_server_destroy(s);
   }
 }
 
-static void finish_accept(grpc_exec_ctx* exec_ctx, grpc_tcp_listener* sp) {
+static void finish_accept(grpc_tcp_listener* sp) {
   grpc_tcp_server_acceptor* acceptor =
       (grpc_tcp_server_acceptor*)gpr_malloc(sizeof(*acceptor));
   uv_tcp_t* client = NULL;
@@ -225,14 +217,13 @@ static void finish_accept(grpc_exec_ctx* exec_ctx, grpc_tcp_listener* sp) {
   acceptor->from_server = sp->server;
   acceptor->port_index = sp->port_index;
   acceptor->fd_index = 0;
-  sp->server->on_accept_cb(exec_ctx, sp->server->on_accept_cb_arg, ep, NULL,
-                           acceptor);
+  sp->server->on_accept_cb(sp->server->on_accept_cb_arg, ep, NULL, acceptor);
   gpr_free(peer_name_string);
 }
 
 static void on_connect(uv_stream_t* server, int status) {
   grpc_tcp_listener* sp = (grpc_tcp_listener*)server->data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   if (status < 0) {
     switch (status) {
@@ -253,11 +244,10 @@ static void on_connect(uv_stream_t* server, int status) {
 
   // Create acceptor.
   if (sp->server->on_accept_cb) {
-    finish_accept(&exec_ctx, sp);
+    finish_accept(sp);
   } else {
     sp->has_pending_connection = true;
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static grpc_error* add_addr_to_server(grpc_tcp_server* s,
@@ -454,8 +444,8 @@ grpc_error* grpc_tcp_server_add_port(grpc_tcp_server* s,
   return error;
 }
 
-void grpc_tcp_server_start(grpc_exec_ctx* exec_ctx, grpc_tcp_server* server,
-                           grpc_pollset** pollsets, size_t pollset_count,
+void grpc_tcp_server_start(grpc_tcp_server* server, grpc_pollset** pollsets,
+                           size_t pollset_count,
                            grpc_tcp_server_cb on_accept_cb, void* cb_arg) {
   grpc_tcp_listener* sp;
   (void)pollsets;
@@ -470,13 +460,12 @@ void grpc_tcp_server_start(grpc_exec_ctx* exec_ctx, grpc_tcp_server* server,
   server->on_accept_cb_arg = cb_arg;
   for (sp = server->head; sp; sp = sp->next) {
     if (sp->has_pending_connection) {
-      finish_accept(exec_ctx, sp);
+      finish_accept(sp);
       sp->has_pending_connection = false;
     }
   }
 }
 
-void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx* exec_ctx,
-                                        grpc_tcp_server* s) {}
+void grpc_tcp_server_shutdown_listeners(grpc_tcp_server* s) {}
 
 #endif /* GRPC_UV */
diff --git a/src/core/lib/iomgr/tcp_server_windows.cc b/src/core/lib/iomgr/tcp_server_windows.cc
index f538194895..8a30dfde43 100644
--- a/src/core/lib/iomgr/tcp_server_windows.cc
+++ b/src/core/lib/iomgr/tcp_server_windows.cc
@@ -94,8 +94,7 @@ struct grpc_tcp_server {
 
 /* Public function. Allocates the proper data structures to hold a
    grpc_tcp_server. */
-grpc_error* grpc_tcp_server_create(grpc_exec_ctx* exec_ctx,
-                                   grpc_closure* shutdown_complete,
+grpc_error* grpc_tcp_server_create(grpc_closure* shutdown_complete,
                                    const grpc_channel_args* args,
                                    grpc_tcp_server** server) {
   grpc_tcp_server* s = (grpc_tcp_server*)gpr_malloc(sizeof(grpc_tcp_server));
@@ -114,8 +113,7 @@ grpc_error* grpc_tcp_server_create(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_server(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
+static void destroy_server(void* arg, grpc_error* error) {
   grpc_tcp_server* s = (grpc_tcp_server*)arg;
 
   /* Now that the accepts have been aborted, we can destroy the sockets.
@@ -128,18 +126,16 @@ static void destroy_server(grpc_exec_ctx* exec_ctx, void* arg,
     grpc_winsocket_destroy(sp->socket);
     gpr_free(sp);
   }
-  grpc_channel_args_destroy(exec_ctx, s->channel_args);
+  grpc_channel_args_destroy(s->channel_args);
   gpr_free(s);
 }
 
-static void finish_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_tcp_server* s) {
+static void finish_shutdown_locked(grpc_tcp_server* s) {
   if (s->shutdown_complete != NULL) {
-    GRPC_CLOSURE_SCHED(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(s->shutdown_complete, GRPC_ERROR_NONE);
   }
 
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_CREATE(destroy_server, s, grpc_schedule_on_exec_ctx),
       GRPC_ERROR_NONE);
 }
@@ -157,14 +153,14 @@ void grpc_tcp_server_shutdown_starting_add(grpc_tcp_server* s,
   gpr_mu_unlock(&s->mu);
 }
 
-static void tcp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+static void tcp_server_destroy(grpc_tcp_server* s) {
   grpc_tcp_listener* sp;
   gpr_mu_lock(&s->mu);
 
   /* First, shutdown all fd's. This will queue abortion calls for all
      of the pending accepts due to the normal operation mechanism. */
   if (s->active_ports == 0) {
-    finish_shutdown_locked(exec_ctx, s);
+    finish_shutdown_locked(s);
   } else {
     for (sp = s->head; sp; sp = sp->next) {
       sp->shutting_down = 1;
@@ -174,13 +170,13 @@ static void tcp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
   gpr_mu_unlock(&s->mu);
 }
 
-void grpc_tcp_server_unref(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+void grpc_tcp_server_unref(grpc_tcp_server* s) {
   if (gpr_unref(&s->refs)) {
-    grpc_tcp_server_shutdown_listeners(exec_ctx, s);
+    grpc_tcp_server_shutdown_listeners(s);
     gpr_mu_lock(&s->mu);
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx, &s->shutdown_starting);
+    GRPC_CLOSURE_LIST_SCHED(&s->shutdown_starting);
     gpr_mu_unlock(&s->mu);
-    tcp_server_destroy(exec_ctx, s);
+    tcp_server_destroy(s);
   }
 }
 
@@ -234,19 +230,17 @@ failure:
   return error;
 }
 
-static void decrement_active_ports_and_notify_locked(grpc_exec_ctx* exec_ctx,
-                                                     grpc_tcp_listener* sp) {
+static void decrement_active_ports_and_notify_locked(grpc_tcp_listener* sp) {
   sp->shutting_down = 0;
   GPR_ASSERT(sp->server->active_ports > 0);
   if (0 == --sp->server->active_ports) {
-    finish_shutdown_locked(exec_ctx, sp->server);
+    finish_shutdown_locked(sp->server);
   }
 }
 
 /* In order to do an async accept, we need to create a socket first which
    will be the one assigned to the new incoming connection. */
-static grpc_error* start_accept_locked(grpc_exec_ctx* exec_ctx,
-                                       grpc_tcp_listener* port) {
+static grpc_error* start_accept_locked(grpc_tcp_listener* port) {
   SOCKET sock = INVALID_SOCKET;
   BOOL success;
   DWORD addrlen = sizeof(struct sockaddr_in6) + 16;
@@ -285,7 +279,7 @@ static grpc_error* start_accept_locked(grpc_exec_ctx* exec_ctx,
   /* We're ready to do the accept. Calling grpc_socket_notify_on_read may
      immediately process an accept that happened in the meantime. */
   port->new_socket = sock;
-  grpc_socket_notify_on_read(exec_ctx, port->socket, &port->on_accept);
+  grpc_socket_notify_on_read(port->socket, &port->on_accept);
   port->outstanding_calls++;
   return error;
 
@@ -296,7 +290,7 @@ failure:
 }
 
 /* Event manager callback when reads are ready. */
-static void on_accept(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_accept(void* arg, grpc_error* error) {
   grpc_tcp_listener* sp = (grpc_tcp_listener*)arg;
   SOCKET sock = sp->new_socket;
   grpc_winsocket_callback_info* info = &sp->socket->read_info;
@@ -357,7 +351,7 @@ static void on_accept(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
         gpr_free(utf8_message);
       }
       gpr_asprintf(&fd_name, "tcp_server:%s", peer_name_string);
-      ep = grpc_tcp_create(exec_ctx, grpc_winsocket_create(sock, fd_name),
+      ep = grpc_tcp_create(grpc_winsocket_create(sock, fd_name),
                            sp->server->channel_args, peer_name_string);
       gpr_free(fd_name);
       gpr_free(peer_name_string);
@@ -375,17 +369,15 @@ static void on_accept(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
     acceptor->from_server = sp->server;
     acceptor->port_index = sp->port_index;
     acceptor->fd_index = 0;
-    sp->server->on_accept_cb(exec_ctx, sp->server->on_accept_cb_arg, ep, NULL,
-                             acceptor);
+    sp->server->on_accept_cb(sp->server->on_accept_cb_arg, ep, NULL, acceptor);
   }
   /* As we were notified from the IOCP of one and exactly one accept,
      the former socked we created has now either been destroy or assigned
      to the new connection. We need to create a new one for the next
      connection. */
-  GPR_ASSERT(
-      GRPC_LOG_IF_ERROR("start_accept", start_accept_locked(exec_ctx, sp)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("start_accept", start_accept_locked(sp)));
   if (0 == --sp->outstanding_calls) {
-    decrement_active_ports_and_notify_locked(exec_ctx, sp);
+    decrement_active_ports_and_notify_locked(sp);
   }
   gpr_mu_unlock(&sp->server->mu);
 }
@@ -522,8 +514,8 @@ done:
   return error;
 }
 
-void grpc_tcp_server_start(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s,
-                           grpc_pollset** pollset, size_t pollset_count,
+void grpc_tcp_server_start(grpc_tcp_server* s, grpc_pollset** pollset,
+                           size_t pollset_count,
                            grpc_tcp_server_cb on_accept_cb,
                            void* on_accept_cb_arg) {
   grpc_tcp_listener* sp;
@@ -534,14 +526,12 @@ void grpc_tcp_server_start(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s,
   s->on_accept_cb = on_accept_cb;
   s->on_accept_cb_arg = on_accept_cb_arg;
   for (sp = s->head; sp; sp = sp->next) {
-    GPR_ASSERT(
-        GRPC_LOG_IF_ERROR("start_accept", start_accept_locked(exec_ctx, sp)));
+    GPR_ASSERT(GRPC_LOG_IF_ERROR("start_accept", start_accept_locked(sp)));
     s->active_ports++;
   }
   gpr_mu_unlock(&s->mu);
 }
 
-void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx* exec_ctx,
-                                        grpc_tcp_server* s) {}
+void grpc_tcp_server_shutdown_listeners(grpc_tcp_server* s) {}
 
 #endif /* GRPC_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/tcp_uv.cc b/src/core/lib/iomgr/tcp_uv.cc
index 40f4006203..2c26b60511 100644
--- a/src/core/lib/iomgr/tcp_uv.cc
+++ b/src/core/lib/iomgr/tcp_uv.cc
@@ -65,19 +65,18 @@ typedef struct {
   grpc_pollset* pollset;
 } grpc_tcp;
 
-static void tcp_free(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
-  grpc_resource_user_unref(exec_ctx, tcp->resource_user);
+static void tcp_free(grpc_tcp* tcp) {
+  grpc_resource_user_unref(tcp->resource_user);
   gpr_free(tcp->handle);
   gpr_free(tcp->peer_string);
   gpr_free(tcp);
 }
 
 #ifndef NDEBUG
-#define TCP_UNREF(exec_ctx, tcp, reason) \
-  tcp_unref((exec_ctx), (tcp), (reason), __FILE__, __LINE__)
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp), (reason), __FILE__, __LINE__)
 #define TCP_REF(tcp, reason) tcp_ref((tcp), (reason), __FILE__, __LINE__)
-static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
-                      const char* reason, const char* file, int line) {
+static void tcp_unref(grpc_tcp* tcp, const char* reason, const char* file,
+                      int line) {
   if (grpc_tcp_trace.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&tcp->refcount.count);
     gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
@@ -85,7 +84,7 @@ static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
             val - 1);
   }
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(exec_ctx, tcp);
+    tcp_free(tcp);
   }
 }
 
@@ -100,11 +99,11 @@ static void tcp_ref(grpc_tcp* tcp, const char* reason, const char* file,
   gpr_ref(&tcp->refcount);
 }
 #else
-#define TCP_UNREF(exec_ctx, tcp, reason) tcp_unref((exec_ctx), (tcp))
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp))
 #define TCP_REF(tcp, reason) tcp_ref((tcp))
-static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void tcp_unref(grpc_tcp* tcp) {
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(exec_ctx, tcp);
+    tcp_free(tcp);
   }
 }
 
@@ -112,15 +111,14 @@ static void tcp_ref(grpc_tcp* tcp) { gpr_ref(&tcp->refcount); }
 #endif
 
 static void uv_close_callback(uv_handle_t* handle) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp* tcp = (grpc_tcp*)handle->data;
-  TCP_UNREF(&exec_ctx, tcp, "destroy");
-  grpc_exec_ctx_finish(&exec_ctx);
+  TCP_UNREF(tcp, "destroy");
 }
 
 static void alloc_uv_buf(uv_handle_t* handle, size_t suggested_size,
                          uv_buf_t* buf) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp* tcp = (grpc_tcp*)handle->data;
   (void)suggested_size;
   /* Before calling uv_read_start, we allocate a buffer with exactly one slice
@@ -128,11 +126,9 @@ static void alloc_uv_buf(uv_handle_t* handle, size_t suggested_size,
    * allocation was successful. So slices[0] should always exist here */
   buf->base = (char*)GRPC_SLICE_START_PTR(tcp->read_slices->slices[0]);
   buf->len = GRPC_SLICE_LENGTH(tcp->read_slices->slices[0]);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void call_read_cb(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
-                         grpc_error* error) {
+static void call_read_cb(grpc_tcp* tcp, grpc_error* error) {
   grpc_closure* cb = tcp->read_cb;
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "TCP:%p call_cb %p %p:%p", tcp, cb, cb->cb, cb->cb_arg);
@@ -149,25 +145,25 @@ static void call_read_cb(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
   }
   tcp->read_slices = NULL;
   tcp->read_cb = NULL;
-  GRPC_CLOSURE_RUN(exec_ctx, cb, error);
+  GRPC_CLOSURE_RUN(cb, error);
 }
 
 static void read_callback(uv_stream_t* stream, ssize_t nread,
                           const uv_buf_t* buf) {
   grpc_error* error;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp* tcp = (grpc_tcp*)stream->data;
   grpc_slice_buffer garbage;
   if (nread == 0) {
     // Nothing happened. Wait for the next callback
     return;
   }
-  TCP_UNREF(&exec_ctx, tcp, "read");
+  TCP_UNREF(tcp, "read");
   // TODO(murgatroid99): figure out what the return value here means
   uv_read_stop(stream);
   if (nread == UV_EOF) {
     error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("EOF");
-    grpc_slice_buffer_reset_and_unref_internal(&exec_ctx, tcp->read_slices);
+    grpc_slice_buffer_reset_and_unref_internal(tcp->read_slices);
   } else if (nread > 0) {
     // Successful read
     error = GRPC_ERROR_NONE;
@@ -177,19 +173,17 @@ static void read_callback(uv_stream_t* stream, ssize_t nread,
       grpc_slice_buffer_init(&garbage);
       grpc_slice_buffer_trim_end(
           tcp->read_slices, tcp->read_slices->length - (size_t)nread, &garbage);
-      grpc_slice_buffer_reset_and_unref_internal(&exec_ctx, &garbage);
+      grpc_slice_buffer_reset_and_unref_internal(&garbage);
     }
   } else {
     // nread < 0: Error
     error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("TCP Read failed");
-    grpc_slice_buffer_reset_and_unref_internal(&exec_ctx, tcp->read_slices);
+    grpc_slice_buffer_reset_and_unref_internal(tcp->read_slices);
   }
-  call_read_cb(&exec_ctx, tcp, error);
-  grpc_exec_ctx_finish(&exec_ctx);
+  call_read_cb(tcp, error);
 }
 
-static void tcp_read_allocation_done(grpc_exec_ctx* exec_ctx, void* tcpp,
-                                     grpc_error* error) {
+static void tcp_read_allocation_done(void* tcpp, grpc_error* error) {
   int status;
   grpc_tcp* tcp = (grpc_tcp*)tcpp;
   if (grpc_tcp_trace.enabled()) {
@@ -207,9 +201,9 @@ static void tcp_read_allocation_done(grpc_exec_ctx* exec_ctx, void* tcpp,
     }
   }
   if (error != GRPC_ERROR_NONE) {
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, tcp->read_slices);
-    call_read_cb(exec_ctx, tcp, GRPC_ERROR_REF(error));
-    TCP_UNREF(exec_ctx, tcp, "read");
+    grpc_slice_buffer_reset_and_unref_internal(tcp->read_slices);
+    call_read_cb(tcp, GRPC_ERROR_REF(error));
+    TCP_UNREF(tcp, "read");
   }
   if (grpc_tcp_trace.enabled()) {
     const char* str = grpc_error_string(error);
@@ -217,16 +211,16 @@ static void tcp_read_allocation_done(grpc_exec_ctx* exec_ctx, void* tcpp,
   }
 }
 
-static void uv_endpoint_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                             grpc_slice_buffer* read_slices, grpc_closure* cb) {
+static void uv_endpoint_read(grpc_endpoint* ep, grpc_slice_buffer* read_slices,
+                             grpc_closure* cb) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   GRPC_UV_ASSERT_SAME_THREAD();
   GPR_ASSERT(tcp->read_cb == NULL);
   tcp->read_cb = cb;
   tcp->read_slices = read_slices;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, read_slices);
+  grpc_slice_buffer_reset_and_unref_internal(read_slices);
   TCP_REF(tcp, "read");
-  grpc_resource_user_alloc_slices(exec_ctx, &tcp->slice_allocator,
+  grpc_resource_user_alloc_slices(&tcp->slice_allocator,
                                   GRPC_TCP_DEFAULT_READ_SLICE_SIZE, 1,
                                   tcp->read_slices);
 }
@@ -234,10 +228,10 @@ static void uv_endpoint_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
 static void write_callback(uv_write_t* req, int status) {
   grpc_tcp* tcp = (grpc_tcp*)req->data;
   grpc_error* error;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_closure* cb = tcp->write_cb;
   tcp->write_cb = NULL;
-  TCP_UNREF(&exec_ctx, tcp, "write");
+  TCP_UNREF(tcp, "write");
   if (status == 0) {
     error = GRPC_ERROR_NONE;
   } else {
@@ -248,11 +242,10 @@ static void write_callback(uv_write_t* req, int status) {
     gpr_log(GPR_DEBUG, "write complete on %p: error=%s", tcp, str);
   }
   gpr_free(tcp->write_buffers);
-  GRPC_CLOSURE_SCHED(&exec_ctx, cb, error);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CLOSURE_SCHED(cb, error);
 }
 
-static void uv_endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+static void uv_endpoint_write(grpc_endpoint* ep,
                               grpc_slice_buffer* write_slices,
                               grpc_closure* cb) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
@@ -275,9 +268,8 @@ static void uv_endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
   }
 
   if (tcp->shutting_down) {
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, cb,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("TCP socket is shutting down"));
+    GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                               "TCP socket is shutting down"));
     return;
   }
 
@@ -287,7 +279,7 @@ static void uv_endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
   if (tcp->write_slices->count == 0) {
     // No slices means we don't have to do anything,
     // and libuv doesn't like empty writes
-    GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_NONE);
     return;
   }
 
@@ -308,37 +300,31 @@ static void uv_endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
            write_callback);
 }
 
-static void uv_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                              grpc_pollset* pollset) {
+static void uv_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {
   // No-op. We're ignoring pollsets currently
-  (void)exec_ctx;
   (void)ep;
   (void)pollset;
   grpc_tcp* tcp = (grpc_tcp*)ep;
   tcp->pollset = pollset;
 }
 
-static void uv_add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+static void uv_add_to_pollset_set(grpc_endpoint* ep,
                                   grpc_pollset_set* pollset) {
   // No-op. We're ignoring pollsets currently
-  (void)exec_ctx;
   (void)ep;
   (void)pollset;
 }
 
-static void uv_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                       grpc_endpoint* ep,
+static void uv_delete_from_pollset_set(grpc_endpoint* ep,
                                        grpc_pollset_set* pollset) {
   // No-op. We're ignoring pollsets currently
-  (void)exec_ctx;
   (void)ep;
   (void)pollset;
 }
 
 static void shutdown_callback(uv_shutdown_t* req, int status) {}
 
-static void uv_endpoint_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                 grpc_error* why) {
+static void uv_endpoint_shutdown(grpc_endpoint* ep, grpc_error* why) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   if (!tcp->shutting_down) {
     if (grpc_tcp_trace.enabled()) {
@@ -348,12 +334,12 @@ static void uv_endpoint_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
     tcp->shutting_down = true;
     uv_shutdown_t* req = &tcp->shutdown_req;
     uv_shutdown(req, (uv_stream_t*)tcp->handle, shutdown_callback);
-    grpc_resource_user_shutdown(exec_ctx, tcp->resource_user);
+    grpc_resource_user_shutdown(tcp->resource_user);
   }
   GRPC_ERROR_UNREF(why);
 }
 
-static void uv_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+static void uv_destroy(grpc_endpoint* ep) {
   grpc_network_status_unregister_endpoint(ep);
   grpc_tcp* tcp = (grpc_tcp*)ep;
   uv_close((uv_handle_t*)tcp->handle, uv_close_callback);
@@ -386,7 +372,7 @@ grpc_endpoint* grpc_tcp_create(uv_tcp_t* handle,
                                grpc_resource_quota* resource_quota,
                                char* peer_string) {
   grpc_tcp* tcp = (grpc_tcp*)gpr_malloc(sizeof(grpc_tcp));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "Creating TCP endpoint %p", tcp);
@@ -413,7 +399,6 @@ grpc_endpoint* grpc_tcp_create(uv_tcp_t* handle,
   uv_unref((uv_handle_t*)handle);
 #endif
 
-  grpc_exec_ctx_finish(&exec_ctx);
   return &tcp->base;
 }
 
diff --git a/src/core/lib/iomgr/tcp_windows.cc b/src/core/lib/iomgr/tcp_windows.cc
index 33868cdc7a..6d091b77bb 100644
--- a/src/core/lib/iomgr/tcp_windows.cc
+++ b/src/core/lib/iomgr/tcp_windows.cc
@@ -109,21 +109,20 @@ typedef struct grpc_tcp {
   char* peer_string;
 } grpc_tcp;
 
-static void tcp_free(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void tcp_free(grpc_tcp* tcp) {
   grpc_winsocket_destroy(tcp->socket);
   gpr_mu_destroy(&tcp->mu);
   gpr_free(tcp->peer_string);
-  grpc_resource_user_unref(exec_ctx, tcp->resource_user);
+  grpc_resource_user_unref(tcp->resource_user);
   if (tcp->shutting_down) GRPC_ERROR_UNREF(tcp->shutdown_error);
   gpr_free(tcp);
 }
 
 #ifndef NDEBUG
-#define TCP_UNREF(exec_ctx, tcp, reason) \
-  tcp_unref((exec_ctx), (tcp), (reason), __FILE__, __LINE__)
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp), (reason), __FILE__, __LINE__)
 #define TCP_REF(tcp, reason) tcp_ref((tcp), (reason), __FILE__, __LINE__)
-static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
-                      const char* reason, const char* file, int line) {
+static void tcp_unref(grpc_tcp* tcp, const char* reason, const char* file,
+                      int line) {
   if (grpc_tcp_trace.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&tcp->refcount.count);
     gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
@@ -131,7 +130,7 @@ static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
             val - 1);
   }
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(exec_ctx, tcp);
+    tcp_free(tcp);
   }
 }
 
@@ -146,11 +145,11 @@ static void tcp_ref(grpc_tcp* tcp, const char* reason, const char* file,
   gpr_ref(&tcp->refcount);
 }
 #else
-#define TCP_UNREF(exec_ctx, tcp, reason) tcp_unref((exec_ctx), (tcp))
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp))
 #define TCP_REF(tcp, reason) tcp_ref((tcp))
-static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void tcp_unref(grpc_tcp* tcp) {
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(exec_ctx, tcp);
+    tcp_free(tcp);
   }
 }
 
@@ -158,7 +157,7 @@ static void tcp_ref(grpc_tcp* tcp) { gpr_ref(&tcp->refcount); }
 #endif
 
 /* Asynchronous callback from the IOCP, or the background thread. */
-static void on_read(grpc_exec_ctx* exec_ctx, void* tcpp, grpc_error* error) {
+static void on_read(void* tcpp, grpc_error* error) {
   grpc_tcp* tcp = (grpc_tcp*)tcpp;
   grpc_closure* cb = tcp->read_cb;
   grpc_winsocket* socket = tcp->socket;
@@ -172,13 +171,13 @@ static void on_read(grpc_exec_ctx* exec_ctx, void* tcpp, grpc_error* error) {
       char* utf8_message = gpr_format_message(info->wsa_error);
       error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(utf8_message);
       gpr_free(utf8_message);
-      grpc_slice_unref_internal(exec_ctx, tcp->read_slice);
+      grpc_slice_unref_internal(tcp->read_slice);
     } else {
       if (info->bytes_transfered != 0 && !tcp->shutting_down) {
         sub = grpc_slice_sub_no_ref(tcp->read_slice, 0, info->bytes_transfered);
         grpc_slice_buffer_add(tcp->read_slices, sub);
       } else {
-        grpc_slice_unref_internal(exec_ctx, tcp->read_slice);
+        grpc_slice_unref_internal(tcp->read_slice);
         error = tcp->shutting_down
                     ? GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                           "TCP stream shutting down", &tcp->shutdown_error, 1)
@@ -188,12 +187,12 @@ static void on_read(grpc_exec_ctx* exec_ctx, void* tcpp, grpc_error* error) {
   }
 
   tcp->read_cb = NULL;
-  TCP_UNREF(exec_ctx, tcp, "read");
-  GRPC_CLOSURE_SCHED(exec_ctx, cb, error);
+  TCP_UNREF(tcp, "read");
+  GRPC_CLOSURE_SCHED(cb, error);
 }
 
-static void win_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                     grpc_slice_buffer* read_slices, grpc_closure* cb) {
+static void win_read(grpc_endpoint* ep, grpc_slice_buffer* read_slices,
+                     grpc_closure* cb) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   grpc_winsocket* handle = tcp->socket;
   grpc_winsocket_callback_info* info = &handle->read_info;
@@ -204,15 +203,14 @@ static void win_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
 
   if (tcp->shutting_down) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx, cb,
-        GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-            "TCP socket is shutting down", &tcp->shutdown_error, 1));
+        cb, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                "TCP socket is shutting down", &tcp->shutdown_error, 1));
     return;
   }
 
   tcp->read_cb = cb;
   tcp->read_slices = read_slices;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, read_slices);
+  grpc_slice_buffer_reset_and_unref_internal(read_slices);
 
   tcp->read_slice = GRPC_SLICE_MALLOC(8192);
 
@@ -230,7 +228,7 @@ static void win_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
   /* Did we get data immediately ? Yay. */
   if (info->wsa_error != WSAEWOULDBLOCK) {
     info->bytes_transfered = bytes_read;
-    GRPC_CLOSURE_SCHED(exec_ctx, &tcp->on_read, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&tcp->on_read, GRPC_ERROR_NONE);
     return;
   }
 
@@ -243,17 +241,17 @@ static void win_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
     int wsa_error = WSAGetLastError();
     if (wsa_error != WSA_IO_PENDING) {
       info->wsa_error = wsa_error;
-      GRPC_CLOSURE_SCHED(exec_ctx, &tcp->on_read,
+      GRPC_CLOSURE_SCHED(&tcp->on_read,
                          GRPC_WSA_ERROR(info->wsa_error, "WSARecv"));
       return;
     }
   }
 
-  grpc_socket_notify_on_read(exec_ctx, tcp->socket, &tcp->on_read);
+  grpc_socket_notify_on_read(tcp->socket, &tcp->on_read);
 }
 
 /* Asynchronous callback from the IOCP, or the background thread. */
-static void on_write(grpc_exec_ctx* exec_ctx, void* tcpp, grpc_error* error) {
+static void on_write(void* tcpp, grpc_error* error) {
   grpc_tcp* tcp = (grpc_tcp*)tcpp;
   grpc_winsocket* handle = tcp->socket;
   grpc_winsocket_callback_info* info = &handle->write_info;
@@ -274,13 +272,13 @@ static void on_write(grpc_exec_ctx* exec_ctx, void* tcpp, grpc_error* error) {
     }
   }
 
-  TCP_UNREF(exec_ctx, tcp, "write");
-  GRPC_CLOSURE_SCHED(exec_ctx, cb, error);
+  TCP_UNREF(tcp, "write");
+  GRPC_CLOSURE_SCHED(cb, error);
 }
 
 /* Initiates a write. */
-static void win_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                      grpc_slice_buffer* slices, grpc_closure* cb) {
+static void win_write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                      grpc_closure* cb) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   grpc_winsocket* socket = tcp->socket;
   grpc_winsocket_callback_info* info = &socket->write_info;
@@ -294,9 +292,8 @@ static void win_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
 
   if (tcp->shutting_down) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx, cb,
-        GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-            "TCP socket is shutting down", &tcp->shutdown_error, 1));
+        cb, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                "TCP socket is shutting down", &tcp->shutdown_error, 1));
     return;
   }
 
@@ -327,7 +324,7 @@ static void win_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
     grpc_error* error = status == 0
                             ? GRPC_ERROR_NONE
                             : GRPC_WSA_ERROR(info->wsa_error, "WSASend");
-    GRPC_CLOSURE_SCHED(exec_ctx, cb, error);
+    GRPC_CLOSURE_SCHED(cb, error);
     if (allocated) gpr_free(allocated);
     return;
   }
@@ -344,35 +341,32 @@ static void win_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
   if (status != 0) {
     int wsa_error = WSAGetLastError();
     if (wsa_error != WSA_IO_PENDING) {
-      TCP_UNREF(exec_ctx, tcp, "write");
-      GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_WSA_ERROR(wsa_error, "WSASend"));
+      TCP_UNREF(tcp, "write");
+      GRPC_CLOSURE_SCHED(cb, GRPC_WSA_ERROR(wsa_error, "WSASend"));
       return;
     }
   }
 
   /* As all is now setup, we can now ask for the IOCP notification. It may
      trigger the callback immediately however, but no matter. */
-  grpc_socket_notify_on_write(exec_ctx, socket, &tcp->on_write);
+  grpc_socket_notify_on_write(socket, &tcp->on_write);
 }
 
-static void win_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                               grpc_pollset* ps) {
+static void win_add_to_pollset(grpc_endpoint* ep, grpc_pollset* ps) {
   grpc_tcp* tcp;
   (void)ps;
   tcp = (grpc_tcp*)ep;
   grpc_iocp_add_socket(tcp->socket);
 }
 
-static void win_add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                   grpc_pollset_set* pss) {
+static void win_add_to_pollset_set(grpc_endpoint* ep, grpc_pollset_set* pss) {
   grpc_tcp* tcp;
   (void)pss;
   tcp = (grpc_tcp*)ep;
   grpc_iocp_add_socket(tcp->socket);
 }
 
-static void win_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_endpoint* ep,
+static void win_delete_from_pollset_set(grpc_endpoint* ep,
                                         grpc_pollset_set* pss) {}
 
 /* Initiates a shutdown of the TCP endpoint. This will queue abort callbacks
@@ -381,8 +375,7 @@ static void win_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
    we're not going to protect against these. However the IO Completion Port
    callback will happen from another thread, so we need to protect against
    concurrent access of the data structure in that regard. */
-static void win_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                         grpc_error* why) {
+static void win_shutdown(grpc_endpoint* ep, grpc_error* why) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   gpr_mu_lock(&tcp->mu);
   /* At that point, what may happen is that we're already inside the IOCP
@@ -395,13 +388,13 @@ static void win_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
   }
   grpc_winsocket_shutdown(tcp->socket);
   gpr_mu_unlock(&tcp->mu);
-  grpc_resource_user_shutdown(exec_ctx, tcp->resource_user);
+  grpc_resource_user_shutdown(tcp->resource_user);
 }
 
-static void win_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+static void win_destroy(grpc_endpoint* ep) {
   grpc_network_status_unregister_endpoint(ep);
   grpc_tcp* tcp = (grpc_tcp*)ep;
-  TCP_UNREF(exec_ctx, tcp, "destroy");
+  TCP_UNREF(tcp, "destroy");
 }
 
 static char* win_get_peer(grpc_endpoint* ep) {
@@ -427,14 +420,14 @@ static grpc_endpoint_vtable vtable = {win_read,
                                       win_get_peer,
                                       win_get_fd};
 
-grpc_endpoint* grpc_tcp_create(grpc_exec_ctx* exec_ctx, grpc_winsocket* socket,
+grpc_endpoint* grpc_tcp_create(grpc_winsocket* socket,
                                grpc_channel_args* channel_args,
                                const char* peer_string) {
   grpc_resource_quota* resource_quota = grpc_resource_quota_create(NULL);
   if (channel_args != NULL) {
     for (size_t i = 0; i < channel_args->num_args; i++) {
       if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
-        grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+        grpc_resource_quota_unref_internal(resource_quota);
         resource_quota = grpc_resource_quota_ref_internal(
             (grpc_resource_quota*)channel_args->args[i].value.pointer.p);
       }
@@ -452,7 +445,7 @@ grpc_endpoint* grpc_tcp_create(grpc_exec_ctx* exec_ctx, grpc_winsocket* socket,
   tcp->resource_user = grpc_resource_user_create(resource_quota, peer_string);
   /* Tell network status tracking code about the new endpoint */
   grpc_network_status_register_endpoint(&tcp->base);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
 
   return &tcp->base;
 }
diff --git a/src/core/lib/iomgr/tcp_windows.h b/src/core/lib/iomgr/tcp_windows.h
index 28287e2795..8578a358ea 100644
--- a/src/core/lib/iomgr/tcp_windows.h
+++ b/src/core/lib/iomgr/tcp_windows.h
@@ -38,7 +38,7 @@
 /* Create a tcp endpoint given a winsock handle.
  * Takes ownership of the handle.
  */
-grpc_endpoint* grpc_tcp_create(grpc_exec_ctx* exec_ctx, grpc_winsocket* socket,
+grpc_endpoint* grpc_tcp_create(grpc_winsocket* socket,
                                grpc_channel_args* channel_args,
                                const char* peer_string);
 
diff --git a/src/core/lib/iomgr/timer.h b/src/core/lib/iomgr/timer.h
index b9acce229e..82049859c5 100644
--- a/src/core/lib/iomgr/timer.h
+++ b/src/core/lib/iomgr/timer.h
@@ -40,8 +40,8 @@ typedef struct grpc_timer grpc_timer;
    application code should check the error to determine how it was invoked. The
    application callback is also responsible for maintaining information about
    when to free up any user-level state. */
-void grpc_timer_init(grpc_exec_ctx* exec_ctx, grpc_timer* timer,
-                     grpc_millis deadline, grpc_closure* closure);
+void grpc_timer_init(grpc_timer* timer, grpc_millis deadline,
+                     grpc_closure* closure);
 
 /* Initialize *timer without setting it. This can later be passed through
    the regular init or cancel */
@@ -73,7 +73,7 @@ void grpc_timer_init_unset(grpc_timer* timer);
    matches this aim.
 
    Requires: cancel() must happen after init() on a given timer */
-void grpc_timer_cancel(grpc_exec_ctx* exec_ctx, grpc_timer* timer);
+void grpc_timer_cancel(grpc_timer* timer);
 
 /* iomgr internal api for dealing with timers */
 
@@ -90,10 +90,9 @@ typedef enum {
    *next is never guaranteed to be updated on any given execution; however,
    with high probability at least one thread in the system will see an update
    at any time slice. */
-grpc_timer_check_result grpc_timer_check(grpc_exec_ctx* exec_ctx,
-                                         grpc_millis* next);
-void grpc_timer_list_init(grpc_exec_ctx* exec_ctx);
-void grpc_timer_list_shutdown(grpc_exec_ctx* exec_ctx);
+grpc_timer_check_result grpc_timer_check(grpc_millis* next);
+void grpc_timer_list_init();
+void grpc_timer_list_shutdown();
 
 /* Consume a kick issued by grpc_kick_poller */
 void grpc_timer_consume_kick(void);
diff --git a/src/core/lib/iomgr/timer_generic.cc b/src/core/lib/iomgr/timer_generic.cc
index fa95c43dbe..103144eb3b 100644
--- a/src/core/lib/iomgr/timer_generic.cc
+++ b/src/core/lib/iomgr/timer_generic.cc
@@ -225,8 +225,7 @@ static gpr_atm saturating_add(gpr_atm a, gpr_atm b) {
   return a + b;
 }
 
-static grpc_timer_check_result run_some_expired_timers(grpc_exec_ctx* exec_ctx,
-                                                       gpr_atm now,
+static grpc_timer_check_result run_some_expired_timers(gpr_atm now,
                                                        gpr_atm* next,
                                                        grpc_error* error);
 
@@ -236,7 +235,7 @@ static gpr_atm compute_min_deadline(timer_shard* shard) {
              : grpc_timer_heap_top(&shard->heap)->deadline;
 }
 
-void grpc_timer_list_init(grpc_exec_ctx* exec_ctx) {
+void grpc_timer_list_init() {
   uint32_t i;
 
   g_num_shards = GPR_MIN(1, 2 * gpr_cpu_num_cores());
@@ -247,7 +246,7 @@ void grpc_timer_list_init(grpc_exec_ctx* exec_ctx) {
   g_shared_mutables.initialized = true;
   g_shared_mutables.checker_mu = GPR_SPINLOCK_INITIALIZER;
   gpr_mu_init(&g_shared_mutables.mu);
-  g_shared_mutables.min_timer = grpc_exec_ctx_now(exec_ctx);
+  g_shared_mutables.min_timer = grpc_core::ExecCtx::Get()->Now();
   gpr_tls_init(&g_last_seen_min_timer);
   gpr_tls_set(&g_last_seen_min_timer, 0);
 
@@ -267,10 +266,10 @@ void grpc_timer_list_init(grpc_exec_ctx* exec_ctx) {
   INIT_TIMER_HASH_TABLE();
 }
 
-void grpc_timer_list_shutdown(grpc_exec_ctx* exec_ctx) {
+void grpc_timer_list_shutdown() {
   size_t i;
   run_some_expired_timers(
-      exec_ctx, GPR_ATM_MAX, nullptr,
+      GPR_ATM_MAX, nullptr,
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("Timer list shutdown"));
   for (i = 0; i < g_num_shards; i++) {
     timer_shard* shard = &g_shards[i];
@@ -323,8 +322,8 @@ static void note_deadline_change(timer_shard* shard) {
 
 void grpc_timer_init_unset(grpc_timer* timer) { timer->pending = false; }
 
-void grpc_timer_init(grpc_exec_ctx* exec_ctx, grpc_timer* timer,
-                     grpc_millis deadline, grpc_closure* closure) {
+void grpc_timer_init(grpc_timer* timer, grpc_millis deadline,
+                     grpc_closure* closure) {
   int is_first_timer = 0;
   timer_shard* shard = &g_shards[GPR_HASH_POINTER(timer, g_num_shards)];
   timer->closure = closure;
@@ -337,12 +336,12 @@ void grpc_timer_init(grpc_exec_ctx* exec_ctx, grpc_timer* timer,
   if (grpc_timer_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "TIMER %p: SET %" PRIdPTR " now %" PRIdPTR " call %p[%p]", timer,
-            deadline, grpc_exec_ctx_now(exec_ctx), closure, closure->cb);
+            deadline, grpc_core::ExecCtx::Get()->Now(), closure, closure->cb);
   }
 
   if (!g_shared_mutables.initialized) {
     timer->pending = false;
-    GRPC_CLOSURE_SCHED(exec_ctx, timer->closure,
+    GRPC_CLOSURE_SCHED(timer->closure,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                            "Attempt to create timer before initialization"));
     return;
@@ -350,10 +349,10 @@ void grpc_timer_init(grpc_exec_ctx* exec_ctx, grpc_timer* timer,
 
   gpr_mu_lock(&shard->mu);
   timer->pending = true;
-  grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+  grpc_millis now = grpc_core::ExecCtx::Get()->Now();
   if (deadline <= now) {
     timer->pending = false;
-    GRPC_CLOSURE_SCHED(exec_ctx, timer->closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_NONE);
     gpr_mu_unlock(&shard->mu);
     /* early out */
     return;
@@ -414,7 +413,7 @@ void grpc_timer_consume_kick(void) {
   gpr_tls_set(&g_last_seen_min_timer, 0);
 }
 
-void grpc_timer_cancel(grpc_exec_ctx* exec_ctx, grpc_timer* timer) {
+void grpc_timer_cancel(grpc_timer* timer) {
   if (!g_shared_mutables.initialized) {
     /* must have already been cancelled, also the shard mutex is invalid */
     return;
@@ -430,7 +429,7 @@ void grpc_timer_cancel(grpc_exec_ctx* exec_ctx, grpc_timer* timer) {
   if (timer->pending) {
     REMOVE_FROM_HASH_TABLE(timer);
 
-    GRPC_CLOSURE_SCHED(exec_ctx, timer->closure, GRPC_ERROR_CANCELLED);
+    GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_CANCELLED);
     timer->pending = false;
     if (timer->heap_index == INVALID_HEAP_INDEX) {
       list_remove(timer);
@@ -516,15 +515,14 @@ static grpc_timer* pop_one(timer_shard* shard, gpr_atm now) {
 }
 
 /* REQUIRES: shard->mu unlocked */
-static size_t pop_timers(grpc_exec_ctx* exec_ctx, timer_shard* shard,
-                         gpr_atm now, gpr_atm* new_min_deadline,
-                         grpc_error* error) {
+static size_t pop_timers(timer_shard* shard, gpr_atm now,
+                         gpr_atm* new_min_deadline, grpc_error* error) {
   size_t n = 0;
   grpc_timer* timer;
   gpr_mu_lock(&shard->mu);
   while ((timer = pop_one(shard, now))) {
     REMOVE_FROM_HASH_TABLE(timer);
-    GRPC_CLOSURE_SCHED(exec_ctx, timer->closure, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_REF(error));
     n++;
   }
   *new_min_deadline = compute_min_deadline(shard);
@@ -536,8 +534,7 @@ static size_t pop_timers(grpc_exec_ctx* exec_ctx, timer_shard* shard,
   return n;
 }
 
-static grpc_timer_check_result run_some_expired_timers(grpc_exec_ctx* exec_ctx,
-                                                       gpr_atm now,
+static grpc_timer_check_result run_some_expired_timers(gpr_atm now,
                                                        gpr_atm* next,
                                                        grpc_error* error) {
   grpc_timer_check_result result = GRPC_TIMERS_NOT_CHECKED;
@@ -566,8 +563,7 @@ static grpc_timer_check_result run_some_expired_timers(grpc_exec_ctx* exec_ctx,
       /* For efficiency, we pop as many available timers as we can from the
          shard.  This may violate perfect timer deadline ordering, but that
          shouldn't be a big deal because we don't make ordering guarantees. */
-      if (pop_timers(exec_ctx, g_shard_queue[0], now, &new_min_deadline,
-                     error) > 0) {
+      if (pop_timers(g_shard_queue[0], now, &new_min_deadline, error) > 0) {
         result = GRPC_TIMERS_FIRED;
       }
 
@@ -604,10 +600,9 @@ static grpc_timer_check_result run_some_expired_timers(grpc_exec_ctx* exec_ctx,
   return result;
 }
 
-grpc_timer_check_result grpc_timer_check(grpc_exec_ctx* exec_ctx,
-                                         grpc_millis* next) {
+grpc_timer_check_result grpc_timer_check(grpc_millis* next) {
   // prelude
-  grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+  grpc_millis now = grpc_core::ExecCtx::Get()->Now();
 
   /* fetch from a thread-local first: this avoids contention on a globally
      mutable cacheline in the common case */
@@ -646,7 +641,7 @@ grpc_timer_check_result grpc_timer_check(grpc_exec_ctx* exec_ctx,
   }
   // actual code
   grpc_timer_check_result r =
-      run_some_expired_timers(exec_ctx, now, next, shutdown_error);
+      run_some_expired_timers(now, next, shutdown_error);
   // tracing
   if (grpc_timer_check_trace.enabled()) {
     char* next_str;
diff --git a/src/core/lib/iomgr/timer_manager.cc b/src/core/lib/iomgr/timer_manager.cc
index dac74aea24..7fb068f10f 100644
--- a/src/core/lib/iomgr/timer_manager.cc
+++ b/src/core/lib/iomgr/timer_manager.cc
@@ -93,18 +93,17 @@ static void start_timer_thread_and_unlock(void) {
   // to leak through g_completed_threads and be freed in gc_completed_threads()
   // before "&ct->t" is written to, causing a use-after-free.
   gpr_mu_lock(&g_mu);
-  gpr_thd_new(&ct->t, timer_thread, ct, &opt);
+  gpr_thd_new(&ct->t, "grpc_global_timer", timer_thread, ct, &opt);
   gpr_mu_unlock(&g_mu);
 }
 
 void grpc_timer_manager_tick() {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_millis next = GRPC_MILLIS_INF_FUTURE;
-  grpc_timer_check(&exec_ctx, &next);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_timer_check(&next);
 }
 
-static void run_some_timers(grpc_exec_ctx* exec_ctx) {
+static void run_some_timers() {
   // if there's something to execute...
   gpr_mu_lock(&g_mu);
   // remove a waiter from the pool, and start another thread if necessary
@@ -126,7 +125,7 @@ static void run_some_timers(grpc_exec_ctx* exec_ctx) {
   if (grpc_timer_check_trace.enabled()) {
     gpr_log(GPR_DEBUG, "flush exec_ctx");
   }
-  grpc_exec_ctx_flush(exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_mu_lock(&g_mu);
   // garbage collect any threads hanging out that are dead
   gc_completed_threads();
@@ -138,7 +137,7 @@ static void run_some_timers(grpc_exec_ctx* exec_ctx) {
 // wait until 'next' (or forever if there is already a timed waiter in the pool)
 // returns true if the thread should continue executing (false if it should
 // shutdown)
-static bool wait_until(grpc_exec_ctx* exec_ctx, grpc_millis next) {
+static bool wait_until(grpc_millis next) {
   gpr_mu_lock(&g_mu);
   // if we're not threaded anymore, leave
   if (!g_threaded) {
@@ -179,7 +178,7 @@ static bool wait_until(grpc_exec_ctx* exec_ctx, grpc_millis next) {
         g_timed_waiter_deadline = next;
 
         if (grpc_timer_check_trace.enabled()) {
-          grpc_millis wait_time = next - grpc_exec_ctx_now(exec_ctx);
+          grpc_millis wait_time = next - grpc_core::ExecCtx::Get()->Now();
           gpr_log(GPR_DEBUG, "sleep for a %" PRIdPTR " milliseconds",
                   wait_time);
         }
@@ -193,7 +192,7 @@ static bool wait_until(grpc_exec_ctx* exec_ctx, grpc_millis next) {
     }
 
     gpr_cv_wait(&g_cv_wait, &g_mu,
-                grpc_millis_to_timespec(next, GPR_CLOCK_REALTIME));
+                grpc_millis_to_timespec(next, GPR_CLOCK_MONOTONIC));
 
     if (grpc_timer_check_trace.enabled()) {
       gpr_log(GPR_DEBUG, "wait ended: was_timed:%d kicked:%d",
@@ -220,15 +219,15 @@ static bool wait_until(grpc_exec_ctx* exec_ctx, grpc_millis next) {
   return true;
 }
 
-static void timer_main_loop(grpc_exec_ctx* exec_ctx) {
+static void timer_main_loop() {
   for (;;) {
     grpc_millis next = GRPC_MILLIS_INF_FUTURE;
-    grpc_exec_ctx_invalidate_now(exec_ctx);
+    grpc_core::ExecCtx::Get()->InvalidateNow();
 
     // check timer state, updates next to the next time to run a check
-    switch (grpc_timer_check(exec_ctx, &next)) {
+    switch (grpc_timer_check(&next)) {
       case GRPC_TIMERS_FIRED:
-        run_some_timers(exec_ctx);
+        run_some_timers();
         break;
       case GRPC_TIMERS_NOT_CHECKED:
         /* This case only happens under contention, meaning more than one timer
@@ -246,7 +245,7 @@ static void timer_main_loop(grpc_exec_ctx* exec_ctx) {
         next = GRPC_MILLIS_INF_FUTURE;
       /* fall through */
       case GRPC_TIMERS_CHECKED_AND_EMPTY:
-        if (!wait_until(exec_ctx, next)) {
+        if (!wait_until(next)) {
           return;
         }
         break;
@@ -274,10 +273,9 @@ static void timer_thread_cleanup(completed_thread* ct) {
 static void timer_thread(void* completed_thread_ptr) {
   // this threads exec_ctx: we try to run things through to completion here
   // since it's easy to spin up new threads
-  grpc_exec_ctx exec_ctx =
-      GRPC_EXEC_CTX_INITIALIZER(0, grpc_never_ready_to_finish, nullptr);
-  timer_main_loop(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx(0);
+  timer_main_loop();
+
   timer_thread_cleanup((completed_thread*)completed_thread_ptr);
 }
 
@@ -319,7 +317,7 @@ static void stop_threads(void) {
       gpr_log(GPR_DEBUG, "num timer threads: %d", g_thread_count);
     }
     while (g_thread_count > 0) {
-      gpr_cv_wait(&g_cv_shutdown, &g_mu, gpr_inf_future(GPR_CLOCK_REALTIME));
+      gpr_cv_wait(&g_cv_shutdown, &g_mu, gpr_inf_future(GPR_CLOCK_MONOTONIC));
       if (grpc_timer_check_trace.enabled()) {
         gpr_log(GPR_DEBUG, "num timer threads: %d", g_thread_count);
       }
diff --git a/src/core/lib/iomgr/timer_uv.cc b/src/core/lib/iomgr/timer_uv.cc
index fac2026fa9..5d238da089 100644
--- a/src/core/lib/iomgr/timer_uv.cc
+++ b/src/core/lib/iomgr/timer_uv.cc
@@ -42,28 +42,27 @@ static void stop_uv_timer(uv_timer_t* handle) {
 
 void run_expired_timer(uv_timer_t* handle) {
   grpc_timer* timer = (grpc_timer*)handle->data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_UV_ASSERT_SAME_THREAD();
   GPR_ASSERT(timer->pending);
   timer->pending = 0;
-  GRPC_CLOSURE_SCHED(&exec_ctx, timer->closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_NONE);
   stop_uv_timer(handle);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-void grpc_timer_init(grpc_exec_ctx* exec_ctx, grpc_timer* timer,
-                     grpc_millis deadline, grpc_closure* closure) {
+void grpc_timer_init(grpc_timer* timer, grpc_millis deadline,
+                     grpc_closure* closure) {
   uint64_t timeout;
   uv_timer_t* uv_timer;
   GRPC_UV_ASSERT_SAME_THREAD();
   timer->closure = closure;
-  if (deadline <= grpc_exec_ctx_now(exec_ctx)) {
+  if (deadline <= grpc_core::ExecCtx::Get()->Now()) {
     timer->pending = 0;
-    GRPC_CLOSURE_SCHED(exec_ctx, timer->closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_NONE);
     return;
   }
   timer->pending = 1;
-  timeout = (uint64_t)(deadline - grpc_exec_ctx_now(exec_ctx));
+  timeout = (uint64_t)(deadline - grpc_core::ExecCtx::Get()->Now());
   uv_timer = (uv_timer_t*)gpr_malloc(sizeof(uv_timer_t));
   uv_timer_init(uv_default_loop(), uv_timer);
   uv_timer->data = timer;
@@ -77,22 +76,21 @@ void grpc_timer_init(grpc_exec_ctx* exec_ctx, grpc_timer* timer,
 
 void grpc_timer_init_unset(grpc_timer* timer) { timer->pending = 0; }
 
-void grpc_timer_cancel(grpc_exec_ctx* exec_ctx, grpc_timer* timer) {
+void grpc_timer_cancel(grpc_timer* timer) {
   GRPC_UV_ASSERT_SAME_THREAD();
   if (timer->pending) {
     timer->pending = 0;
-    GRPC_CLOSURE_SCHED(exec_ctx, timer->closure, GRPC_ERROR_CANCELLED);
+    GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_CANCELLED);
     stop_uv_timer((uv_timer_t*)timer->uv_timer);
   }
 }
 
-grpc_timer_check_result grpc_timer_check(grpc_exec_ctx* exec_ctx,
-                                         grpc_millis* next) {
+grpc_timer_check_result grpc_timer_check(grpc_millis* next) {
   return GRPC_TIMERS_NOT_CHECKED;
 }
 
-void grpc_timer_list_init(grpc_exec_ctx* exec_ctx) {}
-void grpc_timer_list_shutdown(grpc_exec_ctx* exec_ctx) {}
+void grpc_timer_list_init() {}
+void grpc_timer_list_shutdown() {}
 
 void grpc_timer_consume_kick(void) {}
 
diff --git a/src/core/lib/iomgr/udp_server.cc b/src/core/lib/iomgr/udp_server.cc
index 7b7d6946b1..55e0b165ec 100644
--- a/src/core/lib/iomgr/udp_server.cc
+++ b/src/core/lib/iomgr/udp_server.cc
@@ -150,31 +150,30 @@ grpc_udp_server* grpc_udp_server_create(const grpc_channel_args* args) {
   return s;
 }
 
-static void shutdown_fd(grpc_exec_ctx* exec_ctx, void* args,
-                        grpc_error* error) {
+static void shutdown_fd(void* args, grpc_error* error) {
   struct shutdown_fd_args* shutdown_args = (struct shutdown_fd_args*)args;
   grpc_udp_listener* sp = shutdown_args->sp;
   gpr_log(GPR_DEBUG, "shutdown fd %d", sp->fd);
   gpr_mu_lock(shutdown_args->server_mu);
-  grpc_fd_shutdown(exec_ctx, sp->emfd, GRPC_ERROR_REF(error));
+  grpc_fd_shutdown(sp->emfd, GRPC_ERROR_REF(error));
   sp->already_shutdown = true;
   if (!sp->notify_on_write_armed) {
     // Re-arm write notification to notify listener with error. This is
     // necessary to decrement active_ports.
     sp->notify_on_write_armed = true;
-    grpc_fd_notify_on_write(exec_ctx, sp->emfd, &sp->write_closure);
+    grpc_fd_notify_on_write(sp->emfd, &sp->write_closure);
   }
   gpr_mu_unlock(shutdown_args->server_mu);
   gpr_free(shutdown_args);
 }
 
-static void dummy_cb(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void dummy_cb(void* arg, grpc_error* error) {
   // No-op.
 }
 
-static void finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_udp_server* s) {
+static void finish_shutdown(grpc_udp_server* s) {
   if (s->shutdown_complete != nullptr) {
-    GRPC_CLOSURE_SCHED(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(s->shutdown_complete, GRPC_ERROR_NONE);
   }
 
   gpr_mu_destroy(&s->mu);
@@ -193,14 +192,13 @@ static void finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_udp_server* s) {
   gpr_free(s);
 }
 
-static void destroyed_port(grpc_exec_ctx* exec_ctx, void* server,
-                           grpc_error* error) {
+static void destroyed_port(void* server, grpc_error* error) {
   grpc_udp_server* s = (grpc_udp_server*)server;
   gpr_mu_lock(&s->mu);
   s->destroyed_ports++;
   if (s->destroyed_ports == s->nports) {
     gpr_mu_unlock(&s->mu);
-    finish_shutdown(exec_ctx, s);
+    finish_shutdown(s);
   } else {
     gpr_mu_unlock(&s->mu);
   }
@@ -209,7 +207,7 @@ static void destroyed_port(grpc_exec_ctx* exec_ctx, void* server,
 /* called when all listening endpoints have been shutdown, so no further
    events will be received on them - at this point it's safe to destroy
    things */
-static void deactivated_all_ports(grpc_exec_ctx* exec_ctx, grpc_udp_server* s) {
+static void deactivated_all_ports(grpc_udp_server* s) {
   /* delete ALL the things */
   gpr_mu_lock(&s->mu);
 
@@ -230,21 +228,19 @@ static void deactivated_all_ports(grpc_exec_ctx* exec_ctx, grpc_udp_server* s) {
                           grpc_schedule_on_exec_ctx);
         GPR_ASSERT(sp->orphan_cb);
         gpr_log(GPR_DEBUG, "Orphan fd %d", sp->fd);
-        sp->orphan_cb(exec_ctx, sp->emfd, &sp->orphan_fd_closure,
-                      sp->server->user_data);
+        sp->orphan_cb(sp->emfd, &sp->orphan_fd_closure, sp->server->user_data);
       }
-      grpc_fd_orphan(exec_ctx, sp->emfd, &sp->destroyed_closure, nullptr,
+      grpc_fd_orphan(sp->emfd, &sp->destroyed_closure, nullptr,
                      false /* already_closed */, "udp_listener_shutdown");
     }
     gpr_mu_unlock(&s->mu);
   } else {
     gpr_mu_unlock(&s->mu);
-    finish_shutdown(exec_ctx, s);
+    finish_shutdown(s);
   }
 }
 
-void grpc_udp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_udp_server* s,
-                             grpc_closure* on_done) {
+void grpc_udp_server_destroy(grpc_udp_server* s, grpc_closure* on_done) {
   grpc_udp_listener* sp;
   gpr_mu_lock(&s->mu);
 
@@ -264,14 +260,13 @@ void grpc_udp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_udp_server* s,
       args->server_mu = &s->mu;
       GRPC_CLOSURE_INIT(&sp->orphan_fd_closure, shutdown_fd, args,
                         grpc_schedule_on_exec_ctx);
-      sp->orphan_cb(exec_ctx, sp->emfd, &sp->orphan_fd_closure,
-                    sp->server->user_data);
+      sp->orphan_cb(sp->emfd, &sp->orphan_fd_closure, sp->server->user_data);
       sp->orphan_notified = true;
     }
     gpr_mu_unlock(&s->mu);
   } else {
     gpr_mu_unlock(&s->mu);
-    deactivated_all_ports(exec_ctx, s);
+    deactivated_all_ports(s);
   }
 }
 
@@ -350,7 +345,7 @@ error:
   return -1;
 }
 
-static void do_read(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void do_read(void* arg, grpc_error* error) {
   grpc_udp_listener* sp = reinterpret_cast<grpc_udp_listener*>(arg);
   GPR_ASSERT(sp->read_cb && error == GRPC_ERROR_NONE);
   /* TODO: the reason we hold server->mu here is merely to prevent fd
@@ -358,29 +353,28 @@ static void do_read(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
    * read lock if available. */
   gpr_mu_lock(&sp->server->mu);
   /* Tell the registered callback that data is available to read. */
-  if (!sp->already_shutdown &&
-      sp->read_cb(exec_ctx, sp->emfd, sp->server->user_data)) {
+  if (!sp->already_shutdown && sp->read_cb(sp->emfd, sp->server->user_data)) {
     /* There maybe more packets to read. Schedule read_more_cb_ closure to run
      * after finishing this event loop. */
-    GRPC_CLOSURE_SCHED(exec_ctx, &sp->do_read_closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&sp->do_read_closure, GRPC_ERROR_NONE);
   } else {
     /* Finish reading all the packets, re-arm the notification event so we can
      * get another chance to read. Or fd already shutdown, re-arm to get a
      * notification with shutdown error. */
-    grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+    grpc_fd_notify_on_read(sp->emfd, &sp->read_closure);
   }
   gpr_mu_unlock(&sp->server->mu);
 }
 
 /* event manager callback when reads are ready */
-static void on_read(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_read(void* arg, grpc_error* error) {
   grpc_udp_listener* sp = (grpc_udp_listener*)arg;
 
   gpr_mu_lock(&sp->server->mu);
   if (error != GRPC_ERROR_NONE) {
     if (0 == --sp->server->active_ports && sp->server->shutdown) {
       gpr_mu_unlock(&sp->server->mu);
-      deactivated_all_ports(exec_ctx, sp->server);
+      deactivated_all_ports(sp->server);
     } else {
       gpr_mu_unlock(&sp->server->mu);
     }
@@ -389,59 +383,57 @@ static void on_read(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
   /* Read once. If there is more data to read, off load the work to another
    * thread to finish. */
   GPR_ASSERT(sp->read_cb);
-  if (sp->read_cb(exec_ctx, sp->emfd, sp->server->user_data)) {
+  if (sp->read_cb(sp->emfd, sp->server->user_data)) {
     /* There maybe more packets to read. Schedule read_more_cb_ closure to run
      * after finishing this event loop. */
     GRPC_CLOSURE_INIT(&sp->do_read_closure, do_read, arg,
                       grpc_executor_scheduler(GRPC_EXECUTOR_LONG));
-    GRPC_CLOSURE_SCHED(exec_ctx, &sp->do_read_closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&sp->do_read_closure, GRPC_ERROR_NONE);
   } else {
     /* Finish reading all the packets, re-arm the notification event so we can
      * get another chance to read. Or fd already shutdown, re-arm to get a
      * notification with shutdown error. */
-    grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+    grpc_fd_notify_on_read(sp->emfd, &sp->read_closure);
   }
   gpr_mu_unlock(&sp->server->mu);
 }
 
 // Wrapper of grpc_fd_notify_on_write() with a grpc_closure callback interface.
-void fd_notify_on_write_wrapper(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_error* error) {
+void fd_notify_on_write_wrapper(void* arg, grpc_error* error) {
   grpc_udp_listener* sp = reinterpret_cast<grpc_udp_listener*>(arg);
   gpr_mu_lock(&sp->server->mu);
   if (!sp->notify_on_write_armed) {
-    grpc_fd_notify_on_write(exec_ctx, sp->emfd, &sp->write_closure);
+    grpc_fd_notify_on_write(sp->emfd, &sp->write_closure);
     sp->notify_on_write_armed = true;
   }
   gpr_mu_unlock(&sp->server->mu);
 }
 
-static void do_write(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void do_write(void* arg, grpc_error* error) {
   grpc_udp_listener* sp = reinterpret_cast<grpc_udp_listener*>(arg);
   gpr_mu_lock(&(sp->server->mu));
   if (sp->already_shutdown) {
     // If fd has been shutdown, don't write any more and re-arm notification.
-    grpc_fd_notify_on_write(exec_ctx, sp->emfd, &sp->write_closure);
+    grpc_fd_notify_on_write(sp->emfd, &sp->write_closure);
   } else {
     sp->notify_on_write_armed = false;
     /* Tell the registered callback that the socket is writeable. */
     GPR_ASSERT(sp->write_cb && error == GRPC_ERROR_NONE);
     GRPC_CLOSURE_INIT(&sp->notify_on_write_closure, fd_notify_on_write_wrapper,
                       arg, grpc_schedule_on_exec_ctx);
-    sp->write_cb(exec_ctx, sp->emfd, sp->server->user_data,
-                 &sp->notify_on_write_closure);
+    sp->write_cb(sp->emfd, sp->server->user_data, &sp->notify_on_write_closure);
   }
   gpr_mu_unlock(&sp->server->mu);
 }
 
-static void on_write(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_write(void* arg, grpc_error* error) {
   grpc_udp_listener* sp = (grpc_udp_listener*)arg;
 
   gpr_mu_lock(&(sp->server->mu));
   if (error != GRPC_ERROR_NONE) {
     if (0 == --sp->server->active_ports && sp->server->shutdown) {
       gpr_mu_unlock(&sp->server->mu);
-      deactivated_all_ports(exec_ctx, sp->server);
+      deactivated_all_ports(sp->server);
     } else {
       gpr_mu_unlock(&sp->server->mu);
     }
@@ -452,7 +444,7 @@ static void on_write(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
   GRPC_CLOSURE_INIT(&sp->do_write_closure, do_write, arg,
                     grpc_executor_scheduler(GRPC_EXECUTOR_LONG));
 
-  GRPC_CLOSURE_SCHED(exec_ctx, &sp->do_write_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(&sp->do_write_closure, GRPC_ERROR_NONE);
   gpr_mu_unlock(&sp->server->mu);
 }
 
@@ -593,9 +585,8 @@ int grpc_udp_server_get_fd(grpc_udp_server* s, unsigned port_index) {
   return sp->fd;
 }
 
-void grpc_udp_server_start(grpc_exec_ctx* exec_ctx, grpc_udp_server* s,
-                           grpc_pollset** pollsets, size_t pollset_count,
-                           void* user_data) {
+void grpc_udp_server_start(grpc_udp_server* s, grpc_pollset** pollsets,
+                           size_t pollset_count, void* user_data) {
   size_t i;
   gpr_mu_lock(&s->mu);
   grpc_udp_listener* sp;
@@ -606,16 +597,16 @@ void grpc_udp_server_start(grpc_exec_ctx* exec_ctx, grpc_udp_server* s,
   sp = s->head;
   while (sp != nullptr) {
     for (i = 0; i < pollset_count; i++) {
-      grpc_pollset_add_fd(exec_ctx, pollsets[i], sp->emfd);
+      grpc_pollset_add_fd(pollsets[i], sp->emfd);
     }
     GRPC_CLOSURE_INIT(&sp->read_closure, on_read, sp,
                       grpc_schedule_on_exec_ctx);
-    grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+    grpc_fd_notify_on_read(sp->emfd, &sp->read_closure);
 
     GRPC_CLOSURE_INIT(&sp->write_closure, on_write, sp,
                       grpc_schedule_on_exec_ctx);
     sp->notify_on_write_armed = true;
-    grpc_fd_notify_on_write(exec_ctx, sp->emfd, &sp->write_closure);
+    grpc_fd_notify_on_write(sp->emfd, &sp->write_closure);
 
     /* Registered for both read and write callbacks: increment active_ports
      * twice to account for this, and delay free-ing of memory until both
diff --git a/src/core/lib/iomgr/udp_server.h b/src/core/lib/iomgr/udp_server.h
index 1bd6922de6..02e3acb7f5 100644
--- a/src/core/lib/iomgr/udp_server.h
+++ b/src/core/lib/iomgr/udp_server.h
@@ -32,18 +32,15 @@ typedef struct grpc_udp_server grpc_udp_server;
 
 /* Called when data is available to read from the socket.
  * Return true if there is more data to read from fd. */
-typedef bool (*grpc_udp_server_read_cb)(grpc_exec_ctx* exec_ctx, grpc_fd* emfd,
-                                        void* user_data);
+typedef bool (*grpc_udp_server_read_cb)(grpc_fd* emfd, void* user_data);
 
 /* Called when the socket is writeable. The given closure should be scheduled
  * when the socket becomes blocked next time. */
-typedef void (*grpc_udp_server_write_cb)(grpc_exec_ctx* exec_ctx, grpc_fd* emfd,
-                                         void* user_data,
+typedef void (*grpc_udp_server_write_cb)(grpc_fd* emfd, void* user_data,
                                          grpc_closure* notify_on_write_closure);
 
 /* Called when the grpc_fd is about to be orphaned (and the FD closed). */
-typedef void (*grpc_udp_server_orphan_cb)(grpc_exec_ctx* exec_ctx,
-                                          grpc_fd* emfd,
+typedef void (*grpc_udp_server_orphan_cb)(grpc_fd* emfd,
                                           grpc_closure* shutdown_fd_callback,
                                           void* user_data);
 
@@ -51,9 +48,8 @@ typedef void (*grpc_udp_server_orphan_cb)(grpc_exec_ctx* exec_ctx,
 grpc_udp_server* grpc_udp_server_create(const grpc_channel_args* args);
 
 /* Start listening to bound ports. user_data is passed to callbacks. */
-void grpc_udp_server_start(grpc_exec_ctx* exec_ctx, grpc_udp_server* udp_server,
-                           grpc_pollset** pollsets, size_t pollset_count,
-                           void* user_data);
+void grpc_udp_server_start(grpc_udp_server* udp_server, grpc_pollset** pollsets,
+                           size_t pollset_count, void* user_data);
 
 int grpc_udp_server_get_fd(grpc_udp_server* s, unsigned port_index);
 
@@ -73,7 +69,6 @@ int grpc_udp_server_add_port(grpc_udp_server* s,
                              grpc_udp_server_write_cb write_cb,
                              grpc_udp_server_orphan_cb orphan_cb);
 
-void grpc_udp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_udp_server* server,
-                             grpc_closure* on_done);
+void grpc_udp_server_destroy(grpc_udp_server* server, grpc_closure* on_done);
 
 #endif /* GRPC_CORE_LIB_IOMGR_UDP_SERVER_H */
diff --git a/src/core/lib/profiling/basic_timers.cc b/src/core/lib/profiling/basic_timers.cc
index 3ec6280e6b..87dd4ab120 100644
--- a/src/core/lib/profiling/basic_timers.cc
+++ b/src/core/lib/profiling/basic_timers.cc
@@ -203,7 +203,8 @@ void gpr_timers_set_log_filename(const char* filename) {
 static void init_output() {
   gpr_thd_options options = gpr_thd_options_default();
   gpr_thd_options_set_joinable(&options);
-  GPR_ASSERT(gpr_thd_new(&g_writing_thread, writing_thread, NULL, &options));
+  GPR_ASSERT(gpr_thd_new(&g_writing_thread, "timer_output_thread",
+                         writing_thread, NULL, &options));
   atexit(finish_writing);
 }
 
diff --git a/src/core/lib/security/context/security_context.cc b/src/core/lib/security/context/security_context.cc
index 19c6148e43..0371027994 100644
--- a/src/core/lib/security/context/security_context.cc
+++ b/src/core/lib/security/context/security_context.cc
@@ -36,7 +36,7 @@ grpc_core::DebugOnlyTraceFlag grpc_trace_auth_context_refcount(
 
 grpc_call_error grpc_call_set_credentials(grpc_call* call,
                                           grpc_call_credentials* creds) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_client_security_context* ctx = nullptr;
   GRPC_API_TRACE("grpc_call_set_credentials(call=%p, creds=%p)", 2,
                  (call, creds));
@@ -52,10 +52,10 @@ grpc_call_error grpc_call_set_credentials(grpc_call* call,
     grpc_call_context_set(call, GRPC_CONTEXT_SECURITY, ctx,
                           grpc_client_security_context_destroy);
   } else {
-    grpc_call_credentials_unref(&exec_ctx, ctx->creds);
+    grpc_call_credentials_unref(ctx->creds);
     ctx->creds = grpc_call_credentials_ref(creds);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return GRPC_CALL_OK;
 }
 
@@ -85,15 +85,14 @@ grpc_client_security_context* grpc_client_security_context_create(void) {
 }
 
 void grpc_client_security_context_destroy(void* ctx) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_client_security_context* c = (grpc_client_security_context*)ctx;
-  grpc_call_credentials_unref(&exec_ctx, c->creds);
+  grpc_call_credentials_unref(c->creds);
   GRPC_AUTH_CONTEXT_UNREF(c->auth_context, "client_security_context");
   if (c->extension.instance != nullptr && c->extension.destroy != nullptr) {
     c->extension.destroy(c->extension.instance);
   }
   gpr_free(ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 /* --- grpc_server_security_context --- */
@@ -141,7 +140,7 @@ grpc_auth_context* grpc_auth_context_ref(grpc_auth_context* ctx,
   }
 #else
 grpc_auth_context* grpc_auth_context_ref(grpc_auth_context* ctx) {
-  if (ctx == NULL) return NULL;
+  if (ctx == nullptr) return nullptr;
 #endif
   gpr_ref(&ctx->refcount);
   return ctx;
@@ -159,7 +158,7 @@ void grpc_auth_context_unref(grpc_auth_context* ctx, const char* file, int line,
   }
 #else
 void grpc_auth_context_unref(grpc_auth_context* ctx) {
-  if (ctx == NULL) return;
+  if (ctx == nullptr) return;
 #endif
   if (gpr_unref(&ctx->refcount)) {
     size_t i;
@@ -303,7 +302,7 @@ void grpc_auth_property_reset(grpc_auth_property* property) {
   memset(property, 0, sizeof(grpc_auth_property));
 }
 
-static void auth_context_pointer_arg_destroy(grpc_exec_ctx* exec_ctx, void* p) {
+static void auth_context_pointer_arg_destroy(void* p) {
   GRPC_AUTH_CONTEXT_UNREF((grpc_auth_context*)p, "auth_context_pointer_arg");
 }
 
diff --git a/src/core/lib/security/credentials/composite/composite_credentials.cc b/src/core/lib/security/credentials/composite/composite_credentials.cc
index 93dd721240..e4c1604795 100644
--- a/src/core/lib/security/credentials/composite/composite_credentials.cc
+++ b/src/core/lib/security/credentials/composite/composite_credentials.cc
@@ -39,17 +39,15 @@ typedef struct {
   grpc_closure internal_on_request_metadata;
 } grpc_composite_call_credentials_metadata_context;
 
-static void composite_call_destruct(grpc_exec_ctx* exec_ctx,
-                                    grpc_call_credentials* creds) {
+static void composite_call_destruct(grpc_call_credentials* creds) {
   grpc_composite_call_credentials* c = (grpc_composite_call_credentials*)creds;
   for (size_t i = 0; i < c->inner.num_creds; i++) {
-    grpc_call_credentials_unref(exec_ctx, c->inner.creds_array[i]);
+    grpc_call_credentials_unref(c->inner.creds_array[i]);
   }
   gpr_free(c->inner.creds_array);
 }
 
-static void composite_call_metadata_cb(grpc_exec_ctx* exec_ctx, void* arg,
-                                       grpc_error* error) {
+static void composite_call_metadata_cb(void* arg, grpc_error* error) {
   grpc_composite_call_credentials_metadata_context* ctx =
       (grpc_composite_call_credentials_metadata_context*)arg;
   if (error == GRPC_ERROR_NONE) {
@@ -58,23 +56,23 @@ static void composite_call_metadata_cb(grpc_exec_ctx* exec_ctx, void* arg,
       grpc_call_credentials* inner_creds =
           ctx->composite_creds->inner.creds_array[ctx->creds_index++];
       if (grpc_call_credentials_get_request_metadata(
-              exec_ctx, inner_creds, ctx->pollent, ctx->auth_md_context,
-              ctx->md_array, &ctx->internal_on_request_metadata, &error)) {
+              inner_creds, ctx->pollent, ctx->auth_md_context, ctx->md_array,
+              &ctx->internal_on_request_metadata, &error)) {
         // Synchronous response, so call ourselves recursively.
-        composite_call_metadata_cb(exec_ctx, arg, error);
+        composite_call_metadata_cb(arg, error);
         GRPC_ERROR_UNREF(error);
       }
       return;
     }
     // We're done!
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, ctx->on_request_metadata, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_SCHED(ctx->on_request_metadata, GRPC_ERROR_REF(error));
   gpr_free(ctx);
 }
 
 static bool composite_call_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_polling_entity* pollent, grpc_auth_metadata_context auth_md_context,
+    grpc_call_credentials* creds, grpc_polling_entity* pollent,
+    grpc_auth_metadata_context auth_md_context,
     grpc_credentials_mdelem_array* md_array, grpc_closure* on_request_metadata,
     grpc_error** error) {
   grpc_composite_call_credentials* c = (grpc_composite_call_credentials*)creds;
@@ -93,8 +91,8 @@ static bool composite_call_get_request_metadata(
     grpc_call_credentials* inner_creds =
         ctx->composite_creds->inner.creds_array[ctx->creds_index++];
     if (grpc_call_credentials_get_request_metadata(
-            exec_ctx, inner_creds, ctx->pollent, ctx->auth_md_context,
-            ctx->md_array, &ctx->internal_on_request_metadata, error)) {
+            inner_creds, ctx->pollent, ctx->auth_md_context, ctx->md_array,
+            &ctx->internal_on_request_metadata, error)) {
       if (*error != GRPC_ERROR_NONE) break;
     } else {
       synchronous = false;  // Async return.
@@ -106,12 +104,12 @@ static bool composite_call_get_request_metadata(
 }
 
 static void composite_call_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* creds, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   grpc_composite_call_credentials* c = (grpc_composite_call_credentials*)creds;
   for (size_t i = 0; i < c->inner.num_creds; ++i) {
     grpc_call_credentials_cancel_get_request_metadata(
-        exec_ctx, c->inner.creds_array[i], md_array, GRPC_ERROR_REF(error));
+        c->inner.creds_array[i], md_array, GRPC_ERROR_REF(error));
   }
   GRPC_ERROR_UNREF(error);
 }
@@ -200,19 +198,17 @@ grpc_call_credentials* grpc_credentials_contains_type(
 
 /* -- Composite channel credentials. -- */
 
-static void composite_channel_destruct(grpc_exec_ctx* exec_ctx,
-                                       grpc_channel_credentials* creds) {
+static void composite_channel_destruct(grpc_channel_credentials* creds) {
   grpc_composite_channel_credentials* c =
       (grpc_composite_channel_credentials*)creds;
-  grpc_channel_credentials_unref(exec_ctx, c->inner_creds);
-  grpc_call_credentials_unref(exec_ctx, c->call_creds);
+  grpc_channel_credentials_unref(c->inner_creds);
+  grpc_call_credentials_unref(c->call_creds);
 }
 
 static grpc_security_status composite_channel_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* creds,
-    grpc_call_credentials* call_creds, const char* target,
-    const grpc_channel_args* args, grpc_channel_security_connector** sc,
-    grpc_channel_args** new_args) {
+    grpc_channel_credentials* creds, grpc_call_credentials* call_creds,
+    const char* target, const grpc_channel_args* args,
+    grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
   grpc_composite_channel_credentials* c =
       (grpc_composite_channel_credentials*)creds;
   grpc_security_status status = GRPC_SECURITY_ERROR;
@@ -227,12 +223,11 @@ static grpc_security_status composite_channel_create_security_connector(
         grpc_composite_call_credentials_create(c->call_creds, call_creds,
                                                nullptr);
     status = c->inner_creds->vtable->create_security_connector(
-        exec_ctx, c->inner_creds, composite_call_creds, target, args, sc,
-        new_args);
-    grpc_call_credentials_unref(exec_ctx, composite_call_creds);
+        c->inner_creds, composite_call_creds, target, args, sc, new_args);
+    grpc_call_credentials_unref(composite_call_creds);
   } else {
     status = c->inner_creds->vtable->create_security_connector(
-        exec_ctx, c->inner_creds, c->call_creds, target, args, sc, new_args);
+        c->inner_creds, c->call_creds, target, args, sc, new_args);
   }
   return status;
 }
diff --git a/src/core/lib/security/credentials/credentials.cc b/src/core/lib/security/credentials/credentials.cc
index 90576e69b9..48b459e1be 100644
--- a/src/core/lib/security/credentials/credentials.cc
+++ b/src/core/lib/security/credentials/credentials.cc
@@ -47,8 +47,8 @@ grpc_credentials_metadata_request* grpc_credentials_metadata_request_create(
 }
 
 void grpc_credentials_metadata_request_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_credentials_metadata_request* r) {
-  grpc_call_credentials_unref(exec_ctx, r->creds);
+    grpc_credentials_metadata_request* r) {
+  grpc_call_credentials_unref(r->creds);
   grpc_http_response_destroy(&r->response);
   gpr_free(r);
 }
@@ -60,12 +60,11 @@ grpc_channel_credentials* grpc_channel_credentials_ref(
   return creds;
 }
 
-void grpc_channel_credentials_unref(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_credentials* creds) {
+void grpc_channel_credentials_unref(grpc_channel_credentials* creds) {
   if (creds == nullptr) return;
   if (gpr_unref(&creds->refcount)) {
     if (creds->vtable->destruct != nullptr) {
-      creds->vtable->destruct(exec_ctx, creds);
+      creds->vtable->destruct(creds);
     }
     gpr_free(creds);
   }
@@ -73,9 +72,8 @@ void grpc_channel_credentials_unref(grpc_exec_ctx* exec_ctx,
 
 void grpc_channel_credentials_release(grpc_channel_credentials* creds) {
   GRPC_API_TRACE("grpc_channel_credentials_release(creds=%p)", 1, (creds));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_channel_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_channel_credentials_unref(creds);
 }
 
 grpc_call_credentials* grpc_call_credentials_ref(grpc_call_credentials* creds) {
@@ -84,12 +82,11 @@ grpc_call_credentials* grpc_call_credentials_ref(grpc_call_credentials* creds) {
   return creds;
 }
 
-void grpc_call_credentials_unref(grpc_exec_ctx* exec_ctx,
-                                 grpc_call_credentials* creds) {
+void grpc_call_credentials_unref(grpc_call_credentials* creds) {
   if (creds == nullptr) return;
   if (gpr_unref(&creds->refcount)) {
     if (creds->vtable->destruct != nullptr) {
-      creds->vtable->destruct(exec_ctx, creds);
+      creds->vtable->destruct(creds);
     }
     gpr_free(creds);
   }
@@ -97,44 +94,42 @@ void grpc_call_credentials_unref(grpc_exec_ctx* exec_ctx,
 
 void grpc_call_credentials_release(grpc_call_credentials* creds) {
   GRPC_API_TRACE("grpc_call_credentials_release(creds=%p)", 1, (creds));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_call_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_call_credentials_unref(creds);
 }
 
 bool grpc_call_credentials_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_polling_entity* pollent, grpc_auth_metadata_context context,
-    grpc_credentials_mdelem_array* md_array, grpc_closure* on_request_metadata,
-    grpc_error** error) {
+    grpc_call_credentials* creds, grpc_polling_entity* pollent,
+    grpc_auth_metadata_context context, grpc_credentials_mdelem_array* md_array,
+    grpc_closure* on_request_metadata, grpc_error** error) {
   if (creds == nullptr || creds->vtable->get_request_metadata == nullptr) {
     return true;
   }
-  return creds->vtable->get_request_metadata(
-      exec_ctx, creds, pollent, context, md_array, on_request_metadata, error);
+  return creds->vtable->get_request_metadata(creds, pollent, context, md_array,
+                                             on_request_metadata, error);
 }
 
 void grpc_call_credentials_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* creds, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   if (creds == nullptr ||
       creds->vtable->cancel_get_request_metadata == nullptr) {
     return;
   }
-  creds->vtable->cancel_get_request_metadata(exec_ctx, creds, md_array, error);
+  creds->vtable->cancel_get_request_metadata(creds, md_array, error);
 }
 
 grpc_security_status grpc_channel_credentials_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* channel_creds,
-    const char* target, const grpc_channel_args* args,
-    grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
+    grpc_channel_credentials* channel_creds, const char* target,
+    const grpc_channel_args* args, grpc_channel_security_connector** sc,
+    grpc_channel_args** new_args) {
   *new_args = nullptr;
   if (channel_creds == nullptr) {
     return GRPC_SECURITY_ERROR;
   }
   GPR_ASSERT(channel_creds->vtable->create_security_connector != nullptr);
   return channel_creds->vtable->create_security_connector(
-      exec_ctx, channel_creds, nullptr, target, args, sc, new_args);
+      channel_creds, nullptr, target, args, sc, new_args);
 }
 
 grpc_channel_credentials*
@@ -149,8 +144,8 @@ grpc_channel_credentials_duplicate_without_call_credentials(
   }
 }
 
-static void credentials_pointer_arg_destroy(grpc_exec_ctx* exec_ctx, void* p) {
-  grpc_channel_credentials_unref(exec_ctx, (grpc_channel_credentials*)p);
+static void credentials_pointer_arg_destroy(void* p) {
+  grpc_channel_credentials_unref((grpc_channel_credentials*)p);
 }
 
 static void* credentials_pointer_arg_copy(void* p) {
@@ -200,12 +195,11 @@ grpc_server_credentials* grpc_server_credentials_ref(
   return creds;
 }
 
-void grpc_server_credentials_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_server_credentials* creds) {
+void grpc_server_credentials_unref(grpc_server_credentials* creds) {
   if (creds == nullptr) return;
   if (gpr_unref(&creds->refcount)) {
     if (creds->vtable->destruct != nullptr) {
-      creds->vtable->destruct(exec_ctx, creds);
+      creds->vtable->destruct(creds);
     }
     if (creds->processor.destroy != nullptr &&
         creds->processor.state != nullptr) {
@@ -217,19 +211,17 @@ void grpc_server_credentials_unref(grpc_exec_ctx* exec_ctx,
 
 void grpc_server_credentials_release(grpc_server_credentials* creds) {
   GRPC_API_TRACE("grpc_server_credentials_release(creds=%p)", 1, (creds));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_server_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_server_credentials_unref(creds);
 }
 
 grpc_security_status grpc_server_credentials_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_server_credentials* creds,
-    grpc_server_security_connector** sc) {
+    grpc_server_credentials* creds, grpc_server_security_connector** sc) {
   if (creds == nullptr || creds->vtable->create_security_connector == nullptr) {
     gpr_log(GPR_ERROR, "Server credentials cannot create security context.");
     return GRPC_SECURITY_ERROR;
   }
-  return creds->vtable->create_security_connector(exec_ctx, creds, sc);
+  return creds->vtable->create_security_connector(creds, sc);
 }
 
 void grpc_server_credentials_set_auth_metadata_processor(
@@ -247,9 +239,8 @@ void grpc_server_credentials_set_auth_metadata_processor(
   creds->processor = processor;
 }
 
-static void server_credentials_pointer_arg_destroy(grpc_exec_ctx* exec_ctx,
-                                                   void* p) {
-  grpc_server_credentials_unref(exec_ctx, (grpc_server_credentials*)p);
+static void server_credentials_pointer_arg_destroy(void* p) {
+  grpc_server_credentials_unref((grpc_server_credentials*)p);
 }
 
 static void* server_credentials_pointer_arg_copy(void* p) {
diff --git a/src/core/lib/security/credentials/credentials.h b/src/core/lib/security/credentials/credentials.h
index bc1bd11c77..4825b65720 100644
--- a/src/core/lib/security/credentials/credentials.h
+++ b/src/core/lib/security/credentials/credentials.h
@@ -88,13 +88,12 @@ void grpc_override_well_known_credentials_path_getter(
 #define GRPC_ARG_CHANNEL_CREDENTIALS "grpc.channel_credentials"
 
 typedef struct {
-  void (*destruct)(grpc_exec_ctx* exec_ctx, grpc_channel_credentials* c);
+  void (*destruct)(grpc_channel_credentials* c);
 
   grpc_security_status (*create_security_connector)(
-      grpc_exec_ctx* exec_ctx, grpc_channel_credentials* c,
-      grpc_call_credentials* call_creds, const char* target,
-      const grpc_channel_args* args, grpc_channel_security_connector** sc,
-      grpc_channel_args** new_args);
+      grpc_channel_credentials* c, grpc_call_credentials* call_creds,
+      const char* target, const grpc_channel_args* args,
+      grpc_channel_security_connector** sc, grpc_channel_args** new_args);
 
   grpc_channel_credentials* (*duplicate_without_call_credentials)(
       grpc_channel_credentials* c);
@@ -108,17 +107,16 @@ struct grpc_channel_credentials {
 
 grpc_channel_credentials* grpc_channel_credentials_ref(
     grpc_channel_credentials* creds);
-void grpc_channel_credentials_unref(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_credentials* creds);
+void grpc_channel_credentials_unref(grpc_channel_credentials* creds);
 
 /* Creates a security connector for the channel. May also create new channel
    args for the channel to be used in place of the passed in const args if
    returned non NULL. In that case the caller is responsible for destroying
    new_args after channel creation. */
 grpc_security_status grpc_channel_credentials_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* creds,
-    const char* target, const grpc_channel_args* args,
-    grpc_channel_security_connector** sc, grpc_channel_args** new_args);
+    grpc_channel_credentials* creds, const char* target,
+    const grpc_channel_args* args, grpc_channel_security_connector** sc,
+    grpc_channel_args** new_args);
 
 /* Creates a version of the channel credentials without any attached call
    credentials. This can be used in order to open a channel to a non-trusted
@@ -153,22 +151,19 @@ void grpc_credentials_mdelem_array_add(grpc_credentials_mdelem_array* list,
 void grpc_credentials_mdelem_array_append(grpc_credentials_mdelem_array* dst,
                                           grpc_credentials_mdelem_array* src);
 
-void grpc_credentials_mdelem_array_destroy(grpc_exec_ctx* exec_ctx,
-                                           grpc_credentials_mdelem_array* list);
+void grpc_credentials_mdelem_array_destroy(grpc_credentials_mdelem_array* list);
 
 /* --- grpc_call_credentials. --- */
 
 typedef struct {
-  void (*destruct)(grpc_exec_ctx* exec_ctx, grpc_call_credentials* c);
-  bool (*get_request_metadata)(grpc_exec_ctx* exec_ctx,
-                               grpc_call_credentials* c,
+  void (*destruct)(grpc_call_credentials* c);
+  bool (*get_request_metadata)(grpc_call_credentials* c,
                                grpc_polling_entity* pollent,
                                grpc_auth_metadata_context context,
                                grpc_credentials_mdelem_array* md_array,
                                grpc_closure* on_request_metadata,
                                grpc_error** error);
-  void (*cancel_get_request_metadata)(grpc_exec_ctx* exec_ctx,
-                                      grpc_call_credentials* c,
+  void (*cancel_get_request_metadata)(grpc_call_credentials* c,
                                       grpc_credentials_mdelem_array* md_array,
                                       grpc_error* error);
 } grpc_call_credentials_vtable;
@@ -180,39 +175,35 @@ struct grpc_call_credentials {
 };
 
 grpc_call_credentials* grpc_call_credentials_ref(grpc_call_credentials* creds);
-void grpc_call_credentials_unref(grpc_exec_ctx* exec_ctx,
-                                 grpc_call_credentials* creds);
+void grpc_call_credentials_unref(grpc_call_credentials* creds);
 
 /// Returns true if completed synchronously, in which case \a error will
 /// be set to indicate the result.  Otherwise, \a on_request_metadata will
 /// be invoked asynchronously when complete.  \a md_array will be populated
 /// with the resulting metadata once complete.
 bool grpc_call_credentials_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_polling_entity* pollent, grpc_auth_metadata_context context,
-    grpc_credentials_mdelem_array* md_array, grpc_closure* on_request_metadata,
-    grpc_error** error);
+    grpc_call_credentials* creds, grpc_polling_entity* pollent,
+    grpc_auth_metadata_context context, grpc_credentials_mdelem_array* md_array,
+    grpc_closure* on_request_metadata, grpc_error** error);
 
 /// Cancels a pending asynchronous operation started by
 /// grpc_call_credentials_get_request_metadata() with the corresponding
 /// value of \a md_array.
 void grpc_call_credentials_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* c,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error);
+    grpc_call_credentials* c, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error);
 
 /* Metadata-only credentials with the specified key and value where
    asynchronicity can be simulated for testing. */
 grpc_call_credentials* grpc_md_only_test_credentials_create(
-    grpc_exec_ctx* exec_ctx, const char* md_key, const char* md_value,
-    bool is_async);
+    const char* md_key, const char* md_value, bool is_async);
 
 /* --- grpc_server_credentials. --- */
 
 typedef struct {
-  void (*destruct)(grpc_exec_ctx* exec_ctx, grpc_server_credentials* c);
+  void (*destruct)(grpc_server_credentials* c);
   grpc_security_status (*create_security_connector)(
-      grpc_exec_ctx* exec_ctx, grpc_server_credentials* c,
-      grpc_server_security_connector** sc);
+      grpc_server_credentials* c, grpc_server_security_connector** sc);
 } grpc_server_credentials_vtable;
 
 struct grpc_server_credentials {
@@ -223,14 +214,12 @@ struct grpc_server_credentials {
 };
 
 grpc_security_status grpc_server_credentials_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_server_credentials* creds,
-    grpc_server_security_connector** sc);
+    grpc_server_credentials* creds, grpc_server_security_connector** sc);
 
 grpc_server_credentials* grpc_server_credentials_ref(
     grpc_server_credentials* creds);
 
-void grpc_server_credentials_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_server_credentials* creds);
+void grpc_server_credentials_unref(grpc_server_credentials* creds);
 
 #define GRPC_SERVER_CREDENTIALS_ARG "grpc.server_credentials"
 
@@ -250,6 +239,6 @@ grpc_credentials_metadata_request* grpc_credentials_metadata_request_create(
     grpc_call_credentials* creds);
 
 void grpc_credentials_metadata_request_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_credentials_metadata_request* r);
+    grpc_credentials_metadata_request* r);
 
 #endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_CREDENTIALS_H */
diff --git a/src/core/lib/security/credentials/credentials_metadata.cc b/src/core/lib/security/credentials/credentials_metadata.cc
index a3623fa1d6..9ceaf21139 100644
--- a/src/core/lib/security/credentials/credentials_metadata.cc
+++ b/src/core/lib/security/credentials/credentials_metadata.cc
@@ -52,9 +52,9 @@ void grpc_credentials_mdelem_array_append(grpc_credentials_mdelem_array* dst,
 }
 
 void grpc_credentials_mdelem_array_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_credentials_mdelem_array* list) {
+    grpc_credentials_mdelem_array* list) {
   for (size_t i = 0; i < list->size; ++i) {
-    GRPC_MDELEM_UNREF(exec_ctx, list->md[i]);
+    GRPC_MDELEM_UNREF(list->md[i]);
   }
   gpr_free(list->md);
 }
diff --git a/src/core/lib/security/credentials/fake/fake_credentials.cc b/src/core/lib/security/credentials/fake/fake_credentials.cc
index a535a317ee..99b1214951 100644
--- a/src/core/lib/security/credentials/fake/fake_credentials.cc
+++ b/src/core/lib/security/credentials/fake/fake_credentials.cc
@@ -34,10 +34,9 @@
   "grpc.fake_security.expected_targets"
 
 static grpc_security_status fake_transport_security_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* c,
-    grpc_call_credentials* call_creds, const char* target,
-    const grpc_channel_args* args, grpc_channel_security_connector** sc,
-    grpc_channel_args** new_args) {
+    grpc_channel_credentials* c, grpc_call_credentials* call_creds,
+    const char* target, const grpc_channel_args* args,
+    grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
   *sc =
       grpc_fake_channel_security_connector_create(c, call_creds, target, args);
   return GRPC_SECURITY_OK;
@@ -45,8 +44,7 @@ static grpc_security_status fake_transport_security_create_security_connector(
 
 static grpc_security_status
 fake_transport_security_server_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_server_credentials* c,
-    grpc_server_security_connector** sc) {
+    grpc_server_credentials* c, grpc_server_security_connector** sc) {
   *sc = grpc_fake_server_security_connector_create(c);
   return GRPC_SECURITY_OK;
 }
@@ -98,29 +96,27 @@ const char* grpc_fake_transport_get_expected_targets(
 
 /* -- Metadata-only test credentials. -- */
 
-static void md_only_test_destruct(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_credentials* creds) {
+static void md_only_test_destruct(grpc_call_credentials* creds) {
   grpc_md_only_test_credentials* c = (grpc_md_only_test_credentials*)creds;
-  GRPC_MDELEM_UNREF(exec_ctx, c->md);
+  GRPC_MDELEM_UNREF(c->md);
 }
 
 static bool md_only_test_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_polling_entity* pollent, grpc_auth_metadata_context context,
-    grpc_credentials_mdelem_array* md_array, grpc_closure* on_request_metadata,
-    grpc_error** error) {
+    grpc_call_credentials* creds, grpc_polling_entity* pollent,
+    grpc_auth_metadata_context context, grpc_credentials_mdelem_array* md_array,
+    grpc_closure* on_request_metadata, grpc_error** error) {
   grpc_md_only_test_credentials* c = (grpc_md_only_test_credentials*)creds;
   grpc_credentials_mdelem_array_add(md_array, c->md);
   if (c->is_async) {
-    GRPC_CLOSURE_SCHED(exec_ctx, on_request_metadata, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(on_request_metadata, GRPC_ERROR_NONE);
     return false;
   }
   return true;
 }
 
 static void md_only_test_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* c,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* c, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   GRPC_ERROR_UNREF(error);
 }
 
@@ -129,16 +125,14 @@ static grpc_call_credentials_vtable md_only_test_vtable = {
     md_only_test_cancel_get_request_metadata};
 
 grpc_call_credentials* grpc_md_only_test_credentials_create(
-    grpc_exec_ctx* exec_ctx, const char* md_key, const char* md_value,
-    bool is_async) {
+    const char* md_key, const char* md_value, bool is_async) {
   grpc_md_only_test_credentials* c = (grpc_md_only_test_credentials*)gpr_zalloc(
       sizeof(grpc_md_only_test_credentials));
   c->base.type = GRPC_CALL_CREDENTIALS_TYPE_OAUTH2;
   c->base.vtable = &md_only_test_vtable;
   gpr_ref_init(&c->base.refcount, 1);
-  c->md =
-      grpc_mdelem_from_slices(exec_ctx, grpc_slice_from_copied_string(md_key),
-                              grpc_slice_from_copied_string(md_value));
+  c->md = grpc_mdelem_from_slices(grpc_slice_from_copied_string(md_key),
+                                  grpc_slice_from_copied_string(md_value));
   c->is_async = is_async;
   return &c->base;
 }
diff --git a/src/core/lib/security/credentials/google_default/credentials_generic.cc b/src/core/lib/security/credentials/google_default/credentials_generic.cc
index 58ee080cf3..af103f5dc5 100644
--- a/src/core/lib/security/credentials/google_default/credentials_generic.cc
+++ b/src/core/lib/security/credentials/google_default/credentials_generic.cc
@@ -29,7 +29,7 @@ char* grpc_get_well_known_google_credentials_file_path_impl(void) {
   char* result = nullptr;
   char* base = gpr_getenv(GRPC_GOOGLE_CREDENTIALS_PATH_ENV_VAR);
   if (base == nullptr) {
-    gpr_log(GPR_ERROR, "Could not get " GRPC_GOOGLE_CREDENTIALS_ENV_VAR
+    gpr_log(GPR_ERROR, "Could not get " GRPC_GOOGLE_CREDENTIALS_PATH_ENV_VAR
                        " environment variable.");
     return nullptr;
   }
diff --git a/src/core/lib/security/credentials/google_default/google_default_credentials.cc b/src/core/lib/security/credentials/google_default/google_default_credentials.cc
index f586c7b604..03d52850d9 100644
--- a/src/core/lib/security/credentials/google_default/google_default_credentials.cc
+++ b/src/core/lib/security/credentials/google_default/google_default_credentials.cc
@@ -58,8 +58,7 @@ typedef struct {
   grpc_http_response response;
 } compute_engine_detector;
 
-static void on_compute_engine_detection_http_response(grpc_exec_ctx* exec_ctx,
-                                                      void* user_data,
+static void on_compute_engine_detection_http_response(void* user_data,
                                                       grpc_error* error) {
   compute_engine_detector* detector = (compute_engine_detector*)user_data;
   if (error == GRPC_ERROR_NONE && detector->response.status == 200 &&
@@ -80,16 +79,16 @@ static void on_compute_engine_detection_http_response(grpc_exec_ctx* exec_ctx,
   detector->is_done = 1;
   GRPC_LOG_IF_ERROR(
       "Pollset kick",
-      grpc_pollset_kick(
-          exec_ctx, grpc_polling_entity_pollset(&detector->pollent), nullptr));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&detector->pollent),
+                        nullptr));
   gpr_mu_unlock(g_polling_mu);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p, grpc_error* e) {
-  grpc_pollset_destroy(exec_ctx, (grpc_pollset*)p);
+static void destroy_pollset(void* p, grpc_error* e) {
+  grpc_pollset_destroy((grpc_pollset*)p);
 }
 
-static int is_stack_running_on_compute_engine(grpc_exec_ctx* exec_ctx) {
+static int is_stack_running_on_compute_engine() {
   compute_engine_detector detector;
   grpc_httpcli_request request;
   grpc_httpcli_context context;
@@ -115,14 +114,14 @@ static int is_stack_running_on_compute_engine(grpc_exec_ctx* exec_ctx) {
   grpc_resource_quota* resource_quota =
       grpc_resource_quota_create("google_default_credentials");
   grpc_httpcli_get(
-      exec_ctx, &context, &detector.pollent, resource_quota, &request,
-      grpc_exec_ctx_now(exec_ctx) + max_detection_delay,
+      &context, &detector.pollent, resource_quota, &request,
+      grpc_core::ExecCtx::Get()->Now() + max_detection_delay,
       GRPC_CLOSURE_CREATE(on_compute_engine_detection_http_response, &detector,
                           grpc_schedule_on_exec_ctx),
       &detector.response);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
 
-  grpc_exec_ctx_flush(exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Block until we get the response. This is not ideal but this should only be
      called once for the lifetime of the process by the default credentials. */
@@ -131,8 +130,7 @@ static int is_stack_running_on_compute_engine(grpc_exec_ctx* exec_ctx) {
     grpc_pollset_worker* worker = nullptr;
     if (!GRPC_LOG_IF_ERROR(
             "pollset_work",
-            grpc_pollset_work(exec_ctx,
-                              grpc_polling_entity_pollset(&detector.pollent),
+            grpc_pollset_work(grpc_polling_entity_pollset(&detector.pollent),
                               &worker, GRPC_MILLIS_INF_FUTURE))) {
       detector.is_done = 1;
       detector.success = 0;
@@ -140,15 +138,14 @@ static int is_stack_running_on_compute_engine(grpc_exec_ctx* exec_ctx) {
   }
   gpr_mu_unlock(g_polling_mu);
 
-  grpc_httpcli_context_destroy(exec_ctx, &context);
+  grpc_httpcli_context_destroy(&context);
   GRPC_CLOSURE_INIT(&destroy_closure, destroy_pollset,
                     grpc_polling_entity_pollset(&detector.pollent),
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(exec_ctx,
-                        grpc_polling_entity_pollset(&detector.pollent),
+  grpc_pollset_shutdown(grpc_polling_entity_pollset(&detector.pollent),
                         &destroy_closure);
   g_polling_mu = nullptr;
-  grpc_exec_ctx_flush(exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   gpr_free(grpc_polling_entity_pollset(&detector.pollent));
   grpc_http_response_destroy(&detector.response);
@@ -158,7 +155,7 @@ static int is_stack_running_on_compute_engine(grpc_exec_ctx* exec_ctx) {
 
 /* Takes ownership of creds_path if not NULL. */
 static grpc_error* create_default_creds_from_path(
-    grpc_exec_ctx* exec_ctx, char* creds_path, grpc_call_credentials** creds) {
+    char* creds_path, grpc_call_credentials** creds) {
   grpc_json* json = nullptr;
   grpc_auth_json_key key;
   grpc_auth_refresh_token token;
@@ -187,7 +184,7 @@ static grpc_error* create_default_creds_from_path(
   if (grpc_auth_json_key_is_valid(&key)) {
     result =
         grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
-            exec_ctx, key, grpc_max_auth_token_lifetime());
+            key, grpc_max_auth_token_lifetime());
     if (result == nullptr) {
       error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
           "grpc_service_account_jwt_access_credentials_create_from_auth_json_"
@@ -212,7 +209,7 @@ static grpc_error* create_default_creds_from_path(
 end:
   GPR_ASSERT((result == nullptr) + (error == GRPC_ERROR_NONE) == 1);
   if (creds_path != nullptr) gpr_free(creds_path);
-  grpc_slice_unref_internal(exec_ctx, creds_data);
+  grpc_slice_unref_internal(creds_data);
   if (json != nullptr) grpc_json_destroy(json);
   *creds = result;
   return error;
@@ -224,7 +221,7 @@ grpc_channel_credentials* grpc_google_default_credentials_create(void) {
   grpc_error* error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
       "Failed to create Google credentials");
   grpc_error* err;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_API_TRACE("grpc_google_default_credentials_create(void)", 0, ());
 
@@ -239,22 +236,20 @@ grpc_channel_credentials* grpc_google_default_credentials_create(void) {
 
   /* First, try the environment variable. */
   err = create_default_creds_from_path(
-      &exec_ctx, gpr_getenv(GRPC_GOOGLE_CREDENTIALS_ENV_VAR), &call_creds);
+      gpr_getenv(GRPC_GOOGLE_CREDENTIALS_ENV_VAR), &call_creds);
   if (err == GRPC_ERROR_NONE) goto end;
   error = grpc_error_add_child(error, err);
 
   /* Then the well-known file. */
   err = create_default_creds_from_path(
-      &exec_ctx, grpc_get_well_known_google_credentials_file_path(),
-      &call_creds);
+      grpc_get_well_known_google_credentials_file_path(), &call_creds);
   if (err == GRPC_ERROR_NONE) goto end;
   error = grpc_error_add_child(error, err);
 
   /* At last try to see if we're on compute engine (do the detection only once
      since it requires a network test). */
   if (!compute_engine_detection_done) {
-    int need_compute_engine_creds =
-        is_stack_running_on_compute_engine(&exec_ctx);
+    int need_compute_engine_creds = is_stack_running_on_compute_engine();
     compute_engine_detection_done = 1;
     if (need_compute_engine_creds) {
       call_creds = grpc_google_compute_engine_credentials_create(nullptr);
@@ -278,8 +273,8 @@ end:
           grpc_composite_channel_credentials_create(ssl_creds, call_creds,
                                                     nullptr));
       GPR_ASSERT(default_credentials != nullptr);
-      grpc_channel_credentials_unref(&exec_ctx, ssl_creds);
-      grpc_call_credentials_unref(&exec_ctx, call_creds);
+      grpc_channel_credentials_unref(ssl_creds);
+      grpc_call_credentials_unref(call_creds);
       result = default_credentials;
     } else {
       gpr_log(GPR_ERROR, "Could not create google default credentials.");
@@ -291,21 +286,20 @@ end:
   } else {
     GRPC_ERROR_UNREF(error);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return result;
 }
 
 void grpc_flush_cached_google_default_credentials(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_once_init(&g_once, init_default_credentials);
   gpr_mu_lock(&g_state_mu);
   if (default_credentials != nullptr) {
-    grpc_channel_credentials_unref(&exec_ctx, default_credentials);
+    grpc_channel_credentials_unref(default_credentials);
     default_credentials = nullptr;
   }
   compute_engine_detection_done = 0;
   gpr_mu_unlock(&g_state_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 /* -- Well known credentials path. -- */
diff --git a/src/core/lib/security/credentials/iam/iam_credentials.cc b/src/core/lib/security/credentials/iam/iam_credentials.cc
index 1741bf3068..75acb2a58e 100644
--- a/src/core/lib/security/credentials/iam/iam_credentials.cc
+++ b/src/core/lib/security/credentials/iam/iam_credentials.cc
@@ -27,14 +27,12 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
 
-static void iam_destruct(grpc_exec_ctx* exec_ctx,
-                         grpc_call_credentials* creds) {
+static void iam_destruct(grpc_call_credentials* creds) {
   grpc_google_iam_credentials* c = (grpc_google_iam_credentials*)creds;
-  grpc_credentials_mdelem_array_destroy(exec_ctx, &c->md_array);
+  grpc_credentials_mdelem_array_destroy(&c->md_array);
 }
 
-static bool iam_get_request_metadata(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_credentials* creds,
+static bool iam_get_request_metadata(grpc_call_credentials* creds,
                                      grpc_polling_entity* pollent,
                                      grpc_auth_metadata_context context,
                                      grpc_credentials_mdelem_array* md_array,
@@ -46,8 +44,8 @@ static bool iam_get_request_metadata(grpc_exec_ctx* exec_ctx,
 }
 
 static void iam_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* c,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* c, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   GRPC_ERROR_UNREF(error);
 }
 
@@ -56,7 +54,7 @@ static grpc_call_credentials_vtable iam_vtable = {
 
 grpc_call_credentials* grpc_google_iam_credentials_create(
     const char* token, const char* authority_selector, void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_API_TRACE(
       "grpc_iam_credentials_create(token=%s, authority_selector=%s, "
       "reserved=%p)",
@@ -70,17 +68,15 @@ grpc_call_credentials* grpc_google_iam_credentials_create(
   c->base.vtable = &iam_vtable;
   gpr_ref_init(&c->base.refcount, 1);
   grpc_mdelem md = grpc_mdelem_from_slices(
-      &exec_ctx,
       grpc_slice_from_static_string(GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY),
       grpc_slice_from_copied_string(token));
   grpc_credentials_mdelem_array_add(&c->md_array, md);
-  GRPC_MDELEM_UNREF(&exec_ctx, md);
+  GRPC_MDELEM_UNREF(md);
   md = grpc_mdelem_from_slices(
-      &exec_ctx,
       grpc_slice_from_static_string(GRPC_IAM_AUTHORITY_SELECTOR_METADATA_KEY),
       grpc_slice_from_copied_string(authority_selector));
   grpc_credentials_mdelem_array_add(&c->md_array, md);
-  GRPC_MDELEM_UNREF(&exec_ctx, md);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(md);
+
   return &c->base;
 }
diff --git a/src/core/lib/security/credentials/jwt/jwt_credentials.cc b/src/core/lib/security/credentials/jwt/jwt_credentials.cc
index 77163c0cc1..2404e860e4 100644
--- a/src/core/lib/security/credentials/jwt/jwt_credentials.cc
+++ b/src/core/lib/security/credentials/jwt/jwt_credentials.cc
@@ -30,9 +30,8 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
 
-static void jwt_reset_cache(grpc_exec_ctx* exec_ctx,
-                            grpc_service_account_jwt_access_credentials* c) {
-  GRPC_MDELEM_UNREF(exec_ctx, c->cached.jwt_md);
+static void jwt_reset_cache(grpc_service_account_jwt_access_credentials* c) {
+  GRPC_MDELEM_UNREF(c->cached.jwt_md);
   c->cached.jwt_md = GRPC_MDNULL;
   if (c->cached.service_url != nullptr) {
     gpr_free(c->cached.service_url);
@@ -41,17 +40,15 @@ static void jwt_reset_cache(grpc_exec_ctx* exec_ctx,
   c->cached.jwt_expiration = gpr_inf_past(GPR_CLOCK_REALTIME);
 }
 
-static void jwt_destruct(grpc_exec_ctx* exec_ctx,
-                         grpc_call_credentials* creds) {
+static void jwt_destruct(grpc_call_credentials* creds) {
   grpc_service_account_jwt_access_credentials* c =
       (grpc_service_account_jwt_access_credentials*)creds;
   grpc_auth_json_key_destruct(&c->key);
-  jwt_reset_cache(exec_ctx, c);
+  jwt_reset_cache(c);
   gpr_mu_destroy(&c->cache_mu);
 }
 
-static bool jwt_get_request_metadata(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_credentials* creds,
+static bool jwt_get_request_metadata(grpc_call_credentials* creds,
                                      grpc_polling_entity* pollent,
                                      grpc_auth_metadata_context context,
                                      grpc_credentials_mdelem_array* md_array,
@@ -81,7 +78,7 @@ static bool jwt_get_request_metadata(grpc_exec_ctx* exec_ctx,
     char* jwt = nullptr;
     /* Generate a new jwt. */
     gpr_mu_lock(&c->cache_mu);
-    jwt_reset_cache(exec_ctx, c);
+    jwt_reset_cache(c);
     jwt = grpc_jwt_encode_and_sign(&c->key, context.service_url,
                                    c->jwt_lifetime, nullptr);
     if (jwt != nullptr) {
@@ -92,7 +89,6 @@ static bool jwt_get_request_metadata(grpc_exec_ctx* exec_ctx,
           gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), c->jwt_lifetime);
       c->cached.service_url = gpr_strdup(context.service_url);
       c->cached.jwt_md = grpc_mdelem_from_slices(
-          exec_ctx,
           grpc_slice_from_static_string(GRPC_AUTHORIZATION_METADATA_KEY),
           grpc_slice_from_copied_string(md_value));
       gpr_free(md_value);
@@ -103,7 +99,7 @@ static bool jwt_get_request_metadata(grpc_exec_ctx* exec_ctx,
 
   if (!GRPC_MDISNULL(jwt_md)) {
     grpc_credentials_mdelem_array_add(md_array, jwt_md);
-    GRPC_MDELEM_UNREF(exec_ctx, jwt_md);
+    GRPC_MDELEM_UNREF(jwt_md);
   } else {
     *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Could not generate JWT.");
   }
@@ -111,8 +107,8 @@ static bool jwt_get_request_metadata(grpc_exec_ctx* exec_ctx,
 }
 
 static void jwt_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* c,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* c, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   GRPC_ERROR_UNREF(error);
 }
 
@@ -121,8 +117,7 @@ static grpc_call_credentials_vtable jwt_vtable = {
 
 grpc_call_credentials*
 grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
-    grpc_exec_ctx* exec_ctx, grpc_auth_json_key key,
-    gpr_timespec token_lifetime) {
+    grpc_auth_json_key key, gpr_timespec token_lifetime) {
   grpc_service_account_jwt_access_credentials* c;
   if (!grpc_auth_json_key_is_valid(&key)) {
     gpr_log(GPR_ERROR, "Invalid input for jwt credentials creation");
@@ -143,7 +138,7 @@ grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
   }
   c->jwt_lifetime = token_lifetime;
   gpr_mu_init(&c->cache_mu);
-  jwt_reset_cache(exec_ctx, c);
+  jwt_reset_cache(c);
   return &c->base;
 }
 
@@ -186,11 +181,10 @@ grpc_call_credentials* grpc_service_account_jwt_access_credentials_create(
     gpr_free(clean_json);
   }
   GPR_ASSERT(reserved == nullptr);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_call_credentials* creds =
       grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
-          &exec_ctx, grpc_auth_json_key_create_from_string(json_key),
-          token_lifetime);
-  grpc_exec_ctx_finish(&exec_ctx);
+          grpc_auth_json_key_create_from_string(json_key), token_lifetime);
+
   return creds;
 }
diff --git a/src/core/lib/security/credentials/jwt/jwt_credentials.h b/src/core/lib/security/credentials/jwt/jwt_credentials.h
index 85f068aac8..f58a8b67ba 100644
--- a/src/core/lib/security/credentials/jwt/jwt_credentials.h
+++ b/src/core/lib/security/credentials/jwt/jwt_credentials.h
@@ -42,7 +42,6 @@ typedef struct {
 // Takes ownership of the key.
 grpc_call_credentials*
 grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
-    grpc_exec_ctx* exec_ctx, grpc_auth_json_key key,
-    gpr_timespec token_lifetime);
+    grpc_auth_json_key key, gpr_timespec token_lifetime);
 
 #endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_JWT_JWT_CREDENTIALS_H */
diff --git a/src/core/lib/security/credentials/jwt/jwt_verifier.cc b/src/core/lib/security/credentials/jwt/jwt_verifier.cc
index 3709b83c4e..39339f07d7 100644
--- a/src/core/lib/security/credentials/jwt/jwt_verifier.cc
+++ b/src/core/lib/security/credentials/jwt/jwt_verifier.cc
@@ -74,12 +74,11 @@ static const EVP_MD* evp_md_from_alg(const char* alg) {
   }
 }
 
-static grpc_json* parse_json_part_from_jwt(grpc_exec_ctx* exec_ctx,
-                                           const char* str, size_t len,
+static grpc_json* parse_json_part_from_jwt(const char* str, size_t len,
                                            grpc_slice* buffer) {
   grpc_json* json;
 
-  *buffer = grpc_base64_decode_with_len(exec_ctx, str, len, 1);
+  *buffer = grpc_base64_decode_with_len(str, len, 1);
   if (GRPC_SLICE_IS_EMPTY(*buffer)) {
     gpr_log(GPR_ERROR, "Invalid base64.");
     return nullptr;
@@ -87,7 +86,7 @@ static grpc_json* parse_json_part_from_jwt(grpc_exec_ctx* exec_ctx,
   json = grpc_json_parse_string_with_len((char*)GRPC_SLICE_START_PTR(*buffer),
                                          GRPC_SLICE_LENGTH(*buffer));
   if (json == nullptr) {
-    grpc_slice_unref_internal(exec_ctx, *buffer);
+    grpc_slice_unref_internal(*buffer);
     gpr_log(GPR_ERROR, "JSON parsing error.");
   }
   return json;
@@ -123,14 +122,13 @@ typedef struct {
   grpc_slice buffer;
 } jose_header;
 
-static void jose_header_destroy(grpc_exec_ctx* exec_ctx, jose_header* h) {
-  grpc_slice_unref_internal(exec_ctx, h->buffer);
+static void jose_header_destroy(jose_header* h) {
+  grpc_slice_unref_internal(h->buffer);
   gpr_free(h);
 }
 
 /* Takes ownership of json and buffer. */
-static jose_header* jose_header_from_json(grpc_exec_ctx* exec_ctx,
-                                          grpc_json* json, grpc_slice buffer) {
+static jose_header* jose_header_from_json(grpc_json* json, grpc_slice buffer) {
   grpc_json* cur;
   jose_header* h = (jose_header*)gpr_zalloc(sizeof(jose_header));
   h->buffer = buffer;
@@ -164,7 +162,7 @@ static jose_header* jose_header_from_json(grpc_exec_ctx* exec_ctx,
 
 error:
   grpc_json_destroy(json);
-  jose_header_destroy(exec_ctx, h);
+  jose_header_destroy(h);
   return nullptr;
 }
 
@@ -184,9 +182,9 @@ struct grpc_jwt_claims {
   grpc_slice buffer;
 };
 
-void grpc_jwt_claims_destroy(grpc_exec_ctx* exec_ctx, grpc_jwt_claims* claims) {
+void grpc_jwt_claims_destroy(grpc_jwt_claims* claims) {
   grpc_json_destroy(claims->json);
-  grpc_slice_unref_internal(exec_ctx, claims->buffer);
+  grpc_slice_unref_internal(claims->buffer);
   gpr_free(claims);
 }
 
@@ -231,8 +229,7 @@ gpr_timespec grpc_jwt_claims_not_before(const grpc_jwt_claims* claims) {
 }
 
 /* Takes ownership of json and buffer even in case of failure. */
-grpc_jwt_claims* grpc_jwt_claims_from_json(grpc_exec_ctx* exec_ctx,
-                                           grpc_json* json, grpc_slice buffer) {
+grpc_jwt_claims* grpc_jwt_claims_from_json(grpc_json* json, grpc_slice buffer) {
   grpc_json* cur;
   grpc_jwt_claims* claims =
       (grpc_jwt_claims*)gpr_malloc(sizeof(grpc_jwt_claims));
@@ -274,7 +271,7 @@ grpc_jwt_claims* grpc_jwt_claims_from_json(grpc_exec_ctx* exec_ctx,
   return claims;
 
 error:
-  grpc_jwt_claims_destroy(exec_ctx, claims);
+  grpc_jwt_claims_destroy(claims);
   return nullptr;
 }
 
@@ -350,7 +347,7 @@ static verifier_cb_ctx* verifier_cb_ctx_create(
     grpc_jwt_claims* claims, const char* audience, grpc_slice signature,
     const char* signed_jwt, size_t signed_jwt_len, void* user_data,
     grpc_jwt_verification_done_cb cb) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   verifier_cb_ctx* ctx = (verifier_cb_ctx*)gpr_zalloc(sizeof(verifier_cb_ctx));
   ctx->verifier = verifier;
   ctx->pollent = grpc_polling_entity_create_from_pollset(pollset);
@@ -361,16 +358,16 @@ static verifier_cb_ctx* verifier_cb_ctx_create(
   ctx->signed_data = grpc_slice_from_copied_buffer(signed_jwt, signed_jwt_len);
   ctx->user_data = user_data;
   ctx->user_cb = cb;
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return ctx;
 }
 
-void verifier_cb_ctx_destroy(grpc_exec_ctx* exec_ctx, verifier_cb_ctx* ctx) {
+void verifier_cb_ctx_destroy(verifier_cb_ctx* ctx) {
   if (ctx->audience != nullptr) gpr_free(ctx->audience);
-  if (ctx->claims != nullptr) grpc_jwt_claims_destroy(exec_ctx, ctx->claims);
-  grpc_slice_unref_internal(exec_ctx, ctx->signature);
-  grpc_slice_unref_internal(exec_ctx, ctx->signed_data);
-  jose_header_destroy(exec_ctx, ctx->header);
+  if (ctx->claims != nullptr) grpc_jwt_claims_destroy(ctx->claims);
+  grpc_slice_unref_internal(ctx->signature);
+  grpc_slice_unref_internal(ctx->signed_data);
+  jose_header_destroy(ctx->header);
   for (size_t i = 0; i < HTTP_RESPONSE_COUNT; i++) {
     grpc_http_response_destroy(&ctx->responses[i]);
   }
@@ -450,19 +447,19 @@ end:
   return result;
 }
 
-static BIGNUM* bignum_from_base64(grpc_exec_ctx* exec_ctx, const char* b64) {
+static BIGNUM* bignum_from_base64(const char* b64) {
   BIGNUM* result = nullptr;
   grpc_slice bin;
 
   if (b64 == nullptr) return nullptr;
-  bin = grpc_base64_decode(exec_ctx, b64, 1);
+  bin = grpc_base64_decode(b64, 1);
   if (GRPC_SLICE_IS_EMPTY(bin)) {
     gpr_log(GPR_ERROR, "Invalid base64 for big num.");
     return nullptr;
   }
   result = BN_bin2bn(GRPC_SLICE_START_PTR(bin),
                      TSI_SIZE_AS_SIZE(GRPC_SLICE_LENGTH(bin)), nullptr);
-  grpc_slice_unref_internal(exec_ctx, bin);
+  grpc_slice_unref_internal(bin);
   return result;
 }
 
@@ -495,8 +492,7 @@ static int RSA_set0_key(RSA* r, BIGNUM* n, BIGNUM* e, BIGNUM* d) {
 }
 #endif  // OPENSSL_VERSION_NUMBER < 0x10100000L
 
-static EVP_PKEY* pkey_from_jwk(grpc_exec_ctx* exec_ctx, const grpc_json* json,
-                               const char* kty) {
+static EVP_PKEY* pkey_from_jwk(const grpc_json* json, const char* kty) {
   const grpc_json* key_prop;
   RSA* rsa = nullptr;
   EVP_PKEY* result = nullptr;
@@ -515,12 +511,10 @@ static EVP_PKEY* pkey_from_jwk(grpc_exec_ctx* exec_ctx, const grpc_json* json,
   }
   for (key_prop = json->child; key_prop != nullptr; key_prop = key_prop->next) {
     if (strcmp(key_prop->key, "n") == 0) {
-      tmp_n =
-          bignum_from_base64(exec_ctx, validate_string_field(key_prop, "n"));
+      tmp_n = bignum_from_base64(validate_string_field(key_prop, "n"));
       if (tmp_n == nullptr) goto end;
     } else if (strcmp(key_prop->key, "e") == 0) {
-      tmp_e =
-          bignum_from_base64(exec_ctx, validate_string_field(key_prop, "e"));
+      tmp_e = bignum_from_base64(validate_string_field(key_prop, "e"));
       if (tmp_e == nullptr) goto end;
     }
   }
@@ -545,8 +539,7 @@ end:
   return result;
 }
 
-static EVP_PKEY* find_verification_key(grpc_exec_ctx* exec_ctx,
-                                       const grpc_json* json,
+static EVP_PKEY* find_verification_key(const grpc_json* json,
                                        const char* header_alg,
                                        const char* header_kid) {
   const grpc_json* jkey;
@@ -591,7 +584,7 @@ static EVP_PKEY* find_verification_key(grpc_exec_ctx* exec_ctx,
     }
     if (alg != nullptr && kid != nullptr && kty != nullptr &&
         strcmp(kid, header_kid) == 0 && strcmp(alg, header_alg) == 0) {
-      return pkey_from_jwk(exec_ctx, jkey, kty);
+      return pkey_from_jwk(jkey, kty);
     }
   }
   gpr_log(GPR_ERROR,
@@ -632,8 +625,7 @@ end:
   return result;
 }
 
-static void on_keys_retrieved(grpc_exec_ctx* exec_ctx, void* user_data,
-                              grpc_error* error) {
+static void on_keys_retrieved(void* user_data, grpc_error* error) {
   verifier_cb_ctx* ctx = (verifier_cb_ctx*)user_data;
   grpc_json* json = json_from_http(&ctx->responses[HTTP_RESPONSE_KEYS]);
   EVP_PKEY* verification_key = nullptr;
@@ -645,7 +637,7 @@ static void on_keys_retrieved(grpc_exec_ctx* exec_ctx, void* user_data,
     goto end;
   }
   verification_key =
-      find_verification_key(exec_ctx, json, ctx->header->alg, ctx->header->kid);
+      find_verification_key(json, ctx->header->alg, ctx->header->kid);
   if (verification_key == nullptr) {
     gpr_log(GPR_ERROR, "Could not find verification key with kid %s.",
             ctx->header->kid);
@@ -669,12 +661,11 @@ static void on_keys_retrieved(grpc_exec_ctx* exec_ctx, void* user_data,
 end:
   if (json != nullptr) grpc_json_destroy(json);
   EVP_PKEY_free(verification_key);
-  ctx->user_cb(exec_ctx, ctx->user_data, status, claims);
-  verifier_cb_ctx_destroy(exec_ctx, ctx);
+  ctx->user_cb(ctx->user_data, status, claims);
+  verifier_cb_ctx_destroy(ctx);
 }
 
-static void on_openid_config_retrieved(grpc_exec_ctx* exec_ctx, void* user_data,
-                                       grpc_error* error) {
+static void on_openid_config_retrieved(void* user_data, grpc_error* error) {
   const grpc_json* cur;
   verifier_cb_ctx* ctx = (verifier_cb_ctx*)user_data;
   const grpc_http_response* response = &ctx->responses[HTTP_RESPONSE_OPENID];
@@ -711,20 +702,19 @@ static void on_openid_config_retrieved(grpc_exec_ctx* exec_ctx, void* user_data,
      extreme memory pressure. */
   resource_quota = grpc_resource_quota_create("jwt_verifier");
   grpc_httpcli_get(
-      exec_ctx, &ctx->verifier->http_ctx, &ctx->pollent, resource_quota, &req,
-      grpc_exec_ctx_now(exec_ctx) + grpc_jwt_verifier_max_delay,
+      &ctx->verifier->http_ctx, &ctx->pollent, resource_quota, &req,
+      grpc_core::ExecCtx::Get()->Now() + grpc_jwt_verifier_max_delay,
       GRPC_CLOSURE_CREATE(on_keys_retrieved, ctx, grpc_schedule_on_exec_ctx),
       &ctx->responses[HTTP_RESPONSE_KEYS]);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
   grpc_json_destroy(json);
   gpr_free(req.host);
   return;
 
 error:
   if (json != nullptr) grpc_json_destroy(json);
-  ctx->user_cb(exec_ctx, ctx->user_data, GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR,
-               nullptr);
-  verifier_cb_ctx_destroy(exec_ctx, ctx);
+  ctx->user_cb(ctx->user_data, GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR, nullptr);
+  verifier_cb_ctx_destroy(ctx);
 }
 
 static email_key_mapping* verifier_get_mapping(grpc_jwt_verifier* v,
@@ -772,8 +762,7 @@ const char* grpc_jwt_issuer_email_domain(const char* issuer) {
 }
 
 /* Takes ownership of ctx. */
-static void retrieve_key_and_verify(grpc_exec_ctx* exec_ctx,
-                                    verifier_cb_ctx* ctx) {
+static void retrieve_key_and_verify(verifier_cb_ctx* ctx) {
   const char* email_domain;
   grpc_closure* http_cb;
   char* path_prefix = nullptr;
@@ -840,23 +829,21 @@ static void retrieve_key_and_verify(grpc_exec_ctx* exec_ctx,
      channel. This would allow us to cancel an authentication query when under
      extreme memory pressure. */
   resource_quota = grpc_resource_quota_create("jwt_verifier");
-  grpc_httpcli_get(exec_ctx, &ctx->verifier->http_ctx, &ctx->pollent,
-                   resource_quota, &req,
-                   grpc_exec_ctx_now(exec_ctx) + grpc_jwt_verifier_max_delay,
-                   http_cb, &ctx->responses[rsp_idx]);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_httpcli_get(
+      &ctx->verifier->http_ctx, &ctx->pollent, resource_quota, &req,
+      grpc_core::ExecCtx::Get()->Now() + grpc_jwt_verifier_max_delay, http_cb,
+      &ctx->responses[rsp_idx]);
+  grpc_resource_quota_unref_internal(resource_quota);
   gpr_free(req.host);
   gpr_free(req.http.path);
   return;
 
 error:
-  ctx->user_cb(exec_ctx, ctx->user_data, GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR,
-               nullptr);
-  verifier_cb_ctx_destroy(exec_ctx, ctx);
+  ctx->user_cb(ctx->user_data, GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR, nullptr);
+  verifier_cb_ctx_destroy(ctx);
 }
 
-void grpc_jwt_verifier_verify(grpc_exec_ctx* exec_ctx,
-                              grpc_jwt_verifier* verifier,
+void grpc_jwt_verifier_verify(grpc_jwt_verifier* verifier,
                               grpc_pollset* pollset, const char* jwt,
                               const char* audience,
                               grpc_jwt_verification_done_cb cb,
@@ -875,35 +862,32 @@ void grpc_jwt_verifier_verify(grpc_exec_ctx* exec_ctx,
              cb != nullptr);
   dot = strchr(cur, '.');
   if (dot == nullptr) goto error;
-  json = parse_json_part_from_jwt(exec_ctx, cur, (size_t)(dot - cur),
-                                  &header_buffer);
+  json = parse_json_part_from_jwt(cur, (size_t)(dot - cur), &header_buffer);
   if (json == nullptr) goto error;
-  header = jose_header_from_json(exec_ctx, json, header_buffer);
+  header = jose_header_from_json(json, header_buffer);
   if (header == nullptr) goto error;
 
   cur = dot + 1;
   dot = strchr(cur, '.');
   if (dot == nullptr) goto error;
-  json = parse_json_part_from_jwt(exec_ctx, cur, (size_t)(dot - cur),
-                                  &claims_buffer);
+  json = parse_json_part_from_jwt(cur, (size_t)(dot - cur), &claims_buffer);
   if (json == nullptr) goto error;
-  claims = grpc_jwt_claims_from_json(exec_ctx, json, claims_buffer);
+  claims = grpc_jwt_claims_from_json(json, claims_buffer);
   if (claims == nullptr) goto error;
 
   signed_jwt_len = (size_t)(dot - jwt);
   cur = dot + 1;
-  signature = grpc_base64_decode(exec_ctx, cur, 1);
+  signature = grpc_base64_decode(cur, 1);
   if (GRPC_SLICE_IS_EMPTY(signature)) goto error;
   retrieve_key_and_verify(
-      exec_ctx,
       verifier_cb_ctx_create(verifier, pollset, header, claims, audience,
                              signature, jwt, signed_jwt_len, user_data, cb));
   return;
 
 error:
-  if (header != nullptr) jose_header_destroy(exec_ctx, header);
-  if (claims != nullptr) grpc_jwt_claims_destroy(exec_ctx, claims);
-  cb(exec_ctx, user_data, GRPC_JWT_VERIFIER_BAD_FORMAT, nullptr);
+  if (header != nullptr) jose_header_destroy(header);
+  if (claims != nullptr) grpc_jwt_claims_destroy(claims);
+  cb(user_data, GRPC_JWT_VERIFIER_BAD_FORMAT, nullptr);
 }
 
 grpc_jwt_verifier* grpc_jwt_verifier_create(
@@ -930,10 +914,10 @@ grpc_jwt_verifier* grpc_jwt_verifier_create(
   return v;
 }
 
-void grpc_jwt_verifier_destroy(grpc_exec_ctx* exec_ctx, grpc_jwt_verifier* v) {
+void grpc_jwt_verifier_destroy(grpc_jwt_verifier* v) {
   size_t i;
   if (v == nullptr) return;
-  grpc_httpcli_context_destroy(exec_ctx, &v->http_ctx);
+  grpc_httpcli_context_destroy(&v->http_ctx);
   if (v->mappings != nullptr) {
     for (i = 0; i < v->num_mappings; i++) {
       gpr_free(v->mappings[i].email_domain);
diff --git a/src/core/lib/security/credentials/jwt/jwt_verifier.h b/src/core/lib/security/credentials/jwt/jwt_verifier.h
index 2aacd497c7..b3805e75cd 100644
--- a/src/core/lib/security/credentials/jwt/jwt_verifier.h
+++ b/src/core/lib/security/credentials/jwt/jwt_verifier.h
@@ -51,7 +51,7 @@ const char* grpc_jwt_verifier_status_to_string(grpc_jwt_verifier_status status);
 
 typedef struct grpc_jwt_claims grpc_jwt_claims;
 
-void grpc_jwt_claims_destroy(grpc_exec_ctx* exec_ctx, grpc_jwt_claims* claims);
+void grpc_jwt_claims_destroy(grpc_jwt_claims* claims);
 
 /* Returns the whole JSON tree of the claims. */
 const grpc_json* grpc_jwt_claims_json(const grpc_jwt_claims* claims);
@@ -94,21 +94,18 @@ grpc_jwt_verifier* grpc_jwt_verifier_create(
     size_t num_mappings);
 
 /*The verifier must not be destroyed if there are still outstanding callbacks.*/
-void grpc_jwt_verifier_destroy(grpc_exec_ctx* exec_ctx,
-                               grpc_jwt_verifier* verifier);
+void grpc_jwt_verifier_destroy(grpc_jwt_verifier* verifier);
 
 /* User provided callback that will be called when the verification of the JWT
    is done (maybe in another thread).
    It is the responsibility of the callee to call grpc_jwt_claims_destroy on
    the claims. */
-typedef void (*grpc_jwt_verification_done_cb)(grpc_exec_ctx* exec_ctx,
-                                              void* user_data,
+typedef void (*grpc_jwt_verification_done_cb)(void* user_data,
                                               grpc_jwt_verifier_status status,
                                               grpc_jwt_claims* claims);
 
 /* Verifies for the JWT for the given expected audience. */
-void grpc_jwt_verifier_verify(grpc_exec_ctx* exec_ctx,
-                              grpc_jwt_verifier* verifier,
+void grpc_jwt_verifier_verify(grpc_jwt_verifier* verifier,
                               grpc_pollset* pollset, const char* jwt,
                               const char* audience,
                               grpc_jwt_verification_done_cb cb,
@@ -116,8 +113,7 @@ void grpc_jwt_verifier_verify(grpc_exec_ctx* exec_ctx,
 
 /* --- TESTING ONLY exposed functions. --- */
 
-grpc_jwt_claims* grpc_jwt_claims_from_json(grpc_exec_ctx* exec_ctx,
-                                           grpc_json* json, grpc_slice buffer);
+grpc_jwt_claims* grpc_jwt_claims_from_json(grpc_json* json, grpc_slice buffer);
 grpc_jwt_verifier_status grpc_jwt_claims_check(const grpc_jwt_claims* claims,
                                                const char* audience);
 const char* grpc_jwt_issuer_email_domain(const char* issuer);
diff --git a/src/core/lib/security/credentials/oauth2/oauth2_credentials.cc b/src/core/lib/security/credentials/oauth2/oauth2_credentials.cc
index ccefb4db9c..e243ea52c6 100644
--- a/src/core/lib/security/credentials/oauth2/oauth2_credentials.cc
+++ b/src/core/lib/security/credentials/oauth2/oauth2_credentials.cc
@@ -103,21 +103,19 @@ void grpc_auth_refresh_token_destruct(grpc_auth_refresh_token* refresh_token) {
 // Oauth2 Token Fetcher credentials.
 //
 
-static void oauth2_token_fetcher_destruct(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_credentials* creds) {
+static void oauth2_token_fetcher_destruct(grpc_call_credentials* creds) {
   grpc_oauth2_token_fetcher_credentials* c =
       (grpc_oauth2_token_fetcher_credentials*)creds;
-  GRPC_MDELEM_UNREF(exec_ctx, c->access_token_md);
+  GRPC_MDELEM_UNREF(c->access_token_md);
   gpr_mu_destroy(&c->mu);
-  grpc_pollset_set_destroy(exec_ctx,
-                           grpc_polling_entity_pollset_set(&c->pollent));
-  grpc_httpcli_context_destroy(exec_ctx, &c->httpcli_context);
+  grpc_pollset_set_destroy(grpc_polling_entity_pollset_set(&c->pollent));
+  grpc_httpcli_context_destroy(&c->httpcli_context);
 }
 
 grpc_credentials_status
 grpc_oauth2_token_fetcher_credentials_parse_server_response(
-    grpc_exec_ctx* exec_ctx, const grpc_http_response* response,
-    grpc_mdelem* token_md, grpc_millis* token_lifetime) {
+    const grpc_http_response* response, grpc_mdelem* token_md,
+    grpc_millis* token_lifetime) {
   char* null_terminated_body = nullptr;
   char* new_access_token = nullptr;
   grpc_credentials_status status = GRPC_CREDENTIALS_OK;
@@ -184,9 +182,8 @@ grpc_oauth2_token_fetcher_credentials_parse_server_response(
     gpr_asprintf(&new_access_token, "%s %s", token_type->value,
                  access_token->value);
     *token_lifetime = strtol(expires_in->value, nullptr, 10) * GPR_MS_PER_SEC;
-    if (!GRPC_MDISNULL(*token_md)) GRPC_MDELEM_UNREF(exec_ctx, *token_md);
+    if (!GRPC_MDISNULL(*token_md)) GRPC_MDELEM_UNREF(*token_md);
     *token_md = grpc_mdelem_from_slices(
-        exec_ctx,
         grpc_slice_from_static_string(GRPC_AUTHORIZATION_METADATA_KEY),
         grpc_slice_from_copied_string(new_access_token));
     status = GRPC_CREDENTIALS_OK;
@@ -194,7 +191,7 @@ grpc_oauth2_token_fetcher_credentials_parse_server_response(
 
 end:
   if (status != GRPC_CREDENTIALS_OK && !GRPC_MDISNULL(*token_md)) {
-    GRPC_MDELEM_UNREF(exec_ctx, *token_md);
+    GRPC_MDELEM_UNREF(*token_md);
     *token_md = GRPC_MDNULL;
   }
   if (null_terminated_body != nullptr) gpr_free(null_terminated_body);
@@ -203,8 +200,7 @@ end:
   return status;
 }
 
-static void on_oauth2_token_fetcher_http_response(grpc_exec_ctx* exec_ctx,
-                                                  void* user_data,
+static void on_oauth2_token_fetcher_http_response(void* user_data,
                                                   grpc_error* error) {
   GRPC_LOG_IF_ERROR("oauth_fetch", GRPC_ERROR_REF(error));
   grpc_credentials_metadata_request* r =
@@ -215,13 +211,13 @@ static void on_oauth2_token_fetcher_http_response(grpc_exec_ctx* exec_ctx,
   grpc_millis token_lifetime;
   grpc_credentials_status status =
       grpc_oauth2_token_fetcher_credentials_parse_server_response(
-          exec_ctx, &r->response, &access_token_md, &token_lifetime);
+          &r->response, &access_token_md, &token_lifetime);
   // Update cache and grab list of pending requests.
   gpr_mu_lock(&c->mu);
   c->token_fetch_pending = false;
   c->access_token_md = GRPC_MDELEM_REF(access_token_md);
   c->token_expiration = status == GRPC_CREDENTIALS_OK
-                            ? grpc_exec_ctx_now(exec_ctx) + token_lifetime
+                            ? grpc_core::ExecCtx::Get()->Now() + token_lifetime
                             : 0;
   grpc_oauth2_pending_get_request_metadata* pending_request =
       c->pending_requests;
@@ -236,24 +232,22 @@ static void on_oauth2_token_fetcher_http_response(grpc_exec_ctx* exec_ctx,
       error = GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
           "Error occured when fetching oauth2 token.", &error, 1);
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, pending_request->on_request_metadata, error);
+    GRPC_CLOSURE_SCHED(pending_request->on_request_metadata, error);
     grpc_polling_entity_del_from_pollset_set(
-        exec_ctx, pending_request->pollent,
-        grpc_polling_entity_pollset_set(&c->pollent));
+        pending_request->pollent, grpc_polling_entity_pollset_set(&c->pollent));
     grpc_oauth2_pending_get_request_metadata* prev = pending_request;
     pending_request = pending_request->next;
     gpr_free(prev);
   }
-  GRPC_MDELEM_UNREF(exec_ctx, access_token_md);
-  grpc_call_credentials_unref(exec_ctx, r->creds);
-  grpc_credentials_metadata_request_destroy(exec_ctx, r);
+  GRPC_MDELEM_UNREF(access_token_md);
+  grpc_call_credentials_unref(r->creds);
+  grpc_credentials_metadata_request_destroy(r);
 }
 
 static bool oauth2_token_fetcher_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_polling_entity* pollent, grpc_auth_metadata_context context,
-    grpc_credentials_mdelem_array* md_array, grpc_closure* on_request_metadata,
-    grpc_error** error) {
+    grpc_call_credentials* creds, grpc_polling_entity* pollent,
+    grpc_auth_metadata_context context, grpc_credentials_mdelem_array* md_array,
+    grpc_closure* on_request_metadata, grpc_error** error) {
   grpc_oauth2_token_fetcher_credentials* c =
       (grpc_oauth2_token_fetcher_credentials*)creds;
   // Check if we can use the cached token.
@@ -262,13 +256,14 @@ static bool oauth2_token_fetcher_get_request_metadata(
   grpc_mdelem cached_access_token_md = GRPC_MDNULL;
   gpr_mu_lock(&c->mu);
   if (!GRPC_MDISNULL(c->access_token_md) &&
-      (c->token_expiration - grpc_exec_ctx_now(exec_ctx) > refresh_threshold)) {
+      (c->token_expiration - grpc_core::ExecCtx::Get()->Now() >
+       refresh_threshold)) {
     cached_access_token_md = GRPC_MDELEM_REF(c->access_token_md);
   }
   if (!GRPC_MDISNULL(cached_access_token_md)) {
     gpr_mu_unlock(&c->mu);
     grpc_credentials_mdelem_array_add(md_array, cached_access_token_md);
-    GRPC_MDELEM_UNREF(exec_ctx, cached_access_token_md);
+    GRPC_MDELEM_UNREF(cached_access_token_md);
     return true;
   }
   // Couldn't get the token from the cache.
@@ -280,7 +275,7 @@ static bool oauth2_token_fetcher_get_request_metadata(
   pending_request->on_request_metadata = on_request_metadata;
   pending_request->pollent = pollent;
   grpc_polling_entity_add_to_pollset_set(
-      exec_ctx, pollent, grpc_polling_entity_pollset_set(&c->pollent));
+      pollent, grpc_polling_entity_pollset_set(&c->pollent));
   pending_request->next = c->pending_requests;
   c->pending_requests = pending_request;
   bool start_fetch = false;
@@ -291,17 +286,17 @@ static bool oauth2_token_fetcher_get_request_metadata(
   gpr_mu_unlock(&c->mu);
   if (start_fetch) {
     grpc_call_credentials_ref(creds);
-    c->fetch_func(exec_ctx, grpc_credentials_metadata_request_create(creds),
+    c->fetch_func(grpc_credentials_metadata_request_create(creds),
                   &c->httpcli_context, &c->pollent,
                   on_oauth2_token_fetcher_http_response,
-                  grpc_exec_ctx_now(exec_ctx) + refresh_threshold);
+                  grpc_core::ExecCtx::Get()->Now() + refresh_threshold);
   }
   return false;
 }
 
 static void oauth2_token_fetcher_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* creds, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   grpc_oauth2_token_fetcher_credentials* c =
       (grpc_oauth2_token_fetcher_credentials*)creds;
   gpr_mu_lock(&c->mu);
@@ -317,7 +312,7 @@ static void oauth2_token_fetcher_cancel_get_request_metadata(
         c->pending_requests = pending_request->next;
       }
       // Invoke the callback immediately with an error.
-      GRPC_CLOSURE_SCHED(exec_ctx, pending_request->on_request_metadata,
+      GRPC_CLOSURE_SCHED(pending_request->on_request_metadata,
                          GRPC_ERROR_REF(error));
       gpr_free(pending_request);
       break;
@@ -351,7 +346,7 @@ static grpc_call_credentials_vtable compute_engine_vtable = {
     oauth2_token_fetcher_cancel_get_request_metadata};
 
 static void compute_engine_fetch_oauth2(
-    grpc_exec_ctx* exec_ctx, grpc_credentials_metadata_request* metadata_req,
+    grpc_credentials_metadata_request* metadata_req,
     grpc_httpcli_context* httpcli_context, grpc_polling_entity* pollent,
     grpc_iomgr_cb_func response_cb, grpc_millis deadline) {
   grpc_http_header header = {(char*)"Metadata-Flavor", (char*)"Google"};
@@ -367,10 +362,10 @@ static void compute_engine_fetch_oauth2(
   grpc_resource_quota* resource_quota =
       grpc_resource_quota_create("oauth2_credentials");
   grpc_httpcli_get(
-      exec_ctx, httpcli_context, pollent, resource_quota, &request, deadline,
+      httpcli_context, pollent, resource_quota, &request, deadline,
       GRPC_CLOSURE_CREATE(response_cb, metadata_req, grpc_schedule_on_exec_ctx),
       &metadata_req->response);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
 }
 
 grpc_call_credentials* grpc_google_compute_engine_credentials_create(
@@ -390,12 +385,11 @@ grpc_call_credentials* grpc_google_compute_engine_credentials_create(
 // Google Refresh Token credentials.
 //
 
-static void refresh_token_destruct(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_credentials* creds) {
+static void refresh_token_destruct(grpc_call_credentials* creds) {
   grpc_google_refresh_token_credentials* c =
       (grpc_google_refresh_token_credentials*)creds;
   grpc_auth_refresh_token_destruct(&c->refresh_token);
-  oauth2_token_fetcher_destruct(exec_ctx, &c->base.base);
+  oauth2_token_fetcher_destruct(&c->base.base);
 }
 
 static grpc_call_credentials_vtable refresh_token_vtable = {
@@ -403,7 +397,7 @@ static grpc_call_credentials_vtable refresh_token_vtable = {
     oauth2_token_fetcher_cancel_get_request_metadata};
 
 static void refresh_token_fetch_oauth2(
-    grpc_exec_ctx* exec_ctx, grpc_credentials_metadata_request* metadata_req,
+    grpc_credentials_metadata_request* metadata_req,
     grpc_httpcli_context* httpcli_context, grpc_polling_entity* pollent,
     grpc_iomgr_cb_func response_cb, grpc_millis deadline) {
   grpc_google_refresh_token_credentials* c =
@@ -427,11 +421,11 @@ static void refresh_token_fetch_oauth2(
   grpc_resource_quota* resource_quota =
       grpc_resource_quota_create("oauth2_credentials_refresh");
   grpc_httpcli_post(
-      exec_ctx, httpcli_context, pollent, resource_quota, &request, body,
-      strlen(body), deadline,
+      httpcli_context, pollent, resource_quota, &request, body, strlen(body),
+      deadline,
       GRPC_CLOSURE_CREATE(response_cb, metadata_req, grpc_schedule_on_exec_ctx),
       &metadata_req->response);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
   gpr_free(body);
 }
 
@@ -483,25 +477,23 @@ grpc_call_credentials* grpc_google_refresh_token_credentials_create(
 // Oauth2 Access Token credentials.
 //
 
-static void access_token_destruct(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_credentials* creds) {
+static void access_token_destruct(grpc_call_credentials* creds) {
   grpc_access_token_credentials* c = (grpc_access_token_credentials*)creds;
-  GRPC_MDELEM_UNREF(exec_ctx, c->access_token_md);
+  GRPC_MDELEM_UNREF(c->access_token_md);
 }
 
 static bool access_token_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_polling_entity* pollent, grpc_auth_metadata_context context,
-    grpc_credentials_mdelem_array* md_array, grpc_closure* on_request_metadata,
-    grpc_error** error) {
+    grpc_call_credentials* creds, grpc_polling_entity* pollent,
+    grpc_auth_metadata_context context, grpc_credentials_mdelem_array* md_array,
+    grpc_closure* on_request_metadata, grpc_error** error) {
   grpc_access_token_credentials* c = (grpc_access_token_credentials*)creds;
   grpc_credentials_mdelem_array_add(md_array, c->access_token_md);
   return true;
 }
 
 static void access_token_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* c,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* c, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   GRPC_ERROR_UNREF(error);
 }
 
@@ -523,11 +515,11 @@ grpc_call_credentials* grpc_access_token_credentials_create(
   gpr_ref_init(&c->base.refcount, 1);
   char* token_md_value;
   gpr_asprintf(&token_md_value, "Bearer %s", access_token);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   c->access_token_md = grpc_mdelem_from_slices(
-      &exec_ctx, grpc_slice_from_static_string(GRPC_AUTHORIZATION_METADATA_KEY),
+      grpc_slice_from_static_string(GRPC_AUTHORIZATION_METADATA_KEY),
       grpc_slice_from_copied_string(token_md_value));
-  grpc_exec_ctx_finish(&exec_ctx);
+
   gpr_free(token_md_value);
   return &c->base;
 }
diff --git a/src/core/lib/security/credentials/oauth2/oauth2_credentials.h b/src/core/lib/security/credentials/oauth2/oauth2_credentials.h
index 627783d648..e5b8df8eb9 100644
--- a/src/core/lib/security/credentials/oauth2/oauth2_credentials.h
+++ b/src/core/lib/security/credentials/oauth2/oauth2_credentials.h
@@ -52,8 +52,7 @@ void grpc_auth_refresh_token_destruct(grpc_auth_refresh_token* refresh_token);
 //  This object is a base for credentials that need to acquire an oauth2 token
 //  from an http service.
 
-typedef void (*grpc_fetch_oauth2_func)(grpc_exec_ctx* exec_ctx,
-                                       grpc_credentials_metadata_request* req,
+typedef void (*grpc_fetch_oauth2_func)(grpc_credentials_metadata_request* req,
                                        grpc_httpcli_context* http_context,
                                        grpc_polling_entity* pollent,
                                        grpc_iomgr_cb_func cb,
@@ -99,7 +98,7 @@ grpc_refresh_token_credentials_create_from_auth_refresh_token(
 // Exposed for testing only.
 grpc_credentials_status
 grpc_oauth2_token_fetcher_credentials_parse_server_response(
-    grpc_exec_ctx* exec_ctx, const struct grpc_http_response* response,
-    grpc_mdelem* token_md, grpc_millis* token_lifetime);
+    const struct grpc_http_response* response, grpc_mdelem* token_md,
+    grpc_millis* token_lifetime);
 
 #endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_OAUTH2_OAUTH2_CREDENTIALS_H */
diff --git a/src/core/lib/security/credentials/plugin/plugin_credentials.cc b/src/core/lib/security/credentials/plugin/plugin_credentials.cc
index 1f1efd078d..203ba58c67 100644
--- a/src/core/lib/security/credentials/plugin/plugin_credentials.cc
+++ b/src/core/lib/security/credentials/plugin/plugin_credentials.cc
@@ -33,8 +33,7 @@
 
 grpc_core::TraceFlag grpc_plugin_credentials_trace(false, "plugin_credentials");
 
-static void plugin_destruct(grpc_exec_ctx* exec_ctx,
-                            grpc_call_credentials* creds) {
+static void plugin_destruct(grpc_call_credentials* creds) {
   grpc_plugin_credentials* c = (grpc_plugin_credentials*)creds;
   gpr_mu_destroy(&c->mu);
   if (c->plugin.state != nullptr && c->plugin.destroy != nullptr) {
@@ -61,18 +60,17 @@ static void pending_request_remove_locked(
 // When this returns, r->cancelled indicates whether the request was
 // cancelled before completion.
 static void pending_request_complete(
-    grpc_exec_ctx* exec_ctx, grpc_plugin_credentials_pending_request* r) {
+    grpc_plugin_credentials_pending_request* r) {
   gpr_mu_lock(&r->creds->mu);
   if (!r->cancelled) pending_request_remove_locked(r->creds, r);
   gpr_mu_unlock(&r->creds->mu);
   // Ref to credentials not needed anymore.
-  grpc_call_credentials_unref(exec_ctx, &r->creds->base);
+  grpc_call_credentials_unref(&r->creds->base);
 }
 
 static grpc_error* process_plugin_result(
-    grpc_exec_ctx* exec_ctx, grpc_plugin_credentials_pending_request* r,
-    const grpc_metadata* md, size_t num_md, grpc_status_code status,
-    const char* error_details) {
+    grpc_plugin_credentials_pending_request* r, const grpc_metadata* md,
+    size_t num_md, grpc_status_code status, const char* error_details) {
   grpc_error* error = GRPC_ERROR_NONE;
   if (status != GRPC_STATUS_OK) {
     char* msg;
@@ -100,11 +98,11 @@ static grpc_error* process_plugin_result(
       error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Illegal metadata");
     } else {
       for (size_t i = 0; i < num_md; ++i) {
-        grpc_mdelem mdelem = grpc_mdelem_from_slices(
-            exec_ctx, grpc_slice_ref_internal(md[i].key),
-            grpc_slice_ref_internal(md[i].value));
+        grpc_mdelem mdelem =
+            grpc_mdelem_from_slices(grpc_slice_ref_internal(md[i].key),
+                                    grpc_slice_ref_internal(md[i].value));
         grpc_credentials_mdelem_array_add(r->md_array, mdelem);
-        GRPC_MDELEM_UNREF(exec_ctx, mdelem);
+        GRPC_MDELEM_UNREF(mdelem);
       }
     }
   }
@@ -117,9 +115,8 @@ static void plugin_md_request_metadata_ready(void* request,
                                              grpc_status_code status,
                                              const char* error_details) {
   /* called from application code */
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INITIALIZER(
-      GRPC_EXEC_CTX_FLAG_IS_FINISHED | GRPC_EXEC_CTX_FLAG_THREAD_RESOURCE_LOOP,
-      nullptr, nullptr);
+  grpc_core::ExecCtx exec_ctx(GRPC_EXEC_CTX_FLAG_IS_FINISHED |
+                              GRPC_EXEC_CTX_FLAG_THREAD_RESOURCE_LOOP);
   grpc_plugin_credentials_pending_request* r =
       (grpc_plugin_credentials_pending_request*)request;
   if (grpc_plugin_credentials_trace.enabled()) {
@@ -129,12 +126,12 @@ static void plugin_md_request_metadata_ready(void* request,
             r->creds, r);
   }
   // Remove request from pending list if not previously cancelled.
-  pending_request_complete(&exec_ctx, r);
+  pending_request_complete(r);
   // If it has not been cancelled, process it.
   if (!r->cancelled) {
     grpc_error* error =
-        process_plugin_result(&exec_ctx, r, md, num_md, status, error_details);
-    GRPC_CLOSURE_SCHED(&exec_ctx, r->on_request_metadata, error);
+        process_plugin_result(r, md, num_md, status, error_details);
+    GRPC_CLOSURE_SCHED(r->on_request_metadata, error);
   } else if (grpc_plugin_credentials_trace.enabled()) {
     gpr_log(GPR_INFO,
             "plugin_credentials[%p]: request %p: plugin was previously "
@@ -142,11 +139,9 @@ static void plugin_md_request_metadata_ready(void* request,
             r->creds, r);
   }
   gpr_free(r);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static bool plugin_get_request_metadata(grpc_exec_ctx* exec_ctx,
-                                        grpc_call_credentials* creds,
+static bool plugin_get_request_metadata(grpc_call_credentials* creds,
                                         grpc_polling_entity* pollent,
                                         grpc_auth_metadata_context context,
                                         grpc_credentials_mdelem_array* md_array,
@@ -194,7 +189,7 @@ static bool plugin_get_request_metadata(grpc_exec_ctx* exec_ctx,
     }
     // Returned synchronously.
     // Remove request from pending list if not previously cancelled.
-    pending_request_complete(exec_ctx, pending_request);
+    pending_request_complete(pending_request);
     // If the request was cancelled, the error will have been returned
     // asynchronously by plugin_cancel_get_request_metadata(), so return
     // false.  Otherwise, process the result.
@@ -213,13 +208,13 @@ static bool plugin_get_request_metadata(grpc_exec_ctx* exec_ctx,
                 "synchronously",
                 c, pending_request);
       }
-      *error = process_plugin_result(exec_ctx, pending_request, creds_md,
-                                     num_creds_md, status, error_details);
+      *error = process_plugin_result(pending_request, creds_md, num_creds_md,
+                                     status, error_details);
     }
     // Clean up.
     for (size_t i = 0; i < num_creds_md; ++i) {
-      grpc_slice_unref_internal(exec_ctx, creds_md[i].key);
-      grpc_slice_unref_internal(exec_ctx, creds_md[i].value);
+      grpc_slice_unref_internal(creds_md[i].key);
+      grpc_slice_unref_internal(creds_md[i].value);
     }
     gpr_free((void*)error_details);
     gpr_free(pending_request);
@@ -228,8 +223,8 @@ static bool plugin_get_request_metadata(grpc_exec_ctx* exec_ctx,
 }
 
 static void plugin_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* creds, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   grpc_plugin_credentials* c = (grpc_plugin_credentials*)creds;
   gpr_mu_lock(&c->mu);
   for (grpc_plugin_credentials_pending_request* pending_request =
@@ -241,7 +236,7 @@ static void plugin_cancel_get_request_metadata(
                 pending_request);
       }
       pending_request->cancelled = true;
-      GRPC_CLOSURE_SCHED(exec_ctx, pending_request->on_request_metadata,
+      GRPC_CLOSURE_SCHED(pending_request->on_request_metadata,
                          GRPC_ERROR_REF(error));
       pending_request_remove_locked(c, pending_request);
       break;
diff --git a/src/core/lib/security/credentials/ssl/ssl_credentials.cc b/src/core/lib/security/credentials/ssl/ssl_credentials.cc
index 39dd38cf88..d8546441c9 100644
--- a/src/core/lib/security/credentials/ssl/ssl_credentials.cc
+++ b/src/core/lib/security/credentials/ssl/ssl_credentials.cc
@@ -41,18 +41,16 @@ void grpc_tsi_ssl_pem_key_cert_pairs_destroy(tsi_ssl_pem_key_cert_pair* kp,
   gpr_free(kp);
 }
 
-static void ssl_destruct(grpc_exec_ctx* exec_ctx,
-                         grpc_channel_credentials* creds) {
+static void ssl_destruct(grpc_channel_credentials* creds) {
   grpc_ssl_credentials* c = (grpc_ssl_credentials*)creds;
   gpr_free(c->config.pem_root_certs);
   grpc_tsi_ssl_pem_key_cert_pairs_destroy(c->config.pem_key_cert_pair, 1);
 }
 
 static grpc_security_status ssl_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* creds,
-    grpc_call_credentials* call_creds, const char* target,
-    const grpc_channel_args* args, grpc_channel_security_connector** sc,
-    grpc_channel_args** new_args) {
+    grpc_channel_credentials* creds, grpc_call_credentials* call_creds,
+    const char* target, const grpc_channel_args* args,
+    grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
   grpc_ssl_credentials* c = (grpc_ssl_credentials*)creds;
   grpc_security_status status = GRPC_SECURITY_OK;
   const char* overridden_target_name = nullptr;
@@ -65,8 +63,7 @@ static grpc_security_status ssl_create_security_connector(
     }
   }
   status = grpc_ssl_channel_security_connector_create(
-      exec_ctx, creds, call_creds, &c->config, target, overridden_target_name,
-      sc);
+      creds, call_creds, &c->config, target, overridden_target_name, sc);
   if (status != GRPC_SECURITY_OK) {
     return status;
   }
@@ -125,8 +122,7 @@ struct grpc_ssl_server_credentials_options {
   grpc_ssl_server_certificate_config_fetcher* certificate_config_fetcher;
 };
 
-static void ssl_server_destruct(grpc_exec_ctx* exec_ctx,
-                                grpc_server_credentials* creds) {
+static void ssl_server_destruct(grpc_server_credentials* creds) {
   grpc_ssl_server_credentials* c = (grpc_ssl_server_credentials*)creds;
   grpc_tsi_ssl_pem_key_cert_pairs_destroy(c->config.pem_key_cert_pairs,
                                           c->config.num_key_cert_pairs);
@@ -134,9 +130,8 @@ static void ssl_server_destruct(grpc_exec_ctx* exec_ctx,
 }
 
 static grpc_security_status ssl_server_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_server_credentials* creds,
-    grpc_server_security_connector** sc) {
-  return grpc_ssl_server_security_connector_create(exec_ctx, creds, sc);
+    grpc_server_credentials* creds, grpc_server_security_connector** sc) {
+  return grpc_ssl_server_security_connector_create(creds, sc);
 }
 
 static grpc_server_credentials_vtable ssl_server_vtable = {
diff --git a/src/core/lib/security/transport/client_auth_filter.cc b/src/core/lib/security/transport/client_auth_filter.cc
index 326f4d7773..cd3c2e3f19 100644
--- a/src/core/lib/security/transport/client_auth_filter.cc
+++ b/src/core/lib/security/transport/client_auth_filter.cc
@@ -90,8 +90,7 @@ static void add_error(grpc_error** combined, grpc_error* error) {
   *combined = grpc_error_add_child(*combined, error);
 }
 
-static void on_credentials_metadata(grpc_exec_ctx* exec_ctx, void* arg,
-                                    grpc_error* input_error) {
+static void on_credentials_metadata(void* arg, grpc_error* input_error) {
   grpc_transport_stream_op_batch* batch = (grpc_transport_stream_op_batch*)arg;
   grpc_call_element* elem =
       (grpc_call_element*)batch->handler_private.extra_arg;
@@ -105,16 +104,16 @@ static void on_credentials_metadata(grpc_exec_ctx* exec_ctx, void* arg,
         batch->payload->send_initial_metadata.send_initial_metadata;
     for (size_t i = 0; i < calld->md_array.size; ++i) {
       add_error(&error, grpc_metadata_batch_add_tail(
-                            exec_ctx, mdb, &calld->md_links[i],
+                            mdb, &calld->md_links[i],
                             GRPC_MDELEM_REF(calld->md_array.md[i])));
     }
   }
   if (error == GRPC_ERROR_NONE) {
-    grpc_call_next_op(exec_ctx, elem, batch);
+    grpc_call_next_op(elem, batch);
   } else {
     error = grpc_error_set_int(error, GRPC_ERROR_INT_GRPC_STATUS,
                                GRPC_STATUS_UNAUTHENTICATED);
-    grpc_transport_stream_op_batch_finish_with_failure(exec_ctx, batch, error,
+    grpc_transport_stream_op_batch_finish_with_failure(batch, error,
                                                        calld->call_combiner);
   }
 }
@@ -156,20 +155,17 @@ void grpc_auth_metadata_context_build(
   gpr_free(host_and_port);
 }
 
-static void cancel_get_request_metadata(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void cancel_get_request_metadata(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   if (error != GRPC_ERROR_NONE) {
     grpc_call_credentials_cancel_get_request_metadata(
-        exec_ctx, calld->creds, &calld->md_array, GRPC_ERROR_REF(error));
+        calld->creds, &calld->md_array, GRPC_ERROR_REF(error));
   }
-  GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call,
-                        "cancel_get_request_metadata");
+  GRPC_CALL_STACK_UNREF(calld->owning_call, "cancel_get_request_metadata");
 }
 
-static void send_security_metadata(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem,
+static void send_security_metadata(grpc_call_element* elem,
                                    grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -183,7 +179,7 @@ static void send_security_metadata(grpc_exec_ctx* exec_ctx,
 
   if (channel_call_creds == nullptr && !call_creds_has_md) {
     /* Skip sending metadata altogether. */
-    grpc_call_next_op(exec_ctx, elem, batch);
+    grpc_call_next_op(elem, batch);
     return;
   }
 
@@ -192,7 +188,7 @@ static void send_security_metadata(grpc_exec_ctx* exec_ctx,
                                                           ctx->creds, nullptr);
     if (calld->creds == nullptr) {
       grpc_transport_stream_op_batch_finish_with_failure(
-          exec_ctx, batch,
+          batch,
           grpc_error_set_int(
               GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                   "Incompatible credentials set on channel and call."),
@@ -215,30 +211,29 @@ static void send_security_metadata(grpc_exec_ctx* exec_ctx,
                     batch, grpc_schedule_on_exec_ctx);
   grpc_error* error = GRPC_ERROR_NONE;
   if (grpc_call_credentials_get_request_metadata(
-          exec_ctx, calld->creds, calld->pollent, calld->auth_md_context,
+          calld->creds, calld->pollent, calld->auth_md_context,
           &calld->md_array, &calld->async_result_closure, &error)) {
     // Synchronous return; invoke on_credentials_metadata() directly.
-    on_credentials_metadata(exec_ctx, batch, error);
+    on_credentials_metadata(batch, error);
     GRPC_ERROR_UNREF(error);
   } else {
     // Async return; register cancellation closure with call combiner.
     GRPC_CALL_STACK_REF(calld->owning_call, "cancel_get_request_metadata");
     grpc_call_combiner_set_notify_on_cancel(
-        exec_ctx, calld->call_combiner,
+        calld->call_combiner,
         GRPC_CLOSURE_INIT(&calld->get_request_metadata_cancel_closure,
                           cancel_get_request_metadata, elem,
                           grpc_schedule_on_exec_ctx));
   }
 }
 
-static void on_host_checked(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void on_host_checked(void* arg, grpc_error* error) {
   grpc_transport_stream_op_batch* batch = (grpc_transport_stream_op_batch*)arg;
   grpc_call_element* elem =
       (grpc_call_element*)batch->handler_private.extra_arg;
   call_data* calld = (call_data*)elem->call_data;
   if (error == GRPC_ERROR_NONE) {
-    send_security_metadata(exec_ctx, elem, batch);
+    send_security_metadata(elem, batch);
   } else {
     char* error_msg;
     char* host = grpc_slice_to_c_string(calld->host);
@@ -246,7 +241,7 @@ static void on_host_checked(grpc_exec_ctx* exec_ctx, void* arg,
                  host);
     gpr_free(host);
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, batch,
+        batch,
         grpc_error_set_int(GRPC_ERROR_CREATE_FROM_COPIED_STRING(error_msg),
                            GRPC_ERROR_INT_GRPC_STATUS,
                            GRPC_STATUS_UNAUTHENTICATED),
@@ -255,22 +250,20 @@ static void on_host_checked(grpc_exec_ctx* exec_ctx, void* arg,
   }
 }
 
-static void cancel_check_call_host(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void cancel_check_call_host(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   if (error != GRPC_ERROR_NONE) {
     grpc_channel_security_connector_cancel_check_call_host(
-        exec_ctx, chand->security_connector, &calld->async_result_closure,
+        chand->security_connector, &calld->async_result_closure,
         GRPC_ERROR_REF(error));
   }
-  GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "cancel_check_call_host");
+  GRPC_CALL_STACK_UNREF(calld->owning_call, "cancel_check_call_host");
 }
 
 static void auth_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   GPR_TIMER_BEGIN("auth_start_transport_stream_op_batch", 0);
 
   /* grab pointers to our data from the call element */
@@ -303,13 +296,13 @@ static void auth_start_transport_stream_op_batch(
        */
       if (grpc_slice_eq(GRPC_MDKEY(md), GRPC_MDSTR_AUTHORITY)) {
         if (calld->have_host) {
-          grpc_slice_unref_internal(exec_ctx, calld->host);
+          grpc_slice_unref_internal(calld->host);
         }
         calld->host = grpc_slice_ref_internal(GRPC_MDVALUE(md));
         calld->have_host = true;
       } else if (grpc_slice_eq(GRPC_MDKEY(md), GRPC_MDSTR_PATH)) {
         if (calld->have_method) {
-          grpc_slice_unref_internal(exec_ctx, calld->method);
+          grpc_slice_unref_internal(calld->method);
         }
         calld->method = grpc_slice_ref_internal(GRPC_MDVALUE(md));
         calld->have_method = true;
@@ -322,16 +315,16 @@ static void auth_start_transport_stream_op_batch(
       char* call_host = grpc_slice_to_c_string(calld->host);
       grpc_error* error = GRPC_ERROR_NONE;
       if (grpc_channel_security_connector_check_call_host(
-              exec_ctx, chand->security_connector, call_host,
-              chand->auth_context, &calld->async_result_closure, &error)) {
+              chand->security_connector, call_host, chand->auth_context,
+              &calld->async_result_closure, &error)) {
         // Synchronous return; invoke on_host_checked() directly.
-        on_host_checked(exec_ctx, batch, error);
+        on_host_checked(batch, error);
         GRPC_ERROR_UNREF(error);
       } else {
         // Async return; register cancellation closure with call combiner.
         GRPC_CALL_STACK_REF(calld->owning_call, "cancel_check_call_host");
         grpc_call_combiner_set_notify_on_cancel(
-            exec_ctx, calld->call_combiner,
+            calld->call_combiner,
             GRPC_CLOSURE_INIT(&calld->check_call_host_cancel_closure,
                               cancel_check_call_host, elem,
                               grpc_schedule_on_exec_ctx));
@@ -343,13 +336,12 @@ static void auth_start_transport_stream_op_batch(
   }
 
   /* pass control down the stack */
-  grpc_call_next_op(exec_ctx, elem, batch);
+  grpc_call_next_op(elem, batch);
   GPR_TIMER_END("auth_start_transport_stream_op_batch", 0);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   calld->owning_call = args->call_stack;
@@ -357,32 +349,30 @@ static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static void set_pollset_or_pollset_set(grpc_exec_ctx* exec_ctx,
-                                       grpc_call_element* elem,
+static void set_pollset_or_pollset_set(grpc_call_element* elem,
                                        grpc_polling_entity* pollent) {
   call_data* calld = (call_data*)elem->call_data;
   calld->pollent = pollent;
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   call_data* calld = (call_data*)elem->call_data;
-  grpc_credentials_mdelem_array_destroy(exec_ctx, &calld->md_array);
-  grpc_call_credentials_unref(exec_ctx, calld->creds);
+  grpc_credentials_mdelem_array_destroy(&calld->md_array);
+  grpc_call_credentials_unref(calld->creds);
   if (calld->have_host) {
-    grpc_slice_unref_internal(exec_ctx, calld->host);
+    grpc_slice_unref_internal(calld->host);
   }
   if (calld->have_method) {
-    grpc_slice_unref_internal(exec_ctx, calld->method);
+    grpc_slice_unref_internal(calld->method);
   }
   grpc_auth_metadata_context_reset(&calld->auth_md_context);
 }
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   grpc_security_connector* sc =
       grpc_security_connector_find_in_args(args->channel_args);
@@ -415,13 +405,12 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
 }
 
 /* Destructor for channel data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   /* grab pointers to our data from the channel element */
   channel_data* chand = (channel_data*)elem->channel_data;
   grpc_channel_security_connector* sc = chand->security_connector;
   if (sc != nullptr) {
-    GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, &sc->base, "client_auth_filter");
+    GRPC_SECURITY_CONNECTOR_UNREF(&sc->base, "client_auth_filter");
   }
   GRPC_AUTH_CONTEXT_UNREF(chand->auth_context, "client_auth_filter");
 }
diff --git a/src/core/lib/security/transport/lb_targets_info.cc b/src/core/lib/security/transport/lb_targets_info.cc
index c07be35840..183b1ebf35 100644
--- a/src/core/lib/security/transport/lb_targets_info.cc
+++ b/src/core/lib/security/transport/lb_targets_info.cc
@@ -28,8 +28,8 @@
 static void* targets_info_copy(void* p) {
   return grpc_slice_hash_table_ref((grpc_slice_hash_table*)p);
 }
-static void targets_info_destroy(grpc_exec_ctx* exec_ctx, void* p) {
-  grpc_slice_hash_table_unref(exec_ctx, (grpc_slice_hash_table*)p);
+static void targets_info_destroy(void* p) {
+  grpc_slice_hash_table_unref((grpc_slice_hash_table*)p);
 }
 static int targets_info_cmp(void* a, void* b) {
   return grpc_slice_hash_table_cmp((const grpc_slice_hash_table*)a,
diff --git a/src/core/lib/security/transport/secure_endpoint.cc b/src/core/lib/security/transport/secure_endpoint.cc
index 4cd317a06d..e5c089de9c 100644
--- a/src/core/lib/security/transport/secure_endpoint.cc
+++ b/src/core/lib/security/transport/secure_endpoint.cc
@@ -63,28 +63,27 @@ typedef struct {
 
 grpc_core::TraceFlag grpc_trace_secure_endpoint(false, "secure_endpoint");
 
-static void destroy(grpc_exec_ctx* exec_ctx, secure_endpoint* secure_ep) {
+static void destroy(secure_endpoint* secure_ep) {
   secure_endpoint* ep = secure_ep;
-  grpc_endpoint_destroy(exec_ctx, ep->wrapped_ep);
+  grpc_endpoint_destroy(ep->wrapped_ep);
   tsi_frame_protector_destroy(ep->protector);
-  tsi_zero_copy_grpc_protector_destroy(exec_ctx, ep->zero_copy_protector);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &ep->leftover_bytes);
-  grpc_slice_unref_internal(exec_ctx, ep->read_staging_buffer);
-  grpc_slice_unref_internal(exec_ctx, ep->write_staging_buffer);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &ep->output_buffer);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &ep->source_buffer);
+  tsi_zero_copy_grpc_protector_destroy(ep->zero_copy_protector);
+  grpc_slice_buffer_destroy_internal(&ep->leftover_bytes);
+  grpc_slice_unref_internal(ep->read_staging_buffer);
+  grpc_slice_unref_internal(ep->write_staging_buffer);
+  grpc_slice_buffer_destroy_internal(&ep->output_buffer);
+  grpc_slice_buffer_destroy_internal(&ep->source_buffer);
   gpr_mu_destroy(&ep->protector_mu);
   gpr_free(ep);
 }
 
 #ifndef NDEBUG
-#define SECURE_ENDPOINT_UNREF(exec_ctx, ep, reason) \
-  secure_endpoint_unref((exec_ctx), (ep), (reason), __FILE__, __LINE__)
+#define SECURE_ENDPOINT_UNREF(ep, reason) \
+  secure_endpoint_unref((ep), (reason), __FILE__, __LINE__)
 #define SECURE_ENDPOINT_REF(ep, reason) \
   secure_endpoint_ref((ep), (reason), __FILE__, __LINE__)
-static void secure_endpoint_unref(grpc_exec_ctx* exec_ctx, secure_endpoint* ep,
-                                  const char* reason, const char* file,
-                                  int line) {
+static void secure_endpoint_unref(secure_endpoint* ep, const char* reason,
+                                  const char* file, int line) {
   if (grpc_trace_secure_endpoint.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&ep->ref.count);
     gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
@@ -92,7 +91,7 @@ static void secure_endpoint_unref(grpc_exec_ctx* exec_ctx, secure_endpoint* ep,
             val - 1);
   }
   if (gpr_unref(&ep->ref)) {
-    destroy(exec_ctx, ep);
+    destroy(ep);
   }
 }
 
@@ -107,13 +106,11 @@ static void secure_endpoint_ref(secure_endpoint* ep, const char* reason,
   gpr_ref(&ep->ref);
 }
 #else
-#define SECURE_ENDPOINT_UNREF(exec_ctx, ep, reason) \
-  secure_endpoint_unref((exec_ctx), (ep))
+#define SECURE_ENDPOINT_UNREF(ep, reason) secure_endpoint_unref((ep))
 #define SECURE_ENDPOINT_REF(ep, reason) secure_endpoint_ref((ep))
-static void secure_endpoint_unref(grpc_exec_ctx* exec_ctx,
-                                  secure_endpoint* ep) {
+static void secure_endpoint_unref(secure_endpoint* ep) {
   if (gpr_unref(&ep->ref)) {
-    destroy(exec_ctx, ep);
+    destroy(ep);
   }
 }
 
@@ -128,8 +125,7 @@ static void flush_read_staging_buffer(secure_endpoint* ep, uint8_t** cur,
   *end = GRPC_SLICE_END_PTR(ep->read_staging_buffer);
 }
 
-static void call_read_cb(grpc_exec_ctx* exec_ctx, secure_endpoint* ep,
-                         grpc_error* error) {
+static void call_read_cb(secure_endpoint* ep, grpc_error* error) {
   if (grpc_trace_secure_endpoint.enabled()) {
     size_t i;
     for (i = 0; i < ep->read_buffer->count; i++) {
@@ -140,12 +136,11 @@ static void call_read_cb(grpc_exec_ctx* exec_ctx, secure_endpoint* ep,
     }
   }
   ep->read_buffer = nullptr;
-  GRPC_CLOSURE_SCHED(exec_ctx, ep->read_cb, error);
-  SECURE_ENDPOINT_UNREF(exec_ctx, ep, "read");
+  GRPC_CLOSURE_SCHED(ep->read_cb, error);
+  SECURE_ENDPOINT_UNREF(ep, "read");
 }
 
-static void on_read(grpc_exec_ctx* exec_ctx, void* user_data,
-                    grpc_error* error) {
+static void on_read(void* user_data, grpc_error* error) {
   unsigned i;
   uint8_t keep_looping = 0;
   tsi_result result = TSI_OK;
@@ -154,17 +149,16 @@ static void on_read(grpc_exec_ctx* exec_ctx, void* user_data,
   uint8_t* end = GRPC_SLICE_END_PTR(ep->read_staging_buffer);
 
   if (error != GRPC_ERROR_NONE) {
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, ep->read_buffer);
-    call_read_cb(exec_ctx, ep,
-                 GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-                     "Secure read failed", &error, 1));
+    grpc_slice_buffer_reset_and_unref_internal(ep->read_buffer);
+    call_read_cb(ep, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                         "Secure read failed", &error, 1));
     return;
   }
 
   if (ep->zero_copy_protector != nullptr) {
     // Use zero-copy grpc protector to unprotect.
     result = tsi_zero_copy_grpc_protector_unprotect(
-        exec_ctx, ep->zero_copy_protector, &ep->source_buffer, ep->read_buffer);
+        ep->zero_copy_protector, &ep->source_buffer, ep->read_buffer);
   } else {
     // Use frame protector to unprotect.
     /* TODO(yangg) check error, maybe bail out early */
@@ -217,37 +211,35 @@ static void on_read(grpc_exec_ctx* exec_ctx, void* user_data,
 
   /* TODO(yangg) experiment with moving this block after read_cb to see if it
      helps latency */
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &ep->source_buffer);
+  grpc_slice_buffer_reset_and_unref_internal(&ep->source_buffer);
 
   if (result != TSI_OK) {
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, ep->read_buffer);
+    grpc_slice_buffer_reset_and_unref_internal(ep->read_buffer);
     call_read_cb(
-        exec_ctx, ep,
-        grpc_set_tsi_error_result(
-            GRPC_ERROR_CREATE_FROM_STATIC_STRING("Unwrap failed"), result));
+        ep, grpc_set_tsi_error_result(
+                GRPC_ERROR_CREATE_FROM_STATIC_STRING("Unwrap failed"), result));
     return;
   }
 
-  call_read_cb(exec_ctx, ep, GRPC_ERROR_NONE);
+  call_read_cb(ep, GRPC_ERROR_NONE);
 }
 
-static void endpoint_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* secure_ep,
-                          grpc_slice_buffer* slices, grpc_closure* cb) {
+static void endpoint_read(grpc_endpoint* secure_ep, grpc_slice_buffer* slices,
+                          grpc_closure* cb) {
   secure_endpoint* ep = (secure_endpoint*)secure_ep;
   ep->read_cb = cb;
   ep->read_buffer = slices;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, ep->read_buffer);
+  grpc_slice_buffer_reset_and_unref_internal(ep->read_buffer);
 
   SECURE_ENDPOINT_REF(ep, "read");
   if (ep->leftover_bytes.count) {
     grpc_slice_buffer_swap(&ep->leftover_bytes, &ep->source_buffer);
     GPR_ASSERT(ep->leftover_bytes.count == 0);
-    on_read(exec_ctx, ep, GRPC_ERROR_NONE);
+    on_read(ep, GRPC_ERROR_NONE);
     return;
   }
 
-  grpc_endpoint_read(exec_ctx, ep->wrapped_ep, &ep->source_buffer,
-                     &ep->on_read);
+  grpc_endpoint_read(ep->wrapped_ep, &ep->source_buffer, &ep->on_read);
 }
 
 static void flush_write_staging_buffer(secure_endpoint* ep, uint8_t** cur,
@@ -258,8 +250,8 @@ static void flush_write_staging_buffer(secure_endpoint* ep, uint8_t** cur,
   *end = GRPC_SLICE_END_PTR(ep->write_staging_buffer);
 }
 
-static void endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* secure_ep,
-                           grpc_slice_buffer* slices, grpc_closure* cb) {
+static void endpoint_write(grpc_endpoint* secure_ep, grpc_slice_buffer* slices,
+                           grpc_closure* cb) {
   GPR_TIMER_BEGIN("secure_endpoint.endpoint_write", 0);
 
   unsigned i;
@@ -268,7 +260,7 @@ static void endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* secure_ep,
   uint8_t* cur = GRPC_SLICE_START_PTR(ep->write_staging_buffer);
   uint8_t* end = GRPC_SLICE_END_PTR(ep->write_staging_buffer);
 
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &ep->output_buffer);
+  grpc_slice_buffer_reset_and_unref_internal(&ep->output_buffer);
 
   if (grpc_trace_secure_endpoint.enabled()) {
     for (i = 0; i < slices->count; i++) {
@@ -281,8 +273,8 @@ static void endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* secure_ep,
 
   if (ep->zero_copy_protector != nullptr) {
     // Use zero-copy grpc protector to protect.
-    result = tsi_zero_copy_grpc_protector_protect(
-        exec_ctx, ep->zero_copy_protector, slices, &ep->output_buffer);
+    result = tsi_zero_copy_grpc_protector_protect(ep->zero_copy_protector,
+                                                  slices, &ep->output_buffer);
   } else {
     // Use frame protector to protect.
     for (i = 0; i < slices->count; i++) {
@@ -340,50 +332,44 @@ static void endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* secure_ep,
 
   if (result != TSI_OK) {
     /* TODO(yangg) do different things according to the error type? */
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &ep->output_buffer);
+    grpc_slice_buffer_reset_and_unref_internal(&ep->output_buffer);
     GRPC_CLOSURE_SCHED(
-        exec_ctx, cb,
-        grpc_set_tsi_error_result(
-            GRPC_ERROR_CREATE_FROM_STATIC_STRING("Wrap failed"), result));
+        cb, grpc_set_tsi_error_result(
+                GRPC_ERROR_CREATE_FROM_STATIC_STRING("Wrap failed"), result));
     GPR_TIMER_END("secure_endpoint.endpoint_write", 0);
     return;
   }
 
-  grpc_endpoint_write(exec_ctx, ep->wrapped_ep, &ep->output_buffer, cb);
+  grpc_endpoint_write(ep->wrapped_ep, &ep->output_buffer, cb);
   GPR_TIMER_END("secure_endpoint.endpoint_write", 0);
 }
 
-static void endpoint_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* secure_ep,
-                              grpc_error* why) {
+static void endpoint_shutdown(grpc_endpoint* secure_ep, grpc_error* why) {
   secure_endpoint* ep = (secure_endpoint*)secure_ep;
-  grpc_endpoint_shutdown(exec_ctx, ep->wrapped_ep, why);
+  grpc_endpoint_shutdown(ep->wrapped_ep, why);
 }
 
-static void endpoint_destroy(grpc_exec_ctx* exec_ctx,
-                             grpc_endpoint* secure_ep) {
+static void endpoint_destroy(grpc_endpoint* secure_ep) {
   secure_endpoint* ep = (secure_endpoint*)secure_ep;
-  SECURE_ENDPOINT_UNREF(exec_ctx, ep, "destroy");
+  SECURE_ENDPOINT_UNREF(ep, "destroy");
 }
 
-static void endpoint_add_to_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_endpoint* secure_ep,
+static void endpoint_add_to_pollset(grpc_endpoint* secure_ep,
                                     grpc_pollset* pollset) {
   secure_endpoint* ep = (secure_endpoint*)secure_ep;
-  grpc_endpoint_add_to_pollset(exec_ctx, ep->wrapped_ep, pollset);
+  grpc_endpoint_add_to_pollset(ep->wrapped_ep, pollset);
 }
 
-static void endpoint_add_to_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_endpoint* secure_ep,
+static void endpoint_add_to_pollset_set(grpc_endpoint* secure_ep,
                                         grpc_pollset_set* pollset_set) {
   secure_endpoint* ep = (secure_endpoint*)secure_ep;
-  grpc_endpoint_add_to_pollset_set(exec_ctx, ep->wrapped_ep, pollset_set);
+  grpc_endpoint_add_to_pollset_set(ep->wrapped_ep, pollset_set);
 }
 
-static void endpoint_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                             grpc_endpoint* secure_ep,
+static void endpoint_delete_from_pollset_set(grpc_endpoint* secure_ep,
                                              grpc_pollset_set* pollset_set) {
   secure_endpoint* ep = (secure_endpoint*)secure_ep;
-  grpc_endpoint_delete_from_pollset_set(exec_ctx, ep->wrapped_ep, pollset_set);
+  grpc_endpoint_delete_from_pollset_set(ep->wrapped_ep, pollset_set);
 }
 
 static char* endpoint_get_peer(grpc_endpoint* secure_ep) {
diff --git a/src/core/lib/security/transport/security_connector.cc b/src/core/lib/security/transport/security_connector.cc
index c56e459aeb..fd139714da 100644
--- a/src/core/lib/security/transport/security_connector.cc
+++ b/src/core/lib/security/transport/security_connector.cc
@@ -105,33 +105,32 @@ const tsi_peer_property* tsi_peer_get_property_by_name(const tsi_peer* peer,
 }
 
 void grpc_channel_security_connector_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* connector,
+    grpc_channel_security_connector* connector,
     grpc_handshake_manager* handshake_mgr) {
   if (connector != nullptr) {
-    connector->add_handshakers(exec_ctx, connector, handshake_mgr);
+    connector->add_handshakers(connector, handshake_mgr);
   }
 }
 
 void grpc_server_security_connector_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_server_security_connector* connector,
+    grpc_server_security_connector* connector,
     grpc_handshake_manager* handshake_mgr) {
   if (connector != nullptr) {
-    connector->add_handshakers(exec_ctx, connector, handshake_mgr);
+    connector->add_handshakers(connector, handshake_mgr);
   }
 }
 
-void grpc_security_connector_check_peer(grpc_exec_ctx* exec_ctx,
-                                        grpc_security_connector* sc,
+void grpc_security_connector_check_peer(grpc_security_connector* sc,
                                         tsi_peer peer,
                                         grpc_auth_context** auth_context,
                                         grpc_closure* on_peer_checked) {
   if (sc == nullptr) {
-    GRPC_CLOSURE_SCHED(exec_ctx, on_peer_checked,
+    GRPC_CLOSURE_SCHED(on_peer_checked,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                            "cannot check peer -- no security connector"));
     tsi_peer_destruct(&peer);
   } else {
-    sc->vtable->check_peer(exec_ctx, sc, peer, auth_context, on_peer_checked);
+    sc->vtable->check_peer(sc, peer, auth_context, on_peer_checked);
   }
 }
 
@@ -169,26 +168,26 @@ int grpc_server_security_connector_cmp(grpc_server_security_connector* sc1,
 }
 
 bool grpc_channel_security_connector_check_call_host(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
-    const char* host, grpc_auth_context* auth_context,
-    grpc_closure* on_call_host_checked, grpc_error** error) {
+    grpc_channel_security_connector* sc, const char* host,
+    grpc_auth_context* auth_context, grpc_closure* on_call_host_checked,
+    grpc_error** error) {
   if (sc == nullptr || sc->check_call_host == nullptr) {
     *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
         "cannot check call host -- no security connector");
     return true;
   }
-  return sc->check_call_host(exec_ctx, sc, host, auth_context,
-                             on_call_host_checked, error);
+  return sc->check_call_host(sc, host, auth_context, on_call_host_checked,
+                             error);
 }
 
 void grpc_channel_security_connector_cancel_check_call_host(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
-    grpc_closure* on_call_host_checked, grpc_error* error) {
+    grpc_channel_security_connector* sc, grpc_closure* on_call_host_checked,
+    grpc_error* error) {
   if (sc == nullptr || sc->cancel_check_call_host == nullptr) {
     GRPC_ERROR_UNREF(error);
     return;
   }
-  sc->cancel_check_call_host(exec_ctx, sc, on_call_host_checked, error);
+  sc->cancel_check_call_host(sc, on_call_host_checked, error);
 }
 
 #ifndef NDEBUG
@@ -205,15 +204,14 @@ grpc_security_connector* grpc_security_connector_ref(
 #else
 grpc_security_connector* grpc_security_connector_ref(
     grpc_security_connector* sc) {
-  if (sc == NULL) return NULL;
+  if (sc == nullptr) return nullptr;
 #endif
   gpr_ref(&sc->refcount);
   return sc;
 }
 
 #ifndef NDEBUG
-void grpc_security_connector_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* sc,
+void grpc_security_connector_unref(grpc_security_connector* sc,
                                    const char* file, int line,
                                    const char* reason) {
   if (sc == nullptr) return;
@@ -224,15 +222,14 @@ void grpc_security_connector_unref(grpc_exec_ctx* exec_ctx,
             val, val - 1, reason);
   }
 #else
-void grpc_security_connector_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* sc) {
-  if (sc == NULL) return;
+void grpc_security_connector_unref(grpc_security_connector* sc) {
+  if (sc == nullptr) return;
 #endif
-  if (gpr_unref(&sc->refcount)) sc->vtable->destroy(exec_ctx, sc);
+  if (gpr_unref(&sc->refcount)) sc->vtable->destroy(sc);
 }
 
-static void connector_arg_destroy(grpc_exec_ctx* exec_ctx, void* p) {
-  GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, (grpc_security_connector*)p,
+static void connector_arg_destroy(void* p) {
+  GRPC_SECURITY_CONNECTOR_UNREF((grpc_security_connector*)p,
                                 "connector_arg_destroy");
 }
 
@@ -309,20 +306,16 @@ typedef struct {
   bool is_lb_channel;
 } grpc_fake_channel_security_connector;
 
-static void fake_channel_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_security_connector* sc) {
+static void fake_channel_destroy(grpc_security_connector* sc) {
   grpc_fake_channel_security_connector* c =
       (grpc_fake_channel_security_connector*)sc;
-  grpc_call_credentials_unref(exec_ctx, c->base.request_metadata_creds);
+  grpc_call_credentials_unref(c->base.request_metadata_creds);
   gpr_free(c->target);
   gpr_free(c->expected_targets);
   gpr_free(c);
 }
 
-static void fake_server_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_security_connector* sc) {
-  gpr_free(sc);
-}
+static void fake_server_destroy(grpc_security_connector* sc) { gpr_free(sc); }
 
 static bool fake_check_target(const char* target_type, const char* target,
                               const char* set_str) {
@@ -386,8 +379,7 @@ done:
   if (!success) abort();
 }
 
-static void fake_check_peer(grpc_exec_ctx* exec_ctx,
-                            grpc_security_connector* sc, tsi_peer peer,
+static void fake_check_peer(grpc_security_connector* sc, tsi_peer peer,
                             grpc_auth_context** auth_context,
                             grpc_closure* on_peer_checked) {
   const char* prop_name;
@@ -419,25 +411,23 @@ static void fake_check_peer(grpc_exec_ctx* exec_ctx,
       *auth_context, GRPC_TRANSPORT_SECURITY_TYPE_PROPERTY_NAME,
       GRPC_FAKE_TRANSPORT_SECURITY_TYPE);
 end:
-  GRPC_CLOSURE_SCHED(exec_ctx, on_peer_checked, error);
+  GRPC_CLOSURE_SCHED(on_peer_checked, error);
   tsi_peer_destruct(&peer);
 }
 
-static void fake_channel_check_peer(grpc_exec_ctx* exec_ctx,
-                                    grpc_security_connector* sc, tsi_peer peer,
+static void fake_channel_check_peer(grpc_security_connector* sc, tsi_peer peer,
                                     grpc_auth_context** auth_context,
                                     grpc_closure* on_peer_checked) {
-  fake_check_peer(exec_ctx, sc, peer, auth_context, on_peer_checked);
+  fake_check_peer(sc, peer, auth_context, on_peer_checked);
   grpc_fake_channel_security_connector* c =
       (grpc_fake_channel_security_connector*)sc;
   fake_secure_name_check(c->target, c->expected_targets, c->is_lb_channel);
 }
 
-static void fake_server_check_peer(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* sc, tsi_peer peer,
+static void fake_server_check_peer(grpc_security_connector* sc, tsi_peer peer,
                                    grpc_auth_context** auth_context,
                                    grpc_closure* on_peer_checked) {
-  fake_check_peer(exec_ctx, sc, peer, auth_context, on_peer_checked);
+  fake_check_peer(sc, peer, auth_context, on_peer_checked);
 }
 
 static int fake_channel_cmp(grpc_security_connector* sc1,
@@ -466,8 +456,7 @@ static int fake_server_cmp(grpc_security_connector* sc1,
       (grpc_server_security_connector*)sc2);
 }
 
-static bool fake_channel_check_call_host(grpc_exec_ctx* exec_ctx,
-                                         grpc_channel_security_connector* sc,
+static bool fake_channel_check_call_host(grpc_channel_security_connector* sc,
                                          const char* host,
                                          grpc_auth_context* auth_context,
                                          grpc_closure* on_call_host_checked,
@@ -476,29 +465,26 @@ static bool fake_channel_check_call_host(grpc_exec_ctx* exec_ctx,
 }
 
 static void fake_channel_cancel_check_call_host(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
-    grpc_closure* on_call_host_checked, grpc_error* error) {
+    grpc_channel_security_connector* sc, grpc_closure* on_call_host_checked,
+    grpc_error* error) {
   GRPC_ERROR_UNREF(error);
 }
 
 static void fake_channel_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
+    grpc_channel_security_connector* sc,
     grpc_handshake_manager* handshake_mgr) {
   grpc_handshake_manager_add(
       handshake_mgr,
       grpc_security_handshaker_create(
-          exec_ctx, tsi_create_fake_handshaker(true /* is_client */),
-          &sc->base));
+          tsi_create_fake_handshaker(true /* is_client */), &sc->base));
 }
 
-static void fake_server_add_handshakers(grpc_exec_ctx* exec_ctx,
-                                        grpc_server_security_connector* sc,
+static void fake_server_add_handshakers(grpc_server_security_connector* sc,
                                         grpc_handshake_manager* handshake_mgr) {
   grpc_handshake_manager_add(
       handshake_mgr,
       grpc_security_handshaker_create(
-          exec_ctx, tsi_create_fake_handshaker(false /* is_client */),
-          &sc->base));
+          tsi_create_fake_handshaker(false /* is_client */), &sc->base));
 }
 
 static grpc_security_connector_vtable fake_channel_vtable = {
@@ -565,12 +551,11 @@ static bool server_connector_has_cert_config_fetcher(
   return server_creds->certificate_config_fetcher.cb != nullptr;
 }
 
-static void ssl_channel_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_security_connector* sc) {
+static void ssl_channel_destroy(grpc_security_connector* sc) {
   grpc_ssl_channel_security_connector* c =
       (grpc_ssl_channel_security_connector*)sc;
-  grpc_channel_credentials_unref(exec_ctx, c->base.channel_creds);
-  grpc_call_credentials_unref(exec_ctx, c->base.request_metadata_creds);
+  grpc_channel_credentials_unref(c->base.channel_creds);
+  grpc_call_credentials_unref(c->base.request_metadata_creds);
   tsi_ssl_client_handshaker_factory_unref(c->client_handshaker_factory);
   c->client_handshaker_factory = nullptr;
   if (c->target_name != nullptr) gpr_free(c->target_name);
@@ -578,18 +563,16 @@ static void ssl_channel_destroy(grpc_exec_ctx* exec_ctx,
   gpr_free(sc);
 }
 
-static void ssl_server_destroy(grpc_exec_ctx* exec_ctx,
-                               grpc_security_connector* sc) {
+static void ssl_server_destroy(grpc_security_connector* sc) {
   grpc_ssl_server_security_connector* c =
       (grpc_ssl_server_security_connector*)sc;
-  grpc_server_credentials_unref(exec_ctx, c->base.server_creds);
+  grpc_server_credentials_unref(c->base.server_creds);
   tsi_ssl_server_handshaker_factory_unref(c->server_handshaker_factory);
   c->server_handshaker_factory = nullptr;
   gpr_free(sc);
 }
 
-static void ssl_channel_add_handshakers(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_security_connector* sc,
+static void ssl_channel_add_handshakers(grpc_channel_security_connector* sc,
                                         grpc_handshake_manager* handshake_mgr) {
   grpc_ssl_channel_security_connector* c =
       (grpc_ssl_channel_security_connector*)sc;
@@ -607,9 +590,8 @@ static void ssl_channel_add_handshakers(grpc_exec_ctx* exec_ctx,
   }
   // Create handshakers.
   grpc_handshake_manager_add(
-      handshake_mgr,
-      grpc_security_handshaker_create(
-          exec_ctx, tsi_create_adapter_handshaker(tsi_hs), &sc->base));
+      handshake_mgr, grpc_security_handshaker_create(
+                         tsi_create_adapter_handshaker(tsi_hs), &sc->base));
 }
 
 static const char** fill_alpn_protocol_strings(size_t* num_alpn_protocols) {
@@ -701,8 +683,7 @@ static bool try_fetch_ssl_server_credentials(
   return status;
 }
 
-static void ssl_server_add_handshakers(grpc_exec_ctx* exec_ctx,
-                                       grpc_server_security_connector* sc,
+static void ssl_server_add_handshakers(grpc_server_security_connector* sc,
                                        grpc_handshake_manager* handshake_mgr) {
   grpc_ssl_server_security_connector* c =
       (grpc_ssl_server_security_connector*)sc;
@@ -718,9 +699,8 @@ static void ssl_server_add_handshakers(grpc_exec_ctx* exec_ctx,
   }
   // Create handshakers.
   grpc_handshake_manager_add(
-      handshake_mgr,
-      grpc_security_handshaker_create(
-          exec_ctx, tsi_create_adapter_handshaker(tsi_hs), &sc->base));
+      handshake_mgr, grpc_security_handshaker_create(
+                         tsi_create_adapter_handshaker(tsi_hs), &sc->base));
 }
 
 static int ssl_host_matches_name(const tsi_peer* peer, const char* peer_name) {
@@ -804,8 +784,7 @@ static grpc_error* ssl_check_peer(grpc_security_connector* sc,
   return GRPC_ERROR_NONE;
 }
 
-static void ssl_channel_check_peer(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* sc, tsi_peer peer,
+static void ssl_channel_check_peer(grpc_security_connector* sc, tsi_peer peer,
                                    grpc_auth_context** auth_context,
                                    grpc_closure* on_peer_checked) {
   grpc_ssl_channel_security_connector* c =
@@ -815,17 +794,16 @@ static void ssl_channel_check_peer(grpc_exec_ctx* exec_ctx,
                                          ? c->overridden_target_name
                                          : c->target_name,
                                      &peer, auth_context);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_peer_checked, error);
+  GRPC_CLOSURE_SCHED(on_peer_checked, error);
   tsi_peer_destruct(&peer);
 }
 
-static void ssl_server_check_peer(grpc_exec_ctx* exec_ctx,
-                                  grpc_security_connector* sc, tsi_peer peer,
+static void ssl_server_check_peer(grpc_security_connector* sc, tsi_peer peer,
                                   grpc_auth_context** auth_context,
                                   grpc_closure* on_peer_checked) {
   grpc_error* error = ssl_check_peer(sc, nullptr, &peer, auth_context);
   tsi_peer_destruct(&peer);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_peer_checked, error);
+  GRPC_CLOSURE_SCHED(on_peer_checked, error);
 }
 
 static int ssl_channel_cmp(grpc_security_connector* sc1,
@@ -895,8 +873,7 @@ void tsi_shallow_peer_destruct(tsi_peer* peer) {
   if (peer->properties != nullptr) gpr_free(peer->properties);
 }
 
-static bool ssl_channel_check_call_host(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_security_connector* sc,
+static bool ssl_channel_check_call_host(grpc_channel_security_connector* sc,
                                         const char* host,
                                         grpc_auth_context* auth_context,
                                         grpc_closure* on_call_host_checked,
@@ -922,8 +899,8 @@ static bool ssl_channel_check_call_host(grpc_exec_ctx* exec_ctx,
 }
 
 static void ssl_channel_cancel_check_call_host(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
-    grpc_closure* on_call_host_checked, grpc_error* error) {
+    grpc_channel_security_connector* sc, grpc_closure* on_call_host_checked,
+    grpc_error* error) {
   GRPC_ERROR_UNREF(error);
 }
 
@@ -990,7 +967,7 @@ const char* grpc_get_default_ssl_roots(void) {
 }
 
 grpc_security_status grpc_ssl_channel_security_connector_create(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* channel_creds,
+    grpc_channel_credentials* channel_creds,
     grpc_call_credentials* request_metadata_creds,
     const grpc_ssl_config* config, const char* target_name,
     const char* overridden_target_name, grpc_channel_security_connector** sc) {
@@ -1045,7 +1022,7 @@ grpc_security_status grpc_ssl_channel_security_connector_create(
   if (result != TSI_OK) {
     gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.",
             tsi_result_to_string(result));
-    ssl_channel_destroy(exec_ctx, &c->base.base);
+    ssl_channel_destroy(&c->base.base);
     *sc = nullptr;
     goto error;
   }
@@ -1073,8 +1050,7 @@ grpc_ssl_server_security_connector_initialize(
 }
 
 grpc_security_status grpc_ssl_server_security_connector_create(
-    grpc_exec_ctx* exec_ctx, grpc_server_credentials* gsc,
-    grpc_server_security_connector** sc) {
+    grpc_server_credentials* gsc, grpc_server_security_connector** sc) {
   tsi_result result = TSI_OK;
   grpc_ssl_server_credentials* server_credentials =
       (grpc_ssl_server_credentials*)gsc;
@@ -1114,7 +1090,7 @@ grpc_security_status grpc_ssl_server_security_connector_create(
   if (retval == GRPC_SECURITY_OK) {
     *sc = &c->base;
   } else {
-    if (c != nullptr) ssl_server_destroy(exec_ctx, &c->base.base);
+    if (c != nullptr) ssl_server_destroy(&c->base.base);
     if (sc != nullptr) *sc = nullptr;
   }
   return retval;
diff --git a/src/core/lib/security/transport/security_connector.h b/src/core/lib/security/transport/security_connector.h
index 03daba3a18..495821d247 100644
--- a/src/core/lib/security/transport/security_connector.h
+++ b/src/core/lib/security/transport/security_connector.h
@@ -50,9 +50,9 @@ typedef struct grpc_security_connector grpc_security_connector;
 #define GRPC_ARG_SECURITY_CONNECTOR "grpc.security_connector"
 
 typedef struct {
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_security_connector* sc);
-  void (*check_peer)(grpc_exec_ctx* exec_ctx, grpc_security_connector* sc,
-                     tsi_peer peer, grpc_auth_context** auth_context,
+  void (*destroy)(grpc_security_connector* sc);
+  void (*check_peer)(grpc_security_connector* sc, tsi_peer peer,
+                     grpc_auth_context** auth_context,
                      grpc_closure* on_peer_checked);
   int (*cmp)(grpc_security_connector* sc, grpc_security_connector* other);
 } grpc_security_connector_vtable;
@@ -67,29 +67,25 @@ struct grpc_security_connector {
 #ifndef NDEBUG
 #define GRPC_SECURITY_CONNECTOR_REF(p, r) \
   grpc_security_connector_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, p, r) \
-  grpc_security_connector_unref((exec_ctx), (p), __FILE__, __LINE__, (r))
+#define GRPC_SECURITY_CONNECTOR_UNREF(p, r) \
+  grpc_security_connector_unref((p), __FILE__, __LINE__, (r))
 grpc_security_connector* grpc_security_connector_ref(
     grpc_security_connector* policy, const char* file, int line,
     const char* reason);
-void grpc_security_connector_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* policy,
+void grpc_security_connector_unref(grpc_security_connector* policy,
                                    const char* file, int line,
                                    const char* reason);
 #else
 #define GRPC_SECURITY_CONNECTOR_REF(p, r) grpc_security_connector_ref((p))
-#define GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, p, r) \
-  grpc_security_connector_unref((exec_ctx), (p))
+#define GRPC_SECURITY_CONNECTOR_UNREF(p, r) grpc_security_connector_unref((p))
 grpc_security_connector* grpc_security_connector_ref(
     grpc_security_connector* policy);
-void grpc_security_connector_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* policy);
+void grpc_security_connector_unref(grpc_security_connector* policy);
 #endif
 
 /* Check the peer. Callee takes ownership of the peer object.
    When done, sets *auth_context and invokes on_peer_checked. */
-void grpc_security_connector_check_peer(grpc_exec_ctx* exec_ctx,
-                                        grpc_security_connector* sc,
+void grpc_security_connector_check_peer(grpc_security_connector* sc,
                                         tsi_peer peer,
                                         grpc_auth_context** auth_context,
                                         grpc_closure* on_peer_checked);
@@ -119,17 +115,14 @@ struct grpc_channel_security_connector {
   grpc_security_connector base;
   grpc_channel_credentials* channel_creds;
   grpc_call_credentials* request_metadata_creds;
-  bool (*check_call_host)(grpc_exec_ctx* exec_ctx,
-                          grpc_channel_security_connector* sc, const char* host,
+  bool (*check_call_host)(grpc_channel_security_connector* sc, const char* host,
                           grpc_auth_context* auth_context,
                           grpc_closure* on_call_host_checked,
                           grpc_error** error);
-  void (*cancel_check_call_host)(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_security_connector* sc,
+  void (*cancel_check_call_host)(grpc_channel_security_connector* sc,
                                  grpc_closure* on_call_host_checked,
                                  grpc_error* error);
-  void (*add_handshakers)(grpc_exec_ctx* exec_ctx,
-                          grpc_channel_security_connector* sc,
+  void (*add_handshakers)(grpc_channel_security_connector* sc,
                           grpc_handshake_manager* handshake_mgr);
 };
 
@@ -142,20 +135,20 @@ int grpc_channel_security_connector_cmp(grpc_channel_security_connector* sc1,
 /// be set to indicate the result.  Otherwise, \a on_call_host_checked
 /// will be invoked when complete.
 bool grpc_channel_security_connector_check_call_host(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
-    const char* host, grpc_auth_context* auth_context,
-    grpc_closure* on_call_host_checked, grpc_error** error);
+    grpc_channel_security_connector* sc, const char* host,
+    grpc_auth_context* auth_context, grpc_closure* on_call_host_checked,
+    grpc_error** error);
 
 /// Cancels a pending asychronous call to
 /// grpc_channel_security_connector_check_call_host() with
 /// \a on_call_host_checked as its callback.
 void grpc_channel_security_connector_cancel_check_call_host(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
-    grpc_closure* on_call_host_checked, grpc_error* error);
+    grpc_channel_security_connector* sc, grpc_closure* on_call_host_checked,
+    grpc_error* error);
 
 /* Registers handshakers with \a handshake_mgr. */
 void grpc_channel_security_connector_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* connector,
+    grpc_channel_security_connector* connector,
     grpc_handshake_manager* handshake_mgr);
 
 /* --- server_security_connector object. ---
@@ -168,8 +161,7 @@ typedef struct grpc_server_security_connector grpc_server_security_connector;
 struct grpc_server_security_connector {
   grpc_security_connector base;
   grpc_server_credentials* server_creds;
-  void (*add_handshakers)(grpc_exec_ctx* exec_ctx,
-                          grpc_server_security_connector* sc,
+  void (*add_handshakers)(grpc_server_security_connector* sc,
                           grpc_handshake_manager* handshake_mgr);
 };
 
@@ -178,8 +170,7 @@ int grpc_server_security_connector_cmp(grpc_server_security_connector* sc1,
                                        grpc_server_security_connector* sc2);
 
 void grpc_server_security_connector_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_server_security_connector* sc,
-    grpc_handshake_manager* handshake_mgr);
+    grpc_server_security_connector* sc, grpc_handshake_manager* handshake_mgr);
 
 /* --- Creation security connectors. --- */
 
@@ -216,7 +207,7 @@ typedef struct {
   specific error code otherwise.
 */
 grpc_security_status grpc_ssl_channel_security_connector_create(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* channel_creds,
+    grpc_channel_credentials* channel_creds,
     grpc_call_credentials* request_metadata_creds,
     const grpc_ssl_config* config, const char* target_name,
     const char* overridden_target_name, grpc_channel_security_connector** sc);
@@ -242,7 +233,7 @@ typedef struct {
   specific error code otherwise.
 */
 grpc_security_status grpc_ssl_server_security_connector_create(
-    grpc_exec_ctx* exec_ctx, grpc_server_credentials* server_credentials,
+    grpc_server_credentials* server_credentials,
     grpc_server_security_connector** sc);
 
 /* Util. */
diff --git a/src/core/lib/security/transport/security_handshaker.cc b/src/core/lib/security/transport/security_handshaker.cc
index 7067b70cb6..7623fbfd5b 100644
--- a/src/core/lib/security/transport/security_handshaker.cc
+++ b/src/core/lib/security/transport/security_handshaker.cc
@@ -65,8 +65,7 @@ typedef struct {
   tsi_handshaker_result* handshaker_result;
 } security_handshaker;
 
-static size_t move_read_buffer_into_handshake_buffer(grpc_exec_ctx* exec_ctx,
-                                                     security_handshaker* h) {
+static size_t move_read_buffer_into_handshake_buffer(security_handshaker* h) {
   size_t bytes_in_read_buffer = h->args->read_buffer->length;
   if (h->handshake_buffer_size < bytes_in_read_buffer) {
     h->handshake_buffer =
@@ -79,48 +78,45 @@ static size_t move_read_buffer_into_handshake_buffer(grpc_exec_ctx* exec_ctx,
     memcpy(h->handshake_buffer + offset, GRPC_SLICE_START_PTR(next_slice),
            GRPC_SLICE_LENGTH(next_slice));
     offset += GRPC_SLICE_LENGTH(next_slice);
-    grpc_slice_unref_internal(exec_ctx, next_slice);
+    grpc_slice_unref_internal(next_slice);
   }
   return bytes_in_read_buffer;
 }
 
-static void security_handshaker_unref(grpc_exec_ctx* exec_ctx,
-                                      security_handshaker* h) {
+static void security_handshaker_unref(security_handshaker* h) {
   if (gpr_unref(&h->refs)) {
     gpr_mu_destroy(&h->mu);
     tsi_handshaker_destroy(h->handshaker);
     tsi_handshaker_result_destroy(h->handshaker_result);
     if (h->endpoint_to_destroy != nullptr) {
-      grpc_endpoint_destroy(exec_ctx, h->endpoint_to_destroy);
+      grpc_endpoint_destroy(h->endpoint_to_destroy);
     }
     if (h->read_buffer_to_destroy != nullptr) {
-      grpc_slice_buffer_destroy_internal(exec_ctx, h->read_buffer_to_destroy);
+      grpc_slice_buffer_destroy_internal(h->read_buffer_to_destroy);
       gpr_free(h->read_buffer_to_destroy);
     }
     gpr_free(h->handshake_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &h->outgoing);
+    grpc_slice_buffer_destroy_internal(&h->outgoing);
     GRPC_AUTH_CONTEXT_UNREF(h->auth_context, "handshake");
-    GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, h->connector, "handshake");
+    GRPC_SECURITY_CONNECTOR_UNREF(h->connector, "handshake");
     gpr_free(h);
   }
 }
 
 // Set args fields to NULL, saving the endpoint and read buffer for
 // later destruction.
-static void cleanup_args_for_failure_locked(grpc_exec_ctx* exec_ctx,
-                                            security_handshaker* h) {
+static void cleanup_args_for_failure_locked(security_handshaker* h) {
   h->endpoint_to_destroy = h->args->endpoint;
   h->args->endpoint = nullptr;
   h->read_buffer_to_destroy = h->args->read_buffer;
   h->args->read_buffer = nullptr;
-  grpc_channel_args_destroy(exec_ctx, h->args->args);
+  grpc_channel_args_destroy(h->args->args);
   h->args->args = nullptr;
 }
 
 // If the handshake failed or we're shutting down, clean up and invoke the
 // callback with the error.
-static void security_handshake_failed_locked(grpc_exec_ctx* exec_ctx,
-                                             security_handshaker* h,
+static void security_handshake_failed_locked(security_handshaker* h,
                                              grpc_error* error) {
   if (error == GRPC_ERROR_NONE) {
     // If we were shut down after the handshake succeeded but before an
@@ -135,34 +131,33 @@ static void security_handshake_failed_locked(grpc_exec_ctx* exec_ctx,
     // before destroying them, even if we know that there are no
     // pending read/write callbacks.  This should be fixed, at which
     // point this can be removed.
-    grpc_endpoint_shutdown(exec_ctx, h->args->endpoint, GRPC_ERROR_REF(error));
+    grpc_endpoint_shutdown(h->args->endpoint, GRPC_ERROR_REF(error));
     // Not shutting down, so the write failed.  Clean up before
     // invoking the callback.
-    cleanup_args_for_failure_locked(exec_ctx, h);
+    cleanup_args_for_failure_locked(h);
     // Set shutdown to true so that subsequent calls to
     // security_handshaker_shutdown() do nothing.
     h->shutdown = true;
   }
   // Invoke callback.
-  GRPC_CLOSURE_SCHED(exec_ctx, h->on_handshake_done, error);
+  GRPC_CLOSURE_SCHED(h->on_handshake_done, error);
 }
 
-static void on_peer_checked_inner(grpc_exec_ctx* exec_ctx,
-                                  security_handshaker* h, grpc_error* error) {
+static void on_peer_checked_inner(security_handshaker* h, grpc_error* error) {
   if (error != GRPC_ERROR_NONE || h->shutdown) {
-    security_handshake_failed_locked(exec_ctx, h, GRPC_ERROR_REF(error));
+    security_handshake_failed_locked(h, GRPC_ERROR_REF(error));
     return;
   }
   // Create zero-copy frame protector, if implemented.
   tsi_zero_copy_grpc_protector* zero_copy_protector = nullptr;
   tsi_result result = tsi_handshaker_result_create_zero_copy_grpc_protector(
-      exec_ctx, h->handshaker_result, nullptr, &zero_copy_protector);
+      h->handshaker_result, nullptr, &zero_copy_protector);
   if (result != TSI_OK && result != TSI_UNIMPLEMENTED) {
     error = grpc_set_tsi_error_result(
         GRPC_ERROR_CREATE_FROM_STATIC_STRING(
             "Zero-copy frame protector creation failed"),
         result);
-    security_handshake_failed_locked(exec_ctx, h, error);
+    security_handshake_failed_locked(h, error);
     return;
   }
   // Create frame protector if zero-copy frame protector is NULL.
@@ -174,7 +169,7 @@ static void on_peer_checked_inner(grpc_exec_ctx* exec_ctx,
       error = grpc_set_tsi_error_result(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                                             "Frame protector creation failed"),
                                         result);
-      security_handshake_failed_locked(exec_ctx, h, error);
+      security_handshake_failed_locked(h, error);
       return;
     }
   }
@@ -189,7 +184,7 @@ static void on_peer_checked_inner(grpc_exec_ctx* exec_ctx,
         grpc_slice_from_copied_buffer((char*)unused_bytes, unused_bytes_size);
     h->args->endpoint = grpc_secure_endpoint_create(
         protector, zero_copy_protector, h->args->endpoint, &slice, 1);
-    grpc_slice_unref_internal(exec_ctx, slice);
+    grpc_slice_unref_internal(slice);
   } else {
     h->args->endpoint = grpc_secure_endpoint_create(
         protector, zero_copy_protector, h->args->endpoint, nullptr, 0);
@@ -201,25 +196,23 @@ static void on_peer_checked_inner(grpc_exec_ctx* exec_ctx,
   grpc_channel_args* tmp_args = h->args->args;
   h->args->args =
       grpc_channel_args_copy_and_add(tmp_args, &auth_context_arg, 1);
-  grpc_channel_args_destroy(exec_ctx, tmp_args);
+  grpc_channel_args_destroy(tmp_args);
   // Invoke callback.
-  GRPC_CLOSURE_SCHED(exec_ctx, h->on_handshake_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(h->on_handshake_done, GRPC_ERROR_NONE);
   // Set shutdown to true so that subsequent calls to
   // security_handshaker_shutdown() do nothing.
   h->shutdown = true;
 }
 
-static void on_peer_checked(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void on_peer_checked(void* arg, grpc_error* error) {
   security_handshaker* h = (security_handshaker*)arg;
   gpr_mu_lock(&h->mu);
-  on_peer_checked_inner(exec_ctx, h, error);
+  on_peer_checked_inner(h, error);
   gpr_mu_unlock(&h->mu);
-  security_handshaker_unref(exec_ctx, h);
+  security_handshaker_unref(h);
 }
 
-static grpc_error* check_peer_locked(grpc_exec_ctx* exec_ctx,
-                                     security_handshaker* h) {
+static grpc_error* check_peer_locked(security_handshaker* h) {
   tsi_peer peer;
   tsi_result result =
       tsi_handshaker_result_extract_peer(h->handshaker_result, &peer);
@@ -227,20 +220,20 @@ static grpc_error* check_peer_locked(grpc_exec_ctx* exec_ctx,
     return grpc_set_tsi_error_result(
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Peer extraction failed"), result);
   }
-  grpc_security_connector_check_peer(exec_ctx, h->connector, peer,
-                                     &h->auth_context, &h->on_peer_checked);
+  grpc_security_connector_check_peer(h->connector, peer, &h->auth_context,
+                                     &h->on_peer_checked);
   return GRPC_ERROR_NONE;
 }
 
 static grpc_error* on_handshake_next_done_locked(
-    grpc_exec_ctx* exec_ctx, security_handshaker* h, tsi_result result,
+    security_handshaker* h, tsi_result result,
     const unsigned char* bytes_to_send, size_t bytes_to_send_size,
     tsi_handshaker_result* handshaker_result) {
   grpc_error* error = GRPC_ERROR_NONE;
   // Read more if we need to.
   if (result == TSI_INCOMPLETE_DATA) {
     GPR_ASSERT(bytes_to_send_size == 0);
-    grpc_endpoint_read(exec_ctx, h->args->endpoint, h->args->read_buffer,
+    grpc_endpoint_read(h->args->endpoint, h->args->read_buffer,
                        &h->on_handshake_data_received_from_peer);
     return error;
   }
@@ -257,17 +250,17 @@ static grpc_error* on_handshake_next_done_locked(
     // Send data to peer, if needed.
     grpc_slice to_send = grpc_slice_from_copied_buffer(
         (const char*)bytes_to_send, bytes_to_send_size);
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &h->outgoing);
+    grpc_slice_buffer_reset_and_unref_internal(&h->outgoing);
     grpc_slice_buffer_add(&h->outgoing, to_send);
-    grpc_endpoint_write(exec_ctx, h->args->endpoint, &h->outgoing,
+    grpc_endpoint_write(h->args->endpoint, &h->outgoing,
                         &h->on_handshake_data_sent_to_peer);
   } else if (handshaker_result == nullptr) {
     // There is nothing to send, but need to read from peer.
-    grpc_endpoint_read(exec_ctx, h->args->endpoint, h->args->read_buffer,
+    grpc_endpoint_read(h->args->endpoint, h->args->read_buffer,
                        &h->on_handshake_data_received_from_peer);
   } else {
     // Handshake has finished, check peer and so on.
-    error = check_peer_locked(exec_ctx, h);
+    error = check_peer_locked(h);
   }
   return error;
 }
@@ -278,24 +271,22 @@ static void on_handshake_next_done_grpc_wrapper(
   security_handshaker* h = (security_handshaker*)user_data;
   // This callback will be invoked by TSI in a non-grpc thread, so it's
   // safe to create our own exec_ctx here.
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_mu_lock(&h->mu);
-  grpc_error* error =
-      on_handshake_next_done_locked(&exec_ctx, h, result, bytes_to_send,
-                                    bytes_to_send_size, handshaker_result);
+  grpc_error* error = on_handshake_next_done_locked(
+      h, result, bytes_to_send, bytes_to_send_size, handshaker_result);
   if (error != GRPC_ERROR_NONE) {
-    security_handshake_failed_locked(&exec_ctx, h, error);
+    security_handshake_failed_locked(h, error);
     gpr_mu_unlock(&h->mu);
-    security_handshaker_unref(&exec_ctx, h);
+    security_handshaker_unref(h);
   } else {
     gpr_mu_unlock(&h->mu);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static grpc_error* do_handshaker_next_locked(
-    grpc_exec_ctx* exec_ctx, security_handshaker* h,
-    const unsigned char* bytes_received, size_t bytes_received_size) {
+    security_handshaker* h, const unsigned char* bytes_received,
+    size_t bytes_received_size) {
   // Invoke TSI handshaker.
   const unsigned char* bytes_to_send = nullptr;
   size_t bytes_to_send_size = 0;
@@ -311,62 +302,57 @@ static grpc_error* do_handshaker_next_locked(
   }
   // Handshaker returned synchronously. Invoke callback directly in
   // this thread with our existing exec_ctx.
-  return on_handshake_next_done_locked(exec_ctx, h, result, bytes_to_send,
+  return on_handshake_next_done_locked(h, result, bytes_to_send,
                                        bytes_to_send_size, handshaker_result);
 }
 
-static void on_handshake_data_received_from_peer(grpc_exec_ctx* exec_ctx,
-                                                 void* arg, grpc_error* error) {
+static void on_handshake_data_received_from_peer(void* arg, grpc_error* error) {
   security_handshaker* h = (security_handshaker*)arg;
   gpr_mu_lock(&h->mu);
   if (error != GRPC_ERROR_NONE || h->shutdown) {
     security_handshake_failed_locked(
-        exec_ctx, h,
-        GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-            "Handshake read failed", &error, 1));
+        h, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+               "Handshake read failed", &error, 1));
     gpr_mu_unlock(&h->mu);
-    security_handshaker_unref(exec_ctx, h);
+    security_handshaker_unref(h);
     return;
   }
   // Copy all slices received.
-  size_t bytes_received_size =
-      move_read_buffer_into_handshake_buffer(exec_ctx, h);
+  size_t bytes_received_size = move_read_buffer_into_handshake_buffer(h);
   // Call TSI handshaker.
-  error = do_handshaker_next_locked(exec_ctx, h, h->handshake_buffer,
-                                    bytes_received_size);
+  error =
+      do_handshaker_next_locked(h, h->handshake_buffer, bytes_received_size);
 
   if (error != GRPC_ERROR_NONE) {
-    security_handshake_failed_locked(exec_ctx, h, error);
+    security_handshake_failed_locked(h, error);
     gpr_mu_unlock(&h->mu);
-    security_handshaker_unref(exec_ctx, h);
+    security_handshaker_unref(h);
   } else {
     gpr_mu_unlock(&h->mu);
   }
 }
 
-static void on_handshake_data_sent_to_peer(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void on_handshake_data_sent_to_peer(void* arg, grpc_error* error) {
   security_handshaker* h = (security_handshaker*)arg;
   gpr_mu_lock(&h->mu);
   if (error != GRPC_ERROR_NONE || h->shutdown) {
     security_handshake_failed_locked(
-        exec_ctx, h,
-        GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-            "Handshake write failed", &error, 1));
+        h, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+               "Handshake write failed", &error, 1));
     gpr_mu_unlock(&h->mu);
-    security_handshaker_unref(exec_ctx, h);
+    security_handshaker_unref(h);
     return;
   }
   // We may be done.
   if (h->handshaker_result == nullptr) {
-    grpc_endpoint_read(exec_ctx, h->args->endpoint, h->args->read_buffer,
+    grpc_endpoint_read(h->args->endpoint, h->args->read_buffer,
                        &h->on_handshake_data_received_from_peer);
   } else {
-    error = check_peer_locked(exec_ctx, h);
+    error = check_peer_locked(h);
     if (error != GRPC_ERROR_NONE) {
-      security_handshake_failed_locked(exec_ctx, h, error);
+      security_handshake_failed_locked(h, error);
       gpr_mu_unlock(&h->mu);
-      security_handshaker_unref(exec_ctx, h);
+      security_handshaker_unref(h);
       return;
     }
   }
@@ -377,28 +363,25 @@ static void on_handshake_data_sent_to_peer(grpc_exec_ctx* exec_ctx, void* arg,
 // public handshaker API
 //
 
-static void security_handshaker_destroy(grpc_exec_ctx* exec_ctx,
-                                        grpc_handshaker* handshaker) {
+static void security_handshaker_destroy(grpc_handshaker* handshaker) {
   security_handshaker* h = (security_handshaker*)handshaker;
-  security_handshaker_unref(exec_ctx, h);
+  security_handshaker_unref(h);
 }
 
-static void security_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
-                                         grpc_handshaker* handshaker,
+static void security_handshaker_shutdown(grpc_handshaker* handshaker,
                                          grpc_error* why) {
   security_handshaker* h = (security_handshaker*)handshaker;
   gpr_mu_lock(&h->mu);
   if (!h->shutdown) {
     h->shutdown = true;
-    grpc_endpoint_shutdown(exec_ctx, h->args->endpoint, GRPC_ERROR_REF(why));
-    cleanup_args_for_failure_locked(exec_ctx, h);
+    grpc_endpoint_shutdown(h->args->endpoint, GRPC_ERROR_REF(why));
+    cleanup_args_for_failure_locked(h);
   }
   gpr_mu_unlock(&h->mu);
   GRPC_ERROR_UNREF(why);
 }
 
-static void security_handshaker_do_handshake(grpc_exec_ctx* exec_ctx,
-                                             grpc_handshaker* handshaker,
+static void security_handshaker_do_handshake(grpc_handshaker* handshaker,
                                              grpc_tcp_server_acceptor* acceptor,
                                              grpc_closure* on_handshake_done,
                                              grpc_handshaker_args* args) {
@@ -407,14 +390,13 @@ static void security_handshaker_do_handshake(grpc_exec_ctx* exec_ctx,
   h->args = args;
   h->on_handshake_done = on_handshake_done;
   gpr_ref(&h->refs);
-  size_t bytes_received_size =
-      move_read_buffer_into_handshake_buffer(exec_ctx, h);
-  grpc_error* error = do_handshaker_next_locked(
-      exec_ctx, h, h->handshake_buffer, bytes_received_size);
+  size_t bytes_received_size = move_read_buffer_into_handshake_buffer(h);
+  grpc_error* error =
+      do_handshaker_next_locked(h, h->handshake_buffer, bytes_received_size);
   if (error != GRPC_ERROR_NONE) {
-    security_handshake_failed_locked(exec_ctx, h, error);
+    security_handshake_failed_locked(h, error);
     gpr_mu_unlock(&h->mu);
-    security_handshaker_unref(exec_ctx, h);
+    security_handshaker_unref(h);
     return;
   }
   gpr_mu_unlock(&h->mu);
@@ -425,8 +407,7 @@ static const grpc_handshaker_vtable security_handshaker_vtable = {
     security_handshaker_do_handshake};
 
 static grpc_handshaker* security_handshaker_create(
-    grpc_exec_ctx* exec_ctx, tsi_handshaker* handshaker,
-    grpc_security_connector* connector) {
+    tsi_handshaker* handshaker, grpc_security_connector* connector) {
   security_handshaker* h =
       (security_handshaker*)gpr_zalloc(sizeof(security_handshaker));
   grpc_handshaker_init(&security_handshaker_vtable, &h->base);
@@ -452,23 +433,20 @@ static grpc_handshaker* security_handshaker_create(
 // fail_handshaker
 //
 
-static void fail_handshaker_destroy(grpc_exec_ctx* exec_ctx,
-                                    grpc_handshaker* handshaker) {
+static void fail_handshaker_destroy(grpc_handshaker* handshaker) {
   gpr_free(handshaker);
 }
 
-static void fail_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
-                                     grpc_handshaker* handshaker,
+static void fail_handshaker_shutdown(grpc_handshaker* handshaker,
                                      grpc_error* why) {
   GRPC_ERROR_UNREF(why);
 }
 
-static void fail_handshaker_do_handshake(grpc_exec_ctx* exec_ctx,
-                                         grpc_handshaker* handshaker,
+static void fail_handshaker_do_handshake(grpc_handshaker* handshaker,
                                          grpc_tcp_server_acceptor* acceptor,
                                          grpc_closure* on_handshake_done,
                                          grpc_handshaker_args* args) {
-  GRPC_CLOSURE_SCHED(exec_ctx, on_handshake_done,
+  GRPC_CLOSURE_SCHED(on_handshake_done,
                      GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                          "Failed to create security handshaker"));
 }
@@ -488,27 +466,27 @@ static grpc_handshaker* fail_handshaker_create() {
 //
 
 static void client_handshaker_factory_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr) {
+    grpc_handshaker_factory* handshaker_factory, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr) {
   grpc_channel_security_connector* security_connector =
       (grpc_channel_security_connector*)grpc_security_connector_find_in_args(
           args);
-  grpc_channel_security_connector_add_handshakers(exec_ctx, security_connector,
+  grpc_channel_security_connector_add_handshakers(security_connector,
                                                   handshake_mgr);
 }
 
 static void server_handshaker_factory_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* hf,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr) {
+    grpc_handshaker_factory* hf, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr) {
   grpc_server_security_connector* security_connector =
       (grpc_server_security_connector*)grpc_security_connector_find_in_args(
           args);
-  grpc_server_security_connector_add_handshakers(exec_ctx, security_connector,
+  grpc_server_security_connector_add_handshakers(security_connector,
                                                  handshake_mgr);
 }
 
 static void handshaker_factory_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory) {}
+    grpc_handshaker_factory* handshaker_factory) {}
 
 static const grpc_handshaker_factory_vtable client_handshaker_factory_vtable = {
     client_handshaker_factory_add_handshakers, handshaker_factory_destroy};
@@ -527,14 +505,13 @@ static grpc_handshaker_factory server_handshaker_factory = {
 //
 
 grpc_handshaker* grpc_security_handshaker_create(
-    grpc_exec_ctx* exec_ctx, tsi_handshaker* handshaker,
-    grpc_security_connector* connector) {
+    tsi_handshaker* handshaker, grpc_security_connector* connector) {
   // If no TSI handshaker was created, return a handshaker that always fails.
   // Otherwise, return a real security handshaker.
   if (handshaker == nullptr) {
     return fail_handshaker_create();
   } else {
-    return security_handshaker_create(exec_ctx, handshaker, connector);
+    return security_handshaker_create(handshaker, connector);
   }
 }
 
diff --git a/src/core/lib/security/transport/security_handshaker.h b/src/core/lib/security/transport/security_handshaker.h
index 6c3a0510ce..6cd6446b5a 100644
--- a/src/core/lib/security/transport/security_handshaker.h
+++ b/src/core/lib/security/transport/security_handshaker.h
@@ -25,8 +25,7 @@
 
 /// Creates a security handshaker using \a handshaker.
 grpc_handshaker* grpc_security_handshaker_create(
-    grpc_exec_ctx* exec_ctx, tsi_handshaker* handshaker,
-    grpc_security_connector* connector);
+    tsi_handshaker* handshaker, grpc_security_connector* connector);
 
 /// Registers security handshaker factories.
 void grpc_security_register_handshaker_factories();
diff --git a/src/core/lib/security/transport/server_auth_filter.cc b/src/core/lib/security/transport/server_auth_filter.cc
index 9cf368acd0..73653f2a66 100644
--- a/src/core/lib/security/transport/server_auth_filter.cc
+++ b/src/core/lib/security/transport/server_auth_filter.cc
@@ -73,8 +73,7 @@ static grpc_metadata_array metadata_batch_to_md_array(
   return result;
 }
 
-static grpc_filtered_mdelem remove_consumed_md(grpc_exec_ctx* exec_ctx,
-                                               void* user_data,
+static grpc_filtered_mdelem remove_consumed_md(void* user_data,
                                                grpc_mdelem md) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -88,8 +87,7 @@ static grpc_filtered_mdelem remove_consumed_md(grpc_exec_ctx* exec_ctx,
   return GRPC_FILTERED_MDELEM(md);
 }
 
-static void on_md_processing_done_inner(grpc_exec_ctx* exec_ctx,
-                                        grpc_call_element* elem,
+static void on_md_processing_done_inner(grpc_call_element* elem,
                                         const grpc_metadata* consumed_md,
                                         size_t num_consumed_md,
                                         const grpc_metadata* response_md,
@@ -107,11 +105,10 @@ static void on_md_processing_done_inner(grpc_exec_ctx* exec_ctx,
     calld->consumed_md = consumed_md;
     calld->num_consumed_md = num_consumed_md;
     error = grpc_metadata_batch_filter(
-        exec_ctx, batch->payload->recv_initial_metadata.recv_initial_metadata,
+        batch->payload->recv_initial_metadata.recv_initial_metadata,
         remove_consumed_md, elem, "Response metadata filtering error");
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, calld->original_recv_initial_metadata_ready,
-                     error);
+  GRPC_CLOSURE_SCHED(calld->original_recv_initial_metadata_ready, error);
 }
 
 // Called from application code.
@@ -121,7 +118,7 @@ static void on_md_processing_done(
     grpc_status_code status, const char* error_details) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   // If the call was not cancelled while we were in flight, process the result.
   if (gpr_atm_full_cas(&calld->state, (gpr_atm)STATE_INIT,
                        (gpr_atm)STATE_DONE)) {
@@ -134,34 +131,32 @@ static void on_md_processing_done(
           GRPC_ERROR_CREATE_FROM_COPIED_STRING(error_details),
           GRPC_ERROR_INT_GRPC_STATUS, status);
     }
-    on_md_processing_done_inner(&exec_ctx, elem, consumed_md, num_consumed_md,
-                                response_md, num_response_md, error);
+    on_md_processing_done_inner(elem, consumed_md, num_consumed_md, response_md,
+                                num_response_md, error);
   }
   // Clean up.
   for (size_t i = 0; i < calld->md.count; i++) {
-    grpc_slice_unref_internal(&exec_ctx, calld->md.metadata[i].key);
-    grpc_slice_unref_internal(&exec_ctx, calld->md.metadata[i].value);
+    grpc_slice_unref_internal(calld->md.metadata[i].key);
+    grpc_slice_unref_internal(calld->md.metadata[i].value);
   }
   grpc_metadata_array_destroy(&calld->md);
-  GRPC_CALL_STACK_UNREF(&exec_ctx, calld->owning_call, "server_auth_metadata");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CALL_STACK_UNREF(calld->owning_call, "server_auth_metadata");
 }
 
-static void cancel_call(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void cancel_call(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   // If the result was not already processed, invoke the callback now.
   if (error != GRPC_ERROR_NONE &&
       gpr_atm_full_cas(&calld->state, (gpr_atm)STATE_INIT,
                        (gpr_atm)STATE_CANCELLED)) {
-    on_md_processing_done_inner(exec_ctx, elem, nullptr, 0, nullptr, 0,
+    on_md_processing_done_inner(elem, nullptr, 0, nullptr, 0,
                                 GRPC_ERROR_REF(error));
   }
-  GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "cancel_call");
+  GRPC_CALL_STACK_UNREF(calld->owning_call, "cancel_call");
 }
 
-static void recv_initial_metadata_ready(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void recv_initial_metadata_ready(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -173,7 +168,7 @@ static void recv_initial_metadata_ready(grpc_exec_ctx* exec_ctx, void* arg,
       GRPC_CALL_STACK_REF(calld->owning_call, "cancel_call");
       GRPC_CLOSURE_INIT(&calld->cancel_closure, cancel_call, elem,
                         grpc_schedule_on_exec_ctx);
-      grpc_call_combiner_set_notify_on_cancel(exec_ctx, calld->call_combiner,
+      grpc_call_combiner_set_notify_on_cancel(calld->call_combiner,
                                               &calld->cancel_closure);
       GRPC_CALL_STACK_REF(calld->owning_call, "server_auth_metadata");
       calld->md = metadata_batch_to_md_array(
@@ -184,13 +179,12 @@ static void recv_initial_metadata_ready(grpc_exec_ctx* exec_ctx, void* arg,
       return;
     }
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_recv_initial_metadata_ready,
+  GRPC_CLOSURE_RUN(calld->original_recv_initial_metadata_ready,
                    GRPC_ERROR_REF(error));
 }
 
 static void auth_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   if (batch->recv_initial_metadata) {
     // Inject our callback.
@@ -200,12 +194,11 @@ static void auth_start_transport_stream_op_batch(
     batch->payload->recv_initial_metadata.recv_initial_metadata_ready =
         &calld->recv_initial_metadata_ready;
   }
-  grpc_call_next_op(exec_ctx, elem, batch);
+  grpc_call_next_op(elem, batch);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -231,13 +224,12 @@ static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -253,11 +245,10 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
 }
 
 /* Destructor for channel data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   GRPC_AUTH_CONTEXT_UNREF(chand->auth_context, "server_auth_filter");
-  grpc_server_credentials_unref(exec_ctx, chand->creds);
+  grpc_server_credentials_unref(chand->creds);
 }
 
 const grpc_channel_filter grpc_server_auth_filter = {
diff --git a/src/core/lib/slice/b64.cc b/src/core/lib/slice/b64.cc
index fe7a86ef84..f36b13ef1b 100644
--- a/src/core/lib/slice/b64.cc
+++ b/src/core/lib/slice/b64.cc
@@ -122,9 +122,8 @@ void grpc_base64_encode_core(char* result, const void* vdata, size_t data_size,
   result[current - result] = '\0';
 }
 
-grpc_slice grpc_base64_decode(grpc_exec_ctx* exec_ctx, const char* b64,
-                              int url_safe) {
-  return grpc_base64_decode_with_len(exec_ctx, b64, strlen(b64), url_safe);
+grpc_slice grpc_base64_decode(const char* b64, int url_safe) {
+  return grpc_base64_decode_with_len(b64, strlen(b64), url_safe);
 }
 
 static void decode_one_char(const unsigned char* codes, unsigned char* result,
@@ -185,8 +184,8 @@ static int decode_group(const unsigned char* codes, size_t num_codes,
   return 1;
 }
 
-grpc_slice grpc_base64_decode_with_len(grpc_exec_ctx* exec_ctx, const char* b64,
-                                       size_t b64_len, int url_safe) {
+grpc_slice grpc_base64_decode_with_len(const char* b64, size_t b64_len,
+                                       int url_safe) {
   grpc_slice result = GRPC_SLICE_MALLOC(b64_len);
   unsigned char* current = GRPC_SLICE_START_PTR(result);
   size_t result_size = 0;
@@ -231,6 +230,6 @@ grpc_slice grpc_base64_decode_with_len(grpc_exec_ctx* exec_ctx, const char* b64,
   return result;
 
 fail:
-  grpc_slice_unref_internal(exec_ctx, result);
+  grpc_slice_unref_internal(result);
   return grpc_empty_slice();
 }
diff --git a/src/core/lib/slice/b64.h b/src/core/lib/slice/b64.h
index f86c1d9901..17e7306303 100644
--- a/src/core/lib/slice/b64.h
+++ b/src/core/lib/slice/b64.h
@@ -40,11 +40,10 @@ void grpc_base64_encode_core(char* result, const void* vdata, size_t data_size,
 
 /* Decodes data according to the base64 specification. Returns an empty
    slice in case of failure. */
-grpc_slice grpc_base64_decode(grpc_exec_ctx* exec_ctx, const char* b64,
-                              int url_safe);
+grpc_slice grpc_base64_decode(const char* b64, int url_safe);
 
 /* Same as above except that the length is provided by the caller. */
-grpc_slice grpc_base64_decode_with_len(grpc_exec_ctx* exec_ctx, const char* b64,
-                                       size_t b64_len, int url_safe);
+grpc_slice grpc_base64_decode_with_len(const char* b64, size_t b64_len,
+                                       int url_safe);
 
 #endif /* GRPC_CORE_LIB_SLICE_B64_H */
diff --git a/src/core/lib/slice/slice.cc b/src/core/lib/slice/slice.cc
index bbaf87ba23..1eb15290eb 100644
--- a/src/core/lib/slice/slice.cc
+++ b/src/core/lib/slice/slice.cc
@@ -54,9 +54,9 @@ grpc_slice grpc_slice_ref_internal(grpc_slice slice) {
   return slice;
 }
 
-void grpc_slice_unref_internal(grpc_exec_ctx* exec_ctx, grpc_slice slice) {
+void grpc_slice_unref_internal(grpc_slice slice) {
   if (slice.refcount) {
-    slice.refcount->vtable->unref(exec_ctx, slice.refcount);
+    slice.refcount->vtable->unref(slice.refcount);
   }
 }
 
@@ -67,15 +67,14 @@ grpc_slice grpc_slice_ref(grpc_slice slice) {
 
 /* Public API */
 void grpc_slice_unref(grpc_slice slice) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_unref_internal(&exec_ctx, slice);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_unref_internal(slice);
 }
 
 /* grpc_slice_from_static_string support structure - a refcount that does
    nothing */
 static void noop_ref(void* unused) {}
-static void noop_unref(grpc_exec_ctx* exec_ctx, void* unused) {}
+static void noop_unref(void* unused) {}
 
 static const grpc_slice_refcount_vtable noop_refcount_vtable = {
     noop_ref, noop_unref, grpc_slice_default_eq_impl,
@@ -109,7 +108,7 @@ static void new_slice_ref(void* p) {
   gpr_ref(&r->refs);
 }
 
-static void new_slice_unref(grpc_exec_ctx* exec_ctx, void* p) {
+static void new_slice_unref(void* p) {
   new_slice_refcount* r = (new_slice_refcount*)p;
   if (gpr_unref(&r->refs)) {
     r->user_destroy(r->user_data);
@@ -159,7 +158,7 @@ static void new_with_len_ref(void* p) {
   gpr_ref(&r->refs);
 }
 
-static void new_with_len_unref(grpc_exec_ctx* exec_ctx, void* p) {
+static void new_with_len_unref(void* p) {
   new_with_len_slice_refcount* r = (new_with_len_slice_refcount*)p;
   if (gpr_unref(&r->refs)) {
     r->user_destroy(r->user_data, r->user_length);
@@ -210,7 +209,7 @@ static void malloc_ref(void* p) {
   gpr_ref(&r->refs);
 }
 
-static void malloc_unref(grpc_exec_ctx* exec_ctx, void* p) {
+static void malloc_unref(void* p) {
   malloc_refcount* r = (malloc_refcount*)p;
   if (gpr_unref(&r->refs)) {
     gpr_free(r);
diff --git a/src/core/lib/slice/slice_buffer.cc b/src/core/lib/slice/slice_buffer.cc
index 5db54dad91..33ec2af683 100644
--- a/src/core/lib/slice/slice_buffer.cc
+++ b/src/core/lib/slice/slice_buffer.cc
@@ -65,18 +65,16 @@ void grpc_slice_buffer_init(grpc_slice_buffer* sb) {
   sb->base_slices = sb->slices = sb->inlined;
 }
 
-void grpc_slice_buffer_destroy_internal(grpc_exec_ctx* exec_ctx,
-                                        grpc_slice_buffer* sb) {
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, sb);
+void grpc_slice_buffer_destroy_internal(grpc_slice_buffer* sb) {
+  grpc_slice_buffer_reset_and_unref_internal(sb);
   if (sb->base_slices != sb->inlined) {
     gpr_free(sb->base_slices);
   }
 }
 
 void grpc_slice_buffer_destroy(grpc_slice_buffer* sb) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_buffer_destroy_internal(&exec_ctx, sb);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_buffer_destroy_internal(sb);
 }
 
 uint8_t* grpc_slice_buffer_tiny_add(grpc_slice_buffer* sb, size_t n) {
@@ -163,11 +161,10 @@ void grpc_slice_buffer_pop(grpc_slice_buffer* sb) {
   }
 }
 
-void grpc_slice_buffer_reset_and_unref_internal(grpc_exec_ctx* exec_ctx,
-                                                grpc_slice_buffer* sb) {
+void grpc_slice_buffer_reset_and_unref_internal(grpc_slice_buffer* sb) {
   size_t i;
   for (i = 0; i < sb->count; i++) {
-    grpc_slice_unref_internal(exec_ctx, sb->slices[i]);
+    grpc_slice_unref_internal(sb->slices[i]);
   }
 
   sb->count = 0;
@@ -175,9 +172,8 @@ void grpc_slice_buffer_reset_and_unref_internal(grpc_exec_ctx* exec_ctx,
 }
 
 void grpc_slice_buffer_reset_and_unref(grpc_slice_buffer* sb) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_buffer_reset_and_unref_internal(&exec_ctx, sb);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_buffer_reset_and_unref_internal(sb);
 }
 
 void grpc_slice_buffer_swap(grpc_slice_buffer* a, grpc_slice_buffer* b) {
@@ -289,8 +285,7 @@ void grpc_slice_buffer_move_first_no_ref(grpc_slice_buffer* src, size_t n,
   slice_buffer_move_first_maybe_ref(src, n, dst, false);
 }
 
-void grpc_slice_buffer_move_first_into_buffer(grpc_exec_ctx* exec_ctx,
-                                              grpc_slice_buffer* src, size_t n,
+void grpc_slice_buffer_move_first_into_buffer(grpc_slice_buffer* src, size_t n,
                                               void* dst) {
   char* dstp = (char*)dst;
   GPR_ASSERT(src->length >= n);
@@ -305,13 +300,13 @@ void grpc_slice_buffer_move_first_into_buffer(grpc_exec_ctx* exec_ctx,
       n = 0;
     } else if (slice_len == n) {
       memcpy(dstp, GRPC_SLICE_START_PTR(slice), n);
-      grpc_slice_unref_internal(exec_ctx, slice);
+      grpc_slice_unref_internal(slice);
       n = 0;
     } else {
       memcpy(dstp, GRPC_SLICE_START_PTR(slice), slice_len);
       dstp += slice_len;
       n -= slice_len;
-      grpc_slice_unref_internal(exec_ctx, slice);
+      grpc_slice_unref_internal(slice);
     }
   }
 }
diff --git a/src/core/lib/slice/slice_hash_table.cc b/src/core/lib/slice/slice_hash_table.cc
index 8f8e5a6b34..89340eff84 100644
--- a/src/core/lib/slice/slice_hash_table.cc
+++ b/src/core/lib/slice/slice_hash_table.cc
@@ -27,7 +27,7 @@
 
 struct grpc_slice_hash_table {
   gpr_refcount refs;
-  void (*destroy_value)(grpc_exec_ctx* exec_ctx, void* value);
+  void (*destroy_value)(void* value);
   int (*value_cmp)(void* a, void* b);
   size_t size;
   size_t max_num_probes;
@@ -58,8 +58,7 @@ static void grpc_slice_hash_table_add(grpc_slice_hash_table* table,
 
 grpc_slice_hash_table* grpc_slice_hash_table_create(
     size_t num_entries, grpc_slice_hash_table_entry* entries,
-    void (*destroy_value)(grpc_exec_ctx* exec_ctx, void* value),
-    int (*value_cmp)(void* a, void* b)) {
+    void (*destroy_value)(void* value), int (*value_cmp)(void* a, void* b)) {
   grpc_slice_hash_table* table =
       (grpc_slice_hash_table*)gpr_zalloc(sizeof(*table));
   gpr_ref_init(&table->refs, 1);
@@ -81,14 +80,13 @@ grpc_slice_hash_table* grpc_slice_hash_table_ref(grpc_slice_hash_table* table) {
   return table;
 }
 
-void grpc_slice_hash_table_unref(grpc_exec_ctx* exec_ctx,
-                                 grpc_slice_hash_table* table) {
+void grpc_slice_hash_table_unref(grpc_slice_hash_table* table) {
   if (table != nullptr && gpr_unref(&table->refs)) {
     for (size_t i = 0; i < table->size; ++i) {
       grpc_slice_hash_table_entry* entry = &table->entries[i];
       if (!is_empty(entry)) {
-        grpc_slice_unref_internal(exec_ctx, entry->key);
-        table->destroy_value(exec_ctx, entry->value);
+        grpc_slice_unref_internal(entry->key);
+        table->destroy_value(entry->value);
       }
     }
     gpr_free(table->entries);
diff --git a/src/core/lib/slice/slice_hash_table.h b/src/core/lib/slice/slice_hash_table.h
index 85102bd67d..db69da662a 100644
--- a/src/core/lib/slice/slice_hash_table.h
+++ b/src/core/lib/slice/slice_hash_table.h
@@ -46,12 +46,10 @@ typedef struct grpc_slice_hash_table_entry {
     will be used. */
 grpc_slice_hash_table* grpc_slice_hash_table_create(
     size_t num_entries, grpc_slice_hash_table_entry* entries,
-    void (*destroy_value)(grpc_exec_ctx* exec_ctx, void* value),
-    int (*value_cmp)(void* a, void* b));
+    void (*destroy_value)(void* value), int (*value_cmp)(void* a, void* b));
 
 grpc_slice_hash_table* grpc_slice_hash_table_ref(grpc_slice_hash_table* table);
-void grpc_slice_hash_table_unref(grpc_exec_ctx* exec_ctx,
-                                 grpc_slice_hash_table* table);
+void grpc_slice_hash_table_unref(grpc_slice_hash_table* table);
 
 /** Returns the value from \a table associated with \a key.
     Returns NULL if \a key is not found. */
diff --git a/src/core/lib/slice/slice_intern.cc b/src/core/lib/slice/slice_intern.cc
index e8949135c0..c578c6d9de 100644
--- a/src/core/lib/slice/slice_intern.cc
+++ b/src/core/lib/slice/slice_intern.cc
@@ -90,7 +90,7 @@ static void interned_slice_destroy(interned_slice_refcount* s) {
   gpr_mu_unlock(&shard->mu);
 }
 
-static void interned_slice_unref(grpc_exec_ctx* exec_ctx, void* p) {
+static void interned_slice_unref(void* p) {
   interned_slice_refcount* s = (interned_slice_refcount*)p;
   if (1 == gpr_atm_full_fetch_add(&s->refcnt, -1)) {
     interned_slice_destroy(s);
@@ -101,9 +101,8 @@ static void interned_slice_sub_ref(void* p) {
   interned_slice_ref(((char*)p) - offsetof(interned_slice_refcount, sub));
 }
 
-static void interned_slice_sub_unref(grpc_exec_ctx* exec_ctx, void* p) {
-  interned_slice_unref(exec_ctx,
-                       ((char*)p) - offsetof(interned_slice_refcount, sub));
+static void interned_slice_sub_unref(void* p) {
+  interned_slice_unref(((char*)p) - offsetof(interned_slice_refcount, sub));
 }
 
 static uint32_t interned_slice_hash(grpc_slice slice) {
diff --git a/src/core/lib/slice/slice_internal.h b/src/core/lib/slice/slice_internal.h
index ed0070d375..4e9ab80261 100644
--- a/src/core/lib/slice/slice_internal.h
+++ b/src/core/lib/slice/slice_internal.h
@@ -25,14 +25,11 @@
 #include "src/core/lib/iomgr/exec_ctx.h"
 
 grpc_slice grpc_slice_ref_internal(grpc_slice slice);
-void grpc_slice_unref_internal(grpc_exec_ctx* exec_ctx, grpc_slice slice);
-void grpc_slice_buffer_reset_and_unref_internal(grpc_exec_ctx* exec_ctx,
-                                                grpc_slice_buffer* sb);
-void grpc_slice_buffer_partial_unref_internal(grpc_exec_ctx* exec_ctx,
-                                              grpc_slice_buffer* sb,
+void grpc_slice_unref_internal(grpc_slice slice);
+void grpc_slice_buffer_reset_and_unref_internal(grpc_slice_buffer* sb);
+void grpc_slice_buffer_partial_unref_internal(grpc_slice_buffer* sb,
                                               size_t idx);
-void grpc_slice_buffer_destroy_internal(grpc_exec_ctx* exec_ctx,
-                                        grpc_slice_buffer* sb);
+void grpc_slice_buffer_destroy_internal(grpc_slice_buffer* sb);
 
 /* Check if a slice is interned */
 bool grpc_slice_is_interned(grpc_slice slice);
diff --git a/src/core/lib/support/sync_posix.cc b/src/core/lib/support/sync_posix.cc
index dfdd233bf4..c3f6b10463 100644
--- a/src/core/lib/support/sync_posix.cc
+++ b/src/core/lib/support/sync_posix.cc
@@ -66,7 +66,12 @@ int gpr_mu_trylock(gpr_mu* mu) {
 /*----------------------------------------*/
 
 void gpr_cv_init(gpr_cv* cv) {
-  GPR_ASSERT(pthread_cond_init(cv, nullptr) == 0);
+  pthread_condattr_t attr;
+  GPR_ASSERT(pthread_condattr_init(&attr) == 0);
+#if GPR_LINUX
+  GPR_ASSERT(pthread_condattr_setclock(&attr, CLOCK_MONOTONIC) == 0);
+#endif  // GPR_LINUX
+  GPR_ASSERT(pthread_cond_init(cv, &attr) == 0);
 }
 
 void gpr_cv_destroy(gpr_cv* cv) { GPR_ASSERT(pthread_cond_destroy(cv) == 0); }
@@ -78,7 +83,11 @@ int gpr_cv_wait(gpr_cv* cv, gpr_mu* mu, gpr_timespec abs_deadline) {
     err = pthread_cond_wait(cv, mu);
   } else {
     struct timespec abs_deadline_ts;
+#if GPR_LINUX
+    abs_deadline = gpr_convert_clock_type(abs_deadline, GPR_CLOCK_MONOTONIC);
+#else
     abs_deadline = gpr_convert_clock_type(abs_deadline, GPR_CLOCK_REALTIME);
+#endif  // GPR_LINUX
     abs_deadline_ts.tv_sec = (time_t)abs_deadline.tv_sec;
     abs_deadline_ts.tv_nsec = abs_deadline.tv_nsec;
     err = pthread_cond_timedwait(cv, mu, &abs_deadline_ts);
diff --git a/src/core/lib/support/thd_posix.cc b/src/core/lib/support/thd_posix.cc
index c2a4f4198f..f0ed48dbfc 100644
--- a/src/core/lib/support/thd_posix.cc
+++ b/src/core/lib/support/thd_posix.cc
@@ -41,6 +41,7 @@ static int g_awaiting_threads;
 struct thd_arg {
   void (*body)(void* arg); /* body of a thread */
   void* arg;               /* argument to a thread */
+  const char* name;        /* name of thread. Can be nullptr. */
 };
 
 static void inc_thd_count();
@@ -50,12 +51,26 @@ static void dec_thd_count();
 static void* thread_body(void* v) {
   struct thd_arg a = *(struct thd_arg*)v;
   free(v);
+  if (a.name != nullptr) {
+#if GPR_APPLE_PTHREAD_NAME
+    /* Apple supports 64 characters, and will truncate if it's longer. */
+    pthread_setname_np(a.name);
+#elif GPR_LINUX_PTHREAD_NAME
+    /* Linux supports 16 characters max, and will error if it's longer. */
+    char buf[16];
+    size_t buf_len = GPR_ARRAY_SIZE(buf) - 1;
+    strncpy(buf, a.name, buf_len);
+    buf[buf_len] = '\0';
+    pthread_setname_np(pthread_self(), buf);
+#endif  // GPR_APPLE_PTHREAD_NAME
+  }
   (*a.body)(a.arg);
   dec_thd_count();
   return nullptr;
 }
 
-int gpr_thd_new(gpr_thd_id* t, void (*thd_body)(void* arg), void* arg,
+int gpr_thd_new(gpr_thd_id* t, const char* thd_name,
+                void (*thd_body)(void* arg), void* arg,
                 const gpr_thd_options* options) {
   int thread_started;
   pthread_attr_t attr;
@@ -66,6 +81,7 @@ int gpr_thd_new(gpr_thd_id* t, void (*thd_body)(void* arg), void* arg,
   GPR_ASSERT(a != nullptr);
   a->body = thd_body;
   a->arg = arg;
+  a->name = thd_name;
   inc_thd_count();
 
   GPR_ASSERT(pthread_attr_init(&attr) == 0);
diff --git a/src/core/lib/support/thd_windows.cc b/src/core/lib/support/thd_windows.cc
index 0875c2f03e..f920770f32 100644
--- a/src/core/lib/support/thd_windows.cc
+++ b/src/core/lib/support/thd_windows.cc
@@ -65,7 +65,8 @@ static DWORD WINAPI thread_body(void* v) {
   return 0;
 }
 
-int gpr_thd_new(gpr_thd_id* t, void (*thd_body)(void* arg), void* arg,
+int gpr_thd_new(gpr_thd_id* t, const char* thd_name,
+                void (*thd_body)(void* arg), void* arg,
                 const gpr_thd_options* options) {
   HANDLE handle;
   struct thd_info* info = (struct thd_info*)gpr_malloc(sizeof(*info));
diff --git a/src/core/lib/surface/alarm.cc b/src/core/lib/surface/alarm.cc
index b1c9f7b164..f6ea016c33 100644
--- a/src/core/lib/surface/alarm.cc
+++ b/src/core/lib/surface/alarm.cc
@@ -45,11 +45,11 @@ static void alarm_ref(grpc_alarm* alarm) { gpr_ref(&alarm->refs); }
 
 static void alarm_unref(grpc_alarm* alarm) {
   if (gpr_unref(&alarm->refs)) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     if (alarm->cq != nullptr) {
-      GRPC_CQ_INTERNAL_UNREF(&exec_ctx, alarm->cq, "alarm");
+      GRPC_CQ_INTERNAL_UNREF(alarm->cq, "alarm");
     }
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_free(alarm);
   }
 }
@@ -80,20 +80,19 @@ static void alarm_unref_dbg(grpc_alarm* alarm, const char* reason,
 }
 #endif
 
-static void alarm_end_completion(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_cq_completion* c) {
+static void alarm_end_completion(void* arg, grpc_cq_completion* c) {
   grpc_alarm* alarm = (grpc_alarm*)arg;
   GRPC_ALARM_UNREF(alarm, "dequeue-end-op");
 }
 
-static void alarm_cb(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void alarm_cb(void* arg, grpc_error* error) {
   grpc_alarm* alarm = (grpc_alarm*)arg;
 
   /* We are queuing an op on completion queue. This means, the alarm's structure
      cannot be destroyed until the op is dequeued. Adding an extra ref
      here and unref'ing when the op is dequeued will achieve this */
   GRPC_ALARM_REF(alarm, "queue-end-op");
-  grpc_cq_end_op(exec_ctx, alarm->cq, alarm->tag, error, alarm_end_completion,
+  grpc_cq_end_op(alarm->cq, alarm->tag, error, alarm_end_completion,
                  (void*)alarm, &alarm->completion);
 }
 
@@ -116,22 +115,20 @@ grpc_alarm* grpc_alarm_create(void* reserved) {
 
 void grpc_alarm_set(grpc_alarm* alarm, grpc_completion_queue* cq,
                     gpr_timespec deadline, void* tag, void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_CQ_INTERNAL_REF(cq, "alarm");
   alarm->cq = cq;
   alarm->tag = tag;
 
   GPR_ASSERT(grpc_cq_begin_op(cq, tag));
-  grpc_timer_init(&exec_ctx, &alarm->alarm,
-                  grpc_timespec_to_millis_round_up(deadline), &alarm->on_alarm);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_timer_init(&alarm->alarm, grpc_timespec_to_millis_round_up(deadline),
+                  &alarm->on_alarm);
 }
 
 void grpc_alarm_cancel(grpc_alarm* alarm, void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_timer_cancel(&exec_ctx, &alarm->alarm);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_timer_cancel(&alarm->alarm);
 }
 
 void grpc_alarm_destroy(grpc_alarm* alarm, void* reserved) {
diff --git a/src/core/lib/surface/byte_buffer.cc b/src/core/lib/surface/byte_buffer.cc
index 9e0636b4ce..e4c2a4a4c2 100644
--- a/src/core/lib/surface/byte_buffer.cc
+++ b/src/core/lib/surface/byte_buffer.cc
@@ -71,14 +71,13 @@ grpc_byte_buffer* grpc_byte_buffer_copy(grpc_byte_buffer* bb) {
 
 void grpc_byte_buffer_destroy(grpc_byte_buffer* bb) {
   if (!bb) return;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   switch (bb->type) {
     case GRPC_BB_RAW:
-      grpc_slice_buffer_destroy_internal(&exec_ctx, &bb->data.raw.slice_buffer);
+      grpc_slice_buffer_destroy_internal(&bb->data.raw.slice_buffer);
       break;
   }
   gpr_free(bb);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 size_t grpc_byte_buffer_length(grpc_byte_buffer* bb) {
diff --git a/src/core/lib/surface/byte_buffer_reader.cc b/src/core/lib/surface/byte_buffer_reader.cc
index 001227a2aa..81a48e95fc 100644
--- a/src/core/lib/surface/byte_buffer_reader.cc
+++ b/src/core/lib/surface/byte_buffer_reader.cc
@@ -42,15 +42,14 @@ static int is_compressed(grpc_byte_buffer* buffer) {
 
 int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader* reader,
                                  grpc_byte_buffer* buffer) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_slice_buffer decompressed_slices_buffer;
   reader->buffer_in = buffer;
   switch (reader->buffer_in->type) {
     case GRPC_BB_RAW:
       grpc_slice_buffer_init(&decompressed_slices_buffer);
       if (is_compressed(reader->buffer_in)) {
-        if (grpc_msg_decompress(&exec_ctx,
-                                reader->buffer_in->data.raw.compression,
+        if (grpc_msg_decompress(reader->buffer_in->data.raw.compression,
                                 &reader->buffer_in->data.raw.slice_buffer,
                                 &decompressed_slices_buffer) == 0) {
           gpr_log(GPR_ERROR,
@@ -64,15 +63,14 @@ int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader* reader,
               grpc_raw_byte_buffer_create(decompressed_slices_buffer.slices,
                                           decompressed_slices_buffer.count);
         }
-        grpc_slice_buffer_destroy_internal(&exec_ctx,
-                                           &decompressed_slices_buffer);
+        grpc_slice_buffer_destroy_internal(&decompressed_slices_buffer);
       } else { /* not compressed, use the input buffer as output */
         reader->buffer_out = reader->buffer_in;
       }
       reader->current.index = 0;
       break;
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return 1;
 }
 
@@ -112,14 +110,14 @@ grpc_slice grpc_byte_buffer_reader_readall(grpc_byte_buffer_reader* reader) {
   grpc_slice out_slice = GRPC_SLICE_MALLOC(input_size);
   uint8_t* const outbuf = GRPC_SLICE_START_PTR(out_slice); /* just an alias */
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (grpc_byte_buffer_reader_next(reader, &in_slice) != 0) {
     const size_t slice_length = GRPC_SLICE_LENGTH(in_slice);
     memcpy(&(outbuf[bytes_read]), GRPC_SLICE_START_PTR(in_slice), slice_length);
     bytes_read += slice_length;
-    grpc_slice_unref_internal(&exec_ctx, in_slice);
+    grpc_slice_unref_internal(in_slice);
     GPR_ASSERT(bytes_read <= input_size);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return out_slice;
 }
diff --git a/src/core/lib/surface/call.cc b/src/core/lib/surface/call.cc
index a2eb02bd85..a457aaa7a2 100644
--- a/src/core/lib/surface/call.cc
+++ b/src/core/lib/surface/call.cc
@@ -270,30 +270,25 @@ grpc_core::TraceFlag grpc_compression_trace(false, "compression");
 #define CALL_FROM_TOP_ELEM(top_elem) \
   CALL_FROM_CALL_STACK(grpc_call_stack_from_top_element(top_elem))
 
-static void execute_batch(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                          grpc_transport_stream_op_batch* op,
+static void execute_batch(grpc_call* call, grpc_transport_stream_op_batch* op,
                           grpc_closure* start_batch_closure);
-static void cancel_with_status(grpc_exec_ctx* exec_ctx, grpc_call* c,
-                               status_source source, grpc_status_code status,
+static void cancel_with_status(grpc_call* c, status_source source,
+                               grpc_status_code status,
                                const char* description);
-static void cancel_with_error(grpc_exec_ctx* exec_ctx, grpc_call* c,
-                              status_source source, grpc_error* error);
-static void destroy_call(grpc_exec_ctx* exec_ctx, void* call_stack,
-                         grpc_error* error);
-static void receiving_slice_ready(grpc_exec_ctx* exec_ctx, void* bctlp,
-                                  grpc_error* error);
-static void get_final_status(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                             void (*set_value)(grpc_status_code code,
-                                               void* user_data),
-                             void* set_value_user_data, grpc_slice* details,
-                             const char** error_string);
+static void cancel_with_error(grpc_call* c, status_source source,
+                              grpc_error* error);
+static void destroy_call(void* call_stack, grpc_error* error);
+static void receiving_slice_ready(void* bctlp, grpc_error* error);
+static void get_final_status(
+    grpc_call* call, void (*set_value)(grpc_status_code code, void* user_data),
+    void* set_value_user_data, grpc_slice* details, const char** error_string);
 static void set_status_value_directly(grpc_status_code status, void* dest);
-static void set_status_from_error(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                                  status_source source, grpc_error* error);
-static void process_data_after_md(grpc_exec_ctx* exec_ctx, batch_control* bctl);
-static void post_batch_completion(grpc_exec_ctx* exec_ctx, batch_control* bctl);
-static void add_batch_error(grpc_exec_ctx* exec_ctx, batch_control* bctl,
-                            grpc_error* error, bool has_cancelled);
+static void set_status_from_error(grpc_call* call, status_source source,
+                                  grpc_error* error);
+static void process_data_after_md(batch_control* bctl);
+static void post_batch_completion(batch_control* bctl);
+static void add_batch_error(batch_control* bctl, grpc_error* error,
+                            bool has_cancelled);
 
 static void add_init_error(grpc_error** composite, grpc_error* new_err) {
   if (new_err == GRPC_ERROR_NONE) return;
@@ -311,7 +306,8 @@ static parent_call* get_or_create_parent_call(grpc_call* call) {
   if (p == nullptr) {
     p = (parent_call*)gpr_arena_alloc(call->arena, sizeof(*p));
     gpr_mu_init(&p->child_list_mu);
-    if (!gpr_atm_rel_cas(&call->parent_call_atm, (gpr_atm)NULL, (gpr_atm)p)) {
+    if (!gpr_atm_rel_cas(&call->parent_call_atm, (gpr_atm) nullptr,
+                         (gpr_atm)p)) {
       gpr_mu_destroy(&p->child_list_mu);
       p = (parent_call*)gpr_atm_acq_load(&call->parent_call_atm);
     }
@@ -323,8 +319,7 @@ static parent_call* get_parent_call(grpc_call* call) {
   return (parent_call*)gpr_atm_acq_load(&call->parent_call_atm);
 }
 
-grpc_error* grpc_call_create(grpc_exec_ctx* exec_ctx,
-                             const grpc_call_create_args* args,
+grpc_error* grpc_call_create(const grpc_call_create_args* args,
                              grpc_call** out_call) {
   size_t i, j;
   grpc_error* error = GRPC_ERROR_NONE;
@@ -333,7 +328,7 @@ grpc_error* grpc_call_create(grpc_exec_ctx* exec_ctx,
   grpc_call* call;
   GPR_TIMER_BEGIN("grpc_call_create", 0);
   size_t initial_size = grpc_channel_get_call_size_estimate(args->channel);
-  GRPC_STATS_INC_CALL_INITIAL_SIZE(exec_ctx, initial_size);
+  GRPC_STATS_INC_CALL_INITIAL_SIZE(initial_size);
   gpr_arena* arena = gpr_arena_create(initial_size);
   call = (grpc_call*)gpr_arena_alloc(
       arena, sizeof(grpc_call) + channel_stack->call_stack_size);
@@ -348,9 +343,9 @@ grpc_error* grpc_call_create(grpc_exec_ctx* exec_ctx,
   GPR_BITSET(&call->encodings_accepted_by_peer, GRPC_COMPRESS_NONE);
   call->is_client = args->server_transport_data == nullptr;
   if (call->is_client) {
-    GRPC_STATS_INC_CLIENT_CALLS_CREATED(exec_ctx);
+    GRPC_STATS_INC_CLIENT_CALLS_CREATED();
   } else {
-    GRPC_STATS_INC_SERVER_CALLS_CREATED(exec_ctx);
+    GRPC_STATS_INC_SERVER_CALLS_CREATED();
   }
   call->stream_op_payload.context = call->context;
   grpc_slice path = grpc_empty_slice();
@@ -445,15 +440,13 @@ grpc_error* grpc_call_create(grpc_exec_ctx* exec_ctx,
                                       send_deadline,
                                       call->arena,
                                       &call->call_combiner};
-  add_init_error(&error, grpc_call_stack_init(exec_ctx, channel_stack, 1,
-                                              destroy_call, call, &call_args));
+  add_init_error(&error, grpc_call_stack_init(channel_stack, 1, destroy_call,
+                                              call, &call_args));
   if (error != GRPC_ERROR_NONE) {
-    cancel_with_error(exec_ctx, call, STATUS_FROM_SURFACE,
-                      GRPC_ERROR_REF(error));
+    cancel_with_error(call, STATUS_FROM_SURFACE, GRPC_ERROR_REF(error));
   }
   if (immediately_cancel) {
-    cancel_with_error(exec_ctx, call, STATUS_FROM_API_OVERRIDE,
-                      GRPC_ERROR_CANCELLED);
+    cancel_with_error(call, STATUS_FROM_API_OVERRIDE, GRPC_ERROR_CANCELLED);
   }
   if (args->cq != nullptr) {
     GPR_ASSERT(
@@ -468,17 +461,17 @@ grpc_error* grpc_call_create(grpc_exec_ctx* exec_ctx,
         args->pollset_set_alternative);
   }
   if (!grpc_polling_entity_is_empty(&call->pollent)) {
-    grpc_call_stack_set_pollset_or_pollset_set(
-        exec_ctx, CALL_STACK_FROM_CALL(call), &call->pollent);
+    grpc_call_stack_set_pollset_or_pollset_set(CALL_STACK_FROM_CALL(call),
+                                               &call->pollent);
   }
 
-  grpc_slice_unref_internal(exec_ctx, path);
+  grpc_slice_unref_internal(path);
 
   GPR_TIMER_END("grpc_call_create", 0);
   return error;
 }
 
-void grpc_call_set_completion_queue(grpc_exec_ctx* exec_ctx, grpc_call* call,
+void grpc_call_set_completion_queue(grpc_call* call,
                                     grpc_completion_queue* cq) {
   GPR_ASSERT(cq);
 
@@ -489,8 +482,8 @@ void grpc_call_set_completion_queue(grpc_exec_ctx* exec_ctx, grpc_call* call,
   call->cq = cq;
   GRPC_CQ_INTERNAL_REF(cq, "bind");
   call->pollent = grpc_polling_entity_create_from_pollset(grpc_cq_pollset(cq));
-  grpc_call_stack_set_pollset_or_pollset_set(
-      exec_ctx, CALL_STACK_FROM_CALL(call), &call->pollent);
+  grpc_call_stack_set_pollset_or_pollset_set(CALL_STACK_FROM_CALL(call),
+                                             &call->pollent);
 }
 
 #ifndef NDEBUG
@@ -503,40 +496,38 @@ void grpc_call_set_completion_queue(grpc_exec_ctx* exec_ctx, grpc_call* call,
 void grpc_call_internal_ref(grpc_call* c REF_ARG) {
   GRPC_CALL_STACK_REF(CALL_STACK_FROM_CALL(c), REF_REASON);
 }
-void grpc_call_internal_unref(grpc_exec_ctx* exec_ctx, grpc_call* c REF_ARG) {
-  GRPC_CALL_STACK_UNREF(exec_ctx, CALL_STACK_FROM_CALL(c), REF_REASON);
+void grpc_call_internal_unref(grpc_call* c REF_ARG) {
+  GRPC_CALL_STACK_UNREF(CALL_STACK_FROM_CALL(c), REF_REASON);
 }
 
-static void release_call(grpc_exec_ctx* exec_ctx, void* call,
-                         grpc_error* error) {
+static void release_call(void* call, grpc_error* error) {
   grpc_call* c = (grpc_call*)call;
   grpc_channel* channel = c->channel;
   grpc_call_combiner_destroy(&c->call_combiner);
   gpr_free((char*)c->peer_string);
   grpc_channel_update_call_size_estimate(channel, gpr_arena_destroy(c->arena));
-  GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, channel, "call");
+  GRPC_CHANNEL_INTERNAL_UNREF(channel, "call");
 }
 
 static void set_status_value_directly(grpc_status_code status, void* dest);
-static void destroy_call(grpc_exec_ctx* exec_ctx, void* call,
-                         grpc_error* error) {
+static void destroy_call(void* call, grpc_error* error) {
   size_t i;
   int ii;
   grpc_call* c = (grpc_call*)call;
   GPR_TIMER_BEGIN("destroy_call", 0);
   for (i = 0; i < 2; i++) {
     grpc_metadata_batch_destroy(
-        exec_ctx, &c->metadata_batch[1 /* is_receiving */][i /* is_initial */]);
+        &c->metadata_batch[1 /* is_receiving */][i /* is_initial */]);
   }
   if (c->receiving_stream != nullptr) {
-    grpc_byte_stream_destroy(exec_ctx, c->receiving_stream);
+    grpc_byte_stream_destroy(c->receiving_stream);
   }
   parent_call* pc = get_parent_call(c);
   if (pc != nullptr) {
     gpr_mu_destroy(&pc->child_list_mu);
   }
   for (ii = 0; ii < c->send_extra_metadata_count; ii++) {
-    GRPC_MDELEM_UNREF(exec_ctx, c->send_extra_metadata[ii].md);
+    GRPC_MDELEM_UNREF(c->send_extra_metadata[ii].md);
   }
   for (i = 0; i < GRPC_CONTEXT_COUNT; i++) {
     if (c->context[i].destroy) {
@@ -544,12 +535,11 @@ static void destroy_call(grpc_exec_ctx* exec_ctx, void* call,
     }
   }
   if (c->cq) {
-    GRPC_CQ_INTERNAL_UNREF(exec_ctx, c->cq, "bind");
+    GRPC_CQ_INTERNAL_UNREF(c->cq, "bind");
   }
 
-  get_final_status(exec_ctx, c, set_status_value_directly,
-                   &c->final_info.final_status, nullptr,
-                   c->final_info.error_string);
+  get_final_status(c, set_status_value_directly, &c->final_info.final_status,
+                   nullptr, c->final_info.error_string);
   c->final_info.stats.latency =
       gpr_time_sub(gpr_now(GPR_CLOCK_MONOTONIC), c->start_time);
 
@@ -558,7 +548,7 @@ static void destroy_call(grpc_exec_ctx* exec_ctx, void* call,
         unpack_received_status(gpr_atm_acq_load(&c->status[i])).error);
   }
 
-  grpc_call_stack_destroy(exec_ctx, CALL_STACK_FROM_CALL(c), &c->final_info,
+  grpc_call_stack_destroy(CALL_STACK_FROM_CALL(c), &c->final_info,
                           GRPC_CLOSURE_INIT(&c->release_call, release_call, c,
                                             grpc_schedule_on_exec_ctx));
   GPR_TIMER_END("destroy_call", 0);
@@ -570,7 +560,7 @@ void grpc_call_unref(grpc_call* c) {
   if (!gpr_unref(&c->ext_ref)) return;
 
   child_call* cc = c->child;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GPR_TIMER_BEGIN("grpc_call_unref", 0);
   GRPC_API_TRACE("grpc_call_unref(c=%p)", 1, (c));
@@ -587,7 +577,7 @@ void grpc_call_unref(grpc_call* c) {
     cc->sibling_prev->child->sibling_next = cc->sibling_next;
     cc->sibling_next->child->sibling_prev = cc->sibling_prev;
     gpr_mu_unlock(&pc->child_list_mu);
-    GRPC_CALL_INTERNAL_UNREF(&exec_ctx, cc->parent, "child");
+    GRPC_CALL_INTERNAL_UNREF(cc->parent, "child");
   }
 
   GPR_ASSERT(!c->destroy_called);
@@ -595,53 +585,49 @@ void grpc_call_unref(grpc_call* c) {
   bool cancel = gpr_atm_acq_load(&c->any_ops_sent_atm) != 0 &&
                 gpr_atm_acq_load(&c->received_final_op_atm) == 0;
   if (cancel) {
-    cancel_with_error(&exec_ctx, c, STATUS_FROM_API_OVERRIDE,
-                      GRPC_ERROR_CANCELLED);
+    cancel_with_error(c, STATUS_FROM_API_OVERRIDE, GRPC_ERROR_CANCELLED);
   } else {
     // Unset the call combiner cancellation closure.  This has the
     // effect of scheduling the previously set cancellation closure, if
     // any, so that it can release any internal references it may be
     // holding to the call stack.
-    grpc_call_combiner_set_notify_on_cancel(&exec_ctx, &c->call_combiner,
-                                            nullptr);
+    grpc_call_combiner_set_notify_on_cancel(&c->call_combiner, nullptr);
   }
-  GRPC_CALL_INTERNAL_UNREF(&exec_ctx, c, "destroy");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CALL_INTERNAL_UNREF(c, "destroy");
+
   GPR_TIMER_END("grpc_call_unref", 0);
 }
 
 grpc_call_error grpc_call_cancel(grpc_call* call, void* reserved) {
   GRPC_API_TRACE("grpc_call_cancel(call=%p, reserved=%p)", 2, (call, reserved));
   GPR_ASSERT(!reserved);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  cancel_with_error(&exec_ctx, call, STATUS_FROM_API_OVERRIDE,
-                    GRPC_ERROR_CANCELLED);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  cancel_with_error(call, STATUS_FROM_API_OVERRIDE, GRPC_ERROR_CANCELLED);
+
   return GRPC_CALL_OK;
 }
 
 // This is called via the call combiner to start sending a batch down
 // the filter stack.
-static void execute_batch_in_call_combiner(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* ignored) {
+static void execute_batch_in_call_combiner(void* arg, grpc_error* ignored) {
   grpc_transport_stream_op_batch* batch = (grpc_transport_stream_op_batch*)arg;
   grpc_call* call = (grpc_call*)batch->handler_private.extra_arg;
   GPR_TIMER_BEGIN("execute_batch", 0);
   grpc_call_element* elem = CALL_ELEM_FROM_CALL(call, 0);
   GRPC_CALL_LOG_OP(GPR_INFO, elem, batch);
-  elem->filter->start_transport_stream_op_batch(exec_ctx, elem, batch);
+  elem->filter->start_transport_stream_op_batch(elem, batch);
   GPR_TIMER_END("execute_batch", 0);
 }
 
 // start_batch_closure points to a caller-allocated closure to be used
 // for entering the call combiner.
-static void execute_batch(grpc_exec_ctx* exec_ctx, grpc_call* call,
+static void execute_batch(grpc_call* call,
                           grpc_transport_stream_op_batch* batch,
                           grpc_closure* start_batch_closure) {
   batch->handler_private.extra_arg = call;
   GRPC_CLOSURE_INIT(start_batch_closure, execute_batch_in_call_combiner, batch,
                     grpc_schedule_on_exec_ctx);
-  GRPC_CALL_COMBINER_START(exec_ctx, &call->call_combiner, start_batch_closure,
+  GRPC_CALL_COMBINER_START(&call->call_combiner, start_batch_closure,
                            GRPC_ERROR_NONE, "executing batch");
 }
 
@@ -665,15 +651,14 @@ grpc_call_error grpc_call_cancel_with_status(grpc_call* c,
                                              grpc_status_code status,
                                              const char* description,
                                              void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_API_TRACE(
       "grpc_call_cancel_with_status("
       "c=%p, status=%d, description=%s, reserved=%p)",
       4, (c, (int)status, description, reserved));
   GPR_ASSERT(reserved == nullptr);
-  cancel_with_status(&exec_ctx, c, STATUS_FROM_API_OVERRIDE, status,
-                     description);
-  grpc_exec_ctx_finish(&exec_ctx);
+  cancel_with_status(c, STATUS_FROM_API_OVERRIDE, status, description);
+
   return GRPC_CALL_OK;
 }
 
@@ -685,24 +670,23 @@ typedef struct {
 
 // The on_complete callback used when sending a cancel_stream batch down
 // the filter stack.  Yields the call combiner when the batch is done.
-static void done_termination(grpc_exec_ctx* exec_ctx, void* arg,
-                             grpc_error* error) {
+static void done_termination(void* arg, grpc_error* error) {
   cancel_state* state = (cancel_state*)arg;
-  GRPC_CALL_COMBINER_STOP(exec_ctx, &state->call->call_combiner,
+  GRPC_CALL_COMBINER_STOP(&state->call->call_combiner,
                           "on_complete for cancel_stream op");
-  GRPC_CALL_INTERNAL_UNREF(exec_ctx, state->call, "termination");
+  GRPC_CALL_INTERNAL_UNREF(state->call, "termination");
   gpr_free(state);
 }
 
-static void cancel_with_error(grpc_exec_ctx* exec_ctx, grpc_call* c,
-                              status_source source, grpc_error* error) {
+static void cancel_with_error(grpc_call* c, status_source source,
+                              grpc_error* error) {
   GRPC_CALL_INTERNAL_REF(c, "termination");
   // Inform the call combiner of the cancellation, so that it can cancel
   // any in-flight asynchronous actions that may be holding the call
   // combiner.  This ensures that the cancel_stream batch can be sent
   // down the filter stack in a timely manner.
-  grpc_call_combiner_cancel(exec_ctx, &c->call_combiner, GRPC_ERROR_REF(error));
-  set_status_from_error(exec_ctx, c, source, GRPC_ERROR_REF(error));
+  grpc_call_combiner_cancel(&c->call_combiner, GRPC_ERROR_REF(error));
+  set_status_from_error(c, source, GRPC_ERROR_REF(error));
   cancel_state* state = (cancel_state*)gpr_malloc(sizeof(*state));
   state->call = c;
   GRPC_CLOSURE_INIT(&state->finish_batch, done_termination, state,
@@ -711,7 +695,7 @@ static void cancel_with_error(grpc_exec_ctx* exec_ctx, grpc_call* c,
       grpc_make_transport_stream_op(&state->finish_batch);
   op->cancel_stream = true;
   op->payload->cancel_stream.cancel_error = error;
-  execute_batch(exec_ctx, c, op, &state->start_batch);
+  execute_batch(c, op, &state->start_batch);
 }
 
 static grpc_error* error_from_status(grpc_status_code status,
@@ -725,11 +709,10 @@ static grpc_error* error_from_status(grpc_status_code status,
       GRPC_ERROR_INT_GRPC_STATUS, status);
 }
 
-static void cancel_with_status(grpc_exec_ctx* exec_ctx, grpc_call* c,
-                               status_source source, grpc_status_code status,
+static void cancel_with_status(grpc_call* c, status_source source,
+                               grpc_status_code status,
                                const char* description) {
-  cancel_with_error(exec_ctx, c, source,
-                    error_from_status(status, description));
+  cancel_with_error(c, source, error_from_status(status, description));
 }
 
 /*******************************************************************************
@@ -737,14 +720,13 @@ static void cancel_with_status(grpc_exec_ctx* exec_ctx, grpc_call* c,
  */
 
 static bool get_final_status_from(
-    grpc_exec_ctx* exec_ctx, grpc_call* call, grpc_error* error,
-    bool allow_ok_status,
+    grpc_call* call, grpc_error* error, bool allow_ok_status,
     void (*set_value)(grpc_status_code code, void* user_data),
     void* set_value_user_data, grpc_slice* details, const char** error_string) {
   grpc_status_code code;
   grpc_slice slice = grpc_empty_slice();
-  grpc_error_get_status(exec_ctx, error, call->send_deadline, &code, &slice,
-                        nullptr, error_string);
+  grpc_error_get_status(error, call->send_deadline, &code, &slice, nullptr,
+                        error_string);
   if (code == GRPC_STATUS_OK && !allow_ok_status) {
     return false;
   }
@@ -756,11 +738,9 @@ static bool get_final_status_from(
   return true;
 }
 
-static void get_final_status(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                             void (*set_value)(grpc_status_code code,
-                                               void* user_data),
-                             void* set_value_user_data, grpc_slice* details,
-                             const char** error_string) {
+static void get_final_status(
+    grpc_call* call, void (*set_value)(grpc_status_code code, void* user_data),
+    void* set_value_user_data, grpc_slice* details, const char** error_string) {
   int i;
   received_status status[STATUS_SOURCE_COUNT];
   for (i = 0; i < STATUS_SOURCE_COUNT; i++) {
@@ -782,9 +762,9 @@ static void get_final_status(grpc_exec_ctx* exec_ctx, grpc_call* call,
     for (i = 0; i < STATUS_SOURCE_COUNT; i++) {
       if (status[i].is_set &&
           grpc_error_has_clear_grpc_status(status[i].error)) {
-        if (get_final_status_from(exec_ctx, call, status[i].error,
-                                  allow_ok_status != 0, set_value,
-                                  set_value_user_data, details, error_string)) {
+        if (get_final_status_from(call, status[i].error, allow_ok_status != 0,
+                                  set_value, set_value_user_data, details,
+                                  error_string)) {
           return;
         }
       }
@@ -792,9 +772,9 @@ static void get_final_status(grpc_exec_ctx* exec_ctx, grpc_call* call,
     /* If no clearly defined status exists, search for 'anything' */
     for (i = 0; i < STATUS_SOURCE_COUNT; i++) {
       if (status[i].is_set) {
-        if (get_final_status_from(exec_ctx, call, status[i].error,
-                                  allow_ok_status != 0, set_value,
-                                  set_value_user_data, details, error_string)) {
+        if (get_final_status_from(call, status[i].error, allow_ok_status != 0,
+                                  set_value, set_value_user_data, details,
+                                  error_string)) {
           return;
         }
       }
@@ -808,8 +788,8 @@ static void get_final_status(grpc_exec_ctx* exec_ctx, grpc_call* call,
   }
 }
 
-static void set_status_from_error(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                                  status_source source, grpc_error* error) {
+static void set_status_from_error(grpc_call* call, status_source source,
+                                  grpc_error* error) {
   if (!gpr_atm_rel_cas(&call->status[source],
                        pack_received_status({false, GRPC_ERROR_NONE}),
                        pack_received_status({true, error}))) {
@@ -861,8 +841,7 @@ uint32_t grpc_call_test_only_get_message_flags(grpc_call* call) {
 
 static void destroy_encodings_accepted_by_peer(void* p) { return; }
 
-static void set_encodings_accepted_by_peer(grpc_exec_ctx* exec_ctx,
-                                           grpc_call* call, grpc_mdelem mdel) {
+static void set_encodings_accepted_by_peer(grpc_call* call, grpc_mdelem mdel) {
   size_t i;
   grpc_compression_algorithm algorithm;
   grpc_slice_buffer accept_encoding_parts;
@@ -900,15 +879,14 @@ static void set_encodings_accepted_by_peer(grpc_exec_ctx* exec_ctx,
     }
   }
 
-  grpc_slice_buffer_destroy_internal(exec_ctx, &accept_encoding_parts);
+  grpc_slice_buffer_destroy_internal(&accept_encoding_parts);
 
   grpc_mdelem_set_user_data(
       mdel, destroy_encodings_accepted_by_peer,
       (void*)(((uintptr_t)call->encodings_accepted_by_peer) + 1));
 }
 
-static void set_stream_encodings_accepted_by_peer(grpc_exec_ctx* exec_ctx,
-                                                  grpc_call* call,
+static void set_stream_encodings_accepted_by_peer(grpc_call* call,
                                                   grpc_mdelem mdel) {
   size_t i;
   grpc_stream_compression_algorithm algorithm;
@@ -946,7 +924,7 @@ static void set_stream_encodings_accepted_by_peer(grpc_exec_ctx* exec_ctx,
     }
   }
 
-  grpc_slice_buffer_destroy_internal(exec_ctx, &accept_encoding_parts);
+  grpc_slice_buffer_destroy_internal(&accept_encoding_parts);
 
   grpc_mdelem_set_user_data(
       mdel, destroy_encodings_accepted_by_peer,
@@ -984,10 +962,12 @@ static grpc_metadata* get_md_elem(grpc_metadata* metadata,
   return res;
 }
 
-static int prepare_application_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call* call, int count,
-    grpc_metadata* metadata, int is_trailing, int prepend_extra_metadata,
-    grpc_metadata* additional_metadata, int additional_metadata_count) {
+static int prepare_application_metadata(grpc_call* call, int count,
+                                        grpc_metadata* metadata,
+                                        int is_trailing,
+                                        int prepend_extra_metadata,
+                                        grpc_metadata* additional_metadata,
+                                        int additional_metadata_count) {
   int total_count = count + additional_metadata_count;
   int i;
   grpc_metadata_batch* batch =
@@ -1006,14 +986,14 @@ static int prepare_application_metadata(
                    grpc_validate_header_nonbin_value_is_legal(md->value))) {
       break;
     }
-    l->md = grpc_mdelem_from_grpc_metadata(exec_ctx, (grpc_metadata*)md);
+    l->md = grpc_mdelem_from_grpc_metadata((grpc_metadata*)md);
   }
   if (i != total_count) {
     for (int j = 0; j < i; j++) {
       const grpc_metadata* md =
           get_md_elem(metadata, additional_metadata, j, count);
       grpc_linked_mdelem* l = linked_from_md(md);
-      GRPC_MDELEM_UNREF(exec_ctx, l->md);
+      GRPC_MDELEM_UNREF(l->md);
     }
     return 0;
   }
@@ -1024,16 +1004,16 @@ static int prepare_application_metadata(
       for (i = 0; i < call->send_extra_metadata_count; i++) {
         GRPC_LOG_IF_ERROR("prepare_application_metadata",
                           grpc_metadata_batch_link_tail(
-                              exec_ctx, batch, &call->send_extra_metadata[i]));
+                              batch, &call->send_extra_metadata[i]));
       }
     }
   }
   for (i = 0; i < total_count; i++) {
     grpc_metadata* md = get_md_elem(metadata, additional_metadata, i, count);
     grpc_linked_mdelem* l = linked_from_md(md);
-    grpc_error* error = grpc_metadata_batch_link_tail(exec_ctx, batch, l);
+    grpc_error* error = grpc_metadata_batch_link_tail(batch, l);
     if (error != GRPC_ERROR_NONE) {
-      GRPC_MDELEM_UNREF(exec_ctx, l->md);
+      GRPC_MDELEM_UNREF(l->md);
     }
     GRPC_LOG_IF_ERROR("prepare_application_metadata", error);
   }
@@ -1120,46 +1100,43 @@ static void publish_app_metadata(grpc_call* call, grpc_metadata_batch* b,
   GPR_TIMER_END("publish_app_metadata", 0);
 }
 
-static void recv_initial_filter(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                                grpc_metadata_batch* b) {
+static void recv_initial_filter(grpc_call* call, grpc_metadata_batch* b) {
   if (b->idx.named.content_encoding != nullptr) {
     if (b->idx.named.grpc_encoding != nullptr) {
       gpr_log(GPR_ERROR,
               "Received both content-encoding and grpc-encoding header. "
               "Ignoring grpc-encoding.");
-      grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.grpc_encoding);
+      grpc_metadata_batch_remove(b, b->idx.named.grpc_encoding);
     }
     GPR_TIMER_BEGIN("incoming_stream_compression_algorithm", 0);
     set_incoming_stream_compression_algorithm(
         call, decode_stream_compression(b->idx.named.content_encoding->md));
     GPR_TIMER_END("incoming_stream_compression_algorithm", 0);
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.content_encoding);
+    grpc_metadata_batch_remove(b, b->idx.named.content_encoding);
   } else if (b->idx.named.grpc_encoding != nullptr) {
     GPR_TIMER_BEGIN("incoming_compression_algorithm", 0);
     set_incoming_compression_algorithm(
         call, decode_compression(b->idx.named.grpc_encoding->md));
     GPR_TIMER_END("incoming_compression_algorithm", 0);
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.grpc_encoding);
+    grpc_metadata_batch_remove(b, b->idx.named.grpc_encoding);
   }
   if (b->idx.named.grpc_accept_encoding != nullptr) {
     GPR_TIMER_BEGIN("encodings_accepted_by_peer", 0);
-    set_encodings_accepted_by_peer(exec_ctx, call,
-                                   b->idx.named.grpc_accept_encoding->md);
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.grpc_accept_encoding);
+    set_encodings_accepted_by_peer(call, b->idx.named.grpc_accept_encoding->md);
+    grpc_metadata_batch_remove(b, b->idx.named.grpc_accept_encoding);
     GPR_TIMER_END("encodings_accepted_by_peer", 0);
   }
   if (b->idx.named.accept_encoding != nullptr) {
     GPR_TIMER_BEGIN("stream_encodings_accepted_by_peer", 0);
-    set_stream_encodings_accepted_by_peer(exec_ctx, call,
+    set_stream_encodings_accepted_by_peer(call,
                                           b->idx.named.accept_encoding->md);
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.accept_encoding);
+    grpc_metadata_batch_remove(b, b->idx.named.accept_encoding);
     GPR_TIMER_END("stream_encodings_accepted_by_peer", 0);
   }
   publish_app_metadata(call, b, false);
 }
 
-static void recv_trailing_filter(grpc_exec_ctx* exec_ctx, void* args,
-                                 grpc_metadata_batch* b) {
+static void recv_trailing_filter(void* args, grpc_metadata_batch* b) {
   grpc_call* call = (grpc_call*)args;
   if (b->idx.named.grpc_status != nullptr) {
     uint32_t status_code = decode_status(b->idx.named.grpc_status->md);
@@ -1174,13 +1151,13 @@ static void recv_trailing_filter(grpc_exec_ctx* exec_ctx, void* args,
       error = grpc_error_set_str(
           error, GRPC_ERROR_STR_GRPC_MESSAGE,
           grpc_slice_ref_internal(GRPC_MDVALUE(b->idx.named.grpc_message->md)));
-      grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.grpc_message);
+      grpc_metadata_batch_remove(b, b->idx.named.grpc_message);
     } else if (error != GRPC_ERROR_NONE) {
       error = grpc_error_set_str(error, GRPC_ERROR_STR_GRPC_MESSAGE,
                                  grpc_empty_slice());
     }
-    set_status_from_error(exec_ctx, call, STATUS_FROM_WIRE, error);
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.grpc_status);
+    set_status_from_error(call, STATUS_FROM_WIRE, error);
+    grpc_metadata_batch_remove(b, b->idx.named.grpc_status);
   }
   publish_app_metadata(call, b, true);
 }
@@ -1257,12 +1234,12 @@ static batch_control* allocate_batch_control(grpc_call* call,
   return bctl;
 }
 
-static void finish_batch_completion(grpc_exec_ctx* exec_ctx, void* user_data,
+static void finish_batch_completion(void* user_data,
                                     grpc_cq_completion* storage) {
   batch_control* bctl = (batch_control*)user_data;
   grpc_call* call = bctl->call;
   bctl->call = nullptr;
-  GRPC_CALL_INTERNAL_UNREF(exec_ctx, call, "completion");
+  GRPC_CALL_INTERNAL_UNREF(call, "completion");
 }
 
 static grpc_error* consolidate_batch_errors(batch_control* bctl) {
@@ -1286,15 +1263,13 @@ static grpc_error* consolidate_batch_errors(batch_control* bctl) {
   }
 }
 
-static void post_batch_completion(grpc_exec_ctx* exec_ctx,
-                                  batch_control* bctl) {
+static void post_batch_completion(batch_control* bctl) {
   grpc_call* next_child_call;
   grpc_call* call = bctl->call;
   grpc_error* error = consolidate_batch_errors(bctl);
 
   if (bctl->op.send_initial_metadata) {
     grpc_metadata_batch_destroy(
-        exec_ctx,
         &call->metadata_batch[0 /* is_receiving */][0 /* is_trailing */]);
   }
   if (bctl->op.send_message) {
@@ -1302,13 +1277,12 @@ static void post_batch_completion(grpc_exec_ctx* exec_ctx,
   }
   if (bctl->op.send_trailing_metadata) {
     grpc_metadata_batch_destroy(
-        exec_ctx,
         &call->metadata_batch[0 /* is_receiving */][1 /* is_trailing */]);
   }
   if (bctl->op.recv_trailing_metadata) {
     grpc_metadata_batch* md =
         &call->metadata_batch[1 /* is_receiving */][1 /* is_trailing */];
-    recv_trailing_filter(exec_ctx, call, md);
+    recv_trailing_filter(call, md);
 
     /* propagate cancellation to any interested children */
     gpr_atm_rel_store(&call->received_final_op_atm, 1);
@@ -1322,9 +1296,9 @@ static void post_batch_completion(grpc_exec_ctx* exec_ctx,
           next_child_call = child->child->sibling_next;
           if (child->cancellation_is_inherited) {
             GRPC_CALL_INTERNAL_REF(child, "propagate_cancel");
-            cancel_with_error(exec_ctx, child, STATUS_FROM_API_OVERRIDE,
+            cancel_with_error(child, STATUS_FROM_API_OVERRIDE,
                               GRPC_ERROR_CANCELLED);
-            GRPC_CALL_INTERNAL_UNREF(exec_ctx, child, "propagate_cancel");
+            GRPC_CALL_INTERNAL_UNREF(child, "propagate_cancel");
           }
           child = next_child_call;
         } while (child != pc->first_child);
@@ -1333,12 +1307,12 @@ static void post_batch_completion(grpc_exec_ctx* exec_ctx,
     }
 
     if (call->is_client) {
-      get_final_status(exec_ctx, call, set_status_value_directly,
+      get_final_status(call, set_status_value_directly,
                        call->final_op.client.status,
                        call->final_op.client.status_details,
                        call->final_op.client.error_string);
     } else {
-      get_final_status(exec_ctx, call, set_cancelled_value,
+      get_final_status(call, set_cancelled_value,
                        call->final_op.server.cancelled, nullptr, nullptr);
     }
 
@@ -1354,25 +1328,24 @@ static void post_batch_completion(grpc_exec_ctx* exec_ctx,
   if (bctl->completion_data.notify_tag.is_closure) {
     /* unrefs bctl->error */
     bctl->call = nullptr;
-    GRPC_CLOSURE_RUN(
-        exec_ctx, (grpc_closure*)bctl->completion_data.notify_tag.tag, error);
-    GRPC_CALL_INTERNAL_UNREF(exec_ctx, call, "completion");
+    GRPC_CLOSURE_RUN((grpc_closure*)bctl->completion_data.notify_tag.tag,
+                     error);
+    GRPC_CALL_INTERNAL_UNREF(call, "completion");
   } else {
     /* unrefs bctl->error */
-    grpc_cq_end_op(
-        exec_ctx, bctl->call->cq, bctl->completion_data.notify_tag.tag, error,
-        finish_batch_completion, bctl, &bctl->completion_data.cq_completion);
+    grpc_cq_end_op(bctl->call->cq, bctl->completion_data.notify_tag.tag, error,
+                   finish_batch_completion, bctl,
+                   &bctl->completion_data.cq_completion);
   }
 }
 
-static void finish_batch_step(grpc_exec_ctx* exec_ctx, batch_control* bctl) {
+static void finish_batch_step(batch_control* bctl) {
   if (gpr_unref(&bctl->steps_to_complete)) {
-    post_batch_completion(exec_ctx, bctl);
+    post_batch_completion(bctl);
   }
 }
 
-static void continue_receiving_slices(grpc_exec_ctx* exec_ctx,
-                                      batch_control* bctl) {
+static void continue_receiving_slices(batch_control* bctl) {
   grpc_error* error;
   grpc_call* call = bctl->call;
   for (;;) {
@@ -1380,25 +1353,25 @@ static void continue_receiving_slices(grpc_exec_ctx* exec_ctx,
                        (*call->receiving_buffer)->data.raw.slice_buffer.length;
     if (remaining == 0) {
       call->receiving_message = 0;
-      grpc_byte_stream_destroy(exec_ctx, call->receiving_stream);
+      grpc_byte_stream_destroy(call->receiving_stream);
       call->receiving_stream = nullptr;
-      finish_batch_step(exec_ctx, bctl);
+      finish_batch_step(bctl);
       return;
     }
-    if (grpc_byte_stream_next(exec_ctx, call->receiving_stream, remaining,
+    if (grpc_byte_stream_next(call->receiving_stream, remaining,
                               &call->receiving_slice_ready)) {
-      error = grpc_byte_stream_pull(exec_ctx, call->receiving_stream,
-                                    &call->receiving_slice);
+      error =
+          grpc_byte_stream_pull(call->receiving_stream, &call->receiving_slice);
       if (error == GRPC_ERROR_NONE) {
         grpc_slice_buffer_add(&(*call->receiving_buffer)->data.raw.slice_buffer,
                               call->receiving_slice);
       } else {
-        grpc_byte_stream_destroy(exec_ctx, call->receiving_stream);
+        grpc_byte_stream_destroy(call->receiving_stream);
         call->receiving_stream = nullptr;
         grpc_byte_buffer_destroy(*call->receiving_buffer);
         *call->receiving_buffer = nullptr;
         call->receiving_message = 0;
-        finish_batch_step(exec_ctx, bctl);
+        finish_batch_step(bctl);
         return;
       }
     } else {
@@ -1407,8 +1380,7 @@ static void continue_receiving_slices(grpc_exec_ctx* exec_ctx,
   }
 }
 
-static void receiving_slice_ready(grpc_exec_ctx* exec_ctx, void* bctlp,
-                                  grpc_error* error) {
+static void receiving_slice_ready(void* bctlp, grpc_error* error) {
   batch_control* bctl = (batch_control*)bctlp;
   grpc_call* call = bctl->call;
   grpc_byte_stream* bs = call->receiving_stream;
@@ -1416,11 +1388,11 @@ static void receiving_slice_ready(grpc_exec_ctx* exec_ctx, void* bctlp,
 
   if (error == GRPC_ERROR_NONE) {
     grpc_slice slice;
-    error = grpc_byte_stream_pull(exec_ctx, bs, &slice);
+    error = grpc_byte_stream_pull(bs, &slice);
     if (error == GRPC_ERROR_NONE) {
       grpc_slice_buffer_add(&(*call->receiving_buffer)->data.raw.slice_buffer,
                             slice);
-      continue_receiving_slices(exec_ctx, bctl);
+      continue_receiving_slices(bctl);
     } else {
       /* Error returned by grpc_byte_stream_pull needs to be released manually
        */
@@ -1432,25 +1404,24 @@ static void receiving_slice_ready(grpc_exec_ctx* exec_ctx, void* bctlp,
     if (grpc_trace_operation_failures.enabled()) {
       GRPC_LOG_IF_ERROR("receiving_slice_ready", GRPC_ERROR_REF(error));
     }
-    grpc_byte_stream_destroy(exec_ctx, call->receiving_stream);
+    grpc_byte_stream_destroy(call->receiving_stream);
     call->receiving_stream = nullptr;
     grpc_byte_buffer_destroy(*call->receiving_buffer);
     *call->receiving_buffer = nullptr;
     call->receiving_message = 0;
-    finish_batch_step(exec_ctx, bctl);
+    finish_batch_step(bctl);
     if (release_error) {
       GRPC_ERROR_UNREF(error);
     }
   }
 }
 
-static void process_data_after_md(grpc_exec_ctx* exec_ctx,
-                                  batch_control* bctl) {
+static void process_data_after_md(batch_control* bctl) {
   grpc_call* call = bctl->call;
   if (call->receiving_stream == nullptr) {
     *call->receiving_buffer = nullptr;
     call->receiving_message = 0;
-    finish_batch_step(exec_ctx, bctl);
+    finish_batch_step(bctl);
   } else {
     call->test_only_last_message_flags = call->receiving_stream->flags;
     if ((call->receiving_stream->flags & GRPC_WRITE_INTERNAL_COMPRESS) &&
@@ -1462,46 +1433,42 @@ static void process_data_after_md(grpc_exec_ctx* exec_ctx,
     }
     GRPC_CLOSURE_INIT(&call->receiving_slice_ready, receiving_slice_ready, bctl,
                       grpc_schedule_on_exec_ctx);
-    continue_receiving_slices(exec_ctx, bctl);
+    continue_receiving_slices(bctl);
   }
 }
 
-static void receiving_stream_ready(grpc_exec_ctx* exec_ctx, void* bctlp,
-                                   grpc_error* error) {
+static void receiving_stream_ready(void* bctlp, grpc_error* error) {
   batch_control* bctl = (batch_control*)bctlp;
   grpc_call* call = bctl->call;
   if (error != GRPC_ERROR_NONE) {
     if (call->receiving_stream != nullptr) {
-      grpc_byte_stream_destroy(exec_ctx, call->receiving_stream);
+      grpc_byte_stream_destroy(call->receiving_stream);
       call->receiving_stream = nullptr;
     }
-    add_batch_error(exec_ctx, bctl, GRPC_ERROR_REF(error), true);
-    cancel_with_error(exec_ctx, call, STATUS_FROM_SURFACE,
-                      GRPC_ERROR_REF(error));
+    add_batch_error(bctl, GRPC_ERROR_REF(error), true);
+    cancel_with_error(call, STATUS_FROM_SURFACE, GRPC_ERROR_REF(error));
   }
   /* If recv_state is RECV_NONE, we will save the batch_control
    * object with rel_cas, and will not use it after the cas. Its corresponding
    * acq_load is in receiving_initial_metadata_ready() */
   if (error != GRPC_ERROR_NONE || call->receiving_stream == nullptr ||
       !gpr_atm_rel_cas(&call->recv_state, RECV_NONE, (gpr_atm)bctlp)) {
-    process_data_after_md(exec_ctx, bctl);
+    process_data_after_md(bctl);
   }
 }
 
 // The recv_message_ready callback used when sending a batch containing
 // a recv_message op down the filter stack.  Yields the call combiner
 // before processing the received message.
-static void receiving_stream_ready_in_call_combiner(grpc_exec_ctx* exec_ctx,
-                                                    void* bctlp,
+static void receiving_stream_ready_in_call_combiner(void* bctlp,
                                                     grpc_error* error) {
   batch_control* bctl = (batch_control*)bctlp;
   grpc_call* call = bctl->call;
-  GRPC_CALL_COMBINER_STOP(exec_ctx, &call->call_combiner, "recv_message_ready");
-  receiving_stream_ready(exec_ctx, bctlp, error);
+  GRPC_CALL_COMBINER_STOP(&call->call_combiner, "recv_message_ready");
+  receiving_stream_ready(bctlp, error);
 }
 
-static void validate_filtered_metadata(grpc_exec_ctx* exec_ctx,
-                                       batch_control* bctl) {
+static void validate_filtered_metadata(batch_control* bctl) {
   grpc_call* call = bctl->call;
   /* validate compression algorithms */
   if (call->incoming_stream_compression_algorithm !=
@@ -1515,8 +1482,8 @@ static void validate_filtered_metadata(grpc_exec_ctx* exec_ctx,
       gpr_asprintf(&error_msg,
                    "Invalid stream compression algorithm value '%d'.", algo);
       gpr_log(GPR_ERROR, "%s", error_msg);
-      cancel_with_status(exec_ctx, call, STATUS_FROM_SURFACE,
-                         GRPC_STATUS_UNIMPLEMENTED, error_msg);
+      cancel_with_status(call, STATUS_FROM_SURFACE, GRPC_STATUS_UNIMPLEMENTED,
+                         error_msg);
     } else if (grpc_compression_options_is_stream_compression_algorithm_enabled(
                    &compression_options, algo) == 0) {
       /* check if algorithm is supported by current channel config */
@@ -1525,8 +1492,8 @@ static void validate_filtered_metadata(grpc_exec_ctx* exec_ctx,
       gpr_asprintf(&error_msg, "Stream compression algorithm '%s' is disabled.",
                    algo_name);
       gpr_log(GPR_ERROR, "%s", error_msg);
-      cancel_with_status(exec_ctx, call, STATUS_FROM_SURFACE,
-                         GRPC_STATUS_UNIMPLEMENTED, error_msg);
+      cancel_with_status(call, STATUS_FROM_SURFACE, GRPC_STATUS_UNIMPLEMENTED,
+                         error_msg);
     }
     gpr_free(error_msg);
 
@@ -1556,8 +1523,8 @@ static void validate_filtered_metadata(grpc_exec_ctx* exec_ctx,
       gpr_asprintf(&error_msg, "Invalid compression algorithm value '%d'.",
                    algo);
       gpr_log(GPR_ERROR, "%s", error_msg);
-      cancel_with_status(exec_ctx, call, STATUS_FROM_SURFACE,
-                         GRPC_STATUS_UNIMPLEMENTED, error_msg);
+      cancel_with_status(call, STATUS_FROM_SURFACE, GRPC_STATUS_UNIMPLEMENTED,
+                         error_msg);
     } else if (grpc_compression_options_is_algorithm_enabled(
                    &compression_options, algo) == 0) {
       /* check if algorithm is supported by current channel config */
@@ -1566,8 +1533,8 @@ static void validate_filtered_metadata(grpc_exec_ctx* exec_ctx,
       gpr_asprintf(&error_msg, "Compression algorithm '%s' is disabled.",
                    algo_name);
       gpr_log(GPR_ERROR, "%s", error_msg);
-      cancel_with_status(exec_ctx, call, STATUS_FROM_SURFACE,
-                         GRPC_STATUS_UNIMPLEMENTED, error_msg);
+      cancel_with_status(call, STATUS_FROM_SURFACE, GRPC_STATUS_UNIMPLEMENTED,
+                         error_msg);
     } else {
       call->incoming_compression_algorithm = algo;
     }
@@ -1590,34 +1557,31 @@ static void validate_filtered_metadata(grpc_exec_ctx* exec_ctx,
   }
 }
 
-static void add_batch_error(grpc_exec_ctx* exec_ctx, batch_control* bctl,
-                            grpc_error* error, bool has_cancelled) {
+static void add_batch_error(batch_control* bctl, grpc_error* error,
+                            bool has_cancelled) {
   if (error == GRPC_ERROR_NONE) return;
   int idx = (int)gpr_atm_full_fetch_add(&bctl->num_errors, 1);
   if (idx == 0 && !has_cancelled) {
-    cancel_with_error(exec_ctx, bctl->call, STATUS_FROM_CORE,
-                      GRPC_ERROR_REF(error));
+    cancel_with_error(bctl->call, STATUS_FROM_CORE, GRPC_ERROR_REF(error));
   }
   bctl->errors[idx] = error;
 }
 
-static void receiving_initial_metadata_ready(grpc_exec_ctx* exec_ctx,
-                                             void* bctlp, grpc_error* error) {
+static void receiving_initial_metadata_ready(void* bctlp, grpc_error* error) {
   batch_control* bctl = (batch_control*)bctlp;
   grpc_call* call = bctl->call;
 
-  GRPC_CALL_COMBINER_STOP(exec_ctx, &call->call_combiner,
-                          "recv_initial_metadata_ready");
+  GRPC_CALL_COMBINER_STOP(&call->call_combiner, "recv_initial_metadata_ready");
 
-  add_batch_error(exec_ctx, bctl, GRPC_ERROR_REF(error), false);
+  add_batch_error(bctl, GRPC_ERROR_REF(error), false);
   if (error == GRPC_ERROR_NONE) {
     grpc_metadata_batch* md =
         &call->metadata_batch[1 /* is_receiving */][0 /* is_trailing */];
-    recv_initial_filter(exec_ctx, call, md);
+    recv_initial_filter(call, md);
 
     /* TODO(ctiller): this could be moved into recv_initial_filter now */
     GPR_TIMER_BEGIN("validate_filtered_metadata", 0);
-    validate_filtered_metadata(exec_ctx, bctl);
+    validate_filtered_metadata(bctl);
     GPR_TIMER_END("validate_filtered_metadata", 0);
 
     if (md->deadline != GRPC_MILLIS_INF_FUTURE && !call->is_client) {
@@ -1650,28 +1614,25 @@ static void receiving_initial_metadata_ready(grpc_exec_ctx* exec_ctx,
     }
   }
   if (saved_rsr_closure != nullptr) {
-    GRPC_CLOSURE_RUN(exec_ctx, saved_rsr_closure, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_RUN(saved_rsr_closure, GRPC_ERROR_REF(error));
   }
 
-  finish_batch_step(exec_ctx, bctl);
+  finish_batch_step(bctl);
 }
 
-static void finish_batch(grpc_exec_ctx* exec_ctx, void* bctlp,
-                         grpc_error* error) {
+static void finish_batch(void* bctlp, grpc_error* error) {
   batch_control* bctl = (batch_control*)bctlp;
   grpc_call* call = bctl->call;
-  GRPC_CALL_COMBINER_STOP(exec_ctx, &call->call_combiner, "on_complete");
-  add_batch_error(exec_ctx, bctl, GRPC_ERROR_REF(error), false);
-  finish_batch_step(exec_ctx, bctl);
+  GRPC_CALL_COMBINER_STOP(&call->call_combiner, "on_complete");
+  add_batch_error(bctl, GRPC_ERROR_REF(error), false);
+  finish_batch_step(bctl);
 }
 
-static void free_no_op_completion(grpc_exec_ctx* exec_ctx, void* p,
-                                  grpc_cq_completion* completion) {
+static void free_no_op_completion(void* p, grpc_cq_completion* completion) {
   gpr_free(completion);
 }
 
-static grpc_call_error call_start_batch(grpc_exec_ctx* exec_ctx,
-                                        grpc_call* call, const grpc_op* ops,
+static grpc_call_error call_start_batch(grpc_call* call, const grpc_op* ops,
                                         size_t nops, void* notify_tag,
                                         int is_notify_tag_closure) {
   size_t i;
@@ -1689,11 +1650,10 @@ static grpc_call_error call_start_batch(grpc_exec_ctx* exec_ctx,
     if (!is_notify_tag_closure) {
       GPR_ASSERT(grpc_cq_begin_op(call->cq, notify_tag));
       grpc_cq_end_op(
-          exec_ctx, call->cq, notify_tag, GRPC_ERROR_NONE,
-          free_no_op_completion, nullptr,
+          call->cq, notify_tag, GRPC_ERROR_NONE, free_no_op_completion, nullptr,
           (grpc_cq_completion*)gpr_malloc(sizeof(grpc_cq_completion)));
     } else {
-      GRPC_CLOSURE_SCHED(exec_ctx, (grpc_closure*)notify_tag, GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED((grpc_closure*)notify_tag, GRPC_ERROR_NONE);
     }
     error = GRPC_CALL_OK;
     goto done;
@@ -1793,7 +1753,7 @@ static grpc_call_error call_start_batch(grpc_exec_ctx* exec_ctx,
         stream_op->send_initial_metadata = true;
         call->sent_initial_metadata = true;
         if (!prepare_application_metadata(
-                exec_ctx, call, (int)op->data.send_initial_metadata.count,
+                call, (int)op->data.send_initial_metadata.count,
                 op->data.send_initial_metadata.metadata, 0, call->is_client,
                 &call->compression_md, (int)additional_metadata_count)) {
           error = GRPC_CALL_ERROR_INVALID_METADATA;
@@ -1887,7 +1847,7 @@ static grpc_call_error call_start_batch(grpc_exec_ctx* exec_ctx,
         GPR_ASSERT(call->send_extra_metadata_count == 0);
         call->send_extra_metadata_count = 1;
         call->send_extra_metadata[0].md = grpc_channel_get_reffed_status_elem(
-            exec_ctx, call->channel, op->data.send_status_from_server.status);
+            call->channel, op->data.send_status_from_server.status);
         {
           grpc_error* override_error = GRPC_ERROR_NONE;
           if (op->data.send_status_from_server.status != GRPC_STATUS_OK) {
@@ -1896,7 +1856,7 @@ static grpc_call_error call_start_batch(grpc_exec_ctx* exec_ctx,
           }
           if (op->data.send_status_from_server.status_details != nullptr) {
             call->send_extra_metadata[1].md = grpc_mdelem_from_slices(
-                exec_ctx, GRPC_MDSTR_GRPC_MESSAGE,
+                GRPC_MDSTR_GRPC_MESSAGE,
                 grpc_slice_ref_internal(
                     *op->data.send_status_from_server.status_details));
             call->send_extra_metadata_count++;
@@ -1907,16 +1867,15 @@ static grpc_call_error call_start_batch(grpc_exec_ctx* exec_ctx,
                                    grpc_slice_from_copied_string(msg));
             gpr_free(msg);
           }
-          set_status_from_error(exec_ctx, call, STATUS_FROM_API_OVERRIDE,
-                                override_error);
+          set_status_from_error(call, STATUS_FROM_API_OVERRIDE, override_error);
         }
         if (!prepare_application_metadata(
-                exec_ctx, call,
+                call,
                 (int)op->data.send_status_from_server.trailing_metadata_count,
                 op->data.send_status_from_server.trailing_metadata, 1, 1,
                 nullptr, 0)) {
           for (int n = 0; n < call->send_extra_metadata_count; n++) {
-            GRPC_MDELEM_UNREF(exec_ctx, call->send_extra_metadata[n].md);
+            GRPC_MDELEM_UNREF(call->send_extra_metadata[n].md);
           }
           call->send_extra_metadata_count = 0;
           error = GRPC_CALL_ERROR_INVALID_METADATA;
@@ -2045,7 +2004,7 @@ static grpc_call_error call_start_batch(grpc_exec_ctx* exec_ctx,
   stream_op->on_complete = &bctl->finish_batch;
   gpr_atm_rel_store(&call->any_ops_sent_atm, 1);
 
-  execute_batch(exec_ctx, call, stream_op, &bctl->start_batch);
+  execute_batch(call, stream_op, &bctl->start_batch);
 
 done:
   GPR_TIMER_END("grpc_call_start_batch", 0);
@@ -2055,15 +2014,15 @@ done_with_error:
   /* reverse any mutations that occured */
   if (stream_op->send_initial_metadata) {
     call->sent_initial_metadata = false;
-    grpc_metadata_batch_clear(exec_ctx, &call->metadata_batch[0][0]);
+    grpc_metadata_batch_clear(&call->metadata_batch[0][0]);
   }
   if (stream_op->send_message) {
     call->sending_message = false;
-    grpc_byte_stream_destroy(exec_ctx, &call->sending_stream.base);
+    grpc_byte_stream_destroy(&call->sending_stream.base);
   }
   if (stream_op->send_trailing_metadata) {
     call->sent_final_op = false;
-    grpc_metadata_batch_clear(exec_ctx, &call->metadata_batch[0][1]);
+    grpc_metadata_batch_clear(&call->metadata_batch[0][1]);
   }
   if (stream_op->recv_initial_metadata) {
     call->received_initial_metadata = false;
@@ -2079,7 +2038,7 @@ done_with_error:
 
 grpc_call_error grpc_call_start_batch(grpc_call* call, const grpc_op* ops,
                                       size_t nops, void* tag, void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_call_error err;
 
   GRPC_API_TRACE(
@@ -2090,19 +2049,17 @@ grpc_call_error grpc_call_start_batch(grpc_call* call, const grpc_op* ops,
   if (reserved != nullptr) {
     err = GRPC_CALL_ERROR;
   } else {
-    err = call_start_batch(&exec_ctx, call, ops, nops, tag, 0);
+    err = call_start_batch(call, ops, nops, tag, 0);
   }
 
-  grpc_exec_ctx_finish(&exec_ctx);
   return err;
 }
 
-grpc_call_error grpc_call_start_batch_and_execute(grpc_exec_ctx* exec_ctx,
-                                                  grpc_call* call,
+grpc_call_error grpc_call_start_batch_and_execute(grpc_call* call,
                                                   const grpc_op* ops,
                                                   size_t nops,
                                                   grpc_closure* closure) {
-  return call_start_batch(exec_ctx, call, ops, nops, closure, 1);
+  return call_start_batch(call, ops, nops, closure, 1);
 }
 
 void grpc_call_context_set(grpc_call* call, grpc_context_index elem,
diff --git a/src/core/lib/surface/call.h b/src/core/lib/surface/call.h
index 1d2e266717..189329ccc4 100644
--- a/src/core/lib/surface/call.h
+++ b/src/core/lib/surface/call.h
@@ -26,8 +26,7 @@
 #include <grpc/grpc.h>
 #include <grpc/impl/codegen/compression_types.h>
 
-typedef void (*grpc_ioreq_completion_func)(grpc_exec_ctx* exec_ctx,
-                                           grpc_call* call, int success,
+typedef void (*grpc_ioreq_completion_func)(grpc_call* call, int success,
                                            void* user_data);
 
 typedef struct grpc_call_create_args {
@@ -51,33 +50,28 @@ typedef struct grpc_call_create_args {
 /* Create a new call based on \a args.
    Regardless of success or failure, always returns a valid new call into *call
    */
-grpc_error* grpc_call_create(grpc_exec_ctx* exec_ctx,
-                             const grpc_call_create_args* args,
+grpc_error* grpc_call_create(const grpc_call_create_args* args,
                              grpc_call** call);
 
-void grpc_call_set_completion_queue(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                                    grpc_completion_queue* cq);
+void grpc_call_set_completion_queue(grpc_call* call, grpc_completion_queue* cq);
 
 #ifndef NDEBUG
 void grpc_call_internal_ref(grpc_call* call, const char* reason);
-void grpc_call_internal_unref(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                              const char* reason);
+void grpc_call_internal_unref(grpc_call* call, const char* reason);
 #define GRPC_CALL_INTERNAL_REF(call, reason) \
   grpc_call_internal_ref(call, reason)
-#define GRPC_CALL_INTERNAL_UNREF(exec_ctx, call, reason) \
-  grpc_call_internal_unref(exec_ctx, call, reason)
+#define GRPC_CALL_INTERNAL_UNREF(call, reason) \
+  grpc_call_internal_unref(call, reason)
 #else
 void grpc_call_internal_ref(grpc_call* call);
-void grpc_call_internal_unref(grpc_exec_ctx* exec_ctx, grpc_call* call);
+void grpc_call_internal_unref(grpc_call* call);
 #define GRPC_CALL_INTERNAL_REF(call, reason) grpc_call_internal_ref(call)
-#define GRPC_CALL_INTERNAL_UNREF(exec_ctx, call, reason) \
-  grpc_call_internal_unref(exec_ctx, call)
+#define GRPC_CALL_INTERNAL_UNREF(call, reason) grpc_call_internal_unref(call)
 #endif
 
 grpc_call_stack* grpc_call_get_call_stack(grpc_call* call);
 
-grpc_call_error grpc_call_start_batch_and_execute(grpc_exec_ctx* exec_ctx,
-                                                  grpc_call* call,
+grpc_call_error grpc_call_start_batch_and_execute(grpc_call* call,
                                                   const grpc_op* ops,
                                                   size_t nops,
                                                   grpc_closure* closure);
diff --git a/src/core/lib/surface/call_details.cc b/src/core/lib/surface/call_details.cc
index ea9208c7e3..cd0b14586a 100644
--- a/src/core/lib/surface/call_details.cc
+++ b/src/core/lib/surface/call_details.cc
@@ -34,8 +34,7 @@ void grpc_call_details_init(grpc_call_details* cd) {
 
 void grpc_call_details_destroy(grpc_call_details* cd) {
   GRPC_API_TRACE("grpc_call_details_destroy(cd=%p)", 1, (cd));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_unref_internal(&exec_ctx, cd->method);
-  grpc_slice_unref_internal(&exec_ctx, cd->host);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_unref_internal(cd->method);
+  grpc_slice_unref_internal(cd->host);
 }
diff --git a/src/core/lib/surface/channel.cc b/src/core/lib/surface/channel.cc
index 1be734cdb7..cf5e8c2150 100644
--- a/src/core/lib/surface/channel.cc
+++ b/src/core/lib/surface/channel.cc
@@ -69,23 +69,22 @@ struct grpc_channel {
 #define CHANNEL_FROM_TOP_ELEM(top_elem) \
   CHANNEL_FROM_CHANNEL_STACK(grpc_channel_stack_from_top_element(top_elem))
 
-static void destroy_channel(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error);
+static void destroy_channel(void* arg, grpc_error* error);
 
 grpc_channel* grpc_channel_create_with_builder(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder,
+    grpc_channel_stack_builder* builder,
     grpc_channel_stack_type channel_stack_type) {
   char* target = gpr_strdup(grpc_channel_stack_builder_get_target(builder));
   grpc_channel_args* args = grpc_channel_args_copy(
       grpc_channel_stack_builder_get_channel_arguments(builder));
   grpc_channel* channel;
   if (channel_stack_type == GRPC_SERVER_CHANNEL) {
-    GRPC_STATS_INC_SERVER_CHANNELS_CREATED(exec_ctx);
+    GRPC_STATS_INC_SERVER_CHANNELS_CREATED();
   } else {
-    GRPC_STATS_INC_CLIENT_CHANNELS_CREATED(exec_ctx);
+    GRPC_STATS_INC_CLIENT_CHANNELS_CREATED();
   }
   grpc_error* error = grpc_channel_stack_builder_finish(
-      exec_ctx, builder, sizeof(grpc_channel), 1, destroy_channel, nullptr,
+      builder, sizeof(grpc_channel), 1, destroy_channel, nullptr,
       (void**)&channel);
   if (error != GRPC_ERROR_NONE) {
     gpr_log(GPR_ERROR, "channel stack builder failed: %s",
@@ -114,10 +113,10 @@ grpc_channel* grpc_channel_create_with_builder(
       } else {
         if (!GRPC_MDISNULL(channel->default_authority)) {
           /* setting this takes precedence over anything else */
-          GRPC_MDELEM_UNREF(exec_ctx, channel->default_authority);
+          GRPC_MDELEM_UNREF(channel->default_authority);
         }
         channel->default_authority = grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_AUTHORITY,
+            GRPC_MDSTR_AUTHORITY,
             grpc_slice_intern(
                 grpc_slice_from_static_string(args->args[i].value.string)));
       }
@@ -134,7 +133,7 @@ grpc_channel* grpc_channel_create_with_builder(
                   GRPC_SSL_TARGET_NAME_OVERRIDE_ARG);
         } else {
           channel->default_authority = grpc_mdelem_from_slices(
-              exec_ctx, GRPC_MDSTR_AUTHORITY,
+              GRPC_MDSTR_AUTHORITY,
               grpc_slice_intern(
                   grpc_slice_from_static_string(args->args[i].value.string)));
         }
@@ -191,25 +190,23 @@ grpc_channel* grpc_channel_create_with_builder(
   }
 
 done:
-  grpc_channel_args_destroy(exec_ctx, args);
+  grpc_channel_args_destroy(args);
   return channel;
 }
 
-grpc_channel* grpc_channel_create(grpc_exec_ctx* exec_ctx, const char* target,
+grpc_channel* grpc_channel_create(const char* target,
                                   const grpc_channel_args* input_args,
                                   grpc_channel_stack_type channel_stack_type,
                                   grpc_transport* optional_transport) {
   grpc_channel_stack_builder* builder = grpc_channel_stack_builder_create();
-  grpc_channel_stack_builder_set_channel_arguments(exec_ctx, builder,
-                                                   input_args);
+  grpc_channel_stack_builder_set_channel_arguments(builder, input_args);
   grpc_channel_stack_builder_set_target(builder, target);
   grpc_channel_stack_builder_set_transport(builder, optional_transport);
-  if (!grpc_channel_init_create_stack(exec_ctx, builder, channel_stack_type)) {
-    grpc_channel_stack_builder_destroy(exec_ctx, builder);
+  if (!grpc_channel_init_create_stack(builder, channel_stack_type)) {
+    grpc_channel_stack_builder_destroy(builder);
     return nullptr;
   }
-  return grpc_channel_create_with_builder(exec_ctx, builder,
-                                          channel_stack_type);
+  return grpc_channel_create_with_builder(builder, channel_stack_type);
 }
 
 size_t grpc_channel_get_call_size_estimate(grpc_channel* channel) {
@@ -251,18 +248,17 @@ char* grpc_channel_get_target(grpc_channel* channel) {
 
 void grpc_channel_get_info(grpc_channel* channel,
                            const grpc_channel_info* channel_info) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_element* elem =
       grpc_channel_stack_element(CHANNEL_STACK_FROM_CHANNEL(channel), 0);
-  elem->filter->get_channel_info(&exec_ctx, elem, channel_info);
-  grpc_exec_ctx_finish(&exec_ctx);
+  elem->filter->get_channel_info(elem, channel_info);
 }
 
 static grpc_call* grpc_channel_create_call_internal(
-    grpc_exec_ctx* exec_ctx, grpc_channel* channel, grpc_call* parent_call,
-    uint32_t propagation_mask, grpc_completion_queue* cq,
-    grpc_pollset_set* pollset_set_alternative, grpc_mdelem path_mdelem,
-    grpc_mdelem authority_mdelem, grpc_millis deadline) {
+    grpc_channel* channel, grpc_call* parent_call, uint32_t propagation_mask,
+    grpc_completion_queue* cq, grpc_pollset_set* pollset_set_alternative,
+    grpc_mdelem path_mdelem, grpc_mdelem authority_mdelem,
+    grpc_millis deadline) {
   grpc_mdelem send_metadata[2];
   size_t num_metadata = 0;
 
@@ -289,7 +285,7 @@ static grpc_call* grpc_channel_create_call_internal(
   args.send_deadline = deadline;
 
   grpc_call* call;
-  GRPC_LOG_IF_ERROR("call_create", grpc_call_create(exec_ctx, &args, &call));
+  GRPC_LOG_IF_ERROR("call_create", grpc_call_create(&args, &call));
   return call;
 }
 
@@ -300,29 +296,27 @@ grpc_call* grpc_channel_create_call(grpc_channel* channel,
                                     grpc_slice method, const grpc_slice* host,
                                     gpr_timespec deadline, void* reserved) {
   GPR_ASSERT(!reserved);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_call* call = grpc_channel_create_call_internal(
-      &exec_ctx, channel, parent_call, propagation_mask, cq, nullptr,
-      grpc_mdelem_from_slices(&exec_ctx, GRPC_MDSTR_PATH,
-                              grpc_slice_ref_internal(method)),
-      host != nullptr ? grpc_mdelem_from_slices(&exec_ctx, GRPC_MDSTR_AUTHORITY,
+      channel, parent_call, propagation_mask, cq, nullptr,
+      grpc_mdelem_from_slices(GRPC_MDSTR_PATH, grpc_slice_ref_internal(method)),
+      host != nullptr ? grpc_mdelem_from_slices(GRPC_MDSTR_AUTHORITY,
                                                 grpc_slice_ref_internal(*host))
                       : GRPC_MDNULL,
       grpc_timespec_to_millis_round_up(deadline));
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return call;
 }
 
 grpc_call* grpc_channel_create_pollset_set_call(
-    grpc_exec_ctx* exec_ctx, grpc_channel* channel, grpc_call* parent_call,
-    uint32_t propagation_mask, grpc_pollset_set* pollset_set, grpc_slice method,
-    const grpc_slice* host, grpc_millis deadline, void* reserved) {
+    grpc_channel* channel, grpc_call* parent_call, uint32_t propagation_mask,
+    grpc_pollset_set* pollset_set, grpc_slice method, const grpc_slice* host,
+    grpc_millis deadline, void* reserved) {
   GPR_ASSERT(!reserved);
   return grpc_channel_create_call_internal(
-      exec_ctx, channel, parent_call, propagation_mask, nullptr, pollset_set,
-      grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_PATH,
-                              grpc_slice_ref_internal(method)),
-      host != nullptr ? grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_AUTHORITY,
+      channel, parent_call, propagation_mask, nullptr, pollset_set,
+      grpc_mdelem_from_slices(GRPC_MDSTR_PATH, grpc_slice_ref_internal(method)),
+      host != nullptr ? grpc_mdelem_from_slices(GRPC_MDSTR_AUTHORITY,
                                                 grpc_slice_ref_internal(*host))
                       : GRPC_MDNULL,
       deadline);
@@ -335,21 +329,21 @@ void* grpc_channel_register_call(grpc_channel* channel, const char* method,
       "grpc_channel_register_call(channel=%p, method=%s, host=%s, reserved=%p)",
       4, (channel, method, host, reserved));
   GPR_ASSERT(!reserved);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   rc->path = grpc_mdelem_from_slices(
-      &exec_ctx, GRPC_MDSTR_PATH,
+      GRPC_MDSTR_PATH,
       grpc_slice_intern(grpc_slice_from_static_string(method)));
   rc->authority =
       host ? grpc_mdelem_from_slices(
-                 &exec_ctx, GRPC_MDSTR_AUTHORITY,
+                 GRPC_MDSTR_AUTHORITY,
                  grpc_slice_intern(grpc_slice_from_static_string(host)))
            : GRPC_MDNULL;
   gpr_mu_lock(&channel->registered_call_mu);
   rc->next = channel->registered_calls;
   channel->registered_calls = rc;
   gpr_mu_unlock(&channel->registered_call_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return rc;
 }
 
@@ -370,12 +364,12 @@ grpc_call* grpc_channel_create_registered_call(
        registered_call_handle, deadline.tv_sec, deadline.tv_nsec,
        (int)deadline.clock_type, reserved));
   GPR_ASSERT(!reserved);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_call* call = grpc_channel_create_call_internal(
-      &exec_ctx, channel, parent_call, propagation_mask, completion_queue,
-      nullptr, GRPC_MDELEM_REF(rc->path), GRPC_MDELEM_REF(rc->authority),
+      channel, parent_call, propagation_mask, completion_queue, nullptr,
+      GRPC_MDELEM_REF(rc->path), GRPC_MDELEM_REF(rc->authority),
       grpc_timespec_to_millis_round_up(deadline));
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return call;
 }
 
@@ -390,23 +384,21 @@ void grpc_channel_internal_ref(grpc_channel* c REF_ARG) {
   GRPC_CHANNEL_STACK_REF(CHANNEL_STACK_FROM_CHANNEL(c), REF_REASON);
 }
 
-void grpc_channel_internal_unref(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel* c REF_ARG) {
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, CHANNEL_STACK_FROM_CHANNEL(c), REF_REASON);
+void grpc_channel_internal_unref(grpc_channel* c REF_ARG) {
+  GRPC_CHANNEL_STACK_UNREF(CHANNEL_STACK_FROM_CHANNEL(c), REF_REASON);
 }
 
-static void destroy_channel(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void destroy_channel(void* arg, grpc_error* error) {
   grpc_channel* channel = (grpc_channel*)arg;
-  grpc_channel_stack_destroy(exec_ctx, CHANNEL_STACK_FROM_CHANNEL(channel));
+  grpc_channel_stack_destroy(CHANNEL_STACK_FROM_CHANNEL(channel));
   while (channel->registered_calls) {
     registered_call* rc = channel->registered_calls;
     channel->registered_calls = rc->next;
-    GRPC_MDELEM_UNREF(exec_ctx, rc->path);
-    GRPC_MDELEM_UNREF(exec_ctx, rc->authority);
+    GRPC_MDELEM_UNREF(rc->path);
+    GRPC_MDELEM_UNREF(rc->authority);
     gpr_free(rc);
   }
-  GRPC_MDELEM_UNREF(exec_ctx, channel->default_authority);
+  GRPC_MDELEM_UNREF(channel->default_authority);
   gpr_mu_destroy(&channel->registered_call_mu);
   gpr_free(channel->target);
   gpr_free(channel);
@@ -415,16 +407,14 @@ static void destroy_channel(grpc_exec_ctx* exec_ctx, void* arg,
 void grpc_channel_destroy(grpc_channel* channel) {
   grpc_transport_op* op = grpc_make_transport_op(nullptr);
   grpc_channel_element* elem;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_API_TRACE("grpc_channel_destroy(channel=%p)", 1, (channel));
   op->disconnect_with_error =
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel Destroyed");
   elem = grpc_channel_stack_element(CHANNEL_STACK_FROM_CHANNEL(channel), 0);
-  elem->filter->start_transport_op(&exec_ctx, elem, op);
-
-  GRPC_CHANNEL_INTERNAL_UNREF(&exec_ctx, channel, "channel");
+  elem->filter->start_transport_op(elem, op);
 
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CHANNEL_INTERNAL_UNREF(channel, "channel");
 }
 
 grpc_channel_stack* grpc_channel_get_channel_stack(grpc_channel* channel) {
@@ -436,8 +426,7 @@ grpc_compression_options grpc_channel_compression_options(
   return channel->compression_options;
 }
 
-grpc_mdelem grpc_channel_get_reffed_status_elem(grpc_exec_ctx* exec_ctx,
-                                                grpc_channel* channel, int i) {
+grpc_mdelem grpc_channel_get_reffed_status_elem(grpc_channel* channel, int i) {
   char tmp[GPR_LTOA_MIN_BUFSIZE];
   switch (i) {
     case 0:
@@ -448,6 +437,6 @@ grpc_mdelem grpc_channel_get_reffed_status_elem(grpc_exec_ctx* exec_ctx,
       return GRPC_MDELEM_GRPC_STATUS_2;
   }
   gpr_ltoa(i, tmp);
-  return grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_GRPC_STATUS,
+  return grpc_mdelem_from_slices(GRPC_MDSTR_GRPC_STATUS,
                                  grpc_slice_from_copied_string(tmp));
 }
diff --git a/src/core/lib/surface/channel.h b/src/core/lib/surface/channel.h
index a2e53c777d..26d8fceb2f 100644
--- a/src/core/lib/surface/channel.h
+++ b/src/core/lib/surface/channel.h
@@ -23,13 +23,13 @@
 #include "src/core/lib/channel/channel_stack_builder.h"
 #include "src/core/lib/surface/channel_stack_type.h"
 
-grpc_channel* grpc_channel_create(grpc_exec_ctx* exec_ctx, const char* target,
+grpc_channel* grpc_channel_create(const char* target,
                                   const grpc_channel_args* args,
                                   grpc_channel_stack_type channel_stack_type,
                                   grpc_transport* optional_transport);
 
 grpc_channel* grpc_channel_create_with_builder(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder,
+    grpc_channel_stack_builder* builder,
     grpc_channel_stack_type channel_stack_type);
 
 /** Create a call given a grpc_channel, in order to call \a method.
@@ -41,9 +41,9 @@ grpc_channel* grpc_channel_create_with_builder(
     properties from the server call to this new client call, depending on the
     value of \a propagation_mask (see propagation_bits.h for possible values) */
 grpc_call* grpc_channel_create_pollset_set_call(
-    grpc_exec_ctx* exec_ctx, grpc_channel* channel, grpc_call* parent_call,
-    uint32_t propagation_mask, grpc_pollset_set* pollset_set, grpc_slice method,
-    const grpc_slice* host, grpc_millis deadline, void* reserved);
+    grpc_channel* channel, grpc_call* parent_call, uint32_t propagation_mask,
+    grpc_pollset_set* pollset_set, grpc_slice method, const grpc_slice* host,
+    grpc_millis deadline, void* reserved);
 
 /** Get a (borrowed) pointer to this channels underlying channel stack */
 grpc_channel_stack* grpc_channel_get_channel_stack(grpc_channel* channel);
@@ -52,8 +52,7 @@ grpc_channel_stack* grpc_channel_get_channel_stack(grpc_channel* channel);
     status_code.
 
     The returned elem is owned by the caller. */
-grpc_mdelem grpc_channel_get_reffed_status_elem(grpc_exec_ctx* exec_ctx,
-                                                grpc_channel* channel,
+grpc_mdelem grpc_channel_get_reffed_status_elem(grpc_channel* channel,
                                                 int status_code);
 
 size_t grpc_channel_get_call_size_estimate(grpc_channel* channel);
@@ -61,20 +60,18 @@ void grpc_channel_update_call_size_estimate(grpc_channel* channel, size_t size);
 
 #ifndef NDEBUG
 void grpc_channel_internal_ref(grpc_channel* channel, const char* reason);
-void grpc_channel_internal_unref(grpc_exec_ctx* exec_ctx, grpc_channel* channel,
-                                 const char* reason);
+void grpc_channel_internal_unref(grpc_channel* channel, const char* reason);
 #define GRPC_CHANNEL_INTERNAL_REF(channel, reason) \
   grpc_channel_internal_ref(channel, reason)
-#define GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, channel, reason) \
-  grpc_channel_internal_unref(exec_ctx, channel, reason)
+#define GRPC_CHANNEL_INTERNAL_UNREF(channel, reason) \
+  grpc_channel_internal_unref(channel, reason)
 #else
 void grpc_channel_internal_ref(grpc_channel* channel);
-void grpc_channel_internal_unref(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel* channel);
+void grpc_channel_internal_unref(grpc_channel* channel);
 #define GRPC_CHANNEL_INTERNAL_REF(channel, reason) \
   grpc_channel_internal_ref(channel)
-#define GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, channel, reason) \
-  grpc_channel_internal_unref(exec_ctx, channel)
+#define GRPC_CHANNEL_INTERNAL_UNREF(channel, reason) \
+  grpc_channel_internal_unref(channel)
 #endif
 
 /** Return the channel's compression options. */
diff --git a/src/core/lib/surface/channel_init.cc b/src/core/lib/surface/channel_init.cc
index b563537f35..95cbbbd037 100644
--- a/src/core/lib/surface/channel_init.cc
+++ b/src/core/lib/surface/channel_init.cc
@@ -89,8 +89,7 @@ void grpc_channel_init_shutdown(void) {
   }
 }
 
-bool grpc_channel_init_create_stack(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_stack_builder* builder,
+bool grpc_channel_init_create_stack(grpc_channel_stack_builder* builder,
                                     grpc_channel_stack_type type) {
   GPR_ASSERT(g_finalized);
 
@@ -99,7 +98,7 @@ bool grpc_channel_init_create_stack(grpc_exec_ctx* exec_ctx,
 
   for (size_t i = 0; i < g_slots[type].num_slots; i++) {
     const stage_slot* slot = &g_slots[type].slots[i];
-    if (!slot->fn(exec_ctx, builder, slot->arg)) {
+    if (!slot->fn(builder, slot->arg)) {
       return false;
     }
   }
diff --git a/src/core/lib/surface/channel_init.h b/src/core/lib/surface/channel_init.h
index 556ecc4147..d702f0f325 100644
--- a/src/core/lib/surface/channel_init.h
+++ b/src/core/lib/surface/channel_init.h
@@ -32,8 +32,7 @@
 
 /// One stage of mutation: call functions against \a builder to influence the
 /// finally constructed channel stack
-typedef bool (*grpc_channel_init_stage)(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_stack_builder* builder,
+typedef bool (*grpc_channel_init_stage)(grpc_channel_stack_builder* builder,
                                         void* arg);
 
 /// Global initialization of the system
@@ -66,8 +65,7 @@ void grpc_channel_init_shutdown(void);
 /// \a optional_transport is either NULL or a constructed transport object
 /// Returns a pointer to the base of the memory allocated (the actual channel
 /// stack object will be prefix_bytes past that pointer)
-bool grpc_channel_init_create_stack(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_stack_builder* builder,
+bool grpc_channel_init_create_stack(grpc_channel_stack_builder* builder,
                                     grpc_channel_stack_type type);
 
 #endif /* GRPC_CORE_LIB_SURFACE_CHANNEL_INIT_H */
diff --git a/src/core/lib/surface/channel_ping.cc b/src/core/lib/surface/channel_ping.cc
index e8f47f01cf..a030d8d0f0 100644
--- a/src/core/lib/surface/channel_ping.cc
+++ b/src/core/lib/surface/channel_ping.cc
@@ -33,15 +33,14 @@ typedef struct {
   grpc_cq_completion completion_storage;
 } ping_result;
 
-static void ping_destroy(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_cq_completion* storage) {
+static void ping_destroy(void* arg, grpc_cq_completion* storage) {
   gpr_free(arg);
 }
 
-static void ping_done(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void ping_done(void* arg, grpc_error* error) {
   ping_result* pr = (ping_result*)arg;
-  grpc_cq_end_op(exec_ctx, pr->cq, pr->tag, GRPC_ERROR_REF(error), ping_destroy,
-                 pr, &pr->completion_storage);
+  grpc_cq_end_op(pr->cq, pr->tag, GRPC_ERROR_REF(error), ping_destroy, pr,
+                 &pr->completion_storage);
 }
 
 void grpc_channel_ping(grpc_channel* channel, grpc_completion_queue* cq,
@@ -52,14 +51,13 @@ void grpc_channel_ping(grpc_channel* channel, grpc_completion_queue* cq,
   ping_result* pr = (ping_result*)gpr_malloc(sizeof(*pr));
   grpc_channel_element* top_elem =
       grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GPR_ASSERT(reserved == nullptr);
   pr->tag = tag;
   pr->cq = cq;
   GRPC_CLOSURE_INIT(&pr->closure, ping_done, pr, grpc_schedule_on_exec_ctx);
-  op->send_ping = &pr->closure;
+  op->send_ping.on_ack = &pr->closure;
   op->bind_pollset = grpc_cq_pollset(cq);
   GPR_ASSERT(grpc_cq_begin_op(cq, tag));
-  top_elem->filter->start_transport_op(&exec_ctx, top_elem, op);
-  grpc_exec_ctx_finish(&exec_ctx);
+  top_elem->filter->start_transport_op(top_elem, op);
 }
diff --git a/src/core/lib/surface/completion_queue.cc b/src/core/lib/surface/completion_queue.cc
index 98d7e35943..aa5808da4c 100644
--- a/src/core/lib/surface/completion_queue.cc
+++ b/src/core/lib/surface/completion_queue.cc
@@ -62,13 +62,12 @@ typedef struct {
   bool can_listen;
   size_t (*size)(void);
   void (*init)(grpc_pollset* pollset, gpr_mu** mu);
-  grpc_error* (*kick)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+  grpc_error* (*kick)(grpc_pollset* pollset,
                       grpc_pollset_worker* specific_worker);
-  grpc_error* (*work)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                      grpc_pollset_worker** worker, grpc_millis deadline);
-  void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                   grpc_closure* closure);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset);
+  grpc_error* (*work)(grpc_pollset* pollset, grpc_pollset_worker** worker,
+                      grpc_millis deadline);
+  void (*shutdown)(grpc_pollset* pollset, grpc_closure* closure);
+  void (*destroy)(grpc_pollset* pollset);
 } cq_poller_vtable;
 
 typedef struct non_polling_worker {
@@ -94,14 +93,12 @@ static void non_polling_poller_init(grpc_pollset* pollset, gpr_mu** mu) {
   *mu = &npp->mu;
 }
 
-static void non_polling_poller_destroy(grpc_exec_ctx* exec_ctx,
-                                       grpc_pollset* pollset) {
+static void non_polling_poller_destroy(grpc_pollset* pollset) {
   non_polling_poller* npp = (non_polling_poller*)pollset;
   gpr_mu_destroy(&npp->mu);
 }
 
-static grpc_error* non_polling_poller_work(grpc_exec_ctx* exec_ctx,
-                                           grpc_pollset* pollset,
+static grpc_error* non_polling_poller_work(grpc_pollset* pollset,
                                            grpc_pollset_worker** worker,
                                            grpc_millis deadline) {
   non_polling_poller* npp = (non_polling_poller*)pollset;
@@ -118,16 +115,16 @@ static grpc_error* non_polling_poller_work(grpc_exec_ctx* exec_ctx,
   }
   w.kicked = false;
   gpr_timespec deadline_ts =
-      grpc_millis_to_timespec(deadline, GPR_CLOCK_REALTIME);
+      grpc_millis_to_timespec(deadline, GPR_CLOCK_MONOTONIC);
   while (!npp->shutdown && !w.kicked &&
          !gpr_cv_wait(&w.cv, &npp->mu, deadline_ts))
     ;
-  grpc_exec_ctx_invalidate_now(exec_ctx);
+  grpc_core::ExecCtx::Get()->InvalidateNow();
   if (&w == npp->root) {
     npp->root = w.next;
     if (&w == npp->root) {
       if (npp->shutdown) {
-        GRPC_CLOSURE_SCHED(exec_ctx, npp->shutdown, GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(npp->shutdown, GRPC_ERROR_NONE);
       }
       npp->root = nullptr;
     }
@@ -140,8 +137,7 @@ static grpc_error* non_polling_poller_work(grpc_exec_ctx* exec_ctx,
 }
 
 static grpc_error* non_polling_poller_kick(
-    grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-    grpc_pollset_worker* specific_worker) {
+    grpc_pollset* pollset, grpc_pollset_worker* specific_worker) {
   non_polling_poller* p = (non_polling_poller*)pollset;
   if (specific_worker == nullptr)
     specific_worker = (grpc_pollset_worker*)p->root;
@@ -155,14 +151,13 @@ static grpc_error* non_polling_poller_kick(
   return GRPC_ERROR_NONE;
 }
 
-static void non_polling_poller_shutdown(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset* pollset,
+static void non_polling_poller_shutdown(grpc_pollset* pollset,
                                         grpc_closure* closure) {
   non_polling_poller* p = (non_polling_poller*)pollset;
   GPR_ASSERT(closure != nullptr);
   p->shutdown = closure;
   if (p->root == nullptr) {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
   } else {
     non_polling_worker* w = p->root;
     do {
@@ -189,13 +184,11 @@ typedef struct cq_vtable {
   grpc_cq_completion_type cq_completion_type;
   size_t data_size;
   void (*init)(void* data);
-  void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cq);
+  void (*shutdown)(grpc_completion_queue* cq);
   void (*destroy)(void* data);
   bool (*begin_op)(grpc_completion_queue* cq, void* tag);
-  void (*end_op)(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cq, void* tag,
-                 grpc_error* error,
-                 void (*done)(grpc_exec_ctx* exec_ctx, void* done_arg,
-                              grpc_cq_completion* storage),
+  void (*end_op)(grpc_completion_queue* cq, void* tag, grpc_error* error,
+                 void (*done)(void* done_arg, grpc_cq_completion* storage),
                  void* done_arg, grpc_cq_completion* storage);
   grpc_event (*next)(grpc_completion_queue* cq, gpr_timespec deadline,
                      void* reserved);
@@ -280,31 +273,23 @@ struct grpc_completion_queue {
 };
 
 /* Forward declarations */
-static void cq_finish_shutdown_next(grpc_exec_ctx* exec_ctx,
-                                    grpc_completion_queue* cq);
-static void cq_finish_shutdown_pluck(grpc_exec_ctx* exec_ctx,
-                                     grpc_completion_queue* cq);
-static void cq_shutdown_next(grpc_exec_ctx* exec_ctx,
-                             grpc_completion_queue* cq);
-static void cq_shutdown_pluck(grpc_exec_ctx* exec_ctx,
-                              grpc_completion_queue* cq);
+static void cq_finish_shutdown_next(grpc_completion_queue* cq);
+static void cq_finish_shutdown_pluck(grpc_completion_queue* cq);
+static void cq_shutdown_next(grpc_completion_queue* cq);
+static void cq_shutdown_pluck(grpc_completion_queue* cq);
 
 static bool cq_begin_op_for_next(grpc_completion_queue* cq, void* tag);
 static bool cq_begin_op_for_pluck(grpc_completion_queue* cq, void* tag);
 
-static void cq_end_op_for_next(grpc_exec_ctx* exec_ctx,
-                               grpc_completion_queue* cq, void* tag,
+static void cq_end_op_for_next(grpc_completion_queue* cq, void* tag,
                                grpc_error* error,
-                               void (*done)(grpc_exec_ctx* exec_ctx,
-                                            void* done_arg,
+                               void (*done)(void* done_arg,
                                             grpc_cq_completion* storage),
                                void* done_arg, grpc_cq_completion* storage);
 
-static void cq_end_op_for_pluck(grpc_exec_ctx* exec_ctx,
-                                grpc_completion_queue* cq, void* tag,
+static void cq_end_op_for_pluck(grpc_completion_queue* cq, void* tag,
                                 grpc_error* error,
-                                void (*done)(grpc_exec_ctx* exec_ctx,
-                                             void* done_arg,
+                                void (*done)(void* done_arg,
                                              grpc_cq_completion* storage),
                                 void* done_arg, grpc_cq_completion* storage);
 
@@ -346,8 +331,7 @@ grpc_core::TraceFlag grpc_cq_event_timeout_trace(true, "queue_timeout");
     gpr_free(_ev);                                                         \
   }
 
-static void on_pollset_shutdown_done(grpc_exec_ctx* exec_ctx, void* cq,
-                                     grpc_error* error);
+static void on_pollset_shutdown_done(void* cq, grpc_error* error);
 
 void grpc_cq_global_init() {
   gpr_tls_init(&g_cached_event);
@@ -369,19 +353,18 @@ int grpc_completion_queue_thread_local_cache_flush(grpc_completion_queue* cq,
   if (storage != nullptr &&
       (grpc_completion_queue*)gpr_tls_get(&g_cached_cq) == cq) {
     *tag = storage->tag;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     *ok = (storage->next & (uintptr_t)(1)) == 1;
-    storage->done(&exec_ctx, storage->done_arg, storage);
+    storage->done(storage->done_arg, storage);
     ret = 1;
     cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
     if (gpr_atm_full_fetch_add(&cqd->pending_events, -1) == 1) {
       GRPC_CQ_INTERNAL_REF(cq, "shutting_down");
       gpr_mu_lock(cq->mu);
-      cq_finish_shutdown_next(&exec_ctx, cq);
+      cq_finish_shutdown_next(cq);
       gpr_mu_unlock(cq->mu);
-      GRPC_CQ_INTERNAL_UNREF(&exec_ctx, cq, "shutting_down");
+      GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down");
     }
-    grpc_exec_ctx_finish(&exec_ctx);
   }
   gpr_tls_set(&g_cached_event, (intptr_t)0);
   gpr_tls_set(&g_cached_cq, (intptr_t)0);
@@ -406,24 +389,22 @@ static bool cq_event_queue_push(grpc_cq_event_queue* q, grpc_cq_completion* c) {
 
 static grpc_cq_completion* cq_event_queue_pop(grpc_cq_event_queue* q) {
   grpc_cq_completion* c = nullptr;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   if (gpr_spinlock_trylock(&q->queue_lock)) {
-    GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_SUCCESSES(&exec_ctx);
+    GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_SUCCESSES();
 
     bool is_empty = false;
     c = (grpc_cq_completion*)gpr_mpscq_pop_and_check_end(&q->queue, &is_empty);
     gpr_spinlock_unlock(&q->queue_lock);
 
     if (c == nullptr && !is_empty) {
-      GRPC_STATS_INC_CQ_EV_QUEUE_TRANSIENT_POP_FAILURES(&exec_ctx);
+      GRPC_STATS_INC_CQ_EV_QUEUE_TRANSIENT_POP_FAILURES();
     }
   } else {
-    GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_FAILURES(&exec_ctx);
+    GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_FAILURES();
   }
 
-  grpc_exec_ctx_finish(&exec_ctx);
-
   if (c) {
     gpr_atm_no_barrier_fetch_add(&q->num_queue_items, -1);
   }
@@ -453,9 +434,8 @@ grpc_completion_queue* grpc_completion_queue_create_internal(
   const cq_poller_vtable* poller_vtable =
       &g_poller_vtable_by_poller_type[polling_type];
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_STATS_INC_CQS_CREATED(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_STATS_INC_CQS_CREATED();
 
   cq = (grpc_completion_queue*)gpr_zalloc(sizeof(grpc_completion_queue) +
                                           vtable->data_size +
@@ -537,15 +517,14 @@ void grpc_cq_internal_ref(grpc_completion_queue* cq) {
   gpr_ref(&cq->owning_refs);
 }
 
-static void on_pollset_shutdown_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* error) {
+static void on_pollset_shutdown_done(void* arg, grpc_error* error) {
   grpc_completion_queue* cq = (grpc_completion_queue*)arg;
-  GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "pollset_destroy");
+  GRPC_CQ_INTERNAL_UNREF(cq, "pollset_destroy");
 }
 
 #ifndef NDEBUG
-void grpc_cq_internal_unref(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cq,
-                            const char* reason, const char* file, int line) {
+void grpc_cq_internal_unref(grpc_completion_queue* cq, const char* reason,
+                            const char* file, int line) {
   if (grpc_trace_cq_refcount.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&cq->owning_refs.count);
     gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
@@ -553,12 +532,11 @@ void grpc_cq_internal_unref(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cq,
             reason);
   }
 #else
-void grpc_cq_internal_unref(grpc_exec_ctx* exec_ctx,
-                            grpc_completion_queue* cq) {
+void grpc_cq_internal_unref(grpc_completion_queue* cq) {
 #endif
   if (gpr_unref(&cq->owning_refs)) {
     cq->vtable->destroy(DATA_FROM_CQ(cq));
-    cq->poller_vtable->destroy(exec_ctx, POLLSET_FROM_CQ(cq));
+    cq->poller_vtable->destroy(POLLSET_FROM_CQ(cq));
 #ifndef NDEBUG
     gpr_free(cq->outstanding_tags);
 #endif
@@ -639,11 +617,9 @@ bool grpc_cq_begin_op(grpc_completion_queue* cq, void* tag) {
 /* Queue a GRPC_OP_COMPLETED operation to a completion queue (with a
  * completion
  * type of GRPC_CQ_NEXT) */
-static void cq_end_op_for_next(grpc_exec_ctx* exec_ctx,
-                               grpc_completion_queue* cq, void* tag,
+static void cq_end_op_for_next(grpc_completion_queue* cq, void* tag,
                                grpc_error* error,
-                               void (*done)(grpc_exec_ctx* exec_ctx,
-                                            void* done_arg,
+                               void (*done)(void* done_arg,
                                             grpc_cq_completion* storage),
                                void* done_arg, grpc_cq_completion* storage) {
   GPR_TIMER_BEGIN("cq_end_op_for_next", 0);
@@ -652,9 +628,9 @@ static void cq_end_op_for_next(grpc_exec_ctx* exec_ctx,
       (grpc_trace_operation_failures.enabled() && error != GRPC_ERROR_NONE)) {
     const char* errmsg = grpc_error_string(error);
     GRPC_API_TRACE(
-        "cq_end_op_for_next(exec_ctx=%p, cq=%p, tag=%p, error=%s, "
+        "cq_end_op_for_next(cq=%p, tag=%p, error=%s, "
         "done=%p, done_arg=%p, storage=%p)",
-        7, (exec_ctx, cq, tag, errmsg, done, done_arg, storage));
+        6, (cq, tag, errmsg, done, done_arg, storage));
     if (grpc_trace_operation_failures.enabled() && error != GRPC_ERROR_NONE) {
       gpr_log(GPR_ERROR, "Operation failed: tag=%p, error=%s", tag, errmsg);
     }
@@ -689,7 +665,7 @@ static void cq_end_op_for_next(grpc_exec_ctx* exec_ctx,
       if (is_first) {
         gpr_mu_lock(cq->mu);
         grpc_error* kick_error =
-            cq->poller_vtable->kick(exec_ctx, POLLSET_FROM_CQ(cq), nullptr);
+            cq->poller_vtable->kick(POLLSET_FROM_CQ(cq), nullptr);
         gpr_mu_unlock(cq->mu);
 
         if (kick_error != GRPC_ERROR_NONE) {
@@ -701,17 +677,17 @@ static void cq_end_op_for_next(grpc_exec_ctx* exec_ctx,
       if (gpr_atm_full_fetch_add(&cqd->pending_events, -1) == 1) {
         GRPC_CQ_INTERNAL_REF(cq, "shutting_down");
         gpr_mu_lock(cq->mu);
-        cq_finish_shutdown_next(exec_ctx, cq);
+        cq_finish_shutdown_next(cq);
         gpr_mu_unlock(cq->mu);
-        GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "shutting_down");
+        GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down");
       }
     } else {
       GRPC_CQ_INTERNAL_REF(cq, "shutting_down");
       gpr_atm_rel_store(&cqd->pending_events, 0);
       gpr_mu_lock(cq->mu);
-      cq_finish_shutdown_next(exec_ctx, cq);
+      cq_finish_shutdown_next(cq);
       gpr_mu_unlock(cq->mu);
-      GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "shutting_down");
+      GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down");
     }
   }
 
@@ -723,11 +699,9 @@ static void cq_end_op_for_next(grpc_exec_ctx* exec_ctx,
 /* Queue a GRPC_OP_COMPLETED operation to a completion queue (with a
  * completion
  * type of GRPC_CQ_PLUCK) */
-static void cq_end_op_for_pluck(grpc_exec_ctx* exec_ctx,
-                                grpc_completion_queue* cq, void* tag,
+static void cq_end_op_for_pluck(grpc_completion_queue* cq, void* tag,
                                 grpc_error* error,
-                                void (*done)(grpc_exec_ctx* exec_ctx,
-                                             void* done_arg,
+                                void (*done)(void* done_arg,
                                              grpc_cq_completion* storage),
                                 void* done_arg, grpc_cq_completion* storage) {
   cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
@@ -739,9 +713,9 @@ static void cq_end_op_for_pluck(grpc_exec_ctx* exec_ctx,
       (grpc_trace_operation_failures.enabled() && error != GRPC_ERROR_NONE)) {
     const char* errmsg = grpc_error_string(error);
     GRPC_API_TRACE(
-        "cq_end_op_for_pluck(exec_ctx=%p, cq=%p, tag=%p, error=%s, "
+        "cq_end_op_for_pluck(cq=%p, tag=%p, error=%s, "
         "done=%p, done_arg=%p, storage=%p)",
-        7, (exec_ctx, cq, tag, errmsg, done, done_arg, storage));
+        6, (cq, tag, errmsg, done, done_arg, storage));
     if (grpc_trace_operation_failures.enabled() && error != GRPC_ERROR_NONE) {
       gpr_log(GPR_ERROR, "Operation failed: tag=%p, error=%s", tag, errmsg);
     }
@@ -762,7 +736,7 @@ static void cq_end_op_for_pluck(grpc_exec_ctx* exec_ctx,
   cqd->completed_tail = storage;
 
   if (gpr_atm_full_fetch_add(&cqd->pending_events, -1) == 1) {
-    cq_finish_shutdown_pluck(exec_ctx, cq);
+    cq_finish_shutdown_pluck(cq);
     gpr_mu_unlock(cq->mu);
   } else {
     grpc_pollset_worker* pluck_worker = nullptr;
@@ -774,7 +748,7 @@ static void cq_end_op_for_pluck(grpc_exec_ctx* exec_ctx,
     }
 
     grpc_error* kick_error =
-        cq->poller_vtable->kick(exec_ctx, POLLSET_FROM_CQ(cq), pluck_worker);
+        cq->poller_vtable->kick(POLLSET_FROM_CQ(cq), pluck_worker);
 
     gpr_mu_unlock(cq->mu);
 
@@ -791,12 +765,10 @@ static void cq_end_op_for_pluck(grpc_exec_ctx* exec_ctx,
   GRPC_ERROR_UNREF(error);
 }
 
-void grpc_cq_end_op(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cq,
-                    void* tag, grpc_error* error,
-                    void (*done)(grpc_exec_ctx* exec_ctx, void* done_arg,
-                                 grpc_cq_completion* storage),
+void grpc_cq_end_op(grpc_completion_queue* cq, void* tag, grpc_error* error,
+                    void (*done)(void* done_arg, grpc_cq_completion* storage),
                     void* done_arg, grpc_cq_completion* storage) {
-  cq->vtable->end_op(exec_ctx, cq, tag, error, done, done_arg, storage);
+  cq->vtable->end_op(cq, tag, error, done, done_arg, storage);
 }
 
 typedef struct {
@@ -808,31 +780,40 @@ typedef struct {
   bool first_loop;
 } cq_is_finished_arg;
 
-static bool cq_is_next_finished(grpc_exec_ctx* exec_ctx, void* arg) {
-  cq_is_finished_arg* a = (cq_is_finished_arg*)arg;
-  grpc_completion_queue* cq = a->cq;
-  cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
-  GPR_ASSERT(a->stolen_completion == nullptr);
+class ExecCtxNext : public grpc_core::ExecCtx {
+ public:
+  ExecCtxNext(void* arg) : ExecCtx(0), check_ready_to_finish_arg_(arg) {}
 
-  gpr_atm current_last_seen_things_queued_ever =
-      gpr_atm_no_barrier_load(&cqd->things_queued_ever);
+  bool CheckReadyToFinish() override {
+    cq_is_finished_arg* a = (cq_is_finished_arg*)check_ready_to_finish_arg_;
+    grpc_completion_queue* cq = a->cq;
+    cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
+    GPR_ASSERT(a->stolen_completion == nullptr);
 
-  if (current_last_seen_things_queued_ever != a->last_seen_things_queued_ever) {
-    a->last_seen_things_queued_ever =
+    gpr_atm current_last_seen_things_queued_ever =
         gpr_atm_no_barrier_load(&cqd->things_queued_ever);
 
-    /* Pop a cq_completion from the queue. Returns NULL if the queue is empty
-     * might return NULL in some cases even if the queue is not empty; but
-     * that
-     * is ok and doesn't affect correctness. Might effect the tail latencies a
-     * bit) */
-    a->stolen_completion = cq_event_queue_pop(&cqd->queue);
-    if (a->stolen_completion != nullptr) {
-      return true;
+    if (current_last_seen_things_queued_ever !=
+        a->last_seen_things_queued_ever) {
+      a->last_seen_things_queued_ever =
+          gpr_atm_no_barrier_load(&cqd->things_queued_ever);
+
+      /* Pop a cq_completion from the queue. Returns NULL if the queue is empty
+       * might return NULL in some cases even if the queue is not empty; but
+       * that
+       * is ok and doesn't affect correctness. Might effect the tail latencies a
+       * bit) */
+      a->stolen_completion = cq_event_queue_pop(&cqd->queue);
+      if (a->stolen_completion != nullptr) {
+        return true;
+      }
     }
+    return !a->first_loop && a->deadline < grpc_core::ExecCtx::Get()->Now();
   }
-  return !a->first_loop && a->deadline < grpc_exec_ctx_now(exec_ctx);
-}
+
+ private:
+  void* check_ready_to_finish_arg_;
+};
 
 #ifndef NDEBUG
 static void dump_pending_tags(grpc_completion_queue* cq) {
@@ -887,8 +868,7 @@ static grpc_event cq_next(grpc_completion_queue* cq, gpr_timespec deadline,
       nullptr,
       nullptr,
       true};
-  grpc_exec_ctx exec_ctx =
-      GRPC_EXEC_CTX_INITIALIZER(0, cq_is_next_finished, &is_finished_arg);
+  ExecCtxNext exec_ctx(&is_finished_arg);
   for (;;) {
     grpc_millis iteration_deadline = deadline_millis;
 
@@ -898,7 +878,7 @@ static grpc_event cq_next(grpc_completion_queue* cq, gpr_timespec deadline,
       ret.type = GRPC_OP_COMPLETE;
       ret.success = c->next & 1u;
       ret.tag = c->tag;
-      c->done(&exec_ctx, c->done_arg, c);
+      c->done(c->done_arg, c);
       break;
     }
 
@@ -908,7 +888,7 @@ static grpc_event cq_next(grpc_completion_queue* cq, gpr_timespec deadline,
       ret.type = GRPC_OP_COMPLETE;
       ret.success = c->next & 1u;
       ret.tag = c->tag;
-      c->done(&exec_ctx, c->done_arg, c);
+      c->done(c->done_arg, c);
       break;
     } else {
       /* If c == NULL it means either the queue is empty OR in an transient
@@ -939,7 +919,7 @@ static grpc_event cq_next(grpc_completion_queue* cq, gpr_timespec deadline,
     }
 
     if (!is_finished_arg.first_loop &&
-        grpc_exec_ctx_now(&exec_ctx) >= deadline_millis) {
+        grpc_core::ExecCtx::Get()->Now() >= deadline_millis) {
       memset(&ret, 0, sizeof(ret));
       ret.type = GRPC_QUEUE_TIMEOUT;
       dump_pending_tags(cq);
@@ -949,8 +929,8 @@ static grpc_event cq_next(grpc_completion_queue* cq, gpr_timespec deadline,
     /* The main polling work happens in grpc_pollset_work */
     gpr_mu_lock(cq->mu);
     cq->num_polls++;
-    grpc_error* err = cq->poller_vtable->work(&exec_ctx, POLLSET_FROM_CQ(cq),
-                                              nullptr, iteration_deadline);
+    grpc_error* err = cq->poller_vtable->work(POLLSET_FROM_CQ(cq), nullptr,
+                                              iteration_deadline);
     gpr_mu_unlock(cq->mu);
 
     if (err != GRPC_ERROR_NONE) {
@@ -969,13 +949,13 @@ static grpc_event cq_next(grpc_completion_queue* cq, gpr_timespec deadline,
   if (cq_event_queue_num_items(&cqd->queue) > 0 &&
       gpr_atm_acq_load(&cqd->pending_events) > 0) {
     gpr_mu_lock(cq->mu);
-    cq->poller_vtable->kick(&exec_ctx, POLLSET_FROM_CQ(cq), nullptr);
+    cq->poller_vtable->kick(POLLSET_FROM_CQ(cq), nullptr);
     gpr_mu_unlock(cq->mu);
   }
 
   GRPC_SURFACE_TRACE_RETURNED_EVENT(cq, &ret);
-  GRPC_CQ_INTERNAL_UNREF(&exec_ctx, cq, "next");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CQ_INTERNAL_UNREF(cq, "next");
+
   GPR_ASSERT(is_finished_arg.stolen_completion == nullptr);
 
   GPR_TIMER_END("grpc_completion_queue_next", 0);
@@ -989,19 +969,16 @@ static grpc_event cq_next(grpc_completion_queue* cq, gpr_timespec deadline,
    - Must be called only once in completion queue's lifetime
    - grpc_completion_queue_shutdown() MUST have been called before calling
    this function */
-static void cq_finish_shutdown_next(grpc_exec_ctx* exec_ctx,
-                                    grpc_completion_queue* cq) {
+static void cq_finish_shutdown_next(grpc_completion_queue* cq) {
   cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
 
   GPR_ASSERT(cqd->shutdown_called);
   GPR_ASSERT(gpr_atm_no_barrier_load(&cqd->pending_events) == 0);
 
-  cq->poller_vtable->shutdown(exec_ctx, POLLSET_FROM_CQ(cq),
-                              &cq->pollset_shutdown_done);
+  cq->poller_vtable->shutdown(POLLSET_FROM_CQ(cq), &cq->pollset_shutdown_done);
 }
 
-static void cq_shutdown_next(grpc_exec_ctx* exec_ctx,
-                             grpc_completion_queue* cq) {
+static void cq_shutdown_next(grpc_completion_queue* cq) {
   cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
 
   /* Need an extra ref for cq here because:
@@ -1014,7 +991,7 @@ static void cq_shutdown_next(grpc_exec_ctx* exec_ctx,
   gpr_mu_lock(cq->mu);
   if (cqd->shutdown_called) {
     gpr_mu_unlock(cq->mu);
-    GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "shutting_down");
+    GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down");
     return;
   }
   cqd->shutdown_called = true;
@@ -1022,10 +999,10 @@ static void cq_shutdown_next(grpc_exec_ctx* exec_ctx,
    * cq_begin_op_for_next and and cq_end_op_for_next functions which read/write
    * on this counter without necessarily holding a lock on cq */
   if (gpr_atm_full_fetch_add(&cqd->pending_events, -1) == 1) {
-    cq_finish_shutdown_next(exec_ctx, cq);
+    cq_finish_shutdown_next(cq);
   }
   gpr_mu_unlock(cq->mu);
-  GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "shutting_down");
+  GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down");
 }
 
 grpc_event grpc_completion_queue_next(grpc_completion_queue* cq,
@@ -1058,37 +1035,46 @@ static void del_plucker(grpc_completion_queue* cq, void* tag,
   GPR_UNREACHABLE_CODE(return );
 }
 
-static bool cq_is_pluck_finished(grpc_exec_ctx* exec_ctx, void* arg) {
-  cq_is_finished_arg* a = (cq_is_finished_arg*)arg;
-  grpc_completion_queue* cq = a->cq;
-  cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
+class ExecCtxPluck : public grpc_core::ExecCtx {
+ public:
+  ExecCtxPluck(void* arg) : ExecCtx(0), check_ready_to_finish_arg_(arg) {}
 
-  GPR_ASSERT(a->stolen_completion == nullptr);
-  gpr_atm current_last_seen_things_queued_ever =
-      gpr_atm_no_barrier_load(&cqd->things_queued_ever);
-  if (current_last_seen_things_queued_ever != a->last_seen_things_queued_ever) {
-    gpr_mu_lock(cq->mu);
-    a->last_seen_things_queued_ever =
+  bool CheckReadyToFinish() override {
+    cq_is_finished_arg* a = (cq_is_finished_arg*)check_ready_to_finish_arg_;
+    grpc_completion_queue* cq = a->cq;
+    cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
+
+    GPR_ASSERT(a->stolen_completion == nullptr);
+    gpr_atm current_last_seen_things_queued_ever =
         gpr_atm_no_barrier_load(&cqd->things_queued_ever);
-    grpc_cq_completion* c;
-    grpc_cq_completion* prev = &cqd->completed_head;
-    while ((c = (grpc_cq_completion*)(prev->next & ~(uintptr_t)1)) !=
-           &cqd->completed_head) {
-      if (c->tag == a->tag) {
-        prev->next = (prev->next & (uintptr_t)1) | (c->next & ~(uintptr_t)1);
-        if (c == cqd->completed_tail) {
-          cqd->completed_tail = prev;
+    if (current_last_seen_things_queued_ever !=
+        a->last_seen_things_queued_ever) {
+      gpr_mu_lock(cq->mu);
+      a->last_seen_things_queued_ever =
+          gpr_atm_no_barrier_load(&cqd->things_queued_ever);
+      grpc_cq_completion* c;
+      grpc_cq_completion* prev = &cqd->completed_head;
+      while ((c = (grpc_cq_completion*)(prev->next & ~(uintptr_t)1)) !=
+             &cqd->completed_head) {
+        if (c->tag == a->tag) {
+          prev->next = (prev->next & (uintptr_t)1) | (c->next & ~(uintptr_t)1);
+          if (c == cqd->completed_tail) {
+            cqd->completed_tail = prev;
+          }
+          gpr_mu_unlock(cq->mu);
+          a->stolen_completion = c;
+          return true;
         }
-        gpr_mu_unlock(cq->mu);
-        a->stolen_completion = c;
-        return true;
+        prev = c;
       }
-      prev = c;
+      gpr_mu_unlock(cq->mu);
     }
-    gpr_mu_unlock(cq->mu);
+    return !a->first_loop && a->deadline < grpc_core::ExecCtx::Get()->Now();
   }
-  return !a->first_loop && a->deadline < grpc_exec_ctx_now(exec_ctx);
-}
+
+ private:
+  void* check_ready_to_finish_arg_;
+};
 
 static grpc_event cq_pluck(grpc_completion_queue* cq, void* tag,
                            gpr_timespec deadline, void* reserved) {
@@ -1125,8 +1111,7 @@ static grpc_event cq_pluck(grpc_completion_queue* cq, void* tag,
       nullptr,
       tag,
       true};
-  grpc_exec_ctx exec_ctx =
-      GRPC_EXEC_CTX_INITIALIZER(0, cq_is_pluck_finished, &is_finished_arg);
+  ExecCtxPluck exec_ctx(&is_finished_arg);
   for (;;) {
     if (is_finished_arg.stolen_completion != nullptr) {
       gpr_mu_unlock(cq->mu);
@@ -1135,7 +1120,7 @@ static grpc_event cq_pluck(grpc_completion_queue* cq, void* tag,
       ret.type = GRPC_OP_COMPLETE;
       ret.success = c->next & 1u;
       ret.tag = c->tag;
-      c->done(&exec_ctx, c->done_arg, c);
+      c->done(c->done_arg, c);
       break;
     }
     prev = &cqd->completed_head;
@@ -1150,7 +1135,7 @@ static grpc_event cq_pluck(grpc_completion_queue* cq, void* tag,
         ret.type = GRPC_OP_COMPLETE;
         ret.success = c->next & 1u;
         ret.tag = c->tag;
-        c->done(&exec_ctx, c->done_arg, c);
+        c->done(c->done_arg, c);
         goto done;
       }
       prev = c;
@@ -1174,7 +1159,7 @@ static grpc_event cq_pluck(grpc_completion_queue* cq, void* tag,
       break;
     }
     if (!is_finished_arg.first_loop &&
-        grpc_exec_ctx_now(&exec_ctx) >= deadline_millis) {
+        grpc_core::ExecCtx::Get()->Now() >= deadline_millis) {
       del_plucker(cq, tag, &worker);
       gpr_mu_unlock(cq->mu);
       memset(&ret, 0, sizeof(ret));
@@ -1183,8 +1168,8 @@ static grpc_event cq_pluck(grpc_completion_queue* cq, void* tag,
       break;
     }
     cq->num_polls++;
-    grpc_error* err = cq->poller_vtable->work(&exec_ctx, POLLSET_FROM_CQ(cq),
-                                              &worker, deadline_millis);
+    grpc_error* err =
+        cq->poller_vtable->work(POLLSET_FROM_CQ(cq), &worker, deadline_millis);
     if (err != GRPC_ERROR_NONE) {
       del_plucker(cq, tag, &worker);
       gpr_mu_unlock(cq->mu);
@@ -1202,8 +1187,8 @@ static grpc_event cq_pluck(grpc_completion_queue* cq, void* tag,
   }
 done:
   GRPC_SURFACE_TRACE_RETURNED_EVENT(cq, &ret);
-  GRPC_CQ_INTERNAL_UNREF(&exec_ctx, cq, "pluck");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CQ_INTERNAL_UNREF(cq, "pluck");
+
   GPR_ASSERT(is_finished_arg.stolen_completion == nullptr);
 
   GPR_TIMER_END("grpc_completion_queue_pluck", 0);
@@ -1216,22 +1201,19 @@ grpc_event grpc_completion_queue_pluck(grpc_completion_queue* cq, void* tag,
   return cq->vtable->pluck(cq, tag, deadline, reserved);
 }
 
-static void cq_finish_shutdown_pluck(grpc_exec_ctx* exec_ctx,
-                                     grpc_completion_queue* cq) {
+static void cq_finish_shutdown_pluck(grpc_completion_queue* cq) {
   cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
 
   GPR_ASSERT(cqd->shutdown_called);
   GPR_ASSERT(!gpr_atm_no_barrier_load(&cqd->shutdown));
   gpr_atm_no_barrier_store(&cqd->shutdown, 1);
 
-  cq->poller_vtable->shutdown(exec_ctx, POLLSET_FROM_CQ(cq),
-                              &cq->pollset_shutdown_done);
+  cq->poller_vtable->shutdown(POLLSET_FROM_CQ(cq), &cq->pollset_shutdown_done);
 }
 
 /* NOTE: This function is almost exactly identical to cq_shutdown_next() but
  * merging them is a bit tricky and probably not worth it */
-static void cq_shutdown_pluck(grpc_exec_ctx* exec_ctx,
-                              grpc_completion_queue* cq) {
+static void cq_shutdown_pluck(grpc_completion_queue* cq) {
   cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
 
   /* Need an extra ref for cq here because:
@@ -1244,25 +1226,25 @@ static void cq_shutdown_pluck(grpc_exec_ctx* exec_ctx,
   gpr_mu_lock(cq->mu);
   if (cqd->shutdown_called) {
     gpr_mu_unlock(cq->mu);
-    GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "shutting_down (pluck cq)");
+    GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down (pluck cq)");
     return;
   }
   cqd->shutdown_called = true;
   if (gpr_atm_full_fetch_add(&cqd->pending_events, -1) == 1) {
-    cq_finish_shutdown_pluck(exec_ctx, cq);
+    cq_finish_shutdown_pluck(cq);
   }
   gpr_mu_unlock(cq->mu);
-  GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "shutting_down (pluck cq)");
+  GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down (pluck cq)");
 }
 
 /* Shutdown simply drops a ref that we reserved at creation time; if we drop
    to zero here, then enter shutdown mode and wake up any waiters */
 void grpc_completion_queue_shutdown(grpc_completion_queue* cq) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GPR_TIMER_BEGIN("grpc_completion_queue_shutdown", 0);
   GRPC_API_TRACE("grpc_completion_queue_shutdown(cq=%p)", 1, (cq));
-  cq->vtable->shutdown(&exec_ctx, cq);
-  grpc_exec_ctx_finish(&exec_ctx);
+  cq->vtable->shutdown(cq);
+
   GPR_TIMER_END("grpc_completion_queue_shutdown", 0);
 }
 
@@ -1271,9 +1253,9 @@ void grpc_completion_queue_destroy(grpc_completion_queue* cq) {
   GPR_TIMER_BEGIN("grpc_completion_queue_destroy", 0);
   grpc_completion_queue_shutdown(cq);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_CQ_INTERNAL_UNREF(&exec_ctx, cq, "destroy");
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_CQ_INTERNAL_UNREF(cq, "destroy");
+
   GPR_TIMER_END("grpc_completion_queue_destroy", 0);
 }
 
diff --git a/src/core/lib/surface/completion_queue.h b/src/core/lib/surface/completion_queue.h
index 13d3e5807d..aea47afaf5 100644
--- a/src/core/lib/surface/completion_queue.h
+++ b/src/core/lib/surface/completion_queue.h
@@ -40,8 +40,7 @@ typedef struct grpc_cq_completion {
   void* tag;
   /** done callback - called when this queue element is no longer
       needed by the completion queue */
-  void (*done)(grpc_exec_ctx* exec_ctx, void* done_arg,
-               struct grpc_cq_completion* c);
+  void (*done)(void* done_arg, struct grpc_cq_completion* c);
   void* done_arg;
   /** next pointer; low bit is used to indicate success or not */
   uintptr_t next;
@@ -50,17 +49,17 @@ typedef struct grpc_cq_completion {
 #ifndef NDEBUG
 void grpc_cq_internal_ref(grpc_completion_queue* cc, const char* reason,
                           const char* file, int line);
-void grpc_cq_internal_unref(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cc,
-                            const char* reason, const char* file, int line);
+void grpc_cq_internal_unref(grpc_completion_queue* cc, const char* reason,
+                            const char* file, int line);
 #define GRPC_CQ_INTERNAL_REF(cc, reason) \
   grpc_cq_internal_ref(cc, reason, __FILE__, __LINE__)
-#define GRPC_CQ_INTERNAL_UNREF(ec, cc, reason) \
-  grpc_cq_internal_unref(ec, cc, reason, __FILE__, __LINE__)
+#define GRPC_CQ_INTERNAL_UNREF(cc, reason) \
+  grpc_cq_internal_unref(cc, reason, __FILE__, __LINE__)
 #else
 void grpc_cq_internal_ref(grpc_completion_queue* cc);
-void grpc_cq_internal_unref(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cc);
+void grpc_cq_internal_unref(grpc_completion_queue* cc);
 #define GRPC_CQ_INTERNAL_REF(cc, reason) grpc_cq_internal_ref(cc)
-#define GRPC_CQ_INTERNAL_UNREF(ec, cc, reason) grpc_cq_internal_unref(ec, cc)
+#define GRPC_CQ_INTERNAL_UNREF(cc, reason) grpc_cq_internal_unref(cc)
 #endif
 
 /* Initializes global variables used by completion queues */
@@ -74,10 +73,8 @@ bool grpc_cq_begin_op(grpc_completion_queue* cc, void* tag);
 
 /* Queue a GRPC_OP_COMPLETED operation; tag must correspond to the tag passed to
    grpc_cq_begin_op */
-void grpc_cq_end_op(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cc,
-                    void* tag, grpc_error* error,
-                    void (*done)(grpc_exec_ctx* exec_ctx, void* done_arg,
-                                 grpc_cq_completion* storage),
+void grpc_cq_end_op(grpc_completion_queue* cc, void* tag, grpc_error* error,
+                    void (*done)(void* done_arg, grpc_cq_completion* storage),
                     void* done_arg, grpc_cq_completion* storage);
 
 grpc_pollset* grpc_cq_pollset(grpc_completion_queue* cc);
diff --git a/src/core/lib/surface/init.cc b/src/core/lib/surface/init.cc
index 8ee1383fb8..0f40965f16 100644
--- a/src/core/lib/surface/init.cc
+++ b/src/core/lib/surface/init.cc
@@ -73,14 +73,12 @@ static void do_basic_init(void) {
   grpc_fork_handlers_auto_register();
 }
 
-static bool append_filter(grpc_exec_ctx* exec_ctx,
-                          grpc_channel_stack_builder* builder, void* arg) {
+static bool append_filter(grpc_channel_stack_builder* builder, void* arg) {
   return grpc_channel_stack_builder_append_filter(
       builder, (const grpc_channel_filter*)arg, nullptr, nullptr);
 }
 
-static bool prepend_filter(grpc_exec_ctx* exec_ctx,
-                           grpc_channel_stack_builder* builder, void* arg) {
+static bool prepend_filter(grpc_channel_stack_builder* builder, void* arg) {
   return grpc_channel_stack_builder_prepend_filter(
       builder, (const grpc_channel_filter*)arg, nullptr, nullptr);
 }
@@ -123,7 +121,6 @@ void grpc_init(void) {
   int i;
   gpr_once_init(&g_basic_init, do_basic_init);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   gpr_mu_lock(&g_init_mu);
   if (++g_initializations == 1) {
     gpr_time_init();
@@ -133,7 +130,8 @@ void grpc_init(void) {
     grpc_mdctx_global_init();
     grpc_channel_init_init();
     grpc_security_pre_init();
-    grpc_iomgr_init(&exec_ctx);
+    grpc_core::ExecCtx::GlobalInit();
+    grpc_iomgr_init();
     gpr_timers_global_init();
     grpc_handshaker_factory_registry_init();
     grpc_security_init();
@@ -149,37 +147,41 @@ void grpc_init(void) {
     grpc_tracer_init("GRPC_TRACE");
     /* no more changes to channel init pipelines */
     grpc_channel_init_finalize();
-    grpc_iomgr_start(&exec_ctx);
+    grpc_iomgr_start();
   }
   gpr_mu_unlock(&g_init_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   GRPC_API_TRACE("grpc_init(void)", 0, ());
 }
 
 void grpc_shutdown(void) {
   int i;
   GRPC_API_TRACE("grpc_shutdown(void)", 0, ());
-  grpc_exec_ctx exec_ctx =
-      GRPC_EXEC_CTX_INITIALIZER(0, grpc_never_ready_to_finish, nullptr);
   gpr_mu_lock(&g_init_mu);
   if (--g_initializations == 0) {
-    grpc_executor_shutdown(&exec_ctx);
-    grpc_timer_manager_set_threading(false);  // shutdown timer_manager thread
-    for (i = g_number_of_plugins; i >= 0; i--) {
-      if (g_all_of_the_plugins[i].destroy != nullptr) {
-        g_all_of_the_plugins[i].destroy();
+    {
+      grpc_core::ExecCtx exec_ctx(0);
+      {
+        grpc_executor_shutdown();
+        grpc_timer_manager_set_threading(
+            false);  // shutdown timer_manager thread
+        for (i = g_number_of_plugins; i >= 0; i--) {
+          if (g_all_of_the_plugins[i].destroy != nullptr) {
+            g_all_of_the_plugins[i].destroy();
+          }
+        }
       }
+      grpc_iomgr_shutdown();
+      gpr_timers_global_destroy();
+      grpc_tracer_shutdown();
+      grpc_mdctx_global_shutdown();
+      grpc_handshaker_factory_registry_shutdown();
+      grpc_slice_intern_shutdown();
+      grpc_stats_shutdown();
     }
-    grpc_iomgr_shutdown(&exec_ctx);
-    gpr_timers_global_destroy();
-    grpc_tracer_shutdown();
-    grpc_mdctx_global_shutdown(&exec_ctx);
-    grpc_handshaker_factory_registry_shutdown(&exec_ctx);
-    grpc_slice_intern_shutdown();
-    grpc_stats_shutdown();
+    grpc_core::ExecCtx::GlobalShutdown();
   }
   gpr_mu_unlock(&g_init_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int grpc_is_initialized(void) {
diff --git a/src/core/lib/surface/init_secure.cc b/src/core/lib/surface/init_secure.cc
index 3eee570fc2..75ed9faef0 100644
--- a/src/core/lib/surface/init_secure.cc
+++ b/src/core/lib/surface/init_secure.cc
@@ -37,7 +37,7 @@
 void grpc_security_pre_init(void) {}
 
 static bool maybe_prepend_client_auth_filter(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, void* arg) {
+    grpc_channel_stack_builder* builder, void* arg) {
   const grpc_channel_args* args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
   if (args) {
@@ -52,7 +52,7 @@ static bool maybe_prepend_client_auth_filter(
 }
 
 static bool maybe_prepend_server_auth_filter(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, void* arg) {
+    grpc_channel_stack_builder* builder, void* arg) {
   const grpc_channel_args* args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
   if (args) {
diff --git a/src/core/lib/surface/lame_client.cc b/src/core/lib/surface/lame_client.cc
index c32c9af50e..08611ff730 100644
--- a/src/core/lib/surface/lame_client.cc
+++ b/src/core/lib/surface/lame_client.cc
@@ -49,8 +49,7 @@ struct ChannelData {
   const char* error_message;
 };
 
-static void fill_metadata(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-                          grpc_metadata_batch* mdb) {
+static void fill_metadata(grpc_call_element* elem, grpc_metadata_batch* mdb) {
   CallData* calld = reinterpret_cast<CallData*>(elem->call_data);
   bool expected = false;
   if (!calld->filled_metadata.compare_exchange_strong(
@@ -62,9 +61,9 @@ static void fill_metadata(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
   char tmp[GPR_LTOA_MIN_BUFSIZE];
   gpr_ltoa(chand->error_code, tmp);
   calld->status.md = grpc_mdelem_from_slices(
-      exec_ctx, GRPC_MDSTR_GRPC_STATUS, grpc_slice_from_copied_string(tmp));
+      GRPC_MDSTR_GRPC_STATUS, grpc_slice_from_copied_string(tmp));
   calld->details.md = grpc_mdelem_from_slices(
-      exec_ctx, GRPC_MDSTR_GRPC_MESSAGE,
+      GRPC_MDSTR_GRPC_MESSAGE,
       grpc_slice_from_copied_string(chand->error_message));
   calld->status.prev = calld->details.next = nullptr;
   calld->status.next = &calld->details;
@@ -76,69 +75,67 @@ static void fill_metadata(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
 }
 
 static void lame_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   CallData* calld = reinterpret_cast<CallData*>(elem->call_data);
   if (op->recv_initial_metadata) {
-    fill_metadata(exec_ctx, elem,
+    fill_metadata(elem,
                   op->payload->recv_initial_metadata.recv_initial_metadata);
   } else if (op->recv_trailing_metadata) {
-    fill_metadata(exec_ctx, elem,
+    fill_metadata(elem,
                   op->payload->recv_trailing_metadata.recv_trailing_metadata);
   }
   grpc_transport_stream_op_batch_finish_with_failure(
-      exec_ctx, op, GRPC_ERROR_CREATE_FROM_STATIC_STRING("lame client channel"),
+      op, GRPC_ERROR_CREATE_FROM_STATIC_STRING("lame client channel"),
       calld->call_combiner);
 }
 
-static void lame_get_channel_info(grpc_exec_ctx* exec_ctx,
-                                  grpc_channel_element* elem,
+static void lame_get_channel_info(grpc_channel_element* elem,
                                   const grpc_channel_info* channel_info) {}
 
-static void lame_start_transport_op(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_element* elem,
+static void lame_start_transport_op(grpc_channel_element* elem,
                                     grpc_transport_op* op) {
   if (op->on_connectivity_state_change) {
     GPR_ASSERT(*op->connectivity_state != GRPC_CHANNEL_SHUTDOWN);
     *op->connectivity_state = GRPC_CHANNEL_SHUTDOWN;
-    GRPC_CLOSURE_SCHED(exec_ctx, op->on_connectivity_state_change,
-                       GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(op->on_connectivity_state_change, GRPC_ERROR_NONE);
   }
-  if (op->send_ping != nullptr) {
+  if (op->send_ping.on_initiate != nullptr) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx, op->send_ping,
+        op->send_ping.on_initiate,
+        GRPC_ERROR_CREATE_FROM_STATIC_STRING("lame client channel"));
+  }
+  if (op->send_ping.on_ack != nullptr) {
+    GRPC_CLOSURE_SCHED(
+        op->send_ping.on_ack,
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("lame client channel"));
   }
   GRPC_ERROR_UNREF(op->disconnect_with_error);
   if (op->on_consumed != nullptr) {
-    GRPC_CLOSURE_SCHED(exec_ctx, op->on_consumed, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(op->on_consumed, GRPC_ERROR_NONE);
   }
 }
 
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   CallData* calld = reinterpret_cast<CallData*>(elem->call_data);
   calld->call_combiner = args->call_combiner;
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* then_schedule_closure) {
-  GRPC_CLOSURE_SCHED(exec_ctx, then_schedule_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(then_schedule_closure, GRPC_ERROR_NONE);
 }
 
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(args->is_first);
   GPR_ASSERT(args->is_last);
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 }  // namespace
 
@@ -163,10 +160,10 @@ const grpc_channel_filter grpc_lame_filter = {
 grpc_channel* grpc_lame_client_channel_create(const char* target,
                                               grpc_status_code error_code,
                                               const char* error_message) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_element* elem;
-  grpc_channel* channel = grpc_channel_create(
-      &exec_ctx, target, nullptr, GRPC_CLIENT_LAME_CHANNEL, nullptr);
+  grpc_channel* channel =
+      grpc_channel_create(target, nullptr, GRPC_CLIENT_LAME_CHANNEL, nullptr);
   elem = grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0);
   GRPC_API_TRACE(
       "grpc_lame_client_channel_create(target=%s, error_code=%d, "
@@ -176,6 +173,6 @@ grpc_channel* grpc_lame_client_channel_create(const char* target,
   auto chand = reinterpret_cast<grpc_core::ChannelData*>(elem->channel_data);
   chand->error_code = error_code;
   chand->error_message = error_message;
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return channel;
 }
diff --git a/src/core/lib/surface/server.cc b/src/core/lib/surface/server.cc
index 0f8a057f31..f1d428f0a1 100644
--- a/src/core/lib/surface/server.cc
+++ b/src/core/lib/surface/server.cc
@@ -46,10 +46,9 @@
 
 typedef struct listener {
   void* arg;
-  void (*start)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-                grpc_pollset** pollsets, size_t pollset_count);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-                  grpc_closure* closure);
+  void (*start)(grpc_server* server, void* arg, grpc_pollset** pollsets,
+                size_t pollset_count);
+  void (*destroy)(grpc_server* server, void* arg, grpc_closure* closure);
   struct listener* next;
   grpc_closure destroy_done;
 } listener;
@@ -224,13 +223,12 @@ struct grpc_server {
 #define SERVER_FROM_CALL_ELEM(elem) \
   (((channel_data*)(elem)->channel_data)->server)
 
-static void publish_new_rpc(grpc_exec_ctx* exec_ctx, void* calld,
-                            grpc_error* error);
-static void fail_call(grpc_exec_ctx* exec_ctx, grpc_server* server,
-                      size_t cq_idx, requested_call* rc, grpc_error* error);
+static void publish_new_rpc(void* calld, grpc_error* error);
+static void fail_call(grpc_server* server, size_t cq_idx, requested_call* rc,
+                      grpc_error* error);
 /* Before calling maybe_finish_shutdown, we must hold mu_global and not
    hold mu_call */
-static void maybe_finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_server* server);
+static void maybe_finish_shutdown(grpc_server* server);
 
 /*
  * channel broadcaster
@@ -258,15 +256,14 @@ struct shutdown_cleanup_args {
   grpc_slice slice;
 };
 
-static void shutdown_cleanup(grpc_exec_ctx* exec_ctx, void* arg,
-                             grpc_error* error) {
+static void shutdown_cleanup(void* arg, grpc_error* error) {
   struct shutdown_cleanup_args* a = (struct shutdown_cleanup_args*)arg;
-  grpc_slice_unref_internal(exec_ctx, a->slice);
+  grpc_slice_unref_internal(a->slice);
   gpr_free(a);
 }
 
-static void send_shutdown(grpc_exec_ctx* exec_ctx, grpc_channel* channel,
-                          bool send_goaway, grpc_error* send_disconnect) {
+static void send_shutdown(grpc_channel* channel, bool send_goaway,
+                          grpc_error* send_disconnect) {
   struct shutdown_cleanup_args* sc =
       (struct shutdown_cleanup_args*)gpr_malloc(sizeof(*sc));
   GRPC_CLOSURE_INIT(&sc->closure, shutdown_cleanup, sc,
@@ -284,19 +281,18 @@ static void send_shutdown(grpc_exec_ctx* exec_ctx, grpc_channel* channel,
   op->disconnect_with_error = send_disconnect;
 
   elem = grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0);
-  elem->filter->start_transport_op(exec_ctx, elem, op);
+  elem->filter->start_transport_op(elem, op);
 }
 
-static void channel_broadcaster_shutdown(grpc_exec_ctx* exec_ctx,
-                                         channel_broadcaster* cb,
+static void channel_broadcaster_shutdown(channel_broadcaster* cb,
                                          bool send_goaway,
                                          grpc_error* force_disconnect) {
   size_t i;
 
   for (i = 0; i < cb->num_channels; i++) {
-    send_shutdown(exec_ctx, cb->channels[i], send_goaway,
+    send_shutdown(cb->channels[i], send_goaway,
                   GRPC_ERROR_REF(force_disconnect));
-    GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, cb->channels[i], "broadcast");
+    GRPC_CHANNEL_INTERNAL_UNREF(cb->channels[i], "broadcast");
   }
   gpr_free(cb->channels);
   GRPC_ERROR_UNREF(force_disconnect);
@@ -324,13 +320,11 @@ static void request_matcher_destroy(request_matcher* rm) {
   gpr_free(rm->requests_per_cq);
 }
 
-static void kill_zombie(grpc_exec_ctx* exec_ctx, void* elem,
-                        grpc_error* error) {
+static void kill_zombie(void* elem, grpc_error* error) {
   grpc_call_unref(grpc_call_from_top_element((grpc_call_element*)elem));
 }
 
-static void request_matcher_zombify_all_pending_calls(grpc_exec_ctx* exec_ctx,
-                                                      request_matcher* rm) {
+static void request_matcher_zombify_all_pending_calls(request_matcher* rm) {
   while (rm->pending_head) {
     call_data* calld = rm->pending_head;
     rm->pending_head = calld->pending_next;
@@ -339,19 +333,18 @@ static void request_matcher_zombify_all_pending_calls(grpc_exec_ctx* exec_ctx,
         &calld->kill_zombie_closure, kill_zombie,
         grpc_call_stack_element(grpc_call_get_call_stack(calld->call), 0),
         grpc_schedule_on_exec_ctx);
-    GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&calld->kill_zombie_closure, GRPC_ERROR_NONE);
   }
 }
 
-static void request_matcher_kill_requests(grpc_exec_ctx* exec_ctx,
-                                          grpc_server* server,
+static void request_matcher_kill_requests(grpc_server* server,
                                           request_matcher* rm,
                                           grpc_error* error) {
   requested_call* rc;
   for (size_t i = 0; i < server->cq_count; i++) {
     while ((rc = (requested_call*)gpr_locked_mpscq_pop(
                 &rm->requests_per_cq[i])) != nullptr) {
-      fail_call(exec_ctx, server, i, rc, GRPC_ERROR_REF(error));
+      fail_call(server, i, rc, GRPC_ERROR_REF(error));
     }
   }
   GRPC_ERROR_UNREF(error);
@@ -365,10 +358,10 @@ static void server_ref(grpc_server* server) {
   gpr_ref(&server->internal_refcount);
 }
 
-static void server_delete(grpc_exec_ctx* exec_ctx, grpc_server* server) {
+static void server_delete(grpc_server* server) {
   registered_method* rm;
   size_t i;
-  grpc_channel_args_destroy(exec_ctx, server->channel_args);
+  grpc_channel_args_destroy(server->channel_args);
   gpr_mu_destroy(&server->mu_global);
   gpr_mu_destroy(&server->mu_call);
   gpr_cv_destroy(&server->starting_cv);
@@ -385,7 +378,7 @@ static void server_delete(grpc_exec_ctx* exec_ctx, grpc_server* server) {
     request_matcher_destroy(&server->unregistered_request_matcher);
   }
   for (i = 0; i < server->cq_count; i++) {
-    GRPC_CQ_INTERNAL_UNREF(exec_ctx, server->cqs[i], "server");
+    GRPC_CQ_INTERNAL_UNREF(server->cqs[i], "server");
   }
   gpr_free(server->cqs);
   gpr_free(server->pollsets);
@@ -393,9 +386,9 @@ static void server_delete(grpc_exec_ctx* exec_ctx, grpc_server* server) {
   gpr_free(server);
 }
 
-static void server_unref(grpc_exec_ctx* exec_ctx, grpc_server* server) {
+static void server_unref(grpc_server* server) {
   if (gpr_unref(&server->internal_refcount)) {
-    server_delete(exec_ctx, server);
+    server_delete(server);
   }
 }
 
@@ -409,21 +402,19 @@ static void orphan_channel(channel_data* chand) {
   chand->next = chand->prev = chand;
 }
 
-static void finish_destroy_channel(grpc_exec_ctx* exec_ctx, void* cd,
-                                   grpc_error* error) {
+static void finish_destroy_channel(void* cd, grpc_error* error) {
   channel_data* chand = (channel_data*)cd;
   grpc_server* server = chand->server;
-  GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, chand->channel, "server");
-  server_unref(exec_ctx, server);
+  GRPC_CHANNEL_INTERNAL_UNREF(chand->channel, "server");
+  server_unref(server);
 }
 
-static void destroy_channel(grpc_exec_ctx* exec_ctx, channel_data* chand,
-                            grpc_error* error) {
+static void destroy_channel(channel_data* chand, grpc_error* error) {
   if (is_channel_orphaned(chand)) return;
   GPR_ASSERT(chand->server != nullptr);
   orphan_channel(chand);
   server_ref(chand->server);
-  maybe_finish_shutdown(exec_ctx, chand->server);
+  maybe_finish_shutdown(chand->server);
   GRPC_CLOSURE_INIT(&chand->finish_destroy_channel_closure,
                     finish_destroy_channel, chand, grpc_schedule_on_exec_ctx);
 
@@ -436,20 +427,18 @@ static void destroy_channel(grpc_exec_ctx* exec_ctx, channel_data* chand,
   grpc_transport_op* op =
       grpc_make_transport_op(&chand->finish_destroy_channel_closure);
   op->set_accept_stream = true;
-  grpc_channel_next_op(exec_ctx,
-                       grpc_channel_stack_element(
+  grpc_channel_next_op(grpc_channel_stack_element(
                            grpc_channel_get_channel_stack(chand->channel), 0),
                        op);
 }
 
-static void done_request_event(grpc_exec_ctx* exec_ctx, void* req,
-                               grpc_cq_completion* c) {
+static void done_request_event(void* req, grpc_cq_completion* c) {
   gpr_free(req);
 }
 
-static void publish_call(grpc_exec_ctx* exec_ctx, grpc_server* server,
-                         call_data* calld, size_t cq_idx, requested_call* rc) {
-  grpc_call_set_completion_queue(exec_ctx, calld->call, rc->cq_bound_to_call);
+static void publish_call(grpc_server* server, call_data* calld, size_t cq_idx,
+                         requested_call* rc) {
+  grpc_call_set_completion_queue(calld->call, rc->cq_bound_to_call);
   grpc_call* call = calld->call;
   *rc->call = call;
   calld->cq_new = server->cqs[cq_idx];
@@ -476,12 +465,11 @@ static void publish_call(grpc_exec_ctx* exec_ctx, grpc_server* server,
       GPR_UNREACHABLE_CODE(return );
   }
 
-  grpc_cq_end_op(exec_ctx, calld->cq_new, rc->tag, GRPC_ERROR_NONE,
-                 done_request_event, rc, &rc->completion);
+  grpc_cq_end_op(calld->cq_new, rc->tag, GRPC_ERROR_NONE, done_request_event,
+                 rc, &rc->completion);
 }
 
-static void publish_new_rpc(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void publish_new_rpc(void* arg, grpc_error* error) {
   grpc_call_element* call_elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)call_elem->call_data;
   channel_data* chand = (channel_data*)call_elem->channel_data;
@@ -494,8 +482,7 @@ static void publish_new_rpc(grpc_exec_ctx* exec_ctx, void* arg,
         &calld->kill_zombie_closure, kill_zombie,
         grpc_call_stack_element(grpc_call_get_call_stack(calld->call), 0),
         grpc_schedule_on_exec_ctx);
-    GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure,
-                       GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(&calld->kill_zombie_closure, GRPC_ERROR_REF(error));
     return;
   }
 
@@ -506,15 +493,15 @@ static void publish_new_rpc(grpc_exec_ctx* exec_ctx, void* arg,
     if (rc == nullptr) {
       continue;
     } else {
-      GRPC_STATS_INC_SERVER_CQS_CHECKED(exec_ctx, i);
+      GRPC_STATS_INC_SERVER_CQS_CHECKED(i);
       gpr_atm_no_barrier_store(&calld->state, ACTIVATED);
-      publish_call(exec_ctx, server, calld, cq_idx, rc);
+      publish_call(server, calld, cq_idx, rc);
       return; /* early out */
     }
   }
 
   /* no cq to take the request found: queue it on the slow list */
-  GRPC_STATS_INC_SERVER_SLOWPATH_REQUESTS_QUEUED(exec_ctx);
+  GRPC_STATS_INC_SERVER_SLOWPATH_REQUESTS_QUEUED();
   gpr_mu_lock(&server->mu_call);
 
   // We need to ensure that all the queues are empty.  We do this under
@@ -529,9 +516,9 @@ static void publish_new_rpc(grpc_exec_ctx* exec_ctx, void* arg,
       continue;
     } else {
       gpr_mu_unlock(&server->mu_call);
-      GRPC_STATS_INC_SERVER_CQS_CHECKED(exec_ctx, i + server->cq_count);
+      GRPC_STATS_INC_SERVER_CQS_CHECKED(i + server->cq_count);
       gpr_atm_no_barrier_store(&calld->state, ACTIVATED);
-      publish_call(exec_ctx, server, calld, cq_idx, rc);
+      publish_call(server, calld, cq_idx, rc);
       return; /* early out */
     }
   }
@@ -548,8 +535,7 @@ static void publish_new_rpc(grpc_exec_ctx* exec_ctx, void* arg,
 }
 
 static void finish_start_new_rpc(
-    grpc_exec_ctx* exec_ctx, grpc_server* server, grpc_call_element* elem,
-    request_matcher* rm,
+    grpc_server* server, grpc_call_element* elem, request_matcher* rm,
     grpc_server_register_method_payload_handling payload_handling) {
   call_data* calld = (call_data*)elem->call_data;
 
@@ -557,7 +543,7 @@ static void finish_start_new_rpc(
     gpr_atm_no_barrier_store(&calld->state, ZOMBIED);
     GRPC_CLOSURE_INIT(&calld->kill_zombie_closure, kill_zombie, elem,
                       grpc_schedule_on_exec_ctx);
-    GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&calld->kill_zombie_closure, GRPC_ERROR_NONE);
     return;
   }
 
@@ -565,7 +551,7 @@ static void finish_start_new_rpc(
 
   switch (payload_handling) {
     case GRPC_SRM_PAYLOAD_NONE:
-      publish_new_rpc(exec_ctx, elem, GRPC_ERROR_NONE);
+      publish_new_rpc(elem, GRPC_ERROR_NONE);
       break;
     case GRPC_SRM_PAYLOAD_READ_INITIAL_BYTE_BUFFER: {
       grpc_op op;
@@ -574,14 +560,13 @@ static void finish_start_new_rpc(
       op.data.recv_message.recv_message = &calld->payload;
       GRPC_CLOSURE_INIT(&calld->publish, publish_new_rpc, elem,
                         grpc_schedule_on_exec_ctx);
-      grpc_call_start_batch_and_execute(exec_ctx, calld->call, &op, 1,
-                                        &calld->publish);
+      grpc_call_start_batch_and_execute(calld->call, &op, 1, &calld->publish);
       break;
     }
   }
 }
 
-static void start_new_rpc(grpc_exec_ctx* exec_ctx, grpc_call_element* elem) {
+static void start_new_rpc(grpc_call_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
   grpc_server* server = chand->server;
@@ -606,8 +591,7 @@ static void start_new_rpc(grpc_exec_ctx* exec_ctx, grpc_call_element* elem) {
                 GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST)) {
         continue;
       }
-      finish_start_new_rpc(exec_ctx, server, elem,
-                           &rm->server_registered_method->matcher,
+      finish_start_new_rpc(server, elem, &rm->server_registered_method->matcher,
                            rm->server_registered_method->payload_handling);
       return;
     }
@@ -624,14 +608,12 @@ static void start_new_rpc(grpc_exec_ctx* exec_ctx, grpc_call_element* elem) {
                 GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST)) {
         continue;
       }
-      finish_start_new_rpc(exec_ctx, server, elem,
-                           &rm->server_registered_method->matcher,
+      finish_start_new_rpc(server, elem, &rm->server_registered_method->matcher,
                            rm->server_registered_method->payload_handling);
       return;
     }
   }
-  finish_start_new_rpc(exec_ctx, server, elem,
-                       &server->unregistered_request_matcher,
+  finish_start_new_rpc(server, elem, &server->unregistered_request_matcher,
                        GRPC_SRM_PAYLOAD_NONE);
 }
 
@@ -644,9 +626,8 @@ static int num_listeners(grpc_server* server) {
   return n;
 }
 
-static void done_shutdown_event(grpc_exec_ctx* exec_ctx, void* server,
-                                grpc_cq_completion* completion) {
-  server_unref(exec_ctx, (grpc_server*)server);
+static void done_shutdown_event(void* server, grpc_cq_completion* completion) {
+  server_unref((grpc_server*)server);
 }
 
 static int num_channels(grpc_server* server) {
@@ -659,34 +640,30 @@ static int num_channels(grpc_server* server) {
   return n;
 }
 
-static void kill_pending_work_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_server* server, grpc_error* error) {
+static void kill_pending_work_locked(grpc_server* server, grpc_error* error) {
   if (server->started) {
-    request_matcher_kill_requests(exec_ctx, server,
-                                  &server->unregistered_request_matcher,
+    request_matcher_kill_requests(server, &server->unregistered_request_matcher,
                                   GRPC_ERROR_REF(error));
     request_matcher_zombify_all_pending_calls(
-        exec_ctx, &server->unregistered_request_matcher);
+        &server->unregistered_request_matcher);
     for (registered_method* rm = server->registered_methods; rm;
          rm = rm->next) {
-      request_matcher_kill_requests(exec_ctx, server, &rm->matcher,
+      request_matcher_kill_requests(server, &rm->matcher,
                                     GRPC_ERROR_REF(error));
-      request_matcher_zombify_all_pending_calls(exec_ctx, &rm->matcher);
+      request_matcher_zombify_all_pending_calls(&rm->matcher);
     }
   }
   GRPC_ERROR_UNREF(error);
 }
 
-static void maybe_finish_shutdown(grpc_exec_ctx* exec_ctx,
-                                  grpc_server* server) {
+static void maybe_finish_shutdown(grpc_server* server) {
   size_t i;
   if (!gpr_atm_acq_load(&server->shutdown_flag) || server->shutdown_published) {
     return;
   }
 
   kill_pending_work_locked(
-      exec_ctx, server,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown"));
+      server, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown"));
 
   if (server->root_channel_data.next != &server->root_channel_data ||
       server->listeners_destroyed < num_listeners(server)) {
@@ -706,15 +683,13 @@ static void maybe_finish_shutdown(grpc_exec_ctx* exec_ctx,
   server->shutdown_published = 1;
   for (i = 0; i < server->num_shutdown_tags; i++) {
     server_ref(server);
-    grpc_cq_end_op(exec_ctx, server->shutdown_tags[i].cq,
-                   server->shutdown_tags[i].tag, GRPC_ERROR_NONE,
-                   done_shutdown_event, server,
+    grpc_cq_end_op(server->shutdown_tags[i].cq, server->shutdown_tags[i].tag,
+                   GRPC_ERROR_NONE, done_shutdown_event, server,
                    &server->shutdown_tags[i].completion);
   }
 }
 
-static void server_on_recv_initial_metadata(grpc_exec_ctx* exec_ctx, void* ptr,
-                                            grpc_error* error) {
+static void server_on_recv_initial_metadata(void* ptr, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)ptr;
   call_data* calld = (call_data*)elem->call_data;
   grpc_millis op_deadline;
@@ -728,10 +703,10 @@ static void server_on_recv_initial_metadata(grpc_exec_ctx* exec_ctx, void* ptr,
         GRPC_MDVALUE(calld->recv_initial_metadata->idx.named.authority->md));
     calld->path_set = true;
     calld->host_set = true;
-    grpc_metadata_batch_remove(exec_ctx, calld->recv_initial_metadata,
+    grpc_metadata_batch_remove(calld->recv_initial_metadata,
                                calld->recv_initial_metadata->idx.named.path);
     grpc_metadata_batch_remove(
-        exec_ctx, calld->recv_initial_metadata,
+        calld->recv_initial_metadata,
         calld->recv_initial_metadata->idx.named.authority);
   } else {
     GRPC_ERROR_REF(error);
@@ -749,7 +724,7 @@ static void server_on_recv_initial_metadata(grpc_exec_ctx* exec_ctx, void* ptr,
     GRPC_ERROR_UNREF(src_error);
   }
 
-  GRPC_CLOSURE_RUN(exec_ctx, calld->on_done_recv_initial_metadata, error);
+  GRPC_CLOSURE_RUN(calld->on_done_recv_initial_metadata, error);
 }
 
 static void server_mutate_op(grpc_call_element* elem,
@@ -770,24 +745,21 @@ static void server_mutate_op(grpc_call_element* elem,
 }
 
 static void server_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   server_mutate_op(elem, op);
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 }
 
-static void got_initial_metadata(grpc_exec_ctx* exec_ctx, void* ptr,
-                                 grpc_error* error) {
+static void got_initial_metadata(void* ptr, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)ptr;
   call_data* calld = (call_data*)elem->call_data;
   if (error == GRPC_ERROR_NONE) {
-    start_new_rpc(exec_ctx, elem);
+    start_new_rpc(elem);
   } else {
     if (gpr_atm_full_cas(&calld->state, NOT_STARTED, ZOMBIED)) {
       GRPC_CLOSURE_INIT(&calld->kill_zombie_closure, kill_zombie, elem,
                         grpc_schedule_on_exec_ctx);
-      GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure,
-                         GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(&calld->kill_zombie_closure, GRPC_ERROR_NONE);
     } else if (gpr_atm_full_cas(&calld->state, PENDING, ZOMBIED)) {
       /* zombied call will be destroyed when it's removed from the pending
          queue... later */
@@ -795,8 +767,7 @@ static void got_initial_metadata(grpc_exec_ctx* exec_ctx, void* ptr,
   }
 }
 
-static void accept_stream(grpc_exec_ctx* exec_ctx, void* cd,
-                          grpc_transport* transport,
+static void accept_stream(void* cd, grpc_transport* transport,
                           const void* transport_server_data) {
   channel_data* chand = (channel_data*)cd;
   /* create a call */
@@ -806,11 +777,11 @@ static void accept_stream(grpc_exec_ctx* exec_ctx, void* cd,
   args.server_transport_data = transport_server_data;
   args.send_deadline = GRPC_MILLIS_INF_FUTURE;
   grpc_call* call;
-  grpc_error* error = grpc_call_create(exec_ctx, &args, &call);
+  grpc_error* error = grpc_call_create(&args, &call);
   grpc_call_element* elem =
       grpc_call_stack_element(grpc_call_get_call_stack(call), 0);
   if (error != GRPC_ERROR_NONE) {
-    got_initial_metadata(exec_ctx, elem, error);
+    got_initial_metadata(elem, error);
     GRPC_ERROR_UNREF(error);
     return;
   }
@@ -822,32 +793,28 @@ static void accept_stream(grpc_exec_ctx* exec_ctx, void* cd,
       &calld->initial_metadata;
   GRPC_CLOSURE_INIT(&calld->got_initial_metadata, got_initial_metadata, elem,
                     grpc_schedule_on_exec_ctx);
-  grpc_call_start_batch_and_execute(exec_ctx, call, &op, 1,
-                                    &calld->got_initial_metadata);
+  grpc_call_start_batch_and_execute(call, &op, 1, &calld->got_initial_metadata);
 }
 
-static void channel_connectivity_changed(grpc_exec_ctx* exec_ctx, void* cd,
-                                         grpc_error* error) {
+static void channel_connectivity_changed(void* cd, grpc_error* error) {
   channel_data* chand = (channel_data*)cd;
   grpc_server* server = chand->server;
   if (chand->connectivity_state != GRPC_CHANNEL_SHUTDOWN) {
     grpc_transport_op* op = grpc_make_transport_op(nullptr);
     op->on_connectivity_state_change = &chand->channel_connectivity_changed;
     op->connectivity_state = &chand->connectivity_state;
-    grpc_channel_next_op(exec_ctx,
-                         grpc_channel_stack_element(
+    grpc_channel_next_op(grpc_channel_stack_element(
                              grpc_channel_get_channel_stack(chand->channel), 0),
                          op);
   } else {
     gpr_mu_lock(&server->mu_global);
-    destroy_channel(exec_ctx, chand, GRPC_ERROR_REF(error));
+    destroy_channel(chand, GRPC_ERROR_REF(error));
     gpr_mu_unlock(&server->mu_global);
-    GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, chand->channel, "connectivity");
+    GRPC_CHANNEL_INTERNAL_UNREF(chand->channel, "connectivity");
   }
 }
 
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -863,7 +830,7 @@ static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -872,19 +839,18 @@ static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
   GPR_ASSERT(calld->state != PENDING);
 
   if (calld->host_set) {
-    grpc_slice_unref_internal(exec_ctx, calld->host);
+    grpc_slice_unref_internal(calld->host);
   }
   if (calld->path_set) {
-    grpc_slice_unref_internal(exec_ctx, calld->path);
+    grpc_slice_unref_internal(calld->path);
   }
   grpc_metadata_array_destroy(&calld->initial_metadata);
   grpc_byte_buffer_destroy(calld->payload);
 
-  server_unref(exec_ctx, chand->server);
+  server_unref(chand->server);
 }
 
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   channel_data* chand = (channel_data*)elem->channel_data;
   GPR_ASSERT(args->is_first);
@@ -900,15 +866,14 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   size_t i;
   channel_data* chand = (channel_data*)elem->channel_data;
   if (chand->registered_methods) {
     for (i = 0; i < chand->registered_method_slots; i++) {
-      grpc_slice_unref_internal(exec_ctx, chand->registered_methods[i].method);
+      grpc_slice_unref_internal(chand->registered_methods[i].method);
       if (chand->registered_methods[i].has_host) {
-        grpc_slice_unref_internal(exec_ctx, chand->registered_methods[i].host);
+        grpc_slice_unref_internal(chand->registered_methods[i].host);
       }
     }
     gpr_free(chand->registered_methods);
@@ -918,9 +883,9 @@ static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
     chand->next->prev = chand->prev;
     chand->prev->next = chand->next;
     chand->next = chand->prev = chand;
-    maybe_finish_shutdown(exec_ctx, chand->server);
+    maybe_finish_shutdown(chand->server);
     gpr_mu_unlock(&chand->server->mu_global);
-    server_unref(exec_ctx, chand->server);
+    server_unref(chand->server);
   }
 }
 
@@ -1034,11 +999,10 @@ void* grpc_server_register_method(
   return m;
 }
 
-static void start_listeners(grpc_exec_ctx* exec_ctx, void* s,
-                            grpc_error* error) {
+static void start_listeners(void* s, grpc_error* error) {
   grpc_server* server = (grpc_server*)s;
   for (listener* l = server->listeners; l; l = l->next) {
-    l->start(exec_ctx, server, l->arg, server->pollsets, server->pollset_count);
+    l->start(server, l->arg, server->pollsets, server->pollset_count);
   }
 
   gpr_mu_lock(&server->mu_global);
@@ -1046,12 +1010,12 @@ static void start_listeners(grpc_exec_ctx* exec_ctx, void* s,
   gpr_cv_signal(&server->starting_cv);
   gpr_mu_unlock(&server->mu_global);
 
-  server_unref(exec_ctx, server);
+  server_unref(server);
 }
 
 void grpc_server_start(grpc_server* server) {
   size_t i;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_API_TRACE("grpc_server_start(server=%p)", 1, (server));
 
@@ -1073,12 +1037,9 @@ void grpc_server_start(grpc_server* server) {
   server_ref(server);
   server->starting = true;
   GRPC_CLOSURE_SCHED(
-      &exec_ctx,
       GRPC_CLOSURE_CREATE(start_listeners, server,
                           grpc_executor_scheduler(GRPC_EXECUTOR_SHORT)),
       GRPC_ERROR_NONE);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void grpc_server_get_pollsets(grpc_server* server, grpc_pollset*** pollsets,
@@ -1087,8 +1048,7 @@ void grpc_server_get_pollsets(grpc_server* server, grpc_pollset*** pollsets,
   *pollsets = server->pollsets;
 }
 
-void grpc_server_setup_transport(grpc_exec_ctx* exec_ctx, grpc_server* s,
-                                 grpc_transport* transport,
+void grpc_server_setup_transport(grpc_server* s, grpc_transport* transport,
                                  grpc_pollset* accepting_pollset,
                                  const grpc_channel_args* args) {
   size_t num_registered_methods;
@@ -1103,8 +1063,7 @@ void grpc_server_setup_transport(grpc_exec_ctx* exec_ctx, grpc_server* s,
   uint32_t max_probes = 0;
   grpc_transport_op* op = nullptr;
 
-  channel = grpc_channel_create(exec_ctx, nullptr, args, GRPC_SERVER_CHANNEL,
-                                transport);
+  channel = grpc_channel_create(nullptr, args, GRPC_SERVER_CHANNEL, transport);
   chand = (channel_data*)grpc_channel_stack_element(
               grpc_channel_get_channel_stack(channel), 0)
               ->channel_data;
@@ -1181,21 +1140,19 @@ void grpc_server_setup_transport(grpc_exec_ctx* exec_ctx, grpc_server* s,
     op->disconnect_with_error =
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server shutdown");
   }
-  grpc_transport_perform_op(exec_ctx, transport, op);
+  grpc_transport_perform_op(transport, op);
 }
 
-void done_published_shutdown(grpc_exec_ctx* exec_ctx, void* done_arg,
-                             grpc_cq_completion* storage) {
+void done_published_shutdown(void* done_arg, grpc_cq_completion* storage) {
   (void)done_arg;
   gpr_free(storage);
 }
 
-static void listener_destroy_done(grpc_exec_ctx* exec_ctx, void* s,
-                                  grpc_error* error) {
+static void listener_destroy_done(void* s, grpc_error* error) {
   grpc_server* server = (grpc_server*)s;
   gpr_mu_lock(&server->mu_global);
   server->listeners_destroyed++;
-  maybe_finish_shutdown(exec_ctx, server);
+  maybe_finish_shutdown(server);
   gpr_mu_unlock(&server->mu_global);
 }
 
@@ -1204,7 +1161,7 @@ void grpc_server_shutdown_and_notify(grpc_server* server,
   listener* l;
   shutdown_tag* sdt;
   channel_broadcaster broadcaster;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_API_TRACE("grpc_server_shutdown_and_notify(server=%p, cq=%p, tag=%p)", 3,
                  (server, cq, tag));
@@ -1213,17 +1170,16 @@ void grpc_server_shutdown_and_notify(grpc_server* server,
   gpr_mu_lock(&server->mu_global);
   while (server->starting) {
     gpr_cv_wait(&server->starting_cv, &server->mu_global,
-                gpr_inf_future(GPR_CLOCK_REALTIME));
+                gpr_inf_future(GPR_CLOCK_MONOTONIC));
   }
 
   /* stay locked, and gather up some stuff to do */
   GPR_ASSERT(grpc_cq_begin_op(cq, tag));
   if (server->shutdown_published) {
-    grpc_cq_end_op(&exec_ctx, cq, tag, GRPC_ERROR_NONE, done_published_shutdown,
-                   nullptr,
+    grpc_cq_end_op(cq, tag, GRPC_ERROR_NONE, done_published_shutdown, nullptr,
                    (grpc_cq_completion*)gpr_malloc(sizeof(grpc_cq_completion)));
     gpr_mu_unlock(&server->mu_global);
-    goto done;
+    return;
   }
   server->shutdown_tags = (shutdown_tag*)gpr_realloc(
       server->shutdown_tags,
@@ -1233,7 +1189,7 @@ void grpc_server_shutdown_and_notify(grpc_server* server,
   sdt->cq = cq;
   if (gpr_atm_acq_load(&server->shutdown_flag)) {
     gpr_mu_unlock(&server->mu_global);
-    goto done;
+    return;
   }
 
   server->last_shutdown_message_time = gpr_now(GPR_CLOCK_REALTIME);
@@ -1245,30 +1201,26 @@ void grpc_server_shutdown_and_notify(grpc_server* server,
   /* collect all unregistered then registered calls */
   gpr_mu_lock(&server->mu_call);
   kill_pending_work_locked(
-      &exec_ctx, server,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown"));
+      server, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown"));
   gpr_mu_unlock(&server->mu_call);
 
-  maybe_finish_shutdown(&exec_ctx, server);
+  maybe_finish_shutdown(server);
   gpr_mu_unlock(&server->mu_global);
 
   /* Shutdown listeners */
   for (l = server->listeners; l; l = l->next) {
     GRPC_CLOSURE_INIT(&l->destroy_done, listener_destroy_done, server,
                       grpc_schedule_on_exec_ctx);
-    l->destroy(&exec_ctx, server, l->arg, &l->destroy_done);
+    l->destroy(server, l->arg, &l->destroy_done);
   }
 
-  channel_broadcaster_shutdown(&exec_ctx, &broadcaster, true /* send_goaway */,
+  channel_broadcaster_shutdown(&broadcaster, true /* send_goaway */,
                                GRPC_ERROR_NONE);
-
-done:
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void grpc_server_cancel_all_calls(grpc_server* server) {
   channel_broadcaster broadcaster;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_API_TRACE("grpc_server_cancel_all_calls(server=%p)", 1, (server));
 
@@ -1277,14 +1229,13 @@ void grpc_server_cancel_all_calls(grpc_server* server) {
   gpr_mu_unlock(&server->mu_global);
 
   channel_broadcaster_shutdown(
-      &exec_ctx, &broadcaster, false /* send_goaway */,
+      &broadcaster, false /* send_goaway */,
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("Cancelling all calls"));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void grpc_server_destroy(grpc_server* server) {
   listener* l;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_API_TRACE("grpc_server_destroy(server=%p)", 1, (server));
 
@@ -1300,16 +1251,15 @@ void grpc_server_destroy(grpc_server* server) {
 
   gpr_mu_unlock(&server->mu_global);
 
-  server_unref(&exec_ctx, server);
-  grpc_exec_ctx_finish(&exec_ctx);
+  server_unref(server);
 }
 
-void grpc_server_add_listener(
-    grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-    void (*start)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-                  grpc_pollset** pollsets, size_t pollset_count),
-    void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-                    grpc_closure* on_done)) {
+void grpc_server_add_listener(grpc_server* server, void* arg,
+                              void (*start)(grpc_server* server, void* arg,
+                                            grpc_pollset** pollsets,
+                                            size_t pollset_count),
+                              void (*destroy)(grpc_server* server, void* arg,
+                                              grpc_closure* on_done)) {
   listener* l = (listener*)gpr_malloc(sizeof(listener));
   l->arg = arg;
   l->start = start;
@@ -1318,13 +1268,12 @@ void grpc_server_add_listener(
   server->listeners = l;
 }
 
-static grpc_call_error queue_call_request(grpc_exec_ctx* exec_ctx,
-                                          grpc_server* server, size_t cq_idx,
+static grpc_call_error queue_call_request(grpc_server* server, size_t cq_idx,
                                           requested_call* rc) {
   call_data* calld = nullptr;
   request_matcher* rm = nullptr;
   if (gpr_atm_acq_load(&server->shutdown_flag)) {
-    fail_call(exec_ctx, server, cq_idx, rc,
+    fail_call(server, cq_idx, rc,
               GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown"));
     return GRPC_CALL_OK;
   }
@@ -1351,10 +1300,9 @@ static grpc_call_error queue_call_request(grpc_exec_ctx* exec_ctx,
             &calld->kill_zombie_closure, kill_zombie,
             grpc_call_stack_element(grpc_call_get_call_stack(calld->call), 0),
             grpc_schedule_on_exec_ctx);
-        GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure,
-                           GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(&calld->kill_zombie_closure, GRPC_ERROR_NONE);
       } else {
-        publish_call(exec_ctx, server, calld, cq_idx, rc);
+        publish_call(server, calld, cq_idx, rc);
       }
       gpr_mu_lock(&server->mu_call);
     }
@@ -1369,9 +1317,9 @@ grpc_call_error grpc_server_request_call(
     grpc_completion_queue* cq_bound_to_call,
     grpc_completion_queue* cq_for_notification, void* tag) {
   grpc_call_error error;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   requested_call* rc = (requested_call*)gpr_malloc(sizeof(*rc));
-  GRPC_STATS_INC_SERVER_REQUESTED_CALLS(&exec_ctx);
+  GRPC_STATS_INC_SERVER_REQUESTED_CALLS();
   GRPC_API_TRACE(
       "grpc_server_request_call("
       "server=%p, call=%p, details=%p, initial_metadata=%p, "
@@ -1404,9 +1352,9 @@ grpc_call_error grpc_server_request_call(
   rc->call = call;
   rc->data.batch.details = details;
   rc->initial_metadata = initial_metadata;
-  error = queue_call_request(&exec_ctx, server, cq_idx, rc);
+  error = queue_call_request(server, cq_idx, rc);
 done:
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return error;
 }
 
@@ -1416,10 +1364,10 @@ grpc_call_error grpc_server_request_registered_call(
     grpc_completion_queue* cq_bound_to_call,
     grpc_completion_queue* cq_for_notification, void* tag) {
   grpc_call_error error;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   requested_call* rc = (requested_call*)gpr_malloc(sizeof(*rc));
   registered_method* rm = (registered_method*)rmp;
-  GRPC_STATS_INC_SERVER_REQUESTED_CALLS(&exec_ctx);
+  GRPC_STATS_INC_SERVER_REQUESTED_CALLS();
   GRPC_API_TRACE(
       "grpc_server_request_registered_call("
       "server=%p, rmp=%p, call=%p, deadline=%p, initial_metadata=%p, "
@@ -1461,20 +1409,20 @@ grpc_call_error grpc_server_request_registered_call(
   rc->data.registered.deadline = deadline;
   rc->initial_metadata = initial_metadata;
   rc->data.registered.optional_payload = optional_payload;
-  error = queue_call_request(&exec_ctx, server, cq_idx, rc);
+  error = queue_call_request(server, cq_idx, rc);
 done:
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return error;
 }
 
-static void fail_call(grpc_exec_ctx* exec_ctx, grpc_server* server,
-                      size_t cq_idx, requested_call* rc, grpc_error* error) {
+static void fail_call(grpc_server* server, size_t cq_idx, requested_call* rc,
+                      grpc_error* error) {
   *rc->call = nullptr;
   rc->initial_metadata->count = 0;
   GPR_ASSERT(error != GRPC_ERROR_NONE);
 
-  grpc_cq_end_op(exec_ctx, server->cqs[cq_idx], rc->tag, error,
-                 done_request_event, rc, &rc->completion);
+  grpc_cq_end_op(server->cqs[cq_idx], rc->tag, error, done_request_event, rc,
+                 &rc->completion);
 }
 
 const grpc_channel_args* grpc_server_get_channel_args(grpc_server* server) {
diff --git a/src/core/lib/surface/server.h b/src/core/lib/surface/server.h
index d7ec025d95..63b6dff16b 100644
--- a/src/core/lib/surface/server.h
+++ b/src/core/lib/surface/server.h
@@ -31,17 +31,16 @@ extern grpc_core::TraceFlag grpc_server_channel_trace;
 
 /* Add a listener to the server: when the server starts, it will call start,
    and when it shuts down, it will call destroy */
-void grpc_server_add_listener(
-    grpc_exec_ctx* exec_ctx, grpc_server* server, void* listener,
-    void (*start)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-                  grpc_pollset** pollsets, size_t npollsets),
-    void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-                    grpc_closure* on_done));
+void grpc_server_add_listener(grpc_server* server, void* listener,
+                              void (*start)(grpc_server* server, void* arg,
+                                            grpc_pollset** pollsets,
+                                            size_t npollsets),
+                              void (*destroy)(grpc_server* server, void* arg,
+                                              grpc_closure* on_done));
 
 /* Setup a transport - creates a channel stack, binds the transport to the
    server */
-void grpc_server_setup_transport(grpc_exec_ctx* exec_ctx, grpc_server* server,
-                                 grpc_transport* transport,
+void grpc_server_setup_transport(grpc_server* server, grpc_transport* transport,
                                  grpc_pollset* accepting_pollset,
                                  const grpc_channel_args* args);
 
diff --git a/src/core/lib/transport/bdp_estimator.cc b/src/core/lib/transport/bdp_estimator.cc
index bb0e583045..5fcc62ec43 100644
--- a/src/core/lib/transport/bdp_estimator.cc
+++ b/src/core/lib/transport/bdp_estimator.cc
@@ -37,7 +37,7 @@ BdpEstimator::BdpEstimator(const char* name)
       bw_est_(0),
       name_(name) {}
 
-grpc_millis BdpEstimator::CompletePing(grpc_exec_ctx* exec_ctx) {
+grpc_millis BdpEstimator::CompletePing() {
   gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
   gpr_timespec dt_ts = gpr_time_sub(now, ping_start_time_);
   double dt = (double)dt_ts.tv_sec + 1e-9 * (double)dt_ts.tv_nsec;
@@ -78,7 +78,7 @@ grpc_millis BdpEstimator::CompletePing(grpc_exec_ctx* exec_ctx) {
   }
   ping_state_ = PingState::UNSCHEDULED;
   accumulator_ = 0;
-  return grpc_exec_ctx_now(exec_ctx) + inter_ping_delay_;
+  return grpc_core::ExecCtx::Get()->Now() + inter_ping_delay_;
 }
 
 }  // namespace grpc_core
diff --git a/src/core/lib/transport/bdp_estimator.h b/src/core/lib/transport/bdp_estimator.h
index df3a86c5f1..e703af121c 100644
--- a/src/core/lib/transport/bdp_estimator.h
+++ b/src/core/lib/transport/bdp_estimator.h
@@ -73,7 +73,7 @@ class BdpEstimator {
   }
 
   // Completes a previously started ping, returns when to schedule the next one
-  grpc_millis CompletePing(grpc_exec_ctx* exec_ctx);
+  grpc_millis CompletePing();
 
  private:
   enum class PingState { UNSCHEDULED, SCHEDULED, STARTED };
diff --git a/src/core/lib/transport/byte_stream.cc b/src/core/lib/transport/byte_stream.cc
index b8720250e7..8dcb1e0bdb 100644
--- a/src/core/lib/transport/byte_stream.cc
+++ b/src/core/lib/transport/byte_stream.cc
@@ -25,34 +25,28 @@
 
 #include "src/core/lib/slice/slice_internal.h"
 
-bool grpc_byte_stream_next(grpc_exec_ctx* exec_ctx,
-                           grpc_byte_stream* byte_stream, size_t max_size_hint,
+bool grpc_byte_stream_next(grpc_byte_stream* byte_stream, size_t max_size_hint,
                            grpc_closure* on_complete) {
-  return byte_stream->vtable->next(exec_ctx, byte_stream, max_size_hint,
-                                   on_complete);
+  return byte_stream->vtable->next(byte_stream, max_size_hint, on_complete);
 }
 
-grpc_error* grpc_byte_stream_pull(grpc_exec_ctx* exec_ctx,
-                                  grpc_byte_stream* byte_stream,
+grpc_error* grpc_byte_stream_pull(grpc_byte_stream* byte_stream,
                                   grpc_slice* slice) {
-  return byte_stream->vtable->pull(exec_ctx, byte_stream, slice);
+  return byte_stream->vtable->pull(byte_stream, slice);
 }
 
-void grpc_byte_stream_shutdown(grpc_exec_ctx* exec_ctx,
-                               grpc_byte_stream* byte_stream,
+void grpc_byte_stream_shutdown(grpc_byte_stream* byte_stream,
                                grpc_error* error) {
-  byte_stream->vtable->shutdown(exec_ctx, byte_stream, error);
+  byte_stream->vtable->shutdown(byte_stream, error);
 }
 
-void grpc_byte_stream_destroy(grpc_exec_ctx* exec_ctx,
-                              grpc_byte_stream* byte_stream) {
-  byte_stream->vtable->destroy(exec_ctx, byte_stream);
+void grpc_byte_stream_destroy(grpc_byte_stream* byte_stream) {
+  byte_stream->vtable->destroy(byte_stream);
 }
 
 // grpc_slice_buffer_stream
 
-static bool slice_buffer_stream_next(grpc_exec_ctx* exec_ctx,
-                                     grpc_byte_stream* byte_stream,
+static bool slice_buffer_stream_next(grpc_byte_stream* byte_stream,
                                      size_t max_size_hint,
                                      grpc_closure* on_complete) {
   grpc_slice_buffer_stream* stream = (grpc_slice_buffer_stream*)byte_stream;
@@ -60,8 +54,7 @@ static bool slice_buffer_stream_next(grpc_exec_ctx* exec_ctx,
   return true;
 }
 
-static grpc_error* slice_buffer_stream_pull(grpc_exec_ctx* exec_ctx,
-                                            grpc_byte_stream* byte_stream,
+static grpc_error* slice_buffer_stream_pull(grpc_byte_stream* byte_stream,
                                             grpc_slice* slice) {
   grpc_slice_buffer_stream* stream = (grpc_slice_buffer_stream*)byte_stream;
   if (stream->shutdown_error != GRPC_ERROR_NONE) {
@@ -74,18 +67,16 @@ static grpc_error* slice_buffer_stream_pull(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static void slice_buffer_stream_shutdown(grpc_exec_ctx* exec_ctx,
-                                         grpc_byte_stream* byte_stream,
+static void slice_buffer_stream_shutdown(grpc_byte_stream* byte_stream,
                                          grpc_error* error) {
   grpc_slice_buffer_stream* stream = (grpc_slice_buffer_stream*)byte_stream;
   GRPC_ERROR_UNREF(stream->shutdown_error);
   stream->shutdown_error = error;
 }
 
-static void slice_buffer_stream_destroy(grpc_exec_ctx* exec_ctx,
-                                        grpc_byte_stream* byte_stream) {
+static void slice_buffer_stream_destroy(grpc_byte_stream* byte_stream) {
   grpc_slice_buffer_stream* stream = (grpc_slice_buffer_stream*)byte_stream;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, stream->backing_buffer);
+  grpc_slice_buffer_reset_and_unref_internal(stream->backing_buffer);
   GRPC_ERROR_UNREF(stream->shutdown_error);
 }
 
@@ -113,25 +104,22 @@ void grpc_byte_stream_cache_init(grpc_byte_stream_cache* cache,
   grpc_slice_buffer_init(&cache->cache_buffer);
 }
 
-void grpc_byte_stream_cache_destroy(grpc_exec_ctx* exec_ctx,
-                                    grpc_byte_stream_cache* cache) {
-  grpc_byte_stream_destroy(exec_ctx, cache->underlying_stream);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &cache->cache_buffer);
+void grpc_byte_stream_cache_destroy(grpc_byte_stream_cache* cache) {
+  grpc_byte_stream_destroy(cache->underlying_stream);
+  grpc_slice_buffer_destroy_internal(&cache->cache_buffer);
 }
 
-static bool caching_byte_stream_next(grpc_exec_ctx* exec_ctx,
-                                     grpc_byte_stream* byte_stream,
+static bool caching_byte_stream_next(grpc_byte_stream* byte_stream,
                                      size_t max_size_hint,
                                      grpc_closure* on_complete) {
   grpc_caching_byte_stream* stream = (grpc_caching_byte_stream*)byte_stream;
   if (stream->shutdown_error != GRPC_ERROR_NONE) return true;
   if (stream->cursor < stream->cache->cache_buffer.count) return true;
-  return grpc_byte_stream_next(exec_ctx, stream->cache->underlying_stream,
-                               max_size_hint, on_complete);
+  return grpc_byte_stream_next(stream->cache->underlying_stream, max_size_hint,
+                               on_complete);
 }
 
-static grpc_error* caching_byte_stream_pull(grpc_exec_ctx* exec_ctx,
-                                            grpc_byte_stream* byte_stream,
+static grpc_error* caching_byte_stream_pull(grpc_byte_stream* byte_stream,
                                             grpc_slice* slice) {
   grpc_caching_byte_stream* stream = (grpc_caching_byte_stream*)byte_stream;
   if (stream->shutdown_error != GRPC_ERROR_NONE) {
@@ -144,7 +132,7 @@ static grpc_error* caching_byte_stream_pull(grpc_exec_ctx* exec_ctx,
     return GRPC_ERROR_NONE;
   }
   grpc_error* error =
-      grpc_byte_stream_pull(exec_ctx, stream->cache->underlying_stream, slice);
+      grpc_byte_stream_pull(stream->cache->underlying_stream, slice);
   if (error == GRPC_ERROR_NONE) {
     ++stream->cursor;
     grpc_slice_buffer_add(&stream->cache->cache_buffer,
@@ -153,17 +141,15 @@ static grpc_error* caching_byte_stream_pull(grpc_exec_ctx* exec_ctx,
   return error;
 }
 
-static void caching_byte_stream_shutdown(grpc_exec_ctx* exec_ctx,
-                                         grpc_byte_stream* byte_stream,
+static void caching_byte_stream_shutdown(grpc_byte_stream* byte_stream,
                                          grpc_error* error) {
   grpc_caching_byte_stream* stream = (grpc_caching_byte_stream*)byte_stream;
   GRPC_ERROR_UNREF(stream->shutdown_error);
   stream->shutdown_error = GRPC_ERROR_REF(error);
-  grpc_byte_stream_shutdown(exec_ctx, stream->cache->underlying_stream, error);
+  grpc_byte_stream_shutdown(stream->cache->underlying_stream, error);
 }
 
-static void caching_byte_stream_destroy(grpc_exec_ctx* exec_ctx,
-                                        grpc_byte_stream* byte_stream) {
+static void caching_byte_stream_destroy(grpc_byte_stream* byte_stream) {
   grpc_caching_byte_stream* stream = (grpc_caching_byte_stream*)byte_stream;
   GRPC_ERROR_UNREF(stream->shutdown_error);
 }
diff --git a/src/core/lib/transport/byte_stream.h b/src/core/lib/transport/byte_stream.h
index 6bca154cb5..52c7a07f56 100644
--- a/src/core/lib/transport/byte_stream.h
+++ b/src/core/lib/transport/byte_stream.h
@@ -31,13 +31,11 @@
 typedef struct grpc_byte_stream grpc_byte_stream;
 
 typedef struct {
-  bool (*next)(grpc_exec_ctx* exec_ctx, grpc_byte_stream* byte_stream,
-               size_t max_size_hint, grpc_closure* on_complete);
-  grpc_error* (*pull)(grpc_exec_ctx* exec_ctx, grpc_byte_stream* byte_stream,
-                      grpc_slice* slice);
-  void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_byte_stream* byte_stream,
-                   grpc_error* error);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_byte_stream* byte_stream);
+  bool (*next)(grpc_byte_stream* byte_stream, size_t max_size_hint,
+               grpc_closure* on_complete);
+  grpc_error* (*pull)(grpc_byte_stream* byte_stream, grpc_slice* slice);
+  void (*shutdown)(grpc_byte_stream* byte_stream, grpc_error* error);
+  void (*destroy)(grpc_byte_stream* byte_stream);
 } grpc_byte_stream_vtable;
 
 struct grpc_byte_stream {
@@ -52,8 +50,7 @@ struct grpc_byte_stream {
 //
 // max_size_hint can be set as a hint as to the maximum number
 // of bytes that would be acceptable to read.
-bool grpc_byte_stream_next(grpc_exec_ctx* exec_ctx,
-                           grpc_byte_stream* byte_stream, size_t max_size_hint,
+bool grpc_byte_stream_next(grpc_byte_stream* byte_stream, size_t max_size_hint,
                            grpc_closure* on_complete);
 
 // Returns the next slice in the byte stream when it is ready (indicated by
@@ -61,8 +58,7 @@ bool grpc_byte_stream_next(grpc_exec_ctx* exec_ctx,
 // grpc_byte_stream_next is called).
 //
 // Once a slice is returned into *slice, it is owned by the caller.
-grpc_error* grpc_byte_stream_pull(grpc_exec_ctx* exec_ctx,
-                                  grpc_byte_stream* byte_stream,
+grpc_error* grpc_byte_stream_pull(grpc_byte_stream* byte_stream,
                                   grpc_slice* slice);
 
 // Shuts down the byte stream.
@@ -72,12 +68,10 @@ grpc_error* grpc_byte_stream_pull(grpc_exec_ctx* exec_ctx,
 //
 // The next call to grpc_byte_stream_pull() (if any) will return the error
 // passed to grpc_byte_stream_shutdown().
-void grpc_byte_stream_shutdown(grpc_exec_ctx* exec_ctx,
-                               grpc_byte_stream* byte_stream,
+void grpc_byte_stream_shutdown(grpc_byte_stream* byte_stream,
                                grpc_error* error);
 
-void grpc_byte_stream_destroy(grpc_exec_ctx* exec_ctx,
-                              grpc_byte_stream* byte_stream);
+void grpc_byte_stream_destroy(grpc_byte_stream* byte_stream);
 
 // grpc_slice_buffer_stream
 //
@@ -119,8 +113,7 @@ void grpc_byte_stream_cache_init(grpc_byte_stream_cache* cache,
                                  grpc_byte_stream* underlying_stream);
 
 // Must not be called while still in use by a grpc_caching_byte_stream.
-void grpc_byte_stream_cache_destroy(grpc_exec_ctx* exec_ctx,
-                                    grpc_byte_stream_cache* cache);
+void grpc_byte_stream_cache_destroy(grpc_byte_stream_cache* cache);
 
 typedef struct {
   grpc_byte_stream base;
diff --git a/src/core/lib/transport/connectivity_state.cc b/src/core/lib/transport/connectivity_state.cc
index e7e5dbd1f1..c42cc9c8d0 100644
--- a/src/core/lib/transport/connectivity_state.cc
+++ b/src/core/lib/transport/connectivity_state.cc
@@ -51,8 +51,7 @@ void grpc_connectivity_state_init(grpc_connectivity_state_tracker* tracker,
   tracker->name = gpr_strdup(name);
 }
 
-void grpc_connectivity_state_destroy(grpc_exec_ctx* exec_ctx,
-                                     grpc_connectivity_state_tracker* tracker) {
+void grpc_connectivity_state_destroy(grpc_connectivity_state_tracker* tracker) {
   grpc_error* error;
   grpc_connectivity_state_watcher* w;
   while ((w = tracker->watchers)) {
@@ -65,7 +64,7 @@ void grpc_connectivity_state_destroy(grpc_exec_ctx* exec_ctx,
       error =
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Shutdown connectivity owner");
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, w->notify, error);
+    GRPC_CLOSURE_SCHED(w->notify, error);
     gpr_free(w);
   }
   GRPC_ERROR_UNREF(tracker->current_error);
@@ -105,8 +104,8 @@ bool grpc_connectivity_state_has_watchers(
 }
 
 bool grpc_connectivity_state_notify_on_state_change(
-    grpc_exec_ctx* exec_ctx, grpc_connectivity_state_tracker* tracker,
-    grpc_connectivity_state* current, grpc_closure* notify) {
+    grpc_connectivity_state_tracker* tracker, grpc_connectivity_state* current,
+    grpc_closure* notify) {
   grpc_connectivity_state cur =
       (grpc_connectivity_state)gpr_atm_no_barrier_load(
           &tracker->current_state_atm);
@@ -123,7 +122,7 @@ bool grpc_connectivity_state_notify_on_state_change(
   if (current == nullptr) {
     grpc_connectivity_state_watcher* w = tracker->watchers;
     if (w != nullptr && w->notify == notify) {
-      GRPC_CLOSURE_SCHED(exec_ctx, notify, GRPC_ERROR_CANCELLED);
+      GRPC_CLOSURE_SCHED(notify, GRPC_ERROR_CANCELLED);
       tracker->watchers = w->next;
       gpr_free(w);
       return false;
@@ -131,7 +130,7 @@ bool grpc_connectivity_state_notify_on_state_change(
     while (w != nullptr) {
       grpc_connectivity_state_watcher* rm_candidate = w->next;
       if (rm_candidate != nullptr && rm_candidate->notify == notify) {
-        GRPC_CLOSURE_SCHED(exec_ctx, notify, GRPC_ERROR_CANCELLED);
+        GRPC_CLOSURE_SCHED(notify, GRPC_ERROR_CANCELLED);
         w->next = w->next->next;
         gpr_free(rm_candidate);
         return false;
@@ -142,8 +141,7 @@ bool grpc_connectivity_state_notify_on_state_change(
   } else {
     if (cur != *current) {
       *current = cur;
-      GRPC_CLOSURE_SCHED(exec_ctx, notify,
-                         GRPC_ERROR_REF(tracker->current_error));
+      GRPC_CLOSURE_SCHED(notify, GRPC_ERROR_REF(tracker->current_error));
     } else {
       grpc_connectivity_state_watcher* w =
           (grpc_connectivity_state_watcher*)gpr_malloc(sizeof(*w));
@@ -156,8 +154,7 @@ bool grpc_connectivity_state_notify_on_state_change(
   }
 }
 
-void grpc_connectivity_state_set(grpc_exec_ctx* exec_ctx,
-                                 grpc_connectivity_state_tracker* tracker,
+void grpc_connectivity_state_set(grpc_connectivity_state_tracker* tracker,
                                  grpc_connectivity_state state,
                                  grpc_error* error, const char* reason) {
   grpc_connectivity_state cur =
@@ -195,8 +192,7 @@ void grpc_connectivity_state_set(grpc_exec_ctx* exec_ctx,
       gpr_log(GPR_DEBUG, "NOTIFY: %p %s: %p", tracker, tracker->name,
               w->notify);
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, w->notify,
-                       GRPC_ERROR_REF(tracker->current_error));
+    GRPC_CLOSURE_SCHED(w->notify, GRPC_ERROR_REF(tracker->current_error));
     gpr_free(w);
   }
 }
diff --git a/src/core/lib/transport/connectivity_state.h b/src/core/lib/transport/connectivity_state.h
index 653637ebea..c3a50f3211 100644
--- a/src/core/lib/transport/connectivity_state.h
+++ b/src/core/lib/transport/connectivity_state.h
@@ -51,13 +51,11 @@ const char* grpc_connectivity_state_name(grpc_connectivity_state state);
 void grpc_connectivity_state_init(grpc_connectivity_state_tracker* tracker,
                                   grpc_connectivity_state init_state,
                                   const char* name);
-void grpc_connectivity_state_destroy(grpc_exec_ctx* exec_ctx,
-                                     grpc_connectivity_state_tracker* tracker);
+void grpc_connectivity_state_destroy(grpc_connectivity_state_tracker* tracker);
 
 /** Set connectivity state; not thread safe; access must be serialized with an
  *  external lock */
-void grpc_connectivity_state_set(grpc_exec_ctx* exec_ctx,
-                                 grpc_connectivity_state_tracker* tracker,
+void grpc_connectivity_state_set(grpc_connectivity_state_tracker* tracker,
                                  grpc_connectivity_state state,
                                  grpc_error* associated_error,
                                  const char* reason);
@@ -81,7 +79,7 @@ grpc_connectivity_state grpc_connectivity_state_get(
     case).
     Access must be serialized with an external lock. */
 bool grpc_connectivity_state_notify_on_state_change(
-    grpc_exec_ctx* exec_ctx, grpc_connectivity_state_tracker* tracker,
-    grpc_connectivity_state* current, grpc_closure* notify);
+    grpc_connectivity_state_tracker* tracker, grpc_connectivity_state* current,
+    grpc_closure* notify);
 
 #endif /* GRPC_CORE_LIB_TRANSPORT_CONNECTIVITY_STATE_H */
diff --git a/src/core/lib/transport/error_utils.cc b/src/core/lib/transport/error_utils.cc
index 69c8ae6de3..ffaf327081 100644
--- a/src/core/lib/transport/error_utils.cc
+++ b/src/core/lib/transport/error_utils.cc
@@ -40,9 +40,9 @@ static grpc_error* recursively_find_error_with_field(grpc_error* error,
   return nullptr;
 }
 
-void grpc_error_get_status(grpc_exec_ctx* exec_ctx, grpc_error* error,
-                           grpc_millis deadline, grpc_status_code* code,
-                           grpc_slice* slice, grpc_http2_error_code* http_error,
+void grpc_error_get_status(grpc_error* error, grpc_millis deadline,
+                           grpc_status_code* code, grpc_slice* slice,
+                           grpc_http2_error_code* http_error,
                            const char** error_string) {
   // Start with the parent error and recurse through the tree of children
   // until we find the first one that has a status code.
@@ -65,8 +65,8 @@ void grpc_error_get_status(grpc_exec_ctx* exec_ctx, grpc_error* error,
     status = (grpc_status_code)integer;
   } else if (grpc_error_get_int(found_error, GRPC_ERROR_INT_HTTP2_ERROR,
                                 &integer)) {
-    status = grpc_http2_error_to_grpc_status(
-        exec_ctx, (grpc_http2_error_code)integer, deadline);
+    status = grpc_http2_error_to_grpc_status((grpc_http2_error_code)integer,
+                                             deadline);
   }
   if (code != nullptr) *code = status;
 
diff --git a/src/core/lib/transport/error_utils.h b/src/core/lib/transport/error_utils.h
index 8b006ae992..4100f65d6d 100644
--- a/src/core/lib/transport/error_utils.h
+++ b/src/core/lib/transport/error_utils.h
@@ -30,9 +30,8 @@
 /// be populated with the entire error string. If any of the attributes (code,
 /// msg, http_status, error_string) are unneeded, they can be passed as
 /// NULL.
-void grpc_error_get_status(grpc_exec_ctx* exec_ctx, grpc_error* error,
-                           grpc_millis deadline, grpc_status_code* code,
-                           grpc_slice* slice,
+void grpc_error_get_status(grpc_error* error, grpc_millis deadline,
+                           grpc_status_code* code, grpc_slice* slice,
                            grpc_http2_error_code* http_status,
                            const char** error_string);
 
diff --git a/src/core/lib/transport/metadata.cc b/src/core/lib/transport/metadata.cc
index 0f30c7533d..5f0673e014 100644
--- a/src/core/lib/transport/metadata.cc
+++ b/src/core/lib/transport/metadata.cc
@@ -108,7 +108,7 @@ typedef struct mdtab_shard {
 
 static mdtab_shard g_shards[SHARD_COUNT];
 
-static void gc_mdtab(grpc_exec_ctx* exec_ctx, mdtab_shard* shard);
+static void gc_mdtab(mdtab_shard* shard);
 
 void grpc_mdctx_global_init(void) {
   /* initialize shards */
@@ -123,11 +123,11 @@ void grpc_mdctx_global_init(void) {
   }
 }
 
-void grpc_mdctx_global_shutdown(grpc_exec_ctx* exec_ctx) {
+void grpc_mdctx_global_shutdown() {
   for (size_t i = 0; i < SHARD_COUNT; i++) {
     mdtab_shard* shard = &g_shards[i];
     gpr_mu_destroy(&shard->mu);
-    gc_mdtab(exec_ctx, shard);
+    gc_mdtab(shard);
     /* TODO(ctiller): GPR_ASSERT(shard->count == 0); */
     if (shard->count != 0) {
       gpr_log(GPR_DEBUG, "WARNING: %" PRIuPTR " metadata elements were leaked",
@@ -165,7 +165,7 @@ static void ref_md_locked(mdtab_shard* shard,
   }
 }
 
-static void gc_mdtab(grpc_exec_ctx* exec_ctx, mdtab_shard* shard) {
+static void gc_mdtab(mdtab_shard* shard) {
   size_t i;
   interned_metadata** prev_next;
   interned_metadata *md, *next;
@@ -178,8 +178,8 @@ static void gc_mdtab(grpc_exec_ctx* exec_ctx, mdtab_shard* shard) {
       void* user_data = (void*)gpr_atm_no_barrier_load(&md->user_data);
       next = md->bucket_next;
       if (gpr_atm_acq_load(&md->refcnt) == 0) {
-        grpc_slice_unref_internal(exec_ctx, md->key);
-        grpc_slice_unref_internal(exec_ctx, md->value);
+        grpc_slice_unref_internal(md->key);
+        grpc_slice_unref_internal(md->value);
         if (md->user_data) {
           ((destroy_user_data_func)gpr_atm_no_barrier_load(
               &md->destroy_user_data))(user_data);
@@ -228,17 +228,17 @@ static void grow_mdtab(mdtab_shard* shard) {
   GPR_TIMER_END("grow_mdtab", 0);
 }
 
-static void rehash_mdtab(grpc_exec_ctx* exec_ctx, mdtab_shard* shard) {
+static void rehash_mdtab(mdtab_shard* shard) {
   if (gpr_atm_no_barrier_load(&shard->free_estimate) >
       (gpr_atm)(shard->capacity / 4)) {
-    gc_mdtab(exec_ctx, shard);
+    gc_mdtab(shard);
   } else {
     grow_mdtab(shard);
   }
 }
 
 grpc_mdelem grpc_mdelem_create(
-    grpc_exec_ctx* exec_ctx, grpc_slice key, grpc_slice value,
+    grpc_slice key, grpc_slice value,
     grpc_mdelem_data* compatible_external_backing_store) {
   if (!grpc_slice_is_interned(key) || !grpc_slice_is_interned(value)) {
     if (compatible_external_backing_store != nullptr) {
@@ -318,7 +318,7 @@ grpc_mdelem grpc_mdelem_create(
   shard->count++;
 
   if (shard->count > shard->capacity * 2) {
-    rehash_mdtab(exec_ctx, shard);
+    rehash_mdtab(shard);
   }
 
   gpr_mu_unlock(&shard->mu);
@@ -328,22 +328,20 @@ grpc_mdelem grpc_mdelem_create(
   return GRPC_MAKE_MDELEM(md, GRPC_MDELEM_STORAGE_INTERNED);
 }
 
-grpc_mdelem grpc_mdelem_from_slices(grpc_exec_ctx* exec_ctx, grpc_slice key,
-                                    grpc_slice value) {
-  grpc_mdelem out = grpc_mdelem_create(exec_ctx, key, value, nullptr);
-  grpc_slice_unref_internal(exec_ctx, key);
-  grpc_slice_unref_internal(exec_ctx, value);
+grpc_mdelem grpc_mdelem_from_slices(grpc_slice key, grpc_slice value) {
+  grpc_mdelem out = grpc_mdelem_create(key, value, nullptr);
+  grpc_slice_unref_internal(key);
+  grpc_slice_unref_internal(value);
   return out;
 }
 
-grpc_mdelem grpc_mdelem_from_grpc_metadata(grpc_exec_ctx* exec_ctx,
-                                           grpc_metadata* metadata) {
+grpc_mdelem grpc_mdelem_from_grpc_metadata(grpc_metadata* metadata) {
   bool changed = false;
   grpc_slice key_slice =
       grpc_slice_maybe_static_intern(metadata->key, &changed);
   grpc_slice value_slice =
       grpc_slice_maybe_static_intern(metadata->value, &changed);
-  return grpc_mdelem_create(exec_ctx, key_slice, value_slice,
+  return grpc_mdelem_create(key_slice, value_slice,
                             changed ? nullptr : (grpc_mdelem_data*)metadata);
 }
 
@@ -417,7 +415,7 @@ grpc_mdelem grpc_mdelem_ref(grpc_mdelem gmd DEBUG_ARGS) {
   return gmd;
 }
 
-void grpc_mdelem_unref(grpc_exec_ctx* exec_ctx, grpc_mdelem gmd DEBUG_ARGS) {
+void grpc_mdelem_unref(grpc_mdelem gmd DEBUG_ARGS) {
   switch (GRPC_MDELEM_STORAGE(gmd)) {
     case GRPC_MDELEM_STORAGE_EXTERNAL:
     case GRPC_MDELEM_STORAGE_STATIC:
@@ -465,8 +463,8 @@ void grpc_mdelem_unref(grpc_exec_ctx* exec_ctx, grpc_mdelem gmd DEBUG_ARGS) {
       const gpr_atm prev_refcount = gpr_atm_full_fetch_add(&md->refcnt, -1);
       GPR_ASSERT(prev_refcount >= 1);
       if (1 == prev_refcount) {
-        grpc_slice_unref_internal(exec_ctx, md->key);
-        grpc_slice_unref_internal(exec_ctx, md->value);
+        grpc_slice_unref_internal(md->key);
+        grpc_slice_unref_internal(md->value);
         gpr_free(md);
       }
       break;
diff --git a/src/core/lib/transport/metadata.h b/src/core/lib/transport/metadata.h
index 8d4868d031..78e6beff9b 100644
--- a/src/core/lib/transport/metadata.h
+++ b/src/core/lib/transport/metadata.h
@@ -107,20 +107,18 @@ struct grpc_mdelem {
                               (uintptr_t)GRPC_MDELEM_STORAGE_INTERNED_BIT))
 
 /* Unrefs the slices. */
-grpc_mdelem grpc_mdelem_from_slices(grpc_exec_ctx* exec_ctx, grpc_slice key,
-                                    grpc_slice value);
+grpc_mdelem grpc_mdelem_from_slices(grpc_slice key, grpc_slice value);
 
 /* Cheaply convert a grpc_metadata to a grpc_mdelem; may use the grpc_metadata
    object as backing storage (so lifetimes should align) */
-grpc_mdelem grpc_mdelem_from_grpc_metadata(grpc_exec_ctx* exec_ctx,
-                                           grpc_metadata* metadata);
+grpc_mdelem grpc_mdelem_from_grpc_metadata(grpc_metadata* metadata);
 
 /* Does not unref the slices; if a new non-interned mdelem is needed, allocates
    one if compatible_external_backing_store is NULL, or uses
    compatible_external_backing_store if it is non-NULL (in which case it's the
    users responsibility to ensure that it outlives usage) */
 grpc_mdelem grpc_mdelem_create(
-    grpc_exec_ctx* exec_ctx, grpc_slice key, grpc_slice value,
+    grpc_slice key, grpc_slice value,
     grpc_mdelem_data* compatible_external_backing_store);
 
 bool grpc_mdelem_eq(grpc_mdelem a, grpc_mdelem b);
@@ -136,16 +134,14 @@ void* grpc_mdelem_set_user_data(grpc_mdelem md, void (*destroy_func)(void*),
 
 #ifndef NDEBUG
 #define GRPC_MDELEM_REF(s) grpc_mdelem_ref((s), __FILE__, __LINE__)
-#define GRPC_MDELEM_UNREF(exec_ctx, s) \
-  grpc_mdelem_unref((exec_ctx), (s), __FILE__, __LINE__)
+#define GRPC_MDELEM_UNREF(s) grpc_mdelem_unref((s), __FILE__, __LINE__)
 grpc_mdelem grpc_mdelem_ref(grpc_mdelem md, const char* file, int line);
-void grpc_mdelem_unref(grpc_exec_ctx* exec_ctx, grpc_mdelem md,
-                       const char* file, int line);
+void grpc_mdelem_unref(grpc_mdelem md, const char* file, int line);
 #else
 #define GRPC_MDELEM_REF(s) grpc_mdelem_ref((s))
-#define GRPC_MDELEM_UNREF(exec_ctx, s) grpc_mdelem_unref((exec_ctx), (s))
+#define GRPC_MDELEM_UNREF(s) grpc_mdelem_unref((s))
 grpc_mdelem grpc_mdelem_ref(grpc_mdelem md);
-void grpc_mdelem_unref(grpc_exec_ctx* exec_ctx, grpc_mdelem md);
+void grpc_mdelem_unref(grpc_mdelem md);
 #endif
 
 #define GRPC_MDKEY(md) (GRPC_MDELEM_DATA(md)->key)
@@ -162,6 +158,6 @@ void grpc_mdelem_unref(grpc_exec_ctx* exec_ctx, grpc_mdelem md);
 #define GRPC_MDSTR_KV_HASH(k_hash, v_hash) (GPR_ROTL((k_hash), 2) ^ (v_hash))
 
 void grpc_mdctx_global_init(void);
-void grpc_mdctx_global_shutdown(grpc_exec_ctx* exec_ctx);
+void grpc_mdctx_global_shutdown();
 
 #endif /* GRPC_CORE_LIB_TRANSPORT_METADATA_H */
diff --git a/src/core/lib/transport/metadata_batch.cc b/src/core/lib/transport/metadata_batch.cc
index 5817765aa3..9c95339ba0 100644
--- a/src/core/lib/transport/metadata_batch.cc
+++ b/src/core/lib/transport/metadata_batch.cc
@@ -51,8 +51,7 @@ static void assert_valid_list(grpc_mdelem_list* list) {
 #endif /* NDEBUG */
 }
 
-static void assert_valid_callouts(grpc_exec_ctx* exec_ctx,
-                                  grpc_metadata_batch* batch) {
+static void assert_valid_callouts(grpc_metadata_batch* batch) {
 #ifndef NDEBUG
   for (grpc_linked_mdelem* l = batch->list.head; l != nullptr; l = l->next) {
     grpc_slice key_interned = grpc_slice_intern(GRPC_MDKEY(l->md));
@@ -61,7 +60,7 @@ static void assert_valid_callouts(grpc_exec_ctx* exec_ctx,
     if (callout_idx != GRPC_BATCH_CALLOUTS_COUNT) {
       GPR_ASSERT(batch->idx.array[callout_idx] == l);
     }
-    grpc_slice_unref_internal(exec_ctx, key_interned);
+    grpc_slice_unref_internal(key_interned);
   }
 #endif
 }
@@ -77,11 +76,10 @@ void grpc_metadata_batch_init(grpc_metadata_batch* batch) {
   batch->deadline = GRPC_MILLIS_INF_FUTURE;
 }
 
-void grpc_metadata_batch_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_metadata_batch* batch) {
+void grpc_metadata_batch_destroy(grpc_metadata_batch* batch) {
   grpc_linked_mdelem* l;
   for (l = batch->list.head; l; l = l->next) {
-    GRPC_MDELEM_UNREF(exec_ctx, l->md);
+    GRPC_MDELEM_UNREF(l->md);
   }
 }
 
@@ -126,13 +124,12 @@ static void maybe_unlink_callout(grpc_metadata_batch* batch,
   batch->idx.array[idx] = nullptr;
 }
 
-grpc_error* grpc_metadata_batch_add_head(grpc_exec_ctx* exec_ctx,
-                                         grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_add_head(grpc_metadata_batch* batch,
                                          grpc_linked_mdelem* storage,
                                          grpc_mdelem elem_to_add) {
   GPR_ASSERT(!GRPC_MDISNULL(elem_to_add));
   storage->md = elem_to_add;
-  return grpc_metadata_batch_link_head(exec_ctx, batch, storage);
+  return grpc_metadata_batch_link_head(batch, storage);
 }
 
 static void link_head(grpc_mdelem_list* list, grpc_linked_mdelem* storage) {
@@ -150,27 +147,25 @@ static void link_head(grpc_mdelem_list* list, grpc_linked_mdelem* storage) {
   assert_valid_list(list);
 }
 
-grpc_error* grpc_metadata_batch_link_head(grpc_exec_ctx* exec_ctx,
-                                          grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_link_head(grpc_metadata_batch* batch,
                                           grpc_linked_mdelem* storage) {
-  assert_valid_callouts(exec_ctx, batch);
+  assert_valid_callouts(batch);
   grpc_error* err = maybe_link_callout(batch, storage);
   if (err != GRPC_ERROR_NONE) {
-    assert_valid_callouts(exec_ctx, batch);
+    assert_valid_callouts(batch);
     return err;
   }
   link_head(&batch->list, storage);
-  assert_valid_callouts(exec_ctx, batch);
+  assert_valid_callouts(batch);
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_metadata_batch_add_tail(grpc_exec_ctx* exec_ctx,
-                                         grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_add_tail(grpc_metadata_batch* batch,
                                          grpc_linked_mdelem* storage,
                                          grpc_mdelem elem_to_add) {
   GPR_ASSERT(!GRPC_MDISNULL(elem_to_add));
   storage->md = elem_to_add;
-  return grpc_metadata_batch_link_tail(exec_ctx, batch, storage);
+  return grpc_metadata_batch_link_tail(batch, storage);
 }
 
 static void link_tail(grpc_mdelem_list* list, grpc_linked_mdelem* storage) {
@@ -189,17 +184,16 @@ static void link_tail(grpc_mdelem_list* list, grpc_linked_mdelem* storage) {
   assert_valid_list(list);
 }
 
-grpc_error* grpc_metadata_batch_link_tail(grpc_exec_ctx* exec_ctx,
-                                          grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_link_tail(grpc_metadata_batch* batch,
                                           grpc_linked_mdelem* storage) {
-  assert_valid_callouts(exec_ctx, batch);
+  assert_valid_callouts(batch);
   grpc_error* err = maybe_link_callout(batch, storage);
   if (err != GRPC_ERROR_NONE) {
-    assert_valid_callouts(exec_ctx, batch);
+    assert_valid_callouts(batch);
     return err;
   }
   link_tail(&batch->list, storage);
-  assert_valid_callouts(exec_ctx, batch);
+  assert_valid_callouts(batch);
   return GRPC_ERROR_NONE;
 }
 
@@ -220,31 +214,28 @@ static void unlink_storage(grpc_mdelem_list* list,
   assert_valid_list(list);
 }
 
-void grpc_metadata_batch_remove(grpc_exec_ctx* exec_ctx,
-                                grpc_metadata_batch* batch,
+void grpc_metadata_batch_remove(grpc_metadata_batch* batch,
                                 grpc_linked_mdelem* storage) {
-  assert_valid_callouts(exec_ctx, batch);
+  assert_valid_callouts(batch);
   maybe_unlink_callout(batch, storage);
   unlink_storage(&batch->list, storage);
-  GRPC_MDELEM_UNREF(exec_ctx, storage->md);
-  assert_valid_callouts(exec_ctx, batch);
+  GRPC_MDELEM_UNREF(storage->md);
+  assert_valid_callouts(batch);
 }
 
-void grpc_metadata_batch_set_value(grpc_exec_ctx* exec_ctx,
-                                   grpc_linked_mdelem* storage,
+void grpc_metadata_batch_set_value(grpc_linked_mdelem* storage,
                                    grpc_slice value) {
   grpc_mdelem old_mdelem = storage->md;
   grpc_mdelem new_mdelem = grpc_mdelem_from_slices(
-      exec_ctx, grpc_slice_ref_internal(GRPC_MDKEY(old_mdelem)), value);
+      grpc_slice_ref_internal(GRPC_MDKEY(old_mdelem)), value);
   storage->md = new_mdelem;
-  GRPC_MDELEM_UNREF(exec_ctx, old_mdelem);
+  GRPC_MDELEM_UNREF(old_mdelem);
 }
 
-grpc_error* grpc_metadata_batch_substitute(grpc_exec_ctx* exec_ctx,
-                                           grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_substitute(grpc_metadata_batch* batch,
                                            grpc_linked_mdelem* storage,
                                            grpc_mdelem new_mdelem) {
-  assert_valid_callouts(exec_ctx, batch);
+  assert_valid_callouts(batch);
   grpc_error* error = GRPC_ERROR_NONE;
   grpc_mdelem old_mdelem = storage->md;
   if (!grpc_slice_eq(GRPC_MDKEY(new_mdelem), GRPC_MDKEY(old_mdelem))) {
@@ -253,19 +244,18 @@ grpc_error* grpc_metadata_batch_substitute(grpc_exec_ctx* exec_ctx,
     error = maybe_link_callout(batch, storage);
     if (error != GRPC_ERROR_NONE) {
       unlink_storage(&batch->list, storage);
-      GRPC_MDELEM_UNREF(exec_ctx, storage->md);
+      GRPC_MDELEM_UNREF(storage->md);
     }
   } else {
     storage->md = new_mdelem;
   }
-  GRPC_MDELEM_UNREF(exec_ctx, old_mdelem);
-  assert_valid_callouts(exec_ctx, batch);
+  GRPC_MDELEM_UNREF(old_mdelem);
+  assert_valid_callouts(batch);
   return error;
 }
 
-void grpc_metadata_batch_clear(grpc_exec_ctx* exec_ctx,
-                               grpc_metadata_batch* batch) {
-  grpc_metadata_batch_destroy(exec_ctx, batch);
+void grpc_metadata_batch_clear(grpc_metadata_batch* batch) {
+  grpc_metadata_batch_destroy(batch);
   grpc_metadata_batch_init(batch);
 }
 
@@ -292,8 +282,7 @@ static void add_error(grpc_error** composite, grpc_error* error,
   *composite = grpc_error_add_child(*composite, error);
 }
 
-grpc_error* grpc_metadata_batch_filter(grpc_exec_ctx* exec_ctx,
-                                       grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_filter(grpc_metadata_batch* batch,
                                        grpc_metadata_batch_filter_func func,
                                        void* user_data,
                                        const char* composite_error_string) {
@@ -301,12 +290,12 @@ grpc_error* grpc_metadata_batch_filter(grpc_exec_ctx* exec_ctx,
   grpc_error* error = GRPC_ERROR_NONE;
   while (l) {
     grpc_linked_mdelem* next = l->next;
-    grpc_filtered_mdelem new_mdelem = func(exec_ctx, user_data, l->md);
+    grpc_filtered_mdelem new_mdelem = func(user_data, l->md);
     add_error(&error, new_mdelem.error, composite_error_string);
     if (GRPC_MDISNULL(new_mdelem.md)) {
-      grpc_metadata_batch_remove(exec_ctx, batch, l);
+      grpc_metadata_batch_remove(batch, l);
     } else if (new_mdelem.md.payload != l->md.payload) {
-      grpc_metadata_batch_substitute(exec_ctx, batch, l, new_mdelem.md);
+      grpc_metadata_batch_substitute(batch, l, new_mdelem.md);
     }
     l = next;
   }
diff --git a/src/core/lib/transport/metadata_batch.h b/src/core/lib/transport/metadata_batch.h
index adfb2d8069..8353a426f8 100644
--- a/src/core/lib/transport/metadata_batch.h
+++ b/src/core/lib/transport/metadata_batch.h
@@ -53,28 +53,23 @@ typedef struct grpc_metadata_batch {
 } grpc_metadata_batch;
 
 void grpc_metadata_batch_init(grpc_metadata_batch* batch);
-void grpc_metadata_batch_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_metadata_batch* batch);
-void grpc_metadata_batch_clear(grpc_exec_ctx* exec_ctx,
-                               grpc_metadata_batch* batch);
+void grpc_metadata_batch_destroy(grpc_metadata_batch* batch);
+void grpc_metadata_batch_clear(grpc_metadata_batch* batch);
 bool grpc_metadata_batch_is_empty(grpc_metadata_batch* batch);
 
 /* Returns the transport size of the batch. */
 size_t grpc_metadata_batch_size(grpc_metadata_batch* batch);
 
 /** Remove \a storage from the batch, unreffing the mdelem contained */
-void grpc_metadata_batch_remove(grpc_exec_ctx* exec_ctx,
-                                grpc_metadata_batch* batch,
+void grpc_metadata_batch_remove(grpc_metadata_batch* batch,
                                 grpc_linked_mdelem* storage);
 
 /** Substitute a new mdelem for an old value */
-grpc_error* grpc_metadata_batch_substitute(grpc_exec_ctx* exec_ctx,
-                                           grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_substitute(grpc_metadata_batch* batch,
                                            grpc_linked_mdelem* storage,
                                            grpc_mdelem new_value);
 
-void grpc_metadata_batch_set_value(grpc_exec_ctx* exec_ctx,
-                                   grpc_linked_mdelem* storage,
+void grpc_metadata_batch_set_value(grpc_linked_mdelem* storage,
                                    grpc_slice value);
 
 /** Add \a storage to the beginning of \a batch. storage->md is
@@ -82,17 +77,17 @@ void grpc_metadata_batch_set_value(grpc_exec_ctx* exec_ctx,
     \a storage is owned by the caller and must survive for the
     lifetime of batch. This usually means it should be around
     for the lifetime of the call. */
-grpc_error* grpc_metadata_batch_link_head(
-    grpc_exec_ctx* exec_ctx, grpc_metadata_batch* batch,
-    grpc_linked_mdelem* storage) GRPC_MUST_USE_RESULT;
+grpc_error* grpc_metadata_batch_link_head(grpc_metadata_batch* batch,
+                                          grpc_linked_mdelem* storage)
+    GRPC_MUST_USE_RESULT;
 /** Add \a storage to the end of \a batch. storage->md is
     assumed to be valid.
     \a storage is owned by the caller and must survive for the
     lifetime of batch. This usually means it should be around
     for the lifetime of the call. */
-grpc_error* grpc_metadata_batch_link_tail(
-    grpc_exec_ctx* exec_ctx, grpc_metadata_batch* batch,
-    grpc_linked_mdelem* storage) GRPC_MUST_USE_RESULT;
+grpc_error* grpc_metadata_batch_link_tail(grpc_metadata_batch* batch,
+                                          grpc_linked_mdelem* storage)
+    GRPC_MUST_USE_RESULT;
 
 /** Add \a elem_to_add as the first element in \a batch, using
     \a storage as backing storage for the linked list element.
@@ -101,8 +96,8 @@ grpc_error* grpc_metadata_batch_link_tail(
     for the lifetime of the call.
     Takes ownership of \a elem_to_add */
 grpc_error* grpc_metadata_batch_add_head(
-    grpc_exec_ctx* exec_ctx, grpc_metadata_batch* batch,
-    grpc_linked_mdelem* storage, grpc_mdelem elem_to_add) GRPC_MUST_USE_RESULT;
+    grpc_metadata_batch* batch, grpc_linked_mdelem* storage,
+    grpc_mdelem elem_to_add) GRPC_MUST_USE_RESULT;
 /** Add \a elem_to_add as the last element in \a batch, using
     \a storage as backing storage for the linked list element.
     \a storage is owned by the caller and must survive for the
@@ -110,8 +105,8 @@ grpc_error* grpc_metadata_batch_add_head(
     for the lifetime of the call.
     Takes ownership of \a elem_to_add */
 grpc_error* grpc_metadata_batch_add_tail(
-    grpc_exec_ctx* exec_ctx, grpc_metadata_batch* batch,
-    grpc_linked_mdelem* storage, grpc_mdelem elem_to_add) GRPC_MUST_USE_RESULT;
+    grpc_metadata_batch* batch, grpc_linked_mdelem* storage,
+    grpc_mdelem elem_to_add) GRPC_MUST_USE_RESULT;
 
 grpc_error* grpc_attach_md_to_error(grpc_error* src, grpc_mdelem md);
 
@@ -128,11 +123,10 @@ typedef struct {
   { GRPC_ERROR_NONE, GRPC_MDNULL }
 
 typedef grpc_filtered_mdelem (*grpc_metadata_batch_filter_func)(
-    grpc_exec_ctx* exec_ctx, void* user_data, grpc_mdelem elem);
+    void* user_data, grpc_mdelem elem);
 grpc_error* grpc_metadata_batch_filter(
-    grpc_exec_ctx* exec_ctx, grpc_metadata_batch* batch,
-    grpc_metadata_batch_filter_func func, void* user_data,
-    const char* composite_error_string) GRPC_MUST_USE_RESULT;
+    grpc_metadata_batch* batch, grpc_metadata_batch_filter_func func,
+    void* user_data, const char* composite_error_string) GRPC_MUST_USE_RESULT;
 
 #ifndef NDEBUG
 void grpc_metadata_batch_assert_ok(grpc_metadata_batch* comd);
diff --git a/src/core/lib/transport/service_config.cc b/src/core/lib/transport/service_config.cc
index adcec8c444..cbafc33840 100644
--- a/src/core/lib/transport/service_config.cc
+++ b/src/core/lib/transport/service_config.cc
@@ -152,10 +152,8 @@ static char* parse_json_method_name(grpc_json* json) {
 // each name found, incrementing \a idx for each entry added.
 // Returns false on error.
 static bool parse_json_method_config(
-    grpc_exec_ctx* exec_ctx, grpc_json* json,
-    void* (*create_value)(const grpc_json* method_config_json),
-    void* (*ref_value)(void* value),
-    void (*unref_value)(grpc_exec_ctx* exec_ctx, void* value),
+    grpc_json* json, void* (*create_value)(const grpc_json* method_config_json),
+    void* (*ref_value)(void* value), void (*unref_value)(void* value),
     grpc_slice_hash_table_entry* entries, size_t* idx) {
   // Construct value.
   void* method_config = create_value(json);
@@ -184,16 +182,15 @@ static bool parse_json_method_config(
   }
   success = true;
 done:
-  unref_value(exec_ctx, method_config);
+  unref_value(method_config);
   gpr_strvec_destroy(&paths);
   return success;
 }
 
 grpc_slice_hash_table* grpc_service_config_create_method_config_table(
-    grpc_exec_ctx* exec_ctx, const grpc_service_config* service_config,
+    const grpc_service_config* service_config,
     void* (*create_value)(const grpc_json* method_config_json),
-    void* (*ref_value)(void* value),
-    void (*unref_value)(grpc_exec_ctx* exec_ctx, void* value)) {
+    void* (*ref_value)(void* value), void (*unref_value)(void* value)) {
   const grpc_json* json = service_config->json_tree;
   // Traverse parsed JSON tree.
   if (json->type != GRPC_JSON_OBJECT || json->key != nullptr) return nullptr;
@@ -217,11 +214,11 @@ grpc_slice_hash_table* grpc_service_config_create_method_config_table(
       size_t idx = 0;
       for (grpc_json* method = field->child; method != nullptr;
            method = method->next) {
-        if (!parse_json_method_config(exec_ctx, method, create_value, ref_value,
+        if (!parse_json_method_config(method, create_value, ref_value,
                                       unref_value, entries, &idx)) {
           for (size_t i = 0; i < idx; ++i) {
-            grpc_slice_unref_internal(exec_ctx, entries[i].key);
-            unref_value(exec_ctx, entries[i].value);
+            grpc_slice_unref_internal(entries[i].key);
+            unref_value(entries[i].value);
           }
           gpr_free(entries);
           return nullptr;
@@ -240,8 +237,7 @@ grpc_slice_hash_table* grpc_service_config_create_method_config_table(
   return method_config_table;
 }
 
-void* grpc_method_config_table_get(grpc_exec_ctx* exec_ctx,
-                                   const grpc_slice_hash_table* table,
+void* grpc_method_config_table_get(const grpc_slice_hash_table* table,
                                    grpc_slice path) {
   void* value = grpc_slice_hash_table_get(table, path);
   // If we didn't find a match for the path, try looking for a wildcard
@@ -257,7 +253,7 @@ void* grpc_method_config_table_get(grpc_exec_ctx* exec_ctx,
     grpc_slice wildcard_path = grpc_slice_from_copied_string(buf);
     gpr_free(buf);
     value = grpc_slice_hash_table_get(table, wildcard_path);
-    grpc_slice_unref_internal(exec_ctx, wildcard_path);
+    grpc_slice_unref_internal(wildcard_path);
     gpr_free(path_str);
   }
   return value;
diff --git a/src/core/lib/transport/service_config.h b/src/core/lib/transport/service_config.h
index 75a290bfd8..98554b9f0f 100644
--- a/src/core/lib/transport/service_config.h
+++ b/src/core/lib/transport/service_config.h
@@ -45,10 +45,9 @@ const char* grpc_service_config_get_lb_policy_name(
 /// \a ref_value() and \a unref_value() are used to ref and unref values.
 /// Returns NULL on error.
 grpc_slice_hash_table* grpc_service_config_create_method_config_table(
-    grpc_exec_ctx* exec_ctx, const grpc_service_config* service_config,
+    const grpc_service_config* service_config,
     void* (*create_value)(const grpc_json* method_config_json),
-    void* (*ref_value)(void* value),
-    void (*unref_value)(grpc_exec_ctx* exec_ctx, void* value));
+    void* (*ref_value)(void* value), void (*unref_value)(void* value));
 
 /// A helper function for looking up values in the table returned by
 /// \a grpc_service_config_create_method_config_table().
@@ -56,8 +55,7 @@ grpc_slice_hash_table* grpc_service_config_create_method_config_table(
 /// the form "/service/method".
 /// Returns NULL if the method has no config.
 /// Caller does NOT own a reference to the result.
-void* grpc_method_config_table_get(grpc_exec_ctx* exec_ctx,
-                                   const grpc_slice_hash_table* table,
+void* grpc_method_config_table_get(const grpc_slice_hash_table* table,
                                    grpc_slice path);
 
 #endif /* GRPC_CORE_LIB_TRANSPORT_SERVICE_CONFIG_H */
diff --git a/src/core/lib/transport/static_metadata.cc b/src/core/lib/transport/static_metadata.cc
index 844724cbeb..2213b30f56 100644
--- a/src/core/lib/transport/static_metadata.cc
+++ b/src/core/lib/transport/static_metadata.cc
@@ -104,7 +104,7 @@ static uint8_t g_bytes[] = {
     101, 44,  103, 122, 105, 112};
 
 static void static_ref(void* unused) {}
-static void static_unref(grpc_exec_ctx* exec_ctx, void* unused) {}
+static void static_unref(void* unused) {}
 static const grpc_slice_refcount_vtable static_sub_vtable = {
     static_ref, static_unref, grpc_slice_default_eq_impl,
     grpc_slice_default_hash_impl};
diff --git a/src/core/lib/transport/status_conversion.cc b/src/core/lib/transport/status_conversion.cc
index a0a5f1ba4b..46cba4292b 100644
--- a/src/core/lib/transport/status_conversion.cc
+++ b/src/core/lib/transport/status_conversion.cc
@@ -37,8 +37,7 @@ grpc_http2_error_code grpc_status_to_http2_error(grpc_status_code status) {
   }
 }
 
-grpc_status_code grpc_http2_error_to_grpc_status(grpc_exec_ctx* exec_ctx,
-                                                 grpc_http2_error_code error,
+grpc_status_code grpc_http2_error_to_grpc_status(grpc_http2_error_code error,
                                                  grpc_millis deadline) {
   switch (error) {
     case GRPC_HTTP2_NO_ERROR:
@@ -47,7 +46,7 @@ grpc_status_code grpc_http2_error_to_grpc_status(grpc_exec_ctx* exec_ctx,
     case GRPC_HTTP2_CANCEL:
       /* http2 cancel translates to STATUS_CANCELLED iff deadline hasn't been
        * exceeded */
-      return grpc_exec_ctx_now(exec_ctx) > deadline
+      return grpc_core::ExecCtx::Get()->Now() > deadline
                  ? GRPC_STATUS_DEADLINE_EXCEEDED
                  : GRPC_STATUS_CANCELLED;
     case GRPC_HTTP2_ENHANCE_YOUR_CALM:
diff --git a/src/core/lib/transport/status_conversion.h b/src/core/lib/transport/status_conversion.h
index 3637b82801..107eb92a53 100644
--- a/src/core/lib/transport/status_conversion.h
+++ b/src/core/lib/transport/status_conversion.h
@@ -25,8 +25,7 @@
 
 /* Conversion of grpc status codes to http2 error codes (for RST_STREAM) */
 grpc_http2_error_code grpc_status_to_http2_error(grpc_status_code status);
-grpc_status_code grpc_http2_error_to_grpc_status(grpc_exec_ctx* exec_ctx,
-                                                 grpc_http2_error_code error,
+grpc_status_code grpc_http2_error_to_grpc_status(grpc_http2_error_code error,
                                                  grpc_millis deadline);
 
 /* Conversion of HTTP status codes (:status) to grpc status codes */
diff --git a/src/core/lib/transport/transport.cc b/src/core/lib/transport/transport.cc
index 5bda1541a6..08aee04ac9 100644
--- a/src/core/lib/transport/transport.cc
+++ b/src/core/lib/transport/transport.cc
@@ -49,8 +49,7 @@ void grpc_stream_ref(grpc_stream_refcount* refcount) {
 }
 
 #ifndef NDEBUG
-void grpc_stream_unref(grpc_exec_ctx* exec_ctx, grpc_stream_refcount* refcount,
-                       const char* reason) {
+void grpc_stream_unref(grpc_stream_refcount* refcount, const char* reason) {
   if (grpc_trace_stream_refcount.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&refcount->refs.count);
     gpr_log(GPR_DEBUG, "%s %p:%p UNREF %" PRIdPTR "->%" PRIdPTR " %s",
@@ -58,11 +57,11 @@ void grpc_stream_unref(grpc_exec_ctx* exec_ctx, grpc_stream_refcount* refcount,
             val - 1, reason);
   }
 #else
-void grpc_stream_unref(grpc_exec_ctx* exec_ctx,
-                       grpc_stream_refcount* refcount) {
+void grpc_stream_unref(grpc_stream_refcount* refcount) {
 #endif
   if (gpr_unref(&refcount->refs)) {
-    if (exec_ctx->flags & GRPC_EXEC_CTX_FLAG_THREAD_RESOURCE_LOOP) {
+    if (grpc_core::ExecCtx::Get()->flags() &
+        GRPC_EXEC_CTX_FLAG_THREAD_RESOURCE_LOOP) {
       /* Ick.
          The thread we're running on MAY be owned (indirectly) by a call-stack.
          If that's the case, destroying the call-stack MAY try to destroy the
@@ -73,7 +72,7 @@ void grpc_stream_unref(grpc_exec_ctx* exec_ctx,
       refcount->destroy.scheduler =
           grpc_executor_scheduler(GRPC_EXECUTOR_SHORT);
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, &refcount->destroy, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&refcount->destroy, GRPC_ERROR_NONE);
   }
 }
 
@@ -89,11 +88,11 @@ static void slice_stream_ref(void* p) {
 #endif
 }
 
-static void slice_stream_unref(grpc_exec_ctx* exec_ctx, void* p) {
+static void slice_stream_unref(void* p) {
 #ifndef NDEBUG
-  grpc_stream_unref(exec_ctx, STREAM_REF_FROM_SLICE_REF(p), "slice");
+  grpc_stream_unref(STREAM_REF_FROM_SLICE_REF(p), "slice");
 #else
-  grpc_stream_unref(exec_ctx, STREAM_REF_FROM_SLICE_REF(p));
+  grpc_stream_unref(STREAM_REF_FROM_SLICE_REF(p));
 #endif
 }
 
@@ -151,59 +150,50 @@ size_t grpc_transport_stream_size(grpc_transport* transport) {
   return transport->vtable->sizeof_stream;
 }
 
-void grpc_transport_destroy(grpc_exec_ctx* exec_ctx,
-                            grpc_transport* transport) {
-  transport->vtable->destroy(exec_ctx, transport);
+void grpc_transport_destroy(grpc_transport* transport) {
+  transport->vtable->destroy(transport);
 }
 
-int grpc_transport_init_stream(grpc_exec_ctx* exec_ctx,
-                               grpc_transport* transport, grpc_stream* stream,
+int grpc_transport_init_stream(grpc_transport* transport, grpc_stream* stream,
                                grpc_stream_refcount* refcount,
                                const void* server_data, gpr_arena* arena) {
-  return transport->vtable->init_stream(exec_ctx, transport, stream, refcount,
+  return transport->vtable->init_stream(transport, stream, refcount,
                                         server_data, arena);
 }
 
-void grpc_transport_perform_stream_op(grpc_exec_ctx* exec_ctx,
-                                      grpc_transport* transport,
+void grpc_transport_perform_stream_op(grpc_transport* transport,
                                       grpc_stream* stream,
                                       grpc_transport_stream_op_batch* op) {
-  transport->vtable->perform_stream_op(exec_ctx, transport, stream, op);
+  transport->vtable->perform_stream_op(transport, stream, op);
 }
 
-void grpc_transport_perform_op(grpc_exec_ctx* exec_ctx,
-                               grpc_transport* transport,
+void grpc_transport_perform_op(grpc_transport* transport,
                                grpc_transport_op* op) {
-  transport->vtable->perform_op(exec_ctx, transport, op);
+  transport->vtable->perform_op(transport, op);
 }
 
-void grpc_transport_set_pops(grpc_exec_ctx* exec_ctx, grpc_transport* transport,
-                             grpc_stream* stream,
+void grpc_transport_set_pops(grpc_transport* transport, grpc_stream* stream,
                              grpc_polling_entity* pollent) {
   grpc_pollset* pollset;
   grpc_pollset_set* pollset_set;
   if ((pollset = grpc_polling_entity_pollset(pollent)) != nullptr) {
-    transport->vtable->set_pollset(exec_ctx, transport, stream, pollset);
+    transport->vtable->set_pollset(transport, stream, pollset);
   } else if ((pollset_set = grpc_polling_entity_pollset_set(pollent)) !=
              nullptr) {
-    transport->vtable->set_pollset_set(exec_ctx, transport, stream,
-                                       pollset_set);
+    transport->vtable->set_pollset_set(transport, stream, pollset_set);
   } else {
     abort();
   }
 }
 
-void grpc_transport_destroy_stream(grpc_exec_ctx* exec_ctx,
-                                   grpc_transport* transport,
+void grpc_transport_destroy_stream(grpc_transport* transport,
                                    grpc_stream* stream,
                                    grpc_closure* then_schedule_closure) {
-  transport->vtable->destroy_stream(exec_ctx, transport, stream,
-                                    then_schedule_closure);
+  transport->vtable->destroy_stream(transport, stream, then_schedule_closure);
 }
 
-grpc_endpoint* grpc_transport_get_endpoint(grpc_exec_ctx* exec_ctx,
-                                           grpc_transport* transport) {
-  return transport->vtable->get_endpoint(exec_ctx, transport);
+grpc_endpoint* grpc_transport_get_endpoint(grpc_transport* transport) {
+  return transport->vtable->get_endpoint(transport);
 }
 
 // This comment should be sung to the tune of
@@ -214,25 +204,23 @@ grpc_endpoint* grpc_transport_get_endpoint(grpc_exec_ctx* exec_ctx,
 // though it lives in lib, it handles transport stream ops sure
 // it's grpc_transport_stream_op_batch_finish_with_failure
 void grpc_transport_stream_op_batch_finish_with_failure(
-    grpc_exec_ctx* exec_ctx, grpc_transport_stream_op_batch* batch,
-    grpc_error* error, grpc_call_combiner* call_combiner) {
+    grpc_transport_stream_op_batch* batch, grpc_error* error,
+    grpc_call_combiner* call_combiner) {
   if (batch->send_message) {
-    grpc_byte_stream_destroy(exec_ctx,
-                             batch->payload->send_message.send_message);
+    grpc_byte_stream_destroy(batch->payload->send_message.send_message);
   }
   if (batch->recv_message) {
-    GRPC_CALL_COMBINER_START(exec_ctx, call_combiner,
-                             batch->payload->recv_message.recv_message_ready,
-                             GRPC_ERROR_REF(error),
-                             "failing recv_message_ready");
+    GRPC_CALL_COMBINER_START(
+        call_combiner, batch->payload->recv_message.recv_message_ready,
+        GRPC_ERROR_REF(error), "failing recv_message_ready");
   }
   if (batch->recv_initial_metadata) {
     GRPC_CALL_COMBINER_START(
-        exec_ctx, call_combiner,
+        call_combiner,
         batch->payload->recv_initial_metadata.recv_initial_metadata_ready,
         GRPC_ERROR_REF(error), "failing recv_initial_metadata_ready");
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, batch->on_complete, error);
+  GRPC_CLOSURE_SCHED(batch->on_complete, error);
   if (batch->cancel_stream) {
     GRPC_ERROR_UNREF(batch->payload->cancel_stream.cancel_error);
   }
@@ -244,10 +232,9 @@ typedef struct {
   grpc_transport_op op;
 } made_transport_op;
 
-static void destroy_made_transport_op(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_error* error) {
+static void destroy_made_transport_op(void* arg, grpc_error* error) {
   made_transport_op* op = (made_transport_op*)arg;
-  GRPC_CLOSURE_SCHED(exec_ctx, op->inner_on_complete, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_SCHED(op->inner_on_complete, GRPC_ERROR_REF(error));
   gpr_free(op);
 }
 
@@ -268,12 +255,11 @@ typedef struct {
   grpc_transport_stream_op_batch_payload payload;
 } made_transport_stream_op;
 
-static void destroy_made_transport_stream_op(grpc_exec_ctx* exec_ctx, void* arg,
-                                             grpc_error* error) {
+static void destroy_made_transport_stream_op(void* arg, grpc_error* error) {
   made_transport_stream_op* op = (made_transport_stream_op*)arg;
   grpc_closure* c = op->inner_on_complete;
   gpr_free(op);
-  GRPC_CLOSURE_RUN(exec_ctx, c, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(c, GRPC_ERROR_REF(error));
 }
 
 grpc_transport_stream_op_batch* grpc_make_transport_stream_op(
diff --git a/src/core/lib/transport/transport.h b/src/core/lib/transport/transport.h
index b3cf04c22d..d813413a2a 100644
--- a/src/core/lib/transport/transport.h
+++ b/src/core/lib/transport/transport.h
@@ -55,15 +55,14 @@ void grpc_stream_ref_init(grpc_stream_refcount* refcount, int initial_refs,
                           grpc_iomgr_cb_func cb, void* cb_arg,
                           const char* object_type);
 void grpc_stream_ref(grpc_stream_refcount* refcount, const char* reason);
-void grpc_stream_unref(grpc_exec_ctx* exec_ctx, grpc_stream_refcount* refcount,
-                       const char* reason);
+void grpc_stream_unref(grpc_stream_refcount* refcount, const char* reason);
 #define GRPC_STREAM_REF_INIT(rc, ir, cb, cb_arg, objtype) \
   grpc_stream_ref_init(rc, ir, cb, cb_arg, objtype)
 #else
 void grpc_stream_ref_init(grpc_stream_refcount* refcount, int initial_refs,
                           grpc_iomgr_cb_func cb, void* cb_arg);
 void grpc_stream_ref(grpc_stream_refcount* refcount);
-void grpc_stream_unref(grpc_exec_ctx* exec_ctx, grpc_stream_refcount* refcount);
+void grpc_stream_unref(grpc_stream_refcount* refcount);
 #define GRPC_STREAM_REF_INIT(rc, ir, cb, cb_arg, objtype) \
   grpc_stream_ref_init(rc, ir, cb, cb_arg)
 #endif
@@ -237,16 +236,21 @@ typedef struct grpc_transport_op {
       If true, the callback is set to set_accept_stream_fn, with its
       user_data argument set to set_accept_stream_user_data */
   bool set_accept_stream;
-  void (*set_accept_stream_fn)(grpc_exec_ctx* exec_ctx, void* user_data,
-                               grpc_transport* transport,
+  void (*set_accept_stream_fn)(void* user_data, grpc_transport* transport,
                                const void* server_data);
   void* set_accept_stream_user_data;
   /** add this transport to a pollset */
   grpc_pollset* bind_pollset;
   /** add this transport to a pollset_set */
   grpc_pollset_set* bind_pollset_set;
-  /** send a ping, call this back if not NULL */
-  grpc_closure* send_ping;
+  /** send a ping, if either on_initiate or on_ack is not NULL */
+  struct {
+    /** Ping may be delayed by the transport, on_initiate callback will be
+        called when the ping is actually being sent. */
+    grpc_closure* on_initiate;
+    /** Called when the ping ack is received */
+    grpc_closure* on_ack;
+  } send_ping;
 
   /***************************************************************************
    * remaining fields are initialized and used at the discretion of the
@@ -269,13 +273,12 @@ size_t grpc_transport_stream_size(grpc_transport* transport);
      stream      - a pointer to uninitialized memory to initialize
      server_data - either NULL for a client initiated stream, or a pointer
                    supplied from the accept_stream callback function */
-int grpc_transport_init_stream(grpc_exec_ctx* exec_ctx,
-                               grpc_transport* transport, grpc_stream* stream,
+int grpc_transport_init_stream(grpc_transport* transport, grpc_stream* stream,
                                grpc_stream_refcount* refcount,
                                const void* server_data, gpr_arena* arena);
 
-void grpc_transport_set_pops(grpc_exec_ctx* exec_ctx, grpc_transport* transport,
-                             grpc_stream* stream, grpc_polling_entity* pollent);
+void grpc_transport_set_pops(grpc_transport* transport, grpc_stream* stream,
+                             grpc_polling_entity* pollent);
 
 /* Destroy transport data for a stream.
 
@@ -287,14 +290,13 @@ void grpc_transport_set_pops(grpc_exec_ctx* exec_ctx, grpc_transport* transport,
      transport - the transport on which to create this stream
      stream    - the grpc_stream to destroy (memory is still owned by the
                  caller, but any child memory must be cleaned up) */
-void grpc_transport_destroy_stream(grpc_exec_ctx* exec_ctx,
-                                   grpc_transport* transport,
+void grpc_transport_destroy_stream(grpc_transport* transport,
                                    grpc_stream* stream,
                                    grpc_closure* then_schedule_closure);
 
 void grpc_transport_stream_op_batch_finish_with_failure(
-    grpc_exec_ctx* exec_ctx, grpc_transport_stream_op_batch* op,
-    grpc_error* error, grpc_call_combiner* call_combiner);
+    grpc_transport_stream_op_batch* op, grpc_error* error,
+    grpc_call_combiner* call_combiner);
 
 char* grpc_transport_stream_op_batch_string(grpc_transport_stream_op_batch* op);
 char* grpc_transport_op_string(grpc_transport_op* op);
@@ -309,13 +311,11 @@ char* grpc_transport_op_string(grpc_transport_op* op);
                  non-NULL and previously initialized by the same transport.
      op        - a grpc_transport_stream_op_batch specifying the op to perform
    */
-void grpc_transport_perform_stream_op(grpc_exec_ctx* exec_ctx,
-                                      grpc_transport* transport,
+void grpc_transport_perform_stream_op(grpc_transport* transport,
                                       grpc_stream* stream,
                                       grpc_transport_stream_op_batch* op);
 
-void grpc_transport_perform_op(grpc_exec_ctx* exec_ctx,
-                               grpc_transport* transport,
+void grpc_transport_perform_op(grpc_transport* transport,
                                grpc_transport_op* op);
 
 /* Send a ping on a transport
@@ -328,11 +328,10 @@ void grpc_transport_goaway(grpc_transport* transport, grpc_status_code status,
                            grpc_slice debug_data);
 
 /* Destroy the transport */
-void grpc_transport_destroy(grpc_exec_ctx* exec_ctx, grpc_transport* transport);
+void grpc_transport_destroy(grpc_transport* transport);
 
 /* Get the endpoint used by \a transport */
-grpc_endpoint* grpc_transport_get_endpoint(grpc_exec_ctx* exec_ctx,
-                                           grpc_transport* transport);
+grpc_endpoint* grpc_transport_get_endpoint(grpc_transport* transport);
 
 /* Allocate a grpc_transport_op, and preconfigure the on_consumed closure to
    \a on_consumed and then delete the returned transport op */
diff --git a/src/core/lib/transport/transport_impl.h b/src/core/lib/transport/transport_impl.h
index 46be61427e..50b8a5f9b7 100644
--- a/src/core/lib/transport/transport_impl.h
+++ b/src/core/lib/transport/transport_impl.h
@@ -30,37 +30,34 @@ typedef struct grpc_transport_vtable {
   const char* name;
 
   /* implementation of grpc_transport_init_stream */
-  int (*init_stream)(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                     grpc_stream* stream, grpc_stream_refcount* refcount,
-                     const void* server_data, gpr_arena* arena);
+  int (*init_stream)(grpc_transport* self, grpc_stream* stream,
+                     grpc_stream_refcount* refcount, const void* server_data,
+                     gpr_arena* arena);
 
   /* implementation of grpc_transport_set_pollset */
-  void (*set_pollset)(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                      grpc_stream* stream, grpc_pollset* pollset);
+  void (*set_pollset)(grpc_transport* self, grpc_stream* stream,
+                      grpc_pollset* pollset);
 
   /* implementation of grpc_transport_set_pollset */
-  void (*set_pollset_set)(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                          grpc_stream* stream, grpc_pollset_set* pollset_set);
+  void (*set_pollset_set)(grpc_transport* self, grpc_stream* stream,
+                          grpc_pollset_set* pollset_set);
 
   /* implementation of grpc_transport_perform_stream_op */
-  void (*perform_stream_op)(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                            grpc_stream* stream,
+  void (*perform_stream_op)(grpc_transport* self, grpc_stream* stream,
                             grpc_transport_stream_op_batch* op);
 
   /* implementation of grpc_transport_perform_op */
-  void (*perform_op)(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                     grpc_transport_op* op);
+  void (*perform_op)(grpc_transport* self, grpc_transport_op* op);
 
   /* implementation of grpc_transport_destroy_stream */
-  void (*destroy_stream)(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                         grpc_stream* stream,
+  void (*destroy_stream)(grpc_transport* self, grpc_stream* stream,
                          grpc_closure* then_schedule_closure);
 
   /* implementation of grpc_transport_destroy */
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_transport* self);
+  void (*destroy)(grpc_transport* self);
 
   /* implementation of grpc_transport_get_endpoint */
-  grpc_endpoint* (*get_endpoint)(grpc_exec_ctx* exec_ctx, grpc_transport* self);
+  grpc_endpoint* (*get_endpoint)(grpc_transport* self);
 } grpc_transport_vtable;
 
 /* an instance of a grpc transport */
diff --git a/src/core/lib/transport/transport_op_string.cc b/src/core/lib/transport/transport_op_string.cc
index e69ab02570..c0f82fea0d 100644
--- a/src/core/lib/transport/transport_op_string.cc
+++ b/src/core/lib/transport/transport_op_string.cc
@@ -187,7 +187,7 @@ char* grpc_transport_op_string(grpc_transport_op* op) {
     gpr_strvec_add(&b, gpr_strdup("BIND_POLLSET_SET"));
   }
 
-  if (op->send_ping != nullptr) {
+  if (op->send_ping.on_initiate != nullptr || op->send_ping.on_ack != nullptr) {
     if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
     // first = false;
     gpr_strvec_add(&b, gpr_strdup("SEND_PING"));
diff --git a/src/core/tsi/fake_transport_security.cc b/src/core/tsi/fake_transport_security.cc
index f2f365fc0f..b907636f9d 100644
--- a/src/core/tsi/fake_transport_security.cc
+++ b/src/core/tsi/fake_transport_security.cc
@@ -399,8 +399,7 @@ static const tsi_frame_protector_vtable frame_protector_vtable = {
 /* --- tsi_zero_copy_grpc_protector methods implementation. ---*/
 
 static tsi_result fake_zero_copy_grpc_protector_protect(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self,
-    grpc_slice_buffer* unprotected_slices,
+    tsi_zero_copy_grpc_protector* self, grpc_slice_buffer* unprotected_slices,
     grpc_slice_buffer* protected_slices) {
   if (self == nullptr || unprotected_slices == nullptr ||
       protected_slices == nullptr) {
@@ -424,8 +423,7 @@ static tsi_result fake_zero_copy_grpc_protector_protect(
 }
 
 static tsi_result fake_zero_copy_grpc_protector_unprotect(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self,
-    grpc_slice_buffer* protected_slices,
+    tsi_zero_copy_grpc_protector* self, grpc_slice_buffer* protected_slices,
     grpc_slice_buffer* unprotected_slices) {
   if (self == nullptr || unprotected_slices == nullptr ||
       protected_slices == nullptr) {
@@ -454,18 +452,18 @@ static tsi_result fake_zero_copy_grpc_protector_unprotect(
         impl->parsed_frame_size - TSI_FAKE_FRAME_HEADER_SIZE,
         unprotected_slices);
     impl->parsed_frame_size = 0;
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &impl->header_sb);
+    grpc_slice_buffer_reset_and_unref_internal(&impl->header_sb);
   }
   return TSI_OK;
 }
 
 static void fake_zero_copy_grpc_protector_destroy(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self) {
+    tsi_zero_copy_grpc_protector* self) {
   if (self == nullptr) return;
   tsi_fake_zero_copy_grpc_protector* impl =
       (tsi_fake_zero_copy_grpc_protector*)self;
-  grpc_slice_buffer_destroy_internal(exec_ctx, &impl->header_sb);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &impl->protected_sb);
+  grpc_slice_buffer_destroy_internal(&impl->header_sb);
+  grpc_slice_buffer_destroy_internal(&impl->protected_sb);
   gpr_free(impl);
 }
 
@@ -497,8 +495,7 @@ static tsi_result fake_handshaker_result_extract_peer(
 }
 
 static tsi_result fake_handshaker_result_create_zero_copy_grpc_protector(
-    void* exec_ctx, const tsi_handshaker_result* self,
-    size_t* max_output_protected_frame_size,
+    const tsi_handshaker_result* self, size_t* max_output_protected_frame_size,
     tsi_zero_copy_grpc_protector** protector) {
   *protector =
       tsi_create_fake_zero_copy_grpc_protector(max_output_protected_frame_size);
diff --git a/src/core/tsi/transport_security.h b/src/core/tsi/transport_security.h
index bf3a776b11..ed662d48af 100644
--- a/src/core/tsi/transport_security.h
+++ b/src/core/tsi/transport_security.h
@@ -90,7 +90,7 @@ struct tsi_handshaker {
 typedef struct {
   tsi_result (*extract_peer)(const tsi_handshaker_result* self, tsi_peer* peer);
   tsi_result (*create_zero_copy_grpc_protector)(
-      void* exec_ctx, const tsi_handshaker_result* self,
+      const tsi_handshaker_result* self,
       size_t* max_output_protected_frame_size,
       tsi_zero_copy_grpc_protector** protector);
   tsi_result (*create_frame_protector)(const tsi_handshaker_result* self,
diff --git a/src/core/tsi/transport_security_grpc.cc b/src/core/tsi/transport_security_grpc.cc
index 875d367218..76f7ae782f 100644
--- a/src/core/tsi/transport_security_grpc.cc
+++ b/src/core/tsi/transport_security_grpc.cc
@@ -20,18 +20,16 @@
 
 /* This method creates a tsi_zero_copy_grpc_protector object.  */
 tsi_result tsi_handshaker_result_create_zero_copy_grpc_protector(
-    grpc_exec_ctx* exec_ctx, const tsi_handshaker_result* self,
-    size_t* max_output_protected_frame_size,
+    const tsi_handshaker_result* self, size_t* max_output_protected_frame_size,
     tsi_zero_copy_grpc_protector** protector) {
-  if (exec_ctx == nullptr || self == nullptr || self->vtable == nullptr ||
-      protector == nullptr) {
+  if (self == nullptr || self->vtable == nullptr || protector == nullptr) {
     return TSI_INVALID_ARGUMENT;
   }
   if (self->vtable->create_zero_copy_grpc_protector == nullptr) {
     return TSI_UNIMPLEMENTED;
   }
   return self->vtable->create_zero_copy_grpc_protector(
-      exec_ctx, self, max_output_protected_frame_size, protector);
+      self, max_output_protected_frame_size, protector);
 }
 
 /* --- tsi_zero_copy_grpc_protector common implementation. ---
@@ -39,33 +37,28 @@ tsi_result tsi_handshaker_result_create_zero_copy_grpc_protector(
    Calls specific implementation after state/input validation. */
 
 tsi_result tsi_zero_copy_grpc_protector_protect(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self,
-    grpc_slice_buffer* unprotected_slices,
+    tsi_zero_copy_grpc_protector* self, grpc_slice_buffer* unprotected_slices,
     grpc_slice_buffer* protected_slices) {
-  if (exec_ctx == nullptr || self == nullptr || self->vtable == nullptr ||
+  if (self == nullptr || self->vtable == nullptr ||
       unprotected_slices == nullptr || protected_slices == nullptr) {
     return TSI_INVALID_ARGUMENT;
   }
   if (self->vtable->protect == nullptr) return TSI_UNIMPLEMENTED;
-  return self->vtable->protect(exec_ctx, self, unprotected_slices,
-                               protected_slices);
+  return self->vtable->protect(self, unprotected_slices, protected_slices);
 }
 
 tsi_result tsi_zero_copy_grpc_protector_unprotect(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self,
-    grpc_slice_buffer* protected_slices,
+    tsi_zero_copy_grpc_protector* self, grpc_slice_buffer* protected_slices,
     grpc_slice_buffer* unprotected_slices) {
-  if (exec_ctx == nullptr || self == nullptr || self->vtable == nullptr ||
+  if (self == nullptr || self->vtable == nullptr ||
       protected_slices == nullptr || unprotected_slices == nullptr) {
     return TSI_INVALID_ARGUMENT;
   }
   if (self->vtable->unprotect == nullptr) return TSI_UNIMPLEMENTED;
-  return self->vtable->unprotect(exec_ctx, self, protected_slices,
-                                 unprotected_slices);
+  return self->vtable->unprotect(self, protected_slices, unprotected_slices);
 }
 
-void tsi_zero_copy_grpc_protector_destroy(grpc_exec_ctx* exec_ctx,
-                                          tsi_zero_copy_grpc_protector* self) {
+void tsi_zero_copy_grpc_protector_destroy(tsi_zero_copy_grpc_protector* self) {
   if (self == nullptr) return;
-  self->vtable->destroy(exec_ctx, self);
+  self->vtable->destroy(self);
 }
diff --git a/src/core/tsi/transport_security_grpc.h b/src/core/tsi/transport_security_grpc.h
index 9fccfd79dd..0156ff1c68 100644
--- a/src/core/tsi/transport_security_grpc.h
+++ b/src/core/tsi/transport_security_grpc.h
@@ -26,8 +26,7 @@
    assuming there is no fatal error.
    The caller is responsible for destroying the protector.  */
 tsi_result tsi_handshaker_result_create_zero_copy_grpc_protector(
-    grpc_exec_ctx* exec_ctx, const tsi_handshaker_result* self,
-    size_t* max_output_protected_frame_size,
+    const tsi_handshaker_result* self, size_t* max_output_protected_frame_size,
     tsi_zero_copy_grpc_protector** protector);
 
 /* -- tsi_zero_copy_grpc_protector object --  */
@@ -39,8 +38,8 @@ tsi_result tsi_handshaker_result_create_zero_copy_grpc_protector(
    - This method returns TSI_OK in case of success or a specific error code in
      case of failure.  */
 tsi_result tsi_zero_copy_grpc_protector_protect(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self,
-    grpc_slice_buffer* unprotected_slices, grpc_slice_buffer* protected_slices);
+    tsi_zero_copy_grpc_protector* self, grpc_slice_buffer* unprotected_slices,
+    grpc_slice_buffer* protected_slices);
 
 /* Outputs unprotected bytes.
    - protected_slices is the bytes of protected frames.
@@ -49,24 +48,21 @@ tsi_result tsi_zero_copy_grpc_protector_protect(
      there is not enough data to output in which case unprotected_slices has 0
      bytes.  */
 tsi_result tsi_zero_copy_grpc_protector_unprotect(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self,
-    grpc_slice_buffer* protected_slices, grpc_slice_buffer* unprotected_slices);
+    tsi_zero_copy_grpc_protector* self, grpc_slice_buffer* protected_slices,
+    grpc_slice_buffer* unprotected_slices);
 
 /* Destroys the tsi_zero_copy_grpc_protector object.  */
-void tsi_zero_copy_grpc_protector_destroy(grpc_exec_ctx* exec_ctx,
-                                          tsi_zero_copy_grpc_protector* self);
+void tsi_zero_copy_grpc_protector_destroy(tsi_zero_copy_grpc_protector* self);
 
 /* Base for tsi_zero_copy_grpc_protector implementations.  */
 typedef struct {
-  tsi_result (*protect)(grpc_exec_ctx* exec_ctx,
-                        tsi_zero_copy_grpc_protector* self,
+  tsi_result (*protect)(tsi_zero_copy_grpc_protector* self,
                         grpc_slice_buffer* unprotected_slices,
                         grpc_slice_buffer* protected_slices);
-  tsi_result (*unprotect)(grpc_exec_ctx* exec_ctx,
-                          tsi_zero_copy_grpc_protector* self,
+  tsi_result (*unprotect)(tsi_zero_copy_grpc_protector* self,
                           grpc_slice_buffer* protected_slices,
                           grpc_slice_buffer* unprotected_slices);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self);
+  void (*destroy)(tsi_zero_copy_grpc_protector* self);
 } tsi_zero_copy_grpc_protector_vtable;
 
 struct tsi_zero_copy_grpc_protector {
diff --git a/src/cpp/common/channel_arguments.cc b/src/cpp/common/channel_arguments.cc
index cae9ef953a..b696774243 100644
--- a/src/cpp/common/channel_arguments.cc
+++ b/src/cpp/common/channel_arguments.cc
@@ -66,13 +66,12 @@ ChannelArguments::ChannelArguments(const ChannelArguments& other)
 }
 
 ChannelArguments::~ChannelArguments() {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   for (auto it = args_.begin(); it != args_.end(); ++it) {
     if (it->type == GRPC_ARG_POINTER) {
-      it->value.pointer.vtable->destroy(&exec_ctx, it->value.pointer.p);
+      it->value.pointer.vtable->destroy(it->value.pointer.p);
     }
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void ChannelArguments::Swap(ChannelArguments& other) {
@@ -95,17 +94,17 @@ void ChannelArguments::SetSocketMutator(grpc_socket_mutator* mutator) {
   }
   grpc_arg mutator_arg = grpc_socket_mutator_to_arg(mutator);
   bool replaced = false;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   for (auto it = args_.begin(); it != args_.end(); ++it) {
     if (it->type == mutator_arg.type &&
         grpc::string(it->key) == grpc::string(mutator_arg.key)) {
       GPR_ASSERT(!replaced);
-      it->value.pointer.vtable->destroy(&exec_ctx, it->value.pointer.p);
+      it->value.pointer.vtable->destroy(it->value.pointer.p);
       it->value.pointer = mutator_arg.value.pointer;
       replaced = true;
     }
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   if (!replaced) {
     args_.push_back(mutator_arg);
   }
diff --git a/src/cpp/common/channel_filter.cc b/src/cpp/common/channel_filter.cc
index 274079f8dd..cbe2a209f5 100644
--- a/src/cpp/common/channel_filter.cc
+++ b/src/cpp/common/channel_filter.cc
@@ -27,43 +27,39 @@ namespace grpc {
 
 // MetadataBatch
 
-grpc_linked_mdelem* MetadataBatch::AddMetadata(grpc_exec_ctx* exec_ctx,
-                                               const string& key,
+grpc_linked_mdelem* MetadataBatch::AddMetadata(const string& key,
                                                const string& value) {
   grpc_linked_mdelem* storage = new grpc_linked_mdelem;
   memset(storage, 0, sizeof(grpc_linked_mdelem));
-  storage->md = grpc_mdelem_from_slices(exec_ctx, SliceFromCopiedString(key),
+  storage->md = grpc_mdelem_from_slices(SliceFromCopiedString(key),
                                         SliceFromCopiedString(value));
   GRPC_LOG_IF_ERROR("MetadataBatch::AddMetadata",
-                    grpc_metadata_batch_link_head(exec_ctx, batch_, storage));
+                    grpc_metadata_batch_link_head(batch_, storage));
   return storage;
 }
 
 // ChannelData
 
-void ChannelData::StartTransportOp(grpc_exec_ctx* exec_ctx,
-                                   grpc_channel_element* elem,
+void ChannelData::StartTransportOp(grpc_channel_element* elem,
                                    TransportOp* op) {
-  grpc_channel_next_op(exec_ctx, elem, op->op());
+  grpc_channel_next_op(elem, op->op());
 }
 
-void ChannelData::GetInfo(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+void ChannelData::GetInfo(grpc_channel_element* elem,
                           const grpc_channel_info* channel_info) {
-  grpc_channel_next_get_info(exec_ctx, elem, channel_info);
+  grpc_channel_next_get_info(elem, channel_info);
 }
 
 // CallData
 
-void CallData::StartTransportStreamOpBatch(grpc_exec_ctx* exec_ctx,
-                                           grpc_call_element* elem,
+void CallData::StartTransportStreamOpBatch(grpc_call_element* elem,
                                            TransportStreamOpBatch* op) {
-  grpc_call_next_op(exec_ctx, elem, op->op());
+  grpc_call_next_op(elem, op->op());
 }
 
-void CallData::SetPollsetOrPollsetSet(grpc_exec_ctx* exec_ctx,
-                                      grpc_call_element* elem,
+void CallData::SetPollsetOrPollsetSet(grpc_call_element* elem,
                                       grpc_polling_entity* pollent) {
-  grpc_call_stack_ignore_set_pollset_or_pollset_set(exec_ctx, elem, pollent);
+  grpc_call_stack_ignore_set_pollset_or_pollset_set(elem, pollent);
 }
 
 // internal code used by RegisterChannelFilter()
@@ -75,8 +71,7 @@ std::vector<FilterRecord>* channel_filters;
 
 namespace {
 
-bool MaybeAddFilter(grpc_exec_ctx* exec_ctx,
-                    grpc_channel_stack_builder* builder, void* arg) {
+bool MaybeAddFilter(grpc_channel_stack_builder* builder, void* arg) {
   const FilterRecord& filter = *(FilterRecord*)arg;
   if (filter.include_filter) {
     const grpc_channel_args* args =
diff --git a/src/cpp/common/channel_filter.h b/src/cpp/common/channel_filter.h
index 9fe9cf0aea..a1f42c0b32 100644
--- a/src/cpp/common/channel_filter.h
+++ b/src/cpp/common/channel_filter.h
@@ -54,8 +54,7 @@ class MetadataBatch {
   /// Adds metadata and returns the newly allocated storage.
   /// The caller takes ownership of the result, which must exist for the
   /// lifetime of the gRPC call.
-  grpc_linked_mdelem* AddMetadata(grpc_exec_ctx* exec_ctx, const string& key,
-                                  const string& value);
+  grpc_linked_mdelem* AddMetadata(const string& key, const string& value);
 
   class const_iterator : public std::iterator<std::bidirectional_iterator_tag,
                                               const grpc_mdelem> {
@@ -222,18 +221,17 @@ class ChannelData {
   // TODO(roth): Come up with a more C++-like API for the channel element.
 
   /// Initializes the channel data.
-  virtual grpc_error* Init(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+  virtual grpc_error* Init(grpc_channel_element* elem,
                            grpc_channel_element_args* args) {
     return GRPC_ERROR_NONE;
   }
 
   // Called before destruction.
-  virtual void Destroy(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem) {}
+  virtual void Destroy(grpc_channel_element* elem) {}
 
-  virtual void StartTransportOp(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_element* elem, TransportOp* op);
+  virtual void StartTransportOp(grpc_channel_element* elem, TransportOp* op);
 
-  virtual void GetInfo(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+  virtual void GetInfo(grpc_channel_element* elem,
                        const grpc_channel_info* channel_info);
 };
 
@@ -246,24 +244,22 @@ class CallData {
   // TODO(roth): Come up with a more C++-like API for the call element.
 
   /// Initializes the call data.
-  virtual grpc_error* Init(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+  virtual grpc_error* Init(grpc_call_element* elem,
                            const grpc_call_element_args* args) {
     return GRPC_ERROR_NONE;
   }
 
   // Called before destruction.
-  virtual void Destroy(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+  virtual void Destroy(grpc_call_element* elem,
                        const grpc_call_final_info* final_info,
                        grpc_closure* then_call_closure) {}
 
   /// Starts a new stream operation.
-  virtual void StartTransportStreamOpBatch(grpc_exec_ctx* exec_ctx,
-                                           grpc_call_element* elem,
+  virtual void StartTransportStreamOpBatch(grpc_call_element* elem,
                                            TransportStreamOpBatch* op);
 
   /// Sets a pollset or pollset set.
-  virtual void SetPollsetOrPollsetSet(grpc_exec_ctx* exec_ctx,
-                                      grpc_call_element* elem,
+  virtual void SetPollsetOrPollsetSet(grpc_call_element* elem,
                                       grpc_polling_entity* pollent);
 };
 
@@ -277,71 +273,63 @@ class ChannelFilter final {
  public:
   static const size_t channel_data_size = sizeof(ChannelDataType);
 
-  static grpc_error* InitChannelElement(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_element* elem,
+  static grpc_error* InitChannelElement(grpc_channel_element* elem,
                                         grpc_channel_element_args* args) {
     // Construct the object in the already-allocated memory.
     ChannelDataType* channel_data = new (elem->channel_data) ChannelDataType();
-    return channel_data->Init(exec_ctx, elem, args);
+    return channel_data->Init(elem, args);
   }
 
-  static void DestroyChannelElement(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_element* elem) {
+  static void DestroyChannelElement(grpc_channel_element* elem) {
     ChannelDataType* channel_data =
         reinterpret_cast<ChannelDataType*>(elem->channel_data);
-    channel_data->Destroy(exec_ctx, elem);
+    channel_data->Destroy(elem);
     channel_data->~ChannelDataType();
   }
 
-  static void StartTransportOp(grpc_exec_ctx* exec_ctx,
-                               grpc_channel_element* elem,
+  static void StartTransportOp(grpc_channel_element* elem,
                                grpc_transport_op* op) {
     ChannelDataType* channel_data =
         reinterpret_cast<ChannelDataType*>(elem->channel_data);
     TransportOp op_wrapper(op);
-    channel_data->StartTransportOp(exec_ctx, elem, &op_wrapper);
+    channel_data->StartTransportOp(elem, &op_wrapper);
   }
 
-  static void GetChannelInfo(grpc_exec_ctx* exec_ctx,
-                             grpc_channel_element* elem,
+  static void GetChannelInfo(grpc_channel_element* elem,
                              const grpc_channel_info* channel_info) {
     ChannelDataType* channel_data =
         reinterpret_cast<ChannelDataType*>(elem->channel_data);
-    channel_data->GetInfo(exec_ctx, elem, channel_info);
+    channel_data->GetInfo(elem, channel_info);
   }
 
   static const size_t call_data_size = sizeof(CallDataType);
 
-  static grpc_error* InitCallElement(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_element* elem,
+  static grpc_error* InitCallElement(grpc_call_element* elem,
                                      const grpc_call_element_args* args) {
     // Construct the object in the already-allocated memory.
     CallDataType* call_data = new (elem->call_data) CallDataType();
-    return call_data->Init(exec_ctx, elem, args);
+    return call_data->Init(elem, args);
   }
 
-  static void DestroyCallElement(grpc_exec_ctx* exec_ctx,
-                                 grpc_call_element* elem,
+  static void DestroyCallElement(grpc_call_element* elem,
                                  const grpc_call_final_info* final_info,
                                  grpc_closure* then_call_closure) {
     CallDataType* call_data = reinterpret_cast<CallDataType*>(elem->call_data);
-    call_data->Destroy(exec_ctx, elem, final_info, then_call_closure);
+    call_data->Destroy(elem, final_info, then_call_closure);
     call_data->~CallDataType();
   }
 
-  static void StartTransportStreamOpBatch(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_element* elem,
+  static void StartTransportStreamOpBatch(grpc_call_element* elem,
                                           grpc_transport_stream_op_batch* op) {
     CallDataType* call_data = reinterpret_cast<CallDataType*>(elem->call_data);
     TransportStreamOpBatch op_wrapper(op);
-    call_data->StartTransportStreamOpBatch(exec_ctx, elem, &op_wrapper);
+    call_data->StartTransportStreamOpBatch(elem, &op_wrapper);
   }
 
-  static void SetPollsetOrPollsetSet(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_element* elem,
+  static void SetPollsetOrPollsetSet(grpc_call_element* elem,
                                      grpc_polling_entity* pollent) {
     CallDataType* call_data = reinterpret_cast<CallDataType*>(elem->call_data);
-    call_data->SetPollsetOrPollsetSet(exec_ctx, elem, pollent);
+    call_data->SetPollsetOrPollsetSet(elem, pollent);
   }
 };
 
diff --git a/src/csharp/Grpc.Core.Tests/ChannelConnectivityTest.cs b/src/csharp/Grpc.Core.Tests/ChannelConnectivityTest.cs
new file mode 100644
index 0000000000..a43040f01a
--- /dev/null
+++ b/src/csharp/Grpc.Core.Tests/ChannelConnectivityTest.cs
@@ -0,0 +1,86 @@
+#region Copyright notice and license
+
+// Copyright 2017 gRPC authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Internal;
+using Grpc.Core.Profiling;
+using Grpc.Core.Utils;
+using NUnit.Framework;
+
+namespace Grpc.Core.Tests
+{
+    public class ChannelConnectivityTest
+    {
+        const string Host = "127.0.0.1";
+
+        MockServiceHelper helper;
+        Server server;
+        Channel channel;
+
+        [SetUp]
+        public void Init()
+        {
+            helper = new MockServiceHelper(Host);
+            server = helper.GetServer();
+            server.Start();
+            channel = helper.GetChannel();
+        }
+
+        [TearDown]
+        public void Cleanup()
+        {
+            channel.ShutdownAsync().Wait();
+            server.ShutdownAsync().Wait();
+        }
+
+        [Test]
+        public async Task Channel_WaitForStateChangedAsync()
+        {
+            helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) =>
+            {
+                return Task.FromResult(request);
+            });
+
+            Assert.ThrowsAsync(typeof(TaskCanceledException), 
+                async () => await channel.WaitForStateChangedAsync(channel.State, DateTime.UtcNow.AddMilliseconds(10)));
+
+            var stateChangedTask = channel.WaitForStateChangedAsync(channel.State);
+
+            await Calls.AsyncUnaryCall(helper.CreateUnaryCall(), "abc");
+
+            await stateChangedTask;
+            Assert.AreEqual(ChannelState.Ready, channel.State);
+        }
+
+        [Test]
+        public async Task Channel_ConnectAsync()
+        {
+            await channel.ConnectAsync();
+            Assert.AreEqual(ChannelState.Ready, channel.State);
+
+            await channel.ConnectAsync(DateTime.UtcNow.AddMilliseconds(1000));
+            Assert.AreEqual(ChannelState.Ready, channel.State);
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core.Tests/ClientServerTest.cs b/src/csharp/Grpc.Core.Tests/ClientServerTest.cs
index 90dd365b07..331c3321e1 100644
--- a/src/csharp/Grpc.Core.Tests/ClientServerTest.cs
+++ b/src/csharp/Grpc.Core.Tests/ClientServerTest.cs
@@ -373,34 +373,5 @@ namespace Grpc.Core.Tests
             });
             Assert.AreEqual("PASS", Calls.BlockingUnaryCall(helper.CreateUnaryCall(), "abc"));
         }
-
-        [Test]
-        public async Task Channel_WaitForStateChangedAsync()
-        {
-            helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) =>
-            {
-                return Task.FromResult(request);
-            });
-
-            Assert.ThrowsAsync(typeof(TaskCanceledException), 
-                async () => await channel.WaitForStateChangedAsync(channel.State, DateTime.UtcNow.AddMilliseconds(10)));
-
-            var stateChangedTask = channel.WaitForStateChangedAsync(channel.State);
-
-            await Calls.AsyncUnaryCall(helper.CreateUnaryCall(), "abc");
-
-            await stateChangedTask;
-            Assert.AreEqual(ChannelState.Ready, channel.State);
-        }
-
-        [Test]
-        public async Task Channel_ConnectAsync()
-        {
-            await channel.ConnectAsync();
-            Assert.AreEqual(ChannelState.Ready, channel.State);
-
-            await channel.ConnectAsync(DateTime.UtcNow.AddMilliseconds(1000));
-            Assert.AreEqual(ChannelState.Ready, channel.State);
-        }
     }
 }
diff --git a/src/csharp/Grpc.Core.Tests/Internal/CompletionQueueSafeHandleTest.cs b/src/csharp/Grpc.Core.Tests/Internal/CompletionQueueSafeHandleTest.cs
index 775c950c8c..7e4e2975c1 100644
--- a/src/csharp/Grpc.Core.Tests/Internal/CompletionQueueSafeHandleTest.cs
+++ b/src/csharp/Grpc.Core.Tests/Internal/CompletionQueueSafeHandleTest.cs
@@ -40,7 +40,7 @@ namespace Grpc.Core.Internal.Tests
         public void CreateAsyncAndShutdown()
         {
             var env = GrpcEnvironment.AddRef();
-            var cq = CompletionQueueSafeHandle.CreateAsync(new CompletionRegistry(env, () => BatchContextSafeHandle.Create()));
+            var cq = CompletionQueueSafeHandle.CreateAsync(new CompletionRegistry(env, () => BatchContextSafeHandle.Create(), () => RequestCallContextSafeHandle.Create()));
             cq.Shutdown();
             var ev = cq.Next();
             cq.Dispose();
diff --git a/src/csharp/Grpc.Core/Channel.cs b/src/csharp/Grpc.Core/Channel.cs
index f9925a8a76..e39da9c1c2 100644
--- a/src/csharp/Grpc.Core/Channel.cs
+++ b/src/csharp/Grpc.Core/Channel.cs
@@ -152,8 +152,11 @@ namespace Grpc.Core
                 "Shutdown is a terminal state. No further state changes can occur.");
             var tcs = new TaskCompletionSource<object>();
             var deadlineTimespec = deadline.HasValue ? Timespec.FromDateTime(deadline.Value) : Timespec.InfFuture;
-            // pass "tcs" as "state" for WatchConnectivityStateHandler.
-            handle.WatchConnectivityState(lastObservedState, deadlineTimespec, completionQueue, WatchConnectivityStateHandler, tcs);
+            lock (myLock)
+            {
+                // pass "tcs" as "state" for WatchConnectivityStateHandler.
+                handle.WatchConnectivityState(lastObservedState, deadlineTimespec, completionQueue, WatchConnectivityStateHandler, tcs);
+            }
             return tcs.Task;
         }
 
@@ -236,7 +239,10 @@ namespace Grpc.Core
                 Logger.Warning("Channel shutdown was called but there are still {0} active calls for that channel.", activeCallCount);
             }
 
-            handle.Dispose();
+            lock (myLock)
+            {
+                handle.Dispose();
+            }
 
             await Task.WhenAll(GrpcEnvironment.ReleaseAsync(), connectivityWatcherTask).ConfigureAwait(false);
         }
@@ -285,7 +291,10 @@ namespace Grpc.Core
         {
             try
             {
-                return handle.CheckConnectivityState(tryToConnect);
+                lock (myLock)
+                {
+                    return handle.CheckConnectivityState(tryToConnect);
+                }
             }
             catch (ObjectDisposedException)
             {
diff --git a/src/csharp/Grpc.Core/GrpcEnvironment.cs b/src/csharp/Grpc.Core/GrpcEnvironment.cs
index 2b1b5e32d7..7b4342b74b 100644
--- a/src/csharp/Grpc.Core/GrpcEnvironment.cs
+++ b/src/csharp/Grpc.Core/GrpcEnvironment.cs
@@ -35,6 +35,8 @@ namespace Grpc.Core
         const int MinDefaultThreadPoolSize = 4;
         const int DefaultBatchContextPoolSharedCapacity = 10000;
         const int DefaultBatchContextPoolThreadLocalCapacity = 64;
+        const int DefaultRequestCallContextPoolSharedCapacity = 10000;
+        const int DefaultRequestCallContextPoolThreadLocalCapacity = 64;
 
         static object staticLock = new object();
         static GrpcEnvironment instance;
@@ -44,12 +46,15 @@ namespace Grpc.Core
         static bool inlineHandlers;
         static int batchContextPoolSharedCapacity = DefaultBatchContextPoolSharedCapacity;
         static int batchContextPoolThreadLocalCapacity = DefaultBatchContextPoolThreadLocalCapacity;
+        static int requestCallContextPoolSharedCapacity = DefaultRequestCallContextPoolSharedCapacity;
+        static int requestCallContextPoolThreadLocalCapacity = DefaultRequestCallContextPoolThreadLocalCapacity;
         static readonly HashSet<Channel> registeredChannels = new HashSet<Channel>();
         static readonly HashSet<Server> registeredServers = new HashSet<Server>();
 
         static ILogger logger = new LogLevelFilterLogger(new ConsoleLogger(), LogLevel.Off, true);
 
         readonly IObjectPool<BatchContextSafeHandle> batchContextPool;
+        readonly IObjectPool<RequestCallContextSafeHandle> requestCallContextPool;
         readonly GrpcThreadPool threadPool;
         readonly DebugStats debugStats = new DebugStats();
         readonly AtomicCounter cqPickerCounter = new AtomicCounter();
@@ -263,6 +268,26 @@ namespace Grpc.Core
         }
 
         /// <summary>
+        /// Sets the parameters for a pool that caches request call context instances. Reusing request call context instances
+        /// instead of creating a new one for every requested call in C core helps reducing the GC pressure.
+        /// Can be only invoked before the <c>GrpcEnviroment</c> is started and cannot be changed afterwards.
+        /// This is an advanced setting and you should only use it if you know what you are doing.
+        /// Most users should rely on the default value provided by gRPC library.
+        /// Note: this method is part of an experimental API that can change or be removed without any prior notice.
+        /// </summary>
+        public static void SetRequestCallContextPoolParams(int sharedCapacity, int threadLocalCapacity)
+        {
+            lock (staticLock)
+            {
+                GrpcPreconditions.CheckState(instance == null, "Can only be set before GrpcEnvironment is initialized");
+                GrpcPreconditions.CheckArgument(sharedCapacity >= 0, "Shared capacity needs to be a non-negative number");
+                GrpcPreconditions.CheckArgument(threadLocalCapacity >= 0, "Thread local capacity needs to be a non-negative number");
+                requestCallContextPoolSharedCapacity = sharedCapacity;
+                requestCallContextPoolThreadLocalCapacity = threadLocalCapacity;
+            }
+        }
+
+        /// <summary>
         /// Occurs when <c>GrpcEnvironment</c> is about the start the shutdown logic.
         /// If <c>GrpcEnvironment</c> is later initialized and shutdown, the event will be fired again (unless unregistered first).
         /// </summary>
@@ -275,6 +300,7 @@ namespace Grpc.Core
         {
             GrpcNativeInit();
             batchContextPool = new DefaultObjectPool<BatchContextSafeHandle>(() => BatchContextSafeHandle.Create(this.batchContextPool), batchContextPoolSharedCapacity, batchContextPoolThreadLocalCapacity);
+            requestCallContextPool = new DefaultObjectPool<RequestCallContextSafeHandle>(() => RequestCallContextSafeHandle.Create(this.requestCallContextPool), requestCallContextPoolSharedCapacity, requestCallContextPoolThreadLocalCapacity);
             threadPool = new GrpcThreadPool(this, GetThreadPoolSizeOrDefault(), GetCompletionQueueCountOrDefault(), inlineHandlers);
             threadPool.Start();
         }
@@ -292,6 +318,8 @@ namespace Grpc.Core
 
         internal IObjectPool<BatchContextSafeHandle> BatchContextPool => batchContextPool;
 
+        internal IObjectPool<RequestCallContextSafeHandle> RequestCallContextPool => requestCallContextPool;
+
         internal bool IsAlive
         {
             get
diff --git a/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs b/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs
index cf3f3c0995..79d0c91420 100644
--- a/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs
+++ b/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs
@@ -37,14 +37,16 @@ namespace Grpc.Core.Internal
 
         readonly GrpcEnvironment environment;
         readonly Func<BatchContextSafeHandle> batchContextFactory;
+        readonly Func<RequestCallContextSafeHandle> requestCallContextFactory;
         readonly Dictionary<IntPtr, IOpCompletionCallback> dict = new Dictionary<IntPtr, IOpCompletionCallback>(new IntPtrComparer());
         SpinLock spinLock = new SpinLock(Debugger.IsAttached);
         IntPtr lastRegisteredKey;  // only for testing
 
-        public CompletionRegistry(GrpcEnvironment environment, Func<BatchContextSafeHandle> batchContextFactory)
+        public CompletionRegistry(GrpcEnvironment environment, Func<BatchContextSafeHandle> batchContextFactory, Func<RequestCallContextSafeHandle> requestCallContextFactory)
         {
             this.environment = GrpcPreconditions.CheckNotNull(environment);
             this.batchContextFactory = GrpcPreconditions.CheckNotNull(batchContextFactory);
+            this.requestCallContextFactory = GrpcPreconditions.CheckNotNull(requestCallContextFactory);
         }
 
         public void Register(IntPtr key, IOpCompletionCallback callback)
@@ -73,10 +75,12 @@ namespace Grpc.Core.Internal
             return ctx;
         }
 
-        public void RegisterRequestCallCompletion(RequestCallContextSafeHandle ctx, RequestCallCompletionDelegate callback)
+        public RequestCallContextSafeHandle RegisterRequestCallCompletion(RequestCallCompletionDelegate callback)
         {
+            var ctx = requestCallContextFactory();
             ctx.CompletionCallback = callback;
             Register(ctx.Handle, ctx);
+            return ctx;
         }
 
         public IOpCompletionCallback Extract(IntPtr key)
diff --git a/src/csharp/Grpc.Core/Internal/GrpcThreadPool.cs b/src/csharp/Grpc.Core/Internal/GrpcThreadPool.cs
index f1b5a4f9ff..8ddda9be5c 100644
--- a/src/csharp/Grpc.Core/Internal/GrpcThreadPool.cs
+++ b/src/csharp/Grpc.Core/Internal/GrpcThreadPool.cs
@@ -219,7 +219,7 @@ namespace Grpc.Core.Internal
             var list = new List<CompletionQueueSafeHandle>();
             for (int i = 0; i < completionQueueCount; i++)
             {
-                var completionRegistry = new CompletionRegistry(environment, () => environment.BatchContextPool.Lease());
+                var completionRegistry = new CompletionRegistry(environment, () => environment.BatchContextPool.Lease(), () => environment.RequestCallContextPool.Lease());
                 list.Add(CompletionQueueSafeHandle.CreateAsync(completionRegistry));
             }
             return list.AsReadOnly();
diff --git a/src/csharp/Grpc.Core/Internal/NativeMethods.cs b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
index 43acb8f915..8b15c2690f 100644
--- a/src/csharp/Grpc.Core/Internal/NativeMethods.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
@@ -61,6 +61,7 @@ namespace Grpc.Core.Internal
         public readonly Delegates.grpcsharp_request_call_context_host_delegate grpcsharp_request_call_context_host;
         public readonly Delegates.grpcsharp_request_call_context_deadline_delegate grpcsharp_request_call_context_deadline;
         public readonly Delegates.grpcsharp_request_call_context_request_metadata_delegate grpcsharp_request_call_context_request_metadata;
+        public readonly Delegates.grpcsharp_request_call_context_reset_delegate grpcsharp_request_call_context_reset;
         public readonly Delegates.grpcsharp_request_call_context_destroy_delegate grpcsharp_request_call_context_destroy;
 
         public readonly Delegates.grpcsharp_composite_call_credentials_create_delegate grpcsharp_composite_call_credentials_create;
@@ -179,6 +180,7 @@ namespace Grpc.Core.Internal
             this.grpcsharp_request_call_context_host = GetMethodDelegate<Delegates.grpcsharp_request_call_context_host_delegate>(library);
             this.grpcsharp_request_call_context_deadline = GetMethodDelegate<Delegates.grpcsharp_request_call_context_deadline_delegate>(library);
             this.grpcsharp_request_call_context_request_metadata = GetMethodDelegate<Delegates.grpcsharp_request_call_context_request_metadata_delegate>(library);
+            this.grpcsharp_request_call_context_reset = GetMethodDelegate<Delegates.grpcsharp_request_call_context_reset_delegate>(library);
             this.grpcsharp_request_call_context_destroy = GetMethodDelegate<Delegates.grpcsharp_request_call_context_destroy_delegate>(library);
 
             this.grpcsharp_composite_call_credentials_create = GetMethodDelegate<Delegates.grpcsharp_composite_call_credentials_create_delegate>(library);
@@ -322,6 +324,7 @@ namespace Grpc.Core.Internal
             public delegate IntPtr grpcsharp_request_call_context_host_delegate(RequestCallContextSafeHandle ctx, out UIntPtr hostLength);
             public delegate Timespec grpcsharp_request_call_context_deadline_delegate(RequestCallContextSafeHandle ctx);
             public delegate IntPtr grpcsharp_request_call_context_request_metadata_delegate(RequestCallContextSafeHandle ctx);
+            public delegate void grpcsharp_request_call_context_reset_delegate(RequestCallContextSafeHandle ctx);
             public delegate void grpcsharp_request_call_context_destroy_delegate(IntPtr ctx);
 
             public delegate CallCredentialsSafeHandle grpcsharp_composite_call_credentials_create_delegate(CallCredentialsSafeHandle creds1, CallCredentialsSafeHandle creds2);
diff --git a/src/csharp/Grpc.Core/Internal/RequestCallContextSafeHandle.cs b/src/csharp/Grpc.Core/Internal/RequestCallContextSafeHandle.cs
index 09f5c3e452..59e9d9b1ab 100644
--- a/src/csharp/Grpc.Core/Internal/RequestCallContextSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/RequestCallContextSafeHandle.cs
@@ -30,14 +30,17 @@ namespace Grpc.Core.Internal
     {
         static readonly NativeMethods Native = NativeMethods.Get();
         static readonly ILogger Logger = GrpcEnvironment.Logger.ForType<RequestCallContextSafeHandle>();
+        IObjectPool<RequestCallContextSafeHandle> ownedByPool;
 
         private RequestCallContextSafeHandle()
         {
         }
 
-        public static RequestCallContextSafeHandle Create()
+        public static RequestCallContextSafeHandle Create(IObjectPool<RequestCallContextSafeHandle> ownedByPool = null)
         {
-            return Native.grpcsharp_request_call_context_create();
+            var ctx = Native.grpcsharp_request_call_context_create();
+            ctx.ownedByPool = ownedByPool;
+            return ctx;
         }
 
         public IntPtr Handle
@@ -71,6 +74,19 @@ namespace Grpc.Core.Internal
             return new ServerRpcNew(server, call, method, host, deadline, metadata);
         }
 
+        public void Recycle()
+        {
+            if (ownedByPool != null)
+            {
+                Native.grpcsharp_request_call_context_reset(this);
+                ownedByPool.Return(this);
+            }
+            else
+            {
+                Dispose();
+            }
+        }
+
         protected override bool ReleaseHandle()
         {
             Native.grpcsharp_request_call_context_destroy(handle);
@@ -90,7 +106,7 @@ namespace Grpc.Core.Internal
             finally
             {
                 CompletionCallback = null;
-                Dispose();
+                Recycle();
             }
         }
     }
diff --git a/src/csharp/Grpc.Core/Internal/ServerSafeHandle.cs b/src/csharp/Grpc.Core/Internal/ServerSafeHandle.cs
index 9b7ea884dd..56dda9cff5 100644
--- a/src/csharp/Grpc.Core/Internal/ServerSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/ServerSafeHandle.cs
@@ -75,8 +75,7 @@ namespace Grpc.Core.Internal
         {
             using (completionQueue.NewScope())
             {
-                var ctx = RequestCallContextSafeHandle.Create();
-                completionQueue.CompletionRegistry.RegisterRequestCallCompletion(ctx, callback);
+                var ctx = completionQueue.CompletionRegistry.RegisterRequestCallCompletion(callback);
                 Native.grpcsharp_server_request_call(this, completionQueue, ctx).CheckOk();
             }
         }
diff --git a/src/csharp/Grpc.Core/Server.cs b/src/csharp/Grpc.Core/Server.cs
index 71c7f108f3..60dacbf126 100644
--- a/src/csharp/Grpc.Core/Server.cs
+++ b/src/csharp/Grpc.Core/Server.cs
@@ -300,6 +300,7 @@ namespace Grpc.Core
         {
             if (!shutdownRequested)
             {
+                // TODO(jtattermusch): avoid unnecessary delegate allocation
                 handle.RequestCall((success, ctx) => HandleNewServerRpc(success, ctx, cq), cq);
             }
         }
diff --git a/src/csharp/Grpc.Examples/MathGrpc.cs b/src/csharp/Grpc.Examples/MathGrpc.cs
index 4ed414400d..e29b1087e4 100644
--- a/src/csharp/Grpc.Examples/MathGrpc.cs
+++ b/src/csharp/Grpc.Examples/MathGrpc.cs
@@ -1,5 +1,7 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: math/math.proto
+// <auto-generated>
+//     Generated by the protocol buffer compiler.  DO NOT EDIT!
+//     source: math/math.proto
+// </auto-generated>
 // Original file comments:
 // Copyright 2015 gRPC authors.
 //
diff --git a/src/csharp/Grpc.HealthCheck/HealthGrpc.cs b/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
index 3e8eb34689..24a7259979 100644
--- a/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
+++ b/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
@@ -1,5 +1,7 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: grpc/health/v1/health.proto
+// <auto-generated>
+//     Generated by the protocol buffer compiler.  DO NOT EDIT!
+//     source: grpc/health/v1/health.proto
+// </auto-generated>
 // Original file comments:
 // Copyright 2015 gRPC authors.
 //
diff --git a/src/csharp/Grpc.IntegrationTesting/Control.cs b/src/csharp/Grpc.IntegrationTesting/Control.cs
index b15da8b8e5..8e5da7b9f2 100644
--- a/src/csharp/Grpc.IntegrationTesting/Control.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Control.cs
@@ -522,10 +522,16 @@ namespace Grpc.Testing {
       }
       switch (other.LoadCase) {
         case LoadOneofCase.ClosedLoop:
-          ClosedLoop = other.ClosedLoop;
+          if (ClosedLoop == null) {
+            ClosedLoop = new global::Grpc.Testing.ClosedLoopParams();
+          }
+          ClosedLoop.MergeFrom(other.ClosedLoop);
           break;
         case LoadOneofCase.Poisson:
-          Poisson = other.Poisson;
+          if (Poisson == null) {
+            Poisson = new global::Grpc.Testing.PoissonParams();
+          }
+          Poisson.MergeFrom(other.Poisson);
           break;
       }
 
@@ -1901,10 +1907,16 @@ namespace Grpc.Testing {
       }
       switch (other.ArgtypeCase) {
         case ArgtypeOneofCase.Setup:
-          Setup = other.Setup;
+          if (Setup == null) {
+            Setup = new global::Grpc.Testing.ClientConfig();
+          }
+          Setup.MergeFrom(other.Setup);
           break;
         case ArgtypeOneofCase.Mark:
-          Mark = other.Mark;
+          if (Mark == null) {
+            Mark = new global::Grpc.Testing.Mark();
+          }
+          Mark.MergeFrom(other.Mark);
           break;
       }
 
@@ -2508,10 +2520,16 @@ namespace Grpc.Testing {
       }
       switch (other.ArgtypeCase) {
         case ArgtypeOneofCase.Setup:
-          Setup = other.Setup;
+          if (Setup == null) {
+            Setup = new global::Grpc.Testing.ServerConfig();
+          }
+          Setup.MergeFrom(other.Setup);
           break;
         case ArgtypeOneofCase.Mark:
-          Mark = other.Mark;
+          if (Mark == null) {
+            Mark = new global::Grpc.Testing.Mark();
+          }
+          Mark.MergeFrom(other.Mark);
           break;
       }
 
diff --git a/src/csharp/Grpc.IntegrationTesting/CoreStats/Stats.cs b/src/csharp/Grpc.IntegrationTesting/CoreStats/Stats.cs
new file mode 100644
index 0000000000..380294e335
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting/CoreStats/Stats.cs
@@ -0,0 +1,623 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: grpc/core/stats.proto
+#pragma warning disable 1591, 0612, 3021
+#region Designer generated code
+
+using pb = global::Google.Protobuf;
+using pbc = global::Google.Protobuf.Collections;
+using pbr = global::Google.Protobuf.Reflection;
+using scg = global::System.Collections.Generic;
+namespace Grpc.Core {
+
+  /// <summary>Holder for reflection information generated from grpc/core/stats.proto</summary>
+  public static partial class StatsReflection {
+
+    #region Descriptor
+    /// <summary>File descriptor for grpc/core/stats.proto</summary>
+    public static pbr::FileDescriptor Descriptor {
+      get { return descriptor; }
+    }
+    private static pbr::FileDescriptor descriptor;
+
+    static StatsReflection() {
+      byte[] descriptorData = global::System.Convert.FromBase64String(
+          string.Concat(
+            "ChVncnBjL2NvcmUvc3RhdHMucHJvdG8SCWdycGMuY29yZSImCgZCdWNrZXQS",
+            "DQoFc3RhcnQYASABKAESDQoFY291bnQYAiABKAQiLwoJSGlzdG9ncmFtEiIK",
+            "B2J1Y2tldHMYASADKAsyES5ncnBjLmNvcmUuQnVja2V0IlsKBk1ldHJpYxIM",
+            "CgRuYW1lGAEgASgJEg8KBWNvdW50GAogASgESAASKQoJaGlzdG9ncmFtGAsg",
+            "ASgLMhQuZ3JwYy5jb3JlLkhpc3RvZ3JhbUgAQgcKBXZhbHVlIisKBVN0YXRz",
+            "EiIKB21ldHJpY3MYASADKAsyES5ncnBjLmNvcmUuTWV0cmljYgZwcm90bzM="));
+      descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
+          new pbr::FileDescriptor[] { },
+          new pbr::GeneratedClrTypeInfo(null, new pbr::GeneratedClrTypeInfo[] {
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Core.Bucket), global::Grpc.Core.Bucket.Parser, new[]{ "Start", "Count" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Core.Histogram), global::Grpc.Core.Histogram.Parser, new[]{ "Buckets" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Core.Metric), global::Grpc.Core.Metric.Parser, new[]{ "Name", "Count", "Histogram" }, new[]{ "Value" }, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Core.Stats), global::Grpc.Core.Stats.Parser, new[]{ "Metrics" }, null, null, null)
+          }));
+    }
+    #endregion
+
+  }
+  #region Messages
+  public sealed partial class Bucket : pb::IMessage<Bucket> {
+    private static readonly pb::MessageParser<Bucket> _parser = new pb::MessageParser<Bucket>(() => new Bucket());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<Bucket> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Core.StatsReflection.Descriptor.MessageTypes[0]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Bucket() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Bucket(Bucket other) : this() {
+      start_ = other.start_;
+      count_ = other.count_;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Bucket Clone() {
+      return new Bucket(this);
+    }
+
+    /// <summary>Field number for the "start" field.</summary>
+    public const int StartFieldNumber = 1;
+    private double start_;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public double Start {
+      get { return start_; }
+      set {
+        start_ = value;
+      }
+    }
+
+    /// <summary>Field number for the "count" field.</summary>
+    public const int CountFieldNumber = 2;
+    private ulong count_;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ulong Count {
+      get { return count_; }
+      set {
+        count_ = value;
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as Bucket);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(Bucket other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (Start != other.Start) return false;
+      if (Count != other.Count) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      if (Start != 0D) hash ^= Start.GetHashCode();
+      if (Count != 0UL) hash ^= Count.GetHashCode();
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (Start != 0D) {
+        output.WriteRawTag(9);
+        output.WriteDouble(Start);
+      }
+      if (Count != 0UL) {
+        output.WriteRawTag(16);
+        output.WriteUInt64(Count);
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      if (Start != 0D) {
+        size += 1 + 8;
+      }
+      if (Count != 0UL) {
+        size += 1 + pb::CodedOutputStream.ComputeUInt64Size(Count);
+      }
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(Bucket other) {
+      if (other == null) {
+        return;
+      }
+      if (other.Start != 0D) {
+        Start = other.Start;
+      }
+      if (other.Count != 0UL) {
+        Count = other.Count;
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 9: {
+            Start = input.ReadDouble();
+            break;
+          }
+          case 16: {
+            Count = input.ReadUInt64();
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  public sealed partial class Histogram : pb::IMessage<Histogram> {
+    private static readonly pb::MessageParser<Histogram> _parser = new pb::MessageParser<Histogram>(() => new Histogram());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<Histogram> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Core.StatsReflection.Descriptor.MessageTypes[1]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Histogram() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Histogram(Histogram other) : this() {
+      buckets_ = other.buckets_.Clone();
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Histogram Clone() {
+      return new Histogram(this);
+    }
+
+    /// <summary>Field number for the "buckets" field.</summary>
+    public const int BucketsFieldNumber = 1;
+    private static readonly pb::FieldCodec<global::Grpc.Core.Bucket> _repeated_buckets_codec
+        = pb::FieldCodec.ForMessage(10, global::Grpc.Core.Bucket.Parser);
+    private readonly pbc::RepeatedField<global::Grpc.Core.Bucket> buckets_ = new pbc::RepeatedField<global::Grpc.Core.Bucket>();
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public pbc::RepeatedField<global::Grpc.Core.Bucket> Buckets {
+      get { return buckets_; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as Histogram);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(Histogram other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if(!buckets_.Equals(other.buckets_)) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      hash ^= buckets_.GetHashCode();
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      buckets_.WriteTo(output, _repeated_buckets_codec);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      size += buckets_.CalculateSize(_repeated_buckets_codec);
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(Histogram other) {
+      if (other == null) {
+        return;
+      }
+      buckets_.Add(other.buckets_);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 10: {
+            buckets_.AddEntriesFrom(input, _repeated_buckets_codec);
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  public sealed partial class Metric : pb::IMessage<Metric> {
+    private static readonly pb::MessageParser<Metric> _parser = new pb::MessageParser<Metric>(() => new Metric());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<Metric> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Core.StatsReflection.Descriptor.MessageTypes[2]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Metric() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Metric(Metric other) : this() {
+      name_ = other.name_;
+      switch (other.ValueCase) {
+        case ValueOneofCase.Count:
+          Count = other.Count;
+          break;
+        case ValueOneofCase.Histogram:
+          Histogram = other.Histogram.Clone();
+          break;
+      }
+
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Metric Clone() {
+      return new Metric(this);
+    }
+
+    /// <summary>Field number for the "name" field.</summary>
+    public const int NameFieldNumber = 1;
+    private string name_ = "";
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public string Name {
+      get { return name_; }
+      set {
+        name_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+      }
+    }
+
+    /// <summary>Field number for the "count" field.</summary>
+    public const int CountFieldNumber = 10;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ulong Count {
+      get { return valueCase_ == ValueOneofCase.Count ? (ulong) value_ : 0UL; }
+      set {
+        value_ = value;
+        valueCase_ = ValueOneofCase.Count;
+      }
+    }
+
+    /// <summary>Field number for the "histogram" field.</summary>
+    public const int HistogramFieldNumber = 11;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public global::Grpc.Core.Histogram Histogram {
+      get { return valueCase_ == ValueOneofCase.Histogram ? (global::Grpc.Core.Histogram) value_ : null; }
+      set {
+        value_ = value;
+        valueCase_ = value == null ? ValueOneofCase.None : ValueOneofCase.Histogram;
+      }
+    }
+
+    private object value_;
+    /// <summary>Enum of possible cases for the "value" oneof.</summary>
+    public enum ValueOneofCase {
+      None = 0,
+      Count = 10,
+      Histogram = 11,
+    }
+    private ValueOneofCase valueCase_ = ValueOneofCase.None;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ValueOneofCase ValueCase {
+      get { return valueCase_; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void ClearValue() {
+      valueCase_ = ValueOneofCase.None;
+      value_ = null;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as Metric);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(Metric other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (Name != other.Name) return false;
+      if (Count != other.Count) return false;
+      if (!object.Equals(Histogram, other.Histogram)) return false;
+      if (ValueCase != other.ValueCase) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      if (Name.Length != 0) hash ^= Name.GetHashCode();
+      if (valueCase_ == ValueOneofCase.Count) hash ^= Count.GetHashCode();
+      if (valueCase_ == ValueOneofCase.Histogram) hash ^= Histogram.GetHashCode();
+      hash ^= (int) valueCase_;
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (Name.Length != 0) {
+        output.WriteRawTag(10);
+        output.WriteString(Name);
+      }
+      if (valueCase_ == ValueOneofCase.Count) {
+        output.WriteRawTag(80);
+        output.WriteUInt64(Count);
+      }
+      if (valueCase_ == ValueOneofCase.Histogram) {
+        output.WriteRawTag(90);
+        output.WriteMessage(Histogram);
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      if (Name.Length != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(Name);
+      }
+      if (valueCase_ == ValueOneofCase.Count) {
+        size += 1 + pb::CodedOutputStream.ComputeUInt64Size(Count);
+      }
+      if (valueCase_ == ValueOneofCase.Histogram) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(Histogram);
+      }
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(Metric other) {
+      if (other == null) {
+        return;
+      }
+      if (other.Name.Length != 0) {
+        Name = other.Name;
+      }
+      switch (other.ValueCase) {
+        case ValueOneofCase.Count:
+          Count = other.Count;
+          break;
+        case ValueOneofCase.Histogram:
+          if (Histogram == null) {
+            Histogram = new global::Grpc.Core.Histogram();
+          }
+          Histogram.MergeFrom(other.Histogram);
+          break;
+      }
+
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 10: {
+            Name = input.ReadString();
+            break;
+          }
+          case 80: {
+            Count = input.ReadUInt64();
+            break;
+          }
+          case 90: {
+            global::Grpc.Core.Histogram subBuilder = new global::Grpc.Core.Histogram();
+            if (valueCase_ == ValueOneofCase.Histogram) {
+              subBuilder.MergeFrom(Histogram);
+            }
+            input.ReadMessage(subBuilder);
+            Histogram = subBuilder;
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  public sealed partial class Stats : pb::IMessage<Stats> {
+    private static readonly pb::MessageParser<Stats> _parser = new pb::MessageParser<Stats>(() => new Stats());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<Stats> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Core.StatsReflection.Descriptor.MessageTypes[3]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Stats() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Stats(Stats other) : this() {
+      metrics_ = other.metrics_.Clone();
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Stats Clone() {
+      return new Stats(this);
+    }
+
+    /// <summary>Field number for the "metrics" field.</summary>
+    public const int MetricsFieldNumber = 1;
+    private static readonly pb::FieldCodec<global::Grpc.Core.Metric> _repeated_metrics_codec
+        = pb::FieldCodec.ForMessage(10, global::Grpc.Core.Metric.Parser);
+    private readonly pbc::RepeatedField<global::Grpc.Core.Metric> metrics_ = new pbc::RepeatedField<global::Grpc.Core.Metric>();
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public pbc::RepeatedField<global::Grpc.Core.Metric> Metrics {
+      get { return metrics_; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as Stats);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(Stats other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if(!metrics_.Equals(other.metrics_)) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      hash ^= metrics_.GetHashCode();
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      metrics_.WriteTo(output, _repeated_metrics_codec);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      size += metrics_.CalculateSize(_repeated_metrics_codec);
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(Stats other) {
+      if (other == null) {
+        return;
+      }
+      metrics_.Add(other.metrics_);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 10: {
+            metrics_.AddEntriesFrom(input, _repeated_metrics_codec);
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  #endregion
+
+}
+
+#endregion Designer generated code
diff --git a/src/csharp/Grpc.IntegrationTesting/EchoMessages.cs b/src/csharp/Grpc.IntegrationTesting/EchoMessages.cs
index b2fe73acdf..9581aded58 100644
--- a/src/csharp/Grpc.IntegrationTesting/EchoMessages.cs
+++ b/src/csharp/Grpc.IntegrationTesting/EchoMessages.cs
@@ -26,7 +26,7 @@ namespace Grpc.Testing {
             "DGdycGMudGVzdGluZyIyCglEZWJ1Z0luZm8SFQoNc3RhY2tfZW50cmllcxgB",
             "IAMoCRIOCgZkZXRhaWwYAiABKAkiUAoLRXJyb3JTdGF0dXMSDAoEY29kZRgB",
             "IAEoBRIVCg1lcnJvcl9tZXNzYWdlGAIgASgJEhwKFGJpbmFyeV9lcnJvcl9k",
-            "ZXRhaWxzGAMgASgJIskDCg1SZXF1ZXN0UGFyYW1zEhUKDWVjaG9fZGVhZGxp",
+            "ZXRhaWxzGAMgASgJIuIDCg1SZXF1ZXN0UGFyYW1zEhUKDWVjaG9fZGVhZGxp",
             "bmUYASABKAgSHgoWY2xpZW50X2NhbmNlbF9hZnRlcl91cxgCIAEoBRIeChZz",
             "ZXJ2ZXJfY2FuY2VsX2FmdGVyX3VzGAMgASgFEhUKDWVjaG9fbWV0YWRhdGEY",
             "BCABKAgSGgoSY2hlY2tfYXV0aF9jb250ZXh0GAUgASgIEh8KF3Jlc3BvbnNl",
@@ -36,18 +36,19 @@ namespace Grpc.Testing {
             "X3R5cGUYCiABKAkSKwoKZGVidWdfaW5mbxgLIAEoCzIXLmdycGMudGVzdGlu",
             "Zy5EZWJ1Z0luZm8SEgoKc2VydmVyX2RpZRgMIAEoCBIcChRiaW5hcnlfZXJy",
             "b3JfZGV0YWlscxgNIAEoCRIxCg5leHBlY3RlZF9lcnJvchgOIAEoCzIZLmdy",
-            "cGMudGVzdGluZy5FcnJvclN0YXR1cyJKCgtFY2hvUmVxdWVzdBIPCgdtZXNz",
-            "YWdlGAEgASgJEioKBXBhcmFtGAIgASgLMhsuZ3JwYy50ZXN0aW5nLlJlcXVl",
-            "c3RQYXJhbXMiRgoOUmVzcG9uc2VQYXJhbXMSGAoQcmVxdWVzdF9kZWFkbGlu",
-            "ZRgBIAEoAxIMCgRob3N0GAIgASgJEgwKBHBlZXIYAyABKAkiTAoMRWNob1Jl",
-            "c3BvbnNlEg8KB21lc3NhZ2UYASABKAkSKwoFcGFyYW0YAiABKAsyHC5ncnBj",
-            "LnRlc3RpbmcuUmVzcG9uc2VQYXJhbXNiBnByb3RvMw=="));
+            "cGMudGVzdGluZy5FcnJvclN0YXR1cxIXCg9zZXJ2ZXJfc2xlZXBfdXMYDyAB",
+            "KAUiSgoLRWNob1JlcXVlc3QSDwoHbWVzc2FnZRgBIAEoCRIqCgVwYXJhbRgC",
+            "IAEoCzIbLmdycGMudGVzdGluZy5SZXF1ZXN0UGFyYW1zIkYKDlJlc3BvbnNl",
+            "UGFyYW1zEhgKEHJlcXVlc3RfZGVhZGxpbmUYASABKAMSDAoEaG9zdBgCIAEo",
+            "CRIMCgRwZWVyGAMgASgJIkwKDEVjaG9SZXNwb25zZRIPCgdtZXNzYWdlGAEg",
+            "ASgJEisKBXBhcmFtGAIgASgLMhwuZ3JwYy50ZXN0aW5nLlJlc3BvbnNlUGFy",
+            "YW1zYgZwcm90bzM="));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
           new pbr::FileDescriptor[] { },
           new pbr::GeneratedClrTypeInfo(null, new pbr::GeneratedClrTypeInfo[] {
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.DebugInfo), global::Grpc.Testing.DebugInfo.Parser, new[]{ "StackEntries", "Detail" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ErrorStatus), global::Grpc.Testing.ErrorStatus.Parser, new[]{ "Code", "ErrorMessage", "BinaryErrorDetails" }, null, null, null),
-            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.RequestParams), global::Grpc.Testing.RequestParams.Parser, new[]{ "EchoDeadline", "ClientCancelAfterUs", "ServerCancelAfterUs", "EchoMetadata", "CheckAuthContext", "ResponseMessageLength", "EchoPeer", "ExpectedClientIdentity", "SkipCancelledCheck", "ExpectedTransportSecurityType", "DebugInfo", "ServerDie", "BinaryErrorDetails", "ExpectedError" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.RequestParams), global::Grpc.Testing.RequestParams.Parser, new[]{ "EchoDeadline", "ClientCancelAfterUs", "ServerCancelAfterUs", "EchoMetadata", "CheckAuthContext", "ResponseMessageLength", "EchoPeer", "ExpectedClientIdentity", "SkipCancelledCheck", "ExpectedTransportSecurityType", "DebugInfo", "ServerDie", "BinaryErrorDetails", "ExpectedError", "ServerSleepUs" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.EchoRequest), global::Grpc.Testing.EchoRequest.Parser, new[]{ "Message", "Param" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ResponseParams), global::Grpc.Testing.ResponseParams.Parser, new[]{ "RequestDeadline", "Host", "Peer" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.EchoResponse), global::Grpc.Testing.EchoResponse.Parser, new[]{ "Message", "Param" }, null, null, null)
@@ -411,6 +412,7 @@ namespace Grpc.Testing {
       serverDie_ = other.serverDie_;
       binaryErrorDetails_ = other.binaryErrorDetails_;
       ExpectedError = other.expectedError_ != null ? other.ExpectedError.Clone() : null;
+      serverSleepUs_ = other.serverSleepUs_;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -578,6 +580,20 @@ namespace Grpc.Testing {
       }
     }
 
+    /// <summary>Field number for the "server_sleep_us" field.</summary>
+    public const int ServerSleepUsFieldNumber = 15;
+    private int serverSleepUs_;
+    /// <summary>
+    /// Amount to sleep when invoking server
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int ServerSleepUs {
+      get { return serverSleepUs_; }
+      set {
+        serverSleepUs_ = value;
+      }
+    }
+
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public override bool Equals(object other) {
       return Equals(other as RequestParams);
@@ -605,6 +621,7 @@ namespace Grpc.Testing {
       if (ServerDie != other.ServerDie) return false;
       if (BinaryErrorDetails != other.BinaryErrorDetails) return false;
       if (!object.Equals(ExpectedError, other.ExpectedError)) return false;
+      if (ServerSleepUs != other.ServerSleepUs) return false;
       return true;
     }
 
@@ -625,6 +642,7 @@ namespace Grpc.Testing {
       if (ServerDie != false) hash ^= ServerDie.GetHashCode();
       if (BinaryErrorDetails.Length != 0) hash ^= BinaryErrorDetails.GetHashCode();
       if (expectedError_ != null) hash ^= ExpectedError.GetHashCode();
+      if (ServerSleepUs != 0) hash ^= ServerSleepUs.GetHashCode();
       return hash;
     }
 
@@ -691,6 +709,10 @@ namespace Grpc.Testing {
         output.WriteRawTag(114);
         output.WriteMessage(ExpectedError);
       }
+      if (ServerSleepUs != 0) {
+        output.WriteRawTag(120);
+        output.WriteInt32(ServerSleepUs);
+      }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -738,6 +760,9 @@ namespace Grpc.Testing {
       if (expectedError_ != null) {
         size += 1 + pb::CodedOutputStream.ComputeMessageSize(ExpectedError);
       }
+      if (ServerSleepUs != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeInt32Size(ServerSleepUs);
+      }
       return size;
     }
 
@@ -794,6 +819,9 @@ namespace Grpc.Testing {
         }
         ExpectedError.MergeFrom(other.ExpectedError);
       }
+      if (other.ServerSleepUs != 0) {
+        ServerSleepUs = other.ServerSleepUs;
+      }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -866,6 +894,10 @@ namespace Grpc.Testing {
             input.ReadMessage(expectedError_);
             break;
           }
+          case 120: {
+            ServerSleepUs = input.ReadInt32();
+            break;
+          }
         }
       }
     }
diff --git a/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs b/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
index 9a664f3539..f71d6d197d 100644
--- a/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
@@ -1,5 +1,7 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: src/proto/grpc/testing/metrics.proto
+// <auto-generated>
+//     Generated by the protocol buffer compiler.  DO NOT EDIT!
+//     source: src/proto/grpc/testing/metrics.proto
+// </auto-generated>
 // Original file comments:
 // Copyright 2015-2016 gRPC authors.
 //
diff --git a/src/csharp/Grpc.IntegrationTesting/Payloads.cs b/src/csharp/Grpc.IntegrationTesting/Payloads.cs
index f918b9576b..fca8cda6f6 100644
--- a/src/csharp/Grpc.IntegrationTesting/Payloads.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Payloads.cs
@@ -596,13 +596,22 @@ namespace Grpc.Testing {
       }
       switch (other.PayloadCase) {
         case PayloadOneofCase.BytebufParams:
-          BytebufParams = other.BytebufParams;
+          if (BytebufParams == null) {
+            BytebufParams = new global::Grpc.Testing.ByteBufferParams();
+          }
+          BytebufParams.MergeFrom(other.BytebufParams);
           break;
         case PayloadOneofCase.SimpleParams:
-          SimpleParams = other.SimpleParams;
+          if (SimpleParams == null) {
+            SimpleParams = new global::Grpc.Testing.SimpleProtoParams();
+          }
+          SimpleParams.MergeFrom(other.SimpleParams);
           break;
         case PayloadOneofCase.ComplexParams:
-          ComplexParams = other.ComplexParams;
+          if (ComplexParams == null) {
+            ComplexParams = new global::Grpc.Testing.ComplexProtoParams();
+          }
+          ComplexParams.MergeFrom(other.ComplexParams);
           break;
       }
 
diff --git a/src/csharp/Grpc.IntegrationTesting/Services.cs b/src/csharp/Grpc.IntegrationTesting/Services.cs
index 7a0845dffb..4b761706ed 100644
--- a/src/csharp/Grpc.IntegrationTesting/Services.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Services.cs
@@ -24,28 +24,27 @@ namespace Grpc.Testing {
           string.Concat(
             "CiVzcmMvcHJvdG8vZ3JwYy90ZXN0aW5nL3NlcnZpY2VzLnByb3RvEgxncnBj",
             "LnRlc3RpbmcaJXNyYy9wcm90by9ncnBjL3Rlc3RpbmcvbWVzc2FnZXMucHJv",
-            "dG8aJHNyYy9wcm90by9ncnBjL3Rlc3RpbmcvY29udHJvbC5wcm90bxoic3Jj",
-            "L3Byb3RvL2dycGMvdGVzdGluZy9zdGF0cy5wcm90bzKmAwoQQmVuY2htYXJr",
-            "U2VydmljZRJGCglVbmFyeUNhbGwSGy5ncnBjLnRlc3RpbmcuU2ltcGxlUmVx",
-            "dWVzdBocLmdycGMudGVzdGluZy5TaW1wbGVSZXNwb25zZRJOCg1TdHJlYW1p",
-            "bmdDYWxsEhsuZ3JwYy50ZXN0aW5nLlNpbXBsZVJlcXVlc3QaHC5ncnBjLnRl",
-            "c3RpbmcuU2ltcGxlUmVzcG9uc2UoATABElIKE1N0cmVhbWluZ0Zyb21DbGll",
-            "bnQSGy5ncnBjLnRlc3RpbmcuU2ltcGxlUmVxdWVzdBocLmdycGMudGVzdGlu",
-            "Zy5TaW1wbGVSZXNwb25zZSgBElIKE1N0cmVhbWluZ0Zyb21TZXJ2ZXISGy5n",
-            "cnBjLnRlc3RpbmcuU2ltcGxlUmVxdWVzdBocLmdycGMudGVzdGluZy5TaW1w",
-            "bGVSZXNwb25zZTABElIKEVN0cmVhbWluZ0JvdGhXYXlzEhsuZ3JwYy50ZXN0",
-            "aW5nLlNpbXBsZVJlcXVlc3QaHC5ncnBjLnRlc3RpbmcuU2ltcGxlUmVzcG9u",
-            "c2UoATABMpcCCg1Xb3JrZXJTZXJ2aWNlEkUKCVJ1blNlcnZlchIYLmdycGMu",
-            "dGVzdGluZy5TZXJ2ZXJBcmdzGhouZ3JwYy50ZXN0aW5nLlNlcnZlclN0YXR1",
-            "cygBMAESRQoJUnVuQ2xpZW50EhguZ3JwYy50ZXN0aW5nLkNsaWVudEFyZ3Ma",
-            "Gi5ncnBjLnRlc3RpbmcuQ2xpZW50U3RhdHVzKAEwARJCCglDb3JlQ291bnQS",
-            "GS5ncnBjLnRlc3RpbmcuQ29yZVJlcXVlc3QaGi5ncnBjLnRlc3RpbmcuQ29y",
-            "ZVJlc3BvbnNlEjQKClF1aXRXb3JrZXISEi5ncnBjLnRlc3RpbmcuVm9pZBoS",
-            "LmdycGMudGVzdGluZy5Wb2lkMl4KGFJlcG9ydFFwc1NjZW5hcmlvU2Vydmlj",
-            "ZRJCCg5SZXBvcnRTY2VuYXJpbxIcLmdycGMudGVzdGluZy5TY2VuYXJpb1Jl",
-            "c3VsdBoSLmdycGMudGVzdGluZy5Wb2lkYgZwcm90bzM="));
+            "dG8aJHNyYy9wcm90by9ncnBjL3Rlc3RpbmcvY29udHJvbC5wcm90bzKmAwoQ",
+            "QmVuY2htYXJrU2VydmljZRJGCglVbmFyeUNhbGwSGy5ncnBjLnRlc3Rpbmcu",
+            "U2ltcGxlUmVxdWVzdBocLmdycGMudGVzdGluZy5TaW1wbGVSZXNwb25zZRJO",
+            "Cg1TdHJlYW1pbmdDYWxsEhsuZ3JwYy50ZXN0aW5nLlNpbXBsZVJlcXVlc3Qa",
+            "HC5ncnBjLnRlc3RpbmcuU2ltcGxlUmVzcG9uc2UoATABElIKE1N0cmVhbWlu",
+            "Z0Zyb21DbGllbnQSGy5ncnBjLnRlc3RpbmcuU2ltcGxlUmVxdWVzdBocLmdy",
+            "cGMudGVzdGluZy5TaW1wbGVSZXNwb25zZSgBElIKE1N0cmVhbWluZ0Zyb21T",
+            "ZXJ2ZXISGy5ncnBjLnRlc3RpbmcuU2ltcGxlUmVxdWVzdBocLmdycGMudGVz",
+            "dGluZy5TaW1wbGVSZXNwb25zZTABElIKEVN0cmVhbWluZ0JvdGhXYXlzEhsu",
+            "Z3JwYy50ZXN0aW5nLlNpbXBsZVJlcXVlc3QaHC5ncnBjLnRlc3RpbmcuU2lt",
+            "cGxlUmVzcG9uc2UoATABMpcCCg1Xb3JrZXJTZXJ2aWNlEkUKCVJ1blNlcnZl",
+            "chIYLmdycGMudGVzdGluZy5TZXJ2ZXJBcmdzGhouZ3JwYy50ZXN0aW5nLlNl",
+            "cnZlclN0YXR1cygBMAESRQoJUnVuQ2xpZW50EhguZ3JwYy50ZXN0aW5nLkNs",
+            "aWVudEFyZ3MaGi5ncnBjLnRlc3RpbmcuQ2xpZW50U3RhdHVzKAEwARJCCglD",
+            "b3JlQ291bnQSGS5ncnBjLnRlc3RpbmcuQ29yZVJlcXVlc3QaGi5ncnBjLnRl",
+            "c3RpbmcuQ29yZVJlc3BvbnNlEjQKClF1aXRXb3JrZXISEi5ncnBjLnRlc3Rp",
+            "bmcuVm9pZBoSLmdycGMudGVzdGluZy5Wb2lkMl4KGFJlcG9ydFFwc1NjZW5h",
+            "cmlvU2VydmljZRJCCg5SZXBvcnRTY2VuYXJpbxIcLmdycGMudGVzdGluZy5T",
+            "Y2VuYXJpb1Jlc3VsdBoSLmdycGMudGVzdGluZy5Wb2lkYgZwcm90bzM="));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
-          new pbr::FileDescriptor[] { global::Grpc.Testing.MessagesReflection.Descriptor, global::Grpc.Testing.ControlReflection.Descriptor, global::Grpc.Testing.StatsReflection.Descriptor, },
+          new pbr::FileDescriptor[] { global::Grpc.Testing.MessagesReflection.Descriptor, global::Grpc.Testing.ControlReflection.Descriptor, },
           new pbr::GeneratedClrTypeInfo(null, null));
     }
     #endregion
diff --git a/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs b/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
index bfae4ee6ac..d2e4f2e4a5 100644
--- a/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
@@ -1,5 +1,7 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: src/proto/grpc/testing/services.proto
+// <auto-generated>
+//     Generated by the protocol buffer compiler.  DO NOT EDIT!
+//     source: src/proto/grpc/testing/services.proto
+// </auto-generated>
 // Original file comments:
 // Copyright 2015 gRPC authors.
 //
diff --git a/src/csharp/Grpc.IntegrationTesting/Stats.cs b/src/csharp/Grpc.IntegrationTesting/Stats.cs
index 23b56df6bd..e082ae7719 100644
--- a/src/csharp/Grpc.IntegrationTesting/Stats.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Stats.cs
@@ -23,28 +23,30 @@ namespace Grpc.Testing {
       byte[] descriptorData = global::System.Convert.FromBase64String(
           string.Concat(
             "CiJzcmMvcHJvdG8vZ3JwYy90ZXN0aW5nL3N0YXRzLnByb3RvEgxncnBjLnRl",
-            "c3RpbmcikQEKC1NlcnZlclN0YXRzEhQKDHRpbWVfZWxhcHNlZBgBIAEoARIR",
-            "Cgl0aW1lX3VzZXIYAiABKAESEwoLdGltZV9zeXN0ZW0YAyABKAESFgoOdG90",
-            "YWxfY3B1X3RpbWUYBCABKAQSFQoNaWRsZV9jcHVfdGltZRgFIAEoBBIVCg1j",
-            "cV9wb2xsX2NvdW50GAYgASgEIjsKD0hpc3RvZ3JhbVBhcmFtcxISCgpyZXNv",
-            "bHV0aW9uGAEgASgBEhQKDG1heF9wb3NzaWJsZRgCIAEoASJ3Cg1IaXN0b2dy",
-            "YW1EYXRhEg4KBmJ1Y2tldBgBIAMoDRIQCghtaW5fc2VlbhgCIAEoARIQCght",
-            "YXhfc2VlbhgDIAEoARILCgNzdW0YBCABKAESFgoOc3VtX29mX3NxdWFyZXMY",
-            "BSABKAESDQoFY291bnQYBiABKAEiOAoSUmVxdWVzdFJlc3VsdENvdW50EhMK",
-            "C3N0YXR1c19jb2RlGAEgASgFEg0KBWNvdW50GAIgASgDIs0BCgtDbGllbnRT",
-            "dGF0cxIuCglsYXRlbmNpZXMYASABKAsyGy5ncnBjLnRlc3RpbmcuSGlzdG9n",
-            "cmFtRGF0YRIUCgx0aW1lX2VsYXBzZWQYAiABKAESEQoJdGltZV91c2VyGAMg",
-            "ASgBEhMKC3RpbWVfc3lzdGVtGAQgASgBEjkKD3JlcXVlc3RfcmVzdWx0cxgF",
-            "IAMoCzIgLmdycGMudGVzdGluZy5SZXF1ZXN0UmVzdWx0Q291bnQSFQoNY3Ff",
-            "cG9sbF9jb3VudBgGIAEoBGIGcHJvdG8z"));
+            "c3RpbmcaH3NyYy9wcm90by9ncnBjL2NvcmUvc3RhdHMucHJvdG8itwEKC1Nl",
+            "cnZlclN0YXRzEhQKDHRpbWVfZWxhcHNlZBgBIAEoARIRCgl0aW1lX3VzZXIY",
+            "AiABKAESEwoLdGltZV9zeXN0ZW0YAyABKAESFgoOdG90YWxfY3B1X3RpbWUY",
+            "BCABKAQSFQoNaWRsZV9jcHVfdGltZRgFIAEoBBIVCg1jcV9wb2xsX2NvdW50",
+            "GAYgASgEEiQKCmNvcmVfc3RhdHMYByABKAsyEC5ncnBjLmNvcmUuU3RhdHMi",
+            "OwoPSGlzdG9ncmFtUGFyYW1zEhIKCnJlc29sdXRpb24YASABKAESFAoMbWF4",
+            "X3Bvc3NpYmxlGAIgASgBIncKDUhpc3RvZ3JhbURhdGESDgoGYnVja2V0GAEg",
+            "AygNEhAKCG1pbl9zZWVuGAIgASgBEhAKCG1heF9zZWVuGAMgASgBEgsKA3N1",
+            "bRgEIAEoARIWCg5zdW1fb2Zfc3F1YXJlcxgFIAEoARINCgVjb3VudBgGIAEo",
+            "ASI4ChJSZXF1ZXN0UmVzdWx0Q291bnQSEwoLc3RhdHVzX2NvZGUYASABKAUS",
+            "DQoFY291bnQYAiABKAMi8wEKC0NsaWVudFN0YXRzEi4KCWxhdGVuY2llcxgB",
+            "IAEoCzIbLmdycGMudGVzdGluZy5IaXN0b2dyYW1EYXRhEhQKDHRpbWVfZWxh",
+            "cHNlZBgCIAEoARIRCgl0aW1lX3VzZXIYAyABKAESEwoLdGltZV9zeXN0ZW0Y",
+            "BCABKAESOQoPcmVxdWVzdF9yZXN1bHRzGAUgAygLMiAuZ3JwYy50ZXN0aW5n",
+            "LlJlcXVlc3RSZXN1bHRDb3VudBIVCg1jcV9wb2xsX2NvdW50GAYgASgEEiQK",
+            "CmNvcmVfc3RhdHMYByABKAsyEC5ncnBjLmNvcmUuU3RhdHNiBnByb3RvMw=="));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
-          new pbr::FileDescriptor[] { },
+          new pbr::FileDescriptor[] { global::Grpc.Core.StatsReflection.Descriptor, },
           new pbr::GeneratedClrTypeInfo(null, new pbr::GeneratedClrTypeInfo[] {
-            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ServerStats), global::Grpc.Testing.ServerStats.Parser, new[]{ "TimeElapsed", "TimeUser", "TimeSystem", "TotalCpuTime", "IdleCpuTime", "CqPollCount" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ServerStats), global::Grpc.Testing.ServerStats.Parser, new[]{ "TimeElapsed", "TimeUser", "TimeSystem", "TotalCpuTime", "IdleCpuTime", "CqPollCount", "CoreStats" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.HistogramParams), global::Grpc.Testing.HistogramParams.Parser, new[]{ "Resolution", "MaxPossible" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.HistogramData), global::Grpc.Testing.HistogramData.Parser, new[]{ "Bucket", "MinSeen", "MaxSeen", "Sum", "SumOfSquares", "Count" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.RequestResultCount), global::Grpc.Testing.RequestResultCount.Parser, new[]{ "StatusCode", "Count" }, null, null, null),
-            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ClientStats), global::Grpc.Testing.ClientStats.Parser, new[]{ "Latencies", "TimeElapsed", "TimeUser", "TimeSystem", "RequestResults", "CqPollCount" }, null, null, null)
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ClientStats), global::Grpc.Testing.ClientStats.Parser, new[]{ "Latencies", "TimeElapsed", "TimeUser", "TimeSystem", "RequestResults", "CqPollCount", "CoreStats" }, null, null, null)
           }));
     }
     #endregion
@@ -81,6 +83,7 @@ namespace Grpc.Testing {
       totalCpuTime_ = other.totalCpuTime_;
       idleCpuTime_ = other.idleCpuTime_;
       cqPollCount_ = other.cqPollCount_;
+      CoreStats = other.coreStats_ != null ? other.CoreStats.Clone() : null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -173,6 +176,20 @@ namespace Grpc.Testing {
       }
     }
 
+    /// <summary>Field number for the "core_stats" field.</summary>
+    public const int CoreStatsFieldNumber = 7;
+    private global::Grpc.Core.Stats coreStats_;
+    /// <summary>
+    /// Core library stats
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public global::Grpc.Core.Stats CoreStats {
+      get { return coreStats_; }
+      set {
+        coreStats_ = value;
+      }
+    }
+
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public override bool Equals(object other) {
       return Equals(other as ServerStats);
@@ -192,6 +209,7 @@ namespace Grpc.Testing {
       if (TotalCpuTime != other.TotalCpuTime) return false;
       if (IdleCpuTime != other.IdleCpuTime) return false;
       if (CqPollCount != other.CqPollCount) return false;
+      if (!object.Equals(CoreStats, other.CoreStats)) return false;
       return true;
     }
 
@@ -204,6 +222,7 @@ namespace Grpc.Testing {
       if (TotalCpuTime != 0UL) hash ^= TotalCpuTime.GetHashCode();
       if (IdleCpuTime != 0UL) hash ^= IdleCpuTime.GetHashCode();
       if (CqPollCount != 0UL) hash ^= CqPollCount.GetHashCode();
+      if (coreStats_ != null) hash ^= CoreStats.GetHashCode();
       return hash;
     }
 
@@ -238,6 +257,10 @@ namespace Grpc.Testing {
         output.WriteRawTag(48);
         output.WriteUInt64(CqPollCount);
       }
+      if (coreStats_ != null) {
+        output.WriteRawTag(58);
+        output.WriteMessage(CoreStats);
+      }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -261,6 +284,9 @@ namespace Grpc.Testing {
       if (CqPollCount != 0UL) {
         size += 1 + pb::CodedOutputStream.ComputeUInt64Size(CqPollCount);
       }
+      if (coreStats_ != null) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(CoreStats);
+      }
       return size;
     }
 
@@ -287,6 +313,12 @@ namespace Grpc.Testing {
       if (other.CqPollCount != 0UL) {
         CqPollCount = other.CqPollCount;
       }
+      if (other.coreStats_ != null) {
+        if (coreStats_ == null) {
+          coreStats_ = new global::Grpc.Core.Stats();
+        }
+        CoreStats.MergeFrom(other.CoreStats);
+      }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -321,6 +353,13 @@ namespace Grpc.Testing {
             CqPollCount = input.ReadUInt64();
             break;
           }
+          case 58: {
+            if (coreStats_ == null) {
+              coreStats_ = new global::Grpc.Core.Stats();
+            }
+            input.ReadMessage(coreStats_);
+            break;
+          }
         }
       }
     }
@@ -909,6 +948,7 @@ namespace Grpc.Testing {
       timeSystem_ = other.timeSystem_;
       requestResults_ = other.requestResults_.Clone();
       cqPollCount_ = other.cqPollCount_;
+      CoreStats = other.coreStats_ != null ? other.CoreStats.Clone() : null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -993,6 +1033,20 @@ namespace Grpc.Testing {
       }
     }
 
+    /// <summary>Field number for the "core_stats" field.</summary>
+    public const int CoreStatsFieldNumber = 7;
+    private global::Grpc.Core.Stats coreStats_;
+    /// <summary>
+    /// Core library stats
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public global::Grpc.Core.Stats CoreStats {
+      get { return coreStats_; }
+      set {
+        coreStats_ = value;
+      }
+    }
+
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public override bool Equals(object other) {
       return Equals(other as ClientStats);
@@ -1012,6 +1066,7 @@ namespace Grpc.Testing {
       if (TimeSystem != other.TimeSystem) return false;
       if(!requestResults_.Equals(other.requestResults_)) return false;
       if (CqPollCount != other.CqPollCount) return false;
+      if (!object.Equals(CoreStats, other.CoreStats)) return false;
       return true;
     }
 
@@ -1024,6 +1079,7 @@ namespace Grpc.Testing {
       if (TimeSystem != 0D) hash ^= TimeSystem.GetHashCode();
       hash ^= requestResults_.GetHashCode();
       if (CqPollCount != 0UL) hash ^= CqPollCount.GetHashCode();
+      if (coreStats_ != null) hash ^= CoreStats.GetHashCode();
       return hash;
     }
 
@@ -1055,6 +1111,10 @@ namespace Grpc.Testing {
         output.WriteRawTag(48);
         output.WriteUInt64(CqPollCount);
       }
+      if (coreStats_ != null) {
+        output.WriteRawTag(58);
+        output.WriteMessage(CoreStats);
+      }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -1076,6 +1136,9 @@ namespace Grpc.Testing {
       if (CqPollCount != 0UL) {
         size += 1 + pb::CodedOutputStream.ComputeUInt64Size(CqPollCount);
       }
+      if (coreStats_ != null) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(CoreStats);
+      }
       return size;
     }
 
@@ -1103,6 +1166,12 @@ namespace Grpc.Testing {
       if (other.CqPollCount != 0UL) {
         CqPollCount = other.CqPollCount;
       }
+      if (other.coreStats_ != null) {
+        if (coreStats_ == null) {
+          coreStats_ = new global::Grpc.Core.Stats();
+        }
+        CoreStats.MergeFrom(other.CoreStats);
+      }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -1140,6 +1209,13 @@ namespace Grpc.Testing {
             CqPollCount = input.ReadUInt64();
             break;
           }
+          case 58: {
+            if (coreStats_ == null) {
+              coreStats_ = new global::Grpc.Core.Stats();
+            }
+            input.ReadMessage(coreStats_);
+            break;
+          }
         }
       }
     }
diff --git a/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs b/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
index b419dd1702..c0d147c150 100644
--- a/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
@@ -1,5 +1,7 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: src/proto/grpc/testing/test.proto
+// <auto-generated>
+//     Generated by the protocol buffer compiler.  DO NOT EDIT!
+//     source: src/proto/grpc/testing/test.proto
+// </auto-generated>
 // Original file comments:
 // Copyright 2015-2016 gRPC authors.
 //
diff --git a/src/csharp/Grpc.Microbenchmarks/CompletionRegistryBenchmark.cs b/src/csharp/Grpc.Microbenchmarks/CompletionRegistryBenchmark.cs
index eefdb50e39..bb57a6968f 100644
--- a/src/csharp/Grpc.Microbenchmarks/CompletionRegistryBenchmark.cs
+++ b/src/csharp/Grpc.Microbenchmarks/CompletionRegistryBenchmark.cs
@@ -43,7 +43,7 @@ namespace Grpc.Microbenchmarks
         public void Run(int threadCount, int iterations, bool useSharedRegistry)
         {
             Console.WriteLine(string.Format("CompletionRegistryBenchmark: threads={0}, iterations={1}, useSharedRegistry={2}", threadCount, iterations, useSharedRegistry));
-            CompletionRegistry sharedRegistry = useSharedRegistry ? new CompletionRegistry(environment, () => BatchContextSafeHandle.Create()) : null;
+            CompletionRegistry sharedRegistry = useSharedRegistry ? new CompletionRegistry(environment, () => BatchContextSafeHandle.Create(), () => RequestCallContextSafeHandle.Create()) : null;
             var threadedBenchmark = new ThreadedBenchmark(threadCount, () => ThreadBody(iterations, sharedRegistry));
             threadedBenchmark.Run();
             // TODO: parametrize by number of pending completions
@@ -51,7 +51,7 @@ namespace Grpc.Microbenchmarks
 
         private void ThreadBody(int iterations, CompletionRegistry optionalSharedRegistry)
         {
-            var completionRegistry = optionalSharedRegistry ?? new CompletionRegistry(environment, () => BatchContextSafeHandle.Create());
+            var completionRegistry = optionalSharedRegistry ?? new CompletionRegistry(environment, () => throw new NotImplementedException(), () => throw new NotImplementedException());
             var ctx = BatchContextSafeHandle.Create();
   
             var stopwatch = Stopwatch.StartNew();
diff --git a/src/csharp/Grpc.Microbenchmarks/SendMessageBenchmark.cs b/src/csharp/Grpc.Microbenchmarks/SendMessageBenchmark.cs
index da4f35ff96..390c062298 100644
--- a/src/csharp/Grpc.Microbenchmarks/SendMessageBenchmark.cs
+++ b/src/csharp/Grpc.Microbenchmarks/SendMessageBenchmark.cs
@@ -52,7 +52,7 @@ namespace Grpc.Microbenchmarks
 
         private void ThreadBody(int iterations, int payloadSize)
         {
-            var completionRegistry = new CompletionRegistry(environment, () => environment.BatchContextPool.Lease());
+            var completionRegistry = new CompletionRegistry(environment, () => environment.BatchContextPool.Lease(), () => throw new NotImplementedException());
             var cq = CompletionQueueSafeHandle.CreateAsync(completionRegistry);
             var call = CreateFakeCall(cq);
 
diff --git a/src/csharp/Grpc.Reflection/Reflection.cs b/src/csharp/Grpc.Reflection/Reflection.cs
index 86e9aace8c..60090e5364 100644
--- a/src/csharp/Grpc.Reflection/Reflection.cs
+++ b/src/csharp/Grpc.Reflection/Reflection.cs
@@ -345,7 +345,10 @@ namespace Grpc.Reflection.V1Alpha {
           FileContainingSymbol = other.FileContainingSymbol;
           break;
         case MessageRequestOneofCase.FileContainingExtension:
-          FileContainingExtension = other.FileContainingExtension;
+          if (FileContainingExtension == null) {
+            FileContainingExtension = new global::Grpc.Reflection.V1Alpha.ExtensionRequest();
+          }
+          FileContainingExtension.MergeFrom(other.FileContainingExtension);
           break;
         case MessageRequestOneofCase.AllExtensionNumbersOfType:
           AllExtensionNumbersOfType = other.AllExtensionNumbersOfType;
@@ -816,16 +819,28 @@ namespace Grpc.Reflection.V1Alpha {
       }
       switch (other.MessageResponseCase) {
         case MessageResponseOneofCase.FileDescriptorResponse:
-          FileDescriptorResponse = other.FileDescriptorResponse;
+          if (FileDescriptorResponse == null) {
+            FileDescriptorResponse = new global::Grpc.Reflection.V1Alpha.FileDescriptorResponse();
+          }
+          FileDescriptorResponse.MergeFrom(other.FileDescriptorResponse);
           break;
         case MessageResponseOneofCase.AllExtensionNumbersResponse:
-          AllExtensionNumbersResponse = other.AllExtensionNumbersResponse;
+          if (AllExtensionNumbersResponse == null) {
+            AllExtensionNumbersResponse = new global::Grpc.Reflection.V1Alpha.ExtensionNumberResponse();
+          }
+          AllExtensionNumbersResponse.MergeFrom(other.AllExtensionNumbersResponse);
           break;
         case MessageResponseOneofCase.ListServicesResponse:
-          ListServicesResponse = other.ListServicesResponse;
+          if (ListServicesResponse == null) {
+            ListServicesResponse = new global::Grpc.Reflection.V1Alpha.ListServiceResponse();
+          }
+          ListServicesResponse.MergeFrom(other.ListServicesResponse);
           break;
         case MessageResponseOneofCase.ErrorResponse:
-          ErrorResponse = other.ErrorResponse;
+          if (ErrorResponse == null) {
+            ErrorResponse = new global::Grpc.Reflection.V1Alpha.ErrorResponse();
+          }
+          ErrorResponse.MergeFrom(other.ErrorResponse);
           break;
       }
 
diff --git a/src/csharp/Grpc.Reflection/ReflectionGrpc.cs b/src/csharp/Grpc.Reflection/ReflectionGrpc.cs
index 58439577e3..0195186eba 100644
--- a/src/csharp/Grpc.Reflection/ReflectionGrpc.cs
+++ b/src/csharp/Grpc.Reflection/ReflectionGrpc.cs
@@ -1,5 +1,7 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: grpc/reflection/v1alpha/reflection.proto
+// <auto-generated>
+//     Generated by the protocol buffer compiler.  DO NOT EDIT!
+//     source: grpc/reflection/v1alpha/reflection.proto
+// </auto-generated>
 // Original file comments:
 // Copyright 2016 gRPC authors.
 //
diff --git a/src/csharp/ext/grpc_csharp_ext.c b/src/csharp/ext/grpc_csharp_ext.c
index 24d779e1e5..6875d40aa0 100644
--- a/src/csharp/ext/grpc_csharp_ext.c
+++ b/src/csharp/ext/grpc_csharp_ext.c
@@ -226,17 +226,22 @@ grpcsharp_batch_context_destroy(grpcsharp_batch_context* ctx) {
 }
 
 GPR_EXPORT void GPR_CALLTYPE
-grpcsharp_request_call_context_destroy(grpcsharp_request_call_context* ctx) {
-  if (!ctx) {
-    return;
-  }
+grpcsharp_request_call_context_reset(grpcsharp_request_call_context* ctx) {
   /* NOTE: ctx->server_rpc_new.call is not destroyed because callback handler is
      supposed
      to take its ownership. */
 
   grpc_call_details_destroy(&(ctx->call_details));
   grpcsharp_metadata_array_destroy_metadata_only(&(ctx->request_metadata));
+  memset(ctx, 0, sizeof(grpcsharp_request_call_context));
+}
 
+GPR_EXPORT void GPR_CALLTYPE
+grpcsharp_request_call_context_destroy(grpcsharp_request_call_context* ctx) {
+  if (!ctx) {
+    return;
+  }
+  grpcsharp_request_call_context_reset(ctx);
   gpr_free(ctx);
 }
 
diff --git a/src/csharp/tests.json b/src/csharp/tests.json
index 82573edecb..469328af1a 100644
--- a/src/csharp/tests.json
+++ b/src/csharp/tests.json
@@ -14,6 +14,7 @@
     "Grpc.Core.Tests.CallCancellationTest",
     "Grpc.Core.Tests.CallCredentialsTest",
     "Grpc.Core.Tests.CallOptionsTest",
+    "Grpc.Core.Tests.ChannelConnectivityTest",
     "Grpc.Core.Tests.ChannelCredentialsTest",
     "Grpc.Core.Tests.ChannelOptionsTest",
     "Grpc.Core.Tests.ChannelTest",
diff --git a/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.mm b/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.mm
index d5e668a858..d130971364 100644
--- a/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.mm
+++ b/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.mm
@@ -110,13 +110,12 @@ static void chttp2_tear_down_secure_fullstack(grpc_end2end_test_fixture *f) {
 
 static void cronet_init_client_simple_ssl_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *client_args) {
-  grpc_exec_ctx ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   stream_engine *cronetEngine = [Cronet getGlobalEngine];
 
   grpc_channel_args *new_client_args = grpc_channel_args_copy(client_args);
   cronet_init_client_secure_fullstack(f, new_client_args, cronetEngine);
-  grpc_channel_args_destroy(&ctx, new_client_args);
-  grpc_exec_ctx_finish(&ctx);
+  grpc_channel_args_destroy(new_client_args);
 }
 
 static int fail_server_auth_check(grpc_channel_args *server_args) {
diff --git a/src/objective-c/tests/run_tests.sh b/src/objective-c/tests/run_tests.sh
index 62c4e10b99..cf0b07e8c0 100755
--- a/src/objective-c/tests/run_tests.sh
+++ b/src/objective-c/tests/run_tests.sh
@@ -34,6 +34,19 @@ $BINDIR/interop_server --port=5051 --max_send_message_size=8388608 --use_tls &
 # Kill them when this script exits.
 trap 'kill -9 `jobs -p` ; echo "EXIT TIME:  $(date)"' EXIT
 
+# Boot Xcode first with several retries since Xcode might fail due to a bug:
+# http://www.openradar.me/29785686
+xcrun simctl list | egrep 'iPhone 6 \('
+udid=`xcrun simctl list | egrep 'iPhone 6 \(.*\) \(.*\)' | sed -E 's/ *iPhone 6 \(([^\)]*)\).*/\1/g' | head -n 1`
+retries=0
+while [ $retries -lt 3 ] && ! open -a Simulator --args -CurrentDeviceUDID $udid ; do
+retries=$(($retries+1))
+done
+if [ $retries == 3 ]; then
+  echo "Xcode simulator failed to start after 3 retries."
+  exit 1
+fi
+
 # xcodebuild is very verbose. We filter its output and tell Bash to fail if any
 # element of the pipe fails.
 # TODO(jcanizales): Use xctool instead? Issue #2540.
diff --git a/src/php/ext/grpc/channel_credentials.c b/src/php/ext/grpc/channel_credentials.c
index 86e4f46c67..d120d6e90f 100644
--- a/src/php/ext/grpc/channel_credentials.c
+++ b/src/php/ext/grpc/channel_credentials.c
@@ -35,6 +35,7 @@
 #include <zend_hash.h>
 
 #include <grpc/support/alloc.h>
+#include <grpc/support/string_util.h>
 #include <grpc/grpc.h>
 #include <grpc/grpc_security.h>
 
@@ -46,10 +47,11 @@ static char *default_pem_root_certs = NULL;
 
 static grpc_ssl_roots_override_result get_ssl_roots_override(
     char **pem_root_certs) {
-  *pem_root_certs = default_pem_root_certs;
-  if (default_pem_root_certs == NULL) {
+  if (!default_pem_root_certs) {
+    *pem_root_certs = NULL;
     return GRPC_SSL_ROOTS_OVERRIDE_FAIL;
   }
+  *pem_root_certs = gpr_strdup(default_pem_root_certs);
   return GRPC_SSL_ROOTS_OVERRIDE_OK;
 }
 
@@ -101,7 +103,7 @@ PHP_METHOD(ChannelCredentials, setDefaultRootsPem) {
                          "setDefaultRootsPem expects 1 string", 1 TSRMLS_CC);
     return;
   }
-  default_pem_root_certs = gpr_malloc((pem_roots_length + 1) * sizeof(char));
+  default_pem_root_certs = gpr_realloc(default_pem_root_certs, (pem_roots_length + 1) * sizeof(char));
   memcpy(default_pem_root_certs, pem_roots, pem_roots_length + 1);
 }
 
diff --git a/src/proto/grpc/lb/v1/load_balancer.proto b/src/proto/grpc/lb/v1/load_balancer.proto
index 0a33568bd6..75c916defa 100644
--- a/src/proto/grpc/lb/v1/load_balancer.proto
+++ b/src/proto/grpc/lb/v1/load_balancer.proto
@@ -133,11 +133,8 @@ message ServerList {
   // unless instructed otherwise via the client_config.
   repeated Server servers = 1;
 
-  // Indicates the amount of time that the client should consider this server
-  // list as valid. It may be considered stale after waiting this interval of
-  // time after receiving the list. If the interval is not positive, the
-  // client can assume the list is valid until the next list is received.
-  Duration expiration_interval = 3;
+  // Was google.protobuf.Duration expiration_interval.
+  reserved 3;
 }
 
 // Contains server information. When the drop field is not true, use the other
diff --git a/src/python/grpcio/grpc/__init__.py b/src/python/grpcio/grpc/__init__.py
index 564772527e..8b913ac949 100644
--- a/src/python/grpcio/grpc/__init__.py
+++ b/src/python/grpcio/grpc/__init__.py
@@ -342,6 +342,170 @@ class Call(six.with_metaclass(abc.ABCMeta, RpcContext)):
         raise NotImplementedError()
 
 
+##############  Invocation-Side Interceptor Interfaces & Classes  ##############
+
+
+class ClientCallDetails(six.with_metaclass(abc.ABCMeta)):
+    """Describes an RPC to be invoked.
+
+    This is an EXPERIMENTAL API.
+
+    Attributes:
+      method: The method name of the RPC.
+      timeout: An optional duration of time in seconds to allow for the RPC.
+      metadata: Optional :term:`metadata` to be transmitted to
+        the service-side of the RPC.
+      credentials: An optional CallCredentials for the RPC.
+    """
+
+
+class UnaryUnaryClientInterceptor(six.with_metaclass(abc.ABCMeta)):
+    """Affords intercepting unary-unary invocations.
+
+    This is an EXPERIMENTAL API.
+    """
+
+    @abc.abstractmethod
+    def intercept_unary_unary(self, continuation, client_call_details, request):
+        """Intercepts a unary-unary invocation asynchronously.
+
+        Args:
+          continuation: A function that proceeds with the invocation by
+            executing the next interceptor in chain or invoking the
+            actual RPC on the underlying Channel. It is the interceptor's
+            responsibility to call it if it decides to move the RPC forward.
+            The interceptor can use
+            `response_future = continuation(client_call_details, request)`
+            to continue with the RPC. `continuation` returns an object that is
+            both a Call for the RPC and a Future. In the event of RPC
+            completion, the return Call-Future's result value will be
+            the response message of the RPC. Should the event terminate
+            with non-OK status, the returned Call-Future's exception value
+            will be an RpcError.
+          client_call_details: A ClientCallDetails object describing the
+            outgoing RPC.
+          request: The request value for the RPC.
+
+        Returns:
+            An object that is both a Call for the RPC and a Future.
+            In the event of RPC completion, the return Call-Future's
+            result value will be the response message of the RPC.
+            Should the event terminate with non-OK status, the returned
+            Call-Future's exception value will be an RpcError.
+        """
+        raise NotImplementedError()
+
+
+class UnaryStreamClientInterceptor(six.with_metaclass(abc.ABCMeta)):
+    """Affords intercepting unary-stream invocations.
+
+    This is an EXPERIMENTAL API.
+    """
+
+    @abc.abstractmethod
+    def intercept_unary_stream(self, continuation, client_call_details,
+                               request):
+        """Intercepts a unary-stream invocation.
+
+        Args:
+          continuation: A function that proceeds with the invocation by
+            executing the next interceptor in chain or invoking the
+            actual RPC on the underlying Channel. It is the interceptor's
+            responsibility to call it if it decides to move the RPC forward.
+            The interceptor can use
+            `response_iterator = continuation(client_call_details, request)`
+            to continue with the RPC. `continuation` returns an object that is
+            both a Call for the RPC and an iterator for response values.
+            Drawing response values from the returned Call-iterator may
+            raise RpcError indicating termination of the RPC with non-OK
+            status.
+          client_call_details: A ClientCallDetails object describing the
+            outgoing RPC.
+          request: The request value for the RPC.
+
+        Returns:
+            An object that is both a Call for the RPC and an iterator of
+            response values. Drawing response values from the returned
+            Call-iterator may raise RpcError indicating termination of
+            the RPC with non-OK status.
+        """
+        raise NotImplementedError()
+
+
+class StreamUnaryClientInterceptor(six.with_metaclass(abc.ABCMeta)):
+    """Affords intercepting stream-unary invocations.
+
+    This is an EXPERIMENTAL API.
+    """
+
+    @abc.abstractmethod
+    def intercept_stream_unary(self, continuation, client_call_details,
+                               request_iterator):
+        """Intercepts a stream-unary invocation asynchronously.
+
+        Args:
+          continuation: A function that proceeds with the invocation by
+            executing the next interceptor in chain or invoking the
+            actual RPC on the underlying Channel. It is the interceptor's
+            responsibility to call it if it decides to move the RPC forward.
+            The interceptor can use
+            `response_future = continuation(client_call_details,
+                                            request_iterator)`
+            to continue with the RPC. `continuation` returns an object that is
+            both a Call for the RPC and a Future. In the event of RPC completion,
+            the return Call-Future's result value will be the response message
+            of the RPC. Should the event terminate with non-OK status, the
+            returned Call-Future's exception value will be an RpcError.
+          client_call_details: A ClientCallDetails object describing the
+            outgoing RPC.
+          request_iterator: An iterator that yields request values for the RPC.
+
+        Returns:
+            An object that is both a Call for the RPC and a Future.
+            In the event of RPC completion, the return Call-Future's
+            result value will be the response message of the RPC.
+            Should the event terminate with non-OK status, the returned
+            Call-Future's exception value will be an RpcError.
+        """
+        raise NotImplementedError()
+
+
+class StreamStreamClientInterceptor(six.with_metaclass(abc.ABCMeta)):
+    """Affords intercepting stream-stream invocations.
+
+    This is an EXPERIMENTAL API.
+    """
+
+    @abc.abstractmethod
+    def intercept_stream_stream(self, continuation, client_call_details,
+                                request_iterator):
+        """Intercepts a stream-stream invocation.
+
+          continuation: A function that proceeds with the invocation by
+            executing the next interceptor in chain or invoking the
+            actual RPC on the underlying Channel. It is the interceptor's
+            responsibility to call it if it decides to move the RPC forward.
+            The interceptor can use
+            `response_iterator = continuation(client_call_details,
+                                              request_iterator)`
+            to continue with the RPC. `continuation` returns an object that is
+            both a Call for the RPC and an iterator for response values.
+            Drawing response values from the returned Call-iterator may
+            raise RpcError indicating termination of the RPC with non-OK
+            status.
+          client_call_details: A ClientCallDetails object describing the
+            outgoing RPC.
+          request_iterator: An iterator that yields request values for the RPC.
+
+        Returns:
+            An object that is both a Call for the RPC and an iterator of
+            response values. Drawing response values from the returned
+            Call-iterator may raise RpcError indicating termination of
+            the RPC with non-OK status.
+        """
+        raise NotImplementedError()
+
+
 ############  Authentication & Authorization Interfaces & Classes  #############
 
 
@@ -835,27 +999,47 @@ class ServicerContext(six.with_metaclass(abc.ABCMeta, RpcContext)):
         raise NotImplementedError()
 
     @abc.abstractmethod
+    def abort(self, code, details):
+        """Raises an exception to terminate the RPC with a non-OK status.
+
+        The code and details passed as arguments will supercede any existing
+        ones.
+
+        Args:
+          code: A StatusCode object to be sent to the client.
+            It must not be StatusCode.OK.
+          details: An ASCII-encodable string to be sent to the client upon
+            termination of the RPC.
+
+        Raises:
+          Exception: An exception is always raised to signal the abortion the
+            RPC to the gRPC runtime.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
     def set_code(self, code):
         """Sets the value to be used as status code upon RPC completion.
 
-    This method need not be called by method implementations if they wish the
-    gRPC runtime to determine the status code of the RPC.
+        This method need not be called by method implementations if they wish
+        the gRPC runtime to determine the status code of the RPC.
 
-    Args:
-      code: A StatusCode object to be sent to the client.
-    """
+        Args:
+          code: A StatusCode object to be sent to the client.
+        """
         raise NotImplementedError()
 
     @abc.abstractmethod
     def set_details(self, details):
         """Sets the value to be used as detail string upon RPC completion.
 
-    This method need not be called by method implementations if they have no
-    details to transmit.
+        This method need not be called by method implementations if they have
+        no details to transmit.
 
-    Args:
-      details: An arbitrary string to be sent to the client upon completion.
-    """
+        Args:
+          details: An ASCII-encodable string to be sent to the client upon
+            termination of the RPC.
+        """
         raise NotImplementedError()
 
 
@@ -942,6 +1126,34 @@ class ServiceRpcHandler(six.with_metaclass(abc.ABCMeta, GenericRpcHandler)):
         raise NotImplementedError()
 
 
+####################  Service-Side Interceptor Interfaces  #####################
+
+
+class ServerInterceptor(six.with_metaclass(abc.ABCMeta)):
+    """Affords intercepting incoming RPCs on the service-side.
+
+    This is an EXPERIMENTAL API.
+    """
+
+    @abc.abstractmethod
+    def intercept_service(self, continuation, handler_call_details):
+        """Intercepts incoming RPCs before handing them over to a handler.
+
+        Args:
+          continuation: A function that takes a HandlerCallDetails and
+            proceeds to invoke the next interceptor in the chain, if any,
+            or the RPC handler lookup logic, with the call details passed
+            as an argument, and returns an RpcMethodHandler instance if
+            the RPC is considered serviced, or None otherwise.
+          handler_call_details: A HandlerCallDetails describing the RPC.
+
+        Returns:
+          An RpcMethodHandler with which the RPC may be serviced if the
+          interceptor chooses to service this RPC, or None otherwise.
+        """
+        raise NotImplementedError()
+
+
 #############################  Server Interface  ###############################
 
 
@@ -1356,53 +1568,88 @@ def secure_channel(target, credentials, options=None):
                             credentials._credentials)
 
 
+def intercept_channel(channel, *interceptors):
+    """Intercepts a channel through a set of interceptors.
+
+    This is an EXPERIMENTAL API.
+
+    Args:
+      channel: A Channel.
+      interceptors: Zero or more objects of type
+        UnaryUnaryClientInterceptor,
+        UnaryStreamClientInterceptor,
+        StreamUnaryClientInterceptor, or
+        StreamStreamClientInterceptor.
+        Interceptors are given control in the order they are listed.
+
+    Returns:
+      A Channel that intercepts each invocation via the provided interceptors.
+
+    Raises:
+      TypeError: If interceptor does not derive from any of
+        UnaryUnaryClientInterceptor,
+        UnaryStreamClientInterceptor,
+        StreamUnaryClientInterceptor, or
+        StreamStreamClientInterceptor.
+    """
+    from grpc import _interceptor  # pylint: disable=cyclic-import
+    return _interceptor.intercept_channel(channel, *interceptors)
+
+
 def server(thread_pool,
            handlers=None,
+           interceptors=None,
            options=None,
            maximum_concurrent_rpcs=None):
     """Creates a Server with which RPCs can be serviced.
 
-  Args:
-    thread_pool: A futures.ThreadPoolExecutor to be used by the Server
-      to execute RPC handlers.
-    handlers: An optional list of GenericRpcHandlers used for executing RPCs.
-      More handlers may be added by calling add_generic_rpc_handlers any time
-      before the server is started.
-    options: An optional list of key-value pairs (channel args in gRPC runtime)
-    to configure the channel.
-    maximum_concurrent_rpcs: The maximum number of concurrent RPCs this server
-      will service before returning RESOURCE_EXHAUSTED status, or None to
-      indicate no limit.
+    Args:
+      thread_pool: A futures.ThreadPoolExecutor to be used by the Server
+        to execute RPC handlers.
+      handlers: An optional list of GenericRpcHandlers used for executing RPCs.
+        More handlers may be added by calling add_generic_rpc_handlers any time
+        before the server is started.
+      interceptors: An optional list of ServerInterceptor objects that observe
+        and optionally manipulate the incoming RPCs before handing them over to
+        handlers. The interceptors are given control in the order they are
+        specified. This is an EXPERIMENTAL API.
+      options: An optional list of key-value pairs (channel args in gRPC runtime)
+      to configure the channel.
+      maximum_concurrent_rpcs: The maximum number of concurrent RPCs this server
+        will service before returning RESOURCE_EXHAUSTED status, or None to
+        indicate no limit.
 
-  Returns:
-    A Server object.
-  """
+    Returns:
+      A Server object.
+    """
     from grpc import _server  # pylint: disable=cyclic-import
     return _server.Server(thread_pool, () if handlers is None else handlers, ()
-                          if options is None else options,
-                          maximum_concurrent_rpcs)
+                          if interceptors is None else interceptors, () if
+                          options is None else options, maximum_concurrent_rpcs)
 
 
 ###################################  __all__  #################################
 
-__all__ = ('FutureTimeoutError', 'FutureCancelledError', 'Future',
-           'ChannelConnectivity', 'StatusCode', 'RpcError', 'RpcContext',
-           'Call', 'ChannelCredentials', 'CallCredentials',
-           'AuthMetadataContext', 'AuthMetadataPluginCallback',
-           'AuthMetadataPlugin', 'ServerCertificateConfiguration',
-           'ServerCredentials', 'UnaryUnaryMultiCallable',
-           'UnaryStreamMultiCallable', 'StreamUnaryMultiCallable',
-           'StreamStreamMultiCallable', 'Channel', 'ServicerContext',
-           'RpcMethodHandler', 'HandlerCallDetails', 'GenericRpcHandler',
-           'ServiceRpcHandler', 'Server', 'unary_unary_rpc_method_handler',
-           'unary_stream_rpc_method_handler', 'stream_unary_rpc_method_handler',
-           'stream_stream_rpc_method_handler',
-           'method_handlers_generic_handler', 'ssl_channel_credentials',
-           'metadata_call_credentials', 'access_token_call_credentials',
-           'composite_call_credentials', 'composite_channel_credentials',
-           'ssl_server_credentials', 'ssl_server_certificate_configuration',
-           'dynamic_ssl_server_credentials', 'channel_ready_future',
-           'insecure_channel', 'secure_channel', 'server',)
+__all__ = (
+    'FutureTimeoutError', 'FutureCancelledError', 'Future',
+    'ChannelConnectivity', 'StatusCode', 'RpcError', 'RpcContext', 'Call',
+    'ChannelCredentials', 'CallCredentials', 'AuthMetadataContext',
+    'AuthMetadataPluginCallback', 'AuthMetadataPlugin', 'ClientCallDetails',
+    'ServerCertificateConfiguration', 'ServerCredentials',
+    'UnaryUnaryMultiCallable', 'UnaryStreamMultiCallable',
+    'StreamUnaryMultiCallable', 'StreamStreamMultiCallable',
+    'UnaryUnaryClientInterceptor', 'UnaryStreamClientInterceptor',
+    'StreamUnaryClientInterceptor', 'StreamStreamClientInterceptor', 'Channel',
+    'ServicerContext', 'RpcMethodHandler', 'HandlerCallDetails',
+    'GenericRpcHandler', 'ServiceRpcHandler', 'Server', 'ServerInterceptor',
+    'unary_unary_rpc_method_handler', 'unary_stream_rpc_method_handler',
+    'stream_unary_rpc_method_handler', 'stream_stream_rpc_method_handler',
+    'method_handlers_generic_handler', 'ssl_channel_credentials',
+    'metadata_call_credentials', 'access_token_call_credentials',
+    'composite_call_credentials', 'composite_channel_credentials',
+    'ssl_server_credentials', 'ssl_server_certificate_configuration',
+    'dynamic_ssl_server_credentials', 'channel_ready_future',
+    'insecure_channel', 'secure_channel', 'intercept_channel', 'server',)
 
 ############################### Extension Shims ################################
 
diff --git a/src/python/grpcio/grpc/_channel.py b/src/python/grpcio/grpc/_channel.py
index cf4ce0941b..d7456a3dd1 100644
--- a/src/python/grpcio/grpc/_channel.py
+++ b/src/python/grpcio/grpc/_channel.py
@@ -122,8 +122,8 @@ def _abort(state, code, details):
         state.code = code
         state.details = details
         if state.initial_metadata is None:
-            state.initial_metadata = _common.EMPTY_METADATA
-        state.trailing_metadata = _common.EMPTY_METADATA
+            state.initial_metadata = ()
+        state.trailing_metadata = ()
 
 
 def _handle_event(event, state, response_deserializer):
@@ -202,8 +202,7 @@ def _consume_request_iterator(request_iterator, state, call,
                     else:
                         operations = (cygrpc.operation_send_message(
                             serialized_request, _EMPTY_FLAGS),)
-                        call.start_client_batch(
-                            cygrpc.Operations(operations), event_handler)
+                        call.start_client_batch(operations, event_handler)
                         state.due.add(cygrpc.OperationType.send_message)
                         while True:
                             state.condition.wait()
@@ -218,8 +217,7 @@ def _consume_request_iterator(request_iterator, state, call,
             if state.code is None:
                 operations = (
                     cygrpc.operation_send_close_from_client(_EMPTY_FLAGS),)
-                call.start_client_batch(
-                    cygrpc.Operations(operations), event_handler)
+                call.start_client_batch(operations, event_handler)
                 state.due.add(cygrpc.OperationType.send_close_from_client)
 
     def stop_consumption_thread(timeout):  # pylint: disable=unused-argument
@@ -321,8 +319,7 @@ class _Rendezvous(grpc.RpcError, grpc.Future, grpc.Call):
                 event_handler = _event_handler(self._state, self._call,
                                                self._response_deserializer)
                 self._call.start_client_batch(
-                    cygrpc.Operations(
-                        (cygrpc.operation_receive_message(_EMPTY_FLAGS),)),
+                    (cygrpc.operation_receive_message(_EMPTY_FLAGS),),
                     event_handler)
                 self._state.due.add(cygrpc.OperationType.receive_message)
             elif self._state.code is grpc.StatusCode.OK:
@@ -372,14 +369,13 @@ class _Rendezvous(grpc.RpcError, grpc.Future, grpc.Call):
         with self._state.condition:
             while self._state.initial_metadata is None:
                 self._state.condition.wait()
-            return _common.to_application_metadata(self._state.initial_metadata)
+            return self._state.initial_metadata
 
     def trailing_metadata(self):
         with self._state.condition:
             while self._state.trailing_metadata is None:
                 self._state.condition.wait()
-            return _common.to_application_metadata(
-                self._state.trailing_metadata)
+            return self._state.trailing_metadata
 
     def code(self):
         with self._state.condition:
@@ -420,8 +416,7 @@ def _start_unary_request(request, timeout, request_serializer):
     deadline, deadline_timespec = _deadline(timeout)
     serialized_request = _common.serialize(request, request_serializer)
     if serialized_request is None:
-        state = _RPCState((), _common.EMPTY_METADATA, _common.EMPTY_METADATA,
-                          grpc.StatusCode.INTERNAL,
+        state = _RPCState((), (), (), grpc.StatusCode.INTERNAL,
                           'Exception serializing request!')
         rendezvous = _Rendezvous(state, None, None, deadline)
         return deadline, deadline_timespec, None, rendezvous
@@ -458,8 +453,7 @@ class _UnaryUnaryMultiCallable(grpc.UnaryUnaryMultiCallable):
         else:
             state = _RPCState(_UNARY_UNARY_INITIAL_DUE, None, None, None, None)
             operations = (
-                cygrpc.operation_send_initial_metadata(
-                    _common.to_cygrpc_metadata(metadata), _EMPTY_FLAGS),
+                cygrpc.operation_send_initial_metadata(metadata, _EMPTY_FLAGS),
                 cygrpc.operation_send_message(serialized_request, _EMPTY_FLAGS),
                 cygrpc.operation_send_close_from_client(_EMPTY_FLAGS),
                 cygrpc.operation_receive_initial_metadata(_EMPTY_FLAGS),
@@ -479,8 +473,7 @@ class _UnaryUnaryMultiCallable(grpc.UnaryUnaryMultiCallable):
                                              deadline_timespec)
             if credentials is not None:
                 call.set_credentials(credentials._credentials)
-            call_error = call.start_client_batch(
-                cygrpc.Operations(operations), None)
+            call_error = call.start_client_batch(operations, None)
             _check_call_error(call_error, metadata)
             _handle_event(completion_queue.poll(), state,
                           self._response_deserializer)
@@ -509,8 +502,7 @@ class _UnaryUnaryMultiCallable(grpc.UnaryUnaryMultiCallable):
             event_handler = _event_handler(state, call,
                                            self._response_deserializer)
             with state.condition:
-                call_error = call.start_client_batch(
-                    cygrpc.Operations(operations), event_handler)
+                call_error = call.start_client_batch(operations, event_handler)
                 if call_error != cygrpc.CallError.ok:
                     _call_error_set_RPCstate(state, call_error, metadata)
                     return _Rendezvous(state, None, None, deadline)
@@ -544,18 +536,15 @@ class _UnaryStreamMultiCallable(grpc.UnaryStreamMultiCallable):
                                            self._response_deserializer)
             with state.condition:
                 call.start_client_batch(
-                    cygrpc.Operations((
-                        cygrpc.operation_receive_initial_metadata(_EMPTY_FLAGS),
-                    )), event_handler)
+                    (cygrpc.operation_receive_initial_metadata(_EMPTY_FLAGS),),
+                    event_handler)
                 operations = (
                     cygrpc.operation_send_initial_metadata(
-                        _common.to_cygrpc_metadata(metadata),
-                        _EMPTY_FLAGS), cygrpc.operation_send_message(
+                        metadata, _EMPTY_FLAGS), cygrpc.operation_send_message(
                             serialized_request, _EMPTY_FLAGS),
                     cygrpc.operation_send_close_from_client(_EMPTY_FLAGS),
                     cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),)
-                call_error = call.start_client_batch(
-                    cygrpc.Operations(operations), event_handler)
+                call_error = call.start_client_batch(operations, event_handler)
                 if call_error != cygrpc.CallError.ok:
                     _call_error_set_RPCstate(state, call_error, metadata)
                     return _Rendezvous(state, None, None, deadline)
@@ -584,16 +573,13 @@ class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
             call.set_credentials(credentials._credentials)
         with state.condition:
             call.start_client_batch(
-                cygrpc.Operations(
-                    (cygrpc.operation_receive_initial_metadata(_EMPTY_FLAGS),)),
+                (cygrpc.operation_receive_initial_metadata(_EMPTY_FLAGS),),
                 None)
             operations = (
-                cygrpc.operation_send_initial_metadata(
-                    _common.to_cygrpc_metadata(metadata), _EMPTY_FLAGS),
+                cygrpc.operation_send_initial_metadata(metadata, _EMPTY_FLAGS),
                 cygrpc.operation_receive_message(_EMPTY_FLAGS),
                 cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),)
-            call_error = call.start_client_batch(
-                cygrpc.Operations(operations), None)
+            call_error = call.start_client_batch(operations, None)
             _check_call_error(call_error, metadata)
             _consume_request_iterator(request_iterator, state, call,
                                       self._request_serializer)
@@ -638,16 +624,13 @@ class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
         event_handler = _event_handler(state, call, self._response_deserializer)
         with state.condition:
             call.start_client_batch(
-                cygrpc.Operations(
-                    (cygrpc.operation_receive_initial_metadata(_EMPTY_FLAGS),)),
+                (cygrpc.operation_receive_initial_metadata(_EMPTY_FLAGS),),
                 event_handler)
             operations = (
-                cygrpc.operation_send_initial_metadata(
-                    _common.to_cygrpc_metadata(metadata), _EMPTY_FLAGS),
+                cygrpc.operation_send_initial_metadata(metadata, _EMPTY_FLAGS),
                 cygrpc.operation_receive_message(_EMPTY_FLAGS),
                 cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),)
-            call_error = call.start_client_batch(
-                cygrpc.Operations(operations), event_handler)
+            call_error = call.start_client_batch(operations, event_handler)
             if call_error != cygrpc.CallError.ok:
                 _call_error_set_RPCstate(state, call_error, metadata)
                 return _Rendezvous(state, None, None, deadline)
@@ -681,15 +664,12 @@ class _StreamStreamMultiCallable(grpc.StreamStreamMultiCallable):
         event_handler = _event_handler(state, call, self._response_deserializer)
         with state.condition:
             call.start_client_batch(
-                cygrpc.Operations(
-                    (cygrpc.operation_receive_initial_metadata(_EMPTY_FLAGS),)),
+                (cygrpc.operation_receive_initial_metadata(_EMPTY_FLAGS),),
                 event_handler)
             operations = (
-                cygrpc.operation_send_initial_metadata(
-                    _common.to_cygrpc_metadata(metadata), _EMPTY_FLAGS),
+                cygrpc.operation_send_initial_metadata(metadata, _EMPTY_FLAGS),
                 cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),)
-            call_error = call.start_client_batch(
-                cygrpc.Operations(operations), event_handler)
+            call_error = call.start_client_batch(operations, event_handler)
             if call_error != cygrpc.CallError.ok:
                 _call_error_set_RPCstate(state, call_error, metadata)
                 return _Rendezvous(state, None, None, deadline)
diff --git a/src/python/grpcio/grpc/_common.py b/src/python/grpcio/grpc/_common.py
index 740d4639db..130fc42630 100644
--- a/src/python/grpcio/grpc/_common.py
+++ b/src/python/grpcio/grpc/_common.py
@@ -22,8 +22,6 @@ import six
 import grpc
 from grpc._cython import cygrpc
 
-EMPTY_METADATA = cygrpc.Metadata(())
-
 CYGRPC_CONNECTIVITY_STATE_TO_CHANNEL_CONNECTIVITY = {
     cygrpc.ConnectivityState.idle:
     grpc.ChannelConnectivity.IDLE,
@@ -91,21 +89,6 @@ def channel_args(options):
     return cygrpc.ChannelArgs(cygrpc_args)
 
 
-def to_cygrpc_metadata(application_metadata):
-    return EMPTY_METADATA if application_metadata is None else cygrpc.Metadata(
-        cygrpc.Metadatum(encode(key), encode(value))
-        for key, value in application_metadata)
-
-
-def to_application_metadata(cygrpc_metadata):
-    if cygrpc_metadata is None:
-        return ()
-    else:
-        return tuple((decode(key), value
-                      if key[-4:] == b'-bin' else decode(value))
-                     for key, value in cygrpc_metadata)
-
-
 def _transform(message, transformer, exception_message):
     if transformer is None:
         return message
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi
index 6b3a276097..6361669757 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi
@@ -26,20 +26,16 @@ cdef class Call:
   def _start_batch(self, operations, tag, retain_self):
     if not self.is_valid:
       raise ValueError("invalid call object cannot be used from Python")
-    cdef grpc_call_error result
-    cdef Operations cy_operations = Operations(operations)
-    cdef OperationTag operation_tag = OperationTag(tag)
+    cdef OperationTag operation_tag = OperationTag(tag, operations)
     if retain_self:
       operation_tag.operation_call = self
     else:
       operation_tag.operation_call = None
-    operation_tag.batch_operations = cy_operations
+    operation_tag.store_ops()
     cpython.Py_INCREF(operation_tag)
-    with nogil:
-      result = grpc_call_start_batch(
-          self.c_call, cy_operations.c_ops, cy_operations.c_nops,
+    return grpc_call_start_batch(
+          self.c_call, operation_tag.c_ops, operation_tag.c_nops,
           <cpython.PyObject *>operation_tag, NULL)
-    return result
 
   def start_client_batch(self, operations, tag):
     # We don't reference this call in the operations tag because
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi
index 4c397f8f64..644df674cc 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi
@@ -76,7 +76,7 @@ cdef class Channel:
   def watch_connectivity_state(
       self, grpc_connectivity_state last_observed_state,
       Timespec deadline not None, CompletionQueue queue not None, tag):
-    cdef OperationTag operation_tag = OperationTag(tag)
+    cdef OperationTag operation_tag = OperationTag(tag, None)
     cpython.Py_INCREF(operation_tag)
     with nogil:
       grpc_channel_watch_connectivity_state(
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pyx.pxi
index 237f430799..140fc357b9 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pyx.pxi
@@ -42,7 +42,7 @@ cdef class CompletionQueue:
     cdef Call operation_call = None
     cdef CallDetails request_call_details = None
     cdef object request_metadata = None
-    cdef Operations batch_operations = None
+    cdef object batch_operations = None
     if event.type == GRPC_QUEUE_TIMEOUT:
       return Event(
           event.type, False, None, None, None, None, False, None)
@@ -61,9 +61,10 @@ cdef class CompletionQueue:
         user_tag = tag.user_tag
         operation_call = tag.operation_call
         request_call_details = tag.request_call_details
-        if tag.request_metadata is not None:
-          request_metadata = tuple(tag.request_metadata)
-        batch_operations = tag.batch_operations
+        if tag.is_new_request:
+          request_metadata = _metadata(&tag._c_request_metadata)
+          grpc_metadata_array_destroy(&tag._c_request_metadata)
+        batch_operations = tag.release_ops()
         if tag.is_new_request:
           # Stuff in the tag not explicitly handled by us needs to live through
           # the life of the call
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
index 246a271893..500086f6cb 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
@@ -30,9 +30,13 @@ cdef int _get_metadata(
     grpc_metadata creds_md[GRPC_METADATA_CREDENTIALS_PLUGIN_SYNC_MAX],
     size_t *num_creds_md, grpc_status_code *status,
     const char **error_details) with gil:
-  def callback(Metadata metadata, grpc_status_code status, bytes error_details):
+  cdef size_t metadata_count
+  cdef grpc_metadata *c_metadata
+  def callback(metadata, grpc_status_code status, bytes error_details):
     if status is StatusCode.ok:
-      cb(user_data, metadata.c_metadata, metadata.c_count, status, NULL)
+      _store_c_metadata(metadata, &c_metadata, &metadata_count)
+      cb(user_data, c_metadata, metadata_count, status, NULL)
+      _release_c_metadata(c_metadata, metadata_count)
     else:
       cb(user_data, NULL, 0, status, error_details)
   args = context.service_url, context.method_name, callback,
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
index 660263fc09..6a72bbf693 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
@@ -36,13 +36,6 @@ cdef extern from "grpc/byte_buffer_reader.h":
     pass
 
 
-cdef extern from "grpc/impl/codegen/exec_ctx_fwd.h":
-
-  struct grpc_exec_ctx:
-    # We don't care about the internals
-    pass
-
-
 cdef extern from "grpc/grpc.h":
 
   ctypedef struct grpc_slice:
@@ -169,7 +162,7 @@ cdef extern from "grpc/grpc.h":
 
   ctypedef struct grpc_arg_pointer_vtable:
     void *(*copy)(void *)
-    void (*destroy)(grpc_exec_ctx *, void *)
+    void (*destroy)(void *)
     int (*cmp)(void *, void *)
 
   ctypedef struct grpc_arg_value_pointer:
@@ -524,7 +517,7 @@ cdef extern from "grpc/grpc_security.h":
 
   grpc_auth_property_iterator grpc_auth_context_property_iterator(
       const grpc_auth_context *ctx)
- 
+
   grpc_auth_property_iterator grpc_auth_context_peer_identity(
       const grpc_auth_context *ctx)
 
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/grpc_string.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/grpc_string.pyx.pxi
index c8f11f8e19..e3cad9acb3 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/grpc_string.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/grpc_string.pyx.pxi
@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import logging
+
 
 # This function will ascii encode unicode string inputs if neccesary.
 # In Python3, unicode strings are the default str type.
@@ -22,3 +24,25 @@ cdef bytes str_to_bytes(object s):
     return s.encode('ascii')
   else:
     raise TypeError('Expected bytes, str, or unicode, not {}'.format(type(s)))
+
+
+cdef bytes _encode(str native_string_or_none):
+  if native_string_or_none is None:
+    return b''
+  elif isinstance(native_string_or_none, (bytes,)):
+    return <bytes>native_string_or_none
+  elif isinstance(native_string_or_none, (unicode,)):
+    return native_string_or_none.encode('ascii')
+  else:
+    raise TypeError('Expected str, not {}'.format(type(native_string_or_none)))
+
+
+cdef str _decode(bytes bytestring):
+    if isinstance(bytestring, (str,)):
+        return <str>bytestring
+    else:
+        try:
+            return bytestring.decode('utf8')
+        except UnicodeDecodeError:
+            logging.exception('Invalid encoding on %s', bytestring)
+            return bytestring.decode('latin1')
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/metadata.pxd.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/metadata.pxd.pxi
new file mode 100644
index 0000000000..a18c365807
--- /dev/null
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/metadata.pxd.pxi
@@ -0,0 +1,26 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+cdef void _store_c_metadata(
+    metadata, grpc_metadata **c_metadata, size_t *c_count)
+
+
+cdef void _release_c_metadata(grpc_metadata *c_metadata, int count)
+
+
+cdef tuple _metadatum(grpc_slice key_slice, grpc_slice value_slice)
+
+
+cdef tuple _metadata(grpc_metadata_array *c_metadata_array)
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/metadata.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/metadata.pyx.pxi
new file mode 100644
index 0000000000..c39fef08fa
--- /dev/null
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/metadata.pyx.pxi
@@ -0,0 +1,62 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import collections
+
+
+_Metadatum = collections.namedtuple('_Metadatum', ('key', 'value',))
+
+
+cdef void _store_c_metadata(
+    metadata, grpc_metadata **c_metadata, size_t *c_count):
+  if metadata is None:
+    c_count[0] = 0
+    c_metadata[0] = NULL
+  else:
+    metadatum_count = len(metadata)
+    if metadatum_count == 0:
+      c_count[0] = 0
+      c_metadata[0] = NULL
+    else:
+      c_count[0] = metadatum_count
+      c_metadata[0] = <grpc_metadata *>gpr_malloc(
+          metadatum_count * sizeof(grpc_metadata))
+      for index, (key, value) in enumerate(metadata):
+        encoded_key = _encode(key)
+        encoded_value = value if encoded_key[-4:] == b'-bin' else _encode(value)
+        c_metadata[0][index].key = _slice_from_bytes(encoded_key)
+        c_metadata[0][index].value = _slice_from_bytes(encoded_value)
+
+
+cdef void _release_c_metadata(grpc_metadata *c_metadata, int count):
+  if 0 < count:
+    for index in range(count):
+      grpc_slice_unref(c_metadata[index].key)
+      grpc_slice_unref(c_metadata[index].value)
+    gpr_free(c_metadata)
+
+
+cdef tuple _metadatum(grpc_slice key_slice, grpc_slice value_slice):
+  cdef bytes key = _slice_bytes(key_slice)
+  cdef bytes value = _slice_bytes(value_slice)
+  return <tuple>_Metadatum(
+      _decode(key), value if key[-4:] == b'-bin' else _decode(value))
+
+
+cdef tuple _metadata(grpc_metadata_array *c_metadata_array):
+  return tuple(
+      _metadatum(
+          c_metadata_array.metadata[index].key,
+          c_metadata_array.metadata[index].value)
+      for index in range(c_metadata_array.count))
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/records.pxd.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/records.pxd.pxi
index 9c40ebf0c2..594fdb1a8b 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/records.pxd.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/records.pxd.pxi
@@ -37,10 +37,15 @@ cdef class OperationTag:
   cdef Server shutting_down_server
   cdef Call operation_call
   cdef CallDetails request_call_details
-  cdef MetadataArray request_metadata
-  cdef Operations batch_operations
+  cdef grpc_metadata_array _c_request_metadata
+  cdef grpc_op *c_ops
+  cdef size_t c_nops
+  cdef readonly object _operations
   cdef bint is_new_request
 
+  cdef void store_ops(self)
+  cdef object release_ops(self)
+
 
 cdef class Event:
 
@@ -57,7 +62,7 @@ cdef class Event:
   cdef readonly Call operation_call
 
   # For Call.start_batch
-  cdef readonly Operations batch_operations
+  cdef readonly object batch_operations
 
 
 cdef class ByteBuffer:
@@ -84,28 +89,15 @@ cdef class ChannelArgs:
   cdef list args
 
 
-cdef class Metadatum:
-
-  cdef grpc_metadata c_metadata
-  cdef void _copy_metadatum(self, grpc_metadata *destination) nogil
-
-
-cdef class Metadata:
-
-  cdef grpc_metadata *c_metadata
-  cdef readonly size_t c_count
-
-
-cdef class MetadataArray:
-
-  cdef grpc_metadata_array c_metadata_array
-
-
 cdef class Operation:
 
   cdef grpc_op c_op
+  cdef bint _c_metadata_needs_release
+  cdef size_t _c_metadata_count
+  cdef grpc_metadata *_c_metadata
   cdef ByteBuffer _received_message
-  cdef MetadataArray _received_metadata
+  cdef bint _c_metadata_array_needs_destruction
+  cdef grpc_metadata_array _c_metadata_array
   cdef grpc_status_code _received_status_code
   cdef grpc_slice _status_details
   cdef int _received_cancelled
@@ -113,13 +105,6 @@ cdef class Operation:
   cdef object references
 
 
-cdef class Operations:
-
-  cdef grpc_op *c_ops
-  cdef size_t c_nops
-  cdef list operations
-
-
 cdef class CompressionOptions:
 
   cdef grpc_compression_options c_options
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
index 4f87261e17..26eaf50eb4 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
@@ -220,9 +220,26 @@ cdef class CallDetails:
 
 cdef class OperationTag:
 
-  def __cinit__(self, user_tag):
+  def __cinit__(self, user_tag, operations):
     self.user_tag = user_tag
     self.references = []
+    self._operations = operations
+
+  cdef void store_ops(self):
+    self.c_nops = 0 if self._operations is None else len(self._operations)
+    if 0 < self.c_nops:
+      self.c_ops = <grpc_op *>gpr_malloc(sizeof(grpc_op) * self.c_nops)
+      for index in range(self.c_nops):
+        self.c_ops[index] = (<Operation>(self._operations[index])).c_op
+
+  cdef object release_ops(self):
+    if 0 < self.c_nops:
+      for index, operation in enumerate(self._operations):
+        (<Operation>operation).c_op = self.c_ops[index]
+      gpr_free(self.c_ops)
+      return self._operations
+    else:
+      return ()
 
 
 cdef class Event:
@@ -232,7 +249,7 @@ cdef class Event:
                 CallDetails request_call_details,
                 object request_metadata,
                 bint is_new_request,
-                Operations batch_operations):
+                object batch_operations):
     self.type = type
     self.success = success
     self.tag = tag
@@ -320,7 +337,7 @@ cdef void* copy_ptr(void* ptr):
   return ptr
 
 
-cdef void destroy_ptr(grpc_exec_ctx* ctx, void* ptr):
+cdef void destroy_ptr(void* ptr):
   pass
 
 
@@ -348,7 +365,7 @@ cdef class ChannelArg:
     elif hasattr(value, '__int__'):
       # Pointer objects must override __int__() to return
       # the underlying C address (Python ints are word size).  The
-      # lifecycle of the pointer is fixed to the lifecycle of the 
+      # lifecycle of the pointer is fixed to the lifecycle of the
       # python object wrapping it.
       self.ptr_vtable.copy = &copy_ptr
       self.ptr_vtable.destroy = &destroy_ptr
@@ -390,140 +407,13 @@ cdef class ChannelArgs:
     return self.args[i]
 
 
-cdef class Metadatum:
-
-  def __cinit__(self, bytes key, bytes value):
-    self.c_metadata.key = _slice_from_bytes(key)
-    self.c_metadata.value = _slice_from_bytes(value)
-
-  cdef void _copy_metadatum(self, grpc_metadata *destination) nogil:
-    destination[0].key = _copy_slice(self.c_metadata.key)
-    destination[0].value = _copy_slice(self.c_metadata.value)
-
-  @property
-  def key(self):
-    return _slice_bytes(self.c_metadata.key)
-
-  @property
-  def value(self):
-    return _slice_bytes(self.c_metadata.value)
-
-  def __len__(self):
-    return 2
-
-  def __getitem__(self, size_t i):
-    if i == 0:
-      return self.key
-    elif i == 1:
-      return self.value
-    else:
-      raise IndexError("index must be 0 (key) or 1 (value)")
-
-  def __iter__(self):
-    return iter((self.key, self.value))
-
-  def __dealloc__(self):
-    grpc_slice_unref(self.c_metadata.key)
-    grpc_slice_unref(self.c_metadata.value)
-
-cdef class _MetadataIterator:
-
-  cdef size_t i
-  cdef size_t _length
-  cdef object _metadatum_indexable
-
-  def __cinit__(self, length, metadatum_indexable):
-    self._length = length
-    self._metadatum_indexable = metadatum_indexable
-    self.i = 0
-
-  def __iter__(self):
-    return self
-
-  def __next__(self):
-    if self.i < self._length:
-      result = self._metadatum_indexable[self.i]
-      self.i = self.i + 1
-      return result
-    else:
-      raise StopIteration()
-
-
-# TODO(https://github.com/grpc/grpc/issues/7950): Eliminate this; just use an
-# ordinary sequence of pairs of bytestrings all the way down to the
-# grpc_call_start_batch call.
-cdef class Metadata:
-  """Metadata being passed from application to core."""
-
-  def __cinit__(self, metadata_iterable):
-    metadata_sequence = tuple(metadata_iterable)
-    cdef size_t count = len(metadata_sequence)
-    with nogil:
-      grpc_init()
-      self.c_metadata = <grpc_metadata *>gpr_malloc(
-          count * sizeof(grpc_metadata))
-      self.c_count = count
-    for index, metadatum in enumerate(metadata_sequence):
-      self.c_metadata[index].key = grpc_slice_copy(
-          (<Metadatum>metadatum).c_metadata.key)
-      self.c_metadata[index].value = grpc_slice_copy(
-          (<Metadatum>metadatum).c_metadata.value)
-
-  def __dealloc__(self):
-    with nogil:
-      for index in range(self.c_count):
-        grpc_slice_unref(self.c_metadata[index].key)
-        grpc_slice_unref(self.c_metadata[index].value)
-      gpr_free(self.c_metadata)
-      grpc_shutdown()
-
-  def __len__(self):
-    return self.c_count
-
-  def __getitem__(self, size_t index):
-    if index < self.c_count:
-      key = _slice_bytes(self.c_metadata[index].key)
-      value = _slice_bytes(self.c_metadata[index].value)
-      return Metadatum(key, value)
-    else:
-      raise IndexError()
-
-  def __iter__(self):
-    return _MetadataIterator(self.c_count, self)
-
-
-cdef class MetadataArray:
-  """Metadata being passed from core to application."""
-
-  def __cinit__(self):
-    with nogil:
-      grpc_init()
-      grpc_metadata_array_init(&self.c_metadata_array)
-
-  def __dealloc__(self):
-    with nogil:
-      grpc_metadata_array_destroy(&self.c_metadata_array)
-      grpc_shutdown()
-
-  def __len__(self):
-    return self.c_metadata_array.count
-
-  def __getitem__(self, size_t i):
-    if i >= self.c_metadata_array.count:
-      raise IndexError()
-    key = _slice_bytes(self.c_metadata_array.metadata[i].key)
-    value = _slice_bytes(self.c_metadata_array.metadata[i].value)
-    return Metadatum(key=key, value=value)
-
-  def __iter__(self):
-    return _MetadataIterator(self.c_metadata_array.count, self)
-
-
 cdef class Operation:
 
   def __cinit__(self):
     grpc_init()
     self.references = []
+    self._c_metadata_needs_release = False
+    self._c_metadata_array_needs_destruction = False
     self._status_details = grpc_empty_slice()
     self.is_valid = False
 
@@ -556,13 +446,7 @@ cdef class Operation:
     if (self.c_op.type != GRPC_OP_RECV_INITIAL_METADATA and
         self.c_op.type != GRPC_OP_RECV_STATUS_ON_CLIENT):
       raise TypeError("self must be an operation receiving metadata")
-    # TODO(https://github.com/grpc/grpc/issues/7950): Drop the "all Cython
-    # objects must be legitimate for use from Python at any time" policy in
-    # place today, shift the policy toward "Operation objects are only usable
-    # while their calls are active", and move this making-a-copy-because-this-
-    # data-needs-to-live-much-longer-than-the-call-from-which-it-arose to the
-    # lowest Python layer.
-    return tuple(self._received_metadata)
+    return _metadata(&self._c_metadata_array)
 
   @property
   def received_status_code(self):
@@ -602,16 +486,21 @@ cdef class Operation:
     return False if self._received_cancelled == 0 else True
 
   def __dealloc__(self):
+    if self._c_metadata_needs_release:
+      _release_c_metadata(self._c_metadata, self._c_metadata_count)
+    if self._c_metadata_array_needs_destruction:
+      grpc_metadata_array_destroy(&self._c_metadata_array)
     grpc_slice_unref(self._status_details)
     grpc_shutdown()
 
-def operation_send_initial_metadata(Metadata metadata, int flags):
+def operation_send_initial_metadata(metadata, int flags):
   cdef Operation op = Operation()
   op.c_op.type = GRPC_OP_SEND_INITIAL_METADATA
   op.c_op.flags = flags
-  op.c_op.data.send_initial_metadata.count = metadata.c_count
-  op.c_op.data.send_initial_metadata.metadata = metadata.c_metadata
-  op.references.append(metadata)
+  _store_c_metadata(metadata, &op._c_metadata, &op._c_metadata_count)
+  op._c_metadata_needs_release = True
+  op.c_op.data.send_initial_metadata.count = op._c_metadata_count
+  op.c_op.data.send_initial_metadata.metadata = op._c_metadata
   op.is_valid = True
   return op
 
@@ -633,18 +522,19 @@ def operation_send_close_from_client(int flags):
   return op
 
 def operation_send_status_from_server(
-    Metadata metadata, grpc_status_code code, bytes details, int flags):
+    metadata, grpc_status_code code, bytes details, int flags):
   cdef Operation op = Operation()
   op.c_op.type = GRPC_OP_SEND_STATUS_FROM_SERVER
   op.c_op.flags = flags
+  _store_c_metadata(metadata, &op._c_metadata, &op._c_metadata_count)
+  op._c_metadata_needs_release = True
   op.c_op.data.send_status_from_server.trailing_metadata_count = (
-      metadata.c_count)
-  op.c_op.data.send_status_from_server.trailing_metadata = metadata.c_metadata
+      op._c_metadata_count)
+  op.c_op.data.send_status_from_server.trailing_metadata = op._c_metadata
   op.c_op.data.send_status_from_server.status = code
   grpc_slice_unref(op._status_details)
   op._status_details = _slice_from_bytes(details)
   op.c_op.data.send_status_from_server.status_details = &op._status_details
-  op.references.append(metadata)
   op.is_valid = True
   return op
 
@@ -652,9 +542,10 @@ def operation_receive_initial_metadata(int flags):
   cdef Operation op = Operation()
   op.c_op.type = GRPC_OP_RECV_INITIAL_METADATA
   op.c_op.flags = flags
-  op._received_metadata = MetadataArray()
+  grpc_metadata_array_init(&op._c_metadata_array)
   op.c_op.data.receive_initial_metadata.receive_initial_metadata = (
-      &op._received_metadata.c_metadata_array)
+      &op._c_metadata_array)
+  op._c_metadata_array_needs_destruction = True
   op.is_valid = True
   return op
 
@@ -675,9 +566,10 @@ def operation_receive_status_on_client(int flags):
   cdef Operation op = Operation()
   op.c_op.type = GRPC_OP_RECV_STATUS_ON_CLIENT
   op.c_op.flags = flags
-  op._received_metadata = MetadataArray()
+  grpc_metadata_array_init(&op._c_metadata_array)
   op.c_op.data.receive_status_on_client.trailing_metadata = (
-      &op._received_metadata.c_metadata_array)
+      &op._c_metadata_array)
+  op._c_metadata_array_needs_destruction = True
   op.c_op.data.receive_status_on_client.status = (
       &op._received_status_code)
   op.c_op.data.receive_status_on_client.status_details = (
@@ -694,59 +586,6 @@ def operation_receive_close_on_server(int flags):
   return op
 
 
-cdef class _OperationsIterator:
-
-  cdef size_t i
-  cdef Operations operations
-
-  def __cinit__(self, Operations operations not None):
-    self.i = 0
-    self.operations = operations
-
-  def __iter__(self):
-    return self
-
-  def __next__(self):
-    if self.i < len(self.operations):
-      result = self.operations[self.i]
-      self.i = self.i + 1
-      return result
-    else:
-      raise StopIteration()
-
-
-cdef class Operations:
-
-  def __cinit__(self, operations):
-    grpc_init()
-    self.operations = list(operations)  # normalize iterable
-    self.c_ops = NULL
-    self.c_nops = 0
-    for operation in self.operations:
-      if not isinstance(operation, Operation):
-        raise TypeError("expected operations to be iterable of Operation")
-    self.c_nops = len(self.operations)
-    with nogil:
-      self.c_ops = <grpc_op *>gpr_malloc(sizeof(grpc_op)*self.c_nops)
-    for i in range(self.c_nops):
-      self.c_ops[i] = (<Operation>(self.operations[i])).c_op
-
-  def __len__(self):
-    return self.c_nops
-
-  def __getitem__(self, size_t i):
-    # self.operations is never stale; it's only updated from this file
-    return self.operations[i]
-
-  def __dealloc__(self):
-    with nogil:
-      gpr_free(self.c_ops)
-    grpc_shutdown()
-
-  def __iter__(self):
-    return _OperationsIterator(self)
-
-
 cdef class CompressionOptions:
 
   def __cinit__(self):
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
index 5f3405936c..f8d7892858 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
@@ -78,23 +78,19 @@ cdef class Server:
       raise ValueError("server must be started and not shutting down")
     if server_queue not in self.registered_completion_queues:
       raise ValueError("server_queue must be a registered completion queue")
-    cdef grpc_call_error result
-    cdef OperationTag operation_tag = OperationTag(tag)
+    cdef OperationTag operation_tag = OperationTag(tag, None)
     operation_tag.operation_call = Call()
     operation_tag.request_call_details = CallDetails()
-    operation_tag.request_metadata = MetadataArray()
+    grpc_metadata_array_init(&operation_tag._c_request_metadata)
     operation_tag.references.extend([self, call_queue, server_queue])
     operation_tag.is_new_request = True
-    operation_tag.batch_operations = Operations([])
     cpython.Py_INCREF(operation_tag)
-    with nogil:
-      result = grpc_server_request_call(
-          self.c_server, &operation_tag.operation_call.c_call,
-          &operation_tag.request_call_details.c_details,
-          &operation_tag.request_metadata.c_metadata_array,
-          call_queue.c_completion_queue, server_queue.c_completion_queue,
-          <cpython.PyObject *>operation_tag)
-    return result
+    return grpc_server_request_call(
+        self.c_server, &operation_tag.operation_call.c_call,
+        &operation_tag.request_call_details.c_details,
+        &operation_tag._c_request_metadata,
+        call_queue.c_completion_queue, server_queue.c_completion_queue,
+        <cpython.PyObject *>operation_tag)
 
   def register_completion_queue(
       self, CompletionQueue queue not None):
@@ -135,7 +131,7 @@ cdef class Server:
 
   cdef _c_shutdown(self, CompletionQueue queue, tag):
     self.is_shutting_down = True
-    operation_tag = OperationTag(tag)
+    operation_tag = OperationTag(tag, None)
     operation_tag.shutting_down_server = self
     cpython.Py_INCREF(operation_tag)
     with nogil:
diff --git a/src/python/grpcio/grpc/_cython/cygrpc.pxd b/src/python/grpcio/grpc/_cython/cygrpc.pxd
index fc6cc5fb9f..6fc5638d5d 100644
--- a/src/python/grpcio/grpc/_cython/cygrpc.pxd
+++ b/src/python/grpcio/grpc/_cython/cygrpc.pxd
@@ -18,6 +18,7 @@ include "_cygrpc/call.pxd.pxi"
 include "_cygrpc/channel.pxd.pxi"
 include "_cygrpc/credentials.pxd.pxi"
 include "_cygrpc/completion_queue.pxd.pxi"
+include "_cygrpc/metadata.pxd.pxi"
 include "_cygrpc/records.pxd.pxi"
 include "_cygrpc/security.pxd.pxi"
 include "_cygrpc/server.pxd.pxi"
diff --git a/src/python/grpcio/grpc/_cython/cygrpc.pyx b/src/python/grpcio/grpc/_cython/cygrpc.pyx
index 57165d5f5a..d605229822 100644
--- a/src/python/grpcio/grpc/_cython/cygrpc.pyx
+++ b/src/python/grpcio/grpc/_cython/cygrpc.pyx
@@ -25,6 +25,7 @@ include "_cygrpc/call.pyx.pxi"
 include "_cygrpc/channel.pyx.pxi"
 include "_cygrpc/credentials.pyx.pxi"
 include "_cygrpc/completion_queue.pyx.pxi"
+include "_cygrpc/metadata.pyx.pxi"
 include "_cygrpc/records.pyx.pxi"
 include "_cygrpc/security.pyx.pxi"
 include "_cygrpc/server.pyx.pxi"
diff --git a/src/python/grpcio/grpc/_interceptor.py b/src/python/grpcio/grpc/_interceptor.py
new file mode 100644
index 0000000000..fffb269845
--- /dev/null
+++ b/src/python/grpcio/grpc/_interceptor.py
@@ -0,0 +1,318 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Implementation of gRPC Python interceptors."""
+
+import collections
+import sys
+
+import grpc
+
+
+class _ServicePipeline(object):
+
+    def __init__(self, interceptors):
+        self.interceptors = tuple(interceptors)
+
+    def _continuation(self, thunk, index):
+        return lambda context: self._intercept_at(thunk, index, context)
+
+    def _intercept_at(self, thunk, index, context):
+        if index < len(self.interceptors):
+            interceptor = self.interceptors[index]
+            thunk = self._continuation(thunk, index + 1)
+            return interceptor.intercept_service(thunk, context)
+        else:
+            return thunk(context)
+
+    def execute(self, thunk, context):
+        return self._intercept_at(thunk, 0, context)
+
+
+def service_pipeline(interceptors):
+    return _ServicePipeline(interceptors) if interceptors else None
+
+
+class _ClientCallDetails(
+        collections.namedtuple('_ClientCallDetails',
+                               ('method', 'timeout', 'metadata',
+                                'credentials')), grpc.ClientCallDetails):
+    pass
+
+
+class _LocalFailure(grpc.RpcError, grpc.Future, grpc.Call):
+
+    def __init__(self, exception, traceback):
+        super(_LocalFailure, self).__init__()
+        self._exception = exception
+        self._traceback = traceback
+
+    def initial_metadata(self):
+        return None
+
+    def trailing_metadata(self):
+        return None
+
+    def code(self):
+        return grpc.StatusCode.INTERNAL
+
+    def details(self):
+        return 'Exception raised while intercepting the RPC'
+
+    def cancel(self):
+        return False
+
+    def cancelled(self):
+        return False
+
+    def running(self):
+        return False
+
+    def done(self):
+        return True
+
+    def result(self, ignored_timeout=None):
+        raise self._exception
+
+    def exception(self, ignored_timeout=None):
+        return self._exception
+
+    def traceback(self, ignored_timeout=None):
+        return self._traceback
+
+    def add_done_callback(self, fn):
+        fn(self)
+
+    def __iter__(self):
+        return self
+
+    def next(self):
+        raise self._exception
+
+
+class _UnaryUnaryMultiCallable(grpc.UnaryUnaryMultiCallable):
+
+    def __init__(self, thunk, method, interceptor):
+        self._thunk = thunk
+        self._method = method
+        self._interceptor = interceptor
+
+    def __call__(self, request, timeout=None, metadata=None, credentials=None):
+        call_future = self.future(
+            request,
+            timeout=timeout,
+            metadata=metadata,
+            credentials=credentials)
+        return call_future.result()
+
+    def with_call(self, request, timeout=None, metadata=None, credentials=None):
+        call_future = self.future(
+            request,
+            timeout=timeout,
+            metadata=metadata,
+            credentials=credentials)
+        return call_future.result(), call_future
+
+    def future(self, request, timeout=None, metadata=None, credentials=None):
+
+        def continuation(client_call_details, request):
+            return self._thunk(client_call_details.method).future(
+                request,
+                timeout=client_call_details.timeout,
+                metadata=client_call_details.metadata,
+                credentials=client_call_details.credentials)
+
+        client_call_details = _ClientCallDetails(self._method, timeout,
+                                                 metadata, credentials)
+        try:
+            return self._interceptor.intercept_unary_unary(
+                continuation, client_call_details, request)
+        except Exception as exception:  # pylint:disable=broad-except
+            return _LocalFailure(exception, sys.exc_info()[2])
+
+
+class _UnaryStreamMultiCallable(grpc.UnaryStreamMultiCallable):
+
+    def __init__(self, thunk, method, interceptor):
+        self._thunk = thunk
+        self._method = method
+        self._interceptor = interceptor
+
+    def __call__(self, request, timeout=None, metadata=None, credentials=None):
+
+        def continuation(client_call_details, request):
+            return self._thunk(client_call_details.method)(
+                request,
+                timeout=client_call_details.timeout,
+                metadata=client_call_details.metadata,
+                credentials=client_call_details.credentials)
+
+        client_call_details = _ClientCallDetails(self._method, timeout,
+                                                 metadata, credentials)
+        try:
+            return self._interceptor.intercept_unary_stream(
+                continuation, client_call_details, request)
+        except Exception as exception:  # pylint:disable=broad-except
+            return _LocalFailure(exception, sys.exc_info()[2])
+
+
+class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
+
+    def __init__(self, thunk, method, interceptor):
+        self._thunk = thunk
+        self._method = method
+        self._interceptor = interceptor
+
+    def __call__(self,
+                 request_iterator,
+                 timeout=None,
+                 metadata=None,
+                 credentials=None):
+        call_future = self.future(
+            request_iterator,
+            timeout=timeout,
+            metadata=metadata,
+            credentials=credentials)
+        return call_future.result()
+
+    def with_call(self,
+                  request_iterator,
+                  timeout=None,
+                  metadata=None,
+                  credentials=None):
+        call_future = self.future(
+            request_iterator,
+            timeout=timeout,
+            metadata=metadata,
+            credentials=credentials)
+        return call_future.result(), call_future
+
+    def future(self,
+               request_iterator,
+               timeout=None,
+               metadata=None,
+               credentials=None):
+
+        def continuation(client_call_details, request_iterator):
+            return self._thunk(client_call_details.method).future(
+                request_iterator,
+                timeout=client_call_details.timeout,
+                metadata=client_call_details.metadata,
+                credentials=client_call_details.credentials)
+
+        client_call_details = _ClientCallDetails(self._method, timeout,
+                                                 metadata, credentials)
+
+        try:
+            return self._interceptor.intercept_stream_unary(
+                continuation, client_call_details, request_iterator)
+        except Exception as exception:  # pylint:disable=broad-except
+            return _LocalFailure(exception, sys.exc_info()[2])
+
+
+class _StreamStreamMultiCallable(grpc.StreamStreamMultiCallable):
+
+    def __init__(self, thunk, method, interceptor):
+        self._thunk = thunk
+        self._method = method
+        self._interceptor = interceptor
+
+    def __call__(self,
+                 request_iterator,
+                 timeout=None,
+                 metadata=None,
+                 credentials=None):
+
+        def continuation(client_call_details, request_iterator):
+            return self._thunk(client_call_details.method)(
+                request_iterator,
+                timeout=client_call_details.timeout,
+                metadata=client_call_details.metadata,
+                credentials=client_call_details.credentials)
+
+        client_call_details = _ClientCallDetails(self._method, timeout,
+                                                 metadata, credentials)
+
+        try:
+            return self._interceptor.intercept_stream_stream(
+                continuation, client_call_details, request_iterator)
+        except Exception as exception:  # pylint:disable=broad-except
+            return _LocalFailure(exception, sys.exc_info()[2])
+
+
+class _Channel(grpc.Channel):
+
+    def __init__(self, channel, interceptor):
+        self._channel = channel
+        self._interceptor = interceptor
+
+    def subscribe(self, *args, **kwargs):
+        self._channel.subscribe(*args, **kwargs)
+
+    def unsubscribe(self, *args, **kwargs):
+        self._channel.unsubscribe(*args, **kwargs)
+
+    def unary_unary(self,
+                    method,
+                    request_serializer=None,
+                    response_deserializer=None):
+        thunk = lambda m: self._channel.unary_unary(m, request_serializer, response_deserializer)
+        if isinstance(self._interceptor, grpc.UnaryUnaryClientInterceptor):
+            return _UnaryUnaryMultiCallable(thunk, method, self._interceptor)
+        else:
+            return thunk(method)
+
+    def unary_stream(self,
+                     method,
+                     request_serializer=None,
+                     response_deserializer=None):
+        thunk = lambda m: self._channel.unary_stream(m, request_serializer, response_deserializer)
+        if isinstance(self._interceptor, grpc.UnaryStreamClientInterceptor):
+            return _UnaryStreamMultiCallable(thunk, method, self._interceptor)
+        else:
+            return thunk(method)
+
+    def stream_unary(self,
+                     method,
+                     request_serializer=None,
+                     response_deserializer=None):
+        thunk = lambda m: self._channel.stream_unary(m, request_serializer, response_deserializer)
+        if isinstance(self._interceptor, grpc.StreamUnaryClientInterceptor):
+            return _StreamUnaryMultiCallable(thunk, method, self._interceptor)
+        else:
+            return thunk(method)
+
+    def stream_stream(self,
+                      method,
+                      request_serializer=None,
+                      response_deserializer=None):
+        thunk = lambda m: self._channel.stream_stream(m, request_serializer, response_deserializer)
+        if isinstance(self._interceptor, grpc.StreamStreamClientInterceptor):
+            return _StreamStreamMultiCallable(thunk, method, self._interceptor)
+        else:
+            return thunk(method)
+
+
+def intercept_channel(channel, *interceptors):
+    for interceptor in reversed(list(interceptors)):
+        if not isinstance(interceptor, grpc.UnaryUnaryClientInterceptor) and \
+           not isinstance(interceptor, grpc.UnaryStreamClientInterceptor) and \
+           not isinstance(interceptor, grpc.StreamUnaryClientInterceptor) and \
+           not isinstance(interceptor, grpc.StreamStreamClientInterceptor):
+            raise TypeError('interceptor must be '
+                            'grpc.UnaryUnaryClientInterceptor or '
+                            'grpc.UnaryStreamClientInterceptor or '
+                            'grpc.StreamUnaryClientInterceptor or '
+                            'grpc.StreamStreamClientInterceptor or ')
+        channel = _Channel(channel, interceptor)
+    return channel
diff --git a/src/python/grpcio/grpc/_plugin_wrapping.py b/src/python/grpcio/grpc/_plugin_wrapping.py
index cd17f4a049..f7287956dc 100644
--- a/src/python/grpcio/grpc/_plugin_wrapping.py
+++ b/src/python/grpcio/grpc/_plugin_wrapping.py
@@ -54,9 +54,7 @@ class _AuthMetadataPluginCallback(grpc.AuthMetadataPluginCallback):
                     'AuthMetadataPluginCallback raised exception "{}"!'.format(
                         self._state.exception))
         if error is None:
-            self._callback(
-                _common.to_cygrpc_metadata(metadata), cygrpc.StatusCode.ok,
-                None)
+            self._callback(metadata, cygrpc.StatusCode.ok, None)
         else:
             self._callback(None, cygrpc.StatusCode.internal,
                            _common.encode(str(error)))
diff --git a/src/python/grpcio/grpc/_server.py b/src/python/grpcio/grpc/_server.py
index 5b4812bffe..8857bd3eb5 100644
--- a/src/python/grpcio/grpc/_server.py
+++ b/src/python/grpcio/grpc/_server.py
@@ -23,6 +23,7 @@ import six
 
 import grpc
 from grpc import _common
+from grpc import _interceptor
 from grpc._cython import cygrpc
 from grpc.framework.foundation import callable_util
 
@@ -96,6 +97,7 @@ class _RPCState(object):
         self.statused = False
         self.rpc_errors = []
         self.callbacks = []
+        self.abortion = None
 
 
 def _raise_rpc_error(state):
@@ -129,19 +131,17 @@ def _abort(state, call, code, details):
         effective_details = details if state.details is None else state.details
         if state.initial_metadata_allowed:
             operations = (cygrpc.operation_send_initial_metadata(
-                _common.EMPTY_METADATA,
-                _EMPTY_FLAGS), cygrpc.operation_send_status_from_server(
-                    _common.to_cygrpc_metadata(state.trailing_metadata),
-                    effective_code, effective_details, _EMPTY_FLAGS),)
+                (), _EMPTY_FLAGS), cygrpc.operation_send_status_from_server(
+                    state.trailing_metadata, effective_code, effective_details,
+                    _EMPTY_FLAGS),)
             token = _SEND_INITIAL_METADATA_AND_SEND_STATUS_FROM_SERVER_TOKEN
         else:
             operations = (cygrpc.operation_send_status_from_server(
-                _common.to_cygrpc_metadata(state.trailing_metadata),
-                effective_code, effective_details, _EMPTY_FLAGS),)
+                state.trailing_metadata, effective_code, effective_details,
+                _EMPTY_FLAGS),)
             token = _SEND_STATUS_FROM_SERVER_TOKEN
-        call.start_server_batch(
-            cygrpc.Operations(operations),
-            _send_status_from_server(state, token))
+        call.start_server_batch(operations,
+                                _send_status_from_server(state, token))
         state.statused = True
         state.due.add(token)
 
@@ -237,7 +237,7 @@ class _Context(grpc.ServicerContext):
             self._state.disable_next_compression = True
 
     def invocation_metadata(self):
-        return _common.to_application_metadata(self._rpc_event.request_metadata)
+        return self._rpc_event.request_metadata
 
     def peer(self):
         return _common.decode(self._rpc_event.operation_call.peer())
@@ -263,11 +263,9 @@ class _Context(grpc.ServicerContext):
             else:
                 if self._state.initial_metadata_allowed:
                     operation = cygrpc.operation_send_initial_metadata(
-                        _common.to_cygrpc_metadata(initial_metadata),
-                        _EMPTY_FLAGS)
+                        initial_metadata, _EMPTY_FLAGS)
                     self._rpc_event.operation_call.start_server_batch(
-                        cygrpc.Operations((operation,)),
-                        _send_initial_metadata(self._state))
+                        (operation,), _send_initial_metadata(self._state))
                     self._state.initial_metadata_allowed = False
                     self._state.due.add(_SEND_INITIAL_METADATA_TOKEN)
                 else:
@@ -275,8 +273,14 @@ class _Context(grpc.ServicerContext):
 
     def set_trailing_metadata(self, trailing_metadata):
         with self._state.condition:
-            self._state.trailing_metadata = _common.to_cygrpc_metadata(
-                trailing_metadata)
+            self._state.trailing_metadata = trailing_metadata
+
+    def abort(self, code, details):
+        with self._state.condition:
+            self._state.code = code
+            self._state.details = _common.encode(details)
+            self._state.abortion = Exception()
+            raise self._state.abortion
 
     def set_code(self, code):
         with self._state.condition:
@@ -301,8 +305,7 @@ class _RequestIterator(object):
             raise StopIteration()
         else:
             self._call.start_server_batch(
-                cygrpc.Operations(
-                    (cygrpc.operation_receive_message(_EMPTY_FLAGS),)),
+                (cygrpc.operation_receive_message(_EMPTY_FLAGS),),
                 _receive_message(self._state, self._call,
                                  self._request_deserializer))
             self._state.due.add(_RECEIVE_MESSAGE_TOKEN)
@@ -345,8 +348,7 @@ def _unary_request(rpc_event, state, request_deserializer):
                 return None
             else:
                 rpc_event.operation_call.start_server_batch(
-                    cygrpc.Operations(
-                        (cygrpc.operation_receive_message(_EMPTY_FLAGS),)),
+                    (cygrpc.operation_receive_message(_EMPTY_FLAGS),),
                     _receive_message(state, rpc_event.operation_call,
                                      request_deserializer))
                 state.due.add(_RECEIVE_MESSAGE_TOKEN)
@@ -376,7 +378,10 @@ def _call_behavior(rpc_event, state, behavior, argument, request_deserializer):
         return behavior(argument, context), True
     except Exception as exception:  # pylint: disable=broad-except
         with state.condition:
-            if exception not in state.rpc_errors:
+            if exception is state.abortion:
+                _abort(state, rpc_event.operation_call,
+                       cygrpc.StatusCode.unknown, b'RPC Aborted')
+            elif exception not in state.rpc_errors:
                 details = 'Exception calling application: {}'.format(exception)
                 logging.exception(details)
                 _abort(state, rpc_event.operation_call,
@@ -391,7 +396,10 @@ def _take_response_from_response_iterator(rpc_event, state, response_iterator):
         return None, True
     except Exception as exception:  # pylint: disable=broad-except
         with state.condition:
-            if exception not in state.rpc_errors:
+            if exception is state.abortion:
+                _abort(state, rpc_event.operation_call,
+                       cygrpc.StatusCode.unknown, b'RPC Aborted')
+            elif exception not in state.rpc_errors:
                 details = 'Exception iterating responses: {}'.format(exception)
                 logging.exception(details)
                 _abort(state, rpc_event.operation_call,
@@ -417,9 +425,8 @@ def _send_response(rpc_event, state, serialized_response):
         else:
             if state.initial_metadata_allowed:
                 operations = (cygrpc.operation_send_initial_metadata(
-                    _common.EMPTY_METADATA, _EMPTY_FLAGS),
-                              cygrpc.operation_send_message(serialized_response,
-                                                            _EMPTY_FLAGS),)
+                    (), _EMPTY_FLAGS), cygrpc.operation_send_message(
+                        serialized_response, _EMPTY_FLAGS),)
                 state.initial_metadata_allowed = False
                 token = _SEND_INITIAL_METADATA_AND_SEND_MESSAGE_TOKEN
             else:
@@ -427,7 +434,7 @@ def _send_response(rpc_event, state, serialized_response):
                                                             _EMPTY_FLAGS),)
                 token = _SEND_MESSAGE_TOKEN
             rpc_event.operation_call.start_server_batch(
-                cygrpc.Operations(operations), _send_message(state, token))
+                operations, _send_message(state, token))
             state.due.add(token)
             while True:
                 state.condition.wait()
@@ -438,24 +445,21 @@ def _send_response(rpc_event, state, serialized_response):
 def _status(rpc_event, state, serialized_response):
     with state.condition:
         if state.client is not _CANCELLED:
-            trailing_metadata = _common.to_cygrpc_metadata(
-                state.trailing_metadata)
             code = _completion_code(state)
             details = _details(state)
             operations = [
                 cygrpc.operation_send_status_from_server(
-                    trailing_metadata, code, details, _EMPTY_FLAGS),
+                    state.trailing_metadata, code, details, _EMPTY_FLAGS),
             ]
             if state.initial_metadata_allowed:
                 operations.append(
-                    cygrpc.operation_send_initial_metadata(
-                        _common.EMPTY_METADATA, _EMPTY_FLAGS))
+                    cygrpc.operation_send_initial_metadata((), _EMPTY_FLAGS))
             if serialized_response is not None:
                 operations.append(
                     cygrpc.operation_send_message(serialized_response,
                                                   _EMPTY_FLAGS))
             rpc_event.operation_call.start_server_batch(
-                cygrpc.Operations(operations),
+                operations,
                 _send_status_from_server(state, _SEND_STATUS_FROM_SERVER_TOKEN))
             state.statused = True
             state.due.add(_SEND_STATUS_FROM_SERVER_TOKEN)
@@ -538,24 +542,31 @@ def _handle_stream_stream(rpc_event, state, method_handler, thread_pool):
         method_handler.request_deserializer, method_handler.response_serializer)
 
 
-def _find_method_handler(rpc_event, generic_handlers):
-    for generic_handler in generic_handlers:
-        method_handler = generic_handler.service(
-            _HandlerCallDetails(
-                _common.decode(rpc_event.request_call_details.method),
-                rpc_event.request_metadata))
-        if method_handler is not None:
-            return method_handler
-    else:
+def _find_method_handler(rpc_event, generic_handlers, interceptor_pipeline):
+
+    def query_handlers(handler_call_details):
+        for generic_handler in generic_handlers:
+            method_handler = generic_handler.service(handler_call_details)
+            if method_handler is not None:
+                return method_handler
         return None
 
+    handler_call_details = _HandlerCallDetails(
+        _common.decode(rpc_event.request_call_details.method),
+        rpc_event.request_metadata)
+
+    if interceptor_pipeline is not None:
+        return interceptor_pipeline.execute(query_handlers,
+                                            handler_call_details)
+    else:
+        return query_handlers(handler_call_details)
+
 
 def _reject_rpc(rpc_event, status, details):
-    operations = (cygrpc.operation_send_initial_metadata(_common.EMPTY_METADATA,
-                                                         _EMPTY_FLAGS),
+    operations = (cygrpc.operation_send_initial_metadata((), _EMPTY_FLAGS),
                   cygrpc.operation_receive_close_on_server(_EMPTY_FLAGS),
-                  cygrpc.operation_send_status_from_server(
-                      _common.EMPTY_METADATA, status, details, _EMPTY_FLAGS),)
+                  cygrpc.operation_send_status_from_server((), status, details,
+                                                           _EMPTY_FLAGS),)
     rpc_state = _RPCState()
     rpc_event.operation_call.start_server_batch(
         operations, lambda ignored_event: (rpc_state, (),))
@@ -566,8 +577,7 @@ def _handle_with_method_handler(rpc_event, method_handler, thread_pool):
     state = _RPCState()
     with state.condition:
         rpc_event.operation_call.start_server_batch(
-            cygrpc.Operations(
-                (cygrpc.operation_receive_close_on_server(_EMPTY_FLAGS),)),
+            (cygrpc.operation_receive_close_on_server(_EMPTY_FLAGS),),
             _receive_close_on_server(state))
         state.due.add(_RECEIVE_CLOSE_ON_SERVER_TOKEN)
         if method_handler.request_streaming:
@@ -586,13 +596,14 @@ def _handle_with_method_handler(rpc_event, method_handler, thread_pool):
                                                   method_handler, thread_pool)
 
 
-def _handle_call(rpc_event, generic_handlers, thread_pool,
+def _handle_call(rpc_event, generic_handlers, interceptor_pipeline, thread_pool,
                  concurrency_exceeded):
     if not rpc_event.success:
         return None, None
     if rpc_event.request_call_details.method is not None:
         try:
-            method_handler = _find_method_handler(rpc_event, generic_handlers)
+            method_handler = _find_method_handler(rpc_event, generic_handlers,
+                                                  interceptor_pipeline)
         except Exception as exception:  # pylint: disable=broad-except
             details = 'Exception servicing handler: {}'.format(exception)
             logging.exception(details)
@@ -620,12 +631,14 @@ class _ServerStage(enum.Enum):
 
 class _ServerState(object):
 
-    def __init__(self, completion_queue, server, generic_handlers, thread_pool,
-                 maximum_concurrent_rpcs):
+    # pylint: disable=too-many-arguments
+    def __init__(self, completion_queue, server, generic_handlers,
+                 interceptor_pipeline, thread_pool, maximum_concurrent_rpcs):
         self.lock = threading.Lock()
         self.completion_queue = completion_queue
         self.server = server
         self.generic_handlers = list(generic_handlers)
+        self.interceptor_pipeline = interceptor_pipeline
         self.thread_pool = thread_pool
         self.stage = _ServerStage.STOPPED
         self.shutdown_events = None
@@ -690,8 +703,8 @@ def _serve(state):
                     state.maximum_concurrent_rpcs is not None and
                     state.active_rpc_count >= state.maximum_concurrent_rpcs)
                 rpc_state, rpc_future = _handle_call(
-                    event, state.generic_handlers, state.thread_pool,
-                    concurrency_exceeded)
+                    event, state.generic_handlers, state.interceptor_pipeline,
+                    state.thread_pool, concurrency_exceeded)
                 if rpc_state is not None:
                     state.rpc_states.add(rpc_state)
                 if rpc_future is not None:
@@ -779,12 +792,14 @@ def _start(state):
 
 class Server(grpc.Server):
 
-    def __init__(self, thread_pool, generic_handlers, options,
+    # pylint: disable=too-many-arguments
+    def __init__(self, thread_pool, generic_handlers, interceptors, options,
                  maximum_concurrent_rpcs):
         completion_queue = cygrpc.CompletionQueue()
         server = cygrpc.Server(_common.channel_args(options))
         server.register_completion_queue(completion_queue)
         self._state = _ServerState(completion_queue, server, generic_handlers,
+                                   _interceptor.service_pipeline(interceptors),
                                    thread_pool, maximum_concurrent_rpcs)
 
     def add_generic_rpc_handlers(self, generic_rpc_handlers):
diff --git a/src/python/grpcio/grpc/beta/_client_adaptations.py b/src/python/grpcio/grpc/beta/_client_adaptations.py
index 73ce22fa98..dcaa0eeaa2 100644
--- a/src/python/grpcio/grpc/beta/_client_adaptations.py
+++ b/src/python/grpcio/grpc/beta/_client_adaptations.py
@@ -15,6 +15,7 @@
 
 import grpc
 from grpc import _common
+from grpc.beta import _metadata
 from grpc.beta import interfaces
 from grpc.framework.common import cardinality
 from grpc.framework.foundation import future
@@ -157,10 +158,10 @@ class _Rendezvous(future.Future, face.Call):
         return _InvocationProtocolContext()
 
     def initial_metadata(self):
-        return self._call.initial_metadata()
+        return _metadata.beta(self._call.initial_metadata())
 
     def terminal_metadata(self):
-        return self._call.terminal_metadata()
+        return _metadata.beta(self._call.terminal_metadata())
 
     def code(self):
         return self._call.code()
@@ -182,14 +183,14 @@ def _blocking_unary_unary(channel, group, method, timeout, with_call,
             response, call = multi_callable.with_call(
                 request,
                 timeout=timeout,
-                metadata=effective_metadata,
+                metadata=_metadata.unbeta(effective_metadata),
                 credentials=_credentials(protocol_options))
             return response, _Rendezvous(None, None, call)
         else:
             return multi_callable(
                 request,
                 timeout=timeout,
-                metadata=effective_metadata,
+                metadata=_metadata.unbeta(effective_metadata),
                 credentials=_credentials(protocol_options))
     except grpc.RpcError as rpc_error_call:
         raise _abortion_error(rpc_error_call)
@@ -206,7 +207,7 @@ def _future_unary_unary(channel, group, method, timeout, protocol_options,
     response_future = multi_callable.future(
         request,
         timeout=timeout,
-        metadata=effective_metadata,
+        metadata=_metadata.unbeta(effective_metadata),
         credentials=_credentials(protocol_options))
     return _Rendezvous(response_future, None, response_future)
 
@@ -222,7 +223,7 @@ def _unary_stream(channel, group, method, timeout, protocol_options, metadata,
     response_iterator = multi_callable(
         request,
         timeout=timeout,
-        metadata=effective_metadata,
+        metadata=_metadata.unbeta(effective_metadata),
         credentials=_credentials(protocol_options))
     return _Rendezvous(None, response_iterator, response_iterator)
 
@@ -241,14 +242,14 @@ def _blocking_stream_unary(channel, group, method, timeout, with_call,
             response, call = multi_callable.with_call(
                 request_iterator,
                 timeout=timeout,
-                metadata=effective_metadata,
+                metadata=_metadata.unbeta(effective_metadata),
                 credentials=_credentials(protocol_options))
             return response, _Rendezvous(None, None, call)
         else:
             return multi_callable(
                 request_iterator,
                 timeout=timeout,
-                metadata=effective_metadata,
+                metadata=_metadata.unbeta(effective_metadata),
                 credentials=_credentials(protocol_options))
     except grpc.RpcError as rpc_error_call:
         raise _abortion_error(rpc_error_call)
@@ -265,7 +266,7 @@ def _future_stream_unary(channel, group, method, timeout, protocol_options,
     response_future = multi_callable.future(
         request_iterator,
         timeout=timeout,
-        metadata=effective_metadata,
+        metadata=_metadata.unbeta(effective_metadata),
         credentials=_credentials(protocol_options))
     return _Rendezvous(response_future, None, response_future)
 
@@ -281,7 +282,7 @@ def _stream_stream(channel, group, method, timeout, protocol_options, metadata,
     response_iterator = multi_callable(
         request_iterator,
         timeout=timeout,
-        metadata=effective_metadata,
+        metadata=_metadata.unbeta(effective_metadata),
         credentials=_credentials(protocol_options))
     return _Rendezvous(None, response_iterator, response_iterator)
 
diff --git a/src/python/grpcio/grpc/beta/_metadata.py b/src/python/grpcio/grpc/beta/_metadata.py
new file mode 100644
index 0000000000..e135f4dff4
--- /dev/null
+++ b/src/python/grpcio/grpc/beta/_metadata.py
@@ -0,0 +1,49 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""API metadata conversion utilities."""
+
+import collections
+
+_Metadatum = collections.namedtuple('_Metadatum', ('key', 'value',))
+
+
+def _beta_metadatum(key, value):
+    beta_key = key if isinstance(key, (bytes,)) else key.encode('ascii')
+    beta_value = value if isinstance(value, (bytes,)) else value.encode('ascii')
+    return _Metadatum(beta_key, beta_value)
+
+
+def _metadatum(beta_key, beta_value):
+    key = beta_key if isinstance(beta_key, (str,)) else beta_key.decode('utf8')
+    if isinstance(beta_value, (str,)) or key[-4:] == '-bin':
+        value = beta_value
+    else:
+        value = beta_value.decode('utf8')
+    return _Metadatum(key, value)
+
+
+def beta(metadata):
+    if metadata is None:
+        return ()
+    else:
+        return tuple(_beta_metadatum(key, value) for key, value in metadata)
+
+
+def unbeta(beta_metadata):
+    if beta_metadata is None:
+        return ()
+    else:
+        return tuple(
+            _metadatum(beta_key, beta_value)
+            for beta_key, beta_value in beta_metadata)
diff --git a/src/python/grpcio/grpc/beta/_server_adaptations.py b/src/python/grpcio/grpc/beta/_server_adaptations.py
index ec363e9bc9..1c22dbe3bb 100644
--- a/src/python/grpcio/grpc/beta/_server_adaptations.py
+++ b/src/python/grpcio/grpc/beta/_server_adaptations.py
@@ -18,6 +18,7 @@ import threading
 
 import grpc
 from grpc import _common
+from grpc.beta import _metadata
 from grpc.beta import interfaces
 from grpc.framework.common import cardinality
 from grpc.framework.common import style
@@ -65,14 +66,15 @@ class _FaceServicerContext(face.ServicerContext):
         return _ServerProtocolContext(self._servicer_context)
 
     def invocation_metadata(self):
-        return _common.to_cygrpc_metadata(
-            self._servicer_context.invocation_metadata())
+        return _metadata.beta(self._servicer_context.invocation_metadata())
 
     def initial_metadata(self, initial_metadata):
-        self._servicer_context.send_initial_metadata(initial_metadata)
+        self._servicer_context.send_initial_metadata(
+            _metadata.unbeta(initial_metadata))
 
     def terminal_metadata(self, terminal_metadata):
-        self._servicer_context.set_terminal_metadata(terminal_metadata)
+        self._servicer_context.set_terminal_metadata(
+            _metadata.unbeta(terminal_metadata))
 
     def code(self, code):
         self._servicer_context.set_code(code)
diff --git a/src/python/grpcio/grpc/beta/implementations.py b/src/python/grpcio/grpc/beta/implementations.py
index e52ce764b5..312daf033e 100644
--- a/src/python/grpcio/grpc/beta/implementations.py
+++ b/src/python/grpcio/grpc/beta/implementations.py
@@ -21,6 +21,7 @@ import threading  # pylint: disable=unused-import
 import grpc
 from grpc import _auth
 from grpc.beta import _client_adaptations
+from grpc.beta import _metadata
 from grpc.beta import _server_adaptations
 from grpc.beta import interfaces  # pylint: disable=unused-import
 from grpc.framework.common import cardinality  # pylint: disable=unused-import
@@ -31,7 +32,18 @@ from grpc.framework.interfaces.face import face  # pylint: disable=unused-import
 ChannelCredentials = grpc.ChannelCredentials
 ssl_channel_credentials = grpc.ssl_channel_credentials
 CallCredentials = grpc.CallCredentials
-metadata_call_credentials = grpc.metadata_call_credentials
+
+
+def metadata_call_credentials(metadata_plugin, name=None):
+
+    def plugin(context, callback):
+
+        def wrapped_callback(beta_metadata, error):
+            callback(_metadata.unbeta(beta_metadata), error)
+
+        metadata_plugin(context, wrapped_callback)
+
+    return grpc.metadata_call_credentials(plugin, name=name)
 
 
 def google_call_credentials(credentials):
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index d2a68f0902..aea0786890 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -15,667 +15,667 @@
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio/grpc_core_dependencies.py.template`!!!
 
 CORE_SOURCE_FILES = [
-  'src/core/lib/profiling/basic_timers.cc',
-  'src/core/lib/profiling/stap_timers.cc',
-  'src/core/lib/support/alloc.cc',
-  'src/core/lib/support/arena.cc',
-  'src/core/lib/support/atm.cc',
-  'src/core/lib/support/avl.cc',
-  'src/core/lib/support/cmdline.cc',
-  'src/core/lib/support/cpu_iphone.cc',
-  'src/core/lib/support/cpu_linux.cc',
-  'src/core/lib/support/cpu_posix.cc',
-  'src/core/lib/support/cpu_windows.cc',
-  'src/core/lib/support/env_linux.cc',
-  'src/core/lib/support/env_posix.cc',
-  'src/core/lib/support/env_windows.cc',
-  'src/core/lib/support/fork.cc',
-  'src/core/lib/support/host_port.cc',
-  'src/core/lib/support/log.cc',
-  'src/core/lib/support/log_android.cc',
-  'src/core/lib/support/log_linux.cc',
-  'src/core/lib/support/log_posix.cc',
-  'src/core/lib/support/log_windows.cc',
-  'src/core/lib/support/mpscq.cc',
-  'src/core/lib/support/murmur_hash.cc',
-  'src/core/lib/support/string.cc',
-  'src/core/lib/support/string_posix.cc',
-  'src/core/lib/support/string_util_windows.cc',
-  'src/core/lib/support/string_windows.cc',
-  'src/core/lib/support/subprocess_posix.cc',
-  'src/core/lib/support/subprocess_windows.cc',
-  'src/core/lib/support/sync.cc',
-  'src/core/lib/support/sync_posix.cc',
-  'src/core/lib/support/sync_windows.cc',
-  'src/core/lib/support/thd.cc',
-  'src/core/lib/support/thd_posix.cc',
-  'src/core/lib/support/thd_windows.cc',
-  'src/core/lib/support/time.cc',
-  'src/core/lib/support/time_posix.cc',
-  'src/core/lib/support/time_precise.cc',
-  'src/core/lib/support/time_windows.cc',
-  'src/core/lib/support/tls_pthread.cc',
-  'src/core/lib/support/tmpfile_msys.cc',
-  'src/core/lib/support/tmpfile_posix.cc',
-  'src/core/lib/support/tmpfile_windows.cc',
-  'src/core/lib/support/wrap_memcpy.cc',
-  'src/core/lib/surface/init.cc',
-  'src/core/lib/backoff/backoff.cc',
-  'src/core/lib/channel/channel_args.cc',
-  'src/core/lib/channel/channel_stack.cc',
-  'src/core/lib/channel/channel_stack_builder.cc',
-  'src/core/lib/channel/connected_channel.cc',
-  'src/core/lib/channel/handshaker.cc',
-  'src/core/lib/channel/handshaker_factory.cc',
-  'src/core/lib/channel/handshaker_registry.cc',
-  'src/core/lib/compression/compression.cc',
-  'src/core/lib/compression/message_compress.cc',
-  'src/core/lib/compression/stream_compression.cc',
-  'src/core/lib/compression/stream_compression_gzip.cc',
-  'src/core/lib/compression/stream_compression_identity.cc',
-  'src/core/lib/debug/stats.cc',
-  'src/core/lib/debug/stats_data.cc',
-  'src/core/lib/http/format_request.cc',
-  'src/core/lib/http/httpcli.cc',
-  'src/core/lib/http/parser.cc',
-  'src/core/lib/iomgr/call_combiner.cc',
-  'src/core/lib/iomgr/combiner.cc',
-  'src/core/lib/iomgr/endpoint.cc',
-  'src/core/lib/iomgr/endpoint_pair_posix.cc',
-  'src/core/lib/iomgr/endpoint_pair_uv.cc',
-  'src/core/lib/iomgr/endpoint_pair_windows.cc',
-  'src/core/lib/iomgr/error.cc',
-  'src/core/lib/iomgr/ev_epoll1_linux.cc',
-  'src/core/lib/iomgr/ev_epollex_linux.cc',
-  'src/core/lib/iomgr/ev_epollsig_linux.cc',
-  'src/core/lib/iomgr/ev_poll_posix.cc',
-  'src/core/lib/iomgr/ev_posix.cc',
-  'src/core/lib/iomgr/ev_windows.cc',
-  'src/core/lib/iomgr/exec_ctx.cc',
-  'src/core/lib/iomgr/executor.cc',
-  'src/core/lib/iomgr/fork_posix.cc',
-  'src/core/lib/iomgr/fork_windows.cc',
-  'src/core/lib/iomgr/gethostname_fallback.cc',
-  'src/core/lib/iomgr/gethostname_host_name_max.cc',
-  'src/core/lib/iomgr/gethostname_sysconf.cc',
-  'src/core/lib/iomgr/iocp_windows.cc',
-  'src/core/lib/iomgr/iomgr.cc',
-  'src/core/lib/iomgr/iomgr_posix.cc',
-  'src/core/lib/iomgr/iomgr_uv.cc',
-  'src/core/lib/iomgr/iomgr_windows.cc',
-  'src/core/lib/iomgr/is_epollexclusive_available.cc',
-  'src/core/lib/iomgr/load_file.cc',
-  'src/core/lib/iomgr/lockfree_event.cc',
-  'src/core/lib/iomgr/network_status_tracker.cc',
-  'src/core/lib/iomgr/polling_entity.cc',
-  'src/core/lib/iomgr/pollset_set_uv.cc',
-  'src/core/lib/iomgr/pollset_set_windows.cc',
-  'src/core/lib/iomgr/pollset_uv.cc',
-  'src/core/lib/iomgr/pollset_windows.cc',
-  'src/core/lib/iomgr/resolve_address_posix.cc',
-  'src/core/lib/iomgr/resolve_address_uv.cc',
-  'src/core/lib/iomgr/resolve_address_windows.cc',
-  'src/core/lib/iomgr/resource_quota.cc',
-  'src/core/lib/iomgr/sockaddr_utils.cc',
-  'src/core/lib/iomgr/socket_factory_posix.cc',
-  'src/core/lib/iomgr/socket_mutator.cc',
-  'src/core/lib/iomgr/socket_utils_common_posix.cc',
-  'src/core/lib/iomgr/socket_utils_linux.cc',
-  'src/core/lib/iomgr/socket_utils_posix.cc',
-  'src/core/lib/iomgr/socket_utils_uv.cc',
-  'src/core/lib/iomgr/socket_utils_windows.cc',
-  'src/core/lib/iomgr/socket_windows.cc',
-  'src/core/lib/iomgr/tcp_client_posix.cc',
-  'src/core/lib/iomgr/tcp_client_uv.cc',
-  'src/core/lib/iomgr/tcp_client_windows.cc',
-  'src/core/lib/iomgr/tcp_posix.cc',
-  'src/core/lib/iomgr/tcp_server_posix.cc',
-  'src/core/lib/iomgr/tcp_server_utils_posix_common.cc',
-  'src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.cc',
-  'src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.cc',
-  'src/core/lib/iomgr/tcp_server_uv.cc',
-  'src/core/lib/iomgr/tcp_server_windows.cc',
-  'src/core/lib/iomgr/tcp_uv.cc',
-  'src/core/lib/iomgr/tcp_windows.cc',
-  'src/core/lib/iomgr/time_averaged_stats.cc',
-  'src/core/lib/iomgr/timer_generic.cc',
-  'src/core/lib/iomgr/timer_heap.cc',
-  'src/core/lib/iomgr/timer_manager.cc',
-  'src/core/lib/iomgr/timer_uv.cc',
-  'src/core/lib/iomgr/udp_server.cc',
-  'src/core/lib/iomgr/unix_sockets_posix.cc',
-  'src/core/lib/iomgr/unix_sockets_posix_noop.cc',
-  'src/core/lib/iomgr/wakeup_fd_cv.cc',
-  'src/core/lib/iomgr/wakeup_fd_eventfd.cc',
-  'src/core/lib/iomgr/wakeup_fd_nospecial.cc',
-  'src/core/lib/iomgr/wakeup_fd_pipe.cc',
-  'src/core/lib/iomgr/wakeup_fd_posix.cc',
-  'src/core/lib/json/json.cc',
-  'src/core/lib/json/json_reader.cc',
-  'src/core/lib/json/json_string.cc',
-  'src/core/lib/json/json_writer.cc',
-  'src/core/lib/slice/b64.cc',
-  'src/core/lib/slice/percent_encoding.cc',
-  'src/core/lib/slice/slice.cc',
-  'src/core/lib/slice/slice_buffer.cc',
-  'src/core/lib/slice/slice_hash_table.cc',
-  'src/core/lib/slice/slice_intern.cc',
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-  'src/core/lib/security/credentials/plugin/plugin_credentials.cc',
-  'src/core/lib/security/credentials/ssl/ssl_credentials.cc',
-  'src/core/lib/security/transport/client_auth_filter.cc',
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-  'src/core/tsi/transport_security_adapter.cc',
-  'src/core/ext/transport/chttp2/server/chttp2_server.cc',
-  'src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc',
-  'src/core/ext/filters/client_channel/backup_poller.cc',
-  'src/core/ext/filters/client_channel/channel_connectivity.cc',
-  'src/core/ext/filters/client_channel/client_channel.cc',
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-  'src/core/ext/filters/client_channel/client_channel_plugin.cc',
-  'src/core/ext/filters/client_channel/connector.cc',
-  'src/core/ext/filters/client_channel/http_connect_handshaker.cc',
-  'src/core/ext/filters/client_channel/http_proxy.cc',
-  'src/core/ext/filters/client_channel/lb_policy.cc',
-  'src/core/ext/filters/client_channel/lb_policy_factory.cc',
-  'src/core/ext/filters/client_channel/lb_policy_registry.cc',
-  'src/core/ext/filters/client_channel/parse_address.cc',
-  'src/core/ext/filters/client_channel/proxy_mapper.cc',
-  'src/core/ext/filters/client_channel/proxy_mapper_registry.cc',
-  'src/core/ext/filters/client_channel/resolver.cc',
-  'src/core/ext/filters/client_channel/resolver_factory.cc',
-  'src/core/ext/filters/client_channel/resolver_registry.cc',
-  'src/core/ext/filters/client_channel/retry_throttle.cc',
-  'src/core/ext/filters/client_channel/subchannel.cc',
-  'src/core/ext/filters/client_channel/subchannel_index.cc',
-  'src/core/ext/filters/client_channel/uri_parser.cc',
-  'src/core/ext/filters/deadline/deadline_filter.cc',
-  'src/core/ext/transport/chttp2/client/chttp2_connector.cc',
-  'src/core/ext/transport/chttp2/server/insecure/server_chttp2.cc',
-  'src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.cc',
-  'src/core/ext/transport/chttp2/client/insecure/channel_create.cc',
-  'src/core/ext/transport/chttp2/client/insecure/channel_create_posix.cc',
-  'src/core/ext/transport/inproc/inproc_plugin.cc',
-  'src/core/ext/transport/inproc/inproc_transport.cc',
-  'src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc',
-  'src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc',
-  'src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel_secure.cc',
-  'src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_client_stats.cc',
-  'src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc',
-  'src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c',
-  'third_party/nanopb/pb_common.c',
-  'third_party/nanopb/pb_decode.c',
-  'third_party/nanopb/pb_encode.c',
-  'src/core/ext/filters/client_channel/resolver/fake/fake_resolver.cc',
-  'src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc',
-  'src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc',
-  'src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc',
-  'src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc',
-  'src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc',
-  'src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc',
-  'src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper_fallback.cc',
-  'src/core/ext/filters/client_channel/resolver/dns/native/dns_resolver.cc',
-  'src/core/ext/filters/client_channel/resolver/sockaddr/sockaddr_resolver.cc',
-  'src/core/ext/filters/load_reporting/server_load_reporting_filter.cc',
-  'src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc',
-  'src/core/ext/census/grpc_context.cc',
-  'src/core/ext/filters/max_age/max_age_filter.cc',
-  'src/core/ext/filters/message_size/message_size_filter.cc',
-  'src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc',
-  'src/core/ext/filters/workarounds/workaround_utils.cc',
-  'src/core/plugin_registry/grpc_plugin_registry.cc',
-  'src/boringssl/err_data.c',
-  'third_party/boringssl/crypto/aes/aes.c',
-  'third_party/boringssl/crypto/aes/key_wrap.c',
-  'third_party/boringssl/crypto/aes/mode_wrappers.c',
-  'third_party/boringssl/crypto/asn1/a_bitstr.c',
-  'third_party/boringssl/crypto/asn1/a_bool.c',
-  'third_party/boringssl/crypto/asn1/a_d2i_fp.c',
-  'third_party/boringssl/crypto/asn1/a_dup.c',
-  'third_party/boringssl/crypto/asn1/a_enum.c',
-  'third_party/boringssl/crypto/asn1/a_gentm.c',
-  'third_party/boringssl/crypto/asn1/a_i2d_fp.c',
-  'third_party/boringssl/crypto/asn1/a_int.c',
-  'third_party/boringssl/crypto/asn1/a_mbstr.c',
-  'third_party/boringssl/crypto/asn1/a_object.c',
-  'third_party/boringssl/crypto/asn1/a_octet.c',
-  'third_party/boringssl/crypto/asn1/a_print.c',
-  'third_party/boringssl/crypto/asn1/a_strnid.c',
-  'third_party/boringssl/crypto/asn1/a_time.c',
-  'third_party/boringssl/crypto/asn1/a_type.c',
-  'third_party/boringssl/crypto/asn1/a_utctm.c',
-  'third_party/boringssl/crypto/asn1/a_utf8.c',
-  'third_party/boringssl/crypto/asn1/asn1_lib.c',
-  'third_party/boringssl/crypto/asn1/asn1_par.c',
-  'third_party/boringssl/crypto/asn1/asn_pack.c',
-  'third_party/boringssl/crypto/asn1/f_enum.c',
-  'third_party/boringssl/crypto/asn1/f_int.c',
-  'third_party/boringssl/crypto/asn1/f_string.c',
-  'third_party/boringssl/crypto/asn1/t_bitst.c',
-  'third_party/boringssl/crypto/asn1/tasn_dec.c',
-  'third_party/boringssl/crypto/asn1/tasn_enc.c',
-  'third_party/boringssl/crypto/asn1/tasn_fre.c',
-  'third_party/boringssl/crypto/asn1/tasn_new.c',
-  'third_party/boringssl/crypto/asn1/tasn_typ.c',
-  'third_party/boringssl/crypto/asn1/tasn_utl.c',
-  'third_party/boringssl/crypto/asn1/time_support.c',
-  'third_party/boringssl/crypto/asn1/x_bignum.c',
-  'third_party/boringssl/crypto/asn1/x_long.c',
-  'third_party/boringssl/crypto/base64/base64.c',
-  'third_party/boringssl/crypto/bio/bio.c',
-  'third_party/boringssl/crypto/bio/bio_mem.c',
-  'third_party/boringssl/crypto/bio/connect.c',
-  'third_party/boringssl/crypto/bio/fd.c',
-  'third_party/boringssl/crypto/bio/file.c',
-  'third_party/boringssl/crypto/bio/hexdump.c',
-  'third_party/boringssl/crypto/bio/pair.c',
-  'third_party/boringssl/crypto/bio/printf.c',
-  'third_party/boringssl/crypto/bio/socket.c',
-  'third_party/boringssl/crypto/bio/socket_helper.c',
-  'third_party/boringssl/crypto/bn/add.c',
-  'third_party/boringssl/crypto/bn/asm/x86_64-gcc.c',
-  'third_party/boringssl/crypto/bn/bn.c',
-  'third_party/boringssl/crypto/bn/bn_asn1.c',
-  'third_party/boringssl/crypto/bn/cmp.c',
-  'third_party/boringssl/crypto/bn/convert.c',
-  'third_party/boringssl/crypto/bn/ctx.c',
-  'third_party/boringssl/crypto/bn/div.c',
-  'third_party/boringssl/crypto/bn/exponentiation.c',
-  'third_party/boringssl/crypto/bn/gcd.c',
-  'third_party/boringssl/crypto/bn/generic.c',
-  'third_party/boringssl/crypto/bn/kronecker.c',
-  'third_party/boringssl/crypto/bn/montgomery.c',
-  'third_party/boringssl/crypto/bn/montgomery_inv.c',
-  'third_party/boringssl/crypto/bn/mul.c',
-  'third_party/boringssl/crypto/bn/prime.c',
-  'third_party/boringssl/crypto/bn/random.c',
-  'third_party/boringssl/crypto/bn/rsaz_exp.c',
-  'third_party/boringssl/crypto/bn/shift.c',
-  'third_party/boringssl/crypto/bn/sqrt.c',
-  'third_party/boringssl/crypto/buf/buf.c',
-  'third_party/boringssl/crypto/bytestring/asn1_compat.c',
-  'third_party/boringssl/crypto/bytestring/ber.c',
-  'third_party/boringssl/crypto/bytestring/cbb.c',
-  'third_party/boringssl/crypto/bytestring/cbs.c',
-  'third_party/boringssl/crypto/chacha/chacha.c',
-  'third_party/boringssl/crypto/cipher/aead.c',
-  'third_party/boringssl/crypto/cipher/cipher.c',
-  'third_party/boringssl/crypto/cipher/derive_key.c',
-  'third_party/boringssl/crypto/cipher/e_aes.c',
-  'third_party/boringssl/crypto/cipher/e_chacha20poly1305.c',
-  'third_party/boringssl/crypto/cipher/e_des.c',
-  'third_party/boringssl/crypto/cipher/e_null.c',
-  'third_party/boringssl/crypto/cipher/e_rc2.c',
-  'third_party/boringssl/crypto/cipher/e_rc4.c',
-  'third_party/boringssl/crypto/cipher/e_ssl3.c',
-  'third_party/boringssl/crypto/cipher/e_tls.c',
-  'third_party/boringssl/crypto/cipher/tls_cbc.c',
-  'third_party/boringssl/crypto/cmac/cmac.c',
-  'third_party/boringssl/crypto/conf/conf.c',
-  'third_party/boringssl/crypto/cpu-aarch64-linux.c',
-  'third_party/boringssl/crypto/cpu-arm-linux.c',
-  'third_party/boringssl/crypto/cpu-arm.c',
-  'third_party/boringssl/crypto/cpu-intel.c',
-  'third_party/boringssl/crypto/cpu-ppc64le.c',
-  'third_party/boringssl/crypto/crypto.c',
-  'third_party/boringssl/crypto/curve25519/curve25519.c',
-  'third_party/boringssl/crypto/curve25519/spake25519.c',
-  'third_party/boringssl/crypto/curve25519/x25519-x86_64.c',
-  'third_party/boringssl/crypto/des/des.c',
-  'third_party/boringssl/crypto/dh/check.c',
-  'third_party/boringssl/crypto/dh/dh.c',
-  'third_party/boringssl/crypto/dh/dh_asn1.c',
-  'third_party/boringssl/crypto/dh/params.c',
-  'third_party/boringssl/crypto/digest/digest.c',
-  'third_party/boringssl/crypto/digest/digests.c',
-  'third_party/boringssl/crypto/dsa/dsa.c',
-  'third_party/boringssl/crypto/dsa/dsa_asn1.c',
-  'third_party/boringssl/crypto/ec/ec.c',
-  'third_party/boringssl/crypto/ec/ec_asn1.c',
-  'third_party/boringssl/crypto/ec/ec_key.c',
-  'third_party/boringssl/crypto/ec/ec_montgomery.c',
-  'third_party/boringssl/crypto/ec/oct.c',
-  'third_party/boringssl/crypto/ec/p224-64.c',
-  'third_party/boringssl/crypto/ec/p256-64.c',
-  'third_party/boringssl/crypto/ec/p256-x86_64.c',
-  'third_party/boringssl/crypto/ec/simple.c',
-  'third_party/boringssl/crypto/ec/util-64.c',
-  'third_party/boringssl/crypto/ec/wnaf.c',
-  'third_party/boringssl/crypto/ecdh/ecdh.c',
-  'third_party/boringssl/crypto/ecdsa/ecdsa.c',
-  'third_party/boringssl/crypto/ecdsa/ecdsa_asn1.c',
-  'third_party/boringssl/crypto/engine/engine.c',
-  'third_party/boringssl/crypto/err/err.c',
-  'third_party/boringssl/crypto/evp/digestsign.c',
-  'third_party/boringssl/crypto/evp/evp.c',
-  'third_party/boringssl/crypto/evp/evp_asn1.c',
-  'third_party/boringssl/crypto/evp/evp_ctx.c',
-  'third_party/boringssl/crypto/evp/p_dsa_asn1.c',
-  'third_party/boringssl/crypto/evp/p_ec.c',
-  'third_party/boringssl/crypto/evp/p_ec_asn1.c',
-  'third_party/boringssl/crypto/evp/p_rsa.c',
-  'third_party/boringssl/crypto/evp/p_rsa_asn1.c',
-  'third_party/boringssl/crypto/evp/pbkdf.c',
-  'third_party/boringssl/crypto/evp/print.c',
-  'third_party/boringssl/crypto/evp/sign.c',
-  'third_party/boringssl/crypto/ex_data.c',
-  'third_party/boringssl/crypto/hkdf/hkdf.c',
-  'third_party/boringssl/crypto/hmac/hmac.c',
-  'third_party/boringssl/crypto/lhash/lhash.c',
-  'third_party/boringssl/crypto/md4/md4.c',
-  'third_party/boringssl/crypto/md5/md5.c',
-  'third_party/boringssl/crypto/mem.c',
-  'third_party/boringssl/crypto/modes/cbc.c',
-  'third_party/boringssl/crypto/modes/cfb.c',
-  'third_party/boringssl/crypto/modes/ctr.c',
-  'third_party/boringssl/crypto/modes/gcm.c',
-  'third_party/boringssl/crypto/modes/ofb.c',
-  'third_party/boringssl/crypto/modes/polyval.c',
-  'third_party/boringssl/crypto/obj/obj.c',
-  'third_party/boringssl/crypto/obj/obj_xref.c',
-  'third_party/boringssl/crypto/pem/pem_all.c',
-  'third_party/boringssl/crypto/pem/pem_info.c',
-  'third_party/boringssl/crypto/pem/pem_lib.c',
-  'third_party/boringssl/crypto/pem/pem_oth.c',
-  'third_party/boringssl/crypto/pem/pem_pk8.c',
-  'third_party/boringssl/crypto/pem/pem_pkey.c',
-  'third_party/boringssl/crypto/pem/pem_x509.c',
-  'third_party/boringssl/crypto/pem/pem_xaux.c',
-  'third_party/boringssl/crypto/pkcs8/p5_pbev2.c',
-  'third_party/boringssl/crypto/pkcs8/p8_pkey.c',
-  'third_party/boringssl/crypto/pkcs8/pkcs8.c',
-  'third_party/boringssl/crypto/poly1305/poly1305.c',
-  'third_party/boringssl/crypto/poly1305/poly1305_arm.c',
-  'third_party/boringssl/crypto/poly1305/poly1305_vec.c',
-  'third_party/boringssl/crypto/pool/pool.c',
-  'third_party/boringssl/crypto/rand/deterministic.c',
-  'third_party/boringssl/crypto/rand/fuchsia.c',
-  'third_party/boringssl/crypto/rand/rand.c',
-  'third_party/boringssl/crypto/rand/urandom.c',
-  'third_party/boringssl/crypto/rand/windows.c',
-  'third_party/boringssl/crypto/rc4/rc4.c',
-  'third_party/boringssl/crypto/refcount_c11.c',
-  'third_party/boringssl/crypto/refcount_lock.c',
-  'third_party/boringssl/crypto/rsa/blinding.c',
-  'third_party/boringssl/crypto/rsa/padding.c',
-  'third_party/boringssl/crypto/rsa/rsa.c',
-  'third_party/boringssl/crypto/rsa/rsa_asn1.c',
-  'third_party/boringssl/crypto/rsa/rsa_impl.c',
-  'third_party/boringssl/crypto/sha/sha1-altivec.c',
-  'third_party/boringssl/crypto/sha/sha1.c',
-  'third_party/boringssl/crypto/sha/sha256.c',
-  'third_party/boringssl/crypto/sha/sha512.c',
-  'third_party/boringssl/crypto/stack/stack.c',
-  'third_party/boringssl/crypto/thread.c',
-  'third_party/boringssl/crypto/thread_none.c',
-  'third_party/boringssl/crypto/thread_pthread.c',
-  'third_party/boringssl/crypto/thread_win.c',
-  'third_party/boringssl/crypto/x509/a_digest.c',
-  'third_party/boringssl/crypto/x509/a_sign.c',
-  'third_party/boringssl/crypto/x509/a_strex.c',
-  'third_party/boringssl/crypto/x509/a_verify.c',
-  'third_party/boringssl/crypto/x509/algorithm.c',
-  'third_party/boringssl/crypto/x509/asn1_gen.c',
-  'third_party/boringssl/crypto/x509/by_dir.c',
-  'third_party/boringssl/crypto/x509/by_file.c',
-  'third_party/boringssl/crypto/x509/i2d_pr.c',
-  'third_party/boringssl/crypto/x509/pkcs7.c',
-  'third_party/boringssl/crypto/x509/rsa_pss.c',
-  'third_party/boringssl/crypto/x509/t_crl.c',
-  'third_party/boringssl/crypto/x509/t_req.c',
-  'third_party/boringssl/crypto/x509/t_x509.c',
-  'third_party/boringssl/crypto/x509/t_x509a.c',
-  'third_party/boringssl/crypto/x509/x509.c',
-  'third_party/boringssl/crypto/x509/x509_att.c',
-  'third_party/boringssl/crypto/x509/x509_cmp.c',
-  'third_party/boringssl/crypto/x509/x509_d2.c',
-  'third_party/boringssl/crypto/x509/x509_def.c',
-  'third_party/boringssl/crypto/x509/x509_ext.c',
-  'third_party/boringssl/crypto/x509/x509_lu.c',
-  'third_party/boringssl/crypto/x509/x509_obj.c',
-  'third_party/boringssl/crypto/x509/x509_r2x.c',
-  'third_party/boringssl/crypto/x509/x509_req.c',
-  'third_party/boringssl/crypto/x509/x509_set.c',
-  'third_party/boringssl/crypto/x509/x509_trs.c',
-  'third_party/boringssl/crypto/x509/x509_txt.c',
-  'third_party/boringssl/crypto/x509/x509_v3.c',
-  'third_party/boringssl/crypto/x509/x509_vfy.c',
-  'third_party/boringssl/crypto/x509/x509_vpm.c',
-  'third_party/boringssl/crypto/x509/x509cset.c',
-  'third_party/boringssl/crypto/x509/x509name.c',
-  'third_party/boringssl/crypto/x509/x509rset.c',
-  'third_party/boringssl/crypto/x509/x509spki.c',
-  'third_party/boringssl/crypto/x509/x509type.c',
-  'third_party/boringssl/crypto/x509/x_algor.c',
-  'third_party/boringssl/crypto/x509/x_all.c',
-  'third_party/boringssl/crypto/x509/x_attrib.c',
-  'third_party/boringssl/crypto/x509/x_crl.c',
-  'third_party/boringssl/crypto/x509/x_exten.c',
-  'third_party/boringssl/crypto/x509/x_info.c',
-  'third_party/boringssl/crypto/x509/x_name.c',
-  'third_party/boringssl/crypto/x509/x_pkey.c',
-  'third_party/boringssl/crypto/x509/x_pubkey.c',
-  'third_party/boringssl/crypto/x509/x_req.c',
-  'third_party/boringssl/crypto/x509/x_sig.c',
-  'third_party/boringssl/crypto/x509/x_spki.c',
-  'third_party/boringssl/crypto/x509/x_val.c',
-  'third_party/boringssl/crypto/x509/x_x509.c',
-  'third_party/boringssl/crypto/x509/x_x509a.c',
-  'third_party/boringssl/crypto/x509v3/pcy_cache.c',
-  'third_party/boringssl/crypto/x509v3/pcy_data.c',
-  'third_party/boringssl/crypto/x509v3/pcy_lib.c',
-  'third_party/boringssl/crypto/x509v3/pcy_map.c',
-  'third_party/boringssl/crypto/x509v3/pcy_node.c',
-  'third_party/boringssl/crypto/x509v3/pcy_tree.c',
-  'third_party/boringssl/crypto/x509v3/v3_akey.c',
-  'third_party/boringssl/crypto/x509v3/v3_akeya.c',
-  'third_party/boringssl/crypto/x509v3/v3_alt.c',
-  'third_party/boringssl/crypto/x509v3/v3_bcons.c',
-  'third_party/boringssl/crypto/x509v3/v3_bitst.c',
-  'third_party/boringssl/crypto/x509v3/v3_conf.c',
-  'third_party/boringssl/crypto/x509v3/v3_cpols.c',
-  'third_party/boringssl/crypto/x509v3/v3_crld.c',
-  'third_party/boringssl/crypto/x509v3/v3_enum.c',
-  'third_party/boringssl/crypto/x509v3/v3_extku.c',
-  'third_party/boringssl/crypto/x509v3/v3_genn.c',
-  'third_party/boringssl/crypto/x509v3/v3_ia5.c',
-  'third_party/boringssl/crypto/x509v3/v3_info.c',
-  'third_party/boringssl/crypto/x509v3/v3_int.c',
-  'third_party/boringssl/crypto/x509v3/v3_lib.c',
-  'third_party/boringssl/crypto/x509v3/v3_ncons.c',
-  'third_party/boringssl/crypto/x509v3/v3_pci.c',
-  'third_party/boringssl/crypto/x509v3/v3_pcia.c',
-  'third_party/boringssl/crypto/x509v3/v3_pcons.c',
-  'third_party/boringssl/crypto/x509v3/v3_pku.c',
-  'third_party/boringssl/crypto/x509v3/v3_pmaps.c',
-  'third_party/boringssl/crypto/x509v3/v3_prn.c',
-  'third_party/boringssl/crypto/x509v3/v3_purp.c',
-  'third_party/boringssl/crypto/x509v3/v3_skey.c',
-  'third_party/boringssl/crypto/x509v3/v3_sxnet.c',
-  'third_party/boringssl/crypto/x509v3/v3_utl.c',
-  'third_party/boringssl/ssl/bio_ssl.c',
-  'third_party/boringssl/ssl/custom_extensions.c',
-  'third_party/boringssl/ssl/d1_both.c',
-  'third_party/boringssl/ssl/d1_lib.c',
-  'third_party/boringssl/ssl/d1_pkt.c',
-  'third_party/boringssl/ssl/d1_srtp.c',
-  'third_party/boringssl/ssl/dtls_method.c',
-  'third_party/boringssl/ssl/dtls_record.c',
-  'third_party/boringssl/ssl/handshake_client.c',
-  'third_party/boringssl/ssl/handshake_server.c',
-  'third_party/boringssl/ssl/s3_both.c',
-  'third_party/boringssl/ssl/s3_lib.c',
-  'third_party/boringssl/ssl/s3_pkt.c',
-  'third_party/boringssl/ssl/ssl_aead_ctx.c',
-  'third_party/boringssl/ssl/ssl_asn1.c',
-  'third_party/boringssl/ssl/ssl_buffer.c',
-  'third_party/boringssl/ssl/ssl_cert.c',
-  'third_party/boringssl/ssl/ssl_cipher.c',
-  'third_party/boringssl/ssl/ssl_ecdh.c',
-  'third_party/boringssl/ssl/ssl_file.c',
-  'third_party/boringssl/ssl/ssl_lib.c',
-  'third_party/boringssl/ssl/ssl_privkey.c',
-  'third_party/boringssl/ssl/ssl_privkey_cc.cc',
-  'third_party/boringssl/ssl/ssl_session.c',
-  'third_party/boringssl/ssl/ssl_stat.c',
-  'third_party/boringssl/ssl/ssl_transcript.c',
-  'third_party/boringssl/ssl/ssl_x509.c',
-  'third_party/boringssl/ssl/t1_enc.c',
-  'third_party/boringssl/ssl/t1_lib.c',
-  'third_party/boringssl/ssl/tls13_both.c',
-  'third_party/boringssl/ssl/tls13_client.c',
-  'third_party/boringssl/ssl/tls13_enc.c',
-  'third_party/boringssl/ssl/tls13_server.c',
-  'third_party/boringssl/ssl/tls_method.c',
-  'third_party/boringssl/ssl/tls_record.c',
-  'third_party/zlib/adler32.c',
-  'third_party/zlib/compress.c',
-  'third_party/zlib/crc32.c',
-  'third_party/zlib/deflate.c',
-  'third_party/zlib/gzclose.c',
-  'third_party/zlib/gzlib.c',
-  'third_party/zlib/gzread.c',
-  'third_party/zlib/gzwrite.c',
-  'third_party/zlib/infback.c',
-  'third_party/zlib/inffast.c',
-  'third_party/zlib/inflate.c',
-  'third_party/zlib/inftrees.c',
-  'third_party/zlib/trees.c',
-  'third_party/zlib/uncompr.c',
-  'third_party/zlib/zutil.c',
-  'third_party/cares/cares/ares__close_sockets.c',
-  'third_party/cares/cares/ares__get_hostent.c',
-  'third_party/cares/cares/ares__read_line.c',
-  'third_party/cares/cares/ares__timeval.c',
-  'third_party/cares/cares/ares_cancel.c',
-  'third_party/cares/cares/ares_create_query.c',
-  'third_party/cares/cares/ares_data.c',
-  'third_party/cares/cares/ares_destroy.c',
-  'third_party/cares/cares/ares_expand_name.c',
-  'third_party/cares/cares/ares_expand_string.c',
-  'third_party/cares/cares/ares_fds.c',
-  'third_party/cares/cares/ares_free_hostent.c',
-  'third_party/cares/cares/ares_free_string.c',
-  'third_party/cares/cares/ares_getenv.c',
-  'third_party/cares/cares/ares_gethostbyaddr.c',
-  'third_party/cares/cares/ares_gethostbyname.c',
-  'third_party/cares/cares/ares_getnameinfo.c',
-  'third_party/cares/cares/ares_getopt.c',
-  'third_party/cares/cares/ares_getsock.c',
-  'third_party/cares/cares/ares_init.c',
-  'third_party/cares/cares/ares_library_init.c',
-  'third_party/cares/cares/ares_llist.c',
-  'third_party/cares/cares/ares_mkquery.c',
-  'third_party/cares/cares/ares_nowarn.c',
-  'third_party/cares/cares/ares_options.c',
-  'third_party/cares/cares/ares_parse_a_reply.c',
-  'third_party/cares/cares/ares_parse_aaaa_reply.c',
-  'third_party/cares/cares/ares_parse_mx_reply.c',
-  'third_party/cares/cares/ares_parse_naptr_reply.c',
-  'third_party/cares/cares/ares_parse_ns_reply.c',
-  'third_party/cares/cares/ares_parse_ptr_reply.c',
-  'third_party/cares/cares/ares_parse_soa_reply.c',
-  'third_party/cares/cares/ares_parse_srv_reply.c',
-  'third_party/cares/cares/ares_parse_txt_reply.c',
-  'third_party/cares/cares/ares_platform.c',
-  'third_party/cares/cares/ares_process.c',
-  'third_party/cares/cares/ares_query.c',
-  'third_party/cares/cares/ares_search.c',
-  'third_party/cares/cares/ares_send.c',
-  'third_party/cares/cares/ares_strcasecmp.c',
-  'third_party/cares/cares/ares_strdup.c',
-  'third_party/cares/cares/ares_strerror.c',
-  'third_party/cares/cares/ares_timeout.c',
-  'third_party/cares/cares/ares_version.c',
-  'third_party/cares/cares/ares_writev.c',
-  'third_party/cares/cares/bitncmp.c',
-  'third_party/cares/cares/inet_net_pton.c',
-  'third_party/cares/cares/inet_ntop.c',
-  'third_party/cares/cares/windows_port.c',
+    'src/core/lib/profiling/basic_timers.cc',
+    'src/core/lib/profiling/stap_timers.cc',
+    'src/core/lib/support/alloc.cc',
+    'src/core/lib/support/arena.cc',
+    'src/core/lib/support/atm.cc',
+    'src/core/lib/support/avl.cc',
+    'src/core/lib/support/cmdline.cc',
+    'src/core/lib/support/cpu_iphone.cc',
+    'src/core/lib/support/cpu_linux.cc',
+    'src/core/lib/support/cpu_posix.cc',
+    'src/core/lib/support/cpu_windows.cc',
+    'src/core/lib/support/env_linux.cc',
+    'src/core/lib/support/env_posix.cc',
+    'src/core/lib/support/env_windows.cc',
+    'src/core/lib/support/fork.cc',
+    'src/core/lib/support/host_port.cc',
+    'src/core/lib/support/log.cc',
+    'src/core/lib/support/log_android.cc',
+    'src/core/lib/support/log_linux.cc',
+    'src/core/lib/support/log_posix.cc',
+    'src/core/lib/support/log_windows.cc',
+    'src/core/lib/support/mpscq.cc',
+    'src/core/lib/support/murmur_hash.cc',
+    'src/core/lib/support/string.cc',
+    'src/core/lib/support/string_posix.cc',
+    'src/core/lib/support/string_util_windows.cc',
+    'src/core/lib/support/string_windows.cc',
+    'src/core/lib/support/subprocess_posix.cc',
+    'src/core/lib/support/subprocess_windows.cc',
+    'src/core/lib/support/sync.cc',
+    'src/core/lib/support/sync_posix.cc',
+    'src/core/lib/support/sync_windows.cc',
+    'src/core/lib/support/thd.cc',
+    'src/core/lib/support/thd_posix.cc',
+    'src/core/lib/support/thd_windows.cc',
+    'src/core/lib/support/time.cc',
+    'src/core/lib/support/time_posix.cc',
+    'src/core/lib/support/time_precise.cc',
+    'src/core/lib/support/time_windows.cc',
+    'src/core/lib/support/tls_pthread.cc',
+    'src/core/lib/support/tmpfile_msys.cc',
+    'src/core/lib/support/tmpfile_posix.cc',
+    'src/core/lib/support/tmpfile_windows.cc',
+    'src/core/lib/support/wrap_memcpy.cc',
+    'src/core/lib/surface/init.cc',
+    'src/core/lib/backoff/backoff.cc',
+    'src/core/lib/channel/channel_args.cc',
+    'src/core/lib/channel/channel_stack.cc',
+    'src/core/lib/channel/channel_stack_builder.cc',
+    'src/core/lib/channel/connected_channel.cc',
+    'src/core/lib/channel/handshaker.cc',
+    'src/core/lib/channel/handshaker_factory.cc',
+    'src/core/lib/channel/handshaker_registry.cc',
+    'src/core/lib/compression/compression.cc',
+    'src/core/lib/compression/message_compress.cc',
+    'src/core/lib/compression/stream_compression.cc',
+    'src/core/lib/compression/stream_compression_gzip.cc',
+    'src/core/lib/compression/stream_compression_identity.cc',
+    'src/core/lib/debug/stats.cc',
+    'src/core/lib/debug/stats_data.cc',
+    'src/core/lib/http/format_request.cc',
+    'src/core/lib/http/httpcli.cc',
+    'src/core/lib/http/parser.cc',
+    'src/core/lib/iomgr/call_combiner.cc',
+    'src/core/lib/iomgr/combiner.cc',
+    'src/core/lib/iomgr/endpoint.cc',
+    'src/core/lib/iomgr/endpoint_pair_posix.cc',
+    'src/core/lib/iomgr/endpoint_pair_uv.cc',
+    'src/core/lib/iomgr/endpoint_pair_windows.cc',
+    'src/core/lib/iomgr/error.cc',
+    'src/core/lib/iomgr/ev_epoll1_linux.cc',
+    'src/core/lib/iomgr/ev_epollex_linux.cc',
+    'src/core/lib/iomgr/ev_epollsig_linux.cc',
+    'src/core/lib/iomgr/ev_poll_posix.cc',
+    'src/core/lib/iomgr/ev_posix.cc',
+    'src/core/lib/iomgr/ev_windows.cc',
+    'src/core/lib/iomgr/exec_ctx.cc',
+    'src/core/lib/iomgr/executor.cc',
+    'src/core/lib/iomgr/fork_posix.cc',
+    'src/core/lib/iomgr/fork_windows.cc',
+    'src/core/lib/iomgr/gethostname_fallback.cc',
+    'src/core/lib/iomgr/gethostname_host_name_max.cc',
+    'src/core/lib/iomgr/gethostname_sysconf.cc',
+    'src/core/lib/iomgr/iocp_windows.cc',
+    'src/core/lib/iomgr/iomgr.cc',
+    'src/core/lib/iomgr/iomgr_posix.cc',
+    'src/core/lib/iomgr/iomgr_uv.cc',
+    'src/core/lib/iomgr/iomgr_windows.cc',
+    'src/core/lib/iomgr/is_epollexclusive_available.cc',
+    'src/core/lib/iomgr/load_file.cc',
+    'src/core/lib/iomgr/lockfree_event.cc',
+    'src/core/lib/iomgr/network_status_tracker.cc',
+    'src/core/lib/iomgr/polling_entity.cc',
+    'src/core/lib/iomgr/pollset_set_uv.cc',
+    'src/core/lib/iomgr/pollset_set_windows.cc',
+    'src/core/lib/iomgr/pollset_uv.cc',
+    'src/core/lib/iomgr/pollset_windows.cc',
+    'src/core/lib/iomgr/resolve_address_posix.cc',
+    'src/core/lib/iomgr/resolve_address_uv.cc',
+    'src/core/lib/iomgr/resolve_address_windows.cc',
+    'src/core/lib/iomgr/resource_quota.cc',
+    'src/core/lib/iomgr/sockaddr_utils.cc',
+    'src/core/lib/iomgr/socket_factory_posix.cc',
+    'src/core/lib/iomgr/socket_mutator.cc',
+    'src/core/lib/iomgr/socket_utils_common_posix.cc',
+    'src/core/lib/iomgr/socket_utils_linux.cc',
+    'src/core/lib/iomgr/socket_utils_posix.cc',
+    'src/core/lib/iomgr/socket_utils_uv.cc',
+    'src/core/lib/iomgr/socket_utils_windows.cc',
+    'src/core/lib/iomgr/socket_windows.cc',
+    'src/core/lib/iomgr/tcp_client_posix.cc',
+    'src/core/lib/iomgr/tcp_client_uv.cc',
+    'src/core/lib/iomgr/tcp_client_windows.cc',
+    'src/core/lib/iomgr/tcp_posix.cc',
+    'src/core/lib/iomgr/tcp_server_posix.cc',
+    'src/core/lib/iomgr/tcp_server_utils_posix_common.cc',
+    'src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.cc',
+    'src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.cc',
+    'src/core/lib/iomgr/tcp_server_uv.cc',
+    'src/core/lib/iomgr/tcp_server_windows.cc',
+    'src/core/lib/iomgr/tcp_uv.cc',
+    'src/core/lib/iomgr/tcp_windows.cc',
+    'src/core/lib/iomgr/time_averaged_stats.cc',
+    'src/core/lib/iomgr/timer_generic.cc',
+    'src/core/lib/iomgr/timer_heap.cc',
+    'src/core/lib/iomgr/timer_manager.cc',
+    'src/core/lib/iomgr/timer_uv.cc',
+    'src/core/lib/iomgr/udp_server.cc',
+    'src/core/lib/iomgr/unix_sockets_posix.cc',
+    'src/core/lib/iomgr/unix_sockets_posix_noop.cc',
+    'src/core/lib/iomgr/wakeup_fd_cv.cc',
+    'src/core/lib/iomgr/wakeup_fd_eventfd.cc',
+    'src/core/lib/iomgr/wakeup_fd_nospecial.cc',
+    'src/core/lib/iomgr/wakeup_fd_pipe.cc',
+    'src/core/lib/iomgr/wakeup_fd_posix.cc',
+    'src/core/lib/json/json.cc',
+    'src/core/lib/json/json_reader.cc',
+    'src/core/lib/json/json_string.cc',
+    'src/core/lib/json/json_writer.cc',
+    'src/core/lib/slice/b64.cc',
+    'src/core/lib/slice/percent_encoding.cc',
+    'src/core/lib/slice/slice.cc',
+    'src/core/lib/slice/slice_buffer.cc',
+    'src/core/lib/slice/slice_hash_table.cc',
+    'src/core/lib/slice/slice_intern.cc',
+    'src/core/lib/slice/slice_string_helpers.cc',
+    'src/core/lib/surface/alarm.cc',
+    'src/core/lib/surface/api_trace.cc',
+    'src/core/lib/surface/byte_buffer.cc',
+    'src/core/lib/surface/byte_buffer_reader.cc',
+    'src/core/lib/surface/call.cc',
+    'src/core/lib/surface/call_details.cc',
+    'src/core/lib/surface/call_log_batch.cc',
+    'src/core/lib/surface/channel.cc',
+    'src/core/lib/surface/channel_init.cc',
+    'src/core/lib/surface/channel_ping.cc',
+    'src/core/lib/surface/channel_stack_type.cc',
+    'src/core/lib/surface/completion_queue.cc',
+    'src/core/lib/surface/completion_queue_factory.cc',
+    'src/core/lib/surface/event_string.cc',
+    'src/core/lib/surface/lame_client.cc',
+    'src/core/lib/surface/metadata_array.cc',
+    'src/core/lib/surface/server.cc',
+    'src/core/lib/surface/validate_metadata.cc',
+    'src/core/lib/surface/version.cc',
+    'src/core/lib/transport/bdp_estimator.cc',
+    'src/core/lib/transport/byte_stream.cc',
+    'src/core/lib/transport/connectivity_state.cc',
+    'src/core/lib/transport/error_utils.cc',
+    'src/core/lib/transport/metadata.cc',
+    'src/core/lib/transport/metadata_batch.cc',
+    'src/core/lib/transport/pid_controller.cc',
+    'src/core/lib/transport/service_config.cc',
+    'src/core/lib/transport/static_metadata.cc',
+    'src/core/lib/transport/status_conversion.cc',
+    'src/core/lib/transport/timeout_encoding.cc',
+    'src/core/lib/transport/transport.cc',
+    'src/core/lib/transport/transport_op_string.cc',
+    'src/core/lib/debug/trace.cc',
+    'src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.cc',
+    'src/core/ext/transport/chttp2/transport/bin_decoder.cc',
+    'src/core/ext/transport/chttp2/transport/bin_encoder.cc',
+    'src/core/ext/transport/chttp2/transport/chttp2_plugin.cc',
+    'src/core/ext/transport/chttp2/transport/chttp2_transport.cc',
+    'src/core/ext/transport/chttp2/transport/flow_control.cc',
+    'src/core/ext/transport/chttp2/transport/frame_data.cc',
+    'src/core/ext/transport/chttp2/transport/frame_goaway.cc',
+    'src/core/ext/transport/chttp2/transport/frame_ping.cc',
+    'src/core/ext/transport/chttp2/transport/frame_rst_stream.cc',
+    'src/core/ext/transport/chttp2/transport/frame_settings.cc',
+    'src/core/ext/transport/chttp2/transport/frame_window_update.cc',
+    'src/core/ext/transport/chttp2/transport/hpack_encoder.cc',
+    'src/core/ext/transport/chttp2/transport/hpack_parser.cc',
+    'src/core/ext/transport/chttp2/transport/hpack_table.cc',
+    'src/core/ext/transport/chttp2/transport/http2_settings.cc',
+    'src/core/ext/transport/chttp2/transport/huffsyms.cc',
+    'src/core/ext/transport/chttp2/transport/incoming_metadata.cc',
+    'src/core/ext/transport/chttp2/transport/parsing.cc',
+    'src/core/ext/transport/chttp2/transport/stream_lists.cc',
+    'src/core/ext/transport/chttp2/transport/stream_map.cc',
+    'src/core/ext/transport/chttp2/transport/varint.cc',
+    'src/core/ext/transport/chttp2/transport/writing.cc',
+    'src/core/ext/transport/chttp2/alpn/alpn.cc',
+    'src/core/ext/filters/http/client/http_client_filter.cc',
+    'src/core/ext/filters/http/http_filters_plugin.cc',
+    'src/core/ext/filters/http/message_compress/message_compress_filter.cc',
+    'src/core/ext/filters/http/server/http_server_filter.cc',
+    'src/core/lib/http/httpcli_security_connector.cc',
+    'src/core/lib/security/context/security_context.cc',
+    'src/core/lib/security/credentials/composite/composite_credentials.cc',
+    'src/core/lib/security/credentials/credentials.cc',
+    'src/core/lib/security/credentials/credentials_metadata.cc',
+    'src/core/lib/security/credentials/fake/fake_credentials.cc',
+    'src/core/lib/security/credentials/google_default/credentials_generic.cc',
+    'src/core/lib/security/credentials/google_default/google_default_credentials.cc',
+    'src/core/lib/security/credentials/iam/iam_credentials.cc',
+    'src/core/lib/security/credentials/jwt/json_token.cc',
+    'src/core/lib/security/credentials/jwt/jwt_credentials.cc',
+    'src/core/lib/security/credentials/jwt/jwt_verifier.cc',
+    'src/core/lib/security/credentials/oauth2/oauth2_credentials.cc',
+    'src/core/lib/security/credentials/plugin/plugin_credentials.cc',
+    'src/core/lib/security/credentials/ssl/ssl_credentials.cc',
+    'src/core/lib/security/transport/client_auth_filter.cc',
+    'src/core/lib/security/transport/lb_targets_info.cc',
+    'src/core/lib/security/transport/secure_endpoint.cc',
+    'src/core/lib/security/transport/security_connector.cc',
+    'src/core/lib/security/transport/security_handshaker.cc',
+    'src/core/lib/security/transport/server_auth_filter.cc',
+    'src/core/lib/security/transport/tsi_error.cc',
+    'src/core/lib/security/util/json_util.cc',
+    'src/core/lib/surface/init_secure.cc',
+    'src/core/tsi/fake_transport_security.cc',
+    'src/core/tsi/gts_transport_security.cc',
+    'src/core/tsi/ssl_transport_security.cc',
+    'src/core/tsi/transport_security_grpc.cc',
+    'src/core/tsi/transport_security.cc',
+    'src/core/tsi/transport_security_adapter.cc',
+    'src/core/ext/transport/chttp2/server/chttp2_server.cc',
+    'src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc',
+    'src/core/ext/filters/client_channel/backup_poller.cc',
+    'src/core/ext/filters/client_channel/channel_connectivity.cc',
+    'src/core/ext/filters/client_channel/client_channel.cc',
+    'src/core/ext/filters/client_channel/client_channel_factory.cc',
+    'src/core/ext/filters/client_channel/client_channel_plugin.cc',
+    'src/core/ext/filters/client_channel/connector.cc',
+    'src/core/ext/filters/client_channel/http_connect_handshaker.cc',
+    'src/core/ext/filters/client_channel/http_proxy.cc',
+    'src/core/ext/filters/client_channel/lb_policy.cc',
+    'src/core/ext/filters/client_channel/lb_policy_factory.cc',
+    'src/core/ext/filters/client_channel/lb_policy_registry.cc',
+    'src/core/ext/filters/client_channel/parse_address.cc',
+    'src/core/ext/filters/client_channel/proxy_mapper.cc',
+    'src/core/ext/filters/client_channel/proxy_mapper_registry.cc',
+    'src/core/ext/filters/client_channel/resolver.cc',
+    'src/core/ext/filters/client_channel/resolver_factory.cc',
+    'src/core/ext/filters/client_channel/resolver_registry.cc',
+    'src/core/ext/filters/client_channel/retry_throttle.cc',
+    'src/core/ext/filters/client_channel/subchannel.cc',
+    'src/core/ext/filters/client_channel/subchannel_index.cc',
+    'src/core/ext/filters/client_channel/uri_parser.cc',
+    'src/core/ext/filters/deadline/deadline_filter.cc',
+    'src/core/ext/transport/chttp2/client/chttp2_connector.cc',
+    'src/core/ext/transport/chttp2/server/insecure/server_chttp2.cc',
+    'src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.cc',
+    'src/core/ext/transport/chttp2/client/insecure/channel_create.cc',
+    'src/core/ext/transport/chttp2/client/insecure/channel_create_posix.cc',
+    'src/core/ext/transport/inproc/inproc_plugin.cc',
+    'src/core/ext/transport/inproc/inproc_transport.cc',
+    'src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc',
+    'src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc',
+    'src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel_secure.cc',
+    'src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_client_stats.cc',
+    'src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc',
+    'src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c',
+    'third_party/nanopb/pb_common.c',
+    'third_party/nanopb/pb_decode.c',
+    'third_party/nanopb/pb_encode.c',
+    'src/core/ext/filters/client_channel/resolver/fake/fake_resolver.cc',
+    'src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc',
+    'src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc',
+    'src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc',
+    'src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc',
+    'src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc',
+    'src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc',
+    'src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper_fallback.cc',
+    'src/core/ext/filters/client_channel/resolver/dns/native/dns_resolver.cc',
+    'src/core/ext/filters/client_channel/resolver/sockaddr/sockaddr_resolver.cc',
+    'src/core/ext/filters/load_reporting/server_load_reporting_filter.cc',
+    'src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc',
+    'src/core/ext/census/grpc_context.cc',
+    'src/core/ext/filters/max_age/max_age_filter.cc',
+    'src/core/ext/filters/message_size/message_size_filter.cc',
+    'src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc',
+    'src/core/ext/filters/workarounds/workaround_utils.cc',
+    'src/core/plugin_registry/grpc_plugin_registry.cc',
+    'src/boringssl/err_data.c',
+    'third_party/boringssl/crypto/aes/aes.c',
+    'third_party/boringssl/crypto/aes/key_wrap.c',
+    'third_party/boringssl/crypto/aes/mode_wrappers.c',
+    'third_party/boringssl/crypto/asn1/a_bitstr.c',
+    'third_party/boringssl/crypto/asn1/a_bool.c',
+    'third_party/boringssl/crypto/asn1/a_d2i_fp.c',
+    'third_party/boringssl/crypto/asn1/a_dup.c',
+    'third_party/boringssl/crypto/asn1/a_enum.c',
+    'third_party/boringssl/crypto/asn1/a_gentm.c',
+    'third_party/boringssl/crypto/asn1/a_i2d_fp.c',
+    'third_party/boringssl/crypto/asn1/a_int.c',
+    'third_party/boringssl/crypto/asn1/a_mbstr.c',
+    'third_party/boringssl/crypto/asn1/a_object.c',
+    'third_party/boringssl/crypto/asn1/a_octet.c',
+    'third_party/boringssl/crypto/asn1/a_print.c',
+    'third_party/boringssl/crypto/asn1/a_strnid.c',
+    'third_party/boringssl/crypto/asn1/a_time.c',
+    'third_party/boringssl/crypto/asn1/a_type.c',
+    'third_party/boringssl/crypto/asn1/a_utctm.c',
+    'third_party/boringssl/crypto/asn1/a_utf8.c',
+    'third_party/boringssl/crypto/asn1/asn1_lib.c',
+    'third_party/boringssl/crypto/asn1/asn1_par.c',
+    'third_party/boringssl/crypto/asn1/asn_pack.c',
+    'third_party/boringssl/crypto/asn1/f_enum.c',
+    'third_party/boringssl/crypto/asn1/f_int.c',
+    'third_party/boringssl/crypto/asn1/f_string.c',
+    'third_party/boringssl/crypto/asn1/t_bitst.c',
+    'third_party/boringssl/crypto/asn1/tasn_dec.c',
+    'third_party/boringssl/crypto/asn1/tasn_enc.c',
+    'third_party/boringssl/crypto/asn1/tasn_fre.c',
+    'third_party/boringssl/crypto/asn1/tasn_new.c',
+    'third_party/boringssl/crypto/asn1/tasn_typ.c',
+    'third_party/boringssl/crypto/asn1/tasn_utl.c',
+    'third_party/boringssl/crypto/asn1/time_support.c',
+    'third_party/boringssl/crypto/asn1/x_bignum.c',
+    'third_party/boringssl/crypto/asn1/x_long.c',
+    'third_party/boringssl/crypto/base64/base64.c',
+    'third_party/boringssl/crypto/bio/bio.c',
+    'third_party/boringssl/crypto/bio/bio_mem.c',
+    'third_party/boringssl/crypto/bio/connect.c',
+    'third_party/boringssl/crypto/bio/fd.c',
+    'third_party/boringssl/crypto/bio/file.c',
+    'third_party/boringssl/crypto/bio/hexdump.c',
+    'third_party/boringssl/crypto/bio/pair.c',
+    'third_party/boringssl/crypto/bio/printf.c',
+    'third_party/boringssl/crypto/bio/socket.c',
+    'third_party/boringssl/crypto/bio/socket_helper.c',
+    'third_party/boringssl/crypto/bn/add.c',
+    'third_party/boringssl/crypto/bn/asm/x86_64-gcc.c',
+    'third_party/boringssl/crypto/bn/bn.c',
+    'third_party/boringssl/crypto/bn/bn_asn1.c',
+    'third_party/boringssl/crypto/bn/cmp.c',
+    'third_party/boringssl/crypto/bn/convert.c',
+    'third_party/boringssl/crypto/bn/ctx.c',
+    'third_party/boringssl/crypto/bn/div.c',
+    'third_party/boringssl/crypto/bn/exponentiation.c',
+    'third_party/boringssl/crypto/bn/gcd.c',
+    'third_party/boringssl/crypto/bn/generic.c',
+    'third_party/boringssl/crypto/bn/kronecker.c',
+    'third_party/boringssl/crypto/bn/montgomery.c',
+    'third_party/boringssl/crypto/bn/montgomery_inv.c',
+    'third_party/boringssl/crypto/bn/mul.c',
+    'third_party/boringssl/crypto/bn/prime.c',
+    'third_party/boringssl/crypto/bn/random.c',
+    'third_party/boringssl/crypto/bn/rsaz_exp.c',
+    'third_party/boringssl/crypto/bn/shift.c',
+    'third_party/boringssl/crypto/bn/sqrt.c',
+    'third_party/boringssl/crypto/buf/buf.c',
+    'third_party/boringssl/crypto/bytestring/asn1_compat.c',
+    'third_party/boringssl/crypto/bytestring/ber.c',
+    'third_party/boringssl/crypto/bytestring/cbb.c',
+    'third_party/boringssl/crypto/bytestring/cbs.c',
+    'third_party/boringssl/crypto/chacha/chacha.c',
+    'third_party/boringssl/crypto/cipher/aead.c',
+    'third_party/boringssl/crypto/cipher/cipher.c',
+    'third_party/boringssl/crypto/cipher/derive_key.c',
+    'third_party/boringssl/crypto/cipher/e_aes.c',
+    'third_party/boringssl/crypto/cipher/e_chacha20poly1305.c',
+    'third_party/boringssl/crypto/cipher/e_des.c',
+    'third_party/boringssl/crypto/cipher/e_null.c',
+    'third_party/boringssl/crypto/cipher/e_rc2.c',
+    'third_party/boringssl/crypto/cipher/e_rc4.c',
+    'third_party/boringssl/crypto/cipher/e_ssl3.c',
+    'third_party/boringssl/crypto/cipher/e_tls.c',
+    'third_party/boringssl/crypto/cipher/tls_cbc.c',
+    'third_party/boringssl/crypto/cmac/cmac.c',
+    'third_party/boringssl/crypto/conf/conf.c',
+    'third_party/boringssl/crypto/cpu-aarch64-linux.c',
+    'third_party/boringssl/crypto/cpu-arm-linux.c',
+    'third_party/boringssl/crypto/cpu-arm.c',
+    'third_party/boringssl/crypto/cpu-intel.c',
+    'third_party/boringssl/crypto/cpu-ppc64le.c',
+    'third_party/boringssl/crypto/crypto.c',
+    'third_party/boringssl/crypto/curve25519/curve25519.c',
+    'third_party/boringssl/crypto/curve25519/spake25519.c',
+    'third_party/boringssl/crypto/curve25519/x25519-x86_64.c',
+    'third_party/boringssl/crypto/des/des.c',
+    'third_party/boringssl/crypto/dh/check.c',
+    'third_party/boringssl/crypto/dh/dh.c',
+    'third_party/boringssl/crypto/dh/dh_asn1.c',
+    'third_party/boringssl/crypto/dh/params.c',
+    'third_party/boringssl/crypto/digest/digest.c',
+    'third_party/boringssl/crypto/digest/digests.c',
+    'third_party/boringssl/crypto/dsa/dsa.c',
+    'third_party/boringssl/crypto/dsa/dsa_asn1.c',
+    'third_party/boringssl/crypto/ec/ec.c',
+    'third_party/boringssl/crypto/ec/ec_asn1.c',
+    'third_party/boringssl/crypto/ec/ec_key.c',
+    'third_party/boringssl/crypto/ec/ec_montgomery.c',
+    'third_party/boringssl/crypto/ec/oct.c',
+    'third_party/boringssl/crypto/ec/p224-64.c',
+    'third_party/boringssl/crypto/ec/p256-64.c',
+    'third_party/boringssl/crypto/ec/p256-x86_64.c',
+    'third_party/boringssl/crypto/ec/simple.c',
+    'third_party/boringssl/crypto/ec/util-64.c',
+    'third_party/boringssl/crypto/ec/wnaf.c',
+    'third_party/boringssl/crypto/ecdh/ecdh.c',
+    'third_party/boringssl/crypto/ecdsa/ecdsa.c',
+    'third_party/boringssl/crypto/ecdsa/ecdsa_asn1.c',
+    'third_party/boringssl/crypto/engine/engine.c',
+    'third_party/boringssl/crypto/err/err.c',
+    'third_party/boringssl/crypto/evp/digestsign.c',
+    'third_party/boringssl/crypto/evp/evp.c',
+    'third_party/boringssl/crypto/evp/evp_asn1.c',
+    'third_party/boringssl/crypto/evp/evp_ctx.c',
+    'third_party/boringssl/crypto/evp/p_dsa_asn1.c',
+    'third_party/boringssl/crypto/evp/p_ec.c',
+    'third_party/boringssl/crypto/evp/p_ec_asn1.c',
+    'third_party/boringssl/crypto/evp/p_rsa.c',
+    'third_party/boringssl/crypto/evp/p_rsa_asn1.c',
+    'third_party/boringssl/crypto/evp/pbkdf.c',
+    'third_party/boringssl/crypto/evp/print.c',
+    'third_party/boringssl/crypto/evp/sign.c',
+    'third_party/boringssl/crypto/ex_data.c',
+    'third_party/boringssl/crypto/hkdf/hkdf.c',
+    'third_party/boringssl/crypto/hmac/hmac.c',
+    'third_party/boringssl/crypto/lhash/lhash.c',
+    'third_party/boringssl/crypto/md4/md4.c',
+    'third_party/boringssl/crypto/md5/md5.c',
+    'third_party/boringssl/crypto/mem.c',
+    'third_party/boringssl/crypto/modes/cbc.c',
+    'third_party/boringssl/crypto/modes/cfb.c',
+    'third_party/boringssl/crypto/modes/ctr.c',
+    'third_party/boringssl/crypto/modes/gcm.c',
+    'third_party/boringssl/crypto/modes/ofb.c',
+    'third_party/boringssl/crypto/modes/polyval.c',
+    'third_party/boringssl/crypto/obj/obj.c',
+    'third_party/boringssl/crypto/obj/obj_xref.c',
+    'third_party/boringssl/crypto/pem/pem_all.c',
+    'third_party/boringssl/crypto/pem/pem_info.c',
+    'third_party/boringssl/crypto/pem/pem_lib.c',
+    'third_party/boringssl/crypto/pem/pem_oth.c',
+    'third_party/boringssl/crypto/pem/pem_pk8.c',
+    'third_party/boringssl/crypto/pem/pem_pkey.c',
+    'third_party/boringssl/crypto/pem/pem_x509.c',
+    'third_party/boringssl/crypto/pem/pem_xaux.c',
+    'third_party/boringssl/crypto/pkcs8/p5_pbev2.c',
+    'third_party/boringssl/crypto/pkcs8/p8_pkey.c',
+    'third_party/boringssl/crypto/pkcs8/pkcs8.c',
+    'third_party/boringssl/crypto/poly1305/poly1305.c',
+    'third_party/boringssl/crypto/poly1305/poly1305_arm.c',
+    'third_party/boringssl/crypto/poly1305/poly1305_vec.c',
+    'third_party/boringssl/crypto/pool/pool.c',
+    'third_party/boringssl/crypto/rand/deterministic.c',
+    'third_party/boringssl/crypto/rand/fuchsia.c',
+    'third_party/boringssl/crypto/rand/rand.c',
+    'third_party/boringssl/crypto/rand/urandom.c',
+    'third_party/boringssl/crypto/rand/windows.c',
+    'third_party/boringssl/crypto/rc4/rc4.c',
+    'third_party/boringssl/crypto/refcount_c11.c',
+    'third_party/boringssl/crypto/refcount_lock.c',
+    'third_party/boringssl/crypto/rsa/blinding.c',
+    'third_party/boringssl/crypto/rsa/padding.c',
+    'third_party/boringssl/crypto/rsa/rsa.c',
+    'third_party/boringssl/crypto/rsa/rsa_asn1.c',
+    'third_party/boringssl/crypto/rsa/rsa_impl.c',
+    'third_party/boringssl/crypto/sha/sha1-altivec.c',
+    'third_party/boringssl/crypto/sha/sha1.c',
+    'third_party/boringssl/crypto/sha/sha256.c',
+    'third_party/boringssl/crypto/sha/sha512.c',
+    'third_party/boringssl/crypto/stack/stack.c',
+    'third_party/boringssl/crypto/thread.c',
+    'third_party/boringssl/crypto/thread_none.c',
+    'third_party/boringssl/crypto/thread_pthread.c',
+    'third_party/boringssl/crypto/thread_win.c',
+    'third_party/boringssl/crypto/x509/a_digest.c',
+    'third_party/boringssl/crypto/x509/a_sign.c',
+    'third_party/boringssl/crypto/x509/a_strex.c',
+    'third_party/boringssl/crypto/x509/a_verify.c',
+    'third_party/boringssl/crypto/x509/algorithm.c',
+    'third_party/boringssl/crypto/x509/asn1_gen.c',
+    'third_party/boringssl/crypto/x509/by_dir.c',
+    'third_party/boringssl/crypto/x509/by_file.c',
+    'third_party/boringssl/crypto/x509/i2d_pr.c',
+    'third_party/boringssl/crypto/x509/pkcs7.c',
+    'third_party/boringssl/crypto/x509/rsa_pss.c',
+    'third_party/boringssl/crypto/x509/t_crl.c',
+    'third_party/boringssl/crypto/x509/t_req.c',
+    'third_party/boringssl/crypto/x509/t_x509.c',
+    'third_party/boringssl/crypto/x509/t_x509a.c',
+    'third_party/boringssl/crypto/x509/x509.c',
+    'third_party/boringssl/crypto/x509/x509_att.c',
+    'third_party/boringssl/crypto/x509/x509_cmp.c',
+    'third_party/boringssl/crypto/x509/x509_d2.c',
+    'third_party/boringssl/crypto/x509/x509_def.c',
+    'third_party/boringssl/crypto/x509/x509_ext.c',
+    'third_party/boringssl/crypto/x509/x509_lu.c',
+    'third_party/boringssl/crypto/x509/x509_obj.c',
+    'third_party/boringssl/crypto/x509/x509_r2x.c',
+    'third_party/boringssl/crypto/x509/x509_req.c',
+    'third_party/boringssl/crypto/x509/x509_set.c',
+    'third_party/boringssl/crypto/x509/x509_trs.c',
+    'third_party/boringssl/crypto/x509/x509_txt.c',
+    'third_party/boringssl/crypto/x509/x509_v3.c',
+    'third_party/boringssl/crypto/x509/x509_vfy.c',
+    'third_party/boringssl/crypto/x509/x509_vpm.c',
+    'third_party/boringssl/crypto/x509/x509cset.c',
+    'third_party/boringssl/crypto/x509/x509name.c',
+    'third_party/boringssl/crypto/x509/x509rset.c',
+    'third_party/boringssl/crypto/x509/x509spki.c',
+    'third_party/boringssl/crypto/x509/x509type.c',
+    'third_party/boringssl/crypto/x509/x_algor.c',
+    'third_party/boringssl/crypto/x509/x_all.c',
+    'third_party/boringssl/crypto/x509/x_attrib.c',
+    'third_party/boringssl/crypto/x509/x_crl.c',
+    'third_party/boringssl/crypto/x509/x_exten.c',
+    'third_party/boringssl/crypto/x509/x_info.c',
+    'third_party/boringssl/crypto/x509/x_name.c',
+    'third_party/boringssl/crypto/x509/x_pkey.c',
+    'third_party/boringssl/crypto/x509/x_pubkey.c',
+    'third_party/boringssl/crypto/x509/x_req.c',
+    'third_party/boringssl/crypto/x509/x_sig.c',
+    'third_party/boringssl/crypto/x509/x_spki.c',
+    'third_party/boringssl/crypto/x509/x_val.c',
+    'third_party/boringssl/crypto/x509/x_x509.c',
+    'third_party/boringssl/crypto/x509/x_x509a.c',
+    'third_party/boringssl/crypto/x509v3/pcy_cache.c',
+    'third_party/boringssl/crypto/x509v3/pcy_data.c',
+    'third_party/boringssl/crypto/x509v3/pcy_lib.c',
+    'third_party/boringssl/crypto/x509v3/pcy_map.c',
+    'third_party/boringssl/crypto/x509v3/pcy_node.c',
+    'third_party/boringssl/crypto/x509v3/pcy_tree.c',
+    'third_party/boringssl/crypto/x509v3/v3_akey.c',
+    'third_party/boringssl/crypto/x509v3/v3_akeya.c',
+    'third_party/boringssl/crypto/x509v3/v3_alt.c',
+    'third_party/boringssl/crypto/x509v3/v3_bcons.c',
+    'third_party/boringssl/crypto/x509v3/v3_bitst.c',
+    'third_party/boringssl/crypto/x509v3/v3_conf.c',
+    'third_party/boringssl/crypto/x509v3/v3_cpols.c',
+    'third_party/boringssl/crypto/x509v3/v3_crld.c',
+    'third_party/boringssl/crypto/x509v3/v3_enum.c',
+    'third_party/boringssl/crypto/x509v3/v3_extku.c',
+    'third_party/boringssl/crypto/x509v3/v3_genn.c',
+    'third_party/boringssl/crypto/x509v3/v3_ia5.c',
+    'third_party/boringssl/crypto/x509v3/v3_info.c',
+    'third_party/boringssl/crypto/x509v3/v3_int.c',
+    'third_party/boringssl/crypto/x509v3/v3_lib.c',
+    'third_party/boringssl/crypto/x509v3/v3_ncons.c',
+    'third_party/boringssl/crypto/x509v3/v3_pci.c',
+    'third_party/boringssl/crypto/x509v3/v3_pcia.c',
+    'third_party/boringssl/crypto/x509v3/v3_pcons.c',
+    'third_party/boringssl/crypto/x509v3/v3_pku.c',
+    'third_party/boringssl/crypto/x509v3/v3_pmaps.c',
+    'third_party/boringssl/crypto/x509v3/v3_prn.c',
+    'third_party/boringssl/crypto/x509v3/v3_purp.c',
+    'third_party/boringssl/crypto/x509v3/v3_skey.c',
+    'third_party/boringssl/crypto/x509v3/v3_sxnet.c',
+    'third_party/boringssl/crypto/x509v3/v3_utl.c',
+    'third_party/boringssl/ssl/bio_ssl.c',
+    'third_party/boringssl/ssl/custom_extensions.c',
+    'third_party/boringssl/ssl/d1_both.c',
+    'third_party/boringssl/ssl/d1_lib.c',
+    'third_party/boringssl/ssl/d1_pkt.c',
+    'third_party/boringssl/ssl/d1_srtp.c',
+    'third_party/boringssl/ssl/dtls_method.c',
+    'third_party/boringssl/ssl/dtls_record.c',
+    'third_party/boringssl/ssl/handshake_client.c',
+    'third_party/boringssl/ssl/handshake_server.c',
+    'third_party/boringssl/ssl/s3_both.c',
+    'third_party/boringssl/ssl/s3_lib.c',
+    'third_party/boringssl/ssl/s3_pkt.c',
+    'third_party/boringssl/ssl/ssl_aead_ctx.c',
+    'third_party/boringssl/ssl/ssl_asn1.c',
+    'third_party/boringssl/ssl/ssl_buffer.c',
+    'third_party/boringssl/ssl/ssl_cert.c',
+    'third_party/boringssl/ssl/ssl_cipher.c',
+    'third_party/boringssl/ssl/ssl_ecdh.c',
+    'third_party/boringssl/ssl/ssl_file.c',
+    'third_party/boringssl/ssl/ssl_lib.c',
+    'third_party/boringssl/ssl/ssl_privkey.c',
+    'third_party/boringssl/ssl/ssl_privkey_cc.cc',
+    'third_party/boringssl/ssl/ssl_session.c',
+    'third_party/boringssl/ssl/ssl_stat.c',
+    'third_party/boringssl/ssl/ssl_transcript.c',
+    'third_party/boringssl/ssl/ssl_x509.c',
+    'third_party/boringssl/ssl/t1_enc.c',
+    'third_party/boringssl/ssl/t1_lib.c',
+    'third_party/boringssl/ssl/tls13_both.c',
+    'third_party/boringssl/ssl/tls13_client.c',
+    'third_party/boringssl/ssl/tls13_enc.c',
+    'third_party/boringssl/ssl/tls13_server.c',
+    'third_party/boringssl/ssl/tls_method.c',
+    'third_party/boringssl/ssl/tls_record.c',
+    'third_party/zlib/adler32.c',
+    'third_party/zlib/compress.c',
+    'third_party/zlib/crc32.c',
+    'third_party/zlib/deflate.c',
+    'third_party/zlib/gzclose.c',
+    'third_party/zlib/gzlib.c',
+    'third_party/zlib/gzread.c',
+    'third_party/zlib/gzwrite.c',
+    'third_party/zlib/infback.c',
+    'third_party/zlib/inffast.c',
+    'third_party/zlib/inflate.c',
+    'third_party/zlib/inftrees.c',
+    'third_party/zlib/trees.c',
+    'third_party/zlib/uncompr.c',
+    'third_party/zlib/zutil.c',
+    'third_party/cares/cares/ares__close_sockets.c',
+    'third_party/cares/cares/ares__get_hostent.c',
+    'third_party/cares/cares/ares__read_line.c',
+    'third_party/cares/cares/ares__timeval.c',
+    'third_party/cares/cares/ares_cancel.c',
+    'third_party/cares/cares/ares_create_query.c',
+    'third_party/cares/cares/ares_data.c',
+    'third_party/cares/cares/ares_destroy.c',
+    'third_party/cares/cares/ares_expand_name.c',
+    'third_party/cares/cares/ares_expand_string.c',
+    'third_party/cares/cares/ares_fds.c',
+    'third_party/cares/cares/ares_free_hostent.c',
+    'third_party/cares/cares/ares_free_string.c',
+    'third_party/cares/cares/ares_getenv.c',
+    'third_party/cares/cares/ares_gethostbyaddr.c',
+    'third_party/cares/cares/ares_gethostbyname.c',
+    'third_party/cares/cares/ares_getnameinfo.c',
+    'third_party/cares/cares/ares_getopt.c',
+    'third_party/cares/cares/ares_getsock.c',
+    'third_party/cares/cares/ares_init.c',
+    'third_party/cares/cares/ares_library_init.c',
+    'third_party/cares/cares/ares_llist.c',
+    'third_party/cares/cares/ares_mkquery.c',
+    'third_party/cares/cares/ares_nowarn.c',
+    'third_party/cares/cares/ares_options.c',
+    'third_party/cares/cares/ares_parse_a_reply.c',
+    'third_party/cares/cares/ares_parse_aaaa_reply.c',
+    'third_party/cares/cares/ares_parse_mx_reply.c',
+    'third_party/cares/cares/ares_parse_naptr_reply.c',
+    'third_party/cares/cares/ares_parse_ns_reply.c',
+    'third_party/cares/cares/ares_parse_ptr_reply.c',
+    'third_party/cares/cares/ares_parse_soa_reply.c',
+    'third_party/cares/cares/ares_parse_srv_reply.c',
+    'third_party/cares/cares/ares_parse_txt_reply.c',
+    'third_party/cares/cares/ares_platform.c',
+    'third_party/cares/cares/ares_process.c',
+    'third_party/cares/cares/ares_query.c',
+    'third_party/cares/cares/ares_search.c',
+    'third_party/cares/cares/ares_send.c',
+    'third_party/cares/cares/ares_strcasecmp.c',
+    'third_party/cares/cares/ares_strdup.c',
+    'third_party/cares/cares/ares_strerror.c',
+    'third_party/cares/cares/ares_timeout.c',
+    'third_party/cares/cares/ares_version.c',
+    'third_party/cares/cares/ares_writev.c',
+    'third_party/cares/cares/bitncmp.c',
+    'third_party/cares/cares/inet_net_pton.c',
+    'third_party/cares/cares/inet_ntop.c',
+    'third_party/cares/cares/windows_port.c',
 ]
diff --git a/src/python/grpcio/grpc_version.py b/src/python/grpcio/grpc_version.py
index 8f07f3b30b..1fac57b03a 100644
--- a/src/python/grpcio/grpc_version.py
+++ b/src/python/grpcio/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio/grpc_version.py.template`!!!
 
-VERSION='1.9.0.dev0'
+VERSION = '1.9.0.dev0'
diff --git a/src/python/grpcio_health_checking/grpc_version.py b/src/python/grpcio_health_checking/grpc_version.py
index 0987d57261..5b7e5859bc 100644
--- a/src/python/grpcio_health_checking/grpc_version.py
+++ b/src/python/grpcio_health_checking/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_health_checking/grpc_version.py.template`!!!
 
-VERSION='1.9.0.dev0'
+VERSION = '1.9.0.dev0'
diff --git a/src/python/grpcio_reflection/grpc_reflection/v1alpha/reflection.py b/src/python/grpcio_reflection/grpc_reflection/v1alpha/reflection.py
index c598ea96df..26a7ba8685 100644
--- a/src/python/grpcio_reflection/grpc_reflection/v1alpha/reflection.py
+++ b/src/python/grpcio_reflection/grpc_reflection/v1alpha/reflection.py
@@ -70,7 +70,8 @@ class ReflectionServicer(reflection_pb2_grpc.ServerReflectionServicer):
 
     def _file_containing_extension(self, containing_type, extension_number):
         try:
-            message_descriptor = self._pool.FindMessageTypeByName(containing_type)
+            message_descriptor = self._pool.FindMessageTypeByName(
+                containing_type)
             extension_descriptor = self._pool.FindExtensionByNumber(
                 message_descriptor, extension_number)
             descriptor = self._pool.FindFileContainingSymbol(
@@ -82,10 +83,13 @@ class ReflectionServicer(reflection_pb2_grpc.ServerReflectionServicer):
 
     def _all_extension_numbers_of_type(self, containing_type):
         try:
-            message_descriptor = self._pool.FindMessageTypeByName(containing_type)
-            extension_numbers = tuple(sorted(
-                extension.number
-                for extension in self._pool.FindAllExtensions(message_descriptor)))
+            message_descriptor = self._pool.FindMessageTypeByName(
+                containing_type)
+            extension_numbers = tuple(
+                sorted(
+                    extension.number
+                    for extension in self._pool.FindAllExtensions(
+                        message_descriptor)))
         except KeyError:
             return _not_found_error()
         else:
diff --git a/src/python/grpcio_reflection/grpc_version.py b/src/python/grpcio_reflection/grpc_version.py
index 95d2ff143a..0ad9621154 100644
--- a/src/python/grpcio_reflection/grpc_version.py
+++ b/src/python/grpcio_reflection/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_reflection/grpc_version.py.template`!!!
 
-VERSION='1.9.0.dev0'
+VERSION = '1.9.0.dev0'
diff --git a/src/python/grpcio_testing/grpc_testing/__init__.py b/src/python/grpcio_testing/grpc_testing/__init__.py
index 994274500c..e87d0ffc96 100644
--- a/src/python/grpcio_testing/grpc_testing/__init__.py
+++ b/src/python/grpcio_testing/grpc_testing/__init__.py
@@ -495,8 +495,8 @@ class Server(six.with_metaclass(abc.ABCMeta)):
     """A server with which to test a system that services RPCs."""
 
     @abc.abstractmethod
-    def invoke_unary_unary(
-            self, method_descriptor, invocation_metadata, request, timeout):
+    def invoke_unary_unary(self, method_descriptor, invocation_metadata,
+                           request, timeout):
         """Invokes an RPC to be serviced by the system under test.
 
         Args:
@@ -513,8 +513,8 @@ class Server(six.with_metaclass(abc.ABCMeta)):
         raise NotImplementedError()
 
     @abc.abstractmethod
-    def invoke_unary_stream(
-            self, method_descriptor, invocation_metadata, request, timeout):
+    def invoke_unary_stream(self, method_descriptor, invocation_metadata,
+                            request, timeout):
         """Invokes an RPC to be serviced by the system under test.
 
         Args:
@@ -531,8 +531,8 @@ class Server(six.with_metaclass(abc.ABCMeta)):
         raise NotImplementedError()
 
     @abc.abstractmethod
-    def invoke_stream_unary(
-            self, method_descriptor, invocation_metadata, timeout):
+    def invoke_stream_unary(self, method_descriptor, invocation_metadata,
+                            timeout):
         """Invokes an RPC to be serviced by the system under test.
 
         Args:
@@ -548,8 +548,8 @@ class Server(six.with_metaclass(abc.ABCMeta)):
         raise NotImplementedError()
 
     @abc.abstractmethod
-    def invoke_stream_stream(
-            self, method_descriptor, invocation_metadata, timeout):
+    def invoke_stream_stream(self, method_descriptor, invocation_metadata,
+                             timeout):
         """Invokes an RPC to be serviced by the system under test.
 
         Args:
diff --git a/src/python/grpcio_testing/grpc_testing/_channel/__init__.py b/src/python/grpcio_testing/grpc_testing/_channel/__init__.py
index 8011975d0a..7a64cda889 100644
--- a/src/python/grpcio_testing/grpc_testing/_channel/__init__.py
+++ b/src/python/grpcio_testing/grpc_testing/_channel/__init__.py
@@ -20,4 +20,6 @@ from grpc_testing._channel import _channel_state
 # pylint: disable=unused-argument
 def testing_channel(descriptors, time):
     return _channel.TestingChannel(time, _channel_state.State())
+
+
 # pylint: enable=unused-argument
diff --git a/src/python/grpcio_testing/grpc_testing/_channel/_channel.py b/src/python/grpcio_testing/grpc_testing/_channel/_channel.py
index fbd064db88..b015b8d738 100644
--- a/src/python/grpcio_testing/grpc_testing/_channel/_channel.py
+++ b/src/python/grpcio_testing/grpc_testing/_channel/_channel.py
@@ -32,20 +32,28 @@ class TestingChannel(grpc_testing.Channel):
     def unsubscribe(self, callback):
         raise NotImplementedError()
 
-    def unary_unary(
-            self, method, request_serializer=None, response_deserializer=None):
+    def unary_unary(self,
+                    method,
+                    request_serializer=None,
+                    response_deserializer=None):
         return _multi_callable.UnaryUnary(method, self._state)
 
-    def unary_stream(
-            self, method, request_serializer=None, response_deserializer=None):
+    def unary_stream(self,
+                     method,
+                     request_serializer=None,
+                     response_deserializer=None):
         return _multi_callable.UnaryStream(method, self._state)
 
-    def stream_unary(
-            self, method, request_serializer=None, response_deserializer=None):
+    def stream_unary(self,
+                     method,
+                     request_serializer=None,
+                     response_deserializer=None):
         return _multi_callable.StreamUnary(method, self._state)
 
-    def stream_stream(
-            self, method, request_serializer=None, response_deserializer=None):
+    def stream_stream(self,
+                      method,
+                      request_serializer=None,
+                      response_deserializer=None):
         return _multi_callable.StreamStream(method, self._state)
 
     def take_unary_unary(self, method_descriptor):
@@ -59,4 +67,6 @@ class TestingChannel(grpc_testing.Channel):
 
     def take_stream_stream(self, method_descriptor):
         return _channel_rpc.stream_stream(self._state, method_descriptor)
+
+
 # pylint: enable=unused-argument
diff --git a/src/python/grpcio_testing/grpc_testing/_channel/_channel_rpc.py b/src/python/grpcio_testing/grpc_testing/_channel/_channel_rpc.py
index 762b6a035b..54499b3b55 100644
--- a/src/python/grpcio_testing/grpc_testing/_channel/_channel_rpc.py
+++ b/src/python/grpcio_testing/grpc_testing/_channel/_channel_rpc.py
@@ -27,8 +27,8 @@ class _UnaryUnary(grpc_testing.UnaryUnaryChannelRpc):
         self._rpc_state.cancelled()
 
     def terminate(self, response, trailing_metadata, code, details):
-        self._rpc_state.terminate_with_response(
-            response, trailing_metadata, code, details)
+        self._rpc_state.terminate_with_response(response, trailing_metadata,
+                                                code, details)
 
 
 class _UnaryStream(grpc_testing.UnaryStreamChannelRpc):
@@ -67,8 +67,8 @@ class _StreamUnary(grpc_testing.StreamUnaryChannelRpc):
         self._rpc_state.cancelled()
 
     def terminate(self, response, trailing_metadata, code, details):
-        self._rpc_state.terminate_with_response(
-            response, trailing_metadata, code, details)
+        self._rpc_state.terminate_with_response(response, trailing_metadata,
+                                                code, details)
 
 
 class _StreamStream(grpc_testing.StreamStreamChannelRpc):
diff --git a/src/python/grpcio_testing/grpc_testing/_channel/_channel_state.py b/src/python/grpcio_testing/grpc_testing/_channel/_channel_state.py
index 569c41d79d..779d59e59a 100644
--- a/src/python/grpcio_testing/grpc_testing/_channel/_channel_state.py
+++ b/src/python/grpcio_testing/grpc_testing/_channel/_channel_state.py
@@ -25,11 +25,10 @@ class State(_common.ChannelHandler):
         self._condition = threading.Condition()
         self._rpc_states = collections.defaultdict(list)
 
-    def invoke_rpc(
-            self, method_full_rpc_name, invocation_metadata, requests,
-            requests_closed, timeout):
-        rpc_state = _rpc_state.State(
-            invocation_metadata, requests, requests_closed)
+    def invoke_rpc(self, method_full_rpc_name, invocation_metadata, requests,
+                   requests_closed, timeout):
+        rpc_state = _rpc_state.State(invocation_metadata, requests,
+                                     requests_closed)
         with self._condition:
             self._rpc_states[method_full_rpc_name].append(rpc_state)
             self._condition.notify_all()
diff --git a/src/python/grpcio_testing/grpc_testing/_channel/_multi_callable.py b/src/python/grpcio_testing/grpc_testing/_channel/_multi_callable.py
index fe69257f5b..32b2f361d3 100644
--- a/src/python/grpcio_testing/grpc_testing/_channel/_multi_callable.py
+++ b/src/python/grpcio_testing/grpc_testing/_channel/_multi_callable.py
@@ -16,6 +16,7 @@ import grpc
 from grpc_testing import _common
 from grpc_testing._channel import _invocation
 
+
 # All per-call credentials parameters are unused by this test infrastructure.
 # pylint: disable=unused-argument
 class UnaryUnary(grpc.UnaryUnaryMultiCallable):
@@ -26,20 +27,20 @@ class UnaryUnary(grpc.UnaryUnaryMultiCallable):
 
     def __call__(self, request, timeout=None, metadata=None, credentials=None):
         rpc_handler = self._channel_handler.invoke_rpc(
-            self._method_full_rpc_name, _common.fuss_with_metadata(metadata),
-            [request], True, timeout)
+            self._method_full_rpc_name,
+            _common.fuss_with_metadata(metadata), [request], True, timeout)
         return _invocation.blocking_unary_response(rpc_handler)
 
     def with_call(self, request, timeout=None, metadata=None, credentials=None):
         rpc_handler = self._channel_handler.invoke_rpc(
-            self._method_full_rpc_name, _common.fuss_with_metadata(metadata),
-            [request], True, timeout)
+            self._method_full_rpc_name,
+            _common.fuss_with_metadata(metadata), [request], True, timeout)
         return _invocation.blocking_unary_response_with_call(rpc_handler)
 
     def future(self, request, timeout=None, metadata=None, credentials=None):
         rpc_handler = self._channel_handler.invoke_rpc(
-            self._method_full_rpc_name, _common.fuss_with_metadata(metadata),
-            [request], True, timeout)
+            self._method_full_rpc_name,
+            _common.fuss_with_metadata(metadata), [request], True, timeout)
         return _invocation.future_call(rpc_handler)
 
 
@@ -112,4 +113,6 @@ class StreamStream(grpc.StreamStreamMultiCallable):
             _common.fuss_with_metadata(metadata), [], False, timeout)
         _invocation.consume_requests(request_iterator, rpc_handler)
         return _invocation.ResponseIteratorCall(rpc_handler)
+
+
 # pylint: enable=unused-argument
diff --git a/src/python/grpcio_testing/grpc_testing/_channel/_rpc_state.py b/src/python/grpcio_testing/grpc_testing/_channel/_rpc_state.py
index e1fa49a2a8..ee0233002d 100644
--- a/src/python/grpcio_testing/grpc_testing/_channel/_rpc_state.py
+++ b/src/python/grpcio_testing/grpc_testing/_channel/_rpc_state.py
@@ -63,23 +63,22 @@ class State(_common.ChannelRpcHandler):
                 if self._code is grpc.StatusCode.OK:
                     if self._responses:
                         response = self._responses.pop(0)
-                        return _common.ChannelRpcRead(
-                            response, None, None, None)
+                        return _common.ChannelRpcRead(response, None, None,
+                                                      None)
                     else:
                         return _common.ChannelRpcRead(
-                            None, self._trailing_metadata,
-                            grpc.StatusCode.OK, self._details)
+                            None, self._trailing_metadata, grpc.StatusCode.OK,
+                            self._details)
                 elif self._code is None:
                     if self._responses:
                         response = self._responses.pop(0)
-                        return _common.ChannelRpcRead(
-                            response, None, None, None)
+                        return _common.ChannelRpcRead(response, None, None,
+                                                      None)
                     else:
                         self._condition.wait()
                 else:
-                    return _common.ChannelRpcRead(
-                        None, self._trailing_metadata, self._code,
-                        self._details)
+                    return _common.ChannelRpcRead(None, self._trailing_metadata,
+                                                  self._code, self._details)
 
     def termination(self):
         with self._condition:
@@ -150,8 +149,8 @@ class State(_common.ChannelRpcHandler):
                 self._responses.append(response)
                 self._condition.notify_all()
 
-    def terminate_with_response(
-            self, response, trailing_metadata, code, details):
+    def terminate_with_response(self, response, trailing_metadata, code,
+                                details):
         with self._condition:
             if self._initial_metadata is None:
                 self._initial_metadata = _common.FUSSED_EMPTY_METADATA
diff --git a/src/python/grpcio_testing/grpc_testing/_common.py b/src/python/grpcio_testing/grpc_testing/_common.py
index 1517434ca7..05327b0ac2 100644
--- a/src/python/grpcio_testing/grpc_testing/_common.py
+++ b/src/python/grpcio_testing/grpc_testing/_common.py
@@ -21,11 +21,9 @@ import six
 
 def _fuss(tuplified_metadata):
     return tuplified_metadata + (
-        (
-            'grpc.metadata_added_by_runtime',
-            'gRPC is allowed to add metadata in transmission and does so.',
-        ),
-    )
+        ('grpc.metadata_added_by_runtime',
+         'gRPC is allowed to add metadata in transmission and does so.',),)
+
 
 FUSSED_EMPTY_METADATA = _fuss(())
 
@@ -41,8 +39,8 @@ def rpc_names(service_descriptors):
     rpc_names_to_descriptors = {}
     for service_descriptor in service_descriptors:
         for method_descriptor in service_descriptor.methods_by_name.values():
-            rpc_name = '/{}/{}'.format(
-                service_descriptor.full_name, method_descriptor.name)
+            rpc_name = '/{}/{}'.format(service_descriptor.full_name,
+                                       method_descriptor.name)
             rpc_names_to_descriptors[rpc_name] = method_descriptor
     return rpc_names_to_descriptors
 
@@ -96,9 +94,8 @@ class ChannelRpcHandler(six.with_metaclass(abc.ABCMeta)):
 class ChannelHandler(six.with_metaclass(abc.ABCMeta)):
 
     @abc.abstractmethod
-    def invoke_rpc(
-            self, method_full_rpc_name, invocation_metadata, requests,
-            requests_closed, timeout):
+    def invoke_rpc(self, method_full_rpc_name, invocation_metadata, requests,
+                   requests_closed, timeout):
         raise NotImplementedError()
 
 
@@ -138,23 +135,21 @@ class ServerRpcHandler(six.with_metaclass(abc.ABCMeta)):
 class Serverish(six.with_metaclass(abc.ABCMeta)):
 
     @abc.abstractmethod
-    def invoke_unary_unary(
-            self, method_descriptor, handler, invocation_metadata, request,
-            deadline):
+    def invoke_unary_unary(self, method_descriptor, handler,
+                           invocation_metadata, request, deadline):
         raise NotImplementedError()
 
     @abc.abstractmethod
-    def invoke_unary_stream(
-            self, method_descriptor, handler, invocation_metadata, request,
-            deadline):
+    def invoke_unary_stream(self, method_descriptor, handler,
+                            invocation_metadata, request, deadline):
         raise NotImplementedError()
 
     @abc.abstractmethod
-    def invoke_stream_unary(
-            self, method_descriptor, handler, invocation_metadata, deadline):
+    def invoke_stream_unary(self, method_descriptor, handler,
+                            invocation_metadata, deadline):
         raise NotImplementedError()
 
     @abc.abstractmethod
-    def invoke_stream_stream(
-            self, method_descriptor, handler, invocation_metadata, deadline):
+    def invoke_stream_stream(self, method_descriptor, handler,
+                             invocation_metadata, deadline):
         raise NotImplementedError()
diff --git a/src/python/grpcio_testing/grpc_testing/_server/__init__.py b/src/python/grpcio_testing/grpc_testing/_server/__init__.py
index 759512949a..5f035a91ca 100644
--- a/src/python/grpcio_testing/grpc_testing/_server/__init__.py
+++ b/src/python/grpcio_testing/grpc_testing/_server/__init__.py
@@ -16,5 +16,5 @@ from grpc_testing._server import _server
 
 
 def server_from_dictionary(descriptors_to_servicers, time):
-    return _server.server_from_descriptor_to_servicers(
-        descriptors_to_servicers, time)
+    return _server.server_from_descriptor_to_servicers(descriptors_to_servicers,
+                                                       time)
diff --git a/src/python/grpcio_testing/grpc_testing/_server/_handler.py b/src/python/grpcio_testing/grpc_testing/_server/_handler.py
index b47e04c718..5e4730e087 100644
--- a/src/python/grpcio_testing/grpc_testing/_server/_handler.py
+++ b/src/python/grpcio_testing/grpc_testing/_server/_handler.py
@@ -170,10 +170,8 @@ class _Handler(Handler):
                     if self._unary_response is None:
                         if self._responses:
                             self._unary_response = self._responses.pop(0)
-                    return (
-                        self._unary_response, self._trailing_metadata,
-                        self._code, self._details,)
-
+                    return (self._unary_response, self._trailing_metadata,
+                            self._code, self._details,)
 
     def stream_response_termination(self):
         with self._condition:
diff --git a/src/python/grpcio_testing/grpc_testing/_server/_rpc.py b/src/python/grpcio_testing/grpc_testing/_server/_rpc.py
index f81876f4b2..2060e8daff 100644
--- a/src/python/grpcio_testing/grpc_testing/_server/_rpc.py
+++ b/src/python/grpcio_testing/grpc_testing/_server/_rpc.py
@@ -80,9 +80,8 @@ class Rpc(object):
 
     def application_cancel(self):
         with self._condition:
-            self._abort(
-                grpc.StatusCode.CANCELLED,
-                'Cancelled by server-side application!')
+            self._abort(grpc.StatusCode.CANCELLED,
+                        'Cancelled by server-side application!')
 
     def application_exception_abort(self, exception):
         with self._condition:
diff --git a/src/python/grpcio_testing/grpc_testing/_server/_server.py b/src/python/grpcio_testing/grpc_testing/_server/_server.py
index 66bcfc13c0..3e358e50a9 100644
--- a/src/python/grpcio_testing/grpc_testing/_server/_server.py
+++ b/src/python/grpcio_testing/grpc_testing/_server/_server.py
@@ -29,28 +29,34 @@ def _implementation(descriptors_to_servicers, method_descriptor):
 
 
 def _unary_unary_service(request):
+
     def service(implementation, rpc, servicer_context):
-        _service.unary_unary(
-            implementation, rpc, request, servicer_context)
+        _service.unary_unary(implementation, rpc, request, servicer_context)
+
     return service
 
 
 def _unary_stream_service(request):
+
     def service(implementation, rpc, servicer_context):
-        _service.unary_stream(
-            implementation, rpc, request, servicer_context)
+        _service.unary_stream(implementation, rpc, request, servicer_context)
+
     return service
 
 
 def _stream_unary_service(handler):
+
     def service(implementation, rpc, servicer_context):
         _service.stream_unary(implementation, rpc, handler, servicer_context)
+
     return service
 
 
 def _stream_stream_service(handler):
+
     def service(implementation, rpc, servicer_context):
         _service.stream_stream(implementation, rpc, handler, servicer_context)
+
     return service
 
 
@@ -60,11 +66,10 @@ class _Serverish(_common.Serverish):
         self._descriptors_to_servicers = descriptors_to_servicers
         self._time = time
 
-    def _invoke(
-            self, service_behavior, method_descriptor, handler,
-            invocation_metadata, deadline):
-        implementation = _implementation(
-            self._descriptors_to_servicers, method_descriptor)
+    def _invoke(self, service_behavior, method_descriptor, handler,
+                invocation_metadata, deadline):
+        implementation = _implementation(self._descriptors_to_servicers,
+                                         method_descriptor)
         rpc = _rpc.Rpc(handler, invocation_metadata)
         if handler.add_termination_callback(rpc.extrinsic_abort):
             servicer_context = _servicer_context.ServicerContext(
@@ -74,28 +79,26 @@ class _Serverish(_common.Serverish):
                 args=(implementation, rpc, servicer_context,))
             service_thread.start()
 
-    def invoke_unary_unary(
-            self, method_descriptor, handler, invocation_metadata, request,
-            deadline):
+    def invoke_unary_unary(self, method_descriptor, handler,
+                           invocation_metadata, request, deadline):
         self._invoke(
             _unary_unary_service(request), method_descriptor, handler,
             invocation_metadata, deadline)
 
-    def invoke_unary_stream(
-            self, method_descriptor, handler, invocation_metadata, request,
-            deadline):
+    def invoke_unary_stream(self, method_descriptor, handler,
+                            invocation_metadata, request, deadline):
         self._invoke(
             _unary_stream_service(request), method_descriptor, handler,
             invocation_metadata, deadline)
 
-    def invoke_stream_unary(
-            self, method_descriptor, handler, invocation_metadata, deadline):
+    def invoke_stream_unary(self, method_descriptor, handler,
+                            invocation_metadata, deadline):
         self._invoke(
             _stream_unary_service(handler), method_descriptor, handler,
             invocation_metadata, deadline)
 
-    def invoke_stream_stream(
-            self, method_descriptor, handler, invocation_metadata, deadline):
+    def invoke_stream_stream(self, method_descriptor, handler,
+                             invocation_metadata, deadline):
         self._invoke(
             _stream_stream_service(handler), method_descriptor, handler,
             invocation_metadata, deadline)
@@ -106,7 +109,8 @@ def _deadline_and_handler(requests_closed, time, timeout):
         return None, _handler.handler_without_deadline(requests_closed)
     else:
         deadline = time.time() + timeout
-        handler = _handler.handler_with_deadline(requests_closed, time, deadline)
+        handler = _handler.handler_with_deadline(requests_closed, time,
+                                                 deadline)
         return deadline, handler
 
 
@@ -116,32 +120,32 @@ class _Server(grpc_testing.Server):
         self._serverish = serverish
         self._time = time
 
-    def invoke_unary_unary(
-            self, method_descriptor, invocation_metadata, request, timeout):
+    def invoke_unary_unary(self, method_descriptor, invocation_metadata,
+                           request, timeout):
         deadline, handler = _deadline_and_handler(True, self._time, timeout)
         self._serverish.invoke_unary_unary(
             method_descriptor, handler, invocation_metadata, request, deadline)
         return _server_rpc.UnaryUnaryServerRpc(handler)
 
-    def invoke_unary_stream(
-            self, method_descriptor, invocation_metadata, request, timeout):
+    def invoke_unary_stream(self, method_descriptor, invocation_metadata,
+                            request, timeout):
         deadline, handler = _deadline_and_handler(True, self._time, timeout)
         self._serverish.invoke_unary_stream(
             method_descriptor, handler, invocation_metadata, request, deadline)
         return _server_rpc.UnaryStreamServerRpc(handler)
 
-    def invoke_stream_unary(
-            self, method_descriptor, invocation_metadata, timeout):
+    def invoke_stream_unary(self, method_descriptor, invocation_metadata,
+                            timeout):
         deadline, handler = _deadline_and_handler(False, self._time, timeout)
-        self._serverish.invoke_stream_unary(
-            method_descriptor, handler, invocation_metadata, deadline)
+        self._serverish.invoke_stream_unary(method_descriptor, handler,
+                                            invocation_metadata, deadline)
         return _server_rpc.StreamUnaryServerRpc(handler)
 
-    def invoke_stream_stream(
-            self, method_descriptor, invocation_metadata, timeout):
+    def invoke_stream_stream(self, method_descriptor, invocation_metadata,
+                             timeout):
         deadline, handler = _deadline_and_handler(False, self._time, timeout)
-        self._serverish.invoke_stream_stream(
-            method_descriptor, handler, invocation_metadata, deadline)
+        self._serverish.invoke_stream_stream(method_descriptor, handler,
+                                             invocation_metadata, deadline)
         return _server_rpc.StreamStreamServerRpc(handler)
 
 
diff --git a/src/python/grpcio_testing/grpc_testing/_server/_servicer_context.py b/src/python/grpcio_testing/grpc_testing/_server/_servicer_context.py
index 496689ded0..90eeb130d3 100644
--- a/src/python/grpcio_testing/grpc_testing/_server/_servicer_context.py
+++ b/src/python/grpcio_testing/grpc_testing/_server/_servicer_context.py
@@ -67,6 +67,9 @@ class ServicerContext(grpc.ServicerContext):
         self._rpc.set_trailing_metadata(
             _common.fuss_with_metadata(trailing_metadata))
 
+    def abort(self, code, details):
+        raise NotImplementedError()
+
     def set_code(self, code):
         self._rpc.set_code(code)
 
diff --git a/src/python/grpcio_testing/grpc_version.py b/src/python/grpcio_testing/grpc_version.py
index afc6dd83f2..0eb5fbf94d 100644
--- a/src/python/grpcio_testing/grpc_version.py
+++ b/src/python/grpcio_testing/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_testing/grpc_version.py.template`!!!
 
-VERSION='1.9.0.dev0'
+VERSION = '1.9.0.dev0'
diff --git a/src/python/grpcio_tests/grpc_version.py b/src/python/grpcio_tests/grpc_version.py
index 99ca3fd82d..b1b4d7e0c2 100644
--- a/src/python/grpcio_tests/grpc_version.py
+++ b/src/python/grpcio_tests/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_tests/grpc_version.py.template`!!!
 
-VERSION='1.9.0.dev0'
+VERSION = '1.9.0.dev0'
diff --git a/src/python/grpcio_tests/tests/tests.json b/src/python/grpcio_tests/tests/tests.json
index 34cbade92c..3bf5308749 100644
--- a/src/python/grpcio_tests/tests/tests.json
+++ b/src/python/grpcio_tests/tests/tests.json
@@ -39,6 +39,7 @@
   "unit._cython.cygrpc_test.TypeSmokeTest",
   "unit._empty_message_test.EmptyMessageTest",
   "unit._exit_test.ExitTest",
+  "unit._interceptor_test.InterceptorTest",
   "unit._invalid_metadata_test.InvalidMetadataTest",
   "unit._invocation_defects_test.InvocationDefectsTest",
   "unit._metadata_code_details_test.MetadataCodeDetailsTest",
diff --git a/src/python/grpcio_tests/tests/unit/_api_test.py b/src/python/grpcio_tests/tests/unit/_api_test.py
index b14e8d5c75..d6f4447532 100644
--- a/src/python/grpcio_tests/tests/unit/_api_test.py
+++ b/src/python/grpcio_tests/tests/unit/_api_test.py
@@ -33,18 +33,21 @@ class AllTest(unittest.TestCase):
             'AuthMetadataPlugin', 'ServerCertificateConfiguration',
             'ServerCredentials', 'UnaryUnaryMultiCallable',
             'UnaryStreamMultiCallable', 'StreamUnaryMultiCallable',
-            'StreamStreamMultiCallable', 'Channel', 'ServicerContext',
+            'StreamStreamMultiCallable', 'UnaryUnaryClientInterceptor',
+            'UnaryStreamClientInterceptor', 'StreamUnaryClientInterceptor',
+            'StreamStreamClientInterceptor', 'Channel', 'ServicerContext',
             'RpcMethodHandler', 'HandlerCallDetails', 'GenericRpcHandler',
-            'ServiceRpcHandler', 'Server', 'unary_unary_rpc_method_handler',
-            'unary_stream_rpc_method_handler',
-            'stream_unary_rpc_method_handler',
+            'ServiceRpcHandler', 'Server', 'ServerInterceptor',
+            'unary_unary_rpc_method_handler', 'unary_stream_rpc_method_handler',
+            'stream_unary_rpc_method_handler', 'ClientCallDetails',
             'stream_stream_rpc_method_handler',
             'method_handlers_generic_handler', 'ssl_channel_credentials',
             'metadata_call_credentials', 'access_token_call_credentials',
             'composite_call_credentials', 'composite_channel_credentials',
             'ssl_server_credentials', 'ssl_server_certificate_configuration',
             'dynamic_ssl_server_credentials', 'channel_ready_future',
-            'insecure_channel', 'secure_channel', 'server',)
+            'insecure_channel', 'secure_channel', 'intercept_channel',
+            'server',)
 
         six.assertCountEqual(self, expected_grpc_code_elements,
                              _from_grpc_import_star.GRPC_ELEMENTS)
diff --git a/src/python/grpcio_tests/tests/unit/_cython/_cancel_many_calls_test.py b/src/python/grpcio_tests/tests/unit/_cython/_cancel_many_calls_test.py
index 5b97b7b542..a8a7175cc7 100644
--- a/src/python/grpcio_tests/tests/unit/_cython/_cancel_many_calls_test.py
+++ b/src/python/grpcio_tests/tests/unit/_cython/_cancel_many_calls_test.py
@@ -22,7 +22,7 @@ from tests.unit.framework.common import test_constants
 
 _INFINITE_FUTURE = cygrpc.Timespec(float('+inf'))
 _EMPTY_FLAGS = 0
-_EMPTY_METADATA = cygrpc.Metadata(())
+_EMPTY_METADATA = ()
 
 _SERVER_SHUTDOWN_TAG = 'server_shutdown'
 _REQUEST_CALL_TAG = 'request_call'
@@ -65,12 +65,10 @@ class _Handler(object):
 
         with self._lock:
             self._call.start_server_batch(
-                cygrpc.Operations(
-                    (cygrpc.operation_receive_close_on_server(_EMPTY_FLAGS),)),
+                (cygrpc.operation_receive_close_on_server(_EMPTY_FLAGS),),
                 _RECEIVE_CLOSE_ON_SERVER_TAG)
             self._call.start_server_batch(
-                cygrpc.Operations(
-                    (cygrpc.operation_receive_message(_EMPTY_FLAGS),)),
+                (cygrpc.operation_receive_message(_EMPTY_FLAGS),),
                 _RECEIVE_MESSAGE_TAG)
         first_event = self._completion_queue.poll()
         if _is_cancellation_event(first_event):
@@ -84,8 +82,8 @@ class _Handler(object):
                     cygrpc.operation_send_status_from_server(
                         _EMPTY_METADATA, cygrpc.StatusCode.ok, b'test details!',
                         _EMPTY_FLAGS),)
-                self._call.start_server_batch(
-                    cygrpc.Operations(operations), _SERVER_COMPLETE_CALL_TAG)
+                self._call.start_server_batch(operations,
+                                              _SERVER_COMPLETE_CALL_TAG)
             self._completion_queue.poll()
             self._completion_queue.poll()
 
@@ -179,8 +177,7 @@ class CancelManyCallsTest(unittest.TestCase):
                     cygrpc.operation_receive_message(_EMPTY_FLAGS),
                     cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),)
                 tag = 'client_complete_call_{0:04d}_tag'.format(index)
-                client_call.start_client_batch(
-                    cygrpc.Operations(operations), tag)
+                client_call.start_client_batch(operations, tag)
                 client_due.add(tag)
                 client_calls.append(client_call)
 
diff --git a/src/python/grpcio_tests/tests/unit/_cython/_common.py b/src/python/grpcio_tests/tests/unit/_cython/_common.py
index ac66d1db3d..96f0f1589b 100644
--- a/src/python/grpcio_tests/tests/unit/_cython/_common.py
+++ b/src/python/grpcio_tests/tests/unit/_cython/_common.py
@@ -23,17 +23,14 @@ RPC_COUNT = 4000
 INFINITE_FUTURE = cygrpc.Timespec(float('+inf'))
 EMPTY_FLAGS = 0
 
-INVOCATION_METADATA = cygrpc.Metadata(
-    (cygrpc.Metadatum(b'client-md-key', b'client-md-key'),
-     cygrpc.Metadatum(b'client-md-key-bin', b'\x00\x01' * 3000),))
+INVOCATION_METADATA = (('client-md-key', 'client-md-key'),
+                       ('client-md-key-bin', b'\x00\x01' * 3000),)
 
-INITIAL_METADATA = cygrpc.Metadata(
-    (cygrpc.Metadatum(b'server-initial-md-key', b'server-initial-md-value'),
-     cygrpc.Metadatum(b'server-initial-md-key-bin', b'\x00\x02' * 3000),))
+INITIAL_METADATA = (('server-initial-md-key', 'server-initial-md-value'),
+                    ('server-initial-md-key-bin', b'\x00\x02' * 3000),)
 
-TRAILING_METADATA = cygrpc.Metadata(
-    (cygrpc.Metadatum(b'server-trailing-md-key', b'server-trailing-md-value'),
-     cygrpc.Metadatum(b'server-trailing-md-key-bin', b'\x00\x03' * 3000),))
+TRAILING_METADATA = (('server-trailing-md-key', 'server-trailing-md-value'),
+                     ('server-trailing-md-key-bin', b'\x00\x03' * 3000),)
 
 
 class QueueDriver(object):
diff --git a/src/python/grpcio_tests/tests/unit/_cython/_no_messages_server_completion_queue_per_call_test.py b/src/python/grpcio_tests/tests/unit/_cython/_no_messages_server_completion_queue_per_call_test.py
index 14cc66675c..d08003af44 100644
--- a/src/python/grpcio_tests/tests/unit/_cython/_no_messages_server_completion_queue_per_call_test.py
+++ b/src/python/grpcio_tests/tests/unit/_cython/_no_messages_server_completion_queue_per_call_test.py
@@ -48,20 +48,19 @@ class Test(_common.RpcTest, unittest.TestCase):
         client_complete_rpc_tag = 'client_complete_rpc_tag'
         with self.client_condition:
             client_receive_initial_metadata_start_batch_result = (
-                client_call.start_client_batch(
-                    cygrpc.Operations([
-                        cygrpc.operation_receive_initial_metadata(
-                            _common.EMPTY_FLAGS),
-                    ]), client_receive_initial_metadata_tag))
+                client_call.start_client_batch([
+                    cygrpc.operation_receive_initial_metadata(
+                        _common.EMPTY_FLAGS),
+                ], client_receive_initial_metadata_tag))
             client_complete_rpc_start_batch_result = client_call.start_client_batch(
-                cygrpc.Operations([
+                [
                     cygrpc.operation_send_initial_metadata(
                         _common.INVOCATION_METADATA, _common.EMPTY_FLAGS),
                     cygrpc.operation_send_close_from_client(
                         _common.EMPTY_FLAGS),
                     cygrpc.operation_receive_status_on_client(
                         _common.EMPTY_FLAGS),
-                ]), client_complete_rpc_tag)
+                ], client_complete_rpc_tag)
             self.client_driver.add_due({
                 client_receive_initial_metadata_tag,
                 client_complete_rpc_tag,
diff --git a/src/python/grpcio_tests/tests/unit/_cython/_no_messages_single_server_completion_queue_test.py b/src/python/grpcio_tests/tests/unit/_cython/_no_messages_single_server_completion_queue_test.py
index 1e44bcc4dc..d0166a2b29 100644
--- a/src/python/grpcio_tests/tests/unit/_cython/_no_messages_single_server_completion_queue_test.py
+++ b/src/python/grpcio_tests/tests/unit/_cython/_no_messages_single_server_completion_queue_test.py
@@ -43,20 +43,19 @@ class Test(_common.RpcTest, unittest.TestCase):
         client_complete_rpc_tag = 'client_complete_rpc_tag'
         with self.client_condition:
             client_receive_initial_metadata_start_batch_result = (
-                client_call.start_client_batch(
-                    cygrpc.Operations([
-                        cygrpc.operation_receive_initial_metadata(
-                            _common.EMPTY_FLAGS),
-                    ]), client_receive_initial_metadata_tag))
+                client_call.start_client_batch([
+                    cygrpc.operation_receive_initial_metadata(
+                        _common.EMPTY_FLAGS),
+                ], client_receive_initial_metadata_tag))
             client_complete_rpc_start_batch_result = client_call.start_client_batch(
-                cygrpc.Operations([
+                [
                     cygrpc.operation_send_initial_metadata(
                         _common.INVOCATION_METADATA, _common.EMPTY_FLAGS),
                     cygrpc.operation_send_close_from_client(
                         _common.EMPTY_FLAGS),
                     cygrpc.operation_receive_status_on_client(
                         _common.EMPTY_FLAGS),
-                ]), client_complete_rpc_tag)
+                ], client_complete_rpc_tag)
             self.client_driver.add_due({
                 client_receive_initial_metadata_tag,
                 client_complete_rpc_tag,
diff --git a/src/python/grpcio_tests/tests/unit/_cython/_read_some_but_not_all_responses_test.py b/src/python/grpcio_tests/tests/unit/_cython/_read_some_but_not_all_responses_test.py
index 0105612b47..1deb15ba03 100644
--- a/src/python/grpcio_tests/tests/unit/_cython/_read_some_but_not_all_responses_test.py
+++ b/src/python/grpcio_tests/tests/unit/_cython/_read_some_but_not_all_responses_test.py
@@ -20,7 +20,7 @@ from grpc._cython import cygrpc
 
 _INFINITE_FUTURE = cygrpc.Timespec(float('+inf'))
 _EMPTY_FLAGS = 0
-_EMPTY_METADATA = cygrpc.Metadata(())
+_EMPTY_METADATA = ()
 
 
 class _ServerDriver(object):
@@ -157,19 +157,17 @@ class ReadSomeButNotAllResponsesTest(unittest.TestCase):
         client_complete_rpc_tag = 'client_complete_rpc_tag'
         with client_condition:
             client_receive_initial_metadata_start_batch_result = (
-                client_call.start_client_batch(
-                    cygrpc.Operations([
-                        cygrpc.operation_receive_initial_metadata(_EMPTY_FLAGS),
-                    ]), client_receive_initial_metadata_tag))
+                client_call.start_client_batch([
+                    cygrpc.operation_receive_initial_metadata(_EMPTY_FLAGS),
+                ], client_receive_initial_metadata_tag))
             client_due.add(client_receive_initial_metadata_tag)
             client_complete_rpc_start_batch_result = (
-                client_call.start_client_batch(
-                    cygrpc.Operations([
-                        cygrpc.operation_send_initial_metadata(_EMPTY_METADATA,
-                                                               _EMPTY_FLAGS),
-                        cygrpc.operation_send_close_from_client(_EMPTY_FLAGS),
-                        cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),
-                    ]), client_complete_rpc_tag))
+                client_call.start_client_batch([
+                    cygrpc.operation_send_initial_metadata(_EMPTY_METADATA,
+                                                           _EMPTY_FLAGS),
+                    cygrpc.operation_send_close_from_client(_EMPTY_FLAGS),
+                    cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),
+                ], client_complete_rpc_tag))
             client_due.add(client_complete_rpc_tag)
 
         server_rpc_event = server_driver.first_event()
@@ -197,8 +195,8 @@ class ReadSomeButNotAllResponsesTest(unittest.TestCase):
                 server_rpc_event.operation_call.start_server_batch([
                     cygrpc.operation_receive_close_on_server(_EMPTY_FLAGS),
                     cygrpc.operation_send_status_from_server(
-                        cygrpc.Metadata(()), cygrpc.StatusCode.ok,
-                        b'test details', _EMPTY_FLAGS),
+                        (), cygrpc.StatusCode.ok, b'test details',
+                        _EMPTY_FLAGS),
                 ], server_complete_rpc_tag))
         server_send_second_message_event = server_call_driver.event_with_tag(
             server_send_second_message_tag)
@@ -209,10 +207,9 @@ class ReadSomeButNotAllResponsesTest(unittest.TestCase):
         with client_condition:
             client_receive_first_message_tag = 'client_receive_first_message_tag'
             client_receive_first_message_start_batch_result = (
-                client_call.start_client_batch(
-                    cygrpc.Operations([
-                        cygrpc.operation_receive_message(_EMPTY_FLAGS),
-                    ]), client_receive_first_message_tag))
+                client_call.start_client_batch([
+                    cygrpc.operation_receive_message(_EMPTY_FLAGS),
+                ], client_receive_first_message_tag))
             client_due.add(client_receive_first_message_tag)
         client_receive_first_message_event = client_driver.event_with_tag(
             client_receive_first_message_tag)
diff --git a/src/python/grpcio_tests/tests/unit/_cython/cygrpc_test.py b/src/python/grpcio_tests/tests/unit/_cython/cygrpc_test.py
index da94cf8028..4eda685486 100644
--- a/src/python/grpcio_tests/tests/unit/_cython/cygrpc_test.py
+++ b/src/python/grpcio_tests/tests/unit/_cython/cygrpc_test.py
@@ -29,50 +29,12 @@ _EMPTY_FLAGS = 0
 
 
 def _metadata_plugin(context, callback):
-    callback(
-        cygrpc.Metadata([
-            cygrpc.Metadatum(_CALL_CREDENTIALS_METADATA_KEY,
-                             _CALL_CREDENTIALS_METADATA_VALUE)
-        ]), cygrpc.StatusCode.ok, b'')
+    callback(((_CALL_CREDENTIALS_METADATA_KEY,
+               _CALL_CREDENTIALS_METADATA_VALUE,),), cygrpc.StatusCode.ok, b'')
 
 
 class TypeSmokeTest(unittest.TestCase):
 
-    def testStringsInUtilitiesUpDown(self):
-        self.assertEqual(0, cygrpc.StatusCode.ok)
-        metadatum = cygrpc.Metadatum(b'a', b'b')
-        self.assertEqual(b'a', metadatum.key)
-        self.assertEqual(b'b', metadatum.value)
-        metadata = cygrpc.Metadata([metadatum])
-        self.assertEqual(1, len(metadata))
-        self.assertEqual(metadatum.key, metadata[0].key)
-
-    def testMetadataIteration(self):
-        metadata = cygrpc.Metadata(
-            [cygrpc.Metadatum(b'a', b'b'), cygrpc.Metadatum(b'c', b'd')])
-        iterator = iter(metadata)
-        metadatum = next(iterator)
-        self.assertIsInstance(metadatum, cygrpc.Metadatum)
-        self.assertEqual(metadatum.key, b'a')
-        self.assertEqual(metadatum.value, b'b')
-        metadatum = next(iterator)
-        self.assertIsInstance(metadatum, cygrpc.Metadatum)
-        self.assertEqual(metadatum.key, b'c')
-        self.assertEqual(metadatum.value, b'd')
-        with self.assertRaises(StopIteration):
-            next(iterator)
-
-    def testOperationsIteration(self):
-        operations = cygrpc.Operations(
-            [cygrpc.operation_send_message(b'asdf', _EMPTY_FLAGS)])
-        iterator = iter(operations)
-        operation = next(iterator)
-        self.assertIsInstance(operation, cygrpc.Operation)
-        # `Operation`s are write-only structures; can't directly debug anything out
-        # of them. Just check that we stop iterating.
-        with self.assertRaises(StopIteration):
-            next(iterator)
-
     def testOperationFlags(self):
         operation = cygrpc.operation_send_message(b'asdf',
                                                   cygrpc.WriteFlag.no_compress)
@@ -182,8 +144,7 @@ class ServerClientMixin(object):
         def performer():
             tag = object()
             try:
-                call_result = call.start_client_batch(
-                    cygrpc.Operations(operations), tag)
+                call_result = call.start_client_batch(operations, tag)
                 self.assertEqual(cygrpc.CallError.ok, call_result)
                 event = queue.poll(deadline)
                 self.assertEqual(cygrpc.CompletionType.operation_complete,
@@ -200,14 +161,14 @@ class ServerClientMixin(object):
     def test_echo(self):
         DEADLINE = time.time() + 5
         DEADLINE_TOLERANCE = 0.25
-        CLIENT_METADATA_ASCII_KEY = b'key'
-        CLIENT_METADATA_ASCII_VALUE = b'val'
-        CLIENT_METADATA_BIN_KEY = b'key-bin'
+        CLIENT_METADATA_ASCII_KEY = 'key'
+        CLIENT_METADATA_ASCII_VALUE = 'val'
+        CLIENT_METADATA_BIN_KEY = 'key-bin'
         CLIENT_METADATA_BIN_VALUE = b'\0' * 1000
-        SERVER_INITIAL_METADATA_KEY = b'init_me_me_me'
-        SERVER_INITIAL_METADATA_VALUE = b'whodawha?'
-        SERVER_TRAILING_METADATA_KEY = b'california_is_in_a_drought'
-        SERVER_TRAILING_METADATA_VALUE = b'zomg it is'
+        SERVER_INITIAL_METADATA_KEY = 'init_me_me_me'
+        SERVER_INITIAL_METADATA_VALUE = 'whodawha?'
+        SERVER_TRAILING_METADATA_KEY = 'california_is_in_a_drought'
+        SERVER_TRAILING_METADATA_VALUE = 'zomg it is'
         SERVER_STATUS_CODE = cygrpc.StatusCode.ok
         SERVER_STATUS_DETAILS = b'our work is never over'
         REQUEST = b'in death a member of project mayhem has a name'
@@ -227,11 +188,9 @@ class ServerClientMixin(object):
         client_call = self.client_channel.create_call(
             None, 0, self.client_completion_queue, METHOD, self.host_argument,
             cygrpc_deadline)
-        client_initial_metadata = cygrpc.Metadata([
-            cygrpc.Metadatum(CLIENT_METADATA_ASCII_KEY,
-                             CLIENT_METADATA_ASCII_VALUE),
-            cygrpc.Metadatum(CLIENT_METADATA_BIN_KEY, CLIENT_METADATA_BIN_VALUE)
-        ])
+        client_initial_metadata = (
+            (CLIENT_METADATA_ASCII_KEY, CLIENT_METADATA_ASCII_VALUE,),
+            (CLIENT_METADATA_BIN_KEY, CLIENT_METADATA_BIN_VALUE,),)
         client_start_batch_result = client_call.start_client_batch([
             cygrpc.operation_send_initial_metadata(client_initial_metadata,
                                                    _EMPTY_FLAGS),
@@ -263,14 +222,10 @@ class ServerClientMixin(object):
 
         server_call_tag = object()
         server_call = request_event.operation_call
-        server_initial_metadata = cygrpc.Metadata([
-            cygrpc.Metadatum(SERVER_INITIAL_METADATA_KEY,
-                             SERVER_INITIAL_METADATA_VALUE)
-        ])
-        server_trailing_metadata = cygrpc.Metadata([
-            cygrpc.Metadatum(SERVER_TRAILING_METADATA_KEY,
-                             SERVER_TRAILING_METADATA_VALUE)
-        ])
+        server_initial_metadata = (
+            (SERVER_INITIAL_METADATA_KEY, SERVER_INITIAL_METADATA_VALUE,),)
+        server_trailing_metadata = (
+            (SERVER_TRAILING_METADATA_KEY, SERVER_TRAILING_METADATA_VALUE,),)
         server_start_batch_result = server_call.start_server_batch([
             cygrpc.operation_send_initial_metadata(
                 server_initial_metadata,
@@ -347,7 +302,7 @@ class ServerClientMixin(object):
         METHOD = b'twinkies'
 
         cygrpc_deadline = cygrpc.Timespec(DEADLINE)
-        empty_metadata = cygrpc.Metadata([])
+        empty_metadata = ()
 
         server_request_tag = object()
         self.server.request_call(self.server_completion_queue,
diff --git a/src/python/grpcio_tests/tests/unit/_interceptor_test.py b/src/python/grpcio_tests/tests/unit/_interceptor_test.py
new file mode 100644
index 0000000000..cf875ed7da
--- /dev/null
+++ b/src/python/grpcio_tests/tests/unit/_interceptor_test.py
@@ -0,0 +1,571 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Test of gRPC Python interceptors."""
+
+import collections
+import itertools
+import threading
+import unittest
+from concurrent import futures
+
+import grpc
+from grpc.framework.foundation import logging_pool
+
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.common import test_control
+
+_SERIALIZE_REQUEST = lambda bytestring: bytestring * 2
+_DESERIALIZE_REQUEST = lambda bytestring: bytestring[len(bytestring) // 2:]
+_SERIALIZE_RESPONSE = lambda bytestring: bytestring * 3
+_DESERIALIZE_RESPONSE = lambda bytestring: bytestring[:len(bytestring) // 3]
+
+_UNARY_UNARY = '/test/UnaryUnary'
+_UNARY_STREAM = '/test/UnaryStream'
+_STREAM_UNARY = '/test/StreamUnary'
+_STREAM_STREAM = '/test/StreamStream'
+
+
+class _Callback(object):
+
+    def __init__(self):
+        self._condition = threading.Condition()
+        self._value = None
+        self._called = False
+
+    def __call__(self, value):
+        with self._condition:
+            self._value = value
+            self._called = True
+            self._condition.notify_all()
+
+    def value(self):
+        with self._condition:
+            while not self._called:
+                self._condition.wait()
+            return self._value
+
+
+class _Handler(object):
+
+    def __init__(self, control):
+        self._control = control
+
+    def handle_unary_unary(self, request, servicer_context):
+        self._control.control()
+        if servicer_context is not None:
+            servicer_context.set_trailing_metadata((('testkey', 'testvalue',),))
+        return request
+
+    def handle_unary_stream(self, request, servicer_context):
+        for _ in range(test_constants.STREAM_LENGTH):
+            self._control.control()
+            yield request
+        self._control.control()
+        if servicer_context is not None:
+            servicer_context.set_trailing_metadata((('testkey', 'testvalue',),))
+
+    def handle_stream_unary(self, request_iterator, servicer_context):
+        if servicer_context is not None:
+            servicer_context.invocation_metadata()
+        self._control.control()
+        response_elements = []
+        for request in request_iterator:
+            self._control.control()
+            response_elements.append(request)
+        self._control.control()
+        if servicer_context is not None:
+            servicer_context.set_trailing_metadata((('testkey', 'testvalue',),))
+        return b''.join(response_elements)
+
+    def handle_stream_stream(self, request_iterator, servicer_context):
+        self._control.control()
+        if servicer_context is not None:
+            servicer_context.set_trailing_metadata((('testkey', 'testvalue',),))
+        for request in request_iterator:
+            self._control.control()
+            yield request
+        self._control.control()
+
+
+class _MethodHandler(grpc.RpcMethodHandler):
+
+    def __init__(self, request_streaming, response_streaming,
+                 request_deserializer, response_serializer, unary_unary,
+                 unary_stream, stream_unary, stream_stream):
+        self.request_streaming = request_streaming
+        self.response_streaming = response_streaming
+        self.request_deserializer = request_deserializer
+        self.response_serializer = response_serializer
+        self.unary_unary = unary_unary
+        self.unary_stream = unary_stream
+        self.stream_unary = stream_unary
+        self.stream_stream = stream_stream
+
+
+class _GenericHandler(grpc.GenericRpcHandler):
+
+    def __init__(self, handler):
+        self._handler = handler
+
+    def service(self, handler_call_details):
+        if handler_call_details.method == _UNARY_UNARY:
+            return _MethodHandler(False, False, None, None,
+                                  self._handler.handle_unary_unary, None, None,
+                                  None)
+        elif handler_call_details.method == _UNARY_STREAM:
+            return _MethodHandler(False, True, _DESERIALIZE_REQUEST,
+                                  _SERIALIZE_RESPONSE, None,
+                                  self._handler.handle_unary_stream, None, None)
+        elif handler_call_details.method == _STREAM_UNARY:
+            return _MethodHandler(True, False, _DESERIALIZE_REQUEST,
+                                  _SERIALIZE_RESPONSE, None, None,
+                                  self._handler.handle_stream_unary, None)
+        elif handler_call_details.method == _STREAM_STREAM:
+            return _MethodHandler(True, True, None, None, None, None, None,
+                                  self._handler.handle_stream_stream)
+        else:
+            return None
+
+
+def _unary_unary_multi_callable(channel):
+    return channel.unary_unary(_UNARY_UNARY)
+
+
+def _unary_stream_multi_callable(channel):
+    return channel.unary_stream(
+        _UNARY_STREAM,
+        request_serializer=_SERIALIZE_REQUEST,
+        response_deserializer=_DESERIALIZE_RESPONSE)
+
+
+def _stream_unary_multi_callable(channel):
+    return channel.stream_unary(
+        _STREAM_UNARY,
+        request_serializer=_SERIALIZE_REQUEST,
+        response_deserializer=_DESERIALIZE_RESPONSE)
+
+
+def _stream_stream_multi_callable(channel):
+    return channel.stream_stream(_STREAM_STREAM)
+
+
+class _ClientCallDetails(
+        collections.namedtuple('_ClientCallDetails',
+                               ('method', 'timeout', 'metadata',
+                                'credentials')), grpc.ClientCallDetails):
+    pass
+
+
+class _GenericClientInterceptor(
+        grpc.UnaryUnaryClientInterceptor, grpc.UnaryStreamClientInterceptor,
+        grpc.StreamUnaryClientInterceptor, grpc.StreamStreamClientInterceptor):
+
+    def __init__(self, interceptor_function):
+        self._fn = interceptor_function
+
+    def intercept_unary_unary(self, continuation, client_call_details, request):
+        new_details, new_request_iterator, postprocess = self._fn(
+            client_call_details, iter((request,)), False, False)
+        response = continuation(new_details, next(new_request_iterator))
+        return postprocess(response) if postprocess else response
+
+    def intercept_unary_stream(self, continuation, client_call_details,
+                               request):
+        new_details, new_request_iterator, postprocess = self._fn(
+            client_call_details, iter((request,)), False, True)
+        response_it = continuation(new_details, new_request_iterator)
+        return postprocess(response_it) if postprocess else response_it
+
+    def intercept_stream_unary(self, continuation, client_call_details,
+                               request_iterator):
+        new_details, new_request_iterator, postprocess = self._fn(
+            client_call_details, request_iterator, True, False)
+        response = continuation(new_details, next(new_request_iterator))
+        return postprocess(response) if postprocess else response
+
+    def intercept_stream_stream(self, continuation, client_call_details,
+                                request_iterator):
+        new_details, new_request_iterator, postprocess = self._fn(
+            client_call_details, request_iterator, True, True)
+        response_it = continuation(new_details, new_request_iterator)
+        return postprocess(response_it) if postprocess else response_it
+
+
+class _LoggingInterceptor(
+        grpc.ServerInterceptor, grpc.UnaryUnaryClientInterceptor,
+        grpc.UnaryStreamClientInterceptor, grpc.StreamUnaryClientInterceptor,
+        grpc.StreamStreamClientInterceptor):
+
+    def __init__(self, tag, record):
+        self.tag = tag
+        self.record = record
+
+    def intercept_service(self, continuation, handler_call_details):
+        self.record.append(self.tag + ':intercept_service')
+        return continuation(handler_call_details)
+
+    def intercept_unary_unary(self, continuation, client_call_details, request):
+        self.record.append(self.tag + ':intercept_unary_unary')
+        return continuation(client_call_details, request)
+
+    def intercept_unary_stream(self, continuation, client_call_details,
+                               request):
+        self.record.append(self.tag + ':intercept_unary_stream')
+        return continuation(client_call_details, request)
+
+    def intercept_stream_unary(self, continuation, client_call_details,
+                               request_iterator):
+        self.record.append(self.tag + ':intercept_stream_unary')
+        return continuation(client_call_details, request_iterator)
+
+    def intercept_stream_stream(self, continuation, client_call_details,
+                                request_iterator):
+        self.record.append(self.tag + ':intercept_stream_stream')
+        return continuation(client_call_details, request_iterator)
+
+
+class _DefectiveClientInterceptor(grpc.UnaryUnaryClientInterceptor):
+
+    def intercept_unary_unary(self, ignored_continuation,
+                              ignored_client_call_details, ignored_request):
+        raise test_control.Defect()
+
+
+def _wrap_request_iterator_stream_interceptor(wrapper):
+
+    def intercept_call(client_call_details, request_iterator, request_streaming,
+                       ignored_response_streaming):
+        if request_streaming:
+            return client_call_details, wrapper(request_iterator), None
+        else:
+            return client_call_details, request_iterator, None
+
+    return _GenericClientInterceptor(intercept_call)
+
+
+def _append_request_header_interceptor(header, value):
+
+    def intercept_call(client_call_details, request_iterator,
+                       ignored_request_streaming, ignored_response_streaming):
+        metadata = []
+        if client_call_details.metadata:
+            metadata = list(client_call_details.metadata)
+        metadata.append((header, value,))
+        client_call_details = _ClientCallDetails(
+            client_call_details.method, client_call_details.timeout, metadata,
+            client_call_details.credentials)
+        return client_call_details, request_iterator, None
+
+    return _GenericClientInterceptor(intercept_call)
+
+
+class _GenericServerInterceptor(grpc.ServerInterceptor):
+
+    def __init__(self, fn):
+        self._fn = fn
+
+    def intercept_service(self, continuation, handler_call_details):
+        return self._fn(continuation, handler_call_details)
+
+
+def _filter_server_interceptor(condition, interceptor):
+
+    def intercept_service(continuation, handler_call_details):
+        if condition(handler_call_details):
+            return interceptor.intercept_service(continuation,
+                                                 handler_call_details)
+        return continuation(handler_call_details)
+
+    return _GenericServerInterceptor(intercept_service)
+
+
+class InterceptorTest(unittest.TestCase):
+
+    def setUp(self):
+        self._control = test_control.PauseFailControl()
+        self._handler = _Handler(self._control)
+        self._server_pool = logging_pool.pool(test_constants.THREAD_CONCURRENCY)
+
+        self._record = []
+        conditional_interceptor = _filter_server_interceptor(
+            lambda x: ('secret', '42') in x.invocation_metadata,
+            _LoggingInterceptor('s3', self._record))
+
+        self._server = grpc.server(
+            self._server_pool,
+            interceptors=(_LoggingInterceptor('s1', self._record),
+                          conditional_interceptor,
+                          _LoggingInterceptor('s2', self._record),))
+        port = self._server.add_insecure_port('[::]:0')
+        self._server.add_generic_rpc_handlers((_GenericHandler(self._handler),))
+        self._server.start()
+
+        self._channel = grpc.insecure_channel('localhost:%d' % port)
+
+    def tearDown(self):
+        self._server.stop(None)
+        self._server_pool.shutdown(wait=True)
+
+    def testTripleRequestMessagesClientInterceptor(self):
+
+        def triple(request_iterator):
+            while True:
+                try:
+                    item = next(request_iterator)
+                    yield item
+                    yield item
+                    yield item
+                except StopIteration:
+                    break
+
+        interceptor = _wrap_request_iterator_stream_interceptor(triple)
+        channel = grpc.intercept_channel(self._channel, interceptor)
+        requests = tuple(b'\x07\x08'
+                         for _ in range(test_constants.STREAM_LENGTH))
+
+        multi_callable = _stream_stream_multi_callable(channel)
+        response_iterator = multi_callable(
+            iter(requests),
+            metadata=(
+                ('test',
+                 'InterceptedStreamRequestBlockingUnaryResponseWithCall'),))
+
+        responses = tuple(response_iterator)
+        self.assertEqual(len(responses), 3 * test_constants.STREAM_LENGTH)
+
+        multi_callable = _stream_stream_multi_callable(self._channel)
+        response_iterator = multi_callable(
+            iter(requests),
+            metadata=(
+                ('test',
+                 'InterceptedStreamRequestBlockingUnaryResponseWithCall'),))
+
+        responses = tuple(response_iterator)
+        self.assertEqual(len(responses), test_constants.STREAM_LENGTH)
+
+    def testDefectiveClientInterceptor(self):
+        interceptor = _DefectiveClientInterceptor()
+        defective_channel = grpc.intercept_channel(self._channel, interceptor)
+
+        request = b'\x07\x08'
+
+        multi_callable = _unary_unary_multi_callable(defective_channel)
+        call_future = multi_callable.future(
+            request,
+            metadata=(
+                ('test', 'InterceptedUnaryRequestBlockingUnaryResponse'),))
+
+        self.assertIsNotNone(call_future.exception())
+        self.assertEqual(call_future.code(), grpc.StatusCode.INTERNAL)
+
+    def testInterceptedHeaderManipulationWithServerSideVerification(self):
+        request = b'\x07\x08'
+
+        channel = grpc.intercept_channel(
+            self._channel, _append_request_header_interceptor('secret', '42'))
+        channel = grpc.intercept_channel(
+            channel,
+            _LoggingInterceptor('c1', self._record),
+            _LoggingInterceptor('c2', self._record))
+
+        self._record[:] = []
+
+        multi_callable = _unary_unary_multi_callable(channel)
+        multi_callable.with_call(
+            request,
+            metadata=(
+                ('test',
+                 'InterceptedUnaryRequestBlockingUnaryResponseWithCall'),))
+
+        self.assertSequenceEqual(self._record, [
+            'c1:intercept_unary_unary', 'c2:intercept_unary_unary',
+            's1:intercept_service', 's3:intercept_service',
+            's2:intercept_service'
+        ])
+
+    def testInterceptedUnaryRequestBlockingUnaryResponse(self):
+        request = b'\x07\x08'
+
+        self._record[:] = []
+
+        channel = grpc.intercept_channel(
+            self._channel,
+            _LoggingInterceptor('c1', self._record),
+            _LoggingInterceptor('c2', self._record))
+
+        multi_callable = _unary_unary_multi_callable(channel)
+        multi_callable(
+            request,
+            metadata=(
+                ('test', 'InterceptedUnaryRequestBlockingUnaryResponse'),))
+
+        self.assertSequenceEqual(self._record, [
+            'c1:intercept_unary_unary', 'c2:intercept_unary_unary',
+            's1:intercept_service', 's2:intercept_service'
+        ])
+
+    def testInterceptedUnaryRequestBlockingUnaryResponseWithCall(self):
+        request = b'\x07\x08'
+
+        channel = grpc.intercept_channel(
+            self._channel,
+            _LoggingInterceptor('c1', self._record),
+            _LoggingInterceptor('c2', self._record))
+
+        self._record[:] = []
+
+        multi_callable = _unary_unary_multi_callable(channel)
+        multi_callable.with_call(
+            request,
+            metadata=(
+                ('test',
+                 'InterceptedUnaryRequestBlockingUnaryResponseWithCall'),))
+
+        self.assertSequenceEqual(self._record, [
+            'c1:intercept_unary_unary', 'c2:intercept_unary_unary',
+            's1:intercept_service', 's2:intercept_service'
+        ])
+
+    def testInterceptedUnaryRequestFutureUnaryResponse(self):
+        request = b'\x07\x08'
+
+        self._record[:] = []
+        channel = grpc.intercept_channel(
+            self._channel,
+            _LoggingInterceptor('c1', self._record),
+            _LoggingInterceptor('c2', self._record))
+
+        multi_callable = _unary_unary_multi_callable(channel)
+        response_future = multi_callable.future(
+            request,
+            metadata=(('test', 'InterceptedUnaryRequestFutureUnaryResponse'),))
+        response_future.result()
+
+        self.assertSequenceEqual(self._record, [
+            'c1:intercept_unary_unary', 'c2:intercept_unary_unary',
+            's1:intercept_service', 's2:intercept_service'
+        ])
+
+    def testInterceptedUnaryRequestStreamResponse(self):
+        request = b'\x37\x58'
+
+        self._record[:] = []
+        channel = grpc.intercept_channel(
+            self._channel,
+            _LoggingInterceptor('c1', self._record),
+            _LoggingInterceptor('c2', self._record))
+
+        multi_callable = _unary_stream_multi_callable(channel)
+        response_iterator = multi_callable(
+            request,
+            metadata=(('test', 'InterceptedUnaryRequestStreamResponse'),))
+        tuple(response_iterator)
+
+        self.assertSequenceEqual(self._record, [
+            'c1:intercept_unary_stream', 'c2:intercept_unary_stream',
+            's1:intercept_service', 's2:intercept_service'
+        ])
+
+    def testInterceptedStreamRequestBlockingUnaryResponse(self):
+        requests = tuple(b'\x07\x08'
+                         for _ in range(test_constants.STREAM_LENGTH))
+        request_iterator = iter(requests)
+
+        self._record[:] = []
+        channel = grpc.intercept_channel(
+            self._channel,
+            _LoggingInterceptor('c1', self._record),
+            _LoggingInterceptor('c2', self._record))
+
+        multi_callable = _stream_unary_multi_callable(channel)
+        multi_callable(
+            request_iterator,
+            metadata=(
+                ('test', 'InterceptedStreamRequestBlockingUnaryResponse'),))
+
+        self.assertSequenceEqual(self._record, [
+            'c1:intercept_stream_unary', 'c2:intercept_stream_unary',
+            's1:intercept_service', 's2:intercept_service'
+        ])
+
+    def testInterceptedStreamRequestBlockingUnaryResponseWithCall(self):
+        requests = tuple(b'\x07\x08'
+                         for _ in range(test_constants.STREAM_LENGTH))
+        request_iterator = iter(requests)
+
+        self._record[:] = []
+        channel = grpc.intercept_channel(
+            self._channel,
+            _LoggingInterceptor('c1', self._record),
+            _LoggingInterceptor('c2', self._record))
+
+        multi_callable = _stream_unary_multi_callable(channel)
+        multi_callable.with_call(
+            request_iterator,
+            metadata=(
+                ('test',
+                 'InterceptedStreamRequestBlockingUnaryResponseWithCall'),))
+
+        self.assertSequenceEqual(self._record, [
+            'c1:intercept_stream_unary', 'c2:intercept_stream_unary',
+            's1:intercept_service', 's2:intercept_service'
+        ])
+
+    def testInterceptedStreamRequestFutureUnaryResponse(self):
+        requests = tuple(b'\x07\x08'
+                         for _ in range(test_constants.STREAM_LENGTH))
+        request_iterator = iter(requests)
+
+        self._record[:] = []
+        channel = grpc.intercept_channel(
+            self._channel,
+            _LoggingInterceptor('c1', self._record),
+            _LoggingInterceptor('c2', self._record))
+
+        multi_callable = _stream_unary_multi_callable(channel)
+        response_future = multi_callable.future(
+            request_iterator,
+            metadata=(('test', 'InterceptedStreamRequestFutureUnaryResponse'),))
+        response_future.result()
+
+        self.assertSequenceEqual(self._record, [
+            'c1:intercept_stream_unary', 'c2:intercept_stream_unary',
+            's1:intercept_service', 's2:intercept_service'
+        ])
+
+    def testInterceptedStreamRequestStreamResponse(self):
+        requests = tuple(b'\x77\x58'
+                         for _ in range(test_constants.STREAM_LENGTH))
+        request_iterator = iter(requests)
+
+        self._record[:] = []
+        channel = grpc.intercept_channel(
+            self._channel,
+            _LoggingInterceptor('c1', self._record),
+            _LoggingInterceptor('c2', self._record))
+
+        multi_callable = _stream_stream_multi_callable(channel)
+        response_iterator = multi_callable(
+            request_iterator,
+            metadata=(('test', 'InterceptedStreamRequestStreamResponse'),))
+        tuple(response_iterator)
+
+        self.assertSequenceEqual(self._record, [
+            'c1:intercept_stream_stream', 'c2:intercept_stream_stream',
+            's1:intercept_service', 's2:intercept_service'
+        ])
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)
diff --git a/src/python/grpcio_tests/tests/unit/_metadata_code_details_test.py b/src/python/grpcio_tests/tests/unit/_metadata_code_details_test.py
index 6faab94be6..cb59cd3769 100644
--- a/src/python/grpcio_tests/tests/unit/_metadata_code_details_test.py
+++ b/src/python/grpcio_tests/tests/unit/_metadata_code_details_test.py
@@ -56,6 +56,7 @@ class _Servicer(object):
 
     def __init__(self):
         self._lock = threading.Lock()
+        self._abort_call = False
         self._code = None
         self._details = None
         self._exception = False
@@ -67,10 +68,13 @@ class _Servicer(object):
             self._received_client_metadata = context.invocation_metadata()
             context.send_initial_metadata(_SERVER_INITIAL_METADATA)
             context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
-            if self._code is not None:
-                context.set_code(self._code)
-            if self._details is not None:
-                context.set_details(self._details)
+            if self._abort_call:
+                context.abort(self._code, self._details)
+            else:
+                if self._code is not None:
+                    context.set_code(self._code)
+                if self._details is not None:
+                    context.set_details(self._details)
             if self._exception:
                 raise test_control.Defect()
             else:
@@ -81,10 +85,13 @@ class _Servicer(object):
             self._received_client_metadata = context.invocation_metadata()
             context.send_initial_metadata(_SERVER_INITIAL_METADATA)
             context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
-            if self._code is not None:
-                context.set_code(self._code)
-            if self._details is not None:
-                context.set_details(self._details)
+            if self._abort_call:
+                context.abort(self._code, self._details)
+            else:
+                if self._code is not None:
+                    context.set_code(self._code)
+                if self._details is not None:
+                    context.set_details(self._details)
             for _ in range(test_constants.STREAM_LENGTH // 2):
                 yield _SERIALIZED_RESPONSE
             if self._exception:
@@ -95,14 +102,16 @@ class _Servicer(object):
             self._received_client_metadata = context.invocation_metadata()
             context.send_initial_metadata(_SERVER_INITIAL_METADATA)
             context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
-            if self._code is not None:
-                context.set_code(self._code)
-            if self._details is not None:
-                context.set_details(self._details)
             # TODO(https://github.com/grpc/grpc/issues/6891): just ignore the
             # request iterator.
-            for ignored_request in request_iterator:
-                pass
+            list(request_iterator)
+            if self._abort_call:
+                context.abort(self._code, self._details)
+            else:
+                if self._code is not None:
+                    context.set_code(self._code)
+                if self._details is not None:
+                    context.set_details(self._details)
             if self._exception:
                 raise test_control.Defect()
             else:
@@ -113,19 +122,25 @@ class _Servicer(object):
             self._received_client_metadata = context.invocation_metadata()
             context.send_initial_metadata(_SERVER_INITIAL_METADATA)
             context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
-            if self._code is not None:
-                context.set_code(self._code)
-            if self._details is not None:
-                context.set_details(self._details)
             # TODO(https://github.com/grpc/grpc/issues/6891): just ignore the
             # request iterator.
-            for ignored_request in request_iterator:
-                pass
+            list(request_iterator)
+            if self._abort_call:
+                context.abort(self._code, self._details)
+            else:
+                if self._code is not None:
+                    context.set_code(self._code)
+                if self._details is not None:
+                    context.set_details(self._details)
             for _ in range(test_constants.STREAM_LENGTH // 3):
                 yield object()
             if self._exception:
                 raise test_control.Defect()
 
+    def set_abort_call(self):
+        with self._lock:
+            self._abort_call = True
+
     def set_code(self, code):
         with self._lock:
             self._code = code
@@ -212,11 +227,10 @@ class MetadataCodeDetailsTest(unittest.TestCase):
     def testSuccessfulUnaryStream(self):
         self._servicer.set_details(_DETAILS)
 
-        call = self._unary_stream(
+        response_iterator_call = self._unary_stream(
             _SERIALIZED_REQUEST, metadata=_CLIENT_METADATA)
-        received_initial_metadata = call.initial_metadata()
-        for _ in call:
-            pass
+        received_initial_metadata = response_iterator_call.initial_metadata()
+        list(response_iterator_call)
 
         self.assertTrue(
             test_common.metadata_transmitted(
@@ -225,10 +239,11 @@ class MetadataCodeDetailsTest(unittest.TestCase):
             test_common.metadata_transmitted(_SERVER_INITIAL_METADATA,
                                              received_initial_metadata))
         self.assertTrue(
-            test_common.metadata_transmitted(_SERVER_TRAILING_METADATA,
-                                             call.trailing_metadata()))
-        self.assertIs(grpc.StatusCode.OK, call.code())
-        self.assertEqual(_DETAILS, call.details())
+            test_common.metadata_transmitted(
+                _SERVER_TRAILING_METADATA,
+                response_iterator_call.trailing_metadata()))
+        self.assertIs(grpc.StatusCode.OK, response_iterator_call.code())
+        self.assertEqual(_DETAILS, response_iterator_call.details())
 
     def testSuccessfulStreamUnary(self):
         self._servicer.set_details(_DETAILS)
@@ -252,12 +267,11 @@ class MetadataCodeDetailsTest(unittest.TestCase):
     def testSuccessfulStreamStream(self):
         self._servicer.set_details(_DETAILS)
 
-        call = self._stream_stream(
+        response_iterator_call = self._stream_stream(
             iter([object()] * test_constants.STREAM_LENGTH),
             metadata=_CLIENT_METADATA)
-        received_initial_metadata = call.initial_metadata()
-        for _ in call:
-            pass
+        received_initial_metadata = response_iterator_call.initial_metadata()
+        list(response_iterator_call)
 
         self.assertTrue(
             test_common.metadata_transmitted(
@@ -266,10 +280,106 @@ class MetadataCodeDetailsTest(unittest.TestCase):
             test_common.metadata_transmitted(_SERVER_INITIAL_METADATA,
                                              received_initial_metadata))
         self.assertTrue(
-            test_common.metadata_transmitted(_SERVER_TRAILING_METADATA,
-                                             call.trailing_metadata()))
-        self.assertIs(grpc.StatusCode.OK, call.code())
-        self.assertEqual(_DETAILS, call.details())
+            test_common.metadata_transmitted(
+                _SERVER_TRAILING_METADATA,
+                response_iterator_call.trailing_metadata()))
+        self.assertIs(grpc.StatusCode.OK, response_iterator_call.code())
+        self.assertEqual(_DETAILS, response_iterator_call.details())
+
+    def testAbortedUnaryUnary(self):
+        self._servicer.set_code(_NON_OK_CODE)
+        self._servicer.set_details(_DETAILS)
+        self._servicer.set_abort_call()
+
+        with self.assertRaises(grpc.RpcError) as exception_context:
+            self._unary_unary.with_call(object(), metadata=_CLIENT_METADATA)
+
+        self.assertTrue(
+            test_common.metadata_transmitted(
+                _CLIENT_METADATA, self._servicer.received_client_metadata()))
+        self.assertTrue(
+            test_common.metadata_transmitted(
+                _SERVER_INITIAL_METADATA,
+                exception_context.exception.initial_metadata()))
+        self.assertTrue(
+            test_common.metadata_transmitted(
+                _SERVER_TRAILING_METADATA,
+                exception_context.exception.trailing_metadata()))
+        self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+        self.assertEqual(_DETAILS, exception_context.exception.details())
+
+    def testAbortedUnaryStream(self):
+        self._servicer.set_code(_NON_OK_CODE)
+        self._servicer.set_details(_DETAILS)
+        self._servicer.set_abort_call()
+
+        response_iterator_call = self._unary_stream(
+            _SERIALIZED_REQUEST, metadata=_CLIENT_METADATA)
+        received_initial_metadata = response_iterator_call.initial_metadata()
+        with self.assertRaises(grpc.RpcError):
+            self.assertEqual(len(list(response_iterator_call)), 0)
+
+        self.assertTrue(
+            test_common.metadata_transmitted(
+                _CLIENT_METADATA, self._servicer.received_client_metadata()))
+        self.assertTrue(
+            test_common.metadata_transmitted(_SERVER_INITIAL_METADATA,
+                                             received_initial_metadata))
+        self.assertTrue(
+            test_common.metadata_transmitted(
+                _SERVER_TRAILING_METADATA,
+                response_iterator_call.trailing_metadata()))
+        self.assertIs(_NON_OK_CODE, response_iterator_call.code())
+        self.assertEqual(_DETAILS, response_iterator_call.details())
+
+    def testAbortedStreamUnary(self):
+        self._servicer.set_code(_NON_OK_CODE)
+        self._servicer.set_details(_DETAILS)
+        self._servicer.set_abort_call()
+
+        with self.assertRaises(grpc.RpcError) as exception_context:
+            self._stream_unary.with_call(
+                iter([_SERIALIZED_REQUEST] * test_constants.STREAM_LENGTH),
+                metadata=_CLIENT_METADATA)
+
+        self.assertTrue(
+            test_common.metadata_transmitted(
+                _CLIENT_METADATA, self._servicer.received_client_metadata()))
+        self.assertTrue(
+            test_common.metadata_transmitted(
+                _SERVER_INITIAL_METADATA,
+                exception_context.exception.initial_metadata()))
+        self.assertTrue(
+            test_common.metadata_transmitted(
+                _SERVER_TRAILING_METADATA,
+                exception_context.exception.trailing_metadata()))
+        self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+        self.assertEqual(_DETAILS, exception_context.exception.details())
+
+    def testAbortedStreamStream(self):
+        self._servicer.set_code(_NON_OK_CODE)
+        self._servicer.set_details(_DETAILS)
+        self._servicer.set_abort_call()
+
+        response_iterator_call = self._stream_stream(
+            iter([object()] * test_constants.STREAM_LENGTH),
+            metadata=_CLIENT_METADATA)
+        received_initial_metadata = response_iterator_call.initial_metadata()
+        with self.assertRaises(grpc.RpcError):
+            self.assertEqual(len(list(response_iterator_call)), 0)
+
+        self.assertTrue(
+            test_common.metadata_transmitted(
+                _CLIENT_METADATA, self._servicer.received_client_metadata()))
+        self.assertTrue(
+            test_common.metadata_transmitted(_SERVER_INITIAL_METADATA,
+                                             received_initial_metadata))
+        self.assertTrue(
+            test_common.metadata_transmitted(
+                _SERVER_TRAILING_METADATA,
+                response_iterator_call.trailing_metadata()))
+        self.assertIs(_NON_OK_CODE, response_iterator_call.code())
+        self.assertEqual(_DETAILS, response_iterator_call.details())
 
     def testCustomCodeUnaryUnary(self):
         self._servicer.set_code(_NON_OK_CODE)
@@ -296,12 +406,11 @@ class MetadataCodeDetailsTest(unittest.TestCase):
         self._servicer.set_code(_NON_OK_CODE)
         self._servicer.set_details(_DETAILS)
 
-        call = self._unary_stream(
+        response_iterator_call = self._unary_stream(
             _SERIALIZED_REQUEST, metadata=_CLIENT_METADATA)
-        received_initial_metadata = call.initial_metadata()
+        received_initial_metadata = response_iterator_call.initial_metadata()
         with self.assertRaises(grpc.RpcError):
-            for _ in call:
-                pass
+            list(response_iterator_call)
 
         self.assertTrue(
             test_common.metadata_transmitted(
@@ -310,10 +419,11 @@ class MetadataCodeDetailsTest(unittest.TestCase):
             test_common.metadata_transmitted(_SERVER_INITIAL_METADATA,
                                              received_initial_metadata))
         self.assertTrue(
-            test_common.metadata_transmitted(_SERVER_TRAILING_METADATA,
-                                             call.trailing_metadata()))
-        self.assertIs(_NON_OK_CODE, call.code())
-        self.assertEqual(_DETAILS, call.details())
+            test_common.metadata_transmitted(
+                _SERVER_TRAILING_METADATA,
+                response_iterator_call.trailing_metadata()))
+        self.assertIs(_NON_OK_CODE, response_iterator_call.code())
+        self.assertEqual(_DETAILS, response_iterator_call.details())
 
     def testCustomCodeStreamUnary(self):
         self._servicer.set_code(_NON_OK_CODE)
@@ -342,13 +452,12 @@ class MetadataCodeDetailsTest(unittest.TestCase):
         self._servicer.set_code(_NON_OK_CODE)
         self._servicer.set_details(_DETAILS)
 
-        call = self._stream_stream(
+        response_iterator_call = self._stream_stream(
             iter([object()] * test_constants.STREAM_LENGTH),
             metadata=_CLIENT_METADATA)
-        received_initial_metadata = call.initial_metadata()
+        received_initial_metadata = response_iterator_call.initial_metadata()
         with self.assertRaises(grpc.RpcError) as exception_context:
-            for _ in call:
-                pass
+            list(response_iterator_call)
 
         self.assertTrue(
             test_common.metadata_transmitted(
@@ -390,12 +499,11 @@ class MetadataCodeDetailsTest(unittest.TestCase):
         self._servicer.set_details(_DETAILS)
         self._servicer.set_exception()
 
-        call = self._unary_stream(
+        response_iterator_call = self._unary_stream(
             _SERIALIZED_REQUEST, metadata=_CLIENT_METADATA)
-        received_initial_metadata = call.initial_metadata()
+        received_initial_metadata = response_iterator_call.initial_metadata()
         with self.assertRaises(grpc.RpcError):
-            for _ in call:
-                pass
+            list(response_iterator_call)
 
         self.assertTrue(
             test_common.metadata_transmitted(
@@ -404,10 +512,11 @@ class MetadataCodeDetailsTest(unittest.TestCase):
             test_common.metadata_transmitted(_SERVER_INITIAL_METADATA,
                                              received_initial_metadata))
         self.assertTrue(
-            test_common.metadata_transmitted(_SERVER_TRAILING_METADATA,
-                                             call.trailing_metadata()))
-        self.assertIs(_NON_OK_CODE, call.code())
-        self.assertEqual(_DETAILS, call.details())
+            test_common.metadata_transmitted(
+                _SERVER_TRAILING_METADATA,
+                response_iterator_call.trailing_metadata()))
+        self.assertIs(_NON_OK_CODE, response_iterator_call.code())
+        self.assertEqual(_DETAILS, response_iterator_call.details())
 
     def testCustomCodeExceptionStreamUnary(self):
         self._servicer.set_code(_NON_OK_CODE)
@@ -438,13 +547,12 @@ class MetadataCodeDetailsTest(unittest.TestCase):
         self._servicer.set_details(_DETAILS)
         self._servicer.set_exception()
 
-        call = self._stream_stream(
+        response_iterator_call = self._stream_stream(
             iter([object()] * test_constants.STREAM_LENGTH),
             metadata=_CLIENT_METADATA)
-        received_initial_metadata = call.initial_metadata()
+        received_initial_metadata = response_iterator_call.initial_metadata()
         with self.assertRaises(grpc.RpcError):
-            for _ in call:
-                pass
+            list(response_iterator_call)
 
         self.assertTrue(
             test_common.metadata_transmitted(
@@ -453,10 +561,11 @@ class MetadataCodeDetailsTest(unittest.TestCase):
             test_common.metadata_transmitted(_SERVER_INITIAL_METADATA,
                                              received_initial_metadata))
         self.assertTrue(
-            test_common.metadata_transmitted(_SERVER_TRAILING_METADATA,
-                                             call.trailing_metadata()))
-        self.assertIs(_NON_OK_CODE, call.code())
-        self.assertEqual(_DETAILS, call.details())
+            test_common.metadata_transmitted(
+                _SERVER_TRAILING_METADATA,
+                response_iterator_call.trailing_metadata()))
+        self.assertIs(_NON_OK_CODE, response_iterator_call.code())
+        self.assertEqual(_DETAILS, response_iterator_call.details())
 
     def testCustomCodeReturnNoneUnaryUnary(self):
         self._servicer.set_code(_NON_OK_CODE)
diff --git a/src/ruby/end2end/multiple_killed_watching_threads_driver.rb b/src/ruby/end2end/multiple_killed_watching_threads_driver.rb
index 59f6f275e4..8f078cfbed 100755
--- a/src/ruby/end2end/multiple_killed_watching_threads_driver.rb
+++ b/src/ruby/end2end/multiple_killed_watching_threads_driver.rb
@@ -20,7 +20,7 @@ Thread.abort_on_exception = true
 
 include GRPC::Core::ConnectivityStates
 
-def watch_state(ch)
+def watch_state(ch, sleep_time)
   thd = Thread.new do
     state = ch.connectivity_state(false)
     fail "non-idle state: #{state}" unless state == IDLE
@@ -28,23 +28,34 @@ def watch_state(ch)
   end
   # sleep to get the thread into the middle of a
   # "watch connectivity state" call
-  sleep 0.1
+  sleep sleep_time
   thd.kill
 end
 
-def main
+def run_multiple_killed_watches(num_threads, sleep_time)
   channels = []
-  10.times do
+  num_threads.times do
     ch = GRPC::Core::Channel.new('dummy_host',
                                  nil, :this_channel_is_insecure)
-    watch_state(ch)
+    watch_state(ch, sleep_time)
     channels << ch
   end
 
   # checking state should still be safe to call
   channels.each do |c|
-    fail unless c.connectivity_state(false) == FATAL_FAILURE
+    connectivity_state = c.connectivity_state(false)
+    # The state should be FATAL_FAILURE in the case that it was interrupted
+    # while watching connectivity state, and IDLE if it we never started
+    # watching the channel's connectivity state
+    unless [FATAL_FAILURE, IDLE].include?(connectivity_state)
+      fail "unexpected connectivity state: #{connectivity_state}"
+    end
   end
 end
 
+def main
+  run_multiple_killed_watches(10, 0.1)
+  run_multiple_killed_watches(1000, 0.001)
+end
+
 main
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index 9d2cf2a08a..c1a0c56841 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -61,7 +61,7 @@ ENV['EMBED_ZLIB'] = 'true'
 ENV['EMBED_CARES'] = 'true'
 ENV['ARCH_FLAGS'] = RbConfig::CONFIG['ARCH_FLAG']
 ENV['ARCH_FLAGS'] = '-arch i386 -arch x86_64' if RUBY_PLATFORM =~ /darwin/
-ENV['CFLAGS'] = '-DGPR_BACKWARDS_COMPATIBILITY_MODE'
+ENV['CPPFLAGS'] = '-DGPR_BACKWARDS_COMPATIBILITY_MODE'
 
 output_dir = File.expand_path(RbConfig::CONFIG['topdir'])
 grpc_lib_dir = File.join(output_dir, 'libs', grpc_config)
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index 62223fda5b..6377008a3b 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -558,7 +558,7 @@ extern grpc_slice_buffer_move_first_type grpc_slice_buffer_move_first_import;
 typedef void(*grpc_slice_buffer_move_first_no_ref_type)(grpc_slice_buffer* src, size_t n, grpc_slice_buffer* dst);
 extern grpc_slice_buffer_move_first_no_ref_type grpc_slice_buffer_move_first_no_ref_import;
 #define grpc_slice_buffer_move_first_no_ref grpc_slice_buffer_move_first_no_ref_import
-typedef void(*grpc_slice_buffer_move_first_into_buffer_type)(grpc_exec_ctx* exec_ctx, grpc_slice_buffer* src, size_t n, void* dst);
+typedef void(*grpc_slice_buffer_move_first_into_buffer_type)(grpc_slice_buffer* src, size_t n, void* dst);
 extern grpc_slice_buffer_move_first_into_buffer_type grpc_slice_buffer_move_first_into_buffer_import;
 #define grpc_slice_buffer_move_first_into_buffer grpc_slice_buffer_move_first_into_buffer_import
 typedef grpc_slice(*grpc_slice_buffer_take_first_type)(grpc_slice_buffer* src);
@@ -768,7 +768,7 @@ extern gpr_stats_inc_type gpr_stats_inc_import;
 typedef intptr_t(*gpr_stats_read_type)(const gpr_stats_counter* c);
 extern gpr_stats_read_type gpr_stats_read_import;
 #define gpr_stats_read gpr_stats_read_import
-typedef int(*gpr_thd_new_type)(gpr_thd_id* t, void (*thd_body)(void* arg), void* arg, const gpr_thd_options* options);
+typedef int(*gpr_thd_new_type)(gpr_thd_id* t, const char* thd_name, void (*thd_body)(void* arg), void* arg, const gpr_thd_options* options);
 extern gpr_thd_new_type gpr_thd_new_import;
 #define gpr_thd_new gpr_thd_new_import
 typedef gpr_thd_options(*gpr_thd_options_default_type)(void);
diff --git a/templates/gRPC-Core.podspec.template b/templates/gRPC-Core.podspec.template
index 04b8940d6b..cb4d556acf 100644
--- a/templates/gRPC-Core.podspec.template
+++ b/templates/gRPC-Core.podspec.template
@@ -61,6 +61,10 @@
       :tag => "v#{version}",
     }
 
+    # gRPC podspecs depend on fix for https://github.com/CocoaPods/CocoaPods/issues/6024,
+    # which was released in Cocoapods v1.2.0.
+    s.cocoapods_version = '>= 1.2.0'
+
     s.ios.deployment_target = '7.0'
     s.osx.deployment_target = '10.9'
     s.requires_arc = false
diff --git a/templates/src/python/grpcio/grpc_core_dependencies.py.template b/templates/src/python/grpcio/grpc_core_dependencies.py.template
index 02e066cf8f..6295ed3081 100644
--- a/templates/src/python/grpcio/grpc_core_dependencies.py.template
+++ b/templates/src/python/grpcio/grpc_core_dependencies.py.template
@@ -20,7 +20,7 @@
   % for lib in libs:
   % if lib.name in python_dependencies.transitive_deps:
   % for src in lib.src:
-    '${src}',
+      '${src}',
   % endfor
   % endif
   % endfor
diff --git a/templates/src/python/grpcio/grpc_version.py.template b/templates/src/python/grpcio/grpc_version.py.template
index 38ae54d619..5e5d22126e 100644
--- a/templates/src/python/grpcio/grpc_version.py.template
+++ b/templates/src/python/grpcio/grpc_version.py.template
@@ -16,4 +16,4 @@
 
   # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio/grpc_version.py.template`!!!
 
-  VERSION='${settings.python_version.pep440()}'
+  VERSION = '${settings.python_version.pep440()}'
diff --git a/templates/src/python/grpcio_health_checking/grpc_version.py.template b/templates/src/python/grpcio_health_checking/grpc_version.py.template
index 558b2d152b..ffb81acc89 100644
--- a/templates/src/python/grpcio_health_checking/grpc_version.py.template
+++ b/templates/src/python/grpcio_health_checking/grpc_version.py.template
@@ -16,4 +16,4 @@
 
   # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_health_checking/grpc_version.py.template`!!!
 
-  VERSION='${settings.python_version.pep440()}'
+  VERSION = '${settings.python_version.pep440()}'
diff --git a/templates/src/python/grpcio_reflection/grpc_version.py.template b/templates/src/python/grpcio_reflection/grpc_version.py.template
index 8fb42a4859..cc99533a43 100644
--- a/templates/src/python/grpcio_reflection/grpc_version.py.template
+++ b/templates/src/python/grpcio_reflection/grpc_version.py.template
@@ -16,4 +16,4 @@
 
   # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_reflection/grpc_version.py.template`!!!
 
-  VERSION='${settings.python_version.pep440()}'
+  VERSION = '${settings.python_version.pep440()}'
diff --git a/templates/src/python/grpcio_testing/grpc_version.py.template b/templates/src/python/grpcio_testing/grpc_version.py.template
index 74db811d60..a49392e5b1 100644
--- a/templates/src/python/grpcio_testing/grpc_version.py.template
+++ b/templates/src/python/grpcio_testing/grpc_version.py.template
@@ -16,4 +16,4 @@
 
   # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_testing/grpc_version.py.template`!!!
 
-  VERSION='${settings.python_version.pep440()}'
+  VERSION = '${settings.python_version.pep440()}'
diff --git a/templates/src/python/grpcio_tests/grpc_version.py.template b/templates/src/python/grpcio_tests/grpc_version.py.template
index 16fc92e536..851fb7bce1 100644
--- a/templates/src/python/grpcio_tests/grpc_version.py.template
+++ b/templates/src/python/grpcio_tests/grpc_version.py.template
@@ -16,4 +16,4 @@
 
   # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_tests/grpc_version.py.template`!!!
 
-  VERSION='${settings.python_version.pep440()}'
+  VERSION = '${settings.python_version.pep440()}'
diff --git a/templates/tools/distrib/python/grpcio_tools/grpc_version.py.template b/templates/tools/distrib/python/grpcio_tools/grpc_version.py.template
index aacb3ecc8f..e25791dd0e 100644
--- a/templates/tools/distrib/python/grpcio_tools/grpc_version.py.template
+++ b/templates/tools/distrib/python/grpcio_tools/grpc_version.py.template
@@ -16,4 +16,4 @@
 
   # AUTO-GENERATED FROM `$REPO_ROOT/templates/tools/distrib/python/grpcio_tools/grpc_version.py.template`!!!
 
-  VERSION='${settings.python_version.pep440()}'
+  VERSION = '${settings.python_version.pep440()}'
diff --git a/test/core/backoff/backoff_test.cc b/test/core/backoff/backoff_test.cc
index 07e61bc11e..7bc4d14ce6 100644
--- a/test/core/backoff/backoff_test.cc
+++ b/test/core/backoff/backoff_test.cc
@@ -37,6 +37,7 @@ TEST(BackOffTest, ConstantBackOff) {
   const double multiplier = 1.0;
   const double jitter = 0.0;
   const grpc_millis max_backoff = 1000;
+  grpc_core::ExecCtx exec_ctx;
   BackOff::Options options;
   options.set_initial_backoff(initial_backoff)
       .set_multiplier(multiplier)
@@ -44,16 +45,14 @@ TEST(BackOffTest, ConstantBackOff) {
       .set_max_backoff(max_backoff);
   BackOff backoff(options);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_millis next_attempt_start_time = backoff.Begin(&exec_ctx);
-  EXPECT_EQ(next_attempt_start_time - grpc_exec_ctx_now(&exec_ctx),
+  grpc_millis next_attempt_start_time = backoff.Begin();
+  EXPECT_EQ(next_attempt_start_time - grpc_core::ExecCtx::Get()->Now(),
             initial_backoff);
   for (int i = 0; i < 10000; i++) {
-    next_attempt_start_time = backoff.Step(&exec_ctx);
-    EXPECT_EQ(next_attempt_start_time - grpc_exec_ctx_now(&exec_ctx),
+    next_attempt_start_time = backoff.Step();
+    EXPECT_EQ(next_attempt_start_time - grpc_core::ExecCtx::Get()->Now(),
               initial_backoff);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 TEST(BackOffTest, MinConnect) {
@@ -61,16 +60,15 @@ TEST(BackOffTest, MinConnect) {
   const double multiplier = 1.0;
   const double jitter = 0.0;
   const grpc_millis max_backoff = 1000;
+  grpc_core::ExecCtx exec_ctx;
   BackOff::Options options;
   options.set_initial_backoff(initial_backoff)
       .set_multiplier(multiplier)
       .set_jitter(jitter)
       .set_max_backoff(max_backoff);
   BackOff backoff(options);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_millis next = backoff.Begin(&exec_ctx);
-  EXPECT_EQ(next - grpc_exec_ctx_now(&exec_ctx), initial_backoff);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_millis next = backoff.Begin();
+  EXPECT_EQ(next - grpc_core::ExecCtx::Get()->Now(), initial_backoff);
 }
 
 TEST(BackOffTest, NoJitterBackOff) {
@@ -86,47 +84,45 @@ TEST(BackOffTest, NoJitterBackOff) {
   BackOff backoff(options);
   // x_1 = 2
   // x_n = 2**i + x_{i-1} ( = 2**(n+1) - 2 )
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  exec_ctx.now = 0;
-  exec_ctx.now_is_valid = true;
-  grpc_millis next = backoff.Begin(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(0);
+  grpc_millis next = backoff.Begin();
   EXPECT_EQ(next, 2);
-  exec_ctx.now = next;
-  next = backoff.Step(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next);
+  next = backoff.Step();
   EXPECT_EQ(next, 6);
-  exec_ctx.now = next;
-  next = backoff.Step(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next);
+  next = backoff.Step();
   EXPECT_EQ(next, 14);
-  exec_ctx.now = next;
-  next = backoff.Step(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next);
+  next = backoff.Step();
   EXPECT_EQ(next, 30);
-  exec_ctx.now = next;
-  next = backoff.Step(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next);
+  next = backoff.Step();
   EXPECT_EQ(next, 62);
-  exec_ctx.now = next;
-  next = backoff.Step(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next);
+  next = backoff.Step();
   EXPECT_EQ(next, 126);
-  exec_ctx.now = next;
-  next = backoff.Step(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next);
+  next = backoff.Step();
   EXPECT_EQ(next, 254);
-  exec_ctx.now = next;
-  next = backoff.Step(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next);
+  next = backoff.Step();
   EXPECT_EQ(next, 510);
-  exec_ctx.now = next;
-  next = backoff.Step(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next);
+  next = backoff.Step();
   EXPECT_EQ(next, 1022);
-  exec_ctx.now = next;
-  next = backoff.Step(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next);
+  next = backoff.Step();
   // Hit the maximum timeout. From this point onwards, retries will increase
   // only by max timeout.
   EXPECT_EQ(next, 1535);
-  exec_ctx.now = next;
-  next = backoff.Step(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next);
+  next = backoff.Step();
   EXPECT_EQ(next, 2048);
-  exec_ctx.now = next;
-  next = backoff.Step(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next);
+  next = backoff.Step();
   EXPECT_EQ(next, 2561);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 TEST(BackOffTest, JitterBackOff) {
@@ -144,9 +140,9 @@ TEST(BackOffTest, JitterBackOff) {
 
   backoff.SetRandomSeed(0);  // force consistent PRNG
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_millis next = backoff.Begin(&exec_ctx);
-  EXPECT_EQ(next - grpc_exec_ctx_now(&exec_ctx), initial_backoff);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_millis next = backoff.Begin();
+  EXPECT_EQ(next - grpc_core::ExecCtx::Get()->Now(), initial_backoff);
 
   grpc_millis expected_next_lower_bound =
       (grpc_millis)((double)current_backoff * (1 - jitter));
@@ -154,10 +150,10 @@ TEST(BackOffTest, JitterBackOff) {
       (grpc_millis)((double)current_backoff * (1 + jitter));
 
   for (int i = 0; i < 10000; i++) {
-    next = backoff.Step(&exec_ctx);
+    next = backoff.Step();
     // next-now must be within (jitter*100)% of the current backoff (which
     // increases by * multiplier up to max_backoff).
-    const grpc_millis timeout_millis = next - grpc_exec_ctx_now(&exec_ctx);
+    const grpc_millis timeout_millis = next - grpc_core::ExecCtx::Get()->Now();
     EXPECT_GE(timeout_millis, expected_next_lower_bound);
     EXPECT_LE(timeout_millis, expected_next_upper_bound);
     current_backoff = std::min(
@@ -167,7 +163,6 @@ TEST(BackOffTest, JitterBackOff) {
     expected_next_upper_bound =
         (grpc_millis)((double)current_backoff * (1 + jitter));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 }  // namespace
diff --git a/test/core/bad_client/bad_client.cc b/test/core/bad_client/bad_client.cc
index 0a7b1c7571..4c1642aa5d 100644
--- a/test/core/bad_client/bad_client.cc
+++ b/test/core/bad_client/bad_client.cc
@@ -50,20 +50,19 @@ static void thd_func(void* arg) {
   gpr_event_set(&a->done_thd, (void*)1);
 }
 
-static void done_write(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void done_write(void* arg, grpc_error* error) {
   thd_args* a = (thd_args*)arg;
   gpr_event_set(&a->done_write, (void*)1);
 }
 
 static void server_setup_transport(void* ts, grpc_transport* transport) {
   thd_args* a = (thd_args*)ts;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_server_setup_transport(&exec_ctx, a->server, transport, nullptr,
+  grpc_core::ExecCtx exec_ctx;
+  grpc_server_setup_transport(a->server, transport, nullptr,
                               grpc_server_get_channel_args(a->server));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void read_done(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void read_done(void* arg, grpc_error* error) {
   gpr_event* read_done = (gpr_event*)arg;
   gpr_event_set(read_done, (void*)1);
 }
@@ -81,7 +80,7 @@ void grpc_run_bad_client_test(
       grpc_slice_from_copied_buffer(client_payload, client_payload_length);
   grpc_slice_buffer outgoing;
   grpc_closure done_write_closure;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_completion_queue* shutdown_cq;
 
   if (client_payload_length < 4 * 1024) {
@@ -115,21 +114,19 @@ void grpc_run_bad_client_test(
                                   GRPC_BAD_CLIENT_REGISTERED_HOST,
                                   GRPC_SRM_PAYLOAD_READ_INITIAL_BYTE_BUFFER, 0);
   grpc_server_start(a.server);
-  transport =
-      grpc_create_chttp2_transport(&exec_ctx, nullptr, sfd.server, false);
+  transport = grpc_create_chttp2_transport(nullptr, sfd.server, false);
   server_setup_transport(&a, transport);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 
   /* Bind everything into the same pollset */
-  grpc_endpoint_add_to_pollset(&exec_ctx, sfd.client, grpc_cq_pollset(a.cq));
-  grpc_endpoint_add_to_pollset(&exec_ctx, sfd.server, grpc_cq_pollset(a.cq));
+  grpc_endpoint_add_to_pollset(sfd.client, grpc_cq_pollset(a.cq));
+  grpc_endpoint_add_to_pollset(sfd.server, grpc_cq_pollset(a.cq));
 
   /* Check a ground truth */
   GPR_ASSERT(grpc_server_has_open_connections(a.server));
 
   /* Start validator */
-  gpr_thd_new(&id, thd_func, &a, nullptr);
+  gpr_thd_new(&id, "grpc_bad_client", thd_func, &a, nullptr);
 
   grpc_slice_buffer_init(&outgoing);
   grpc_slice_buffer_add(&outgoing, slice);
@@ -137,8 +134,8 @@ void grpc_run_bad_client_test(
                     grpc_schedule_on_exec_ctx);
 
   /* Write data */
-  grpc_endpoint_write(&exec_ctx, sfd.client, &outgoing, &done_write_closure);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_endpoint_write(sfd.client, &outgoing, &done_write_closure);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Await completion, unless the request is large and write may not finish
    * before the peer shuts down. */
@@ -149,10 +146,9 @@ void grpc_run_bad_client_test(
 
   if (flags & GRPC_BAD_CLIENT_DISCONNECT) {
     grpc_endpoint_shutdown(
-        &exec_ctx, sfd.client,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Forced Disconnect"));
-    grpc_endpoint_destroy(&exec_ctx, sfd.client);
-    grpc_exec_ctx_finish(&exec_ctx);
+        sfd.client, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Forced Disconnect"));
+    grpc_endpoint_destroy(sfd.client);
+    grpc_core::ExecCtx::Get()->Flush();
     sfd.client = nullptr;
   }
 
@@ -171,9 +167,8 @@ void grpc_run_bad_client_test(
         grpc_closure read_done_closure;
         GRPC_CLOSURE_INIT(&read_done_closure, read_done, &read_done_event,
                           grpc_schedule_on_exec_ctx);
-        grpc_endpoint_read(&exec_ctx, sfd.client, &incoming,
-                           &read_done_closure);
-        grpc_exec_ctx_finish(&exec_ctx);
+        grpc_endpoint_read(sfd.client, &incoming, &read_done_closure);
+        grpc_core::ExecCtx::Get()->Flush();
         do {
           GPR_ASSERT(gpr_time_cmp(deadline, gpr_now(deadline.clock_type)) > 0);
           GPR_ASSERT(
@@ -186,14 +181,13 @@ void grpc_run_bad_client_test(
                 "client validator failed; trying additional read "
                 "in case we didn't get all the data");
       }
-      grpc_slice_buffer_destroy_internal(&exec_ctx, &incoming);
+      grpc_slice_buffer_destroy_internal(&incoming);
     }
     // Shutdown.
     grpc_endpoint_shutdown(
-        &exec_ctx, sfd.client,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
-    grpc_endpoint_destroy(&exec_ctx, sfd.client);
-    grpc_exec_ctx_finish(&exec_ctx);
+        sfd.client, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
+    grpc_endpoint_destroy(sfd.client);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   GPR_ASSERT(
@@ -207,8 +201,7 @@ void grpc_run_bad_client_test(
   grpc_completion_queue_destroy(shutdown_cq);
   grpc_server_destroy(a.server);
   grpc_completion_queue_destroy(a.cq);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &outgoing);
+  grpc_slice_buffer_destroy_internal(&outgoing);
 
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
 }
diff --git a/test/core/bad_client/tests/badreq.cc b/test/core/bad_client/tests/badreq.cc
index c30244e0cd..eeaf4c9974 100644
--- a/test/core/bad_client/tests/badreq.cc
+++ b/test/core/bad_client/tests/badreq.cc
@@ -20,6 +20,8 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
+
 #include "src/core/lib/surface/server.h"
 #include "test/core/end2end/cq_verifier.h"
 
@@ -38,6 +40,7 @@ static void verifier(grpc_server* server, grpc_completion_queue* cq,
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   /* invalid content type */
   GRPC_RUN_BAD_CLIENT_TEST(
@@ -126,5 +129,6 @@ int main(int argc, char** argv) {
       "\x10\x0auser-agent\"bad-client grpc-c/0.12.0.0 (linux)",
       GRPC_BAD_CLIENT_DISCONNECT);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/connection_prefix.cc b/test/core/bad_client/tests/connection_prefix.cc
index 47252f9f10..4aab234d3e 100644
--- a/test/core/bad_client/tests/connection_prefix.cc
+++ b/test/core/bad_client/tests/connection_prefix.cc
@@ -30,6 +30,7 @@ static void verifier(grpc_server* server, grpc_completion_queue* cq,
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   GRPC_RUN_BAD_CLIENT_TEST(verifier, nullptr, "X", 0);
   GRPC_RUN_BAD_CLIENT_TEST(verifier, nullptr, "PX", 0);
@@ -57,5 +58,7 @@ int main(int argc, char** argv) {
                            0);
   GRPC_RUN_BAD_CLIENT_TEST(verifier, nullptr, "PRI * HTTP/2.0\r\n\r\nSM\r\n\rX",
                            0);
+
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/head_of_line_blocking.cc b/test/core/bad_client/tests/head_of_line_blocking.cc
index bbc5611991..f56c4d71dd 100644
--- a/test/core/bad_client/tests/head_of_line_blocking.cc
+++ b/test/core/bad_client/tests/head_of_line_blocking.cc
@@ -20,6 +20,7 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/lib/surface/server.h"
@@ -109,6 +110,7 @@ static void addbuf(const void* data, size_t len) {
 int main(int argc, char** argv) {
   int i;
   grpc_test_init(argc, argv);
+  grpc_init();
 
 #define NUM_FRAMES 10
 #define FRAME_SIZE 1000
@@ -131,6 +133,7 @@ int main(int argc, char** argv) {
   }
   grpc_run_bad_client_test(verifier, nullptr, g_buffer, g_count, 0);
   gpr_free(g_buffer);
+  grpc_shutdown();
 
   return 0;
 }
diff --git a/test/core/bad_client/tests/headers.cc b/test/core/bad_client/tests/headers.cc
index 50bb72c493..2aa1b280ce 100644
--- a/test/core/bad_client/tests/headers.cc
+++ b/test/core/bad_client/tests/headers.cc
@@ -34,6 +34,7 @@ static void verifier(grpc_server* server, grpc_completion_queue* cq,
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   /* partial http2 header prefixes */
   GRPC_RUN_BAD_CLIENT_TEST(verifier, nullptr, PFX_STR "\x00",
@@ -335,5 +336,6 @@ int main(int argc, char** argv) {
                            "15 seconds",
                            GRPC_BAD_CLIENT_DISCONNECT);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/initial_settings_frame.cc b/test/core/bad_client/tests/initial_settings_frame.cc
index edc52f503e..0220000ece 100644
--- a/test/core/bad_client/tests/initial_settings_frame.cc
+++ b/test/core/bad_client/tests/initial_settings_frame.cc
@@ -33,6 +33,7 @@ static void verifier(grpc_server* server, grpc_completion_queue* cq,
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   /* various partial prefixes */
   GRPC_RUN_BAD_CLIENT_TEST(verifier, nullptr, PFX_STR "\x00",
@@ -106,5 +107,6 @@ int main(int argc, char** argv) {
                            PFX_STR ONE_SETTING_HDR "\x00\x99\x00\x00\x00\x00",
                            GRPC_BAD_CLIENT_DISCONNECT);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/server_registered_method.cc b/test/core/bad_client/tests/server_registered_method.cc
index 6613c94b41..c2dc9c66af 100644
--- a/test/core/bad_client/tests/server_registered_method.cc
+++ b/test/core/bad_client/tests/server_registered_method.cc
@@ -77,6 +77,7 @@ static void verifier_fails(grpc_server* server, grpc_completion_queue* cq,
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   /* body generated with
    * tools/codegen/core/gen_server_registered_method_bad_client_test_body.py */
@@ -123,5 +124,6 @@ int main(int argc, char** argv) {
       "\x00\x00\x07\x00\x01\x00\x00\x00\x01\x00\x00\x00\x00\x02\x00\x00",
       0);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/simple_request.cc b/test/core/bad_client/tests/simple_request.cc
index 9f4a03e69b..c80fc5cb4a 100644
--- a/test/core/bad_client/tests/simple_request.cc
+++ b/test/core/bad_client/tests/simple_request.cc
@@ -20,6 +20,8 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
+
 #include "src/core/lib/surface/server.h"
 #include "test/core/end2end/cq_verifier.h"
 
@@ -122,6 +124,7 @@ static void failure_verifier(grpc_server* server, grpc_completion_queue* cq,
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   /* basic request: check that things are working */
   GRPC_RUN_BAD_CLIENT_TEST(verifier, nullptr, PFX_STR, 0);
@@ -164,5 +167,6 @@ int main(int argc, char** argv) {
   GRPC_RUN_BAD_CLIENT_TEST(failure_verifier, nullptr,
                            PFX_STR "\x00\x00\x00\x03\x10\x00\x00\x00\x01", 0);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/unknown_frame.cc b/test/core/bad_client/tests/unknown_frame.cc
index d962a4244d..b1b618a43f 100644
--- a/test/core/bad_client/tests/unknown_frame.cc
+++ b/test/core/bad_client/tests/unknown_frame.cc
@@ -33,6 +33,7 @@ static void verifier(grpc_server* server, grpc_completion_queue* cq,
 }
 
 int main(int argc, char** argv) {
+  grpc_init();
   grpc_test_init(argc, argv);
 
   /* test adding prioritization data */
@@ -40,5 +41,6 @@ int main(int argc, char** argv) {
                            PFX_STR "\x00\x00\x00\x88\x00\x00\x00\x00\x01",
                            GRPC_BAD_CLIENT_DISCONNECT);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/window_overflow.cc b/test/core/bad_client/tests/window_overflow.cc
index f4bd81828b..ed8279c951 100644
--- a/test/core/bad_client/tests/window_overflow.cc
+++ b/test/core/bad_client/tests/window_overflow.cc
@@ -20,6 +20,7 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/lib/surface/server.h"
@@ -72,6 +73,7 @@ int main(int argc, char** argv) {
 #define SEND_SIZE (6 * 1024 * 1024)
 #define NUM_FRAMES (SEND_SIZE / FRAME_SIZE + 1)
   grpc_test_init(argc, argv);
+  grpc_init();
 
   addbuf(PFX_STR, sizeof(PFX_STR) - 1);
   for (i = 0; i < NUM_FRAMES; i++) {
@@ -93,6 +95,7 @@ int main(int argc, char** argv) {
   grpc_run_bad_client_test(verifier, nullptr, g_buffer, g_count,
                            GRPC_BAD_CLIENT_LARGE_REQUEST);
   gpr_free(g_buffer);
+  grpc_shutdown();
 
   return 0;
 }
diff --git a/test/core/channel/channel_args_test.cc b/test/core/channel/channel_args_test.cc
index e8b3334185..4a8195e984 100644
--- a/test/core/channel/channel_args_test.cc
+++ b/test/core/channel/channel_args_test.cc
@@ -26,7 +26,7 @@
 #include "test/core/util/test_config.h"
 
 static void test_create(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   grpc_arg arg_int;
   grpc_arg arg_string;
@@ -55,12 +55,11 @@ static void test_create(void) {
   GPR_ASSERT(strcmp(ch_args->args[1].value.string, arg_string.value.string) ==
              0);
 
-  grpc_channel_args_destroy(&exec_ctx, ch_args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_args_destroy(ch_args);
 }
 
 static void test_set_compression_algorithm(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_args* ch_args;
 
   ch_args =
@@ -70,12 +69,11 @@ static void test_set_compression_algorithm(void) {
                     GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM) == 0);
   GPR_ASSERT(ch_args->args[0].type == GRPC_ARG_INTEGER);
 
-  grpc_channel_args_destroy(&exec_ctx, ch_args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_args_destroy(ch_args);
 }
 
 static void test_compression_algorithm_states(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_args *ch_args, *ch_args_wo_gzip, *ch_args_wo_gzip_deflate;
   unsigned states_bitset;
   size_t i;
@@ -91,10 +89,10 @@ static void test_compression_algorithm_states(void) {
 
   /* disable gzip and deflate */
   ch_args_wo_gzip = grpc_channel_args_compression_algorithm_set_state(
-      &exec_ctx, &ch_args, GRPC_COMPRESS_GZIP, 0);
+      &ch_args, GRPC_COMPRESS_GZIP, 0);
   GPR_ASSERT(ch_args == ch_args_wo_gzip);
   ch_args_wo_gzip_deflate = grpc_channel_args_compression_algorithm_set_state(
-      &exec_ctx, &ch_args_wo_gzip, GRPC_COMPRESS_DEFLATE, 0);
+      &ch_args_wo_gzip, GRPC_COMPRESS_DEFLATE, 0);
   GPR_ASSERT(ch_args_wo_gzip == ch_args_wo_gzip_deflate);
 
   states_bitset = (unsigned)grpc_channel_args_compression_algorithm_get_states(
@@ -109,7 +107,7 @@ static void test_compression_algorithm_states(void) {
 
   /* re-enabled gzip only */
   ch_args_wo_gzip = grpc_channel_args_compression_algorithm_set_state(
-      &exec_ctx, &ch_args_wo_gzip_deflate, GRPC_COMPRESS_GZIP, 1);
+      &ch_args_wo_gzip_deflate, GRPC_COMPRESS_GZIP, 1);
   GPR_ASSERT(ch_args_wo_gzip == ch_args_wo_gzip_deflate);
 
   states_bitset = (unsigned)grpc_channel_args_compression_algorithm_get_states(
@@ -122,8 +120,7 @@ static void test_compression_algorithm_states(void) {
     }
   }
 
-  grpc_channel_args_destroy(&exec_ctx, ch_args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_args_destroy(ch_args);
 }
 
 static void test_set_socket_mutator(void) {
@@ -137,9 +134,8 @@ static void test_set_socket_mutator(void) {
   GPR_ASSERT(ch_args->args[0].type == GRPC_ARG_POINTER);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, ch_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(ch_args);
   }
 }
 
diff --git a/test/core/channel/channel_stack_builder_test.cc b/test/core/channel/channel_stack_builder_test.cc
index a67f0efafe..ef6db81b0b 100644
--- a/test/core/channel/channel_stack_builder_test.cc
+++ b/test/core/channel/channel_stack_builder_test.cc
@@ -29,34 +29,30 @@
 #include "src/core/lib/surface/channel_init.h"
 #include "test/core/util/test_config.h"
 
-static grpc_error* channel_init_func(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* channel_init_func(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* call_init_func(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* call_init_func(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void channel_destroy_func(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void channel_destroy_func(grpc_channel_element* elem) {}
 
-static void call_destroy_func(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void call_destroy_func(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
-static void call_func(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void call_func(grpc_call_element* elem,
                       grpc_transport_stream_op_batch* op) {}
 
-static void channel_func(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
-                         grpc_transport_op* op) {
+static void channel_func(grpc_channel_element* elem, grpc_transport_op* op) {
   if (op->disconnect_with_error != GRPC_ERROR_NONE) {
     GRPC_ERROR_UNREF(op->disconnect_with_error);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, op->on_consumed, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(op->on_consumed, GRPC_ERROR_NONE);
 }
 
 bool g_replacement_fn_called = false;
@@ -106,8 +102,7 @@ const grpc_channel_filter original_filter = {
     grpc_channel_next_get_info,
     "filter_name"};
 
-static bool add_replacement_filter(grpc_exec_ctx* exec_ctx,
-                                   grpc_channel_stack_builder* builder,
+static bool add_replacement_filter(grpc_channel_stack_builder* builder,
                                    void* arg) {
   const grpc_channel_filter* filter =
       static_cast<const grpc_channel_filter*>(arg);
@@ -118,8 +113,7 @@ static bool add_replacement_filter(grpc_exec_ctx* exec_ctx,
       builder, filter, set_arg_once_fn, &g_replacement_fn_called);
 }
 
-static bool add_original_filter(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_stack_builder* builder,
+static bool add_original_filter(grpc_channel_stack_builder* builder,
                                 void* arg) {
   return grpc_channel_stack_builder_prepend_filter(
       builder, (const grpc_channel_filter*)arg, set_arg_once_fn,
diff --git a/test/core/channel/channel_stack_test.cc b/test/core/channel/channel_stack_test.cc
index 988ea9bac9..ef43facd6e 100644
--- a/test/core/channel/channel_stack_test.cc
+++ b/test/core/channel/channel_stack_test.cc
@@ -27,8 +27,7 @@
 #include "src/core/lib/slice/slice_internal.h"
 #include "test/core/util/test_config.h"
 
-static grpc_error* channel_init_func(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* channel_init_func(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(args->channel_args->num_args == 1);
   GPR_ASSERT(args->channel_args->args[0].type == GRPC_ARG_INTEGER);
@@ -40,42 +39,37 @@ static grpc_error* channel_init_func(grpc_exec_ctx* exec_ctx,
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* call_init_func(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* call_init_func(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   ++*(int*)(elem->channel_data);
   *(int*)(elem->call_data) = 0;
   return GRPC_ERROR_NONE;
 }
 
-static void channel_destroy_func(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void channel_destroy_func(grpc_channel_element* elem) {}
 
-static void call_destroy_func(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void call_destroy_func(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   ++*(int*)(elem->channel_data);
 }
 
-static void call_func(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void call_func(grpc_call_element* elem,
                       grpc_transport_stream_op_batch* op) {
   ++*(int*)(elem->call_data);
 }
 
-static void channel_func(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
-                         grpc_transport_op* op) {
+static void channel_func(grpc_channel_element* elem, grpc_transport_op* op) {
   ++*(int*)(elem->channel_data);
 }
 
-static void free_channel(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
-  grpc_channel_stack_destroy(exec_ctx, static_cast<grpc_channel_stack*>(arg));
+static void free_channel(void* arg, grpc_error* error) {
+  grpc_channel_stack_destroy(static_cast<grpc_channel_stack*>(arg));
   gpr_free(arg);
 }
 
-static void free_call(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
-  grpc_call_stack_destroy(exec_ctx, static_cast<grpc_call_stack*>(arg), nullptr,
-                          nullptr);
+static void free_call(void* arg, grpc_error* error) {
+  grpc_call_stack_destroy(static_cast<grpc_call_stack*>(arg), nullptr, nullptr);
   gpr_free(arg);
 }
 
@@ -101,7 +95,7 @@ static void test_create_channel_stack(void) {
   grpc_channel_args chan_args;
   int* channel_data;
   int* call_data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_slice path = grpc_slice_from_static_string("/service/method");
 
   arg.type = GRPC_ARG_INTEGER;
@@ -113,8 +107,8 @@ static void test_create_channel_stack(void) {
 
   channel_stack = static_cast<grpc_channel_stack*>(
       gpr_malloc(grpc_channel_stack_size(&filters, 1)));
-  grpc_channel_stack_init(&exec_ctx, 1, free_channel, channel_stack, &filters,
-                          1, &chan_args, nullptr, "test", channel_stack);
+  grpc_channel_stack_init(1, free_channel, channel_stack, &filters, 1,
+                          &chan_args, nullptr, "test", channel_stack);
   GPR_ASSERT(channel_stack->count == 1);
   channel_elem = grpc_channel_stack_element(channel_stack, 0);
   channel_data = (int*)channel_elem->channel_data;
@@ -132,8 +126,8 @@ static void test_create_channel_stack(void) {
       nullptr,                      /* arena */
       nullptr                       /* call_combiner */
   };
-  grpc_error* error = grpc_call_stack_init(&exec_ctx, channel_stack, 1,
-                                           free_call, call_stack, &args);
+  grpc_error* error =
+      grpc_call_stack_init(channel_stack, 1, free_call, call_stack, &args);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(call_stack->count == 1);
   call_elem = grpc_call_stack_element(call_stack, 0);
@@ -143,14 +137,13 @@ static void test_create_channel_stack(void) {
   GPR_ASSERT(*call_data == 0);
   GPR_ASSERT(*channel_data == 1);
 
-  GRPC_CALL_STACK_UNREF(&exec_ctx, call_stack, "done");
-  grpc_exec_ctx_flush(&exec_ctx);
+  GRPC_CALL_STACK_UNREF(call_stack, "done");
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(*channel_data == 2);
 
-  GRPC_CHANNEL_STACK_UNREF(&exec_ctx, channel_stack, "done");
+  GRPC_CHANNEL_STACK_UNREF(channel_stack, "done");
 
-  grpc_slice_unref_internal(&exec_ctx, path);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_unref_internal(path);
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/channel/minimal_stack_is_minimal_test.cc b/test/core/channel/minimal_stack_is_minimal_test.cc
index e0cffa39a8..3495f603e4 100644
--- a/test/core/channel/minimal_stack_is_minimal_test.cc
+++ b/test/core/channel/minimal_stack_is_minimal_test.cc
@@ -125,12 +125,10 @@ static int check_stack(const char* file, int line, const char* transport_name,
     grpc_channel_stack_builder_set_transport(builder, &fake_transport);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_stack_builder_set_channel_arguments(&exec_ctx, builder,
-                                                     channel_args);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_stack_builder_set_channel_arguments(builder, channel_args);
     GPR_ASSERT(grpc_channel_init_create_stack(
-        &exec_ctx, builder, (grpc_channel_stack_type)channel_stack_type));
-    grpc_exec_ctx_finish(&exec_ctx);
+        builder, (grpc_channel_stack_type)channel_stack_type));
   }
 
   // build up our expectation list
@@ -212,10 +210,9 @@ static int check_stack(const char* file, int line, const char* transport_name,
   gpr_free(expect);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_stack_builder_destroy(&exec_ctx, builder);
-    grpc_channel_args_destroy(&exec_ctx, channel_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_stack_builder_destroy(builder);
+    grpc_channel_args_destroy(channel_args);
   }
 
   return result;
diff --git a/test/core/client_channel/lb_policies_test.cc b/test/core/client_channel/lb_policies_test.cc
index 5f8d3b84cc..847ea0066b 100644
--- a/test/core/client_channel/lb_policies_test.cc
+++ b/test/core/client_channel/lb_policies_test.cc
@@ -651,9 +651,8 @@ static void test_get_channel_info() {
   grpc_channel_args* args = grpc_channel_args_copy_and_add(nullptr, &arg, 1);
   channel = grpc_insecure_channel_create("ipv4:127.0.0.1:1234", args, nullptr);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(args);
   }
   // Ensures that resolver returns.
   grpc_channel_check_connectivity_state(channel, true /* try_to_connect */);
@@ -959,7 +958,7 @@ static void verify_rebirth_round_robin(const servers_fixture* f,
 }
 
 int main(int argc, char** argv) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   test_spec* spec;
   size_t i;
   const size_t NUM_ITERS = 10;
@@ -969,9 +968,9 @@ int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   grpc_tracer_set_enabled("round_robin", 1);
 
-  GPR_ASSERT(grpc_lb_policy_create(&exec_ctx, "this-lb-policy-does-not-exist",
-                                   nullptr) == nullptr);
-  GPR_ASSERT(grpc_lb_policy_create(&exec_ctx, nullptr, nullptr) == nullptr);
+  GPR_ASSERT(grpc_lb_policy_create("this-lb-policy-does-not-exist", nullptr) ==
+             nullptr);
+  GPR_ASSERT(grpc_lb_policy_create(nullptr, nullptr) == nullptr);
 
   spec = test_spec_create(NUM_ITERS, NUM_SERVERS);
   /* everything is fine, all servers stay up the whole time and life's peachy
@@ -1025,7 +1024,6 @@ int main(int argc, char** argv) {
   test_ping();
   test_get_channel_info();
 
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/client_channel/parse_address_test.cc b/test/core/client_channel/parse_address_test.cc
index 94f76da920..6d56961d84 100644
--- a/test/core/client_channel/parse_address_test.cc
+++ b/test/core/client_channel/parse_address_test.cc
@@ -24,6 +24,7 @@
 #include <sys/un.h>
 #endif
 
+#include <grpc/grpc.h>
 #include <grpc/support/log.h>
 
 #include "src/core/lib/iomgr/exec_ctx.h"
@@ -33,8 +34,8 @@
 #ifdef GRPC_HAVE_UNIX_SOCKET
 
 static void test_grpc_parse_unix(const char* uri_text, const char* pathname) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(uri_text, 0);
   grpc_resolved_address addr;
 
   GPR_ASSERT(1 == grpc_parse_unix(uri, &addr));
@@ -43,7 +44,6 @@ static void test_grpc_parse_unix(const char* uri_text, const char* pathname) {
   GPR_ASSERT(0 == strcmp(addr_un->sun_path, pathname));
 
   grpc_uri_destroy(uri);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 #else /* GRPC_HAVE_UNIX_SOCKET */
@@ -54,8 +54,8 @@ static void test_grpc_parse_unix(const char* uri_text, const char* pathname) {}
 
 static void test_grpc_parse_ipv4(const char* uri_text, const char* host,
                                  unsigned short port) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(uri_text, 0);
   grpc_resolved_address addr;
   char ntop_buf[INET_ADDRSTRLEN];
 
@@ -68,13 +68,12 @@ static void test_grpc_parse_ipv4(const char* uri_text, const char* host,
   GPR_ASSERT(ntohs(addr_in->sin_port) == port);
 
   grpc_uri_destroy(uri);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_grpc_parse_ipv6(const char* uri_text, const char* host,
                                  unsigned short port, uint32_t scope_id) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(uri_text, 0);
   grpc_resolved_address addr;
   char ntop_buf[INET6_ADDRSTRLEN];
 
@@ -88,14 +87,16 @@ static void test_grpc_parse_ipv6(const char* uri_text, const char* host,
   GPR_ASSERT(addr_in6->sin6_scope_id == scope_id);
 
   grpc_uri_destroy(uri);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   test_grpc_parse_unix("unix:/path/name", "/path/name");
   test_grpc_parse_ipv4("ipv4:192.0.2.1:12345", "192.0.2.1", 12345);
   test_grpc_parse_ipv6("ipv6:[2001:db8::1]:12345", "2001:db8::1", 12345, 0);
   test_grpc_parse_ipv6("ipv6:[2001:db8::1%252]:12345", "2001:db8::1", 12345, 2);
+
+  grpc_shutdown();
 }
diff --git a/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc b/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc
index dcf315eba5..18a795fbcb 100644
--- a/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc
+++ b/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc
@@ -35,8 +35,7 @@ static gpr_mu g_mu;
 static bool g_fail_resolution = true;
 static grpc_combiner* g_combiner;
 
-static void my_resolve_address(grpc_exec_ctx* exec_ctx, const char* addr,
-                               const char* default_port,
+static void my_resolve_address(const char* addr, const char* default_port,
                                grpc_pollset_set* interested_parties,
                                grpc_closure* on_done,
                                grpc_resolved_addresses** addrs) {
@@ -55,13 +54,13 @@ static void my_resolve_address(grpc_exec_ctx* exec_ctx, const char* addr,
         gpr_malloc(sizeof(*(*addrs)->addrs)));
     (*addrs)->addrs[0].len = 123;
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, error);
+  GRPC_CLOSURE_SCHED(on_done, error);
 }
 
 static grpc_ares_request* my_dns_lookup_ares(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* addr,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** lb_addrs, bool check_grpclb,
+    const char* dns_server, const char* addr, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** lb_addrs, bool check_grpclb,
     char** service_config_json) {
   gpr_mu_lock(&g_mu);
   GPR_ASSERT(0 == strcmp("test", addr));
@@ -76,27 +75,26 @@ static grpc_ares_request* my_dns_lookup_ares(
     grpc_lb_addresses_set_address(*lb_addrs, 0, nullptr, 0, false, nullptr,
                                   nullptr);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, error);
+  GRPC_CLOSURE_SCHED(on_done, error);
   return nullptr;
 }
 
-static grpc_resolver* create_resolver(grpc_exec_ctx* exec_ctx,
-                                      const char* name) {
+static grpc_resolver* create_resolver(const char* name) {
   grpc_resolver_factory* factory = grpc_resolver_factory_lookup("dns");
-  grpc_uri* uri = grpc_uri_parse(exec_ctx, name, 0);
+  grpc_uri* uri = grpc_uri_parse(name, 0);
   GPR_ASSERT(uri);
   grpc_resolver_args args;
   memset(&args, 0, sizeof(args));
   args.uri = uri;
   args.combiner = g_combiner;
   grpc_resolver* resolver =
-      grpc_resolver_factory_create_resolver(exec_ctx, factory, &args);
+      grpc_resolver_factory_create_resolver(factory, &args);
   grpc_resolver_factory_unref(factory);
   grpc_uri_destroy(uri);
   return resolver;
 }
 
-static void on_done(grpc_exec_ctx* exec_ctx, void* ev, grpc_error* error) {
+static void on_done(void* ev, grpc_error* error) {
   gpr_event_set((gpr_event*)ev, (void*)1);
 }
 
@@ -107,9 +105,8 @@ static bool wait_loop(int deadline_seconds, gpr_event* ev) {
     if (gpr_event_wait(ev, grpc_timeout_seconds_to_deadline(1))) return true;
     deadline_seconds--;
 
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_timer_check(&exec_ctx, nullptr);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_timer_check(nullptr);
   }
   return false;
 }
@@ -120,16 +117,14 @@ typedef struct next_args {
   grpc_closure* on_complete;
 } next_args;
 
-static void call_resolver_next_now_lock_taken(grpc_exec_ctx* exec_ctx,
-                                              void* arg,
+static void call_resolver_next_now_lock_taken(void* arg,
                                               grpc_error* error_unused) {
   next_args* a = static_cast<next_args*>(arg);
-  grpc_resolver_next_locked(exec_ctx, a->resolver, a->result, a->on_complete);
+  grpc_resolver_next_locked(a->resolver, a->result, a->on_complete);
   gpr_free(a);
 }
 
-static void call_resolver_next_after_locking(grpc_exec_ctx* exec_ctx,
-                                             grpc_resolver* resolver,
+static void call_resolver_next_after_locking(grpc_resolver* resolver,
                                              grpc_channel_args** result,
                                              grpc_closure* on_complete) {
   next_args* a = static_cast<next_args*>(gpr_malloc(sizeof(*a)));
@@ -137,7 +132,6 @@ static void call_resolver_next_after_locking(grpc_exec_ctx* exec_ctx,
   a->result = result;
   a->on_complete = on_complete;
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_CREATE(call_resolver_next_now_lock_taken, a,
                           grpc_combiner_scheduler(resolver->combiner)),
       GRPC_ERROR_NONE);
@@ -153,30 +147,31 @@ int main(int argc, char** argv) {
   grpc_dns_lookup_ares = my_dns_lookup_ares;
   grpc_channel_args* result = (grpc_channel_args*)1;
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_resolver* resolver = create_resolver(&exec_ctx, "dns:test");
-  gpr_event ev1;
-  gpr_event_init(&ev1);
-  call_resolver_next_after_locking(
-      &exec_ctx, resolver, &result,
-      GRPC_CLOSURE_CREATE(on_done, &ev1, grpc_schedule_on_exec_ctx));
-  grpc_exec_ctx_flush(&exec_ctx);
-  GPR_ASSERT(wait_loop(5, &ev1));
-  GPR_ASSERT(result == nullptr);
-
-  gpr_event ev2;
-  gpr_event_init(&ev2);
-  call_resolver_next_after_locking(
-      &exec_ctx, resolver, &result,
-      GRPC_CLOSURE_CREATE(on_done, &ev2, grpc_schedule_on_exec_ctx));
-  grpc_exec_ctx_flush(&exec_ctx);
-  GPR_ASSERT(wait_loop(30, &ev2));
-  GPR_ASSERT(result != nullptr);
-
-  grpc_channel_args_destroy(&exec_ctx, result);
-  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test");
-  GRPC_COMBINER_UNREF(&exec_ctx, g_combiner, "test");
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resolver* resolver = create_resolver("dns:test");
+    gpr_event ev1;
+    gpr_event_init(&ev1);
+    call_resolver_next_after_locking(
+        resolver, &result,
+        GRPC_CLOSURE_CREATE(on_done, &ev1, grpc_schedule_on_exec_ctx));
+    grpc_core::ExecCtx::Get()->Flush();
+    GPR_ASSERT(wait_loop(5, &ev1));
+    GPR_ASSERT(result == nullptr);
+
+    gpr_event ev2;
+    gpr_event_init(&ev2);
+    call_resolver_next_after_locking(
+        resolver, &result,
+        GRPC_CLOSURE_CREATE(on_done, &ev2, grpc_schedule_on_exec_ctx));
+    grpc_core::ExecCtx::Get()->Flush();
+    GPR_ASSERT(wait_loop(30, &ev2));
+    GPR_ASSERT(result != nullptr);
+
+    grpc_channel_args_destroy(result);
+    GRPC_RESOLVER_UNREF(resolver, "test");
+    GRPC_COMBINER_UNREF(g_combiner, "test");
+  }
 
   grpc_shutdown();
   gpr_mu_destroy(&g_mu);
diff --git a/test/core/client_channel/resolvers/dns_resolver_test.cc b/test/core/client_channel/resolvers/dns_resolver_test.cc
index 4c040caeb9..80667908ef 100644
--- a/test/core/client_channel/resolvers/dns_resolver_test.cc
+++ b/test/core/client_channel/resolvers/dns_resolver_test.cc
@@ -28,8 +28,8 @@
 static grpc_combiner* g_combiner;
 
 static void test_succeeds(grpc_resolver_factory* factory, const char* string) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, string, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(string, 0);
   grpc_resolver_args args;
   grpc_resolver* resolver;
   gpr_log(GPR_DEBUG, "test: '%s' should be valid for '%s'", string,
@@ -38,16 +38,15 @@ static void test_succeeds(grpc_resolver_factory* factory, const char* string) {
   memset(&args, 0, sizeof(args));
   args.uri = uri;
   args.combiner = g_combiner;
-  resolver = grpc_resolver_factory_create_resolver(&exec_ctx, factory, &args);
+  resolver = grpc_resolver_factory_create_resolver(factory, &args);
   GPR_ASSERT(resolver != nullptr);
-  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test_succeeds");
+  GRPC_RESOLVER_UNREF(resolver, "test_succeeds");
   grpc_uri_destroy(uri);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_fails(grpc_resolver_factory* factory, const char* string) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, string, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(string, 0);
   grpc_resolver_args args;
   grpc_resolver* resolver;
   gpr_log(GPR_DEBUG, "test: '%s' should be invalid for '%s'", string,
@@ -56,10 +55,9 @@ static void test_fails(grpc_resolver_factory* factory, const char* string) {
   memset(&args, 0, sizeof(args));
   args.uri = uri;
   args.combiner = g_combiner;
-  resolver = grpc_resolver_factory_create_resolver(&exec_ctx, factory, &args);
+  resolver = grpc_resolver_factory_create_resolver(factory, &args);
   GPR_ASSERT(resolver == nullptr);
   grpc_uri_destroy(uri);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char** argv) {
@@ -82,9 +80,8 @@ int main(int argc, char** argv) {
 
   grpc_resolver_factory_unref(dns);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GRPC_COMBINER_UNREF(&exec_ctx, g_combiner, "test");
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    GRPC_COMBINER_UNREF(g_combiner, "test");
   }
   grpc_shutdown();
 
diff --git a/test/core/client_channel/resolvers/fake_resolver_test.cc b/test/core/client_channel/resolvers/fake_resolver_test.cc
index d5538e9621..d85cbb1d03 100644
--- a/test/core/client_channel/resolvers/fake_resolver_test.cc
+++ b/test/core/client_channel/resolvers/fake_resolver_test.cc
@@ -33,7 +33,7 @@
 #include "test/core/util/test_config.h"
 
 static grpc_resolver* build_fake_resolver(
-    grpc_exec_ctx* exec_ctx, grpc_combiner* combiner,
+    grpc_combiner* combiner,
     grpc_fake_resolver_response_generator* response_generator) {
   grpc_resolver_factory* factory = grpc_resolver_factory_lookup("fake");
   grpc_arg generator_arg =
@@ -44,7 +44,7 @@ static grpc_resolver* build_fake_resolver(
   args.args = &channel_args;
   args.combiner = combiner;
   grpc_resolver* resolver =
-      grpc_resolver_factory_create_resolver(exec_ctx, factory, &args);
+      grpc_resolver_factory_create_resolver(factory, &args);
   grpc_resolver_factory_unref(factory);
   return resolver;
 }
@@ -55,7 +55,7 @@ typedef struct on_resolution_arg {
   gpr_event ev;
 } on_resolution_arg;
 
-void on_resolution_cb(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+void on_resolution_cb(void* arg, grpc_error* error) {
   on_resolution_arg* res = static_cast<on_resolution_arg*>(arg);
   // We only check the addresses channel arg because that's the only one
   // explicitly set by the test via
@@ -66,24 +66,23 @@ void on_resolution_cb(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
       grpc_lb_addresses_find_channel_arg(res->expected_resolver_result);
   GPR_ASSERT(
       grpc_lb_addresses_cmp(actual_lb_addresses, expected_lb_addresses) == 0);
-  grpc_channel_args_destroy(exec_ctx, res->resolver_result);
-  grpc_channel_args_destroy(exec_ctx, res->expected_resolver_result);
+  grpc_channel_args_destroy(res->resolver_result);
+  grpc_channel_args_destroy(res->expected_resolver_result);
   gpr_event_set(&res->ev, (void*)1);
 }
 
 static void test_fake_resolver() {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_combiner* combiner = grpc_combiner_create();
   // Create resolver.
   grpc_fake_resolver_response_generator* response_generator =
       grpc_fake_resolver_response_generator_create();
-  grpc_resolver* resolver =
-      build_fake_resolver(&exec_ctx, combiner, response_generator);
+  grpc_resolver* resolver = build_fake_resolver(combiner, response_generator);
   GPR_ASSERT(resolver != nullptr);
 
   // Setup expectations.
-  grpc_uri* uris[] = {grpc_uri_parse(&exec_ctx, "ipv4:10.2.1.1:1234", true),
-                      grpc_uri_parse(&exec_ctx, "ipv4:127.0.0.1:4321", true)};
+  grpc_uri* uris[] = {grpc_uri_parse("ipv4:10.2.1.1:1234", true),
+                      grpc_uri_parse("ipv4:127.0.0.1:4321", true)};
   const char* balancer_names[] = {"name1", "name2"};
   const bool is_balancer[] = {true, false};
   grpc_lb_addresses* addresses = grpc_lb_addresses_create(3, nullptr);
@@ -96,7 +95,7 @@ static void test_fake_resolver() {
       grpc_lb_addresses_create_channel_arg(addresses);
   grpc_channel_args* results =
       grpc_channel_args_copy_and_add(nullptr, &addresses_arg, 1);
-  grpc_lb_addresses_destroy(&exec_ctx, addresses);
+  grpc_lb_addresses_destroy(addresses);
   on_resolution_arg on_res_arg;
   memset(&on_res_arg, 0, sizeof(on_res_arg));
   on_res_arg.expected_resolver_result = results;
@@ -106,17 +105,16 @@ static void test_fake_resolver() {
 
   // Set resolver results and trigger first resolution. on_resolution_cb
   // performs the checks.
-  grpc_fake_resolver_response_generator_set_response(
-      &exec_ctx, response_generator, results);
-  grpc_resolver_next_locked(&exec_ctx, resolver, &on_res_arg.resolver_result,
+  grpc_fake_resolver_response_generator_set_response(response_generator,
+                                                     results);
+  grpc_resolver_next_locked(resolver, &on_res_arg.resolver_result,
                             on_resolution);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(gpr_event_wait(&on_res_arg.ev,
                             grpc_timeout_seconds_to_deadline(5)) != nullptr);
 
   // Setup update.
-  grpc_uri* uris_update[] = {
-      grpc_uri_parse(&exec_ctx, "ipv4:192.168.1.0:31416", true)};
+  grpc_uri* uris_update[] = {grpc_uri_parse("ipv4:192.168.1.0:31416", true)};
   const char* balancer_names_update[] = {"name3"};
   const bool is_balancer_update[] = {false};
   grpc_lb_addresses* addresses_update = grpc_lb_addresses_create(1, nullptr);
@@ -131,7 +129,7 @@ static void test_fake_resolver() {
       grpc_lb_addresses_create_channel_arg(addresses_update);
   grpc_channel_args* results_update =
       grpc_channel_args_copy_and_add(nullptr, &addresses_update_arg, 1);
-  grpc_lb_addresses_destroy(&exec_ctx, addresses_update);
+  grpc_lb_addresses_destroy(addresses_update);
 
   // Setup expectations for the update.
   on_resolution_arg on_res_arg_update;
@@ -142,27 +140,27 @@ static void test_fake_resolver() {
                                       grpc_combiner_scheduler(combiner));
 
   // Set updated resolver results and trigger a second resolution.
-  grpc_fake_resolver_response_generator_set_response(
-      &exec_ctx, response_generator, results_update);
-  grpc_resolver_next_locked(&exec_ctx, resolver,
-                            &on_res_arg_update.resolver_result, on_resolution);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_fake_resolver_response_generator_set_response(response_generator,
+                                                     results_update);
+  grpc_resolver_next_locked(resolver, &on_res_arg_update.resolver_result,
+                            on_resolution);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(gpr_event_wait(&on_res_arg_update.ev,
                             grpc_timeout_seconds_to_deadline(5)) != nullptr);
 
   // Requesting a new resolution without re-senting the response shouldn't
   // trigger the resolution callback.
   memset(&on_res_arg, 0, sizeof(on_res_arg));
-  grpc_resolver_next_locked(&exec_ctx, resolver, &on_res_arg.resolver_result,
+  grpc_resolver_next_locked(resolver, &on_res_arg.resolver_result,
                             on_resolution);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(gpr_event_wait(&on_res_arg.ev,
                             grpc_timeout_milliseconds_to_deadline(100)) ==
              nullptr);
 
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "test_fake_resolver");
-  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test_fake_resolver");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner, "test_fake_resolver");
+  GRPC_RESOLVER_UNREF(resolver, "test_fake_resolver");
+
   grpc_fake_resolver_response_generator_unref(response_generator);
 }
 
diff --git a/test/core/client_channel/resolvers/sockaddr_resolver_test.cc b/test/core/client_channel/resolvers/sockaddr_resolver_test.cc
index dfa2d12b5e..4d16a77924 100644
--- a/test/core/client_channel/resolvers/sockaddr_resolver_test.cc
+++ b/test/core/client_channel/resolvers/sockaddr_resolver_test.cc
@@ -35,14 +35,14 @@ typedef struct on_resolution_arg {
   grpc_channel_args* resolver_result;
 } on_resolution_arg;
 
-void on_resolution_cb(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+void on_resolution_cb(void* arg, grpc_error* error) {
   on_resolution_arg* res = static_cast<on_resolution_arg*>(arg);
-  grpc_channel_args_destroy(exec_ctx, res->resolver_result);
+  grpc_channel_args_destroy(res->resolver_result);
 }
 
 static void test_succeeds(grpc_resolver_factory* factory, const char* string) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, string, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(string, 0);
   grpc_resolver_args args;
   grpc_resolver* resolver;
   gpr_log(GPR_DEBUG, "test: '%s' should be valid for '%s'", string,
@@ -51,7 +51,7 @@ static void test_succeeds(grpc_resolver_factory* factory, const char* string) {
   memset(&args, 0, sizeof(args));
   args.uri = uri;
   args.combiner = g_combiner;
-  resolver = grpc_resolver_factory_create_resolver(&exec_ctx, factory, &args);
+  resolver = grpc_resolver_factory_create_resolver(factory, &args);
   GPR_ASSERT(resolver != nullptr);
 
   on_resolution_arg on_res_arg;
@@ -60,16 +60,16 @@ static void test_succeeds(grpc_resolver_factory* factory, const char* string) {
   grpc_closure* on_resolution = GRPC_CLOSURE_CREATE(
       on_resolution_cb, &on_res_arg, grpc_schedule_on_exec_ctx);
 
-  grpc_resolver_next_locked(&exec_ctx, resolver, &on_res_arg.resolver_result,
+  grpc_resolver_next_locked(resolver, &on_res_arg.resolver_result,
                             on_resolution);
-  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test_succeeds");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_RESOLVER_UNREF(resolver, "test_succeeds");
+
   grpc_uri_destroy(uri);
 }
 
 static void test_fails(grpc_resolver_factory* factory, const char* string) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, string, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(string, 0);
   grpc_resolver_args args;
   grpc_resolver* resolver;
   gpr_log(GPR_DEBUG, "test: '%s' should be invalid for '%s'", string,
@@ -78,10 +78,9 @@ static void test_fails(grpc_resolver_factory* factory, const char* string) {
   memset(&args, 0, sizeof(args));
   args.uri = uri;
   args.combiner = g_combiner;
-  resolver = grpc_resolver_factory_create_resolver(&exec_ctx, factory, &args);
+  resolver = grpc_resolver_factory_create_resolver(factory, &args);
   GPR_ASSERT(resolver == nullptr);
   grpc_uri_destroy(uri);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char** argv) {
@@ -112,9 +111,8 @@ int main(int argc, char** argv) {
   grpc_resolver_factory_unref(ipv6);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GRPC_COMBINER_UNREF(&exec_ctx, g_combiner, "test");
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    GRPC_COMBINER_UNREF(g_combiner, "test");
   }
   grpc_shutdown();
 
diff --git a/test/core/client_channel/uri_fuzzer_test.cc b/test/core/client_channel/uri_fuzzer_test.cc
index ba31793ff3..ee38453166 100644
--- a/test/core/client_channel/uri_fuzzer_test.cc
+++ b/test/core/client_channel/uri_fuzzer_test.cc
@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/ext/filters/client_channel/uri_parser.h"
@@ -33,12 +34,18 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   memcpy(s, data, size);
   s[size] = 0;
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* x;
-  if ((x = grpc_uri_parse(&exec_ctx, s, 1))) {
-    grpc_uri_destroy(x);
+  grpc_init();
+
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_uri* x;
+    if ((x = grpc_uri_parse(s, 1))) {
+      grpc_uri_destroy(x);
+    }
+
+    gpr_free(s);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
-  gpr_free(s);
+
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/client_channel/uri_parser_test.cc b/test/core/client_channel/uri_parser_test.cc
index 30183f9f57..254bfddfb3 100644
--- a/test/core/client_channel/uri_parser_test.cc
+++ b/test/core/client_channel/uri_parser_test.cc
@@ -20,6 +20,7 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/log.h>
 
 #include "src/core/lib/iomgr/exec_ctx.h"
@@ -28,29 +29,28 @@
 static void test_succeeds(const char* uri_text, const char* scheme,
                           const char* authority, const char* path,
                           const char* query, const char* fragment) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(uri_text, 0);
   GPR_ASSERT(uri);
   GPR_ASSERT(0 == strcmp(scheme, uri->scheme));
   GPR_ASSERT(0 == strcmp(authority, uri->authority));
   GPR_ASSERT(0 == strcmp(path, uri->path));
   GPR_ASSERT(0 == strcmp(query, uri->query));
   GPR_ASSERT(0 == strcmp(fragment, uri->fragment));
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_uri_destroy(uri);
 }
 
 static void test_fails(const char* uri_text) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GPR_ASSERT(nullptr == grpc_uri_parse(&exec_ctx, uri_text, 0));
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GPR_ASSERT(nullptr == grpc_uri_parse(uri_text, 0));
 }
 
 static void test_query_parts() {
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     const char* uri_text = "http://foo/path?a&b=B&c=&#frag";
-    grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+    grpc_uri* uri = grpc_uri_parse(uri_text, 0);
     GPR_ASSERT(uri);
 
     GPR_ASSERT(0 == strcmp("http", uri->scheme));
@@ -77,14 +77,14 @@ static void test_query_parts() {
     GPR_ASSERT(nullptr == grpc_uri_get_query_arg(uri, ""));
 
     GPR_ASSERT(0 == strcmp("frag", uri->fragment));
-    grpc_exec_ctx_finish(&exec_ctx);
+
     grpc_uri_destroy(uri);
   }
   {
     /* test the current behavior of multiple query part values */
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     const char* uri_text = "http://auth/path?foo=bar=baz&foobar==";
-    grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+    grpc_uri* uri = grpc_uri_parse(uri_text, 0);
     GPR_ASSERT(uri);
 
     GPR_ASSERT(0 == strcmp("http", uri->scheme));
@@ -96,14 +96,13 @@ static void test_query_parts() {
     GPR_ASSERT(0 == strcmp("bar", grpc_uri_get_query_arg(uri, "foo")));
     GPR_ASSERT(0 == strcmp("", grpc_uri_get_query_arg(uri, "foobar")));
 
-    grpc_exec_ctx_finish(&exec_ctx);
     grpc_uri_destroy(uri);
   }
   {
     /* empty query */
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     const char* uri_text = "http://foo/path";
-    grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+    grpc_uri* uri = grpc_uri_parse(uri_text, 0);
     GPR_ASSERT(uri);
 
     GPR_ASSERT(0 == strcmp("http", uri->scheme));
@@ -114,13 +113,14 @@ static void test_query_parts() {
     GPR_ASSERT(nullptr == uri->query_parts);
     GPR_ASSERT(nullptr == uri->query_parts_values);
     GPR_ASSERT(0 == strcmp("", uri->fragment));
-    grpc_exec_ctx_finish(&exec_ctx);
+
     grpc_uri_destroy(uri);
   }
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_succeeds("http://www.google.com", "http", "www.google.com", "", "", "");
   test_succeeds("dns:///foo", "dns", "", "/foo", "", "");
   test_succeeds("http://www.google.com:90", "http", "www.google.com:90", "", "",
@@ -148,5 +148,6 @@ int main(int argc, char** argv) {
   test_fails("http://foo?bar#lol#");
 
   test_query_parts();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/compression/algorithm_test.cc b/test/core/compression/algorithm_test.cc
index 2f1d8bc8eb..9e811e9af1 100644
--- a/test/core/compression/algorithm_test.cc
+++ b/test/core/compression/algorithm_test.cc
@@ -39,7 +39,7 @@ static void test_algorithm_mesh(void) {
     grpc_compression_algorithm parsed;
     grpc_slice mdstr;
     grpc_mdelem mdelem;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     GPR_ASSERT(
         grpc_compression_algorithm_name((grpc_compression_algorithm)i, &name));
     GPR_ASSERT(grpc_compression_algorithm_parse(
@@ -51,9 +51,8 @@ static void test_algorithm_mesh(void) {
     mdelem = grpc_compression_encoding_mdelem(parsed);
     GPR_ASSERT(grpc_slice_eq(GRPC_MDVALUE(mdelem), mdstr));
     GPR_ASSERT(grpc_slice_eq(GRPC_MDKEY(mdelem), GRPC_MDSTR_GRPC_ENCODING));
-    grpc_slice_unref_internal(&exec_ctx, mdstr);
-    GRPC_MDELEM_UNREF(&exec_ctx, mdelem);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_slice_unref_internal(mdstr);
+    GRPC_MDELEM_UNREF(mdelem);
   }
 
   /* test failure */
@@ -62,7 +61,7 @@ static void test_algorithm_mesh(void) {
 }
 
 static void test_algorithm_failure(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_slice mdstr;
 
   gpr_log(GPR_DEBUG, "test_algorithm_failure");
@@ -83,8 +82,7 @@ static void test_algorithm_failure(void) {
       grpc_compression_algorithm_slice(static_cast<grpc_compression_algorithm>(
           static_cast<int>(GRPC_COMPRESS_ALGORITHMS_COUNT) + 1)),
       grpc_empty_slice()));
-  grpc_slice_unref_internal(&exec_ctx, mdstr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_unref_internal(mdstr);
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/compression/message_compress_test.cc b/test/core/compression/message_compress_test.cc
index 676415ba9d..6ca07b70c4 100644
--- a/test/core/compression/message_compress_test.cc
+++ b/test/core/compression/message_compress_test.cc
@@ -70,10 +70,8 @@ static void assert_passthrough(grpc_slice value,
   grpc_split_slices_to_buffer(uncompressed_split_mode, &value, 1, &input);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    was_compressed =
-        grpc_msg_compress(&exec_ctx, algorithm, &input, &compressed_raw);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    was_compressed = grpc_msg_compress(algorithm, &input, &compressed_raw);
   }
   GPR_ASSERT(input.count > 0);
 
@@ -92,11 +90,9 @@ static void assert_passthrough(grpc_slice value,
   grpc_split_slice_buffer(compressed_split_mode, &compressed_raw, &compressed);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     GPR_ASSERT(grpc_msg_decompress(
-        &exec_ctx, was_compressed ? algorithm : GRPC_COMPRESS_NONE, &compressed,
-        &output));
-    grpc_exec_ctx_finish(&exec_ctx);
+        was_compressed ? algorithm : GRPC_COMPRESS_NONE, &compressed, &output));
   }
 
   final = grpc_slice_merge(output.slices, output.count);
@@ -156,11 +152,11 @@ static void test_tiny_data_compress(void) {
 
   for (int i = 0; i < GRPC_COMPRESS_ALGORITHMS_COUNT; i++) {
     if (i == GRPC_COMPRESS_NONE) continue;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GPR_ASSERT(0 == grpc_msg_compress(
-                        &exec_ctx, static_cast<grpc_compression_algorithm>(i),
-                        &input, &output));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    GPR_ASSERT(0 ==
+               grpc_msg_compress(static_cast<grpc_compression_algorithm>(i),
+                                 &input, &output));
+
     GPR_ASSERT(1 == output.count);
   }
 
@@ -180,9 +176,9 @@ static void test_bad_decompression_data_crc(void) {
   grpc_slice_buffer_init(&output);
   grpc_slice_buffer_add(&input, create_test_value(ONE_MB_A));
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   /* compress it */
-  grpc_msg_compress(&exec_ctx, GRPC_COMPRESS_GZIP, &input, &corrupted);
+  grpc_msg_compress(GRPC_COMPRESS_GZIP, &input, &corrupted);
   /* corrupt the output by smashing the CRC */
   GPR_ASSERT(corrupted.count > 1);
   GPR_ASSERT(GRPC_SLICE_LENGTH(corrupted.slices[1]) > 8);
@@ -190,9 +186,7 @@ static void test_bad_decompression_data_crc(void) {
   memcpy(GRPC_SLICE_START_PTR(corrupted.slices[1]) + idx, &bad, 4);
 
   /* try (and fail) to decompress the corrupted compresed buffer */
-  GPR_ASSERT(0 == grpc_msg_decompress(&exec_ctx, GRPC_COMPRESS_GZIP, &corrupted,
-                                      &output));
-  grpc_exec_ctx_finish(&exec_ctx);
+  GPR_ASSERT(0 == grpc_msg_decompress(GRPC_COMPRESS_GZIP, &corrupted, &output));
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&corrupted);
@@ -211,10 +205,8 @@ static void test_bad_decompression_data_trailing_garbage(void) {
                   "\x78\xda\x63\x60\x60\x60\x00\x00\x00\x04\x00\x01\x99", 13));
 
   /* try (and fail) to decompress the invalid compresed buffer */
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GPR_ASSERT(0 == grpc_msg_decompress(&exec_ctx, GRPC_COMPRESS_DEFLATE, &input,
-                                      &output));
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GPR_ASSERT(0 == grpc_msg_decompress(GRPC_COMPRESS_DEFLATE, &input, &output));
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&output);
@@ -230,10 +222,8 @@ static void test_bad_decompression_data_stream(void) {
                         grpc_slice_from_copied_buffer("\x78\xda\xff\xff", 4));
 
   /* try (and fail) to decompress the invalid compresed buffer */
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GPR_ASSERT(0 == grpc_msg_decompress(&exec_ctx, GRPC_COMPRESS_DEFLATE, &input,
-                                      &output));
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GPR_ASSERT(0 == grpc_msg_decompress(GRPC_COMPRESS_DEFLATE, &input, &output));
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&output);
@@ -249,17 +239,15 @@ static void test_bad_compression_algorithm(void) {
   grpc_slice_buffer_add(
       &input, grpc_slice_from_copied_string("Never gonna give you up"));
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  was_compressed = grpc_msg_compress(&exec_ctx, GRPC_COMPRESS_ALGORITHMS_COUNT,
-                                     &input, &output);
+  grpc_core::ExecCtx exec_ctx;
+  was_compressed =
+      grpc_msg_compress(GRPC_COMPRESS_ALGORITHMS_COUNT, &input, &output);
   GPR_ASSERT(0 == was_compressed);
 
-  was_compressed = grpc_msg_compress(&exec_ctx,
-                                     static_cast<grpc_compression_algorithm>(
+  was_compressed = grpc_msg_compress(static_cast<grpc_compression_algorithm>(
                                          GRPC_COMPRESS_ALGORITHMS_COUNT + 123),
                                      &input, &output);
   GPR_ASSERT(0 == was_compressed);
-  grpc_exec_ctx_finish(&exec_ctx);
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&output);
@@ -275,18 +263,16 @@ static void test_bad_decompression_algorithm(void) {
   grpc_slice_buffer_add(&input,
                         grpc_slice_from_copied_string(
                             "I'm not really compressed but it doesn't matter"));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  was_decompressed = grpc_msg_decompress(
-      &exec_ctx, GRPC_COMPRESS_ALGORITHMS_COUNT, &input, &output);
+  grpc_core::ExecCtx exec_ctx;
+  was_decompressed =
+      grpc_msg_decompress(GRPC_COMPRESS_ALGORITHMS_COUNT, &input, &output);
   GPR_ASSERT(0 == was_decompressed);
 
   was_decompressed =
-      grpc_msg_decompress(&exec_ctx,
-                          static_cast<grpc_compression_algorithm>(
+      grpc_msg_decompress(static_cast<grpc_compression_algorithm>(
                               GRPC_COMPRESS_ALGORITHMS_COUNT + 123),
                           &input, &output);
   GPR_ASSERT(0 == was_decompressed);
-  grpc_exec_ctx_finish(&exec_ctx);
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&output);
diff --git a/test/core/debug/stats_test.cc b/test/core/debug/stats_test.cc
index 5fae61f8f6..e60e54b2fd 100644
--- a/test/core/debug/stats_test.cc
+++ b/test/core/debug/stats_test.cc
@@ -49,9 +49,8 @@ TEST(StatsTest, IncCounters) {
   for (int i = 0; i < GRPC_STATS_COUNTER_COUNT; i++) {
     Snapshot snapshot;
 
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GRPC_STATS_INC_COUNTER(&exec_ctx, (grpc_stats_counters)i);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    GRPC_STATS_INC_COUNTER((grpc_stats_counters)i);
 
     EXPECT_EQ(snapshot.delta().counters[i], 1);
   }
@@ -60,9 +59,8 @@ TEST(StatsTest, IncCounters) {
 TEST(StatsTest, IncSpecificCounter) {
   Snapshot snapshot;
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_STATS_INC_SYSCALL_POLL(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_STATS_INC_SYSCALL_POLL();
 
   EXPECT_EQ(snapshot.delta().counters[GRPC_STATS_COUNTER_SYSCALL_POLL], 1);
 }
@@ -94,9 +92,8 @@ TEST_P(HistogramTest, IncHistogram) {
     for (auto j : test_values) {
       Snapshot snapshot;
 
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-      grpc_stats_inc_histogram[kHistogram](&exec_ctx, j);
-      grpc_exec_ctx_finish(&exec_ctx);
+      grpc_core::ExecCtx exec_ctx;
+      grpc_stats_inc_histogram[kHistogram](j);
 
       auto delta = snapshot.delta();
 
diff --git a/test/core/end2end/bad_server_response_test.cc b/test/core/end2end/bad_server_response_test.cc
index b0c6ae926e..93809ac37a 100644
--- a/test/core/end2end/bad_server_response_test.cc
+++ b/test/core/end2end/bad_server_response_test.cc
@@ -91,22 +91,22 @@ static grpc_closure on_write;
 
 static void* tag(intptr_t t) { return (void*)t; }
 
-static void done_write(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void done_write(void* arg, grpc_error* error) {
   GPR_ASSERT(error == GRPC_ERROR_NONE);
 
   gpr_atm_rel_store(&state.done_atm, 1);
 }
 
-static void handle_write(grpc_exec_ctx* exec_ctx) {
+static void handle_write() {
   grpc_slice slice = grpc_slice_from_copied_buffer(
       state.response_payload, state.response_payload_length);
 
   grpc_slice_buffer_reset_and_unref(&state.outgoing_buffer);
   grpc_slice_buffer_add(&state.outgoing_buffer, slice);
-  grpc_endpoint_write(exec_ctx, state.tcp, &state.outgoing_buffer, &on_write);
+  grpc_endpoint_write(state.tcp, &state.outgoing_buffer, &on_write);
 }
 
-static void handle_read(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void handle_read(void* arg, grpc_error* error) {
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   state.incoming_data_length += state.temp_incoming_buffer.length;
 
@@ -123,14 +123,13 @@ static void handle_read(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
           SERVER_INCOMING_DATA_LENGTH_LOWER_THRESHOLD);
   if (state.incoming_data_length >=
       SERVER_INCOMING_DATA_LENGTH_LOWER_THRESHOLD) {
-    handle_write(exec_ctx);
+    handle_write();
   } else {
-    grpc_endpoint_read(exec_ctx, state.tcp, &state.temp_incoming_buffer,
-                       &on_read);
+    grpc_endpoint_read(state.tcp, &state.temp_incoming_buffer, &on_read);
   }
 }
 
-static void on_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
+static void on_connect(void* arg, grpc_endpoint* tcp,
                        grpc_pollset* accepting_pollset,
                        grpc_tcp_server_acceptor* acceptor) {
   gpr_free(acceptor);
@@ -141,8 +140,8 @@ static void on_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
   grpc_slice_buffer_init(&state.outgoing_buffer);
   state.tcp = tcp;
   state.incoming_data_length = 0;
-  grpc_endpoint_add_to_pollset(exec_ctx, tcp, server->pollset);
-  grpc_endpoint_read(exec_ctx, tcp, &state.temp_incoming_buffer, &on_read);
+  grpc_endpoint_add_to_pollset(tcp, server->pollset);
+  grpc_endpoint_read(tcp, &state.temp_incoming_buffer, &on_read);
 }
 
 static gpr_timespec n_sec_deadline(int seconds) {
@@ -217,10 +216,10 @@ static void start_rpc(int target_port, grpc_status_code expected_status,
   cq_verifier_destroy(cqv);
 }
 
-static void cleanup_rpc(grpc_exec_ctx* exec_ctx) {
+static void cleanup_rpc() {
   grpc_event ev;
-  grpc_slice_buffer_destroy_internal(exec_ctx, &state.temp_incoming_buffer);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &state.outgoing_buffer);
+  grpc_slice_buffer_destroy_internal(&state.temp_incoming_buffer);
+  grpc_slice_buffer_destroy_internal(&state.outgoing_buffer);
   grpc_call_unref(state.call);
   grpc_completion_queue_shutdown(state.cq);
   do {
@@ -262,7 +261,7 @@ static void poll_server_until_read_done(test_tcp_server* server,
   poll_args* pa = (poll_args*)gpr_malloc(sizeof(*pa));
   pa->server = server;
   pa->signal_when_done = signal_when_done;
-  gpr_thd_new(&id, actually_poll_server, pa, nullptr);
+  gpr_thd_new(&id, "grpc_poll_server", actually_poll_server, pa, nullptr);
 }
 
 static void run_test(const char* response_payload,
@@ -270,7 +269,7 @@ static void run_test(const char* response_payload,
                      grpc_status_code expected_status,
                      const char* expected_detail) {
   test_tcp_server test_server;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_event ev;
 
   grpc_init();
@@ -287,11 +286,11 @@ static void run_test(const char* response_payload,
   gpr_event_wait(&ev, gpr_inf_future(GPR_CLOCK_REALTIME));
 
   /* clean up */
-  grpc_endpoint_shutdown(&exec_ctx, state.tcp,
+  grpc_endpoint_shutdown(state.tcp,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
-  grpc_endpoint_destroy(&exec_ctx, state.tcp);
-  cleanup_rpc(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_endpoint_destroy(state.tcp);
+  cleanup_rpc();
+  grpc_core::ExecCtx::Get()->Flush();
   test_tcp_server_destroy(&test_server);
 
   grpc_shutdown();
@@ -299,6 +298,7 @@ static void run_test(const char* response_payload,
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   /* status defined in hpack static table */
   run_test(HTTP2_RESP(204), sizeof(HTTP2_RESP(204)) - 1, GRPC_STATUS_CANCELLED,
@@ -337,5 +337,6 @@ int main(int argc, char** argv) {
   run_test(HTTP1_RESP, sizeof(HTTP1_RESP) - 1, GRPC_STATUS_UNAVAILABLE,
            HTTP1_DETAIL_MSG);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/end2end/connection_refused_test.cc b/test/core/end2end/connection_refused_test.cc
index f3f2dda91d..ca6d17e7c8 100644
--- a/test/core/end2end/connection_refused_test.cc
+++ b/test/core/end2end/connection_refused_test.cc
@@ -133,9 +133,8 @@ static void run_test(bool wait_for_ready, bool use_service_config) {
   grpc_metadata_array_destroy(&trailing_metadata_recv);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    if (args != nullptr) grpc_channel_args_destroy(&exec_ctx, args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    if (args != nullptr) grpc_channel_args_destroy(args);
   }
 
   grpc_shutdown();
diff --git a/test/core/end2end/dualstack_socket_test.cc b/test/core/end2end/dualstack_socket_test.cc
index ad2b24fdb0..2ba1c17c2c 100644
--- a/test/core/end2end/dualstack_socket_test.cc
+++ b/test/core/end2end/dualstack_socket_test.cc
@@ -29,7 +29,9 @@
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
+#include "src/core/lib/iomgr/error.h"
 #include "src/core/lib/iomgr/resolve_address.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "src/core/lib/iomgr/socket_utils_posix.h"
 #include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
@@ -54,6 +56,21 @@ static void drain_cq(grpc_completion_queue* cq) {
 
 static void do_nothing(void* ignored) {}
 
+static void log_resolved_addrs(const char* label, const char* hostname) {
+  grpc_resolved_addresses* res = nullptr;
+  grpc_error* error = grpc_blocking_resolve_address(hostname, "80", &res);
+  if (error != GRPC_ERROR_NONE || res == nullptr) {
+    GRPC_LOG_IF_ERROR(hostname, error);
+    return;
+  }
+  for (size_t i = 0; i < res->naddrs; ++i) {
+    char* addr_str = grpc_sockaddr_to_uri(&res->addrs[i]);
+    gpr_log(GPR_INFO, "%s: %s", label, addr_str);
+    gpr_free(addr_str);
+  }
+  grpc_resolved_addresses_destroy(res);
+}
+
 void test_connect(const char* server_host, const char* client_host, int port,
                   int expect_ok) {
   char* client_hostport;
@@ -140,6 +157,8 @@ void test_connect(const char* server_host, const char* client_host, int port,
 
   gpr_log(GPR_INFO, "Testing with server=%s client=%s (expecting %s)",
           server_hostport, client_hostport, expect_ok ? "success" : "failure");
+  log_resolved_addrs("server resolved addr", server_host);
+  log_resolved_addrs("client resolved addr", client_host);
 
   gpr_free(client_hostport);
   gpr_free(server_hostport);
@@ -236,6 +255,8 @@ void test_connect(const char* server_host, const char* client_host, int port,
     CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
     cq_verify(cqv);
 
+    gpr_log(GPR_INFO, "status: %d (expected: %d)", status,
+            GRPC_STATUS_UNAVAILABLE);
     GPR_ASSERT(status == GRPC_STATUS_UNAVAILABLE);
   }
 
diff --git a/test/core/end2end/fixtures/h2_census.cc b/test/core/end2end/fixtures/h2_census.cc
index fed8ead5c8..75c80aa1ff 100644
--- a/test/core/end2end/fixtures/h2_census.cc
+++ b/test/core/end2end/fixtures/h2_census.cc
@@ -75,9 +75,8 @@ void chttp2_init_client_fullstack(grpc_end2end_test_fixture* f,
       grpc_insecure_channel_create(ffd->localaddr, client_args, nullptr);
   GPR_ASSERT(f->client);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
   }
 }
 
@@ -92,9 +91,8 @@ void chttp2_init_server_fullstack(grpc_end2end_test_fixture* f,
   server_args = grpc_channel_args_copy_and_add(server_args, &arg, 1);
   f->server = grpc_server_create(server_args, nullptr);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(server_args);
   }
   grpc_server_register_completion_queue(f->server, f->cq, nullptr);
   GPR_ASSERT(grpc_server_add_insecure_http2_port(f->server, ffd->localaddr));
diff --git a/test/core/end2end/fixtures/h2_compress.cc b/test/core/end2end/fixtures/h2_compress.cc
index ea8990fd0a..5b9181586c 100644
--- a/test/core/end2end/fixtures/h2_compress.cc
+++ b/test/core/end2end/fixtures/h2_compress.cc
@@ -66,9 +66,8 @@ void chttp2_init_client_fullstack_compression(grpc_end2end_test_fixture* f,
   fullstack_compression_fixture_data* ffd =
       static_cast<fullstack_compression_fixture_data*>(f->fixture_data);
   if (ffd->client_args_compression != nullptr) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, ffd->client_args_compression);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(ffd->client_args_compression);
   }
   ffd->client_args_compression = grpc_channel_args_set_compression_algorithm(
       client_args, GRPC_COMPRESS_GZIP);
@@ -81,9 +80,8 @@ void chttp2_init_server_fullstack_compression(grpc_end2end_test_fixture* f,
   fullstack_compression_fixture_data* ffd =
       static_cast<fullstack_compression_fixture_data*>(f->fixture_data);
   if (ffd->server_args_compression != nullptr) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, ffd->server_args_compression);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(ffd->server_args_compression);
   }
   ffd->server_args_compression = grpc_channel_args_set_compression_algorithm(
       server_args, GRPC_COMPRESS_GZIP);
@@ -97,14 +95,13 @@ void chttp2_init_server_fullstack_compression(grpc_end2end_test_fixture* f,
 }
 
 void chttp2_tear_down_fullstack_compression(grpc_end2end_test_fixture* f) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   fullstack_compression_fixture_data* ffd =
       static_cast<fullstack_compression_fixture_data*>(f->fixture_data);
-  grpc_channel_args_destroy(&exec_ctx, ffd->client_args_compression);
-  grpc_channel_args_destroy(&exec_ctx, ffd->server_args_compression);
+  grpc_channel_args_destroy(ffd->client_args_compression);
+  grpc_channel_args_destroy(ffd->server_args_compression);
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 /* All test configurations */
diff --git a/test/core/end2end/fixtures/h2_fd.cc b/test/core/end2end/fixtures/h2_fd.cc
index 97f4b71bf0..9157ab04d0 100644
--- a/test/core/end2end/fixtures/h2_fd.cc
+++ b/test/core/end2end/fixtures/h2_fd.cc
@@ -68,20 +68,18 @@ static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
 
 static void chttp2_init_client_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* client_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   sp_fixture_data* sfd = static_cast<sp_fixture_data*>(f->fixture_data);
 
   GPR_ASSERT(!f->client);
   f->client = grpc_insecure_channel_create_from_fd(
       "fixture_client", sfd->fd_pair[0], client_args);
   GPR_ASSERT(f->client);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void chttp2_init_server_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* server_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   sp_fixture_data* sfd = static_cast<sp_fixture_data*>(f->fixture_data);
   GPR_ASSERT(!f->server);
   f->server = grpc_server_create(server_args, nullptr);
@@ -90,8 +88,6 @@ static void chttp2_init_server_socketpair(grpc_end2end_test_fixture* f,
   grpc_server_start(f->server);
 
   grpc_server_add_insecure_channel_from_fd(f->server, nullptr, sfd->fd_pair[1]);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void chttp2_tear_down_socketpair(grpc_end2end_test_fixture* f) {
diff --git a/test/core/end2end/fixtures/h2_full+workarounds.cc b/test/core/end2end/fixtures/h2_full+workarounds.cc
index 71a497d796..237841d185 100644
--- a/test/core/end2end/fixtures/h2_full+workarounds.cc
+++ b/test/core/end2end/fixtures/h2_full+workarounds.cc
@@ -72,7 +72,7 @@ void chttp2_init_client_fullstack(grpc_end2end_test_fixture* f,
 void chttp2_init_server_fullstack(grpc_end2end_test_fixture* f,
                                   grpc_channel_args* server_args) {
   int i;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   fullstack_fixture_data* ffd =
       static_cast<fullstack_fixture_data*>(f->fixture_data);
   grpc_arg args[GRPC_MAX_WORKAROUND_ID];
@@ -90,8 +90,7 @@ void chttp2_init_server_fullstack(grpc_end2end_test_fixture* f,
   grpc_server_register_completion_queue(f->server, f->cq, nullptr);
   GPR_ASSERT(grpc_server_add_insecure_http2_port(f->server, ffd->localaddr));
   grpc_server_start(f->server);
-  grpc_channel_args_destroy(&exec_ctx, server_args_new);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_args_destroy(server_args_new);
 }
 
 void chttp2_tear_down_fullstack(grpc_end2end_test_fixture* f) {
diff --git a/test/core/end2end/fixtures/h2_load_reporting.cc b/test/core/end2end/fixtures/h2_load_reporting.cc
index 7486b6af78..fda5f4b052 100644
--- a/test/core/end2end/fixtures/h2_load_reporting.cc
+++ b/test/core/end2end/fixtures/h2_load_reporting.cc
@@ -78,9 +78,8 @@ void chttp2_init_server_load_reporting(grpc_end2end_test_fixture* f,
   server_args = grpc_channel_args_copy_and_add(server_args, &arg, 1);
   f->server = grpc_server_create(server_args, nullptr);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(server_args);
   }
   grpc_server_register_completion_queue(f->server, f->cq, nullptr);
   GPR_ASSERT(grpc_server_add_insecure_http2_port(f->server, ffd->localaddr));
diff --git a/test/core/end2end/fixtures/h2_oauth2.cc b/test/core/end2end/fixtures/h2_oauth2.cc
index 1642cb0db9..5fed4434de 100644
--- a/test/core/end2end/fixtures/h2_oauth2.cc
+++ b/test/core/end2end/fixtures/h2_oauth2.cc
@@ -143,11 +143,11 @@ void chttp2_tear_down_secure_fullstack(grpc_end2end_test_fixture* f) {
 
 static void chttp2_init_client_simple_ssl_with_oauth2_secure_fullstack(
     grpc_end2end_test_fixture* f, grpc_channel_args* client_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_credentials* ssl_creds =
       grpc_ssl_credentials_create(test_root_cert, nullptr, nullptr);
   grpc_call_credentials* oauth2_creds = grpc_md_only_test_credentials_create(
-      &exec_ctx, "authorization", oauth2_md, true /* is_async */);
+      "authorization", oauth2_md, true /* is_async */);
   grpc_channel_credentials* ssl_oauth2_creds =
       grpc_composite_channel_credentials_create(ssl_creds, oauth2_creds,
                                                 nullptr);
@@ -158,10 +158,9 @@ static void chttp2_init_client_simple_ssl_with_oauth2_secure_fullstack(
   grpc_channel_args* new_client_args =
       grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_oauth2_creds);
-  grpc_channel_args_destroy(&exec_ctx, new_client_args);
+  grpc_channel_args_destroy(new_client_args);
   grpc_channel_credentials_release(ssl_creds);
   grpc_call_credentials_release(oauth2_creds);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static int fail_server_auth_check(grpc_channel_args* server_args) {
diff --git a/test/core/end2end/fixtures/h2_sockpair+trace.cc b/test/core/end2end/fixtures/h2_sockpair+trace.cc
index 9319c401dc..9807e929af 100644
--- a/test/core/end2end/fixtures/h2_sockpair+trace.cc
+++ b/test/core/end2end/fixtures/h2_sockpair+trace.cc
@@ -50,12 +50,11 @@
 
 static void server_setup_transport(void* ts, grpc_transport* transport) {
   grpc_end2end_test_fixture* f = static_cast<grpc_end2end_test_fixture*>(ts);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
-  grpc_endpoint_add_to_pollset(&exec_ctx, sfd->server, grpc_cq_pollset(f->cq));
-  grpc_server_setup_transport(&exec_ctx, f->server, transport, nullptr,
+  grpc_endpoint_add_to_pollset(sfd->server, grpc_cq_pollset(f->cq));
+  grpc_server_setup_transport(f->server, transport, nullptr,
                               grpc_server_get_channel_args(f->server));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 typedef struct {
@@ -63,13 +62,11 @@ typedef struct {
   grpc_channel_args* client_args;
 } sp_client_setup;
 
-static void client_setup_transport(grpc_exec_ctx* exec_ctx, void* ts,
-                                   grpc_transport* transport) {
+static void client_setup_transport(void* ts, grpc_transport* transport) {
   sp_client_setup* cs = static_cast<sp_client_setup*>(ts);
 
-  cs->f->client =
-      grpc_channel_create(exec_ctx, "socketpair-target", cs->client_args,
-                          GRPC_CLIENT_DIRECT_CHANNEL, transport);
+  cs->f->client = grpc_channel_create("socketpair-target", cs->client_args,
+                                      GRPC_CLIENT_DIRECT_CHANNEL, transport);
 }
 
 static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
@@ -90,34 +87,30 @@ static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
 
 static void chttp2_init_client_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* client_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
   grpc_transport* transport;
   sp_client_setup cs;
   cs.client_args = client_args;
   cs.f = f;
-  transport =
-      grpc_create_chttp2_transport(&exec_ctx, client_args, sfd->client, true);
-  client_setup_transport(&exec_ctx, &cs, transport);
+  transport = grpc_create_chttp2_transport(client_args, sfd->client, true);
+  client_setup_transport(&cs, transport);
   GPR_ASSERT(f->client);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 static void chttp2_init_server_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* server_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
   grpc_transport* transport;
   GPR_ASSERT(!f->server);
   f->server = grpc_server_create(server_args, nullptr);
   grpc_server_register_completion_queue(f->server, f->cq, nullptr);
   grpc_server_start(f->server);
-  transport =
-      grpc_create_chttp2_transport(&exec_ctx, server_args, sfd->server, false);
+  transport = grpc_create_chttp2_transport(server_args, sfd->server, false);
   server_setup_transport(f, transport);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 static void chttp2_tear_down_socketpair(grpc_end2end_test_fixture* f) {
@@ -133,7 +126,6 @@ static grpc_end2end_test_config configs[] = {
 
 int main(int argc, char** argv) {
   size_t i;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   /* force tracing on, with a value to force many
      code paths in trace.c to be taken */
@@ -147,7 +139,6 @@ int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   grpc_end2end_tests_pre_init();
   grpc_init();
-  grpc_exec_ctx_finish(&exec_ctx);
 
   GPR_ASSERT(0 == grpc_tracer_set_enabled("also-doesnt-exist", 0));
   GPR_ASSERT(1 == grpc_tracer_set_enabled("http", 1));
diff --git a/test/core/end2end/fixtures/h2_sockpair.cc b/test/core/end2end/fixtures/h2_sockpair.cc
index 03566aada2..b68279fd71 100644
--- a/test/core/end2end/fixtures/h2_sockpair.cc
+++ b/test/core/end2end/fixtures/h2_sockpair.cc
@@ -44,12 +44,11 @@
 
 static void server_setup_transport(void* ts, grpc_transport* transport) {
   grpc_end2end_test_fixture* f = static_cast<grpc_end2end_test_fixture*>(ts);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
-  grpc_endpoint_add_to_pollset(&exec_ctx, sfd->server, grpc_cq_pollset(f->cq));
-  grpc_server_setup_transport(&exec_ctx, f->server, transport, nullptr,
+  grpc_endpoint_add_to_pollset(sfd->server, grpc_cq_pollset(f->cq));
+  grpc_server_setup_transport(f->server, transport, nullptr,
                               grpc_server_get_channel_args(f->server));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 typedef struct {
@@ -57,13 +56,11 @@ typedef struct {
   grpc_channel_args* client_args;
 } sp_client_setup;
 
-static void client_setup_transport(grpc_exec_ctx* exec_ctx, void* ts,
-                                   grpc_transport* transport) {
+static void client_setup_transport(void* ts, grpc_transport* transport) {
   sp_client_setup* cs = static_cast<sp_client_setup*>(ts);
 
-  cs->f->client =
-      grpc_channel_create(exec_ctx, "socketpair-target", cs->client_args,
-                          GRPC_CLIENT_DIRECT_CHANNEL, transport);
+  cs->f->client = grpc_channel_create("socketpair-target", cs->client_args,
+                                      GRPC_CLIENT_DIRECT_CHANNEL, transport);
 }
 
 static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
@@ -84,34 +81,30 @@ static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
 
 static void chttp2_init_client_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* client_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
   grpc_transport* transport;
   sp_client_setup cs;
   cs.client_args = client_args;
   cs.f = f;
-  transport =
-      grpc_create_chttp2_transport(&exec_ctx, client_args, sfd->client, true);
-  client_setup_transport(&exec_ctx, &cs, transport);
+  transport = grpc_create_chttp2_transport(client_args, sfd->client, true);
+  client_setup_transport(&cs, transport);
   GPR_ASSERT(f->client);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 static void chttp2_init_server_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* server_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
   grpc_transport* transport;
   GPR_ASSERT(!f->server);
   f->server = grpc_server_create(server_args, nullptr);
   grpc_server_register_completion_queue(f->server, f->cq, nullptr);
   grpc_server_start(f->server);
-  transport =
-      grpc_create_chttp2_transport(&exec_ctx, server_args, sfd->server, false);
+  transport = grpc_create_chttp2_transport(server_args, sfd->server, false);
   server_setup_transport(f, transport);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 static void chttp2_tear_down_socketpair(grpc_end2end_test_fixture* f) {
diff --git a/test/core/end2end/fixtures/h2_sockpair_1byte.cc b/test/core/end2end/fixtures/h2_sockpair_1byte.cc
index 9adba00204..350be138ca 100644
--- a/test/core/end2end/fixtures/h2_sockpair_1byte.cc
+++ b/test/core/end2end/fixtures/h2_sockpair_1byte.cc
@@ -44,12 +44,11 @@
 
 static void server_setup_transport(void* ts, grpc_transport* transport) {
   grpc_end2end_test_fixture* f = static_cast<grpc_end2end_test_fixture*>(ts);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
-  grpc_endpoint_add_to_pollset(&exec_ctx, sfd->server, grpc_cq_pollset(f->cq));
-  grpc_server_setup_transport(&exec_ctx, f->server, transport, nullptr,
+  grpc_endpoint_add_to_pollset(sfd->server, grpc_cq_pollset(f->cq));
+  grpc_server_setup_transport(f->server, transport, nullptr,
                               grpc_server_get_channel_args(f->server));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 typedef struct {
@@ -57,13 +56,11 @@ typedef struct {
   grpc_channel_args* client_args;
 } sp_client_setup;
 
-static void client_setup_transport(grpc_exec_ctx* exec_ctx, void* ts,
-                                   grpc_transport* transport) {
+static void client_setup_transport(void* ts, grpc_transport* transport) {
   sp_client_setup* cs = static_cast<sp_client_setup*>(ts);
 
-  cs->f->client =
-      grpc_channel_create(exec_ctx, "socketpair-target", cs->client_args,
-                          GRPC_CLIENT_DIRECT_CHANNEL, transport);
+  cs->f->client = grpc_channel_create("socketpair-target", cs->client_args,
+                                      GRPC_CLIENT_DIRECT_CHANNEL, transport);
 }
 
 static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
@@ -95,34 +92,30 @@ static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
 
 static void chttp2_init_client_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* client_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
   grpc_transport* transport;
   sp_client_setup cs;
   cs.client_args = client_args;
   cs.f = f;
-  transport =
-      grpc_create_chttp2_transport(&exec_ctx, client_args, sfd->client, true);
-  client_setup_transport(&exec_ctx, &cs, transport);
+  transport = grpc_create_chttp2_transport(client_args, sfd->client, true);
+  client_setup_transport(&cs, transport);
   GPR_ASSERT(f->client);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 static void chttp2_init_server_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* server_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
   grpc_transport* transport;
   GPR_ASSERT(!f->server);
   f->server = grpc_server_create(server_args, nullptr);
   grpc_server_register_completion_queue(f->server, f->cq, nullptr);
   grpc_server_start(f->server);
-  transport =
-      grpc_create_chttp2_transport(&exec_ctx, server_args, sfd->server, false);
+  transport = grpc_create_chttp2_transport(server_args, sfd->server, false);
   server_setup_transport(f, transport);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 static void chttp2_tear_down_socketpair(grpc_end2end_test_fixture* f) {
diff --git a/test/core/end2end/fixtures/h2_ssl.cc b/test/core/end2end/fixtures/h2_ssl.cc
index 3d7e2e327e..9a0680c40e 100644
--- a/test/core/end2end/fixtures/h2_ssl.cc
+++ b/test/core/end2end/fixtures/h2_ssl.cc
@@ -110,9 +110,8 @@ static void chttp2_init_client_simple_ssl_secure_fullstack(
       grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_creds);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, new_client_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(new_client_args);
   }
 }
 
diff --git a/test/core/end2end/fixtures/h2_ssl_proxy.cc b/test/core/end2end/fixtures/h2_ssl_proxy.cc
index f8d5a699e4..5ddbdefc8c 100644
--- a/test/core/end2end/fixtures/h2_ssl_proxy.cc
+++ b/test/core/end2end/fixtures/h2_ssl_proxy.cc
@@ -66,9 +66,8 @@ static grpc_channel* create_proxy_client(const char* target,
       grpc_secure_channel_create(ssl_creds, target, new_client_args, nullptr);
   grpc_channel_credentials_release(ssl_creds);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, new_client_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(new_client_args);
   }
   return channel;
 }
@@ -148,9 +147,8 @@ static void chttp2_init_client_simple_ssl_secure_fullstack(
       grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_creds);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, new_client_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(new_client_args);
   }
 }
 
diff --git a/test/core/end2end/fixtures/http_proxy_fixture.cc b/test/core/end2end/fixtures/http_proxy_fixture.cc
index 0cec27bad7..137f7c9fa3 100644
--- a/test/core/end2end/fixtures/http_proxy_fixture.cc
+++ b/test/core/end2end/fixtures/http_proxy_fixture.cc
@@ -116,24 +116,21 @@ static void proxy_connection_ref(proxy_connection* conn, const char* reason) {
 }
 
 // Helper function to destroy the proxy connection.
-static void proxy_connection_unref(grpc_exec_ctx* exec_ctx,
-                                   proxy_connection* conn, const char* reason) {
+static void proxy_connection_unref(proxy_connection* conn, const char* reason) {
   if (gpr_unref(&conn->refcount)) {
     gpr_log(GPR_DEBUG, "endpoints: %p %p", conn->client_endpoint,
             conn->server_endpoint);
-    grpc_endpoint_destroy(exec_ctx, conn->client_endpoint);
+    grpc_endpoint_destroy(conn->client_endpoint);
     if (conn->server_endpoint != nullptr) {
-      grpc_endpoint_destroy(exec_ctx, conn->server_endpoint);
+      grpc_endpoint_destroy(conn->server_endpoint);
     }
-    grpc_pollset_set_destroy(exec_ctx, conn->pollset_set);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &conn->client_read_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx,
-                                       &conn->client_deferred_write_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &conn->client_write_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &conn->server_read_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx,
-                                       &conn->server_deferred_write_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &conn->server_write_buffer);
+    grpc_pollset_set_destroy(conn->pollset_set);
+    grpc_slice_buffer_destroy_internal(&conn->client_read_buffer);
+    grpc_slice_buffer_destroy_internal(&conn->client_deferred_write_buffer);
+    grpc_slice_buffer_destroy_internal(&conn->client_write_buffer);
+    grpc_slice_buffer_destroy_internal(&conn->server_read_buffer);
+    grpc_slice_buffer_destroy_internal(&conn->server_deferred_write_buffer);
+    grpc_slice_buffer_destroy_internal(&conn->server_write_buffer);
     grpc_http_parser_destroy(&conn->http_parser);
     grpc_http_request_destroy(&conn->http_request);
     gpr_unref(&conn->proxy->users);
@@ -150,8 +147,7 @@ enum failure_type {
 };
 
 // Helper function to shut down the proxy connection.
-static void proxy_connection_failed(grpc_exec_ctx* exec_ctx,
-                                    proxy_connection* conn,
+static void proxy_connection_failed(proxy_connection* conn,
                                     failure_type failure, const char* prefix,
                                     grpc_error* error) {
   gpr_log(GPR_INFO, "%s: %s", prefix, grpc_error_string(error));
@@ -175,28 +171,25 @@ static void proxy_connection_failed(grpc_exec_ctx* exec_ctx,
   }
   // If we decided to shut down either one and have not yet done so, do so.
   if (shutdown_client && !conn->client_shutdown) {
-    grpc_endpoint_shutdown(exec_ctx, conn->client_endpoint,
-                           GRPC_ERROR_REF(error));
+    grpc_endpoint_shutdown(conn->client_endpoint, GRPC_ERROR_REF(error));
     conn->client_shutdown = true;
   }
   if (shutdown_server && !conn->server_shutdown &&
       (conn->server_endpoint != nullptr)) {
-    grpc_endpoint_shutdown(exec_ctx, conn->server_endpoint,
-                           GRPC_ERROR_REF(error));
+    grpc_endpoint_shutdown(conn->server_endpoint, GRPC_ERROR_REF(error));
     conn->server_shutdown = true;
   }
   // Unref the connection.
-  proxy_connection_unref(exec_ctx, conn, "conn_failed");
+  proxy_connection_unref(conn, "conn_failed");
   GRPC_ERROR_UNREF(error);
 }
 
 // Callback for writing proxy data to the client.
-static void on_client_write_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void on_client_write_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   conn->client_is_writing = false;
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, CLIENT_WRITE_FAILED,
+    proxy_connection_failed(conn, CLIENT_WRITE_FAILED,
                             "HTTP proxy client write", GRPC_ERROR_REF(error));
     return;
   }
@@ -208,22 +201,20 @@ static void on_client_write_done(grpc_exec_ctx* exec_ctx, void* arg,
     grpc_slice_buffer_move_into(&conn->client_deferred_write_buffer,
                                 &conn->client_write_buffer);
     conn->client_is_writing = true;
-    grpc_endpoint_write(exec_ctx, conn->client_endpoint,
-                        &conn->client_write_buffer,
+    grpc_endpoint_write(conn->client_endpoint, &conn->client_write_buffer,
                         &conn->on_client_write_done);
   } else {
     // No more writes.  Unref the connection.
-    proxy_connection_unref(exec_ctx, conn, "write_done");
+    proxy_connection_unref(conn, "write_done");
   }
 }
 
 // Callback for writing proxy data to the backend server.
-static void on_server_write_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void on_server_write_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   conn->server_is_writing = false;
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, SERVER_WRITE_FAILED,
+    proxy_connection_failed(conn, SERVER_WRITE_FAILED,
                             "HTTP proxy server write", GRPC_ERROR_REF(error));
     return;
   }
@@ -235,23 +226,21 @@ static void on_server_write_done(grpc_exec_ctx* exec_ctx, void* arg,
     grpc_slice_buffer_move_into(&conn->server_deferred_write_buffer,
                                 &conn->server_write_buffer);
     conn->server_is_writing = true;
-    grpc_endpoint_write(exec_ctx, conn->server_endpoint,
-                        &conn->server_write_buffer,
+    grpc_endpoint_write(conn->server_endpoint, &conn->server_write_buffer,
                         &conn->on_server_write_done);
   } else {
     // No more writes.  Unref the connection.
-    proxy_connection_unref(exec_ctx, conn, "server_write");
+    proxy_connection_unref(conn, "server_write");
   }
 }
 
 // Callback for reading data from the client, which will be proxied to
 // the backend server.
-static void on_client_read_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_error* error) {
+static void on_client_read_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, CLIENT_READ_FAILED,
-                            "HTTP proxy client read", GRPC_ERROR_REF(error));
+    proxy_connection_failed(conn, CLIENT_READ_FAILED, "HTTP proxy client read",
+                            GRPC_ERROR_REF(error));
     return;
   }
   // If there is already a pending write (i.e., server_write_buffer is
@@ -268,23 +257,21 @@ static void on_client_read_done(grpc_exec_ctx* exec_ctx, void* arg,
                                 &conn->server_write_buffer);
     proxy_connection_ref(conn, "client_read");
     conn->server_is_writing = true;
-    grpc_endpoint_write(exec_ctx, conn->server_endpoint,
-                        &conn->server_write_buffer,
+    grpc_endpoint_write(conn->server_endpoint, &conn->server_write_buffer,
                         &conn->on_server_write_done);
   }
   // Read more data.
-  grpc_endpoint_read(exec_ctx, conn->client_endpoint, &conn->client_read_buffer,
+  grpc_endpoint_read(conn->client_endpoint, &conn->client_read_buffer,
                      &conn->on_client_read_done);
 }
 
 // Callback for reading data from the backend server, which will be
 // proxied to the client.
-static void on_server_read_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_error* error) {
+static void on_server_read_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, SERVER_READ_FAILED,
-                            "HTTP proxy server read", GRPC_ERROR_REF(error));
+    proxy_connection_failed(conn, SERVER_READ_FAILED, "HTTP proxy server read",
+                            GRPC_ERROR_REF(error));
     return;
   }
   // If there is already a pending write (i.e., client_write_buffer is
@@ -301,23 +288,21 @@ static void on_server_read_done(grpc_exec_ctx* exec_ctx, void* arg,
                                 &conn->client_write_buffer);
     proxy_connection_ref(conn, "server_read");
     conn->client_is_writing = true;
-    grpc_endpoint_write(exec_ctx, conn->client_endpoint,
-                        &conn->client_write_buffer,
+    grpc_endpoint_write(conn->client_endpoint, &conn->client_write_buffer,
                         &conn->on_client_write_done);
   }
   // Read more data.
-  grpc_endpoint_read(exec_ctx, conn->server_endpoint, &conn->server_read_buffer,
+  grpc_endpoint_read(conn->server_endpoint, &conn->server_read_buffer,
                      &conn->on_server_read_done);
 }
 
 // Callback to write the HTTP response for the CONNECT request.
-static void on_write_response_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void on_write_response_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   conn->client_is_writing = false;
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
-                            "HTTP proxy write response", GRPC_ERROR_REF(error));
+    proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy write response",
+                            GRPC_ERROR_REF(error));
     return;
   }
   // Clear write buffer.
@@ -327,17 +312,16 @@ static void on_write_response_done(grpc_exec_ctx* exec_ctx, void* arg,
   // for the other one.
   proxy_connection_ref(conn, "client_read");
   proxy_connection_ref(conn, "server_read");
-  proxy_connection_unref(exec_ctx, conn, "write_response");
-  grpc_endpoint_read(exec_ctx, conn->client_endpoint, &conn->client_read_buffer,
+  proxy_connection_unref(conn, "write_response");
+  grpc_endpoint_read(conn->client_endpoint, &conn->client_read_buffer,
                      &conn->on_client_read_done);
-  grpc_endpoint_read(exec_ctx, conn->server_endpoint, &conn->server_read_buffer,
+  grpc_endpoint_read(conn->server_endpoint, &conn->server_read_buffer,
                      &conn->on_server_read_done);
 }
 
 // Callback to connect to the backend server specified by the HTTP
 // CONNECT request.
-static void on_server_connect_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void on_server_connect_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   if (error != GRPC_ERROR_NONE) {
     // TODO(roth): Technically, in this case, we should handle the error
@@ -345,8 +329,8 @@ static void on_server_connect_done(grpc_exec_ctx* exec_ctx, void* arg,
     // connection failed.  However, for the purposes of this test code,
     // it's fine to pretend this is a client-side error, which will
     // cause the client connection to be dropped.
-    proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
-                            "HTTP proxy server connect", GRPC_ERROR_REF(error));
+    proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy server connect",
+                            GRPC_ERROR_REF(error));
     return;
   }
   // We've established a connection, so send back a 200 response code to
@@ -356,8 +340,7 @@ static void on_server_connect_done(grpc_exec_ctx* exec_ctx, void* arg,
       grpc_slice_from_copied_string("HTTP/1.0 200 connected\r\n\r\n");
   grpc_slice_buffer_add(&conn->client_write_buffer, slice);
   conn->client_is_writing = true;
-  grpc_endpoint_write(exec_ctx, conn->client_endpoint,
-                      &conn->client_write_buffer,
+  grpc_endpoint_write(conn->client_endpoint, &conn->client_write_buffer,
                       &conn->on_write_response_done);
 }
 
@@ -366,8 +349,7 @@ static void on_server_connect_done(grpc_exec_ctx* exec_ctx, void* arg,
  * Basic <base64_encoded_expected_cred>
  * Returns true if it matches, false otherwise
  */
-static bool proxy_auth_header_matches(grpc_exec_ctx* exec_ctx,
-                                      char* proxy_auth_header_val,
+static bool proxy_auth_header_matches(char* proxy_auth_header_val,
                                       char* expected_cred) {
   GPR_ASSERT(proxy_auth_header_val != nullptr);
   GPR_ASSERT(expected_cred != nullptr);
@@ -375,11 +357,10 @@ static bool proxy_auth_header_matches(grpc_exec_ctx* exec_ctx,
     return false;
   }
   proxy_auth_header_val += 6;
-  grpc_slice decoded_slice =
-      grpc_base64_decode(exec_ctx, proxy_auth_header_val, 0);
+  grpc_slice decoded_slice = grpc_base64_decode(proxy_auth_header_val, 0);
   const bool header_matches =
       grpc_slice_str_cmp(decoded_slice, expected_cred) == 0;
-  grpc_slice_unref_internal(exec_ctx, decoded_slice);
+  grpc_slice_unref_internal(decoded_slice);
   return header_matches;
 }
 
@@ -389,14 +370,13 @@ static bool proxy_auth_header_matches(grpc_exec_ctx* exec_ctx,
 // the client indicating that the request failed.  However, for the purposes
 // of this test code, it's fine to pretend this is a client-side error,
 // which will cause the client connection to be dropped.
-static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void on_read_request_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   gpr_log(GPR_DEBUG, "on_read_request_done: %p %s", conn,
           grpc_error_string(error));
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
-                            "HTTP proxy read request", GRPC_ERROR_REF(error));
+    proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy read request",
+                            GRPC_ERROR_REF(error));
     return;
   }
   // Read request and feed it to the parser.
@@ -405,8 +385,7 @@ static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
       error = grpc_http_parser_parse(
           &conn->http_parser, conn->client_read_buffer.slices[i], nullptr);
       if (error != GRPC_ERROR_NONE) {
-        proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
-                                "HTTP proxy request parse",
+        proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy request parse",
                                 GRPC_ERROR_REF(error));
         GRPC_ERROR_UNREF(error);
         return;
@@ -416,8 +395,8 @@ static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
   grpc_slice_buffer_reset_and_unref(&conn->client_read_buffer);
   // If we're not done reading the request, read more data.
   if (conn->http_parser.state != GRPC_HTTP_BODY) {
-    grpc_endpoint_read(exec_ctx, conn->client_endpoint,
-                       &conn->client_read_buffer, &conn->on_read_request_done);
+    grpc_endpoint_read(conn->client_endpoint, &conn->client_read_buffer,
+                       &conn->on_read_request_done);
     return;
   }
   // Make sure we got a CONNECT request.
@@ -427,8 +406,8 @@ static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
                  conn->http_request.method);
     error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
     gpr_free(msg);
-    proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
-                            "HTTP proxy read request", GRPC_ERROR_REF(error));
+    proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy read request",
+                            GRPC_ERROR_REF(error));
     GRPC_ERROR_UNREF(error);
     return;
   }
@@ -440,16 +419,15 @@ static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
     for (size_t i = 0; i < conn->http_request.hdr_count; i++) {
       if (strcmp(conn->http_request.hdrs[i].key, "Proxy-Authorization") == 0) {
         client_authenticated = proxy_auth_header_matches(
-            exec_ctx, conn->http_request.hdrs[i].value,
-            proxy_auth_arg->value.string);
+            conn->http_request.hdrs[i].value, proxy_auth_arg->value.string);
         break;
       }
     }
     if (!client_authenticated) {
       const char* msg = "HTTP Connect could not verify authentication";
       error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(msg);
-      proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
-                              "HTTP proxy read request", GRPC_ERROR_REF(error));
+      proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy read request",
+                              GRPC_ERROR_REF(error));
       GRPC_ERROR_UNREF(error);
       return;
     }
@@ -459,8 +437,8 @@ static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
   error = grpc_blocking_resolve_address(conn->http_request.path, "80",
                                         &resolved_addresses);
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
-                            "HTTP proxy DNS lookup", GRPC_ERROR_REF(error));
+    proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy DNS lookup",
+                            GRPC_ERROR_REF(error));
     GRPC_ERROR_UNREF(error);
     return;
   }
@@ -468,15 +446,15 @@ static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
   // Connect to requested address.
   // The connection callback inherits our reference to conn.
   const grpc_millis deadline =
-      grpc_exec_ctx_now(exec_ctx) + 10 * GPR_MS_PER_SEC;
-  grpc_tcp_client_connect(exec_ctx, &conn->on_server_connect_done,
-                          &conn->server_endpoint, conn->pollset_set, nullptr,
+      grpc_core::ExecCtx::Get()->Now() + 10 * GPR_MS_PER_SEC;
+  grpc_tcp_client_connect(&conn->on_server_connect_done, &conn->server_endpoint,
+                          conn->pollset_set, nullptr,
                           &resolved_addresses->addrs[0], deadline);
   grpc_resolved_addresses_destroy(resolved_addresses);
 }
 
-static void on_accept(grpc_exec_ctx* exec_ctx, void* arg,
-                      grpc_endpoint* endpoint, grpc_pollset* accepting_pollset,
+static void on_accept(void* arg, grpc_endpoint* endpoint,
+                      grpc_pollset* accepting_pollset,
                       grpc_tcp_server_acceptor* acceptor) {
   gpr_free(acceptor);
   grpc_end2end_http_proxy* proxy = (grpc_end2end_http_proxy*)arg;
@@ -487,8 +465,8 @@ static void on_accept(grpc_exec_ctx* exec_ctx, void* arg,
   conn->proxy = proxy;
   gpr_ref_init(&conn->refcount, 1);
   conn->pollset_set = grpc_pollset_set_create();
-  grpc_pollset_set_add_pollset(exec_ctx, conn->pollset_set, proxy->pollset);
-  grpc_endpoint_add_to_pollset_set(exec_ctx, endpoint, conn->pollset_set);
+  grpc_pollset_set_add_pollset(conn->pollset_set, proxy->pollset);
+  grpc_endpoint_add_to_pollset_set(endpoint, conn->pollset_set);
   GRPC_CLOSURE_INIT(&conn->on_read_request_done, on_read_request_done, conn,
                     grpc_combiner_scheduler(conn->proxy->combiner));
   GRPC_CLOSURE_INIT(&conn->on_server_connect_done, on_server_connect_done, conn,
@@ -513,7 +491,7 @@ static void on_accept(grpc_exec_ctx* exec_ctx, void* arg,
   grpc_slice_buffer_init(&conn->server_write_buffer);
   grpc_http_parser_init(&conn->http_parser, GRPC_HTTP_REQUEST,
                         &conn->http_request);
-  grpc_endpoint_read(exec_ctx, conn->client_endpoint, &conn->client_read_buffer,
+  grpc_endpoint_read(conn->client_endpoint, &conn->client_read_buffer,
                      &conn->on_read_request_done);
 }
 
@@ -523,24 +501,23 @@ static void on_accept(grpc_exec_ctx* exec_ctx, void* arg,
 
 static void thread_main(void* arg) {
   grpc_end2end_http_proxy* proxy = (grpc_end2end_http_proxy*)arg;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   do {
     gpr_ref(&proxy->users);
     grpc_pollset_worker* worker = nullptr;
     gpr_mu_lock(proxy->mu);
     GRPC_LOG_IF_ERROR(
         "grpc_pollset_work",
-        grpc_pollset_work(&exec_ctx, proxy->pollset, &worker,
-                          grpc_exec_ctx_now(&exec_ctx) + GPR_MS_PER_SEC));
+        grpc_pollset_work(proxy->pollset, &worker,
+                          grpc_core::ExecCtx::Get()->Now() + GPR_MS_PER_SEC));
     gpr_mu_unlock(proxy->mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   } while (!gpr_unref(&proxy->users));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 grpc_end2end_http_proxy* grpc_end2end_http_proxy_create(
     grpc_channel_args* args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_end2end_http_proxy* proxy =
       (grpc_end2end_http_proxy*)gpr_malloc(sizeof(*proxy));
   memset(proxy, 0, sizeof(*proxy));
@@ -552,8 +529,8 @@ grpc_end2end_http_proxy* grpc_end2end_http_proxy_create(
   gpr_log(GPR_INFO, "Proxy address: %s", proxy->proxy_name);
   // Create TCP server.
   proxy->channel_args = grpc_channel_args_copy(args);
-  grpc_error* error = grpc_tcp_server_create(
-      &exec_ctx, nullptr, proxy->channel_args, &proxy->server);
+  grpc_error* error =
+      grpc_tcp_server_create(nullptr, proxy->channel_args, &proxy->server);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   // Bind to port.
   grpc_resolved_address resolved_addr;
@@ -568,37 +545,35 @@ grpc_end2end_http_proxy* grpc_end2end_http_proxy_create(
   // Start server.
   proxy->pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
   grpc_pollset_init(proxy->pollset, &proxy->mu);
-  grpc_tcp_server_start(&exec_ctx, proxy->server, &proxy->pollset, 1, on_accept,
-                        proxy);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_start(proxy->server, &proxy->pollset, 1, on_accept, proxy);
+
   // Start proxy thread.
   gpr_thd_options opt = gpr_thd_options_default();
   gpr_thd_options_set_joinable(&opt);
-  GPR_ASSERT(gpr_thd_new(&proxy->thd, thread_main, proxy, &opt));
+  GPR_ASSERT(
+      gpr_thd_new(&proxy->thd, "grpc_http_proxy", thread_main, proxy, &opt));
   return proxy;
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void destroy_pollset(void* arg, grpc_error* error) {
   grpc_pollset* pollset = (grpc_pollset*)arg;
-  grpc_pollset_destroy(exec_ctx, pollset);
+  grpc_pollset_destroy(pollset);
   gpr_free(pollset);
 }
 
 void grpc_end2end_http_proxy_destroy(grpc_end2end_http_proxy* proxy) {
   gpr_unref(&proxy->users);  // Signal proxy thread to shutdown.
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_thd_join(proxy->thd);
-  grpc_tcp_server_shutdown_listeners(&exec_ctx, proxy->server);
-  grpc_tcp_server_unref(&exec_ctx, proxy->server);
+  grpc_tcp_server_shutdown_listeners(proxy->server);
+  grpc_tcp_server_unref(proxy->server);
   gpr_free(proxy->proxy_name);
-  grpc_channel_args_destroy(&exec_ctx, proxy->channel_args);
-  grpc_pollset_shutdown(&exec_ctx, proxy->pollset,
+  grpc_channel_args_destroy(proxy->channel_args);
+  grpc_pollset_shutdown(proxy->pollset,
                         GRPC_CLOSURE_CREATE(destroy_pollset, proxy->pollset,
                                             grpc_schedule_on_exec_ctx));
-  GRPC_COMBINER_UNREF(&exec_ctx, proxy->combiner, "test");
+  GRPC_COMBINER_UNREF(proxy->combiner, "test");
   gpr_free(proxy);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 const char* grpc_end2end_http_proxy_get_proxy_name(
diff --git a/test/core/end2end/fixtures/proxy.cc b/test/core/end2end/fixtures/proxy.cc
index 2fab62b721..b1698c804c 100644
--- a/test/core/end2end/fixtures/proxy.cc
+++ b/test/core/end2end/fixtures/proxy.cc
@@ -98,7 +98,8 @@ grpc_end2end_proxy* grpc_end2end_proxy_create(const grpc_end2end_proxy_def* def,
 
   grpc_call_details_init(&proxy->new_call_details);
   gpr_thd_options_set_joinable(&opt);
-  GPR_ASSERT(gpr_thd_new(&proxy->thd, thread_main, proxy, &opt));
+  GPR_ASSERT(
+      gpr_thd_new(&proxy->thd, "grpc_end2end_proxy", thread_main, proxy, &opt));
 
   request_call(proxy);
 
diff --git a/test/core/end2end/fuzzers/api_fuzzer.cc b/test/core/end2end/fuzzers/api_fuzzer.cc
index 75117218e4..967a6d560f 100644
--- a/test/core/end2end/fuzzers/api_fuzzer.cc
+++ b/test/core/end2end/fuzzers/api_fuzzer.cc
@@ -376,8 +376,7 @@ typedef struct addr_req {
   grpc_lb_addresses** lb_addrs;
 } addr_req;
 
-static void finish_resolve(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
+static void finish_resolve(void* arg, grpc_error* error) {
   addr_req* r = static_cast<addr_req*>(arg);
 
   if (error == GRPC_ERROR_NONE && 0 == strcmp(r->addr, "server")) {
@@ -395,9 +394,9 @@ static void finish_resolve(grpc_exec_ctx* exec_ctx, void* arg,
                                     nullptr);
       *r->lb_addrs = lb_addrs;
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, r->on_done, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(r->on_done, GRPC_ERROR_NONE);
   } else {
-    GRPC_CLOSURE_SCHED(exec_ctx, r->on_done,
+    GRPC_CLOSURE_SCHED(r->on_done,
                        GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                            "Resolution failed", &error, 1));
   }
@@ -406,8 +405,7 @@ static void finish_resolve(grpc_exec_ctx* exec_ctx, void* arg,
   gpr_free(r);
 }
 
-void my_resolve_address(grpc_exec_ctx* exec_ctx, const char* addr,
-                        const char* default_port,
+void my_resolve_address(const char* addr, const char* default_port,
                         grpc_pollset_set* interested_parties,
                         grpc_closure* on_done,
                         grpc_resolved_addresses** addresses) {
@@ -417,22 +415,24 @@ void my_resolve_address(grpc_exec_ctx* exec_ctx, const char* addr,
   r->addrs = addresses;
   r->lb_addrs = nullptr;
   grpc_timer_init(
-      exec_ctx, &r->timer, GPR_MS_PER_SEC + grpc_exec_ctx_now(exec_ctx),
+      &r->timer, GPR_MS_PER_SEC + grpc_core::ExecCtx::Get()->Now(),
       GRPC_CLOSURE_CREATE(finish_resolve, r, grpc_schedule_on_exec_ctx));
 }
 
-grpc_ares_request* my_dns_lookup_ares(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* addr,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** lb_addrs, bool check_grpclb,
-    char** service_config_json) {
+grpc_ares_request* my_dns_lookup_ares(const char* dns_server, const char* addr,
+                                      const char* default_port,
+                                      grpc_pollset_set* interested_parties,
+                                      grpc_closure* on_done,
+                                      grpc_lb_addresses** lb_addrs,
+                                      bool check_grpclb,
+                                      char** service_config_json) {
   addr_req* r = static_cast<addr_req*>(gpr_malloc(sizeof(*r)));
   r->addr = gpr_strdup(addr);
   r->on_done = on_done;
   r->addrs = nullptr;
   r->lb_addrs = lb_addrs;
   grpc_timer_init(
-      exec_ctx, &r->timer, GPR_MS_PER_SEC + grpc_exec_ctx_now(exec_ctx),
+      &r->timer, GPR_MS_PER_SEC + grpc_core::ExecCtx::Get()->Now(),
       GRPC_CLOSURE_CREATE(finish_resolve, r, grpc_schedule_on_exec_ctx));
   return nullptr;
 }
@@ -442,12 +442,12 @@ grpc_ares_request* my_dns_lookup_ares(
 
 // defined in tcp_client_posix.c
 extern void (*grpc_tcp_client_connect_impl)(
-    grpc_exec_ctx* exec_ctx, grpc_closure* closure, grpc_endpoint** ep,
+    grpc_closure* closure, grpc_endpoint** ep,
     grpc_pollset_set* interested_parties, const grpc_channel_args* channel_args,
     const grpc_resolved_address* addr, grpc_millis deadline);
 
-static void sched_connect(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                          grpc_endpoint** ep, gpr_timespec deadline);
+static void sched_connect(grpc_closure* closure, grpc_endpoint** ep,
+                          gpr_timespec deadline);
 
 typedef struct {
   grpc_timer timer;
@@ -456,11 +456,11 @@ typedef struct {
   gpr_timespec deadline;
 } future_connect;
 
-static void do_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void do_connect(void* arg, grpc_error* error) {
   future_connect* fc = static_cast<future_connect*>(arg);
   if (error != GRPC_ERROR_NONE) {
     *fc->ep = nullptr;
-    GRPC_CLOSURE_SCHED(exec_ctx, fc->closure, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(fc->closure, GRPC_ERROR_REF(error));
   } else if (g_server != nullptr) {
     grpc_endpoint* client;
     grpc_endpoint* server;
@@ -468,25 +468,23 @@ static void do_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
     *fc->ep = client;
 
     grpc_transport* transport =
-        grpc_create_chttp2_transport(exec_ctx, nullptr, server, false);
-    grpc_server_setup_transport(exec_ctx, g_server, transport, nullptr,
-                                nullptr);
-    grpc_chttp2_transport_start_reading(exec_ctx, transport, nullptr, nullptr);
+        grpc_create_chttp2_transport(nullptr, server, false);
+    grpc_server_setup_transport(g_server, transport, nullptr, nullptr);
+    grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 
-    GRPC_CLOSURE_SCHED(exec_ctx, fc->closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(fc->closure, GRPC_ERROR_NONE);
   } else {
-    sched_connect(exec_ctx, fc->closure, fc->ep, fc->deadline);
+    sched_connect(fc->closure, fc->ep, fc->deadline);
   }
   gpr_free(fc);
 }
 
-static void sched_connect(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                          grpc_endpoint** ep, gpr_timespec deadline) {
+static void sched_connect(grpc_closure* closure, grpc_endpoint** ep,
+                          gpr_timespec deadline) {
   if (gpr_time_cmp(deadline, gpr_now(deadline.clock_type)) < 0) {
     *ep = nullptr;
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, closure,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Connect deadline exceeded"));
+    GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                    "Connect deadline exceeded"));
     return;
   }
 
@@ -495,17 +493,16 @@ static void sched_connect(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
   fc->ep = ep;
   fc->deadline = deadline;
   grpc_timer_init(
-      exec_ctx, &fc->timer, GPR_MS_PER_SEC + grpc_exec_ctx_now(exec_ctx),
+      &fc->timer, GPR_MS_PER_SEC + grpc_core::ExecCtx::Get()->Now(),
       GRPC_CLOSURE_CREATE(do_connect, fc, grpc_schedule_on_exec_ctx));
 }
 
-static void my_tcp_client_connect(grpc_exec_ctx* exec_ctx,
-                                  grpc_closure* closure, grpc_endpoint** ep,
+static void my_tcp_client_connect(grpc_closure* closure, grpc_endpoint** ep,
                                   grpc_pollset_set* interested_parties,
                                   const grpc_channel_args* channel_args,
                                   const grpc_resolved_address* addr,
                                   grpc_millis deadline) {
-  sched_connect(exec_ctx, closure, ep,
+  sched_connect(closure, ep,
                 grpc_millis_to_timespec(deadline, GPR_CLOCK_MONOTONIC));
 }
 
@@ -751,9 +748,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_init();
   grpc_timer_manager_set_threading(false);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_executor_set_threading(&exec_ctx, false);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_executor_set_threading(false);
   }
   grpc_resolve_address = my_resolve_address;
   grpc_dns_lookup_ares = my_dns_lookup_ares;
@@ -846,9 +842,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
           g_channel = grpc_insecure_channel_create(target_uri, args, nullptr);
           GPR_ASSERT(g_channel != nullptr);
           {
-            grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-            grpc_channel_args_destroy(&exec_ctx, args);
-            grpc_exec_ctx_finish(&exec_ctx);
+            grpc_core::ExecCtx exec_ctx;
+            grpc_channel_args_destroy(args);
           }
           gpr_free(target_uri);
           gpr_free(target);
@@ -874,9 +869,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
           g_server = grpc_server_create(args, nullptr);
           GPR_ASSERT(g_server != nullptr);
           {
-            grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-            grpc_channel_args_destroy(&exec_ctx, args);
-            grpc_exec_ctx_finish(&exec_ctx);
+            grpc_core::ExecCtx exec_ctx;
+            grpc_channel_args_destroy(args);
           }
           grpc_server_register_completion_queue(g_server, cq, nullptr);
           grpc_server_start(g_server);
@@ -1205,9 +1199,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
               grpc_secure_channel_create(creds, target_uri, args, nullptr);
           GPR_ASSERT(g_channel != nullptr);
           {
-            grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-            grpc_channel_args_destroy(&exec_ctx, args);
-            grpc_exec_ctx_finish(&exec_ctx);
+            grpc_core::ExecCtx exec_ctx;
+            grpc_channel_args_destroy(args);
           }
           gpr_free(target_uri);
           gpr_free(target);
diff --git a/test/core/end2end/fuzzers/client_fuzzer.cc b/test/core/end2end/fuzzers/client_fuzzer.cc
index 5871f0f43e..c17d581d8b 100644
--- a/test/core/end2end/fuzzers/client_fuzzer.cc
+++ b/test/core/end2end/fuzzers/client_fuzzer.cc
@@ -43,112 +43,114 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   if (squelch) gpr_set_log_function(dont_log);
   if (leak_check) grpc_memory_counters_init();
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_executor_set_threading(&exec_ctx, false);
-
-  grpc_resource_quota* resource_quota =
-      grpc_resource_quota_create("client_fuzzer");
-  grpc_endpoint* mock_endpoint =
-      grpc_mock_endpoint_create(discard_write, resource_quota);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
-
-  grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
-  grpc_transport* transport =
-      grpc_create_chttp2_transport(&exec_ctx, nullptr, mock_endpoint, true);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr, nullptr);
-
-  grpc_channel* channel = grpc_channel_create(
-      &exec_ctx, "test-target", nullptr, GRPC_CLIENT_DIRECT_CHANNEL, transport);
-  grpc_slice host = grpc_slice_from_static_string("localhost");
-  grpc_call* call = grpc_channel_create_call(
-      channel, nullptr, 0, cq, grpc_slice_from_static_string("/foo"), &host,
-      gpr_inf_future(GPR_CLOCK_REALTIME), nullptr);
-
-  grpc_metadata_array initial_metadata_recv;
-  grpc_metadata_array_init(&initial_metadata_recv);
-  grpc_byte_buffer* response_payload_recv = nullptr;
-  grpc_metadata_array trailing_metadata_recv;
-  grpc_metadata_array_init(&trailing_metadata_recv);
-  grpc_status_code status;
-  grpc_slice details = grpc_empty_slice();
-
-  grpc_op ops[6];
-  memset(ops, 0, sizeof(ops));
-  grpc_op* op = ops;
-  op->op = GRPC_OP_SEND_INITIAL_METADATA;
-  op->data.send_initial_metadata.count = 0;
-  op->flags = 0;
-  op->reserved = nullptr;
-  op++;
-  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
-  op->flags = 0;
-  op->reserved = nullptr;
-  op++;
-  op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
-  op->flags = 0;
-  op->reserved = nullptr;
-  op++;
-  op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message.recv_message = &response_payload_recv;
-  op->flags = 0;
-  op->reserved = nullptr;
-  op++;
-  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
-  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
-  op->data.recv_status_on_client.status = &status;
-  op->data.recv_status_on_client.status_details = &details;
-  op->flags = 0;
-  op->reserved = nullptr;
-  op++;
-  grpc_call_error error =
-      grpc_call_start_batch(call, ops, (size_t)(op - ops), tag(1), nullptr);
-  int requested_calls = 1;
-  GPR_ASSERT(GRPC_CALL_OK == error);
-
-  grpc_mock_endpoint_put_read(
-      &exec_ctx, mock_endpoint,
-      grpc_slice_from_copied_buffer((const char*)data, size));
-
-  grpc_event ev;
-  while (1) {
-    grpc_exec_ctx_flush(&exec_ctx);
-    ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
-                                    nullptr);
-    switch (ev.type) {
-      case GRPC_QUEUE_TIMEOUT:
-        goto done;
-      case GRPC_QUEUE_SHUTDOWN:
-        break;
-      case GRPC_OP_COMPLETE:
-        requested_calls--;
-        break;
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_executor_set_threading(false);
+
+    grpc_resource_quota* resource_quota =
+        grpc_resource_quota_create("client_fuzzer");
+    grpc_endpoint* mock_endpoint =
+        grpc_mock_endpoint_create(discard_write, resource_quota);
+    grpc_resource_quota_unref_internal(resource_quota);
+
+    grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
+    grpc_transport* transport =
+        grpc_create_chttp2_transport(nullptr, mock_endpoint, true);
+    grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
+
+    grpc_channel* channel = grpc_channel_create(
+        "test-target", nullptr, GRPC_CLIENT_DIRECT_CHANNEL, transport);
+    grpc_slice host = grpc_slice_from_static_string("localhost");
+    grpc_call* call = grpc_channel_create_call(
+        channel, nullptr, 0, cq, grpc_slice_from_static_string("/foo"), &host,
+        gpr_inf_future(GPR_CLOCK_REALTIME), nullptr);
+
+    grpc_metadata_array initial_metadata_recv;
+    grpc_metadata_array_init(&initial_metadata_recv);
+    grpc_byte_buffer* response_payload_recv = nullptr;
+    grpc_metadata_array trailing_metadata_recv;
+    grpc_metadata_array_init(&trailing_metadata_recv);
+    grpc_status_code status;
+    grpc_slice details = grpc_empty_slice();
+
+    grpc_op ops[6];
+    memset(ops, 0, sizeof(ops));
+    grpc_op* op = ops;
+    op->op = GRPC_OP_SEND_INITIAL_METADATA;
+    op->data.send_initial_metadata.count = 0;
+    op->flags = 0;
+    op->reserved = nullptr;
+    op++;
+    op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+    op->flags = 0;
+    op->reserved = nullptr;
+    op++;
+    op->op = GRPC_OP_RECV_INITIAL_METADATA;
+    op->data.recv_initial_metadata.recv_initial_metadata =
+        &initial_metadata_recv;
+    op->flags = 0;
+    op->reserved = nullptr;
+    op++;
+    op->op = GRPC_OP_RECV_MESSAGE;
+    op->data.recv_message.recv_message = &response_payload_recv;
+    op->flags = 0;
+    op->reserved = nullptr;
+    op++;
+    op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+    op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
+    op->data.recv_status_on_client.status = &status;
+    op->data.recv_status_on_client.status_details = &details;
+    op->flags = 0;
+    op->reserved = nullptr;
+    op++;
+    grpc_call_error error =
+        grpc_call_start_batch(call, ops, (size_t)(op - ops), tag(1), nullptr);
+    int requested_calls = 1;
+    GPR_ASSERT(GRPC_CALL_OK == error);
+
+    grpc_mock_endpoint_put_read(
+        mock_endpoint, grpc_slice_from_copied_buffer((const char*)data, size));
+
+    grpc_event ev;
+    while (1) {
+      grpc_core::ExecCtx::Get()->Flush();
+      ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
+                                      nullptr);
+      switch (ev.type) {
+        case GRPC_QUEUE_TIMEOUT:
+          goto done;
+        case GRPC_QUEUE_SHUTDOWN:
+          break;
+        case GRPC_OP_COMPLETE:
+          requested_calls--;
+          break;
+      }
     }
-  }
 
-done:
-  if (requested_calls) {
-    grpc_call_cancel(call, nullptr);
-  }
-  for (int i = 0; i < requested_calls; i++) {
-    ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
-                                    nullptr);
-    GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
-  }
-  grpc_completion_queue_shutdown(cq);
-  for (int i = 0; i < requested_calls; i++) {
-    ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
-                                    nullptr);
-    GPR_ASSERT(ev.type == GRPC_QUEUE_SHUTDOWN);
-  }
-  grpc_call_unref(call);
-  grpc_completion_queue_destroy(cq);
-  grpc_metadata_array_destroy(&initial_metadata_recv);
-  grpc_metadata_array_destroy(&trailing_metadata_recv);
-  grpc_slice_unref(details);
-  grpc_channel_destroy(channel);
-  if (response_payload_recv != nullptr) {
-    grpc_byte_buffer_destroy(response_payload_recv);
+  done:
+    if (requested_calls) {
+      grpc_call_cancel(call, nullptr);
+    }
+    for (int i = 0; i < requested_calls; i++) {
+      ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
+                                      nullptr);
+      GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
+    }
+    grpc_completion_queue_shutdown(cq);
+    for (int i = 0; i < requested_calls; i++) {
+      ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
+                                      nullptr);
+      GPR_ASSERT(ev.type == GRPC_QUEUE_SHUTDOWN);
+    }
+    grpc_call_unref(call);
+    grpc_completion_queue_destroy(cq);
+    grpc_metadata_array_destroy(&initial_metadata_recv);
+    grpc_metadata_array_destroy(&trailing_metadata_recv);
+    grpc_slice_unref(details);
+    grpc_channel_destroy(channel);
+    if (response_payload_recv != nullptr) {
+      grpc_byte_buffer_destroy(response_payload_recv);
+    }
   }
   grpc_shutdown();
   if (leak_check) {
diff --git a/test/core/end2end/fuzzers/server_fuzzer.cc b/test/core/end2end/fuzzers/server_fuzzer.cc
index 67caf4e720..61c55e0afd 100644
--- a/test/core/end2end/fuzzers/server_fuzzer.cc
+++ b/test/core/end2end/fuzzers/server_fuzzer.cc
@@ -41,81 +41,82 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   if (squelch) gpr_set_log_function(dont_log);
   if (leak_check) grpc_memory_counters_init();
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_executor_set_threading(&exec_ctx, false);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_executor_set_threading(false);
 
-  grpc_resource_quota* resource_quota =
-      grpc_resource_quota_create("server_fuzzer");
-  grpc_endpoint* mock_endpoint =
-      grpc_mock_endpoint_create(discard_write, resource_quota);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
-  grpc_mock_endpoint_put_read(
-      &exec_ctx, mock_endpoint,
-      grpc_slice_from_copied_buffer((const char*)data, size));
+    grpc_resource_quota* resource_quota =
+        grpc_resource_quota_create("server_fuzzer");
+    grpc_endpoint* mock_endpoint =
+        grpc_mock_endpoint_create(discard_write, resource_quota);
+    grpc_resource_quota_unref_internal(resource_quota);
+    grpc_mock_endpoint_put_read(
+        mock_endpoint, grpc_slice_from_copied_buffer((const char*)data, size));
 
-  grpc_server* server = grpc_server_create(nullptr, nullptr);
-  grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
-  grpc_server_register_completion_queue(server, cq, nullptr);
-  // TODO(ctiller): add registered methods (one for POST, one for PUT)
-  // void *registered_method =
-  //    grpc_server_register_method(server, "/reg", NULL, 0);
-  grpc_server_start(server);
-  grpc_transport* transport =
-      grpc_create_chttp2_transport(&exec_ctx, nullptr, mock_endpoint, false);
-  grpc_server_setup_transport(&exec_ctx, server, transport, nullptr, nullptr);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr, nullptr);
+    grpc_server* server = grpc_server_create(nullptr, nullptr);
+    grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
+    grpc_server_register_completion_queue(server, cq, nullptr);
+    // TODO(ctiller): add registered methods (one for POST, one for PUT)
+    // void *registered_method =
+    //    grpc_server_register_method(server, "/reg", NULL, 0);
+    grpc_server_start(server);
+    grpc_transport* transport =
+        grpc_create_chttp2_transport(nullptr, mock_endpoint, false);
+    grpc_server_setup_transport(server, transport, nullptr, nullptr);
+    grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 
-  grpc_call* call1 = nullptr;
-  grpc_call_details call_details1;
-  grpc_metadata_array request_metadata1;
-  grpc_call_details_init(&call_details1);
-  grpc_metadata_array_init(&request_metadata1);
-  int requested_calls = 0;
+    grpc_call* call1 = nullptr;
+    grpc_call_details call_details1;
+    grpc_metadata_array request_metadata1;
+    grpc_call_details_init(&call_details1);
+    grpc_metadata_array_init(&request_metadata1);
+    int requested_calls = 0;
 
-  GPR_ASSERT(GRPC_CALL_OK ==
-             grpc_server_request_call(server, &call1, &call_details1,
-                                      &request_metadata1, cq, cq, tag(1)));
-  requested_calls++;
+    GPR_ASSERT(GRPC_CALL_OK ==
+               grpc_server_request_call(server, &call1, &call_details1,
+                                        &request_metadata1, cq, cq, tag(1)));
+    requested_calls++;
 
-  grpc_event ev;
-  while (1) {
-    grpc_exec_ctx_flush(&exec_ctx);
-    ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
-                                    nullptr);
-    switch (ev.type) {
-      case GRPC_QUEUE_TIMEOUT:
-        goto done;
-      case GRPC_QUEUE_SHUTDOWN:
-        break;
-      case GRPC_OP_COMPLETE:
-        switch (detag(ev.tag)) {
-          case 1:
-            requested_calls--;
-            // TODO(ctiller): keep reading that call!
-            break;
-        }
+    grpc_event ev;
+    while (1) {
+      grpc_core::ExecCtx::Get()->Flush();
+      ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
+                                      nullptr);
+      switch (ev.type) {
+        case GRPC_QUEUE_TIMEOUT:
+          goto done;
+        case GRPC_QUEUE_SHUTDOWN:
+          break;
+        case GRPC_OP_COMPLETE:
+          switch (detag(ev.tag)) {
+            case 1:
+              requested_calls--;
+              // TODO(ctiller): keep reading that call!
+              break;
+          }
+      }
     }
-  }
 
-done:
-  if (call1 != nullptr) grpc_call_unref(call1);
-  grpc_call_details_destroy(&call_details1);
-  grpc_metadata_array_destroy(&request_metadata1);
-  grpc_server_shutdown_and_notify(server, cq, tag(0xdead));
-  grpc_server_cancel_all_calls(server);
-  for (int i = 0; i <= requested_calls; i++) {
-    ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
-                                    nullptr);
-    GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
-  }
-  grpc_completion_queue_shutdown(cq);
-  for (int i = 0; i <= requested_calls; i++) {
-    ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
-                                    nullptr);
-    GPR_ASSERT(ev.type == GRPC_QUEUE_SHUTDOWN);
+  done:
+    if (call1 != nullptr) grpc_call_unref(call1);
+    grpc_call_details_destroy(&call_details1);
+    grpc_metadata_array_destroy(&request_metadata1);
+    grpc_server_shutdown_and_notify(server, cq, tag(0xdead));
+    grpc_server_cancel_all_calls(server);
+    for (int i = 0; i <= requested_calls; i++) {
+      ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
+                                      nullptr);
+      GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
+    }
+    grpc_completion_queue_shutdown(cq);
+    for (int i = 0; i <= requested_calls; i++) {
+      ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
+                                      nullptr);
+      GPR_ASSERT(ev.type == GRPC_QUEUE_SHUTDOWN);
+    }
+    grpc_server_destroy(server);
+    grpc_completion_queue_destroy(cq);
   }
-  grpc_server_destroy(server);
-  grpc_completion_queue_destroy(cq);
   grpc_shutdown();
   if (leak_check) {
     counters = grpc_memory_counters_snapshot();
diff --git a/test/core/end2end/goaway_server_test.cc b/test/core/end2end/goaway_server_test.cc
index 2d0db967c3..94cfbdda7e 100644
--- a/test/core/end2end/goaway_server_test.cc
+++ b/test/core/end2end/goaway_server_test.cc
@@ -39,16 +39,15 @@ static void* tag(intptr_t i) { return (void*)i; }
 
 static gpr_mu g_mu;
 static int g_resolve_port = -1;
-static void (*iomgr_resolve_address)(grpc_exec_ctx* exec_ctx, const char* addr,
-                                     const char* default_port,
+static void (*iomgr_resolve_address)(const char* addr, const char* default_port,
                                      grpc_pollset_set* interested_parties,
                                      grpc_closure* on_done,
                                      grpc_resolved_addresses** addresses);
 
 static grpc_ares_request* (*iomgr_dns_lookup_ares)(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* addr,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** addresses, bool check_grpclb,
+    const char* dns_server, const char* addr, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** addresses, bool check_grpclb,
     char** service_config_json);
 
 static void set_resolve_port(int port) {
@@ -57,14 +56,13 @@ static void set_resolve_port(int port) {
   gpr_mu_unlock(&g_mu);
 }
 
-static void my_resolve_address(grpc_exec_ctx* exec_ctx, const char* addr,
-                               const char* default_port,
+static void my_resolve_address(const char* addr, const char* default_port,
                                grpc_pollset_set* interested_parties,
                                grpc_closure* on_done,
                                grpc_resolved_addresses** addrs) {
   if (0 != strcmp(addr, "test")) {
-    iomgr_resolve_address(exec_ctx, addr, default_port, interested_parties,
-                          on_done, addrs);
+    iomgr_resolve_address(addr, default_port, interested_parties, on_done,
+                          addrs);
     return;
   }
 
@@ -86,16 +84,16 @@ static void my_resolve_address(grpc_exec_ctx* exec_ctx, const char* addr,
     (*addrs)->addrs[0].len = sizeof(*sa);
     gpr_mu_unlock(&g_mu);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, error);
+  GRPC_CLOSURE_SCHED(on_done, error);
 }
 
 static grpc_ares_request* my_dns_lookup_ares(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* addr,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** lb_addrs, bool check_grpclb,
+    const char* dns_server, const char* addr, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** lb_addrs, bool check_grpclb,
     char** service_config_json) {
   if (0 != strcmp(addr, "test")) {
-    return iomgr_dns_lookup_ares(exec_ctx, dns_server, addr, default_port,
+    return iomgr_dns_lookup_ares(dns_server, addr, default_port,
                                  interested_parties, on_done, lb_addrs,
                                  check_grpclb, service_config_json);
   }
@@ -117,7 +115,7 @@ static grpc_ares_request* my_dns_lookup_ares(
     gpr_free(sa);
     gpr_mu_unlock(&g_mu);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, error);
+  GRPC_CLOSURE_SCHED(on_done, error);
   return nullptr;
 }
 
diff --git a/test/core/end2end/h2_ssl_cert_test.cc b/test/core/end2end/h2_ssl_cert_test.cc
index 9a98c07158..d50d1f4d81 100644
--- a/test/core/end2end/h2_ssl_cert_test.cc
+++ b/test/core/end2end/h2_ssl_cert_test.cc
@@ -181,9 +181,8 @@ typedef enum { NONE, SELF_SIGNED, SIGNED, BAD_CERT_PAIR } certtype;
         grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);  \
     chttp2_init_client_secure_fullstack(f, new_client_args, ssl_creds);      \
     {                                                                        \
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;                           \
-      grpc_channel_args_destroy(&exec_ctx, new_client_args);                 \
-      grpc_exec_ctx_finish(&exec_ctx);                                       \
+      grpc_core::ExecCtx exec_ctx;                                           \
+      grpc_channel_args_destroy(new_client_args);                            \
     }                                                                        \
   }
 
diff --git a/test/core/end2end/tests/cancel_after_accept.cc b/test/core/end2end/tests/cancel_after_accept.cc
index 83439d71d2..f59caf7e35 100644
--- a/test/core/end2end/tests/cancel_after_accept.cc
+++ b/test/core/end2end/tests/cancel_after_accept.cc
@@ -245,9 +245,8 @@ static void test_cancel_after_accept(grpc_end2end_test_config config,
   grpc_call_unref(s);
 
   if (args != nullptr) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(args);
   }
 
   cq_verifier_destroy(cqv);
diff --git a/test/core/end2end/tests/cancel_after_round_trip.cc b/test/core/end2end/tests/cancel_after_round_trip.cc
index ddcec67de5..b10b93978d 100644
--- a/test/core/end2end/tests/cancel_after_round_trip.cc
+++ b/test/core/end2end/tests/cancel_after_round_trip.cc
@@ -278,9 +278,8 @@ static void test_cancel_after_round_trip(grpc_end2end_test_config config,
   grpc_call_unref(s);
 
   if (args != nullptr) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(args);
   }
 
   cq_verifier_destroy(cqv);
diff --git a/test/core/end2end/tests/compressed_payload.cc b/test/core/end2end/tests/compressed_payload.cc
index a8ea0ff2e0..944edc7a70 100644
--- a/test/core/end2end/tests/compressed_payload.cc
+++ b/test/core/end2end/tests/compressed_payload.cc
@@ -129,10 +129,9 @@ static void request_for_disabled_algorithm(
   server_args =
       grpc_channel_args_set_compression_algorithm(nullptr, GRPC_COMPRESS_NONE);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     server_args = grpc_channel_args_compression_algorithm_set_state(
-        &exec_ctx, &server_args, algorithm_to_disable, false);
-    grpc_exec_ctx_finish(&exec_ctx);
+        &server_args, algorithm_to_disable, false);
   }
 
   f = begin_test(config, test_name, client_args, server_args);
@@ -257,10 +256,9 @@ static void request_for_disabled_algorithm(
   grpc_byte_buffer_destroy(request_payload_recv);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 
   end_test(&f);
@@ -539,10 +537,9 @@ static void request_with_payload_template(
   cq_verifier_destroy(cqv);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 
   end_test(&f);
diff --git a/test/core/end2end/tests/connectivity.cc b/test/core/end2end/tests/connectivity.cc
index 2ea4ca81f5..da65080bc0 100644
--- a/test/core/end2end/tests/connectivity.cc
+++ b/test/core/end2end/tests/connectivity.cc
@@ -68,7 +68,8 @@ static void test_connectivity(grpc_end2end_test_config config) {
   ce.cq = f.cq;
   gpr_event_init(&ce.started);
   gpr_thd_options_set_joinable(&thdopt);
-  GPR_ASSERT(gpr_thd_new(&thdid, child_thread, &ce, &thdopt));
+  GPR_ASSERT(
+      gpr_thd_new(&thdid, "grpc_connectivity", child_thread, &ce, &thdopt));
 
   gpr_event_wait(&ce.started, gpr_inf_future(GPR_CLOCK_MONOTONIC));
 
diff --git a/test/core/end2end/tests/filter_call_init_fails.cc b/test/core/end2end/tests/filter_call_init_fails.cc
index 6eed68a2f9..8f46f0bb91 100644
--- a/test/core/end2end/tests/filter_call_init_fails.cc
+++ b/test/core/end2end/tests/filter_call_init_fails.cc
@@ -399,26 +399,23 @@ static void test_client_subchannel_filter(grpc_end2end_test_config config) {
  * Test filter - always fails to initialize a call
  */
 
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   return grpc_error_set_int(
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("access denied"),
       GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_PERMISSION_DENIED);
 }
 
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 static const grpc_channel_filter test_filter = {
     grpc_call_next_op,
@@ -437,8 +434,7 @@ static const grpc_channel_filter test_filter = {
  * Registration
  */
 
-static bool maybe_add_server_channel_filter(grpc_exec_ctx* exec_ctx,
-                                            grpc_channel_stack_builder* builder,
+static bool maybe_add_server_channel_filter(grpc_channel_stack_builder* builder,
                                             void* arg) {
   if (g_enable_server_channel_filter) {
     // Want to add the filter as close to the end as possible, to make
@@ -457,8 +453,7 @@ static bool maybe_add_server_channel_filter(grpc_exec_ctx* exec_ctx,
   }
 }
 
-static bool maybe_add_client_channel_filter(grpc_exec_ctx* exec_ctx,
-                                            grpc_channel_stack_builder* builder,
+static bool maybe_add_client_channel_filter(grpc_channel_stack_builder* builder,
                                             void* arg) {
   if (g_enable_client_channel_filter) {
     // Want to add the filter as close to the end as possible, to make
@@ -478,7 +473,7 @@ static bool maybe_add_client_channel_filter(grpc_exec_ctx* exec_ctx,
 }
 
 static bool maybe_add_client_subchannel_filter(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, void* arg) {
+    grpc_channel_stack_builder* builder, void* arg) {
   if (g_enable_client_subchannel_filter) {
     // Want to add the filter as close to the end as possible, to make
     // sure that all of the filters work well together.  However, we
diff --git a/test/core/end2end/tests/filter_causes_close.cc b/test/core/end2end/tests/filter_causes_close.cc
index 793f590686..ec8f9dbe00 100644
--- a/test/core/end2end/tests/filter_causes_close.cc
+++ b/test/core/end2end/tests/filter_causes_close.cc
@@ -197,12 +197,11 @@ typedef struct {
   uint8_t unused;
 } channel_data;
 
-static void recv_im_ready(grpc_exec_ctx* exec_ctx, void* arg,
-                          grpc_error* error) {
+static void recv_im_ready(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   GRPC_CLOSURE_RUN(
-      exec_ctx, calld->recv_im_ready,
+      calld->recv_im_ready,
       grpc_error_set_int(GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Failure that's not preventable.", &error, 1),
                          GRPC_ERROR_INT_GRPC_STATUS,
@@ -210,8 +209,7 @@ static void recv_im_ready(grpc_exec_ctx* exec_ctx, void* arg,
 }
 
 static void start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   call_data* calld = (call_data*)elem->call_data;
   if (op->recv_initial_metadata) {
     calld->recv_im_ready =
@@ -219,27 +217,24 @@ static void start_transport_stream_op_batch(
     op->payload->recv_initial_metadata.recv_initial_metadata_ready =
         GRPC_CLOSURE_CREATE(recv_im_ready, elem, grpc_schedule_on_exec_ctx);
   }
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 }
 
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 static const grpc_channel_filter test_filter = {
     start_transport_stream_op_batch,
@@ -258,8 +253,7 @@ static const grpc_channel_filter test_filter = {
  * Registration
  */
 
-static bool maybe_add_filter(grpc_exec_ctx* exec_ctx,
-                             grpc_channel_stack_builder* builder, void* arg) {
+static bool maybe_add_filter(grpc_channel_stack_builder* builder, void* arg) {
   if (g_enable_filter) {
     return grpc_channel_stack_builder_prepend_filter(builder, &test_filter,
                                                      nullptr, nullptr);
diff --git a/test/core/end2end/tests/filter_latency.cc b/test/core/end2end/tests/filter_latency.cc
index c4d96ebfe2..845cbc01cf 100644
--- a/test/core/end2end/tests/filter_latency.cc
+++ b/test/core/end2end/tests/filter_latency.cc
@@ -247,14 +247,12 @@ static void test_request(grpc_end2end_test_config config) {
  * Test latency filter
  */
 
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void client_destroy_call_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_element* elem,
+static void client_destroy_call_elem(grpc_call_element* elem,
                                      const grpc_call_final_info* final_info,
                                      grpc_closure* ignored) {
   gpr_mu_lock(&g_mu);
@@ -262,8 +260,7 @@ static void client_destroy_call_elem(grpc_exec_ctx* exec_ctx,
   gpr_mu_unlock(&g_mu);
 }
 
-static void server_destroy_call_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_element* elem,
+static void server_destroy_call_elem(grpc_call_element* elem,
                                      const grpc_call_final_info* final_info,
                                      grpc_closure* ignored) {
   gpr_mu_lock(&g_mu);
@@ -271,14 +268,12 @@ static void server_destroy_call_elem(grpc_exec_ctx* exec_ctx,
   gpr_mu_unlock(&g_mu);
 }
 
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 static const grpc_channel_filter test_client_filter = {
     grpc_call_next_op,
@@ -310,8 +305,7 @@ static const grpc_channel_filter test_server_filter = {
  * Registration
  */
 
-static bool maybe_add_filter(grpc_exec_ctx* exec_ctx,
-                             grpc_channel_stack_builder* builder, void* arg) {
+static bool maybe_add_filter(grpc_channel_stack_builder* builder, void* arg) {
   grpc_channel_filter* filter = (grpc_channel_filter*)arg;
   if (g_enable_filter) {
     // Want to add the filter as close to the end as possible, to make
diff --git a/test/core/end2end/tests/load_reporting_hook.cc b/test/core/end2end/tests/load_reporting_hook.cc
index faabec34cb..e056bd547b 100644
--- a/test/core/end2end/tests/load_reporting_hook.cc
+++ b/test/core/end2end/tests/load_reporting_hook.cc
@@ -300,9 +300,8 @@ static void test_load_reporting_hook(grpc_end2end_test_config config) {
                                 &trailing_lr_metadata);
   end_test(&f);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, lr_server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(lr_server_args);
   }
   config.tear_down_data(&f);
 }
diff --git a/test/core/end2end/tests/max_message_length.cc b/test/core/end2end/tests/max_message_length.cc
index f1ac27fa7c..e581f1fc20 100644
--- a/test/core/end2end/tests/max_message_length.cc
+++ b/test/core/end2end/tests/max_message_length.cc
@@ -173,12 +173,9 @@ static void test_max_message_length_on_request(grpc_end2end_test_config config,
   f = begin_test(config, "test_max_request_message_length", client_args,
                  server_args);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    if (client_args != nullptr)
-      grpc_channel_args_destroy(&exec_ctx, client_args);
-    if (server_args != nullptr)
-      grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    if (client_args != nullptr) grpc_channel_args_destroy(client_args);
+    if (server_args != nullptr) grpc_channel_args_destroy(server_args);
   }
 
   cqv = cq_verifier_create(f.cq);
@@ -366,12 +363,9 @@ static void test_max_message_length_on_response(grpc_end2end_test_config config,
   f = begin_test(config, "test_max_response_message_length", client_args,
                  server_args);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    if (client_args != nullptr)
-      grpc_channel_args_destroy(&exec_ctx, client_args);
-    if (server_args != nullptr)
-      grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    if (client_args != nullptr) grpc_channel_args_destroy(client_args);
+    if (server_args != nullptr) grpc_channel_args_destroy(server_args);
   }
   cqv = cq_verifier_create(f.cq);
 
diff --git a/test/core/end2end/tests/stream_compression_compressed_payload.cc b/test/core/end2end/tests/stream_compression_compressed_payload.cc
index d73346468a..ec3050ad45 100644
--- a/test/core/end2end/tests/stream_compression_compressed_payload.cc
+++ b/test/core/end2end/tests/stream_compression_compressed_payload.cc
@@ -129,10 +129,9 @@ static void request_for_disabled_algorithm(
   server_args = grpc_channel_args_set_stream_compression_algorithm(
       nullptr, GRPC_STREAM_COMPRESS_NONE);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     server_args = grpc_channel_args_stream_compression_algorithm_set_state(
-        &exec_ctx, &server_args, algorithm_to_disable, false);
-    grpc_exec_ctx_finish(&exec_ctx);
+        &server_args, algorithm_to_disable, false);
   }
 
   f = begin_test(config, test_name, client_args, server_args);
@@ -258,10 +257,9 @@ static void request_for_disabled_algorithm(
   grpc_byte_buffer_destroy(request_payload_recv);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 
   end_test(&f);
@@ -547,10 +545,9 @@ static void request_with_payload_template(
   cq_verifier_destroy(cqv);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 
   end_test(&f);
diff --git a/test/core/end2end/tests/stream_compression_payload.cc b/test/core/end2end/tests/stream_compression_payload.cc
index 924961ea55..b95e6528cd 100644
--- a/test/core/end2end/tests/stream_compression_payload.cc
+++ b/test/core/end2end/tests/stream_compression_payload.cc
@@ -277,10 +277,9 @@ static void test_invoke_request_response_with_payload(
   end_test(&f);
   config.tear_down_data(&f);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 }
 
diff --git a/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc b/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc
index d3b526f04e..2a8799ee67 100644
--- a/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc
+++ b/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc
@@ -275,10 +275,9 @@ static void test_pingpong_streaming(grpc_end2end_test_config config,
   end_test(&f);
   config.tear_down_data(&f);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 }
 
diff --git a/test/core/end2end/tests/workaround_cronet_compression.cc b/test/core/end2end/tests/workaround_cronet_compression.cc
index bc4d5079d8..d4decce0aa 100644
--- a/test/core/end2end/tests/workaround_cronet_compression.cc
+++ b/test/core/end2end/tests/workaround_cronet_compression.cc
@@ -142,15 +142,14 @@ static void request_with_payload_template(
       nullptr, default_server_channel_compression_algorithm);
 
   if (user_agent_override) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_channel_args* client_args_old = client_args;
     grpc_arg arg;
     arg.key = const_cast<char*>(GRPC_ARG_PRIMARY_USER_AGENT_STRING);
     arg.type = GRPC_ARG_STRING;
     arg.value.string = user_agent_override;
     client_args = grpc_channel_args_copy_and_add(client_args_old, &arg, 1);
-    grpc_channel_args_destroy(&exec_ctx, client_args_old);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_channel_args_destroy(client_args_old);
   }
 
   f = begin_test(config, test_name, client_args, server_args);
@@ -351,10 +350,9 @@ static void request_with_payload_template(
   cq_verifier_destroy(cqv);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 
   end_test(&f);
diff --git a/test/core/handshake/client_ssl.cc b/test/core/handshake/client_ssl.cc
index 2b149a73b3..2302e3da2f 100644
--- a/test/core/handshake/client_ssl.cc
+++ b/test/core/handshake/client_ssl.cc
@@ -231,7 +231,8 @@ static bool client_ssl_test(char* server_alpn_preferred) {
   gpr_thd_id thdid;
   gpr_thd_options_set_joinable(&thdopt);
   server_args args = {server_socket, server_alpn_preferred};
-  GPR_ASSERT(gpr_thd_new(&thdid, server_thread, &args, &thdopt));
+  GPR_ASSERT(gpr_thd_new(&thdid, "grpc_client_ssl_test", server_thread, &args,
+                         &thdopt));
 
   // Load key pair and establish client SSL credentials.
   grpc_ssl_pem_key_cert_pair pem_key_cert_pair;
diff --git a/test/core/handshake/readahead_handshaker_server_ssl.cc b/test/core/handshake/readahead_handshaker_server_ssl.cc
index 2810082837..599e0e16e2 100644
--- a/test/core/handshake/readahead_handshaker_server_ssl.cc
+++ b/test/core/handshake/readahead_handshaker_server_ssl.cc
@@ -49,41 +49,37 @@
  * to the security_handshaker). This test is meant to protect code relying on
  * this functionality that lives outside of this repo. */
 
-static void readahead_handshaker_destroy(grpc_exec_ctx* ctx,
-                                         grpc_handshaker* handshaker) {
+static void readahead_handshaker_destroy(grpc_handshaker* handshaker) {
   gpr_free(handshaker);
 }
 
-static void readahead_handshaker_shutdown(grpc_exec_ctx* ctx,
-                                          grpc_handshaker* handshaker,
+static void readahead_handshaker_shutdown(grpc_handshaker* handshaker,
                                           grpc_error* error) {}
 
 static void readahead_handshaker_do_handshake(
-    grpc_exec_ctx* ctx, grpc_handshaker* handshaker,
-    grpc_tcp_server_acceptor* acceptor, grpc_closure* on_handshake_done,
-    grpc_handshaker_args* args) {
-  grpc_endpoint_read(ctx, args->endpoint, args->read_buffer, on_handshake_done);
+    grpc_handshaker* handshaker, grpc_tcp_server_acceptor* acceptor,
+    grpc_closure* on_handshake_done, grpc_handshaker_args* args) {
+  grpc_endpoint_read(args->endpoint, args->read_buffer, on_handshake_done);
 }
 
 const grpc_handshaker_vtable readahead_handshaker_vtable = {
     readahead_handshaker_destroy, readahead_handshaker_shutdown,
     readahead_handshaker_do_handshake};
 
-static grpc_handshaker* readahead_handshaker_create(grpc_exec_ctx* ctx) {
+static grpc_handshaker* readahead_handshaker_create() {
   grpc_handshaker* h = (grpc_handshaker*)gpr_zalloc(sizeof(grpc_handshaker));
   grpc_handshaker_init(&readahead_handshaker_vtable, h);
   return h;
 }
 
 static void readahead_handshaker_factory_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* hf,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr) {
-  grpc_handshake_manager_add(handshake_mgr,
-                             readahead_handshaker_create(exec_ctx));
+    grpc_handshaker_factory* hf, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr) {
+  grpc_handshake_manager_add(handshake_mgr, readahead_handshaker_create());
 }
 
 static void readahead_handshaker_factory_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory) {}
+    grpc_handshaker_factory* handshaker_factory) {}
 
 static const grpc_handshaker_factory_vtable
     readahead_handshaker_factory_vtable = {
diff --git a/test/core/handshake/server_ssl_common.cc b/test/core/handshake/server_ssl_common.cc
index 599b2814e0..0bf453a204 100644
--- a/test/core/handshake/server_ssl_common.cc
+++ b/test/core/handshake/server_ssl_common.cc
@@ -137,7 +137,8 @@ bool server_ssl_test(const char* alpn_list[], unsigned int alpn_list_len,
   gpr_thd_options thdopt = gpr_thd_options_default();
   gpr_thd_id thdid;
   gpr_thd_options_set_joinable(&thdopt);
-  GPR_ASSERT(gpr_thd_new(&thdid, server_thread, &port, &thdopt));
+  GPR_ASSERT(
+      gpr_thd_new(&thdid, "grpc_ssl_test", server_thread, &port, &thdopt));
 
   SSL_load_error_strings();
   OpenSSL_add_ssl_algorithms();
diff --git a/test/core/http/format_request_test.cc b/test/core/http/format_request_test.cc
index 684738a997..353e138b2a 100644
--- a/test/core/http/format_request_test.cc
+++ b/test/core/http/format_request_test.cc
@@ -139,11 +139,13 @@ static void test_format_post_request_content_type_override(void) {
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   test_format_get_request();
   test_format_post_request();
   test_format_post_request_no_body();
   test_format_post_request_content_type_override();
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/http/httpcli_test.cc b/test/core/http/httpcli_test.cc
index 81e9374819..259e3aa463 100644
--- a/test/core/http/httpcli_test.cc
+++ b/test/core/http/httpcli_test.cc
@@ -40,7 +40,7 @@ static grpc_millis n_seconds_time(int seconds) {
       grpc_timeout_seconds_to_deadline(seconds));
 }
 
-static void on_finish(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_finish(void* arg, grpc_error* error) {
   const char* expect =
       "<html><head><title>Hello world!</title></head>"
       "<body><p>This is a test</p></body></html>";
@@ -53,15 +53,14 @@ static void on_finish(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
   g_done = 1;
   GPR_ASSERT(GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                        nullptr)));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&g_pops), nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
 static void test_get(int port) {
   grpc_httpcli_request req;
   char* host;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   g_done = 0;
   gpr_log(GPR_INFO, "test_get");
@@ -78,19 +77,18 @@ static void test_get(int port) {
   memset(&response, 0, sizeof(response));
   grpc_resource_quota* resource_quota = grpc_resource_quota_create("test_get");
   grpc_httpcli_get(
-      &exec_ctx, &g_context, &g_pops, resource_quota, &req, n_seconds_time(15),
+      &g_context, &g_pops, resource_quota, &req, n_seconds_time(15),
       GRPC_CLOSURE_CREATE(on_finish, &response, grpc_schedule_on_exec_ctx),
       &response);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
   gpr_mu_lock(g_mu);
   while (!g_done) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                          &worker, n_seconds_time(1))));
+        "pollset_work", grpc_pollset_work(grpc_polling_entity_pollset(&g_pops),
+                                          &worker, n_seconds_time(1))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
@@ -101,7 +99,7 @@ static void test_get(int port) {
 static void test_post(int port) {
   grpc_httpcli_request req;
   char* host;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   g_done = 0;
   gpr_log(GPR_INFO, "test_post");
@@ -118,20 +116,18 @@ static void test_post(int port) {
   memset(&response, 0, sizeof(response));
   grpc_resource_quota* resource_quota = grpc_resource_quota_create("test_post");
   grpc_httpcli_post(
-      &exec_ctx, &g_context, &g_pops, resource_quota, &req, "hello", 5,
-      n_seconds_time(15),
+      &g_context, &g_pops, resource_quota, &req, "hello", 5, n_seconds_time(15),
       GRPC_CLOSURE_CREATE(on_finish, &response, grpc_schedule_on_exec_ctx),
       &response);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
   gpr_mu_lock(g_mu);
   while (!g_done) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                          &worker, n_seconds_time(1))));
+        "pollset_work", grpc_pollset_work(grpc_polling_entity_pollset(&g_pops),
+                                          &worker, n_seconds_time(1))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
@@ -139,69 +135,69 @@ static void test_post(int port) {
   grpc_http_response_destroy(&response);
 }
 
-static void destroy_pops(grpc_exec_ctx* exec_ctx, void* p, grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, grpc_polling_entity_pollset(
-                                     static_cast<grpc_polling_entity*>(p)));
+static void destroy_pops(void* p, grpc_error* error) {
+  grpc_pollset_destroy(
+      grpc_polling_entity_pollset(static_cast<grpc_polling_entity*>(p)));
 }
 
 int main(int argc, char** argv) {
-  grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   gpr_subprocess* server;
-  char* me = argv[0];
-  char* lslash = strrchr(me, '/');
-  char* args[4];
-  int port = grpc_pick_unused_port_or_die();
-  int arg_shift = 0;
-  /* figure out where we are */
-  char* root;
-  if (lslash) {
-    root = static_cast<char*>(gpr_malloc((size_t)(lslash - me + 1)));
-    memcpy(root, me, (size_t)(lslash - me));
-    root[lslash - me] = 0;
-  } else {
-    root = gpr_strdup(".");
-  }
-
-  GPR_ASSERT(argc <= 2);
-  if (argc == 2) {
-    args[0] = gpr_strdup(argv[1]);
-  } else {
-    arg_shift = 1;
-    gpr_asprintf(&args[0], "%s/../../tools/distrib/python_wrapper.sh", root);
-    gpr_asprintf(&args[1], "%s/../../test/core/http/test_server.py", root);
-  }
-
-  /* start the server */
-  args[1 + arg_shift] = const_cast<char*>("--port");
-  gpr_asprintf(&args[2 + arg_shift], "%d", port);
-  server = gpr_subprocess_create(3 + arg_shift, (const char**)args);
-  GPR_ASSERT(server);
-  gpr_free(args[0]);
-  if (arg_shift) gpr_free(args[1]);
-  gpr_free(args[2 + arg_shift]);
-  gpr_free(root);
-
-  gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
-                               gpr_time_from_seconds(5, GPR_TIMESPAN)));
-
   grpc_test_init(argc, argv);
   grpc_init();
-  grpc_httpcli_context_init(&g_context);
-  grpc_pollset* pollset =
-      static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
-  grpc_pollset_init(pollset, &g_mu);
-  g_pops = grpc_polling_entity_create_from_pollset(pollset);
-
-  test_get(port);
-  test_post(port);
-
-  grpc_httpcli_context_destroy(&exec_ctx, &g_context);
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pops, &g_pops,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                        &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_closure destroyed;
+    grpc_core::ExecCtx exec_ctx;
+    char* me = argv[0];
+    char* lslash = strrchr(me, '/');
+    char* args[4];
+    int port = grpc_pick_unused_port_or_die();
+    int arg_shift = 0;
+    /* figure out where we are */
+    char* root;
+    if (lslash) {
+      root = static_cast<char*>(gpr_malloc((size_t)(lslash - me + 1)));
+      memcpy(root, me, (size_t)(lslash - me));
+      root[lslash - me] = 0;
+    } else {
+      root = gpr_strdup(".");
+    }
+
+    GPR_ASSERT(argc <= 2);
+    if (argc == 2) {
+      args[0] = gpr_strdup(argv[1]);
+    } else {
+      arg_shift = 1;
+      gpr_asprintf(&args[0], "%s/../../tools/distrib/python_wrapper.sh", root);
+      gpr_asprintf(&args[1], "%s/../../test/core/http/test_server.py", root);
+    }
+
+    /* start the server */
+    args[1 + arg_shift] = const_cast<char*>("--port");
+    gpr_asprintf(&args[2 + arg_shift], "%d", port);
+    server = gpr_subprocess_create(3 + arg_shift, (const char**)args);
+    GPR_ASSERT(server);
+    gpr_free(args[0]);
+    if (arg_shift) gpr_free(args[1]);
+    gpr_free(args[2 + arg_shift]);
+    gpr_free(root);
+
+    gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+                                 gpr_time_from_seconds(5, GPR_TIMESPAN)));
+
+    grpc_httpcli_context_init(&g_context);
+    grpc_pollset* pollset =
+        static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
+    grpc_pollset_init(pollset, &g_mu);
+    g_pops = grpc_polling_entity_create_from_pollset(pollset);
+
+    test_get(port);
+    test_post(port);
+
+    grpc_httpcli_context_destroy(&g_context);
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pops, &g_pops,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(grpc_polling_entity_pollset(&g_pops), &destroyed);
+  }
   grpc_shutdown();
 
   gpr_free(grpc_polling_entity_pollset(&g_pops));
diff --git a/test/core/http/httpscli_test.cc b/test/core/http/httpscli_test.cc
index da8405c049..adf69f1b16 100644
--- a/test/core/http/httpscli_test.cc
+++ b/test/core/http/httpscli_test.cc
@@ -40,7 +40,7 @@ static grpc_millis n_seconds_time(int seconds) {
       grpc_timeout_seconds_to_deadline(seconds));
 }
 
-static void on_finish(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_finish(void* arg, grpc_error* error) {
   const char* expect =
       "<html><head><title>Hello world!</title></head>"
       "<body><p>This is a test</p></body></html>";
@@ -53,15 +53,14 @@ static void on_finish(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
   g_done = 1;
   GPR_ASSERT(GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                        nullptr)));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&g_pops), nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
 static void test_get(int port) {
   grpc_httpcli_request req;
   char* host;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   g_done = 0;
   gpr_log(GPR_INFO, "test_get");
@@ -79,19 +78,18 @@ static void test_get(int port) {
   memset(&response, 0, sizeof(response));
   grpc_resource_quota* resource_quota = grpc_resource_quota_create("test_get");
   grpc_httpcli_get(
-      &exec_ctx, &g_context, &g_pops, resource_quota, &req, n_seconds_time(15),
+      &g_context, &g_pops, resource_quota, &req, n_seconds_time(15),
       GRPC_CLOSURE_CREATE(on_finish, &response, grpc_schedule_on_exec_ctx),
       &response);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
   gpr_mu_lock(g_mu);
   while (!g_done) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                          &worker, n_seconds_time(1))));
+        "pollset_work", grpc_pollset_work(grpc_polling_entity_pollset(&g_pops),
+                                          &worker, n_seconds_time(1))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
@@ -102,7 +100,7 @@ static void test_get(int port) {
 static void test_post(int port) {
   grpc_httpcli_request req;
   char* host;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   g_done = 0;
   gpr_log(GPR_INFO, "test_post");
@@ -120,20 +118,18 @@ static void test_post(int port) {
   memset(&response, 0, sizeof(response));
   grpc_resource_quota* resource_quota = grpc_resource_quota_create("test_post");
   grpc_httpcli_post(
-      &exec_ctx, &g_context, &g_pops, resource_quota, &req, "hello", 5,
-      n_seconds_time(15),
+      &g_context, &g_pops, resource_quota, &req, "hello", 5, n_seconds_time(15),
       GRPC_CLOSURE_CREATE(on_finish, &response, grpc_schedule_on_exec_ctx),
       &response);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
   gpr_mu_lock(g_mu);
   while (!g_done) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                          &worker, n_seconds_time(1))));
+        "pollset_work", grpc_pollset_work(grpc_polling_entity_pollset(&g_pops),
+                                          &worker, n_seconds_time(1))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
@@ -141,14 +137,13 @@ static void test_post(int port) {
   grpc_http_response_destroy(&response);
 }
 
-static void destroy_pops(grpc_exec_ctx* exec_ctx, void* p, grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, grpc_polling_entity_pollset(
-                                     static_cast<grpc_polling_entity*>(p)));
+static void destroy_pops(void* p, grpc_error* error) {
+  grpc_pollset_destroy(
+      grpc_polling_entity_pollset(static_cast<grpc_polling_entity*>(p)));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   gpr_subprocess* server;
   char* me = argv[0];
   char* lslash = strrchr(me, '/');
@@ -199,12 +194,13 @@ int main(int argc, char** argv) {
   test_get(port);
   test_post(port);
 
-  grpc_httpcli_context_destroy(&exec_ctx, &g_context);
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pops, &g_pops,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                        &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_httpcli_context_destroy(&g_context);
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pops, &g_pops,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(grpc_polling_entity_pollset(&g_pops), &destroyed);
+  }
   grpc_shutdown();
 
   gpr_free(grpc_polling_entity_pollset(&g_pops));
diff --git a/test/core/http/parser_test.cc b/test/core/http/parser_test.cc
index 0b60e369b7..18f19856bd 100644
--- a/test/core/http/parser_test.cc
+++ b/test/core/http/parser_test.cc
@@ -21,6 +21,7 @@
 #include <stdarg.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
@@ -217,6 +218,7 @@ int main(int argc, char** argv) {
   char *tmp1, *tmp2;
 
   grpc_test_init(argc, argv);
+  grpc_init();
 
   for (i = 0; i < GPR_ARRAY_SIZE(split_modes); i++) {
     test_succeeds(split_modes[i],
@@ -300,5 +302,6 @@ int main(int argc, char** argv) {
     gpr_free(tmp2);
   }
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/http/request_fuzzer.cc b/test/core/http/request_fuzzer.cc
index 368ac1b49d..9798cfb33c 100644
--- a/test/core/http/request_fuzzer.cc
+++ b/test/core/http/request_fuzzer.cc
@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/lib/http/parser.h"
@@ -30,6 +31,7 @@ bool leak_check = true;
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_http_parser parser;
   grpc_http_request request;
+  grpc_init();
   memset(&request, 0, sizeof(request));
   grpc_http_parser_init(&parser, GRPC_HTTP_REQUEST, &request);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
@@ -38,5 +40,6 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_slice_unref(slice);
   grpc_http_parser_destroy(&parser);
   grpc_http_request_destroy(&request);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/http/response_fuzzer.cc b/test/core/http/response_fuzzer.cc
index 2a793fddd4..fc0904b1db 100644
--- a/test/core/http/response_fuzzer.cc
+++ b/test/core/http/response_fuzzer.cc
@@ -19,6 +19,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/lib/http/parser.h"
@@ -29,6 +30,7 @@ bool leak_check = true;
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_http_parser parser;
   grpc_http_response response;
+  grpc_init();
   memset(&response, 0, sizeof(response));
   grpc_http_parser_init(&parser, GRPC_HTTP_RESPONSE, &response);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
@@ -37,5 +39,6 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_slice_unref(slice);
   grpc_http_parser_destroy(&parser);
   grpc_http_response_destroy(&response);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/combiner_test.cc b/test/core/iomgr/combiner_test.cc
index 146a6bd553..891008c774 100644
--- a/test/core/iomgr/combiner_test.cc
+++ b/test/core/iomgr/combiner_test.cc
@@ -28,13 +28,11 @@
 
 static void test_no_op(void) {
   gpr_log(GPR_DEBUG, "test_no_op");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_COMBINER_UNREF(&exec_ctx, grpc_combiner_create(), "test_no_op");
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_COMBINER_UNREF(grpc_combiner_create(), "test_no_op");
 }
 
-static void set_event_to_true(grpc_exec_ctx* exec_ctx, void* value,
-                              grpc_error* error) {
+static void set_event_to_true(void* value, grpc_error* error) {
   gpr_event_set(static_cast<gpr_event*>(value), (void*)1);
 }
 
@@ -44,16 +42,14 @@ static void test_execute_one(void) {
   grpc_combiner* lock = grpc_combiner_create();
   gpr_event done;
   gpr_event_init(&done);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_CLOSURE_SCHED(&exec_ctx,
-                     GRPC_CLOSURE_CREATE(set_event_to_true, &done,
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(set_event_to_true, &done,
                                          grpc_combiner_scheduler(lock)),
                      GRPC_ERROR_NONE);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(gpr_event_wait(&done, grpc_timeout_seconds_to_deadline(5)) !=
              nullptr);
-  GRPC_COMBINER_UNREF(&exec_ctx, lock, "test_execute_one");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(lock, "test_execute_one");
 }
 
 typedef struct {
@@ -67,7 +63,7 @@ typedef struct {
   size_t value;
 } ex_args;
 
-static void check_one(grpc_exec_ctx* exec_ctx, void* a, grpc_error* error) {
+static void check_one(void* a, grpc_error* error) {
   ex_args* args = static_cast<ex_args*>(a);
   GPR_ASSERT(*args->ctr == args->value - 1);
   *args->ctr = args->value;
@@ -76,28 +72,25 @@ static void check_one(grpc_exec_ctx* exec_ctx, void* a, grpc_error* error) {
 
 static void execute_many_loop(void* a) {
   thd_args* args = static_cast<thd_args*>(a);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   size_t n = 1;
   for (size_t i = 0; i < 10; i++) {
     for (size_t j = 0; j < 10000; j++) {
       ex_args* c = static_cast<ex_args*>(gpr_malloc(sizeof(*c)));
       c->ctr = &args->ctr;
       c->value = n++;
-      GRPC_CLOSURE_SCHED(&exec_ctx,
-                         GRPC_CLOSURE_CREATE(
+      GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(
                              check_one, c, grpc_combiner_scheduler(args->lock)),
                          GRPC_ERROR_NONE);
-      grpc_exec_ctx_flush(&exec_ctx);
+      grpc_core::ExecCtx::Get()->Flush();
     }
     // sleep for a little bit, to test a combiner draining and another thread
     // picking it up
     gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(100));
   }
-  GRPC_CLOSURE_SCHED(&exec_ctx,
-                     GRPC_CLOSURE_CREATE(set_event_to_true, &args->done,
+  GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(set_event_to_true, &args->done,
                                          grpc_combiner_scheduler(args->lock)),
                      GRPC_ERROR_NONE);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_execute_many(void) {
@@ -112,27 +105,26 @@ static void test_execute_many(void) {
     ta[i].ctr = 0;
     ta[i].lock = lock;
     gpr_event_init(&ta[i].done);
-    GPR_ASSERT(gpr_thd_new(&thds[i], execute_many_loop, &ta[i], &options));
+    GPR_ASSERT(gpr_thd_new(&thds[i], "grpc_execute_many", execute_many_loop,
+                           &ta[i], &options));
   }
   for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
     GPR_ASSERT(gpr_event_wait(&ta[i].done,
                               gpr_inf_future(GPR_CLOCK_REALTIME)) != nullptr);
     gpr_thd_join(thds[i]);
   }
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_COMBINER_UNREF(&exec_ctx, lock, "test_execute_many");
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_COMBINER_UNREF(lock, "test_execute_many");
 }
 
 static gpr_event got_in_finally;
 
-static void in_finally(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void in_finally(void* arg, grpc_error* error) {
   gpr_event_set(&got_in_finally, (void*)1);
 }
 
-static void add_finally(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
-  GRPC_CLOSURE_SCHED(exec_ctx,
-                     GRPC_CLOSURE_CREATE(in_finally, arg,
+static void add_finally(void* arg, grpc_error* error) {
+  GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(in_finally, arg,
                                          grpc_combiner_finally_scheduler(
                                              static_cast<grpc_combiner*>(arg))),
                      GRPC_ERROR_NONE);
@@ -142,17 +134,15 @@ static void test_execute_finally(void) {
   gpr_log(GPR_DEBUG, "test_execute_finally");
 
   grpc_combiner* lock = grpc_combiner_create();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_event_init(&got_in_finally);
   GRPC_CLOSURE_SCHED(
-      &exec_ctx,
       GRPC_CLOSURE_CREATE(add_finally, lock, grpc_combiner_scheduler(lock)),
       GRPC_ERROR_NONE);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(gpr_event_wait(&got_in_finally,
                             grpc_timeout_seconds_to_deadline(5)) != nullptr);
-  GRPC_COMBINER_UNREF(&exec_ctx, lock, "test_execute_finally");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(lock, "test_execute_finally");
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/iomgr/endpoint_pair_test.cc b/test/core/iomgr/endpoint_pair_test.cc
index 30a0cb5924..90dd40d9c4 100644
--- a/test/core/iomgr/endpoint_pair_test.cc
+++ b/test/core/iomgr/endpoint_pair_test.cc
@@ -32,7 +32,7 @@ static void clean_up(void) {}
 
 static grpc_endpoint_test_fixture create_fixture_endpoint_pair(
     size_t slice_size) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_test_fixture f;
   grpc_arg a[1];
   a[0].key = const_cast<char*>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
@@ -43,9 +43,8 @@ static grpc_endpoint_test_fixture create_fixture_endpoint_pair(
 
   f.client_ep = p.client;
   f.server_ep = p.server;
-  grpc_endpoint_add_to_pollset(&exec_ctx, f.client_ep, g_pollset);
-  grpc_endpoint_add_to_pollset(&exec_ctx, f.server_ep, g_pollset);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_endpoint_add_to_pollset(f.client_ep, g_pollset);
+  grpc_endpoint_add_to_pollset(f.server_ep, g_pollset);
 
   return f;
 }
@@ -54,23 +53,23 @@ static grpc_endpoint_test_config configs[] = {
     {"tcp/tcp_socketpair", create_fixture_endpoint_pair, clean_up},
 };
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
-  grpc_pollset_init(g_pollset, &g_mu);
-  grpc_endpoint_tests(configs[0], g_pollset, g_mu);
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
+    grpc_pollset_init(g_pollset, &g_mu);
+    grpc_endpoint_tests(configs[0], g_pollset, g_mu);
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
+  }
   grpc_shutdown();
   gpr_free(g_pollset);
 
diff --git a/test/core/iomgr/endpoint_tests.cc b/test/core/iomgr/endpoint_tests.cc
index 026e34105d..8ccae52067 100644
--- a/test/core/iomgr/endpoint_tests.cc
+++ b/test/core/iomgr/endpoint_tests.cc
@@ -115,8 +115,7 @@ struct read_and_write_test_state {
   grpc_closure done_write;
 };
 
-static void read_and_write_test_read_handler(grpc_exec_ctx* exec_ctx,
-                                             void* data, grpc_error* error) {
+static void read_and_write_test_read_handler(void* data, grpc_error* error) {
   struct read_and_write_test_state* state =
       (struct read_and_write_test_state*)data;
 
@@ -126,17 +125,14 @@ static void read_and_write_test_read_handler(grpc_exec_ctx* exec_ctx,
     gpr_log(GPR_INFO, "Read handler done");
     gpr_mu_lock(g_mu);
     state->read_done = 1 + (error == GRPC_ERROR_NONE);
-    GRPC_LOG_IF_ERROR("pollset_kick",
-                      grpc_pollset_kick(exec_ctx, g_pollset, nullptr));
+    GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr));
     gpr_mu_unlock(g_mu);
   } else if (error == GRPC_ERROR_NONE) {
-    grpc_endpoint_read(exec_ctx, state->read_ep, &state->incoming,
-                       &state->done_read);
+    grpc_endpoint_read(state->read_ep, &state->incoming, &state->done_read);
   }
 }
 
-static void read_and_write_test_write_handler(grpc_exec_ctx* exec_ctx,
-                                              void* data, grpc_error* error) {
+static void read_and_write_test_write_handler(void* data, grpc_error* error) {
   struct read_and_write_test_state* state =
       (struct read_and_write_test_state*)data;
   grpc_slice* slices = nullptr;
@@ -153,7 +149,7 @@ static void read_and_write_test_write_handler(grpc_exec_ctx* exec_ctx,
                                &state->current_write_data);
       grpc_slice_buffer_reset_and_unref(&state->outgoing);
       grpc_slice_buffer_addn(&state->outgoing, slices, nslices);
-      grpc_endpoint_write(exec_ctx, state->write_ep, &state->outgoing,
+      grpc_endpoint_write(state->write_ep, &state->outgoing,
                           &state->done_write);
       gpr_free(slices);
       return;
@@ -163,8 +159,7 @@ static void read_and_write_test_write_handler(grpc_exec_ctx* exec_ctx,
   gpr_log(GPR_INFO, "Write handler done");
   gpr_mu_lock(g_mu);
   state->write_done = 1 + (error == GRPC_ERROR_NONE);
-  GRPC_LOG_IF_ERROR("pollset_kick",
-                    grpc_pollset_kick(exec_ctx, g_pollset, nullptr));
+  GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr));
   gpr_mu_unlock(g_mu);
 }
 
@@ -178,7 +173,7 @@ static void read_and_write_test(grpc_endpoint_test_config config,
   struct read_and_write_test_state state;
   grpc_endpoint_test_fixture f =
       begin_test(config, "read_and_write_test", slice_size);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(20));
   gpr_log(GPR_DEBUG,
@@ -217,66 +212,57 @@ static void read_and_write_test(grpc_endpoint_test_config config,
      for the first iteration as for later iterations. It does the right thing
      even when bytes_written is unsigned. */
   state.bytes_written -= state.current_write_size;
-  read_and_write_test_write_handler(&exec_ctx, &state, GRPC_ERROR_NONE);
-  grpc_exec_ctx_flush(&exec_ctx);
+  read_and_write_test_write_handler(&state, GRPC_ERROR_NONE);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  grpc_endpoint_read(&exec_ctx, state.read_ep, &state.incoming,
-                     &state.done_read);
+  grpc_endpoint_read(state.read_ep, &state.incoming, &state.done_read);
 
   if (shutdown) {
     gpr_log(GPR_DEBUG, "shutdown read");
     grpc_endpoint_shutdown(
-        &exec_ctx, state.read_ep,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
+        state.read_ep, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
     gpr_log(GPR_DEBUG, "shutdown write");
     grpc_endpoint_shutdown(
-        &exec_ctx, state.write_ep,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
+        state.write_ep, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
   }
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   gpr_mu_lock(g_mu);
   while (!state.read_done || !state.write_done) {
     grpc_pollset_worker* worker = nullptr;
-    GPR_ASSERT(grpc_exec_ctx_now(&exec_ctx) < deadline);
+    GPR_ASSERT(grpc_core::ExecCtx::Get()->Now() < deadline);
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
   }
   gpr_mu_unlock(g_mu);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   end_test(config);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.outgoing);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.incoming);
-  grpc_endpoint_destroy(&exec_ctx, state.read_ep);
-  grpc_endpoint_destroy(&exec_ctx, state.write_ep);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_buffer_destroy_internal(&state.outgoing);
+  grpc_slice_buffer_destroy_internal(&state.incoming);
+  grpc_endpoint_destroy(state.read_ep);
+  grpc_endpoint_destroy(state.write_ep);
 }
 
-static void inc_on_failure(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
+static void inc_on_failure(void* arg, grpc_error* error) {
   gpr_mu_lock(g_mu);
   *(int*)arg += (error != GRPC_ERROR_NONE);
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
-static void wait_for_fail_count(grpc_exec_ctx* exec_ctx, int* fail_count,
-                                int want_fail_count) {
-  grpc_exec_ctx_flush(exec_ctx);
+static void wait_for_fail_count(int* fail_count, int want_fail_count) {
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_mu_lock(g_mu);
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(10));
-  while (grpc_exec_ctx_now(exec_ctx) < deadline &&
+  while (grpc_core::ExecCtx::Get()->Now() < deadline &&
          *fail_count < want_fail_count) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
   GPR_ASSERT(*fail_count == want_fail_count);
@@ -291,33 +277,32 @@ static void multiple_shutdown_test(grpc_endpoint_test_config config) {
   grpc_slice_buffer slice_buffer;
   grpc_slice_buffer_init(&slice_buffer);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_endpoint_add_to_pollset(&exec_ctx, f.client_ep, g_pollset);
-  grpc_endpoint_read(&exec_ctx, f.client_ep, &slice_buffer,
+  grpc_core::ExecCtx exec_ctx;
+  grpc_endpoint_add_to_pollset(f.client_ep, g_pollset);
+  grpc_endpoint_read(f.client_ep, &slice_buffer,
                      GRPC_CLOSURE_CREATE(inc_on_failure, &fail_count,
                                          grpc_schedule_on_exec_ctx));
-  wait_for_fail_count(&exec_ctx, &fail_count, 0);
-  grpc_endpoint_shutdown(&exec_ctx, f.client_ep,
+  wait_for_fail_count(&fail_count, 0);
+  grpc_endpoint_shutdown(f.client_ep,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
-  wait_for_fail_count(&exec_ctx, &fail_count, 1);
-  grpc_endpoint_read(&exec_ctx, f.client_ep, &slice_buffer,
+  wait_for_fail_count(&fail_count, 1);
+  grpc_endpoint_read(f.client_ep, &slice_buffer,
                      GRPC_CLOSURE_CREATE(inc_on_failure, &fail_count,
                                          grpc_schedule_on_exec_ctx));
-  wait_for_fail_count(&exec_ctx, &fail_count, 2);
+  wait_for_fail_count(&fail_count, 2);
   grpc_slice_buffer_add(&slice_buffer, grpc_slice_from_copied_string("a"));
-  grpc_endpoint_write(&exec_ctx, f.client_ep, &slice_buffer,
+  grpc_endpoint_write(f.client_ep, &slice_buffer,
                       GRPC_CLOSURE_CREATE(inc_on_failure, &fail_count,
                                           grpc_schedule_on_exec_ctx));
-  wait_for_fail_count(&exec_ctx, &fail_count, 3);
-  grpc_endpoint_shutdown(&exec_ctx, f.client_ep,
+  wait_for_fail_count(&fail_count, 3);
+  grpc_endpoint_shutdown(f.client_ep,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
-  wait_for_fail_count(&exec_ctx, &fail_count, 3);
+  wait_for_fail_count(&fail_count, 3);
 
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &slice_buffer);
+  grpc_slice_buffer_destroy_internal(&slice_buffer);
 
-  grpc_endpoint_destroy(&exec_ctx, f.client_ep);
-  grpc_endpoint_destroy(&exec_ctx, f.server_ep);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_endpoint_destroy(f.client_ep);
+  grpc_endpoint_destroy(f.server_ep);
 }
 
 void grpc_endpoint_tests(grpc_endpoint_test_config config,
diff --git a/test/core/iomgr/ev_epollsig_linux_test.cc b/test/core/iomgr/ev_epollsig_linux_test.cc
index ac8b2f43d1..e767e01f21 100644
--- a/test/core/iomgr/ev_epollsig_linux_test.cc
+++ b/test/core/iomgr/ev_epollsig_linux_test.cc
@@ -70,19 +70,18 @@ static void test_fd_init(test_fd* tfds, int* fds, int num_fds) {
   }
 }
 
-static void test_fd_cleanup(grpc_exec_ctx* exec_ctx, test_fd* tfds,
-                            int num_fds) {
+static void test_fd_cleanup(test_fd* tfds, int num_fds) {
   int release_fd;
   int i;
 
   for (i = 0; i < num_fds; i++) {
-    grpc_fd_shutdown(exec_ctx, tfds[i].fd,
+    grpc_fd_shutdown(tfds[i].fd,
                      GRPC_ERROR_CREATE_FROM_STATIC_STRING("test_fd_cleanup"));
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
 
-    grpc_fd_orphan(exec_ctx, tfds[i].fd, nullptr, &release_fd,
-                   false /* already_closed */, "test_fd_cleanup");
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_fd_orphan(tfds[i].fd, nullptr, &release_fd, false /* already_closed */,
+                   "test_fd_cleanup");
+    grpc_core::ExecCtx::Get()->Flush();
 
     GPR_ASSERT(release_fd == tfds[i].inner_fd);
     close(tfds[i].inner_fd);
@@ -98,22 +97,20 @@ static void test_pollset_init(test_pollset* pollsets, int num_pollsets) {
   }
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, (grpc_pollset*)p);
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy((grpc_pollset*)p);
 }
 
-static void test_pollset_cleanup(grpc_exec_ctx* exec_ctx,
-                                 test_pollset* pollsets, int num_pollsets) {
+static void test_pollset_cleanup(test_pollset* pollsets, int num_pollsets) {
   grpc_closure destroyed;
   int i;
 
   for (i = 0; i < num_pollsets; i++) {
     GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, pollsets[i].pollset,
                       grpc_schedule_on_exec_ctx);
-    grpc_pollset_shutdown(exec_ctx, pollsets[i].pollset, &destroyed);
+    grpc_pollset_shutdown(pollsets[i].pollset, &destroyed);
 
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_free(pollsets[i].pollset);
   }
 }
@@ -133,7 +130,7 @@ static void test_pollset_cleanup(grpc_exec_ctx* exec_ctx,
 #define NUM_POLLSETS 4
 
 static void test_add_fd_to_pollset() {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   test_fd tfds[NUM_FDS];
   int fds[NUM_FDS];
   test_pollset pollsets[NUM_POLLSETS];
@@ -170,33 +167,33 @@ static void test_add_fd_to_pollset() {
 
   /* == Step 1 == */
   for (i = 0; i <= 2; i++) {
-    grpc_pollset_add_fd(&exec_ctx, pollsets[0].pollset, tfds[i].fd);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_pollset_add_fd(pollsets[0].pollset, tfds[i].fd);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   for (i = 3; i <= 4; i++) {
-    grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, tfds[i].fd);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_pollset_add_fd(pollsets[1].pollset, tfds[i].fd);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   for (i = 5; i <= 7; i++) {
-    grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, tfds[i].fd);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_pollset_add_fd(pollsets[2].pollset, tfds[i].fd);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   /* == Step 2 == */
   for (i = 0; i <= 1; i++) {
-    grpc_pollset_add_fd(&exec_ctx, pollsets[3].pollset, tfds[i].fd);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_pollset_add_fd(pollsets[3].pollset, tfds[i].fd);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   /* == Step 3 == */
-  grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, tfds[0].fd);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_pollset_add_fd(pollsets[1].pollset, tfds[0].fd);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* == Step 4 == */
-  grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, tfds[3].fd);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_pollset_add_fd(pollsets[2].pollset, tfds[3].fd);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* All polling islands are merged at this point */
 
@@ -213,9 +210,8 @@ static void test_add_fd_to_pollset() {
         expected_pi, grpc_pollset_get_polling_island(pollsets[i].pollset)));
   }
 
-  test_fd_cleanup(&exec_ctx, tfds, NUM_FDS);
-  test_pollset_cleanup(&exec_ctx, pollsets, NUM_POLLSETS);
-  grpc_exec_ctx_finish(&exec_ctx);
+  test_fd_cleanup(tfds, NUM_FDS);
+  test_pollset_cleanup(pollsets, NUM_POLLSETS);
 }
 
 #undef NUM_FDS
@@ -235,26 +231,24 @@ static __thread int thread_wakeups = 0;
 static void test_threading_loop(void* arg) {
   threading_shared* shared = static_cast<threading_shared*>(arg);
   while (thread_wakeups < 1000000) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_pollset_worker* worker;
     gpr_mu_lock(shared->mu);
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work", grpc_pollset_work(&exec_ctx, shared->pollset, &worker,
-                                          GRPC_MILLIS_INF_FUTURE)));
+        "pollset_work",
+        grpc_pollset_work(shared->pollset, &worker, GRPC_MILLIS_INF_FUTURE)));
     gpr_mu_unlock(shared->mu);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 }
 
-static void test_threading_wakeup(grpc_exec_ctx* exec_ctx, void* arg,
-                                  grpc_error* error) {
+static void test_threading_wakeup(void* arg, grpc_error* error) {
   threading_shared* shared = static_cast<threading_shared*>(arg);
   ++shared->wakeups;
   ++thread_wakeups;
   if (error == GRPC_ERROR_NONE) {
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
         "consume_wakeup", grpc_wakeup_fd_consume_wakeup(shared->wakeup_fd)));
-    grpc_fd_notify_on_read(exec_ctx, shared->wakeup_desc, &shared->on_wakeup);
+    grpc_fd_notify_on_read(shared->wakeup_desc, &shared->on_wakeup);
     GPR_ASSERT(GRPC_LOG_IF_ERROR("wakeup_next",
                                  grpc_wakeup_fd_wakeup(shared->wakeup_fd)));
   }
@@ -269,7 +263,7 @@ static void test_threading(void) {
   for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
     gpr_thd_options opt = gpr_thd_options_default();
     gpr_thd_options_set_joinable(&opt);
-    gpr_thd_new(&thds[i], test_threading_loop, &shared, &opt);
+    gpr_thd_new(&thds[i], "test_thread", test_threading_loop, &shared, &opt);
   }
   grpc_wakeup_fd fd;
   GPR_ASSERT(GRPC_LOG_IF_ERROR("wakeup_fd_init", grpc_wakeup_fd_init(&fd)));
@@ -277,13 +271,12 @@ static void test_threading(void) {
   shared.wakeup_desc = grpc_fd_create(fd.read_fd, "wakeup");
   shared.wakeups = 0;
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_pollset_add_fd(&exec_ctx, shared.pollset, shared.wakeup_desc);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_pollset_add_fd(shared.pollset, shared.wakeup_desc);
     grpc_fd_notify_on_read(
-        &exec_ctx, shared.wakeup_desc,
+        shared.wakeup_desc,
         GRPC_CLOSURE_INIT(&shared.on_wakeup, test_threading_wakeup, &shared,
                           grpc_schedule_on_exec_ctx));
-    grpc_exec_ctx_finish(&exec_ctx);
   }
   GPR_ASSERT(GRPC_LOG_IF_ERROR("wakeup_first",
                                grpc_wakeup_fd_wakeup(shared.wakeup_fd)));
@@ -293,14 +286,13 @@ static void test_threading(void) {
   fd.read_fd = 0;
   grpc_wakeup_fd_destroy(&fd);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_fd_shutdown(&exec_ctx, shared.wakeup_desc, GRPC_ERROR_CANCELLED);
-    grpc_fd_orphan(&exec_ctx, shared.wakeup_desc, nullptr, nullptr,
+    grpc_core::ExecCtx exec_ctx;
+    grpc_fd_shutdown(shared.wakeup_desc, GRPC_ERROR_CANCELLED);
+    grpc_fd_orphan(shared.wakeup_desc, nullptr, nullptr,
                    false /* already_closed */, "done");
-    grpc_pollset_shutdown(&exec_ctx, shared.pollset,
+    grpc_pollset_shutdown(shared.pollset,
                           GRPC_CLOSURE_CREATE(destroy_pollset, shared.pollset,
                                               grpc_schedule_on_exec_ctx));
-    grpc_exec_ctx_finish(&exec_ctx);
   }
   gpr_free(shared.pollset);
 }
@@ -309,20 +301,21 @@ int main(int argc, char** argv) {
   const char* poll_strategy = nullptr;
   grpc_test_init(argc, argv);
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-
-  poll_strategy = grpc_get_poll_strategy_name();
-  if (poll_strategy != nullptr && strcmp(poll_strategy, "epollsig") == 0) {
-    test_add_fd_to_pollset();
-    test_threading();
-  } else {
-    gpr_log(GPR_INFO,
-            "Skipping the test. The test is only relevant for 'epollsig' "
-            "strategy. and the current strategy is: '%s'",
-            poll_strategy);
+  {
+    grpc_core::ExecCtx exec_ctx;
+
+    poll_strategy = grpc_get_poll_strategy_name();
+    if (poll_strategy != nullptr && strcmp(poll_strategy, "epollsig") == 0) {
+      test_add_fd_to_pollset();
+      test_threading();
+    } else {
+      gpr_log(GPR_INFO,
+              "Skipping the test. The test is only relevant for 'epollsig' "
+              "strategy. and the current strategy is: '%s'",
+              poll_strategy);
+    }
   }
 
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/fd_conservation_posix_test.cc b/test/core/iomgr/fd_conservation_posix_test.cc
index f46430c611..aaa14010f8 100644
--- a/test/core/iomgr/fd_conservation_posix_test.cc
+++ b/test/core/iomgr/fd_conservation_posix_test.cc
@@ -31,26 +31,27 @@ int main(int argc, char** argv) {
 
   grpc_test_init(argc, argv);
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-
-  /* set max # of file descriptors to a low value, and
-     verify we can create and destroy many more than this number
-     of descriptors */
-  rlim.rlim_cur = rlim.rlim_max = 10;
-  GPR_ASSERT(0 == setrlimit(RLIMIT_NOFILE, &rlim));
-  grpc_resource_quota* resource_quota =
-      grpc_resource_quota_create("fd_conservation_posix_test");
-
-  for (i = 0; i < 100; i++) {
-    p = grpc_iomgr_create_endpoint_pair("test", nullptr);
-    grpc_endpoint_destroy(&exec_ctx, p.client);
-    grpc_endpoint_destroy(&exec_ctx, p.server);
-    grpc_exec_ctx_flush(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+
+    /* set max # of file descriptors to a low value, and
+       verify we can create and destroy many more than this number
+       of descriptors */
+    rlim.rlim_cur = rlim.rlim_max = 10;
+    GPR_ASSERT(0 == setrlimit(RLIMIT_NOFILE, &rlim));
+    grpc_resource_quota* resource_quota =
+        grpc_resource_quota_create("fd_conservation_posix_test");
+
+    for (i = 0; i < 100; i++) {
+      p = grpc_iomgr_create_endpoint_pair("test", NULL);
+      grpc_endpoint_destroy(p.client);
+      grpc_endpoint_destroy(p.server);
+      grpc_core::ExecCtx::Get()->Flush();
+    }
+
+    grpc_resource_quota_unref(resource_quota);
   }
 
-  grpc_resource_quota_unref(resource_quota);
-
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/fd_posix_test.cc b/test/core/iomgr/fd_posix_test.cc
index a03d841ecd..cf75517538 100644
--- a/test/core/iomgr/fd_posix_test.cc
+++ b/test/core/iomgr/fd_posix_test.cc
@@ -111,20 +111,19 @@ typedef struct {
 
 /* Called when an upload session can be safely shutdown.
    Close session FD and start to shutdown listen FD. */
-static void session_shutdown_cb(grpc_exec_ctx* exec_ctx, void* arg, /*session */
+static void session_shutdown_cb(void* arg, /*session */
                                 bool success) {
   session* se = static_cast<session*>(arg);
   server* sv = se->sv;
-  grpc_fd_orphan(exec_ctx, se->em_fd, nullptr, nullptr,
-                 false /* already_closed */, "a");
+  grpc_fd_orphan(se->em_fd, nullptr, nullptr, false /* already_closed */, "a");
   gpr_free(se);
   /* Start to shutdown listen fd. */
-  grpc_fd_shutdown(exec_ctx, sv->em_fd,
+  grpc_fd_shutdown(sv->em_fd,
                    GRPC_ERROR_CREATE_FROM_STATIC_STRING("session_shutdown_cb"));
 }
 
 /* Called when data become readable in a session. */
-static void session_read_cb(grpc_exec_ctx* exec_ctx, void* arg, /*session */
+static void session_read_cb(void* arg, /*session */
                             grpc_error* error) {
   session* se = static_cast<session*>(arg);
   int fd = grpc_fd_wrapped_fd(se->em_fd);
@@ -133,7 +132,7 @@ static void session_read_cb(grpc_exec_ctx* exec_ctx, void* arg, /*session */
   ssize_t read_total = 0;
 
   if (error != GRPC_ERROR_NONE) {
-    session_shutdown_cb(exec_ctx, arg, 1);
+    session_shutdown_cb(arg, 1);
     return;
   }
 
@@ -148,7 +147,7 @@ static void session_read_cb(grpc_exec_ctx* exec_ctx, void* arg, /*session */
      It is possible to read nothing due to spurious edge event or data has
      been drained, In such a case, read() returns -1 and set errno to EAGAIN. */
   if (read_once == 0) {
-    session_shutdown_cb(exec_ctx, arg, 1);
+    session_shutdown_cb(arg, 1);
   } else if (read_once == -1) {
     if (errno == EAGAIN) {
       /* An edge triggered event is cached in the kernel until next poll.
@@ -159,7 +158,7 @@ static void session_read_cb(grpc_exec_ctx* exec_ctx, void* arg, /*session */
          TODO(chenw): in multi-threaded version, callback and polling can be
          run in different threads. polling may catch a persist read edge event
          before notify_on_read is called.  */
-      grpc_fd_notify_on_read(exec_ctx, se->em_fd, &se->session_read_closure);
+      grpc_fd_notify_on_read(se->em_fd, &se->session_read_closure);
     } else {
       gpr_log(GPR_ERROR, "Unhandled read error %s", strerror(errno));
       abort();
@@ -169,22 +168,20 @@ static void session_read_cb(grpc_exec_ctx* exec_ctx, void* arg, /*session */
 
 /* Called when the listen FD can be safely shutdown.
    Close listen FD and signal that server can be shutdown. */
-static void listen_shutdown_cb(grpc_exec_ctx* exec_ctx, void* arg /*server */,
-                               int success) {
+static void listen_shutdown_cb(void* arg /*server */, int success) {
   server* sv = static_cast<server*>(arg);
 
-  grpc_fd_orphan(exec_ctx, sv->em_fd, nullptr, nullptr,
-                 false /* already_closed */, "b");
+  grpc_fd_orphan(sv->em_fd, nullptr, nullptr, false /* already_closed */, "b");
 
   gpr_mu_lock(g_mu);
   sv->done = 1;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
 /* Called when a new TCP connection request arrives in the listening port. */
-static void listen_cb(grpc_exec_ctx* exec_ctx, void* arg, /*=sv_arg*/
+static void listen_cb(void* arg, /*=sv_arg*/
                       grpc_error* error) {
   server* sv = static_cast<server*>(arg);
   int fd;
@@ -195,7 +192,7 @@ static void listen_cb(grpc_exec_ctx* exec_ctx, void* arg, /*=sv_arg*/
   grpc_fd* listen_em_fd = sv->em_fd;
 
   if (error != GRPC_ERROR_NONE) {
-    listen_shutdown_cb(exec_ctx, arg, 1);
+    listen_shutdown_cb(arg, 1);
     return;
   }
 
@@ -207,12 +204,12 @@ static void listen_cb(grpc_exec_ctx* exec_ctx, void* arg, /*=sv_arg*/
   se = static_cast<session*>(gpr_malloc(sizeof(*se)));
   se->sv = sv;
   se->em_fd = grpc_fd_create(fd, "listener");
-  grpc_pollset_add_fd(exec_ctx, g_pollset, se->em_fd);
+  grpc_pollset_add_fd(g_pollset, se->em_fd);
   GRPC_CLOSURE_INIT(&se->session_read_closure, session_read_cb, se,
                     grpc_schedule_on_exec_ctx);
-  grpc_fd_notify_on_read(exec_ctx, se->em_fd, &se->session_read_closure);
+  grpc_fd_notify_on_read(se->em_fd, &se->session_read_closure);
 
-  grpc_fd_notify_on_read(exec_ctx, listen_em_fd, &sv->listen_closure);
+  grpc_fd_notify_on_read(listen_em_fd, &sv->listen_closure);
 }
 
 /* Max number of connections pending to be accepted by listen(). */
@@ -222,7 +219,7 @@ static void listen_cb(grpc_exec_ctx* exec_ctx, void* arg, /*=sv_arg*/
    listen_cb() is registered to be interested in reading from listen_fd.
    When connection request arrives, listen_cb() is called to accept the
    connection request. */
-static int server_start(grpc_exec_ctx* exec_ctx, server* sv) {
+static int server_start(server* sv) {
   int port = 0;
   int fd;
   struct sockaddr_in sin;
@@ -236,11 +233,11 @@ static int server_start(grpc_exec_ctx* exec_ctx, server* sv) {
   GPR_ASSERT(listen(fd, MAX_NUM_FD) == 0);
 
   sv->em_fd = grpc_fd_create(fd, "server");
-  grpc_pollset_add_fd(exec_ctx, g_pollset, sv->em_fd);
+  grpc_pollset_add_fd(g_pollset, sv->em_fd);
   /* Register to be interested in reading from listen_fd. */
   GRPC_CLOSURE_INIT(&sv->listen_closure, listen_cb, sv,
                     grpc_schedule_on_exec_ctx);
-  grpc_fd_notify_on_read(exec_ctx, sv->em_fd, &sv->listen_closure);
+  grpc_fd_notify_on_read(sv->em_fd, &sv->listen_closure);
 
   return port;
 }
@@ -249,13 +246,13 @@ static int server_start(grpc_exec_ctx* exec_ctx, server* sv) {
 static void server_wait_and_shutdown(server* sv) {
   gpr_mu_lock(g_mu);
   while (!sv->done) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work", grpc_pollset_work(&exec_ctx, g_pollset, &worker,
-                                          GRPC_MILLIS_INF_FUTURE)));
+        "pollset_work",
+        grpc_pollset_work(g_pollset, &worker, GRPC_MILLIS_INF_FUTURE)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
@@ -289,18 +286,16 @@ static void client_init(client* cl) {
 }
 
 /* Called when a client upload session is ready to shutdown. */
-static void client_session_shutdown_cb(grpc_exec_ctx* exec_ctx,
-                                       void* arg /*client */, int success) {
+static void client_session_shutdown_cb(void* arg /*client */, int success) {
   client* cl = static_cast<client*>(arg);
-  grpc_fd_orphan(exec_ctx, cl->em_fd, nullptr, nullptr,
-                 false /* already_closed */, "c");
+  grpc_fd_orphan(cl->em_fd, nullptr, nullptr, false /* already_closed */, "c");
   cl->done = 1;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
 }
 
 /* Write as much as possible, then register notify_on_write. */
-static void client_session_write(grpc_exec_ctx* exec_ctx, void* arg, /*client */
+static void client_session_write(void* arg, /*client */
                                  grpc_error* error) {
   client* cl = static_cast<client*>(arg);
   int fd = grpc_fd_wrapped_fd(cl->em_fd);
@@ -308,7 +303,7 @@ static void client_session_write(grpc_exec_ctx* exec_ctx, void* arg, /*client */
 
   if (error != GRPC_ERROR_NONE) {
     gpr_mu_lock(g_mu);
-    client_session_shutdown_cb(exec_ctx, arg, 1);
+    client_session_shutdown_cb(arg, 1);
     gpr_mu_unlock(g_mu);
     return;
   }
@@ -323,10 +318,10 @@ static void client_session_write(grpc_exec_ctx* exec_ctx, void* arg, /*client */
     if (cl->client_write_cnt < CLIENT_TOTAL_WRITE_CNT) {
       GRPC_CLOSURE_INIT(&cl->write_closure, client_session_write, cl,
                         grpc_schedule_on_exec_ctx);
-      grpc_fd_notify_on_write(exec_ctx, cl->em_fd, &cl->write_closure);
+      grpc_fd_notify_on_write(cl->em_fd, &cl->write_closure);
       cl->client_write_cnt++;
     } else {
-      client_session_shutdown_cb(exec_ctx, arg, 1);
+      client_session_shutdown_cb(arg, 1);
     }
     gpr_mu_unlock(g_mu);
   } else {
@@ -336,7 +331,7 @@ static void client_session_write(grpc_exec_ctx* exec_ctx, void* arg, /*client */
 }
 
 /* Start a client to send a stream of bytes. */
-static void client_start(grpc_exec_ctx* exec_ctx, client* cl, int port) {
+static void client_start(client* cl, int port) {
   int fd;
   struct sockaddr_in sin;
   create_test_socket(port, &fd, &sin);
@@ -357,9 +352,9 @@ static void client_start(grpc_exec_ctx* exec_ctx, client* cl, int port) {
   }
 
   cl->em_fd = grpc_fd_create(fd, "client");
-  grpc_pollset_add_fd(exec_ctx, g_pollset, cl->em_fd);
+  grpc_pollset_add_fd(g_pollset, cl->em_fd);
 
-  client_session_write(exec_ctx, cl, GRPC_ERROR_NONE);
+  client_session_write(cl, GRPC_ERROR_NONE);
 }
 
 /* Wait for the signal to shutdown a client. */
@@ -367,12 +362,12 @@ static void client_wait_and_shutdown(client* cl) {
   gpr_mu_lock(g_mu);
   while (!cl->done) {
     grpc_pollset_worker* worker = nullptr;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work", grpc_pollset_work(&exec_ctx, g_pollset, &worker,
-                                          GRPC_MILLIS_INF_FUTURE)));
+        "pollset_work",
+        grpc_pollset_work(g_pollset, &worker, GRPC_MILLIS_INF_FUTURE)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
@@ -385,13 +380,13 @@ static void test_grpc_fd(void) {
   server sv;
   client cl;
   int port;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   server_init(&sv);
-  port = server_start(&exec_ctx, &sv);
+  port = server_start(&sv);
   client_init(&cl);
-  client_start(&exec_ctx, &cl, port);
-  grpc_exec_ctx_finish(&exec_ctx);
+  client_start(&cl, port);
+
   client_wait_and_shutdown(&cl);
   server_wait_and_shutdown(&sv);
   GPR_ASSERT(sv.read_bytes_total == cl.write_bytes_total);
@@ -406,27 +401,25 @@ void init_change_data(fd_change_data* fdc) { fdc->cb_that_ran = nullptr; }
 
 void destroy_change_data(fd_change_data* fdc) {}
 
-static void first_read_callback(grpc_exec_ctx* exec_ctx,
-                                void* arg /* fd_change_data */,
+static void first_read_callback(void* arg /* fd_change_data */,
                                 grpc_error* error) {
   fd_change_data* fdc = static_cast<fd_change_data*>(arg);
 
   gpr_mu_lock(g_mu);
   fdc->cb_that_ran = first_read_callback;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
-static void second_read_callback(grpc_exec_ctx* exec_ctx,
-                                 void* arg /* fd_change_data */,
+static void second_read_callback(void* arg /* fd_change_data */,
                                  grpc_error* error) {
   fd_change_data* fdc = static_cast<fd_change_data*>(arg);
 
   gpr_mu_lock(g_mu);
   fdc->cb_that_ran = second_read_callback;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
@@ -443,7 +436,7 @@ static void test_grpc_fd_change(void) {
   ssize_t result;
   grpc_closure first_closure;
   grpc_closure second_closure;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_CLOSURE_INIT(&first_closure, first_read_callback, &a,
                     grpc_schedule_on_exec_ctx);
@@ -460,10 +453,10 @@ static void test_grpc_fd_change(void) {
   GPR_ASSERT(fcntl(sv[1], F_SETFL, flags | O_NONBLOCK) == 0);
 
   em_fd = grpc_fd_create(sv[0], "test_grpc_fd_change");
-  grpc_pollset_add_fd(&exec_ctx, g_pollset, em_fd);
+  grpc_pollset_add_fd(g_pollset, em_fd);
 
   /* Register the first callback, then make its FD readable */
-  grpc_fd_notify_on_read(&exec_ctx, em_fd, &first_closure);
+  grpc_fd_notify_on_read(em_fd, &first_closure);
   data = 0;
   result = write(sv[1], &data, 1);
   GPR_ASSERT(result == 1);
@@ -473,10 +466,10 @@ static void test_grpc_fd_change(void) {
   while (a.cb_that_ran == nullptr) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work", grpc_pollset_work(&exec_ctx, g_pollset, &worker,
-                                          GRPC_MILLIS_INF_FUTURE)));
+        "pollset_work",
+        grpc_pollset_work(g_pollset, &worker, GRPC_MILLIS_INF_FUTURE)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   GPR_ASSERT(a.cb_that_ran == first_read_callback);
@@ -488,7 +481,7 @@ static void test_grpc_fd_change(void) {
 
   /* Now register a second callback with distinct change data, and do the same
      thing again. */
-  grpc_fd_notify_on_read(&exec_ctx, em_fd, &second_closure);
+  grpc_fd_notify_on_read(em_fd, &second_closure);
   data = 0;
   result = write(sv[1], &data, 1);
   GPR_ASSERT(result == 1);
@@ -497,44 +490,43 @@ static void test_grpc_fd_change(void) {
   while (b.cb_that_ran == nullptr) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work", grpc_pollset_work(&exec_ctx, g_pollset, &worker,
-                                          GRPC_MILLIS_INF_FUTURE)));
+        "pollset_work",
+        grpc_pollset_work(g_pollset, &worker, GRPC_MILLIS_INF_FUTURE)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   /* Except now we verify that second_read_callback ran instead */
   GPR_ASSERT(b.cb_that_ran == second_read_callback);
   gpr_mu_unlock(g_mu);
 
-  grpc_fd_orphan(&exec_ctx, em_fd, nullptr, nullptr, false /* already_closed */,
-                 "d");
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_fd_orphan(em_fd, nullptr, nullptr, false /* already_closed */, "d");
+
   destroy_change_data(&a);
   destroy_change_data(&b);
   close(sv[1]);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
-  grpc_pollset_init(g_pollset, &g_mu);
-  test_grpc_fd();
-  test_grpc_fd_change();
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_flush(&exec_ctx);
-  gpr_free(g_pollset);
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
+    grpc_pollset_init(g_pollset, &g_mu);
+    test_grpc_fd();
+    test_grpc_fd_change();
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
+    grpc_core::ExecCtx::Get()->Flush();
+    gpr_free(g_pollset);
+  }
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/load_file_test.cc b/test/core/iomgr/load_file_test.cc
index 9f360badcc..797d0ef1a4 100644
--- a/test/core/iomgr/load_file_test.cc
+++ b/test/core/iomgr/load_file_test.cc
@@ -19,6 +19,7 @@
 #include <stdio.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/slice.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
@@ -152,9 +153,11 @@ static void test_load_big_file(void) {
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_load_empty_file();
   test_load_failure();
   test_load_small_file();
   test_load_big_file();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/pollset_set_test.cc b/test/core/iomgr/pollset_set_test.cc
index 719eab91fe..f27079134b 100644
--- a/test/core/iomgr/pollset_set_test.cc
+++ b/test/core/iomgr/pollset_set_test.cc
@@ -47,11 +47,10 @@ void init_test_pollset_sets(test_pollset_set* pollset_sets, const int num_pss) {
   }
 }
 
-void cleanup_test_pollset_sets(grpc_exec_ctx* exec_ctx,
-                               test_pollset_set* pollset_sets,
+void cleanup_test_pollset_sets(test_pollset_set* pollset_sets,
                                const int num_pss) {
   for (int i = 0; i < num_pss; i++) {
-    grpc_pollset_set_destroy(exec_ctx, pollset_sets[i].pss);
+    grpc_pollset_set_destroy(pollset_sets[i].pss);
     pollset_sets[i].pss = nullptr;
   }
 }
@@ -73,21 +72,19 @@ static void init_test_pollsets(test_pollset* pollsets, const int num_pollsets) {
   }
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
-static void cleanup_test_pollsets(grpc_exec_ctx* exec_ctx,
-                                  test_pollset* pollsets,
+static void cleanup_test_pollsets(test_pollset* pollsets,
                                   const int num_pollsets) {
   grpc_closure destroyed;
   for (int i = 0; i < num_pollsets; i++) {
     GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, pollsets[i].ps,
                       grpc_schedule_on_exec_ctx);
-    grpc_pollset_shutdown(exec_ctx, pollsets[i].ps, &destroyed);
+    grpc_pollset_shutdown(pollsets[i].ps, &destroyed);
 
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_free(pollsets[i].ps);
     pollsets[i].ps = nullptr;
   }
@@ -105,45 +102,43 @@ typedef struct test_fd {
   grpc_closure on_readable;   /* Closure to call when this fd is readable */
 } test_fd;
 
-void on_readable(grpc_exec_ctx* exec_ctx, void* tfd, grpc_error* error) {
+void on_readable(void* tfd, grpc_error* error) {
   ((test_fd*)tfd)->is_on_readable_called = true;
 }
 
-static void reset_test_fd(grpc_exec_ctx* exec_ctx, test_fd* tfd) {
+static void reset_test_fd(test_fd* tfd) {
   tfd->is_on_readable_called = false;
 
   GRPC_CLOSURE_INIT(&tfd->on_readable, on_readable, tfd,
                     grpc_schedule_on_exec_ctx);
-  grpc_fd_notify_on_read(exec_ctx, tfd->fd, &tfd->on_readable);
+  grpc_fd_notify_on_read(tfd->fd, &tfd->on_readable);
 }
 
-static void init_test_fds(grpc_exec_ctx* exec_ctx, test_fd* tfds,
-                          const int num_fds) {
+static void init_test_fds(test_fd* tfds, const int num_fds) {
   for (int i = 0; i < num_fds; i++) {
     GPR_ASSERT(GRPC_ERROR_NONE == grpc_wakeup_fd_init(&tfds[i].wakeup_fd));
     tfds[i].fd = grpc_fd_create(GRPC_WAKEUP_FD_GET_READ_FD(&tfds[i].wakeup_fd),
                                 "test_fd");
-    reset_test_fd(exec_ctx, &tfds[i]);
+    reset_test_fd(&tfds[i]);
   }
 }
 
-static void cleanup_test_fds(grpc_exec_ctx* exec_ctx, test_fd* tfds,
-                             const int num_fds) {
+static void cleanup_test_fds(test_fd* tfds, const int num_fds) {
   int release_fd;
 
   for (int i = 0; i < num_fds; i++) {
-    grpc_fd_shutdown(exec_ctx, tfds[i].fd,
+    grpc_fd_shutdown(tfds[i].fd,
                      GRPC_ERROR_CREATE_FROM_STATIC_STRING("fd cleanup"));
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
 
     /* grpc_fd_orphan frees the memory allocated for grpc_fd. Normally it also
      * calls close() on the underlying fd. In our case, we are using
      * grpc_wakeup_fd and we would like to destroy it ourselves (by calling
      * grpc_wakeup_fd_destroy). To prevent grpc_fd from calling close() on the
      * underlying fd, call it with a non-NULL 'release_fd' parameter */
-    grpc_fd_orphan(exec_ctx, tfds[i].fd, nullptr, &release_fd,
-                   false /* already_closed */, "test_fd_cleanup");
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_fd_orphan(tfds[i].fd, nullptr, &release_fd, false /* already_closed */,
+                   "test_fd_cleanup");
+    grpc_core::ExecCtx::Get()->Flush();
 
     grpc_wakeup_fd_destroy(&tfds[i].wakeup_fd);
   }
@@ -155,8 +150,7 @@ static void make_test_fds_readable(test_fd* tfds, const int num_fds) {
   }
 }
 
-static void verify_readable_and_reset(grpc_exec_ctx* exec_ctx, test_fd* tfds,
-                                      const int num_fds) {
+static void verify_readable_and_reset(test_fd* tfds, const int num_fds) {
   for (int i = 0; i < num_fds; i++) {
     /* Verify that the on_readable callback was called */
     GPR_ASSERT(tfds[i].is_on_readable_called);
@@ -164,7 +158,7 @@ static void verify_readable_and_reset(grpc_exec_ctx* exec_ctx, test_fd* tfds,
     /* Reset the tfd[i] structure */
     GPR_ASSERT(GRPC_ERROR_NONE ==
                grpc_wakeup_fd_consume_wakeup(&tfds[i].wakeup_fd));
-    reset_test_fd(exec_ctx, &tfds[i]);
+    reset_test_fd(&tfds[i]);
   }
 }
 
@@ -205,7 +199,7 @@ static void pollset_set_test_basic() {
    *                    |
    *                    +---> FD9 (Added after PS2 is added to PSS0)
    */
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_pollset_worker* worker;
   grpc_millis deadline;
 
@@ -216,34 +210,33 @@ static void pollset_set_test_basic() {
   const int num_ps = GPR_ARRAY_SIZE(pollsets);
   const int num_pss = GPR_ARRAY_SIZE(pollset_sets);
 
-  init_test_fds(&exec_ctx, tfds, num_fds);
+  init_test_fds(tfds, num_fds);
   init_test_pollsets(pollsets, num_ps);
   init_test_pollset_sets(pollset_sets, num_pss);
 
   /* Construct the pollset_set/pollset/fd tree (see diagram above) */
 
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
+  grpc_pollset_set_add_fd(pollset_sets[0].pss, tfds[0].fd);
+  grpc_pollset_set_add_fd(pollset_sets[1].pss, tfds[1].fd);
 
-  grpc_pollset_add_fd(&exec_ctx, pollsets[0].ps, tfds[2].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[3].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollsets[2].ps, tfds[4].fd);
+  grpc_pollset_add_fd(pollsets[0].ps, tfds[2].fd);
+  grpc_pollset_add_fd(pollsets[1].ps, tfds[3].fd);
+  grpc_pollset_add_fd(pollsets[2].ps, tfds[4].fd);
 
-  grpc_pollset_set_add_pollset_set(&exec_ctx, pollset_sets[0].pss,
-                                   pollset_sets[1].pss);
+  grpc_pollset_set_add_pollset_set(pollset_sets[0].pss, pollset_sets[1].pss);
 
-  grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[1].pss, pollsets[0].ps);
-  grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[1].ps);
-  grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[2].ps);
+  grpc_pollset_set_add_pollset(pollset_sets[1].pss, pollsets[0].ps);
+  grpc_pollset_set_add_pollset(pollset_sets[0].pss, pollsets[1].ps);
+  grpc_pollset_set_add_pollset(pollset_sets[0].pss, pollsets[2].ps);
 
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[0].pss, tfds[5].fd);
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[6].fd);
+  grpc_pollset_set_add_fd(pollset_sets[0].pss, tfds[5].fd);
+  grpc_pollset_set_add_fd(pollset_sets[1].pss, tfds[6].fd);
 
-  grpc_pollset_add_fd(&exec_ctx, pollsets[0].ps, tfds[7].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[8].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollsets[2].ps, tfds[9].fd);
+  grpc_pollset_add_fd(pollsets[0].ps, tfds[7].fd);
+  grpc_pollset_add_fd(pollsets[1].ps, tfds[8].fd);
+  grpc_pollset_add_fd(pollsets[2].ps, tfds[9].fd);
 
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Test that if any FD in the above structure is readable, it is observable by
    * doing grpc_pollset_work on any pollset
@@ -263,34 +256,32 @@ static void pollset_set_test_basic() {
     deadline = grpc_timespec_to_millis_round_up(
         grpc_timeout_milliseconds_to_deadline(2));
     GPR_ASSERT(GRPC_ERROR_NONE ==
-               grpc_pollset_work(&exec_ctx, pollsets[i].ps, &worker, deadline));
+               grpc_pollset_work(pollsets[i].ps, &worker, deadline));
     gpr_mu_unlock(pollsets[i].mu);
 
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
 
-    verify_readable_and_reset(&exec_ctx, tfds, num_fds);
-    grpc_exec_ctx_flush(&exec_ctx);
+    verify_readable_and_reset(tfds, num_fds);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   /* Test tear down */
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[0].pss, tfds[5].fd);
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[6].fd);
-  grpc_exec_ctx_flush(&exec_ctx);
-
-  grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[1].pss, pollsets[0].ps);
-  grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[1].ps);
-  grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[2].ps);
-
-  grpc_pollset_set_del_pollset_set(&exec_ctx, pollset_sets[0].pss,
-                                   pollset_sets[1].pss);
-  grpc_exec_ctx_flush(&exec_ctx);
-
-  cleanup_test_fds(&exec_ctx, tfds, num_fds);
-  cleanup_test_pollsets(&exec_ctx, pollsets, num_ps);
-  cleanup_test_pollset_sets(&exec_ctx, pollset_sets, num_pss);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_pollset_set_del_fd(pollset_sets[0].pss, tfds[0].fd);
+  grpc_pollset_set_del_fd(pollset_sets[0].pss, tfds[5].fd);
+  grpc_pollset_set_del_fd(pollset_sets[1].pss, tfds[1].fd);
+  grpc_pollset_set_del_fd(pollset_sets[1].pss, tfds[6].fd);
+  grpc_core::ExecCtx::Get()->Flush();
+
+  grpc_pollset_set_del_pollset(pollset_sets[1].pss, pollsets[0].ps);
+  grpc_pollset_set_del_pollset(pollset_sets[0].pss, pollsets[1].ps);
+  grpc_pollset_set_del_pollset(pollset_sets[0].pss, pollsets[2].ps);
+
+  grpc_pollset_set_del_pollset_set(pollset_sets[0].pss, pollset_sets[1].pss);
+  grpc_core::ExecCtx::Get()->Flush();
+
+  cleanup_test_fds(tfds, num_fds);
+  cleanup_test_pollsets(pollsets, num_ps);
+  cleanup_test_pollset_sets(pollset_sets, num_pss);
 }
 
 /* Same FD added multiple times to the pollset_set tree */
@@ -310,7 +301,7 @@ void pollset_set_test_dup_fds() {
    *                    |           +--> FD2
    *                    +---> FD1
    */
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_pollset_worker* worker;
   grpc_millis deadline;
 
@@ -321,21 +312,20 @@ void pollset_set_test_dup_fds() {
   const int num_ps = 1;
   const int num_pss = GPR_ARRAY_SIZE(pollset_sets);
 
-  init_test_fds(&exec_ctx, tfds, num_fds);
+  init_test_fds(tfds, num_fds);
   init_test_pollsets(&pollset, num_ps);
   init_test_pollset_sets(pollset_sets, num_pss);
 
   /* Construct the structure */
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[0].fd);
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
+  grpc_pollset_set_add_fd(pollset_sets[0].pss, tfds[0].fd);
+  grpc_pollset_set_add_fd(pollset_sets[1].pss, tfds[0].fd);
+  grpc_pollset_set_add_fd(pollset_sets[1].pss, tfds[1].fd);
 
-  grpc_pollset_add_fd(&exec_ctx, pollset.ps, tfds[1].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollset.ps, tfds[2].fd);
+  grpc_pollset_add_fd(pollset.ps, tfds[1].fd);
+  grpc_pollset_add_fd(pollset.ps, tfds[2].fd);
 
-  grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[1].pss, pollset.ps);
-  grpc_pollset_set_add_pollset_set(&exec_ctx, pollset_sets[0].pss,
-                                   pollset_sets[1].pss);
+  grpc_pollset_set_add_pollset(pollset_sets[1].pss, pollset.ps);
+  grpc_pollset_set_add_pollset_set(pollset_sets[0].pss, pollset_sets[1].pss);
 
   /* Test. Make all FDs readable and make sure that can be observed by doing a
    * grpc_pollset_work on the pollset 'PS' */
@@ -345,27 +335,25 @@ void pollset_set_test_dup_fds() {
   deadline = grpc_timespec_to_millis_round_up(
       grpc_timeout_milliseconds_to_deadline(2));
   GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_pollset_work(&exec_ctx, pollset.ps, &worker, deadline));
+             grpc_pollset_work(pollset.ps, &worker, deadline));
   gpr_mu_unlock(pollset.mu);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  verify_readable_and_reset(&exec_ctx, tfds, num_fds);
-  grpc_exec_ctx_flush(&exec_ctx);
+  verify_readable_and_reset(tfds, num_fds);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Tear down */
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[0].fd);
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
-
-  grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[1].pss, pollset.ps);
-  grpc_pollset_set_del_pollset_set(&exec_ctx, pollset_sets[0].pss,
-                                   pollset_sets[1].pss);
-  grpc_exec_ctx_flush(&exec_ctx);
-
-  cleanup_test_fds(&exec_ctx, tfds, num_fds);
-  cleanup_test_pollsets(&exec_ctx, &pollset, num_ps);
-  cleanup_test_pollset_sets(&exec_ctx, pollset_sets, num_pss);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_pollset_set_del_fd(pollset_sets[0].pss, tfds[0].fd);
+  grpc_pollset_set_del_fd(pollset_sets[1].pss, tfds[0].fd);
+  grpc_pollset_set_del_fd(pollset_sets[1].pss, tfds[1].fd);
+
+  grpc_pollset_set_del_pollset(pollset_sets[1].pss, pollset.ps);
+  grpc_pollset_set_del_pollset_set(pollset_sets[0].pss, pollset_sets[1].pss);
+  grpc_core::ExecCtx::Get()->Flush();
+
+  cleanup_test_fds(tfds, num_fds);
+  cleanup_test_pollsets(&pollset, num_ps);
+  cleanup_test_pollset_sets(pollset_sets, num_pss);
 }
 
 /* Pollset_set with an empty pollset */
@@ -383,7 +371,7 @@ void pollset_set_test_empty_pollset() {
    *                   |
    *                   +---> FD2
    */
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_pollset_worker* worker;
   grpc_millis deadline;
 
@@ -394,17 +382,17 @@ void pollset_set_test_empty_pollset() {
   const int num_ps = GPR_ARRAY_SIZE(pollsets);
   const int num_pss = 1;
 
-  init_test_fds(&exec_ctx, tfds, num_fds);
+  init_test_fds(tfds, num_fds);
   init_test_pollsets(pollsets, num_ps);
   init_test_pollset_sets(&pollset_set, num_pss);
 
   /* Construct the structure */
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_set.pss, tfds[0].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[1].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[2].fd);
+  grpc_pollset_set_add_fd(pollset_set.pss, tfds[0].fd);
+  grpc_pollset_add_fd(pollsets[1].ps, tfds[1].fd);
+  grpc_pollset_add_fd(pollsets[1].ps, tfds[2].fd);
 
-  grpc_pollset_set_add_pollset(&exec_ctx, pollset_set.pss, pollsets[0].ps);
-  grpc_pollset_set_add_pollset(&exec_ctx, pollset_set.pss, pollsets[1].ps);
+  grpc_pollset_set_add_pollset(pollset_set.pss, pollsets[0].ps);
+  grpc_pollset_set_add_pollset(pollset_set.pss, pollsets[1].ps);
 
   /* Test. Make all FDs readable and make sure that can be observed by doing
    * grpc_pollset_work on the empty pollset 'PS0' */
@@ -414,45 +402,44 @@ void pollset_set_test_empty_pollset() {
   deadline = grpc_timespec_to_millis_round_up(
       grpc_timeout_milliseconds_to_deadline(2));
   GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_pollset_work(&exec_ctx, pollsets[0].ps, &worker, deadline));
+             grpc_pollset_work(pollsets[0].ps, &worker, deadline));
   gpr_mu_unlock(pollsets[0].mu);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  verify_readable_and_reset(&exec_ctx, tfds, num_fds);
-  grpc_exec_ctx_flush(&exec_ctx);
+  verify_readable_and_reset(tfds, num_fds);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Tear down */
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_set.pss, tfds[0].fd);
-  grpc_pollset_set_del_pollset(&exec_ctx, pollset_set.pss, pollsets[0].ps);
-  grpc_pollset_set_del_pollset(&exec_ctx, pollset_set.pss, pollsets[1].ps);
-  grpc_exec_ctx_flush(&exec_ctx);
-
-  cleanup_test_fds(&exec_ctx, tfds, num_fds);
-  cleanup_test_pollsets(&exec_ctx, pollsets, num_ps);
-  cleanup_test_pollset_sets(&exec_ctx, &pollset_set, num_pss);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_pollset_set_del_fd(pollset_set.pss, tfds[0].fd);
+  grpc_pollset_set_del_pollset(pollset_set.pss, pollsets[0].ps);
+  grpc_pollset_set_del_pollset(pollset_set.pss, pollsets[1].ps);
+  grpc_core::ExecCtx::Get()->Flush();
+
+  cleanup_test_fds(tfds, num_fds);
+  cleanup_test_pollsets(pollsets, num_ps);
+  cleanup_test_pollset_sets(&pollset_set, num_pss);
 }
 
 int main(int argc, char** argv) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  const char* poll_strategy = grpc_get_poll_strategy_name();
-
-  if (poll_strategy != nullptr &&
-      (strcmp(poll_strategy, "epollsig") == 0 ||
-       strcmp(poll_strategy, "epoll-threadpool") == 0)) {
-    pollset_set_test_basic();
-    pollset_set_test_dup_fds();
-    pollset_set_test_empty_pollset();
-  } else {
-    gpr_log(GPR_INFO,
-            "Skipping the test. The test is only relevant for 'epoll' "
-            "strategy. and the current strategy is: '%s'",
-            poll_strategy);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    const char* poll_strategy = grpc_get_poll_strategy_name();
+
+    if (poll_strategy != nullptr &&
+        (strcmp(poll_strategy, "epollsig") == 0 ||
+         strcmp(poll_strategy, "epoll-threadpool") == 0)) {
+      pollset_set_test_basic();
+      pollset_set_test_dup_fds();
+      pollset_set_test_empty_pollset();
+    } else {
+      gpr_log(GPR_INFO,
+              "Skipping the test. The test is only relevant for 'epoll' "
+              "strategy. and the current strategy is: '%s'",
+              poll_strategy);
+    }
   }
-
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/resolve_address_posix_test.cc b/test/core/iomgr/resolve_address_posix_test.cc
index 1a5eb9ace1..e36315333c 100644
--- a/test/core/iomgr/resolve_address_posix_test.cc
+++ b/test/core/iomgr/resolve_address_posix_test.cc
@@ -46,29 +46,29 @@ typedef struct args_struct {
   grpc_pollset_set* pollset_set;
 } args_struct;
 
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void do_nothing(void* arg, grpc_error* error) {}
 
-void args_init(grpc_exec_ctx* exec_ctx, args_struct* args) {
+void args_init(args_struct* args) {
   gpr_event_init(&args->ev);
   args->pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(args->pollset, &args->mu);
   args->pollset_set = grpc_pollset_set_create();
-  grpc_pollset_set_add_pollset(exec_ctx, args->pollset_set, args->pollset);
+  grpc_pollset_set_add_pollset(args->pollset_set, args->pollset);
   args->addrs = nullptr;
 }
 
-void args_finish(grpc_exec_ctx* exec_ctx, args_struct* args) {
+void args_finish(args_struct* args) {
   GPR_ASSERT(gpr_event_wait(&args->ev, test_deadline()));
   grpc_resolved_addresses_destroy(args->addrs);
-  grpc_pollset_set_del_pollset(exec_ctx, args->pollset_set, args->pollset);
-  grpc_pollset_set_destroy(exec_ctx, args->pollset_set);
+  grpc_pollset_set_del_pollset(args->pollset_set, args->pollset);
+  grpc_pollset_set_destroy(args->pollset_set);
   grpc_closure do_nothing_cb;
   GRPC_CLOSURE_INIT(&do_nothing_cb, do_nothing, nullptr,
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(exec_ctx, args->pollset, &do_nothing_cb);
+  grpc_pollset_shutdown(args->pollset, &do_nothing_cb);
   // exec_ctx needs to be flushed before calling grpc_pollset_destroy()
-  grpc_exec_ctx_flush(exec_ctx);
-  grpc_pollset_destroy(exec_ctx, args->pollset);
+  grpc_core::ExecCtx::Get()->Flush();
+  grpc_pollset_destroy(args->pollset);
   gpr_free(args->pollset);
 }
 
@@ -79,36 +79,33 @@ static grpc_millis n_sec_deadline(int seconds) {
 
 static void actually_poll(void* argsp) {
   args_struct* args = static_cast<args_struct*>(argsp);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_millis deadline = n_sec_deadline(10);
   while (true) {
+    grpc_core::ExecCtx exec_ctx;
     bool done = gpr_atm_acq_load(&args->done_atm) != 0;
     if (done) {
       break;
     }
-    grpc_millis time_left = deadline - grpc_exec_ctx_now(&exec_ctx);
+    grpc_millis time_left = deadline - grpc_core::ExecCtx::Get()->Now();
     gpr_log(GPR_DEBUG, "done=%d, time_left=%" PRIdPTR, done, time_left);
     GPR_ASSERT(time_left >= 0);
     grpc_pollset_worker* worker = nullptr;
     gpr_mu_lock(args->mu);
-    GRPC_LOG_IF_ERROR("pollset_work",
-                      grpc_pollset_work(&exec_ctx, args->pollset, &worker,
-                                        n_sec_deadline(1)));
+    GRPC_LOG_IF_ERROR("pollset_work", grpc_pollset_work(args->pollset, &worker,
+                                                        n_sec_deadline(1)));
     gpr_mu_unlock(args->mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   }
   gpr_event_set(&args->ev, (void*)1);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void poll_pollset_until_request_done(args_struct* args) {
   gpr_atm_rel_store(&args->done_atm, 0);
   gpr_thd_id id;
-  gpr_thd_new(&id, actually_poll, args, nullptr);
+  gpr_thd_new(&id, "grpc_poll_pollset", actually_poll, args, nullptr);
 }
 
-static void must_succeed(grpc_exec_ctx* exec_ctx, void* argsp,
-                         grpc_error* err) {
+static void must_succeed(void* argsp, grpc_error* err) {
   args_struct* args = static_cast<args_struct*>(argsp);
   GPR_ASSERT(err == GRPC_ERROR_NONE);
   GPR_ASSERT(args->addrs != nullptr);
@@ -116,29 +113,28 @@ static void must_succeed(grpc_exec_ctx* exec_ctx, void* argsp,
   gpr_atm_rel_store(&args->done_atm, 1);
 }
 
-static void must_fail(grpc_exec_ctx* exec_ctx, void* argsp, grpc_error* err) {
+static void must_fail(void* argsp, grpc_error* err) {
   args_struct* args = static_cast<args_struct*>(argsp);
   GPR_ASSERT(err != GRPC_ERROR_NONE);
   gpr_atm_rel_store(&args->done_atm, 1);
 }
 
 static void test_unix_socket(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   poll_pollset_until_request_done(&args);
   grpc_resolve_address(
-      &exec_ctx, "unix:/path/name", nullptr, args.pollset_set,
+      "unix:/path/name", nullptr, args.pollset_set,
       GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 static void test_unix_socket_path_name_too_long(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   const char prefix[] = "unix:/path/name";
   size_t path_name_length =
       GPR_ARRAY_SIZE(((struct sockaddr_un*)nullptr)->sun_path) + 6;
@@ -150,22 +146,23 @@ static void test_unix_socket_path_name_too_long(void) {
 
   poll_pollset_until_request_done(&args);
   grpc_resolve_address(
-      &exec_ctx, path_name, nullptr, args.pollset_set,
+      path_name, nullptr, args.pollset_set,
       GRPC_CLOSURE_CREATE(must_fail, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
   gpr_free(path_name);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  test_unix_socket();
-  test_unix_socket_path_name_too_long();
-  grpc_executor_shutdown(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+
+  {
+    grpc_core::ExecCtx exec_ctx;
+    test_unix_socket();
+    test_unix_socket_path_name_too_long();
+  }
+
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/resolve_address_test.cc b/test/core/iomgr/resolve_address_test.cc
index 1c5aa38a95..a0dc484f3e 100644
--- a/test/core/iomgr/resolve_address_test.cc
+++ b/test/core/iomgr/resolve_address_test.cc
@@ -39,32 +39,32 @@ typedef struct args_struct {
   grpc_pollset_set* pollset_set;
 } args_struct;
 
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void do_nothing(void* arg, grpc_error* error) {}
 
-void args_init(grpc_exec_ctx* exec_ctx, args_struct* args) {
+void args_init(args_struct* args) {
   gpr_event_init(&args->ev);
   args->pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(args->pollset, &args->mu);
   args->pollset_set = grpc_pollset_set_create();
-  grpc_pollset_set_add_pollset(exec_ctx, args->pollset_set, args->pollset);
+  grpc_pollset_set_add_pollset(args->pollset_set, args->pollset);
   args->addrs = nullptr;
   gpr_atm_rel_store(&args->done_atm, 0);
 }
 
-void args_finish(grpc_exec_ctx* exec_ctx, args_struct* args) {
+void args_finish(args_struct* args) {
   GPR_ASSERT(gpr_event_wait(&args->ev, test_deadline()));
   grpc_resolved_addresses_destroy(args->addrs);
-  grpc_pollset_set_del_pollset(exec_ctx, args->pollset_set, args->pollset);
-  grpc_pollset_set_destroy(exec_ctx, args->pollset_set);
+  grpc_pollset_set_del_pollset(args->pollset_set, args->pollset);
+  grpc_pollset_set_destroy(args->pollset_set);
   grpc_closure do_nothing_cb;
   GRPC_CLOSURE_INIT(&do_nothing_cb, do_nothing, nullptr,
                     grpc_schedule_on_exec_ctx);
   gpr_mu_lock(args->mu);
-  grpc_pollset_shutdown(exec_ctx, args->pollset, &do_nothing_cb);
+  grpc_pollset_shutdown(args->pollset, &do_nothing_cb);
   gpr_mu_unlock(args->mu);
   // exec_ctx needs to be flushed before calling grpc_pollset_destroy()
-  grpc_exec_ctx_flush(exec_ctx);
-  grpc_pollset_destroy(exec_ctx, args->pollset);
+  grpc_core::ExecCtx::Get()->Flush();
+  grpc_pollset_destroy(args->pollset);
   gpr_free(args->pollset);
 }
 
@@ -74,119 +74,109 @@ static grpc_millis n_sec_deadline(int seconds) {
 }
 
 static void poll_pollset_until_request_done(args_struct* args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_millis deadline = n_sec_deadline(10);
   while (true) {
     bool done = gpr_atm_acq_load(&args->done_atm) != 0;
     if (done) {
       break;
     }
-    grpc_millis time_left = deadline - grpc_exec_ctx_now(&exec_ctx);
+    grpc_millis time_left = deadline - grpc_core::ExecCtx::Get()->Now();
     gpr_log(GPR_DEBUG, "done=%d, time_left=%" PRIdPTR, done, time_left);
     GPR_ASSERT(time_left >= 0);
     grpc_pollset_worker* worker = nullptr;
     gpr_mu_lock(args->mu);
-    GRPC_LOG_IF_ERROR("pollset_work",
-                      grpc_pollset_work(&exec_ctx, args->pollset, &worker,
-                                        n_sec_deadline(1)));
+    GRPC_LOG_IF_ERROR("pollset_work", grpc_pollset_work(args->pollset, &worker,
+                                                        n_sec_deadline(1)));
     gpr_mu_unlock(args->mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   }
   gpr_event_set(&args->ev, (void*)1);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void must_succeed(grpc_exec_ctx* exec_ctx, void* argsp,
-                         grpc_error* err) {
+static void must_succeed(void* argsp, grpc_error* err) {
   args_struct* args = static_cast<args_struct*>(argsp);
   GPR_ASSERT(err == GRPC_ERROR_NONE);
   GPR_ASSERT(args->addrs != nullptr);
   GPR_ASSERT(args->addrs->naddrs > 0);
   gpr_atm_rel_store(&args->done_atm, 1);
   gpr_mu_lock(args->mu);
-  GRPC_LOG_IF_ERROR("pollset_kick",
-                    grpc_pollset_kick(exec_ctx, args->pollset, nullptr));
+  GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(args->pollset, nullptr));
   gpr_mu_unlock(args->mu);
 }
 
-static void must_fail(grpc_exec_ctx* exec_ctx, void* argsp, grpc_error* err) {
+static void must_fail(void* argsp, grpc_error* err) {
   args_struct* args = static_cast<args_struct*>(argsp);
   GPR_ASSERT(err != GRPC_ERROR_NONE);
   gpr_atm_rel_store(&args->done_atm, 1);
   gpr_mu_lock(args->mu);
-  GRPC_LOG_IF_ERROR("pollset_kick",
-                    grpc_pollset_kick(exec_ctx, args->pollset, nullptr));
+  GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(args->pollset, nullptr));
   gpr_mu_unlock(args->mu);
 }
 
 static void test_localhost(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   grpc_resolve_address(
-      &exec_ctx, "localhost:1", nullptr, args.pollset_set,
+      "localhost:1", nullptr, args.pollset_set,
       GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   poll_pollset_until_request_done(&args);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 static void test_default_port(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   grpc_resolve_address(
-      &exec_ctx, "localhost", "1", args.pollset_set,
+      "localhost", "1", args.pollset_set,
       GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   poll_pollset_until_request_done(&args);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 static void test_non_numeric_default_port(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   grpc_resolve_address(
-      &exec_ctx, "localhost", "https", args.pollset_set,
+      "localhost", "https", args.pollset_set,
       GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   poll_pollset_until_request_done(&args);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 static void test_missing_default_port(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   grpc_resolve_address(
-      &exec_ctx, "localhost", nullptr, args.pollset_set,
+      "localhost", nullptr, args.pollset_set,
       GRPC_CLOSURE_CREATE(must_fail, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   poll_pollset_until_request_done(&args);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 static void test_ipv6_with_port(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   grpc_resolve_address(
-      &exec_ctx, "[2001:db8::1]:1", nullptr, args.pollset_set,
+      "[2001:db8::1]:1", nullptr, args.pollset_set,
       GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   poll_pollset_until_request_done(&args);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 static void test_ipv6_without_port(void) {
@@ -197,17 +187,16 @@ static void test_ipv6_without_port(void) {
   };
   unsigned i;
   for (i = 0; i < sizeof(kCases) / sizeof(*kCases); i++) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     args_struct args;
-    args_init(&exec_ctx, &args);
+    args_init(&args);
     grpc_resolve_address(
-        &exec_ctx, kCases[i], "80", args.pollset_set,
+        kCases[i], "80", args.pollset_set,
         GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
         &args.addrs);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     poll_pollset_until_request_done(&args);
-    args_finish(&exec_ctx, &args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    args_finish(&args);
   }
 }
 
@@ -218,17 +207,16 @@ static void test_invalid_ip_addresses(void) {
   };
   unsigned i;
   for (i = 0; i < sizeof(kCases) / sizeof(*kCases); i++) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     args_struct args;
-    args_init(&exec_ctx, &args);
+    args_init(&args);
     grpc_resolve_address(
-        &exec_ctx, kCases[i], nullptr, args.pollset_set,
+        kCases[i], nullptr, args.pollset_set,
         GRPC_CLOSURE_CREATE(must_fail, &args, grpc_schedule_on_exec_ctx),
         &args.addrs);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     poll_pollset_until_request_done(&args);
-    args_finish(&exec_ctx, &args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    args_finish(&args);
   }
 }
 
@@ -238,34 +226,35 @@ static void test_unparseable_hostports(void) {
   };
   unsigned i;
   for (i = 0; i < sizeof(kCases) / sizeof(*kCases); i++) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     args_struct args;
-    args_init(&exec_ctx, &args);
+    args_init(&args);
     grpc_resolve_address(
-        &exec_ctx, kCases[i], "1", args.pollset_set,
+        kCases[i], "1", args.pollset_set,
         GRPC_CLOSURE_CREATE(must_fail, &args, grpc_schedule_on_exec_ctx),
         &args.addrs);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     poll_pollset_until_request_done(&args);
-    args_finish(&exec_ctx, &args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    args_finish(&args);
   }
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  test_localhost();
-  test_default_port();
-  test_non_numeric_default_port();
-  test_missing_default_port();
-  test_ipv6_with_port();
-  test_ipv6_without_port();
-  test_invalid_ip_addresses();
-  test_unparseable_hostports();
-  grpc_executor_shutdown(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    test_localhost();
+    test_default_port();
+    test_non_numeric_default_port();
+    test_missing_default_port();
+    test_ipv6_with_port();
+    test_ipv6_without_port();
+    test_invalid_ip_addresses();
+    test_unparseable_hostports();
+    grpc_executor_shutdown();
+  }
+
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/resource_quota_test.cc b/test/core/iomgr/resource_quota_test.cc
index 6851702e67..ae26f72701 100644
--- a/test/core/iomgr/resource_quota_test.cc
+++ b/test/core/iomgr/resource_quota_test.cc
@@ -27,7 +27,7 @@
 gpr_mu g_mu;
 gpr_cv g_cv;
 
-static void inc_int_cb(grpc_exec_ctx* exec_ctx, void* a, grpc_error* error) {
+static void inc_int_cb(void* a, grpc_error* error) {
   gpr_mu_lock(&g_mu);
   ++*(int*)a;
   gpr_cv_signal(&g_cv);
@@ -43,7 +43,7 @@ static void assert_counter_becomes(int* ctr, int value) {
   gpr_mu_unlock(&g_mu);
 }
 
-static void set_event_cb(grpc_exec_ctx* exec_ctx, void* a, grpc_error* error) {
+static void set_event_cb(void* a, grpc_error* error) {
   gpr_event_set((gpr_event*)a, (void*)1);
 }
 grpc_closure* set_event(gpr_event* ev) {
@@ -56,13 +56,12 @@ typedef struct {
   grpc_closure* then;
 } reclaimer_args;
 
-static void reclaimer_cb(grpc_exec_ctx* exec_ctx, void* args,
-                         grpc_error* error) {
+static void reclaimer_cb(void* args, grpc_error* error) {
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   reclaimer_args* a = static_cast<reclaimer_args*>(args);
-  grpc_resource_user_free(exec_ctx, a->resource_user, a->size);
-  grpc_resource_user_finish_reclamation(exec_ctx, a->resource_user);
-  GRPC_CLOSURE_RUN(exec_ctx, a->then, GRPC_ERROR_NONE);
+  grpc_resource_user_free(a->resource_user, a->size);
+  grpc_resource_user_finish_reclamation(a->resource_user);
+  GRPC_CLOSURE_RUN(a->then, GRPC_ERROR_NONE);
   gpr_free(a);
 }
 
@@ -75,10 +74,9 @@ grpc_closure* make_reclaimer(grpc_resource_user* resource_user, size_t size,
   return GRPC_CLOSURE_CREATE(reclaimer_cb, a, grpc_schedule_on_exec_ctx);
 }
 
-static void unused_reclaimer_cb(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_error* error) {
+static void unused_reclaimer_cb(void* arg, grpc_error* error) {
   GPR_ASSERT(error == GRPC_ERROR_CANCELLED);
-  GRPC_CLOSURE_RUN(exec_ctx, static_cast<grpc_closure*>(arg), GRPC_ERROR_NONE);
+  GRPC_CLOSURE_RUN(static_cast<grpc_closure*>(arg), GRPC_ERROR_NONE);
 }
 grpc_closure* make_unused_reclaimer(grpc_closure* then) {
   return GRPC_CLOSURE_CREATE(unused_reclaimer_cb, then,
@@ -86,9 +84,8 @@ grpc_closure* make_unused_reclaimer(grpc_closure* then) {
 }
 
 static void destroy_user(grpc_resource_user* usr) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_resource_user_unref(&exec_ctx, usr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_resource_user_unref(usr);
 }
 
 static void test_no_op(void) {
@@ -120,14 +117,12 @@ static void test_instant_alloc_then_free(void) {
   grpc_resource_quota_resize(q, 1024 * 1024);
   grpc_resource_user* usr = grpc_resource_user_create(q, "usr");
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, nullptr);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, NULL);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -140,10 +135,9 @@ static void test_instant_alloc_free_pair(void) {
   grpc_resource_quota_resize(q, 1024 * 1024);
   grpc_resource_user* usr = grpc_resource_user_create(q, "usr");
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, nullptr);
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, NULL);
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -158,16 +152,15 @@ static void test_simple_async_alloc(void) {
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -182,9 +175,9 @@ static void test_async_alloc_blocked_by_size(void) {
   gpr_event ev;
   gpr_event_init(&ev);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(
                    &ev, grpc_timeout_milliseconds_to_deadline(100)) == nullptr);
   }
@@ -193,9 +186,8 @@ static void test_async_alloc_blocked_by_size(void) {
              nullptr);
   ;
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -210,32 +202,30 @@ static void test_scavenge(void) {
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr1, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr1, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr1, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr1, 1024);
   }
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr2, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr2, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr2, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr2, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr1);
@@ -251,33 +241,32 @@ static void test_scavenge_blocked(void) {
   gpr_event ev;
   {
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr1, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr1, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
   }
   {
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr2, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr2, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(
                    &ev, grpc_timeout_milliseconds_to_deadline(100)) == nullptr);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr1, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr1, 1024);
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr2, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr2, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr1);
@@ -293,9 +282,9 @@ static void test_blocked_until_scheduled_reclaim(void) {
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
@@ -303,18 +292,16 @@ static void test_blocked_until_scheduled_reclaim(void) {
   gpr_event reclaim_done;
   gpr_event_init(&reclaim_done);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, false,
-        make_reclaimer(usr, 1024, set_event(&reclaim_done)));
-    grpc_exec_ctx_finish(&exec_ctx);
+        usr, false, make_reclaimer(usr, 1024, set_event(&reclaim_done)));
   }
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&reclaim_done,
                               grpc_timeout_seconds_to_deadline(5)) != nullptr);
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
@@ -322,9 +309,8 @@ static void test_blocked_until_scheduled_reclaim(void) {
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -340,9 +326,9 @@ static void test_blocked_until_scheduled_reclaim_and_scavenge(void) {
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr1, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr1, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
@@ -350,18 +336,16 @@ static void test_blocked_until_scheduled_reclaim_and_scavenge(void) {
   gpr_event reclaim_done;
   gpr_event_init(&reclaim_done);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr1, false,
-        make_reclaimer(usr1, 1024, set_event(&reclaim_done)));
-    grpc_exec_ctx_finish(&exec_ctx);
+        usr1, false, make_reclaimer(usr1, 1024, set_event(&reclaim_done)));
   }
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr2, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr2, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&reclaim_done,
                               grpc_timeout_seconds_to_deadline(5)) != nullptr);
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
@@ -369,9 +353,8 @@ static void test_blocked_until_scheduled_reclaim_and_scavenge(void) {
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr2, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr2, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr1);
@@ -387,9 +370,9 @@ static void test_blocked_until_scheduled_destructive_reclaim(void) {
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
@@ -397,18 +380,16 @@ static void test_blocked_until_scheduled_destructive_reclaim(void) {
   gpr_event reclaim_done;
   gpr_event_init(&reclaim_done);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, true,
-        make_reclaimer(usr, 1024, set_event(&reclaim_done)));
-    grpc_exec_ctx_finish(&exec_ctx);
+        usr, true, make_reclaimer(usr, 1024, set_event(&reclaim_done)));
   }
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&reclaim_done,
                               grpc_timeout_seconds_to_deadline(5)) != nullptr);
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
@@ -416,9 +397,8 @@ static void test_blocked_until_scheduled_destructive_reclaim(void) {
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -435,13 +415,12 @@ static void test_unused_reclaim_is_cancelled(void) {
   gpr_event destructive_done;
   gpr_event_init(&destructive_done);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, false, make_unused_reclaimer(set_event(&benign_done)));
+        usr, false, make_unused_reclaimer(set_event(&benign_done)));
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, true,
-        make_unused_reclaimer(set_event(&destructive_done)));
-    grpc_exec_ctx_finish(&exec_ctx);
+        usr, true, make_unused_reclaimer(set_event(&destructive_done)));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&benign_done,
                               grpc_timeout_milliseconds_to_deadline(100)) ==
                nullptr);
@@ -470,22 +449,20 @@ static void test_benign_reclaim_is_preferred(void) {
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, false,
-        make_reclaimer(usr, 1024, set_event(&benign_done)));
+        usr, false, make_reclaimer(usr, 1024, set_event(&benign_done)));
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, true,
-        make_unused_reclaimer(set_event(&destructive_done)));
-    grpc_exec_ctx_finish(&exec_ctx);
+        usr, true, make_unused_reclaimer(set_event(&destructive_done)));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&benign_done,
                               grpc_timeout_milliseconds_to_deadline(100)) ==
                nullptr);
@@ -496,9 +473,9 @@ static void test_benign_reclaim_is_preferred(void) {
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&benign_done,
                               grpc_timeout_seconds_to_deadline(5)) != nullptr);
     GPR_ASSERT(gpr_event_wait(&destructive_done,
@@ -508,9 +485,8 @@ static void test_benign_reclaim_is_preferred(void) {
                nullptr);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -533,22 +509,20 @@ static void test_multiple_reclaims_can_be_triggered(void) {
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, false,
-        make_reclaimer(usr, 512, set_event(&benign_done)));
+        usr, false, make_reclaimer(usr, 512, set_event(&benign_done)));
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, true,
-        make_reclaimer(usr, 512, set_event(&destructive_done)));
-    grpc_exec_ctx_finish(&exec_ctx);
+        usr, true, make_reclaimer(usr, 512, set_event(&destructive_done)));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&benign_done,
                               grpc_timeout_milliseconds_to_deadline(100)) ==
                nullptr);
@@ -559,9 +533,9 @@ static void test_multiple_reclaims_can_be_triggered(void) {
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&benign_done,
                               grpc_timeout_seconds_to_deadline(5)) != nullptr);
     GPR_ASSERT(gpr_event_wait(&destructive_done,
@@ -571,9 +545,8 @@ static void test_multiple_reclaims_can_be_triggered(void) {
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -591,20 +564,17 @@ static void test_resource_user_stays_allocated_until_memory_released(void) {
   grpc_resource_quota_resize(q, 1024 * 1024);
   grpc_resource_user* usr = grpc_resource_user_create(q, "usr");
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, nullptr);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, NULL);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_quota_unref(q);
-    grpc_resource_user_unref(&exec_ctx, usr);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_resource_user_unref(usr);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
 }
 
@@ -624,11 +594,10 @@ test_resource_user_stays_allocated_and_reclaimers_unrun_until_memory_released(
     gpr_event reclaimer_cancelled;
     gpr_event_init(&reclaimer_cancelled);
     {
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+      grpc_core::ExecCtx exec_ctx;
       grpc_resource_user_post_reclaimer(
-          &exec_ctx, usr, false,
-          make_unused_reclaimer(set_event(&reclaimer_cancelled)));
-      grpc_exec_ctx_finish(&exec_ctx);
+          usr, false, make_unused_reclaimer(set_event(&reclaimer_cancelled)));
+      grpc_core::ExecCtx::Get()->Flush();
       GPR_ASSERT(gpr_event_wait(&reclaimer_cancelled,
                                 grpc_timeout_milliseconds_to_deadline(100)) ==
                  nullptr);
@@ -636,27 +605,27 @@ test_resource_user_stays_allocated_and_reclaimers_unrun_until_memory_released(
     {
       gpr_event allocated;
       gpr_event_init(&allocated);
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-      grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&allocated));
-      grpc_exec_ctx_finish(&exec_ctx);
-      GPR_ASSERT(gpr_event_wait(&allocated, grpc_timeout_seconds_to_deadline(
-                                                5)) != nullptr);
+      grpc_core::ExecCtx exec_ctx;
+      grpc_resource_user_alloc(usr, 1024, set_event(&allocated));
+      grpc_core::ExecCtx::Get()->Flush();
+      GPR_ASSERT(gpr_event_wait(&allocated,
+                                grpc_timeout_seconds_to_deadline(5)) != NULL);
       GPR_ASSERT(gpr_event_wait(&reclaimer_cancelled,
                                 grpc_timeout_milliseconds_to_deadline(100)) ==
                  nullptr);
     }
     {
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-      grpc_resource_user_unref(&exec_ctx, usr);
-      grpc_exec_ctx_finish(&exec_ctx);
+      grpc_core::ExecCtx exec_ctx;
+      grpc_resource_user_unref(usr);
+      grpc_core::ExecCtx::Get()->Flush();
       GPR_ASSERT(gpr_event_wait(&reclaimer_cancelled,
                                 grpc_timeout_milliseconds_to_deadline(100)) ==
                  nullptr);
     }
     {
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-      grpc_resource_user_free(&exec_ctx, usr, 1024);
-      grpc_exec_ctx_finish(&exec_ctx);
+      grpc_core::ExecCtx exec_ctx;
+      grpc_resource_user_free(usr, 1024);
+      grpc_core::ExecCtx::Get()->Flush();
       GPR_ASSERT(gpr_event_wait(&reclaimer_cancelled,
                                 grpc_timeout_seconds_to_deadline(5)) !=
                  nullptr);
@@ -674,9 +643,9 @@ static void test_reclaimers_can_be_posted_repeatedly(void) {
   {
     gpr_event allocated;
     gpr_event_init(&allocated);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&allocated));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&allocated));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&allocated,
                               grpc_timeout_seconds_to_deadline(5)) != nullptr);
   }
@@ -684,11 +653,10 @@ static void test_reclaimers_can_be_posted_repeatedly(void) {
     gpr_event reclaimer_done;
     gpr_event_init(&reclaimer_done);
     {
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+      grpc_core::ExecCtx exec_ctx;
       grpc_resource_user_post_reclaimer(
-          &exec_ctx, usr, false,
-          make_reclaimer(usr, 1024, set_event(&reclaimer_done)));
-      grpc_exec_ctx_finish(&exec_ctx);
+          usr, false, make_reclaimer(usr, 1024, set_event(&reclaimer_done)));
+      grpc_core::ExecCtx::Get()->Flush();
       GPR_ASSERT(gpr_event_wait(&reclaimer_done,
                                 grpc_timeout_milliseconds_to_deadline(100)) ==
                  nullptr);
@@ -696,20 +664,19 @@ static void test_reclaimers_can_be_posted_repeatedly(void) {
     {
       gpr_event allocated;
       gpr_event_init(&allocated);
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-      grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&allocated));
-      grpc_exec_ctx_finish(&exec_ctx);
-      GPR_ASSERT(gpr_event_wait(&allocated, grpc_timeout_seconds_to_deadline(
-                                                5)) != nullptr);
+      grpc_core::ExecCtx exec_ctx;
+      grpc_resource_user_alloc(usr, 1024, set_event(&allocated));
+      grpc_core::ExecCtx::Get()->Flush();
+      GPR_ASSERT(gpr_event_wait(&allocated,
+                                grpc_timeout_seconds_to_deadline(5)) != NULL);
       GPR_ASSERT(gpr_event_wait(&reclaimer_done,
                                 grpc_timeout_seconds_to_deadline(5)) !=
                  nullptr);
     }
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   destroy_user(usr);
   grpc_resource_quota_unref(q);
@@ -732,16 +699,15 @@ static void test_one_slice(void) {
 
   {
     const int start_allocs = num_allocs;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc_slices(&exec_ctx, &alloc, 1024, 1, &buffer);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc_slices(&alloc, 1024, 1, &buffer);
+    grpc_core::ExecCtx::Get()->Flush();
     assert_counter_becomes(&num_allocs, start_allocs + 1);
   }
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_slice_buffer_destroy_internal(&buffer);
   }
   destroy_user(usr);
   grpc_resource_quota_unref(q);
@@ -765,23 +731,21 @@ static void test_one_slice_deleted_late(void) {
 
   {
     const int start_allocs = num_allocs;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc_slices(&exec_ctx, &alloc, 1024, 1, &buffer);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc_slices(&alloc, 1024, 1, &buffer);
+    grpc_core::ExecCtx::Get()->Flush();
     assert_counter_becomes(&num_allocs, start_allocs + 1);
   }
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_unref(&exec_ctx, usr);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_unref(usr);
   }
 
   grpc_resource_quota_unref(q);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_slice_buffer_destroy_internal(&buffer);
   }
 }
 
@@ -809,9 +773,9 @@ static void test_negative_rq_free_pool(void) {
 
   {
     const int start_allocs = num_allocs;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc_slices(&exec_ctx, &alloc, 1024, 1, &buffer);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc_slices(&alloc, 1024, 1, &buffer);
+    grpc_core::ExecCtx::Get()->Flush();
     assert_counter_becomes(&num_allocs, start_allocs + 1);
   }
 
@@ -822,16 +786,14 @@ static void test_negative_rq_free_pool(void) {
   GPR_ASSERT(grpc_resource_quota_get_memory_pressure(q) > 1 - eps);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_unref(&exec_ctx, usr);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_unref(usr);
   }
 
   grpc_resource_quota_unref(q);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_slice_buffer_destroy_internal(&buffer);
   }
 }
 
diff --git a/test/core/iomgr/tcp_client_posix_test.cc b/test/core/iomgr/tcp_client_posix_test.cc
index 9fb1a2d770..40a050ed9f 100644
--- a/test/core/iomgr/tcp_client_posix_test.cc
+++ b/test/core/iomgr/tcp_client_posix_test.cc
@@ -53,26 +53,24 @@ static grpc_millis test_deadline(void) {
 static void finish_connection() {
   gpr_mu_lock(g_mu);
   g_connections_complete++;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(&exec_ctx, g_pollset, nullptr)));
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
+
   gpr_mu_unlock(g_mu);
 }
 
-static void must_succeed(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
+static void must_succeed(void* arg, grpc_error* error) {
   GPR_ASSERT(g_connecting != nullptr);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
-  grpc_endpoint_shutdown(
-      exec_ctx, g_connecting,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("must_succeed called"));
-  grpc_endpoint_destroy(exec_ctx, g_connecting);
+  grpc_endpoint_shutdown(g_connecting, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                           "must_succeed called"));
+  grpc_endpoint_destroy(g_connecting);
   g_connecting = nullptr;
   finish_connection();
 }
 
-static void must_fail(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void must_fail(void* arg, grpc_error* error) {
   GPR_ASSERT(g_connecting == nullptr);
   GPR_ASSERT(error != GRPC_ERROR_NONE);
   finish_connection();
@@ -85,7 +83,7 @@ void test_succeeds(void) {
   int r;
   int connections_complete_before;
   grpc_closure done;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_DEBUG, "test_succeeds");
 
@@ -108,8 +106,8 @@ void test_succeeds(void) {
   GPR_ASSERT(getsockname(svr_fd, (struct sockaddr*)addr,
                          (socklen_t*)&resolved_addr.len) == 0);
   GRPC_CLOSURE_INIT(&done, must_succeed, nullptr, grpc_schedule_on_exec_ctx);
-  grpc_tcp_client_connect(&exec_ctx, &done, &g_connecting, g_pollset_set,
-                          nullptr, &resolved_addr, GRPC_MILLIS_INF_FUTURE);
+  grpc_tcp_client_connect(&done, &g_connecting, g_pollset_set, nullptr,
+                          &resolved_addr, GRPC_MILLIS_INF_FUTURE);
 
   /* await the connection */
   do {
@@ -125,17 +123,15 @@ void test_succeeds(void) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
         "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker,
+        grpc_pollset_work(g_pollset, &worker,
                           grpc_timespec_to_millis_round_up(
                               grpc_timeout_seconds_to_deadline(5)))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
 
   gpr_mu_unlock(g_mu);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void test_fails(void) {
@@ -143,7 +139,7 @@ void test_fails(void) {
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   int connections_complete_before;
   grpc_closure done;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_DEBUG, "test_fails");
 
@@ -157,8 +153,8 @@ void test_fails(void) {
 
   /* connect to a broken address */
   GRPC_CLOSURE_INIT(&done, must_fail, nullptr, grpc_schedule_on_exec_ctx);
-  grpc_tcp_client_connect(&exec_ctx, &done, &g_connecting, g_pollset_set,
-                          nullptr, &resolved_addr, GRPC_MILLIS_INF_FUTURE);
+  grpc_tcp_client_connect(&done, &g_connecting, g_pollset_set, nullptr,
+                          &resolved_addr, GRPC_MILLIS_INF_FUTURE);
 
   gpr_mu_lock(g_mu);
 
@@ -166,7 +162,7 @@ void test_fails(void) {
   while (g_connections_complete == connections_complete_before) {
     grpc_pollset_worker* worker = nullptr;
     grpc_millis polling_deadline = test_deadline();
-    switch (grpc_timer_check(&exec_ctx, &polling_deadline)) {
+    switch (grpc_timer_check(&polling_deadline)) {
       case GRPC_TIMERS_FIRED:
         break;
       case GRPC_TIMERS_NOT_CHECKED:
@@ -174,42 +170,43 @@ void test_fails(void) {
       /* fall through */
       case GRPC_TIMERS_CHECKED_AND_EMPTY:
         GPR_ASSERT(GRPC_LOG_IF_ERROR(
-            "pollset_work", grpc_pollset_work(&exec_ctx, g_pollset, &worker,
-                                              polling_deadline)));
+            "pollset_work",
+            grpc_pollset_work(g_pollset, &worker, polling_deadline)));
         break;
     }
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
 
   gpr_mu_unlock(g_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset_set = grpc_pollset_set_create();
-  g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
-  grpc_pollset_init(g_pollset, &g_mu);
-  grpc_pollset_set_add_pollset(&exec_ctx, g_pollset_set, g_pollset);
-  grpc_exec_ctx_finish(&exec_ctx);
-  test_succeeds();
-  gpr_log(GPR_ERROR, "End of first test");
-  test_fails();
-  grpc_pollset_set_destroy(&exec_ctx, g_pollset_set);
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset_set = grpc_pollset_set_create();
+    g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
+    grpc_pollset_init(g_pollset, &g_mu);
+    grpc_pollset_set_add_pollset(g_pollset_set, g_pollset);
+
+    test_succeeds();
+    gpr_log(GPR_ERROR, "End of first test");
+    test_fails();
+    grpc_pollset_set_destroy(g_pollset_set);
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
+  }
+
   grpc_shutdown();
   gpr_free(g_pollset);
   return 0;
diff --git a/test/core/iomgr/tcp_client_uv_test.cc b/test/core/iomgr/tcp_client_uv_test.cc
index 101d7bf6b5..0c6250ed7f 100644
--- a/test/core/iomgr/tcp_client_uv_test.cc
+++ b/test/core/iomgr/tcp_client_uv_test.cc
@@ -46,30 +46,28 @@ static grpc_millis test_deadline(void) {
   return grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(10));
 }
 
-static void finish_connection(grpc_exec_ctx* exec_ctx) {
+static void finish_connection() {
   gpr_mu_lock(g_mu);
   g_connections_complete++;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
-                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
-static void must_succeed(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
+static void must_succeed(void* arg, grpc_error* error) {
   GPR_ASSERT(g_connecting != NULL);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
-  grpc_endpoint_shutdown(
-      exec_ctx, g_connecting,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("must_succeed called"));
-  grpc_endpoint_destroy(exec_ctx, g_connecting);
+  grpc_endpoint_shutdown(g_connecting, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                           "must_succeed called"));
+  grpc_endpoint_destroy(g_connecting);
   g_connecting = NULL;
-  finish_connection(exec_ctx);
+  finish_connection();
 }
 
-static void must_fail(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void must_fail(void* arg, grpc_error* error) {
   GPR_ASSERT(g_connecting == NULL);
   GPR_ASSERT(error != GRPC_ERROR_NONE);
-  finish_connection(exec_ctx);
+  finish_connection();
 }
 
 static void close_cb(uv_handle_t* handle) { gpr_free(handle); }
@@ -89,7 +87,7 @@ void test_succeeds(void) {
   uv_tcp_t* svr_handle = static_cast<uv_tcp_t*>(gpr_malloc(sizeof(uv_tcp_t)));
   int connections_complete_before;
   grpc_closure done;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_DEBUG, "test_succeeds");
 
@@ -110,8 +108,8 @@ void test_succeeds(void) {
   GPR_ASSERT(uv_tcp_getsockname(svr_handle, (struct sockaddr*)addr,
                                 (int*)&resolved_addr.len) == 0);
   GRPC_CLOSURE_INIT(&done, must_succeed, NULL, grpc_schedule_on_exec_ctx);
-  grpc_tcp_client_connect(&exec_ctx, &done, &g_connecting, NULL, NULL,
-                          &resolved_addr, GRPC_MILLIS_INF_FUTURE);
+  grpc_tcp_client_connect(&done, &g_connecting, NULL, NULL, &resolved_addr,
+                          GRPC_MILLIS_INF_FUTURE);
 
   gpr_mu_lock(g_mu);
 
@@ -119,11 +117,11 @@ void test_succeeds(void) {
     grpc_pollset_worker* worker = NULL;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
         "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker,
+        grpc_pollset_work(g_pollset, &worker,
                           grpc_timespec_to_millis_round_up(
                               grpc_timeout_seconds_to_deadline(5)))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
 
@@ -131,8 +129,6 @@ void test_succeeds(void) {
   uv_close((uv_handle_t*)svr_handle, close_cb);
 
   gpr_mu_unlock(g_mu);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void test_fails(void) {
@@ -140,7 +136,7 @@ void test_fails(void) {
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   int connections_complete_before;
   grpc_closure done;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_DEBUG, "test_fails");
 
@@ -154,8 +150,8 @@ void test_fails(void) {
 
   /* connect to a broken address */
   GRPC_CLOSURE_INIT(&done, must_fail, NULL, grpc_schedule_on_exec_ctx);
-  grpc_tcp_client_connect(&exec_ctx, &done, &g_connecting, NULL, NULL,
-                          &resolved_addr, GRPC_MILLIS_INF_FUTURE);
+  grpc_tcp_client_connect(&done, &g_connecting, NULL, NULL, &resolved_addr,
+                          GRPC_MILLIS_INF_FUTURE);
 
   gpr_mu_lock(g_mu);
 
@@ -164,7 +160,7 @@ void test_fails(void) {
     grpc_pollset_worker* worker = NULL;
     gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
     grpc_millis polling_deadline = test_deadline();
-    switch (grpc_timer_check(&exec_ctx, &polling_deadline)) {
+    switch (grpc_timer_check(&polling_deadline)) {
       case GRPC_TIMERS_FIRED:
         break;
       case GRPC_TIMERS_NOT_CHECKED:
@@ -172,39 +168,37 @@ void test_fails(void) {
       /* fall through */
       case GRPC_TIMERS_CHECKED_AND_EMPTY:
         GPR_ASSERT(GRPC_LOG_IF_ERROR(
-            "pollset_work", grpc_pollset_work(&exec_ctx, g_pollset, &worker,
-                                              polling_deadline)));
+            "pollset_work",
+            grpc_pollset_work(g_pollset, &worker, polling_deadline)));
         break;
     }
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
 
   gpr_mu_unlock(g_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_test_init(argc, argv);
   grpc_init();
   g_pollset = static_cast<grpc_pollset*>(gpr_malloc(grpc_pollset_size()));
   grpc_pollset_init(g_pollset, &g_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   test_succeeds();
   gpr_log(GPR_ERROR, "End of first test");
   test_fails();
   GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_pollset_shutdown(g_pollset, &destroyed);
+
   grpc_shutdown();
   gpr_free(g_pollset);
   return 0;
diff --git a/test/core/iomgr/tcp_posix_test.cc b/test/core/iomgr/tcp_posix_test.cc
index 7986dc2b19..f4acba8302 100644
--- a/test/core/iomgr/tcp_posix_test.cc
+++ b/test/core/iomgr/tcp_posix_test.cc
@@ -131,8 +131,7 @@ static size_t count_slices(grpc_slice* slices, size_t nslices,
   return num_bytes;
 }
 
-static void read_cb(grpc_exec_ctx* exec_ctx, void* user_data,
-                    grpc_error* error) {
+static void read_cb(void* user_data, grpc_error* error) {
   struct read_socket_state* state = (struct read_socket_state*)user_data;
   size_t read_bytes;
   int current_data;
@@ -147,11 +146,11 @@ static void read_cb(grpc_exec_ctx* exec_ctx, void* user_data,
   gpr_log(GPR_INFO, "Read %" PRIuPTR " bytes of %" PRIuPTR, read_bytes,
           state->target_read_bytes);
   if (state->read_bytes >= state->target_read_bytes) {
-    GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+    GPR_ASSERT(
+        GRPC_LOG_IF_ERROR("kick", grpc_pollset_kick(g_pollset, nullptr)));
     gpr_mu_unlock(g_mu);
   } else {
-    grpc_endpoint_read(exec_ctx, state->ep, &state->incoming, &state->read_cb);
+    grpc_endpoint_read(state->ep, &state->incoming, &state->read_cb);
     gpr_mu_unlock(g_mu);
   }
 }
@@ -164,7 +163,7 @@ static void read_test(size_t num_bytes, size_t slice_size) {
   size_t written_bytes;
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(20));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_INFO, "Read test of size %" PRIuPTR ", slice size %" PRIuPTR,
           num_bytes, slice_size);
@@ -175,9 +174,8 @@ static void read_test(size_t num_bytes, size_t slice_size) {
   a[0].key = const_cast<char*>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
   a[0].type = GRPC_ARG_INTEGER, a[0].value.integer = (int)slice_size;
   grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
-  ep = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], "read_test"), &args,
-                       "test");
-  grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
+  ep = grpc_tcp_create(grpc_fd_create(sv[1], "read_test"), &args, "test");
+  grpc_endpoint_add_to_pollset(ep, g_pollset);
 
   written_bytes = fill_socket_partial(sv[0], num_bytes);
   gpr_log(GPR_INFO, "Wrote %" PRIuPTR " bytes", written_bytes);
@@ -188,24 +186,22 @@ static void read_test(size_t num_bytes, size_t slice_size) {
   grpc_slice_buffer_init(&state.incoming);
   GRPC_CLOSURE_INIT(&state.read_cb, read_cb, &state, grpc_schedule_on_exec_ctx);
 
-  grpc_endpoint_read(&exec_ctx, ep, &state.incoming, &state.read_cb);
+  grpc_endpoint_read(ep, &state.incoming, &state.read_cb);
 
   gpr_mu_lock(g_mu);
   while (state.read_bytes < state.target_read_bytes) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   GPR_ASSERT(state.read_bytes == state.target_read_bytes);
   gpr_mu_unlock(g_mu);
 
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.incoming);
-  grpc_endpoint_destroy(&exec_ctx, ep);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_buffer_destroy_internal(&state.incoming);
+  grpc_endpoint_destroy(ep);
 }
 
 /* Write to a socket until it fills up, then read from it using the grpc_tcp
@@ -217,7 +213,7 @@ static void large_read_test(size_t slice_size) {
   ssize_t written_bytes;
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(20));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_INFO, "Start large read test, slice size %" PRIuPTR, slice_size);
 
@@ -228,9 +224,8 @@ static void large_read_test(size_t slice_size) {
   a[0].type = GRPC_ARG_INTEGER;
   a[0].value.integer = (int)slice_size;
   grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
-  ep = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], "large_read_test"),
-                       &args, "test");
-  grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
+  ep = grpc_tcp_create(grpc_fd_create(sv[1], "large_read_test"), &args, "test");
+  grpc_endpoint_add_to_pollset(ep, g_pollset);
 
   written_bytes = fill_socket(sv[0]);
   gpr_log(GPR_INFO, "Wrote %" PRIuPTR " bytes", written_bytes);
@@ -241,24 +236,22 @@ static void large_read_test(size_t slice_size) {
   grpc_slice_buffer_init(&state.incoming);
   GRPC_CLOSURE_INIT(&state.read_cb, read_cb, &state, grpc_schedule_on_exec_ctx);
 
-  grpc_endpoint_read(&exec_ctx, ep, &state.incoming, &state.read_cb);
+  grpc_endpoint_read(ep, &state.incoming, &state.read_cb);
 
   gpr_mu_lock(g_mu);
   while (state.read_bytes < state.target_read_bytes) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   GPR_ASSERT(state.read_bytes == state.target_read_bytes);
   gpr_mu_unlock(g_mu);
 
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.incoming);
-  grpc_endpoint_destroy(&exec_ctx, ep);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_buffer_destroy_internal(&state.incoming);
+  grpc_endpoint_destroy(ep);
 }
 
 struct write_socket_state {
@@ -289,16 +282,15 @@ static grpc_slice* allocate_blocks(size_t num_bytes, size_t slice_size,
   return slices;
 }
 
-static void write_done(grpc_exec_ctx* exec_ctx,
-                       void* user_data /* write_socket_state */,
+static void write_done(void* user_data /* write_socket_state */,
                        grpc_error* error) {
   struct write_socket_state* state = (struct write_socket_state*)user_data;
   gpr_log(GPR_INFO, "Write done callback called");
   gpr_mu_lock(g_mu);
   gpr_log(GPR_INFO, "Signalling write done");
   state->write_done = 1;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
@@ -309,7 +301,7 @@ void drain_socket_blocking(int fd, size_t num_bytes, size_t read_size) {
   int flags;
   int current = 0;
   int i;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   flags = fcntl(fd, F_GETFL, 0);
   GPR_ASSERT(fcntl(fd, F_SETFL, flags & ~O_NONBLOCK) == 0);
@@ -319,11 +311,11 @@ void drain_socket_blocking(int fd, size_t num_bytes, size_t read_size) {
     gpr_mu_lock(g_mu);
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
         "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker,
+        grpc_pollset_work(g_pollset, &worker,
                           grpc_timespec_to_millis_round_up(
                               grpc_timeout_milliseconds_to_deadline(10)))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     do {
       bytes_read =
           read(fd, buf, bytes_left > read_size ? read_size : bytes_left);
@@ -356,7 +348,7 @@ static void write_test(size_t num_bytes, size_t slice_size) {
   grpc_closure write_done_closure;
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(20));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_INFO,
           "Start write test with %" PRIuPTR " bytes, slice size %" PRIuPTR,
@@ -368,9 +360,8 @@ static void write_test(size_t num_bytes, size_t slice_size) {
   a[0].key = const_cast<char*>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
   a[0].type = GRPC_ARG_INTEGER, a[0].value.integer = (int)slice_size;
   grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
-  ep = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], "write_test"), &args,
-                       "test");
-  grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
+  ep = grpc_tcp_create(grpc_fd_create(sv[1], "write_test"), &args, "test");
+  grpc_endpoint_add_to_pollset(ep, g_pollset);
 
   state.ep = ep;
   state.write_done = 0;
@@ -382,7 +373,7 @@ static void write_test(size_t num_bytes, size_t slice_size) {
   GRPC_CLOSURE_INIT(&write_done_closure, write_done, &state,
                     grpc_schedule_on_exec_ctx);
 
-  grpc_endpoint_write(&exec_ctx, ep, &outgoing, &write_done_closure);
+  grpc_endpoint_write(ep, &outgoing, &write_done_closure);
   drain_socket_blocking(sv[0], num_bytes, num_bytes);
   gpr_mu_lock(g_mu);
   for (;;) {
@@ -391,25 +382,23 @@ static void write_test(size_t num_bytes, size_t slice_size) {
       break;
     }
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
 
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &outgoing);
-  grpc_endpoint_destroy(&exec_ctx, ep);
+  grpc_slice_buffer_destroy_internal(&outgoing);
+  grpc_endpoint_destroy(ep);
   gpr_free(slices);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-void on_fd_released(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* errors) {
+void on_fd_released(void* arg, grpc_error* errors) {
   int* done = (int*)arg;
   *done = 1;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
 }
 
 /* Do a read_test, then release fd and try to read/write again. Verify that
@@ -422,7 +411,7 @@ static void release_fd_test(size_t num_bytes, size_t slice_size) {
   int fd;
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(20));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_closure fd_released_cb;
   int fd_released_done = 0;
   GRPC_CLOSURE_INIT(&fd_released_cb, &on_fd_released, &fd_released_done,
@@ -439,10 +428,9 @@ static void release_fd_test(size_t num_bytes, size_t slice_size) {
   a[0].type = GRPC_ARG_INTEGER;
   a[0].value.integer = (int)slice_size;
   grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
-  ep = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], "read_test"), &args,
-                       "test");
+  ep = grpc_tcp_create(grpc_fd_create(sv[1], "read_test"), &args, "test");
   GPR_ASSERT(grpc_tcp_fd(ep) == sv[1] && sv[1] >= 0);
-  grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
+  grpc_endpoint_add_to_pollset(ep, g_pollset);
 
   written_bytes = fill_socket_partial(sv[0], num_bytes);
   gpr_log(GPR_INFO, "Wrote %" PRIuPTR " bytes", written_bytes);
@@ -453,38 +441,35 @@ static void release_fd_test(size_t num_bytes, size_t slice_size) {
   grpc_slice_buffer_init(&state.incoming);
   GRPC_CLOSURE_INIT(&state.read_cb, read_cb, &state, grpc_schedule_on_exec_ctx);
 
-  grpc_endpoint_read(&exec_ctx, ep, &state.incoming, &state.read_cb);
+  grpc_endpoint_read(ep, &state.incoming, &state.read_cb);
 
   gpr_mu_lock(g_mu);
   while (state.read_bytes < state.target_read_bytes) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
     gpr_log(GPR_DEBUG, "wakeup: read=%" PRIdPTR " target=%" PRIdPTR,
             state.read_bytes, state.target_read_bytes);
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
   GPR_ASSERT(state.read_bytes == state.target_read_bytes);
   gpr_mu_unlock(g_mu);
 
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.incoming);
-  grpc_tcp_destroy_and_release_fd(&exec_ctx, ep, &fd, &fd_released_cb);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_slice_buffer_destroy_internal(&state.incoming);
+  grpc_tcp_destroy_and_release_fd(ep, &fd, &fd_released_cb);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_mu_lock(g_mu);
   while (!fd_released_done) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
     gpr_log(GPR_DEBUG, "wakeup: fd_released_done=%d", fd_released_done);
   }
   gpr_mu_unlock(g_mu);
   GPR_ASSERT(fd_released_done == 1);
   GPR_ASSERT(fd == sv[1]);
-  grpc_exec_ctx_finish(&exec_ctx);
 
   written_bytes = fill_socket_partial(sv[0], num_bytes);
   drain_socket_blocking(fd, written_bytes, written_bytes);
@@ -522,7 +507,7 @@ static grpc_endpoint_test_fixture create_fixture_tcp_socketpair(
     size_t slice_size) {
   int sv[2];
   grpc_endpoint_test_fixture f;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   create_sockets(sv);
   grpc_resource_quota* resource_quota =
@@ -532,15 +517,13 @@ static grpc_endpoint_test_fixture create_fixture_tcp_socketpair(
   a[0].type = GRPC_ARG_INTEGER;
   a[0].value.integer = (int)slice_size;
   grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
-  f.client_ep = grpc_tcp_create(
-      &exec_ctx, grpc_fd_create(sv[0], "fixture:client"), &args, "test");
-  f.server_ep = grpc_tcp_create(
-      &exec_ctx, grpc_fd_create(sv[1], "fixture:server"), &args, "test");
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
-  grpc_endpoint_add_to_pollset(&exec_ctx, f.client_ep, g_pollset);
-  grpc_endpoint_add_to_pollset(&exec_ctx, f.server_ep, g_pollset);
-
-  grpc_exec_ctx_finish(&exec_ctx);
+  f.client_ep =
+      grpc_tcp_create(grpc_fd_create(sv[0], "fixture:client"), &args, "test");
+  f.server_ep =
+      grpc_tcp_create(grpc_fd_create(sv[1], "fixture:server"), &args, "test");
+  grpc_resource_quota_unref_internal(resource_quota);
+  grpc_endpoint_add_to_pollset(f.client_ep, g_pollset);
+  grpc_endpoint_add_to_pollset(f.server_ep, g_pollset);
 
   return f;
 }
@@ -549,24 +532,26 @@ static grpc_endpoint_test_config configs[] = {
     {"tcp/tcp_socketpair", create_fixture_tcp_socketpair, clean_up},
 };
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, (grpc_pollset*)p);
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy((grpc_pollset*)p);
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
-  grpc_pollset_init(g_pollset, &g_mu);
-  grpc_endpoint_tests(configs[0], g_pollset, g_mu);
-  run_tests();
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
+    grpc_pollset_init(g_pollset, &g_mu);
+    grpc_endpoint_tests(configs[0], g_pollset, g_mu);
+    run_tests();
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
+
+    grpc_core::ExecCtx::Get()->Flush();
+  }
   grpc_shutdown();
   gpr_free(g_pollset);
 
diff --git a/test/core/iomgr/tcp_server_posix_test.cc b/test/core/iomgr/tcp_server_posix_test.cc
index 48d8d425a5..3c9ca2109e 100644
--- a/test/core/iomgr/tcp_server_posix_test.cc
+++ b/test/core/iomgr/tcp_server_posix_test.cc
@@ -110,8 +110,7 @@ static void on_connect_result_set(on_connect_result* result,
       result->server, acceptor->port_index, acceptor->fd_index);
 }
 
-static void server_weak_ref_shutdown(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* error) {
+static void server_weak_ref_shutdown(void* arg, grpc_error* error) {
   server_weak_ref* weak_ref = static_cast<server_weak_ref*>(arg);
   weak_ref->server = nullptr;
 }
@@ -145,12 +144,11 @@ static void test_addr_init_str(test_addr* addr) {
   }
 }
 
-static void on_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
-                       grpc_pollset* pollset,
+static void on_connect(void* arg, grpc_endpoint* tcp, grpc_pollset* pollset,
                        grpc_tcp_server_acceptor* acceptor) {
-  grpc_endpoint_shutdown(exec_ctx, tcp,
+  grpc_endpoint_shutdown(tcp,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Connected"));
-  grpc_endpoint_destroy(exec_ctx, tcp);
+  grpc_endpoint_destroy(tcp);
 
   on_connect_result temp_result;
   on_connect_result_set(&temp_result, acceptor);
@@ -159,38 +157,33 @@ static void on_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
   gpr_mu_lock(g_mu);
   g_result = temp_result;
   g_nconnects++;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
 static void test_no_op(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, nullptr, nullptr, &s));
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(nullptr, nullptr, &s));
+  grpc_tcp_server_unref(s);
 }
 
 static void test_no_op_with_start(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, nullptr, nullptr, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(nullptr, nullptr, &s));
   LOG_TEST("test_no_op_with_start");
-  grpc_tcp_server_start(&exec_ctx, s, nullptr, 0, on_connect, nullptr);
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_start(s, nullptr, 0, on_connect, nullptr);
+  grpc_tcp_server_unref(s);
 }
 
 static void test_no_op_with_port(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, nullptr, nullptr, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(nullptr, nullptr, &s));
   LOG_TEST("test_no_op_with_port");
 
   memset(&resolved_addr, 0, sizeof(resolved_addr));
@@ -201,17 +194,15 @@ static void test_no_op_with_port(void) {
                  GRPC_ERROR_NONE &&
              port > 0);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
 }
 
 static void test_no_op_with_port_and_start(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, nullptr, nullptr, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(nullptr, nullptr, &s));
   LOG_TEST("test_no_op_with_port_and_start");
   int port = -1;
 
@@ -222,13 +213,12 @@ static void test_no_op_with_port_and_start(void) {
                  GRPC_ERROR_NONE &&
              port > 0);
 
-  grpc_tcp_server_start(&exec_ctx, s, nullptr, 0, on_connect, nullptr);
+  grpc_tcp_server_start(s, nullptr, 0, on_connect, nullptr);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
 }
 
-static grpc_error* tcp_connect(grpc_exec_ctx* exec_ctx, const test_addr* remote,
+static grpc_error* tcp_connect(const test_addr* remote,
                                on_connect_result* result) {
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(10));
@@ -254,17 +244,17 @@ static grpc_error* tcp_connect(grpc_exec_ctx* exec_ctx, const test_addr* remote,
   }
   gpr_log(GPR_DEBUG, "wait");
   while (g_nconnects == nconnects_before &&
-         deadline > grpc_exec_ctx_now(exec_ctx)) {
+         deadline > grpc_core::ExecCtx::Get()->Now()) {
     grpc_pollset_worker* worker = nullptr;
     grpc_error* err;
-    if ((err = grpc_pollset_work(exec_ctx, g_pollset, &worker, deadline)) !=
+    if ((err = grpc_pollset_work(g_pollset, &worker, deadline)) !=
         GRPC_ERROR_NONE) {
       gpr_mu_unlock(g_mu);
       close(clifd);
       return err;
     }
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_log(GPR_DEBUG, "wait done");
@@ -279,7 +269,7 @@ static grpc_error* tcp_connect(grpc_exec_ctx* exec_ctx, const test_addr* remote,
   gpr_mu_unlock(g_mu);
   gpr_log(GPR_INFO, "Result (%d, %d) fd %d", result->port_index,
           result->fd_index, result->server_fd);
-  grpc_tcp_server_unref(exec_ctx, result->server);
+  grpc_tcp_server_unref(result->server);
   return GRPC_ERROR_NONE;
 }
 
@@ -292,7 +282,7 @@ static grpc_error* tcp_connect(grpc_exec_ctx* exec_ctx, const test_addr* remote,
 static void test_connect(size_t num_connects,
                          const grpc_channel_args* channel_args,
                          test_addrs* dst_addrs, bool test_dst_addrs) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   grpc_resolved_address resolved_addr1;
   struct sockaddr_storage* const addr =
@@ -307,7 +297,7 @@ static void test_connect(size_t num_connects,
   grpc_tcp_server* s;
   const unsigned num_ports = 2;
   GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, nullptr, channel_args, &s));
+             grpc_tcp_server_create(nullptr, channel_args, &s));
   unsigned port_num;
   server_weak_ref weak_ref;
   server_weak_ref_init(&weak_ref);
@@ -352,7 +342,7 @@ static void test_connect(size_t num_connects,
   svr1_fd_count = grpc_tcp_server_port_fd_count(s, 1);
   GPR_ASSERT(svr1_fd_count >= 1);
 
-  grpc_tcp_server_start(&exec_ctx, s, &g_pollset, 1, on_connect, nullptr);
+  grpc_tcp_server_start(s, &g_pollset, 1, on_connect, nullptr);
 
   if (dst_addrs != nullptr) {
     int ports[] = {svr_port, svr1_port};
@@ -372,7 +362,7 @@ static void test_connect(size_t num_connects,
         test_addr_init_str(&dst);
         ++num_tested;
         on_connect_result_init(&result);
-        if ((err = tcp_connect(&exec_ctx, &dst, &result)) == GRPC_ERROR_NONE &&
+        if ((err = tcp_connect(&dst, &result)) == GRPC_ERROR_NONE &&
             result.server_fd >= 0 && result.server == s) {
           continue;
         }
@@ -403,8 +393,8 @@ static void test_connect(size_t num_connects,
         for (connect_num = 0; connect_num < num_connects; ++connect_num) {
           on_connect_result result;
           on_connect_result_init(&result);
-          GPR_ASSERT(GRPC_LOG_IF_ERROR("tcp_connect",
-                                       tcp_connect(&exec_ctx, &dst, &result)));
+          GPR_ASSERT(
+              GRPC_LOG_IF_ERROR("tcp_connect", tcp_connect(&dst, &result)));
           GPR_ASSERT(result.server_fd == fd);
           GPR_ASSERT(result.port_index == port_num);
           GPR_ASSERT(result.fd_index == fd_num);
@@ -420,21 +410,19 @@ static void test_connect(size_t num_connects,
   GPR_ASSERT(weak_ref.server != nullptr);
   GPR_ASSERT(grpc_tcp_server_port_fd(s, 0, 0) >= 0);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Weak ref lost. */
   GPR_ASSERT(weak_ref.server == nullptr);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_arg chan_args[1];
   chan_args[0].type = GRPC_ARG_INTEGER;
   chan_args[0].key = const_cast<char*>(GRPC_ARG_EXPAND_WILDCARD_ADDRS);
@@ -447,58 +435,61 @@ int main(int argc, char** argv) {
       static_cast<test_addrs*>(gpr_zalloc(sizeof(*dst_addrs)));
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
-  grpc_pollset_init(g_pollset, &g_mu);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
+    grpc_pollset_init(g_pollset, &g_mu);
+
+    test_no_op();
+    test_no_op_with_start();
+    test_no_op_with_port();
+    test_no_op_with_port_and_start();
+
+    if (getifaddrs(&ifa) != 0 || ifa == nullptr) {
+      gpr_log(GPR_ERROR, "getifaddrs: %s", strerror(errno));
+      return EXIT_FAILURE;
+    }
+    dst_addrs->naddrs = 0;
+    for (ifa_it = ifa; ifa_it != nullptr && dst_addrs->naddrs < MAX_ADDRS;
+         ifa_it = ifa_it->ifa_next) {
+      if (ifa_it->ifa_addr == nullptr) {
+        continue;
+      } else if (ifa_it->ifa_addr->sa_family == AF_INET) {
+        dst_addrs->addrs[dst_addrs->naddrs].addr.len =
+            sizeof(struct sockaddr_in);
+      } else if (ifa_it->ifa_addr->sa_family == AF_INET6) {
+        dst_addrs->addrs[dst_addrs->naddrs].addr.len =
+            sizeof(struct sockaddr_in6);
+      } else {
+        continue;
+      }
+      memcpy(dst_addrs->addrs[dst_addrs->naddrs].addr.addr, ifa_it->ifa_addr,
+             dst_addrs->addrs[dst_addrs->naddrs].addr.len);
+      GPR_ASSERT(
+          grpc_sockaddr_set_port(&dst_addrs->addrs[dst_addrs->naddrs].addr, 0));
+      test_addr_init_str(&dst_addrs->addrs[dst_addrs->naddrs]);
+      ++dst_addrs->naddrs;
+    }
+    freeifaddrs(ifa);
+    ifa = nullptr;
 
-  test_no_op();
-  test_no_op_with_start();
-  test_no_op_with_port();
-  test_no_op_with_port_and_start();
+    /* Connect to same addresses as listeners. */
+    test_connect(1, nullptr, nullptr, false);
+    test_connect(10, nullptr, nullptr, false);
 
-  if (getifaddrs(&ifa) != 0 || ifa == nullptr) {
-    gpr_log(GPR_ERROR, "getifaddrs: %s", strerror(errno));
-    return EXIT_FAILURE;
-  }
-  dst_addrs->naddrs = 0;
-  for (ifa_it = ifa; ifa_it != nullptr && dst_addrs->naddrs < MAX_ADDRS;
-       ifa_it = ifa_it->ifa_next) {
-    if (ifa_it->ifa_addr == nullptr) {
-      continue;
-    } else if (ifa_it->ifa_addr->sa_family == AF_INET) {
-      dst_addrs->addrs[dst_addrs->naddrs].addr.len = sizeof(struct sockaddr_in);
-    } else if (ifa_it->ifa_addr->sa_family == AF_INET6) {
-      dst_addrs->addrs[dst_addrs->naddrs].addr.len =
-          sizeof(struct sockaddr_in6);
-    } else {
-      continue;
-    }
-    memcpy(dst_addrs->addrs[dst_addrs->naddrs].addr.addr, ifa_it->ifa_addr,
-           dst_addrs->addrs[dst_addrs->naddrs].addr.len);
-    GPR_ASSERT(
-        grpc_sockaddr_set_port(&dst_addrs->addrs[dst_addrs->naddrs].addr, 0));
-    test_addr_init_str(&dst_addrs->addrs[dst_addrs->naddrs]);
-    ++dst_addrs->naddrs;
+    /* Set dst_addrs->addrs[i].len=0 for dst_addrs that are unreachable with a
+       "::" listener. */
+    test_connect(1, nullptr, dst_addrs, true);
+
+    /* Test connect(2) with dst_addrs. */
+    test_connect(1, &channel_args, dst_addrs, false);
+    /* Test connect(2) with dst_addrs. */
+    test_connect(10, &channel_args, dst_addrs, false);
+
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
   }
-  freeifaddrs(ifa);
-  ifa = nullptr;
-
-  /* Connect to same addresses as listeners. */
-  test_connect(1, nullptr, nullptr, false);
-  test_connect(10, nullptr, nullptr, false);
-
-  /* Set dst_addrs->addrs[i].len=0 for dst_addrs that are unreachable with a
-     "::" listener. */
-  test_connect(1, nullptr, dst_addrs, true);
-
-  /* Test connect(2) with dst_addrs. */
-  test_connect(1, &channel_args, dst_addrs, false);
-  /* Test connect(2) with dst_addrs. */
-  test_connect(10, &channel_args, dst_addrs, false);
-
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   gpr_free(dst_addrs);
   gpr_free(g_pollset);
diff --git a/test/core/iomgr/tcp_server_uv_test.cc b/test/core/iomgr/tcp_server_uv_test.cc
index dd047a0498..35d62b51b7 100644
--- a/test/core/iomgr/tcp_server_uv_test.cc
+++ b/test/core/iomgr/tcp_server_uv_test.cc
@@ -74,8 +74,7 @@ static void on_connect_result_set(on_connect_result* result,
   result->fd_index = acceptor->fd_index;
 }
 
-static void server_weak_ref_shutdown(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* error) {
+static void server_weak_ref_shutdown(void* arg, grpc_error* error) {
   server_weak_ref* weak_ref = static_cast<server_weak_ref*>(arg);
   weak_ref->server = NULL;
 }
@@ -97,12 +96,11 @@ static void server_weak_ref_set(server_weak_ref* weak_ref,
   weak_ref->server = server;
 }
 
-static void on_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
-                       grpc_pollset* pollset,
+static void on_connect(void* arg, grpc_endpoint* tcp, grpc_pollset* pollset,
                        grpc_tcp_server_acceptor* acceptor) {
-  grpc_endpoint_shutdown(exec_ctx, tcp,
+  grpc_endpoint_shutdown(tcp,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Connected"));
-  grpc_endpoint_destroy(exec_ctx, tcp);
+  grpc_endpoint_destroy(tcp);
 
   on_connect_result temp_result;
   on_connect_result_set(&temp_result, acceptor);
@@ -111,38 +109,33 @@ static void on_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
   gpr_mu_lock(g_mu);
   g_result = temp_result;
   g_nconnects++;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
-                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
 static void test_no_op(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
+  grpc_tcp_server_unref(s);
 }
 
 static void test_no_op_with_start(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   LOG_TEST("test_no_op_with_start");
-  grpc_tcp_server_start(&exec_ctx, s, NULL, 0, on_connect, NULL);
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_start(s, NULL, 0, on_connect, NULL);
+  grpc_tcp_server_unref(s);
 }
 
 static void test_no_op_with_port(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   LOG_TEST("test_no_op_with_port");
 
   memset(&resolved_addr, 0, sizeof(resolved_addr));
@@ -153,17 +146,15 @@ static void test_no_op_with_port(void) {
                  GRPC_ERROR_NONE &&
              port > 0);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
 }
 
 static void test_no_op_with_port_and_start(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   LOG_TEST("test_no_op_with_port_and_start");
   int port;
 
@@ -174,10 +165,9 @@ static void test_no_op_with_port_and_start(void) {
                  GRPC_ERROR_NONE &&
              port > 0);
 
-  grpc_tcp_server_start(&exec_ctx, s, NULL, 0, on_connect, NULL);
+  grpc_tcp_server_start(s, NULL, 0, on_connect, NULL);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
 }
 
 static void connect_cb(uv_connect_t* req, int status) {
@@ -187,8 +177,8 @@ static void connect_cb(uv_connect_t* req, int status) {
 
 static void close_cb(uv_handle_t* handle) { gpr_free(handle); }
 
-static void tcp_connect(grpc_exec_ctx* exec_ctx, const struct sockaddr* remote,
-                        socklen_t remote_len, on_connect_result* result) {
+static void tcp_connect(const struct sockaddr* remote, socklen_t remote_len,
+                        on_connect_result* result) {
   gpr_timespec deadline = grpc_timeout_seconds_to_deadline(10);
   uv_tcp_t* client_handle =
       static_cast<uv_tcp_t*>(gpr_malloc(sizeof(uv_tcp_t)));
@@ -208,10 +198,10 @@ static void tcp_connect(grpc_exec_ctx* exec_ctx, const struct sockaddr* remote,
     grpc_pollset_worker* worker = NULL;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
         "pollset_work",
-        grpc_pollset_work(exec_ctx, g_pollset, &worker,
+        grpc_pollset_work(g_pollset, &worker,
                           grpc_timespec_to_millis_round_up(deadline))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_log(GPR_DEBUG, "wait done");
@@ -224,7 +214,7 @@ static void tcp_connect(grpc_exec_ctx* exec_ctx, const struct sockaddr* remote,
 
 /* Tests a tcp server with multiple ports. */
 static void test_connect(unsigned n) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   grpc_resolved_address resolved_addr1;
   struct sockaddr_storage* addr = (struct sockaddr_storage*)resolved_addr.addr;
@@ -233,8 +223,7 @@ static void test_connect(unsigned n) {
   int svr_port;
   int svr1_port;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   unsigned i;
   server_weak_ref weak_ref;
   server_weak_ref_init(&weak_ref);
@@ -257,48 +246,45 @@ static void test_connect(unsigned n) {
                  GRPC_ERROR_NONE &&
              svr_port == svr1_port);
 
-  grpc_tcp_server_start(&exec_ctx, s, &g_pollset, 1, on_connect, NULL);
+  grpc_tcp_server_start(s, &g_pollset, 1, on_connect, NULL);
 
   GPR_ASSERT(uv_ip6_addr("::", svr_port, (struct sockaddr_in6*)addr1) == 0);
 
   for (i = 0; i < n; i++) {
     on_connect_result result;
     on_connect_result_init(&result);
-    tcp_connect(&exec_ctx, (struct sockaddr*)addr, (socklen_t)resolved_addr.len,
-                &result);
+    tcp_connect((struct sockaddr*)addr, (socklen_t)resolved_addr.len, &result);
     GPR_ASSERT(result.port_index == 0);
     GPR_ASSERT(result.server == s);
     if (weak_ref.server == NULL) {
       server_weak_ref_set(&weak_ref, result.server);
     }
-    grpc_tcp_server_unref(&exec_ctx, result.server);
+    grpc_tcp_server_unref(result.server);
 
     on_connect_result_init(&result);
-    tcp_connect(&exec_ctx, (struct sockaddr*)addr1,
-                (socklen_t)resolved_addr1.len, &result);
+    tcp_connect((struct sockaddr*)addr1, (socklen_t)resolved_addr1.len,
+                &result);
     GPR_ASSERT(result.port_index == 1);
     GPR_ASSERT(result.server == s);
-    grpc_tcp_server_unref(&exec_ctx, result.server);
+    grpc_tcp_server_unref(result.server);
   }
 
   /* Weak ref to server valid until final unref. */
   GPR_ASSERT(weak_ref.server != NULL);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
 
   /* Weak ref lost. */
   GPR_ASSERT(weak_ref.server == NULL);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_test_init(argc, argv);
   grpc_init();
   g_pollset = static_cast<grpc_pollset*>(gpr_malloc(grpc_pollset_size()));
@@ -313,8 +299,8 @@ int main(int argc, char** argv) {
 
   GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_pollset_shutdown(g_pollset, &destroyed);
+
   grpc_shutdown();
   gpr_free(g_pollset);
   return 0;
diff --git a/test/core/iomgr/timer_list_test.cc b/test/core/iomgr/timer_list_test.cc
index d74ea4fc96..deb8c4d87e 100644
--- a/test/core/iomgr/timer_list_test.cc
+++ b/test/core/iomgr/timer_list_test.cc
@@ -25,6 +25,7 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/log.h>
 #include "src/core/lib/debug/trace.h"
 #include "test/core/util/test_config.h"
@@ -37,127 +38,125 @@ extern grpc_core::TraceFlag grpc_timer_check_trace;
 
 static int cb_called[MAX_CB][2];
 
-static void cb(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void cb(void* arg, grpc_error* error) {
   cb_called[(intptr_t)arg][error == GRPC_ERROR_NONE]++;
 }
 
 static void add_test(void) {
   int i;
   grpc_timer timers[20];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_INFO, "add_test");
 
-  grpc_timer_list_init(&exec_ctx);
+  grpc_timer_list_init();
   grpc_core::testing::grpc_tracer_enable_flag(&grpc_timer_trace);
   grpc_core::testing::grpc_tracer_enable_flag(&grpc_timer_check_trace);
   memset(cb_called, 0, sizeof(cb_called));
 
-  grpc_millis start = grpc_exec_ctx_now(&exec_ctx);
+  grpc_millis start = grpc_core::ExecCtx::Get()->Now();
 
   /* 10 ms timers.  will expire in the current epoch */
   for (i = 0; i < 10; i++) {
     grpc_timer_init(
-        &exec_ctx, &timers[i], start + 10,
+        &timers[i], start + 10,
         GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)i, grpc_schedule_on_exec_ctx));
   }
 
   /* 1010 ms timers.  will expire in the next epoch */
   for (i = 10; i < 20; i++) {
     grpc_timer_init(
-        &exec_ctx, &timers[i], start + 1010,
+        &timers[i], start + 1010,
         GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)i, grpc_schedule_on_exec_ctx));
   }
 
   /* collect timers.  Only the first batch should be ready. */
-  exec_ctx.now = start + 500;
-  GPR_ASSERT(grpc_timer_check(&exec_ctx, nullptr) == GRPC_TIMERS_FIRED);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(start + 500);
+  GPR_ASSERT(grpc_timer_check(nullptr) == GRPC_TIMERS_FIRED);
+  grpc_core::ExecCtx::Get()->Flush();
   for (i = 0; i < 20; i++) {
     GPR_ASSERT(cb_called[i][1] == (i < 10));
     GPR_ASSERT(cb_called[i][0] == 0);
   }
 
-  exec_ctx.now = start + 600;
-  GPR_ASSERT(grpc_timer_check(&exec_ctx, nullptr) ==
-             GRPC_TIMERS_CHECKED_AND_EMPTY);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(start + 600);
+  GPR_ASSERT(grpc_timer_check(nullptr) == GRPC_TIMERS_CHECKED_AND_EMPTY);
+  grpc_core::ExecCtx::Get()->Flush();
   for (i = 0; i < 30; i++) {
     GPR_ASSERT(cb_called[i][1] == (i < 10));
     GPR_ASSERT(cb_called[i][0] == 0);
   }
 
   /* collect the rest of the timers */
-  exec_ctx.now = start + 1500;
-  GPR_ASSERT(grpc_timer_check(&exec_ctx, nullptr) == GRPC_TIMERS_FIRED);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(start + 1500);
+  GPR_ASSERT(grpc_timer_check(nullptr) == GRPC_TIMERS_FIRED);
+  grpc_core::ExecCtx::Get()->Flush();
   for (i = 0; i < 30; i++) {
     GPR_ASSERT(cb_called[i][1] == (i < 20));
     GPR_ASSERT(cb_called[i][0] == 0);
   }
 
-  exec_ctx.now = start + 1600;
-  GPR_ASSERT(grpc_timer_check(&exec_ctx, nullptr) ==
-             GRPC_TIMERS_CHECKED_AND_EMPTY);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(start + 1600);
+  GPR_ASSERT(grpc_timer_check(nullptr) == GRPC_TIMERS_CHECKED_AND_EMPTY);
   for (i = 0; i < 30; i++) {
     GPR_ASSERT(cb_called[i][1] == (i < 20));
     GPR_ASSERT(cb_called[i][0] == 0);
   }
 
-  grpc_timer_list_shutdown(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_timer_list_shutdown();
 }
 
 /* Cleaning up a list with pending timers. */
 void destruction_test(void) {
   grpc_timer timers[5];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_INFO, "destruction_test");
 
-  exec_ctx.now_is_valid = true;
-  exec_ctx.now = 0;
-  grpc_timer_list_init(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(0);
+  grpc_timer_list_init();
   grpc_core::testing::grpc_tracer_enable_flag(&grpc_timer_trace);
   grpc_core::testing::grpc_tracer_enable_flag(&grpc_timer_check_trace);
   memset(cb_called, 0, sizeof(cb_called));
 
   grpc_timer_init(
-      &exec_ctx, &timers[0], 100,
+      &timers[0], 100,
       GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)0, grpc_schedule_on_exec_ctx));
   grpc_timer_init(
-      &exec_ctx, &timers[1], 3,
+      &timers[1], 3,
       GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)1, grpc_schedule_on_exec_ctx));
   grpc_timer_init(
-      &exec_ctx, &timers[2], 100,
+      &timers[2], 100,
       GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)2, grpc_schedule_on_exec_ctx));
   grpc_timer_init(
-      &exec_ctx, &timers[3], 3,
+      &timers[3], 3,
       GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)3, grpc_schedule_on_exec_ctx));
   grpc_timer_init(
-      &exec_ctx, &timers[4], 1,
+      &timers[4], 1,
       GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)4, grpc_schedule_on_exec_ctx));
-  exec_ctx.now = 2;
-  GPR_ASSERT(grpc_timer_check(&exec_ctx, nullptr) == GRPC_TIMERS_FIRED);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(2);
+  GPR_ASSERT(grpc_timer_check(nullptr) == GRPC_TIMERS_FIRED);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(1 == cb_called[4][1]);
-  grpc_timer_cancel(&exec_ctx, &timers[0]);
-  grpc_timer_cancel(&exec_ctx, &timers[3]);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_timer_cancel(&timers[0]);
+  grpc_timer_cancel(&timers[3]);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(1 == cb_called[0][0]);
   GPR_ASSERT(1 == cb_called[3][0]);
 
-  grpc_timer_list_shutdown(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_timer_list_shutdown();
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(1 == cb_called[1][0]);
   GPR_ASSERT(1 == cb_called[2][0]);
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_core::ExecCtx::GlobalInit();
   gpr_set_log_verbosity(GPR_LOG_SEVERITY_DEBUG);
   add_test();
   destruction_test();
+  grpc_core::ExecCtx::GlobalShutdown();
   return 0;
 }
 
diff --git a/test/core/iomgr/udp_server_test.cc b/test/core/iomgr/udp_server_test.cc
index 6e17be9cd6..0deb534abd 100644
--- a/test/core/iomgr/udp_server_test.cc
+++ b/test/core/iomgr/udp_server_test.cc
@@ -50,7 +50,7 @@ static int g_number_of_writes = 0;
 static int g_number_of_bytes_read = 0;
 static int g_number_of_orphan_calls = 0;
 
-static bool on_read(grpc_exec_ctx* exec_ctx, grpc_fd* emfd, void* user_data) {
+static bool on_read(grpc_fd* emfd, void* user_data) {
   char read_buffer[512];
   ssize_t byte_count;
 
@@ -61,27 +61,27 @@ static bool on_read(grpc_exec_ctx* exec_ctx, grpc_fd* emfd, void* user_data) {
   g_number_of_reads++;
   g_number_of_bytes_read += (int)byte_count;
 
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
   return false;
 }
 
-static void on_write(grpc_exec_ctx* exec_ctx, grpc_fd* emfd, void* user_data,
+static void on_write(grpc_fd* emfd, void* user_data,
                      grpc_closure* notify_on_write_closure) {
   gpr_mu_lock(g_mu);
   g_number_of_writes++;
 
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
-static void on_fd_orphaned(grpc_exec_ctx* exec_ctx, grpc_fd* emfd,
-                           grpc_closure* closure, void* user_data) {
+static void on_fd_orphaned(grpc_fd* emfd, grpc_closure* closure,
+                           void* user_data) {
   gpr_log(GPR_INFO, "gRPC FD about to be orphaned: %d",
           grpc_fd_wrapped_fd(emfd));
-  GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
   g_number_of_orphan_calls++;
 }
 
@@ -130,24 +130,22 @@ static test_socket_factory* test_socket_factory_create(void) {
 }
 
 static void test_no_op(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_udp_server* s = grpc_udp_server_create(nullptr);
-  grpc_udp_server_destroy(&exec_ctx, s, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_udp_server_destroy(s, nullptr);
 }
 
 static void test_no_op_with_start(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_udp_server* s = grpc_udp_server_create(nullptr);
   LOG_TEST("test_no_op_with_start");
-  grpc_udp_server_start(&exec_ctx, s, nullptr, 0, nullptr);
-  grpc_udp_server_destroy(&exec_ctx, s, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_udp_server_start(s, nullptr, 0, nullptr);
+  grpc_udp_server_destroy(s, nullptr);
 }
 
 static void test_no_op_with_port(void) {
   g_number_of_orphan_calls = 0;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   grpc_udp_server* s = grpc_udp_server_create(nullptr);
@@ -159,8 +157,7 @@ static void test_no_op_with_port(void) {
   GPR_ASSERT(grpc_udp_server_add_port(s, &resolved_addr, on_read, on_write,
                                       on_fd_orphaned));
 
-  grpc_udp_server_destroy(&exec_ctx, s, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_udp_server_destroy(s, nullptr);
 
   /* The server had a single FD, which should have been orphaned. */
   GPR_ASSERT(g_number_of_orphan_calls == 1);
@@ -168,7 +165,7 @@ static void test_no_op_with_port(void) {
 
 static void test_no_op_with_port_and_socket_factory(void) {
   g_number_of_orphan_calls = 0;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
 
@@ -178,7 +175,7 @@ static void test_no_op_with_port_and_socket_factory(void) {
   grpc_channel_args* channel_args =
       grpc_channel_args_copy_and_add(nullptr, &socket_factory_arg, 1);
   grpc_udp_server* s = grpc_udp_server_create(channel_args);
-  grpc_channel_args_destroy(&exec_ctx, channel_args);
+  grpc_channel_args_destroy(channel_args);
 
   LOG_TEST("test_no_op_with_port_and_socket_factory");
 
@@ -190,8 +187,8 @@ static void test_no_op_with_port_and_socket_factory(void) {
   GPR_ASSERT(socket_factory->number_of_socket_calls == 1);
   GPR_ASSERT(socket_factory->number_of_bind_calls == 1);
 
-  grpc_udp_server_destroy(&exec_ctx, s, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_udp_server_destroy(s, nullptr);
+
   grpc_socket_factory_unref(&socket_factory->base);
 
   /* The server had a single FD, which should have been orphaned. */
@@ -200,7 +197,7 @@ static void test_no_op_with_port_and_socket_factory(void) {
 
 static void test_no_op_with_port_and_start(void) {
   g_number_of_orphan_calls = 0;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   grpc_udp_server* s = grpc_udp_server_create(nullptr);
@@ -212,10 +209,9 @@ static void test_no_op_with_port_and_start(void) {
   GPR_ASSERT(grpc_udp_server_add_port(s, &resolved_addr, on_read, on_write,
                                       on_fd_orphaned));
 
-  grpc_udp_server_start(&exec_ctx, s, nullptr, 0, nullptr);
+  grpc_udp_server_start(s, nullptr, 0, nullptr);
 
-  grpc_udp_server_destroy(&exec_ctx, s, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_udp_server_destroy(s, nullptr);
 
   /* The server had a single FD, which is orphaned exactly once in *
    * grpc_udp_server_destroy. */
@@ -223,7 +219,7 @@ static void test_no_op_with_port_and_start(void) {
 }
 
 static void test_receive(int number_of_clients) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_storage* addr = (struct sockaddr_storage*)resolved_addr.addr;
   int clifd, svrfd;
@@ -250,7 +246,7 @@ static void test_receive(int number_of_clients) {
   GPR_ASSERT(resolved_addr.len <= sizeof(struct sockaddr_storage));
 
   pollsets[0] = g_pollset;
-  grpc_udp_server_start(&exec_ctx, s, pollsets, 1, nullptr);
+  grpc_udp_server_start(s, pollsets, 1, nullptr);
 
   gpr_mu_lock(g_mu);
 
@@ -266,13 +262,12 @@ static void test_receive(int number_of_clients) {
                        (socklen_t)resolved_addr.len) == 0);
     GPR_ASSERT(5 == write(clifd, "hello", 5));
     while (g_number_of_bytes_read < (number_of_bytes_read_before + 5) &&
-           deadline > grpc_exec_ctx_now(&exec_ctx)) {
+           deadline > grpc_core::ExecCtx::Get()->Now()) {
       grpc_pollset_worker* worker = nullptr;
       GPR_ASSERT(GRPC_LOG_IF_ERROR(
-          "pollset_work",
-          grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+          "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
       gpr_mu_unlock(g_mu);
-      grpc_exec_ctx_flush(&exec_ctx);
+      grpc_core::ExecCtx::Get()->Flush();
       gpr_mu_lock(g_mu);
     }
     close(clifd);
@@ -281,40 +276,40 @@ static void test_receive(int number_of_clients) {
 
   gpr_mu_unlock(g_mu);
 
-  grpc_udp_server_destroy(&exec_ctx, s, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_udp_server_destroy(s, nullptr);
 
   /* The server had a single FD, which is orphaned exactly once in *
    * grpc_udp_server_destroy. */
   GPR_ASSERT(g_number_of_orphan_calls == 1);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
-  grpc_pollset_init(g_pollset, &g_mu);
-
-  test_no_op();
-  test_no_op_with_start();
-  test_no_op_with_port();
-  test_no_op_with_port_and_socket_factory();
-  test_no_op_with_port_and_start();
-  test_receive(1);
-  test_receive(10);
-
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
-  gpr_free(g_pollset);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
+    grpc_pollset_init(g_pollset, &g_mu);
+
+    test_no_op();
+    test_no_op_with_start();
+    test_no_op_with_port();
+    test_no_op_with_port_and_socket_factory();
+    test_no_op_with_port_and_start();
+    test_receive(1);
+    test_receive(10);
+
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
+    grpc_core::ExecCtx::Get()->Flush();
+    gpr_free(g_pollset);
+  }
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/wakeup_fd_cv_test.cc b/test/core/iomgr/wakeup_fd_cv_test.cc
index dc1d77a0ab..d4e05bd7ef 100644
--- a/test/core/iomgr/wakeup_fd_cv_test.cc
+++ b/test/core/iomgr/wakeup_fd_cv_test.cc
@@ -138,7 +138,7 @@ void test_poll_cv_trigger(void) {
 
   opt = gpr_thd_options_default();
   gpr_thd_options_set_joinable(&opt);
-  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  gpr_thd_new(&t_id, "grpc_background_poll", &background_poll, &pargs, &opt);
 
   // Wakeup wakeup_fd not listening for events
   GPR_ASSERT(grpc_wakeup_fd_wakeup(&cvfd1) == GRPC_ERROR_NONE);
@@ -154,7 +154,7 @@ void test_poll_cv_trigger(void) {
   // Pollin on socket fd
   pargs.timeout = -1;
   pargs.result = -2;
-  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  gpr_thd_new(&t_id, "grpc_background_poll", &background_poll, &pargs, &opt);
   trigger_socket_event();
   gpr_thd_join(t_id);
   GPR_ASSERT(pargs.result == 1);
@@ -168,7 +168,7 @@ void test_poll_cv_trigger(void) {
   // Pollin on wakeup fd
   reset_socket_event();
   pargs.result = -2;
-  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  gpr_thd_new(&t_id, "grpc_background_poll", &background_poll, &pargs, &opt);
   GPR_ASSERT(grpc_wakeup_fd_wakeup(&cvfd2) == GRPC_ERROR_NONE);
   gpr_thd_join(t_id);
 
@@ -182,7 +182,7 @@ void test_poll_cv_trigger(void) {
 
   // Pollin on wakeupfd before poll()
   pargs.result = -2;
-  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  gpr_thd_new(&t_id, "grpc_background_poll", &background_poll, &pargs, &opt);
   gpr_thd_join(t_id);
 
   GPR_ASSERT(pargs.result == 1);
@@ -199,7 +199,7 @@ void test_poll_cv_trigger(void) {
   reset_socket_event();
   GPR_ASSERT(grpc_wakeup_fd_consume_wakeup(&cvfd1) == GRPC_ERROR_NONE);
   GPR_ASSERT(grpc_wakeup_fd_consume_wakeup(&cvfd2) == GRPC_ERROR_NONE);
-  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  gpr_thd_new(&t_id, "grpc_background_poll", &background_poll, &pargs, &opt);
   gpr_thd_join(t_id);
 
   GPR_ASSERT(pargs.result == 0);
diff --git a/test/core/nanopb/fuzzer_response.cc b/test/core/nanopb/fuzzer_response.cc
index 7039c801cb..3a70dea5e9 100644
--- a/test/core/nanopb/fuzzer_response.cc
+++ b/test/core/nanopb/fuzzer_response.cc
@@ -19,6 +19,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h"
@@ -29,6 +30,7 @@ bool leak_check = true;
 static void dont_log(gpr_log_func_args* args) {}
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  grpc_init();
   if (squelch) gpr_set_log_function(dont_log);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
   grpc_grpclb_initial_response* response;
@@ -36,5 +38,6 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     grpc_grpclb_initial_response_destroy(response);
   }
   grpc_slice_unref(slice);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/nanopb/fuzzer_serverlist.cc b/test/core/nanopb/fuzzer_serverlist.cc
index 0a6b1767a1..d0af117ef9 100644
--- a/test/core/nanopb/fuzzer_serverlist.cc
+++ b/test/core/nanopb/fuzzer_serverlist.cc
@@ -19,6 +19,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h"
@@ -29,6 +30,7 @@ bool leak_check = true;
 static void dont_log(gpr_log_func_args* args) {}
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  grpc_init();
   if (squelch) gpr_set_log_function(dont_log);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
   grpc_grpclb_serverlist* serverlist;
@@ -36,5 +38,6 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     grpc_grpclb_destroy_serverlist(serverlist);
   }
   grpc_slice_unref(slice);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/network_benchmarks/low_level_ping_pong.cc b/test/core/network_benchmarks/low_level_ping_pong.cc
index 2ae9a45d7c..96b0745f52 100644
--- a/test/core/network_benchmarks/low_level_ping_pong.cc
+++ b/test/core/network_benchmarks/low_level_ping_pong.cc
@@ -583,7 +583,7 @@ static int run_benchmark(const char* socket_type, thread_args* client_args,
   gpr_log(GPR_INFO, "Starting test %s %s %zu", client_args->strategy_name,
           socket_type, client_args->msg_size);
 
-  gpr_thd_new(&tid, server_thread_wrap, server_args, nullptr);
+  gpr_thd_new(&tid, "server_thread", server_thread_wrap, server_args, nullptr);
   client_thread(client_args);
   return 0;
 }
diff --git a/test/core/security/credentials_test.cc b/test/core/security/credentials_test.cc
index 64d383ad0a..ecc61928f5 100644
--- a/test/core/security/credentials_test.cc
+++ b/test/core/security/credentials_test.cc
@@ -148,41 +148,37 @@ static grpc_httpcli_response http_response(int status, const char* body) {
 /* -- Tests. -- */
 
 static void test_empty_md_array(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_credentials_mdelem_array md_array;
   memset(&md_array, 0, sizeof(md_array));
   GPR_ASSERT(md_array.md == nullptr);
   GPR_ASSERT(md_array.size == 0);
-  grpc_credentials_mdelem_array_destroy(&exec_ctx, &md_array);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_credentials_mdelem_array_destroy(&md_array);
 }
 
 static void test_add_to_empty_md_array(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_credentials_mdelem_array md_array;
   memset(&md_array, 0, sizeof(md_array));
   const char* key = "hello";
   const char* value = "there blah blah blah blah blah blah blah";
-  grpc_mdelem md =
-      grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_copied_string(key),
-                              grpc_slice_from_copied_string(value));
+  grpc_mdelem md = grpc_mdelem_from_slices(
+      grpc_slice_from_copied_string(key), grpc_slice_from_copied_string(value));
   grpc_credentials_mdelem_array_add(&md_array, md);
   GPR_ASSERT(md_array.size == 1);
   GPR_ASSERT(grpc_mdelem_eq(md, md_array.md[0]));
-  GRPC_MDELEM_UNREF(&exec_ctx, md);
-  grpc_credentials_mdelem_array_destroy(&exec_ctx, &md_array);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(md);
+  grpc_credentials_mdelem_array_destroy(&md_array);
 }
 
 static void test_add_abunch_to_md_array(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_credentials_mdelem_array md_array;
   memset(&md_array, 0, sizeof(md_array));
   const char* key = "hello";
   const char* value = "there blah blah blah blah blah blah blah";
-  grpc_mdelem md =
-      grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_copied_string(key),
-                              grpc_slice_from_copied_string(value));
+  grpc_mdelem md = grpc_mdelem_from_slices(
+      grpc_slice_from_copied_string(key), grpc_slice_from_copied_string(value));
   size_t num_entries = 1000;
   for (size_t i = 0; i < num_entries; ++i) {
     grpc_credentials_mdelem_array_add(&md_array, md);
@@ -190,57 +186,52 @@ static void test_add_abunch_to_md_array(void) {
   for (size_t i = 0; i < num_entries; ++i) {
     GPR_ASSERT(grpc_mdelem_eq(md_array.md[i], md));
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, md);
-  grpc_credentials_mdelem_array_destroy(&exec_ctx, &md_array);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(md);
+  grpc_credentials_mdelem_array_destroy(&md_array);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_ok(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response =
       http_response(200, valid_oauth2_json_response);
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
-             GRPC_CREDENTIALS_OK);
+                 &response, &token_md, &token_lifetime) == GRPC_CREDENTIALS_OK);
   GPR_ASSERT(token_lifetime == 3599 * GPR_MS_PER_SEC);
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDKEY(token_md), "authorization") == 0);
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDVALUE(token_md),
                                 "Bearer ya29.AHES6ZRN3-HlhAPya30GnW_bHSb_") ==
              0);
-  GRPC_MDELEM_UNREF(&exec_ctx, token_md);
+  GRPC_MDELEM_UNREF(token_md);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_bad_http_status(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response =
       http_response(401, valid_oauth2_json_response);
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
+                 &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_empty_http_body(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response = http_response(200, "");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
+                 &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_invalid_json(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response =
@@ -249,14 +240,13 @@ static void test_oauth2_token_fetcher_creds_parsing_invalid_json(void) {
                     " \"expires_in\":3599, "
                     " \"token_type\":\"Bearer\"");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
+                 &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_missing_token(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response = http_response(200,
@@ -264,14 +254,13 @@ static void test_oauth2_token_fetcher_creds_parsing_missing_token(void) {
                                                  " \"expires_in\":3599, "
                                                  " \"token_type\":\"Bearer\"}");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
+                 &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_missing_token_type(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response =
@@ -280,15 +269,14 @@ static void test_oauth2_token_fetcher_creds_parsing_missing_token_type(void) {
                     " \"expires_in\":3599, "
                     "}");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
+                 &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_missing_token_lifetime(
     void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response =
@@ -296,10 +284,9 @@ static void test_oauth2_token_fetcher_creds_parsing_missing_token_lifetime(
                     "{\"access_token\":\"ya29.AHES6ZRN3-HlhAPya30GnW_bHSb_\","
                     " \"token_type\":\"Bearer\"}");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
+                 &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 typedef struct {
@@ -336,8 +323,7 @@ static void check_metadata(const expected_md* expected,
   }
 }
 
-static void check_request_metadata(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void check_request_metadata(void* arg, grpc_error* error) {
   request_metadata_state* state = (request_metadata_state*)arg;
   gpr_log(GPR_INFO, "expected_error: %s",
           grpc_error_string(state->expected_error));
@@ -358,9 +344,8 @@ static void check_request_metadata(grpc_exec_ctx* exec_ctx, void* arg,
           state->expected_size, state->md_array.size);
   GPR_ASSERT(state->md_array.size == state->expected_size);
   check_metadata(state->expected, &state->md_array);
-  grpc_credentials_mdelem_array_destroy(exec_ctx, &state->md_array);
-  grpc_pollset_set_destroy(exec_ctx,
-                           grpc_polling_entity_pollset_set(&state->pollent));
+  grpc_credentials_mdelem_array_destroy(&state->md_array);
+  grpc_pollset_set_destroy(grpc_polling_entity_pollset_set(&state->pollent));
   gpr_free(state);
 }
 
@@ -379,22 +364,21 @@ static request_metadata_state* make_request_metadata_state(
   return state;
 }
 
-static void run_request_metadata_test(grpc_exec_ctx* exec_ctx,
-                                      grpc_call_credentials* creds,
+static void run_request_metadata_test(grpc_call_credentials* creds,
                                       grpc_auth_metadata_context auth_md_ctx,
                                       request_metadata_state* state) {
   grpc_error* error = GRPC_ERROR_NONE;
   if (grpc_call_credentials_get_request_metadata(
-          exec_ctx, creds, &state->pollent, auth_md_ctx, &state->md_array,
+          creds, &state->pollent, auth_md_ctx, &state->md_array,
           &state->on_request_metadata, &error)) {
     // Synchronous result.  Invoke the callback directly.
-    check_request_metadata(exec_ctx, state, error);
+    check_request_metadata(state, error);
     GRPC_ERROR_UNREF(error);
   }
 }
 
 static void test_google_iam_creds(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   expected_md emd[] = {{GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY,
                         test_google_iam_authorization_token},
                        {GRPC_IAM_AUTHORITY_SELECTOR_METADATA_KEY,
@@ -406,13 +390,12 @@ static void test_google_iam_creds(void) {
       nullptr);
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_call_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_call_credentials_unref(creds);
 }
 
 static void test_access_token_creds(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   expected_md emd[] = {{GRPC_AUTHORIZATION_METADATA_KEY, "Bearer blah"}};
   request_metadata_state* state =
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
@@ -421,16 +404,14 @@ static void test_access_token_creds(void) {
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
   GPR_ASSERT(strcmp(creds->type, GRPC_CALL_CREDENTIALS_TYPE_OAUTH2) == 0);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_call_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_call_credentials_unref(creds);
 }
 
 static grpc_security_status check_channel_oauth2_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* c,
-    grpc_call_credentials* call_creds, const char* target,
-    const grpc_channel_args* args, grpc_channel_security_connector** sc,
-    grpc_channel_args** new_args) {
+    grpc_channel_credentials* c, grpc_call_credentials* call_creds,
+    const char* target, const grpc_channel_args* args,
+    grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
   GPR_ASSERT(strcmp(c->type, "mock") == 0);
   GPR_ASSERT(call_creds != nullptr);
   GPR_ASSERT(strcmp(call_creds->type, GRPC_CALL_CREDENTIALS_TYPE_OAUTH2) == 0);
@@ -438,7 +419,7 @@ static grpc_security_status check_channel_oauth2_create_security_connector(
 }
 
 static void test_channel_oauth2_composite_creds(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_args* new_args;
   grpc_channel_credentials_vtable vtable = {
       nullptr, check_channel_oauth2_create_security_connector, nullptr};
@@ -452,14 +433,13 @@ static void test_channel_oauth2_composite_creds(void) {
   grpc_channel_credentials_release(channel_creds);
   grpc_call_credentials_release(oauth2_creds);
   GPR_ASSERT(grpc_channel_credentials_create_security_connector(
-                 &exec_ctx, channel_oauth2_creds, nullptr, nullptr, nullptr,
-                 &new_args) == GRPC_SECURITY_OK);
+                 channel_oauth2_creds, nullptr, nullptr, nullptr, &new_args) ==
+             GRPC_SECURITY_OK);
   grpc_channel_credentials_release(channel_oauth2_creds);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_google_iam_composite_creds(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   expected_md emd[] = {
       {GRPC_AUTHORIZATION_METADATA_KEY, test_oauth2_bearer_token},
       {GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY,
@@ -471,15 +451,15 @@ static void test_oauth2_google_iam_composite_creds(void) {
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
   grpc_call_credentials* oauth2_creds = grpc_md_only_test_credentials_create(
-      &exec_ctx, "authorization", test_oauth2_bearer_token, 0);
+      "authorization", test_oauth2_bearer_token, 0);
   grpc_call_credentials* google_iam_creds = grpc_google_iam_credentials_create(
       test_google_iam_authorization_token, test_google_iam_authority_selector,
       nullptr);
   grpc_call_credentials* composite_creds =
       grpc_composite_call_credentials_create(oauth2_creds, google_iam_creds,
                                              nullptr);
-  grpc_call_credentials_unref(&exec_ctx, oauth2_creds);
-  grpc_call_credentials_unref(&exec_ctx, google_iam_creds);
+  grpc_call_credentials_unref(oauth2_creds);
+  grpc_call_credentials_unref(google_iam_creds);
   GPR_ASSERT(
       strcmp(composite_creds->type, GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE) == 0);
   const grpc_call_credentials_array* creds_array =
@@ -489,17 +469,15 @@ static void test_oauth2_google_iam_composite_creds(void) {
                     GRPC_CALL_CREDENTIALS_TYPE_OAUTH2) == 0);
   GPR_ASSERT(strcmp(creds_array->creds_array[1]->type,
                     GRPC_CALL_CREDENTIALS_TYPE_IAM) == 0);
-  run_request_metadata_test(&exec_ctx, composite_creds, auth_md_ctx, state);
-  grpc_call_credentials_unref(&exec_ctx, composite_creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  run_request_metadata_test(composite_creds, auth_md_ctx, state);
+  grpc_call_credentials_unref(composite_creds);
 }
 
 static grpc_security_status
 check_channel_oauth2_google_iam_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* c,
-    grpc_call_credentials* call_creds, const char* target,
-    const grpc_channel_args* args, grpc_channel_security_connector** sc,
-    grpc_channel_args** new_args) {
+    grpc_channel_credentials* c, grpc_call_credentials* call_creds,
+    const char* target, const grpc_channel_args* args,
+    grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
   const grpc_call_credentials_array* creds_array;
   GPR_ASSERT(strcmp(c->type, "mock") == 0);
   GPR_ASSERT(call_creds != nullptr);
@@ -514,7 +492,7 @@ check_channel_oauth2_google_iam_create_security_connector(
 }
 
 static void test_channel_oauth2_google_iam_composite_creds(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_args* new_args;
   grpc_channel_credentials_vtable vtable = {
       nullptr, check_channel_oauth2_google_iam_create_security_connector,
@@ -538,11 +516,10 @@ static void test_channel_oauth2_google_iam_composite_creds(void) {
   grpc_call_credentials_release(google_iam_creds);
 
   GPR_ASSERT(grpc_channel_credentials_create_security_connector(
-                 &exec_ctx, channel_oauth2_iam_creds, nullptr, nullptr, nullptr,
+                 channel_oauth2_iam_creds, nullptr, nullptr, nullptr,
                  &new_args) == GRPC_SECURITY_OK);
 
   grpc_channel_credentials_release(channel_oauth2_iam_creds);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void validate_compute_engine_http_request(
@@ -559,35 +536,32 @@ static void validate_compute_engine_http_request(
 }
 
 static int compute_engine_httpcli_get_success_override(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    grpc_millis deadline, grpc_closure* on_done,
-    grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, grpc_millis deadline,
+    grpc_closure* on_done, grpc_httpcli_response* response) {
   validate_compute_engine_http_request(request);
   *response = http_response(200, valid_oauth2_json_response);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static int compute_engine_httpcli_get_failure_override(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    grpc_millis deadline, grpc_closure* on_done,
-    grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, grpc_millis deadline,
+    grpc_closure* on_done, grpc_httpcli_response* response) {
   validate_compute_engine_http_request(request);
   *response = http_response(403, "Not Authorized.");
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static int httpcli_post_should_not_be_called(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    const char* body_bytes, size_t body_size, grpc_millis deadline,
-    grpc_closure* on_done, grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, const char* body_bytes,
+    size_t body_size, grpc_millis deadline, grpc_closure* on_done,
+    grpc_httpcli_response* response) {
   GPR_ASSERT("HTTP POST should not be called" == nullptr);
   return 1;
 }
 
-static int httpcli_get_should_not_be_called(grpc_exec_ctx* exec_ctx,
-                                            const grpc_httpcli_request* request,
+static int httpcli_get_should_not_be_called(const grpc_httpcli_request* request,
                                             grpc_millis deadline,
                                             grpc_closure* on_done,
                                             grpc_httpcli_response* response) {
@@ -596,7 +570,7 @@ static int httpcli_get_should_not_be_called(grpc_exec_ctx* exec_ctx,
 }
 
 static void test_compute_engine_creds_success(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   expected_md emd[] = {
       {"authorization", "Bearer ya29.AHES6ZRN3-HlhAPya30GnW_bHSb_"}};
   grpc_call_credentials* creds =
@@ -609,24 +583,23 @@ static void test_compute_engine_creds_success(void) {
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   grpc_httpcli_set_override(compute_engine_httpcli_get_success_override,
                             httpcli_post_should_not_be_called);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Second request: the cached token should be served directly. */
   state =
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   grpc_httpcli_set_override(httpcli_get_should_not_be_called,
                             httpcli_post_should_not_be_called);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  grpc_call_credentials_unref(&exec_ctx, creds);
+  grpc_call_credentials_unref(creds);
   grpc_httpcli_set_override(nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_compute_engine_creds_failure(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   request_metadata_state* state = make_request_metadata_state(
       GRPC_ERROR_CREATE_FROM_STATIC_STRING(
           "Error occured when fetching oauth2 token."),
@@ -637,10 +610,9 @@ static void test_compute_engine_creds_failure(void) {
       grpc_google_compute_engine_credentials_create(nullptr);
   grpc_httpcli_set_override(compute_engine_httpcli_get_failure_override,
                             httpcli_post_should_not_be_called);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_call_credentials_unref(&exec_ctx, creds);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_call_credentials_unref(creds);
   grpc_httpcli_set_override(nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void validate_refresh_token_http_request(
@@ -667,27 +639,27 @@ static void validate_refresh_token_http_request(
 }
 
 static int refresh_token_httpcli_post_success(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    const char* body, size_t body_size, grpc_millis deadline,
-    grpc_closure* on_done, grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, const char* body, size_t body_size,
+    grpc_millis deadline, grpc_closure* on_done,
+    grpc_httpcli_response* response) {
   validate_refresh_token_http_request(request, body, body_size);
   *response = http_response(200, valid_oauth2_json_response);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static int refresh_token_httpcli_post_failure(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    const char* body, size_t body_size, grpc_millis deadline,
-    grpc_closure* on_done, grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, const char* body, size_t body_size,
+    grpc_millis deadline, grpc_closure* on_done,
+    grpc_httpcli_response* response) {
   validate_refresh_token_http_request(request, body, body_size);
   *response = http_response(403, "Not Authorized.");
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static void test_refresh_token_creds_success(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   expected_md emd[] = {
       {"authorization", "Bearer ya29.AHES6ZRN3-HlhAPya30GnW_bHSb_"}};
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
@@ -700,24 +672,23 @@ static void test_refresh_token_creds_success(void) {
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   grpc_httpcli_set_override(httpcli_get_should_not_be_called,
                             refresh_token_httpcli_post_success);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Second request: the cached token should be served directly. */
   state =
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   grpc_httpcli_set_override(httpcli_get_should_not_be_called,
                             httpcli_post_should_not_be_called);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  grpc_call_credentials_unref(&exec_ctx, creds);
+  grpc_call_credentials_unref(creds);
   grpc_httpcli_set_override(nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_refresh_token_creds_failure(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   request_metadata_state* state = make_request_metadata_state(
       GRPC_ERROR_CREATE_FROM_STATIC_STRING(
           "Error occured when fetching oauth2 token."),
@@ -728,10 +699,9 @@ static void test_refresh_token_creds_failure(void) {
       test_refresh_token_str, nullptr);
   grpc_httpcli_set_override(httpcli_get_should_not_be_called,
                             refresh_token_httpcli_post_failure);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_call_credentials_unref(&exec_ctx, creds);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_call_credentials_unref(creds);
   grpc_httpcli_set_override(nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void validate_jwt_encode_and_sign_params(
@@ -821,7 +791,7 @@ static void test_jwt_creds_lifetime(void) {
 
 static void test_jwt_creds_success(void) {
   char* json_key_string = test_json_key_str();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
   char* expected_md_value;
@@ -835,16 +805,16 @@ static void test_jwt_creds_success(void) {
   request_metadata_state* state =
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   grpc_jwt_encode_and_sign_set_override(encode_and_sign_jwt_success);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Second request: the cached token should be served directly. */
   state =
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   grpc_jwt_encode_and_sign_set_override(
       encode_and_sign_jwt_should_not_be_called);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Third request: Different service url so jwt_encode_and_sign should be
      called again (no caching). */
@@ -852,19 +822,18 @@ static void test_jwt_creds_success(void) {
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   auth_md_ctx.service_url = other_test_service_url;
   grpc_jwt_encode_and_sign_set_override(encode_and_sign_jwt_success);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  grpc_call_credentials_unref(&exec_ctx, creds);
+  grpc_call_credentials_unref(creds);
   gpr_free(json_key_string);
   gpr_free(expected_md_value);
   grpc_jwt_encode_and_sign_set_override(nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_jwt_creds_signing_failure(void) {
   char* json_key_string = test_json_key_str();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
   request_metadata_state* state = make_request_metadata_state(
@@ -875,12 +844,11 @@ static void test_jwt_creds_signing_failure(void) {
           json_key_string, grpc_max_auth_token_lifetime(), nullptr);
 
   grpc_jwt_encode_and_sign_set_override(encode_and_sign_jwt_failure);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
+  run_request_metadata_test(creds, auth_md_ctx, state);
 
   gpr_free(json_key_string);
-  grpc_call_credentials_unref(&exec_ctx, creds);
+  grpc_call_credentials_unref(creds);
   grpc_jwt_encode_and_sign_set_override(nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void set_google_default_creds_env_var_with_file_contents(
@@ -897,7 +865,7 @@ static void set_google_default_creds_env_var_with_file_contents(
 }
 
 static void test_google_default_creds_auth_key(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_service_account_jwt_access_credentials* jwt;
   grpc_composite_channel_credentials* creds;
   char* json_key = test_json_key_str();
@@ -913,13 +881,12 @@ static void test_google_default_creds_auth_key(void) {
       strcmp(jwt->key.client_id,
              "777-abaslkan11hlb6nmim3bpspl31ud.apps.googleusercontent.com") ==
       0);
-  grpc_channel_credentials_unref(&exec_ctx, &creds->base);
+  grpc_channel_credentials_unref(&creds->base);
   gpr_setenv(GRPC_GOOGLE_CREDENTIALS_ENV_VAR, ""); /* Reset. */
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_google_default_creds_refresh_token(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_google_refresh_token_credentials* refresh;
   grpc_composite_channel_credentials* creds;
   grpc_flush_cached_google_default_credentials();
@@ -931,15 +898,13 @@ static void test_google_default_creds_refresh_token(void) {
   refresh = (grpc_google_refresh_token_credentials*)creds->call_creds;
   GPR_ASSERT(strcmp(refresh->refresh_token.client_id,
                     "32555999999.apps.googleusercontent.com") == 0);
-  grpc_channel_credentials_unref(&exec_ctx, &creds->base);
+  grpc_channel_credentials_unref(&creds->base);
   gpr_setenv(GRPC_GOOGLE_CREDENTIALS_ENV_VAR, ""); /* Reset. */
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static int default_creds_gce_detection_httpcli_get_success_override(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    grpc_millis deadline, grpc_closure* on_done,
-    grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, grpc_millis deadline,
+    grpc_closure* on_done, grpc_httpcli_response* response) {
   *response = http_response(200, "");
   grpc_http_header* headers =
       static_cast<grpc_http_header*>(gpr_malloc(sizeof(*headers) * 1));
@@ -949,14 +914,14 @@ static int default_creds_gce_detection_httpcli_get_success_override(
   response->hdrs = headers;
   GPR_ASSERT(strcmp(request->http.path, "/") == 0);
   GPR_ASSERT(strcmp(request->host, "metadata.google.internal") == 0);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static char* null_well_known_creds_path_getter(void) { return nullptr; }
 
 static void test_google_default_creds_gce(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   expected_md emd[] = {
       {"authorization", "Bearer ya29.AHES6ZRN3-HlhAPya30GnW_bHSb_"}};
   request_metadata_state* state =
@@ -981,8 +946,8 @@ static void test_google_default_creds_gce(void) {
   GPR_ASSERT(creds->call_creds != nullptr);
   grpc_httpcli_set_override(compute_engine_httpcli_get_success_override,
                             httpcli_post_should_not_be_called);
-  run_request_metadata_test(&exec_ctx, creds->call_creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds->call_creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Check that we get a cached creds if we call
      grpc_google_default_credentials_create again.
@@ -994,22 +959,20 @@ static void test_google_default_creds_gce(void) {
   GPR_ASSERT(cached_creds == &creds->base);
 
   /* Cleanup. */
-  grpc_channel_credentials_unref(&exec_ctx, cached_creds);
-  grpc_channel_credentials_unref(&exec_ctx, &creds->base);
+  grpc_channel_credentials_unref(cached_creds);
+  grpc_channel_credentials_unref(&creds->base);
   grpc_httpcli_set_override(nullptr, nullptr);
   grpc_override_well_known_credentials_path_getter(nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static int default_creds_gce_detection_httpcli_get_failure_override(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    grpc_millis deadline, grpc_closure* on_done,
-    grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, grpc_millis deadline,
+    grpc_closure* on_done, grpc_httpcli_response* response) {
   /* No magic header. */
   GPR_ASSERT(strcmp(request->http.path, "/") == 0);
   GPR_ASSERT(strcmp(request->host, "metadata.google.internal") == 0);
   *response = http_response(200, "");
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
@@ -1093,7 +1056,7 @@ static void plugin_destroy(void* state) {
 static void test_metadata_plugin_success(void) {
   plugin_state state = PLUGIN_INITIAL_STATE;
   grpc_metadata_credentials_plugin plugin;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
   request_metadata_state* md_state = make_request_metadata_state(
@@ -1106,17 +1069,17 @@ static void test_metadata_plugin_success(void) {
   grpc_call_credentials* creds =
       grpc_metadata_credentials_create_from_plugin(plugin, nullptr);
   GPR_ASSERT(state == PLUGIN_INITIAL_STATE);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, md_state);
+  run_request_metadata_test(creds, auth_md_ctx, md_state);
   GPR_ASSERT(state == PLUGIN_GET_METADATA_CALLED_STATE);
-  grpc_call_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_call_credentials_unref(creds);
+
   GPR_ASSERT(state == PLUGIN_DESTROY_CALLED_STATE);
 }
 
 static void test_metadata_plugin_failure(void) {
   plugin_state state = PLUGIN_INITIAL_STATE;
   grpc_metadata_credentials_plugin plugin;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
   char* expected_error;
@@ -1134,10 +1097,10 @@ static void test_metadata_plugin_failure(void) {
   grpc_call_credentials* creds =
       grpc_metadata_credentials_create_from_plugin(plugin, nullptr);
   GPR_ASSERT(state == PLUGIN_INITIAL_STATE);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, md_state);
+  run_request_metadata_test(creds, auth_md_ctx, md_state);
   GPR_ASSERT(state == PLUGIN_GET_METADATA_CALLED_STATE);
-  grpc_call_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_call_credentials_unref(creds);
+
   GPR_ASSERT(state == PLUGIN_DESTROY_CALLED_STATE);
 }
 
@@ -1158,7 +1121,7 @@ static void test_get_well_known_google_credentials_file_path(void) {
 }
 
 static void test_channel_creds_duplicate_without_call_creds(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   grpc_channel_credentials* channel_creds =
       grpc_fake_transport_security_credentials_create();
@@ -1167,23 +1130,21 @@ static void test_channel_creds_duplicate_without_call_creds(void) {
       grpc_channel_credentials_duplicate_without_call_credentials(
           channel_creds);
   GPR_ASSERT(dup == channel_creds);
-  grpc_channel_credentials_unref(&exec_ctx, dup);
+  grpc_channel_credentials_unref(dup);
 
   grpc_call_credentials* call_creds =
       grpc_access_token_credentials_create("blah", nullptr);
   grpc_channel_credentials* composite_creds =
       grpc_composite_channel_credentials_create(channel_creds, call_creds,
                                                 nullptr);
-  grpc_call_credentials_unref(&exec_ctx, call_creds);
+  grpc_call_credentials_unref(call_creds);
   dup = grpc_channel_credentials_duplicate_without_call_credentials(
       composite_creds);
   GPR_ASSERT(dup == channel_creds);
-  grpc_channel_credentials_unref(&exec_ctx, dup);
-
-  grpc_channel_credentials_unref(&exec_ctx, channel_creds);
-  grpc_channel_credentials_unref(&exec_ctx, composite_creds);
+  grpc_channel_credentials_unref(dup);
 
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_credentials_unref(channel_creds);
+  grpc_channel_credentials_unref(composite_creds);
 }
 
 typedef struct {
diff --git a/test/core/security/json_token_test.cc b/test/core/security/json_token_test.cc
index 0b6ccd5e37..aac9cc0029 100644
--- a/test/core/security/json_token_test.cc
+++ b/test/core/security/json_token_test.cc
@@ -207,7 +207,7 @@ static void test_parse_json_key_failure_no_private_key(void) {
 
 static grpc_json* parse_json_part_from_jwt(const char* str, size_t len,
                                            char** scratchpad) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   char* b64;
   char* decoded;
   grpc_json* json;
@@ -215,7 +215,7 @@ static grpc_json* parse_json_part_from_jwt(const char* str, size_t len,
   b64 = static_cast<char*>(gpr_malloc(len + 1));
   strncpy(b64, str, len);
   b64[len] = '\0';
-  slice = grpc_base64_decode(&exec_ctx, b64, 1);
+  slice = grpc_base64_decode(b64, 1);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(slice));
   decoded = static_cast<char*>(gpr_malloc(GRPC_SLICE_LENGTH(slice) + 1));
   strncpy(decoded, (const char*)GRPC_SLICE_START_PTR(slice),
@@ -225,7 +225,7 @@ static grpc_json* parse_json_part_from_jwt(const char* str, size_t len,
   gpr_free(b64);
   *scratchpad = decoded;
   grpc_slice_unref(slice);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return json;
 }
 
@@ -327,12 +327,12 @@ static void check_jwt_claim(grpc_json* claim, const char* expected_audience,
 static void check_jwt_signature(const char* b64_signature, RSA* rsa_key,
                                 const char* signed_data,
                                 size_t signed_data_size) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   EVP_MD_CTX* md_ctx = EVP_MD_CTX_create();
   EVP_PKEY* key = EVP_PKEY_new();
 
-  grpc_slice sig = grpc_base64_decode(&exec_ctx, b64_signature, 1);
+  grpc_slice sig = grpc_base64_decode(b64_signature, 1);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(sig));
   GPR_ASSERT(GRPC_SLICE_LENGTH(sig) == 128);
 
@@ -347,11 +347,9 @@ static void check_jwt_signature(const char* b64_signature, RSA* rsa_key,
   GPR_ASSERT(EVP_DigestVerifyFinal(md_ctx, GRPC_SLICE_START_PTR(sig),
                                    GRPC_SLICE_LENGTH(sig)) == 1);
 
-  grpc_slice_unref_internal(&exec_ctx, sig);
+  grpc_slice_unref_internal(sig);
   if (key != nullptr) EVP_PKEY_free(key);
   if (md_ctx != nullptr) EVP_MD_CTX_destroy(md_ctx);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static char* service_account_creds_jwt_encode_and_sign(
@@ -485,6 +483,7 @@ static void test_parse_refresh_token_failure_no_refresh_token(void) {
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_parse_json_key_success();
   test_parse_json_key_failure_bad_json();
   test_parse_json_key_failure_no_type();
@@ -499,5 +498,6 @@ int main(int argc, char** argv) {
   test_parse_refresh_token_failure_no_client_id();
   test_parse_refresh_token_failure_no_client_secret();
   test_parse_refresh_token_failure_no_refresh_token();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/security/jwt_verifier_test.cc b/test/core/security/jwt_verifier_test.cc
index df0ebe5607..e219260b1d 100644
--- a/test/core/security/jwt_verifier_test.cc
+++ b/test/core/security/jwt_verifier_test.cc
@@ -209,8 +209,8 @@ static void test_claims_success(void) {
   grpc_json* json = grpc_json_parse_string_with_len(
       (char*)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s));
   GPR_ASSERT(json != nullptr);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  claims = grpc_jwt_claims_from_json(&exec_ctx, json, s);
+  grpc_core::ExecCtx exec_ctx;
+  claims = grpc_jwt_claims_from_json(json, s);
   GPR_ASSERT(claims != nullptr);
   GPR_ASSERT(grpc_jwt_claims_json(claims) == json);
   GPR_ASSERT(strcmp(grpc_jwt_claims_audience(claims), "https://foo.com") == 0);
@@ -219,8 +219,7 @@ static void test_claims_success(void) {
   GPR_ASSERT(strcmp(grpc_jwt_claims_id(claims), "jwtuniqueid") == 0);
   GPR_ASSERT(grpc_jwt_claims_check(claims, "https://foo.com") ==
              GRPC_JWT_VERIFIER_OK);
-  grpc_jwt_claims_destroy(&exec_ctx, claims);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_claims_destroy(claims);
 }
 
 static void test_expired_claims_failure(void) {
@@ -232,8 +231,8 @@ static void test_expired_claims_failure(void) {
   gpr_timespec exp_exp = {120, 0, GPR_CLOCK_REALTIME};
   gpr_timespec exp_nbf = {60, 0, GPR_CLOCK_REALTIME};
   GPR_ASSERT(json != nullptr);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  claims = grpc_jwt_claims_from_json(&exec_ctx, json, s);
+  grpc_core::ExecCtx exec_ctx;
+  claims = grpc_jwt_claims_from_json(json, s);
   GPR_ASSERT(claims != nullptr);
   GPR_ASSERT(grpc_jwt_claims_json(claims) == json);
   GPR_ASSERT(strcmp(grpc_jwt_claims_audience(claims), "https://foo.com") == 0);
@@ -246,17 +245,15 @@ static void test_expired_claims_failure(void) {
 
   GPR_ASSERT(grpc_jwt_claims_check(claims, "https://foo.com") ==
              GRPC_JWT_VERIFIER_TIME_CONSTRAINT_FAILURE);
-  grpc_jwt_claims_destroy(&exec_ctx, claims);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_claims_destroy(claims);
 }
 
 static void test_invalid_claims_failure(void) {
   grpc_slice s = grpc_slice_from_copied_string(invalid_claims);
   grpc_json* json = grpc_json_parse_string_with_len(
       (char*)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GPR_ASSERT(grpc_jwt_claims_from_json(&exec_ctx, json, s) == nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GPR_ASSERT(grpc_jwt_claims_from_json(json, s) == nullptr);
 }
 
 static void test_bad_audience_claims_failure(void) {
@@ -265,13 +262,12 @@ static void test_bad_audience_claims_failure(void) {
   grpc_json* json = grpc_json_parse_string_with_len(
       (char*)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s));
   GPR_ASSERT(json != nullptr);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  claims = grpc_jwt_claims_from_json(&exec_ctx, json, s);
+  grpc_core::ExecCtx exec_ctx;
+  claims = grpc_jwt_claims_from_json(json, s);
   GPR_ASSERT(claims != nullptr);
   GPR_ASSERT(grpc_jwt_claims_check(claims, "https://bar.com") ==
              GRPC_JWT_VERIFIER_BAD_AUDIENCE);
-  grpc_jwt_claims_destroy(&exec_ctx, claims);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_claims_destroy(claims);
 }
 
 static void test_bad_subject_claims_failure(void) {
@@ -280,13 +276,12 @@ static void test_bad_subject_claims_failure(void) {
   grpc_json* json = grpc_json_parse_string_with_len(
       (char*)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s));
   GPR_ASSERT(json != nullptr);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  claims = grpc_jwt_claims_from_json(&exec_ctx, json, s);
+  grpc_core::ExecCtx exec_ctx;
+  claims = grpc_jwt_claims_from_json(json, s);
   GPR_ASSERT(claims != nullptr);
   GPR_ASSERT(grpc_jwt_claims_check(claims, "https://foo.com") ==
              GRPC_JWT_VERIFIER_BAD_SUBJECT);
-  grpc_jwt_claims_destroy(&exec_ctx, claims);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_claims_destroy(claims);
 }
 
 static char* json_key_str(const char* last_part) {
@@ -323,17 +318,16 @@ static grpc_httpcli_response http_response(int status, char* body) {
 }
 
 static int httpcli_post_should_not_be_called(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    const char* body_bytes, size_t body_size, grpc_millis deadline,
-    grpc_closure* on_done, grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, const char* body_bytes,
+    size_t body_size, grpc_millis deadline, grpc_closure* on_done,
+    grpc_httpcli_response* response) {
   GPR_ASSERT("HTTP POST should not be called" == nullptr);
   return 1;
 }
 
 static int httpcli_get_google_keys_for_email(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    grpc_millis deadline, grpc_closure* on_done,
-    grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, grpc_millis deadline,
+    grpc_closure* on_done, grpc_httpcli_response* response) {
   *response = http_response(200, good_google_email_keys());
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, "www.googleapis.com") == 0);
@@ -341,22 +335,22 @@ static int httpcli_get_google_keys_for_email(
                     "/robot/v1/metadata/x509/"
                     "777-abaslkan11hlb6nmim3bpspl31ud@developer."
                     "gserviceaccount.com") == 0);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
-static void on_verification_success(grpc_exec_ctx* exec_ctx, void* user_data,
+static void on_verification_success(void* user_data,
                                     grpc_jwt_verifier_status status,
                                     grpc_jwt_claims* claims) {
   GPR_ASSERT(status == GRPC_JWT_VERIFIER_OK);
   GPR_ASSERT(claims != nullptr);
   GPR_ASSERT(user_data == (void*)expected_user_data);
   GPR_ASSERT(strcmp(grpc_jwt_claims_audience(claims), expected_audience) == 0);
-  grpc_jwt_claims_destroy(exec_ctx, claims);
+  grpc_jwt_claims_destroy(claims);
 }
 
 static void test_jwt_verifier_google_email_issuer_success(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(nullptr, 0);
   char* jwt = nullptr;
   char* key_str = json_key_str(json_key_str_part3_for_google_email_issuer);
@@ -369,28 +363,27 @@ static void test_jwt_verifier_google_email_issuer_success(void) {
                                  nullptr);
   grpc_auth_json_key_destruct(&key);
   GPR_ASSERT(jwt != nullptr);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, jwt, expected_audience,
+  grpc_jwt_verifier_verify(verifier, nullptr, jwt, expected_audience,
                            on_verification_success, (void*)expected_user_data);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(jwt);
   grpc_httpcli_set_override(nullptr, nullptr);
 }
 
 static int httpcli_get_custom_keys_for_email(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    grpc_millis deadline, grpc_closure* on_done,
-    grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, grpc_millis deadline,
+    grpc_closure* on_done, grpc_httpcli_response* response) {
   *response = http_response(200, gpr_strdup(good_jwk_set));
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, "keys.bar.com") == 0);
   GPR_ASSERT(strcmp(request->http.path, "/jwk/foo@bar.com") == 0);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static void test_jwt_verifier_custom_email_issuer_success(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(&custom_mapping, 1);
   char* jwt = nullptr;
   char* key_str = json_key_str(json_key_str_part3_for_custom_email_issuer);
@@ -403,28 +396,26 @@ static void test_jwt_verifier_custom_email_issuer_success(void) {
                                  nullptr);
   grpc_auth_json_key_destruct(&key);
   GPR_ASSERT(jwt != nullptr);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, jwt, expected_audience,
+  grpc_jwt_verifier_verify(verifier, nullptr, jwt, expected_audience,
                            on_verification_success, (void*)expected_user_data);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(jwt);
   grpc_httpcli_set_override(nullptr, nullptr);
 }
 
-static int httpcli_get_jwk_set(grpc_exec_ctx* exec_ctx,
-                               const grpc_httpcli_request* request,
+static int httpcli_get_jwk_set(const grpc_httpcli_request* request,
                                grpc_millis deadline, grpc_closure* on_done,
                                grpc_httpcli_response* response) {
   *response = http_response(200, gpr_strdup(good_jwk_set));
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, "www.googleapis.com") == 0);
   GPR_ASSERT(strcmp(request->http.path, "/oauth2/v3/certs") == 0);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
-static int httpcli_get_openid_config(grpc_exec_ctx* exec_ctx,
-                                     const grpc_httpcli_request* request,
+static int httpcli_get_openid_config(const grpc_httpcli_request* request,
                                      grpc_millis deadline,
                                      grpc_closure* on_done,
                                      grpc_httpcli_response* response) {
@@ -434,12 +425,12 @@ static int httpcli_get_openid_config(grpc_exec_ctx* exec_ctx,
   GPR_ASSERT(strcmp(request->http.path, GRPC_OPENID_CONFIG_URL_SUFFIX) == 0);
   grpc_httpcli_set_override(httpcli_get_jwk_set,
                             httpcli_post_should_not_be_called);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static void test_jwt_verifier_url_issuer_success(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(nullptr, 0);
   char* jwt = nullptr;
   char* key_str = json_key_str(json_key_str_part3_for_url_issuer);
@@ -452,16 +443,15 @@ static void test_jwt_verifier_url_issuer_success(void) {
                                  nullptr);
   grpc_auth_json_key_destruct(&key);
   GPR_ASSERT(jwt != nullptr);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, jwt, expected_audience,
+  grpc_jwt_verifier_verify(verifier, nullptr, jwt, expected_audience,
                            on_verification_success, (void*)expected_user_data);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(jwt);
   grpc_httpcli_set_override(nullptr, nullptr);
 }
 
-static void on_verification_key_retrieval_error(grpc_exec_ctx* exec_ctx,
-                                                void* user_data,
+static void on_verification_key_retrieval_error(void* user_data,
                                                 grpc_jwt_verifier_status status,
                                                 grpc_jwt_claims* claims) {
   GPR_ASSERT(status == GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR);
@@ -469,18 +459,17 @@ static void on_verification_key_retrieval_error(grpc_exec_ctx* exec_ctx,
   GPR_ASSERT(user_data == (void*)expected_user_data);
 }
 
-static int httpcli_get_bad_json(grpc_exec_ctx* exec_ctx,
-                                const grpc_httpcli_request* request,
+static int httpcli_get_bad_json(const grpc_httpcli_request* request,
                                 grpc_millis deadline, grpc_closure* on_done,
                                 grpc_httpcli_response* response) {
   *response = http_response(200, gpr_strdup("{\"bad\": \"stuff\"}"));
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static void test_jwt_verifier_url_issuer_bad_config(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(nullptr, 0);
   char* jwt = nullptr;
   char* key_str = json_key_str(json_key_str_part3_for_url_issuer);
@@ -493,17 +482,17 @@ static void test_jwt_verifier_url_issuer_bad_config(void) {
                                  nullptr);
   grpc_auth_json_key_destruct(&key);
   GPR_ASSERT(jwt != nullptr);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, jwt, expected_audience,
+  grpc_jwt_verifier_verify(verifier, nullptr, jwt, expected_audience,
                            on_verification_key_retrieval_error,
                            (void*)expected_user_data);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(jwt);
   grpc_httpcli_set_override(nullptr, nullptr);
 }
 
 static void test_jwt_verifier_bad_json_key(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(nullptr, 0);
   char* jwt = nullptr;
   char* key_str = json_key_str(json_key_str_part3_for_google_email_issuer);
@@ -516,11 +505,11 @@ static void test_jwt_verifier_bad_json_key(void) {
                                  nullptr);
   grpc_auth_json_key_destruct(&key);
   GPR_ASSERT(jwt != nullptr);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, jwt, expected_audience,
+  grpc_jwt_verifier_verify(verifier, nullptr, jwt, expected_audience,
                            on_verification_key_retrieval_error,
                            (void*)expected_user_data);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(jwt);
   grpc_httpcli_set_override(nullptr, nullptr);
 }
@@ -532,9 +521,8 @@ static void corrupt_jwt_sig(char* jwt) {
   char* last_dot = strrchr(jwt, '.');
   GPR_ASSERT(last_dot != nullptr);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    sig = grpc_base64_decode(&exec_ctx, last_dot + 1, 1);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    sig = grpc_base64_decode(last_dot + 1, 1);
   }
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(sig));
   sig_bytes = GRPC_SLICE_START_PTR(sig);
@@ -546,8 +534,7 @@ static void corrupt_jwt_sig(char* jwt) {
   grpc_slice_unref(sig);
 }
 
-static void on_verification_bad_signature(grpc_exec_ctx* exec_ctx,
-                                          void* user_data,
+static void on_verification_bad_signature(void* user_data,
                                           grpc_jwt_verifier_status status,
                                           grpc_jwt_claims* claims) {
   GPR_ASSERT(status == GRPC_JWT_VERIFIER_BAD_SIGNATURE);
@@ -556,7 +543,7 @@ static void on_verification_bad_signature(grpc_exec_ctx* exec_ctx,
 }
 
 static void test_jwt_verifier_bad_signature(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(nullptr, 0);
   char* jwt = nullptr;
   char* key_str = json_key_str(json_key_str_part3_for_url_issuer);
@@ -570,17 +557,16 @@ static void test_jwt_verifier_bad_signature(void) {
   grpc_auth_json_key_destruct(&key);
   corrupt_jwt_sig(jwt);
   GPR_ASSERT(jwt != nullptr);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, jwt, expected_audience,
+  grpc_jwt_verifier_verify(verifier, nullptr, jwt, expected_audience,
                            on_verification_bad_signature,
                            (void*)expected_user_data);
   gpr_free(jwt);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   grpc_httpcli_set_override(nullptr, nullptr);
 }
 
-static int httpcli_get_should_not_be_called(grpc_exec_ctx* exec_ctx,
-                                            const grpc_httpcli_request* request,
+static int httpcli_get_should_not_be_called(const grpc_httpcli_request* request,
                                             grpc_millis deadline,
                                             grpc_closure* on_done,
                                             grpc_httpcli_response* response) {
@@ -588,7 +574,7 @@ static int httpcli_get_should_not_be_called(grpc_exec_ctx* exec_ctx,
   return 1;
 }
 
-static void on_verification_bad_format(grpc_exec_ctx* exec_ctx, void* user_data,
+static void on_verification_bad_format(void* user_data,
                                        grpc_jwt_verifier_status status,
                                        grpc_jwt_claims* claims) {
   GPR_ASSERT(status == GRPC_JWT_VERIFIER_BAD_FORMAT);
@@ -597,15 +583,15 @@ static void on_verification_bad_format(grpc_exec_ctx* exec_ctx, void* user_data,
 }
 
 static void test_jwt_verifier_bad_format(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(nullptr, 0);
   grpc_httpcli_set_override(httpcli_get_should_not_be_called,
                             httpcli_post_should_not_be_called);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, "bad jwt",
-                           expected_audience, on_verification_bad_format,
+  grpc_jwt_verifier_verify(verifier, nullptr, "bad jwt", expected_audience,
+                           on_verification_bad_format,
                            (void*)expected_user_data);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   grpc_httpcli_set_override(nullptr, nullptr);
 }
 
diff --git a/test/core/security/oauth2_utils.cc b/test/core/security/oauth2_utils.cc
index 602041eecc..0d3a1279af 100644
--- a/test/core/security/oauth2_utils.cc
+++ b/test/core/security/oauth2_utils.cc
@@ -39,8 +39,7 @@ typedef struct {
   grpc_closure closure;
 } oauth2_request;
 
-static void on_oauth2_response(grpc_exec_ctx* exec_ctx, void* arg,
-                               grpc_error* error) {
+static void on_oauth2_response(void* arg, grpc_error* error) {
   oauth2_request* request = (oauth2_request*)arg;
   char* token = nullptr;
   grpc_slice token_slice;
@@ -54,25 +53,23 @@ static void on_oauth2_response(grpc_exec_ctx* exec_ctx, void* arg,
            GRPC_SLICE_LENGTH(token_slice));
     token[GRPC_SLICE_LENGTH(token_slice)] = '\0';
   }
-  grpc_credentials_mdelem_array_destroy(exec_ctx, &request->md_array);
+  grpc_credentials_mdelem_array_destroy(&request->md_array);
   gpr_mu_lock(request->mu);
   request->is_done = true;
   request->token = token;
   GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&request->pops),
-                        nullptr));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&request->pops), nullptr));
   gpr_mu_unlock(request->mu);
 }
 
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* unused,
-                       grpc_error* error) {}
+static void do_nothing(void* unused, grpc_error* error) {}
 
 char* grpc_test_fetch_oauth2_token_with_credentials(
     grpc_call_credentials* creds) {
   oauth2_request request;
   memset(&request, 0, sizeof(request));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_closure do_nothing_closure;
   grpc_auth_metadata_context null_ctx = {"", "", nullptr, nullptr};
 
@@ -88,31 +85,30 @@ char* grpc_test_fetch_oauth2_token_with_credentials(
                     grpc_schedule_on_exec_ctx);
 
   grpc_error* error = GRPC_ERROR_NONE;
-  if (grpc_call_credentials_get_request_metadata(
-          &exec_ctx, creds, &request.pops, null_ctx, &request.md_array,
-          &request.closure, &error)) {
+  if (grpc_call_credentials_get_request_metadata(creds, &request.pops, null_ctx,
+                                                 &request.md_array,
+                                                 &request.closure, &error)) {
     // Synchronous result; invoke callback directly.
-    on_oauth2_response(&exec_ctx, &request, error);
+    on_oauth2_response(&request, error);
     GRPC_ERROR_UNREF(error);
   }
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   gpr_mu_lock(request.mu);
   while (!request.is_done) {
     grpc_pollset_worker* worker = nullptr;
     if (!GRPC_LOG_IF_ERROR(
             "pollset_work",
-            grpc_pollset_work(&exec_ctx,
-                              grpc_polling_entity_pollset(&request.pops),
+            grpc_pollset_work(grpc_polling_entity_pollset(&request.pops),
                               &worker, GRPC_MILLIS_INF_FUTURE))) {
       request.is_done = true;
     }
   }
   gpr_mu_unlock(request.mu);
 
-  grpc_pollset_shutdown(&exec_ctx, grpc_polling_entity_pollset(&request.pops),
+  grpc_pollset_shutdown(grpc_polling_entity_pollset(&request.pops),
                         &do_nothing_closure);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   gpr_free(grpc_polling_entity_pollset(&request.pops));
   return request.token;
 }
diff --git a/test/core/security/print_google_default_creds_token.cc b/test/core/security/print_google_default_creds_token.cc
index f4acf023bd..b3742f58a8 100644
--- a/test/core/security/print_google_default_creds_token.cc
+++ b/test/core/security/print_google_default_creds_token.cc
@@ -41,8 +41,7 @@ typedef struct {
   grpc_closure on_request_metadata;
 } synchronizer;
 
-static void on_metadata_response(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void on_metadata_response(void* arg, grpc_error* error) {
   synchronizer* sync = static_cast<synchronizer*>(arg);
   if (error != GRPC_ERROR_NONE) {
     fprintf(stderr, "Fetching token failed: %s\n", grpc_error_string(error));
@@ -57,14 +56,13 @@ static void on_metadata_response(grpc_exec_ctx* exec_ctx, void* arg,
   sync->is_done = true;
   GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&sync->pops),
-                        nullptr));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&sync->pops), nullptr));
   gpr_mu_unlock(sync->mu);
 }
 
 int main(int argc, char** argv) {
   int result = 0;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   synchronizer sync;
   grpc_channel_credentials* creds = nullptr;
   const char* service_url = "https://test.foo.google.com/Foo";
@@ -97,11 +95,10 @@ int main(int argc, char** argv) {
 
   error = GRPC_ERROR_NONE;
   if (grpc_call_credentials_get_request_metadata(
-          &exec_ctx, ((grpc_composite_channel_credentials*)creds)->call_creds,
-          &sync.pops, context, &sync.md_array, &sync.on_request_metadata,
-          &error)) {
+          ((grpc_composite_channel_credentials*)creds)->call_creds, &sync.pops,
+          context, &sync.md_array, &sync.on_request_metadata, &error)) {
     // Synchronous response.  Invoke callback directly.
-    on_metadata_response(&exec_ctx, &sync, error);
+    on_metadata_response(&sync, error);
     GRPC_ERROR_UNREF(error);
   }
 
@@ -110,18 +107,15 @@ int main(int argc, char** argv) {
     grpc_pollset_worker* worker = nullptr;
     if (!GRPC_LOG_IF_ERROR(
             "pollset_work",
-            grpc_pollset_work(&exec_ctx,
-                              grpc_polling_entity_pollset(&sync.pops), &worker,
+            grpc_pollset_work(grpc_polling_entity_pollset(&sync.pops), &worker,
                               GRPC_MILLIS_INF_FUTURE)))
       sync.is_done = true;
     gpr_mu_unlock(sync.mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(sync.mu);
   }
   gpr_mu_unlock(sync.mu);
 
-  grpc_exec_ctx_finish(&exec_ctx);
-
   grpc_channel_credentials_release(creds);
   gpr_free(grpc_polling_entity_pollset(&sync.pops));
 
diff --git a/test/core/security/secure_endpoint_test.cc b/test/core/security/secure_endpoint_test.cc
index a12af02479..38c78fed42 100644
--- a/test/core/security/secure_endpoint_test.cc
+++ b/test/core/security/secure_endpoint_test.cc
@@ -38,7 +38,7 @@ static grpc_pollset* g_pollset;
 static grpc_endpoint_test_fixture secure_endpoint_create_fixture_tcp_socketpair(
     size_t slice_size, grpc_slice* leftover_slices, size_t leftover_nslices,
     bool use_zero_copy_protector) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   tsi_frame_protector* fake_read_protector =
       tsi_create_fake_frame_protector(nullptr);
   tsi_frame_protector* fake_write_protector =
@@ -60,8 +60,8 @@ static grpc_endpoint_test_fixture secure_endpoint_create_fixture_tcp_socketpair(
   a[0].value.integer = (int)slice_size;
   grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
   tcp = grpc_iomgr_create_endpoint_pair("fixture", &args);
-  grpc_endpoint_add_to_pollset(&exec_ctx, tcp.client, g_pollset);
-  grpc_endpoint_add_to_pollset(&exec_ctx, tcp.server, g_pollset);
+  grpc_endpoint_add_to_pollset(tcp.client, g_pollset);
+  grpc_endpoint_add_to_pollset(tcp.server, g_pollset);
 
   if (leftover_nslices == 0) {
     f.client_ep = grpc_secure_endpoint_create(fake_read_protector,
@@ -117,7 +117,7 @@ static grpc_endpoint_test_fixture secure_endpoint_create_fixture_tcp_socketpair(
   f.server_ep = grpc_secure_endpoint_create(fake_write_protector,
                                             fake_write_zero_copy_protector,
                                             tcp.server, nullptr, 0);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return f;
 }
 
@@ -165,65 +165,62 @@ static grpc_endpoint_test_config configs[] = {
      clean_up},
 };
 
-static void inc_call_ctr(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
-  ++*(int*)arg;
-}
+static void inc_call_ctr(void* arg, grpc_error* error) { ++*(int*)arg; }
 
 static void test_leftover(grpc_endpoint_test_config config, size_t slice_size) {
   grpc_endpoint_test_fixture f = config.create_fixture(slice_size);
   grpc_slice_buffer incoming;
   grpc_slice s =
       grpc_slice_from_copied_string("hello world 12345678900987654321");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   int n = 0;
   grpc_closure done_closure;
   gpr_log(GPR_INFO, "Start test left over");
 
   grpc_slice_buffer_init(&incoming);
   GRPC_CLOSURE_INIT(&done_closure, inc_call_ctr, &n, grpc_schedule_on_exec_ctx);
-  grpc_endpoint_read(&exec_ctx, f.client_ep, &incoming, &done_closure);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_endpoint_read(f.client_ep, &incoming, &done_closure);
+
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(n == 1);
   GPR_ASSERT(incoming.count == 1);
   GPR_ASSERT(grpc_slice_eq(s, incoming.slices[0]));
 
   grpc_endpoint_shutdown(
-      &exec_ctx, f.client_ep,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("test_leftover end"));
+      f.client_ep, GRPC_ERROR_CREATE_FROM_STATIC_STRING("test_leftover end"));
   grpc_endpoint_shutdown(
-      &exec_ctx, f.server_ep,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("test_leftover end"));
-  grpc_endpoint_destroy(&exec_ctx, f.client_ep);
-  grpc_endpoint_destroy(&exec_ctx, f.server_ep);
-  grpc_exec_ctx_finish(&exec_ctx);
-  grpc_slice_unref_internal(&exec_ctx, s);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &incoming);
+      f.server_ep, GRPC_ERROR_CREATE_FROM_STATIC_STRING("test_leftover end"));
+  grpc_endpoint_destroy(f.client_ep);
+  grpc_endpoint_destroy(f.server_ep);
+
+  grpc_slice_unref_internal(s);
+  grpc_slice_buffer_destroy_internal(&incoming);
 
   clean_up();
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, (grpc_pollset*)p);
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy((grpc_pollset*)p);
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
-
   grpc_init();
-  g_pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
-  grpc_pollset_init(g_pollset, &g_mu);
-  grpc_endpoint_tests(configs[0], g_pollset, g_mu);
-  grpc_endpoint_tests(configs[1], g_pollset, g_mu);
-  test_leftover(configs[2], 1);
-  test_leftover(configs[3], 1);
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
+    grpc_pollset_init(g_pollset, &g_mu);
+    grpc_endpoint_tests(configs[0], g_pollset, g_mu);
+    grpc_endpoint_tests(configs[1], g_pollset, g_mu);
+    test_leftover(configs[2], 1);
+    test_leftover(configs[3], 1);
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
+  }
+
   grpc_shutdown();
 
   gpr_free(g_pollset);
diff --git a/test/core/security/ssl_server_fuzzer.cc b/test/core/security/ssl_server_fuzzer.cc
index d83ebb18d2..6e30698562 100644
--- a/test/core/security/ssl_server_fuzzer.cc
+++ b/test/core/security/ssl_server_fuzzer.cc
@@ -40,8 +40,7 @@ struct handshake_state {
   bool done_callback_called;
 };
 
-static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* error) {
+static void on_handshake_done(void* arg, grpc_error* error) {
   grpc_handshaker_args* args = static_cast<grpc_handshaker_args*>(arg);
   struct handshake_state* state =
       static_cast<struct handshake_state*>(args->user_data);
@@ -56,67 +55,70 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   if (squelch) gpr_set_log_function(dont_log);
   if (leak_check) grpc_memory_counters_init();
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-
-  grpc_resource_quota* resource_quota =
-      grpc_resource_quota_create("ssl_server_fuzzer");
-  grpc_endpoint* mock_endpoint =
-      grpc_mock_endpoint_create(discard_write, resource_quota);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
-
-  grpc_mock_endpoint_put_read(
-      &exec_ctx, mock_endpoint,
-      grpc_slice_from_copied_buffer((const char*)data, size));
-
-  // Load key pair and establish server SSL credentials.
-  grpc_ssl_pem_key_cert_pair pem_key_cert_pair;
-  grpc_slice ca_slice, cert_slice, key_slice;
-  ca_slice = grpc_slice_from_static_string(test_root_cert);
-  cert_slice = grpc_slice_from_static_string(test_server1_cert);
-  key_slice = grpc_slice_from_static_string(test_server1_key);
-  const char* ca_cert = (const char*)GRPC_SLICE_START_PTR(ca_slice);
-  pem_key_cert_pair.private_key = (const char*)GRPC_SLICE_START_PTR(key_slice);
-  pem_key_cert_pair.cert_chain = (const char*)GRPC_SLICE_START_PTR(cert_slice);
-  grpc_server_credentials* creds = grpc_ssl_server_credentials_create(
-      ca_cert, &pem_key_cert_pair, 1, 0, nullptr);
-
-  // Create security connector
-  grpc_server_security_connector* sc = nullptr;
-  grpc_security_status status =
-      grpc_server_credentials_create_security_connector(&exec_ctx, creds, &sc);
-  GPR_ASSERT(status == GRPC_SECURITY_OK);
-  grpc_millis deadline = GPR_MS_PER_SEC + grpc_exec_ctx_now(&exec_ctx);
-
-  struct handshake_state state;
-  state.done_callback_called = false;
-  grpc_handshake_manager* handshake_mgr = grpc_handshake_manager_create();
-  grpc_server_security_connector_add_handshakers(&exec_ctx, sc, handshake_mgr);
-  grpc_handshake_manager_do_handshake(
-      &exec_ctx, handshake_mgr, nullptr /* interested_parties */, mock_endpoint,
-      nullptr /* channel_args */, deadline, nullptr /* acceptor */,
-      on_handshake_done, &state);
-  grpc_exec_ctx_flush(&exec_ctx);
-
-  // If the given string happens to be part of the correct client hello, the
-  // server will wait for more data. Explicitly fail the server by shutting down
-  // the endpoint.
-  if (!state.done_callback_called) {
-    grpc_endpoint_shutdown(
-        &exec_ctx, mock_endpoint,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Explicit close"));
-    grpc_exec_ctx_flush(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+
+    grpc_resource_quota* resource_quota =
+        grpc_resource_quota_create("ssl_server_fuzzer");
+    grpc_endpoint* mock_endpoint =
+        grpc_mock_endpoint_create(discard_write, resource_quota);
+    grpc_resource_quota_unref_internal(resource_quota);
+
+    grpc_mock_endpoint_put_read(
+        mock_endpoint, grpc_slice_from_copied_buffer((const char*)data, size));
+
+    // Load key pair and establish server SSL credentials.
+    grpc_ssl_pem_key_cert_pair pem_key_cert_pair;
+    grpc_slice ca_slice, cert_slice, key_slice;
+    ca_slice = grpc_slice_from_static_string(test_root_cert);
+    cert_slice = grpc_slice_from_static_string(test_server1_cert);
+    key_slice = grpc_slice_from_static_string(test_server1_key);
+    const char* ca_cert = (const char*)GRPC_SLICE_START_PTR(ca_slice);
+    pem_key_cert_pair.private_key =
+        (const char*)GRPC_SLICE_START_PTR(key_slice);
+    pem_key_cert_pair.cert_chain =
+        (const char*)GRPC_SLICE_START_PTR(cert_slice);
+    grpc_server_credentials* creds = grpc_ssl_server_credentials_create(
+        ca_cert, &pem_key_cert_pair, 1, 0, nullptr);
+
+    // Create security connector
+    grpc_server_security_connector* sc = nullptr;
+    grpc_security_status status =
+        grpc_server_credentials_create_security_connector(creds, &sc);
+    GPR_ASSERT(status == GRPC_SECURITY_OK);
+    grpc_millis deadline = GPR_MS_PER_SEC + grpc_core::ExecCtx::Get()->Now();
+
+    struct handshake_state state;
+    state.done_callback_called = false;
+    grpc_handshake_manager* handshake_mgr = grpc_handshake_manager_create();
+    grpc_server_security_connector_add_handshakers(sc, handshake_mgr);
+    grpc_handshake_manager_do_handshake(
+        handshake_mgr, nullptr /* interested_parties */, mock_endpoint,
+        nullptr /* channel_args */, deadline, nullptr /* acceptor */,
+        on_handshake_done, &state);
+    grpc_core::ExecCtx::Get()->Flush();
+
+    // If the given string happens to be part of the correct client hello, the
+    // server will wait for more data. Explicitly fail the server by shutting
+    // down the endpoint.
+    if (!state.done_callback_called) {
+      grpc_endpoint_shutdown(
+          mock_endpoint,
+          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Explicit close"));
+      grpc_core::ExecCtx::Get()->Flush();
+    }
+
+    GPR_ASSERT(state.done_callback_called);
+
+    grpc_handshake_manager_destroy(handshake_mgr);
+    GRPC_SECURITY_CONNECTOR_UNREF(&sc->base, "test");
+    grpc_server_credentials_release(creds);
+    grpc_slice_unref(cert_slice);
+    grpc_slice_unref(key_slice);
+    grpc_slice_unref(ca_slice);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
-  GPR_ASSERT(state.done_callback_called);
-
-  grpc_handshake_manager_destroy(&exec_ctx, handshake_mgr);
-  GRPC_SECURITY_CONNECTOR_UNREF(&exec_ctx, &sc->base, "test");
-  grpc_server_credentials_release(creds);
-  grpc_slice_unref(cert_slice);
-  grpc_slice_unref(key_slice);
-  grpc_slice_unref(ca_slice);
-  grpc_exec_ctx_flush(&exec_ctx);
-
   grpc_shutdown();
   if (leak_check) {
     counters = grpc_memory_counters_snapshot();
diff --git a/test/core/security/verify_jwt.cc b/test/core/security/verify_jwt.cc
index 787d58bc37..e039970c67 100644
--- a/test/core/security/verify_jwt.cc
+++ b/test/core/security/verify_jwt.cc
@@ -44,7 +44,7 @@ static void print_usage_and_exit(gpr_cmdline* cl, const char* argv0) {
   exit(1);
 }
 
-static void on_jwt_verification_done(grpc_exec_ctx* exec_ctx, void* user_data,
+static void on_jwt_verification_done(void* user_data,
                                      grpc_jwt_verifier_status status,
                                      grpc_jwt_claims* claims) {
   synchronizer* sync = static_cast<synchronizer*>(user_data);
@@ -57,7 +57,7 @@ static void on_jwt_verification_done(grpc_exec_ctx* exec_ctx, void* user_data,
         grpc_json_dump_to_string((grpc_json*)grpc_jwt_claims_json(claims), 2);
     printf("Claims: \n\n%s\n", claims_str);
     gpr_free(claims_str);
-    grpc_jwt_claims_destroy(exec_ctx, claims);
+    grpc_jwt_claims_destroy(claims);
   } else {
     GPR_ASSERT(claims == nullptr);
     fprintf(stderr, "Verification failed with error %s\n",
@@ -66,8 +66,7 @@ static void on_jwt_verification_done(grpc_exec_ctx* exec_ctx, void* user_data,
 
   gpr_mu_lock(sync->mu);
   sync->is_done = 1;
-  GRPC_LOG_IF_ERROR("pollset_kick",
-                    grpc_pollset_kick(exec_ctx, sync->pollset, nullptr));
+  GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(sync->pollset, nullptr));
   gpr_mu_unlock(sync->mu);
 }
 
@@ -77,7 +76,7 @@ int main(int argc, char** argv) {
   gpr_cmdline* cl;
   const char* jwt = nullptr;
   const char* aud = nullptr;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   grpc_init();
   cl = gpr_cmdline_create("JWT verifier tool");
@@ -96,26 +95,26 @@ int main(int argc, char** argv) {
   grpc_pollset_init(sync.pollset, &sync.mu);
   sync.is_done = 0;
 
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, sync.pollset, jwt, aud,
+  grpc_jwt_verifier_verify(verifier, sync.pollset, jwt, aud,
                            on_jwt_verification_done, &sync);
 
   gpr_mu_lock(sync.mu);
   while (!sync.is_done) {
     grpc_pollset_worker* worker = nullptr;
-    if (!GRPC_LOG_IF_ERROR("pollset_work",
-                           grpc_pollset_work(&exec_ctx, sync.pollset, &worker,
-                                             GRPC_MILLIS_INF_FUTURE)))
+    if (!GRPC_LOG_IF_ERROR(
+            "pollset_work",
+            grpc_pollset_work(sync.pollset, &worker, GRPC_MILLIS_INF_FUTURE)))
       sync.is_done = true;
     gpr_mu_unlock(sync.mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(sync.mu);
   }
   gpr_mu_unlock(sync.mu);
 
   gpr_free(sync.pollset);
 
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+
   gpr_cmdline_destroy(cl);
   grpc_shutdown();
   return !sync.success;
diff --git a/test/core/slice/b64_test.cc b/test/core/slice/b64_test.cc
index 479198f9f9..94785fd1e2 100644
--- a/test/core/slice/b64_test.cc
+++ b/test/core/slice/b64_test.cc
@@ -20,6 +20,7 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/slice.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
@@ -44,14 +45,14 @@ static void test_simple_encode_decode_b64(int url_safe, int multiline) {
   const char* hello = "hello";
   char* hello_b64 =
       grpc_base64_encode(hello, strlen(hello), url_safe, multiline);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice hello_slice = grpc_base64_decode(&exec_ctx, hello_b64, url_safe);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice hello_slice = grpc_base64_decode(hello_b64, url_safe);
   GPR_ASSERT(GRPC_SLICE_LENGTH(hello_slice) == strlen(hello));
   GPR_ASSERT(strncmp((const char*)GRPC_SLICE_START_PTR(hello_slice), hello,
                      GRPC_SLICE_LENGTH(hello_slice)) == 0);
 
-  grpc_slice_unref_internal(&exec_ctx, hello_slice);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_unref_internal(hello_slice);
+
   gpr_free(hello_b64);
 }
 
@@ -64,15 +65,14 @@ static void test_full_range_encode_decode_b64(int url_safe, int multiline) {
 
   /* Try all the different paddings. */
   for (i = 0; i < 3; i++) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     b64 = grpc_base64_encode(orig, sizeof(orig) - i, url_safe, multiline);
-    orig_decoded = grpc_base64_decode(&exec_ctx, b64, url_safe);
+    orig_decoded = grpc_base64_decode(b64, url_safe);
     GPR_ASSERT(GRPC_SLICE_LENGTH(orig_decoded) == (sizeof(orig) - i));
     GPR_ASSERT(buffers_are_equal(orig, GRPC_SLICE_START_PTR(orig_decoded),
                                  sizeof(orig) - i));
-    grpc_slice_unref_internal(&exec_ctx, orig_decoded);
+    grpc_slice_unref_internal(orig_decoded);
     gpr_free(b64);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 }
 
@@ -116,19 +116,18 @@ static void test_url_safe_unsafe_mismatch_failure(void) {
   int url_safe = 1;
   for (i = 0; i < sizeof(orig); i++) orig[i] = (uint8_t)i;
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   b64 = grpc_base64_encode(orig, sizeof(orig), url_safe, 0);
-  orig_decoded = grpc_base64_decode(&exec_ctx, b64, !url_safe);
+  orig_decoded = grpc_base64_decode(b64, !url_safe);
   GPR_ASSERT(GRPC_SLICE_IS_EMPTY(orig_decoded));
   gpr_free(b64);
-  grpc_slice_unref_internal(&exec_ctx, orig_decoded);
+  grpc_slice_unref_internal(orig_decoded);
 
   b64 = grpc_base64_encode(orig, sizeof(orig), !url_safe, 0);
-  orig_decoded = grpc_base64_decode(&exec_ctx, b64, url_safe);
+  orig_decoded = grpc_base64_decode(b64, url_safe);
   GPR_ASSERT(GRPC_SLICE_IS_EMPTY(orig_decoded));
   gpr_free(b64);
-  grpc_slice_unref_internal(&exec_ctx, orig_decoded);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_unref_internal(orig_decoded);
 }
 
 static void test_rfc4648_test_vectors(void) {
@@ -166,44 +165,44 @@ static void test_rfc4648_test_vectors(void) {
 static void test_unpadded_decode(void) {
   grpc_slice decoded;
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  decoded = grpc_base64_decode(&exec_ctx, "Zm9vYmFy", 0);
+  grpc_core::ExecCtx exec_ctx;
+  decoded = grpc_base64_decode("Zm9vYmFy", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "foobar") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode(&exec_ctx, "Zm9vYmE", 0);
+  decoded = grpc_base64_decode("Zm9vYmE", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "fooba") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode(&exec_ctx, "Zm9vYg", 0);
+  decoded = grpc_base64_decode("Zm9vYg", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "foob") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode(&exec_ctx, "Zm9v", 0);
+  decoded = grpc_base64_decode("Zm9v", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "foo") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode(&exec_ctx, "Zm8", 0);
+  decoded = grpc_base64_decode("Zm8", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "fo") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode(&exec_ctx, "Zg", 0);
+  decoded = grpc_base64_decode("Zg", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "f") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode(&exec_ctx, "", 0);
+  decoded = grpc_base64_decode("", 0);
   GPR_ASSERT(GRPC_SLICE_IS_EMPTY(decoded));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_simple_encode_decode_b64_no_multiline();
   test_simple_encode_decode_b64_multiline();
   test_simple_encode_decode_b64_urlsafe_no_multiline();
@@ -215,5 +214,6 @@ int main(int argc, char** argv) {
   test_url_safe_unsafe_mismatch_failure();
   test_rfc4648_test_vectors();
   test_unpadded_decode();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/slice/percent_decode_fuzzer.cc b/test/core/slice/percent_decode_fuzzer.cc
index 3603177c47..81eb031014 100644
--- a/test/core/slice/percent_decode_fuzzer.cc
+++ b/test/core/slice/percent_decode_fuzzer.cc
@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 
@@ -31,6 +32,7 @@ bool leak_check = true;
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   struct grpc_memory_counters counters;
+  grpc_init();
   grpc_memory_counters_init();
   grpc_slice input = grpc_slice_from_copied_buffer((const char*)data, size);
   grpc_slice output;
@@ -46,6 +48,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_slice_unref(input);
   counters = grpc_memory_counters_snapshot();
   grpc_memory_counters_destroy();
+  grpc_shutdown();
   GPR_ASSERT(counters.total_size_relative == 0);
   return 0;
 }
diff --git a/test/core/slice/percent_encode_fuzzer.cc b/test/core/slice/percent_encode_fuzzer.cc
index c8e3849fc8..201ae2790e 100644
--- a/test/core/slice/percent_encode_fuzzer.cc
+++ b/test/core/slice/percent_encode_fuzzer.cc
@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 
@@ -31,6 +32,7 @@ bool leak_check = true;
 
 static void test(const uint8_t* data, size_t size, const uint8_t* dict) {
   struct grpc_memory_counters counters;
+  grpc_init();
   grpc_memory_counters_init();
   grpc_slice input = grpc_slice_from_copied_buffer((const char*)data, size);
   grpc_slice output = grpc_percent_encode_slice(input, dict);
@@ -48,6 +50,7 @@ static void test(const uint8_t* data, size_t size, const uint8_t* dict) {
   grpc_slice_unref(permissive_decoded_output);
   counters = grpc_memory_counters_snapshot();
   grpc_memory_counters_destroy();
+  grpc_shutdown();
   GPR_ASSERT(counters.total_size_relative == 0);
 }
 
diff --git a/test/core/slice/percent_encoding_test.cc b/test/core/slice/percent_encoding_test.cc
index 253240faad..11f3995f98 100644
--- a/test/core/slice/percent_encoding_test.cc
+++ b/test/core/slice/percent_encoding_test.cc
@@ -18,6 +18,7 @@
 
 #include "src/core/lib/slice/percent_encoding.h"
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 
@@ -118,6 +119,7 @@ static void test_nonconformant_vector(const char* encoded,
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   TEST_VECTOR(
       "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.~",
       "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.~",
@@ -140,5 +142,6 @@ int main(int argc, char** argv) {
                             grpc_url_percent_encoding_unreserved_bytes);
   TEST_NONCONFORMANT_VECTOR("\0", "\0",
                             grpc_url_percent_encoding_unreserved_bytes);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/slice/slice_buffer_test.cc b/test/core/slice/slice_buffer_test.cc
index 338e8079dc..e59986730b 100644
--- a/test/core/slice/slice_buffer_test.cc
+++ b/test/core/slice/slice_buffer_test.cc
@@ -16,6 +16,7 @@
  *
  */
 
+#include <grpc/grpc.h>
 #include <grpc/slice_buffer.h>
 #include <grpc/support/log.h>
 #include "test/core/util/test_config.h"
@@ -106,9 +107,11 @@ void test_slice_buffer_move_first() {
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   test_slice_buffer_add();
   test_slice_buffer_move_first();
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/slice/slice_hash_table_test.cc b/test/core/slice/slice_hash_table_test.cc
index 0ee4e8617d..9fad9a614e 100644
--- a/test/core/slice/slice_hash_table_test.cc
+++ b/test/core/slice/slice_hash_table_test.cc
@@ -59,9 +59,7 @@ static void check_non_existent_value(const char* key_string,
   grpc_slice_unref(key);
 }
 
-static void destroy_string(grpc_exec_ctx* exec_ctx, void* value) {
-  gpr_free(value);
-}
+static void destroy_string(void* value) { gpr_free(value); }
 
 static grpc_slice_hash_table* create_table_from_entries(
     const test_entry* test_entries, size_t num_test_entries,
@@ -121,9 +119,8 @@ static void test_slice_hash_table() {
   check_values(test_entries, num_entries, table);
   check_non_existent_value("XX", table);
   // Clean up.
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_hash_table_unref(&exec_ctx, table);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_hash_table_unref(table);
 }
 
 static int value_cmp_fn(void* a, void* b) {
@@ -149,10 +146,9 @@ static void test_slice_hash_table_eq() {
       create_table_from_entries(test_entries_b, num_entries_b, value_cmp_fn);
 
   GPR_ASSERT(grpc_slice_hash_table_cmp(table_a, table_b) == 0);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_hash_table_unref(&exec_ctx, table_a);
-  grpc_slice_hash_table_unref(&exec_ctx, table_b);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_hash_table_unref(table_a);
+  grpc_slice_hash_table_unref(table_b);
 }
 
 static void test_slice_hash_table_not_eq() {
@@ -221,23 +217,24 @@ static void test_slice_hash_table_not_eq() {
       create_table_from_entries(test_entries_h, num_entries_h, pointer_cmp_fn);
   GPR_ASSERT(grpc_slice_hash_table_cmp(table_g, table_h) != 0);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_hash_table_unref(&exec_ctx, table_a);
-  grpc_slice_hash_table_unref(&exec_ctx, table_b_larger);
-  grpc_slice_hash_table_unref(&exec_ctx, table_b_smaller);
-  grpc_slice_hash_table_unref(&exec_ctx, table_c);
-  grpc_slice_hash_table_unref(&exec_ctx, table_d);
-  grpc_slice_hash_table_unref(&exec_ctx, table_e);
-  grpc_slice_hash_table_unref(&exec_ctx, table_f);
-  grpc_slice_hash_table_unref(&exec_ctx, table_g);
-  grpc_slice_hash_table_unref(&exec_ctx, table_h);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_hash_table_unref(table_a);
+  grpc_slice_hash_table_unref(table_b_larger);
+  grpc_slice_hash_table_unref(table_b_smaller);
+  grpc_slice_hash_table_unref(table_c);
+  grpc_slice_hash_table_unref(table_d);
+  grpc_slice_hash_table_unref(table_e);
+  grpc_slice_hash_table_unref(table_f);
+  grpc_slice_hash_table_unref(table_g);
+  grpc_slice_hash_table_unref(table_h);
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_core::ExecCtx::GlobalInit();
   test_slice_hash_table();
   test_slice_hash_table_eq();
   test_slice_hash_table_not_eq();
+  grpc_core::ExecCtx::GlobalShutdown();
   return 0;
 }
diff --git a/test/core/slice/slice_string_helpers_test.cc b/test/core/slice/slice_string_helpers_test.cc
index 260f8c80d5..f1d470461a 100644
--- a/test/core/slice/slice_string_helpers_test.cc
+++ b/test/core/slice/slice_string_helpers_test.cc
@@ -23,6 +23,7 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
@@ -130,7 +131,9 @@ static void test_strsplit(void) {
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_dump_slice();
   test_strsplit();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/slice/slice_test.cc b/test/core/slice/slice_test.cc
index 02f6b1ea79..e40154dd0e 100644
--- a/test/core/slice/slice_test.cc
+++ b/test/core/slice/slice_test.cc
@@ -292,6 +292,7 @@ static void test_static_slice_copy_interning(void) {
 int main(int argc, char** argv) {
   unsigned length;
   grpc_test_init(argc, argv);
+  grpc_init();
   test_slice_malloc_returns_something_sensible();
   test_slice_new_returns_something_sensible();
   test_slice_new_with_user_data();
@@ -305,5 +306,6 @@ int main(int argc, char** argv) {
   test_slice_interning();
   test_static_slice_interning();
   test_static_slice_copy_interning();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/support/arena_test.cc b/test/core/support/arena_test.cc
index 244d860639..ada0f43854 100644
--- a/test/core/support/arena_test.cc
+++ b/test/core/support/arena_test.cc
@@ -100,7 +100,8 @@ static void concurrent_test(void) {
   for (int i = 0; i < CONCURRENT_TEST_THREADS; i++) {
     gpr_thd_options opt = gpr_thd_options_default();
     gpr_thd_options_set_joinable(&opt);
-    gpr_thd_new(&thds[i], concurrent_test_body, &args, &opt);
+    gpr_thd_new(&thds[i], "grpc_concurrent_test", concurrent_test_body, &args,
+                &opt);
   }
 
   gpr_event_set(&args.ev_start, (void*)1);
diff --git a/test/core/support/cpu_test.cc b/test/core/support/cpu_test.cc
index 1783ec3c60..334c4318e1 100644
--- a/test/core/support/cpu_test.cc
+++ b/test/core/support/cpu_test.cc
@@ -110,11 +110,12 @@ static void cpu_test(void) {
   gpr_cv_init(&ct.done_cv);
   ct.is_done = 0;
   for (i = 0; i < ct.ncores * 3; i++) {
-    GPR_ASSERT(gpr_thd_new(&thd, &worker_thread, &ct, nullptr));
+    GPR_ASSERT(
+        gpr_thd_new(&thd, "grpc_cpu_test", &worker_thread, &ct, nullptr));
   }
   gpr_mu_lock(&ct.mu);
   while (!ct.is_done) {
-    gpr_cv_wait(&ct.done_cv, &ct.mu, gpr_inf_future(GPR_CLOCK_REALTIME));
+    gpr_cv_wait(&ct.done_cv, &ct.mu, gpr_inf_future(GPR_CLOCK_MONOTONIC));
   }
   gpr_mu_unlock(&ct.mu);
   fprintf(stderr, "Saw cores [");
diff --git a/test/core/support/mpscq_test.cc b/test/core/support/mpscq_test.cc
index 50ff8174f6..1b83f7d5be 100644
--- a/test/core/support/mpscq_test.cc
+++ b/test/core/support/mpscq_test.cc
@@ -85,7 +85,8 @@ static void test_mt(void) {
     ta[i].ctr = 0;
     ta[i].q = &q;
     ta[i].start = &start;
-    GPR_ASSERT(gpr_thd_new(&thds[i], test_thread, &ta[i], &options));
+    GPR_ASSERT(
+        gpr_thd_new(&thds[i], "grpc_mt_test", test_thread, &ta[i], &options));
   }
   size_t num_done = 0;
   size_t spins = 0;
@@ -156,7 +157,8 @@ static void test_mt_multipop(void) {
     ta[i].ctr = 0;
     ta[i].q = &q;
     ta[i].start = &start;
-    GPR_ASSERT(gpr_thd_new(&thds[i], test_thread, &ta[i], &options));
+    GPR_ASSERT(gpr_thd_new(&thds[i], "grpc_multipop_test", test_thread, &ta[i],
+                           &options));
   }
   pull_args pa;
   pa.ta = ta;
@@ -169,7 +171,8 @@ static void test_mt_multipop(void) {
   for (size_t i = 0; i < GPR_ARRAY_SIZE(pull_thds); i++) {
     gpr_thd_options options = gpr_thd_options_default();
     gpr_thd_options_set_joinable(&options);
-    GPR_ASSERT(gpr_thd_new(&pull_thds[i], pull_thread, &pa, &options));
+    GPR_ASSERT(gpr_thd_new(&pull_thds[i], "grpc_multipop_pull", pull_thread,
+                           &pa, &options));
   }
   gpr_event_set(&start, (void*)1);
   for (size_t i = 0; i < GPR_ARRAY_SIZE(pull_thds); i++) {
diff --git a/test/core/support/spinlock_test.cc b/test/core/support/spinlock_test.cc
index 3639802cd7..58d5fcd42b 100644
--- a/test/core/support/spinlock_test.cc
+++ b/test/core/support/spinlock_test.cc
@@ -67,7 +67,8 @@ static void test_create_threads(struct test* m, void (*body)(void* arg)) {
   for (i = 0; i != m->thread_count; i++) {
     gpr_thd_options opt = gpr_thd_options_default();
     gpr_thd_options_set_joinable(&opt);
-    GPR_ASSERT(gpr_thd_new(&m->threads[i], body, m, &opt));
+    GPR_ASSERT(
+        gpr_thd_new(&m->threads[i], "grpc_create_threads", body, m, &opt));
   }
 }
 
diff --git a/test/core/support/sync_test.cc b/test/core/support/sync_test.cc
index 86e78ce0b5..fb7ec44754 100644
--- a/test/core/support/sync_test.cc
+++ b/test/core/support/sync_test.cc
@@ -73,7 +73,7 @@ void queue_append(queue* q, int x) {
      corresponding condition variable.  The predicate must be on state
      protected by the lock.  */
   while (q->length == N) {
-    gpr_cv_wait(&q->non_full, &q->mu, gpr_inf_future(GPR_CLOCK_REALTIME));
+    gpr_cv_wait(&q->non_full, &q->mu, gpr_inf_future(GPR_CLOCK_MONOTONIC));
   }
   if (q->length == 0) { /* Wake threads blocked in queue_remove(). */
     /* It's normal to use gpr_cv_broadcast() or gpr_signal() while
@@ -189,7 +189,7 @@ static void test_create_threads(struct test* m, void (*body)(void* arg)) {
   gpr_thd_id id;
   int i;
   for (i = 0; i != m->threads; i++) {
-    GPR_ASSERT(gpr_thd_new(&id, body, m, nullptr));
+    GPR_ASSERT(gpr_thd_new(&id, "grpc_create_threads", body, m, nullptr));
   }
 }
 
@@ -197,7 +197,7 @@ static void test_create_threads(struct test* m, void (*body)(void* arg)) {
 static void test_wait(struct test* m) {
   gpr_mu_lock(&m->mu);
   while (m->done != 0) {
-    gpr_cv_wait(&m->done_cv, &m->mu, gpr_inf_future(GPR_CLOCK_REALTIME));
+    gpr_cv_wait(&m->done_cv, &m->mu, gpr_inf_future(GPR_CLOCK_MONOTONIC));
   }
   gpr_mu_unlock(&m->mu);
 }
@@ -244,7 +244,7 @@ static void test(const char* name, void (*body)(void* m),
     m = test_new(10, iterations, incr_step);
     if (extra != nullptr) {
       gpr_thd_id id;
-      GPR_ASSERT(gpr_thd_new(&id, extra, m, nullptr));
+      GPR_ASSERT(gpr_thd_new(&id, name, extra, m, nullptr));
       m->done++; /* one more thread to wait for */
     }
     test_create_threads(m, body);
@@ -297,7 +297,7 @@ static void inc_by_turns(void* v /*=m*/) {
   for (i = 0; i != m->iterations; i++) {
     gpr_mu_lock(&m->mu);
     while ((m->counter % m->threads) != id) {
-      gpr_cv_wait(&m->cv, &m->mu, gpr_inf_future(GPR_CLOCK_REALTIME));
+      gpr_cv_wait(&m->cv, &m->mu, gpr_inf_future(GPR_CLOCK_MONOTONIC));
     }
     m->counter++;
     gpr_cv_broadcast(&m->cv);
@@ -314,7 +314,7 @@ static void inc_with_1ms_delay(void* v /*=m*/) {
   for (i = 0; i != m->iterations; i++) {
     gpr_timespec deadline;
     gpr_mu_lock(&m->mu);
-    deadline = gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+    deadline = gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
                             gpr_time_from_micros(1000, GPR_TIMESPAN));
     while (!gpr_cv_wait(&m->cv, &m->mu, deadline)) {
     }
@@ -370,14 +370,14 @@ static void consumer(void* v /*=m*/) {
   int64_t i;
   int value;
   for (i = 0; i != n; i++) {
-    queue_remove(&m->q, &value, gpr_inf_future(GPR_CLOCK_REALTIME));
+    queue_remove(&m->q, &value, gpr_inf_future(GPR_CLOCK_MONOTONIC));
   }
   gpr_mu_lock(&m->mu);
   m->counter = n;
   gpr_mu_unlock(&m->mu);
   GPR_ASSERT(
       !queue_remove(&m->q, &value,
-                    gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+                    gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
                                  gpr_time_from_micros(1000000, GPR_TIMESPAN))));
   mark_thread_done(m);
 }
diff --git a/test/core/support/thd_test.cc b/test/core/support/thd_test.cc
index 34befd80d1..b755bf18f3 100644
--- a/test/core/support/thd_test.cc
+++ b/test/core/support/thd_test.cc
@@ -74,7 +74,7 @@ static void test(void) {
   t.n = NUM_THREADS;
   t.is_done = 0;
   for (i = 0; i < NUM_THREADS; i++) {
-    GPR_ASSERT(gpr_thd_new(&thd, &thd_body, &t, nullptr));
+    GPR_ASSERT(gpr_thd_new(&thd, "grpc_thread_test", &thd_body, &t, nullptr));
   }
   gpr_mu_lock(&t.mu);
   while (!t.is_done) {
@@ -84,7 +84,8 @@ static void test(void) {
   GPR_ASSERT(t.n == 0);
   gpr_thd_options_set_joinable(&options);
   for (i = 0; i < NUM_THREADS; i++) {
-    GPR_ASSERT(gpr_thd_new(&thds[i], &thd_body_joinable, nullptr, &options));
+    GPR_ASSERT(gpr_thd_new(&thds[i], "grpc_joinable_thread_test",
+                           &thd_body_joinable, nullptr, &options));
   }
   for (i = 0; i < NUM_THREADS; i++) {
     gpr_thd_join(thds[i]);
diff --git a/test/core/support/tls_test.cc b/test/core/support/tls_test.cc
index 0f64d2ee7c..743b10f090 100644
--- a/test/core/support/tls_test.cc
+++ b/test/core/support/tls_test.cc
@@ -56,7 +56,7 @@ int main(int argc, char* argv[]) {
   gpr_thd_options_set_joinable(&opt);
 
   for (i = 0; i < NUM_THREADS; i++) {
-    gpr_thd_new(&threads[i], thd_body, nullptr, &opt);
+    gpr_thd_new(&threads[i], "grpc_tls_test", thd_body, nullptr, &opt);
   }
   for (i = 0; i < NUM_THREADS; i++) {
     gpr_thd_join(threads[i]);
diff --git a/test/core/surface/byte_buffer_reader_test.cc b/test/core/surface/byte_buffer_reader_test.cc
index e5d2d7c78d..94a8615b3c 100644
--- a/test/core/surface/byte_buffer_reader_test.cc
+++ b/test/core/surface/byte_buffer_reader_test.cc
@@ -132,10 +132,8 @@ static void read_compressed_slice(grpc_compression_algorithm algorithm,
   memset(GRPC_SLICE_START_PTR(input_slice), 'a', input_size);
   grpc_slice_buffer_add(&sliceb_in, input_slice); /* takes ownership */
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GPR_ASSERT(
-        grpc_msg_compress(&exec_ctx, algorithm, &sliceb_in, &sliceb_out));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    GPR_ASSERT(grpc_msg_compress(algorithm, &sliceb_in, &sliceb_out));
   }
 
   buffer = grpc_raw_compressed_byte_buffer_create(sliceb_out.slices,
@@ -267,6 +265,7 @@ static void test_byte_buffer_copy(void) {
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_read_one_slice();
   test_read_one_slice_malloc();
   test_read_none_compressed_slice();
@@ -276,5 +275,6 @@ int main(int argc, char** argv) {
   test_byte_buffer_from_reader();
   test_byte_buffer_copy();
   test_readall();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/surface/channel_create_test.cc b/test/core/surface/channel_create_test.cc
index f358b0fc8d..37247f89d0 100644
--- a/test/core/surface/channel_create_test.cc
+++ b/test/core/surface/channel_create_test.cc
@@ -35,11 +35,10 @@ void test_unknown_scheme_target(void) {
   chan = grpc_insecure_channel_create("blah://blah", nullptr, nullptr);
   GPR_ASSERT(chan != nullptr);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_element* elem =
       grpc_channel_stack_element(grpc_channel_get_channel_stack(chan), 0);
   GPR_ASSERT(0 == strcmp(elem->filter->name, "lame-client"));
-  grpc_exec_ctx_finish(&exec_ctx);
 
   grpc_channel_destroy(chan);
 }
diff --git a/test/core/surface/completion_queue_test.cc b/test/core/surface/completion_queue_test.cc
index c6e13d2386..fefbb3c185 100644
--- a/test/core/surface/completion_queue_test.cc
+++ b/test/core/surface/completion_queue_test.cc
@@ -121,8 +121,7 @@ static void test_wait_empty(void) {
   }
 }
 
-static void do_nothing_end_completion(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_cq_completion* c) {}
+static void do_nothing_end_completion(void* arg, grpc_cq_completion* c) {}
 
 static void test_cq_end_op(void) {
   grpc_event ev;
@@ -131,8 +130,6 @@ static void test_cq_end_op(void) {
   grpc_cq_polling_type polling_types[] = {
       GRPC_CQ_DEFAULT_POLLING, GRPC_CQ_NON_LISTENING, GRPC_CQ_NON_POLLING};
   grpc_completion_queue_attributes attr;
-  grpc_exec_ctx init_exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_exec_ctx exec_ctx;
   void* tag = create_test_tag();
 
   LOG_TEST("test_cq_end_op");
@@ -140,14 +137,14 @@ static void test_cq_end_op(void) {
   attr.version = 1;
   attr.cq_completion_type = GRPC_CQ_NEXT;
   for (size_t i = 0; i < GPR_ARRAY_SIZE(polling_types); i++) {
-    exec_ctx = init_exec_ctx;  // Reset exec_ctx
+    grpc_core::ExecCtx exec_ctx;
     attr.cq_polling_type = polling_types[i];
     cc = grpc_completion_queue_create(
         grpc_completion_queue_factory_lookup(&attr), &attr, nullptr);
 
     GPR_ASSERT(grpc_cq_begin_op(cc, tag));
-    grpc_cq_end_op(&exec_ctx, cc, tag, GRPC_ERROR_NONE,
-                   do_nothing_end_completion, nullptr, &completion);
+    grpc_cq_end_op(cc, tag, GRPC_ERROR_NONE, do_nothing_end_completion, nullptr,
+                   &completion);
 
     ev = grpc_completion_queue_next(cc, gpr_inf_past(GPR_CLOCK_REALTIME),
                                     nullptr);
@@ -156,7 +153,6 @@ static void test_cq_end_op(void) {
     GPR_ASSERT(ev.success);
 
     shutdown_and_destroy(cc);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 }
 
@@ -167,8 +163,6 @@ static void test_cq_tls_cache_full(void) {
   grpc_cq_polling_type polling_types[] = {
       GRPC_CQ_DEFAULT_POLLING, GRPC_CQ_NON_LISTENING, GRPC_CQ_NON_POLLING};
   grpc_completion_queue_attributes attr;
-  grpc_exec_ctx init_exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_exec_ctx exec_ctx;
   void* tag = create_test_tag();
   void* res_tag;
   int ok;
@@ -178,15 +172,15 @@ static void test_cq_tls_cache_full(void) {
   attr.version = 1;
   attr.cq_completion_type = GRPC_CQ_NEXT;
   for (size_t i = 0; i < GPR_ARRAY_SIZE(polling_types); i++) {
-    exec_ctx = init_exec_ctx;  // Reset exec_ctx
+    grpc_core::ExecCtx exec_ctx;  // Reset exec_ctx
     attr.cq_polling_type = polling_types[i];
     cc = grpc_completion_queue_create(
         grpc_completion_queue_factory_lookup(&attr), &attr, nullptr);
 
     grpc_completion_queue_thread_local_cache_init(cc);
     GPR_ASSERT(grpc_cq_begin_op(cc, tag));
-    grpc_cq_end_op(&exec_ctx, cc, tag, GRPC_ERROR_NONE,
-                   do_nothing_end_completion, nullptr, &completion);
+    grpc_cq_end_op(cc, tag, GRPC_ERROR_NONE, do_nothing_end_completion, nullptr,
+                   &completion);
 
     ev = grpc_completion_queue_next(cc, gpr_inf_past(GPR_CLOCK_REALTIME),
                                     nullptr);
@@ -202,7 +196,6 @@ static void test_cq_tls_cache_full(void) {
     GPR_ASSERT(ev.type == GRPC_QUEUE_TIMEOUT);
 
     shutdown_and_destroy(cc);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 }
 
@@ -211,8 +204,6 @@ static void test_cq_tls_cache_empty(void) {
   grpc_cq_polling_type polling_types[] = {
       GRPC_CQ_DEFAULT_POLLING, GRPC_CQ_NON_LISTENING, GRPC_CQ_NON_POLLING};
   grpc_completion_queue_attributes attr;
-  grpc_exec_ctx init_exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_exec_ctx exec_ctx;
   void* res_tag;
   int ok;
 
@@ -221,7 +212,7 @@ static void test_cq_tls_cache_empty(void) {
   attr.version = 1;
   attr.cq_completion_type = GRPC_CQ_NEXT;
   for (size_t i = 0; i < GPR_ARRAY_SIZE(polling_types); i++) {
-    exec_ctx = init_exec_ctx;  // Reset exec_ctx
+    grpc_core::ExecCtx exec_ctx;  // Reset exec_ctx
     attr.cq_polling_type = polling_types[i];
     cc = grpc_completion_queue_create(
         grpc_completion_queue_factory_lookup(&attr), &attr, nullptr);
@@ -232,7 +223,6 @@ static void test_cq_tls_cache_empty(void) {
     GPR_ASSERT(
         grpc_completion_queue_thread_local_cache_flush(cc, &res_tag, &ok) == 0);
     shutdown_and_destroy(cc);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 }
 
@@ -289,8 +279,6 @@ static void test_pluck(void) {
   grpc_cq_polling_type polling_types[] = {
       GRPC_CQ_DEFAULT_POLLING, GRPC_CQ_NON_LISTENING, GRPC_CQ_NON_POLLING};
   grpc_completion_queue_attributes attr;
-  grpc_exec_ctx init_exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_exec_ctx exec_ctx;
   unsigned i, j;
 
   LOG_TEST("test_pluck");
@@ -305,15 +293,15 @@ static void test_pluck(void) {
   attr.version = 1;
   attr.cq_completion_type = GRPC_CQ_PLUCK;
   for (size_t pidx = 0; pidx < GPR_ARRAY_SIZE(polling_types); pidx++) {
-    exec_ctx = init_exec_ctx;  // reset exec_ctx
+    grpc_core::ExecCtx exec_ctx;  // reset exec_ctx
     attr.cq_polling_type = polling_types[pidx];
     cc = grpc_completion_queue_create(
         grpc_completion_queue_factory_lookup(&attr), &attr, nullptr);
 
     for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
       GPR_ASSERT(grpc_cq_begin_op(cc, tags[i]));
-      grpc_cq_end_op(&exec_ctx, cc, tags[i], GRPC_ERROR_NONE,
-                     do_nothing_end_completion, nullptr, &completions[i]);
+      grpc_cq_end_op(cc, tags[i], GRPC_ERROR_NONE, do_nothing_end_completion,
+                     nullptr, &completions[i]);
     }
 
     for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
@@ -324,8 +312,8 @@ static void test_pluck(void) {
 
     for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
       GPR_ASSERT(grpc_cq_begin_op(cc, tags[i]));
-      grpc_cq_end_op(&exec_ctx, cc, tags[i], GRPC_ERROR_NONE,
-                     do_nothing_end_completion, nullptr, &completions[i]);
+      grpc_cq_end_op(cc, tags[i], GRPC_ERROR_NONE, do_nothing_end_completion,
+                     nullptr, &completions[i]);
     }
 
     for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
@@ -336,7 +324,6 @@ static void test_pluck(void) {
     }
 
     shutdown_and_destroy(cc);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 }
 
diff --git a/test/core/surface/completion_queue_threading_test.cc b/test/core/surface/completion_queue_threading_test.cc
index af54e00c4a..4a9e818b45 100644
--- a/test/core/surface/completion_queue_threading_test.cc
+++ b/test/core/surface/completion_queue_threading_test.cc
@@ -59,8 +59,7 @@ static void shutdown_and_destroy(grpc_completion_queue* cc) {
   grpc_completion_queue_destroy(cc);
 }
 
-static void do_nothing_end_completion(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_cq_completion* c) {}
+static void do_nothing_end_completion(void* arg, grpc_cq_completion* c) {}
 
 struct thread_state {
   grpc_completion_queue* cc;
@@ -81,7 +80,7 @@ static void test_too_many_plucks(void) {
   gpr_thd_id thread_ids[GPR_ARRAY_SIZE(tags)];
   struct thread_state thread_states[GPR_ARRAY_SIZE(tags)];
   gpr_thd_options thread_options = gpr_thd_options_default();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   unsigned i, j;
 
   LOG_TEST("test_too_many_plucks");
@@ -96,7 +95,8 @@ static void test_too_many_plucks(void) {
     }
     thread_states[i].cc = cc;
     thread_states[i].tag = tags[i];
-    gpr_thd_new(thread_ids + i, pluck_one, thread_states + i, &thread_options);
+    gpr_thd_new(thread_ids + i, "grpc_pluck_test", pluck_one, thread_states + i,
+                &thread_options);
   }
 
   /* wait until all other threads are plucking */
@@ -108,8 +108,8 @@ static void test_too_many_plucks(void) {
 
   for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
     GPR_ASSERT(grpc_cq_begin_op(cc, tags[i]));
-    grpc_cq_end_op(&exec_ctx, cc, tags[i], GRPC_ERROR_NONE,
-                   do_nothing_end_completion, nullptr, &completions[i]);
+    grpc_cq_end_op(cc, tags[i], GRPC_ERROR_NONE, do_nothing_end_completion,
+                   nullptr, &completions[i]);
   }
 
   for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
@@ -117,7 +117,6 @@ static void test_too_many_plucks(void) {
   }
 
   shutdown_and_destroy(cc);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 #define TEST_THREAD_EVENTS 10000
@@ -137,15 +136,13 @@ gpr_timespec ten_seconds_time(void) {
   return grpc_timeout_seconds_to_deadline(10);
 }
 
-static void free_completion(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_cq_completion* completion) {
+static void free_completion(void* arg, grpc_cq_completion* completion) {
   gpr_free(completion);
 }
 
 static void producer_thread(void* arg) {
   test_thread_options* opt = static_cast<test_thread_options*>(arg);
   int i;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   gpr_log(GPR_INFO, "producer %d started", opt->id);
   gpr_event_set(&opt->on_started, (void*)(intptr_t)1);
@@ -162,17 +159,16 @@ static void producer_thread(void* arg) {
 
   gpr_log(GPR_INFO, "producer %d phase 2", opt->id);
   for (i = 0; i < TEST_THREAD_EVENTS; i++) {
-    grpc_cq_end_op(&exec_ctx, opt->cc, (void*)(intptr_t)1, GRPC_ERROR_NONE,
+    grpc_core::ExecCtx exec_ctx;
+    grpc_cq_end_op(opt->cc, (void*)(intptr_t)1, GRPC_ERROR_NONE,
                    free_completion, nullptr,
                    static_cast<grpc_cq_completion*>(
                        gpr_malloc(sizeof(grpc_cq_completion))));
     opt->events_triggered++;
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 
   gpr_log(GPR_INFO, "producer %d phase 2 done", opt->id);
   gpr_event_set(&opt->on_finished, (void*)(intptr_t)1);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void consumer_thread(void* arg) {
@@ -234,6 +230,7 @@ static void test_threading(size_t producers, size_t consumers) {
     options[i].cc = cc;
     options[i].id = optid++;
     GPR_ASSERT(gpr_thd_new(&id,
+                           i < producers ? "grpc_producer" : "grpc_consumer",
                            i < producers ? producer_thread : consumer_thread,
                            options + i, nullptr));
     gpr_event_wait(&options[i].on_started, ten_seconds_time());
diff --git a/test/core/surface/concurrent_connectivity_test.cc b/test/core/surface/concurrent_connectivity_test.cc
index c7611b0dd1..235d136376 100644
--- a/test/core/surface/concurrent_connectivity_test.cc
+++ b/test/core/surface/concurrent_connectivity_test.cc
@@ -103,29 +103,28 @@ void server_thread(void* vargs) {
   GPR_ASSERT(detag(ev.tag) == 0xd1e);
 }
 
-static void on_connect(grpc_exec_ctx* exec_ctx, void* vargs, grpc_endpoint* tcp,
+static void on_connect(void* vargs, grpc_endpoint* tcp,
                        grpc_pollset* accepting_pollset,
                        grpc_tcp_server_acceptor* acceptor) {
   gpr_free(acceptor);
   struct server_thread_args* args = (struct server_thread_args*)vargs;
-  grpc_endpoint_shutdown(exec_ctx, tcp,
+  grpc_endpoint_shutdown(tcp,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Connected"));
-  grpc_endpoint_destroy(exec_ctx, tcp);
+  grpc_endpoint_destroy(tcp);
   gpr_mu_lock(args->mu);
-  GRPC_LOG_IF_ERROR("pollset_kick",
-                    grpc_pollset_kick(exec_ctx, args->pollset, nullptr));
+  GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(args->pollset, nullptr));
   gpr_mu_unlock(args->mu);
 }
 
 void bad_server_thread(void* vargs) {
   struct server_thread_args* args = (struct server_thread_args*)vargs;
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_storage* addr = (struct sockaddr_storage*)resolved_addr.addr;
   int port;
   grpc_tcp_server* s;
-  grpc_error* error = grpc_tcp_server_create(&exec_ctx, nullptr, nullptr, &s);
+  grpc_error* error = grpc_tcp_server_create(nullptr, nullptr, &s);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   memset(&resolved_addr, 0, sizeof(resolved_addr));
   addr->ss_family = AF_INET;
@@ -134,35 +133,32 @@ void bad_server_thread(void* vargs) {
   GPR_ASSERT(port > 0);
   gpr_asprintf(&args->addr, "localhost:%d", port);
 
-  grpc_tcp_server_start(&exec_ctx, s, &args->pollset, 1, on_connect, args);
+  grpc_tcp_server_start(s, &args->pollset, 1, on_connect, args);
   gpr_event_set(&args->ready, (void*)1);
 
   gpr_mu_lock(args->mu);
   while (gpr_atm_acq_load(&args->stop) == 0) {
-    grpc_millis deadline = grpc_exec_ctx_now(&exec_ctx) + 100;
+    grpc_millis deadline = grpc_core::ExecCtx::Get()->Now() + 100;
 
     grpc_pollset_worker* worker = nullptr;
     if (!GRPC_LOG_IF_ERROR(
             "pollset_work",
-            grpc_pollset_work(&exec_ctx, args->pollset, &worker, deadline))) {
+            grpc_pollset_work(args->pollset, &worker, deadline))) {
       gpr_atm_rel_store(&args->stop, 1);
     }
     gpr_mu_unlock(args->mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(args->mu);
   }
   gpr_mu_unlock(args->mu);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
 
   gpr_free(args->addr);
 }
 
-static void done_pollset_shutdown(grpc_exec_ctx* exec_ctx, void* pollset,
-                                  grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(pollset));
+static void done_pollset_shutdown(void* pollset, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(pollset));
   gpr_free(pollset);
 }
 
@@ -182,7 +178,8 @@ int run_concurrent_connectivity_test() {
   /* First round, no server */
   gpr_log(GPR_DEBUG, "Wave 1");
   for (size_t i = 0; i < NUM_THREADS; ++i) {
-    gpr_thd_new(&threads[i], create_loop_destroy, localhost, &options);
+    gpr_thd_new(&threads[i], "grpc_wave_1", create_loop_destroy, localhost,
+                &options);
   }
   for (size_t i = 0; i < NUM_THREADS; ++i) {
     gpr_thd_join(threads[i]);
@@ -198,10 +195,11 @@ int run_concurrent_connectivity_test() {
   args.cq = grpc_completion_queue_create_for_next(nullptr);
   grpc_server_register_completion_queue(args.server, args.cq, nullptr);
   grpc_server_start(args.server);
-  gpr_thd_new(&server, server_thread, &args, &options);
+  gpr_thd_new(&server, "grpc_wave_2_server", server_thread, &args, &options);
 
   for (size_t i = 0; i < NUM_THREADS; ++i) {
-    gpr_thd_new(&threads[i], create_loop_destroy, args.addr, &options);
+    gpr_thd_new(&threads[i], "grpc_wave_2", create_loop_destroy, args.addr,
+                &options);
   }
   for (size_t i = 0; i < NUM_THREADS; ++i) {
     gpr_thd_join(threads[i]);
@@ -218,11 +216,13 @@ int run_concurrent_connectivity_test() {
   args.pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(args.pollset, &args.mu);
   gpr_event_init(&args.ready);
-  gpr_thd_new(&server, bad_server_thread, &args, &options);
+  gpr_thd_new(&server, "grpc_wave_3_server", bad_server_thread, &args,
+              &options);
   gpr_event_wait(&args.ready, gpr_inf_future(GPR_CLOCK_MONOTONIC));
 
   for (size_t i = 0; i < NUM_THREADS; ++i) {
-    gpr_thd_new(&threads[i], create_loop_destroy, args.addr, &options);
+    gpr_thd_new(&threads[i], "grpc_wave_3", create_loop_destroy, args.addr,
+                &options);
   }
   for (size_t i = 0; i < NUM_THREADS; ++i) {
     gpr_thd_join(threads[i]);
@@ -230,11 +230,12 @@ int run_concurrent_connectivity_test() {
 
   gpr_atm_rel_store(&args.stop, 1);
   gpr_thd_join(server);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_pollset_shutdown(&exec_ctx, args.pollset,
-                        GRPC_CLOSURE_CREATE(done_pollset_shutdown, args.pollset,
-                                            grpc_schedule_on_exec_ctx));
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_pollset_shutdown(
+        args.pollset, GRPC_CLOSURE_CREATE(done_pollset_shutdown, args.pollset,
+                                          grpc_schedule_on_exec_ctx));
+  }
 
   grpc_shutdown();
   return 0;
@@ -280,7 +281,8 @@ int run_concurrent_watches_with_short_timeouts_test() {
   gpr_thd_options_set_joinable(&options);
 
   for (size_t i = 0; i < NUM_THREADS; ++i) {
-    gpr_thd_new(&threads[i], watches_with_short_timeouts, localhost, &options);
+    gpr_thd_new(&threads[i], "grpc_short_watches", watches_with_short_timeouts,
+                localhost, &options);
   }
   for (size_t i = 0; i < NUM_THREADS; ++i) {
     gpr_thd_join(threads[i]);
diff --git a/test/core/surface/lame_client_test.cc b/test/core/surface/lame_client_test.cc
index f3df7f35a7..4bf40569e6 100644
--- a/test/core/surface/lame_client_test.cc
+++ b/test/core/surface/lame_client_test.cc
@@ -32,20 +32,19 @@ grpc_closure transport_op_cb;
 
 static void* tag(intptr_t x) { return (void*)x; }
 
-void verify_connectivity(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
+void verify_connectivity(void* arg, grpc_error* error) {
   grpc_connectivity_state* state = static_cast<grpc_connectivity_state*>(arg);
   GPR_ASSERT(GRPC_CHANNEL_SHUTDOWN == *state);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
 }
 
-void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+void do_nothing(void* arg, grpc_error* error) {}
 
 void test_transport_op(grpc_channel* channel) {
   grpc_transport_op* op;
   grpc_channel_element* elem;
   grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_CLOSURE_INIT(&transport_op_cb, verify_connectivity, &state,
                     grpc_schedule_on_exec_ctx);
@@ -54,14 +53,12 @@ void test_transport_op(grpc_channel* channel) {
   op->on_connectivity_state_change = &transport_op_cb;
   op->connectivity_state = &state;
   elem = grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0);
-  elem->filter->start_transport_op(&exec_ctx, elem, op);
-  grpc_exec_ctx_finish(&exec_ctx);
+  elem->filter->start_transport_op(elem, op);
 
   GRPC_CLOSURE_INIT(&transport_op_cb, do_nothing, nullptr,
                     grpc_schedule_on_exec_ctx);
   op = grpc_make_transport_op(&transport_op_cb);
-  elem->filter->start_transport_op(&exec_ctx, elem, op);
-  grpc_exec_ctx_finish(&exec_ctx);
+  elem->filter->start_transport_op(elem, op);
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/surface/num_external_connectivity_watchers_test.cc b/test/core/surface/num_external_connectivity_watchers_test.cc
index f78d333673..9cdd299ae3 100644
--- a/test/core/surface/num_external_connectivity_watchers_test.cc
+++ b/test/core/surface/num_external_connectivity_watchers_test.cc
@@ -178,9 +178,8 @@ static grpc_channel* secure_test_create_channel(const char* addr) {
   grpc_channel* channel =
       grpc_secure_channel_create(ssl_creds, addr, new_client_args, nullptr);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, new_client_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(new_client_args);
   }
   grpc_channel_credentials_release(ssl_creds);
   return channel;
diff --git a/test/core/surface/secure_channel_create_test.cc b/test/core/surface/secure_channel_create_test.cc
index c31c61430c..fa22cd6873 100644
--- a/test/core/surface/secure_channel_create_test.cc
+++ b/test/core/surface/secure_channel_create_test.cc
@@ -37,10 +37,9 @@ void test_unknown_scheme_target(void) {
   grpc_channel_element* elem =
       grpc_channel_stack_element(grpc_channel_get_channel_stack(chan), 0);
   GPR_ASSERT(0 == strcmp(elem->filter->name, "lame-client"));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_CHANNEL_INTERNAL_UNREF(&exec_ctx, chan, "test");
-  grpc_channel_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_CHANNEL_INTERNAL_UNREF(chan, "test");
+  grpc_channel_credentials_unref(creds);
 }
 
 void test_security_connector_already_in_arg(void) {
@@ -56,9 +55,8 @@ void test_security_connector_already_in_arg(void) {
   grpc_channel_element* elem =
       grpc_channel_stack_element(grpc_channel_get_channel_stack(chan), 0);
   GPR_ASSERT(0 == strcmp(elem->filter->name, "lame-client"));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_CHANNEL_INTERNAL_UNREF(&exec_ctx, chan, "test");
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_CHANNEL_INTERNAL_UNREF(chan, "test");
 }
 
 void test_null_creds(void) {
@@ -67,9 +65,8 @@ void test_null_creds(void) {
   grpc_channel_element* elem =
       grpc_channel_stack_element(grpc_channel_get_channel_stack(chan), 0);
   GPR_ASSERT(0 == strcmp(elem->filter->name, "lame-client"));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_CHANNEL_INTERNAL_UNREF(&exec_ctx, chan, "test");
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_CHANNEL_INTERNAL_UNREF(chan, "test");
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/surface/sequential_connectivity_test.cc b/test/core/surface/sequential_connectivity_test.cc
index 015db92cb0..ac49bd9823 100644
--- a/test/core/surface/sequential_connectivity_test.cc
+++ b/test/core/surface/sequential_connectivity_test.cc
@@ -70,7 +70,7 @@ static void run_test(const test_fixture* fixture) {
   gpr_thd_id server_thread;
   gpr_thd_options thdopt = gpr_thd_options_default();
   gpr_thd_options_set_joinable(&thdopt);
-  gpr_thd_new(&server_thread, server_thread_func, &sta, &thdopt);
+  gpr_thd_new(&server_thread, "grpc_server", server_thread_func, &sta, &thdopt);
 
   grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
   grpc_channel* channels[NUM_CONNECTIONS];
@@ -156,9 +156,8 @@ static grpc_channel* secure_test_create_channel(const char* addr) {
   grpc_channel* channel =
       grpc_secure_channel_create(ssl_creds, addr, new_client_args, nullptr);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, new_client_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(new_client_args);
   }
   grpc_channel_credentials_release(ssl_creds);
   return channel;
diff --git a/test/core/transport/bdp_estimator_test.cc b/test/core/transport/bdp_estimator_test.cc
index d1272607f2..445823b628 100644
--- a/test/core/transport/bdp_estimator_test.cc
+++ b/test/core/transport/bdp_estimator_test.cc
@@ -58,7 +58,7 @@ namespace {
 void AddSamples(BdpEstimator* estimator, int64_t* samples, size_t n) {
   estimator->AddIncomingBytes(1234567);
   inc_time();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   estimator->SchedulePing();
   estimator->StartPing();
   for (size_t i = 0; i < n; i++) {
@@ -66,9 +66,8 @@ void AddSamples(BdpEstimator* estimator, int64_t* samples, size_t n) {
   }
   gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
                                gpr_time_from_millis(1, GPR_TIMESPAN)));
-  grpc_exec_ctx_invalidate_now(&exec_ctx);
-  estimator->CompletePing(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->InvalidateNow();
+  estimator->CompletePing();
 }
 
 void AddSample(BdpEstimator* estimator, int64_t sample) {
diff --git a/test/core/transport/byte_stream_test.cc b/test/core/transport/byte_stream_test.cc
index 0e34fd7651..2aab6e9262 100644
--- a/test/core/transport/byte_stream_test.cc
+++ b/test/core/transport/byte_stream_test.cc
@@ -18,6 +18,7 @@
 
 #include "src/core/lib/transport/byte_stream.h"
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
@@ -30,14 +31,13 @@
 // grpc_slice_buffer_stream tests
 //
 
-static void not_called_closure(grpc_exec_ctx* exec_ctx, void* arg,
-                               grpc_error* error) {
+static void not_called_closure(void* arg, grpc_error* error) {
   GPR_ASSERT(false);
 }
 
 static void test_slice_buffer_stream_basic(void) {
   gpr_log(GPR_DEBUG, "test_slice_buffer_stream_basic");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   // Create and populate slice buffer.
   grpc_slice_buffer buffer;
   grpc_slice_buffer_init(&buffer);
@@ -57,23 +57,21 @@ static void test_slice_buffer_stream_basic(void) {
                     grpc_schedule_on_exec_ctx);
   // Read each slice.  Note that next() always returns synchronously.
   for (size_t i = 0; i < GPR_ARRAY_SIZE(input); ++i) {
-    GPR_ASSERT(
-        grpc_byte_stream_next(&exec_ctx, &stream.base, ~(size_t)0, &closure));
+    GPR_ASSERT(grpc_byte_stream_next(&stream.base, ~(size_t)0, &closure));
     grpc_slice output;
-    grpc_error* error = grpc_byte_stream_pull(&exec_ctx, &stream.base, &output);
+    grpc_error* error = grpc_byte_stream_pull(&stream.base, &output);
     GPR_ASSERT(error == GRPC_ERROR_NONE);
     GPR_ASSERT(grpc_slice_eq(input[i], output));
-    grpc_slice_unref_internal(&exec_ctx, output);
+    grpc_slice_unref_internal(output);
   }
   // Clean up.
-  grpc_byte_stream_destroy(&exec_ctx, &stream.base);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_byte_stream_destroy(&stream.base);
+  grpc_slice_buffer_destroy_internal(&buffer);
 }
 
 static void test_slice_buffer_stream_shutdown(void) {
   gpr_log(GPR_DEBUG, "test_slice_buffer_stream_shutdown");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   // Create and populate slice buffer.
   grpc_slice_buffer buffer;
   grpc_slice_buffer_init(&buffer);
@@ -92,29 +90,25 @@ static void test_slice_buffer_stream_shutdown(void) {
   GRPC_CLOSURE_INIT(&closure, not_called_closure, nullptr,
                     grpc_schedule_on_exec_ctx);
   // Read the first slice.
-  GPR_ASSERT(
-      grpc_byte_stream_next(&exec_ctx, &stream.base, ~(size_t)0, &closure));
+  GPR_ASSERT(grpc_byte_stream_next(&stream.base, ~(size_t)0, &closure));
   grpc_slice output;
-  grpc_error* error = grpc_byte_stream_pull(&exec_ctx, &stream.base, &output);
+  grpc_error* error = grpc_byte_stream_pull(&stream.base, &output);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(grpc_slice_eq(input[0], output));
-  grpc_slice_unref_internal(&exec_ctx, output);
+  grpc_slice_unref_internal(output);
   // Now shutdown.
   grpc_error* shutdown_error =
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("shutdown error");
-  grpc_byte_stream_shutdown(&exec_ctx, &stream.base,
-                            GRPC_ERROR_REF(shutdown_error));
+  grpc_byte_stream_shutdown(&stream.base, GRPC_ERROR_REF(shutdown_error));
   // After shutdown, the next pull() should return the error.
-  GPR_ASSERT(
-      grpc_byte_stream_next(&exec_ctx, &stream.base, ~(size_t)0, &closure));
-  error = grpc_byte_stream_pull(&exec_ctx, &stream.base, &output);
+  GPR_ASSERT(grpc_byte_stream_next(&stream.base, ~(size_t)0, &closure));
+  error = grpc_byte_stream_pull(&stream.base, &output);
   GPR_ASSERT(error == shutdown_error);
   GRPC_ERROR_UNREF(error);
   GRPC_ERROR_UNREF(shutdown_error);
   // Clean up.
-  grpc_byte_stream_destroy(&exec_ctx, &stream.base);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_byte_stream_destroy(&stream.base);
+  grpc_slice_buffer_destroy_internal(&buffer);
 }
 
 //
@@ -123,7 +117,7 @@ static void test_slice_buffer_stream_shutdown(void) {
 
 static void test_caching_byte_stream_basic(void) {
   gpr_log(GPR_DEBUG, "test_caching_byte_stream_basic");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   // Create and populate slice buffer byte stream.
   grpc_slice_buffer buffer;
   grpc_slice_buffer_init(&buffer);
@@ -147,24 +141,22 @@ static void test_caching_byte_stream_basic(void) {
   // Read each slice.  Note that next() always returns synchronously,
   // because the underlying byte stream always does.
   for (size_t i = 0; i < GPR_ARRAY_SIZE(input); ++i) {
-    GPR_ASSERT(
-        grpc_byte_stream_next(&exec_ctx, &stream.base, ~(size_t)0, &closure));
+    GPR_ASSERT(grpc_byte_stream_next(&stream.base, ~(size_t)0, &closure));
     grpc_slice output;
-    grpc_error* error = grpc_byte_stream_pull(&exec_ctx, &stream.base, &output);
+    grpc_error* error = grpc_byte_stream_pull(&stream.base, &output);
     GPR_ASSERT(error == GRPC_ERROR_NONE);
     GPR_ASSERT(grpc_slice_eq(input[i], output));
-    grpc_slice_unref_internal(&exec_ctx, output);
+    grpc_slice_unref_internal(output);
   }
   // Clean up.
-  grpc_byte_stream_destroy(&exec_ctx, &stream.base);
-  grpc_byte_stream_cache_destroy(&exec_ctx, &cache);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_byte_stream_destroy(&stream.base);
+  grpc_byte_stream_cache_destroy(&cache);
+  grpc_slice_buffer_destroy_internal(&buffer);
 }
 
 static void test_caching_byte_stream_reset(void) {
   gpr_log(GPR_DEBUG, "test_caching_byte_stream_reset");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   // Create and populate slice buffer byte stream.
   grpc_slice_buffer buffer;
   grpc_slice_buffer_init(&buffer);
@@ -186,34 +178,31 @@ static void test_caching_byte_stream_reset(void) {
   GRPC_CLOSURE_INIT(&closure, not_called_closure, nullptr,
                     grpc_schedule_on_exec_ctx);
   // Read one slice.
-  GPR_ASSERT(
-      grpc_byte_stream_next(&exec_ctx, &stream.base, ~(size_t)0, &closure));
+  GPR_ASSERT(grpc_byte_stream_next(&stream.base, ~(size_t)0, &closure));
   grpc_slice output;
-  grpc_error* error = grpc_byte_stream_pull(&exec_ctx, &stream.base, &output);
+  grpc_error* error = grpc_byte_stream_pull(&stream.base, &output);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(grpc_slice_eq(input[0], output));
-  grpc_slice_unref_internal(&exec_ctx, output);
+  grpc_slice_unref_internal(output);
   // Reset the caching stream.  The reads should start over from the
   // first slice.
   grpc_caching_byte_stream_reset(&stream);
   for (size_t i = 0; i < GPR_ARRAY_SIZE(input); ++i) {
-    GPR_ASSERT(
-        grpc_byte_stream_next(&exec_ctx, &stream.base, ~(size_t)0, &closure));
-    error = grpc_byte_stream_pull(&exec_ctx, &stream.base, &output);
+    GPR_ASSERT(grpc_byte_stream_next(&stream.base, ~(size_t)0, &closure));
+    error = grpc_byte_stream_pull(&stream.base, &output);
     GPR_ASSERT(error == GRPC_ERROR_NONE);
     GPR_ASSERT(grpc_slice_eq(input[i], output));
-    grpc_slice_unref_internal(&exec_ctx, output);
+    grpc_slice_unref_internal(output);
   }
   // Clean up.
-  grpc_byte_stream_destroy(&exec_ctx, &stream.base);
-  grpc_byte_stream_cache_destroy(&exec_ctx, &cache);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_byte_stream_destroy(&stream.base);
+  grpc_byte_stream_cache_destroy(&cache);
+  grpc_slice_buffer_destroy_internal(&buffer);
 }
 
 static void test_caching_byte_stream_shared_cache(void) {
   gpr_log(GPR_DEBUG, "test_caching_byte_stream_shared_cache");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   // Create and populate slice buffer byte stream.
   grpc_slice_buffer buffer;
   grpc_slice_buffer_init(&buffer);
@@ -237,43 +226,41 @@ static void test_caching_byte_stream_shared_cache(void) {
   GRPC_CLOSURE_INIT(&closure, not_called_closure, nullptr,
                     grpc_schedule_on_exec_ctx);
   // Read one slice from stream1.
-  GPR_ASSERT(
-      grpc_byte_stream_next(&exec_ctx, &stream1.base, ~(size_t)0, &closure));
+  GPR_ASSERT(grpc_byte_stream_next(&stream1.base, ~(size_t)0, &closure));
   grpc_slice output;
-  grpc_error* error = grpc_byte_stream_pull(&exec_ctx, &stream1.base, &output);
+  grpc_error* error = grpc_byte_stream_pull(&stream1.base, &output);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(grpc_slice_eq(input[0], output));
-  grpc_slice_unref_internal(&exec_ctx, output);
+  grpc_slice_unref_internal(output);
   // Read all slices from stream2.
   for (size_t i = 0; i < GPR_ARRAY_SIZE(input); ++i) {
-    GPR_ASSERT(
-        grpc_byte_stream_next(&exec_ctx, &stream2.base, ~(size_t)0, &closure));
-    error = grpc_byte_stream_pull(&exec_ctx, &stream2.base, &output);
+    GPR_ASSERT(grpc_byte_stream_next(&stream2.base, ~(size_t)0, &closure));
+    error = grpc_byte_stream_pull(&stream2.base, &output);
     GPR_ASSERT(error == GRPC_ERROR_NONE);
     GPR_ASSERT(grpc_slice_eq(input[i], output));
-    grpc_slice_unref_internal(&exec_ctx, output);
+    grpc_slice_unref_internal(output);
   }
   // Now read the second slice from stream1.
-  GPR_ASSERT(
-      grpc_byte_stream_next(&exec_ctx, &stream1.base, ~(size_t)0, &closure));
-  error = grpc_byte_stream_pull(&exec_ctx, &stream1.base, &output);
+  GPR_ASSERT(grpc_byte_stream_next(&stream1.base, ~(size_t)0, &closure));
+  error = grpc_byte_stream_pull(&stream1.base, &output);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(grpc_slice_eq(input[1], output));
-  grpc_slice_unref_internal(&exec_ctx, output);
+  grpc_slice_unref_internal(output);
   // Clean up.
-  grpc_byte_stream_destroy(&exec_ctx, &stream1.base);
-  grpc_byte_stream_destroy(&exec_ctx, &stream2.base);
-  grpc_byte_stream_cache_destroy(&exec_ctx, &cache);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_byte_stream_destroy(&stream1.base);
+  grpc_byte_stream_destroy(&stream2.base);
+  grpc_byte_stream_cache_destroy(&cache);
+  grpc_slice_buffer_destroy_internal(&buffer);
 }
 
 int main(int argc, char** argv) {
+  grpc_init();
   grpc_test_init(argc, argv);
   test_slice_buffer_stream_basic();
   test_slice_buffer_stream_shutdown();
   test_caching_byte_stream_basic();
   test_caching_byte_stream_reset();
   test_caching_byte_stream_shared_cache();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/transport/chttp2/bin_decoder_test.cc b/test/core/transport/chttp2/bin_decoder_test.cc
index a29ec8a13f..6d70a4261b 100644
--- a/test/core/transport/chttp2/bin_decoder_test.cc
+++ b/test/core/transport/chttp2/bin_decoder_test.cc
@@ -20,6 +20,7 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include "src/core/ext/transport/chttp2/transport/bin_encoder.h"
@@ -29,8 +30,8 @@
 
 static int all_ok = 1;
 
-static void expect_slice_eq(grpc_exec_ctx* exec_ctx, grpc_slice expected,
-                            grpc_slice slice, const char* debug, int line) {
+static void expect_slice_eq(grpc_slice expected, grpc_slice slice,
+                            const char* debug, int line) {
   if (!grpc_slice_eq(slice, expected)) {
     char* hs = grpc_dump_slice(slice, GPR_DUMP_HEX | GPR_DUMP_ASCII);
     char* he = grpc_dump_slice(expected, GPR_DUMP_HEX | GPR_DUMP_ASCII);
@@ -40,104 +41,97 @@ static void expect_slice_eq(grpc_exec_ctx* exec_ctx, grpc_slice expected,
     gpr_free(he);
     all_ok = 0;
   }
-  grpc_slice_unref_internal(exec_ctx, expected);
-  grpc_slice_unref_internal(exec_ctx, slice);
+  grpc_slice_unref_internal(expected);
+  grpc_slice_unref_internal(slice);
 }
 
-static grpc_slice base64_encode(grpc_exec_ctx* exec_ctx, const char* s) {
+static grpc_slice base64_encode(const char* s) {
   grpc_slice ss = grpc_slice_from_copied_string(s);
   grpc_slice out = grpc_chttp2_base64_encode(ss);
-  grpc_slice_unref_internal(exec_ctx, ss);
+  grpc_slice_unref_internal(ss);
   return out;
 }
 
-static grpc_slice base64_decode(grpc_exec_ctx* exec_ctx, const char* s) {
+static grpc_slice base64_decode(const char* s) {
   grpc_slice ss = grpc_slice_from_copied_string(s);
-  grpc_slice out = grpc_chttp2_base64_decode(exec_ctx, ss);
-  grpc_slice_unref_internal(exec_ctx, ss);
+  grpc_slice out = grpc_chttp2_base64_decode(ss);
+  grpc_slice_unref_internal(ss);
   return out;
 }
 
-static grpc_slice base64_decode_with_length(grpc_exec_ctx* exec_ctx,
-                                            const char* s,
+static grpc_slice base64_decode_with_length(const char* s,
                                             size_t output_length) {
   grpc_slice ss = grpc_slice_from_copied_string(s);
-  grpc_slice out =
-      grpc_chttp2_base64_decode_with_length(exec_ctx, ss, output_length);
-  grpc_slice_unref_internal(exec_ctx, ss);
+  grpc_slice out = grpc_chttp2_base64_decode_with_length(ss, output_length);
+  grpc_slice_unref_internal(ss);
   return out;
 }
 
-#define EXPECT_SLICE_EQ(exec_ctx, expected, slice)                             \
-  expect_slice_eq(                                                             \
-      exec_ctx, grpc_slice_from_copied_buffer(expected, sizeof(expected) - 1), \
-      slice, #slice, __LINE__);
+#define EXPECT_SLICE_EQ(expected, slice)                                    \
+  expect_slice_eq(                                                          \
+      grpc_slice_from_copied_buffer(expected, sizeof(expected) - 1), slice, \
+      #slice, __LINE__);
 
-#define ENCODE_AND_DECODE(exec_ctx, s)                   \
-  EXPECT_SLICE_EQ(exec_ctx, s,                           \
-                  grpc_chttp2_base64_decode_with_length( \
-                      exec_ctx, base64_encode(exec_ctx, s), strlen(s)));
+#define ENCODE_AND_DECODE(s) \
+  EXPECT_SLICE_EQ(           \
+      s, grpc_chttp2_base64_decode_with_length(base64_encode(s), strlen(s)));
 
 int main(int argc, char** argv) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-
-  /* ENCODE_AND_DECODE tests grpc_chttp2_base64_decode_with_length(), which
-     takes encoded base64 strings without pad chars, but output length is
-     required. */
-  /* Base64 test vectors from RFC 4648 */
-  ENCODE_AND_DECODE(&exec_ctx, "");
-  ENCODE_AND_DECODE(&exec_ctx, "f");
-  ENCODE_AND_DECODE(&exec_ctx, "foo");
-  ENCODE_AND_DECODE(&exec_ctx, "fo");
-  ENCODE_AND_DECODE(&exec_ctx, "foob");
-  ENCODE_AND_DECODE(&exec_ctx, "fooba");
-  ENCODE_AND_DECODE(&exec_ctx, "foobar");
-
-  ENCODE_AND_DECODE(&exec_ctx, "\xc0\xc1\xc2\xc3\xc4\xc5");
-
-  /* Base64 test vectors from RFC 4648, with pad chars */
-  /* BASE64("") = "" */
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, ""));
-  /* BASE64("f") = "Zg==" */
-  EXPECT_SLICE_EQ(&exec_ctx, "f", base64_decode(&exec_ctx, "Zg=="));
-  /* BASE64("fo") = "Zm8=" */
-  EXPECT_SLICE_EQ(&exec_ctx, "fo", base64_decode(&exec_ctx, "Zm8="));
-  /* BASE64("foo") = "Zm9v" */
-  EXPECT_SLICE_EQ(&exec_ctx, "foo", base64_decode(&exec_ctx, "Zm9v"));
-  /* BASE64("foob") = "Zm9vYg==" */
-  EXPECT_SLICE_EQ(&exec_ctx, "foob", base64_decode(&exec_ctx, "Zm9vYg=="));
-  /* BASE64("fooba") = "Zm9vYmE=" */
-  EXPECT_SLICE_EQ(&exec_ctx, "fooba", base64_decode(&exec_ctx, "Zm9vYmE="));
-  /* BASE64("foobar") = "Zm9vYmFy" */
-  EXPECT_SLICE_EQ(&exec_ctx, "foobar", base64_decode(&exec_ctx, "Zm9vYmFy"));
-
-  EXPECT_SLICE_EQ(&exec_ctx, "\xc0\xc1\xc2\xc3\xc4\xc5",
-                  base64_decode(&exec_ctx, "wMHCw8TF"));
-
-  // Test illegal input length in grpc_chttp2_base64_decode
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "a"));
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "ab"));
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "abc"));
-
-  // Test illegal charactors in grpc_chttp2_base64_decode
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "Zm:v"));
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "Zm=v"));
-
-  // Test output_length longer than max possible output length in
-  // grpc_chttp2_base64_decode_with_length
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode_with_length(&exec_ctx, "Zg", 2));
-  EXPECT_SLICE_EQ(&exec_ctx, "",
-                  base64_decode_with_length(&exec_ctx, "Zm8", 3));
-  EXPECT_SLICE_EQ(&exec_ctx, "",
-                  base64_decode_with_length(&exec_ctx, "Zm9v", 4));
-
-  // Test illegal charactors in grpc_chttp2_base64_decode_with_length
-  EXPECT_SLICE_EQ(&exec_ctx, "",
-                  base64_decode_with_length(&exec_ctx, "Zm:v", 3));
-  EXPECT_SLICE_EQ(&exec_ctx, "",
-                  base64_decode_with_length(&exec_ctx, "Zm=v", 3));
-
-  grpc_exec_ctx_finish(&exec_ctx);
-
+  grpc_init();
+  {
+    grpc_core::ExecCtx exec_ctx;
+
+    /* ENCODE_AND_DECODE tests grpc_chttp2_base64_decode_with_length(), which
+       takes encoded base64 strings without pad chars, but output length is
+       required. */
+    /* Base64 test vectors from RFC 4648 */
+    ENCODE_AND_DECODE("");
+    ENCODE_AND_DECODE("f");
+    ENCODE_AND_DECODE("foo");
+    ENCODE_AND_DECODE("fo");
+    ENCODE_AND_DECODE("foob");
+    ENCODE_AND_DECODE("fooba");
+    ENCODE_AND_DECODE("foobar");
+
+    ENCODE_AND_DECODE("\xc0\xc1\xc2\xc3\xc4\xc5");
+
+    /* Base64 test vectors from RFC 4648, with pad chars */
+    /* BASE64("") = "" */
+    EXPECT_SLICE_EQ("", base64_decode(""));
+    /* BASE64("f") = "Zg==" */
+    EXPECT_SLICE_EQ("f", base64_decode("Zg=="));
+    /* BASE64("fo") = "Zm8=" */
+    EXPECT_SLICE_EQ("fo", base64_decode("Zm8="));
+    /* BASE64("foo") = "Zm9v" */
+    EXPECT_SLICE_EQ("foo", base64_decode("Zm9v"));
+    /* BASE64("foob") = "Zm9vYg==" */
+    EXPECT_SLICE_EQ("foob", base64_decode("Zm9vYg=="));
+    /* BASE64("fooba") = "Zm9vYmE=" */
+    EXPECT_SLICE_EQ("fooba", base64_decode("Zm9vYmE="));
+    /* BASE64("foobar") = "Zm9vYmFy" */
+    EXPECT_SLICE_EQ("foobar", base64_decode("Zm9vYmFy"));
+
+    EXPECT_SLICE_EQ("\xc0\xc1\xc2\xc3\xc4\xc5", base64_decode("wMHCw8TF"));
+
+    // Test illegal input length in grpc_chttp2_base64_decode
+    EXPECT_SLICE_EQ("", base64_decode("a"));
+    EXPECT_SLICE_EQ("", base64_decode("ab"));
+    EXPECT_SLICE_EQ("", base64_decode("abc"));
+
+    // Test illegal charactors in grpc_chttp2_base64_decode
+    EXPECT_SLICE_EQ("", base64_decode("Zm:v"));
+    EXPECT_SLICE_EQ("", base64_decode("Zm=v"));
+
+    // Test output_length longer than max possible output length in
+    // grpc_chttp2_base64_decode_with_length
+    EXPECT_SLICE_EQ("", base64_decode_with_length("Zg", 2));
+    EXPECT_SLICE_EQ("", base64_decode_with_length("Zm8", 3));
+    EXPECT_SLICE_EQ("", base64_decode_with_length("Zm9v", 4));
+
+    // Test illegal charactors in grpc_chttp2_base64_decode_with_length
+    EXPECT_SLICE_EQ("", base64_decode_with_length("Zm:v", 3));
+    EXPECT_SLICE_EQ("", base64_decode_with_length("Zm=v", 3));
+  }
+  grpc_shutdown();
   return all_ok ? 0 : 1;
 }
diff --git a/test/core/transport/chttp2/bin_encoder_test.cc b/test/core/transport/chttp2/bin_encoder_test.cc
index 78b8808c41..44f5de8a50 100644
--- a/test/core/transport/chttp2/bin_encoder_test.cc
+++ b/test/core/transport/chttp2/bin_encoder_test.cc
@@ -99,6 +99,8 @@ static void expect_binary_header(const char* hdr, int binary) {
 }
 
 int main(int argc, char** argv) {
+  grpc_init();
+
   /* Base64 test vectors from RFC 4648, with padding removed */
   /* BASE64("") = "" */
   EXPECT_SLICE_EQ("", B64(""));
@@ -169,5 +171,6 @@ int main(int argc, char** argv) {
   expect_binary_header("foo-bar", 0);
   expect_binary_header("-bin", 0);
 
+  grpc_shutdown();
   return all_ok ? 0 : 1;
 }
diff --git a/test/core/transport/chttp2/hpack_encoder_test.cc b/test/core/transport/chttp2/hpack_encoder_test.cc
index 2d18b72504..d2dbd4a798 100644
--- a/test/core/transport/chttp2/hpack_encoder_test.cc
+++ b/test/core/transport/chttp2/hpack_encoder_test.cc
@@ -51,8 +51,8 @@ typedef struct {
 
 /* verify that the output generated by encoding the stream matches the
    hexstring passed in */
-static void verify(grpc_exec_ctx* exec_ctx, const verify_params params,
-                   const char* expected, size_t nheaders, ...) {
+static void verify(const verify_params params, const char* expected,
+                   size_t nheaders, ...) {
   grpc_slice_buffer output;
   grpc_slice merged;
   grpc_slice expect = parse_hexstring(expected);
@@ -77,8 +77,7 @@ static void verify(grpc_exec_ctx* exec_ctx, const verify_params params,
       value_slice = grpc_slice_intern(value_slice);
     }
     e[i].md = grpc_mdelem_from_slices(
-        exec_ctx, grpc_slice_intern(grpc_slice_from_static_string(key)),
-        value_slice);
+        grpc_slice_intern(grpc_slice_from_static_string(key)), value_slice);
   }
   e[0].prev = nullptr;
   e[nheaders - 1].next = nullptr;
@@ -106,11 +105,10 @@ static void verify(grpc_exec_ctx* exec_ctx, const verify_params params,
       16384,                           /* max_frame_size */
       &stats                           /* stats */
   };
-  grpc_chttp2_encode_header(exec_ctx, &g_compressor, nullptr, 0, &b, &hopt,
-                            &output);
+  grpc_chttp2_encode_header(&g_compressor, nullptr, 0, &b, &hopt, &output);
   merged = grpc_slice_merge(output.slices, output.count);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &output);
-  grpc_metadata_batch_destroy(exec_ctx, &b);
+  grpc_slice_buffer_destroy_internal(&output);
+  grpc_metadata_batch_destroy(&b);
 
   if (!grpc_slice_eq(merged, expect)) {
     char* expect_str = grpc_dump_slice(expect, GPR_DUMP_HEX | GPR_DUMP_ASCII);
@@ -123,11 +121,11 @@ static void verify(grpc_exec_ctx* exec_ctx, const verify_params params,
     g_failure = 1;
   }
 
-  grpc_slice_unref_internal(exec_ctx, merged);
-  grpc_slice_unref_internal(exec_ctx, expect);
+  grpc_slice_unref_internal(merged);
+  grpc_slice_unref_internal(expect);
 }
 
-static void test_basic_headers(grpc_exec_ctx* exec_ctx) {
+static void test_basic_headers() {
   int i;
 
   verify_params params = {
@@ -135,24 +133,22 @@ static void test_basic_headers(grpc_exec_ctx* exec_ctx) {
       false,
       false,
   };
-  verify(exec_ctx, params, "000005 0104 deadbeef 40 0161 0161", 1, "a", "a");
-  verify(exec_ctx, params, "000001 0104 deadbeef be", 1, "a", "a");
-  verify(exec_ctx, params, "000001 0104 deadbeef be", 1, "a", "a");
-  verify(exec_ctx, params, "000006 0104 deadbeef be 40 0162 0163", 2, "a", "a",
-         "b", "c");
-  verify(exec_ctx, params, "000002 0104 deadbeef bf be", 2, "a", "a", "b", "c");
-  verify(exec_ctx, params, "000004 0104 deadbeef 7f 00 0164", 1, "a", "d");
+  verify(params, "000005 0104 deadbeef 40 0161 0161", 1, "a", "a");
+  verify(params, "000001 0104 deadbeef be", 1, "a", "a");
+  verify(params, "000001 0104 deadbeef be", 1, "a", "a");
+  verify(params, "000006 0104 deadbeef be 40 0162 0163", 2, "a", "a", "b", "c");
+  verify(params, "000002 0104 deadbeef bf be", 2, "a", "a", "b", "c");
+  verify(params, "000004 0104 deadbeef 7f 00 0164", 1, "a", "d");
 
   /* flush out what's there to make a few values look very popular */
   for (i = 0; i < 350; i++) {
-    verify(exec_ctx, params, "000003 0104 deadbeef c0 bf be", 3, "a", "a", "b",
-           "c", "a", "d");
+    verify(params, "000003 0104 deadbeef c0 bf be", 3, "a", "a", "b", "c", "a",
+           "d");
   }
 
-  verify(exec_ctx, params, "000006 0104 deadbeef c0 00 016b 0176", 2, "a", "a",
-         "k", "v");
+  verify(params, "000006 0104 deadbeef c0 00 016b 0176", 2, "a", "a", "k", "v");
   /* this could be 000004 0104 deadbeef 0f 30 0176 also */
-  verify(exec_ctx, params, "000004 0104 deadbeef 0f 2f 0176", 1, "a", "v");
+  verify(params, "000004 0104 deadbeef 0f 2f 0176", 1, "a", "v");
 }
 
 static void encode_int_to_str(int i, char* p) {
@@ -163,7 +159,7 @@ static void encode_int_to_str(int i, char* p) {
   p[2] = 0;
 }
 
-static void test_decode_table_overflow(grpc_exec_ctx* exec_ctx) {
+static void test_decode_table_overflow() {
   int i;
   char key[3], value[3];
   char* expect;
@@ -192,26 +188,24 @@ static void test_decode_table_overflow(grpc_exec_ctx* exec_ctx) {
     }
 
     if (i > 0) {
-      verify(exec_ctx, params, expect, 2, "aa", "ba", key, value);
+      verify(params, expect, 2, "aa", "ba", key, value);
     } else {
-      verify(exec_ctx, params, expect, 1, key, value);
+      verify(params, expect, 1, key, value);
     }
     gpr_free(expect);
   }
 
   /* if the above passes, then we must have just knocked this pair out of the
      decoder stack, and so we'll be forced to re-encode it */
-  verify(exec_ctx, params, "000007 0104 deadbeef 40 026161 026261", 1, "aa",
-         "ba");
+  verify(params, "000007 0104 deadbeef 40 026161 026261", 1, "aa", "ba");
 }
 
-static void verify_table_size_change_match_elem_size(grpc_exec_ctx* exec_ctx,
-                                                     const char* key,
+static void verify_table_size_change_match_elem_size(const char* key,
                                                      const char* value,
                                                      bool use_true_binary) {
   grpc_slice_buffer output;
   grpc_mdelem elem = grpc_mdelem_from_slices(
-      exec_ctx, grpc_slice_intern(grpc_slice_from_static_string(key)),
+      grpc_slice_intern(grpc_slice_from_static_string(key)),
       grpc_slice_intern(grpc_slice_from_static_string(value)));
   size_t elem_size = grpc_mdelem_get_size_in_hpack_table(elem, use_true_binary);
   size_t initial_table_size = g_compressor.table_size;
@@ -235,41 +229,38 @@ static void verify_table_size_change_match_elem_size(grpc_exec_ctx* exec_ctx,
       use_true_binary, /* use_true_binary_metadata */
       16384,           /* max_frame_size */
       &stats /* stats */};
-  grpc_chttp2_encode_header(exec_ctx, &g_compressor, nullptr, 0, &b, &hopt,
-                            &output);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &output);
-  grpc_metadata_batch_destroy(exec_ctx, &b);
+  grpc_chttp2_encode_header(&g_compressor, nullptr, 0, &b, &hopt, &output);
+  grpc_slice_buffer_destroy_internal(&output);
+  grpc_metadata_batch_destroy(&b);
 
   GPR_ASSERT(g_compressor.table_size == elem_size + initial_table_size);
   gpr_free(e);
 }
 
-static void test_encode_header_size(grpc_exec_ctx* exec_ctx) {
-  verify_table_size_change_match_elem_size(exec_ctx, "hello", "world", false);
-  verify_table_size_change_match_elem_size(exec_ctx, "hello-bin", "world",
-                                           false);
-  verify_table_size_change_match_elem_size(exec_ctx, "true-binary-bin",
+static void test_encode_header_size() {
+  verify_table_size_change_match_elem_size("hello", "world", false);
+  verify_table_size_change_match_elem_size("hello-bin", "world", false);
+  verify_table_size_change_match_elem_size("true-binary-bin",
                                            "I_am_true_binary_value", true);
 }
 
-static void test_interned_key_indexed(grpc_exec_ctx* exec_ctx) {
+static void test_interned_key_indexed() {
   int i;
   verify_params params = {false, false, true};
-  verify(exec_ctx, params, "000009 0104 deadbeef 40 0161 0162 0f2f 0163", 2,
-         "a", "b", "a", "c");
+  verify(params, "000009 0104 deadbeef 40 0161 0162 0f2f 0163", 2, "a", "b",
+         "a", "c");
   for (i = 0; i < 10; i++) {
-    verify(exec_ctx, params, "000008 0104 deadbeef 0f2f 0162 0f2f 0163", 2, "a",
-           "b", "a", "c");
+    verify(params, "000008 0104 deadbeef 0f2f 0162 0f2f 0163", 2, "a", "b", "a",
+           "c");
   }
 }
 
-static void run_test(void (*test)(grpc_exec_ctx* exec_ctx), const char* name) {
+static void run_test(void (*test)(), const char* name) {
   gpr_log(GPR_INFO, "RUN TEST: %s", name);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_chttp2_hpack_compressor_init(&g_compressor);
-  test(&exec_ctx);
-  grpc_chttp2_hpack_compressor_destroy(&exec_ctx, &g_compressor);
-  grpc_exec_ctx_finish(&exec_ctx);
+  test();
+  grpc_chttp2_hpack_compressor_destroy(&g_compressor);
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/transport/chttp2/hpack_parser_fuzzer_test.cc b/test/core/transport/chttp2/hpack_parser_fuzzer_test.cc
index 942f25e0b7..9a195daee0 100644
--- a/test/core/transport/chttp2/hpack_parser_fuzzer_test.cc
+++ b/test/core/transport/chttp2/hpack_parser_fuzzer_test.cc
@@ -29,9 +29,7 @@
 bool squelch = true;
 bool leak_check = true;
 
-static void onhdr(grpc_exec_ctx* exec_ctx, void* ud, grpc_mdelem md) {
-  GRPC_MDELEM_UNREF(exec_ctx, md);
-}
+static void onhdr(void* ud, grpc_mdelem md) { GRPC_MDELEM_UNREF(md); }
 static void dont_log(gpr_log_func_args* args) {}
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
@@ -39,13 +37,14 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   if (squelch) gpr_set_log_function(dont_log);
   grpc_init();
   grpc_chttp2_hpack_parser parser;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
-  parser.on_header = onhdr;
-  GRPC_ERROR_UNREF(grpc_chttp2_hpack_parser_parse(
-      &exec_ctx, &parser, grpc_slice_from_static_buffer(data, size)));
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_chttp2_hpack_parser_init(&parser);
+    parser.on_header = onhdr;
+    GRPC_ERROR_UNREF(grpc_chttp2_hpack_parser_parse(
+        &parser, grpc_slice_from_static_buffer(data, size)));
+    grpc_chttp2_hpack_parser_destroy(&parser);
+  }
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/transport/chttp2/hpack_parser_test.cc b/test/core/transport/chttp2/hpack_parser_test.cc
index 82fb20aced..9d3456a873 100644
--- a/test/core/transport/chttp2/hpack_parser_test.cc
+++ b/test/core/transport/chttp2/hpack_parser_test.cc
@@ -32,7 +32,7 @@ typedef struct {
   va_list args;
 } test_checker;
 
-static void onhdr(grpc_exec_ctx* exec_ctx, void* ud, grpc_mdelem md) {
+static void onhdr(void* ud, grpc_mdelem md) {
   const char *ekey, *evalue;
   test_checker* chk = static_cast<test_checker*>(ud);
   ekey = va_arg(chk->args, char*);
@@ -41,7 +41,7 @@ static void onhdr(grpc_exec_ctx* exec_ctx, void* ud, grpc_mdelem md) {
   GPR_ASSERT(evalue);
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDKEY(md), ekey) == 0);
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDVALUE(md), evalue) == 0);
-  GRPC_MDELEM_UNREF(exec_ctx, md);
+  GRPC_MDELEM_UNREF(md);
 }
 
 static void test_vector(grpc_chttp2_hpack_parser* parser,
@@ -62,10 +62,9 @@ static void test_vector(grpc_chttp2_hpack_parser* parser,
   grpc_slice_unref(input);
 
   for (i = 0; i < nslices; i++) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GPR_ASSERT(grpc_chttp2_hpack_parser_parse(&exec_ctx, parser, slices[i]) ==
+    grpc_core::ExecCtx exec_ctx;
+    GPR_ASSERT(grpc_chttp2_hpack_parser_parse(parser, slices[i]) ==
                GRPC_ERROR_NONE);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 
   for (i = 0; i < nslices; i++) {
@@ -80,9 +79,9 @@ static void test_vector(grpc_chttp2_hpack_parser* parser,
 
 static void test_vectors(grpc_slice_split_mode mode) {
   grpc_chttp2_hpack_parser parser;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_init(&parser);
   /* D.2.1 */
   test_vector(&parser, mode,
               "400a 6375 7374 6f6d 2d6b 6579 0d63 7573"
@@ -98,9 +97,9 @@ static void test_vectors(grpc_slice_split_mode mode) {
               "password", "secret", NULL);
   /* D.2.4 */
   test_vector(&parser, mode, "82", ":method", "GET", NULL);
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_destroy(&parser);
 
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_init(&parser);
   /* D.3.1 */
   test_vector(&parser, mode,
               "8286 8441 0f77 7777 2e65 7861 6d70 6c65"
@@ -118,9 +117,9 @@ static void test_vectors(grpc_slice_split_mode mode) {
               ":method", "GET", ":scheme", "https", ":path", "/index.html",
               ":authority", "www.example.com", "custom-key", "custom-value",
               NULL);
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_destroy(&parser);
 
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_init(&parser);
   /* D.4.1 */
   test_vector(&parser, mode,
               "8286 8441 8cf1 e3c2 e5f2 3a6b a0ab 90f4"
@@ -138,11 +137,11 @@ static void test_vectors(grpc_slice_split_mode mode) {
               ":method", "GET", ":scheme", "https", ":path", "/index.html",
               ":authority", "www.example.com", "custom-key", "custom-value",
               NULL);
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_destroy(&parser);
 
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
-  grpc_chttp2_hptbl_set_max_bytes(&exec_ctx, &parser.table, 256);
-  grpc_chttp2_hptbl_set_current_table_size(&exec_ctx, &parser.table, 256);
+  grpc_chttp2_hpack_parser_init(&parser);
+  grpc_chttp2_hptbl_set_max_bytes(&parser.table, 256);
+  grpc_chttp2_hptbl_set_current_table_size(&parser.table, 256);
   /* D.5.1 */
   test_vector(&parser, mode,
               "4803 3330 3258 0770 7269 7661 7465 611d"
@@ -172,11 +171,11 @@ static void test_vectors(grpc_slice_split_mode mode) {
               "https://www.example.com", "content-encoding", "gzip",
               "set-cookie",
               "foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1", NULL);
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_destroy(&parser);
 
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
-  grpc_chttp2_hptbl_set_max_bytes(&exec_ctx, &parser.table, 256);
-  grpc_chttp2_hptbl_set_current_table_size(&exec_ctx, &parser.table, 256);
+  grpc_chttp2_hpack_parser_init(&parser);
+  grpc_chttp2_hptbl_set_max_bytes(&parser.table, 256);
+  grpc_chttp2_hptbl_set_current_table_size(&parser.table, 256);
   /* D.6.1 */
   test_vector(&parser, mode,
               "4882 6402 5885 aec3 771a 4b61 96d0 7abe"
@@ -203,9 +202,7 @@ static void test_vectors(grpc_slice_split_mode mode) {
               "https://www.example.com", "content-encoding", "gzip",
               "set-cookie",
               "foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1", NULL);
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
-
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_hpack_parser_destroy(&parser);
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/transport/chttp2/hpack_table_test.cc b/test/core/transport/chttp2/hpack_table_test.cc
index ff7c2de538..3f3cb2ee9d 100644
--- a/test/core/transport/chttp2/hpack_table_test.cc
+++ b/test/core/transport/chttp2/hpack_table_test.cc
@@ -44,10 +44,10 @@ static void assert_index(const grpc_chttp2_hptbl* tbl, uint32_t idx,
 }
 
 static void test_static_lookup(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_chttp2_hptbl tbl;
 
-  grpc_chttp2_hptbl_init(&exec_ctx, &tbl);
+  grpc_chttp2_hptbl_init(&tbl);
 
   LOG_TEST("test_static_lookup");
   assert_index(&tbl, 1, ":authority", "");
@@ -112,8 +112,7 @@ static void test_static_lookup(void) {
   assert_index(&tbl, 60, "via", "");
   assert_index(&tbl, 61, "www-authenticate", "");
 
-  grpc_chttp2_hptbl_destroy(&exec_ctx, &tbl);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_hptbl_destroy(&tbl);
 }
 
 static void test_many_additions(void) {
@@ -124,18 +123,17 @@ static void test_many_additions(void) {
 
   LOG_TEST("test_many_additions");
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_chttp2_hptbl_init(&exec_ctx, &tbl);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_chttp2_hptbl_init(&tbl);
 
   for (i = 0; i < 100000; i++) {
     grpc_mdelem elem;
     gpr_asprintf(&key, "K:%d", i);
     gpr_asprintf(&value, "VALUE:%d", i);
-    elem =
-        grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_copied_string(key),
-                                grpc_slice_from_copied_string(value));
-    GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
-    GRPC_MDELEM_UNREF(&exec_ctx, elem);
+    elem = grpc_mdelem_from_slices(grpc_slice_from_copied_string(key),
+                                   grpc_slice_from_copied_string(value));
+    GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
+    GRPC_MDELEM_UNREF(elem);
     assert_index(&tbl, 1 + GRPC_CHTTP2_LAST_STATIC_ENTRY, key, value);
     gpr_free(key);
     gpr_free(value);
@@ -148,25 +146,23 @@ static void test_many_additions(void) {
     }
   }
 
-  grpc_chttp2_hptbl_destroy(&exec_ctx, &tbl);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_hptbl_destroy(&tbl);
 }
 
 static grpc_chttp2_hptbl_find_result find_simple(grpc_chttp2_hptbl* tbl,
                                                  const char* key,
                                                  const char* value) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_mdelem md =
-      grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_copied_string(key),
-                              grpc_slice_from_copied_string(value));
+  grpc_core::ExecCtx exec_ctx;
+  grpc_mdelem md = grpc_mdelem_from_slices(
+      grpc_slice_from_copied_string(key), grpc_slice_from_copied_string(value));
   grpc_chttp2_hptbl_find_result r = grpc_chttp2_hptbl_find(tbl, md);
-  GRPC_MDELEM_UNREF(&exec_ctx, md);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(md);
+
   return r;
 }
 
 static void test_find(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_chttp2_hptbl tbl;
   uint32_t i;
   char buffer[32];
@@ -175,21 +171,19 @@ static void test_find(void) {
 
   LOG_TEST("test_find");
 
-  grpc_chttp2_hptbl_init(&exec_ctx, &tbl);
-  elem =
-      grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_static_string("abc"),
-                              grpc_slice_from_static_string("xyz"));
-  GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
-  GRPC_MDELEM_UNREF(&exec_ctx, elem);
-  elem =
-      grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_static_string("abc"),
-                              grpc_slice_from_static_string("123"));
-  GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
-  GRPC_MDELEM_UNREF(&exec_ctx, elem);
-  elem = grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_static_string("x"),
+  grpc_chttp2_hptbl_init(&tbl);
+  elem = grpc_mdelem_from_slices(grpc_slice_from_static_string("abc"),
+                                 grpc_slice_from_static_string("xyz"));
+  GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
+  GRPC_MDELEM_UNREF(elem);
+  elem = grpc_mdelem_from_slices(grpc_slice_from_static_string("abc"),
+                                 grpc_slice_from_static_string("123"));
+  GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
+  GRPC_MDELEM_UNREF(elem);
+  elem = grpc_mdelem_from_slices(grpc_slice_from_static_string("x"),
                                  grpc_slice_from_static_string("1"));
-  GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
-  GRPC_MDELEM_UNREF(&exec_ctx, elem);
+  GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
+  GRPC_MDELEM_UNREF(elem);
 
   r = find_simple(&tbl, "abc", "123");
   GPR_ASSERT(r.index == 2 + GRPC_CHTTP2_LAST_STATIC_ENTRY);
@@ -238,11 +232,10 @@ static void test_find(void) {
   /* overflow the string buffer, check find still works */
   for (i = 0; i < 10000; i++) {
     int64_ttoa(i, buffer);
-    elem = grpc_mdelem_from_slices(&exec_ctx,
-                                   grpc_slice_from_static_string("test"),
+    elem = grpc_mdelem_from_slices(grpc_slice_from_static_string("test"),
                                    grpc_slice_from_copied_string(buffer));
-    GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
-    GRPC_MDELEM_UNREF(&exec_ctx, elem);
+    GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
+    GRPC_MDELEM_UNREF(elem);
   }
 
   r = find_simple(&tbl, "abc", "123");
@@ -270,8 +263,7 @@ static void test_find(void) {
   GPR_ASSERT(r.index != 0);
   GPR_ASSERT(r.has_value == 0);
 
-  grpc_chttp2_hptbl_destroy(&exec_ctx, &tbl);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_hptbl_destroy(&tbl);
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/transport/chttp2/settings_timeout_test.cc b/test/core/transport/chttp2/settings_timeout_test.cc
index 670eae1f79..08473c72b6 100644
--- a/test/core/transport/chttp2/settings_timeout_test.cc
+++ b/test/core/transport/chttp2/settings_timeout_test.cc
@@ -97,7 +97,7 @@ class Client {
       : server_address_(server_address) {}
 
   void Connect() {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resolved_addresses* server_addresses = nullptr;
     grpc_error* error =
         grpc_blocking_resolve_address(server_address_, "80", &server_addresses);
@@ -106,56 +106,53 @@ class Client {
     pollset_ = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
     grpc_pollset_init(pollset_, &mu_);
     grpc_pollset_set* pollset_set = grpc_pollset_set_create();
-    grpc_pollset_set_add_pollset(&exec_ctx, pollset_set, pollset_);
+    grpc_pollset_set_add_pollset(pollset_set, pollset_);
     EventState state;
-    grpc_tcp_client_connect(&exec_ctx, state.closure(), &endpoint_, pollset_set,
+    grpc_tcp_client_connect(state.closure(), &endpoint_, pollset_set,
                             nullptr /* channel_args */, server_addresses->addrs,
                             1000);
     ASSERT_TRUE(PollUntilDone(
-        &exec_ctx, &state,
+        &state,
         grpc_timespec_to_millis_round_up(gpr_inf_future(GPR_CLOCK_MONOTONIC))));
     ASSERT_EQ(GRPC_ERROR_NONE, state.error());
-    grpc_pollset_set_destroy(&exec_ctx, pollset_set);
-    grpc_endpoint_add_to_pollset(&exec_ctx, endpoint_, pollset_);
+    grpc_pollset_set_destroy(pollset_set);
+    grpc_endpoint_add_to_pollset(endpoint_, pollset_);
     grpc_resolved_addresses_destroy(server_addresses);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 
   // Reads until an error is returned.
   // Returns true if an error was encountered before the deadline.
   bool ReadUntilError() {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_slice_buffer read_buffer;
     grpc_slice_buffer_init(&read_buffer);
     bool retval = true;
     // Use a deadline of 3 seconds, which is a lot more than we should
     // need for a 1-second timeout, but this helps avoid flakes.
-    grpc_millis deadline = grpc_exec_ctx_now(&exec_ctx) + 3000;
+    grpc_millis deadline = grpc_core::ExecCtx::Get()->Now() + 3000;
     while (true) {
       EventState state;
-      grpc_endpoint_read(&exec_ctx, endpoint_, &read_buffer, state.closure());
-      if (!PollUntilDone(&exec_ctx, &state, deadline)) {
+      grpc_endpoint_read(endpoint_, &read_buffer, state.closure());
+      if (!PollUntilDone(&state, deadline)) {
         retval = false;
         break;
       }
       if (state.error() != GRPC_ERROR_NONE) break;
       gpr_log(GPR_INFO, "client read %" PRIuPTR " bytes", read_buffer.length);
-      grpc_slice_buffer_reset_and_unref_internal(&exec_ctx, &read_buffer);
+      grpc_slice_buffer_reset_and_unref_internal(&read_buffer);
     }
-    grpc_endpoint_shutdown(&exec_ctx, endpoint_,
+    grpc_endpoint_shutdown(endpoint_,
                            GRPC_ERROR_CREATE_FROM_STATIC_STRING("shutdown"));
-    grpc_slice_buffer_destroy_internal(&exec_ctx, &read_buffer);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_slice_buffer_destroy_internal(&read_buffer);
     return retval;
   }
 
   void Shutdown() {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_endpoint_destroy(&exec_ctx, endpoint_);
-    grpc_pollset_shutdown(&exec_ctx, pollset_,
+    grpc_core::ExecCtx exec_ctx;
+    grpc_endpoint_destroy(endpoint_);
+    grpc_pollset_shutdown(pollset_,
                           GRPC_CLOSURE_CREATE(&Client::PollsetDestroy, pollset_,
                                               grpc_schedule_on_exec_ctx));
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 
  private:
@@ -177,8 +174,7 @@ class Client {
     grpc_error* error() const { return error_; }
 
    private:
-    static void OnEventDone(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+    static void OnEventDone(void* arg, grpc_error* error) {
       gpr_log(GPR_INFO, "OnEventDone(): %s", grpc_error_string(error));
       EventState* state = (EventState*)arg;
       state->error_ = GRPC_ERROR_REF(error);
@@ -191,24 +187,23 @@ class Client {
   };
 
   // Returns true if done, or false if deadline exceeded.
-  bool PollUntilDone(grpc_exec_ctx* exec_ctx, EventState* state,
-                     grpc_millis deadline) {
+  bool PollUntilDone(EventState* state, grpc_millis deadline) {
     while (true) {
       grpc_pollset_worker* worker = nullptr;
       gpr_mu_lock(mu_);
-      GRPC_LOG_IF_ERROR("grpc_pollset_work",
-                        grpc_pollset_work(exec_ctx, pollset_, &worker,
-                                          grpc_exec_ctx_now(exec_ctx) + 1000));
+      GRPC_LOG_IF_ERROR(
+          "grpc_pollset_work",
+          grpc_pollset_work(pollset_, &worker,
+                            grpc_core::ExecCtx::Get()->Now() + 1000));
       gpr_mu_unlock(mu_);
       if (state != nullptr && state->done()) return true;
-      if (grpc_exec_ctx_now(exec_ctx) >= deadline) return false;
+      if (grpc_core::ExecCtx::Get()->Now() >= deadline) return false;
     }
   }
 
-  static void PollsetDestroy(grpc_exec_ctx* exec_ctx, void* arg,
-                             grpc_error* error) {
+  static void PollsetDestroy(void* arg, grpc_error* error) {
     grpc_pollset* pollset = (grpc_pollset*)arg;
-    grpc_pollset_destroy(exec_ctx, pollset);
+    grpc_pollset_destroy(pollset);
     gpr_free(pollset);
   }
 
diff --git a/test/core/transport/chttp2/varint_test.cc b/test/core/transport/chttp2/varint_test.cc
index 413b461b3a..36760d0c72 100644
--- a/test/core/transport/chttp2/varint_test.cc
+++ b/test/core/transport/chttp2/varint_test.cc
@@ -18,6 +18,7 @@
 
 #include "src/core/ext/transport/chttp2/transport/varint.h"
 
+#include <grpc/grpc.h>
 #include <grpc/slice.h>
 #include <grpc/support/log.h>
 
@@ -44,11 +45,13 @@ static void test_varint(uint32_t value, uint32_t prefix_bits, uint8_t prefix_or,
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   TEST_VARINT(0, 1, 0, "\x00");
   TEST_VARINT(128, 1, 0, "\x7f\x01");
   TEST_VARINT(16384, 1, 0, "\x7f\x81\x7f");
   TEST_VARINT(2097152, 1, 0, "\x7f\x81\xff\x7f");
   TEST_VARINT(268435456, 1, 0, "\x7f\x81\xff\xff\x7f");
   TEST_VARINT(0xffffffff, 1, 0, "\x7f\x80\xff\xff\xff\x0f");
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/transport/connectivity_state_test.cc b/test/core/transport/connectivity_state_test.cc
index 11046e126e..f5894599e5 100644
--- a/test/core/transport/connectivity_state_test.cc
+++ b/test/core/transport/connectivity_state_test.cc
@@ -29,14 +29,13 @@
 
 int g_counter;
 
-static void must_succeed(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
+static void must_succeed(void* arg, grpc_error* error) {
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(arg == THE_ARG);
   g_counter++;
 }
 
-static void must_fail(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void must_fail(void* arg, grpc_error* error) {
   GPR_ASSERT(error != GRPC_ERROR_NONE);
   GPR_ASSERT(arg == THE_ARG);
   g_counter++;
@@ -59,7 +58,7 @@ static void test_connectivity_state_name(void) {
 
 static void test_check(void) {
   grpc_connectivity_state_tracker tracker;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_error* error;
   gpr_log(GPR_DEBUG, "test_check");
   grpc_connectivity_state_init(&tracker, GRPC_CHANNEL_IDLE, "xxx");
@@ -67,8 +66,7 @@ static void test_check(void) {
              GRPC_CHANNEL_IDLE);
   GPR_ASSERT(grpc_connectivity_state_check(&tracker) == GRPC_CHANNEL_IDLE);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
-  grpc_connectivity_state_destroy(&exec_ctx, &tracker);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_connectivity_state_destroy(&tracker);
 }
 
 static void test_subscribe_then_unsubscribe(void) {
@@ -76,23 +74,21 @@ static void test_subscribe_then_unsubscribe(void) {
   grpc_closure* closure =
       GRPC_CLOSURE_CREATE(must_fail, THE_ARG, grpc_schedule_on_exec_ctx);
   grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_log(GPR_DEBUG, "test_subscribe_then_unsubscribe");
   g_counter = 0;
   grpc_connectivity_state_init(&tracker, GRPC_CHANNEL_IDLE, "xxx");
-  GPR_ASSERT(grpc_connectivity_state_notify_on_state_change(&exec_ctx, &tracker,
-                                                            &state, closure));
-  grpc_exec_ctx_flush(&exec_ctx);
+  GPR_ASSERT(grpc_connectivity_state_notify_on_state_change(&tracker, &state,
+                                                            closure));
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(state == GRPC_CHANNEL_IDLE);
   GPR_ASSERT(g_counter == 0);
-  grpc_connectivity_state_notify_on_state_change(&exec_ctx, &tracker, nullptr,
-                                                 closure);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_connectivity_state_notify_on_state_change(&tracker, nullptr, closure);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(state == GRPC_CHANNEL_IDLE);
   GPR_ASSERT(g_counter == 1);
 
-  grpc_connectivity_state_destroy(&exec_ctx, &tracker);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_connectivity_state_destroy(&tracker);
 }
 
 static void test_subscribe_then_destroy(void) {
@@ -100,17 +96,18 @@ static void test_subscribe_then_destroy(void) {
   grpc_closure* closure =
       GRPC_CLOSURE_CREATE(must_succeed, THE_ARG, grpc_schedule_on_exec_ctx);
   grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_log(GPR_DEBUG, "test_subscribe_then_destroy");
   g_counter = 0;
   grpc_connectivity_state_init(&tracker, GRPC_CHANNEL_IDLE, "xxx");
-  GPR_ASSERT(grpc_connectivity_state_notify_on_state_change(&exec_ctx, &tracker,
-                                                            &state, closure));
-  grpc_exec_ctx_flush(&exec_ctx);
+  GPR_ASSERT(grpc_connectivity_state_notify_on_state_change(&tracker, &state,
+                                                            closure));
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(state == GRPC_CHANNEL_IDLE);
   GPR_ASSERT(g_counter == 0);
-  grpc_connectivity_state_destroy(&exec_ctx, &tracker);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_connectivity_state_destroy(&tracker);
+
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(state == GRPC_CHANNEL_SHUTDOWN);
   GPR_ASSERT(g_counter == 1);
 }
@@ -120,28 +117,30 @@ static void test_subscribe_with_failure_then_destroy(void) {
   grpc_closure* closure =
       GRPC_CLOSURE_CREATE(must_fail, THE_ARG, grpc_schedule_on_exec_ctx);
   grpc_connectivity_state state = GRPC_CHANNEL_SHUTDOWN;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_log(GPR_DEBUG, "test_subscribe_with_failure_then_destroy");
   g_counter = 0;
   grpc_connectivity_state_init(&tracker, GRPC_CHANNEL_SHUTDOWN, "xxx");
   GPR_ASSERT(0 == grpc_connectivity_state_notify_on_state_change(
-                      &exec_ctx, &tracker, &state, closure));
-  grpc_exec_ctx_flush(&exec_ctx);
+                      &tracker, &state, closure));
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(state == GRPC_CHANNEL_SHUTDOWN);
   GPR_ASSERT(g_counter == 0);
-  grpc_connectivity_state_destroy(&exec_ctx, &tracker);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_connectivity_state_destroy(&tracker);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(state == GRPC_CHANNEL_SHUTDOWN);
   GPR_ASSERT(g_counter == 1);
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   grpc_core::testing::grpc_tracer_enable_flag(&grpc_connectivity_state_trace);
   test_connectivity_state_name();
   test_check();
   test_subscribe_then_unsubscribe();
   test_subscribe_then_destroy();
   test_subscribe_with_failure_then_destroy();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/transport/metadata_test.cc b/test/core/transport/metadata_test.cc
index b60a9619fb..5c52ae8d5f 100644
--- a/test/core/transport/metadata_test.cc
+++ b/test/core/transport/metadata_test.cc
@@ -60,15 +60,15 @@ static void test_create_metadata(bool intern_keys, bool intern_values) {
           intern_keys, intern_values);
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   m1 = grpc_mdelem_from_slices(
-      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
       maybe_intern(grpc_slice_from_static_string("b"), intern_values));
   m2 = grpc_mdelem_from_slices(
-      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
       maybe_intern(grpc_slice_from_static_string("b"), intern_values));
   m3 = grpc_mdelem_from_slices(
-      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
       maybe_intern(grpc_slice_from_static_string("c"), intern_values));
   GPR_ASSERT(grpc_mdelem_eq(m1, m2));
   GPR_ASSERT(!grpc_mdelem_eq(m3, m1));
@@ -77,10 +77,10 @@ static void test_create_metadata(bool intern_keys, bool intern_values) {
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDKEY(m1), "a") == 0);
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDVALUE(m1), "b") == 0);
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDVALUE(m3), "c") == 0);
-  GRPC_MDELEM_UNREF(&exec_ctx, m1);
-  GRPC_MDELEM_UNREF(&exec_ctx, m2);
-  GRPC_MDELEM_UNREF(&exec_ctx, m3);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(m1);
+  GRPC_MDELEM_UNREF(m2);
+  GRPC_MDELEM_UNREF(m3);
+
   grpc_shutdown();
 }
 
@@ -95,19 +95,15 @@ static void test_create_many_ephemeral_metadata(bool intern_keys,
       intern_keys, intern_values);
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   /* add, and immediately delete a bunch of different elements */
   for (i = 0; i < MANY; i++) {
     gpr_ltoa(i, buffer);
-    GRPC_MDELEM_UNREF(
-        &exec_ctx,
-        grpc_mdelem_from_slices(
-            &exec_ctx,
-            maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
-            maybe_intern(grpc_slice_from_copied_string(buffer),
-                         intern_values)));
+    GRPC_MDELEM_UNREF(grpc_mdelem_from_slices(
+        maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+        maybe_intern(grpc_slice_from_copied_string(buffer), intern_values)));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_shutdown();
 }
 
@@ -121,28 +117,28 @@ static void test_create_many_persistant_metadata(void) {
   gpr_log(GPR_INFO, "test_create_many_persistant_metadata");
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   /* add phase */
   for (i = 0; i < MANY; i++) {
     gpr_ltoa(i, buffer);
     created[i] = grpc_mdelem_from_slices(
-        &exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("a")),
+        grpc_slice_intern(grpc_slice_from_static_string("a")),
         grpc_slice_intern(grpc_slice_from_static_string(buffer)));
   }
   /* verify phase */
   for (i = 0; i < MANY; i++) {
     gpr_ltoa(i, buffer);
     md = grpc_mdelem_from_slices(
-        &exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("a")),
+        grpc_slice_intern(grpc_slice_from_static_string("a")),
         grpc_slice_intern(grpc_slice_from_static_string(buffer)));
     GPR_ASSERT(grpc_mdelem_eq(md, created[i]));
-    GRPC_MDELEM_UNREF(&exec_ctx, md);
+    GRPC_MDELEM_UNREF(md);
   }
   /* cleanup phase */
   for (i = 0; i < MANY; i++) {
-    GRPC_MDELEM_UNREF(&exec_ctx, created[i]);
+    GRPC_MDELEM_UNREF(created[i]);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_shutdown();
 
   gpr_free(created);
@@ -155,31 +151,25 @@ static void test_spin_creating_the_same_thing(bool intern_keys,
           intern_keys, intern_values);
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem a, b, c;
   GRPC_MDELEM_UNREF(
-      &exec_ctx,
       a = grpc_mdelem_from_slices(
-          &exec_ctx,
           maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
           maybe_intern(grpc_slice_from_static_string("b"), intern_values)));
   GRPC_MDELEM_UNREF(
-      &exec_ctx,
       b = grpc_mdelem_from_slices(
-          &exec_ctx,
           maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
           maybe_intern(grpc_slice_from_static_string("b"), intern_values)));
   GRPC_MDELEM_UNREF(
-      &exec_ctx,
       c = grpc_mdelem_from_slices(
-          &exec_ctx,
           maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
           maybe_intern(grpc_slice_from_static_string("b"), intern_values)));
   if (intern_keys && intern_values) {
     GPR_ASSERT(a.payload == b.payload);
     GPR_ASSERT(a.payload == c.payload);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_shutdown();
 }
 
@@ -188,16 +178,16 @@ static void test_identity_laws(bool intern_keys, bool intern_values) {
           intern_keys, intern_values);
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem a, b, c;
   a = grpc_mdelem_from_slices(
-      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
       maybe_intern(grpc_slice_from_static_string("b"), intern_values));
   b = grpc_mdelem_from_slices(
-      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
       maybe_intern(grpc_slice_from_static_string("b"), intern_values));
   c = grpc_mdelem_from_slices(
-      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
       maybe_intern(grpc_slice_from_static_string("b"), intern_values));
   GPR_ASSERT(grpc_mdelem_eq(a, a));
   GPR_ASSERT(grpc_mdelem_eq(b, b));
@@ -216,10 +206,10 @@ static void test_identity_laws(bool intern_keys, bool intern_values) {
     GPR_ASSERT(a.payload != c.payload);
     GPR_ASSERT(b.payload != c.payload);
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, a);
-  GRPC_MDELEM_UNREF(&exec_ctx, b);
-  GRPC_MDELEM_UNREF(&exec_ctx, c);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(a);
+  GRPC_MDELEM_UNREF(b);
+  GRPC_MDELEM_UNREF(c);
+
   grpc_shutdown();
 }
 
@@ -235,7 +225,7 @@ static void test_things_stick_around(void) {
   gpr_log(GPR_INFO, "test_things_stick_around");
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   for (i = 0; i < nstrs; i++) {
     gpr_asprintf(&buffer, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx%" PRIuPTR "x", i);
@@ -246,7 +236,7 @@ static void test_things_stick_around(void) {
 
   for (i = 0; i < nstrs; i++) {
     grpc_slice_ref_internal(strs[i]);
-    grpc_slice_unref_internal(&exec_ctx, strs[i]);
+    grpc_slice_unref_internal(strs[i]);
   }
 
   for (i = 0; i < nstrs; i++) {
@@ -258,18 +248,17 @@ static void test_things_stick_around(void) {
   }
 
   for (i = 0; i < nstrs; i++) {
-    grpc_slice_unref_internal(&exec_ctx, strs[shuf[i]]);
+    grpc_slice_unref_internal(strs[shuf[i]]);
     for (j = i + 1; j < nstrs; j++) {
       gpr_asprintf(&buffer, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx%" PRIuPTR "x",
                    shuf[j]);
       test = grpc_slice_intern(grpc_slice_from_static_string(buffer));
       GPR_ASSERT(grpc_slice_is_equivalent(test, strs[shuf[j]]));
-      grpc_slice_unref_internal(&exec_ctx, test);
+      grpc_slice_unref_internal(test);
       gpr_free(buffer);
     }
   }
 
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   gpr_free(strs);
   gpr_free(shuf);
@@ -282,39 +271,38 @@ static void test_user_data_works(void) {
   gpr_log(GPR_INFO, "test_user_data_works");
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   ud1 = static_cast<int*>(gpr_malloc(sizeof(int)));
   *ud1 = 1;
   ud2 = static_cast<int*>(gpr_malloc(sizeof(int)));
   *ud2 = 2;
   md = grpc_mdelem_from_slices(
-      &exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("abc")),
+      grpc_slice_intern(grpc_slice_from_static_string("abc")),
       grpc_slice_intern(grpc_slice_from_static_string("123")));
   grpc_mdelem_set_user_data(md, gpr_free, ud1);
   grpc_mdelem_set_user_data(md, gpr_free, ud2);
   GPR_ASSERT(grpc_mdelem_get_user_data(md, gpr_free) == ud1);
-  GRPC_MDELEM_UNREF(&exec_ctx, md);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(md);
+
   grpc_shutdown();
 }
 
-static void verify_ascii_header_size(grpc_exec_ctx* exec_ctx, const char* key,
-                                     const char* value, bool intern_key,
-                                     bool intern_value) {
+static void verify_ascii_header_size(const char* key, const char* value,
+                                     bool intern_key, bool intern_value) {
   grpc_mdelem elem = grpc_mdelem_from_slices(
-      exec_ctx, maybe_intern(grpc_slice_from_static_string(key), intern_key),
+      maybe_intern(grpc_slice_from_static_string(key), intern_key),
       maybe_intern(grpc_slice_from_static_string(value), intern_value));
   size_t elem_size = grpc_mdelem_get_size_in_hpack_table(elem, false);
   size_t expected_size = 32 + strlen(key) + strlen(value);
   GPR_ASSERT(expected_size == elem_size);
-  GRPC_MDELEM_UNREF(exec_ctx, elem);
+  GRPC_MDELEM_UNREF(elem);
 }
 
-static void verify_binary_header_size(grpc_exec_ctx* exec_ctx, const char* key,
-                                      const uint8_t* value, size_t value_len,
-                                      bool intern_key, bool intern_value) {
+static void verify_binary_header_size(const char* key, const uint8_t* value,
+                                      size_t value_len, bool intern_key,
+                                      bool intern_value) {
   grpc_mdelem elem = grpc_mdelem_from_slices(
-      exec_ctx, maybe_intern(grpc_slice_from_static_string(key), intern_key),
+      maybe_intern(grpc_slice_from_static_string(key), intern_key),
       maybe_intern(grpc_slice_from_static_buffer(value, value_len),
                    intern_value));
   GPR_ASSERT(grpc_is_binary_header(GRPC_MDKEY(elem)));
@@ -324,9 +312,9 @@ static void verify_binary_header_size(grpc_exec_ctx* exec_ctx, const char* key,
   grpc_slice base64_encoded = grpc_chttp2_base64_encode(value_slice);
   size_t expected_size = 32 + strlen(key) + GRPC_SLICE_LENGTH(base64_encoded);
   GPR_ASSERT(expected_size == elem_size);
-  grpc_slice_unref_internal(exec_ctx, value_slice);
-  grpc_slice_unref_internal(exec_ctx, base64_encoded);
-  GRPC_MDELEM_UNREF(exec_ctx, elem);
+  grpc_slice_unref_internal(value_slice);
+  grpc_slice_unref_internal(base64_encoded);
+  GRPC_MDELEM_UNREF(elem);
 }
 
 #define BUFFER_SIZE 64
@@ -334,27 +322,23 @@ static void test_mdelem_sizes_in_hpack(bool intern_key, bool intern_value) {
   gpr_log(GPR_INFO, "test_mdelem_size: intern_key=%d intern_value=%d",
           intern_key, intern_value);
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   uint8_t binary_value[BUFFER_SIZE] = {0};
   for (uint8_t i = 0; i < BUFFER_SIZE; i++) {
     binary_value[i] = i;
   }
 
-  verify_ascii_header_size(&exec_ctx, "hello", "world", intern_key,
-                           intern_value);
-  verify_ascii_header_size(&exec_ctx, "hello",
-                           "worldxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", intern_key,
-                           intern_value);
-  verify_ascii_header_size(&exec_ctx, ":scheme", "http", intern_key,
-                           intern_value);
+  verify_ascii_header_size("hello", "world", intern_key, intern_value);
+  verify_ascii_header_size("hello", "worldxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
+                           intern_key, intern_value);
+  verify_ascii_header_size(":scheme", "http", intern_key, intern_value);
 
   for (uint8_t i = 0; i < BUFFER_SIZE; i++) {
-    verify_binary_header_size(&exec_ctx, "hello-bin", binary_value, i,
-                              intern_key, intern_value);
+    verify_binary_header_size("hello-bin", binary_value, i, intern_key,
+                              intern_value);
   }
 
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
 }
 
@@ -362,13 +346,13 @@ static void test_copied_static_metadata(bool dup_key, bool dup_value) {
   gpr_log(GPR_INFO, "test_static_metadata: dup_key=%d dup_value=%d", dup_key,
           dup_value);
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   for (size_t i = 0; i < GRPC_STATIC_MDELEM_COUNT; i++) {
     grpc_mdelem p = GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[i],
                                      GRPC_MDELEM_STORAGE_STATIC);
     grpc_mdelem q =
-        grpc_mdelem_from_slices(&exec_ctx, maybe_dup(GRPC_MDKEY(p), dup_key),
+        grpc_mdelem_from_slices(maybe_dup(GRPC_MDKEY(p), dup_key),
                                 maybe_dup(GRPC_MDVALUE(p), dup_value));
     GPR_ASSERT(grpc_mdelem_eq(p, q));
     if (dup_key || dup_value) {
@@ -376,16 +360,16 @@ static void test_copied_static_metadata(bool dup_key, bool dup_value) {
     } else {
       GPR_ASSERT(p.payload == q.payload);
     }
-    GRPC_MDELEM_UNREF(&exec_ctx, p);
-    GRPC_MDELEM_UNREF(&exec_ctx, q);
+    GRPC_MDELEM_UNREF(p);
+    GRPC_MDELEM_UNREF(q);
   }
 
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_no_op();
   for (int k = 0; k <= 1; k++) {
     for (int v = 0; v <= 1; v++) {
@@ -400,5 +384,6 @@ int main(int argc, char** argv) {
   test_create_many_persistant_metadata();
   test_things_stick_around();
   test_user_data_works();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/transport/status_conversion_test.cc b/test/core/transport/status_conversion_test.cc
index 7af5d12cb7..1ed6ccfba6 100644
--- a/test/core/transport/status_conversion_test.cc
+++ b/test/core/transport/status_conversion_test.cc
@@ -22,12 +22,11 @@
 
 #define GRPC_STATUS_TO_HTTP2_ERROR(a, b) \
   GPR_ASSERT(grpc_status_to_http2_error(a) == (b))
-#define HTTP2_ERROR_TO_GRPC_STATUS(a, deadline, b)                           \
-  do {                                                                       \
-    grpc_exec_ctx my_exec_ctx = GRPC_EXEC_CTX_INIT;                          \
-    GPR_ASSERT(grpc_http2_error_to_grpc_status(&my_exec_ctx, a, deadline) == \
-               (b));                                                         \
-    grpc_exec_ctx_finish(&my_exec_ctx);                                      \
+#define HTTP2_ERROR_TO_GRPC_STATUS(a, deadline, b)                   \
+  do {                                                               \
+    grpc_core::ExecCtx exec_ctx;                                     \
+    GPR_ASSERT(grpc_http2_error_to_grpc_status(a, deadline) == (b)); \
+                                                                     \
   } while (0)
 #define GRPC_STATUS_TO_HTTP2_STATUS(a, b) \
   GPR_ASSERT(grpc_status_to_http2_status(a) == (b))
diff --git a/test/core/transport/stream_owned_slice_test.cc b/test/core/transport/stream_owned_slice_test.cc
index e82df2117d..7831f67a04 100644
--- a/test/core/transport/stream_owned_slice_test.cc
+++ b/test/core/transport/stream_owned_slice_test.cc
@@ -20,12 +20,14 @@
 
 #include "test/core/util/test_config.h"
 
+#include <grpc/grpc.h>
 #include <grpc/support/log.h>
 
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void do_nothing(void* arg, grpc_error* error) {}
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   uint8_t buffer[] = "abc123";
   grpc_stream_refcount r;
@@ -39,5 +41,6 @@ int main(int argc, char** argv) {
   grpc_slice_unref(slice);
   GPR_ASSERT(r.refs.count == 1);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/util/mock_endpoint.cc b/test/core/util/mock_endpoint.cc
index d9545efa49..4b35a581b1 100644
--- a/test/core/util/mock_endpoint.cc
+++ b/test/core/util/mock_endpoint.cc
@@ -40,13 +40,13 @@ typedef struct grpc_mock_endpoint {
   grpc_resource_user* resource_user;
 } grpc_mock_endpoint;
 
-static void me_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                    grpc_slice_buffer* slices, grpc_closure* cb) {
+static void me_read(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                    grpc_closure* cb) {
   grpc_mock_endpoint* m = (grpc_mock_endpoint*)ep;
   gpr_mu_lock(&m->mu);
   if (m->read_buffer.count > 0) {
     grpc_slice_buffer_swap(&m->read_buffer, slices);
-    GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_NONE);
   } else {
     m->on_read = cb;
     m->on_read_out = slices;
@@ -54,44 +54,41 @@ static void me_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
   gpr_mu_unlock(&m->mu);
 }
 
-static void me_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                     grpc_slice_buffer* slices, grpc_closure* cb) {
+static void me_write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                     grpc_closure* cb) {
   grpc_mock_endpoint* m = (grpc_mock_endpoint*)ep;
   for (size_t i = 0; i < slices->count; i++) {
     m->on_write(slices->slices[i]);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_NONE);
 }
 
-static void me_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                              grpc_pollset* pollset) {}
+static void me_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {}
 
-static void me_add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+static void me_add_to_pollset_set(grpc_endpoint* ep,
                                   grpc_pollset_set* pollset) {}
 
-static void me_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                       grpc_endpoint* ep,
+static void me_delete_from_pollset_set(grpc_endpoint* ep,
                                        grpc_pollset_set* pollset) {}
 
-static void me_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                        grpc_error* why) {
+static void me_shutdown(grpc_endpoint* ep, grpc_error* why) {
   grpc_mock_endpoint* m = (grpc_mock_endpoint*)ep;
   gpr_mu_lock(&m->mu);
   if (m->on_read) {
-    GRPC_CLOSURE_SCHED(exec_ctx, m->on_read,
+    GRPC_CLOSURE_SCHED(m->on_read,
                        GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                            "Endpoint Shutdown", &why, 1));
     m->on_read = nullptr;
   }
   gpr_mu_unlock(&m->mu);
-  grpc_resource_user_shutdown(exec_ctx, m->resource_user);
+  grpc_resource_user_shutdown(m->resource_user);
   GRPC_ERROR_UNREF(why);
 }
 
-static void me_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+static void me_destroy(grpc_endpoint* ep) {
   grpc_mock_endpoint* m = (grpc_mock_endpoint*)ep;
   grpc_slice_buffer_destroy(&m->read_buffer);
-  grpc_resource_user_unref(exec_ctx, m->resource_user);
+  grpc_resource_user_unref(m->resource_user);
   gpr_free(m);
 }
 
@@ -134,13 +131,12 @@ grpc_endpoint* grpc_mock_endpoint_create(void (*on_write)(grpc_slice slice),
   return &m->base;
 }
 
-void grpc_mock_endpoint_put_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                 grpc_slice slice) {
+void grpc_mock_endpoint_put_read(grpc_endpoint* ep, grpc_slice slice) {
   grpc_mock_endpoint* m = (grpc_mock_endpoint*)ep;
   gpr_mu_lock(&m->mu);
   if (m->on_read != nullptr) {
     grpc_slice_buffer_add(m->on_read_out, slice);
-    GRPC_CLOSURE_SCHED(exec_ctx, m->on_read, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(m->on_read, GRPC_ERROR_NONE);
     m->on_read = nullptr;
   } else {
     grpc_slice_buffer_add(&m->read_buffer, slice);
diff --git a/test/core/util/mock_endpoint.h b/test/core/util/mock_endpoint.h
index ccabaf7c3b..6521d3e8e8 100644
--- a/test/core/util/mock_endpoint.h
+++ b/test/core/util/mock_endpoint.h
@@ -23,8 +23,7 @@
 
 grpc_endpoint* grpc_mock_endpoint_create(void (*on_write)(grpc_slice slice),
                                          grpc_resource_quota* resource_quota);
-void grpc_mock_endpoint_put_read(grpc_exec_ctx* exec_ctx,
-                                 grpc_endpoint* mock_endpoint,
+void grpc_mock_endpoint_put_read(grpc_endpoint* mock_endpoint,
                                  grpc_slice slice);
 
 #endif
diff --git a/test/core/util/one_corpus_entry_fuzzer.cc b/test/core/util/one_corpus_entry_fuzzer.cc
index c0b67da1e2..c745eb5dc6 100644
--- a/test/core/util/one_corpus_entry_fuzzer.cc
+++ b/test/core/util/one_corpus_entry_fuzzer.cc
@@ -18,7 +18,10 @@
 
 #include <stdbool.h>
 
+#include <grpc/grpc.h>
+
 #include <grpc/support/log.h>
+#include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/iomgr/load_file.h"
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
@@ -30,10 +33,15 @@ int main(int argc, char** argv) {
   grpc_slice buffer;
   squelch = false;
   leak_check = false;
+  /* TODO(yashkt) Calling grpc_init breaks tests. Fix the tests and replace
+   * grpc_core::ExecCtx::GlobalInit with grpc_init and GlobalShutdown with
+   * grpc_shutdown */
   GPR_ASSERT(
       GRPC_LOG_IF_ERROR("load_file", grpc_load_file(argv[1], 0, &buffer)));
   LLVMFuzzerTestOneInput(GRPC_SLICE_START_PTR(buffer),
                          GRPC_SLICE_LENGTH(buffer));
+  grpc_core::ExecCtx::GlobalInit();
   grpc_slice_unref(buffer);
+  grpc_core::ExecCtx::GlobalShutdown();
   return 0;
 }
diff --git a/test/core/util/passthru_endpoint.cc b/test/core/util/passthru_endpoint.cc
index a9efe22b69..5f127cb960 100644
--- a/test/core/util/passthru_endpoint.cc
+++ b/test/core/util/passthru_endpoint.cc
@@ -49,22 +49,22 @@ struct passthru_endpoint {
   int halves;
   grpc_passthru_endpoint_stats* stats;
   grpc_passthru_endpoint_stats
-      dummy_stats;  // used if constructor stats == NULL
+      dummy_stats;  // used if constructor stats == nullptr
   bool shutdown;
   half client;
   half server;
 };
 
-static void me_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                    grpc_slice_buffer* slices, grpc_closure* cb) {
+static void me_read(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                    grpc_closure* cb) {
   half* m = (half*)ep;
   gpr_mu_lock(&m->parent->mu);
   if (m->parent->shutdown) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx, cb, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Already shutdown"));
+        cb, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Already shutdown"));
   } else if (m->read_buffer.count > 0) {
     grpc_slice_buffer_swap(&m->read_buffer, slices);
-    GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_NONE);
   } else {
     m->on_read = cb;
     m->on_read_out = slices;
@@ -77,8 +77,8 @@ static half* other_half(half* h) {
   return &h->parent->client;
 }
 
-static void me_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                     grpc_slice_buffer* slices, grpc_closure* cb) {
+static void me_write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                     grpc_closure* cb) {
   half* m = other_half((half*)ep);
   gpr_mu_lock(&m->parent->mu);
   grpc_error* error = GRPC_ERROR_NONE;
@@ -89,7 +89,7 @@ static void me_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
     for (size_t i = 0; i < slices->count; i++) {
       grpc_slice_buffer_add(m->on_read_out, grpc_slice_copy(slices->slices[i]));
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, m->on_read, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(m->on_read, GRPC_ERROR_NONE);
     m->on_read = nullptr;
   } else {
     for (size_t i = 0; i < slices->count; i++) {
@@ -98,52 +98,49 @@ static void me_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
     }
   }
   gpr_mu_unlock(&m->parent->mu);
-  GRPC_CLOSURE_SCHED(exec_ctx, cb, error);
+  GRPC_CLOSURE_SCHED(cb, error);
 }
 
-static void me_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                              grpc_pollset* pollset) {}
+static void me_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {}
 
-static void me_add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+static void me_add_to_pollset_set(grpc_endpoint* ep,
                                   grpc_pollset_set* pollset) {}
 
-static void me_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                       grpc_endpoint* ep,
+static void me_delete_from_pollset_set(grpc_endpoint* ep,
                                        grpc_pollset_set* pollset) {}
 
-static void me_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                        grpc_error* why) {
+static void me_shutdown(grpc_endpoint* ep, grpc_error* why) {
   half* m = (half*)ep;
   gpr_mu_lock(&m->parent->mu);
   m->parent->shutdown = true;
   if (m->on_read) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx, m->on_read,
+        m->on_read,
         GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING("Shutdown", &why, 1));
     m->on_read = nullptr;
   }
   m = other_half(m);
   if (m->on_read) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx, m->on_read,
+        m->on_read,
         GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING("Shutdown", &why, 1));
     m->on_read = nullptr;
   }
   gpr_mu_unlock(&m->parent->mu);
-  grpc_resource_user_shutdown(exec_ctx, m->resource_user);
+  grpc_resource_user_shutdown(m->resource_user);
   GRPC_ERROR_UNREF(why);
 }
 
-static void me_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+static void me_destroy(grpc_endpoint* ep) {
   passthru_endpoint* p = ((half*)ep)->parent;
   gpr_mu_lock(&p->mu);
   if (0 == --p->halves) {
     gpr_mu_unlock(&p->mu);
     gpr_mu_destroy(&p->mu);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &p->client.read_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &p->server.read_buffer);
-    grpc_resource_user_unref(exec_ctx, p->client.resource_user);
-    grpc_resource_user_unref(exec_ctx, p->server.resource_user);
+    grpc_slice_buffer_destroy_internal(&p->client.read_buffer);
+    grpc_slice_buffer_destroy_internal(&p->server.read_buffer);
+    grpc_resource_user_unref(p->client.resource_user);
+    grpc_resource_user_unref(p->server.resource_user);
     gpr_free(p);
   } else {
     gpr_mu_unlock(&p->mu);
diff --git a/test/core/util/port_server_client.cc b/test/core/util/port_server_client.cc
index edec50b424..7e76c8063f 100644
--- a/test/core/util/port_server_client.cc
+++ b/test/core/util/port_server_client.cc
@@ -40,22 +40,19 @@ typedef struct freereq {
   int done;
 } freereq;
 
-static void destroy_pops_and_shutdown(grpc_exec_ctx* exec_ctx, void* p,
-                                      grpc_error* error) {
+static void destroy_pops_and_shutdown(void* p, grpc_error* error) {
   grpc_pollset* pollset = grpc_polling_entity_pollset((grpc_polling_entity*)p);
-  grpc_pollset_destroy(exec_ctx, pollset);
+  grpc_pollset_destroy(pollset);
   gpr_free(pollset);
 }
 
-static void freed_port_from_server(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void freed_port_from_server(void* arg, grpc_error* error) {
   freereq* pr = (freereq*)arg;
   gpr_mu_lock(pr->mu);
   pr->done = 1;
   GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&pr->pops),
-                        nullptr));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&pr->pops), nullptr));
   gpr_mu_unlock(pr->mu);
 }
 
@@ -65,7 +62,7 @@ void grpc_free_port_using_server(int port) {
   grpc_httpcli_response rsp;
   freereq pr;
   char* path;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_closure* shutdown_closure;
 
   grpc_init();
@@ -87,30 +84,30 @@ void grpc_free_port_using_server(int port) {
   grpc_httpcli_context_init(&context);
   grpc_resource_quota* resource_quota =
       grpc_resource_quota_create("port_server_client/free");
-  grpc_httpcli_get(&exec_ctx, &context, &pr.pops, resource_quota, &req,
-                   grpc_exec_ctx_now(&exec_ctx) + 30 * GPR_MS_PER_SEC,
+  grpc_httpcli_get(&context, &pr.pops, resource_quota, &req,
+                   grpc_core::ExecCtx::Get()->Now() + 30 * GPR_MS_PER_SEC,
                    GRPC_CLOSURE_CREATE(freed_port_from_server, &pr,
                                        grpc_schedule_on_exec_ctx),
                    &rsp);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_resource_quota_unref_internal(resource_quota);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_mu_lock(pr.mu);
   while (!pr.done) {
     grpc_pollset_worker* worker = nullptr;
     if (!GRPC_LOG_IF_ERROR(
             "pollset_work",
-            grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&pr.pops),
-                              &worker,
-                              grpc_exec_ctx_now(&exec_ctx) + GPR_MS_PER_SEC))) {
+            grpc_pollset_work(
+                grpc_polling_entity_pollset(&pr.pops), &worker,
+                grpc_core::ExecCtx::Get()->Now() + GPR_MS_PER_SEC))) {
       pr.done = 1;
     }
   }
   gpr_mu_unlock(pr.mu);
 
-  grpc_httpcli_context_destroy(&exec_ctx, &context);
-  grpc_pollset_shutdown(&exec_ctx, grpc_polling_entity_pollset(&pr.pops),
+  grpc_httpcli_context_destroy(&context);
+  grpc_pollset_shutdown(grpc_polling_entity_pollset(&pr.pops),
                         shutdown_closure);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   gpr_free(path);
   grpc_http_response_destroy(&rsp);
 
@@ -127,8 +124,7 @@ typedef struct portreq {
   grpc_httpcli_response response;
 } portreq;
 
-static void got_port_from_server(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void got_port_from_server(void* arg, grpc_error* error) {
   size_t i;
   int port = 0;
   portreq* pr = (portreq*)arg;
@@ -154,8 +150,7 @@ static void got_port_from_server(grpc_exec_ctx* exec_ctx, void* arg,
       pr->port = 0;
       GRPC_LOG_IF_ERROR(
           "pollset_kick",
-          grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&pr->pops),
-                            nullptr));
+          grpc_pollset_kick(grpc_polling_entity_pollset(&pr->pops), nullptr));
       gpr_mu_unlock(pr->mu);
       return;
     }
@@ -172,12 +167,12 @@ static void got_port_from_server(grpc_exec_ctx* exec_ctx, void* arg,
     memset(&pr->response, 0, sizeof(pr->response));
     grpc_resource_quota* resource_quota =
         grpc_resource_quota_create("port_server_client/pick_retry");
-    grpc_httpcli_get(exec_ctx, pr->ctx, &pr->pops, resource_quota, &req,
-                     grpc_exec_ctx_now(exec_ctx) + 30 * GPR_MS_PER_SEC,
+    grpc_httpcli_get(pr->ctx, &pr->pops, resource_quota, &req,
+                     grpc_core::ExecCtx::Get()->Now() + 30 * GPR_MS_PER_SEC,
                      GRPC_CLOSURE_CREATE(got_port_from_server, pr,
                                          grpc_schedule_on_exec_ctx),
                      &pr->response);
-    grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+    grpc_resource_quota_unref_internal(resource_quota);
     return;
   }
   GPR_ASSERT(response);
@@ -191,8 +186,7 @@ static void got_port_from_server(grpc_exec_ctx* exec_ctx, void* arg,
   pr->port = port;
   GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&pr->pops),
-                        nullptr));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&pr->pops), nullptr));
   gpr_mu_unlock(pr->mu);
 }
 
@@ -200,53 +194,55 @@ int grpc_pick_port_using_server(void) {
   grpc_httpcli_context context;
   grpc_httpcli_request req;
   portreq pr;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_closure* shutdown_closure;
 
   grpc_init();
+  {
+    grpc_core::ExecCtx exec_ctx;
+    memset(&pr, 0, sizeof(pr));
+    memset(&req, 0, sizeof(req));
+    grpc_pollset* pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
+    grpc_pollset_init(pollset, &pr.mu);
+    pr.pops = grpc_polling_entity_create_from_pollset(pollset);
+    shutdown_closure = GRPC_CLOSURE_CREATE(destroy_pops_and_shutdown, &pr.pops,
+                                           grpc_schedule_on_exec_ctx);
+    pr.port = -1;
+    pr.server = const_cast<char*>(GRPC_PORT_SERVER_ADDRESS);
+    pr.ctx = &context;
+
+    req.host = const_cast<char*>(GRPC_PORT_SERVER_ADDRESS);
+    req.http.path = const_cast<char*>("/get");
 
-  memset(&pr, 0, sizeof(pr));
-  memset(&req, 0, sizeof(req));
-  grpc_pollset* pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
-  grpc_pollset_init(pollset, &pr.mu);
-  pr.pops = grpc_polling_entity_create_from_pollset(pollset);
-  shutdown_closure = GRPC_CLOSURE_CREATE(destroy_pops_and_shutdown, &pr.pops,
-                                         grpc_schedule_on_exec_ctx);
-  pr.port = -1;
-  pr.server = const_cast<char*>(GRPC_PORT_SERVER_ADDRESS);
-  pr.ctx = &context;
+    grpc_httpcli_context_init(&context);
+    grpc_resource_quota* resource_quota =
+        grpc_resource_quota_create("port_server_client/pick");
+    grpc_httpcli_get(&context, &pr.pops, resource_quota, &req,
+                     grpc_core::ExecCtx::Get()->Now() + 30 * GPR_MS_PER_SEC,
+                     GRPC_CLOSURE_CREATE(got_port_from_server, &pr,
+                                         grpc_schedule_on_exec_ctx),
+                     &pr.response);
+    grpc_resource_quota_unref_internal(resource_quota);
+    grpc_core::ExecCtx::Get()->Flush();
+    gpr_mu_lock(pr.mu);
+    while (pr.port == -1) {
+      grpc_pollset_worker* worker = nullptr;
+      if (!GRPC_LOG_IF_ERROR(
+              "pollset_work",
+              grpc_pollset_work(
+                  grpc_polling_entity_pollset(&pr.pops), &worker,
+                  grpc_core::ExecCtx::Get()->Now() + GPR_MS_PER_SEC))) {
+        pr.port = 0;
+      }
+    }
+    gpr_mu_unlock(pr.mu);
 
-  req.host = const_cast<char*>(GRPC_PORT_SERVER_ADDRESS);
-  req.http.path = const_cast<char*>("/get");
+    grpc_http_response_destroy(&pr.response);
+    grpc_httpcli_context_destroy(&context);
+    grpc_pollset_shutdown(grpc_polling_entity_pollset(&pr.pops),
+                          shutdown_closure);
 
-  grpc_httpcli_context_init(&context);
-  grpc_resource_quota* resource_quota =
-      grpc_resource_quota_create("port_server_client/pick");
-  grpc_httpcli_get(
-      &exec_ctx, &context, &pr.pops, resource_quota, &req,
-      grpc_exec_ctx_now(&exec_ctx) + 30 * GPR_MS_PER_SEC,
-      GRPC_CLOSURE_CREATE(got_port_from_server, &pr, grpc_schedule_on_exec_ctx),
-      &pr.response);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
-  grpc_exec_ctx_flush(&exec_ctx);
-  gpr_mu_lock(pr.mu);
-  while (pr.port == -1) {
-    grpc_pollset_worker* worker = nullptr;
-    if (!GRPC_LOG_IF_ERROR(
-            "pollset_work",
-            grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&pr.pops),
-                              &worker,
-                              grpc_exec_ctx_now(&exec_ctx) + GPR_MS_PER_SEC))) {
-      pr.port = 0;
-    }
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  gpr_mu_unlock(pr.mu);
-
-  grpc_http_response_destroy(&pr.response);
-  grpc_httpcli_context_destroy(&exec_ctx, &context);
-  grpc_pollset_shutdown(&exec_ctx, grpc_polling_entity_pollset(&pr.pops),
-                        shutdown_closure);
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
 
   return pr.port;
diff --git a/test/core/util/reconnect_server.cc b/test/core/util/reconnect_server.cc
index 4775b074eb..bcafc4e898 100644
--- a/test/core/util/reconnect_server.cc
+++ b/test/core/util/reconnect_server.cc
@@ -55,7 +55,7 @@ static void pretty_print_backoffs(reconnect_server* server) {
   }
 }
 
-static void on_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
+static void on_connect(void* arg, grpc_endpoint* tcp,
                        grpc_pollset* accepting_pollset,
                        grpc_tcp_server_acceptor* acceptor) {
   gpr_free(acceptor);
@@ -65,9 +65,9 @@ static void on_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
   gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME);
   timestamp_list* new_tail;
   peer = grpc_endpoint_get_peer(tcp);
-  grpc_endpoint_shutdown(exec_ctx, tcp,
+  grpc_endpoint_shutdown(tcp,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Connected"));
-  grpc_endpoint_destroy(exec_ctx, tcp);
+  grpc_endpoint_destroy(tcp);
   if (peer) {
     last_colon = strrchr(peer, ':');
     if (server->peer == nullptr) {
diff --git a/test/core/util/test_tcp_server.cc b/test/core/util/test_tcp_server.cc
index da34da6fd0..5f6af4e707 100644
--- a/test/core/util/test_tcp_server.cc
+++ b/test/core/util/test_tcp_server.cc
@@ -33,8 +33,7 @@
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 
-static void on_server_destroyed(grpc_exec_ctx* exec_ctx, void* data,
-                                grpc_error* error) {
+static void on_server_destroyed(void* data, grpc_error* error) {
   test_tcp_server* server = static_cast<test_tcp_server*>(data);
   server->shutdown = 1;
 }
@@ -56,51 +55,46 @@ void test_tcp_server_start(test_tcp_server* server, int port) {
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   int port_added;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   addr->sin_family = AF_INET;
   addr->sin_port = htons((uint16_t)port);
   memset(&addr->sin_addr, 0, sizeof(addr->sin_addr));
 
-  grpc_error* error = grpc_tcp_server_create(
-      &exec_ctx, &server->shutdown_complete, nullptr, &server->tcp_server);
+  grpc_error* error = grpc_tcp_server_create(&server->shutdown_complete,
+                                             nullptr, &server->tcp_server);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   error =
       grpc_tcp_server_add_port(server->tcp_server, &resolved_addr, &port_added);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(port_added == port);
 
-  grpc_tcp_server_start(&exec_ctx, server->tcp_server, &server->pollset, 1,
+  grpc_tcp_server_start(server->tcp_server, &server->pollset, 1,
                         server->on_connect, server->cb_data);
   gpr_log(GPR_INFO, "test tcp server listening on 0.0.0.0:%d", port);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void test_tcp_server_poll(test_tcp_server* server, int seconds) {
   grpc_pollset_worker* worker = nullptr;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_millis deadline = grpc_timespec_to_millis_round_up(
       grpc_timeout_seconds_to_deadline(seconds));
   gpr_mu_lock(server->mu);
-  GRPC_LOG_IF_ERROR(
-      "pollset_work",
-      grpc_pollset_work(&exec_ctx, server->pollset, &worker, deadline));
+  GRPC_LOG_IF_ERROR("pollset_work",
+                    grpc_pollset_work(server->pollset, &worker, deadline));
   gpr_mu_unlock(server->mu);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
-static void finish_pollset(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(arg));
+static void do_nothing(void* arg, grpc_error* error) {}
+static void finish_pollset(void* arg, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(arg));
 }
 
 void test_tcp_server_destroy(test_tcp_server* server) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_timespec shutdown_deadline;
   grpc_closure do_nothing_cb;
-  grpc_tcp_server_unref(&exec_ctx, server->tcp_server);
+  grpc_tcp_server_unref(server->tcp_server);
   GRPC_CLOSURE_INIT(&do_nothing_cb, do_nothing, nullptr,
                     grpc_schedule_on_exec_ctx);
   shutdown_deadline = gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
@@ -109,10 +103,10 @@ void test_tcp_server_destroy(test_tcp_server* server) {
          gpr_time_cmp(gpr_now(GPR_CLOCK_MONOTONIC), shutdown_deadline) < 0) {
     test_tcp_server_poll(server, 1);
   }
-  grpc_pollset_shutdown(&exec_ctx, server->pollset,
+  grpc_pollset_shutdown(server->pollset,
                         GRPC_CLOSURE_CREATE(finish_pollset, server->pollset,
                                             grpc_schedule_on_exec_ctx));
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(server->pollset);
   grpc_shutdown();
 }
diff --git a/test/core/util/trickle_endpoint.cc b/test/core/util/trickle_endpoint.cc
index 4544fb7f49..f95ed62463 100644
--- a/test/core/util/trickle_endpoint.cc
+++ b/test/core/util/trickle_endpoint.cc
@@ -45,24 +45,23 @@ typedef struct {
   grpc_closure* write_cb;
 } trickle_endpoint;
 
-static void te_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                    grpc_slice_buffer* slices, grpc_closure* cb) {
+static void te_read(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                    grpc_closure* cb) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
-  grpc_endpoint_read(exec_ctx, te->wrapped, slices, cb);
+  grpc_endpoint_read(te->wrapped, slices, cb);
 }
 
-static void maybe_call_write_cb_locked(grpc_exec_ctx* exec_ctx,
-                                       trickle_endpoint* te) {
+static void maybe_call_write_cb_locked(trickle_endpoint* te) {
   if (te->write_cb != nullptr &&
       (te->error != GRPC_ERROR_NONE ||
        te->write_buffer.length <= WRITE_BUFFER_SIZE)) {
-    GRPC_CLOSURE_SCHED(exec_ctx, te->write_cb, GRPC_ERROR_REF(te->error));
+    GRPC_CLOSURE_SCHED(te->write_cb, GRPC_ERROR_REF(te->error));
     te->write_cb = nullptr;
   }
 }
 
-static void te_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                     grpc_slice_buffer* slices, grpc_closure* cb) {
+static void te_write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                     grpc_closure* cb) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
   gpr_mu_lock(&te->mu);
   GPR_ASSERT(te->write_cb == nullptr);
@@ -74,47 +73,44 @@ static void te_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
                           grpc_slice_copy(slices->slices[i]));
   }
   te->write_cb = cb;
-  maybe_call_write_cb_locked(exec_ctx, te);
+  maybe_call_write_cb_locked(te);
   gpr_mu_unlock(&te->mu);
 }
 
-static void te_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                              grpc_pollset* pollset) {
+static void te_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
-  grpc_endpoint_add_to_pollset(exec_ctx, te->wrapped, pollset);
+  grpc_endpoint_add_to_pollset(te->wrapped, pollset);
 }
 
-static void te_add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+static void te_add_to_pollset_set(grpc_endpoint* ep,
                                   grpc_pollset_set* pollset_set) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
-  grpc_endpoint_add_to_pollset_set(exec_ctx, te->wrapped, pollset_set);
+  grpc_endpoint_add_to_pollset_set(te->wrapped, pollset_set);
 }
 
-static void te_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                       grpc_endpoint* ep,
+static void te_delete_from_pollset_set(grpc_endpoint* ep,
                                        grpc_pollset_set* pollset_set) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
-  grpc_endpoint_delete_from_pollset_set(exec_ctx, te->wrapped, pollset_set);
+  grpc_endpoint_delete_from_pollset_set(te->wrapped, pollset_set);
 }
 
-static void te_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                        grpc_error* why) {
+static void te_shutdown(grpc_endpoint* ep, grpc_error* why) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
   gpr_mu_lock(&te->mu);
   if (te->error == GRPC_ERROR_NONE) {
     te->error = GRPC_ERROR_REF(why);
   }
-  maybe_call_write_cb_locked(exec_ctx, te);
+  maybe_call_write_cb_locked(te);
   gpr_mu_unlock(&te->mu);
-  grpc_endpoint_shutdown(exec_ctx, te->wrapped, why);
+  grpc_endpoint_shutdown(te->wrapped, why);
 }
 
-static void te_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+static void te_destroy(grpc_endpoint* ep) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
-  grpc_endpoint_destroy(exec_ctx, te->wrapped);
+  grpc_endpoint_destroy(te->wrapped);
   gpr_mu_destroy(&te->mu);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &te->write_buffer);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &te->writing_buffer);
+  grpc_slice_buffer_destroy_internal(&te->write_buffer);
+  grpc_slice_buffer_destroy_internal(&te->writing_buffer);
   GRPC_ERROR_UNREF(te->error);
   gpr_free(te);
 }
@@ -134,8 +130,7 @@ static int te_get_fd(grpc_endpoint* ep) {
   return grpc_endpoint_get_fd(te->wrapped);
 }
 
-static void te_finish_write(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void te_finish_write(void* arg, grpc_error* error) {
   trickle_endpoint* te = (trickle_endpoint*)arg;
   gpr_mu_lock(&te->mu);
   te->writing = false;
@@ -173,8 +168,7 @@ static double ts2dbl(gpr_timespec s) {
   return (double)s.tv_sec + 1e-9 * (double)s.tv_nsec;
 }
 
-size_t grpc_trickle_endpoint_trickle(grpc_exec_ctx* exec_ctx,
-                                     grpc_endpoint* ep) {
+size_t grpc_trickle_endpoint_trickle(grpc_endpoint* ep) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
   gpr_mu_lock(&te->mu);
   if (!te->writing && te->write_buffer.length > 0) {
@@ -189,9 +183,9 @@ size_t grpc_trickle_endpoint_trickle(grpc_exec_ctx* exec_ctx,
       te->writing = true;
       te->last_write = now;
       grpc_endpoint_write(
-          exec_ctx, te->wrapped, &te->writing_buffer,
+          te->wrapped, &te->writing_buffer,
           GRPC_CLOSURE_CREATE(te_finish_write, te, grpc_schedule_on_exec_ctx));
-      maybe_call_write_cb_locked(exec_ctx, te);
+      maybe_call_write_cb_locked(te);
     }
   }
   size_t backlog = te->write_buffer.length;
diff --git a/test/core/util/trickle_endpoint.h b/test/core/util/trickle_endpoint.h
index 11c113bda8..cd07de905a 100644
--- a/test/core/util/trickle_endpoint.h
+++ b/test/core/util/trickle_endpoint.h
@@ -25,8 +25,7 @@ grpc_endpoint* grpc_trickle_endpoint_create(grpc_endpoint* wrap,
                                             double bytes_per_second);
 
 /* Allow up to \a bytes through the endpoint. Returns the new backlog. */
-size_t grpc_trickle_endpoint_trickle(grpc_exec_ctx* exec_ctx,
-                                     grpc_endpoint* endpoint);
+size_t grpc_trickle_endpoint_trickle(grpc_endpoint* endpoint);
 
 size_t grpc_trickle_get_backlog(grpc_endpoint* endpoint);
 
diff --git a/test/cpp/client/client_channel_stress_test.cc b/test/cpp/client/client_channel_stress_test.cc
index 0954b28df0..e829d5278b 100644
--- a/test/cpp/client/client_channel_stress_test.cc
+++ b/test/cpp/client/client_channel_stress_test.cc
@@ -212,13 +212,13 @@ class ClientChannelStressTest {
   };
 
   void SetNextResolution(const std::vector<AddressData>& address_data) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_lb_addresses* addresses =
         grpc_lb_addresses_create(address_data.size(), nullptr);
     for (size_t i = 0; i < address_data.size(); ++i) {
       char* lb_uri_str;
       gpr_asprintf(&lb_uri_str, "ipv4:127.0.0.1:%d", address_data[i].port);
-      grpc_uri* lb_uri = grpc_uri_parse(&exec_ctx, lb_uri_str, true);
+      grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true);
       GPR_ASSERT(lb_uri != nullptr);
       grpc_lb_addresses_set_address_from_uri(
           addresses, i, lb_uri, address_data[i].is_balancer,
@@ -228,10 +228,9 @@ class ClientChannelStressTest {
     }
     grpc_arg fake_addresses = grpc_lb_addresses_create_channel_arg(addresses);
     grpc_channel_args fake_result = {1, &fake_addresses};
-    grpc_fake_resolver_response_generator_set_response(
-        &exec_ctx, response_generator_, &fake_result);
-    grpc_lb_addresses_destroy(&exec_ctx, addresses);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_fake_resolver_response_generator_set_response(response_generator_,
+                                                       &fake_result);
+    grpc_lb_addresses_destroy(addresses);
   }
 
   void KeepSendingRequests() {
diff --git a/test/cpp/common/channel_arguments_test.cc b/test/cpp/common/channel_arguments_test.cc
index d6ed2e5aa2..f330c01281 100644
--- a/test/cpp/common/channel_arguments_test.cc
+++ b/test/cpp/common/channel_arguments_test.cc
@@ -249,5 +249,8 @@ TEST_F(ChannelArgumentsTest, SetUserAgentPrefix) {
 
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
+  grpc_init();
+  int ret = RUN_ALL_TESTS();
+  grpc_shutdown();
+  return ret;
 }
diff --git a/test/cpp/common/channel_filter_test.cc b/test/cpp/common/channel_filter_test.cc
index 638518107b..7bdd53f9e7 100644
--- a/test/cpp/common/channel_filter_test.cc
+++ b/test/cpp/common/channel_filter_test.cc
@@ -28,7 +28,7 @@ class MyChannelData : public ChannelData {
  public:
   MyChannelData() {}
 
-  grpc_error* Init(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+  grpc_error* Init(grpc_channel_element* elem,
                    grpc_channel_element_args* args) override {
     (void)args->channel_args;  // Make sure field is available.
     return GRPC_ERROR_NONE;
@@ -39,7 +39,7 @@ class MyCallData : public CallData {
  public:
   MyCallData() {}
 
-  grpc_error* Init(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+  grpc_error* Init(grpc_call_element* elem,
                    const grpc_call_element_args* args) override {
     (void)args->path;  // Make sure field is available.
     return GRPC_ERROR_NONE;
diff --git a/test/cpp/end2end/client_lb_end2end_test.cc b/test/cpp/end2end/client_lb_end2end_test.cc
index 1ce7427040..e1f1f03202 100644
--- a/test/cpp/end2end/client_lb_end2end_test.cc
+++ b/test/cpp/end2end/client_lb_end2end_test.cc
@@ -137,13 +137,13 @@ class ClientLbEnd2endTest : public ::testing::Test {
   }
 
   void SetNextResolution(const std::vector<int>& ports) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_lb_addresses* addresses =
         grpc_lb_addresses_create(ports.size(), nullptr);
     for (size_t i = 0; i < ports.size(); ++i) {
       char* lb_uri_str;
       gpr_asprintf(&lb_uri_str, "ipv4:127.0.0.1:%d", ports[i]);
-      grpc_uri* lb_uri = grpc_uri_parse(&exec_ctx, lb_uri_str, true);
+      grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true);
       GPR_ASSERT(lb_uri != nullptr);
       grpc_lb_addresses_set_address_from_uri(addresses, i, lb_uri,
                                              false /* is balancer */,
@@ -155,11 +155,10 @@ class ClientLbEnd2endTest : public ::testing::Test {
         grpc_lb_addresses_create_channel_arg(addresses);
     grpc_channel_args* fake_result =
         grpc_channel_args_copy_and_add(nullptr, &fake_addresses, 1);
-    grpc_fake_resolver_response_generator_set_response(
-        &exec_ctx, response_generator_, fake_result);
-    grpc_channel_args_destroy(&exec_ctx, fake_result);
-    grpc_lb_addresses_destroy(&exec_ctx, addresses);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_fake_resolver_response_generator_set_response(response_generator_,
+                                                       fake_result);
+    grpc_channel_args_destroy(fake_result);
+    grpc_lb_addresses_destroy(addresses);
   }
 
   std::vector<int> GetServersPorts() {
@@ -190,7 +189,7 @@ class ClientLbEnd2endTest : public ::testing::Test {
     stub_ = grpc::testing::EchoTestService::NewStub(channel_);
   }
 
-  Status SendRpc(EchoResponse* response = nullptr) {
+  bool SendRpc(EchoResponse* response = nullptr) {
     const bool local_response = (response == nullptr);
     if (local_response) response = new EchoResponse;
     EchoRequest request;
@@ -198,19 +197,19 @@ class ClientLbEnd2endTest : public ::testing::Test {
     ClientContext context;
     Status status = stub_->Echo(&context, request, response);
     if (local_response) delete response;
-    return status;
+    return status.ok();
   }
 
   void CheckRpcSendOk() {
     EchoResponse response;
-    const Status status = SendRpc(&response);
-    EXPECT_TRUE(status.ok());
+    const bool success = SendRpc(&response);
+    EXPECT_TRUE(success);
     EXPECT_EQ(response.message(), kRequestMessage_);
   }
 
   void CheckRpcSendFailure() {
-    const Status status = SendRpc();
-    EXPECT_FALSE(status.ok());
+    const bool success = SendRpc();
+    EXPECT_FALSE(success);
   }
 
   struct ServerData {
@@ -669,15 +668,28 @@ TEST_F(ClientLbEnd2endTest, RoundRobinReresolve) {
     CheckRpcSendOk();
   }
   // Kill all servers
+  gpr_log(GPR_INFO, "****** ABOUT TO KILL SERVERS *******");
   for (size_t i = 0; i < servers_.size(); ++i) {
     servers_[i]->Shutdown(false);
   }
-  // Client request should fail.
-  CheckRpcSendFailure();
+  gpr_log(GPR_INFO, "****** SERVERS KILLED *******");
+  gpr_log(GPR_INFO, "****** SENDING DOOMED REQUESTS *******");
+  // Client requests should fail. Send enough to tickle all subchannels.
+  for (size_t i = 0; i < servers_.size(); ++i) CheckRpcSendFailure();
+  gpr_log(GPR_INFO, "****** DOOMED REQUESTS SENT *******");
   // Bring servers back up on the same port (we aren't recreating the channel).
+  gpr_log(GPR_INFO, "****** RESTARTING SERVERS *******");
   StartServers(kNumServers, ports);
-  // Client request should succeed.
-  CheckRpcSendOk();
+  gpr_log(GPR_INFO, "****** SERVERS RESTARTED *******");
+  gpr_log(GPR_INFO, "****** SENDING REQUEST TO SUCCEED *******");
+  // Client request should eventually (but still fairly soon) succeed.
+  const gpr_timespec deadline = grpc_timeout_seconds_to_deadline(5);
+  gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
+  while (gpr_time_cmp(deadline, now) > 0) {
+    if (SendRpc()) break;
+    now = gpr_now(GPR_CLOCK_MONOTONIC);
+  }
+  GPR_ASSERT(gpr_time_cmp(deadline, now) > 0);
 }
 
 }  // namespace
diff --git a/test/cpp/end2end/end2end_test.cc b/test/cpp/end2end/end2end_test.cc
index c71034bbe8..4c8dfe0f40 100644
--- a/test/cpp/end2end/end2end_test.cc
+++ b/test/cpp/end2end/end2end_test.cc
@@ -741,6 +741,7 @@ TEST_P(End2endTest, RequestStreamOneRequest) {
   Status s = stream->Finish();
   EXPECT_EQ(response.message(), request.message());
   EXPECT_TRUE(s.ok());
+  EXPECT_TRUE(context.debug_error_string().empty());
 }
 
 TEST_P(End2endTest, RequestStreamOneRequestWithCoalescingApi) {
@@ -1258,6 +1259,13 @@ TEST_P(End2endTest, ExpectErrorTest) {
     EXPECT_EQ(iter->code(), s.error_code());
     EXPECT_EQ(iter->error_message(), s.error_message());
     EXPECT_EQ(iter->binary_error_details(), s.error_details());
+    EXPECT_TRUE(context.debug_error_string().find("created") !=
+                std::string::npos);
+    EXPECT_TRUE(context.debug_error_string().find("file") != std::string::npos);
+    EXPECT_TRUE(context.debug_error_string().find("line") != std::string::npos);
+    EXPECT_TRUE(context.debug_error_string().find("status") !=
+                std::string::npos);
+    EXPECT_TRUE(context.debug_error_string().find("13") != std::string::npos);
   }
 }
 
@@ -1300,12 +1308,19 @@ TEST_P(ProxyEnd2endTest, RpcDeadlineExpires) {
   EchoResponse response;
   request.set_message("Hello");
   request.mutable_param()->set_skip_cancelled_check(true);
-  // Let server sleep for 2 ms first to guarantee expiry
-  request.mutable_param()->set_server_sleep_us(2 * 1000);
+  // Let server sleep for 40 ms first to guarantee expiry.
+  // 40 ms might seem a bit extreme but the timer manager would have been just
+  // initialized (when ResetStub() was called) and there are some warmup costs
+  // i.e the timer thread many not have even started. There might also be other
+  // delays in the timer manager thread (in acquiring locks, timer data
+  // structure manipulations, starting backup timer threads) that add to the
+  // delays. 40ms is still not enough in some cases but this significantly
+  // reduces the test flakes
+  request.mutable_param()->set_server_sleep_us(40 * 1000);
 
   ClientContext context;
   std::chrono::system_clock::time_point deadline =
-      std::chrono::system_clock::now() + std::chrono::microseconds(10);
+      std::chrono::system_clock::now() + std::chrono::milliseconds(1);
   context.set_deadline(deadline);
   Status s = stub_->Echo(&context, request, &response);
   EXPECT_EQ(StatusCode::DEADLINE_EXCEEDED, s.error_code());
diff --git a/test/cpp/end2end/filter_end2end_test.cc b/test/cpp/end2end/filter_end2end_test.cc
index f260ea0016..c4430379db 100644
--- a/test/cpp/end2end/filter_end2end_test.cc
+++ b/test/cpp/end2end/filter_end2end_test.cc
@@ -100,7 +100,7 @@ int GetCallCounterValue() {
 
 class ChannelDataImpl : public ChannelData {
  public:
-  grpc_error* Init(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+  grpc_error* Init(grpc_channel_element* elem,
                    grpc_channel_element_args* args) {
     IncrementConnectionCounter();
     return GRPC_ERROR_NONE;
@@ -109,13 +109,12 @@ class ChannelDataImpl : public ChannelData {
 
 class CallDataImpl : public CallData {
  public:
-  void StartTransportStreamOpBatch(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem,
+  void StartTransportStreamOpBatch(grpc_call_element* elem,
                                    TransportStreamOpBatch* op) override {
     // Incrementing the counter could be done from Init(), but we want
     // to test that the individual methods are actually called correctly.
     if (op->recv_initial_metadata() != nullptr) IncrementCallCounter();
-    grpc_call_next_op(exec_ctx, elem, op->op());
+    grpc_call_next_op(elem, op->op());
   }
 };
 
diff --git a/test/cpp/end2end/grpclb_end2end_test.cc b/test/cpp/end2end/grpclb_end2end_test.cc
index c15ab88da1..d4ee6b429f 100644
--- a/test/cpp/end2end/grpclb_end2end_test.cc
+++ b/test/cpp/end2end/grpclb_end2end_test.cc
@@ -353,11 +353,6 @@ class GrpclbEnd2endTest : public ::testing::Test {
           "balancer", server_host_, balancers_.back().get()));
     }
     ResetStub();
-    std::vector<AddressData> addresses;
-    for (size_t i = 0; i < balancer_servers_.size(); ++i) {
-      addresses.emplace_back(AddressData{balancer_servers_[i].port_, true, ""});
-    }
-    SetNextResolution(addresses);
   }
 
   void TearDown() override {
@@ -370,6 +365,14 @@ class GrpclbEnd2endTest : public ::testing::Test {
     grpc_fake_resolver_response_generator_unref(response_generator_);
   }
 
+  void SetNextResolutionAllBalancers() {
+    std::vector<AddressData> addresses;
+    for (size_t i = 0; i < balancer_servers_.size(); ++i) {
+      addresses.emplace_back(AddressData{balancer_servers_[i].port_, true, ""});
+    }
+    SetNextResolution(addresses);
+  }
+
   void ResetStub(int fallback_timeout = 0) {
     ChannelArguments args;
     args.SetGrpclbFallbackTimeout(fallback_timeout);
@@ -451,13 +454,13 @@ class GrpclbEnd2endTest : public ::testing::Test {
   };
 
   void SetNextResolution(const std::vector<AddressData>& address_data) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_lb_addresses* addresses =
         grpc_lb_addresses_create(address_data.size(), nullptr);
     for (size_t i = 0; i < address_data.size(); ++i) {
       char* lb_uri_str;
       gpr_asprintf(&lb_uri_str, "ipv4:127.0.0.1:%d", address_data[i].port);
-      grpc_uri* lb_uri = grpc_uri_parse(&exec_ctx, lb_uri_str, true);
+      grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true);
       GPR_ASSERT(lb_uri != nullptr);
       grpc_lb_addresses_set_address_from_uri(
           addresses, i, lb_uri, address_data[i].is_balancer,
@@ -467,10 +470,9 @@ class GrpclbEnd2endTest : public ::testing::Test {
     }
     grpc_arg fake_addresses = grpc_lb_addresses_create_channel_arg(addresses);
     grpc_channel_args fake_result = {1, &fake_addresses};
-    grpc_fake_resolver_response_generator_set_response(
-        &exec_ctx, response_generator_, &fake_result);
-    grpc_lb_addresses_destroy(&exec_ctx, addresses);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_fake_resolver_response_generator_set_response(response_generator_,
+                                                       &fake_result);
+    grpc_lb_addresses_destroy(addresses);
   }
 
   const std::vector<int> GetBackendPorts(const size_t start_index = 0) const {
@@ -581,6 +583,7 @@ class SingleBalancerTest : public GrpclbEnd2endTest {
 };
 
 TEST_F(SingleBalancerTest, Vanilla) {
+  SetNextResolutionAllBalancers();
   const size_t kNumRpcsPerAddress = 100;
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
@@ -608,6 +611,7 @@ TEST_F(SingleBalancerTest, Vanilla) {
 }
 
 TEST_F(SingleBalancerTest, InitiallyEmptyServerlist) {
+  SetNextResolutionAllBalancers();
   const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
   const int kCallDeadlineMs = 1000 * grpc_test_slowdown_factor();
 
@@ -645,6 +649,7 @@ TEST_F(SingleBalancerTest, InitiallyEmptyServerlist) {
 }
 
 TEST_F(SingleBalancerTest, Fallback) {
+  SetNextResolutionAllBalancers();
   const int kFallbackTimeoutMs = 200 * grpc_test_slowdown_factor();
   const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
   const size_t kNumBackendInResolution = backends_.size() / 2;
@@ -711,6 +716,7 @@ TEST_F(SingleBalancerTest, Fallback) {
 }
 
 TEST_F(SingleBalancerTest, FallbackUpdate) {
+  SetNextResolutionAllBalancers();
   const int kFallbackTimeoutMs = 200 * grpc_test_slowdown_factor();
   const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
   const size_t kNumBackendInResolution = backends_.size() / 3;
@@ -818,6 +824,7 @@ TEST_F(SingleBalancerTest, FallbackUpdate) {
 }
 
 TEST_F(SingleBalancerTest, BackendsRestart) {
+  SetNextResolutionAllBalancers();
   const size_t kNumRpcsPerAddress = 100;
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
@@ -857,6 +864,7 @@ class UpdatesTest : public GrpclbEnd2endTest {
 };
 
 TEST_F(UpdatesTest, UpdateBalancers) {
+  SetNextResolutionAllBalancers();
   const std::vector<int> first_backend{GetBackendPorts()[0]};
   const std::vector<int> second_backend{GetBackendPorts()[1]};
   ScheduleResponseForBalancer(
@@ -919,6 +927,7 @@ TEST_F(UpdatesTest, UpdateBalancers) {
 // verify that the LB channel inside grpclb keeps the initial connection (which
 // by definition is also present in the update).
 TEST_F(UpdatesTest, UpdateBalancersRepeated) {
+  SetNextResolutionAllBalancers();
   const std::vector<int> first_backend{GetBackendPorts()[0]};
   const std::vector<int> second_backend{GetBackendPorts()[0]};
 
@@ -989,6 +998,9 @@ TEST_F(UpdatesTest, UpdateBalancersRepeated) {
 }
 
 TEST_F(UpdatesTest, UpdateBalancersDeadUpdate) {
+  std::vector<AddressData> addresses;
+  addresses.emplace_back(AddressData{balancer_servers_[0].port_, true, ""});
+  SetNextResolution(addresses);
   const std::vector<int> first_backend{GetBackendPorts()[0]};
   const std::vector<int> second_backend{GetBackendPorts()[1]};
 
@@ -1030,7 +1042,7 @@ TEST_F(UpdatesTest, UpdateBalancersDeadUpdate) {
   EXPECT_EQ(0U, balancer_servers_[2].service_->request_count());
   EXPECT_EQ(0U, balancer_servers_[2].service_->response_count());
 
-  std::vector<AddressData> addresses;
+  addresses.clear();
   addresses.emplace_back(AddressData{balancer_servers_[1].port_, true, ""});
   gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 ==========");
   SetNextResolution(addresses);
@@ -1055,8 +1067,14 @@ TEST_F(UpdatesTest, UpdateBalancersDeadUpdate) {
   balancers_[2]->NotifyDoneWithServerlists();
   EXPECT_EQ(1U, balancer_servers_[0].service_->request_count());
   EXPECT_EQ(1U, balancer_servers_[0].service_->response_count());
-  EXPECT_EQ(1U, balancer_servers_[1].service_->request_count());
-  EXPECT_EQ(1U, balancer_servers_[1].service_->response_count());
+  // The second balancer, published as part of the first update, may end up
+  // getting two requests (that is, 1 <= #req <= 2) if the LB call retry timer
+  // firing races with the arrival of the update containing the second
+  // balancer.
+  EXPECT_GE(balancer_servers_[1].service_->request_count(), 1U);
+  EXPECT_GE(balancer_servers_[1].service_->response_count(), 1U);
+  EXPECT_LE(balancer_servers_[1].service_->request_count(), 2U);
+  EXPECT_LE(balancer_servers_[1].service_->response_count(), 2U);
   EXPECT_EQ(0U, balancer_servers_[2].service_->request_count());
   EXPECT_EQ(0U, balancer_servers_[2].service_->response_count());
   // Check LB policy name for the channel.
@@ -1064,6 +1082,7 @@ TEST_F(UpdatesTest, UpdateBalancersDeadUpdate) {
 }
 
 TEST_F(SingleBalancerTest, Drop) {
+  SetNextResolutionAllBalancers();
   const size_t kNumRpcsPerAddress = 100;
   const int num_of_drop_by_rate_limiting_addresses = 1;
   const int num_of_drop_by_load_balancing_addresses = 2;
@@ -1107,6 +1126,7 @@ TEST_F(SingleBalancerTest, Drop) {
 }
 
 TEST_F(SingleBalancerTest, DropAllFirst) {
+  SetNextResolutionAllBalancers();
   // All registered addresses are marked as "drop".
   const int num_of_drop_by_rate_limiting_addresses = 1;
   const int num_of_drop_by_load_balancing_addresses = 1;
@@ -1122,6 +1142,7 @@ TEST_F(SingleBalancerTest, DropAllFirst) {
 }
 
 TEST_F(SingleBalancerTest, DropAll) {
+  SetNextResolutionAllBalancers();
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
       0);
@@ -1152,6 +1173,7 @@ class SingleBalancerWithClientLoadReportingTest : public GrpclbEnd2endTest {
 };
 
 TEST_F(SingleBalancerWithClientLoadReportingTest, Vanilla) {
+  SetNextResolutionAllBalancers();
   const size_t kNumRpcsPerAddress = 100;
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
@@ -1186,6 +1208,7 @@ TEST_F(SingleBalancerWithClientLoadReportingTest, Vanilla) {
 }
 
 TEST_F(SingleBalancerWithClientLoadReportingTest, Drop) {
+  SetNextResolutionAllBalancers();
   const size_t kNumRpcsPerAddress = 3;
   const int num_of_drop_by_rate_limiting_addresses = 2;
   const int num_of_drop_by_load_balancing_addresses = 1;
diff --git a/test/cpp/grpclb/grpclb_api_test.cc b/test/cpp/grpclb/grpclb_api_test.cc
index 7b62080b49..1f2ef0c2de 100644
--- a/test/cpp/grpclb/grpclb_api_test.cc
+++ b/test/cpp/grpclb/grpclb_api_test.cc
@@ -17,6 +17,7 @@
  */
 
 #include <grpc++/impl/codegen/config.h>
+#include <grpc/grpc.h>
 #include <gtest/gtest.h>
 
 #include "src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h"
@@ -98,9 +99,6 @@ TEST_F(GrpclbTest, ParseResponseServerList) {
   server->set_port(54321);
   server->set_load_balance_token("load_balancing");
   server->set_drop(true);
-  auto* expiration_interval = serverlist->mutable_expiration_interval();
-  expiration_interval->set_seconds(888);
-  expiration_interval->set_nanos(999);
 
   const grpc::string encoded_response = response.SerializeAsString();
   const grpc_slice encoded_slice = grpc_slice_from_copied_buffer(
@@ -121,11 +119,6 @@ TEST_F(GrpclbTest, ParseResponseServerList) {
   EXPECT_STREQ(c_serverlist->servers[1]->load_balance_token, "load_balancing");
   EXPECT_TRUE(c_serverlist->servers[1]->drop);
 
-  EXPECT_TRUE(c_serverlist->expiration_interval.has_seconds);
-  EXPECT_EQ(c_serverlist->expiration_interval.seconds, 888);
-  EXPECT_TRUE(c_serverlist->expiration_interval.has_nanos);
-  EXPECT_EQ(c_serverlist->expiration_interval.nanos, 999);
-
   grpc_slice_unref(encoded_slice);
   grpc_grpclb_destroy_serverlist(c_serverlist);
 }
@@ -135,5 +128,8 @@ TEST_F(GrpclbTest, ParseResponseServerList) {
 
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
+  grpc_init();
+  int ret = RUN_ALL_TESTS();
+  grpc_shutdown();
+  return ret;
 }
diff --git a/test/cpp/grpclb/grpclb_test.cc b/test/cpp/grpclb/grpclb_test.cc
index ca846c72fd..38b65fbc78 100644
--- a/test/cpp/grpclb/grpclb_test.cc
+++ b/test/cpp/grpclb/grpclb_test.cc
@@ -113,10 +113,9 @@ typedef struct test_fixture {
 
 static void* tag(intptr_t t) { return (void*)t; }
 
-static grpc_slice build_response_payload_slice(
-    const char* host, int* ports, size_t nports,
-    int64_t expiration_interval_secs, int32_t expiration_interval_nanos,
-    const char* token_prefix) {
+static grpc_slice build_response_payload_slice(const char* host, int* ports,
+                                               size_t nports,
+                                               const char* token_prefix) {
   // server_list {
   //   servers {
   //     ip_address: <in_addr/6 bytes of an IP>
@@ -128,15 +127,6 @@ static grpc_slice build_response_payload_slice(
   grpc::lb::v1::LoadBalanceResponse response;
   auto* serverlist = response.mutable_server_list();
 
-  if (expiration_interval_secs > 0 || expiration_interval_nanos > 0) {
-    auto* expiration_interval = serverlist->mutable_expiration_interval();
-    if (expiration_interval_secs > 0) {
-      expiration_interval->set_seconds(expiration_interval_secs);
-    }
-    if (expiration_interval_nanos > 0) {
-      expiration_interval->set_nanos(expiration_interval_nanos);
-    }
-  }
   for (size_t i = 0; i < nports; i++) {
     auto* server = serverlist->add_servers();
     // TODO(dgq): test ipv6
@@ -248,13 +238,13 @@ static void start_lb_server(server_fixture* sf, int* ports, size_t nports,
     if (i == 0) {
       // First half of the ports.
       response_payload_slice = build_response_payload_slice(
-          "127.0.0.1", ports, nports / 2, -1, -1, sf->lb_token_prefix);
+          "127.0.0.1", ports, nports / 2, sf->lb_token_prefix);
     } else {
       // Second half of the ports.
       sleep_ms(update_delay_ms);
       response_payload_slice = build_response_payload_slice(
-          "127.0.0.1", ports + (nports / 2), (nports + 1) / 2 /* ceil */, -1,
-          -1, "" /* this half doesn't get to receive an LB token */);
+          "127.0.0.1", ports + (nports / 2), (nports + 1) / 2 /* ceil */,
+          "" /* this half doesn't get to receive an LB token */);
     }
 
     response_payload = grpc_raw_byte_buffer_create(&response_payload_slice, 1);
@@ -562,7 +552,7 @@ static void perform_request(client_fixture* cf) {
 #define BALANCERS_NAME "lb.name"
 static void setup_client(const server_fixture* lb_server,
                          const server_fixture* backends, client_fixture* cf) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   char* expected_target_names = nullptr;
   const char* backends_name = lb_server->servers_hostport;
@@ -574,7 +564,7 @@ static void setup_client(const server_fixture* lb_server,
   grpc_lb_addresses* addresses = grpc_lb_addresses_create(1, nullptr);
   char* lb_uri_str;
   gpr_asprintf(&lb_uri_str, "ipv4:%s", lb_server->servers_hostport);
-  grpc_uri* lb_uri = grpc_uri_parse(&exec_ctx, lb_uri_str, true);
+  grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true);
   GPR_ASSERT(lb_uri != nullptr);
   grpc_lb_addresses_set_address_from_uri(addresses, 0, lb_uri, true,
                                          lb_server->balancer_name, nullptr);
@@ -586,7 +576,7 @@ static void setup_client(const server_fixture* lb_server,
       grpc_lb_addresses_create_channel_arg(addresses);
   grpc_channel_args* fake_result =
       grpc_channel_args_copy_and_add(nullptr, &fake_addresses, 1);
-  grpc_lb_addresses_destroy(&exec_ctx, addresses);
+  grpc_lb_addresses_destroy(addresses);
 
   const grpc_arg new_args[] = {
       grpc_fake_transport_expected_targets_arg(expected_target_names),
@@ -601,13 +591,12 @@ static void setup_client(const server_fixture* lb_server,
       grpc_fake_transport_security_credentials_create();
   cf->client =
       grpc_secure_channel_create(fake_creds, cf->server_uri, args, nullptr);
-  grpc_fake_resolver_response_generator_set_response(
-      &exec_ctx, response_generator, fake_result);
-  grpc_channel_args_destroy(&exec_ctx, fake_result);
-  grpc_channel_credentials_unref(&exec_ctx, fake_creds);
-  grpc_channel_args_destroy(&exec_ctx, args);
+  grpc_fake_resolver_response_generator_set_response(response_generator,
+                                                     fake_result);
+  grpc_channel_args_destroy(fake_result);
+  grpc_channel_credentials_unref(fake_creds);
+  grpc_channel_args_destroy(args);
   grpc_fake_resolver_response_generator_unref(response_generator);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void teardown_client(client_fixture* cf) {
@@ -703,14 +692,15 @@ static test_fixture setup_test_fixture(int lb_server_update_delay_ms) {
       tf.lb_backends[i].lb_token_prefix = "";
     }
     setup_server("127.0.0.1", &tf.lb_backends[i]);
-    gpr_thd_new(&tf.lb_backends[i].tid, fork_backend_server, &tf.lb_backends[i],
-                &options);
+    gpr_thd_new(&tf.lb_backends[i].tid, "grpclb_backend", fork_backend_server,
+                &tf.lb_backends[i], &options);
   }
 
   tf.lb_server.lb_token_prefix = LB_TOKEN_PREFIX;
   tf.lb_server.balancer_name = BALANCERS_NAME;
   setup_server("127.0.0.1", &tf.lb_server);
-  gpr_thd_new(&tf.lb_server.tid, fork_lb_server, &tf.lb_server, &options);
+  gpr_thd_new(&tf.lb_server.tid, "grpclb_server", fork_lb_server, &tf.lb_server,
+              &options);
   setup_client(&tf.lb_server, tf.lb_backends, &tf.client);
   return tf;
 }
diff --git a/test/cpp/microbenchmarks/bm_call_create.cc b/test/cpp/microbenchmarks/bm_call_create.cc
index a45c577320..5c2c38c27d 100644
--- a/test/cpp/microbenchmarks/bm_call_create.cc
+++ b/test/cpp/microbenchmarks/bm_call_create.cc
@@ -311,12 +311,9 @@ static void BM_LameChannelCallCreateCoreSeparateBatch(benchmark::State& state) {
 }
 BENCHMARK(BM_LameChannelCallCreateCoreSeparateBatch);
 
-static void FilterDestroy(grpc_exec_ctx* exec_ctx, void* arg,
-                          grpc_error* error) {
-  gpr_free(arg);
-}
+static void FilterDestroy(void* arg, grpc_error* error) { gpr_free(arg); }
 
-static void DoNothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void DoNothing(void* arg, grpc_error* error) {}
 
 class FakeClientChannelFactory : public grpc_client_channel_factory {
  public:
@@ -324,15 +321,12 @@ class FakeClientChannelFactory : public grpc_client_channel_factory {
 
  private:
   static void NoRef(grpc_client_channel_factory* factory) {}
-  static void NoUnref(grpc_exec_ctx* exec_ctx,
-                      grpc_client_channel_factory* factory) {}
-  static grpc_subchannel* CreateSubchannel(grpc_exec_ctx* exec_ctx,
-                                           grpc_client_channel_factory* factory,
+  static void NoUnref(grpc_client_channel_factory* factory) {}
+  static grpc_subchannel* CreateSubchannel(grpc_client_channel_factory* factory,
                                            const grpc_subchannel_args* args) {
     return nullptr;
   }
-  static grpc_channel* CreateClientChannel(grpc_exec_ctx* exec_ctx,
-                                           grpc_client_channel_factory* factory,
+  static grpc_channel* CreateClientChannel(grpc_client_channel_factory* factory,
                                            const char* target,
                                            grpc_client_channel_type type,
                                            const grpc_channel_args* args) {
@@ -366,36 +360,32 @@ struct Fixture {
 
 namespace dummy_filter {
 
-static void StartTransportStreamOp(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem,
+static void StartTransportStreamOp(grpc_call_element* elem,
                                    grpc_transport_stream_op_batch* op) {}
 
-static void StartTransportOp(grpc_exec_ctx* exec_ctx,
-                             grpc_channel_element* elem,
+static void StartTransportOp(grpc_channel_element* elem,
                              grpc_transport_op* op) {}
 
-static grpc_error* InitCallElem(grpc_exec_ctx* exec_ctx,
-                                grpc_call_element* elem,
+static grpc_error* InitCallElem(grpc_call_element* elem,
                                 const grpc_call_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void SetPollsetOrPollsetSet(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem,
+static void SetPollsetOrPollsetSet(grpc_call_element* elem,
                                    grpc_polling_entity* pollent) {}
 
-static void DestroyCallElem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void DestroyCallElem(grpc_call_element* elem,
                             const grpc_call_final_info* final_info,
                             grpc_closure* then_sched_closure) {}
 
-grpc_error* InitChannelElem(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+grpc_error* InitChannelElem(grpc_channel_element* elem,
                             grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-void DestroyChannelElem(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem) {}
+void DestroyChannelElem(grpc_channel_element* elem) {}
 
-void GetChannelInfo(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+void GetChannelInfo(grpc_channel_element* elem,
                     const grpc_channel_info* channel_info) {}
 
 static const grpc_channel_filter dummy_filter = {StartTransportStreamOp,
@@ -422,41 +412,38 @@ size_t sizeof_stream; /* = sizeof(transport stream) */
 const char* name;
 
 /* implementation of grpc_transport_init_stream */
-int InitStream(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-               grpc_stream* stream, grpc_stream_refcount* refcount,
-               const void* server_data, gpr_arena* arena) {
+int InitStream(grpc_transport* self, grpc_stream* stream,
+               grpc_stream_refcount* refcount, const void* server_data,
+               gpr_arena* arena) {
   return 0;
 }
 
 /* implementation of grpc_transport_set_pollset */
-void SetPollset(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                grpc_stream* stream, grpc_pollset* pollset) {}
+void SetPollset(grpc_transport* self, grpc_stream* stream,
+                grpc_pollset* pollset) {}
 
 /* implementation of grpc_transport_set_pollset */
-void SetPollsetSet(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                   grpc_stream* stream, grpc_pollset_set* pollset_set) {}
+void SetPollsetSet(grpc_transport* self, grpc_stream* stream,
+                   grpc_pollset_set* pollset_set) {}
 
 /* implementation of grpc_transport_perform_stream_op */
-void PerformStreamOp(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                     grpc_stream* stream, grpc_transport_stream_op_batch* op) {
-  GRPC_CLOSURE_SCHED(exec_ctx, op->on_complete, GRPC_ERROR_NONE);
+void PerformStreamOp(grpc_transport* self, grpc_stream* stream,
+                     grpc_transport_stream_op_batch* op) {
+  GRPC_CLOSURE_SCHED(op->on_complete, GRPC_ERROR_NONE);
 }
 
 /* implementation of grpc_transport_perform_op */
-void PerformOp(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-               grpc_transport_op* op) {}
+void PerformOp(grpc_transport* self, grpc_transport_op* op) {}
 
 /* implementation of grpc_transport_destroy_stream */
-void DestroyStream(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                   grpc_stream* stream, grpc_closure* then_sched_closure) {}
+void DestroyStream(grpc_transport* self, grpc_stream* stream,
+                   grpc_closure* then_sched_closure) {}
 
 /* implementation of grpc_transport_destroy */
-void Destroy(grpc_exec_ctx* exec_ctx, grpc_transport* self) {}
+void Destroy(grpc_transport* self) {}
 
 /* implementation of grpc_transport_get_endpoint */
-grpc_endpoint* GetEndpoint(grpc_exec_ctx* exec_ctx, grpc_transport* self) {
-  return nullptr;
-}
+grpc_endpoint* GetEndpoint(grpc_transport* self) { return nullptr; }
 
 static const grpc_transport_vtable dummy_transport_vtable = {
     0,          "dummy_http2", InitStream,
@@ -472,8 +459,8 @@ class NoOp {
  public:
   class Op {
    public:
-    Op(grpc_exec_ctx* exec_ctx, NoOp* p, grpc_call_stack* s) {}
-    void Finish(grpc_exec_ctx* exec_ctx) {}
+    Op(NoOp* p, grpc_call_stack* s) {}
+    void Finish() {}
   };
 };
 
@@ -489,13 +476,11 @@ class SendEmptyMetadata {
 
   class Op {
    public:
-    Op(grpc_exec_ctx* exec_ctx, SendEmptyMetadata* p, grpc_call_stack* s) {
+    Op(SendEmptyMetadata* p, grpc_call_stack* s) {
       grpc_metadata_batch_init(&batch_);
       p->op_payload_.send_initial_metadata.send_initial_metadata = &batch_;
     }
-    void Finish(grpc_exec_ctx* exec_ctx) {
-      grpc_metadata_batch_destroy(exec_ctx, &batch_);
-    }
+    void Finish() { grpc_metadata_batch_destroy(&batch_); }
 
    private:
     grpc_metadata_batch batch_;
@@ -536,20 +521,20 @@ static void BM_IsolatedFilter(benchmark::State& state) {
     label << " #has_dummy_filter";
   }
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   size_t channel_size = grpc_channel_stack_size(
       filters.size() == 0 ? nullptr : &filters[0], filters.size());
   grpc_channel_stack* channel_stack =
       static_cast<grpc_channel_stack*>(gpr_zalloc(channel_size));
   GPR_ASSERT(GRPC_LOG_IF_ERROR(
       "channel_stack_init",
-      grpc_channel_stack_init(&exec_ctx, 1, FilterDestroy, channel_stack,
-                              &filters[0], filters.size(), &channel_args,
+      grpc_channel_stack_init(1, FilterDestroy, channel_stack, &filters[0],
+                              filters.size(), &channel_args,
                               fixture.flags & REQUIRES_TRANSPORT
                                   ? &dummy_transport::dummy_transport
                                   : nullptr,
                               "CHANNEL", channel_stack)));
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   grpc_call_stack* call_stack =
       static_cast<grpc_call_stack*>(gpr_zalloc(channel_stack->call_stack_size));
   grpc_millis deadline = GRPC_MILLIS_INF_FUTURE;
@@ -568,12 +553,12 @@ static void BM_IsolatedFilter(benchmark::State& state) {
   call_args.arena = gpr_arena_create(kArenaSize);
   while (state.KeepRunning()) {
     GPR_TIMER_SCOPE("BenchmarkCycle", 0);
-    GRPC_ERROR_UNREF(grpc_call_stack_init(&exec_ctx, channel_stack, 1,
-                                          DoNothing, nullptr, &call_args));
-    typename TestOp::Op op(&exec_ctx, &test_op_data, call_stack);
-    grpc_call_stack_destroy(&exec_ctx, call_stack, &final_info, nullptr);
-    op.Finish(&exec_ctx);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_ERROR_UNREF(
+        grpc_call_stack_init(channel_stack, 1, DoNothing, nullptr, &call_args));
+    typename TestOp::Op op(&test_op_data, call_stack);
+    grpc_call_stack_destroy(call_stack, &final_info, nullptr);
+    op.Finish();
+    grpc_core::ExecCtx::Get()->Flush();
     // recreate arena every 64k iterations to avoid oom
     if (0 == (state.iterations() & 0xffff)) {
       gpr_arena_destroy(call_args.arena);
@@ -581,8 +566,8 @@ static void BM_IsolatedFilter(benchmark::State& state) {
     }
   }
   gpr_arena_destroy(call_args.arena);
-  grpc_channel_stack_destroy(&exec_ctx, channel_stack);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_stack_destroy(channel_stack);
+
   gpr_free(channel_stack);
   gpr_free(call_stack);
 
@@ -632,59 +617,55 @@ typedef struct {
   grpc_call_combiner* call_combiner;
 } call_data;
 
-static void StartTransportStreamOp(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem,
+static void StartTransportStreamOp(grpc_call_element* elem,
                                    grpc_transport_stream_op_batch* op) {
   call_data* calld = static_cast<call_data*>(elem->call_data);
   if (op->recv_initial_metadata) {
     GRPC_CALL_COMBINER_START(
-        exec_ctx, calld->call_combiner,
+        calld->call_combiner,
         op->payload->recv_initial_metadata.recv_initial_metadata_ready,
         GRPC_ERROR_NONE, "recv_initial_metadata");
   }
   if (op->recv_message) {
-    GRPC_CALL_COMBINER_START(exec_ctx, calld->call_combiner,
+    GRPC_CALL_COMBINER_START(calld->call_combiner,
                              op->payload->recv_message.recv_message_ready,
                              GRPC_ERROR_NONE, "recv_message");
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, op->on_complete, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(op->on_complete, GRPC_ERROR_NONE);
 }
 
-static void StartTransportOp(grpc_exec_ctx* exec_ctx,
-                             grpc_channel_element* elem,
+static void StartTransportOp(grpc_channel_element* elem,
                              grpc_transport_op* op) {
   if (op->disconnect_with_error != GRPC_ERROR_NONE) {
     GRPC_ERROR_UNREF(op->disconnect_with_error);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, op->on_consumed, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(op->on_consumed, GRPC_ERROR_NONE);
 }
 
-static grpc_error* InitCallElem(grpc_exec_ctx* exec_ctx,
-                                grpc_call_element* elem,
+static grpc_error* InitCallElem(grpc_call_element* elem,
                                 const grpc_call_element_args* args) {
   call_data* calld = static_cast<call_data*>(elem->call_data);
   calld->call_combiner = args->call_combiner;
   return GRPC_ERROR_NONE;
 }
 
-static void SetPollsetOrPollsetSet(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem,
+static void SetPollsetOrPollsetSet(grpc_call_element* elem,
                                    grpc_polling_entity* pollent) {}
 
-static void DestroyCallElem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void DestroyCallElem(grpc_call_element* elem,
                             const grpc_call_final_info* final_info,
                             grpc_closure* then_sched_closure) {
-  GRPC_CLOSURE_SCHED(exec_ctx, then_sched_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(then_sched_closure, GRPC_ERROR_NONE);
 }
 
-grpc_error* InitChannelElem(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+grpc_error* InitChannelElem(grpc_channel_element* elem,
                             grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-void DestroyChannelElem(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem) {}
+void DestroyChannelElem(grpc_channel_element* elem) {}
 
-void GetChannelInfo(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+void GetChannelInfo(grpc_channel_element* elem,
                     const grpc_channel_info* channel_info) {}
 
 static const grpc_channel_filter isolated_call_filter = {
@@ -711,10 +692,8 @@ class IsolatedCallFixture : public TrackCounters {
         builder, &isolated_call_filter::isolated_call_filter, nullptr,
         nullptr));
     {
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-      channel_ = grpc_channel_create_with_builder(&exec_ctx, builder,
-                                                  GRPC_CLIENT_CHANNEL);
-      grpc_exec_ctx_finish(&exec_ctx);
+      grpc_core::ExecCtx exec_ctx;
+      channel_ = grpc_channel_create_with_builder(builder, GRPC_CLIENT_CHANNEL);
     }
     cq_ = grpc_completion_queue_create_for_next(nullptr);
   }
diff --git a/test/cpp/microbenchmarks/bm_chttp2_hpack.cc b/test/cpp/microbenchmarks/bm_chttp2_hpack.cc
index 3fff8b02d6..4b7310389c 100644
--- a/test/cpp/microbenchmarks/bm_chttp2_hpack.cc
+++ b/test/cpp/microbenchmarks/bm_chttp2_hpack.cc
@@ -50,22 +50,22 @@ static grpc_slice MakeSlice(std::vector<uint8_t> bytes) {
 
 static void BM_HpackEncoderInitDestroy(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_chttp2_hpack_compressor c;
   while (state.KeepRunning()) {
     grpc_chttp2_hpack_compressor_init(&c);
-    grpc_chttp2_hpack_compressor_destroy(&exec_ctx, &c);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_chttp2_hpack_compressor_destroy(&c);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_HpackEncoderInitDestroy);
 
 static void BM_HpackEncoderEncodeDeadline(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_millis saved_now = grpc_exec_ctx_now(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_millis saved_now = grpc_core::ExecCtx::Get()->Now();
 
   grpc_metadata_batch b;
   grpc_metadata_batch_init(&b);
@@ -85,14 +85,13 @@ static void BM_HpackEncoderEncodeDeadline(benchmark::State& state) {
         (size_t)1024,
         &stats,
     };
-    grpc_chttp2_encode_header(&exec_ctx, &c, nullptr, 0, &b, &hopt, &outbuf);
-    grpc_slice_buffer_reset_and_unref_internal(&exec_ctx, &outbuf);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_chttp2_encode_header(&c, nullptr, 0, &b, &hopt, &outbuf);
+    grpc_slice_buffer_reset_and_unref_internal(&outbuf);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_metadata_batch_destroy(&exec_ctx, &b);
-  grpc_chttp2_hpack_compressor_destroy(&exec_ctx, &c);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &outbuf);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_metadata_batch_destroy(&b);
+  grpc_chttp2_hpack_compressor_destroy(&c);
+  grpc_slice_buffer_destroy_internal(&outbuf);
 
   std::ostringstream label;
   label << "framing_bytes/iter:"
@@ -109,17 +108,16 @@ BENCHMARK(BM_HpackEncoderEncodeDeadline);
 template <class Fixture>
 static void BM_HpackEncoderEncodeHeader(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   static bool logged_representative_output = false;
 
   grpc_metadata_batch b;
   grpc_metadata_batch_init(&b);
-  std::vector<grpc_mdelem> elems = Fixture::GetElems(&exec_ctx);
+  std::vector<grpc_mdelem> elems = Fixture::GetElems();
   std::vector<grpc_linked_mdelem> storage(elems.size());
   for (size_t i = 0; i < elems.size(); i++) {
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "addmd",
-        grpc_metadata_batch_add_tail(&exec_ctx, &b, &storage[i], elems[i])));
+        "addmd", grpc_metadata_batch_add_tail(&b, &storage[i], elems[i])));
   }
 
   grpc_chttp2_hpack_compressor c;
@@ -136,7 +134,7 @@ static void BM_HpackEncoderEncodeHeader(benchmark::State& state) {
         (size_t)state.range(1),
         &stats,
     };
-    grpc_chttp2_encode_header(&exec_ctx, &c, nullptr, 0, &b, &hopt, &outbuf);
+    grpc_chttp2_encode_header(&c, nullptr, 0, &b, &hopt, &outbuf);
     if (!logged_representative_output && state.iterations() > 3) {
       logged_representative_output = true;
       for (size_t i = 0; i < outbuf.count; i++) {
@@ -145,13 +143,12 @@ static void BM_HpackEncoderEncodeHeader(benchmark::State& state) {
         gpr_free(s);
       }
     }
-    grpc_slice_buffer_reset_and_unref_internal(&exec_ctx, &outbuf);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_slice_buffer_reset_and_unref_internal(&outbuf);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_metadata_batch_destroy(&exec_ctx, &b);
-  grpc_chttp2_hpack_compressor_destroy(&exec_ctx, &c);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &outbuf);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_metadata_batch_destroy(&b);
+  grpc_chttp2_hpack_compressor_destroy(&c);
+  grpc_slice_buffer_destroy_internal(&outbuf);
 
   std::ostringstream label;
   label << "framing_bytes/iter:"
@@ -169,15 +166,13 @@ namespace hpack_encoder_fixtures {
 class EmptyBatch {
  public:
   static constexpr bool kEnableTrueBinary = false;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
-    return {};
-  }
+  static std::vector<grpc_mdelem> GetElems() { return {}; }
 };
 
 class SingleStaticElem {
  public:
   static constexpr bool kEnableTrueBinary = false;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE};
   }
 };
@@ -185,9 +180,9 @@ class SingleStaticElem {
 class SingleInternedElem {
  public:
   static constexpr bool kEnableTrueBinary = false;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {grpc_mdelem_from_slices(
-        exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("abc")),
+        grpc_slice_intern(grpc_slice_from_static_string("abc")),
         grpc_slice_intern(grpc_slice_from_static_string("def")))};
   }
 };
@@ -196,10 +191,10 @@ template <int kLength, bool kTrueBinary>
 class SingleInternedBinaryElem {
  public:
   static constexpr bool kEnableTrueBinary = kTrueBinary;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     grpc_slice bytes = MakeBytes();
     std::vector<grpc_mdelem> out = {grpc_mdelem_from_slices(
-        exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("abc-bin")),
+        grpc_slice_intern(grpc_slice_from_static_string("abc-bin")),
         grpc_slice_intern(bytes))};
     grpc_slice_unref(bytes);
     return out;
@@ -218,9 +213,9 @@ class SingleInternedBinaryElem {
 class SingleInternedKeyElem {
  public:
   static constexpr bool kEnableTrueBinary = false;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {grpc_mdelem_from_slices(
-        exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("abc")),
+        grpc_slice_intern(grpc_slice_from_static_string("abc")),
         grpc_slice_from_static_string("def"))};
   }
 };
@@ -228,9 +223,8 @@ class SingleInternedKeyElem {
 class SingleNonInternedElem {
  public:
   static constexpr bool kEnableTrueBinary = false;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
-    return {grpc_mdelem_from_slices(exec_ctx,
-                                    grpc_slice_from_static_string("abc"),
+  static std::vector<grpc_mdelem> GetElems() {
+    return {grpc_mdelem_from_slices(grpc_slice_from_static_string("abc"),
                                     grpc_slice_from_static_string("def"))};
   }
 };
@@ -239,9 +233,9 @@ template <int kLength, bool kTrueBinary>
 class SingleNonInternedBinaryElem {
  public:
   static constexpr bool kEnableTrueBinary = kTrueBinary;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
-    return {grpc_mdelem_from_slices(
-        exec_ctx, grpc_slice_from_static_string("abc-bin"), MakeBytes())};
+  static std::vector<grpc_mdelem> GetElems() {
+    return {grpc_mdelem_from_slices(grpc_slice_from_static_string("abc-bin"),
+                                    MakeBytes())};
   }
 
  private:
@@ -257,21 +251,21 @@ class SingleNonInternedBinaryElem {
 class RepresentativeClientInitialMetadata {
  public:
   static constexpr bool kEnableTrueBinary = true;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {
         GRPC_MDELEM_SCHEME_HTTP,
         GRPC_MDELEM_METHOD_POST,
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_PATH,
+            GRPC_MDSTR_PATH,
             grpc_slice_intern(grpc_slice_from_static_string("/foo/bar"))),
-        grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_AUTHORITY,
+        grpc_mdelem_from_slices(GRPC_MDSTR_AUTHORITY,
                                 grpc_slice_intern(grpc_slice_from_static_string(
                                     "foo.test.google.fr:1234"))),
         GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE_COMMA_GZIP,
         GRPC_MDELEM_TE_TRAILERS,
         GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC,
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_USER_AGENT,
+            GRPC_MDSTR_USER_AGENT,
             grpc_slice_intern(grpc_slice_from_static_string(
                 "grpc-c/3.0.0-dev (linux; chttp2; green)")))};
   }
@@ -283,18 +277,18 @@ class RepresentativeClientInitialMetadata {
 class MoreRepresentativeClientInitialMetadata {
  public:
   static constexpr bool kEnableTrueBinary = true;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {
         GRPC_MDELEM_SCHEME_HTTP,
         GRPC_MDELEM_METHOD_POST,
-        grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_PATH,
+        grpc_mdelem_from_slices(GRPC_MDSTR_PATH,
                                 grpc_slice_intern(grpc_slice_from_static_string(
                                     "/grpc.test.FooService/BarMethod"))),
-        grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_AUTHORITY,
+        grpc_mdelem_from_slices(GRPC_MDSTR_AUTHORITY,
                                 grpc_slice_intern(grpc_slice_from_static_string(
                                     "foo.test.google.fr:1234"))),
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_GRPC_TRACE_BIN,
+            GRPC_MDSTR_GRPC_TRACE_BIN,
             grpc_slice_from_static_string("\x00\x01\x02\x03\x04\x05\x06\x07\x08"
                                           "\x09\x0a\x0b\x0c\x0d\x0e\x0f"
                                           "\x10\x11\x12\x13\x14\x15\x16\x17\x18"
@@ -303,7 +297,7 @@ class MoreRepresentativeClientInitialMetadata {
                                           "\x29\x2a\x2b\x2c\x2d\x2e\x2f"
                                           "\x30")),
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_GRPC_TAGS_BIN,
+            GRPC_MDSTR_GRPC_TAGS_BIN,
             grpc_slice_from_static_string("\x00\x01\x02\x03\x04\x05\x06\x07\x08"
                                           "\x09\x0a\x0b\x0c\x0d\x0e\x0f"
                                           "\x10\x11\x12\x13")),
@@ -311,7 +305,7 @@ class MoreRepresentativeClientInitialMetadata {
         GRPC_MDELEM_TE_TRAILERS,
         GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC,
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_USER_AGENT,
+            GRPC_MDSTR_USER_AGENT,
             grpc_slice_intern(grpc_slice_from_static_string(
                 "grpc-c/3.0.0-dev (linux; chttp2; green)")))};
   }
@@ -320,7 +314,7 @@ class MoreRepresentativeClientInitialMetadata {
 class RepresentativeServerInitialMetadata {
  public:
   static constexpr bool kEnableTrueBinary = true;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {GRPC_MDELEM_STATUS_200,
             GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC,
             GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE_COMMA_GZIP};
@@ -330,7 +324,7 @@ class RepresentativeServerInitialMetadata {
 class RepresentativeServerTrailingMetadata {
  public:
   static constexpr bool kEnableTrueBinary = true;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {GRPC_MDELEM_GRPC_STATUS_0};
   }
 };
@@ -431,48 +425,45 @@ BENCHMARK_TEMPLATE(BM_HpackEncoderEncodeHeader,
 
 static void BM_HpackParserInitDestroy(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_chttp2_hpack_parser p;
   while (state.KeepRunning()) {
-    grpc_chttp2_hpack_parser_init(&exec_ctx, &p);
-    grpc_chttp2_hpack_parser_destroy(&exec_ctx, &p);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_chttp2_hpack_parser_init(&p);
+    grpc_chttp2_hpack_parser_destroy(&p);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_HpackParserInitDestroy);
 
-static void UnrefHeader(grpc_exec_ctx* exec_ctx, void* user_data,
-                        grpc_mdelem md) {
-  GRPC_MDELEM_UNREF(exec_ctx, md);
+static void UnrefHeader(void* user_data, grpc_mdelem md) {
+  GRPC_MDELEM_UNREF(md);
 }
 
-template <class Fixture, void (*OnHeader)(grpc_exec_ctx*, void*, grpc_mdelem)>
+template <class Fixture, void (*OnHeader)(void*, grpc_mdelem)>
 static void BM_HpackParserParseHeader(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   std::vector<grpc_slice> init_slices = Fixture::GetInitSlices();
   std::vector<grpc_slice> benchmark_slices = Fixture::GetBenchmarkSlices();
   grpc_chttp2_hpack_parser p;
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &p);
+  grpc_chttp2_hpack_parser_init(&p);
   p.on_header = OnHeader;
   p.on_header_user_data = nullptr;
   for (auto slice : init_slices) {
-    GPR_ASSERT(GRPC_ERROR_NONE ==
-               grpc_chttp2_hpack_parser_parse(&exec_ctx, &p, slice));
+    GPR_ASSERT(GRPC_ERROR_NONE == grpc_chttp2_hpack_parser_parse(&p, slice));
   }
   while (state.KeepRunning()) {
     for (auto slice : benchmark_slices) {
-      GPR_ASSERT(GRPC_ERROR_NONE ==
-                 grpc_chttp2_hpack_parser_parse(&exec_ctx, &p, slice));
+      GPR_ASSERT(GRPC_ERROR_NONE == grpc_chttp2_hpack_parser_parse(&p, slice));
     }
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   }
   for (auto slice : init_slices) grpc_slice_unref(slice);
   for (auto slice : benchmark_slices) grpc_slice_unref(slice);
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &p);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_hpack_parser_destroy(&p);
+
   track_counters.Finish(state);
 }
 
@@ -769,8 +760,7 @@ class RepresentativeServerTrailingMetadata {
 static void free_timeout(void* p) { gpr_free(p); }
 
 // New implementation.
-static void OnHeaderNew(grpc_exec_ctx* exec_ctx, void* user_data,
-                        grpc_mdelem md) {
+static void OnHeaderNew(void* user_data, grpc_mdelem md) {
   if (grpc_slice_eq(GRPC_MDKEY(md), GRPC_MDSTR_GRPC_TIMEOUT)) {
     grpc_millis* cached_timeout =
         static_cast<grpc_millis*>(grpc_mdelem_get_user_data(md, free_timeout));
@@ -793,7 +783,7 @@ static void OnHeaderNew(grpc_exec_ctx* exec_ctx, void* user_data,
       }
     }
     benchmark::DoNotOptimize(timeout);
-    GRPC_MDELEM_UNREF(exec_ctx, md);
+    GRPC_MDELEM_UNREF(md);
   } else {
     GPR_ASSERT(0);
   }
diff --git a/test/cpp/microbenchmarks/bm_chttp2_transport.cc b/test/cpp/microbenchmarks/bm_chttp2_transport.cc
index be4da4d0bd..fcb1677d09 100644
--- a/test/cpp/microbenchmarks/bm_chttp2_transport.cc
+++ b/test/cpp/microbenchmarks/bm_chttp2_transport.cc
@@ -58,7 +58,7 @@ class DummyEndpoint : public grpc_endpoint {
     ru_ = grpc_resource_user_create(Library::get().rq(), "dummy_endpoint");
   }
 
-  void PushInput(grpc_exec_ctx* exec_ctx, grpc_slice slice) {
+  void PushInput(grpc_slice slice) {
     if (read_cb_ == nullptr) {
       GPR_ASSERT(!have_slice_);
       buffered_slice_ = slice;
@@ -66,7 +66,7 @@ class DummyEndpoint : public grpc_endpoint {
       return;
     }
     grpc_slice_buffer_add(slices_, slice);
-    GRPC_CLOSURE_SCHED(exec_ctx, read_cb_, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(read_cb_, GRPC_ERROR_NONE);
     read_cb_ = nullptr;
   }
 
@@ -77,50 +77,45 @@ class DummyEndpoint : public grpc_endpoint {
   bool have_slice_ = false;
   grpc_slice buffered_slice_;
 
-  void QueueRead(grpc_exec_ctx* exec_ctx, grpc_slice_buffer* slices,
-                 grpc_closure* cb) {
+  void QueueRead(grpc_slice_buffer* slices, grpc_closure* cb) {
     GPR_ASSERT(read_cb_ == nullptr);
     if (have_slice_) {
       have_slice_ = false;
       grpc_slice_buffer_add(slices, buffered_slice_);
-      GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_NONE);
       return;
     }
     read_cb_ = cb;
     slices_ = slices;
   }
 
-  static void read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                   grpc_slice_buffer* slices, grpc_closure* cb) {
-    static_cast<DummyEndpoint*>(ep)->QueueRead(exec_ctx, slices, cb);
+  static void read(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                   grpc_closure* cb) {
+    static_cast<DummyEndpoint*>(ep)->QueueRead(slices, cb);
   }
 
-  static void write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                    grpc_slice_buffer* slices, grpc_closure* cb) {
-    GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
+  static void write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                    grpc_closure* cb) {
+    GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_NONE);
   }
 
   static grpc_workqueue* get_workqueue(grpc_endpoint* ep) { return nullptr; }
 
-  static void add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                             grpc_pollset* pollset) {}
+  static void add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {}
 
-  static void add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                 grpc_pollset_set* pollset) {}
+  static void add_to_pollset_set(grpc_endpoint* ep, grpc_pollset_set* pollset) {
+  }
 
-  static void delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_endpoint* ep,
+  static void delete_from_pollset_set(grpc_endpoint* ep,
                                       grpc_pollset_set* pollset) {}
 
-  static void shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                       grpc_error* why) {
-    grpc_resource_user_shutdown(exec_ctx, static_cast<DummyEndpoint*>(ep)->ru_);
-    GRPC_CLOSURE_SCHED(exec_ctx, static_cast<DummyEndpoint*>(ep)->read_cb_,
-                       why);
+  static void shutdown(grpc_endpoint* ep, grpc_error* why) {
+    grpc_resource_user_shutdown(static_cast<DummyEndpoint*>(ep)->ru_);
+    GRPC_CLOSURE_SCHED(static_cast<DummyEndpoint*>(ep)->read_cb_, why);
   }
 
-  static void destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
-    grpc_resource_user_unref(exec_ctx, static_cast<DummyEndpoint*>(ep)->ru_);
+  static void destroy(grpc_endpoint* ep) {
+    grpc_resource_user_unref(static_cast<DummyEndpoint*>(ep)->ru_);
     delete static_cast<DummyEndpoint*>(ep);
   }
 
@@ -136,29 +131,24 @@ class Fixture {
   Fixture(const grpc::ChannelArguments& args, bool client) {
     grpc_channel_args c_args = args.c_channel_args();
     ep_ = new DummyEndpoint;
-    t_ = grpc_create_chttp2_transport(exec_ctx(), &c_args, ep_, client);
-    grpc_chttp2_transport_start_reading(exec_ctx(), t_, nullptr, nullptr);
+    t_ = grpc_create_chttp2_transport(&c_args, ep_, client);
+    grpc_chttp2_transport_start_reading(t_, nullptr, nullptr);
     FlushExecCtx();
   }
 
-  void FlushExecCtx() { grpc_exec_ctx_flush(&exec_ctx_); }
+  void FlushExecCtx() { grpc_core::ExecCtx::Get()->Flush(); }
 
-  ~Fixture() {
-    grpc_transport_destroy(&exec_ctx_, t_);
-    grpc_exec_ctx_finish(&exec_ctx_);
-  }
+  ~Fixture() { grpc_transport_destroy(t_); }
 
   grpc_chttp2_transport* chttp2_transport() {
     return reinterpret_cast<grpc_chttp2_transport*>(t_);
   }
   grpc_transport* transport() { return t_; }
-  grpc_exec_ctx* exec_ctx() { return &exec_ctx_; }
 
-  void PushInput(grpc_slice slice) { ep_->PushInput(exec_ctx(), slice); }
+  void PushInput(grpc_slice slice) { ep_->PushInput(slice); }
 
  private:
   DummyEndpoint* ep_;
-  grpc_exec_ctx exec_ctx_ = GRPC_EXEC_CTX_INIT;
   grpc_transport* t_;
 };
 
@@ -175,8 +165,8 @@ std::unique_ptr<Closure> MakeClosure(
       GRPC_CLOSURE_INIT(this, Execute, this, sched);
     }
     F f_;
-    static void Execute(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
-      static_cast<C*>(arg)->f_(exec_ctx, error);
+    static void Execute(void* arg, grpc_error* error) {
+      static_cast<C*>(arg)->f_(error);
     }
   };
   return std::unique_ptr<Closure>(new C(f, sched));
@@ -188,8 +178,8 @@ grpc_closure* MakeOnceClosure(
   struct C : public grpc_closure {
     C(const F& f) : f_(f) {}
     F f_;
-    static void Execute(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
-      static_cast<C*>(arg)->f_(exec_ctx, error);
+    static void Execute(void* arg, grpc_error* error) {
+      static_cast<C*>(arg)->f_(error);
       delete static_cast<C*>(arg);
     }
   };
@@ -220,22 +210,22 @@ class Stream {
       gpr_arena_destroy(arena_);
       arena_ = gpr_arena_create(4096);
     }
-    grpc_transport_init_stream(f_->exec_ctx(), f_->transport(),
+    grpc_transport_init_stream(f_->transport(),
                                static_cast<grpc_stream*>(stream_), &refcount_,
                                nullptr, arena_);
   }
 
-  void DestroyThen(grpc_exec_ctx* exec_ctx, grpc_closure* closure) {
+  void DestroyThen(grpc_closure* closure) {
     destroy_closure_ = closure;
 #ifndef NDEBUG
-    grpc_stream_unref(exec_ctx, &refcount_, "DestroyThen");
+    grpc_stream_unref(&refcount_, "DestroyThen");
 #else
-    grpc_stream_unref(exec_ctx, &refcount_);
+    grpc_stream_unref(&refcount_);
 #endif
   }
 
-  void Op(grpc_exec_ctx* exec_ctx, grpc_transport_stream_op_batch* op) {
-    grpc_transport_perform_stream_op(exec_ctx, f_->transport(),
+  void Op(grpc_transport_stream_op_batch* op) {
+    grpc_transport_perform_stream_op(f_->transport(),
                                      static_cast<grpc_stream*>(stream_), op);
   }
 
@@ -244,10 +234,9 @@ class Stream {
   }
 
  private:
-  static void FinishDestroy(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+  static void FinishDestroy(void* arg, grpc_error* error) {
     auto stream = static_cast<Stream*>(arg);
-    grpc_transport_destroy_stream(exec_ctx, stream->f_->transport(),
+    grpc_transport_destroy_stream(stream->f_->transport(),
                                   static_cast<grpc_stream*>(stream->stream_),
                                   stream->destroy_closure_);
     gpr_event_set(&stream->done_, (void*)1);
@@ -268,6 +257,7 @@ class Stream {
 
 static void BM_StreamCreateDestroy(benchmark::State& state) {
   TrackCounters track_counters;
+  grpc_core::ExecCtx exec_ctx;
   Fixture f(grpc::ChannelArguments(), true);
   Stream s(&f);
   grpc_transport_stream_op_batch op;
@@ -276,14 +266,13 @@ static void BM_StreamCreateDestroy(benchmark::State& state) {
   op.cancel_stream = true;
   op.payload = &op_payload;
   op_payload.cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
-  std::unique_ptr<Closure> next =
-      MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
-        if (!state.KeepRunning()) return;
-        s.Init(state);
-        s.Op(exec_ctx, &op);
-        s.DestroyThen(exec_ctx, next.get());
-      });
-  GRPC_CLOSURE_RUN(f.exec_ctx(), next.get(), GRPC_ERROR_NONE);
+  std::unique_ptr<Closure> next = MakeClosure([&](grpc_error* error) {
+    if (!state.KeepRunning()) return;
+    s.Init(state);
+    s.Op(&op);
+    s.DestroyThen(next.get());
+  });
+  GRPC_CLOSURE_RUN(next.get(), GRPC_ERROR_NONE);
   f.FlushExecCtx();
   track_counters.Finish(state);
 }
@@ -291,21 +280,21 @@ BENCHMARK(BM_StreamCreateDestroy);
 
 class RepresentativeClientInitialMetadata {
  public:
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {
         GRPC_MDELEM_SCHEME_HTTP,
         GRPC_MDELEM_METHOD_POST,
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_PATH,
+            GRPC_MDSTR_PATH,
             grpc_slice_intern(grpc_slice_from_static_string("/foo/bar"))),
-        grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_AUTHORITY,
+        grpc_mdelem_from_slices(GRPC_MDSTR_AUTHORITY,
                                 grpc_slice_intern(grpc_slice_from_static_string(
                                     "foo.test.google.fr:1234"))),
         GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE_COMMA_GZIP,
         GRPC_MDELEM_TE_TRAILERS,
         GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC,
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_USER_AGENT,
+            GRPC_MDSTR_USER_AGENT,
             grpc_slice_intern(grpc_slice_from_static_string(
                 "grpc-c/3.0.0-dev (linux; chttp2; green)")))};
   }
@@ -314,6 +303,7 @@ class RepresentativeClientInitialMetadata {
 template <class Metadata>
 static void BM_StreamCreateSendInitialMetadataDestroy(benchmark::State& state) {
   TrackCounters track_counters;
+  grpc_core::ExecCtx exec_ctx;
   Fixture f(grpc::ChannelArguments(), true);
   Stream s(&f);
   grpc_transport_stream_op_batch op;
@@ -330,34 +320,33 @@ static void BM_StreamCreateSendInitialMetadataDestroy(benchmark::State& state) {
   grpc_metadata_batch b;
   grpc_metadata_batch_init(&b);
   b.deadline = GRPC_MILLIS_INF_FUTURE;
-  std::vector<grpc_mdelem> elems = Metadata::GetElems(f.exec_ctx());
+  std::vector<grpc_mdelem> elems = Metadata::GetElems();
   std::vector<grpc_linked_mdelem> storage(elems.size());
   for (size_t i = 0; i < elems.size(); i++) {
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "addmd",
-        grpc_metadata_batch_add_tail(f.exec_ctx(), &b, &storage[i], elems[i])));
+        "addmd", grpc_metadata_batch_add_tail(&b, &storage[i], elems[i])));
   }
 
   f.FlushExecCtx();
-  start = MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
+  start = MakeClosure([&](grpc_error* error) {
     if (!state.KeepRunning()) return;
     s.Init(state);
     reset_op();
     op.on_complete = done.get();
     op.send_initial_metadata = true;
     op.payload->send_initial_metadata.send_initial_metadata = &b;
-    s.Op(exec_ctx, &op);
+    s.Op(&op);
   });
-  done = MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
+  done = MakeClosure([&](grpc_error* error) {
     reset_op();
     op.cancel_stream = true;
     op.payload->cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
-    s.Op(exec_ctx, &op);
-    s.DestroyThen(exec_ctx, start.get());
+    s.Op(&op);
+    s.DestroyThen(start.get());
   });
-  GRPC_CLOSURE_SCHED(f.exec_ctx(), start.get(), GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(start.get(), GRPC_ERROR_NONE);
   f.FlushExecCtx();
-  grpc_metadata_batch_destroy(f.exec_ctx(), &b);
+  grpc_metadata_batch_destroy(&b);
   track_counters.Finish(state);
 }
 BENCHMARK_TEMPLATE(BM_StreamCreateSendInitialMetadataDestroy,
@@ -365,6 +354,7 @@ BENCHMARK_TEMPLATE(BM_StreamCreateSendInitialMetadataDestroy,
 
 static void BM_TransportEmptyOp(benchmark::State& state) {
   TrackCounters track_counters;
+  grpc_core::ExecCtx exec_ctx;
   Fixture f(grpc::ChannelArguments(), true);
   Stream s(&f);
   s.Init(state);
@@ -375,21 +365,19 @@ static void BM_TransportEmptyOp(benchmark::State& state) {
     memset(&op, 0, sizeof(op));
     op.payload = &op_payload;
   };
-  std::unique_ptr<Closure> c =
-      MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
-        if (!state.KeepRunning()) return;
-        reset_op();
-        op.on_complete = c.get();
-        s.Op(exec_ctx, &op);
-      });
-  GRPC_CLOSURE_SCHED(f.exec_ctx(), c.get(), GRPC_ERROR_NONE);
+  std::unique_ptr<Closure> c = MakeClosure([&](grpc_error* error) {
+    if (!state.KeepRunning()) return;
+    reset_op();
+    op.on_complete = c.get();
+    s.Op(&op);
+  });
+  GRPC_CLOSURE_SCHED(c.get(), GRPC_ERROR_NONE);
   f.FlushExecCtx();
   reset_op();
   op.cancel_stream = true;
   op_payload.cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
-  s.Op(f.exec_ctx(), &op);
-  s.DestroyThen(f.exec_ctx(), MakeOnceClosure([](grpc_exec_ctx* exec_ctx,
-                                                 grpc_error* error) {}));
+  s.Op(&op);
+  s.DestroyThen(MakeOnceClosure([](grpc_error* error) {}));
   f.FlushExecCtx();
   track_counters.Finish(state);
 }
@@ -399,6 +387,7 @@ std::vector<std::unique_ptr<gpr_event>> done_events;
 
 static void BM_TransportStreamSend(benchmark::State& state) {
   TrackCounters track_counters;
+  grpc_core::ExecCtx exec_ctx;
   Fixture f(grpc::ChannelArguments(), true);
   auto s = std::unique_ptr<Stream>(new Stream(&f));
   s->Init(state);
@@ -420,39 +409,37 @@ static void BM_TransportStreamSend(benchmark::State& state) {
   grpc_metadata_batch_init(&b);
   b.deadline = GRPC_MILLIS_INF_FUTURE;
   std::vector<grpc_mdelem> elems =
-      RepresentativeClientInitialMetadata::GetElems(f.exec_ctx());
+      RepresentativeClientInitialMetadata::GetElems();
   std::vector<grpc_linked_mdelem> storage(elems.size());
   for (size_t i = 0; i < elems.size(); i++) {
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "addmd",
-        grpc_metadata_batch_add_tail(f.exec_ctx(), &b, &storage[i], elems[i])));
+        "addmd", grpc_metadata_batch_add_tail(&b, &storage[i], elems[i])));
   }
 
   gpr_event* bm_done = new gpr_event;
   gpr_event_init(bm_done);
 
-  std::unique_ptr<Closure> c =
-      MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
-        if (!state.KeepRunning()) {
-          gpr_event_set(bm_done, (void*)1);
-          return;
-        }
-        // force outgoing window to be yuge
-        s->chttp2_stream()->flow_control->TestOnlyForceHugeWindow();
-        f.chttp2_transport()->flow_control->TestOnlyForceHugeWindow();
-        grpc_slice_buffer_stream_init(&send_stream, &send_buffer, 0);
-        reset_op();
-        op.on_complete = c.get();
-        op.send_message = true;
-        op.payload->send_message.send_message = &send_stream.base;
-        s->Op(exec_ctx, &op);
-      });
+  std::unique_ptr<Closure> c = MakeClosure([&](grpc_error* error) {
+    if (!state.KeepRunning()) {
+      gpr_event_set(bm_done, (void*)1);
+      return;
+    }
+    // force outgoing window to be yuge
+    s->chttp2_stream()->flow_control->TestOnlyForceHugeWindow();
+    f.chttp2_transport()->flow_control->TestOnlyForceHugeWindow();
+    grpc_slice_buffer_stream_init(&send_stream, &send_buffer, 0);
+    reset_op();
+    op.on_complete = c.get();
+    op.send_message = true;
+    op.payload->send_message.send_message = &send_stream.base;
+    s->Op(&op);
+  });
 
   reset_op();
   op.send_initial_metadata = true;
   op.payload->send_initial_metadata.send_initial_metadata = &b;
   op.on_complete = c.get();
-  s->Op(f.exec_ctx(), &op);
+  s->Op(&op);
 
   f.FlushExecCtx();
   gpr_event_wait(bm_done, gpr_inf_future(GPR_CLOCK_REALTIME));
@@ -461,13 +448,12 @@ static void BM_TransportStreamSend(benchmark::State& state) {
   reset_op();
   op.cancel_stream = true;
   op.payload->cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
-  s->Op(f.exec_ctx(), &op);
-  s->DestroyThen(f.exec_ctx(), MakeOnceClosure([](grpc_exec_ctx* exec_ctx,
-                                                  grpc_error* error) {}));
+  s->Op(&op);
+  s->DestroyThen(MakeOnceClosure([](grpc_error* error) {}));
   f.FlushExecCtx();
   s.reset();
   track_counters.Finish(state);
-  grpc_metadata_batch_destroy(f.exec_ctx(), &b);
+  grpc_metadata_batch_destroy(&b);
   grpc_slice_buffer_destroy(&send_buffer);
 }
 BENCHMARK(BM_TransportStreamSend)->Range(0, 128 * 1024 * 1024);
@@ -531,6 +517,7 @@ static grpc_slice CreateIncomingDataSlice(size_t length, size_t frame_size) {
 
 static void BM_TransportStreamRecv(benchmark::State& state) {
   TrackCounters track_counters;
+  grpc_core::ExecCtx exec_ctx;
   Fixture f(grpc::ChannelArguments(), true);
   Stream s(&f);
   s.Init(state);
@@ -551,16 +538,14 @@ static void BM_TransportStreamRecv(benchmark::State& state) {
   grpc_metadata_batch_init(&b_recv);
   b.deadline = GRPC_MILLIS_INF_FUTURE;
   std::vector<grpc_mdelem> elems =
-      RepresentativeClientInitialMetadata::GetElems(f.exec_ctx());
+      RepresentativeClientInitialMetadata::GetElems();
   std::vector<grpc_linked_mdelem> storage(elems.size());
   for (size_t i = 0; i < elems.size(); i++) {
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "addmd",
-        grpc_metadata_batch_add_tail(f.exec_ctx(), &b, &storage[i], elems[i])));
+        "addmd", grpc_metadata_batch_add_tail(&b, &storage[i], elems[i])));
   }
 
-  std::unique_ptr<Closure> do_nothing =
-      MakeClosure([](grpc_exec_ctx* exec_ctx, grpc_error* error) {});
+  std::unique_ptr<Closure> do_nothing = MakeClosure([](grpc_error* error) {});
 
   uint32_t received;
 
@@ -569,51 +554,49 @@ static void BM_TransportStreamRecv(benchmark::State& state) {
   std::unique_ptr<Closure> drain_continue;
   grpc_slice recv_slice;
 
-  std::unique_ptr<Closure> c =
-      MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
-        if (!state.KeepRunning()) return;
-        // force outgoing window to be yuge
-        s.chttp2_stream()->flow_control->TestOnlyForceHugeWindow();
-        f.chttp2_transport()->flow_control->TestOnlyForceHugeWindow();
-        received = 0;
-        reset_op();
-        op.on_complete = do_nothing.get();
-        op.recv_message = true;
-        op.payload->recv_message.recv_message = &recv_stream;
-        op.payload->recv_message.recv_message_ready = drain_start.get();
-        s.Op(exec_ctx, &op);
-        f.PushInput(grpc_slice_ref(incoming_data));
-      });
-
-  drain_start = MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
+  std::unique_ptr<Closure> c = MakeClosure([&](grpc_error* error) {
+    if (!state.KeepRunning()) return;
+    // force outgoing window to be yuge
+    s.chttp2_stream()->flow_control->TestOnlyForceHugeWindow();
+    f.chttp2_transport()->flow_control->TestOnlyForceHugeWindow();
+    received = 0;
+    reset_op();
+    op.on_complete = do_nothing.get();
+    op.recv_message = true;
+    op.payload->recv_message.recv_message = &recv_stream;
+    op.payload->recv_message.recv_message_ready = drain_start.get();
+    s.Op(&op);
+    f.PushInput(grpc_slice_ref(incoming_data));
+  });
+
+  drain_start = MakeClosure([&](grpc_error* error) {
     if (recv_stream == nullptr) {
       GPR_ASSERT(!state.KeepRunning());
       return;
     }
-    GRPC_CLOSURE_RUN(exec_ctx, drain.get(), GRPC_ERROR_NONE);
+    GRPC_CLOSURE_RUN(drain.get(), GRPC_ERROR_NONE);
   });
 
-  drain = MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
+  drain = MakeClosure([&](grpc_error* error) {
     do {
       if (received == recv_stream->length) {
-        grpc_byte_stream_destroy(exec_ctx, recv_stream);
-        GRPC_CLOSURE_SCHED(exec_ctx, c.get(), GRPC_ERROR_NONE);
+        grpc_byte_stream_destroy(recv_stream);
+        GRPC_CLOSURE_SCHED(c.get(), GRPC_ERROR_NONE);
         return;
       }
-    } while (grpc_byte_stream_next(exec_ctx, recv_stream,
-                                   recv_stream->length - received,
+    } while (grpc_byte_stream_next(recv_stream, recv_stream->length - received,
                                    drain_continue.get()) &&
              GRPC_ERROR_NONE ==
-                 grpc_byte_stream_pull(exec_ctx, recv_stream, &recv_slice) &&
+                 grpc_byte_stream_pull(recv_stream, &recv_slice) &&
              (received += GRPC_SLICE_LENGTH(recv_slice),
-              grpc_slice_unref_internal(exec_ctx, recv_slice), true));
+              grpc_slice_unref_internal(recv_slice), true));
   });
 
-  drain_continue = MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
-    grpc_byte_stream_pull(exec_ctx, recv_stream, &recv_slice);
+  drain_continue = MakeClosure([&](grpc_error* error) {
+    grpc_byte_stream_pull(recv_stream, &recv_slice);
     received += GRPC_SLICE_LENGTH(recv_slice);
-    grpc_slice_unref_internal(exec_ctx, recv_slice);
-    GRPC_CLOSURE_RUN(exec_ctx, drain.get(), GRPC_ERROR_NONE);
+    grpc_slice_unref_internal(recv_slice);
+    GRPC_CLOSURE_RUN(drain.get(), GRPC_ERROR_NONE);
   });
 
   reset_op();
@@ -624,7 +607,7 @@ static void BM_TransportStreamRecv(benchmark::State& state) {
   op.payload->recv_initial_metadata.recv_initial_metadata_ready =
       do_nothing.get();
   op.on_complete = c.get();
-  s.Op(f.exec_ctx(), &op);
+  s.Op(&op);
   f.PushInput(SLICE_FROM_BUFFER(
       "\x00\x00\x00\x04\x00\x00\x00\x00\x00"
       // Generated using:
@@ -642,13 +625,12 @@ static void BM_TransportStreamRecv(benchmark::State& state) {
   reset_op();
   op.cancel_stream = true;
   op.payload->cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
-  s.Op(f.exec_ctx(), &op);
-  s.DestroyThen(f.exec_ctx(), MakeOnceClosure([](grpc_exec_ctx* exec_ctx,
-                                                 grpc_error* error) {}));
+  s.Op(&op);
+  s.DestroyThen(MakeOnceClosure([](grpc_error* error) {}));
   f.FlushExecCtx();
   track_counters.Finish(state);
-  grpc_metadata_batch_destroy(f.exec_ctx(), &b);
-  grpc_metadata_batch_destroy(f.exec_ctx(), &b_recv);
+  grpc_metadata_batch_destroy(&b);
+  grpc_metadata_batch_destroy(&b_recv);
   grpc_slice_unref(incoming_data);
 }
 BENCHMARK(BM_TransportStreamRecv)->Range(0, 128 * 1024 * 1024);
diff --git a/test/cpp/microbenchmarks/bm_closure.cc b/test/cpp/microbenchmarks/bm_closure.cc
index 2434d4e84e..4d5a82c3f6 100644
--- a/test/cpp/microbenchmarks/bm_closure.cc
+++ b/test/cpp/microbenchmarks/bm_closure.cc
@@ -34,8 +34,7 @@ auto& force_library_initialization = Library::get();
 static void BM_NoOpExecCtx(benchmark::State& state) {
   TrackCounters track_counters;
   while (state.KeepRunning()) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
   }
   track_counters.Finish(state);
 }
@@ -43,16 +42,16 @@ BENCHMARK(BM_NoOpExecCtx);
 
 static void BM_WellFlushed(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_WellFlushed);
 
-static void DoNothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void DoNothing(void* arg, grpc_error* error) {}
 
 static void BM_ClosureInitAgainstExecCtx(benchmark::State& state) {
   TrackCounters track_counters;
@@ -69,13 +68,13 @@ static void BM_ClosureInitAgainstCombiner(benchmark::State& state) {
   TrackCounters track_counters;
   grpc_combiner* combiner = grpc_combiner_create();
   grpc_closure c;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     benchmark::DoNotOptimize(GRPC_CLOSURE_INIT(
         &c, DoNothing, nullptr, grpc_combiner_scheduler(combiner)));
   }
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureInitAgainstCombiner);
@@ -84,41 +83,39 @@ static void BM_ClosureRunOnExecCtx(benchmark::State& state) {
   TrackCounters track_counters;
   grpc_closure c;
   GRPC_CLOSURE_INIT(&c, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_RUN(&exec_ctx, &c, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_RUN(&c, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureRunOnExecCtx);
 
 static void BM_ClosureCreateAndRun(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     GRPC_CLOSURE_RUN(
-        &exec_ctx,
         GRPC_CLOSURE_CREATE(DoNothing, nullptr, grpc_schedule_on_exec_ctx),
         GRPC_ERROR_NONE);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureCreateAndRun);
 
 static void BM_ClosureInitAndRun(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_closure c;
   while (state.KeepRunning()) {
     GRPC_CLOSURE_RUN(
-        &exec_ctx,
         GRPC_CLOSURE_INIT(&c, DoNothing, nullptr, grpc_schedule_on_exec_ctx),
         GRPC_ERROR_NONE);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureInitAndRun);
@@ -127,12 +124,12 @@ static void BM_ClosureSchedOnExecCtx(benchmark::State& state) {
   TrackCounters track_counters;
   grpc_closure c;
   GRPC_CLOSURE_INIT(&c, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSchedOnExecCtx);
@@ -143,13 +140,13 @@ static void BM_ClosureSched2OnExecCtx(benchmark::State& state) {
   grpc_closure c2;
   GRPC_CLOSURE_INIT(&c1, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
   GRPC_CLOSURE_INIT(&c2, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c1, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c2, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c1, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c2, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSched2OnExecCtx);
@@ -162,14 +159,14 @@ static void BM_ClosureSched3OnExecCtx(benchmark::State& state) {
   GRPC_CLOSURE_INIT(&c1, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
   GRPC_CLOSURE_INIT(&c2, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
   GRPC_CLOSURE_INIT(&c3, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c1, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c2, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c3, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c1, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c2, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c3, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSched3OnExecCtx);
@@ -179,13 +176,13 @@ static void BM_AcquireMutex(benchmark::State& state) {
   // for comparison with the combiner stuff below
   gpr_mu mu;
   gpr_mu_init(&mu);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     gpr_mu_lock(&mu);
-    DoNothing(&exec_ctx, nullptr, GRPC_ERROR_NONE);
+    DoNothing(nullptr, GRPC_ERROR_NONE);
     gpr_mu_unlock(&mu);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_AcquireMutex);
@@ -195,16 +192,16 @@ static void BM_TryAcquireMutex(benchmark::State& state) {
   // for comparison with the combiner stuff below
   gpr_mu mu;
   gpr_mu_init(&mu);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     if (gpr_mu_trylock(&mu)) {
-      DoNothing(&exec_ctx, nullptr, GRPC_ERROR_NONE);
+      DoNothing(nullptr, GRPC_ERROR_NONE);
       gpr_mu_unlock(&mu);
     } else {
       abort();
     }
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_TryAcquireMutex);
@@ -213,13 +210,13 @@ static void BM_AcquireSpinlock(benchmark::State& state) {
   TrackCounters track_counters;
   // for comparison with the combiner stuff below
   gpr_spinlock mu = GPR_SPINLOCK_INITIALIZER;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     gpr_spinlock_lock(&mu);
-    DoNothing(&exec_ctx, nullptr, GRPC_ERROR_NONE);
+    DoNothing(nullptr, GRPC_ERROR_NONE);
     gpr_spinlock_unlock(&mu);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_AcquireSpinlock);
@@ -228,16 +225,16 @@ static void BM_TryAcquireSpinlock(benchmark::State& state) {
   TrackCounters track_counters;
   // for comparison with the combiner stuff below
   gpr_spinlock mu = GPR_SPINLOCK_INITIALIZER;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     if (gpr_spinlock_trylock(&mu)) {
-      DoNothing(&exec_ctx, nullptr, GRPC_ERROR_NONE);
+      DoNothing(nullptr, GRPC_ERROR_NONE);
       gpr_spinlock_unlock(&mu);
     } else {
       abort();
     }
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_TryAcquireSpinlock);
@@ -247,13 +244,13 @@ static void BM_ClosureSchedOnCombiner(benchmark::State& state) {
   grpc_combiner* combiner = grpc_combiner_create();
   grpc_closure c;
   GRPC_CLOSURE_INIT(&c, DoNothing, nullptr, grpc_combiner_scheduler(combiner));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSchedOnCombiner);
@@ -265,14 +262,14 @@ static void BM_ClosureSched2OnCombiner(benchmark::State& state) {
   grpc_closure c2;
   GRPC_CLOSURE_INIT(&c1, DoNothing, nullptr, grpc_combiner_scheduler(combiner));
   GRPC_CLOSURE_INIT(&c2, DoNothing, nullptr, grpc_combiner_scheduler(combiner));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c1, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c2, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c1, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c2, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSched2OnCombiner);
@@ -286,15 +283,15 @@ static void BM_ClosureSched3OnCombiner(benchmark::State& state) {
   GRPC_CLOSURE_INIT(&c1, DoNothing, nullptr, grpc_combiner_scheduler(combiner));
   GRPC_CLOSURE_INIT(&c2, DoNothing, nullptr, grpc_combiner_scheduler(combiner));
   GRPC_CLOSURE_INIT(&c3, DoNothing, nullptr, grpc_combiner_scheduler(combiner));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c1, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c2, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c3, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c1, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c2, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c3, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSched3OnCombiner);
@@ -309,15 +306,15 @@ static void BM_ClosureSched2OnTwoCombiners(benchmark::State& state) {
                     grpc_combiner_scheduler(combiner1));
   GRPC_CLOSURE_INIT(&c2, DoNothing, nullptr,
                     grpc_combiner_scheduler(combiner2));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c1, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c2, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c1, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c2, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner1, "finished");
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner2, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner1, "finished");
+  GRPC_COMBINER_UNREF(combiner2, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSched2OnTwoCombiners);
@@ -338,17 +335,17 @@ static void BM_ClosureSched4OnTwoCombiners(benchmark::State& state) {
                     grpc_combiner_scheduler(combiner1));
   GRPC_CLOSURE_INIT(&c4, DoNothing, nullptr,
                     grpc_combiner_scheduler(combiner2));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c1, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c2, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c3, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c4, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c1, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c2, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c3, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c4, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner1, "finished");
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner2, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner1, "finished");
+  GRPC_COMBINER_UNREF(combiner2, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSched4OnTwoCombiners);
@@ -362,13 +359,11 @@ class Rescheduler {
     GRPC_CLOSURE_INIT(&closure_, Step, this, scheduler);
   }
 
-  void ScheduleFirst(grpc_exec_ctx* exec_ctx) {
-    GRPC_CLOSURE_SCHED(exec_ctx, &closure_, GRPC_ERROR_NONE);
-  }
+  void ScheduleFirst() { GRPC_CLOSURE_SCHED(&closure_, GRPC_ERROR_NONE); }
 
   void ScheduleFirstAgainstDifferentScheduler(
-      grpc_exec_ctx* exec_ctx, grpc_closure_scheduler* scheduler) {
-    GRPC_CLOSURE_SCHED(exec_ctx, GRPC_CLOSURE_CREATE(Step, this, scheduler),
+      grpc_closure_scheduler* scheduler) {
+    GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(Step, this, scheduler),
                        GRPC_ERROR_NONE);
   }
 
@@ -376,47 +371,46 @@ class Rescheduler {
   benchmark::State& state_;
   grpc_closure closure_;
 
-  static void Step(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+  static void Step(void* arg, grpc_error* error) {
     Rescheduler* self = static_cast<Rescheduler*>(arg);
     if (self->state_.KeepRunning()) {
-      GRPC_CLOSURE_SCHED(exec_ctx, &self->closure_, GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(&self->closure_, GRPC_ERROR_NONE);
     }
   }
 };
 
 static void BM_ClosureReschedOnExecCtx(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   Rescheduler r(state, grpc_schedule_on_exec_ctx);
-  r.ScheduleFirst(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  r.ScheduleFirst();
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureReschedOnExecCtx);
 
 static void BM_ClosureReschedOnCombiner(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_combiner* combiner = grpc_combiner_create();
   Rescheduler r(state, grpc_combiner_scheduler(combiner));
-  r.ScheduleFirst(&exec_ctx);
-  grpc_exec_ctx_flush(&exec_ctx);
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  r.ScheduleFirst();
+  grpc_core::ExecCtx::Get()->Flush();
+  GRPC_COMBINER_UNREF(combiner, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureReschedOnCombiner);
 
 static void BM_ClosureReschedOnCombinerFinally(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_combiner* combiner = grpc_combiner_create();
   Rescheduler r(state, grpc_combiner_finally_scheduler(combiner));
-  r.ScheduleFirstAgainstDifferentScheduler(&exec_ctx,
-                                           grpc_combiner_scheduler(combiner));
-  grpc_exec_ctx_flush(&exec_ctx);
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  r.ScheduleFirstAgainstDifferentScheduler(grpc_combiner_scheduler(combiner));
+  grpc_core::ExecCtx::Get()->Flush();
+  GRPC_COMBINER_UNREF(combiner, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureReschedOnCombinerFinally);
diff --git a/test/cpp/microbenchmarks/bm_cq.cc b/test/cpp/microbenchmarks/bm_cq.cc
index f0dede7333..97242598f1 100644
--- a/test/cpp/microbenchmarks/bm_cq.cc
+++ b/test/cpp/microbenchmarks/bm_cq.cc
@@ -66,7 +66,7 @@ static void BM_CreateDestroyCore(benchmark::State& state) {
 }
 BENCHMARK(BM_CreateDestroyCore);
 
-static void DoneWithCompletionOnStack(grpc_exec_ctx* exec_ctx, void* arg,
+static void DoneWithCompletionOnStack(void* arg,
                                       grpc_cq_completion* completion) {}
 
 class DummyTag final : public internal::CompletionQueueTag {
@@ -81,11 +81,11 @@ static void BM_Pass1Cpp(benchmark::State& state) {
   while (state.KeepRunning()) {
     grpc_cq_completion completion;
     DummyTag dummy_tag;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     GPR_ASSERT(grpc_cq_begin_op(c_cq, &dummy_tag));
-    grpc_cq_end_op(&exec_ctx, c_cq, &dummy_tag, GRPC_ERROR_NONE,
-                   DoneWithCompletionOnStack, nullptr, &completion);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_cq_end_op(c_cq, &dummy_tag, GRPC_ERROR_NONE, DoneWithCompletionOnStack,
+                   nullptr, &completion);
+
     void* tag;
     bool ok;
     cq.Next(&tag, &ok);
@@ -101,11 +101,11 @@ static void BM_Pass1Core(benchmark::State& state) {
   gpr_timespec deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
   while (state.KeepRunning()) {
     grpc_cq_completion completion;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     GPR_ASSERT(grpc_cq_begin_op(cq, nullptr));
-    grpc_cq_end_op(&exec_ctx, cq, nullptr, GRPC_ERROR_NONE,
-                   DoneWithCompletionOnStack, nullptr, &completion);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_cq_end_op(cq, nullptr, GRPC_ERROR_NONE, DoneWithCompletionOnStack,
+                   nullptr, &completion);
+
     grpc_completion_queue_next(cq, deadline, nullptr);
   }
   grpc_completion_queue_destroy(cq);
@@ -120,11 +120,11 @@ static void BM_Pluck1Core(benchmark::State& state) {
   gpr_timespec deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
   while (state.KeepRunning()) {
     grpc_cq_completion completion;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     GPR_ASSERT(grpc_cq_begin_op(cq, nullptr));
-    grpc_cq_end_op(&exec_ctx, cq, nullptr, GRPC_ERROR_NONE,
-                   DoneWithCompletionOnStack, nullptr, &completion);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_cq_end_op(cq, nullptr, GRPC_ERROR_NONE, DoneWithCompletionOnStack,
+                   nullptr, &completion);
+
     grpc_completion_queue_pluck(cq, nullptr, deadline, nullptr);
   }
   grpc_completion_queue_destroy(cq);
diff --git a/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc b/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
index 7ccebb55ee..874c834931 100644
--- a/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
+++ b/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
@@ -43,9 +43,8 @@ static grpc_completion_queue* g_cq;
 static grpc_event_engine_vtable g_vtable;
 static const grpc_event_engine_vtable* g_old_vtable;
 
-static void pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* ps,
-                             grpc_closure* closure) {
-  GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+static void pollset_shutdown(grpc_pollset* ps, grpc_closure* closure) {
+  GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
 }
 
 static void pollset_init(grpc_pollset* ps, gpr_mu** mu) {
@@ -53,25 +52,20 @@ static void pollset_init(grpc_pollset* ps, gpr_mu** mu) {
   *mu = &ps->mu;
 }
 
-static void pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* ps) {
-  gpr_mu_destroy(&ps->mu);
-}
+static void pollset_destroy(grpc_pollset* ps) { gpr_mu_destroy(&ps->mu); }
 
-static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
-                                grpc_pollset_worker* worker) {
+static grpc_error* pollset_kick(grpc_pollset* p, grpc_pollset_worker* worker) {
   return GRPC_ERROR_NONE;
 }
 
 /* Callback when the tag is dequeued from the completion queue. Does nothing */
-static void cq_done_cb(grpc_exec_ctx* exec_ctx, void* done_arg,
-                       grpc_cq_completion* cq_completion) {
+static void cq_done_cb(void* done_arg, grpc_cq_completion* cq_completion) {
   gpr_free(cq_completion);
 }
 
 /* Queues a completion tag if deadline is > 0.
  * Does nothing if deadline is 0 (i.e gpr_time_0(GPR_CLOCK_MONOTONIC)) */
-static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* ps,
-                                grpc_pollset_worker** worker,
+static grpc_error* pollset_work(grpc_pollset* ps, grpc_pollset_worker** worker,
                                 grpc_millis deadline) {
   if (deadline == 0) {
     gpr_log(GPR_DEBUG, "no-op");
@@ -80,9 +74,9 @@ static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* ps,
 
   gpr_mu_unlock(&ps->mu);
   GPR_ASSERT(grpc_cq_begin_op(g_cq, g_tag));
-  grpc_cq_end_op(exec_ctx, g_cq, g_tag, GRPC_ERROR_NONE, cq_done_cb, nullptr,
+  grpc_cq_end_op(g_cq, g_tag, GRPC_ERROR_NONE, cq_done_cb, nullptr,
                  (grpc_cq_completion*)gpr_malloc(sizeof(grpc_cq_completion)));
-  grpc_exec_ctx_flush(exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_mu_lock(&ps->mu);
   return GRPC_ERROR_NONE;
 }
diff --git a/test/cpp/microbenchmarks/bm_error.cc b/test/cpp/microbenchmarks/bm_error.cc
index bbd8b3c339..d12f475a49 100644
--- a/test/cpp/microbenchmarks/bm_error.cc
+++ b/test/cpp/microbenchmarks/bm_error.cc
@@ -246,14 +246,14 @@ template <class Fixture>
 static void BM_ErrorGetStatus(benchmark::State& state) {
   TrackCounters track_counters;
   Fixture fixture;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     grpc_status_code status;
     grpc_slice slice;
-    grpc_error_get_status(&exec_ctx, fixture.error(), fixture.deadline(),
-                          &status, &slice, nullptr, nullptr);
+    grpc_error_get_status(fixture.error(), fixture.deadline(), &status, &slice,
+                          nullptr, nullptr);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 
@@ -261,13 +261,13 @@ template <class Fixture>
 static void BM_ErrorGetStatusCode(benchmark::State& state) {
   TrackCounters track_counters;
   Fixture fixture;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     grpc_status_code status;
-    grpc_error_get_status(&exec_ctx, fixture.error(), fixture.deadline(),
-                          &status, nullptr, nullptr, nullptr);
+    grpc_error_get_status(fixture.error(), fixture.deadline(), &status, nullptr,
+                          nullptr, nullptr);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 
@@ -275,13 +275,13 @@ template <class Fixture>
 static void BM_ErrorHttpError(benchmark::State& state) {
   TrackCounters track_counters;
   Fixture fixture;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     grpc_http2_error_code error;
-    grpc_error_get_status(&exec_ctx, fixture.error(), fixture.deadline(),
-                          nullptr, nullptr, &error, nullptr);
+    grpc_error_get_status(fixture.error(), fixture.deadline(), nullptr, nullptr,
+                          &error, nullptr);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 
diff --git a/test/cpp/microbenchmarks/bm_fullstack_trickle.cc b/test/cpp/microbenchmarks/bm_fullstack_trickle.cc
index 5e72213823..d6d7d41e5e 100644
--- a/test/cpp/microbenchmarks/bm_fullstack_trickle.cc
+++ b/test/cpp/microbenchmarks/bm_fullstack_trickle.cc
@@ -177,13 +177,13 @@ class TrickledCHTTP2 : public EndpointPairFixture {
   }
 
   void Step(bool update_stats) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     inc_time();
     size_t client_backlog =
-        grpc_trickle_endpoint_trickle(&exec_ctx, endpoint_pair_.client);
+        grpc_trickle_endpoint_trickle(endpoint_pair_.client);
     size_t server_backlog =
-        grpc_trickle_endpoint_trickle(&exec_ctx, endpoint_pair_.server);
-    grpc_exec_ctx_finish(&exec_ctx);
+        grpc_trickle_endpoint_trickle(endpoint_pair_.server);
+
     if (update_stats) {
       UpdateStats((grpc_chttp2_transport*)client_transport_, &client_stats_,
                   client_backlog);
diff --git a/test/cpp/microbenchmarks/bm_metadata.cc b/test/cpp/microbenchmarks/bm_metadata.cc
index 73bce08466..f1e7890fc0 100644
--- a/test/cpp/microbenchmarks/bm_metadata.cc
+++ b/test/cpp/microbenchmarks/bm_metadata.cc
@@ -90,11 +90,11 @@ static void BM_MetadataFromNonInternedSlices(benchmark::State& state) {
   TrackCounters track_counters;
   gpr_slice k = grpc_slice_from_static_string("key");
   gpr_slice v = grpc_slice_from_static_string("value");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, grpc_mdelem_create(&exec_ctx, k, v, nullptr));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_MetadataFromNonInternedSlices);
@@ -103,11 +103,11 @@ static void BM_MetadataFromInternedSlices(benchmark::State& state) {
   TrackCounters track_counters;
   gpr_slice k = grpc_slice_intern(grpc_slice_from_static_string("key"));
   gpr_slice v = grpc_slice_intern(grpc_slice_from_static_string("value"));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, grpc_mdelem_create(&exec_ctx, k, v, nullptr));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_slice_unref(k);
   grpc_slice_unref(v);
   track_counters.Finish(state);
@@ -119,13 +119,13 @@ static void BM_MetadataFromInternedSlicesAlreadyInIndex(
   TrackCounters track_counters;
   gpr_slice k = grpc_slice_intern(grpc_slice_from_static_string("key"));
   gpr_slice v = grpc_slice_intern(grpc_slice_from_static_string("value"));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_mdelem seed = grpc_mdelem_create(&exec_ctx, k, v, nullptr);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_mdelem seed = grpc_mdelem_create(k, v, nullptr);
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, grpc_mdelem_create(&exec_ctx, k, v, nullptr));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, seed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(seed);
+
   grpc_slice_unref(k);
   grpc_slice_unref(v);
   track_counters.Finish(state);
@@ -136,11 +136,11 @@ static void BM_MetadataFromInternedKey(benchmark::State& state) {
   TrackCounters track_counters;
   gpr_slice k = grpc_slice_intern(grpc_slice_from_static_string("key"));
   gpr_slice v = grpc_slice_from_static_string("value");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, grpc_mdelem_create(&exec_ctx, k, v, nullptr));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_slice_unref(k);
   track_counters.Finish(state);
 }
@@ -152,14 +152,12 @@ static void BM_MetadataFromNonInternedSlicesWithBackingStore(
   gpr_slice k = grpc_slice_from_static_string("key");
   gpr_slice v = grpc_slice_from_static_string("value");
   char backing_store[sizeof(grpc_mdelem_data)];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(
-        &exec_ctx,
-        grpc_mdelem_create(&exec_ctx, k, v,
-                           reinterpret_cast<grpc_mdelem_data*>(backing_store)));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(
+        k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store)));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_MetadataFromNonInternedSlicesWithBackingStore);
@@ -170,14 +168,12 @@ static void BM_MetadataFromInternedSlicesWithBackingStore(
   gpr_slice k = grpc_slice_intern(grpc_slice_from_static_string("key"));
   gpr_slice v = grpc_slice_intern(grpc_slice_from_static_string("value"));
   char backing_store[sizeof(grpc_mdelem_data)];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(
-        &exec_ctx,
-        grpc_mdelem_create(&exec_ctx, k, v,
-                           reinterpret_cast<grpc_mdelem_data*>(backing_store)));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(
+        k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store)));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_slice_unref(k);
   grpc_slice_unref(v);
   track_counters.Finish(state);
@@ -190,14 +186,12 @@ static void BM_MetadataFromInternedKeyWithBackingStore(
   gpr_slice k = grpc_slice_intern(grpc_slice_from_static_string("key"));
   gpr_slice v = grpc_slice_from_static_string("value");
   char backing_store[sizeof(grpc_mdelem_data)];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(
-        &exec_ctx,
-        grpc_mdelem_create(&exec_ctx, k, v,
-                           reinterpret_cast<grpc_mdelem_data*>(backing_store)));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(
+        k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store)));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_slice_unref(k);
   track_counters.Finish(state);
 }
@@ -207,11 +201,11 @@ static void BM_MetadataFromStaticMetadataStrings(benchmark::State& state) {
   TrackCounters track_counters;
   gpr_slice k = GRPC_MDSTR_STATUS;
   gpr_slice v = GRPC_MDSTR_200;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, grpc_mdelem_create(&exec_ctx, k, v, nullptr));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_slice_unref(k);
   track_counters.Finish(state);
 }
@@ -222,11 +216,11 @@ static void BM_MetadataFromStaticMetadataStringsNotIndexed(
   TrackCounters track_counters;
   gpr_slice k = GRPC_MDSTR_STATUS;
   gpr_slice v = GRPC_MDSTR_GZIP;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, grpc_mdelem_create(&exec_ctx, k, v, nullptr));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_slice_unref(k);
   track_counters.Finish(state);
 }
@@ -235,16 +229,15 @@ BENCHMARK(BM_MetadataFromStaticMetadataStringsNotIndexed);
 static void BM_MetadataRefUnrefExternal(benchmark::State& state) {
   TrackCounters track_counters;
   char backing_store[sizeof(grpc_mdelem_data)];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_mdelem el =
-      grpc_mdelem_create(&exec_ctx, grpc_slice_from_static_string("a"),
-                         grpc_slice_from_static_string("b"),
-                         reinterpret_cast<grpc_mdelem_data*>(backing_store));
+  grpc_core::ExecCtx exec_ctx;
+  grpc_mdelem el = grpc_mdelem_create(
+      grpc_slice_from_static_string("a"), grpc_slice_from_static_string("b"),
+      reinterpret_cast<grpc_mdelem_data*>(backing_store));
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, GRPC_MDELEM_REF(el));
+    GRPC_MDELEM_UNREF(GRPC_MDELEM_REF(el));
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, el);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(el);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_MetadataRefUnrefExternal);
@@ -252,47 +245,47 @@ BENCHMARK(BM_MetadataRefUnrefExternal);
 static void BM_MetadataRefUnrefInterned(benchmark::State& state) {
   TrackCounters track_counters;
   char backing_store[sizeof(grpc_mdelem_data)];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_slice k = grpc_slice_intern(grpc_slice_from_static_string("key"));
   gpr_slice v = grpc_slice_intern(grpc_slice_from_static_string("value"));
   grpc_mdelem el = grpc_mdelem_create(
-      &exec_ctx, k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store));
+      k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store));
   grpc_slice_unref(k);
   grpc_slice_unref(v);
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, GRPC_MDELEM_REF(el));
+    GRPC_MDELEM_UNREF(GRPC_MDELEM_REF(el));
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, el);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(el);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_MetadataRefUnrefInterned);
 
 static void BM_MetadataRefUnrefAllocated(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem el =
-      grpc_mdelem_create(&exec_ctx, grpc_slice_from_static_string("a"),
+      grpc_mdelem_create(grpc_slice_from_static_string("a"),
                          grpc_slice_from_static_string("b"), nullptr);
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, GRPC_MDELEM_REF(el));
+    GRPC_MDELEM_UNREF(GRPC_MDELEM_REF(el));
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, el);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(el);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_MetadataRefUnrefAllocated);
 
 static void BM_MetadataRefUnrefStatic(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem el =
-      grpc_mdelem_create(&exec_ctx, GRPC_MDSTR_STATUS, GRPC_MDSTR_200, nullptr);
+      grpc_mdelem_create(GRPC_MDSTR_STATUS, GRPC_MDSTR_200, nullptr);
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, GRPC_MDELEM_REF(el));
+    GRPC_MDELEM_UNREF(GRPC_MDELEM_REF(el));
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, el);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(el);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_MetadataRefUnrefStatic);
diff --git a/test/cpp/microbenchmarks/bm_pollset.cc b/test/cpp/microbenchmarks/bm_pollset.cc
index 4da79693f1..d9d5164cce 100644
--- a/test/cpp/microbenchmarks/bm_pollset.cc
+++ b/test/cpp/microbenchmarks/bm_pollset.cc
@@ -41,8 +41,8 @@
 
 auto& force_library_initialization = Library::get();
 
-static void shutdown_ps(grpc_exec_ctx* exec_ctx, void* ps, grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(ps));
+static void shutdown_ps(void* ps, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(ps));
 }
 
 static void BM_CreateDestroyPollset(benchmark::State& state) {
@@ -50,7 +50,7 @@ static void BM_CreateDestroyPollset(benchmark::State& state) {
   size_t ps_sz = grpc_pollset_size();
   grpc_pollset* ps = static_cast<grpc_pollset*>(gpr_malloc(ps_sz));
   gpr_mu* mu;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_closure shutdown_ps_closure;
   GRPC_CLOSURE_INIT(&shutdown_ps_closure, shutdown_ps, ps,
                     grpc_schedule_on_exec_ctx);
@@ -58,11 +58,11 @@ static void BM_CreateDestroyPollset(benchmark::State& state) {
     memset(ps, 0, ps_sz);
     grpc_pollset_init(ps, &mu);
     gpr_mu_lock(mu);
-    grpc_pollset_shutdown(&exec_ctx, ps, &shutdown_ps_closure);
+    grpc_pollset_shutdown(ps, &shutdown_ps_closure);
     gpr_mu_unlock(mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(ps);
   track_counters.Finish(state);
 }
@@ -114,17 +114,17 @@ static void BM_PollEmptyPollset(benchmark::State& state) {
   grpc_pollset* ps = static_cast<grpc_pollset*>(gpr_zalloc(ps_sz));
   gpr_mu* mu;
   grpc_pollset_init(ps, &mu);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_mu_lock(mu);
   while (state.KeepRunning()) {
-    GRPC_ERROR_UNREF(grpc_pollset_work(&exec_ctx, ps, nullptr, 0));
+    GRPC_ERROR_UNREF(grpc_pollset_work(ps, nullptr, 0));
   }
   grpc_closure shutdown_ps_closure;
   GRPC_CLOSURE_INIT(&shutdown_ps_closure, shutdown_ps, ps,
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, ps, &shutdown_ps_closure);
+  grpc_pollset_shutdown(ps, &shutdown_ps_closure);
   gpr_mu_unlock(mu);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(ps);
   track_counters.Finish(state);
 }
@@ -136,24 +136,23 @@ static void BM_PollAddFd(benchmark::State& state) {
   grpc_pollset* ps = static_cast<grpc_pollset*>(gpr_zalloc(ps_sz));
   gpr_mu* mu;
   grpc_pollset_init(ps, &mu);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_wakeup_fd wakeup_fd;
   GPR_ASSERT(
       GRPC_LOG_IF_ERROR("wakeup_fd_init", grpc_wakeup_fd_init(&wakeup_fd)));
   grpc_fd* fd = grpc_fd_create(wakeup_fd.read_fd, "xxx");
   while (state.KeepRunning()) {
-    grpc_pollset_add_fd(&exec_ctx, ps, fd);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_pollset_add_fd(ps, fd);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_fd_orphan(&exec_ctx, fd, nullptr, nullptr, false /* already_closed */,
-                 "xxx");
+  grpc_fd_orphan(fd, nullptr, nullptr, false /* already_closed */, "xxx");
   grpc_closure shutdown_ps_closure;
   GRPC_CLOSURE_INIT(&shutdown_ps_closure, shutdown_ps, ps,
                     grpc_schedule_on_exec_ctx);
   gpr_mu_lock(mu);
-  grpc_pollset_shutdown(&exec_ctx, ps, &shutdown_ps_closure);
+  grpc_pollset_shutdown(ps, &shutdown_ps_closure);
   gpr_mu_unlock(mu);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(ps);
   track_counters.Finish(state);
 }
@@ -170,7 +169,7 @@ Closure* MakeClosure(F f, grpc_closure_scheduler* scheduler) {
     C(F f, grpc_closure_scheduler* scheduler) : f_(f) {
       GRPC_CLOSURE_INIT(this, C::cbfn, this, scheduler);
     }
-    static void cbfn(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+    static void cbfn(void* arg, grpc_error* error) {
       C* p = static_cast<C*>(arg);
       p->f_();
     }
@@ -219,11 +218,11 @@ static void BM_SingleThreadPollOneFd(benchmark::State& state) {
   grpc_pollset* ps = static_cast<grpc_pollset*>(gpr_zalloc(ps_sz));
   gpr_mu* mu;
   grpc_pollset_init(ps, &mu);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_wakeup_fd wakeup_fd;
   GRPC_ERROR_UNREF(grpc_wakeup_fd_init(&wakeup_fd));
   grpc_fd* wakeup = grpc_fd_create(wakeup_fd.read_fd, "wakeup_read");
-  grpc_pollset_add_fd(&exec_ctx, ps, wakeup);
+  grpc_pollset_add_fd(ps, wakeup);
   bool done = false;
   Closure* continue_closure = MakeClosure(
       [&]() {
@@ -233,25 +232,23 @@ static void BM_SingleThreadPollOneFd(benchmark::State& state) {
           return;
         }
         GRPC_ERROR_UNREF(grpc_wakeup_fd_wakeup(&wakeup_fd));
-        grpc_fd_notify_on_read(&exec_ctx, wakeup, continue_closure);
+        grpc_fd_notify_on_read(wakeup, continue_closure);
       },
       grpc_schedule_on_exec_ctx);
   GRPC_ERROR_UNREF(grpc_wakeup_fd_wakeup(&wakeup_fd));
-  grpc_fd_notify_on_read(&exec_ctx, wakeup, continue_closure);
+  grpc_fd_notify_on_read(wakeup, continue_closure);
   gpr_mu_lock(mu);
   while (!done) {
-    GRPC_ERROR_UNREF(
-        grpc_pollset_work(&exec_ctx, ps, nullptr, GRPC_MILLIS_INF_FUTURE));
+    GRPC_ERROR_UNREF(grpc_pollset_work(ps, nullptr, GRPC_MILLIS_INF_FUTURE));
   }
-  grpc_fd_orphan(&exec_ctx, wakeup, nullptr, nullptr,
-                 false /* already_closed */, "done");
+  grpc_fd_orphan(wakeup, nullptr, nullptr, false /* already_closed */, "done");
   wakeup_fd.read_fd = 0;
   grpc_closure shutdown_ps_closure;
   GRPC_CLOSURE_INIT(&shutdown_ps_closure, shutdown_ps, ps,
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, ps, &shutdown_ps_closure);
+  grpc_pollset_shutdown(ps, &shutdown_ps_closure);
   gpr_mu_unlock(mu);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   grpc_wakeup_fd_destroy(&wakeup_fd);
   gpr_free(ps);
   track_counters.Finish(state);
diff --git a/test/cpp/microbenchmarks/fullstack_fixtures.h b/test/cpp/microbenchmarks/fullstack_fixtures.h
index 7e20843875..d1ede755a5 100644
--- a/test/cpp/microbenchmarks/fullstack_fixtures.h
+++ b/test/cpp/microbenchmarks/fullstack_fixtures.h
@@ -166,7 +166,7 @@ class EndpointPairFixture : public BaseFixture {
     fixture_configuration.ApplyCommonServerBuilderConfig(&b);
     server_ = b.BuildAndStart();
 
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
 
     /* add server endpoint to server_
      * */
@@ -174,20 +174,19 @@ class EndpointPairFixture : public BaseFixture {
       const grpc_channel_args* server_args =
           grpc_server_get_channel_args(server_->c_server());
       server_transport_ = grpc_create_chttp2_transport(
-          &exec_ctx, server_args, endpoints.server, false /* is_client */);
+          server_args, endpoints.server, false /* is_client */);
 
       grpc_pollset** pollsets;
       size_t num_pollsets = 0;
       grpc_server_get_pollsets(server_->c_server(), &pollsets, &num_pollsets);
 
       for (size_t i = 0; i < num_pollsets; i++) {
-        grpc_endpoint_add_to_pollset(&exec_ctx, endpoints.server, pollsets[i]);
+        grpc_endpoint_add_to_pollset(endpoints.server, pollsets[i]);
       }
 
-      grpc_server_setup_transport(&exec_ctx, server_->c_server(),
-                                  server_transport_, nullptr, server_args);
-      grpc_chttp2_transport_start_reading(&exec_ctx, server_transport_, nullptr,
-                                          nullptr);
+      grpc_server_setup_transport(server_->c_server(), server_transport_,
+                                  nullptr, server_args);
+      grpc_chttp2_transport_start_reading(server_transport_, nullptr, nullptr);
     }
 
     /* create channel */
@@ -197,19 +196,15 @@ class EndpointPairFixture : public BaseFixture {
       fixture_configuration.ApplyCommonChannelArguments(&args);
 
       grpc_channel_args c_args = args.c_channel_args();
-      client_transport_ = grpc_create_chttp2_transport(&exec_ctx, &c_args,
-                                                       endpoints.client, true);
+      client_transport_ =
+          grpc_create_chttp2_transport(&c_args, endpoints.client, true);
       GPR_ASSERT(client_transport_);
-      grpc_channel* channel =
-          grpc_channel_create(&exec_ctx, "target", &c_args,
-                              GRPC_CLIENT_DIRECT_CHANNEL, client_transport_);
-      grpc_chttp2_transport_start_reading(&exec_ctx, client_transport_, nullptr,
-                                          nullptr);
+      grpc_channel* channel = grpc_channel_create(
+          "target", &c_args, GRPC_CLIENT_DIRECT_CHANNEL, client_transport_);
+      grpc_chttp2_transport_start_reading(client_transport_, nullptr, nullptr);
 
       channel_ = CreateChannelInternal("", channel);
     }
-
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 
   virtual ~EndpointPairFixture() {
diff --git a/test/cpp/naming/resolver_component_test.cc b/test/cpp/naming/resolver_component_test.cc
index 6f1f0c44b9..3481d9d1aa 100644
--- a/test/cpp/naming/resolver_component_test.cc
+++ b/test/cpp/naming/resolver_component_test.cc
@@ -149,33 +149,33 @@ struct ArgsStruct {
   std::string expected_lb_policy;
 };
 
-void ArgsInit(grpc_exec_ctx* exec_ctx, ArgsStruct* args) {
+void ArgsInit(ArgsStruct* args) {
   gpr_event_init(&args->ev);
   args->pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
   grpc_pollset_init(args->pollset, &args->mu);
   args->pollset_set = grpc_pollset_set_create();
-  grpc_pollset_set_add_pollset(exec_ctx, args->pollset_set, args->pollset);
+  grpc_pollset_set_add_pollset(args->pollset_set, args->pollset);
   args->lock = grpc_combiner_create();
   gpr_atm_rel_store(&args->done_atm, 0);
   args->channel_args = nullptr;
 }
 
-void DoNothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+void DoNothing(void* arg, grpc_error* error) {}
 
-void ArgsFinish(grpc_exec_ctx* exec_ctx, ArgsStruct* args) {
+void ArgsFinish(ArgsStruct* args) {
   GPR_ASSERT(gpr_event_wait(&args->ev, TestDeadline()));
-  grpc_pollset_set_del_pollset(exec_ctx, args->pollset_set, args->pollset);
-  grpc_pollset_set_destroy(exec_ctx, args->pollset_set);
+  grpc_pollset_set_del_pollset(args->pollset_set, args->pollset);
+  grpc_pollset_set_destroy(args->pollset_set);
   grpc_closure DoNothing_cb;
   GRPC_CLOSURE_INIT(&DoNothing_cb, DoNothing, nullptr,
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(exec_ctx, args->pollset, &DoNothing_cb);
+  grpc_pollset_shutdown(args->pollset, &DoNothing_cb);
   // exec_ctx needs to be flushed before calling grpc_pollset_destroy()
-  grpc_channel_args_destroy(exec_ctx, args->channel_args);
-  grpc_exec_ctx_flush(exec_ctx);
-  grpc_pollset_destroy(exec_ctx, args->pollset);
+  grpc_channel_args_destroy(args->channel_args);
+  grpc_core::ExecCtx::Get()->Flush();
+  grpc_pollset_destroy(args->pollset);
   gpr_free(args->pollset);
-  GRPC_COMBINER_UNREF(exec_ctx, args->lock, NULL);
+  GRPC_COMBINER_UNREF(args->lock, nullptr);
 }
 
 gpr_timespec NSecondDeadline(int seconds) {
@@ -196,14 +196,13 @@ void PollPollsetUntilRequestDone(ArgsStruct* args) {
             time_left.tv_sec, time_left.tv_nsec);
     GPR_ASSERT(gpr_time_cmp(time_left, gpr_time_0(GPR_TIMESPAN)) >= 0);
     grpc_pollset_worker* worker = nullptr;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     gpr_mu_lock(args->mu);
     GRPC_LOG_IF_ERROR("pollset_work",
-                      grpc_pollset_work(&exec_ctx, args->pollset, &worker,
+                      grpc_pollset_work(args->pollset, &worker,
                                         grpc_timespec_to_millis_round_up(
                                             NSecondDeadline(1))));
     gpr_mu_unlock(args->mu);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
   gpr_event_set(&args->ev, (void*)1);
 }
@@ -235,8 +234,7 @@ void CheckLBPolicyResultLocked(grpc_channel_args* channel_args,
   }
 }
 
-void CheckResolverResultLocked(grpc_exec_ctx* exec_ctx, void* argsp,
-                               grpc_error* err) {
+void CheckResolverResultLocked(void* argsp, grpc_error* err) {
   ArgsStruct* args = (ArgsStruct*)argsp;
   grpc_channel_args* channel_args = args->channel_args;
   const grpc_arg* channel_arg =
@@ -272,15 +270,14 @@ void CheckResolverResultLocked(grpc_exec_ctx* exec_ctx, void* argsp,
   }
   gpr_atm_rel_store(&args->done_atm, 1);
   gpr_mu_lock(args->mu);
-  GRPC_LOG_IF_ERROR("pollset_kick",
-                    grpc_pollset_kick(exec_ctx, args->pollset, nullptr));
+  GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(args->pollset, nullptr));
   gpr_mu_unlock(args->mu);
 }
 
 TEST(ResolverComponentTest, TestResolvesRelevantRecords) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   ArgsStruct args;
-  ArgsInit(&exec_ctx, &args);
+  ArgsInit(&args);
   args.expected_addrs = ParseExpectedAddrs(FLAGS_expected_addrs);
   args.expected_service_config_string = FLAGS_expected_chosen_service_config;
   args.expected_lb_policy = FLAGS_expected_lb_policy;
@@ -290,19 +287,18 @@ TEST(ResolverComponentTest, TestResolvesRelevantRecords) {
                       FLAGS_local_dns_server_address.c_str(),
                       FLAGS_target_name.c_str()));
   // create resolver and resolve
-  grpc_resolver* resolver = grpc_resolver_create(&exec_ctx, whole_uri, nullptr,
-                                                 args.pollset_set, args.lock);
+  grpc_resolver* resolver =
+      grpc_resolver_create(whole_uri, nullptr, args.pollset_set, args.lock);
   gpr_free(whole_uri);
   grpc_closure on_resolver_result_changed;
   GRPC_CLOSURE_INIT(&on_resolver_result_changed, CheckResolverResultLocked,
                     (void*)&args, grpc_combiner_scheduler(args.lock));
-  grpc_resolver_next_locked(&exec_ctx, resolver, &args.channel_args,
+  grpc_resolver_next_locked(resolver, &args.channel_args,
                             &on_resolver_result_changed);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   PollPollsetUntilRequestDone(&args);
-  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, NULL);
-  ArgsFinish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_RESOLVER_UNREF(resolver, nullptr);
+  ArgsFinish(&args);
 }
 
 }  // namespace
diff --git a/test/cpp/performance/writes_per_rpc_test.cc b/test/cpp/performance/writes_per_rpc_test.cc
index 1c6f44dd7d..0b9dc83f2b 100644
--- a/test/cpp/performance/writes_per_rpc_test.cc
+++ b/test/cpp/performance/writes_per_rpc_test.cc
@@ -82,27 +82,26 @@ class EndpointPairFixture {
     ApplyCommonServerBuilderConfig(&b);
     server_ = b.BuildAndStart();
 
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
 
     /* add server endpoint to server_ */
     {
       const grpc_channel_args* server_args =
           grpc_server_get_channel_args(server_->c_server());
       grpc_transport* transport = grpc_create_chttp2_transport(
-          &exec_ctx, server_args, endpoints.server, false /* is_client */);
+          server_args, endpoints.server, false /* is_client */);
 
       grpc_pollset** pollsets;
       size_t num_pollsets = 0;
       grpc_server_get_pollsets(server_->c_server(), &pollsets, &num_pollsets);
 
       for (size_t i = 0; i < num_pollsets; i++) {
-        grpc_endpoint_add_to_pollset(&exec_ctx, endpoints.server, pollsets[i]);
+        grpc_endpoint_add_to_pollset(endpoints.server, pollsets[i]);
       }
 
-      grpc_server_setup_transport(&exec_ctx, server_->c_server(), transport,
-                                  nullptr, server_args);
-      grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr,
-                                          nullptr);
+      grpc_server_setup_transport(server_->c_server(), transport, nullptr,
+                                  server_args);
+      grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
     }
 
     /* create channel */
@@ -112,18 +111,15 @@ class EndpointPairFixture {
       ApplyCommonChannelArguments(&args);
 
       grpc_channel_args c_args = args.c_channel_args();
-      grpc_transport* transport = grpc_create_chttp2_transport(
-          &exec_ctx, &c_args, endpoints.client, true);
+      grpc_transport* transport =
+          grpc_create_chttp2_transport(&c_args, endpoints.client, true);
       GPR_ASSERT(transport);
       grpc_channel* channel = grpc_channel_create(
-          &exec_ctx, "target", &c_args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
-      grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr,
-                                          nullptr);
+          "target", &c_args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
+      grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 
       channel_ = CreateChannelInternal("", channel);
     }
-
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 
   virtual ~EndpointPairFixture() {
diff --git a/test/cpp/qps/client_async.cc b/test/cpp/qps/client_async.cc
index 07888214e7..7cf9d3ea7e 100644
--- a/test/cpp/qps/client_async.cc
+++ b/test/cpp/qps/client_async.cc
@@ -280,6 +280,7 @@ class AsyncClient : public ClientImpl<StubType, RequestType> {
         },
         &got_tag, &ok, gpr_inf_future(GPR_CLOCK_REALTIME))) {
       t->UpdateHistogram(entry_ptr);
+      entry = HistogramEntry();
       shutdown_mu->lock();
       ctx = ProcessTag(thread_idx, got_tag);
       if (ctx == nullptr) {
diff --git a/test/cpp/server/server_builder_test.cc b/test/cpp/server/server_builder_test.cc
index d18459cec9..694ce549c0 100644
--- a/test/cpp/server/server_builder_test.cc
+++ b/test/cpp/server/server_builder_test.cc
@@ -22,6 +22,8 @@
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 
+#include <grpc/grpc.h>
+
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/core/util/port.h"
 
@@ -77,5 +79,8 @@ TEST(ServerBuilderTest, CreateServerRepeatedPortWithDisallowedReusePort) {
 
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
+  grpc_init();
+  int ret = RUN_ALL_TESTS();
+  grpc_shutdown();
+  return ret;
 }
diff --git a/test/cpp/util/byte_buffer_test.cc b/test/cpp/util/byte_buffer_test.cc
index 8fb51bc663..d603b289c8 100644
--- a/test/cpp/util/byte_buffer_test.cc
+++ b/test/cpp/util/byte_buffer_test.cc
@@ -22,6 +22,7 @@
 #include <vector>
 
 #include <grpc++/support/slice.h>
+#include <grpc/grpc.h>
 #include <grpc/slice.h>
 #include <gtest/gtest.h>
 
@@ -109,5 +110,8 @@ TEST_F(ByteBufferTest, SerializationMakesCopy) {
 
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
+  grpc_init();
+  int ret = RUN_ALL_TESTS();
+  grpc_shutdown();
+  return ret;
 }
diff --git a/test/cpp/util/cli_call.cc b/test/cpp/util/cli_call.cc
index c3220efa54..4f1a20c727 100644
--- a/test/cpp/util/cli_call.cc
+++ b/test/cpp/util/cli_call.cc
@@ -126,7 +126,7 @@ void CliCall::WriteAndWait(const grpc::string& request) {
   call_->Write(send_buffer, tag(2));
   write_done_ = false;
   while (!write_done_) {
-    gpr_cv_wait(&write_cv_, &write_mu_, gpr_inf_future(GPR_CLOCK_REALTIME));
+    gpr_cv_wait(&write_cv_, &write_mu_, gpr_inf_future(GPR_CLOCK_MONOTONIC));
   }
   gpr_mu_unlock(&write_mu_);
 }
@@ -136,7 +136,7 @@ void CliCall::WritesDoneAndWait() {
   call_->WritesDone(tag(4));
   write_done_ = false;
   while (!write_done_) {
-    gpr_cv_wait(&write_cv_, &write_mu_, gpr_inf_future(GPR_CLOCK_REALTIME));
+    gpr_cv_wait(&write_cv_, &write_mu_, gpr_inf_future(GPR_CLOCK_MONOTONIC));
   }
   gpr_mu_unlock(&write_mu_);
 }
diff --git a/test/cpp/util/grpc_tool.cc b/test/cpp/util/grpc_tool.cc
index a6d08cd83c..30c43b206f 100644
--- a/test/cpp/util/grpc_tool.cc
+++ b/test/cpp/util/grpc_tool.cc
@@ -124,13 +124,32 @@ void ParseMetadataFlag(
     return;
   }
   std::vector<grpc::string> fields;
-  const char* delim = ":";
-  size_t cur, next = -1;
-  do {
-    cur = next + 1;
-    next = FLAGS_metadata.find_first_of(delim, cur);
-    fields.push_back(FLAGS_metadata.substr(cur, next - cur));
-  } while (next != grpc::string::npos);
+  const char delim = ':';
+  const char escape = '\\';
+  size_t cur = -1;
+  std::stringstream ss;
+  while (++cur < FLAGS_metadata.length()) {
+    switch (FLAGS_metadata.at(cur)) {
+      case escape:
+        if (cur < FLAGS_metadata.length() - 1) {
+          char c = FLAGS_metadata.at(++cur);
+          if (c == delim || c == escape) {
+            ss << c;
+            continue;
+          }
+        }
+        fprintf(stderr, "Failed to parse metadata flag.\n");
+        exit(1);
+      case delim:
+        fields.push_back(ss.str());
+        ss.str("");
+        ss.clear();
+        break;
+      default:
+        ss << FLAGS_metadata.at(cur);
+    }
+  }
+  fields.push_back(ss.str());
   if (fields.size() % 2) {
     fprintf(stderr, "Failed to parse metadata flag.\n");
     exit(1);
diff --git a/test/cpp/util/grpc_tool_test.cc b/test/cpp/util/grpc_tool_test.cc
index 1c07b2a8ef..0b599f4eeb 100644
--- a/test/cpp/util/grpc_tool_test.cc
+++ b/test/cpp/util/grpc_tool_test.cc
@@ -85,6 +85,8 @@ DECLARE_bool(binary_input);
 DECLARE_bool(binary_output);
 DECLARE_bool(l);
 DECLARE_bool(batch);
+DECLARE_string(metadata);
+DECLARE_string(protofiles);
 
 namespace {
 
@@ -618,6 +620,8 @@ TEST_F(GrpcToolTest, ParseCommand) {
   // Expected output: ECHO_RESPONSE_MESSAGE
   EXPECT_TRUE(0 == strcmp(output_stream.str().c_str(), ECHO_RESPONSE_MESSAGE));
 
+  FLAGS_binary_input = false;
+  FLAGS_binary_output = false;
   ShutdownServer();
 }
 
@@ -652,6 +656,84 @@ TEST_F(GrpcToolTest, TooManyArguments) {
   EXPECT_TRUE(0 == output_stream.tellp());
 }
 
+TEST_F(GrpcToolTest, CallCommandWithMetadata) {
+  // Test input "grpc_cli call localhost:<port> Echo "message: 'Hello'"
+  const grpc::string server_address = SetUpServer();
+  const char* argv[] = {"grpc_cli", "call", server_address.c_str(), "Echo",
+                        "message: 'Hello'"};
+
+  {
+    std::stringstream output_stream;
+    FLAGS_metadata = "key0:val0:key1:valq:key2:val2";
+    EXPECT_TRUE(0 == GrpcToolMainLib(ArraySize(argv), argv,
+                                     TestCliCredentials(),
+                                     std::bind(PrintStream, &output_stream,
+                                               std::placeholders::_1)));
+    // Expected output: "message: \"Hello\""
+    EXPECT_TRUE(nullptr !=
+                strstr(output_stream.str().c_str(), "message: \"Hello\""));
+  }
+
+  {
+    std::stringstream output_stream;
+    FLAGS_metadata = "key:val\\:val";
+    EXPECT_TRUE(0 == GrpcToolMainLib(ArraySize(argv), argv,
+                                     TestCliCredentials(),
+                                     std::bind(PrintStream, &output_stream,
+                                               std::placeholders::_1)));
+    // Expected output: "message: \"Hello\""
+    EXPECT_TRUE(nullptr !=
+                strstr(output_stream.str().c_str(), "message: \"Hello\""));
+  }
+
+  {
+    std::stringstream output_stream;
+    FLAGS_metadata = "key:val\\\\val";
+    EXPECT_TRUE(0 == GrpcToolMainLib(ArraySize(argv), argv,
+                                     TestCliCredentials(),
+                                     std::bind(PrintStream, &output_stream,
+                                               std::placeholders::_1)));
+    // Expected output: "message: \"Hello\""
+    EXPECT_TRUE(nullptr !=
+                strstr(output_stream.str().c_str(), "message: \"Hello\""));
+  }
+
+  FLAGS_metadata = "";
+  ShutdownServer();
+}
+
+TEST_F(GrpcToolTest, CallCommandWithBadMetadata) {
+  // Test input "grpc_cli call localhost:10000 Echo "message: 'Hello'"
+  const char* argv[] = {"grpc_cli", "call", "localhost:10000", "Echo",
+                        "message: 'Hello'"};
+  FLAGS_protofiles = "src/proto/grpc/testing/echo.proto";
+
+  {
+    std::stringstream output_stream;
+    FLAGS_metadata = "key0:val0:key1";
+    // Exit with 1
+    EXPECT_EXIT(
+        GrpcToolMainLib(
+            ArraySize(argv), argv, TestCliCredentials(),
+            std::bind(PrintStream, &output_stream, std::placeholders::_1)),
+        ::testing::ExitedWithCode(1), ".*Failed to parse metadata flag.*");
+  }
+
+  {
+    std::stringstream output_stream;
+    FLAGS_metadata = "key:val\\val";
+    // Exit with 1
+    EXPECT_EXIT(
+        GrpcToolMainLib(
+            ArraySize(argv), argv, TestCliCredentials(),
+            std::bind(PrintStream, &output_stream, std::placeholders::_1)),
+        ::testing::ExitedWithCode(1), ".*Failed to parse metadata flag.*");
+  }
+
+  FLAGS_metadata = "";
+  FLAGS_protofiles = "";
+}
+
 }  // namespace testing
 }  // namespace grpc
 
diff --git a/test/cpp/util/slice_test.cc b/test/cpp/util/slice_test.cc
index 8a8962d7ee..c2e55f3374 100644
--- a/test/cpp/util/slice_test.cc
+++ b/test/cpp/util/slice_test.cc
@@ -18,6 +18,7 @@
 
 #include <grpc++/support/slice.h>
 
+#include <grpc/grpc.h>
 #include <grpc/slice.h>
 #include <gtest/gtest.h>
 
@@ -127,5 +128,8 @@ TEST_F(SliceTest, Cslice) {
 
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
+  grpc_init();
+  int ret = RUN_ALL_TESTS();
+  grpc_shutdown();
+  return ret;
 }
diff --git a/tools/buildgen/build-cleaner.py b/tools/buildgen/build-cleaner.py
index 7b42844f75..a6b86fb242 100755
--- a/tools/buildgen/build-cleaner.py
+++ b/tools/buildgen/build-cleaner.py
@@ -22,65 +22,65 @@ import yaml
 
 TEST = (os.environ.get('TEST', 'false') == 'true')
 
-_TOP_LEVEL_KEYS = ['settings', 'proto_deps', 'filegroups', 'libs', 'targets', 'vspackages']
+_TOP_LEVEL_KEYS = [
+    'settings', 'proto_deps', 'filegroups', 'libs', 'targets', 'vspackages'
+]
 _ELEM_KEYS = [
-    'name',
-    'gtest',
-    'cpu_cost',
-    'flaky',
-    'build',
-    'run',
-    'language',
-    'public_headers',
-    'headers',
-    'src',
-    'deps']
+    'name', 'gtest', 'cpu_cost', 'flaky', 'build', 'run', 'language',
+    'public_headers', 'headers', 'src', 'deps'
+]
+
 
 def repr_ordered_dict(dumper, odict):
-  return dumper.represent_mapping(u'tag:yaml.org,2002:map', odict.items())
+    return dumper.represent_mapping(u'tag:yaml.org,2002:map', odict.items())
+
 
 yaml.add_representer(collections.OrderedDict, repr_ordered_dict)
 
+
 def rebuild_as_ordered_dict(indict, special_keys):
-  outdict = collections.OrderedDict()
-  for key in sorted(indict.keys()):
-    if '#' in key:
-      outdict[key] = indict[key]
-  for key in special_keys:
-    if key in indict:
-      outdict[key] = indict[key]
-  for key in sorted(indict.keys()):
-    if key in special_keys: continue
-    if '#' in key: continue
-    outdict[key] = indict[key]
-  return outdict
+    outdict = collections.OrderedDict()
+    for key in sorted(indict.keys()):
+        if '#' in key:
+            outdict[key] = indict[key]
+    for key in special_keys:
+        if key in indict:
+            outdict[key] = indict[key]
+    for key in sorted(indict.keys()):
+        if key in special_keys: continue
+        if '#' in key: continue
+        outdict[key] = indict[key]
+    return outdict
+
 
 def clean_elem(indict):
-  for name in ['public_headers', 'headers', 'src']:
-    if name not in indict: continue
-    inlist = indict[name]
-    protos = list(x for x in inlist if os.path.splitext(x)[1] == '.proto')
-    others = set(x for x in inlist if x not in protos)
-    indict[name] = protos + sorted(others)
-  return rebuild_as_ordered_dict(indict, _ELEM_KEYS)
+    for name in ['public_headers', 'headers', 'src']:
+        if name not in indict: continue
+        inlist = indict[name]
+        protos = list(x for x in inlist if os.path.splitext(x)[1] == '.proto')
+        others = set(x for x in inlist if x not in protos)
+        indict[name] = protos + sorted(others)
+    return rebuild_as_ordered_dict(indict, _ELEM_KEYS)
+
 
 for filename in sys.argv[1:]:
-  with open(filename) as f:
-    js = yaml.load(f)
-  js = rebuild_as_ordered_dict(js, _TOP_LEVEL_KEYS)
-  for grp in ['filegroups', 'libs', 'targets']:
-    if grp not in js: continue
-    js[grp] = sorted([clean_elem(x) for x in js[grp]],
-                     key=lambda x: (x.get('language', '_'), x['name']))
-  output = yaml.dump(js, indent=2, width=80, default_flow_style=False)
-  # massage out trailing whitespace
-  lines = []
-  for line in output.splitlines():
-    lines.append(line.rstrip() + '\n')
-  output = ''.join(lines)
-  if TEST:
     with open(filename) as f:
-      assert f.read() == output
-  else:
-    with open(filename, 'w') as f:
-      f.write(output)
+        js = yaml.load(f)
+    js = rebuild_as_ordered_dict(js, _TOP_LEVEL_KEYS)
+    for grp in ['filegroups', 'libs', 'targets']:
+        if grp not in js: continue
+        js[grp] = sorted(
+            [clean_elem(x) for x in js[grp]],
+            key=lambda x: (x.get('language', '_'), x['name']))
+    output = yaml.dump(js, indent=2, width=80, default_flow_style=False)
+    # massage out trailing whitespace
+    lines = []
+    for line in output.splitlines():
+        lines.append(line.rstrip() + '\n')
+    output = ''.join(lines)
+    if TEST:
+        with open(filename) as f:
+            assert f.read() == output
+    else:
+        with open(filename, 'w') as f:
+            f.write(output)
diff --git a/tools/buildgen/bunch.py b/tools/buildgen/bunch.py
index 813051ad60..0ce9a6b233 100755
--- a/tools/buildgen/bunch.py
+++ b/tools/buildgen/bunch.py
@@ -11,43 +11,42 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Allows dot-accessible dictionaries."""
 
 
 class Bunch(dict):
 
-  def __init__(self, d):
-    dict.__init__(self, d)
-    self.__dict__.update(d)
+    def __init__(self, d):
+        dict.__init__(self, d)
+        self.__dict__.update(d)
 
 
 # Converts any kind of variable to a Bunch
 def to_bunch(var):
-  if isinstance(var, list):
-    return [to_bunch(i) for i in var]
-  if isinstance(var, dict):
-    ret = {}
-    for k, v in var.items():
-      if isinstance(v, (list, dict)):
-        v = to_bunch(v)
-      ret[k] = v
-    return Bunch(ret)
-  else:
-    return var
+    if isinstance(var, list):
+        return [to_bunch(i) for i in var]
+    if isinstance(var, dict):
+        ret = {}
+        for k, v in var.items():
+            if isinstance(v, (list, dict)):
+                v = to_bunch(v)
+            ret[k] = v
+        return Bunch(ret)
+    else:
+        return var
 
 
 # Merges JSON 'add' into JSON 'dst'
 def merge_json(dst, add):
-  if isinstance(dst, dict) and isinstance(add, dict):
-    for k, v in add.items():
-      if k in dst:
-        if k == '#': continue
-        merge_json(dst[k], v)
-      else:
-        dst[k] = v
-  elif isinstance(dst, list) and isinstance(add, list):
-    dst.extend(add)
-  else:
-    raise Exception('Tried to merge incompatible objects %s %s\n\n%r\n\n%r' % (type(dst).__name__, type(add).__name__, dst, add))
-
+    if isinstance(dst, dict) and isinstance(add, dict):
+        for k, v in add.items():
+            if k in dst:
+                if k == '#': continue
+                merge_json(dst[k], v)
+            else:
+                dst[k] = v
+    elif isinstance(dst, list) and isinstance(add, list):
+        dst.extend(add)
+    else:
+        raise Exception('Tried to merge incompatible objects %s %s\n\n%r\n\n%r'
+                        % (type(dst).__name__, type(add).__name__, dst, add))
diff --git a/tools/buildgen/generate_projects.py b/tools/buildgen/generate_projects.py
index d29cd02152..bb5de9c42b 100755
--- a/tools/buildgen/generate_projects.py
+++ b/tools/buildgen/generate_projects.py
@@ -21,7 +21,9 @@ import shutil
 import sys
 import tempfile
 import multiprocessing
-sys.path.append(os.path.join(os.path.dirname(sys.argv[0]), '..', 'run_tests', 'python_utils'))
+sys.path.append(
+    os.path.join(
+        os.path.dirname(sys.argv[0]), '..', 'run_tests', 'python_utils'))
 
 assert sys.argv[1:], 'run generate_projects.sh instead of this directly'
 
@@ -45,57 +47,58 @@ plugins = sorted(glob.glob('tools/buildgen/plugins/*.py'))
 
 templates = args.templates
 if not templates:
-  for root, dirs, files in os.walk('templates'):
-    for f in files:
-      templates.append(os.path.join(root, f))
+    for root, dirs, files in os.walk('templates'):
+        for f in files:
+            templates.append(os.path.join(root, f))
 
 pre_jobs = []
 base_cmd = ['python2.7', 'tools/buildgen/mako_renderer.py']
 cmd = base_cmd[:]
 for plugin in plugins:
-  cmd.append('-p')
-  cmd.append(plugin)
+    cmd.append('-p')
+    cmd.append(plugin)
 for js in json:
-  cmd.append('-d')
-  cmd.append(js)
+    cmd.append('-d')
+    cmd.append(js)
 cmd.append('-w')
 preprocessed_build = '.preprocessed_build'
 cmd.append(preprocessed_build)
 if args.output_merged is not None:
-  cmd.append('-M')
-  cmd.append(args.output_merged)
-pre_jobs.append(jobset.JobSpec(cmd, shortname='preprocess', timeout_seconds=None))
+    cmd.append('-M')
+    cmd.append(args.output_merged)
+pre_jobs.append(
+    jobset.JobSpec(cmd, shortname='preprocess', timeout_seconds=None))
 
 jobs = []
 for template in reversed(sorted(templates)):
-  root, f = os.path.split(template)
-  if os.path.splitext(f)[1] == '.template':
-    out_dir = args.base + root[len('templates'):]
-    out = out_dir + '/' + os.path.splitext(f)[0]
-    if not os.path.exists(out_dir):
-      os.makedirs(out_dir)
-    cmd = base_cmd[:]
-    cmd.append('-P')
-    cmd.append(preprocessed_build)
-    cmd.append('-o')
-    if test is None:
-      cmd.append(out)
-    else:
-      tf = tempfile.mkstemp()
-      test[out] = tf[1]
-      os.close(tf[0])
-      cmd.append(test[out])
-    cmd.append(args.base + '/' + root + '/' + f)
-    jobs.append(jobset.JobSpec(cmd, shortname=out, timeout_seconds=None))
+    root, f = os.path.split(template)
+    if os.path.splitext(f)[1] == '.template':
+        out_dir = args.base + root[len('templates'):]
+        out = out_dir + '/' + os.path.splitext(f)[0]
+        if not os.path.exists(out_dir):
+            os.makedirs(out_dir)
+        cmd = base_cmd[:]
+        cmd.append('-P')
+        cmd.append(preprocessed_build)
+        cmd.append('-o')
+        if test is None:
+            cmd.append(out)
+        else:
+            tf = tempfile.mkstemp()
+            test[out] = tf[1]
+            os.close(tf[0])
+            cmd.append(test[out])
+        cmd.append(args.base + '/' + root + '/' + f)
+        jobs.append(jobset.JobSpec(cmd, shortname=out, timeout_seconds=None))
 
 jobset.run(pre_jobs, maxjobs=args.jobs)
 jobset.run(jobs, maxjobs=args.jobs)
 
 if test is not None:
-  for s, g in test.iteritems():
-    if os.path.isfile(g):
-      assert 0 == os.system('diff %s %s' % (s, g)), s
-      os.unlink(g)
-    else:
-      assert 0 == os.system('diff -r %s %s' % (s, g)), s
-      shutil.rmtree(g, ignore_errors=True)
+    for s, g in test.iteritems():
+        if os.path.isfile(g):
+            assert 0 == os.system('diff %s %s' % (s, g)), s
+            os.unlink(g)
+        else:
+            assert 0 == os.system('diff -r %s %s' % (s, g)), s
+            shutil.rmtree(g, ignore_errors=True)
diff --git a/tools/buildgen/mako_renderer.py b/tools/buildgen/mako_renderer.py
index 7738053003..0569fa14d2 100755
--- a/tools/buildgen/mako_renderer.py
+++ b/tools/buildgen/mako_renderer.py
@@ -12,8 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
-
 """Simple Mako renderer.
 
 Just a wrapper around the mako rendering library.
@@ -27,7 +25,6 @@ import cPickle as pickle
 import shutil
 import sys
 
-
 from mako.lookup import TemplateLookup
 from mako.runtime import Context
 from mako.template import Template
@@ -37,151 +34,158 @@ import yaml
 
 # Imports a plugin
 def import_plugin(name):
-  _, base_ex = os.path.split(name)
-  base, _ = os.path.splitext(base_ex)
+    _, base_ex = os.path.split(name)
+    base, _ = os.path.splitext(base_ex)
 
-  with open(name, 'r') as plugin_file:
-    plugin_code = plugin_file.read()
-  plugin_module = imp.new_module(base)
-  exec plugin_code in plugin_module.__dict__
-  return plugin_module
+    with open(name, 'r') as plugin_file:
+        plugin_code = plugin_file.read()
+    plugin_module = imp.new_module(base)
+    exec plugin_code in plugin_module.__dict__
+    return plugin_module
 
 
 def out(msg):
-  print >> sys.stderr, msg
+    print >> sys.stderr, msg
 
 
 def showhelp():
-  out('mako-renderer.py [-o out] [-m cache] [-P preprocessed_input] [-d dict] [-d dict...]'
-      ' [-t template] [-w preprocessed_output]')
+    out('mako-renderer.py [-o out] [-m cache] [-P preprocessed_input] [-d dict] [-d dict...]'
+        ' [-t template] [-w preprocessed_output]')
 
 
 def main(argv):
-  got_input = False
-  module_directory = None
-  preprocessed_output = None
-  dictionary = {}
-  json_dict = {}
-  got_output = False
-  plugins = []
-  output_name = None
-  got_preprocessed_input = False
-  output_merged = None
-
-  try:
-    opts, args = getopt.getopt(argv, 'hM:m:d:o:p:t:P:w:')
-  except getopt.GetoptError:
-    out('Unknown option')
-    showhelp()
-    sys.exit(2)
-
-  for opt, arg in opts:
-    if opt == '-h':
-      out('Displaying showhelp')
-      showhelp()
-      sys.exit()
-    elif opt == '-o':
-      if got_output:
-        out('Got more than one output')
+    got_input = False
+    module_directory = None
+    preprocessed_output = None
+    dictionary = {}
+    json_dict = {}
+    got_output = False
+    plugins = []
+    output_name = None
+    got_preprocessed_input = False
+    output_merged = None
+
+    try:
+        opts, args = getopt.getopt(argv, 'hM:m:d:o:p:t:P:w:')
+    except getopt.GetoptError:
+        out('Unknown option')
         showhelp()
-        sys.exit(3)
-      got_output = True
-      output_name = arg
-    elif opt == '-m':
-      if module_directory is not None:
-        out('Got more than one cache directory')
+        sys.exit(2)
+
+    for opt, arg in opts:
+        if opt == '-h':
+            out('Displaying showhelp')
+            showhelp()
+            sys.exit()
+        elif opt == '-o':
+            if got_output:
+                out('Got more than one output')
+                showhelp()
+                sys.exit(3)
+            got_output = True
+            output_name = arg
+        elif opt == '-m':
+            if module_directory is not None:
+                out('Got more than one cache directory')
+                showhelp()
+                sys.exit(4)
+            module_directory = arg
+        elif opt == '-M':
+            if output_merged is not None:
+                out('Got more than one output merged path')
+                showhelp()
+                sys.exit(5)
+            output_merged = arg
+        elif opt == '-P':
+            assert not got_preprocessed_input
+            assert json_dict == {}
+            sys.path.insert(
+                0,
+                os.path.abspath(
+                    os.path.join(os.path.dirname(sys.argv[0]), 'plugins')))
+            with open(arg, 'r') as dict_file:
+                dictionary = pickle.load(dict_file)
+            got_preprocessed_input = True
+        elif opt == '-d':
+            assert not got_preprocessed_input
+            with open(arg, 'r') as dict_file:
+                bunch.merge_json(json_dict, yaml.load(dict_file.read()))
+        elif opt == '-p':
+            plugins.append(import_plugin(arg))
+        elif opt == '-w':
+            preprocessed_output = arg
+
+    if not got_preprocessed_input:
+        for plugin in plugins:
+            plugin.mako_plugin(json_dict)
+        if output_merged:
+            with open(output_merged, 'w') as yaml_file:
+                yaml_file.write(yaml.dump(json_dict))
+        for k, v in json_dict.items():
+            dictionary[k] = bunch.to_bunch(v)
+
+    if preprocessed_output:
+        with open(preprocessed_output, 'w') as dict_file:
+            pickle.dump(dictionary, dict_file)
+
+    cleared_dir = False
+    for arg in args:
+        got_input = True
+        with open(arg) as f:
+            srcs = list(yaml.load_all(f.read()))
+        for src in srcs:
+            if isinstance(src, basestring):
+                assert len(srcs) == 1
+                template = Template(
+                    src,
+                    filename=arg,
+                    module_directory=module_directory,
+                    lookup=TemplateLookup(directories=['.']))
+                with open(output_name, 'w') as output_file:
+                    template.render_context(Context(output_file, **dictionary))
+            else:
+                # we have optional control data: this template represents
+                # a directory
+                if not cleared_dir:
+                    if not os.path.exists(output_name):
+                        pass
+                    elif os.path.isfile(output_name):
+                        os.unlink(output_name)
+                    else:
+                        shutil.rmtree(output_name, ignore_errors=True)
+                    cleared_dir = True
+                items = []
+                if 'foreach' in src:
+                    for el in dictionary[src['foreach']]:
+                        if 'cond' in src:
+                            args = dict(dictionary)
+                            args['selected'] = el
+                            if not eval(src['cond'], {}, args):
+                                continue
+                        items.append(el)
+                    assert items
+                else:
+                    items = [None]
+                for item in items:
+                    args = dict(dictionary)
+                    args['selected'] = item
+                    item_output_name = os.path.join(
+                        output_name,
+                        Template(src['output_name']).render(**args))
+                    if not os.path.exists(os.path.dirname(item_output_name)):
+                        os.makedirs(os.path.dirname(item_output_name))
+                    template = Template(
+                        src['template'],
+                        filename=arg,
+                        module_directory=module_directory,
+                        lookup=TemplateLookup(directories=['.']))
+                    with open(item_output_name, 'w') as output_file:
+                        template.render_context(Context(output_file, **args))
+
+    if not got_input and not preprocessed_output:
+        out('Got nothing to do')
         showhelp()
-        sys.exit(4)
-      module_directory = arg
-    elif opt == '-M':
-      if output_merged is not None:
-        out('Got more than one output merged path')
-        showhelp()
-        sys.exit(5)
-      output_merged = arg
-    elif opt == '-P':
-      assert not got_preprocessed_input
-      assert json_dict == {}
-      sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), 'plugins')))
-      with open(arg, 'r') as dict_file:
-        dictionary = pickle.load(dict_file)
-      got_preprocessed_input = True
-    elif opt == '-d':
-      assert not got_preprocessed_input
-      with open(arg, 'r') as dict_file:
-        bunch.merge_json(json_dict, yaml.load(dict_file.read()))
-    elif opt == '-p':
-      plugins.append(import_plugin(arg))
-    elif opt == '-w':
-      preprocessed_output = arg
-
-  if not got_preprocessed_input:
-    for plugin in plugins:
-      plugin.mako_plugin(json_dict)
-    if output_merged:
-      with open(output_merged, 'w') as yaml_file:
-        yaml_file.write(yaml.dump(json_dict))
-    for k, v in json_dict.items():
-      dictionary[k] = bunch.to_bunch(v)
-
-  if preprocessed_output:
-    with open(preprocessed_output, 'w') as dict_file:
-      pickle.dump(dictionary, dict_file)
-
-  cleared_dir = False
-  for arg in args:
-    got_input = True
-    with open(arg) as f:
-      srcs = list(yaml.load_all(f.read()))
-    for src in srcs:
-      if isinstance(src, basestring):
-        assert len(srcs) == 1
-        template = Template(src,
-                            filename=arg,
-                            module_directory=module_directory,
-                            lookup=TemplateLookup(directories=['.']))
-        with open(output_name, 'w') as output_file:
-          template.render_context(Context(output_file, **dictionary))
-      else:
-        # we have optional control data: this template represents
-        # a directory
-        if not cleared_dir:
-          if not os.path.exists(output_name):
-            pass
-          elif os.path.isfile(output_name):
-            os.unlink(output_name)
-          else:
-            shutil.rmtree(output_name, ignore_errors=True)
-          cleared_dir = True
-        items = []
-        if 'foreach' in src:
-          for el in dictionary[src['foreach']]:
-            if 'cond' in src:
-              args = dict(dictionary)
-              args['selected'] = el
-              if not eval(src['cond'], {}, args):
-                continue
-            items.append(el)
-          assert items
-        else:
-          items = [None]
-        for item in items:
-          args = dict(dictionary)
-          args['selected'] = item
-          item_output_name = os.path.join(
-              output_name, Template(src['output_name']).render(**args))
-          if not os.path.exists(os.path.dirname(item_output_name)):
-            os.makedirs(os.path.dirname(item_output_name))
-          template = Template(src['template'],
-                              filename=arg,
-                              module_directory=module_directory,
-                              lookup=TemplateLookup(directories=['.']))
-          with open(item_output_name, 'w') as output_file:
-            template.render_context(Context(output_file, **args))
-
-  if not got_input and not preprocessed_output:
-    out('Got nothing to do')
-    showhelp()
+
 
 if __name__ == '__main__':
-  main(sys.argv[1:])
+    main(sys.argv[1:])
diff --git a/tools/buildgen/plugins/expand_bin_attrs.py b/tools/buildgen/plugins/expand_bin_attrs.py
index 6ad6e9cb3d..d5acd8d06c 100755
--- a/tools/buildgen/plugins/expand_bin_attrs.py
+++ b/tools/buildgen/plugins/expand_bin_attrs.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Buildgen expand binary attributes plugin.
 
 This fills in any optional attributes.
@@ -20,7 +19,7 @@ This fills in any optional attributes.
 
 
 def mako_plugin(dictionary):
-  """The exported plugin code for expand_filegroups.
+    """The exported plugin code for expand_filegroups.
 
   The list of libs in the build.yaml file can contain "filegroups" tags.
   These refer to the filegroups in the root object. We will expand and
@@ -28,20 +27,20 @@ def mako_plugin(dictionary):
 
   """
 
-  targets = dictionary.get('targets')
-  default_platforms = ['windows', 'posix', 'linux', 'mac']
-
-  for tgt in targets:
-    tgt['flaky'] = tgt.get('flaky', False)
-    tgt['platforms'] = sorted(tgt.get('platforms', default_platforms))
-    tgt['ci_platforms'] = sorted(tgt.get('ci_platforms', tgt['platforms']))
-    tgt['boringssl'] = tgt.get('boringssl', False)
-    tgt['zlib'] = tgt.get('zlib', False)
-    tgt['ares'] = tgt.get('ares', False)
-    tgt['gtest'] = tgt.get('gtest', False)
-
-  libs = dictionary.get('libs')
-  for lib in libs:
-    lib['boringssl'] = lib.get('boringssl', False)
-    lib['zlib'] = lib.get('zlib', False)
-    lib['ares'] = lib.get('ares', False)
+    targets = dictionary.get('targets')
+    default_platforms = ['windows', 'posix', 'linux', 'mac']
+
+    for tgt in targets:
+        tgt['flaky'] = tgt.get('flaky', False)
+        tgt['platforms'] = sorted(tgt.get('platforms', default_platforms))
+        tgt['ci_platforms'] = sorted(tgt.get('ci_platforms', tgt['platforms']))
+        tgt['boringssl'] = tgt.get('boringssl', False)
+        tgt['zlib'] = tgt.get('zlib', False)
+        tgt['ares'] = tgt.get('ares', False)
+        tgt['gtest'] = tgt.get('gtest', False)
+
+    libs = dictionary.get('libs')
+    for lib in libs:
+        lib['boringssl'] = lib.get('boringssl', False)
+        lib['zlib'] = lib.get('zlib', False)
+        lib['ares'] = lib.get('ares', False)
diff --git a/tools/buildgen/plugins/expand_filegroups.py b/tools/buildgen/plugins/expand_filegroups.py
index 669704063e..886a59cdbb 100755
--- a/tools/buildgen/plugins/expand_filegroups.py
+++ b/tools/buildgen/plugins/expand_filegroups.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Buildgen expand filegroups plugin.
 
 This takes the list of libs from our yaml dictionary,
@@ -21,132 +20,135 @@ and expands any and all filegroup.
 
 
 def excluded(filename, exclude_res):
-  for r in exclude_res:
-    if r.search(filename):
-      return True
-  return False
+    for r in exclude_res:
+        if r.search(filename):
+            return True
+    return False
 
 
 def uniquify(lst):
-  out = []
-  for el in lst:
-    if el not in out:
-      out.append(el)
-  return out
+    out = []
+    for el in lst:
+        if el not in out:
+            out.append(el)
+    return out
 
 
 FILEGROUP_LISTS = ['src', 'headers', 'public_headers', 'deps']
 
-
 FILEGROUP_DEFAULTS = {
-  'language': 'c',
-  'boringssl': False,
-  'zlib': False,
-  'ares': False,
+    'language': 'c',
+    'boringssl': False,
+    'zlib': False,
+    'ares': False,
 }
 
 
 def mako_plugin(dictionary):
-  """The exported plugin code for expand_filegroups.
+    """The exported plugin code for expand_filegroups.
 
   The list of libs in the build.yaml file can contain "filegroups" tags.
   These refer to the filegroups in the root object. We will expand and
   merge filegroups on the src, headers and public_headers properties.
 
   """
-  libs = dictionary.get('libs')
-  targets = dictionary.get('targets')
-  filegroups_list = dictionary.get('filegroups')
-  filegroups = {}
-
-  for fg in filegroups_list:
-    for lst in FILEGROUP_LISTS:
-      fg[lst] = fg.get(lst, [])
-      fg['own_%s' % lst] = list(fg[lst])
-    for attr, val in FILEGROUP_DEFAULTS.iteritems():
-      if attr not in fg:
-        fg[attr] = val
-
-  todo = list(filegroups_list)
-  skips = 0
-
-  while todo:
-    assert skips != len(todo), "infinite loop in filegroup uses clauses: %r" % [t['name'] for t in todo]
-    # take the first element of the todo list
-    cur = todo[0]
-    todo = todo[1:]
-    # check all uses filegroups are present (if no, skip and come back later)
-    skip = False
-    for uses in cur.get('uses', []):
-      if uses not in filegroups:
-        skip = True
-    if skip:
-      skips += 1
-      todo.append(cur)
-    else:
-      skips = 0
-      assert 'plugins' not in cur
-      plugins = []
-      for uses in cur.get('uses', []):
-        for plugin in filegroups[uses]['plugins']:
-          if plugin not in plugins:
-            plugins.append(plugin)
+    libs = dictionary.get('libs')
+    targets = dictionary.get('targets')
+    filegroups_list = dictionary.get('filegroups')
+    filegroups = {}
+
+    for fg in filegroups_list:
         for lst in FILEGROUP_LISTS:
-          vals = cur.get(lst, [])
-          vals.extend(filegroups[uses].get(lst, []))
-          cur[lst] = vals
-      cur_plugin_name = cur.get('plugin')
-      if cur_plugin_name:
-        plugins.append(cur_plugin_name)
-      cur['plugins'] = plugins
-      filegroups[cur['name']] = cur
-
-  # build reverse dependency map
-  things = {}
-  for thing in dictionary['libs'] + dictionary['targets'] + dictionary['filegroups']:
-    things[thing['name']] = thing
-    thing['used_by'] = []
-  thing_deps = lambda t: t.get('uses', []) + t.get('filegroups', []) + t.get('deps', [])
-  for thing in things.itervalues():
-    done = set()
-    todo = thing_deps(thing)
+            fg[lst] = fg.get(lst, [])
+            fg['own_%s' % lst] = list(fg[lst])
+        for attr, val in FILEGROUP_DEFAULTS.iteritems():
+            if attr not in fg:
+                fg[attr] = val
+
+    todo = list(filegroups_list)
+    skips = 0
+
     while todo:
-      cur = todo[0]
-      todo = todo[1:]
-      if cur in done: continue
-      things[cur]['used_by'].append(thing['name'])
-      todo.extend(thing_deps(things[cur]))
-      done.add(cur)
-
-  # the above expansion can introduce duplicate filenames: contract them here
-  for fg in filegroups.itervalues():
-    for lst in FILEGROUP_LISTS:
-      fg[lst] = uniquify(fg.get(lst, []))
-
-  for tgt in dictionary['targets']:
-    for lst in FILEGROUP_LISTS:
-      tgt[lst] = tgt.get(lst, [])
-      tgt['own_%s' % lst] = list(tgt[lst])
-
-  for lib in libs + targets:
-    assert 'plugins' not in lib
-    plugins = []
-    for lst in FILEGROUP_LISTS:
-      vals = lib.get(lst, [])
-      lib[lst] = list(vals)
-      lib['own_%s' % lst] = list(vals)
-    for fg_name in lib.get('filegroups', []):
-      fg = filegroups[fg_name]
-      for plugin in fg['plugins']:
-        if plugin not in plugins:
-          plugins.append(plugin)
-      for lst in FILEGROUP_LISTS:
-        vals = lib.get(lst, [])
-        vals.extend(fg.get(lst, []))
-        lib[lst] = vals
-      lib['plugins'] = plugins
-    if lib.get('generate_plugin_registry', False):
-      lib['src'].append('src/core/plugin_registry/%s_plugin_registry.cc' %
-                        lib['name'])
-    for lst in FILEGROUP_LISTS:
-      lib[lst] = uniquify(lib.get(lst, []))
+        assert skips != len(
+            todo), "infinite loop in filegroup uses clauses: %r" % [
+                t['name'] for t in todo
+            ]
+        # take the first element of the todo list
+        cur = todo[0]
+        todo = todo[1:]
+        # check all uses filegroups are present (if no, skip and come back later)
+        skip = False
+        for uses in cur.get('uses', []):
+            if uses not in filegroups:
+                skip = True
+        if skip:
+            skips += 1
+            todo.append(cur)
+        else:
+            skips = 0
+            assert 'plugins' not in cur
+            plugins = []
+            for uses in cur.get('uses', []):
+                for plugin in filegroups[uses]['plugins']:
+                    if plugin not in plugins:
+                        plugins.append(plugin)
+                for lst in FILEGROUP_LISTS:
+                    vals = cur.get(lst, [])
+                    vals.extend(filegroups[uses].get(lst, []))
+                    cur[lst] = vals
+            cur_plugin_name = cur.get('plugin')
+            if cur_plugin_name:
+                plugins.append(cur_plugin_name)
+            cur['plugins'] = plugins
+            filegroups[cur['name']] = cur
+
+    # build reverse dependency map
+    things = {}
+    for thing in dictionary['libs'] + dictionary['targets'] + dictionary[
+            'filegroups']:
+        things[thing['name']] = thing
+        thing['used_by'] = []
+    thing_deps = lambda t: t.get('uses', []) + t.get('filegroups', []) + t.get('deps', [])
+    for thing in things.itervalues():
+        done = set()
+        todo = thing_deps(thing)
+        while todo:
+            cur = todo[0]
+            todo = todo[1:]
+            if cur in done: continue
+            things[cur]['used_by'].append(thing['name'])
+            todo.extend(thing_deps(things[cur]))
+            done.add(cur)
+
+    # the above expansion can introduce duplicate filenames: contract them here
+    for fg in filegroups.itervalues():
+        for lst in FILEGROUP_LISTS:
+            fg[lst] = uniquify(fg.get(lst, []))
+
+    for tgt in dictionary['targets']:
+        for lst in FILEGROUP_LISTS:
+            tgt[lst] = tgt.get(lst, [])
+            tgt['own_%s' % lst] = list(tgt[lst])
+
+    for lib in libs + targets:
+        assert 'plugins' not in lib
+        plugins = []
+        for lst in FILEGROUP_LISTS:
+            vals = lib.get(lst, [])
+            lib[lst] = list(vals)
+            lib['own_%s' % lst] = list(vals)
+        for fg_name in lib.get('filegroups', []):
+            fg = filegroups[fg_name]
+            for plugin in fg['plugins']:
+                if plugin not in plugins:
+                    plugins.append(plugin)
+            for lst in FILEGROUP_LISTS:
+                vals = lib.get(lst, [])
+                vals.extend(fg.get(lst, []))
+                lib[lst] = vals
+            lib['plugins'] = plugins
+        if lib.get('generate_plugin_registry', False):
+            lib['src'].append('src/core/plugin_registry/%s_plugin_registry.cc' %
+                              lib['name'])
+        for lst in FILEGROUP_LISTS:
+            lib[lst] = uniquify(lib.get(lst, []))
diff --git a/tools/buildgen/plugins/expand_version.py b/tools/buildgen/plugins/expand_version.py
index d8a3600b7c..8f56ce8fc9 100755
--- a/tools/buildgen/plugins/expand_version.py
+++ b/tools/buildgen/plugins/expand_version.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Buildgen package version plugin
 
 This parses the list of targets from the yaml build file, and creates
@@ -19,84 +18,90 @@ a custom version string for each language's package.
 
 """
 
-
 import re
 
 LANGUAGES = [
-  'core',
-  'cpp',
-  'csharp',
-  'objc',
-  'php',
-  'python',
-  'ruby',
-  ]
+    'core',
+    'cpp',
+    'csharp',
+    'objc',
+    'php',
+    'python',
+    'ruby',
+]
+
 
 class Version:
 
-  def __init__(self, s):
-    self.tag = None
-    if '-' in s:
-      s, self.tag = s.split('-')
-    self.major, self.minor, self.patch = [int(x) for x in s.split('.')]
+    def __init__(self, s):
+        self.tag = None
+        if '-' in s:
+            s, self.tag = s.split('-')
+        self.major, self.minor, self.patch = [int(x) for x in s.split('.')]
+
+    def __str__(self):
+        """Version string in a somewhat idiomatic style for most languages"""
+        s = '%d.%d.%d' % (self.major, self.minor, self.patch)
+        if self.tag:
+            s += '-%s' % self.tag
+        return s
 
-  def __str__(self):
-    """Version string in a somewhat idiomatic style for most languages"""
-    s = '%d.%d.%d' % (self.major, self.minor, self.patch)
-    if self.tag:
-      s += '-%s' % self.tag
-    return s
+    def pep440(self):
+        """Version string in Python PEP440 style"""
+        s = '%d.%d.%d' % (self.major, self.minor, self.patch)
+        if self.tag:
+            # we need to translate from grpc version tags to pep440 version
+            # tags; this code is likely to be a little ad-hoc
+            if self.tag == 'dev':
+                s += '.dev0'
+            elif len(self.tag) >= 3 and self.tag[0:3] == 'pre':
+                s += 'rc%d' % int(self.tag[3:])
+            else:
+                raise Exception(
+                    'Don\'t know how to translate version tag "%s" to pep440' %
+                    self.tag)
+        return s
 
-  def pep440(self):
-    """Version string in Python PEP440 style"""
-    s = '%d.%d.%d' % (self.major, self.minor, self.patch)
-    if self.tag:
-      # we need to translate from grpc version tags to pep440 version
-      # tags; this code is likely to be a little ad-hoc
-      if self.tag == 'dev':
-        s += '.dev0'
-      elif len(self.tag) >= 3 and self.tag[0:3] == 'pre':
-        s += 'rc%d' % int(self.tag[3:])
-      else:
-        raise Exception('Don\'t know how to translate version tag "%s" to pep440' % self.tag)
-    return s
+    def ruby(self):
+        """Version string in Ruby style"""
+        if self.tag:
+            return '%d.%d.%d.%s' % (self.major, self.minor, self.patch,
+                                    self.tag)
+        else:
+            return '%d.%d.%d' % (self.major, self.minor, self.patch)
 
-  def ruby(self):
-    """Version string in Ruby style"""
-    if self.tag:
-      return '%d.%d.%d.%s' % (self.major, self.minor, self.patch, self.tag)
-    else:
-      return '%d.%d.%d' % (self.major, self.minor, self.patch)
+    def php(self):
+        """Version string for PHP PECL package"""
+        s = '%d.%d.%d' % (self.major, self.minor, self.patch)
+        if self.tag:
+            if self.tag == 'dev':
+                s += 'dev'
+            elif len(self.tag) >= 3 and self.tag[0:3] == 'pre':
+                s += 'RC%d' % int(self.tag[3:])
+            else:
+                raise Exception(
+                    'Don\'t know how to translate version tag "%s" to PECL version'
+                    % self.tag)
+        return s
 
-  def php(self):
-    """Version string for PHP PECL package"""
-    s = '%d.%d.%d' % (self.major, self.minor, self.patch)
-    if self.tag:
-      if self.tag == 'dev':
-        s += 'dev'
-      elif len(self.tag) >= 3 and self.tag[0:3] == 'pre':
-        s += 'RC%d' % int(self.tag[3:])
-      else:
-        raise Exception('Don\'t know how to translate version tag "%s" to PECL version' % self.tag)
-    return s
+    def php_composer(self):
+        """Version string for PHP Composer package"""
+        return '%d.%d.%d' % (self.major, self.minor, self.patch)
 
-  def php_composer(self):
-    """Version string for PHP Composer package"""
-    return '%d.%d.%d' % (self.major, self.minor, self.patch)
 
 def mako_plugin(dictionary):
-  """Expand version numbers:
+    """Expand version numbers:
      - for each language, ensure there's a language_version tag in
        settings (defaulting to the master version tag)
      - expand version strings to major, minor, patch, and tag
   """
 
-  settings = dictionary['settings']
-  master_version = Version(settings['version'])
-  settings['version'] = master_version
-  for language in LANGUAGES:
-    version_tag = '%s_version' % language
-    if version_tag in settings:
-      settings[version_tag] = Version(settings[version_tag])
-    else:
-      settings[version_tag] = master_version
+    settings = dictionary['settings']
+    master_version = Version(settings['version'])
+    settings['version'] = master_version
+    for language in LANGUAGES:
+        version_tag = '%s_version' % language
+        if version_tag in settings:
+            settings[version_tag] = Version(settings[version_tag])
+        else:
+            settings[version_tag] = master_version
diff --git a/tools/buildgen/plugins/generate_vsprojects.py b/tools/buildgen/plugins/generate_vsprojects.py
index 06755f62f5..f6251d4677 100755
--- a/tools/buildgen/plugins/generate_vsprojects.py
+++ b/tools/buildgen/plugins/generate_vsprojects.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Buildgen vsprojects plugin.
 
 This parses the list of libraries, and generates globals "vsprojects"
@@ -19,62 +18,67 @@ and "vsproject_dict", to be used by the visual studio generators.
 
 """
 
-
 import hashlib
 import re
 
 
 def mako_plugin(dictionary):
-  """The exported plugin code for generate_vsprojeccts
+    """The exported plugin code for generate_vsprojeccts
 
   We want to help the work of the visual studio generators.
 
   """
 
-  libs = dictionary.get('libs', [])
-  targets = dictionary.get('targets', [])
-
-  for lib in libs:
-    lib['is_library'] = True
-  for target in targets:
-    target['is_library'] = False
-
-  projects = []
-  projects.extend(libs)
-  projects.extend(targets)
-  for target in projects:
-    if 'build' in target and target['build'] == 'test':
-      default_test_dir = 'test'
-    else:
-      default_test_dir = '.'
-    if 'vs_config_type' not in target:
-      if 'build' in target and target['build'] == 'test':
-        target['vs_config_type'] = 'Application'
-      else:
-        target['vs_config_type'] = 'StaticLibrary'
-    if 'vs_packages' not in target:
-      target['vs_packages'] = []
-    if 'vs_props' not in target:
-      target['vs_props'] = []
-    target['vs_proj_dir'] = target.get('vs_proj_dir', default_test_dir)
-    if target.get('vs_project_guid', None) is None and 'windows' in target.get('platforms', ['windows']):
-      name = target['name']
-      guid = re.sub('(........)(....)(....)(....)(.*)',
-             r'{\1-\2-\3-\4-\5}',
-             hashlib.md5(name).hexdigest())
-      target['vs_project_guid'] = guid.upper()
-  # Exclude projects without a visual project guid, such as the tests.
-  projects = [project for project in projects
-                if project.get('vs_project_guid', None)]
-
-  projects = [project for project in projects
-                if project['language'] != 'c++' or project['build'] == 'all' or project['build'] == 'protoc' or (project['language'] == 'c++' and  (project['build'] == 'test' or project['build'] == 'private'))]
-
-  project_dict = dict([(p['name'], p) for p in projects])
-
-  packages = dictionary.get('vspackages', [])
-  packages_dict = dict([(p['name'], p) for p in packages])
-
-  dictionary['vsprojects'] = projects
-  dictionary['vsproject_dict'] = project_dict
-  dictionary['vspackages_dict'] = packages_dict
+    libs = dictionary.get('libs', [])
+    targets = dictionary.get('targets', [])
+
+    for lib in libs:
+        lib['is_library'] = True
+    for target in targets:
+        target['is_library'] = False
+
+    projects = []
+    projects.extend(libs)
+    projects.extend(targets)
+    for target in projects:
+        if 'build' in target and target['build'] == 'test':
+            default_test_dir = 'test'
+        else:
+            default_test_dir = '.'
+        if 'vs_config_type' not in target:
+            if 'build' in target and target['build'] == 'test':
+                target['vs_config_type'] = 'Application'
+            else:
+                target['vs_config_type'] = 'StaticLibrary'
+        if 'vs_packages' not in target:
+            target['vs_packages'] = []
+        if 'vs_props' not in target:
+            target['vs_props'] = []
+        target['vs_proj_dir'] = target.get('vs_proj_dir', default_test_dir)
+        if target.get('vs_project_guid',
+                      None) is None and 'windows' in target.get('platforms',
+                                                                ['windows']):
+            name = target['name']
+            guid = re.sub('(........)(....)(....)(....)(.*)',
+                          r'{\1-\2-\3-\4-\5}', hashlib.md5(name).hexdigest())
+            target['vs_project_guid'] = guid.upper()
+    # Exclude projects without a visual project guid, such as the tests.
+    projects = [
+        project for project in projects if project.get('vs_project_guid', None)
+    ]
+
+    projects = [
+        project for project in projects
+        if project['language'] != 'c++' or project['build'] == 'all' or project[
+            'build'] == 'protoc' or (project['language'] == 'c++' and (project[
+                'build'] == 'test' or project['build'] == 'private'))
+    ]
+
+    project_dict = dict([(p['name'], p) for p in projects])
+
+    packages = dictionary.get('vspackages', [])
+    packages_dict = dict([(p['name'], p) for p in packages])
+
+    dictionary['vsprojects'] = projects
+    dictionary['vsproject_dict'] = project_dict
+    dictionary['vspackages_dict'] = packages_dict
diff --git a/tools/buildgen/plugins/list_api.py b/tools/buildgen/plugins/list_api.py
index bed98dafe3..f7ecb97666 100755
--- a/tools/buildgen/plugins/list_api.py
+++ b/tools/buildgen/plugins/list_api.py
@@ -21,44 +21,47 @@ import re
 import sys
 import yaml
 
-
 _RE_API = r'(?:GPRAPI|GRPCAPI|CENSUSAPI)([^;]*);'
 
 
 def list_c_apis(filenames):
-  for filename in filenames:
-    with open(filename, 'r') as f:
-      text = f.read()
-    for m in re.finditer(_RE_API, text):
-      api_declaration = re.sub('[ \r\n\t]+', ' ', m.group(1))
-      type_and_name, args_and_close = api_declaration.split('(', 1)
-      args = args_and_close[:args_and_close.rfind(')')].strip()
-      last_space = type_and_name.rfind(' ')
-      last_star = type_and_name.rfind('*')
-      type_end = max(last_space, last_star)
-      return_type = type_and_name[0:type_end+1].strip()
-      name = type_and_name[type_end+1:].strip()
-      yield {'return_type': return_type, 'name': name, 'arguments': args, 'header': filename}
+    for filename in filenames:
+        with open(filename, 'r') as f:
+            text = f.read()
+        for m in re.finditer(_RE_API, text):
+            api_declaration = re.sub('[ \r\n\t]+', ' ', m.group(1))
+            type_and_name, args_and_close = api_declaration.split('(', 1)
+            args = args_and_close[:args_and_close.rfind(')')].strip()
+            last_space = type_and_name.rfind(' ')
+            last_star = type_and_name.rfind('*')
+            type_end = max(last_space, last_star)
+            return_type = type_and_name[0:type_end + 1].strip()
+            name = type_and_name[type_end + 1:].strip()
+            yield {
+                'return_type': return_type,
+                'name': name,
+                'arguments': args,
+                'header': filename
+            }
 
 
 def headers_under(directory):
-  for root, dirnames, filenames in os.walk(directory):
-    for filename in fnmatch.filter(filenames, '*.h'):
-      yield os.path.join(root, filename)
+    for root, dirnames, filenames in os.walk(directory):
+        for filename in fnmatch.filter(filenames, '*.h'):
+            yield os.path.join(root, filename)
 
 
 def mako_plugin(dictionary):
-  apis = []
-  headers = []
+    apis = []
+    headers = []
 
-  for lib in dictionary['libs']:
-    if lib['name'] in ['grpc', 'gpr']:
-      headers.extend(lib['public_headers'])
+    for lib in dictionary['libs']:
+        if lib['name'] in ['grpc', 'gpr']:
+            headers.extend(lib['public_headers'])
 
-  apis.extend(list_c_apis(sorted(set(headers))))
-  dictionary['c_apis'] = apis
+    apis.extend(list_c_apis(sorted(set(headers))))
+    dictionary['c_apis'] = apis
 
 
 if __name__ == '__main__':
-  print yaml.dump([api for api in list_c_apis(headers_under('include/grpc'))])
-
+    print yaml.dump([api for api in list_c_apis(headers_under('include/grpc'))])
diff --git a/tools/buildgen/plugins/list_protos.py b/tools/buildgen/plugins/list_protos.py
index 07a860c8af..0aa5fe55d2 100755
--- a/tools/buildgen/plugins/list_protos.py
+++ b/tools/buildgen/plugins/list_protos.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Buildgen .proto files list plugin.
 
 This parses the list of targets from the yaml build file, and creates
@@ -19,12 +18,11 @@ a list called "protos" that contains all of the proto file names.
 
 """
 
-
 import re
 
 
 def mako_plugin(dictionary):
-  """The exported plugin code for list_protos.
+    """The exported plugin code for list_protos.
 
   Some projects generators may want to get the full list of unique .proto files
   that are being included in a project. This code extracts all files referenced
@@ -33,23 +31,23 @@ def mako_plugin(dictionary):
 
   """
 
-  libs = dictionary.get('libs', [])
-  targets = dictionary.get('targets', [])
+    libs = dictionary.get('libs', [])
+    targets = dictionary.get('targets', [])
 
-  proto_re = re.compile('(.*)\\.proto')
+    proto_re = re.compile('(.*)\\.proto')
 
-  protos = set()
-  for lib in libs:
-    for src in lib.get('src', []):
-      m = proto_re.match(src)
-      if m:
-        protos.add(m.group(1))
-  for tgt in targets:
-    for src in tgt.get('src', []):
-      m = proto_re.match(src)
-      if m:
-        protos.add(m.group(1))
+    protos = set()
+    for lib in libs:
+        for src in lib.get('src', []):
+            m = proto_re.match(src)
+            if m:
+                protos.add(m.group(1))
+    for tgt in targets:
+        for src in tgt.get('src', []):
+            m = proto_re.match(src)
+            if m:
+                protos.add(m.group(1))
 
-  protos = sorted(protos)
+    protos = sorted(protos)
 
-  dictionary['protos'] = protos
+    dictionary['protos'] = protos
diff --git a/tools/buildgen/plugins/make_fuzzer_tests.py b/tools/buildgen/plugins/make_fuzzer_tests.py
index 56dad2d561..f644a7c272 100644
--- a/tools/buildgen/plugins/make_fuzzer_tests.py
+++ b/tools/buildgen/plugins/make_fuzzer_tests.py
@@ -11,35 +11,37 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Create tests for each fuzzer"""
 
 import copy
 import glob
 
+
 def mako_plugin(dictionary):
-  targets = dictionary['targets']
-  tests = dictionary['tests']
-  for tgt in targets:
-    if tgt['build'] == 'fuzzer':
-      new_target = copy.deepcopy(tgt)
-      new_target['build'] = 'test'
-      new_target['name'] += '_one_entry'
-      new_target['run'] = False
-      new_target['src'].append('test/core/util/one_corpus_entry_fuzzer.cc')
-      new_target['own_src'].append('test/core/util/one_corpus_entry_fuzzer.cc')
-      targets.append(new_target)
-      for corpus in new_target['corpus_dirs']:
-        for fn in sorted(glob.glob('%s/*' % corpus)):
-          tests.append({
-              'name': new_target['name'],
-              'args': [fn],
-              'exclude_iomgrs': ['uv'],
-              'exclude_configs': ['tsan'],
-              'uses_polling': False,
-              'platforms': ['mac', 'linux'],
-              'ci_platforms': ['linux'],
-              'flaky': False,
-              'language': 'c',
-              'cpu_cost': 0.1,
-          })
+    targets = dictionary['targets']
+    tests = dictionary['tests']
+    for tgt in targets:
+        if tgt['build'] == 'fuzzer':
+            new_target = copy.deepcopy(tgt)
+            new_target['build'] = 'test'
+            new_target['name'] += '_one_entry'
+            new_target['run'] = False
+            new_target['src'].append(
+                'test/core/util/one_corpus_entry_fuzzer.cc')
+            new_target['own_src'].append(
+                'test/core/util/one_corpus_entry_fuzzer.cc')
+            targets.append(new_target)
+            for corpus in new_target['corpus_dirs']:
+                for fn in sorted(glob.glob('%s/*' % corpus)):
+                    tests.append({
+                        'name': new_target['name'],
+                        'args': [fn],
+                        'exclude_iomgrs': ['uv'],
+                        'exclude_configs': ['tsan'],
+                        'uses_polling': False,
+                        'platforms': ['mac', 'linux'],
+                        'ci_platforms': ['linux'],
+                        'flaky': False,
+                        'language': 'c',
+                        'cpu_cost': 0.1,
+                    })
diff --git a/tools/buildgen/plugins/transitive_dependencies.py b/tools/buildgen/plugins/transitive_dependencies.py
index bf5263e685..5373bca2d1 100644
--- a/tools/buildgen/plugins/transitive_dependencies.py
+++ b/tools/buildgen/plugins/transitive_dependencies.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Buildgen transitive dependencies
 
 This takes the list of libs, node_modules, and targets from our
@@ -20,35 +19,40 @@ of the list of dependencies.
 
 """
 
+
 def get_lib(libs, name):
-  try:
-    return next(lib for lib in libs if lib['name']==name)
-  except StopIteration:
-    return None
+    try:
+        return next(lib for lib in libs if lib['name'] == name)
+    except StopIteration:
+        return None
+
 
 def transitive_deps(lib, libs):
-  if lib is not None and 'deps' in lib:
-    # Recursively call transitive_deps on each dependency, and take the union
-    return set.union(set(lib['deps']),
-                     *[set(transitive_deps(get_lib(libs, dep), libs))
-                       for dep in lib['deps']])
-  else:
-    return set()
+    if lib is not None and 'deps' in lib:
+        # Recursively call transitive_deps on each dependency, and take the union
+        return set.union(
+            set(lib['deps']), *[
+                set(transitive_deps(get_lib(libs, dep), libs))
+                for dep in lib['deps']
+            ])
+    else:
+        return set()
+
 
 def mako_plugin(dictionary):
-  """The exported plugin code for transitive_dependencies.
+    """The exported plugin code for transitive_dependencies.
 
   Iterate over each list and check each item for a deps list. We add a
   transitive_deps property to each with the transitive closure of those
   dependency lists.
   """
-  libs = dictionary.get('libs')
+    libs = dictionary.get('libs')
 
-  for target_name, target_list in dictionary.items():
-    for target in target_list:
-      if isinstance(target, dict) and 'deps' in target:
-        target['transitive_deps'] = transitive_deps(target, libs)
+    for target_name, target_list in dictionary.items():
+        for target in target_list:
+            if isinstance(target, dict) and 'deps' in target:
+                target['transitive_deps'] = transitive_deps(target, libs)
 
-  python_dependencies = dictionary.get('python_dependencies')
-  python_dependencies['transitive_deps'] = (
-      transitive_deps(python_dependencies, libs))
+    python_dependencies = dictionary.get('python_dependencies')
+    python_dependencies['transitive_deps'] = (
+        transitive_deps(python_dependencies, libs))
diff --git a/tools/codegen/core/gen_header_frame.py b/tools/codegen/core/gen_header_frame.py
index 5375c14fd6..7219d4dd86 100755
--- a/tools/codegen/core/gen_header_frame.py
+++ b/tools/codegen/core/gen_header_frame.py
@@ -13,7 +13,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Read from stdin a set of colon separated http headers:
    :path: /foo/bar
    content-type: application/grpc
@@ -24,109 +23,118 @@ import json
 import sys
 import argparse
 
+
 def append_never_indexed(payload_line, n, count, key, value):
-  payload_line.append(0x10)
-  assert(len(key) <= 126)
-  payload_line.append(len(key))
-  payload_line.extend(ord(c) for c in key)
-  assert(len(value) <= 126)
-  payload_line.append(len(value))
-  payload_line.extend(ord(c) for c in value)
+    payload_line.append(0x10)
+    assert (len(key) <= 126)
+    payload_line.append(len(key))
+    payload_line.extend(ord(c) for c in key)
+    assert (len(value) <= 126)
+    payload_line.append(len(value))
+    payload_line.extend(ord(c) for c in value)
+
 
 def append_inc_indexed(payload_line, n, count, key, value):
-  payload_line.append(0x40)
-  assert(len(key) <= 126)
-  payload_line.append(len(key))
-  payload_line.extend(ord(c) for c in key)
-  assert(len(value) <= 126)
-  payload_line.append(len(value))
-  payload_line.extend(ord(c) for c in value)
+    payload_line.append(0x40)
+    assert (len(key) <= 126)
+    payload_line.append(len(key))
+    payload_line.extend(ord(c) for c in key)
+    assert (len(value) <= 126)
+    payload_line.append(len(value))
+    payload_line.extend(ord(c) for c in value)
+
 
 def append_pre_indexed(payload_line, n, count, key, value):
-  payload_line.append(0x80 + 61 + count - n)
+    payload_line.append(0x80 + 61 + count - n)
+
 
 _COMPRESSORS = {
-  'never': append_never_indexed,
-  'inc': append_inc_indexed,
-  'pre': append_pre_indexed,
+    'never': append_never_indexed,
+    'inc': append_inc_indexed,
+    'pre': append_pre_indexed,
 }
 
 argp = argparse.ArgumentParser('Generate header frames')
-argp.add_argument('--set_end_stream', default=False, action='store_const', const=True)
-argp.add_argument('--no_framing', default=False, action='store_const', const=True)
-argp.add_argument('--compression', choices=sorted(_COMPRESSORS.keys()), default='never')
+argp.add_argument(
+    '--set_end_stream', default=False, action='store_const', const=True)
+argp.add_argument(
+    '--no_framing', default=False, action='store_const', const=True)
+argp.add_argument(
+    '--compression', choices=sorted(_COMPRESSORS.keys()), default='never')
 argp.add_argument('--hex', default=False, action='store_const', const=True)
 args = argp.parse_args()
 
 # parse input, fill in vals
 vals = []
 for line in sys.stdin:
-  line = line.strip()
-  if line == '': continue
-  if line[0] == '#': continue
-  key_tail, value = line[1:].split(':')
-  key = (line[0] + key_tail).strip()
-  value = value.strip()
-  vals.append((key, value))
+    line = line.strip()
+    if line == '': continue
+    if line[0] == '#': continue
+    key_tail, value = line[1:].split(':')
+    key = (line[0] + key_tail).strip()
+    value = value.strip()
+    vals.append((key, value))
 
 # generate frame payload binary data
 payload_bytes = []
 if not args.no_framing:
-  payload_bytes.append([]) # reserve space for header
+    payload_bytes.append([])  # reserve space for header
 payload_len = 0
 n = 0
 for key, value in vals:
-  payload_line = []
-  _COMPRESSORS[args.compression](payload_line, n, len(vals), key, value)
-  n += 1
-  payload_len += len(payload_line)
-  payload_bytes.append(payload_line)
+    payload_line = []
+    _COMPRESSORS[args.compression](payload_line, n, len(vals), key, value)
+    n += 1
+    payload_len += len(payload_line)
+    payload_bytes.append(payload_line)
 
 # fill in header
 if not args.no_framing:
-  flags = 0x04  # END_HEADERS
-  if args.set_end_stream:
-    flags |= 0x01  # END_STREAM
-  payload_bytes[0].extend([
-      (payload_len >> 16) & 0xff,
-      (payload_len >> 8) & 0xff,
-      (payload_len) & 0xff,
-      # header frame
-      0x01,
-      # flags
-      flags,
-      # stream id
-      0x00,
-      0x00,
-      0x00,
-      0x01
-  ])
+    flags = 0x04  # END_HEADERS
+    if args.set_end_stream:
+        flags |= 0x01  # END_STREAM
+    payload_bytes[0].extend([
+        (payload_len >> 16) & 0xff,
+        (payload_len >> 8) & 0xff,
+        (payload_len) & 0xff,
+        # header frame
+        0x01,
+        # flags
+        flags,
+        # stream id
+        0x00,
+        0x00,
+        0x00,
+        0x01
+    ])
 
 hex_bytes = [ord(c) for c in "abcdefABCDEF0123456789"]
 
+
 def esc_c(line):
-  out = "\""
-  last_was_hex = False
-  for c in line:
-    if 32 <= c < 127:
-      if c in hex_bytes and last_was_hex:
-        out += "\"\""
-      if c != ord('"'):
-        out += chr(c)
-      else:
-        out += "\\\""
-      last_was_hex = False
-    else:
-      out += "\\x%02x" % c
-      last_was_hex = True
-  return out + "\""
+    out = "\""
+    last_was_hex = False
+    for c in line:
+        if 32 <= c < 127:
+            if c in hex_bytes and last_was_hex:
+                out += "\"\""
+            if c != ord('"'):
+                out += chr(c)
+            else:
+                out += "\\\""
+            last_was_hex = False
+        else:
+            out += "\\x%02x" % c
+            last_was_hex = True
+    return out + "\""
+
 
 # dump bytes
 if args.hex:
-  all_bytes = []
-  for line in payload_bytes:
-    all_bytes.extend(line)
-  print '{%s}' % ', '.join('0x%02x' % c for c in all_bytes)
+    all_bytes = []
+    for line in payload_bytes:
+        all_bytes.extend(line)
+    print '{%s}' % ', '.join('0x%02x' % c for c in all_bytes)
 else:
-  for line in payload_bytes:
-    print esc_c(line)
+    for line in payload_bytes:
+        print esc_c(line)
diff --git a/tools/codegen/core/gen_hpack_tables.c b/tools/codegen/core/gen_hpack_tables.cc
index 73dfa9fbd6..0e7a7b80d8 100644
--- a/tools/codegen/core/gen_hpack_tables.c
+++ b/tools/codegen/core/gen_hpack_tables.cc
@@ -16,7 +16,7 @@
  *
  */
 
-/* generates constant tables for hpack.c */
+/* generates constant tables for hpack.cc */
 
 #include <assert.h>
 #include <stddef.h>
diff --git a/tools/codegen/core/gen_legal_metadata_characters.c b/tools/codegen/core/gen_legal_metadata_characters.cc
index 5e292abb3b..fbabd2464f 100644
--- a/tools/codegen/core/gen_legal_metadata_characters.c
+++ b/tools/codegen/core/gen_legal_metadata_characters.cc
@@ -16,7 +16,7 @@
  *
  */
 
-/* generates constant table for metadata.c */
+/* generates constant table for metadata.cc */
 
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/codegen/core/gen_percent_encoding_tables.c b/tools/codegen/core/gen_percent_encoding_tables.cc
index 49ea5ea53b..a99024e5ed 100644
--- a/tools/codegen/core/gen_percent_encoding_tables.c
+++ b/tools/codegen/core/gen_percent_encoding_tables.cc
@@ -16,7 +16,7 @@
  *
  */
 
-/* generates constant table for metadata.c */
+/* generates constant table for metadata.cc */
 
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/codegen/core/gen_server_registered_method_bad_client_test_body.py b/tools/codegen/core/gen_server_registered_method_bad_client_test_body.py
index 8b5b618e8e..fa87c974f9 100755
--- a/tools/codegen/core/gen_server_registered_method_bad_client_test_body.py
+++ b/tools/codegen/core/gen_server_registered_method_bad_client_test_body.py
@@ -14,48 +14,42 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+
 def esc_c(line):
-  out = "\""
-  last_was_hex = False
-  for c in line:
-    if 32 <= c < 127:
-      if c in hex_bytes and last_was_hex:
-        out += "\"\""
-      if c != ord('"'):
-        out += chr(c)
-      else:
-        out += "\\\""
-      last_was_hex = False
-    else:
-      out += "\\x%02x" % c
-      last_was_hex = True
-  return out + "\""
+    out = "\""
+    last_was_hex = False
+    for c in line:
+        if 32 <= c < 127:
+            if c in hex_bytes and last_was_hex:
+                out += "\"\""
+            if c != ord('"'):
+                out += chr(c)
+            else:
+                out += "\\\""
+            last_was_hex = False
+        else:
+            out += "\\x%02x" % c
+            last_was_hex = True
+    return out + "\""
+
 
 done = set()
 
 for message_length in range(0, 3):
-  for send_message_length in range(0, message_length + 1):
-    payload = [
-      0,
-      (message_length >> 24) & 0xff,
-      (message_length >> 16) & 0xff,
-      (message_length >> 8) & 0xff,
-      (message_length) & 0xff
-    ] + send_message_length * [0]
-    for frame_length in range(0, len(payload) + 1):
-      is_end = frame_length == len(payload) and send_message_length == message_length
-      frame = [
-        (frame_length >> 16) & 0xff,
-        (frame_length >> 8) & 0xff,
-        (frame_length) & 0xff,
-        0,
-        1 if is_end else 0,
-        0, 0, 0, 1
-      ] + payload[0:frame_length]
-      text = esc_c(frame)
-      if text not in done:
-        print 'GRPC_RUN_BAD_CLIENT_TEST(verifier_%s, PFX_STR %s, %s);' % (
-            'succeeds' if is_end else 'fails', 
-            text, 
-            '0' if is_end else 'GRPC_BAD_CLIENT_DISCONNECT')
-        done.add(text)
+    for send_message_length in range(0, message_length + 1):
+        payload = [
+            0, (message_length >> 24) & 0xff, (message_length >> 16) & 0xff,
+            (message_length >> 8) & 0xff, (message_length) & 0xff
+        ] + send_message_length * [0]
+        for frame_length in range(0, len(payload) + 1):
+            is_end = frame_length == len(
+                payload) and send_message_length == message_length
+            frame = [(frame_length >> 16) & 0xff, (frame_length >> 8) & 0xff,
+                     (frame_length) & 0xff, 0, 1
+                     if is_end else 0, 0, 0, 0, 1] + payload[0:frame_length]
+            text = esc_c(frame)
+            if text not in done:
+                print 'GRPC_RUN_BAD_CLIENT_TEST(verifier_%s, PFX_STR %s, %s);' % (
+                    'succeeds' if is_end else 'fails', text, '0'
+                    if is_end else 'GRPC_BAD_CLIENT_DISCONNECT')
+                done.add(text)
diff --git a/tools/codegen/core/gen_settings_ids.py b/tools/codegen/core/gen_settings_ids.py
index 481c4216a3..bc4380605a 100755
--- a/tools/codegen/core/gen_settings_ids.py
+++ b/tools/codegen/core/gen_settings_ids.py
@@ -24,92 +24,114 @@ Setting = collections.namedtuple('Setting', 'id default min max on_error')
 OnError = collections.namedtuple('OnError', 'behavior code')
 clamp_invalid_value = OnError('CLAMP_INVALID_VALUE', 'PROTOCOL_ERROR')
 disconnect_on_invalid_value = lambda e: OnError('DISCONNECT_ON_INVALID_VALUE', e)
-DecoratedSetting = collections.namedtuple('DecoratedSetting', 'enum name setting')
+DecoratedSetting = collections.namedtuple('DecoratedSetting',
+                                          'enum name setting')
 
 _SETTINGS = {
-  'HEADER_TABLE_SIZE': Setting(1, 4096, 0, 0xffffffff, clamp_invalid_value),
-  'ENABLE_PUSH': Setting(2, 1, 0, 1, disconnect_on_invalid_value('PROTOCOL_ERROR')),
-  'MAX_CONCURRENT_STREAMS': Setting(3, 0xffffffff, 0, 0xffffffff, disconnect_on_invalid_value('PROTOCOL_ERROR')),
-  'INITIAL_WINDOW_SIZE': Setting(4, 65535, 0, 0x7fffffff, disconnect_on_invalid_value('FLOW_CONTROL_ERROR')),
-  'MAX_FRAME_SIZE': Setting(5, 16384, 16384, 16777215, disconnect_on_invalid_value('PROTOCOL_ERROR')),
-  'MAX_HEADER_LIST_SIZE': Setting(6, _MAX_HEADER_LIST_SIZE, 0, _MAX_HEADER_LIST_SIZE, clamp_invalid_value),
-  'GRPC_ALLOW_TRUE_BINARY_METADATA': Setting(0xfe03, 0, 0, 1, clamp_invalid_value),
+    'HEADER_TABLE_SIZE':
+    Setting(1, 4096, 0, 0xffffffff, clamp_invalid_value),
+    'ENABLE_PUSH':
+    Setting(2, 1, 0, 1, disconnect_on_invalid_value('PROTOCOL_ERROR')),
+    'MAX_CONCURRENT_STREAMS':
+    Setting(3, 0xffffffff, 0, 0xffffffff,
+            disconnect_on_invalid_value('PROTOCOL_ERROR')),
+    'INITIAL_WINDOW_SIZE':
+    Setting(4, 65535, 0, 0x7fffffff,
+            disconnect_on_invalid_value('FLOW_CONTROL_ERROR')),
+    'MAX_FRAME_SIZE':
+    Setting(5, 16384, 16384, 16777215,
+            disconnect_on_invalid_value('PROTOCOL_ERROR')),
+    'MAX_HEADER_LIST_SIZE':
+    Setting(6, _MAX_HEADER_LIST_SIZE, 0, _MAX_HEADER_LIST_SIZE,
+            clamp_invalid_value),
+    'GRPC_ALLOW_TRUE_BINARY_METADATA':
+    Setting(0xfe03, 0, 0, 1, clamp_invalid_value),
 }
 
 H = open('src/core/ext/transport/chttp2/transport/http2_settings.h', 'w')
 C = open('src/core/ext/transport/chttp2/transport/http2_settings.c', 'w')
 
+
 # utility: print a big comment block into a set of files
 def put_banner(files, banner):
-  for f in files:
-    print >>f, '/*'
-    for line in banner:
-      print >>f, ' * %s' % line
-    print >>f, ' */'
-    print >>f
+    for f in files:
+        print >> f, '/*'
+        for line in banner:
+            print >> f, ' * %s' % line
+        print >> f, ' */'
+        print >> f
+
 
 # copy-paste copyright notice from this file
 with open(sys.argv[0]) as my_source:
-  copyright = []
-  for line in my_source:
-    if line[0] != '#': break
-  for line in my_source:
-    if line[0] == '#':
-      copyright.append(line)
-      break
-  for line in my_source:
-    if line[0] != '#':
-      break
-    copyright.append(line)
-  put_banner([H,C], [line[2:].rstrip() for line in copyright])
-
-put_banner([H,C], ["Automatically generated by tools/codegen/core/gen_settings_ids.py"])
-
-print >>H, "#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HTTP2_SETTINGS_H"
-print >>H, "#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HTTP2_SETTINGS_H"
-print >>H
-print >>H, "#include <stdint.h>"
-print >>H, "#include <stdbool.h>"
-print >>H
-
-print >>C, "#include \"src/core/ext/transport/chttp2/transport/http2_settings.h\""
-print >>C
-print >>C, "#include <grpc/support/useful.h>"
-print >>C, "#include \"src/core/lib/transport/http2_errors.h\""
-print >>C
+    copyright = []
+    for line in my_source:
+        if line[0] != '#': break
+    for line in my_source:
+        if line[0] == '#':
+            copyright.append(line)
+            break
+    for line in my_source:
+        if line[0] != '#':
+            break
+        copyright.append(line)
+    put_banner([H, C], [line[2:].rstrip() for line in copyright])
+
+put_banner(
+    [H, C],
+    ["Automatically generated by tools/codegen/core/gen_settings_ids.py"])
+
+print >> H, "#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HTTP2_SETTINGS_H"
+print >> H, "#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HTTP2_SETTINGS_H"
+print >> H
+print >> H, "#include <stdint.h>"
+print >> H, "#include <stdbool.h>"
+print >> H
+
+print >> C, "#include \"src/core/ext/transport/chttp2/transport/http2_settings.h\""
+print >> C
+print >> C, "#include <grpc/support/useful.h>"
+print >> C, "#include \"src/core/lib/transport/http2_errors.h\""
+print >> C
 
 p = perfection.hash_parameters(sorted(x.id for x in _SETTINGS.values()))
 print p
 
+
 def hash(i):
-  i += p.offset
-  x = i % p.t
-  y = i / p.t
-  return x + p.r[y]
+    i += p.offset
+    x = i % p.t
+    y = i / p.t
+    return x + p.r[y]
+
 
-decorated_settings = [DecoratedSetting(hash(setting.id), name, setting)
-                      for name, setting in _SETTINGS.iteritems()]
+decorated_settings = [
+    DecoratedSetting(hash(setting.id), name, setting)
+    for name, setting in _SETTINGS.iteritems()
+]
 
-print >>H, 'typedef enum {'
+print >> H, 'typedef enum {'
 for decorated_setting in sorted(decorated_settings):
-  print >>H, '  GRPC_CHTTP2_SETTINGS_%s = %d, /* wire id %d */' % (
-      decorated_setting.name, decorated_setting.enum, decorated_setting.setting.id)
-print >>H, '} grpc_chttp2_setting_id;'
-print >>H
-print >>H, '#define GRPC_CHTTP2_NUM_SETTINGS %d' % (max(x.enum for x in decorated_settings) + 1)
-
-print >>H, 'extern const uint16_t grpc_setting_id_to_wire_id[];'
-print >>C, 'const uint16_t grpc_setting_id_to_wire_id[] = {%s};' % ','.join(
+    print >> H, '  GRPC_CHTTP2_SETTINGS_%s = %d, /* wire id %d */' % (
+        decorated_setting.name, decorated_setting.enum,
+        decorated_setting.setting.id)
+print >> H, '} grpc_chttp2_setting_id;'
+print >> H
+print >> H, '#define GRPC_CHTTP2_NUM_SETTINGS %d' % (
+    max(x.enum for x in decorated_settings) + 1)
+
+print >> H, 'extern const uint16_t grpc_setting_id_to_wire_id[];'
+print >> C, 'const uint16_t grpc_setting_id_to_wire_id[] = {%s};' % ','.join(
     '%d' % s for s in p.slots)
-print >>H
-print >>H, "bool grpc_wire_id_to_setting_id(uint32_t wire_id, grpc_chttp2_setting_id *out);"
+print >> H
+print >> H, "bool grpc_wire_id_to_setting_id(uint32_t wire_id, grpc_chttp2_setting_id *out);"
 cgargs = {
-      'r': ','.join('%d' % (r if r is not None else 0) for r in p.r),
-      't': p.t,
-      'offset': abs(p.offset),
-      'offset_sign': '+' if p.offset > 0 else '-'
-  }
-print >>C, """
+    'r': ','.join('%d' % (r if r is not None else 0) for r in p.r),
+    't': p.t,
+    'offset': abs(p.offset),
+    'offset_sign': '+' if p.offset > 0 else '-'
+}
+print >> C, """
 bool grpc_wire_id_to_setting_id(uint32_t wire_id, grpc_chttp2_setting_id *out) {
   uint32_t i = wire_id %(offset_sign)s %(offset)d;
   uint32_t x = i %% %(t)d;
@@ -118,17 +140,17 @@ bool grpc_wire_id_to_setting_id(uint32_t wire_id, grpc_chttp2_setting_id *out) {
   switch (y) {
 """ % cgargs
 for i, r in enumerate(p.r):
-  if not r: continue
-  if r < 0: print >>C, 'case %d: h -= %d; break;' % (i, -r)
-  else: print >>C, 'case %d: h += %d; break;' % (i, r)
-print >>C, """
+    if not r: continue
+    if r < 0: print >> C, 'case %d: h -= %d; break;' % (i, -r)
+    else: print >> C, 'case %d: h += %d; break;' % (i, r)
+print >> C, """
   }
   *out = (grpc_chttp2_setting_id)h;
   return h < GPR_ARRAY_SIZE(grpc_setting_id_to_wire_id) && grpc_setting_id_to_wire_id[h] == wire_id;
 }
 """ % cgargs
 
-print >>H, """
+print >> H, """
 typedef enum {
   GRPC_CHTTP2_CLAMP_INVALID_VALUE,
   GRPC_CHTTP2_DISCONNECT_ON_INVALID_VALUE
@@ -145,25 +167,22 @@ typedef struct {
 
 extern const grpc_chttp2_setting_parameters grpc_chttp2_settings_parameters[GRPC_CHTTP2_NUM_SETTINGS];
 """
-print >>C, "const grpc_chttp2_setting_parameters grpc_chttp2_settings_parameters[GRPC_CHTTP2_NUM_SETTINGS] = {"
+print >> C, "const grpc_chttp2_setting_parameters grpc_chttp2_settings_parameters[GRPC_CHTTP2_NUM_SETTINGS] = {"
 i = 0
 for decorated_setting in sorted(decorated_settings):
-  while i < decorated_setting.enum:
-    print >>C, "{NULL, 0, 0, 0, GRPC_CHTTP2_DISCONNECT_ON_INVALID_VALUE, GRPC_HTTP2_PROTOCOL_ERROR},"
+    while i < decorated_setting.enum:
+        print >> C, "{NULL, 0, 0, 0, GRPC_CHTTP2_DISCONNECT_ON_INVALID_VALUE, GRPC_HTTP2_PROTOCOL_ERROR},"
+        i += 1
+    print >> C, "{\"%s\", %du, %du, %du, GRPC_CHTTP2_%s, GRPC_HTTP2_%s}," % (
+        decorated_setting.name, decorated_setting.setting.default,
+        decorated_setting.setting.min, decorated_setting.setting.max,
+        decorated_setting.setting.on_error.behavior,
+        decorated_setting.setting.on_error.code,)
     i += 1
-  print >>C, "{\"%s\", %du, %du, %du, GRPC_CHTTP2_%s, GRPC_HTTP2_%s}," % (
-    decorated_setting.name,
-    decorated_setting.setting.default,
-    decorated_setting.setting.min,
-    decorated_setting.setting.max,
-    decorated_setting.setting.on_error.behavior,
-    decorated_setting.setting.on_error.code,
-  )
-  i += 1
-print >>C, "};"
-
-print >>H
-print >>H, "#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HTTP2_SETTINGS_H */"
+print >> C, "};"
+
+print >> H
+print >> H, "#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HTTP2_SETTINGS_H */"
 
 H.close()
 C.close()
diff --git a/tools/codegen/core/gen_static_metadata.py b/tools/codegen/core/gen_static_metadata.py
index 355f3f4e23..9d99bbf096 100755
--- a/tools/codegen/core/gen_static_metadata.py
+++ b/tools/codegen/core/gen_static_metadata.py
@@ -172,65 +172,66 @@ STREAM_COMPRESSION_ALGORITHMS = [
     'gzip',
 ]
 
+
 # utility: mangle the name of a config
 def mangle(elem, name=None):
-  xl = {
-      '-': '_',
-      ':': '',
-      '/': 'slash',
-      '.': 'dot',
-      ',': 'comma',
-      ' ': '_',
-  }
+    xl = {
+        '-': '_',
+        ':': '',
+        '/': 'slash',
+        '.': 'dot',
+        ',': 'comma',
+        ' ': '_',
+    }
 
-  def m0(x):
-    if not x:
-      return 'empty'
-    r = ''
-    for c in x:
-      put = xl.get(c, c.lower())
-      if not put:
-        continue
-      last_is_underscore = r[-1] == '_' if r else True
-      if last_is_underscore and put == '_':
-        continue
-      elif len(put) > 1:
-        if not last_is_underscore:
-          r += '_'
-        r += put
-        r += '_'
-      else:
-        r += put
-    if r[-1] == '_':
-      r = r[:-1]
-    return r
-
-  def n(default, name=name):
-    if name is None:
-      return 'grpc_%s_' % default
-    if name == '':
-      return ''
-    return 'grpc_%s_' % name
-
-  if isinstance(elem, tuple):
-    return '%s%s_%s' % (n('mdelem'), m0(elem[0]), m0(elem[1]))
-  else:
-    return '%s%s' % (n('mdstr'), m0(elem))
+    def m0(x):
+        if not x:
+            return 'empty'
+        r = ''
+        for c in x:
+            put = xl.get(c, c.lower())
+            if not put:
+                continue
+            last_is_underscore = r[-1] == '_' if r else True
+            if last_is_underscore and put == '_':
+                continue
+            elif len(put) > 1:
+                if not last_is_underscore:
+                    r += '_'
+                r += put
+                r += '_'
+            else:
+                r += put
+        if r[-1] == '_':
+            r = r[:-1]
+        return r
+
+    def n(default, name=name):
+        if name is None:
+            return 'grpc_%s_' % default
+        if name == '':
+            return ''
+        return 'grpc_%s_' % name
+
+    if isinstance(elem, tuple):
+        return '%s%s_%s' % (n('mdelem'), m0(elem[0]), m0(elem[1]))
+    else:
+        return '%s%s' % (n('mdstr'), m0(elem))
 
 
 # utility: generate some hash value for a string
 def fake_hash(elem):
-  return hashlib.md5(elem).hexdigest()[0:8]
+    return hashlib.md5(elem).hexdigest()[0:8]
 
 
 # utility: print a big comment block into a set of files
 def put_banner(files, banner):
-  for f in files:
-    print >> f, '/*'
-    for line in banner:
-      print >> f, ' * %s' % line
-    print >> f, ' */'
-    print >> f
+    for f in files:
+        print >> f, '/*'
+        for line in banner:
+            print >> f, ' * %s' % line
+        print >> f, ' */'
+        print >> f
 
 
 # build a list of all the strings we need
@@ -240,43 +241,43 @@ static_userdata = {}
 # put metadata batch callouts first, to make the check of if a static metadata
 # string is a callout trivial
 for elem, _ in METADATA_BATCH_CALLOUTS:
-  if elem not in all_strs:
-    all_strs.append(elem)
-for elem in CONFIG:
-  if isinstance(elem, tuple):
-    if elem[0] not in all_strs:
-      all_strs.append(elem[0])
-    if elem[1] not in all_strs:
-      all_strs.append(elem[1])
-    if elem not in all_elems:
-      all_elems.append(elem)
-  else:
     if elem not in all_strs:
-      all_strs.append(elem)
+        all_strs.append(elem)
+for elem in CONFIG:
+    if isinstance(elem, tuple):
+        if elem[0] not in all_strs:
+            all_strs.append(elem[0])
+        if elem[1] not in all_strs:
+            all_strs.append(elem[1])
+        if elem not in all_elems:
+            all_elems.append(elem)
+    else:
+        if elem not in all_strs:
+            all_strs.append(elem)
 compression_elems = []
 for mask in range(1, 1 << len(COMPRESSION_ALGORITHMS)):
-  val = ','.join(COMPRESSION_ALGORITHMS[alg]
-                 for alg in range(0, len(COMPRESSION_ALGORITHMS))
-                 if (1 << alg) & mask)
-  elem = ('grpc-accept-encoding', val)
-  if val not in all_strs:
-    all_strs.append(val)
-  if elem not in all_elems:
-    all_elems.append(elem)
-  compression_elems.append(elem)
-  static_userdata[elem] = 1 + (mask | 1)
+    val = ','.join(COMPRESSION_ALGORITHMS[alg]
+                   for alg in range(0, len(COMPRESSION_ALGORITHMS))
+                   if (1 << alg) & mask)
+    elem = ('grpc-accept-encoding', val)
+    if val not in all_strs:
+        all_strs.append(val)
+    if elem not in all_elems:
+        all_elems.append(elem)
+    compression_elems.append(elem)
+    static_userdata[elem] = 1 + (mask | 1)
 stream_compression_elems = []
 for mask in range(1, 1 << len(STREAM_COMPRESSION_ALGORITHMS)):
-  val = ','.join(STREAM_COMPRESSION_ALGORITHMS[alg]
-                 for alg in range(0, len(STREAM_COMPRESSION_ALGORITHMS))
-                 if (1 << alg) & mask)
-  elem = ('accept-encoding', val)
-  if val not in all_strs:
-    all_strs.append(val)
-  if elem not in all_elems:
-    all_elems.append(elem)
-  stream_compression_elems.append(elem)
-  static_userdata[elem] = 1 + (mask | 1)
+    val = ','.join(STREAM_COMPRESSION_ALGORITHMS[alg]
+                   for alg in range(0, len(STREAM_COMPRESSION_ALGORITHMS))
+                   if (1 << alg) & mask)
+    elem = ('accept-encoding', val)
+    if val not in all_strs:
+        all_strs.append(val)
+    if elem not in all_elems:
+        all_elems.append(elem)
+    stream_compression_elems.append(elem)
+    static_userdata[elem] = 1 + (mask | 1)
 
 # output configuration
 args = sys.argv[1:]
@@ -284,62 +285,62 @@ H = None
 C = None
 D = None
 if args:
-  if 'header' in args:
-    H = sys.stdout
-  else:
-    H = open('/dev/null', 'w')
-  if 'source' in args:
-    C = sys.stdout
-  else:
-    C = open('/dev/null', 'w')
-  if 'dictionary' in args:
-    D = sys.stdout
-  else:
-    D = open('/dev/null', 'w')
+    if 'header' in args:
+        H = sys.stdout
+    else:
+        H = open('/dev/null', 'w')
+    if 'source' in args:
+        C = sys.stdout
+    else:
+        C = open('/dev/null', 'w')
+    if 'dictionary' in args:
+        D = sys.stdout
+    else:
+        D = open('/dev/null', 'w')
 else:
-  H = open(
-      os.path.join(
-          os.path.dirname(sys.argv[0]),
-          '../../../src/core/lib/transport/static_metadata.h'), 'w')
-  C = open(
-      os.path.join(
-          os.path.dirname(sys.argv[0]),
-          '../../../src/core/lib/transport/static_metadata.cc'), 'w')
-  D = open(
-      os.path.join(
-          os.path.dirname(sys.argv[0]),
-          '../../../test/core/end2end/fuzzers/hpack.dictionary'), 'w')
+    H = open(
+        os.path.join(
+            os.path.dirname(sys.argv[0]),
+            '../../../src/core/lib/transport/static_metadata.h'), 'w')
+    C = open(
+        os.path.join(
+            os.path.dirname(sys.argv[0]),
+            '../../../src/core/lib/transport/static_metadata.cc'), 'w')
+    D = open(
+        os.path.join(
+            os.path.dirname(sys.argv[0]),
+            '../../../test/core/end2end/fuzzers/hpack.dictionary'), 'w')
 
 # copy-paste copyright notice from this file
 with open(sys.argv[0]) as my_source:
-  copyright = []
-  for line in my_source:
-    if line[0] != '#':
-      break
-  for line in my_source:
-    if line[0] == '#':
-      copyright.append(line)
-      break
-  for line in my_source:
-    if line[0] != '#':
-      break
-    copyright.append(line)
-  put_banner([H, C], [line[2:].rstrip() for line in copyright])
+    copyright = []
+    for line in my_source:
+        if line[0] != '#':
+            break
+    for line in my_source:
+        if line[0] == '#':
+            copyright.append(line)
+            break
+    for line in my_source:
+        if line[0] != '#':
+            break
+        copyright.append(line)
+    put_banner([H, C], [line[2:].rstrip() for line in copyright])
 
 hex_bytes = [ord(c) for c in 'abcdefABCDEF0123456789']
 
 
 def esc_dict(line):
-  out = "\""
-  for c in line:
-    if 32 <= c < 127:
-      if c != ord('"'):
-        out += chr(c)
-      else:
-        out += "\\\""
-    else:
-      out += '\\x%02X' % c
-  return out + "\""
+    out = "\""
+    for c in line:
+        if 32 <= c < 127:
+            if c != ord('"'):
+                out += chr(c)
+            else:
+                out += "\\\""
+        else:
+            out += '\\x%02X' % c
+    return out + "\""
 
 
 put_banner([H, C], """WARNING: Auto-generated code.
@@ -347,17 +348,13 @@ put_banner([H, C], """WARNING: Auto-generated code.
 To make changes to this file, change
 tools/codegen/core/gen_static_metadata.py, and then re-run it.
 
-See metadata.h for an explanation of the interface here, and metadata.c for
+See metadata.h for an explanation of the interface here, and metadata.cc for
 an explanation of what's going on.
 """.splitlines())
 
 print >> H, '#ifndef GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H'
 print >> H, '#define GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H'
 print >> H
-print >> H, '#ifdef __cplusplus'
-print >> H, 'extern "C" {'
-print >> H, '#endif'
-print >> H
 print >> H, '#include "src/core/lib/transport/metadata.h"'
 print >> H
 
@@ -369,33 +366,32 @@ print >> C
 str_ofs = 0
 id2strofs = {}
 for i, elem in enumerate(all_strs):
-  id2strofs[i] = str_ofs
-  str_ofs += len(elem)
+    id2strofs[i] = str_ofs
+    str_ofs += len(elem)
 
 
 def slice_def(i):
-  return ('{&grpc_static_metadata_refcounts[%d],'
-          ' {{g_bytes+%d, %d}}}') % (
-      i, id2strofs[i], len(all_strs[i]))
+    return ('{&grpc_static_metadata_refcounts[%d],'
+            ' {{g_bytes+%d, %d}}}') % (i, id2strofs[i], len(all_strs[i]))
 
 
 # validate configuration
 for elem, _ in METADATA_BATCH_CALLOUTS:
-  assert elem in all_strs
+    assert elem in all_strs
 
 print >> H, '#define GRPC_STATIC_MDSTR_COUNT %d' % len(all_strs)
 print >> H, ('extern const grpc_slice '
              'grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT];')
 for i, elem in enumerate(all_strs):
-  print >> H, '/* "%s" */' % elem
-  print >> H, '#define %s (grpc_static_slice_table[%d])' % (
-      mangle(elem).upper(), i)
+    print >> H, '/* "%s" */' % elem
+    print >> H, '#define %s (grpc_static_slice_table[%d])' % (
+        mangle(elem).upper(), i)
 print >> H
 print >> C, 'static uint8_t g_bytes[] = {%s};' % (
     ','.join('%d' % ord(c) for c in ''.join(all_strs)))
 print >> C
 print >> C, 'static void static_ref(void *unused) {}'
-print >> C, 'static void static_unref(grpc_exec_ctx *exec_ctx, void *unused) {}'
+print >> C, 'static void static_unref(void *unused) {}'
 print >> C, ('static const grpc_slice_refcount_vtable static_sub_vtable = '
              '{static_ref, static_unref, grpc_slice_default_eq_impl, '
              'grpc_slice_default_hash_impl};')
@@ -411,7 +407,7 @@ print >> H, ('extern grpc_slice_refcount '
 print >> C, ('grpc_slice_refcount '
              'grpc_static_metadata_refcounts[GRPC_STATIC_MDSTR_COUNT] = {')
 for i, elem in enumerate(all_strs):
-  print >> C, '  {&grpc_static_metadata_vtable, &static_sub_refcnt},'
+    print >> C, '  {&grpc_static_metadata_vtable, &static_sub_refcnt},'
 print >> C, '};'
 print >> C
 print >> H, '#define GRPC_IS_STATIC_METADATA_STRING(slice) \\'
@@ -421,7 +417,7 @@ print >> H
 print >> C, ('const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT]'
              ' = {')
 for i, elem in enumerate(all_strs):
-  print >> C, slice_def(i) + ','
+    print >> C, slice_def(i) + ','
 print >> C, '};'
 print >> C
 print >> H, '#define GRPC_STATIC_METADATA_INDEX(static_slice) \\'
@@ -431,10 +427,10 @@ print >> H
 
 print >> D, '# hpack fuzzing dictionary'
 for i, elem in enumerate(all_strs):
-  print >> D, '%s' % (esc_dict([len(elem)] + [ord(c) for c in elem]))
+    print >> D, '%s' % (esc_dict([len(elem)] + [ord(c) for c in elem]))
 for i, elem in enumerate(all_elems):
-  print >> D, '%s' % (esc_dict([0, len(elem[0])] + [ord(c) for c in elem[0]] +
-                               [len(elem[1])] + [ord(c) for c in elem[1]]))
+    print >> D, '%s' % (esc_dict([0, len(elem[0])] + [ord(c) for c in elem[0]] +
+                                 [len(elem[1])] + [ord(c) for c in elem[1]]))
 
 print >> H, '#define GRPC_STATIC_MDELEM_COUNT %d' % len(all_elems)
 print >> H, ('extern grpc_mdelem_data '
@@ -442,10 +438,9 @@ print >> H, ('extern grpc_mdelem_data '
 print >> H, ('extern uintptr_t '
              'grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT];')
 for i, elem in enumerate(all_elems):
-  print >> H, '/* "%s": "%s" */' % elem
-  print >> H, ('#define %s (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[%d], '
-               'GRPC_MDELEM_STORAGE_STATIC))') % (
-      mangle(elem).upper(), i)
+    print >> H, '/* "%s": "%s" */' % elem
+    print >> H, ('#define %s (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[%d], '
+                 'GRPC_MDELEM_STORAGE_STATIC))') % (mangle(elem).upper(), i)
 print >> H
 print >> C, ('uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT] '
              '= {')
@@ -456,42 +451,38 @@ print >> C
 
 
 def str_idx(s):
-  for i, s2 in enumerate(all_strs):
-    if s == s2:
-      return i
+    for i, s2 in enumerate(all_strs):
+        if s == s2:
+            return i
 
 
 def md_idx(m):
-  for i, m2 in enumerate(all_elems):
-    if m == m2:
-      return i
+    for i, m2 in enumerate(all_elems):
+        if m == m2:
+            return i
 
 
 def offset_trials(mink):
-  yield 0
-  for i in range(1, 100):
-    for mul in [-1, 1]:
-      yield mul * i
+    yield 0
+    for i in range(1, 100):
+        for mul in [-1, 1]:
+            yield mul * i
 
 
 def perfect_hash(keys, name):
-  p = perfection.hash_parameters(keys)
-
-  def f(i, p=p):
-    i += p.offset
-    x = i % p.t
-    y = i / p.t
-    return x + p.r[y]
-
-  return {
-      'PHASHRANGE':
-          p.t - 1 + max(p.r),
-      'PHASHNKEYS':
-          len(p.slots),
-      'pyfunc':
-          f,
-      'code':
-          """
+    p = perfection.hash_parameters(keys)
+
+    def f(i, p=p):
+        i += p.offset
+        x = i % p.t
+        y = i / p.t
+        return x + p.r[y]
+
+    return {
+        'PHASHRANGE': p.t - 1 + max(p.r),
+        'PHASHNKEYS': len(p.slots),
+        'pyfunc': f,
+        'code': """
 static const int8_t %(name)s_r[] = {%(r)s};
 static uint32_t %(name)s_phash(uint32_t i) {
   i %(offset_sign)s= %(offset)d;
@@ -505,13 +496,13 @@ static uint32_t %(name)s_phash(uint32_t i) {
   return h;
 }
     """ % {
-        'name': name,
-        'r': ','.join('%d' % (r if r is not None else 0) for r in p.r),
-        't': p.t,
-        'offset': abs(p.offset),
-        'offset_sign': '+' if p.offset > 0 else '-'
+            'name': name,
+            'r': ','.join('%d' % (r if r is not None else 0) for r in p.r),
+            't': p.t,
+            'offset': abs(p.offset),
+            'offset_sign': '+' if p.offset > 0 else '-'
+        }
     }
-  }
 
 
 elem_keys = [
@@ -523,14 +514,14 @@ print >> C, elem_hash['code']
 keys = [0] * int(elem_hash['PHASHRANGE'])
 idxs = [255] * int(elem_hash['PHASHNKEYS'])
 for i, k in enumerate(elem_keys):
-  h = elem_hash['pyfunc'](k)
-  assert keys[h] == 0
-  keys[h] = k
-  idxs[h] = i
+    h = elem_hash['pyfunc'](k)
+    assert keys[h] == 0
+    keys[h] = k
+    idxs[h] = i
 print >> C, 'static const uint16_t elem_keys[] = {%s};' % ','.join(
     '%d' % k for k in keys)
-print >> C, 'static const uint8_t elem_idxs[] = {%s};' % ','.join(
-    '%d' % i for i in idxs)
+print >> C, 'static const uint8_t elem_idxs[] = {%s};' % ','.join('%d' % i
+                                                                  for i in idxs)
 print >> C
 
 print >> H, 'grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b);'
@@ -544,12 +535,12 @@ print >> C
 
 print >> C, 'grpc_mdelem_data grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT] = {'
 for a, b in all_elems:
-  print >> C, '{%s,%s},' % (slice_def(str_idx(a)), slice_def(str_idx(b)))
+    print >> C, '{%s,%s},' % (slice_def(str_idx(a)), slice_def(str_idx(b)))
 print >> C, '};'
 
 print >> H, 'typedef enum {'
 for elem, _ in METADATA_BATCH_CALLOUTS:
-  print >> H, '  %s,' % mangle(elem, 'batch').upper()
+    print >> H, '  %s,' % mangle(elem, 'batch').upper()
 print >> H, '  GRPC_BATCH_CALLOUTS_COUNT'
 print >> H, '} grpc_metadata_batch_callouts_index;'
 print >> H
@@ -557,7 +548,7 @@ print >> H, 'typedef union {'
 print >> H, '  struct grpc_linked_mdelem *array[GRPC_BATCH_CALLOUTS_COUNT];'
 print >> H, '  struct {'
 for elem, _ in METADATA_BATCH_CALLOUTS:
-  print >> H, '  struct grpc_linked_mdelem *%s;' % mangle(elem, '').lower()
+    print >> H, '  struct grpc_linked_mdelem *%s;' % mangle(elem, '').lower()
 print >> H, '  } named;'
 print >> H, '} grpc_metadata_batch_callouts;'
 print >> H
@@ -569,7 +560,7 @@ print >> H, ('extern bool grpc_static_callout_is_default['
 print >> H
 print >> C, 'bool grpc_static_callout_is_default[GRPC_BATCH_CALLOUTS_COUNT] = {'
 for elem, is_default in METADATA_BATCH_CALLOUTS:
-  print >> C, '  %s, // %s' % (str(is_default).lower(), elem)
+    print >> C, '  %s, // %s' % (str(is_default).lower(), elem)
 print >> C, '};'
 print >> C
 
@@ -588,15 +579,12 @@ print >> H, 'extern const uint8_t grpc_static_accept_stream_encoding_metadata[%d
     1 << len(STREAM_COMPRESSION_ALGORITHMS))
 print >> C, 'const uint8_t grpc_static_accept_stream_encoding_metadata[%d] = {' % (
     1 << len(STREAM_COMPRESSION_ALGORITHMS))
-print >> C, '0,%s' % ','.join('%d' % md_idx(elem) for elem in stream_compression_elems)
+print >> C, '0,%s' % ','.join('%d' % md_idx(elem)
+                              for elem in stream_compression_elems)
 print >> C, '};'
 
 print >> H, '#define GRPC_MDELEM_ACCEPT_STREAM_ENCODING_FOR_ALGORITHMS(algs) (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[grpc_static_accept_stream_encoding_metadata[(algs)]], GRPC_MDELEM_STORAGE_STATIC))'
 
-print >> H, '#ifdef __cplusplus'
-print >> H, '}'
-print >> H, '#endif'
-
 print >> H, '#endif /* GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H */'
 
 H.close()
diff --git a/tools/codegen/core/gen_stats_data.py b/tools/codegen/core/gen_stats_data.py
index 072a677615..93f2035c45 100755
--- a/tools/codegen/core/gen_stats_data.py
+++ b/tools/codegen/core/gen_stats_data.py
@@ -22,397 +22,436 @@ import yaml
 import json
 
 with open('src/core/lib/debug/stats_data.yaml') as f:
-  attrs = yaml.load(f.read())
+    attrs = yaml.load(f.read())
 
 REQUIRED_FIELDS = ['name', 'doc']
 
+
 def make_type(name, fields):
-  return (collections.namedtuple(name, ' '.join(list(set(REQUIRED_FIELDS + fields)))), [])
+    return (collections.namedtuple(
+        name, ' '.join(list(set(REQUIRED_FIELDS + fields)))), [])
+
 
 def c_str(s, encoding='ascii'):
-   if isinstance(s, unicode):
-      s = s.encode(encoding)
-   result = ''
-   for c in s:
-      if not (32 <= ord(c) < 127) or c in ('\\', '"'):
-         result += '\\%03o' % ord(c)
-      else:
-         result += c
-   return '"' + result + '"'
-
-types = (
-  make_type('Counter', []),
-  make_type('Histogram', ['max', 'buckets']),
-)
+    if isinstance(s, unicode):
+        s = s.encode(encoding)
+    result = ''
+    for c in s:
+        if not (32 <= ord(c) < 127) or c in ('\\', '"'):
+            result += '\\%03o' % ord(c)
+        else:
+            result += c
+    return '"' + result + '"'
+
+
+types = (make_type('Counter', []), make_type('Histogram', ['max', 'buckets']),)
 
 inst_map = dict((t[0].__name__, t[1]) for t in types)
 
 stats = []
 
 for attr in attrs:
-  found = False
-  for t, lst in types:
-    t_name = t.__name__.lower()
-    if t_name in attr:
-      name = attr[t_name]
-      del attr[t_name]
-      lst.append(t(name=name, **attr))
-      found = True
-      break
-  assert found, "Bad decl: %s" % attr
+    found = False
+    for t, lst in types:
+        t_name = t.__name__.lower()
+        if t_name in attr:
+            name = attr[t_name]
+            del attr[t_name]
+            lst.append(t(name=name, **attr))
+            found = True
+            break
+    assert found, "Bad decl: %s" % attr
+
 
 def dbl2u64(d):
-  return ctypes.c_ulonglong.from_buffer(ctypes.c_double(d)).value
+    return ctypes.c_ulonglong.from_buffer(ctypes.c_double(d)).value
+
 
 def shift_works_until(mapped_bounds, shift_bits):
-  for i, ab in enumerate(zip(mapped_bounds, mapped_bounds[1:])):
-    a, b = ab
-    if (a >> shift_bits) == (b >> shift_bits):
-      return i
-  return len(mapped_bounds)
+    for i, ab in enumerate(zip(mapped_bounds, mapped_bounds[1:])):
+        a, b = ab
+        if (a >> shift_bits) == (b >> shift_bits):
+            return i
+    return len(mapped_bounds)
+
 
 def find_ideal_shift(mapped_bounds, max_size):
-  best = None
-  for shift_bits in reversed(range(0,64)):
-    n = shift_works_until(mapped_bounds, shift_bits)
-    if n == 0: continue
-    table_size = mapped_bounds[n-1] >> shift_bits
-    if table_size > max_size: continue
-    if table_size > 65535: continue
-    if best is None:
-      best = (shift_bits, n, table_size)
-    elif best[1] < n:
-      best = (shift_bits, n, table_size)
-  print best
-  return best
+    best = None
+    for shift_bits in reversed(range(0, 64)):
+        n = shift_works_until(mapped_bounds, shift_bits)
+        if n == 0: continue
+        table_size = mapped_bounds[n - 1] >> shift_bits
+        if table_size > max_size: continue
+        if table_size > 65535: continue
+        if best is None:
+            best = (shift_bits, n, table_size)
+        elif best[1] < n:
+            best = (shift_bits, n, table_size)
+    print best
+    return best
+
 
 def gen_map_table(mapped_bounds, shift_data):
-  tbl = []
-  cur = 0
-  print mapped_bounds
-  mapped_bounds = [x >> shift_data[0] for x in mapped_bounds]
-  print mapped_bounds
-  for i in range(0, mapped_bounds[shift_data[1]-1]):
-    while i > mapped_bounds[cur]:
-      cur += 1
-    tbl.append(cur)
-  return tbl
+    tbl = []
+    cur = 0
+    print mapped_bounds
+    mapped_bounds = [x >> shift_data[0] for x in mapped_bounds]
+    print mapped_bounds
+    for i in range(0, mapped_bounds[shift_data[1] - 1]):
+        while i > mapped_bounds[cur]:
+            cur += 1
+        tbl.append(cur)
+    return tbl
+
 
 static_tables = []
 
+
 def decl_static_table(values, type):
-  global static_tables
-  v = (type, values)
-  for i, vp in enumerate(static_tables):
-    if v == vp: return i
-  print "ADD TABLE: %s %r" % (type, values)
-  r = len(static_tables)
-  static_tables.append(v)
-  return r
+    global static_tables
+    v = (type, values)
+    for i, vp in enumerate(static_tables):
+        if v == vp: return i
+    print "ADD TABLE: %s %r" % (type, values)
+    r = len(static_tables)
+    static_tables.append(v)
+    return r
+
 
 def type_for_uint_table(table):
-  mv = max(table)
-  if mv < 2**8:
-    return 'uint8_t'
-  elif mv < 2**16:
-    return 'uint16_t'
-  elif mv < 2**32:
-    return 'uint32_t'
-  else:
-    return 'uint64_t'
+    mv = max(table)
+    if mv < 2**8:
+        return 'uint8_t'
+    elif mv < 2**16:
+        return 'uint16_t'
+    elif mv < 2**32:
+        return 'uint32_t'
+    else:
+        return 'uint64_t'
+
 
 def gen_bucket_code(histogram):
-  bounds = [0, 1]
-  done_trivial = False
-  done_unmapped = False
-  first_nontrivial = None
-  first_unmapped = None
-  while len(bounds) < histogram.buckets + 1:
-    if len(bounds) == histogram.buckets:
-      nextb = int(histogram.max)
+    bounds = [0, 1]
+    done_trivial = False
+    done_unmapped = False
+    first_nontrivial = None
+    first_unmapped = None
+    while len(bounds) < histogram.buckets + 1:
+        if len(bounds) == histogram.buckets:
+            nextb = int(histogram.max)
+        else:
+            mul = math.pow(
+                float(histogram.max) / bounds[-1],
+                1.0 / (histogram.buckets + 1 - len(bounds)))
+            nextb = int(math.ceil(bounds[-1] * mul))
+        if nextb <= bounds[-1] + 1:
+            nextb = bounds[-1] + 1
+        elif not done_trivial:
+            done_trivial = True
+            first_nontrivial = len(bounds)
+        bounds.append(nextb)
+    bounds_idx = decl_static_table(bounds, 'int')
+    if done_trivial:
+        first_nontrivial_code = dbl2u64(first_nontrivial)
+        code_bounds = [dbl2u64(x) - first_nontrivial_code for x in bounds]
+        shift_data = find_ideal_shift(code_bounds[first_nontrivial:],
+                                      256 * histogram.buckets)
+    #print first_nontrivial, shift_data, bounds
+    #if shift_data is not None: print [hex(x >> shift_data[0]) for x in code_bounds[first_nontrivial:]]
+    code = 'value = GPR_CLAMP(value, 0, %d);\n' % histogram.max
+    map_table = gen_map_table(code_bounds[first_nontrivial:], shift_data)
+    if first_nontrivial is None:
+        code += ('GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_%s, value);\n' %
+                 histogram.name.upper())
     else:
-      mul = math.pow(float(histogram.max) / bounds[-1],
-                     1.0 / (histogram.buckets + 1 - len(bounds)))
-      nextb = int(math.ceil(bounds[-1] * mul))
-    if nextb <= bounds[-1] + 1:
-      nextb = bounds[-1] + 1
-    elif not done_trivial:
-      done_trivial = True
-      first_nontrivial = len(bounds)
-    bounds.append(nextb)
-  bounds_idx = decl_static_table(bounds, 'int')
-  if done_trivial:
-    first_nontrivial_code = dbl2u64(first_nontrivial)
-    code_bounds = [dbl2u64(x) - first_nontrivial_code for x in bounds]
-    shift_data = find_ideal_shift(code_bounds[first_nontrivial:], 256 * histogram.buckets)
-  #print first_nontrivial, shift_data, bounds
-  #if shift_data is not None: print [hex(x >> shift_data[0]) for x in code_bounds[first_nontrivial:]]
-  code = 'value = GPR_CLAMP(value, 0, %d);\n' % histogram.max
-  map_table = gen_map_table(code_bounds[first_nontrivial:], shift_data)
-  if first_nontrivial is None:
-    code += ('GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_%s, value);\n'
-             % histogram.name.upper())
-  else:
-    code += 'if (value < %d) {\n' % first_nontrivial
-    code += ('GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_%s, value);\n'
-             % histogram.name.upper())
-    code += 'return;\n'
-    code += '}'
-    first_nontrivial_code = dbl2u64(first_nontrivial)
-    if shift_data is not None:
-      map_table_idx = decl_static_table(map_table, type_for_uint_table(map_table))
-      code += 'union { double dbl; uint64_t uint; } _val, _bkt;\n'
-      code += '_val.dbl = value;\n'
-      code += 'if (_val.uint < %dull) {\n' % ((map_table[-1] << shift_data[0]) + first_nontrivial_code)
-      code += 'int bucket = '
-      code += 'grpc_stats_table_%d[((_val.uint - %dull) >> %d)] + %d;\n' % (map_table_idx, first_nontrivial_code, shift_data[0], first_nontrivial)
-      code += '_bkt.dbl = grpc_stats_table_%d[bucket];\n' % bounds_idx
-      code += 'bucket -= (_val.uint < _bkt.uint);\n'
-      code += 'GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_%s, bucket);\n' % histogram.name.upper()
-      code += 'return;\n'
-      code += '}\n'
-    code += 'GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_%s, '% histogram.name.upper()
-    code += 'grpc_stats_histo_find_bucket_slow((exec_ctx), value, grpc_stats_table_%d, %d));\n' % (bounds_idx, histogram.buckets)
-  return (code, bounds_idx)
+        code += 'if (value < %d) {\n' % first_nontrivial
+        code += ('GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_%s, value);\n' %
+                 histogram.name.upper())
+        code += 'return;\n'
+        code += '}'
+        first_nontrivial_code = dbl2u64(first_nontrivial)
+        if shift_data is not None:
+            map_table_idx = decl_static_table(map_table,
+                                              type_for_uint_table(map_table))
+            code += 'union { double dbl; uint64_t uint; } _val, _bkt;\n'
+            code += '_val.dbl = value;\n'
+            code += 'if (_val.uint < %dull) {\n' % (
+                (map_table[-1] << shift_data[0]) + first_nontrivial_code)
+            code += 'int bucket = '
+            code += 'grpc_stats_table_%d[((_val.uint - %dull) >> %d)] + %d;\n' % (
+                map_table_idx, first_nontrivial_code, shift_data[0],
+                first_nontrivial)
+            code += '_bkt.dbl = grpc_stats_table_%d[bucket];\n' % bounds_idx
+            code += 'bucket -= (_val.uint < _bkt.uint);\n'
+            code += 'GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_%s, bucket);\n' % histogram.name.upper(
+            )
+            code += 'return;\n'
+            code += '}\n'
+        code += 'GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_%s, ' % histogram.name.upper(
+        )
+        code += 'grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_%d, %d));\n' % (
+            bounds_idx, histogram.buckets)
+    return (code, bounds_idx)
+
 
 # utility: print a big comment block into a set of files
 def put_banner(files, banner):
-  for f in files:
-    print >>f, '/*'
-    for line in banner:
-      print >>f, ' * %s' % line
-    print >>f, ' */'
-    print >>f
+    for f in files:
+        print >> f, '/*'
+        for line in banner:
+            print >> f, ' * %s' % line
+        print >> f, ' */'
+        print >> f
+
 
 with open('src/core/lib/debug/stats_data.h', 'w') as H:
-  # copy-paste copyright notice from this file
-  with open(sys.argv[0]) as my_source:
-    copyright = []
-    for line in my_source:
-      if line[0] != '#': break
-    for line in my_source:
-      if line[0] == '#':
-        copyright.append(line)
-        break
-    for line in my_source:
-      if line[0] != '#':
-        break
-      copyright.append(line)
-    put_banner([H], [line[2:].rstrip() for line in copyright])
-
-  put_banner([H], ["Automatically generated by tools/codegen/core/gen_stats_data.py"])
-
-  print >>H, "#ifndef GRPC_CORE_LIB_DEBUG_STATS_DATA_H"
-  print >>H, "#define GRPC_CORE_LIB_DEBUG_STATS_DATA_H"
-  print >>H
-  print >>H, "#include <inttypes.h>"
-  print >>H, "#include \"src/core/lib/iomgr/exec_ctx.h\""
-  print >>H
-  print >>H, "#ifdef __cplusplus"
-  print >>H, "extern \"C\" {"
-  print >>H, "#endif"
-  print >>H
-
-  for typename, instances in sorted(inst_map.items()):
-    print >>H, "typedef enum {"
-    for inst in instances:
-      print >>H, "  GRPC_STATS_%s_%s," % (typename.upper(), inst.name.upper())
-    print >>H, "  GRPC_STATS_%s_COUNT" % (typename.upper())
-    print >>H, "} grpc_stats_%ss;" % (typename.lower())
-    print >>H, "extern const char *grpc_stats_%s_name[GRPC_STATS_%s_COUNT];" % (
-        typename.lower(), typename.upper())
-    print >>H, "extern const char *grpc_stats_%s_doc[GRPC_STATS_%s_COUNT];" % (
-        typename.lower(), typename.upper())
-
-  histo_start = []
-  histo_buckets = []
-  histo_bucket_boundaries = []
-
-  print >>H, "typedef enum {"
-  first_slot = 0
-  for histogram in inst_map['Histogram']:
-    histo_start.append(first_slot)
-    histo_buckets.append(histogram.buckets)
-    print >>H, "  GRPC_STATS_HISTOGRAM_%s_FIRST_SLOT = %d," % (histogram.name.upper(), first_slot)
-    print >>H, "  GRPC_STATS_HISTOGRAM_%s_BUCKETS = %d," % (histogram.name.upper(), histogram.buckets)
-    first_slot += histogram.buckets
-  print >>H, "  GRPC_STATS_HISTOGRAM_BUCKETS = %d" % first_slot
-  print >>H, "} grpc_stats_histogram_constants;"
-
-  for ctr in inst_map['Counter']:
-    print >>H, ("#define GRPC_STATS_INC_%s(exec_ctx) " +
-                "GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_%s)") % (
-                ctr.name.upper(), ctr.name.upper())
-  for histogram in inst_map['Histogram']:
-    print >>H, "#define GRPC_STATS_INC_%s(exec_ctx, value) grpc_stats_inc_%s((exec_ctx), (int)(value))" % (
-        histogram.name.upper(), histogram.name.lower())
-    print >>H, "void grpc_stats_inc_%s(grpc_exec_ctx *exec_ctx, int x);" % histogram.name.lower()
-
-  for i, tbl in enumerate(static_tables):
-    print >>H, "extern const %s grpc_stats_table_%d[%d];" % (tbl[0], i, len(tbl[1]))
-
-  print >>H, "extern const int grpc_stats_histo_buckets[%d];" % len(inst_map['Histogram'])
-  print >>H, "extern const int grpc_stats_histo_start[%d];" % len(inst_map['Histogram'])
-  print >>H, "extern const int *const grpc_stats_histo_bucket_boundaries[%d];" % len(inst_map['Histogram'])
-  print >>H, "extern void (*const grpc_stats_inc_histogram[%d])(grpc_exec_ctx *exec_ctx, int x);" % len(inst_map['Histogram'])
-
-  print >>H
-  print >>H, "#ifdef __cplusplus"
-  print >>H, "}"
-  print >>H, "#endif"
-  print >>H
-  print >>H, "#endif /* GRPC_CORE_LIB_DEBUG_STATS_DATA_H */"
+    # copy-paste copyright notice from this file
+    with open(sys.argv[0]) as my_source:
+        copyright = []
+        for line in my_source:
+            if line[0] != '#': break
+        for line in my_source:
+            if line[0] == '#':
+                copyright.append(line)
+                break
+        for line in my_source:
+            if line[0] != '#':
+                break
+            copyright.append(line)
+        put_banner([H], [line[2:].rstrip() for line in copyright])
+
+    put_banner(
+        [H],
+        ["Automatically generated by tools/codegen/core/gen_stats_data.py"])
+
+    print >> H, "#ifndef GRPC_CORE_LIB_DEBUG_STATS_DATA_H"
+    print >> H, "#define GRPC_CORE_LIB_DEBUG_STATS_DATA_H"
+    print >> H
+    print >> H, "#include <inttypes.h>"
+    print >> H, "#include \"src/core/lib/iomgr/exec_ctx.h\""
+    print >> H
+    print >> H, "#ifdef __cplusplus"
+    print >> H, "extern \"C\" {"
+    print >> H, "#endif"
+    print >> H
+
+    for typename, instances in sorted(inst_map.items()):
+        print >> H, "typedef enum {"
+        for inst in instances:
+            print >> H, "  GRPC_STATS_%s_%s," % (typename.upper(),
+                                                 inst.name.upper())
+        print >> H, "  GRPC_STATS_%s_COUNT" % (typename.upper())
+        print >> H, "} grpc_stats_%ss;" % (typename.lower())
+        print >> H, "extern const char *grpc_stats_%s_name[GRPC_STATS_%s_COUNT];" % (
+            typename.lower(), typename.upper())
+        print >> H, "extern const char *grpc_stats_%s_doc[GRPC_STATS_%s_COUNT];" % (
+            typename.lower(), typename.upper())
+
+    histo_start = []
+    histo_buckets = []
+    histo_bucket_boundaries = []
+
+    print >> H, "typedef enum {"
+    first_slot = 0
+    for histogram in inst_map['Histogram']:
+        histo_start.append(first_slot)
+        histo_buckets.append(histogram.buckets)
+        print >> H, "  GRPC_STATS_HISTOGRAM_%s_FIRST_SLOT = %d," % (
+            histogram.name.upper(), first_slot)
+        print >> H, "  GRPC_STATS_HISTOGRAM_%s_BUCKETS = %d," % (
+            histogram.name.upper(), histogram.buckets)
+        first_slot += histogram.buckets
+    print >> H, "  GRPC_STATS_HISTOGRAM_BUCKETS = %d" % first_slot
+    print >> H, "} grpc_stats_histogram_constants;"
+
+    for ctr in inst_map['Counter']:
+        print >> H, ("#define GRPC_STATS_INC_%s() " +
+                     "GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_%s)") % (
+                         ctr.name.upper(), ctr.name.upper())
+    for histogram in inst_map['Histogram']:
+        print >> H, "#define GRPC_STATS_INC_%s(value) grpc_stats_inc_%s( (int)(value))" % (
+            histogram.name.upper(), histogram.name.lower())
+        print >> H, "void grpc_stats_inc_%s(int x);" % histogram.name.lower()
+
+    for i, tbl in enumerate(static_tables):
+        print >> H, "extern const %s grpc_stats_table_%d[%d];" % (tbl[0], i,
+                                                                  len(tbl[1]))
+
+    print >> H, "extern const int grpc_stats_histo_buckets[%d];" % len(
+        inst_map['Histogram'])
+    print >> H, "extern const int grpc_stats_histo_start[%d];" % len(
+        inst_map['Histogram'])
+    print >> H, "extern const int *const grpc_stats_histo_bucket_boundaries[%d];" % len(
+        inst_map['Histogram'])
+    print >> H, "extern void (*const grpc_stats_inc_histogram[%d])(int x);" % len(
+        inst_map['Histogram'])
+
+    print >> H
+    print >> H, "#ifdef __cplusplus"
+    print >> H, "}"
+    print >> H, "#endif"
+    print >> H
+    print >> H, "#endif /* GRPC_CORE_LIB_DEBUG_STATS_DATA_H */"
 
 with open('src/core/lib/debug/stats_data.cc', 'w') as C:
-  # copy-paste copyright notice from this file
-  with open(sys.argv[0]) as my_source:
-    copyright = []
-    for line in my_source:
-      if line[0] != '#': break
-    for line in my_source:
-      if line[0] == '#':
-        copyright.append(line)
-        break
-    for line in my_source:
-      if line[0] != '#':
-        break
-      copyright.append(line)
-    put_banner([C], [line[2:].rstrip() for line in copyright])
-
-  put_banner([C], ["Automatically generated by tools/codegen/core/gen_stats_data.py"])
-
-  print >>C, "#include \"src/core/lib/debug/stats_data.h\""
-  print >>C, "#include \"src/core/lib/debug/stats.h\""
-  print >>C, "#include \"src/core/lib/iomgr/exec_ctx.h\""
-  print >>C, "#include <grpc/support/useful.h>"
-
-  histo_code = []
-  for histogram in inst_map['Histogram']:
-    code, bounds_idx = gen_bucket_code(histogram)
-    histo_bucket_boundaries.append(bounds_idx)
-    histo_code.append(code)
-
-  for typename, instances in sorted(inst_map.items()):
-    print >>C, "const char *grpc_stats_%s_name[GRPC_STATS_%s_COUNT] = {" % (
-        typename.lower(), typename.upper())
-    for inst in instances:
-      print >>C, "  %s," % c_str(inst.name)
-    print >>C, "};"
-    print >>C, "const char *grpc_stats_%s_doc[GRPC_STATS_%s_COUNT] = {" % (
-        typename.lower(), typename.upper())
-    for inst in instances:
-      print >>C, "  %s," % c_str(inst.doc)
-    print >>C, "};"
-
-  for i, tbl in enumerate(static_tables):
-    print >>C, "const %s grpc_stats_table_%d[%d] = {%s};" % (
-        tbl[0], i, len(tbl[1]), ','.join('%s' % x for x in tbl[1]))
-
-  for histogram, code in zip(inst_map['Histogram'], histo_code):
-    print >>C, ("void grpc_stats_inc_%s(grpc_exec_ctx *exec_ctx, int value) {%s}") % (
-                histogram.name.lower(),
-                code)
-
-  print >>C, "const int grpc_stats_histo_buckets[%d] = {%s};" % (
-      len(inst_map['Histogram']), ','.join('%s' % x for x in histo_buckets))
-  print >>C, "const int grpc_stats_histo_start[%d] = {%s};" % (
-      len(inst_map['Histogram']), ','.join('%s' % x for x in histo_start))
-  print >>C, "const int *const grpc_stats_histo_bucket_boundaries[%d] = {%s};" % (
-      len(inst_map['Histogram']), ','.join('grpc_stats_table_%d' % x for x in histo_bucket_boundaries))
-  print >>C, "void (*const grpc_stats_inc_histogram[%d])(grpc_exec_ctx *exec_ctx, int x) = {%s};" % (
-      len(inst_map['Histogram']), ','.join('grpc_stats_inc_%s' % histogram.name.lower() for histogram in inst_map['Histogram']))
+    # copy-paste copyright notice from this file
+    with open(sys.argv[0]) as my_source:
+        copyright = []
+        for line in my_source:
+            if line[0] != '#': break
+        for line in my_source:
+            if line[0] == '#':
+                copyright.append(line)
+                break
+        for line in my_source:
+            if line[0] != '#':
+                break
+            copyright.append(line)
+        put_banner([C], [line[2:].rstrip() for line in copyright])
+
+    put_banner(
+        [C],
+        ["Automatically generated by tools/codegen/core/gen_stats_data.py"])
+
+    print >> C, "#include \"src/core/lib/debug/stats_data.h\""
+    print >> C, "#include \"src/core/lib/debug/stats.h\""
+    print >> C, "#include \"src/core/lib/iomgr/exec_ctx.h\""
+    print >> C, "#include <grpc/support/useful.h>"
+
+    histo_code = []
+    for histogram in inst_map['Histogram']:
+        code, bounds_idx = gen_bucket_code(histogram)
+        histo_bucket_boundaries.append(bounds_idx)
+        histo_code.append(code)
+
+    for typename, instances in sorted(inst_map.items()):
+        print >> C, "const char *grpc_stats_%s_name[GRPC_STATS_%s_COUNT] = {" % (
+            typename.lower(), typename.upper())
+        for inst in instances:
+            print >> C, "  %s," % c_str(inst.name)
+        print >> C, "};"
+        print >> C, "const char *grpc_stats_%s_doc[GRPC_STATS_%s_COUNT] = {" % (
+            typename.lower(), typename.upper())
+        for inst in instances:
+            print >> C, "  %s," % c_str(inst.doc)
+        print >> C, "};"
+
+    for i, tbl in enumerate(static_tables):
+        print >> C, "const %s grpc_stats_table_%d[%d] = {%s};" % (
+            tbl[0], i, len(tbl[1]), ','.join('%s' % x for x in tbl[1]))
+
+    for histogram, code in zip(inst_map['Histogram'], histo_code):
+        print >> C, ("void grpc_stats_inc_%s(int value) {%s}") % (
+            histogram.name.lower(), code)
+
+    print >> C, "const int grpc_stats_histo_buckets[%d] = {%s};" % (
+        len(inst_map['Histogram']), ','.join('%s' % x for x in histo_buckets))
+    print >> C, "const int grpc_stats_histo_start[%d] = {%s};" % (
+        len(inst_map['Histogram']), ','.join('%s' % x for x in histo_start))
+    print >> C, "const int *const grpc_stats_histo_bucket_boundaries[%d] = {%s};" % (
+        len(inst_map['Histogram']), ','.join('grpc_stats_table_%d' % x
+                                             for x in histo_bucket_boundaries))
+    print >> C, "void (*const grpc_stats_inc_histogram[%d])(int x) = {%s};" % (
+        len(inst_map['Histogram']), ','.join(
+            'grpc_stats_inc_%s' % histogram.name.lower()
+            for histogram in inst_map['Histogram']))
 
 # patch qps_test bigquery schema
 RECORD_EXPLICIT_PERCENTILES = [50, 95, 99]
 
 with open('tools/run_tests/performance/scenario_result_schema.json', 'r') as f:
-  qps_schema = json.loads(f.read())
+    qps_schema = json.loads(f.read())
+
 
 def FindNamed(js, name):
-  for el in js:
-    if el['name'] == name:
-      return el
+    for el in js:
+        if el['name'] == name:
+            return el
+
 
 def RemoveCoreFields(js):
-  new_fields = []
-  for field in js['fields']:
-    if not field['name'].startswith('core_'):
-      new_fields.append(field)
-  js['fields'] = new_fields
+    new_fields = []
+    for field in js['fields']:
+        if not field['name'].startswith('core_'):
+            new_fields.append(field)
+    js['fields'] = new_fields
+
 
 RemoveCoreFields(FindNamed(qps_schema, 'clientStats'))
 RemoveCoreFields(FindNamed(qps_schema, 'serverStats'))
 
+
 def AddCoreFields(js):
-  for counter in inst_map['Counter']:
-    js['fields'].append({
-      'name': 'core_%s' % counter.name,
-      'type': 'INTEGER',
-      'mode': 'NULLABLE'
-    })
-  for histogram in inst_map['Histogram']:
-    js['fields'].append({
-      'name': 'core_%s' % histogram.name,
-      'type': 'STRING',
-      'mode': 'NULLABLE'
-    })
-    js['fields'].append({
-      'name': 'core_%s_bkts' % histogram.name,
-      'type': 'STRING',
-      'mode': 'NULLABLE'
-    })
-    for pctl in RECORD_EXPLICIT_PERCENTILES:
-      js['fields'].append({
-        'name': 'core_%s_%dp' % (histogram.name, pctl),
-        'type': 'FLOAT',
-        'mode': 'NULLABLE'
-      })
+    for counter in inst_map['Counter']:
+        js['fields'].append({
+            'name': 'core_%s' % counter.name,
+            'type': 'INTEGER',
+            'mode': 'NULLABLE'
+        })
+    for histogram in inst_map['Histogram']:
+        js['fields'].append({
+            'name': 'core_%s' % histogram.name,
+            'type': 'STRING',
+            'mode': 'NULLABLE'
+        })
+        js['fields'].append({
+            'name': 'core_%s_bkts' % histogram.name,
+            'type': 'STRING',
+            'mode': 'NULLABLE'
+        })
+        for pctl in RECORD_EXPLICIT_PERCENTILES:
+            js['fields'].append({
+                'name': 'core_%s_%dp' % (histogram.name, pctl),
+                'type': 'FLOAT',
+                'mode': 'NULLABLE'
+            })
+
 
 AddCoreFields(FindNamed(qps_schema, 'clientStats'))
 AddCoreFields(FindNamed(qps_schema, 'serverStats'))
 
 with open('tools/run_tests/performance/scenario_result_schema.json', 'w') as f:
-  f.write(json.dumps(qps_schema, indent=2, sort_keys=True))
+    f.write(json.dumps(qps_schema, indent=2, sort_keys=True))
 
 # and generate a helper script to massage scenario results into the format we'd
 # like to query
 with open('tools/run_tests/performance/massage_qps_stats.py', 'w') as P:
-  with open(sys.argv[0]) as my_source:
-    for line in my_source:
-      if line[0] != '#': break
-    for line in my_source:
-      if line[0] == '#':
-        print >>P, line.rstrip()
-        break
-    for line in my_source:
-      if line[0] != '#':
-        break
-      print >>P, line.rstrip()
-
-  print >>P
-  print >>P, '# Autogenerated by tools/codegen/core/gen_stats_data.py'
-  print >>P
-
-  print >>P, 'import massage_qps_stats_helpers'
-
-  print >>P, 'def massage_qps_stats(scenario_result):'
-  print >>P, '  for stats in scenario_result["serverStats"] + scenario_result["clientStats"]:'
-  print >>P, '    if "coreStats" not in stats: return'
-  print >>P, '    core_stats = stats["coreStats"]'
-  print >>P, '    del stats["coreStats"]'
-  for counter in inst_map['Counter']:
-    print >>P, '    stats["core_%s"] = massage_qps_stats_helpers.counter(core_stats, "%s")' % (counter.name, counter.name)
-  for i, histogram in enumerate(inst_map['Histogram']):
-    print >>P, '    h = massage_qps_stats_helpers.histogram(core_stats, "%s")' % histogram.name
-    print >>P, '    stats["core_%s"] = ",".join("%%f" %% x for x in h.buckets)' % histogram.name
-    print >>P, '    stats["core_%s_bkts"] = ",".join("%%f" %% x for x in h.boundaries)' % histogram.name
-    for pctl in RECORD_EXPLICIT_PERCENTILES:
-      print >>P, '    stats["core_%s_%dp"] = massage_qps_stats_helpers.percentile(h.buckets, %d, h.boundaries)' % (
-          histogram.name, pctl, pctl)
+    with open(sys.argv[0]) as my_source:
+        for line in my_source:
+            if line[0] != '#': break
+        for line in my_source:
+            if line[0] == '#':
+                print >> P, line.rstrip()
+                break
+        for line in my_source:
+            if line[0] != '#':
+                break
+            print >> P, line.rstrip()
+
+    print >> P
+    print >> P, '# Autogenerated by tools/codegen/core/gen_stats_data.py'
+    print >> P
+
+    print >> P, 'import massage_qps_stats_helpers'
+
+    print >> P, 'def massage_qps_stats(scenario_result):'
+    print >> P, '  for stats in scenario_result["serverStats"] + scenario_result["clientStats"]:'
+    print >> P, '    if "coreStats" not in stats: return'
+    print >> P, '    core_stats = stats["coreStats"]'
+    print >> P, '    del stats["coreStats"]'
+    for counter in inst_map['Counter']:
+        print >> P, '    stats["core_%s"] = massage_qps_stats_helpers.counter(core_stats, "%s")' % (
+            counter.name, counter.name)
+    for i, histogram in enumerate(inst_map['Histogram']):
+        print >> P, '    h = massage_qps_stats_helpers.histogram(core_stats, "%s")' % histogram.name
+        print >> P, '    stats["core_%s"] = ",".join("%%f" %% x for x in h.buckets)' % histogram.name
+        print >> P, '    stats["core_%s_bkts"] = ",".join("%%f" %% x for x in h.boundaries)' % histogram.name
+        for pctl in RECORD_EXPLICIT_PERCENTILES:
+            print >> P, '    stats["core_%s_%dp"] = massage_qps_stats_helpers.percentile(h.buckets, %d, h.boundaries)' % (
+                histogram.name, pctl, pctl)
 
 with open('src/core/lib/debug/stats_data_bq_schema.sql', 'w') as S:
-  columns = []
-  for counter in inst_map['Counter']:
-    columns.append(('%s_per_iteration' % counter.name, 'FLOAT'))
-  print >>S, ',\n'.join('%s:%s' % x for x in columns)
-
+    columns = []
+    for counter in inst_map['Counter']:
+        columns.append(('%s_per_iteration' % counter.name, 'FLOAT'))
+    print >> S, ',\n'.join('%s:%s' % x for x in columns)
diff --git a/tools/debug/core/chttp2_ref_leak.py b/tools/debug/core/chttp2_ref_leak.py
index d693dd9e54..a6a5448775 100755
--- a/tools/debug/core/chttp2_ref_leak.py
+++ b/tools/debug/core/chttp2_ref_leak.py
@@ -20,8 +20,10 @@ import collections
 import sys
 import re
 
+
 def new_obj():
-  return ['destroy']
+    return ['destroy']
+
 
 outstanding = collections.defaultdict(new_obj)
 
@@ -29,14 +31,14 @@ outstanding = collections.defaultdict(new_obj)
 # chttp2:unref:0x629000005200 2->1 destroy [src/core/ext/transport/chttp2/transport/chttp2_transport.c:599]
 
 for line in sys.stdin:
-  m = re.search(r'chttp2:(  ref|unref):0x([a-fA-F0-9]+) [^ ]+ ([^[]+) \[(.*)\]', line)
-  if m:
-    if m.group(1) == '  ref':
-      outstanding[m.group(2)].append(m.group(3))
-    else:
-      outstanding[m.group(2)].remove(m.group(3))
+    m = re.search(
+        r'chttp2:(  ref|unref):0x([a-fA-F0-9]+) [^ ]+ ([^[]+) \[(.*)\]', line)
+    if m:
+        if m.group(1) == '  ref':
+            outstanding[m.group(2)].append(m.group(3))
+        else:
+            outstanding[m.group(2)].remove(m.group(3))
 
 for obj, remaining in outstanding.items():
-  if remaining:
-    print 'LEAKED: %s %r' % (obj, remaining)
-
+    if remaining:
+        print 'LEAKED: %s %r' % (obj, remaining)
diff --git a/tools/debug/core/error_ref_leak.py b/tools/debug/core/error_ref_leak.py
index 6582328a5b..7806338683 100644
--- a/tools/debug/core/error_ref_leak.py
+++ b/tools/debug/core/error_ref_leak.py
@@ -26,22 +26,22 @@ data = sys.stdin.readlines()
 
 errs = []
 for line in data:
-  # if we care about the line
-  if re.search(r'error.cc', line):
-    # str manip to cut off left part of log line
-    line = line.partition('error.cc:')[-1]
-    line = re.sub(r'\d+] ', r'', line)
-    line = line.strip().split()
-    err = line[0].strip(":")
-    if line[1] == "create":
-      assert(err not in errs)
-      errs.append(err)
-    elif line[0] == "realloc":
-      errs.remove(line[1])
-      errs.append(line[3])
-    # explicitly look for the last dereference 
-    elif line[1] == "1" and line[3] == "0":
-      assert(err in errs)
-      errs.remove(err)
+    # if we care about the line
+    if re.search(r'error.cc', line):
+        # str manip to cut off left part of log line
+        line = line.partition('error.cc:')[-1]
+        line = re.sub(r'\d+] ', r'', line)
+        line = line.strip().split()
+        err = line[0].strip(":")
+        if line[1] == "create":
+            assert (err not in errs)
+            errs.append(err)
+        elif line[0] == "realloc":
+            errs.remove(line[1])
+            errs.append(line[3])
+        # explicitly look for the last dereference 
+        elif line[1] == "1" and line[3] == "0":
+            assert (err in errs)
+            errs.remove(err)
 
 print "leaked:", errs
diff --git a/tools/distrib/c-ish/check_documentation.py b/tools/distrib/c-ish/check_documentation.py
index 24da0051ad..fef8f4ee5d 100755
--- a/tools/distrib/c-ish/check_documentation.py
+++ b/tools/distrib/c-ish/check_documentation.py
@@ -22,24 +22,15 @@ import sys
 
 # where do we run
 _TARGET_DIRS = [
-  'include/grpc',
-  'include/grpc++',
-  'src/core',
-  'src/cpp',
-  'test/core',
-  'test/cpp'
+    'include/grpc', 'include/grpc++', 'src/core', 'src/cpp', 'test/core',
+    'test/cpp'
 ]
 
 # which file extensions do we care about
-_INTERESTING_EXTENSIONS = [
-  '.c',
-  '.h',
-  '.cc'
-]
+_INTERESTING_EXTENSIONS = ['.c', '.h', '.cc']
 
 # find our home
-_ROOT = os.path.abspath(
-    os.path.join(os.path.dirname(sys.argv[0]), '../../..'))
+_ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../../..'))
 os.chdir(_ROOT)
 
 errors = 0
@@ -47,30 +38,30 @@ errors = 0
 # walk directories, find things
 printed_banner = False
 for target_dir in _TARGET_DIRS:
-  for root, dirs, filenames in os.walk(target_dir):
-    if 'README.md' not in filenames:
-      if not printed_banner:
-        print 'Missing README.md'
-        print '================='
-        printed_banner = True
-      print root
-      errors += 1
+    for root, dirs, filenames in os.walk(target_dir):
+        if 'README.md' not in filenames:
+            if not printed_banner:
+                print 'Missing README.md'
+                print '================='
+                printed_banner = True
+            print root
+            errors += 1
 if printed_banner: print
 printed_banner = False
 for target_dir in _TARGET_DIRS:
-  for root, dirs, filenames in os.walk(target_dir):
-    for filename in filenames:
-      if os.path.splitext(filename)[1] not in _INTERESTING_EXTENSIONS:
-        continue
-      path = os.path.join(root, filename)
-      with open(path) as f:
-        contents = f.read()
-      if '\\file' not in contents:
-        if not printed_banner:
-          print 'Missing \\file comment'
-          print '======================'
-          printed_banner = True
-        print path
-        errors += 1
+    for root, dirs, filenames in os.walk(target_dir):
+        for filename in filenames:
+            if os.path.splitext(filename)[1] not in _INTERESTING_EXTENSIONS:
+                continue
+            path = os.path.join(root, filename)
+            with open(path) as f:
+                contents = f.read()
+            if '\\file' not in contents:
+                if not printed_banner:
+                    print 'Missing \\file comment'
+                    print '======================'
+                    printed_banner = True
+                print path
+                errors += 1
 
 assert errors == 0, 'error count = %d' % errors
diff --git a/tools/distrib/check_copyright.py b/tools/distrib/check_copyright.py
index 6ecacede71..f6e73624a7 100755
--- a/tools/distrib/check_copyright.py
+++ b/tools/distrib/check_copyright.py
@@ -22,149 +22,135 @@ import sys
 import subprocess
 
 # find our home
-ROOT = os.path.abspath(
-    os.path.join(os.path.dirname(sys.argv[0]), '../..'))
+ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
 os.chdir(ROOT)
 
 # parse command line
 argp = argparse.ArgumentParser(description='copyright checker')
-argp.add_argument('-o', '--output',
-                  default='details',
-                  choices=['list', 'details'])
-argp.add_argument('-s', '--skips',
-                  default=0,
-                  action='store_const',
-                  const=1)
-argp.add_argument('-a', '--ancient',
-                  default=0,
-                  action='store_const',
-                  const=1)
-argp.add_argument('--precommit',
-                  default=False,
-                  action='store_true')
+argp.add_argument(
+    '-o', '--output', default='details', choices=['list', 'details'])
+argp.add_argument('-s', '--skips', default=0, action='store_const', const=1)
+argp.add_argument('-a', '--ancient', default=0, action='store_const', const=1)
+argp.add_argument('--precommit', default=False, action='store_true')
 args = argp.parse_args()
 
 # open the license text
 with open('NOTICE.txt') as f:
-  LICENSE_NOTICE = f.read().splitlines()
-
+    LICENSE_NOTICE = f.read().splitlines()
 
 # license format by file extension
 # key is the file extension, value is a format string
 # that given a line of license text, returns what should
 # be in the file
 LICENSE_PREFIX = {
-  '.bat':       r'@rem\s*',
-  '.c':         r'\s*(?://|\*)\s*',
-  '.cc':        r'\s*(?://|\*)\s*',
-  '.h':         r'\s*(?://|\*)\s*',
-  '.m':         r'\s*\*\s*',
-  '.php':       r'\s*\*\s*',
-  '.js':        r'\s*\*\s*',
-  '.py':        r'#\s*',
-  '.pyx':       r'#\s*',
-  '.pxd':       r'#\s*',
-  '.pxi':       r'#\s*',
-  '.rb':        r'#\s*',
-  '.sh':        r'#\s*',
-  '.proto':     r'//\s*',
-  '.cs':        r'//\s*',
-  '.mak':       r'#\s*',
-  'Makefile':   r'#\s*',
-  'Dockerfile': r'#\s*',
-  'BUILD':      r'#\s*',
+    '.bat': r'@rem\s*',
+    '.c': r'\s*(?://|\*)\s*',
+    '.cc': r'\s*(?://|\*)\s*',
+    '.h': r'\s*(?://|\*)\s*',
+    '.m': r'\s*\*\s*',
+    '.php': r'\s*\*\s*',
+    '.js': r'\s*\*\s*',
+    '.py': r'#\s*',
+    '.pyx': r'#\s*',
+    '.pxd': r'#\s*',
+    '.pxi': r'#\s*',
+    '.rb': r'#\s*',
+    '.sh': r'#\s*',
+    '.proto': r'//\s*',
+    '.cs': r'//\s*',
+    '.mak': r'#\s*',
+    'Makefile': r'#\s*',
+    'Dockerfile': r'#\s*',
+    'BUILD': r'#\s*',
 }
 
 _EXEMPT = frozenset((
-  # Generated protocol compiler output.
-  'examples/python/helloworld/helloworld_pb2.py',
-  'examples/python/helloworld/helloworld_pb2_grpc.py',
-  'examples/python/multiplex/helloworld_pb2.py',
-  'examples/python/multiplex/helloworld_pb2_grpc.py',
-  'examples/python/multiplex/route_guide_pb2.py',
-  'examples/python/multiplex/route_guide_pb2_grpc.py',
-  'examples/python/route_guide/route_guide_pb2.py',
-  'examples/python/route_guide/route_guide_pb2_grpc.py',
-
-  'src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h',
-  'src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c',
-  'src/cpp/server/health/health.pb.h',
-  'src/cpp/server/health/health.pb.c',
-
-  # An older file originally from outside gRPC.
-  'src/php/tests/bootstrap.php',
-  # census.proto copied from github
-  'tools/grpcz/census.proto',
-  # status.proto copied from googleapis
-  'src/proto/grpc/status/status.proto',
-))
-
+    # Generated protocol compiler output.
+    'examples/python/helloworld/helloworld_pb2.py',
+    'examples/python/helloworld/helloworld_pb2_grpc.py',
+    'examples/python/multiplex/helloworld_pb2.py',
+    'examples/python/multiplex/helloworld_pb2_grpc.py',
+    'examples/python/multiplex/route_guide_pb2.py',
+    'examples/python/multiplex/route_guide_pb2_grpc.py',
+    'examples/python/route_guide/route_guide_pb2.py',
+    'examples/python/route_guide/route_guide_pb2_grpc.py',
+    'src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h',
+    'src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c',
+    'src/cpp/server/health/health.pb.h',
+    'src/cpp/server/health/health.pb.c',
+
+    # An older file originally from outside gRPC.
+    'src/php/tests/bootstrap.php',
+    # census.proto copied from github
+    'tools/grpcz/census.proto',
+    # status.proto copied from googleapis
+    'src/proto/grpc/status/status.proto',))
 
 RE_YEAR = r'Copyright (?P<first_year>[0-9]+\-)?(?P<last_year>[0-9]+) gRPC authors.'
-RE_LICENSE = dict(
-    (k, r'\n'.join(
-        LICENSE_PREFIX[k] +
-        (RE_YEAR if re.search(RE_YEAR, line) else re.escape(line))
-        for line in LICENSE_NOTICE))
-     for k, v in LICENSE_PREFIX.iteritems())
+RE_LICENSE = dict((k, r'\n'.join(
+    LICENSE_PREFIX[k] + (RE_YEAR
+                         if re.search(RE_YEAR, line) else re.escape(line))
+    for line in LICENSE_NOTICE)) for k, v in LICENSE_PREFIX.iteritems())
 
 if args.precommit:
-  FILE_LIST_COMMAND = 'git status -z | grep -Poz \'(?<=^[MARC][MARCD ] )[^\s]+\''
+    FILE_LIST_COMMAND = 'git status -z | grep -Poz \'(?<=^[MARC][MARCD ] )[^\s]+\''
 else:
-  FILE_LIST_COMMAND = 'git ls-tree -r --name-only -r HEAD | ' \
-                      'grep -v ^third_party/ |' \
-                      'grep -v "\(ares_config.h\|ares_build.h\)"'
+    FILE_LIST_COMMAND = 'git ls-tree -r --name-only -r HEAD | ' \
+                        'grep -v ^third_party/ |' \
+                        'grep -v "\(ares_config.h\|ares_build.h\)"'
+
 
 def load(name):
-  with open(name) as f:
-    return f.read()
+    with open(name) as f:
+        return f.read()
+
 
 def save(name, text):
-  with open(name, 'w') as f:
-    f.write(text)
+    with open(name, 'w') as f:
+        f.write(text)
 
 
-assert(re.search(RE_LICENSE['Makefile'], load('Makefile')))
+assert (re.search(RE_LICENSE['Makefile'], load('Makefile')))
 
 
 def log(cond, why, filename):
-  if not cond: return
-  if args.output == 'details':
-    print '%s: %s' % (why, filename)
-  else:
-    print filename
+    if not cond: return
+    if args.output == 'details':
+        print '%s: %s' % (why, filename)
+    else:
+        print filename
 
 
 # scan files, validate the text
 ok = True
 filename_list = []
 try:
-  filename_list = subprocess.check_output(FILE_LIST_COMMAND,
-                                          shell=True).splitlines()
+    filename_list = subprocess.check_output(
+        FILE_LIST_COMMAND, shell=True).splitlines()
 except subprocess.CalledProcessError:
-  sys.exit(0)
+    sys.exit(0)
 
 for filename in filename_list:
-  if filename in _EXEMPT:
-    continue
-  ext = os.path.splitext(filename)[1]
-  base = os.path.basename(filename)
-  if ext in RE_LICENSE:
-    re_license = RE_LICENSE[ext]
-  elif base in RE_LICENSE:
-    re_license = RE_LICENSE[base]
-  else:
-    log(args.skips, 'skip', filename)
-    continue
-  try:
-    text = load(filename)
-  except:
-    continue
-  m = re.search(re_license, text)
-  if m:
-    pass
-  elif 'DO NOT EDIT' not in text and filename != 'src/boringssl/err_data.c':
-    log(1, 'copyright missing', filename)
-    ok = False
+    if filename in _EXEMPT:
+        continue
+    ext = os.path.splitext(filename)[1]
+    base = os.path.basename(filename)
+    if ext in RE_LICENSE:
+        re_license = RE_LICENSE[ext]
+    elif base in RE_LICENSE:
+        re_license = RE_LICENSE[base]
+    else:
+        log(args.skips, 'skip', filename)
+        continue
+    try:
+        text = load(filename)
+    except:
+        continue
+    m = re.search(re_license, text)
+    if m:
+        pass
+    elif 'DO NOT EDIT' not in text and filename != 'src/boringssl/err_data.c':
+        log(1, 'copyright missing', filename)
+        ok = False
 
 sys.exit(0 if ok else 1)
diff --git a/tools/distrib/check_include_guards.py b/tools/distrib/check_include_guards.py
index e46f1c9f4c..24e076afda 100755
--- a/tools/distrib/check_include_guards.py
+++ b/tools/distrib/check_include_guards.py
@@ -23,136 +23,136 @@ import subprocess
 
 
 def build_valid_guard(fpath):
-  prefix = 'GRPC_' if not fpath.startswith('include/') else ''
-  return prefix + '_'.join(fpath.replace('++', 'XX').replace('.', '_').upper().split('/')[1:])
+    prefix = 'GRPC_' if not fpath.startswith('include/') else ''
+    return prefix + '_'.join(
+        fpath.replace('++', 'XX').replace('.', '_').upper().split('/')[1:])
 
 
 def load(fpath):
-  with open(fpath, 'r') as f:
-    return f.read()
+    with open(fpath, 'r') as f:
+        return f.read()
 
 
 def save(fpath, contents):
-  with open(fpath, 'w') as f:
-    f.write(contents)
+    with open(fpath, 'w') as f:
+        f.write(contents)
 
 
 class GuardValidator(object):
-  def __init__(self):
-    self.ifndef_re = re.compile(r'#ifndef ([A-Z][A-Z_1-9]*)')
-    self.define_re = re.compile(r'#define ([A-Z][A-Z_1-9]*)')
-    self.endif_c_re = re.compile(r'#endif /\* ([A-Z][A-Z_1-9]*) (?:\\ *\n *)?\*/')
-    self.endif_cpp_re = re.compile(r'#endif  // ([A-Z][A-Z_1-9]*)')
-    self.failed = False
-
-  def fail(self, fpath, regexp, fcontents, match_txt, correct, fix):
-    cpp_header = 'grpc++' in fpath
-    self.failed = True
-    invalid_guards_msg_template = (
-        '{0}: Missing preprocessor guards (RE {1}). '
-        'Please wrap your code around the following guards:\n'
-        '#ifndef {2}\n'
-        '#define {2}\n'
-        '...\n'
-        '... epic code ...\n'
-        '...\n') + ('#endif  // {2}' if cpp_header else '#endif /* {2} */')
-    if not match_txt:
-      print invalid_guards_msg_template.format(fpath, regexp.pattern,
-                                               build_valid_guard(fpath))
-      return fcontents
-
-    print ('{}: Wrong preprocessor guards (RE {}):'
-           '\n\tFound {}, expected {}').format(
-        fpath, regexp.pattern, match_txt, correct)
-    if fix:
-      print 'Fixing {}...\n'.format(fpath)
-      fixed_fcontents = re.sub(match_txt, correct, fcontents)
-      if fixed_fcontents:
+
+    def __init__(self):
+        self.ifndef_re = re.compile(r'#ifndef ([A-Z][A-Z_1-9]*)')
+        self.define_re = re.compile(r'#define ([A-Z][A-Z_1-9]*)')
+        self.endif_c_re = re.compile(
+            r'#endif /\* ([A-Z][A-Z_1-9]*) (?:\\ *\n *)?\*/')
+        self.endif_cpp_re = re.compile(r'#endif  // ([A-Z][A-Z_1-9]*)')
         self.failed = False
-      return fixed_fcontents
-    else:
-      print
-    return fcontents
-
-  def check(self, fpath, fix):
-    cpp_header = 'grpc++' in fpath
-    valid_guard = build_valid_guard(fpath)
-
-    fcontents = load(fpath)
-
-    match = self.ifndef_re.search(fcontents)
-    if not match:
-      print 'something drastically wrong with: %s' % fpath
-      return False # failed
-    if match.lastindex is None:
-      # No ifndef. Request manual addition with hints
-      self.fail(fpath, match.re, match.string, '', '', False)
-      return False  # failed
-
-    # Does the guard end with a '_H'?
-    running_guard = match.group(1)
-    if not running_guard.endswith('_H'):
-      fcontents = self.fail(fpath, match.re, match.string, match.group(1),
-                            valid_guard, fix)
-      if fix: save(fpath, fcontents)
-
-    # Is it the expected one based on the file path?
-    if running_guard != valid_guard:
-      fcontents = self.fail(fpath, match.re, match.string, match.group(1),
-                            valid_guard, fix)
-      if fix: save(fpath, fcontents)
-
-    # Is there a #define? Is it the same as the #ifndef one?
-    match = self.define_re.search(fcontents)
-    if match.lastindex is None:
-      # No define. Request manual addition with hints
-      self.fail(fpath, match.re, match.string, '', '', False)
-      return False  # failed
-
-    # Is the #define guard the same as the #ifndef guard?
-    if match.group(1) != running_guard:
-      fcontents = self.fail(fpath, match.re, match.string, match.group(1),
-                            valid_guard, fix)
-      if fix: save(fpath, fcontents)
-
-    # Is there a properly commented #endif?
-    endif_re = self.endif_cpp_re if cpp_header else self.endif_c_re
-    flines = fcontents.rstrip().splitlines()
-    match = endif_re.search('\n'.join(flines[-2:]))
-    if not match:
-      # No endif. Check if we have the last line as just '#endif' and if so
-      # replace it with a properly commented one.
-      if flines[-1] == '#endif':
-        flines[-1] = ('#endif' +
-                      ('  // {}\n'.format(valid_guard) if cpp_header
-                       else ' /* {} */\n'.format(valid_guard)))
+
+    def fail(self, fpath, regexp, fcontents, match_txt, correct, fix):
+        cpp_header = 'grpc++' in fpath
+        self.failed = True
+        invalid_guards_msg_template = (
+            '{0}: Missing preprocessor guards (RE {1}). '
+            'Please wrap your code around the following guards:\n'
+            '#ifndef {2}\n'
+            '#define {2}\n'
+            '...\n'
+            '... epic code ...\n'
+            '...\n') + ('#endif  // {2}' if cpp_header else '#endif /* {2} */')
+        if not match_txt:
+            print invalid_guards_msg_template.format(fpath, regexp.pattern,
+                                                     build_valid_guard(fpath))
+            return fcontents
+
+        print('{}: Wrong preprocessor guards (RE {}):'
+              '\n\tFound {}, expected {}').format(fpath, regexp.pattern,
+                                                  match_txt, correct)
         if fix:
-            fcontents = '\n'.join(flines)
-            save(fpath, fcontents)
-      else:
-        # something else is wrong, bail out
-        self.fail(fpath, endif_re, flines[-1], '', '', False)
-    elif match.group(1) != running_guard:
-      # Is the #endif guard the same as the #ifndef and #define guards?
-      fcontents = self.fail(fpath, endif_re, fcontents, match.group(1),
-                            valid_guard, fix)
-      if fix: save(fpath, fcontents)
-
-    return not self.failed  # Did the check succeed? (ie, not failed)
+            print 'Fixing {}...\n'.format(fpath)
+            fixed_fcontents = re.sub(match_txt, correct, fcontents)
+            if fixed_fcontents:
+                self.failed = False
+            return fixed_fcontents
+        else:
+            print
+        return fcontents
+
+    def check(self, fpath, fix):
+        cpp_header = 'grpc++' in fpath
+        valid_guard = build_valid_guard(fpath)
+
+        fcontents = load(fpath)
+
+        match = self.ifndef_re.search(fcontents)
+        if not match:
+            print 'something drastically wrong with: %s' % fpath
+            return False  # failed
+        if match.lastindex is None:
+            # No ifndef. Request manual addition with hints
+            self.fail(fpath, match.re, match.string, '', '', False)
+            return False  # failed
+
+        # Does the guard end with a '_H'?
+        running_guard = match.group(1)
+        if not running_guard.endswith('_H'):
+            fcontents = self.fail(fpath, match.re, match.string,
+                                  match.group(1), valid_guard, fix)
+            if fix: save(fpath, fcontents)
+
+        # Is it the expected one based on the file path?
+        if running_guard != valid_guard:
+            fcontents = self.fail(fpath, match.re, match.string,
+                                  match.group(1), valid_guard, fix)
+            if fix: save(fpath, fcontents)
+
+        # Is there a #define? Is it the same as the #ifndef one?
+        match = self.define_re.search(fcontents)
+        if match.lastindex is None:
+            # No define. Request manual addition with hints
+            self.fail(fpath, match.re, match.string, '', '', False)
+            return False  # failed
+
+        # Is the #define guard the same as the #ifndef guard?
+        if match.group(1) != running_guard:
+            fcontents = self.fail(fpath, match.re, match.string,
+                                  match.group(1), valid_guard, fix)
+            if fix: save(fpath, fcontents)
+
+        # Is there a properly commented #endif?
+        endif_re = self.endif_cpp_re if cpp_header else self.endif_c_re
+        flines = fcontents.rstrip().splitlines()
+        match = endif_re.search('\n'.join(flines[-2:]))
+        if not match:
+            # No endif. Check if we have the last line as just '#endif' and if so
+            # replace it with a properly commented one.
+            if flines[-1] == '#endif':
+                flines[-1] = (
+                    '#endif' +
+                    ('  // {}\n'.format(valid_guard)
+                     if cpp_header else ' /* {} */\n'.format(valid_guard)))
+                if fix:
+                    fcontents = '\n'.join(flines)
+                    save(fpath, fcontents)
+            else:
+                # something else is wrong, bail out
+                self.fail(fpath, endif_re, flines[-1], '', '', False)
+        elif match.group(1) != running_guard:
+            # Is the #endif guard the same as the #ifndef and #define guards?
+            fcontents = self.fail(fpath, endif_re, fcontents,
+                                  match.group(1), valid_guard, fix)
+            if fix: save(fpath, fcontents)
+
+        return not self.failed  # Did the check succeed? (ie, not failed)
+
 
 # find our home
-ROOT = os.path.abspath(
-    os.path.join(os.path.dirname(sys.argv[0]), '../..'))
+ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
 os.chdir(ROOT)
 
 # parse command line
 argp = argparse.ArgumentParser(description='include guard checker')
-argp.add_argument('-f', '--fix',
-                  default=False,
-                  action='store_true');
-argp.add_argument('--precommit',
-                  default=False,
-                  action='store_true')
+argp.add_argument('-f', '--fix', default=False, action='store_true')
+argp.add_argument('--precommit', default=False, action='store_true')
 args = argp.parse_args()
 
 KNOWN_BAD = set([
@@ -161,12 +161,11 @@ KNOWN_BAD = set([
     'include/grpc++/ext/reflection.pb.h',
 ])
 
-
 grep_filter = r"grep -E '^(include|src/core)/.*\.h$'"
 if args.precommit:
-  git_command = 'git diff --name-only HEAD'
+    git_command = 'git diff --name-only HEAD'
 else:
-  git_command = 'git ls-tree -r --name-only -r HEAD'
+    git_command = 'git ls-tree -r --name-only -r HEAD'
 
 FILE_LIST_COMMAND = ' | '.join((git_command, grep_filter))
 
@@ -174,17 +173,17 @@ FILE_LIST_COMMAND = ' | '.join((git_command, grep_filter))
 ok = True
 filename_list = []
 try:
-  filename_list = subprocess.check_output(FILE_LIST_COMMAND,
-                                          shell=True).splitlines()
-  # Filter out non-existent files (ie, file removed or renamed)
-  filename_list = (f for f in filename_list if os.path.isfile(f))
+    filename_list = subprocess.check_output(
+        FILE_LIST_COMMAND, shell=True).splitlines()
+    # Filter out non-existent files (ie, file removed or renamed)
+    filename_list = (f for f in filename_list if os.path.isfile(f))
 except subprocess.CalledProcessError:
-  sys.exit(0)
+    sys.exit(0)
 
 validator = GuardValidator()
 
 for filename in filename_list:
-  if filename in KNOWN_BAD: continue
-  ok = ok and validator.check(filename, args.fix)
+    if filename in KNOWN_BAD: continue
+    ok = ok and validator.check(filename, args.fix)
 
 sys.exit(0 if ok else 1)
diff --git a/tools/distrib/python/check_grpcio_tools.py b/tools/distrib/python/check_grpcio_tools.py
index b56ccaea7a..2363017113 100755
--- a/tools/distrib/python/check_grpcio_tools.py
+++ b/tools/distrib/python/check_grpcio_tools.py
@@ -23,12 +23,11 @@ Have you called tools/distrib/python/make_grpcio_tools.py since upgrading protob
 submodule_commit_hash = _make.protobuf_submodule_commit_hash()
 
 with open(_make.GRPC_PYTHON_PROTOC_LIB_DEPS, 'r') as _protoc_lib_deps_file:
-  content = _protoc_lib_deps_file.read().splitlines()
+    content = _protoc_lib_deps_file.read().splitlines()
 
-testString = (_make.COMMIT_HASH_PREFIX +
-              submodule_commit_hash +
-              _make.COMMIT_HASH_SUFFIX)
+testString = (
+    _make.COMMIT_HASH_PREFIX + submodule_commit_hash + _make.COMMIT_HASH_SUFFIX)
 
 if testString not in content:
-  print(OUT_OF_DATE_MESSAGE.format(_make.GRPC_PYTHON_PROTOC_LIB_DEPS))
-  raise SystemExit(1)
+    print(OUT_OF_DATE_MESSAGE.format(_make.GRPC_PYTHON_PROTOC_LIB_DEPS))
+    raise SystemExit(1)
diff --git a/tools/distrib/python/docgen.py b/tools/distrib/python/docgen.py
index 1822e51d09..4d6fcb5d65 100755
--- a/tools/distrib/python/docgen.py
+++ b/tools/distrib/python/docgen.py
@@ -24,14 +24,20 @@ import sys
 import tempfile
 
 parser = argparse.ArgumentParser()
-parser.add_argument('--config', metavar='c', type=str, nargs=1,
-                    help='GRPC/GPR libraries build configuration',
-                    default='opt')
+parser.add_argument(
+    '--config',
+    metavar='c',
+    type=str,
+    nargs=1,
+    help='GRPC/GPR libraries build configuration',
+    default='opt')
 parser.add_argument('--submit', action='store_true')
 parser.add_argument('--gh-user', type=str, help='GitHub user to push as.')
-parser.add_argument('--gh-repo-owner', type=str,
-                    help=('Owner of the GitHub repository to be pushed; '
-                          'defaults to --gh-user.'))
+parser.add_argument(
+    '--gh-repo-owner',
+    type=str,
+    help=('Owner of the GitHub repository to be pushed; '
+          'defaults to --gh-user.'))
 parser.add_argument('--doc-branch', type=str)
 args = parser.parse_args()
 
@@ -59,60 +65,75 @@ environment.update({
 })
 
 subprocess_arguments_list = [
-    {'args': ['virtualenv', VIRTUALENV_DIR], 'env': environment},
-    {'args': [VIRTUALENV_PIP_PATH, 'install', '--upgrade', 'pip==9.0.1'],
-     'env': environment},
-    {'args': [VIRTUALENV_PIP_PATH, 'install', '-r', REQUIREMENTS_PATH],
-     'env': environment},
-    {'args': [VIRTUALENV_PYTHON_PATH, SETUP_PATH, 'build'], 'env': environment},
-    {'args': [VIRTUALENV_PYTHON_PATH, SETUP_PATH, 'doc'], 'env': environment},
+    {
+        'args': ['virtualenv', VIRTUALENV_DIR],
+        'env': environment
+    },
+    {
+        'args': [VIRTUALENV_PIP_PATH, 'install', '--upgrade', 'pip==9.0.1'],
+        'env': environment
+    },
+    {
+        'args': [VIRTUALENV_PIP_PATH, 'install', '-r', REQUIREMENTS_PATH],
+        'env': environment
+    },
+    {
+        'args': [VIRTUALENV_PYTHON_PATH, SETUP_PATH, 'build'],
+        'env': environment
+    },
+    {
+        'args': [VIRTUALENV_PYTHON_PATH, SETUP_PATH, 'doc'],
+        'env': environment
+    },
 ]
 
 for subprocess_arguments in subprocess_arguments_list:
-  print('Running command: {}'.format(subprocess_arguments['args']))
-  subprocess.check_call(**subprocess_arguments)
+    print('Running command: {}'.format(subprocess_arguments['args']))
+    subprocess.check_call(**subprocess_arguments)
 
 if args.submit:
-  assert args.gh_user
-  assert args.doc_branch
-  github_user = args.gh_user
-  github_repository_owner = (
-      args.gh_repo_owner if args.gh_repo_owner else args.gh_user)
-  # Create a temporary directory out of tree, checkout gh-pages from the
-  # specified repository, edit it, and push it. It's up to the user to then go
-  # onto GitHub and make a PR against grpc/grpc:gh-pages.
-  repo_parent_dir = tempfile.mkdtemp()
-  print('Documentation parent directory: {}'.format(repo_parent_dir))
-  repo_dir = os.path.join(repo_parent_dir, 'grpc')
-  python_doc_dir = os.path.join(repo_dir, 'python')
-  doc_branch = args.doc_branch
+    assert args.gh_user
+    assert args.doc_branch
+    github_user = args.gh_user
+    github_repository_owner = (args.gh_repo_owner
+                               if args.gh_repo_owner else args.gh_user)
+    # Create a temporary directory out of tree, checkout gh-pages from the
+    # specified repository, edit it, and push it. It's up to the user to then go
+    # onto GitHub and make a PR against grpc/grpc:gh-pages.
+    repo_parent_dir = tempfile.mkdtemp()
+    print('Documentation parent directory: {}'.format(repo_parent_dir))
+    repo_dir = os.path.join(repo_parent_dir, 'grpc')
+    python_doc_dir = os.path.join(repo_dir, 'python')
+    doc_branch = args.doc_branch
 
-  print('Cloning your repository...')
-  subprocess.check_call([
-          'git', 'clone', 'https://{}@github.com/{}/grpc'.format(
-              github_user, github_repository_owner)
-      ], cwd=repo_parent_dir)
-  subprocess.check_call([
-          'git', 'remote', 'add', 'upstream', 'https://github.com/grpc/grpc'
-      ], cwd=repo_dir)
-  subprocess.check_call(['git', 'fetch', 'upstream'], cwd=repo_dir)
-  subprocess.check_call([
-          'git', 'checkout', 'upstream/gh-pages', '-b', doc_branch
-      ], cwd=repo_dir)
-  print('Updating documentation...')
-  shutil.rmtree(python_doc_dir, ignore_errors=True)
-  shutil.copytree(DOC_PATH, python_doc_dir)
-  print('Attempting to push documentation...')
-  try:
-    subprocess.check_call(['git', 'add', '--all'], cwd=repo_dir)
-    subprocess.check_call([
-            'git', 'commit', '-m', 'Auto-update Python documentation'
-        ], cwd=repo_dir)
-    subprocess.check_call([
-            'git', 'push', '--set-upstream', 'origin', doc_branch
-        ], cwd=repo_dir)
-  except subprocess.CalledProcessError:
-    print('Failed to push documentation. Examine this directory and push '
-          'manually: {}'.format(repo_parent_dir))
-    sys.exit(1)
-  shutil.rmtree(repo_parent_dir)
+    print('Cloning your repository...')
+    subprocess.check_call(
+        [
+            'git', 'clone', 'https://{}@github.com/{}/grpc'.format(
+                github_user, github_repository_owner)
+        ],
+        cwd=repo_parent_dir)
+    subprocess.check_call(
+        ['git', 'remote', 'add', 'upstream', 'https://github.com/grpc/grpc'],
+        cwd=repo_dir)
+    subprocess.check_call(['git', 'fetch', 'upstream'], cwd=repo_dir)
+    subprocess.check_call(
+        ['git', 'checkout', 'upstream/gh-pages', '-b', doc_branch],
+        cwd=repo_dir)
+    print('Updating documentation...')
+    shutil.rmtree(python_doc_dir, ignore_errors=True)
+    shutil.copytree(DOC_PATH, python_doc_dir)
+    print('Attempting to push documentation...')
+    try:
+        subprocess.check_call(['git', 'add', '--all'], cwd=repo_dir)
+        subprocess.check_call(
+            ['git', 'commit', '-m', 'Auto-update Python documentation'],
+            cwd=repo_dir)
+        subprocess.check_call(
+            ['git', 'push', '--set-upstream', 'origin', doc_branch],
+            cwd=repo_dir)
+    except subprocess.CalledProcessError:
+        print('Failed to push documentation. Examine this directory and push '
+              'manually: {}'.format(repo_parent_dir))
+        sys.exit(1)
+    shutil.rmtree(repo_parent_dir)
diff --git a/tools/distrib/python/grpcio_tools/grpc_tools/__init__.py b/tools/distrib/python/grpcio_tools/grpc_tools/__init__.py
index 1454b678e1..5772620b60 100644
--- a/tools/distrib/python/grpcio_tools/grpc_tools/__init__.py
+++ b/tools/distrib/python/grpcio_tools/grpc_tools/__init__.py
@@ -11,4 +11,3 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
diff --git a/tools/distrib/python/grpcio_tools/grpc_tools/command.py b/tools/distrib/python/grpcio_tools/grpc_tools/command.py
index 28be137045..c0f9d93b0a 100644
--- a/tools/distrib/python/grpcio_tools/grpc_tools/command.py
+++ b/tools/distrib/python/grpcio_tools/grpc_tools/command.py
@@ -22,43 +22,44 @@ from grpc_tools import protoc
 
 
 def build_package_protos(package_root):
-  proto_files = []
-  inclusion_root = os.path.abspath(package_root)
-  for root, _, files in os.walk(inclusion_root):
-    for filename in files:
-      if filename.endswith('.proto'):
-        proto_files.append(os.path.abspath(os.path.join(root, filename)))
+    proto_files = []
+    inclusion_root = os.path.abspath(package_root)
+    for root, _, files in os.walk(inclusion_root):
+        for filename in files:
+            if filename.endswith('.proto'):
+                proto_files.append(
+                    os.path.abspath(os.path.join(root, filename)))
 
-  well_known_protos_include = pkg_resources.resource_filename(
-      'grpc_tools', '_proto')
+    well_known_protos_include = pkg_resources.resource_filename('grpc_tools',
+                                                                '_proto')
 
-  for proto_file in proto_files:
-    command = [
-        'grpc_tools.protoc',
-        '--proto_path={}'.format(inclusion_root),
-        '--proto_path={}'.format(well_known_protos_include),
-        '--python_out={}'.format(inclusion_root),
-        '--grpc_python_out={}'.format(inclusion_root),
-    ] + [proto_file]
-    if protoc.main(command) != 0:
-      sys.stderr.write('warning: {} failed'.format(command))
+    for proto_file in proto_files:
+        command = [
+            'grpc_tools.protoc',
+            '--proto_path={}'.format(inclusion_root),
+            '--proto_path={}'.format(well_known_protos_include),
+            '--python_out={}'.format(inclusion_root),
+            '--grpc_python_out={}'.format(inclusion_root),
+        ] + [proto_file]
+        if protoc.main(command) != 0:
+            sys.stderr.write('warning: {} failed'.format(command))
 
 
 class BuildPackageProtos(setuptools.Command):
-  """Command to generate project *_pb2.py modules from proto files."""
+    """Command to generate project *_pb2.py modules from proto files."""
 
-  description = 'build grpc protobuf modules'
-  user_options = []
+    description = 'build grpc protobuf modules'
+    user_options = []
 
-  def initialize_options(self):
-    pass
+    def initialize_options(self):
+        pass
 
-  def finalize_options(self):
-    pass
+    def finalize_options(self):
+        pass
 
-  def run(self):
-    # due to limitations of the proto generator, we require that only *one*
-    # directory is provided as an 'include' directory. We assume it's the '' key
-    # to `self.distribution.package_dir` (and get a key error if it's not
-    # there).
-    build_package_protos(self.distribution.package_dir[''])
+    def run(self):
+        # due to limitations of the proto generator, we require that only *one*
+        # directory is provided as an 'include' directory. We assume it's the '' key
+        # to `self.distribution.package_dir` (and get a key error if it's not
+        # there).
+        build_package_protos(self.distribution.package_dir[''])
diff --git a/tools/distrib/python/grpcio_tools/grpc_tools/protoc.py b/tools/distrib/python/grpcio_tools/grpc_tools/protoc.py
index efad51e07b..582cba0e39 100644
--- a/tools/distrib/python/grpcio_tools/grpc_tools/protoc.py
+++ b/tools/distrib/python/grpcio_tools/grpc_tools/protoc.py
@@ -19,16 +19,18 @@ import sys
 
 from grpc_tools import _protoc_compiler
 
+
 def main(command_arguments):
-  """Run the protocol buffer compiler with the given command-line arguments.
+    """Run the protocol buffer compiler with the given command-line arguments.
 
   Args:
     command_arguments: a list of strings representing command line arguments to
         `protoc`.
   """
-  command_arguments = [argument.encode() for argument in command_arguments]
-  return _protoc_compiler.run_main(command_arguments)
+    command_arguments = [argument.encode() for argument in command_arguments]
+    return _protoc_compiler.run_main(command_arguments)
+
 
 if __name__ == '__main__':
-  proto_include = pkg_resources.resource_filename('grpc_tools', '_proto')
-  sys.exit(main(sys.argv + ['-I{}'.format(proto_include)]))
+    proto_include = pkg_resources.resource_filename('grpc_tools', '_proto')
+    sys.exit(main(sys.argv + ['-I{}'.format(proto_include)]))
diff --git a/tools/distrib/python/grpcio_tools/grpc_version.py b/tools/distrib/python/grpcio_tools/grpc_version.py
index f613025be3..c4ed066122 100644
--- a/tools/distrib/python/grpcio_tools/grpc_version.py
+++ b/tools/distrib/python/grpcio_tools/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/tools/distrib/python/grpcio_tools/grpc_version.py.template`!!!
 
-VERSION='1.9.0.dev0'
+VERSION = '1.9.0.dev0'
diff --git a/tools/distrib/python/grpcio_tools/setup.py b/tools/distrib/python/grpcio_tools/setup.py
index 8d95cb5a28..342a220d5e 100644
--- a/tools/distrib/python/grpcio_tools/setup.py
+++ b/tools/distrib/python/grpcio_tools/setup.py
@@ -66,42 +66,42 @@ BUILD_WITH_CYTHON = os.environ.get('GRPC_PYTHON_BUILD_WITH_CYTHON', False)
 EXTRA_ENV_COMPILE_ARGS = os.environ.get('GRPC_PYTHON_CFLAGS', None)
 EXTRA_ENV_LINK_ARGS = os.environ.get('GRPC_PYTHON_LDFLAGS', None)
 if EXTRA_ENV_COMPILE_ARGS is None:
-  EXTRA_ENV_COMPILE_ARGS = '-std=c++11'
-  if 'win32' in sys.platform:
-    if sys.version_info < (3, 5):
-      # We use define flags here and don't directly add to DEFINE_MACROS below to
-      # ensure that the expert user/builder has a way of turning it off (via the
-      # envvars) without adding yet more GRPC-specific envvars.
-      # See https://sourceforge.net/p/mingw-w64/bugs/363/
-      if '32' in platform.architecture()[0]:
-        EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime32 -D_timeb=__timeb32 -D_ftime_s=_ftime32_s -D_hypot=hypot'
-      else:
-        EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime64 -D_timeb=__timeb64 -D_hypot=hypot'
-    else:
-      # We need to statically link the C++ Runtime, only the C runtime is
-      # available dynamically
-      EXTRA_ENV_COMPILE_ARGS += ' /MT'
-  elif "linux" in sys.platform or "darwin" in sys.platform:
-    EXTRA_ENV_COMPILE_ARGS += ' -fno-wrapv -frtti'
+    EXTRA_ENV_COMPILE_ARGS = '-std=c++11'
+    if 'win32' in sys.platform:
+        if sys.version_info < (3, 5):
+            # We use define flags here and don't directly add to DEFINE_MACROS below to
+            # ensure that the expert user/builder has a way of turning it off (via the
+            # envvars) without adding yet more GRPC-specific envvars.
+            # See https://sourceforge.net/p/mingw-w64/bugs/363/
+            if '32' in platform.architecture()[0]:
+                EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime32 -D_timeb=__timeb32 -D_ftime_s=_ftime32_s -D_hypot=hypot'
+            else:
+                EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime64 -D_timeb=__timeb64 -D_hypot=hypot'
+        else:
+            # We need to statically link the C++ Runtime, only the C runtime is
+            # available dynamically
+            EXTRA_ENV_COMPILE_ARGS += ' /MT'
+    elif "linux" in sys.platform or "darwin" in sys.platform:
+        EXTRA_ENV_COMPILE_ARGS += ' -fno-wrapv -frtti'
 if EXTRA_ENV_LINK_ARGS is None:
-  EXTRA_ENV_LINK_ARGS = ''
-  if "linux" in sys.platform or "darwin" in sys.platform:
-    EXTRA_ENV_LINK_ARGS += ' -lpthread'
-  elif "win32" in sys.platform and sys.version_info < (3, 5):
-    msvcr = cygwinccompiler.get_msvcr()[0]
-    # TODO(atash) sift through the GCC specs to see if libstdc++ can have any
-    # influence on the linkage outcome on MinGW for non-C++ programs.
-    EXTRA_ENV_LINK_ARGS += (
-        ' -static-libgcc -static-libstdc++ -mcrtdll={msvcr} '
-        '-static'.format(msvcr=msvcr))
+    EXTRA_ENV_LINK_ARGS = ''
+    if "linux" in sys.platform or "darwin" in sys.platform:
+        EXTRA_ENV_LINK_ARGS += ' -lpthread'
+    elif "win32" in sys.platform and sys.version_info < (3, 5):
+        msvcr = cygwinccompiler.get_msvcr()[0]
+        # TODO(atash) sift through the GCC specs to see if libstdc++ can have any
+        # influence on the linkage outcome on MinGW for non-C++ programs.
+        EXTRA_ENV_LINK_ARGS += (
+            ' -static-libgcc -static-libstdc++ -mcrtdll={msvcr} '
+            '-static'.format(msvcr=msvcr))
 
 EXTRA_COMPILE_ARGS = shlex.split(EXTRA_ENV_COMPILE_ARGS)
 EXTRA_LINK_ARGS = shlex.split(EXTRA_ENV_LINK_ARGS)
 
-CC_FILES = [
-  os.path.normpath(cc_file) for cc_file in protoc_lib_deps.CC_FILES]
+CC_FILES = [os.path.normpath(cc_file) for cc_file in protoc_lib_deps.CC_FILES]
 PROTO_FILES = [
-  os.path.normpath(proto_file) for proto_file in protoc_lib_deps.PROTO_FILES]
+    os.path.normpath(proto_file) for proto_file in protoc_lib_deps.PROTO_FILES
+]
 CC_INCLUDE = os.path.normpath(protoc_lib_deps.CC_INCLUDE)
 PROTO_INCLUDE = os.path.normpath(protoc_lib_deps.PROTO_INCLUDE)
 
@@ -110,107 +110,114 @@ GRPC_PYTHON_PROTO_RESOURCES_NAME = '_proto'
 
 DEFINE_MACROS = ()
 if "win32" in sys.platform:
-  DEFINE_MACROS += (('WIN32_LEAN_AND_MEAN', 1),)
-  if '64bit' in platform.architecture()[0]:
-    DEFINE_MACROS += (('MS_WIN64', 1),)
+    DEFINE_MACROS += (('WIN32_LEAN_AND_MEAN', 1),)
+    if '64bit' in platform.architecture()[0]:
+        DEFINE_MACROS += (('MS_WIN64', 1),)
 elif "linux" in sys.platform or "darwin" in sys.platform:
-  DEFINE_MACROS += (('HAVE_PTHREAD', 1),)
+    DEFINE_MACROS += (('HAVE_PTHREAD', 1),)
 
 # By default, Python3 distutils enforces compatibility of
 # c plugins (.so files) with the OSX version Python3 was built with.
 # For Python3.4, this is OSX 10.6, but we need Thread Local Support (__thread)
 if 'darwin' in sys.platform and PY3:
-  mac_target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
-  if mac_target and (pkg_resources.parse_version(mac_target) <
-		     pkg_resources.parse_version('10.9.0')):
-    os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.9'
-    os.environ['_PYTHON_HOST_PLATFORM'] = re.sub(
-        r'macosx-[0-9]+\.[0-9]+-(.+)',
-        r'macosx-10.9-\1',
-        util.get_platform())
+    mac_target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
+    if mac_target and (pkg_resources.parse_version(mac_target) <
+                       pkg_resources.parse_version('10.9.0')):
+        os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.9'
+        os.environ['_PYTHON_HOST_PLATFORM'] = re.sub(
+            r'macosx-[0-9]+\.[0-9]+-(.+)', r'macosx-10.9-\1',
+            util.get_platform())
+
 
 def package_data():
-  tools_path = GRPC_PYTHON_TOOLS_PACKAGE.replace('.', os.path.sep)
-  proto_resources_path = os.path.join(tools_path,
-                                      GRPC_PYTHON_PROTO_RESOURCES_NAME)
-  proto_files = []
-  for proto_file in PROTO_FILES:
-    source = os.path.join(PROTO_INCLUDE, proto_file)
-    target = os.path.join(proto_resources_path, proto_file)
-    relative_target = os.path.join(GRPC_PYTHON_PROTO_RESOURCES_NAME, proto_file)
-    try:
-      os.makedirs(os.path.dirname(target))
-    except OSError as error:
-      if error.errno == errno.EEXIST:
-        pass
-      else:
-        raise
-    shutil.copy(source, target)
-    proto_files.append(relative_target)
-  return {GRPC_PYTHON_TOOLS_PACKAGE: proto_files}
+    tools_path = GRPC_PYTHON_TOOLS_PACKAGE.replace('.', os.path.sep)
+    proto_resources_path = os.path.join(tools_path,
+                                        GRPC_PYTHON_PROTO_RESOURCES_NAME)
+    proto_files = []
+    for proto_file in PROTO_FILES:
+        source = os.path.join(PROTO_INCLUDE, proto_file)
+        target = os.path.join(proto_resources_path, proto_file)
+        relative_target = os.path.join(GRPC_PYTHON_PROTO_RESOURCES_NAME,
+                                       proto_file)
+        try:
+            os.makedirs(os.path.dirname(target))
+        except OSError as error:
+            if error.errno == errno.EEXIST:
+                pass
+            else:
+                raise
+        shutil.copy(source, target)
+        proto_files.append(relative_target)
+    return {GRPC_PYTHON_TOOLS_PACKAGE: proto_files}
+
 
 def extension_modules():
-  if BUILD_WITH_CYTHON:
-    plugin_sources = [os.path.join('grpc_tools', '_protoc_compiler.pyx')]
-  else:
-    plugin_sources = [os.path.join('grpc_tools', '_protoc_compiler.cpp')]
-
-  plugin_sources += [
-    os.path.join('grpc_tools', 'main.cc'),
-    os.path.join('grpc_root', 'src', 'compiler', 'python_generator.cc')]
-
-  #HACK: Substitute the embed.cc, which is a JS to C++
-  #      preprocessor with the generated code.
-  #      The generated code should not be material
-  #      to the parts of protoc we use (it affects
-  #      the JavaScript code generator, supposedly),
-  #      but we need to be cautious about it.
-  cc_files_clone = list(CC_FILES)
-  embed_cc_file = os.path.normpath('google/protobuf/compiler/js/embed.cc')
-  well_known_types_file = os.path.normpath(
-      'google/protobuf/compiler/js/well_known_types_embed.cc')
-  if embed_cc_file in cc_files_clone:
-    cc_files_clone.remove(embed_cc_file)
-  if well_known_types_file in cc_files_clone:
-    cc_files_clone.remove(well_known_types_file)
-    plugin_sources += [os.path.join('grpc_tools', 'protobuf_generated_well_known_types_embed.cc')]
-  plugin_sources += [os.path.join(CC_INCLUDE, cc_file) for cc_file in cc_files_clone]
-
-  plugin_ext = extension.Extension(
-      name='grpc_tools._protoc_compiler',
-      sources=plugin_sources,
-      include_dirs=[
-          '.',
-          'grpc_root',
-          os.path.join('grpc_root', 'include'),
-          CC_INCLUDE,
-      ],
-      language='c++',
-      define_macros=list(DEFINE_MACROS),
-      extra_compile_args=list(EXTRA_COMPILE_ARGS),
-      extra_link_args=list(EXTRA_LINK_ARGS),
-  )
-  extensions = [plugin_ext]
-  if BUILD_WITH_CYTHON:
-    from Cython import Build
-    return Build.cythonize(extensions)
-  else:
-    return extensions
+    if BUILD_WITH_CYTHON:
+        plugin_sources = [os.path.join('grpc_tools', '_protoc_compiler.pyx')]
+    else:
+        plugin_sources = [os.path.join('grpc_tools', '_protoc_compiler.cpp')]
+
+    plugin_sources += [
+        os.path.join('grpc_tools', 'main.cc'),
+        os.path.join('grpc_root', 'src', 'compiler', 'python_generator.cc')
+    ]
+
+    #HACK: Substitute the embed.cc, which is a JS to C++
+    #      preprocessor with the generated code.
+    #      The generated code should not be material
+    #      to the parts of protoc we use (it affects
+    #      the JavaScript code generator, supposedly),
+    #      but we need to be cautious about it.
+    cc_files_clone = list(CC_FILES)
+    embed_cc_file = os.path.normpath('google/protobuf/compiler/js/embed.cc')
+    well_known_types_file = os.path.normpath(
+        'google/protobuf/compiler/js/well_known_types_embed.cc')
+    if embed_cc_file in cc_files_clone:
+        cc_files_clone.remove(embed_cc_file)
+    if well_known_types_file in cc_files_clone:
+        cc_files_clone.remove(well_known_types_file)
+        plugin_sources += [
+            os.path.join('grpc_tools',
+                         'protobuf_generated_well_known_types_embed.cc')
+        ]
+    plugin_sources += [
+        os.path.join(CC_INCLUDE, cc_file) for cc_file in cc_files_clone
+    ]
+
+    plugin_ext = extension.Extension(
+        name='grpc_tools._protoc_compiler',
+        sources=plugin_sources,
+        include_dirs=[
+            '.',
+            'grpc_root',
+            os.path.join('grpc_root', 'include'),
+            CC_INCLUDE,
+        ],
+        language='c++',
+        define_macros=list(DEFINE_MACROS),
+        extra_compile_args=list(EXTRA_COMPILE_ARGS),
+        extra_link_args=list(EXTRA_LINK_ARGS),)
+    extensions = [plugin_ext]
+    if BUILD_WITH_CYTHON:
+        from Cython import Build
+        return Build.cythonize(extensions)
+    else:
+        return extensions
+
 
 setuptools.setup(
-  name='grpcio-tools',
-  version=grpc_version.VERSION,
-  description='Protobuf code generator for gRPC',
-  author='The gRPC Authors',
-  author_email='grpc-io@googlegroups.com',
-  url='https://grpc.io',
-  license='Apache License 2.0',
-  classifiers=CLASSIFIERS,
-  ext_modules=extension_modules(),
-  packages=setuptools.find_packages('.'),
-  install_requires=[
-    'protobuf>=3.5.0.post1',
-    'grpcio>={version}'.format(version=grpc_version.VERSION),
-  ],
-  package_data=package_data(),
-)
+    name='grpcio-tools',
+    version=grpc_version.VERSION,
+    description='Protobuf code generator for gRPC',
+    author='The gRPC Authors',
+    author_email='grpc-io@googlegroups.com',
+    url='https://grpc.io',
+    license='Apache License 2.0',
+    classifiers=CLASSIFIERS,
+    ext_modules=extension_modules(),
+    packages=setuptools.find_packages('.'),
+    install_requires=[
+        'protobuf>=3.5.0.post1',
+        'grpcio>={version}'.format(version=grpc_version.VERSION),
+    ],
+    package_data=package_data(),)
diff --git a/tools/distrib/python/make_grpcio_tools.py b/tools/distrib/python/make_grpcio_tools.py
index c865f0bcc0..216492a2f3 100755
--- a/tools/distrib/python/make_grpcio_tools.py
+++ b/tools/distrib/python/make_grpcio_tools.py
@@ -27,7 +27,7 @@ import sys
 import traceback
 import uuid
 
-DEPS_FILE_CONTENT="""
+DEPS_FILE_CONTENT = """
 # Copyright 2017 gRPC authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -60,15 +60,16 @@ PROTOBUF_CC_PREFIX = '//:src/'
 PROTOBUF_PROTO_PREFIX = '//:src/'
 
 GRPC_ROOT = os.path.abspath(
-    os.path.join(os.path.dirname(os.path.abspath(__file__)),
-                 '..', '..', '..'))
+    os.path.join(os.path.dirname(os.path.abspath(__file__)), '..', '..', '..'))
 
-GRPC_PYTHON_ROOT = os.path.join(GRPC_ROOT, 'tools', 'distrib',
-                                'python', 'grpcio_tools')
+GRPC_PYTHON_ROOT = os.path.join(GRPC_ROOT, 'tools', 'distrib', 'python',
+                                'grpcio_tools')
 
-GRPC_PYTHON_PROTOBUF_RELATIVE_ROOT = os.path.join('third_party', 'protobuf', 'src')
+GRPC_PYTHON_PROTOBUF_RELATIVE_ROOT = os.path.join('third_party', 'protobuf',
+                                                  'src')
 GRPC_PROTOBUF = os.path.join(GRPC_ROOT, GRPC_PYTHON_PROTOBUF_RELATIVE_ROOT)
-GRPC_PROTOBUF_SUBMODULE_ROOT = os.path.join(GRPC_ROOT, 'third_party', 'protobuf')
+GRPC_PROTOBUF_SUBMODULE_ROOT = os.path.join(GRPC_ROOT, 'third_party',
+                                            'protobuf')
 GRPC_PROTOC_PLUGINS = os.path.join(GRPC_ROOT, 'src', 'compiler')
 GRPC_PYTHON_PROTOBUF = os.path.join(GRPC_PYTHON_ROOT, 'third_party', 'protobuf',
                                     'src')
@@ -80,81 +81,91 @@ GRPC_PYTHON_PROTOC_LIB_DEPS = os.path.join(GRPC_PYTHON_ROOT,
 GRPC_INCLUDE = os.path.join(GRPC_ROOT, 'include')
 GRPC_PYTHON_INCLUDE = os.path.join(GRPC_PYTHON_ROOT, 'grpc_root', 'include')
 
-BAZEL_DEPS = os.path.join(GRPC_ROOT, 'tools', 'distrib', 'python', 'bazel_deps.sh')
+BAZEL_DEPS = os.path.join(GRPC_ROOT, 'tools', 'distrib', 'python',
+                          'bazel_deps.sh')
 BAZEL_DEPS_PROTOC_LIB_QUERY = '//:protoc_lib'
 BAZEL_DEPS_COMMON_PROTOS_QUERY = '//:well_known_protos'
 
+
 def protobuf_submodule_commit_hash():
-  """Gets the commit hash for the HEAD of the protobuf submodule currently
+    """Gets the commit hash for the HEAD of the protobuf submodule currently
      checked out."""
-  cwd = os.getcwd()
-  os.chdir(GRPC_PROTOBUF_SUBMODULE_ROOT)
-  output = subprocess.check_output(['git', 'rev-parse', 'HEAD'])
-  os.chdir(cwd)
-  return output.splitlines()[0].strip()
+    cwd = os.getcwd()
+    os.chdir(GRPC_PROTOBUF_SUBMODULE_ROOT)
+    output = subprocess.check_output(['git', 'rev-parse', 'HEAD'])
+    os.chdir(cwd)
+    return output.splitlines()[0].strip()
+
 
 def bazel_query(query):
-  output = subprocess.check_output([BAZEL_DEPS, query])
-  return output.splitlines()
+    output = subprocess.check_output([BAZEL_DEPS, query])
+    return output.splitlines()
+
 
 def get_deps():
-  """Write the result of the bazel query `query` against protobuf to
+    """Write the result of the bazel query `query` against protobuf to
      `out_file`."""
-  cc_files_output = bazel_query(BAZEL_DEPS_PROTOC_LIB_QUERY)
-  cc_files = [
-      name[len(PROTOBUF_CC_PREFIX):] for name in cc_files_output
-      if name.endswith('.cc') and name.startswith(PROTOBUF_CC_PREFIX)]
-  proto_files_output = bazel_query(BAZEL_DEPS_COMMON_PROTOS_QUERY)
-  proto_files = [
-      name[len(PROTOBUF_PROTO_PREFIX):] for name in proto_files_output
-      if name.endswith('.proto') and name.startswith(PROTOBUF_PROTO_PREFIX)]
-  commit_hash = protobuf_submodule_commit_hash()
-  deps_file_content = DEPS_FILE_CONTENT.format(
-      cc_files=cc_files,
-      proto_files=proto_files,
-      cc_include=repr(GRPC_PYTHON_PROTOBUF_RELATIVE_ROOT),
-      proto_include=repr(GRPC_PYTHON_PROTOBUF_RELATIVE_ROOT),
-      commit_hash=COMMIT_HASH_PREFIX + commit_hash + COMMIT_HASH_SUFFIX)
-  return deps_file_content
+    cc_files_output = bazel_query(BAZEL_DEPS_PROTOC_LIB_QUERY)
+    cc_files = [
+        name[len(PROTOBUF_CC_PREFIX):] for name in cc_files_output
+        if name.endswith('.cc') and name.startswith(PROTOBUF_CC_PREFIX)
+    ]
+    proto_files_output = bazel_query(BAZEL_DEPS_COMMON_PROTOS_QUERY)
+    proto_files = [
+        name[len(PROTOBUF_PROTO_PREFIX):] for name in proto_files_output
+        if name.endswith('.proto') and name.startswith(PROTOBUF_PROTO_PREFIX)
+    ]
+    commit_hash = protobuf_submodule_commit_hash()
+    deps_file_content = DEPS_FILE_CONTENT.format(
+        cc_files=cc_files,
+        proto_files=proto_files,
+        cc_include=repr(GRPC_PYTHON_PROTOBUF_RELATIVE_ROOT),
+        proto_include=repr(GRPC_PYTHON_PROTOBUF_RELATIVE_ROOT),
+        commit_hash=COMMIT_HASH_PREFIX + commit_hash + COMMIT_HASH_SUFFIX)
+    return deps_file_content
+
 
 def long_path(path):
-  if os.name == 'nt':
-    return '\\\\?\\' + path
-  else:
-    return path
+    if os.name == 'nt':
+        return '\\\\?\\' + path
+    else:
+        return path
+
 
 def main():
-  os.chdir(GRPC_ROOT)
-
-  for source, target in [
-      (GRPC_PROTOBUF, GRPC_PYTHON_PROTOBUF),
-      (GRPC_PROTOC_PLUGINS, GRPC_PYTHON_PROTOC_PLUGINS),
-      (GRPC_INCLUDE, GRPC_PYTHON_INCLUDE)]:
-    for source_dir, _, files in os.walk(source):
-      target_dir = os.path.abspath(os.path.join(target, os.path.relpath(source_dir, source)))
-      try:
-        os.makedirs(target_dir)
-      except OSError as error:
-        if error.errno != errno.EEXIST:
-          raise
-      for relative_file in files:
-        source_file = os.path.abspath(os.path.join(source_dir, relative_file))
-        target_file = os.path.abspath(os.path.join(target_dir, relative_file))
-        shutil.copyfile(source_file, target_file)
-
-  try:
-    protoc_lib_deps_content = get_deps()
-  except Exception as error:
-    # We allow this script to succeed even if we couldn't get the dependencies,
-    # as then we can assume that even without a successful bazel run the
-    # dependencies currently in source control are 'good enough'.
-    sys.stderr.write("Got non-fatal error:\n")
-    traceback.print_exc(file=sys.stderr)
-    return
-  # If we successfully got the dependencies, truncate and rewrite the deps file.
-  with open(GRPC_PYTHON_PROTOC_LIB_DEPS, 'w') as deps_file:
-    deps_file.write(protoc_lib_deps_content)
+    os.chdir(GRPC_ROOT)
+
+    for source, target in [(GRPC_PROTOBUF, GRPC_PYTHON_PROTOBUF),
+                           (GRPC_PROTOC_PLUGINS, GRPC_PYTHON_PROTOC_PLUGINS),
+                           (GRPC_INCLUDE, GRPC_PYTHON_INCLUDE)]:
+        for source_dir, _, files in os.walk(source):
+            target_dir = os.path.abspath(
+                os.path.join(target, os.path.relpath(source_dir, source)))
+            try:
+                os.makedirs(target_dir)
+            except OSError as error:
+                if error.errno != errno.EEXIST:
+                    raise
+            for relative_file in files:
+                source_file = os.path.abspath(
+                    os.path.join(source_dir, relative_file))
+                target_file = os.path.abspath(
+                    os.path.join(target_dir, relative_file))
+                shutil.copyfile(source_file, target_file)
+
+    try:
+        protoc_lib_deps_content = get_deps()
+    except Exception as error:
+        # We allow this script to succeed even if we couldn't get the dependencies,
+        # as then we can assume that even without a successful bazel run the
+        # dependencies currently in source control are 'good enough'.
+        sys.stderr.write("Got non-fatal error:\n")
+        traceback.print_exc(file=sys.stderr)
+        return
+    # If we successfully got the dependencies, truncate and rewrite the deps file.
+    with open(GRPC_PYTHON_PROTOC_LIB_DEPS, 'w') as deps_file:
+        deps_file.write(protoc_lib_deps_content)
 
-if __name__ == '__main__':
-  main()
 
+if __name__ == '__main__':
+    main()
diff --git a/tools/distrib/python/submit.py b/tools/distrib/python/submit.py
index 92eab5ad65..aff71b5eb1 100755
--- a/tools/distrib/python/submit.py
+++ b/tools/distrib/python/submit.py
@@ -21,43 +21,52 @@ import subprocess
 parser = argparse.ArgumentParser(
     description='Submit the package to a PyPI repository.')
 parser.add_argument(
-    '--repository', '-r', metavar='r', type=str, default='pypi',
+    '--repository',
+    '-r',
+    metavar='r',
+    type=str,
+    default='pypi',
     help='The repository to push the package to. '
-         'Ensure the value appears in your .pypirc file. '
-         'Defaults to "pypi".'
-)
+    'Ensure the value appears in your .pypirc file. '
+    'Defaults to "pypi".')
 parser.add_argument(
-    '--identity', '-i', metavar='i', type=str,
-    help='GPG identity to sign the files with.'
-)
+    '--identity',
+    '-i',
+    metavar='i',
+    type=str,
+    help='GPG identity to sign the files with.')
 parser.add_argument(
-    '--username', '-u', metavar='u', type=str,
+    '--username',
+    '-u',
+    metavar='u',
+    type=str,
     help='Username to authenticate with the repository. Not needed if you have '
-         'configured your .pypirc to include your username.'
-)
+    'configured your .pypirc to include your username.')
 parser.add_argument(
-    '--password', '-p', metavar='p', type=str,
+    '--password',
+    '-p',
+    metavar='p',
+    type=str,
     help='Password to authenticate with the repository. Not needed if you have '
-         'configured your .pypirc to include your password.'
-)
+    'configured your .pypirc to include your password.')
 parser.add_argument(
-    '--bdist', '-b', action='store_true',
-    help='Generate a binary distribution (wheel) for the current OS.'
-)
+    '--bdist',
+    '-b',
+    action='store_true',
+    help='Generate a binary distribution (wheel) for the current OS.')
 parser.add_argument(
-    '--dist-args', type=str,
-    help='Additional arguments to pass to the *dist setup.py command.'
-)
+    '--dist-args',
+    type=str,
+    help='Additional arguments to pass to the *dist setup.py command.')
 args = parser.parse_args()
 
 # Move to the root directory of Python GRPC.
-pkgdir = os.path.join(os.path.dirname(os.path.abspath(__file__)),
-                      '../../../')
+pkgdir = os.path.join(os.path.dirname(os.path.abspath(__file__)), '../../../')
 # Remove previous distributions; they somehow confuse twine.
 try:
-  shutil.rmtree(os.path.join(pkgdir, 'dist/'))
+    shutil.rmtree(os.path.join(pkgdir, 'dist/'))
 except:
-  pass
+    pass
 
 # Build the Cython C files
 build_env = os.environ.copy()
@@ -67,20 +76,20 @@ subprocess.call(cmd, cwd=pkgdir, env=build_env)
 
 # Make the push.
 if args.bdist:
-  cmd = ['python', 'setup.py', 'bdist_wheel']
+    cmd = ['python', 'setup.py', 'bdist_wheel']
 else:
-  cmd = ['python', 'setup.py', 'sdist']
+    cmd = ['python', 'setup.py', 'sdist']
 if args.dist_args:
-  cmd += args.dist_args.split()
+    cmd += args.dist_args.split()
 subprocess.call(cmd, cwd=pkgdir)
 
 cmd = ['twine', 'upload', '-r', args.repository]
 if args.identity is not None:
-  cmd.extend(['-i', args.identity])
+    cmd.extend(['-i', args.identity])
 if args.username is not None:
-  cmd.extend(['-u', args.username])
+    cmd.extend(['-u', args.username])
 if args.password is not None:
-  cmd.extend(['-p', args.password])
+    cmd.extend(['-p', args.password])
 cmd.append('dist/*')
 
 subprocess.call(cmd, cwd=pkgdir)
diff --git a/tools/distrib/run_clang_tidy.py b/tools/distrib/run_clang_tidy.py
index d002a04de9..3ac712ea9e 100755
--- a/tools/distrib/run_clang_tidy.py
+++ b/tools/distrib/run_clang_tidy.py
@@ -20,51 +20,51 @@ import argparse
 import multiprocessing
 
 sys.path.append(
-  os.path.join(
-    os.path.dirname(sys.argv[0]), '..', 'run_tests', 'python_utils'))
+    os.path.join(
+        os.path.dirname(sys.argv[0]), '..', 'run_tests', 'python_utils'))
 import jobset
 
 GRPC_CHECKS = [
-  'modernize-use-nullptr',
+    'modernize-use-nullptr',
 ]
 
 extra_args = [
-  '-x',
-  'c++',
-  '-std=c++11',
+    '-x',
+    'c++',
+    '-std=c++11',
 ]
 with open('.clang_complete') as f:
-  for line in f:
-    line = line.strip()
-    if line.startswith('-I'):
-      extra_args.append(line)
+    for line in f:
+        line = line.strip()
+        if line.startswith('-I'):
+            extra_args.append(line)
 
 clang_tidy = os.environ.get('CLANG_TIDY', 'clang-tidy')
 
 argp = argparse.ArgumentParser(description='Run clang-tidy against core')
 argp.add_argument('files', nargs='+', help='Files to tidy')
 argp.add_argument('--fix', dest='fix', action='store_true')
-argp.add_argument('-j', '--jobs', type=int, default=multiprocessing.cpu_count(),
-                  help='Number of CPUs to use')
+argp.add_argument(
+    '-j',
+    '--jobs',
+    type=int,
+    default=multiprocessing.cpu_count(),
+    help='Number of CPUs to use')
 argp.set_defaults(fix=False)
 args = argp.parse_args()
 
 cmdline = [
-    clang_tidy,
-    '--checks=-*,%s' % ','.join(GRPC_CHECKS),
+    clang_tidy, '--checks=-*,%s' % ','.join(GRPC_CHECKS),
     '--warnings-as-errors=%s' % ','.join(GRPC_CHECKS)
-] + [
-    '--extra-arg-before=%s' % arg
-    for arg in extra_args
-]
+] + ['--extra-arg-before=%s' % arg for arg in extra_args]
 
 if args.fix:
-  cmdline.append('--fix')
+    cmdline.append('--fix')
 
 jobs = []
 for filename in args.files:
-  jobs.append(jobset.JobSpec(cmdline + [filename],
-                             shortname=filename,
-                             ))#verbose_success=True))
+    jobs.append(jobset.JobSpec(
+        cmdline + [filename],
+        shortname=filename,))  #verbose_success=True))
 
 jobset.run(jobs, maxjobs=args.jobs)
diff --git a/tools/distrib/yapf_code.sh b/tools/distrib/yapf_code.sh
index e5beb70117..44eb967c4b 100755
--- a/tools/distrib/yapf_code.sh
+++ b/tools/distrib/yapf_code.sh
@@ -19,14 +19,13 @@ set -ex
 cd "$(dirname "${0}")/../.."
 
 DIRS=(
+    'examples/python'
     'src/python'
+    'tools'
 )
 EXCLUSIONS=(
-    'grpcio/grpc_*.py'
-    'grpcio_health_checking/grpc_*.py'
-    'grpcio_reflection/grpc_*.py'
-    'grpcio_testing/grpc_*.py'
-    'grpcio_tests/grpc_*.py'
+    '*protoc_lib_deps.py'  # this file is auto-generated
+    '*_pb2*.py'  # no need to format protoc generated files
 )
 
 VIRTUALENV=yapf_virtual_environment
diff --git a/tools/flakes/detect_flakes.py b/tools/flakes/detect_flakes.py
index c5c7f61771..b066ee6139 100644
--- a/tools/flakes/detect_flakes.py
+++ b/tools/flakes/detect_flakes.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Detect new flakes introduced in the last 24h hours with respect to the
 previous six days"""
 
@@ -32,26 +31,29 @@ sys.path.append(gcp_utils_dir)
 
 import big_query_utils
 
+
 def print_table(table):
     kokoro_base_url = 'https://kokoro.corp.google.com/job/'
     for k, v in table.items():
-      job_name = v[0]
-      build_id = v[1]
-      ts = int(float(v[2]))
-      # TODO(dgq): timezone handling is wrong. We need to determine the timezone
-      # of the computer running this script.
-      human_ts = datetime.datetime.utcfromtimestamp(ts).strftime('%Y-%m-%d %H:%M:%S PDT')
-      job_path = '{}/{}'.format('/job/'.join(job_name.split('/')), build_id)
-      full_kokoro_url = kokoro_base_url + job_path
-      print("Test: {}, Timestamp: {}, url: {}\n".format(k, human_ts, full_kokoro_url))
+        job_name = v[0]
+        build_id = v[1]
+        ts = int(float(v[2]))
+        # TODO(dgq): timezone handling is wrong. We need to determine the timezone
+        # of the computer running this script.
+        human_ts = datetime.datetime.utcfromtimestamp(ts).strftime(
+            '%Y-%m-%d %H:%M:%S PDT')
+        job_path = '{}/{}'.format('/job/'.join(job_name.split('/')), build_id)
+        full_kokoro_url = kokoro_base_url + job_path
+        print("Test: {}, Timestamp: {}, url: {}\n".format(k, human_ts,
+                                                          full_kokoro_url))
 
 
 def get_flaky_tests(days_lower_bound, days_upper_bound, limit=None):
-  """ period is one of "WEEK", "DAY", etc.
+    """ period is one of "WEEK", "DAY", etc.
   (see https://cloud.google.com/bigquery/docs/reference/standard-sql/functions-and-operators#date_add). """
 
-  bq = big_query_utils.create_big_query()
-  query = """
+    bq = big_query_utils.create_big_query()
+    query = """
 SELECT
   REGEXP_REPLACE(test_name, r'/\d+', '') AS filtered_test_name,
   job_name,
@@ -65,41 +67,45 @@ WHERE
   AND NOT REGEXP_MATCH(job_name, '.*portability.*')
   AND result != 'PASSED' AND result != 'SKIPPED'
 ORDER BY timestamp desc
-""".format(days_lower_bound=days_lower_bound, days_upper_bound=days_upper_bound)
-  if limit:
-    query += '\n LIMIT {}'.format(limit)
-  query_job = big_query_utils.sync_query_job(bq, 'grpc-testing', query)
-  page = bq.jobs().getQueryResults(
-      pageToken=None, **query_job['jobReference']).execute(num_retries=3)
-  rows = page.get('rows')
-  if rows:
-    return {row['f'][0]['v']:
+""".format(
+        days_lower_bound=days_lower_bound, days_upper_bound=days_upper_bound)
+    if limit:
+        query += '\n LIMIT {}'.format(limit)
+    query_job = big_query_utils.sync_query_job(bq, 'grpc-testing', query)
+    page = bq.jobs().getQueryResults(
+        pageToken=None, **query_job['jobReference']).execute(num_retries=3)
+    rows = page.get('rows')
+    if rows:
+        return {
+            row['f'][0]['v']:
             (row['f'][1]['v'], row['f'][2]['v'], row['f'][3]['v'])
-            for row in rows}
-  else:
-    return {}
+            for row in rows
+        }
+    else:
+        return {}
 
 
 def get_new_flakes():
-  last_week_sans_yesterday = get_flaky_tests(-14, -1)
-  last_24 = get_flaky_tests(0, +1)
-  last_week_sans_yesterday_names = set(last_week_sans_yesterday.keys())
-  last_24_names = set(last_24.keys())
-  logging.debug('|last_week_sans_yesterday| =', len(last_week_sans_yesterday_names))
-  logging.debug('|last_24_names| =', len(last_24_names))
-  new_flakes = last_24_names - last_week_sans_yesterday_names
-  logging.debug('|new_flakes| = ', len(new_flakes))
-  return {k: last_24[k] for k in new_flakes}
+    last_week_sans_yesterday = get_flaky_tests(-14, -1)
+    last_24 = get_flaky_tests(0, +1)
+    last_week_sans_yesterday_names = set(last_week_sans_yesterday.keys())
+    last_24_names = set(last_24.keys())
+    logging.debug('|last_week_sans_yesterday| =',
+                  len(last_week_sans_yesterday_names))
+    logging.debug('|last_24_names| =', len(last_24_names))
+    new_flakes = last_24_names - last_week_sans_yesterday_names
+    logging.debug('|new_flakes| = ', len(new_flakes))
+    return {k: last_24[k] for k in new_flakes}
 
 
 def main():
-  new_flakes = get_new_flakes()
-  if new_flakes:
-    print("Found {} new flakes:".format(len(new_flakes)))
-    print_table(new_flakes)
-  else:
-    print("No new flakes found!")
+    new_flakes = get_new_flakes()
+    if new_flakes:
+        print("Found {} new flakes:".format(len(new_flakes)))
+        print_table(new_flakes)
+    else:
+        print("No new flakes found!")
 
 
 if __name__ == '__main__':
-  main()
+    main()
diff --git a/tools/gcp/utils/big_query_utils.py b/tools/gcp/utils/big_query_utils.py
index 77a5f5691e..3e811ca2bf 100755
--- a/tools/gcp/utils/big_query_utils.py
+++ b/tools/gcp/utils/big_query_utils.py
@@ -28,154 +28,174 @@ NUM_RETRIES = 3
 
 
 def create_big_query():
-  """Authenticates with cloud platform and gets a BiqQuery service object
+    """Authenticates with cloud platform and gets a BiqQuery service object
   """
-  creds = GoogleCredentials.get_application_default()
-  return discovery.build('bigquery', 'v2', credentials=creds, cache_discovery=False)
+    creds = GoogleCredentials.get_application_default()
+    return discovery.build(
+        'bigquery', 'v2', credentials=creds, cache_discovery=False)
 
 
 def create_dataset(biq_query, project_id, dataset_id):
-  is_success = True
-  body = {
-      'datasetReference': {
-          'projectId': project_id,
-          'datasetId': dataset_id
-      }
-  }
-
-  try:
-    dataset_req = biq_query.datasets().insert(projectId=project_id, body=body)
-    dataset_req.execute(num_retries=NUM_RETRIES)
-  except HttpError as http_error:
-    if http_error.resp.status == 409:
-      print 'Warning: The dataset %s already exists' % dataset_id
-    else:
-      # Note: For more debugging info, print "http_error.content"
-      print 'Error in creating dataset: %s. Err: %s' % (dataset_id, http_error)
-      is_success = False
-  return is_success
+    is_success = True
+    body = {
+        'datasetReference': {
+            'projectId': project_id,
+            'datasetId': dataset_id
+        }
+    }
+
+    try:
+        dataset_req = biq_query.datasets().insert(
+            projectId=project_id, body=body)
+        dataset_req.execute(num_retries=NUM_RETRIES)
+    except HttpError as http_error:
+        if http_error.resp.status == 409:
+            print 'Warning: The dataset %s already exists' % dataset_id
+        else:
+            # Note: For more debugging info, print "http_error.content"
+            print 'Error in creating dataset: %s. Err: %s' % (dataset_id,
+                                                              http_error)
+            is_success = False
+    return is_success
 
 
 def create_table(big_query, project_id, dataset_id, table_id, table_schema,
                  description):
-  fields = [{'name': field_name,
-             'type': field_type,
-             'description': field_description
-             } for (field_name, field_type, field_description) in table_schema]
-  return create_table2(big_query, project_id, dataset_id, table_id,
-                       fields, description)
-
-
-def create_partitioned_table(big_query, project_id, dataset_id, table_id, table_schema,
-                             description, partition_type='DAY', expiration_ms=_EXPIRATION_MS):
-  """Creates a partitioned table. By default, a date-paritioned table is created with
+    fields = [{
+        'name': field_name,
+        'type': field_type,
+        'description': field_description
+    } for (field_name, field_type, field_description) in table_schema]
+    return create_table2(big_query, project_id, dataset_id, table_id, fields,
+                         description)
+
+
+def create_partitioned_table(big_query,
+                             project_id,
+                             dataset_id,
+                             table_id,
+                             table_schema,
+                             description,
+                             partition_type='DAY',
+                             expiration_ms=_EXPIRATION_MS):
+    """Creates a partitioned table. By default, a date-paritioned table is created with
   each partition lasting 30 days after it was last modified.
   """
-  fields = [{'name': field_name,
-             'type': field_type,
-             'description': field_description
-             } for (field_name, field_type, field_description) in table_schema]
-  return create_table2(big_query, project_id, dataset_id, table_id,
-                       fields, description, partition_type, expiration_ms)
-
-
-def create_table2(big_query, project_id, dataset_id, table_id, fields_schema,
-                 description, partition_type=None, expiration_ms=None):
-  is_success = True
-
-  body = {
-      'description': description,
-      'schema': {
-          'fields': fields_schema
-      },
-      'tableReference': {
-          'datasetId': dataset_id,
-          'projectId': project_id,
-          'tableId': table_id
-      }
-  }
-
-  if partition_type and expiration_ms:
-    body["timePartitioning"] = {
-      "type": partition_type,
-      "expirationMs": expiration_ms
+    fields = [{
+        'name': field_name,
+        'type': field_type,
+        'description': field_description
+    } for (field_name, field_type, field_description) in table_schema]
+    return create_table2(big_query, project_id, dataset_id, table_id, fields,
+                         description, partition_type, expiration_ms)
+
+
+def create_table2(big_query,
+                  project_id,
+                  dataset_id,
+                  table_id,
+                  fields_schema,
+                  description,
+                  partition_type=None,
+                  expiration_ms=None):
+    is_success = True
+
+    body = {
+        'description': description,
+        'schema': {
+            'fields': fields_schema
+        },
+        'tableReference': {
+            'datasetId': dataset_id,
+            'projectId': project_id,
+            'tableId': table_id
+        }
     }
 
-  try:
-    table_req = big_query.tables().insert(projectId=project_id,
-                                          datasetId=dataset_id,
-                                          body=body)
-    res = table_req.execute(num_retries=NUM_RETRIES)
-    print 'Successfully created %s "%s"' % (res['kind'], res['id'])
-  except HttpError as http_error:
-    if http_error.resp.status == 409:
-      print 'Warning: Table %s already exists' % table_id
-    else:
-      print 'Error in creating table: %s. Err: %s' % (table_id, http_error)
-      is_success = False
-  return is_success
+    if partition_type and expiration_ms:
+        body["timePartitioning"] = {
+            "type": partition_type,
+            "expirationMs": expiration_ms
+        }
+
+    try:
+        table_req = big_query.tables().insert(
+            projectId=project_id, datasetId=dataset_id, body=body)
+        res = table_req.execute(num_retries=NUM_RETRIES)
+        print 'Successfully created %s "%s"' % (res['kind'], res['id'])
+    except HttpError as http_error:
+        if http_error.resp.status == 409:
+            print 'Warning: Table %s already exists' % table_id
+        else:
+            print 'Error in creating table: %s. Err: %s' % (table_id,
+                                                            http_error)
+            is_success = False
+    return is_success
 
 
 def patch_table(big_query, project_id, dataset_id, table_id, fields_schema):
-  is_success = True
-
-  body = {
-      'schema': {
-          'fields': fields_schema
-      },
-      'tableReference': {
-          'datasetId': dataset_id,
-          'projectId': project_id,
-          'tableId': table_id
-      }
-  }
-
-  try:
-    table_req = big_query.tables().patch(projectId=project_id,
-                                         datasetId=dataset_id,
-                                         tableId=table_id,
-                                         body=body)
-    res = table_req.execute(num_retries=NUM_RETRIES)
-    print 'Successfully patched %s "%s"' % (res['kind'], res['id'])
-  except HttpError as http_error:
-    print 'Error in creating table: %s. Err: %s' % (table_id, http_error)
-    is_success = False
-  return is_success
+    is_success = True
+
+    body = {
+        'schema': {
+            'fields': fields_schema
+        },
+        'tableReference': {
+            'datasetId': dataset_id,
+            'projectId': project_id,
+            'tableId': table_id
+        }
+    }
+
+    try:
+        table_req = big_query.tables().patch(
+            projectId=project_id,
+            datasetId=dataset_id,
+            tableId=table_id,
+            body=body)
+        res = table_req.execute(num_retries=NUM_RETRIES)
+        print 'Successfully patched %s "%s"' % (res['kind'], res['id'])
+    except HttpError as http_error:
+        print 'Error in creating table: %s. Err: %s' % (table_id, http_error)
+        is_success = False
+    return is_success
 
 
 def insert_rows(big_query, project_id, dataset_id, table_id, rows_list):
-  is_success = True
-  body = {'rows': rows_list}
-  try:
-    insert_req = big_query.tabledata().insertAll(projectId=project_id,
-                                                 datasetId=dataset_id,
-                                                 tableId=table_id,
-                                                 body=body)
-    res = insert_req.execute(num_retries=NUM_RETRIES)
-    if res.get('insertErrors', None):
-      print 'Error inserting rows! Response: %s' % res
-      is_success = False
-  except HttpError as http_error:
-    print 'Error inserting rows to the table %s' % table_id
-    is_success = False
-
-  return is_success
+    is_success = True
+    body = {'rows': rows_list}
+    try:
+        insert_req = big_query.tabledata().insertAll(
+            projectId=project_id,
+            datasetId=dataset_id,
+            tableId=table_id,
+            body=body)
+        res = insert_req.execute(num_retries=NUM_RETRIES)
+        if res.get('insertErrors', None):
+            print 'Error inserting rows! Response: %s' % res
+            is_success = False
+    except HttpError as http_error:
+        print 'Error inserting rows to the table %s' % table_id
+        is_success = False
+
+    return is_success
 
 
 def sync_query_job(big_query, project_id, query, timeout=5000):
-  query_data = {'query': query, 'timeoutMs': timeout}
-  query_job = None
-  try:
-    query_job = big_query.jobs().query(
-        projectId=project_id,
-        body=query_data).execute(num_retries=NUM_RETRIES)
-  except HttpError as http_error:
-    print 'Query execute job failed with error: %s' % http_error
-    print http_error.content
-  return query_job
-
-  # List of (column name, column type, description) tuples
+    query_data = {'query': query, 'timeoutMs': timeout}
+    query_job = None
+    try:
+        query_job = big_query.jobs().query(
+            projectId=project_id,
+            body=query_data).execute(num_retries=NUM_RETRIES)
+    except HttpError as http_error:
+        print 'Query execute job failed with error: %s' % http_error
+        print http_error.content
+    return query_job
+
+
+    # List of (column name, column type, description) tuples
 def make_row(unique_row_id, row_values_dict):
-  """row_values_dict is a dictionary of column name and column value.
+    """row_values_dict is a dictionary of column name and column value.
   """
-  return {'insertId': unique_row_id, 'json': row_values_dict}
+    return {'insertId': unique_row_id, 'json': row_values_dict}
diff --git a/tools/github/pr_latency.py b/tools/github/pr_latency.py
index 5d635835e5..0131e60bbc 100644
--- a/tools/github/pr_latency.py
+++ b/tools/github/pr_latency.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Measure the time between PR creation and completion of all tests.
 
 You'll need a github API token to avoid being rate-limited. See
@@ -46,118 +45,156 @@ COMMITS = 'https://api.github.com/repos/grpc/grpc/pulls/{pr_number}/commits'
 
 
 def gh(url):
-  request = urllib2.Request(url)
-  if TOKEN:
-    request.add_header('Authorization', 'token {}'.format(TOKEN))
-  response = urllib2.urlopen(request)
-  return response.read()
+    request = urllib2.Request(url)
+    if TOKEN:
+        request.add_header('Authorization', 'token {}'.format(TOKEN))
+    response = urllib2.urlopen(request)
+    return response.read()
 
 
 def print_csv_header():
-  print('pr,base_time,test_time,latency_seconds,successes,failures,errors')
-
-
-def output(pr, base_time, test_time, diff_time, successes, failures, errors, mode='human'):
-  if mode == 'human':
-    print("PR #{} base time: {} UTC, Tests completed at: {} UTC. Latency: {}."
-          "\n\tSuccesses: {}, Failures: {}, Errors: {}".format(
-              pr, base_time, test_time, diff_time, successes, failures, errors))
-  elif mode == 'csv':
-    print(','.join([str(pr), str(base_time),
-                    str(test_time), str(int((test_time-base_time).total_seconds())),
-                    str(successes), str(failures), str(errors)]))
+    print('pr,base_time,test_time,latency_seconds,successes,failures,errors')
+
+
+def output(pr,
+           base_time,
+           test_time,
+           diff_time,
+           successes,
+           failures,
+           errors,
+           mode='human'):
+    if mode == 'human':
+        print(
+            "PR #{} base time: {} UTC, Tests completed at: {} UTC. Latency: {}."
+            "\n\tSuccesses: {}, Failures: {}, Errors: {}".format(
+                pr, base_time, test_time, diff_time, successes, failures,
+                errors))
+    elif mode == 'csv':
+        print(','.join([
+            str(pr), str(base_time), str(test_time), str(
+                int((test_time - base_time).total_seconds())), str(successes),
+            str(failures), str(errors)
+        ]))
 
 
 def parse_timestamp(datetime_str):
-  return datetime.strptime(datetime_str, '%Y-%m-%dT%H:%M:%SZ')
+    return datetime.strptime(datetime_str, '%Y-%m-%dT%H:%M:%SZ')
 
 
 def to_posix_timestamp(dt):
-  return str((dt - datetime(1970, 1, 1)).total_seconds())
+    return str((dt - datetime(1970, 1, 1)).total_seconds())
 
 
 def get_pr_data():
-  latest_prs = json.loads(gh(PRS))
-  res =  [{'number': pr['number'],
-           'created_at': parse_timestamp(pr['created_at']),
-           'updated_at': parse_timestamp(pr['updated_at']),
-           'statuses_url': pr['statuses_url']}
-          for pr in latest_prs]
-  return res
+    latest_prs = json.loads(gh(PRS))
+    res = [{
+        'number': pr['number'],
+        'created_at': parse_timestamp(pr['created_at']),
+        'updated_at': parse_timestamp(pr['updated_at']),
+        'statuses_url': pr['statuses_url']
+    } for pr in latest_prs]
+    return res
 
 
 def get_commits_data(pr_number):
-  commits = json.loads(gh(COMMITS.format(pr_number=pr_number)))
-  return {'num_commits': len(commits),
-          'most_recent_date': parse_timestamp(commits[-1]['commit']['author']['date'])}
+    commits = json.loads(gh(COMMITS.format(pr_number=pr_number)))
+    return {
+        'num_commits': len(commits),
+        'most_recent_date':
+        parse_timestamp(commits[-1]['commit']['author']['date'])
+    }
 
 
 def get_status_data(statuses_url, system):
-  status_url = statuses_url.replace('statuses', 'status')
-  statuses = json.loads(gh(status_url + '?per_page=100'))
-  successes = 0
-  failures = 0
-  errors = 0
-  latest_datetime = None
-  if not statuses: return None
-  if system == 'kokoro': string_in_target_url = 'kokoro'
-  elif system == 'jenkins': string_in_target_url = 'grpc-testing'
-  for status in statuses['statuses']:
-    if not status['target_url'] or string_in_target_url not in status['target_url']: continue  # Ignore jenkins
-    if status['state'] == 'pending': return None
-    elif status['state'] == 'success': successes += 1
-    elif status['state'] == 'failure': failures += 1
-    elif status['state'] == 'error': errors += 1
-    if not latest_datetime:
-      latest_datetime = parse_timestamp(status['updated_at'])
-    else:
-      latest_datetime = max(latest_datetime, parse_timestamp(status['updated_at']))
-  # First status is the most recent one.
-  if any([successes, failures, errors]) and sum([successes, failures, errors]) > 15:
-    return {'latest_datetime': latest_datetime,
+    status_url = statuses_url.replace('statuses', 'status')
+    statuses = json.loads(gh(status_url + '?per_page=100'))
+    successes = 0
+    failures = 0
+    errors = 0
+    latest_datetime = None
+    if not statuses: return None
+    if system == 'kokoro': string_in_target_url = 'kokoro'
+    elif system == 'jenkins': string_in_target_url = 'grpc-testing'
+    for status in statuses['statuses']:
+        if not status['target_url'] or string_in_target_url not in status[
+                'target_url']:
+            continue  # Ignore jenkins
+        if status['state'] == 'pending': return None
+        elif status['state'] == 'success': successes += 1
+        elif status['state'] == 'failure': failures += 1
+        elif status['state'] == 'error': errors += 1
+        if not latest_datetime:
+            latest_datetime = parse_timestamp(status['updated_at'])
+        else:
+            latest_datetime = max(latest_datetime,
+                                  parse_timestamp(status['updated_at']))
+    # First status is the most recent one.
+    if any([successes, failures, errors]) and sum(
+        [successes, failures, errors]) > 15:
+        return {
+            'latest_datetime': latest_datetime,
             'successes': successes,
             'failures': failures,
-            'errors': errors}
-  else: return None
+            'errors': errors
+        }
+    else:
+        return None
 
 
 def build_args_parser():
-  import argparse
-  parser = argparse.ArgumentParser()
-  parser.add_argument('--format', type=str, choices=['human', 'csv'],
-                      default='human',
-                      help='Output format: are you a human or a machine?')
-  parser.add_argument('--system', type=str, choices=['jenkins', 'kokoro'],
-                      required=True, help='Consider only the given CI system')
-  parser.add_argument('--token', type=str, default='',
-                      help='GitHub token to use its API with a higher rate limit')
-  return parser
+    import argparse
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        '--format',
+        type=str,
+        choices=['human', 'csv'],
+        default='human',
+        help='Output format: are you a human or a machine?')
+    parser.add_argument(
+        '--system',
+        type=str,
+        choices=['jenkins', 'kokoro'],
+        required=True,
+        help='Consider only the given CI system')
+    parser.add_argument(
+        '--token',
+        type=str,
+        default='',
+        help='GitHub token to use its API with a higher rate limit')
+    return parser
 
 
 def main():
-  import sys
-  global TOKEN
-  args_parser = build_args_parser()
-  args = args_parser.parse_args()
-  TOKEN = args.token
-  if args.format == 'csv': print_csv_header()
-  for pr_data in get_pr_data():
-    commit_data = get_commits_data(pr_data['number'])
-    # PR with a single commit -> use the PRs creation time.
-    # else -> use the latest commit's date.
-    base_timestamp = pr_data['updated_at']
-    if commit_data['num_commits'] > 1:
-      base_timestamp = commit_data['most_recent_date']
-    else:
-      base_timestamp = pr_data['created_at']
-    last_status = get_status_data(pr_data['statuses_url'], args.system)
-    if last_status:
-      diff = last_status['latest_datetime'] - base_timestamp
-      if diff < timedelta(hours=5):
-        output(pr_data['number'], base_timestamp, last_status['latest_datetime'],
-               diff, last_status['successes'], last_status['failures'],
-               last_status['errors'], mode=args.format)
+    import sys
+    global TOKEN
+    args_parser = build_args_parser()
+    args = args_parser.parse_args()
+    TOKEN = args.token
+    if args.format == 'csv': print_csv_header()
+    for pr_data in get_pr_data():
+        commit_data = get_commits_data(pr_data['number'])
+        # PR with a single commit -> use the PRs creation time.
+        # else -> use the latest commit's date.
+        base_timestamp = pr_data['updated_at']
+        if commit_data['num_commits'] > 1:
+            base_timestamp = commit_data['most_recent_date']
+        else:
+            base_timestamp = pr_data['created_at']
+        last_status = get_status_data(pr_data['statuses_url'], args.system)
+        if last_status:
+            diff = last_status['latest_datetime'] - base_timestamp
+            if diff < timedelta(hours=5):
+                output(
+                    pr_data['number'],
+                    base_timestamp,
+                    last_status['latest_datetime'],
+                    diff,
+                    last_status['successes'],
+                    last_status['failures'],
+                    last_status['errors'],
+                    mode=args.format)
 
 
 if __name__ == '__main__':
-  main()
+    main()
diff --git a/tools/internal_ci/linux/grpc_bazel_on_foundry.sh b/tools/internal_ci/linux/grpc_bazel_on_foundry_dbg.sh
index e328be8aab..c43ac0e708 100644
--- a/tools/internal_ci/linux/grpc_bazel_on_foundry.sh
+++ b/tools/internal_ci/linux/grpc_bazel_on_foundry_dbg.sh
@@ -52,4 +52,5 @@ source tools/internal_ci/helper_scripts/prepare_build_linux_rc
   --experimental_remote_platform_override='properties:{name:"container-image" value:"docker://gcr.io/asci-toolchain/nosla-debian8-clang-fl@sha256:aa20628a902f06a11a015caa94b0432eb60690de2d2525bd046b9eea046f5d8a" }' \
   --crosstool_top=@bazel_toolchains//configs/debian8_clang/0.2.0/bazel_0.7.0:toolchain \
   --define GRPC_PORT_ISOLATED_RUNTIME=1 \
+  -c dbg \
   -- //test/...
diff --git a/tools/internal_ci/linux/grpc_bazel_on_foundry_opt.sh b/tools/internal_ci/linux/grpc_bazel_on_foundry_opt.sh
new file mode 100644
index 0000000000..b106b71a85
--- /dev/null
+++ b/tools/internal_ci/linux/grpc_bazel_on_foundry_opt.sh
@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -ex
+
+# A temporary solution to give Kokoro credentials. 
+# The file name 4321_grpc-testing-service needs to match auth_credential in 
+# the build config.
+mkdir -p ${KOKORO_KEYSTORE_DIR}
+cp ${KOKORO_GFILE_DIR}/GrpcTesting-d0eeee2db331.json ${KOKORO_KEYSTORE_DIR}/4321_grpc-testing-service
+
+mkdir -p /tmpfs/tmp/bazel-canary
+ln -f "${KOKORO_GFILE_DIR}/bazel-canary" /tmpfs/tmp/bazel-canary/bazel
+chmod 755 "${KOKORO_GFILE_DIR}/bazel-canary"
+export PATH="/tmpfs/tmp/bazel-canary:${PATH}"
+# This should show /tmpfs/tmp/bazel-canary/bazel
+which bazel
+chmod +x "${KOKORO_GFILE_DIR}/bazel_wrapper.py"
+
+# change to grpc repo root
+cd $(dirname $0)/../../..
+
+source tools/internal_ci/helper_scripts/prepare_build_linux_rc
+
+"${KOKORO_GFILE_DIR}/bazel_wrapper.py" \
+  --host_jvm_args=-Dbazel.DigestFunction=SHA1 \
+  test --jobs="50" \
+  --test_timeout="300,450,1200,3600" \
+  --test_output=errors  \
+  --verbose_failures=true  \
+  --keep_going  \
+  --remote_accept_cached=true  \
+  --spawn_strategy=remote  \
+  --remote_local_fallback=false  \
+  --remote_timeout=3600  \
+  --strategy=Javac=remote  \
+  --strategy=Closure=remote  \
+  --genrule_strategy=remote  \
+  --experimental_strict_action_env=true \
+  --experimental_remote_platform_override='properties:{name:"container-image" value:"docker://gcr.io/asci-toolchain/nosla-debian8-clang-fl@sha256:aa20628a902f06a11a015caa94b0432eb60690de2d2525bd046b9eea046f5d8a" }' \
+  --crosstool_top=@bazel_toolchains//configs/debian8_clang/0.2.0/bazel_0.7.0:toolchain \
+  --define GRPC_PORT_ISOLATED_RUNTIME=1 \
+  -c opt \
+  -- //test/...
diff --git a/tools/interop_matrix/client_matrix.py b/tools/interop_matrix/client_matrix.py
index c9a4996029..f32bdf8b15 100644
--- a/tools/interop_matrix/client_matrix.py
+++ b/tools/interop_matrix/client_matrix.py
@@ -15,17 +15,34 @@
 
 # Dictionaries used for client matrix testing.
 
+
 def get_github_repo(lang):
-  return {
-      'go': 'git@github.com:grpc/grpc-go.git',
-      'java': 'git@github.com:grpc/grpc-java.git',
-      'node': 'git@github.com:grpc/grpc-node.git',
-      # all other languages use the grpc.git repo.
-  }.get(lang, 'git@github.com:grpc/grpc.git')
+    return {
+        'go': 'git@github.com:grpc/grpc-go.git',
+        'java': 'git@github.com:grpc/grpc-java.git',
+        'node': 'git@github.com:grpc/grpc-node.git',
+        # all other languages use the grpc.git repo.
+    }.get(lang, 'git@github.com:grpc/grpc.git')
+
+
+def get_release_tags(lang):
+    return map(lambda r: get_release_tag_name(r), LANG_RELEASE_MATRIX[lang])
+
+
+def get_release_tag_name(release_info):
+    assert len(release_info.keys()) == 1
+    return release_info.keys()[0]
+
+
+def should_build_docker_interop_image_from_release_tag(lang):
+    if lang in ['go', 'java', 'node']:
+        return False
+    return True
+
 
 # Dictionary of runtimes per language
 LANG_RUNTIME_MATRIX = {
-    'cxx': ['cxx'],             # This is actually debian8.
+    'cxx': ['cxx'],  # This is actually debian8.
     'go': ['go1.7', 'go1.8'],
     'java': ['java_oracle8'],
     'python': ['python'],
@@ -39,81 +56,197 @@ LANG_RUNTIME_MATRIX = {
 # a release tag pointing to the latest build of the branch.
 LANG_RELEASE_MATRIX = {
     'cxx': [
-        'v1.0.1',
-        'v1.1.4',
-        'v1.2.5',
-        'v1.3.9',
-        'v1.4.2',
-        'v1.6.6',
-        'v1.7.2',
+        {
+            'v1.0.1': None
+        },
+        {
+            'v1.1.4': None
+        },
+        {
+            'v1.2.5': None
+        },
+        {
+            'v1.3.9': None
+        },
+        {
+            'v1.4.2': None
+        },
+        {
+            'v1.6.6': None
+        },
+        {
+            'v1.7.2': None
+        },
     ],
     'go': [
-        'v1.0.5',
-        'v1.2.1',
-        'v1.3.0',
-        'v1.4.2',
-        'v1.5.2',
-        'v1.6.0',
-        'v1.7.0',
-        'v1.7.1',
-        'v1.7.2',
-        'v1.7.3',
-        'v1.8.0',
+        {
+            'v1.0.5': None
+        },
+        {
+            'v1.2.1': None
+        },
+        {
+            'v1.3.0': None
+        },
+        {
+            'v1.4.2': None
+        },
+        {
+            'v1.5.2': None
+        },
+        {
+            'v1.6.0': None
+        },
+        {
+            'v1.7.4': None
+        },
+        {
+            'v1.8.1': None
+        },
     ],
     'java': [
-        'v1.0.3',
-        'v1.1.2',
-        'v1.2.0',
-        'v1.3.1',
-        'v1.4.0',
-        'v1.5.0',
-        'v1.6.1',
-        'v1.7.0',
-        'v1.8.0',
+        {
+            'v1.0.3': None
+        },
+        {
+            'v1.1.2': None
+        },
+        {
+            'v1.2.0': None
+        },
+        {
+            'v1.3.1': None
+        },
+        {
+            'v1.4.0': None
+        },
+        {
+            'v1.5.0': None
+        },
+        {
+            'v1.6.1': None
+        },
+        {
+            'v1.7.0': None
+        },
+        {
+            'v1.8.0': None
+        },
     ],
     'python': [
-        'v1.0.x',
-        'v1.1.4',
-        'v1.2.5',
-        'v1.3.9',
-        'v1.4.2',
-        'v1.6.6',
-        'v1.7.2',    
+        {
+            'v1.0.x': None
+        },
+        {
+            'v1.1.4': None
+        },
+        {
+            'v1.2.5': None
+        },
+        {
+            'v1.3.9': None
+        },
+        {
+            'v1.4.2': None
+        },
+        {
+            'v1.6.6': None
+        },
+        {
+            'v1.7.2': None
+        },
     ],
     'node': [
-        'v1.0.1',
-        'v1.1.4',
-        'v1.2.5',
-        'v1.3.9',
-        'v1.4.2',
-        'v1.6.6',
-        #'v1.7.1',  Failing tests.
+        {
+            'v1.0.1': None
+        },
+        {
+            'v1.1.4': None
+        },
+        {
+            'v1.2.5': None
+        },
+        {
+            'v1.3.9': None
+        },
+        {
+            'v1.4.2': None
+        },
+        {
+            'v1.6.6': None
+        },
+        #{'v1.7.1': None}, Failing tests
     ],
     'ruby': [
-        # Ruby v1.0.x doesn't have the fix #8914, therefore not supported.
-        'v1.1.4',
-        'v1.2.5',
-        'v1.3.9',
-        'v1.4.2',
-        'v1.6.6',
-        'v1.7.2',
+        {
+            'v1.0.1': {
+                'patch': [
+                    'tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile',
+                    'tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh',
+                ]
+            }
+        },
+        {
+            'v1.1.4': None
+        },
+        {
+            'v1.2.5': None
+        },
+        {
+            'v1.3.9': None
+        },
+        {
+            'v1.4.2': None
+        },
+        {
+            'v1.6.6': None
+        },
+        {
+            'v1.7.2': None
+        },
     ],
     'php': [
-        'v1.0.1',
-        'v1.1.4',
-        'v1.2.5',
-        'v1.3.9',
-        'v1.4.2',
-        'v1.6.6',
-        'v1.7.2',
+        {
+            'v1.0.1': None
+        },
+        {
+            'v1.1.4': None
+        },
+        {
+            'v1.2.5': None
+        },
+        {
+            'v1.3.9': None
+        },
+        {
+            'v1.4.2': None
+        },
+        {
+            'v1.6.6': None
+        },
+        {
+            'v1.7.2': None
+        },
     ],
-   'csharp': [
-        #'v1.0.1',
-        'v1.1.4',
-        'v1.2.5',
-        'v1.3.9',
-        'v1.4.2',
-        'v1.6.6',
-        'v1.7.2',
+    'csharp': [
+        #{'v1.0.1': None},
+        {
+            'v1.1.4': None
+        },
+        {
+            'v1.2.5': None
+        },
+        {
+            'v1.3.9': None
+        },
+        {
+            'v1.4.2': None
+        },
+        {
+            'v1.6.6': None
+        },
+        {
+            'v1.7.2': None
+        },
     ],
 }
diff --git a/tools/interop_matrix/create_matrix_images.py b/tools/interop_matrix/create_matrix_images.py
index 493a7d5364..67dfce9c9a 100755
--- a/tools/interop_matrix/create_matrix_images.py
+++ b/tools/interop_matrix/create_matrix_images.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Build and upload docker images to Google Container Registry per matrix."""
 
 from __future__ import print_function
@@ -29,8 +28,8 @@ import tempfile
 # Langauage Runtime Matrix
 import client_matrix
 
-python_util_dir = os.path.abspath(os.path.join(
-    os.path.dirname(__file__), '../run_tests/python_utils'))
+python_util_dir = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), '../run_tests/python_utils'))
 sys.path.append(python_util_dir)
 import dockerjob
 import jobset
@@ -38,236 +37,304 @@ import jobset
 _IMAGE_BUILDER = 'tools/run_tests/dockerize/build_interop_image.sh'
 _LANGUAGES = client_matrix.LANG_RUNTIME_MATRIX.keys()
 # All gRPC release tags, flattened, deduped and sorted.
-_RELEASES = sorted(list(set(
-    i for l in client_matrix.LANG_RELEASE_MATRIX.values() for i in l)))
+_RELEASES = sorted(
+    list(
+        set(
+            client_matrix.get_release_tag_name(info)
+            for lang in client_matrix.LANG_RELEASE_MATRIX.values()
+            for info in lang)))
 
 # Destination directory inside docker image to keep extra info from build time.
 _BUILD_INFO = '/var/local/build_info'
 
 argp = argparse.ArgumentParser(description='Run interop tests.')
-argp.add_argument('--gcr_path',
-                  default='gcr.io/grpc-testing',
-                  help='Path of docker images in Google Container Registry')
-
-argp.add_argument('--release',
-                  default='master',
-                  choices=['all', 'master'] + _RELEASES,
-                  help='github commit tag to checkout.  When building all '
-                  'releases defined in client_matrix.py, use "all". Valid only '
-                  'with --git_checkout.')
-
-argp.add_argument('-l', '--language',
-                  choices=['all'] + sorted(_LANGUAGES),
-                  nargs='+',
-                  default=['all'],
-                  help='Test languages to build docker images for.')
-
-argp.add_argument('--git_checkout',
-                  action='store_true',
-                  help='Use a separate git clone tree for building grpc stack. '
-                  'Required when using --release flag.  By default, current'
-                  'tree and the sibling will be used for building grpc stack.')
-
-argp.add_argument('--git_checkout_root',
-                  default='/export/hda3/tmp/grpc_matrix',
-                  help='Directory under which grpc-go/java/main repo will be '
-                  'cloned.  Valid only with --git_checkout.')
-
-argp.add_argument('--keep',
-                  action='store_true',
-                  help='keep the created local images after uploading to GCR')
-
-argp.add_argument('--reuse_git_root',
-                  default=False,
-                  action='store_const',
-                  const=True,                  
-                  help='reuse the repo dir. If False, the existing git root '
-                  'directory will removed before a clean checkout, because '
-                  'reusing the repo can cause git checkout error if you switch '
-                  'between releases.')
-
+argp.add_argument(
+    '--gcr_path',
+    default='gcr.io/grpc-testing',
+    help='Path of docker images in Google Container Registry')
+
+argp.add_argument(
+    '--release',
+    default='master',
+    choices=['all', 'master'] + _RELEASES,
+    help='github commit tag to checkout.  When building all '
+    'releases defined in client_matrix.py, use "all". Valid only '
+    'with --git_checkout.')
+
+argp.add_argument(
+    '-l',
+    '--language',
+    choices=['all'] + sorted(_LANGUAGES),
+    nargs='+',
+    default=['all'],
+    help='Test languages to build docker images for.')
+
+argp.add_argument(
+    '--git_checkout',
+    action='store_true',
+    help='Use a separate git clone tree for building grpc stack. '
+    'Required when using --release flag.  By default, current'
+    'tree and the sibling will be used for building grpc stack.')
+
+argp.add_argument(
+    '--git_checkout_root',
+    default='/export/hda3/tmp/grpc_matrix',
+    help='Directory under which grpc-go/java/main repo will be '
+    'cloned.  Valid only with --git_checkout.')
+
+argp.add_argument(
+    '--keep',
+    action='store_true',
+    help='keep the created local images after uploading to GCR')
+
+argp.add_argument(
+    '--reuse_git_root',
+    default=False,
+    action='store_const',
+    const=True,
+    help='reuse the repo dir. If False, the existing git root '
+    'directory will removed before a clean checkout, because '
+    'reusing the repo can cause git checkout error if you switch '
+    'between releases.')
 
 args = argp.parse_args()
 
+
 def add_files_to_image(image, with_files, label=None):
-  """Add files to a docker image.
+    """Add files to a docker image.
 
   image: docker image name, i.e. grpc_interop_java:26328ad8
   with_files: additional files to include in the docker image.
   label: label string to attach to the image.
   """
-  tag_idx = image.find(':')
-  if tag_idx == -1:
-    jobset.message('FAILED', 'invalid docker image %s' % image, do_newline=True)
-    sys.exit(1)
-  orig_tag = '%s_' % image
-  subprocess.check_output(['docker', 'tag', image, orig_tag])
-
-  lines = ['FROM ' + orig_tag]
-  if label:
-    lines.append('LABEL %s' % label)
-
-  temp_dir = tempfile.mkdtemp()
-  atexit.register(lambda: subprocess.call(['rm', '-rf', temp_dir]))
-
-  # Copy with_files inside the tmp directory, which will be the docker build
-  # context.
-  for f in with_files:
-    shutil.copy(f, temp_dir)
-    lines.append('COPY %s %s/' % (os.path.basename(f), _BUILD_INFO))
-
-  # Create a Dockerfile.
-  with open(os.path.join(temp_dir, 'Dockerfile'), 'w') as f:
-    f.write('\n'.join(lines))
-
-  jobset.message('START', 'Repackaging %s' % image, do_newline=True)
-  build_cmd = ['docker', 'build', '--rm', '--tag', image, temp_dir]
-  subprocess.check_output(build_cmd)
-  dockerjob.remove_image(orig_tag, skip_nonexistent=True)
+    tag_idx = image.find(':')
+    if tag_idx == -1:
+        jobset.message(
+            'FAILED', 'invalid docker image %s' % image, do_newline=True)
+        sys.exit(1)
+    orig_tag = '%s_' % image
+    subprocess.check_output(['docker', 'tag', image, orig_tag])
+
+    lines = ['FROM ' + orig_tag]
+    if label:
+        lines.append('LABEL %s' % label)
+
+    temp_dir = tempfile.mkdtemp()
+    atexit.register(lambda: subprocess.call(['rm', '-rf', temp_dir]))
+
+    # Copy with_files inside the tmp directory, which will be the docker build
+    # context.
+    for f in with_files:
+        shutil.copy(f, temp_dir)
+        lines.append('COPY %s %s/' % (os.path.basename(f), _BUILD_INFO))
+
+    # Create a Dockerfile.
+    with open(os.path.join(temp_dir, 'Dockerfile'), 'w') as f:
+        f.write('\n'.join(lines))
+
+    jobset.message('START', 'Repackaging %s' % image, do_newline=True)
+    build_cmd = ['docker', 'build', '--rm', '--tag', image, temp_dir]
+    subprocess.check_output(build_cmd)
+    dockerjob.remove_image(orig_tag, skip_nonexistent=True)
+
 
 def build_image_jobspec(runtime, env, gcr_tag, stack_base):
-  """Build interop docker image for a language with runtime.
+    """Build interop docker image for a language with runtime.
 
   runtime: a <lang><version> string, for example go1.8.
   env:     dictionary of env to passed to the build script.
   gcr_tag: the tag for the docker image (i.e. v1.3.0).
   stack_base: the local gRPC repo path.
   """
-  basename = 'grpc_interop_%s' % runtime
-  tag = '%s/%s:%s' % (args.gcr_path, basename, gcr_tag)
-  build_env = {
-      'INTEROP_IMAGE': tag,
-      'BASE_NAME': basename,
-      'TTY_FLAG': '-t'
-  }
-  build_env.update(env)
-  build_job = jobset.JobSpec(
-          cmdline=[_IMAGE_BUILDER],
-          environ=build_env,
-          shortname='build_docker_%s' % runtime,
-          timeout_seconds=30*60)
-  build_job.tag = tag
-  return build_job
+    basename = 'grpc_interop_%s' % runtime
+    tag = '%s/%s:%s' % (args.gcr_path, basename, gcr_tag)
+    build_env = {'INTEROP_IMAGE': tag, 'BASE_NAME': basename, 'TTY_FLAG': '-t'}
+    build_env.update(env)
+    image_builder_path = _IMAGE_BUILDER
+    if client_matrix.should_build_docker_interop_image_from_release_tag(lang):
+        image_builder_path = os.path.join(stack_base, _IMAGE_BUILDER)
+    build_job = jobset.JobSpec(
+        cmdline=[image_builder_path],
+        environ=build_env,
+        shortname='build_docker_%s' % runtime,
+        timeout_seconds=30 * 60)
+    build_job.tag = tag
+    return build_job
+
 
 def build_all_images_for_lang(lang):
-  """Build all docker images for a language across releases and runtimes."""
-  if not args.git_checkout:
-    if args.release != 'master':
-      print('WARNING: --release is set but will be ignored\n')
-    releases = ['master']
-  else:
-    if args.release == 'all':
-      releases = client_matrix.LANG_RELEASE_MATRIX[lang]
+    """Build all docker images for a language across releases and runtimes."""
+    if not args.git_checkout:
+        if args.release != 'master':
+            print('WARNING: --release is set but will be ignored\n')
+        releases = ['master']
     else:
-      # Build a particular release.
-      if args.release not in ['master'] + client_matrix.LANG_RELEASE_MATRIX[lang]:
-        jobset.message('SKIPPED',
-                       '%s for %s is not defined' % (args.release, lang),
-                       do_newline=True)
-        return []
-      releases = [args.release]
-
-  images = []
-  for release in releases:
-    images += build_all_images_for_release(lang, release)
-  jobset.message('SUCCESS',
-                 'All docker images built for %s at %s.' % (lang, releases),
-                 do_newline=True)
-  return images
+        if args.release == 'all':
+            releases = client_matrix.get_release_tags(lang)
+        else:
+            # Build a particular release.
+            if args.release not in ['master'] + client_matrix.get_release_tags(
+                    lang):
+                jobset.message(
+                    'SKIPPED',
+                    '%s for %s is not defined' % (args.release, lang),
+                    do_newline=True)
+                return []
+            releases = [args.release]
+
+    images = []
+    for release in releases:
+        images += build_all_images_for_release(lang, release)
+    jobset.message(
+        'SUCCESS',
+        'All docker images built for %s at %s.' % (lang, releases),
+        do_newline=True)
+    return images
+
 
 def build_all_images_for_release(lang, release):
-  """Build all docker images for a release across all runtimes."""
-  docker_images = []
-  build_jobs = []
-
-  env = {}
-  # If we not using current tree or the sibling for grpc stack, do checkout.
-  stack_base = ''
-  if args.git_checkout:
-    stack_base = checkout_grpc_stack(lang, release)
-    var ={'go': 'GRPC_GO_ROOT', 'java': 'GRPC_JAVA_ROOT', 'node': 'GRPC_NODE_ROOT'}.get(lang, 'GRPC_ROOT')
-    env[var] = stack_base
-
-  for runtime in client_matrix.LANG_RUNTIME_MATRIX[lang]:
-    job = build_image_jobspec(runtime, env, release, stack_base)
-    docker_images.append(job.tag)
-    build_jobs.append(job)
-
-  jobset.message('START', 'Building interop docker images.', do_newline=True)
-  print('Jobs to run: \n%s\n' % '\n'.join(str(j) for j in build_jobs))
-
-  num_failures, _ = jobset.run(
-      build_jobs, newline_on_success=True, maxjobs=multiprocessing.cpu_count())
-  if num_failures:
-    jobset.message('FAILED', 'Failed to build interop docker images.',
-                   do_newline=True)
-    docker_images_cleanup.extend(docker_images)
-    sys.exit(1)
-
-  jobset.message('SUCCESS',
-                 'All docker images built for %s at %s.' % (lang, release),
-                 do_newline=True)
-
-  if release != 'master':
-    commit_log = os.path.join(stack_base, 'commit_log')
-    if os.path.exists(commit_log):
-      for image in docker_images:
-        add_files_to_image(image, [commit_log], 'release=%s' % release)
-  return docker_images
+    """Build all docker images for a release across all runtimes."""
+    docker_images = []
+    build_jobs = []
+
+    env = {}
+    # If we not using current tree or the sibling for grpc stack, do checkout.
+    stack_base = ''
+    if args.git_checkout:
+        stack_base = checkout_grpc_stack(lang, release)
+        var = {
+            'go': 'GRPC_GO_ROOT',
+            'java': 'GRPC_JAVA_ROOT',
+            'node': 'GRPC_NODE_ROOT'
+        }.get(lang, 'GRPC_ROOT')
+        env[var] = stack_base
+
+    for runtime in client_matrix.LANG_RUNTIME_MATRIX[lang]:
+        job = build_image_jobspec(runtime, env, release, stack_base)
+        docker_images.append(job.tag)
+        build_jobs.append(job)
+
+    jobset.message('START', 'Building interop docker images.', do_newline=True)
+    print('Jobs to run: \n%s\n' % '\n'.join(str(j) for j in build_jobs))
+
+    num_failures, _ = jobset.run(
+        build_jobs,
+        newline_on_success=True,
+        maxjobs=multiprocessing.cpu_count())
+    if num_failures:
+        jobset.message(
+            'FAILED', 'Failed to build interop docker images.', do_newline=True)
+        docker_images_cleanup.extend(docker_images)
+        sys.exit(1)
+
+    jobset.message(
+        'SUCCESS',
+        'All docker images built for %s at %s.' % (lang, release),
+        do_newline=True)
+
+    if release != 'master':
+        commit_log = os.path.join(stack_base, 'commit_log')
+        if os.path.exists(commit_log):
+            for image in docker_images:
+                add_files_to_image(image, [commit_log], 'release=%s' % release)
+    return docker_images
+
 
 def cleanup():
-  if not args.keep:
-    for image in docker_images_cleanup:
-      dockerjob.remove_image(image, skip_nonexistent=True)
+    if not args.keep:
+        for image in docker_images_cleanup:
+            dockerjob.remove_image(image, skip_nonexistent=True)
+
 
 docker_images_cleanup = []
 atexit.register(cleanup)
 
+
+def maybe_apply_patches_on_git_tag(stack_base, lang, release):
+    files_to_patch = []
+    for release_info in client_matrix.LANG_RELEASE_MATRIX[lang]:
+        if client_matrix.get_release_tag_name(release_info) == release:
+            files_to_patch = release_info[release].get('patch')
+            break
+    if not files_to_patch:
+        return
+    patch_file_relative_path = 'patches/%s_%s/git_repo.patch' % (lang, release)
+    patch_file = os.path.abspath(
+        os.path.join(os.path.dirname(__file__), patch_file_relative_path))
+    if not os.path.exists(patch_file):
+        jobset.message('FAILED',
+                       'expected patch file |%s| to exist' % patch_file)
+        sys.exit(1)
+    subprocess.check_output(
+        ['git', 'apply', patch_file], cwd=stack_base, stderr=subprocess.STDOUT)
+    for repo_relative_path in files_to_patch:
+        subprocess.check_output(
+            ['git', 'add', repo_relative_path],
+            cwd=stack_base,
+            stderr=subprocess.STDOUT)
+    subprocess.check_output(
+        [
+            'git', 'commit', '-m',
+            ('Hack performed on top of %s git '
+             'tag in order to build and run the %s '
+             'interop tests on that tag.' % (lang, release))
+        ],
+        cwd=stack_base,
+        stderr=subprocess.STDOUT)
+
+
 def checkout_grpc_stack(lang, release):
-  """Invokes 'git check' for the lang/release and returns directory created."""
-  assert args.git_checkout and args.git_checkout_root
-
-  if not os.path.exists(args.git_checkout_root):
-    os.makedirs(args.git_checkout_root)
-
-  repo = client_matrix.get_github_repo(lang)
-  # Get the subdir name part of repo
-  # For example, 'git@github.com:grpc/grpc-go.git' should use 'grpc-go'.
-  repo_dir = os.path.splitext(os.path.basename(repo))[0]
-  stack_base = os.path.join(args.git_checkout_root, repo_dir)
-
-  # Clean up leftover repo dir if necessary.
-  if not args.reuse_git_root and os.path.exists(stack_base):
-    jobset.message('START', 'Removing git checkout root.', do_newline=True)
-    shutil.rmtree(stack_base)
-
-  if not os.path.exists(stack_base):
-    subprocess.check_call(['git', 'clone', '--recursive', repo],
-                          cwd=os.path.dirname(stack_base))
-
-  # git checkout.
-  jobset.message('START', 'git checkout %s from %s' % (release, stack_base),
-                 do_newline=True)
-  # We should NEVER do checkout on current tree !!!
-  assert not os.path.dirname(__file__).startswith(stack_base)
-  output = subprocess.check_output(
-      ['git', 'checkout', release], cwd=stack_base, stderr=subprocess.STDOUT)
-  commit_log = subprocess.check_output(['git', 'log', '-1'], cwd=stack_base)
-  jobset.message('SUCCESS', 'git checkout', 
-                 '%s: %s' % (str(output), commit_log), 
-                 do_newline=True)
-
-  # Write git log to commit_log so it can be packaged with the docker image.
-  with open(os.path.join(stack_base, 'commit_log'), 'w') as f:
-    f.write(commit_log)
-  return stack_base
+    """Invokes 'git check' for the lang/release and returns directory created."""
+    assert args.git_checkout and args.git_checkout_root
+
+    if not os.path.exists(args.git_checkout_root):
+        os.makedirs(args.git_checkout_root)
+
+    repo = client_matrix.get_github_repo(lang)
+    # Get the subdir name part of repo
+    # For example, 'git@github.com:grpc/grpc-go.git' should use 'grpc-go'.
+    repo_dir = os.path.splitext(os.path.basename(repo))[0]
+    stack_base = os.path.join(args.git_checkout_root, repo_dir)
+
+    # Clean up leftover repo dir if necessary.
+    if not args.reuse_git_root and os.path.exists(stack_base):
+        jobset.message('START', 'Removing git checkout root.', do_newline=True)
+        shutil.rmtree(stack_base)
+
+    if not os.path.exists(stack_base):
+        subprocess.check_call(
+            ['git', 'clone', '--recursive', repo],
+            cwd=os.path.dirname(stack_base))
+
+    # git checkout.
+    jobset.message(
+        'START',
+        'git checkout %s from %s' % (release, stack_base),
+        do_newline=True)
+    # We should NEVER do checkout on current tree !!!
+    assert not os.path.dirname(__file__).startswith(stack_base)
+    output = subprocess.check_output(
+        ['git', 'checkout', release], cwd=stack_base, stderr=subprocess.STDOUT)
+    maybe_apply_patches_on_git_tag(stack_base, lang, release)
+    commit_log = subprocess.check_output(['git', 'log', '-1'], cwd=stack_base)
+    jobset.message(
+        'SUCCESS',
+        'git checkout',
+        '%s: %s' % (str(output), commit_log),
+        do_newline=True)
+
+    # Write git log to commit_log so it can be packaged with the docker image.
+    with open(os.path.join(stack_base, 'commit_log'), 'w') as f:
+        f.write(commit_log)
+    return stack_base
+
 
 languages = args.language if args.language != ['all'] else _LANGUAGES
 for lang in languages:
-  docker_images = build_all_images_for_lang(lang)
-  for image in docker_images:
-    jobset.message('START', 'Uploading %s' % image, do_newline=True)
-    # docker image name must be in the format <gcr_path>/<image>:<gcr_tag>
-    assert image.startswith(args.gcr_path) and image.find(':') != -1
+    docker_images = build_all_images_for_lang(lang)
+    for image in docker_images:
+        jobset.message('START', 'Uploading %s' % image, do_newline=True)
+        # docker image name must be in the format <gcr_path>/<image>:<gcr_tag>
+        assert image.startswith(args.gcr_path) and image.find(':') != -1
 
-    subprocess.call(['gcloud', 'docker', '--', 'push', image])
+        subprocess.call(['gcloud', 'docker', '--', 'push', image])
diff --git a/tools/interop_matrix/patches/README.md b/tools/interop_matrix/patches/README.md
new file mode 100644
index 0000000000..0c0893f6f2
--- /dev/null
+++ b/tools/interop_matrix/patches/README.md
@@ -0,0 +1,38 @@
+# Patches to grpc repo tags for the backwards compatibility interop tests
+
+This directory has patch files that can be applied to different tags
+of the grpc git repo in order to run the interop tests for a specific
+language based on that tag.
+
+For example, because the ruby interop tests do not run on the v1.0.1 tag out
+of the box, but we still want to test compatibility of the 1.0.1 ruby release
+with other versions, we can apply a patch to the v1.0.1 tag from this directory
+that makes the necessary changes that are needed to run the ruby interop tests
+from that tag. We can then use that patch to build the docker image for the
+ruby v1.0.1 interop tests.
+
+## How to add a new patch to this directory
+
+Patch files in this directory are meant to be applied to a git tag
+with a `git apply` command.
+
+1. Under the `patches` directory, create a new subdirectory
+titled `<language>_<git_tag>` for the git tag being modified.
+
+2. `git checkout <git_tag>`
+
+3. Make necessary modifications to the git repo at that tag.
+
+4. 
+
+```
+git diff > ~/git_repo.patch
+git checkout <current working branch>
+cp ~/git_repo.patch tools/interop_matrix/patches/<language>_<git_tag>/
+```
+
+5. Edit the `LANGUAGE_RELEASE_MATRIX` in `client_matrix.py` for your language/tag
+and add a `'patch': [<files>,....]` entry to it's `dictionary`.
+
+After doing this, the interop image creation script can apply that patch to the
+tag with `git apply` before uploading to the test image repo.
diff --git a/tools/interop_matrix/patches/ruby_v1.0.1/git_repo.patch b/tools/interop_matrix/patches/ruby_v1.0.1/git_repo.patch
new file mode 100644
index 0000000000..0cd92d691d
--- /dev/null
+++ b/tools/interop_matrix/patches/ruby_v1.0.1/git_repo.patch
@@ -0,0 +1,34 @@
+diff --git a/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
+index 88b5130..7ae9f7d 100644
+--- a/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
++++ b/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
+@@ -70,12 +70,12 @@ RUN apt-get update && apt-get install -y time && apt-get clean
+ RUN gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
+ RUN \curl -sSL https://get.rvm.io | bash -s stable
+ 
+-# Install Ruby 2.1
+-RUN /bin/bash -l -c "rvm install ruby-2.1"
+-RUN /bin/bash -l -c "rvm use --default ruby-2.1"
++# Install Ruby 2.1.8
++RUN /bin/bash -l -c "rvm install ruby-2.1.8"
++RUN /bin/bash -l -c "rvm use --default ruby-2.1.8"
+ RUN /bin/bash -l -c "echo 'gem: --no-ri --no-rdoc' > ~/.gemrc"
+ RUN /bin/bash -l -c "echo 'export PATH=/usr/local/rvm/bin:$PATH' >> ~/.bashrc"
+-RUN /bin/bash -l -c "echo 'rvm --default use ruby-2.1' >> ~/.bashrc"
++RUN /bin/bash -l -c "echo 'rvm --default use ruby-2.1.8' >> ~/.bashrc"
+ RUN /bin/bash -l -c "gem install bundler --no-ri --no-rdoc"
+ 
+ # Prepare ccache
+diff --git a/tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh b/tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh
+index 97b3860..cec046d 100755
+--- a/tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh
++++ b/tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh
+@@ -38,7 +38,7 @@ git clone --recursive /var/local/jenkins/grpc /var/local/git/grpc
+ cp -r /var/local/jenkins/service_account $HOME || true
+ 
+ cd /var/local/git/grpc
+-rvm --default use ruby-2.1
++rvm --default use ruby-2.1.8
+ 
+ # build Ruby interop client and server
+ (cd src/ruby && gem update bundler && bundle && rake compile)
diff --git a/tools/interop_matrix/run_interop_matrix_tests.py b/tools/interop_matrix/run_interop_matrix_tests.py
index 4265bc5355..ff42bd77b0 100755
--- a/tools/interop_matrix/run_interop_matrix_tests.py
+++ b/tools/interop_matrix/run_interop_matrix_tests.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Run tests using docker images in Google Container Registry per matrix."""
 
 from __future__ import print_function
@@ -30,8 +29,8 @@ import uuid
 # Langauage Runtime Matrix
 import client_matrix
 
-python_util_dir = os.path.abspath(os.path.join(
-    os.path.dirname(__file__), '../run_tests/python_utils'))
+python_util_dir = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), '../run_tests/python_utils'))
 sys.path.append(python_util_dir)
 import dockerjob
 import jobset
@@ -40,46 +39,56 @@ import upload_test_results
 
 _LANGUAGES = client_matrix.LANG_RUNTIME_MATRIX.keys()
 # All gRPC release tags, flattened, deduped and sorted.
-_RELEASES = sorted(list(set(
-    i for l in client_matrix.LANG_RELEASE_MATRIX.values() for i in l)))
+_RELEASES = sorted(
+    list(
+        set(
+            client_matrix.get_release_tag_name(info)
+            for lang in client_matrix.LANG_RELEASE_MATRIX.values()
+            for info in lang)))
 _TEST_TIMEOUT = 30
 
 argp = argparse.ArgumentParser(description='Run interop tests.')
 argp.add_argument('-j', '--jobs', default=multiprocessing.cpu_count(), type=int)
-argp.add_argument('--gcr_path',
-                  default='gcr.io/grpc-testing',
-                  help='Path of docker images in Google Container Registry')
-argp.add_argument('--release',
-                  default='all',
-                  choices=['all', 'master'] + _RELEASES,
-                  help='Release tags to test.  When testing all '
-                  'releases defined in client_matrix.py, use "all".')
-
-argp.add_argument('-l', '--language',
-                  choices=['all'] + sorted(_LANGUAGES),
-                  nargs='+',
-                  default=['all'],
-                  help='Languages to test')
-
-argp.add_argument('--keep',
-                  action='store_true',
-                  help='keep the created local images after finishing the tests.')
-
-argp.add_argument('--report_file',
-                  default='report.xml',
-                  help='The result file to create.')
-
-argp.add_argument('--allow_flakes',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help=('Allow flaky tests to show as passing (re-runs failed '
-                        'tests up to five times)'))
-argp.add_argument('--bq_result_table',
-                  default='',
-                  type=str,
-                  nargs='?',
-                  help='Upload test results to a specified BQ table.')
+argp.add_argument(
+    '--gcr_path',
+    default='gcr.io/grpc-testing',
+    help='Path of docker images in Google Container Registry')
+argp.add_argument(
+    '--release',
+    default='all',
+    choices=['all', 'master'] + _RELEASES,
+    help='Release tags to test.  When testing all '
+    'releases defined in client_matrix.py, use "all".')
+
+argp.add_argument(
+    '-l',
+    '--language',
+    choices=['all'] + sorted(_LANGUAGES),
+    nargs='+',
+    default=['all'],
+    help='Languages to test')
+
+argp.add_argument(
+    '--keep',
+    action='store_true',
+    help='keep the created local images after finishing the tests.')
+
+argp.add_argument(
+    '--report_file', default='report.xml', help='The result file to create.')
+
+argp.add_argument(
+    '--allow_flakes',
+    default=False,
+    action='store_const',
+    const=True,
+    help=('Allow flaky tests to show as passing (re-runs failed '
+          'tests up to five times)'))
+argp.add_argument(
+    '--bq_result_table',
+    default='',
+    type=str,
+    nargs='?',
+    help='Upload test results to a specified BQ table.')
 
 args = argp.parse_args()
 
@@ -87,138 +96,153 @@ print(str(args))
 
 
 def find_all_images_for_lang(lang):
-  """Find docker images for a language across releases and runtimes.
+    """Find docker images for a language across releases and runtimes.
 
   Returns dictionary of list of (<tag>, <image-full-path>) keyed by runtime.
   """
-  # Find all defined releases.
-  if args.release == 'all':
-    releases = ['master'] + client_matrix.LANG_RELEASE_MATRIX[lang]
-  else:
-    # Look for a particular release.
-    if args.release not in ['master'] + client_matrix.LANG_RELEASE_MATRIX[lang]:
-      jobset.message('SKIPPED',
-                     '%s for %s is not defined' % (args.release, lang),
-                     do_newline=True)
-      return {}
-    releases = [args.release]
-
-  # Images tuples keyed by runtime.
-  images = {}
-  for runtime in client_matrix.LANG_RUNTIME_MATRIX[lang]:
-    image_path = '%s/grpc_interop_%s' % (args.gcr_path, runtime)
-    output = subprocess.check_output(['gcloud', 'beta', 'container', 'images',
-                                      'list-tags', '--format=json', image_path])
-    docker_image_list = json.loads(output)
-    # All images should have a single tag or no tag.
-    # TODO(adelez): Remove tagless images.
-    tags = [i['tags'][0] for i in docker_image_list if i['tags']]
-    jobset.message('START', 'Found images for %s: %s' % (image_path, tags),
-                   do_newline=True)
-    skipped = len(docker_image_list) - len(tags)
-    jobset.message('SKIPPED', 'Skipped images (no-tag/unknown-tag): %d' % skipped,
-                   do_newline=True)
-    # Filter tags based on the releases.
-    images[runtime] = [(tag,'%s:%s' % (image_path,tag)) for tag in tags if
-                       tag in releases]
-  return images
+    # Find all defined releases.
+    if args.release == 'all':
+        releases = ['master'] + client_matrix.get_release_tags(lang)
+    else:
+        # Look for a particular release.
+        if args.release not in ['master'] + client_matrix.get_release_tags(
+                lang):
+            jobset.message(
+                'SKIPPED',
+                '%s for %s is not defined' % (args.release, lang),
+                do_newline=True)
+            return {}
+        releases = [args.release]
+
+    # Images tuples keyed by runtime.
+    images = {}
+    for runtime in client_matrix.LANG_RUNTIME_MATRIX[lang]:
+        image_path = '%s/grpc_interop_%s' % (args.gcr_path, runtime)
+        output = subprocess.check_output([
+            'gcloud', 'beta', 'container', 'images', 'list-tags',
+            '--format=json', image_path
+        ])
+        docker_image_list = json.loads(output)
+        # All images should have a single tag or no tag.
+        # TODO(adelez): Remove tagless images.
+        tags = [i['tags'][0] for i in docker_image_list if i['tags']]
+        jobset.message(
+            'START',
+            'Found images for %s: %s' % (image_path, tags),
+            do_newline=True)
+        skipped = len(docker_image_list) - len(tags)
+        jobset.message(
+            'SKIPPED',
+            'Skipped images (no-tag/unknown-tag): %d' % skipped,
+            do_newline=True)
+        # Filter tags based on the releases.
+        images[runtime] = [(tag, '%s:%s' % (image_path, tag)) for tag in tags
+                           if tag in releases]
+    return images
+
 
 # caches test cases (list of JobSpec) loaded from file.  Keyed by lang and runtime.
 def find_test_cases(lang, runtime, release, suite_name):
-  """Returns the list of test cases from testcase files per lang/release."""
-  file_tmpl = os.path.join(os.path.dirname(__file__), 'testcases/%s__%s')
-  testcase_release = release
-  filename_prefix = lang
-  if lang == 'csharp':
-    filename_prefix = runtime
-  if not os.path.exists(file_tmpl % (filename_prefix, release)):
-    testcase_release = 'master'
-  testcases = file_tmpl % (filename_prefix, testcase_release)
-
-  job_spec_list=[]
-  try:
-    with open(testcases) as f:
-      # Only line start with 'docker run' are test cases.
-      for line in f.readlines():
-        if line.startswith('docker run'):
-          m = re.search('--test_case=(.*)"', line)
-          shortname = m.group(1) if m else 'unknown_test'
-          m = re.search('--server_host_override=(.*).sandbox.googleapis.com', 
+    """Returns the list of test cases from testcase files per lang/release."""
+    file_tmpl = os.path.join(os.path.dirname(__file__), 'testcases/%s__%s')
+    testcase_release = release
+    filename_prefix = lang
+    if lang == 'csharp':
+        filename_prefix = runtime
+    if not os.path.exists(file_tmpl % (filename_prefix, release)):
+        testcase_release = 'master'
+    testcases = file_tmpl % (filename_prefix, testcase_release)
+
+    job_spec_list = []
+    try:
+        with open(testcases) as f:
+            # Only line start with 'docker run' are test cases.
+            for line in f.readlines():
+                if line.startswith('docker run'):
+                    m = re.search('--test_case=(.*)"', line)
+                    shortname = m.group(1) if m else 'unknown_test'
+                    m = re.search(
+                        '--server_host_override=(.*).sandbox.googleapis.com',
                         line)
-          server = m.group(1) if m else 'unknown_server'
-          spec = jobset.JobSpec(cmdline=line,
-                                shortname='%s:%s:%s:%s' % (suite_name, lang, 
-                                                           server, shortname),
-                                timeout_seconds=_TEST_TIMEOUT,
-                                shell=True,
-                                flake_retries=5 if args.allow_flakes else 0)
-          job_spec_list.append(spec)
-      jobset.message('START',
-                     'Loaded %s tests from %s' % (len(job_spec_list), testcases),
-                     do_newline=True)
-  except IOError as err:
-    jobset.message('FAILED', err, do_newline=True)
-  return job_spec_list
+                    server = m.group(1) if m else 'unknown_server'
+                    spec = jobset.JobSpec(
+                        cmdline=line,
+                        shortname='%s:%s:%s:%s' % (suite_name, lang, server,
+                                                   shortname),
+                        timeout_seconds=_TEST_TIMEOUT,
+                        shell=True,
+                        flake_retries=5 if args.allow_flakes else 0)
+                    job_spec_list.append(spec)
+            jobset.message(
+                'START',
+                'Loaded %s tests from %s' % (len(job_spec_list), testcases),
+                do_newline=True)
+    except IOError as err:
+        jobset.message('FAILED', err, do_newline=True)
+    return job_spec_list
+
 
 _xml_report_tree = report_utils.new_junit_xml_tree()
+
+
 def run_tests_for_lang(lang, runtime, images):
-  """Find and run all test cases for a language.
+    """Find and run all test cases for a language.
 
   images is a list of (<release-tag>, <image-full-path>) tuple.
   """
-  total_num_failures = 0
-  for image_tuple in images:
-    release, image = image_tuple
-    jobset.message('START', 'Testing %s' % image, do_newline=True)
-    # Download the docker image before running each test case.
-    subprocess.check_call(['gcloud', 'docker', '--', 'pull', image])
-    suite_name = '%s__%s_%s' % (lang, runtime, release)
-    job_spec_list = find_test_cases(lang, runtime, release, suite_name)
-    
-    if not job_spec_list:  
-      jobset.message('FAILED', 'No test cases were found.', do_newline=True)
-      return 1
-
-    num_failures, resultset = jobset.run(job_spec_list,
-                                         newline_on_success=True,
-                                         add_env={'docker_image':image},
-                                         maxjobs=args.jobs)
-    if args.bq_result_table and resultset:
-      upload_test_results.upload_interop_results_to_bq(
-          resultset, args.bq_result_table, args)
-    if num_failures:
-      jobset.message('FAILED', 'Some tests failed', do_newline=True)
-      total_num_failures += num_failures
-    else:
-      jobset.message('SUCCESS', 'All tests passed', do_newline=True)
-
-    report_utils.append_junit_xml_results(
-        _xml_report_tree,
-        resultset,
-        'grpc_interop_matrix',
-        suite_name,
-        str(uuid.uuid4()))
-
-    if not args.keep:
-      cleanup(image)
-  
-  return total_num_failures
+    total_num_failures = 0
+    for image_tuple in images:
+        release, image = image_tuple
+        jobset.message('START', 'Testing %s' % image, do_newline=True)
+        # Download the docker image before running each test case.
+        subprocess.check_call(['gcloud', 'docker', '--', 'pull', image])
+        suite_name = '%s__%s_%s' % (lang, runtime, release)
+        job_spec_list = find_test_cases(lang, runtime, release, suite_name)
+
+        if not job_spec_list:
+            jobset.message(
+                'FAILED', 'No test cases were found.', do_newline=True)
+            return 1
+
+        num_failures, resultset = jobset.run(
+            job_spec_list,
+            newline_on_success=True,
+            add_env={'docker_image': image},
+            maxjobs=args.jobs)
+        if args.bq_result_table and resultset:
+            upload_test_results.upload_interop_results_to_bq(
+                resultset, args.bq_result_table, args)
+        if num_failures:
+            jobset.message('FAILED', 'Some tests failed', do_newline=True)
+            total_num_failures += num_failures
+        else:
+            jobset.message('SUCCESS', 'All tests passed', do_newline=True)
+
+        report_utils.append_junit_xml_results(_xml_report_tree, resultset,
+                                              'grpc_interop_matrix', suite_name,
+                                              str(uuid.uuid4()))
+
+        if not args.keep:
+            cleanup(image)
+
+    return total_num_failures
 
 
 def cleanup(image):
-  jobset.message('START', 'Cleanup docker image %s' % image, do_newline=True)
-  dockerjob.remove_image(image, skip_nonexistent=True)
+    jobset.message('START', 'Cleanup docker image %s' % image, do_newline=True)
+    dockerjob.remove_image(image, skip_nonexistent=True)
 
 
 languages = args.language if args.language != ['all'] else _LANGUAGES
 total_num_failures = 0
 for lang in languages:
-  docker_images = find_all_images_for_lang(lang)
-  for runtime in sorted(docker_images.keys()):
-    total_num_failures += run_tests_for_lang(lang, runtime, docker_images[runtime])
+    docker_images = find_all_images_for_lang(lang)
+    for runtime in sorted(docker_images.keys()):
+        total_num_failures += run_tests_for_lang(lang, runtime,
+                                                 docker_images[runtime])
 
 report_utils.create_xml_report_file(_xml_report_tree, args.report_file)
 
 if total_num_failures:
-  sys.exit(1)
+    sys.exit(1)
 sys.exit(0)
diff --git a/tools/interop_matrix/testcases/ruby__v1.0.1 b/tools/interop_matrix/testcases/ruby__v1.0.1
new file mode 100755
index 0000000000..effbef1d18
--- /dev/null
+++ b/tools/interop_matrix/testcases/ruby__v1.0.1
@@ -0,0 +1,20 @@
+#!/bin/bash
+echo "Testing ${docker_image:=grpc_interop_ruby:6bd1f0eb-51a4-4ad8-861c-1cbd7a929f33}"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=large_unary"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=empty_unary"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=ping_pong"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=empty_stream"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=client_streaming"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=server_streaming"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=cancel_after_begin"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=cancel_after_first_response"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=timeout_on_sleeping_server"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=large_unary"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=empty_unary"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=ping_pong"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=empty_stream"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=client_streaming"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=server_streaming"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=cancel_after_begin"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=cancel_after_first_response"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=timeout_on_sleeping_server"
diff --git a/tools/line_count/collect-history.py b/tools/line_count/collect-history.py
index 3f030fbb8f..d2d5c95705 100755
--- a/tools/line_count/collect-history.py
+++ b/tools/line_count/collect-history.py
@@ -19,20 +19,23 @@ import datetime
 # this script is only of historical interest: it's the script that was used to
 # bootstrap the dataset
 
+
 def daterange(start, end):
-  for n in range(int((end - start).days)):
-    yield start + datetime.timedelta(n)
+    for n in range(int((end - start).days)):
+        yield start + datetime.timedelta(n)
+
 
 start_date = datetime.date(2017, 3, 26)
 end_date = datetime.date(2017, 3, 29)
 
 for dt in daterange(start_date, end_date):
-  dmy = dt.strftime('%Y-%m-%d')
-  sha1 = subprocess.check_output(['git', 'rev-list', '-n', '1',
-                                  '--before=%s' % dmy,
-                                  'master']).strip()
-  subprocess.check_call(['git', 'checkout', sha1])
-  subprocess.check_call(['git', 'submodule', 'update'])
-  subprocess.check_call(['git', 'clean', '-f', '-x', '-d'])
-  subprocess.check_call(['cloc', '--vcs=git', '--by-file', '--yaml', '--out=../count/%s.yaml' % dmy, '.'])
-
+    dmy = dt.strftime('%Y-%m-%d')
+    sha1 = subprocess.check_output(
+        ['git', 'rev-list', '-n', '1', '--before=%s' % dmy, 'master']).strip()
+    subprocess.check_call(['git', 'checkout', sha1])
+    subprocess.check_call(['git', 'submodule', 'update'])
+    subprocess.check_call(['git', 'clean', '-f', '-x', '-d'])
+    subprocess.check_call([
+        'cloc', '--vcs=git', '--by-file', '--yaml',
+        '--out=../count/%s.yaml' % dmy, '.'
+    ])
diff --git a/tools/line_count/summarize-history.py b/tools/line_count/summarize-history.py
index d2ef7ec324..80b0ed7a7e 100755
--- a/tools/line_count/summarize-history.py
+++ b/tools/line_count/summarize-history.py
@@ -13,22 +13,25 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-
 import subprocess
 import datetime
 
 # this script is only of historical interest: it's the script that was used to
 # bootstrap the dataset
 
+
 def daterange(start, end):
-  for n in range(int((end - start).days)):
-    yield start + datetime.timedelta(n)
+    for n in range(int((end - start).days)):
+        yield start + datetime.timedelta(n)
+
 
 start_date = datetime.date(2017, 3, 26)
 end_date = datetime.date(2017, 3, 29)
 
 for dt in daterange(start_date, end_date):
-  dmy = dt.strftime('%Y-%m-%d')
-  print dmy
-  subprocess.check_call(['tools/line_count/yaml2csv.py', '-i', '../count/%s.yaml' % dmy, '-d', dmy, '-o', '../count/%s.csv' % dmy])
-
+    dmy = dt.strftime('%Y-%m-%d')
+    print dmy
+    subprocess.check_call([
+        'tools/line_count/yaml2csv.py', '-i', '../count/%s.yaml' % dmy, '-d',
+        dmy, '-o', '../count/%s.csv' % dmy
+    ])
diff --git a/tools/line_count/yaml2csv.py b/tools/line_count/yaml2csv.py
index 2a38a12c80..dd2e92b360 100755
--- a/tools/line_count/yaml2csv.py
+++ b/tools/line_count/yaml2csv.py
@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-
 import yaml
 import argparse
 import datetime
@@ -21,18 +20,22 @@ import csv
 
 argp = argparse.ArgumentParser(description='Convert cloc yaml to bigquery csv')
 argp.add_argument('-i', '--input', type=str)
-argp.add_argument('-d', '--date', type=str, default=datetime.date.today().strftime('%Y-%m-%d'))
+argp.add_argument(
+    '-d',
+    '--date',
+    type=str,
+    default=datetime.date.today().strftime('%Y-%m-%d'))
 argp.add_argument('-o', '--output', type=str, default='out.csv')
 args = argp.parse_args()
 
 data = yaml.load(open(args.input).read())
 with open(args.output, 'w') as outf:
-  writer = csv.DictWriter(outf, ['date', 'name', 'language', 'code', 'comment', 'blank'])
-  for key, value in data.iteritems():
-    if key == 'header': continue
-    if key == 'SUM': continue
-    if key.startswith('third_party/'): continue
-    row = {'name': key, 'date': args.date}
-    row.update(value)
-    writer.writerow(row)
-
+    writer = csv.DictWriter(
+        outf, ['date', 'name', 'language', 'code', 'comment', 'blank'])
+    for key, value in data.iteritems():
+        if key == 'header': continue
+        if key == 'SUM': continue
+        if key.startswith('third_party/'): continue
+        row = {'name': key, 'date': args.date}
+        row.update(value)
+        writer.writerow(row)
diff --git a/tools/mkowners/mkowners.py b/tools/mkowners/mkowners.py
index e0ad998bdc..d8b3d3c332 100755
--- a/tools/mkowners/mkowners.py
+++ b/tools/mkowners/mkowners.py
@@ -24,10 +24,8 @@ import subprocess
 # Find the root of the git tree
 #
 
-git_root = (subprocess
-            .check_output(['git', 'rev-parse', '--show-toplevel'])
-            .decode('utf-8')
-            .strip())
+git_root = (subprocess.check_output(['git', 'rev-parse', '--show-toplevel'])
+            .decode('utf-8').strip())
 
 #
 # Parse command line arguments
@@ -36,19 +34,22 @@ git_root = (subprocess
 default_out = os.path.join(git_root, '.github', 'CODEOWNERS')
 
 argp = argparse.ArgumentParser('Generate .github/CODEOWNERS file')
-argp.add_argument('--out', '-o',
-                  type=str,
-                  default=default_out,
-                  help='Output file (default %s)' % default_out)
+argp.add_argument(
+    '--out',
+    '-o',
+    type=str,
+    default=default_out,
+    help='Output file (default %s)' % default_out)
 args = argp.parse_args()
 
 #
 # Walk git tree to locate all OWNERS files
 #
 
-owners_files = [os.path.join(root, 'OWNERS')
-                for root, dirs, files in os.walk(git_root)
-                if 'OWNERS' in files]
+owners_files = [
+    os.path.join(root, 'OWNERS') for root, dirs, files in os.walk(git_root)
+    if 'OWNERS' in files
+]
 
 #
 # Parse owners files
@@ -57,39 +58,40 @@ owners_files = [os.path.join(root, 'OWNERS')
 Owners = collections.namedtuple('Owners', 'parent directives dir')
 Directive = collections.namedtuple('Directive', 'who globs')
 
+
 def parse_owners(filename):
-  with open(filename) as f:
-    src = f.read().splitlines()
-  parent = True
-  directives = []
-  for line in src:
-    line = line.strip()
-    # line := directive | comment
-    if not line: continue
-    if line[0] == '#': continue
-    # it's a directive
-    directive = None
-    if line == 'set noparent':
-      parent = False
-    elif line == '*':
-      directive = Directive(who='*', globs=[])
-    elif ' ' in line:
-      (who, globs) = line.split(' ', 1)
-      globs_list = [glob
-                    for glob in globs.split(' ')
-                    if glob]
-      directive = Directive(who=who, globs=globs_list)
-    else:
-      directive = Directive(who=line, globs=[])
-    if directive:
-      directives.append(directive)
-  return Owners(parent=parent,
-                directives=directives,
-                dir=os.path.relpath(os.path.dirname(filename), git_root))
-
-owners_data = sorted([parse_owners(filename)
-                      for filename in owners_files],
-                     key=operator.attrgetter('dir'))
+    with open(filename) as f:
+        src = f.read().splitlines()
+    parent = True
+    directives = []
+    for line in src:
+        line = line.strip()
+        # line := directive | comment
+        if not line: continue
+        if line[0] == '#': continue
+        # it's a directive
+        directive = None
+        if line == 'set noparent':
+            parent = False
+        elif line == '*':
+            directive = Directive(who='*', globs=[])
+        elif ' ' in line:
+            (who, globs) = line.split(' ', 1)
+            globs_list = [glob for glob in globs.split(' ') if glob]
+            directive = Directive(who=who, globs=globs_list)
+        else:
+            directive = Directive(who=line, globs=[])
+        if directive:
+            directives.append(directive)
+    return Owners(
+        parent=parent,
+        directives=directives,
+        dir=os.path.relpath(os.path.dirname(filename), git_root))
+
+
+owners_data = sorted(
+    [parse_owners(filename) for filename in owners_files],
+    key=operator.attrgetter('dir'))
 
 #
 # Modify owners so that parented OWNERS files point to the actual
@@ -98,24 +100,24 @@ owners_data = sorted([parse_owners(filename)
 
 new_owners_data = []
 for owners in owners_data:
-  if owners.parent == True:
-    best_parent = None
-    best_parent_score = None
-    for possible_parent in owners_data:
-      if possible_parent is owners: continue
-      rel = os.path.relpath(owners.dir, possible_parent.dir)
-      # '..' ==> we had to walk up from possible_parent to get to owners
-      #      ==> not a parent
-      if '..' in rel: continue
-      depth = len(rel.split(os.sep))
-      if not best_parent or depth < best_parent_score:
-        best_parent = possible_parent
-        best_parent_score = depth
-    if best_parent:
-      owners = owners._replace(parent = best_parent.dir)
-    else:
-      owners = owners._replace(parent = None)
-  new_owners_data.append(owners)
+    if owners.parent == True:
+        best_parent = None
+        best_parent_score = None
+        for possible_parent in owners_data:
+            if possible_parent is owners: continue
+            rel = os.path.relpath(owners.dir, possible_parent.dir)
+            # '..' ==> we had to walk up from possible_parent to get to owners
+            #      ==> not a parent
+            if '..' in rel: continue
+            depth = len(rel.split(os.sep))
+            if not best_parent or depth < best_parent_score:
+                best_parent = possible_parent
+                best_parent_score = depth
+        if best_parent:
+            owners = owners._replace(parent=best_parent.dir)
+        else:
+            owners = owners._replace(parent=None)
+    new_owners_data.append(owners)
 owners_data = new_owners_data
 
 #
@@ -123,106 +125,114 @@ owners_data = new_owners_data
 # a CODEOWNERS file for GitHub
 #
 
+
 def full_dir(rules_dir, sub_path):
-  return os.path.join(rules_dir, sub_path) if rules_dir != '.' else sub_path
+    return os.path.join(rules_dir, sub_path) if rules_dir != '.' else sub_path
+
 
 # glob using git
 gg_cache = {}
+
+
 def git_glob(glob):
-  global gg_cache
-  if glob in gg_cache: return gg_cache[glob]
-  r = set(subprocess
-      .check_output(['git', 'ls-files', os.path.join(git_root, glob)])
-      .decode('utf-8')
-      .strip()
-      .splitlines())
-  gg_cache[glob] = r
-  return r
+    global gg_cache
+    if glob in gg_cache: return gg_cache[glob]
+    r = set(
+        subprocess.check_output(
+            ['git', 'ls-files', os.path.join(git_root, glob)]).decode('utf-8')
+        .strip().splitlines())
+    gg_cache[glob] = r
+    return r
+
 
 def expand_directives(root, directives):
-  globs = collections.OrderedDict()
-  # build a table of glob --> owners
-  for directive in directives:
-    for glob in directive.globs or ['**']:
-      if glob not in globs:
-        globs[glob] = []
-      if directive.who not in globs[glob]:
-        globs[glob].append(directive.who)
-  # expand owners for intersecting globs
-  sorted_globs = sorted(globs.keys(),
-                        key=lambda g: len(git_glob(full_dir(root, g))),
-                        reverse=True)
-  out_globs = collections.OrderedDict()
-  for glob_add in sorted_globs:
-    who_add = globs[glob_add]
-    pre_items = [i for i in out_globs.items()]
-    out_globs[glob_add] = who_add.copy()
-    for glob_have, who_have in pre_items:
-      files_add = git_glob(full_dir(root, glob_add))
-      files_have = git_glob(full_dir(root, glob_have))
-      intersect = files_have.intersection(files_add)
-      if intersect:
-        for f in sorted(files_add): # sorted to ensure merge stability
-          if f not in intersect:
-            out_globs[os.path.relpath(f, start=root)] = who_add
-        for who in who_have:
-          if who not in out_globs[glob_add]:
-            out_globs[glob_add].append(who)
-  return out_globs
+    globs = collections.OrderedDict()
+    # build a table of glob --> owners
+    for directive in directives:
+        for glob in directive.globs or ['**']:
+            if glob not in globs:
+                globs[glob] = []
+            if directive.who not in globs[glob]:
+                globs[glob].append(directive.who)
+    # expand owners for intersecting globs
+    sorted_globs = sorted(
+        globs.keys(),
+        key=lambda g: len(git_glob(full_dir(root, g))),
+        reverse=True)
+    out_globs = collections.OrderedDict()
+    for glob_add in sorted_globs:
+        who_add = globs[glob_add]
+        pre_items = [i for i in out_globs.items()]
+        out_globs[glob_add] = who_add.copy()
+        for glob_have, who_have in pre_items:
+            files_add = git_glob(full_dir(root, glob_add))
+            files_have = git_glob(full_dir(root, glob_have))
+            intersect = files_have.intersection(files_add)
+            if intersect:
+                for f in sorted(files_add):  # sorted to ensure merge stability
+                    if f not in intersect:
+                        out_globs[os.path.relpath(f, start=root)] = who_add
+                for who in who_have:
+                    if who not in out_globs[glob_add]:
+                        out_globs[glob_add].append(who)
+    return out_globs
+
 
 def add_parent_to_globs(parent, globs, globs_dir):
-  if not parent: return
-  for owners in owners_data:
-    if owners.dir == parent:
-      owners_globs = expand_directives(owners.dir, owners.directives)
-      for oglob, oglob_who in owners_globs.items():
-        for gglob, gglob_who in globs.items():
-          files_parent = git_glob(full_dir(owners.dir, oglob))
-          files_child = git_glob(full_dir(globs_dir, gglob))
-          intersect = files_parent.intersection(files_child)
-          gglob_who_orig = gglob_who.copy()
-          if intersect:
-            for f in sorted(files_child): # sorted to ensure merge stability
-              if f not in intersect:
-                who = gglob_who_orig.copy()
-                globs[os.path.relpath(f, start=globs_dir)] = who
-            for who in oglob_who:
-              if who not in gglob_who:
-                gglob_who.append(who)
-      add_parent_to_globs(owners.parent, globs, globs_dir)
-      return
-  assert(False)
+    if not parent: return
+    for owners in owners_data:
+        if owners.dir == parent:
+            owners_globs = expand_directives(owners.dir, owners.directives)
+            for oglob, oglob_who in owners_globs.items():
+                for gglob, gglob_who in globs.items():
+                    files_parent = git_glob(full_dir(owners.dir, oglob))
+                    files_child = git_glob(full_dir(globs_dir, gglob))
+                    intersect = files_parent.intersection(files_child)
+                    gglob_who_orig = gglob_who.copy()
+                    if intersect:
+                        for f in sorted(files_child
+                                       ):  # sorted to ensure merge stability
+                            if f not in intersect:
+                                who = gglob_who_orig.copy()
+                                globs[os.path.relpath(f, start=globs_dir)] = who
+                        for who in oglob_who:
+                            if who not in gglob_who:
+                                gglob_who.append(who)
+            add_parent_to_globs(owners.parent, globs, globs_dir)
+            return
+    assert (False)
+
 
 todo = owners_data.copy()
 done = set()
 with open(args.out, 'w') as out:
-  out.write('# Auto-generated by the tools/mkowners/mkowners.py tool\n')
-  out.write('# Uses OWNERS files in different modules throughout the\n')
-  out.write('# repository as the source of truth for module ownership.\n')
-  written_globs = []
-  while todo:
-    head, *todo = todo
-    if head.parent and not head.parent in done:
-      todo.append(head)
-      continue
-    globs = expand_directives(head.dir, head.directives)
-    add_parent_to_globs(head.parent, globs, head.dir)
-    for glob, owners in globs.items():
-      skip = False
-      for glob1, owners1, dir1 in reversed(written_globs):
-        files = git_glob(full_dir(head.dir, glob))
-        files1 = git_glob(full_dir(dir1, glob1))
-        intersect = files.intersection(files1)
-        if files == intersect:
-          if sorted(owners) == sorted(owners1):
-            skip = True # nothing new in this rule
-            break
-        elif intersect:
-          # continuing would cause a semantic change since some files are
-          # affected differently by this rule and CODEOWNERS is order dependent
-          break
-      if not skip:
-        out.write('/%s %s\n' % (
-            full_dir(head.dir, glob), ' '.join(owners)))
-        written_globs.append((glob, owners, head.dir))
-    done.add(head.dir)
+    out.write('# Auto-generated by the tools/mkowners/mkowners.py tool\n')
+    out.write('# Uses OWNERS files in different modules throughout the\n')
+    out.write('# repository as the source of truth for module ownership.\n')
+    written_globs = []
+    while todo:
+        head, *todo = todo
+        if head.parent and not head.parent in done:
+            todo.append(head)
+            continue
+        globs = expand_directives(head.dir, head.directives)
+        add_parent_to_globs(head.parent, globs, head.dir)
+        for glob, owners in globs.items():
+            skip = False
+            for glob1, owners1, dir1 in reversed(written_globs):
+                files = git_glob(full_dir(head.dir, glob))
+                files1 = git_glob(full_dir(dir1, glob1))
+                intersect = files.intersection(files1)
+                if files == intersect:
+                    if sorted(owners) == sorted(owners1):
+                        skip = True  # nothing new in this rule
+                        break
+                elif intersect:
+                    # continuing would cause a semantic change since some files are
+                    # affected differently by this rule and CODEOWNERS is order dependent
+                    break
+            if not skip:
+                out.write('/%s %s\n' % (full_dir(head.dir, glob),
+                                        ' '.join(owners)))
+                written_globs.append((glob, owners, head.dir))
+        done.add(head.dir)
diff --git a/tools/profiling/bloat/bloat_diff.py b/tools/profiling/bloat/bloat_diff.py
index 9b40685e90..91611c2ca4 100755
--- a/tools/profiling/bloat/bloat_diff.py
+++ b/tools/profiling/bloat/bloat_diff.py
@@ -23,12 +23,11 @@ import subprocess
 import sys
 
 sys.path.append(
-  os.path.join(
-    os.path.dirname(sys.argv[0]), '..', '..', 'run_tests', 'python_utils'))
+    os.path.join(
+        os.path.dirname(sys.argv[0]), '..', '..', 'run_tests', 'python_utils'))
 import comment_on_pr
 
-argp = argparse.ArgumentParser(
-    description='Perform diff on microbenchmarks')
+argp = argparse.ArgumentParser(description='Perform diff on microbenchmarks')
 
 argp.add_argument(
     '-d',
@@ -36,64 +35,59 @@ argp.add_argument(
     type=str,
     help='Commit or branch to compare the current one to')
 
-argp.add_argument(
-    '-j',
-    '--jobs',
-    type=int,
-    default=multiprocessing.cpu_count())
+argp.add_argument('-j', '--jobs', type=int, default=multiprocessing.cpu_count())
 
 args = argp.parse_args()
 
 LIBS = [
-  'libgrpc.so',
-  'libgrpc++.so',
+    'libgrpc.so',
+    'libgrpc++.so',
 ]
 
+
 def build(where):
-  subprocess.check_call('make -j%d' % args.jobs,
-                        shell=True, cwd='.')
-  shutil.rmtree('bloat_diff_%s' % where, ignore_errors=True)
-  os.rename('libs', 'bloat_diff_%s' % where)
+    subprocess.check_call('make -j%d' % args.jobs, shell=True, cwd='.')
+    shutil.rmtree('bloat_diff_%s' % where, ignore_errors=True)
+    os.rename('libs', 'bloat_diff_%s' % where)
+
 
 build('new')
 
 if args.diff_base:
     old = 'old'
     where_am_i = subprocess.check_output(
-      ['git', 'rev-parse', '--abbrev-ref', 'HEAD']).strip()
+        ['git', 'rev-parse', '--abbrev-ref', 'HEAD']).strip()
     subprocess.check_call(['git', 'checkout', args.diff_base])
     subprocess.check_call(['git', 'submodule', 'update'])
     try:
-      try:
-        build('old')
-      except subprocess.CalledProcessError, e:
-        subprocess.check_call(['make', 'clean'])
-        build('old')
+        try:
+            build('old')
+        except subprocess.CalledProcessError, e:
+            subprocess.check_call(['make', 'clean'])
+            build('old')
     finally:
-      subprocess.check_call(['git', 'checkout', where_am_i])
-      subprocess.check_call(['git', 'submodule', 'update'])
+        subprocess.check_call(['git', 'checkout', where_am_i])
+        subprocess.check_call(['git', 'submodule', 'update'])
 
-subprocess.check_call('make -j%d' % args.jobs,
-                      shell=True, cwd='third_party/bloaty')
+subprocess.check_call(
+    'make -j%d' % args.jobs, shell=True, cwd='third_party/bloaty')
 
 text = ''
 for lib in LIBS:
-  text += '****************************************************************\n\n'
-  text += lib + '\n\n'
-  old_version = glob.glob('bloat_diff_old/opt/%s' % lib)
-  new_version = glob.glob('bloat_diff_new/opt/%s' % lib)
-  assert len(new_version) == 1
-  cmd = 'third_party/bloaty/bloaty -d compileunits,symbols'
-  if old_version:
-    assert len(old_version) == 1
-    text += subprocess.check_output('%s %s -- %s' %
-                                    (cmd, new_version[0], old_version[0]),
-                                    shell=True)
-  else:
-    text += subprocess.check_output('%s %s' %
-                                    (cmd, new_version[0]),
-                                    shell=True)
-  text += '\n\n'
+    text += '****************************************************************\n\n'
+    text += lib + '\n\n'
+    old_version = glob.glob('bloat_diff_old/opt/%s' % lib)
+    new_version = glob.glob('bloat_diff_new/opt/%s' % lib)
+    assert len(new_version) == 1
+    cmd = 'third_party/bloaty/bloaty -d compileunits,symbols'
+    if old_version:
+        assert len(old_version) == 1
+        text += subprocess.check_output(
+            '%s %s -- %s' % (cmd, new_version[0], old_version[0]), shell=True)
+    else:
+        text += subprocess.check_output(
+            '%s %s' % (cmd, new_version[0]), shell=True)
+    text += '\n\n'
 
 print text
 comment_on_pr.comment_on_pr('```\n%s\n```' % text)
diff --git a/tools/profiling/latency_profile/profile_analyzer.py b/tools/profiling/latency_profile/profile_analyzer.py
index 8a19afb761..e3d33574c2 100755
--- a/tools/profiling/latency_profile/profile_analyzer.py
+++ b/tools/profiling/latency_profile/profile_analyzer.py
@@ -23,7 +23,6 @@ import sys
 import tabulate
 import time
 
-
 SELF_TIME = object()
 TIME_FROM_SCOPE_START = object()
 TIME_TO_SCOPE_END = object()
@@ -31,124 +30,129 @@ TIME_FROM_STACK_START = object()
 TIME_TO_STACK_END = object()
 TIME_FROM_LAST_IMPORTANT = object()
 
-
-argp = argparse.ArgumentParser(description='Process output of basic_prof builds')
+argp = argparse.ArgumentParser(
+    description='Process output of basic_prof builds')
 argp.add_argument('--source', default='latency_trace.txt', type=str)
 argp.add_argument('--fmt', choices=tabulate.tabulate_formats, default='simple')
 argp.add_argument('--out', default='-', type=str)
 args = argp.parse_args()
 
+
 class LineItem(object):
 
-  def __init__(self, line, indent):
-    self.tag = line['tag']
-    self.indent = indent
-    self.start_time = line['t']
-    self.end_time = None
-    self.important = line['imp']
-    self.filename = line['file']
-    self.fileline = line['line']
-    self.times = {}
+    def __init__(self, line, indent):
+        self.tag = line['tag']
+        self.indent = indent
+        self.start_time = line['t']
+        self.end_time = None
+        self.important = line['imp']
+        self.filename = line['file']
+        self.fileline = line['line']
+        self.times = {}
 
 
 class ScopeBuilder(object):
 
-  def __init__(self, call_stack_builder, line):
-    self.call_stack_builder = call_stack_builder
-    self.indent = len(call_stack_builder.stk)
-    self.top_line = LineItem(line, self.indent)
-    call_stack_builder.lines.append(self.top_line)
-    self.first_child_pos = len(call_stack_builder.lines)
-
-  def mark(self, line):
-    line_item = LineItem(line, self.indent + 1)
-    line_item.end_time = line_item.start_time
-    self.call_stack_builder.lines.append(line_item)
-
-  def finish(self, line):
-    assert line['tag'] == self.top_line.tag, (
-        'expected %s, got %s; thread=%s; t0=%f t1=%f' %
-        (self.top_line.tag, line['tag'], line['thd'], self.top_line.start_time,
-         line['t']))
-    final_time_stamp = line['t']
-    assert self.top_line.end_time is None
-    self.top_line.end_time = final_time_stamp
-    self.top_line.important = self.top_line.important or line['imp']
-    assert SELF_TIME not in self.top_line.times
-    self.top_line.times[SELF_TIME] = final_time_stamp - self.top_line.start_time
-    for line in self.call_stack_builder.lines[self.first_child_pos:]:
-      if TIME_FROM_SCOPE_START not in line.times:
-        line.times[TIME_FROM_SCOPE_START] = line.start_time - self.top_line.start_time
-        line.times[TIME_TO_SCOPE_END] = final_time_stamp - line.end_time
+    def __init__(self, call_stack_builder, line):
+        self.call_stack_builder = call_stack_builder
+        self.indent = len(call_stack_builder.stk)
+        self.top_line = LineItem(line, self.indent)
+        call_stack_builder.lines.append(self.top_line)
+        self.first_child_pos = len(call_stack_builder.lines)
+
+    def mark(self, line):
+        line_item = LineItem(line, self.indent + 1)
+        line_item.end_time = line_item.start_time
+        self.call_stack_builder.lines.append(line_item)
+
+    def finish(self, line):
+        assert line['tag'] == self.top_line.tag, (
+            'expected %s, got %s; thread=%s; t0=%f t1=%f' %
+            (self.top_line.tag, line['tag'], line['thd'],
+             self.top_line.start_time, line['t']))
+        final_time_stamp = line['t']
+        assert self.top_line.end_time is None
+        self.top_line.end_time = final_time_stamp
+        self.top_line.important = self.top_line.important or line['imp']
+        assert SELF_TIME not in self.top_line.times
+        self.top_line.times[
+            SELF_TIME] = final_time_stamp - self.top_line.start_time
+        for line in self.call_stack_builder.lines[self.first_child_pos:]:
+            if TIME_FROM_SCOPE_START not in line.times:
+                line.times[
+                    TIME_FROM_SCOPE_START] = line.start_time - self.top_line.start_time
+                line.times[TIME_TO_SCOPE_END] = final_time_stamp - line.end_time
 
 
 class CallStackBuilder(object):
 
-  def __init__(self):
-    self.stk = []
-    self.signature = hashlib.md5()
-    self.lines = []
-
-  def finish(self):
-    start_time = self.lines[0].start_time
-    end_time = self.lines[0].end_time
-    self.signature = self.signature.hexdigest()
-    last_important = start_time
-    for line in self.lines:
-      line.times[TIME_FROM_STACK_START] = line.start_time - start_time
-      line.times[TIME_TO_STACK_END] = end_time - line.end_time
-      line.times[TIME_FROM_LAST_IMPORTANT] = line.start_time - last_important
-      if line.important:
-        last_important = line.end_time
-    last_important = end_time
-
-  def add(self, line):
-    line_type = line['type']
-    self.signature.update(line_type)
-    self.signature.update(line['tag'])
-    if line_type == '{':
-      self.stk.append(ScopeBuilder(self, line))
-      return False
-    elif line_type == '}':
-      assert self.stk, (
-          'expected non-empty stack for closing %s; thread=%s; t=%f' %
-          (line['tag'], line['thd'], line['t']))
-      self.stk.pop().finish(line)
-      if not self.stk:
-        self.finish()
-        return True
-      return False
-    elif line_type == '.' or line_type == '!':
-      self.stk[-1].mark(line)
-      return False
-    else:
-      raise Exception('Unknown line type: \'%s\'' % line_type)
+    def __init__(self):
+        self.stk = []
+        self.signature = hashlib.md5()
+        self.lines = []
+
+    def finish(self):
+        start_time = self.lines[0].start_time
+        end_time = self.lines[0].end_time
+        self.signature = self.signature.hexdigest()
+        last_important = start_time
+        for line in self.lines:
+            line.times[TIME_FROM_STACK_START] = line.start_time - start_time
+            line.times[TIME_TO_STACK_END] = end_time - line.end_time
+            line.times[
+                TIME_FROM_LAST_IMPORTANT] = line.start_time - last_important
+            if line.important:
+                last_important = line.end_time
+        last_important = end_time
+
+    def add(self, line):
+        line_type = line['type']
+        self.signature.update(line_type)
+        self.signature.update(line['tag'])
+        if line_type == '{':
+            self.stk.append(ScopeBuilder(self, line))
+            return False
+        elif line_type == '}':
+            assert self.stk, (
+                'expected non-empty stack for closing %s; thread=%s; t=%f' %
+                (line['tag'], line['thd'], line['t']))
+            self.stk.pop().finish(line)
+            if not self.stk:
+                self.finish()
+                return True
+            return False
+        elif line_type == '.' or line_type == '!':
+            self.stk[-1].mark(line)
+            return False
+        else:
+            raise Exception('Unknown line type: \'%s\'' % line_type)
 
 
 class CallStack(object):
 
-  def __init__(self, initial_call_stack_builder):
-    self.count = 1
-    self.signature = initial_call_stack_builder.signature
-    self.lines = initial_call_stack_builder.lines
-    for line in self.lines:
-      for key, val in line.times.items():
-        line.times[key] = [val]
-
-  def add(self, call_stack_builder):
-    assert self.signature == call_stack_builder.signature
-    self.count += 1
-    assert len(self.lines) == len(call_stack_builder.lines)
-    for lsum, line in itertools.izip(self.lines, call_stack_builder.lines):
-      assert lsum.tag == line.tag
-      assert lsum.times.keys() == line.times.keys()
-      for k, lst in lsum.times.iteritems():
-        lst.append(line.times[k])
-
-  def finish(self):
-    for line in self.lines:
-      for lst in line.times.itervalues():
-        lst.sort()
+    def __init__(self, initial_call_stack_builder):
+        self.count = 1
+        self.signature = initial_call_stack_builder.signature
+        self.lines = initial_call_stack_builder.lines
+        for line in self.lines:
+            for key, val in line.times.items():
+                line.times[key] = [val]
+
+    def add(self, call_stack_builder):
+        assert self.signature == call_stack_builder.signature
+        self.count += 1
+        assert len(self.lines) == len(call_stack_builder.lines)
+        for lsum, line in itertools.izip(self.lines, call_stack_builder.lines):
+            assert lsum.tag == line.tag
+            assert lsum.times.keys() == line.times.keys()
+            for k, lst in lsum.times.iteritems():
+                lst.append(line.times[k])
+
+    def finish(self):
+        for line in self.lines:
+            for lst in line.times.itervalues():
+                lst.sort()
+
 
 builder = collections.defaultdict(CallStackBuilder)
 call_stacks = collections.defaultdict(CallStack)
@@ -156,26 +160,28 @@ call_stacks = collections.defaultdict(CallStack)
 lines = 0
 start = time.time()
 with open(args.source) as f:
-  for line in f:
-    lines += 1
-    inf = json.loads(line)
-    thd = inf['thd']
-    cs = builder[thd]
-    if cs.add(inf):
-      if cs.signature in call_stacks:
-        call_stacks[cs.signature].add(cs)
-      else:
-        call_stacks[cs.signature] = CallStack(cs)
-      del builder[thd]
+    for line in f:
+        lines += 1
+        inf = json.loads(line)
+        thd = inf['thd']
+        cs = builder[thd]
+        if cs.add(inf):
+            if cs.signature in call_stacks:
+                call_stacks[cs.signature].add(cs)
+            else:
+                call_stacks[cs.signature] = CallStack(cs)
+            del builder[thd]
 time_taken = time.time() - start
 
-call_stacks = sorted(call_stacks.values(), key=lambda cs: cs.count, reverse=True)
+call_stacks = sorted(
+    call_stacks.values(), key=lambda cs: cs.count, reverse=True)
 total_stacks = 0
 for cs in call_stacks:
-  total_stacks += cs.count
-  cs.finish()
+    total_stacks += cs.count
+    cs.finish()
+
 
-def percentile(N, percent, key=lambda x:x):
+def percentile(N, percent, key=lambda x: x):
     """
     Find the percentile of a list of values.
 
@@ -187,80 +193,83 @@ def percentile(N, percent, key=lambda x:x):
     """
     if not N:
         return None
-    k = (len(N)-1) * percent
+    k = (len(N) - 1) * percent
     f = math.floor(k)
     c = math.ceil(k)
     if f == c:
         return key(N[int(k)])
-    d0 = key(N[int(f)]) * (c-k)
-    d1 = key(N[int(c)]) * (k-f)
-    return d0+d1
+    d0 = key(N[int(f)]) * (c - k)
+    d1 = key(N[int(c)]) * (k - f)
+    return d0 + d1
+
 
 def tidy_tag(tag):
-  if tag[0:10] == 'GRPC_PTAG_':
-    return tag[10:]
-  return tag
+    if tag[0:10] == 'GRPC_PTAG_':
+        return tag[10:]
+    return tag
+
 
 def time_string(values):
-  num_values = len(values)
-  return '%.1f/%.1f/%.1f' % (
-      1e6 * percentile(values, 0.5),
-      1e6 * percentile(values, 0.9),
-      1e6 * percentile(values, 0.99))
+    num_values = len(values)
+    return '%.1f/%.1f/%.1f' % (1e6 * percentile(values, 0.5),
+                               1e6 * percentile(values, 0.9),
+                               1e6 * percentile(values, 0.99))
+
 
 def time_format(idx):
-  def ent(line, idx=idx):
-    if idx in line.times:
-      return time_string(line.times[idx])
-    return ''
-  return ent
 
-BANNER = {
-    'simple': 'Count: %(count)d',
-    'html': '<h1>Count: %(count)d</h1>'
-}
+    def ent(line, idx=idx):
+        if idx in line.times:
+            return time_string(line.times[idx])
+        return ''
+
+    return ent
+
+
+BANNER = {'simple': 'Count: %(count)d', 'html': '<h1>Count: %(count)d</h1>'}
 
 FORMAT = [
-  ('TAG', lambda line: '..'*line.indent + tidy_tag(line.tag)),
-  ('LOC', lambda line: '%s:%d' % (line.filename[line.filename.rfind('/')+1:], line.fileline)),
-  ('IMP', lambda line: '*' if line.important else ''),
-  ('FROM_IMP', time_format(TIME_FROM_LAST_IMPORTANT)),
-  ('FROM_STACK_START', time_format(TIME_FROM_STACK_START)),
-  ('SELF', time_format(SELF_TIME)),
-  ('TO_STACK_END', time_format(TIME_TO_STACK_END)),
-  ('FROM_SCOPE_START', time_format(TIME_FROM_SCOPE_START)),
-  ('SELF', time_format(SELF_TIME)),
-  ('TO_SCOPE_END', time_format(TIME_TO_SCOPE_END)),
+    ('TAG', lambda line: '..' * line.indent + tidy_tag(line.tag)),
+    ('LOC',
+     lambda line: '%s:%d' % (line.filename[line.filename.rfind('/') + 1:], line.fileline)
+    ),
+    ('IMP', lambda line: '*' if line.important else ''),
+    ('FROM_IMP', time_format(TIME_FROM_LAST_IMPORTANT)),
+    ('FROM_STACK_START', time_format(TIME_FROM_STACK_START)),
+    ('SELF', time_format(SELF_TIME)),
+    ('TO_STACK_END', time_format(TIME_TO_STACK_END)),
+    ('FROM_SCOPE_START', time_format(TIME_FROM_SCOPE_START)),
+    ('SELF', time_format(SELF_TIME)),
+    ('TO_SCOPE_END', time_format(TIME_TO_SCOPE_END)),
 ]
 
 out = sys.stdout
 if args.out != '-':
-  out = open(args.out, 'w')
+    out = open(args.out, 'w')
 
 if args.fmt == 'html':
-  print >>out, '<html>'
-  print >>out, '<head>'
-  print >>out, '<title>Profile Report</title>'
-  print >>out, '</head>'
+    print >> out, '<html>'
+    print >> out, '<head>'
+    print >> out, '<title>Profile Report</title>'
+    print >> out, '</head>'
 
 accounted_for = 0
 for cs in call_stacks:
-  if args.fmt in BANNER:
-    print >>out, BANNER[args.fmt] % {
-        'count': cs.count,
-    }
-  header, _ = zip(*FORMAT)
-  table = []
-  for line in cs.lines:
-    fields = []
-    for _, fn in FORMAT:
-      fields.append(fn(line))
-    table.append(fields)
-  print >>out, tabulate.tabulate(table, header, tablefmt=args.fmt)
-  accounted_for += cs.count
-  if accounted_for > .99 * total_stacks:
-    break
+    if args.fmt in BANNER:
+        print >> out, BANNER[args.fmt] % {
+            'count': cs.count,
+        }
+    header, _ = zip(*FORMAT)
+    table = []
+    for line in cs.lines:
+        fields = []
+        for _, fn in FORMAT:
+            fields.append(fn(line))
+        table.append(fields)
+    print >> out, tabulate.tabulate(table, header, tablefmt=args.fmt)
+    accounted_for += cs.count
+    if accounted_for > .99 * total_stacks:
+        break
 
 if args.fmt == 'html':
-  print '</html>'
-
+    print '</html>'
diff --git a/tools/profiling/microbenchmarks/bm2bq.py b/tools/profiling/microbenchmarks/bm2bq.py
index 9f9b672f75..746b643b43 100755
--- a/tools/profiling/microbenchmarks/bm2bq.py
+++ b/tools/profiling/microbenchmarks/bm2bq.py
@@ -28,37 +28,38 @@ import subprocess
 columns = []
 
 for row in json.loads(
-    subprocess.check_output([
-      'bq','--format=json','show','microbenchmarks.microbenchmarks']))['schema']['fields']:
-  columns.append((row['name'], row['type'].lower()))
+        subprocess.check_output([
+            'bq', '--format=json', 'show', 'microbenchmarks.microbenchmarks'
+        ]))['schema']['fields']:
+    columns.append((row['name'], row['type'].lower()))
 
 SANITIZE = {
-  'integer': int,
-  'float': float,
-  'boolean': bool,
-  'string': str,
-  'timestamp': str,
+    'integer': int,
+    'float': float,
+    'boolean': bool,
+    'string': str,
+    'timestamp': str,
 }
 
 if sys.argv[1] == '--schema':
-  print ',\n'.join('%s:%s' % (k, t.upper()) for k, t in columns)
-  sys.exit(0)
+    print ',\n'.join('%s:%s' % (k, t.upper()) for k, t in columns)
+    sys.exit(0)
 
 with open(sys.argv[1]) as f:
-  js = json.loads(f.read())
+    js = json.loads(f.read())
 
 if len(sys.argv) > 2:
-  with open(sys.argv[2]) as f:
-    js2 = json.loads(f.read())
+    with open(sys.argv[2]) as f:
+        js2 = json.loads(f.read())
 else:
-  js2 = None
+    js2 = None
 
-writer = csv.DictWriter(sys.stdout, [c for c,t in columns])
+writer = csv.DictWriter(sys.stdout, [c for c, t in columns])
 
 for row in bm_json.expand_json(js, js2):
-  sane_row = {}
-  for name, sql_type in columns:
-    if name in row:
-      if row[name] == '': continue
-      sane_row[name] = SANITIZE[sql_type](row[name])
-  writer.writerow(sane_row)
+    sane_row = {}
+    for name, sql_type in columns:
+        if name in row:
+            if row[name] == '': continue
+            sane_row[name] = SANITIZE[sql_type](row[name])
+    writer.writerow(sane_row)
diff --git a/tools/profiling/microbenchmarks/bm_diff/bm_build.py b/tools/profiling/microbenchmarks/bm_diff/bm_build.py
index ce62c09d72..a4cd61707d 100755
--- a/tools/profiling/microbenchmarks/bm_diff/bm_build.py
+++ b/tools/profiling/microbenchmarks/bm_diff/bm_build.py
@@ -13,7 +13,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """ Python utility to build opt and counters benchmarks """
 
 import bm_constants
@@ -26,55 +25,55 @@ import shutil
 
 
 def _args():
-  argp = argparse.ArgumentParser(description='Builds microbenchmarks')
-  argp.add_argument(
-    '-b',
-    '--benchmarks',
-    nargs='+',
-    choices=bm_constants._AVAILABLE_BENCHMARK_TESTS,
-    default=bm_constants._AVAILABLE_BENCHMARK_TESTS,
-    help='Which benchmarks to build')
-  argp.add_argument(
-    '-j',
-    '--jobs',
-    type=int,
-    default=multiprocessing.cpu_count(),
-    help='How many CPUs to dedicate to this task')
-  argp.add_argument(
-    '-n',
-    '--name',
-    type=str,
-    help='Unique name of this build. To be used as a handle to pass to the other bm* scripts'
-  )
-  argp.add_argument('--counters', dest='counters', action='store_true')
-  argp.add_argument('--no-counters', dest='counters', action='store_false')
-  argp.set_defaults(counters=True)
-  args = argp.parse_args()
-  assert args.name
-  return args
+    argp = argparse.ArgumentParser(description='Builds microbenchmarks')
+    argp.add_argument(
+        '-b',
+        '--benchmarks',
+        nargs='+',
+        choices=bm_constants._AVAILABLE_BENCHMARK_TESTS,
+        default=bm_constants._AVAILABLE_BENCHMARK_TESTS,
+        help='Which benchmarks to build')
+    argp.add_argument(
+        '-j',
+        '--jobs',
+        type=int,
+        default=multiprocessing.cpu_count(),
+        help='How many CPUs to dedicate to this task')
+    argp.add_argument(
+        '-n',
+        '--name',
+        type=str,
+        help='Unique name of this build. To be used as a handle to pass to the other bm* scripts'
+    )
+    argp.add_argument('--counters', dest='counters', action='store_true')
+    argp.add_argument('--no-counters', dest='counters', action='store_false')
+    argp.set_defaults(counters=True)
+    args = argp.parse_args()
+    assert args.name
+    return args
 
 
 def _make_cmd(cfg, benchmarks, jobs):
-  return ['make'] + benchmarks + ['CONFIG=%s' % cfg, '-j', '%d' % jobs]
+    return ['make'] + benchmarks + ['CONFIG=%s' % cfg, '-j', '%d' % jobs]
 
 
 def build(name, benchmarks, jobs, counters):
-  shutil.rmtree('bm_diff_%s' % name, ignore_errors=True)
-  subprocess.check_call(['git', 'submodule', 'update'])
-  try:
-    subprocess.check_call(_make_cmd('opt', benchmarks, jobs))
-    if counters:
-      subprocess.check_call(_make_cmd('counters', benchmarks, jobs))
-  except subprocess.CalledProcessError, e:
-    subprocess.check_call(['make', 'clean'])
-    subprocess.check_call(_make_cmd('opt', benchmarks, jobs))
-    if counters:
-      subprocess.check_call(_make_cmd('counters', benchmarks, jobs))
-  os.rename(
-    'bins',
-    'bm_diff_%s' % name,)
+    shutil.rmtree('bm_diff_%s' % name, ignore_errors=True)
+    subprocess.check_call(['git', 'submodule', 'update'])
+    try:
+        subprocess.check_call(_make_cmd('opt', benchmarks, jobs))
+        if counters:
+            subprocess.check_call(_make_cmd('counters', benchmarks, jobs))
+    except subprocess.CalledProcessError, e:
+        subprocess.check_call(['make', 'clean'])
+        subprocess.check_call(_make_cmd('opt', benchmarks, jobs))
+        if counters:
+            subprocess.check_call(_make_cmd('counters', benchmarks, jobs))
+    os.rename(
+        'bins',
+        'bm_diff_%s' % name,)
 
 
 if __name__ == '__main__':
-  args = _args()
-  build(args.name, args.benchmarks, args.jobs, args.counters)
+    args = _args()
+    build(args.name, args.benchmarks, args.jobs, args.counters)
diff --git a/tools/profiling/microbenchmarks/bm_diff/bm_constants.py b/tools/profiling/microbenchmarks/bm_diff/bm_constants.py
index 0ec17fa17e..cff29dbe08 100644
--- a/tools/profiling/microbenchmarks/bm_diff/bm_constants.py
+++ b/tools/profiling/microbenchmarks/bm_diff/bm_constants.py
@@ -13,19 +13,19 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """ Configurable constants for the bm_*.py family """
 
 _AVAILABLE_BENCHMARK_TESTS = [
-  'bm_fullstack_unary_ping_pong', 'bm_fullstack_streaming_ping_pong',
-  'bm_fullstack_streaming_pump', 'bm_closure', 'bm_cq', 'bm_call_create',
-  'bm_error', 'bm_chttp2_hpack', 'bm_chttp2_transport', 'bm_pollset',
-  'bm_metadata', 'bm_fullstack_trickle'
+    'bm_fullstack_unary_ping_pong', 'bm_fullstack_streaming_ping_pong',
+    'bm_fullstack_streaming_pump', 'bm_closure', 'bm_cq', 'bm_call_create',
+    'bm_error', 'bm_chttp2_hpack', 'bm_chttp2_transport', 'bm_pollset',
+    'bm_metadata', 'bm_fullstack_trickle'
 ]
 
-_INTERESTING = ('cpu_time', 'real_time', 'call_initial_size-median', 'locks_per_iteration',
-        'allocs_per_iteration', 'writes_per_iteration',
-        'atm_cas_per_iteration', 'atm_add_per_iteration',
-        'nows_per_iteration', 'cli_transport_stalls_per_iteration', 
-        'cli_stream_stalls_per_iteration', 'svr_transport_stalls_per_iteration',
-        'svr_stream_stalls_per_iteration', 'http2_pings_sent_per_iteration')
+_INTERESTING = (
+    'cpu_time', 'real_time', 'call_initial_size-median', 'locks_per_iteration',
+    'allocs_per_iteration', 'writes_per_iteration', 'atm_cas_per_iteration',
+    'atm_add_per_iteration', 'nows_per_iteration',
+    'cli_transport_stalls_per_iteration', 'cli_stream_stalls_per_iteration',
+    'svr_transport_stalls_per_iteration', 'svr_stream_stalls_per_iteration',
+    'http2_pings_sent_per_iteration')
diff --git a/tools/profiling/microbenchmarks/bm_diff/bm_diff.py b/tools/profiling/microbenchmarks/bm_diff/bm_diff.py
index a41d0f0552..b8a3b22861 100755
--- a/tools/profiling/microbenchmarks/bm_diff/bm_diff.py
+++ b/tools/profiling/microbenchmarks/bm_diff/bm_diff.py
@@ -34,190 +34,195 @@ verbose = False
 
 
 def _median(ary):
-  assert (len(ary))
-  ary = sorted(ary)
-  n = len(ary)
-  if n % 2 == 0:
-    return (ary[(n - 1) / 2] + ary[(n - 1) / 2 + 1]) / 2.0
-  else:
-    return ary[n / 2]
+    assert (len(ary))
+    ary = sorted(ary)
+    n = len(ary)
+    if n % 2 == 0:
+        return (ary[(n - 1) / 2] + ary[(n - 1) / 2 + 1]) / 2.0
+    else:
+        return ary[n / 2]
 
 
 def _args():
-  argp = argparse.ArgumentParser(
-    description='Perform diff on microbenchmarks')
-  argp.add_argument(
-    '-t',
-    '--track',
-    choices=sorted(bm_constants._INTERESTING),
-    nargs='+',
-    default=sorted(bm_constants._INTERESTING),
-    help='Which metrics to track')
-  argp.add_argument(
-    '-b',
-    '--benchmarks',
-    nargs='+',
-    choices=bm_constants._AVAILABLE_BENCHMARK_TESTS,
-    default=bm_constants._AVAILABLE_BENCHMARK_TESTS,
-    help='Which benchmarks to run')
-  argp.add_argument(
-    '-l',
-    '--loops',
-    type=int,
-    default=20,
-    help='Number of times to loops the benchmarks. Must match what was passed to bm_run.py'
-  )
-  argp.add_argument(
-    '-r',
-    '--regex',
-    type=str,
-    default="",
-    help='Regex to filter benchmarks run')
-  argp.add_argument('--counters', dest='counters', action='store_true')
-  argp.add_argument('--no-counters', dest='counters', action='store_false')
-  argp.set_defaults(counters=True)
-  argp.add_argument('-n', '--new', type=str, help='New benchmark name')
-  argp.add_argument('-o', '--old', type=str, help='Old benchmark name')
-  argp.add_argument(
-    '-v', '--verbose', type=bool, help='Print details of before/after')
-  args = argp.parse_args()
-  global verbose
-  if args.verbose: verbose = True
-  assert args.new
-  assert args.old
-  return args
+    argp = argparse.ArgumentParser(
+        description='Perform diff on microbenchmarks')
+    argp.add_argument(
+        '-t',
+        '--track',
+        choices=sorted(bm_constants._INTERESTING),
+        nargs='+',
+        default=sorted(bm_constants._INTERESTING),
+        help='Which metrics to track')
+    argp.add_argument(
+        '-b',
+        '--benchmarks',
+        nargs='+',
+        choices=bm_constants._AVAILABLE_BENCHMARK_TESTS,
+        default=bm_constants._AVAILABLE_BENCHMARK_TESTS,
+        help='Which benchmarks to run')
+    argp.add_argument(
+        '-l',
+        '--loops',
+        type=int,
+        default=20,
+        help='Number of times to loops the benchmarks. Must match what was passed to bm_run.py'
+    )
+    argp.add_argument(
+        '-r',
+        '--regex',
+        type=str,
+        default="",
+        help='Regex to filter benchmarks run')
+    argp.add_argument('--counters', dest='counters', action='store_true')
+    argp.add_argument('--no-counters', dest='counters', action='store_false')
+    argp.set_defaults(counters=True)
+    argp.add_argument('-n', '--new', type=str, help='New benchmark name')
+    argp.add_argument('-o', '--old', type=str, help='Old benchmark name')
+    argp.add_argument(
+        '-v', '--verbose', type=bool, help='Print details of before/after')
+    args = argp.parse_args()
+    global verbose
+    if args.verbose: verbose = True
+    assert args.new
+    assert args.old
+    return args
 
 
 def _maybe_print(str):
-  if verbose: print str
+    if verbose: print str
 
 
 class Benchmark:
 
-  def __init__(self):
-    self.samples = {
-      True: collections.defaultdict(list),
-      False: collections.defaultdict(list)
-    }
-    self.final = {}
-
-  def add_sample(self, track, data, new):
-    for f in track:
-      if f in data:
-        self.samples[new][f].append(float(data[f]))
-
-  def process(self, track, new_name, old_name):
-    for f in sorted(track):
-      new = self.samples[True][f]
-      old = self.samples[False][f]
-      if not new or not old: continue
-      mdn_diff = abs(_median(new) - _median(old))
-      _maybe_print('%s: %s=%r %s=%r mdn_diff=%r' %
-             (f, new_name, new, old_name, old, mdn_diff))
-      s = bm_speedup.speedup(new, old, 1e-5)
-      if abs(s) > 3:
-        if mdn_diff > 0.5 or 'trickle' in f:
-          self.final[f] = '%+d%%' % s
-    return self.final.keys()
-
-  def skip(self):
-    return not self.final
-
-  def row(self, flds):
-    return [self.final[f] if f in self.final else '' for f in flds]
+    def __init__(self):
+        self.samples = {
+            True: collections.defaultdict(list),
+            False: collections.defaultdict(list)
+        }
+        self.final = {}
+
+    def add_sample(self, track, data, new):
+        for f in track:
+            if f in data:
+                self.samples[new][f].append(float(data[f]))
+
+    def process(self, track, new_name, old_name):
+        for f in sorted(track):
+            new = self.samples[True][f]
+            old = self.samples[False][f]
+            if not new or not old: continue
+            mdn_diff = abs(_median(new) - _median(old))
+            _maybe_print('%s: %s=%r %s=%r mdn_diff=%r' %
+                         (f, new_name, new, old_name, old, mdn_diff))
+            s = bm_speedup.speedup(new, old, 1e-5)
+            if abs(s) > 3:
+                if mdn_diff > 0.5 or 'trickle' in f:
+                    self.final[f] = '%+d%%' % s
+        return self.final.keys()
+
+    def skip(self):
+        return not self.final
+
+    def row(self, flds):
+        return [self.final[f] if f in self.final else '' for f in flds]
 
 
 def _read_json(filename, badjson_files, nonexistant_files):
-  stripped = ".".join(filename.split(".")[:-2])
-  try:
-    with open(filename) as f:
-      r = f.read();
-      return json.loads(r)
-  except IOError, e:
-    if stripped in nonexistant_files:
-      nonexistant_files[stripped] += 1
-    else:
-      nonexistant_files[stripped] = 1
-    return None
-  except ValueError, e:
-    print r
-    if stripped in badjson_files:
-      badjson_files[stripped] += 1
-    else:
-      badjson_files[stripped] = 1
-    return None
+    stripped = ".".join(filename.split(".")[:-2])
+    try:
+        with open(filename) as f:
+            r = f.read()
+            return json.loads(r)
+    except IOError, e:
+        if stripped in nonexistant_files:
+            nonexistant_files[stripped] += 1
+        else:
+            nonexistant_files[stripped] = 1
+        return None
+    except ValueError, e:
+        print r
+        if stripped in badjson_files:
+            badjson_files[stripped] += 1
+        else:
+            badjson_files[stripped] = 1
+        return None
+
 
 def fmt_dict(d):
-  return ''.join(["    " + k + ": " + str(d[k]) + "\n" for k in d])
+    return ''.join(["    " + k + ": " + str(d[k]) + "\n" for k in d])
+
 
 def diff(bms, loops, regex, track, old, new, counters):
-  benchmarks = collections.defaultdict(Benchmark)
-
-  badjson_files = {}
-  nonexistant_files = {}
-  for bm in bms:
-    for loop in range(0, loops):
-      for line in subprocess.check_output(
-        ['bm_diff_%s/opt/%s' % (old, bm),
-         '--benchmark_list_tests', 
-         '--benchmark_filter=%s' % regex]).splitlines():
-        stripped_line = line.strip().replace("/", "_").replace(
-          "<", "_").replace(">", "_").replace(", ", "_")
-        js_new_opt = _read_json('%s.%s.opt.%s.%d.json' %
-                    (bm, stripped_line, new, loop),
-                    badjson_files, nonexistant_files)
-        js_old_opt = _read_json('%s.%s.opt.%s.%d.json' %
-                    (bm, stripped_line, old, loop),
-                    badjson_files, nonexistant_files)
-        if counters:
-          js_new_ctr = _read_json('%s.%s.counters.%s.%d.json' %
-                      (bm, stripped_line, new, loop),
-                      badjson_files, nonexistant_files)
-          js_old_ctr = _read_json('%s.%s.counters.%s.%d.json' %
-                      (bm, stripped_line, old, loop),
-                      badjson_files, nonexistant_files)
+    benchmarks = collections.defaultdict(Benchmark)
+
+    badjson_files = {}
+    nonexistant_files = {}
+    for bm in bms:
+        for loop in range(0, loops):
+            for line in subprocess.check_output([
+                    'bm_diff_%s/opt/%s' % (old, bm), '--benchmark_list_tests',
+                    '--benchmark_filter=%s' % regex
+            ]).splitlines():
+                stripped_line = line.strip().replace("/", "_").replace(
+                    "<", "_").replace(">", "_").replace(", ", "_")
+                js_new_opt = _read_json('%s.%s.opt.%s.%d.json' %
+                                        (bm, stripped_line, new, loop),
+                                        badjson_files, nonexistant_files)
+                js_old_opt = _read_json('%s.%s.opt.%s.%d.json' %
+                                        (bm, stripped_line, old, loop),
+                                        badjson_files, nonexistant_files)
+                if counters:
+                    js_new_ctr = _read_json('%s.%s.counters.%s.%d.json' %
+                                            (bm, stripped_line, new, loop),
+                                            badjson_files, nonexistant_files)
+                    js_old_ctr = _read_json('%s.%s.counters.%s.%d.json' %
+                                            (bm, stripped_line, old, loop),
+                                            badjson_files, nonexistant_files)
+                else:
+                    js_new_ctr = None
+                    js_old_ctr = None
+
+                for row in bm_json.expand_json(js_new_ctr, js_new_opt):
+                    name = row['cpp_name']
+                    if name.endswith('_mean') or name.endswith('_stddev'):
+                        continue
+                    benchmarks[name].add_sample(track, row, True)
+                for row in bm_json.expand_json(js_old_ctr, js_old_opt):
+                    name = row['cpp_name']
+                    if name.endswith('_mean') or name.endswith('_stddev'):
+                        continue
+                    benchmarks[name].add_sample(track, row, False)
+
+    really_interesting = set()
+    for name, bm in benchmarks.items():
+        _maybe_print(name)
+        really_interesting.update(bm.process(track, new, old))
+    fields = [f for f in track if f in really_interesting]
+
+    headers = ['Benchmark'] + fields
+    rows = []
+    for name in sorted(benchmarks.keys()):
+        if benchmarks[name].skip(): continue
+        rows.append([name] + benchmarks[name].row(fields))
+    note = None
+    if len(badjson_files):
+        note = 'Corrupt JSON data (indicates timeout or crash): \n%s' % fmt_dict(
+            badjson_files)
+    if len(nonexistant_files):
+        if note:
+            note += '\n\nMissing files (indicates new benchmark): \n%s' % fmt_dict(
+                nonexistant_files)
         else:
-          js_new_ctr = None
-          js_old_ctr = None
-
-        for row in bm_json.expand_json(js_new_ctr, js_new_opt):
-          name = row['cpp_name']
-          if name.endswith('_mean') or name.endswith('_stddev'):
-            continue
-          benchmarks[name].add_sample(track, row, True)
-        for row in bm_json.expand_json(js_old_ctr, js_old_opt):
-          name = row['cpp_name']
-          if name.endswith('_mean') or name.endswith('_stddev'):
-            continue
-          benchmarks[name].add_sample(track, row, False)
-
-  really_interesting = set()
-  for name, bm in benchmarks.items():
-    _maybe_print(name)
-    really_interesting.update(bm.process(track, new, old))
-  fields = [f for f in track if f in really_interesting]
-
-  headers = ['Benchmark'] + fields
-  rows = []
-  for name in sorted(benchmarks.keys()):
-    if benchmarks[name].skip(): continue
-    rows.append([name] + benchmarks[name].row(fields))
-  note = None
-  if len(badjson_files):
-    note = 'Corrupt JSON data (indicates timeout or crash): \n%s' % fmt_dict(badjson_files)
-  if len(nonexistant_files):
-    if note:
-      note += '\n\nMissing files (indicates new benchmark): \n%s' % fmt_dict(nonexistant_files)
+            note = '\n\nMissing files (indicates new benchmark): \n%s' % fmt_dict(
+                nonexistant_files)
+    if rows:
+        return tabulate.tabulate(rows, headers=headers, floatfmt='+.2f'), note
     else:
-      note = '\n\nMissing files (indicates new benchmark): \n%s' % fmt_dict(nonexistant_files)
-  if rows:
-    return tabulate.tabulate(rows, headers=headers, floatfmt='+.2f'), note
-  else:
-    return None, note
+        return None, note
 
 
 if __name__ == '__main__':
-  args = _args()
-  diff, note = diff(args.benchmarks, args.loops, args.regex, args.track, args.old,
-            args.new, args.counters)
-  print('%s\n%s' % (note, diff if diff else "No performance differences"))
+    args = _args()
+    diff, note = diff(args.benchmarks, args.loops, args.regex, args.track,
+                      args.old, args.new, args.counters)
+    print('%s\n%s' % (note, diff if diff else "No performance differences"))
diff --git a/tools/profiling/microbenchmarks/bm_diff/bm_main.py b/tools/profiling/microbenchmarks/bm_diff/bm_main.py
index 74b7174f5d..137c22bf8e 100755
--- a/tools/profiling/microbenchmarks/bm_diff/bm_main.py
+++ b/tools/profiling/microbenchmarks/bm_diff/bm_main.py
@@ -13,7 +13,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """ Runs the entire bm_*.py pipeline, and possible comments on the PR """
 
 import bm_constants
@@ -29,129 +28,132 @@ import multiprocessing
 import subprocess
 
 sys.path.append(
-  os.path.join(
-    os.path.dirname(sys.argv[0]), '..', '..', 'run_tests', 'python_utils'))
+    os.path.join(
+        os.path.dirname(sys.argv[0]), '..', '..', 'run_tests', 'python_utils'))
 import comment_on_pr
 
 sys.path.append(
-  os.path.join(
-    os.path.dirname(sys.argv[0]), '..', '..', '..', 'run_tests',
-    'python_utils'))
+    os.path.join(
+        os.path.dirname(sys.argv[0]), '..', '..', '..', 'run_tests',
+        'python_utils'))
 import jobset
 
 
 def _args():
-  argp = argparse.ArgumentParser(
-    description='Perform diff on microbenchmarks')
-  argp.add_argument(
-    '-t',
-    '--track',
-    choices=sorted(bm_constants._INTERESTING),
-    nargs='+',
-    default=sorted(bm_constants._INTERESTING),
-    help='Which metrics to track')
-  argp.add_argument(
-    '-b',
-    '--benchmarks',
-    nargs='+',
-    choices=bm_constants._AVAILABLE_BENCHMARK_TESTS,
-    default=bm_constants._AVAILABLE_BENCHMARK_TESTS,
-    help='Which benchmarks to run')
-  argp.add_argument(
-    '-d',
-    '--diff_base',
-    type=str,
-    help='Commit or branch to compare the current one to')
-  argp.add_argument(
-    '-o',
-    '--old',
-    default='old',
-    type=str,
-    help='Name of baseline run to compare to. Ususally just called "old"')
-  argp.add_argument(
-    '-r',
-    '--regex',
-    type=str,
-    default="",
-    help='Regex to filter benchmarks run')
-  argp.add_argument(
-    '-l',
-    '--loops',
-    type=int,
-    default=10,
-    help='Number of times to loops the benchmarks. More loops cuts down on noise'
-  )
-  argp.add_argument(
-    '-j',
-    '--jobs',
-    type=int,
-    default=multiprocessing.cpu_count(),
-    help='Number of CPUs to use')
-  argp.add_argument(
-    '--pr_comment_name',
-    type=str,
-    default="microbenchmarks",
-    help='Name that Jenkins will use to commen on the PR')
-  argp.add_argument('--counters', dest='counters', action='store_true')
-  argp.add_argument('--no-counters', dest='counters', action='store_false')
-  argp.set_defaults(counters=True)
-  args = argp.parse_args()
-  assert args.diff_base or args.old, "One of diff_base or old must be set!"
-  if args.loops < 3:
-    print "WARNING: This run will likely be noisy. Increase loops."
-  return args
+    argp = argparse.ArgumentParser(
+        description='Perform diff on microbenchmarks')
+    argp.add_argument(
+        '-t',
+        '--track',
+        choices=sorted(bm_constants._INTERESTING),
+        nargs='+',
+        default=sorted(bm_constants._INTERESTING),
+        help='Which metrics to track')
+    argp.add_argument(
+        '-b',
+        '--benchmarks',
+        nargs='+',
+        choices=bm_constants._AVAILABLE_BENCHMARK_TESTS,
+        default=bm_constants._AVAILABLE_BENCHMARK_TESTS,
+        help='Which benchmarks to run')
+    argp.add_argument(
+        '-d',
+        '--diff_base',
+        type=str,
+        help='Commit or branch to compare the current one to')
+    argp.add_argument(
+        '-o',
+        '--old',
+        default='old',
+        type=str,
+        help='Name of baseline run to compare to. Ususally just called "old"')
+    argp.add_argument(
+        '-r',
+        '--regex',
+        type=str,
+        default="",
+        help='Regex to filter benchmarks run')
+    argp.add_argument(
+        '-l',
+        '--loops',
+        type=int,
+        default=10,
+        help='Number of times to loops the benchmarks. More loops cuts down on noise'
+    )
+    argp.add_argument(
+        '-j',
+        '--jobs',
+        type=int,
+        default=multiprocessing.cpu_count(),
+        help='Number of CPUs to use')
+    argp.add_argument(
+        '--pr_comment_name',
+        type=str,
+        default="microbenchmarks",
+        help='Name that Jenkins will use to commen on the PR')
+    argp.add_argument('--counters', dest='counters', action='store_true')
+    argp.add_argument('--no-counters', dest='counters', action='store_false')
+    argp.set_defaults(counters=True)
+    args = argp.parse_args()
+    assert args.diff_base or args.old, "One of diff_base or old must be set!"
+    if args.loops < 3:
+        print "WARNING: This run will likely be noisy. Increase loops."
+    return args
 
 
 def eintr_be_gone(fn):
-  """Run fn until it doesn't stop because of EINTR"""
+    """Run fn until it doesn't stop because of EINTR"""
 
-  def inner(*args):
-    while True:
-      try:
-        return fn(*args)
-      except IOError, e:
-        if e.errno != errno.EINTR:
-          raise
+    def inner(*args):
+        while True:
+            try:
+                return fn(*args)
+            except IOError, e:
+                if e.errno != errno.EINTR:
+                    raise
 
-  return inner
+    return inner
 
 
 def main(args):
 
-  bm_build.build('new', args.benchmarks, args.jobs, args.counters)
-
-  old = args.old
-  if args.diff_base:
-    old = 'old'
-    where_am_i = subprocess.check_output(
-      ['git', 'rev-parse', '--abbrev-ref', 'HEAD']).strip()
-    subprocess.check_call(['git', 'checkout', args.diff_base])
-    try:
-      bm_build.build(old, args.benchmarks, args.jobs, args.counters)
-    finally:
-      subprocess.check_call(['git', 'checkout', where_am_i])
-      subprocess.check_call(['git', 'submodule', 'update'])
-
-  jobs_list = []
-  jobs_list += bm_run.create_jobs('new', args.benchmarks, args.loops, args.regex, args.counters)
-  jobs_list += bm_run.create_jobs(old, args.benchmarks, args.loops, args.regex, args.counters)
-
-  # shuffle all jobs to eliminate noise from GCE CPU drift
-  random.shuffle(jobs_list, random.SystemRandom().random)
-  jobset.run(jobs_list, maxjobs=args.jobs)
-
-  diff, note = bm_diff.diff(args.benchmarks, args.loops, args.regex, args.track, old,
-                'new', args.counters)
-  if diff:
-    text = '[%s] Performance differences noted:\n%s' % (args.pr_comment_name, diff)
-  else:
-    text = '[%s] No significant performance differences' % args.pr_comment_name
-  if note:
-    text = note + '\n\n' + text
-  print('%s' % text)
-  comment_on_pr.comment_on_pr('```\n%s\n```' % text)
+    bm_build.build('new', args.benchmarks, args.jobs, args.counters)
+
+    old = args.old
+    if args.diff_base:
+        old = 'old'
+        where_am_i = subprocess.check_output(
+            ['git', 'rev-parse', '--abbrev-ref', 'HEAD']).strip()
+        subprocess.check_call(['git', 'checkout', args.diff_base])
+        try:
+            bm_build.build(old, args.benchmarks, args.jobs, args.counters)
+        finally:
+            subprocess.check_call(['git', 'checkout', where_am_i])
+            subprocess.check_call(['git', 'submodule', 'update'])
+
+    jobs_list = []
+    jobs_list += bm_run.create_jobs('new', args.benchmarks, args.loops,
+                                    args.regex, args.counters)
+    jobs_list += bm_run.create_jobs(old, args.benchmarks, args.loops,
+                                    args.regex, args.counters)
+
+    # shuffle all jobs to eliminate noise from GCE CPU drift
+    random.shuffle(jobs_list, random.SystemRandom().random)
+    jobset.run(jobs_list, maxjobs=args.jobs)
+
+    diff, note = bm_diff.diff(args.benchmarks, args.loops, args.regex,
+                              args.track, old, 'new', args.counters)
+    if diff:
+        text = '[%s] Performance differences noted:\n%s' % (
+            args.pr_comment_name, diff)
+    else:
+        text = '[%s] No significant performance differences' % args.pr_comment_name
+    if note:
+        text = note + '\n\n' + text
+    print('%s' % text)
+    comment_on_pr.comment_on_pr('```\n%s\n```' % text)
 
 
 if __name__ == '__main__':
-  args = _args()
-  main(args)
+    args = _args()
+    main(args)
diff --git a/tools/profiling/microbenchmarks/bm_diff/bm_run.py b/tools/profiling/microbenchmarks/bm_diff/bm_run.py
index 81db5a226a..08894bbe4d 100755
--- a/tools/profiling/microbenchmarks/bm_diff/bm_run.py
+++ b/tools/profiling/microbenchmarks/bm_diff/bm_run.py
@@ -13,7 +13,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """ Python utility to run opt and counters benchmarks and save json output """
 
 import bm_constants
@@ -27,93 +26,96 @@ import sys
 import os
 
 sys.path.append(
-  os.path.join(
-    os.path.dirname(sys.argv[0]), '..', '..', '..', 'run_tests',
-    'python_utils'))
+    os.path.join(
+        os.path.dirname(sys.argv[0]), '..', '..', '..', 'run_tests',
+        'python_utils'))
 import jobset
 
 
 def _args():
-  argp = argparse.ArgumentParser(description='Runs microbenchmarks')
-  argp.add_argument(
-    '-b',
-    '--benchmarks',
-    nargs='+',
-    choices=bm_constants._AVAILABLE_BENCHMARK_TESTS,
-    default=bm_constants._AVAILABLE_BENCHMARK_TESTS,
-    help='Benchmarks to run')
-  argp.add_argument(
-    '-j',
-    '--jobs',
-    type=int,
-    default=multiprocessing.cpu_count(),
-    help='Number of CPUs to use')
-  argp.add_argument(
-    '-n',
-    '--name',
-    type=str,
-    help='Unique name of the build to run. Needs to match the handle passed to bm_build.py'
-  )
-  argp.add_argument(
-    '-r',
-    '--regex',
-    type=str,
-    default="",
-    help='Regex to filter benchmarks run')
-  argp.add_argument(
-    '-l',
-    '--loops',
-    type=int,
-    default=20,
-    help='Number of times to loops the benchmarks. More loops cuts down on noise'
-  )
-  argp.add_argument('--counters', dest='counters', action='store_true')
-  argp.add_argument('--no-counters', dest='counters', action='store_false')
-  argp.set_defaults(counters=True)
-  args = argp.parse_args()
-  assert args.name
-  if args.loops < 3:
-    print "WARNING: This run will likely be noisy. Increase loops to at least 3."
-  return args
+    argp = argparse.ArgumentParser(description='Runs microbenchmarks')
+    argp.add_argument(
+        '-b',
+        '--benchmarks',
+        nargs='+',
+        choices=bm_constants._AVAILABLE_BENCHMARK_TESTS,
+        default=bm_constants._AVAILABLE_BENCHMARK_TESTS,
+        help='Benchmarks to run')
+    argp.add_argument(
+        '-j',
+        '--jobs',
+        type=int,
+        default=multiprocessing.cpu_count(),
+        help='Number of CPUs to use')
+    argp.add_argument(
+        '-n',
+        '--name',
+        type=str,
+        help='Unique name of the build to run. Needs to match the handle passed to bm_build.py'
+    )
+    argp.add_argument(
+        '-r',
+        '--regex',
+        type=str,
+        default="",
+        help='Regex to filter benchmarks run')
+    argp.add_argument(
+        '-l',
+        '--loops',
+        type=int,
+        default=20,
+        help='Number of times to loops the benchmarks. More loops cuts down on noise'
+    )
+    argp.add_argument('--counters', dest='counters', action='store_true')
+    argp.add_argument('--no-counters', dest='counters', action='store_false')
+    argp.set_defaults(counters=True)
+    args = argp.parse_args()
+    assert args.name
+    if args.loops < 3:
+        print "WARNING: This run will likely be noisy. Increase loops to at least 3."
+    return args
 
 
 def _collect_bm_data(bm, cfg, name, regex, idx, loops):
-  jobs_list = []
-  for line in subprocess.check_output(
-    ['bm_diff_%s/%s/%s' % (name, cfg, bm),
-     '--benchmark_list_tests', '--benchmark_filter=%s' % regex]).splitlines():
-    stripped_line = line.strip().replace("/", "_").replace(
-      "<", "_").replace(">", "_").replace(", ", "_")
-    cmd = [
-      'bm_diff_%s/%s/%s' % (name, cfg, bm), '--benchmark_filter=^%s$' %
-      line, '--benchmark_out=%s.%s.%s.%s.%d.json' %
-      (bm, stripped_line, cfg, name, idx), '--benchmark_out_format=json',
-    ]
-    jobs_list.append(
-      jobset.JobSpec(
-        cmd,
-        shortname='%s %s %s %s %d/%d' % (bm, line, cfg, name, idx + 1,
-                         loops),
-        verbose_success=True,
-        cpu_cost=2,
-        timeout_seconds=60 * 60)) # one hour
-  return jobs_list
+    jobs_list = []
+    for line in subprocess.check_output([
+            'bm_diff_%s/%s/%s' % (name, cfg, bm), '--benchmark_list_tests',
+            '--benchmark_filter=%s' % regex
+    ]).splitlines():
+        stripped_line = line.strip().replace("/", "_").replace(
+            "<", "_").replace(">", "_").replace(", ", "_")
+        cmd = [
+            'bm_diff_%s/%s/%s' % (name, cfg, bm),
+            '--benchmark_filter=^%s$' % line,
+            '--benchmark_out=%s.%s.%s.%s.%d.json' %
+            (bm, stripped_line, cfg, name, idx),
+            '--benchmark_out_format=json',
+        ]
+        jobs_list.append(
+            jobset.JobSpec(
+                cmd,
+                shortname='%s %s %s %s %d/%d' % (bm, line, cfg, name, idx + 1,
+                                                 loops),
+                verbose_success=True,
+                cpu_cost=2,
+                timeout_seconds=60 * 60))  # one hour
+    return jobs_list
 
 
 def create_jobs(name, benchmarks, loops, regex, counters):
-  jobs_list = []
-  for loop in range(0, loops):
-    for bm in benchmarks:
-      jobs_list += _collect_bm_data(bm, 'opt', name, regex, loop, loops)
-      if counters:
-        jobs_list += _collect_bm_data(bm, 'counters', name, regex, loop,
-                        loops)
-  random.shuffle(jobs_list, random.SystemRandom().random)
-  return jobs_list
+    jobs_list = []
+    for loop in range(0, loops):
+        for bm in benchmarks:
+            jobs_list += _collect_bm_data(bm, 'opt', name, regex, loop, loops)
+            if counters:
+                jobs_list += _collect_bm_data(bm, 'counters', name, regex, loop,
+                                              loops)
+    random.shuffle(jobs_list, random.SystemRandom().random)
+    return jobs_list
 
 
 if __name__ == '__main__':
-  args = _args()
-  jobs_list = create_jobs(args.name, args.benchmarks, args.loops, 
-                          args.regex, args.counters)
-  jobset.run(jobs_list, maxjobs=args.jobs)
+    args = _args()
+    jobs_list = create_jobs(args.name, args.benchmarks, args.loops, args.regex,
+                            args.counters)
+    jobset.run(jobs_list, maxjobs=args.jobs)
diff --git a/tools/profiling/microbenchmarks/bm_diff/bm_speedup.py b/tools/profiling/microbenchmarks/bm_diff/bm_speedup.py
index 63e691af02..2a77040360 100755
--- a/tools/profiling/microbenchmarks/bm_diff/bm_speedup.py
+++ b/tools/profiling/microbenchmarks/bm_diff/bm_speedup.py
@@ -19,40 +19,41 @@ import math
 
 _DEFAULT_THRESHOLD = 1e-10
 
+
 def scale(a, mul):
-  return [x * mul for x in a]
+    return [x * mul for x in a]
 
 
 def cmp(a, b):
-  return stats.ttest_ind(a, b)
-
-
-def speedup(new, old, threshold = _DEFAULT_THRESHOLD):
-  if (len(set(new))) == 1 and new == old: return 0
-  s0, p0 = cmp(new, old)
-  if math.isnan(p0): return 0
-  if s0 == 0: return 0
-  if p0 > threshold: return 0
-  if s0 < 0:
-    pct = 1
-    while pct < 100:
-      sp, pp = cmp(new, scale(old, 1 - pct / 100.0))
-      if sp > 0: break
-      if pp > threshold: break
-      pct += 1
-    return -(pct - 1)
-  else:
-    pct = 1
-    while pct < 10000:
-      sp, pp = cmp(new, scale(old, 1 + pct / 100.0))
-      if sp < 0: break
-      if pp > threshold: break
-      pct += 1
-    return pct - 1
+    return stats.ttest_ind(a, b)
+
+
+def speedup(new, old, threshold=_DEFAULT_THRESHOLD):
+    if (len(set(new))) == 1 and new == old: return 0
+    s0, p0 = cmp(new, old)
+    if math.isnan(p0): return 0
+    if s0 == 0: return 0
+    if p0 > threshold: return 0
+    if s0 < 0:
+        pct = 1
+        while pct < 100:
+            sp, pp = cmp(new, scale(old, 1 - pct / 100.0))
+            if sp > 0: break
+            if pp > threshold: break
+            pct += 1
+        return -(pct - 1)
+    else:
+        pct = 1
+        while pct < 10000:
+            sp, pp = cmp(new, scale(old, 1 + pct / 100.0))
+            if sp < 0: break
+            if pp > threshold: break
+            pct += 1
+        return pct - 1
 
 
 if __name__ == "__main__":
-  new = [0.0, 0.0, 0.0, 0.0] 
-  old = [2.96608e-06, 3.35076e-06, 3.45384e-06, 3.34407e-06]
-  print speedup(new, old, 1e-5)
-  print speedup(old, new, 1e-5)
+    new = [0.0, 0.0, 0.0, 0.0]
+    old = [2.96608e-06, 3.35076e-06, 3.45384e-06, 3.34407e-06]
+    print speedup(new, old, 1e-5)
+    print speedup(old, new, 1e-5)
diff --git a/tools/profiling/microbenchmarks/bm_json.py b/tools/profiling/microbenchmarks/bm_json.py
index eb450ee6ad..1dd9f65dbf 100644
--- a/tools/profiling/microbenchmarks/bm_json.py
+++ b/tools/profiling/microbenchmarks/bm_json.py
@@ -15,187 +15,196 @@
 import os
 
 _BM_SPECS = {
-  'BM_UnaryPingPong': {
-    'tpl': ['fixture', 'client_mutator', 'server_mutator'],
-    'dyn': ['request_size', 'response_size'],
-  },
-  'BM_PumpStreamClientToServer': {
-    'tpl': ['fixture'],
-    'dyn': ['request_size'],
-  },
-  'BM_PumpStreamServerToClient': {
-    'tpl': ['fixture'],
-    'dyn': ['request_size'],
-  },
-  'BM_StreamingPingPong': {
-    'tpl': ['fixture', 'client_mutator', 'server_mutator'],
-    'dyn': ['request_size', 'request_count'],
-  },
-  'BM_StreamingPingPongMsgs': {
-    'tpl': ['fixture', 'client_mutator', 'server_mutator'],
-    'dyn': ['request_size'],
-  },
-  'BM_PumpStreamServerToClient_Trickle': {
-    'tpl': [],
-    'dyn': ['request_size', 'bandwidth_kilobits'],
-  },
-  'BM_PumpUnbalancedUnary_Trickle': {
-    'tpl': [],
-    'dyn': ['cli_req_size', 'svr_req_size', 'bandwidth_kilobits'],
-  },
-  'BM_ErrorStringOnNewError': {
-    'tpl': ['fixture'],
-    'dyn': [],
-  },
-  'BM_ErrorStringRepeatedly': {
-    'tpl': ['fixture'],
-    'dyn': [],
-  },
-  'BM_ErrorGetStatus': {
-    'tpl': ['fixture'],
-    'dyn': [],
-  },
-  'BM_ErrorGetStatusCode': {
-    'tpl': ['fixture'],
-    'dyn': [],
-  },
-  'BM_ErrorHttpError': {
-    'tpl': ['fixture'],
-    'dyn': [],
-  },
-  'BM_HasClearGrpcStatus': {
-    'tpl': ['fixture'],
-    'dyn': [],
-  },
-  'BM_IsolatedFilter': {
-    'tpl': ['fixture', 'client_mutator'],
-    'dyn': [],
-  },
-  'BM_HpackEncoderEncodeHeader': {
-    'tpl': ['fixture'],
-    'dyn': ['end_of_stream', 'request_size'],
-  },
-  'BM_HpackParserParseHeader': {
-    'tpl': ['fixture', 'on_header'],
-    'dyn': [],
-  },
-  'BM_CallCreateDestroy': {
-    'tpl': ['fixture'],
-    'dyn': [],
-  },
-  'BM_Zalloc': {
-    'tpl': [],
-    'dyn': ['request_size'],
-  },
-  'BM_PollEmptyPollset_SpeedOfLight': {
-    'tpl': [],
-    'dyn': ['request_size', 'request_count'],
-  },
-  'BM_StreamCreateSendInitialMetadataDestroy': {
-    'tpl': ['fixture'],
-    'dyn': [],
-  },
-  'BM_TransportStreamSend': {
-    'tpl': [],
-    'dyn': ['request_size'],
-  },
-  'BM_TransportStreamRecv': {
-    'tpl': [],
-    'dyn': ['request_size'],
-  },
-  'BM_StreamingPingPongWithCoalescingApi': {
-    'tpl': ['fixture', 'client_mutator', 'server_mutator'],
-    'dyn': ['request_size', 'request_count', 'end_of_stream'],
-  },
-  'BM_Base16SomeStuff': {
-    'tpl': [],
-    'dyn': ['request_size'],
-  }
+    'BM_UnaryPingPong': {
+        'tpl': ['fixture', 'client_mutator', 'server_mutator'],
+        'dyn': ['request_size', 'response_size'],
+    },
+    'BM_PumpStreamClientToServer': {
+        'tpl': ['fixture'],
+        'dyn': ['request_size'],
+    },
+    'BM_PumpStreamServerToClient': {
+        'tpl': ['fixture'],
+        'dyn': ['request_size'],
+    },
+    'BM_StreamingPingPong': {
+        'tpl': ['fixture', 'client_mutator', 'server_mutator'],
+        'dyn': ['request_size', 'request_count'],
+    },
+    'BM_StreamingPingPongMsgs': {
+        'tpl': ['fixture', 'client_mutator', 'server_mutator'],
+        'dyn': ['request_size'],
+    },
+    'BM_PumpStreamServerToClient_Trickle': {
+        'tpl': [],
+        'dyn': ['request_size', 'bandwidth_kilobits'],
+    },
+    'BM_PumpUnbalancedUnary_Trickle': {
+        'tpl': [],
+        'dyn': ['cli_req_size', 'svr_req_size', 'bandwidth_kilobits'],
+    },
+    'BM_ErrorStringOnNewError': {
+        'tpl': ['fixture'],
+        'dyn': [],
+    },
+    'BM_ErrorStringRepeatedly': {
+        'tpl': ['fixture'],
+        'dyn': [],
+    },
+    'BM_ErrorGetStatus': {
+        'tpl': ['fixture'],
+        'dyn': [],
+    },
+    'BM_ErrorGetStatusCode': {
+        'tpl': ['fixture'],
+        'dyn': [],
+    },
+    'BM_ErrorHttpError': {
+        'tpl': ['fixture'],
+        'dyn': [],
+    },
+    'BM_HasClearGrpcStatus': {
+        'tpl': ['fixture'],
+        'dyn': [],
+    },
+    'BM_IsolatedFilter': {
+        'tpl': ['fixture', 'client_mutator'],
+        'dyn': [],
+    },
+    'BM_HpackEncoderEncodeHeader': {
+        'tpl': ['fixture'],
+        'dyn': ['end_of_stream', 'request_size'],
+    },
+    'BM_HpackParserParseHeader': {
+        'tpl': ['fixture', 'on_header'],
+        'dyn': [],
+    },
+    'BM_CallCreateDestroy': {
+        'tpl': ['fixture'],
+        'dyn': [],
+    },
+    'BM_Zalloc': {
+        'tpl': [],
+        'dyn': ['request_size'],
+    },
+    'BM_PollEmptyPollset_SpeedOfLight': {
+        'tpl': [],
+        'dyn': ['request_size', 'request_count'],
+    },
+    'BM_StreamCreateSendInitialMetadataDestroy': {
+        'tpl': ['fixture'],
+        'dyn': [],
+    },
+    'BM_TransportStreamSend': {
+        'tpl': [],
+        'dyn': ['request_size'],
+    },
+    'BM_TransportStreamRecv': {
+        'tpl': [],
+        'dyn': ['request_size'],
+    },
+    'BM_StreamingPingPongWithCoalescingApi': {
+        'tpl': ['fixture', 'client_mutator', 'server_mutator'],
+        'dyn': ['request_size', 'request_count', 'end_of_stream'],
+    },
+    'BM_Base16SomeStuff': {
+        'tpl': [],
+        'dyn': ['request_size'],
+    }
 }
 
+
 def numericalize(s):
-  if not s: return ''
-  if s[-1] == 'k':
-    return float(s[:-1]) * 1024
-  if s[-1] == 'M':
-    return float(s[:-1]) * 1024 * 1024
-  if 0 <= (ord(s[-1]) - ord('0')) <= 9:
-    return float(s)
-  assert 'not a number: %s' % s
+    if not s: return ''
+    if s[-1] == 'k':
+        return float(s[:-1]) * 1024
+    if s[-1] == 'M':
+        return float(s[:-1]) * 1024 * 1024
+    if 0 <= (ord(s[-1]) - ord('0')) <= 9:
+        return float(s)
+    assert 'not a number: %s' % s
+
 
 def parse_name(name):
-  cpp_name = name
-  if '<' not in name and '/' not in name and name not in _BM_SPECS:
-    return {'name': name, 'cpp_name': name}
-  rest = name
-  out = {}
-  tpl_args = []
-  dyn_args = []
-  if '<' in rest:
-    tpl_bit = rest[rest.find('<') + 1 : rest.rfind('>')]
-    arg = ''
-    nesting = 0
-    for c in tpl_bit:
-      if c == '<':
-        nesting += 1
-        arg += c
-      elif c == '>':
-        nesting -= 1
-        arg += c
-      elif c == ',':
-        if nesting == 0:
-          tpl_args.append(arg.strip())
-          arg = ''
-        else:
-          arg += c
-      else:
-        arg += c
-    tpl_args.append(arg.strip())
-    rest = rest[:rest.find('<')] + rest[rest.rfind('>') + 1:]
-  if '/' in rest:
-    s = rest.split('/')
-    rest = s[0]
-    dyn_args = s[1:]
-  name = rest
-  print (name)
-  print (dyn_args, _BM_SPECS[name]['dyn'])
-  print (tpl_args, _BM_SPECS[name]['tpl'])
-  assert name in _BM_SPECS, '_BM_SPECS needs to be expanded for %s' % name
-  assert len(dyn_args) == len(_BM_SPECS[name]['dyn'])
-  assert len(tpl_args) == len(_BM_SPECS[name]['tpl'])
-  out['name'] = name
-  out['cpp_name'] = cpp_name
-  out.update(dict((k, numericalize(v)) for k, v in zip(_BM_SPECS[name]['dyn'], dyn_args)))
-  out.update(dict(zip(_BM_SPECS[name]['tpl'], tpl_args)))
-  return out
+    cpp_name = name
+    if '<' not in name and '/' not in name and name not in _BM_SPECS:
+        return {'name': name, 'cpp_name': name}
+    rest = name
+    out = {}
+    tpl_args = []
+    dyn_args = []
+    if '<' in rest:
+        tpl_bit = rest[rest.find('<') + 1:rest.rfind('>')]
+        arg = ''
+        nesting = 0
+        for c in tpl_bit:
+            if c == '<':
+                nesting += 1
+                arg += c
+            elif c == '>':
+                nesting -= 1
+                arg += c
+            elif c == ',':
+                if nesting == 0:
+                    tpl_args.append(arg.strip())
+                    arg = ''
+                else:
+                    arg += c
+            else:
+                arg += c
+        tpl_args.append(arg.strip())
+        rest = rest[:rest.find('<')] + rest[rest.rfind('>') + 1:]
+    if '/' in rest:
+        s = rest.split('/')
+        rest = s[0]
+        dyn_args = s[1:]
+    name = rest
+    print(name)
+    print(dyn_args, _BM_SPECS[name]['dyn'])
+    print(tpl_args, _BM_SPECS[name]['tpl'])
+    assert name in _BM_SPECS, '_BM_SPECS needs to be expanded for %s' % name
+    assert len(dyn_args) == len(_BM_SPECS[name]['dyn'])
+    assert len(tpl_args) == len(_BM_SPECS[name]['tpl'])
+    out['name'] = name
+    out['cpp_name'] = cpp_name
+    out.update(
+        dict((k, numericalize(v))
+             for k, v in zip(_BM_SPECS[name]['dyn'], dyn_args)))
+    out.update(dict(zip(_BM_SPECS[name]['tpl'], tpl_args)))
+    return out
 
-def expand_json(js, js2 = None):
-  if not js and not js2: raise StopIteration()
-  if not js: js = js2
-  for bm in js['benchmarks']:
-    if bm['name'].endswith('_stddev') or bm['name'].endswith('_mean'): continue
-    context = js['context']
-    if 'label' in bm:
-      labels_list = [s.split(':') for s in bm['label'].strip().split(' ') if len(s) and s[0] != '#']
-      for el in labels_list:
-        el[0] = el[0].replace('/iter', '_per_iteration')
-      labels = dict(labels_list)
-    else:
-      labels = {}
-    row = {
-      'jenkins_build': os.environ.get('BUILD_NUMBER', ''),
-      'jenkins_job': os.environ.get('JOB_NAME', ''),
-    }
-    row.update(context)
-    row.update(bm)
-    row.update(parse_name(row['name']))
-    row.update(labels)
-    if js2:
-      for bm2 in js2['benchmarks']:
-        if bm['name'] == bm2['name'] and 'already_used' not in bm2:
-          row['cpu_time'] = bm2['cpu_time']
-          row['real_time'] = bm2['real_time']
-          row['iterations'] = bm2['iterations']
-          bm2['already_used'] = True
-          break
-    yield row
+
+def expand_json(js, js2=None):
+    if not js and not js2: raise StopIteration()
+    if not js: js = js2
+    for bm in js['benchmarks']:
+        if bm['name'].endswith('_stddev') or bm['name'].endswith('_mean'):
+            continue
+        context = js['context']
+        if 'label' in bm:
+            labels_list = [
+                s.split(':') for s in bm['label'].strip().split(' ')
+                if len(s) and s[0] != '#'
+            ]
+            for el in labels_list:
+                el[0] = el[0].replace('/iter', '_per_iteration')
+            labels = dict(labels_list)
+        else:
+            labels = {}
+        row = {
+            'jenkins_build': os.environ.get('BUILD_NUMBER', ''),
+            'jenkins_job': os.environ.get('JOB_NAME', ''),
+        }
+        row.update(context)
+        row.update(bm)
+        row.update(parse_name(row['name']))
+        row.update(labels)
+        if js2:
+            for bm2 in js2['benchmarks']:
+                if bm['name'] == bm2['name'] and 'already_used' not in bm2:
+                    row['cpu_time'] = bm2['cpu_time']
+                    row['real_time'] = bm2['real_time']
+                    row['iterations'] = bm2['iterations']
+                    bm2['already_used'] = True
+                    break
+        yield row
diff --git a/tools/profiling/qps/qps_diff.py b/tools/profiling/qps/qps_diff.py
index 0654f45666..55a81f034d 100755
--- a/tools/profiling/qps/qps_diff.py
+++ b/tools/profiling/qps/qps_diff.py
@@ -26,144 +26,146 @@ import sys
 import tabulate
 
 sys.path.append(
-  os.path.join(
-    os.path.dirname(sys.argv[0]), '..', 'microbenchmarks', 'bm_diff'))
+    os.path.join(
+        os.path.dirname(sys.argv[0]), '..', 'microbenchmarks', 'bm_diff'))
 import bm_speedup
 
 sys.path.append(
-  os.path.join(
-    os.path.dirname(sys.argv[0]), '..', '..', 'run_tests', 'python_utils'))
+    os.path.join(
+        os.path.dirname(sys.argv[0]), '..', '..', 'run_tests', 'python_utils'))
 import comment_on_pr
 
 
 def _args():
-  argp = argparse.ArgumentParser(
-    description='Perform diff on QPS Driver')
-  argp.add_argument(
-    '-d',
-    '--diff_base',
-    type=str,
-    help='Commit or branch to compare the current one to')
-  argp.add_argument(
-    '-l',
-    '--loops',
-    type=int,
-    default=4,
-    help='Number of loops for each benchmark. More loops cuts down on noise'
-  )
-  argp.add_argument(
-    '-j',
-    '--jobs',
-    type=int,
-    default=multiprocessing.cpu_count(),
-    help='Number of CPUs to use')
-  args = argp.parse_args()
-  assert args.diff_base, "diff_base must be set"
-  return args
+    argp = argparse.ArgumentParser(description='Perform diff on QPS Driver')
+    argp.add_argument(
+        '-d',
+        '--diff_base',
+        type=str,
+        help='Commit or branch to compare the current one to')
+    argp.add_argument(
+        '-l',
+        '--loops',
+        type=int,
+        default=4,
+        help='Number of loops for each benchmark. More loops cuts down on noise')
+    argp.add_argument(
+        '-j',
+        '--jobs',
+        type=int,
+        default=multiprocessing.cpu_count(),
+        help='Number of CPUs to use')
+    args = argp.parse_args()
+    assert args.diff_base, "diff_base must be set"
+    return args
 
 
 def _make_cmd(jobs):
-  return ['make', '-j', '%d' % jobs, 'qps_json_driver', 'qps_worker']
+    return ['make', '-j', '%d' % jobs, 'qps_json_driver', 'qps_worker']
 
 
 def build(name, jobs):
-  shutil.rmtree('qps_diff_%s' % name, ignore_errors=True)
-  subprocess.check_call(['git', 'submodule', 'update'])
-  try:
-    subprocess.check_call(_make_cmd(jobs))
-  except subprocess.CalledProcessError, e:
-    subprocess.check_call(['make', 'clean'])
-    subprocess.check_call(_make_cmd(jobs))
-  os.rename('bins', 'qps_diff_%s' % name)
+    shutil.rmtree('qps_diff_%s' % name, ignore_errors=True)
+    subprocess.check_call(['git', 'submodule', 'update'])
+    try:
+        subprocess.check_call(_make_cmd(jobs))
+    except subprocess.CalledProcessError, e:
+        subprocess.check_call(['make', 'clean'])
+        subprocess.check_call(_make_cmd(jobs))
+    os.rename('bins', 'qps_diff_%s' % name)
 
 
 def _run_cmd(name, scenario, fname):
-  return ['qps_diff_%s/opt/qps_json_driver' % name, '--scenarios_json', scenario, '--json_file_out', fname]
+    return [
+        'qps_diff_%s/opt/qps_json_driver' % name, '--scenarios_json', scenario,
+        '--json_file_out', fname
+    ]
 
 
 def run(name, scenarios, loops):
-  for sn in scenarios:
-    for i in range(0, loops):
-      fname = "%s.%s.%d.json" % (sn, name, i)
-      subprocess.check_call(_run_cmd(name, scenarios[sn], fname))
+    for sn in scenarios:
+        for i in range(0, loops):
+            fname = "%s.%s.%d.json" % (sn, name, i)
+            subprocess.check_call(_run_cmd(name, scenarios[sn], fname))
 
 
 def _load_qps(fname):
-  try:
-    with open(fname) as f:
-      return json.loads(f.read())['qps']
-  except IOError, e:
-    print("IOError occurred reading file: %s" % fname)
-    return None
-  except ValueError, e:
-    print("ValueError occurred reading file: %s" % fname)
-    return None
+    try:
+        with open(fname) as f:
+            return json.loads(f.read())['qps']
+    except IOError, e:
+        print("IOError occurred reading file: %s" % fname)
+        return None
+    except ValueError, e:
+        print("ValueError occurred reading file: %s" % fname)
+        return None
 
 
 def _median(ary):
-  assert (len(ary))
-  ary = sorted(ary)
-  n = len(ary)
-  if n % 2 == 0:
-    return (ary[(n - 1) / 2] + ary[(n - 1) / 2 + 1]) / 2.0
-  else:
-    return ary[n / 2]
+    assert (len(ary))
+    ary = sorted(ary)
+    n = len(ary)
+    if n % 2 == 0:
+        return (ary[(n - 1) / 2] + ary[(n - 1) / 2 + 1]) / 2.0
+    else:
+        return ary[n / 2]
 
 
 def diff(scenarios, loops, old, new):
-  old_data = {}
-  new_data = {}
-
-  # collect data
-  for sn in scenarios:
-    old_data[sn] = []
-    new_data[sn] = []
-    for i in range(loops):
-      old_data[sn].append(_load_qps("%s.%s.%d.json" % (sn, old, i)))
-      new_data[sn].append(_load_qps("%s.%s.%d.json" % (sn, new, i)))
-
-  # crunch data
-  headers = ['Benchmark', 'qps']
-  rows = []
-  for sn in scenarios:
-    mdn_diff = abs(_median(new_data[sn]) - _median(old_data[sn]))
-    print('%s: %s=%r %s=%r mdn_diff=%r' % (sn, new, new_data[sn], old, old_data[sn], mdn_diff))
-    s = bm_speedup.speedup(new_data[sn], old_data[sn], 10e-5)
-    if abs(s) > 3 and mdn_diff > 0.5:
-      rows.append([sn, '%+d%%' % s])
-
-  if rows:
-    return tabulate.tabulate(rows, headers=headers, floatfmt='+.2f')
-  else:
-    return None
+    old_data = {}
+    new_data = {}
+
+    # collect data
+    for sn in scenarios:
+        old_data[sn] = []
+        new_data[sn] = []
+        for i in range(loops):
+            old_data[sn].append(_load_qps("%s.%s.%d.json" % (sn, old, i)))
+            new_data[sn].append(_load_qps("%s.%s.%d.json" % (sn, new, i)))
+
+    # crunch data
+    headers = ['Benchmark', 'qps']
+    rows = []
+    for sn in scenarios:
+        mdn_diff = abs(_median(new_data[sn]) - _median(old_data[sn]))
+        print('%s: %s=%r %s=%r mdn_diff=%r' %
+              (sn, new, new_data[sn], old, old_data[sn], mdn_diff))
+        s = bm_speedup.speedup(new_data[sn], old_data[sn], 10e-5)
+        if abs(s) > 3 and mdn_diff > 0.5:
+            rows.append([sn, '%+d%%' % s])
+
+    if rows:
+        return tabulate.tabulate(rows, headers=headers, floatfmt='+.2f')
+    else:
+        return None
 
 
 def main(args):
-  build('new', args.jobs)
+    build('new', args.jobs)
 
-  if args.diff_base:
-    where_am_i = subprocess.check_output(
-      ['git', 'rev-parse', '--abbrev-ref', 'HEAD']).strip()
-    subprocess.check_call(['git', 'checkout', args.diff_base])
-    try:
-      build('old', args.jobs)
-    finally:
-      subprocess.check_call(['git', 'checkout', where_am_i])
-      subprocess.check_call(['git', 'submodule', 'update'])
+    if args.diff_base:
+        where_am_i = subprocess.check_output(
+            ['git', 'rev-parse', '--abbrev-ref', 'HEAD']).strip()
+        subprocess.check_call(['git', 'checkout', args.diff_base])
+        try:
+            build('old', args.jobs)
+        finally:
+            subprocess.check_call(['git', 'checkout', where_am_i])
+            subprocess.check_call(['git', 'submodule', 'update'])
 
-  run('new', qps_scenarios._SCENARIOS, args.loops)
-  run('old', qps_scenarios._SCENARIOS, args.loops)
+    run('new', qps_scenarios._SCENARIOS, args.loops)
+    run('old', qps_scenarios._SCENARIOS, args.loops)
 
-  diff_output = diff(qps_scenarios._SCENARIOS, args.loops, 'old', 'new')
+    diff_output = diff(qps_scenarios._SCENARIOS, args.loops, 'old', 'new')
 
-  if diff_output:
-    text = '[qps] Performance differences noted:\n%s' % diff_output
-  else:
-    text = '[qps] No significant performance differences'
-  print('%s' % text)
-  comment_on_pr.comment_on_pr('```\n%s\n```' % text)
+    if diff_output:
+        text = '[qps] Performance differences noted:\n%s' % diff_output
+    else:
+        text = '[qps] No significant performance differences'
+    print('%s' % text)
+    comment_on_pr.comment_on_pr('```\n%s\n```' % text)
 
 
 if __name__ == '__main__':
-  args = _args()
-  main(args)
+    args = _args()
+    main(args)
diff --git a/tools/profiling/qps/qps_scenarios.py b/tools/profiling/qps/qps_scenarios.py
index 4fbbdefc4d..532acc915c 100644
--- a/tools/profiling/qps/qps_scenarios.py
+++ b/tools/profiling/qps/qps_scenarios.py
@@ -14,6 +14,8 @@
 """ QPS Scenarios to run """
 
 _SCENARIOS = {
-  'large-message-throughput': '{"scenarios":[{"name":"large-message-throughput", "spawn_local_worker_count": -2, "warmup_seconds": 30, "benchmark_seconds": 270, "num_servers": 1, "server_config": {"async_server_threads": 1, "security_params": null, "server_type": "ASYNC_SERVER"}, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "payload_config": {"simple_params": {"resp_size": 1048576, "req_size": 1048576}}, "client_channels": 1, "async_client_threads": 1, "outstanding_rpcs_per_channel": 1, "rpc_type": "UNARY", "load_params": {"closed_loop": {}}, "histogram_params": {"max_possible": 60000000000.0, "resolution": 0.01}}}]}',
-  'multi-channel-64-KiB': '{"scenarios":[{"name":"multi-channel-64-KiB", "spawn_local_worker_count": -3, "warmup_seconds": 30, "benchmark_seconds": 270, "num_servers": 1, "server_config": {"async_server_threads": 31, "security_params": null, "server_type": "ASYNC_SERVER"}, "num_clients": 2, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "payload_config": {"simple_params": {"resp_size": 65536, "req_size": 65536}}, "client_channels": 32, "async_client_threads": 31, "outstanding_rpcs_per_channel": 100, "rpc_type": "UNARY", "load_params": {"closed_loop": {}}, "histogram_params": {"max_possible": 60000000000.0, "resolution": 0.01}}}]}'
+    'large-message-throughput':
+    '{"scenarios":[{"name":"large-message-throughput", "spawn_local_worker_count": -2, "warmup_seconds": 30, "benchmark_seconds": 270, "num_servers": 1, "server_config": {"async_server_threads": 1, "security_params": null, "server_type": "ASYNC_SERVER"}, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "payload_config": {"simple_params": {"resp_size": 1048576, "req_size": 1048576}}, "client_channels": 1, "async_client_threads": 1, "outstanding_rpcs_per_channel": 1, "rpc_type": "UNARY", "load_params": {"closed_loop": {}}, "histogram_params": {"max_possible": 60000000000.0, "resolution": 0.01}}}]}',
+    'multi-channel-64-KiB':
+    '{"scenarios":[{"name":"multi-channel-64-KiB", "spawn_local_worker_count": -3, "warmup_seconds": 30, "benchmark_seconds": 270, "num_servers": 1, "server_config": {"async_server_threads": 31, "security_params": null, "server_type": "ASYNC_SERVER"}, "num_clients": 2, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "payload_config": {"simple_params": {"resp_size": 65536, "req_size": 65536}}, "client_channels": 32, "async_client_threads": 31, "outstanding_rpcs_per_channel": 100, "rpc_type": "UNARY", "load_params": {"closed_loop": {}}, "histogram_params": {"max_possible": 60000000000.0, "resolution": 0.01}}}]}'
 }
diff --git a/tools/run_tests/artifacts/artifact_targets.py b/tools/run_tests/artifacts/artifact_targets.py
index ea202edb30..dc0803b3c7 100644
--- a/tools/run_tests/artifacts/artifact_targets.py
+++ b/tools/run_tests/artifacts/artifact_targets.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Definition of targets to build artifacts."""
 
 import os.path
@@ -24,316 +23,350 @@ sys.path.insert(0, os.path.abspath('..'))
 import python_utils.jobset as jobset
 
 
-def create_docker_jobspec(name, dockerfile_dir, shell_command, environ={},
-                   flake_retries=0, timeout_retries=0, timeout_seconds=30*60,
-                   docker_base_image=None, extra_docker_args=None):
-  """Creates jobspec for a task running under docker."""
-  environ = environ.copy()
-  environ['RUN_COMMAND'] = shell_command
-  environ['ARTIFACTS_OUT'] = 'artifacts/%s' % name
-
-  docker_args=[]
-  for k,v in environ.items():
-    docker_args += ['-e', '%s=%s' % (k, v)]
-  docker_env = {'DOCKERFILE_DIR': dockerfile_dir,
-                'DOCKER_RUN_SCRIPT': 'tools/run_tests/dockerize/docker_run.sh',
-                'OUTPUT_DIR': 'artifacts'}
-
-  if docker_base_image is not None:
-    docker_env['DOCKER_BASE_IMAGE'] = docker_base_image
-  if extra_docker_args is not None:
-    docker_env['EXTRA_DOCKER_ARGS'] = extra_docker_args
-  jobspec = jobset.JobSpec(
-          cmdline=['tools/run_tests/dockerize/build_and_run_docker.sh'] + docker_args,
-          environ=docker_env,
-          shortname='build_artifact.%s' % (name),
-          timeout_seconds=timeout_seconds,
-          flake_retries=flake_retries,
-          timeout_retries=timeout_retries)
-  return jobspec
-
-
-def create_jobspec(name, cmdline, environ={}, shell=False,
-                   flake_retries=0, timeout_retries=0, timeout_seconds=30*60,
+def create_docker_jobspec(name,
+                          dockerfile_dir,
+                          shell_command,
+                          environ={},
+                          flake_retries=0,
+                          timeout_retries=0,
+                          timeout_seconds=30 * 60,
+                          docker_base_image=None,
+                          extra_docker_args=None):
+    """Creates jobspec for a task running under docker."""
+    environ = environ.copy()
+    environ['RUN_COMMAND'] = shell_command
+    environ['ARTIFACTS_OUT'] = 'artifacts/%s' % name
+
+    docker_args = []
+    for k, v in environ.items():
+        docker_args += ['-e', '%s=%s' % (k, v)]
+    docker_env = {
+        'DOCKERFILE_DIR': dockerfile_dir,
+        'DOCKER_RUN_SCRIPT': 'tools/run_tests/dockerize/docker_run.sh',
+        'OUTPUT_DIR': 'artifacts'
+    }
+
+    if docker_base_image is not None:
+        docker_env['DOCKER_BASE_IMAGE'] = docker_base_image
+    if extra_docker_args is not None:
+        docker_env['EXTRA_DOCKER_ARGS'] = extra_docker_args
+    jobspec = jobset.JobSpec(
+        cmdline=['tools/run_tests/dockerize/build_and_run_docker.sh'] +
+        docker_args,
+        environ=docker_env,
+        shortname='build_artifact.%s' % (name),
+        timeout_seconds=timeout_seconds,
+        flake_retries=flake_retries,
+        timeout_retries=timeout_retries)
+    return jobspec
+
+
+def create_jobspec(name,
+                   cmdline,
+                   environ={},
+                   shell=False,
+                   flake_retries=0,
+                   timeout_retries=0,
+                   timeout_seconds=30 * 60,
                    use_workspace=False,
                    cpu_cost=1.0):
-  """Creates jobspec."""
-  environ = environ.copy()
-  if use_workspace:
-    environ['WORKSPACE_NAME'] = 'workspace_%s' % name
-    environ['ARTIFACTS_OUT'] = os.path.join('..', 'artifacts', name)
-    cmdline = ['bash',
-               'tools/run_tests/artifacts/run_in_workspace.sh'] + cmdline
-  else:
-    environ['ARTIFACTS_OUT'] = os.path.join('artifacts', name)
-
-  jobspec = jobset.JobSpec(
-          cmdline=cmdline,
-          environ=environ,
-          shortname='build_artifact.%s' % (name),
-          timeout_seconds=timeout_seconds,
-          flake_retries=flake_retries,
-          timeout_retries=timeout_retries,
-          shell=shell,
-          cpu_cost=cpu_cost)
-  return jobspec
+    """Creates jobspec."""
+    environ = environ.copy()
+    if use_workspace:
+        environ['WORKSPACE_NAME'] = 'workspace_%s' % name
+        environ['ARTIFACTS_OUT'] = os.path.join('..', 'artifacts', name)
+        cmdline = ['bash', 'tools/run_tests/artifacts/run_in_workspace.sh'
+                  ] + cmdline
+    else:
+        environ['ARTIFACTS_OUT'] = os.path.join('artifacts', name)
+
+    jobspec = jobset.JobSpec(
+        cmdline=cmdline,
+        environ=environ,
+        shortname='build_artifact.%s' % (name),
+        timeout_seconds=timeout_seconds,
+        flake_retries=flake_retries,
+        timeout_retries=timeout_retries,
+        shell=shell,
+        cpu_cost=cpu_cost)
+    return jobspec
 
 
 _MACOS_COMPAT_FLAG = '-mmacosx-version-min=10.7'
 
-_ARCH_FLAG_MAP = {
-  'x86': '-m32',
-  'x64': '-m64'
-}
+_ARCH_FLAG_MAP = {'x86': '-m32', 'x64': '-m64'}
 
 
 class PythonArtifact:
-  """Builds Python artifacts."""
-
-  def __init__(self, platform, arch, py_version):
-    self.name = 'python_%s_%s_%s' % (platform, arch, py_version)
-    self.platform = platform
-    self.arch = arch
-    self.labels = ['artifact', 'python', platform, arch, py_version]
-    self.py_version = py_version
-
-  def pre_build_jobspecs(self):
-    return []
-
-  def build_jobspec(self):
-    environ = {}
-    if self.platform == 'linux_extra':
-      # Raspberry Pi build
-      environ['PYTHON'] = '/usr/local/bin/python{}'.format(self.py_version)
-      environ['PIP'] = '/usr/local/bin/pip{}'.format(self.py_version)
-      # https://github.com/resin-io-projects/armv7hf-debian-qemu/issues/9
-      # A QEMU bug causes submodule update to hang, so we copy directly
-      environ['RELATIVE_COPY_PATH'] = '.'
-      extra_args = ' --entrypoint=/usr/bin/qemu-arm-static '
-      return create_docker_jobspec(self.name,
-          'tools/dockerfile/grpc_artifact_linux_{}'.format(self.arch),
-          'tools/run_tests/artifacts/build_artifact_python.sh',
-          environ=environ,
-          timeout_seconds=60*60*5,
-          docker_base_image='quay.io/grpc/raspbian_{}'.format(self.arch),
-          extra_docker_args=extra_args)
-    elif self.platform == 'linux':
-      if self.arch == 'x86':
-        environ['SETARCH_CMD'] = 'linux32'
-      # Inside the manylinux container, the python installations are located in
-      # special places...
-      environ['PYTHON'] = '/opt/python/{}/bin/python'.format(self.py_version)
-      environ['PIP'] = '/opt/python/{}/bin/pip'.format(self.py_version)
-      # Platform autodetection for the manylinux1 image breaks so we set the
-      # defines ourselves.
-      # TODO(atash) get better platform-detection support in core so we don't
-      # need to do this manually...
-      environ['CFLAGS'] = '-DGPR_MANYLINUX1=1'
-      environ['GRPC_BUILD_GRPCIO_TOOLS_DEPENDENTS'] = 'TRUE'
-      environ['GRPC_BUILD_MANYLINUX_WHEEL'] = 'TRUE'
-      return create_docker_jobspec(self.name,
-          'tools/dockerfile/grpc_artifact_python_manylinux_%s' % self.arch,
-          'tools/run_tests/artifacts/build_artifact_python.sh',
-          environ=environ,
-          timeout_seconds=60*60,
-          docker_base_image='quay.io/pypa/manylinux1_i686' if self.arch == 'x86' else 'quay.io/pypa/manylinux1_x86_64')
-    elif self.platform == 'windows':
-      if 'Python27' in self.py_version or 'Python34' in self.py_version:
-        environ['EXT_COMPILER'] = 'mingw32'
-      else:
-        environ['EXT_COMPILER'] = 'msvc'
-      # For some reason, the batch script %random% always runs with the same
-      # seed.  We create a random temp-dir here
-      dir = ''.join(random.choice(string.ascii_uppercase) for _ in range(10))
-      return create_jobspec(self.name,
-                            ['tools\\run_tests\\artifacts\\build_artifact_python.bat',
-                             self.py_version,
-                             '32' if self.arch == 'x86' else '64'],
-                            environ=environ,
-                            timeout_seconds=45*60,
-                            use_workspace=True)
-    else:
-      environ['PYTHON'] = self.py_version
-      environ['SKIP_PIP_INSTALL'] = 'TRUE'
-      return create_jobspec(self.name,
-                            ['tools/run_tests/artifacts/build_artifact_python.sh'],
-                            environ=environ,
-                            timeout_seconds=60*60,
-                            use_workspace=True)
-
-  def __str__(self):
-    return self.name
+    """Builds Python artifacts."""
+
+    def __init__(self, platform, arch, py_version):
+        self.name = 'python_%s_%s_%s' % (platform, arch, py_version)
+        self.platform = platform
+        self.arch = arch
+        self.labels = ['artifact', 'python', platform, arch, py_version]
+        self.py_version = py_version
+
+    def pre_build_jobspecs(self):
+        return []
+
+    def build_jobspec(self):
+        environ = {}
+        if self.platform == 'linux_extra':
+            # Raspberry Pi build
+            environ['PYTHON'] = '/usr/local/bin/python{}'.format(
+                self.py_version)
+            environ['PIP'] = '/usr/local/bin/pip{}'.format(self.py_version)
+            # https://github.com/resin-io-projects/armv7hf-debian-qemu/issues/9
+            # A QEMU bug causes submodule update to hang, so we copy directly
+            environ['RELATIVE_COPY_PATH'] = '.'
+            extra_args = ' --entrypoint=/usr/bin/qemu-arm-static '
+            return create_docker_jobspec(
+                self.name,
+                'tools/dockerfile/grpc_artifact_linux_{}'.format(self.arch),
+                'tools/run_tests/artifacts/build_artifact_python.sh',
+                environ=environ,
+                timeout_seconds=60 * 60 * 5,
+                docker_base_image='quay.io/grpc/raspbian_{}'.format(self.arch),
+                extra_docker_args=extra_args)
+        elif self.platform == 'linux':
+            if self.arch == 'x86':
+                environ['SETARCH_CMD'] = 'linux32'
+            # Inside the manylinux container, the python installations are located in
+            # special places...
+            environ['PYTHON'] = '/opt/python/{}/bin/python'.format(
+                self.py_version)
+            environ['PIP'] = '/opt/python/{}/bin/pip'.format(self.py_version)
+            # Platform autodetection for the manylinux1 image breaks so we set the
+            # defines ourselves.
+            # TODO(atash) get better platform-detection support in core so we don't
+            # need to do this manually...
+            environ['CFLAGS'] = '-DGPR_MANYLINUX1=1'
+            environ['GRPC_BUILD_GRPCIO_TOOLS_DEPENDENTS'] = 'TRUE'
+            environ['GRPC_BUILD_MANYLINUX_WHEEL'] = 'TRUE'
+            return create_docker_jobspec(
+                self.name,
+                'tools/dockerfile/grpc_artifact_python_manylinux_%s' %
+                self.arch,
+                'tools/run_tests/artifacts/build_artifact_python.sh',
+                environ=environ,
+                timeout_seconds=60 * 60,
+                docker_base_image='quay.io/pypa/manylinux1_i686'
+                if self.arch == 'x86' else 'quay.io/pypa/manylinux1_x86_64')
+        elif self.platform == 'windows':
+            if 'Python27' in self.py_version or 'Python34' in self.py_version:
+                environ['EXT_COMPILER'] = 'mingw32'
+            else:
+                environ['EXT_COMPILER'] = 'msvc'
+            # For some reason, the batch script %random% always runs with the same
+            # seed.  We create a random temp-dir here
+            dir = ''.join(
+                random.choice(string.ascii_uppercase) for _ in range(10))
+            return create_jobspec(
+                self.name, [
+                    'tools\\run_tests\\artifacts\\build_artifact_python.bat',
+                    self.py_version, '32' if self.arch == 'x86' else '64'
+                ],
+                environ=environ,
+                timeout_seconds=45 * 60,
+                use_workspace=True)
+        else:
+            environ['PYTHON'] = self.py_version
+            environ['SKIP_PIP_INSTALL'] = 'TRUE'
+            return create_jobspec(
+                self.name,
+                ['tools/run_tests/artifacts/build_artifact_python.sh'],
+                environ=environ,
+                timeout_seconds=60 * 60,
+                use_workspace=True)
+
+    def __str__(self):
+        return self.name
 
 
 class RubyArtifact:
-  """Builds ruby native gem."""
+    """Builds ruby native gem."""
 
-  def __init__(self, platform, arch):
-    self.name = 'ruby_native_gem_%s_%s' % (platform, arch)
-    self.platform = platform
-    self.arch = arch
-    self.labels = ['artifact', 'ruby', platform, arch]
+    def __init__(self, platform, arch):
+        self.name = 'ruby_native_gem_%s_%s' % (platform, arch)
+        self.platform = platform
+        self.arch = arch
+        self.labels = ['artifact', 'ruby', platform, arch]
 
-  def pre_build_jobspecs(self):
-    return []
+    def pre_build_jobspecs(self):
+        return []
 
-  def build_jobspec(self):
-    # Ruby build uses docker internally and docker cannot be nested.
-    # We are using a custom workspace instead.
-    return create_jobspec(self.name,
-                          ['tools/run_tests/artifacts/build_artifact_ruby.sh'],
-                          use_workspace=True,
-                          timeout_seconds=45*60)
+    def build_jobspec(self):
+        # Ruby build uses docker internally and docker cannot be nested.
+        # We are using a custom workspace instead.
+        return create_jobspec(
+            self.name, ['tools/run_tests/artifacts/build_artifact_ruby.sh'],
+            use_workspace=True,
+            timeout_seconds=45 * 60)
 
 
 class CSharpExtArtifact:
-  """Builds C# native extension library"""
-
-  def __init__(self, platform, arch):
-    self.name = 'csharp_ext_%s_%s' % (platform, arch)
-    self.platform = platform
-    self.arch = arch
-    self.labels = ['artifact', 'csharp', platform, arch]
-
-  def pre_build_jobspecs(self):
-    return []
-
-  def build_jobspec(self):
-    if self.platform == 'windows':
-      cmake_arch_option = 'Win32' if self.arch == 'x86' else self.arch
-      return create_jobspec(self.name,
-                            ['tools\\run_tests\\artifacts\\build_artifact_csharp.bat',
-                             cmake_arch_option],
-                            use_workspace=True)
-    else:
-      environ = {'CONFIG': 'opt',
-                 'EMBED_OPENSSL': 'true',
-                 'EMBED_ZLIB': 'true',
-                 'CFLAGS': '-DGPR_BACKWARDS_COMPATIBILITY_MODE',
-                 'CXXFLAGS': '-DGPR_BACKWARDS_COMPATIBILITY_MODE',
-                 'LDFLAGS': ''}
-      if self.platform == 'linux':
-        return create_docker_jobspec(self.name,
-            'tools/dockerfile/grpc_artifact_linux_%s' % self.arch,
-            'tools/run_tests/artifacts/build_artifact_csharp.sh',
-            environ=environ)
-      else:
-        archflag = _ARCH_FLAG_MAP[self.arch]
-        environ['CFLAGS'] += ' %s %s' % (archflag, _MACOS_COMPAT_FLAG)
-        environ['CXXFLAGS'] += ' %s %s' % (archflag, _MACOS_COMPAT_FLAG)
-        environ['LDFLAGS'] += ' %s' % archflag
-        return create_jobspec(self.name,
-                              ['tools/run_tests/artifacts/build_artifact_csharp.sh'],
-                              environ=environ,
-                              use_workspace=True)
-
-  def __str__(self):
-    return self.name
+    """Builds C# native extension library"""
+
+    def __init__(self, platform, arch):
+        self.name = 'csharp_ext_%s_%s' % (platform, arch)
+        self.platform = platform
+        self.arch = arch
+        self.labels = ['artifact', 'csharp', platform, arch]
+
+    def pre_build_jobspecs(self):
+        return []
+
+    def build_jobspec(self):
+        if self.platform == 'windows':
+            cmake_arch_option = 'Win32' if self.arch == 'x86' else self.arch
+            return create_jobspec(
+                self.name, [
+                    'tools\\run_tests\\artifacts\\build_artifact_csharp.bat',
+                    cmake_arch_option
+                ],
+                use_workspace=True)
+        else:
+            environ = {
+                'CONFIG': 'opt',
+                'EMBED_OPENSSL': 'true',
+                'EMBED_ZLIB': 'true',
+                'CFLAGS': '-DGPR_BACKWARDS_COMPATIBILITY_MODE',
+                'CXXFLAGS': '-DGPR_BACKWARDS_COMPATIBILITY_MODE',
+                'LDFLAGS': ''
+            }
+            if self.platform == 'linux':
+                return create_docker_jobspec(
+                    self.name,
+                    'tools/dockerfile/grpc_artifact_linux_%s' % self.arch,
+                    'tools/run_tests/artifacts/build_artifact_csharp.sh',
+                    environ=environ)
+            else:
+                archflag = _ARCH_FLAG_MAP[self.arch]
+                environ['CFLAGS'] += ' %s %s' % (archflag, _MACOS_COMPAT_FLAG)
+                environ['CXXFLAGS'] += ' %s %s' % (archflag, _MACOS_COMPAT_FLAG)
+                environ['LDFLAGS'] += ' %s' % archflag
+                return create_jobspec(
+                    self.name,
+                    ['tools/run_tests/artifacts/build_artifact_csharp.sh'],
+                    environ=environ,
+                    use_workspace=True)
+
+    def __str__(self):
+        return self.name
+
 
 class PHPArtifact:
-  """Builds PHP PECL package"""
-
-  def __init__(self, platform, arch):
-    self.name = 'php_pecl_package_{0}_{1}'.format(platform, arch)
-    self.platform = platform
-    self.arch = arch
-    self.labels = ['artifact', 'php', platform, arch]
-
-  def pre_build_jobspecs(self):
-    return []
-
-  def build_jobspec(self):
-    if self.platform == 'linux':
-      return create_docker_jobspec(
-          self.name,
-          'tools/dockerfile/grpc_artifact_linux_{}'.format(self.arch),
-          'tools/run_tests/artifacts/build_artifact_php.sh')
-    else:
-      return create_jobspec(self.name,
-                            ['tools/run_tests/artifacts/build_artifact_php.sh'],
-                            use_workspace=True)
+    """Builds PHP PECL package"""
 
-class ProtocArtifact:
-  """Builds protoc and protoc-plugin artifacts"""
-
-  def __init__(self, platform, arch):
-    self.name = 'protoc_%s_%s' % (platform, arch)
-    self.platform = platform
-    self.arch = arch
-    self.labels = ['artifact', 'protoc', platform, arch]
-
-  def pre_build_jobspecs(self):
-      return []
-
-  def build_jobspec(self):
-    if self.platform != 'windows':
-      cxxflags = '-DNDEBUG %s' % _ARCH_FLAG_MAP[self.arch]
-      ldflags = '%s' % _ARCH_FLAG_MAP[self.arch]
-      if self.platform != 'macos':
-        ldflags += '  -static-libgcc -static-libstdc++ -s'
-      environ={'CONFIG': 'opt',
-               'CXXFLAGS': cxxflags,
-               'LDFLAGS': ldflags,
-               'PROTOBUF_LDFLAGS_EXTRA': ldflags}
-      if self.platform == 'linux':
-        return create_docker_jobspec(self.name,
-            'tools/dockerfile/grpc_artifact_protoc',
-            'tools/run_tests/artifacts/build_artifact_protoc.sh',
-            environ=environ)
-      else:
-        environ['CXXFLAGS'] += ' -std=c++11 -stdlib=libc++ %s' % _MACOS_COMPAT_FLAG
-        return create_jobspec(self.name,
-            ['tools/run_tests/artifacts/build_artifact_protoc.sh'],
-            environ=environ,
-            use_workspace=True)
-    else:
-      generator = 'Visual Studio 14 2015 Win64' if self.arch == 'x64' else 'Visual Studio 14 2015'
-      return create_jobspec(self.name,
-                            ['tools\\run_tests\\artifacts\\build_artifact_protoc.bat'],
-                            environ={'generator': generator},
-                            use_workspace=True)
+    def __init__(self, platform, arch):
+        self.name = 'php_pecl_package_{0}_{1}'.format(platform, arch)
+        self.platform = platform
+        self.arch = arch
+        self.labels = ['artifact', 'php', platform, arch]
+
+    def pre_build_jobspecs(self):
+        return []
 
-  def __str__(self):
-    return self.name
+    def build_jobspec(self):
+        if self.platform == 'linux':
+            return create_docker_jobspec(
+                self.name,
+                'tools/dockerfile/grpc_artifact_linux_{}'.format(self.arch),
+                'tools/run_tests/artifacts/build_artifact_php.sh')
+        else:
+            return create_jobspec(
+                self.name, ['tools/run_tests/artifacts/build_artifact_php.sh'],
+                use_workspace=True)
+
+
+class ProtocArtifact:
+    """Builds protoc and protoc-plugin artifacts"""
+
+    def __init__(self, platform, arch):
+        self.name = 'protoc_%s_%s' % (platform, arch)
+        self.platform = platform
+        self.arch = arch
+        self.labels = ['artifact', 'protoc', platform, arch]
+
+    def pre_build_jobspecs(self):
+        return []
+
+    def build_jobspec(self):
+        if self.platform != 'windows':
+            cxxflags = '-DNDEBUG %s' % _ARCH_FLAG_MAP[self.arch]
+            ldflags = '%s' % _ARCH_FLAG_MAP[self.arch]
+            if self.platform != 'macos':
+                ldflags += '  -static-libgcc -static-libstdc++ -s'
+            environ = {
+                'CONFIG': 'opt',
+                'CXXFLAGS': cxxflags,
+                'LDFLAGS': ldflags,
+                'PROTOBUF_LDFLAGS_EXTRA': ldflags
+            }
+            if self.platform == 'linux':
+                return create_docker_jobspec(
+                    self.name,
+                    'tools/dockerfile/grpc_artifact_protoc',
+                    'tools/run_tests/artifacts/build_artifact_protoc.sh',
+                    environ=environ)
+            else:
+                environ[
+                    'CXXFLAGS'] += ' -std=c++11 -stdlib=libc++ %s' % _MACOS_COMPAT_FLAG
+                return create_jobspec(
+                    self.name,
+                    ['tools/run_tests/artifacts/build_artifact_protoc.sh'],
+                    environ=environ,
+                    use_workspace=True)
+        else:
+            generator = 'Visual Studio 14 2015 Win64' if self.arch == 'x64' else 'Visual Studio 14 2015'
+            return create_jobspec(
+                self.name,
+                ['tools\\run_tests\\artifacts\\build_artifact_protoc.bat'],
+                environ={'generator': generator},
+                use_workspace=True)
+
+    def __str__(self):
+        return self.name
 
 
 def targets():
-  """Gets list of supported targets"""
-  return ([Cls(platform, arch)
-           for Cls in (CSharpExtArtifact, ProtocArtifact)
-           for platform in ('linux', 'macos', 'windows')
-           for arch in ('x86', 'x64')] +
-          [PythonArtifact('linux', 'x86', 'cp27-cp27m'),
-           PythonArtifact('linux', 'x86', 'cp27-cp27mu'),
-           PythonArtifact('linux', 'x86', 'cp34-cp34m'),
-           PythonArtifact('linux', 'x86', 'cp35-cp35m'),
-           PythonArtifact('linux', 'x86', 'cp36-cp36m'),
-           PythonArtifact('linux_extra', 'armv7', '2.7'),
-           PythonArtifact('linux_extra', 'armv7', '3.4'),
-           PythonArtifact('linux_extra', 'armv7', '3.5'),
-           PythonArtifact('linux_extra', 'armv7', '3.6'),
-           PythonArtifact('linux_extra', 'armv6', '2.7'),
-           PythonArtifact('linux_extra', 'armv6', '3.4'),
-           PythonArtifact('linux_extra', 'armv6', '3.5'),
-           PythonArtifact('linux_extra', 'armv6', '3.6'),
-           PythonArtifact('linux', 'x64', 'cp27-cp27m'),
-           PythonArtifact('linux', 'x64', 'cp27-cp27mu'),
-           PythonArtifact('linux', 'x64', 'cp34-cp34m'),
-           PythonArtifact('linux', 'x64', 'cp35-cp35m'),
-           PythonArtifact('linux', 'x64', 'cp36-cp36m'),
-           PythonArtifact('macos', 'x64', 'python2.7'),
-           PythonArtifact('macos', 'x64', 'python3.4'),
-           PythonArtifact('macos', 'x64', 'python3.5'),
-           PythonArtifact('macos', 'x64', 'python3.6'),
-           PythonArtifact('windows', 'x86', 'Python27_32bits'),
-           PythonArtifact('windows', 'x86', 'Python34_32bits'),
-           PythonArtifact('windows', 'x86', 'Python35_32bits'),
-           PythonArtifact('windows', 'x86', 'Python36_32bits'),
-           PythonArtifact('windows', 'x64', 'Python27'),
-           PythonArtifact('windows', 'x64', 'Python34'),
-           PythonArtifact('windows', 'x64', 'Python35'),
-           PythonArtifact('windows', 'x64', 'Python36'),
-           RubyArtifact('linux', 'x64'),
-           RubyArtifact('macos', 'x64'),
-           PHPArtifact('linux', 'x64'),
-           PHPArtifact('macos', 'x64')])
+    """Gets list of supported targets"""
+    return ([
+        Cls(platform, arch)
+        for Cls in (CSharpExtArtifact, ProtocArtifact)
+        for platform in ('linux', 'macos', 'windows') for arch in ('x86', 'x64')
+    ] + [
+        PythonArtifact('linux', 'x86', 'cp27-cp27m'), PythonArtifact(
+            'linux', 'x86', 'cp27-cp27mu'), PythonArtifact(
+                'linux', 'x86', 'cp34-cp34m'), PythonArtifact(
+                    'linux', 'x86', 'cp35-cp35m'), PythonArtifact(
+                        'linux', 'x86', 'cp36-cp36m'), PythonArtifact(
+                            'linux_extra', 'armv7', '2.7'), PythonArtifact(
+                                'linux_extra', 'armv7', '3.4'), PythonArtifact(
+                                    'linux_extra', 'armv7', '3.5'),
+        PythonArtifact('linux_extra', 'armv7', '3.6'), PythonArtifact(
+            'linux_extra', 'armv6', '2.7'), PythonArtifact(
+                'linux_extra', 'armv6', '3.4'), PythonArtifact(
+                    'linux_extra', 'armv6', '3.5'), PythonArtifact(
+                        'linux_extra', 'armv6', '3.6'), PythonArtifact(
+                            'linux', 'x64', 'cp27-cp27m'), PythonArtifact(
+                                'linux', 'x64', 'cp27-cp27mu'), PythonArtifact(
+                                    'linux', 'x64', 'cp34-cp34m'),
+        PythonArtifact('linux', 'x64', 'cp35-cp35m'), PythonArtifact(
+            'linux', 'x64', 'cp36-cp36m'), PythonArtifact(
+                'macos', 'x64', 'python2.7'), PythonArtifact(
+                    'macos', 'x64', 'python3.4'), PythonArtifact('macos', 'x64',
+                                                                 'python3.5'),
+        PythonArtifact('macos', 'x64', 'python3.6'), PythonArtifact(
+            'windows', 'x86', 'Python27_32bits'), PythonArtifact(
+                'windows', 'x86', 'Python34_32bits'), PythonArtifact(
+                    'windows', 'x86', 'Python35_32bits'), PythonArtifact(
+                        'windows', 'x86', 'Python36_32bits'), PythonArtifact(
+                            'windows', 'x64', 'Python27'),
+        PythonArtifact('windows', 'x64', 'Python34'), PythonArtifact(
+            'windows', 'x64', 'Python35'), PythonArtifact(
+                'windows', 'x64', 'Python36'), RubyArtifact(
+                    'linux', 'x64'), RubyArtifact('macos', 'x64'), PHPArtifact(
+                        'linux', 'x64'), PHPArtifact('macos', 'x64')
+    ])
diff --git a/tools/run_tests/artifacts/distribtest_targets.py b/tools/run_tests/artifacts/distribtest_targets.py
index 7ba0e0ebc9..83f656b433 100644
--- a/tools/run_tests/artifacts/distribtest_targets.py
+++ b/tools/run_tests/artifacts/distribtest_targets.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Definition of targets run distribution package tests."""
 
 import os.path
@@ -22,280 +21,306 @@ sys.path.insert(0, os.path.abspath('..'))
 import python_utils.jobset as jobset
 
 
-def create_docker_jobspec(name, dockerfile_dir, shell_command, environ={},
-                   flake_retries=0, timeout_retries=0,
-                   copy_rel_path=None):
-  """Creates jobspec for a task running under docker."""
-  environ = environ.copy()
-  environ['RUN_COMMAND'] = shell_command
-  # the entire repo will be cloned if copy_rel_path is not set.
-  if copy_rel_path:
-    environ['RELATIVE_COPY_PATH'] = copy_rel_path
-
-  docker_args=[]
-  for k,v in environ.items():
-    docker_args += ['-e', '%s=%s' % (k, v)]
-  docker_env = {'DOCKERFILE_DIR': dockerfile_dir,
-                'DOCKER_RUN_SCRIPT': 'tools/run_tests/dockerize/docker_run.sh'}
-  jobspec = jobset.JobSpec(
-          cmdline=['tools/run_tests/dockerize/build_and_run_docker.sh'] + docker_args,
-          environ=docker_env,
-          shortname='distribtest.%s' % (name),
-          timeout_seconds=30*60,
-          flake_retries=flake_retries,
-          timeout_retries=timeout_retries)
-  return jobspec
-
-
-def create_jobspec(name, cmdline, environ=None, shell=False,
-                   flake_retries=0, timeout_retries=0,
+def create_docker_jobspec(name,
+                          dockerfile_dir,
+                          shell_command,
+                          environ={},
+                          flake_retries=0,
+                          timeout_retries=0,
+                          copy_rel_path=None):
+    """Creates jobspec for a task running under docker."""
+    environ = environ.copy()
+    environ['RUN_COMMAND'] = shell_command
+    # the entire repo will be cloned if copy_rel_path is not set.
+    if copy_rel_path:
+        environ['RELATIVE_COPY_PATH'] = copy_rel_path
+
+    docker_args = []
+    for k, v in environ.items():
+        docker_args += ['-e', '%s=%s' % (k, v)]
+    docker_env = {
+        'DOCKERFILE_DIR': dockerfile_dir,
+        'DOCKER_RUN_SCRIPT': 'tools/run_tests/dockerize/docker_run.sh'
+    }
+    jobspec = jobset.JobSpec(
+        cmdline=['tools/run_tests/dockerize/build_and_run_docker.sh'] +
+        docker_args,
+        environ=docker_env,
+        shortname='distribtest.%s' % (name),
+        timeout_seconds=30 * 60,
+        flake_retries=flake_retries,
+        timeout_retries=timeout_retries)
+    return jobspec
+
+
+def create_jobspec(name,
+                   cmdline,
+                   environ=None,
+                   shell=False,
+                   flake_retries=0,
+                   timeout_retries=0,
                    use_workspace=False,
-                   timeout_seconds=10*60):
-  """Creates jobspec."""
-  environ = environ.copy()
-  if use_workspace:
-    environ['WORKSPACE_NAME'] = 'workspace_%s' % name
-    cmdline = ['bash',
-               'tools/run_tests/artifacts/run_in_workspace.sh'] + cmdline
-  jobspec = jobset.JobSpec(
-          cmdline=cmdline,
-          environ=environ,
-          shortname='distribtest.%s' % (name),
-          timeout_seconds=timeout_seconds,
-          flake_retries=flake_retries,
-          timeout_retries=timeout_retries,
-          shell=shell)
-  return jobspec
+                   timeout_seconds=10 * 60):
+    """Creates jobspec."""
+    environ = environ.copy()
+    if use_workspace:
+        environ['WORKSPACE_NAME'] = 'workspace_%s' % name
+        cmdline = ['bash', 'tools/run_tests/artifacts/run_in_workspace.sh'
+                  ] + cmdline
+    jobspec = jobset.JobSpec(
+        cmdline=cmdline,
+        environ=environ,
+        shortname='distribtest.%s' % (name),
+        timeout_seconds=timeout_seconds,
+        flake_retries=flake_retries,
+        timeout_retries=timeout_retries,
+        shell=shell)
+    return jobspec
 
 
 class CSharpDistribTest(object):
-  """Tests C# NuGet package"""
-
-  def __init__(self, platform, arch, docker_suffix=None, use_dotnet_cli=False):
-    self.name = 'csharp_%s_%s' % (platform, arch)
-    self.platform = platform
-    self.arch = arch
-    self.docker_suffix = docker_suffix
-    self.labels = ['distribtest', 'csharp', platform, arch]
-    self.script_suffix = ''
-    if docker_suffix:
-      self.name += '_%s' % docker_suffix
-      self.labels.append(docker_suffix)
-    if use_dotnet_cli:
-      self.name += '_dotnetcli'
-      self.script_suffix = '_dotnetcli'
-      self.labels.append('dotnetcli')
-    else:
-      self.labels.append('olddotnet')
-
-  def pre_build_jobspecs(self):
-    return []
-
-  def build_jobspec(self):
-    if self.platform == 'linux':
-      return create_docker_jobspec(self.name,
-          'tools/dockerfile/distribtest/csharp_%s_%s' % (
-              self.docker_suffix,
-              self.arch),
-          'test/distrib/csharp/run_distrib_test%s.sh' % self.script_suffix,
-          copy_rel_path='test/distrib')
-    elif self.platform == 'macos':
-      return create_jobspec(self.name,
-          ['test/distrib/csharp/run_distrib_test%s.sh' % self.script_suffix],
-          environ={'EXTERNAL_GIT_ROOT': '../../../..'},
-          use_workspace=True)
-    elif self.platform == 'windows':
-      if self.arch == 'x64':
-        # Use double leading / as the first occurence gets removed by msys bash
-        # when invoking the .bat file (side-effect of posix path conversion)
-        environ={'MSBUILD_EXTRA_ARGS': '//p:Platform=x64',
-                 'DISTRIBTEST_OUTPATH': 'DistribTest\\bin\\x64\\Debug'}
-      else:
-        environ={'DISTRIBTEST_OUTPATH': 'DistribTest\\bin\\Debug'}
-      return create_jobspec(self.name,
-          ['test\\distrib\\csharp\\run_distrib_test%s.bat' % self.script_suffix],
-          environ=environ,
-          use_workspace=True)
-    else:
-      raise Exception("Not supported yet.")
-
-  def __str__(self):
-    return self.name
+    """Tests C# NuGet package"""
+
+    def __init__(self, platform, arch, docker_suffix=None,
+                 use_dotnet_cli=False):
+        self.name = 'csharp_%s_%s' % (platform, arch)
+        self.platform = platform
+        self.arch = arch
+        self.docker_suffix = docker_suffix
+        self.labels = ['distribtest', 'csharp', platform, arch]
+        self.script_suffix = ''
+        if docker_suffix:
+            self.name += '_%s' % docker_suffix
+            self.labels.append(docker_suffix)
+        if use_dotnet_cli:
+            self.name += '_dotnetcli'
+            self.script_suffix = '_dotnetcli'
+            self.labels.append('dotnetcli')
+        else:
+            self.labels.append('olddotnet')
+
+    def pre_build_jobspecs(self):
+        return []
+
+    def build_jobspec(self):
+        if self.platform == 'linux':
+            return create_docker_jobspec(
+                self.name,
+                'tools/dockerfile/distribtest/csharp_%s_%s' % (
+                    self.docker_suffix, self.arch),
+                'test/distrib/csharp/run_distrib_test%s.sh' %
+                self.script_suffix,
+                copy_rel_path='test/distrib')
+        elif self.platform == 'macos':
+            return create_jobspec(
+                self.name, [
+                    'test/distrib/csharp/run_distrib_test%s.sh' %
+                    self.script_suffix
+                ],
+                environ={'EXTERNAL_GIT_ROOT': '../../../..'},
+                use_workspace=True)
+        elif self.platform == 'windows':
+            if self.arch == 'x64':
+                # Use double leading / as the first occurence gets removed by msys bash
+                # when invoking the .bat file (side-effect of posix path conversion)
+                environ = {
+                    'MSBUILD_EXTRA_ARGS': '//p:Platform=x64',
+                    'DISTRIBTEST_OUTPATH': 'DistribTest\\bin\\x64\\Debug'
+                }
+            else:
+                environ = {'DISTRIBTEST_OUTPATH': 'DistribTest\\bin\\Debug'}
+            return create_jobspec(
+                self.name, [
+                    'test\\distrib\\csharp\\run_distrib_test%s.bat' %
+                    self.script_suffix
+                ],
+                environ=environ,
+                use_workspace=True)
+        else:
+            raise Exception("Not supported yet.")
+
+    def __str__(self):
+        return self.name
+
 
 class PythonDistribTest(object):
-  """Tests Python package"""
+    """Tests Python package"""
 
-  def __init__(self, platform, arch, docker_suffix):
-    self.name = 'python_%s_%s_%s' % (platform, arch, docker_suffix)
-    self.platform = platform
-    self.arch = arch
-    self.docker_suffix = docker_suffix
-    self.labels = ['distribtest', 'python', platform, arch, docker_suffix]
+    def __init__(self, platform, arch, docker_suffix):
+        self.name = 'python_%s_%s_%s' % (platform, arch, docker_suffix)
+        self.platform = platform
+        self.arch = arch
+        self.docker_suffix = docker_suffix
+        self.labels = ['distribtest', 'python', platform, arch, docker_suffix]
 
-  def pre_build_jobspecs(self):
-    return []
+    def pre_build_jobspecs(self):
+        return []
 
-  def build_jobspec(self):
-    if not self.platform == 'linux':
-      raise Exception("Not supported yet.")
+    def build_jobspec(self):
+        if not self.platform == 'linux':
+            raise Exception("Not supported yet.")
 
-    return create_docker_jobspec(self.name,
-          'tools/dockerfile/distribtest/python_%s_%s' % (
-              self.docker_suffix,
-              self.arch),
-          'test/distrib/python/run_distrib_test.sh',
-          copy_rel_path='test/distrib')
+        return create_docker_jobspec(
+            self.name,
+            'tools/dockerfile/distribtest/python_%s_%s' % (self.docker_suffix,
+                                                           self.arch),
+            'test/distrib/python/run_distrib_test.sh',
+            copy_rel_path='test/distrib')
 
-  def __str__(self):
-    return self.name
+    def __str__(self):
+        return self.name
 
 
 class RubyDistribTest(object):
-  """Tests Ruby package"""
+    """Tests Ruby package"""
 
-  def __init__(self, platform, arch, docker_suffix):
-    self.name = 'ruby_%s_%s_%s' % (platform, arch, docker_suffix)
-    self.platform = platform
-    self.arch = arch
-    self.docker_suffix = docker_suffix
-    self.labels = ['distribtest', 'ruby', platform, arch, docker_suffix]
+    def __init__(self, platform, arch, docker_suffix):
+        self.name = 'ruby_%s_%s_%s' % (platform, arch, docker_suffix)
+        self.platform = platform
+        self.arch = arch
+        self.docker_suffix = docker_suffix
+        self.labels = ['distribtest', 'ruby', platform, arch, docker_suffix]
 
-  def pre_build_jobspecs(self):
-    return []
+    def pre_build_jobspecs(self):
+        return []
 
-  def build_jobspec(self):
-    if not self.platform == 'linux':
-      raise Exception("Not supported yet.")
+    def build_jobspec(self):
+        if not self.platform == 'linux':
+            raise Exception("Not supported yet.")
 
-    return create_docker_jobspec(self.name,
-          'tools/dockerfile/distribtest/ruby_%s_%s' % (
-              self.docker_suffix,
-              self.arch),
-          'test/distrib/ruby/run_distrib_test.sh',
-          copy_rel_path='test/distrib')
+        return create_docker_jobspec(
+            self.name,
+            'tools/dockerfile/distribtest/ruby_%s_%s' % (self.docker_suffix,
+                                                         self.arch),
+            'test/distrib/ruby/run_distrib_test.sh',
+            copy_rel_path='test/distrib')
 
-  def __str__(self):
-    return self.name
+    def __str__(self):
+        return self.name
 
 
 class PHPDistribTest(object):
-  """Tests PHP package"""
-
-  def __init__(self, platform, arch, docker_suffix=None):
-    self.name = 'php_%s_%s_%s' % (platform, arch, docker_suffix)
-    self.platform = platform
-    self.arch = arch
-    self.docker_suffix = docker_suffix
-    self.labels = ['distribtest', 'php', platform, arch, docker_suffix]
-
-  def pre_build_jobspecs(self):
-    return []
-
-  def build_jobspec(self):
-    if self.platform == 'linux':
-      return create_docker_jobspec(self.name,
-                                   'tools/dockerfile/distribtest/php_%s_%s' % (
-                                       self.docker_suffix,
-                                       self.arch),
-                                   'test/distrib/php/run_distrib_test.sh',
-                                   copy_rel_path='test/distrib')
-    elif self.platform == 'macos':
-      return create_jobspec(self.name,
-          ['test/distrib/php/run_distrib_test.sh'],
-          environ={'EXTERNAL_GIT_ROOT': '../../../..'},
-          use_workspace=True)
-    else:
-      raise Exception("Not supported yet.")
-
-  def __str__(self):
-    return self.name
+    """Tests PHP package"""
+
+    def __init__(self, platform, arch, docker_suffix=None):
+        self.name = 'php_%s_%s_%s' % (platform, arch, docker_suffix)
+        self.platform = platform
+        self.arch = arch
+        self.docker_suffix = docker_suffix
+        self.labels = ['distribtest', 'php', platform, arch, docker_suffix]
+
+    def pre_build_jobspecs(self):
+        return []
+
+    def build_jobspec(self):
+        if self.platform == 'linux':
+            return create_docker_jobspec(
+                self.name,
+                'tools/dockerfile/distribtest/php_%s_%s' % (self.docker_suffix,
+                                                            self.arch),
+                'test/distrib/php/run_distrib_test.sh',
+                copy_rel_path='test/distrib')
+        elif self.platform == 'macos':
+            return create_jobspec(
+                self.name, ['test/distrib/php/run_distrib_test.sh'],
+                environ={'EXTERNAL_GIT_ROOT': '../../../..'},
+                use_workspace=True)
+        else:
+            raise Exception("Not supported yet.")
+
+    def __str__(self):
+        return self.name
 
 
 class CppDistribTest(object):
-  """Tests Cpp make intall by building examples."""
-
-  def __init__(self, platform, arch, docker_suffix=None, testcase=None):
-    if platform == 'linux':
-      self.name = 'cpp_%s_%s_%s_%s' % (platform, arch, docker_suffix, testcase)
-    else:
-      self.name = 'cpp_%s_%s_%s' % (platform, arch, testcase)
-    self.platform = platform
-    self.arch = arch
-    self.docker_suffix = docker_suffix
-    self.testcase = testcase
-    self.labels = ['distribtest', 'cpp', platform, arch, docker_suffix, testcase]
-
-  def pre_build_jobspecs(self):
-    return []
-
-  def build_jobspec(self):
-    if self.platform == 'linux':
-      return create_docker_jobspec(self.name,
-                                   'tools/dockerfile/distribtest/cpp_%s_%s' % (
-                                       self.docker_suffix,
-                                       self.arch),
-                                   'test/distrib/cpp/run_distrib_test_%s.sh' % self.testcase)
-    elif self.platform == 'windows':
-      return create_jobspec(self.name,
-                            ['test\\distrib\\cpp\\run_distrib_test_%s.bat' % self.testcase],
-                            environ={},
-                            timeout_seconds=30*60,
-                            use_workspace=True)
-    else:
-      raise Exception("Not supported yet.")
-
-  def __str__(self):
-    return self.name
+    """Tests Cpp make intall by building examples."""
+
+    def __init__(self, platform, arch, docker_suffix=None, testcase=None):
+        if platform == 'linux':
+            self.name = 'cpp_%s_%s_%s_%s' % (platform, arch, docker_suffix,
+                                             testcase)
+        else:
+            self.name = 'cpp_%s_%s_%s' % (platform, arch, testcase)
+        self.platform = platform
+        self.arch = arch
+        self.docker_suffix = docker_suffix
+        self.testcase = testcase
+        self.labels = [
+            'distribtest', 'cpp', platform, arch, docker_suffix, testcase
+        ]
+
+    def pre_build_jobspecs(self):
+        return []
+
+    def build_jobspec(self):
+        if self.platform == 'linux':
+            return create_docker_jobspec(
+                self.name, 'tools/dockerfile/distribtest/cpp_%s_%s' % (
+                    self.docker_suffix, self.arch),
+                'test/distrib/cpp/run_distrib_test_%s.sh' % self.testcase)
+        elif self.platform == 'windows':
+            return create_jobspec(
+                self.name,
+                ['test\\distrib\\cpp\\run_distrib_test_%s.bat' % self.testcase],
+                environ={},
+                timeout_seconds=30 * 60,
+                use_workspace=True)
+        else:
+            raise Exception("Not supported yet.")
+
+    def __str__(self):
+        return self.name
 
 
 def targets():
-  """Gets list of supported targets"""
-  return [CppDistribTest('linux', 'x64', 'jessie', 'routeguide'),
-          CppDistribTest('linux', 'x64', 'jessie', 'cmake'),
-          CppDistribTest('windows', 'x86', testcase='cmake'),
-          CSharpDistribTest('linux', 'x64', 'wheezy'),
-          CSharpDistribTest('linux', 'x64', 'jessie'),
-          CSharpDistribTest('linux', 'x86', 'jessie'),
-          CSharpDistribTest('linux', 'x64', 'centos7'),
-          CSharpDistribTest('linux', 'x64', 'ubuntu1404'),
-          CSharpDistribTest('linux', 'x64', 'ubuntu1504'),
-          CSharpDistribTest('linux', 'x64', 'ubuntu1510'),
-          CSharpDistribTest('linux', 'x64', 'ubuntu1604'),
-          CSharpDistribTest('linux', 'x64', 'ubuntu1404', use_dotnet_cli=True),
-          CSharpDistribTest('macos', 'x86'),
-          CSharpDistribTest('windows', 'x86'),
-          CSharpDistribTest('windows', 'x64'),
-          PythonDistribTest('linux', 'x64', 'wheezy'),
-          PythonDistribTest('linux', 'x64', 'jessie'),
-          PythonDistribTest('linux', 'x86', 'jessie'),
-          PythonDistribTest('linux', 'x64', 'centos6'),
-          PythonDistribTest('linux', 'x64', 'centos7'),
-          PythonDistribTest('linux', 'x64', 'fedora20'),
-          PythonDistribTest('linux', 'x64', 'fedora21'),
-          PythonDistribTest('linux', 'x64', 'fedora22'),
-          PythonDistribTest('linux', 'x64', 'fedora23'),
-          PythonDistribTest('linux', 'x64', 'opensuse'),
-          PythonDistribTest('linux', 'x64', 'arch'),
-          PythonDistribTest('linux', 'x64', 'ubuntu1204'),
-          PythonDistribTest('linux', 'x64', 'ubuntu1404'),
-          PythonDistribTest('linux', 'x64', 'ubuntu1504'),
-          PythonDistribTest('linux', 'x64', 'ubuntu1510'),
-          PythonDistribTest('linux', 'x64', 'ubuntu1604'),
-          RubyDistribTest('linux', 'x64', 'wheezy'),
-          RubyDistribTest('linux', 'x64', 'jessie'),
-          RubyDistribTest('linux', 'x86', 'jessie'),
-          RubyDistribTest('linux', 'x64', 'centos6'),
-          RubyDistribTest('linux', 'x64', 'centos7'),
-          RubyDistribTest('linux', 'x64', 'fedora20'),
-          RubyDistribTest('linux', 'x64', 'fedora21'),
-          RubyDistribTest('linux', 'x64', 'fedora22'),
-          RubyDistribTest('linux', 'x64', 'fedora23'),
-          RubyDistribTest('linux', 'x64', 'opensuse'),
-          RubyDistribTest('linux', 'x64', 'ubuntu1204'),
-          RubyDistribTest('linux', 'x64', 'ubuntu1404'),
-          RubyDistribTest('linux', 'x64', 'ubuntu1504'),
-          RubyDistribTest('linux', 'x64', 'ubuntu1510'),
-          RubyDistribTest('linux', 'x64', 'ubuntu1604'),
-          PHPDistribTest('linux', 'x64', 'jessie'),
-          PHPDistribTest('macos', 'x64'),
-          ]
+    """Gets list of supported targets"""
+    return [
+        CppDistribTest('linux', 'x64', 'jessie', 'routeguide'),
+        CppDistribTest('linux', 'x64', 'jessie', 'cmake'),
+        CppDistribTest('windows', 'x86', testcase='cmake'),
+        CSharpDistribTest('linux', 'x64', 'wheezy'),
+        CSharpDistribTest('linux', 'x64', 'jessie'),
+        CSharpDistribTest('linux', 'x86', 'jessie'),
+        CSharpDistribTest('linux', 'x64', 'centos7'),
+        CSharpDistribTest('linux', 'x64', 'ubuntu1404'),
+        CSharpDistribTest('linux', 'x64', 'ubuntu1504'),
+        CSharpDistribTest('linux', 'x64', 'ubuntu1510'),
+        CSharpDistribTest('linux', 'x64', 'ubuntu1604'),
+        CSharpDistribTest('linux', 'x64', 'ubuntu1404', use_dotnet_cli=True),
+        CSharpDistribTest('macos', 'x86'),
+        CSharpDistribTest('windows', 'x86'),
+        CSharpDistribTest('windows', 'x64'),
+        PythonDistribTest('linux', 'x64', 'wheezy'),
+        PythonDistribTest('linux', 'x64', 'jessie'),
+        PythonDistribTest('linux', 'x86', 'jessie'),
+        PythonDistribTest('linux', 'x64', 'centos6'),
+        PythonDistribTest('linux', 'x64', 'centos7'),
+        PythonDistribTest('linux', 'x64', 'fedora20'),
+        PythonDistribTest('linux', 'x64', 'fedora21'),
+        PythonDistribTest('linux', 'x64', 'fedora22'),
+        PythonDistribTest('linux', 'x64', 'fedora23'),
+        PythonDistribTest('linux', 'x64', 'opensuse'),
+        PythonDistribTest('linux', 'x64', 'arch'),
+        PythonDistribTest('linux', 'x64', 'ubuntu1204'),
+        PythonDistribTest('linux', 'x64', 'ubuntu1404'),
+        PythonDistribTest('linux', 'x64', 'ubuntu1504'),
+        PythonDistribTest('linux', 'x64', 'ubuntu1510'),
+        PythonDistribTest('linux', 'x64', 'ubuntu1604'),
+        RubyDistribTest('linux', 'x64', 'wheezy'),
+        RubyDistribTest('linux', 'x64', 'jessie'),
+        RubyDistribTest('linux', 'x86', 'jessie'),
+        RubyDistribTest('linux', 'x64', 'centos6'),
+        RubyDistribTest('linux', 'x64', 'centos7'),
+        RubyDistribTest('linux', 'x64', 'fedora20'),
+        RubyDistribTest('linux', 'x64', 'fedora21'),
+        RubyDistribTest('linux', 'x64', 'fedora22'),
+        RubyDistribTest('linux', 'x64', 'fedora23'),
+        RubyDistribTest('linux', 'x64', 'opensuse'),
+        RubyDistribTest('linux', 'x64', 'ubuntu1204'),
+        RubyDistribTest('linux', 'x64', 'ubuntu1404'),
+        RubyDistribTest('linux', 'x64', 'ubuntu1504'),
+        RubyDistribTest('linux', 'x64', 'ubuntu1510'),
+        RubyDistribTest('linux', 'x64', 'ubuntu1604'),
+        PHPDistribTest('linux', 'x64', 'jessie'),
+        PHPDistribTest('macos', 'x64'),
+    ]
diff --git a/tools/run_tests/artifacts/package_targets.py b/tools/run_tests/artifacts/package_targets.py
index ff93bb30e8..52908454f2 100644
--- a/tools/run_tests/artifacts/package_targets.py
+++ b/tools/run_tests/artifacts/package_targets.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Definition of targets to build distribution packages."""
 
 import os.path
@@ -22,128 +21,137 @@ sys.path.insert(0, os.path.abspath('..'))
 import python_utils.jobset as jobset
 
 
-def create_docker_jobspec(name, dockerfile_dir, shell_command, environ={},
-                   flake_retries=0, timeout_retries=0):
-  """Creates jobspec for a task running under docker."""
-  environ = environ.copy()
-  environ['RUN_COMMAND'] = shell_command
-
-  docker_args=[]
-  for k,v in environ.items():
-    docker_args += ['-e', '%s=%s' % (k, v)]
-  docker_env = {'DOCKERFILE_DIR': dockerfile_dir,
-                'DOCKER_RUN_SCRIPT': 'tools/run_tests/dockerize/docker_run.sh',
-                'OUTPUT_DIR': 'artifacts'}
-  jobspec = jobset.JobSpec(
-          cmdline=['tools/run_tests/dockerize/build_and_run_docker.sh'] + docker_args,
-          environ=docker_env,
-          shortname='build_package.%s' % (name),
-          timeout_seconds=30*60,
-          flake_retries=flake_retries,
-          timeout_retries=timeout_retries)
-  return jobspec
-
-def create_jobspec(name, cmdline, environ=None, cwd=None, shell=False,
-                   flake_retries=0, timeout_retries=0):
-  """Creates jobspec."""
-  jobspec = jobset.JobSpec(
-          cmdline=cmdline,
-          environ=environ,
-          cwd=cwd,
-          shortname='build_package.%s' % (name),
-          timeout_seconds=10*60,
-          flake_retries=flake_retries,
-          timeout_retries=timeout_retries,
-          shell=shell)
-  return jobspec
+def create_docker_jobspec(name,
+                          dockerfile_dir,
+                          shell_command,
+                          environ={},
+                          flake_retries=0,
+                          timeout_retries=0):
+    """Creates jobspec for a task running under docker."""
+    environ = environ.copy()
+    environ['RUN_COMMAND'] = shell_command
+
+    docker_args = []
+    for k, v in environ.items():
+        docker_args += ['-e', '%s=%s' % (k, v)]
+    docker_env = {
+        'DOCKERFILE_DIR': dockerfile_dir,
+        'DOCKER_RUN_SCRIPT': 'tools/run_tests/dockerize/docker_run.sh',
+        'OUTPUT_DIR': 'artifacts'
+    }
+    jobspec = jobset.JobSpec(
+        cmdline=['tools/run_tests/dockerize/build_and_run_docker.sh'] +
+        docker_args,
+        environ=docker_env,
+        shortname='build_package.%s' % (name),
+        timeout_seconds=30 * 60,
+        flake_retries=flake_retries,
+        timeout_retries=timeout_retries)
+    return jobspec
+
+
+def create_jobspec(name,
+                   cmdline,
+                   environ=None,
+                   cwd=None,
+                   shell=False,
+                   flake_retries=0,
+                   timeout_retries=0):
+    """Creates jobspec."""
+    jobspec = jobset.JobSpec(
+        cmdline=cmdline,
+        environ=environ,
+        cwd=cwd,
+        shortname='build_package.%s' % (name),
+        timeout_seconds=10 * 60,
+        flake_retries=flake_retries,
+        timeout_retries=timeout_retries,
+        shell=shell)
+    return jobspec
 
 
 class CSharpPackage:
-  """Builds C# nuget packages."""
-
-  def __init__(self, linux=False):
-    self.linux = linux
-    self.labels = ['package', 'csharp']
-    if linux:
-      self.name = 'csharp_package_dotnetcli_linux'
-      self.labels += ['linux']
-    else:
-      self.name = 'csharp_package_dotnetcli_windows'
-      self.labels += ['windows']
-
-  def pre_build_jobspecs(self):
-    return []
-
-  def build_jobspec(self):
-    if self.linux:
-      return create_docker_jobspec(
-          self.name,
-          'tools/dockerfile/test/csharp_jessie_x64',
-          'src/csharp/build_packages_dotnetcli.sh')
-    else:
-      return create_jobspec(self.name,
-                            ['build_packages_dotnetcli.bat'],
-                            cwd='src\\csharp',
-                            shell=True)
-
-  def __str__(self):
-    return self.name
+    """Builds C# nuget packages."""
+
+    def __init__(self, linux=False):
+        self.linux = linux
+        self.labels = ['package', 'csharp']
+        if linux:
+            self.name = 'csharp_package_dotnetcli_linux'
+            self.labels += ['linux']
+        else:
+            self.name = 'csharp_package_dotnetcli_windows'
+            self.labels += ['windows']
+
+    def pre_build_jobspecs(self):
+        return []
+
+    def build_jobspec(self):
+        if self.linux:
+            return create_docker_jobspec(
+                self.name, 'tools/dockerfile/test/csharp_jessie_x64',
+                'src/csharp/build_packages_dotnetcli.sh')
+        else:
+            return create_jobspec(
+                self.name, ['build_packages_dotnetcli.bat'],
+                cwd='src\\csharp',
+                shell=True)
+
+    def __str__(self):
+        return self.name
+
 
 class RubyPackage:
-  """Collects ruby gems created in the artifact phase"""
+    """Collects ruby gems created in the artifact phase"""
 
-  def __init__(self):
-    self.name = 'ruby_package'
-    self.labels = ['package', 'ruby', 'linux']
+    def __init__(self):
+        self.name = 'ruby_package'
+        self.labels = ['package', 'ruby', 'linux']
 
-  def pre_build_jobspecs(self):
-    return []
+    def pre_build_jobspecs(self):
+        return []
 
-  def build_jobspec(self):
-    return create_docker_jobspec(
-        self.name,
-        'tools/dockerfile/grpc_artifact_linux_x64',
-        'tools/run_tests/artifacts/build_package_ruby.sh')
+    def build_jobspec(self):
+        return create_docker_jobspec(
+            self.name, 'tools/dockerfile/grpc_artifact_linux_x64',
+            'tools/run_tests/artifacts/build_package_ruby.sh')
 
 
 class PythonPackage:
-  """Collects python eggs and wheels created in the artifact phase"""
+    """Collects python eggs and wheels created in the artifact phase"""
 
-  def __init__(self):
-    self.name = 'python_package'
-    self.labels = ['package', 'python', 'linux']
+    def __init__(self):
+        self.name = 'python_package'
+        self.labels = ['package', 'python', 'linux']
 
-  def pre_build_jobspecs(self):
-    return []
+    def pre_build_jobspecs(self):
+        return []
 
-  def build_jobspec(self):
-    return create_docker_jobspec(
-        self.name,
-        'tools/dockerfile/grpc_artifact_linux_x64',
-        'tools/run_tests/artifacts/build_package_python.sh')
+    def build_jobspec(self):
+        return create_docker_jobspec(
+            self.name, 'tools/dockerfile/grpc_artifact_linux_x64',
+            'tools/run_tests/artifacts/build_package_python.sh')
 
 
 class PHPPackage:
-  """Copy PHP PECL package artifact"""
+    """Copy PHP PECL package artifact"""
 
-  def __init__(self):
-    self.name = 'php_package'
-    self.labels = ['package', 'php', 'linux']
+    def __init__(self):
+        self.name = 'php_package'
+        self.labels = ['package', 'php', 'linux']
 
-  def pre_build_jobspecs(self):
-    return []
+    def pre_build_jobspecs(self):
+        return []
 
-  def build_jobspec(self):
-    return create_docker_jobspec(
-        self.name,
-        'tools/dockerfile/grpc_artifact_linux_x64',
-        'tools/run_tests/artifacts/build_package_php.sh')
+    def build_jobspec(self):
+        return create_docker_jobspec(
+            self.name, 'tools/dockerfile/grpc_artifact_linux_x64',
+            'tools/run_tests/artifacts/build_package_php.sh')
 
 
 def targets():
-  """Gets list of supported targets"""
-  return [CSharpPackage(),
-          CSharpPackage(linux=True),
-          RubyPackage(),
-          PythonPackage(),
-          PHPPackage()]
+    """Gets list of supported targets"""
+    return [
+        CSharpPackage(), CSharpPackage(linux=True), RubyPackage(),
+        PythonPackage(), PHPPackage()
+    ]
diff --git a/tools/run_tests/generated/sources_and_headers.json b/tools/run_tests/generated/sources_and_headers.json
index e934df3a18..0fc5a25afd 100644
--- a/tools/run_tests/generated/sources_and_headers.json
+++ b/tools/run_tests/generated/sources_and_headers.json
@@ -573,45 +573,6 @@
   {
     "deps": [
       "gpr", 
-      "grpc"
-    ], 
-    "headers": [], 
-    "is_filegroup": false, 
-    "language": "c", 
-    "name": "gen_hpack_tables", 
-    "src": [
-      "tools/codegen/core/gen_hpack_tables.c"
-    ], 
-    "third_party": false, 
-    "type": "target"
-  }, 
-  {
-    "deps": [], 
-    "headers": [], 
-    "is_filegroup": false, 
-    "language": "c", 
-    "name": "gen_legal_metadata_characters", 
-    "src": [
-      "tools/codegen/core/gen_legal_metadata_characters.c"
-    ], 
-    "third_party": false, 
-    "type": "target"
-  }, 
-  {
-    "deps": [], 
-    "headers": [], 
-    "is_filegroup": false, 
-    "language": "c", 
-    "name": "gen_percent_encoding_tables", 
-    "src": [
-      "tools/codegen/core/gen_percent_encoding_tables.c"
-    ], 
-    "third_party": false, 
-    "type": "target"
-  }, 
-  {
-    "deps": [
-      "gpr", 
       "gpr_test_util", 
       "grpc", 
       "grpc_test_util"
@@ -4337,6 +4298,45 @@
   }, 
   {
     "deps": [
+      "gpr", 
+      "grpc"
+    ], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "cc", 
+    "name": "gen_hpack_tables", 
+    "src": [
+      "tools/codegen/core/gen_hpack_tables.cc"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "cc", 
+    "name": "gen_legal_metadata_characters", 
+    "src": [
+      "tools/codegen/core/gen_legal_metadata_characters.cc"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "cc", 
+    "name": "gen_percent_encoding_tables", 
+    "src": [
+      "tools/codegen/core/gen_percent_encoding_tables.cc"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
       "boringssl", 
       "boringssl_aes_test_lib", 
       "boringssl_test_util"
diff --git a/tools/run_tests/performance/OWNERS b/tools/run_tests/performance/OWNERS
new file mode 100644
index 0000000000..98c81529f3
--- /dev/null
+++ b/tools/run_tests/performance/OWNERS
@@ -0,0 +1,9 @@
+set noparent
+
+# These owners are in place to ensure that scenario_result_schema.json is not
+# modified without also running tools/run_tests/performance/patch_scenario_results_schema.py
+# to update the BigQuery schema
+
+@ncteisen
+@matt-kwong
+@ctiller
diff --git a/tools/run_tests/performance/bq_upload_result.py b/tools/run_tests/performance/bq_upload_result.py
index 31819d6159..6702587557 100755
--- a/tools/run_tests/performance/bq_upload_result.py
+++ b/tools/run_tests/performance/bq_upload_result.py
@@ -26,146 +26,161 @@ import time
 import uuid
 import massage_qps_stats
 
-
-gcp_utils_dir = os.path.abspath(os.path.join(
-    os.path.dirname(__file__), '../../gcp/utils'))
+gcp_utils_dir = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), '../../gcp/utils'))
 sys.path.append(gcp_utils_dir)
 import big_query_utils
 
-
-_PROJECT_ID='grpc-testing'
+_PROJECT_ID = 'grpc-testing'
 
 
 def _upload_netperf_latency_csv_to_bigquery(dataset_id, table_id, result_file):
-  with open(result_file, 'r') as f:
-    (col1, col2, col3) = f.read().split(',')
-    latency50 = float(col1.strip()) * 1000
-    latency90 = float(col2.strip()) * 1000
-    latency99 = float(col3.strip()) * 1000
-
-    scenario_result = {
-        'scenario': {
-          'name': 'netperf_tcp_rr'
-        },
-        'summary': {
-          'latency50': latency50,
-          'latency90': latency90,
-          'latency99': latency99
+    with open(result_file, 'r') as f:
+        (col1, col2, col3) = f.read().split(',')
+        latency50 = float(col1.strip()) * 1000
+        latency90 = float(col2.strip()) * 1000
+        latency99 = float(col3.strip()) * 1000
+
+        scenario_result = {
+            'scenario': {
+                'name': 'netperf_tcp_rr'
+            },
+            'summary': {
+                'latency50': latency50,
+                'latency90': latency90,
+                'latency99': latency99
+            }
         }
-    }
 
-  bq = big_query_utils.create_big_query()
-  _create_results_table(bq, dataset_id, table_id)
+    bq = big_query_utils.create_big_query()
+    _create_results_table(bq, dataset_id, table_id)
 
-  if not _insert_result(bq, dataset_id, table_id, scenario_result, flatten=False):
-    print('Error uploading result to bigquery.')
-    sys.exit(1)
+    if not _insert_result(
+            bq, dataset_id, table_id, scenario_result, flatten=False):
+        print('Error uploading result to bigquery.')
+        sys.exit(1)
 
 
 def _upload_scenario_result_to_bigquery(dataset_id, table_id, result_file):
-  with open(result_file, 'r') as f:
-    scenario_result = json.loads(f.read())
+    with open(result_file, 'r') as f:
+        scenario_result = json.loads(f.read())
 
-  bq = big_query_utils.create_big_query()
-  _create_results_table(bq, dataset_id, table_id)
+    bq = big_query_utils.create_big_query()
+    _create_results_table(bq, dataset_id, table_id)
 
-  if not _insert_result(bq, dataset_id, table_id, scenario_result):
-    print('Error uploading result to bigquery.')
-    sys.exit(1)
+    if not _insert_result(bq, dataset_id, table_id, scenario_result):
+        print('Error uploading result to bigquery.')
+        sys.exit(1)
 
 
 def _insert_result(bq, dataset_id, table_id, scenario_result, flatten=True):
-  if flatten:
-    _flatten_result_inplace(scenario_result)
-  _populate_metadata_inplace(scenario_result)
-  row = big_query_utils.make_row(str(uuid.uuid4()), scenario_result)
-  return big_query_utils.insert_rows(bq,
-                                     _PROJECT_ID,
-                                     dataset_id,
-                                     table_id,
-                                     [row])
+    if flatten:
+        _flatten_result_inplace(scenario_result)
+    _populate_metadata_inplace(scenario_result)
+    row = big_query_utils.make_row(str(uuid.uuid4()), scenario_result)
+    return big_query_utils.insert_rows(bq, _PROJECT_ID, dataset_id, table_id,
+                                       [row])
 
 
 def _create_results_table(bq, dataset_id, table_id):
-  with open(os.path.dirname(__file__) + '/scenario_result_schema.json', 'r') as f:
-    table_schema = json.loads(f.read())
-  desc = 'Results of performance benchmarks.'
-  return big_query_utils.create_table2(bq, _PROJECT_ID, dataset_id,
-                               table_id, table_schema, desc)
+    with open(os.path.dirname(__file__) + '/scenario_result_schema.json',
+              'r') as f:
+        table_schema = json.loads(f.read())
+    desc = 'Results of performance benchmarks.'
+    return big_query_utils.create_table2(bq, _PROJECT_ID, dataset_id, table_id,
+                                         table_schema, desc)
 
 
 def _flatten_result_inplace(scenario_result):
-  """Bigquery is not really great for handling deeply nested data
+    """Bigquery is not really great for handling deeply nested data
   and repeated fields. To maintain values of some fields while keeping
   the schema relatively simple, we artificially leave some of the fields
   as JSON strings.
   """
-  scenario_result['scenario']['clientConfig'] = json.dumps(scenario_result['scenario']['clientConfig'])
-  scenario_result['scenario']['serverConfig'] = json.dumps(scenario_result['scenario']['serverConfig'])
-  scenario_result['latencies'] = json.dumps(scenario_result['latencies'])
-  scenario_result['serverCpuStats'] = []
-  for stats in scenario_result['serverStats']:
-    scenario_result['serverCpuStats'].append(dict())
-    scenario_result['serverCpuStats'][-1]['totalCpuTime'] = stats.pop('totalCpuTime', None)
-    scenario_result['serverCpuStats'][-1]['idleCpuTime'] = stats.pop('idleCpuTime', None)
-  for stats in scenario_result['clientStats']:
-    stats['latencies'] = json.dumps(stats['latencies'])
-    stats.pop('requestResults', None)
-  scenario_result['serverCores'] = json.dumps(scenario_result['serverCores'])
-  scenario_result['clientSuccess'] = json.dumps(scenario_result['clientSuccess'])
-  scenario_result['serverSuccess'] = json.dumps(scenario_result['serverSuccess'])
-  scenario_result['requestResults'] = json.dumps(scenario_result.get('requestResults', []))
-  scenario_result['serverCpuUsage'] = scenario_result['summary'].pop('serverCpuUsage', None)
-  scenario_result['summary'].pop('successfulRequestsPerSecond', None)
-  scenario_result['summary'].pop('failedRequestsPerSecond', None)
-  massage_qps_stats.massage_qps_stats(scenario_result)
+    scenario_result['scenario']['clientConfig'] = json.dumps(
+        scenario_result['scenario']['clientConfig'])
+    scenario_result['scenario']['serverConfig'] = json.dumps(
+        scenario_result['scenario']['serverConfig'])
+    scenario_result['latencies'] = json.dumps(scenario_result['latencies'])
+    scenario_result['serverCpuStats'] = []
+    for stats in scenario_result['serverStats']:
+        scenario_result['serverCpuStats'].append(dict())
+        scenario_result['serverCpuStats'][-1]['totalCpuTime'] = stats.pop(
+            'totalCpuTime', None)
+        scenario_result['serverCpuStats'][-1]['idleCpuTime'] = stats.pop(
+            'idleCpuTime', None)
+    for stats in scenario_result['clientStats']:
+        stats['latencies'] = json.dumps(stats['latencies'])
+        stats.pop('requestResults', None)
+    scenario_result['serverCores'] = json.dumps(scenario_result['serverCores'])
+    scenario_result['clientSuccess'] = json.dumps(
+        scenario_result['clientSuccess'])
+    scenario_result['serverSuccess'] = json.dumps(
+        scenario_result['serverSuccess'])
+    scenario_result['requestResults'] = json.dumps(
+        scenario_result.get('requestResults', []))
+    scenario_result['serverCpuUsage'] = scenario_result['summary'].pop(
+        'serverCpuUsage', None)
+    scenario_result['summary'].pop('successfulRequestsPerSecond', None)
+    scenario_result['summary'].pop('failedRequestsPerSecond', None)
+    massage_qps_stats.massage_qps_stats(scenario_result)
 
 
 def _populate_metadata_inplace(scenario_result):
-  """Populates metadata based on environment variables set by Jenkins."""
-  # NOTE: Grabbing the Jenkins environment variables will only work if the
-  # driver is running locally on the same machine where Jenkins has started
-  # the job. For our setup, this is currently the case, so just assume that.
-  build_number = os.getenv('BUILD_NUMBER')
-  build_url = os.getenv('BUILD_URL')
-  job_name = os.getenv('JOB_NAME')
-  git_commit = os.getenv('GIT_COMMIT')
-  # actual commit is the actual head of PR that is getting tested
-  git_actual_commit = os.getenv('ghprbActualCommit')
-
-  utc_timestamp = str(calendar.timegm(time.gmtime()))
-  metadata = {'created': utc_timestamp}
-
-  if build_number:
-    metadata['buildNumber'] = build_number
-  if build_url:
-    metadata['buildUrl'] = build_url
-  if job_name:
-    metadata['jobName'] = job_name
-  if git_commit:
-    metadata['gitCommit'] = git_commit
-  if git_actual_commit:
-    metadata['gitActualCommit'] = git_actual_commit
-
-  scenario_result['metadata'] = metadata
+    """Populates metadata based on environment variables set by Jenkins."""
+    # NOTE: Grabbing the Jenkins environment variables will only work if the
+    # driver is running locally on the same machine where Jenkins has started
+    # the job. For our setup, this is currently the case, so just assume that.
+    build_number = os.getenv('BUILD_NUMBER')
+    build_url = os.getenv('BUILD_URL')
+    job_name = os.getenv('JOB_NAME')
+    git_commit = os.getenv('GIT_COMMIT')
+    # actual commit is the actual head of PR that is getting tested
+    git_actual_commit = os.getenv('ghprbActualCommit')
+
+    utc_timestamp = str(calendar.timegm(time.gmtime()))
+    metadata = {'created': utc_timestamp}
+
+    if build_number:
+        metadata['buildNumber'] = build_number
+    if build_url:
+        metadata['buildUrl'] = build_url
+    if job_name:
+        metadata['jobName'] = job_name
+    if git_commit:
+        metadata['gitCommit'] = git_commit
+    if git_actual_commit:
+        metadata['gitActualCommit'] = git_actual_commit
+
+    scenario_result['metadata'] = metadata
 
 
 argp = argparse.ArgumentParser(description='Upload result to big query.')
-argp.add_argument('--bq_result_table', required=True, default=None, type=str,
-                  help='Bigquery "dataset.table" to upload results to.')
-argp.add_argument('--file_to_upload', default='scenario_result.json', type=str,
-                  help='Report file to upload.')
-argp.add_argument('--file_format',
-                  choices=['scenario_result','netperf_latency_csv'],
-                  default='scenario_result',
-                  help='Format of the file to upload.')
+argp.add_argument(
+    '--bq_result_table',
+    required=True,
+    default=None,
+    type=str,
+    help='Bigquery "dataset.table" to upload results to.')
+argp.add_argument(
+    '--file_to_upload',
+    default='scenario_result.json',
+    type=str,
+    help='Report file to upload.')
+argp.add_argument(
+    '--file_format',
+    choices=['scenario_result', 'netperf_latency_csv'],
+    default='scenario_result',
+    help='Format of the file to upload.')
 
 args = argp.parse_args()
 
 dataset_id, table_id = args.bq_result_table.split('.', 2)
 
 if args.file_format == 'netperf_latency_csv':
-  _upload_netperf_latency_csv_to_bigquery(dataset_id, table_id, args.file_to_upload)
+    _upload_netperf_latency_csv_to_bigquery(dataset_id, table_id,
+                                            args.file_to_upload)
 else:
-  _upload_scenario_result_to_bigquery(dataset_id, table_id, args.file_to_upload)
+    _upload_scenario_result_to_bigquery(dataset_id, table_id,
+                                        args.file_to_upload)
 print('Successfully uploaded %s to BigQuery.\n' % args.file_to_upload)
diff --git a/tools/run_tests/performance/massage_qps_stats.py b/tools/run_tests/performance/massage_qps_stats.py
index 48c57581a5..37f6e7aae0 100644
--- a/tools/run_tests/performance/massage_qps_stats.py
+++ b/tools/run_tests/performance/massage_qps_stats.py
@@ -15,182 +15,456 @@
 # Autogenerated by tools/codegen/core/gen_stats_data.py
 
 import massage_qps_stats_helpers
+
+
 def massage_qps_stats(scenario_result):
-  for stats in scenario_result["serverStats"] + scenario_result["clientStats"]:
-    if "coreStats" not in stats: return
-    core_stats = stats["coreStats"]
-    del stats["coreStats"]
-    stats["core_client_calls_created"] = massage_qps_stats_helpers.counter(core_stats, "client_calls_created")
-    stats["core_server_calls_created"] = massage_qps_stats_helpers.counter(core_stats, "server_calls_created")
-    stats["core_cqs_created"] = massage_qps_stats_helpers.counter(core_stats, "cqs_created")
-    stats["core_client_channels_created"] = massage_qps_stats_helpers.counter(core_stats, "client_channels_created")
-    stats["core_client_subchannels_created"] = massage_qps_stats_helpers.counter(core_stats, "client_subchannels_created")
-    stats["core_server_channels_created"] = massage_qps_stats_helpers.counter(core_stats, "server_channels_created")
-    stats["core_syscall_poll"] = massage_qps_stats_helpers.counter(core_stats, "syscall_poll")
-    stats["core_syscall_wait"] = massage_qps_stats_helpers.counter(core_stats, "syscall_wait")
-    stats["core_pollset_kick"] = massage_qps_stats_helpers.counter(core_stats, "pollset_kick")
-    stats["core_pollset_kicked_without_poller"] = massage_qps_stats_helpers.counter(core_stats, "pollset_kicked_without_poller")
-    stats["core_pollset_kicked_again"] = massage_qps_stats_helpers.counter(core_stats, "pollset_kicked_again")
-    stats["core_pollset_kick_wakeup_fd"] = massage_qps_stats_helpers.counter(core_stats, "pollset_kick_wakeup_fd")
-    stats["core_pollset_kick_wakeup_cv"] = massage_qps_stats_helpers.counter(core_stats, "pollset_kick_wakeup_cv")
-    stats["core_pollset_kick_own_thread"] = massage_qps_stats_helpers.counter(core_stats, "pollset_kick_own_thread")
-    stats["core_histogram_slow_lookups"] = massage_qps_stats_helpers.counter(core_stats, "histogram_slow_lookups")
-    stats["core_syscall_write"] = massage_qps_stats_helpers.counter(core_stats, "syscall_write")
-    stats["core_syscall_read"] = massage_qps_stats_helpers.counter(core_stats, "syscall_read")
-    stats["core_tcp_backup_pollers_created"] = massage_qps_stats_helpers.counter(core_stats, "tcp_backup_pollers_created")
-    stats["core_tcp_backup_poller_polls"] = massage_qps_stats_helpers.counter(core_stats, "tcp_backup_poller_polls")
-    stats["core_http2_op_batches"] = massage_qps_stats_helpers.counter(core_stats, "http2_op_batches")
-    stats["core_http2_op_cancel"] = massage_qps_stats_helpers.counter(core_stats, "http2_op_cancel")
-    stats["core_http2_op_send_initial_metadata"] = massage_qps_stats_helpers.counter(core_stats, "http2_op_send_initial_metadata")
-    stats["core_http2_op_send_message"] = massage_qps_stats_helpers.counter(core_stats, "http2_op_send_message")
-    stats["core_http2_op_send_trailing_metadata"] = massage_qps_stats_helpers.counter(core_stats, "http2_op_send_trailing_metadata")
-    stats["core_http2_op_recv_initial_metadata"] = massage_qps_stats_helpers.counter(core_stats, "http2_op_recv_initial_metadata")
-    stats["core_http2_op_recv_message"] = massage_qps_stats_helpers.counter(core_stats, "http2_op_recv_message")
-    stats["core_http2_op_recv_trailing_metadata"] = massage_qps_stats_helpers.counter(core_stats, "http2_op_recv_trailing_metadata")
-    stats["core_http2_settings_writes"] = massage_qps_stats_helpers.counter(core_stats, "http2_settings_writes")
-    stats["core_http2_pings_sent"] = massage_qps_stats_helpers.counter(core_stats, "http2_pings_sent")
-    stats["core_http2_writes_begun"] = massage_qps_stats_helpers.counter(core_stats, "http2_writes_begun")
-    stats["core_http2_writes_offloaded"] = massage_qps_stats_helpers.counter(core_stats, "http2_writes_offloaded")
-    stats["core_http2_writes_continued"] = massage_qps_stats_helpers.counter(core_stats, "http2_writes_continued")
-    stats["core_http2_partial_writes"] = massage_qps_stats_helpers.counter(core_stats, "http2_partial_writes")
-    stats["core_http2_initiate_write_due_to_initial_write"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_initial_write")
-    stats["core_http2_initiate_write_due_to_start_new_stream"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_start_new_stream")
-    stats["core_http2_initiate_write_due_to_send_message"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_send_message")
-    stats["core_http2_initiate_write_due_to_send_initial_metadata"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_send_initial_metadata")
-    stats["core_http2_initiate_write_due_to_send_trailing_metadata"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_send_trailing_metadata")
-    stats["core_http2_initiate_write_due_to_retry_send_ping"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_retry_send_ping")
-    stats["core_http2_initiate_write_due_to_continue_pings"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_continue_pings")
-    stats["core_http2_initiate_write_due_to_goaway_sent"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_goaway_sent")
-    stats["core_http2_initiate_write_due_to_rst_stream"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_rst_stream")
-    stats["core_http2_initiate_write_due_to_close_from_api"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_close_from_api")
-    stats["core_http2_initiate_write_due_to_stream_flow_control"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_stream_flow_control")
-    stats["core_http2_initiate_write_due_to_transport_flow_control"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_transport_flow_control")
-    stats["core_http2_initiate_write_due_to_send_settings"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_send_settings")
-    stats["core_http2_initiate_write_due_to_bdp_estimator_ping"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_bdp_estimator_ping")
-    stats["core_http2_initiate_write_due_to_flow_control_unstalled_by_setting"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_flow_control_unstalled_by_setting")
-    stats["core_http2_initiate_write_due_to_flow_control_unstalled_by_update"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_flow_control_unstalled_by_update")
-    stats["core_http2_initiate_write_due_to_application_ping"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_application_ping")
-    stats["core_http2_initiate_write_due_to_keepalive_ping"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_keepalive_ping")
-    stats["core_http2_initiate_write_due_to_transport_flow_control_unstalled"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_transport_flow_control_unstalled")
-    stats["core_http2_initiate_write_due_to_ping_response"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_ping_response")
-    stats["core_http2_initiate_write_due_to_force_rst_stream"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_force_rst_stream")
-    stats["core_http2_spurious_writes_begun"] = massage_qps_stats_helpers.counter(core_stats, "http2_spurious_writes_begun")
-    stats["core_hpack_recv_indexed"] = massage_qps_stats_helpers.counter(core_stats, "hpack_recv_indexed")
-    stats["core_hpack_recv_lithdr_incidx"] = massage_qps_stats_helpers.counter(core_stats, "hpack_recv_lithdr_incidx")
-    stats["core_hpack_recv_lithdr_incidx_v"] = massage_qps_stats_helpers.counter(core_stats, "hpack_recv_lithdr_incidx_v")
-    stats["core_hpack_recv_lithdr_notidx"] = massage_qps_stats_helpers.counter(core_stats, "hpack_recv_lithdr_notidx")
-    stats["core_hpack_recv_lithdr_notidx_v"] = massage_qps_stats_helpers.counter(core_stats, "hpack_recv_lithdr_notidx_v")
-    stats["core_hpack_recv_lithdr_nvridx"] = massage_qps_stats_helpers.counter(core_stats, "hpack_recv_lithdr_nvridx")
-    stats["core_hpack_recv_lithdr_nvridx_v"] = massage_qps_stats_helpers.counter(core_stats, "hpack_recv_lithdr_nvridx_v")
-    stats["core_hpack_recv_uncompressed"] = massage_qps_stats_helpers.counter(core_stats, "hpack_recv_uncompressed")
-    stats["core_hpack_recv_huffman"] = massage_qps_stats_helpers.counter(core_stats, "hpack_recv_huffman")
-    stats["core_hpack_recv_binary"] = massage_qps_stats_helpers.counter(core_stats, "hpack_recv_binary")
-    stats["core_hpack_recv_binary_base64"] = massage_qps_stats_helpers.counter(core_stats, "hpack_recv_binary_base64")
-    stats["core_hpack_send_indexed"] = massage_qps_stats_helpers.counter(core_stats, "hpack_send_indexed")
-    stats["core_hpack_send_lithdr_incidx"] = massage_qps_stats_helpers.counter(core_stats, "hpack_send_lithdr_incidx")
-    stats["core_hpack_send_lithdr_incidx_v"] = massage_qps_stats_helpers.counter(core_stats, "hpack_send_lithdr_incidx_v")
-    stats["core_hpack_send_lithdr_notidx"] = massage_qps_stats_helpers.counter(core_stats, "hpack_send_lithdr_notidx")
-    stats["core_hpack_send_lithdr_notidx_v"] = massage_qps_stats_helpers.counter(core_stats, "hpack_send_lithdr_notidx_v")
-    stats["core_hpack_send_lithdr_nvridx"] = massage_qps_stats_helpers.counter(core_stats, "hpack_send_lithdr_nvridx")
-    stats["core_hpack_send_lithdr_nvridx_v"] = massage_qps_stats_helpers.counter(core_stats, "hpack_send_lithdr_nvridx_v")
-    stats["core_hpack_send_uncompressed"] = massage_qps_stats_helpers.counter(core_stats, "hpack_send_uncompressed")
-    stats["core_hpack_send_huffman"] = massage_qps_stats_helpers.counter(core_stats, "hpack_send_huffman")
-    stats["core_hpack_send_binary"] = massage_qps_stats_helpers.counter(core_stats, "hpack_send_binary")
-    stats["core_hpack_send_binary_base64"] = massage_qps_stats_helpers.counter(core_stats, "hpack_send_binary_base64")
-    stats["core_combiner_locks_initiated"] = massage_qps_stats_helpers.counter(core_stats, "combiner_locks_initiated")
-    stats["core_combiner_locks_scheduled_items"] = massage_qps_stats_helpers.counter(core_stats, "combiner_locks_scheduled_items")
-    stats["core_combiner_locks_scheduled_final_items"] = massage_qps_stats_helpers.counter(core_stats, "combiner_locks_scheduled_final_items")
-    stats["core_combiner_locks_offloaded"] = massage_qps_stats_helpers.counter(core_stats, "combiner_locks_offloaded")
-    stats["core_call_combiner_locks_initiated"] = massage_qps_stats_helpers.counter(core_stats, "call_combiner_locks_initiated")
-    stats["core_call_combiner_locks_scheduled_items"] = massage_qps_stats_helpers.counter(core_stats, "call_combiner_locks_scheduled_items")
-    stats["core_call_combiner_set_notify_on_cancel"] = massage_qps_stats_helpers.counter(core_stats, "call_combiner_set_notify_on_cancel")
-    stats["core_call_combiner_cancelled"] = massage_qps_stats_helpers.counter(core_stats, "call_combiner_cancelled")
-    stats["core_executor_scheduled_short_items"] = massage_qps_stats_helpers.counter(core_stats, "executor_scheduled_short_items")
-    stats["core_executor_scheduled_long_items"] = massage_qps_stats_helpers.counter(core_stats, "executor_scheduled_long_items")
-    stats["core_executor_scheduled_to_self"] = massage_qps_stats_helpers.counter(core_stats, "executor_scheduled_to_self")
-    stats["core_executor_wakeup_initiated"] = massage_qps_stats_helpers.counter(core_stats, "executor_wakeup_initiated")
-    stats["core_executor_queue_drained"] = massage_qps_stats_helpers.counter(core_stats, "executor_queue_drained")
-    stats["core_executor_push_retries"] = massage_qps_stats_helpers.counter(core_stats, "executor_push_retries")
-    stats["core_server_requested_calls"] = massage_qps_stats_helpers.counter(core_stats, "server_requested_calls")
-    stats["core_server_slowpath_requests_queued"] = massage_qps_stats_helpers.counter(core_stats, "server_slowpath_requests_queued")
-    stats["core_cq_ev_queue_trylock_failures"] = massage_qps_stats_helpers.counter(core_stats, "cq_ev_queue_trylock_failures")
-    stats["core_cq_ev_queue_trylock_successes"] = massage_qps_stats_helpers.counter(core_stats, "cq_ev_queue_trylock_successes")
-    stats["core_cq_ev_queue_transient_pop_failures"] = massage_qps_stats_helpers.counter(core_stats, "cq_ev_queue_transient_pop_failures")
-    h = massage_qps_stats_helpers.histogram(core_stats, "call_initial_size")
-    stats["core_call_initial_size"] = ",".join("%f" % x for x in h.buckets)
-    stats["core_call_initial_size_bkts"] = ",".join("%f" % x for x in h.boundaries)
-    stats["core_call_initial_size_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
-    stats["core_call_initial_size_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
-    stats["core_call_initial_size_99p"] = massage_qps_stats_helpers.percentile(h.buckets, 99, h.boundaries)
-    h = massage_qps_stats_helpers.histogram(core_stats, "poll_events_returned")
-    stats["core_poll_events_returned"] = ",".join("%f" % x for x in h.buckets)
-    stats["core_poll_events_returned_bkts"] = ",".join("%f" % x for x in h.boundaries)
-    stats["core_poll_events_returned_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
-    stats["core_poll_events_returned_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
-    stats["core_poll_events_returned_99p"] = massage_qps_stats_helpers.percentile(h.buckets, 99, h.boundaries)
-    h = massage_qps_stats_helpers.histogram(core_stats, "tcp_write_size")
-    stats["core_tcp_write_size"] = ",".join("%f" % x for x in h.buckets)
-    stats["core_tcp_write_size_bkts"] = ",".join("%f" % x for x in h.boundaries)
-    stats["core_tcp_write_size_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
-    stats["core_tcp_write_size_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
-    stats["core_tcp_write_size_99p"] = massage_qps_stats_helpers.percentile(h.buckets, 99, h.boundaries)
-    h = massage_qps_stats_helpers.histogram(core_stats, "tcp_write_iov_size")
-    stats["core_tcp_write_iov_size"] = ",".join("%f" % x for x in h.buckets)
-    stats["core_tcp_write_iov_size_bkts"] = ",".join("%f" % x for x in h.boundaries)
-    stats["core_tcp_write_iov_size_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
-    stats["core_tcp_write_iov_size_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
-    stats["core_tcp_write_iov_size_99p"] = massage_qps_stats_helpers.percentile(h.buckets, 99, h.boundaries)
-    h = massage_qps_stats_helpers.histogram(core_stats, "tcp_read_size")
-    stats["core_tcp_read_size"] = ",".join("%f" % x for x in h.buckets)
-    stats["core_tcp_read_size_bkts"] = ",".join("%f" % x for x in h.boundaries)
-    stats["core_tcp_read_size_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
-    stats["core_tcp_read_size_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
-    stats["core_tcp_read_size_99p"] = massage_qps_stats_helpers.percentile(h.buckets, 99, h.boundaries)
-    h = massage_qps_stats_helpers.histogram(core_stats, "tcp_read_offer")
-    stats["core_tcp_read_offer"] = ",".join("%f" % x for x in h.buckets)
-    stats["core_tcp_read_offer_bkts"] = ",".join("%f" % x for x in h.boundaries)
-    stats["core_tcp_read_offer_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
-    stats["core_tcp_read_offer_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
-    stats["core_tcp_read_offer_99p"] = massage_qps_stats_helpers.percentile(h.buckets, 99, h.boundaries)
-    h = massage_qps_stats_helpers.histogram(core_stats, "tcp_read_offer_iov_size")
-    stats["core_tcp_read_offer_iov_size"] = ",".join("%f" % x for x in h.buckets)
-    stats["core_tcp_read_offer_iov_size_bkts"] = ",".join("%f" % x for x in h.boundaries)
-    stats["core_tcp_read_offer_iov_size_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
-    stats["core_tcp_read_offer_iov_size_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
-    stats["core_tcp_read_offer_iov_size_99p"] = massage_qps_stats_helpers.percentile(h.buckets, 99, h.boundaries)
-    h = massage_qps_stats_helpers.histogram(core_stats, "http2_send_message_size")
-    stats["core_http2_send_message_size"] = ",".join("%f" % x for x in h.buckets)
-    stats["core_http2_send_message_size_bkts"] = ",".join("%f" % x for x in h.boundaries)
-    stats["core_http2_send_message_size_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
-    stats["core_http2_send_message_size_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
-    stats["core_http2_send_message_size_99p"] = massage_qps_stats_helpers.percentile(h.buckets, 99, h.boundaries)
-    h = massage_qps_stats_helpers.histogram(core_stats, "http2_send_initial_metadata_per_write")
-    stats["core_http2_send_initial_metadata_per_write"] = ",".join("%f" % x for x in h.buckets)
-    stats["core_http2_send_initial_metadata_per_write_bkts"] = ",".join("%f" % x for x in h.boundaries)
-    stats["core_http2_send_initial_metadata_per_write_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
-    stats["core_http2_send_initial_metadata_per_write_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
-    stats["core_http2_send_initial_metadata_per_write_99p"] = massage_qps_stats_helpers.percentile(h.buckets, 99, h.boundaries)
-    h = massage_qps_stats_helpers.histogram(core_stats, "http2_send_message_per_write")
-    stats["core_http2_send_message_per_write"] = ",".join("%f" % x for x in h.buckets)
-    stats["core_http2_send_message_per_write_bkts"] = ",".join("%f" % x for x in h.boundaries)
-    stats["core_http2_send_message_per_write_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
-    stats["core_http2_send_message_per_write_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
-    stats["core_http2_send_message_per_write_99p"] = massage_qps_stats_helpers.percentile(h.buckets, 99, h.boundaries)
-    h = massage_qps_stats_helpers.histogram(core_stats, "http2_send_trailing_metadata_per_write")
-    stats["core_http2_send_trailing_metadata_per_write"] = ",".join("%f" % x for x in h.buckets)
-    stats["core_http2_send_trailing_metadata_per_write_bkts"] = ",".join("%f" % x for x in h.boundaries)
-    stats["core_http2_send_trailing_metadata_per_write_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
-    stats["core_http2_send_trailing_metadata_per_write_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
-    stats["core_http2_send_trailing_metadata_per_write_99p"] = massage_qps_stats_helpers.percentile(h.buckets, 99, h.boundaries)
-    h = massage_qps_stats_helpers.histogram(core_stats, "http2_send_flowctl_per_write")
-    stats["core_http2_send_flowctl_per_write"] = ",".join("%f" % x for x in h.buckets)
-    stats["core_http2_send_flowctl_per_write_bkts"] = ",".join("%f" % x for x in h.boundaries)
-    stats["core_http2_send_flowctl_per_write_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
-    stats["core_http2_send_flowctl_per_write_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
-    stats["core_http2_send_flowctl_per_write_99p"] = massage_qps_stats_helpers.percentile(h.buckets, 99, h.boundaries)
-    h = massage_qps_stats_helpers.histogram(core_stats, "server_cqs_checked")
-    stats["core_server_cqs_checked"] = ",".join("%f" % x for x in h.buckets)
-    stats["core_server_cqs_checked_bkts"] = ",".join("%f" % x for x in h.boundaries)
-    stats["core_server_cqs_checked_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
-    stats["core_server_cqs_checked_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
-    stats["core_server_cqs_checked_99p"] = massage_qps_stats_helpers.percentile(h.buckets, 99, h.boundaries)
+    for stats in scenario_result["serverStats"] + scenario_result[
+            "clientStats"]:
+        if "coreStats" not in stats: return
+        core_stats = stats["coreStats"]
+        del stats["coreStats"]
+        stats["core_client_calls_created"] = massage_qps_stats_helpers.counter(
+            core_stats, "client_calls_created")
+        stats["core_server_calls_created"] = massage_qps_stats_helpers.counter(
+            core_stats, "server_calls_created")
+        stats["core_cqs_created"] = massage_qps_stats_helpers.counter(
+            core_stats, "cqs_created")
+        stats[
+            "core_client_channels_created"] = massage_qps_stats_helpers.counter(
+                core_stats, "client_channels_created")
+        stats[
+            "core_client_subchannels_created"] = massage_qps_stats_helpers.counter(
+                core_stats, "client_subchannels_created")
+        stats[
+            "core_server_channels_created"] = massage_qps_stats_helpers.counter(
+                core_stats, "server_channels_created")
+        stats["core_syscall_poll"] = massage_qps_stats_helpers.counter(
+            core_stats, "syscall_poll")
+        stats["core_syscall_wait"] = massage_qps_stats_helpers.counter(
+            core_stats, "syscall_wait")
+        stats["core_pollset_kick"] = massage_qps_stats_helpers.counter(
+            core_stats, "pollset_kick")
+        stats[
+            "core_pollset_kicked_without_poller"] = massage_qps_stats_helpers.counter(
+                core_stats, "pollset_kicked_without_poller")
+        stats["core_pollset_kicked_again"] = massage_qps_stats_helpers.counter(
+            core_stats, "pollset_kicked_again")
+        stats[
+            "core_pollset_kick_wakeup_fd"] = massage_qps_stats_helpers.counter(
+                core_stats, "pollset_kick_wakeup_fd")
+        stats[
+            "core_pollset_kick_wakeup_cv"] = massage_qps_stats_helpers.counter(
+                core_stats, "pollset_kick_wakeup_cv")
+        stats[
+            "core_pollset_kick_own_thread"] = massage_qps_stats_helpers.counter(
+                core_stats, "pollset_kick_own_thread")
+        stats[
+            "core_histogram_slow_lookups"] = massage_qps_stats_helpers.counter(
+                core_stats, "histogram_slow_lookups")
+        stats["core_syscall_write"] = massage_qps_stats_helpers.counter(
+            core_stats, "syscall_write")
+        stats["core_syscall_read"] = massage_qps_stats_helpers.counter(
+            core_stats, "syscall_read")
+        stats[
+            "core_tcp_backup_pollers_created"] = massage_qps_stats_helpers.counter(
+                core_stats, "tcp_backup_pollers_created")
+        stats[
+            "core_tcp_backup_poller_polls"] = massage_qps_stats_helpers.counter(
+                core_stats, "tcp_backup_poller_polls")
+        stats["core_http2_op_batches"] = massage_qps_stats_helpers.counter(
+            core_stats, "http2_op_batches")
+        stats["core_http2_op_cancel"] = massage_qps_stats_helpers.counter(
+            core_stats, "http2_op_cancel")
+        stats[
+            "core_http2_op_send_initial_metadata"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_op_send_initial_metadata")
+        stats["core_http2_op_send_message"] = massage_qps_stats_helpers.counter(
+            core_stats, "http2_op_send_message")
+        stats[
+            "core_http2_op_send_trailing_metadata"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_op_send_trailing_metadata")
+        stats[
+            "core_http2_op_recv_initial_metadata"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_op_recv_initial_metadata")
+        stats["core_http2_op_recv_message"] = massage_qps_stats_helpers.counter(
+            core_stats, "http2_op_recv_message")
+        stats[
+            "core_http2_op_recv_trailing_metadata"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_op_recv_trailing_metadata")
+        stats["core_http2_settings_writes"] = massage_qps_stats_helpers.counter(
+            core_stats, "http2_settings_writes")
+        stats["core_http2_pings_sent"] = massage_qps_stats_helpers.counter(
+            core_stats, "http2_pings_sent")
+        stats["core_http2_writes_begun"] = massage_qps_stats_helpers.counter(
+            core_stats, "http2_writes_begun")
+        stats[
+            "core_http2_writes_offloaded"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_writes_offloaded")
+        stats[
+            "core_http2_writes_continued"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_writes_continued")
+        stats["core_http2_partial_writes"] = massage_qps_stats_helpers.counter(
+            core_stats, "http2_partial_writes")
+        stats[
+            "core_http2_initiate_write_due_to_initial_write"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_initial_write")
+        stats[
+            "core_http2_initiate_write_due_to_start_new_stream"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_start_new_stream")
+        stats[
+            "core_http2_initiate_write_due_to_send_message"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_send_message")
+        stats[
+            "core_http2_initiate_write_due_to_send_initial_metadata"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_send_initial_metadata")
+        stats[
+            "core_http2_initiate_write_due_to_send_trailing_metadata"] = massage_qps_stats_helpers.counter(
+                core_stats,
+                "http2_initiate_write_due_to_send_trailing_metadata")
+        stats[
+            "core_http2_initiate_write_due_to_retry_send_ping"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_retry_send_ping")
+        stats[
+            "core_http2_initiate_write_due_to_continue_pings"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_continue_pings")
+        stats[
+            "core_http2_initiate_write_due_to_goaway_sent"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_goaway_sent")
+        stats[
+            "core_http2_initiate_write_due_to_rst_stream"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_rst_stream")
+        stats[
+            "core_http2_initiate_write_due_to_close_from_api"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_close_from_api")
+        stats[
+            "core_http2_initiate_write_due_to_stream_flow_control"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_stream_flow_control")
+        stats[
+            "core_http2_initiate_write_due_to_transport_flow_control"] = massage_qps_stats_helpers.counter(
+                core_stats,
+                "http2_initiate_write_due_to_transport_flow_control")
+        stats[
+            "core_http2_initiate_write_due_to_send_settings"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_send_settings")
+        stats[
+            "core_http2_initiate_write_due_to_bdp_estimator_ping"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_bdp_estimator_ping")
+        stats[
+            "core_http2_initiate_write_due_to_flow_control_unstalled_by_setting"] = massage_qps_stats_helpers.counter(
+                core_stats,
+                "http2_initiate_write_due_to_flow_control_unstalled_by_setting")
+        stats[
+            "core_http2_initiate_write_due_to_flow_control_unstalled_by_update"] = massage_qps_stats_helpers.counter(
+                core_stats,
+                "http2_initiate_write_due_to_flow_control_unstalled_by_update")
+        stats[
+            "core_http2_initiate_write_due_to_application_ping"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_application_ping")
+        stats[
+            "core_http2_initiate_write_due_to_keepalive_ping"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_keepalive_ping")
+        stats[
+            "core_http2_initiate_write_due_to_transport_flow_control_unstalled"] = massage_qps_stats_helpers.counter(
+                core_stats,
+                "http2_initiate_write_due_to_transport_flow_control_unstalled")
+        stats[
+            "core_http2_initiate_write_due_to_ping_response"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_ping_response")
+        stats[
+            "core_http2_initiate_write_due_to_force_rst_stream"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_initiate_write_due_to_force_rst_stream")
+        stats[
+            "core_http2_spurious_writes_begun"] = massage_qps_stats_helpers.counter(
+                core_stats, "http2_spurious_writes_begun")
+        stats["core_hpack_recv_indexed"] = massage_qps_stats_helpers.counter(
+            core_stats, "hpack_recv_indexed")
+        stats[
+            "core_hpack_recv_lithdr_incidx"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_recv_lithdr_incidx")
+        stats[
+            "core_hpack_recv_lithdr_incidx_v"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_recv_lithdr_incidx_v")
+        stats[
+            "core_hpack_recv_lithdr_notidx"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_recv_lithdr_notidx")
+        stats[
+            "core_hpack_recv_lithdr_notidx_v"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_recv_lithdr_notidx_v")
+        stats[
+            "core_hpack_recv_lithdr_nvridx"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_recv_lithdr_nvridx")
+        stats[
+            "core_hpack_recv_lithdr_nvridx_v"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_recv_lithdr_nvridx_v")
+        stats[
+            "core_hpack_recv_uncompressed"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_recv_uncompressed")
+        stats["core_hpack_recv_huffman"] = massage_qps_stats_helpers.counter(
+            core_stats, "hpack_recv_huffman")
+        stats["core_hpack_recv_binary"] = massage_qps_stats_helpers.counter(
+            core_stats, "hpack_recv_binary")
+        stats[
+            "core_hpack_recv_binary_base64"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_recv_binary_base64")
+        stats["core_hpack_send_indexed"] = massage_qps_stats_helpers.counter(
+            core_stats, "hpack_send_indexed")
+        stats[
+            "core_hpack_send_lithdr_incidx"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_send_lithdr_incidx")
+        stats[
+            "core_hpack_send_lithdr_incidx_v"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_send_lithdr_incidx_v")
+        stats[
+            "core_hpack_send_lithdr_notidx"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_send_lithdr_notidx")
+        stats[
+            "core_hpack_send_lithdr_notidx_v"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_send_lithdr_notidx_v")
+        stats[
+            "core_hpack_send_lithdr_nvridx"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_send_lithdr_nvridx")
+        stats[
+            "core_hpack_send_lithdr_nvridx_v"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_send_lithdr_nvridx_v")
+        stats[
+            "core_hpack_send_uncompressed"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_send_uncompressed")
+        stats["core_hpack_send_huffman"] = massage_qps_stats_helpers.counter(
+            core_stats, "hpack_send_huffman")
+        stats["core_hpack_send_binary"] = massage_qps_stats_helpers.counter(
+            core_stats, "hpack_send_binary")
+        stats[
+            "core_hpack_send_binary_base64"] = massage_qps_stats_helpers.counter(
+                core_stats, "hpack_send_binary_base64")
+        stats[
+            "core_combiner_locks_initiated"] = massage_qps_stats_helpers.counter(
+                core_stats, "combiner_locks_initiated")
+        stats[
+            "core_combiner_locks_scheduled_items"] = massage_qps_stats_helpers.counter(
+                core_stats, "combiner_locks_scheduled_items")
+        stats[
+            "core_combiner_locks_scheduled_final_items"] = massage_qps_stats_helpers.counter(
+                core_stats, "combiner_locks_scheduled_final_items")
+        stats[
+            "core_combiner_locks_offloaded"] = massage_qps_stats_helpers.counter(
+                core_stats, "combiner_locks_offloaded")
+        stats[
+            "core_call_combiner_locks_initiated"] = massage_qps_stats_helpers.counter(
+                core_stats, "call_combiner_locks_initiated")
+        stats[
+            "core_call_combiner_locks_scheduled_items"] = massage_qps_stats_helpers.counter(
+                core_stats, "call_combiner_locks_scheduled_items")
+        stats[
+            "core_call_combiner_set_notify_on_cancel"] = massage_qps_stats_helpers.counter(
+                core_stats, "call_combiner_set_notify_on_cancel")
+        stats[
+            "core_call_combiner_cancelled"] = massage_qps_stats_helpers.counter(
+                core_stats, "call_combiner_cancelled")
+        stats[
+            "core_executor_scheduled_short_items"] = massage_qps_stats_helpers.counter(
+                core_stats, "executor_scheduled_short_items")
+        stats[
+            "core_executor_scheduled_long_items"] = massage_qps_stats_helpers.counter(
+                core_stats, "executor_scheduled_long_items")
+        stats[
+            "core_executor_scheduled_to_self"] = massage_qps_stats_helpers.counter(
+                core_stats, "executor_scheduled_to_self")
+        stats[
+            "core_executor_wakeup_initiated"] = massage_qps_stats_helpers.counter(
+                core_stats, "executor_wakeup_initiated")
+        stats[
+            "core_executor_queue_drained"] = massage_qps_stats_helpers.counter(
+                core_stats, "executor_queue_drained")
+        stats["core_executor_push_retries"] = massage_qps_stats_helpers.counter(
+            core_stats, "executor_push_retries")
+        stats[
+            "core_server_requested_calls"] = massage_qps_stats_helpers.counter(
+                core_stats, "server_requested_calls")
+        stats[
+            "core_server_slowpath_requests_queued"] = massage_qps_stats_helpers.counter(
+                core_stats, "server_slowpath_requests_queued")
+        stats[
+            "core_cq_ev_queue_trylock_failures"] = massage_qps_stats_helpers.counter(
+                core_stats, "cq_ev_queue_trylock_failures")
+        stats[
+            "core_cq_ev_queue_trylock_successes"] = massage_qps_stats_helpers.counter(
+                core_stats, "cq_ev_queue_trylock_successes")
+        stats[
+            "core_cq_ev_queue_transient_pop_failures"] = massage_qps_stats_helpers.counter(
+                core_stats, "cq_ev_queue_transient_pop_failures")
+        h = massage_qps_stats_helpers.histogram(core_stats, "call_initial_size")
+        stats["core_call_initial_size"] = ",".join("%f" % x for x in h.buckets)
+        stats["core_call_initial_size_bkts"] = ",".join("%f" % x
+                                                        for x in h.boundaries)
+        stats[
+            "core_call_initial_size_50p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 50, h.boundaries)
+        stats[
+            "core_call_initial_size_95p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 95, h.boundaries)
+        stats[
+            "core_call_initial_size_99p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 99, h.boundaries)
+        h = massage_qps_stats_helpers.histogram(core_stats,
+                                                "poll_events_returned")
+        stats["core_poll_events_returned"] = ",".join("%f" % x
+                                                      for x in h.buckets)
+        stats["core_poll_events_returned_bkts"] = ",".join(
+            "%f" % x for x in h.boundaries)
+        stats[
+            "core_poll_events_returned_50p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 50, h.boundaries)
+        stats[
+            "core_poll_events_returned_95p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 95, h.boundaries)
+        stats[
+            "core_poll_events_returned_99p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 99, h.boundaries)
+        h = massage_qps_stats_helpers.histogram(core_stats, "tcp_write_size")
+        stats["core_tcp_write_size"] = ",".join("%f" % x for x in h.buckets)
+        stats["core_tcp_write_size_bkts"] = ",".join("%f" % x
+                                                     for x in h.boundaries)
+        stats["core_tcp_write_size_50p"] = massage_qps_stats_helpers.percentile(
+            h.buckets, 50, h.boundaries)
+        stats["core_tcp_write_size_95p"] = massage_qps_stats_helpers.percentile(
+            h.buckets, 95, h.boundaries)
+        stats["core_tcp_write_size_99p"] = massage_qps_stats_helpers.percentile(
+            h.buckets, 99, h.boundaries)
+        h = massage_qps_stats_helpers.histogram(core_stats,
+                                                "tcp_write_iov_size")
+        stats["core_tcp_write_iov_size"] = ",".join("%f" % x for x in h.buckets)
+        stats["core_tcp_write_iov_size_bkts"] = ",".join("%f" % x
+                                                         for x in h.boundaries)
+        stats[
+            "core_tcp_write_iov_size_50p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 50, h.boundaries)
+        stats[
+            "core_tcp_write_iov_size_95p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 95, h.boundaries)
+        stats[
+            "core_tcp_write_iov_size_99p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 99, h.boundaries)
+        h = massage_qps_stats_helpers.histogram(core_stats, "tcp_read_size")
+        stats["core_tcp_read_size"] = ",".join("%f" % x for x in h.buckets)
+        stats["core_tcp_read_size_bkts"] = ",".join("%f" % x
+                                                    for x in h.boundaries)
+        stats["core_tcp_read_size_50p"] = massage_qps_stats_helpers.percentile(
+            h.buckets, 50, h.boundaries)
+        stats["core_tcp_read_size_95p"] = massage_qps_stats_helpers.percentile(
+            h.buckets, 95, h.boundaries)
+        stats["core_tcp_read_size_99p"] = massage_qps_stats_helpers.percentile(
+            h.buckets, 99, h.boundaries)
+        h = massage_qps_stats_helpers.histogram(core_stats, "tcp_read_offer")
+        stats["core_tcp_read_offer"] = ",".join("%f" % x for x in h.buckets)
+        stats["core_tcp_read_offer_bkts"] = ",".join("%f" % x
+                                                     for x in h.boundaries)
+        stats["core_tcp_read_offer_50p"] = massage_qps_stats_helpers.percentile(
+            h.buckets, 50, h.boundaries)
+        stats["core_tcp_read_offer_95p"] = massage_qps_stats_helpers.percentile(
+            h.buckets, 95, h.boundaries)
+        stats["core_tcp_read_offer_99p"] = massage_qps_stats_helpers.percentile(
+            h.buckets, 99, h.boundaries)
+        h = massage_qps_stats_helpers.histogram(core_stats,
+                                                "tcp_read_offer_iov_size")
+        stats["core_tcp_read_offer_iov_size"] = ",".join("%f" % x
+                                                         for x in h.buckets)
+        stats["core_tcp_read_offer_iov_size_bkts"] = ",".join(
+            "%f" % x for x in h.boundaries)
+        stats[
+            "core_tcp_read_offer_iov_size_50p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 50, h.boundaries)
+        stats[
+            "core_tcp_read_offer_iov_size_95p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 95, h.boundaries)
+        stats[
+            "core_tcp_read_offer_iov_size_99p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 99, h.boundaries)
+        h = massage_qps_stats_helpers.histogram(core_stats,
+                                                "http2_send_message_size")
+        stats["core_http2_send_message_size"] = ",".join("%f" % x
+                                                         for x in h.buckets)
+        stats["core_http2_send_message_size_bkts"] = ",".join(
+            "%f" % x for x in h.boundaries)
+        stats[
+            "core_http2_send_message_size_50p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 50, h.boundaries)
+        stats[
+            "core_http2_send_message_size_95p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 95, h.boundaries)
+        stats[
+            "core_http2_send_message_size_99p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 99, h.boundaries)
+        h = massage_qps_stats_helpers.histogram(
+            core_stats, "http2_send_initial_metadata_per_write")
+        stats["core_http2_send_initial_metadata_per_write"] = ",".join(
+            "%f" % x for x in h.buckets)
+        stats["core_http2_send_initial_metadata_per_write_bkts"] = ",".join(
+            "%f" % x for x in h.boundaries)
+        stats[
+            "core_http2_send_initial_metadata_per_write_50p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 50, h.boundaries)
+        stats[
+            "core_http2_send_initial_metadata_per_write_95p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 95, h.boundaries)
+        stats[
+            "core_http2_send_initial_metadata_per_write_99p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 99, h.boundaries)
+        h = massage_qps_stats_helpers.histogram(core_stats,
+                                                "http2_send_message_per_write")
+        stats["core_http2_send_message_per_write"] = ",".join(
+            "%f" % x for x in h.buckets)
+        stats["core_http2_send_message_per_write_bkts"] = ",".join(
+            "%f" % x for x in h.boundaries)
+        stats[
+            "core_http2_send_message_per_write_50p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 50, h.boundaries)
+        stats[
+            "core_http2_send_message_per_write_95p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 95, h.boundaries)
+        stats[
+            "core_http2_send_message_per_write_99p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 99, h.boundaries)
+        h = massage_qps_stats_helpers.histogram(
+            core_stats, "http2_send_trailing_metadata_per_write")
+        stats["core_http2_send_trailing_metadata_per_write"] = ",".join(
+            "%f" % x for x in h.buckets)
+        stats["core_http2_send_trailing_metadata_per_write_bkts"] = ",".join(
+            "%f" % x for x in h.boundaries)
+        stats[
+            "core_http2_send_trailing_metadata_per_write_50p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 50, h.boundaries)
+        stats[
+            "core_http2_send_trailing_metadata_per_write_95p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 95, h.boundaries)
+        stats[
+            "core_http2_send_trailing_metadata_per_write_99p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 99, h.boundaries)
+        h = massage_qps_stats_helpers.histogram(core_stats,
+                                                "http2_send_flowctl_per_write")
+        stats["core_http2_send_flowctl_per_write"] = ",".join(
+            "%f" % x for x in h.buckets)
+        stats["core_http2_send_flowctl_per_write_bkts"] = ",".join(
+            "%f" % x for x in h.boundaries)
+        stats[
+            "core_http2_send_flowctl_per_write_50p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 50, h.boundaries)
+        stats[
+            "core_http2_send_flowctl_per_write_95p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 95, h.boundaries)
+        stats[
+            "core_http2_send_flowctl_per_write_99p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 99, h.boundaries)
+        h = massage_qps_stats_helpers.histogram(core_stats,
+                                                "server_cqs_checked")
+        stats["core_server_cqs_checked"] = ",".join("%f" % x for x in h.buckets)
+        stats["core_server_cqs_checked_bkts"] = ",".join("%f" % x
+                                                         for x in h.boundaries)
+        stats[
+            "core_server_cqs_checked_50p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 50, h.boundaries)
+        stats[
+            "core_server_cqs_checked_95p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 95, h.boundaries)
+        stats[
+            "core_server_cqs_checked_99p"] = massage_qps_stats_helpers.percentile(
+                h.buckets, 99, h.boundaries)
diff --git a/tools/run_tests/performance/massage_qps_stats_helpers.py b/tools/run_tests/performance/massage_qps_stats_helpers.py
index a2fe4ae6c3..108451cd55 100644
--- a/tools/run_tests/performance/massage_qps_stats_helpers.py
+++ b/tools/run_tests/performance/massage_qps_stats_helpers.py
@@ -14,44 +14,49 @@
 
 import collections
 
+
 def _threshold_for_count_below(buckets, boundaries, count_below):
-  count_so_far = 0
-  for lower_idx in range(0, len(buckets)):
-    count_so_far += buckets[lower_idx]
-    if count_so_far >= count_below:
-      break
-  if count_so_far == count_below:
-    # this bucket hits the threshold exactly... we should be midway through
-    # any run of zero values following the bucket
-    for upper_idx in range(lower_idx + 1, len(buckets)):
-      if buckets[upper_idx] != 0:
-        break
-    return (boundaries[lower_idx] + boundaries[upper_idx]) / 2.0
-  else:
-    # treat values as uniform throughout the bucket, and find where this value
-    # should lie
-    lower_bound = boundaries[lower_idx]
-    upper_bound = boundaries[lower_idx + 1]
-    return (upper_bound -
-           (upper_bound - lower_bound) * (count_so_far - count_below) /
-               float(buckets[lower_idx]))
+    count_so_far = 0
+    for lower_idx in range(0, len(buckets)):
+        count_so_far += buckets[lower_idx]
+        if count_so_far >= count_below:
+            break
+    if count_so_far == count_below:
+        # this bucket hits the threshold exactly... we should be midway through
+        # any run of zero values following the bucket
+        for upper_idx in range(lower_idx + 1, len(buckets)):
+            if buckets[upper_idx] != 0:
+                break
+        return (boundaries[lower_idx] + boundaries[upper_idx]) / 2.0
+    else:
+        # treat values as uniform throughout the bucket, and find where this value
+        # should lie
+        lower_bound = boundaries[lower_idx]
+        upper_bound = boundaries[lower_idx + 1]
+        return (upper_bound - (upper_bound - lower_bound) *
+                (count_so_far - count_below) / float(buckets[lower_idx]))
+
 
 def percentile(buckets, pctl, boundaries):
-  return _threshold_for_count_below(
-      buckets, boundaries, sum(buckets) * pctl / 100.0)
+    return _threshold_for_count_below(buckets, boundaries,
+                                      sum(buckets) * pctl / 100.0)
+
 
 def counter(core_stats, name):
-  for stat in core_stats['metrics']:
-    if stat['name'] == name:
-      return int(stat.get('count', 0))
+    for stat in core_stats['metrics']:
+        if stat['name'] == name:
+            return int(stat.get('count', 0))
+
 
 Histogram = collections.namedtuple('Histogram', 'buckets boundaries')
+
+
 def histogram(core_stats, name):
-  for stat in core_stats['metrics']:
-    if stat['name'] == name:
-      buckets = []
-      boundaries = []
-      for b in stat['histogram']['buckets']:
-        buckets.append(int(b.get('count', 0)))
-        boundaries.append(int(b.get('start', 0)))
-  return Histogram(buckets=buckets, boundaries=boundaries)
+    for stat in core_stats['metrics']:
+        if stat['name'] == name:
+            buckets = []
+            boundaries = []
+            for b in stat['histogram']['buckets']:
+                buckets.append(int(b.get('count', 0)))
+                boundaries.append(int(b.get('start', 0)))
+    return Histogram(buckets=buckets, boundaries=boundaries)
diff --git a/tools/run_tests/performance/patch_scenario_results_schema.py b/tools/run_tests/performance/patch_scenario_results_schema.py
index 81ba5381b3..2a2aadc242 100755
--- a/tools/run_tests/performance/patch_scenario_results_schema.py
+++ b/tools/run_tests/performance/patch_scenario_results_schema.py
@@ -25,27 +25,32 @@ import sys
 import time
 import uuid
 
-
-gcp_utils_dir = os.path.abspath(os.path.join(
-    os.path.dirname(__file__), '../../gcp/utils'))
+gcp_utils_dir = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), '../../gcp/utils'))
 sys.path.append(gcp_utils_dir)
 import big_query_utils
 
+_PROJECT_ID = 'grpc-testing'
 
-_PROJECT_ID='grpc-testing'
 
 def _patch_results_table(dataset_id, table_id):
-  bq = big_query_utils.create_big_query()
-  with open(os.path.dirname(__file__) + '/scenario_result_schema.json', 'r') as f:
-    table_schema = json.loads(f.read())
-  desc = 'Results of performance benchmarks.'
-  return big_query_utils.patch_table(bq, _PROJECT_ID, dataset_id,
-                                     table_id, table_schema)
-
-
-argp = argparse.ArgumentParser(description='Patch schema of scenario results table.')
-argp.add_argument('--bq_result_table', required=True, default=None, type=str,
-                  help='Bigquery "dataset.table" to patch.')
+    bq = big_query_utils.create_big_query()
+    with open(os.path.dirname(__file__) + '/scenario_result_schema.json',
+              'r') as f:
+        table_schema = json.loads(f.read())
+    desc = 'Results of performance benchmarks.'
+    return big_query_utils.patch_table(bq, _PROJECT_ID, dataset_id, table_id,
+                                       table_schema)
+
+
+argp = argparse.ArgumentParser(
+    description='Patch schema of scenario results table.')
+argp.add_argument(
+    '--bq_result_table',
+    required=True,
+    default=None,
+    type=str,
+    help='Bigquery "dataset.table" to patch.')
 
 args = argp.parse_args()
 
diff --git a/tools/run_tests/performance/scenario_config.py b/tools/run_tests/performance/scenario_config.py
index cafac3dfad..e92de5898c 100644
--- a/tools/run_tests/performance/scenario_config.py
+++ b/tools/run_tests/performance/scenario_config.py
@@ -16,66 +16,64 @@
 
 import math
 
-WARMUP_SECONDS=5
-JAVA_WARMUP_SECONDS=15  # Java needs more warmup time for JIT to kick in.
-BENCHMARK_SECONDS=30
-
-SMOKETEST='smoketest'
-SCALABLE='scalable'
-INPROC='inproc'
-SWEEP='sweep'
-DEFAULT_CATEGORIES=[SCALABLE, SMOKETEST]
-
-SECURE_SECARGS = {'use_test_ca': True,
-                  'server_host_override': 'foo.test.google.fr'}
+WARMUP_SECONDS = 5
+JAVA_WARMUP_SECONDS = 15  # Java needs more warmup time for JIT to kick in.
+BENCHMARK_SECONDS = 30
+
+SMOKETEST = 'smoketest'
+SCALABLE = 'scalable'
+INPROC = 'inproc'
+SWEEP = 'sweep'
+DEFAULT_CATEGORIES = [SCALABLE, SMOKETEST]
+
+SECURE_SECARGS = {
+    'use_test_ca': True,
+    'server_host_override': 'foo.test.google.fr'
+}
 
 HISTOGRAM_PARAMS = {
-  'resolution': 0.01,
-  'max_possible': 60e9,
+    'resolution': 0.01,
+    'max_possible': 60e9,
 }
 
 # target number of RPCs outstanding on across all client channels in
 # non-ping-pong tests (since we can only specify per-channel numbers, the
 # actual target will be slightly higher)
-OUTSTANDING_REQUESTS={
-    'async': 6400,
-    'async-limited': 800,
-    'sync': 1000
-}
+OUTSTANDING_REQUESTS = {'async': 6400, 'async-limited': 800, 'sync': 1000}
 
 # wide is the number of client channels in multi-channel tests (1 otherwise)
-WIDE=64
+WIDE = 64
 
 
 def _get_secargs(is_secure):
-  if is_secure:
-    return SECURE_SECARGS
-  else:
-    return None
+    if is_secure:
+        return SECURE_SECARGS
+    else:
+        return None
 
 
 def remove_nonproto_fields(scenario):
-  """Remove special-purpose that contains some extra info about the scenario
+    """Remove special-purpose that contains some extra info about the scenario
   but don't belong to the ScenarioConfig protobuf message"""
-  scenario.pop('CATEGORIES', None)
-  scenario.pop('CLIENT_LANGUAGE', None)
-  scenario.pop('SERVER_LANGUAGE', None)
-  scenario.pop('EXCLUDED_POLL_ENGINES', None)
-  return scenario
+    scenario.pop('CATEGORIES', None)
+    scenario.pop('CLIENT_LANGUAGE', None)
+    scenario.pop('SERVER_LANGUAGE', None)
+    scenario.pop('EXCLUDED_POLL_ENGINES', None)
+    return scenario
 
 
 def geometric_progression(start, stop, step):
-  n = start
-  while n < stop:
-    yield int(round(n))
-    n *= step
+    n = start
+    while n < stop:
+        yield int(round(n))
+        n *= step
 
 
 def _payload_type(use_generic_payload, req_size, resp_size):
     r = {}
     sizes = {
-      'req_size': req_size,
-      'resp_size': resp_size,
+        'req_size': req_size,
+        'resp_size': resp_size,
     }
     if use_generic_payload:
         r['bytebuf_params'] = sizes
@@ -83,6 +81,7 @@ def _payload_type(use_generic_payload, req_size, resp_size):
         r['simple_params'] = sizes
     return r
 
+
 def _load_params(offered_load):
     r = {}
     if offered_load is None:
@@ -93,21 +92,25 @@ def _load_params(offered_load):
         r['poisson'] = load
     return r
 
+
 def _add_channel_arg(config, key, value):
-  if 'channel_args' in config:
-    channel_args = config['channel_args']
-  else:
-    channel_args = []
-    config['channel_args'] = channel_args
-  arg = {'name': key}
-  if isinstance(value, int):
-    arg['int_value'] = value
-  else:
-    arg['str_value'] = value
-  channel_args.append(arg)
-
-def _ping_pong_scenario(name, rpc_type,
-                        client_type, server_type,
+    if 'channel_args' in config:
+        channel_args = config['channel_args']
+    else:
+        channel_args = []
+        config['channel_args'] = channel_args
+    arg = {'name': key}
+    if isinstance(value, int):
+        arg['int_value'] = value
+    else:
+        arg['str_value'] = value
+    channel_args.append(arg)
+
+
+def _ping_pong_scenario(name,
+                        rpc_type,
+                        client_type,
+                        server_type,
                         secure=True,
                         use_generic_payload=False,
                         req_size=0,
@@ -128,824 +131,1029 @@ def _ping_pong_scenario(name, rpc_type,
                         excluded_poll_engines=[],
                         minimal_stack=False,
                         offered_load=None):
-  """Creates a basic ping pong scenario."""
-  scenario = {
-    'name': name,
-    'num_servers': 1,
-    'num_clients': 1,
-    'client_config': {
-      'client_type': client_type,
-      'security_params': _get_secargs(secure),
-      'outstanding_rpcs_per_channel': 1,
-      'client_channels': 1,
-      'async_client_threads': 1,
-      'threads_per_cq': client_threads_per_cq,
-      'rpc_type': rpc_type,
-      'histogram_params': HISTOGRAM_PARAMS,
-      'channel_args': [],
-    },
-    'server_config': {
-      'server_type': server_type,
-      'security_params': _get_secargs(secure),
-      'async_server_threads': async_server_threads,
-      'threads_per_cq': server_threads_per_cq,
-      'channel_args': [],
-    },
-    'warmup_seconds': warmup_seconds,
-    'benchmark_seconds': BENCHMARK_SECONDS
-  }
-  if resource_quota_size:
-    scenario['server_config']['resource_quota_size'] = resource_quota_size
-  if use_generic_payload:
-    if server_type != 'ASYNC_GENERIC_SERVER':
-      raise Exception('Use ASYNC_GENERIC_SERVER for generic payload.')
-    scenario['server_config']['payload_config'] = _payload_type(use_generic_payload, req_size, resp_size)
-
-  scenario['client_config']['payload_config'] = _payload_type(use_generic_payload, req_size, resp_size)
-
-  # Optimization target of 'throughput' does not work well with epoll1 polling
-  # engine. Use the default value of 'blend'
-  optimization_target = 'throughput'
-
-  if unconstrained_client:
-    outstanding_calls = outstanding if outstanding is not None else OUTSTANDING_REQUESTS[unconstrained_client]
-    # clamp buffer usage to something reasonable (16 gig for now)
-    MAX_MEMORY_USE = 16 * 1024 * 1024 * 1024
-    if outstanding_calls * max(req_size, resp_size) > MAX_MEMORY_USE:
-        outstanding_calls = max(1, MAX_MEMORY_USE / max(req_size, resp_size))
-    wide = channels if channels is not None else WIDE
-    deep = int(math.ceil(1.0 * outstanding_calls / wide))
-
-    scenario['num_clients'] = num_clients if num_clients is not None else 0  # use as many clients as available.
-    scenario['client_config']['outstanding_rpcs_per_channel'] = deep
-    scenario['client_config']['client_channels'] = wide
-    scenario['client_config']['async_client_threads'] = 0
-    if offered_load is not None:
+    """Creates a basic ping pong scenario."""
+    scenario = {
+        'name': name,
+        'num_servers': 1,
+        'num_clients': 1,
+        'client_config': {
+            'client_type': client_type,
+            'security_params': _get_secargs(secure),
+            'outstanding_rpcs_per_channel': 1,
+            'client_channels': 1,
+            'async_client_threads': 1,
+            'threads_per_cq': client_threads_per_cq,
+            'rpc_type': rpc_type,
+            'histogram_params': HISTOGRAM_PARAMS,
+            'channel_args': [],
+        },
+        'server_config': {
+            'server_type': server_type,
+            'security_params': _get_secargs(secure),
+            'async_server_threads': async_server_threads,
+            'threads_per_cq': server_threads_per_cq,
+            'channel_args': [],
+        },
+        'warmup_seconds': warmup_seconds,
+        'benchmark_seconds': BENCHMARK_SECONDS
+    }
+    if resource_quota_size:
+        scenario['server_config']['resource_quota_size'] = resource_quota_size
+    if use_generic_payload:
+        if server_type != 'ASYNC_GENERIC_SERVER':
+            raise Exception('Use ASYNC_GENERIC_SERVER for generic payload.')
+        scenario['server_config']['payload_config'] = _payload_type(
+            use_generic_payload, req_size, resp_size)
+
+    scenario['client_config']['payload_config'] = _payload_type(
+        use_generic_payload, req_size, resp_size)
+
+    # Optimization target of 'throughput' does not work well with epoll1 polling
+    # engine. Use the default value of 'blend'
+    optimization_target = 'throughput'
+
+    if unconstrained_client:
+        outstanding_calls = outstanding if outstanding is not None else OUTSTANDING_REQUESTS[
+            unconstrained_client]
+        # clamp buffer usage to something reasonable (16 gig for now)
+        MAX_MEMORY_USE = 16 * 1024 * 1024 * 1024
+        if outstanding_calls * max(req_size, resp_size) > MAX_MEMORY_USE:
+            outstanding_calls = max(1, MAX_MEMORY_USE / max(req_size,
+                                                            resp_size))
+        wide = channels if channels is not None else WIDE
+        deep = int(math.ceil(1.0 * outstanding_calls / wide))
+
+        scenario[
+            'num_clients'] = num_clients if num_clients is not None else 0  # use as many clients as available.
+        scenario['client_config']['outstanding_rpcs_per_channel'] = deep
+        scenario['client_config']['client_channels'] = wide
+        scenario['client_config']['async_client_threads'] = 0
+        if offered_load is not None:
+            optimization_target = 'latency'
+    else:
+        scenario['client_config']['outstanding_rpcs_per_channel'] = 1
+        scenario['client_config']['client_channels'] = 1
+        scenario['client_config']['async_client_threads'] = 1
         optimization_target = 'latency'
-  else:
-    scenario['client_config']['outstanding_rpcs_per_channel'] = 1
-    scenario['client_config']['client_channels'] = 1
-    scenario['client_config']['async_client_threads'] = 1
-    optimization_target = 'latency'
-
-  scenario['client_config']['load_params'] = _load_params(offered_load)
-
-  optimization_channel_arg = {
-    'name': 'grpc.optimization_target',
-    'str_value': optimization_target
-  }
-  scenario['client_config']['channel_args'].append(optimization_channel_arg)
-  scenario['server_config']['channel_args'].append(optimization_channel_arg)
-
-  if minimal_stack:
-    _add_channel_arg(scenario['client_config'], 'grpc.minimal_stack', 1)
-    _add_channel_arg(scenario['server_config'], 'grpc.minimal_stack', 1)
-
-  if messages_per_stream:
-    scenario['client_config']['messages_per_stream'] = messages_per_stream
-  if client_language:
-    # the CLIENT_LANGUAGE field is recognized by run_performance_tests.py
-    scenario['CLIENT_LANGUAGE'] = client_language
-  if server_language:
-    # the SERVER_LANGUAGE field is recognized by run_performance_tests.py
-    scenario['SERVER_LANGUAGE'] = server_language
-  if categories:
-    scenario['CATEGORIES'] = categories
-  if len(excluded_poll_engines):
-    # The polling engines for which this scenario is excluded
-    scenario['EXCLUDED_POLL_ENGINES'] = excluded_poll_engines
-  return scenario
+
+    scenario['client_config']['load_params'] = _load_params(offered_load)
+
+    optimization_channel_arg = {
+        'name': 'grpc.optimization_target',
+        'str_value': optimization_target
+    }
+    scenario['client_config']['channel_args'].append(optimization_channel_arg)
+    scenario['server_config']['channel_args'].append(optimization_channel_arg)
+
+    if minimal_stack:
+        _add_channel_arg(scenario['client_config'], 'grpc.minimal_stack', 1)
+        _add_channel_arg(scenario['server_config'], 'grpc.minimal_stack', 1)
+
+    if messages_per_stream:
+        scenario['client_config']['messages_per_stream'] = messages_per_stream
+    if client_language:
+        # the CLIENT_LANGUAGE field is recognized by run_performance_tests.py
+        scenario['CLIENT_LANGUAGE'] = client_language
+    if server_language:
+        # the SERVER_LANGUAGE field is recognized by run_performance_tests.py
+        scenario['SERVER_LANGUAGE'] = server_language
+    if categories:
+        scenario['CATEGORIES'] = categories
+    if len(excluded_poll_engines):
+        # The polling engines for which this scenario is excluded
+        scenario['EXCLUDED_POLL_ENGINES'] = excluded_poll_engines
+    return scenario
 
 
 class CXXLanguage:
 
-  def __init__(self):
-    self.safename = 'cxx'
-
-  def worker_cmdline(self):
-    return ['bins/opt/qps_worker']
-
-  def worker_port_offset(self):
-    return 0
-
-  def scenarios(self):
-    # TODO(ctiller): add 70% load latency test
-    yield _ping_pong_scenario(
-      'cpp_protobuf_async_unary_1channel_100rpcs_1MB', rpc_type='UNARY',
-      client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-      req_size=1024*1024, resp_size=1024*1024,
-      unconstrained_client='async', outstanding=100, channels=1,
-      num_clients=1,
-      secure=False,
-      categories=[SMOKETEST] + [INPROC] + [SCALABLE])
-
-    yield _ping_pong_scenario(
-      'cpp_protobuf_async_streaming_from_client_1channel_1MB', rpc_type='STREAMING_FROM_CLIENT',
-      client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-      req_size=1024*1024, resp_size=1024*1024,
-      unconstrained_client='async', outstanding=1, channels=1,
-      num_clients=1,
-      secure=False,
-      categories=[SMOKETEST] + [INPROC] + [SCALABLE])
-
-    yield _ping_pong_scenario(
-       'cpp_protobuf_async_unary_75Kqps_600channel_60Krpcs_300Breq_50Bresp',
-       rpc_type='UNARY', client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-       req_size=300, resp_size=50,
-       unconstrained_client='async', outstanding=30000, channels=300,
-       offered_load=37500, secure=False,
-       async_server_threads=16, server_threads_per_cq=1,
-       categories=[SMOKETEST] + [SCALABLE])
-
-    for secure in [True, False]:
-      secstr = 'secure' if secure else 'insecure'
-      smoketest_categories = ([SMOKETEST] if secure else [INPROC]) + [SCALABLE]
-
-      yield _ping_pong_scenario(
-          'cpp_generic_async_streaming_ping_pong_%s' % secstr,
-          rpc_type='STREAMING',
-          client_type='ASYNC_CLIENT',
-          server_type='ASYNC_GENERIC_SERVER',
-          use_generic_payload=True, async_server_threads=1,
-          secure=secure,
-          categories=smoketest_categories)
-
-      yield _ping_pong_scenario(
-          'cpp_generic_async_streaming_qps_unconstrained_%s' % secstr,
-          rpc_type='STREAMING',
-          client_type='ASYNC_CLIENT',
-          server_type='ASYNC_GENERIC_SERVER',
-          unconstrained_client='async', use_generic_payload=True,
-          secure=secure,
-          minimal_stack=not secure,
-          categories=smoketest_categories+[SCALABLE])
-
-      for mps in geometric_progression(1, 20, 10):
-        yield _ping_pong_scenario(
-            'cpp_generic_async_streaming_qps_unconstrained_%smps_%s' % (mps, secstr),
-            rpc_type='STREAMING',
+    def __init__(self):
+        self.safename = 'cxx'
+
+    def worker_cmdline(self):
+        return ['bins/opt/qps_worker']
+
+    def worker_port_offset(self):
+        return 0
+
+    def scenarios(self):
+        # TODO(ctiller): add 70% load latency test
+        yield _ping_pong_scenario(
+            'cpp_protobuf_async_unary_1channel_100rpcs_1MB',
+            rpc_type='UNARY',
             client_type='ASYNC_CLIENT',
-            server_type='ASYNC_GENERIC_SERVER',
-            unconstrained_client='async', use_generic_payload=True,
-            secure=secure, messages_per_stream=mps,
-            minimal_stack=not secure,
-            categories=smoketest_categories+[SCALABLE])
+            server_type='ASYNC_SERVER',
+            req_size=1024 * 1024,
+            resp_size=1024 * 1024,
+            unconstrained_client='async',
+            outstanding=100,
+            channels=1,
+            num_clients=1,
+            secure=False,
+            categories=[SMOKETEST] + [INPROC] + [SCALABLE])
 
-      for mps in geometric_progression(1, 200, math.sqrt(10)):
         yield _ping_pong_scenario(
-            'cpp_generic_async_streaming_qps_unconstrained_%smps_%s' % (mps, secstr),
-            rpc_type='STREAMING',
+            'cpp_protobuf_async_streaming_from_client_1channel_1MB',
+            rpc_type='STREAMING_FROM_CLIENT',
             client_type='ASYNC_CLIENT',
-            server_type='ASYNC_GENERIC_SERVER',
-            unconstrained_client='async', use_generic_payload=True,
-            secure=secure, messages_per_stream=mps,
-            minimal_stack=not secure,
-            categories=[SWEEP])
-
-      yield _ping_pong_scenario(
-          'cpp_generic_async_streaming_qps_1channel_1MBmsg_%s' % secstr,
-          rpc_type='STREAMING',
-          req_size=1024*1024,
-          resp_size=1024*1024,
-          client_type='ASYNC_CLIENT',
-          server_type='ASYNC_GENERIC_SERVER',
-          unconstrained_client='async', use_generic_payload=True,
-          secure=secure,
-          minimal_stack=not secure,
-          categories=smoketest_categories+[SCALABLE],
-          channels=1, outstanding=100)
-
-      yield _ping_pong_scenario(
-          'cpp_generic_async_streaming_qps_unconstrained_64KBmsg_%s' % secstr,
-          rpc_type='STREAMING',
-          req_size=64*1024,
-          resp_size=64*1024,
-          client_type='ASYNC_CLIENT',
-          server_type='ASYNC_GENERIC_SERVER',
-          unconstrained_client='async', use_generic_payload=True,
-          secure=secure,
-          minimal_stack=not secure,
-          categories=smoketest_categories+[SCALABLE])
-
-      # TODO(https://github.com/grpc/grpc/issues/11500) Re-enable this test
-      #yield _ping_pong_scenario(
-      #    'cpp_generic_async_streaming_qps_unconstrained_1cq_%s' % secstr,
-      #    rpc_type='STREAMING',
-      #    client_type='ASYNC_CLIENT',
-      #    server_type='ASYNC_GENERIC_SERVER',
-      #    unconstrained_client='async-limited', use_generic_payload=True,
-      #    secure=secure,
-      #    client_threads_per_cq=1000000, server_threads_per_cq=1000000,
-      #    categories=smoketest_categories+[SCALABLE])
-
-      yield _ping_pong_scenario(
-          'cpp_generic_async_streaming_qps_unconstrained_2waysharedcq_%s' % secstr,
-          rpc_type='STREAMING',
-          client_type='ASYNC_CLIENT',
-          server_type='ASYNC_GENERIC_SERVER',
-          unconstrained_client='async', use_generic_payload=True,
-          secure=secure,
-          client_threads_per_cq=2, server_threads_per_cq=2,
-          categories=smoketest_categories+[SCALABLE])
-
-      #yield _ping_pong_scenario(
-      #    'cpp_protobuf_async_streaming_qps_unconstrained_1cq_%s' % secstr,
-      #    rpc_type='STREAMING',
-      #    client_type='ASYNC_CLIENT',
-      #    server_type='ASYNC_SERVER',
-      #    unconstrained_client='async-limited',
-      #    secure=secure,
-      #    client_threads_per_cq=1000000, server_threads_per_cq=1000000,
-      #    categories=smoketest_categories+[SCALABLE])
-
-      yield _ping_pong_scenario(
-          'cpp_protobuf_async_streaming_qps_unconstrained_2waysharedcq_%s' % secstr,
-          rpc_type='STREAMING',
-          client_type='ASYNC_CLIENT',
-          server_type='ASYNC_SERVER',
-          unconstrained_client='async',
-          secure=secure,
-          client_threads_per_cq=2, server_threads_per_cq=2,
-          categories=smoketest_categories+[SCALABLE])
-
-      #yield _ping_pong_scenario(
-      #    'cpp_protobuf_async_unary_qps_unconstrained_1cq_%s' % secstr,
-      #    rpc_type='UNARY',
-      #    client_type='ASYNC_CLIENT',
-      #    server_type='ASYNC_SERVER',
-      #    unconstrained_client='async-limited',
-      #    secure=secure,
-      #    client_threads_per_cq=1000000, server_threads_per_cq=1000000,
-      #    categories=smoketest_categories+[SCALABLE])
-
-      yield _ping_pong_scenario(
-          'cpp_protobuf_async_unary_qps_unconstrained_2waysharedcq_%s' % secstr,
-          rpc_type='UNARY',
-          client_type='ASYNC_CLIENT',
-          server_type='ASYNC_SERVER',
-          unconstrained_client='async',
-          secure=secure,
-          client_threads_per_cq=2, server_threads_per_cq=2,
-          categories=smoketest_categories+[SCALABLE])
-
-      yield _ping_pong_scenario(
-          'cpp_generic_async_streaming_qps_one_server_core_%s' % secstr,
-          rpc_type='STREAMING',
-          client_type='ASYNC_CLIENT',
-          server_type='ASYNC_GENERIC_SERVER',
-          unconstrained_client='async-limited', use_generic_payload=True,
-          async_server_threads=1,
-          minimal_stack=not secure,
-          secure=secure)
-
-      yield _ping_pong_scenario(
-          'cpp_protobuf_async_client_sync_server_unary_qps_unconstrained_%s' %
-          (secstr),
-          rpc_type='UNARY',
-          client_type='ASYNC_CLIENT',
-          server_type='SYNC_SERVER',
-          unconstrained_client='async',
-          secure=secure,
-          minimal_stack=not secure,
-          categories=smoketest_categories + [SCALABLE],
-          excluded_poll_engines = ['poll-cv'])
-
-      yield _ping_pong_scenario(
-          'cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_%s' %
-          (secstr),
-          rpc_type='UNARY',
-          client_type='ASYNC_CLIENT',
-          server_type='ASYNC_SERVER',
-          channels=1,
-          outstanding=64,
-          req_size=128,
-          resp_size=8*1024*1024,
-          secure=secure,
-          minimal_stack=not secure,
-          categories=smoketest_categories + [SCALABLE])
-
-      yield _ping_pong_scenario(
-          'cpp_protobuf_async_client_sync_server_streaming_qps_unconstrained_%s' % secstr,
-          rpc_type='STREAMING',
-          client_type='ASYNC_CLIENT',
-          server_type='SYNC_SERVER',
-          unconstrained_client='async',
-          secure=secure,
-          minimal_stack=not secure,
-          categories=smoketest_categories+[SCALABLE],
-          excluded_poll_engines = ['poll-cv'])
-
-      yield _ping_pong_scenario(
-        'cpp_protobuf_async_unary_ping_pong_%s_1MB' % secstr, rpc_type='UNARY',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-        req_size=1024*1024, resp_size=1024*1024,
-        secure=secure,
-        minimal_stack=not secure,
-        categories=smoketest_categories + [SCALABLE])
-
-      for rpc_type in ['unary', 'streaming', 'streaming_from_client', 'streaming_from_server']:
-        for synchronicity in ['sync', 'async']:
-          yield _ping_pong_scenario(
-              'cpp_protobuf_%s_%s_ping_pong_%s' % (synchronicity, rpc_type, secstr),
-              rpc_type=rpc_type.upper(),
-              client_type='%s_CLIENT' % synchronicity.upper(),
-              server_type='%s_SERVER' % synchronicity.upper(),
-              async_server_threads=1,
-              minimal_stack=not secure,
-              secure=secure)
-
-          for size in geometric_progression(1, 1024*1024*1024+1, 8):
-              yield _ping_pong_scenario(
-                  'cpp_protobuf_%s_%s_qps_unconstrained_%s_%db' % (synchronicity, rpc_type, secstr, size),
-                  rpc_type=rpc_type.upper(),
-                  req_size=size,
-                  resp_size=size,
-                  client_type='%s_CLIENT' % synchronicity.upper(),
-                  server_type='%s_SERVER' % synchronicity.upper(),
-                  unconstrained_client=synchronicity,
-                  secure=secure,
-                  minimal_stack=not secure,
-                  categories=[SWEEP])
-
-          yield _ping_pong_scenario(
-              'cpp_protobuf_%s_%s_qps_unconstrained_%s' % (synchronicity, rpc_type, secstr),
-              rpc_type=rpc_type.upper(),
-              client_type='%s_CLIENT' % synchronicity.upper(),
-              server_type='%s_SERVER' % synchronicity.upper(),
-              unconstrained_client=synchronicity,
-              secure=secure,
-              minimal_stack=not secure,
-              server_threads_per_cq=3,
-              client_threads_per_cq=3,
-              categories=smoketest_categories+[SCALABLE])
-
-          # TODO(vjpai): Re-enable this test. It has a lot of timeouts
-          # and hasn't yet been conclusively identified as a test failure
-          # or race in the library
-          # yield _ping_pong_scenario(
-          #     'cpp_protobuf_%s_%s_qps_unconstrained_%s_500kib_resource_quota' % (synchronicity, rpc_type, secstr),
-          #     rpc_type=rpc_type.upper(),
-          #     client_type='%s_CLIENT' % synchronicity.upper(),
-          #     server_type='%s_SERVER' % synchronicity.upper(),
-          #     unconstrained_client=synchronicity,
-          #     secure=secure,
-          #     categories=smoketest_categories+[SCALABLE],
-          #     resource_quota_size=500*1024)
-
-          if rpc_type == 'streaming':
+            server_type='ASYNC_SERVER',
+            req_size=1024 * 1024,
+            resp_size=1024 * 1024,
+            unconstrained_client='async',
+            outstanding=1,
+            channels=1,
+            num_clients=1,
+            secure=False,
+            categories=[SMOKETEST] + [INPROC] + [SCALABLE])
+
+        yield _ping_pong_scenario(
+            'cpp_protobuf_async_unary_75Kqps_600channel_60Krpcs_300Breq_50Bresp',
+            rpc_type='UNARY',
+            client_type='ASYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            req_size=300,
+            resp_size=50,
+            unconstrained_client='async',
+            outstanding=30000,
+            channels=300,
+            offered_load=37500,
+            secure=False,
+            async_server_threads=16,
+            server_threads_per_cq=1,
+            categories=[SMOKETEST] + [SCALABLE])
+
+        for secure in [True, False]:
+            secstr = 'secure' if secure else 'insecure'
+            smoketest_categories = ([SMOKETEST]
+                                    if secure else [INPROC]) + [SCALABLE]
+
+            yield _ping_pong_scenario(
+                'cpp_generic_async_streaming_ping_pong_%s' % secstr,
+                rpc_type='STREAMING',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_GENERIC_SERVER',
+                use_generic_payload=True,
+                async_server_threads=1,
+                secure=secure,
+                categories=smoketest_categories)
+
+            yield _ping_pong_scenario(
+                'cpp_generic_async_streaming_qps_unconstrained_%s' % secstr,
+                rpc_type='STREAMING',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_GENERIC_SERVER',
+                unconstrained_client='async',
+                use_generic_payload=True,
+                secure=secure,
+                minimal_stack=not secure,
+                categories=smoketest_categories + [SCALABLE])
+
             for mps in geometric_progression(1, 20, 10):
-              yield _ping_pong_scenario(
-                  'cpp_protobuf_%s_%s_qps_unconstrained_%smps_%s' % (synchronicity, rpc_type, mps, secstr),
-                  rpc_type=rpc_type.upper(),
-                  client_type='%s_CLIENT' % synchronicity.upper(),
-                  server_type='%s_SERVER' % synchronicity.upper(),
-                  unconstrained_client=synchronicity,
-                  secure=secure, messages_per_stream=mps,
-                  minimal_stack=not secure,
-                  categories=smoketest_categories+[SCALABLE])
+                yield _ping_pong_scenario(
+                    'cpp_generic_async_streaming_qps_unconstrained_%smps_%s' %
+                    (mps, secstr),
+                    rpc_type='STREAMING',
+                    client_type='ASYNC_CLIENT',
+                    server_type='ASYNC_GENERIC_SERVER',
+                    unconstrained_client='async',
+                    use_generic_payload=True,
+                    secure=secure,
+                    messages_per_stream=mps,
+                    minimal_stack=not secure,
+                    categories=smoketest_categories + [SCALABLE])
 
             for mps in geometric_progression(1, 200, math.sqrt(10)):
-              yield _ping_pong_scenario(
-                  'cpp_protobuf_%s_%s_qps_unconstrained_%smps_%s' % (synchronicity, rpc_type, mps, secstr),
-                  rpc_type=rpc_type.upper(),
-                  client_type='%s_CLIENT' % synchronicity.upper(),
-                  server_type='%s_SERVER' % synchronicity.upper(),
-                  unconstrained_client=synchronicity,
-                  secure=secure, messages_per_stream=mps,
-                  minimal_stack=not secure,
-                  categories=[SWEEP])
-
-          for channels in geometric_progression(1, 20000, math.sqrt(10)):
-            for outstanding in geometric_progression(1, 200000, math.sqrt(10)):
-                if synchronicity == 'sync' and outstanding > 1200: continue
-                if outstanding < channels: continue
                 yield _ping_pong_scenario(
-                    'cpp_protobuf_%s_%s_qps_unconstrained_%s_%d_channels_%d_outstanding' % (synchronicity, rpc_type, secstr, channels, outstanding),
-                    rpc_type=rpc_type.upper(),
-                    client_type='%s_CLIENT' % synchronicity.upper(),
-                    server_type='%s_SERVER' % synchronicity.upper(),
-                    unconstrained_client=synchronicity, secure=secure,
+                    'cpp_generic_async_streaming_qps_unconstrained_%smps_%s' %
+                    (mps, secstr),
+                    rpc_type='STREAMING',
+                    client_type='ASYNC_CLIENT',
+                    server_type='ASYNC_GENERIC_SERVER',
+                    unconstrained_client='async',
+                    use_generic_payload=True,
+                    secure=secure,
+                    messages_per_stream=mps,
                     minimal_stack=not secure,
-                    categories=[SWEEP], channels=channels, outstanding=outstanding)
-
-  def __str__(self):
-    return 'c++'
+                    categories=[SWEEP])
+
+            yield _ping_pong_scenario(
+                'cpp_generic_async_streaming_qps_1channel_1MBmsg_%s' % secstr,
+                rpc_type='STREAMING',
+                req_size=1024 * 1024,
+                resp_size=1024 * 1024,
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_GENERIC_SERVER',
+                unconstrained_client='async',
+                use_generic_payload=True,
+                secure=secure,
+                minimal_stack=not secure,
+                categories=smoketest_categories + [SCALABLE],
+                channels=1,
+                outstanding=100)
+
+            yield _ping_pong_scenario(
+                'cpp_generic_async_streaming_qps_unconstrained_64KBmsg_%s' %
+                secstr,
+                rpc_type='STREAMING',
+                req_size=64 * 1024,
+                resp_size=64 * 1024,
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_GENERIC_SERVER',
+                unconstrained_client='async',
+                use_generic_payload=True,
+                secure=secure,
+                minimal_stack=not secure,
+                categories=smoketest_categories + [SCALABLE])
+
+            # TODO(https://github.com/grpc/grpc/issues/11500) Re-enable this test
+            #yield _ping_pong_scenario(
+            #    'cpp_generic_async_streaming_qps_unconstrained_1cq_%s' % secstr,
+            #    rpc_type='STREAMING',
+            #    client_type='ASYNC_CLIENT',
+            #    server_type='ASYNC_GENERIC_SERVER',
+            #    unconstrained_client='async-limited', use_generic_payload=True,
+            #    secure=secure,
+            #    client_threads_per_cq=1000000, server_threads_per_cq=1000000,
+            #    categories=smoketest_categories+[SCALABLE])
+
+            yield _ping_pong_scenario(
+                'cpp_generic_async_streaming_qps_unconstrained_2waysharedcq_%s'
+                % secstr,
+                rpc_type='STREAMING',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_GENERIC_SERVER',
+                unconstrained_client='async',
+                use_generic_payload=True,
+                secure=secure,
+                client_threads_per_cq=2,
+                server_threads_per_cq=2,
+                categories=smoketest_categories + [SCALABLE])
+
+            #yield _ping_pong_scenario(
+            #    'cpp_protobuf_async_streaming_qps_unconstrained_1cq_%s' % secstr,
+            #    rpc_type='STREAMING',
+            #    client_type='ASYNC_CLIENT',
+            #    server_type='ASYNC_SERVER',
+            #    unconstrained_client='async-limited',
+            #    secure=secure,
+            #    client_threads_per_cq=1000000, server_threads_per_cq=1000000,
+            #    categories=smoketest_categories+[SCALABLE])
+
+            yield _ping_pong_scenario(
+                'cpp_protobuf_async_streaming_qps_unconstrained_2waysharedcq_%s'
+                % secstr,
+                rpc_type='STREAMING',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_SERVER',
+                unconstrained_client='async',
+                secure=secure,
+                client_threads_per_cq=2,
+                server_threads_per_cq=2,
+                categories=smoketest_categories + [SCALABLE])
+
+            #yield _ping_pong_scenario(
+            #    'cpp_protobuf_async_unary_qps_unconstrained_1cq_%s' % secstr,
+            #    rpc_type='UNARY',
+            #    client_type='ASYNC_CLIENT',
+            #    server_type='ASYNC_SERVER',
+            #    unconstrained_client='async-limited',
+            #    secure=secure,
+            #    client_threads_per_cq=1000000, server_threads_per_cq=1000000,
+            #    categories=smoketest_categories+[SCALABLE])
+
+            yield _ping_pong_scenario(
+                'cpp_protobuf_async_unary_qps_unconstrained_2waysharedcq_%s' %
+                secstr,
+                rpc_type='UNARY',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_SERVER',
+                unconstrained_client='async',
+                secure=secure,
+                client_threads_per_cq=2,
+                server_threads_per_cq=2,
+                categories=smoketest_categories + [SCALABLE])
+
+            yield _ping_pong_scenario(
+                'cpp_generic_async_streaming_qps_one_server_core_%s' % secstr,
+                rpc_type='STREAMING',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_GENERIC_SERVER',
+                unconstrained_client='async-limited',
+                use_generic_payload=True,
+                async_server_threads=1,
+                minimal_stack=not secure,
+                secure=secure)
+
+            yield _ping_pong_scenario(
+                'cpp_protobuf_async_client_sync_server_unary_qps_unconstrained_%s'
+                % (secstr),
+                rpc_type='UNARY',
+                client_type='ASYNC_CLIENT',
+                server_type='SYNC_SERVER',
+                unconstrained_client='async',
+                secure=secure,
+                minimal_stack=not secure,
+                categories=smoketest_categories + [SCALABLE],
+                excluded_poll_engines=['poll-cv'])
+
+            yield _ping_pong_scenario(
+                'cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_%s'
+                % (secstr),
+                rpc_type='UNARY',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_SERVER',
+                channels=1,
+                outstanding=64,
+                req_size=128,
+                resp_size=8 * 1024 * 1024,
+                secure=secure,
+                minimal_stack=not secure,
+                categories=smoketest_categories + [SCALABLE])
+
+            yield _ping_pong_scenario(
+                'cpp_protobuf_async_client_sync_server_streaming_qps_unconstrained_%s'
+                % secstr,
+                rpc_type='STREAMING',
+                client_type='ASYNC_CLIENT',
+                server_type='SYNC_SERVER',
+                unconstrained_client='async',
+                secure=secure,
+                minimal_stack=not secure,
+                categories=smoketest_categories + [SCALABLE],
+                excluded_poll_engines=['poll-cv'])
+
+            yield _ping_pong_scenario(
+                'cpp_protobuf_async_unary_ping_pong_%s_1MB' % secstr,
+                rpc_type='UNARY',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_SERVER',
+                req_size=1024 * 1024,
+                resp_size=1024 * 1024,
+                secure=secure,
+                minimal_stack=not secure,
+                categories=smoketest_categories + [SCALABLE])
+
+            for rpc_type in [
+                    'unary', 'streaming', 'streaming_from_client',
+                    'streaming_from_server'
+            ]:
+                for synchronicity in ['sync', 'async']:
+                    yield _ping_pong_scenario(
+                        'cpp_protobuf_%s_%s_ping_pong_%s' %
+                        (synchronicity, rpc_type, secstr),
+                        rpc_type=rpc_type.upper(),
+                        client_type='%s_CLIENT' % synchronicity.upper(),
+                        server_type='%s_SERVER' % synchronicity.upper(),
+                        async_server_threads=1,
+                        minimal_stack=not secure,
+                        secure=secure)
+
+                    for size in geometric_progression(1, 1024 * 1024 * 1024 + 1,
+                                                      8):
+                        yield _ping_pong_scenario(
+                            'cpp_protobuf_%s_%s_qps_unconstrained_%s_%db' %
+                            (synchronicity, rpc_type, secstr, size),
+                            rpc_type=rpc_type.upper(),
+                            req_size=size,
+                            resp_size=size,
+                            client_type='%s_CLIENT' % synchronicity.upper(),
+                            server_type='%s_SERVER' % synchronicity.upper(),
+                            unconstrained_client=synchronicity,
+                            secure=secure,
+                            minimal_stack=not secure,
+                            categories=[SWEEP])
+
+                    yield _ping_pong_scenario(
+                        'cpp_protobuf_%s_%s_qps_unconstrained_%s' %
+                        (synchronicity, rpc_type, secstr),
+                        rpc_type=rpc_type.upper(),
+                        client_type='%s_CLIENT' % synchronicity.upper(),
+                        server_type='%s_SERVER' % synchronicity.upper(),
+                        unconstrained_client=synchronicity,
+                        secure=secure,
+                        minimal_stack=not secure,
+                        server_threads_per_cq=3,
+                        client_threads_per_cq=3,
+                        categories=smoketest_categories + [SCALABLE])
+
+                    # TODO(vjpai): Re-enable this test. It has a lot of timeouts
+                    # and hasn't yet been conclusively identified as a test failure
+                    # or race in the library
+                    # yield _ping_pong_scenario(
+                    #     'cpp_protobuf_%s_%s_qps_unconstrained_%s_500kib_resource_quota' % (synchronicity, rpc_type, secstr),
+                    #     rpc_type=rpc_type.upper(),
+                    #     client_type='%s_CLIENT' % synchronicity.upper(),
+                    #     server_type='%s_SERVER' % synchronicity.upper(),
+                    #     unconstrained_client=synchronicity,
+                    #     secure=secure,
+                    #     categories=smoketest_categories+[SCALABLE],
+                    #     resource_quota_size=500*1024)
+
+                    if rpc_type == 'streaming':
+                        for mps in geometric_progression(1, 20, 10):
+                            yield _ping_pong_scenario(
+                                'cpp_protobuf_%s_%s_qps_unconstrained_%smps_%s'
+                                % (synchronicity, rpc_type, mps, secstr),
+                                rpc_type=rpc_type.upper(),
+                                client_type='%s_CLIENT' % synchronicity.upper(),
+                                server_type='%s_SERVER' % synchronicity.upper(),
+                                unconstrained_client=synchronicity,
+                                secure=secure,
+                                messages_per_stream=mps,
+                                minimal_stack=not secure,
+                                categories=smoketest_categories + [SCALABLE])
+
+                        for mps in geometric_progression(1, 200, math.sqrt(10)):
+                            yield _ping_pong_scenario(
+                                'cpp_protobuf_%s_%s_qps_unconstrained_%smps_%s'
+                                % (synchronicity, rpc_type, mps, secstr),
+                                rpc_type=rpc_type.upper(),
+                                client_type='%s_CLIENT' % synchronicity.upper(),
+                                server_type='%s_SERVER' % synchronicity.upper(),
+                                unconstrained_client=synchronicity,
+                                secure=secure,
+                                messages_per_stream=mps,
+                                minimal_stack=not secure,
+                                categories=[SWEEP])
+
+                    for channels in geometric_progression(1, 20000,
+                                                          math.sqrt(10)):
+                        for outstanding in geometric_progression(1, 200000,
+                                                                 math.sqrt(10)):
+                            if synchronicity == 'sync' and outstanding > 1200:
+                                continue
+                            if outstanding < channels: continue
+                            yield _ping_pong_scenario(
+                                'cpp_protobuf_%s_%s_qps_unconstrained_%s_%d_channels_%d_outstanding'
+                                % (synchronicity, rpc_type, secstr, channels,
+                                   outstanding),
+                                rpc_type=rpc_type.upper(),
+                                client_type='%s_CLIENT' % synchronicity.upper(),
+                                server_type='%s_SERVER' % synchronicity.upper(),
+                                unconstrained_client=synchronicity,
+                                secure=secure,
+                                minimal_stack=not secure,
+                                categories=[SWEEP],
+                                channels=channels,
+                                outstanding=outstanding)
+
+    def __str__(self):
+        return 'c++'
 
 
 class CSharpLanguage:
 
-  def __init__(self):
-    self.safename = str(self)
-
-  def worker_cmdline(self):
-    return ['tools/run_tests/performance/run_worker_csharp.sh']
-
-  def worker_port_offset(self):
-    return 100
-
-  def scenarios(self):
-    yield _ping_pong_scenario(
-        'csharp_generic_async_streaming_ping_pong', rpc_type='STREAMING',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
-        use_generic_payload=True,
-        categories=[SMOKETEST, SCALABLE])
-
-    yield _ping_pong_scenario(
-        'csharp_generic_async_streaming_ping_pong_insecure_1MB', rpc_type='STREAMING',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
-        req_size=1024*1024, resp_size=1024*1024,
-        use_generic_payload=True,
-        secure=False,
-        categories=[SMOKETEST, SCALABLE])
-
-    yield _ping_pong_scenario(
-        'csharp_generic_async_streaming_qps_unconstrained_insecure', rpc_type='STREAMING',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
-        unconstrained_client='async', use_generic_payload=True,
-        secure=False,
-        categories=[SMOKETEST, SCALABLE])
-
-    yield _ping_pong_scenario(
-        'csharp_protobuf_async_streaming_ping_pong', rpc_type='STREAMING',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER')
-
-    yield _ping_pong_scenario(
-        'csharp_protobuf_async_unary_ping_pong', rpc_type='UNARY',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-        categories=[SMOKETEST, SCALABLE])
-
-    yield _ping_pong_scenario(
-        'csharp_protobuf_sync_to_async_unary_ping_pong', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER')
-
-    yield _ping_pong_scenario(
-        'csharp_protobuf_async_unary_qps_unconstrained', rpc_type='UNARY',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-        unconstrained_client='async',
-        categories=[SMOKETEST,SCALABLE])
-
-    yield _ping_pong_scenario(
-        'csharp_protobuf_async_streaming_qps_unconstrained', rpc_type='STREAMING',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-        unconstrained_client='async',
-        categories=[SCALABLE])
-
-    yield _ping_pong_scenario(
-        'csharp_to_cpp_protobuf_sync_unary_ping_pong', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-        server_language='c++', async_server_threads=1,
-        categories=[SMOKETEST, SCALABLE])
-
-    yield _ping_pong_scenario(
-        'csharp_to_cpp_protobuf_async_streaming_ping_pong', rpc_type='STREAMING',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-        server_language='c++', async_server_threads=1)
-
-    yield _ping_pong_scenario(
-        'csharp_to_cpp_protobuf_async_unary_qps_unconstrained', rpc_type='UNARY',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-        unconstrained_client='async', server_language='c++',
-        categories=[SCALABLE])
-
-    yield _ping_pong_scenario(
-        'csharp_to_cpp_protobuf_sync_to_async_unary_qps_unconstrained', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
-        unconstrained_client='sync', server_language='c++',
-        categories=[SCALABLE])
-
-    yield _ping_pong_scenario(
-        'cpp_to_csharp_protobuf_async_unary_qps_unconstrained', rpc_type='UNARY',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-        unconstrained_client='async', client_language='c++',
-        categories=[SCALABLE])
-
-    yield _ping_pong_scenario(
-        'csharp_protobuf_async_unary_ping_pong_1MB', rpc_type='UNARY',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-        req_size=1024*1024, resp_size=1024*1024,
-        categories=[SMOKETEST, SCALABLE])
-
-  def __str__(self):
-    return 'csharp'
+    def __init__(self):
+        self.safename = str(self)
+
+    def worker_cmdline(self):
+        return ['tools/run_tests/performance/run_worker_csharp.sh']
+
+    def worker_port_offset(self):
+        return 100
+
+    def scenarios(self):
+        yield _ping_pong_scenario(
+            'csharp_generic_async_streaming_ping_pong',
+            rpc_type='STREAMING',
+            client_type='ASYNC_CLIENT',
+            server_type='ASYNC_GENERIC_SERVER',
+            use_generic_payload=True,
+            categories=[SMOKETEST, SCALABLE])
+
+        yield _ping_pong_scenario(
+            'csharp_generic_async_streaming_ping_pong_insecure_1MB',
+            rpc_type='STREAMING',
+            client_type='ASYNC_CLIENT',
+            server_type='ASYNC_GENERIC_SERVER',
+            req_size=1024 * 1024,
+            resp_size=1024 * 1024,
+            use_generic_payload=True,
+            secure=False,
+            categories=[SMOKETEST, SCALABLE])
+
+        yield _ping_pong_scenario(
+            'csharp_generic_async_streaming_qps_unconstrained_insecure',
+            rpc_type='STREAMING',
+            client_type='ASYNC_CLIENT',
+            server_type='ASYNC_GENERIC_SERVER',
+            unconstrained_client='async',
+            use_generic_payload=True,
+            secure=False,
+            categories=[SMOKETEST, SCALABLE])
+
+        yield _ping_pong_scenario(
+            'csharp_protobuf_async_streaming_ping_pong',
+            rpc_type='STREAMING',
+            client_type='ASYNC_CLIENT',
+            server_type='ASYNC_SERVER')
+
+        yield _ping_pong_scenario(
+            'csharp_protobuf_async_unary_ping_pong',
+            rpc_type='UNARY',
+            client_type='ASYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            categories=[SMOKETEST, SCALABLE])
+
+        yield _ping_pong_scenario(
+            'csharp_protobuf_sync_to_async_unary_ping_pong',
+            rpc_type='UNARY',
+            client_type='SYNC_CLIENT',
+            server_type='ASYNC_SERVER')
+
+        yield _ping_pong_scenario(
+            'csharp_protobuf_async_unary_qps_unconstrained',
+            rpc_type='UNARY',
+            client_type='ASYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            unconstrained_client='async',
+            categories=[SMOKETEST, SCALABLE])
+
+        yield _ping_pong_scenario(
+            'csharp_protobuf_async_streaming_qps_unconstrained',
+            rpc_type='STREAMING',
+            client_type='ASYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            unconstrained_client='async',
+            categories=[SCALABLE])
+
+        yield _ping_pong_scenario(
+            'csharp_to_cpp_protobuf_sync_unary_ping_pong',
+            rpc_type='UNARY',
+            client_type='SYNC_CLIENT',
+            server_type='SYNC_SERVER',
+            server_language='c++',
+            async_server_threads=1,
+            categories=[SMOKETEST, SCALABLE])
+
+        yield _ping_pong_scenario(
+            'csharp_to_cpp_protobuf_async_streaming_ping_pong',
+            rpc_type='STREAMING',
+            client_type='ASYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            server_language='c++',
+            async_server_threads=1)
+
+        yield _ping_pong_scenario(
+            'csharp_to_cpp_protobuf_async_unary_qps_unconstrained',
+            rpc_type='UNARY',
+            client_type='ASYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            unconstrained_client='async',
+            server_language='c++',
+            categories=[SCALABLE])
+
+        yield _ping_pong_scenario(
+            'csharp_to_cpp_protobuf_sync_to_async_unary_qps_unconstrained',
+            rpc_type='UNARY',
+            client_type='SYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            unconstrained_client='sync',
+            server_language='c++',
+            categories=[SCALABLE])
+
+        yield _ping_pong_scenario(
+            'cpp_to_csharp_protobuf_async_unary_qps_unconstrained',
+            rpc_type='UNARY',
+            client_type='ASYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            unconstrained_client='async',
+            client_language='c++',
+            categories=[SCALABLE])
+
+        yield _ping_pong_scenario(
+            'csharp_protobuf_async_unary_ping_pong_1MB',
+            rpc_type='UNARY',
+            client_type='ASYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            req_size=1024 * 1024,
+            resp_size=1024 * 1024,
+            categories=[SMOKETEST, SCALABLE])
+
+    def __str__(self):
+        return 'csharp'
+
 
 class PythonLanguage:
 
-  def __init__(self):
-    self.safename = 'python'
-
-  def worker_cmdline(self):
-    return ['tools/run_tests/performance/run_worker_python.sh']
-
-  def worker_port_offset(self):
-    return 500
-
-  def scenarios(self):
-    yield _ping_pong_scenario(
-        'python_generic_sync_streaming_ping_pong', rpc_type='STREAMING',
-        client_type='SYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
-        use_generic_payload=True,
-        categories=[SMOKETEST, SCALABLE])
-
-    yield _ping_pong_scenario(
-        'python_protobuf_sync_streaming_ping_pong', rpc_type='STREAMING',
-        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER')
-
-    yield _ping_pong_scenario(
-        'python_protobuf_async_unary_ping_pong', rpc_type='UNARY',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER')
-
-    yield _ping_pong_scenario(
-        'python_protobuf_sync_unary_ping_pong', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
-        categories=[SMOKETEST, SCALABLE])
-
-    yield _ping_pong_scenario(
-        'python_protobuf_sync_unary_qps_unconstrained', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
-        unconstrained_client='sync')
-
-    yield _ping_pong_scenario(
-        'python_protobuf_sync_streaming_qps_unconstrained', rpc_type='STREAMING',
-        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
-        unconstrained_client='sync')
-
-    yield _ping_pong_scenario(
-        'python_to_cpp_protobuf_sync_unary_ping_pong', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
-        server_language='c++', async_server_threads=1,
-        categories=[SMOKETEST, SCALABLE])
-
-    yield _ping_pong_scenario(
-        'python_to_cpp_protobuf_sync_streaming_ping_pong', rpc_type='STREAMING',
-        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
-        server_language='c++', async_server_threads=1)
-
-    yield _ping_pong_scenario(
-        'python_protobuf_sync_unary_ping_pong_1MB', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
-        req_size=1024*1024, resp_size=1024*1024,
-        categories=[SMOKETEST, SCALABLE])
-
-  def __str__(self):
-    return 'python'
+    def __init__(self):
+        self.safename = 'python'
+
+    def worker_cmdline(self):
+        return ['tools/run_tests/performance/run_worker_python.sh']
+
+    def worker_port_offset(self):
+        return 500
+
+    def scenarios(self):
+        yield _ping_pong_scenario(
+            'python_generic_sync_streaming_ping_pong',
+            rpc_type='STREAMING',
+            client_type='SYNC_CLIENT',
+            server_type='ASYNC_GENERIC_SERVER',
+            use_generic_payload=True,
+            categories=[SMOKETEST, SCALABLE])
+
+        yield _ping_pong_scenario(
+            'python_protobuf_sync_streaming_ping_pong',
+            rpc_type='STREAMING',
+            client_type='SYNC_CLIENT',
+            server_type='ASYNC_SERVER')
+
+        yield _ping_pong_scenario(
+            'python_protobuf_async_unary_ping_pong',
+            rpc_type='UNARY',
+            client_type='ASYNC_CLIENT',
+            server_type='ASYNC_SERVER')
+
+        yield _ping_pong_scenario(
+            'python_protobuf_sync_unary_ping_pong',
+            rpc_type='UNARY',
+            client_type='SYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            categories=[SMOKETEST, SCALABLE])
+
+        yield _ping_pong_scenario(
+            'python_protobuf_sync_unary_qps_unconstrained',
+            rpc_type='UNARY',
+            client_type='SYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            unconstrained_client='sync')
+
+        yield _ping_pong_scenario(
+            'python_protobuf_sync_streaming_qps_unconstrained',
+            rpc_type='STREAMING',
+            client_type='SYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            unconstrained_client='sync')
+
+        yield _ping_pong_scenario(
+            'python_to_cpp_protobuf_sync_unary_ping_pong',
+            rpc_type='UNARY',
+            client_type='SYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            server_language='c++',
+            async_server_threads=1,
+            categories=[SMOKETEST, SCALABLE])
+
+        yield _ping_pong_scenario(
+            'python_to_cpp_protobuf_sync_streaming_ping_pong',
+            rpc_type='STREAMING',
+            client_type='SYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            server_language='c++',
+            async_server_threads=1)
+
+        yield _ping_pong_scenario(
+            'python_protobuf_sync_unary_ping_pong_1MB',
+            rpc_type='UNARY',
+            client_type='SYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            req_size=1024 * 1024,
+            resp_size=1024 * 1024,
+            categories=[SMOKETEST, SCALABLE])
+
+    def __str__(self):
+        return 'python'
+
 
 class RubyLanguage:
 
-  def __init__(self):
-    pass
-    self.safename = str(self)
+    def __init__(self):
+        pass
+        self.safename = str(self)
 
-  def worker_cmdline(self):
-    return ['tools/run_tests/performance/run_worker_ruby.sh']
+    def worker_cmdline(self):
+        return ['tools/run_tests/performance/run_worker_ruby.sh']
 
-  def worker_port_offset(self):
-    return 300
+    def worker_port_offset(self):
+        return 300
 
-  def scenarios(self):
-    yield _ping_pong_scenario(
-        'ruby_protobuf_sync_streaming_ping_pong', rpc_type='STREAMING',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-        categories=[SMOKETEST, SCALABLE])
+    def scenarios(self):
+        yield _ping_pong_scenario(
+            'ruby_protobuf_sync_streaming_ping_pong',
+            rpc_type='STREAMING',
+            client_type='SYNC_CLIENT',
+            server_type='SYNC_SERVER',
+            categories=[SMOKETEST, SCALABLE])
 
-    yield _ping_pong_scenario(
-        'ruby_protobuf_unary_ping_pong', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-        categories=[SMOKETEST, SCALABLE])
+        yield _ping_pong_scenario(
+            'ruby_protobuf_unary_ping_pong',
+            rpc_type='UNARY',
+            client_type='SYNC_CLIENT',
+            server_type='SYNC_SERVER',
+            categories=[SMOKETEST, SCALABLE])
 
-    yield _ping_pong_scenario(
-        'ruby_protobuf_sync_unary_qps_unconstrained', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-        unconstrained_client='sync')
+        yield _ping_pong_scenario(
+            'ruby_protobuf_sync_unary_qps_unconstrained',
+            rpc_type='UNARY',
+            client_type='SYNC_CLIENT',
+            server_type='SYNC_SERVER',
+            unconstrained_client='sync')
 
-    yield _ping_pong_scenario(
-        'ruby_protobuf_sync_streaming_qps_unconstrained', rpc_type='STREAMING',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-        unconstrained_client='sync')
+        yield _ping_pong_scenario(
+            'ruby_protobuf_sync_streaming_qps_unconstrained',
+            rpc_type='STREAMING',
+            client_type='SYNC_CLIENT',
+            server_type='SYNC_SERVER',
+            unconstrained_client='sync')
 
-    yield _ping_pong_scenario(
-        'ruby_to_cpp_protobuf_sync_unary_ping_pong', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-        server_language='c++', async_server_threads=1)
+        yield _ping_pong_scenario(
+            'ruby_to_cpp_protobuf_sync_unary_ping_pong',
+            rpc_type='UNARY',
+            client_type='SYNC_CLIENT',
+            server_type='SYNC_SERVER',
+            server_language='c++',
+            async_server_threads=1)
 
-    yield _ping_pong_scenario(
-        'ruby_to_cpp_protobuf_sync_streaming_ping_pong', rpc_type='STREAMING',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-        server_language='c++', async_server_threads=1)
+        yield _ping_pong_scenario(
+            'ruby_to_cpp_protobuf_sync_streaming_ping_pong',
+            rpc_type='STREAMING',
+            client_type='SYNC_CLIENT',
+            server_type='SYNC_SERVER',
+            server_language='c++',
+            async_server_threads=1)
 
-    yield _ping_pong_scenario(
-        'ruby_protobuf_unary_ping_pong_1MB', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-        req_size=1024*1024, resp_size=1024*1024,
-        categories=[SMOKETEST, SCALABLE])
+        yield _ping_pong_scenario(
+            'ruby_protobuf_unary_ping_pong_1MB',
+            rpc_type='UNARY',
+            client_type='SYNC_CLIENT',
+            server_type='SYNC_SERVER',
+            req_size=1024 * 1024,
+            resp_size=1024 * 1024,
+            categories=[SMOKETEST, SCALABLE])
 
-  def __str__(self):
-    return 'ruby'
+    def __str__(self):
+        return 'ruby'
 
 
 class Php7Language:
 
-  def __init__(self, php7_protobuf_c=False):
-    pass
-    self.php7_protobuf_c=php7_protobuf_c
-    self.safename = str(self)
-
-  def worker_cmdline(self):
-    if self.php7_protobuf_c:
-        return ['tools/run_tests/performance/run_worker_php.sh', '--use_protobuf_c_extension']
-    return ['tools/run_tests/performance/run_worker_php.sh']
-
-  def worker_port_offset(self):
-    if self.php7_protobuf_c:
-        return 900
-    return 800
-
-  def scenarios(self):
-    php7_extension_mode='php7_protobuf_php_extension'
-    if self.php7_protobuf_c:
-        php7_extension_mode='php7_protobuf_c_extension'
-
-    yield _ping_pong_scenario(
-        '%s_to_cpp_protobuf_sync_unary_ping_pong' % php7_extension_mode,
-        rpc_type='UNARY', client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-        server_language='c++', async_server_threads=1)
-
-    yield _ping_pong_scenario(
-        '%s_to_cpp_protobuf_sync_streaming_ping_pong' % php7_extension_mode,
-        rpc_type='STREAMING', client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-        server_language='c++', async_server_threads=1)
-
-    # TODO(ddyihai): Investigate why when async_server_threads=1/CPU usage 340%, the QPS performs
-    # better than async_server_threads=0/CPU usage 490%.
-    yield _ping_pong_scenario(
-        '%s_to_cpp_protobuf_sync_unary_qps_unconstrained' % php7_extension_mode,
-        rpc_type='UNARY', client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
-        server_language='c++', outstanding=1, async_server_threads=1, unconstrained_client='sync')
-
-    yield _ping_pong_scenario(
-        '%s_to_cpp_protobuf_sync_streaming_qps_unconstrained' % php7_extension_mode,
-        rpc_type='STREAMING', client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
-        server_language='c++', outstanding=1, async_server_threads=1, unconstrained_client='sync')
-
-  def __str__(self):
-    if self.php7_protobuf_c:
-        return 'php7_protobuf_c'
-    return 'php7'
+    def __init__(self, php7_protobuf_c=False):
+        pass
+        self.php7_protobuf_c = php7_protobuf_c
+        self.safename = str(self)
+
+    def worker_cmdline(self):
+        if self.php7_protobuf_c:
+            return [
+                'tools/run_tests/performance/run_worker_php.sh',
+                '--use_protobuf_c_extension'
+            ]
+        return ['tools/run_tests/performance/run_worker_php.sh']
+
+    def worker_port_offset(self):
+        if self.php7_protobuf_c:
+            return 900
+        return 800
+
+    def scenarios(self):
+        php7_extension_mode = 'php7_protobuf_php_extension'
+        if self.php7_protobuf_c:
+            php7_extension_mode = 'php7_protobuf_c_extension'
+
+        yield _ping_pong_scenario(
+            '%s_to_cpp_protobuf_sync_unary_ping_pong' % php7_extension_mode,
+            rpc_type='UNARY',
+            client_type='SYNC_CLIENT',
+            server_type='SYNC_SERVER',
+            server_language='c++',
+            async_server_threads=1)
+
+        yield _ping_pong_scenario(
+            '%s_to_cpp_protobuf_sync_streaming_ping_pong' % php7_extension_mode,
+            rpc_type='STREAMING',
+            client_type='SYNC_CLIENT',
+            server_type='SYNC_SERVER',
+            server_language='c++',
+            async_server_threads=1)
+
+        # TODO(ddyihai): Investigate why when async_server_threads=1/CPU usage 340%, the QPS performs
+        # better than async_server_threads=0/CPU usage 490%.
+        yield _ping_pong_scenario(
+            '%s_to_cpp_protobuf_sync_unary_qps_unconstrained' %
+            php7_extension_mode,
+            rpc_type='UNARY',
+            client_type='SYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            server_language='c++',
+            outstanding=1,
+            async_server_threads=1,
+            unconstrained_client='sync')
+
+        yield _ping_pong_scenario(
+            '%s_to_cpp_protobuf_sync_streaming_qps_unconstrained' %
+            php7_extension_mode,
+            rpc_type='STREAMING',
+            client_type='SYNC_CLIENT',
+            server_type='ASYNC_SERVER',
+            server_language='c++',
+            outstanding=1,
+            async_server_threads=1,
+            unconstrained_client='sync')
+
+    def __str__(self):
+        if self.php7_protobuf_c:
+            return 'php7_protobuf_c'
+        return 'php7'
+
 
 class JavaLanguage:
 
-  def __init__(self):
-    pass
-    self.safename = str(self)
-
-  def worker_cmdline(self):
-    return ['tools/run_tests/performance/run_worker_java.sh']
-
-  def worker_port_offset(self):
-    return 400
-
-  def scenarios(self):
-    for secure in [True, False]:
-      secstr = 'secure' if secure else 'insecure'
-      smoketest_categories = ([SMOKETEST] if secure else []) + [SCALABLE]
-
-      yield _ping_pong_scenario(
-          'java_generic_async_streaming_ping_pong_%s' % secstr, rpc_type='STREAMING',
-          client_type='ASYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
-          use_generic_payload=True, async_server_threads=1,
-          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS,
-          categories=smoketest_categories)
-
-      yield _ping_pong_scenario(
-          'java_protobuf_async_streaming_ping_pong_%s' % secstr, rpc_type='STREAMING',
-          client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-          async_server_threads=1,
-          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS)
-
-      yield _ping_pong_scenario(
-          'java_protobuf_async_unary_ping_pong_%s' % secstr, rpc_type='UNARY',
-          client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-          async_server_threads=1,
-          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS,
-          categories=smoketest_categories)
-
-      yield _ping_pong_scenario(
-          'java_protobuf_unary_ping_pong_%s' % secstr, rpc_type='UNARY',
-          client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-          async_server_threads=1,
-          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS)
-
-      yield _ping_pong_scenario(
-          'java_protobuf_async_unary_qps_unconstrained_%s' % secstr, rpc_type='UNARY',
-          client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-          unconstrained_client='async',
-          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS,
-          categories=smoketest_categories+[SCALABLE])
-
-      yield _ping_pong_scenario(
-          'java_protobuf_async_streaming_qps_unconstrained_%s' % secstr, rpc_type='STREAMING',
-          client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-          unconstrained_client='async',
-          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS,
-          categories=[SCALABLE])
-
-      yield _ping_pong_scenario(
-          'java_generic_async_streaming_qps_unconstrained_%s' % secstr, rpc_type='STREAMING',
-          client_type='ASYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
-          unconstrained_client='async', use_generic_payload=True,
-          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS,
-          categories=[SCALABLE])
-
-      yield _ping_pong_scenario(
-          'java_generic_async_streaming_qps_one_server_core_%s' % secstr, rpc_type='STREAMING',
-          client_type='ASYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
-          unconstrained_client='async-limited', use_generic_payload=True,
-          async_server_threads=1,
-          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS)
-
-      # TODO(jtattermusch): add scenarios java vs C++
-
-  def __str__(self):
-    return 'java'
+    def __init__(self):
+        pass
+        self.safename = str(self)
+
+    def worker_cmdline(self):
+        return ['tools/run_tests/performance/run_worker_java.sh']
+
+    def worker_port_offset(self):
+        return 400
+
+    def scenarios(self):
+        for secure in [True, False]:
+            secstr = 'secure' if secure else 'insecure'
+            smoketest_categories = ([SMOKETEST] if secure else []) + [SCALABLE]
+
+            yield _ping_pong_scenario(
+                'java_generic_async_streaming_ping_pong_%s' % secstr,
+                rpc_type='STREAMING',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_GENERIC_SERVER',
+                use_generic_payload=True,
+                async_server_threads=1,
+                secure=secure,
+                warmup_seconds=JAVA_WARMUP_SECONDS,
+                categories=smoketest_categories)
+
+            yield _ping_pong_scenario(
+                'java_protobuf_async_streaming_ping_pong_%s' % secstr,
+                rpc_type='STREAMING',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_SERVER',
+                async_server_threads=1,
+                secure=secure,
+                warmup_seconds=JAVA_WARMUP_SECONDS)
+
+            yield _ping_pong_scenario(
+                'java_protobuf_async_unary_ping_pong_%s' % secstr,
+                rpc_type='UNARY',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_SERVER',
+                async_server_threads=1,
+                secure=secure,
+                warmup_seconds=JAVA_WARMUP_SECONDS,
+                categories=smoketest_categories)
+
+            yield _ping_pong_scenario(
+                'java_protobuf_unary_ping_pong_%s' % secstr,
+                rpc_type='UNARY',
+                client_type='SYNC_CLIENT',
+                server_type='SYNC_SERVER',
+                async_server_threads=1,
+                secure=secure,
+                warmup_seconds=JAVA_WARMUP_SECONDS)
+
+            yield _ping_pong_scenario(
+                'java_protobuf_async_unary_qps_unconstrained_%s' % secstr,
+                rpc_type='UNARY',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_SERVER',
+                unconstrained_client='async',
+                secure=secure,
+                warmup_seconds=JAVA_WARMUP_SECONDS,
+                categories=smoketest_categories + [SCALABLE])
+
+            yield _ping_pong_scenario(
+                'java_protobuf_async_streaming_qps_unconstrained_%s' % secstr,
+                rpc_type='STREAMING',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_SERVER',
+                unconstrained_client='async',
+                secure=secure,
+                warmup_seconds=JAVA_WARMUP_SECONDS,
+                categories=[SCALABLE])
+
+            yield _ping_pong_scenario(
+                'java_generic_async_streaming_qps_unconstrained_%s' % secstr,
+                rpc_type='STREAMING',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_GENERIC_SERVER',
+                unconstrained_client='async',
+                use_generic_payload=True,
+                secure=secure,
+                warmup_seconds=JAVA_WARMUP_SECONDS,
+                categories=[SCALABLE])
+
+            yield _ping_pong_scenario(
+                'java_generic_async_streaming_qps_one_server_core_%s' % secstr,
+                rpc_type='STREAMING',
+                client_type='ASYNC_CLIENT',
+                server_type='ASYNC_GENERIC_SERVER',
+                unconstrained_client='async-limited',
+                use_generic_payload=True,
+                async_server_threads=1,
+                secure=secure,
+                warmup_seconds=JAVA_WARMUP_SECONDS)
+
+            # TODO(jtattermusch): add scenarios java vs C++
+
+    def __str__(self):
+        return 'java'
 
 
 class GoLanguage:
 
-  def __init__(self):
-    pass
-    self.safename = str(self)
-
-  def worker_cmdline(self):
-    return ['tools/run_tests/performance/run_worker_go.sh']
-
-  def worker_port_offset(self):
-    return 600
-
-  def scenarios(self):
-    for secure in [True, False]:
-      secstr = 'secure' if secure else 'insecure'
-      smoketest_categories = ([SMOKETEST] if secure else []) + [SCALABLE]
-
-      # ASYNC_GENERIC_SERVER for Go actually uses a sync streaming server,
-      # but that's mostly because of lack of better name of the enum value.
-      yield _ping_pong_scenario(
-          'go_generic_sync_streaming_ping_pong_%s' % secstr, rpc_type='STREAMING',
-          client_type='SYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
-          use_generic_payload=True, async_server_threads=1,
-          secure=secure,
-          categories=smoketest_categories)
-
-      yield _ping_pong_scenario(
-          'go_protobuf_sync_streaming_ping_pong_%s' % secstr, rpc_type='STREAMING',
-          client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-          async_server_threads=1,
-          secure=secure)
-
-      yield _ping_pong_scenario(
-          'go_protobuf_sync_unary_ping_pong_%s' % secstr, rpc_type='UNARY',
-          client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-          async_server_threads=1,
-          secure=secure,
-          categories=smoketest_categories)
-
-      # unconstrained_client='async' is intended (client uses goroutines)
-      yield _ping_pong_scenario(
-          'go_protobuf_sync_unary_qps_unconstrained_%s' % secstr, rpc_type='UNARY',
-          client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-          unconstrained_client='async',
-          secure=secure,
-          categories=smoketest_categories+[SCALABLE])
-
-      # unconstrained_client='async' is intended (client uses goroutines)
-      yield _ping_pong_scenario(
-          'go_protobuf_sync_streaming_qps_unconstrained_%s' % secstr, rpc_type='STREAMING',
-          client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
-          unconstrained_client='async',
-          secure=secure,
-          categories=[SCALABLE])
-
-      # unconstrained_client='async' is intended (client uses goroutines)
-      # ASYNC_GENERIC_SERVER for Go actually uses a sync streaming server,
-      # but that's mostly because of lack of better name of the enum value.
-      yield _ping_pong_scenario(
-          'go_generic_sync_streaming_qps_unconstrained_%s' % secstr, rpc_type='STREAMING',
-          client_type='SYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
-          unconstrained_client='async', use_generic_payload=True,
-          secure=secure,
-          categories=[SCALABLE])
-
-      # TODO(jtattermusch): add scenarios go vs C++
-
-  def __str__(self):
-    return 'go'
+    def __init__(self):
+        pass
+        self.safename = str(self)
+
+    def worker_cmdline(self):
+        return ['tools/run_tests/performance/run_worker_go.sh']
+
+    def worker_port_offset(self):
+        return 600
+
+    def scenarios(self):
+        for secure in [True, False]:
+            secstr = 'secure' if secure else 'insecure'
+            smoketest_categories = ([SMOKETEST] if secure else []) + [SCALABLE]
+
+            # ASYNC_GENERIC_SERVER for Go actually uses a sync streaming server,
+            # but that's mostly because of lack of better name of the enum value.
+            yield _ping_pong_scenario(
+                'go_generic_sync_streaming_ping_pong_%s' % secstr,
+                rpc_type='STREAMING',
+                client_type='SYNC_CLIENT',
+                server_type='ASYNC_GENERIC_SERVER',
+                use_generic_payload=True,
+                async_server_threads=1,
+                secure=secure,
+                categories=smoketest_categories)
+
+            yield _ping_pong_scenario(
+                'go_protobuf_sync_streaming_ping_pong_%s' % secstr,
+                rpc_type='STREAMING',
+                client_type='SYNC_CLIENT',
+                server_type='SYNC_SERVER',
+                async_server_threads=1,
+                secure=secure)
+
+            yield _ping_pong_scenario(
+                'go_protobuf_sync_unary_ping_pong_%s' % secstr,
+                rpc_type='UNARY',
+                client_type='SYNC_CLIENT',
+                server_type='SYNC_SERVER',
+                async_server_threads=1,
+                secure=secure,
+                categories=smoketest_categories)
+
+            # unconstrained_client='async' is intended (client uses goroutines)
+            yield _ping_pong_scenario(
+                'go_protobuf_sync_unary_qps_unconstrained_%s' % secstr,
+                rpc_type='UNARY',
+                client_type='SYNC_CLIENT',
+                server_type='SYNC_SERVER',
+                unconstrained_client='async',
+                secure=secure,
+                categories=smoketest_categories + [SCALABLE])
+
+            # unconstrained_client='async' is intended (client uses goroutines)
+            yield _ping_pong_scenario(
+                'go_protobuf_sync_streaming_qps_unconstrained_%s' % secstr,
+                rpc_type='STREAMING',
+                client_type='SYNC_CLIENT',
+                server_type='SYNC_SERVER',
+                unconstrained_client='async',
+                secure=secure,
+                categories=[SCALABLE])
+
+            # unconstrained_client='async' is intended (client uses goroutines)
+            # ASYNC_GENERIC_SERVER for Go actually uses a sync streaming server,
+            # but that's mostly because of lack of better name of the enum value.
+            yield _ping_pong_scenario(
+                'go_generic_sync_streaming_qps_unconstrained_%s' % secstr,
+                rpc_type='STREAMING',
+                client_type='SYNC_CLIENT',
+                server_type='ASYNC_GENERIC_SERVER',
+                unconstrained_client='async',
+                use_generic_payload=True,
+                secure=secure,
+                categories=[SCALABLE])
+
+            # TODO(jtattermusch): add scenarios go vs C++
+
+    def __str__(self):
+        return 'go'
 
 
 LANGUAGES = {
-    'c++' : CXXLanguage(),
-    'csharp' : CSharpLanguage(),
-    'ruby' : RubyLanguage(),
-    'php7' : Php7Language(),
-    'php7_protobuf_c' : Php7Language(php7_protobuf_c=True),
-    'java' : JavaLanguage(),
-    'python' : PythonLanguage(),
-    'go' : GoLanguage(),
+    'c++': CXXLanguage(),
+    'csharp': CSharpLanguage(),
+    'ruby': RubyLanguage(),
+    'php7': Php7Language(),
+    'php7_protobuf_c': Php7Language(php7_protobuf_c=True),
+    'java': JavaLanguage(),
+    'python': PythonLanguage(),
+    'go': GoLanguage(),
 }
diff --git a/tools/run_tests/python_utils/antagonist.py b/tools/run_tests/python_utils/antagonist.py
index 0d79ce0986..a928a4cb00 100755
--- a/tools/run_tests/python_utils/antagonist.py
+++ b/tools/run_tests/python_utils/antagonist.py
@@ -12,8 +12,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """This is used by run_tests.py to create cpu load on a machine"""
 
 while True:
-	pass
+    pass
diff --git a/tools/run_tests/python_utils/comment_on_pr.py b/tools/run_tests/python_utils/comment_on_pr.py
index 21b9bb7085..399c996d4d 100644
--- a/tools/run_tests/python_utils/comment_on_pr.py
+++ b/tools/run_tests/python_utils/comment_on_pr.py
@@ -16,19 +16,22 @@ import os
 import json
 import urllib2
 
+
 def comment_on_pr(text):
-  if 'JENKINS_OAUTH_TOKEN' not in os.environ:
-    print 'Missing JENKINS_OAUTH_TOKEN env var: not commenting'
-    return
-  if 'ghprbPullId' not in os.environ:
-    print 'Missing ghprbPullId env var: not commenting'
-    return
-  req = urllib2.Request(
-      url = 'https://api.github.com/repos/grpc/grpc/issues/%s/comments' %
-          os.environ['ghprbPullId'],
-      data = json.dumps({'body': text}),
-      headers = {
-        'Authorization': 'token %s' % os.environ['JENKINS_OAUTH_TOKEN'],
-        'Content-Type': 'application/json',
-      })
-  print urllib2.urlopen(req).read()
+    if 'JENKINS_OAUTH_TOKEN' not in os.environ:
+        print 'Missing JENKINS_OAUTH_TOKEN env var: not commenting'
+        return
+    if 'ghprbPullId' not in os.environ:
+        print 'Missing ghprbPullId env var: not commenting'
+        return
+    req = urllib2.Request(
+        url='https://api.github.com/repos/grpc/grpc/issues/%s/comments' %
+        os.environ['ghprbPullId'],
+        data=json.dumps({
+            'body': text
+        }),
+        headers={
+            'Authorization': 'token %s' % os.environ['JENKINS_OAUTH_TOKEN'],
+            'Content-Type': 'application/json',
+        })
+    print urllib2.urlopen(req).read()
diff --git a/tools/run_tests/python_utils/dockerjob.py b/tools/run_tests/python_utils/dockerjob.py
index 2f5285b26c..d2941c0811 100755
--- a/tools/run_tests/python_utils/dockerjob.py
+++ b/tools/run_tests/python_utils/dockerjob.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Helpers to run docker instances as jobs."""
 
 from __future__ import print_function
@@ -28,102 +27,109 @@ _DEVNULL = open(os.devnull, 'w')
 
 
 def random_name(base_name):
-  """Randomizes given base name."""
-  return '%s_%s' % (base_name, uuid.uuid4())
+    """Randomizes given base name."""
+    return '%s_%s' % (base_name, uuid.uuid4())
 
 
 def docker_kill(cid):
-  """Kills a docker container. Returns True if successful."""
-  return subprocess.call(['docker','kill', str(cid)],
-                         stdin=subprocess.PIPE,
-                         stdout=_DEVNULL,
-                         stderr=subprocess.STDOUT) == 0
+    """Kills a docker container. Returns True if successful."""
+    return subprocess.call(
+        ['docker', 'kill', str(cid)],
+        stdin=subprocess.PIPE,
+        stdout=_DEVNULL,
+        stderr=subprocess.STDOUT) == 0
 
 
 def docker_mapped_port(cid, port, timeout_seconds=15):
-  """Get port mapped to internal given internal port for given container."""
-  started = time.time()
-  while time.time() - started < timeout_seconds:
-    try:
-      output = subprocess.check_output('docker port %s %s' % (cid, port),
-                                       stderr=_DEVNULL,
-                                       shell=True)
-      return int(output.split(':', 2)[1])
-    except subprocess.CalledProcessError as e:
-      pass
-  raise Exception('Failed to get exposed port %s for container %s.' %
-                  (port, cid))
+    """Get port mapped to internal given internal port for given container."""
+    started = time.time()
+    while time.time() - started < timeout_seconds:
+        try:
+            output = subprocess.check_output(
+                'docker port %s %s' % (cid, port), stderr=_DEVNULL, shell=True)
+            return int(output.split(':', 2)[1])
+        except subprocess.CalledProcessError as e:
+            pass
+    raise Exception('Failed to get exposed port %s for container %s.' %
+                    (port, cid))
 
 
 def wait_for_healthy(cid, shortname, timeout_seconds):
-  """Wait timeout_seconds for the container to become healthy"""
-  started = time.time()
-  while time.time() - started < timeout_seconds:
-    try:
-      output = subprocess.check_output(
-          ['docker', 'inspect', '--format="{{.State.Health.Status}}"', cid],
-          stderr=_DEVNULL)
-      if output.strip('\n') == 'healthy':
-        return
-    except subprocess.CalledProcessError as e:
-      pass
-    time.sleep(1)
-  raise Exception('Timed out waiting for %s (%s) to pass health check' %
-                  (shortname, cid))
+    """Wait timeout_seconds for the container to become healthy"""
+    started = time.time()
+    while time.time() - started < timeout_seconds:
+        try:
+            output = subprocess.check_output(
+                [
+                    'docker', 'inspect', '--format="{{.State.Health.Status}}"',
+                    cid
+                ],
+                stderr=_DEVNULL)
+            if output.strip('\n') == 'healthy':
+                return
+        except subprocess.CalledProcessError as e:
+            pass
+        time.sleep(1)
+    raise Exception('Timed out waiting for %s (%s) to pass health check' %
+                    (shortname, cid))
 
 
 def finish_jobs(jobs):
-  """Kills given docker containers and waits for corresponding jobs to finish"""
-  for job in jobs:
-    job.kill(suppress_failure=True)
+    """Kills given docker containers and waits for corresponding jobs to finish"""
+    for job in jobs:
+        job.kill(suppress_failure=True)
 
-  while any(job.is_running() for job in jobs):
-    time.sleep(1)
+    while any(job.is_running() for job in jobs):
+        time.sleep(1)
 
 
 def image_exists(image):
-  """Returns True if given docker image exists."""
-  return subprocess.call(['docker','inspect', image],
-                         stdin=subprocess.PIPE,
-                         stdout=_DEVNULL,
-                         stderr=subprocess.STDOUT) == 0
+    """Returns True if given docker image exists."""
+    return subprocess.call(
+        ['docker', 'inspect', image],
+        stdin=subprocess.PIPE,
+        stdout=_DEVNULL,
+        stderr=subprocess.STDOUT) == 0
 
 
 def remove_image(image, skip_nonexistent=False, max_retries=10):
-  """Attempts to remove docker image with retries."""
-  if skip_nonexistent and not image_exists(image):
-    return True
-  for attempt in range(0, max_retries):
-    if subprocess.call(['docker','rmi', '-f', image],
-                       stdin=subprocess.PIPE,
-                       stdout=_DEVNULL,
-                       stderr=subprocess.STDOUT) == 0:
-      return True
-    time.sleep(2)
-  print('Failed to remove docker image %s' % image)
-  return False
+    """Attempts to remove docker image with retries."""
+    if skip_nonexistent and not image_exists(image):
+        return True
+    for attempt in range(0, max_retries):
+        if subprocess.call(
+            ['docker', 'rmi', '-f', image],
+                stdin=subprocess.PIPE,
+                stdout=_DEVNULL,
+                stderr=subprocess.STDOUT) == 0:
+            return True
+        time.sleep(2)
+    print('Failed to remove docker image %s' % image)
+    return False
 
 
 class DockerJob:
-  """Encapsulates a job"""
-
-  def __init__(self, spec):
-    self._spec = spec
-    self._job = jobset.Job(spec, newline_on_success=True, travis=True, add_env={})
-    self._container_name = spec.container_name
-
-  def mapped_port(self, port):
-    return docker_mapped_port(self._container_name, port)
-
-  def wait_for_healthy(self, timeout_seconds):
-    wait_for_healthy(self._container_name, self._spec.shortname, timeout_seconds)
-
-  def kill(self, suppress_failure=False):
-    """Sends kill signal to the container."""
-    if suppress_failure:
-      self._job.suppress_failure_message()
-    return docker_kill(self._container_name)
-
-  def is_running(self):
-    """Polls a job and returns True if given job is still running."""
-    return self._job.state() == jobset._RUNNING
+    """Encapsulates a job"""
+
+    def __init__(self, spec):
+        self._spec = spec
+        self._job = jobset.Job(
+            spec, newline_on_success=True, travis=True, add_env={})
+        self._container_name = spec.container_name
+
+    def mapped_port(self, port):
+        return docker_mapped_port(self._container_name, port)
+
+    def wait_for_healthy(self, timeout_seconds):
+        wait_for_healthy(self._container_name, self._spec.shortname,
+                         timeout_seconds)
+
+    def kill(self, suppress_failure=False):
+        """Sends kill signal to the container."""
+        if suppress_failure:
+            self._job.suppress_failure_message()
+        return docker_kill(self._container_name)
+
+    def is_running(self):
+        """Polls a job and returns True if given job is still running."""
+        return self._job.state() == jobset._RUNNING
diff --git a/tools/run_tests/python_utils/filter_pull_request_tests.py b/tools/run_tests/python_utils/filter_pull_request_tests.py
index e880734651..8e0dc708dd 100644
--- a/tools/run_tests/python_utils/filter_pull_request_tests.py
+++ b/tools/run_tests/python_utils/filter_pull_request_tests.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Filter out tests based on file differences compared to merge target branch"""
 
 from __future__ import print_function
@@ -23,24 +22,25 @@ from subprocess import check_output
 
 
 class TestSuite:
-  """
+    """
   Contains label to identify job as belonging to this test suite and
   triggers to identify if changed files are relevant
   """
-  def __init__(self, labels):
-    """
+
+    def __init__(self, labels):
+        """
     Build TestSuite to group tests based on labeling
     :param label: strings that should match a jobs's platform, config, language, or test group
     """
-    self.triggers = []
-    self.labels = labels
+        self.triggers = []
+        self.labels = labels
 
-  def add_trigger(self, trigger):
-    """
+    def add_trigger(self, trigger):
+        """
     Add a regex to list of triggers that determine if a changed file should run tests
     :param trigger: regex matching file relevant to tests
     """
-    self.triggers.append(trigger)
+        self.triggers.append(trigger)
 
 
 # Create test suites
@@ -55,10 +55,11 @@ _RUBY_TEST_SUITE = TestSuite(['ruby'])
 _LINUX_TEST_SUITE = TestSuite(['linux'])
 _WINDOWS_TEST_SUITE = TestSuite(['windows'])
 _MACOS_TEST_SUITE = TestSuite(['macos'])
-_ALL_TEST_SUITES = [_CORE_TEST_SUITE, _CPP_TEST_SUITE, _CSHARP_TEST_SUITE,
-                    _NODE_TEST_SUITE, _OBJC_TEST_SUITE, _PHP_TEST_SUITE,
-                    _PYTHON_TEST_SUITE, _RUBY_TEST_SUITE, _LINUX_TEST_SUITE,
-                    _WINDOWS_TEST_SUITE, _MACOS_TEST_SUITE]
+_ALL_TEST_SUITES = [
+    _CORE_TEST_SUITE, _CPP_TEST_SUITE, _CSHARP_TEST_SUITE, _NODE_TEST_SUITE,
+    _OBJC_TEST_SUITE, _PHP_TEST_SUITE, _PYTHON_TEST_SUITE, _RUBY_TEST_SUITE,
+    _LINUX_TEST_SUITE, _WINDOWS_TEST_SUITE, _MACOS_TEST_SUITE
+]
 
 # Dictionary of whitelistable files where the key is a regex matching changed files
 # and the value is a list of tests that should be run. An empty list means that
@@ -66,46 +67,46 @@ _ALL_TEST_SUITES = [_CORE_TEST_SUITE, _CPP_TEST_SUITE, _CSHARP_TEST_SUITE,
 # match any of these regexes will trigger all tests
 # DO NOT CHANGE THIS UNLESS YOU KNOW WHAT YOU ARE DOING (be careful even if you do)
 _WHITELIST_DICT = {
-  '^doc/': [],
-  '^examples/': [],
-  '^include/grpc\+\+/': [_CPP_TEST_SUITE],
-  '^summerofcode/': [],
-  '^src/cpp/': [_CPP_TEST_SUITE],
-  '^src/csharp/': [_CSHARP_TEST_SUITE],
-  '^src/objective\-c/': [_OBJC_TEST_SUITE],
-  '^src/php/': [_PHP_TEST_SUITE],
-  '^src/python/': [_PYTHON_TEST_SUITE],
-  '^src/ruby/': [_RUBY_TEST_SUITE],
-  '^templates/': [],
-  '^test/core/': [_CORE_TEST_SUITE, _CPP_TEST_SUITE],
-  '^test/cpp/': [_CPP_TEST_SUITE],
-  '^test/distrib/cpp/': [_CPP_TEST_SUITE],
-  '^test/distrib/csharp/': [_CSHARP_TEST_SUITE],
-  '^test/distrib/php/': [_PHP_TEST_SUITE],
-  '^test/distrib/python/': [_PYTHON_TEST_SUITE],
-  '^test/distrib/ruby/': [_RUBY_TEST_SUITE],
-  '^vsprojects/': [_WINDOWS_TEST_SUITE],
-  'composer\.json$': [_PHP_TEST_SUITE],
-  'config\.m4$': [_PHP_TEST_SUITE],
-  'CONTRIBUTING\.md$': [],
-  'Gemfile$': [_RUBY_TEST_SUITE],
-  'grpc\.def$': [_WINDOWS_TEST_SUITE],
-  'grpc\.gemspec$': [_RUBY_TEST_SUITE],
-  'gRPC\.podspec$': [_OBJC_TEST_SUITE],
-  'gRPC\-Core\.podspec$': [_OBJC_TEST_SUITE],
-  'gRPC\-ProtoRPC\.podspec$': [_OBJC_TEST_SUITE],
-  'gRPC\-RxLibrary\.podspec$': [_OBJC_TEST_SUITE],
-  'INSTALL\.md$': [],
-  'LICENSE$': [],
-  'MANIFEST\.md$': [],
-  'package\.json$': [_PHP_TEST_SUITE],
-  'package\.xml$': [_PHP_TEST_SUITE],
-  'PATENTS$': [],
-  'PYTHON\-MANIFEST\.in$': [_PYTHON_TEST_SUITE],
-  'README\.md$': [],
-  'requirements\.txt$': [_PYTHON_TEST_SUITE],
-  'setup\.cfg$': [_PYTHON_TEST_SUITE],
-  'setup\.py$': [_PYTHON_TEST_SUITE]
+    '^doc/': [],
+    '^examples/': [],
+    '^include/grpc\+\+/': [_CPP_TEST_SUITE],
+    '^summerofcode/': [],
+    '^src/cpp/': [_CPP_TEST_SUITE],
+    '^src/csharp/': [_CSHARP_TEST_SUITE],
+    '^src/objective\-c/': [_OBJC_TEST_SUITE],
+    '^src/php/': [_PHP_TEST_SUITE],
+    '^src/python/': [_PYTHON_TEST_SUITE],
+    '^src/ruby/': [_RUBY_TEST_SUITE],
+    '^templates/': [],
+    '^test/core/': [_CORE_TEST_SUITE, _CPP_TEST_SUITE],
+    '^test/cpp/': [_CPP_TEST_SUITE],
+    '^test/distrib/cpp/': [_CPP_TEST_SUITE],
+    '^test/distrib/csharp/': [_CSHARP_TEST_SUITE],
+    '^test/distrib/php/': [_PHP_TEST_SUITE],
+    '^test/distrib/python/': [_PYTHON_TEST_SUITE],
+    '^test/distrib/ruby/': [_RUBY_TEST_SUITE],
+    '^vsprojects/': [_WINDOWS_TEST_SUITE],
+    'composer\.json$': [_PHP_TEST_SUITE],
+    'config\.m4$': [_PHP_TEST_SUITE],
+    'CONTRIBUTING\.md$': [],
+    'Gemfile$': [_RUBY_TEST_SUITE],
+    'grpc\.def$': [_WINDOWS_TEST_SUITE],
+    'grpc\.gemspec$': [_RUBY_TEST_SUITE],
+    'gRPC\.podspec$': [_OBJC_TEST_SUITE],
+    'gRPC\-Core\.podspec$': [_OBJC_TEST_SUITE],
+    'gRPC\-ProtoRPC\.podspec$': [_OBJC_TEST_SUITE],
+    'gRPC\-RxLibrary\.podspec$': [_OBJC_TEST_SUITE],
+    'INSTALL\.md$': [],
+    'LICENSE$': [],
+    'MANIFEST\.md$': [],
+    'package\.json$': [_PHP_TEST_SUITE],
+    'package\.xml$': [_PHP_TEST_SUITE],
+    'PATENTS$': [],
+    'PYTHON\-MANIFEST\.in$': [_PYTHON_TEST_SUITE],
+    'README\.md$': [],
+    'requirements\.txt$': [_PYTHON_TEST_SUITE],
+    'setup\.cfg$': [_PYTHON_TEST_SUITE],
+    'setup\.py$': [_PYTHON_TEST_SUITE]
 }
 
 # Regex that combines all keys in _WHITELIST_DICT
@@ -113,83 +114,88 @@ _ALL_TRIGGERS = "(" + ")|(".join(_WHITELIST_DICT.keys()) + ")"
 
 # Add all triggers to their respective test suites
 for trigger, test_suites in six.iteritems(_WHITELIST_DICT):
-  for test_suite in test_suites:
-    test_suite.add_trigger(trigger)
+    for test_suite in test_suites:
+        test_suite.add_trigger(trigger)
 
 
 def _get_changed_files(base_branch):
-  """
+    """
   Get list of changed files between current branch and base of target merge branch
   """
-  # Get file changes between branch and merge-base of specified branch
-  # Not combined to be Windows friendly
-  base_commit = check_output(["git", "merge-base", base_branch, "HEAD"]).rstrip()
-  return check_output(["git", "diff", base_commit, "--name-only", "HEAD"]).splitlines()
+    # Get file changes between branch and merge-base of specified branch
+    # Not combined to be Windows friendly
+    base_commit = check_output(
+        ["git", "merge-base", base_branch, "HEAD"]).rstrip()
+    return check_output(
+        ["git", "diff", base_commit, "--name-only", "HEAD"]).splitlines()
 
 
 def _can_skip_tests(file_names, triggers):
-  """
+    """
   Determines if tests are skippable based on if all files do not match list of regexes
   :param file_names: list of changed files generated by _get_changed_files()
   :param triggers: list of regexes matching file name that indicates tests should be run
   :return: safe to skip tests
   """
-  for file_name in file_names:
-    if any(re.match(trigger, file_name) for trigger in triggers):
-      return False
-  return True
+    for file_name in file_names:
+        if any(re.match(trigger, file_name) for trigger in triggers):
+            return False
+    return True
 
 
 def _remove_irrelevant_tests(tests, skippable_labels):
-  """
+    """
   Filters out tests by config or language - will not remove sanitizer tests
   :param tests: list of all tests generated by run_tests_matrix.py
   :param skippable_labels: list of languages and platforms with skippable tests
   :return: list of relevant tests
   """
-  # test.labels[0] is platform and test.labels[2] is language
-  # We skip a test if both are considered safe to skip
-  return [test for test in tests if test.labels[0] not in skippable_labels or \
-          test.labels[2] not in skippable_labels]
+    # test.labels[0] is platform and test.labels[2] is language
+    # We skip a test if both are considered safe to skip
+    return [test for test in tests if test.labels[0] not in skippable_labels or \
+            test.labels[2] not in skippable_labels]
 
 
 def affects_c_cpp(base_branch):
-  """
+    """
   Determines if a pull request's changes affect C/C++. This function exists because
   there are pull request tests that only test C/C++ code
   :param base_branch: branch that a pull request is requesting to merge into
   :return: boolean indicating whether C/C++ changes are made in pull request
   """
-  changed_files = _get_changed_files(base_branch)
-  # Run all tests if any changed file is not in the whitelist dictionary
-  for changed_file in changed_files:
-    if not re.match(_ALL_TRIGGERS, changed_file):
-      return True
-  return not _can_skip_tests(changed_files, _CPP_TEST_SUITE.triggers + _CORE_TEST_SUITE.triggers)
+    changed_files = _get_changed_files(base_branch)
+    # Run all tests if any changed file is not in the whitelist dictionary
+    for changed_file in changed_files:
+        if not re.match(_ALL_TRIGGERS, changed_file):
+            return True
+    return not _can_skip_tests(
+        changed_files, _CPP_TEST_SUITE.triggers + _CORE_TEST_SUITE.triggers)
 
 
 def filter_tests(tests, base_branch):
-  """
+    """
   Filters out tests that are safe to ignore
   :param tests: list of all tests generated by run_tests_matrix.py
   :return: list of relevant tests
   """
-  print('Finding file differences between gRPC %s branch and pull request...\n' % base_branch)
-  changed_files = _get_changed_files(base_branch)
-  for changed_file in changed_files:
-    print('  %s' % changed_file)
-  print('')
-
-  # Run all tests if any changed file is not in the whitelist dictionary
-  for changed_file in changed_files:
-    if not re.match(_ALL_TRIGGERS, changed_file):
-      return(tests)
-  # Figure out which language and platform tests to run
-  skippable_labels = []
-  for test_suite in _ALL_TEST_SUITES:
-    if _can_skip_tests(changed_files, test_suite.triggers):
-      for label in test_suite.labels:
-        print('  %s tests safe to skip' % label)
-        skippable_labels.append(label)
-  tests = _remove_irrelevant_tests(tests, skippable_labels)
-  return tests
+    print(
+        'Finding file differences between gRPC %s branch and pull request...\n'
+        % base_branch)
+    changed_files = _get_changed_files(base_branch)
+    for changed_file in changed_files:
+        print('  %s' % changed_file)
+    print('')
+
+    # Run all tests if any changed file is not in the whitelist dictionary
+    for changed_file in changed_files:
+        if not re.match(_ALL_TRIGGERS, changed_file):
+            return (tests)
+    # Figure out which language and platform tests to run
+    skippable_labels = []
+    for test_suite in _ALL_TEST_SUITES:
+        if _can_skip_tests(changed_files, test_suite.triggers):
+            for label in test_suite.labels:
+                print('  %s tests safe to skip' % label)
+                skippable_labels.append(label)
+    tests = _remove_irrelevant_tests(tests, skippable_labels)
+    return tests
diff --git a/tools/run_tests/python_utils/jobset.py b/tools/run_tests/python_utils/jobset.py
index 85eef444ef..454d09bf0d 100755
--- a/tools/run_tests/python_utils/jobset.py
+++ b/tools/run_tests/python_utils/jobset.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Run a group of subprocesses and then finish."""
 
 from __future__ import print_function
@@ -28,11 +27,9 @@ import tempfile
 import time
 import errno
 
-
 # cpu cost measurement
 measure_cpu_costs = False
 
-
 _DEFAULT_MAX_JOBS = 16 * multiprocessing.cpu_count()
 _MAX_RESULT_SIZE = 8192
 
@@ -42,63 +39,60 @@ _MAX_RESULT_SIZE = 8192
 # characters to the PR description, which leak into the environment here
 # and cause failures.
 def strip_non_ascii_chars(s):
-  return ''.join(c for c in s if ord(c) < 128)
+    return ''.join(c for c in s if ord(c) < 128)
 
 
 def sanitized_environment(env):
-  sanitized = {}
-  for key, value in env.items():
-    sanitized[strip_non_ascii_chars(key)] = strip_non_ascii_chars(value)
-  return sanitized
+    sanitized = {}
+    for key, value in env.items():
+        sanitized[strip_non_ascii_chars(key)] = strip_non_ascii_chars(value)
+    return sanitized
 
 
 def platform_string():
-  if platform.system() == 'Windows':
-    return 'windows'
-  elif platform.system()[:7] == 'MSYS_NT':
-    return 'windows'
-  elif platform.system() == 'Darwin':
-    return 'mac'
-  elif platform.system() == 'Linux':
-    return 'linux'
-  else:
-    return 'posix'
+    if platform.system() == 'Windows':
+        return 'windows'
+    elif platform.system()[:7] == 'MSYS_NT':
+        return 'windows'
+    elif platform.system() == 'Darwin':
+        return 'mac'
+    elif platform.system() == 'Linux':
+        return 'linux'
+    else:
+        return 'posix'
 
 
 # setup a signal handler so that signal.pause registers 'something'
 # when a child finishes
 # not using futures and threading to avoid a dependency on subprocess32
 if platform_string() == 'windows':
-  pass
-else:
-  def alarm_handler(unused_signum, unused_frame):
     pass
+else:
 
-  signal.signal(signal.SIGCHLD, lambda unused_signum, unused_frame: None)
-  signal.signal(signal.SIGALRM, alarm_handler)
+    def alarm_handler(unused_signum, unused_frame):
+        pass
 
+    signal.signal(signal.SIGCHLD, lambda unused_signum, unused_frame: None)
+    signal.signal(signal.SIGALRM, alarm_handler)
 
 _SUCCESS = object()
 _FAILURE = object()
 _RUNNING = object()
 _KILLED = object()
 
-
 _COLORS = {
-    'red': [ 31, 0 ],
-    'green': [ 32, 0 ],
-    'yellow': [ 33, 0 ],
-    'lightgray': [ 37, 0],
-    'gray': [ 30, 1 ],
-    'purple': [ 35, 0 ],
-    'cyan': [ 36, 0 ]
-    }
-
+    'red': [31, 0],
+    'green': [32, 0],
+    'yellow': [33, 0],
+    'lightgray': [37, 0],
+    'gray': [30, 1],
+    'purple': [35, 0],
+    'cyan': [36, 0]
+}
 
 _BEGINNING_OF_LINE = '\x1b[0G'
 _CLEAR_LINE = '\x1b[2K'
 
-
 _TAG_COLOR = {
     'FAILED': 'red',
     'FLAKE': 'purple',
@@ -111,392 +105,435 @@ _TAG_COLOR = {
     'SUCCESS': 'green',
     'IDLE': 'gray',
     'SKIPPED': 'cyan'
-    }
+}
 
 _FORMAT = '%(asctime)-15s %(message)s'
 logging.basicConfig(level=logging.INFO, format=_FORMAT)
 
 
 def eintr_be_gone(fn):
-  """Run fn until it doesn't stop because of EINTR"""
-  while True:
-    try:
-      return fn()
-    except IOError, e:
-      if e.errno != errno.EINTR:
-        raise
-
+    """Run fn until it doesn't stop because of EINTR"""
+    while True:
+        try:
+            return fn()
+        except IOError, e:
+            if e.errno != errno.EINTR:
+                raise
 
 
 def message(tag, msg, explanatory_text=None, do_newline=False):
-  if message.old_tag == tag and message.old_msg == msg and not explanatory_text:
-    return
-  message.old_tag = tag
-  message.old_msg = msg
-  while True:
-    try:
-      if platform_string() == 'windows' or not sys.stdout.isatty():
-        if explanatory_text:
-          logging.info(explanatory_text)
-        logging.info('%s: %s', tag, msg)
-      else:
-        sys.stdout.write('%s%s%s\x1b[%d;%dm%s\x1b[0m: %s%s' % (
-            _BEGINNING_OF_LINE,
-            _CLEAR_LINE,
-            '\n%s' % explanatory_text if explanatory_text is not None else '',
-            _COLORS[_TAG_COLOR[tag]][1],
-            _COLORS[_TAG_COLOR[tag]][0],
-            tag,
-            msg,
-            '\n' if do_newline or explanatory_text is not None else ''))
-      sys.stdout.flush()
-      return
-    except IOError, e:
-      if e.errno != errno.EINTR:
-        raise
+    if message.old_tag == tag and message.old_msg == msg and not explanatory_text:
+        return
+    message.old_tag = tag
+    message.old_msg = msg
+    while True:
+        try:
+            if platform_string() == 'windows' or not sys.stdout.isatty():
+                if explanatory_text:
+                    logging.info(explanatory_text)
+                logging.info('%s: %s', tag, msg)
+            else:
+                sys.stdout.write('%s%s%s\x1b[%d;%dm%s\x1b[0m: %s%s' % (
+                    _BEGINNING_OF_LINE, _CLEAR_LINE, '\n%s' % explanatory_text
+                    if explanatory_text is not None else '',
+                    _COLORS[_TAG_COLOR[tag]][1], _COLORS[_TAG_COLOR[tag]][0],
+                    tag, msg, '\n'
+                    if do_newline or explanatory_text is not None else ''))
+            sys.stdout.flush()
+            return
+        except IOError, e:
+            if e.errno != errno.EINTR:
+                raise
+
 
 message.old_tag = ''
 message.old_msg = ''
 
+
 def which(filename):
-  if '/' in filename:
-    return filename
-  for path in os.environ['PATH'].split(os.pathsep):
-    if os.path.exists(os.path.join(path, filename)):
-      return os.path.join(path, filename)
-  raise Exception('%s not found' % filename)
+    if '/' in filename:
+        return filename
+    for path in os.environ['PATH'].split(os.pathsep):
+        if os.path.exists(os.path.join(path, filename)):
+            return os.path.join(path, filename)
+    raise Exception('%s not found' % filename)
 
 
 class JobSpec(object):
-  """Specifies what to run for a job."""
-
-  def __init__(self, cmdline, shortname=None, environ=None,
-               cwd=None, shell=False, timeout_seconds=5*60, flake_retries=0,
-               timeout_retries=0, kill_handler=None, cpu_cost=1.0,
-               verbose_success=False):
-    """
+    """Specifies what to run for a job."""
+
+    def __init__(self,
+                 cmdline,
+                 shortname=None,
+                 environ=None,
+                 cwd=None,
+                 shell=False,
+                 timeout_seconds=5 * 60,
+                 flake_retries=0,
+                 timeout_retries=0,
+                 kill_handler=None,
+                 cpu_cost=1.0,
+                 verbose_success=False):
+        """
     Arguments:
       cmdline: a list of arguments to pass as the command line
       environ: a dictionary of environment variables to set in the child process
       kill_handler: a handler that will be called whenever job.kill() is invoked
       cpu_cost: number of cores per second this job needs
     """
-    if environ is None:
-      environ = {}
-    self.cmdline = cmdline
-    self.environ = environ
-    self.shortname = cmdline[0] if shortname is None else shortname
-    self.cwd = cwd
-    self.shell = shell
-    self.timeout_seconds = timeout_seconds
-    self.flake_retries = flake_retries
-    self.timeout_retries = timeout_retries
-    self.kill_handler = kill_handler
-    self.cpu_cost = cpu_cost
-    self.verbose_success = verbose_success
-
-  def identity(self):
-    return '%r %r' % (self.cmdline, self.environ)
-
-  def __hash__(self):
-    return hash(self.identity())
-
-  def __cmp__(self, other):
-    return self.identity() == other.identity()
-
-  def __repr__(self):
-    return 'JobSpec(shortname=%s, cmdline=%s)' % (self.shortname, self.cmdline)
-
-  def __str__(self):
-    return '%s: %s %s' % (self.shortname,
-                          ' '.join('%s=%s' % kv for kv in self.environ.items()),
-                          ' '.join(self.cmdline))
+        if environ is None:
+            environ = {}
+        self.cmdline = cmdline
+        self.environ = environ
+        self.shortname = cmdline[0] if shortname is None else shortname
+        self.cwd = cwd
+        self.shell = shell
+        self.timeout_seconds = timeout_seconds
+        self.flake_retries = flake_retries
+        self.timeout_retries = timeout_retries
+        self.kill_handler = kill_handler
+        self.cpu_cost = cpu_cost
+        self.verbose_success = verbose_success
+
+    def identity(self):
+        return '%r %r' % (self.cmdline, self.environ)
+
+    def __hash__(self):
+        return hash(self.identity())
+
+    def __cmp__(self, other):
+        return self.identity() == other.identity()
+
+    def __repr__(self):
+        return 'JobSpec(shortname=%s, cmdline=%s)' % (self.shortname,
+                                                      self.cmdline)
+
+    def __str__(self):
+        return '%s: %s %s' % (self.shortname, ' '.join(
+            '%s=%s' % kv
+            for kv in self.environ.items()), ' '.join(self.cmdline))
 
 
 class JobResult(object):
-  def __init__(self):
-    self.state = 'UNKNOWN'
-    self.returncode = -1
-    self.elapsed_time = 0
-    self.num_failures = 0
-    self.retries = 0
-    self.message = ''
-    self.cpu_estimated = 1
-    self.cpu_measured = 1
+
+    def __init__(self):
+        self.state = 'UNKNOWN'
+        self.returncode = -1
+        self.elapsed_time = 0
+        self.num_failures = 0
+        self.retries = 0
+        self.message = ''
+        self.cpu_estimated = 1
+        self.cpu_measured = 1
 
 
 def read_from_start(f):
-  f.seek(0)
-  return f.read()
+    f.seek(0)
+    return f.read()
 
 
 class Job(object):
-  """Manages one job."""
-
-  def __init__(self, spec, newline_on_success, travis, add_env,
-               quiet_success=False):
-    self._spec = spec
-    self._newline_on_success = newline_on_success
-    self._travis = travis
-    self._add_env = add_env.copy()
-    self._retries = 0
-    self._timeout_retries = 0
-    self._suppress_failure_message = False
-    self._quiet_success = quiet_success
-    if not self._quiet_success:
-      message('START', spec.shortname, do_newline=self._travis)
-    self.result = JobResult()
-    self.start()
-
-  def GetSpec(self):
-    return self._spec
-
-  def start(self):
-    self._tempfile = tempfile.TemporaryFile()
-    env = dict(os.environ)
-    env.update(self._spec.environ)
-    env.update(self._add_env)
-    env = sanitized_environment(env)
-    self._start = time.time()
-    cmdline = self._spec.cmdline
-    # The Unix time command is finicky when used with MSBuild, so we don't use it
-    # with jobs that run MSBuild.
-    global measure_cpu_costs
-    if measure_cpu_costs and not 'vsprojects\\build' in cmdline[0]:
-      cmdline = ['time', '-p'] + cmdline
-    else:
-      measure_cpu_costs = False
-    try_start = lambda: subprocess.Popen(args=cmdline,
-                                         stderr=subprocess.STDOUT,
-                                         stdout=self._tempfile,
-                                         cwd=self._spec.cwd,
-                                         shell=self._spec.shell,
-                                         env=env)
-    delay = 0.3
-    for i in range(0, 4):
-      try:
-        self._process = try_start()
-        break
-      except OSError:
-        message('WARNING', 'Failed to start %s, retrying in %f seconds' % (self._spec.shortname, delay))
-        time.sleep(delay)
-        delay *= 2
-    else:
-      self._process = try_start()
-    self._state = _RUNNING
-
-  def state(self):
-    """Poll current state of the job. Prints messages at completion."""
-    def stdout(self=self):
-      stdout = read_from_start(self._tempfile)
-      self.result.message = stdout[-_MAX_RESULT_SIZE:]
-      return stdout
-    if self._state == _RUNNING and self._process.poll() is not None:
-      elapsed = time.time() - self._start
-      self.result.elapsed_time = elapsed
-      if self._process.returncode != 0:
-        if self._retries < self._spec.flake_retries:
-          message('FLAKE', '%s [ret=%d, pid=%d]' % (
-            self._spec.shortname, self._process.returncode, self._process.pid),
-            stdout(), do_newline=True)
-          self._retries += 1
-          self.result.num_failures += 1
-          self.result.retries = self._timeout_retries + self._retries
-          # NOTE: job is restarted regardless of jobset's max_time setting
-          self.start()
-        else:
-          self._state = _FAILURE
-          if not self._suppress_failure_message:
-            message('FAILED', '%s [ret=%d, pid=%d, time=%.1fsec]' % (
-                self._spec.shortname, self._process.returncode, self._process.pid, elapsed),
-                stdout(), do_newline=True)
-          self.result.state = 'FAILED'
-          self.result.num_failures += 1
-          self.result.returncode = self._process.returncode
-      else:
-        self._state = _SUCCESS
-        measurement = ''
-        if measure_cpu_costs:
-          m = re.search(r'real\s+([0-9.]+)\nuser\s+([0-9.]+)\nsys\s+([0-9.]+)', stdout())
-          real = float(m.group(1))
-          user = float(m.group(2))
-          sys = float(m.group(3))
-          if real > 0.5:
-            cores = (user + sys) / real
-            self.result.cpu_measured = float('%.01f' % cores)
-            self.result.cpu_estimated = float('%.01f' % self._spec.cpu_cost)
-            measurement = '; cpu_cost=%.01f; estimated=%.01f' % (self.result.cpu_measured, self.result.cpu_estimated)
+    """Manages one job."""
+
+    def __init__(self,
+                 spec,
+                 newline_on_success,
+                 travis,
+                 add_env,
+                 quiet_success=False):
+        self._spec = spec
+        self._newline_on_success = newline_on_success
+        self._travis = travis
+        self._add_env = add_env.copy()
+        self._retries = 0
+        self._timeout_retries = 0
+        self._suppress_failure_message = False
+        self._quiet_success = quiet_success
         if not self._quiet_success:
-          message('PASSED', '%s [time=%.1fsec, retries=%d:%d%s]' % (
-              self._spec.shortname, elapsed, self._retries, self._timeout_retries, measurement),
-              stdout() if self._spec.verbose_success else None,
-              do_newline=self._newline_on_success or self._travis)
-        self.result.state = 'PASSED'
-    elif (self._state == _RUNNING and
-          self._spec.timeout_seconds is not None and
-          time.time() - self._start > self._spec.timeout_seconds):
-      elapsed = time.time() - self._start
-      self.result.elapsed_time = elapsed
-      if self._timeout_retries < self._spec.timeout_retries:
-        message('TIMEOUT_FLAKE', '%s [pid=%d]' % (self._spec.shortname, self._process.pid), stdout(), do_newline=True)
-        self._timeout_retries += 1
-        self.result.num_failures += 1
-        self.result.retries = self._timeout_retries + self._retries
-        if self._spec.kill_handler:
-          self._spec.kill_handler(self)
-        self._process.terminate()
-        # NOTE: job is restarted regardless of jobset's max_time setting
+            message('START', spec.shortname, do_newline=self._travis)
+        self.result = JobResult()
         self.start()
-      else:
-        message('TIMEOUT', '%s [pid=%d, time=%.1fsec]' % (self._spec.shortname, self._process.pid, elapsed), stdout(), do_newline=True)
-        self.kill()
-        self.result.state = 'TIMEOUT'
-        self.result.num_failures += 1
-    return self._state
 
-  def kill(self):
-    if self._state == _RUNNING:
-      self._state = _KILLED
-      if self._spec.kill_handler:
-        self._spec.kill_handler(self)
-      self._process.terminate()
-
-  def suppress_failure_message(self):
-    self._suppress_failure_message = True
+    def GetSpec(self):
+        return self._spec
+
+    def start(self):
+        self._tempfile = tempfile.TemporaryFile()
+        env = dict(os.environ)
+        env.update(self._spec.environ)
+        env.update(self._add_env)
+        env = sanitized_environment(env)
+        self._start = time.time()
+        cmdline = self._spec.cmdline
+        # The Unix time command is finicky when used with MSBuild, so we don't use it
+        # with jobs that run MSBuild.
+        global measure_cpu_costs
+        if measure_cpu_costs and not 'vsprojects\\build' in cmdline[0]:
+            cmdline = ['time', '-p'] + cmdline
+        else:
+            measure_cpu_costs = False
+        try_start = lambda: subprocess.Popen(args=cmdline,
+                                             stderr=subprocess.STDOUT,
+                                             stdout=self._tempfile,
+                                             cwd=self._spec.cwd,
+                                             shell=self._spec.shell,
+                                             env=env)
+        delay = 0.3
+        for i in range(0, 4):
+            try:
+                self._process = try_start()
+                break
+            except OSError:
+                message('WARNING', 'Failed to start %s, retrying in %f seconds'
+                        % (self._spec.shortname, delay))
+                time.sleep(delay)
+                delay *= 2
+        else:
+            self._process = try_start()
+        self._state = _RUNNING
+
+    def state(self):
+        """Poll current state of the job. Prints messages at completion."""
+
+        def stdout(self=self):
+            stdout = read_from_start(self._tempfile)
+            self.result.message = stdout[-_MAX_RESULT_SIZE:]
+            return stdout
+
+        if self._state == _RUNNING and self._process.poll() is not None:
+            elapsed = time.time() - self._start
+            self.result.elapsed_time = elapsed
+            if self._process.returncode != 0:
+                if self._retries < self._spec.flake_retries:
+                    message(
+                        'FLAKE',
+                        '%s [ret=%d, pid=%d]' %
+                        (self._spec.shortname, self._process.returncode,
+                         self._process.pid),
+                        stdout(),
+                        do_newline=True)
+                    self._retries += 1
+                    self.result.num_failures += 1
+                    self.result.retries = self._timeout_retries + self._retries
+                    # NOTE: job is restarted regardless of jobset's max_time setting
+                    self.start()
+                else:
+                    self._state = _FAILURE
+                    if not self._suppress_failure_message:
+                        message(
+                            'FAILED',
+                            '%s [ret=%d, pid=%d, time=%.1fsec]' %
+                            (self._spec.shortname, self._process.returncode,
+                             self._process.pid, elapsed),
+                            stdout(),
+                            do_newline=True)
+                    self.result.state = 'FAILED'
+                    self.result.num_failures += 1
+                    self.result.returncode = self._process.returncode
+            else:
+                self._state = _SUCCESS
+                measurement = ''
+                if measure_cpu_costs:
+                    m = re.search(
+                        r'real\s+([0-9.]+)\nuser\s+([0-9.]+)\nsys\s+([0-9.]+)',
+                        stdout())
+                    real = float(m.group(1))
+                    user = float(m.group(2))
+                    sys = float(m.group(3))
+                    if real > 0.5:
+                        cores = (user + sys) / real
+                        self.result.cpu_measured = float('%.01f' % cores)
+                        self.result.cpu_estimated = float('%.01f' %
+                                                          self._spec.cpu_cost)
+                        measurement = '; cpu_cost=%.01f; estimated=%.01f' % (
+                            self.result.cpu_measured, self.result.cpu_estimated)
+                if not self._quiet_success:
+                    message(
+                        'PASSED',
+                        '%s [time=%.1fsec, retries=%d:%d%s]' %
+                        (self._spec.shortname, elapsed, self._retries,
+                         self._timeout_retries, measurement),
+                        stdout() if self._spec.verbose_success else None,
+                        do_newline=self._newline_on_success or self._travis)
+                self.result.state = 'PASSED'
+        elif (self._state == _RUNNING and
+              self._spec.timeout_seconds is not None and
+              time.time() - self._start > self._spec.timeout_seconds):
+            elapsed = time.time() - self._start
+            self.result.elapsed_time = elapsed
+            if self._timeout_retries < self._spec.timeout_retries:
+                message(
+                    'TIMEOUT_FLAKE',
+                    '%s [pid=%d]' % (self._spec.shortname, self._process.pid),
+                    stdout(),
+                    do_newline=True)
+                self._timeout_retries += 1
+                self.result.num_failures += 1
+                self.result.retries = self._timeout_retries + self._retries
+                if self._spec.kill_handler:
+                    self._spec.kill_handler(self)
+                self._process.terminate()
+                # NOTE: job is restarted regardless of jobset's max_time setting
+                self.start()
+            else:
+                message(
+                    'TIMEOUT',
+                    '%s [pid=%d, time=%.1fsec]' %
+                    (self._spec.shortname, self._process.pid, elapsed),
+                    stdout(),
+                    do_newline=True)
+                self.kill()
+                self.result.state = 'TIMEOUT'
+                self.result.num_failures += 1
+        return self._state
+
+    def kill(self):
+        if self._state == _RUNNING:
+            self._state = _KILLED
+            if self._spec.kill_handler:
+                self._spec.kill_handler(self)
+            self._process.terminate()
+
+    def suppress_failure_message(self):
+        self._suppress_failure_message = True
 
 
 class Jobset(object):
-  """Manages one run of jobs."""
-
-  def __init__(self, check_cancelled, maxjobs, maxjobs_cpu_agnostic, newline_on_success, travis,
-               stop_on_failure, add_env, quiet_success, max_time):
-    self._running = set()
-    self._check_cancelled = check_cancelled
-    self._cancelled = False
-    self._failures = 0
-    self._completed = 0
-    self._maxjobs = maxjobs
-    self._maxjobs_cpu_agnostic = maxjobs_cpu_agnostic
-    self._newline_on_success = newline_on_success
-    self._travis = travis
-    self._stop_on_failure = stop_on_failure
-    self._add_env = add_env
-    self._quiet_success = quiet_success
-    self._max_time = max_time
-    self.resultset = {}
-    self._remaining = None
-    self._start_time = time.time()
-
-  def set_remaining(self, remaining):
-    self._remaining = remaining
-
-  def get_num_failures(self):
-    return self._failures
-
-  def cpu_cost(self):
-    c = 0
-    for job in self._running:
-      c += job._spec.cpu_cost
-    return c
-
-  def start(self, spec):
-    """Start a job. Return True on success, False on failure."""
-    while True:
-      if self._max_time > 0 and time.time() - self._start_time > self._max_time:
-        skipped_job_result = JobResult()
-        skipped_job_result.state = 'SKIPPED'
-        message('SKIPPED', spec.shortname, do_newline=True)
-        self.resultset[spec.shortname] = [skipped_job_result]
+    """Manages one run of jobs."""
+
+    def __init__(self, check_cancelled, maxjobs, maxjobs_cpu_agnostic,
+                 newline_on_success, travis, stop_on_failure, add_env,
+                 quiet_success, max_time):
+        self._running = set()
+        self._check_cancelled = check_cancelled
+        self._cancelled = False
+        self._failures = 0
+        self._completed = 0
+        self._maxjobs = maxjobs
+        self._maxjobs_cpu_agnostic = maxjobs_cpu_agnostic
+        self._newline_on_success = newline_on_success
+        self._travis = travis
+        self._stop_on_failure = stop_on_failure
+        self._add_env = add_env
+        self._quiet_success = quiet_success
+        self._max_time = max_time
+        self.resultset = {}
+        self._remaining = None
+        self._start_time = time.time()
+
+    def set_remaining(self, remaining):
+        self._remaining = remaining
+
+    def get_num_failures(self):
+        return self._failures
+
+    def cpu_cost(self):
+        c = 0
+        for job in self._running:
+            c += job._spec.cpu_cost
+        return c
+
+    def start(self, spec):
+        """Start a job. Return True on success, False on failure."""
+        while True:
+            if self._max_time > 0 and time.time(
+            ) - self._start_time > self._max_time:
+                skipped_job_result = JobResult()
+                skipped_job_result.state = 'SKIPPED'
+                message('SKIPPED', spec.shortname, do_newline=True)
+                self.resultset[spec.shortname] = [skipped_job_result]
+                return True
+            if self.cancelled(): return False
+            current_cpu_cost = self.cpu_cost()
+            if current_cpu_cost == 0: break
+            if current_cpu_cost + spec.cpu_cost <= self._maxjobs:
+                if len(self._running) < self._maxjobs_cpu_agnostic:
+                    break
+            self.reap(spec.shortname, spec.cpu_cost)
+        if self.cancelled(): return False
+        job = Job(spec, self._newline_on_success, self._travis, self._add_env,
+                  self._quiet_success)
+        self._running.add(job)
+        if job.GetSpec().shortname not in self.resultset:
+            self.resultset[job.GetSpec().shortname] = []
         return True
-      if self.cancelled(): return False
-      current_cpu_cost = self.cpu_cost()
-      if current_cpu_cost == 0: break
-      if current_cpu_cost + spec.cpu_cost <= self._maxjobs:
-        if len(self._running) < self._maxjobs_cpu_agnostic:
-          break
-      self.reap(spec.shortname, spec.cpu_cost)
-    if self.cancelled(): return False
-    job = Job(spec,
-              self._newline_on_success,
-              self._travis,
-              self._add_env,
-              self._quiet_success)
-    self._running.add(job)
-    if job.GetSpec().shortname not in self.resultset:
-      self.resultset[job.GetSpec().shortname] = []
-    return True
-
-  def reap(self, waiting_for=None, waiting_for_cost=None):
-    """Collect the dead jobs."""
-    while self._running:
-      dead = set()
-      for job in self._running:
-        st = eintr_be_gone(lambda: job.state())
-        if st == _RUNNING: continue
-        if st == _FAILURE or st == _KILLED:
-          self._failures += 1
-          if self._stop_on_failure:
-            self._cancelled = True
+
+    def reap(self, waiting_for=None, waiting_for_cost=None):
+        """Collect the dead jobs."""
+        while self._running:
+            dead = set()
             for job in self._running:
-              job.kill()
-        dead.add(job)
-        break
-      for job in dead:
-        self._completed += 1
-        if not self._quiet_success or job.result.state != 'PASSED':
-          self.resultset[job.GetSpec().shortname].append(job.result)
-        self._running.remove(job)
-      if dead: return
-      if not self._travis and platform_string() != 'windows':
-        rstr = '' if self._remaining is None else '%d queued, ' % self._remaining
-        if self._remaining is not None and self._completed > 0:
-          now = time.time()
-          sofar = now - self._start_time
-          remaining = sofar / self._completed * (self._remaining + len(self._running))
-          rstr = 'ETA %.1f sec; %s' % (remaining, rstr)
-        if waiting_for is not None:
-          wstr = ' next: %s @ %.2f cpu' % (waiting_for, waiting_for_cost)
-        else:
-          wstr = ''
-        message('WAITING', '%s%d jobs running, %d complete, %d failed (load %.2f)%s' % (
-            rstr, len(self._running), self._completed, self._failures, self.cpu_cost(), wstr))
-      if platform_string() == 'windows':
-        time.sleep(0.1)
-      else:
-        signal.alarm(10)
-        signal.pause()
-
-  def cancelled(self):
-    """Poll for cancellation."""
-    if self._cancelled: return True
-    if not self._check_cancelled(): return False
-    for job in self._running:
-      job.kill()
-    self._cancelled = True
-    return True
-
-  def finish(self):
-    while self._running:
-      if self.cancelled(): pass  # poll cancellation
-      self.reap()
-    if platform_string() != 'windows':
-      signal.alarm(0)
-    return not self.cancelled() and self._failures == 0
+                st = eintr_be_gone(lambda: job.state())
+                if st == _RUNNING: continue
+                if st == _FAILURE or st == _KILLED:
+                    self._failures += 1
+                    if self._stop_on_failure:
+                        self._cancelled = True
+                        for job in self._running:
+                            job.kill()
+                dead.add(job)
+                break
+            for job in dead:
+                self._completed += 1
+                if not self._quiet_success or job.result.state != 'PASSED':
+                    self.resultset[job.GetSpec().shortname].append(job.result)
+                self._running.remove(job)
+            if dead: return
+            if not self._travis and platform_string() != 'windows':
+                rstr = '' if self._remaining is None else '%d queued, ' % self._remaining
+                if self._remaining is not None and self._completed > 0:
+                    now = time.time()
+                    sofar = now - self._start_time
+                    remaining = sofar / self._completed * (
+                        self._remaining + len(self._running))
+                    rstr = 'ETA %.1f sec; %s' % (remaining, rstr)
+                if waiting_for is not None:
+                    wstr = ' next: %s @ %.2f cpu' % (waiting_for,
+                                                     waiting_for_cost)
+                else:
+                    wstr = ''
+                message(
+                    'WAITING',
+                    '%s%d jobs running, %d complete, %d failed (load %.2f)%s' %
+                    (rstr, len(self._running), self._completed, self._failures,
+                     self.cpu_cost(), wstr))
+            if platform_string() == 'windows':
+                time.sleep(0.1)
+            else:
+                signal.alarm(10)
+                signal.pause()
+
+    def cancelled(self):
+        """Poll for cancellation."""
+        if self._cancelled: return True
+        if not self._check_cancelled(): return False
+        for job in self._running:
+            job.kill()
+        self._cancelled = True
+        return True
+
+    def finish(self):
+        while self._running:
+            if self.cancelled(): pass  # poll cancellation
+            self.reap()
+        if platform_string() != 'windows':
+            signal.alarm(0)
+        return not self.cancelled() and self._failures == 0
 
 
 def _never_cancelled():
-  return False
+    return False
 
 
 def tag_remaining(xs):
-  staging = []
-  for x in xs:
-    staging.append(x)
-    if len(staging) > 5000:
-      yield (staging.pop(0), None)
-  n = len(staging)
-  for i, x in enumerate(staging):
-    yield (x, n - i - 1)
+    staging = []
+    for x in xs:
+        staging.append(x)
+        if len(staging) > 5000:
+            yield (staging.pop(0), None)
+    n = len(staging)
+    for i, x in enumerate(staging):
+        yield (x, n - i - 1)
 
 
 def run(cmdlines,
@@ -511,23 +548,23 @@ def run(cmdlines,
         skip_jobs=False,
         quiet_success=False,
         max_time=-1):
-  if skip_jobs:
-    resultset = {}
-    skipped_job_result = JobResult()
-    skipped_job_result.state = 'SKIPPED'
-    for job in cmdlines:
-      message('SKIPPED', job.shortname, do_newline=True)
-      resultset[job.shortname] = [skipped_job_result]
-    return 0, resultset
-  js = Jobset(check_cancelled,
-              maxjobs if maxjobs is not None else _DEFAULT_MAX_JOBS,
-              maxjobs_cpu_agnostic if maxjobs_cpu_agnostic is not None else _DEFAULT_MAX_JOBS,
-              newline_on_success, travis, stop_on_failure, add_env,
-              quiet_success, max_time)
-  for cmdline, remaining in tag_remaining(cmdlines):
-    if not js.start(cmdline):
-      break
-    if remaining is not None:
-      js.set_remaining(remaining)
-  js.finish()
-  return js.get_num_failures(), js.resultset
+    if skip_jobs:
+        resultset = {}
+        skipped_job_result = JobResult()
+        skipped_job_result.state = 'SKIPPED'
+        for job in cmdlines:
+            message('SKIPPED', job.shortname, do_newline=True)
+            resultset[job.shortname] = [skipped_job_result]
+        return 0, resultset
+    js = Jobset(check_cancelled, maxjobs if maxjobs is not None else
+                _DEFAULT_MAX_JOBS, maxjobs_cpu_agnostic
+                if maxjobs_cpu_agnostic is not None else _DEFAULT_MAX_JOBS,
+                newline_on_success, travis, stop_on_failure, add_env,
+                quiet_success, max_time)
+    for cmdline, remaining in tag_remaining(cmdlines):
+        if not js.start(cmdline):
+            break
+        if remaining is not None:
+            js.set_remaining(remaining)
+    js.finish()
+    return js.get_num_failures(), js.resultset
diff --git a/tools/run_tests/python_utils/port_server.py b/tools/run_tests/python_utils/port_server.py
index 4fb5ca0e94..83e09c09d0 100755
--- a/tools/run_tests/python_utils/port_server.py
+++ b/tools/run_tests/python_utils/port_server.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Manage TCP ports for unit tests; started by run_tests.py"""
 
 import argparse
@@ -27,17 +26,14 @@ from SocketServer import ThreadingMixIn
 import threading
 import platform
 
-
 # increment this number whenever making a change to ensure that
 # the changes are picked up by running CI servers
 # note that all changes must be backwards compatible
 _MY_VERSION = 20
 
-
 if len(sys.argv) == 2 and sys.argv[1] == 'dump_version':
-  print _MY_VERSION
-  sys.exit(0)
-
+    print _MY_VERSION
+    sys.exit(0)
 
 argp = argparse.ArgumentParser(description='Server for httpcli_test')
 argp.add_argument('-p', '--port', default=12345, type=int)
@@ -45,11 +41,11 @@ argp.add_argument('-l', '--logfile', default=None, type=str)
 args = argp.parse_args()
 
 if args.logfile is not None:
-  sys.stdin.close()
-  sys.stderr.close()
-  sys.stdout.close()
-  sys.stderr = open(args.logfile, 'w')
-  sys.stdout = sys.stderr
+    sys.stdin.close()
+    sys.stderr.close()
+    sys.stdout.close()
+    sys.stderr = open(args.logfile, 'w')
+    sys.stdout = sys.stderr
 
 print 'port server running on port %d' % args.port
 
@@ -57,67 +53,85 @@ pool = []
 in_use = {}
 mu = threading.Lock()
 
+# Cronet restricts the following ports to be used (see
+# https://cs.chromium.org/chromium/src/net/base/port_util.cc). When one of these
+# ports is used in a Cronet test, the test would fail (see issue #12149). These
+# ports must be excluded from pool.
+cronet_restricted_ports = [
+    1, 7, 9, 11, 13, 15, 17, 19, 20, 21, 22, 23, 25, 37, 42, 43, 53, 77, 79, 87,
+    95, 101, 102, 103, 104, 109, 110, 111, 113, 115, 117, 119, 123, 135, 139,
+    143, 179, 389, 465, 512, 513, 514, 515, 526, 530, 531, 532, 540, 556, 563,
+    587, 601, 636, 993, 995, 2049, 3659, 4045, 6000, 6665, 6666, 6667, 6668,
+    6669, 6697
+]
+
+
 def can_connect(port):
-  # this test is only really useful on unices where SO_REUSE_PORT is available
-  # so on Windows, where this test is expensive, skip it
-  if platform.system() == 'Windows': return False
-  s = socket.socket()
-  try:
-    s.connect(('localhost', port))
-    return True
-  except socket.error, e:
-    return False
-  finally:
-    s.close()
+    # this test is only really useful on unices where SO_REUSE_PORT is available
+    # so on Windows, where this test is expensive, skip it
+    if platform.system() == 'Windows': return False
+    s = socket.socket()
+    try:
+        s.connect(('localhost', port))
+        return True
+    except socket.error, e:
+        return False
+    finally:
+        s.close()
+
 
 def can_bind(port, proto):
-  s = socket.socket(proto, socket.SOCK_STREAM)
-  s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-  try:
-    s.bind(('localhost', port))
-    return True
-  except socket.error, e:
-    return False
-  finally:
-    s.close()
+    s = socket.socket(proto, socket.SOCK_STREAM)
+    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+    try:
+        s.bind(('localhost', port))
+        return True
+    except socket.error, e:
+        return False
+    finally:
+        s.close()
 
 
 def refill_pool(max_timeout, req):
-  """Scan for ports not marked for being in use"""
-  chk = list(range(1025, 32766))
-  random.shuffle(chk)
-  for i in chk:
-    if len(pool) > 100: break
-    if i in in_use:
-      age = time.time() - in_use[i]
-      if age < max_timeout:
-        continue
-      req.log_message("kill old request %d" % i)
-      del in_use[i]
-    if can_bind(i, socket.AF_INET) and can_bind(i, socket.AF_INET6) and not can_connect(i):
-      req.log_message("found available port %d" % i)
-      pool.append(i)
+    """Scan for ports not marked for being in use"""
+    chk = [
+        port for port in list(range(1025, 32766))
+        if port not in cronet_restricted_ports
+    ]
+    random.shuffle(chk)
+    for i in chk:
+        if len(pool) > 100: break
+        if i in in_use:
+            age = time.time() - in_use[i]
+            if age < max_timeout:
+                continue
+            req.log_message("kill old request %d" % i)
+            del in_use[i]
+        if can_bind(i, socket.AF_INET) and can_bind(
+                i, socket.AF_INET6) and not can_connect(i):
+            req.log_message("found available port %d" % i)
+            pool.append(i)
 
 
 def allocate_port(req):
-  global pool
-  global in_use
-  global mu
-  mu.acquire()
-  max_timeout = 600
-  while not pool:
-    refill_pool(max_timeout, req)
-    if not pool:
-      req.log_message("failed to find ports: retrying soon")
-      mu.release()
-      time.sleep(1)
-      mu.acquire()
-      max_timeout /= 2
-  port = pool[0]
-  pool = pool[1:]
-  in_use[port] = time.time()
-  mu.release()
-  return port
+    global pool
+    global in_use
+    global mu
+    mu.acquire()
+    max_timeout = 600
+    while not pool:
+        refill_pool(max_timeout, req)
+        if not pool:
+            req.log_message("failed to find ports: retrying soon")
+            mu.release()
+            time.sleep(1)
+            mu.acquire()
+            max_timeout /= 2
+    port = pool[0]
+    pool = pool[1:]
+    in_use[port] = time.time()
+    mu.release()
+    return port
 
 
 keep_running = True
@@ -125,61 +139,68 @@ keep_running = True
 
 class Handler(BaseHTTPRequestHandler):
 
-  def setup(self):
-    # If the client is unreachable for 5 seconds, close the connection
-    self.timeout = 5
-    BaseHTTPRequestHandler.setup(self)
+    def setup(self):
+        # If the client is unreachable for 5 seconds, close the connection
+        self.timeout = 5
+        BaseHTTPRequestHandler.setup(self)
+
+    def do_GET(self):
+        global keep_running
+        global mu
+        if self.path == '/get':
+            # allocate a new port, it will stay bound for ten minutes and until
+            # it's unused
+            self.send_response(200)
+            self.send_header('Content-Type', 'text/plain')
+            self.end_headers()
+            p = allocate_port(self)
+            self.log_message('allocated port %d' % p)
+            self.wfile.write('%d' % p)
+        elif self.path[0:6] == '/drop/':
+            self.send_response(200)
+            self.send_header('Content-Type', 'text/plain')
+            self.end_headers()
+            p = int(self.path[6:])
+            mu.acquire()
+            if p in in_use:
+                del in_use[p]
+                pool.append(p)
+                k = 'known'
+            else:
+                k = 'unknown'
+            mu.release()
+            self.log_message('drop %s port %d' % (k, p))
+        elif self.path == '/version_number':
+            # fetch a version string and the current process pid
+            self.send_response(200)
+            self.send_header('Content-Type', 'text/plain')
+            self.end_headers()
+            self.wfile.write(_MY_VERSION)
+        elif self.path == '/dump':
+            # yaml module is not installed on Macs and Windows machines by default
+            # so we import it lazily (/dump action is only used for debugging)
+            import yaml
+            self.send_response(200)
+            self.send_header('Content-Type', 'text/plain')
+            self.end_headers()
+            mu.acquire()
+            now = time.time()
+            out = yaml.dump({
+                'pool':
+                pool,
+                'in_use':
+                dict((k, now - v) for k, v in in_use.items())
+            })
+            mu.release()
+            self.wfile.write(out)
+        elif self.path == '/quitquitquit':
+            self.send_response(200)
+            self.end_headers()
+            self.server.shutdown()
 
-  def do_GET(self):
-    global keep_running
-    global mu
-    if self.path == '/get':
-      # allocate a new port, it will stay bound for ten minutes and until
-      # it's unused
-      self.send_response(200)
-      self.send_header('Content-Type', 'text/plain')
-      self.end_headers()
-      p = allocate_port(self)
-      self.log_message('allocated port %d' % p)
-      self.wfile.write('%d' % p)
-    elif self.path[0:6] == '/drop/':
-      self.send_response(200)
-      self.send_header('Content-Type', 'text/plain')
-      self.end_headers()
-      p = int(self.path[6:])
-      mu.acquire()
-      if p in in_use:
-        del in_use[p]
-        pool.append(p)
-        k = 'known'
-      else:
-        k = 'unknown'
-      mu.release()
-      self.log_message('drop %s port %d' % (k, p))
-    elif self.path == '/version_number':
-      # fetch a version string and the current process pid
-      self.send_response(200)
-      self.send_header('Content-Type', 'text/plain')
-      self.end_headers()
-      self.wfile.write(_MY_VERSION)
-    elif self.path == '/dump':
-      # yaml module is not installed on Macs and Windows machines by default
-      # so we import it lazily (/dump action is only used for debugging)
-      import yaml
-      self.send_response(200)
-      self.send_header('Content-Type', 'text/plain')
-      self.end_headers()
-      mu.acquire()
-      now = time.time()
-      out = yaml.dump({'pool': pool, 'in_use': dict((k, now - v) for k, v in in_use.items())})
-      mu.release()
-      self.wfile.write(out)
-    elif self.path == '/quitquitquit':
-      self.send_response(200)
-      self.end_headers()
-      self.server.shutdown()
 
 class ThreadedHTTPServer(ThreadingMixIn, HTTPServer):
-  """Handle requests in a separate thread"""
+    """Handle requests in a separate thread"""
+
 
 ThreadedHTTPServer(('', args.port), Handler).serve_forever()
diff --git a/tools/run_tests/python_utils/report_utils.py b/tools/run_tests/python_utils/report_utils.py
index a3867808b5..e4fddb8a7d 100644
--- a/tools/run_tests/python_utils/report_utils.py
+++ b/tools/run_tests/python_utils/report_utils.py
@@ -11,17 +11,16 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Generate XML and HTML test reports."""
 
 from __future__ import print_function
 
 try:
-  from mako.runtime import Context
-  from mako.template import Template
-  from mako import exceptions
+    from mako.runtime import Context
+    from mako.template import Template
+    from mako import exceptions
 except (ImportError):
-  pass  # Mako not installed but it is ok.
+    pass  # Mako not installed but it is ok.
 import datetime
 import os
 import string
@@ -30,111 +29,127 @@ import six
 
 
 def _filter_msg(msg, output_format):
-  """Filters out nonprintable and illegal characters from the message."""
-  if output_format in ['XML', 'HTML']:
-    # keep whitespaces but remove formfeed and vertical tab characters
-    # that make XML report unparseable.
-    filtered_msg = filter(
-        lambda x: x in string.printable and x != '\f' and x != '\v',
-        msg.decode('UTF-8', 'ignore'))
-    if output_format == 'HTML':
-      filtered_msg = filtered_msg.replace('"', '&quot;')
-    return filtered_msg
-  else:
-    return msg
+    """Filters out nonprintable and illegal characters from the message."""
+    if output_format in ['XML', 'HTML']:
+        # keep whitespaces but remove formfeed and vertical tab characters
+        # that make XML report unparseable.
+        filtered_msg = filter(
+            lambda x: x in string.printable and x != '\f' and x != '\v',
+            msg.decode('UTF-8', 'ignore'))
+        if output_format == 'HTML':
+            filtered_msg = filtered_msg.replace('"', '&quot;')
+        return filtered_msg
+    else:
+        return msg
 
 
 def new_junit_xml_tree():
-  return ET.ElementTree(ET.Element('testsuites'))
+    return ET.ElementTree(ET.Element('testsuites'))
+
 
-def render_junit_xml_report(resultset, report_file, suite_package='grpc',
+def render_junit_xml_report(resultset,
+                            report_file,
+                            suite_package='grpc',
                             suite_name='tests'):
-  """Generate JUnit-like XML report."""
-  tree = new_junit_xml_tree()
-  append_junit_xml_results(tree, resultset, suite_package, suite_name, '1')
-  create_xml_report_file(tree, report_file)
+    """Generate JUnit-like XML report."""
+    tree = new_junit_xml_tree()
+    append_junit_xml_results(tree, resultset, suite_package, suite_name, '1')
+    create_xml_report_file(tree, report_file)
+
 
 def create_xml_report_file(tree, report_file):
-  """Generate JUnit-like report file from xml tree ."""
-  # ensure the report directory exists
-  report_dir = os.path.dirname(os.path.abspath(report_file))
-  if not os.path.exists(report_dir):
-    os.makedirs(report_dir)
-  tree.write(report_file, encoding='UTF-8')
+    """Generate JUnit-like report file from xml tree ."""
+    # ensure the report directory exists
+    report_dir = os.path.dirname(os.path.abspath(report_file))
+    if not os.path.exists(report_dir):
+        os.makedirs(report_dir)
+    tree.write(report_file, encoding='UTF-8')
+
 
 def append_junit_xml_results(tree, resultset, suite_package, suite_name, id):
-  """Append a JUnit-like XML report tree with test results as a new suite."""
-  testsuite = ET.SubElement(tree.getroot(), 'testsuite',
-                            id=id, package=suite_package, name=suite_name,
-                            timestamp=datetime.datetime.now().isoformat())
-  failure_count  = 0
-  error_count = 0
-  for shortname, results in six.iteritems(resultset):
-    for result in results:
-      xml_test = ET.SubElement(testsuite, 'testcase', name=shortname)
-      if result.elapsed_time:
-        xml_test.set('time', str(result.elapsed_time))
-      filtered_msg =  _filter_msg(result.message, 'XML')
-      if result.state == 'FAILED':
-        ET.SubElement(xml_test, 'failure', message='Failure').text = filtered_msg
-        failure_count += 1
-      elif result.state == 'TIMEOUT':
-        ET.SubElement(xml_test, 'error', message='Timeout').text = filtered_msg
-        error_count += 1
-      elif result.state == 'SKIPPED':
-        ET.SubElement(xml_test, 'skipped', message='Skipped')
-  testsuite.set('failures', str(failure_count))
-  testsuite.set('errors', str(error_count))
-
-def render_interop_html_report(
-  client_langs, server_langs, test_cases, auth_test_cases, http2_cases,
-  http2_server_cases, resultset,
-  num_failures, cloud_to_prod, prod_servers, http2_interop):
-  """Generate HTML report for interop tests."""
-  template_file = 'tools/run_tests/interop/interop_html_report.template'
-  try:
-    mytemplate = Template(filename=template_file, format_exceptions=True)
-  except NameError:
-    print('Mako template is not installed. Skipping HTML report generation.')
-    return
-  except IOError as e:
-    print('Failed to find the template %s: %s' % (template_file, e))
-    return
-
-  sorted_test_cases = sorted(test_cases)
-  sorted_auth_test_cases = sorted(auth_test_cases)
-  sorted_http2_cases = sorted(http2_cases)
-  sorted_http2_server_cases = sorted(http2_server_cases)
-  sorted_client_langs = sorted(client_langs)
-  sorted_server_langs = sorted(server_langs)
-  sorted_prod_servers = sorted(prod_servers)
-
-  args = {'client_langs': sorted_client_langs,
-          'server_langs': sorted_server_langs,
-          'test_cases': sorted_test_cases,
-          'auth_test_cases': sorted_auth_test_cases,
-          'http2_cases': sorted_http2_cases,
-          'http2_server_cases': sorted_http2_server_cases,
-          'resultset': resultset,
-          'num_failures': num_failures,
-          'cloud_to_prod': cloud_to_prod,
-          'prod_servers': sorted_prod_servers,
-          'http2_interop': http2_interop}
-
-  html_report_out_dir = 'reports'
-  if not os.path.exists(html_report_out_dir):
-    os.mkdir(html_report_out_dir)
-  html_file_path = os.path.join(html_report_out_dir, 'index.html')
-  try:
-    with open(html_file_path, 'w') as output_file:
-      mytemplate.render_context(Context(output_file, **args))
-  except:
-    print(exceptions.text_error_template().render())
-    raise
+    """Append a JUnit-like XML report tree with test results as a new suite."""
+    testsuite = ET.SubElement(
+        tree.getroot(),
+        'testsuite',
+        id=id,
+        package=suite_package,
+        name=suite_name,
+        timestamp=datetime.datetime.now().isoformat())
+    failure_count = 0
+    error_count = 0
+    for shortname, results in six.iteritems(resultset):
+        for result in results:
+            xml_test = ET.SubElement(testsuite, 'testcase', name=shortname)
+            if result.elapsed_time:
+                xml_test.set('time', str(result.elapsed_time))
+            filtered_msg = _filter_msg(result.message, 'XML')
+            if result.state == 'FAILED':
+                ET.SubElement(
+                    xml_test, 'failure', message='Failure').text = filtered_msg
+                failure_count += 1
+            elif result.state == 'TIMEOUT':
+                ET.SubElement(
+                    xml_test, 'error', message='Timeout').text = filtered_msg
+                error_count += 1
+            elif result.state == 'SKIPPED':
+                ET.SubElement(xml_test, 'skipped', message='Skipped')
+    testsuite.set('failures', str(failure_count))
+    testsuite.set('errors', str(error_count))
+
+
+def render_interop_html_report(client_langs, server_langs, test_cases,
+                               auth_test_cases, http2_cases, http2_server_cases,
+                               resultset, num_failures, cloud_to_prod,
+                               prod_servers, http2_interop):
+    """Generate HTML report for interop tests."""
+    template_file = 'tools/run_tests/interop/interop_html_report.template'
+    try:
+        mytemplate = Template(filename=template_file, format_exceptions=True)
+    except NameError:
+        print(
+            'Mako template is not installed. Skipping HTML report generation.')
+        return
+    except IOError as e:
+        print('Failed to find the template %s: %s' % (template_file, e))
+        return
+
+    sorted_test_cases = sorted(test_cases)
+    sorted_auth_test_cases = sorted(auth_test_cases)
+    sorted_http2_cases = sorted(http2_cases)
+    sorted_http2_server_cases = sorted(http2_server_cases)
+    sorted_client_langs = sorted(client_langs)
+    sorted_server_langs = sorted(server_langs)
+    sorted_prod_servers = sorted(prod_servers)
+
+    args = {
+        'client_langs': sorted_client_langs,
+        'server_langs': sorted_server_langs,
+        'test_cases': sorted_test_cases,
+        'auth_test_cases': sorted_auth_test_cases,
+        'http2_cases': sorted_http2_cases,
+        'http2_server_cases': sorted_http2_server_cases,
+        'resultset': resultset,
+        'num_failures': num_failures,
+        'cloud_to_prod': cloud_to_prod,
+        'prod_servers': sorted_prod_servers,
+        'http2_interop': http2_interop
+    }
+
+    html_report_out_dir = 'reports'
+    if not os.path.exists(html_report_out_dir):
+        os.mkdir(html_report_out_dir)
+    html_file_path = os.path.join(html_report_out_dir, 'index.html')
+    try:
+        with open(html_file_path, 'w') as output_file:
+            mytemplate.render_context(Context(output_file, **args))
+    except:
+        print(exceptions.text_error_template().render())
+        raise
+
 
 def render_perf_profiling_results(output_filepath, profile_names):
-  with open(output_filepath, 'w') as output_file:
-    output_file.write('<ul>\n')
-    for name in profile_names:
-      output_file.write('<li><a href=%s>%s</a></li>\n' % (name, name))
-    output_file.write('</ul>\n')
+    with open(output_filepath, 'w') as output_file:
+        output_file.write('<ul>\n')
+        for name in profile_names:
+            output_file.write('<li><a href=%s>%s</a></li>\n' % (name, name))
+        output_file.write('</ul>\n')
diff --git a/tools/run_tests/python_utils/start_port_server.py b/tools/run_tests/python_utils/start_port_server.py
index 786103ccdf..5572cdcfe7 100644
--- a/tools/run_tests/python_utils/start_port_server.py
+++ b/tools/run_tests/python_utils/start_port_server.py
@@ -22,10 +22,10 @@ import sys
 import tempfile
 import time
 
-
 # must be synchronized with test/core/utils/port_server_client.h
 _PORT_SERVER_PORT = 32766
 
+
 def start_port_server():
     # check if a compatible port server is running
     # if incompatible (version mismatch) ==> start a new one
@@ -33,9 +33,8 @@ def start_port_server():
     # otherwise, leave it up
     try:
         version = int(
-            urllib.urlopen(
-                'http://localhost:%d/version_number' %
-                _PORT_SERVER_PORT).read())
+            urllib.urlopen('http://localhost:%d/version_number' %
+                           _PORT_SERVER_PORT).read())
         logging.info('detected port server running version %d', version)
         running = True
     except Exception as e:
@@ -92,8 +91,8 @@ def start_port_server():
                 # try one final time: maybe another build managed to start one
                 time.sleep(1)
                 try:
-                    urllib.urlopen(
-                        'http://localhost:%d/get' % _PORT_SERVER_PORT).read()
+                    urllib.urlopen('http://localhost:%d/get' %
+                                   _PORT_SERVER_PORT).read()
                     logging.info(
                         'last ditch attempt to contact port server succeeded')
                     break
diff --git a/tools/run_tests/python_utils/upload_test_results.py b/tools/run_tests/python_utils/upload_test_results.py
index ea97bc0aec..9eb8e2a862 100644
--- a/tools/run_tests/python_utils/upload_test_results.py
+++ b/tools/run_tests/python_utils/upload_test_results.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Helper to upload Jenkins test results to BQ"""
 
 from __future__ import print_function
@@ -23,8 +22,8 @@ import sys
 import time
 import uuid
 
-gcp_utils_dir = os.path.abspath(os.path.join(
-    os.path.dirname(__file__), '../../gcp/utils'))
+gcp_utils_dir = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), '../../gcp/utils'))
 sys.path.append(gcp_utils_dir)
 import big_query_utils
 
@@ -35,55 +34,57 @@ _EXPIRATION_MS = 90 * 24 * 60 * 60 * 1000
 _PARTITION_TYPE = 'DAY'
 _PROJECT_ID = 'grpc-testing'
 _RESULTS_SCHEMA = [
-  ('job_name', 'STRING', 'Name of Jenkins job'),
-  ('build_id', 'INTEGER', 'Build ID of Jenkins job'),
-  ('build_url', 'STRING', 'URL of Jenkins job'),
-  ('test_name', 'STRING', 'Individual test name'),
-  ('language', 'STRING', 'Language of test'),
-  ('platform', 'STRING', 'Platform used for test'),
-  ('config', 'STRING', 'Config used for test'),
-  ('compiler', 'STRING', 'Compiler used for test'),
-  ('iomgr_platform', 'STRING', 'Iomgr used for test'),
-  ('result', 'STRING', 'Test result: PASSED, TIMEOUT, FAILED, or SKIPPED'),
-  ('timestamp', 'TIMESTAMP', 'Timestamp of test run'),
-  ('elapsed_time', 'FLOAT', 'How long test took to run'),
-  ('cpu_estimated', 'FLOAT', 'Estimated CPU usage of test'),
-  ('cpu_measured', 'FLOAT', 'Actual CPU usage of test'),
-  ('return_code', 'INTEGER', 'Exit code of test'),
+    ('job_name', 'STRING', 'Name of Jenkins job'),
+    ('build_id', 'INTEGER', 'Build ID of Jenkins job'),
+    ('build_url', 'STRING', 'URL of Jenkins job'),
+    ('test_name', 'STRING', 'Individual test name'),
+    ('language', 'STRING', 'Language of test'),
+    ('platform', 'STRING', 'Platform used for test'),
+    ('config', 'STRING', 'Config used for test'),
+    ('compiler', 'STRING', 'Compiler used for test'),
+    ('iomgr_platform', 'STRING', 'Iomgr used for test'),
+    ('result', 'STRING', 'Test result: PASSED, TIMEOUT, FAILED, or SKIPPED'),
+    ('timestamp', 'TIMESTAMP', 'Timestamp of test run'),
+    ('elapsed_time', 'FLOAT', 'How long test took to run'),
+    ('cpu_estimated', 'FLOAT', 'Estimated CPU usage of test'),
+    ('cpu_measured', 'FLOAT', 'Actual CPU usage of test'),
+    ('return_code', 'INTEGER', 'Exit code of test'),
 ]
 _INTEROP_RESULTS_SCHEMA = [
-  ('job_name', 'STRING', 'Name of Jenkins/Kokoro job'),
-  ('build_id', 'INTEGER', 'Build ID of Jenkins/Kokoro job'),
-  ('build_url', 'STRING', 'URL of Jenkins/Kokoro job'),
-  ('test_name', 'STRING', 'Unique test name combining client, server, and test_name'),
-  ('suite', 'STRING', 'Test suite: cloud_to_cloud, cloud_to_prod, or cloud_to_prod_auth'),
-  ('client', 'STRING', 'Client language'),
-  ('server', 'STRING', 'Server host name'),
-  ('test_case', 'STRING', 'Name of test case'),
-  ('result', 'STRING', 'Test result: PASSED, TIMEOUT, FAILED, or SKIPPED'),
-  ('timestamp', 'TIMESTAMP', 'Timestamp of test run'),
-  ('elapsed_time', 'FLOAT', 'How long test took to run'),
+    ('job_name', 'STRING', 'Name of Jenkins/Kokoro job'),
+    ('build_id', 'INTEGER', 'Build ID of Jenkins/Kokoro job'),
+    ('build_url', 'STRING', 'URL of Jenkins/Kokoro job'),
+    ('test_name', 'STRING',
+     'Unique test name combining client, server, and test_name'),
+    ('suite', 'STRING',
+     'Test suite: cloud_to_cloud, cloud_to_prod, or cloud_to_prod_auth'),
+    ('client', 'STRING', 'Client language'),
+    ('server', 'STRING', 'Server host name'),
+    ('test_case', 'STRING', 'Name of test case'),
+    ('result', 'STRING', 'Test result: PASSED, TIMEOUT, FAILED, or SKIPPED'),
+    ('timestamp', 'TIMESTAMP', 'Timestamp of test run'),
+    ('elapsed_time', 'FLOAT', 'How long test took to run'),
 ]
 
 
 def _get_build_metadata(test_results):
-  """Add Jenkins/Kokoro build metadata to test_results based on environment
+    """Add Jenkins/Kokoro build metadata to test_results based on environment
   variables set by Jenkins/Kokoro.
   """
-  build_id = os.getenv('BUILD_ID') or os.getenv('KOKORO_BUILD_NUMBER')
-  build_url = os.getenv('BUILD_URL') or os.getenv('KOKORO_BUILD_URL')
-  job_name = os.getenv('JOB_BASE_NAME') or os.getenv('KOKORO_JOB_NAME')
+    build_id = os.getenv('BUILD_ID') or os.getenv('KOKORO_BUILD_NUMBER')
+    build_url = os.getenv('BUILD_URL') or os.getenv('KOKORO_BUILD_URL')
+    job_name = os.getenv('JOB_BASE_NAME') or os.getenv('KOKORO_JOB_NAME')
 
-  if build_id:
-    test_results['build_id'] = build_id
-  if build_url:
-    test_results['build_url'] = build_url
-  if job_name:
-    test_results['job_name'] = job_name
+    if build_id:
+        test_results['build_id'] = build_id
+    if build_url:
+        test_results['build_url'] = build_url
+    if job_name:
+        test_results['job_name'] = job_name
 
 
 def upload_results_to_bq(resultset, bq_table, args, platform):
-  """Upload test results to a BQ table.
+    """Upload test results to a BQ table.
 
   Args:
       resultset: dictionary generated by jobset.run
@@ -91,77 +92,97 @@ def upload_results_to_bq(resultset, bq_table, args, platform):
       args: args in run_tests.py, generated by argparse
       platform: string name of platform tests were run on
   """
-  bq = big_query_utils.create_big_query()
-  big_query_utils.create_partitioned_table(bq, _PROJECT_ID, _DATASET_ID, bq_table, _RESULTS_SCHEMA, _DESCRIPTION,
-                                           partition_type=_PARTITION_TYPE, expiration_ms= _EXPIRATION_MS)
-
-  for shortname, results in six.iteritems(resultset):
-    for result in results:
-      test_results = {}
-      _get_build_metadata(test_results)
-      test_results['compiler'] = args.compiler
-      test_results['config'] = args.config
-      test_results['cpu_estimated'] = result.cpu_estimated
-      test_results['cpu_measured'] = result.cpu_measured
-      test_results['elapsed_time'] = '%.2f' % result.elapsed_time
-      test_results['iomgr_platform'] = args.iomgr_platform
-      # args.language is a list, but will always have one element in the contexts
-      # this function is used.
-      test_results['language'] = args.language[0]
-      test_results['platform'] = platform
-      test_results['result'] = result.state
-      test_results['return_code'] = result.returncode
-      test_results['test_name'] = shortname
-      test_results['timestamp'] = time.strftime('%Y-%m-%d %H:%M:%S')
-
-      row = big_query_utils.make_row(str(uuid.uuid4()), test_results)
-
-      # TODO(jtattermusch): rows are inserted one by one, very inefficient
-      max_retries = 3
-      for attempt in range(max_retries):
-        if big_query_utils.insert_rows(bq, _PROJECT_ID, _DATASET_ID, bq_table, [row]):
-          break
-        else:
-          if attempt < max_retries - 1:
-            print('Error uploading result to bigquery, will retry.')
-          else:
-            print('Error uploading result to bigquery, all attempts failed.')
-            sys.exit(1)
+    bq = big_query_utils.create_big_query()
+    big_query_utils.create_partitioned_table(
+        bq,
+        _PROJECT_ID,
+        _DATASET_ID,
+        bq_table,
+        _RESULTS_SCHEMA,
+        _DESCRIPTION,
+        partition_type=_PARTITION_TYPE,
+        expiration_ms=_EXPIRATION_MS)
+
+    for shortname, results in six.iteritems(resultset):
+        for result in results:
+            test_results = {}
+            _get_build_metadata(test_results)
+            test_results['compiler'] = args.compiler
+            test_results['config'] = args.config
+            test_results['cpu_estimated'] = result.cpu_estimated
+            test_results['cpu_measured'] = result.cpu_measured
+            test_results['elapsed_time'] = '%.2f' % result.elapsed_time
+            test_results['iomgr_platform'] = args.iomgr_platform
+            # args.language is a list, but will always have one element in the contexts
+            # this function is used.
+            test_results['language'] = args.language[0]
+            test_results['platform'] = platform
+            test_results['result'] = result.state
+            test_results['return_code'] = result.returncode
+            test_results['test_name'] = shortname
+            test_results['timestamp'] = time.strftime('%Y-%m-%d %H:%M:%S')
+
+            row = big_query_utils.make_row(str(uuid.uuid4()), test_results)
+
+            # TODO(jtattermusch): rows are inserted one by one, very inefficient
+            max_retries = 3
+            for attempt in range(max_retries):
+                if big_query_utils.insert_rows(bq, _PROJECT_ID, _DATASET_ID,
+                                               bq_table, [row]):
+                    break
+                else:
+                    if attempt < max_retries - 1:
+                        print('Error uploading result to bigquery, will retry.')
+                    else:
+                        print(
+                            'Error uploading result to bigquery, all attempts failed.'
+                        )
+                        sys.exit(1)
 
 
 def upload_interop_results_to_bq(resultset, bq_table, args):
-  """Upload interop test results to a BQ table.
+    """Upload interop test results to a BQ table.
 
   Args:
       resultset: dictionary generated by jobset.run
       bq_table: string name of table to create/upload results to in BQ
       args: args in run_interop_tests.py, generated by argparse
   """
-  bq = big_query_utils.create_big_query()
-  big_query_utils.create_partitioned_table(bq, _PROJECT_ID, _DATASET_ID, bq_table, _INTEROP_RESULTS_SCHEMA, _DESCRIPTION,
-                                           partition_type=_PARTITION_TYPE, expiration_ms= _EXPIRATION_MS)
-
-  for shortname, results in six.iteritems(resultset):
-    for result in results:
-      test_results = {}
-      _get_build_metadata(test_results)
-      test_results['elapsed_time'] = '%.2f' % result.elapsed_time
-      test_results['result'] = result.state
-      test_results['test_name'] = shortname
-      test_results['suite'] = shortname.split(':')[0]
-      test_results['client'] = shortname.split(':')[1]
-      test_results['server'] = shortname.split(':')[2]
-      test_results['test_case'] = shortname.split(':')[3]
-      test_results['timestamp'] = time.strftime('%Y-%m-%d %H:%M:%S')
-      row = big_query_utils.make_row(str(uuid.uuid4()), test_results)
-      # TODO(jtattermusch): rows are inserted one by one, very inefficient
-      max_retries = 3
-      for attempt in range(max_retries):
-        if big_query_utils.insert_rows(bq, _PROJECT_ID, _DATASET_ID, bq_table, [row]):
-          break
-        else:
-          if attempt < max_retries - 1:
-            print('Error uploading result to bigquery, will retry.')
-          else:
-            print('Error uploading result to bigquery, all attempts failed.')
-            sys.exit(1)
+    bq = big_query_utils.create_big_query()
+    big_query_utils.create_partitioned_table(
+        bq,
+        _PROJECT_ID,
+        _DATASET_ID,
+        bq_table,
+        _INTEROP_RESULTS_SCHEMA,
+        _DESCRIPTION,
+        partition_type=_PARTITION_TYPE,
+        expiration_ms=_EXPIRATION_MS)
+
+    for shortname, results in six.iteritems(resultset):
+        for result in results:
+            test_results = {}
+            _get_build_metadata(test_results)
+            test_results['elapsed_time'] = '%.2f' % result.elapsed_time
+            test_results['result'] = result.state
+            test_results['test_name'] = shortname
+            test_results['suite'] = shortname.split(':')[0]
+            test_results['client'] = shortname.split(':')[1]
+            test_results['server'] = shortname.split(':')[2]
+            test_results['test_case'] = shortname.split(':')[3]
+            test_results['timestamp'] = time.strftime('%Y-%m-%d %H:%M:%S')
+            row = big_query_utils.make_row(str(uuid.uuid4()), test_results)
+            # TODO(jtattermusch): rows are inserted one by one, very inefficient
+            max_retries = 3
+            for attempt in range(max_retries):
+                if big_query_utils.insert_rows(bq, _PROJECT_ID, _DATASET_ID,
+                                               bq_table, [row]):
+                    break
+                else:
+                    if attempt < max_retries - 1:
+                        print('Error uploading result to bigquery, will retry.')
+                    else:
+                        print(
+                            'Error uploading result to bigquery, all attempts failed.'
+                        )
+                        sys.exit(1)
diff --git a/tools/run_tests/python_utils/watch_dirs.py b/tools/run_tests/python_utils/watch_dirs.py
index 7bd085efaf..d2ad303a07 100755
--- a/tools/run_tests/python_utils/watch_dirs.py
+++ b/tools/run_tests/python_utils/watch_dirs.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Helper to watch a (set) of directories for modifications."""
 
 import os
@@ -19,42 +18,42 @@ import time
 
 
 class DirWatcher(object):
-  """Helper to watch a (set) of directories for modifications."""
-
-  def __init__(self, paths):
-    if isinstance(paths, basestring):
-      paths = [paths]
-    self._done = False
-    self.paths = list(paths)
-    self.lastrun = time.time()
-    self._cache = self._calculate()
-
-  def _calculate(self):
-    """Walk over all subscribed paths, check most recent mtime."""
-    most_recent_change = None
-    for path in self.paths:
-      if not os.path.exists(path):
-        continue
-      if not os.path.isdir(path):
-        continue
-      for root, _, files in os.walk(path):
-        for f in files:
-          if f and f[0] == '.': continue
-          try:
-            st = os.stat(os.path.join(root, f))
-          except OSError as e:
-            if e.errno == os.errno.ENOENT:
-              continue
-            raise
-          if most_recent_change is None:
-            most_recent_change = st.st_mtime
-          else:
-            most_recent_change = max(most_recent_change, st.st_mtime)
-    return most_recent_change
-
-  def most_recent_change(self):
-    if time.time() - self.lastrun > 1:
-      self._cache = self._calculate()
-      self.lastrun = time.time()
-    return self._cache
-
+    """Helper to watch a (set) of directories for modifications."""
+
+    def __init__(self, paths):
+        if isinstance(paths, basestring):
+            paths = [paths]
+        self._done = False
+        self.paths = list(paths)
+        self.lastrun = time.time()
+        self._cache = self._calculate()
+
+    def _calculate(self):
+        """Walk over all subscribed paths, check most recent mtime."""
+        most_recent_change = None
+        for path in self.paths:
+            if not os.path.exists(path):
+                continue
+            if not os.path.isdir(path):
+                continue
+            for root, _, files in os.walk(path):
+                for f in files:
+                    if f and f[0] == '.': continue
+                    try:
+                        st = os.stat(os.path.join(root, f))
+                    except OSError as e:
+                        if e.errno == os.errno.ENOENT:
+                            continue
+                        raise
+                    if most_recent_change is None:
+                        most_recent_change = st.st_mtime
+                    else:
+                        most_recent_change = max(most_recent_change,
+                                                 st.st_mtime)
+        return most_recent_change
+
+    def most_recent_change(self):
+        if time.time() - self.lastrun > 1:
+            self._cache = self._calculate()
+            self.lastrun = time.time()
+        return self._cache
diff --git a/tools/run_tests/run_build_statistics.py b/tools/run_tests/run_build_statistics.py
index 1e957b6677..4af00a47a6 100755
--- a/tools/run_tests/run_build_statistics.py
+++ b/tools/run_tests/run_build_statistics.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Tool to get build statistics from Jenkins and upload to BigQuery."""
 
 from __future__ import print_function
@@ -27,39 +26,38 @@ import re
 import sys
 import urllib
 
-
-gcp_utils_dir = os.path.abspath(os.path.join(
-    os.path.dirname(__file__), '../gcp/utils'))
+gcp_utils_dir = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), '../gcp/utils'))
 sys.path.append(gcp_utils_dir)
 import big_query_utils
 
-
 _PROJECT_ID = 'grpc-testing'
 _HAS_MATRIX = True
-_BUILDS = {'gRPC_interop_master': not _HAS_MATRIX,
-           'gRPC_master_linux': not _HAS_MATRIX,
-           'gRPC_master_macos': not _HAS_MATRIX,
-           'gRPC_master_windows': not _HAS_MATRIX,
-           'gRPC_performance_master': not _HAS_MATRIX,
-           'gRPC_portability_master_linux': not _HAS_MATRIX,
-           'gRPC_portability_master_windows': not _HAS_MATRIX,
-           'gRPC_master_asanitizer_c': not _HAS_MATRIX,
-           'gRPC_master_asanitizer_cpp': not _HAS_MATRIX,
-           'gRPC_master_msan_c': not _HAS_MATRIX,
-           'gRPC_master_tsanitizer_c': not _HAS_MATRIX,
-           'gRPC_master_tsan_cpp': not _HAS_MATRIX,
-           'gRPC_interop_pull_requests': not _HAS_MATRIX,
-           'gRPC_performance_pull_requests': not _HAS_MATRIX,
-           'gRPC_portability_pull_requests_linux': not _HAS_MATRIX,
-           'gRPC_portability_pr_win': not _HAS_MATRIX,
-           'gRPC_pull_requests_linux': not _HAS_MATRIX,
-           'gRPC_pull_requests_macos': not _HAS_MATRIX,
-           'gRPC_pr_win': not _HAS_MATRIX,
-           'gRPC_pull_requests_asan_c': not _HAS_MATRIX,
-           'gRPC_pull_requests_asan_cpp': not _HAS_MATRIX,
-           'gRPC_pull_requests_msan_c': not _HAS_MATRIX,
-           'gRPC_pull_requests_tsan_c': not _HAS_MATRIX,
-           'gRPC_pull_requests_tsan_cpp': not _HAS_MATRIX,
+_BUILDS = {
+    'gRPC_interop_master': not _HAS_MATRIX,
+    'gRPC_master_linux': not _HAS_MATRIX,
+    'gRPC_master_macos': not _HAS_MATRIX,
+    'gRPC_master_windows': not _HAS_MATRIX,
+    'gRPC_performance_master': not _HAS_MATRIX,
+    'gRPC_portability_master_linux': not _HAS_MATRIX,
+    'gRPC_portability_master_windows': not _HAS_MATRIX,
+    'gRPC_master_asanitizer_c': not _HAS_MATRIX,
+    'gRPC_master_asanitizer_cpp': not _HAS_MATRIX,
+    'gRPC_master_msan_c': not _HAS_MATRIX,
+    'gRPC_master_tsanitizer_c': not _HAS_MATRIX,
+    'gRPC_master_tsan_cpp': not _HAS_MATRIX,
+    'gRPC_interop_pull_requests': not _HAS_MATRIX,
+    'gRPC_performance_pull_requests': not _HAS_MATRIX,
+    'gRPC_portability_pull_requests_linux': not _HAS_MATRIX,
+    'gRPC_portability_pr_win': not _HAS_MATRIX,
+    'gRPC_pull_requests_linux': not _HAS_MATRIX,
+    'gRPC_pull_requests_macos': not _HAS_MATRIX,
+    'gRPC_pr_win': not _HAS_MATRIX,
+    'gRPC_pull_requests_asan_c': not _HAS_MATRIX,
+    'gRPC_pull_requests_asan_cpp': not _HAS_MATRIX,
+    'gRPC_pull_requests_msan_c': not _HAS_MATRIX,
+    'gRPC_pull_requests_tsan_c': not _HAS_MATRIX,
+    'gRPC_pull_requests_tsan_cpp': not _HAS_MATRIX,
 }
 _URL_BASE = 'https://grpc-testing.appspot.com/job'
 
@@ -99,147 +97,155 @@ _DATASET_ID = 'build_statistics'
 
 
 def _scrape_for_known_errors(html):
-  error_list = []
-  for known_error in _KNOWN_ERRORS:
-    errors = re.findall(known_error, html)
-    this_error_count = len(errors)
-    if this_error_count > 0: 
-      error_list.append({'description': known_error,
-                         'count': this_error_count})
-      print('====> %d failures due to %s' % (this_error_count, known_error))
-  return error_list
+    error_list = []
+    for known_error in _KNOWN_ERRORS:
+        errors = re.findall(known_error, html)
+        this_error_count = len(errors)
+        if this_error_count > 0:
+            error_list.append({
+                'description': known_error,
+                'count': this_error_count
+            })
+            print('====> %d failures due to %s' %
+                  (this_error_count, known_error))
+    return error_list
 
 
 def _no_report_files_found(html):
-  return _NO_REPORT_FILES_FOUND_ERROR in html
+    return _NO_REPORT_FILES_FOUND_ERROR in html
 
 
 def _get_last_processed_buildnumber(build_name):
-  query = 'SELECT max(build_number) FROM [%s:%s.%s];' % (
-      _PROJECT_ID, _DATASET_ID, build_name)
-  query_job = big_query_utils.sync_query_job(bq, _PROJECT_ID, query)
-  page = bq.jobs().getQueryResults(
-      pageToken=None,
-      **query_job['jobReference']).execute(num_retries=3)
-  if page['rows'][0]['f'][0]['v']:
-    return int(page['rows'][0]['f'][0]['v'])
-  return 0
+    query = 'SELECT max(build_number) FROM [%s:%s.%s];' % (
+        _PROJECT_ID, _DATASET_ID, build_name)
+    query_job = big_query_utils.sync_query_job(bq, _PROJECT_ID, query)
+    page = bq.jobs().getQueryResults(
+        pageToken=None, **query_job['jobReference']).execute(num_retries=3)
+    if page['rows'][0]['f'][0]['v']:
+        return int(page['rows'][0]['f'][0]['v'])
+    return 0
 
 
 def _process_matrix(build, url_base):
-  matrix_list = []
-  for matrix in build.get_matrix_runs():
-    matrix_str = re.match('.*\\xc2\\xbb ((?:[^,]+,?)+) #.*', 
-                          matrix.name).groups()[0]
-    matrix_tuple = matrix_str.split(',')
-    json_url = '%s/config=%s,language=%s,platform=%s/testReport/api/json' % (
-        url_base, matrix_tuple[0], matrix_tuple[1], matrix_tuple[2])
-    console_url = '%s/config=%s,language=%s,platform=%s/consoleFull' % (
-        url_base, matrix_tuple[0], matrix_tuple[1], matrix_tuple[2])
-    matrix_dict = {'name': matrix_str,
-                   'duration': matrix.get_duration().total_seconds()}
-    matrix_dict.update(_process_build(json_url, console_url))
-    matrix_list.append(matrix_dict)
-
-  return matrix_list 
+    matrix_list = []
+    for matrix in build.get_matrix_runs():
+        matrix_str = re.match('.*\\xc2\\xbb ((?:[^,]+,?)+) #.*',
+                              matrix.name).groups()[0]
+        matrix_tuple = matrix_str.split(',')
+        json_url = '%s/config=%s,language=%s,platform=%s/testReport/api/json' % (
+            url_base, matrix_tuple[0], matrix_tuple[1], matrix_tuple[2])
+        console_url = '%s/config=%s,language=%s,platform=%s/consoleFull' % (
+            url_base, matrix_tuple[0], matrix_tuple[1], matrix_tuple[2])
+        matrix_dict = {
+            'name': matrix_str,
+            'duration': matrix.get_duration().total_seconds()
+        }
+        matrix_dict.update(_process_build(json_url, console_url))
+        matrix_list.append(matrix_dict)
+
+    return matrix_list
 
 
 def _process_build(json_url, console_url):
-  build_result = {}
-  error_list = []
-  try:
-    html = urllib.urlopen(json_url).read()
-    test_result = json.loads(html)
-    print('====> Parsing result from %s' % json_url)
-    failure_count = test_result['failCount']
-    build_result['pass_count'] = test_result['passCount']
-    build_result['failure_count'] = failure_count
-    # This means Jenkins failure occurred.
-    build_result['no_report_files_found'] = _no_report_files_found(html)
-    # Only check errors if Jenkins failure occurred.
-    if build_result['no_report_files_found']:
-      error_list = _scrape_for_known_errors(html)
-  except Exception as e:
-    print('====> Got exception for %s: %s.' % (json_url, str(e)))   
-    print('====> Parsing errors from %s.' % console_url)
-    html = urllib.urlopen(console_url).read()
-    build_result['pass_count'] = 0  
-    build_result['failure_count'] = 1
-    # In this case, the string doesn't exist in the result html but the fact 
-    # that we fail to parse the result html indicates Jenkins failure and hence 
-    # no report files were generated.
-    build_result['no_report_files_found'] = True
-    error_list = _scrape_for_known_errors(html)
-
-  if error_list:
-    build_result['error'] = error_list
-  elif build_result['no_report_files_found']:
-    build_result['error'] = [{'description': _UNKNOWN_ERROR, 'count': 1}]
-  else:
-    build_result['error'] = [{'description': '', 'count': 0}]
-
-  return build_result 
+    build_result = {}
+    error_list = []
+    try:
+        html = urllib.urlopen(json_url).read()
+        test_result = json.loads(html)
+        print('====> Parsing result from %s' % json_url)
+        failure_count = test_result['failCount']
+        build_result['pass_count'] = test_result['passCount']
+        build_result['failure_count'] = failure_count
+        # This means Jenkins failure occurred.
+        build_result['no_report_files_found'] = _no_report_files_found(html)
+        # Only check errors if Jenkins failure occurred.
+        if build_result['no_report_files_found']:
+            error_list = _scrape_for_known_errors(html)
+    except Exception as e:
+        print('====> Got exception for %s: %s.' % (json_url, str(e)))
+        print('====> Parsing errors from %s.' % console_url)
+        html = urllib.urlopen(console_url).read()
+        build_result['pass_count'] = 0
+        build_result['failure_count'] = 1
+        # In this case, the string doesn't exist in the result html but the fact 
+        # that we fail to parse the result html indicates Jenkins failure and hence 
+        # no report files were generated.
+        build_result['no_report_files_found'] = True
+        error_list = _scrape_for_known_errors(html)
+
+    if error_list:
+        build_result['error'] = error_list
+    elif build_result['no_report_files_found']:
+        build_result['error'] = [{'description': _UNKNOWN_ERROR, 'count': 1}]
+    else:
+        build_result['error'] = [{'description': '', 'count': 0}]
+
+    return build_result
 
 
 # parse command line
 argp = argparse.ArgumentParser(description='Get build statistics.')
 argp.add_argument('-u', '--username', default='jenkins')
-argp.add_argument('-b', '--builds', 
-                  choices=['all'] + sorted(_BUILDS.keys()),
-                  nargs='+',
-                  default=['all'])
+argp.add_argument(
+    '-b',
+    '--builds',
+    choices=['all'] + sorted(_BUILDS.keys()),
+    nargs='+',
+    default=['all'])
 args = argp.parse_args()
 
 J = Jenkins('https://grpc-testing.appspot.com', args.username, 'apiToken')
 bq = big_query_utils.create_big_query()
 
 for build_name in _BUILDS.keys() if 'all' in args.builds else args.builds:
-  print('====> Build: %s' % build_name)
-  # Since get_last_completed_build() always fails due to malformatted string
-  # error, we use get_build_metadata() instead.
-  job = None
-  try:
-    job = J[build_name]
-  except Exception as e:
-    print('====> Failed to get build %s: %s.' % (build_name, str(e)))
-    continue
-  last_processed_build_number = _get_last_processed_buildnumber(build_name)
-  last_complete_build_number = job.get_last_completed_buildnumber()
-  # To avoid processing all builds for a project never looked at. In this case,
-  # only examine 10 latest builds.
-  starting_build_number = max(last_processed_build_number+1, 
-                              last_complete_build_number-9)
-  for build_number in xrange(starting_build_number, 
-                             last_complete_build_number+1):
-    print('====> Processing %s build %d.' % (build_name, build_number))
-    build = None
+    print('====> Build: %s' % build_name)
+    # Since get_last_completed_build() always fails due to malformatted string
+    # error, we use get_build_metadata() instead.
+    job = None
     try:
-      build = job.get_build_metadata(build_number)
-      print('====> Build status: %s.' % build.get_status())
-      if build.get_status() == 'ABORTED':
+        job = J[build_name]
+    except Exception as e:
+        print('====> Failed to get build %s: %s.' % (build_name, str(e)))
         continue
-      # If any build is still running, stop processing this job. Next time, we
-      # start from where it was left so that all builds are processed 
-      # sequentially.
-      if build.is_running():
-        print('====> Build %d is still running.' % build_number)
-        break
-    except KeyError:
-      print('====> Build %s is missing. Skip.' % build_number)
-      continue
-    build_result = {'build_number': build_number, 
-                    'timestamp': str(build.get_timestamp())}
-    url_base = json_url = '%s/%s/%d' % (_URL_BASE, build_name, build_number)
-    if _BUILDS[build_name]:  # The build has matrix, such as gRPC_master.
-      build_result['matrix'] = _process_matrix(build, url_base)
-    else:
-      json_url = '%s/testReport/api/json' % url_base
-      console_url = '%s/consoleFull' % url_base
-      build_result['duration'] = build.get_duration().total_seconds()
-      build_stat = _process_build(json_url, console_url)
-      build_result.update(build_stat)
-    rows = [big_query_utils.make_row(build_number, build_result)]
-    if not big_query_utils.insert_rows(bq, _PROJECT_ID, _DATASET_ID, build_name, 
-                                       rows):
-      print('====> Error uploading result to bigquery.')
-      sys.exit(1)
+    last_processed_build_number = _get_last_processed_buildnumber(build_name)
+    last_complete_build_number = job.get_last_completed_buildnumber()
+    # To avoid processing all builds for a project never looked at. In this case,
+    # only examine 10 latest builds.
+    starting_build_number = max(last_processed_build_number + 1,
+                                last_complete_build_number - 9)
+    for build_number in xrange(starting_build_number,
+                               last_complete_build_number + 1):
+        print('====> Processing %s build %d.' % (build_name, build_number))
+        build = None
+        try:
+            build = job.get_build_metadata(build_number)
+            print('====> Build status: %s.' % build.get_status())
+            if build.get_status() == 'ABORTED':
+                continue
+            # If any build is still running, stop processing this job. Next time, we
+            # start from where it was left so that all builds are processed 
+            # sequentially.
+            if build.is_running():
+                print('====> Build %d is still running.' % build_number)
+                break
+        except KeyError:
+            print('====> Build %s is missing. Skip.' % build_number)
+            continue
+        build_result = {
+            'build_number': build_number,
+            'timestamp': str(build.get_timestamp())
+        }
+        url_base = json_url = '%s/%s/%d' % (_URL_BASE, build_name, build_number)
+        if _BUILDS[build_name]:  # The build has matrix, such as gRPC_master.
+            build_result['matrix'] = _process_matrix(build, url_base)
+        else:
+            json_url = '%s/testReport/api/json' % url_base
+            console_url = '%s/consoleFull' % url_base
+            build_result['duration'] = build.get_duration().total_seconds()
+            build_stat = _process_build(json_url, console_url)
+            build_result.update(build_stat)
+        rows = [big_query_utils.make_row(build_number, build_result)]
+        if not big_query_utils.insert_rows(bq, _PROJECT_ID, _DATASET_ID,
+                                           build_name, rows):
+            print('====> Error uploading result to bigquery.')
+            sys.exit(1)
diff --git a/tools/run_tests/run_interop_tests.py b/tools/run_tests/run_interop_tests.py
index 8f46ea99fd..99f4298813 100755
--- a/tools/run_tests/run_interop_tests.py
+++ b/tools/run_tests/run_interop_tests.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Run interop (cross-language) tests in parallel."""
 
 from __future__ import print_function
@@ -37,9 +36,9 @@ import python_utils.jobset as jobset
 import python_utils.report_utils as report_utils
 # It's ok to not import because this is only necessary to upload results to BQ.
 try:
-  from python_utils.upload_test_results import upload_interop_results_to_bq
+    from python_utils.upload_test_results import upload_interop_results_to_bq
 except ImportError as e:
-  print(e)
+    print(e)
 
 # Docker doesn't clean up after itself, so we do it on exit.
 atexit.register(lambda: subprocess.call(['stty', 'echo']))
@@ -47,22 +46,24 @@ atexit.register(lambda: subprocess.call(['stty', 'echo']))
 ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
 os.chdir(ROOT)
 
-_DEFAULT_SERVER_PORT=8080
+_DEFAULT_SERVER_PORT = 8080
 
-_SKIP_CLIENT_COMPRESSION = ['client_compressed_unary',
-                            'client_compressed_streaming']
+_SKIP_CLIENT_COMPRESSION = [
+    'client_compressed_unary', 'client_compressed_streaming'
+]
 
-_SKIP_SERVER_COMPRESSION = ['server_compressed_unary',
-                            'server_compressed_streaming']
+_SKIP_SERVER_COMPRESSION = [
+    'server_compressed_unary', 'server_compressed_streaming'
+]
 
 _SKIP_COMPRESSION = _SKIP_CLIENT_COMPRESSION + _SKIP_SERVER_COMPRESSION
 
-_SKIP_ADVANCED = ['status_code_and_message',
-                  'custom_metadata',
-                  'unimplemented_method',
-                  'unimplemented_service']
+_SKIP_ADVANCED = [
+    'status_code_and_message', 'custom_metadata', 'unimplemented_method',
+    'unimplemented_service'
+]
 
-_TEST_TIMEOUT = 3*60
+_TEST_TIMEOUT = 3 * 60
 
 # disable this test on core-based languages,
 # see https://github.com/grpc/grpc/issues/9779
@@ -77,977 +78,1054 @@ _XML_REPORT = 'report.xml'
 
 class CXXLanguage:
 
-  def __init__(self):
-    self.client_cwd = None
-    self.server_cwd = None
-    self.http2_cwd = None
-    self.safename = 'cxx'
+    def __init__(self):
+        self.client_cwd = None
+        self.server_cwd = None
+        self.http2_cwd = None
+        self.safename = 'cxx'
 
-  def client_cmd(self, args):
-    return ['bins/opt/interop_client'] + args
+    def client_cmd(self, args):
+        return ['bins/opt/interop_client'] + args
 
-  def client_cmd_http2interop(self, args):
-    return ['bins/opt/http2_client'] + args
+    def client_cmd_http2interop(self, args):
+        return ['bins/opt/http2_client'] + args
 
-  def cloud_to_prod_env(self):
-    return {}
+    def cloud_to_prod_env(self):
+        return {}
 
-  def server_cmd(self, args):
-    return ['bins/opt/interop_server'] + args
+    def server_cmd(self, args):
+        return ['bins/opt/interop_server'] + args
 
-  def global_env(self):
-    return {}
+    def global_env(self):
+        return {}
 
-  def unimplemented_test_cases(self):
-    return _SKIP_DATA_FRAME_PADDING
+    def unimplemented_test_cases(self):
+        return _SKIP_DATA_FRAME_PADDING
 
-  def unimplemented_test_cases_server(self):
-    return []
+    def unimplemented_test_cases_server(self):
+        return []
 
-  def __str__(self):
-    return 'c++'
+    def __str__(self):
+        return 'c++'
 
 
 class CSharpLanguage:
 
-  def __init__(self):
-    self.client_cwd = 'src/csharp/Grpc.IntegrationTesting.Client/bin/Debug/net45'
-    self.server_cwd = 'src/csharp/Grpc.IntegrationTesting.Server/bin/Debug/net45'
-    self.safename = str(self)
+    def __init__(self):
+        self.client_cwd = 'src/csharp/Grpc.IntegrationTesting.Client/bin/Debug/net45'
+        self.server_cwd = 'src/csharp/Grpc.IntegrationTesting.Server/bin/Debug/net45'
+        self.safename = str(self)
 
-  def client_cmd(self, args):
-    return ['mono', 'Grpc.IntegrationTesting.Client.exe'] + args
+    def client_cmd(self, args):
+        return ['mono', 'Grpc.IntegrationTesting.Client.exe'] + args
 
-  def cloud_to_prod_env(self):
-    return {}
+    def cloud_to_prod_env(self):
+        return {}
 
-  def server_cmd(self, args):
-    return ['mono', 'Grpc.IntegrationTesting.Server.exe'] + args
+    def server_cmd(self, args):
+        return ['mono', 'Grpc.IntegrationTesting.Server.exe'] + args
 
-  def global_env(self):
-    return {}
+    def global_env(self):
+        return {}
 
-  def unimplemented_test_cases(self):
-    return _SKIP_SERVER_COMPRESSION + _SKIP_DATA_FRAME_PADDING
+    def unimplemented_test_cases(self):
+        return _SKIP_SERVER_COMPRESSION + _SKIP_DATA_FRAME_PADDING
 
-  def unimplemented_test_cases_server(self):
-    return _SKIP_COMPRESSION
+    def unimplemented_test_cases_server(self):
+        return _SKIP_COMPRESSION
 
-  def __str__(self):
-    return 'csharp'
+    def __str__(self):
+        return 'csharp'
 
 
 class CSharpCoreCLRLanguage:
 
-  def __init__(self):
-    self.client_cwd = 'src/csharp/Grpc.IntegrationTesting.Client/bin/Debug/netcoreapp1.0'
-    self.server_cwd = 'src/csharp/Grpc.IntegrationTesting.Server/bin/Debug/netcoreapp1.0'
-    self.safename = str(self)
+    def __init__(self):
+        self.client_cwd = 'src/csharp/Grpc.IntegrationTesting.Client/bin/Debug/netcoreapp1.0'
+        self.server_cwd = 'src/csharp/Grpc.IntegrationTesting.Server/bin/Debug/netcoreapp1.0'
+        self.safename = str(self)
 
-  def client_cmd(self, args):
-    return ['dotnet', 'exec', 'Grpc.IntegrationTesting.Client.dll'] + args
+    def client_cmd(self, args):
+        return ['dotnet', 'exec', 'Grpc.IntegrationTesting.Client.dll'] + args
 
-  def cloud_to_prod_env(self):
-    return {}
+    def cloud_to_prod_env(self):
+        return {}
 
-  def server_cmd(self, args):
-    return ['dotnet', 'exec', 'Grpc.IntegrationTesting.Server.dll'] + args
+    def server_cmd(self, args):
+        return ['dotnet', 'exec', 'Grpc.IntegrationTesting.Server.dll'] + args
 
-  def global_env(self):
-    return {}
+    def global_env(self):
+        return {}
 
-  def unimplemented_test_cases(self):
-    return _SKIP_SERVER_COMPRESSION + _SKIP_DATA_FRAME_PADDING
+    def unimplemented_test_cases(self):
+        return _SKIP_SERVER_COMPRESSION + _SKIP_DATA_FRAME_PADDING
 
-  def unimplemented_test_cases_server(self):
-    return _SKIP_COMPRESSION
+    def unimplemented_test_cases_server(self):
+        return _SKIP_COMPRESSION
 
-  def __str__(self):
-    return 'csharpcoreclr'
+    def __str__(self):
+        return 'csharpcoreclr'
 
 
 class JavaLanguage:
 
-  def __init__(self):
-    self.client_cwd = '../grpc-java'
-    self.server_cwd = '../grpc-java'
-    self.http2_cwd = '../grpc-java'
-    self.safename = str(self)
+    def __init__(self):
+        self.client_cwd = '../grpc-java'
+        self.server_cwd = '../grpc-java'
+        self.http2_cwd = '../grpc-java'
+        self.safename = str(self)
 
-  def client_cmd(self, args):
-    return ['./run-test-client.sh'] + args
+    def client_cmd(self, args):
+        return ['./run-test-client.sh'] + args
 
-  def client_cmd_http2interop(self, args):
-    return ['./interop-testing/build/install/grpc-interop-testing/bin/http2-client'] + args
+    def client_cmd_http2interop(self, args):
+        return [
+            './interop-testing/build/install/grpc-interop-testing/bin/http2-client'
+        ] + args
 
-  def cloud_to_prod_env(self):
-    return {}
+    def cloud_to_prod_env(self):
+        return {}
 
-  def server_cmd(self, args):
-    return ['./run-test-server.sh'] + args
+    def server_cmd(self, args):
+        return ['./run-test-server.sh'] + args
 
-  def global_env(self):
-    return {}
+    def global_env(self):
+        return {}
 
-  def unimplemented_test_cases(self):
-    return []
+    def unimplemented_test_cases(self):
+        return []
 
-  def unimplemented_test_cases_server(self):
-    return _SKIP_COMPRESSION
+    def unimplemented_test_cases_server(self):
+        return _SKIP_COMPRESSION
 
-  def __str__(self):
-    return 'java'
+    def __str__(self):
+        return 'java'
 
 
 class JavaOkHttpClient:
 
-  def __init__(self):
-    self.client_cwd = '../grpc-java'
-    self.safename = 'java'
+    def __init__(self):
+        self.client_cwd = '../grpc-java'
+        self.safename = 'java'
 
-  def client_cmd(self, args):
-    return ['./run-test-client.sh', '--use_okhttp=true'] + args
+    def client_cmd(self, args):
+        return ['./run-test-client.sh', '--use_okhttp=true'] + args
 
-  def cloud_to_prod_env(self):
-    return {}
+    def cloud_to_prod_env(self):
+        return {}
 
-  def global_env(self):
-    return {}
+    def global_env(self):
+        return {}
 
-  def unimplemented_test_cases(self):
-    return _SKIP_DATA_FRAME_PADDING
+    def unimplemented_test_cases(self):
+        return _SKIP_DATA_FRAME_PADDING
 
-  def __str__(self):
-    return 'javaokhttp'
+    def __str__(self):
+        return 'javaokhttp'
 
 
 class GoLanguage:
 
-  def __init__(self):
-    # TODO: this relies on running inside docker
-    self.client_cwd = '/go/src/google.golang.org/grpc/interop/client'
-    self.server_cwd = '/go/src/google.golang.org/grpc/interop/server'
-    self.http2_cwd = '/go/src/google.golang.org/grpc/interop/http2'
-    self.safename = str(self)
+    def __init__(self):
+        # TODO: this relies on running inside docker
+        self.client_cwd = '/go/src/google.golang.org/grpc/interop/client'
+        self.server_cwd = '/go/src/google.golang.org/grpc/interop/server'
+        self.http2_cwd = '/go/src/google.golang.org/grpc/interop/http2'
+        self.safename = str(self)
+
+    def client_cmd(self, args):
+        return ['go', 'run', 'client.go'] + args
 
-  def client_cmd(self, args):
-    return ['go', 'run', 'client.go'] + args
+    def client_cmd_http2interop(self, args):
+        return ['go', 'run', 'negative_http2_client.go'] + args
 
-  def client_cmd_http2interop(self, args):
-    return ['go', 'run', 'negative_http2_client.go'] + args
+    def cloud_to_prod_env(self):
+        return {}
 
-  def cloud_to_prod_env(self):
-    return {}
+    def server_cmd(self, args):
+        return ['go', 'run', 'server.go'] + args
 
-  def server_cmd(self, args):
-    return ['go', 'run', 'server.go'] + args
+    def global_env(self):
+        return {}
 
-  def global_env(self):
-    return {}
+    def unimplemented_test_cases(self):
+        return _SKIP_COMPRESSION
 
-  def unimplemented_test_cases(self):
-    return _SKIP_COMPRESSION
+    def unimplemented_test_cases_server(self):
+        return _SKIP_COMPRESSION
 
-  def unimplemented_test_cases_server(self):
-    return _SKIP_COMPRESSION
+    def __str__(self):
+        return 'go'
 
-  def __str__(self):
-    return 'go'
 
 class Http2Server:
-  """Represents the HTTP/2 Interop Test server
+    """Represents the HTTP/2 Interop Test server
 
   This pretends to be a language in order to be built and run, but really it
   isn't.
   """
-  def __init__(self):
-    self.server_cwd = None
-    self.safename = str(self)
 
-  def server_cmd(self, args):
-    return ['python test/http2_test/http2_test_server.py']
+    def __init__(self):
+        self.server_cwd = None
+        self.safename = str(self)
+
+    def server_cmd(self, args):
+        return ['python test/http2_test/http2_test_server.py']
+
+    def cloud_to_prod_env(self):
+        return {}
 
-  def cloud_to_prod_env(self):
-    return {}
+    def global_env(self):
+        return {}
 
-  def global_env(self):
-    return {}
+    def unimplemented_test_cases(self):
+        return _TEST_CASES + _SKIP_DATA_FRAME_PADDING
 
-  def unimplemented_test_cases(self):
-    return _TEST_CASES + _SKIP_DATA_FRAME_PADDING
+    def unimplemented_test_cases_server(self):
+        return _TEST_CASES
 
-  def unimplemented_test_cases_server(self):
-    return _TEST_CASES
+    def __str__(self):
+        return 'http2'
 
-  def __str__(self):
-    return 'http2'
 
 class Http2Client:
-  """Represents the HTTP/2 Interop Test
+    """Represents the HTTP/2 Interop Test
 
   This pretends to be a language in order to be built and run, but really it
   isn't.
   """
-  def __init__(self):
-    self.client_cwd = None
-    self.safename = str(self)
 
-  def client_cmd(self, args):
-    return ['tools/http2_interop/http2_interop.test', '-test.v'] + args
+    def __init__(self):
+        self.client_cwd = None
+        self.safename = str(self)
 
-  def cloud_to_prod_env(self):
-    return {}
+    def client_cmd(self, args):
+        return ['tools/http2_interop/http2_interop.test', '-test.v'] + args
 
-  def global_env(self):
-    return {}
+    def cloud_to_prod_env(self):
+        return {}
 
-  def unimplemented_test_cases(self):
-    return _TEST_CASES
+    def global_env(self):
+        return {}
 
-  def unimplemented_test_cases_server(self):
-    return _TEST_CASES
+    def unimplemented_test_cases(self):
+        return _TEST_CASES
+
+    def unimplemented_test_cases_server(self):
+        return _TEST_CASES
+
+    def __str__(self):
+        return 'http2'
 
-  def __str__(self):
-    return 'http2'
 
 class NodeLanguage:
 
-  def __init__(self):
-    self.client_cwd = '../grpc-node'
-    self.server_cwd = '../grpc-node'
-    self.safename = str(self)
+    def __init__(self):
+        self.client_cwd = '../grpc-node'
+        self.server_cwd = '../grpc-node'
+        self.safename = str(self)
 
-  def client_cmd(self, args):
-    return ['packages/grpc-native-core/deps/grpc/tools/run_tests/interop/with_nvm.sh',
+    def client_cmd(self, args):
+        return [
+            'packages/grpc-native-core/deps/grpc/tools/run_tests/interop/with_nvm.sh',
             'node', '--require', './test/fixtures/native_native',
-            'test/interop/interop_client.js'] + args
+            'test/interop/interop_client.js'
+        ] + args
 
-  def cloud_to_prod_env(self):
-    return {}
+    def cloud_to_prod_env(self):
+        return {}
 
-  def server_cmd(self, args):
-    return ['packages/grpc-native-core/deps/grpc/tools/run_tests/interop/with_nvm.sh',
+    def server_cmd(self, args):
+        return [
+            'packages/grpc-native-core/deps/grpc/tools/run_tests/interop/with_nvm.sh',
             'node', '--require', './test/fixtures/native_native',
-            'test/interop/interop_server.js'] + args
+            'test/interop/interop_server.js'
+        ] + args
 
-  def global_env(self):
-    return {}
+    def global_env(self):
+        return {}
 
-  def unimplemented_test_cases(self):
-    return _SKIP_COMPRESSION + _SKIP_DATA_FRAME_PADDING
+    def unimplemented_test_cases(self):
+        return _SKIP_COMPRESSION + _SKIP_DATA_FRAME_PADDING
 
-  def unimplemented_test_cases_server(self):
-    return _SKIP_COMPRESSION
+    def unimplemented_test_cases_server(self):
+        return _SKIP_COMPRESSION
 
-  def __str__(self):
-    return 'node'
+    def __str__(self):
+        return 'node'
 
 
 class PHPLanguage:
 
-  def __init__(self):
-    self.client_cwd = None
-    self.safename = str(self)
+    def __init__(self):
+        self.client_cwd = None
+        self.safename = str(self)
 
-  def client_cmd(self, args):
-    return ['src/php/bin/interop_client.sh'] + args
+    def client_cmd(self, args):
+        return ['src/php/bin/interop_client.sh'] + args
 
-  def cloud_to_prod_env(self):
-    return {}
+    def cloud_to_prod_env(self):
+        return {}
 
-  def global_env(self):
-    return {}
+    def global_env(self):
+        return {}
 
-  def unimplemented_test_cases(self):
-    return _SKIP_COMPRESSION + _SKIP_DATA_FRAME_PADDING
+    def unimplemented_test_cases(self):
+        return _SKIP_COMPRESSION + _SKIP_DATA_FRAME_PADDING
 
-  def unimplemented_test_cases_server(self):
-    return []
+    def unimplemented_test_cases_server(self):
+        return []
 
-  def __str__(self):
-    return 'php'
+    def __str__(self):
+        return 'php'
 
 
 class PHP7Language:
 
-  def __init__(self):
-    self.client_cwd = None
-    self.safename = str(self)
+    def __init__(self):
+        self.client_cwd = None
+        self.safename = str(self)
 
-  def client_cmd(self, args):
-    return ['src/php/bin/interop_client.sh'] + args
+    def client_cmd(self, args):
+        return ['src/php/bin/interop_client.sh'] + args
 
-  def cloud_to_prod_env(self):
-    return {}
+    def cloud_to_prod_env(self):
+        return {}
 
-  def global_env(self):
-    return {}
+    def global_env(self):
+        return {}
 
-  def unimplemented_test_cases(self):
-    return _SKIP_COMPRESSION + _SKIP_DATA_FRAME_PADDING
+    def unimplemented_test_cases(self):
+        return _SKIP_COMPRESSION + _SKIP_DATA_FRAME_PADDING
 
-  def unimplemented_test_cases_server(self):
-    return []
+    def unimplemented_test_cases_server(self):
+        return []
+
+    def __str__(self):
+        return 'php7'
 
-  def __str__(self):
-    return 'php7'
 
 class ObjcLanguage:
 
-  def __init__(self):
-    self.client_cwd = 'src/objective-c/tests'
-    self.safename = str(self)
+    def __init__(self):
+        self.client_cwd = 'src/objective-c/tests'
+        self.safename = str(self)
+
+    def client_cmd(self, args):
+        # from args, extract the server port and craft xcodebuild command out of it
+        for arg in args:
+            port = re.search('--server_port=(\d+)', arg)
+            if port:
+                portnum = port.group(1)
+                cmdline = 'pod install && xcodebuild -workspace Tests.xcworkspace -scheme InteropTestsLocalSSL -destination name="iPhone 6" HOST_PORT_LOCALSSL=localhost:%s test' % portnum
+                return [cmdline]
 
-  def client_cmd(self, args):
-    # from args, extract the server port and craft xcodebuild command out of it
-    for arg in args:
-      port = re.search('--server_port=(\d+)', arg)
-      if port:
-        portnum = port.group(1)
-        cmdline = 'pod install && xcodebuild -workspace Tests.xcworkspace -scheme InteropTestsLocalSSL -destination name="iPhone 6" HOST_PORT_LOCALSSL=localhost:%s test'%portnum
-        return [cmdline]
+    def cloud_to_prod_env(self):
+        return {}
 
-  def cloud_to_prod_env(self):
-    return {}
+    def global_env(self):
+        return {}
 
-  def global_env(self):
-    return {}
+    def unimplemented_test_cases(self):
+        # ObjC test runs all cases with the same command. It ignores the testcase
+        # cmdline argument. Here we return all but one test cases as unimplemented,
+        # and depend upon ObjC test's behavior that it runs all cases even when
+        # we tell it to run just one.
+        return _TEST_CASES[1:] + _SKIP_COMPRESSION + _SKIP_DATA_FRAME_PADDING
 
-  def unimplemented_test_cases(self):
-    # ObjC test runs all cases with the same command. It ignores the testcase
-    # cmdline argument. Here we return all but one test cases as unimplemented,
-    # and depend upon ObjC test's behavior that it runs all cases even when
-    # we tell it to run just one.
-    return _TEST_CASES[1:] + _SKIP_COMPRESSION + _SKIP_DATA_FRAME_PADDING
+    def unimplemented_test_cases_server(self):
+        return _SKIP_COMPRESSION
 
-  def unimplemented_test_cases_server(self):
-    return _SKIP_COMPRESSION
+    def __str__(self):
+        return 'objc'
 
-  def __str__(self):
-    return 'objc'
 
 class RubyLanguage:
 
-  def __init__(self):
-    self.client_cwd = None
-    self.server_cwd = None
-    self.safename = str(self)
+    def __init__(self):
+        self.client_cwd = None
+        self.server_cwd = None
+        self.safename = str(self)
 
-  def client_cmd(self, args):
-    return ['tools/run_tests/interop/with_rvm.sh',
-            'ruby', 'src/ruby/pb/test/client.rb'] + args
+    def client_cmd(self, args):
+        return [
+            'tools/run_tests/interop/with_rvm.sh', 'ruby',
+            'src/ruby/pb/test/client.rb'
+        ] + args
 
-  def cloud_to_prod_env(self):
-    return {}
+    def cloud_to_prod_env(self):
+        return {}
 
-  def server_cmd(self, args):
-    return ['tools/run_tests/interop/with_rvm.sh',
-            'ruby', 'src/ruby/pb/test/server.rb'] + args
+    def server_cmd(self, args):
+        return [
+            'tools/run_tests/interop/with_rvm.sh', 'ruby',
+            'src/ruby/pb/test/server.rb'
+        ] + args
 
-  def global_env(self):
-    return {}
+    def global_env(self):
+        return {}
 
-  def unimplemented_test_cases(self):
-    return _SKIP_SERVER_COMPRESSION + _SKIP_DATA_FRAME_PADDING
+    def unimplemented_test_cases(self):
+        return _SKIP_SERVER_COMPRESSION + _SKIP_DATA_FRAME_PADDING
 
-  def unimplemented_test_cases_server(self):
-    return _SKIP_COMPRESSION
+    def unimplemented_test_cases_server(self):
+        return _SKIP_COMPRESSION
+
+    def __str__(self):
+        return 'ruby'
 
-  def __str__(self):
-    return 'ruby'
 
 class PythonLanguage:
 
-  def __init__(self):
-    self.client_cwd = None
-    self.server_cwd = None
-    self.http2_cwd = None
-    self.safename = str(self)
-
-  def client_cmd(self, args):
-    return [
-        'py27/bin/python',
-        'src/python/grpcio_tests/setup.py',
-        'run_interop',
-        '--client',
-        '--args="{}"'.format(' '.join(args))
-    ]
+    def __init__(self):
+        self.client_cwd = None
+        self.server_cwd = None
+        self.http2_cwd = None
+        self.safename = str(self)
 
-  def client_cmd_http2interop(self, args):
-    return [ 'py27/bin/python',
-              'src/python/grpcio_tests/tests/http2/negative_http2_client.py',
-           ] + args
-
-  def cloud_to_prod_env(self):
-    return {}
-
-  def server_cmd(self, args):
-    return [
-        'py27/bin/python',
-        'src/python/grpcio_tests/setup.py',
-        'run_interop',
-        '--server',
-        '--args="{}"'.format(' '.join(args))
-    ]
+    def client_cmd(self, args):
+        return [
+            'py27/bin/python', 'src/python/grpcio_tests/setup.py',
+            'run_interop', '--client', '--args="{}"'.format(' '.join(args))
+        ]
+
+    def client_cmd_http2interop(self, args):
+        return [
+            'py27/bin/python',
+            'src/python/grpcio_tests/tests/http2/negative_http2_client.py',
+        ] + args
 
-  def global_env(self):
-    return {'LD_LIBRARY_PATH': '{}/libs/opt'.format(DOCKER_WORKDIR_ROOT),
-            'PYTHONPATH': '{}/src/python/gens'.format(DOCKER_WORKDIR_ROOT)}
+    def cloud_to_prod_env(self):
+        return {}
 
-  def unimplemented_test_cases(self):
-    return _SKIP_COMPRESSION + _SKIP_DATA_FRAME_PADDING
+    def server_cmd(self, args):
+        return [
+            'py27/bin/python', 'src/python/grpcio_tests/setup.py',
+            'run_interop', '--server', '--args="{}"'.format(' '.join(args))
+        ]
 
-  def unimplemented_test_cases_server(self):
-    return _SKIP_COMPRESSION
+    def global_env(self):
+        return {
+            'LD_LIBRARY_PATH': '{}/libs/opt'.format(DOCKER_WORKDIR_ROOT),
+            'PYTHONPATH': '{}/src/python/gens'.format(DOCKER_WORKDIR_ROOT)
+        }
 
-  def __str__(self):
-    return 'python'
+    def unimplemented_test_cases(self):
+        return _SKIP_COMPRESSION + _SKIP_DATA_FRAME_PADDING
+
+    def unimplemented_test_cases_server(self):
+        return _SKIP_COMPRESSION
+
+    def __str__(self):
+        return 'python'
 
 
 _LANGUAGES = {
-    'c++' : CXXLanguage(),
-    'csharp' : CSharpLanguage(),
-    'csharpcoreclr' : CSharpCoreCLRLanguage(),
-    'go' : GoLanguage(),
-    'java' : JavaLanguage(),
-    'javaokhttp' : JavaOkHttpClient(),
-    'node' : NodeLanguage(),
-    'php' :  PHPLanguage(),
-    'php7' :  PHP7Language(),
-    'objc' : ObjcLanguage(),
-    'ruby' : RubyLanguage(),
-    'python' : PythonLanguage(),
+    'c++': CXXLanguage(),
+    'csharp': CSharpLanguage(),
+    'csharpcoreclr': CSharpCoreCLRLanguage(),
+    'go': GoLanguage(),
+    'java': JavaLanguage(),
+    'javaokhttp': JavaOkHttpClient(),
+    'node': NodeLanguage(),
+    'php': PHPLanguage(),
+    'php7': PHP7Language(),
+    'objc': ObjcLanguage(),
+    'ruby': RubyLanguage(),
+    'python': PythonLanguage(),
 }
 
 # languages supported as cloud_to_cloud servers
-_SERVERS = ['c++', 'node', 'csharp', 'csharpcoreclr', 'java', 'go', 'ruby', 'python']
-
-_TEST_CASES = ['large_unary', 'empty_unary', 'ping_pong',
-               'empty_stream', 'client_streaming', 'server_streaming',
-               'cancel_after_begin', 'cancel_after_first_response',
-               'timeout_on_sleeping_server', 'custom_metadata',
-               'status_code_and_message', 'unimplemented_method',
-               'client_compressed_unary', 'server_compressed_unary',
-               'client_compressed_streaming', 'server_compressed_streaming',
-               'unimplemented_service']
-
-_AUTH_TEST_CASES = ['compute_engine_creds', 'jwt_token_creds',
-                    'oauth2_auth_token', 'per_rpc_creds']
+_SERVERS = [
+    'c++', 'node', 'csharp', 'csharpcoreclr', 'java', 'go', 'ruby', 'python'
+]
+
+_TEST_CASES = [
+    'large_unary', 'empty_unary', 'ping_pong', 'empty_stream',
+    'client_streaming', 'server_streaming', 'cancel_after_begin',
+    'cancel_after_first_response', 'timeout_on_sleeping_server',
+    'custom_metadata', 'status_code_and_message', 'unimplemented_method',
+    'client_compressed_unary', 'server_compressed_unary',
+    'client_compressed_streaming', 'server_compressed_streaming',
+    'unimplemented_service'
+]
+
+_AUTH_TEST_CASES = [
+    'compute_engine_creds', 'jwt_token_creds', 'oauth2_auth_token',
+    'per_rpc_creds'
+]
 
 _HTTP2_TEST_CASES = ['tls', 'framing']
 
-_HTTP2_SERVER_TEST_CASES = ['rst_after_header', 'rst_after_data', 'rst_during_data',
-                               'goaway', 'ping', 'max_streams', 'data_frame_padding', 'no_df_padding_sanity_test']
+_HTTP2_SERVER_TEST_CASES = [
+    'rst_after_header', 'rst_after_data', 'rst_during_data', 'goaway', 'ping',
+    'max_streams', 'data_frame_padding', 'no_df_padding_sanity_test'
+]
 
-_GRPC_CLIENT_TEST_CASES_FOR_HTTP2_SERVER_TEST_CASES = { 'data_frame_padding': 'large_unary', 'no_df_padding_sanity_test': 'large_unary' }
+_GRPC_CLIENT_TEST_CASES_FOR_HTTP2_SERVER_TEST_CASES = {
+    'data_frame_padding': 'large_unary',
+    'no_df_padding_sanity_test': 'large_unary'
+}
 
-_HTTP2_SERVER_TEST_CASES_THAT_USE_GRPC_CLIENTS = _GRPC_CLIENT_TEST_CASES_FOR_HTTP2_SERVER_TEST_CASES.keys()
+_HTTP2_SERVER_TEST_CASES_THAT_USE_GRPC_CLIENTS = _GRPC_CLIENT_TEST_CASES_FOR_HTTP2_SERVER_TEST_CASES.keys(
+)
 
-_LANGUAGES_WITH_HTTP2_CLIENTS_FOR_HTTP2_SERVER_TEST_CASES = ['java', 'go', 'python', 'c++']
+_LANGUAGES_WITH_HTTP2_CLIENTS_FOR_HTTP2_SERVER_TEST_CASES = [
+    'java', 'go', 'python', 'c++'
+]
 
 DOCKER_WORKDIR_ROOT = '/var/local/git/grpc'
 
+
 def docker_run_cmdline(cmdline, image, docker_args=[], cwd=None, environ=None):
-  """Wraps given cmdline array to create 'docker run' cmdline from it."""
-  docker_cmdline = ['docker', 'run', '-i', '--rm=true']
+    """Wraps given cmdline array to create 'docker run' cmdline from it."""
+    docker_cmdline = ['docker', 'run', '-i', '--rm=true']
 
-  # turn environ into -e docker args
-  if environ:
-    for k,v in environ.items():
-      docker_cmdline += ['-e', '%s=%s' % (k,v)]
+    # turn environ into -e docker args
+    if environ:
+        for k, v in environ.items():
+            docker_cmdline += ['-e', '%s=%s' % (k, v)]
 
-  # set working directory
-  workdir = DOCKER_WORKDIR_ROOT
-  if cwd:
-    workdir = os.path.join(workdir, cwd)
-  docker_cmdline += ['-w', workdir]
+    # set working directory
+    workdir = DOCKER_WORKDIR_ROOT
+    if cwd:
+        workdir = os.path.join(workdir, cwd)
+    docker_cmdline += ['-w', workdir]
 
-  docker_cmdline += docker_args + [image] + cmdline
-  return docker_cmdline
+    docker_cmdline += docker_args + [image] + cmdline
+    return docker_cmdline
 
 
 def manual_cmdline(docker_cmdline, docker_image):
-  """Returns docker cmdline adjusted for manual invocation."""
-  print_cmdline = []
-  for item in docker_cmdline:
-    if item.startswith('--name='):
-      continue
-    if item == docker_image:
-      item = "$docker_image"
-    item = item.replace('"', '\\"')
-    # add quotes when necessary
-    if any(character.isspace() for character in item):
-      item = "\"%s\"" % item
-    print_cmdline.append(item)
-  return ' '.join(print_cmdline)
+    """Returns docker cmdline adjusted for manual invocation."""
+    print_cmdline = []
+    for item in docker_cmdline:
+        if item.startswith('--name='):
+            continue
+        if item == docker_image:
+            item = "$docker_image"
+        item = item.replace('"', '\\"')
+        # add quotes when necessary
+        if any(character.isspace() for character in item):
+            item = "\"%s\"" % item
+        print_cmdline.append(item)
+    return ' '.join(print_cmdline)
 
 
 def write_cmdlog_maybe(cmdlog, filename):
-  """Returns docker cmdline adjusted for manual invocation."""
-  if cmdlog:
-    with open(filename, 'w') as logfile:
-      logfile.write('#!/bin/bash\n')
-      logfile.writelines("%s\n" % line for line in cmdlog)
-    print('Command log written to file %s' % filename)
+    """Returns docker cmdline adjusted for manual invocation."""
+    if cmdlog:
+        with open(filename, 'w') as logfile:
+            logfile.write('#!/bin/bash\n')
+            logfile.writelines("%s\n" % line for line in cmdlog)
+        print('Command log written to file %s' % filename)
 
 
 def bash_cmdline(cmdline):
-  """Creates bash -c cmdline from args list."""
-  # Use login shell:
-  # * makes error messages clearer if executables are missing
-  return ['bash', '-c', ' '.join(cmdline)]
+    """Creates bash -c cmdline from args list."""
+    # Use login shell:
+    # * makes error messages clearer if executables are missing
+    return ['bash', '-c', ' '.join(cmdline)]
 
 
 def auth_options(language, test_case):
-  """Returns (cmdline, env) tuple with cloud_to_prod_auth test options."""
+    """Returns (cmdline, env) tuple with cloud_to_prod_auth test options."""
 
-  language = str(language)
-  cmdargs = []
-  env = {}
+    language = str(language)
+    cmdargs = []
+    env = {}
 
-  # TODO(jtattermusch): this file path only works inside docker
-  key_filepath = '/root/service_account/GrpcTesting-726eb1347f15.json'
-  oauth_scope_arg = '--oauth_scope=https://www.googleapis.com/auth/xapi.zoo'
-  key_file_arg = '--service_account_key_file=%s' % key_filepath
-  default_account_arg = '--default_service_account=830293263384-compute@developer.gserviceaccount.com'
+    # TODO(jtattermusch): this file path only works inside docker
+    key_filepath = '/root/service_account/GrpcTesting-726eb1347f15.json'
+    oauth_scope_arg = '--oauth_scope=https://www.googleapis.com/auth/xapi.zoo'
+    key_file_arg = '--service_account_key_file=%s' % key_filepath
+    default_account_arg = '--default_service_account=830293263384-compute@developer.gserviceaccount.com'
 
-  if test_case in ['jwt_token_creds', 'per_rpc_creds', 'oauth2_auth_token']:
-    if language in ['csharp', 'csharpcoreclr', 'node', 'php', 'php7', 'python', 'ruby']:
-      env['GOOGLE_APPLICATION_CREDENTIALS'] = key_filepath
-    else:
-      cmdargs += [key_file_arg]
+    if test_case in ['jwt_token_creds', 'per_rpc_creds', 'oauth2_auth_token']:
+        if language in [
+                'csharp', 'csharpcoreclr', 'node', 'php', 'php7', 'python',
+                'ruby'
+        ]:
+            env['GOOGLE_APPLICATION_CREDENTIALS'] = key_filepath
+        else:
+            cmdargs += [key_file_arg]
 
-  if test_case in ['per_rpc_creds', 'oauth2_auth_token']:
-    cmdargs += [oauth_scope_arg]
+    if test_case in ['per_rpc_creds', 'oauth2_auth_token']:
+        cmdargs += [oauth_scope_arg]
 
-  if test_case == 'oauth2_auth_token' and language == 'c++':
-    # C++ oauth2 test uses GCE creds and thus needs to know the default account
-    cmdargs += [default_account_arg]
+    if test_case == 'oauth2_auth_token' and language == 'c++':
+        # C++ oauth2 test uses GCE creds and thus needs to know the default account
+        cmdargs += [default_account_arg]
 
-  if test_case == 'compute_engine_creds':
-    cmdargs += [oauth_scope_arg, default_account_arg]
+    if test_case == 'compute_engine_creds':
+        cmdargs += [oauth_scope_arg, default_account_arg]
 
-  return (cmdargs, env)
+    return (cmdargs, env)
 
 
 def _job_kill_handler(job):
-  if job._spec.container_name:
-    dockerjob.docker_kill(job._spec.container_name)
-    # When the job times out and we decide to kill it,
-    # we need to wait a before restarting the job
-    # to prevent "container name already in use" error.
-    # TODO(jtattermusch): figure out a cleaner way to to this.
-    time.sleep(2)
-
-
-def cloud_to_prod_jobspec(language, test_case, server_host_name,
-                          server_host_detail, docker_image=None, auth=False,
+    if job._spec.container_name:
+        dockerjob.docker_kill(job._spec.container_name)
+        # When the job times out and we decide to kill it,
+        # we need to wait a before restarting the job
+        # to prevent "container name already in use" error.
+        # TODO(jtattermusch): figure out a cleaner way to to this.
+        time.sleep(2)
+
+
+def cloud_to_prod_jobspec(language,
+                          test_case,
+                          server_host_name,
+                          server_host_detail,
+                          docker_image=None,
+                          auth=False,
                           manual_cmd_log=None):
-  """Creates jobspec for cloud-to-prod interop test"""
-  container_name = None
-  cmdargs = [
-      '--server_host=%s' % server_host_detail[0],
-      '--server_host_override=%s' % server_host_detail[1],
-      '--server_port=443',
-      '--use_tls=true',
-      '--test_case=%s' % test_case]
-  environ = dict(language.cloud_to_prod_env(), **language.global_env())
-  if auth:
-    auth_cmdargs, auth_env = auth_options(language, test_case)
-    cmdargs += auth_cmdargs
-    environ.update(auth_env)
-  cmdline = bash_cmdline(language.client_cmd(cmdargs))
-  cwd = language.client_cwd
-
-  if docker_image:
-    container_name = dockerjob.random_name('interop_client_%s' %
-                                           language.safename)
-    cmdline = docker_run_cmdline(cmdline,
-                                 image=docker_image,
-                                 cwd=cwd,
-                                 environ=environ,
-                                 docker_args=['--net=host',
-                                              '--name=%s' % container_name])
-    if manual_cmd_log is not None:
-      if manual_cmd_log == []:
-        manual_cmd_log.append('echo "Testing ${docker_image:=%s}"' % docker_image)
-      manual_cmd_log.append(manual_cmdline(cmdline, docker_image))
-    cwd = None
-    environ = None
-
-  suite_name='cloud_to_prod_auth' if auth else 'cloud_to_prod'
-  test_job = jobset.JobSpec(
-          cmdline=cmdline,
-          cwd=cwd,
-          environ=environ,
-          shortname='%s:%s:%s:%s' % (suite_name, language, server_host_name,
-                                     test_case),
-          timeout_seconds=_TEST_TIMEOUT,
-          flake_retries=4 if args.allow_flakes else 0,
-          timeout_retries=2 if args.allow_flakes else 0,
-          kill_handler=_job_kill_handler)
-  if docker_image:
-    test_job.container_name = container_name
-  return test_job
-
-
-def cloud_to_cloud_jobspec(language, test_case, server_name, server_host,
-                           server_port, docker_image=None, insecure=False,
-                           manual_cmd_log=None):
-  """Creates jobspec for cloud-to-cloud interop test"""
-  interop_only_options = [
-      '--server_host_override=foo.test.google.fr',
-      '--use_tls=%s' % ('false' if insecure else 'true'),
-      '--use_test_ca=true',
-  ]
-
-  client_test_case = test_case
-  if test_case in _HTTP2_SERVER_TEST_CASES_THAT_USE_GRPC_CLIENTS:
-    client_test_case = _GRPC_CLIENT_TEST_CASES_FOR_HTTP2_SERVER_TEST_CASES[test_case]
-  if client_test_case in language.unimplemented_test_cases():
-    print('asking client %s to run unimplemented test case %s' % (repr(language), client_test_case))
-    sys.exit(1)
+    """Creates jobspec for cloud-to-prod interop test"""
+    container_name = None
+    cmdargs = [
+        '--server_host=%s' % server_host_detail[0],
+        '--server_host_override=%s' % server_host_detail[1],
+        '--server_port=443', '--use_tls=true', '--test_case=%s' % test_case
+    ]
+    environ = dict(language.cloud_to_prod_env(), **language.global_env())
+    if auth:
+        auth_cmdargs, auth_env = auth_options(language, test_case)
+        cmdargs += auth_cmdargs
+        environ.update(auth_env)
+    cmdline = bash_cmdline(language.client_cmd(cmdargs))
+    cwd = language.client_cwd
 
-  common_options = [
-      '--test_case=%s' % client_test_case,
-      '--server_host=%s' % server_host,
-      '--server_port=%s' % server_port,
-  ]
+    if docker_image:
+        container_name = dockerjob.random_name('interop_client_%s' %
+                                               language.safename)
+        cmdline = docker_run_cmdline(
+            cmdline,
+            image=docker_image,
+            cwd=cwd,
+            environ=environ,
+            docker_args=['--net=host', '--name=%s' % container_name])
+        if manual_cmd_log is not None:
+            if manual_cmd_log == []:
+                manual_cmd_log.append('echo "Testing ${docker_image:=%s}"' %
+                                      docker_image)
+            manual_cmd_log.append(manual_cmdline(cmdline, docker_image))
+        cwd = None
+        environ = None
+
+    suite_name = 'cloud_to_prod_auth' if auth else 'cloud_to_prod'
+    test_job = jobset.JobSpec(
+        cmdline=cmdline,
+        cwd=cwd,
+        environ=environ,
+        shortname='%s:%s:%s:%s' % (suite_name, language, server_host_name,
+                                   test_case),
+        timeout_seconds=_TEST_TIMEOUT,
+        flake_retries=4 if args.allow_flakes else 0,
+        timeout_retries=2 if args.allow_flakes else 0,
+        kill_handler=_job_kill_handler)
+    if docker_image:
+        test_job.container_name = container_name
+    return test_job
+
+
+def cloud_to_cloud_jobspec(language,
+                           test_case,
+                           server_name,
+                           server_host,
+                           server_port,
+                           docker_image=None,
+                           insecure=False,
+                           manual_cmd_log=None):
+    """Creates jobspec for cloud-to-cloud interop test"""
+    interop_only_options = [
+        '--server_host_override=foo.test.google.fr',
+        '--use_tls=%s' % ('false' if insecure else 'true'),
+        '--use_test_ca=true',
+    ]
 
-  if test_case in _HTTP2_SERVER_TEST_CASES:
+    client_test_case = test_case
     if test_case in _HTTP2_SERVER_TEST_CASES_THAT_USE_GRPC_CLIENTS:
-      client_options = interop_only_options + common_options
-      cmdline = bash_cmdline(language.client_cmd(client_options))
-      cwd = language.client_cwd
-    else:
-      cmdline = bash_cmdline(language.client_cmd_http2interop(common_options))
-      cwd = language.http2_cwd
-  else:
-    cmdline = bash_cmdline(language.client_cmd(common_options+interop_only_options))
-    cwd = language.client_cwd
+        client_test_case = _GRPC_CLIENT_TEST_CASES_FOR_HTTP2_SERVER_TEST_CASES[
+            test_case]
+    if client_test_case in language.unimplemented_test_cases():
+        print('asking client %s to run unimplemented test case %s' %
+              (repr(language), client_test_case))
+        sys.exit(1)
+
+    common_options = [
+        '--test_case=%s' % client_test_case,
+        '--server_host=%s' % server_host,
+        '--server_port=%s' % server_port,
+    ]
 
-  environ = language.global_env()
-  if docker_image and language.safename != 'objc':
-    # we can't run client in docker for objc.
-    container_name = dockerjob.random_name('interop_client_%s' % language.safename)
-    cmdline = docker_run_cmdline(cmdline,
-                                 image=docker_image,
-                                 environ=environ,
-                                 cwd=cwd,
-                                 docker_args=['--net=host',
-                                              '--name=%s' % container_name])
-    if manual_cmd_log is not None:
-      if manual_cmd_log == []:
-        manual_cmd_log.append('echo "Testing ${docker_image:=%s}"' % docker_image)
-      manual_cmd_log.append(manual_cmdline(cmdline, docker_image))
-    cwd = None
-
-  test_job = jobset.JobSpec(
-          cmdline=cmdline,
-          cwd=cwd,
-          environ=environ,
-          shortname='cloud_to_cloud:%s:%s_server:%s' % (language, server_name,
-                                                        test_case),
-          timeout_seconds=_TEST_TIMEOUT,
-          flake_retries=4 if args.allow_flakes else 0,
-          timeout_retries=2 if args.allow_flakes else 0,
-          kill_handler=_job_kill_handler)
-  if docker_image:
-    test_job.container_name = container_name
-  return test_job
+    if test_case in _HTTP2_SERVER_TEST_CASES:
+        if test_case in _HTTP2_SERVER_TEST_CASES_THAT_USE_GRPC_CLIENTS:
+            client_options = interop_only_options + common_options
+            cmdline = bash_cmdline(language.client_cmd(client_options))
+            cwd = language.client_cwd
+        else:
+            cmdline = bash_cmdline(
+                language.client_cmd_http2interop(common_options))
+            cwd = language.http2_cwd
+    else:
+        cmdline = bash_cmdline(
+            language.client_cmd(common_options + interop_only_options))
+        cwd = language.client_cwd
+
+    environ = language.global_env()
+    if docker_image and language.safename != 'objc':
+        # we can't run client in docker for objc.
+        container_name = dockerjob.random_name('interop_client_%s' %
+                                               language.safename)
+        cmdline = docker_run_cmdline(
+            cmdline,
+            image=docker_image,
+            environ=environ,
+            cwd=cwd,
+            docker_args=['--net=host', '--name=%s' % container_name])
+        if manual_cmd_log is not None:
+            if manual_cmd_log == []:
+                manual_cmd_log.append('echo "Testing ${docker_image:=%s}"' %
+                                      docker_image)
+            manual_cmd_log.append(manual_cmdline(cmdline, docker_image))
+        cwd = None
+
+    test_job = jobset.JobSpec(
+        cmdline=cmdline,
+        cwd=cwd,
+        environ=environ,
+        shortname='cloud_to_cloud:%s:%s_server:%s' % (language, server_name,
+                                                      test_case),
+        timeout_seconds=_TEST_TIMEOUT,
+        flake_retries=4 if args.allow_flakes else 0,
+        timeout_retries=2 if args.allow_flakes else 0,
+        kill_handler=_job_kill_handler)
+    if docker_image:
+        test_job.container_name = container_name
+    return test_job
 
 
 def server_jobspec(language, docker_image, insecure=False, manual_cmd_log=None):
-  """Create jobspec for running a server"""
-  container_name = dockerjob.random_name('interop_server_%s' % language.safename)
-  cmdline = bash_cmdline(
-      language.server_cmd(['--port=%s' % _DEFAULT_SERVER_PORT,
-                           '--use_tls=%s' % ('false' if insecure else 'true')]))
-  environ = language.global_env()
-  docker_args = ['--name=%s' % container_name]
-  if language.safename == 'http2':
-    # we are running the http2 interop server. Open next N ports beginning
-    # with the server port. These ports are used for http2 interop test
-    # (one test case per port).
-    docker_args += list(
-        itertools.chain.from_iterable(('-p', str(_DEFAULT_SERVER_PORT + i))
-                                      for i in range(
-                                          len(_HTTP2_SERVER_TEST_CASES))))
-    # Enable docker's healthcheck mechanism.
-    # This runs a Python script inside the container every second. The script
-    # pings the http2 server to verify it is ready. The 'health-retries' flag
-    # specifies the number of consecutive failures before docker will report
-    # the container's status as 'unhealthy'. Prior to the first 'health_retries'
-    # failures or the first success, the status will be 'starting'. 'docker ps'
-    # or 'docker inspect' can be used to see the health of the container on the
-    # command line.
-    docker_args += [
-        '--health-cmd=python test/http2_test/http2_server_health_check.py '
-        '--server_host=%s --server_port=%d'
-        % ('localhost', _DEFAULT_SERVER_PORT),
-        '--health-interval=1s',
-        '--health-retries=5',
-        '--health-timeout=10s',
-    ]
+    """Create jobspec for running a server"""
+    container_name = dockerjob.random_name('interop_server_%s' %
+                                           language.safename)
+    cmdline = bash_cmdline(
+        language.server_cmd([
+            '--port=%s' % _DEFAULT_SERVER_PORT, '--use_tls=%s' % (
+                'false' if insecure else 'true')
+        ]))
+    environ = language.global_env()
+    docker_args = ['--name=%s' % container_name]
+    if language.safename == 'http2':
+        # we are running the http2 interop server. Open next N ports beginning
+        # with the server port. These ports are used for http2 interop test
+        # (one test case per port).
+        docker_args += list(
+            itertools.chain.from_iterable(('-p', str(_DEFAULT_SERVER_PORT + i))
+                                          for i in range(
+                                              len(_HTTP2_SERVER_TEST_CASES))))
+        # Enable docker's healthcheck mechanism.
+        # This runs a Python script inside the container every second. The script
+        # pings the http2 server to verify it is ready. The 'health-retries' flag
+        # specifies the number of consecutive failures before docker will report
+        # the container's status as 'unhealthy'. Prior to the first 'health_retries'
+        # failures or the first success, the status will be 'starting'. 'docker ps'
+        # or 'docker inspect' can be used to see the health of the container on the
+        # command line.
+        docker_args += [
+            '--health-cmd=python test/http2_test/http2_server_health_check.py '
+            '--server_host=%s --server_port=%d' %
+            ('localhost', _DEFAULT_SERVER_PORT),
+            '--health-interval=1s',
+            '--health-retries=5',
+            '--health-timeout=10s',
+        ]
 
-  else:
-    docker_args += ['-p', str(_DEFAULT_SERVER_PORT)]
-
-  docker_cmdline = docker_run_cmdline(cmdline,
-                                      image=docker_image,
-                                      cwd=language.server_cwd,
-                                      environ=environ,
-                                      docker_args=docker_args)
-  if manual_cmd_log is not None:
-      if manual_cmd_log == []:
-        manual_cmd_log.append('echo "Testing ${docker_image:=%s}"' % docker_image)
-      manual_cmd_log.append(manual_cmdline(docker_cmdline, docker_image))
-  server_job = jobset.JobSpec(
-          cmdline=docker_cmdline,
-          environ=environ,
-          shortname='interop_server_%s' % language,
-          timeout_seconds=30*60)
-  server_job.container_name = container_name
-  return server_job
+    else:
+        docker_args += ['-p', str(_DEFAULT_SERVER_PORT)]
+
+    docker_cmdline = docker_run_cmdline(
+        cmdline,
+        image=docker_image,
+        cwd=language.server_cwd,
+        environ=environ,
+        docker_args=docker_args)
+    if manual_cmd_log is not None:
+        if manual_cmd_log == []:
+            manual_cmd_log.append('echo "Testing ${docker_image:=%s}"' %
+                                  docker_image)
+        manual_cmd_log.append(manual_cmdline(docker_cmdline, docker_image))
+    server_job = jobset.JobSpec(
+        cmdline=docker_cmdline,
+        environ=environ,
+        shortname='interop_server_%s' % language,
+        timeout_seconds=30 * 60)
+    server_job.container_name = container_name
+    return server_job
 
 
 def build_interop_image_jobspec(language, tag=None):
-  """Creates jobspec for building interop docker image for a language"""
-  if not tag:
-    tag = 'grpc_interop_%s:%s' % (language.safename, uuid.uuid4())
-  env = {'INTEROP_IMAGE': tag,
-         'BASE_NAME': 'grpc_interop_%s' % language.safename}
-  if not args.travis:
-    env['TTY_FLAG'] = '-t'
-  # This env variable is used to get around the github rate limit
-  # error when running the PHP `composer install` command
-  host_file = '%s/.composer/auth.json' % os.environ['HOME']
-  if language.safename == 'php' and os.path.exists(host_file):
-    env['BUILD_INTEROP_DOCKER_EXTRA_ARGS'] = \
-      '-v %s:/root/.composer/auth.json:ro' % host_file
-  build_job = jobset.JobSpec(
-          cmdline=['tools/run_tests/dockerize/build_interop_image.sh'],
-          environ=env,
-          shortname='build_docker_%s' % (language),
-          timeout_seconds=30*60)
-  build_job.tag = tag
-  return build_job
+    """Creates jobspec for building interop docker image for a language"""
+    if not tag:
+        tag = 'grpc_interop_%s:%s' % (language.safename, uuid.uuid4())
+    env = {
+        'INTEROP_IMAGE': tag,
+        'BASE_NAME': 'grpc_interop_%s' % language.safename
+    }
+    if not args.travis:
+        env['TTY_FLAG'] = '-t'
+    # This env variable is used to get around the github rate limit
+    # error when running the PHP `composer install` command
+    host_file = '%s/.composer/auth.json' % os.environ['HOME']
+    if language.safename == 'php' and os.path.exists(host_file):
+        env['BUILD_INTEROP_DOCKER_EXTRA_ARGS'] = \
+          '-v %s:/root/.composer/auth.json:ro' % host_file
+    build_job = jobset.JobSpec(
+        cmdline=['tools/run_tests/dockerize/build_interop_image.sh'],
+        environ=env,
+        shortname='build_docker_%s' % (language),
+        timeout_seconds=30 * 60)
+    build_job.tag = tag
+    return build_job
 
 
 def aggregate_http2_results(stdout):
-  match = re.search(r'\{"cases[^\]]*\]\}', stdout)
-  if not match:
-    return None
-
-  results = json.loads(match.group(0))
-  skipped = 0
-  passed = 0
-  failed = 0
-  failed_cases = []
-  for case in results['cases']:
-    if case.get('skipped', False):
-      skipped += 1
-    else:
-      if case.get('passed', False):
-        passed += 1
-      else:
-        failed += 1
-        failed_cases.append(case.get('name', "NONAME"))
-  return {
-    'passed': passed,
-    'failed': failed,
-    'skipped': skipped,
-    'failed_cases': ', '.join(failed_cases),
-    'percent': 1.0 * passed / (passed + failed)
-  }
+    match = re.search(r'\{"cases[^\]]*\]\}', stdout)
+    if not match:
+        return None
+
+    results = json.loads(match.group(0))
+    skipped = 0
+    passed = 0
+    failed = 0
+    failed_cases = []
+    for case in results['cases']:
+        if case.get('skipped', False):
+            skipped += 1
+        else:
+            if case.get('passed', False):
+                passed += 1
+            else:
+                failed += 1
+                failed_cases.append(case.get('name', "NONAME"))
+    return {
+        'passed': passed,
+        'failed': failed,
+        'skipped': skipped,
+        'failed_cases': ', '.join(failed_cases),
+        'percent': 1.0 * passed / (passed + failed)
+    }
+
 
 # A dictionary of prod servers to test.
 # Format: server_name: (server_host, server_host_override, errors_allowed)
 # TODO(adelez): implement logic for errors_allowed where if the indicated tests
 # fail, they don't impact the overall test result.
 prod_servers = {
-    'default': ('216.239.32.254',
-                'grpc-test.sandbox.googleapis.com', False),
-    'gateway_v2': ('216.239.32.254',
-                   'grpc-test2.sandbox.googleapis.com', True),
+    'default': ('216.239.32.254', 'grpc-test.sandbox.googleapis.com', False),
+    'gateway_v2': ('216.239.32.254', 'grpc-test2.sandbox.googleapis.com', True),
     'cloud_gateway': ('216.239.32.255', 'grpc-test.sandbox.googleapis.com',
                       False),
     'cloud_gateway_v2': ('216.239.32.255', 'grpc-test2.sandbox.googleapis.com',
                          True),
-    'gateway_v4': ('216.239.32.254',
-                   'grpc-test4.sandbox.googleapis.com', True),
+    'gateway_v4': ('216.239.32.254', 'grpc-test4.sandbox.googleapis.com', True),
     'cloud_gateway_v4': ('216.239.32.255', 'grpc-test4.sandbox.googleapis.com',
                          True),
 }
 
 argp = argparse.ArgumentParser(description='Run interop tests.')
-argp.add_argument('-l', '--language',
-                  choices=['all'] + sorted(_LANGUAGES),
-                  nargs='+',
-                  default=['all'],
-                  help='Clients to run. Objc client can be only run on OSX.')
+argp.add_argument(
+    '-l',
+    '--language',
+    choices=['all'] + sorted(_LANGUAGES),
+    nargs='+',
+    default=['all'],
+    help='Clients to run. Objc client can be only run on OSX.')
 argp.add_argument('-j', '--jobs', default=multiprocessing.cpu_count(), type=int)
-argp.add_argument('--cloud_to_prod',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help='Run cloud_to_prod tests.')
-argp.add_argument('--cloud_to_prod_auth',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help='Run cloud_to_prod_auth tests.')
-argp.add_argument('--prod_servers',
-                  choices=prod_servers.keys(),
-                  default=['default'],
-                  nargs='+',
-                  help=('The servers to run cloud_to_prod and '
-                        'cloud_to_prod_auth tests against.'))
-argp.add_argument('-s', '--server',
-                  choices=['all'] + sorted(_SERVERS),
-                  nargs='+',
-                  help='Run cloud_to_cloud servers in a separate docker ' +
-                       'image. Servers can only be started automatically if ' +
-                       '--use_docker option is enabled.',
-                  default=[])
-argp.add_argument('--override_server',
-                  action='append',
-                  type=lambda kv: kv.split('='),
-                  help='Use servername=HOST:PORT to explicitly specify a server. E.g. csharp=localhost:50000',
-                  default=[])
-argp.add_argument('-t', '--travis',
-                  default=False,
-                  action='store_const',
-                  const=True)
-argp.add_argument('-v', '--verbose',
-                  default=False,
-                  action='store_const',
-                  const=True)
-argp.add_argument('--use_docker',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help='Run all the interop tests under docker. That provides ' +
-                  'additional isolation and prevents the need to install ' +
-                  'language specific prerequisites. Only available on Linux.')
-argp.add_argument('--allow_flakes',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help='Allow flaky tests to show as passing (re-runs failed tests up to five times)')
-argp.add_argument('--manual_run',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help='Prepare things for running interop tests manually. ' +
-                  'Preserve docker images after building them and skip '
-                  'actually running the tests. Only print commands to run by ' +
-                  'hand.')
-argp.add_argument('--http2_interop',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help='Enable HTTP/2 client edge case testing. (Bad client, good server)')
-argp.add_argument('--http2_server_interop',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help='Enable HTTP/2 server edge case testing. (Includes positive and negative tests')
-argp.add_argument('--insecure',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help='Whether to use secure channel.')
-argp.add_argument('--internal_ci',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help=('Put reports into subdirectories to improve '
-                        'presentation of results by Internal CI.'))
-argp.add_argument('--bq_result_table',
-                  default='',
-                  type=str,
-                  nargs='?',
-                  help='Upload test results to a specified BQ table.')
+argp.add_argument(
+    '--cloud_to_prod',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Run cloud_to_prod tests.')
+argp.add_argument(
+    '--cloud_to_prod_auth',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Run cloud_to_prod_auth tests.')
+argp.add_argument(
+    '--prod_servers',
+    choices=prod_servers.keys(),
+    default=['default'],
+    nargs='+',
+    help=('The servers to run cloud_to_prod and '
+          'cloud_to_prod_auth tests against.'))
+argp.add_argument(
+    '-s',
+    '--server',
+    choices=['all'] + sorted(_SERVERS),
+    nargs='+',
+    help='Run cloud_to_cloud servers in a separate docker ' +
+    'image. Servers can only be started automatically if ' +
+    '--use_docker option is enabled.',
+    default=[])
+argp.add_argument(
+    '--override_server',
+    action='append',
+    type=lambda kv: kv.split('='),
+    help='Use servername=HOST:PORT to explicitly specify a server. E.g. csharp=localhost:50000',
+    default=[])
+argp.add_argument(
+    '-t', '--travis', default=False, action='store_const', const=True)
+argp.add_argument(
+    '-v', '--verbose', default=False, action='store_const', const=True)
+argp.add_argument(
+    '--use_docker',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Run all the interop tests under docker. That provides ' +
+    'additional isolation and prevents the need to install ' +
+    'language specific prerequisites. Only available on Linux.')
+argp.add_argument(
+    '--allow_flakes',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Allow flaky tests to show as passing (re-runs failed tests up to five times)'
+)
+argp.add_argument(
+    '--manual_run',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Prepare things for running interop tests manually. ' +
+    'Preserve docker images after building them and skip '
+    'actually running the tests. Only print commands to run by ' + 'hand.')
+argp.add_argument(
+    '--http2_interop',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Enable HTTP/2 client edge case testing. (Bad client, good server)')
+argp.add_argument(
+    '--http2_server_interop',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Enable HTTP/2 server edge case testing. (Includes positive and negative tests'
+)
+argp.add_argument(
+    '--insecure',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Whether to use secure channel.')
+argp.add_argument(
+    '--internal_ci',
+    default=False,
+    action='store_const',
+    const=True,
+    help=('Put reports into subdirectories to improve '
+          'presentation of results by Internal CI.'))
+argp.add_argument(
+    '--bq_result_table',
+    default='',
+    type=str,
+    nargs='?',
+    help='Upload test results to a specified BQ table.')
 args = argp.parse_args()
 
-servers = set(s for s in itertools.chain.from_iterable(_SERVERS
-                                                       if x == 'all' else [x]
-                                                       for x in args.server))
+servers = set(
+    s
+    for s in itertools.chain.from_iterable(_SERVERS if x == 'all' else [x]
+                                           for x in args.server))
 
 if args.use_docker:
-  if not args.travis:
-    print('Seen --use_docker flag, will run interop tests under docker.')
-    print('')
-    print('IMPORTANT: The changes you are testing need to be locally committed')
-    print('because only the committed changes in the current branch will be')
-    print('copied to the docker environment.')
-    time.sleep(5)
+    if not args.travis:
+        print('Seen --use_docker flag, will run interop tests under docker.')
+        print('')
+        print(
+            'IMPORTANT: The changes you are testing need to be locally committed'
+        )
+        print(
+            'because only the committed changes in the current branch will be')
+        print('copied to the docker environment.')
+        time.sleep(5)
 
 if args.manual_run and not args.use_docker:
-  print('--manual_run is only supported with --use_docker option enabled.')
-  sys.exit(1)
+    print('--manual_run is only supported with --use_docker option enabled.')
+    sys.exit(1)
 
 if not args.use_docker and servers:
-  print('Running interop servers is only supported with --use_docker option enabled.')
-  sys.exit(1)
-
+    print(
+        'Running interop servers is only supported with --use_docker option enabled.'
+    )
+    sys.exit(1)
 
 # we want to include everything but objc in 'all'
 # because objc won't run on non-mac platforms
 all_but_objc = set(six.iterkeys(_LANGUAGES)) - set(['objc'])
-languages = set(_LANGUAGES[l]
-                for l in itertools.chain.from_iterable(
-                    all_but_objc if x == 'all' else [x]
-                    for x in args.language))
+languages = set(
+    _LANGUAGES[l]
+    for l in itertools.chain.from_iterable(all_but_objc if x == 'all' else [x]
+                                           for x in args.language))
 
 languages_http2_clients_for_http2_server_interop = set()
 if args.http2_server_interop:
-  languages_http2_clients_for_http2_server_interop = set(
-      _LANGUAGES[l] for l in _LANGUAGES_WITH_HTTP2_CLIENTS_FOR_HTTP2_SERVER_TEST_CASES
-      if 'all' in args.language or l in args.language)
+    languages_http2_clients_for_http2_server_interop = set(
+        _LANGUAGES[l]
+        for l in _LANGUAGES_WITH_HTTP2_CLIENTS_FOR_HTTP2_SERVER_TEST_CASES
+        if 'all' in args.language or l in args.language)
 
 http2Interop = Http2Client() if args.http2_interop else None
 http2InteropServer = Http2Server() if args.http2_server_interop else None
 
-docker_images={}
+docker_images = {}
 if args.use_docker:
-  # languages for which to build docker images
-  languages_to_build = set(
-      _LANGUAGES[k] for k in set([str(l) for l in languages] + [s for s in servers]))
-  languages_to_build = languages_to_build | languages_http2_clients_for_http2_server_interop
-
-  if args.http2_interop:
-    languages_to_build.add(http2Interop)
-
-  if args.http2_server_interop:
-    languages_to_build.add(http2InteropServer)
-
-  build_jobs = []
-  for l in languages_to_build:
-    if str(l) == 'objc':
-      # we don't need to build a docker image for objc
-      continue
-    job = build_interop_image_jobspec(l)
-    docker_images[str(l)] = job.tag
-    build_jobs.append(job)
-
-  if build_jobs:
-    jobset.message('START', 'Building interop docker images.', do_newline=True)
-    if args.verbose:
-      print('Jobs to run: \n%s\n' % '\n'.join(str(j) for j in build_jobs))
+    # languages for which to build docker images
+    languages_to_build = set(
+        _LANGUAGES[k]
+        for k in set([str(l) for l in languages] + [s for s in servers]))
+    languages_to_build = languages_to_build | languages_http2_clients_for_http2_server_interop
 
-    num_failures, _ = jobset.run(
-        build_jobs, newline_on_success=True, maxjobs=args.jobs)
-    if num_failures == 0:
-      jobset.message('SUCCESS', 'All docker images built successfully.',
-                     do_newline=True)
-    else:
-      jobset.message('FAILED', 'Failed to build interop docker images.',
-                     do_newline=True)
-      for image in six.itervalues(docker_images):
-        dockerjob.remove_image(image, skip_nonexistent=True)
-      sys.exit(1)
+    if args.http2_interop:
+        languages_to_build.add(http2Interop)
+
+    if args.http2_server_interop:
+        languages_to_build.add(http2InteropServer)
+
+    build_jobs = []
+    for l in languages_to_build:
+        if str(l) == 'objc':
+            # we don't need to build a docker image for objc
+            continue
+        job = build_interop_image_jobspec(l)
+        docker_images[str(l)] = job.tag
+        build_jobs.append(job)
+
+    if build_jobs:
+        jobset.message(
+            'START', 'Building interop docker images.', do_newline=True)
+        if args.verbose:
+            print('Jobs to run: \n%s\n' % '\n'.join(str(j) for j in build_jobs))
+
+        num_failures, _ = jobset.run(
+            build_jobs, newline_on_success=True, maxjobs=args.jobs)
+        if num_failures == 0:
+            jobset.message(
+                'SUCCESS',
+                'All docker images built successfully.',
+                do_newline=True)
+        else:
+            jobset.message(
+                'FAILED',
+                'Failed to build interop docker images.',
+                do_newline=True)
+            for image in six.itervalues(docker_images):
+                dockerjob.remove_image(image, skip_nonexistent=True)
+            sys.exit(1)
 
 server_manual_cmd_log = [] if args.manual_run else None
 client_manual_cmd_log = [] if args.manual_run else None
@@ -1056,214 +1134,236 @@ client_manual_cmd_log = [] if args.manual_run else None
 server_jobs = {}
 server_addresses = {}
 try:
-  for s in servers:
-    lang = str(s)
-    spec = server_jobspec(_LANGUAGES[lang], docker_images.get(lang),
-                          args.insecure, manual_cmd_log=server_manual_cmd_log)
-    if not args.manual_run:
-      job = dockerjob.DockerJob(spec)
-      server_jobs[lang] = job
-      server_addresses[lang] = ('localhost', job.mapped_port(_DEFAULT_SERVER_PORT))
-    else:
-      # don't run the server, set server port to a placeholder value
-      server_addresses[lang] = ('localhost', '${SERVER_PORT}')
-
-  http2_server_job = None
-  if args.http2_server_interop:
-    # launch a HTTP2 server emulator that creates edge cases
-    lang = str(http2InteropServer)
-    spec = server_jobspec(http2InteropServer, docker_images.get(lang),
-                          manual_cmd_log=server_manual_cmd_log)
-    if not args.manual_run:
-      http2_server_job = dockerjob.DockerJob(spec)
-      server_jobs[lang] = http2_server_job
-    else:
-      # don't run the server, set server port to a placeholder value
-      server_addresses[lang] = ('localhost', '${SERVER_PORT}')
-
-  jobs = []
-  if args.cloud_to_prod:
-    if args.insecure:
-      print('TLS is always enabled for cloud_to_prod scenarios.')
-    for server_host_name in args.prod_servers:
-      for language in languages:
-        for test_case in _TEST_CASES:
-          if not test_case in language.unimplemented_test_cases():
-            if not test_case in _SKIP_ADVANCED + _SKIP_COMPRESSION:
-              test_job = cloud_to_prod_jobspec(
-                  language, test_case, server_host_name,
-                  prod_servers[server_host_name],
-                  docker_image=docker_images.get(str(language)),
-                  manual_cmd_log=client_manual_cmd_log)
-              jobs.append(test_job)
-
-      if args.http2_interop:
-        for test_case in _HTTP2_TEST_CASES:
-          test_job = cloud_to_prod_jobspec(
-              http2Interop, test_case, server_host_name,
-              prod_servers[server_host_name],
-              docker_image=docker_images.get(str(http2Interop)),
-              manual_cmd_log=client_manual_cmd_log)
-          jobs.append(test_job)
-
-  if args.cloud_to_prod_auth:
-    if args.insecure:
-      print('TLS is always enabled for cloud_to_prod scenarios.')
-    for server_host_name in args.prod_servers:
-      for language in languages:
-        for test_case in _AUTH_TEST_CASES:
-          if not test_case in language.unimplemented_test_cases():
-            test_job = cloud_to_prod_jobspec(
-                language, test_case, server_host_name,
-                prod_servers[server_host_name],
-                docker_image=docker_images.get(str(language)), auth=True,
-                manual_cmd_log=client_manual_cmd_log)
-            jobs.append(test_job)
-
-  for server in args.override_server:
-    server_name = server[0]
-    (server_host, server_port) = server[1].split(':')
-    server_addresses[server_name] = (server_host, server_port)
-
-  for server_name, server_address in server_addresses.items():
-    (server_host, server_port) = server_address
-    server_language = _LANGUAGES.get(server_name, None)
-    skip_server = []  # test cases unimplemented by server
-    if server_language:
-      skip_server = server_language.unimplemented_test_cases_server()
-    for language in languages:
-      for test_case in _TEST_CASES:
-        if not test_case in language.unimplemented_test_cases():
-          if not test_case in skip_server:
-            test_job = cloud_to_cloud_jobspec(language,
-                                              test_case,
-                                              server_name,
-                                              server_host,
-                                              server_port,
-                                              docker_image=docker_images.get(str(language)),
-                                              insecure=args.insecure,
-                                              manual_cmd_log=client_manual_cmd_log)
-            jobs.append(test_job)
-
-    if args.http2_interop:
-      for test_case in _HTTP2_TEST_CASES:
-        if server_name == "go":
-          # TODO(carl-mastrangelo): Reenable after https://github.com/grpc/grpc-go/issues/434
-          continue
-        test_job = cloud_to_cloud_jobspec(http2Interop,
-                                          test_case,
-                                          server_name,
-                                          server_host,
-                                          server_port,
-                                          docker_image=docker_images.get(str(http2Interop)),
-                                          insecure=args.insecure,
-                                          manual_cmd_log=client_manual_cmd_log)
-        jobs.append(test_job)
-
-  if args.http2_server_interop:
-    if not args.manual_run:
-      http2_server_job.wait_for_healthy(timeout_seconds=600)
-    for language in languages_http2_clients_for_http2_server_interop:
-      for test_case in set(_HTTP2_SERVER_TEST_CASES) - set(_HTTP2_SERVER_TEST_CASES_THAT_USE_GRPC_CLIENTS):
-        offset = sorted(_HTTP2_SERVER_TEST_CASES).index(test_case)
-        server_port = _DEFAULT_SERVER_PORT+offset
+    for s in servers:
+        lang = str(s)
+        spec = server_jobspec(
+            _LANGUAGES[lang],
+            docker_images.get(lang),
+            args.insecure,
+            manual_cmd_log=server_manual_cmd_log)
         if not args.manual_run:
-          server_port = http2_server_job.mapped_port(server_port)
-        test_job = cloud_to_cloud_jobspec(language,
-                                          test_case,
-                                          str(http2InteropServer),
-                                          'localhost',
-                                          server_port,
-                                          docker_image=docker_images.get(str(language)),
-                                          manual_cmd_log=client_manual_cmd_log)
-        jobs.append(test_job)
-    for language in languages:
-      # HTTP2_SERVER_TEST_CASES_THAT_USE_GRPC_CLIENTS is a subset of
-      # HTTP_SERVER_TEST_CASES, in which clients use their gRPC interop clients rather
-      # than specialized http2 clients, reusing existing test implementations.
-      # For example, in the "data_frame_padding" test, use language's gRPC
-      # interop clients and make them think that theyre running "large_unary"
-      # test case. This avoids implementing a new test case in each language.
-      for test_case in _HTTP2_SERVER_TEST_CASES_THAT_USE_GRPC_CLIENTS:
-        if test_case not in language.unimplemented_test_cases():
-          offset = sorted(_HTTP2_SERVER_TEST_CASES).index(test_case)
-          server_port = _DEFAULT_SERVER_PORT+offset
-          if not args.manual_run:
-            server_port = http2_server_job.mapped_port(server_port)
-          if not args.insecure:
-            print(('Creating grpc cient to http2 server test case with insecure connection, even though'
-                   ' args.insecure is False. Http2 test server only supports insecure connections.'))
-          test_job = cloud_to_cloud_jobspec(language,
-                                            test_case,
-                                            str(http2InteropServer),
-                                            'localhost',
-                                            server_port,
-                                            docker_image=docker_images.get(str(language)),
-                                            insecure=True,
-                                            manual_cmd_log=client_manual_cmd_log)
-          jobs.append(test_job)
-
-  if not jobs:
-    print('No jobs to run.')
-    for image in six.itervalues(docker_images):
-      dockerjob.remove_image(image, skip_nonexistent=True)
-    sys.exit(1)
-
-  if args.manual_run:
-    print('All tests will skipped --manual_run option is active.')
-
-  if args.verbose:
-    print('Jobs to run: \n%s\n' % '\n'.join(str(job) for job in jobs))
+            job = dockerjob.DockerJob(spec)
+            server_jobs[lang] = job
+            server_addresses[lang] = ('localhost',
+                                      job.mapped_port(_DEFAULT_SERVER_PORT))
+        else:
+            # don't run the server, set server port to a placeholder value
+            server_addresses[lang] = ('localhost', '${SERVER_PORT}')
+
+    http2_server_job = None
+    if args.http2_server_interop:
+        # launch a HTTP2 server emulator that creates edge cases
+        lang = str(http2InteropServer)
+        spec = server_jobspec(
+            http2InteropServer,
+            docker_images.get(lang),
+            manual_cmd_log=server_manual_cmd_log)
+        if not args.manual_run:
+            http2_server_job = dockerjob.DockerJob(spec)
+            server_jobs[lang] = http2_server_job
+        else:
+            # don't run the server, set server port to a placeholder value
+            server_addresses[lang] = ('localhost', '${SERVER_PORT}')
+
+    jobs = []
+    if args.cloud_to_prod:
+        if args.insecure:
+            print('TLS is always enabled for cloud_to_prod scenarios.')
+        for server_host_name in args.prod_servers:
+            for language in languages:
+                for test_case in _TEST_CASES:
+                    if not test_case in language.unimplemented_test_cases():
+                        if not test_case in _SKIP_ADVANCED + _SKIP_COMPRESSION:
+                            test_job = cloud_to_prod_jobspec(
+                                language,
+                                test_case,
+                                server_host_name,
+                                prod_servers[server_host_name],
+                                docker_image=docker_images.get(str(language)),
+                                manual_cmd_log=client_manual_cmd_log)
+                            jobs.append(test_job)
+
+            if args.http2_interop:
+                for test_case in _HTTP2_TEST_CASES:
+                    test_job = cloud_to_prod_jobspec(
+                        http2Interop,
+                        test_case,
+                        server_host_name,
+                        prod_servers[server_host_name],
+                        docker_image=docker_images.get(str(http2Interop)),
+                        manual_cmd_log=client_manual_cmd_log)
+                    jobs.append(test_job)
+
+    if args.cloud_to_prod_auth:
+        if args.insecure:
+            print('TLS is always enabled for cloud_to_prod scenarios.')
+        for server_host_name in args.prod_servers:
+            for language in languages:
+                for test_case in _AUTH_TEST_CASES:
+                    if not test_case in language.unimplemented_test_cases():
+                        test_job = cloud_to_prod_jobspec(
+                            language,
+                            test_case,
+                            server_host_name,
+                            prod_servers[server_host_name],
+                            docker_image=docker_images.get(str(language)),
+                            auth=True,
+                            manual_cmd_log=client_manual_cmd_log)
+                        jobs.append(test_job)
+
+    for server in args.override_server:
+        server_name = server[0]
+        (server_host, server_port) = server[1].split(':')
+        server_addresses[server_name] = (server_host, server_port)
+
+    for server_name, server_address in server_addresses.items():
+        (server_host, server_port) = server_address
+        server_language = _LANGUAGES.get(server_name, None)
+        skip_server = []  # test cases unimplemented by server
+        if server_language:
+            skip_server = server_language.unimplemented_test_cases_server()
+        for language in languages:
+            for test_case in _TEST_CASES:
+                if not test_case in language.unimplemented_test_cases():
+                    if not test_case in skip_server:
+                        test_job = cloud_to_cloud_jobspec(
+                            language,
+                            test_case,
+                            server_name,
+                            server_host,
+                            server_port,
+                            docker_image=docker_images.get(str(language)),
+                            insecure=args.insecure,
+                            manual_cmd_log=client_manual_cmd_log)
+                        jobs.append(test_job)
+
+        if args.http2_interop:
+            for test_case in _HTTP2_TEST_CASES:
+                if server_name == "go":
+                    # TODO(carl-mastrangelo): Reenable after https://github.com/grpc/grpc-go/issues/434
+                    continue
+                test_job = cloud_to_cloud_jobspec(
+                    http2Interop,
+                    test_case,
+                    server_name,
+                    server_host,
+                    server_port,
+                    docker_image=docker_images.get(str(http2Interop)),
+                    insecure=args.insecure,
+                    manual_cmd_log=client_manual_cmd_log)
+                jobs.append(test_job)
+
+    if args.http2_server_interop:
+        if not args.manual_run:
+            http2_server_job.wait_for_healthy(timeout_seconds=600)
+        for language in languages_http2_clients_for_http2_server_interop:
+            for test_case in set(_HTTP2_SERVER_TEST_CASES) - set(
+                    _HTTP2_SERVER_TEST_CASES_THAT_USE_GRPC_CLIENTS):
+                offset = sorted(_HTTP2_SERVER_TEST_CASES).index(test_case)
+                server_port = _DEFAULT_SERVER_PORT + offset
+                if not args.manual_run:
+                    server_port = http2_server_job.mapped_port(server_port)
+                test_job = cloud_to_cloud_jobspec(
+                    language,
+                    test_case,
+                    str(http2InteropServer),
+                    'localhost',
+                    server_port,
+                    docker_image=docker_images.get(str(language)),
+                    manual_cmd_log=client_manual_cmd_log)
+                jobs.append(test_job)
+        for language in languages:
+            # HTTP2_SERVER_TEST_CASES_THAT_USE_GRPC_CLIENTS is a subset of
+            # HTTP_SERVER_TEST_CASES, in which clients use their gRPC interop clients rather
+            # than specialized http2 clients, reusing existing test implementations.
+            # For example, in the "data_frame_padding" test, use language's gRPC
+            # interop clients and make them think that theyre running "large_unary"
+            # test case. This avoids implementing a new test case in each language.
+            for test_case in _HTTP2_SERVER_TEST_CASES_THAT_USE_GRPC_CLIENTS:
+                if test_case not in language.unimplemented_test_cases():
+                    offset = sorted(_HTTP2_SERVER_TEST_CASES).index(test_case)
+                    server_port = _DEFAULT_SERVER_PORT + offset
+                    if not args.manual_run:
+                        server_port = http2_server_job.mapped_port(server_port)
+                    if not args.insecure:
+                        print((
+                            'Creating grpc cient to http2 server test case with insecure connection, even though'
+                            ' args.insecure is False. Http2 test server only supports insecure connections.'
+                        ))
+                    test_job = cloud_to_cloud_jobspec(
+                        language,
+                        test_case,
+                        str(http2InteropServer),
+                        'localhost',
+                        server_port,
+                        docker_image=docker_images.get(str(language)),
+                        insecure=True,
+                        manual_cmd_log=client_manual_cmd_log)
+                    jobs.append(test_job)
+
+    if not jobs:
+        print('No jobs to run.')
+        for image in six.itervalues(docker_images):
+            dockerjob.remove_image(image, skip_nonexistent=True)
+        sys.exit(1)
+
+    if args.manual_run:
+        print('All tests will skipped --manual_run option is active.')
 
-  num_failures, resultset = jobset.run(jobs, newline_on_success=True,
-                                       maxjobs=args.jobs,
-                                       skip_jobs=args.manual_run)
-  if args.bq_result_table and resultset:
-    upload_interop_results_to_bq(resultset, args.bq_result_table, args)
-  if num_failures:
-    jobset.message('FAILED', 'Some tests failed', do_newline=True)
-  else:
-    jobset.message('SUCCESS', 'All tests passed', do_newline=True)
+    if args.verbose:
+        print('Jobs to run: \n%s\n' % '\n'.join(str(job) for job in jobs))
+
+    num_failures, resultset = jobset.run(
+        jobs,
+        newline_on_success=True,
+        maxjobs=args.jobs,
+        skip_jobs=args.manual_run)
+    if args.bq_result_table and resultset:
+        upload_interop_results_to_bq(resultset, args.bq_result_table, args)
+    if num_failures:
+        jobset.message('FAILED', 'Some tests failed', do_newline=True)
+    else:
+        jobset.message('SUCCESS', 'All tests passed', do_newline=True)
 
-  write_cmdlog_maybe(server_manual_cmd_log, 'interop_server_cmds.sh')
-  write_cmdlog_maybe(client_manual_cmd_log, 'interop_client_cmds.sh')
+    write_cmdlog_maybe(server_manual_cmd_log, 'interop_server_cmds.sh')
+    write_cmdlog_maybe(client_manual_cmd_log, 'interop_client_cmds.sh')
 
-  xml_report_name = _XML_REPORT
-  if args.internal_ci:
-    xml_report_name = _INTERNAL_CL_XML_REPORT
-  report_utils.render_junit_xml_report(resultset, xml_report_name)
+    xml_report_name = _XML_REPORT
+    if args.internal_ci:
+        xml_report_name = _INTERNAL_CL_XML_REPORT
+    report_utils.render_junit_xml_report(resultset, xml_report_name)
 
-  for name, job in resultset.items():
-    if "http2" in name:
-      job[0].http2results = aggregate_http2_results(job[0].message)
+    for name, job in resultset.items():
+        if "http2" in name:
+            job[0].http2results = aggregate_http2_results(job[0].message)
 
-  http2_server_test_cases = (
-      _HTTP2_SERVER_TEST_CASES if args.http2_server_interop else [])
+    http2_server_test_cases = (_HTTP2_SERVER_TEST_CASES
+                               if args.http2_server_interop else [])
 
-  report_utils.render_interop_html_report(
-      set([str(l) for l in languages]), servers, _TEST_CASES, _AUTH_TEST_CASES,
-      _HTTP2_TEST_CASES, http2_server_test_cases, resultset, num_failures,
-      args.cloud_to_prod_auth or args.cloud_to_prod, args.prod_servers,
-      args.http2_interop)
+    report_utils.render_interop_html_report(
+        set([str(l) for l in languages]), servers, _TEST_CASES,
+        _AUTH_TEST_CASES, _HTTP2_TEST_CASES, http2_server_test_cases, resultset,
+        num_failures, args.cloud_to_prod_auth or args.cloud_to_prod,
+        args.prod_servers, args.http2_interop)
 
-  if num_failures:
-    sys.exit(1)
-  else:
-    sys.exit(0)
+    if num_failures:
+        sys.exit(1)
+    else:
+        sys.exit(0)
 except Exception as e:
-  print('exception occurred:')
-  traceback.print_exc(file=sys.stdout)
+    print('exception occurred:')
+    traceback.print_exc(file=sys.stdout)
 finally:
-  # Check if servers are still running.
-  for server, job in server_jobs.items():
-    if not job.is_running():
-      print('Server "%s" has exited prematurely.' % server)
+    # Check if servers are still running.
+    for server, job in server_jobs.items():
+        if not job.is_running():
+            print('Server "%s" has exited prematurely.' % server)
 
-  dockerjob.finish_jobs([j for j in six.itervalues(server_jobs)])
+    dockerjob.finish_jobs([j for j in six.itervalues(server_jobs)])
 
-  for image in six.itervalues(docker_images):
-    if not args.manual_run:
-      print('Removing docker image %s' % image)
-      dockerjob.remove_image(image)
-    else:
-      print('Preserving docker image: %s' % image)
+    for image in six.itervalues(docker_images):
+        if not args.manual_run:
+            print('Removing docker image %s' % image)
+            dockerjob.remove_image(image)
+        else:
+            print('Preserving docker image: %s' % image)
diff --git a/tools/run_tests/run_microbenchmark.py b/tools/run_tests/run_microbenchmark.py
index c136af58cb..561217ceb1 100755
--- a/tools/run_tests/run_microbenchmark.py
+++ b/tools/run_tests/run_microbenchmark.py
@@ -23,26 +23,31 @@ import argparse
 import python_utils.jobset as jobset
 import python_utils.start_port_server as start_port_server
 
-sys.path.append(os.path.join(os.path.dirname(sys.argv[0]), '..', 'profiling', 'microbenchmarks', 'bm_diff'))
+sys.path.append(
+    os.path.join(
+        os.path.dirname(sys.argv[0]), '..', 'profiling', 'microbenchmarks',
+        'bm_diff'))
 import bm_constants
 
 flamegraph_dir = os.path.join(os.path.expanduser('~'), 'FlameGraph')
 
 os.chdir(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
 if not os.path.exists('reports'):
-  os.makedirs('reports')
+    os.makedirs('reports')
 
 start_port_server.start_port_server()
 
+
 def fnize(s):
-  out = ''
-  for c in s:
-    if c in '<>, /':
-      if len(out) and out[-1] == '_': continue
-      out += '_'
-    else:
-      out += c
-  return out
+    out = ''
+    for c in s:
+        if c in '<>, /':
+            if len(out) and out[-1] == '_': continue
+            out += '_'
+        else:
+            out += c
+    return out
+
 
 # index html
 index_html = """
@@ -53,169 +58,202 @@ index_html = """
 <body>
 """
 
+
 def heading(name):
-  global index_html
-  index_html += "<h1>%s</h1>\n" % name
+    global index_html
+    index_html += "<h1>%s</h1>\n" % name
+
 
 def link(txt, tgt):
-  global index_html
-  index_html += "<p><a href=\"%s\">%s</a></p>\n" % (
-      cgi.escape(tgt, quote=True), cgi.escape(txt))
+    global index_html
+    index_html += "<p><a href=\"%s\">%s</a></p>\n" % (
+        cgi.escape(tgt, quote=True), cgi.escape(txt))
+
 
 def text(txt):
-  global index_html
-  index_html += "<p><pre>%s</pre></p>\n" % cgi.escape(txt)
+    global index_html
+    index_html += "<p><pre>%s</pre></p>\n" % cgi.escape(txt)
+
 
 def collect_latency(bm_name, args):
-  """generate latency profiles"""
-  benchmarks = []
-  profile_analysis = []
-  cleanup = []
-
-  heading('Latency Profiles: %s' % bm_name)
-  subprocess.check_call(
-      ['make', bm_name,
-       'CONFIG=basicprof', '-j', '%d' % multiprocessing.cpu_count()])
-  for line in subprocess.check_output(['bins/basicprof/%s' % bm_name,
-                                       '--benchmark_list_tests']).splitlines():
-    link(line, '%s.txt' % fnize(line))
-    benchmarks.append(
-        jobset.JobSpec(['bins/basicprof/%s' % bm_name,
-                        '--benchmark_filter=^%s$' % line,
-                        '--benchmark_min_time=0.05'],
-                       environ={'LATENCY_TRACE': '%s.trace' % fnize(line)},
-                       shortname='profile-%s' % fnize(line)))
-    profile_analysis.append(
-        jobset.JobSpec([sys.executable,
-                        'tools/profiling/latency_profile/profile_analyzer.py',
-                        '--source', '%s.trace' % fnize(line), '--fmt', 'simple',
-                        '--out', 'reports/%s.txt' % fnize(line)], timeout_seconds=20*60,
-                        shortname='analyze-%s' % fnize(line)))
-    cleanup.append(jobset.JobSpec(['rm', '%s.trace' % fnize(line)]))
-    # periodically flush out the list of jobs: profile_analysis jobs at least
-    # consume upwards of five gigabytes of ram in some cases, and so analysing
-    # hundreds of them at once is impractical -- but we want at least some
-    # concurrency or the work takes too long
-    if len(benchmarks) >= min(16, multiprocessing.cpu_count()):
-      # run up to half the cpu count: each benchmark can use up to two cores
-      # (one for the microbenchmark, one for the data flush)
-      jobset.run(benchmarks, maxjobs=max(1, multiprocessing.cpu_count()/2))
-      jobset.run(profile_analysis, maxjobs=multiprocessing.cpu_count())
-      jobset.run(cleanup, maxjobs=multiprocessing.cpu_count())
-      benchmarks = []
-      profile_analysis = []
-      cleanup = []
-  # run the remaining benchmarks that weren't flushed
-  if len(benchmarks):
-    jobset.run(benchmarks, maxjobs=max(1, multiprocessing.cpu_count()/2))
-    jobset.run(profile_analysis, maxjobs=multiprocessing.cpu_count())
-    jobset.run(cleanup, maxjobs=multiprocessing.cpu_count())
+    """generate latency profiles"""
+    benchmarks = []
+    profile_analysis = []
+    cleanup = []
+
+    heading('Latency Profiles: %s' % bm_name)
+    subprocess.check_call([
+        'make', bm_name, 'CONFIG=basicprof', '-j',
+        '%d' % multiprocessing.cpu_count()
+    ])
+    for line in subprocess.check_output(
+        ['bins/basicprof/%s' % bm_name, '--benchmark_list_tests']).splitlines():
+        link(line, '%s.txt' % fnize(line))
+        benchmarks.append(
+            jobset.JobSpec(
+                [
+                    'bins/basicprof/%s' % bm_name, '--benchmark_filter=^%s$' %
+                    line, '--benchmark_min_time=0.05'
+                ],
+                environ={'LATENCY_TRACE': '%s.trace' % fnize(line)},
+                shortname='profile-%s' % fnize(line)))
+        profile_analysis.append(
+            jobset.JobSpec(
+                [
+                    sys.executable,
+                    'tools/profiling/latency_profile/profile_analyzer.py',
+                    '--source', '%s.trace' % fnize(line), '--fmt', 'simple',
+                    '--out', 'reports/%s.txt' % fnize(line)
+                ],
+                timeout_seconds=20 * 60,
+                shortname='analyze-%s' % fnize(line)))
+        cleanup.append(jobset.JobSpec(['rm', '%s.trace' % fnize(line)]))
+        # periodically flush out the list of jobs: profile_analysis jobs at least
+        # consume upwards of five gigabytes of ram in some cases, and so analysing
+        # hundreds of them at once is impractical -- but we want at least some
+        # concurrency or the work takes too long
+        if len(benchmarks) >= min(16, multiprocessing.cpu_count()):
+            # run up to half the cpu count: each benchmark can use up to two cores
+            # (one for the microbenchmark, one for the data flush)
+            jobset.run(
+                benchmarks, maxjobs=max(1, multiprocessing.cpu_count() / 2))
+            jobset.run(profile_analysis, maxjobs=multiprocessing.cpu_count())
+            jobset.run(cleanup, maxjobs=multiprocessing.cpu_count())
+            benchmarks = []
+            profile_analysis = []
+            cleanup = []
+    # run the remaining benchmarks that weren't flushed
+    if len(benchmarks):
+        jobset.run(benchmarks, maxjobs=max(1, multiprocessing.cpu_count() / 2))
+        jobset.run(profile_analysis, maxjobs=multiprocessing.cpu_count())
+        jobset.run(cleanup, maxjobs=multiprocessing.cpu_count())
+
 
 def collect_perf(bm_name, args):
-  """generate flamegraphs"""
-  heading('Flamegraphs: %s' % bm_name)
-  subprocess.check_call(
-      ['make', bm_name,
-       'CONFIG=mutrace', '-j', '%d' % multiprocessing.cpu_count()])
-  benchmarks = []
-  profile_analysis = []
-  cleanup = []
-  for line in subprocess.check_output(['bins/mutrace/%s' % bm_name,
-                                       '--benchmark_list_tests']).splitlines():
-    link(line, '%s.svg' % fnize(line))
-    benchmarks.append(
-        jobset.JobSpec(['perf', 'record', '-o', '%s-perf.data' % fnize(line),
-                        '-g', '-F', '997',
-                        'bins/mutrace/%s' % bm_name,
-                        '--benchmark_filter=^%s$' % line,
-                        '--benchmark_min_time=10'],
-                        shortname='perf-%s' % fnize(line)))
-    profile_analysis.append(
-        jobset.JobSpec(['tools/run_tests/performance/process_local_perf_flamegraphs.sh'],
-                       environ = {
-                           'PERF_BASE_NAME': fnize(line),
-                           'OUTPUT_DIR': 'reports',
-                           'OUTPUT_FILENAME': fnize(line),
-                       },
-                       shortname='flame-%s' % fnize(line)))
-    cleanup.append(jobset.JobSpec(['rm', '%s-perf.data' % fnize(line)]))
-    cleanup.append(jobset.JobSpec(['rm', '%s-out.perf' % fnize(line)]))
-    # periodically flush out the list of jobs: temporary space required for this
-    # processing is large
-    if len(benchmarks) >= 20:
-      # run up to half the cpu count: each benchmark can use up to two cores
-      # (one for the microbenchmark, one for the data flush)
-      jobset.run(benchmarks, maxjobs=1)
-      jobset.run(profile_analysis, maxjobs=multiprocessing.cpu_count())
-      jobset.run(cleanup, maxjobs=multiprocessing.cpu_count())
-      benchmarks = []
-      profile_analysis = []
-      cleanup = []
-  # run the remaining benchmarks that weren't flushed
-  if len(benchmarks):
-    jobset.run(benchmarks, maxjobs=1)
-    jobset.run(profile_analysis, maxjobs=multiprocessing.cpu_count())
-    jobset.run(cleanup, maxjobs=multiprocessing.cpu_count())
+    """generate flamegraphs"""
+    heading('Flamegraphs: %s' % bm_name)
+    subprocess.check_call([
+        'make', bm_name, 'CONFIG=mutrace', '-j',
+        '%d' % multiprocessing.cpu_count()
+    ])
+    benchmarks = []
+    profile_analysis = []
+    cleanup = []
+    for line in subprocess.check_output(
+        ['bins/mutrace/%s' % bm_name, '--benchmark_list_tests']).splitlines():
+        link(line, '%s.svg' % fnize(line))
+        benchmarks.append(
+            jobset.JobSpec(
+                [
+                    'perf', 'record', '-o', '%s-perf.data' % fnize(
+                        line), '-g', '-F', '997', 'bins/mutrace/%s' % bm_name,
+                    '--benchmark_filter=^%s$' % line, '--benchmark_min_time=10'
+                ],
+                shortname='perf-%s' % fnize(line)))
+        profile_analysis.append(
+            jobset.JobSpec(
+                [
+                    'tools/run_tests/performance/process_local_perf_flamegraphs.sh'
+                ],
+                environ={
+                    'PERF_BASE_NAME': fnize(line),
+                    'OUTPUT_DIR': 'reports',
+                    'OUTPUT_FILENAME': fnize(line),
+                },
+                shortname='flame-%s' % fnize(line)))
+        cleanup.append(jobset.JobSpec(['rm', '%s-perf.data' % fnize(line)]))
+        cleanup.append(jobset.JobSpec(['rm', '%s-out.perf' % fnize(line)]))
+        # periodically flush out the list of jobs: temporary space required for this
+        # processing is large
+        if len(benchmarks) >= 20:
+            # run up to half the cpu count: each benchmark can use up to two cores
+            # (one for the microbenchmark, one for the data flush)
+            jobset.run(benchmarks, maxjobs=1)
+            jobset.run(profile_analysis, maxjobs=multiprocessing.cpu_count())
+            jobset.run(cleanup, maxjobs=multiprocessing.cpu_count())
+            benchmarks = []
+            profile_analysis = []
+            cleanup = []
+    # run the remaining benchmarks that weren't flushed
+    if len(benchmarks):
+        jobset.run(benchmarks, maxjobs=1)
+        jobset.run(profile_analysis, maxjobs=multiprocessing.cpu_count())
+        jobset.run(cleanup, maxjobs=multiprocessing.cpu_count())
+
 
 def run_summary(bm_name, cfg, base_json_name):
-  subprocess.check_call(
-      ['make', bm_name,
-       'CONFIG=%s' % cfg, '-j', '%d' % multiprocessing.cpu_count()])
-  cmd = ['bins/%s/%s' % (cfg, bm_name),
-         '--benchmark_out=%s.%s.json' % (base_json_name, cfg),
-         '--benchmark_out_format=json']
-  if args.summary_time is not None:
-    cmd += ['--benchmark_min_time=%d' % args.summary_time]
-  return subprocess.check_output(cmd)
+    subprocess.check_call([
+        'make', bm_name, 'CONFIG=%s' % cfg, '-j',
+        '%d' % multiprocessing.cpu_count()
+    ])
+    cmd = [
+        'bins/%s/%s' % (cfg, bm_name), '--benchmark_out=%s.%s.json' %
+        (base_json_name, cfg), '--benchmark_out_format=json'
+    ]
+    if args.summary_time is not None:
+        cmd += ['--benchmark_min_time=%d' % args.summary_time]
+    return subprocess.check_output(cmd)
+
 
 def collect_summary(bm_name, args):
-  heading('Summary: %s [no counters]' % bm_name)
-  text(run_summary(bm_name, 'opt', bm_name))
-  heading('Summary: %s [with counters]' % bm_name)
-  text(run_summary(bm_name, 'counters', bm_name))
-  if args.bigquery_upload:
-    with open('%s.csv' % bm_name, 'w') as f:
-      f.write(subprocess.check_output(['tools/profiling/microbenchmarks/bm2bq.py',
-                                       '%s.counters.json' % bm_name,
-                                       '%s.opt.json' % bm_name]))
-    subprocess.check_call(['bq', 'load', 'microbenchmarks.microbenchmarks', '%s.csv' % bm_name])
+    heading('Summary: %s [no counters]' % bm_name)
+    text(run_summary(bm_name, 'opt', bm_name))
+    heading('Summary: %s [with counters]' % bm_name)
+    text(run_summary(bm_name, 'counters', bm_name))
+    if args.bigquery_upload:
+        with open('%s.csv' % bm_name, 'w') as f:
+            f.write(
+                subprocess.check_output([
+                    'tools/profiling/microbenchmarks/bm2bq.py',
+                    '%s.counters.json' % bm_name, '%s.opt.json' % bm_name
+                ]))
+        subprocess.check_call([
+            'bq', 'load', 'microbenchmarks.microbenchmarks', '%s.csv' % bm_name
+        ])
+
 
 collectors = {
-  'latency': collect_latency,
-  'perf': collect_perf,
-  'summary': collect_summary,
+    'latency': collect_latency,
+    'perf': collect_perf,
+    'summary': collect_summary,
 }
 
 argp = argparse.ArgumentParser(description='Collect data from microbenchmarks')
-argp.add_argument('-c', '--collect',
-                  choices=sorted(collectors.keys()),
-                  nargs='*',
-                  default=sorted(collectors.keys()),
-                  help='Which collectors should be run against each benchmark')
-argp.add_argument('-b', '--benchmarks',
-                  choices=bm_constants._AVAILABLE_BENCHMARK_TESTS,
-                  default=bm_constants._AVAILABLE_BENCHMARK_TESTS,
-                  nargs='+',
-                  type=str,
-                  help='Which microbenchmarks should be run')
-argp.add_argument('--bigquery_upload',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help='Upload results from summary collection to bigquery')
-argp.add_argument('--summary_time',
-                  default=None,
-                  type=int,
-                  help='Minimum time to run benchmarks for the summary collection')
+argp.add_argument(
+    '-c',
+    '--collect',
+    choices=sorted(collectors.keys()),
+    nargs='*',
+    default=sorted(collectors.keys()),
+    help='Which collectors should be run against each benchmark')
+argp.add_argument(
+    '-b',
+    '--benchmarks',
+    choices=bm_constants._AVAILABLE_BENCHMARK_TESTS,
+    default=bm_constants._AVAILABLE_BENCHMARK_TESTS,
+    nargs='+',
+    type=str,
+    help='Which microbenchmarks should be run')
+argp.add_argument(
+    '--bigquery_upload',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Upload results from summary collection to bigquery')
+argp.add_argument(
+    '--summary_time',
+    default=None,
+    type=int,
+    help='Minimum time to run benchmarks for the summary collection')
 args = argp.parse_args()
 
 try:
-  for collect in args.collect:
-    for bm_name in args.benchmarks:
-      collectors[collect](bm_name, args)
+    for collect in args.collect:
+        for bm_name in args.benchmarks:
+            collectors[collect](bm_name, args)
 finally:
-  if not os.path.exists('reports'):
-    os.makedirs('reports')
-  index_html += "</body>\n</html>\n"
-  with open('reports/index.html', 'w') as f:
-    f.write(index_html)
+    if not os.path.exists('reports'):
+        os.makedirs('reports')
+    index_html += "</body>\n</html>\n"
+    with open('reports/index.html', 'w') as f:
+        f.write(index_html)
diff --git a/tools/run_tests/run_performance_tests.py b/tools/run_tests/run_performance_tests.py
index aa305be466..03b684b318 100755
--- a/tools/run_tests/run_performance_tests.py
+++ b/tools/run_tests/run_performance_tests.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Run performance tests locally or remotely."""
 
 from __future__ import print_function
@@ -37,566 +36,666 @@ import performance.scenario_config as scenario_config
 import python_utils.jobset as jobset
 import python_utils.report_utils as report_utils
 
-
 _ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
 os.chdir(_ROOT)
 
-
 _REMOTE_HOST_USERNAME = 'jenkins'
 
 
 class QpsWorkerJob:
-  """Encapsulates a qps worker server job."""
-
-  def __init__(self, spec, language, host_and_port, perf_file_base_name=None):
-    self._spec = spec
-    self.language = language
-    self.host_and_port = host_and_port
-    self._job = None
-    self.perf_file_base_name = perf_file_base_name
-
-  def start(self):
-    self._job = jobset.Job(self._spec, newline_on_success=True, travis=True, add_env={})
-
-  def is_running(self):
-    """Polls a job and returns True if given job is still running."""
-    return self._job and self._job.state() == jobset._RUNNING
-
-  def kill(self):
-    if self._job:
-      self._job.kill()
-      self._job = None
-
-
-def create_qpsworker_job(language, shortname=None, port=10000, remote_host=None, perf_cmd=None):
-  cmdline = (language.worker_cmdline() + ['--driver_port=%s' % port])
-
-  if remote_host:
-    host_and_port='%s:%s' % (remote_host, port)
-  else:
-    host_and_port='localhost:%s' % port
-
-  perf_file_base_name = None
-  if perf_cmd:
-    perf_file_base_name = '%s-%s' % (host_and_port, shortname)
-    # specify -o output file so perf.data gets collected when worker stopped
-    cmdline = perf_cmd + ['-o', '%s-perf.data' % perf_file_base_name] + cmdline
-
-  worker_timeout = 3 * 60
-  if remote_host:
-    user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, remote_host)
-    ssh_cmd = ['ssh']
-    cmdline = ['timeout', '%s' % (worker_timeout + 30)] + cmdline
-    ssh_cmd.extend([str(user_at_host), 'cd ~/performance_workspace/grpc/ && python tools/run_tests/start_port_server.py && %s' % ' '.join(cmdline)])
-    cmdline = ssh_cmd
-
-  jobspec = jobset.JobSpec(
-      cmdline=cmdline,
-      shortname=shortname,
-      timeout_seconds=worker_timeout,  # workers get restarted after each scenario
-      verbose_success=True)
-  return QpsWorkerJob(jobspec, language, host_and_port, perf_file_base_name)
-
-
-def create_scenario_jobspec(scenario_json, workers, remote_host=None,
-                            bq_result_table=None, server_cpu_load=0):
-  """Runs one scenario using QPS driver."""
-  # setting QPS_WORKERS env variable here makes sure it works with SSH too.
-  cmd = 'QPS_WORKERS="%s" ' % ','.join(workers)
-  if bq_result_table:
-    cmd += 'BQ_RESULT_TABLE="%s" ' % bq_result_table
-  cmd += 'tools/run_tests/performance/run_qps_driver.sh '
-  cmd += '--scenarios_json=%s ' % pipes.quote(json.dumps({'scenarios': [scenario_json]}))
-  cmd += '--scenario_result_file=scenario_result.json '
-  if server_cpu_load != 0:
-      cmd += '--search_param=offered_load --initial_search_value=1000 --targeted_cpu_load=%d --stride=500 --error_tolerance=0.01' % server_cpu_load
-  if remote_host:
-    user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, remote_host)
-    cmd = 'ssh %s "cd ~/performance_workspace/grpc/ && "%s' % (user_at_host, pipes.quote(cmd))
-
-  return jobset.JobSpec(
-      cmdline=[cmd],
-      shortname='qps_json_driver.%s' % scenario_json['name'],
-      timeout_seconds=12*60,
-      shell=True,
-      verbose_success=True)
+    """Encapsulates a qps worker server job."""
+
+    def __init__(self, spec, language, host_and_port, perf_file_base_name=None):
+        self._spec = spec
+        self.language = language
+        self.host_and_port = host_and_port
+        self._job = None
+        self.perf_file_base_name = perf_file_base_name
+
+    def start(self):
+        self._job = jobset.Job(
+            self._spec, newline_on_success=True, travis=True, add_env={})
+
+    def is_running(self):
+        """Polls a job and returns True if given job is still running."""
+        return self._job and self._job.state() == jobset._RUNNING
+
+    def kill(self):
+        if self._job:
+            self._job.kill()
+            self._job = None
+
+
+def create_qpsworker_job(language,
+                         shortname=None,
+                         port=10000,
+                         remote_host=None,
+                         perf_cmd=None):
+    cmdline = (language.worker_cmdline() + ['--driver_port=%s' % port])
+
+    if remote_host:
+        host_and_port = '%s:%s' % (remote_host, port)
+    else:
+        host_and_port = 'localhost:%s' % port
+
+    perf_file_base_name = None
+    if perf_cmd:
+        perf_file_base_name = '%s-%s' % (host_and_port, shortname)
+        # specify -o output file so perf.data gets collected when worker stopped
+        cmdline = perf_cmd + ['-o', '%s-perf.data' % perf_file_base_name
+                             ] + cmdline
+
+    worker_timeout = 3 * 60
+    if remote_host:
+        user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, remote_host)
+        ssh_cmd = ['ssh']
+        cmdline = ['timeout', '%s' % (worker_timeout + 30)] + cmdline
+        ssh_cmd.extend([
+            str(user_at_host),
+            'cd ~/performance_workspace/grpc/ && python tools/run_tests/start_port_server.py && %s'
+            % ' '.join(cmdline)
+        ])
+        cmdline = ssh_cmd
+
+    jobspec = jobset.JobSpec(
+        cmdline=cmdline,
+        shortname=shortname,
+        timeout_seconds=worker_timeout,  # workers get restarted after each scenario
+        verbose_success=True)
+    return QpsWorkerJob(jobspec, language, host_and_port, perf_file_base_name)
+
+
+def create_scenario_jobspec(scenario_json,
+                            workers,
+                            remote_host=None,
+                            bq_result_table=None,
+                            server_cpu_load=0):
+    """Runs one scenario using QPS driver."""
+    # setting QPS_WORKERS env variable here makes sure it works with SSH too.
+    cmd = 'QPS_WORKERS="%s" ' % ','.join(workers)
+    if bq_result_table:
+        cmd += 'BQ_RESULT_TABLE="%s" ' % bq_result_table
+    cmd += 'tools/run_tests/performance/run_qps_driver.sh '
+    cmd += '--scenarios_json=%s ' % pipes.quote(
+        json.dumps({
+            'scenarios': [scenario_json]
+        }))
+    cmd += '--scenario_result_file=scenario_result.json '
+    if server_cpu_load != 0:
+        cmd += '--search_param=offered_load --initial_search_value=1000 --targeted_cpu_load=%d --stride=500 --error_tolerance=0.01' % server_cpu_load
+    if remote_host:
+        user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, remote_host)
+        cmd = 'ssh %s "cd ~/performance_workspace/grpc/ && "%s' % (
+            user_at_host, pipes.quote(cmd))
+
+    return jobset.JobSpec(
+        cmdline=[cmd],
+        shortname='qps_json_driver.%s' % scenario_json['name'],
+        timeout_seconds=12 * 60,
+        shell=True,
+        verbose_success=True)
 
 
 def create_quit_jobspec(workers, remote_host=None):
-  """Runs quit using QPS driver."""
-  # setting QPS_WORKERS env variable here makes sure it works with SSH too.
-  cmd = 'QPS_WORKERS="%s" bins/opt/qps_json_driver --quit' % ','.join(w.host_and_port for w in workers)
-  if remote_host:
-    user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, remote_host)
-    cmd = 'ssh %s "cd ~/performance_workspace/grpc/ && "%s' % (user_at_host, pipes.quote(cmd))
-
-  return jobset.JobSpec(
-      cmdline=[cmd],
-      shortname='qps_json_driver.quit',
-      timeout_seconds=3*60,
-      shell=True,
-      verbose_success=True)
-
-
-def create_netperf_jobspec(server_host='localhost', client_host=None,
+    """Runs quit using QPS driver."""
+    # setting QPS_WORKERS env variable here makes sure it works with SSH too.
+    cmd = 'QPS_WORKERS="%s" bins/opt/qps_json_driver --quit' % ','.join(
+        w.host_and_port for w in workers)
+    if remote_host:
+        user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, remote_host)
+        cmd = 'ssh %s "cd ~/performance_workspace/grpc/ && "%s' % (
+            user_at_host, pipes.quote(cmd))
+
+    return jobset.JobSpec(
+        cmdline=[cmd],
+        shortname='qps_json_driver.quit',
+        timeout_seconds=3 * 60,
+        shell=True,
+        verbose_success=True)
+
+
+def create_netperf_jobspec(server_host='localhost',
+                           client_host=None,
                            bq_result_table=None):
-  """Runs netperf benchmark."""
-  cmd = 'NETPERF_SERVER_HOST="%s" ' % server_host
-  if bq_result_table:
-    cmd += 'BQ_RESULT_TABLE="%s" ' % bq_result_table
-  if client_host:
-    # If netperf is running remotely, the env variables populated by Jenkins
-    # won't be available on the client, but we need them for uploading results
-    # to BigQuery.
-    jenkins_job_name = os.getenv('JOB_NAME')
-    if jenkins_job_name:
-      cmd += 'JOB_NAME="%s" ' % jenkins_job_name
-    jenkins_build_number = os.getenv('BUILD_NUMBER')
-    if jenkins_build_number:
-      cmd += 'BUILD_NUMBER="%s" ' % jenkins_build_number
-
-  cmd += 'tools/run_tests/performance/run_netperf.sh'
-  if client_host:
-    user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, client_host)
-    cmd = 'ssh %s "cd ~/performance_workspace/grpc/ && "%s' % (user_at_host, pipes.quote(cmd))
-
-  return jobset.JobSpec(
-      cmdline=[cmd],
-      shortname='netperf',
-      timeout_seconds=60,
-      shell=True,
-      verbose_success=True)
+    """Runs netperf benchmark."""
+    cmd = 'NETPERF_SERVER_HOST="%s" ' % server_host
+    if bq_result_table:
+        cmd += 'BQ_RESULT_TABLE="%s" ' % bq_result_table
+    if client_host:
+        # If netperf is running remotely, the env variables populated by Jenkins
+        # won't be available on the client, but we need them for uploading results
+        # to BigQuery.
+        jenkins_job_name = os.getenv('JOB_NAME')
+        if jenkins_job_name:
+            cmd += 'JOB_NAME="%s" ' % jenkins_job_name
+        jenkins_build_number = os.getenv('BUILD_NUMBER')
+        if jenkins_build_number:
+            cmd += 'BUILD_NUMBER="%s" ' % jenkins_build_number
+
+    cmd += 'tools/run_tests/performance/run_netperf.sh'
+    if client_host:
+        user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, client_host)
+        cmd = 'ssh %s "cd ~/performance_workspace/grpc/ && "%s' % (
+            user_at_host, pipes.quote(cmd))
+
+    return jobset.JobSpec(
+        cmdline=[cmd],
+        shortname='netperf',
+        timeout_seconds=60,
+        shell=True,
+        verbose_success=True)
 
 
 def archive_repo(languages):
-  """Archives local version of repo including submodules."""
-  cmdline=['tar', '-cf', '../grpc.tar', '../grpc/']
-  if 'java' in languages:
-    cmdline.append('../grpc-java')
-  if 'go' in languages:
-    cmdline.append('../grpc-go')
-
-  archive_job = jobset.JobSpec(
-      cmdline=cmdline,
-      shortname='archive_repo',
-      timeout_seconds=3*60)
-
-  jobset.message('START', 'Archiving local repository.', do_newline=True)
-  num_failures, _ = jobset.run(
-      [archive_job], newline_on_success=True, maxjobs=1)
-  if num_failures == 0:
-    jobset.message('SUCCESS',
-                   'Archive with local repository created successfully.',
-                   do_newline=True)
-  else:
-    jobset.message('FAILED', 'Failed to archive local repository.',
-                   do_newline=True)
-    sys.exit(1)
+    """Archives local version of repo including submodules."""
+    cmdline = ['tar', '-cf', '../grpc.tar', '../grpc/']
+    if 'java' in languages:
+        cmdline.append('../grpc-java')
+    if 'go' in languages:
+        cmdline.append('../grpc-go')
+
+    archive_job = jobset.JobSpec(
+        cmdline=cmdline, shortname='archive_repo', timeout_seconds=3 * 60)
+
+    jobset.message('START', 'Archiving local repository.', do_newline=True)
+    num_failures, _ = jobset.run(
+        [archive_job], newline_on_success=True, maxjobs=1)
+    if num_failures == 0:
+        jobset.message(
+            'SUCCESS',
+            'Archive with local repository created successfully.',
+            do_newline=True)
+    else:
+        jobset.message(
+            'FAILED', 'Failed to archive local repository.', do_newline=True)
+        sys.exit(1)
 
 
 def prepare_remote_hosts(hosts, prepare_local=False):
-  """Prepares remote hosts (and maybe prepare localhost as well)."""
-  prepare_timeout = 10*60
-  prepare_jobs = []
-  for host in hosts:
-    user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, host)
-    prepare_jobs.append(
-        jobset.JobSpec(
-            cmdline=['tools/run_tests/performance/remote_host_prepare.sh'],
-            shortname='remote_host_prepare.%s' % host,
-            environ = {'USER_AT_HOST': user_at_host},
-            timeout_seconds=prepare_timeout))
-  if prepare_local:
-    # Prepare localhost as well
-    prepare_jobs.append(
-        jobset.JobSpec(
-            cmdline=['tools/run_tests/performance/kill_workers.sh'],
-            shortname='local_prepare',
-            timeout_seconds=prepare_timeout))
-  jobset.message('START', 'Preparing hosts.', do_newline=True)
-  num_failures, _ = jobset.run(
-      prepare_jobs, newline_on_success=True, maxjobs=10)
-  if num_failures == 0:
-    jobset.message('SUCCESS',
-                   'Prepare step completed successfully.',
-                   do_newline=True)
-  else:
-    jobset.message('FAILED', 'Failed to prepare remote hosts.',
-                   do_newline=True)
-    sys.exit(1)
-
-
-def build_on_remote_hosts(hosts, languages=scenario_config.LANGUAGES.keys(), build_local=False):
-  """Builds performance worker on remote hosts (and maybe also locally)."""
-  build_timeout = 15*60
-  # Kokoro VMs (which are local only) do not have caching, so they need more time to build
-  local_build_timeout = 30*60
-  build_jobs = []
-  for host in hosts:
-    user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, host)
-    build_jobs.append(
-        jobset.JobSpec(
-            cmdline=['tools/run_tests/performance/remote_host_build.sh'] + languages,
-            shortname='remote_host_build.%s' % host,
-            environ = {'USER_AT_HOST': user_at_host, 'CONFIG': 'opt'},
-            timeout_seconds=build_timeout))
-  if build_local:
-    # Build locally as well
-    build_jobs.append(
-        jobset.JobSpec(
-            cmdline=['tools/run_tests/performance/build_performance.sh'] + languages,
-            shortname='local_build',
-            environ = {'CONFIG': 'opt'},
-            timeout_seconds=local_build_timeout))
-  jobset.message('START', 'Building.', do_newline=True)
-  num_failures, _ = jobset.run(
-      build_jobs, newline_on_success=True, maxjobs=10)
-  if num_failures == 0:
-    jobset.message('SUCCESS',
-                   'Built successfully.',
-                   do_newline=True)
-  else:
-    jobset.message('FAILED', 'Build failed.',
-                   do_newline=True)
-    sys.exit(1)
+    """Prepares remote hosts (and maybe prepare localhost as well)."""
+    prepare_timeout = 10 * 60
+    prepare_jobs = []
+    for host in hosts:
+        user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, host)
+        prepare_jobs.append(
+            jobset.JobSpec(
+                cmdline=['tools/run_tests/performance/remote_host_prepare.sh'],
+                shortname='remote_host_prepare.%s' % host,
+                environ={'USER_AT_HOST': user_at_host},
+                timeout_seconds=prepare_timeout))
+    if prepare_local:
+        # Prepare localhost as well
+        prepare_jobs.append(
+            jobset.JobSpec(
+                cmdline=['tools/run_tests/performance/kill_workers.sh'],
+                shortname='local_prepare',
+                timeout_seconds=prepare_timeout))
+    jobset.message('START', 'Preparing hosts.', do_newline=True)
+    num_failures, _ = jobset.run(
+        prepare_jobs, newline_on_success=True, maxjobs=10)
+    if num_failures == 0:
+        jobset.message(
+            'SUCCESS', 'Prepare step completed successfully.', do_newline=True)
+    else:
+        jobset.message(
+            'FAILED', 'Failed to prepare remote hosts.', do_newline=True)
+        sys.exit(1)
+
+
+def build_on_remote_hosts(hosts,
+                          languages=scenario_config.LANGUAGES.keys(),
+                          build_local=False):
+    """Builds performance worker on remote hosts (and maybe also locally)."""
+    build_timeout = 15 * 60
+    # Kokoro VMs (which are local only) do not have caching, so they need more time to build
+    local_build_timeout = 30 * 60
+    build_jobs = []
+    for host in hosts:
+        user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, host)
+        build_jobs.append(
+            jobset.JobSpec(
+                cmdline=['tools/run_tests/performance/remote_host_build.sh'] +
+                languages,
+                shortname='remote_host_build.%s' % host,
+                environ={'USER_AT_HOST': user_at_host,
+                         'CONFIG': 'opt'},
+                timeout_seconds=build_timeout))
+    if build_local:
+        # Build locally as well
+        build_jobs.append(
+            jobset.JobSpec(
+                cmdline=['tools/run_tests/performance/build_performance.sh'] +
+                languages,
+                shortname='local_build',
+                environ={'CONFIG': 'opt'},
+                timeout_seconds=local_build_timeout))
+    jobset.message('START', 'Building.', do_newline=True)
+    num_failures, _ = jobset.run(
+        build_jobs, newline_on_success=True, maxjobs=10)
+    if num_failures == 0:
+        jobset.message('SUCCESS', 'Built successfully.', do_newline=True)
+    else:
+        jobset.message('FAILED', 'Build failed.', do_newline=True)
+        sys.exit(1)
 
 
 def create_qpsworkers(languages, worker_hosts, perf_cmd=None):
-  """Creates QPS workers (but does not start them)."""
-  if not worker_hosts:
-    # run two workers locally (for each language)
-    workers=[(None, 10000), (None, 10010)]
-  elif len(worker_hosts) == 1:
-    # run two workers on the remote host (for each language)
-    workers=[(worker_hosts[0], 10000), (worker_hosts[0], 10010)]
-  else:
-    # run one worker per each remote host (for each language)
-    workers=[(worker_host, 10000) for worker_host in worker_hosts]
-
-  return [create_qpsworker_job(language,
-                               shortname= 'qps_worker_%s_%s' % (language,
-                                                                worker_idx),
-                               port=worker[1] + language.worker_port_offset(),
-                               remote_host=worker[0],
-                               perf_cmd=perf_cmd)
-          for language in languages
-          for worker_idx, worker in enumerate(workers)]
-
-
-def perf_report_processor_job(worker_host, perf_base_name, output_filename, flame_graph_reports):
-  print('Creating perf report collection job for %s' % worker_host)
-  cmd = ''
-  if worker_host != 'localhost':
-    user_at_host = "%s@%s" % (_REMOTE_HOST_USERNAME, worker_host)
-    cmd = "USER_AT_HOST=%s OUTPUT_FILENAME=%s OUTPUT_DIR=%s PERF_BASE_NAME=%s\
-         tools/run_tests/performance/process_remote_perf_flamegraphs.sh" \
-          % (user_at_host, output_filename, flame_graph_reports, perf_base_name)
-  else:
-    cmd = "OUTPUT_FILENAME=%s OUTPUT_DIR=%s PERF_BASE_NAME=%s\
-          tools/run_tests/performance/process_local_perf_flamegraphs.sh" \
-          % (output_filename, flame_graph_reports, perf_base_name)
-
-  return jobset.JobSpec(cmdline=cmd,
-                        timeout_seconds=3*60,
-                        shell=True,
-                        verbose_success=True,
-                        shortname='process perf report')
+    """Creates QPS workers (but does not start them)."""
+    if not worker_hosts:
+        # run two workers locally (for each language)
+        workers = [(None, 10000), (None, 10010)]
+    elif len(worker_hosts) == 1:
+        # run two workers on the remote host (for each language)
+        workers = [(worker_hosts[0], 10000), (worker_hosts[0], 10010)]
+    else:
+        # run one worker per each remote host (for each language)
+        workers = [(worker_host, 10000) for worker_host in worker_hosts]
+
+    return [
+        create_qpsworker_job(
+            language,
+            shortname='qps_worker_%s_%s' % (language, worker_idx),
+            port=worker[1] + language.worker_port_offset(),
+            remote_host=worker[0],
+            perf_cmd=perf_cmd)
+        for language in languages for worker_idx, worker in enumerate(workers)
+    ]
+
+
+def perf_report_processor_job(worker_host, perf_base_name, output_filename,
+                              flame_graph_reports):
+    print('Creating perf report collection job for %s' % worker_host)
+    cmd = ''
+    if worker_host != 'localhost':
+        user_at_host = "%s@%s" % (_REMOTE_HOST_USERNAME, worker_host)
+        cmd = "USER_AT_HOST=%s OUTPUT_FILENAME=%s OUTPUT_DIR=%s PERF_BASE_NAME=%stools/run_tests/performance/process_remote_perf_flamegraphs.sh" % (
+            user_at_host, output_filename, flame_graph_reports, perf_base_name)
+    else:
+        cmd = "OUTPUT_FILENAME=%s OUTPUT_DIR=%s PERF_BASE_NAME=%stools/run_tests/performance/process_local_perf_flamegraphs.sh" % (
+            output_filename, flame_graph_reports, perf_base_name)
+
+    return jobset.JobSpec(
+        cmdline=cmd,
+        timeout_seconds=3 * 60,
+        shell=True,
+        verbose_success=True,
+        shortname='process perf report')
 
 
 Scenario = collections.namedtuple('Scenario', 'jobspec workers name')
 
 
-def create_scenarios(languages, workers_by_lang, remote_host=None, regex='.*',
-                     category='all', bq_result_table=None,
-                     netperf=False, netperf_hosts=[], server_cpu_load=0):
-  """Create jobspecs for scenarios to run."""
-  all_workers = [worker
-                 for workers in workers_by_lang.values()
-                 for worker in workers]
-  scenarios = []
-  _NO_WORKERS = []
-
-  if netperf:
-    if not netperf_hosts:
-      netperf_server='localhost'
-      netperf_client=None
-    elif len(netperf_hosts) == 1:
-      netperf_server=netperf_hosts[0]
-      netperf_client=netperf_hosts[0]
-    else:
-      netperf_server=netperf_hosts[0]
-      netperf_client=netperf_hosts[1]
-    scenarios.append(Scenario(
-        create_netperf_jobspec(server_host=netperf_server,
-                               client_host=netperf_client,
-                               bq_result_table=bq_result_table),
-        _NO_WORKERS, 'netperf'))
-
-  for language in languages:
-    for scenario_json in language.scenarios():
-      if re.search(regex, scenario_json['name']):
-        categories = scenario_json.get('CATEGORIES', ['scalable', 'smoketest'])
-        if category in categories or category == 'all':
-          workers = workers_by_lang[str(language)][:]
-          # 'SERVER_LANGUAGE' is an indicator for this script to pick
-          # a server in different language.
-          custom_server_lang = scenario_json.get('SERVER_LANGUAGE', None)
-          custom_client_lang = scenario_json.get('CLIENT_LANGUAGE', None)
-          scenario_json = scenario_config.remove_nonproto_fields(scenario_json)
-          if custom_server_lang and custom_client_lang:
-            raise Exception('Cannot set both custom CLIENT_LANGUAGE and SERVER_LANGUAGE'
+def create_scenarios(languages,
+                     workers_by_lang,
+                     remote_host=None,
+                     regex='.*',
+                     category='all',
+                     bq_result_table=None,
+                     netperf=False,
+                     netperf_hosts=[],
+                     server_cpu_load=0):
+    """Create jobspecs for scenarios to run."""
+    all_workers = [
+        worker for workers in workers_by_lang.values() for worker in workers
+    ]
+    scenarios = []
+    _NO_WORKERS = []
+
+    if netperf:
+        if not netperf_hosts:
+            netperf_server = 'localhost'
+            netperf_client = None
+        elif len(netperf_hosts) == 1:
+            netperf_server = netperf_hosts[0]
+            netperf_client = netperf_hosts[0]
+        else:
+            netperf_server = netperf_hosts[0]
+            netperf_client = netperf_hosts[1]
+        scenarios.append(
+            Scenario(
+                create_netperf_jobspec(
+                    server_host=netperf_server,
+                    client_host=netperf_client,
+                    bq_result_table=bq_result_table), _NO_WORKERS, 'netperf'))
+
+    for language in languages:
+        for scenario_json in language.scenarios():
+            if re.search(regex, scenario_json['name']):
+                categories = scenario_json.get('CATEGORIES',
+                                               ['scalable', 'smoketest'])
+                if category in categories or category == 'all':
+                    workers = workers_by_lang[str(language)][:]
+                    # 'SERVER_LANGUAGE' is an indicator for this script to pick
+                    # a server in different language.
+                    custom_server_lang = scenario_json.get('SERVER_LANGUAGE',
+                                                           None)
+                    custom_client_lang = scenario_json.get('CLIENT_LANGUAGE',
+                                                           None)
+                    scenario_json = scenario_config.remove_nonproto_fields(
+                        scenario_json)
+                    if custom_server_lang and custom_client_lang:
+                        raise Exception(
+                            'Cannot set both custom CLIENT_LANGUAGE and SERVER_LANGUAGE'
                             'in the same scenario')
-          if custom_server_lang:
-            if not workers_by_lang.get(custom_server_lang, []):
-              print('Warning: Skipping scenario %s as' % scenario_json['name'])
-              print('SERVER_LANGUAGE is set to %s yet the language has '
-                    'not been selected with -l' % custom_server_lang)
-              continue
-            for idx in range(0, scenario_json['num_servers']):
-              # replace first X workers by workers of a different language
-              workers[idx] = workers_by_lang[custom_server_lang][idx]
-          if custom_client_lang:
-            if not workers_by_lang.get(custom_client_lang, []):
-              print('Warning: Skipping scenario %s as' % scenario_json['name'])
-              print('CLIENT_LANGUAGE is set to %s yet the language has '
-                    'not been selected with -l' % custom_client_lang)
-              continue
-            for idx in range(scenario_json['num_servers'], len(workers)):
-              # replace all client workers by workers of a different language,
-              # leave num_server workers as they are server workers.
-              workers[idx] = workers_by_lang[custom_client_lang][idx]
-          scenario = Scenario(
-              create_scenario_jobspec(scenario_json,
-                                      [w.host_and_port for w in workers],
-                                      remote_host=remote_host,
-                                      bq_result_table=bq_result_table,
-                                      server_cpu_load=server_cpu_load),
-              workers,
-              scenario_json['name'])
-          scenarios.append(scenario)
-
-  return scenarios
+                    if custom_server_lang:
+                        if not workers_by_lang.get(custom_server_lang, []):
+                            print('Warning: Skipping scenario %s as' %
+                                  scenario_json['name'])
+                            print(
+                                'SERVER_LANGUAGE is set to %s yet the language has '
+                                'not been selected with -l' %
+                                custom_server_lang)
+                            continue
+                        for idx in range(0, scenario_json['num_servers']):
+                            # replace first X workers by workers of a different language
+                            workers[idx] = workers_by_lang[custom_server_lang][
+                                idx]
+                    if custom_client_lang:
+                        if not workers_by_lang.get(custom_client_lang, []):
+                            print('Warning: Skipping scenario %s as' %
+                                  scenario_json['name'])
+                            print(
+                                'CLIENT_LANGUAGE is set to %s yet the language has '
+                                'not been selected with -l' %
+                                custom_client_lang)
+                            continue
+                        for idx in range(scenario_json['num_servers'],
+                                         len(workers)):
+                            # replace all client workers by workers of a different language,
+                            # leave num_server workers as they are server workers.
+                            workers[idx] = workers_by_lang[custom_client_lang][
+                                idx]
+                    scenario = Scenario(
+                        create_scenario_jobspec(
+                            scenario_json, [w.host_and_port for w in workers],
+                            remote_host=remote_host,
+                            bq_result_table=bq_result_table,
+                            server_cpu_load=server_cpu_load), workers,
+                        scenario_json['name'])
+                    scenarios.append(scenario)
+
+    return scenarios
 
 
 def finish_qps_workers(jobs, qpsworker_jobs):
-  """Waits for given jobs to finish and eventually kills them."""
-  retries = 0
-  num_killed = 0
-  while any(job.is_running() for job in jobs):
-    for job in qpsworker_jobs:
-      if job.is_running():
-        print('QPS worker "%s" is still running.' % job.host_and_port)
-    if retries > 10:
-      print('Killing all QPS workers.')
-      for job in jobs:
-        job.kill()
-        num_killed += 1
-    retries += 1
-    time.sleep(3)
-  print('All QPS workers finished.')
-  return num_killed
+    """Waits for given jobs to finish and eventually kills them."""
+    retries = 0
+    num_killed = 0
+    while any(job.is_running() for job in jobs):
+        for job in qpsworker_jobs:
+            if job.is_running():
+                print('QPS worker "%s" is still running.' % job.host_and_port)
+        if retries > 10:
+            print('Killing all QPS workers.')
+            for job in jobs:
+                job.kill()
+                num_killed += 1
+        retries += 1
+        time.sleep(3)
+    print('All QPS workers finished.')
+    return num_killed
+
 
 profile_output_files = []
 
+
 # Collect perf text reports and flamegraphs if perf_cmd was used
 # Note the base names of perf text reports are used when creating and processing
 # perf data. The scenario name uniqifies the output name in the final
 # perf reports directory.
 # Alos, the perf profiles need to be fetched and processed after each scenario
 # in order to avoid clobbering the output files.
-def run_collect_perf_profile_jobs(hosts_and_base_names, scenario_name, flame_graph_reports):
-  perf_report_jobs = []
-  global profile_output_files
-  for host_and_port in hosts_and_base_names:
-    perf_base_name = hosts_and_base_names[host_and_port]
-    output_filename = '%s-%s' % (scenario_name, perf_base_name)
-    # from the base filename, create .svg output filename
-    host = host_and_port.split(':')[0]
-    profile_output_files.append('%s.svg' % output_filename)
-    perf_report_jobs.append(perf_report_processor_job(host, perf_base_name, output_filename, flame_graph_reports))
-
-  jobset.message('START', 'Collecting perf reports from qps workers', do_newline=True)
-  failures, _ = jobset.run(perf_report_jobs, newline_on_success=True, maxjobs=1)
-  jobset.message('END', 'Collecting perf reports from qps workers', do_newline=True)
-  return failures
+def run_collect_perf_profile_jobs(hosts_and_base_names, scenario_name,
+                                  flame_graph_reports):
+    perf_report_jobs = []
+    global profile_output_files
+    for host_and_port in hosts_and_base_names:
+        perf_base_name = hosts_and_base_names[host_and_port]
+        output_filename = '%s-%s' % (scenario_name, perf_base_name)
+        # from the base filename, create .svg output filename
+        host = host_and_port.split(':')[0]
+        profile_output_files.append('%s.svg' % output_filename)
+        perf_report_jobs.append(
+            perf_report_processor_job(host, perf_base_name, output_filename,
+                                      flame_graph_reports))
+
+    jobset.message(
+        'START', 'Collecting perf reports from qps workers', do_newline=True)
+    failures, _ = jobset.run(
+        perf_report_jobs, newline_on_success=True, maxjobs=1)
+    jobset.message(
+        'END', 'Collecting perf reports from qps workers', do_newline=True)
+    return failures
+
 
 def main():
-  argp = argparse.ArgumentParser(description='Run performance tests.')
-  argp.add_argument('-l', '--language',
-                    choices=['all'] + sorted(scenario_config.LANGUAGES.keys()),
-                    nargs='+',
-                    required=True,
-                    help='Languages to benchmark.')
-  argp.add_argument('--remote_driver_host',
-                    default=None,
-                    help='Run QPS driver on given host. By default, QPS driver is run locally.')
-  argp.add_argument('--remote_worker_host',
-                    nargs='+',
-                    default=[],
-                    help='Worker hosts where to start QPS workers.')
-  argp.add_argument('--dry_run',
-                    default=False,
-                    action='store_const',
-                    const=True,
-                    help='Just list scenarios to be run, but don\'t run them.')
-  argp.add_argument('-r', '--regex', default='.*', type=str,
-                    help='Regex to select scenarios to run.')
-  argp.add_argument('--bq_result_table', default=None, type=str,
-                    help='Bigquery "dataset.table" to upload results to.')
-  argp.add_argument('--category',
-                    choices=['smoketest','all','scalable','sweep'],
-                    default='all',
-                    help='Select a category of tests to run.')
-  argp.add_argument('--netperf',
-                    default=False,
-                    action='store_const',
-                    const=True,
-                    help='Run netperf benchmark as one of the scenarios.')
-  argp.add_argument('--server_cpu_load',
-                    default=0, type=int,
-                    help='Select a targeted server cpu load to run. 0 means ignore this flag')
-  argp.add_argument('-x', '--xml_report', default='report.xml', type=str,
-                    help='Name of XML report file to generate.')
-  argp.add_argument('--perf_args',
-                    help=('Example usage: "--perf_args=record -F 99 -g". '
-                          'Wrap QPS workers in a perf command '
-                          'with the arguments to perf specified here. '
-                          '".svg" flame graph profiles will be '
-                          'created for each Qps Worker on each scenario. '
-                          'Files will output to "<repo_root>/<args.flame_graph_reports>" '
-                          'directory. Output files from running the worker '
-                          'under perf are saved in the repo root where its ran. '
-                          'Note that the perf "-g" flag is necessary for '
-                          'flame graphs generation to work (assuming the binary '
-                          'being profiled uses frame pointers, check out '
-                          '"--call-graph dwarf" option using libunwind otherwise.) '
-                          'Also note that the entire "--perf_args=<arg(s)>" must '
-                          'be wrapped in quotes as in the example usage. '
-                          'If the "--perg_args" is unspecified, "perf" will '
-                          'not be used at all. '
-                          'See http://www.brendangregg.com/perf.html '
-                          'for more general perf examples.'))
-  argp.add_argument('--skip_generate_flamegraphs',
-                    default=False,
-                    action='store_const',
-                    const=True,
-                    help=('Turn flame graph generation off. '
-                          'May be useful if "perf_args" arguments do not make sense for '
-                          'generating flamegraphs (e.g., "--perf_args=stat ...")'))
-  argp.add_argument('-f', '--flame_graph_reports', default='perf_reports', type=str,
-                    help='Name of directory to output flame graph profiles to, if any are created.')
-  argp.add_argument('-u', '--remote_host_username', default='', type=str,
-                    help='Use a username that isn\'t "Jenkins" to SSH into remote workers.')
-
-  args = argp.parse_args()
-
-  global _REMOTE_HOST_USERNAME
-  if args.remote_host_username:
-    _REMOTE_HOST_USERNAME = args.remote_host_username
-
-  languages = set(scenario_config.LANGUAGES[l]
-                  for l in itertools.chain.from_iterable(
-                        six.iterkeys(scenario_config.LANGUAGES) if x == 'all'
-                        else [x] for x in args.language))
-
-
-  # Put together set of remote hosts where to run and build
-  remote_hosts = set()
-  if args.remote_worker_host:
-    for host in args.remote_worker_host:
-      remote_hosts.add(host)
-  if args.remote_driver_host:
-    remote_hosts.add(args.remote_driver_host)
-
-  if not args.dry_run:
-    if remote_hosts:
-      archive_repo(languages=[str(l) for l in languages])
-      prepare_remote_hosts(remote_hosts, prepare_local=True)
-    else:
-      prepare_remote_hosts([], prepare_local=True)
-
-  build_local = False
-  if not args.remote_driver_host:
-    build_local = True
-  if not args.dry_run:
-    build_on_remote_hosts(remote_hosts, languages=[str(l) for l in languages], build_local=build_local)
-
-  perf_cmd = None
-  if args.perf_args:
-    print('Running workers under perf profiler')
-    # Expect /usr/bin/perf to be installed here, as is usual
-    perf_cmd = ['/usr/bin/perf']
-    perf_cmd.extend(re.split('\s+', args.perf_args))
-
-  qpsworker_jobs = create_qpsworkers(languages, args.remote_worker_host, perf_cmd=perf_cmd)
-
-  # get list of worker addresses for each language.
-  workers_by_lang = dict([(str(language), []) for language in languages])
-  for job in qpsworker_jobs:
-    workers_by_lang[str(job.language)].append(job)
-
-  scenarios = create_scenarios(languages,
-                             workers_by_lang=workers_by_lang,
-                             remote_host=args.remote_driver_host,
-                             regex=args.regex,
-                             category=args.category,
-                             bq_result_table=args.bq_result_table,
-                             netperf=args.netperf,
-                             netperf_hosts=args.remote_worker_host,
-                             server_cpu_load=args.server_cpu_load)
-
-  if not scenarios:
-    raise Exception('No scenarios to run')
-
-  total_scenario_failures = 0
-  qps_workers_killed = 0
-  merged_resultset = {}
-  perf_report_failures = 0
-
-  for scenario in scenarios:
-    if args.dry_run:
-      print(scenario.name)
-    else:
-      scenario_failures = 0
-      try:
-        for worker in scenario.workers:
-          worker.start()
-        jobs = [scenario.jobspec]
-        if scenario.workers:
-          jobs.append(create_quit_jobspec(scenario.workers, remote_host=args.remote_driver_host))
-        scenario_failures, resultset = jobset.run(jobs, newline_on_success=True, maxjobs=1)
-        total_scenario_failures += scenario_failures
-        merged_resultset = dict(itertools.chain(six.iteritems(merged_resultset),
-                                                six.iteritems(resultset)))
-      finally:
-        # Consider qps workers that need to be killed as failures
-        qps_workers_killed += finish_qps_workers(scenario.workers, qpsworker_jobs)
-
-      if perf_cmd and scenario_failures == 0 and not args.skip_generate_flamegraphs:
-        workers_and_base_names = {}
-        for worker in scenario.workers:
-          if not worker.perf_file_base_name:
-            raise Exception('using perf buf perf report filename is unspecified')
-          workers_and_base_names[worker.host_and_port] = worker.perf_file_base_name
-        perf_report_failures += run_collect_perf_profile_jobs(workers_and_base_names, scenario.name, args.flame_graph_reports)
-
-
-  # Still write the index.html even if some scenarios failed.
-  # 'profile_output_files' will only have names for scenarios that passed
-  if perf_cmd and not args.skip_generate_flamegraphs:
-    # write the index fil to the output dir, with all profiles from all scenarios/workers
-    report_utils.render_perf_profiling_results('%s/index.html' % args.flame_graph_reports, profile_output_files)
-
-  report_utils.render_junit_xml_report(merged_resultset, args.xml_report,
-                                       suite_name='benchmarks')
-
-  if total_scenario_failures > 0 or qps_workers_killed > 0:
-    print('%s scenarios failed and %s qps worker jobs killed' % (total_scenario_failures, qps_workers_killed))
-    sys.exit(1)
-
-  if perf_report_failures > 0:
-    print('%s perf profile collection jobs failed' % perf_report_failures)
-    sys.exit(1)
+    argp = argparse.ArgumentParser(description='Run performance tests.')
+    argp.add_argument(
+        '-l',
+        '--language',
+        choices=['all'] + sorted(scenario_config.LANGUAGES.keys()),
+        nargs='+',
+        required=True,
+        help='Languages to benchmark.')
+    argp.add_argument(
+        '--remote_driver_host',
+        default=None,
+        help='Run QPS driver on given host. By default, QPS driver is run locally.'
+    )
+    argp.add_argument(
+        '--remote_worker_host',
+        nargs='+',
+        default=[],
+        help='Worker hosts where to start QPS workers.')
+    argp.add_argument(
+        '--dry_run',
+        default=False,
+        action='store_const',
+        const=True,
+        help='Just list scenarios to be run, but don\'t run them.')
+    argp.add_argument(
+        '-r',
+        '--regex',
+        default='.*',
+        type=str,
+        help='Regex to select scenarios to run.')
+    argp.add_argument(
+        '--bq_result_table',
+        default=None,
+        type=str,
+        help='Bigquery "dataset.table" to upload results to.')
+    argp.add_argument(
+        '--category',
+        choices=['smoketest', 'all', 'scalable', 'sweep'],
+        default='all',
+        help='Select a category of tests to run.')
+    argp.add_argument(
+        '--netperf',
+        default=False,
+        action='store_const',
+        const=True,
+        help='Run netperf benchmark as one of the scenarios.')
+    argp.add_argument(
+        '--server_cpu_load',
+        default=0,
+        type=int,
+        help='Select a targeted server cpu load to run. 0 means ignore this flag'
+    )
+    argp.add_argument(
+        '-x',
+        '--xml_report',
+        default='report.xml',
+        type=str,
+        help='Name of XML report file to generate.')
+    argp.add_argument(
+        '--perf_args',
+        help=('Example usage: "--perf_args=record -F 99 -g". '
+              'Wrap QPS workers in a perf command '
+              'with the arguments to perf specified here. '
+              '".svg" flame graph profiles will be '
+              'created for each Qps Worker on each scenario. '
+              'Files will output to "<repo_root>/<args.flame_graph_reports>" '
+              'directory. Output files from running the worker '
+              'under perf are saved in the repo root where its ran. '
+              'Note that the perf "-g" flag is necessary for '
+              'flame graphs generation to work (assuming the binary '
+              'being profiled uses frame pointers, check out '
+              '"--call-graph dwarf" option using libunwind otherwise.) '
+              'Also note that the entire "--perf_args=<arg(s)>" must '
+              'be wrapped in quotes as in the example usage. '
+              'If the "--perg_args" is unspecified, "perf" will '
+              'not be used at all. '
+              'See http://www.brendangregg.com/perf.html '
+              'for more general perf examples.'))
+    argp.add_argument(
+        '--skip_generate_flamegraphs',
+        default=False,
+        action='store_const',
+        const=True,
+        help=('Turn flame graph generation off. '
+              'May be useful if "perf_args" arguments do not make sense for '
+              'generating flamegraphs (e.g., "--perf_args=stat ...")'))
+    argp.add_argument(
+        '-f',
+        '--flame_graph_reports',
+        default='perf_reports',
+        type=str,
+        help='Name of directory to output flame graph profiles to, if any are created.'
+    )
+    argp.add_argument(
+        '-u',
+        '--remote_host_username',
+        default='',
+        type=str,
+        help='Use a username that isn\'t "Jenkins" to SSH into remote workers.')
+
+    args = argp.parse_args()
+
+    global _REMOTE_HOST_USERNAME
+    if args.remote_host_username:
+        _REMOTE_HOST_USERNAME = args.remote_host_username
+
+    languages = set(
+        scenario_config.LANGUAGES[l]
+        for l in itertools.chain.from_iterable(
+            six.iterkeys(scenario_config.LANGUAGES) if x == 'all' else [x]
+            for x in args.language))
+
+    # Put together set of remote hosts where to run and build
+    remote_hosts = set()
+    if args.remote_worker_host:
+        for host in args.remote_worker_host:
+            remote_hosts.add(host)
+    if args.remote_driver_host:
+        remote_hosts.add(args.remote_driver_host)
+
+    if not args.dry_run:
+        if remote_hosts:
+            archive_repo(languages=[str(l) for l in languages])
+            prepare_remote_hosts(remote_hosts, prepare_local=True)
+        else:
+            prepare_remote_hosts([], prepare_local=True)
+
+    build_local = False
+    if not args.remote_driver_host:
+        build_local = True
+    if not args.dry_run:
+        build_on_remote_hosts(
+            remote_hosts,
+            languages=[str(l) for l in languages],
+            build_local=build_local)
+
+    perf_cmd = None
+    if args.perf_args:
+        print('Running workers under perf profiler')
+        # Expect /usr/bin/perf to be installed here, as is usual
+        perf_cmd = ['/usr/bin/perf']
+        perf_cmd.extend(re.split('\s+', args.perf_args))
+
+    qpsworker_jobs = create_qpsworkers(
+        languages, args.remote_worker_host, perf_cmd=perf_cmd)
+
+    # get list of worker addresses for each language.
+    workers_by_lang = dict([(str(language), []) for language in languages])
+    for job in qpsworker_jobs:
+        workers_by_lang[str(job.language)].append(job)
+
+    scenarios = create_scenarios(
+        languages,
+        workers_by_lang=workers_by_lang,
+        remote_host=args.remote_driver_host,
+        regex=args.regex,
+        category=args.category,
+        bq_result_table=args.bq_result_table,
+        netperf=args.netperf,
+        netperf_hosts=args.remote_worker_host,
+        server_cpu_load=args.server_cpu_load)
+
+    if not scenarios:
+        raise Exception('No scenarios to run')
+
+    total_scenario_failures = 0
+    qps_workers_killed = 0
+    merged_resultset = {}
+    perf_report_failures = 0
+
+    for scenario in scenarios:
+        if args.dry_run:
+            print(scenario.name)
+        else:
+            scenario_failures = 0
+            try:
+                for worker in scenario.workers:
+                    worker.start()
+                jobs = [scenario.jobspec]
+                if scenario.workers:
+                    jobs.append(
+                        create_quit_jobspec(
+                            scenario.workers,
+                            remote_host=args.remote_driver_host))
+                scenario_failures, resultset = jobset.run(
+                    jobs, newline_on_success=True, maxjobs=1)
+                total_scenario_failures += scenario_failures
+                merged_resultset = dict(
+                    itertools.chain(
+                        six.iteritems(merged_resultset),
+                        six.iteritems(resultset)))
+            finally:
+                # Consider qps workers that need to be killed as failures
+                qps_workers_killed += finish_qps_workers(scenario.workers,
+                                                         qpsworker_jobs)
+
+            if perf_cmd and scenario_failures == 0 and not args.skip_generate_flamegraphs:
+                workers_and_base_names = {}
+                for worker in scenario.workers:
+                    if not worker.perf_file_base_name:
+                        raise Exception(
+                            'using perf buf perf report filename is unspecified')
+                    workers_and_base_names[
+                        worker.host_and_port] = worker.perf_file_base_name
+                perf_report_failures += run_collect_perf_profile_jobs(
+                    workers_and_base_names, scenario.name,
+                    args.flame_graph_reports)
+
+    # Still write the index.html even if some scenarios failed.
+    # 'profile_output_files' will only have names for scenarios that passed
+    if perf_cmd and not args.skip_generate_flamegraphs:
+        # write the index fil to the output dir, with all profiles from all scenarios/workers
+        report_utils.render_perf_profiling_results(
+            '%s/index.html' % args.flame_graph_reports, profile_output_files)
+
+    report_utils.render_junit_xml_report(
+        merged_resultset, args.xml_report, suite_name='benchmarks')
+
+    if total_scenario_failures > 0 or qps_workers_killed > 0:
+        print('%s scenarios failed and %s qps worker jobs killed' %
+              (total_scenario_failures, qps_workers_killed))
+        sys.exit(1)
+
+    if perf_report_failures > 0:
+        print('%s perf profile collection jobs failed' % perf_report_failures)
+        sys.exit(1)
+
 
 if __name__ == "__main__":
-  main()
+    main()
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 471f5d99e7..bd5b8644b3 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Run tests in parallel."""
 
 from __future__ import print_function
@@ -46,36 +45,34 @@ import python_utils.report_utils as report_utils
 import python_utils.watch_dirs as watch_dirs
 import python_utils.start_port_server as start_port_server
 try:
-  from python_utils.upload_test_results import upload_results_to_bq
+    from python_utils.upload_test_results import upload_results_to_bq
 except (ImportError):
-  pass # It's ok to not import because this is only necessary to upload results to BQ.
+    pass  # It's ok to not import because this is only necessary to upload results to BQ.
 
-gcp_utils_dir = os.path.abspath(os.path.join(
-        os.path.dirname(__file__), '../gcp/utils'))
+gcp_utils_dir = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), '../gcp/utils'))
 sys.path.append(gcp_utils_dir)
 
 _ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
 os.chdir(_ROOT)
 
-
 _FORCE_ENVIRON_FOR_WRAPPERS = {
-  'GRPC_VERBOSITY': 'DEBUG',
+    'GRPC_VERBOSITY': 'DEBUG',
 }
 
 _POLLING_STRATEGIES = {
-  'linux': ['epollex', 'epollsig', 'epoll1', 'poll', 'poll-cv'],
-  'mac': ['poll'],
+    'linux': ['epollex', 'epollsig', 'epoll1', 'poll', 'poll-cv'],
+    'mac': ['poll'],
 }
 
-
 BigQueryTestData = collections.namedtuple('BigQueryTestData', 'name flaky cpu')
 
 
 def get_bqtest_data(limit=None):
-  import big_query_utils
+    import big_query_utils
 
-  bq = big_query_utils.create_big_query()
-  query = """
+    bq = big_query_utils.create_big_query()
+    query = """
 SELECT
   filtered_test_name,
   SUM(result != 'PASSED' AND result != 'SKIPPED') > 0 as flaky,
@@ -88,941 +85,1068 @@ SELECT
     [grpc-testing:jenkins_test_results.aggregate_results]
   WHERE
     timestamp >= DATE_ADD(CURRENT_DATE(), -1, "WEEK")
-    AND platform = '"""+platform_string()+"""'
+    AND platform = '""" + platform_string() + """'
     AND NOT REGEXP_MATCH(job_name, '.*portability.*') )
 GROUP BY
   filtered_test_name"""
-  if limit:
-    query += " limit {}".format(limit)
-  query_job = big_query_utils.sync_query_job(bq, 'grpc-testing', query)
-  page = bq.jobs().getQueryResults(
-      pageToken=None,
-      **query_job['jobReference']).execute(num_retries=3)
-  test_data = [BigQueryTestData(row['f'][0]['v'], row['f'][1]['v'] == 'true', float(row['f'][2]['v'])) for row in page['rows']]
-  return test_data
+    if limit:
+        query += " limit {}".format(limit)
+    query_job = big_query_utils.sync_query_job(bq, 'grpc-testing', query)
+    page = bq.jobs().getQueryResults(
+        pageToken=None, **query_job['jobReference']).execute(num_retries=3)
+    test_data = [
+        BigQueryTestData(row['f'][0]['v'], row['f'][1]['v'] == 'true',
+                         float(row['f'][2]['v'])) for row in page['rows']
+    ]
+    return test_data
 
 
 def platform_string():
-  return jobset.platform_string()
+    return jobset.platform_string()
 
 
 _DEFAULT_TIMEOUT_SECONDS = 5 * 60
 
+
 def run_shell_command(cmd, env=None, cwd=None):
-  try:
-    subprocess.check_output(cmd, shell=True, env=env, cwd=cwd)
-  except subprocess.CalledProcessError as e:
-    logging.exception("Error while running command '%s'. Exit status %d. Output:\n%s",
-                       e.cmd, e.returncode, e.output)
-    raise
+    try:
+        subprocess.check_output(cmd, shell=True, env=env, cwd=cwd)
+    except subprocess.CalledProcessError as e:
+        logging.exception(
+            "Error while running command '%s'. Exit status %d. Output:\n%s",
+            e.cmd, e.returncode, e.output)
+        raise
+
 
 def max_parallel_tests_for_current_platform():
-  # Too much test parallelization has only been seen to be a problem
-  # so far on windows.
-  if jobset.platform_string() == 'windows':
-    return 64
-  return 1024
+    # Too much test parallelization has only been seen to be a problem
+    # so far on windows.
+    if jobset.platform_string() == 'windows':
+        return 64
+    return 1024
+
 
 # SimpleConfig: just compile with CONFIG=config, and run the binary to test
 class Config(object):
 
-  def __init__(self, config, environ=None, timeout_multiplier=1, tool_prefix=[], iomgr_platform='native'):
-    if environ is None:
-      environ = {}
-    self.build_config = config
-    self.environ = environ
-    self.environ['CONFIG'] = config
-    self.tool_prefix = tool_prefix
-    self.timeout_multiplier = timeout_multiplier
-    self.iomgr_platform = iomgr_platform
-
-  def job_spec(self, cmdline, timeout_seconds=_DEFAULT_TIMEOUT_SECONDS,
-               shortname=None, environ={}, cpu_cost=1.0, flaky=False):
-    """Construct a jobset.JobSpec for a test under this config
+    def __init__(self,
+                 config,
+                 environ=None,
+                 timeout_multiplier=1,
+                 tool_prefix=[],
+                 iomgr_platform='native'):
+        if environ is None:
+            environ = {}
+        self.build_config = config
+        self.environ = environ
+        self.environ['CONFIG'] = config
+        self.tool_prefix = tool_prefix
+        self.timeout_multiplier = timeout_multiplier
+        self.iomgr_platform = iomgr_platform
+
+    def job_spec(self,
+                 cmdline,
+                 timeout_seconds=_DEFAULT_TIMEOUT_SECONDS,
+                 shortname=None,
+                 environ={},
+                 cpu_cost=1.0,
+                 flaky=False):
+        """Construct a jobset.JobSpec for a test under this config
 
        Args:
          cmdline:      a list of strings specifying the command line the test
                        would like to run
     """
-    actual_environ = self.environ.copy()
-    for k, v in environ.items():
-      actual_environ[k] = v
-    if not flaky and shortname and shortname in flaky_tests:
-      flaky = True
-    if shortname in shortname_to_cpu:
-      cpu_cost = shortname_to_cpu[shortname]
-    return jobset.JobSpec(cmdline=self.tool_prefix + cmdline,
-                          shortname=shortname,
-                          environ=actual_environ,
-                          cpu_cost=cpu_cost,
-                          timeout_seconds=(self.timeout_multiplier * timeout_seconds if timeout_seconds else None),
-                          flake_retries=4 if flaky or args.allow_flakes else 0,
-                          timeout_retries=1 if flaky or args.allow_flakes else 0)
-
-
-def get_c_tests(travis, test_lang) :
-  out = []
-  platforms_str = 'ci_platforms' if travis else 'platforms'
-  with open('tools/run_tests/generated/tests.json') as f:
-    js = json.load(f)
-    return [tgt
-            for tgt in js
-            if tgt['language'] == test_lang and
-                platform_string() in tgt[platforms_str] and
-                not (travis and tgt['flaky'])]
+        actual_environ = self.environ.copy()
+        for k, v in environ.items():
+            actual_environ[k] = v
+        if not flaky and shortname and shortname in flaky_tests:
+            flaky = True
+        if shortname in shortname_to_cpu:
+            cpu_cost = shortname_to_cpu[shortname]
+        return jobset.JobSpec(
+            cmdline=self.tool_prefix + cmdline,
+            shortname=shortname,
+            environ=actual_environ,
+            cpu_cost=cpu_cost,
+            timeout_seconds=(self.timeout_multiplier * timeout_seconds
+                             if timeout_seconds else None),
+            flake_retries=4 if flaky or args.allow_flakes else 0,
+            timeout_retries=1 if flaky or args.allow_flakes else 0)
+
+
+def get_c_tests(travis, test_lang):
+    out = []
+    platforms_str = 'ci_platforms' if travis else 'platforms'
+    with open('tools/run_tests/generated/tests.json') as f:
+        js = json.load(f)
+        return [
+            tgt for tgt in js
+            if tgt['language'] == test_lang and platform_string() in tgt[
+                platforms_str] and not (travis and tgt['flaky'])
+        ]
 
 
 def _check_compiler(compiler, supported_compilers):
-  if compiler not in supported_compilers:
-    raise Exception('Compiler %s not supported (on this platform).' % compiler)
+    if compiler not in supported_compilers:
+        raise Exception('Compiler %s not supported (on this platform).' %
+                        compiler)
 
 
 def _check_arch(arch, supported_archs):
-  if arch not in supported_archs:
-    raise Exception('Architecture %s not supported.' % arch)
+    if arch not in supported_archs:
+        raise Exception('Architecture %s not supported.' % arch)
 
 
 def _is_use_docker_child():
-  """Returns True if running running as a --use_docker child."""
-  return True if os.getenv('RUN_TESTS_COMMAND') else False
+    """Returns True if running running as a --use_docker child."""
+    return True if os.getenv('RUN_TESTS_COMMAND') else False
 
 
-_PythonConfigVars = collections.namedtuple(
-  '_ConfigVars', ['shell', 'builder', 'builder_prefix_arguments',
-                  'venv_relative_python', 'toolchain', 'runner'])
+_PythonConfigVars = collections.namedtuple('_ConfigVars', [
+    'shell', 'builder', 'builder_prefix_arguments', 'venv_relative_python',
+    'toolchain', 'runner'
+])
 
 
 def _python_config_generator(name, major, minor, bits, config_vars):
-  return PythonConfig(
-    name,
-    config_vars.shell + config_vars.builder + config_vars.builder_prefix_arguments + [
-      _python_pattern_function(major=major, minor=minor, bits=bits)] + [
-      name] + config_vars.venv_relative_python + config_vars.toolchain,
-    config_vars.shell + config_vars.runner + [
-      os.path.join(name, config_vars.venv_relative_python[0])])
+    return PythonConfig(
+        name, config_vars.shell + config_vars.builder +
+        config_vars.builder_prefix_arguments + [
+            _python_pattern_function(major=major, minor=minor, bits=bits)
+        ] + [name] + config_vars.venv_relative_python + config_vars.toolchain,
+        config_vars.shell + config_vars.runner +
+        [os.path.join(name, config_vars.venv_relative_python[0])])
 
 
 def _pypy_config_generator(name, major, config_vars):
-  return PythonConfig(
-    name,
-    config_vars.shell + config_vars.builder + config_vars.builder_prefix_arguments + [
-      _pypy_pattern_function(major=major)] + [
-      name] + config_vars.venv_relative_python + config_vars.toolchain,
-    config_vars.shell + config_vars.runner + [
-      os.path.join(name, config_vars.venv_relative_python[0])])
+    return PythonConfig(
+        name,
+        config_vars.shell + config_vars.builder +
+        config_vars.builder_prefix_arguments + [
+            _pypy_pattern_function(major=major)
+        ] + [name] + config_vars.venv_relative_python + config_vars.toolchain,
+        config_vars.shell + config_vars.runner +
+        [os.path.join(name, config_vars.venv_relative_python[0])])
 
 
 def _python_pattern_function(major, minor, bits):
-  # Bit-ness is handled by the test machine's environment
-  if os.name == "nt":
-    if bits == "64":
-      return '/c/Python{major}{minor}/python.exe'.format(
-        major=major, minor=minor, bits=bits)
+    # Bit-ness is handled by the test machine's environment
+    if os.name == "nt":
+        if bits == "64":
+            return '/c/Python{major}{minor}/python.exe'.format(
+                major=major, minor=minor, bits=bits)
+        else:
+            return '/c/Python{major}{minor}_{bits}bits/python.exe'.format(
+                major=major, minor=minor, bits=bits)
     else:
-      return '/c/Python{major}{minor}_{bits}bits/python.exe'.format(
-        major=major, minor=minor, bits=bits)
-  else:
-    return 'python{major}.{minor}'.format(major=major, minor=minor)
+        return 'python{major}.{minor}'.format(major=major, minor=minor)
 
 
 def _pypy_pattern_function(major):
-  if major == '2':
-    return 'pypy'
-  elif major == '3':
-    return 'pypy3'
-  else:
-    raise ValueError("Unknown PyPy major version")
+    if major == '2':
+        return 'pypy'
+    elif major == '3':
+        return 'pypy3'
+    else:
+        raise ValueError("Unknown PyPy major version")
 
 
 class CLanguage(object):
 
-  def __init__(self, make_target, test_lang):
-    self.make_target = make_target
-    self.platform = platform_string()
-    self.test_lang = test_lang
-
-  def configure(self, config, args):
-    self.config = config
-    self.args = args
-    if self.platform == 'windows':
-      _check_compiler(self.args.compiler, ['default', 'cmake', 'cmake_vs2015',
-                                           'cmake_vs2017'])
-      _check_arch(self.args.arch, ['default', 'x64', 'x86'])
-      self._cmake_generator_option = 'Visual Studio 15 2017' if self.args.compiler == 'cmake_vs2017' else 'Visual Studio 14 2015'
-      self._cmake_arch_option = 'x64' if self.args.arch == 'x64' else 'Win32'
-      self._use_cmake = True
-      self._make_options = []
-    elif self.args.compiler == 'cmake':
-      _check_arch(self.args.arch, ['default'])
-      self._use_cmake = True
-      self._docker_distro = 'jessie'
-      self._make_options = []
-    else:
-      self._use_cmake = False
-      self._docker_distro, self._make_options = self._compiler_options(self.args.use_docker,
-                                                                       self.args.compiler)
-    if args.iomgr_platform == "uv":
-      cflags = '-DGRPC_UV -DGRPC_UV_THREAD_CHECK'
-      try:
-        cflags += subprocess.check_output(['pkg-config', '--cflags', 'libuv']).strip() + ' '
-      except (subprocess.CalledProcessError, OSError):
-        pass
-      try:
-        ldflags = subprocess.check_output(['pkg-config', '--libs', 'libuv']).strip() + ' '
-      except (subprocess.CalledProcessError, OSError):
-        ldflags = '-luv '
-      self._make_options += ['EXTRA_CPPFLAGS={}'.format(cflags),
-                             'EXTRA_LDLIBS={}'.format(ldflags)]
-
-  def test_specs(self):
-    out = []
-    binaries = get_c_tests(self.args.travis, self.test_lang)
-    for target in binaries:
-      if self._use_cmake and target.get('boringssl', False):
-        # cmake doesn't build boringssl tests
-        continue
-      auto_timeout_scaling = target.get('auto_timeout_scaling', True)
-      polling_strategies = (_POLLING_STRATEGIES.get(self.platform, ['all'])
-                            if target.get('uses_polling', True)
-                            else ['none'])
-      if self.args.iomgr_platform == 'uv':
-        polling_strategies = ['all']
-      for polling_strategy in polling_strategies:
-        env={'GRPC_DEFAULT_SSL_ROOTS_FILE_PATH':
-                 _ROOT + '/src/core/tsi/test_creds/ca.pem',
-             'GRPC_POLL_STRATEGY': polling_strategy,
-             'GRPC_VERBOSITY': 'DEBUG'}
-        resolver = os.environ.get('GRPC_DNS_RESOLVER', None);
-        if resolver:
-          env['GRPC_DNS_RESOLVER'] = resolver
-        shortname_ext = '' if polling_strategy=='all' else ' GRPC_POLL_STRATEGY=%s' % polling_strategy
-        if polling_strategy in target.get('excluded_poll_engines', []):
-          continue
-
-        timeout_scaling = 1
-        if auto_timeout_scaling:
-          config = self.args.config
-          if ('asan' in config
-              or config == 'msan'
-              or config == 'tsan'
-              or config == 'ubsan'
-              or config == 'helgrind'
-              or config == 'memcheck'):
-            # Scale overall test timeout if running under various sanitizers.
-            # scaling value is based on historical data analysis
-            timeout_scaling *= 3
-          elif polling_strategy == 'poll-cv':
-            # scale test timeout if running with poll-cv
-            # sanitizer and poll-cv scaling is not cumulative to ensure
-            # reasonable timeout values.
-            # TODO(jtattermusch): based on historical data and 5min default
-            # test timeout poll-cv scaling is currently not useful.
-            # Leaving here so it can be reintroduced if the default test timeout
-            # is decreased in the future.
-            timeout_scaling *= 1
-
-        if self.config.build_config in target['exclude_configs']:
-          continue
-        if self.args.iomgr_platform in target.get('exclude_iomgrs', []):
-          continue
+    def __init__(self, make_target, test_lang):
+        self.make_target = make_target
+        self.platform = platform_string()
+        self.test_lang = test_lang
+
+    def configure(self, config, args):
+        self.config = config
+        self.args = args
         if self.platform == 'windows':
-          binary = 'cmake/build/%s/%s.exe' % (_MSBUILD_CONFIG[self.config.build_config], target['name'])
+            _check_compiler(self.args.compiler, [
+                'default', 'cmake', 'cmake_vs2015', 'cmake_vs2017'
+            ])
+            _check_arch(self.args.arch, ['default', 'x64', 'x86'])
+            self._cmake_generator_option = 'Visual Studio 15 2017' if self.args.compiler == 'cmake_vs2017' else 'Visual Studio 14 2015'
+            self._cmake_arch_option = 'x64' if self.args.arch == 'x64' else 'Win32'
+            self._use_cmake = True
+            self._make_options = []
+        elif self.args.compiler == 'cmake':
+            _check_arch(self.args.arch, ['default'])
+            self._use_cmake = True
+            self._docker_distro = 'jessie'
+            self._make_options = []
         else:
-          if self._use_cmake:
-            binary = 'cmake/build/%s' % target['name']
-          else:
-            binary = 'bins/%s/%s' % (self.config.build_config, target['name'])
-        cpu_cost = target['cpu_cost']
-        if cpu_cost == 'capacity':
-          cpu_cost = multiprocessing.cpu_count()
-        if os.path.isfile(binary):
-          list_test_command = None
-          filter_test_command = None
-
-          # these are the flag defined by gtest and benchmark framework to list
-          # and filter test runs. We use them to split each individual test
-          # into its own JobSpec, and thus into its own process.
-          if 'benchmark' in target and target['benchmark']:
-            with open(os.devnull, 'w') as fnull:
-              tests = subprocess.check_output([binary, '--benchmark_list_tests'],
-                                              stderr=fnull)
-            for line in tests.split('\n'):
-              test = line.strip()
-              if not test: continue
-              cmdline = [binary, '--benchmark_filter=%s$' % test] + target['args']
-              out.append(self.config.job_spec(cmdline,
-                                              shortname='%s %s' % (' '.join(cmdline), shortname_ext),
-                                              cpu_cost=cpu_cost,
-                                              timeout_seconds=_DEFAULT_TIMEOUT_SECONDS * timeout_scaling,
-                                              environ=env))
-          elif 'gtest' in target and target['gtest']:
-            # here we parse the output of --gtest_list_tests to build up a complete
-            # list of the tests contained in a binary for each test, we then
-            # add a job to run, filtering for just that test.
-            with open(os.devnull, 'w') as fnull:
-              tests = subprocess.check_output([binary, '--gtest_list_tests'],
-                                              stderr=fnull)
-            base = None
-            for line in tests.split('\n'):
-              i = line.find('#')
-              if i >= 0: line = line[:i]
-              if not line: continue
-              if line[0] != ' ':
-                base = line.strip()
-              else:
-                assert base is not None
-                assert line[1] == ' '
-                test = base + line.strip()
-                cmdline = [binary, '--gtest_filter=%s' % test] + target['args']
-                out.append(self.config.job_spec(cmdline,
-                                                shortname='%s %s' % (' '.join(cmdline), shortname_ext),
-                                                cpu_cost=cpu_cost,
-                                                timeout_seconds=target.get('timeout_seconds', _DEFAULT_TIMEOUT_SECONDS) * timeout_scaling,
-                                                environ=env))
-          else:
-            cmdline = [binary] + target['args']
-            shortname = target.get('shortname', ' '.join(
-                          pipes.quote(arg)
-                          for arg in cmdline))
-            shortname += shortname_ext
-            out.append(self.config.job_spec(cmdline,
-                                            shortname=shortname,
-                                            cpu_cost=cpu_cost,
-                                            flaky=target.get('flaky', False),
-                                            timeout_seconds=target.get('timeout_seconds', _DEFAULT_TIMEOUT_SECONDS) * timeout_scaling,
-                                            environ=env))
-        elif self.args.regex == '.*' or self.platform == 'windows':
-          print('\nWARNING: binary not found, skipping', binary)
-    return sorted(out)
-
-  def make_targets(self):
-    if self.platform == 'windows':
-      # don't build tools on windows just yet
-      return ['buildtests_%s' % self.make_target]
-    return ['buildtests_%s' % self.make_target, 'tools_%s' % self.make_target,
-            'check_epollexclusive']
-
-  def make_options(self):
-    return self._make_options
-
-  def pre_build_steps(self):
-    if self.platform == 'windows':
-      return [['tools\\run_tests\\helper_scripts\\pre_build_cmake.bat',
-               self._cmake_generator_option,
-               self._cmake_arch_option]]
-    elif self._use_cmake:
-      return [['tools/run_tests/helper_scripts/pre_build_cmake.sh']]
-    else:
-      return []
+            self._use_cmake = False
+            self._docker_distro, self._make_options = self._compiler_options(
+                self.args.use_docker, self.args.compiler)
+        if args.iomgr_platform == "uv":
+            cflags = '-DGRPC_UV -DGRPC_UV_THREAD_CHECK'
+            try:
+                cflags += subprocess.check_output(
+                    ['pkg-config', '--cflags', 'libuv']).strip() + ' '
+            except (subprocess.CalledProcessError, OSError):
+                pass
+            try:
+                ldflags = subprocess.check_output(
+                    ['pkg-config', '--libs', 'libuv']).strip() + ' '
+            except (subprocess.CalledProcessError, OSError):
+                ldflags = '-luv '
+            self._make_options += [
+                'EXTRA_CPPFLAGS={}'.format(cflags),
+                'EXTRA_LDLIBS={}'.format(ldflags)
+            ]
+
+    def test_specs(self):
+        out = []
+        binaries = get_c_tests(self.args.travis, self.test_lang)
+        for target in binaries:
+            if self._use_cmake and target.get('boringssl', False):
+                # cmake doesn't build boringssl tests
+                continue
+            auto_timeout_scaling = target.get('auto_timeout_scaling', True)
+            polling_strategies = (
+                _POLLING_STRATEGIES.get(self.platform, ['all'])
+                if target.get('uses_polling', True) else ['none'])
+            if self.args.iomgr_platform == 'uv':
+                polling_strategies = ['all']
+            for polling_strategy in polling_strategies:
+                env = {
+                    'GRPC_DEFAULT_SSL_ROOTS_FILE_PATH':
+                    _ROOT + '/src/core/tsi/test_creds/ca.pem',
+                    'GRPC_POLL_STRATEGY':
+                    polling_strategy,
+                    'GRPC_VERBOSITY':
+                    'DEBUG'
+                }
+                resolver = os.environ.get('GRPC_DNS_RESOLVER', None)
+                if resolver:
+                    env['GRPC_DNS_RESOLVER'] = resolver
+                shortname_ext = '' if polling_strategy == 'all' else ' GRPC_POLL_STRATEGY=%s' % polling_strategy
+                if polling_strategy in target.get('excluded_poll_engines', []):
+                    continue
+
+                timeout_scaling = 1
+                if auto_timeout_scaling:
+                    config = self.args.config
+                    if ('asan' in config or config == 'msan' or
+                            config == 'tsan' or config == 'ubsan' or
+                            config == 'helgrind' or config == 'memcheck'):
+                        # Scale overall test timeout if running under various sanitizers.
+                        # scaling value is based on historical data analysis
+                        timeout_scaling *= 3
+                    elif polling_strategy == 'poll-cv':
+                        # scale test timeout if running with poll-cv
+                        # sanitizer and poll-cv scaling is not cumulative to ensure
+                        # reasonable timeout values.
+                        # TODO(jtattermusch): based on historical data and 5min default
+                        # test timeout poll-cv scaling is currently not useful.
+                        # Leaving here so it can be reintroduced if the default test timeout
+                        # is decreased in the future.
+                        timeout_scaling *= 1
+
+                if self.config.build_config in target['exclude_configs']:
+                    continue
+                if self.args.iomgr_platform in target.get('exclude_iomgrs', []):
+                    continue
+                if self.platform == 'windows':
+                    binary = 'cmake/build/%s/%s.exe' % (
+                        _MSBUILD_CONFIG[self.config.build_config],
+                        target['name'])
+                else:
+                    if self._use_cmake:
+                        binary = 'cmake/build/%s' % target['name']
+                    else:
+                        binary = 'bins/%s/%s' % (self.config.build_config,
+                                                 target['name'])
+                cpu_cost = target['cpu_cost']
+                if cpu_cost == 'capacity':
+                    cpu_cost = multiprocessing.cpu_count()
+                if os.path.isfile(binary):
+                    list_test_command = None
+                    filter_test_command = None
+
+                    # these are the flag defined by gtest and benchmark framework to list
+                    # and filter test runs. We use them to split each individual test
+                    # into its own JobSpec, and thus into its own process.
+                    if 'benchmark' in target and target['benchmark']:
+                        with open(os.devnull, 'w') as fnull:
+                            tests = subprocess.check_output(
+                                [binary, '--benchmark_list_tests'],
+                                stderr=fnull)
+                        for line in tests.split('\n'):
+                            test = line.strip()
+                            if not test: continue
+                            cmdline = [binary, '--benchmark_filter=%s$' % test
+                                      ] + target['args']
+                            out.append(
+                                self.config.job_spec(
+                                    cmdline,
+                                    shortname='%s %s' % (' '.join(cmdline),
+                                                         shortname_ext),
+                                    cpu_cost=cpu_cost,
+                                    timeout_seconds=_DEFAULT_TIMEOUT_SECONDS *
+                                    timeout_scaling,
+                                    environ=env))
+                    elif 'gtest' in target and target['gtest']:
+                        # here we parse the output of --gtest_list_tests to build up a complete
+                        # list of the tests contained in a binary for each test, we then
+                        # add a job to run, filtering for just that test.
+                        with open(os.devnull, 'w') as fnull:
+                            tests = subprocess.check_output(
+                                [binary, '--gtest_list_tests'], stderr=fnull)
+                        base = None
+                        for line in tests.split('\n'):
+                            i = line.find('#')
+                            if i >= 0: line = line[:i]
+                            if not line: continue
+                            if line[0] != ' ':
+                                base = line.strip()
+                            else:
+                                assert base is not None
+                                assert line[1] == ' '
+                                test = base + line.strip()
+                                cmdline = [binary, '--gtest_filter=%s' % test
+                                          ] + target['args']
+                                out.append(
+                                    self.config.job_spec(
+                                        cmdline,
+                                        shortname='%s %s' % (' '.join(cmdline),
+                                                             shortname_ext),
+                                        cpu_cost=cpu_cost,
+                                        timeout_seconds=target.get(
+                                            'timeout_seconds',
+                                            _DEFAULT_TIMEOUT_SECONDS) *
+                                        timeout_scaling,
+                                        environ=env))
+                    else:
+                        cmdline = [binary] + target['args']
+                        shortname = target.get('shortname', ' '.join(
+                            pipes.quote(arg) for arg in cmdline))
+                        shortname += shortname_ext
+                        out.append(
+                            self.config.job_spec(
+                                cmdline,
+                                shortname=shortname,
+                                cpu_cost=cpu_cost,
+                                flaky=target.get('flaky', False),
+                                timeout_seconds=target.get(
+                                    'timeout_seconds', _DEFAULT_TIMEOUT_SECONDS)
+                                * timeout_scaling,
+                                environ=env))
+                elif self.args.regex == '.*' or self.platform == 'windows':
+                    print('\nWARNING: binary not found, skipping', binary)
+        return sorted(out)
+
+    def make_targets(self):
+        if self.platform == 'windows':
+            # don't build tools on windows just yet
+            return ['buildtests_%s' % self.make_target]
+        return [
+            'buildtests_%s' % self.make_target, 'tools_%s' % self.make_target,
+            'check_epollexclusive'
+        ]
 
-  def build_steps(self):
-    return []
+    def make_options(self):
+        return self._make_options
 
-  def post_tests_steps(self):
-    if self.platform == 'windows':
-      return []
-    else:
-      return [['tools/run_tests/helper_scripts/post_tests_c.sh']]
+    def pre_build_steps(self):
+        if self.platform == 'windows':
+            return [[
+                'tools\\run_tests\\helper_scripts\\pre_build_cmake.bat',
+                self._cmake_generator_option, self._cmake_arch_option
+            ]]
+        elif self._use_cmake:
+            return [['tools/run_tests/helper_scripts/pre_build_cmake.sh']]
+        else:
+            return []
 
-  def makefile_name(self):
-    if self._use_cmake:
-      return 'cmake/build/Makefile'
-    else:
-      return 'Makefile'
-
-  def _clang_make_options(self, version_suffix=''):
-    return ['CC=clang%s' % version_suffix,
-            'CXX=clang++%s' % version_suffix,
-            'LD=clang%s' % version_suffix,
-            'LDXX=clang++%s' % version_suffix]
-
-  def _gcc_make_options(self, version_suffix):
-    return ['CC=gcc%s' % version_suffix,
-            'CXX=g++%s' % version_suffix,
-            'LD=gcc%s' % version_suffix,
-            'LDXX=g++%s' % version_suffix]
-
-  def _compiler_options(self, use_docker, compiler):
-    """Returns docker distro and make options to use for given compiler."""
-    if not use_docker and not _is_use_docker_child():
-      _check_compiler(compiler, ['default'])
-
-    if compiler == 'gcc4.9' or compiler == 'default':
-      return ('jessie', [])
-    elif compiler == 'gcc4.8':
-      return ('jessie', self._gcc_make_options(version_suffix='-4.8'))
-    elif compiler == 'gcc5.3':
-      return ('ubuntu1604', [])
-    elif compiler == 'gcc_musl':
-      return ('alpine', [])
-    elif compiler == 'clang3.4':
-      # on ubuntu1404, clang-3.4 alias doesn't exist, just use 'clang'
-      return ('ubuntu1404', self._clang_make_options())
-    elif compiler == 'clang3.5':
-      return ('jessie', self._clang_make_options(version_suffix='-3.5'))
-    elif compiler == 'clang3.6':
-      return ('ubuntu1604', self._clang_make_options(version_suffix='-3.6'))
-    elif compiler == 'clang3.7':
-      return ('ubuntu1604', self._clang_make_options(version_suffix='-3.7'))
-    else:
-      raise Exception('Compiler %s not supported.' % compiler)
+    def build_steps(self):
+        return []
 
-  def dockerfile_dir(self):
-    return 'tools/dockerfile/test/cxx_%s_%s' % (self._docker_distro,
-                                                _docker_arch_suffix(self.args.arch))
+    def post_tests_steps(self):
+        if self.platform == 'windows':
+            return []
+        else:
+            return [['tools/run_tests/helper_scripts/post_tests_c.sh']]
+
+    def makefile_name(self):
+        if self._use_cmake:
+            return 'cmake/build/Makefile'
+        else:
+            return 'Makefile'
+
+    def _clang_make_options(self, version_suffix=''):
+        return [
+            'CC=clang%s' % version_suffix, 'CXX=clang++%s' % version_suffix,
+            'LD=clang%s' % version_suffix, 'LDXX=clang++%s' % version_suffix
+        ]
+
+    def _gcc_make_options(self, version_suffix):
+        return [
+            'CC=gcc%s' % version_suffix, 'CXX=g++%s' % version_suffix,
+            'LD=gcc%s' % version_suffix, 'LDXX=g++%s' % version_suffix
+        ]
+
+    def _compiler_options(self, use_docker, compiler):
+        """Returns docker distro and make options to use for given compiler."""
+        if not use_docker and not _is_use_docker_child():
+            _check_compiler(compiler, ['default'])
+
+        if compiler == 'gcc4.9' or compiler == 'default':
+            return ('jessie', [])
+        elif compiler == 'gcc4.8':
+            return ('jessie', self._gcc_make_options(version_suffix='-4.8'))
+        elif compiler == 'gcc5.3':
+            return ('ubuntu1604', [])
+        elif compiler == 'gcc_musl':
+            return ('alpine', [])
+        elif compiler == 'clang3.4':
+            # on ubuntu1404, clang-3.4 alias doesn't exist, just use 'clang'
+            return ('ubuntu1404', self._clang_make_options())
+        elif compiler == 'clang3.5':
+            return ('jessie', self._clang_make_options(version_suffix='-3.5'))
+        elif compiler == 'clang3.6':
+            return ('ubuntu1604',
+                    self._clang_make_options(version_suffix='-3.6'))
+        elif compiler == 'clang3.7':
+            return ('ubuntu1604',
+                    self._clang_make_options(version_suffix='-3.7'))
+        else:
+            raise Exception('Compiler %s not supported.' % compiler)
 
-  def __str__(self):
-    return self.make_target
+    def dockerfile_dir(self):
+        return 'tools/dockerfile/test/cxx_%s_%s' % (
+            self._docker_distro, _docker_arch_suffix(self.args.arch))
+
+    def __str__(self):
+        return self.make_target
 
 
 # This tests Node on grpc/grpc-node and will become the standard for Node testing
 class RemoteNodeLanguage(object):
 
-  def __init__(self):
-    self.platform = platform_string()
-
-  def configure(self, config, args):
-    self.config = config
-    self.args = args
-    # Note: electron ABI only depends on major and minor version, so that's all
-    # we should specify in the compiler argument
-    _check_compiler(self.args.compiler, ['default', 'node0.12',
-                                         'node4', 'node5', 'node6',
-                                         'node7', 'node8',
-                                         'electron1.3', 'electron1.6'])
-    if self.args.compiler == 'default':
-      self.runtime = 'node'
-      self.node_version = '8'
-    else:
-      if self.args.compiler.startswith('electron'):
-        self.runtime = 'electron'
-        self.node_version = self.args.compiler[8:]
-      else:
-        self.runtime = 'node'
-        # Take off the word "node"
-        self.node_version = self.args.compiler[4:]
-
-  # TODO: update with Windows/electron scripts when available for grpc/grpc-node
-  def test_specs(self):
-    if self.platform == 'windows':
-      return [self.config.job_spec(['tools\\run_tests\\helper_scripts\\run_node.bat'])]
-    else:
-      return [self.config.job_spec(['tools/run_tests/helper_scripts/run_grpc-node.sh'],
-                                   None,
-                                   environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+    def __init__(self):
+        self.platform = platform_string()
+
+    def configure(self, config, args):
+        self.config = config
+        self.args = args
+        # Note: electron ABI only depends on major and minor version, so that's all
+        # we should specify in the compiler argument
+        _check_compiler(self.args.compiler, [
+            'default', 'node0.12', 'node4', 'node5', 'node6', 'node7', 'node8',
+            'electron1.3', 'electron1.6'
+        ])
+        if self.args.compiler == 'default':
+            self.runtime = 'node'
+            self.node_version = '8'
+        else:
+            if self.args.compiler.startswith('electron'):
+                self.runtime = 'electron'
+                self.node_version = self.args.compiler[8:]
+            else:
+                self.runtime = 'node'
+                # Take off the word "node"
+                self.node_version = self.args.compiler[4:]
+
+    # TODO: update with Windows/electron scripts when available for grpc/grpc-node
+    def test_specs(self):
+        if self.platform == 'windows':
+            return [
+                self.config.job_spec(
+                    ['tools\\run_tests\\helper_scripts\\run_node.bat'])
+            ]
+        else:
+            return [
+                self.config.job_spec(
+                    ['tools/run_tests/helper_scripts/run_grpc-node.sh'],
+                    None,
+                    environ=_FORCE_ENVIRON_FOR_WRAPPERS)
+            ]
 
-  def pre_build_steps(self):
-    return []
+    def pre_build_steps(self):
+        return []
 
-  def make_targets(self):
-    return []
+    def make_targets(self):
+        return []
 
-  def make_options(self):
-    return []
+    def make_options(self):
+        return []
 
-  def build_steps(self):
-    return []
+    def build_steps(self):
+        return []
 
-  def post_tests_steps(self):
-    return []
+    def post_tests_steps(self):
+        return []
 
-  def makefile_name(self):
-    return 'Makefile'
+    def makefile_name(self):
+        return 'Makefile'
 
-  def dockerfile_dir(self):
-    return 'tools/dockerfile/test/node_jessie_%s' % _docker_arch_suffix(self.args.arch)
+    def dockerfile_dir(self):
+        return 'tools/dockerfile/test/node_jessie_%s' % _docker_arch_suffix(
+            self.args.arch)
 
-  def __str__(self):
-    return 'grpc-node'
+    def __str__(self):
+        return 'grpc-node'
 
 
 class PhpLanguage(object):
 
-  def configure(self, config, args):
-    self.config = config
-    self.args = args
-    _check_compiler(self.args.compiler, ['default'])
-    self._make_options = ['EMBED_OPENSSL=true', 'EMBED_ZLIB=true']
+    def configure(self, config, args):
+        self.config = config
+        self.args = args
+        _check_compiler(self.args.compiler, ['default'])
+        self._make_options = ['EMBED_OPENSSL=true', 'EMBED_ZLIB=true']
 
-  def test_specs(self):
-    return [self.config.job_spec(['src/php/bin/run_tests.sh'],
-                                  environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+    def test_specs(self):
+        return [
+            self.config.job_spec(
+                ['src/php/bin/run_tests.sh'],
+                environ=_FORCE_ENVIRON_FOR_WRAPPERS)
+        ]
 
-  def pre_build_steps(self):
-    return []
+    def pre_build_steps(self):
+        return []
 
-  def make_targets(self):
-    return ['static_c', 'shared_c']
+    def make_targets(self):
+        return ['static_c', 'shared_c']
 
-  def make_options(self):
-    return self._make_options;
+    def make_options(self):
+        return self._make_options
 
-  def build_steps(self):
-    return [['tools/run_tests/helper_scripts/build_php.sh']]
+    def build_steps(self):
+        return [['tools/run_tests/helper_scripts/build_php.sh']]
 
-  def post_tests_steps(self):
-    return [['tools/run_tests/helper_scripts/post_tests_php.sh']]
+    def post_tests_steps(self):
+        return [['tools/run_tests/helper_scripts/post_tests_php.sh']]
 
-  def makefile_name(self):
-    return 'Makefile'
+    def makefile_name(self):
+        return 'Makefile'
 
-  def dockerfile_dir(self):
-    return 'tools/dockerfile/test/php_jessie_%s' % _docker_arch_suffix(self.args.arch)
+    def dockerfile_dir(self):
+        return 'tools/dockerfile/test/php_jessie_%s' % _docker_arch_suffix(
+            self.args.arch)
 
-  def __str__(self):
-    return 'php'
+    def __str__(self):
+        return 'php'
 
 
 class Php7Language(object):
 
-  def configure(self, config, args):
-    self.config = config
-    self.args = args
-    _check_compiler(self.args.compiler, ['default'])
-    self._make_options = ['EMBED_OPENSSL=true', 'EMBED_ZLIB=true']
+    def configure(self, config, args):
+        self.config = config
+        self.args = args
+        _check_compiler(self.args.compiler, ['default'])
+        self._make_options = ['EMBED_OPENSSL=true', 'EMBED_ZLIB=true']
+
+    def test_specs(self):
+        return [
+            self.config.job_spec(
+                ['src/php/bin/run_tests.sh'],
+                environ=_FORCE_ENVIRON_FOR_WRAPPERS)
+        ]
 
-  def test_specs(self):
-    return [self.config.job_spec(['src/php/bin/run_tests.sh'],
-                                  environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+    def pre_build_steps(self):
+        return []
 
-  def pre_build_steps(self):
-    return []
+    def make_targets(self):
+        return ['static_c', 'shared_c']
 
-  def make_targets(self):
-    return ['static_c', 'shared_c']
+    def make_options(self):
+        return self._make_options
 
-  def make_options(self):
-    return self._make_options;
+    def build_steps(self):
+        return [['tools/run_tests/helper_scripts/build_php.sh']]
 
-  def build_steps(self):
-    return [['tools/run_tests/helper_scripts/build_php.sh']]
+    def post_tests_steps(self):
+        return [['tools/run_tests/helper_scripts/post_tests_php.sh']]
 
-  def post_tests_steps(self):
-    return [['tools/run_tests/helper_scripts/post_tests_php.sh']]
+    def makefile_name(self):
+        return 'Makefile'
 
-  def makefile_name(self):
-    return 'Makefile'
+    def dockerfile_dir(self):
+        return 'tools/dockerfile/test/php7_jessie_%s' % _docker_arch_suffix(
+            self.args.arch)
 
-  def dockerfile_dir(self):
-    return 'tools/dockerfile/test/php7_jessie_%s' % _docker_arch_suffix(self.args.arch)
+    def __str__(self):
+        return 'php7'
 
-  def __str__(self):
-    return 'php7'
 
+class PythonConfig(
+        collections.namedtuple('PythonConfig', ['name', 'build', 'run'])):
+    """Tuple of commands (named s.t. 'what it says on the tin' applies)"""
 
-class PythonConfig(collections.namedtuple('PythonConfig', [
-    'name', 'build', 'run'])):
-  """Tuple of commands (named s.t. 'what it says on the tin' applies)"""
 
 class PythonLanguage(object):
 
-  def configure(self, config, args):
-    self.config = config
-    self.args = args
-    self.pythons = self._get_pythons(self.args)
-
-  def test_specs(self):
-    # load list of known test suites
-    with open('src/python/grpcio_tests/tests/tests.json') as tests_json_file:
-      tests_json = json.load(tests_json_file)
-    environment = dict(_FORCE_ENVIRON_FOR_WRAPPERS)
-    return [self.config.job_spec(
-        config.run,
-        timeout_seconds=5*60,
-        environ=dict(list(environment.items()) +
-                     [('GRPC_PYTHON_TESTRUNNER_FILTER', str(suite_name))]),
-        shortname='%s.test.%s' % (config.name, suite_name),)
-        for suite_name in tests_json
-        for config in self.pythons]
-
-  def pre_build_steps(self):
-    return []
-
-  def make_targets(self):
-    return []
-
-  def make_options(self):
-    return []
-
-  def build_steps(self):
-    return [config.build for config in self.pythons]
-
-  def post_tests_steps(self):
-    if self.config.build_config != 'gcov':
-      return []
-    else:
-      return [['tools/run_tests/helper_scripts/post_tests_python.sh']]
+    def configure(self, config, args):
+        self.config = config
+        self.args = args
+        self.pythons = self._get_pythons(self.args)
+
+    def test_specs(self):
+        # load list of known test suites
+        with open(
+                'src/python/grpcio_tests/tests/tests.json') as tests_json_file:
+            tests_json = json.load(tests_json_file)
+        environment = dict(_FORCE_ENVIRON_FOR_WRAPPERS)
+        return [
+            self.config.job_spec(
+                config.run,
+                timeout_seconds=5 * 60,
+                environ=dict(
+                    list(environment.items()) + [(
+                        'GRPC_PYTHON_TESTRUNNER_FILTER', str(suite_name))]),
+                shortname='%s.test.%s' % (config.name, suite_name),)
+            for suite_name in tests_json for config in self.pythons
+        ]
+
+    def pre_build_steps(self):
+        return []
+
+    def make_targets(self):
+        return []
+
+    def make_options(self):
+        return []
+
+    def build_steps(self):
+        return [config.build for config in self.pythons]
+
+    def post_tests_steps(self):
+        if self.config.build_config != 'gcov':
+            return []
+        else:
+            return [['tools/run_tests/helper_scripts/post_tests_python.sh']]
 
-  def makefile_name(self):
-    return 'Makefile'
+    def makefile_name(self):
+        return 'Makefile'
 
-  def dockerfile_dir(self):
-    return 'tools/dockerfile/test/python_%s_%s' % (self.python_manager_name(), _docker_arch_suffix(self.args.arch))
+    def dockerfile_dir(self):
+        return 'tools/dockerfile/test/python_%s_%s' % (
+            self.python_manager_name(), _docker_arch_suffix(self.args.arch))
 
-  def python_manager_name(self):
-    if self.args.compiler in ['python3.5', 'python3.6']:
-      return 'pyenv'
-    elif self.args.compiler == 'python_alpine':
-      return 'alpine'
-    else:
-      return 'jessie'
+    def python_manager_name(self):
+        if self.args.compiler in ['python3.5', 'python3.6']:
+            return 'pyenv'
+        elif self.args.compiler == 'python_alpine':
+            return 'alpine'
+        else:
+            return 'jessie'
 
-  def _get_pythons(self, args):
-    if args.arch == 'x86':
-      bits = '32'
-    else:
-      bits = '64'
-
-    if os.name == 'nt':
-      shell = ['bash']
-      builder = [os.path.abspath('tools/run_tests/helper_scripts/build_python_msys2.sh')]
-      builder_prefix_arguments = ['MINGW{}'.format(bits)]
-      venv_relative_python = ['Scripts/python.exe']
-      toolchain = ['mingw32']
-    else:
-      shell = []
-      builder = [os.path.abspath('tools/run_tests/helper_scripts/build_python.sh')]
-      builder_prefix_arguments = []
-      venv_relative_python = ['bin/python']
-      toolchain = ['unix']
-
-    runner = [os.path.abspath('tools/run_tests/helper_scripts/run_python.sh')]
-    config_vars = _PythonConfigVars(shell, builder, builder_prefix_arguments,
-                              venv_relative_python, toolchain, runner)
-    python27_config = _python_config_generator(name='py27', major='2',
-                                               minor='7', bits=bits,
-                                               config_vars=config_vars)
-    python34_config = _python_config_generator(name='py34', major='3',
-                                               minor='4', bits=bits,
-                                               config_vars=config_vars)
-    python35_config = _python_config_generator(name='py35', major='3',
-                                               minor='5', bits=bits,
-                                               config_vars=config_vars)
-    python36_config = _python_config_generator(name='py36', major='3',
-                                               minor='6', bits=bits,
-                                               config_vars=config_vars)
-    pypy27_config = _pypy_config_generator(name='pypy', major='2',
-                                           config_vars=config_vars)
-    pypy32_config = _pypy_config_generator(name='pypy3', major='3',
-                                           config_vars=config_vars)
-
-    if args.compiler == 'default':
-      if os.name == 'nt':
-        return (python35_config,)
-      else:
-        return (python27_config, python34_config,)
-    elif args.compiler == 'python2.7':
-      return (python27_config,)
-    elif args.compiler == 'python3.4':
-      return (python34_config,)
-    elif args.compiler == 'python3.5':
-      return (python35_config,)
-    elif args.compiler == 'python3.6':
-      return (python36_config,)
-    elif args.compiler == 'pypy':
-      return (pypy27_config,)
-    elif args.compiler == 'pypy3':
-      return (pypy32_config,)
-    elif args.compiler == 'python_alpine':
-      return (python27_config,)
-    elif args.compiler == 'all_the_cpythons':
-      return (python27_config, python34_config, python35_config,
-              python36_config,)
-    else:
-      raise Exception('Compiler %s not supported.' % args.compiler)
+    def _get_pythons(self, args):
+        if args.arch == 'x86':
+            bits = '32'
+        else:
+            bits = '64'
+
+        if os.name == 'nt':
+            shell = ['bash']
+            builder = [
+                os.path.abspath(
+                    'tools/run_tests/helper_scripts/build_python_msys2.sh')
+            ]
+            builder_prefix_arguments = ['MINGW{}'.format(bits)]
+            venv_relative_python = ['Scripts/python.exe']
+            toolchain = ['mingw32']
+        else:
+            shell = []
+            builder = [
+                os.path.abspath(
+                    'tools/run_tests/helper_scripts/build_python.sh')
+            ]
+            builder_prefix_arguments = []
+            venv_relative_python = ['bin/python']
+            toolchain = ['unix']
+
+        runner = [
+            os.path.abspath('tools/run_tests/helper_scripts/run_python.sh')
+        ]
+        config_vars = _PythonConfigVars(shell, builder,
+                                        builder_prefix_arguments,
+                                        venv_relative_python, toolchain, runner)
+        python27_config = _python_config_generator(
+            name='py27',
+            major='2',
+            minor='7',
+            bits=bits,
+            config_vars=config_vars)
+        python34_config = _python_config_generator(
+            name='py34',
+            major='3',
+            minor='4',
+            bits=bits,
+            config_vars=config_vars)
+        python35_config = _python_config_generator(
+            name='py35',
+            major='3',
+            minor='5',
+            bits=bits,
+            config_vars=config_vars)
+        python36_config = _python_config_generator(
+            name='py36',
+            major='3',
+            minor='6',
+            bits=bits,
+            config_vars=config_vars)
+        pypy27_config = _pypy_config_generator(
+            name='pypy', major='2', config_vars=config_vars)
+        pypy32_config = _pypy_config_generator(
+            name='pypy3', major='3', config_vars=config_vars)
+
+        if args.compiler == 'default':
+            if os.name == 'nt':
+                return (python35_config,)
+            else:
+                return (python27_config, python34_config,)
+        elif args.compiler == 'python2.7':
+            return (python27_config,)
+        elif args.compiler == 'python3.4':
+            return (python34_config,)
+        elif args.compiler == 'python3.5':
+            return (python35_config,)
+        elif args.compiler == 'python3.6':
+            return (python36_config,)
+        elif args.compiler == 'pypy':
+            return (pypy27_config,)
+        elif args.compiler == 'pypy3':
+            return (pypy32_config,)
+        elif args.compiler == 'python_alpine':
+            return (python27_config,)
+        elif args.compiler == 'all_the_cpythons':
+            return (python27_config, python34_config, python35_config,
+                    python36_config,)
+        else:
+            raise Exception('Compiler %s not supported.' % args.compiler)
 
-  def __str__(self):
-    return 'python'
+    def __str__(self):
+        return 'python'
 
 
 class RubyLanguage(object):
 
-  def configure(self, config, args):
-    self.config = config
-    self.args = args
-    _check_compiler(self.args.compiler, ['default'])
+    def configure(self, config, args):
+        self.config = config
+        self.args = args
+        _check_compiler(self.args.compiler, ['default'])
 
-  def test_specs(self):
-    tests = [self.config.job_spec(['tools/run_tests/helper_scripts/run_ruby.sh'],
-                                  timeout_seconds=10*60,
-                                  environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
-    tests.append(self.config.job_spec(['tools/run_tests/helper_scripts/run_ruby_end2end_tests.sh'],
-                 timeout_seconds=10*60,
-                 environ=_FORCE_ENVIRON_FOR_WRAPPERS))
-    return tests
+    def test_specs(self):
+        tests = [
+            self.config.job_spec(
+                ['tools/run_tests/helper_scripts/run_ruby.sh'],
+                timeout_seconds=10 * 60,
+                environ=_FORCE_ENVIRON_FOR_WRAPPERS)
+        ]
+        tests.append(
+            self.config.job_spec(
+                ['tools/run_tests/helper_scripts/run_ruby_end2end_tests.sh'],
+                timeout_seconds=10 * 60,
+                environ=_FORCE_ENVIRON_FOR_WRAPPERS))
+        return tests
 
-  def pre_build_steps(self):
-    return [['tools/run_tests/helper_scripts/pre_build_ruby.sh']]
+    def pre_build_steps(self):
+        return [['tools/run_tests/helper_scripts/pre_build_ruby.sh']]
 
-  def make_targets(self):
-    return []
+    def make_targets(self):
+        return []
 
-  def make_options(self):
-    return []
+    def make_options(self):
+        return []
 
-  def build_steps(self):
-    return [['tools/run_tests/helper_scripts/build_ruby.sh']]
+    def build_steps(self):
+        return [['tools/run_tests/helper_scripts/build_ruby.sh']]
 
-  def post_tests_steps(self):
-    return [['tools/run_tests/helper_scripts/post_tests_ruby.sh']]
+    def post_tests_steps(self):
+        return [['tools/run_tests/helper_scripts/post_tests_ruby.sh']]
 
-  def makefile_name(self):
-    return 'Makefile'
+    def makefile_name(self):
+        return 'Makefile'
 
-  def dockerfile_dir(self):
-    return 'tools/dockerfile/test/ruby_jessie_%s' % _docker_arch_suffix(self.args.arch)
+    def dockerfile_dir(self):
+        return 'tools/dockerfile/test/ruby_jessie_%s' % _docker_arch_suffix(
+            self.args.arch)
 
-  def __str__(self):
-    return 'ruby'
+    def __str__(self):
+        return 'ruby'
 
 
 class CSharpLanguage(object):
 
-  def __init__(self):
-    self.platform = platform_string()
-
-  def configure(self, config, args):
-    self.config = config
-    self.args = args
-    if self.platform == 'windows':
-      _check_compiler(self.args.compiler, ['coreclr', 'default'])
-      _check_arch(self.args.arch, ['default'])
-      self._cmake_arch_option = 'x64'
-      self._make_options = []
-    else:
-      _check_compiler(self.args.compiler, ['default', 'coreclr'])
-      self._docker_distro = 'jessie'
-
-      if self.platform == 'mac':
-        # TODO(jtattermusch): EMBED_ZLIB=true currently breaks the mac build
-        self._make_options = ['EMBED_OPENSSL=true']
-        if self.args.compiler != 'coreclr':
-          # On Mac, official distribution of mono is 32bit.
-          self._make_options += ['ARCH_FLAGS=-m32', 'LDFLAGS=-m32']
-      else:
-        self._make_options = ['EMBED_OPENSSL=true', 'EMBED_ZLIB=true']
+    def __init__(self):
+        self.platform = platform_string()
 
-  def test_specs(self):
-    with open('src/csharp/tests.json') as f:
-      tests_by_assembly = json.load(f)
-
-    msbuild_config = _MSBUILD_CONFIG[self.config.build_config]
-    nunit_args = ['--labels=All', '--noresult', '--workers=1']
-    assembly_subdir = 'bin/%s' % msbuild_config
-    assembly_extension = '.exe'
-
-    if self.args.compiler == 'coreclr':
-      assembly_subdir += '/netcoreapp1.0'
-      runtime_cmd = ['dotnet', 'exec']
-      assembly_extension = '.dll'
-    else:
-      assembly_subdir += '/net45'
-      if self.platform == 'windows':
-        runtime_cmd = []
-      else:
-        runtime_cmd = ['mono']
-
-    specs = []
-    for assembly in six.iterkeys(tests_by_assembly):
-      assembly_file = 'src/csharp/%s/%s/%s%s' % (assembly,
-                                                 assembly_subdir,
-                                                 assembly,
-                                                 assembly_extension)
-      if self.config.build_config != 'gcov' or self.platform != 'windows':
-        # normally, run each test as a separate process
-        for test in tests_by_assembly[assembly]:
-          cmdline = runtime_cmd + [assembly_file, '--test=%s' % test] + nunit_args
-          specs.append(self.config.job_spec(cmdline,
-                                            shortname='csharp.%s' % test,
-                                            environ=_FORCE_ENVIRON_FOR_WRAPPERS))
-      else:
-        # For C# test coverage, run all tests from the same assembly at once
-        # using OpenCover.Console (only works on Windows).
-        cmdline = ['src\\csharp\\packages\\OpenCover.4.6.519\\tools\\OpenCover.Console.exe',
-                   '-target:%s' % assembly_file,
-                   '-targetdir:src\\csharp',
-                   '-targetargs:%s' % ' '.join(nunit_args),
-                   '-filter:+[Grpc.Core]*',
-                   '-register:user',
-                   '-output:src\\csharp\\coverage_csharp_%s.xml' % assembly]
-
-        # set really high cpu_cost to make sure instances of OpenCover.Console run exclusively
-        # to prevent problems with registering the profiler.
-        run_exclusive = 1000000
-        specs.append(self.config.job_spec(cmdline,
-                                          shortname='csharp.coverage.%s' % assembly,
-                                          cpu_cost=run_exclusive,
-                                          environ=_FORCE_ENVIRON_FOR_WRAPPERS))
-    return specs
-
-  def pre_build_steps(self):
-    if self.platform == 'windows':
-      return [['tools\\run_tests\\helper_scripts\\pre_build_csharp.bat', self._cmake_arch_option]]
-    else:
-      return [['tools/run_tests/helper_scripts/pre_build_csharp.sh']]
+    def configure(self, config, args):
+        self.config = config
+        self.args = args
+        if self.platform == 'windows':
+            _check_compiler(self.args.compiler, ['coreclr', 'default'])
+            _check_arch(self.args.arch, ['default'])
+            self._cmake_arch_option = 'x64'
+            self._make_options = []
+        else:
+            _check_compiler(self.args.compiler, ['default', 'coreclr'])
+            self._docker_distro = 'jessie'
+
+            if self.platform == 'mac':
+                # TODO(jtattermusch): EMBED_ZLIB=true currently breaks the mac build
+                self._make_options = ['EMBED_OPENSSL=true']
+                if self.args.compiler != 'coreclr':
+                    # On Mac, official distribution of mono is 32bit.
+                    self._make_options += ['ARCH_FLAGS=-m32', 'LDFLAGS=-m32']
+            else:
+                self._make_options = ['EMBED_OPENSSL=true', 'EMBED_ZLIB=true']
+
+    def test_specs(self):
+        with open('src/csharp/tests.json') as f:
+            tests_by_assembly = json.load(f)
+
+        msbuild_config = _MSBUILD_CONFIG[self.config.build_config]
+        nunit_args = ['--labels=All', '--noresult', '--workers=1']
+        assembly_subdir = 'bin/%s' % msbuild_config
+        assembly_extension = '.exe'
+
+        if self.args.compiler == 'coreclr':
+            assembly_subdir += '/netcoreapp1.0'
+            runtime_cmd = ['dotnet', 'exec']
+            assembly_extension = '.dll'
+        else:
+            assembly_subdir += '/net45'
+            if self.platform == 'windows':
+                runtime_cmd = []
+            else:
+                runtime_cmd = ['mono']
+
+        specs = []
+        for assembly in six.iterkeys(tests_by_assembly):
+            assembly_file = 'src/csharp/%s/%s/%s%s' % (
+                assembly, assembly_subdir, assembly, assembly_extension)
+            if self.config.build_config != 'gcov' or self.platform != 'windows':
+                # normally, run each test as a separate process
+                for test in tests_by_assembly[assembly]:
+                    cmdline = runtime_cmd + [assembly_file, '--test=%s' % test
+                                            ] + nunit_args
+                    specs.append(
+                        self.config.job_spec(
+                            cmdline,
+                            shortname='csharp.%s' % test,
+                            environ=_FORCE_ENVIRON_FOR_WRAPPERS))
+            else:
+                # For C# test coverage, run all tests from the same assembly at once
+                # using OpenCover.Console (only works on Windows).
+                cmdline = [
+                    'src\\csharp\\packages\\OpenCover.4.6.519\\tools\\OpenCover.Console.exe',
+                    '-target:%s' % assembly_file, '-targetdir:src\\csharp',
+                    '-targetargs:%s' % ' '.join(nunit_args),
+                    '-filter:+[Grpc.Core]*', '-register:user',
+                    '-output:src\\csharp\\coverage_csharp_%s.xml' % assembly
+                ]
+
+                # set really high cpu_cost to make sure instances of OpenCover.Console run exclusively
+                # to prevent problems with registering the profiler.
+                run_exclusive = 1000000
+                specs.append(
+                    self.config.job_spec(
+                        cmdline,
+                        shortname='csharp.coverage.%s' % assembly,
+                        cpu_cost=run_exclusive,
+                        environ=_FORCE_ENVIRON_FOR_WRAPPERS))
+        return specs
+
+    def pre_build_steps(self):
+        if self.platform == 'windows':
+            return [[
+                'tools\\run_tests\\helper_scripts\\pre_build_csharp.bat',
+                self._cmake_arch_option
+            ]]
+        else:
+            return [['tools/run_tests/helper_scripts/pre_build_csharp.sh']]
 
-  def make_targets(self):
-    return ['grpc_csharp_ext']
+    def make_targets(self):
+        return ['grpc_csharp_ext']
 
-  def make_options(self):
-    return self._make_options;
+    def make_options(self):
+        return self._make_options
 
-  def build_steps(self):
-    if self.platform == 'windows':
-      return [['tools\\run_tests\\helper_scripts\\build_csharp.bat']]
-    else:
-      return [['tools/run_tests/helper_scripts/build_csharp.sh']]
+    def build_steps(self):
+        if self.platform == 'windows':
+            return [['tools\\run_tests\\helper_scripts\\build_csharp.bat']]
+        else:
+            return [['tools/run_tests/helper_scripts/build_csharp.sh']]
 
-  def post_tests_steps(self):
-    if self.platform == 'windows':
-      return [['tools\\run_tests\\helper_scripts\\post_tests_csharp.bat']]
-    else:
-      return [['tools/run_tests/helper_scripts/post_tests_csharp.sh']]
+    def post_tests_steps(self):
+        if self.platform == 'windows':
+            return [['tools\\run_tests\\helper_scripts\\post_tests_csharp.bat']]
+        else:
+            return [['tools/run_tests/helper_scripts/post_tests_csharp.sh']]
 
-  def makefile_name(self):
-    if self.platform == 'windows':
-      return 'cmake/build/%s/Makefile' % self._cmake_arch_option
-    else:
-      return 'Makefile'
+    def makefile_name(self):
+        if self.platform == 'windows':
+            return 'cmake/build/%s/Makefile' % self._cmake_arch_option
+        else:
+            return 'Makefile'
 
-  def dockerfile_dir(self):
-    return 'tools/dockerfile/test/csharp_%s_%s' % (self._docker_distro,
-                                                   _docker_arch_suffix(self.args.arch))
+    def dockerfile_dir(self):
+        return 'tools/dockerfile/test/csharp_%s_%s' % (
+            self._docker_distro, _docker_arch_suffix(self.args.arch))
 
-  def __str__(self):
-    return 'csharp'
+    def __str__(self):
+        return 'csharp'
 
 
 class ObjCLanguage(object):
 
-  def configure(self, config, args):
-    self.config = config
-    self.args = args
-    _check_compiler(self.args.compiler, ['default'])
-
-  def test_specs(self):
-    return [
-        self.config.job_spec(['src/objective-c/tests/run_tests.sh'],
-                              timeout_seconds=60*60,
-                              shortname='objc-tests',
-                              cpu_cost=1e6,
-                              environ=_FORCE_ENVIRON_FOR_WRAPPERS),
-        self.config.job_spec(['src/objective-c/tests/run_plugin_tests.sh'],
-                              timeout_seconds=60*60,
-                              shortname='objc-plugin-tests',
-                              cpu_cost=1e6,
-                              environ=_FORCE_ENVIRON_FOR_WRAPPERS),
-        self.config.job_spec(['src/objective-c/tests/build_one_example.sh'],
-                              timeout_seconds=10*60,
-                              shortname='objc-build-example-helloworld',
-                              cpu_cost=1e6,
-                              environ={'SCHEME': 'HelloWorld',
-                                       'EXAMPLE_PATH': 'examples/objective-c/helloworld'}),
-        self.config.job_spec(['src/objective-c/tests/build_one_example.sh'],
-                              timeout_seconds=10*60,
-                              shortname='objc-build-example-routeguide',
-                              cpu_cost=1e6,
-                              environ={'SCHEME': 'RouteGuideClient',
-                                       'EXAMPLE_PATH': 'examples/objective-c/route_guide'}),
-        self.config.job_spec(['src/objective-c/tests/build_one_example.sh'],
-                              timeout_seconds=10*60,
-                              shortname='objc-build-example-authsample',
-                              cpu_cost=1e6,
-                              environ={'SCHEME': 'AuthSample',
-                                       'EXAMPLE_PATH': 'examples/objective-c/auth_sample'}),
-        self.config.job_spec(['src/objective-c/tests/build_one_example.sh'],
-                              timeout_seconds=10*60,
-                              shortname='objc-build-example-sample',
-                              cpu_cost=1e6,
-                              environ={'SCHEME': 'Sample',
-                                       'EXAMPLE_PATH': 'src/objective-c/examples/Sample'}),
-        self.config.job_spec(['src/objective-c/tests/build_one_example.sh'],
-                              timeout_seconds=10*60,
-                              shortname='objc-build-example-sample-frameworks',
-                              cpu_cost=1e6,
-                              environ={'SCHEME': 'Sample',
-                                       'EXAMPLE_PATH': 'src/objective-c/examples/Sample',
-                                       'FRAMEWORKS': 'YES'}),
-        self.config.job_spec(['src/objective-c/tests/build_one_example.sh'],
-                              timeout_seconds=10*60,
-                              shortname='objc-build-example-switftsample',
-                              cpu_cost=1e6,
-                              environ={'SCHEME': 'SwiftSample',
-                                       'EXAMPLE_PATH': 'src/objective-c/examples/SwiftSample'}),
-    ]
-
-  def pre_build_steps(self):
-    return []
-
-  def make_targets(self):
-    return ['interop_server']
-
-  def make_options(self):
-    return []
-
-  def build_steps(self):
-    return [['src/objective-c/tests/build_tests.sh']]
-
-  def post_tests_steps(self):
-    return []
-
-  def makefile_name(self):
-    return 'Makefile'
-
-  def dockerfile_dir(self):
-    return None
-
-  def __str__(self):
-    return 'objc'
+    def configure(self, config, args):
+        self.config = config
+        self.args = args
+        _check_compiler(self.args.compiler, ['default'])
+
+    def test_specs(self):
+        return [
+            self.config.job_spec(
+                ['src/objective-c/tests/run_tests.sh'],
+                timeout_seconds=60 * 60,
+                shortname='objc-tests',
+                cpu_cost=1e6,
+                environ=_FORCE_ENVIRON_FOR_WRAPPERS),
+            self.config.job_spec(
+                ['src/objective-c/tests/run_plugin_tests.sh'],
+                timeout_seconds=60 * 60,
+                shortname='objc-plugin-tests',
+                cpu_cost=1e6,
+                environ=_FORCE_ENVIRON_FOR_WRAPPERS),
+            self.config.job_spec(
+                ['src/objective-c/tests/build_one_example.sh'],
+                timeout_seconds=10 * 60,
+                shortname='objc-build-example-helloworld',
+                cpu_cost=1e6,
+                environ={
+                    'SCHEME': 'HelloWorld',
+                    'EXAMPLE_PATH': 'examples/objective-c/helloworld'
+                }),
+            self.config.job_spec(
+                ['src/objective-c/tests/build_one_example.sh'],
+                timeout_seconds=10 * 60,
+                shortname='objc-build-example-routeguide',
+                cpu_cost=1e6,
+                environ={
+                    'SCHEME': 'RouteGuideClient',
+                    'EXAMPLE_PATH': 'examples/objective-c/route_guide'
+                }),
+            self.config.job_spec(
+                ['src/objective-c/tests/build_one_example.sh'],
+                timeout_seconds=10 * 60,
+                shortname='objc-build-example-authsample',
+                cpu_cost=1e6,
+                environ={
+                    'SCHEME': 'AuthSample',
+                    'EXAMPLE_PATH': 'examples/objective-c/auth_sample'
+                }),
+            self.config.job_spec(
+                ['src/objective-c/tests/build_one_example.sh'],
+                timeout_seconds=10 * 60,
+                shortname='objc-build-example-sample',
+                cpu_cost=1e6,
+                environ={
+                    'SCHEME': 'Sample',
+                    'EXAMPLE_PATH': 'src/objective-c/examples/Sample'
+                }),
+            self.config.job_spec(
+                ['src/objective-c/tests/build_one_example.sh'],
+                timeout_seconds=10 * 60,
+                shortname='objc-build-example-sample-frameworks',
+                cpu_cost=1e6,
+                environ={
+                    'SCHEME': 'Sample',
+                    'EXAMPLE_PATH': 'src/objective-c/examples/Sample',
+                    'FRAMEWORKS': 'YES'
+                }),
+            self.config.job_spec(
+                ['src/objective-c/tests/build_one_example.sh'],
+                timeout_seconds=10 * 60,
+                shortname='objc-build-example-switftsample',
+                cpu_cost=1e6,
+                environ={
+                    'SCHEME': 'SwiftSample',
+                    'EXAMPLE_PATH': 'src/objective-c/examples/SwiftSample'
+                }),
+        ]
+
+    def pre_build_steps(self):
+        return []
+
+    def make_targets(self):
+        return ['interop_server']
+
+    def make_options(self):
+        return []
+
+    def build_steps(self):
+        return [['src/objective-c/tests/build_tests.sh']]
+
+    def post_tests_steps(self):
+        return []
+
+    def makefile_name(self):
+        return 'Makefile'
+
+    def dockerfile_dir(self):
+        return None
+
+    def __str__(self):
+        return 'objc'
 
 
 class Sanity(object):
 
-  def configure(self, config, args):
-    self.config = config
-    self.args = args
-    _check_compiler(self.args.compiler, ['default'])
+    def configure(self, config, args):
+        self.config = config
+        self.args = args
+        _check_compiler(self.args.compiler, ['default'])
 
-  def test_specs(self):
-    import yaml
-    with open('tools/run_tests/sanity/sanity_tests.yaml', 'r') as f:
-      environ={'TEST': 'true'}
-      if _is_use_docker_child():
-        environ['CLANG_FORMAT_SKIP_DOCKER'] = 'true'
-      return [self.config.job_spec(cmd['script'].split(),
-                                   timeout_seconds=30*60,
-                                   environ=environ,
-                                   cpu_cost=cmd.get('cpu_cost', 1))
-              for cmd in yaml.load(f)]
+    def test_specs(self):
+        import yaml
+        with open('tools/run_tests/sanity/sanity_tests.yaml', 'r') as f:
+            environ = {'TEST': 'true'}
+            if _is_use_docker_child():
+                environ['CLANG_FORMAT_SKIP_DOCKER'] = 'true'
+            return [
+                self.config.job_spec(
+                    cmd['script'].split(),
+                    timeout_seconds=30 * 60,
+                    environ=environ,
+                    cpu_cost=cmd.get('cpu_cost', 1)) for cmd in yaml.load(f)
+            ]
 
-  def pre_build_steps(self):
-    return []
+    def pre_build_steps(self):
+        return []
 
-  def make_targets(self):
-    return ['run_dep_checks']
+    def make_targets(self):
+        return ['run_dep_checks']
 
-  def make_options(self):
-    return []
+    def make_options(self):
+        return []
 
-  def build_steps(self):
-    return []
+    def build_steps(self):
+        return []
 
-  def post_tests_steps(self):
-    return []
+    def post_tests_steps(self):
+        return []
 
-  def makefile_name(self):
-    return 'Makefile'
+    def makefile_name(self):
+        return 'Makefile'
 
-  def dockerfile_dir(self):
-    return 'tools/dockerfile/test/sanity'
+    def dockerfile_dir(self):
+        return 'tools/dockerfile/test/sanity'
+
+    def __str__(self):
+        return 'sanity'
 
-  def __str__(self):
-    return 'sanity'
 
 # different configurations we can run under
 with open('tools/run_tests/generated/configs.json') as f:
-  _CONFIGS = dict((cfg['config'], Config(**cfg)) for cfg in ast.literal_eval(f.read()))
-
+    _CONFIGS = dict((cfg['config'], Config(**cfg))
+                    for cfg in ast.literal_eval(f.read()))
 
 _LANGUAGES = {
     'c++': CLanguage('cxx', 'c++'),
@@ -1033,60 +1157,61 @@ _LANGUAGES = {
     'python': PythonLanguage(),
     'ruby': RubyLanguage(),
     'csharp': CSharpLanguage(),
-    'objc' : ObjCLanguage(),
+    'objc': ObjCLanguage(),
     'sanity': Sanity()
-    }
-
+}
 
 _MSBUILD_CONFIG = {
     'dbg': 'Debug',
     'opt': 'Release',
     'gcov': 'Debug',
-    }
+}
 
 
 def _windows_arch_option(arch):
-  """Returns msbuild cmdline option for selected architecture."""
-  if arch == 'default' or arch == 'x86':
-    return '/p:Platform=Win32'
-  elif arch == 'x64':
-    return '/p:Platform=x64'
-  else:
-    print('Architecture %s not supported.' % arch)
-    sys.exit(1)
+    """Returns msbuild cmdline option for selected architecture."""
+    if arch == 'default' or arch == 'x86':
+        return '/p:Platform=Win32'
+    elif arch == 'x64':
+        return '/p:Platform=x64'
+    else:
+        print('Architecture %s not supported.' % arch)
+        sys.exit(1)
 
 
 def _check_arch_option(arch):
-  """Checks that architecture option is valid."""
-  if platform_string() == 'windows':
-    _windows_arch_option(arch)
-  elif platform_string() == 'linux':
-    # On linux, we need to be running under docker with the right architecture.
-    runtime_arch = platform.architecture()[0]
-    if arch == 'default':
-      return
-    elif runtime_arch == '64bit' and arch == 'x64':
-      return
-    elif runtime_arch == '32bit' and arch == 'x86':
-      return
+    """Checks that architecture option is valid."""
+    if platform_string() == 'windows':
+        _windows_arch_option(arch)
+    elif platform_string() == 'linux':
+        # On linux, we need to be running under docker with the right architecture.
+        runtime_arch = platform.architecture()[0]
+        if arch == 'default':
+            return
+        elif runtime_arch == '64bit' and arch == 'x64':
+            return
+        elif runtime_arch == '32bit' and arch == 'x86':
+            return
+        else:
+            print('Architecture %s does not match current runtime architecture.'
+                  % arch)
+            sys.exit(1)
     else:
-      print('Architecture %s does not match current runtime architecture.' % arch)
-      sys.exit(1)
-  else:
-    if args.arch != 'default':
-      print('Architecture %s not supported on current platform.' % args.arch)
-      sys.exit(1)
+        if args.arch != 'default':
+            print('Architecture %s not supported on current platform.' %
+                  args.arch)
+            sys.exit(1)
 
 
 def _docker_arch_suffix(arch):
-  """Returns suffix to dockerfile dir to use."""
-  if arch == 'default' or arch == 'x64':
-    return 'x64'
-  elif arch == 'x86':
-    return 'x86'
-  else:
-    print('Architecture %s not supported with current settings.' % arch)
-    sys.exit(1)
+    """Returns suffix to dockerfile dir to use."""
+    if arch == 'default' or arch == 'x64':
+        return 'x64'
+    elif arch == 'x86':
+        return 'x86'
+    else:
+        print('Architecture %s not supported with current settings.' % arch)
+        sys.exit(1)
 
 
 def runs_per_test_type(arg_str):
@@ -1111,478 +1236,581 @@ def runs_per_test_type(arg_str):
 
 
 def percent_type(arg_str):
-  pct = float(arg_str)
-  if pct > 100 or pct < 0:
-    raise argparse.ArgumentTypeError(
-        "'%f' is not a valid percentage in the [0, 100] range" % pct)
-  return pct
+    pct = float(arg_str)
+    if pct > 100 or pct < 0:
+        raise argparse.ArgumentTypeError(
+            "'%f' is not a valid percentage in the [0, 100] range" % pct)
+    return pct
+
 
 # This is math.isclose in python >= 3.5
 def isclose(a, b, rel_tol=1e-09, abs_tol=0.0):
-      return abs(a-b) <= max(rel_tol * max(abs(a), abs(b)), abs_tol)
+    return abs(a - b) <= max(rel_tol * max(abs(a), abs(b)), abs_tol)
 
 
 # parse command line
 argp = argparse.ArgumentParser(description='Run grpc tests.')
-argp.add_argument('-c', '--config',
-                  choices=sorted(_CONFIGS.keys()),
-                  default='opt')
-argp.add_argument('-n', '--runs_per_test', default=1, type=runs_per_test_type,
-        help='A positive integer or "inf". If "inf", all tests will run in an '
-             'infinite loop. Especially useful in combination with "-f"')
+argp.add_argument(
+    '-c', '--config', choices=sorted(_CONFIGS.keys()), default='opt')
+argp.add_argument(
+    '-n',
+    '--runs_per_test',
+    default=1,
+    type=runs_per_test_type,
+    help='A positive integer or "inf". If "inf", all tests will run in an '
+    'infinite loop. Especially useful in combination with "-f"')
 argp.add_argument('-r', '--regex', default='.*', type=str)
 argp.add_argument('--regex_exclude', default='', type=str)
 argp.add_argument('-j', '--jobs', default=multiprocessing.cpu_count(), type=int)
 argp.add_argument('-s', '--slowdown', default=1.0, type=float)
-argp.add_argument('-p', '--sample_percent', default=100.0, type=percent_type,
-                  help='Run a random sample with that percentage of tests')
-argp.add_argument('-f', '--forever',
-                  default=False,
-                  action='store_const',
-                  const=True)
-argp.add_argument('-t', '--travis',
-                  default=False,
-                  action='store_const',
-                  const=True)
-argp.add_argument('--newline_on_success',
-                  default=False,
-                  action='store_const',
-                  const=True)
-argp.add_argument('-l', '--language',
-                  choices=['all'] + sorted(_LANGUAGES.keys()),
-                  nargs='+',
-                  default=['all'])
-argp.add_argument('-S', '--stop_on_failure',
-                  default=False,
-                  action='store_const',
-                  const=True)
-argp.add_argument('--use_docker',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help='Run all the tests under docker. That provides ' +
-                  'additional isolation and prevents the need to install ' +
-                  'language specific prerequisites. Only available on Linux.')
-argp.add_argument('--allow_flakes',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help='Allow flaky tests to show as passing (re-runs failed tests up to five times)')
-argp.add_argument('--arch',
-                  choices=['default', 'x86', 'x64'],
-                  default='default',
-                  help='Selects architecture to target. For some platforms "default" is the only supported choice.')
-argp.add_argument('--compiler',
-                  choices=['default',
-                           'gcc4.4', 'gcc4.6', 'gcc4.8', 'gcc4.9', 'gcc5.3', 'gcc_musl',
-                           'clang3.4', 'clang3.5', 'clang3.6', 'clang3.7',
-                           'python2.7', 'python3.4', 'python3.5', 'python3.6', 'pypy', 'pypy3', 'python_alpine', 'all_the_cpythons',
-                           'electron1.3', 'electron1.6',
-                           'coreclr',
-                           'cmake', 'cmake_vs2015', 'cmake_vs2017'],
-                  default='default',
-                  help='Selects compiler to use. Allowed values depend on the platform and language.')
-argp.add_argument('--iomgr_platform',
-                  choices=['native', 'uv'],
-                  default='native',
-                  help='Selects iomgr platform to build on')
-argp.add_argument('--build_only',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help='Perform all the build steps but don\'t run any tests.')
-argp.add_argument('--measure_cpu_costs', default=False, action='store_const', const=True,
-                  help='Measure the cpu costs of tests')
-argp.add_argument('--update_submodules', default=[], nargs='*',
-                  help='Update some submodules before building. If any are updated, also run generate_projects. ' +
-                       'Submodules are specified as SUBMODULE_NAME:BRANCH; if BRANCH is omitted, master is assumed.')
+argp.add_argument(
+    '-p',
+    '--sample_percent',
+    default=100.0,
+    type=percent_type,
+    help='Run a random sample with that percentage of tests')
+argp.add_argument(
+    '-f', '--forever', default=False, action='store_const', const=True)
+argp.add_argument(
+    '-t', '--travis', default=False, action='store_const', const=True)
+argp.add_argument(
+    '--newline_on_success', default=False, action='store_const', const=True)
+argp.add_argument(
+    '-l',
+    '--language',
+    choices=['all'] + sorted(_LANGUAGES.keys()),
+    nargs='+',
+    default=['all'])
+argp.add_argument(
+    '-S', '--stop_on_failure', default=False, action='store_const', const=True)
+argp.add_argument(
+    '--use_docker',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Run all the tests under docker. That provides ' +
+    'additional isolation and prevents the need to install ' +
+    'language specific prerequisites. Only available on Linux.')
+argp.add_argument(
+    '--allow_flakes',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Allow flaky tests to show as passing (re-runs failed tests up to five times)'
+)
+argp.add_argument(
+    '--arch',
+    choices=['default', 'x86', 'x64'],
+    default='default',
+    help='Selects architecture to target. For some platforms "default" is the only supported choice.'
+)
+argp.add_argument(
+    '--compiler',
+    choices=[
+        'default', 'gcc4.4', 'gcc4.6', 'gcc4.8', 'gcc4.9', 'gcc5.3', 'gcc_musl',
+        'clang3.4', 'clang3.5', 'clang3.6', 'clang3.7', 'python2.7',
+        'python3.4', 'python3.5', 'python3.6', 'pypy', 'pypy3', 'python_alpine',
+        'all_the_cpythons', 'electron1.3', 'electron1.6', 'coreclr', 'cmake',
+        'cmake_vs2015', 'cmake_vs2017'
+    ],
+    default='default',
+    help='Selects compiler to use. Allowed values depend on the platform and language.'
+)
+argp.add_argument(
+    '--iomgr_platform',
+    choices=['native', 'uv'],
+    default='native',
+    help='Selects iomgr platform to build on')
+argp.add_argument(
+    '--build_only',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Perform all the build steps but don\'t run any tests.')
+argp.add_argument(
+    '--measure_cpu_costs',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Measure the cpu costs of tests')
+argp.add_argument(
+    '--update_submodules',
+    default=[],
+    nargs='*',
+    help='Update some submodules before building. If any are updated, also run generate_projects. '
+    +
+    'Submodules are specified as SUBMODULE_NAME:BRANCH; if BRANCH is omitted, master is assumed.'
+)
 argp.add_argument('-a', '--antagonists', default=0, type=int)
-argp.add_argument('-x', '--xml_report', default=None, type=str,
-        help='Generates a JUnit-compatible XML report')
-argp.add_argument('--report_suite_name', default='tests', type=str,
-        help='Test suite name to use in generated JUnit XML report')
-argp.add_argument('--quiet_success',
-                  default=False,
-                  action='store_const',
-                  const=True,
-                  help='Don\'t print anything when a test passes. Passing tests also will not be reported in XML report. ' +
-                       'Useful when running many iterations of each test (argument -n).')
-argp.add_argument('--force_default_poller', default=False, action='store_const', const=True,
-                  help='Don\'t try to iterate over many polling strategies when they exist')
-argp.add_argument('--force_use_pollers', default=None, type=str,
-                  help='Only use the specified comma-delimited list of polling engines. '
-                  'Example: --force_use_pollers epollsig,poll '
-                  ' (This flag has no effect if --force_default_poller flag is also used)')
-argp.add_argument('--max_time', default=-1, type=int, help='Maximum test runtime in seconds')
-argp.add_argument('--bq_result_table',
-                  default='',
-                  type=str,
-                  nargs='?',
-                  help='Upload test results to a specified BQ table.')
-argp.add_argument('--disable_auto_set_flakes', default=False, const=True, action='store_const',
-                  help='Disable rerunning historically flaky tests')
+argp.add_argument(
+    '-x',
+    '--xml_report',
+    default=None,
+    type=str,
+    help='Generates a JUnit-compatible XML report')
+argp.add_argument(
+    '--report_suite_name',
+    default='tests',
+    type=str,
+    help='Test suite name to use in generated JUnit XML report')
+argp.add_argument(
+    '--quiet_success',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Don\'t print anything when a test passes. Passing tests also will not be reported in XML report. '
+    + 'Useful when running many iterations of each test (argument -n).')
+argp.add_argument(
+    '--force_default_poller',
+    default=False,
+    action='store_const',
+    const=True,
+    help='Don\'t try to iterate over many polling strategies when they exist')
+argp.add_argument(
+    '--force_use_pollers',
+    default=None,
+    type=str,
+    help='Only use the specified comma-delimited list of polling engines. '
+    'Example: --force_use_pollers epollsig,poll '
+    ' (This flag has no effect if --force_default_poller flag is also used)')
+argp.add_argument(
+    '--max_time', default=-1, type=int, help='Maximum test runtime in seconds')
+argp.add_argument(
+    '--bq_result_table',
+    default='',
+    type=str,
+    nargs='?',
+    help='Upload test results to a specified BQ table.')
+argp.add_argument(
+    '--disable_auto_set_flakes',
+    default=False,
+    const=True,
+    action='store_const',
+    help='Disable rerunning historically flaky tests')
 args = argp.parse_args()
 
 flaky_tests = set()
 shortname_to_cpu = {}
 if not args.disable_auto_set_flakes:
-  try:
-    for test in get_bqtest_data():
-      if test.flaky: flaky_tests.add(test.name)
-      if test.cpu > 0: shortname_to_cpu[test.name] = test.cpu
-  except:
-    print("Unexpected error getting flaky tests: %s" % traceback.format_exc())
+    try:
+        for test in get_bqtest_data():
+            if test.flaky: flaky_tests.add(test.name)
+            if test.cpu > 0: shortname_to_cpu[test.name] = test.cpu
+    except:
+        print("Unexpected error getting flaky tests: %s" %
+              traceback.format_exc())
 
 if args.force_default_poller:
-  _POLLING_STRATEGIES = {}
+    _POLLING_STRATEGIES = {}
 elif args.force_use_pollers:
-  _POLLING_STRATEGIES[platform_string()] = args.force_use_pollers.split(',')
+    _POLLING_STRATEGIES[platform_string()] = args.force_use_pollers.split(',')
 
 jobset.measure_cpu_costs = args.measure_cpu_costs
 
 # update submodules if necessary
 need_to_regenerate_projects = False
 for spec in args.update_submodules:
-  spec = spec.split(':', 1)
-  if len(spec) == 1:
-    submodule = spec[0]
-    branch = 'master'
-  elif len(spec) == 2:
-    submodule = spec[0]
-    branch = spec[1]
-  cwd = 'third_party/%s' % submodule
-  def git(cmd, cwd=cwd):
-    print('in %s: git %s' % (cwd, cmd))
-    run_shell_command('git %s' % cmd, cwd=cwd)
-  git('fetch')
-  git('checkout %s' % branch)
-  git('pull origin %s' % branch)
-  if os.path.exists('src/%s/gen_build_yaml.py' % submodule):
-    need_to_regenerate_projects = True
+    spec = spec.split(':', 1)
+    if len(spec) == 1:
+        submodule = spec[0]
+        branch = 'master'
+    elif len(spec) == 2:
+        submodule = spec[0]
+        branch = spec[1]
+    cwd = 'third_party/%s' % submodule
+
+    def git(cmd, cwd=cwd):
+        print('in %s: git %s' % (cwd, cmd))
+        run_shell_command('git %s' % cmd, cwd=cwd)
+
+    git('fetch')
+    git('checkout %s' % branch)
+    git('pull origin %s' % branch)
+    if os.path.exists('src/%s/gen_build_yaml.py' % submodule):
+        need_to_regenerate_projects = True
 if need_to_regenerate_projects:
-  if jobset.platform_string() == 'linux':
-    run_shell_command('tools/buildgen/generate_projects.sh')
-  else:
-    print('WARNING: may need to regenerate projects, but since we are not on')
-    print('         Linux this step is being skipped. Compilation MAY fail.')
-
+    if jobset.platform_string() == 'linux':
+        run_shell_command('tools/buildgen/generate_projects.sh')
+    else:
+        print(
+            'WARNING: may need to regenerate projects, but since we are not on')
+        print(
+            '         Linux this step is being skipped. Compilation MAY fail.')
 
 # grab config
 run_config = _CONFIGS[args.config]
 build_config = run_config.build_config
 
 if args.travis:
-  _FORCE_ENVIRON_FOR_WRAPPERS = {'GRPC_TRACE': 'api'}
+    _FORCE_ENVIRON_FOR_WRAPPERS = {'GRPC_TRACE': 'api'}
 
 if 'all' in args.language:
-  lang_list = _LANGUAGES.keys()
+    lang_list = _LANGUAGES.keys()
 else:
-  lang_list = args.language
+    lang_list = args.language
 # We don't support code coverage on some languages
 if 'gcov' in args.config:
-  for bad in ['objc', 'sanity']:
-    if bad in lang_list:
-      lang_list.remove(bad)
+    for bad in ['objc', 'sanity']:
+        if bad in lang_list:
+            lang_list.remove(bad)
 
 languages = set(_LANGUAGES[l] for l in lang_list)
 for l in languages:
-  l.configure(run_config, args)
+    l.configure(run_config, args)
 
-language_make_options=[]
+language_make_options = []
 if any(language.make_options() for language in languages):
-  if not 'gcov' in args.config and len(languages) != 1:
-    print('languages with custom make options cannot be built simultaneously with other languages')
-    sys.exit(1)
-  else:
-    # Combining make options is not clean and just happens to work. It allows C/C++ and C# to build
-    # together, and is only used under gcov. All other configs should build languages individually.
-    language_make_options = list(set([make_option for lang in languages for make_option in lang.make_options()]))
+    if not 'gcov' in args.config and len(languages) != 1:
+        print(
+            'languages with custom make options cannot be built simultaneously with other languages'
+        )
+        sys.exit(1)
+    else:
+        # Combining make options is not clean and just happens to work. It allows C/C++ and C# to build
+        # together, and is only used under gcov. All other configs should build languages individually.
+        language_make_options = list(
+            set([
+                make_option
+                for lang in languages for make_option in lang.make_options()
+            ]))
 
 if args.use_docker:
-  if not args.travis:
-    print('Seen --use_docker flag, will run tests under docker.')
-    print('')
-    print('IMPORTANT: The changes you are testing need to be locally committed')
-    print('because only the committed changes in the current branch will be')
-    print('copied to the docker environment.')
-    time.sleep(5)
-
-  dockerfile_dirs = set([l.dockerfile_dir() for l in languages])
-  if len(dockerfile_dirs) > 1:
-    if 'gcov' in args.config:
-      dockerfile_dir = 'tools/dockerfile/test/multilang_jessie_x64'
-      print ('Using multilang_jessie_x64 docker image for code coverage for '
-             'all languages.')
+    if not args.travis:
+        print('Seen --use_docker flag, will run tests under docker.')
+        print('')
+        print(
+            'IMPORTANT: The changes you are testing need to be locally committed'
+        )
+        print(
+            'because only the committed changes in the current branch will be')
+        print('copied to the docker environment.')
+        time.sleep(5)
+
+    dockerfile_dirs = set([l.dockerfile_dir() for l in languages])
+    if len(dockerfile_dirs) > 1:
+        if 'gcov' in args.config:
+            dockerfile_dir = 'tools/dockerfile/test/multilang_jessie_x64'
+            print(
+                'Using multilang_jessie_x64 docker image for code coverage for '
+                'all languages.')
+        else:
+            print(
+                'Languages to be tested require running under different docker '
+                'images.')
+            sys.exit(1)
     else:
-      print ('Languages to be tested require running under different docker '
-             'images.')
-      sys.exit(1)
-  else:
-    dockerfile_dir = next(iter(dockerfile_dirs))
-
-  child_argv = [ arg for arg in sys.argv if not arg == '--use_docker' ]
-  run_tests_cmd = 'python tools/run_tests/run_tests.py %s' % ' '.join(child_argv[1:])
-
-  env = os.environ.copy()
-  env['RUN_TESTS_COMMAND'] = run_tests_cmd
-  env['DOCKERFILE_DIR'] = dockerfile_dir
-  env['DOCKER_RUN_SCRIPT'] = 'tools/run_tests/dockerize/docker_run_tests.sh'
-  if args.xml_report:
-    env['XML_REPORT'] = args.xml_report
-  if not args.travis:
-    env['TTY_FLAG'] = '-t'  # enables Ctrl-C when not on Jenkins.
-
-  subprocess.check_call('tools/run_tests/dockerize/build_docker_and_run_tests.sh',
-                        shell=True,
-                        env=env)
-  sys.exit(0)
+        dockerfile_dir = next(iter(dockerfile_dirs))
+
+    child_argv = [arg for arg in sys.argv if not arg == '--use_docker']
+    run_tests_cmd = 'python tools/run_tests/run_tests.py %s' % ' '.join(
+        child_argv[1:])
+
+    env = os.environ.copy()
+    env['RUN_TESTS_COMMAND'] = run_tests_cmd
+    env['DOCKERFILE_DIR'] = dockerfile_dir
+    env['DOCKER_RUN_SCRIPT'] = 'tools/run_tests/dockerize/docker_run_tests.sh'
+    if args.xml_report:
+        env['XML_REPORT'] = args.xml_report
+    if not args.travis:
+        env['TTY_FLAG'] = '-t'  # enables Ctrl-C when not on Jenkins.
+
+    subprocess.check_call(
+        'tools/run_tests/dockerize/build_docker_and_run_tests.sh',
+        shell=True,
+        env=env)
+    sys.exit(0)
 
 _check_arch_option(args.arch)
 
+
 def make_jobspec(cfg, targets, makefile='Makefile'):
-  if platform_string() == 'windows':
-    return [jobset.JobSpec(['cmake', '--build', '.',
-                            '--target', '%s' % target,
-                            '--config', _MSBUILD_CONFIG[cfg]],
-                           cwd=os.path.dirname(makefile),
-                           timeout_seconds=None) for target in targets]
-  else:
-    if targets and makefile.startswith('cmake/build/'):
-      # With cmake, we've passed all the build configuration in the pre-build step already
-      return [jobset.JobSpec([os.getenv('MAKE', 'make'),
-                              '-j', '%d' % args.jobs] +
-                             targets,
-                             cwd='cmake/build',
-                             timeout_seconds=None)]
-    if targets:
-      return [jobset.JobSpec([os.getenv('MAKE', 'make'),
-                              '-f', makefile,
-                              '-j', '%d' % args.jobs,
-                              'EXTRA_DEFINES=GRPC_TEST_SLOWDOWN_MACHINE_FACTOR=%f' % args.slowdown,
-                              'CONFIG=%s' % cfg,
-                              'Q='] +
-                              language_make_options +
-                             ([] if not args.travis else ['JENKINS_BUILD=1']) +
-                             targets,
-                             timeout_seconds=None)]
+    if platform_string() == 'windows':
+        return [
+            jobset.JobSpec(
+                [
+                    'cmake', '--build', '.', '--target', '%s' % target,
+                    '--config', _MSBUILD_CONFIG[cfg]
+                ],
+                cwd=os.path.dirname(makefile),
+                timeout_seconds=None) for target in targets
+        ]
     else:
-      return []
+        if targets and makefile.startswith('cmake/build/'):
+            # With cmake, we've passed all the build configuration in the pre-build step already
+            return [
+                jobset.JobSpec(
+                    [os.getenv('MAKE', 'make'), '-j', '%d' % args.jobs] +
+                    targets,
+                    cwd='cmake/build',
+                    timeout_seconds=None)
+            ]
+        if targets:
+            return [
+                jobset.JobSpec(
+                    [
+                        os.getenv('MAKE', 'make'), '-f', makefile, '-j', '%d' %
+                        args.jobs,
+                        'EXTRA_DEFINES=GRPC_TEST_SLOWDOWN_MACHINE_FACTOR=%f' %
+                        args.slowdown, 'CONFIG=%s' % cfg, 'Q='
+                    ] + language_make_options +
+                    ([] if not args.travis else ['JENKINS_BUILD=1']) + targets,
+                    timeout_seconds=None)
+            ]
+        else:
+            return []
+
 
 make_targets = {}
 for l in languages:
-  makefile = l.makefile_name()
-  make_targets[makefile] = make_targets.get(makefile, set()).union(
-      set(l.make_targets()))
+    makefile = l.makefile_name()
+    make_targets[makefile] = make_targets.get(
+        makefile, set()).union(set(l.make_targets()))
+
 
 def build_step_environ(cfg):
-  environ = {'CONFIG': cfg}
-  msbuild_cfg = _MSBUILD_CONFIG.get(cfg)
-  if msbuild_cfg:
-    environ['MSBUILD_CONFIG'] = msbuild_cfg
-  return environ
-
-build_steps = list(set(
-                   jobset.JobSpec(cmdline, environ=build_step_environ(build_config), flake_retries=2)
-                   for l in languages
-                   for cmdline in l.pre_build_steps()))
+    environ = {'CONFIG': cfg}
+    msbuild_cfg = _MSBUILD_CONFIG.get(cfg)
+    if msbuild_cfg:
+        environ['MSBUILD_CONFIG'] = msbuild_cfg
+    return environ
+
+
+build_steps = list(
+    set(
+        jobset.JobSpec(
+            cmdline, environ=build_step_environ(build_config), flake_retries=2)
+        for l in languages for cmdline in l.pre_build_steps()))
 if make_targets:
-  make_commands = itertools.chain.from_iterable(make_jobspec(build_config, list(targets), makefile) for (makefile, targets) in make_targets.items())
-  build_steps.extend(set(make_commands))
-build_steps.extend(set(
-                   jobset.JobSpec(cmdline, environ=build_step_environ(build_config), timeout_seconds=None)
-                   for l in languages
-                   for cmdline in l.build_steps()))
-
-post_tests_steps = list(set(
-                        jobset.JobSpec(cmdline, environ=build_step_environ(build_config))
-                        for l in languages
-                        for cmdline in l.post_tests_steps()))
+    make_commands = itertools.chain.from_iterable(
+        make_jobspec(build_config, list(targets), makefile)
+        for (makefile, targets) in make_targets.items())
+    build_steps.extend(set(make_commands))
+build_steps.extend(
+    set(
+        jobset.JobSpec(
+            cmdline,
+            environ=build_step_environ(build_config),
+            timeout_seconds=None)
+        for l in languages for cmdline in l.build_steps()))
+
+post_tests_steps = list(
+    set(
+        jobset.JobSpec(cmdline, environ=build_step_environ(build_config))
+        for l in languages for cmdline in l.post_tests_steps()))
 runs_per_test = args.runs_per_test
 forever = args.forever
 
 
 def _shut_down_legacy_server(legacy_server_port):
-  try:
-    version = int(urllib.request.urlopen(
-        'http://localhost:%d/version_number' % legacy_server_port,
-        timeout=10).read())
-  except:
-    pass
-  else:
-    urllib.request.urlopen(
-        'http://localhost:%d/quitquitquit' % legacy_server_port).read()
+    try:
+        version = int(
+            urllib.request.urlopen(
+                'http://localhost:%d/version_number' % legacy_server_port,
+                timeout=10).read())
+    except:
+        pass
+    else:
+        urllib.request.urlopen('http://localhost:%d/quitquitquit' %
+                               legacy_server_port).read()
 
 
 def _calculate_num_runs_failures(list_of_results):
-  """Caculate number of runs and failures for a particular test.
+    """Caculate number of runs and failures for a particular test.
 
   Args:
     list_of_results: (List) of JobResult object.
   Returns:
     A tuple of total number of runs and failures.
   """
-  num_runs = len(list_of_results)  # By default, there is 1 run per JobResult.
-  num_failures = 0
-  for jobresult in list_of_results:
-    if jobresult.retries > 0:
-      num_runs += jobresult.retries
-    if jobresult.num_failures > 0:
-      num_failures += jobresult.num_failures
-  return num_runs, num_failures
+    num_runs = len(list_of_results)  # By default, there is 1 run per JobResult.
+    num_failures = 0
+    for jobresult in list_of_results:
+        if jobresult.retries > 0:
+            num_runs += jobresult.retries
+        if jobresult.num_failures > 0:
+            num_failures += jobresult.num_failures
+    return num_runs, num_failures
 
 
 # _build_and_run results
 class BuildAndRunError(object):
 
-  BUILD = object()
-  TEST = object()
-  POST_TEST = object()
+    BUILD = object()
+    TEST = object()
+    POST_TEST = object()
 
 
 def _has_epollexclusive():
-  binary = 'bins/%s/check_epollexclusive' % args.config
-  if not os.path.exists(binary):
-    return False
-  try:
-    subprocess.check_call(binary)
-    return True
-  except subprocess.CalledProcessError, e:
-    return False
-  except OSError, e:
-    # For languages other than C and Windows the binary won't exist
-    return False
+    binary = 'bins/%s/check_epollexclusive' % args.config
+    if not os.path.exists(binary):
+        return False
+    try:
+        subprocess.check_call(binary)
+        return True
+    except subprocess.CalledProcessError, e:
+        return False
+    except OSError, e:
+        # For languages other than C and Windows the binary won't exist
+        return False
 
 
 # returns a list of things that failed (or an empty list on success)
-def _build_and_run(
-    check_cancelled, newline_on_success, xml_report=None, build_only=False):
-  """Do one pass of building & running tests."""
-  # build latest sequentially
-  num_failures, resultset = jobset.run(
-      build_steps, maxjobs=1, stop_on_failure=True,
-      newline_on_success=newline_on_success, travis=args.travis)
-  if num_failures:
-    return [BuildAndRunError.BUILD]
-
-  if build_only:
-    if xml_report:
-      report_utils.render_junit_xml_report(resultset, xml_report,
-                                           suite_name=args.report_suite_name)
-    return []
-
-  if not args.travis and not _has_epollexclusive() and platform_string() in _POLLING_STRATEGIES and 'epollex' in _POLLING_STRATEGIES[platform_string()]:
-    print('\n\nOmitting EPOLLEXCLUSIVE tests\n\n')
-    _POLLING_STRATEGIES[platform_string()].remove('epollex')
-
-  # start antagonists
-  antagonists = [subprocess.Popen(['tools/run_tests/python_utils/antagonist.py'])
-                 for _ in range(0, args.antagonists)]
-  start_port_server.start_port_server()
-  resultset = None
-  num_test_failures = 0
-  try:
-    infinite_runs = runs_per_test == 0
-    one_run = set(
-      spec
-      for language in languages
-      for spec in language.test_specs()
-      if (re.search(args.regex, spec.shortname) and
-          (args.regex_exclude == '' or
-           not re.search(args.regex_exclude, spec.shortname))))
-    # When running on travis, we want out test runs to be as similar as possible
-    # for reproducibility purposes.
-    if args.travis and args.max_time <= 0:
-      massaged_one_run = sorted(one_run, key=lambda x: x.cpu_cost)
-    else:
-      # whereas otherwise, we want to shuffle things up to give all tests a
-      # chance to run.
-      massaged_one_run = list(one_run)  # random.sample needs an indexable seq.
-      num_jobs = len(massaged_one_run)
-      # for a random sample, get as many as indicated by the 'sample_percent'
-      # argument. By default this arg is 100, resulting in a shuffle of all
-      # jobs.
-      sample_size = int(num_jobs * args.sample_percent/100.0)
-      massaged_one_run = random.sample(massaged_one_run, sample_size)
-      if not isclose(args.sample_percent, 100.0):
-        assert args.runs_per_test == 1, "Can't do sampling (-p) over multiple runs (-n)."
-        print("Running %d tests out of %d (~%d%%)" %
-              (sample_size, num_jobs, args.sample_percent))
-    if infinite_runs:
-      assert len(massaged_one_run) > 0, 'Must have at least one test for a -n inf run'
-    runs_sequence = (itertools.repeat(massaged_one_run) if infinite_runs
-                     else itertools.repeat(massaged_one_run, runs_per_test))
-    all_runs = itertools.chain.from_iterable(runs_sequence)
-
-    if args.quiet_success:
-      jobset.message('START', 'Running tests quietly, only failing tests will be reported', do_newline=True)
-    num_test_failures, resultset = jobset.run(
-        all_runs, check_cancelled, newline_on_success=newline_on_success,
-        travis=args.travis, maxjobs=args.jobs, maxjobs_cpu_agnostic=max_parallel_tests_for_current_platform(),
-        stop_on_failure=args.stop_on_failure,
-        quiet_success=args.quiet_success, max_time=args.max_time)
-    if resultset:
-      for k, v in sorted(resultset.items()):
-        num_runs, num_failures = _calculate_num_runs_failures(v)
-        if num_failures > 0:
-          if num_failures == num_runs:  # what about infinite_runs???
-            jobset.message('FAILED', k, do_newline=True)
-          else:
+def _build_and_run(check_cancelled,
+                   newline_on_success,
+                   xml_report=None,
+                   build_only=False):
+    """Do one pass of building & running tests."""
+    # build latest sequentially
+    num_failures, resultset = jobset.run(
+        build_steps,
+        maxjobs=1,
+        stop_on_failure=True,
+        newline_on_success=newline_on_success,
+        travis=args.travis)
+    if num_failures:
+        return [BuildAndRunError.BUILD]
+
+    if build_only:
+        if xml_report:
+            report_utils.render_junit_xml_report(
+                resultset, xml_report, suite_name=args.report_suite_name)
+        return []
+
+    if not args.travis and not _has_epollexclusive() and platform_string(
+    ) in _POLLING_STRATEGIES and 'epollex' in _POLLING_STRATEGIES[
+            platform_string()]:
+        print('\n\nOmitting EPOLLEXCLUSIVE tests\n\n')
+        _POLLING_STRATEGIES[platform_string()].remove('epollex')
+
+    # start antagonists
+    antagonists = [
+        subprocess.Popen(['tools/run_tests/python_utils/antagonist.py'])
+        for _ in range(0, args.antagonists)
+    ]
+    start_port_server.start_port_server()
+    resultset = None
+    num_test_failures = 0
+    try:
+        infinite_runs = runs_per_test == 0
+        one_run = set(spec
+                      for language in languages
+                      for spec in language.test_specs()
+                      if (re.search(args.regex, spec.shortname) and (
+                          args.regex_exclude == '' or not re.search(
+                              args.regex_exclude, spec.shortname))))
+        # When running on travis, we want out test runs to be as similar as possible
+        # for reproducibility purposes.
+        if args.travis and args.max_time <= 0:
+            massaged_one_run = sorted(one_run, key=lambda x: x.cpu_cost)
+        else:
+            # whereas otherwise, we want to shuffle things up to give all tests a
+            # chance to run.
+            massaged_one_run = list(
+                one_run)  # random.sample needs an indexable seq.
+            num_jobs = len(massaged_one_run)
+            # for a random sample, get as many as indicated by the 'sample_percent'
+            # argument. By default this arg is 100, resulting in a shuffle of all
+            # jobs.
+            sample_size = int(num_jobs * args.sample_percent / 100.0)
+            massaged_one_run = random.sample(massaged_one_run, sample_size)
+            if not isclose(args.sample_percent, 100.0):
+                assert args.runs_per_test == 1, "Can't do sampling (-p) over multiple runs (-n)."
+                print("Running %d tests out of %d (~%d%%)" %
+                      (sample_size, num_jobs, args.sample_percent))
+        if infinite_runs:
+            assert len(massaged_one_run
+                      ) > 0, 'Must have at least one test for a -n inf run'
+        runs_sequence = (itertools.repeat(massaged_one_run) if infinite_runs
+                         else itertools.repeat(massaged_one_run, runs_per_test))
+        all_runs = itertools.chain.from_iterable(runs_sequence)
+
+        if args.quiet_success:
             jobset.message(
-                'FLAKE', '%s [%d/%d runs flaked]' % (k, num_failures, num_runs),
+                'START',
+                'Running tests quietly, only failing tests will be reported',
                 do_newline=True)
-  finally:
-    for antagonist in antagonists:
-      antagonist.kill()
-    if args.bq_result_table and resultset:
-      upload_results_to_bq(resultset, args.bq_result_table, args, platform_string())
-    if xml_report and resultset:
-      report_utils.render_junit_xml_report(resultset, xml_report,
-                                           suite_name=args.report_suite_name)
-
-  number_failures, _ = jobset.run(
-      post_tests_steps, maxjobs=1, stop_on_failure=False,
-      newline_on_success=newline_on_success, travis=args.travis)
+        num_test_failures, resultset = jobset.run(
+            all_runs,
+            check_cancelled,
+            newline_on_success=newline_on_success,
+            travis=args.travis,
+            maxjobs=args.jobs,
+            maxjobs_cpu_agnostic=max_parallel_tests_for_current_platform(),
+            stop_on_failure=args.stop_on_failure,
+            quiet_success=args.quiet_success,
+            max_time=args.max_time)
+        if resultset:
+            for k, v in sorted(resultset.items()):
+                num_runs, num_failures = _calculate_num_runs_failures(v)
+                if num_failures > 0:
+                    if num_failures == num_runs:  # what about infinite_runs???
+                        jobset.message('FAILED', k, do_newline=True)
+                    else:
+                        jobset.message(
+                            'FLAKE',
+                            '%s [%d/%d runs flaked]' %
+                            (k, num_failures, num_runs),
+                            do_newline=True)
+    finally:
+        for antagonist in antagonists:
+            antagonist.kill()
+        if args.bq_result_table and resultset:
+            upload_results_to_bq(resultset, args.bq_result_table, args,
+                                 platform_string())
+        if xml_report and resultset:
+            report_utils.render_junit_xml_report(
+                resultset, xml_report, suite_name=args.report_suite_name)
+
+    number_failures, _ = jobset.run(
+        post_tests_steps,
+        maxjobs=1,
+        stop_on_failure=False,
+        newline_on_success=newline_on_success,
+        travis=args.travis)
 
-  out = []
-  if number_failures:
-    out.append(BuildAndRunError.POST_TEST)
-  if num_test_failures:
-    out.append(BuildAndRunError.TEST)
+    out = []
+    if number_failures:
+        out.append(BuildAndRunError.POST_TEST)
+    if num_test_failures:
+        out.append(BuildAndRunError.TEST)
 
-  return out
+    return out
 
 
 if forever:
-  success = True
-  while True:
-    dw = watch_dirs.DirWatcher(['src', 'include', 'test', 'examples'])
-    initial_time = dw.most_recent_change()
-    have_files_changed = lambda: dw.most_recent_change() != initial_time
-    previous_success = success
-    errors = _build_and_run(check_cancelled=have_files_changed,
-                            newline_on_success=False,
-                            build_only=args.build_only) == 0
-    if not previous_success and not errors:
-      jobset.message('SUCCESS',
-                     'All tests are now passing properly',
-                     do_newline=True)
-    jobset.message('IDLE', 'No change detected')
-    while not have_files_changed():
-      time.sleep(1)
+    success = True
+    while True:
+        dw = watch_dirs.DirWatcher(['src', 'include', 'test', 'examples'])
+        initial_time = dw.most_recent_change()
+        have_files_changed = lambda: dw.most_recent_change() != initial_time
+        previous_success = success
+        errors = _build_and_run(
+            check_cancelled=have_files_changed,
+            newline_on_success=False,
+            build_only=args.build_only) == 0
+        if not previous_success and not errors:
+            jobset.message(
+                'SUCCESS',
+                'All tests are now passing properly',
+                do_newline=True)
+        jobset.message('IDLE', 'No change detected')
+        while not have_files_changed():
+            time.sleep(1)
 else:
-  errors = _build_and_run(check_cancelled=lambda: False,
-                          newline_on_success=args.newline_on_success,
-                          xml_report=args.xml_report,
-                          build_only=args.build_only)
-  if not errors:
-    jobset.message('SUCCESS', 'All tests passed', do_newline=True)
-  else:
-    jobset.message('FAILED', 'Some tests failed', do_newline=True)
-  exit_code = 0
-  if BuildAndRunError.BUILD in errors:
-    exit_code |= 1
-  if BuildAndRunError.TEST in errors:
-    exit_code |= 2
-  if BuildAndRunError.POST_TEST in errors:
-    exit_code |= 4
-  sys.exit(exit_code)
+    errors = _build_and_run(
+        check_cancelled=lambda: False,
+        newline_on_success=args.newline_on_success,
+        xml_report=args.xml_report,
+        build_only=args.build_only)
+    if not errors:
+        jobset.message('SUCCESS', 'All tests passed', do_newline=True)
+    else:
+        jobset.message('FAILED', 'Some tests failed', do_newline=True)
+    exit_code = 0
+    if BuildAndRunError.BUILD in errors:
+        exit_code |= 1
+    if BuildAndRunError.TEST in errors:
+        exit_code |= 2
+    if BuildAndRunError.POST_TEST in errors:
+        exit_code |= 4
+    sys.exit(exit_code)
diff --git a/tools/run_tests/run_tests_matrix.py b/tools/run_tests/run_tests_matrix.py
index 7c58d8efb1..49be8f1d7e 100755
--- a/tools/run_tests/run_tests_matrix.py
+++ b/tools/run_tests/run_tests_matrix.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Run test matrix."""
 
 from __future__ import print_function
@@ -29,14 +28,14 @@ from python_utils.filter_pull_request_tests import filter_tests
 _ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
 os.chdir(_ROOT)
 
-_DEFAULT_RUNTESTS_TIMEOUT = 1*60*60
+_DEFAULT_RUNTESTS_TIMEOUT = 1 * 60 * 60
 
 # Set the timeout high to allow enough time for sanitizers and pre-building
 # clang docker.
-_CPP_RUNTESTS_TIMEOUT = 4*60*60
+_CPP_RUNTESTS_TIMEOUT = 4 * 60 * 60
 
 # C++ TSAN takes longer than other sanitizers
-_CPP_TSAN_RUNTESTS_TIMEOUT = 8*60*60
+_CPP_TSAN_RUNTESTS_TIMEOUT = 8 * 60 * 60
 
 # Number of jobs assigned to each run_tests.py instance
 _DEFAULT_INNER_JOBS = 2
@@ -46,448 +45,517 @@ _REPORT_SUFFIX = 'sponge_log.xml'
 
 
 def _report_filename(name):
-  """Generates report file name"""
-  return 'report_%s_%s' % (name, _REPORT_SUFFIX)
+    """Generates report file name"""
+    return 'report_%s_%s' % (name, _REPORT_SUFFIX)
 
 
 def _report_filename_internal_ci(name):
-  """Generates report file name that leads to better presentation by internal CI"""
-  return '%s/%s' % (name, _REPORT_SUFFIX)
+    """Generates report file name that leads to better presentation by internal CI"""
+    return '%s/%s' % (name, _REPORT_SUFFIX)
 
 
-def _docker_jobspec(name, runtests_args=[], runtests_envs={},
+def _docker_jobspec(name,
+                    runtests_args=[],
+                    runtests_envs={},
                     inner_jobs=_DEFAULT_INNER_JOBS,
                     timeout_seconds=None):
-  """Run a single instance of run_tests.py in a docker container"""
-  if not timeout_seconds:
-    timeout_seconds = _DEFAULT_RUNTESTS_TIMEOUT
-  test_job = jobset.JobSpec(
-          cmdline=['python', 'tools/run_tests/run_tests.py',
-                   '--use_docker',
-                   '-t',
-                   '-j', str(inner_jobs),
-                   '-x', _report_filename(name),
-                   '--report_suite_name', '%s' % name] + runtests_args,
-          environ=runtests_envs,
-          shortname='run_tests_%s' % name,
-          timeout_seconds=timeout_seconds)
-  return test_job
-
-
-def _workspace_jobspec(name, runtests_args=[], workspace_name=None,
-                       runtests_envs={}, inner_jobs=_DEFAULT_INNER_JOBS,
+    """Run a single instance of run_tests.py in a docker container"""
+    if not timeout_seconds:
+        timeout_seconds = _DEFAULT_RUNTESTS_TIMEOUT
+    test_job = jobset.JobSpec(
+        cmdline=[
+            'python', 'tools/run_tests/run_tests.py', '--use_docker', '-t',
+            '-j', str(inner_jobs), '-x', _report_filename(name),
+            '--report_suite_name', '%s' % name
+        ] + runtests_args,
+        environ=runtests_envs,
+        shortname='run_tests_%s' % name,
+        timeout_seconds=timeout_seconds)
+    return test_job
+
+
+def _workspace_jobspec(name,
+                       runtests_args=[],
+                       workspace_name=None,
+                       runtests_envs={},
+                       inner_jobs=_DEFAULT_INNER_JOBS,
                        timeout_seconds=None):
-  """Run a single instance of run_tests.py in a separate workspace"""
-  if not workspace_name:
-    workspace_name = 'workspace_%s' % name
-  if not timeout_seconds:
-    timeout_seconds = _DEFAULT_RUNTESTS_TIMEOUT
-  env = {'WORKSPACE_NAME': workspace_name}
-  env.update(runtests_envs)
-  test_job = jobset.JobSpec(
-          cmdline=['bash',
-                   'tools/run_tests/helper_scripts/run_tests_in_workspace.sh',
-                   '-t',
-                   '-j', str(inner_jobs),
-                   '-x', '../%s' % _report_filename(name),
-                   '--report_suite_name', '%s' % name] + runtests_args,
-          environ=env,
-          shortname='run_tests_%s' % name,
-          timeout_seconds=timeout_seconds)
-  return test_job
-
-
-def _generate_jobs(languages, configs, platforms, iomgr_platform = 'native',
-                  arch=None, compiler=None,
-                  labels=[], extra_args=[], extra_envs={},
-                  inner_jobs=_DEFAULT_INNER_JOBS,
-                  timeout_seconds=None):
-  result = []
-  for language in languages:
-    for platform in platforms:
-      for config in configs:
-        name = '%s_%s_%s_%s' % (language, platform, config, iomgr_platform)
-        runtests_args = ['-l', language,
-                         '-c', config,
-                         '--iomgr_platform', iomgr_platform]
-        if arch or compiler:
-          name += '_%s_%s' % (arch, compiler)
-          runtests_args += ['--arch', arch,
-                            '--compiler', compiler]
-        if '--build_only' in extra_args:
-          name += '_buildonly'
-        for extra_env in extra_envs:
-          name += '_%s_%s' % (extra_env, extra_envs[extra_env])
-
-        runtests_args += extra_args
-        if platform == 'linux':
-          job = _docker_jobspec(name=name, runtests_args=runtests_args,
-                                runtests_envs=extra_envs, inner_jobs=inner_jobs,
-                                timeout_seconds=timeout_seconds)
-        else:
-          job = _workspace_jobspec(name=name, runtests_args=runtests_args,
-                                   runtests_envs=extra_envs, inner_jobs=inner_jobs,
-                                   timeout_seconds=timeout_seconds)
-
-        job.labels = [platform, config, language, iomgr_platform] + labels
-        result.append(job)
-  return result
+    """Run a single instance of run_tests.py in a separate workspace"""
+    if not workspace_name:
+        workspace_name = 'workspace_%s' % name
+    if not timeout_seconds:
+        timeout_seconds = _DEFAULT_RUNTESTS_TIMEOUT
+    env = {'WORKSPACE_NAME': workspace_name}
+    env.update(runtests_envs)
+    test_job = jobset.JobSpec(
+        cmdline=[
+            'bash', 'tools/run_tests/helper_scripts/run_tests_in_workspace.sh',
+            '-t', '-j', str(inner_jobs), '-x', '../%s' % _report_filename(name),
+            '--report_suite_name', '%s' % name
+        ] + runtests_args,
+        environ=env,
+        shortname='run_tests_%s' % name,
+        timeout_seconds=timeout_seconds)
+    return test_job
+
+
+def _generate_jobs(languages,
+                   configs,
+                   platforms,
+                   iomgr_platform='native',
+                   arch=None,
+                   compiler=None,
+                   labels=[],
+                   extra_args=[],
+                   extra_envs={},
+                   inner_jobs=_DEFAULT_INNER_JOBS,
+                   timeout_seconds=None):
+    result = []
+    for language in languages:
+        for platform in platforms:
+            for config in configs:
+                name = '%s_%s_%s_%s' % (language, platform, config,
+                                        iomgr_platform)
+                runtests_args = [
+                    '-l', language, '-c', config, '--iomgr_platform',
+                    iomgr_platform
+                ]
+                if arch or compiler:
+                    name += '_%s_%s' % (arch, compiler)
+                    runtests_args += ['--arch', arch, '--compiler', compiler]
+                if '--build_only' in extra_args:
+                    name += '_buildonly'
+                for extra_env in extra_envs:
+                    name += '_%s_%s' % (extra_env, extra_envs[extra_env])
+
+                runtests_args += extra_args
+                if platform == 'linux':
+                    job = _docker_jobspec(
+                        name=name,
+                        runtests_args=runtests_args,
+                        runtests_envs=extra_envs,
+                        inner_jobs=inner_jobs,
+                        timeout_seconds=timeout_seconds)
+                else:
+                    job = _workspace_jobspec(
+                        name=name,
+                        runtests_args=runtests_args,
+                        runtests_envs=extra_envs,
+                        inner_jobs=inner_jobs,
+                        timeout_seconds=timeout_seconds)
+
+                job.labels = [platform, config, language, iomgr_platform
+                             ] + labels
+                result.append(job)
+    return result
 
 
 def _create_test_jobs(extra_args=[], inner_jobs=_DEFAULT_INNER_JOBS):
-  test_jobs = []
-  # supported on linux only
-  test_jobs += _generate_jobs(languages=['sanity', 'php7'],
-                             configs=['dbg', 'opt'],
-                             platforms=['linux'],
-                             labels=['basictests', 'multilang'],
-                             extra_args=extra_args,
-                             inner_jobs=inner_jobs)
-
-  # supported on all platforms.
-  test_jobs += _generate_jobs(languages=['c'],
-                             configs=['dbg', 'opt'],
-                             platforms=['linux', 'macos', 'windows'],
-                             labels=['basictests', 'corelang'],
-                             extra_args=extra_args,
-                             inner_jobs=inner_jobs,
-                             timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
-
-  test_jobs += _generate_jobs(languages=['csharp', 'python'],
-                             configs=['dbg', 'opt'],
-                             platforms=['linux', 'macos', 'windows'],
-                             labels=['basictests', 'multilang'],
-                             extra_args=extra_args,
-                             inner_jobs=inner_jobs)
-
-  # supported on linux and mac.
-  test_jobs += _generate_jobs(languages=['c++'],
-                              configs=['dbg', 'opt'],
-                              platforms=['linux', 'macos'],
-                              labels=['basictests', 'corelang'],
-                              extra_args=extra_args,
-                              inner_jobs=inner_jobs,
-                              timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
-
-  test_jobs += _generate_jobs(languages=['grpc-node', 'ruby', 'php'],
-                              configs=['dbg', 'opt'],
-                              platforms=['linux', 'macos'],
-                              labels=['basictests', 'multilang'],
-                              extra_args=extra_args,
-                              inner_jobs=inner_jobs)
-
-  # supported on mac only.
-  test_jobs += _generate_jobs(languages=['objc'],
-                              configs=['dbg', 'opt'],
-                              platforms=['macos'],
-                              labels=['basictests', 'multilang'],
-                              extra_args=extra_args,
-                              inner_jobs=inner_jobs)
-
-  # sanitizers
-  test_jobs += _generate_jobs(languages=['c'],
-                              configs=['msan', 'asan', 'tsan', 'ubsan'],
-                              platforms=['linux'],
-                              labels=['sanitizers', 'corelang'],
-                              extra_args=extra_args,
-                              inner_jobs=inner_jobs,
-                              timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
-  test_jobs += _generate_jobs(languages=['c++'],
-                              configs=['asan'],
-                              platforms=['linux'],
-                              labels=['sanitizers', 'corelang'],
-                              extra_args=extra_args,
-                              inner_jobs=inner_jobs,
-                              timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
-  test_jobs += _generate_jobs(languages=['c++'],
-                              configs=['tsan'],
-                              platforms=['linux'],
-                              labels=['sanitizers', 'corelang'],
-                              extra_args=extra_args,
-                              inner_jobs=inner_jobs,
-                              timeout_seconds=_CPP_TSAN_RUNTESTS_TIMEOUT)
-
-  return test_jobs
-
-
-def _create_portability_test_jobs(extra_args=[], inner_jobs=_DEFAULT_INNER_JOBS):
-  test_jobs = []
-  # portability C x86
-  test_jobs += _generate_jobs(languages=['c'],
-                              configs=['dbg'],
-                              platforms=['linux'],
-                              arch='x86',
-                              compiler='default',
-                              labels=['portability', 'corelang'],
-                              extra_args=extra_args,
-                              inner_jobs=inner_jobs)
-
-  # portability C and C++ on x64
-  for compiler in ['gcc4.8', 'gcc5.3', 'gcc_musl',
-                   'clang3.5', 'clang3.6', 'clang3.7']:
-    test_jobs += _generate_jobs(languages=['c', 'c++'],
-                                configs=['dbg'],
-                                platforms=['linux'],
-                                arch='x64',
-                                compiler=compiler,
-                                labels=['portability', 'corelang'],
-                                extra_args=extra_args,
-                                inner_jobs=inner_jobs,
-                                timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
-
-  # portability C on Windows 64-bit (x86 is the default)
-  test_jobs += _generate_jobs(languages=['c'],
-                              configs=['dbg'],
-                              platforms=['windows'],
-                              arch='x64',
-                              compiler='default',
-                              labels=['portability', 'corelang'],
-                              extra_args=extra_args,
-                              inner_jobs=inner_jobs)
-
-  # portability C++ on Windows
-  # TODO(jtattermusch): some of the tests are failing, so we force --build_only
-  test_jobs += _generate_jobs(languages=['c++'],
-                              configs=['dbg'],
-                              platforms=['windows'],
-                              arch='default',
-                              compiler='default',
-                              labels=['portability', 'corelang'],
-                              extra_args=extra_args + ['--build_only'],
-                              inner_jobs=inner_jobs)
-
-  # portability C and C++ on Windows using VS2017 (build only)
-  # TODO(jtattermusch): some of the tests are failing, so we force --build_only
-  test_jobs += _generate_jobs(languages=['c', 'c++'],
-                              configs=['dbg'],
-                              platforms=['windows'],
-                              arch='x64',
-                              compiler='cmake_vs2017',
-                              labels=['portability', 'corelang'],
-                              extra_args=extra_args + ['--build_only'],
-                              inner_jobs=inner_jobs)
-
-  # C and C++ with the c-ares DNS resolver on Linux
-  test_jobs += _generate_jobs(languages=['c', 'c++'],
-                              configs=['dbg'], platforms=['linux'],
-                              labels=['portability', 'corelang'],
-                              extra_args=extra_args,
-                              extra_envs={'GRPC_DNS_RESOLVER': 'ares'},
-                              timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
-
-  # TODO(zyc): Turn on this test after adding c-ares support on windows.
-  # C with the c-ares DNS resolver on Windows
-  # test_jobs += _generate_jobs(languages=['c'],
-  #                             configs=['dbg'], platforms=['windows'],
-  #                             labels=['portability', 'corelang'],
-  #                             extra_args=extra_args,
-  #                             extra_envs={'GRPC_DNS_RESOLVER': 'ares'})
-
-  # C and C++ build with cmake on Linux
-  # TODO(jtattermusch): some of the tests are failing, so we force --build_only
-  # to make sure it's buildable at least.
-  test_jobs += _generate_jobs(languages=['c', 'c++'],
-                              configs=['dbg'],
-                              platforms=['linux'],
-                              arch='default',
-                              compiler='cmake',
-                              labels=['portability', 'corelang'],
-                              extra_args=extra_args + ['--build_only'],
-                              inner_jobs=inner_jobs)
-
-  test_jobs += _generate_jobs(languages=['python'],
-                              configs=['dbg'],
-                              platforms=['linux'],
-                              arch='default',
-                              compiler='python_alpine',
-                              labels=['portability', 'multilang'],
-                              extra_args=extra_args,
-                              inner_jobs=inner_jobs)
-
-  test_jobs += _generate_jobs(languages=['csharp'],
-                              configs=['dbg'],
-                              platforms=['linux'],
-                              arch='default',
-                              compiler='coreclr',
-                              labels=['portability', 'multilang'],
-                              extra_args=extra_args,
-                              inner_jobs=inner_jobs)
-
-  test_jobs += _generate_jobs(languages=['c'],
-                              configs=['dbg'],
-                              platforms=['linux'],
-                              iomgr_platform='uv',
-                              labels=['portability', 'corelang'],
-                              extra_args=extra_args,
-                              inner_jobs=inner_jobs,
-                              timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
-
-  return test_jobs
+    test_jobs = []
+    # supported on linux only
+    test_jobs += _generate_jobs(
+        languages=['sanity', 'php7'],
+        configs=['dbg', 'opt'],
+        platforms=['linux'],
+        labels=['basictests', 'multilang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs)
+
+    # supported on all platforms.
+    test_jobs += _generate_jobs(
+        languages=['c'],
+        configs=['dbg', 'opt'],
+        platforms=['linux', 'macos', 'windows'],
+        labels=['basictests', 'corelang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs,
+        timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
+
+    test_jobs += _generate_jobs(
+        languages=['csharp', 'python'],
+        configs=['dbg', 'opt'],
+        platforms=['linux', 'macos', 'windows'],
+        labels=['basictests', 'multilang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs)
+
+    # supported on linux and mac.
+    test_jobs += _generate_jobs(
+        languages=['c++'],
+        configs=['dbg', 'opt'],
+        platforms=['linux', 'macos'],
+        labels=['basictests', 'corelang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs,
+        timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
+
+    test_jobs += _generate_jobs(
+        languages=['grpc-node', 'ruby', 'php'],
+        configs=['dbg', 'opt'],
+        platforms=['linux', 'macos'],
+        labels=['basictests', 'multilang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs)
+
+    # supported on mac only.
+    test_jobs += _generate_jobs(
+        languages=['objc'],
+        configs=['dbg', 'opt'],
+        platforms=['macos'],
+        labels=['basictests', 'multilang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs)
+
+    # sanitizers
+    test_jobs += _generate_jobs(
+        languages=['c'],
+        configs=['msan', 'asan', 'tsan', 'ubsan'],
+        platforms=['linux'],
+        labels=['sanitizers', 'corelang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs,
+        timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
+    test_jobs += _generate_jobs(
+        languages=['c++'],
+        configs=['asan'],
+        platforms=['linux'],
+        labels=['sanitizers', 'corelang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs,
+        timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
+    test_jobs += _generate_jobs(
+        languages=['c++'],
+        configs=['tsan'],
+        platforms=['linux'],
+        labels=['sanitizers', 'corelang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs,
+        timeout_seconds=_CPP_TSAN_RUNTESTS_TIMEOUT)
+
+    return test_jobs
+
+
+def _create_portability_test_jobs(extra_args=[],
+                                  inner_jobs=_DEFAULT_INNER_JOBS):
+    test_jobs = []
+    # portability C x86
+    test_jobs += _generate_jobs(
+        languages=['c'],
+        configs=['dbg'],
+        platforms=['linux'],
+        arch='x86',
+        compiler='default',
+        labels=['portability', 'corelang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs)
+
+    # portability C and C++ on x64
+    for compiler in [
+            'gcc4.8', 'gcc5.3', 'gcc_musl', 'clang3.5', 'clang3.6', 'clang3.7'
+    ]:
+        test_jobs += _generate_jobs(
+            languages=['c', 'c++'],
+            configs=['dbg'],
+            platforms=['linux'],
+            arch='x64',
+            compiler=compiler,
+            labels=['portability', 'corelang'],
+            extra_args=extra_args,
+            inner_jobs=inner_jobs,
+            timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
+
+    # portability C on Windows 64-bit (x86 is the default)
+    test_jobs += _generate_jobs(
+        languages=['c'],
+        configs=['dbg'],
+        platforms=['windows'],
+        arch='x64',
+        compiler='default',
+        labels=['portability', 'corelang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs)
+
+    # portability C++ on Windows
+    # TODO(jtattermusch): some of the tests are failing, so we force --build_only
+    test_jobs += _generate_jobs(
+        languages=['c++'],
+        configs=['dbg'],
+        platforms=['windows'],
+        arch='default',
+        compiler='default',
+        labels=['portability', 'corelang'],
+        extra_args=extra_args + ['--build_only'],
+        inner_jobs=inner_jobs)
+
+    # portability C and C++ on Windows using VS2017 (build only)
+    # TODO(jtattermusch): some of the tests are failing, so we force --build_only
+    test_jobs += _generate_jobs(
+        languages=['c', 'c++'],
+        configs=['dbg'],
+        platforms=['windows'],
+        arch='x64',
+        compiler='cmake_vs2017',
+        labels=['portability', 'corelang'],
+        extra_args=extra_args + ['--build_only'],
+        inner_jobs=inner_jobs)
+
+    # C and C++ with the c-ares DNS resolver on Linux
+    test_jobs += _generate_jobs(
+        languages=['c', 'c++'],
+        configs=['dbg'],
+        platforms=['linux'],
+        labels=['portability', 'corelang'],
+        extra_args=extra_args,
+        extra_envs={'GRPC_DNS_RESOLVER': 'ares'},
+        timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
+
+    # TODO(zyc): Turn on this test after adding c-ares support on windows.
+    # C with the c-ares DNS resolver on Windows
+    # test_jobs += _generate_jobs(languages=['c'],
+    #                             configs=['dbg'], platforms=['windows'],
+    #                             labels=['portability', 'corelang'],
+    #                             extra_args=extra_args,
+    #                             extra_envs={'GRPC_DNS_RESOLVER': 'ares'})
+
+    # C and C++ build with cmake on Linux
+    # TODO(jtattermusch): some of the tests are failing, so we force --build_only
+    # to make sure it's buildable at least.
+    test_jobs += _generate_jobs(
+        languages=['c', 'c++'],
+        configs=['dbg'],
+        platforms=['linux'],
+        arch='default',
+        compiler='cmake',
+        labels=['portability', 'corelang'],
+        extra_args=extra_args + ['--build_only'],
+        inner_jobs=inner_jobs)
+
+    test_jobs += _generate_jobs(
+        languages=['python'],
+        configs=['dbg'],
+        platforms=['linux'],
+        arch='default',
+        compiler='python_alpine',
+        labels=['portability', 'multilang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs)
+
+    test_jobs += _generate_jobs(
+        languages=['csharp'],
+        configs=['dbg'],
+        platforms=['linux'],
+        arch='default',
+        compiler='coreclr',
+        labels=['portability', 'multilang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs)
+
+    test_jobs += _generate_jobs(
+        languages=['c'],
+        configs=['dbg'],
+        platforms=['linux'],
+        iomgr_platform='uv',
+        labels=['portability', 'corelang'],
+        extra_args=extra_args,
+        inner_jobs=inner_jobs,
+        timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
+
+    return test_jobs
 
 
 def _allowed_labels():
-  """Returns a list of existing job labels."""
-  all_labels = set()
-  for job in _create_test_jobs() + _create_portability_test_jobs():
-    for label in job.labels:
-      all_labels.add(label)
-  return sorted(all_labels)
+    """Returns a list of existing job labels."""
+    all_labels = set()
+    for job in _create_test_jobs() + _create_portability_test_jobs():
+        for label in job.labels:
+            all_labels.add(label)
+    return sorted(all_labels)
 
 
 def _runs_per_test_type(arg_str):
-  """Auxiliary function to parse the "runs_per_test" flag."""
-  try:
-    n = int(arg_str)
-    if n <= 0: raise ValueError
-    return n
-  except:
-    msg = '\'{}\' is not a positive integer'.format(arg_str)
-    raise argparse.ArgumentTypeError(msg)
+    """Auxiliary function to parse the "runs_per_test" flag."""
+    try:
+        n = int(arg_str)
+        if n <= 0: raise ValueError
+        return n
+    except:
+        msg = '\'{}\' is not a positive integer'.format(arg_str)
+        raise argparse.ArgumentTypeError(msg)
 
 
 if __name__ == "__main__":
-  argp = argparse.ArgumentParser(description='Run a matrix of run_tests.py tests.')
-  argp.add_argument('-j', '--jobs',
-                    default=multiprocessing.cpu_count()/_DEFAULT_INNER_JOBS,
-                    type=int,
-                    help='Number of concurrent run_tests.py instances.')
-  argp.add_argument('-f', '--filter',
-                    choices=_allowed_labels(),
-                    nargs='+',
-                    default=[],
-                    help='Filter targets to run by label with AND semantics.')
-  argp.add_argument('--exclude',
-                    choices=_allowed_labels(),
-                    nargs='+',
-                    default=[],
-                    help='Exclude targets with any of given labels.')
-  argp.add_argument('--build_only',
-                    default=False,
-                    action='store_const',
-                    const=True,
-                    help='Pass --build_only flag to run_tests.py instances.')
-  argp.add_argument('--force_default_poller', default=False, action='store_const', const=True,
-                    help='Pass --force_default_poller to run_tests.py instances.')
-  argp.add_argument('--dry_run',
-                    default=False,
-                    action='store_const',
-                    const=True,
-                    help='Only print what would be run.')
-  argp.add_argument('--filter_pr_tests',
-                    default=False,
-                    action='store_const',
-                    const=True,
-                    help='Filters out tests irrelevant to pull request changes.')
-  argp.add_argument('--base_branch',
-                    default='origin/master',
-                    type=str,
-                    help='Branch that pull request is requesting to merge into')
-  argp.add_argument('--inner_jobs',
-                    default=_DEFAULT_INNER_JOBS,
-                    type=int,
-                    help='Number of jobs in each run_tests.py instance')
-  argp.add_argument('-n', '--runs_per_test', default=1, type=_runs_per_test_type,
-                    help='How many times to run each tests. >1 runs implies ' +
-                    'omitting passing test from the output & reports.')
-  argp.add_argument('--max_time', default=-1, type=int,
-                    help='Maximum amount of time to run tests for' +
-                         '(other tests will be skipped)')
-  argp.add_argument('--internal_ci',
-                    default=False,
-                    action='store_const',
-                    const=True,
-                    help='Put reports into subdirectories to improve presentation of '
-                    'results by Internal CI.')
-  argp.add_argument('--bq_result_table',
-                    default='',
-                    type=str,
-                    nargs='?',
-                    help='Upload test results to a specified BQ table.')
-  args = argp.parse_args()
-
-  if args.internal_ci:
-    _report_filename = _report_filename_internal_ci  # override the function
-
-  extra_args = []
-  if args.build_only:
-    extra_args.append('--build_only')
-  if args.force_default_poller:
-    extra_args.append('--force_default_poller')
-  if args.runs_per_test > 1:
-    extra_args.append('-n')
-    extra_args.append('%s' % args.runs_per_test)
-    extra_args.append('--quiet_success')
-  if args.max_time > 0:
-    extra_args.extend(('--max_time', '%d' % args.max_time))
-  if args.bq_result_table:
-    extra_args.append('--bq_result_table')
-    extra_args.append('%s' % args.bq_result_table)
-    extra_args.append('--measure_cpu_costs')
-    extra_args.append('--disable_auto_set_flakes')
-
-  all_jobs = _create_test_jobs(extra_args=extra_args, inner_jobs=args.inner_jobs) + \
-             _create_portability_test_jobs(extra_args=extra_args, inner_jobs=args.inner_jobs)
-
-  jobs = []
-  for job in all_jobs:
-    if not args.filter or all(filter in job.labels for filter in args.filter):
-      if not any(exclude_label in job.labels for exclude_label in args.exclude):
-        jobs.append(job)
-
-  if not jobs:
-    jobset.message('FAILED', 'No test suites match given criteria.',
-                   do_newline=True)
-    sys.exit(1)
-
-  print('IMPORTANT: The changes you are testing need to be locally committed')
-  print('because only the committed changes in the current branch will be')
-  print('copied to the docker environment or into subworkspaces.')
-
-  skipped_jobs = []
-
-  if args.filter_pr_tests:
-    print('Looking for irrelevant tests to skip...')
-    relevant_jobs = filter_tests(jobs, args.base_branch)
-    if len(relevant_jobs) == len(jobs):
-      print('No tests will be skipped.')
-    else:
-      print('These tests will be skipped:')
-      skipped_jobs = list(set(jobs) - set(relevant_jobs))
-      # Sort by shortnames to make printing of skipped tests consistent
-      skipped_jobs.sort(key=lambda job: job.shortname)
-      for job in list(skipped_jobs):
-        print('  %s' % job.shortname)
-    jobs = relevant_jobs
-
-  print('Will run these tests:')
-  for job in jobs:
+    argp = argparse.ArgumentParser(
+        description='Run a matrix of run_tests.py tests.')
+    argp.add_argument(
+        '-j',
+        '--jobs',
+        default=multiprocessing.cpu_count() / _DEFAULT_INNER_JOBS,
+        type=int,
+        help='Number of concurrent run_tests.py instances.')
+    argp.add_argument(
+        '-f',
+        '--filter',
+        choices=_allowed_labels(),
+        nargs='+',
+        default=[],
+        help='Filter targets to run by label with AND semantics.')
+    argp.add_argument(
+        '--exclude',
+        choices=_allowed_labels(),
+        nargs='+',
+        default=[],
+        help='Exclude targets with any of given labels.')
+    argp.add_argument(
+        '--build_only',
+        default=False,
+        action='store_const',
+        const=True,
+        help='Pass --build_only flag to run_tests.py instances.')
+    argp.add_argument(
+        '--force_default_poller',
+        default=False,
+        action='store_const',
+        const=True,
+        help='Pass --force_default_poller to run_tests.py instances.')
+    argp.add_argument(
+        '--dry_run',
+        default=False,
+        action='store_const',
+        const=True,
+        help='Only print what would be run.')
+    argp.add_argument(
+        '--filter_pr_tests',
+        default=False,
+        action='store_const',
+        const=True,
+        help='Filters out tests irrelevant to pull request changes.')
+    argp.add_argument(
+        '--base_branch',
+        default='origin/master',
+        type=str,
+        help='Branch that pull request is requesting to merge into')
+    argp.add_argument(
+        '--inner_jobs',
+        default=_DEFAULT_INNER_JOBS,
+        type=int,
+        help='Number of jobs in each run_tests.py instance')
+    argp.add_argument(
+        '-n',
+        '--runs_per_test',
+        default=1,
+        type=_runs_per_test_type,
+        help='How many times to run each tests. >1 runs implies ' +
+        'omitting passing test from the output & reports.')
+    argp.add_argument(
+        '--max_time',
+        default=-1,
+        type=int,
+        help='Maximum amount of time to run tests for' +
+        '(other tests will be skipped)')
+    argp.add_argument(
+        '--internal_ci',
+        default=False,
+        action='store_const',
+        const=True,
+        help='Put reports into subdirectories to improve presentation of '
+        'results by Internal CI.')
+    argp.add_argument(
+        '--bq_result_table',
+        default='',
+        type=str,
+        nargs='?',
+        help='Upload test results to a specified BQ table.')
+    args = argp.parse_args()
+
+    if args.internal_ci:
+        _report_filename = _report_filename_internal_ci  # override the function
+
+    extra_args = []
+    if args.build_only:
+        extra_args.append('--build_only')
+    if args.force_default_poller:
+        extra_args.append('--force_default_poller')
+    if args.runs_per_test > 1:
+        extra_args.append('-n')
+        extra_args.append('%s' % args.runs_per_test)
+        extra_args.append('--quiet_success')
+    if args.max_time > 0:
+        extra_args.extend(('--max_time', '%d' % args.max_time))
+    if args.bq_result_table:
+        extra_args.append('--bq_result_table')
+        extra_args.append('%s' % args.bq_result_table)
+        extra_args.append('--measure_cpu_costs')
+        extra_args.append('--disable_auto_set_flakes')
+
+    all_jobs = _create_test_jobs(extra_args=extra_args, inner_jobs=args.inner_jobs) + \
+               _create_portability_test_jobs(extra_args=extra_args, inner_jobs=args.inner_jobs)
+
+    jobs = []
+    for job in all_jobs:
+        if not args.filter or all(filter in job.labels
+                                  for filter in args.filter):
+            if not any(exclude_label in job.labels
+                       for exclude_label in args.exclude):
+                jobs.append(job)
+
+    if not jobs:
+        jobset.message(
+            'FAILED', 'No test suites match given criteria.', do_newline=True)
+        sys.exit(1)
+
+    print('IMPORTANT: The changes you are testing need to be locally committed')
+    print('because only the committed changes in the current branch will be')
+    print('copied to the docker environment or into subworkspaces.')
+
+    skipped_jobs = []
+
+    if args.filter_pr_tests:
+        print('Looking for irrelevant tests to skip...')
+        relevant_jobs = filter_tests(jobs, args.base_branch)
+        if len(relevant_jobs) == len(jobs):
+            print('No tests will be skipped.')
+        else:
+            print('These tests will be skipped:')
+            skipped_jobs = list(set(jobs) - set(relevant_jobs))
+            # Sort by shortnames to make printing of skipped tests consistent
+            skipped_jobs.sort(key=lambda job: job.shortname)
+            for job in list(skipped_jobs):
+                print('  %s' % job.shortname)
+        jobs = relevant_jobs
+
+    print('Will run these tests:')
+    for job in jobs:
+        if args.dry_run:
+            print('  %s: "%s"' % (job.shortname, ' '.join(job.cmdline)))
+        else:
+            print('  %s' % job.shortname)
+    print
+
     if args.dry_run:
-      print('  %s: "%s"' % (job.shortname, ' '.join(job.cmdline)))
+        print('--dry_run was used, exiting')
+        sys.exit(1)
+
+    jobset.message('START', 'Running test matrix.', do_newline=True)
+    num_failures, resultset = jobset.run(
+        jobs, newline_on_success=True, travis=True, maxjobs=args.jobs)
+    # Merge skipped tests into results to show skipped tests on report.xml
+    if skipped_jobs:
+        ignored_num_skipped_failures, skipped_results = jobset.run(
+            skipped_jobs, skip_jobs=True)
+        resultset.update(skipped_results)
+    report_utils.render_junit_xml_report(
+        resultset,
+        _report_filename('aggregate_tests'),
+        suite_name='aggregate_tests')
+
+    if num_failures == 0:
+        jobset.message(
+            'SUCCESS',
+            'All run_tests.py instance finished successfully.',
+            do_newline=True)
     else:
-      print('  %s' % job.shortname)
-  print
-
-  if args.dry_run:
-    print('--dry_run was used, exiting')
-    sys.exit(1)
-
-  jobset.message('START', 'Running test matrix.', do_newline=True)
-  num_failures, resultset = jobset.run(jobs,
-                                       newline_on_success=True,
-                                       travis=True,
-                                       maxjobs=args.jobs)
-  # Merge skipped tests into results to show skipped tests on report.xml
-  if skipped_jobs:
-    ignored_num_skipped_failures, skipped_results = jobset.run(
-        skipped_jobs, skip_jobs=True)
-    resultset.update(skipped_results)
-  report_utils.render_junit_xml_report(resultset, _report_filename('aggregate_tests'),
-                                       suite_name='aggregate_tests')
-
-  if num_failures == 0:
-    jobset.message('SUCCESS', 'All run_tests.py instance finished successfully.',
-                   do_newline=True)
-  else:
-    jobset.message('FAILED', 'Some run_tests.py instance have failed.',
-                   do_newline=True)
-    sys.exit(1)
+        jobset.message(
+            'FAILED',
+            'Some run_tests.py instance have failed.',
+            do_newline=True)
+        sys.exit(1)
diff --git a/tools/run_tests/sanity/check_bazel_workspace.py b/tools/run_tests/sanity/check_bazel_workspace.py
index 776c78b03f..b5a77f4479 100755
--- a/tools/run_tests/sanity/check_bazel_workspace.py
+++ b/tools/run_tests/sanity/check_bazel_workspace.py
@@ -27,23 +27,37 @@ os.chdir(os.path.join(os.path.dirname(sys.argv[0]), '../../..'))
 git_hash_pattern = re.compile('[0-9a-f]{40}')
 
 # Parse git hashes from submodules
-git_submodules = subprocess.check_output('git submodule', shell=True).strip().split('\n')
-git_submodule_hashes = {re.search(git_hash_pattern, s).group() for s in git_submodules}
+git_submodules = subprocess.check_output(
+    'git submodule', shell=True).strip().split('\n')
+git_submodule_hashes = {
+    re.search(git_hash_pattern, s).group()
+    for s in git_submodules
+}
 
 # Parse git hashes from Bazel WORKSPACE {new_}http_archive rules
 with open('WORKSPACE', 'r') as f:
-  workspace_rules = [expr.value for expr in ast.parse(f.read()).body]
-
-http_archive_rules = [rule for rule in workspace_rules if rule.func.id.endswith('http_archive')]
-archive_urls = [kw.value.s for rule in http_archive_rules for kw in rule.keywords if kw.arg == 'url']
-workspace_git_hashes = {re.search(git_hash_pattern, url).group() for url in archive_urls}
+    workspace_rules = [expr.value for expr in ast.parse(f.read()).body]
+
+http_archive_rules = [
+    rule for rule in workspace_rules if rule.func.id.endswith('http_archive')
+]
+archive_urls = [
+    kw.value.s for rule in http_archive_rules for kw in rule.keywords
+    if kw.arg == 'url'
+]
+workspace_git_hashes = {
+    re.search(git_hash_pattern, url).group()
+    for url in archive_urls
+}
 
 # Validate the equivalence of the git submodules and Bazel git dependencies. The
 # condition we impose is that there is a git submodule for every dependency in
 # the workspace, but not necessarily conversely. E.g. Bloaty is a dependency
 # not used by any of the targets built by Bazel.
 if len(workspace_git_hashes - git_submodule_hashes) > 0:
-    print("Found discrepancies between git submodules and Bazel WORKSPACE dependencies")
+    print(
+        "Found discrepancies between git submodules and Bazel WORKSPACE dependencies"
+    )
     sys.exit(1)
 
 sys.exit(0)
diff --git a/tools/run_tests/sanity/check_sources_and_headers.py b/tools/run_tests/sanity/check_sources_and_headers.py
index cae175cfc3..6a704eb2e0 100755
--- a/tools/run_tests/sanity/check_sources_and_headers.py
+++ b/tools/run_tests/sanity/check_sources_and_headers.py
@@ -21,71 +21,109 @@ import re
 import sys
 
 root = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../../..'))
-with open(os.path.join(root, 'tools', 'run_tests', 'generated', 'sources_and_headers.json')) as f:
-  js = json.loads(f.read())
+with open(
+        os.path.join(root, 'tools', 'run_tests', 'generated',
+                     'sources_and_headers.json')) as f:
+    js = json.loads(f.read())
 
 re_inc1 = re.compile(r'^#\s*include\s*"([^"]*)"')
 assert re_inc1.match('#include "foo"').group(1) == 'foo'
 re_inc2 = re.compile(r'^#\s*include\s*<((grpc|grpc\+\+)/[^"]*)>')
 assert re_inc2.match('#include <grpc++/foo>').group(1) == 'grpc++/foo'
 
+
 def get_target(name):
-  for target in js:
-    if target['name'] == name:
-      return target
-  assert False, 'no target %s' % name
+    for target in js:
+        if target['name'] == name:
+            return target
+    assert False, 'no target %s' % name
+
+
+def get_headers_transitive():
+    """Computes set of headers transitively provided by each target"""
+    target_headers_transitive = {}
+    for target in js:
+        target_name = target['name']
+        assert not target_headers_transitive.has_key(target_name)
+        target_headers_transitive[target_name] = set(target['headers'])
+
+    # Make sure each target's transitive headers contain those
+    # of their dependencies. If not, add them and continue doing
+    # so until we get a full pass over all targets without any updates.
+    closure_changed = True
+    while closure_changed:
+        closure_changed = False
+        for target in js:
+            target_name = target['name']
+            for dep in target['deps']:
+                headers = target_headers_transitive[target_name]
+                old_count = len(headers)
+                headers.update(target_headers_transitive[dep])
+                if old_count != len(headers):
+                    closure_changed = True
+    return target_headers_transitive
+
+
+# precompute transitive closure of headers provided by each target
+target_headers_transitive = get_headers_transitive()
+
 
 def target_has_header(target, name):
-  if name.startswith('absl/'): return True
-  # print target['name'], name
-  if name in target['headers']:
-    return True
-  for dep in target['deps']:
-    if target_has_header(get_target(dep), name):
-      return True
-  if name in ['src/core/lib/profiling/stap_probes.h',
-              'src/proto/grpc/reflection/v1alpha/reflection.grpc.pb.h']:
-    return True
-  return False
+    if name.startswith('absl/'): return True
+    # print target['name'], name
+    if name in target['headers']:
+        return True
+    for dep in target['deps']:
+        if target_has_header(get_target(dep), name):
+            return True
+    if name in [
+            'src/core/lib/profiling/stap_probes.h',
+            'src/proto/grpc/reflection/v1alpha/reflection.grpc.pb.h'
+    ]:
+        return True
+    return False
+
 
 def produces_object(name):
-  return os.path.splitext(name)[1] in ['.c', '.cc']
+    return os.path.splitext(name)[1] in ['.c', '.cc']
+
 
 c_ish = {}
 obj_producer_to_source = {'c': c_ish, 'c++': c_ish, 'csharp': {}}
 
 errors = 0
 for target in js:
-  if not target['third_party']:
-    for fn in target['src']:
-      with open(os.path.join(root, fn)) as f:
-        src = f.read().splitlines()
-      for line in src:
-        m = re_inc1.match(line)
-        if m:
-          if not target_has_header(target, m.group(1)):
-            print (
-              'target %s (%s) does not name header %s as a dependency' % (
-                target['name'], fn, m.group(1)))
-            errors += 1
-        m = re_inc2.match(line)
-        if m:
-          if not target_has_header(target, 'include/' + m.group(1)):
-            print (
-              'target %s (%s) does not name header %s as a dependency' % (
-                target['name'], fn, m.group(1)))
-            errors += 1
-  if target['type'] in ['lib', 'filegroup']:
-    for fn in target['src']:
-      language = target['language']
-      if produces_object(fn):
-        obj_base = os.path.splitext(os.path.basename(fn))[0]
-        if obj_base in obj_producer_to_source[language]:
-          if obj_producer_to_source[language][obj_base] != fn:
-            print (
-              'target %s (%s) produces an aliased object file with %s' % (
-                target['name'], fn, obj_producer_to_source[language][obj_base]))
-        else:
-          obj_producer_to_source[language][obj_base] = fn
+    if not target['third_party']:
+        for fn in target['src']:
+            with open(os.path.join(root, fn)) as f:
+                src = f.read().splitlines()
+            for line in src:
+                m = re_inc1.match(line)
+                if m:
+                    if not target_has_header(target, m.group(1)):
+                        print(
+                            'target %s (%s) does not name header %s as a dependency'
+                            % (target['name'], fn, m.group(1)))
+                        errors += 1
+                m = re_inc2.match(line)
+                if m:
+                    if not target_has_header(target, 'include/' + m.group(1)):
+                        print(
+                            'target %s (%s) does not name header %s as a dependency'
+                            % (target['name'], fn, m.group(1)))
+                        errors += 1
+    if target['type'] in ['lib', 'filegroup']:
+        for fn in target['src']:
+            language = target['language']
+            if produces_object(fn):
+                obj_base = os.path.splitext(os.path.basename(fn))[0]
+                if obj_base in obj_producer_to_source[language]:
+                    if obj_producer_to_source[language][obj_base] != fn:
+                        print(
+                            'target %s (%s) produces an aliased object file with %s'
+                            % (target['name'], fn,
+                               obj_producer_to_source[language][obj_base]))
+                else:
+                    obj_producer_to_source[language][obj_base] = fn
 
 assert errors == 0
diff --git a/tools/run_tests/sanity/check_test_filtering.py b/tools/run_tests/sanity/check_test_filtering.py
index ff4ecba8ab..c2a6399ae8 100755
--- a/tools/run_tests/sanity/check_test_filtering.py
+++ b/tools/run_tests/sanity/check_test_filtering.py
@@ -14,7 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-
 import os
 import sys
 import unittest
@@ -25,108 +24,138 @@ sys.path.insert(0, os.path.abspath('tools/run_tests/'))
 from run_tests_matrix import _create_test_jobs, _create_portability_test_jobs
 import python_utils.filter_pull_request_tests as filter_pull_request_tests
 
-_LIST_OF_LANGUAGE_LABELS = ['c', 'c++', 'csharp', 'grpc-node', 'objc', 'php', 'php7', 'python', 'ruby']
+_LIST_OF_LANGUAGE_LABELS = [
+    'c', 'c++', 'csharp', 'grpc-node', 'objc', 'php', 'php7', 'python', 'ruby'
+]
 _LIST_OF_PLATFORM_LABELS = ['linux', 'macos', 'windows']
 
+
 class TestFilteringTest(unittest.TestCase):
 
-  def generate_all_tests(self):
-    all_jobs = _create_test_jobs() + _create_portability_test_jobs()
-    self.assertIsNotNone(all_jobs)
-    return all_jobs
+    def generate_all_tests(self):
+        all_jobs = _create_test_jobs() + _create_portability_test_jobs()
+        self.assertIsNotNone(all_jobs)
+        return all_jobs
 
-  def test_filtering(self, changed_files=[], labels=_LIST_OF_LANGUAGE_LABELS):
-    """
+    def test_filtering(self, changed_files=[], labels=_LIST_OF_LANGUAGE_LABELS):
+        """
     Default args should filter no tests because changed_files is empty and
     default labels should be able to match all jobs
     :param changed_files: mock list of changed_files from pull request
     :param labels: list of job labels that should be skipped
     """
-    all_jobs = self.generate_all_tests()
-    # Replacing _get_changed_files function to allow specifying changed files in filter_tests function
-    def _get_changed_files(foo):
-      return changed_files
-    filter_pull_request_tests._get_changed_files = _get_changed_files
-    print()
-    filtered_jobs = filter_pull_request_tests.filter_tests(all_jobs, "test")
-
-    # Make sure sanity tests aren't being filtered out
-    sanity_tests_in_all_jobs = 0
-    sanity_tests_in_filtered_jobs = 0
-    for job in all_jobs:
-      if "sanity" in job.labels:
-        sanity_tests_in_all_jobs += 1
-    all_jobs = [job for job in all_jobs if "sanity" not in job.labels]
-    for job in filtered_jobs:
-      if "sanity" in job.labels:
-        sanity_tests_in_filtered_jobs += 1
-    filtered_jobs = [job for job in filtered_jobs if "sanity" not in job.labels]
-    self.assertEquals(sanity_tests_in_all_jobs, sanity_tests_in_filtered_jobs)
-
-    for label in labels:
-      for job in filtered_jobs:
-        self.assertNotIn(label, job.labels)
-
-    jobs_matching_labels = 0
-    for label in labels:
-      for job in all_jobs:
-        if (label in job.labels):
-          jobs_matching_labels += 1
-    self.assertEquals(len(filtered_jobs), len(all_jobs) - jobs_matching_labels)
-
-  def test_individual_language_filters(self):
-    # Changing unlisted file should trigger all languages
-    self.test_filtering(['ffffoo/bar.baz'], [_LIST_OF_LANGUAGE_LABELS])
-    # Changing core should trigger all tests
-    self.test_filtering(['src/core/foo.bar'], [_LIST_OF_LANGUAGE_LABELS])
-    # Testing individual languages
-    self.test_filtering(['test/core/foo.bar'], [label for label in _LIST_OF_LANGUAGE_LABELS if label not in
-                                                filter_pull_request_tests._CORE_TEST_SUITE.labels +
-                                                filter_pull_request_tests._CPP_TEST_SUITE.labels])
-    self.test_filtering(['src/cpp/foo.bar'], [label for label in _LIST_OF_LANGUAGE_LABELS if label not in
-                                              filter_pull_request_tests._CPP_TEST_SUITE.labels])
-    self.test_filtering(['src/csharp/foo.bar'], [label for label in _LIST_OF_LANGUAGE_LABELS if label not in
-                                                 filter_pull_request_tests._CSHARP_TEST_SUITE.labels])
-    self.test_filtering(['src/objective-c/foo.bar'], [label for label in _LIST_OF_LANGUAGE_LABELS if label not in
-                                                      filter_pull_request_tests._OBJC_TEST_SUITE.labels])
-    self.test_filtering(['src/php/foo.bar'], [label for label in _LIST_OF_LANGUAGE_LABELS if label not in
-                                              filter_pull_request_tests._PHP_TEST_SUITE.labels])
-    self.test_filtering(['src/python/foo.bar'], [label for label in _LIST_OF_LANGUAGE_LABELS if label not in
-                                                 filter_pull_request_tests._PYTHON_TEST_SUITE.labels])
-    self.test_filtering(['src/ruby/foo.bar'], [label for label in _LIST_OF_LANGUAGE_LABELS if label not in
-                                               filter_pull_request_tests._RUBY_TEST_SUITE.labels])
-
-  def test_combined_language_filters(self):
-    self.test_filtering(['src/cpp/foo.bar', 'test/core/foo.bar'],
-                        [label for label in _LIST_OF_LANGUAGE_LABELS if label not in
-                         filter_pull_request_tests._CPP_TEST_SUITE.labels and label not in
-                         filter_pull_request_tests._CORE_TEST_SUITE.labels])
-    self.test_filtering(['src/cpp/foo.bar', "src/csharp/foo.bar"],
-                        [label for label in _LIST_OF_LANGUAGE_LABELS if label not in
-                         filter_pull_request_tests._CPP_TEST_SUITE.labels and label not in
-                         filter_pull_request_tests._CSHARP_TEST_SUITE.labels])
-    self.test_filtering(['src/objective-c/foo.bar', 'src/php/foo.bar', "src/python/foo.bar", "src/ruby/foo.bar"],
-                        [label for label in _LIST_OF_LANGUAGE_LABELS if label not in
-                         filter_pull_request_tests._OBJC_TEST_SUITE.labels and label not in
-                         filter_pull_request_tests._PHP_TEST_SUITE.labels and label not in
-                         filter_pull_request_tests._PYTHON_TEST_SUITE.labels and label not in
-                         filter_pull_request_tests._RUBY_TEST_SUITE.labels])
-
-  def test_platform_filter(self):
-    self.test_filtering(['vsprojects/foo.bar'], [label for label in _LIST_OF_PLATFORM_LABELS if label not in
-                                                 filter_pull_request_tests._WINDOWS_TEST_SUITE.labels])
-
-  def test_whitelist(self):
-    whitelist = filter_pull_request_tests._WHITELIST_DICT
-    files_that_should_trigger_all_tests = ['src/core/foo.bar',
-                                           'some_file_not_on_the_white_list',
-                                           'BUILD',
-                                           'etc/roots.pem',
-                                           'Makefile',
-                                           'tools/foo']
-    for key in whitelist.keys():
-      for file_name in files_that_should_trigger_all_tests:
-        self.assertFalse(re.match(key, file_name))
+        all_jobs = self.generate_all_tests()
+
+        # Replacing _get_changed_files function to allow specifying changed files in filter_tests function
+        def _get_changed_files(foo):
+            return changed_files
+
+        filter_pull_request_tests._get_changed_files = _get_changed_files
+        print()
+        filtered_jobs = filter_pull_request_tests.filter_tests(all_jobs, "test")
+
+        # Make sure sanity tests aren't being filtered out
+        sanity_tests_in_all_jobs = 0
+        sanity_tests_in_filtered_jobs = 0
+        for job in all_jobs:
+            if "sanity" in job.labels:
+                sanity_tests_in_all_jobs += 1
+        all_jobs = [job for job in all_jobs if "sanity" not in job.labels]
+        for job in filtered_jobs:
+            if "sanity" in job.labels:
+                sanity_tests_in_filtered_jobs += 1
+        filtered_jobs = [
+            job for job in filtered_jobs if "sanity" not in job.labels
+        ]
+        self.assertEquals(sanity_tests_in_all_jobs,
+                          sanity_tests_in_filtered_jobs)
+
+        for label in labels:
+            for job in filtered_jobs:
+                self.assertNotIn(label, job.labels)
+
+        jobs_matching_labels = 0
+        for label in labels:
+            for job in all_jobs:
+                if (label in job.labels):
+                    jobs_matching_labels += 1
+        self.assertEquals(
+            len(filtered_jobs), len(all_jobs) - jobs_matching_labels)
+
+    def test_individual_language_filters(self):
+        # Changing unlisted file should trigger all languages
+        self.test_filtering(['ffffoo/bar.baz'], [_LIST_OF_LANGUAGE_LABELS])
+        # Changing core should trigger all tests
+        self.test_filtering(['src/core/foo.bar'], [_LIST_OF_LANGUAGE_LABELS])
+        # Testing individual languages
+        self.test_filtering(['test/core/foo.bar'], [
+            label for label in _LIST_OF_LANGUAGE_LABELS
+            if label not in filter_pull_request_tests._CORE_TEST_SUITE.labels +
+            filter_pull_request_tests._CPP_TEST_SUITE.labels
+        ])
+        self.test_filtering(['src/cpp/foo.bar'], [
+            label for label in _LIST_OF_LANGUAGE_LABELS
+            if label not in filter_pull_request_tests._CPP_TEST_SUITE.labels
+        ])
+        self.test_filtering(['src/csharp/foo.bar'], [
+            label for label in _LIST_OF_LANGUAGE_LABELS
+            if label not in filter_pull_request_tests._CSHARP_TEST_SUITE.labels
+        ])
+        self.test_filtering(['src/objective-c/foo.bar'], [
+            label for label in _LIST_OF_LANGUAGE_LABELS
+            if label not in filter_pull_request_tests._OBJC_TEST_SUITE.labels
+        ])
+        self.test_filtering(['src/php/foo.bar'], [
+            label for label in _LIST_OF_LANGUAGE_LABELS
+            if label not in filter_pull_request_tests._PHP_TEST_SUITE.labels
+        ])
+        self.test_filtering(['src/python/foo.bar'], [
+            label for label in _LIST_OF_LANGUAGE_LABELS
+            if label not in filter_pull_request_tests._PYTHON_TEST_SUITE.labels
+        ])
+        self.test_filtering(['src/ruby/foo.bar'], [
+            label for label in _LIST_OF_LANGUAGE_LABELS
+            if label not in filter_pull_request_tests._RUBY_TEST_SUITE.labels
+        ])
+
+    def test_combined_language_filters(self):
+        self.test_filtering(['src/cpp/foo.bar', 'test/core/foo.bar'], [
+            label for label in _LIST_OF_LANGUAGE_LABELS
+            if label not in filter_pull_request_tests._CPP_TEST_SUITE.labels and
+            label not in filter_pull_request_tests._CORE_TEST_SUITE.labels
+        ])
+        self.test_filtering(['src/cpp/foo.bar', "src/csharp/foo.bar"], [
+            label for label in _LIST_OF_LANGUAGE_LABELS
+            if label not in filter_pull_request_tests._CPP_TEST_SUITE.labels and
+            label not in filter_pull_request_tests._CSHARP_TEST_SUITE.labels
+        ])
+        self.test_filtering([
+            'src/objective-c/foo.bar', 'src/php/foo.bar', "src/python/foo.bar",
+            "src/ruby/foo.bar"
+        ], [
+            label for label in _LIST_OF_LANGUAGE_LABELS
+            if label not in filter_pull_request_tests._OBJC_TEST_SUITE.labels
+            and label not in filter_pull_request_tests._PHP_TEST_SUITE.labels
+            and label not in filter_pull_request_tests._PYTHON_TEST_SUITE.labels
+            and label not in filter_pull_request_tests._RUBY_TEST_SUITE.labels
+        ])
+
+    def test_platform_filter(self):
+        self.test_filtering(['vsprojects/foo.bar'], [
+            label for label in _LIST_OF_PLATFORM_LABELS
+            if label not in filter_pull_request_tests._WINDOWS_TEST_SUITE.labels
+        ])
+
+    def test_whitelist(self):
+        whitelist = filter_pull_request_tests._WHITELIST_DICT
+        files_that_should_trigger_all_tests = [
+            'src/core/foo.bar', 'some_file_not_on_the_white_list', 'BUILD',
+            'etc/roots.pem', 'Makefile', 'tools/foo'
+        ]
+        for key in whitelist.keys():
+            for file_name in files_that_should_trigger_all_tests:
+                self.assertFalse(re.match(key, file_name))
+
 
 if __name__ == '__main__':
-  unittest.main(verbosity=2)
+    unittest.main(verbosity=2)
diff --git a/tools/run_tests/sanity/check_tracer_sanity.py b/tools/run_tests/sanity/check_tracer_sanity.py
index 997ec79d02..c4c76530de 100755
--- a/tools/run_tests/sanity/check_tracer_sanity.py
+++ b/tools/run_tests/sanity/check_tracer_sanity.py
@@ -26,21 +26,22 @@ errors = 0
 tracers = []
 pattern = re.compile("GRPC_TRACER_INITIALIZER\((true|false), \"(.*)\"\)")
 for root, dirs, files in os.walk('src/core'):
-  for filename in files:
-    path = os.path.join(root, filename)
-    if os.path.splitext(path)[1] != '.c': continue
-    with open(path) as f:
-      text = f.read()
-    for o in pattern.findall(text):
-      tracers.append(o[1])
+    for filename in files:
+        path = os.path.join(root, filename)
+        if os.path.splitext(path)[1] != '.c': continue
+        with open(path) as f:
+            text = f.read()
+        for o in pattern.findall(text):
+            tracers.append(o[1])
 
 with open('doc/environment_variables.md') as f:
- text = f.read()
+    text = f.read()
 
 for t in tracers:
     if t not in text:
-        print("ERROR: tracer \"%s\" is not mentioned in doc/environment_variables.md" % t)
+        print(
+            "ERROR: tracer \"%s\" is not mentioned in doc/environment_variables.md"
+            % t)
         errors += 1
 
-
 assert errors == 0
diff --git a/tools/run_tests/sanity/check_version.py b/tools/run_tests/sanity/check_version.py
index b9b6bab26d..6154b2603e 100755
--- a/tools/run_tests/sanity/check_version.py
+++ b/tools/run_tests/sanity/check_version.py
@@ -31,56 +31,56 @@ sys.path.insert(0, os.path.abspath('tools/buildgen/plugins'))
 from expand_version import Version
 
 try:
-  branch_name = subprocess.check_output(
-    'git rev-parse --abbrev-ref HEAD',
-    shell=True)
+    branch_name = subprocess.check_output(
+        'git rev-parse --abbrev-ref HEAD', shell=True)
 except:
-  print('WARNING: not a git repository')
-  branch_name = None
+    print('WARNING: not a git repository')
+    branch_name = None
 
 if branch_name is not None:
-  m = re.match(r'^release-([0-9]+)_([0-9]+)$', branch_name)
-  if m:
-    print('RELEASE branch')
-    # version number should align with the branched version
-    check_version = lambda version: (
-      version.major == int(m.group(1)) and
-      version.minor == int(m.group(2)))
-    warning = 'Version key "%%s" value "%%s" should have a major version %s and minor version %s' % (m.group(1), m.group(2))
-  elif re.match(r'^debian/.*$', branch_name):
-    # no additional version checks for debian branches
-    check_version = lambda version: True
-  else:
-    # all other branches should have a -dev tag
-    check_version = lambda version: version.tag == 'dev'
-    warning = 'Version key "%s" value "%s" should have a -dev tag'
+    m = re.match(r'^release-([0-9]+)_([0-9]+)$', branch_name)
+    if m:
+        print('RELEASE branch')
+        # version number should align with the branched version
+        check_version = lambda version: (
+          version.major == int(m.group(1)) and
+          version.minor == int(m.group(2)))
+        warning = 'Version key "%%s" value "%%s" should have a major version %s and minor version %s' % (
+            m.group(1), m.group(2))
+    elif re.match(r'^debian/.*$', branch_name):
+        # no additional version checks for debian branches
+        check_version = lambda version: True
+    else:
+        # all other branches should have a -dev tag
+        check_version = lambda version: version.tag == 'dev'
+        warning = 'Version key "%s" value "%s" should have a -dev tag'
 else:
-  check_version = lambda version: True
+    check_version = lambda version: True
 
 with open('build.yaml', 'r') as f:
-  build_yaml = yaml.load(f.read())
+    build_yaml = yaml.load(f.read())
 
 settings = build_yaml['settings']
 
 top_version = Version(settings['version'])
 if not check_version(top_version):
-  errors += 1
-  print(warning % ('version', top_version))
+    errors += 1
+    print(warning % ('version', top_version))
 
 for tag, value in settings.iteritems():
-  if re.match(r'^[a-z]+_version$', tag):
-    value = Version(value)
-    if tag != 'core_version':
-      if value.major != top_version.major:
-        errors += 1
-        print('major version mismatch on %s: %d vs %d' % (tag, value.major,
-                                                          top_version.major))
-      if value.minor != top_version.minor:
-        errors += 1
-        print('minor version mismatch on %s: %d vs %d' % (tag, value.minor,
-                                                          top_version.minor))
-    if not check_version(value):
-      errors += 1
-      print(warning % (tag, value))
+    if re.match(r'^[a-z]+_version$', tag):
+        value = Version(value)
+        if tag != 'core_version':
+            if value.major != top_version.major:
+                errors += 1
+                print('major version mismatch on %s: %d vs %d' %
+                      (tag, value.major, top_version.major))
+            if value.minor != top_version.minor:
+                errors += 1
+                print('minor version mismatch on %s: %d vs %d' %
+                      (tag, value.minor, top_version.minor))
+        if not check_version(value):
+            errors += 1
+            print(warning % (tag, value))
 
 sys.exit(errors)
diff --git a/tools/run_tests/sanity/core_banned_functions.py b/tools/run_tests/sanity/core_banned_functions.py
index 1f13905484..9ee28964a5 100755
--- a/tools/run_tests/sanity/core_banned_functions.py
+++ b/tools/run_tests/sanity/core_banned_functions.py
@@ -36,26 +36,28 @@ BANNED_EXCEPT = {
     'grpc_wsa_error(': ['src/core/lib/iomgr/error.c'],
     'grpc_log_if_error(': ['src/core/lib/iomgr/error.c'],
     'grpc_slice_malloc(': ['src/core/lib/slice/slice.c'],
-    'grpc_closure_create(' : ['src/core/lib/iomgr/closure.c'],
-    'grpc_closure_init(' : ['src/core/lib/iomgr/closure.c'],
-    'grpc_closure_sched(' : ['src/core/lib/iomgr/closure.c'],
-    'grpc_closure_run(' : ['src/core/lib/iomgr/closure.c'],
-    'grpc_closure_list_sched(' : ['src/core/lib/iomgr/closure.c'],
-    'gpr_getenv_silent(' : ['src/core/lib/support/log.c', 'src/core/lib/support/env_linux.c', 
-                            'src/core/lib/support/env_posix.c', 'src/core/lib/support/env_windows.c'],
+    'grpc_closure_create(': ['src/core/lib/iomgr/closure.c'],
+    'grpc_closure_init(': ['src/core/lib/iomgr/closure.c'],
+    'grpc_closure_sched(': ['src/core/lib/iomgr/closure.c'],
+    'grpc_closure_run(': ['src/core/lib/iomgr/closure.c'],
+    'grpc_closure_list_sched(': ['src/core/lib/iomgr/closure.c'],
+    'gpr_getenv_silent(': [
+        'src/core/lib/support/log.c', 'src/core/lib/support/env_linux.c',
+        'src/core/lib/support/env_posix.c', 'src/core/lib/support/env_windows.c'
+    ],
 }
 
 errors = 0
 for root, dirs, files in os.walk('src/core'):
-  for filename in files:
-    path = os.path.join(root, filename)
-    if os.path.splitext(path)[1] != '.c': continue
-    with open(path) as f:
-      text = f.read()
-    for banned, exceptions in BANNED_EXCEPT.items():
-      if path in exceptions: continue
-      if banned in text:
-        print('Illegal use of "%s" in %s' % (banned, path))
-        errors += 1
+    for filename in files:
+        path = os.path.join(root, filename)
+        if os.path.splitext(path)[1] != '.c': continue
+        with open(path) as f:
+            text = f.read()
+        for banned, exceptions in BANNED_EXCEPT.items():
+            if path in exceptions: continue
+            if banned in text:
+                print('Illegal use of "%s" in %s' % (banned, path))
+                errors += 1
 
 assert errors == 0
diff --git a/tools/run_tests/start_port_server.py b/tools/run_tests/start_port_server.py
index 362875036f..0eeceb4ce9 100755
--- a/tools/run_tests/start_port_server.py
+++ b/tools/run_tests/start_port_server.py
@@ -13,7 +13,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """
 Wrapper around port server starting code.
 
diff --git a/tools/run_tests/task_runner.py b/tools/run_tests/task_runner.py
index a065bb84cb..794db6e1be 100755
--- a/tools/run_tests/task_runner.py
+++ b/tools/run_tests/task_runner.py
@@ -12,7 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 """Runs selected gRPC test/build tasks."""
 
 from __future__ import print_function
@@ -32,52 +31,54 @@ _TARGETS += artifact_targets.targets()
 _TARGETS += distribtest_targets.targets()
 _TARGETS += package_targets.targets()
 
+
 def _create_build_map():
-  """Maps task names and labels to list of tasks to be built."""
-  target_build_map = dict([(target.name, [target])
-                           for target in _TARGETS])
-  if len(_TARGETS) > len(target_build_map.keys()):
-    raise Exception('Target names need to be unique')
-
-  label_build_map = {}
-  label_build_map['all'] = [t for t in _TARGETS]  # to build all targets
-  for target in _TARGETS:
-    for label in target.labels:
-      if label in label_build_map:
-        label_build_map[label].append(target)
-      else:
-        label_build_map[label] = [target]
-
-  if set(target_build_map.keys()).intersection(label_build_map.keys()):
-    raise Exception('Target names need to be distinct from label names')
-  return dict( target_build_map.items() + label_build_map.items())
+    """Maps task names and labels to list of tasks to be built."""
+    target_build_map = dict([(target.name, [target]) for target in _TARGETS])
+    if len(_TARGETS) > len(target_build_map.keys()):
+        raise Exception('Target names need to be unique')
+
+    label_build_map = {}
+    label_build_map['all'] = [t for t in _TARGETS]  # to build all targets
+    for target in _TARGETS:
+        for label in target.labels:
+            if label in label_build_map:
+                label_build_map[label].append(target)
+            else:
+                label_build_map[label] = [target]
+
+    if set(target_build_map.keys()).intersection(label_build_map.keys()):
+        raise Exception('Target names need to be distinct from label names')
+    return dict(target_build_map.items() + label_build_map.items())
 
 
 _BUILD_MAP = _create_build_map()
 
 argp = argparse.ArgumentParser(description='Runs build/test targets.')
-argp.add_argument('-b', '--build',
-                  choices=sorted(_BUILD_MAP.keys()),
-                  nargs='+',
-                  default=['all'],
-                  help='Target name or target label to build.')
-argp.add_argument('-f', '--filter',
-                  choices=sorted(_BUILD_MAP.keys()),
-                  nargs='+',
-                  default=[],
-                  help='Filter targets to build with AND semantics.')
+argp.add_argument(
+    '-b',
+    '--build',
+    choices=sorted(_BUILD_MAP.keys()),
+    nargs='+',
+    default=['all'],
+    help='Target name or target label to build.')
+argp.add_argument(
+    '-f',
+    '--filter',
+    choices=sorted(_BUILD_MAP.keys()),
+    nargs='+',
+    default=[],
+    help='Filter targets to build with AND semantics.')
 argp.add_argument('-j', '--jobs', default=multiprocessing.cpu_count(), type=int)
-argp.add_argument('-t', '--travis',
-                  default=False,
-                  action='store_const',
-                  const=True)
+argp.add_argument(
+    '-t', '--travis', default=False, action='store_const', const=True)
 
 args = argp.parse_args()
 
 # Figure out which targets to build
 targets = []
 for label in args.build:
-  targets += _BUILD_MAP[label]
+    targets += _BUILD_MAP[label]
 
 # Among targets selected by -b, filter out those that don't match the filter
 targets = [t for t in targets if all(f in t.labels for f in args.filter)]
@@ -86,30 +87,29 @@ targets = sorted(set(targets))
 # Execute pre-build phase
 prebuild_jobs = []
 for target in targets:
-  prebuild_jobs += target.pre_build_jobspecs()
+    prebuild_jobs += target.pre_build_jobspecs()
 if prebuild_jobs:
-  num_failures, _ = jobset.run(
-    prebuild_jobs, newline_on_success=True, maxjobs=args.jobs)
-  if num_failures != 0:
-    jobset.message('FAILED', 'Pre-build phase failed.', do_newline=True)
-    sys.exit(1)
+    num_failures, _ = jobset.run(
+        prebuild_jobs, newline_on_success=True, maxjobs=args.jobs)
+    if num_failures != 0:
+        jobset.message('FAILED', 'Pre-build phase failed.', do_newline=True)
+        sys.exit(1)
 
 build_jobs = []
 for target in targets:
-  build_jobs.append(target.build_jobspec())
+    build_jobs.append(target.build_jobspec())
 if not build_jobs:
-  print('Nothing to build.')
-  sys.exit(1)
+    print('Nothing to build.')
+    sys.exit(1)
 
 jobset.message('START', 'Building targets.', do_newline=True)
 num_failures, resultset = jobset.run(
     build_jobs, newline_on_success=True, maxjobs=args.jobs)
-report_utils.render_junit_xml_report(resultset, 'report_taskrunner_sponge_log.xml',
-                                     suite_name='tasks')
+report_utils.render_junit_xml_report(
+    resultset, 'report_taskrunner_sponge_log.xml', suite_name='tasks')
 if num_failures == 0:
-  jobset.message('SUCCESS', 'All targets built successfully.',
-                 do_newline=True)
+    jobset.message(
+        'SUCCESS', 'All targets built successfully.', do_newline=True)
 else:
-  jobset.message('FAILED', 'Failed to build targets.',
-                 do_newline=True)
-  sys.exit(1)
+    jobset.message('FAILED', 'Failed to build targets.', do_newline=True)
+    sys.exit(1)