Merge remote-tracking branch 'upstream/master' into fix-stream-compression-config-interface

415 files changed, 13151 insertions, 5058 deletions

diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 2a4eacd998..094e43e470 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -3,5 +3,4 @@
 # repository as the source of truth for module ownership.
 /**/OWNERS @markdroth @nicolasnoble @ctiller
 /bazel/** @nicolasnoble @dgquintas @ctiller
-/src/compiler/cpp_generator.cc @vjpai
 /src/core/ext/filters/client_channel/** @markdroth @dgquintas @ctiller
diff --git a/.gitignore b/.gitignore
index 5e38f5fa01..5ccad2e4f2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,7 +16,7 @@ htmlcov/
 dist/
 *.egg
 py27/
-py34/
+py3[0-9]*/
 
 # Node installation output
 node_modules
diff --git a/BUILD b/BUILD
index 71a2e69555..eb75e81078 100644
--- a/BUILD
+++ b/BUILD
@@ -575,6 +575,10 @@ grpc_cc_library(
         "src/core/lib/compression/compression_internal.c",
         "src/core/lib/compression/message_compress.c",
         "src/core/lib/compression/stream_compression.c",
+        "src/core/lib/compression/stream_compression_gzip.c",
+        "src/core/lib/compression/stream_compression_identity.c",
+        "src/core/lib/debug/stats.c",
+        "src/core/lib/debug/stats_data.c",
         "src/core/lib/http/format_request.c",
         "src/core/lib/http/httpcli.c",
         "src/core/lib/http/parser.c",
@@ -691,8 +695,6 @@ grpc_cc_library(
         "src/core/lib/transport/timeout_encoding.c",
         "src/core/lib/transport/transport.c",
         "src/core/lib/transport/transport_op_string.c",
-        "src/core/lib/debug/stats.c",
-        "src/core/lib/debug/stats_data.c",
     ],
     hdrs = [
         "src/core/lib/channel/channel_args.h",
@@ -707,6 +709,10 @@ grpc_cc_library(
         "src/core/lib/compression/compression_internal.h",
         "src/core/lib/compression/message_compress.h",
         "src/core/lib/compression/stream_compression.h",
+        "src/core/lib/compression/stream_compression_gzip.h",
+        "src/core/lib/compression/stream_compression_identity.h",
+        "src/core/lib/debug/stats.h",
+        "src/core/lib/debug/stats_data.h",
         "src/core/lib/http/format_request.h",
         "src/core/lib/http/httpcli.h",
         "src/core/lib/http/parser.h",
@@ -809,8 +815,6 @@ grpc_cc_library(
         "src/core/lib/transport/timeout_encoding.h",
         "src/core/lib/transport/transport.h",
         "src/core/lib/transport/transport_impl.h",
-        "src/core/lib/debug/stats.h",
-        "src/core/lib/debug/stats_data.h",
     ],
     external_deps = [
         "zlib",
@@ -991,6 +995,7 @@ grpc_cc_library(
     name = "grpc_codegen",
     language = "c",
     public_hdrs = [
+        "include/grpc/impl/codegen/byte_buffer.h",
         "include/grpc/impl/codegen/byte_buffer_reader.h",
         "include/grpc/impl/codegen/compression_types.h",
         "include/grpc/impl/codegen/connectivity_state.h",
@@ -1489,6 +1494,7 @@ grpc_cc_library(
     public_hdrs = [
         "include/grpc++/impl/codegen/async_stream.h",
         "include/grpc++/impl/codegen/async_unary_call.h",
+        "include/grpc++/impl/codegen/byte_buffer.h",
         "include/grpc++/impl/codegen/call.h",
         "include/grpc++/impl/codegen/call_hook.h",
         "include/grpc++/impl/codegen/channel_interface.h",
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8673e65c75..464e783434 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -123,10 +123,8 @@ if("${gRPC_ZLIB_PROVIDER}" STREQUAL "module")
     set(gRPC_INSTALL FALSE)
   endif()
 elseif("${gRPC_ZLIB_PROVIDER}" STREQUAL "package")
-  find_package(ZLIB)
-  if(TARGET ZLIB::ZLIB)
-    set(_gRPC_ZLIB_LIBRARIES ZLIB::ZLIB)
-  endif()
+  find_package(ZLIB REQUIRED)
+  set(_gRPC_ZLIB_LIBRARIES ${ZLIB_LIBRARIES})
   set(_gRPC_FIND_ZLIB "if(NOT ZLIB_FOUND)\n  find_package(ZLIB)\nendif()")
 endif()
 
@@ -134,7 +132,8 @@ if("${gRPC_CARES_PROVIDER}" STREQUAL "module")
   if(NOT CARES_ROOT_DIR)
     set(CARES_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/third_party/cares/cares)
   endif()
-  set(CARES_STATIC ON)
+  set(CARES_SHARED OFF CACHE BOOL "disable shared library")
+  set(CARES_STATIC ON CACHE BOOL "link cares statically")
   set(CARES_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/third_party/cares/cares")
   add_subdirectory(third_party/cares/cares)
   if(TARGET c-ares)
@@ -145,7 +144,7 @@ if("${gRPC_CARES_PROVIDER}" STREQUAL "module")
     set(gRPC_INSTALL FALSE)
   endif()
 elseif("${gRPC_CARES_PROVIDER}" STREQUAL "package")
-  find_package(c-ares CONFIG)
+  find_package(c-ares REQUIRED CONFIG)
   if(TARGET c-ares::cares)
     set(_gRPC_CARES_LIBRARIES c-ares::cares)
   endif()
@@ -189,7 +188,7 @@ if("${gRPC_PROTOBUF_PROVIDER}" STREQUAL "module")
     set(gRPC_INSTALL FALSE)
   endif()
 elseif("${gRPC_PROTOBUF_PROVIDER}" STREQUAL "package")
-  find_package(Protobuf ${gRPC_PROTOBUF_PACKAGE_TYPE})
+  find_package(Protobuf REQUIRED ${gRPC_PROTOBUF_PACKAGE_TYPE})
   if(Protobuf_FOUND OR PROTOBUF_FOUND)
     if(TARGET protobuf::${_gRPC_PROTOBUF_LIBRARY_NAME})
       set(_gRPC_PROTOBUF_LIBRARIES protobuf::${_gRPC_PROTOBUF_LIBRARY_NAME})
@@ -234,11 +233,9 @@ if("${gRPC_SSL_PROVIDER}" STREQUAL "module")
     set(gRPC_INSTALL FALSE)
   endif()
 elseif("${gRPC_SSL_PROVIDER}" STREQUAL "package")
-  find_package(OpenSSL)
-  if(TARGET OpenSSL::SSL)
-    set(_gRPC_SSL_LIBRARIES OpenSSL::SSL)
-  endif()
-  set(_gRPC_FIND_SSL "if(NOT OpenSSL_FOUND)\n  find_package(OpenSSL)\nendif()")
+  find_package(OpenSSL REQUIRED)
+  set(_gRPC_SSL_LIBRARIES ${OPENSSL_LIBRARIES})
+  set(_gRPC_FIND_SSL "if(NOT OPENSSL_FOUND)\n  find_package(OpenSSL)\nendif()")
 endif()
 
 if("${gRPC_GFLAGS_PROVIDER}" STREQUAL "module")
@@ -764,6 +761,18 @@ add_dependencies(buildtests_cxx thread_stress_test)
 if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
 add_dependencies(buildtests_cxx writes_per_rpc_test)
 endif()
+if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
+add_dependencies(buildtests_cxx resolver_component_test_unsecure)
+endif()
+if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
+add_dependencies(buildtests_cxx resolver_component_test)
+endif()
+if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
+add_dependencies(buildtests_cxx resolver_component_tests_runner_invoker_unsecure)
+endif()
+if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
+add_dependencies(buildtests_cxx resolver_component_tests_runner_invoker)
+endif()
 
 add_custom_target(buildtests
   DEPENDS buildtests_c buildtests_cxx)
@@ -832,7 +841,7 @@ endif()
 
 
 target_include_directories(gpr
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -924,7 +933,7 @@ endif()
 
 
 target_include_directories(gpr_test_util
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -957,6 +966,8 @@ add_library(grpc
   src/core/lib/compression/compression_internal.c
   src/core/lib/compression/message_compress.c
   src/core/lib/compression/stream_compression.c
+  src/core/lib/compression/stream_compression_gzip.c
+  src/core/lib/compression/stream_compression_identity.c
   src/core/lib/debug/stats.c
   src/core/lib/debug/stats_data.c
   src/core/lib/http/format_request.c
@@ -1220,7 +1231,7 @@ endif()
 
 
 target_include_directories(grpc
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -1242,6 +1253,7 @@ target_link_libraries(grpc
 )
 
 foreach(_hdr
+  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -1306,6 +1318,8 @@ add_library(grpc_cronet
   src/core/lib/compression/compression_internal.c
   src/core/lib/compression/message_compress.c
   src/core/lib/compression/stream_compression.c
+  src/core/lib/compression/stream_compression_gzip.c
+  src/core/lib/compression/stream_compression_identity.c
   src/core/lib/debug/stats.c
   src/core/lib/debug/stats_data.c
   src/core/lib/http/format_request.c
@@ -1527,7 +1541,7 @@ endif()
 
 
 target_include_directories(grpc_cronet
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -1549,6 +1563,7 @@ target_link_libraries(grpc_cronet
 )
 
 foreach(_hdr
+  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -1623,6 +1638,8 @@ add_library(grpc_test_util
   src/core/lib/compression/compression_internal.c
   src/core/lib/compression/message_compress.c
   src/core/lib/compression/stream_compression.c
+  src/core/lib/compression/stream_compression_gzip.c
+  src/core/lib/compression/stream_compression_identity.c
   src/core/lib/debug/stats.c
   src/core/lib/debug/stats_data.c
   src/core/lib/http/format_request.c
@@ -1806,7 +1823,7 @@ endif()
 
 
 target_include_directories(grpc_test_util
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -1826,6 +1843,7 @@ target_link_libraries(grpc_test_util
 )
 
 foreach(_hdr
+  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -1884,6 +1902,8 @@ add_library(grpc_test_util_unsecure
   src/core/lib/compression/compression_internal.c
   src/core/lib/compression/message_compress.c
   src/core/lib/compression/stream_compression.c
+  src/core/lib/compression/stream_compression_gzip.c
+  src/core/lib/compression/stream_compression_identity.c
   src/core/lib/debug/stats.c
   src/core/lib/debug/stats_data.c
   src/core/lib/http/format_request.c
@@ -2067,7 +2087,7 @@ endif()
 
 
 target_include_directories(grpc_test_util_unsecure
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -2087,6 +2107,7 @@ target_link_libraries(grpc_test_util_unsecure
 )
 
 foreach(_hdr
+  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -2131,6 +2152,8 @@ add_library(grpc_unsecure
   src/core/lib/compression/compression_internal.c
   src/core/lib/compression/message_compress.c
   src/core/lib/compression/stream_compression.c
+  src/core/lib/compression/stream_compression_gzip.c
+  src/core/lib/compression/stream_compression_identity.c
   src/core/lib/debug/stats.c
   src/core/lib/debug/stats_data.c
   src/core/lib/http/format_request.c
@@ -2362,7 +2385,7 @@ endif()
 
 
 target_include_directories(grpc_unsecure
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -2383,6 +2406,7 @@ target_link_libraries(grpc_unsecure
 )
 
 foreach(_hdr
+  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -2451,7 +2475,7 @@ endif()
 
 
 target_include_directories(reconnect_server
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -2493,7 +2517,7 @@ endif()
 
 
 target_include_directories(test_tcp_server
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -2574,7 +2598,7 @@ endif()
 
 
 target_include_directories(grpc++
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -2692,6 +2716,7 @@ foreach(_hdr
   include/grpc/slice_buffer.h
   include/grpc/status.h
   include/grpc/support/workaround_list.h
+  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -2702,6 +2727,7 @@ foreach(_hdr
   include/grpc/impl/codegen/status.h
   include/grpc++/impl/codegen/async_stream.h
   include/grpc++/impl/codegen/async_unary_call.h
+  include/grpc++/impl/codegen/byte_buffer.h
   include/grpc++/impl/codegen/call.h
   include/grpc++/impl/codegen/call_hook.h
   include/grpc++/impl/codegen/channel_interface.h
@@ -2774,7 +2800,7 @@ protobuf_generate_grpc_cpp(
 )
 
 target_include_directories(grpc++_core_stats
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -2884,6 +2910,8 @@ add_library(grpc++_cronet
   src/core/lib/compression/compression_internal.c
   src/core/lib/compression/message_compress.c
   src/core/lib/compression/stream_compression.c
+  src/core/lib/compression/stream_compression_gzip.c
+  src/core/lib/compression/stream_compression_identity.c
   src/core/lib/debug/stats.c
   src/core/lib/debug/stats_data.c
   src/core/lib/http/format_request.c
@@ -3066,7 +3094,7 @@ endif()
 
 
 target_include_directories(grpc++_cronet
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -3185,6 +3213,7 @@ foreach(_hdr
   include/grpc/slice_buffer.h
   include/grpc/status.h
   include/grpc/support/workaround_list.h
+  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -3195,6 +3224,7 @@ foreach(_hdr
   include/grpc/impl/codegen/status.h
   include/grpc++/impl/codegen/async_stream.h
   include/grpc++/impl/codegen/async_unary_call.h
+  include/grpc++/impl/codegen/byte_buffer.h
   include/grpc++/impl/codegen/call.h
   include/grpc++/impl/codegen/call_hook.h
   include/grpc++/impl/codegen/channel_interface.h
@@ -3265,7 +3295,7 @@ protobuf_generate_grpc_cpp(
 )
 
 target_include_directories(grpc++_error_details
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -3330,7 +3360,7 @@ protobuf_generate_grpc_cpp(
 )
 
 target_include_directories(grpc++_proto_reflection_desc_db
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -3391,7 +3421,7 @@ protobuf_generate_grpc_cpp(
 )
 
 target_include_directories(grpc++_reflection
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -3449,7 +3479,7 @@ endif()
 
 
 target_include_directories(grpc++_test_config
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -3527,7 +3557,7 @@ protobuf_generate_grpc_cpp(
 )
 
 target_include_directories(grpc++_test_util
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -3555,6 +3585,7 @@ target_link_libraries(grpc++_test_util
 foreach(_hdr
   include/grpc++/impl/codegen/async_stream.h
   include/grpc++/impl/codegen/async_unary_call.h
+  include/grpc++/impl/codegen/byte_buffer.h
   include/grpc++/impl/codegen/call.h
   include/grpc++/impl/codegen/call_hook.h
   include/grpc++/impl/codegen/channel_interface.h
@@ -3582,6 +3613,7 @@ foreach(_hdr
   include/grpc++/impl/codegen/stub_options.h
   include/grpc++/impl/codegen/sync_stream.h
   include/grpc++/impl/codegen/time.h
+  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -3665,7 +3697,7 @@ protobuf_generate_grpc_cpp(
 )
 
 target_include_directories(grpc++_test_util_unsecure
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -3693,6 +3725,7 @@ target_link_libraries(grpc++_test_util_unsecure
 foreach(_hdr
   include/grpc++/impl/codegen/async_stream.h
   include/grpc++/impl/codegen/async_unary_call.h
+  include/grpc++/impl/codegen/byte_buffer.h
   include/grpc++/impl/codegen/call.h
   include/grpc++/impl/codegen/call_hook.h
   include/grpc++/impl/codegen/channel_interface.h
@@ -3720,6 +3753,7 @@ foreach(_hdr
   include/grpc++/impl/codegen/stub_options.h
   include/grpc++/impl/codegen/sync_stream.h
   include/grpc++/impl/codegen/time.h
+  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -3805,7 +3839,7 @@ endif()
 
 
 target_include_directories(grpc++_unsecure
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -3922,6 +3956,7 @@ foreach(_hdr
   include/grpc/slice_buffer.h
   include/grpc/status.h
   include/grpc/support/workaround_list.h
+  include/grpc/impl/codegen/byte_buffer.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -3932,6 +3967,7 @@ foreach(_hdr
   include/grpc/impl/codegen/status.h
   include/grpc++/impl/codegen/async_stream.h
   include/grpc++/impl/codegen/async_unary_call.h
+  include/grpc++/impl/codegen/byte_buffer.h
   include/grpc++/impl/codegen/call.h
   include/grpc++/impl/codegen/call_hook.h
   include/grpc++/impl/codegen/channel_interface.h
@@ -3995,7 +4031,7 @@ endif()
 
 
 target_include_directories(grpc_benchmark
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4054,7 +4090,7 @@ protobuf_generate_grpc_cpp(
 )
 
 target_include_directories(grpc_cli_libs
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4114,7 +4150,7 @@ endif()
 
 
 target_include_directories(grpc_plugin_support
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4192,7 +4228,7 @@ protobuf_generate_grpc_cpp(
 )
 
 target_include_directories(http2_client_main
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4247,7 +4283,7 @@ protobuf_generate_grpc_cpp(
 )
 
 target_include_directories(interop_client_helper
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4317,7 +4353,7 @@ protobuf_generate_grpc_cpp(
 )
 
 target_include_directories(interop_client_main
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4368,7 +4404,7 @@ endif()
 
 
 target_include_directories(interop_server_helper
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4437,7 +4473,7 @@ protobuf_generate_grpc_cpp(
 )
 
 target_include_directories(interop_server_lib
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4488,7 +4524,7 @@ endif()
 
 
 target_include_directories(interop_server_main
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4576,7 +4612,7 @@ protobuf_generate_grpc_cpp(
 )
 
 target_include_directories(qps
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4623,7 +4659,7 @@ endif()
 
 
 target_include_directories(grpc_csharp_ext
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4718,7 +4754,7 @@ endif()
 
 
 target_include_directories(ares
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4756,7 +4792,7 @@ endif()
 
 
 target_include_directories(bad_client_test
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4797,7 +4833,7 @@ endif()
 
 
 target_include_directories(bad_ssl_test_server
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4898,7 +4934,7 @@ endif()
 
 
 target_include_directories(end2end_tests
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -4999,7 +5035,7 @@ endif()
 
 
 target_include_directories(end2end_nosec_tests
-  PUBLIC $<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+  PUBLIC $<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
   PRIVATE ${BORINGSSL_ROOT_DIR}/include
   PRIVATE ${PROTOBUF_ROOT_DIR}/src
@@ -14125,6 +14161,178 @@ target_link_libraries(inproc_nosec_test
 
 endif (gRPC_BUILD_TESTS)
 if (gRPC_BUILD_TESTS)
+if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
+
+add_executable(resolver_component_test_unsecure
+  test/cpp/naming/resolver_component_test.cc
+  third_party/googletest/googletest/src/gtest-all.cc
+  third_party/googletest/googlemock/src/gmock-all.cc
+)
+
+
+target_include_directories(resolver_component_test_unsecure
+  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
+  PRIVATE third_party/googletest/googletest/include
+  PRIVATE third_party/googletest/googletest
+  PRIVATE third_party/googletest/googlemock/include
+  PRIVATE third_party/googletest/googlemock
+  PRIVATE ${_gRPC_PROTO_GENS_DIR}
+)
+
+target_link_libraries(resolver_component_test_unsecure
+  ${_gRPC_PROTOBUF_LIBRARIES}
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+  grpc++_test_util_unsecure
+  grpc_test_util_unsecure
+  gpr_test_util
+  grpc++_unsecure
+  grpc_unsecure
+  gpr
+  grpc++_test_config
+  ${_gRPC_GFLAGS_LIBRARIES}
+)
+
+endif()
+endif (gRPC_BUILD_TESTS)
+if (gRPC_BUILD_TESTS)
+if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
+
+add_executable(resolver_component_test
+  test/cpp/naming/resolver_component_test.cc
+  third_party/googletest/googletest/src/gtest-all.cc
+  third_party/googletest/googlemock/src/gmock-all.cc
+)
+
+
+target_include_directories(resolver_component_test
+  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
+  PRIVATE third_party/googletest/googletest/include
+  PRIVATE third_party/googletest/googletest
+  PRIVATE third_party/googletest/googlemock/include
+  PRIVATE third_party/googletest/googlemock
+  PRIVATE ${_gRPC_PROTO_GENS_DIR}
+)
+
+target_link_libraries(resolver_component_test
+  ${_gRPC_PROTOBUF_LIBRARIES}
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+  grpc++_test_util
+  grpc_test_util
+  gpr_test_util
+  grpc++
+  grpc
+  gpr
+  grpc++_test_config
+  ${_gRPC_GFLAGS_LIBRARIES}
+)
+
+endif()
+endif (gRPC_BUILD_TESTS)
+if (gRPC_BUILD_TESTS)
+if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
+
+add_executable(resolver_component_tests_runner_invoker_unsecure
+  test/cpp/naming/resolver_component_tests_runner_invoker.cc
+  third_party/googletest/googletest/src/gtest-all.cc
+  third_party/googletest/googlemock/src/gmock-all.cc
+)
+
+
+target_include_directories(resolver_component_tests_runner_invoker_unsecure
+  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
+  PRIVATE third_party/googletest/googletest/include
+  PRIVATE third_party/googletest/googletest
+  PRIVATE third_party/googletest/googlemock/include
+  PRIVATE third_party/googletest/googlemock
+  PRIVATE ${_gRPC_PROTO_GENS_DIR}
+)
+
+target_link_libraries(resolver_component_tests_runner_invoker_unsecure
+  ${_gRPC_PROTOBUF_LIBRARIES}
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+  grpc++_test_util
+  grpc_test_util
+  gpr_test_util
+  grpc++
+  grpc
+  gpr
+  grpc++_test_config
+  ${_gRPC_GFLAGS_LIBRARIES}
+)
+
+endif()
+endif (gRPC_BUILD_TESTS)
+if (gRPC_BUILD_TESTS)
+if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
+
+add_executable(resolver_component_tests_runner_invoker
+  test/cpp/naming/resolver_component_tests_runner_invoker.cc
+  third_party/googletest/googletest/src/gtest-all.cc
+  third_party/googletest/googlemock/src/gmock-all.cc
+)
+
+
+target_include_directories(resolver_component_tests_runner_invoker
+  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
+  PRIVATE third_party/googletest/googletest/include
+  PRIVATE third_party/googletest/googletest
+  PRIVATE third_party/googletest/googlemock/include
+  PRIVATE third_party/googletest/googlemock
+  PRIVATE ${_gRPC_PROTO_GENS_DIR}
+)
+
+target_link_libraries(resolver_component_tests_runner_invoker
+  ${_gRPC_PROTOBUF_LIBRARIES}
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+  grpc++_test_util
+  grpc_test_util
+  gpr_test_util
+  grpc++
+  grpc
+  gpr
+  grpc++_test_config
+  ${_gRPC_GFLAGS_LIBRARIES}
+)
+
+endif()
+endif (gRPC_BUILD_TESTS)
+if (gRPC_BUILD_TESTS)
 
 add_executable(api_fuzzer_one_entry
   test/core/end2end/fuzzers/api_fuzzer.c
diff --git a/Makefile b/Makefile
index 1f93309d8f..ec1786a583 100644
--- a/Makefile
+++ b/Makefile
@@ -1266,6 +1266,10 @@ h2_sockpair+trace_nosec_test: $(BINDIR)/$(CONFIG)/h2_sockpair+trace_nosec_test
 h2_sockpair_1byte_nosec_test: $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_nosec_test
 h2_uds_nosec_test: $(BINDIR)/$(CONFIG)/h2_uds_nosec_test
 inproc_nosec_test: $(BINDIR)/$(CONFIG)/inproc_nosec_test
+resolver_component_test_unsecure: $(BINDIR)/$(CONFIG)/resolver_component_test_unsecure
+resolver_component_test: $(BINDIR)/$(CONFIG)/resolver_component_test
+resolver_component_tests_runner_invoker_unsecure: $(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker_unsecure
+resolver_component_tests_runner_invoker: $(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker
 api_fuzzer_one_entry: $(BINDIR)/$(CONFIG)/api_fuzzer_one_entry
 client_fuzzer_one_entry: $(BINDIR)/$(CONFIG)/client_fuzzer_one_entry
 hpack_parser_fuzzer_test_one_entry: $(BINDIR)/$(CONFIG)/hpack_parser_fuzzer_test_one_entry
@@ -1652,6 +1656,10 @@ buildtests_cxx: privatelibs_cxx \
   $(BINDIR)/$(CONFIG)/boringssl_x509_test \
   $(BINDIR)/$(CONFIG)/boringssl_tab_test \
   $(BINDIR)/$(CONFIG)/boringssl_v3name_test \
+  $(BINDIR)/$(CONFIG)/resolver_component_test_unsecure \
+  $(BINDIR)/$(CONFIG)/resolver_component_test \
+  $(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker_unsecure \
+  $(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker \
 
 else
 buildtests_cxx: privatelibs_cxx \
@@ -1730,6 +1738,10 @@ buildtests_cxx: privatelibs_cxx \
   $(BINDIR)/$(CONFIG)/thread_manager_test \
   $(BINDIR)/$(CONFIG)/thread_stress_test \
   $(BINDIR)/$(CONFIG)/writes_per_rpc_test \
+  $(BINDIR)/$(CONFIG)/resolver_component_test_unsecure \
+  $(BINDIR)/$(CONFIG)/resolver_component_test \
+  $(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker_unsecure \
+  $(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker \
 
 endif
 
@@ -2141,6 +2153,10 @@ test_cxx: buildtests_cxx
 	$(Q) $(BINDIR)/$(CONFIG)/thread_stress_test || ( echo test thread_stress_test failed ; exit 1 )
 	$(E) "[RUN]     Testing writes_per_rpc_test"
 	$(Q) $(BINDIR)/$(CONFIG)/writes_per_rpc_test || ( echo test writes_per_rpc_test failed ; exit 1 )
+	$(E) "[RUN]     Testing resolver_component_tests_runner_invoker_unsecure"
+	$(Q) $(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker_unsecure || ( echo test resolver_component_tests_runner_invoker_unsecure failed ; exit 1 )
+	$(E) "[RUN]     Testing resolver_component_tests_runner_invoker"
+	$(Q) $(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker || ( echo test resolver_component_tests_runner_invoker failed ; exit 1 )
 
 
 flaky_test_cxx: buildtests_cxx
@@ -2941,6 +2957,8 @@ LIBGRPC_SRC = \
     src/core/lib/compression/compression_internal.c \
     src/core/lib/compression/message_compress.c \
     src/core/lib/compression/stream_compression.c \
+    src/core/lib/compression/stream_compression_gzip.c \
+    src/core/lib/compression/stream_compression_identity.c \
     src/core/lib/debug/stats.c \
     src/core/lib/debug/stats_data.c \
     src/core/lib/http/format_request.c \
@@ -3191,6 +3209,7 @@ LIBGRPC_SRC = \
     src/core/plugin_registry/grpc_plugin_registry.c \
 
 PUBLIC_HEADERS_C += \
+    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -3290,6 +3309,8 @@ LIBGRPC_CRONET_SRC = \
     src/core/lib/compression/compression_internal.c \
     src/core/lib/compression/message_compress.c \
     src/core/lib/compression/stream_compression.c \
+    src/core/lib/compression/stream_compression_gzip.c \
+    src/core/lib/compression/stream_compression_identity.c \
     src/core/lib/debug/stats.c \
     src/core/lib/debug/stats_data.c \
     src/core/lib/http/format_request.c \
@@ -3498,6 +3519,7 @@ LIBGRPC_CRONET_SRC = \
     src/core/plugin_registry/grpc_cronet_plugin_registry.c \
 
 PUBLIC_HEADERS_C += \
+    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -3606,6 +3628,8 @@ LIBGRPC_TEST_UTIL_SRC = \
     src/core/lib/compression/compression_internal.c \
     src/core/lib/compression/message_compress.c \
     src/core/lib/compression/stream_compression.c \
+    src/core/lib/compression/stream_compression_gzip.c \
+    src/core/lib/compression/stream_compression_identity.c \
     src/core/lib/debug/stats.c \
     src/core/lib/debug/stats_data.c \
     src/core/lib/http/format_request.c \
@@ -3776,6 +3800,7 @@ LIBGRPC_TEST_UTIL_SRC = \
     src/core/ext/filters/http/server/http_server_filter.c \
 
 PUBLIC_HEADERS_C += \
+    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -3858,6 +3883,8 @@ LIBGRPC_TEST_UTIL_UNSECURE_SRC = \
     src/core/lib/compression/compression_internal.c \
     src/core/lib/compression/message_compress.c \
     src/core/lib/compression/stream_compression.c \
+    src/core/lib/compression/stream_compression_gzip.c \
+    src/core/lib/compression/stream_compression_identity.c \
     src/core/lib/debug/stats.c \
     src/core/lib/debug/stats_data.c \
     src/core/lib/http/format_request.c \
@@ -4028,6 +4055,7 @@ LIBGRPC_TEST_UTIL_UNSECURE_SRC = \
     src/core/ext/filters/http/server/http_server_filter.c \
 
 PUBLIC_HEADERS_C += \
+    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -4083,6 +4111,8 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/lib/compression/compression_internal.c \
     src/core/lib/compression/message_compress.c \
     src/core/lib/compression/stream_compression.c \
+    src/core/lib/compression/stream_compression_gzip.c \
+    src/core/lib/compression/stream_compression_identity.c \
     src/core/lib/debug/stats.c \
     src/core/lib/debug/stats_data.c \
     src/core/lib/http/format_request.c \
@@ -4301,6 +4331,7 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/plugin_registry/grpc_unsecure_plugin_registry.c \
 
 PUBLIC_HEADERS_C += \
+    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -4589,6 +4620,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/slice_buffer.h \
     include/grpc/status.h \
     include/grpc/support/workaround_list.h \
+    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -4599,6 +4631,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/impl/codegen/status.h \
     include/grpc++/impl/codegen/async_stream.h \
     include/grpc++/impl/codegen/async_unary_call.h \
+    include/grpc++/impl/codegen/byte_buffer.h \
     include/grpc++/impl/codegen/call.h \
     include/grpc++/impl/codegen/call_hook.h \
     include/grpc++/impl/codegen/channel_interface.h \
@@ -4819,6 +4852,8 @@ LIBGRPC++_CRONET_SRC = \
     src/core/lib/compression/compression_internal.c \
     src/core/lib/compression/message_compress.c \
     src/core/lib/compression/stream_compression.c \
+    src/core/lib/compression/stream_compression_gzip.c \
+    src/core/lib/compression/stream_compression_identity.c \
     src/core/lib/debug/stats.c \
     src/core/lib/debug/stats_data.c \
     src/core/lib/http/format_request.c \
@@ -5083,6 +5118,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/slice_buffer.h \
     include/grpc/status.h \
     include/grpc/support/workaround_list.h \
+    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -5093,6 +5129,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/impl/codegen/status.h \
     include/grpc++/impl/codegen/async_stream.h \
     include/grpc++/impl/codegen/async_unary_call.h \
+    include/grpc++/impl/codegen/byte_buffer.h \
     include/grpc++/impl/codegen/call.h \
     include/grpc++/impl/codegen/call_hook.h \
     include/grpc++/impl/codegen/channel_interface.h \
@@ -5446,6 +5483,7 @@ LIBGRPC++_TEST_UTIL_SRC = \
 PUBLIC_HEADERS_CXX += \
     include/grpc++/impl/codegen/async_stream.h \
     include/grpc++/impl/codegen/async_unary_call.h \
+    include/grpc++/impl/codegen/byte_buffer.h \
     include/grpc++/impl/codegen/call.h \
     include/grpc++/impl/codegen/call_hook.h \
     include/grpc++/impl/codegen/channel_interface.h \
@@ -5473,6 +5511,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/impl/codegen/stub_options.h \
     include/grpc++/impl/codegen/sync_stream.h \
     include/grpc++/impl/codegen/time.h \
+    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -5561,6 +5600,7 @@ LIBGRPC++_TEST_UTIL_UNSECURE_SRC = \
 PUBLIC_HEADERS_CXX += \
     include/grpc++/impl/codegen/async_stream.h \
     include/grpc++/impl/codegen/async_unary_call.h \
+    include/grpc++/impl/codegen/byte_buffer.h \
     include/grpc++/impl/codegen/call.h \
     include/grpc++/impl/codegen/call_hook.h \
     include/grpc++/impl/codegen/channel_interface.h \
@@ -5588,6 +5628,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/impl/codegen/stub_options.h \
     include/grpc++/impl/codegen/sync_stream.h \
     include/grpc++/impl/codegen/time.h \
+    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -5795,6 +5836,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/slice_buffer.h \
     include/grpc/status.h \
     include/grpc/support/workaround_list.h \
+    include/grpc/impl/codegen/byte_buffer.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -5805,6 +5847,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/impl/codegen/status.h \
     include/grpc++/impl/codegen/async_stream.h \
     include/grpc++/impl/codegen/async_unary_call.h \
+    include/grpc++/impl/codegen/byte_buffer.h \
     include/grpc++/impl/codegen/call.h \
     include/grpc++/impl/codegen/call_hook.h \
     include/grpc++/impl/codegen/channel_interface.h \
@@ -19486,6 +19529,178 @@ ifneq ($(NO_DEPS),true)
 endif
 
 
+RESOLVER_COMPONENT_TEST_UNSECURE_SRC = \
+    test/cpp/naming/resolver_component_test.cc \
+
+RESOLVER_COMPONENT_TEST_UNSECURE_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(RESOLVER_COMPONENT_TEST_UNSECURE_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/resolver_component_test_unsecure: openssl_dep_error
+
+else
+
+
+
+
+ifeq ($(NO_PROTOBUF),true)
+
+# You can't build the protoc plugins or protobuf-enabled targets if you don't have protobuf 3.0.0+.
+
+$(BINDIR)/$(CONFIG)/resolver_component_test_unsecure: protobuf_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/resolver_component_test_unsecure: $(PROTOBUF_DEP) $(RESOLVER_COMPONENT_TEST_UNSECURE_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LDXX) $(LDFLAGS) $(RESOLVER_COMPONENT_TEST_UNSECURE_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) $(GTEST_LIB) -o $(BINDIR)/$(CONFIG)/resolver_component_test_unsecure
+
+endif
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/cpp/naming/resolver_component_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc++_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a
+
+deps_resolver_component_test_unsecure: $(RESOLVER_COMPONENT_TEST_UNSECURE_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(RESOLVER_COMPONENT_TEST_UNSECURE_OBJS:.o=.dep)
+endif
+endif
+
+
+RESOLVER_COMPONENT_TEST_SRC = \
+    test/cpp/naming/resolver_component_test.cc \
+
+RESOLVER_COMPONENT_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(RESOLVER_COMPONENT_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/resolver_component_test: openssl_dep_error
+
+else
+
+
+
+
+ifeq ($(NO_PROTOBUF),true)
+
+# You can't build the protoc plugins or protobuf-enabled targets if you don't have protobuf 3.0.0+.
+
+$(BINDIR)/$(CONFIG)/resolver_component_test: protobuf_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/resolver_component_test: $(PROTOBUF_DEP) $(RESOLVER_COMPONENT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LDXX) $(LDFLAGS) $(RESOLVER_COMPONENT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) $(GTEST_LIB) -o $(BINDIR)/$(CONFIG)/resolver_component_test
+
+endif
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/cpp/naming/resolver_component_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a
+
+deps_resolver_component_test: $(RESOLVER_COMPONENT_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(RESOLVER_COMPONENT_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
+RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_UNSECURE_SRC = \
+    test/cpp/naming/resolver_component_tests_runner_invoker.cc \
+
+RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_UNSECURE_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_UNSECURE_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker_unsecure: openssl_dep_error
+
+else
+
+
+
+
+ifeq ($(NO_PROTOBUF),true)
+
+# You can't build the protoc plugins or protobuf-enabled targets if you don't have protobuf 3.0.0+.
+
+$(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker_unsecure: protobuf_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker_unsecure: $(PROTOBUF_DEP) $(RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_UNSECURE_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LDXX) $(LDFLAGS) $(RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_UNSECURE_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) $(GTEST_LIB) -o $(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker_unsecure
+
+endif
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/cpp/naming/resolver_component_tests_runner_invoker.o:  $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a
+
+deps_resolver_component_tests_runner_invoker_unsecure: $(RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_UNSECURE_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_UNSECURE_OBJS:.o=.dep)
+endif
+endif
+
+
+RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_SRC = \
+    test/cpp/naming/resolver_component_tests_runner_invoker.cc \
+
+RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker: openssl_dep_error
+
+else
+
+
+
+
+ifeq ($(NO_PROTOBUF),true)
+
+# You can't build the protoc plugins or protobuf-enabled targets if you don't have protobuf 3.0.0+.
+
+$(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker: protobuf_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker: $(PROTOBUF_DEP) $(RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LDXX) $(LDFLAGS) $(RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) $(GTEST_LIB) -o $(BINDIR)/$(CONFIG)/resolver_component_tests_runner_invoker
+
+endif
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/cpp/naming/resolver_component_tests_runner_invoker.o:  $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a
+
+deps_resolver_component_tests_runner_invoker: $(RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(RESOLVER_COMPONENT_TESTS_RUNNER_INVOKER_OBJS:.o=.dep)
+endif
+endif
+
+
 API_FUZZER_ONE_ENTRY_SRC = \
     test/core/end2end/fuzzers/api_fuzzer.c \
     test/core/util/one_corpus_entry_fuzzer.c \
diff --git a/bazel/generate_cc.bzl b/bazel/generate_cc.bzl
index 7fffb58218..f88ee2f56f 100644
--- a/bazel/generate_cc.bzl
+++ b/bazel/generate_cc.bzl
@@ -55,7 +55,7 @@ def generate_cc_impl(ctx):
       arguments = arguments,
   )
 
-  return struct(files=set(out_files))
+  return struct(files=depset(out_files))
 
 _generate_cc = rule(
     attrs = {
diff --git a/bazel/grpc_build_system.bzl b/bazel/grpc_build_system.bzl
index ba7ffcc9be..6cfed6b0e7 100644
--- a/bazel/grpc_build_system.bzl
+++ b/bazel/grpc_build_system.bzl
@@ -106,6 +106,22 @@ def grpc_sh_test(name, srcs, args = [], data = []):
     args = args,
     data = data)
 
+def grpc_sh_binary(name, srcs, data = []):
+  native.sh_test(
+    name = name,
+    srcs = srcs,
+    data = data)
+
+def grpc_py_binary(name, srcs, data = [], deps = []):
+  if name == "test_dns_server":
+    # TODO: allow running test_dns_server in oss bazel test suite
+    deps = []
+  native.py_binary(
+    name = name,
+    srcs = srcs,
+    data = data,
+    deps = deps)
+
 def grpc_package(name, visibility = "private", features = []):
   if visibility == "tests":
     visibility = ["//test:__subpackages__"]
diff --git a/binding.gyp b/binding.gyp
index d56d25e6ba..7cb65c1d6d 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -668,6 +668,8 @@
         'src/core/lib/compression/compression_internal.c',
         'src/core/lib/compression/message_compress.c',
         'src/core/lib/compression/stream_compression.c',
+        'src/core/lib/compression/stream_compression_gzip.c',
+        'src/core/lib/compression/stream_compression_identity.c',
         'src/core/lib/debug/stats.c',
         'src/core/lib/debug/stats_data.c',
         'src/core/lib/http/format_request.c',
diff --git a/build.yaml b/build.yaml
index ed899a22d6..2f3e0520e6 100644
--- a/build.yaml
+++ b/build.yaml
@@ -196,6 +196,8 @@ filegroups:
   - src/core/lib/compression/compression_internal.c
   - src/core/lib/compression/message_compress.c
   - src/core/lib/compression/stream_compression.c
+  - src/core/lib/compression/stream_compression_gzip.c
+  - src/core/lib/compression/stream_compression_identity.c
   - src/core/lib/debug/stats.c
   - src/core/lib/debug/stats_data.c
   - src/core/lib/http/format_request.c
@@ -348,6 +350,8 @@ filegroups:
   - src/core/lib/compression/compression_internal.h
   - src/core/lib/compression/message_compress.h
   - src/core/lib/compression/stream_compression.h
+  - src/core/lib/compression/stream_compression_gzip.h
+  - src/core/lib/compression/stream_compression_identity.h
   - src/core/lib/debug/stats.h
   - src/core/lib/debug/stats_data.h
   - src/core/lib/http/format_request.h
@@ -504,6 +508,7 @@ filegroups:
   - grpc_deadline_filter
 - name: grpc_codegen
   public_headers:
+  - include/grpc/impl/codegen/byte_buffer.h
   - include/grpc/impl/codegen/byte_buffer_reader.h
   - include/grpc/impl/codegen/compression_types.h
   - include/grpc/impl/codegen/connectivity_state.h
@@ -971,6 +976,7 @@ filegroups:
   public_headers:
   - include/grpc++/impl/codegen/async_stream.h
   - include/grpc++/impl/codegen/async_unary_call.h
+  - include/grpc++/impl/codegen/byte_buffer.h
   - include/grpc++/impl/codegen/call.h
   - include/grpc++/impl/codegen/call_hook.h
   - include/grpc++/impl/codegen/channel_interface.h
diff --git a/config.m4 b/config.m4
index 4e7b9e8ce7..cfbacc6021 100644
--- a/config.m4
+++ b/config.m4
@@ -12,7 +12,7 @@ if test "$PHP_GRPC" != "no"; then
   LIBS="-lpthread $LIBS"
 
   CFLAGS="-Wall -Werror -Wno-parentheses-equality -Wno-unused-value -std=c11"
-  CXXFLAGS="-std=c++11"
+  CXXFLAGS="-std=c++11 -fno-exceptions -fno-rtti"
   GRPC_SHARED_LIBADD="-lpthread $GRPC_SHARED_LIBADD"
   PHP_REQUIRE_CXX()
   PHP_ADD_LIBRARY(pthread)
@@ -97,6 +97,8 @@ if test "$PHP_GRPC" != "no"; then
     src/core/lib/compression/compression_internal.c \
     src/core/lib/compression/message_compress.c \
     src/core/lib/compression/stream_compression.c \
+    src/core/lib/compression/stream_compression_gzip.c \
+    src/core/lib/compression/stream_compression_identity.c \
     src/core/lib/debug/stats.c \
     src/core/lib/debug/stats_data.c \
     src/core/lib/http/format_request.c \
diff --git a/config.w32 b/config.w32
index 044459edc7..1253a888c9 100644
--- a/config.w32
+++ b/config.w32
@@ -74,6 +74,8 @@ if (PHP_GRPC != "no") {
     "src\\core\\lib\\compression\\compression_internal.c " +
     "src\\core\\lib\\compression\\message_compress.c " +
     "src\\core\\lib\\compression\\stream_compression.c " +
+    "src\\core\\lib\\compression\\stream_compression_gzip.c " +
+    "src\\core\\lib\\compression\\stream_compression_identity.c " +
     "src\\core\\lib\\debug\\stats.c " +
     "src\\core\\lib\\debug\\stats_data.c " +
     "src\\core\\lib\\http\\format_request.c " +
diff --git a/doc/c-style-guide.md b/doc/c-style-guide.md
index 369bd56a46..2cfa41dd9e 100644
--- a/doc/c-style-guide.md
+++ b/doc/c-style-guide.md
@@ -32,14 +32,14 @@ Header Files
   # endif
   ```
 - Header files should be self-contained and end in .h.
-- All header files should have a #define guard to prevent multiple inclusion.
+- All header files should have a `#define` guard to prevent multiple inclusion.
   To guarantee uniqueness they should be based on the file's path.
 
   For public headers: `include/grpc/grpc.h` → `GRPC_GRPC_H`
 
   For private headers:
-  `src/core/channel/channel_stack.h` →
-  `GRPC_INTERNAL_CORE_CHANNEL_CHANNEL_STACK_H`
+  `src/core/lib/channel/channel_stack.h` →
+  `GRPC_CORE_LIB_CHANNEL_CHANNEL_STACK_H`
 
 Variable Initialization
 -----------------------
@@ -72,8 +72,16 @@ Symbol Names
 
 - Non-static functions must be prefixed by `grpc_`
 - Static functions must *not* be prefixed by `grpc_`
+- Typenames of `struct`s , `union`s, and `enum`s must be prefixed by `grpc_` if
+  they are declared in a header file. They must not be prefixed by `grpc_` if
+  they are declared in a source file.
 - Enumeration values and `#define` names must be uppercase. All other values
   must be lowercase.
+- Enumeration values or `#define` names defined in a header file must be
+  prefixed with `GRPC_` (except for `#define` macros that are being used to
+  substitute functions; those should follow the general rules for
+  functions). Enumeration values or `#define`s defined in source files must not
+  be prefixed with `GRPC_`.
 - Multiple word identifiers use underscore as a delimiter, *never* camel
   case. E.g. `variable_name`.
 
diff --git a/doc/environment_variables.md b/doc/environment_variables.md
index b79cd97363..f90f1d5b10 100644
--- a/doc/environment_variables.md
+++ b/doc/environment_variables.md
@@ -50,6 +50,7 @@ some configuration as environment variables that can be set.
   - channel_stack_builder - traces information about channel stacks being built
   - executor - traces grpc's internal thread pool ('the executor')
   - http - traces state in the http2 transport engine
+  - http2_stream_state - traces all http2 stream state mutations.
   - http1 - traces HTTP/1.x operations performed by gRPC
   - inproc - traces the in-process transport
   - flowctl - traces http2 flow control
diff --git a/doc/service_config.md b/doc/service_config.md
index 99d985f3bf..0abbd7f324 100644
--- a/doc/service_config.md
+++ b/doc/service_config.md
@@ -24,10 +24,7 @@ The service config is a JSON string of the following form:
   // opposed to backend addresses), gRPC will use grpclb (see
   // https://github.com/grpc/grpc/blob/master/doc/load-balancing.md),
   // regardless of what LB policy is requested either here or via the
-  // client API.  However, if the resolver returns at least one backend
-  // address in addition to the balancer address(es), the client may fall
-  // back to the requested policy if it is unable to reach any of the
-  // grpclb load balancers.
+  // client API.
   'loadBalancingPolicy': string,
 
   // Per-method configuration.  Optional.
diff --git a/examples/cpp/helloworld/CMakeLists.txt b/examples/cpp/helloworld/CMakeLists.txt
index 8f098c91a6..71a8db4f24 100644
--- a/examples/cpp/helloworld/CMakeLists.txt
+++ b/examples/cpp/helloworld/CMakeLists.txt
@@ -2,7 +2,11 @@
 cmake_minimum_required(VERSION 2.8)

 

 # Project

-project(HelloWorld CXX)

+project(HelloWorld C CXX)

+

+if(NOT MSVC)

+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

+endif()

 

 # Protobuf

 set(protobuf_MODULE_COMPATIBLE TRUE)

diff --git a/examples/cpp/helloworld/greeter_async_client.cc b/examples/cpp/helloworld/greeter_async_client.cc
index 64da044ea6..ddf6c1aaf3 100644
--- a/examples/cpp/helloworld/greeter_async_client.cc
+++ b/examples/cpp/helloworld/greeter_async_client.cc
@@ -60,11 +60,15 @@ class GreeterClient {
     // Storage for the status of the RPC upon completion.
     Status status;
 
-    // stub_->AsyncSayHello() performs the RPC call, returning an instance we
-    // store in "rpc". Because we are using the asynchronous API, we need to
-    // hold on to the "rpc" instance in order to get updates on the ongoing RPC.
+    // stub_->PrepareAsyncSayHello() creates an RPC object, returning
+    // an instance to store in "call" but does not actually start the RPC
+    // Because we are using the asynchronous API, we need to hold on to
+    // the "call" instance in order to get updates on the ongoing RPC.
     std::unique_ptr<ClientAsyncResponseReader<HelloReply> > rpc(
-        stub_->AsyncSayHello(&context, request, &cq));
+        stub_->PrepareAsyncSayHello(&context, request, &cq));
+
+    // StartCall initiates the RPC call
+    rpc->StartCall();
 
     // Request that, upon completion of the RPC, "reply" be updated with the
     // server's response; "status" with the indication of whether the operation
diff --git a/examples/cpp/helloworld/greeter_async_client2.cc b/examples/cpp/helloworld/greeter_async_client2.cc
index 4192546bef..3154e84d85 100644
--- a/examples/cpp/helloworld/greeter_async_client2.cc
+++ b/examples/cpp/helloworld/greeter_async_client2.cc
@@ -49,11 +49,15 @@ class GreeterClient {
         // Call object to store rpc data
         AsyncClientCall* call = new AsyncClientCall;
 
-        // stub_->AsyncSayHello() performs the RPC call, returning an instance to
-        // store in "call". Because we are using the asynchronous API, we need to
-        // hold on to the "call" instance in order to get updates on the ongoing RPC.
-        call->response_reader = stub_->AsyncSayHello(&call->context, request, &cq_);
-
+        // stub_->PrepareAsyncSayHello() creates an RPC object, returning
+        // an instance to store in "call" but does not actually start the RPC
+        // Because we are using the asynchronous API, we need to hold on to
+        // the "call" instance in order to get updates on the ongoing RPC.
+        call->response_reader =
+            stub_->PrepareAsyncSayHello(&call->context, request, &cq_);
+
+        // StartCall initiates the RPC call
+        call->response_reader->StartCall();
 
         // Request that, upon completion of the RPC, "reply" be updated with the
         // server's response; "status" with the indication of whether the operation
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index e6663e0837..5b9c3a07df 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -141,6 +141,7 @@ Pod::Spec.new do |s|
                       'include/grpc/impl/codegen/sync_generic.h',
                       'include/grpc/impl/codegen/sync_posix.h',
                       'include/grpc/impl/codegen/sync_windows.h',
+                      'include/grpc/impl/codegen/byte_buffer.h',
                       'include/grpc/impl/codegen/byte_buffer_reader.h',
                       'include/grpc/impl/codegen/compression_types.h',
                       'include/grpc/impl/codegen/connectivity_state.h',
@@ -330,6 +331,8 @@ Pod::Spec.new do |s|
                       'src/core/lib/compression/compression_internal.h',
                       'src/core/lib/compression/message_compress.h',
                       'src/core/lib/compression/stream_compression.h',
+                      'src/core/lib/compression/stream_compression_gzip.h',
+                      'src/core/lib/compression/stream_compression_identity.h',
                       'src/core/lib/debug/stats.h',
                       'src/core/lib/debug/stats_data.h',
                       'src/core/lib/http/format_request.h',
@@ -480,6 +483,8 @@ Pod::Spec.new do |s|
                       'src/core/lib/compression/compression_internal.c',
                       'src/core/lib/compression/message_compress.c',
                       'src/core/lib/compression/stream_compression.c',
+                      'src/core/lib/compression/stream_compression_gzip.c',
+                      'src/core/lib/compression/stream_compression_identity.c',
                       'src/core/lib/debug/stats.c',
                       'src/core/lib/debug/stats_data.c',
                       'src/core/lib/http/format_request.c',
@@ -827,6 +832,8 @@ Pod::Spec.new do |s|
                               'src/core/lib/compression/compression_internal.h',
                               'src/core/lib/compression/message_compress.h',
                               'src/core/lib/compression/stream_compression.h',
+                              'src/core/lib/compression/stream_compression_gzip.h',
+                              'src/core/lib/compression/stream_compression_identity.h',
                               'src/core/lib/debug/stats.h',
                               'src/core/lib/debug/stats_data.h',
                               'src/core/lib/http/format_request.h',
diff --git a/grpc.def b/grpc.def
index 9451394f31..2a8d80243c 100644
--- a/grpc.def
+++ b/grpc.def
@@ -1,14 +1,4 @@
 EXPORTS
-    grpc_raw_byte_buffer_create
-    grpc_raw_compressed_byte_buffer_create
-    grpc_byte_buffer_copy
-    grpc_byte_buffer_length
-    grpc_byte_buffer_destroy
-    grpc_byte_buffer_reader_init
-    grpc_byte_buffer_reader_destroy
-    grpc_byte_buffer_reader_next
-    grpc_byte_buffer_reader_readall
-    grpc_raw_byte_buffer_from_reader
     census_initialize
     census_shutdown
     census_supported
@@ -37,6 +27,8 @@ EXPORTS
     census_delete_resource
     census_resource_id
     census_record_values
+    grpc_compression_algorithm_is_message
+    grpc_compression_algorithm_is_stream
     grpc_compression_algorithm_parse
     grpc_compression_algorithm_name
     grpc_compression_algorithm_for_level
@@ -142,6 +134,16 @@ EXPORTS
     grpc_server_add_secure_http2_port
     grpc_call_set_credentials
     grpc_server_credentials_set_auth_metadata_processor
+    grpc_raw_byte_buffer_create
+    grpc_raw_compressed_byte_buffer_create
+    grpc_byte_buffer_copy
+    grpc_byte_buffer_length
+    grpc_byte_buffer_destroy
+    grpc_byte_buffer_reader_init
+    grpc_byte_buffer_reader_destroy
+    grpc_byte_buffer_reader_next
+    grpc_byte_buffer_reader_readall
+    grpc_raw_byte_buffer_from_reader
     grpc_slice_ref
     grpc_slice_unref
     grpc_slice_copy
diff --git a/grpc.gemspec b/grpc.gemspec
index 998822849b..2bae208637 100644
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -29,6 +29,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency 'google-protobuf', '~> 3.1'
   s.add_dependency 'googleauth',      '~> 0.5.1'
+  s.add_dependency 'googleapis-common-protos-types', '~> 1.0.0'
 
   s.add_development_dependency 'bundler',            '~> 1.9'
   s.add_development_dependency 'facter',             '~> 2.4'
@@ -145,6 +146,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/support/tmpfile_posix.c )
   s.files += %w( src/core/lib/support/tmpfile_windows.c )
   s.files += %w( src/core/lib/support/wrap_memcpy.c )
+  s.files += %w( include/grpc/impl/codegen/byte_buffer.h )
   s.files += %w( include/grpc/impl/codegen/byte_buffer_reader.h )
   s.files += %w( include/grpc/impl/codegen/compression_types.h )
   s.files += %w( include/grpc/impl/codegen/connectivity_state.h )
@@ -262,6 +264,8 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/compression/compression_internal.h )
   s.files += %w( src/core/lib/compression/message_compress.h )
   s.files += %w( src/core/lib/compression/stream_compression.h )
+  s.files += %w( src/core/lib/compression/stream_compression_gzip.h )
+  s.files += %w( src/core/lib/compression/stream_compression_identity.h )
   s.files += %w( src/core/lib/debug/stats.h )
   s.files += %w( src/core/lib/debug/stats_data.h )
   s.files += %w( src/core/lib/http/format_request.h )
@@ -416,6 +420,8 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/compression/compression_internal.c )
   s.files += %w( src/core/lib/compression/message_compress.c )
   s.files += %w( src/core/lib/compression/stream_compression.c )
+  s.files += %w( src/core/lib/compression/stream_compression_gzip.c )
+  s.files += %w( src/core/lib/compression/stream_compression_identity.c )
   s.files += %w( src/core/lib/debug/stats.c )
   s.files += %w( src/core/lib/debug/stats_data.c )
   s.files += %w( src/core/lib/http/format_request.c )
diff --git a/grpc.gyp b/grpc.gyp
index 55bf722406..2cad4a7bbc 100644
--- a/grpc.gyp
+++ b/grpc.gyp
@@ -234,6 +234,8 @@
         'src/core/lib/compression/compression_internal.c',
         'src/core/lib/compression/message_compress.c',
         'src/core/lib/compression/stream_compression.c',
+        'src/core/lib/compression/stream_compression_gzip.c',
+        'src/core/lib/compression/stream_compression_identity.c',
         'src/core/lib/debug/stats.c',
         'src/core/lib/debug/stats_data.c',
         'src/core/lib/http/format_request.c',
@@ -534,6 +536,8 @@
         'src/core/lib/compression/compression_internal.c',
         'src/core/lib/compression/message_compress.c',
         'src/core/lib/compression/stream_compression.c',
+        'src/core/lib/compression/stream_compression_gzip.c',
+        'src/core/lib/compression/stream_compression_identity.c',
         'src/core/lib/debug/stats.c',
         'src/core/lib/debug/stats_data.c',
         'src/core/lib/http/format_request.c',
@@ -739,6 +743,8 @@
         'src/core/lib/compression/compression_internal.c',
         'src/core/lib/compression/message_compress.c',
         'src/core/lib/compression/stream_compression.c',
+        'src/core/lib/compression/stream_compression_gzip.c',
+        'src/core/lib/compression/stream_compression_identity.c',
         'src/core/lib/debug/stats.c',
         'src/core/lib/debug/stats_data.c',
         'src/core/lib/http/format_request.c',
@@ -929,6 +935,8 @@
         'src/core/lib/compression/compression_internal.c',
         'src/core/lib/compression/message_compress.c',
         'src/core/lib/compression/stream_compression.c',
+        'src/core/lib/compression/stream_compression_gzip.c',
+        'src/core/lib/compression/stream_compression_identity.c',
         'src/core/lib/debug/stats.c',
         'src/core/lib/debug/stats_data.c',
         'src/core/lib/http/format_request.c',
diff --git a/include/grpc++/generic/generic_stub.h b/include/grpc++/generic/generic_stub.h
index 7b269d0887..d5064318cf 100644
--- a/include/grpc++/generic/generic_stub.h
+++ b/include/grpc++/generic/generic_stub.h
@@ -20,6 +20,7 @@
 #define GRPCXX_GENERIC_GENERIC_STUB_H
 
 #include <grpc++/support/async_stream.h>
+#include <grpc++/support/async_unary_call.h>
 #include <grpc++/support/byte_buffer.h>
 
 namespace grpc {
@@ -27,6 +28,7 @@ namespace grpc {
 class CompletionQueue;
 typedef ClientAsyncReaderWriter<ByteBuffer, ByteBuffer>
     GenericClientAsyncReaderWriter;
+typedef ClientAsyncResponseReader<ByteBuffer> GenericClientAsyncResponseReader;
 
 /// Generic stubs provide a type-unsafe interface to call gRPC methods
 /// by name.
@@ -44,6 +46,21 @@ class GenericStub final {
       ClientContext* context, const grpc::string& method, CompletionQueue* cq,
       void* tag);
 
+  /// Setup a call to a named method \a method using \a context, but don't
+  /// start it. Let it be started explicitly with StartCall and a tag.
+  /// The return value only indicates whether or not registration of the call
+  /// succeeded (i.e. the call won't proceed if the return value is nullptr).
+  std::unique_ptr<GenericClientAsyncReaderWriter> PrepareCall(
+      ClientContext* context, const grpc::string& method, CompletionQueue* cq);
+
+  /// Setup a unary call to a named method \a method using \a context, and don't
+  /// start it. Let it be started explicitly with StartCall.
+  /// The return value only indicates whether or not registration of the call
+  /// succeeded (i.e. the call won't proceed if the return value is nullptr).
+  std::unique_ptr<GenericClientAsyncResponseReader> PrepareUnaryCall(
+      ClientContext* context, const grpc::string& method,
+      const ByteBuffer& request, CompletionQueue* cq);
+
  private:
   std::shared_ptr<ChannelInterface> channel_;
 };
diff --git a/include/grpc++/impl/codegen/async_stream.h b/include/grpc++/impl/codegen/async_stream.h
index 9cf7ac30dd..e60572fc93 100644
--- a/include/grpc++/impl/codegen/async_stream.h
+++ b/include/grpc++/impl/codegen/async_stream.h
@@ -35,6 +35,11 @@ class ClientAsyncStreamingInterface {
  public:
   virtual ~ClientAsyncStreamingInterface() {}
 
+  /// Start the call that was set up by the constructor, but only if the
+  /// constructor was invoked through the "Prepare" API which doesn't actually
+  /// start the call
+  virtual void StartCall(void* tag) = 0;
+
   /// Request notification of the reading of the initial metadata. Completion
   /// will be notified by \a tag on the associated completion queue.
   /// This call is optional, but if it is used, it cannot be used concurrently
@@ -156,20 +161,22 @@ class ClientAsyncReaderInterface : public ClientAsyncStreamingInterface,
 template <class R>
 class ClientAsyncReader final : public ClientAsyncReaderInterface<R> {
  public:
-  /// Create a stream and write the first request out.
+  /// Create a stream object.
+  /// Write the first request out if \a start is set.
   /// \a tag will be notified on \a cq when the call has been started and
-  /// \a request has been written out.
+  /// \a request has been written out. If \a start is not set, \a tag must be
+  /// nullptr and the actual call must be initiated by StartCall
   /// Note that \a context will be used to fill in custom initial metadata
   /// used to send to the server when starting the call.
   template <class W>
   static ClientAsyncReader* Create(ChannelInterface* channel,
                                    CompletionQueue* cq, const RpcMethod& method,
                                    ClientContext* context, const W& request,
-                                   void* tag) {
+                                   bool start, void* tag) {
     Call call = channel->CreateCall(method, context, cq);
     return new (g_core_codegen_interface->grpc_call_arena_alloc(
         call.call(), sizeof(ClientAsyncReader)))
-        ClientAsyncReader(call, context, request, tag);
+        ClientAsyncReader(call, context, request, start, tag);
   }
 
   // always allocated against a call arena, no memory free required
@@ -177,6 +184,12 @@ class ClientAsyncReader final : public ClientAsyncReaderInterface<R> {
     assert(size == sizeof(ClientAsyncReader));
   }
 
+  void StartCall(void* tag) override {
+    assert(!started_);
+    started_ = true;
+    StartCallInternal(tag);
+  }
+
   /// See the \a ClientAsyncStreamingInterface.ReadInitialMetadata
   /// method for semantics.
   ///
@@ -186,6 +199,7 @@ class ClientAsyncReader final : public ClientAsyncReaderInterface<R> {
   ///     calling code can access the received metadata through the
   ///     \a ClientContext.
   void ReadInitialMetadata(void* tag) override {
+    assert(started_);
     GPR_CODEGEN_ASSERT(!context_->initial_metadata_received_);
 
     meta_ops_.set_output_tag(tag);
@@ -194,6 +208,7 @@ class ClientAsyncReader final : public ClientAsyncReaderInterface<R> {
   }
 
   void Read(R* msg, void* tag) override {
+    assert(started_);
     read_ops_.set_output_tag(tag);
     if (!context_->initial_metadata_received_) {
       read_ops_.RecvInitialMetadata(context_);
@@ -208,6 +223,7 @@ class ClientAsyncReader final : public ClientAsyncReaderInterface<R> {
   ///   - the \a ClientContext associated with this call is updated with
   ///     possible initial and trailing metadata received from the server.
   void Finish(Status* status, void* tag) override {
+    assert(started_);
     finish_ops_.set_output_tag(tag);
     if (!context_->initial_metadata_received_) {
       finish_ops_.RecvInitialMetadata(context_);
@@ -219,19 +235,28 @@ class ClientAsyncReader final : public ClientAsyncReaderInterface<R> {
  private:
   template <class W>
   ClientAsyncReader(Call call, ClientContext* context, const W& request,
-                    void* tag)
-      : context_(context), call_(call) {
-    init_ops_.set_output_tag(tag);
-    init_ops_.SendInitialMetadata(context->send_initial_metadata_,
-                                  context->initial_metadata_flags());
+                    bool start, void* tag)
+      : context_(context), call_(call), started_(start) {
     // TODO(ctiller): don't assert
     GPR_CODEGEN_ASSERT(init_ops_.SendMessage(request).ok());
     init_ops_.ClientSendClose();
+    if (start) {
+      StartCallInternal(tag);
+    } else {
+      assert(tag == nullptr);
+    }
+  }
+
+  void StartCallInternal(void* tag) {
+    init_ops_.SendInitialMetadata(context_->send_initial_metadata_,
+                                  context_->initial_metadata_flags());
+    init_ops_.set_output_tag(tag);
     call_.PerformOps(&init_ops_);
   }
 
   ClientContext* context_;
   Call call_;
+  bool started_;
   CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage, CallOpClientSendClose>
       init_ops_;
   CallOpSet<CallOpRecvInitialMetadata> meta_ops_;
@@ -257,9 +282,12 @@ class ClientAsyncWriterInterface : public ClientAsyncStreamingInterface,
 template <class W>
 class ClientAsyncWriter final : public ClientAsyncWriterInterface<W> {
  public:
-  /// Create a stream and write the first request out.
+  /// Create a stream object.
+  /// Start the RPC if \a start is set
   /// \a tag will be notified on \a cq when the call has been started (i.e.
   /// intitial metadata sent) and \a request has been written out.
+  /// If \a start is not set, \a tag must be nullptr and the actual call
+  /// must be initiated by StartCall
   /// Note that \a context will be used to fill in custom initial metadata
   /// used to send to the server when starting the call.
   /// \a response will be filled in with the single expected response
@@ -269,11 +297,11 @@ class ClientAsyncWriter final : public ClientAsyncWriterInterface<W> {
   static ClientAsyncWriter* Create(ChannelInterface* channel,
                                    CompletionQueue* cq, const RpcMethod& method,
                                    ClientContext* context, R* response,
-                                   void* tag) {
+                                   bool start, void* tag) {
     Call call = channel->CreateCall(method, context, cq);
     return new (g_core_codegen_interface->grpc_call_arena_alloc(
         call.call(), sizeof(ClientAsyncWriter)))
-        ClientAsyncWriter(call, context, response, tag);
+        ClientAsyncWriter(call, context, response, start, tag);
   }
 
   // always allocated against a call arena, no memory free required
@@ -281,6 +309,12 @@ class ClientAsyncWriter final : public ClientAsyncWriterInterface<W> {
     assert(size == sizeof(ClientAsyncWriter));
   }
 
+  void StartCall(void* tag) override {
+    assert(!started_);
+    started_ = true;
+    StartCallInternal(tag);
+  }
+
   /// See the \a ClientAsyncStreamingInterface.ReadInitialMetadata method for
   /// semantics.
   ///
@@ -289,6 +323,7 @@ class ClientAsyncWriter final : public ClientAsyncWriterInterface<W> {
   ///     associated with this call is updated, and the calling code can access
   ///     the received metadata through the \a ClientContext.
   void ReadInitialMetadata(void* tag) override {
+    assert(started_);
     GPR_CODEGEN_ASSERT(!context_->initial_metadata_received_);
 
     meta_ops_.set_output_tag(tag);
@@ -297,6 +332,7 @@ class ClientAsyncWriter final : public ClientAsyncWriterInterface<W> {
   }
 
   void Write(const W& msg, void* tag) override {
+    assert(started_);
     write_ops_.set_output_tag(tag);
     // TODO(ctiller): don't assert
     GPR_CODEGEN_ASSERT(write_ops_.SendMessage(msg).ok());
@@ -304,6 +340,7 @@ class ClientAsyncWriter final : public ClientAsyncWriterInterface<W> {
   }
 
   void Write(const W& msg, WriteOptions options, void* tag) override {
+    assert(started_);
     write_ops_.set_output_tag(tag);
     if (options.is_last_message()) {
       options.set_buffer_hint();
@@ -315,6 +352,7 @@ class ClientAsyncWriter final : public ClientAsyncWriterInterface<W> {
   }
 
   void WritesDone(void* tag) override {
+    assert(started_);
     write_ops_.set_output_tag(tag);
     write_ops_.ClientSendClose();
     call_.PerformOps(&write_ops_);
@@ -328,6 +366,7 @@ class ClientAsyncWriter final : public ClientAsyncWriterInterface<W> {
   ///   - attempts to fill in the \a response parameter passed to this class's
   ///     constructor with the server's response message.
   void Finish(Status* status, void* tag) override {
+    assert(started_);
     finish_ops_.set_output_tag(tag);
     if (!context_->initial_metadata_received_) {
       finish_ops_.RecvInitialMetadata(context_);
@@ -338,25 +377,32 @@ class ClientAsyncWriter final : public ClientAsyncWriterInterface<W> {
 
  private:
   template <class R>
-  ClientAsyncWriter(Call call, ClientContext* context, R* response, void* tag)
-      : context_(context), call_(call) {
+  ClientAsyncWriter(Call call, ClientContext* context, R* response, bool start,
+                    void* tag)
+      : context_(context), call_(call), started_(start) {
     finish_ops_.RecvMessage(response);
     finish_ops_.AllowNoMessage();
-    // if corked bit is set in context, we buffer up the initial metadata to
-    // coalesce with later message to be sent. No op is performed.
-    if (context_->initial_metadata_corked_) {
-      write_ops_.SendInitialMetadata(context->send_initial_metadata_,
-                                     context->initial_metadata_flags());
+    if (start) {
+      StartCallInternal(tag);
     } else {
+      assert(tag == nullptr);
+    }
+  }
+
+  void StartCallInternal(void* tag) {
+    write_ops_.SendInitialMetadata(context_->send_initial_metadata_,
+                                   context_->initial_metadata_flags());
+    // if corked bit is set in context, we just keep the initial metadata
+    // buffered up to coalesce with later message send. No op is performed.
+    if (!context_->initial_metadata_corked_) {
       write_ops_.set_output_tag(tag);
-      write_ops_.SendInitialMetadata(context->send_initial_metadata_,
-                                     context->initial_metadata_flags());
       call_.PerformOps(&write_ops_);
     }
   }
 
   ClientContext* context_;
   Call call_;
+  bool started_;
   CallOpSet<CallOpRecvInitialMetadata> meta_ops_;
   CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage, CallOpClientSendClose>
       write_ops_;
@@ -388,20 +434,23 @@ template <class W, class R>
 class ClientAsyncReaderWriter final
     : public ClientAsyncReaderWriterInterface<W, R> {
  public:
-  /// Create a stream and write the first request out.
+  /// Create a stream object.
+  /// Start the RPC request if \a start is set.
   /// \a tag will be notified on \a cq when the call has been started (i.e.
-  /// intitial metadata sent).
+  /// intitial metadata sent). If \a start is not set, \a tag must be
+  /// nullptr and the actual call must be initiated by StartCall
   /// Note that \a context will be used to fill in custom initial metadata
   /// used to send to the server when starting the call.
   static ClientAsyncReaderWriter* Create(ChannelInterface* channel,
                                          CompletionQueue* cq,
                                          const RpcMethod& method,
-                                         ClientContext* context, void* tag) {
+                                         ClientContext* context, bool start,
+                                         void* tag) {
     Call call = channel->CreateCall(method, context, cq);
 
     return new (g_core_codegen_interface->grpc_call_arena_alloc(
         call.call(), sizeof(ClientAsyncReaderWriter)))
-        ClientAsyncReaderWriter(call, context, tag);
+        ClientAsyncReaderWriter(call, context, start, tag);
   }
 
   // always allocated against a call arena, no memory free required
@@ -409,6 +458,12 @@ class ClientAsyncReaderWriter final
     assert(size == sizeof(ClientAsyncReaderWriter));
   }
 
+  void StartCall(void* tag) override {
+    assert(!started_);
+    started_ = true;
+    StartCallInternal(tag);
+  }
+
   /// See the \a ClientAsyncStreamingInterface.ReadInitialMetadata method
   /// for semantics of this method.
   ///
@@ -417,6 +472,7 @@ class ClientAsyncReaderWriter final
   ///     is updated with it, and then the receiving initial metadata can
   ///     be accessed through this \a ClientContext.
   void ReadInitialMetadata(void* tag) override {
+    assert(started_);
     GPR_CODEGEN_ASSERT(!context_->initial_metadata_received_);
 
     meta_ops_.set_output_tag(tag);
@@ -425,6 +481,7 @@ class ClientAsyncReaderWriter final
   }
 
   void Read(R* msg, void* tag) override {
+    assert(started_);
     read_ops_.set_output_tag(tag);
     if (!context_->initial_metadata_received_) {
       read_ops_.RecvInitialMetadata(context_);
@@ -434,6 +491,7 @@ class ClientAsyncReaderWriter final
   }
 
   void Write(const W& msg, void* tag) override {
+    assert(started_);
     write_ops_.set_output_tag(tag);
     // TODO(ctiller): don't assert
     GPR_CODEGEN_ASSERT(write_ops_.SendMessage(msg).ok());
@@ -441,6 +499,7 @@ class ClientAsyncReaderWriter final
   }
 
   void Write(const W& msg, WriteOptions options, void* tag) override {
+    assert(started_);
     write_ops_.set_output_tag(tag);
     if (options.is_last_message()) {
       options.set_buffer_hint();
@@ -452,6 +511,7 @@ class ClientAsyncReaderWriter final
   }
 
   void WritesDone(void* tag) override {
+    assert(started_);
     write_ops_.set_output_tag(tag);
     write_ops_.ClientSendClose();
     call_.PerformOps(&write_ops_);
@@ -462,6 +522,7 @@ class ClientAsyncReaderWriter final
   ///   - the \a ClientContext associated with this call is updated with
   ///     possible initial and trailing metadata sent from the server.
   void Finish(Status* status, void* tag) override {
+    assert(started_);
     finish_ops_.set_output_tag(tag);
     if (!context_->initial_metadata_received_) {
       finish_ops_.RecvInitialMetadata(context_);
@@ -471,23 +532,30 @@ class ClientAsyncReaderWriter final
   }
 
  private:
-  ClientAsyncReaderWriter(Call call, ClientContext* context, void* tag)
-      : context_(context), call_(call) {
-    if (context_->initial_metadata_corked_) {
-      // if corked bit is set in context, we buffer up the initial metadata to
-      // coalesce with later message to be sent. No op is performed.
-      write_ops_.SendInitialMetadata(context->send_initial_metadata_,
-                                     context->initial_metadata_flags());
+  ClientAsyncReaderWriter(Call call, ClientContext* context, bool start,
+                          void* tag)
+      : context_(context), call_(call), started_(start) {
+    if (start) {
+      StartCallInternal(tag);
     } else {
+      assert(tag == nullptr);
+    }
+  }
+
+  void StartCallInternal(void* tag) {
+    write_ops_.SendInitialMetadata(context_->send_initial_metadata_,
+                                   context_->initial_metadata_flags());
+    // if corked bit is set in context, we just keep the initial metadata
+    // buffered up to coalesce with later message send. No op is performed.
+    if (!context_->initial_metadata_corked_) {
       write_ops_.set_output_tag(tag);
-      write_ops_.SendInitialMetadata(context->send_initial_metadata_,
-                                     context->initial_metadata_flags());
       call_.PerformOps(&write_ops_);
     }
   }
 
   ClientContext* context_;
   Call call_;
+  bool started_;
   CallOpSet<CallOpRecvInitialMetadata> meta_ops_;
   CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>> read_ops_;
   CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage, CallOpClientSendClose>
diff --git a/include/grpc++/impl/codegen/async_unary_call.h b/include/grpc++/impl/codegen/async_unary_call.h
index f0f909686b..e472f04f56 100644
--- a/include/grpc++/impl/codegen/async_unary_call.h
+++ b/include/grpc++/impl/codegen/async_unary_call.h
@@ -32,13 +32,18 @@ namespace grpc {
 class CompletionQueue;
 extern CoreCodegenInterface* g_core_codegen_interface;
 
-/// An interface relevant for async client side unary RPCS (which send
+/// An interface relevant for async client side unary RPCs (which send
 /// one request message to a server and receive one response message).
 template <class R>
 class ClientAsyncResponseReaderInterface {
  public:
   virtual ~ClientAsyncResponseReaderInterface() {}
 
+  /// Start the call that was set up by the constructor, but only if the
+  /// constructor was invoked through the "Prepare" API which doesn't actually
+  /// start the call
+  virtual void StartCall() = 0;
+
   /// Request notification of the reading of initial metadata. Completion
   /// will be notified by \a tag on the associated completion queue.
   /// This call is optional, but if it is used, it cannot be used concurrently
@@ -70,9 +75,10 @@ template <class R>
 class ClientAsyncResponseReader final
     : public ClientAsyncResponseReaderInterface<R> {
  public:
-  /// Start a call and write the request out.
+  /// Start a call and write the request out if \a start is set.
   /// \a tag will be notified on \a cq when the call has been started (i.e.
   /// intitial metadata sent) and \a request has been written out.
+  /// If \a start is not set, the actual call must be initiated by StartCall
   /// Note that \a context will be used to fill in custom initial metadata
   /// used to send to the server when starting the call.
   template <class W>
@@ -80,11 +86,11 @@ class ClientAsyncResponseReader final
                                            CompletionQueue* cq,
                                            const RpcMethod& method,
                                            ClientContext* context,
-                                           const W& request) {
+                                           const W& request, bool start) {
     Call call = channel->CreateCall(method, context, cq);
     return new (g_core_codegen_interface->grpc_call_arena_alloc(
         call.call(), sizeof(ClientAsyncResponseReader)))
-        ClientAsyncResponseReader(call, context, request);
+        ClientAsyncResponseReader(call, context, request, start);
   }
 
   // always allocated against a call arena, no memory free required
@@ -92,13 +98,20 @@ class ClientAsyncResponseReader final
     assert(size == sizeof(ClientAsyncResponseReader));
   }
 
+  void StartCall() override {
+    assert(!started_);
+    started_ = true;
+    StartCallInternal();
+  }
+
   /// See \a ClientAsyncResponseReaderInterface::ReadInitialMetadata for
   /// semantics.
   ///
   /// Side effect:
   ///   - the \a ClientContext associated with this call is updated with
   ///     possible initial and trailing metadata sent from the server.
-  void ReadInitialMetadata(void* tag) {
+  void ReadInitialMetadata(void* tag) override {
+    assert(started_);
     GPR_CODEGEN_ASSERT(!context_->initial_metadata_received_);
 
     meta_buf.set_output_tag(tag);
@@ -111,7 +124,8 @@ class ClientAsyncResponseReader final
   /// Side effect:
   ///   - the \a ClientContext associated with this call is updated with
   ///     possible initial and trailing metadata sent from the server.
-  void Finish(R* msg, Status* status, void* tag) {
+  void Finish(R* msg, Status* status, void* tag) override {
+    assert(started_);
     finish_buf.set_output_tag(tag);
     if (!context_->initial_metadata_received_) {
       finish_buf.RecvInitialMetadata(context_);
@@ -125,15 +139,22 @@ class ClientAsyncResponseReader final
  private:
   ClientContext* const context_;
   Call call_;
+  bool started_;
 
   template <class W>
-  ClientAsyncResponseReader(Call call, ClientContext* context, const W& request)
-      : context_(context), call_(call) {
-    init_buf.SendInitialMetadata(context->send_initial_metadata_,
-                                 context->initial_metadata_flags());
+  ClientAsyncResponseReader(Call call, ClientContext* context, const W& request,
+                            bool start)
+      : context_(context), call_(call), started_(start) {
+    // Bind the metadata at time of StartCallInternal but set up the rest here
     // TODO(ctiller): don't assert
     GPR_CODEGEN_ASSERT(init_buf.SendMessage(request).ok());
     init_buf.ClientSendClose();
+    if (start) StartCallInternal();
+  }
+
+  void StartCallInternal() {
+    init_buf.SendInitialMetadata(context_->send_initial_metadata_,
+                                 context_->initial_metadata_flags());
     call_.PerformOps(&init_buf);
   }
 
diff --git a/include/grpc++/impl/codegen/byte_buffer.h b/include/grpc++/impl/codegen/byte_buffer.h
new file mode 100644
index 0000000000..57d731be18
--- /dev/null
+++ b/include/grpc++/impl/codegen/byte_buffer.h
@@ -0,0 +1,156 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_BYTE_BUFFER_H
+#define GRPCXX_IMPL_CODEGEN_BYTE_BUFFER_H
+
+#include <grpc/impl/codegen/byte_buffer.h>
+
+#include <grpc++/impl/codegen/config.h>
+#include <grpc++/impl/codegen/core_codegen_interface.h>
+#include <grpc++/impl/codegen/serialization_traits.h>
+#include <grpc++/impl/codegen/slice.h>
+#include <grpc++/impl/codegen/status.h>
+
+#include <vector>
+
+namespace grpc {
+
+template <class R>
+class CallOpRecvMessage;
+class MethodHandler;
+template <class ServiceType, class RequestType, class ResponseType>
+class RpcMethodHandler;
+template <class ServiceType, class RequestType, class ResponseType>
+class ServerStreamingHandler;
+namespace CallOpGenericRecvMessageHelper {
+template <class R>
+class DeserializeFuncType;
+}  // namespace CallOpGenericRecvMessageHelper
+
+/// A sequence of bytes.
+class ByteBuffer final {
+ public:
+  /// Constuct an empty buffer.
+  ByteBuffer() : buffer_(nullptr) {}
+
+  /// Construct buffer from \a slices, of which there are \a nslices.
+  ByteBuffer(const Slice* slices, size_t nslices);
+
+  /// Constuct a byte buffer by referencing elements of existing buffer
+  /// \a buf. Wrapper of core function grpc_byte_buffer_copy
+  ByteBuffer(const ByteBuffer& buf);
+
+  ~ByteBuffer() {
+    if (buffer_) {
+      g_core_codegen_interface->grpc_byte_buffer_destroy(buffer_);
+    }
+  }
+
+  ByteBuffer& operator=(const ByteBuffer&);
+
+  /// Dump (read) the buffer contents into \a slices.
+  Status Dump(std::vector<Slice>* slices) const;
+
+  /// Remove all data.
+  void Clear() {
+    if (buffer_) {
+      g_core_codegen_interface->grpc_byte_buffer_destroy(buffer_);
+      buffer_ = nullptr;
+    }
+  }
+
+  /// Make a duplicate copy of the internals of this byte
+  /// buffer so that we have our own owned version of it.
+  /// bbuf.Duplicate(); is equivalent to bbuf=bbuf; but is actually readable
+  void Duplicate() {
+    buffer_ = g_core_codegen_interface->grpc_byte_buffer_copy(buffer_);
+  }
+
+  /// Forget underlying byte buffer without destroying
+  /// Use this only for un-owned byte buffers
+  void Release() { buffer_ = nullptr; }
+
+  /// Buffer size in bytes.
+  size_t Length() const;
+
+  /// Swap the state of *this and *other.
+  void Swap(ByteBuffer* other);
+
+  /// Is this ByteBuffer valid?
+  bool Valid() const { return (buffer_ != nullptr); }
+
+ private:
+  friend class SerializationTraits<ByteBuffer, void>;
+  friend class CallOpSendMessage;
+  template <class R>
+  friend class CallOpRecvMessage;
+  friend class CallOpGenericRecvMessage;
+  friend class MethodHandler;
+  template <class ServiceType, class RequestType, class ResponseType>
+  friend class RpcMethodHandler;
+  template <class ServiceType, class RequestType, class ResponseType>
+  friend class ServerStreamingHandler;
+  template <class R>
+  friend class CallOpGenericRecvMessageHelper::DeserializeFuncType;
+
+  grpc_byte_buffer* buffer_;
+
+  // takes ownership
+  void set_buffer(grpc_byte_buffer* buf) {
+    if (buffer_) {
+      Clear();
+    }
+    buffer_ = buf;
+  }
+
+  grpc_byte_buffer* c_buffer() { return buffer_; }
+  grpc_byte_buffer** c_buffer_ptr() { return &buffer_; }
+
+  class ByteBufferPointer {
+   public:
+    ByteBufferPointer(const ByteBuffer* b)
+        : bbuf_(const_cast<ByteBuffer*>(b)) {}
+    operator ByteBuffer*() { return bbuf_; }
+    operator grpc_byte_buffer*() { return bbuf_->buffer_; }
+    operator grpc_byte_buffer**() { return &bbuf_->buffer_; }
+
+   private:
+    ByteBuffer* bbuf_;
+  };
+  ByteBufferPointer bbuf_ptr() const { return ByteBufferPointer(this); }
+};
+
+template <>
+class SerializationTraits<ByteBuffer, void> {
+ public:
+  static Status Deserialize(ByteBuffer* byte_buffer, ByteBuffer* dest) {
+    dest->set_buffer(byte_buffer->buffer_);
+    return Status::OK;
+  }
+  static Status Serialize(const ByteBuffer& source, ByteBuffer* buffer,
+                          bool* own_buffer) {
+    *buffer = source;
+    *own_buffer = true;
+    return Status::OK;
+  }
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_BYTE_BUFFER_H
diff --git a/include/grpc++/impl/codegen/call.h b/include/grpc++/impl/codegen/call.h
index 74ed5cbfb9..d9988e51fc 100644
--- a/include/grpc++/impl/codegen/call.h
+++ b/include/grpc++/impl/codegen/call.h
@@ -25,6 +25,7 @@
 #include <map>
 #include <memory>
 
+#include <grpc++/impl/codegen/byte_buffer.h>
 #include <grpc++/impl/codegen/call_hook.h>
 #include <grpc++/impl/codegen/client_context.h>
 #include <grpc++/impl/codegen/completion_queue_tag.h>
@@ -39,8 +40,6 @@
 #include <grpc/impl/codegen/compression_types.h>
 #include <grpc/impl/codegen/grpc_types.h>
 
-struct grpc_byte_buffer;
-
 namespace grpc {
 
 class ByteBuffer;
@@ -281,7 +280,7 @@ class CallOpSendInitialMetadata {
 
 class CallOpSendMessage {
  public:
-  CallOpSendMessage() : send_buf_(nullptr) {}
+  CallOpSendMessage() : send_buf_() {}
 
   /// Send \a message using \a options for the write. The \a options are cleared
   /// after use.
@@ -294,33 +293,35 @@ class CallOpSendMessage {
 
  protected:
   void AddOp(grpc_op* ops, size_t* nops) {
-    if (send_buf_ == nullptr) return;
+    if (!send_buf_.Valid()) return;
     grpc_op* op = &ops[(*nops)++];
     op->op = GRPC_OP_SEND_MESSAGE;
     op->flags = write_options_.flags();
     op->reserved = NULL;
-    op->data.send_message.send_message = send_buf_;
+    op->data.send_message.send_message = send_buf_.c_buffer();
     // Flags are per-message: clear them after use.
     write_options_.Clear();
   }
-  void FinishOp(bool* status) {
-    g_core_codegen_interface->grpc_byte_buffer_destroy(send_buf_);
-    send_buf_ = nullptr;
-  }
+  void FinishOp(bool* status) { send_buf_.Clear(); }
 
  private:
-  grpc_byte_buffer* send_buf_;
+  ByteBuffer send_buf_;
   WriteOptions write_options_;
 };
 
+namespace internal {
+template <class T>
+T Example();
+}  // namespace internal
+
 template <class M>
 Status CallOpSendMessage::SendMessage(const M& message, WriteOptions options) {
   write_options_ = options;
   bool own_buf;
-  Status result =
-      SerializationTraits<M>::Serialize(message, &send_buf_, &own_buf);
+  Status result = SerializationTraits<M>::Serialize(
+      message, send_buf_.bbuf_ptr(), &own_buf);
   if (!own_buf) {
-    send_buf_ = g_core_codegen_interface->grpc_byte_buffer_copy(send_buf_);
+    send_buf_.Duplicate();
   }
   return result;
 }
@@ -352,18 +353,20 @@ class CallOpRecvMessage {
     op->op = GRPC_OP_RECV_MESSAGE;
     op->flags = 0;
     op->reserved = NULL;
-    op->data.recv_message.recv_message = &recv_buf_;
+    op->data.recv_message.recv_message = recv_buf_.c_buffer_ptr();
   }
 
   void FinishOp(bool* status) {
     if (message_ == nullptr) return;
-    if (recv_buf_) {
+    if (recv_buf_.Valid()) {
       if (*status) {
         got_message = *status =
-            SerializationTraits<R>::Deserialize(recv_buf_, message_).ok();
+            SerializationTraits<R>::Deserialize(recv_buf_.bbuf_ptr(), message_)
+                .ok();
+        recv_buf_.Release();
       } else {
         got_message = false;
-        g_core_codegen_interface->grpc_byte_buffer_destroy(recv_buf_);
+        recv_buf_.Clear();
       }
     } else {
       got_message = false;
@@ -376,14 +379,14 @@ class CallOpRecvMessage {
 
  private:
   R* message_;
-  grpc_byte_buffer* recv_buf_;
+  ByteBuffer recv_buf_;
   bool allow_not_getting_message_;
 };
 
 namespace CallOpGenericRecvMessageHelper {
 class DeserializeFunc {
  public:
-  virtual Status Deserialize(grpc_byte_buffer* buf) = 0;
+  virtual Status Deserialize(ByteBuffer* buf) = 0;
   virtual ~DeserializeFunc() {}
 };
 
@@ -391,8 +394,8 @@ template <class R>
 class DeserializeFuncType final : public DeserializeFunc {
  public:
   DeserializeFuncType(R* message) : message_(message) {}
-  Status Deserialize(grpc_byte_buffer* buf) override {
-    return SerializationTraits<R>::Deserialize(buf, message_);
+  Status Deserialize(ByteBuffer* buf) override {
+    return SerializationTraits<R>::Deserialize(buf->bbuf_ptr(), message_);
   }
 
   ~DeserializeFuncType() override {}
@@ -428,18 +431,19 @@ class CallOpGenericRecvMessage {
     op->op = GRPC_OP_RECV_MESSAGE;
     op->flags = 0;
     op->reserved = NULL;
-    op->data.recv_message.recv_message = &recv_buf_;
+    op->data.recv_message.recv_message = recv_buf_.c_buffer_ptr();
   }
 
   void FinishOp(bool* status) {
     if (!deserialize_) return;
-    if (recv_buf_) {
+    if (recv_buf_.Valid()) {
       if (*status) {
         got_message = true;
-        *status = deserialize_->Deserialize(recv_buf_).ok();
+        *status = deserialize_->Deserialize(&recv_buf_).ok();
+        recv_buf_.Release();
       } else {
         got_message = false;
-        g_core_codegen_interface->grpc_byte_buffer_destroy(recv_buf_);
+        recv_buf_.Clear();
       }
     } else {
       got_message = false;
@@ -452,7 +456,7 @@ class CallOpGenericRecvMessage {
 
  private:
   std::unique_ptr<CallOpGenericRecvMessageHelper::DeserializeFunc> deserialize_;
-  grpc_byte_buffer* recv_buf_;
+  ByteBuffer recv_buf_;
   bool allow_not_getting_message_;
 };
 
diff --git a/include/grpc++/impl/codegen/method_handler_impl.h b/include/grpc++/impl/codegen/method_handler_impl.h
index 15e24bdcdc..e14cb0e926 100644
--- a/include/grpc++/impl/codegen/method_handler_impl.h
+++ b/include/grpc++/impl/codegen/method_handler_impl.h
@@ -19,6 +19,7 @@
 #ifndef GRPCXX_IMPL_CODEGEN_METHOD_HANDLER_IMPL_H
 #define GRPCXX_IMPL_CODEGEN_METHOD_HANDLER_IMPL_H
 
+#include <grpc++/impl/codegen/byte_buffer.h>
 #include <grpc++/impl/codegen/core_codegen_interface.h>
 #include <grpc++/impl/codegen/rpc_service_method.h>
 #include <grpc++/impl/codegen/sync_stream.h>
@@ -37,8 +38,8 @@ class RpcMethodHandler : public MethodHandler {
 
   void RunHandler(const HandlerParameter& param) final {
     RequestType req;
-    Status status =
-        SerializationTraits<RequestType>::Deserialize(param.request, &req);
+    Status status = SerializationTraits<RequestType>::Deserialize(
+        param.request.bbuf_ptr(), &req);
     ResponseType rsp;
     if (status.ok()) {
       status = func_(service_, param.server_context, &req, &rsp);
@@ -123,8 +124,8 @@ class ServerStreamingHandler : public MethodHandler {
 
   void RunHandler(const HandlerParameter& param) final {
     RequestType req;
-    Status status =
-        SerializationTraits<RequestType>::Deserialize(param.request, &req);
+    Status status = SerializationTraits<RequestType>::Deserialize(
+        param.request.bbuf_ptr(), &req);
 
     if (status.ok()) {
       ServerWriter<ResponseType> writer(param.call, param.server_context);
diff --git a/include/grpc++/impl/codegen/rpc_service_method.h b/include/grpc++/impl/codegen/rpc_service_method.h
index 7165774172..d356012ad6 100644
--- a/include/grpc++/impl/codegen/rpc_service_method.h
+++ b/include/grpc++/impl/codegen/rpc_service_method.h
@@ -25,14 +25,11 @@
 #include <memory>
 #include <vector>
 
+#include <grpc++/impl/codegen/byte_buffer.h>
 #include <grpc++/impl/codegen/config.h>
 #include <grpc++/impl/codegen/rpc_method.h>
 #include <grpc++/impl/codegen/status.h>
 
-extern "C" {
-struct grpc_byte_buffer;
-}
-
 namespace grpc {
 class ServerContext;
 class StreamContextInterface;
@@ -43,11 +40,14 @@ class MethodHandler {
   virtual ~MethodHandler() {}
   struct HandlerParameter {
     HandlerParameter(Call* c, ServerContext* context, grpc_byte_buffer* req)
-        : call(c), server_context(context), request(req) {}
+        : call(c), server_context(context) {
+      request.set_buffer(req);
+    }
+    ~HandlerParameter() { request.Release(); }
     Call* call;
     ServerContext* server_context;
-    // Handler required to grpc_byte_buffer_destroy this
-    grpc_byte_buffer* request;
+    // Handler required to destroy these contents
+    ByteBuffer request;
   };
   virtual void RunHandler(const HandlerParameter& param) = 0;
 };
diff --git a/include/grpc++/impl/codegen/serialization_traits.h b/include/grpc++/impl/codegen/serialization_traits.h
index b72d474126..4d91739cc4 100644
--- a/include/grpc++/impl/codegen/serialization_traits.h
+++ b/include/grpc++/impl/codegen/serialization_traits.h
@@ -24,17 +24,26 @@ namespace grpc {
 /// Defines how to serialize and deserialize some type.
 ///
 /// Used for hooking different message serialization API's into GRPC.
-/// Each SerializationTraits implementation must provide the following
-/// functions:
-///   static Status Serialize(const Message& msg,
-///                           grpc_byte_buffer** buffer,
-///                           bool* own_buffer);
-///   static Status Deserialize(grpc_byte_buffer* buffer,
-///                             Message* msg,
-///                             int max_receive_message_size);
+/// Each SerializationTraits<Message> implementation must provide the
+/// following functions:
+/// 1.  static Status Serialize(const Message& msg,
+///                             ByteBuffer* buffer,
+///                             bool* own_buffer);
+///     OR
+///     static Status Serialize(const Message& msg,
+///                             grpc_byte_buffer** buffer,
+///                             bool* own_buffer);
+///     The former is preferred; the latter is deprecated
 ///
-/// Serialize is required to convert message to a grpc_byte_buffer, and
-/// to store a pointer to that byte buffer at *buffer. *own_buffer should
+/// 2.  static Status Deserialize(ByteBuffer* buffer,
+///                               Message* msg);
+///     OR
+///     static Status Deserialize(grpc_byte_buffer* buffer,
+///                               Message* msg);
+///     The former is preferred; the latter is deprecated
+///
+/// Serialize is required to convert message to a ByteBuffer, and
+/// return that byte buffer through *buffer. *own_buffer should
 /// be set to true if the caller owns said byte buffer, or false if
 /// ownership is retained elsewhere.
 ///
diff --git a/include/grpc++/impl/codegen/slice.h b/include/grpc++/impl/codegen/slice.h
index e682bdef6a..c185bf4fd0 100644
--- a/include/grpc++/impl/codegen/slice.h
+++ b/include/grpc++/impl/codegen/slice.h
@@ -19,11 +19,89 @@
 #ifndef GRPCXX_IMPL_CODEGEN_SLICE_H
 #define GRPCXX_IMPL_CODEGEN_SLICE_H
 
+#include <grpc++/impl/codegen/config.h>
 #include <grpc++/impl/codegen/core_codegen_interface.h>
 #include <grpc++/impl/codegen/string_ref.h>
 
+#include <grpc/impl/codegen/slice.h>
+
 namespace grpc {
 
+/// A wrapper around \a grpc_slice.
+///
+/// A slice represents a contiguous reference counted array of bytes.
+/// It is cheap to take references to a slice, and it is cheap to create a
+/// slice pointing to a subset of another slice.
+class Slice final {
+ public:
+  /// Construct an empty slice.
+  Slice();
+  /// Destructor - drops one reference.
+  ~Slice();
+
+  enum AddRef { ADD_REF };
+  /// Construct a slice from \a slice, adding a reference.
+  Slice(grpc_slice slice, AddRef);
+
+  enum StealRef { STEAL_REF };
+  /// Construct a slice from \a slice, stealing a reference.
+  Slice(grpc_slice slice, StealRef);
+
+  /// Allocate a slice of specified size
+  Slice(size_t len);
+
+  /// Construct a slice from a copied buffer
+  Slice(const void* buf, size_t len);
+
+  /// Construct a slice from a copied string
+  Slice(const grpc::string& str);
+
+  enum StaticSlice { STATIC_SLICE };
+
+  /// Construct a slice from a static buffer
+  Slice(const void* buf, size_t len, StaticSlice);
+
+  /// Copy constructor, adds a reference.
+  Slice(const Slice& other);
+
+  /// Assignment, reference count is unchanged.
+  Slice& operator=(Slice other) {
+    std::swap(slice_, other.slice_);
+    return *this;
+  }
+
+  /// Create a slice pointing at some data. Calls malloc to allocate a refcount
+  /// for the object, and arranges that destroy will be called with the
+  /// user data pointer passed in at destruction. Can be the same as buf or
+  /// different (e.g., if data is part of a larger structure that must be
+  /// destroyed when the data is no longer needed)
+  Slice(void* buf, size_t len, void (*destroy)(void*), void* user_data);
+
+  /// Specialization of above for common case where buf == user_data
+  Slice(void* buf, size_t len, void (*destroy)(void*))
+      : Slice(buf, len, destroy, buf) {}
+
+  /// Similar to the above but has a destroy that also takes slice length
+  Slice(void* buf, size_t len, void (*destroy)(void*, size_t));
+
+  /// Byte size.
+  size_t size() const { return GRPC_SLICE_LENGTH(slice_); }
+
+  /// Raw pointer to the beginning (first element) of the slice.
+  const uint8_t* begin() const { return GRPC_SLICE_START_PTR(slice_); }
+
+  /// Raw pointer to the end (one byte \em past the last element) of the slice.
+  const uint8_t* end() const { return GRPC_SLICE_END_PTR(slice_); }
+
+  /// Raw C slice. Caller needs to call grpc_slice_unref when done.
+  grpc_slice c_slice() const;
+
+ private:
+  friend class ByteBuffer;
+
+  grpc_slice slice_;
+};
+
 inline grpc::string_ref StringRefFromSlice(const grpc_slice* slice) {
   return grpc::string_ref(
       reinterpret_cast<const char*>(GRPC_SLICE_START_PTR(*slice)),
diff --git a/include/grpc++/server_builder.h b/include/grpc++/server_builder.h
index 21ae70d13a..bbf45b3e74 100644
--- a/include/grpc++/server_builder.h
+++ b/include/grpc++/server_builder.h
@@ -136,8 +136,10 @@ class ServerBuilder {
   /// It can be invoked multiple times.
   ///
   /// \param addr_uri The address to try to bind to the server in URI form. If
-  /// the scheme name is omitted, "dns:///" is assumed. Valid values include
-  /// dns:///localhost:1234, / 192.168.1.1:31416, dns:///[::1]:27182, etc.).
+  /// the scheme name is omitted, "dns:///" is assumed. To bind to any address,
+  /// please use IPv6 any, i.e., [::]:<port>, which also accepts IPv4
+  /// connections.  Valid values include dns:///localhost:1234, /
+  /// 192.168.1.1:31416, dns:///[::1]:27182, etc.).
   /// \params creds The credentials associated with the server.
   /// \param selected_port[out] If not `nullptr`, gets populated with the port
   /// number bound to the \a grpc::Server for the corresponding endpoint after
diff --git a/include/grpc++/support/byte_buffer.h b/include/grpc++/support/byte_buffer.h
index df16c6a75e..81fa3b0a18 100644
--- a/include/grpc++/support/byte_buffer.h
+++ b/include/grpc++/support/byte_buffer.h
@@ -19,6 +19,7 @@
 #ifndef GRPCXX_SUPPORT_BYTE_BUFFER_H
 #define GRPCXX_SUPPORT_BYTE_BUFFER_H
 
+#include <grpc++/impl/codegen/byte_buffer.h>
 #include <grpc++/impl/serialization_traits.h>
 #include <grpc++/support/config.h>
 #include <grpc++/support/slice.h>
@@ -27,71 +28,4 @@
 #include <grpc/grpc.h>
 #include <grpc/support/log.h>
 
-#include <vector>
-
-namespace grpc {
-
-/// A sequence of bytes.
-class ByteBuffer final {
- public:
-  /// Constuct an empty buffer.
-  ByteBuffer() : buffer_(nullptr) {}
-
-  /// Construct buffer from \a slices, of which there are \a nslices.
-  ByteBuffer(const Slice* slices, size_t nslices);
-
-  /// Constuct a byte buffer by referencing elements of existing buffer
-  /// \a buf. Wrapper of core function grpc_byte_buffer_copy
-  ByteBuffer(const ByteBuffer& buf);
-
-  ~ByteBuffer();
-
-  ByteBuffer& operator=(const ByteBuffer&);
-
-  /// Dump (read) the buffer contents into \a slices.
-  Status Dump(std::vector<Slice>* slices) const;
-
-  /// Remove all data.
-  void Clear();
-
-  /// Buffer size in bytes.
-  size_t Length() const;
-
-  /// Swap the state of *this and *other.
-  void Swap(ByteBuffer* other);
-
- private:
-  friend class SerializationTraits<ByteBuffer, void>;
-
-  // takes ownership
-  void set_buffer(grpc_byte_buffer* buf) {
-    if (buffer_) {
-      Clear();
-    }
-    buffer_ = buf;
-  }
-
-  // For \a SerializationTraits's usage.
-  grpc_byte_buffer* buffer() const { return buffer_; }
-
-  grpc_byte_buffer* buffer_;
-};
-
-template <>
-class SerializationTraits<ByteBuffer, void> {
- public:
-  static Status Deserialize(grpc_byte_buffer* byte_buffer, ByteBuffer* dest) {
-    dest->set_buffer(byte_buffer);
-    return Status::OK;
-  }
-  static Status Serialize(const ByteBuffer& source, grpc_byte_buffer** buffer,
-                          bool* own_buffer) {
-    *buffer = grpc_byte_buffer_copy(source.buffer());
-    *own_buffer = true;
-    return Status::OK;
-  }
-};
-
-}  // namespace grpc
-
 #endif  // GRPCXX_SUPPORT_BYTE_BUFFER_H
diff --git a/include/grpc++/support/slice.h b/include/grpc++/support/slice.h
index bbf97f280e..10db10d79c 100644
--- a/include/grpc++/support/slice.h
+++ b/include/grpc++/support/slice.h
@@ -19,86 +19,8 @@
 #ifndef GRPCXX_SUPPORT_SLICE_H
 #define GRPCXX_SUPPORT_SLICE_H
 
+#include <grpc++/impl/codegen/slice.h>
 #include <grpc++/support/config.h>
 #include <grpc/slice.h>
 
-namespace grpc {
-
-/// A wrapper around \a grpc_slice.
-///
-/// A slice represents a contiguous reference counted array of bytes.
-/// It is cheap to take references to a slice, and it is cheap to create a
-/// slice pointing to a subset of another slice.
-class Slice final {
- public:
-  /// Construct an empty slice.
-  Slice();
-  /// Destructor - drops one reference.
-  ~Slice();
-
-  enum AddRef { ADD_REF };
-  /// Construct a slice from \a slice, adding a reference.
-  Slice(grpc_slice slice, AddRef);
-
-  enum StealRef { STEAL_REF };
-  /// Construct a slice from \a slice, stealing a reference.
-  Slice(grpc_slice slice, StealRef);
-
-  /// Allocate a slice of specified size
-  Slice(size_t len);
-
-  /// Construct a slice from a copied buffer
-  Slice(const void* buf, size_t len);
-
-  /// Construct a slice from a copied string
-  Slice(const grpc::string& str);
-
-  enum StaticSlice { STATIC_SLICE };
-
-  /// Construct a slice from a static buffer
-  Slice(const void* buf, size_t len, StaticSlice);
-
-  /// Copy constructor, adds a reference.
-  Slice(const Slice& other);
-
-  /// Assignment, reference count is unchanged.
-  Slice& operator=(Slice other) {
-    std::swap(slice_, other.slice_);
-    return *this;
-  }
-
-  /// Create a slice pointing at some data. Calls malloc to allocate a refcount
-  /// for the object, and arranges that destroy will be called with the
-  /// user data pointer passed in at destruction. Can be the same as buf or
-  /// different (e.g., if data is part of a larger structure that must be
-  /// destroyed when the data is no longer needed)
-  Slice(void* buf, size_t len, void (*destroy)(void*), void* user_data);
-
-  /// Specialization of above for common case where buf == user_data
-  Slice(void* buf, size_t len, void (*destroy)(void*))
-      : Slice(buf, len, destroy, buf) {}
-
-  /// Similar to the above but has a destroy that also takes slice length
-  Slice(void* buf, size_t len, void (*destroy)(void*, size_t));
-
-  /// Byte size.
-  size_t size() const { return GRPC_SLICE_LENGTH(slice_); }
-
-  /// Raw pointer to the beginning (first element) of the slice.
-  const uint8_t* begin() const { return GRPC_SLICE_START_PTR(slice_); }
-
-  /// Raw pointer to the end (one byte \em past the last element) of the slice.
-  const uint8_t* end() const { return GRPC_SLICE_END_PTR(slice_); }
-
-  /// Raw C slice. Caller needs to call grpc_slice_unref when done.
-  grpc_slice c_slice() const { return grpc_slice_ref(slice_); }
-
- private:
-  friend class ByteBuffer;
-
-  grpc_slice slice_;
-};
-
-}  // namespace grpc
-
 #endif  // GRPCXX_SUPPORT_SLICE_H
diff --git a/include/grpc/byte_buffer.h b/include/grpc/byte_buffer.h
index 55e191da31..7669582af2 100644
--- a/include/grpc/byte_buffer.h
+++ b/include/grpc/byte_buffer.h
@@ -19,69 +19,7 @@
 #ifndef GRPC_BYTE_BUFFER_H
 #define GRPC_BYTE_BUFFER_H
 
-#include <grpc/impl/codegen/grpc_types.h>
+#include <grpc/impl/codegen/byte_buffer.h>
 #include <grpc/slice_buffer.h>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** Returns a RAW byte buffer instance over the given slices (up to \a nslices).
- *
- * Increases the reference count for all \a slices processed. The user is
- * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
-GRPCAPI grpc_byte_buffer *grpc_raw_byte_buffer_create(grpc_slice *slices,
-                                                      size_t nslices);
-
-/** Returns a *compressed* RAW byte buffer instance over the given slices (up to
- * \a nslices). The \a compression argument defines the compression algorithm
- * used to generate the data in \a slices.
- *
- * Increases the reference count for all \a slices processed. The user is
- * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
-GRPCAPI grpc_byte_buffer *grpc_raw_compressed_byte_buffer_create(
-    grpc_slice *slices, size_t nslices, grpc_compression_algorithm compression);
-
-/** Copies input byte buffer \a bb.
- *
- * Increases the reference count of all the source slices. The user is
- * responsible for calling grpc_byte_buffer_destroy over the returned copy. */
-GRPCAPI grpc_byte_buffer *grpc_byte_buffer_copy(grpc_byte_buffer *bb);
-
-/** Returns the size of the given byte buffer, in bytes. */
-GRPCAPI size_t grpc_byte_buffer_length(grpc_byte_buffer *bb);
-
-/** Destroys \a byte_buffer deallocating all its memory. */
-GRPCAPI void grpc_byte_buffer_destroy(grpc_byte_buffer *byte_buffer);
-
-/** Reader for byte buffers. Iterates over slices in the byte buffer */
-struct grpc_byte_buffer_reader;
-typedef struct grpc_byte_buffer_reader grpc_byte_buffer_reader;
-
-/** Initialize \a reader to read over \a buffer.
- * Returns 1 upon success, 0 otherwise. */
-GRPCAPI int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
-                                         grpc_byte_buffer *buffer);
-
-/** Cleanup and destroy \a reader */
-GRPCAPI void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader);
-
-/** Updates \a slice with the next piece of data from from \a reader and returns
- * 1. Returns 0 at the end of the stream. Caller is responsible for calling
- * grpc_slice_unref on the result. */
-GRPCAPI int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
-                                         grpc_slice *slice);
-
-/** Merge all data from \a reader into single slice */
-GRPCAPI grpc_slice
-grpc_byte_buffer_reader_readall(grpc_byte_buffer_reader *reader);
-
-/** Returns a RAW byte buffer instance from the output of \a reader. */
-GRPCAPI grpc_byte_buffer *grpc_raw_byte_buffer_from_reader(
-    grpc_byte_buffer_reader *reader);
-
-#ifdef __cplusplus
-}
-#endif
-
 #endif /* GRPC_BYTE_BUFFER_H */
diff --git a/include/grpc/compression.h b/include/grpc/compression.h
index 5d1b541037..8cc7778b0f 100644
--- a/include/grpc/compression.h
+++ b/include/grpc/compression.h
@@ -47,7 +47,7 @@ GRPCAPI int grpc_compression_algorithm_parse(
  * algorithm. Note that \a name is statically allocated and must *not* be freed.
  * Returns 1 upon success, 0 otherwise. */
 GRPCAPI int grpc_compression_algorithm_name(
-    grpc_compression_algorithm algorithm, char **name);
+    grpc_compression_algorithm algorithm, const char **name);
 
 /** Returns the compression algorithm corresponding to \a level for the
  * compression algorithms encoded in the \a accepted_encodings bitset.
diff --git a/include/grpc/impl/codegen/byte_buffer.h b/include/grpc/impl/codegen/byte_buffer.h
new file mode 100644
index 0000000000..fc33305713
--- /dev/null
+++ b/include/grpc/impl/codegen/byte_buffer.h
@@ -0,0 +1,86 @@
+/*
+ *
+ * Copyright 2015 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.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_BYTE_BUFFER_H
+#define GRPC_IMPL_CODEGEN_BYTE_BUFFER_H
+
+#include <grpc/impl/codegen/grpc_types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Returns a RAW byte buffer instance over the given slices (up to \a nslices).
+ *
+ * Increases the reference count for all \a slices processed. The user is
+ * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
+GRPCAPI grpc_byte_buffer *grpc_raw_byte_buffer_create(grpc_slice *slices,
+                                                      size_t nslices);
+
+/** Returns a *compressed* RAW byte buffer instance over the given slices (up to
+ * \a nslices). The \a compression argument defines the compression algorithm
+ * used to generate the data in \a slices.
+ *
+ * Increases the reference count for all \a slices processed. The user is
+ * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
+GRPCAPI grpc_byte_buffer *grpc_raw_compressed_byte_buffer_create(
+    grpc_slice *slices, size_t nslices, grpc_compression_algorithm compression);
+
+/** Copies input byte buffer \a bb.
+ *
+ * Increases the reference count of all the source slices. The user is
+ * responsible for calling grpc_byte_buffer_destroy over the returned copy. */
+GRPCAPI grpc_byte_buffer *grpc_byte_buffer_copy(grpc_byte_buffer *bb);
+
+/** Returns the size of the given byte buffer, in bytes. */
+GRPCAPI size_t grpc_byte_buffer_length(grpc_byte_buffer *bb);
+
+/** Destroys \a byte_buffer deallocating all its memory. */
+GRPCAPI void grpc_byte_buffer_destroy(grpc_byte_buffer *byte_buffer);
+
+/** Reader for byte buffers. Iterates over slices in the byte buffer */
+struct grpc_byte_buffer_reader;
+typedef struct grpc_byte_buffer_reader grpc_byte_buffer_reader;
+
+/** Initialize \a reader to read over \a buffer.
+ * Returns 1 upon success, 0 otherwise. */
+GRPCAPI int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
+                                         grpc_byte_buffer *buffer);
+
+/** Cleanup and destroy \a reader */
+GRPCAPI void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader);
+
+/** Updates \a slice with the next piece of data from from \a reader and returns
+ * 1. Returns 0 at the end of the stream. Caller is responsible for calling
+ * grpc_slice_unref on the result. */
+GRPCAPI int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
+                                         grpc_slice *slice);
+
+/** Merge all data from \a reader into single slice */
+GRPCAPI grpc_slice
+grpc_byte_buffer_reader_readall(grpc_byte_buffer_reader *reader);
+
+/** Returns a RAW byte buffer instance from the output of \a reader. */
+GRPCAPI grpc_byte_buffer *grpc_raw_byte_buffer_from_reader(
+    grpc_byte_buffer_reader *reader);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_BYTE_BUFFER_H */
diff --git a/include/grpc/impl/codegen/grpc_types.h b/include/grpc/impl/codegen/grpc_types.h
index fea982fad8..c4844f3fe2 100644
--- a/include/grpc/impl/codegen/grpc_types.h
+++ b/include/grpc/impl/codegen/grpc_types.h
@@ -188,9 +188,14 @@ typedef struct {
 #define GRPC_ARG_HTTP2_MAX_FRAME_SIZE "grpc.http2.max_frame_size"
 /** Should BDP probing be performed? */
 #define GRPC_ARG_HTTP2_BDP_PROBE "grpc.http2.bdp_probe"
-/** Minimum time (in milliseconds) between successive ping frames being sent */
-#define GRPC_ARG_HTTP2_MIN_TIME_BETWEEN_PINGS_MS \
+/** Minimum time between sending successive ping frames without receiving any
+    data frame, Int valued, milliseconds. */
+#define GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS \
   "grpc.http2.min_time_between_pings_ms"
+/** Minimum allowed time between receiving successive ping frames without
+    sending any data frame. Int valued, milliseconds */
+#define GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS \
+  "grpc.http2.min_ping_interval_without_data_ms"
 /** Channel arg to override the http2 :scheme header */
 #define GRPC_ARG_HTTP2_SCHEME "grpc.http2_scheme"
 /** How many pings can we send before needing to send a data frame or header
@@ -202,10 +207,6 @@ typedef struct {
     closing the transport? (0 indicates that the server can bear an infinite
     number of misbehaving pings) */
 #define GRPC_ARG_HTTP2_MAX_PING_STRIKES "grpc.http2.max_ping_strikes"
-/** Minimum allowed time between two pings without sending any data frame. Int
-    valued, seconds */
-#define GRPC_ARG_HTTP2_MIN_PING_INTERVAL_WITHOUT_DATA_MS \
-  "grpc.http2.min_ping_interval_without_data_ms"
 /** How much data are we willing to queue up per stream if
     GRPC_WRITE_BUFFER_HINT is set? This is an upper bound */
 #define GRPC_ARG_HTTP2_WRITE_BUFFER_SIZE "grpc.http2.write_buffer_size"
diff --git a/include/grpc/slice.h b/include/grpc/slice.h
index 9d2a9fbc81..3f3cff1408 100644
--- a/include/grpc/slice.h
+++ b/include/grpc/slice.h
@@ -65,11 +65,7 @@ GPRAPI grpc_slice grpc_slice_new_with_len(void *p, size_t len,
 GPRAPI grpc_slice grpc_slice_malloc(size_t length);
 GPRAPI grpc_slice grpc_slice_malloc_large(size_t length);
 
-#define GRPC_SLICE_MALLOC(len)                                    \
-  ((len) <= GRPC_SLICE_INLINED_SIZE                               \
-       ? (grpc_slice){.refcount = NULL,                           \
-                      .data.inlined = {.length = (uint8_t)(len)}} \
-       : grpc_slice_malloc_large((len)))
+#define GRPC_SLICE_MALLOC(len) grpc_slice_malloc(len)
 
 /** Intern a slice:
 
diff --git a/package.xml b/package.xml
index 4fef15a2cc..a26f162c35 100644
--- a/package.xml
+++ b/package.xml
@@ -10,7 +10,7 @@
   <email>grpc-packages@google.com</email>
   <active>yes</active>
  </lead>
- <date>2017-05-22</date>
+ <date>2017-08-24</date>
  <time>16:06:07</time>
  <version>
   <release>1.7.0dev</release>
@@ -25,6 +25,9 @@
 - Channel are now by default persistent #11878
 - Some bug fixes from 1.4 branch #12109, #12123
 - Fixed hang bug when fork() was used #11814
+- License changed to Apache 2.0
+- Added support for php_namespace option in codegen plugin #11886
+- Updated gRPC C Core library version 1.6
  </notes>
  <contents>
   <dir baseinstalldir="/" name="/">
@@ -155,6 +158,7 @@
     <file baseinstalldir="/" name="src/core/lib/support/tmpfile_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/support/tmpfile_windows.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/support/wrap_memcpy.c" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/byte_buffer.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/byte_buffer_reader.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/compression_types.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/connectivity_state.h" role="src" />
@@ -272,6 +276,8 @@
     <file baseinstalldir="/" name="src/core/lib/compression/compression_internal.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/compression/message_compress.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/compression/stream_compression.h" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/compression/stream_compression_gzip.h" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/compression/stream_compression_identity.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/debug/stats.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/debug/stats_data.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/http/format_request.h" role="src" />
@@ -426,6 +432,8 @@
     <file baseinstalldir="/" name="src/core/lib/compression/compression_internal.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/compression/message_compress.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/compression/stream_compression.c" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/compression/stream_compression_gzip.c" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/compression/stream_compression_identity.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/debug/stats.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/debug/stats_data.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/http/format_request.c" role="src" />
diff --git a/setup.py b/setup.py
index d3ea83488c..12882413ce 100644
--- a/setup.py
+++ b/setup.py
@@ -70,7 +70,7 @@ CLASSIFIERS = [
     'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: 3.6',
     'License :: OSI Approved :: Apache Software License',
-],
+]
 
 # Environment variable to determine whether or not the Cython extension should
 # *use* Cython or use the generated C files. Note that this requires the C files
diff --git a/src/compiler/OWNERS b/src/compiler/OWNERS
deleted file mode 100644
index 96b89fc60f..0000000000
--- a/src/compiler/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-@vjpai cpp_generator.cc
diff --git a/src/compiler/cpp_generator.cc b/src/compiler/cpp_generator.cc
index b09bf99677..c2db8eff71 100644
--- a/src/compiler/cpp_generator.cc
+++ b/src/compiler/cpp_generator.cc
@@ -165,25 +165,37 @@ void PrintHeaderClientMethodInterfaces(
   (*vars)["Request"] = method->input_type_name();
   (*vars)["Response"] = method->output_type_name();
 
+  struct {
+    grpc::string prefix;
+    grpc::string method_params;  // extra arguments to method
+    grpc::string raw_args;       // extra arguments to raw version of method
+  } async_prefixes[] = {{"Async", ", void* tag", ", tag"},
+                        {"PrepareAsync", "", ""}};
+
   if (is_public) {
     if (method->NoStreaming()) {
       printer->Print(
           *vars,
           "virtual ::grpc::Status $Method$(::grpc::ClientContext* context, "
           "const $Request$& request, $Response$* response) = 0;\n");
-      printer->Print(*vars,
-                     "std::unique_ptr< "
-                     "::grpc::ClientAsyncResponseReaderInterface< $Response$>> "
-                     "Async$Method$(::grpc::ClientContext* context, "
-                     "const $Request$& request, "
-                     "::grpc::CompletionQueue* cq) {\n");
-      printer->Indent();
-      printer->Print(*vars,
-                     "return std::unique_ptr< "
-                     "::grpc::ClientAsyncResponseReaderInterface< $Response$>>("
-                     "Async$Method$Raw(context, request, cq));\n");
-      printer->Outdent();
-      printer->Print("}\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        printer->Print(
+            *vars,
+            "std::unique_ptr< "
+            "::grpc::ClientAsyncResponseReaderInterface< $Response$>> "
+            "$AsyncPrefix$$Method$(::grpc::ClientContext* context, "
+            "const $Request$& request, "
+            "::grpc::CompletionQueue* cq) {\n");
+        printer->Indent();
+        printer->Print(
+            *vars,
+            "return std::unique_ptr< "
+            "::grpc::ClientAsyncResponseReaderInterface< $Response$>>("
+            "$AsyncPrefix$$Method$Raw(context, request, cq));\n");
+        printer->Outdent();
+        printer->Print("}\n");
+      }
     } else if (ClientOnlyStreaming(method)) {
       printer->Print(
           *vars,
@@ -197,19 +209,26 @@ void PrintHeaderClientMethodInterfaces(
           "($Method$Raw(context, response));\n");
       printer->Outdent();
       printer->Print("}\n");
-      printer->Print(
-          *vars,
-          "std::unique_ptr< ::grpc::ClientAsyncWriterInterface< $Request$>>"
-          " Async$Method$(::grpc::ClientContext* context, $Response$* "
-          "response, "
-          "::grpc::CompletionQueue* cq, void* tag) {\n");
-      printer->Indent();
-      printer->Print(*vars,
-                     "return std::unique_ptr< "
-                     "::grpc::ClientAsyncWriterInterface< $Request$>>("
-                     "Async$Method$Raw(context, response, cq, tag));\n");
-      printer->Outdent();
-      printer->Print("}\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+        (*vars)["AsyncRawArgs"] = async_prefix.raw_args;
+        printer->Print(
+            *vars,
+            "std::unique_ptr< ::grpc::ClientAsyncWriterInterface< $Request$>>"
+            " $AsyncPrefix$$Method$(::grpc::ClientContext* context, "
+            "$Response$* "
+            "response, "
+            "::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
+        printer->Indent();
+        printer->Print(*vars,
+                       "return std::unique_ptr< "
+                       "::grpc::ClientAsyncWriterInterface< $Request$>>("
+                       "$AsyncPrefix$$Method$Raw(context, response, "
+                       "cq$AsyncRawArgs$));\n");
+        printer->Outdent();
+        printer->Print("}\n");
+      }
     } else if (ServerOnlyStreaming(method)) {
       printer->Print(
           *vars,
@@ -223,19 +242,25 @@ void PrintHeaderClientMethodInterfaces(
           "($Method$Raw(context, request));\n");
       printer->Outdent();
       printer->Print("}\n");
-      printer->Print(
-          *vars,
-          "std::unique_ptr< ::grpc::ClientAsyncReaderInterface< $Response$>> "
-          "Async$Method$("
-          "::grpc::ClientContext* context, const $Request$& request, "
-          "::grpc::CompletionQueue* cq, void* tag) {\n");
-      printer->Indent();
-      printer->Print(*vars,
-                     "return std::unique_ptr< "
-                     "::grpc::ClientAsyncReaderInterface< $Response$>>("
-                     "Async$Method$Raw(context, request, cq, tag));\n");
-      printer->Outdent();
-      printer->Print("}\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+        (*vars)["AsyncRawArgs"] = async_prefix.raw_args;
+        printer->Print(
+            *vars,
+            "std::unique_ptr< ::grpc::ClientAsyncReaderInterface< $Response$>> "
+            "$AsyncPrefix$$Method$("
+            "::grpc::ClientContext* context, const $Request$& request, "
+            "::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
+        printer->Indent();
+        printer->Print(
+            *vars,
+            "return std::unique_ptr< "
+            "::grpc::ClientAsyncReaderInterface< $Response$>>("
+            "$AsyncPrefix$$Method$Raw(context, request, cq$AsyncRawArgs$));\n");
+        printer->Outdent();
+        printer->Print("}\n");
+      }
     } else if (method->BidiStreaming()) {
       printer->Print(*vars,
                      "std::unique_ptr< ::grpc::ClientReaderWriterInterface< "
@@ -249,61 +274,83 @@ void PrintHeaderClientMethodInterfaces(
           "$Method$Raw(context));\n");
       printer->Outdent();
       printer->Print("}\n");
-      printer->Print(
-          *vars,
-          "std::unique_ptr< "
-          "::grpc::ClientAsyncReaderWriterInterface< $Request$, $Response$>> "
-          "Async$Method$(::grpc::ClientContext* context, "
-          "::grpc::CompletionQueue* cq, void* tag) {\n");
-      printer->Indent();
-      printer->Print(
-          *vars,
-          "return std::unique_ptr< "
-          "::grpc::ClientAsyncReaderWriterInterface< $Request$, $Response$>>("
-          "Async$Method$Raw(context, cq, tag));\n");
-      printer->Outdent();
-      printer->Print("}\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+        (*vars)["AsyncRawArgs"] = async_prefix.raw_args;
+        printer->Print(
+            *vars,
+            "std::unique_ptr< "
+            "::grpc::ClientAsyncReaderWriterInterface< $Request$, $Response$>> "
+            "$AsyncPrefix$$Method$(::grpc::ClientContext* context, "
+            "::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
+        printer->Indent();
+        printer->Print(
+            *vars,
+            "return std::unique_ptr< "
+            "::grpc::ClientAsyncReaderWriterInterface< $Request$, $Response$>>("
+            "$AsyncPrefix$$Method$Raw(context, cq$AsyncRawArgs$));\n");
+        printer->Outdent();
+        printer->Print("}\n");
+      }
     }
   } else {
     if (method->NoStreaming()) {
-      printer->Print(
-          *vars,
-          "virtual ::grpc::ClientAsyncResponseReaderInterface< $Response$>* "
-          "Async$Method$Raw(::grpc::ClientContext* context, "
-          "const $Request$& request, "
-          "::grpc::CompletionQueue* cq) = 0;\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        printer->Print(
+            *vars,
+            "virtual ::grpc::ClientAsyncResponseReaderInterface< $Response$>* "
+            "$AsyncPrefix$$Method$Raw(::grpc::ClientContext* context, "
+            "const $Request$& request, "
+            "::grpc::CompletionQueue* cq) = 0;\n");
+      }
     } else if (ClientOnlyStreaming(method)) {
       printer->Print(
           *vars,
           "virtual ::grpc::ClientWriterInterface< $Request$>*"
           " $Method$Raw("
           "::grpc::ClientContext* context, $Response$* response) = 0;\n");
-      printer->Print(*vars,
-                     "virtual ::grpc::ClientAsyncWriterInterface< $Request$>*"
-                     " Async$Method$Raw(::grpc::ClientContext* context, "
-                     "$Response$* response, "
-                     "::grpc::CompletionQueue* cq, void* tag) = 0;\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+        printer->Print(
+            *vars,
+            "virtual ::grpc::ClientAsyncWriterInterface< $Request$>*"
+            " $AsyncPrefix$$Method$Raw(::grpc::ClientContext* context, "
+            "$Response$* response, "
+            "::grpc::CompletionQueue* cq$AsyncMethodParams$) = 0;\n");
+      }
     } else if (ServerOnlyStreaming(method)) {
       printer->Print(
           *vars,
           "virtual ::grpc::ClientReaderInterface< $Response$>* $Method$Raw("
           "::grpc::ClientContext* context, const $Request$& request) = 0;\n");
-      printer->Print(
-          *vars,
-          "virtual ::grpc::ClientAsyncReaderInterface< $Response$>* "
-          "Async$Method$Raw("
-          "::grpc::ClientContext* context, const $Request$& request, "
-          "::grpc::CompletionQueue* cq, void* tag) = 0;\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+        printer->Print(
+            *vars,
+            "virtual ::grpc::ClientAsyncReaderInterface< $Response$>* "
+            "$AsyncPrefix$$Method$Raw("
+            "::grpc::ClientContext* context, const $Request$& request, "
+            "::grpc::CompletionQueue* cq$AsyncMethodParams$) = 0;\n");
+      }
     } else if (method->BidiStreaming()) {
       printer->Print(*vars,
                      "virtual ::grpc::ClientReaderWriterInterface< $Request$, "
                      "$Response$>* "
                      "$Method$Raw(::grpc::ClientContext* context) = 0;\n");
-      printer->Print(*vars,
-                     "virtual ::grpc::ClientAsyncReaderWriterInterface< "
-                     "$Request$, $Response$>* "
-                     "Async$Method$Raw(::grpc::ClientContext* context, "
-                     "::grpc::CompletionQueue* cq, void* tag) = 0;\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+        printer->Print(
+            *vars,
+            "virtual ::grpc::ClientAsyncReaderWriterInterface< "
+            "$Request$, $Response$>* "
+            "$AsyncPrefix$$Method$Raw(::grpc::ClientContext* context, "
+            "::grpc::CompletionQueue* cq$AsyncMethodParams$) = 0;\n");
+      }
     }
   }
 }
@@ -315,25 +362,35 @@ void PrintHeaderClientMethod(grpc_generator::Printer *printer,
   (*vars)["Method"] = method->name();
   (*vars)["Request"] = method->input_type_name();
   (*vars)["Response"] = method->output_type_name();
+  struct {
+    grpc::string prefix;
+    grpc::string method_params;  // extra arguments to method
+    grpc::string raw_args;       // extra arguments to raw version of method
+  } async_prefixes[] = {{"Async", ", void* tag", ", tag"},
+                        {"PrepareAsync", "", ""}};
+
   if (is_public) {
     if (method->NoStreaming()) {
       printer->Print(
           *vars,
           "::grpc::Status $Method$(::grpc::ClientContext* context, "
           "const $Request$& request, $Response$* response) override;\n");
-      printer->Print(
-          *vars,
-          "std::unique_ptr< ::grpc::ClientAsyncResponseReader< $Response$>> "
-          "Async$Method$(::grpc::ClientContext* context, "
-          "const $Request$& request, "
-          "::grpc::CompletionQueue* cq) {\n");
-      printer->Indent();
-      printer->Print(*vars,
-                     "return std::unique_ptr< "
-                     "::grpc::ClientAsyncResponseReader< $Response$>>("
-                     "Async$Method$Raw(context, request, cq));\n");
-      printer->Outdent();
-      printer->Print("}\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        printer->Print(
+            *vars,
+            "std::unique_ptr< ::grpc::ClientAsyncResponseReader< $Response$>> "
+            "$AsyncPrefix$$Method$(::grpc::ClientContext* context, "
+            "const $Request$& request, "
+            "::grpc::CompletionQueue* cq) {\n");
+        printer->Indent();
+        printer->Print(*vars,
+                       "return std::unique_ptr< "
+                       "::grpc::ClientAsyncResponseReader< $Response$>>("
+                       "$AsyncPrefix$$Method$Raw(context, request, cq));\n");
+        printer->Outdent();
+        printer->Print("}\n");
+      }
     } else if (ClientOnlyStreaming(method)) {
       printer->Print(
           *vars,
@@ -346,18 +403,24 @@ void PrintHeaderClientMethod(grpc_generator::Printer *printer,
                      "($Method$Raw(context, response));\n");
       printer->Outdent();
       printer->Print("}\n");
-      printer->Print(*vars,
-                     "std::unique_ptr< ::grpc::ClientAsyncWriter< $Request$>>"
-                     " Async$Method$(::grpc::ClientContext* context, "
-                     "$Response$* response, "
-                     "::grpc::CompletionQueue* cq, void* tag) {\n");
-      printer->Indent();
-      printer->Print(
-          *vars,
-          "return std::unique_ptr< ::grpc::ClientAsyncWriter< $Request$>>("
-          "Async$Method$Raw(context, response, cq, tag));\n");
-      printer->Outdent();
-      printer->Print("}\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+        (*vars)["AsyncRawArgs"] = async_prefix.raw_args;
+        printer->Print(*vars,
+                       "std::unique_ptr< ::grpc::ClientAsyncWriter< $Request$>>"
+                       " $AsyncPrefix$$Method$(::grpc::ClientContext* context, "
+                       "$Response$* response, "
+                       "::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
+        printer->Indent();
+        printer->Print(
+            *vars,
+            "return std::unique_ptr< ::grpc::ClientAsyncWriter< $Request$>>("
+            "$AsyncPrefix$$Method$Raw(context, response, "
+            "cq$AsyncRawArgs$));\n");
+        printer->Outdent();
+        printer->Print("}\n");
+      }
     } else if (ServerOnlyStreaming(method)) {
       printer->Print(
           *vars,
@@ -371,19 +434,24 @@ void PrintHeaderClientMethod(grpc_generator::Printer *printer,
           "($Method$Raw(context, request));\n");
       printer->Outdent();
       printer->Print("}\n");
-      printer->Print(
-          *vars,
-          "std::unique_ptr< ::grpc::ClientAsyncReader< $Response$>> "
-          "Async$Method$("
-          "::grpc::ClientContext* context, const $Request$& request, "
-          "::grpc::CompletionQueue* cq, void* tag) {\n");
-      printer->Indent();
-      printer->Print(
-          *vars,
-          "return std::unique_ptr< ::grpc::ClientAsyncReader< $Response$>>("
-          "Async$Method$Raw(context, request, cq, tag));\n");
-      printer->Outdent();
-      printer->Print("}\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+        (*vars)["AsyncRawArgs"] = async_prefix.raw_args;
+        printer->Print(
+            *vars,
+            "std::unique_ptr< ::grpc::ClientAsyncReader< $Response$>> "
+            "$AsyncPrefix$$Method$("
+            "::grpc::ClientContext* context, const $Request$& request, "
+            "::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
+        printer->Indent();
+        printer->Print(
+            *vars,
+            "return std::unique_ptr< ::grpc::ClientAsyncReader< $Response$>>("
+            "$AsyncPrefix$$Method$Raw(context, request, cq$AsyncRawArgs$));\n");
+        printer->Outdent();
+        printer->Print("}\n");
+      }
     } else if (method->BidiStreaming()) {
       printer->Print(
           *vars,
@@ -396,53 +464,80 @@ void PrintHeaderClientMethod(grpc_generator::Printer *printer,
                      "$Method$Raw(context));\n");
       printer->Outdent();
       printer->Print("}\n");
-      printer->Print(*vars,
-                     "std::unique_ptr<  ::grpc::ClientAsyncReaderWriter< "
-                     "$Request$, $Response$>> "
-                     "Async$Method$(::grpc::ClientContext* context, "
-                     "::grpc::CompletionQueue* cq, void* tag) {\n");
-      printer->Indent();
-      printer->Print(*vars,
-                     "return std::unique_ptr< "
-                     "::grpc::ClientAsyncReaderWriter< $Request$, $Response$>>("
-                     "Async$Method$Raw(context, cq, tag));\n");
-      printer->Outdent();
-      printer->Print("}\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+        (*vars)["AsyncRawArgs"] = async_prefix.raw_args;
+        printer->Print(*vars,
+                       "std::unique_ptr<  ::grpc::ClientAsyncReaderWriter< "
+                       "$Request$, $Response$>> "
+                       "$AsyncPrefix$$Method$(::grpc::ClientContext* context, "
+                       "::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
+        printer->Indent();
+        printer->Print(
+            *vars,
+            "return std::unique_ptr< "
+            "::grpc::ClientAsyncReaderWriter< $Request$, $Response$>>("
+            "$AsyncPrefix$$Method$Raw(context, cq$AsyncRawArgs$));\n");
+        printer->Outdent();
+        printer->Print("}\n");
+      }
     }
   } else {
     if (method->NoStreaming()) {
-      printer->Print(*vars,
-                     "::grpc::ClientAsyncResponseReader< $Response$>* "
-                     "Async$Method$Raw(::grpc::ClientContext* context, "
-                     "const $Request$& request, "
-                     "::grpc::CompletionQueue* cq) override;\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        printer->Print(
+            *vars,
+            "::grpc::ClientAsyncResponseReader< $Response$>* "
+            "$AsyncPrefix$$Method$Raw(::grpc::ClientContext* context, "
+            "const $Request$& request, "
+            "::grpc::CompletionQueue* cq) override;\n");
+      }
     } else if (ClientOnlyStreaming(method)) {
       printer->Print(*vars,
                      "::grpc::ClientWriter< $Request$>* $Method$Raw("
                      "::grpc::ClientContext* context, $Response$* response) "
                      "override;\n");
-      printer->Print(*vars,
-                     "::grpc::ClientAsyncWriter< $Request$>* Async$Method$Raw("
-                     "::grpc::ClientContext* context, $Response$* response, "
-                     "::grpc::CompletionQueue* cq, void* tag) override;\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+        (*vars)["AsyncRawArgs"] = async_prefix.raw_args;
+        printer->Print(
+            *vars,
+            "::grpc::ClientAsyncWriter< $Request$>* $AsyncPrefix$$Method$Raw("
+            "::grpc::ClientContext* context, $Response$* response, "
+            "::grpc::CompletionQueue* cq$AsyncMethodParams$) override;\n");
+      }
     } else if (ServerOnlyStreaming(method)) {
       printer->Print(*vars,
                      "::grpc::ClientReader< $Response$>* $Method$Raw("
                      "::grpc::ClientContext* context, const $Request$& request)"
                      " override;\n");
-      printer->Print(
-          *vars,
-          "::grpc::ClientAsyncReader< $Response$>* Async$Method$Raw("
-          "::grpc::ClientContext* context, const $Request$& request, "
-          "::grpc::CompletionQueue* cq, void* tag) override;\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+        (*vars)["AsyncRawArgs"] = async_prefix.raw_args;
+        printer->Print(
+            *vars,
+            "::grpc::ClientAsyncReader< $Response$>* $AsyncPrefix$$Method$Raw("
+            "::grpc::ClientContext* context, const $Request$& request, "
+            "::grpc::CompletionQueue* cq$AsyncMethodParams$) override;\n");
+      }
     } else if (method->BidiStreaming()) {
       printer->Print(*vars,
                      "::grpc::ClientReaderWriter< $Request$, $Response$>* "
                      "$Method$Raw(::grpc::ClientContext* context) override;\n");
-      printer->Print(*vars,
-                     "::grpc::ClientAsyncReaderWriter< $Request$, $Response$>* "
-                     "Async$Method$Raw(::grpc::ClientContext* context, "
-                     "::grpc::CompletionQueue* cq, void* tag) override;\n");
+      for (auto async_prefix : async_prefixes) {
+        (*vars)["AsyncPrefix"] = async_prefix.prefix;
+        (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+        (*vars)["AsyncRawArgs"] = async_prefix.raw_args;
+        printer->Print(
+            *vars,
+            "::grpc::ClientAsyncReaderWriter< $Request$, $Response$>* "
+            "$AsyncPrefix$$Method$Raw(::grpc::ClientContext* context, "
+            "::grpc::CompletionQueue* cq$AsyncMethodParams$) override;\n");
+      }
     }
   }
 }
@@ -1077,6 +1172,13 @@ void PrintSourceClientMethod(grpc_generator::Printer *printer,
   (*vars)["Method"] = method->name();
   (*vars)["Request"] = method->input_type_name();
   (*vars)["Response"] = method->output_type_name();
+  struct {
+    grpc::string prefix;
+    grpc::string start;          // bool literal expressed as string
+    grpc::string method_params;  // extra arguments to method
+    grpc::string create_args;    // extra arguments to creator
+  } async_prefixes[] = {{"Async", "true", ", void* tag", ", tag"},
+                        {"PrepareAsync", "false", "", ", nullptr"}};
   if (method->NoStreaming()) {
     printer->Print(*vars,
                    "::grpc::Status $ns$$Service$::Stub::$Method$("
@@ -1087,19 +1189,23 @@ void PrintSourceClientMethod(grpc_generator::Printer *printer,
                    "rpcmethod_$Method$_, "
                    "context, request, response);\n"
                    "}\n\n");
-    printer->Print(
-        *vars,
-        "::grpc::ClientAsyncResponseReader< $Response$>* "
-        "$ns$$Service$::Stub::Async$Method$Raw(::grpc::ClientContext* context, "
-        "const $Request$& request, "
-        "::grpc::CompletionQueue* cq) {\n");
-    printer->Print(*vars,
-                   "  return "
-                   "::grpc::ClientAsyncResponseReader< $Response$>::Create("
-                   "channel_.get(), cq, "
-                   "rpcmethod_$Method$_, "
-                   "context, request);\n"
-                   "}\n\n");
+    for (auto async_prefix : async_prefixes) {
+      (*vars)["AsyncPrefix"] = async_prefix.prefix;
+      (*vars)["AsyncStart"] = async_prefix.start;
+      printer->Print(*vars,
+                     "::grpc::ClientAsyncResponseReader< $Response$>* "
+                     "$ns$$Service$::Stub::$AsyncPrefix$$Method$Raw(::grpc::"
+                     "ClientContext* context, "
+                     "const $Request$& request, "
+                     "::grpc::CompletionQueue* cq) {\n");
+      printer->Print(*vars,
+                     "  return "
+                     "::grpc::ClientAsyncResponseReader< $Response$>::Create("
+                     "channel_.get(), cq, "
+                     "rpcmethod_$Method$_, "
+                     "context, request, $AsyncStart$);\n"
+                     "}\n\n");
+    }
   } else if (ClientOnlyStreaming(method)) {
     printer->Print(*vars,
                    "::grpc::ClientWriter< $Request$>* "
@@ -1111,17 +1217,23 @@ void PrintSourceClientMethod(grpc_generator::Printer *printer,
                    "rpcmethod_$Method$_, "
                    "context, response);\n"
                    "}\n\n");
-    printer->Print(*vars,
-                   "::grpc::ClientAsyncWriter< $Request$>* "
-                   "$ns$$Service$::Stub::Async$Method$Raw("
-                   "::grpc::ClientContext* context, $Response$* response, "
-                   "::grpc::CompletionQueue* cq, void* tag) {\n");
-    printer->Print(*vars,
-                   "  return ::grpc::ClientAsyncWriter< $Request$>::Create("
-                   "channel_.get(), cq, "
-                   "rpcmethod_$Method$_, "
-                   "context, response, tag);\n"
-                   "}\n\n");
+    for (auto async_prefix : async_prefixes) {
+      (*vars)["AsyncPrefix"] = async_prefix.prefix;
+      (*vars)["AsyncStart"] = async_prefix.start;
+      (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+      (*vars)["AsyncCreateArgs"] = async_prefix.create_args;
+      printer->Print(*vars,
+                     "::grpc::ClientAsyncWriter< $Request$>* "
+                     "$ns$$Service$::Stub::$AsyncPrefix$$Method$Raw("
+                     "::grpc::ClientContext* context, $Response$* response, "
+                     "::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
+      printer->Print(*vars,
+                     "  return ::grpc::ClientAsyncWriter< $Request$>::Create("
+                     "channel_.get(), cq, "
+                     "rpcmethod_$Method$_, "
+                     "context, response, $AsyncStart$$AsyncCreateArgs$);\n"
+                     "}\n\n");
+    }
   } else if (ServerOnlyStreaming(method)) {
     printer->Print(
         *vars,
@@ -1134,17 +1246,24 @@ void PrintSourceClientMethod(grpc_generator::Printer *printer,
                    "rpcmethod_$Method$_, "
                    "context, request);\n"
                    "}\n\n");
-    printer->Print(*vars,
-                   "::grpc::ClientAsyncReader< $Response$>* "
-                   "$ns$$Service$::Stub::Async$Method$Raw("
-                   "::grpc::ClientContext* context, const $Request$& request, "
-                   "::grpc::CompletionQueue* cq, void* tag) {\n");
-    printer->Print(*vars,
-                   "  return ::grpc::ClientAsyncReader< $Response$>::Create("
-                   "channel_.get(), cq, "
-                   "rpcmethod_$Method$_, "
-                   "context, request, tag);\n"
-                   "}\n\n");
+    for (auto async_prefix : async_prefixes) {
+      (*vars)["AsyncPrefix"] = async_prefix.prefix;
+      (*vars)["AsyncStart"] = async_prefix.start;
+      (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+      (*vars)["AsyncCreateArgs"] = async_prefix.create_args;
+      printer->Print(
+          *vars,
+          "::grpc::ClientAsyncReader< $Response$>* "
+          "$ns$$Service$::Stub::$AsyncPrefix$$Method$Raw("
+          "::grpc::ClientContext* context, const $Request$& request, "
+          "::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
+      printer->Print(*vars,
+                     "  return ::grpc::ClientAsyncReader< $Response$>::Create("
+                     "channel_.get(), cq, "
+                     "rpcmethod_$Method$_, "
+                     "context, request, $AsyncStart$$AsyncCreateArgs$);\n"
+                     "}\n\n");
+    }
   } else if (method->BidiStreaming()) {
     printer->Print(
         *vars,
@@ -1157,19 +1276,25 @@ void PrintSourceClientMethod(grpc_generator::Printer *printer,
                    "rpcmethod_$Method$_, "
                    "context);\n"
                    "}\n\n");
-    printer->Print(
-        *vars,
-        "::grpc::ClientAsyncReaderWriter< $Request$, $Response$>* "
-        "$ns$$Service$::Stub::Async$Method$Raw(::grpc::ClientContext* context, "
-        "::grpc::CompletionQueue* cq, void* tag) {\n");
-    printer->Print(
-        *vars,
-        "  return "
-        "::grpc::ClientAsyncReaderWriter< $Request$, $Response$>::Create("
-        "channel_.get(), cq, "
-        "rpcmethod_$Method$_, "
-        "context, tag);\n"
-        "}\n\n");
+    for (auto async_prefix : async_prefixes) {
+      (*vars)["AsyncPrefix"] = async_prefix.prefix;
+      (*vars)["AsyncStart"] = async_prefix.start;
+      (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+      (*vars)["AsyncCreateArgs"] = async_prefix.create_args;
+      printer->Print(*vars,
+                     "::grpc::ClientAsyncReaderWriter< $Request$, $Response$>* "
+                     "$ns$$Service$::Stub::$AsyncPrefix$$Method$Raw(::grpc::"
+                     "ClientContext* context, "
+                     "::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
+      printer->Print(
+          *vars,
+          "  return "
+          "::grpc::ClientAsyncReaderWriter< $Request$, $Response$>::Create("
+          "channel_.get(), cq, "
+          "rpcmethod_$Method$_, "
+          "context, $AsyncStart$$AsyncCreateArgs$);\n"
+          "}\n\n");
+    }
   }
 }
 
@@ -1460,50 +1585,79 @@ void PrintMockClientMethods(grpc_generator::Printer *printer,
   (*vars)["Request"] = method->input_type_name();
   (*vars)["Response"] = method->output_type_name();
 
+  struct {
+    grpc::string prefix;
+    grpc::string method_params;  // extra arguments to method
+    int extra_method_param_count;
+  } async_prefixes[] = {{"Async", ", void* tag", 1}, {"PrepareAsync", "", 0}};
+
   if (method->NoStreaming()) {
     printer->Print(
         *vars,
         "MOCK_METHOD3($Method$, ::grpc::Status(::grpc::ClientContext* context, "
         "const $Request$& request, $Response$* response));\n");
-    printer->Print(*vars,
-                   "MOCK_METHOD3(Async$Method$Raw, "
-                   "::grpc::ClientAsyncResponseReaderInterface< $Response$>*"
-                   "(::grpc::ClientContext* context, const $Request$& request, "
-                   "::grpc::CompletionQueue* cq));\n");
+    for (auto async_prefix : async_prefixes) {
+      (*vars)["AsyncPrefix"] = async_prefix.prefix;
+      printer->Print(
+          *vars,
+          "MOCK_METHOD3($AsyncPrefix$$Method$Raw, "
+          "::grpc::ClientAsyncResponseReaderInterface< $Response$>*"
+          "(::grpc::ClientContext* context, const $Request$& request, "
+          "::grpc::CompletionQueue* cq));\n");
+    }
   } else if (ClientOnlyStreaming(method)) {
     printer->Print(
         *vars,
         "MOCK_METHOD2($Method$Raw, "
         "::grpc::ClientWriterInterface< $Request$>*"
         "(::grpc::ClientContext* context, $Response$* response));\n");
-    printer->Print(*vars,
-                   "MOCK_METHOD4(Async$Method$Raw, "
-                   "::grpc::ClientAsyncWriterInterface< $Request$>*"
-                   "(::grpc::ClientContext* context, $Response$* response, "
-                   "::grpc::CompletionQueue* cq, void* tag));\n");
+    for (auto async_prefix : async_prefixes) {
+      (*vars)["AsyncPrefix"] = async_prefix.prefix;
+      (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+      (*vars)["MockArgs"] =
+          std::to_string(3 + async_prefix.extra_method_param_count);
+      printer->Print(*vars,
+                     "MOCK_METHOD$MockArgs$($AsyncPrefix$$Method$Raw, "
+                     "::grpc::ClientAsyncWriterInterface< $Request$>*"
+                     "(::grpc::ClientContext* context, $Response$* response, "
+                     "::grpc::CompletionQueue* cq$AsyncMethodParams$));\n");
+    }
   } else if (ServerOnlyStreaming(method)) {
     printer->Print(
         *vars,
         "MOCK_METHOD2($Method$Raw, "
         "::grpc::ClientReaderInterface< $Response$>*"
         "(::grpc::ClientContext* context, const $Request$& request));\n");
-    printer->Print(*vars,
-                   "MOCK_METHOD4(Async$Method$Raw, "
-                   "::grpc::ClientAsyncReaderInterface< $Response$>*"
-                   "(::grpc::ClientContext* context, const $Request$& request, "
-                   "::grpc::CompletionQueue* cq, void* tag));\n");
+    for (auto async_prefix : async_prefixes) {
+      (*vars)["AsyncPrefix"] = async_prefix.prefix;
+      (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+      (*vars)["MockArgs"] =
+          std::to_string(3 + async_prefix.extra_method_param_count);
+      printer->Print(
+          *vars,
+          "MOCK_METHOD$MockArgs$($AsyncPrefix$$Method$Raw, "
+          "::grpc::ClientAsyncReaderInterface< $Response$>*"
+          "(::grpc::ClientContext* context, const $Request$& request, "
+          "::grpc::CompletionQueue* cq$AsyncMethodParams$));\n");
+    }
   } else if (method->BidiStreaming()) {
     printer->Print(
         *vars,
         "MOCK_METHOD1($Method$Raw, "
         "::grpc::ClientReaderWriterInterface< $Request$, $Response$>*"
         "(::grpc::ClientContext* context));\n");
-    printer->Print(
-        *vars,
-        "MOCK_METHOD3(Async$Method$Raw, "
-        "::grpc::ClientAsyncReaderWriterInterface<$Request$, $Response$>*"
-        "(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq, "
-        "void* tag));\n");
+    for (auto async_prefix : async_prefixes) {
+      (*vars)["AsyncPrefix"] = async_prefix.prefix;
+      (*vars)["AsyncMethodParams"] = async_prefix.method_params;
+      (*vars)["MockArgs"] =
+          std::to_string(2 + async_prefix.extra_method_param_count);
+      printer->Print(
+          *vars,
+          "MOCK_METHOD$MockArgs$($AsyncPrefix$$Method$Raw, "
+          "::grpc::ClientAsyncReaderWriterInterface<$Request$, $Response$>*"
+          "(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq"
+          "$AsyncMethodParams$));\n");
+    }
   }
 }
 
diff --git a/src/compiler/php_generator.cc b/src/compiler/php_generator.cc
index 67967d0bd7..6d9ff3a29c 100644
--- a/src/compiler/php_generator.cc
+++ b/src/compiler/php_generator.cc
@@ -33,7 +33,7 @@ using std::map;
 namespace grpc_php_generator {
 namespace {
 
-grpc::string MessageIdentifierName(const grpc::string &name) {
+grpc::string ConvertToPhpNamespace(const grpc::string &name) {
   std::vector<grpc::string> tokens = grpc_generator::tokenize(name, ".");
   std::ostringstream oss;
   for (unsigned int i = 0; i < tokens.size(); i++) {
@@ -43,14 +43,33 @@ grpc::string MessageIdentifierName(const grpc::string &name) {
   return oss.str();
 }
 
+grpc::string PackageName(const FileDescriptor *file) {
+  if (file->options().has_php_namespace()) {
+    return file->options().php_namespace();
+  } else {
+    return ConvertToPhpNamespace(file->package());
+  }
+}
+
+grpc::string MessageIdentifierName(const grpc::string &name,
+                                   const FileDescriptor *file) {
+  std::vector<grpc::string> tokens = grpc_generator::tokenize(name, ".");
+  std::ostringstream oss;
+  oss << PackageName(file) << "\\"
+      << grpc_generator::CapitalizeFirstLetter(tokens[tokens.size() - 1]);
+  return oss.str();
+}
+
 void PrintMethod(const MethodDescriptor *method, Printer *out) {
   const Descriptor *input_type = method->input_type();
   const Descriptor *output_type = method->output_type();
   map<grpc::string, grpc::string> vars;
   vars["service_name"] = method->service()->full_name();
   vars["name"] = method->name();
-  vars["input_type_id"] = MessageIdentifierName(input_type->full_name());
-  vars["output_type_id"] = MessageIdentifierName(output_type->full_name());
+  vars["input_type_id"] =
+      MessageIdentifierName(input_type->full_name(), input_type->file());
+  vars["output_type_id"] =
+      MessageIdentifierName(output_type->full_name(), output_type->file());
 
   out->Print("/**\n");
   out->Print(GetPHPComments(method, " *").c_str());
@@ -149,12 +168,7 @@ grpc::string GenerateFile(const FileDescriptor *file,
     }
 
     map<grpc::string, grpc::string> vars;
-    grpc::string php_namespace;
-    if (file->options().has_php_namespace()) {
-      php_namespace = file->options().php_namespace();
-    } else {
-      php_namespace = MessageIdentifierName(file->package());
-    }
+    grpc::string php_namespace = PackageName(file);
     vars["package"] = php_namespace;
     out.Print(vars, "namespace $package$;\n\n");
 
diff --git a/src/compiler/python_generator.cc b/src/compiler/python_generator.cc
index 31b177c28e..ef2d90de9e 100644
--- a/src/compiler/python_generator.cc
+++ b/src/compiler/python_generator.cc
@@ -767,9 +767,9 @@ bool PythonGrpcGenerator::Generate(const FileDescriptor* file,
 
   ProtoBufFile pbfile(file);
   PrivateGenerator generator(config_, &pbfile);
-  if (parameter == "grpc_2_0") {
+  if (parameter == "" || parameter == "grpc_2_0") {
     return GenerateGrpc(context, generator, pb2_grpc_file_name, true);
-  } else if (parameter == "") {
+  } else if (parameter == "grpc_1_0") {
     return GenerateGrpc(context, generator, pb2_grpc_file_name, true) &&
            GenerateGrpc(context, generator, pb2_file_name, false);
   } else {
diff --git a/src/core/ext/census/base_resources.c b/src/core/ext/census/base_resources.c
index 2114bf04cd..1f2bb39fe0 100644
--- a/src/core/ext/census/base_resources.c
+++ b/src/core/ext/census/base_resources.c
@@ -37,20 +37,20 @@
 void define_base_resources() {
   google_census_Resource_BasicUnit numerator =
       google_census_Resource_BasicUnit_SECS;
-  resource r = {"client_rpc_latency",             // name
-                "Client RPC latency in seconds",  // description
-                0,                                // prefix
-                1,                                // n_numerators
-                &numerator,                       // numerators
-                0,                                // n_denominators
-                NULL};                            // denominators
+  resource r = {(char *)"client_rpc_latency",             // name
+                (char *)"Client RPC latency in seconds",  // description
+                0,                                        // prefix
+                1,                                        // n_numerators
+                &numerator,                               // numerators
+                0,                                        // n_denominators
+                NULL};                                    // denominators
   define_resource(&r);
-  r = (resource){"server_rpc_latency",             // name
-                 "Server RPC latency in seconds",  // description
-                 0,                                // prefix
-                 1,                                // n_numerators
-                 &numerator,                       // numerators
-                 0,                                // n_denominators
-                 NULL};                            // denominators
+  r = (resource){(char *)"server_rpc_latency",             // name
+                 (char *)"Server RPC latency in seconds",  // description
+                 0,                                        // prefix
+                 1,                                        // n_numerators
+                 &numerator,                               // numerators
+                 0,                                        // n_denominators
+                 NULL};                                    // denominators
   define_resource(&r);
 }
diff --git a/src/core/ext/filters/client_channel/channel_connectivity.c b/src/core/ext/filters/client_channel/channel_connectivity.c
index e5f6fa76ae..3844b98021 100644
--- a/src/core/ext/filters/client_channel/channel_connectivity.c
+++ b/src/core/ext/filters/client_channel/channel_connectivity.c
@@ -86,7 +86,7 @@ static void delete_state_watcher(grpc_exec_ctx *exec_ctx, state_watcher *w) {
 
 static void finished_completion(grpc_exec_ctx *exec_ctx, void *pw,
                                 grpc_cq_completion *ignored) {
-  int delete = 0;
+  bool should_delete = false;
   state_watcher *w = (state_watcher *)pw;
   gpr_mu_lock(&w->mu);
   switch (w->phase) {
@@ -94,12 +94,12 @@ static void finished_completion(grpc_exec_ctx *exec_ctx, void *pw,
     case READY_TO_CALL_BACK:
       GPR_UNREACHABLE_CODE(return );
     case CALLING_BACK_AND_FINISHED:
-      delete = 1;
+      should_delete = true;
       break;
   }
   gpr_mu_unlock(&w->mu);
 
-  if (delete) {
+  if (should_delete) {
     delete_state_watcher(exec_ctx, w);
   }
 }
@@ -161,12 +161,12 @@ static void partly_done(grpc_exec_ctx *exec_ctx, state_watcher *w,
 
 static void watch_complete(grpc_exec_ctx *exec_ctx, void *pw,
                            grpc_error *error) {
-  partly_done(exec_ctx, pw, true, GRPC_ERROR_REF(error));
+  partly_done(exec_ctx, (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, pw, false, GRPC_ERROR_REF(error));
+  partly_done(exec_ctx, (state_watcher *)pw, false, GRPC_ERROR_REF(error));
 }
 
 int grpc_channel_num_external_connectivity_watchers(grpc_channel *channel) {
diff --git a/src/core/ext/filters/client_channel/client_channel.c b/src/core/ext/filters/client_channel/client_channel.c
index dad5c4fce5..016199b1f4 100644
--- a/src/core/ext/filters/client_channel/client_channel.c
+++ b/src/core/ext/filters/client_channel/client_channel.c
@@ -85,7 +85,7 @@ static void method_parameters_unref(method_parameters *method_params) {
 }
 
 static void method_parameters_free(grpc_exec_ctx *exec_ctx, void *value) {
-  method_parameters_unref(value);
+  method_parameters_unref((method_parameters *)value);
 }
 
 static bool parse_wait_for_ready(grpc_json *field,
@@ -375,7 +375,7 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx *exec_ctx,
   }
   // Extract the following fields from the resolver result, if non-NULL.
   bool lb_policy_updated = false;
-  char *lb_policy_name = NULL;
+  char *lb_policy_name_dup = NULL;
   bool lb_policy_name_changed = false;
   grpc_lb_policy *new_lb_policy = NULL;
   char *service_config_json = NULL;
@@ -383,6 +383,7 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx *exec_ctx,
   grpc_slice_hash_table *method_params_table = NULL;
   if (chand->resolver_result != NULL) {
     // Find LB policy name.
+    const char *lb_policy_name = NULL;
     const grpc_arg *channel_arg =
         grpc_channel_args_find(chand->resolver_result, GRPC_ARG_LB_POLICY_NAME);
     if (channel_arg != NULL) {
@@ -473,7 +474,7 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx *exec_ctx,
     // Before we clean up, save a copy of lb_policy_name, since it might
     // be pointing to data inside chand->resolver_result.
     // The copy will be saved in chand->lb_policy_name below.
-    lb_policy_name = gpr_strdup(lb_policy_name);
+    lb_policy_name_dup = gpr_strdup(lb_policy_name);
     grpc_channel_args_destroy(exec_ctx, chand->resolver_result);
     chand->resolver_result = NULL;
   }
@@ -481,8 +482,8 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx *exec_ctx,
     gpr_log(GPR_DEBUG,
             "chand=%p: resolver result: lb_policy_name=\"%s\"%s, "
             "service_config=\"%s\"",
-            chand, lb_policy_name, lb_policy_name_changed ? " (changed)" : "",
-            service_config_json);
+            chand, lb_policy_name_dup,
+            lb_policy_name_changed ? " (changed)" : "", service_config_json);
   }
   // Now swap out fields in chand.  Note that the new values may still
   // be NULL if (e.g.) the resolver failed to return results or the
@@ -490,9 +491,9 @@ static void on_resolver_result_changed_locked(grpc_exec_ctx *exec_ctx,
   //
   // First, swap out the data used by cc_get_channel_info().
   gpr_mu_lock(&chand->info_mu);
-  if (lb_policy_name != NULL) {
+  if (lb_policy_name_dup != NULL) {
     gpr_free(chand->info_lb_policy_name);
-    chand->info_lb_policy_name = lb_policy_name;
+    chand->info_lb_policy_name = lb_policy_name_dup;
   }
   if (service_config_json != NULL) {
     gpr_free(chand->info_service_config_json);
@@ -717,7 +718,8 @@ static grpc_error *cc_init_channel_elem(grpc_exec_ctx *exec_ctx,
     return GRPC_ERROR_CREATE_FROM_STATIC_STRING(
         "client channel factory arg must be a pointer");
   }
-  grpc_client_channel_factory_ref(arg->value.pointer.p);
+  grpc_client_channel_factory_ref(
+      (grpc_client_channel_factory *)arg->value.pointer.p);
   chand->client_channel_factory =
       (grpc_client_channel_factory *)arg->value.pointer.p;
   // Get server name to resolve, using proxy mapper if needed.
@@ -1016,13 +1018,11 @@ static void create_subchannel_call_locked(grpc_exec_ctx *exec_ctx,
   GRPC_ERROR_UNREF(error);
 }
 
-static void subchannel_ready_locked(grpc_exec_ctx *exec_ctx,
-                                    grpc_call_element *elem,
-                                    grpc_error *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) {
   call_data *calld = (call_data *)elem->call_data;
   channel_data *chand = (channel_data *)elem->channel_data;
-  grpc_polling_entity_del_from_pollset_set(exec_ctx, calld->pollent,
-                                           chand->interested_parties);
   if (calld->connected_subchannel == NULL) {
     // Failed to create subchannel.
     GRPC_ERROR_UNREF(calld->error);
@@ -1044,12 +1044,116 @@ static void subchannel_ready_locked(grpc_exec_ctx *exec_ctx,
   GRPC_ERROR_UNREF(error);
 }
 
-/** Return true if subchannel is available immediately (in which case
-    subchannel_ready_locked() should not be called), or false otherwise (in
-    which case subchannel_ready_locked() should be called when the subchannel
-    is available). */
-static bool pick_subchannel_locked(grpc_exec_ctx *exec_ctx,
-                                   grpc_call_element *elem);
+// A wrapper around pick_done_locked() that is used in cases where
+// 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) {
+  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,
+                                           chand->interested_parties);
+  pick_done_locked(exec_ctx, 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) {
+  grpc_call_element *elem = (grpc_call_element *)arg;
+  channel_data *chand = (channel_data *)elem->channel_data;
+  call_data *calld = (call_data *)elem->call_data;
+  if (calld->lb_policy != NULL) {
+    if (GRPC_TRACER_ON(grpc_client_channel_trace)) {
+      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_CALL_STACK_UNREF(exec_ctx, 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) {
+  grpc_call_element *elem = (grpc_call_element *)arg;
+  channel_data *chand = (channel_data *)elem->channel_data;
+  call_data *calld = (call_data *)elem->call_data;
+  if (GRPC_TRACER_ON(grpc_client_channel_trace)) {
+    gpr_log(GPR_DEBUG, "chand=%p calld=%p: pick completed asynchronously",
+            chand, calld);
+  }
+  GPR_ASSERT(calld->lb_policy != NULL);
+  GRPC_LB_POLICY_UNREF(exec_ctx, calld->lb_policy, "pick_subchannel");
+  calld->lb_policy = NULL;
+  async_pick_done_locked(exec_ctx, 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) {
+  channel_data *chand = (channel_data *)elem->channel_data;
+  call_data *calld = (call_data *)elem->call_data;
+  if (GRPC_TRACER_ON(grpc_client_channel_trace)) {
+    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);
+  // If the application explicitly set wait_for_ready, use that.
+  // Otherwise, if the service config specified a value for this
+  // method, use that.
+  uint32_t initial_metadata_flags =
+      calld->initial_metadata_batch->payload->send_initial_metadata
+          .send_initial_metadata_flags;
+  const bool wait_for_ready_set_from_api =
+      initial_metadata_flags &
+      GRPC_INITIAL_METADATA_WAIT_FOR_READY_EXPLICITLY_SET;
+  const bool wait_for_ready_set_from_service_config =
+      calld->method_params != NULL &&
+      calld->method_params->wait_for_ready != WAIT_FOR_READY_UNSET;
+  if (!wait_for_ready_set_from_api && wait_for_ready_set_from_service_config) {
+    if (calld->method_params->wait_for_ready == WAIT_FOR_READY_TRUE) {
+      initial_metadata_flags |= GRPC_INITIAL_METADATA_WAIT_FOR_READY;
+    } else {
+      initial_metadata_flags &= ~GRPC_INITIAL_METADATA_WAIT_FOR_READY;
+    }
+  }
+  const grpc_lb_policy_pick_args inputs = {
+      calld->initial_metadata_batch->payload->send_initial_metadata
+          .send_initial_metadata,
+      initial_metadata_flags, &calld->lb_token_mdelem};
+  // Keep a ref to the LB policy in calld while the pick is pending.
+  GRPC_LB_POLICY_REF(chand->lb_policy, "pick_subchannel");
+  calld->lb_policy = chand->lb_policy;
+  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,
+      calld->subchannel_call_context, NULL, &calld->lb_pick_closure);
+  if (pick_done) {
+    /* synchronous grpc_lb_policy_pick call. Unref the LB policy. */
+    if (GRPC_TRACER_ON(grpc_client_channel_trace)) {
+      gpr_log(GPR_DEBUG, "chand=%p calld=%p: pick completed synchronously",
+              chand, calld);
+    }
+    GRPC_LB_POLICY_UNREF(exec_ctx, calld->lb_policy, "pick_subchannel");
+    calld->lb_policy = NULL;
+  } else {
+    GRPC_CALL_STACK_REF(calld->owning_call, "pick_callback_cancel");
+    grpc_call_combiner_set_notify_on_cancel(
+        exec_ctx, calld->call_combiner,
+        GRPC_CLOSURE_INIT(&calld->lb_pick_cancel_closure,
+                          pick_callback_cancel_locked, elem,
+                          grpc_combiner_scheduler(chand->combiner)));
+  }
+  return pick_done;
+}
 
 typedef struct {
   grpc_call_element *elem;
@@ -1069,17 +1173,17 @@ static void pick_after_resolver_result_cancel_locked(grpc_exec_ctx *exec_ctx,
     gpr_free(args);
     return;
   }
-  args->finished = true;
-  grpc_call_element *elem = args->elem;
-  channel_data *chand = (channel_data *)elem->channel_data;
-  call_data *calld = (call_data *)elem->call_data;
   // If we don't yet have a resolver result, then a closure for
   // pick_after_resolver_result_done_locked() will have been added to
   // chand->waiting_for_resolver_result_closures, and it may not be invoked
   // until after this call has been destroyed.  We mark the operation as
   // finished, so that when pick_after_resolver_result_done_locked()
   // is called, it will be a no-op.  We also immediately invoke
-  // subchannel_ready_locked() to propagate the error back to the caller.
+  // async_pick_done_locked() to propagate the error back to the caller.
+  args->finished = true;
+  grpc_call_element *elem = args->elem;
+  channel_data *chand = (channel_data *)elem->channel_data;
+  call_data *calld = (call_data *)elem->call_data;
   if (GRPC_TRACER_ON(grpc_client_channel_trace)) {
     gpr_log(GPR_DEBUG,
             "chand=%p calld=%p: cancelling pick waiting for resolver result",
@@ -1087,12 +1191,12 @@ static void pick_after_resolver_result_cancel_locked(grpc_exec_ctx *exec_ctx,
   }
   // Note: Although we are not in the call combiner here, we are
   // basically stealing the call combiner from the pending pick, so
-  // it's safe to call subchannel_ready_locked() here -- we are
+  // 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().
-  subchannel_ready_locked(exec_ctx, elem,
-                          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-                              "Pick cancelled", &error, 1));
+  async_pick_done_locked(exec_ctx, elem,
+                         GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                             "Pick cancelled", &error, 1));
 }
 
 static void pick_after_resolver_result_done_locked(grpc_exec_ctx *exec_ctx,
@@ -1117,14 +1221,19 @@ 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);
     }
-    subchannel_ready_locked(exec_ctx, elem, GRPC_ERROR_REF(error));
+    async_pick_done_locked(exec_ctx, elem, GRPC_ERROR_REF(error));
   } else {
     if (GRPC_TRACER_ON(grpc_client_channel_trace)) {
       gpr_log(GPR_DEBUG, "chand=%p calld=%p: resolver returned, doing pick",
               chand, calld);
     }
-    if (pick_subchannel_locked(exec_ctx, elem)) {
-      subchannel_ready_locked(exec_ctx, elem, GRPC_ERROR_NONE);
+    if (pick_callback_start_locked(exec_ctx, 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);
     }
   }
 }
@@ -1152,154 +1261,38 @@ static void pick_after_resolver_result_start_locked(grpc_exec_ctx *exec_ctx,
                         grpc_combiner_scheduler(chand->combiner)));
 }
 
-// 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) {
-  grpc_call_element *elem = (grpc_call_element *)arg;
-  channel_data *chand = (channel_data *)elem->channel_data;
-  call_data *calld = (call_data *)elem->call_data;
-  if (error != GRPC_ERROR_NONE && calld->lb_policy != NULL) {
-    if (GRPC_TRACER_ON(grpc_client_channel_trace)) {
-      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_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "pick_callback_cancel");
-}
-
-// Callback invoked by grpc_lb_policy_pick_locked() for async picks.
-// Unrefs the LB policy and invokes subchannel_ready_locked().
-static void pick_callback_done_locked(grpc_exec_ctx *exec_ctx, void *arg,
-                                      grpc_error *error) {
+static void start_pick_locked(grpc_exec_ctx *exec_ctx, void *arg,
+                              grpc_error *ignored) {
   grpc_call_element *elem = (grpc_call_element *)arg;
-  channel_data *chand = (channel_data *)elem->channel_data;
   call_data *calld = (call_data *)elem->call_data;
-  if (GRPC_TRACER_ON(grpc_client_channel_trace)) {
-    gpr_log(GPR_DEBUG, "chand=%p calld=%p: pick completed asynchronously",
-            chand, calld);
-  }
-  GPR_ASSERT(calld->lb_policy != NULL);
-  GRPC_LB_POLICY_UNREF(exec_ctx, calld->lb_policy, "pick_subchannel");
-  calld->lb_policy = NULL;
-  subchannel_ready_locked(exec_ctx, 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,
-                                       const grpc_lb_policy_pick_args *inputs) {
   channel_data *chand = (channel_data *)elem->channel_data;
-  call_data *calld = (call_data *)elem->call_data;
-  if (GRPC_TRACER_ON(grpc_client_channel_trace)) {
-    gpr_log(GPR_DEBUG, "chand=%p calld=%p: starting pick on lb_policy=%p",
-            chand, calld, chand->lb_policy);
-  }
-  // Keep a ref to the LB policy in calld while the pick is pending.
-  GRPC_LB_POLICY_REF(chand->lb_policy, "pick_subchannel");
-  calld->lb_policy = chand->lb_policy;
-  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,
-      calld->subchannel_call_context, NULL, &calld->lb_pick_closure);
-  if (pick_done) {
-    /* synchronous grpc_lb_policy_pick call. Unref the LB policy. */
-    if (GRPC_TRACER_ON(grpc_client_channel_trace)) {
-      gpr_log(GPR_DEBUG, "chand=%p calld=%p: pick completed synchronously",
-              chand, calld);
+  GPR_ASSERT(calld->connected_subchannel == NULL);
+  if (chand->lb_policy != NULL) {
+    // We already have an LB policy, so ask it for a pick.
+    if (pick_callback_start_locked(exec_ctx, elem)) {
+      // Pick completed synchronously.
+      pick_done_locked(exec_ctx, elem, GRPC_ERROR_NONE);
+      return;
     }
-    GRPC_LB_POLICY_UNREF(exec_ctx, calld->lb_policy, "pick_subchannel");
-    calld->lb_policy = NULL;
   } else {
-    GRPC_CALL_STACK_REF(calld->owning_call, "pick_callback_cancel");
-    grpc_call_combiner_set_notify_on_cancel(
-        exec_ctx, calld->call_combiner,
-        GRPC_CLOSURE_INIT(&calld->lb_pick_cancel_closure,
-                          pick_callback_cancel_locked, elem,
-                          grpc_combiner_scheduler(chand->combiner)));
-  }
-  return pick_done;
-}
-
-static bool pick_subchannel_locked(grpc_exec_ctx *exec_ctx,
-                                   grpc_call_element *elem) {
-  GPR_TIMER_BEGIN("pick_subchannel", 0);
-  channel_data *chand = (channel_data *)elem->channel_data;
-  call_data *calld = (call_data *)elem->call_data;
-  bool pick_done = false;
-  if (chand->lb_policy != NULL) {
-    apply_service_config_to_call_locked(exec_ctx, elem);
-    // If the application explicitly set wait_for_ready, use that.
-    // Otherwise, if the service config specified a value for this
-    // method, use that.
-    uint32_t initial_metadata_flags =
-        calld->initial_metadata_batch->payload->send_initial_metadata
-            .send_initial_metadata_flags;
-    const bool wait_for_ready_set_from_api =
-        initial_metadata_flags &
-        GRPC_INITIAL_METADATA_WAIT_FOR_READY_EXPLICITLY_SET;
-    const bool wait_for_ready_set_from_service_config =
-        calld->method_params != NULL &&
-        calld->method_params->wait_for_ready != WAIT_FOR_READY_UNSET;
-    if (!wait_for_ready_set_from_api &&
-        wait_for_ready_set_from_service_config) {
-      if (calld->method_params->wait_for_ready == WAIT_FOR_READY_TRUE) {
-        initial_metadata_flags |= GRPC_INITIAL_METADATA_WAIT_FOR_READY;
-      } else {
-        initial_metadata_flags &= ~GRPC_INITIAL_METADATA_WAIT_FOR_READY;
-      }
+    // We do not yet have an LB policy, so wait for a resolver result.
+    if (chand->resolver == NULL) {
+      pick_done_locked(exec_ctx, elem,
+                       GRPC_ERROR_CREATE_FROM_STATIC_STRING("Disconnected"));
+      return;
     }
-    const grpc_lb_policy_pick_args inputs = {
-        calld->initial_metadata_batch->payload->send_initial_metadata
-            .send_initial_metadata,
-        initial_metadata_flags, &calld->lb_token_mdelem};
-    pick_done = pick_callback_start_locked(exec_ctx, elem, &inputs);
-  } else if (chand->resolver != NULL) {
     if (!chand->started_resolving) {
       start_resolving_locked(exec_ctx, chand);
     }
     pick_after_resolver_result_start_locked(exec_ctx, elem);
-  } else {
-    subchannel_ready_locked(
-        exec_ctx, elem, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Disconnected"));
-  }
-  GPR_TIMER_END("pick_subchannel", 0);
-  return pick_done;
-}
-
-static void start_pick_locked(grpc_exec_ctx *exec_ctx, void *arg,
-                              grpc_error *error_ignored) {
-  GPR_TIMER_BEGIN("start_pick_locked", 0);
-  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 == NULL);
-  if (pick_subchannel_locked(exec_ctx, elem)) {
-    // Pick was returned synchronously.
-    if (calld->connected_subchannel == NULL) {
-      GRPC_ERROR_UNREF(calld->error);
-      calld->error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
-          "Call dropped by load balancing policy");
-      waiting_for_pick_batches_fail(exec_ctx, elem,
-                                    GRPC_ERROR_REF(calld->error));
-    } else {
-      // Create subchannel call.
-      create_subchannel_call_locked(exec_ctx, elem, GRPC_ERROR_NONE);
-    }
-  } else {
-    // Pick will be done asynchronously.  Add the call's polling entity to
-    // the channel's interested_parties, so that I/O for the resolver
-    // and LB policy can be done under it.
-    grpc_polling_entity_add_to_pollset_set(exec_ctx, calld->pollent,
-                                           chand->interested_parties);
   }
-  GPR_TIMER_END("start_pick_locked", 0);
+  // 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,
+                                         chand->interested_parties);
 }
 
 static void on_complete(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
@@ -1394,7 +1387,8 @@ static void cc_start_transport_stream_op_batch(
   // combiner to start a pick.
   if (batch->send_initial_metadata) {
     if (GRPC_TRACER_ON(grpc_client_channel_trace)) {
-      gpr_log(GPR_DEBUG, "chand=%p calld=%p: entering combiner", chand, calld);
+      gpr_log(GPR_DEBUG, "chand=%p calld=%p: entering client_channel combiner",
+              chand, calld);
     }
     GRPC_CLOSURE_SCHED(
         exec_ctx,
diff --git a/src/core/ext/filters/client_channel/client_channel_factory.c b/src/core/ext/filters/client_channel/client_channel_factory.c
index 7220a8639e..57eac8f875 100644
--- a/src/core/ext/filters/client_channel/client_channel_factory.c
+++ b/src/core/ext/filters/client_channel/client_channel_factory.c
@@ -43,14 +43,13 @@ grpc_channel* grpc_client_channel_factory_create_channel(
 }
 
 static void* factory_arg_copy(void* factory) {
-  grpc_client_channel_factory_ref(factory);
+  grpc_client_channel_factory_ref((grpc_client_channel_factory*)factory);
   return factory;
 }
 
 static void factory_arg_destroy(grpc_exec_ctx* exec_ctx, void* factory) {
-  // TODO(roth): Remove local exec_ctx when
-  // https://github.com/grpc/grpc/pull/8705 is merged.
-  grpc_client_channel_factory_unref(exec_ctx, factory);
+  grpc_client_channel_factory_unref(exec_ctx,
+                                    (grpc_client_channel_factory*)factory);
 }
 
 static int factory_arg_cmp(void* factory1, void* factory2) {
@@ -64,6 +63,6 @@ static const grpc_arg_pointer_vtable factory_arg_vtable = {
 
 grpc_arg grpc_client_channel_factory_create_channel_arg(
     grpc_client_channel_factory* factory) {
-  return grpc_channel_arg_pointer_create(GRPC_ARG_CLIENT_CHANNEL_FACTORY,
+  return grpc_channel_arg_pointer_create((char*)GRPC_ARG_CLIENT_CHANNEL_FACTORY,
                                          factory, &factory_arg_vtable);
 }
diff --git a/src/core/ext/filters/client_channel/client_channel_plugin.c b/src/core/ext/filters/client_channel/client_channel_plugin.c
index c32e83d012..1f71c5a7f9 100644
--- a/src/core/ext/filters/client_channel/client_channel_plugin.c
+++ b/src/core/ext/filters/client_channel/client_channel_plugin.c
@@ -54,8 +54,8 @@ 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));
   if (default_authority != NULL) {
-    grpc_arg arg = grpc_channel_arg_string_create(GRPC_ARG_DEFAULT_AUTHORITY,
-                                                  default_authority);
+    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);
diff --git a/src/core/ext/filters/client_channel/http_proxy.c b/src/core/ext/filters/client_channel/http_proxy.c
index ef3512ed83..c507a2750e 100644
--- a/src/core/ext/filters/client_channel/http_proxy.c
+++ b/src/core/ext/filters/client_channel/http_proxy.c
@@ -44,6 +44,8 @@ static char* get_http_proxy_server(grpc_exec_ctx* exec_ctx, char** user_cred) {
   GPR_ASSERT(user_cred != NULL);
   char* proxy_name = NULL;
   char* uri_str = gpr_getenv("http_proxy");
+  char** authority_strs = NULL;
+  size_t authority_nstrs;
   if (uri_str == NULL) return NULL;
   grpc_uri* uri =
       grpc_uri_parse(exec_ctx, uri_str, false /* suppress_errors */);
@@ -56,8 +58,6 @@ static char* get_http_proxy_server(grpc_exec_ctx* exec_ctx, char** user_cred) {
     goto done;
   }
   /* Split on '@' to separate user credentials from host */
-  char** authority_strs = NULL;
-  size_t authority_nstrs;
   gpr_string_split(uri->authority, "@", &authority_strs, &authority_nstrs);
   GPR_ASSERT(authority_nstrs != 0); /* should have at least 1 string */
   if (authority_nstrs == 1) {
@@ -157,7 +157,7 @@ static bool proxy_mapper_map_name(grpc_exec_ctx* exec_ctx,
   }
   grpc_arg args_to_add[2];
   args_to_add[0] = grpc_channel_arg_string_create(
-      GRPC_ARG_HTTP_CONNECT_SERVER,
+      (char*)GRPC_ARG_HTTP_CONNECT_SERVER,
       uri->path[0] == '/' ? uri->path + 1 : uri->path);
   if (user_cred != NULL) {
     /* Use base64 encoding for user credentials as stated in RFC 7617 */
@@ -166,8 +166,8 @@ static bool proxy_mapper_map_name(grpc_exec_ctx* exec_ctx,
     char* header;
     gpr_asprintf(&header, "Proxy-Authorization:Basic %s", encoded_user_cred);
     gpr_free(encoded_user_cred);
-    args_to_add[1] =
-        grpc_channel_arg_string_create(GRPC_ARG_HTTP_CONNECT_HEADERS, header);
+    args_to_add[1] = grpc_channel_arg_string_create(
+        (char*)GRPC_ARG_HTTP_CONNECT_HEADERS, header);
     *new_args = grpc_channel_args_copy_and_add(args, args_to_add, 2);
     gpr_free(header);
   } else {
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.c b/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.c
index bd290464c8..7ad322902b 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.c
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.c
@@ -75,7 +75,8 @@ static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx,
   GPR_ASSERT(args->context != NULL);
   GPR_ASSERT(args->context[GRPC_GRPCLB_CLIENT_STATS].value != NULL);
   calld->client_stats = grpc_grpclb_client_stats_ref(
-      args->context[GRPC_GRPCLB_CLIENT_STATS].value);
+      (grpc_grpclb_client_stats *)args->context[GRPC_GRPCLB_CLIENT_STATS]
+          .value);
   // Record call started.
   grpc_grpclb_client_stats_add_call_started(calld->client_stats);
   return GRPC_ERROR_NONE;
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c
index 5aafed1374..85ef7894ea 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c
@@ -101,6 +101,7 @@
 #include "src/core/ext/filters/client_channel/lb_policy_registry.h"
 #include "src/core/ext/filters/client_channel/parse_address.h"
 #include "src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h"
+#include "src/core/ext/filters/client_channel/subchannel_index.h"
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/channel_stack.h"
 #include "src/core/lib/iomgr/combiner.h"
@@ -137,7 +138,7 @@ static grpc_error *initial_metadata_add_lb_token(
 }
 
 static void destroy_client_stats(void *arg) {
-  grpc_grpclb_client_stats_unref(arg);
+  grpc_grpclb_client_stats_unref((grpc_grpclb_client_stats *)arg);
 }
 
 typedef struct wrapped_rr_closure_arg {
@@ -285,7 +286,7 @@ static void add_pending_ping(pending_ping **root, grpc_closure *notify) {
  * glb_lb_policy
  */
 typedef struct rr_connectivity_data rr_connectivity_data;
-static const grpc_lb_policy_vtable glb_lb_policy_vtable;
+
 typedef struct glb_lb_policy {
   /** base policy: must be first */
   grpc_lb_policy base;
@@ -727,7 +728,7 @@ static void create_rr_locked(grpc_exec_ctx *exec_ctx, glb_lb_policy *glb_policy,
   /* Allocate the data for the tracking of the new RR policy's connectivity.
    * It'll be deallocated in glb_rr_connectivity_changed() */
   rr_connectivity_data *rr_connectivity =
-      gpr_zalloc(sizeof(rr_connectivity_data));
+      (rr_connectivity_data *)gpr_zalloc(sizeof(rr_connectivity_data));
   GRPC_CLOSURE_INIT(&rr_connectivity->on_change,
                     glb_rr_connectivity_changed_locked, rr_connectivity,
                     grpc_combiner_scheduler(glb_policy->base.combiner));
@@ -869,7 +870,8 @@ static grpc_channel_args *build_lb_channel_args(
   grpc_lb_addresses *lb_addresses =
       grpc_lb_addresses_create(num_grpclb_addrs, NULL);
   grpc_slice_hash_table_entry *targets_info_entries =
-      gpr_zalloc(sizeof(*targets_info_entries) * num_grpclb_addrs);
+      (grpc_slice_hash_table_entry *)gpr_zalloc(sizeof(*targets_info_entries) *
+                                                num_grpclb_addrs);
 
   size_t lb_addresses_idx = 0;
   for (size_t i = 0; i < addresses->num_addresses; ++i) {
@@ -911,92 +913,6 @@ static grpc_channel_args *build_lb_channel_args(
   return result;
 }
 
-static void glb_lb_channel_on_connectivity_changed_cb(grpc_exec_ctx *exec_ctx,
-                                                      void *arg,
-                                                      grpc_error *error);
-static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx,
-                                  grpc_lb_policy_factory *factory,
-                                  grpc_lb_policy_args *args) {
-  /* Count the number of gRPC-LB addresses. There must be at least one.
-   * TODO(roth): For now, we ignore non-balancer addresses, but in the
-   * future, we may change the behavior such that we fall back to using
-   * the non-balancer addresses if we cannot reach any balancers. In the
-   * fallback case, we should use the LB policy indicated by
-   * GRPC_ARG_LB_POLICY_NAME (although if that specifies grpclb or is
-   * unset, we should default to pick_first). */
-  const grpc_arg *arg =
-      grpc_channel_args_find(args->args, GRPC_ARG_LB_ADDRESSES);
-  if (arg == NULL || arg->type != GRPC_ARG_POINTER) {
-    return NULL;
-  }
-  grpc_lb_addresses *addresses = (grpc_lb_addresses *)arg->value.pointer.p;
-  size_t num_grpclb_addrs = 0;
-  for (size_t i = 0; i < addresses->num_addresses; ++i) {
-    if (addresses->addresses[i].is_balancer) ++num_grpclb_addrs;
-  }
-  if (num_grpclb_addrs == 0) return NULL;
-
-  glb_lb_policy *glb_policy = (glb_lb_policy *)gpr_zalloc(sizeof(*glb_policy));
-
-  /* Get server name. */
-  arg = grpc_channel_args_find(args->args, GRPC_ARG_SERVER_URI);
-  GPR_ASSERT(arg != NULL);
-  GPR_ASSERT(arg->type == GRPC_ARG_STRING);
-  grpc_uri *uri = grpc_uri_parse(exec_ctx, arg->value.string, true);
-  GPR_ASSERT(uri->path[0] != '\0');
-  glb_policy->server_name =
-      gpr_strdup(uri->path[0] == '/' ? uri->path + 1 : uri->path);
-  if (GRPC_TRACER_ON(grpc_lb_glb_trace)) {
-    gpr_log(GPR_INFO, "Will use '%s' as the server name for LB request.",
-            glb_policy->server_name);
-  }
-  grpc_uri_destroy(uri);
-
-  glb_policy->cc_factory = args->client_channel_factory;
-  GPR_ASSERT(glb_policy->cc_factory != NULL);
-
-  arg = grpc_channel_args_find(args->args, GRPC_ARG_GRPCLB_CALL_TIMEOUT_MS);
-  glb_policy->lb_call_timeout_ms =
-      grpc_channel_arg_get_integer(arg, (grpc_integer_options){0, 0, INT_MAX});
-
-  // Make sure that GRPC_ARG_LB_POLICY_NAME is set in channel args,
-  // since we use this to trigger the client_load_reporting filter.
-  grpc_arg new_arg =
-      grpc_channel_arg_string_create(GRPC_ARG_LB_POLICY_NAME, "grpclb");
-  static const char *args_to_remove[] = {GRPC_ARG_LB_POLICY_NAME};
-  glb_policy->args = grpc_channel_args_copy_and_add_and_remove(
-      args->args, args_to_remove, GPR_ARRAY_SIZE(args_to_remove), &new_arg, 1);
-
-  /* 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);
-  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);
-
-  /* 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);
-  gpr_free(uri_str);
-  if (glb_policy->lb_channel == NULL) {
-    gpr_free((void *)glb_policy->server_name);
-    grpc_channel_args_destroy(exec_ctx, glb_policy->args);
-    gpr_free(glb_policy);
-    return NULL;
-  }
-  GRPC_CLOSURE_INIT(&glb_policy->lb_channel_on_connectivity_changed,
-                    glb_lb_channel_on_connectivity_changed_cb, glb_policy,
-                    grpc_combiner_scheduler(args->combiner));
-  grpc_lb_policy_init(&glb_policy->base, &glb_lb_policy_vtable, args->combiner);
-  grpc_connectivity_state_init(&glb_policy->state_tracker, GRPC_CHANNEL_IDLE,
-                               "grpclb");
-  return &glb_policy->base;
-}
-
 static void glb_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   glb_lb_policy *glb_policy = (glb_lb_policy *)pol;
   GPR_ASSERT(glb_policy->pending_picks == NULL);
@@ -1011,6 +927,7 @@ static void glb_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
     grpc_grpclb_destroy_serverlist(glb_policy->serverlist);
   }
   grpc_fake_resolver_response_generator_unref(glb_policy->response_generator);
+  grpc_subchannel_index_unref();
   if (glb_policy->pending_update_args != NULL) {
     grpc_channel_args_destroy(exec_ctx, glb_policy->pending_update_args->args);
     gpr_free(glb_policy->pending_update_args);
@@ -1303,7 +1220,8 @@ static void do_send_client_load_report_locked(grpc_exec_ctx *exec_ctx,
 
 static bool load_report_counters_are_zero(grpc_grpclb_request *request) {
   grpc_grpclb_dropped_call_counts *drop_entries =
-      request->client_stats.calls_finished_with_drop.arg;
+      (grpc_grpclb_dropped_call_counts *)
+          request->client_stats.calls_finished_with_drop.arg;
   return request->client_stats.num_calls_started == 0 &&
          request->client_stats.num_calls_finished == 0 &&
          request->client_stats.num_calls_finished_with_client_failed_to_send ==
@@ -1642,6 +1560,9 @@ static void lb_on_response_received_locked(grpc_exec_ctx *exec_ctx, void *arg,
           exec_ctx, 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,
+                                "lb_on_response_received_locked_shutdown");
     }
   } else { /* empty payload: call cancelled. */
            /* dispose of the "lb_on_response_received_locked" weak ref taken in
@@ -1865,6 +1786,90 @@ static const grpc_lb_policy_vtable glb_lb_policy_vtable = {
     glb_notify_on_state_change_locked,
     glb_update_locked};
 
+static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx,
+                                  grpc_lb_policy_factory *factory,
+                                  grpc_lb_policy_args *args) {
+  /* Count the number of gRPC-LB addresses. There must be at least one.
+   * TODO(roth): For now, we ignore non-balancer addresses, but in the
+   * future, we may change the behavior such that we fall back to using
+   * the non-balancer addresses if we cannot reach any balancers. In the
+   * fallback case, we should use the LB policy indicated by
+   * GRPC_ARG_LB_POLICY_NAME (although if that specifies grpclb or is
+   * unset, we should default to pick_first). */
+  const grpc_arg *arg =
+      grpc_channel_args_find(args->args, GRPC_ARG_LB_ADDRESSES);
+  if (arg == NULL || arg->type != GRPC_ARG_POINTER) {
+    return NULL;
+  }
+  grpc_lb_addresses *addresses = (grpc_lb_addresses *)arg->value.pointer.p;
+  size_t num_grpclb_addrs = 0;
+  for (size_t i = 0; i < addresses->num_addresses; ++i) {
+    if (addresses->addresses[i].is_balancer) ++num_grpclb_addrs;
+  }
+  if (num_grpclb_addrs == 0) return NULL;
+
+  glb_lb_policy *glb_policy = (glb_lb_policy *)gpr_zalloc(sizeof(*glb_policy));
+
+  /* Get server name. */
+  arg = grpc_channel_args_find(args->args, GRPC_ARG_SERVER_URI);
+  GPR_ASSERT(arg != NULL);
+  GPR_ASSERT(arg->type == GRPC_ARG_STRING);
+  grpc_uri *uri = grpc_uri_parse(exec_ctx, arg->value.string, true);
+  GPR_ASSERT(uri->path[0] != '\0');
+  glb_policy->server_name =
+      gpr_strdup(uri->path[0] == '/' ? uri->path + 1 : uri->path);
+  if (GRPC_TRACER_ON(grpc_lb_glb_trace)) {
+    gpr_log(GPR_INFO, "Will use '%s' as the server name for LB request.",
+            glb_policy->server_name);
+  }
+  grpc_uri_destroy(uri);
+
+  glb_policy->cc_factory = args->client_channel_factory;
+  GPR_ASSERT(glb_policy->cc_factory != NULL);
+
+  arg = grpc_channel_args_find(args->args, GRPC_ARG_GRPCLB_CALL_TIMEOUT_MS);
+  glb_policy->lb_call_timeout_ms =
+      grpc_channel_arg_get_integer(arg, (grpc_integer_options){0, 0, INT_MAX});
+
+  // Make sure that GRPC_ARG_LB_POLICY_NAME is set in channel args,
+  // since we use this to trigger the client_load_reporting filter.
+  grpc_arg new_arg = grpc_channel_arg_string_create(
+      (char *)GRPC_ARG_LB_POLICY_NAME, (char *)"grpclb");
+  static const char *args_to_remove[] = {GRPC_ARG_LB_POLICY_NAME};
+  glb_policy->args = grpc_channel_args_copy_and_add_and_remove(
+      args->args, args_to_remove, GPR_ARRAY_SIZE(args_to_remove), &new_arg, 1);
+
+  /* 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);
+  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);
+
+  /* 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);
+  gpr_free(uri_str);
+  if (glb_policy->lb_channel == NULL) {
+    gpr_free((void *)glb_policy->server_name);
+    grpc_channel_args_destroy(exec_ctx, glb_policy->args);
+    gpr_free(glb_policy);
+    return NULL;
+  }
+  grpc_subchannel_index_ref();
+  GRPC_CLOSURE_INIT(&glb_policy->lb_channel_on_connectivity_changed,
+                    glb_lb_channel_on_connectivity_changed_cb, glb_policy,
+                    grpc_combiner_scheduler(args->combiner));
+  grpc_lb_policy_init(&glb_policy->base, &glb_lb_policy_vtable, args->combiner);
+  grpc_connectivity_state_init(&glb_policy->state_tracker, GRPC_CHANNEL_IDLE,
+                               "grpclb");
+  return &glb_policy->base;
+}
+
 static void glb_factory_ref(grpc_lb_policy_factory *factory) {}
 
 static void glb_factory_unref(grpc_lb_policy_factory *factory) {}
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.c b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.c
index 407bd18adb..8ef6dfc6f4 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.c
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.c
@@ -148,7 +148,8 @@ grpc_slice grpc_grpclb_request_encode(const grpc_grpclb_request *request) {
 void grpc_grpclb_request_destroy(grpc_grpclb_request *request) {
   if (request->has_client_stats) {
     grpc_grpclb_dropped_call_counts *drop_entries =
-        request->client_stats.calls_finished_with_drop.arg;
+        (grpc_grpclb_dropped_call_counts *)
+            request->client_stats.calls_finished_with_drop.arg;
     grpc_grpclb_dropped_call_counts_destroy(drop_entries);
   }
   gpr_free(request);
@@ -170,7 +171,8 @@ grpc_grpclb_initial_response *grpc_grpclb_initial_response_parse(
   if (!res.has_initial_response) return NULL;
 
   grpc_grpclb_initial_response *initial_res =
-      gpr_malloc(sizeof(grpc_grpclb_initial_response));
+      (grpc_grpclb_initial_response *)gpr_malloc(
+          sizeof(grpc_grpclb_initial_response));
   memcpy(initial_res, &res.initial_response,
          sizeof(grpc_grpclb_initial_response));
 
diff --git a/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.c b/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.c
index fab3073eb9..d20cbb8388 100644
--- a/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.c
+++ b/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.c
@@ -89,6 +89,7 @@ static void pf_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
                                     "picked_first_destroy");
   }
   grpc_connectivity_state_destroy(exec_ctx, &p->state_tracker);
+  grpc_subchannel_index_unref();
   if (p->pending_update_args != NULL) {
     grpc_channel_args_destroy(exec_ctx, p->pending_update_args->args);
     gpr_free(p->pending_update_args);
@@ -330,8 +331,8 @@ static void pf_update_locked(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
     gpr_log(GPR_INFO, "Pick First %p received update with %lu addresses",
             (void *)p, (unsigned long)addresses->num_addresses);
   }
-  grpc_subchannel_args *sc_args =
-      gpr_zalloc(sizeof(*sc_args) * addresses->num_addresses);
+  grpc_subchannel_args *sc_args = (grpc_subchannel_args *)gpr_zalloc(
+      sizeof(*sc_args) * addresses->num_addresses);
   /* We remove the following keys in order for subchannel keys belonging to
    * subchannels point to the same address to match. */
   static const char *keys_to_remove[] = {GRPC_ARG_SUBCHANNEL_ADDRESS,
@@ -403,7 +404,7 @@ static void pf_update_locked(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
   }
   /* Create the subchannels for the new subchannel args/addresses. */
   grpc_subchannel **new_subchannels =
-      gpr_zalloc(sizeof(*new_subchannels) * sc_args_count);
+      (grpc_subchannel **)gpr_zalloc(sizeof(*new_subchannels) * sc_args_count);
   size_t num_new_subchannels = 0;
   for (size_t i = 0; i < sc_args_count; i++) {
     grpc_subchannel *subchannel = grpc_client_channel_factory_create_subchannel(
@@ -686,6 +687,7 @@ static grpc_lb_policy *create_pick_first(grpc_exec_ctx *exec_ctx,
   }
   pf_update_locked(exec_ctx, &p->base, args);
   grpc_lb_policy_init(&p->base, &pick_first_lb_policy_vtable, args->combiner);
+  grpc_subchannel_index_ref();
   GRPC_CLOSURE_INIT(&p->connectivity_changed, pf_connectivity_changed_locked, p,
                     grpc_combiner_scheduler(args->combiner));
   return &p->base;
diff --git a/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.c b/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.c
index be91d3d651..a3a62e9f3c 100644
--- a/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.c
+++ b/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.c
@@ -30,6 +30,7 @@
 
 #include "src/core/ext/filters/client_channel/lb_policy_registry.h"
 #include "src/core/ext/filters/client_channel/subchannel.h"
+#include "src/core/ext/filters/client_channel/subchannel_index.h"
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/debug/trace.h"
 #include "src/core/lib/iomgr/combiner.h"
@@ -310,6 +311,7 @@ static void rr_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
             (void *)pol, (void *)pol);
   }
   grpc_connectivity_state_destroy(exec_ctx, &p->state_tracker);
+  grpc_subchannel_index_unref();
   gpr_free(p);
 }
 
@@ -587,7 +589,7 @@ static void rr_connectivity_changed_locked(grpc_exec_ctx *exec_ctx, void *arg,
   // Dispose of outdated subchannel lists.
   if (sd->subchannel_list != p->subchannel_list &&
       sd->subchannel_list != p->latest_pending_subchannel_list) {
-    char *reason = NULL;
+    const char *reason = NULL;
     if (sd->subchannel_list->shutting_down) {
       reason = "sl_outdated_straggler";
       rr_subchannel_list_unref(exec_ctx, sd->subchannel_list, reason);
@@ -890,6 +892,7 @@ static grpc_lb_policy *round_robin_create(grpc_exec_ctx *exec_ctx,
   GPR_ASSERT(args->client_channel_factory != NULL);
   round_robin_lb_policy *p = (round_robin_lb_policy *)gpr_zalloc(sizeof(*p));
   grpc_lb_policy_init(&p->base, &round_robin_lb_policy_vtable, args->combiner);
+  grpc_subchannel_index_ref();
   grpc_connectivity_state_init(&p->state_tracker, GRPC_CHANNEL_IDLE,
                                "round_robin");
   rr_update_locked(exec_ctx, &p->base, args);
diff --git a/src/core/ext/filters/client_channel/lb_policy_factory.c b/src/core/ext/filters/client_channel/lb_policy_factory.c
index cdcaf17544..4d1405454c 100644
--- a/src/core/ext/filters/client_channel/lb_policy_factory.c
+++ b/src/core/ext/filters/client_channel/lb_policy_factory.c
@@ -126,13 +126,14 @@ void grpc_lb_addresses_destroy(grpc_exec_ctx* exec_ctx,
 }
 
 static void* lb_addresses_copy(void* addresses) {
-  return grpc_lb_addresses_copy(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, addresses);
+  grpc_lb_addresses_destroy(exec_ctx, (grpc_lb_addresses*)addresses);
 }
 static int lb_addresses_cmp(void* addresses1, void* addresses2) {
-  return grpc_lb_addresses_cmp(addresses1, addresses2);
+  return grpc_lb_addresses_cmp((grpc_lb_addresses*)addresses1,
+                               (grpc_lb_addresses*)addresses2);
 }
 static const grpc_arg_pointer_vtable lb_addresses_arg_vtable = {
     lb_addresses_copy, lb_addresses_destroy, lb_addresses_cmp};
@@ -140,7 +141,7 @@ static const grpc_arg_pointer_vtable lb_addresses_arg_vtable = {
 grpc_arg grpc_lb_addresses_create_channel_arg(
     const grpc_lb_addresses* addresses) {
   return grpc_channel_arg_pointer_create(
-      GRPC_ARG_LB_ADDRESSES, (void*)addresses, &lb_addresses_arg_vtable);
+      (char*)GRPC_ARG_LB_ADDRESSES, (void*)addresses, &lb_addresses_arg_vtable);
 }
 
 grpc_lb_addresses* grpc_lb_addresses_find_channel_arg(
@@ -149,7 +150,7 @@ grpc_lb_addresses* grpc_lb_addresses_find_channel_arg(
       grpc_channel_args_find(channel_args, GRPC_ARG_LB_ADDRESSES);
   if (lb_addresses_arg == NULL || lb_addresses_arg->type != GRPC_ARG_POINTER)
     return NULL;
-  return lb_addresses_arg->value.pointer.p;
+  return (grpc_lb_addresses*)lb_addresses_arg->value.pointer.p;
 }
 
 void grpc_lb_policy_factory_ref(grpc_lb_policy_factory* factory) {
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.c b/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.c
index b87a3b7082..9bb229ad95 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.c
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.c
@@ -204,7 +204,7 @@ static char *choose_service_config(char *service_config_choice_json) {
         int random_pct = rand() % 100;
         int percentage;
         if (sscanf(field->value, "%d", &percentage) != 1 ||
-            random_pct > percentage) {
+            random_pct > percentage || percentage == 0) {
           service_config_json = NULL;
           break;
         }
@@ -249,7 +249,7 @@ static void dns_ares_on_resolved_locked(grpc_exec_ctx *exec_ctx, void *arg,
                 service_config_string);
         args_to_remove[num_args_to_remove++] = GRPC_ARG_SERVICE_CONFIG;
         new_args[num_args_to_add++] = grpc_channel_arg_string_create(
-            GRPC_ARG_SERVICE_CONFIG, service_config_string);
+            (char *)GRPC_ARG_SERVICE_CONFIG, service_config_string);
         service_config = grpc_service_config_create(service_config_string);
         if (service_config != NULL) {
           const char *lb_policy_name =
@@ -257,7 +257,7 @@ static void dns_ares_on_resolved_locked(grpc_exec_ctx *exec_ctx, void *arg,
           if (lb_policy_name != NULL) {
             args_to_remove[num_args_to_remove++] = GRPC_ARG_LB_POLICY_NAME;
             new_args[num_args_to_add++] = grpc_channel_arg_string_create(
-                GRPC_ARG_LB_POLICY_NAME, (char *)lb_policy_name);
+                (char *)GRPC_ARG_LB_POLICY_NAME, (char *)lb_policy_name);
           }
         }
       }
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c
index 9747d39a16..c30cc93b6f 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c
@@ -20,6 +20,7 @@
 #if GRPC_ARES == 1 && defined(GRPC_POSIX_SOCKET)
 
 #include <ares.h>
+#include <sys/ioctl.h>
 
 #include "src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h"
 
@@ -37,8 +38,6 @@
 typedef struct fd_node {
   /** the owner of this fd node */
   grpc_ares_ev_driver *ev_driver;
-  /** the grpc_fd owned by this fd node */
-  grpc_fd *grpc_fd;
   /** a closure wrapping on_readable_cb, which should be invoked when the
       grpc_fd in this node becomes readable. */
   grpc_closure read_closure;
@@ -50,10 +49,14 @@ typedef struct fd_node {
 
   /** mutex guarding the rest of the state */
   gpr_mu mu;
+  /** the grpc_fd owned by this fd node */
+  grpc_fd *fd;
   /** if the readable closure has been registered */
   bool readable_registered;
   /** if the writable closure has been registered */
   bool writable_registered;
+  /** if the fd is being shut down */
+  bool shutting_down;
 } fd_node;
 
 struct grpc_ares_ev_driver {
@@ -96,19 +99,31 @@ 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) {
-  gpr_log(GPR_DEBUG, "delete fd: %d", grpc_fd_wrapped_fd(fdn->grpc_fd));
+  gpr_log(GPR_DEBUG, "delete fd: %d", grpc_fd_wrapped_fd(fdn->fd));
   GPR_ASSERT(!fdn->readable_registered);
   GPR_ASSERT(!fdn->writable_registered);
   gpr_mu_destroy(&fdn->mu);
-  grpc_pollset_set_del_fd(exec_ctx, fdn->ev_driver->pollset_set, fdn->grpc_fd);
   /* 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->grpc_fd, NULL, NULL, true /* already_closed */,
+  grpc_fd_orphan(exec_ctx, fdn->fd, NULL, NULL, true /* already_closed */,
                  "c-ares query finished");
   gpr_free(fdn);
 }
 
+static void fd_node_shutdown(grpc_exec_ctx *exec_ctx, 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);
+  } else {
+    grpc_fd_shutdown(exec_ctx, fdn->fd, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                            "c-ares fd shutdown"));
+    gpr_mu_unlock(&fdn->mu);
+  }
+}
+
 grpc_error *grpc_ares_ev_driver_create(grpc_ares_ev_driver **ev_driver,
                                        grpc_pollset_set *pollset_set) {
   *ev_driver = (grpc_ares_ev_driver *)gpr_malloc(sizeof(grpc_ares_ev_driver));
@@ -150,9 +165,8 @@ void grpc_ares_ev_driver_shutdown(grpc_exec_ctx *exec_ctx,
   ev_driver->shutting_down = true;
   fd_node *fn = ev_driver->fds;
   while (fn != NULL) {
-    grpc_fd_shutdown(
-        exec_ctx, fn->grpc_fd,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("grpc_ares_ev_driver_shutdown"));
+    grpc_fd_shutdown(exec_ctx, fn->fd, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                           "grpc_ares_ev_driver_shutdown"));
     fn = fn->next;
   }
   gpr_mu_unlock(&ev_driver->mu);
@@ -165,7 +179,7 @@ static fd_node *pop_fd_node(fd_node **head, int fd) {
   dummy_head.next = *head;
   fd_node *node = &dummy_head;
   while (node->next != NULL) {
-    if (grpc_fd_wrapped_fd(node->next->grpc_fd) == fd) {
+    if (grpc_fd_wrapped_fd(node->next->fd) == fd) {
       fd_node *ret = node->next;
       node->next = node->next->next;
       *head = dummy_head.next;
@@ -176,18 +190,33 @@ static fd_node *pop_fd_node(fd_node **head, int fd) {
   return NULL;
 }
 
+/* Check if \a fd is still readable */
+static bool grpc_ares_is_fd_still_readable(grpc_ares_ev_driver *ev_driver,
+                                           int fd) {
+  size_t bytes_available = 0;
+  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) {
   fd_node *fdn = (fd_node *)arg;
   grpc_ares_ev_driver *ev_driver = fdn->ev_driver;
   gpr_mu_lock(&fdn->mu);
+  const int fd = grpc_fd_wrapped_fd(fdn->fd);
   fdn->readable_registered = false;
+  if (fdn->shutting_down && !fdn->writable_registered) {
+    gpr_mu_unlock(&fdn->mu);
+    fd_node_destroy(exec_ctx, fdn);
+    grpc_ares_ev_driver_unref(ev_driver);
+    return;
+  }
   gpr_mu_unlock(&fdn->mu);
 
-  gpr_log(GPR_DEBUG, "readable on %d", grpc_fd_wrapped_fd(fdn->grpc_fd));
+  gpr_log(GPR_DEBUG, "readable on %d", fd);
   if (error == GRPC_ERROR_NONE) {
-    ares_process_fd(ev_driver->channel, grpc_fd_wrapped_fd(fdn->grpc_fd),
-                    ARES_SOCKET_BAD);
+    do {
+      ares_process_fd(ev_driver->channel, fd, ARES_SOCKET_BAD);
+    } while (grpc_ares_is_fd_still_readable(ev_driver, fd));
   } else {
     // If error is not GRPC_ERROR_NONE, it means the fd has been shutdown or
     // timed out. The pending lookups made on this ev_driver will be cancelled
@@ -208,13 +237,19 @@ static void on_writable_cb(grpc_exec_ctx *exec_ctx, void *arg,
   fd_node *fdn = (fd_node *)arg;
   grpc_ares_ev_driver *ev_driver = fdn->ev_driver;
   gpr_mu_lock(&fdn->mu);
+  const int fd = grpc_fd_wrapped_fd(fdn->fd);
   fdn->writable_registered = false;
+  if (fdn->shutting_down && !fdn->readable_registered) {
+    gpr_mu_unlock(&fdn->mu);
+    fd_node_destroy(exec_ctx, fdn);
+    grpc_ares_ev_driver_unref(ev_driver);
+    return;
+  }
   gpr_mu_unlock(&fdn->mu);
 
-  gpr_log(GPR_DEBUG, "writable on %d", grpc_fd_wrapped_fd(fdn->grpc_fd));
+  gpr_log(GPR_DEBUG, "writable on %d", fd);
   if (error == GRPC_ERROR_NONE) {
-    ares_process_fd(ev_driver->channel, ARES_SOCKET_BAD,
-                    grpc_fd_wrapped_fd(fdn->grpc_fd));
+    ares_process_fd(ev_driver->channel, ARES_SOCKET_BAD, fd);
   } else {
     // If error is not GRPC_ERROR_NONE, it means the fd has been shutdown or
     // timed out. The pending lookups made on this ev_driver will be cancelled
@@ -253,17 +288,17 @@ static void grpc_ares_notify_on_event_locked(grpc_exec_ctx *exec_ctx,
           gpr_asprintf(&fd_name, "ares_ev_driver-%" PRIuPTR, i);
           fdn = (fd_node *)gpr_malloc(sizeof(fd_node));
           gpr_log(GPR_DEBUG, "new fd: %d", socks[i]);
-          fdn->grpc_fd = grpc_fd_create(socks[i], fd_name);
+          fdn->fd = grpc_fd_create(socks[i], fd_name);
           fdn->ev_driver = ev_driver;
           fdn->readable_registered = false;
           fdn->writable_registered = false;
+          fdn->shutting_down = false;
           gpr_mu_init(&fdn->mu);
           GRPC_CLOSURE_INIT(&fdn->read_closure, on_readable_cb, fdn,
                             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->grpc_fd);
+          grpc_pollset_set_add_fd(exec_ctx, ev_driver->pollset_set, fdn->fd);
           gpr_free(fd_name);
         }
         fdn->next = new_list;
@@ -274,9 +309,8 @@ static void grpc_ares_notify_on_event_locked(grpc_exec_ctx *exec_ctx,
         if (ARES_GETSOCK_READABLE(socks_bitmask, i) &&
             !fdn->readable_registered) {
           grpc_ares_ev_driver_ref(ev_driver);
-          gpr_log(GPR_DEBUG, "notify read on: %d",
-                  grpc_fd_wrapped_fd(fdn->grpc_fd));
-          grpc_fd_notify_on_read(exec_ctx, fdn->grpc_fd, &fdn->read_closure);
+          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);
           fdn->readable_registered = true;
         }
         // Register write_closure if the socket is writable and write_closure
@@ -284,9 +318,9 @@ static void grpc_ares_notify_on_event_locked(grpc_exec_ctx *exec_ctx,
         if (ARES_GETSOCK_WRITABLE(socks_bitmask, i) &&
             !fdn->writable_registered) {
           gpr_log(GPR_DEBUG, "notify write on: %d",
-                  grpc_fd_wrapped_fd(fdn->grpc_fd));
+                  grpc_fd_wrapped_fd(fdn->fd));
           grpc_ares_ev_driver_ref(ev_driver);
-          grpc_fd_notify_on_write(exec_ctx, fdn->grpc_fd, &fdn->write_closure);
+          grpc_fd_notify_on_write(exec_ctx, fdn->fd, &fdn->write_closure);
           fdn->writable_registered = true;
         }
         gpr_mu_unlock(&fdn->mu);
@@ -299,7 +333,7 @@ static void grpc_ares_notify_on_event_locked(grpc_exec_ctx *exec_ctx,
   while (ev_driver->fds != NULL) {
     fd_node *cur = ev_driver->fds;
     ev_driver->fds = ev_driver->fds->next;
-    fd_node_destroy(exec_ctx, cur);
+    fd_node_shutdown(exec_ctx, cur);
   }
   ev_driver->fds = new_list;
   // If the ev driver has no working fd, all the tasks are done.
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.c b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.c
index 0d71f3560e..04379975e1 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.c
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.c
@@ -123,8 +123,8 @@ static void grpc_ares_request_unref(grpc_exec_ctx *exec_ctx,
 static grpc_ares_hostbyname_request *create_hostbyname_request(
     grpc_ares_request *parent_request, char *host, uint16_t port,
     bool is_balancer) {
-  grpc_ares_hostbyname_request *hr =
-      gpr_zalloc(sizeof(grpc_ares_hostbyname_request));
+  grpc_ares_hostbyname_request *hr = (grpc_ares_hostbyname_request *)gpr_zalloc(
+      sizeof(grpc_ares_hostbyname_request));
   hr->parent_request = parent_request;
   hr->host = gpr_strdup(host);
   hr->port = port;
@@ -174,7 +174,7 @@ static void on_hostbyname_done_cb(void *arg, int status, int timeouts,
           grpc_lb_addresses_set_address(
               *lb_addresses, i, &addr, addr_len,
               hr->is_balancer /* is_balancer */,
-              hr->is_balancer ? strdup(hr->host) : NULL /* balancer_name */,
+              hr->is_balancer ? hr->host : NULL /* balancer_name */,
               NULL /* user_data */);
           char output[INET6_ADDRSTRLEN];
           ares_inet_ntop(AF_INET6, &addr.sin6_addr, output, INET6_ADDRSTRLEN);
@@ -195,7 +195,7 @@ static void on_hostbyname_done_cb(void *arg, int status, int timeouts,
           grpc_lb_addresses_set_address(
               *lb_addresses, i, &addr, addr_len,
               hr->is_balancer /* is_balancer */,
-              hr->is_balancer ? strdup(hr->host) : NULL /* balancer_name */,
+              hr->is_balancer ? hr->host : NULL /* balancer_name */,
               NULL /* user_data */);
           char output[INET_ADDRSTRLEN];
           ares_inet_ntop(AF_INET, &addr.sin_addr, output, INET_ADDRSTRLEN);
@@ -275,14 +275,15 @@ static void on_txt_done_cb(void *arg, int status, int timeouts,
   gpr_log(GPR_DEBUG, "on_txt_done_cb");
   char *error_msg;
   grpc_ares_request *r = (grpc_ares_request *)arg;
+  const size_t prefix_len = sizeof(g_service_config_attribute_prefix) - 1;
+  struct ares_txt_ext *result = NULL;
+  struct ares_txt_ext *reply = NULL;
+  grpc_error *error = GRPC_ERROR_NONE;
   gpr_mu_lock(&r->mu);
   if (status != ARES_SUCCESS) goto fail;
-  struct ares_txt_ext *reply = NULL;
   status = ares_parse_txt_reply_ext(buf, len, &reply);
   if (status != ARES_SUCCESS) goto fail;
   // Find service config in TXT record.
-  const size_t prefix_len = sizeof(g_service_config_attribute_prefix) - 1;
-  struct ares_txt_ext *result;
   for (result = reply; result != NULL; result = result->next) {
     if (result->record_start &&
         memcmp(result->txt, g_service_config_attribute_prefix, prefix_len) ==
@@ -313,7 +314,7 @@ static void on_txt_done_cb(void *arg, int status, int timeouts,
 fail:
   gpr_asprintf(&error_msg, "C-ares TXT lookup status is not ARES_SUCCESS: %s",
                ares_strerror(status));
-  grpc_error *error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(error_msg);
+  error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(error_msg);
   gpr_free(error_msg);
   if (r->error == GRPC_ERROR_NONE) {
     r->error = error;
@@ -331,6 +332,9 @@ static grpc_ares_request *grpc_dns_lookup_ares_impl(
     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 = NULL;
+  grpc_ares_request *r = NULL;
+  ares_channel *channel = NULL;
   /* TODO(zyc): Enable tracing after #9603 is checked in */
   /* if (grpc_dns_trace) {
       gpr_log(GPR_DEBUG, "resolve_address (blocking): name=%s, default_port=%s",
@@ -360,8 +364,7 @@ static grpc_ares_request *grpc_dns_lookup_ares_impl(
   error = grpc_ares_ev_driver_create(&ev_driver, interested_parties);
   if (error != GRPC_ERROR_NONE) goto error_cleanup;
 
-  grpc_ares_request *r =
-      (grpc_ares_request *)gpr_zalloc(sizeof(grpc_ares_request));
+  r = (grpc_ares_request *)gpr_zalloc(sizeof(grpc_ares_request));
   gpr_mu_init(&r->mu);
   r->ev_driver = ev_driver;
   r->on_done = on_done;
@@ -369,7 +372,7 @@ static grpc_ares_request *grpc_dns_lookup_ares_impl(
   r->service_config_json_out = service_config_json;
   r->success = false;
   r->error = GRPC_ERROR_NONE;
-  ares_channel *channel = grpc_ares_ev_driver_get_channel(r->ev_driver);
+  channel = grpc_ares_ev_driver_get_channel(r->ev_driver);
 
   // If dns_server is specified, use it.
   if (dns_server != NULL) {
@@ -410,12 +413,12 @@ static grpc_ares_request *grpc_dns_lookup_ares_impl(
   }
   gpr_ref_init(&r->pending_queries, 1);
   if (grpc_ipv6_loopback_available()) {
-    grpc_ares_hostbyname_request *hr = create_hostbyname_request(
-        r, host, strhtons(port), false /* is_balancer */);
+    hr = create_hostbyname_request(r, host, strhtons(port),
+                                   false /* is_balancer */);
     ares_gethostbyname(*channel, hr->host, AF_INET6, on_hostbyname_done_cb, hr);
   }
-  grpc_ares_hostbyname_request *hr = create_hostbyname_request(
-      r, host, strhtons(port), false /* is_balancer */);
+  hr = create_hostbyname_request(r, host, strhtons(port),
+                                 false /* is_balancer */);
   ares_gethostbyname(*channel, hr->host, AF_INET, on_hostbyname_done_cb, hr);
   if (check_grpclb) {
     /* Query the SRV record */
@@ -527,7 +530,8 @@ static void grpc_resolve_address_ares_impl(grpc_exec_ctx *exec_ctx,
                                            grpc_closure *on_done,
                                            grpc_resolved_addresses **addrs) {
   grpc_resolve_address_ares_request *r =
-      gpr_zalloc(sizeof(grpc_resolve_address_ares_request));
+      (grpc_resolve_address_ares_request *)gpr_zalloc(
+          sizeof(grpc_resolve_address_ares_request));
   r->addrs_out = addrs;
   r->on_resolve_address_done = on_done;
   GRPC_CLOSURE_INIT(&r->on_dns_lookup_done, on_dns_lookup_done_cb, r,
diff --git a/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.c b/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.c
index c4676e0299..69ea440ae6 100644
--- a/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.c
+++ b/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.c
@@ -210,7 +210,7 @@ grpc_arg grpc_fake_resolver_response_generator_arg(
     grpc_fake_resolver_response_generator* generator) {
   grpc_arg arg;
   arg.type = GRPC_ARG_POINTER;
-  arg.key = GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR;
+  arg.key = (char*)GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR;
   arg.value.pointer.p = generator;
   arg.value.pointer.vtable = &response_generator_arg_vtable;
   return arg;
diff --git a/src/core/ext/filters/client_channel/retry_throttle.c b/src/core/ext/filters/client_channel/retry_throttle.c
index 6cd6654b6f..09dcade089 100644
--- a/src/core/ext/filters/client_channel/retry_throttle.c
+++ b/src/core/ext/filters/client_channel/retry_throttle.c
@@ -99,7 +99,7 @@ static grpc_server_retry_throttle_data* grpc_server_retry_throttle_data_create(
     int max_milli_tokens, int milli_token_ratio,
     grpc_server_retry_throttle_data* old_throttle_data) {
   grpc_server_retry_throttle_data* throttle_data =
-      gpr_malloc(sizeof(*throttle_data));
+      (grpc_server_retry_throttle_data*)gpr_malloc(sizeof(*throttle_data));
   memset(throttle_data, 0, sizeof(*throttle_data));
   gpr_ref_init(&throttle_data->refs, 1);
   throttle_data->max_milli_tokens = max_milli_tokens;
@@ -131,11 +131,11 @@ static grpc_server_retry_throttle_data* grpc_server_retry_throttle_data_create(
 //
 
 static void* copy_server_name(void* key, void* unused) {
-  return gpr_strdup(key);
+  return gpr_strdup((const char*)key);
 }
 
 static long compare_server_name(void* key1, void* key2, void* unused) {
-  return strcmp(key1, key2);
+  return strcmp((const char*)key1, (const char*)key2);
 }
 
 static void destroy_server_retry_throttle_data(void* value, void* unused) {
@@ -177,7 +177,8 @@ grpc_server_retry_throttle_data* grpc_retry_throttle_map_get_data_for_server(
     const char* server_name, int max_milli_tokens, int milli_token_ratio) {
   gpr_mu_lock(&g_mu);
   grpc_server_retry_throttle_data* throttle_data =
-      gpr_avl_get(g_avl, (char*)server_name, NULL);
+      (grpc_server_retry_throttle_data*)gpr_avl_get(g_avl, (char*)server_name,
+                                                    NULL);
   if (throttle_data == NULL) {
     // Entry not found.  Create a new one.
     throttle_data = grpc_server_retry_throttle_data_create(
diff --git a/src/core/ext/filters/client_channel/subchannel.c b/src/core/ext/filters/client_channel/subchannel.c
index 05c55aaa89..40a51c72d6 100644
--- a/src/core/ext/filters/client_channel/subchannel.c
+++ b/src/core/ext/filters/client_channel/subchannel.c
@@ -32,6 +32,7 @@
 #include "src/core/ext/filters/client_channel/uri_parser.h"
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/connected_channel.h"
+#include "src/core/lib/debug/stats.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "src/core/lib/iomgr/timer.h"
 #include "src/core/lib/profiling/timers.h"
@@ -290,6 +291,7 @@ grpc_subchannel *grpc_subchannel_create(grpc_exec_ctx *exec_ctx,
     return c;
   }
 
+  GRPC_STATS_INC_CLIENT_SUBCHANNELS_CREATED(exec_ctx);
   c = (grpc_subchannel *)gpr_zalloc(sizeof(*c));
   c->key = key;
   gpr_atm_no_barrier_store(&c->ref_pair, 1 << INTERNAL_REF_BITS);
@@ -809,6 +811,6 @@ const char *grpc_get_subchannel_address_uri_arg(const grpc_channel_args *args) {
 
 grpc_arg grpc_create_subchannel_address_arg(const grpc_resolved_address *addr) {
   return grpc_channel_arg_string_create(
-      GRPC_ARG_SUBCHANNEL_ADDRESS,
+      (char *)GRPC_ARG_SUBCHANNEL_ADDRESS,
       addr->len > 0 ? grpc_sockaddr_to_uri(addr) : gpr_strdup(""));
 }
diff --git a/src/core/ext/filters/client_channel/subchannel_index.c b/src/core/ext/filters/client_channel/subchannel_index.c
index f57b631c41..d7a51f3899 100644
--- a/src/core/ext/filters/client_channel/subchannel_index.c
+++ b/src/core/ext/filters/client_channel/subchannel_index.c
@@ -34,6 +34,8 @@ static gpr_avl g_subchannel_index;
 
 static gpr_mu g_mu;
 
+static gpr_refcount g_refcount;
+
 struct grpc_subchannel_key {
   grpc_subchannel_args args;
 };
@@ -88,24 +90,26 @@ void grpc_subchannel_key_destroy(grpc_exec_ctx *exec_ctx,
 
 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, p);
+  grpc_subchannel_key_destroy(exec_ctx, (grpc_subchannel_key *)p);
 }
 
 static void *sck_avl_copy(void *p, void *unused) {
-  return subchannel_key_copy(p);
+  return subchannel_key_copy((grpc_subchannel_key *)p);
 }
 
 static long sck_avl_compare(void *a, void *b, void *unused) {
-  return grpc_subchannel_key_compare(a, b);
+  return grpc_subchannel_key_compare((grpc_subchannel_key *)a,
+                                     (grpc_subchannel_key *)b);
 }
 
 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, p, "subchannel_index");
+  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, (grpc_subchannel *)p,
+                             "subchannel_index");
 }
 
 static void *scv_avl_copy(void *p, void *unused) {
-  GRPC_SUBCHANNEL_WEAK_REF(p, "subchannel_index");
+  GRPC_SUBCHANNEL_WEAK_REF((grpc_subchannel *)p, "subchannel_index");
   return p;
 }
 
@@ -119,15 +123,27 @@ static const gpr_avl_vtable subchannel_avl_vtable = {
 void grpc_subchannel_index_init(void) {
   g_subchannel_index = gpr_avl_create(&subchannel_avl_vtable);
   gpr_mu_init(&g_mu);
+  gpr_ref_init(&g_refcount, 1);
 }
 
 void grpc_subchannel_index_shutdown(void) {
-  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);
+  // TODO(juanlishen): This refcounting mechanism may lead to memory leackage.
+  // To solve that, we should force polling to flush any pending callbacks, then
+  // shutdown safely.
+  grpc_subchannel_index_unref();
+}
+
+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);
+  }
 }
 
+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) {
   // Lock, and take a reference to the subchannel index.
diff --git a/src/core/ext/filters/client_channel/subchannel_index.h b/src/core/ext/filters/client_channel/subchannel_index.h
index 98d882a453..92e36d5283 100644
--- a/src/core/ext/filters/client_channel/subchannel_index.h
+++ b/src/core/ext/filters/client_channel/subchannel_index.h
@@ -59,6 +59,13 @@ void grpc_subchannel_index_init(void);
 /** Shutdown the subchannel index (global) */
 void grpc_subchannel_index_shutdown(void);
 
+/** Increment the refcount (non-zero) of subchannel index (global). */
+void grpc_subchannel_index_ref(void);
+
+/** Decrement the refcount of subchannel index (global). If the refcount drops
+    to zero, unref the subchannel index and destroy its mutex. */
+void grpc_subchannel_index_unref(void);
+
 /** \em TEST ONLY.
  * If \a force_creation is true, all key comparisons will be false, resulting in
  * new subchannels always being created. Otherwise, the keys will be compared as
diff --git a/src/core/ext/filters/http/message_compress/message_compress_filter.c b/src/core/ext/filters/http/message_compress/message_compress_filter.c
index a66916fbe1..f4c01f75a6 100644
--- a/src/core/ext/filters/http/message_compress/message_compress_filter.c
+++ b/src/core/ext/filters/http/message_compress/message_compress_filter.c
@@ -225,7 +225,7 @@ static void finish_send_message(grpc_exec_ctx *exec_ctx,
       exec_ctx, calld->message_compression_algorithm, &calld->slices, &tmp);
   if (did_compress) {
     if (GRPC_TRACER_ON(grpc_compression_trace)) {
-      char *algo_name;
+      const char *algo_name;
       const size_t before_size = calld->slices.length;
       const size_t after_size = tmp.length;
       const float savings_ratio = 1.0f - (float)after_size / (float)before_size;
@@ -239,7 +239,7 @@ static void finish_send_message(grpc_exec_ctx *exec_ctx,
     send_flags |= GRPC_WRITE_INTERNAL_COMPRESS;
   } else {
     if (GRPC_TRACER_ON(grpc_compression_trace)) {
-      char *algo_name;
+      const char *algo_name;
       GPR_ASSERT(grpc_message_compression_algorithm_name(
           calld->message_compression_algorithm, &algo_name));
       gpr_log(GPR_DEBUG,
diff --git a/src/core/ext/filters/http/server/http_server_filter.c b/src/core/ext/filters/http/server/http_server_filter.c
index 554a7f530d..03958136b4 100644
--- a/src/core/ext/filters/http/server/http_server_filter.c
+++ b/src/core/ext/filters/http/server/http_server_filter.c
@@ -83,12 +83,12 @@ static grpc_error *server_filter_outgoing_metadata(grpc_exec_ctx *exec_ctx,
 }
 
 static void add_error(const char *error_name, grpc_error **cumulative,
-                      grpc_error *new) {
-  if (new == GRPC_ERROR_NONE) return;
+                      grpc_error *new_err) {
+  if (new_err == GRPC_ERROR_NONE) return;
   if (*cumulative == GRPC_ERROR_NONE) {
     *cumulative = GRPC_ERROR_CREATE_FROM_COPIED_STRING(error_name);
   }
-  *cumulative = grpc_error_add_child(*cumulative, new);
+  *cumulative = grpc_error_add_child(*cumulative, new_err);
 }
 
 static grpc_error *server_filter_incoming_metadata(grpc_exec_ctx *exec_ctx,
diff --git a/src/core/ext/filters/load_reporting/server_load_reporting_plugin.c b/src/core/ext/filters/load_reporting/server_load_reporting_plugin.c
index f56afd27d2..2486ead427 100644
--- a/src/core/ext/filters/load_reporting/server_load_reporting_plugin.c
+++ b/src/core/ext/filters/load_reporting/server_load_reporting_plugin.c
@@ -55,7 +55,8 @@ static bool maybe_add_server_load_reporting_filter(
 }
 
 grpc_arg grpc_load_reporting_enable_arg() {
-  return grpc_channel_arg_integer_create(GRPC_ARG_ENABLE_LOAD_REPORTING, 1);
+  return grpc_channel_arg_integer_create((char *)GRPC_ARG_ENABLE_LOAD_REPORTING,
+                                         1);
 }
 
 /* Plugin registration */
diff --git a/src/core/ext/filters/max_age/max_age_filter.c b/src/core/ext/filters/max_age/max_age_filter.c
index 450f67746f..0ac803ed41 100644
--- a/src/core/ext/filters/max_age/max_age_filter.c
+++ b/src/core/ext/filters/max_age/max_age_filter.c
@@ -402,7 +402,7 @@ static bool maybe_add_max_age_filter(grpc_exec_ctx* exec_ctx,
   bool enable =
       grpc_channel_arg_get_integer(
           grpc_channel_args_find(channel_args, GRPC_ARG_MAX_CONNECTION_AGE_MS),
-          MAX_CONNECTION_AGE_INTEGER_OPTIONS) != INT_MAX &&
+          MAX_CONNECTION_AGE_INTEGER_OPTIONS) != INT_MAX ||
       grpc_channel_arg_get_integer(
           grpc_channel_args_find(channel_args, GRPC_ARG_MAX_CONNECTION_IDLE_MS),
           MAX_CONNECTION_IDLE_INTEGER_OPTIONS) != INT_MAX;
diff --git a/src/core/ext/transport/chttp2/client/chttp2_connector.c b/src/core/ext/transport/chttp2/client/chttp2_connector.c
index 0ec9353c04..202bcd47f5 100644
--- a/src/core/ext/transport/chttp2/client/chttp2_connector.c
+++ b/src/core/ext/transport/chttp2/client/chttp2_connector.c
@@ -161,7 +161,7 @@ static void connected(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
       grpc_endpoint_shutdown(exec_ctx, c->endpoint, GRPC_ERROR_REF(error));
     }
     gpr_mu_unlock(&c->mu);
-    chttp2_connector_unref(exec_ctx, arg);
+    chttp2_connector_unref(exec_ctx, (grpc_connector *)arg);
   } else {
     GPR_ASSERT(c->endpoint != NULL);
     start_handshake_locked(exec_ctx, c);
diff --git a/src/core/ext/transport/chttp2/client/insecure/channel_create.c b/src/core/ext/transport/chttp2/client/insecure/channel_create.c
index cccb347bf1..6410a6043d 100644
--- a/src/core/ext/transport/chttp2/client/insecure/channel_create.c
+++ b/src/core/ext/transport/chttp2/client/insecure/channel_create.c
@@ -55,7 +55,7 @@ static grpc_channel *client_channel_factory_create_channel(
   }
   // Add channel arg containing the server URI.
   grpc_arg arg = grpc_channel_arg_string_create(
-      GRPC_ARG_SERVER_URI,
+      (char *)GRPC_ARG_SERVER_URI,
       grpc_resolver_factory_add_default_prefix_if_needed(exec_ctx, target));
   const char *to_remove[] = {GRPC_ARG_SERVER_URI};
   grpc_channel_args *new_args =
diff --git a/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c b/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c
index 0346d50b6c..dd88136f7b 100644
--- a/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c
+++ b/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.c
@@ -42,7 +42,7 @@ grpc_channel *grpc_insecure_channel_create_from_fd(
                  (target, fd, args));
 
   grpc_arg default_authority_arg = grpc_channel_arg_string_create(
-      GRPC_ARG_DEFAULT_AUTHORITY, "test.authority");
+      (char *)GRPC_ARG_DEFAULT_AUTHORITY, (char *)"test.authority");
   grpc_channel_args *final_args =
       grpc_channel_args_copy_and_add(args, &default_authority_arg, 1);
 
diff --git a/src/core/ext/transport/chttp2/server/chttp2_server.c b/src/core/ext/transport/chttp2/server/chttp2_server.c
index d7add0538b..60244e163b 100644
--- a/src/core/ext/transport/chttp2/server/chttp2_server.c
+++ b/src/core/ext/transport/chttp2/server/chttp2_server.c
@@ -52,7 +52,7 @@ typedef struct {
 } server_state;
 
 typedef struct {
-  server_state *server_state;
+  server_state *svr_state;
   grpc_pollset *accepting_pollset;
   grpc_tcp_server_acceptor *acceptor;
   grpc_handshake_manager *handshake_mgr;
@@ -63,8 +63,8 @@ static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
   grpc_handshaker_args *args = (grpc_handshaker_args *)arg;
   server_connection_state *connection_state =
       (server_connection_state *)args->user_data;
-  gpr_mu_lock(&connection_state->server_state->mu);
-  if (error != GRPC_ERROR_NONE || connection_state->server_state->shutdown) {
+  gpr_mu_lock(&connection_state->svr_state->mu);
+  if (error != GRPC_ERROR_NONE || connection_state->svr_state->shutdown) {
     const char *error_str = grpc_error_string(error);
     gpr_log(GPR_DEBUG, "Handshaking failed: %s", error_str);
 
@@ -89,7 +89,7 @@ static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
       grpc_transport *transport =
           grpc_create_chttp2_transport(exec_ctx, args->args, args->endpoint, 0);
       grpc_server_setup_transport(
-          exec_ctx, connection_state->server_state->server, transport,
+          exec_ctx, connection_state->svr_state->server, transport,
           connection_state->accepting_pollset, args->args);
       grpc_chttp2_transport_start_reading(exec_ctx, transport,
                                           args->read_buffer);
@@ -97,11 +97,11 @@ static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
     }
   }
   grpc_handshake_manager_pending_list_remove(
-      &connection_state->server_state->pending_handshake_mgrs,
+      &connection_state->svr_state->pending_handshake_mgrs,
       connection_state->handshake_mgr);
-  gpr_mu_unlock(&connection_state->server_state->mu);
+  gpr_mu_unlock(&connection_state->svr_state->mu);
   grpc_handshake_manager_destroy(exec_ctx, connection_state->handshake_mgr);
-  grpc_tcp_server_unref(exec_ctx, connection_state->server_state->tcp_server);
+  grpc_tcp_server_unref(exec_ctx, connection_state->svr_state->tcp_server);
   gpr_free(connection_state->acceptor);
   gpr_free(connection_state);
 }
@@ -124,8 +124,8 @@ static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *tcp,
   gpr_mu_unlock(&state->mu);
   grpc_tcp_server_ref(state->tcp_server);
   server_connection_state *connection_state =
-      gpr_malloc(sizeof(*connection_state));
-  connection_state->server_state = state;
+      (server_connection_state *)gpr_malloc(sizeof(*connection_state));
+  connection_state->svr_state = state;
   connection_state->accepting_pollset = accepting_pollset;
   connection_state->acceptor = acceptor;
   connection_state->handshake_mgr = handshake_mgr;
@@ -201,6 +201,7 @@ grpc_error *grpc_chttp2_server_add_port(grpc_exec_ctx *exec_ctx,
   grpc_error *err = GRPC_ERROR_NONE;
   server_state *state = NULL;
   grpc_error **errors = NULL;
+  size_t naddrs = 0;
 
   *port_num = -1;
 
@@ -225,7 +226,7 @@ grpc_error *grpc_chttp2_server_add_port(grpc_exec_ctx *exec_ctx,
   state->shutdown = true;
   gpr_mu_init(&state->mu);
 
-  const size_t naddrs = resolved->naddrs;
+  naddrs = resolved->naddrs;
   errors = (grpc_error **)gpr_malloc(sizeof(*errors) * naddrs);
   for (i = 0; i < naddrs; i++) {
     errors[i] =
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_plugin.c b/src/core/ext/transport/chttp2/transport/chttp2_plugin.c
index 78551df9c3..6d09953830 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_plugin.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_plugin.c
@@ -23,6 +23,7 @@
 void grpc_chttp2_plugin_init(void) {
   grpc_register_tracer(&grpc_http_trace);
   grpc_register_tracer(&grpc_flowctl_trace);
+  grpc_register_tracer(&grpc_trace_http2_stream_state);
 #ifndef NDEBUG
   grpc_register_tracer(&grpc_trace_chttp2_refcount);
 #endif
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index 3fd701fe2f..acf49632ff 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -64,6 +64,11 @@
 #define DEFAULT_KEEPALIVE_PERMIT_WITHOUT_CALLS false
 #define KEEPALIVE_TIME_BACKOFF_MULTIPLIER 2
 
+#define DEFAULT_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS 300000 /* 5 minutes */
+#define DEFAULT_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS 300000 /* 5 minutes */
+#define DEFAULT_MAX_PINGS_BETWEEN_DATA 0                      /* unlimited */
+#define DEFAULT_MAX_PING_STRIKES 2
+
 static int g_default_client_keepalive_time_ms =
     DEFAULT_CLIENT_KEEPALIVE_TIME_MS;
 static int g_default_client_keepalive_timeout_ms =
@@ -75,6 +80,13 @@ static int g_default_server_keepalive_timeout_ms =
 static bool g_default_keepalive_permit_without_calls =
     DEFAULT_KEEPALIVE_PERMIT_WITHOUT_CALLS;
 
+static int g_default_min_sent_ping_interval_without_data_ms =
+    DEFAULT_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS;
+static int g_default_min_recv_ping_interval_without_data_ms =
+    DEFAULT_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS;
+static int g_default_max_pings_without_data = DEFAULT_MAX_PINGS_BETWEEN_DATA;
+static int g_default_max_ping_strikes = DEFAULT_MAX_PING_STRIKES;
+
 #define MAX_CLIENT_STREAM_ID 0x7fffffffu
 grpc_tracer_flag grpc_http_trace = GRPC_TRACER_INITIALIZER(false, "http");
 grpc_tracer_flag grpc_flowctl_trace = GRPC_TRACER_INITIALIZER(false, "flowctl");
@@ -144,18 +156,14 @@ static void finish_bdp_ping_locked(grpc_exec_ctx *exec_ctx, void *tp,
 
 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_ping_type ping_type,
-                             grpc_closure *on_initiate,
-                             grpc_closure *on_complete);
+static void send_ping_locked(
+    grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
+    grpc_chttp2_ping_type ping_type, grpc_closure *on_initiate,
+    grpc_closure *on_complete,
+    grpc_chttp2_initiate_write_reason initiate_write_reason);
 static void retry_initiate_ping_locked(grpc_exec_ctx *exec_ctx, void *tp,
                                        grpc_error *error);
 
-#define DEFAULT_MIN_TIME_BETWEEN_PINGS_MS 0
-#define DEFAULT_MAX_PINGS_BETWEEN_DATA 3
-#define DEFAULT_MAX_PING_STRIKES 2
-#define DEFAULT_MIN_PING_INTERVAL_WITHOUT_DATA_MS 300000 /* 5 minutes */
-
 /** keepalive-relevant functions */
 static void init_keepalive_ping_locked(grpc_exec_ctx *exec_ctx, void *arg,
                                        grpc_error *error);
@@ -346,7 +354,6 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
   if (is_client) {
     grpc_slice_buffer_add(&t->outbuf, grpc_slice_from_copied_string(
                                           GRPC_CHTTP2_CLIENT_CONNECT_STRING));
-    grpc_chttp2_initiate_write(exec_ctx, t, "initial_write");
   }
 
   /* configure http2 the way we like it */
@@ -362,14 +369,12 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
   queue_setting_update(exec_ctx, t,
                        GRPC_CHTTP2_SETTINGS_GRPC_ALLOW_TRUE_BINARY_METADATA, 1);
 
-  t->ping_policy = (grpc_chttp2_repeated_ping_policy){
-      .max_pings_without_data = DEFAULT_MAX_PINGS_BETWEEN_DATA,
-      .min_time_between_pings =
-          gpr_time_from_millis(DEFAULT_MIN_TIME_BETWEEN_PINGS_MS, GPR_TIMESPAN),
-      .max_ping_strikes = DEFAULT_MAX_PING_STRIKES,
-      .min_ping_interval_without_data = gpr_time_from_millis(
-          DEFAULT_MIN_PING_INTERVAL_WITHOUT_DATA_MS, GPR_TIMESPAN),
-  };
+  t->ping_policy.max_pings_without_data = g_default_max_pings_without_data;
+  t->ping_policy.min_sent_ping_interval_without_data = gpr_time_from_millis(
+      g_default_min_sent_ping_interval_without_data_ms, GPR_TIMESPAN);
+  t->ping_policy.max_ping_strikes = g_default_max_ping_strikes;
+  t->ping_policy.min_recv_ping_interval_without_data = gpr_time_from_millis(
+      g_default_min_recv_ping_interval_without_data_ms, GPR_TIMESPAN);
 
   /* Keepalive setting */
   if (t->is_client) {
@@ -428,29 +433,37 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
                              GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA)) {
         t->ping_policy.max_pings_without_data = grpc_channel_arg_get_integer(
             &channel_args->args[i],
-            (grpc_integer_options){DEFAULT_MAX_PINGS_BETWEEN_DATA, 0, INT_MAX});
+            (grpc_integer_options){g_default_max_pings_without_data, 0,
+                                   INT_MAX});
       } else if (0 == strcmp(channel_args->args[i].key,
                              GRPC_ARG_HTTP2_MAX_PING_STRIKES)) {
         t->ping_policy.max_ping_strikes = grpc_channel_arg_get_integer(
             &channel_args->args[i],
-            (grpc_integer_options){DEFAULT_MAX_PING_STRIKES, 0, INT_MAX});
-      } else if (0 == strcmp(channel_args->args[i].key,
-                             GRPC_ARG_HTTP2_MIN_TIME_BETWEEN_PINGS_MS)) {
-        t->ping_policy.min_time_between_pings = gpr_time_from_millis(
-            grpc_channel_arg_get_integer(
-                &channel_args->args[i],
-                (grpc_integer_options){DEFAULT_MIN_TIME_BETWEEN_PINGS_MS, 0,
-                                       INT_MAX}),
-            GPR_TIMESPAN);
+            (grpc_integer_options){g_default_max_ping_strikes, 0, INT_MAX});
       } else if (0 ==
-                 strcmp(channel_args->args[i].key,
-                        GRPC_ARG_HTTP2_MIN_PING_INTERVAL_WITHOUT_DATA_MS)) {
-        t->ping_policy.min_ping_interval_without_data = gpr_time_from_millis(
-            grpc_channel_arg_get_integer(
-                &channel_args->args[i],
-                (grpc_integer_options){
-                    DEFAULT_MIN_PING_INTERVAL_WITHOUT_DATA_MS, 0, INT_MAX}),
-            GPR_TIMESPAN);
+                 strcmp(
+                     channel_args->args[i].key,
+                     GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS)) {
+        t->ping_policy.min_sent_ping_interval_without_data =
+            gpr_time_from_millis(
+                grpc_channel_arg_get_integer(
+                    &channel_args->args[i],
+                    (grpc_integer_options){
+                        g_default_min_sent_ping_interval_without_data_ms, 0,
+                        INT_MAX}),
+                GPR_TIMESPAN);
+      } else if (0 ==
+                 strcmp(
+                     channel_args->args[i].key,
+                     GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS)) {
+        t->ping_policy.min_recv_ping_interval_without_data =
+            gpr_time_from_millis(
+                grpc_channel_arg_get_integer(
+                    &channel_args->args[i],
+                    (grpc_integer_options){
+                        g_default_min_recv_ping_interval_without_data_ms, 0,
+                        INT_MAX}),
+                GPR_TIMESPAN);
       } else if (0 == strcmp(channel_args->args[i].key,
                              GRPC_ARG_HTTP2_WRITE_BUFFER_SIZE)) {
         t->write_buffer_size = (uint32_t)grpc_channel_arg_get_integer(
@@ -557,8 +570,8 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
     }
   }
 
-  t->ping_state.pings_before_data_required =
-      t->ping_policy.max_pings_without_data;
+  /* No pings allowed before receiving a header or data frame. */
+  t->ping_state.pings_before_data_required = 0;
   t->ping_state.is_delayed_ping_timer_set = false;
 
   t->ping_recv_state.last_ping_recv_time = gpr_inf_past(GPR_CLOCK_MONOTONIC);
@@ -578,7 +591,8 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
     t->keepalive_state = GRPC_CHTTP2_KEEPALIVE_STATE_DISABLED;
   }
 
-  grpc_chttp2_initiate_write(exec_ctx, t, "init");
+  grpc_chttp2_initiate_write(exec_ctx, t,
+                             GRPC_CHTTP2_INITIATE_WRITE_INITIAL_WRITE);
   post_benign_reclaimer(exec_ctx, t);
 }
 
@@ -624,6 +638,9 @@ static void close_transport_locked(grpc_exec_ctx *exec_ctx,
     connectivity_state_set(exec_ctx, t, GRPC_CHANNEL_SHUTDOWN,
                            GRPC_ERROR_REF(error), "close_transport");
     grpc_endpoint_shutdown(exec_ctx, t->ep, GRPC_ERROR_REF(error));
+    if (t->ping_state.is_delayed_ping_timer_set) {
+      grpc_timer_cancel(exec_ctx, &t->ping_state.delayed_ping_timer);
+    }
     switch (t->keepalive_state) {
       case GRPC_CHTTP2_KEEPALIVE_STATE_WAITING:
         grpc_timer_cancel(exec_ctx, &t->keepalive_ping_timer);
@@ -689,7 +706,10 @@ static int init_stream(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
                     grpc_schedule_on_exec_ctx);
   grpc_slice_buffer_init(&s->unprocessed_incoming_frames_buffer);
   grpc_slice_buffer_init(&s->frame_storage);
+  grpc_slice_buffer_init(&s->compressed_data_buffer);
+  grpc_slice_buffer_init(&s->decompressed_data_buffer);
   s->pending_byte_stream = false;
+  s->decompressed_header_bytes = 0;
   GRPC_CLOSURE_INIT(&s->reset_byte_stream, reset_byte_stream, s,
                     grpc_combiner_scheduler(t->combiner));
 
@@ -723,14 +743,8 @@ static void destroy_stream_locked(grpc_exec_ctx *exec_ctx, void *sp,
   grpc_slice_buffer_destroy_internal(exec_ctx,
                                      &s->unprocessed_incoming_frames_buffer);
   grpc_slice_buffer_destroy_internal(exec_ctx, &s->frame_storage);
-  if (s->compressed_data_buffer) {
-    grpc_slice_buffer_destroy_internal(exec_ctx, s->compressed_data_buffer);
-    gpr_free(s->compressed_data_buffer);
-  }
-  if (s->decompressed_data_buffer) {
-    grpc_slice_buffer_destroy_internal(exec_ctx, s->decompressed_data_buffer);
-    gpr_free(s->decompressed_data_buffer);
-  }
+  grpc_slice_buffer_destroy_internal(exec_ctx, &s->compressed_data_buffer);
+  grpc_slice_buffer_destroy_internal(exec_ctx, &s->decompressed_data_buffer);
 
   grpc_chttp2_list_remove_stalled_by_transport(t, s);
   grpc_chttp2_list_remove_stalled_by_stream(t, s);
@@ -846,13 +860,91 @@ static void set_write_state(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
   }
 }
 
+static void inc_initiate_write_reason(
+    grpc_exec_ctx *exec_ctx, 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);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_START_NEW_STREAM:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_START_NEW_STREAM(exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_SEND_MESSAGE:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE(exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_SEND_INITIAL_METADATA:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA(
+          exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_SEND_TRAILING_METADATA:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_TRAILING_METADATA(
+          exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_RETRY_SEND_PING:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RETRY_SEND_PING(exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_CONTINUE_PINGS:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CONTINUE_PINGS(exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_GOAWAY_SENT:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT(exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_RST_STREAM:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM(exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_CLOSE_FROM_API:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CLOSE_FROM_API(exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_STREAM_FLOW_CONTROL:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_STREAM_FLOW_CONTROL(exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL(
+          exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_SETTINGS(exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_BDP_ESTIMATOR_PING:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_BDP_ESTIMATOR_PING(exec_ctx);
+      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);
+      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);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_APPLICATION_PING:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_APPLICATION_PING(exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_KEEPALIVE_PING:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_KEEPALIVE_PING(exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL_UNSTALLED:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED(
+          exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_PING_RESPONSE:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE(exec_ctx);
+      break;
+    case GRPC_CHTTP2_INITIATE_WRITE_FORCE_RST_STREAM:
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM(exec_ctx);
+      break;
+  }
+}
+
 void grpc_chttp2_initiate_write(grpc_exec_ctx *exec_ctx,
-                                grpc_chttp2_transport *t, const char *reason) {
+                                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:
-      set_write_state(exec_ctx, t, GRPC_CHTTP2_WRITE_STATE_WRITING, reason);
+      inc_initiate_write_reason(exec_ctx, reason);
+      set_write_state(exec_ctx, 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(
@@ -864,7 +956,7 @@ void grpc_chttp2_initiate_write(grpc_exec_ctx *exec_ctx,
       break;
     case GRPC_CHTTP2_WRITE_STATE_WRITING:
       set_write_state(exec_ctx, t, GRPC_CHTTP2_WRITE_STATE_WRITING_WITH_MORE,
-                      reason);
+                      grpc_chttp2_initiate_write_reason_string(reason));
       break;
     case GRPC_CHTTP2_WRITE_STATE_WRITING_WITH_MORE:
       break;
@@ -872,16 +964,12 @@ void grpc_chttp2_initiate_write(grpc_exec_ctx *exec_ctx,
   GPR_TIMER_END("grpc_chttp2_initiate_write", 0);
 }
 
-void grpc_chttp2_become_writable(grpc_exec_ctx *exec_ctx,
-                                 grpc_chttp2_transport *t,
-                                 grpc_chttp2_stream *s,
-                                 bool also_initiate_write, const char *reason) {
+void grpc_chttp2_mark_stream_writable(grpc_exec_ctx *exec_ctx,
+                                      grpc_chttp2_transport *t,
+                                      grpc_chttp2_stream *s) {
   if (!t->closed && grpc_chttp2_list_add_writable_stream(t, s)) {
     GRPC_CHTTP2_STREAM_REF(s, "chttp2_writing:become");
   }
-  if (also_initiate_write) {
-    grpc_chttp2_initiate_write(exec_ctx, t, reason);
-  }
 }
 
 static grpc_closure_scheduler *write_scheduler(grpc_chttp2_transport *t,
@@ -1105,7 +1193,9 @@ static void maybe_start_some_streams(grpc_exec_ctx *exec_ctx,
 
     grpc_chttp2_stream_map_add(&t->stream_map, s->id, s);
     post_destructive_reclaimer(exec_ctx, t);
-    grpc_chttp2_become_writable(exec_ctx, t, s, true, "new_stream");
+    grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+    grpc_chttp2_initiate_write(exec_ctx, 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 &&
@@ -1202,7 +1292,9 @@ static void maybe_become_writable_due_to_send_msg(grpc_exec_ctx *exec_ctx,
                                                   grpc_chttp2_stream *s) {
   if (s->id != 0 && (!s->write_buffering ||
                      s->flow_controlled_buffer.length > t->write_buffer_size)) {
-    grpc_chttp2_become_writable(exec_ctx, t, s, true, "op.send_message");
+    grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+    grpc_chttp2_initiate_write(exec_ctx, t,
+                               GRPC_CHTTP2_INITIATE_WRITE_SEND_MESSAGE);
   }
 }
 
@@ -1353,12 +1445,14 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, void *stream_op,
     on_complete->next_data.scratch |= CLOSURE_BARRIER_MAY_COVER_WRITE;
 
     /* Identify stream compression */
-    if ((s->stream_compression_send_enabled =
-             (op_payload->send_initial_metadata.send_initial_metadata->idx.named
-                  .content_encoding != NULL)) == true) {
-      s->compressed_data_buffer =
-          (grpc_slice_buffer *)gpr_malloc(sizeof(grpc_slice_buffer));
-      grpc_slice_buffer_init(s->compressed_data_buffer);
+    if (op_payload->send_initial_metadata.send_initial_metadata->idx.named
+                .content_encoding == NULL ||
+        grpc_stream_compression_method_parse(
+            GRPC_MDVALUE(
+                op_payload->send_initial_metadata.send_initial_metadata->idx
+                    .named.content_encoding->md),
+            true, &s->stream_compression_method) == 0) {
+      s->stream_compression_method = GRPC_STREAM_COMPRESSION_IDENTITY_COMPRESS;
     }
 
     s->send_initial_metadata_finished = add_closure_barrier(on_complete);
@@ -1404,14 +1498,13 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, void *stream_op,
           }
         } else {
           GPR_ASSERT(s->id != 0);
-          bool initiate_write = true;
-          if (op->send_message &&
-              (op->payload->send_message.send_message->flags &
-               GRPC_WRITE_BUFFER_HINT)) {
-            initiate_write = false;
+          grpc_chttp2_mark_stream_writable(exec_ctx, 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);
           }
-          grpc_chttp2_become_writable(exec_ctx, t, s, initiate_write,
-                                      "op.send_initial_metadata");
         }
       } else {
         s->send_initial_metadata = NULL;
@@ -1519,8 +1612,9 @@ 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_become_writable(exec_ctx, t, s, true,
-                                    "op.send_trailing_metadata");
+        grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+        grpc_chttp2_initiate_write(
+            exec_ctx, t, GRPC_CHTTP2_INITIATE_WRITE_SEND_TRAILING_METADATA);
       }
     }
   }
@@ -1632,15 +1726,17 @@ static void cancel_pings(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
   GRPC_ERROR_UNREF(error);
 }
 
-static void send_ping_locked(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
-                             grpc_chttp2_ping_type ping_type,
-                             grpc_closure *on_initiate, grpc_closure *on_ack) {
+static void send_ping_locked(
+    grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
+    grpc_chttp2_ping_type ping_type, grpc_closure *on_initiate,
+    grpc_closure *on_ack,
+    grpc_chttp2_initiate_write_reason initiate_write_reason) {
   grpc_chttp2_ping_queue *pq = &t->ping_queues[ping_type];
   grpc_closure_list_append(&pq->lists[GRPC_CHTTP2_PCL_INITIATE], on_initiate,
                            GRPC_ERROR_NONE);
   if (grpc_closure_list_append(&pq->lists[GRPC_CHTTP2_PCL_NEXT], on_ack,
                                GRPC_ERROR_NONE)) {
-    grpc_chttp2_initiate_write(exec_ctx, t, "send_ping");
+    grpc_chttp2_initiate_write(exec_ctx, t, initiate_write_reason);
   }
 }
 
@@ -1648,7 +1744,10 @@ static void retry_initiate_ping_locked(grpc_exec_ctx *exec_ctx, void *tp,
                                        grpc_error *error) {
   grpc_chttp2_transport *t = (grpc_chttp2_transport *)tp;
   t->ping_state.is_delayed_ping_timer_set = false;
-  grpc_chttp2_initiate_write(exec_ctx, t, "retry_send_ping");
+  if (error == GRPC_ERROR_NONE) {
+    grpc_chttp2_initiate_write(exec_ctx, t,
+                               GRPC_CHTTP2_INITIATE_WRITE_RETRY_SEND_PING);
+  }
 }
 
 void grpc_chttp2_ack_ping(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
@@ -1663,7 +1762,8 @@ void grpc_chttp2_ack_ping(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
   }
   GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pq->lists[GRPC_CHTTP2_PCL_INFLIGHT]);
   if (!grpc_closure_list_empty(pq->lists[GRPC_CHTTP2_PCL_NEXT])) {
-    grpc_chttp2_initiate_write(exec_ctx, t, "continue_pings");
+    grpc_chttp2_initiate_write(exec_ctx, t,
+                               GRPC_CHTTP2_INITIATE_WRITE_CONTINUE_PINGS);
   }
 }
 
@@ -1676,7 +1776,8 @@ static void send_goaway(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
                         &slice, &http_error);
   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, "goaway_sent");
+  grpc_chttp2_initiate_write(exec_ctx, t,
+                             GRPC_CHTTP2_INITIATE_WRITE_GOAWAY_SENT);
   GRPC_ERROR_UNREF(error);
 }
 
@@ -1723,7 +1824,8 @@ static void perform_transport_op_locked(grpc_exec_ctx *exec_ctx,
 
   if (op->send_ping) {
     send_ping_locked(exec_ctx, t, GRPC_CHTTP2_PING_ON_NEXT_WRITE, NULL,
-                     op->send_ping);
+                     op->send_ping,
+                     GRPC_CHTTP2_INITIATE_WRITE_APPLICATION_PING);
   }
 
   if (op->on_connectivity_state_change != NULL) {
@@ -1799,20 +1901,20 @@ void grpc_chttp2_maybe_complete_recv_message(grpc_exec_ctx *exec_ctx,
                                  &s->frame_storage);
           s->unprocessed_incoming_frames_decompressed = false;
         }
-        if (s->stream_compression_recv_enabled &&
-            !s->unprocessed_incoming_frames_decompressed) {
-          GPR_ASSERT(s->decompressed_data_buffer->length == 0);
+        if (!s->unprocessed_incoming_frames_decompressed) {
+          GPR_ASSERT(s->decompressed_data_buffer.length == 0);
           bool end_of_context;
           if (!s->stream_decompression_ctx) {
             s->stream_decompression_ctx =
                 grpc_stream_compression_context_create(
-                    GRPC_STREAM_COMPRESSION_DECOMPRESS);
+                    s->stream_decompression_method);
           }
-          if (!grpc_stream_decompress(s->stream_decompression_ctx,
-                                      &s->unprocessed_incoming_frames_buffer,
-                                      s->decompressed_data_buffer, NULL,
-                                      GRPC_HEADER_SIZE_IN_BYTES,
-                                      &end_of_context)) {
+          if (!grpc_stream_decompress(
+                  s->stream_decompression_ctx,
+                  &s->unprocessed_incoming_frames_buffer,
+                  &s->decompressed_data_buffer, NULL,
+                  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(
@@ -1820,9 +1922,13 @@ void grpc_chttp2_maybe_complete_recv_message(grpc_exec_ctx *exec_ctx,
             error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                 "Stream decompression error.");
           } else {
+            s->decompressed_header_bytes += s->decompressed_data_buffer.length;
+            if (s->decompressed_header_bytes == GRPC_HEADER_SIZE_IN_BYTES) {
+              s->decompressed_header_bytes = 0;
+            }
             error = grpc_deframe_unprocessed_incoming_frames(
-                exec_ctx, &s->data_parser, s, s->decompressed_data_buffer, NULL,
-                s->recv_message);
+                exec_ctx, &s->data_parser, s, &s->decompressed_data_buffer,
+                NULL, s->recv_message);
             if (end_of_context) {
               grpc_stream_compression_context_destroy(
                   s->stream_decompression_ctx);
@@ -1871,15 +1977,14 @@ void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_exec_ctx *exec_ctx,
     }
     bool pending_data = s->pending_byte_stream ||
                         s->unprocessed_incoming_frames_buffer.length > 0;
-    if (s->stream_compression_recv_enabled && s->read_closed &&
-        s->frame_storage.length > 0 && !pending_data && !s->seen_error &&
-        s->recv_trailing_metadata_finished != NULL) {
+    if (s->read_closed && s->frame_storage.length > 0 && !pending_data &&
+        !s->seen_error && s->recv_trailing_metadata_finished != NULL) {
       /* Maybe some SYNC_FLUSH data is left in frame_storage. Consume them and
        * maybe decompress the next 5 bytes in the stream. */
       bool end_of_context;
       if (!s->stream_decompression_ctx) {
         s->stream_decompression_ctx = grpc_stream_compression_context_create(
-            GRPC_STREAM_COMPRESSION_DECOMPRESS);
+            s->stream_decompression_method);
       }
       if (!grpc_stream_decompress(s->stream_decompression_ctx,
                                   &s->frame_storage,
@@ -1892,6 +1997,7 @@ void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_exec_ctx *exec_ctx,
       } else {
         if (s->unprocessed_incoming_frames_buffer.length > 0) {
           s->unprocessed_incoming_frames_decompressed = true;
+          pending_data = true;
         }
         if (end_of_context) {
           grpc_stream_compression_context_destroy(s->stream_decompression_ctx);
@@ -1968,7 +2074,8 @@ void grpc_chttp2_cancel_stream(grpc_exec_ctx *exec_ctx,
       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, "rst_stream");
+      grpc_chttp2_initiate_write(exec_ctx, t,
+                                 GRPC_CHTTP2_INITIATE_WRITE_RST_STREAM);
     }
   }
   if (due_to_error != GRPC_ERROR_NONE && !s->seen_error) {
@@ -2289,7 +2396,8 @@ static void close_from_api(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
                                               &s->stats.outgoing));
 
   grpc_chttp2_mark_stream_closed(exec_ctx, t, s, 1, 1, error);
-  grpc_chttp2_initiate_write(exec_ctx, t, "close_from_api");
+  grpc_chttp2_initiate_write(exec_ctx, t,
+                             GRPC_CHTTP2_INITIATE_WRITE_CLOSE_FROM_API);
 }
 
 typedef struct {
@@ -2324,19 +2432,20 @@ void grpc_chttp2_act_on_flowctl_action(grpc_exec_ctx *exec_ctx,
     case GRPC_CHTTP2_FLOWCTL_NO_ACTION_NEEDED:
       break;
     case GRPC_CHTTP2_FLOWCTL_UPDATE_IMMEDIATELY:
-      grpc_chttp2_become_writable(exec_ctx, t, s, true,
-                                  "immediate stream flowctl");
+      grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+      grpc_chttp2_initiate_write(
+          exec_ctx, t, GRPC_CHTTP2_INITIATE_WRITE_STREAM_FLOW_CONTROL);
       break;
     case GRPC_CHTTP2_FLOWCTL_QUEUE_UPDATE:
-      grpc_chttp2_become_writable(exec_ctx, t, s, false,
-                                  "queue stream flowctl");
+      grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
       break;
   }
   switch (action.send_transport_update) {
     case GRPC_CHTTP2_FLOWCTL_NO_ACTION_NEEDED:
       break;
     case GRPC_CHTTP2_FLOWCTL_UPDATE_IMMEDIATELY:
-      grpc_chttp2_initiate_write(exec_ctx, t, "immediate transport flowctl");
+      grpc_chttp2_initiate_write(
+          exec_ctx, t, GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL);
       break;
     // this is the same as no action b/c every time the transport enters the
     // writing path it will maybe do an update
@@ -2354,7 +2463,8 @@ void grpc_chttp2_act_on_flowctl_action(grpc_exec_ctx *exec_ctx,
                            (uint32_t)action.max_frame_size);
     }
     if (action.send_setting_update == GRPC_CHTTP2_FLOWCTL_UPDATE_IMMEDIATELY) {
-      grpc_chttp2_initiate_write(exec_ctx, t, "immediate setting update");
+      grpc_chttp2_initiate_write(exec_ctx, t,
+                                 GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS);
     }
   }
   if (action.need_ping) {
@@ -2362,7 +2472,8 @@ void grpc_chttp2_act_on_flowctl_action(grpc_exec_ctx *exec_ctx,
     grpc_bdp_estimator_schedule_ping(&t->flow_control.bdp_estimator);
     send_ping_locked(exec_ctx, t,
                      GRPC_CHTTP2_PING_BEFORE_TRANSPORT_WINDOW_UPDATE,
-                     &t->start_bdp_ping_locked, &t->finish_bdp_ping_locked);
+                     &t->start_bdp_ping_locked, &t->finish_bdp_ping_locked,
+                     GRPC_CHTTP2_INITIATE_WRITE_BDP_ESTIMATOR_PING);
   }
 }
 
@@ -2441,7 +2552,10 @@ static void read_action_locked(grpc_exec_ctx *exec_ctx, void *tp,
       if (t->flow_control.initial_window_update > 0) {
         grpc_chttp2_stream *s;
         while (grpc_chttp2_list_pop_stalled_by_stream(t, &s)) {
-          grpc_chttp2_become_writable(exec_ctx, t, s, true, "unstalled");
+          grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+          grpc_chttp2_initiate_write(
+              exec_ctx, t,
+              GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_SETTING);
         }
       }
       t->flow_control.initial_window_update = 0;
@@ -2538,6 +2652,36 @@ void grpc_chttp2_config_default_keepalive_args(grpc_channel_args *args,
                 &args->args[i],
                 (grpc_integer_options){g_default_keepalive_permit_without_calls,
                                        0, 1});
+      } else if (0 ==
+                 strcmp(args->args[i].key, GRPC_ARG_HTTP2_MAX_PING_STRIKES)) {
+        g_default_max_ping_strikes = grpc_channel_arg_get_integer(
+            &args->args[i],
+            (grpc_integer_options){g_default_max_ping_strikes, 0, INT_MAX});
+      } else if (0 == strcmp(args->args[i].key,
+                             GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA)) {
+        g_default_max_pings_without_data = grpc_channel_arg_get_integer(
+            &args->args[i], (grpc_integer_options){
+                                g_default_max_pings_without_data, 0, INT_MAX});
+      } else if (0 ==
+                 strcmp(
+                     args->args[i].key,
+                     GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS)) {
+        g_default_min_sent_ping_interval_without_data_ms =
+            grpc_channel_arg_get_integer(
+                &args->args[i],
+                (grpc_integer_options){
+                    g_default_min_sent_ping_interval_without_data_ms, 0,
+                    INT_MAX});
+      } else if (0 ==
+                 strcmp(
+                     args->args[i].key,
+                     GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS)) {
+        g_default_min_recv_ping_interval_without_data_ms =
+            grpc_channel_arg_get_integer(
+                &args->args[i],
+                (grpc_integer_options){
+                    g_default_min_recv_ping_interval_without_data_ms, 0,
+                    INT_MAX});
       }
     }
   }
@@ -2556,7 +2700,8 @@ static void init_keepalive_ping_locked(grpc_exec_ctx *exec_ctx, void *arg,
       GRPC_CHTTP2_REF_TRANSPORT(t, "keepalive ping end");
       send_ping_locked(exec_ctx, t, GRPC_CHTTP2_PING_ON_NEXT_WRITE,
                        &t->start_keepalive_ping_locked,
-                       &t->finish_keepalive_ping_locked);
+                       &t->finish_keepalive_ping_locked,
+                       GRPC_CHTTP2_INITIATE_WRITE_KEEPALIVE_PING);
     } else {
       GRPC_CHTTP2_REF_TRANSPORT(t, "init keepalive ping");
       grpc_timer_init(
@@ -2671,7 +2816,7 @@ static void reset_byte_stream(grpc_exec_ctx *exec_ctx, void *arg,
     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));
-    s->byte_stream_error = error;
+    s->byte_stream_error = GRPC_ERROR_REF(error);
   }
 }
 
@@ -2769,24 +2914,23 @@ static grpc_error *incoming_byte_stream_pull(grpc_exec_ctx *exec_ctx,
   grpc_error *error;
 
   if (s->unprocessed_incoming_frames_buffer.length > 0) {
-    if (s->stream_compression_recv_enabled &&
-        !s->unprocessed_incoming_frames_decompressed) {
+    if (!s->unprocessed_incoming_frames_decompressed) {
       bool end_of_context;
       if (!s->stream_decompression_ctx) {
         s->stream_decompression_ctx = grpc_stream_compression_context_create(
-            GRPC_STREAM_COMPRESSION_DECOMPRESS);
+            s->stream_decompression_method);
       }
       if (!grpc_stream_decompress(s->stream_decompression_ctx,
                                   &s->unprocessed_incoming_frames_buffer,
-                                  s->decompressed_data_buffer, NULL, MAX_SIZE_T,
-                                  &end_of_context)) {
+                                  &s->decompressed_data_buffer, NULL,
+                                  MAX_SIZE_T, &end_of_context)) {
         error =
             GRPC_ERROR_CREATE_FROM_STATIC_STRING("Stream decompression error.");
         return error;
       }
       GPR_ASSERT(s->unprocessed_incoming_frames_buffer.length == 0);
       grpc_slice_buffer_swap(&s->unprocessed_incoming_frames_buffer,
-                             s->decompressed_data_buffer);
+                             &s->decompressed_data_buffer);
       s->unprocessed_incoming_frames_decompressed = true;
       if (end_of_context) {
         grpc_stream_compression_context_destroy(s->stream_decompression_ctx);
@@ -2912,7 +3056,8 @@ 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_incoming_byte_stream *incoming_byte_stream =
-      gpr_malloc(sizeof(*incoming_byte_stream));
+      (grpc_chttp2_incoming_byte_stream *)gpr_malloc(
+          sizeof(*incoming_byte_stream));
   incoming_byte_stream->base.length = frame_size;
   incoming_byte_stream->remaining_bytes = frame_size;
   incoming_byte_stream->base.flags = flags;
@@ -3016,6 +3161,56 @@ static void destructive_reclaimer_locked(grpc_exec_ctx *exec_ctx, void *arg,
 /*******************************************************************************
  * MONITORING
  */
+
+const char *grpc_chttp2_initiate_write_reason_string(
+    grpc_chttp2_initiate_write_reason reason) {
+  switch (reason) {
+    case GRPC_CHTTP2_INITIATE_WRITE_INITIAL_WRITE:
+      return "INITIAL_WRITE";
+    case GRPC_CHTTP2_INITIATE_WRITE_START_NEW_STREAM:
+      return "START_NEW_STREAM";
+    case GRPC_CHTTP2_INITIATE_WRITE_SEND_MESSAGE:
+      return "SEND_MESSAGE";
+    case GRPC_CHTTP2_INITIATE_WRITE_SEND_INITIAL_METADATA:
+      return "SEND_INITIAL_METADATA";
+    case GRPC_CHTTP2_INITIATE_WRITE_SEND_TRAILING_METADATA:
+      return "SEND_TRAILING_METADATA";
+    case GRPC_CHTTP2_INITIATE_WRITE_RETRY_SEND_PING:
+      return "RETRY_SEND_PING";
+    case GRPC_CHTTP2_INITIATE_WRITE_CONTINUE_PINGS:
+      return "CONTINUE_PINGS";
+    case GRPC_CHTTP2_INITIATE_WRITE_GOAWAY_SENT:
+      return "GOAWAY_SENT";
+    case GRPC_CHTTP2_INITIATE_WRITE_RST_STREAM:
+      return "RST_STREAM";
+    case GRPC_CHTTP2_INITIATE_WRITE_CLOSE_FROM_API:
+      return "CLOSE_FROM_API";
+    case GRPC_CHTTP2_INITIATE_WRITE_STREAM_FLOW_CONTROL:
+      return "STREAM_FLOW_CONTROL";
+    case GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL:
+      return "TRANSPORT_FLOW_CONTROL";
+    case GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS:
+      return "SEND_SETTINGS";
+    case GRPC_CHTTP2_INITIATE_WRITE_BDP_ESTIMATOR_PING:
+      return "BDP_ESTIMATOR_PING";
+    case GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_SETTING:
+      return "FLOW_CONTROL_UNSTALLED_BY_SETTING";
+    case GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_UPDATE:
+      return "FLOW_CONTROL_UNSTALLED_BY_UPDATE";
+    case GRPC_CHTTP2_INITIATE_WRITE_APPLICATION_PING:
+      return "APPLICATION_PING";
+    case GRPC_CHTTP2_INITIATE_WRITE_KEEPALIVE_PING:
+      return "KEEPALIVE_PING";
+    case GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL_UNSTALLED:
+      return "TRANSPORT_FLOW_CONTROL_UNSTALLED";
+    case GRPC_CHTTP2_INITIATE_WRITE_PING_RESPONSE:
+      return "PING_RESPONSE";
+    case GRPC_CHTTP2_INITIATE_WRITE_FORCE_RST_STREAM:
+      return "FORCE_RST_STREAM";
+  }
+  GPR_UNREACHABLE_CODE(return "unknown");
+}
+
 static grpc_endpoint *chttp2_get_endpoint(grpc_exec_ctx *exec_ctx,
                                           grpc_transport *t) {
   return ((grpc_chttp2_transport *)t)->ep;
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.h b/src/core/ext/transport/chttp2/transport/chttp2_transport.h
index 0c4e2a91c0..55fb1a8343 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.h
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.h
@@ -25,6 +25,7 @@
 
 extern grpc_tracer_flag grpc_http_trace;
 extern grpc_tracer_flag grpc_flowctl_trace;
+extern grpc_tracer_flag grpc_trace_http2_stream_state;
 
 #ifndef NDEBUG
 extern grpc_tracer_flag grpc_trace_chttp2_refcount;
diff --git a/src/core/ext/transport/chttp2/transport/flow_control.c b/src/core/ext/transport/chttp2/transport/flow_control.c
index cec99f6fb6..569a6349d3 100644
--- a/src/core/ext/transport/chttp2/transport/flow_control.c
+++ b/src/core/ext/transport/chttp2/transport/flow_control.c
@@ -18,6 +18,7 @@
 
 #include "src/core/ext/transport/chttp2/transport/internal.h"
 
+#include <limits.h>
 #include <math.h>
 #include <string.h>
 
@@ -59,24 +60,24 @@ static void pretrace(shadow_flow_control* shadow_fc,
 
 #define TRACE_PADDING 30
 
-static char* fmt_int64_diff_str(int64_t old, int64_t new) {
+static char* fmt_int64_diff_str(int64_t old_val, int64_t new_val) {
   char* str;
-  if (old != new) {
-    gpr_asprintf(&str, "%" PRId64 " -> %" PRId64 "", old, new);
+  if (old_val != new_val) {
+    gpr_asprintf(&str, "%" PRId64 " -> %" PRId64 "", old_val, new_val);
   } else {
-    gpr_asprintf(&str, "%" PRId64 "", old);
+    gpr_asprintf(&str, "%" PRId64 "", old_val);
   }
   char* str_lp = gpr_leftpad(str, ' ', TRACE_PADDING);
   gpr_free(str);
   return str_lp;
 }
 
-static char* fmt_uint32_diff_str(uint32_t old, uint32_t new) {
+static char* fmt_uint32_diff_str(uint32_t old_val, uint32_t new_val) {
   char* str;
-  if (new > 0 && old != new) {
-    gpr_asprintf(&str, "%" PRIu32 " -> %" PRIu32 "", old, new);
+  if (new_val > 0 && old_val != new_val) {
+    gpr_asprintf(&str, "%" PRIu32 " -> %" PRIu32 "", old_val, new_val);
   } else {
-    gpr_asprintf(&str, "%" PRIu32 "", old);
+    gpr_asprintf(&str, "%" PRIu32 "", old_val);
   }
   char* str_lp = gpr_leftpad(str, ' ', TRACE_PADDING);
   gpr_free(str);
@@ -483,7 +484,8 @@ grpc_chttp2_flowctl_action grpc_chttp2_flowctl_get_bdp_action(
     if (grpc_bdp_estimator_get_bw(&tfc->bdp_estimator, &bw_dbl)) {
       // we target the max of BDP or bandwidth in microseconds.
       int32_t frame_size = (int32_t)GPR_CLAMP(
-          GPR_MAX((int32_t)bw_dbl / 1000, bdp), 16384, 16777215);
+          GPR_MAX((int32_t)GPR_CLAMP(bw_dbl, 0, INT_MAX) / 1000, bdp), 16384,
+          16777215);
       grpc_chttp2_flowctl_urgency frame_size_urgency = delta_is_significant(
           tfc, frame_size, GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE);
       if (frame_size_urgency != GRPC_CHTTP2_FLOWCTL_NO_ACTION_NEEDED) {
diff --git a/src/core/ext/transport/chttp2/transport/frame_data.c b/src/core/ext/transport/chttp2/transport/frame_data.c
index 222d2177b2..73aaab1802 100644
--- a/src/core/ext/transport/chttp2/transport/frame_data.c
+++ b/src/core/ext/transport/chttp2/transport/frame_data.c
@@ -210,7 +210,7 @@ grpc_error *grpc_deframe_unprocessed_incoming_frames(
 
         if (cur != end) {
           grpc_slice_buffer_undo_take_first(
-              &s->unprocessed_incoming_frames_buffer,
+              slices,
               grpc_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
         }
         grpc_slice_unref_internal(exec_ctx, slice);
@@ -277,7 +277,7 @@ grpc_error *grpc_deframe_unprocessed_incoming_frames(
           p->state = GRPC_CHTTP2_DATA_FH_0;
           cur += p->frame_size;
           grpc_slice_buffer_undo_take_first(
-              &s->unprocessed_incoming_frames_buffer,
+              slices,
               grpc_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
           grpc_slice_unref_internal(exec_ctx, slice);
           return GRPC_ERROR_NONE;
diff --git a/src/core/ext/transport/chttp2/transport/frame_ping.c b/src/core/ext/transport/chttp2/transport/frame_ping.c
index 582fd7bfaa..d431d6b2df 100644
--- a/src/core/ext/transport/chttp2/transport/frame_ping.c
+++ b/src/core/ext/transport/chttp2/transport/frame_ping.c
@@ -92,7 +92,7 @@ grpc_error *grpc_chttp2_ping_parser_parse(grpc_exec_ctx *exec_ctx, void *parser,
         gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
         gpr_timespec next_allowed_ping =
             gpr_time_add(t->ping_recv_state.last_ping_recv_time,
-                         t->ping_policy.min_ping_interval_without_data);
+                         t->ping_policy.min_recv_ping_interval_without_data);
 
         if (t->keepalive_permit_without_calls == 0 &&
             grpc_chttp2_stream_map_size(&t->stream_map) == 0) {
@@ -117,7 +117,8 @@ 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, "ping response");
+        grpc_chttp2_initiate_write(exec_ctx, t,
+                                   GRPC_CHTTP2_INITIATE_WRITE_PING_RESPONSE);
       }
     }
   }
diff --git a/src/core/ext/transport/chttp2/transport/frame_settings.c b/src/core/ext/transport/chttp2/transport/frame_settings.c
index 806100adaa..2995bf7310 100644
--- a/src/core/ext/transport/chttp2/transport/frame_settings.c
+++ b/src/core/ext/transport/chttp2/transport/frame_settings.c
@@ -44,7 +44,8 @@ static uint8_t *fill_header(uint8_t *out, uint32_t length, uint8_t flags) {
   return out;
 }
 
-grpc_slice grpc_chttp2_settings_create(uint32_t *old, const uint32_t *new,
+grpc_slice grpc_chttp2_settings_create(uint32_t *old_settings,
+                                       const uint32_t *new_settings,
                                        uint32_t force_mask, size_t count) {
   size_t i;
   uint32_t n = 0;
@@ -52,21 +53,21 @@ grpc_slice grpc_chttp2_settings_create(uint32_t *old, const uint32_t *new,
   uint8_t *p;
 
   for (i = 0; i < count; i++) {
-    n += (new[i] != old[i] || (force_mask & (1u << i)) != 0);
+    n += (new_settings[i] != old_settings[i] || (force_mask & (1u << i)) != 0);
   }
 
   output = GRPC_SLICE_MALLOC(9 + 6 * n);
   p = fill_header(GRPC_SLICE_START_PTR(output), 6 * n, 0);
 
   for (i = 0; i < count; i++) {
-    if (new[i] != old[i] || (force_mask & (1u << i)) != 0) {
+    if (new_settings[i] != old_settings[i] || (force_mask & (1u << i)) != 0) {
       *p++ = (uint8_t)(grpc_setting_id_to_wire_id[i] >> 8);
       *p++ = (uint8_t)(grpc_setting_id_to_wire_id[i]);
-      *p++ = (uint8_t)(new[i] >> 24);
-      *p++ = (uint8_t)(new[i] >> 16);
-      *p++ = (uint8_t)(new[i] >> 8);
-      *p++ = (uint8_t)(new[i]);
-      old[i] = new[i];
+      *p++ = (uint8_t)(new_settings[i] >> 24);
+      *p++ = (uint8_t)(new_settings[i] >> 16);
+      *p++ = (uint8_t)(new_settings[i] >> 8);
+      *p++ = (uint8_t)(new_settings[i]);
+      old_settings[i] = new_settings[i];
     }
   }
 
diff --git a/src/core/ext/transport/chttp2/transport/frame_window_update.c b/src/core/ext/transport/chttp2/transport/frame_window_update.c
index c94f7725bf..c9ab8d1b50 100644
--- a/src/core/ext/transport/chttp2/transport/frame_window_update.c
+++ b/src/core/ext/transport/chttp2/transport/frame_window_update.c
@@ -99,8 +99,10 @@ grpc_error *grpc_chttp2_window_update_parser_parse(
         grpc_chttp2_flowctl_recv_stream_update(
             &t->flow_control, &s->flow_control, received_update);
         if (grpc_chttp2_list_remove_stalled_by_stream(t, s)) {
-          grpc_chttp2_become_writable(exec_ctx, t, s, true,
-                                      "stream.read_flow_control");
+          grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+          grpc_chttp2_initiate_write(
+              exec_ctx, t,
+              GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_UPDATE);
         }
       }
     } else {
@@ -109,7 +111,9 @@ grpc_error *grpc_chttp2_window_update_parser_parse(
                                                 received_update);
       bool is_zero = t->flow_control.remote_window <= 0;
       if (was_zero && !is_zero) {
-        grpc_chttp2_initiate_write(exec_ctx, t, "new_global_flow_control");
+        grpc_chttp2_initiate_write(
+            exec_ctx, t,
+            GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL_UNSTALLED);
       }
     }
   }
diff --git a/src/core/ext/transport/chttp2/transport/hpack_encoder.c b/src/core/ext/transport/chttp2/transport/hpack_encoder.c
index 3cd1a7ee5c..a404b664e3 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_encoder.c
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.c
@@ -33,6 +33,7 @@
 #include "src/core/ext/transport/chttp2/transport/bin_encoder.h"
 #include "src/core/ext/transport/chttp2/transport/hpack_table.h"
 #include "src/core/ext/transport/chttp2/transport/varint.h"
+#include "src/core/lib/debug/stats.h"
 #include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/transport/metadata.h"
@@ -51,8 +52,10 @@
 #define MAX_DECODER_SPACE_USAGE 512
 
 static grpc_slice_refcount terminal_slice_refcount = {NULL, NULL};
-static const grpc_slice terminal_slice = {&terminal_slice_refcount,
-                                          .data.refcounted = {0, 0}};
+static const grpc_slice terminal_slice = {
+    &terminal_slice_refcount, /* refcount */
+    {{0, 0}}                  /* data.refcounted */
+};
 
 extern grpc_tracer_flag grpc_http_trace;
 
@@ -269,8 +272,10 @@ static void add_elem(grpc_exec_ctx *exec_ctx, grpc_chttp2_hpack_compressor *c,
   }
 }
 
-static void emit_indexed(grpc_chttp2_hpack_compressor *c, uint32_t elem_index,
+static void emit_indexed(grpc_exec_ctx *exec_ctx,
+                         grpc_chttp2_hpack_compressor *c, uint32_t elem_index,
                          framer_state *st) {
+  GRPC_STATS_INC_HPACK_SEND_INDEXED(exec_ctx);
   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);
@@ -282,30 +287,31 @@ typedef struct {
   bool insert_null_before_wire_value;
 } wire_value;
 
-static wire_value get_wire_value(grpc_mdelem elem, bool true_binary_enabled) {
+static wire_value get_wire_value(grpc_exec_ctx *exec_ctx, grpc_mdelem elem,
+                                 bool true_binary_enabled) {
+  wire_value wire_val;
   if (grpc_is_binary_header(GRPC_MDKEY(elem))) {
     if (true_binary_enabled) {
-      return (wire_value){
-          .huffman_prefix = 0x00,
-          .insert_null_before_wire_value = true,
-          .data = grpc_slice_ref_internal(GRPC_MDVALUE(elem)),
-      };
+      GRPC_STATS_INC_HPACK_SEND_BINARY(exec_ctx);
+      wire_val.huffman_prefix = 0x00;
+      wire_val.insert_null_before_wire_value = true;
+      wire_val.data = grpc_slice_ref_internal(GRPC_MDVALUE(elem));
+
     } else {
-      return (wire_value){
-          .huffman_prefix = 0x80,
-          .insert_null_before_wire_value = false,
-          .data = grpc_chttp2_base64_encode_and_huffman_compress(
-              GRPC_MDVALUE(elem)),
-      };
+      GRPC_STATS_INC_HPACK_SEND_BINARY_BASE64(exec_ctx);
+      wire_val.huffman_prefix = 0x80;
+      wire_val.insert_null_before_wire_value = false;
+      wire_val.data =
+          grpc_chttp2_base64_encode_and_huffman_compress(GRPC_MDVALUE(elem));
     }
   } else {
     /* TODO(ctiller): opportunistically compress non-binary headers */
-    return (wire_value){
-        .huffman_prefix = 0x00,
-        .insert_null_before_wire_value = false,
-        .data = grpc_slice_ref_internal(GRPC_MDVALUE(elem)),
-    };
+    GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED(exec_ctx);
+    wire_val.huffman_prefix = 0x00;
+    wire_val.insert_null_before_wire_value = false;
+    wire_val.data = grpc_slice_ref_internal(GRPC_MDVALUE(elem));
   }
+  return wire_val;
 }
 
 static size_t wire_value_length(wire_value v) {
@@ -317,11 +323,14 @@ static void add_wire_value(framer_state *st, wire_value v) {
   add_header_data(st, v.data);
 }
 
-static void emit_lithdr_incidx(grpc_chttp2_hpack_compressor *c,
+static void emit_lithdr_incidx(grpc_exec_ctx *exec_ctx,
+                               grpc_chttp2_hpack_compressor *c,
                                uint32_t key_index, grpc_mdelem elem,
                                framer_state *st) {
+  GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX(exec_ctx);
   uint32_t len_pfx = GRPC_CHTTP2_VARINT_LENGTH(key_index, 2);
-  wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
+  wire_value value =
+      get_wire_value(exec_ctx, 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);
@@ -333,11 +342,14 @@ static void emit_lithdr_incidx(grpc_chttp2_hpack_compressor *c,
   add_wire_value(st, value);
 }
 
-static void emit_lithdr_noidx(grpc_chttp2_hpack_compressor *c,
+static void emit_lithdr_noidx(grpc_exec_ctx *exec_ctx,
+                              grpc_chttp2_hpack_compressor *c,
                               uint32_t key_index, grpc_mdelem elem,
                               framer_state *st) {
+  GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX(exec_ctx);
   uint32_t len_pfx = GRPC_CHTTP2_VARINT_LENGTH(key_index, 4);
-  wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
+  wire_value value =
+      get_wire_value(exec_ctx, 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);
@@ -349,10 +361,14 @@ static void emit_lithdr_noidx(grpc_chttp2_hpack_compressor *c,
   add_wire_value(st, value);
 }
 
-static void emit_lithdr_incidx_v(grpc_chttp2_hpack_compressor *c,
+static void emit_lithdr_incidx_v(grpc_exec_ctx *exec_ctx,
+                                 grpc_chttp2_hpack_compressor *c,
                                  grpc_mdelem elem, framer_state *st) {
+  GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX_V(exec_ctx);
+  GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED(exec_ctx);
   uint32_t len_key = (uint32_t)GRPC_SLICE_LENGTH(GRPC_MDKEY(elem));
-  wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
+  wire_value value =
+      get_wire_value(exec_ctx, 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);
@@ -367,10 +383,14 @@ static void emit_lithdr_incidx_v(grpc_chttp2_hpack_compressor *c,
   add_wire_value(st, value);
 }
 
-static void emit_lithdr_noidx_v(grpc_chttp2_hpack_compressor *c,
+static void emit_lithdr_noidx_v(grpc_exec_ctx *exec_ctx,
+                                grpc_chttp2_hpack_compressor *c,
                                 grpc_mdelem elem, framer_state *st) {
+  GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX_V(exec_ctx);
+  GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED(exec_ctx);
   uint32_t len_key = (uint32_t)GRPC_SLICE_LENGTH(GRPC_MDKEY(elem));
-  wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
+  wire_value value =
+      get_wire_value(exec_ctx, 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);
@@ -423,7 +443,7 @@ static void hpack_enc(grpc_exec_ctx *exec_ctx, grpc_chttp2_hpack_compressor *c,
     gpr_free(v);
   }
   if (!GRPC_MDELEM_IS_INTERNED(elem)) {
-    emit_lithdr_noidx_v(c, elem, st);
+    emit_lithdr_noidx_v(exec_ctx, c, elem, st);
     return;
   }
 
@@ -445,16 +465,16 @@ 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(c, dynidx(c, c->indices_elems[HASH_FRAGMENT_2(elem_hash)]),
-                 st);
+    emit_indexed(exec_ctx, 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(c, dynidx(c, c->indices_elems[HASH_FRAGMENT_3(elem_hash)]),
-                 st);
+    emit_indexed(exec_ctx, c,
+                 dynidx(c, c->indices_elems[HASH_FRAGMENT_3(elem_hash)]), st);
     return;
   }
 
@@ -472,11 +492,11 @@ static void hpack_enc(grpc_exec_ctx *exec_ctx, grpc_chttp2_hpack_compressor *c,
       indices_key > c->tail_remote_index) {
     /* HIT: key (first cuckoo hash) */
     if (should_add_elem) {
-      emit_lithdr_incidx(c, dynidx(c, indices_key), elem, st);
+      emit_lithdr_incidx(exec_ctx, c, dynidx(c, indices_key), elem, st);
       add_elem(exec_ctx, c, elem);
       return;
     } else {
-      emit_lithdr_noidx(c, dynidx(c, indices_key), elem, st);
+      emit_lithdr_noidx(exec_ctx, c, dynidx(c, indices_key), elem, st);
       return;
     }
     GPR_UNREACHABLE_CODE(return );
@@ -488,11 +508,11 @@ static void hpack_enc(grpc_exec_ctx *exec_ctx, grpc_chttp2_hpack_compressor *c,
       indices_key > c->tail_remote_index) {
     /* HIT: key (first cuckoo hash) */
     if (should_add_elem) {
-      emit_lithdr_incidx(c, dynidx(c, indices_key), elem, st);
+      emit_lithdr_incidx(exec_ctx, c, dynidx(c, indices_key), elem, st);
       add_elem(exec_ctx, c, elem);
       return;
     } else {
-      emit_lithdr_noidx(c, dynidx(c, indices_key), elem, st);
+      emit_lithdr_noidx(exec_ctx, c, dynidx(c, indices_key), elem, st);
       return;
     }
     GPR_UNREACHABLE_CODE(return );
@@ -501,11 +521,11 @@ static void hpack_enc(grpc_exec_ctx *exec_ctx, grpc_chttp2_hpack_compressor *c,
   /* no elem, key in the table... fall back to literal emission */
 
   if (should_add_elem) {
-    emit_lithdr_incidx_v(c, elem, st);
+    emit_lithdr_incidx_v(exec_ctx, c, elem, st);
     add_elem(exec_ctx, c, elem);
     return;
   } else {
-    emit_lithdr_noidx_v(c, elem, st);
+    emit_lithdr_noidx_v(exec_ctx, c, elem, st);
     return;
   }
   GPR_UNREACHABLE_CODE(return );
diff --git a/src/core/ext/transport/chttp2/transport/hpack_parser.c b/src/core/ext/transport/chttp2/transport/hpack_parser.c
index 82ff2c8e2c..3d1df19bc3 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_parser.c
+++ b/src/core/ext/transport/chttp2/transport/hpack_parser.c
@@ -30,6 +30,7 @@
 #include <grpc/support/useful.h>
 
 #include "src/core/ext/transport/chttp2/transport/bin_encoder.h"
+#include "src/core/lib/debug/stats.h"
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/support/string.h"
@@ -777,8 +778,7 @@ static grpc_error *parse_stream_dep0(grpc_exec_ctx *exec_ctx,
   return parse_stream_dep1(exec_ctx, p, cur + 1, end);
 }
 
-/* emit an indexed field; for now just logs it to console; jumps to
-   begin the next field on completion */
+/* 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,
                                         const uint8_t *cur,
@@ -792,6 +792,7 @@ 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);
   if (err != GRPC_ERROR_NONE) return err;
   return parse_begin(exec_ctx, p, cur, end);
@@ -820,14 +821,14 @@ static grpc_error *parse_indexed_field_x(grpc_exec_ctx *exec_ctx,
   return parse_value0(exec_ctx, p, cur + 1, end);
 }
 
-/* finish a literal header with incremental indexing: just log, and jump to '
-   begin */
+/* finish a literal header with incremental indexing */
 static grpc_error *finish_lithdr_incidx(grpc_exec_ctx *exec_ctx,
                                         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)),
@@ -842,6 +843,7 @@ static grpc_error *finish_lithdr_incidx_v(grpc_exec_ctx *exec_ctx,
                                           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),
@@ -898,6 +900,7 @@ static grpc_error *finish_lithdr_notidx(grpc_exec_ctx *exec_ctx,
                                         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)),
@@ -912,6 +915,7 @@ static grpc_error *finish_lithdr_notidx_v(grpc_exec_ctx *exec_ctx,
                                           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),
@@ -968,6 +972,7 @@ static grpc_error *finish_lithdr_nvridx(grpc_exec_ctx *exec_ctx,
                                         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)),
@@ -982,6 +987,7 @@ static grpc_error *finish_lithdr_nvridx_v(grpc_exec_ctx *exec_ctx,
                                           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),
@@ -1310,9 +1316,11 @@ 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);
         append_bytes(str, cur, (size_t)(end - cur));
         return GRPC_ERROR_NONE;
       }
+      GRPC_STATS_INC_HPACK_RECV_BINARY_BASE64(exec_ctx);
     /* fallthrough */
     b64_byte0:
     case B64_BYTE0:
@@ -1510,6 +1518,7 @@ static grpc_error *begin_parse_string(grpc_exec_ctx *exec_ctx,
                                       grpc_chttp2_hpack_parser_string *str) {
   if (!p->huff && binary == NOT_BINARY && (end - cur) >= (intptr_t)p->strlen &&
       p->current_slice_refcount != NULL) {
+    GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED(exec_ctx);
     str->copied = false;
     str->data.referenced.refcount = p->current_slice_refcount;
     str->data.referenced.data.refcounted.bytes = (uint8_t *)cur;
@@ -1523,6 +1532,20 @@ static grpc_error *begin_parse_string(grpc_exec_ctx *exec_ctx,
   p->parsing.str = str;
   p->huff_state = 0;
   p->binary = binary;
+  switch (p->binary) {
+    case NOT_BINARY:
+      if (p->huff) {
+        GRPC_STATS_INC_HPACK_RECV_HUFFMAN(exec_ctx);
+      } else {
+        GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED(exec_ctx);
+      }
+      break;
+    case BINARY_BEGIN:
+      /* stats incremented later: don't know true binary or not */
+      break;
+    default:
+      abort();
+  }
   return parse_string(exec_ctx, p, cur, end);
 }
 
@@ -1649,7 +1672,8 @@ static void force_client_rst_stream(grpc_exec_ctx *exec_ctx, void *sp,
     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, "force_rst_stream");
+    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_STREAM_UNREF(exec_ctx, s, "final_rst");
@@ -1659,17 +1683,12 @@ static void parse_stream_compression_md(grpc_exec_ctx *exec_ctx,
                                         grpc_chttp2_transport *t,
                                         grpc_chttp2_stream *s,
                                         grpc_metadata_batch *initial_metadata) {
-  if (initial_metadata->idx.named.content_encoding != NULL) {
-    grpc_slice content_encoding =
-        GRPC_MDVALUE(initial_metadata->idx.named.content_encoding->md);
-    if (!grpc_slice_eq(content_encoding, GRPC_MDSTR_IDENTITY)) {
-      if (grpc_slice_eq(content_encoding, GRPC_MDSTR_GZIP)) {
-        s->stream_compression_recv_enabled = true;
-        s->decompressed_data_buffer =
-            (grpc_slice_buffer *)gpr_malloc(sizeof(grpc_slice_buffer));
-        grpc_slice_buffer_init(s->decompressed_data_buffer);
-      }
-    }
+  if (initial_metadata->idx.named.content_encoding == NULL ||
+      grpc_stream_compression_method_parse(
+          GRPC_MDVALUE(initial_metadata->idx.named.content_encoding->md), false,
+          &s->stream_decompression_method) == 0) {
+    s->stream_decompression_method =
+        GRPC_STREAM_COMPRESSION_IDENTITY_DECOMPRESS;
   }
 }
 
diff --git a/src/core/ext/transport/chttp2/transport/incoming_metadata.c b/src/core/ext/transport/chttp2/transport/incoming_metadata.c
index cf0a9ca920..ba680a89db 100644
--- a/src/core/ext/transport/chttp2/transport/incoming_metadata.c
+++ b/src/core/ext/transport/chttp2/transport/incoming_metadata.c
@@ -42,8 +42,9 @@ grpc_error *grpc_chttp2_incoming_metadata_buffer_add(
     grpc_mdelem elem) {
   buffer->size += GRPC_MDELEM_LENGTH(elem);
   return grpc_metadata_batch_add_tail(
-      exec_ctx, &buffer->batch,
-      gpr_arena_alloc(buffer->arena, sizeof(grpc_linked_mdelem)), elem);
+      exec_ctx, &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(
diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h
index 0fbedd1e56..49022155aa 100644
--- a/src/core/ext/transport/chttp2/transport/internal.h
+++ b/src/core/ext/transport/chttp2/transport/internal.h
@@ -79,16 +79,43 @@ typedef enum {
   GRPC_CHTTP2_PCL_COUNT /* must be last */
 } grpc_chttp2_ping_closure_list;
 
+typedef enum {
+  GRPC_CHTTP2_INITIATE_WRITE_INITIAL_WRITE,
+  GRPC_CHTTP2_INITIATE_WRITE_START_NEW_STREAM,
+  GRPC_CHTTP2_INITIATE_WRITE_SEND_MESSAGE,
+  GRPC_CHTTP2_INITIATE_WRITE_SEND_INITIAL_METADATA,
+  GRPC_CHTTP2_INITIATE_WRITE_SEND_TRAILING_METADATA,
+  GRPC_CHTTP2_INITIATE_WRITE_RETRY_SEND_PING,
+  GRPC_CHTTP2_INITIATE_WRITE_CONTINUE_PINGS,
+  GRPC_CHTTP2_INITIATE_WRITE_GOAWAY_SENT,
+  GRPC_CHTTP2_INITIATE_WRITE_RST_STREAM,
+  GRPC_CHTTP2_INITIATE_WRITE_CLOSE_FROM_API,
+  GRPC_CHTTP2_INITIATE_WRITE_STREAM_FLOW_CONTROL,
+  GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL,
+  GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS,
+  GRPC_CHTTP2_INITIATE_WRITE_BDP_ESTIMATOR_PING,
+  GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_SETTING,
+  GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_UPDATE,
+  GRPC_CHTTP2_INITIATE_WRITE_APPLICATION_PING,
+  GRPC_CHTTP2_INITIATE_WRITE_KEEPALIVE_PING,
+  GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL_UNSTALLED,
+  GRPC_CHTTP2_INITIATE_WRITE_PING_RESPONSE,
+  GRPC_CHTTP2_INITIATE_WRITE_FORCE_RST_STREAM,
+} grpc_chttp2_initiate_write_reason;
+
+const char *grpc_chttp2_initiate_write_reason_string(
+    grpc_chttp2_initiate_write_reason reason);
+
 typedef struct {
   grpc_closure_list lists[GRPC_CHTTP2_PCL_COUNT];
   uint64_t inflight_id;
 } grpc_chttp2_ping_queue;
 
 typedef struct {
-  gpr_timespec min_time_between_pings;
   int max_pings_without_data;
   int max_ping_strikes;
-  gpr_timespec min_ping_interval_without_data;
+  gpr_timespec min_sent_ping_interval_without_data;
+  gpr_timespec min_recv_ping_interval_without_data;
 } grpc_chttp2_repeated_ping_policy;
 
 typedef struct {
@@ -565,25 +592,27 @@ struct grpc_chttp2_stream {
   grpc_chttp2_write_cb *finish_after_write;
   size_t sending_bytes;
 
-  /** Whether stream compression send is enabled */
-  bool stream_compression_recv_enabled;
-  /** Whether stream compression recv is enabled */
-  bool stream_compression_send_enabled;
-  /** Whether bytes stored in unprocessed_incoming_byte_stream is decompressed
-   */
-  bool unprocessed_incoming_frames_decompressed;
+  /* Stream compression method to be used. */
+  grpc_stream_compression_method stream_compression_method;
+  /* Stream decompression method to be used. */
+  grpc_stream_compression_method stream_decompression_method;
   /** Stream compression decompress context */
   grpc_stream_compression_context *stream_decompression_ctx;
   /** Stream compression compress context */
   grpc_stream_compression_context *stream_compression_ctx;
 
   /** Buffer storing data that is compressed but not sent */
-  grpc_slice_buffer *compressed_data_buffer;
+  grpc_slice_buffer compressed_data_buffer;
   /** Amount of uncompressed bytes sent out when compressed_data_buffer is
    * emptied */
   size_t uncompressed_data_size;
   /** Temporary buffer storing decompressed data */
-  grpc_slice_buffer *decompressed_data_buffer;
+  grpc_slice_buffer decompressed_data_buffer;
+  /** Whether bytes stored in unprocessed_incoming_byte_stream is decompressed
+   */
+  bool unprocessed_incoming_frames_decompressed;
+  /** gRPC header bytes that are already decompressed */
+  size_t decompressed_header_bytes;
 };
 
 /** Transport writing call flow:
@@ -599,7 +628,8 @@ 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, const char *reason);
+                                grpc_chttp2_transport *t,
+                                grpc_chttp2_initiate_write_reason reason);
 
 typedef struct {
   /** are we writing? */
@@ -851,10 +881,9 @@ void grpc_chttp2_add_ping_strike(grpc_exec_ctx *exec_ctx,
 
 /** add a ref to the stream and add it to the writable list;
     ref will be dropped in writing.c */
-void grpc_chttp2_become_writable(grpc_exec_ctx *exec_ctx,
-                                 grpc_chttp2_transport *t,
-                                 grpc_chttp2_stream *s,
-                                 bool also_initiate_write, const char *reason);
+void grpc_chttp2_mark_stream_writable(grpc_exec_ctx *exec_ctx,
+                                      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,
diff --git a/src/core/ext/transport/chttp2/transport/parsing.c b/src/core/ext/transport/chttp2/transport/parsing.c
index 6c12c91365..3db1ad4123 100644
--- a/src/core/ext/transport/chttp2/transport/parsing.c
+++ b/src/core/ext/transport/chttp2/transport/parsing.c
@@ -383,6 +383,9 @@ error_handler:
     /* t->parser = grpc_chttp2_data_parser_parse;*/
     t->parser = grpc_chttp2_data_parser_parse;
     t->parser_data = &s->data_parser;
+    t->ping_state.pings_before_data_required =
+        t->ping_policy.max_pings_without_data;
+    t->ping_state.last_ping_sent_time = gpr_inf_past(GPR_CLOCK_MONOTONIC);
     return GRPC_ERROR_NONE;
   } else if (grpc_error_get_int(err, GRPC_ERROR_INT_STREAM_ID, NULL)) {
     /* handle stream errors by closing the stream */
@@ -559,6 +562,10 @@ static grpc_error *init_header_frame_parser(grpc_exec_ctx *exec_ctx,
         (t->incoming_frame_flags & GRPC_CHTTP2_DATA_FLAG_END_STREAM) != 0;
   }
 
+  t->ping_state.pings_before_data_required =
+      t->ping_policy.max_pings_without_data;
+  t->ping_state.last_ping_sent_time = gpr_inf_past(GPR_CLOCK_MONOTONIC);
+
   /* could be a new grpc_chttp2_stream or an existing grpc_chttp2_stream */
   s = grpc_chttp2_parsing_lookup_stream(t, t->incoming_stream_id);
   if (s == NULL) {
diff --git a/src/core/ext/transport/chttp2/transport/stream_lists.c b/src/core/ext/transport/chttp2/transport/stream_lists.c
index 7cc85dea9c..47cd22d177 100644
--- a/src/core/ext/transport/chttp2/transport/stream_lists.c
+++ b/src/core/ext/transport/chttp2/transport/stream_lists.c
@@ -20,6 +20,27 @@
 
 #include <grpc/support/log.h>
 
+static char *stream_list_id_string(grpc_chttp2_stream_list_id id) {
+  switch (id) {
+    case GRPC_CHTTP2_LIST_WRITABLE:
+      return "writable";
+    case GRPC_CHTTP2_LIST_WRITING:
+      return "writing";
+    case GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT:
+      return "stalled_by_transport";
+    case GRPC_CHTTP2_LIST_STALLED_BY_STREAM:
+      return "stalled_by_stream";
+    case GRPC_CHTTP2_LIST_WAITING_FOR_CONCURRENCY:
+      return "waiting_for_concurrency";
+    case STREAM_LIST_COUNT:
+      GPR_UNREACHABLE_CODE(return "unknown");
+  }
+  GPR_UNREACHABLE_CODE(return "unknown");
+}
+
+grpc_tracer_flag grpc_trace_http2_stream_state =
+    GRPC_TRACER_INITIALIZER(false, "http2_stream_state");
+
 /* core list management */
 
 static bool stream_list_empty(grpc_chttp2_transport *t,
@@ -44,6 +65,10 @@ static bool stream_list_pop(grpc_chttp2_transport *t,
     s->included[id] = 0;
   }
   *stream = s;
+  if (s && GRPC_TRACER_ON(grpc_trace_http2_stream_state)) {
+    gpr_log(GPR_DEBUG, "%p[%d][%s]: pop from %s", t, s->id,
+            t->is_client ? "cli" : "svr", stream_list_id_string(id));
+  }
   return s != 0;
 }
 
@@ -62,6 +87,10 @@ static void stream_list_remove(grpc_chttp2_transport *t, grpc_chttp2_stream *s,
   } else {
     t->lists[id].tail = s->links[id].prev;
   }
+  if (GRPC_TRACER_ON(grpc_trace_http2_stream_state)) {
+    gpr_log(GPR_DEBUG, "%p[%d][%s]: remove from %s", t, s->id,
+            t->is_client ? "cli" : "svr", stream_list_id_string(id));
+  }
 }
 
 static bool stream_list_maybe_remove(grpc_chttp2_transport *t,
@@ -90,6 +119,10 @@ static void stream_list_add_tail(grpc_chttp2_transport *t,
   }
   t->lists[id].tail = s;
   s->included[id] = 1;
+  if (GRPC_TRACER_ON(grpc_trace_http2_stream_state)) {
+    gpr_log(GPR_DEBUG, "%p[%d][%s]: add to %s", t, s->id,
+            t->is_client ? "cli" : "svr", stream_list_id_string(id));
+  }
 }
 
 static bool stream_list_add(grpc_chttp2_transport *t, grpc_chttp2_stream *s,
@@ -150,17 +183,12 @@ void grpc_chttp2_list_remove_waiting_for_concurrency(grpc_chttp2_transport *t,
 
 void grpc_chttp2_list_add_stalled_by_transport(grpc_chttp2_transport *t,
                                                grpc_chttp2_stream *s) {
-  GRPC_FLOW_CONTROL_IF_TRACING(
-      gpr_log(GPR_DEBUG, "stream %u stalled by transport", s->id));
   stream_list_add(t, s, GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT);
 }
 
 bool grpc_chttp2_list_pop_stalled_by_transport(grpc_chttp2_transport *t,
                                                grpc_chttp2_stream **s) {
-  bool ret = stream_list_pop(t, s, GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT);
-  GRPC_FLOW_CONTROL_IF_TRACING(if (ret) gpr_log(
-      GPR_DEBUG, "stream %u un-stalled by transport", (*s)->id));
-  return ret;
+  return stream_list_pop(t, s, GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT);
 }
 
 void grpc_chttp2_list_remove_stalled_by_transport(grpc_chttp2_transport *t,
@@ -170,23 +198,15 @@ void grpc_chttp2_list_remove_stalled_by_transport(grpc_chttp2_transport *t,
 
 void grpc_chttp2_list_add_stalled_by_stream(grpc_chttp2_transport *t,
                                             grpc_chttp2_stream *s) {
-  GRPC_FLOW_CONTROL_IF_TRACING(
-      gpr_log(GPR_DEBUG, "stream %u stalled by stream", s->id));
   stream_list_add(t, s, GRPC_CHTTP2_LIST_STALLED_BY_STREAM);
 }
 
 bool grpc_chttp2_list_pop_stalled_by_stream(grpc_chttp2_transport *t,
                                             grpc_chttp2_stream **s) {
-  bool ret = stream_list_pop(t, s, GRPC_CHTTP2_LIST_STALLED_BY_STREAM);
-  GRPC_FLOW_CONTROL_IF_TRACING(
-      if (ret) gpr_log(GPR_DEBUG, "stream %u un-stalled by stream", (*s)->id));
-  return ret;
+  return stream_list_pop(t, s, GRPC_CHTTP2_LIST_STALLED_BY_STREAM);
 }
 
 bool grpc_chttp2_list_remove_stalled_by_stream(grpc_chttp2_transport *t,
                                                grpc_chttp2_stream *s) {
-  bool ret = stream_list_maybe_remove(t, s, GRPC_CHTTP2_LIST_STALLED_BY_STREAM);
-  GRPC_FLOW_CONTROL_IF_TRACING(
-      if (ret) gpr_log(GPR_DEBUG, "stream %u un-stalled by stream", s->id));
-  return ret;
+  return stream_list_maybe_remove(t, s, GRPC_CHTTP2_LIST_STALLED_BY_STREAM);
 }
diff --git a/src/core/ext/transport/chttp2/transport/stream_map.c b/src/core/ext/transport/chttp2/transport/stream_map.c
index 650090d8f0..d6079a9a33 100644
--- a/src/core/ext/transport/chttp2/transport/stream_map.c
+++ b/src/core/ext/transport/chttp2/transport/stream_map.c
@@ -72,8 +72,10 @@ void grpc_chttp2_stream_map_add(grpc_chttp2_stream_map *map, uint32_t key,
       /* resize when less than 25% of the table is free, because compaction
          won't help much */
       map->capacity = capacity = 3 * capacity / 2;
-      map->keys = keys = gpr_realloc(keys, capacity * sizeof(uint32_t));
-      map->values = values = gpr_realloc(values, capacity * sizeof(void *));
+      map->keys = keys =
+          (uint32_t *)gpr_realloc(keys, capacity * sizeof(uint32_t));
+      map->values = values =
+          (void **)gpr_realloc(values, capacity * sizeof(void *));
     }
   }
 
diff --git a/src/core/ext/transport/chttp2/transport/writing.c b/src/core/ext/transport/chttp2/transport/writing.c
index fa224a49a4..be1af16019 100644
--- a/src/core/ext/transport/chttp2/transport/writing.c
+++ b/src/core/ext/transport/chttp2/transport/writing.c
@@ -68,7 +68,7 @@ static void maybe_initiate_ping(grpc_exec_ctx *exec_ctx,
   }
   if (t->ping_state.pings_before_data_required == 0 &&
       t->ping_policy.max_pings_without_data != 0) {
-    /* need to send something of substance before sending a ping again */
+    /* need to receive something of substance before sending a ping again */
     if (GRPC_TRACER_ON(grpc_http_trace) ||
         GRPC_TRACER_ON(grpc_bdp_estimator_trace)) {
       gpr_log(GPR_DEBUG, "Ping delayed [%p]: too many recent pings: %d/%d",
@@ -78,11 +78,18 @@ static void maybe_initiate_ping(grpc_exec_ctx *exec_ctx,
     return;
   }
   gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
-  gpr_timespec elapsed = gpr_time_sub(now, t->ping_state.last_ping_sent_time);
-  /*gpr_log(GPR_DEBUG, "elapsed:%d.%09d min:%d.%09d", (int)elapsed.tv_sec,
-          elapsed.tv_nsec, (int)t->ping_policy.min_time_between_pings.tv_sec,
-          (int)t->ping_policy.min_time_between_pings.tv_nsec);*/
-  if (gpr_time_cmp(elapsed, t->ping_policy.min_time_between_pings) < 0) {
+  gpr_timespec next_allowed_ping =
+      gpr_time_add(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 = gpr_time_add(t->ping_recv_state.last_ping_recv_time,
+                                     gpr_time_from_seconds(7200, GPR_TIMESPAN));
+  }
+  /* gpr_log(GPR_DEBUG, "next_allowed_ping:%d.%09d now:%d.%09d",
+          (int)next_allowed_ping.tv_sec, (int)next_allowed_ping.tv_nsec,
+          (int)now.tv_sec, (int)now.tv_nsec); */
+  if (gpr_time_cmp(next_allowed_ping, now) > 0) {
     /* not enough elapsed time between successive pings */
     if (GRPC_TRACER_ON(grpc_http_trace) ||
         GRPC_TRACER_ON(grpc_bdp_estimator_trace)) {
@@ -93,9 +100,7 @@ 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,
-                      gpr_time_add(t->ping_state.last_ping_sent_time,
-                                   t->ping_policy.min_time_between_pings),
-                      &t->retry_initiate_ping_locked,
+                      next_allowed_ping, &t->retry_initiate_ping_locked,
                       gpr_now(GPR_CLOCK_MONOTONIC));
     }
     return;
@@ -119,6 +124,12 @@ static void maybe_initiate_ping(grpc_exec_ctx *exec_ctx,
                         grpc_chttp2_ping_create(false, pq->inflight_id));
   GRPC_STATS_INC_HTTP2_PINGS_SENT(exec_ctx);
   t->ping_state.last_ping_sent_time = now;
+  if (GRPC_TRACER_ON(grpc_http_trace) ||
+      GRPC_TRACER_ON(grpc_bdp_estimator_trace)) {
+    gpr_log(GPR_DEBUG, "Ping sent [%p]: %d/%d", t->peer_string,
+            t->ping_state.pings_before_data_required,
+            t->ping_policy.max_pings_without_data);
+  }
   t->ping_state.pings_before_data_required -=
       (t->ping_state.pings_before_data_required != 0);
 }
@@ -201,9 +212,8 @@ grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
 
   if (t->flow_control.remote_window > 0) {
     while (grpc_chttp2_list_pop_stalled_by_transport(t, &s)) {
-      if (!t->closed && grpc_chttp2_list_add_writable_stream(t, s) &&
-          stream_ref_if_not_destroyed(&s->refcount->refs)) {
-        grpc_chttp2_initiate_write(exec_ctx, t, "transport.read_flow_control");
+      if (!t->closed && grpc_chttp2_list_add_writable_stream(t, s)) {
+        stream_ref_if_not_destroyed(&s->refcount->refs);
       }
     }
   }
@@ -258,8 +268,7 @@ grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
             .stats = &s->stats.outgoing};
         grpc_chttp2_encode_header(exec_ctx, &t->hpack_compressor, NULL, 0,
                                   s->send_initial_metadata, &hopt, &t->outbuf);
-        t->ping_state.pings_before_data_required =
-            t->ping_policy.max_pings_without_data;
+        now_writing = true;
         if (!t->is_client) {
           t->ping_recv_state.last_ping_recv_time =
               gpr_inf_past(GPR_CLOCK_MONOTONIC);
@@ -298,8 +307,6 @@ grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
       grpc_slice_buffer_add(
           &t->outbuf, grpc_chttp2_window_update_create(s->id, stream_announce,
                                                        &s->stats.outgoing));
-      t->ping_state.pings_before_data_required =
-          t->ping_policy.max_pings_without_data;
       if (!t->is_client) {
         t->ping_recv_state.last_ping_recv_time =
             gpr_inf_past(GPR_CLOCK_MONOTONIC);
@@ -310,8 +317,7 @@ grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
     if (sent_initial_metadata) {
       /* send any body bytes, if allowed by flow control */
       if (s->flow_controlled_buffer.length > 0 ||
-          (s->stream_compression_send_enabled &&
-           s->compressed_data_buffer->length > 0)) {
+          s->compressed_data_buffer.length > 0) {
         uint32_t stream_remote_window = (uint32_t)GPR_MAX(
             0,
             s->flow_control.remote_window_delta +
@@ -325,59 +331,60 @@ grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
           bool is_last_data_frame = false;
           bool is_last_frame = false;
           size_t sending_bytes_before = s->sending_bytes;
-          if (s->stream_compression_send_enabled) {
-            while ((s->flow_controlled_buffer.length > 0 ||
-                    s->compressed_data_buffer->length > 0) &&
-                   max_outgoing > 0) {
-              if (s->compressed_data_buffer->length > 0) {
-                uint32_t send_bytes = (uint32_t)GPR_MIN(
-                    max_outgoing, s->compressed_data_buffer->length);
-                is_last_data_frame =
-                    (send_bytes == s->compressed_data_buffer->length &&
-                     s->flow_controlled_buffer.length == 0 &&
-                     s->fetching_send_message == NULL);
-                is_last_frame =
-                    is_last_data_frame && s->send_trailing_metadata != NULL &&
-                    grpc_metadata_batch_is_empty(s->send_trailing_metadata);
-                grpc_chttp2_encode_data(s->id, s->compressed_data_buffer,
-                                        send_bytes, is_last_frame,
-                                        &s->stats.outgoing, &t->outbuf);
-                grpc_chttp2_flowctl_sent_data(&t->flow_control,
-                                              &s->flow_control, send_bytes);
-                max_outgoing -= send_bytes;
-                if (s->compressed_data_buffer->length == 0) {
-                  s->sending_bytes += s->uncompressed_data_size;
-                }
-              } else {
-                if (s->stream_compression_ctx == NULL) {
-                  s->stream_compression_ctx =
-                      grpc_stream_compression_context_create(
-                          GRPC_STREAM_COMPRESSION_COMPRESS);
+          while ((s->flow_controlled_buffer.length > 0 ||
+                  s->compressed_data_buffer.length > 0) &&
+                 max_outgoing > 0) {
+            if (s->compressed_data_buffer.length > 0) {
+              uint32_t send_bytes = (uint32_t)GPR_MIN(
+                  max_outgoing, s->compressed_data_buffer.length);
+              is_last_data_frame =
+                  (send_bytes == s->compressed_data_buffer.length &&
+                   s->flow_controlled_buffer.length == 0 &&
+                   s->fetching_send_message == NULL);
+              if (is_last_data_frame && s->send_trailing_metadata != NULL &&
+                  s->stream_compression_ctx != NULL) {
+                if (!grpc_stream_compress(
+                        s->stream_compression_ctx, &s->flow_controlled_buffer,
+                        &s->compressed_data_buffer, NULL, MAX_SIZE_T,
+                        GRPC_STREAM_COMPRESSION_FLUSH_FINISH)) {
+                  gpr_log(GPR_ERROR, "Stream compression failed.");
                 }
-                s->uncompressed_data_size = s->flow_controlled_buffer.length;
-                GPR_ASSERT(grpc_stream_compress(
-                    s->stream_compression_ctx, &s->flow_controlled_buffer,
-                    s->compressed_data_buffer, NULL, MAX_SIZE_T,
-                    GRPC_STREAM_COMPRESSION_FLUSH_SYNC));
+                grpc_stream_compression_context_destroy(
+                    s->stream_compression_ctx);
+                s->stream_compression_ctx = NULL;
+                /* After finish, bytes in s->compressed_data_buffer may be
+                 * more than max_outgoing. Start another round of the current
+                 * while loop so that send_bytes and is_last_data_frame are
+                 * recalculated. */
+                continue;
+              }
+              is_last_frame =
+                  is_last_data_frame && s->send_trailing_metadata != NULL &&
+                  grpc_metadata_batch_is_empty(s->send_trailing_metadata);
+              grpc_chttp2_encode_data(s->id, &s->compressed_data_buffer,
+                                      send_bytes, is_last_frame,
+                                      &s->stats.outgoing, &t->outbuf);
+              grpc_chttp2_flowctl_sent_data(&t->flow_control, &s->flow_control,
+                                            send_bytes);
+              max_outgoing -= send_bytes;
+              if (s->compressed_data_buffer.length == 0) {
+                s->sending_bytes += s->uncompressed_data_size;
+              }
+            } else {
+              if (s->stream_compression_ctx == NULL) {
+                s->stream_compression_ctx =
+                    grpc_stream_compression_context_create(
+                        s->stream_compression_method);
+              }
+              s->uncompressed_data_size = s->flow_controlled_buffer.length;
+              if (!grpc_stream_compress(
+                      s->stream_compression_ctx, &s->flow_controlled_buffer,
+                      &s->compressed_data_buffer, NULL, MAX_SIZE_T,
+                      GRPC_STREAM_COMPRESSION_FLUSH_SYNC)) {
+                gpr_log(GPR_ERROR, "Stream compression failed.");
               }
             }
-          } else {
-            uint32_t send_bytes = (uint32_t)GPR_MIN(
-                max_outgoing, s->flow_controlled_buffer.length);
-            is_last_data_frame = s->fetching_send_message == NULL &&
-                                 send_bytes == s->flow_controlled_buffer.length;
-            is_last_frame =
-                is_last_data_frame && s->send_trailing_metadata != NULL &&
-                grpc_metadata_batch_is_empty(s->send_trailing_metadata);
-            grpc_chttp2_encode_data(s->id, &s->flow_controlled_buffer,
-                                    send_bytes, is_last_frame,
-                                    &s->stats.outgoing, &t->outbuf);
-            grpc_chttp2_flowctl_sent_data(&t->flow_control, &s->flow_control,
-                                          send_bytes);
-            s->sending_bytes += send_bytes;
           }
-          t->ping_state.pings_before_data_required =
-              t->ping_policy.max_pings_without_data;
           if (!t->is_client) {
             t->ping_recv_state.last_ping_recv_time =
                 gpr_inf_past(GPR_CLOCK_MONOTONIC);
@@ -391,6 +398,8 @@ grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
                                                     s->id, GRPC_HTTP2_NO_ERROR,
                                                     &s->stats.outgoing));
             }
+            grpc_chttp2_mark_stream_closed(exec_ctx, t, s, !t->is_client, 1,
+                                           GRPC_ERROR_NONE);
           }
           result.early_results_scheduled |=
               update_list(exec_ctx, t, s,
@@ -399,8 +408,7 @@ grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
                           &s->flow_controlled_bytes_flowed, GRPC_ERROR_NONE);
           now_writing = true;
           if (s->flow_controlled_buffer.length > 0 ||
-              (s->stream_compression_send_enabled &&
-               s->compressed_data_buffer->length > 0)) {
+              s->compressed_data_buffer.length > 0) {
             GRPC_CHTTP2_STREAM_REF(s, "chttp2_writing:fork");
             grpc_chttp2_list_add_writable_stream(t, s);
           }
@@ -416,8 +424,7 @@ grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
       if (s->send_trailing_metadata != NULL &&
           s->fetching_send_message == NULL &&
           s->flow_controlled_buffer.length == 0 &&
-          (!s->stream_compression_send_enabled ||
-           s->compressed_data_buffer->length == 0)) {
+          s->compressed_data_buffer.length == 0) {
         GRPC_CHTTP2_IF_TRACING(gpr_log(GPR_INFO, "sending trailing_metadata"));
         if (grpc_metadata_batch_is_empty(s->send_trailing_metadata)) {
           grpc_chttp2_encode_data(s->id, &s->flow_controlled_buffer, 0, true,
@@ -449,6 +456,8 @@ grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
               &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, 1,
+                                       GRPC_ERROR_NONE);
         now_writing = true;
         result.early_results_scheduled = true;
         grpc_chttp2_complete_closure_step(
@@ -484,8 +493,6 @@ grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
     grpc_slice_buffer_add(
         &t->outbuf, grpc_chttp2_window_update_create(0, transport_announce,
                                                      &throwaway_stats));
-    t->ping_state.pings_before_data_required =
-        t->ping_policy.max_pings_without_data;
     if (!t->is_client) {
       t->ping_recv_state.last_ping_recv_time =
           gpr_inf_past(GPR_CLOCK_MONOTONIC);
@@ -519,10 +526,6 @@ void grpc_chttp2_end_write(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
                   GRPC_ERROR_REF(error));
       s->sending_bytes = 0;
     }
-    if (s->sent_trailing_metadata) {
-      grpc_chttp2_mark_stream_closed(exec_ctx, t, s, !t->is_client, 1,
-                                     GRPC_ERROR_REF(error));
-    }
     GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2_writing:end");
   }
   grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &t->outbuf);
diff --git a/src/core/ext/transport/inproc/inproc_transport.c b/src/core/ext/transport/inproc/inproc_transport.c
index 036853a53b..31739d07dd 100644
--- a/src/core/ext/transport/inproc/inproc_transport.c
+++ b/src/core/ext/transport/inproc/inproc_transport.c
@@ -37,7 +37,6 @@
     if (GRPC_TRACER_ON(grpc_inproc_trace)) gpr_log(__VA_ARGS__); \
   } while (0)
 
-static const grpc_transport_vtable inproc_vtable;
 static grpc_slice g_empty_slice;
 static grpc_slice g_fake_path_key;
 static grpc_slice g_fake_path_value;
@@ -1167,6 +1166,55 @@ static void destroy_transport(grpc_exec_ctx *exec_ctx, grpc_transport *gt) {
 }
 
 /*******************************************************************************
+ * INTEGRATION GLUE
+ */
+
+static void set_pollset(grpc_exec_ctx *exec_ctx, 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) {
+  // Nothing to do here
+}
+
+static grpc_endpoint *get_endpoint(grpc_exec_ctx *exec_ctx, grpc_transport *t) {
+  return NULL;
+}
+
+/*******************************************************************************
+ * GLOBAL INIT AND DESTROY
+ */
+static void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {}
+
+void grpc_inproc_transport_init(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  GRPC_CLOSURE_INIT(&do_nothing_closure, do_nothing, NULL,
+                    grpc_schedule_on_exec_ctx);
+  g_empty_slice = grpc_slice_from_static_buffer(NULL, 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);
+
+  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);
+
+  g_fake_auth_value = grpc_slice_from_static_string("inproc-fail");
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+static const grpc_transport_vtable inproc_vtable = {
+    sizeof(inproc_stream), "inproc",        init_stream,
+    set_pollset,           set_pollset_set, perform_stream_op,
+    perform_transport_op,  destroy_stream,  destroy_transport,
+    get_endpoint};
+
+/*******************************************************************************
  * Main inproc transport functions
  */
 static void inproc_transports_create(grpc_exec_ctx *exec_ctx,
@@ -1178,7 +1226,7 @@ static void inproc_transports_create(grpc_exec_ctx *exec_ctx,
   inproc_transport *st = (inproc_transport *)gpr_zalloc(sizeof(*st));
   inproc_transport *ct = (inproc_transport *)gpr_zalloc(sizeof(*ct));
   // Share one lock between both sides since both sides get affected
-  st->mu = ct->mu = gpr_malloc(sizeof(*st->mu));
+  st->mu = ct->mu = (shared_mu *)gpr_malloc(sizeof(*st->mu));
   gpr_mu_init(&st->mu->mu);
   gpr_ref_init(&st->mu->refs, 2);
   st->base.vtable = &inproc_vtable;
@@ -1215,8 +1263,8 @@ grpc_channel *grpc_inproc_channel_create(grpc_server *server,
 
   grpc_arg default_authority_arg;
   default_authority_arg.type = GRPC_ARG_STRING;
-  default_authority_arg.key = GRPC_ARG_DEFAULT_AUTHORITY;
-  default_authority_arg.value.string = "inproc.authority";
+  default_authority_arg.key = (char *)GRPC_ARG_DEFAULT_AUTHORITY;
+  default_authority_arg.value.string = (char *)"inproc.authority";
   grpc_channel_args *client_args =
       grpc_channel_args_copy_and_add(args, &default_authority_arg, 1);
 
@@ -1240,55 +1288,6 @@ grpc_channel *grpc_inproc_channel_create(grpc_server *server,
   return channel;
 }
 
-/*******************************************************************************
- * INTEGRATION GLUE
- */
-
-static void set_pollset(grpc_exec_ctx *exec_ctx, 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) {
-  // Nothing to do here
-}
-
-static grpc_endpoint *get_endpoint(grpc_exec_ctx *exec_ctx, grpc_transport *t) {
-  return NULL;
-}
-
-static const grpc_transport_vtable inproc_vtable = {
-    sizeof(inproc_stream), "inproc",        init_stream,
-    set_pollset,           set_pollset_set, perform_stream_op,
-    perform_transport_op,  destroy_stream,  destroy_transport,
-    get_endpoint};
-
-/*******************************************************************************
- * GLOBAL INIT AND DESTROY
- */
-static void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {}
-
-void grpc_inproc_transport_init(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_CLOSURE_INIT(&do_nothing_closure, do_nothing, NULL,
-                    grpc_schedule_on_exec_ctx);
-  g_empty_slice = grpc_slice_from_static_buffer(NULL, 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);
-
-  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);
-
-  g_fake_auth_value = grpc_slice_from_static_string("inproc-fail");
-  grpc_exec_ctx_finish(&exec_ctx);
-}
-
 void grpc_inproc_transport_shutdown(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_slice_unref_internal(&exec_ctx, g_empty_slice);
diff --git a/src/core/lib/channel/channel_args.c b/src/core/lib/channel/channel_args.c
index 6cf0de8529..69980586aa 100644
--- a/src/core/lib/channel/channel_args.c
+++ b/src/core/lib/channel/channel_args.c
@@ -212,7 +212,7 @@ void grpc_channel_args_destroy(grpc_exec_ctx *exec_ctx, grpc_channel_args *a) {
 grpc_compression_algorithm grpc_channel_args_get_compression_algorithm(
     const grpc_channel_args *a) {
   size_t i;
-  if (a == NULL) return 0;
+  if (a == NULL) return GRPC_COMPRESS_NONE;
   for (i = 0; i < a->num_args; ++i) {
     if (a->args[i].type == GRPC_ARG_INTEGER &&
         !strcmp(GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM, a->args[i].key)) {
@@ -228,7 +228,7 @@ grpc_channel_args *grpc_channel_args_set_compression_algorithm(
   GPR_ASSERT(algorithm < GRPC_COMPRESS_ALGORITHMS_COUNT);
   grpc_arg tmp;
   tmp.type = GRPC_ARG_INTEGER;
-  tmp.key = GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM;
+  tmp.key = (char *)GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM;
   tmp.value.integer = algorithm;
   return grpc_channel_args_copy_and_add(a, &tmp, 1);
 }
@@ -263,7 +263,7 @@ grpc_channel_args *grpc_channel_args_compression_algorithm_set_state(
 
   if (grpc_channel_args_get_compression_algorithm(*a) == algorithm &&
       state == 0) {
-    char *algo_name = NULL;
+    const char *algo_name = NULL;
     GPR_ASSERT(grpc_compression_algorithm_name(algorithm, &algo_name) != 0);
     gpr_log(GPR_ERROR,
             "Tried to disable default compression algorithm '%s'. The "
@@ -279,7 +279,7 @@ grpc_channel_args *grpc_channel_args_compression_algorithm_set_state(
     /* create a new arg */
     grpc_arg tmp;
     tmp.type = GRPC_ARG_INTEGER;
-    tmp.key = GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET;
+    tmp.key = (char *)GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET;
     /* all enabled by default */
     tmp.value.integer = (1u << GRPC_COMPRESS_ALGORITHMS_COUNT) - 1;
     if (state != 0) {
diff --git a/src/core/lib/channel/channel_stack.h b/src/core/lib/channel/channel_stack.h
index ae1cac31f7..f0de80f0c0 100644
--- a/src/core/lib/channel/channel_stack.h
+++ b/src/core/lib/channel/channel_stack.h
@@ -281,7 +281,7 @@ grpc_channel_stack *grpc_channel_stack_from_top_element(
 /* Given the top element of a call stack, get the call stack itself */
 grpc_call_stack *grpc_call_stack_from_top_element(grpc_call_element *elem);
 
-void grpc_call_log_op(char *file, int line, gpr_log_severity severity,
+void grpc_call_log_op(const char *file, int line, gpr_log_severity severity,
                       grpc_call_element *elem,
                       grpc_transport_stream_op_batch *op);
 
diff --git a/src/core/lib/channel/channel_stack_builder.c b/src/core/lib/channel/channel_stack_builder.c
index df45f13c81..b663ebfb52 100644
--- a/src/core/lib/channel/channel_stack_builder.c
+++ b/src/core/lib/channel/channel_stack_builder.c
@@ -214,13 +214,13 @@ bool grpc_channel_stack_builder_prepend_filter(
 static void add_after(filter_node *before, const grpc_channel_filter *filter,
                       grpc_post_filter_create_init_func post_init_func,
                       void *user_data) {
-  filter_node *new = (filter_node *)gpr_malloc(sizeof(*new));
-  new->next = before->next;
-  new->prev = before;
-  new->next->prev = new->prev->next = new;
-  new->filter = filter;
-  new->init = post_init_func;
-  new->init_arg = user_data;
+  filter_node *new_node = (filter_node *)gpr_malloc(sizeof(*new_node));
+  new_node->next = before->next;
+  new_node->prev = before;
+  new_node->next->prev = new_node->prev->next = new_node;
+  new_node->filter = filter;
+  new_node->init = post_init_func;
+  new_node->init_arg = user_data;
 }
 
 bool grpc_channel_stack_builder_add_filter_before(
@@ -268,7 +268,7 @@ grpc_error *grpc_channel_stack_builder_finish(
 
   // create an array of filters
   const grpc_channel_filter **filters =
-      gpr_malloc(sizeof(*filters) * num_filters);
+      (const grpc_channel_filter **)gpr_malloc(sizeof(*filters) * num_filters);
   size_t i = 0;
   for (filter_node *p = builder->begin.next; p != &builder->end; p = p->next) {
     filters[i++] = p->filter;
diff --git a/src/core/lib/compression/compression.c b/src/core/lib/compression/compression.c
index e7414c4152..97a63654f3 100644
--- a/src/core/lib/compression/compression.c
+++ b/src/core/lib/compression/compression.c
@@ -59,7 +59,7 @@ int grpc_compression_algorithm_parse(grpc_slice name,
 }
 
 int grpc_compression_algorithm_name(grpc_compression_algorithm algorithm,
-                                    char **name) {
+                                    const char **name) {
   GRPC_API_TRACE("grpc_compression_algorithm_parse(algorithm=%d, name=%p)", 2,
                  ((int)algorithm, name));
   switch (algorithm) {
diff --git a/src/core/lib/compression/compression_internal.c b/src/core/lib/compression/compression_internal.c
index a395ceb572..8e0a14dead 100644
--- a/src/core/lib/compression/compression_internal.c
+++ b/src/core/lib/compression/compression_internal.c
@@ -183,7 +183,7 @@ int grpc_compression_algorithm_from_message_stream_compression_algorithm(
 /* Interfaces for message compression. */
 
 int grpc_message_compression_algorithm_name(
-    grpc_message_compression_algorithm algorithm, char **name) {
+    grpc_message_compression_algorithm algorithm, const char **name) {
   GRPC_API_TRACE("grpc_message_compression_algorithm_parse(algorithm=%d, name=%p)", 2,
                  ((int)algorithm, name));
   switch (algorithm) {
diff --git a/src/core/lib/compression/compression_internal.h b/src/core/lib/compression/compression_internal.h
index d3f95910a7..dcd49c8c11 100644
--- a/src/core/lib/compression/compression_internal.h
+++ b/src/core/lib/compression/compression_internal.h
@@ -91,7 +91,7 @@ int grpc_compression_algorithm_from_message_stream_compression_algorithm(
 /* Interfaces for message compression. */
 
 int grpc_message_compression_algorithm_name(
-    grpc_message_compression_algorithm algorithm, char **name);
+    grpc_message_compression_algorithm algorithm, const char **name);
 
 grpc_message_compression_algorithm grpc_message_compression_algorithm_for_level(
     grpc_message_compression_level level, uint32_t accepted_encodings);
diff --git a/src/core/lib/compression/stream_compression.c b/src/core/lib/compression/stream_compression.c
index df13d53e06..411489f029 100644
--- a/src/core/lib/compression/stream_compression.c
+++ b/src/core/lib/compression/stream_compression.c
@@ -16,176 +16,62 @@
  *
  */
 
-#include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 
 #include "src/core/lib/compression/stream_compression.h"
-#include "src/core/lib/iomgr/exec_ctx.h"
-#include "src/core/lib/slice/slice_internal.h"
+#include "src/core/lib/compression/stream_compression_gzip.h"
 
-#define OUTPUT_BLOCK_SIZE (1024)
-
-static bool gzip_flate(grpc_stream_compression_context *ctx,
-                       grpc_slice_buffer *in, grpc_slice_buffer *out,
-                       size_t *output_size, size_t max_output_size, int flush,
-                       bool *end_of_context) {
-  GPR_ASSERT(flush == 0 || flush == Z_SYNC_FLUSH || flush == Z_FINISH);
-  /* Full flush is not allowed when inflating. */
-  GPR_ASSERT(!(ctx->flate == inflate && (flush == Z_FINISH)));
-
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  int r;
-  bool eoc = false;
-  size_t original_max_output_size = max_output_size;
-  while (max_output_size > 0 && (in->length > 0 || flush) && !eoc) {
-    size_t slice_size = max_output_size < OUTPUT_BLOCK_SIZE ? max_output_size
-                                                            : OUTPUT_BLOCK_SIZE;
-    grpc_slice slice_out = GRPC_SLICE_MALLOC(slice_size);
-    ctx->zs.avail_out = (uInt)slice_size;
-    ctx->zs.next_out = GRPC_SLICE_START_PTR(slice_out);
-    while (ctx->zs.avail_out > 0 && in->length > 0 && !eoc) {
-      grpc_slice slice = grpc_slice_buffer_take_first(in);
-      ctx->zs.avail_in = (uInt)GRPC_SLICE_LENGTH(slice);
-      ctx->zs.next_in = GRPC_SLICE_START_PTR(slice);
-      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);
-        return false;
-      } else if (r == Z_STREAM_END && ctx->flate == inflate) {
-        eoc = true;
-      }
-      if (ctx->zs.avail_in > 0) {
-        grpc_slice_buffer_undo_take_first(
-            in,
-            grpc_slice_sub(slice, GRPC_SLICE_LENGTH(slice) - ctx->zs.avail_in,
-                           GRPC_SLICE_LENGTH(slice)));
-      }
-      grpc_slice_unref_internal(&exec_ctx, slice);
-    }
-    if (flush != 0 && ctx->zs.avail_out > 0 && !eoc) {
-      GPR_ASSERT(in->length == 0);
-      r = ctx->flate(&ctx->zs, flush);
-      if (flush == Z_SYNC_FLUSH) {
-        switch (r) {
-          case Z_OK:
-            /* Maybe flush is not complete; just made some partial progress. */
-            if (ctx->zs.avail_out > 0) {
-              flush = 0;
-            }
-            break;
-          case Z_BUF_ERROR:
-          case Z_STREAM_END:
-            flush = 0;
-            break;
-          default:
-            gpr_log(GPR_ERROR, "zlib error (%d)", r);
-            grpc_slice_unref_internal(&exec_ctx, slice_out);
-            grpc_exec_ctx_finish(&exec_ctx);
-            return false;
-        }
-      } else if (flush == Z_FINISH) {
-        switch (r) {
-          case Z_OK:
-          case Z_BUF_ERROR:
-            /* Wait for the next loop to assign additional output space. */
-            GPR_ASSERT(ctx->zs.avail_out == 0);
-            break;
-          case Z_STREAM_END:
-            flush = 0;
-            break;
-          default:
-            gpr_log(GPR_ERROR, "zlib error (%d)", r);
-            grpc_slice_unref_internal(&exec_ctx, slice_out);
-            grpc_exec_ctx_finish(&exec_ctx);
-            return false;
-        }
-      }
-    }
-
-    if (ctx->zs.avail_out == 0) {
-      grpc_slice_buffer_add(out, slice_out);
-    } else if (ctx->zs.avail_out < slice_size) {
-      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);
-    }
-    max_output_size -= (slice_size - ctx->zs.avail_out);
-  }
-  grpc_exec_ctx_finish(&exec_ctx);
-  if (end_of_context) {
-    *end_of_context = eoc;
-  }
-  if (output_size) {
-    *output_size = original_max_output_size - max_output_size;
-  }
-  return true;
-}
+extern const grpc_stream_compression_vtable
+    grpc_stream_compression_identity_vtable;
 
 bool grpc_stream_compress(grpc_stream_compression_context *ctx,
                           grpc_slice_buffer *in, grpc_slice_buffer *out,
                           size_t *output_size, size_t max_output_size,
                           grpc_stream_compression_flush flush) {
-  GPR_ASSERT(ctx->flate == deflate);
-  int gzip_flush;
-  switch (flush) {
-    case GRPC_STREAM_COMPRESSION_FLUSH_NONE:
-      gzip_flush = 0;
-      break;
-    case GRPC_STREAM_COMPRESSION_FLUSH_SYNC:
-      gzip_flush = Z_SYNC_FLUSH;
-      break;
-    case GRPC_STREAM_COMPRESSION_FLUSH_FINISH:
-      gzip_flush = Z_FINISH;
-      break;
-    default:
-      gzip_flush = 0;
-  }
-  return gzip_flate(ctx, in, out, output_size, max_output_size, gzip_flush,
-                    NULL);
+  return ctx->vtable->compress(ctx, in, out, output_size, max_output_size,
+                               flush);
 }
 
 bool grpc_stream_decompress(grpc_stream_compression_context *ctx,
                             grpc_slice_buffer *in, grpc_slice_buffer *out,
                             size_t *output_size, size_t max_output_size,
                             bool *end_of_context) {
-  GPR_ASSERT(ctx->flate == inflate);
-  return gzip_flate(ctx, in, out, output_size, max_output_size, Z_SYNC_FLUSH,
-                    end_of_context);
+  return ctx->vtable->decompress(ctx, in, out, output_size, max_output_size,
+                                 end_of_context);
 }
 
 grpc_stream_compression_context *grpc_stream_compression_context_create(
     grpc_stream_compression_method method) {
-  grpc_stream_compression_context *ctx =
-      gpr_zalloc(sizeof(grpc_stream_compression_context));
-  int r;
-  if (ctx == NULL) {
-    return NULL;
-  }
-  if (method == GRPC_STREAM_COMPRESSION_DECOMPRESS) {
-    r = inflateInit2(&ctx->zs, 0x1F);
-    ctx->flate = inflate;
-  } else {
-    r = deflateInit2(&ctx->zs, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 0x1F, 8,
-                     Z_DEFAULT_STRATEGY);
-    ctx->flate = deflate;
-  }
-  if (r != Z_OK) {
-    gpr_free(ctx);
-    return NULL;
+  switch (method) {
+    case GRPC_STREAM_COMPRESSION_IDENTITY_COMPRESS:
+    case GRPC_STREAM_COMPRESSION_IDENTITY_DECOMPRESS:
+      return grpc_stream_compression_identity_vtable.context_create(method);
+    case GRPC_STREAM_COMPRESSION_GZIP_COMPRESS:
+    case GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS:
+      return grpc_stream_compression_gzip_vtable.context_create(method);
+    default:
+      gpr_log(GPR_ERROR, "Unknown stream compression method: %d", method);
+      return NULL;
   }
-
-  return ctx;
 }
 
 void grpc_stream_compression_context_destroy(
     grpc_stream_compression_context *ctx) {
-  if (ctx->flate == inflate) {
-    inflateEnd(&ctx->zs);
+  ctx->vtable->context_destroy(ctx);
+}
+
+int grpc_stream_compression_method_parse(
+    grpc_slice value, bool is_compress,
+    grpc_stream_compression_method *method) {
+  if (grpc_slice_eq(value, GRPC_MDSTR_IDENTITY)) {
+    *method = is_compress ? GRPC_STREAM_COMPRESSION_IDENTITY_COMPRESS
+                          : GRPC_STREAM_COMPRESSION_IDENTITY_DECOMPRESS;
+    return 1;
+  } else if (grpc_slice_eq(value, GRPC_MDSTR_GZIP)) {
+    *method = is_compress ? GRPC_STREAM_COMPRESSION_GZIP_COMPRESS
+                          : GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS;
+    return 1;
   } else {
-    deflateEnd(&ctx->zs);
+    return 0;
   }
-  gpr_free(ctx);
 }
diff --git a/src/core/lib/compression/stream_compression.h b/src/core/lib/compression/stream_compression.h
index 844dff81a3..6d073280fa 100644
--- a/src/core/lib/compression/stream_compression.h
+++ b/src/core/lib/compression/stream_compression.h
@@ -24,15 +24,20 @@
 #include <grpc/slice_buffer.h>
 #include <zlib.h>
 
+#include "src/core/lib/transport/static_metadata.h"
+
+typedef struct grpc_stream_compression_vtable grpc_stream_compression_vtable;
+
 /* Stream compression/decompression context */
 typedef struct grpc_stream_compression_context {
-  z_stream zs;
-  int (*flate)(z_stream *zs, int flush);
+  const grpc_stream_compression_vtable *vtable;
 } grpc_stream_compression_context;
 
 typedef enum grpc_stream_compression_method {
-  GRPC_STREAM_COMPRESSION_COMPRESS = 0,
-  GRPC_STREAM_COMPRESSION_DECOMPRESS,
+  GRPC_STREAM_COMPRESSION_IDENTITY_COMPRESS = 0,
+  GRPC_STREAM_COMPRESSION_IDENTITY_DECOMPRESS,
+  GRPC_STREAM_COMPRESSION_GZIP_COMPRESS,
+  GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS,
   GRPC_STREAM_COMPRESSION_METHOD_COUNT
 } grpc_stream_compression_method;
 
@@ -43,6 +48,19 @@ typedef enum grpc_stream_compression_flush {
   GRPC_STREAM_COMPRESSION_FLUSH_COUNT
 } grpc_stream_compression_flush;
 
+struct grpc_stream_compression_vtable {
+  bool (*compress)(grpc_stream_compression_context *ctx, grpc_slice_buffer *in,
+                   grpc_slice_buffer *out, size_t *output_size,
+                   size_t max_output_size, grpc_stream_compression_flush flush);
+  bool (*decompress)(grpc_stream_compression_context *ctx,
+                     grpc_slice_buffer *in, grpc_slice_buffer *out,
+                     size_t *output_size, size_t max_output_size,
+                     bool *end_of_context);
+  grpc_stream_compression_context *(*context_create)(
+      grpc_stream_compression_method method);
+  void (*context_destroy)(grpc_stream_compression_context *ctx);
+};
+
 /**
  * Compress bytes provided in \a in with a given context, with an optional flush
  * at the end of compression. Emits at most \a max_output_size compressed bytes
@@ -87,4 +105,10 @@ grpc_stream_compression_context *grpc_stream_compression_context_create(
 void grpc_stream_compression_context_destroy(
     grpc_stream_compression_context *ctx);
 
+/**
+ * Parse stream compression method based on algorithm name
+ */
+int grpc_stream_compression_method_parse(
+    grpc_slice value, bool is_compress, grpc_stream_compression_method *method);
+
 #endif
diff --git a/src/core/lib/compression/stream_compression_gzip.c b/src/core/lib/compression/stream_compression_gzip.c
new file mode 100644
index 0000000000..abcbdb3a91
--- /dev/null
+++ b/src/core/lib/compression/stream_compression_gzip.c
@@ -0,0 +1,228 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+#include "src/core/lib/compression/stream_compression_gzip.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/slice/slice_internal.h"
+
+#define OUTPUT_BLOCK_SIZE (1024)
+
+typedef struct grpc_stream_compression_context_gzip {
+  grpc_stream_compression_context base;
+
+  z_stream zs;
+  int (*flate)(z_stream *zs, int flush);
+} grpc_stream_compression_context_gzip;
+
+static bool gzip_flate(grpc_stream_compression_context_gzip *ctx,
+                       grpc_slice_buffer *in, grpc_slice_buffer *out,
+                       size_t *output_size, size_t max_output_size, int flush,
+                       bool *end_of_context) {
+  GPR_ASSERT(flush == 0 || flush == Z_SYNC_FLUSH || flush == Z_FINISH);
+  /* Full flush is not allowed when inflating. */
+  GPR_ASSERT(!(ctx->flate == inflate && (flush == Z_FINISH)));
+
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  int r;
+  bool eoc = false;
+  size_t original_max_output_size = max_output_size;
+  while (max_output_size > 0 && (in->length > 0 || flush) && !eoc) {
+    size_t slice_size = max_output_size < OUTPUT_BLOCK_SIZE ? max_output_size
+                                                            : OUTPUT_BLOCK_SIZE;
+    grpc_slice slice_out = GRPC_SLICE_MALLOC(slice_size);
+    ctx->zs.avail_out = (uInt)slice_size;
+    ctx->zs.next_out = GRPC_SLICE_START_PTR(slice_out);
+    while (ctx->zs.avail_out > 0 && in->length > 0 && !eoc) {
+      grpc_slice slice = grpc_slice_buffer_take_first(in);
+      ctx->zs.avail_in = (uInt)GRPC_SLICE_LENGTH(slice);
+      ctx->zs.next_in = GRPC_SLICE_START_PTR(slice);
+      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);
+        return false;
+      } else if (r == Z_STREAM_END && ctx->flate == inflate) {
+        eoc = true;
+      }
+      if (ctx->zs.avail_in > 0) {
+        grpc_slice_buffer_undo_take_first(
+            in,
+            grpc_slice_sub(slice, GRPC_SLICE_LENGTH(slice) - ctx->zs.avail_in,
+                           GRPC_SLICE_LENGTH(slice)));
+      }
+      grpc_slice_unref_internal(&exec_ctx, slice);
+    }
+    if (flush != 0 && ctx->zs.avail_out > 0 && !eoc) {
+      GPR_ASSERT(in->length == 0);
+      r = ctx->flate(&ctx->zs, flush);
+      if (flush == Z_SYNC_FLUSH) {
+        switch (r) {
+          case Z_OK:
+            /* Maybe flush is not complete; just made some partial progress. */
+            if (ctx->zs.avail_out > 0) {
+              flush = 0;
+            }
+            break;
+          case Z_BUF_ERROR:
+          case Z_STREAM_END:
+            flush = 0;
+            break;
+          default:
+            gpr_log(GPR_ERROR, "zlib error (%d)", r);
+            grpc_slice_unref_internal(&exec_ctx, slice_out);
+            grpc_exec_ctx_finish(&exec_ctx);
+            return false;
+        }
+      } else if (flush == Z_FINISH) {
+        switch (r) {
+          case Z_OK:
+          case Z_BUF_ERROR:
+            /* Wait for the next loop to assign additional output space. */
+            GPR_ASSERT(ctx->zs.avail_out == 0);
+            break;
+          case Z_STREAM_END:
+            flush = 0;
+            break;
+          default:
+            gpr_log(GPR_ERROR, "zlib error (%d)", r);
+            grpc_slice_unref_internal(&exec_ctx, slice_out);
+            grpc_exec_ctx_finish(&exec_ctx);
+            return false;
+        }
+      }
+    }
+
+    if (ctx->zs.avail_out == 0) {
+      grpc_slice_buffer_add(out, slice_out);
+    } else if (ctx->zs.avail_out < slice_size) {
+      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);
+    }
+    max_output_size -= (slice_size - ctx->zs.avail_out);
+  }
+  grpc_exec_ctx_finish(&exec_ctx);
+  if (end_of_context) {
+    *end_of_context = eoc;
+  }
+  if (output_size) {
+    *output_size = original_max_output_size - max_output_size;
+  }
+  return true;
+}
+
+static bool grpc_stream_compress_gzip(grpc_stream_compression_context *ctx,
+                                      grpc_slice_buffer *in,
+                                      grpc_slice_buffer *out,
+                                      size_t *output_size,
+                                      size_t max_output_size,
+                                      grpc_stream_compression_flush flush) {
+  if (ctx == NULL) {
+    return false;
+  }
+  grpc_stream_compression_context_gzip *gzip_ctx =
+      (grpc_stream_compression_context_gzip *)ctx;
+  GPR_ASSERT(gzip_ctx->flate == deflate);
+  int gzip_flush;
+  switch (flush) {
+    case GRPC_STREAM_COMPRESSION_FLUSH_NONE:
+      gzip_flush = 0;
+      break;
+    case GRPC_STREAM_COMPRESSION_FLUSH_SYNC:
+      gzip_flush = Z_SYNC_FLUSH;
+      break;
+    case GRPC_STREAM_COMPRESSION_FLUSH_FINISH:
+      gzip_flush = Z_FINISH;
+      break;
+    default:
+      gzip_flush = 0;
+  }
+  return gzip_flate(gzip_ctx, in, out, output_size, max_output_size, gzip_flush,
+                    NULL);
+}
+
+static bool grpc_stream_decompress_gzip(grpc_stream_compression_context *ctx,
+                                        grpc_slice_buffer *in,
+                                        grpc_slice_buffer *out,
+                                        size_t *output_size,
+                                        size_t max_output_size,
+                                        bool *end_of_context) {
+  if (ctx == NULL) {
+    return false;
+  }
+  grpc_stream_compression_context_gzip *gzip_ctx =
+      (grpc_stream_compression_context_gzip *)ctx;
+  GPR_ASSERT(gzip_ctx->flate == inflate);
+  return gzip_flate(gzip_ctx, in, out, output_size, max_output_size,
+                    Z_SYNC_FLUSH, end_of_context);
+}
+
+static grpc_stream_compression_context *
+grpc_stream_compression_context_create_gzip(
+    grpc_stream_compression_method method) {
+  GPR_ASSERT(method == GRPC_STREAM_COMPRESSION_GZIP_COMPRESS ||
+             method == GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS);
+  grpc_stream_compression_context_gzip *gzip_ctx =
+      (grpc_stream_compression_context_gzip *)gpr_zalloc(
+          sizeof(grpc_stream_compression_context_gzip));
+  int r;
+  if (gzip_ctx == NULL) {
+    return NULL;
+  }
+  if (method == GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS) {
+    r = inflateInit2(&gzip_ctx->zs, 0x1F);
+    gzip_ctx->flate = inflate;
+  } else {
+    r = deflateInit2(&gzip_ctx->zs, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 0x1F, 8,
+                     Z_DEFAULT_STRATEGY);
+    gzip_ctx->flate = deflate;
+  }
+  if (r != Z_OK) {
+    gpr_free(gzip_ctx);
+    return NULL;
+  }
+
+  gzip_ctx->base.vtable = &grpc_stream_compression_gzip_vtable;
+  return (grpc_stream_compression_context *)gzip_ctx;
+}
+
+static void grpc_stream_compression_context_destroy_gzip(
+    grpc_stream_compression_context *ctx) {
+  if (ctx == NULL) {
+    return;
+  }
+  grpc_stream_compression_context_gzip *gzip_ctx =
+      (grpc_stream_compression_context_gzip *)ctx;
+  if (gzip_ctx->flate == inflate) {
+    inflateEnd(&gzip_ctx->zs);
+  } else {
+    deflateEnd(&gzip_ctx->zs);
+  }
+  gpr_free(ctx);
+}
+
+const grpc_stream_compression_vtable grpc_stream_compression_gzip_vtable = {
+    .compress = grpc_stream_compress_gzip,
+    .decompress = grpc_stream_decompress_gzip,
+    .context_create = grpc_stream_compression_context_create_gzip,
+    .context_destroy = grpc_stream_compression_context_destroy_gzip};
diff --git a/src/core/lib/compression/stream_compression_gzip.h b/src/core/lib/compression/stream_compression_gzip.h
new file mode 100644
index 0000000000..7cf49a0de9
--- /dev/null
+++ b/src/core/lib/compression/stream_compression_gzip.h
@@ -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.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_COMPRESSION_STREAM_COMPRESSION_GZIP_H
+#define GRPC_CORE_LIB_COMPRESSION_STREAM_COMPRESSION_GZIP_H
+
+#include "src/core/lib/compression/stream_compression.h"
+
+extern const grpc_stream_compression_vtable grpc_stream_compression_gzip_vtable;
+
+#endif
diff --git a/src/core/lib/compression/stream_compression_identity.c b/src/core/lib/compression/stream_compression_identity.c
new file mode 100644
index 0000000000..3dfcf53b85
--- /dev/null
+++ b/src/core/lib/compression/stream_compression_identity.c
@@ -0,0 +1,94 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+#include "src/core/lib/compression/stream_compression_identity.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/slice/slice_internal.h"
+
+#define OUTPUT_BLOCK_SIZE (1024)
+
+/* Singleton context used for all identity streams. */
+static grpc_stream_compression_context identity_ctx = {
+    .vtable = &grpc_stream_compression_identity_vtable};
+
+static void grpc_stream_compression_pass_through(grpc_slice_buffer *in,
+                                                 grpc_slice_buffer *out,
+                                                 size_t *output_size,
+                                                 size_t max_output_size) {
+  if (max_output_size >= in->length) {
+    if (output_size) {
+      *output_size = in->length;
+    }
+    grpc_slice_buffer_move_into(in, out);
+  } else {
+    if (output_size) {
+      *output_size = max_output_size;
+    }
+    grpc_slice_buffer_move_first(in, max_output_size, out);
+  }
+}
+
+static bool grpc_stream_compress_identity(grpc_stream_compression_context *ctx,
+                                          grpc_slice_buffer *in,
+                                          grpc_slice_buffer *out,
+                                          size_t *output_size,
+                                          size_t max_output_size,
+                                          grpc_stream_compression_flush flush) {
+  if (ctx == NULL) {
+    return false;
+  }
+  grpc_stream_compression_pass_through(in, out, output_size, max_output_size);
+  return true;
+}
+
+static bool grpc_stream_decompress_identity(
+    grpc_stream_compression_context *ctx, grpc_slice_buffer *in,
+    grpc_slice_buffer *out, size_t *output_size, size_t max_output_size,
+    bool *end_of_context) {
+  if (ctx == NULL) {
+    return false;
+  }
+  grpc_stream_compression_pass_through(in, out, output_size, max_output_size);
+  if (end_of_context) {
+    *end_of_context = false;
+  }
+  return true;
+}
+
+static grpc_stream_compression_context *
+grpc_stream_compression_context_create_identity(
+    grpc_stream_compression_method method) {
+  GPR_ASSERT(method == GRPC_STREAM_COMPRESSION_IDENTITY_COMPRESS ||
+             method == GRPC_STREAM_COMPRESSION_IDENTITY_DECOMPRESS);
+  /* No context needed in this case. Use fake context instead. */
+  return (grpc_stream_compression_context *)&identity_ctx;
+}
+
+static void grpc_stream_compression_context_destroy_identity(
+    grpc_stream_compression_context *ctx) {
+  return;
+}
+
+const grpc_stream_compression_vtable grpc_stream_compression_identity_vtable = {
+    .compress = grpc_stream_compress_identity,
+    .decompress = grpc_stream_decompress_identity,
+    .context_create = grpc_stream_compression_context_create_identity,
+    .context_destroy = grpc_stream_compression_context_destroy_identity};
diff --git a/src/core/lib/compression/stream_compression_identity.h b/src/core/lib/compression/stream_compression_identity.h
new file mode 100644
index 0000000000..41926e949e
--- /dev/null
+++ b/src/core/lib/compression/stream_compression_identity.h
@@ -0,0 +1,27 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_COMPRESSION_STREAM_COMPRESSION_IDENTITY_H
+#define GRPC_CORE_LIB_COMPRESSION_STREAM_COMPRESSION_IDENTITY_H
+
+#include "src/core/lib/compression/stream_compression.h"
+
+extern const grpc_stream_compression_vtable
+    grpc_stream_compression_identity_vtable;
+
+#endif
diff --git a/src/core/lib/debug/stats_data.c b/src/core/lib/debug/stats_data.c
index 3fd8ee38ef..fb6055f795 100644
--- a/src/core/lib/debug/stats_data.c
+++ b/src/core/lib/debug/stats_data.c
@@ -25,8 +25,18 @@
 const char *grpc_stats_counter_name[GRPC_STATS_COUNTER_COUNT] = {
     "client_calls_created",
     "server_calls_created",
+    "cqs_created",
+    "client_channels_created",
+    "client_subchannels_created",
+    "server_channels_created",
     "syscall_poll",
     "syscall_wait",
+    "pollset_kick",
+    "pollset_kicked_without_poller",
+    "pollset_kicked_again",
+    "pollset_kick_wakeup_fd",
+    "pollset_kick_wakeup_cv",
+    "pollset_kick_own_thread",
     "histogram_slow_lookups",
     "syscall_write",
     "syscall_read",
@@ -46,6 +56,49 @@ const char *grpc_stats_counter_name[GRPC_STATS_COUNTER_COUNT] = {
     "http2_writes_offloaded",
     "http2_writes_continued",
     "http2_partial_writes",
+    "http2_initiate_write_due_to_initial_write",
+    "http2_initiate_write_due_to_start_new_stream",
+    "http2_initiate_write_due_to_send_message",
+    "http2_initiate_write_due_to_send_initial_metadata",
+    "http2_initiate_write_due_to_send_trailing_metadata",
+    "http2_initiate_write_due_to_retry_send_ping",
+    "http2_initiate_write_due_to_continue_pings",
+    "http2_initiate_write_due_to_goaway_sent",
+    "http2_initiate_write_due_to_rst_stream",
+    "http2_initiate_write_due_to_close_from_api",
+    "http2_initiate_write_due_to_stream_flow_control",
+    "http2_initiate_write_due_to_transport_flow_control",
+    "http2_initiate_write_due_to_send_settings",
+    "http2_initiate_write_due_to_bdp_estimator_ping",
+    "http2_initiate_write_due_to_flow_control_unstalled_by_setting",
+    "http2_initiate_write_due_to_flow_control_unstalled_by_update",
+    "http2_initiate_write_due_to_application_ping",
+    "http2_initiate_write_due_to_keepalive_ping",
+    "http2_initiate_write_due_to_transport_flow_control_unstalled",
+    "http2_initiate_write_due_to_ping_response",
+    "http2_initiate_write_due_to_force_rst_stream",
+    "hpack_recv_indexed",
+    "hpack_recv_lithdr_incidx",
+    "hpack_recv_lithdr_incidx_v",
+    "hpack_recv_lithdr_notidx",
+    "hpack_recv_lithdr_notidx_v",
+    "hpack_recv_lithdr_nvridx",
+    "hpack_recv_lithdr_nvridx_v",
+    "hpack_recv_uncompressed",
+    "hpack_recv_huffman",
+    "hpack_recv_binary",
+    "hpack_recv_binary_base64",
+    "hpack_send_indexed",
+    "hpack_send_lithdr_incidx",
+    "hpack_send_lithdr_incidx_v",
+    "hpack_send_lithdr_notidx",
+    "hpack_send_lithdr_notidx_v",
+    "hpack_send_lithdr_nvridx",
+    "hpack_send_lithdr_nvridx_v",
+    "hpack_send_uncompressed",
+    "hpack_send_huffman",
+    "hpack_send_binary",
+    "hpack_send_binary_base64",
     "combiner_locks_initiated",
     "combiner_locks_scheduled_items",
     "combiner_locks_scheduled_final_items",
@@ -56,12 +109,30 @@ const char *grpc_stats_counter_name[GRPC_STATS_COUNTER_COUNT] = {
     "executor_wakeup_initiated",
     "executor_queue_drained",
     "executor_push_retries",
+    "executor_threads_created",
+    "executor_threads_used",
+    "server_requested_calls",
+    "server_slowpath_requests_queued",
 };
 const char *grpc_stats_counter_doc[GRPC_STATS_COUNTER_COUNT] = {
     "Number of client side calls created by this process",
     "Number of server side calls created by this process",
+    "Number of completion queues created", "Number of client channels created",
+    "Number of client subchannels created", "Number of server channels created",
     "Number of polling syscalls (epoll_wait, poll, etc) made by this process",
     "Number of sleeping syscalls made by this process",
+    "How many polling wakeups were performed by the process (only valid for "
+    "epoll1 right now)",
+    "How many times was a polling wakeup requested without an active poller "
+    "(only valid for epoll1 right now)",
+    "How many times was the same polling worker awoken repeatedly before "
+    "waking up (only valid for epoll1 right now)",
+    "How many times was an eventfd used as the wakeup vector for a polling "
+    "wakeup (only valid for epoll1 right now)",
+    "How many times was a condition variable used as the wakeup vector for a "
+    "polling wakeup (only valid for epoll1 right now)",
+    "How many times could a polling wakeup be satisfied by keeping the waking "
+    "thread awake? (only valid for epoll1 right now)",
     "Number of times histogram increments went through the slow (binary "
     "search) path",
     "Number of write syscalls (or equivalent - eg sendmsg) made by this "
@@ -84,6 +155,56 @@ const char *grpc_stats_counter_doc[GRPC_STATS_COUNTER_COUNT] = {
     "written",
     "Number of HTTP2 writes that were made knowing there was still more data "
     "to be written (we cap maximum write size to syscall_write)",
+    "Number of HTTP2 writes initiated due to 'initial_write'",
+    "Number of HTTP2 writes initiated due to 'start_new_stream'",
+    "Number of HTTP2 writes initiated due to 'send_message'",
+    "Number of HTTP2 writes initiated due to 'send_initial_metadata'",
+    "Number of HTTP2 writes initiated due to 'send_trailing_metadata'",
+    "Number of HTTP2 writes initiated due to 'retry_send_ping'",
+    "Number of HTTP2 writes initiated due to 'continue_pings'",
+    "Number of HTTP2 writes initiated due to 'goaway_sent'",
+    "Number of HTTP2 writes initiated due to 'rst_stream'",
+    "Number of HTTP2 writes initiated due to 'close_from_api'",
+    "Number of HTTP2 writes initiated due to 'stream_flow_control'",
+    "Number of HTTP2 writes initiated due to 'transport_flow_control'",
+    "Number of HTTP2 writes initiated due to 'send_settings'",
+    "Number of HTTP2 writes initiated due to 'bdp_estimator_ping'",
+    "Number of HTTP2 writes initiated due to "
+    "'flow_control_unstalled_by_setting'",
+    "Number of HTTP2 writes initiated due to "
+    "'flow_control_unstalled_by_update'",
+    "Number of HTTP2 writes initiated due to 'application_ping'",
+    "Number of HTTP2 writes initiated due to 'keepalive_ping'",
+    "Number of HTTP2 writes initiated due to "
+    "'transport_flow_control_unstalled'",
+    "Number of HTTP2 writes initiated due to 'ping_response'",
+    "Number of HTTP2 writes initiated due to 'force_rst_stream'",
+    "Number of HPACK indexed fields received",
+    "Number of HPACK literal headers received with incremental indexing",
+    "Number of HPACK literal headers received with incremental indexing and "
+    "literal keys",
+    "Number of HPACK literal headers received with no indexing",
+    "Number of HPACK literal headers received with no indexing and literal "
+    "keys",
+    "Number of HPACK literal headers received with never-indexing",
+    "Number of HPACK literal headers received with never-indexing and literal "
+    "keys",
+    "Number of uncompressed strings received in metadata",
+    "Number of huffman encoded strings received in metadata",
+    "Number of binary strings received in metadata",
+    "Number of binary strings received encoded in base64 in metadata",
+    "Number of HPACK indexed fields sent",
+    "Number of HPACK literal headers sent with incremental indexing",
+    "Number of HPACK literal headers sent with incremental indexing and "
+    "literal keys",
+    "Number of HPACK literal headers sent with no indexing",
+    "Number of HPACK literal headers sent with no indexing and literal keys",
+    "Number of HPACK literal headers sent with never-indexing",
+    "Number of HPACK literal headers sent with never-indexing and literal keys",
+    "Number of uncompressed strings sent in metadata",
+    "Number of huffman encoded strings sent in metadata",
+    "Number of binary strings received in metadata",
+    "Number of binary strings received encoded in base64 in metadata",
     "Number of combiner lock entries by process (first items queued to a "
     "combiner)",
     "Number of items scheduled against combiner locks",
@@ -98,8 +219,15 @@ const char *grpc_stats_counter_doc[GRPC_STATS_COUNTER_COUNT] = {
     "Number of times an executor queue was drained",
     "Number of times we raced and were forced to retry pushing a closure to "
     "the executor",
+    "Size of the backing thread pool for overflow gRPC Core work",
+    "How many executor threads actually got used",
+    "How many calls were requested (not necessarily received) by the server",
+    "How many times was the server slow path taken (indicates too few "
+    "outstanding requests)",
 };
 const char *grpc_stats_histogram_name[GRPC_STATS_HISTOGRAM_COUNT] = {
+    "call_initial_size",
+    "poll_events_returned",
     "tcp_write_size",
     "tcp_write_iov_size",
     "tcp_read_size",
@@ -110,8 +238,12 @@ const char *grpc_stats_histogram_name[GRPC_STATS_HISTOGRAM_COUNT] = {
     "http2_send_message_per_write",
     "http2_send_trailing_metadata_per_write",
     "http2_send_flowctl_per_write",
+    "executor_closures_per_wakeup",
+    "server_cqs_checked",
 };
 const char *grpc_stats_histogram_doc[GRPC_STATS_HISTOGRAM_COUNT] = {
+    "Initial size of the grpc_call arena created at call start",
+    "How many events are called for each syscall_poll",
     "Number of bytes offered to each syscall_write",
     "Number of byte segments offered to each syscall_write",
     "Number of bytes received by each syscall_read",
@@ -122,8 +254,47 @@ const char *grpc_stats_histogram_doc[GRPC_STATS_HISTOGRAM_COUNT] = {
     "Number of streams whose payload was written per TCP write",
     "Number of streams terminated per TCP write",
     "Number of flow control updates written per TCP write",
+    "Number of closures executed each time an executor wakes up",
+    "How many completion queues were checked looking for a CQ that had "
+    "requested the incoming call",
 };
 const int grpc_stats_table_0[65] = {
+    0,      1,      2,      3,      4,     5,     7,     9,     11,    14,
+    17,     21,     26,     32,     39,    47,    57,    68,    82,    98,
+    117,    140,    167,    199,    238,   284,   339,   404,   482,   575,
+    685,    816,    972,    1158,   1380,  1644,  1959,  2334,  2780,  3312,
+    3945,   4699,   5597,   6667,   7941,  9459,  11267, 13420, 15984, 19038,
+    22676,  27009,  32169,  38315,  45635, 54353, 64737, 77104, 91834, 109378,
+    130273, 155159, 184799, 220100, 262144};
+const uint8_t grpc_stats_table_1[124] = {
+    0,  0,  0,  1,  1,  1,  2,  2,  3,  3,  3,  4,  4,  5,  5,  6,  6,  6,
+    7,  7,  7,  8,  9,  9,  10, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15,
+    15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 22, 23, 24,
+    24, 25, 25, 26, 26, 26, 27, 27, 28, 29, 29, 30, 30, 30, 31, 31, 32, 33,
+    33, 34, 34, 34, 35, 35, 36, 37, 37, 37, 38, 38, 39, 39, 40, 40, 41, 41,
+    42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 48, 48, 49, 49, 50, 50,
+    51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 56, 56, 57, 57, 58, 58};
+const int grpc_stats_table_2[129] = {
+    0,   1,   2,   3,   4,   5,   6,   7,   8,   9,   10,  11,  12,  13,  14,
+    15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  30,
+    32,  34,  36,  38,  40,  42,  44,  46,  48,  50,  52,  54,  56,  58,  60,
+    63,  66,  69,  72,  75,  78,  81,  84,  87,  90,  94,  98,  102, 106, 110,
+    114, 118, 122, 126, 131, 136, 141, 146, 151, 156, 162, 168, 174, 180, 186,
+    192, 199, 206, 213, 220, 228, 236, 244, 252, 260, 269, 278, 287, 297, 307,
+    317, 327, 338, 349, 360, 372, 384, 396, 409, 422, 436, 450, 464, 479, 494,
+    510, 526, 543, 560, 578, 596, 615, 634, 654, 674, 695, 717, 739, 762, 785,
+    809, 834, 859, 885, 912, 939, 967, 996, 1024};
+const uint8_t grpc_stats_table_3[166] = {
+    0,  0,  0,  1,  1,  1,  1,  2,  2,  3,  3,  4,  4,  5,  5,  6,  6,  7,  7,
+    8,  8,  9,  9,  10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 16,
+    17, 17, 18, 19, 19, 20, 21, 21, 22, 23, 23, 24, 25, 25, 26, 26, 27, 27, 28,
+    28, 29, 29, 30, 30, 31, 31, 32, 32, 33, 33, 34, 34, 35, 36, 36, 37, 38, 39,
+    40, 40, 41, 42, 42, 43, 44, 44, 45, 46, 46, 47, 48, 48, 49, 49, 50, 50, 51,
+    51, 52, 52, 53, 53, 54, 54, 55, 56, 57, 58, 59, 59, 60, 61, 62, 63, 63, 64,
+    65, 65, 66, 67, 67, 68, 69, 69, 70, 71, 71, 72, 72, 73, 73, 74, 75, 75, 76,
+    76, 77, 78, 79, 79, 80, 81, 82, 83, 84, 85, 85, 86, 87, 88, 88, 89, 90, 90,
+    91, 92, 92, 93, 94, 94, 95, 95, 96, 97, 97, 98, 98, 99};
+const int grpc_stats_table_4[65] = {
     0,       1,       2,       3,       4,       6,       8,        11,
     15,      20,      26,      34,      44,      57,      73,       94,
     121,     155,     199,     255,     327,     419,     537,      688,
@@ -133,26 +304,82 @@ const int grpc_stats_table_0[65] = {
     326126,  417200,  533707,  682750,  873414,  1117323, 1429345,  1828502,
     2339127, 2992348, 3827987, 4896985, 6264509, 8013925, 10251880, 13114801,
     16777216};
-const uint8_t grpc_stats_table_1[87] = {
+const uint8_t grpc_stats_table_5[87] = {
     0,  0,  1,  1,  2,  3,  3,  4,  4,  5,  6,  6,  7,  8,  8,  9,  10, 11,
     11, 12, 13, 13, 14, 15, 15, 16, 17, 17, 18, 19, 20, 20, 21, 22, 22, 23,
     24, 25, 25, 26, 27, 27, 28, 29, 29, 30, 31, 31, 32, 33, 34, 34, 35, 36,
     36, 37, 38, 39, 39, 40, 41, 41, 42, 43, 44, 44, 45, 45, 46, 47, 48, 48,
     49, 50, 51, 51, 52, 53, 53, 54, 55, 56, 56, 57, 58, 58, 59};
-const int grpc_stats_table_2[65] = {
+const int grpc_stats_table_6[65] = {
     0,   1,   2,   3,   4,   5,   6,   7,   8,   9,   10,  11,  12,
     14,  16,  18,  20,  22,  24,  27,  30,  33,  36,  39,  43,  47,
     51,  56,  61,  66,  72,  78,  85,  92,  100, 109, 118, 128, 139,
     151, 164, 178, 193, 209, 226, 244, 264, 285, 308, 333, 359, 387,
     418, 451, 486, 524, 565, 609, 656, 707, 762, 821, 884, 952, 1024};
-const uint8_t grpc_stats_table_3[102] = {
+const uint8_t grpc_stats_table_7[102] = {
     0,  0,  0,  1,  1,  1,  1,  2,  2,  3,  3,  4,  4,  5,  5,  6,  6,
     6,  7,  7,  7,  8,  8,  9,  9,  10, 11, 11, 12, 12, 13, 13, 14, 14,
     14, 15, 15, 16, 16, 17, 17, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23,
     23, 24, 24, 24, 25, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 32,
     32, 33, 33, 34, 35, 35, 36, 37, 37, 38, 38, 39, 39, 40, 40, 41, 41,
     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) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
+  value = GPR_CLAMP(value, 0, 262144);
+  if (value < 6) {
+    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE,
+                             value);
+    return;
+  }
+  union {
+    double dbl;
+    uint64_t uint;
+  } _val, _bkt;
+  _val.dbl = value;
+  if (_val.uint < 4651092515166879744ull) {
+    int bucket =
+        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);
+    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));
+}
+void grpc_stats_inc_poll_events_returned(grpc_exec_ctx *exec_ctx, int value) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
+  value = GPR_CLAMP(value, 0, 1024);
+  if (value < 29) {
+    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
+                             GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED, value);
+    return;
+  }
+  union {
+    double dbl;
+    uint64_t uint;
+  } _val, _bkt;
+  _val.dbl = value;
+  if (_val.uint < 4642789003353915392ull) {
+    int bucket =
+        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);
+    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));
+}
 void grpc_stats_inc_tcp_write_size(grpc_exec_ctx *exec_ctx, int value) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
   value = GPR_CLAMP(value, 0, 16777216);
   if (value < 5) {
     GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE,
@@ -166,8 +393,8 @@ void grpc_stats_inc_tcp_write_size(grpc_exec_ctx *exec_ctx, int value) {
   _val.dbl = value;
   if (_val.uint < 4683743612465315840ull) {
     int bucket =
-        grpc_stats_table_1[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
-    _bkt.dbl = grpc_stats_table_0[bucket];
+        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);
@@ -175,9 +402,10 @@ void grpc_stats_inc_tcp_write_size(grpc_exec_ctx *exec_ctx, int value) {
   }
   GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE,
                            grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_0, 64));
+                               (exec_ctx), value, grpc_stats_table_4, 64));
 }
 void grpc_stats_inc_tcp_write_iov_size(grpc_exec_ctx *exec_ctx, int value) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 13) {
     GRPC_STATS_INC_HISTOGRAM((exec_ctx),
@@ -191,8 +419,8 @@ void grpc_stats_inc_tcp_write_iov_size(grpc_exec_ctx *exec_ctx, int value) {
   _val.dbl = value;
   if (_val.uint < 4637863191261478912ull) {
     int bucket =
-        grpc_stats_table_3[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
-    _bkt.dbl = grpc_stats_table_2[bucket];
+        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);
@@ -200,9 +428,10 @@ void grpc_stats_inc_tcp_write_iov_size(grpc_exec_ctx *exec_ctx, int value) {
   }
   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_2, 64));
+                               (exec_ctx), value, grpc_stats_table_6, 64));
 }
 void grpc_stats_inc_tcp_read_size(grpc_exec_ctx *exec_ctx, int value) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
   value = GPR_CLAMP(value, 0, 16777216);
   if (value < 5) {
     GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_SIZE,
@@ -216,8 +445,8 @@ void grpc_stats_inc_tcp_read_size(grpc_exec_ctx *exec_ctx, int value) {
   _val.dbl = value;
   if (_val.uint < 4683743612465315840ull) {
     int bucket =
-        grpc_stats_table_1[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
-    _bkt.dbl = grpc_stats_table_0[bucket];
+        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);
@@ -225,9 +454,10 @@ void grpc_stats_inc_tcp_read_size(grpc_exec_ctx *exec_ctx, int value) {
   }
   GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_SIZE,
                            grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_0, 64));
+                               (exec_ctx), value, grpc_stats_table_4, 64));
 }
 void grpc_stats_inc_tcp_read_offer(grpc_exec_ctx *exec_ctx, int value) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
   value = GPR_CLAMP(value, 0, 16777216);
   if (value < 5) {
     GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_OFFER,
@@ -241,8 +471,8 @@ void grpc_stats_inc_tcp_read_offer(grpc_exec_ctx *exec_ctx, int value) {
   _val.dbl = value;
   if (_val.uint < 4683743612465315840ull) {
     int bucket =
-        grpc_stats_table_1[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
-    _bkt.dbl = grpc_stats_table_0[bucket];
+        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);
@@ -250,10 +480,11 @@ void grpc_stats_inc_tcp_read_offer(grpc_exec_ctx *exec_ctx, int value) {
   }
   GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_OFFER,
                            grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_0, 64));
+                               (exec_ctx), value, grpc_stats_table_4, 64));
 }
 void grpc_stats_inc_tcp_read_offer_iov_size(grpc_exec_ctx *exec_ctx,
                                             int value) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 13) {
     GRPC_STATS_INC_HISTOGRAM(
@@ -267,8 +498,8 @@ void grpc_stats_inc_tcp_read_offer_iov_size(grpc_exec_ctx *exec_ctx,
   _val.dbl = value;
   if (_val.uint < 4637863191261478912ull) {
     int bucket =
-        grpc_stats_table_3[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
-    _bkt.dbl = grpc_stats_table_2[bucket];
+        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);
@@ -277,10 +508,11 @@ void grpc_stats_inc_tcp_read_offer_iov_size(grpc_exec_ctx *exec_ctx,
   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_2, 64));
+                               (exec_ctx), value, grpc_stats_table_6, 64));
 }
 void grpc_stats_inc_http2_send_message_size(grpc_exec_ctx *exec_ctx,
                                             int value) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
   value = GPR_CLAMP(value, 0, 16777216);
   if (value < 5) {
     GRPC_STATS_INC_HISTOGRAM(
@@ -294,8 +526,8 @@ void grpc_stats_inc_http2_send_message_size(grpc_exec_ctx *exec_ctx,
   _val.dbl = value;
   if (_val.uint < 4683743612465315840ull) {
     int bucket =
-        grpc_stats_table_1[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
-    _bkt.dbl = grpc_stats_table_0[bucket];
+        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);
@@ -304,10 +536,11 @@ void grpc_stats_inc_http2_send_message_size(grpc_exec_ctx *exec_ctx,
   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_0, 64));
+                               (exec_ctx), value, grpc_stats_table_4, 64));
 }
 void grpc_stats_inc_http2_send_initial_metadata_per_write(
     grpc_exec_ctx *exec_ctx, int value) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 13) {
     GRPC_STATS_INC_HISTOGRAM(
@@ -322,8 +555,8 @@ void grpc_stats_inc_http2_send_initial_metadata_per_write(
   _val.dbl = value;
   if (_val.uint < 4637863191261478912ull) {
     int bucket =
-        grpc_stats_table_3[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
-    _bkt.dbl = grpc_stats_table_2[bucket];
+        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_INITIAL_METADATA_PER_WRITE,
@@ -332,11 +565,12 @@ void grpc_stats_inc_http2_send_initial_metadata_per_write(
   }
   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_2,
+      grpc_stats_histo_find_bucket_slow((exec_ctx), value, grpc_stats_table_6,
                                         64));
 }
 void grpc_stats_inc_http2_send_message_per_write(grpc_exec_ctx *exec_ctx,
                                                  int value) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 13) {
     GRPC_STATS_INC_HISTOGRAM(
@@ -350,8 +584,8 @@ void grpc_stats_inc_http2_send_message_per_write(grpc_exec_ctx *exec_ctx,
   _val.dbl = value;
   if (_val.uint < 4637863191261478912ull) {
     int bucket =
-        grpc_stats_table_3[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
-    _bkt.dbl = grpc_stats_table_2[bucket];
+        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);
@@ -360,10 +594,11 @@ void grpc_stats_inc_http2_send_message_per_write(grpc_exec_ctx *exec_ctx,
   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_2, 64));
+                               (exec_ctx), value, grpc_stats_table_6, 64));
 }
 void grpc_stats_inc_http2_send_trailing_metadata_per_write(
     grpc_exec_ctx *exec_ctx, int value) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 13) {
     GRPC_STATS_INC_HISTOGRAM(
@@ -378,8 +613,8 @@ void grpc_stats_inc_http2_send_trailing_metadata_per_write(
   _val.dbl = value;
   if (_val.uint < 4637863191261478912ull) {
     int bucket =
-        grpc_stats_table_3[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
-    _bkt.dbl = grpc_stats_table_2[bucket];
+        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_TRAILING_METADATA_PER_WRITE,
@@ -388,11 +623,12 @@ void grpc_stats_inc_http2_send_trailing_metadata_per_write(
   }
   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_2,
+      grpc_stats_histo_find_bucket_slow((exec_ctx), value, grpc_stats_table_6,
                                         64));
 }
 void grpc_stats_inc_http2_send_flowctl_per_write(grpc_exec_ctx *exec_ctx,
                                                  int value) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 13) {
     GRPC_STATS_INC_HISTOGRAM(
@@ -406,8 +642,8 @@ void grpc_stats_inc_http2_send_flowctl_per_write(grpc_exec_ctx *exec_ctx,
   _val.dbl = value;
   if (_val.uint < 4637863191261478912ull) {
     int bucket =
-        grpc_stats_table_3[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
-    _bkt.dbl = grpc_stats_table_2[bucket];
+        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);
@@ -416,18 +652,75 @@ void grpc_stats_inc_http2_send_flowctl_per_write(grpc_exec_ctx *exec_ctx,
   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_2, 64));
+                               (exec_ctx), value, grpc_stats_table_6, 64));
+}
+void grpc_stats_inc_executor_closures_per_wakeup(grpc_exec_ctx *exec_ctx,
+                                                 int value) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
+  value = GPR_CLAMP(value, 0, 1024);
+  if (value < 13) {
+    GRPC_STATS_INC_HISTOGRAM(
+        (exec_ctx), GRPC_STATS_HISTOGRAM_EXECUTOR_CLOSURES_PER_WAKEUP, value);
+    return;
+  }
+  union {
+    double dbl;
+    uint64_t uint;
+  } _val, _bkt;
+  _val.dbl = value;
+  if (_val.uint < 4637863191261478912ull) {
+    int bucket =
+        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_EXECUTOR_CLOSURES_PER_WAKEUP, bucket);
+    return;
+  }
+  GRPC_STATS_INC_HISTOGRAM((exec_ctx),
+                           GRPC_STATS_HISTOGRAM_EXECUTOR_CLOSURES_PER_WAKEUP,
+                           grpc_stats_histo_find_bucket_slow(
+                               (exec_ctx), value, grpc_stats_table_6, 64));
+}
+void grpc_stats_inc_server_cqs_checked(grpc_exec_ctx *exec_ctx, int value) {
+  /* Automatically generated by tools/codegen/core/gen_stats_data.py */
+  value = GPR_CLAMP(value, 0, 64);
+  if (value < 3) {
+    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
+                             GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED, value);
+    return;
+  }
+  union {
+    double dbl;
+    uint64_t uint;
+  } _val, _bkt;
+  _val.dbl = value;
+  if (_val.uint < 4625196817309499392ull) {
+    int bucket =
+        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);
+    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));
 }
-const int grpc_stats_histo_buckets[10] = {64, 64, 64, 64, 64,
-                                          64, 64, 64, 64, 64};
-const int grpc_stats_histo_start[10] = {0,   64,  128, 192, 256,
-                                        320, 384, 448, 512, 576};
-const int *const grpc_stats_histo_bucket_boundaries[10] = {
-    grpc_stats_table_0, grpc_stats_table_2, grpc_stats_table_0,
-    grpc_stats_table_0, grpc_stats_table_2, grpc_stats_table_0,
-    grpc_stats_table_2, grpc_stats_table_2, grpc_stats_table_2,
-    grpc_stats_table_2};
-void (*const grpc_stats_inc_histogram[10])(grpc_exec_ctx *exec_ctx, int x) = {
+const int grpc_stats_histo_buckets[14] = {64, 128, 64, 64, 64, 64, 64,
+                                          64, 64,  64, 64, 64, 64, 8};
+const int grpc_stats_histo_start[14] = {0,   64,  192, 256, 320, 384, 448,
+                                        512, 576, 640, 704, 768, 832, 896};
+const int *const grpc_stats_histo_bucket_boundaries[14] = {
+    grpc_stats_table_0, grpc_stats_table_2, grpc_stats_table_4,
+    grpc_stats_table_6, grpc_stats_table_4, grpc_stats_table_4,
+    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_6, grpc_stats_table_8};
+void (*const grpc_stats_inc_histogram[14])(grpc_exec_ctx *exec_ctx, int x) = {
+    grpc_stats_inc_call_initial_size,
+    grpc_stats_inc_poll_events_returned,
     grpc_stats_inc_tcp_write_size,
     grpc_stats_inc_tcp_write_iov_size,
     grpc_stats_inc_tcp_read_size,
@@ -437,4 +730,6 @@ void (*const grpc_stats_inc_histogram[10])(grpc_exec_ctx *exec_ctx, int x) = {
     grpc_stats_inc_http2_send_initial_metadata_per_write,
     grpc_stats_inc_http2_send_message_per_write,
     grpc_stats_inc_http2_send_trailing_metadata_per_write,
-    grpc_stats_inc_http2_send_flowctl_per_write};
+    grpc_stats_inc_http2_send_flowctl_per_write,
+    grpc_stats_inc_executor_closures_per_wakeup,
+    grpc_stats_inc_server_cqs_checked};
diff --git a/src/core/lib/debug/stats_data.h b/src/core/lib/debug/stats_data.h
index b7c15c08a5..6c0ad30543 100644
--- a/src/core/lib/debug/stats_data.h
+++ b/src/core/lib/debug/stats_data.h
@@ -27,8 +27,18 @@
 typedef enum {
   GRPC_STATS_COUNTER_CLIENT_CALLS_CREATED,
   GRPC_STATS_COUNTER_SERVER_CALLS_CREATED,
+  GRPC_STATS_COUNTER_CQS_CREATED,
+  GRPC_STATS_COUNTER_CLIENT_CHANNELS_CREATED,
+  GRPC_STATS_COUNTER_CLIENT_SUBCHANNELS_CREATED,
+  GRPC_STATS_COUNTER_SERVER_CHANNELS_CREATED,
   GRPC_STATS_COUNTER_SYSCALL_POLL,
   GRPC_STATS_COUNTER_SYSCALL_WAIT,
+  GRPC_STATS_COUNTER_POLLSET_KICK,
+  GRPC_STATS_COUNTER_POLLSET_KICKED_WITHOUT_POLLER,
+  GRPC_STATS_COUNTER_POLLSET_KICKED_AGAIN,
+  GRPC_STATS_COUNTER_POLLSET_KICK_WAKEUP_FD,
+  GRPC_STATS_COUNTER_POLLSET_KICK_WAKEUP_CV,
+  GRPC_STATS_COUNTER_POLLSET_KICK_OWN_THREAD,
   GRPC_STATS_COUNTER_HISTOGRAM_SLOW_LOOKUPS,
   GRPC_STATS_COUNTER_SYSCALL_WRITE,
   GRPC_STATS_COUNTER_SYSCALL_READ,
@@ -48,6 +58,49 @@ typedef enum {
   GRPC_STATS_COUNTER_HTTP2_WRITES_OFFLOADED,
   GRPC_STATS_COUNTER_HTTP2_WRITES_CONTINUED,
   GRPC_STATS_COUNTER_HTTP2_PARTIAL_WRITES,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_INITIAL_WRITE,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_START_NEW_STREAM,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_TRAILING_METADATA,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_RETRY_SEND_PING,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_CONTINUE_PINGS,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_CLOSE_FROM_API,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_STREAM_FLOW_CONTROL,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_SETTINGS,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_BDP_ESTIMATOR_PING,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_SETTING,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_UPDATE,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_APPLICATION_PING,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_KEEPALIVE_PING,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE,
+  GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM,
+  GRPC_STATS_COUNTER_HPACK_RECV_INDEXED,
+  GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_INCIDX,
+  GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_INCIDX_V,
+  GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NOTIDX,
+  GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NOTIDX_V,
+  GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NVRIDX,
+  GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NVRIDX_V,
+  GRPC_STATS_COUNTER_HPACK_RECV_UNCOMPRESSED,
+  GRPC_STATS_COUNTER_HPACK_RECV_HUFFMAN,
+  GRPC_STATS_COUNTER_HPACK_RECV_BINARY,
+  GRPC_STATS_COUNTER_HPACK_RECV_BINARY_BASE64,
+  GRPC_STATS_COUNTER_HPACK_SEND_INDEXED,
+  GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_INCIDX,
+  GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_INCIDX_V,
+  GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NOTIDX,
+  GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NOTIDX_V,
+  GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NVRIDX,
+  GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NVRIDX_V,
+  GRPC_STATS_COUNTER_HPACK_SEND_UNCOMPRESSED,
+  GRPC_STATS_COUNTER_HPACK_SEND_HUFFMAN,
+  GRPC_STATS_COUNTER_HPACK_SEND_BINARY,
+  GRPC_STATS_COUNTER_HPACK_SEND_BINARY_BASE64,
   GRPC_STATS_COUNTER_COMBINER_LOCKS_INITIATED,
   GRPC_STATS_COUNTER_COMBINER_LOCKS_SCHEDULED_ITEMS,
   GRPC_STATS_COUNTER_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS,
@@ -58,11 +111,17 @@ typedef enum {
   GRPC_STATS_COUNTER_EXECUTOR_WAKEUP_INITIATED,
   GRPC_STATS_COUNTER_EXECUTOR_QUEUE_DRAINED,
   GRPC_STATS_COUNTER_EXECUTOR_PUSH_RETRIES,
+  GRPC_STATS_COUNTER_EXECUTOR_THREADS_CREATED,
+  GRPC_STATS_COUNTER_EXECUTOR_THREADS_USED,
+  GRPC_STATS_COUNTER_SERVER_REQUESTED_CALLS,
+  GRPC_STATS_COUNTER_SERVER_SLOWPATH_REQUESTS_QUEUED,
   GRPC_STATS_COUNTER_COUNT
 } grpc_stats_counters;
 extern const char *grpc_stats_counter_name[GRPC_STATS_COUNTER_COUNT];
 extern const char *grpc_stats_counter_doc[GRPC_STATS_COUNTER_COUNT];
 typedef enum {
+  GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE,
+  GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED,
   GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE,
   GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE,
   GRPC_STATS_HISTOGRAM_TCP_READ_SIZE,
@@ -73,41 +132,73 @@ typedef enum {
   GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE,
   GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE,
   GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE,
+  GRPC_STATS_HISTOGRAM_EXECUTOR_CLOSURES_PER_WAKEUP,
+  GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED,
   GRPC_STATS_HISTOGRAM_COUNT
 } grpc_stats_histograms;
 extern const char *grpc_stats_histogram_name[GRPC_STATS_HISTOGRAM_COUNT];
 extern const char *grpc_stats_histogram_doc[GRPC_STATS_HISTOGRAM_COUNT];
 typedef enum {
-  GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE_FIRST_SLOT = 0,
+  GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE_FIRST_SLOT = 0,
+  GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE_BUCKETS = 64,
+  GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED_FIRST_SLOT = 64,
+  GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED_BUCKETS = 128,
+  GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE_FIRST_SLOT = 192,
   GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE_BUCKETS = 64,
-  GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE_FIRST_SLOT = 64,
+  GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE_FIRST_SLOT = 256,
   GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE_BUCKETS = 64,
-  GRPC_STATS_HISTOGRAM_TCP_READ_SIZE_FIRST_SLOT = 128,
+  GRPC_STATS_HISTOGRAM_TCP_READ_SIZE_FIRST_SLOT = 320,
   GRPC_STATS_HISTOGRAM_TCP_READ_SIZE_BUCKETS = 64,
-  GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_FIRST_SLOT = 192,
+  GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_FIRST_SLOT = 384,
   GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_BUCKETS = 64,
-  GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE_FIRST_SLOT = 256,
+  GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE_FIRST_SLOT = 448,
   GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE_BUCKETS = 64,
-  GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE_FIRST_SLOT = 320,
+  GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE_FIRST_SLOT = 512,
   GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE_BUCKETS = 64,
-  GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE_FIRST_SLOT = 384,
+  GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE_FIRST_SLOT = 576,
   GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE_BUCKETS = 64,
-  GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE_FIRST_SLOT = 448,
+  GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE_FIRST_SLOT = 640,
   GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE_BUCKETS = 64,
-  GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE_FIRST_SLOT = 512,
+  GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE_FIRST_SLOT = 704,
   GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE_BUCKETS = 64,
-  GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE_FIRST_SLOT = 576,
+  GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE_FIRST_SLOT = 768,
   GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE_BUCKETS = 64,
-  GRPC_STATS_HISTOGRAM_BUCKETS = 640
+  GRPC_STATS_HISTOGRAM_EXECUTOR_CLOSURES_PER_WAKEUP_FIRST_SLOT = 832,
+  GRPC_STATS_HISTOGRAM_EXECUTOR_CLOSURES_PER_WAKEUP_BUCKETS = 64,
+  GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED_FIRST_SLOT = 896,
+  GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED_BUCKETS = 8,
+  GRPC_STATS_HISTOGRAM_BUCKETS = 904
 } 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) \
@@ -151,6 +242,153 @@ typedef enum {
   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),                                                          \
+      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),                                                             \
+      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)                                                              \
+  GRPC_STATS_INC_COUNTER(                                                  \
+      (exec_ctx),                                                          \
+      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),                                                            \
+      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),                                                           \
+      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),                                                           \
+      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),                                                       \
+      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),                                                          \
+      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),                                                          \
+      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),                                                      \
+      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),                                                                     \
+      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),                                                                    \
+      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),                                                             \
+      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),                                                           \
+      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),                                                                    \
+      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),                                                          \
+      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_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)
@@ -179,6 +417,22 @@ typedef enum {
   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_EXECUTOR_THREADS_CREATED(exec_ctx) \
+  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
+                         GRPC_STATS_COUNTER_EXECUTOR_THREADS_CREATED)
+#define GRPC_STATS_INC_EXECUTOR_THREADS_USED(exec_ctx) \
+  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_EXECUTOR_THREADS_USED)
+#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_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);
@@ -214,10 +468,17 @@ void grpc_stats_inc_http2_send_trailing_metadata_per_write(
   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);
-extern const int grpc_stats_histo_buckets[10];
-extern const int grpc_stats_histo_start[10];
-extern const int *const grpc_stats_histo_bucket_boundaries[10];
-extern void (*const grpc_stats_inc_histogram[10])(grpc_exec_ctx *exec_ctx,
+#define GRPC_STATS_INC_EXECUTOR_CLOSURES_PER_WAKEUP(exec_ctx, value) \
+  grpc_stats_inc_executor_closures_per_wakeup((exec_ctx), (int)(value))
+void grpc_stats_inc_executor_closures_per_wakeup(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);
+extern const int grpc_stats_histo_buckets[14];
+extern const int grpc_stats_histo_start[14];
+extern const int *const grpc_stats_histo_bucket_boundaries[14];
+extern void (*const grpc_stats_inc_histogram[14])(grpc_exec_ctx *exec_ctx,
                                                   int x);
 
 #endif /* GRPC_CORE_LIB_DEBUG_STATS_DATA_H */
diff --git a/src/core/lib/debug/stats_data.yaml b/src/core/lib/debug/stats_data.yaml
index a9d71f4fcb..de575f01c7 100644
--- a/src/core/lib/debug/stats_data.yaml
+++ b/src/core/lib/debug/stats_data.yaml
@@ -20,11 +20,49 @@
   doc: Number of client side calls created by this process
 - counter: server_calls_created
   doc: Number of server side calls created by this process
+- histogram: call_initial_size
+  max: 262144
+  buckets: 64
+  doc: Initial size of the grpc_call arena created at call start
+- counter: cqs_created
+  doc: Number of completion queues created
+- counter: client_channels_created
+  doc: Number of client channels created
+- counter: client_subchannels_created
+  doc: Number of client subchannels created
+- counter: server_channels_created
+  doc: Number of server channels created
 # polling
 - counter: syscall_poll
   doc: Number of polling syscalls (epoll_wait, poll, etc) made by this process
 - counter: syscall_wait
   doc: Number of sleeping syscalls made by this process
+- histogram: poll_events_returned
+  max: 1024
+  buckets: 128
+  doc: How many events are called for each syscall_poll
+- counter: pollset_kick
+  doc: How many polling wakeups were performed by the process
+       (only valid for epoll1 right now)
+- counter: pollset_kicked_without_poller
+  doc: How many times was a polling wakeup requested without an active poller
+       (only valid for epoll1 right now)
+- counter: pollset_kicked_again
+  doc: How many times was the same polling worker awoken repeatedly before
+       waking up
+       (only valid for epoll1 right now)
+- counter: pollset_kick_wakeup_fd
+  doc: How many times was an eventfd used as the wakeup vector for a polling
+       wakeup
+       (only valid for epoll1 right now)
+- counter: pollset_kick_wakeup_cv
+  doc: How many times was a condition variable used as the wakeup vector for a
+       polling wakeup
+       (only valid for epoll1 right now)
+- counter: pollset_kick_own_thread
+  doc: How many times could a polling wakeup be satisfied by keeping the waking
+       thread awake?
+       (only valid for epoll1 right now)
 # stats system
 - counter: histogram_slow_lookups
   doc: Number of times histogram increments went through the slow
@@ -109,6 +147,92 @@
 - counter: http2_partial_writes
   doc: Number of HTTP2 writes that were made knowing there was still more data
        to be written (we cap maximum write size to syscall_write)
+- counter: http2_initiate_write_due_to_initial_write
+  doc: Number of HTTP2 writes initiated due to 'initial_write'
+- counter: http2_initiate_write_due_to_start_new_stream
+  doc: Number of HTTP2 writes initiated due to 'start_new_stream'
+- counter: http2_initiate_write_due_to_send_message
+  doc: Number of HTTP2 writes initiated due to 'send_message'
+- counter: http2_initiate_write_due_to_send_initial_metadata
+  doc: Number of HTTP2 writes initiated due to 'send_initial_metadata'
+- counter: http2_initiate_write_due_to_send_trailing_metadata
+  doc: Number of HTTP2 writes initiated due to 'send_trailing_metadata'
+- counter: http2_initiate_write_due_to_retry_send_ping
+  doc: Number of HTTP2 writes initiated due to 'retry_send_ping'
+- counter: http2_initiate_write_due_to_continue_pings
+  doc: Number of HTTP2 writes initiated due to 'continue_pings'
+- counter: http2_initiate_write_due_to_goaway_sent
+  doc: Number of HTTP2 writes initiated due to 'goaway_sent'
+- counter: http2_initiate_write_due_to_rst_stream
+  doc: Number of HTTP2 writes initiated due to 'rst_stream'
+- counter: http2_initiate_write_due_to_close_from_api
+  doc: Number of HTTP2 writes initiated due to 'close_from_api'
+- counter: http2_initiate_write_due_to_stream_flow_control
+  doc: Number of HTTP2 writes initiated due to 'stream_flow_control'
+- counter: http2_initiate_write_due_to_transport_flow_control
+  doc: Number of HTTP2 writes initiated due to 'transport_flow_control'
+- counter: http2_initiate_write_due_to_send_settings
+  doc: Number of HTTP2 writes initiated due to 'send_settings'
+- counter: http2_initiate_write_due_to_bdp_estimator_ping
+  doc: Number of HTTP2 writes initiated due to 'bdp_estimator_ping'
+- counter: http2_initiate_write_due_to_flow_control_unstalled_by_setting
+  doc: Number of HTTP2 writes initiated due to 'flow_control_unstalled_by_setting'
+- counter: http2_initiate_write_due_to_flow_control_unstalled_by_update
+  doc: Number of HTTP2 writes initiated due to 'flow_control_unstalled_by_update'
+- counter: http2_initiate_write_due_to_application_ping
+  doc: Number of HTTP2 writes initiated due to 'application_ping'
+- counter: http2_initiate_write_due_to_keepalive_ping
+  doc: Number of HTTP2 writes initiated due to 'keepalive_ping'
+- counter: http2_initiate_write_due_to_transport_flow_control_unstalled
+  doc: Number of HTTP2 writes initiated due to 'transport_flow_control_unstalled'
+- counter: http2_initiate_write_due_to_ping_response
+  doc: Number of HTTP2 writes initiated due to 'ping_response'
+- counter: http2_initiate_write_due_to_force_rst_stream
+  doc: Number of HTTP2 writes initiated due to 'force_rst_stream'
+- counter: hpack_recv_indexed
+  doc: Number of HPACK indexed fields received
+- counter: hpack_recv_lithdr_incidx
+  doc: Number of HPACK literal headers received with incremental indexing
+- counter: hpack_recv_lithdr_incidx_v
+  doc: Number of HPACK literal headers received with incremental indexing and literal keys
+- counter: hpack_recv_lithdr_notidx
+  doc: Number of HPACK literal headers received with no indexing
+- counter: hpack_recv_lithdr_notidx_v
+  doc: Number of HPACK literal headers received with no indexing and literal keys
+- counter: hpack_recv_lithdr_nvridx
+  doc: Number of HPACK literal headers received with never-indexing
+- counter: hpack_recv_lithdr_nvridx_v
+  doc: Number of HPACK literal headers received with never-indexing and literal keys
+- counter: hpack_recv_uncompressed
+  doc: Number of uncompressed strings received in metadata
+- counter: hpack_recv_huffman
+  doc: Number of huffman encoded strings received in metadata
+- counter: hpack_recv_binary
+  doc: Number of binary strings received in metadata
+- counter: hpack_recv_binary_base64
+  doc: Number of binary strings received encoded in base64 in metadata
+- counter: hpack_send_indexed
+  doc: Number of HPACK indexed fields sent
+- counter: hpack_send_lithdr_incidx
+  doc: Number of HPACK literal headers sent with incremental indexing
+- counter: hpack_send_lithdr_incidx_v
+  doc: Number of HPACK literal headers sent with incremental indexing and literal keys
+- counter: hpack_send_lithdr_notidx
+  doc: Number of HPACK literal headers sent with no indexing
+- counter: hpack_send_lithdr_notidx_v
+  doc: Number of HPACK literal headers sent with no indexing and literal keys
+- counter: hpack_send_lithdr_nvridx
+  doc: Number of HPACK literal headers sent with never-indexing
+- counter: hpack_send_lithdr_nvridx_v
+  doc: Number of HPACK literal headers sent with never-indexing and literal keys
+- counter: hpack_send_uncompressed
+  doc: Number of uncompressed strings sent in metadata
+- counter: hpack_send_huffman
+  doc: Number of huffman encoded strings sent in metadata
+- counter: hpack_send_binary
+  doc: Number of binary strings received in metadata
+- counter: hpack_send_binary_base64
+  doc: Number of binary strings received encoded in base64 in metadata
 # combiner locks
 - counter: combiner_locks_initiated
   doc: Number of combiner lock entries by process
@@ -135,3 +259,22 @@
 - counter: executor_push_retries
   doc: Number of times we raced and were forced to retry pushing a closure to
        the executor
+- counter: executor_threads_created
+  doc: Size of the backing thread pool for overflow gRPC Core work
+- counter: executor_threads_used
+  doc: How many executor threads actually got used
+- histogram: executor_closures_per_wakeup
+  max: 1024
+  buckets: 64
+  doc: Number of closures executed each time an executor wakes up
+# server
+- counter: server_requested_calls
+  doc: How many calls were requested (not necessarily received) by the server
+- histogram: server_cqs_checked
+  buckets: 8
+  max: 64
+  doc: How many completion queues were checked looking for a CQ that had
+       requested the incoming call
+- counter: server_slowpath_requests_queued
+  doc: How many times was the server slow path taken (indicates too few
+       outstanding requests)
diff --git a/src/core/lib/debug/stats_data_bq_schema.sql b/src/core/lib/debug/stats_data_bq_schema.sql
new file mode 100644
index 0000000000..0611ccaff0
--- /dev/null
+++ b/src/core/lib/debug/stats_data_bq_schema.sql
@@ -0,0 +1,90 @@
+client_calls_created_per_iteration:FLOAT,
+server_calls_created_per_iteration:FLOAT,
+cqs_created_per_iteration:FLOAT,
+client_channels_created_per_iteration:FLOAT,
+client_subchannels_created_per_iteration:FLOAT,
+server_channels_created_per_iteration:FLOAT,
+syscall_poll_per_iteration:FLOAT,
+syscall_wait_per_iteration:FLOAT,
+pollset_kick_per_iteration:FLOAT,
+pollset_kicked_without_poller_per_iteration:FLOAT,
+pollset_kicked_again_per_iteration:FLOAT,
+pollset_kick_wakeup_fd_per_iteration:FLOAT,
+pollset_kick_wakeup_cv_per_iteration:FLOAT,
+pollset_kick_own_thread_per_iteration:FLOAT,
+histogram_slow_lookups_per_iteration:FLOAT,
+syscall_write_per_iteration:FLOAT,
+syscall_read_per_iteration:FLOAT,
+tcp_backup_pollers_created_per_iteration:FLOAT,
+tcp_backup_poller_polls_per_iteration:FLOAT,
+http2_op_batches_per_iteration:FLOAT,
+http2_op_cancel_per_iteration:FLOAT,
+http2_op_send_initial_metadata_per_iteration:FLOAT,
+http2_op_send_message_per_iteration:FLOAT,
+http2_op_send_trailing_metadata_per_iteration:FLOAT,
+http2_op_recv_initial_metadata_per_iteration:FLOAT,
+http2_op_recv_message_per_iteration:FLOAT,
+http2_op_recv_trailing_metadata_per_iteration:FLOAT,
+http2_settings_writes_per_iteration:FLOAT,
+http2_pings_sent_per_iteration:FLOAT,
+http2_writes_begun_per_iteration:FLOAT,
+http2_writes_offloaded_per_iteration:FLOAT,
+http2_writes_continued_per_iteration:FLOAT,
+http2_partial_writes_per_iteration:FLOAT,
+http2_initiate_write_due_to_initial_write_per_iteration:FLOAT,
+http2_initiate_write_due_to_start_new_stream_per_iteration:FLOAT,
+http2_initiate_write_due_to_send_message_per_iteration:FLOAT,
+http2_initiate_write_due_to_send_initial_metadata_per_iteration:FLOAT,
+http2_initiate_write_due_to_send_trailing_metadata_per_iteration:FLOAT,
+http2_initiate_write_due_to_retry_send_ping_per_iteration:FLOAT,
+http2_initiate_write_due_to_continue_pings_per_iteration:FLOAT,
+http2_initiate_write_due_to_goaway_sent_per_iteration:FLOAT,
+http2_initiate_write_due_to_rst_stream_per_iteration:FLOAT,
+http2_initiate_write_due_to_close_from_api_per_iteration:FLOAT,
+http2_initiate_write_due_to_stream_flow_control_per_iteration:FLOAT,
+http2_initiate_write_due_to_transport_flow_control_per_iteration:FLOAT,
+http2_initiate_write_due_to_send_settings_per_iteration:FLOAT,
+http2_initiate_write_due_to_bdp_estimator_ping_per_iteration:FLOAT,
+http2_initiate_write_due_to_flow_control_unstalled_by_setting_per_iteration:FLOAT,
+http2_initiate_write_due_to_flow_control_unstalled_by_update_per_iteration:FLOAT,
+http2_initiate_write_due_to_application_ping_per_iteration:FLOAT,
+http2_initiate_write_due_to_keepalive_ping_per_iteration:FLOAT,
+http2_initiate_write_due_to_transport_flow_control_unstalled_per_iteration:FLOAT,
+http2_initiate_write_due_to_ping_response_per_iteration:FLOAT,
+http2_initiate_write_due_to_force_rst_stream_per_iteration:FLOAT,
+hpack_recv_indexed_per_iteration:FLOAT,
+hpack_recv_lithdr_incidx_per_iteration:FLOAT,
+hpack_recv_lithdr_incidx_v_per_iteration:FLOAT,
+hpack_recv_lithdr_notidx_per_iteration:FLOAT,
+hpack_recv_lithdr_notidx_v_per_iteration:FLOAT,
+hpack_recv_lithdr_nvridx_per_iteration:FLOAT,
+hpack_recv_lithdr_nvridx_v_per_iteration:FLOAT,
+hpack_recv_uncompressed_per_iteration:FLOAT,
+hpack_recv_huffman_per_iteration:FLOAT,
+hpack_recv_binary_per_iteration:FLOAT,
+hpack_recv_binary_base64_per_iteration:FLOAT,
+hpack_send_indexed_per_iteration:FLOAT,
+hpack_send_lithdr_incidx_per_iteration:FLOAT,
+hpack_send_lithdr_incidx_v_per_iteration:FLOAT,
+hpack_send_lithdr_notidx_per_iteration:FLOAT,
+hpack_send_lithdr_notidx_v_per_iteration:FLOAT,
+hpack_send_lithdr_nvridx_per_iteration:FLOAT,
+hpack_send_lithdr_nvridx_v_per_iteration:FLOAT,
+hpack_send_uncompressed_per_iteration:FLOAT,
+hpack_send_huffman_per_iteration:FLOAT,
+hpack_send_binary_per_iteration:FLOAT,
+hpack_send_binary_base64_per_iteration:FLOAT,
+combiner_locks_initiated_per_iteration:FLOAT,
+combiner_locks_scheduled_items_per_iteration:FLOAT,
+combiner_locks_scheduled_final_items_per_iteration:FLOAT,
+combiner_locks_offloaded_per_iteration:FLOAT,
+executor_scheduled_short_items_per_iteration:FLOAT,
+executor_scheduled_long_items_per_iteration:FLOAT,
+executor_scheduled_to_self_per_iteration:FLOAT,
+executor_wakeup_initiated_per_iteration:FLOAT,
+executor_queue_drained_per_iteration:FLOAT,
+executor_push_retries_per_iteration:FLOAT,
+executor_threads_created_per_iteration:FLOAT,
+executor_threads_used_per_iteration:FLOAT,
+server_requested_calls_per_iteration:FLOAT,
+server_slowpath_requests_queued_per_iteration:FLOAT
diff --git a/src/core/lib/debug/trace.h b/src/core/lib/debug/trace.h
index dd9e6a30fe..64f2e3fc33 100644
--- a/src/core/lib/debug/trace.h
+++ b/src/core/lib/debug/trace.h
@@ -35,7 +35,7 @@ typedef struct {
 #else
   bool value;
 #endif
-  char *name;
+  const char *name;
 } grpc_tracer_flag;
 
 #ifdef GRPC_THREADSAFE_TRACER
diff --git a/src/core/lib/http/httpcli.c b/src/core/lib/http/httpcli.c
index 84cc39604c..db995943a9 100644
--- a/src/core/lib/http/httpcli.c
+++ b/src/core/lib/http/httpcli.c
@@ -217,7 +217,7 @@ static void next_address(grpc_exec_ctx *exec_ctx, internal_request *req,
   GRPC_CLOSURE_INIT(&req->connected, on_connected, req,
                     grpc_schedule_on_exec_ctx);
   grpc_arg arg = grpc_channel_arg_pointer_create(
-      GRPC_ARG_RESOURCE_QUOTA, req->resource_quota,
+      (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,
diff --git a/src/core/lib/http/httpcli_security_connector.c b/src/core/lib/http/httpcli_security_connector.c
index 97c2886525..c553fa3981 100644
--- a/src/core/lib/http/httpcli_security_connector.c
+++ b/src/core/lib/http/httpcli_security_connector.c
@@ -43,7 +43,8 @@ static void httpcli_ssl_destroy(grpc_exec_ctx *exec_ctx,
   grpc_httpcli_ssl_channel_security_connector *c =
       (grpc_httpcli_ssl_channel_security_connector *)sc;
   if (c->handshaker_factory != NULL) {
-    tsi_ssl_client_handshaker_factory_destroy(c->handshaker_factory);
+    tsi_ssl_client_handshaker_factory_unref(c->handshaker_factory);
+    c->handshaker_factory = NULL;
   }
   if (c->secure_peer_name != NULL) gpr_free(c->secure_peer_name);
   gpr_free(sc);
diff --git a/src/core/lib/iomgr/closure.c b/src/core/lib/iomgr/closure.c
index 7236e23cf7..00edefc6ae 100644
--- a/src/core/lib/iomgr/closure.c
+++ b/src/core/lib/iomgr/closure.c
@@ -167,7 +167,14 @@ void grpc_closure_sched(grpc_exec_ctx *exec_ctx, grpc_closure *c,
   GPR_TIMER_BEGIN("grpc_closure_sched", 0);
   if (c != NULL) {
 #ifndef NDEBUG
-    GPR_ASSERT(!c->scheduled);
+    if (c->scheduled) {
+      gpr_log(GPR_ERROR,
+              "Closure already scheduled. (closure: %p, created: [%s:%d], "
+              "previously scheduled at: [%s: %d] run?: %s",
+              c, c->file_created, c->line_created, c->file_initiated,
+              c->line_initiated, c->run ? "true" : "false");
+      abort();
+    }
     c->scheduled = true;
     c->file_initiated = file;
     c->line_initiated = line;
@@ -191,7 +198,14 @@ void grpc_closure_list_sched(grpc_exec_ctx *exec_ctx, grpc_closure_list *list) {
   while (c != NULL) {
     grpc_closure *next = c->next_data.next;
 #ifndef NDEBUG
-    GPR_ASSERT(!c->scheduled);
+    if (c->scheduled) {
+      gpr_log(GPR_ERROR,
+              "Closure already scheduled. (closure: %p, created: [%s:%d], "
+              "previously scheduled at: [%s: %d] run?: %s",
+              c, c->file_created, c->line_created, c->file_initiated,
+              c->line_initiated, c->run ? "true" : "false");
+      abort();
+    }
     c->scheduled = true;
     c->file_initiated = file;
     c->line_initiated = line;
diff --git a/src/core/lib/iomgr/combiner.c b/src/core/lib/iomgr/combiner.c
index 360967f3ba..f899b25f10 100644
--- a/src/core/lib/iomgr/combiner.c
+++ b/src/core/lib/iomgr/combiner.c
@@ -356,7 +356,8 @@ static void combiner_finally_exec(grpc_exec_ctx *exec_ctx,
 
 static void enqueue_finally(grpc_exec_ctx *exec_ctx, void *closure,
                             grpc_error *error) {
-  combiner_finally_exec(exec_ctx, closure, GRPC_ERROR_REF(error));
+  combiner_finally_exec(exec_ctx, (grpc_closure *)closure,
+                        GRPC_ERROR_REF(error));
 }
 
 grpc_closure_scheduler *grpc_combiner_scheduler(grpc_combiner *combiner) {
diff --git a/src/core/lib/iomgr/error.c b/src/core/lib/iomgr/error.c
index dcd175a2e1..aa05501537 100644
--- a/src/core/lib/iomgr/error.c
+++ b/src/core/lib/iomgr/error.c
@@ -278,13 +278,13 @@ static void internal_set_time(grpc_error **err, grpc_error_times which,
   memcpy((*err)->arena + slot, &value, sizeof(value));
 }
 
-static void internal_add_error(grpc_error **err, grpc_error *new) {
-  grpc_linked_error new_last = {new, UINT8_MAX};
+static void internal_add_error(grpc_error **err, grpc_error *new_err) {
+  grpc_linked_error new_last = {new_err, UINT8_MAX};
   uint8_t slot = get_placement(err, sizeof(grpc_linked_error));
   if (slot == UINT8_MAX) {
-    gpr_log(GPR_ERROR, "Error %p is full, dropping error %p = %s", *err, new,
-            grpc_error_string(new));
-    GRPC_ERROR_UNREF(new);
+    gpr_log(GPR_ERROR, "Error %p is full, dropping error %p = %s", *err,
+            new_err, grpc_error_string(new_err));
+    GRPC_ERROR_UNREF(new_err);
     return;
   }
   if ((*err)->first_err == UINT8_MAX) {
@@ -321,8 +321,8 @@ grpc_error *grpc_error_create(const char *file, int line, grpc_slice desc,
   uint8_t initial_arena_capacity = (uint8_t)(
       DEFAULT_ERROR_CAPACITY +
       (uint8_t)(num_referencing * SLOTS_PER_LINKED_ERROR) + SURPLUS_CAPACITY);
-  grpc_error *err =
-      gpr_malloc(sizeof(*err) + initial_arena_capacity * sizeof(intptr_t));
+  grpc_error *err = (grpc_error *)gpr_malloc(
+      sizeof(*err) + initial_arena_capacity * sizeof(intptr_t));
   if (err == NULL) {  // TODO(ctiller): make gpr_malloc return NULL
     return GRPC_ERROR_OOM;
   }
@@ -432,10 +432,10 @@ static grpc_error *copy_error_and_unref(grpc_error *in) {
 grpc_error *grpc_error_set_int(grpc_error *src, grpc_error_ints which,
                                intptr_t value) {
   GPR_TIMER_BEGIN("grpc_error_set_int", 0);
-  grpc_error *new = copy_error_and_unref(src);
-  internal_set_int(&new, which, value);
+  grpc_error *new_err = copy_error_and_unref(src);
+  internal_set_int(&new_err, which, value);
   GPR_TIMER_END("grpc_error_set_int", 0);
-  return new;
+  return new_err;
 }
 
 typedef struct {
@@ -477,10 +477,10 @@ bool grpc_error_get_int(grpc_error *err, grpc_error_ints which, intptr_t *p) {
 grpc_error *grpc_error_set_str(grpc_error *src, grpc_error_strs which,
                                grpc_slice str) {
   GPR_TIMER_BEGIN("grpc_error_set_str", 0);
-  grpc_error *new = copy_error_and_unref(src);
-  internal_set_str(&new, which, str);
+  grpc_error *new_err = copy_error_and_unref(src);
+  internal_set_str(&new_err, which, str);
   GPR_TIMER_END("grpc_error_set_str", 0);
-  return new;
+  return new_err;
 }
 
 bool grpc_error_get_str(grpc_error *err, grpc_error_strs which,
@@ -507,10 +507,10 @@ bool grpc_error_get_str(grpc_error *err, grpc_error_strs which,
 
 grpc_error *grpc_error_add_child(grpc_error *src, grpc_error *child) {
   GPR_TIMER_BEGIN("grpc_error_add_child", 0);
-  grpc_error *new = copy_error_and_unref(src);
-  internal_add_error(&new, child);
+  grpc_error *new_err = copy_error_and_unref(src);
+  internal_add_error(&new_err, child);
   GPR_TIMER_END("grpc_error_add_child", 0);
-  return new;
+  return new_err;
 }
 
 static const char *no_error_string = "\"No Error\"";
@@ -641,7 +641,7 @@ static char *key_time(grpc_error_times which) {
 
 static char *fmt_time(gpr_timespec tm) {
   char *out;
-  char *pfx = "!!";
+  const char *pfx = "!!";
   switch (tm.clock_type) {
     case GPR_CLOCK_MONOTONIC:
       pfx = "@monotonic:";
@@ -733,7 +733,7 @@ const char *grpc_error_string(grpc_error *err) {
   void *p = (void *)gpr_atm_acq_load(&err->atomics.error_string);
   if (p != NULL) {
     GPR_TIMER_END("grpc_error_string", 0);
-    return p;
+    return (const char *)p;
   }
 
   kv_pairs kvs;
diff --git a/src/core/lib/iomgr/ev_epoll1_linux.c b/src/core/lib/iomgr/ev_epoll1_linux.c
index 5bc7e878de..3ac12ab56f 100644
--- a/src/core/lib/iomgr/ev_epoll1_linux.c
+++ b/src/core/lib/iomgr/ev_epoll1_linux.c
@@ -145,7 +145,7 @@ static const char *kick_state_string(kick_state st) {
 }
 
 struct grpc_pollset_worker {
-  kick_state kick_state;
+  kick_state state;
   int kick_state_mutator;  // which line of code last changed kick state
   bool initialized_cv;
   grpc_pollset_worker *next;
@@ -154,24 +154,24 @@ struct grpc_pollset_worker {
   grpc_closure_list schedule_on_end_work;
 };
 
-#define SET_KICK_STATE(worker, state)        \
+#define SET_KICK_STATE(worker, kick_state)   \
   do {                                       \
-    (worker)->kick_state = (state);          \
+    (worker)->state = (kick_state);          \
     (worker)->kick_state_mutator = __LINE__; \
   } while (false)
 
-#define MAX_NEIGHBOURHOODS 1024
+#define MAX_NEIGHBORHOODS 1024
 
-typedef struct pollset_neighbourhood {
+typedef struct pollset_neighborhood {
   gpr_mu mu;
   grpc_pollset *active_root;
   char pad[GPR_CACHELINE_SIZE];
-} pollset_neighbourhood;
+} pollset_neighborhood;
 
 struct grpc_pollset {
   gpr_mu mu;
-  pollset_neighbourhood *neighbourhood;
-  bool reassigning_neighbourhood;
+  pollset_neighborhood *neighborhood;
+  bool reassigning_neighborhood;
   grpc_pollset_worker *root_worker;
   bool kicked_without_poller;
 
@@ -280,8 +280,9 @@ static grpc_fd *fd_create(int fd, const char *name) {
 #endif
   gpr_free(fd_name);
 
-  struct epoll_event ev = {.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET),
-                           .data.ptr = new_fd};
+  struct epoll_event ev;
+  ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
+  ev.data.ptr = new_fd;
   if (epoll_ctl(g_epoll_set.epfd, EPOLL_CTL_ADD, fd, &ev) != 0) {
     gpr_log(GPR_ERROR, "epoll_ctl failed: %s", strerror(errno));
   }
@@ -384,8 +385,8 @@ GPR_TLS_DECL(g_current_thread_worker);
 /* The designated poller */
 static gpr_atm g_active_poller;
 
-static pollset_neighbourhood *g_neighbourhoods;
-static size_t g_num_neighbourhoods;
+static pollset_neighborhood *g_neighborhoods;
+static size_t g_num_neighborhoods;
 
 /* Return true if first in list */
 static bool worker_insert(grpc_pollset *pollset, grpc_pollset_worker *worker) {
@@ -424,8 +425,8 @@ static worker_remove_result worker_remove(grpc_pollset *pollset,
   }
 }
 
-static size_t choose_neighbourhood(void) {
-  return (size_t)gpr_cpu_current_cpu() % g_num_neighbourhoods;
+static size_t choose_neighborhood(void) {
+  return (size_t)gpr_cpu_current_cpu() % g_num_neighborhoods;
 }
 
 static grpc_error *pollset_global_init(void) {
@@ -435,17 +436,18 @@ static grpc_error *pollset_global_init(void) {
   global_wakeup_fd.read_fd = -1;
   grpc_error *err = grpc_wakeup_fd_init(&global_wakeup_fd);
   if (err != GRPC_ERROR_NONE) return err;
-  struct epoll_event ev = {.events = (uint32_t)(EPOLLIN | EPOLLET),
-                           .data.ptr = &global_wakeup_fd};
+  struct epoll_event ev;
+  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
+  ev.data.ptr = &global_wakeup_fd;
   if (epoll_ctl(g_epoll_set.epfd, EPOLL_CTL_ADD, global_wakeup_fd.read_fd,
                 &ev) != 0) {
     return GRPC_OS_ERROR(errno, "epoll_ctl");
   }
-  g_num_neighbourhoods = GPR_CLAMP(gpr_cpu_num_cores(), 1, MAX_NEIGHBOURHOODS);
-  g_neighbourhoods = (pollset_neighbourhood *)gpr_zalloc(
-      sizeof(*g_neighbourhoods) * g_num_neighbourhoods);
-  for (size_t i = 0; i < g_num_neighbourhoods; i++) {
-    gpr_mu_init(&g_neighbourhoods[i].mu);
+  g_num_neighborhoods = GPR_CLAMP(gpr_cpu_num_cores(), 1, MAX_NEIGHBORHOODS);
+  g_neighborhoods = (pollset_neighborhood *)gpr_zalloc(
+      sizeof(*g_neighborhoods) * g_num_neighborhoods);
+  for (size_t i = 0; i < g_num_neighborhoods; i++) {
+    gpr_mu_init(&g_neighborhoods[i].mu);
   }
   return GRPC_ERROR_NONE;
 }
@@ -454,17 +456,17 @@ static void pollset_global_shutdown(void) {
   gpr_tls_destroy(&g_current_thread_pollset);
   gpr_tls_destroy(&g_current_thread_worker);
   if (global_wakeup_fd.read_fd != -1) grpc_wakeup_fd_destroy(&global_wakeup_fd);
-  for (size_t i = 0; i < g_num_neighbourhoods; i++) {
-    gpr_mu_destroy(&g_neighbourhoods[i].mu);
+  for (size_t i = 0; i < g_num_neighborhoods; i++) {
+    gpr_mu_destroy(&g_neighborhoods[i].mu);
   }
-  gpr_free(g_neighbourhoods);
+  gpr_free(g_neighborhoods);
 }
 
 static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
   gpr_mu_init(&pollset->mu);
   *mu = &pollset->mu;
-  pollset->neighbourhood = &g_neighbourhoods[choose_neighbourhood()];
-  pollset->reassigning_neighbourhood = false;
+  pollset->neighborhood = &g_neighborhoods[choose_neighborhood()];
+  pollset->reassigning_neighborhood = false;
   pollset->root_worker = NULL;
   pollset->kicked_without_poller = false;
   pollset->seen_inactive = true;
@@ -477,47 +479,52 @@ static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
 static void pollset_destroy(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
   gpr_mu_lock(&pollset->mu);
   if (!pollset->seen_inactive) {
-    pollset_neighbourhood *neighbourhood = pollset->neighbourhood;
+    pollset_neighborhood *neighborhood = pollset->neighborhood;
     gpr_mu_unlock(&pollset->mu);
-  retry_lock_neighbourhood:
-    gpr_mu_lock(&neighbourhood->mu);
+  retry_lock_neighborhood:
+    gpr_mu_lock(&neighborhood->mu);
     gpr_mu_lock(&pollset->mu);
     if (!pollset->seen_inactive) {
-      if (pollset->neighbourhood != neighbourhood) {
-        gpr_mu_unlock(&neighbourhood->mu);
-        neighbourhood = pollset->neighbourhood;
+      if (pollset->neighborhood != neighborhood) {
+        gpr_mu_unlock(&neighborhood->mu);
+        neighborhood = pollset->neighborhood;
         gpr_mu_unlock(&pollset->mu);
-        goto retry_lock_neighbourhood;
+        goto retry_lock_neighborhood;
       }
       pollset->prev->next = pollset->next;
       pollset->next->prev = pollset->prev;
-      if (pollset == pollset->neighbourhood->active_root) {
-        pollset->neighbourhood->active_root =
+      if (pollset == pollset->neighborhood->active_root) {
+        pollset->neighborhood->active_root =
             pollset->next == pollset ? NULL : pollset->next;
       }
     }
-    gpr_mu_unlock(&pollset->neighbourhood->mu);
+    gpr_mu_unlock(&pollset->neighborhood->mu);
   }
   gpr_mu_unlock(&pollset->mu);
   gpr_mu_destroy(&pollset->mu);
 }
 
-static grpc_error *pollset_kick_all(grpc_pollset *pollset) {
+static grpc_error *pollset_kick_all(grpc_exec_ctx *exec_ctx,
+                                    grpc_pollset *pollset) {
   GPR_TIMER_BEGIN("pollset_kick_all", 0);
   grpc_error *error = GRPC_ERROR_NONE;
   if (pollset->root_worker != NULL) {
     grpc_pollset_worker *worker = pollset->root_worker;
     do {
-      switch (worker->kick_state) {
+      GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
+      switch (worker->state) {
         case KICKED:
+          GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
           break;
         case UNKICKED:
           SET_KICK_STATE(worker, KICKED);
           if (worker->initialized_cv) {
+            GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
             gpr_cv_signal(&worker->cv);
           }
           break;
         case DESIGNATED_POLLER:
+          GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx);
           SET_KICK_STATE(worker, KICKED);
           append_error(&error, grpc_wakeup_fd_wakeup(&global_wakeup_fd),
                        "pollset_kick_all");
@@ -550,7 +557,7 @@ static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   GPR_ASSERT(!pollset->shutting_down);
   pollset->shutdown_closure = closure;
   pollset->shutting_down = true;
-  GRPC_LOG_IF_ERROR("pollset_shutdown", pollset_kick_all(pollset));
+  GRPC_LOG_IF_ERROR("pollset_shutdown", pollset_kick_all(exec_ctx, pollset));
   pollset_maybe_finish_shutdown(exec_ctx, pollset);
   GPR_TIMER_END("pollset_shutdown", 0);
 }
@@ -567,7 +574,10 @@ static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
   }
 
   static const gpr_timespec round_up = {
-      .clock_type = GPR_TIMESPAN, .tv_sec = 0, .tv_nsec = GPR_NS_PER_MS - 1};
+      0,                 /* tv_sec */
+      GPR_NS_PER_MS - 1, /* tv_nsec */
+      GPR_TIMESPAN       /* clock_type */
+  };
   timeout = gpr_time_sub(deadline, now);
   int millis = gpr_time_to_millis(gpr_time_add(timeout, round_up));
   return millis >= 1 ? millis : 1;
@@ -646,6 +656,8 @@ static grpc_error *do_epoll_wait(grpc_exec_ctx *exec_ctx, grpc_pollset *ps,
 
   if (r < 0) return GRPC_OS_ERROR(errno, "epoll_wait");
 
+  GRPC_STATS_INC_POLL_EVENTS_RETURNED(exec_ctx, r);
+
   if (GRPC_TRACER_ON(grpc_polling_trace)) {
     gpr_log(GPR_DEBUG, "ps: %p poll got %d events", ps, r);
   }
@@ -675,77 +687,77 @@ static bool begin_worker(grpc_pollset *pollset, grpc_pollset_worker *worker,
     // pollset has been observed to be inactive, we need to move back to the
     // active list
     bool is_reassigning = false;
-    if (!pollset->reassigning_neighbourhood) {
+    if (!pollset->reassigning_neighborhood) {
       is_reassigning = true;
-      pollset->reassigning_neighbourhood = true;
-      pollset->neighbourhood = &g_neighbourhoods[choose_neighbourhood()];
+      pollset->reassigning_neighborhood = true;
+      pollset->neighborhood = &g_neighborhoods[choose_neighborhood()];
     }
-    pollset_neighbourhood *neighbourhood = pollset->neighbourhood;
+    pollset_neighborhood *neighborhood = pollset->neighborhood;
     gpr_mu_unlock(&pollset->mu);
   // pollset unlocked: state may change (even worker->kick_state)
-  retry_lock_neighbourhood:
-    gpr_mu_lock(&neighbourhood->mu);
+  retry_lock_neighborhood:
+    gpr_mu_lock(&neighborhood->mu);
     gpr_mu_lock(&pollset->mu);
     if (GRPC_TRACER_ON(grpc_polling_trace)) {
       gpr_log(GPR_ERROR, "PS:%p BEGIN_REORG:%p kick_state=%s is_reassigning=%d",
-              pollset, worker, kick_state_string(worker->kick_state),
+              pollset, worker, kick_state_string(worker->state),
               is_reassigning);
     }
     if (pollset->seen_inactive) {
-      if (neighbourhood != pollset->neighbourhood) {
-        gpr_mu_unlock(&neighbourhood->mu);
-        neighbourhood = pollset->neighbourhood;
+      if (neighborhood != pollset->neighborhood) {
+        gpr_mu_unlock(&neighborhood->mu);
+        neighborhood = pollset->neighborhood;
         gpr_mu_unlock(&pollset->mu);
-        goto retry_lock_neighbourhood;
+        goto retry_lock_neighborhood;
       }
 
       /* In the brief time we released the pollset locks above, the worker MAY
          have been kicked. In this case, the worker should get out of this
          pollset ASAP and hence this should neither add the pollset to
-         neighbourhood nor mark the pollset as active.
+         neighborhood nor mark the pollset as active.
 
          On a side note, the only way a worker's kick state could have changed
          at this point is if it were "kicked specifically". Since the worker has
          not added itself to the pollset yet (by calling worker_insert()), it is
          not visible in the "kick any" path yet */
-      if (worker->kick_state == UNKICKED) {
+      if (worker->state == UNKICKED) {
         pollset->seen_inactive = false;
-        if (neighbourhood->active_root == NULL) {
-          neighbourhood->active_root = pollset->next = pollset->prev = pollset;
+        if (neighborhood->active_root == NULL) {
+          neighborhood->active_root = pollset->next = pollset->prev = pollset;
           /* Make this the designated poller if there isn't one already */
-          if (worker->kick_state == UNKICKED &&
+          if (worker->state == UNKICKED &&
               gpr_atm_no_barrier_cas(&g_active_poller, 0, (gpr_atm)worker)) {
             SET_KICK_STATE(worker, DESIGNATED_POLLER);
           }
         } else {
-          pollset->next = neighbourhood->active_root;
+          pollset->next = neighborhood->active_root;
           pollset->prev = pollset->next->prev;
           pollset->next->prev = pollset->prev->next = pollset;
         }
       }
     }
     if (is_reassigning) {
-      GPR_ASSERT(pollset->reassigning_neighbourhood);
-      pollset->reassigning_neighbourhood = false;
+      GPR_ASSERT(pollset->reassigning_neighborhood);
+      pollset->reassigning_neighborhood = false;
     }
-    gpr_mu_unlock(&neighbourhood->mu);
+    gpr_mu_unlock(&neighborhood->mu);
   }
 
   worker_insert(pollset, worker);
   pollset->begin_refs--;
-  if (worker->kick_state == UNKICKED && !pollset->kicked_without_poller) {
+  if (worker->state == UNKICKED && !pollset->kicked_without_poller) {
     GPR_ASSERT(gpr_atm_no_barrier_load(&g_active_poller) != (gpr_atm)worker);
     worker->initialized_cv = true;
     gpr_cv_init(&worker->cv);
-    while (worker->kick_state == UNKICKED && !pollset->shutting_down) {
+    while (worker->state == UNKICKED && !pollset->shutting_down) {
       if (GRPC_TRACER_ON(grpc_polling_trace)) {
         gpr_log(GPR_ERROR, "PS:%p BEGIN_WAIT:%p kick_state=%s shutdown=%d",
-                pollset, worker, kick_state_string(worker->kick_state),
+                pollset, worker, kick_state_string(worker->state),
                 pollset->shutting_down);
       }
 
       if (gpr_cv_wait(&worker->cv, &pollset->mu, deadline) &&
-          worker->kick_state == UNKICKED) {
+          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);
@@ -758,12 +770,12 @@ static bool begin_worker(grpc_pollset *pollset, grpc_pollset_worker *worker,
     gpr_log(GPR_ERROR,
             "PS:%p BEGIN_DONE:%p kick_state=%s shutdown=%d "
             "kicked_without_poller: %d",
-            pollset, worker, kick_state_string(worker->kick_state),
+            pollset, worker, kick_state_string(worker->state),
             pollset->shutting_down, pollset->kicked_without_poller);
   }
 
   /* We release pollset lock in this function at a couple of places:
-   *   1. Briefly when assigning pollset to a neighbourhood
+   *   1. Briefly when assigning pollset to a neighborhood
    *   2. When doing gpr_cv_wait()
    * It is possible that 'kicked_without_poller' was set to true during (1) and
    * 'shutting_down' is set to true during (1) or (2). If either of them is
@@ -778,15 +790,15 @@ static bool begin_worker(grpc_pollset *pollset, grpc_pollset_worker *worker,
   }
 
   GPR_TIMER_END("begin_worker", 0);
-  return worker->kick_state == DESIGNATED_POLLER && !pollset->shutting_down;
+  return worker->state == DESIGNATED_POLLER && !pollset->shutting_down;
 }
 
-static bool check_neighbourhood_for_available_poller(
-    pollset_neighbourhood *neighbourhood) {
-  GPR_TIMER_BEGIN("check_neighbourhood_for_available_poller", 0);
+static bool check_neighborhood_for_available_poller(
+    grpc_exec_ctx *exec_ctx, pollset_neighborhood *neighborhood) {
+  GPR_TIMER_BEGIN("check_neighborhood_for_available_poller", 0);
   bool found_worker = false;
   do {
-    grpc_pollset *inspect = neighbourhood->active_root;
+    grpc_pollset *inspect = neighborhood->active_root;
     if (inspect == NULL) {
       break;
     }
@@ -795,7 +807,7 @@ static bool check_neighbourhood_for_available_poller(
     grpc_pollset_worker *inspect_worker = inspect->root_worker;
     if (inspect_worker != NULL) {
       do {
-        switch (inspect_worker->kick_state) {
+        switch (inspect_worker->state) {
           case UNKICKED:
             if (gpr_atm_no_barrier_cas(&g_active_poller, 0,
                                        (gpr_atm)inspect_worker)) {
@@ -806,6 +818,7 @@ static bool check_neighbourhood_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);
                 gpr_cv_signal(&inspect_worker->cv);
               }
             } else {
@@ -831,8 +844,8 @@ static bool check_neighbourhood_for_available_poller(
         gpr_log(GPR_DEBUG, " .. mark pollset %p inactive", inspect);
       }
       inspect->seen_inactive = true;
-      if (inspect == neighbourhood->active_root) {
-        neighbourhood->active_root =
+      if (inspect == neighborhood->active_root) {
+        neighborhood->active_root =
             inspect->next == inspect ? NULL : inspect->next;
       }
       inspect->next->prev = inspect->prev;
@@ -841,7 +854,7 @@ static bool check_neighbourhood_for_available_poller(
     }
     gpr_mu_unlock(&inspect->mu);
   } while (!found_worker);
-  GPR_TIMER_END("check_neighbourhood_for_available_poller", 0);
+  GPR_TIMER_END("check_neighborhood_for_available_poller", 0);
   return found_worker;
 }
 
@@ -858,13 +871,14 @@ static void end_worker(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   grpc_closure_list_move(&worker->schedule_on_end_work,
                          &exec_ctx->closure_list);
   if (gpr_atm_no_barrier_load(&g_active_poller) == (gpr_atm)worker) {
-    if (worker->next != worker && worker->next->kick_state == UNKICKED) {
+    if (worker->next != worker && worker->next->state == UNKICKED) {
       if (GRPC_TRACER_ON(grpc_polling_trace)) {
         gpr_log(GPR_DEBUG, " .. choose next poller to be peer %p", worker);
       }
       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);
       gpr_cv_signal(&worker->next->cv);
       if (grpc_exec_ctx_has_work(exec_ctx)) {
         gpr_mu_unlock(&pollset->mu);
@@ -873,32 +887,33 @@ static void end_worker(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
       }
     } else {
       gpr_atm_no_barrier_store(&g_active_poller, 0);
-      size_t poller_neighbourhood_idx =
-          (size_t)(pollset->neighbourhood - g_neighbourhoods);
+      size_t poller_neighborhood_idx =
+          (size_t)(pollset->neighborhood - g_neighborhoods);
       gpr_mu_unlock(&pollset->mu);
       bool found_worker = false;
-      bool scan_state[MAX_NEIGHBOURHOODS];
-      for (size_t i = 0; !found_worker && i < g_num_neighbourhoods; i++) {
-        pollset_neighbourhood *neighbourhood =
-            &g_neighbourhoods[(poller_neighbourhood_idx + i) %
-                              g_num_neighbourhoods];
-        if (gpr_mu_trylock(&neighbourhood->mu)) {
+      bool scan_state[MAX_NEIGHBORHOODS];
+      for (size_t i = 0; !found_worker && i < g_num_neighborhoods; i++) {
+        pollset_neighborhood *neighborhood =
+            &g_neighborhoods[(poller_neighborhood_idx + i) %
+                             g_num_neighborhoods];
+        if (gpr_mu_trylock(&neighborhood->mu)) {
           found_worker =
-              check_neighbourhood_for_available_poller(neighbourhood);
-          gpr_mu_unlock(&neighbourhood->mu);
+              check_neighborhood_for_available_poller(exec_ctx, neighborhood);
+          gpr_mu_unlock(&neighborhood->mu);
           scan_state[i] = true;
         } else {
           scan_state[i] = false;
         }
       }
-      for (size_t i = 0; !found_worker && i < g_num_neighbourhoods; i++) {
+      for (size_t i = 0; !found_worker && i < g_num_neighborhoods; i++) {
         if (scan_state[i]) continue;
-        pollset_neighbourhood *neighbourhood =
-            &g_neighbourhoods[(poller_neighbourhood_idx + i) %
-                              g_num_neighbourhoods];
-        gpr_mu_lock(&neighbourhood->mu);
-        found_worker = check_neighbourhood_for_available_poller(neighbourhood);
-        gpr_mu_unlock(&neighbourhood->mu);
+        pollset_neighborhood *neighborhood =
+            &g_neighborhoods[(poller_neighborhood_idx + i) %
+                             g_num_neighborhoods];
+        gpr_mu_lock(&neighborhood->mu);
+        found_worker =
+            check_neighborhood_for_available_poller(exec_ctx, neighborhood);
+        gpr_mu_unlock(&neighborhood->mu);
       }
       grpc_exec_ctx_flush(exec_ctx);
       gpr_mu_lock(&pollset->mu);
@@ -979,9 +994,10 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *ps,
   return error;
 }
 
-static grpc_error *pollset_kick(grpc_pollset *pollset,
+static grpc_error *pollset_kick(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                                 grpc_pollset_worker *specific_worker) {
   GPR_TIMER_BEGIN("pollset_kick", 0);
+  GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
   grpc_error *ret_err = GRPC_ERROR_NONE;
   if (GRPC_TRACER_ON(grpc_polling_trace)) {
     gpr_strvec log;
@@ -994,14 +1010,14 @@ static grpc_error *pollset_kick(grpc_pollset *pollset,
     gpr_strvec_add(&log, tmp);
     if (pollset->root_worker != NULL) {
       gpr_asprintf(&tmp, " {kick_state=%s next=%p {kick_state=%s}}",
-                   kick_state_string(pollset->root_worker->kick_state),
+                   kick_state_string(pollset->root_worker->state),
                    pollset->root_worker->next,
-                   kick_state_string(pollset->root_worker->next->kick_state));
+                   kick_state_string(pollset->root_worker->next->state));
       gpr_strvec_add(&log, tmp);
     }
     if (specific_worker != NULL) {
       gpr_asprintf(&tmp, " worker_kick_state=%s",
-                   kick_state_string(specific_worker->kick_state));
+                   kick_state_string(specific_worker->state));
       gpr_strvec_add(&log, tmp);
     }
     tmp = gpr_strvec_flatten(&log, NULL);
@@ -1014,6 +1030,7 @@ static grpc_error *pollset_kick(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 == NULL) {
+        GRPC_STATS_INC_POLLSET_KICKED_WITHOUT_POLLER(exec_ctx);
         pollset->kicked_without_poller = true;
         if (GRPC_TRACER_ON(grpc_polling_trace)) {
           gpr_log(GPR_ERROR, " .. kicked_without_poller");
@@ -1021,13 +1038,15 @@ static grpc_error *pollset_kick(grpc_pollset *pollset,
         goto done;
       }
       grpc_pollset_worker *next_worker = root_worker->next;
-      if (root_worker->kick_state == KICKED) {
+      if (root_worker->state == KICKED) {
+        GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
         if (GRPC_TRACER_ON(grpc_polling_trace)) {
           gpr_log(GPR_ERROR, " .. already kicked %p", root_worker);
         }
         SET_KICK_STATE(root_worker, KICKED);
         goto done;
-      } else if (next_worker->kick_state == KICKED) {
+      } else if (next_worker->state == KICKED) {
+        GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
         if (GRPC_TRACER_ON(grpc_polling_trace)) {
           gpr_log(GPR_ERROR, " .. already kicked %p", next_worker);
         }
@@ -1038,13 +1057,15 @@ static grpc_error *pollset_kick(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);
         if (GRPC_TRACER_ON(grpc_polling_trace)) {
           gpr_log(GPR_ERROR, " .. kicked %p", root_worker);
         }
         SET_KICK_STATE(root_worker, KICKED);
         ret_err = grpc_wakeup_fd_wakeup(&global_wakeup_fd);
         goto done;
-      } else if (next_worker->kick_state == UNKICKED) {
+      } else if (next_worker->state == UNKICKED) {
+        GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
         if (GRPC_TRACER_ON(grpc_polling_trace)) {
           gpr_log(GPR_ERROR, " .. kicked %p", next_worker);
         }
@@ -1052,8 +1073,8 @@ static grpc_error *pollset_kick(grpc_pollset *pollset,
         SET_KICK_STATE(next_worker, KICKED);
         gpr_cv_signal(&next_worker->cv);
         goto done;
-      } else if (next_worker->kick_state == DESIGNATED_POLLER) {
-        if (root_worker->kick_state != DESIGNATED_POLLER) {
+      } else if (next_worker->state == DESIGNATED_POLLER) {
+        if (root_worker->state != DESIGNATED_POLLER) {
           if (GRPC_TRACER_ON(grpc_polling_trace)) {
             gpr_log(
                 GPR_ERROR,
@@ -1062,10 +1083,12 @@ static grpc_error *pollset_kick(grpc_pollset *pollset,
           }
           SET_KICK_STATE(root_worker, KICKED);
           if (root_worker->initialized_cv) {
+            GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
             gpr_cv_signal(&root_worker->cv);
           }
           goto done;
         } else {
+          GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx);
           if (GRPC_TRACER_ON(grpc_polling_trace)) {
             gpr_log(GPR_ERROR, " .. non-root poller %p (root=%p)", next_worker,
                     root_worker);
@@ -1075,11 +1098,13 @@ static grpc_error *pollset_kick(grpc_pollset *pollset,
           goto done;
         }
       } else {
-        GPR_ASSERT(next_worker->kick_state == KICKED);
+        GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
+        GPR_ASSERT(next_worker->state == KICKED);
         SET_KICK_STATE(next_worker, KICKED);
         goto done;
       }
     } else {
+      GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD(exec_ctx);
       if (GRPC_TRACER_ON(grpc_polling_trace)) {
         gpr_log(GPR_ERROR, " .. kicked while waking up");
       }
@@ -1089,13 +1114,14 @@ static grpc_error *pollset_kick(grpc_pollset *pollset,
     GPR_UNREACHABLE_CODE(goto done);
   }
 
-  if (specific_worker->kick_state == KICKED) {
+  if (specific_worker->state == KICKED) {
     if (GRPC_TRACER_ON(grpc_polling_trace)) {
       gpr_log(GPR_ERROR, " .. specific worker already kicked");
     }
     goto done;
   } else if (gpr_tls_get(&g_current_thread_worker) ==
              (intptr_t)specific_worker) {
+    GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD(exec_ctx);
     if (GRPC_TRACER_ON(grpc_polling_trace)) {
       gpr_log(GPR_ERROR, " .. mark %p kicked", specific_worker);
     }
@@ -1103,6 +1129,7 @@ static grpc_error *pollset_kick(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);
     if (GRPC_TRACER_ON(grpc_polling_trace)) {
       gpr_log(GPR_ERROR, " .. kick active poller");
     }
@@ -1110,6 +1137,7 @@ static grpc_error *pollset_kick(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);
     if (GRPC_TRACER_ON(grpc_polling_trace)) {
       gpr_log(GPR_ERROR, " .. kick waiting worker");
     }
@@ -1117,6 +1145,7 @@ static grpc_error *pollset_kick(grpc_pollset *pollset,
     gpr_cv_signal(&specific_worker->cv);
     goto done;
   } else {
+    GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
     if (GRPC_TRACER_ON(grpc_polling_trace)) {
       gpr_log(GPR_ERROR, " .. kick non-waiting worker");
     }
@@ -1173,34 +1202,34 @@ static void shutdown_engine(void) {
 }
 
 static const grpc_event_engine_vtable vtable = {
-    .pollset_size = sizeof(grpc_pollset),
-
-    .fd_create = fd_create,
-    .fd_wrapped_fd = fd_wrapped_fd,
-    .fd_orphan = fd_orphan,
-    .fd_shutdown = fd_shutdown,
-    .fd_is_shutdown = fd_is_shutdown,
-    .fd_notify_on_read = fd_notify_on_read,
-    .fd_notify_on_write = fd_notify_on_write,
-    .fd_get_read_notifier_pollset = fd_get_read_notifier_pollset,
-
-    .pollset_init = pollset_init,
-    .pollset_shutdown = pollset_shutdown,
-    .pollset_destroy = pollset_destroy,
-    .pollset_work = pollset_work,
-    .pollset_kick = pollset_kick,
-    .pollset_add_fd = pollset_add_fd,
-
-    .pollset_set_create = pollset_set_create,
-    .pollset_set_destroy = pollset_set_destroy,
-    .pollset_set_add_pollset = pollset_set_add_pollset,
-    .pollset_set_del_pollset = pollset_set_del_pollset,
-    .pollset_set_add_pollset_set = pollset_set_add_pollset_set,
-    .pollset_set_del_pollset_set = pollset_set_del_pollset_set,
-    .pollset_set_add_fd = pollset_set_add_fd,
-    .pollset_set_del_fd = pollset_set_del_fd,
-
-    .shutdown_engine = shutdown_engine,
+    sizeof(grpc_pollset),
+
+    fd_create,
+    fd_wrapped_fd,
+    fd_orphan,
+    fd_shutdown,
+    fd_notify_on_read,
+    fd_notify_on_write,
+    fd_is_shutdown,
+    fd_get_read_notifier_pollset,
+
+    pollset_init,
+    pollset_shutdown,
+    pollset_destroy,
+    pollset_work,
+    pollset_kick,
+    pollset_add_fd,
+
+    pollset_set_create,
+    pollset_set_destroy,
+    pollset_set_add_pollset,
+    pollset_set_del_pollset,
+    pollset_set_add_pollset_set,
+    pollset_set_del_pollset_set,
+    pollset_set_add_fd,
+    pollset_set_del_fd,
+
+    shutdown_engine,
 };
 
 /* It is possible that GLIBC has epoll but the underlying kernel doesn't.
diff --git a/src/core/lib/iomgr/ev_epollex_linux.c b/src/core/lib/iomgr/ev_epollex_linux.c
index 277347ac70..8eb4de44d9 100644
--- a/src/core/lib/iomgr/ev_epollex_linux.c
+++ b/src/core/lib/iomgr/ev_epollex_linux.c
@@ -142,7 +142,7 @@ static grpc_error *pollable_materialize(pollable *p);
  */
 
 struct grpc_fd {
-  pollable pollable;
+  pollable pollable_obj;
   int fd;
   /* refst format:
        bit 0    : 1=Active / 0=Orphaned
@@ -193,15 +193,15 @@ struct grpc_pollset_worker {
   pollset_worker_link links[POLLSET_WORKER_LINK_COUNT];
   gpr_cv cv;
   grpc_pollset *pollset;
-  pollable *pollable;
+  pollable *pollable_obj;
 };
 
 #define MAX_EPOLL_EVENTS 100
 #define MAX_EPOLL_EVENTS_HANDLED_EACH_POLL_CALL 5
 
 struct grpc_pollset {
-  pollable pollable;
-  pollable *current_pollable;
+  pollable pollable_obj;
+  pollable *current_pollable_obj;
   int kick_alls_pending;
   bool kicked_without_poller;
   grpc_closure *shutdown_closure;
@@ -282,7 +282,7 @@ static void fd_destroy(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   grpc_fd *fd = (grpc_fd *)arg;
   /* Add the fd to the freelist */
   grpc_iomgr_unregister_object(&fd->iomgr_object);
-  pollable_destroy(&fd->pollable);
+  pollable_destroy(&fd->pollable_obj);
   gpr_mu_destroy(&fd->orphaned_mu);
   gpr_mu_lock(&fd_freelist_mu);
   fd->freelist_next = fd_freelist;
@@ -343,7 +343,7 @@ static grpc_fd *fd_create(int fd, const char *name) {
     new_fd = (grpc_fd *)gpr_malloc(sizeof(grpc_fd));
   }
 
-  pollable_init(&new_fd->pollable, PO_FD);
+  pollable_init(&new_fd->pollable_obj, PO_FD);
 
   gpr_atm_rel_store(&new_fd->refst, (gpr_atm)1);
   new_fd->fd = fd;
@@ -385,7 +385,7 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   bool is_fd_closed = already_closed;
   grpc_error *error = GRPC_ERROR_NONE;
 
-  gpr_mu_lock(&fd->pollable.po.mu);
+  gpr_mu_lock(&fd->pollable_obj.po.mu);
   gpr_mu_lock(&fd->orphaned_mu);
   fd->on_done_closure = on_done;
 
@@ -411,7 +411,7 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   GRPC_CLOSURE_SCHED(exec_ctx, fd->on_done_closure, GRPC_ERROR_REF(error));
 
   gpr_mu_unlock(&fd->orphaned_mu);
-  gpr_mu_unlock(&fd->pollable.po.mu);
+  gpr_mu_unlock(&fd->pollable_obj.po.mu);
   UNREF_BY(exec_ctx, fd, 2, reason); /* Drop the reference */
   GRPC_LOG_IF_ERROR("fd_orphan", GRPC_ERROR_REF(error));
   GRPC_ERROR_UNREF(error);
@@ -477,8 +477,9 @@ static grpc_error *pollable_materialize(pollable *p) {
       close(new_epfd);
       return err;
     }
-    struct epoll_event ev = {.events = (uint32_t)(EPOLLIN | EPOLLET),
-                             .data.ptr = (void *)(1 | (intptr_t)&p->wakeup)};
+    struct epoll_event ev;
+    ev.events = (uint32_t)(EPOLLIN | EPOLLET);
+    ev.data.ptr = (void *)(1 | (intptr_t)&p->wakeup);
     if (epoll_ctl(new_epfd, EPOLL_CTL_ADD, p->wakeup.read_fd, &ev) != 0) {
       err = GRPC_OS_ERROR(errno, "epoll_ctl");
       close(new_epfd);
@@ -507,9 +508,9 @@ static grpc_error *pollable_add_fd(pollable *p, grpc_fd *fd) {
     gpr_mu_unlock(&fd->orphaned_mu);
     return GRPC_ERROR_NONE;
   }
-  struct epoll_event ev_fd = {
-      .events = (uint32_t)(EPOLLET | EPOLLIN | EPOLLOUT | EPOLLEXCLUSIVE),
-      .data.ptr = fd};
+  struct epoll_event ev_fd;
+  ev_fd.events = (uint32_t)(EPOLLET | EPOLLIN | EPOLLOUT | EPOLLEXCLUSIVE);
+  ev_fd.data.ptr = fd;
   if (epoll_ctl(epfd, EPOLL_CTL_ADD, fd->fd, &ev_fd) != 0) {
     switch (errno) {
       case EEXIST:
@@ -557,30 +558,34 @@ static void do_kick_all(grpc_exec_ctx *exec_ctx, void *arg,
                         grpc_error *error_unused) {
   grpc_error *error = GRPC_ERROR_NONE;
   grpc_pollset *pollset = (grpc_pollset *)arg;
-  gpr_mu_lock(&pollset->pollable.po.mu);
+  gpr_mu_lock(&pollset->pollable_obj.po.mu);
   if (pollset->root_worker != NULL) {
     grpc_pollset_worker *worker = pollset->root_worker;
     do {
-      if (worker->pollable != &pollset->pollable) {
-        gpr_mu_lock(&worker->pollable->po.mu);
+      GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
+      if (worker->pollable_obj != &pollset->pollable_obj) {
+        gpr_mu_lock(&worker->pollable_obj->po.mu);
       }
       if (worker->initialized_cv && worker != pollset->root_worker) {
         if (GRPC_TRACER_ON(grpc_polling_trace)) {
           gpr_log(GPR_DEBUG, "PS:%p kickall_via_cv %p (pollable %p vs %p)",
-                  pollset, worker, &pollset->pollable, worker->pollable);
+                  pollset, worker, &pollset->pollable_obj,
+                  worker->pollable_obj);
         }
         worker->kicked = true;
         gpr_cv_signal(&worker->cv);
       } else {
         if (GRPC_TRACER_ON(grpc_polling_trace)) {
           gpr_log(GPR_DEBUG, "PS:%p kickall_via_wakeup %p (pollable %p vs %p)",
-                  pollset, worker, &pollset->pollable, worker->pollable);
+                  pollset, worker, &pollset->pollable_obj,
+                  worker->pollable_obj);
         }
-        append_error(&error, grpc_wakeup_fd_wakeup(&worker->pollable->wakeup),
+        append_error(&error,
+                     grpc_wakeup_fd_wakeup(&worker->pollable_obj->wakeup),
                      "pollset_shutdown");
       }
-      if (worker->pollable != &pollset->pollable) {
-        gpr_mu_unlock(&worker->pollable->po.mu);
+      if (worker->pollable_obj != &pollset->pollable_obj) {
+        gpr_mu_unlock(&worker->pollable_obj->po.mu);
       }
 
       worker = worker->links[PWL_POLLSET].next;
@@ -588,7 +593,7 @@ static void do_kick_all(grpc_exec_ctx *exec_ctx, void *arg,
   }
   pollset->kick_alls_pending--;
   pollset_maybe_finish_shutdown(exec_ctx, pollset);
-  gpr_mu_unlock(&pollset->pollable.po.mu);
+  gpr_mu_unlock(&pollset->pollable_obj.po.mu);
   GRPC_LOG_IF_ERROR("kick_all", error);
 }
 
@@ -662,26 +667,27 @@ static grpc_error *pollset_kick_inner(grpc_pollset *pollset, pollable *p,
 }
 
 /* p->po.mu must be held before calling this function */
-static grpc_error *pollset_kick(grpc_pollset *pollset,
+static grpc_error *pollset_kick(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                                 grpc_pollset_worker *specific_worker) {
-  pollable *p = pollset->current_pollable;
-  if (p != &pollset->pollable) {
+  pollable *p = pollset->current_pollable_obj;
+  GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
+  if (p != &pollset->pollable_obj) {
     gpr_mu_lock(&p->po.mu);
   }
   grpc_error *error = pollset_kick_inner(pollset, p, specific_worker);
-  if (p != &pollset->pollable) {
+  if (p != &pollset->pollable_obj) {
     gpr_mu_unlock(&p->po.mu);
   }
   return error;
 }
 
 static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
-  pollable_init(&pollset->pollable, PO_POLLSET);
-  pollset->current_pollable = &g_empty_pollable;
+  pollable_init(&pollset->pollable_obj, PO_POLLSET);
+  pollset->current_pollable_obj = &g_empty_pollable;
   pollset->kicked_without_poller = false;
   pollset->shutdown_closure = NULL;
   pollset->root_worker = NULL;
-  *mu = &pollset->pollable.po.mu;
+  *mu = &pollset->pollable_obj.po.mu;
 }
 
 /* Convert a timespec to milliseconds:
@@ -703,7 +709,10 @@ static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
   }
 
   static const gpr_timespec round_up = {
-      .clock_type = GPR_TIMESPAN, .tv_sec = 0, .tv_nsec = GPR_NS_PER_MS - 1};
+      0,                 /* tv_sec */
+      GPR_NS_PER_MS - 1, /* tv_nsec */
+      GPR_TIMESPAN       /* clock_type */
+  };
   timeout = gpr_time_sub(deadline, now);
   int millis = gpr_time_to_millis(gpr_time_add(timeout, round_up));
   return millis >= 1 ? millis : 1;
@@ -729,8 +738,8 @@ static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
 static grpc_error *fd_become_pollable_locked(grpc_fd *fd) {
   grpc_error *error = GRPC_ERROR_NONE;
   static const char *err_desc = "fd_become_pollable";
-  if (append_error(&error, pollable_materialize(&fd->pollable), err_desc)) {
-    append_error(&error, pollable_add_fd(&fd->pollable, fd), err_desc);
+  if (append_error(&error, pollable_materialize(&fd->pollable_obj), err_desc)) {
+    append_error(&error, pollable_add_fd(&fd->pollable_obj, fd), err_desc);
   }
   return error;
 }
@@ -745,7 +754,7 @@ static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 }
 
 static bool pollset_is_pollable_fd(grpc_pollset *pollset, pollable *p) {
-  return p != &g_empty_pollable && p != &pollset->pollable;
+  return p != &g_empty_pollable && p != &pollset->pollable_obj;
 }
 
 static grpc_error *pollset_process_events(grpc_exec_ctx *exec_ctx,
@@ -762,8 +771,9 @@ static grpc_error *pollset_process_events(grpc_exec_ctx *exec_ctx,
       if (GRPC_TRACER_ON(grpc_polling_trace)) {
         gpr_log(GPR_DEBUG, "PS:%p got pollset_wakeup %p", pollset, data_ptr);
       }
-      append_error(&error, grpc_wakeup_fd_consume_wakeup(
-                               (void *)((~(intptr_t)1) & (intptr_t)data_ptr)),
+      append_error(&error,
+                   grpc_wakeup_fd_consume_wakeup(
+                       (grpc_wakeup_fd *)((~(intptr_t)1) & (intptr_t)data_ptr)),
                    err_desc);
     } else {
       grpc_fd *fd = (grpc_fd *)data_ptr;
@@ -790,9 +800,9 @@ static grpc_error *pollset_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) {
-  pollable_destroy(&pollset->pollable);
-  if (pollset_is_pollable_fd(pollset, pollset->current_pollable)) {
-    UNREF_BY(exec_ctx, (grpc_fd *)pollset->current_pollable, 2,
+  pollable_destroy(&pollset->pollable_obj);
+  if (pollset_is_pollable_fd(pollset, pollset->current_pollable_obj)) {
+    UNREF_BY(exec_ctx, (grpc_fd *)pollset->current_pollable_obj, 2,
              "pollset_pollable");
   }
   GRPC_LOG_IF_ERROR("pollset_process_events",
@@ -882,68 +892,69 @@ static bool begin_worker(grpc_pollset *pollset, grpc_pollset_worker *worker,
   worker->initialized_cv = false;
   worker->kicked = false;
   worker->pollset = pollset;
-  worker->pollable = pollset->current_pollable;
+  worker->pollable_obj = pollset->current_pollable_obj;
 
-  if (pollset_is_pollable_fd(pollset, worker->pollable)) {
-    REF_BY((grpc_fd *)worker->pollable, 2, "one_poll");
+  if (pollset_is_pollable_fd(pollset, worker->pollable_obj)) {
+    REF_BY((grpc_fd *)worker->pollable_obj, 2, "one_poll");
   }
 
   worker_insert(&pollset->root_worker, PWL_POLLSET, worker);
-  if (!worker_insert(&worker->pollable->root_worker, PWL_POLLABLE, worker)) {
+  if (!worker_insert(&worker->pollable_obj->root_worker, PWL_POLLABLE,
+                     worker)) {
     worker->initialized_cv = true;
     gpr_cv_init(&worker->cv);
-    if (worker->pollable != &pollset->pollable) {
-      gpr_mu_unlock(&pollset->pollable.po.mu);
+    if (worker->pollable_obj != &pollset->pollable_obj) {
+      gpr_mu_unlock(&pollset->pollable_obj.po.mu);
     }
     if (GRPC_TRACER_ON(grpc_polling_trace) &&
-        worker->pollable->root_worker != worker) {
+        worker->pollable_obj->root_worker != worker) {
       gpr_log(GPR_DEBUG, "PS:%p wait %p w=%p for %dms", pollset,
-              worker->pollable, worker,
+              worker->pollable_obj, worker,
               poll_deadline_to_millis_timeout(deadline, *now));
     }
-    while (do_poll && worker->pollable->root_worker != worker) {
-      if (gpr_cv_wait(&worker->cv, &worker->pollable->po.mu, deadline)) {
+    while (do_poll && worker->pollable_obj->root_worker != worker) {
+      if (gpr_cv_wait(&worker->cv, &worker->pollable_obj->po.mu, deadline)) {
         if (GRPC_TRACER_ON(grpc_polling_trace)) {
           gpr_log(GPR_DEBUG, "PS:%p timeout_wait %p w=%p", pollset,
-                  worker->pollable, worker);
+                  worker->pollable_obj, worker);
         }
         do_poll = false;
       } else if (worker->kicked) {
         if (GRPC_TRACER_ON(grpc_polling_trace)) {
-          gpr_log(GPR_DEBUG, "PS:%p wakeup %p w=%p", pollset, worker->pollable,
-                  worker);
+          gpr_log(GPR_DEBUG, "PS:%p wakeup %p w=%p", pollset,
+                  worker->pollable_obj, worker);
         }
         do_poll = false;
       } else if (GRPC_TRACER_ON(grpc_polling_trace) &&
-                 worker->pollable->root_worker != worker) {
+                 worker->pollable_obj->root_worker != worker) {
         gpr_log(GPR_DEBUG, "PS:%p spurious_wakeup %p w=%p", pollset,
-                worker->pollable, worker);
+                worker->pollable_obj, worker);
       }
     }
-    if (worker->pollable != &pollset->pollable) {
-      gpr_mu_unlock(&worker->pollable->po.mu);
-      gpr_mu_lock(&pollset->pollable.po.mu);
-      gpr_mu_lock(&worker->pollable->po.mu);
+    if (worker->pollable_obj != &pollset->pollable_obj) {
+      gpr_mu_unlock(&worker->pollable_obj->po.mu);
+      gpr_mu_lock(&pollset->pollable_obj.po.mu);
+      gpr_mu_lock(&worker->pollable_obj->po.mu);
     }
     *now = gpr_now(now->clock_type);
   }
 
   return do_poll && pollset->shutdown_closure == NULL &&
-         pollset->current_pollable == worker->pollable;
+         pollset->current_pollable_obj == worker->pollable_obj;
 }
 
 static void end_worker(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                        grpc_pollset_worker *worker,
                        grpc_pollset_worker **worker_hdl) {
   if (NEW_ROOT ==
-      worker_remove(&worker->pollable->root_worker, PWL_POLLABLE, worker)) {
-    gpr_cv_signal(&worker->pollable->root_worker->cv);
+      worker_remove(&worker->pollable_obj->root_worker, PWL_POLLABLE, worker)) {
+    gpr_cv_signal(&worker->pollable_obj->root_worker->cv);
   }
   if (worker->initialized_cv) {
     gpr_cv_destroy(&worker->cv);
   }
-  if (pollset_is_pollable_fd(pollset, worker->pollable)) {
-    UNREF_BY(exec_ctx, (grpc_fd *)worker->pollable, 2, "one_poll");
+  if (pollset_is_pollable_fd(pollset, worker->pollable_obj)) {
+    UNREF_BY(exec_ctx, (grpc_fd *)worker->pollable_obj, 2, "one_poll");
   }
   if (EMPTIED == worker_remove(&pollset->root_worker, PWL_POLLSET, worker)) {
     pollset_maybe_finish_shutdown(exec_ctx, pollset);
@@ -971,41 +982,41 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     pollset->kicked_without_poller = false;
     return GRPC_ERROR_NONE;
   }
-  if (pollset->current_pollable != &pollset->pollable) {
-    gpr_mu_lock(&pollset->current_pollable->po.mu);
+  if (pollset->current_pollable_obj != &pollset->pollable_obj) {
+    gpr_mu_lock(&pollset->current_pollable_obj->po.mu);
   }
   if (begin_worker(pollset, &worker, worker_hdl, &now, deadline)) {
     gpr_tls_set(&g_current_thread_pollset, (intptr_t)pollset);
     gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
     GPR_ASSERT(!pollset->shutdown_closure);
-    append_error(&error, pollable_materialize(worker.pollable), err_desc);
-    if (worker.pollable != &pollset->pollable) {
-      gpr_mu_unlock(&worker.pollable->po.mu);
+    append_error(&error, pollable_materialize(worker.pollable_obj), err_desc);
+    if (worker.pollable_obj != &pollset->pollable_obj) {
+      gpr_mu_unlock(&worker.pollable_obj->po.mu);
     }
-    gpr_mu_unlock(&pollset->pollable.po.mu);
+    gpr_mu_unlock(&pollset->pollable_obj.po.mu);
     if (pollset->event_cursor == pollset->event_count) {
-      append_error(&error, pollset_epoll(exec_ctx, pollset, worker.pollable,
+      append_error(&error, pollset_epoll(exec_ctx, pollset, worker.pollable_obj,
                                          now, deadline),
                    err_desc);
     }
     append_error(&error, pollset_process_events(exec_ctx, pollset, false),
                  err_desc);
-    gpr_mu_lock(&pollset->pollable.po.mu);
-    if (worker.pollable != &pollset->pollable) {
-      gpr_mu_lock(&worker.pollable->po.mu);
+    gpr_mu_lock(&pollset->pollable_obj.po.mu);
+    if (worker.pollable_obj != &pollset->pollable_obj) {
+      gpr_mu_lock(&worker.pollable_obj->po.mu);
     }
     gpr_tls_set(&g_current_thread_pollset, 0);
     gpr_tls_set(&g_current_thread_worker, 0);
     pollset_maybe_finish_shutdown(exec_ctx, pollset);
   }
   end_worker(exec_ctx, pollset, &worker, worker_hdl);
-  if (worker.pollable != &pollset->pollable) {
-    gpr_mu_unlock(&worker.pollable->po.mu);
+  if (worker.pollable_obj != &pollset->pollable_obj) {
+    gpr_mu_unlock(&worker.pollable_obj->po.mu);
   }
   if (grpc_exec_ctx_has_work(exec_ctx)) {
-    gpr_mu_unlock(&pollset->pollable.po.mu);
+    gpr_mu_unlock(&pollset->pollable_obj.po.mu);
     grpc_exec_ctx_flush(exec_ctx);
-    gpr_mu_lock(&pollset->pollable.po.mu);
+    gpr_mu_lock(&pollset->pollable_obj.po.mu);
   }
   return error;
 }
@@ -1022,7 +1033,7 @@ static grpc_error *pollset_add_fd_locked(grpc_exec_ctx *exec_ctx,
                                          bool fd_locked) {
   static const char *err_desc = "pollset_add_fd";
   grpc_error *error = GRPC_ERROR_NONE;
-  if (pollset->current_pollable == &g_empty_pollable) {
+  if (pollset->current_pollable_obj == &g_empty_pollable) {
     if (GRPC_TRACER_ON(grpc_polling_trace)) {
       gpr_log(GPR_DEBUG,
               "PS:%p add fd %p; transition pollable from empty to fd", pollset,
@@ -1030,19 +1041,19 @@ static grpc_error *pollset_add_fd_locked(grpc_exec_ctx *exec_ctx,
     }
     /* empty pollable --> single fd pollable */
     pollset_kick_all(exec_ctx, pollset);
-    pollset->current_pollable = &fd->pollable;
-    if (!fd_locked) gpr_mu_lock(&fd->pollable.po.mu);
+    pollset->current_pollable_obj = &fd->pollable_obj;
+    if (!fd_locked) gpr_mu_lock(&fd->pollable_obj.po.mu);
     append_error(&error, fd_become_pollable_locked(fd), err_desc);
-    if (!fd_locked) gpr_mu_unlock(&fd->pollable.po.mu);
+    if (!fd_locked) gpr_mu_unlock(&fd->pollable_obj.po.mu);
     REF_BY(fd, 2, "pollset_pollable");
-  } else if (pollset->current_pollable == &pollset->pollable) {
+  } else if (pollset->current_pollable_obj == &pollset->pollable_obj) {
     if (GRPC_TRACER_ON(grpc_polling_trace)) {
       gpr_log(GPR_DEBUG, "PS:%p add fd %p; already multipolling", pollset, fd);
     }
-    append_error(&error, pollable_add_fd(pollset->current_pollable, fd),
+    append_error(&error, pollable_add_fd(pollset->current_pollable_obj, fd),
                  err_desc);
-  } else if (pollset->current_pollable != &fd->pollable) {
-    grpc_fd *had_fd = (grpc_fd *)pollset->current_pollable;
+  } else if (pollset->current_pollable_obj != &fd->pollable_obj) {
+    grpc_fd *had_fd = (grpc_fd *)pollset->current_pollable_obj;
     if (GRPC_TRACER_ON(grpc_polling_trace)) {
       gpr_log(GPR_DEBUG,
               "PS:%p add fd %p; transition pollable from fd %p to multipoller",
@@ -1054,11 +1065,11 @@ static grpc_error *pollset_add_fd_locked(grpc_exec_ctx *exec_ctx,
     grpc_lfev_set_ready(exec_ctx, &had_fd->read_closure, "read");
     grpc_lfev_set_ready(exec_ctx, &had_fd->write_closure, "write");
     pollset_kick_all(exec_ctx, pollset);
-    pollset->current_pollable = &pollset->pollable;
-    if (append_error(&error, pollable_materialize(&pollset->pollable),
+    pollset->current_pollable_obj = &pollset->pollable_obj;
+    if (append_error(&error, pollable_materialize(&pollset->pollable_obj),
                      err_desc)) {
-      pollable_add_fd(&pollset->pollable, had_fd);
-      pollable_add_fd(&pollset->pollable, fd);
+      pollable_add_fd(&pollset->pollable_obj, had_fd);
+      pollable_add_fd(&pollset->pollable_obj, fd);
     }
     GRPC_CLOSURE_SCHED(exec_ctx,
                        GRPC_CLOSURE_CREATE(unref_fd_no_longer_poller, had_fd,
@@ -1070,9 +1081,9 @@ static grpc_error *pollset_add_fd_locked(grpc_exec_ctx *exec_ctx,
 
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
-  gpr_mu_lock(&pollset->pollable.po.mu);
+  gpr_mu_lock(&pollset->pollable_obj.po.mu);
   grpc_error *error = pollset_add_fd_locked(exec_ctx, pollset, fd, false);
-  gpr_mu_unlock(&pollset->pollable.po.mu);
+  gpr_mu_unlock(&pollset->pollable_obj.po.mu);
   GRPC_LOG_IF_ERROR("pollset_add_fd", error);
 }
 
@@ -1094,7 +1105,7 @@ static void pollset_set_destroy(grpc_exec_ctx *exec_ctx,
 
 static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss,
                                grpc_fd *fd) {
-  po_join(exec_ctx, &pss->po, &fd->pollable.po);
+  po_join(exec_ctx, &pss->po, &fd->pollable_obj.po);
 }
 
 static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss,
@@ -1102,7 +1113,7 @@ static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss,
 
 static void pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
                                     grpc_pollset_set *pss, grpc_pollset *ps) {
-  po_join(exec_ctx, &pss->po, &ps->pollable.po);
+  po_join(exec_ctx, &pss->po, &ps->pollable_obj.po);
 }
 
 static void pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
@@ -1385,34 +1396,34 @@ static void shutdown_engine(void) {
 }
 
 static const grpc_event_engine_vtable vtable = {
-    .pollset_size = sizeof(grpc_pollset),
-
-    .fd_create = fd_create,
-    .fd_wrapped_fd = fd_wrapped_fd,
-    .fd_orphan = fd_orphan,
-    .fd_shutdown = fd_shutdown,
-    .fd_is_shutdown = fd_is_shutdown,
-    .fd_notify_on_read = fd_notify_on_read,
-    .fd_notify_on_write = fd_notify_on_write,
-    .fd_get_read_notifier_pollset = fd_get_read_notifier_pollset,
-
-    .pollset_init = pollset_init,
-    .pollset_shutdown = pollset_shutdown,
-    .pollset_destroy = pollset_destroy,
-    .pollset_work = pollset_work,
-    .pollset_kick = pollset_kick,
-    .pollset_add_fd = pollset_add_fd,
-
-    .pollset_set_create = pollset_set_create,
-    .pollset_set_destroy = pollset_set_destroy,
-    .pollset_set_add_pollset = pollset_set_add_pollset,
-    .pollset_set_del_pollset = pollset_set_del_pollset,
-    .pollset_set_add_pollset_set = pollset_set_add_pollset_set,
-    .pollset_set_del_pollset_set = pollset_set_del_pollset_set,
-    .pollset_set_add_fd = pollset_set_add_fd,
-    .pollset_set_del_fd = pollset_set_del_fd,
-
-    .shutdown_engine = shutdown_engine,
+    sizeof(grpc_pollset),
+
+    fd_create,
+    fd_wrapped_fd,
+    fd_orphan,
+    fd_shutdown,
+    fd_notify_on_read,
+    fd_notify_on_write,
+    fd_is_shutdown,
+    fd_get_read_notifier_pollset,
+
+    pollset_init,
+    pollset_shutdown,
+    pollset_destroy,
+    pollset_work,
+    pollset_kick,
+    pollset_add_fd,
+
+    pollset_set_create,
+    pollset_set_destroy,
+    pollset_set_add_pollset,
+    pollset_set_del_pollset,
+    pollset_set_add_pollset_set,
+    pollset_set_del_pollset_set,
+    pollset_set_add_fd,
+    pollset_set_del_fd,
+
+    shutdown_engine,
 };
 
 const grpc_event_engine_vtable *grpc_init_epollex_linux(
diff --git a/src/core/lib/iomgr/ev_epollsig_linux.c b/src/core/lib/iomgr/ev_epollsig_linux.c
index b88c3ba111..4d8bdf1401 100644
--- a/src/core/lib/iomgr/ev_epollsig_linux.c
+++ b/src/core/lib/iomgr/ev_epollsig_linux.c
@@ -1021,10 +1021,11 @@ 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_pollset *p,
+static grpc_error *pollset_kick(grpc_exec_ctx *exec_ctx, 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);
   const char *err_desc = "Kick Failure";
   grpc_pollset_worker *worker = specific_worker;
   if (worker != NULL) {
@@ -1132,7 +1133,8 @@ static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
 }
 
 static void pollset_release_polling_island(grpc_exec_ctx *exec_ctx,
-                                           grpc_pollset *ps, char *reason) {
+                                           grpc_pollset *ps,
+                                           const char *reason) {
   if (ps->po.pi != NULL) {
     PI_UNREF(exec_ctx, ps->po.pi, reason);
   }
@@ -1158,7 +1160,7 @@ static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   GPR_ASSERT(!pollset->shutting_down);
   pollset->shutting_down = true;
   pollset->shutdown_done = closure;
-  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
+  pollset_kick(exec_ctx, 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
@@ -1670,34 +1672,34 @@ static void shutdown_engine(void) {
 }
 
 static const grpc_event_engine_vtable vtable = {
-    .pollset_size = sizeof(grpc_pollset),
-
-    .fd_create = fd_create,
-    .fd_wrapped_fd = fd_wrapped_fd,
-    .fd_orphan = fd_orphan,
-    .fd_shutdown = fd_shutdown,
-    .fd_is_shutdown = fd_is_shutdown,
-    .fd_notify_on_read = fd_notify_on_read,
-    .fd_notify_on_write = fd_notify_on_write,
-    .fd_get_read_notifier_pollset = fd_get_read_notifier_pollset,
-
-    .pollset_init = pollset_init,
-    .pollset_shutdown = pollset_shutdown,
-    .pollset_destroy = pollset_destroy,
-    .pollset_work = pollset_work,
-    .pollset_kick = pollset_kick,
-    .pollset_add_fd = pollset_add_fd,
-
-    .pollset_set_create = pollset_set_create,
-    .pollset_set_destroy = pollset_set_destroy,
-    .pollset_set_add_pollset = pollset_set_add_pollset,
-    .pollset_set_del_pollset = pollset_set_del_pollset,
-    .pollset_set_add_pollset_set = pollset_set_add_pollset_set,
-    .pollset_set_del_pollset_set = pollset_set_del_pollset_set,
-    .pollset_set_add_fd = pollset_set_add_fd,
-    .pollset_set_del_fd = pollset_set_del_fd,
-
-    .shutdown_engine = shutdown_engine,
+    sizeof(grpc_pollset),
+
+    fd_create,
+    fd_wrapped_fd,
+    fd_orphan,
+    fd_shutdown,
+    fd_notify_on_read,
+    fd_notify_on_write,
+    fd_is_shutdown,
+    fd_get_read_notifier_pollset,
+
+    pollset_init,
+    pollset_shutdown,
+    pollset_destroy,
+    pollset_work,
+    pollset_kick,
+    pollset_add_fd,
+
+    pollset_set_create,
+    pollset_set_destroy,
+    pollset_set_add_pollset,
+    pollset_set_del_pollset,
+    pollset_set_add_pollset_set,
+    pollset_set_del_pollset_set,
+    pollset_set_add_fd,
+    pollset_set_del_fd,
+
+    shutdown_engine,
 };
 
 /* It is possible that GLIBC has epoll but the underlying kernel doesn't.
diff --git a/src/core/lib/iomgr/ev_poll_posix.c b/src/core/lib/iomgr/ev_poll_posix.c
index bcf1d9001b..e170702dca 100644
--- a/src/core/lib/iomgr/ev_poll_posix.c
+++ b/src/core/lib/iomgr/ev_poll_posix.c
@@ -209,7 +209,7 @@ static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
 #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_pollset *p,
+static grpc_error *pollset_kick_ext(grpc_exec_ctx *exec_ctx, grpc_pollset *p,
                                     grpc_pollset_worker *specific_worker,
                                     uint32_t flags) GRPC_MUST_USE_RESULT;
 
@@ -365,36 +365,39 @@ static grpc_pollset *fd_get_read_notifier_pollset(grpc_exec_ctx *exec_ctx,
   return notifier;
 }
 
-static grpc_error *pollset_kick_locked(grpc_fd_watcher *watcher) {
+static grpc_error *pollset_kick_locked(grpc_exec_ctx *exec_ctx,
+                                       grpc_fd_watcher *watcher) {
   gpr_mu_lock(&watcher->pollset->mu);
   GPR_ASSERT(watcher->worker);
-  grpc_error *err = pollset_kick_ext(watcher->pollset, watcher->worker,
-                                     GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
+  grpc_error *err =
+      pollset_kick_ext(exec_ctx, 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_fd *fd) {
+static void maybe_wake_one_watcher_locked(grpc_exec_ctx *exec_ctx,
+                                          grpc_fd *fd) {
   if (fd->inactive_watcher_root.next != &fd->inactive_watcher_root) {
-    pollset_kick_locked(fd->inactive_watcher_root.next);
+    pollset_kick_locked(exec_ctx, fd->inactive_watcher_root.next);
   } else if (fd->read_watcher) {
-    pollset_kick_locked(fd->read_watcher);
+    pollset_kick_locked(exec_ctx, fd->read_watcher);
   } else if (fd->write_watcher) {
-    pollset_kick_locked(fd->write_watcher);
+    pollset_kick_locked(exec_ctx, fd->write_watcher);
   }
 }
 
-static void wake_all_watchers_locked(grpc_fd *fd) {
+static void wake_all_watchers_locked(grpc_exec_ctx *exec_ctx, 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(watcher);
+    pollset_kick_locked(exec_ctx, watcher);
   }
   if (fd->read_watcher) {
-    pollset_kick_locked(fd->read_watcher);
+    pollset_kick_locked(exec_ctx, fd->read_watcher);
   }
   if (fd->write_watcher && fd->write_watcher != fd->read_watcher) {
-    pollset_kick_locked(fd->write_watcher);
+    pollset_kick_locked(exec_ctx, fd->write_watcher);
   }
 }
 
@@ -435,7 +438,7 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   if (!has_watchers(fd)) {
     close_fd_locked(exec_ctx, fd);
   } else {
-    wake_all_watchers_locked(fd);
+    wake_all_watchers_locked(exec_ctx, fd);
   }
   gpr_mu_unlock(&fd->mu);
   UNREF_BY(fd, 2, reason); /* drop the reference */
@@ -479,7 +482,7 @@ static void notify_on_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
     /* 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(fd);
+    maybe_wake_one_watcher_locked(exec_ctx, fd);
   } else {
     /* upcallptr was set to a different closure.  This is an error! */
     gpr_log(GPR_ERROR,
@@ -648,7 +651,7 @@ static void fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *watcher,
     }
   }
   if (kick) {
-    maybe_wake_one_watcher_locked(fd);
+    maybe_wake_one_watcher_locked(exec_ctx, fd);
   }
   if (fd_is_orphaned(fd) && !has_watchers(fd) && !fd->closed) {
     close_fd_locked(exec_ctx, fd);
@@ -712,11 +715,12 @@ 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_pollset *p,
+static grpc_error *pollset_kick_ext(grpc_exec_ctx *exec_ctx, 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);
 
   /* pollset->mu already held */
   if (specific_worker != NULL) {
@@ -782,9 +786,9 @@ static grpc_error *pollset_kick_ext(grpc_pollset *p,
   return error;
 }
 
-static grpc_error *pollset_kick(grpc_pollset *p,
+static grpc_error *pollset_kick(grpc_exec_ctx *exec_ctx, grpc_pollset *p,
                                 grpc_pollset_worker *specific_worker) {
-  return pollset_kick_ext(p, specific_worker, 0);
+  return pollset_kick_ext(exec_ctx, p, specific_worker, 0);
 }
 
 /* global state management */
@@ -847,7 +851,7 @@ 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(pollset, NULL);
+  pollset_kick(exec_ctx, pollset, NULL);
 exit:
   gpr_mu_unlock(&pollset->mu);
 }
@@ -1083,7 +1087,7 @@ 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(pollset, NULL);
+      pollset_kick(exec_ctx, pollset, NULL);
     } else if (!pollset->called_shutdown && !pollset_has_observers(pollset)) {
       pollset->called_shutdown = 1;
       gpr_mu_unlock(&pollset->mu);
@@ -1112,7 +1116,7 @@ static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   GPR_ASSERT(!pollset->shutting_down);
   pollset->shutting_down = 1;
   pollset->shutdown_done = closure;
-  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
+  pollset_kick(exec_ctx, pollset, GRPC_POLLSET_KICK_BROADCAST);
   if (!pollset_has_workers(pollset)) {
     GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pollset->idle_jobs);
   }
@@ -1539,7 +1543,7 @@ static int cvfd_poll(struct pollfd *fds, nfds_t nfds, int timeout) {
   for (i = 0; i < nfds; i++) {
     fds[i].revents = 0;
     if (fds[i].fd < 0 && (fds[i].events & POLLIN)) {
-      idx = FD_TO_IDX(fds[i].fd);
+      idx = GRPC_FD_TO_IDX(fds[i].fd);
       fd_cvs[i].cv = &pollcv_cv;
       fd_cvs[i].prev = NULL;
       fd_cvs[i].next = g_cvfds.cvfds[idx].cvs;
@@ -1602,8 +1606,8 @@ static int cvfd_poll(struct pollfd *fds, nfds_t nfds, int timeout) {
   idx = 0;
   for (i = 0; i < nfds; i++) {
     if (fds[i].fd < 0 && (fds[i].events & POLLIN)) {
-      remove_cvn(&g_cvfds.cvfds[FD_TO_IDX(fds[i].fd)].cvs, &(fd_cvs[i]));
-      if (g_cvfds.cvfds[FD_TO_IDX(fds[i].fd)].is_set) {
+      remove_cvn(&g_cvfds.cvfds[GRPC_FD_TO_IDX(fds[i].fd)].cvs, &(fd_cvs[i]));
+      if (g_cvfds.cvfds[GRPC_FD_TO_IDX(fds[i].fd)].is_set) {
         fds[i].revents = POLLIN;
         if (res >= 0) res++;
       }
@@ -1688,34 +1692,34 @@ static void shutdown_engine(void) {
 }
 
 static const grpc_event_engine_vtable vtable = {
-    .pollset_size = sizeof(grpc_pollset),
-
-    .fd_create = fd_create,
-    .fd_wrapped_fd = fd_wrapped_fd,
-    .fd_orphan = fd_orphan,
-    .fd_shutdown = fd_shutdown,
-    .fd_is_shutdown = fd_is_shutdown,
-    .fd_notify_on_read = fd_notify_on_read,
-    .fd_notify_on_write = fd_notify_on_write,
-    .fd_get_read_notifier_pollset = fd_get_read_notifier_pollset,
-
-    .pollset_init = pollset_init,
-    .pollset_shutdown = pollset_shutdown,
-    .pollset_destroy = pollset_destroy,
-    .pollset_work = pollset_work,
-    .pollset_kick = pollset_kick,
-    .pollset_add_fd = pollset_add_fd,
-
-    .pollset_set_create = pollset_set_create,
-    .pollset_set_destroy = pollset_set_destroy,
-    .pollset_set_add_pollset = pollset_set_add_pollset,
-    .pollset_set_del_pollset = pollset_set_del_pollset,
-    .pollset_set_add_pollset_set = pollset_set_add_pollset_set,
-    .pollset_set_del_pollset_set = pollset_set_del_pollset_set,
-    .pollset_set_add_fd = pollset_set_add_fd,
-    .pollset_set_del_fd = pollset_set_del_fd,
-
-    .shutdown_engine = shutdown_engine,
+    sizeof(grpc_pollset),
+
+    fd_create,
+    fd_wrapped_fd,
+    fd_orphan,
+    fd_shutdown,
+    fd_notify_on_read,
+    fd_notify_on_write,
+    fd_is_shutdown,
+    fd_get_read_notifier_pollset,
+
+    pollset_init,
+    pollset_shutdown,
+    pollset_destroy,
+    pollset_work,
+    pollset_kick,
+    pollset_add_fd,
+
+    pollset_set_create,
+    pollset_set_destroy,
+    pollset_set_add_pollset,
+    pollset_set_del_pollset,
+    pollset_set_add_pollset_set,
+    pollset_set_del_pollset_set,
+    pollset_set_add_fd,
+    pollset_set_del_fd,
+
+    shutdown_engine,
 };
 
 const grpc_event_engine_vtable *grpc_init_poll_posix(bool explicit_request) {
diff --git a/src/core/lib/iomgr/ev_posix.c b/src/core/lib/iomgr/ev_posix.c
index d881e2d4dd..4d3ae2228e 100644
--- a/src/core/lib/iomgr/ev_posix.c
+++ b/src/core/lib/iomgr/ev_posix.c
@@ -210,9 +210,9 @@ grpc_error *grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   return g_event_engine->pollset_work(exec_ctx, pollset, worker, now, deadline);
 }
 
-grpc_error *grpc_pollset_kick(grpc_pollset *pollset,
+grpc_error *grpc_pollset_kick(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                               grpc_pollset_worker *specific_worker) {
-  return g_event_engine->pollset_kick(pollset, specific_worker);
+  return g_event_engine->pollset_kick(exec_ctx, pollset, specific_worker);
 }
 
 void grpc_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
diff --git a/src/core/lib/iomgr/ev_posix.h b/src/core/lib/iomgr/ev_posix.h
index 1108e46ef8..1ff2ff1413 100644
--- a/src/core/lib/iomgr/ev_posix.h
+++ b/src/core/lib/iomgr/ev_posix.h
@@ -54,7 +54,7 @@ typedef struct grpc_event_engine_vtable {
   grpc_error *(*pollset_work)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                               grpc_pollset_worker **worker, gpr_timespec now,
                               gpr_timespec deadline);
-  grpc_error *(*pollset_kick)(grpc_pollset *pollset,
+  grpc_error *(*pollset_kick)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                               grpc_pollset_worker *specific_worker);
   void (*pollset_add_fd)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                          struct grpc_fd *fd);
diff --git a/src/core/lib/iomgr/executor.c b/src/core/lib/iomgr/executor.c
index 892385d7d7..2439f15a8a 100644
--- a/src/core/lib/iomgr/executor.c
+++ b/src/core/lib/iomgr/executor.c
@@ -32,16 +32,14 @@
 #include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/support/spinlock.h"
 
-#define MAX_DEPTH 2
-
 typedef struct {
   gpr_mu mu;
   gpr_cv cv;
   grpc_closure_list elems;
-  size_t depth;
   bool shutdown;
   bool queued_long_job;
   gpr_thd_id id;
+  grpc_closure_list local_elems;
 } thread_state;
 
 static thread_state *g_thread_state;
@@ -56,32 +54,35 @@ static grpc_tracer_flag executor_trace =
 
 static void executor_thread(void *arg);
 
-static size_t run_closures(grpc_exec_ctx *exec_ctx, grpc_closure_list list) {
-  size_t n = 0;
+static void run_closures(grpc_exec_ctx *exec_ctx, grpc_closure_list *list) {
+  int n = 0;  // number of closures executed
 
-  grpc_closure *c = list.head;
-  while (c != NULL) {
-    grpc_closure *next = c->next_data.next;
-    grpc_error *error = c->error_data.error;
-    if (GRPC_TRACER_ON(executor_trace)) {
+  while (!grpc_closure_list_empty(*list)) {
+    grpc_closure *c = list->head;
+    grpc_closure_list_init(list);
+    while (c != NULL) {
+      grpc_closure *next = c->next_data.next;
+      grpc_error *error = c->error_data.error;
+      if (GRPC_TRACER_ON(executor_trace)) {
 #ifndef NDEBUG
-      gpr_log(GPR_DEBUG, "EXECUTOR: run %p [created by %s:%d]", c,
-              c->file_created, c->line_created);
+        gpr_log(GPR_DEBUG, "EXECUTOR: run %p [created by %s:%d]", c,
+                c->file_created, c->line_created);
 #else
-      gpr_log(GPR_DEBUG, "EXECUTOR: run %p", c);
+        gpr_log(GPR_DEBUG, "EXECUTOR: run %p", c);
 #endif
-    }
+      }
 #ifndef NDEBUG
-    c->scheduled = false;
+      c->scheduled = false;
 #endif
-    c->cb(exec_ctx, c->cb_arg, error);
-    GRPC_ERROR_UNREF(error);
-    c = next;
-    n++;
-    grpc_exec_ctx_flush(exec_ctx);
+      n++;
+      c->cb(exec_ctx, c->cb_arg, error);
+      GRPC_ERROR_UNREF(error);
+      c = next;
+      grpc_exec_ctx_flush(exec_ctx);
+    }
   }
 
-  return n;
+  GRPC_STATS_INC_EXECUTOR_CLOSURES_PER_WAKEUP(exec_ctx, n);
 }
 
 bool grpc_executor_is_threaded() {
@@ -126,7 +127,7 @@ 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(exec_ctx, &g_thread_state[i].elems);
     }
     gpr_free(g_thread_state);
     gpr_tls_destroy(&g_this_thread_state);
@@ -150,14 +151,14 @@ static void executor_thread(void *arg) {
   grpc_exec_ctx exec_ctx =
       GRPC_EXEC_CTX_INITIALIZER(0, grpc_never_ready_to_finish, NULL);
 
-  size_t subtract_depth = 0;
+  GRPC_STATS_INC_EXECUTOR_THREADS_CREATED(&exec_ctx);
+
+  bool used = false;
   for (;;) {
     if (GRPC_TRACER_ON(executor_trace)) {
-      gpr_log(GPR_DEBUG, "EXECUTOR[%d]: step (sub_depth=%" PRIdPTR ")",
-              (int)(ts - g_thread_state), subtract_depth);
+      gpr_log(GPR_DEBUG, "EXECUTOR[%d]: step", (int)(ts - g_thread_state));
     }
     gpr_mu_lock(&ts->mu);
-    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));
@@ -170,15 +171,20 @@ static void executor_thread(void *arg) {
       gpr_mu_unlock(&ts->mu);
       break;
     }
+    if (!used) {
+      GRPC_STATS_INC_EXECUTOR_THREADS_USED(&exec_ctx);
+      used = true;
+    }
     GRPC_STATS_INC_EXECUTOR_QUEUE_DRAINED(&exec_ctx);
-    grpc_closure_list exec = ts->elems;
+    GPR_ASSERT(grpc_closure_list_empty(ts->local_elems));
+    ts->local_elems = ts->elems;
     ts->elems = (grpc_closure_list)GRPC_CLOSURE_LIST_INIT;
     gpr_mu_unlock(&ts->mu);
     if (GRPC_TRACER_ON(executor_trace)) {
       gpr_log(GPR_DEBUG, "EXECUTOR[%d]: execute", (int)(ts - g_thread_state));
     }
 
-    subtract_depth = run_closures(&exec_ctx, exec);
+    run_closures(&exec_ctx, &ts->local_elems);
   }
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -211,6 +217,10 @@ static void executor_push(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
       ts = &g_thread_state[GPR_HASH_POINTER(exec_ctx, cur_thread_count)];
     } else {
       GRPC_STATS_INC_EXECUTOR_SCHEDULED_TO_SELF(exec_ctx);
+      if (is_short) {
+        grpc_closure_list_append(&ts->local_elems, closure, error);
+        return;
+      }
     }
     thread_state *orig_ts = ts;
 
@@ -250,8 +260,7 @@ static void executor_push(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
         gpr_cv_signal(&ts->cv);
       }
       grpc_closure_list_append(&ts->elems, closure, error);
-      ts->depth++;
-      try_new_thread = ts->depth > MAX_DEPTH &&
+      try_new_thread = ts->elems.head != closure &&
                        cur_thread_count < g_max_threads && !ts->shutdown;
       if (!is_short) ts->queued_long_job = true;
       gpr_mu_unlock(&ts->mu);
diff --git a/src/core/lib/iomgr/iomgr.c b/src/core/lib/iomgr/iomgr.c
index 1feea6d628..f63f190155 100644
--- a/src/core/lib/iomgr/iomgr.c
+++ b/src/core/lib/iomgr/iomgr.c
@@ -50,7 +50,7 @@ void grpc_iomgr_init(grpc_exec_ctx *exec_ctx) {
   grpc_executor_init(exec_ctx);
   grpc_timer_list_init(gpr_now(GPR_CLOCK_MONOTONIC));
   g_root_object.next = g_root_object.prev = &g_root_object;
-  g_root_object.name = "root";
+  g_root_object.name = (char *)"root";
   grpc_network_status_init();
   grpc_iomgr_platform_init();
 }
diff --git a/src/core/lib/iomgr/is_epollexclusive_available.c b/src/core/lib/iomgr/is_epollexclusive_available.c
index e8a7d4d52c..d08844c0df 100644
--- a/src/core/lib/iomgr/is_epollexclusive_available.c
+++ b/src/core/lib/iomgr/is_epollexclusive_available.c
@@ -57,12 +57,12 @@ bool grpc_is_epollexclusive_available(void) {
     close(fd);
     return false;
   }
-  struct epoll_event ev = {
-      /* choose events that should cause an error on
-         EPOLLEXCLUSIVE enabled kernels - specifically the combination of
-         EPOLLONESHOT and EPOLLEXCLUSIVE */
-      .events = (uint32_t)(EPOLLET | EPOLLIN | EPOLLEXCLUSIVE | EPOLLONESHOT),
-      .data.ptr = NULL};
+  struct epoll_event ev;
+  /* choose events that should cause an error on
+     EPOLLEXCLUSIVE enabled kernels - specifically the combination of
+     EPOLLONESHOT and EPOLLEXCLUSIVE */
+  ev.events = (uint32_t)(EPOLLET | EPOLLIN | EPOLLEXCLUSIVE | EPOLLONESHOT);
+  ev.data.ptr = NULL;
   if (epoll_ctl(fd, EPOLL_CTL_ADD, evfd, &ev) != 0) {
     if (errno != EINVAL) {
       if (!logged_why_not) {
diff --git a/src/core/lib/iomgr/polling_entity.c b/src/core/lib/iomgr/polling_entity.c
index 74d8794af5..8591a5518e 100644
--- a/src/core/lib/iomgr/polling_entity.c
+++ b/src/core/lib/iomgr/polling_entity.c
@@ -25,7 +25,7 @@ grpc_polling_entity grpc_polling_entity_create_from_pollset_set(
     grpc_pollset_set *pollset_set) {
   grpc_polling_entity pollent;
   pollent.pollent.pollset_set = pollset_set;
-  pollent.tag = POPS_POLLSET_SET;
+  pollent.tag = GRPC_POLLS_POLLSET_SET;
   return pollent;
 }
 
@@ -33,12 +33,12 @@ grpc_polling_entity grpc_polling_entity_create_from_pollset(
     grpc_pollset *pollset) {
   grpc_polling_entity pollent;
   pollent.pollent.pollset = pollset;
-  pollent.tag = POPS_POLLSET;
+  pollent.tag = GRPC_POLLS_POLLSET;
   return pollent;
 }
 
 grpc_pollset *grpc_polling_entity_pollset(grpc_polling_entity *pollent) {
-  if (pollent->tag == POPS_POLLSET) {
+  if (pollent->tag == GRPC_POLLS_POLLSET) {
     return pollent->pollent.pollset;
   }
   return NULL;
@@ -46,23 +46,23 @@ grpc_pollset *grpc_polling_entity_pollset(grpc_polling_entity *pollent) {
 
 grpc_pollset_set *grpc_polling_entity_pollset_set(
     grpc_polling_entity *pollent) {
-  if (pollent->tag == POPS_POLLSET_SET) {
+  if (pollent->tag == GRPC_POLLS_POLLSET_SET) {
     return pollent->pollent.pollset_set;
   }
   return NULL;
 }
 
 bool grpc_polling_entity_is_empty(const grpc_polling_entity *pollent) {
-  return pollent->tag == POPS_NONE;
+  return pollent->tag == GRPC_POLLS_NONE;
 }
 
 void grpc_polling_entity_add_to_pollset_set(grpc_exec_ctx *exec_ctx,
                                             grpc_polling_entity *pollent,
                                             grpc_pollset_set *pss_dst) {
-  if (pollent->tag == POPS_POLLSET) {
+  if (pollent->tag == GRPC_POLLS_POLLSET) {
     GPR_ASSERT(pollent->pollent.pollset != NULL);
     grpc_pollset_set_add_pollset(exec_ctx, pss_dst, pollent->pollent.pollset);
-  } else if (pollent->tag == POPS_POLLSET_SET) {
+  } else if (pollent->tag == GRPC_POLLS_POLLSET_SET) {
     GPR_ASSERT(pollent->pollent.pollset_set != NULL);
     grpc_pollset_set_add_pollset_set(exec_ctx, pss_dst,
                                      pollent->pollent.pollset_set);
@@ -75,10 +75,10 @@ void grpc_polling_entity_add_to_pollset_set(grpc_exec_ctx *exec_ctx,
 void grpc_polling_entity_del_from_pollset_set(grpc_exec_ctx *exec_ctx,
                                               grpc_polling_entity *pollent,
                                               grpc_pollset_set *pss_dst) {
-  if (pollent->tag == POPS_POLLSET) {
+  if (pollent->tag == GRPC_POLLS_POLLSET) {
     GPR_ASSERT(pollent->pollent.pollset != NULL);
     grpc_pollset_set_del_pollset(exec_ctx, pss_dst, pollent->pollent.pollset);
-  } else if (pollent->tag == POPS_POLLSET_SET) {
+  } else if (pollent->tag == GRPC_POLLS_POLLSET_SET) {
     GPR_ASSERT(pollent->pollent.pollset_set != NULL);
     grpc_pollset_set_del_pollset_set(exec_ctx, pss_dst,
                                      pollent->pollent.pollset_set);
diff --git a/src/core/lib/iomgr/polling_entity.h b/src/core/lib/iomgr/polling_entity.h
index 971fd88b42..a161e1fea6 100644
--- a/src/core/lib/iomgr/polling_entity.h
+++ b/src/core/lib/iomgr/polling_entity.h
@@ -22,6 +22,12 @@
 #include "src/core/lib/iomgr/pollset.h"
 #include "src/core/lib/iomgr/pollset_set.h"
 
+typedef enum grpc_pollset_tag {
+  GRPC_POLLS_NONE,
+  GRPC_POLLS_POLLSET,
+  GRPC_POLLS_POLLSET_SET
+} grpc_pollset_tag;
+
 /* A grpc_polling_entity is a pollset-or-pollset_set container. It allows
  * functions that accept a pollset XOR a pollset_set to do so through an
  * abstract interface. No ownership is taken. */
@@ -31,7 +37,7 @@ typedef struct grpc_polling_entity {
     grpc_pollset *pollset;
     grpc_pollset_set *pollset_set;
   } pollent;
-  enum pops_tag { POPS_NONE, POPS_POLLSET, POPS_POLLSET_SET } tag;
+  grpc_pollset_tag tag;
 } grpc_polling_entity;
 
 grpc_polling_entity grpc_polling_entity_create_from_pollset_set(
diff --git a/src/core/lib/iomgr/pollset.h b/src/core/lib/iomgr/pollset.h
index a609a3877a..a0f6b3a9d3 100644
--- a/src/core/lib/iomgr/pollset.h
+++ b/src/core/lib/iomgr/pollset.h
@@ -76,7 +76,7 @@ grpc_error *grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 
 /* 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_pollset *pollset,
+grpc_error *grpc_pollset_kick(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                               grpc_pollset_worker *specific_worker)
     GRPC_MUST_USE_RESULT;
 
diff --git a/src/core/lib/iomgr/pollset_uv.c b/src/core/lib/iomgr/pollset_uv.c
index a79fe89d3e..2651325e25 100644
--- a/src/core/lib/iomgr/pollset_uv.c
+++ b/src/core/lib/iomgr/pollset_uv.c
@@ -145,7 +145,7 @@ grpc_error *grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   return GRPC_ERROR_NONE;
 }
 
-grpc_error *grpc_pollset_kick(grpc_pollset *pollset,
+grpc_error *grpc_pollset_kick(grpc_exec_ctx *exec_ctx, 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.c b/src/core/lib/iomgr/pollset_windows.c
index ea017a6054..eb295d3eeb 100644
--- a/src/core/lib/iomgr/pollset_windows.c
+++ b/src/core/lib/iomgr/pollset_windows.c
@@ -98,7 +98,7 @@ void grpc_pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
 void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_closure *closure) {
   pollset->shutting_down = 1;
-  grpc_pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
+  grpc_pollset_kick(exec_ctx, pollset, GRPC_POLLSET_KICK_BROADCAST);
   if (!pollset->is_iocp_worker) {
     GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
   } else {
@@ -181,7 +181,7 @@ done:
   return GRPC_ERROR_NONE;
 }
 
-grpc_error *grpc_pollset_kick(grpc_pollset *p,
+grpc_error *grpc_pollset_kick(grpc_exec_ctx *exec_ctx, grpc_pollset *p,
                               grpc_pollset_worker *specific_worker) {
   if (specific_worker != NULL) {
     if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
@@ -209,7 +209,7 @@ grpc_error *grpc_pollset_kick(grpc_pollset *p,
     specific_worker =
         pop_front_worker(&p->root_worker, GRPC_POLLSET_WORKER_LINK_POLLSET);
     if (specific_worker != NULL) {
-      grpc_pollset_kick(p, specific_worker);
+      grpc_pollset_kick(exec_ctx, p, specific_worker);
     } else if (p->is_iocp_worker) {
       grpc_iocp_kick();
     } else {
diff --git a/src/core/lib/iomgr/resolve_address_posix.c b/src/core/lib/iomgr/resolve_address_posix.c
index 082e3b7947..60cfeebd47 100644
--- a/src/core/lib/iomgr/resolve_address_posix.c
+++ b/src/core/lib/iomgr/resolve_address_posix.c
@@ -85,7 +85,7 @@ static grpc_error *blocking_resolve_address_impl(
 
   if (s != 0) {
     /* Retry if well-known service name is recognized */
-    char *svc[][2] = {{"http", "80"}, {"https", "443"}};
+    const char *svc[][2] = {{"http", "80"}, {"https", "443"}};
     for (i = 0; i < GPR_ARRAY_SIZE(svc); i++) {
       if (strcmp(port, svc[i][0]) == 0) {
         GRPC_SCHEDULING_START_BLOCKING_REGION;
diff --git a/src/core/lib/iomgr/resource_quota.c b/src/core/lib/iomgr/resource_quota.c
index 6c58986b53..4d69986fbc 100644
--- a/src/core/lib/iomgr/resource_quota.c
+++ b/src/core/lib/iomgr/resource_quota.c
@@ -22,6 +22,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
@@ -656,7 +657,7 @@ grpc_resource_quota *grpc_resource_quota_from_channel_args(
     if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
       if (channel_args->args[i].type == GRPC_ARG_POINTER) {
         return grpc_resource_quota_ref_internal(
-            channel_args->args[i].value.pointer.p);
+            (grpc_resource_quota *)channel_args->args[i].value.pointer.p);
       } else {
         gpr_log(GPR_DEBUG, GRPC_ARG_RESOURCE_QUOTA " should be a pointer");
       }
@@ -666,12 +667,12 @@ grpc_resource_quota *grpc_resource_quota_from_channel_args(
 }
 
 static void *rq_copy(void *rq) {
-  grpc_resource_quota_ref(rq);
+  grpc_resource_quota_ref((grpc_resource_quota *)rq);
   return rq;
 }
 
 static void rq_destroy(grpc_exec_ctx *exec_ctx, void *rq) {
-  grpc_resource_quota_unref_internal(exec_ctx, rq);
+  grpc_resource_quota_unref_internal(exec_ctx, (grpc_resource_quota *)rq);
 }
 
 static int rq_cmp(void *a, void *b) { return GPR_ICMP(a, b); }
diff --git a/src/core/lib/iomgr/socket_factory_posix.c b/src/core/lib/iomgr/socket_factory_posix.c
index 0f82dea570..8e907703ae 100644
--- a/src/core/lib/iomgr/socket_factory_posix.c
+++ b/src/core/lib/iomgr/socket_factory_posix.c
@@ -69,11 +69,11 @@ void grpc_socket_factory_unref(grpc_socket_factory *factory) {
 }
 
 static void *socket_factory_arg_copy(void *p) {
-  return grpc_socket_factory_ref(p);
+  return grpc_socket_factory_ref((grpc_socket_factory *)p);
 }
 
 static void socket_factory_arg_destroy(grpc_exec_ctx *exec_ctx, void *p) {
-  grpc_socket_factory_unref(p);
+  grpc_socket_factory_unref((grpc_socket_factory *)p);
 }
 
 static int socket_factory_cmp(void *a, void *b) {
@@ -85,8 +85,8 @@ static const grpc_arg_pointer_vtable socket_factory_arg_vtable = {
     socket_factory_arg_copy, socket_factory_arg_destroy, socket_factory_cmp};
 
 grpc_arg grpc_socket_factory_to_arg(grpc_socket_factory *factory) {
-  return grpc_channel_arg_pointer_create(GRPC_ARG_SOCKET_FACTORY, factory,
-                                         &socket_factory_arg_vtable);
+  return grpc_channel_arg_pointer_create((char *)GRPC_ARG_SOCKET_FACTORY,
+                                         factory, &socket_factory_arg_vtable);
 }
 
 #endif
diff --git a/src/core/lib/iomgr/socket_mutator.c b/src/core/lib/iomgr/socket_mutator.c
index 5d6c2c400e..b0435d5a07 100644
--- a/src/core/lib/iomgr/socket_mutator.c
+++ b/src/core/lib/iomgr/socket_mutator.c
@@ -60,11 +60,11 @@ void grpc_socket_mutator_unref(grpc_socket_mutator *mutator) {
 }
 
 static void *socket_mutator_arg_copy(void *p) {
-  return grpc_socket_mutator_ref(p);
+  return grpc_socket_mutator_ref((grpc_socket_mutator *)p);
 }
 
 static void socket_mutator_arg_destroy(grpc_exec_ctx *exec_ctx, void *p) {
-  grpc_socket_mutator_unref(p);
+  grpc_socket_mutator_unref((grpc_socket_mutator *)p);
 }
 
 static int socket_mutator_cmp(void *a, void *b) {
@@ -76,6 +76,6 @@ static const grpc_arg_pointer_vtable socket_mutator_arg_vtable = {
     socket_mutator_arg_copy, socket_mutator_arg_destroy, socket_mutator_cmp};
 
 grpc_arg grpc_socket_mutator_to_arg(grpc_socket_mutator *mutator) {
-  return grpc_channel_arg_pointer_create(GRPC_ARG_SOCKET_MUTATOR, mutator,
-                                         &socket_mutator_arg_vtable);
+  return grpc_channel_arg_pointer_create((char *)GRPC_ARG_SOCKET_MUTATOR,
+                                         mutator, &socket_mutator_arg_vtable);
 }
diff --git a/src/core/lib/iomgr/tcp_server_posix.c b/src/core/lib/iomgr/tcp_server_posix.c
index c3ec3e447a..06612d639c 100644
--- a/src/core/lib/iomgr/tcp_server_posix.c
+++ b/src/core/lib/iomgr/tcp_server_posix.c
@@ -198,12 +198,12 @@ static void tcp_server_destroy(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
 /* event manager callback when reads are ready */
 static void on_read(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *err) {
   grpc_tcp_listener *sp = (grpc_tcp_listener *)arg;
-
+  grpc_pollset *read_notifier_pollset;
   if (err != GRPC_ERROR_NONE) {
     goto error;
   }
 
-  grpc_pollset *read_notifier_pollset =
+  read_notifier_pollset =
       sp->server->pollsets[(size_t)gpr_atm_no_barrier_fetch_add(
                                &sp->server->next_pollset_to_assign, 1) %
                            sp->server->pollset_count];
diff --git a/src/core/lib/iomgr/timer_generic.c b/src/core/lib/iomgr/timer_generic.c
index c08bb525b7..e9a7236c8c 100644
--- a/src/core/lib/iomgr/timer_generic.c
+++ b/src/core/lib/iomgr/timer_generic.c
@@ -95,9 +95,7 @@ struct shared_mutables {
   gpr_mu mu;
 } GPR_ALIGN_STRUCT(GPR_CACHELINE_SIZE);
 
-static struct shared_mutables g_shared_mutables = {
-    .checker_mu = GPR_SPINLOCK_STATIC_INITIALIZER, .initialized = false,
-};
+static struct shared_mutables g_shared_mutables;
 
 static gpr_clock_type g_clock_type;
 static gpr_timespec g_start_time;
@@ -155,6 +153,7 @@ void grpc_timer_list_init(gpr_timespec now) {
   uint32_t i;
 
   g_shared_mutables.initialized = true;
+  g_shared_mutables.checker_mu = GPR_SPINLOCK_INITIALIZER;
   gpr_mu_init(&g_shared_mutables.mu);
   g_clock_type = now.clock_type;
   g_start_time = now;
diff --git a/src/core/lib/iomgr/timer_manager.c b/src/core/lib/iomgr/timer_manager.c
index ae2c0bf0ae..04ca44563d 100644
--- a/src/core/lib/iomgr/timer_manager.c
+++ b/src/core/lib/iomgr/timer_manager.c
@@ -276,7 +276,7 @@ static void timer_thread(void *completed_thread_ptr) {
       GRPC_EXEC_CTX_INITIALIZER(0, grpc_never_ready_to_finish, NULL);
   timer_main_loop(&exec_ctx);
   grpc_exec_ctx_finish(&exec_ctx);
-  timer_thread_cleanup(completed_thread_ptr);
+  timer_thread_cleanup((completed_thread *)completed_thread_ptr);
 }
 
 static void start_threads(void) {
diff --git a/src/core/lib/iomgr/udp_server.c b/src/core/lib/iomgr/udp_server.c
index 9a02c1d1bb..00b2e68bb5 100644
--- a/src/core/lib/iomgr/udp_server.c
+++ b/src/core/lib/iomgr/udp_server.c
@@ -118,7 +118,7 @@ static grpc_socket_factory *get_socket_factory(const grpc_channel_args *args) {
     const grpc_arg *arg = grpc_channel_args_find(args, GRPC_ARG_SOCKET_FACTORY);
     if (arg) {
       GPR_ASSERT(arg->type == GRPC_ARG_POINTER);
-      return arg->value.pointer.p;
+      return (grpc_socket_factory *)arg->value.pointer.p;
     }
   }
   return NULL;
diff --git a/src/core/lib/iomgr/wakeup_fd_cv.c b/src/core/lib/iomgr/wakeup_fd_cv.c
index 5e0b1d1704..268e0175dd 100644
--- a/src/core/lib/iomgr/wakeup_fd_cv.c
+++ b/src/core/lib/iomgr/wakeup_fd_cv.c
@@ -57,7 +57,7 @@ static grpc_error* cv_fd_init(grpc_wakeup_fd* fd_info) {
   g_cvfds.free_fds = g_cvfds.free_fds->next_free;
   g_cvfds.cvfds[idx].cvs = NULL;
   g_cvfds.cvfds[idx].is_set = 0;
-  fd_info->read_fd = IDX_TO_FD(idx);
+  fd_info->read_fd = GRPC_IDX_TO_FD(idx);
   fd_info->write_fd = -1;
   gpr_mu_unlock(&g_cvfds.mu);
   return GRPC_ERROR_NONE;
@@ -66,8 +66,8 @@ static grpc_error* cv_fd_init(grpc_wakeup_fd* fd_info) {
 static grpc_error* cv_fd_wakeup(grpc_wakeup_fd* fd_info) {
   cv_node* cvn;
   gpr_mu_lock(&g_cvfds.mu);
-  g_cvfds.cvfds[FD_TO_IDX(fd_info->read_fd)].is_set = 1;
-  cvn = g_cvfds.cvfds[FD_TO_IDX(fd_info->read_fd)].cvs;
+  g_cvfds.cvfds[GRPC_FD_TO_IDX(fd_info->read_fd)].is_set = 1;
+  cvn = g_cvfds.cvfds[GRPC_FD_TO_IDX(fd_info->read_fd)].cvs;
   while (cvn) {
     gpr_cv_signal(cvn->cv);
     cvn = cvn->next;
@@ -78,7 +78,7 @@ static grpc_error* cv_fd_wakeup(grpc_wakeup_fd* fd_info) {
 
 static grpc_error* cv_fd_consume(grpc_wakeup_fd* fd_info) {
   gpr_mu_lock(&g_cvfds.mu);
-  g_cvfds.cvfds[FD_TO_IDX(fd_info->read_fd)].is_set = 0;
+  g_cvfds.cvfds[GRPC_FD_TO_IDX(fd_info->read_fd)].is_set = 0;
   gpr_mu_unlock(&g_cvfds.mu);
   return GRPC_ERROR_NONE;
 }
@@ -89,9 +89,9 @@ static void cv_fd_destroy(grpc_wakeup_fd* fd_info) {
   }
   gpr_mu_lock(&g_cvfds.mu);
   // Assert that there are no active pollers
-  GPR_ASSERT(!g_cvfds.cvfds[FD_TO_IDX(fd_info->read_fd)].cvs);
-  g_cvfds.cvfds[FD_TO_IDX(fd_info->read_fd)].next_free = g_cvfds.free_fds;
-  g_cvfds.free_fds = &g_cvfds.cvfds[FD_TO_IDX(fd_info->read_fd)];
+  GPR_ASSERT(!g_cvfds.cvfds[GRPC_FD_TO_IDX(fd_info->read_fd)].cvs);
+  g_cvfds.cvfds[GRPC_FD_TO_IDX(fd_info->read_fd)].next_free = g_cvfds.free_fds;
+  g_cvfds.free_fds = &g_cvfds.cvfds[GRPC_FD_TO_IDX(fd_info->read_fd)];
   gpr_mu_unlock(&g_cvfds.mu);
 }
 
diff --git a/src/core/lib/iomgr/wakeup_fd_cv.h b/src/core/lib/iomgr/wakeup_fd_cv.h
index 46e84f5843..dc170ad5b4 100644
--- a/src/core/lib/iomgr/wakeup_fd_cv.h
+++ b/src/core/lib/iomgr/wakeup_fd_cv.h
@@ -37,8 +37,8 @@
 
 #include "src/core/lib/iomgr/ev_posix.h"
 
-#define FD_TO_IDX(fd) (-(fd)-1)
-#define IDX_TO_FD(idx) (-(idx)-1)
+#define GRPC_FD_TO_IDX(fd) (-(fd)-1)
+#define GRPC_IDX_TO_FD(idx) (-(idx)-1)
 
 typedef struct cv_node {
   gpr_cv* cv;
diff --git a/src/core/lib/security/credentials/google_default/google_default_credentials.c b/src/core/lib/security/credentials/google_default/google_default_credentials.c
index a2a8e289ee..691d66df69 100644
--- a/src/core/lib/security/credentials/google_default/google_default_credentials.c
+++ b/src/core/lib/security/credentials/google_default/google_default_credentials.c
@@ -79,7 +79,8 @@ 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(grpc_polling_entity_pollset(&detector->pollent), NULL));
+      grpc_pollset_kick(exec_ctx,
+                        grpc_polling_entity_pollset(&detector->pollent), NULL));
   gpr_mu_unlock(g_polling_mu);
 }
 
diff --git a/src/core/lib/security/transport/security_connector.c b/src/core/lib/security/transport/security_connector.c
index a7568b995f..2a9e939d40 100644
--- a/src/core/lib/security/transport/security_connector.c
+++ b/src/core/lib/security/transport/security_connector.c
@@ -455,14 +455,14 @@ grpc_server_security_connector *grpc_fake_server_security_connector_create(
 
 typedef struct {
   grpc_channel_security_connector base;
-  tsi_ssl_client_handshaker_factory *handshaker_factory;
+  tsi_ssl_client_handshaker_factory *client_handshaker_factory;
   char *target_name;
   char *overridden_target_name;
 } grpc_ssl_channel_security_connector;
 
 typedef struct {
   grpc_server_security_connector base;
-  tsi_ssl_server_handshaker_factory *handshaker_factory;
+  tsi_ssl_server_handshaker_factory *server_handshaker_factory;
 } grpc_ssl_server_security_connector;
 
 static void ssl_channel_destroy(grpc_exec_ctx *exec_ctx,
@@ -470,9 +470,8 @@ static void ssl_channel_destroy(grpc_exec_ctx *exec_ctx,
   grpc_ssl_channel_security_connector *c =
       (grpc_ssl_channel_security_connector *)sc;
   grpc_call_credentials_unref(exec_ctx, c->base.request_metadata_creds);
-  if (c->handshaker_factory != NULL) {
-    tsi_ssl_client_handshaker_factory_destroy(c->handshaker_factory);
-  }
+  tsi_ssl_client_handshaker_factory_unref(c->client_handshaker_factory);
+  c->client_handshaker_factory = NULL;
   if (c->target_name != NULL) gpr_free(c->target_name);
   if (c->overridden_target_name != NULL) gpr_free(c->overridden_target_name);
   gpr_free(sc);
@@ -482,9 +481,8 @@ static void ssl_server_destroy(grpc_exec_ctx *exec_ctx,
                                grpc_security_connector *sc) {
   grpc_ssl_server_security_connector *c =
       (grpc_ssl_server_security_connector *)sc;
-  if (c->handshaker_factory != NULL) {
-    tsi_ssl_server_handshaker_factory_destroy(c->handshaker_factory);
-  }
+  tsi_ssl_server_handshaker_factory_unref(c->server_handshaker_factory);
+  c->server_handshaker_factory = NULL;
   gpr_free(sc);
 }
 
@@ -496,7 +494,7 @@ static void ssl_channel_add_handshakers(grpc_exec_ctx *exec_ctx,
   // Instantiate TSI handshaker.
   tsi_handshaker *tsi_hs = NULL;
   tsi_result result = tsi_ssl_client_handshaker_factory_create_handshaker(
-      c->handshaker_factory,
+      c->client_handshaker_factory,
       c->overridden_target_name != NULL ? c->overridden_target_name
                                         : c->target_name,
       &tsi_hs);
@@ -521,7 +519,7 @@ static void ssl_server_add_handshakers(grpc_exec_ctx *exec_ctx,
   // Instantiate TSI handshaker.
   tsi_handshaker *tsi_hs = NULL;
   tsi_result result = tsi_ssl_server_handshaker_factory_create_handshaker(
-      c->handshaker_factory, &tsi_hs);
+      c->server_handshaker_factory, &tsi_hs);
   if (result != TSI_OK) {
     gpr_log(GPR_ERROR, "Handshaker creation failed with error %s.",
             tsi_result_to_string(result));
@@ -852,7 +850,7 @@ grpc_security_status grpc_ssl_channel_security_connector_create(
   result = tsi_create_ssl_client_handshaker_factory(
       has_key_cert_pair ? &config->pem_key_cert_pair : NULL, pem_root_certs,
       ssl_cipher_suites(), alpn_protocol_strings, (uint16_t)num_alpn_protocols,
-      &c->handshaker_factory);
+      &c->client_handshaker_factory);
   if (result != TSI_OK) {
     gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.",
             tsi_result_to_string(result));
@@ -897,7 +895,7 @@ grpc_security_status grpc_ssl_server_security_connector_create(
       config->pem_root_certs, get_tsi_client_certificate_request_type(
                                   config->client_certificate_request),
       ssl_cipher_suites(), alpn_protocol_strings, (uint16_t)num_alpn_protocols,
-      &c->handshaker_factory);
+      &c->server_handshaker_factory);
   if (result != TSI_OK) {
     gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.",
             tsi_result_to_string(result));
diff --git a/src/core/lib/security/transport/security_handshaker.c b/src/core/lib/security/transport/security_handshaker.c
index 975d599523..3d19605617 100644
--- a/src/core/lib/security/transport/security_handshaker.c
+++ b/src/core/lib/security/transport/security_handshaker.c
@@ -137,7 +137,7 @@ static void on_peer_checked_inner(grpc_exec_ctx *exec_ctx,
   // Create zero-copy frame protector, if implemented.
   tsi_zero_copy_grpc_protector *zero_copy_protector = NULL;
   tsi_result result = tsi_handshaker_result_create_zero_copy_grpc_protector(
-      h->handshaker_result, NULL, &zero_copy_protector);
+      exec_ctx, h->handshaker_result, NULL, &zero_copy_protector);
   if (result != TSI_OK && result != TSI_UNIMPLEMENTED) {
     error = grpc_set_tsi_error_result(
         GRPC_ERROR_CREATE_FROM_STATIC_STRING(
diff --git a/src/core/lib/slice/slice.c b/src/core/lib/slice/slice.c
index 321a21a10b..0764eda052 100644
--- a/src/core/lib/slice/slice.c
+++ b/src/core/lib/slice/slice.c
@@ -174,8 +174,8 @@ static const grpc_slice_refcount_vtable new_with_len_vtable = {
 grpc_slice grpc_slice_new_with_len(void *p, size_t len,
                                    void (*destroy)(void *, size_t)) {
   grpc_slice slice;
-  new_with_len_slice_refcount *rc =
-      gpr_malloc(sizeof(new_with_len_slice_refcount));
+  new_with_len_slice_refcount *rc = (new_with_len_slice_refcount *)gpr_malloc(
+      sizeof(new_with_len_slice_refcount));
   gpr_ref_init(&rc->refs, 1);
   rc->rc.vtable = &new_with_len_vtable;
   rc->rc.sub_refcount = &rc->rc;
diff --git a/src/core/lib/support/log_linux.c b/src/core/lib/support/log_linux.c
index 61d2346427..7755018693 100644
--- a/src/core/lib/support/log_linux.c
+++ b/src/core/lib/support/log_linux.c
@@ -57,7 +57,7 @@ void gpr_log(const char *file, int line, gpr_log_severity severity,
 }
 
 void gpr_default_log(gpr_log_func_args *args) {
-  char *final_slash;
+  const char *final_slash;
   char *prefix;
   const char *display_file;
   char time_buffer[64];
diff --git a/src/core/lib/support/string.c b/src/core/lib/support/string.c
index 523e43445b..6b172df82f 100644
--- a/src/core/lib/support/string.c
+++ b/src/core/lib/support/string.c
@@ -276,7 +276,7 @@ static void add_string_to_split(const char *beg, const char *end, char ***strs,
 
 void gpr_string_split(const char *input, const char *sep, char ***strs,
                       size_t *nstrs) {
-  char *next;
+  const char *next;
   *strs = NULL;
   *nstrs = 0;
   size_t capstrs = 0;
diff --git a/src/core/lib/surface/call.c b/src/core/lib/surface/call.c
index d4c2568c51..7bc49ce1a3 100644
--- a/src/core/lib/surface/call.c
+++ b/src/core/lib/surface/call.c
@@ -158,7 +158,7 @@ struct grpc_call {
   grpc_channel *channel;
   gpr_timespec start_time;
   /* parent_call* */ gpr_atm parent_call_atm;
-  child_call *child_call;
+  child_call *child;
 
   /* client or server call */
   bool is_client;
@@ -293,11 +293,11 @@ 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 add_init_error(grpc_error **composite, grpc_error *new) {
-  if (new == GRPC_ERROR_NONE) return;
+static void add_init_error(grpc_error **composite, grpc_error *new_err) {
+  if (new_err == GRPC_ERROR_NONE) return;
   if (*composite == GRPC_ERROR_NONE)
     *composite = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Call creation failed");
-  *composite = grpc_error_add_child(*composite, new);
+  *composite = grpc_error_add_child(*composite, new_err);
 }
 
 void *grpc_call_arena_alloc(grpc_call *call, size_t size) {
@@ -330,8 +330,9 @@ grpc_error *grpc_call_create(grpc_exec_ctx *exec_ctx,
       grpc_channel_get_channel_stack(args->channel);
   grpc_call *call;
   GPR_TIMER_BEGIN("grpc_call_create", 0);
-  gpr_arena *arena =
-      gpr_arena_create(grpc_channel_get_call_size_estimate(args->channel));
+  size_t initial_size = grpc_channel_get_call_size_estimate(args->channel);
+  GRPC_STATS_INC_CALL_INITIAL_SIZE(exec_ctx, 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);
   gpr_ref_init(&call->ext_ref, 1);
@@ -377,24 +378,24 @@ grpc_error *grpc_call_create(grpc_exec_ctx *exec_ctx,
 
   bool immediately_cancel = false;
 
-  if (args->parent_call != NULL) {
-    child_call *cc = call->child_call =
-        gpr_arena_alloc(arena, sizeof(child_call));
-    call->child_call->parent = args->parent_call;
+  if (args->parent != NULL) {
+    child_call *cc = call->child =
+        (child_call *)gpr_arena_alloc(arena, sizeof(child_call));
+    call->child->parent = args->parent;
 
-    GRPC_CALL_INTERNAL_REF(args->parent_call, "child");
+    GRPC_CALL_INTERNAL_REF(args->parent, "child");
     GPR_ASSERT(call->is_client);
-    GPR_ASSERT(!args->parent_call->is_client);
+    GPR_ASSERT(!args->parent->is_client);
 
-    parent_call *pc = get_or_create_parent_call(args->parent_call);
+    parent_call *pc = get_or_create_parent_call(args->parent);
 
     gpr_mu_lock(&pc->child_list_mu);
 
     if (args->propagation_mask & GRPC_PROPAGATE_DEADLINE) {
       send_deadline = gpr_time_min(
           gpr_convert_clock_type(send_deadline,
-                                 args->parent_call->send_deadline.clock_type),
-          args->parent_call->send_deadline);
+                                 args->parent->send_deadline.clock_type),
+          args->parent->send_deadline);
     }
     /* for now GRPC_PROPAGATE_TRACING_CONTEXT *MUST* be passed with
      * GRPC_PROPAGATE_STATS_CONTEXT */
@@ -406,9 +407,9 @@ grpc_error *grpc_call_create(grpc_exec_ctx *exec_ctx,
                                    "Census tracing propagation requested "
                                    "without Census context propagation"));
       }
-      grpc_call_context_set(
-          call, GRPC_CONTEXT_TRACING,
-          args->parent_call->context[GRPC_CONTEXT_TRACING].value, NULL);
+      grpc_call_context_set(call, GRPC_CONTEXT_TRACING,
+                            args->parent->context[GRPC_CONTEXT_TRACING].value,
+                            NULL);
     } else if (args->propagation_mask & GRPC_PROPAGATE_CENSUS_STATS_CONTEXT) {
       add_init_error(&error, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                                  "Census context propagation requested "
@@ -416,7 +417,7 @@ grpc_error *grpc_call_create(grpc_exec_ctx *exec_ctx,
     }
     if (args->propagation_mask & GRPC_PROPAGATE_CANCELLATION) {
       call->cancellation_is_inherited = 1;
-      if (gpr_atm_acq_load(&args->parent_call->received_final_op_atm)) {
+      if (gpr_atm_acq_load(&args->parent->received_final_op_atm)) {
         immediately_cancel = true;
       }
     }
@@ -426,9 +427,9 @@ grpc_error *grpc_call_create(grpc_exec_ctx *exec_ctx,
       cc->sibling_next = cc->sibling_prev = call;
     } else {
       cc->sibling_next = pc->first_child;
-      cc->sibling_prev = pc->first_child->child_call->sibling_prev;
-      cc->sibling_next->child_call->sibling_prev =
-          cc->sibling_prev->child_call->sibling_next = call;
+      cc->sibling_prev = pc->first_child->child->sibling_prev;
+      cc->sibling_next->child->sibling_prev =
+          cc->sibling_prev->child->sibling_next = call;
     }
 
     gpr_mu_unlock(&pc->child_list_mu);
@@ -549,7 +550,7 @@ static void destroy_call(grpc_exec_ctx *exec_ctx, void *call,
     GRPC_CQ_INTERNAL_UNREF(exec_ctx, c->cq, "bind");
   }
 
-  get_final_status(call, set_status_value_directly, &c->final_info.final_status,
+  get_final_status(c, set_status_value_directly, &c->final_info.final_status,
                    NULL);
   c->final_info.stats.latency =
       gpr_time_sub(gpr_now(GPR_CLOCK_MONOTONIC), c->start_time);
@@ -570,7 +571,7 @@ void grpc_call_ref(grpc_call *c) { gpr_ref(&c->ext_ref); }
 void grpc_call_unref(grpc_call *c) {
   if (!gpr_unref(&c->ext_ref)) return;
 
-  child_call *cc = c->child_call;
+  child_call *cc = c->child;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   GPR_TIMER_BEGIN("grpc_call_unref", 0);
@@ -585,8 +586,8 @@ void grpc_call_unref(grpc_call *c) {
         pc->first_child = NULL;
       }
     }
-    cc->sibling_prev->child_call->sibling_next = cc->sibling_next;
-    cc->sibling_next->child_call->sibling_prev = cc->sibling_prev;
+    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");
   }
@@ -1271,7 +1272,7 @@ static void post_batch_completion(grpc_exec_ctx *exec_ctx,
       child = pc->first_child;
       if (child != NULL) {
         do {
-          next_child_call = child->child_call->sibling_next;
+          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,
@@ -1300,7 +1301,8 @@ static void post_batch_completion(grpc_exec_ctx *exec_ctx,
   if (bctl->completion_data.notify_tag.is_closure) {
     /* unrefs bctl->error */
     bctl->call = NULL;
-    GRPC_CLOSURE_RUN(exec_ctx, bctl->completion_data.notify_tag.tag, error);
+    GRPC_CLOSURE_RUN(
+        exec_ctx, (grpc_closure *)bctl->completion_data.notify_tag.tag, error);
     GRPC_CALL_INTERNAL_UNREF(exec_ctx, call, "completion");
   } else {
     /* unrefs bctl->error */
@@ -1432,7 +1434,7 @@ static void receiving_stream_ready(grpc_exec_ctx *exec_ctx, void *bctlp,
    * acq_load is in receiving_initial_metadata_ready() */
   if (error != GRPC_ERROR_NONE || call->receiving_stream == NULL ||
       !gpr_atm_rel_cas(&call->recv_state, RECV_NONE, (gpr_atm)bctlp)) {
-    process_data_after_md(exec_ctx, bctlp);
+    process_data_after_md(exec_ctx, bctl);
   }
 }
 
@@ -1491,7 +1493,7 @@ static void validate_filtered_metadata(grpc_exec_ctx *exec_ctx,
     } else if (grpc_compression_options_is_algorithm_enabled(
                    &compression_options, compression_algorithm) == 0) {
       /* check if algorithm is supported by current channel config */
-      char *algo_name = NULL;
+      const char *algo_name = NULL;
       grpc_compression_algorithm_name(compression_algorithm, &algo_name);
       gpr_asprintf(&error_msg, "Compression algorithm '%s' is disabled.",
                    algo_name);
@@ -1504,7 +1506,7 @@ static void validate_filtered_metadata(grpc_exec_ctx *exec_ctx,
     GPR_ASSERT(call->encodings_accepted_by_peer != 0);
     if (!GPR_BITGET(call->encodings_accepted_by_peer, compression_algorithm)) {
       if (GRPC_TRACER_ON(grpc_compression_trace)) {
-        char *algo_name = NULL;
+        const char *algo_name = NULL;
         grpc_compression_algorithm_name(compression_algorithm, &algo_name);
         gpr_log(GPR_ERROR,
                 "Compression algorithm ('%s') not present in the bitset of "
@@ -1607,6 +1609,8 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
   batch_control *bctl;
   int num_completion_callbacks_needed = 1;
   grpc_call_error error = GRPC_CALL_OK;
+  grpc_transport_stream_op_batch *stream_op;
+  grpc_transport_stream_op_batch_payload *stream_op_payload;
 
   GPR_TIMER_BEGIN("grpc_call_start_batch", 0);
   GRPC_CALL_LOG_BATCH(GPR_INFO, call, ops, nops, notify_tag);
@@ -1614,11 +1618,12 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
   if (nops == 0) {
     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, NULL,
-                     gpr_malloc(sizeof(grpc_cq_completion)));
+      grpc_cq_end_op(
+          exec_ctx, call->cq, notify_tag, GRPC_ERROR_NONE,
+          free_no_op_completion, NULL,
+          (grpc_cq_completion *)gpr_malloc(sizeof(grpc_cq_completion)));
     } else {
-      GRPC_CLOSURE_SCHED(exec_ctx, notify_tag, GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(exec_ctx, (grpc_closure *)notify_tag, GRPC_ERROR_NONE);
     }
     error = GRPC_CALL_OK;
     goto done;
@@ -1632,9 +1637,8 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
   bctl->completion_data.notify_tag.is_closure =
       (uint8_t)(is_notify_tag_closure != 0);
 
-  grpc_transport_stream_op_batch *stream_op = &bctl->op;
-  grpc_transport_stream_op_batch_payload *stream_op_payload =
-      &call->stream_op_payload;
+  stream_op = &bctl->op;
+  stream_op_payload = &call->stream_op_payload;
 
   /* rewrite batch ops into a transport op */
   for (i = 0; i < nops; i++) {
@@ -1644,7 +1648,7 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
       goto done_with_error;
     }
     switch (op->op) {
-      case GRPC_OP_SEND_INITIAL_METADATA:
+      case GRPC_OP_SEND_INITIAL_METADATA: {
         /* Flag validation: currently allow no flags */
         if (!are_initial_metadata_flags_valid(op->flags, call->is_client)) {
           error = GRPC_CALL_ERROR_INVALID_FLAGS;
@@ -1710,7 +1714,8 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
               &call->peer_string;
         }
         break;
-      case GRPC_OP_SEND_MESSAGE:
+      }
+      case GRPC_OP_SEND_MESSAGE: {
         if (!are_write_flags_valid(op->flags)) {
           error = GRPC_CALL_ERROR_INVALID_FLAGS;
           goto done_with_error;
@@ -1739,7 +1744,8 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
         stream_op_payload->send_message.send_message =
             &call->sending_stream.base;
         break;
-      case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
+      }
+      case GRPC_OP_SEND_CLOSE_FROM_CLIENT: {
         /* Flag validation: currently allow no flags */
         if (op->flags != 0) {
           error = GRPC_CALL_ERROR_INVALID_FLAGS;
@@ -1758,7 +1764,8 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
         stream_op_payload->send_trailing_metadata.send_trailing_metadata =
             &call->metadata_batch[0 /* is_receiving */][1 /* is_trailing */];
         break;
-      case GRPC_OP_SEND_STATUS_FROM_SERVER:
+      }
+      case GRPC_OP_SEND_STATUS_FROM_SERVER: {
         /* Flag validation: currently allow no flags */
         if (op->flags != 0) {
           error = GRPC_CALL_ERROR_INVALID_FLAGS;
@@ -1820,7 +1827,8 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
         stream_op_payload->send_trailing_metadata.send_trailing_metadata =
             &call->metadata_batch[0 /* is_receiving */][1 /* is_trailing */];
         break;
-      case GRPC_OP_RECV_INITIAL_METADATA:
+      }
+      case GRPC_OP_RECV_INITIAL_METADATA: {
         /* Flag validation: currently allow no flags */
         if (op->flags != 0) {
           error = GRPC_CALL_ERROR_INVALID_FLAGS;
@@ -1847,7 +1855,8 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
         }
         num_completion_callbacks_needed++;
         break;
-      case GRPC_OP_RECV_MESSAGE:
+      }
+      case GRPC_OP_RECV_MESSAGE: {
         /* Flag validation: currently allow no flags */
         if (op->flags != 0) {
           error = GRPC_CALL_ERROR_INVALID_FLAGS;
@@ -1868,7 +1877,8 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
             &call->receiving_stream_ready;
         num_completion_callbacks_needed++;
         break;
-      case GRPC_OP_RECV_STATUS_ON_CLIENT:
+      }
+      case GRPC_OP_RECV_STATUS_ON_CLIENT: {
         /* Flag validation: currently allow no flags */
         if (op->flags != 0) {
           error = GRPC_CALL_ERROR_INVALID_FLAGS;
@@ -1895,7 +1905,8 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
         stream_op_payload->collect_stats.collect_stats =
             &call->final_info.stats.transport_stream_stats;
         break;
-      case GRPC_OP_RECV_CLOSE_ON_SERVER:
+      }
+      case GRPC_OP_RECV_CLOSE_ON_SERVER: {
         /* Flag validation: currently allow no flags */
         if (op->flags != 0) {
           error = GRPC_CALL_ERROR_INVALID_FLAGS;
@@ -1919,6 +1930,7 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
         stream_op_payload->collect_stats.collect_stats =
             &call->final_info.stats.transport_stream_stats;
         break;
+      }
     }
   }
 
diff --git a/src/core/lib/surface/call.h b/src/core/lib/surface/call.h
index d537637cbb..c680139cf6 100644
--- a/src/core/lib/surface/call.h
+++ b/src/core/lib/surface/call.h
@@ -37,7 +37,7 @@ typedef void (*grpc_ioreq_completion_func)(grpc_exec_ctx *exec_ctx,
 typedef struct grpc_call_create_args {
   grpc_channel *channel;
 
-  grpc_call *parent_call;
+  grpc_call *parent;
   uint32_t propagation_mask;
 
   grpc_completion_queue *cq;
diff --git a/src/core/lib/surface/channel.c b/src/core/lib/surface/channel.c
index 15506e6524..fc7d745463 100644
--- a/src/core/lib/surface/channel.c
+++ b/src/core/lib/surface/channel.c
@@ -27,6 +27,7 @@
 #include <grpc/support/string_util.h>
 
 #include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/debug/stats.h"
 #include "src/core/lib/iomgr/iomgr.h"
 #include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/support/string.h"
@@ -77,6 +78,11 @@ grpc_channel *grpc_channel_create_with_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);
+  } else {
+    GRPC_STATS_INC_CLIENT_CHANNELS_CREATED(exec_ctx);
+  }
   grpc_error *error = grpc_channel_stack_builder_finish(
       exec_ctx, builder, sizeof(grpc_channel), 1, destroy_channel, NULL,
       (void **)&channel);
@@ -247,7 +253,7 @@ static grpc_call *grpc_channel_create_call_internal(
   grpc_call_create_args args;
   memset(&args, 0, sizeof(args));
   args.channel = channel;
-  args.parent_call = parent_call;
+  args.parent = parent_call;
   args.propagation_mask = propagation_mask;
   args.cq = cq;
   args.pollset_set_alternative = pollset_set_alternative;
diff --git a/src/core/lib/surface/completion_queue.c b/src/core/lib/surface/completion_queue.c
index 4726503994..fed66e3a20 100644
--- a/src/core/lib/surface/completion_queue.c
+++ b/src/core/lib/surface/completion_queue.c
@@ -26,6 +26,7 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/time.h>
 
+#include "src/core/lib/debug/stats.h"
 #include "src/core/lib/iomgr/pollset.h"
 #include "src/core/lib/iomgr/timer.h"
 #include "src/core/lib/profiling/timers.h"
@@ -54,7 +55,7 @@ typedef struct {
   bool can_listen;
   size_t (*size)(void);
   void (*init)(grpc_pollset *pollset, gpr_mu **mu);
-  grpc_error *(*kick)(grpc_pollset *pollset,
+  grpc_error *(*kick)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                       grpc_pollset_worker *specific_worker);
   grpc_error *(*work)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                       grpc_pollset_worker **worker, gpr_timespec now,
@@ -130,7 +131,8 @@ static grpc_error *non_polling_poller_work(grpc_exec_ctx *exec_ctx,
 }
 
 static grpc_error *non_polling_poller_kick(
-    grpc_pollset *pollset, grpc_pollset_worker *specific_worker) {
+    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+    grpc_pollset_worker *specific_worker) {
   non_polling_poller *p = (non_polling_poller *)pollset;
   if (specific_worker == NULL) specific_worker = (grpc_pollset_worker *)p->root;
   if (specific_worker != NULL) {
@@ -327,25 +329,12 @@ static void cq_destroy_pluck(void *data);
 /* Completion queue vtables based on the completion-type */
 static const cq_vtable g_cq_vtable[] = {
     /* GRPC_CQ_NEXT */
-    {.data_size = sizeof(cq_next_data),
-     .cq_completion_type = GRPC_CQ_NEXT,
-     .init = cq_init_next,
-     .shutdown = cq_shutdown_next,
-     .destroy = cq_destroy_next,
-     .begin_op = cq_begin_op_for_next,
-     .end_op = cq_end_op_for_next,
-     .next = cq_next,
-     .pluck = NULL},
+    {GRPC_CQ_NEXT, sizeof(cq_next_data), cq_init_next, cq_shutdown_next,
+     cq_destroy_next, cq_begin_op_for_next, cq_end_op_for_next, cq_next, NULL},
     /* GRPC_CQ_PLUCK */
-    {.data_size = sizeof(cq_pluck_data),
-     .cq_completion_type = GRPC_CQ_PLUCK,
-     .init = cq_init_pluck,
-     .shutdown = cq_shutdown_pluck,
-     .destroy = cq_destroy_pluck,
-     .begin_op = cq_begin_op_for_pluck,
-     .end_op = cq_end_op_for_pluck,
-     .next = NULL,
-     .pluck = cq_pluck},
+    {GRPC_CQ_PLUCK, sizeof(cq_pluck_data), cq_init_pluck, cq_shutdown_pluck,
+     cq_destroy_pluck, cq_begin_op_for_pluck, cq_end_op_for_pluck, NULL,
+     cq_pluck},
 };
 
 #define DATA_FROM_CQ(cq) ((void *)(cq + 1))
@@ -420,6 +409,10 @@ 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);
+
   cq = (grpc_completion_queue *)gpr_zalloc(sizeof(grpc_completion_queue) +
                                            vtable->data_size +
                                            poller_vtable->size());
@@ -560,13 +553,13 @@ static void cq_check_tag(grpc_completion_queue *cq, void *tag, bool lock_cq) {}
  * true if the increment was successful; false if the counter is zero */
 static bool atm_inc_if_nonzero(gpr_atm *counter) {
   while (true) {
-    gpr_atm count = gpr_atm_no_barrier_load(counter);
+    gpr_atm count = gpr_atm_acq_load(counter);
     /* If zero, we are done. If not, we must to a CAS (instead of an atomic
      * increment) to maintain the contract: do not increment the counter if it
      * is zero. */
     if (count == 0) {
       return false;
-    } else if (gpr_atm_no_barrier_cas(counter, count, count + 1)) {
+    } else if (gpr_atm_full_cas(counter, count, count + 1)) {
       break;
     }
   }
@@ -575,12 +568,12 @@ static bool atm_inc_if_nonzero(gpr_atm *counter) {
 }
 
 static bool cq_begin_op_for_next(grpc_completion_queue *cq, void *tag) {
-  cq_next_data *cqd = DATA_FROM_CQ(cq);
+  cq_next_data *cqd = (cq_next_data *)DATA_FROM_CQ(cq);
   return atm_inc_if_nonzero(&cqd->pending_events);
 }
 
 static bool cq_begin_op_for_pluck(grpc_completion_queue *cq, void *tag) {
-  cq_pluck_data *cqd = DATA_FROM_CQ(cq);
+  cq_pluck_data *cqd = (cq_pluck_data *)DATA_FROM_CQ(cq);
   return atm_inc_if_nonzero(&cqd->pending_events);
 }
 
@@ -625,7 +618,7 @@ static void cq_end_op_for_next(grpc_exec_ctx *exec_ctx,
     }
   }
 
-  cq_next_data *cqd = DATA_FROM_CQ(cq);
+  cq_next_data *cqd = (cq_next_data *)DATA_FROM_CQ(cq);
   int is_success = (error == GRPC_ERROR_NONE);
 
   storage->tag = tag;
@@ -638,15 +631,19 @@ static void cq_end_op_for_next(grpc_exec_ctx *exec_ctx,
   /* Add the completion to the queue */
   bool is_first = cq_event_queue_push(&cqd->queue, storage);
   gpr_atm_no_barrier_fetch_add(&cqd->things_queued_ever, 1);
-  bool will_definitely_shutdown =
-      gpr_atm_no_barrier_load(&cqd->pending_events) == 1;
+
+  /* Since we do not hold the cq lock here, it is important to do an 'acquire'
+     load here (instead of a 'no_barrier' load) to match with the release store
+     (done via gpr_atm_full_fetch_add(pending_events, -1)) in cq_shutdown_next
+     */
+  bool will_definitely_shutdown = gpr_atm_acq_load(&cqd->pending_events) == 1;
 
   if (!will_definitely_shutdown) {
     /* Only kick if this is the first item queued */
     if (is_first) {
       gpr_mu_lock(cq->mu);
       grpc_error *kick_error =
-          cq->poller_vtable->kick(POLLSET_FROM_CQ(cq), NULL);
+          cq->poller_vtable->kick(exec_ctx, POLLSET_FROM_CQ(cq), NULL);
       gpr_mu_unlock(cq->mu);
 
       if (kick_error != GRPC_ERROR_NONE) {
@@ -686,7 +683,7 @@ static void cq_end_op_for_pluck(grpc_exec_ctx *exec_ctx,
                                              void *done_arg,
                                              grpc_cq_completion *storage),
                                 void *done_arg, grpc_cq_completion *storage) {
-  cq_pluck_data *cqd = DATA_FROM_CQ(cq);
+  cq_pluck_data *cqd = (cq_pluck_data *)DATA_FROM_CQ(cq);
   int is_success = (error == GRPC_ERROR_NONE);
 
   GPR_TIMER_BEGIN("cq_end_op_for_pluck", 0);
@@ -732,7 +729,7 @@ static void cq_end_op_for_pluck(grpc_exec_ctx *exec_ctx,
     }
 
     grpc_error *kick_error =
-        cq->poller_vtable->kick(POLLSET_FROM_CQ(cq), pluck_worker);
+        cq->poller_vtable->kick(exec_ctx, POLLSET_FROM_CQ(cq), pluck_worker);
 
     gpr_mu_unlock(cq->mu);
 
@@ -769,7 +766,7 @@ typedef struct {
 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 = DATA_FROM_CQ(cq);
+  cq_next_data *cqd = (cq_next_data *)DATA_FROM_CQ(cq);
   GPR_ASSERT(a->stolen_completion == NULL);
 
   gpr_atm current_last_seen_things_queued_ever =
@@ -820,7 +817,7 @@ static grpc_event cq_next(grpc_completion_queue *cq, gpr_timespec deadline,
                           void *reserved) {
   grpc_event ret;
   gpr_timespec now;
-  cq_next_data *cqd = DATA_FROM_CQ(cq);
+  cq_next_data *cqd = (cq_next_data *)DATA_FROM_CQ(cq);
 
   GPR_TIMER_BEGIN("grpc_completion_queue_next", 0);
 
@@ -883,7 +880,7 @@ static grpc_event cq_next(grpc_completion_queue *cq, gpr_timespec deadline,
       }
     }
 
-    if (gpr_atm_no_barrier_load(&cqd->pending_events) == 0) {
+    if (gpr_atm_acq_load(&cqd->pending_events) == 0) {
       /* Before returning, check if the queue has any items left over (since
          gpr_mpscq_pop() can sometimes return NULL even if the queue is not
          empty. If so, keep retrying but do not return GRPC_QUEUE_SHUTDOWN */
@@ -929,9 +926,9 @@ static grpc_event cq_next(grpc_completion_queue *cq, gpr_timespec deadline,
   }
 
   if (cq_event_queue_num_items(&cqd->queue) > 0 &&
-      gpr_atm_no_barrier_load(&cqd->pending_events) > 0) {
+      gpr_atm_acq_load(&cqd->pending_events) > 0) {
     gpr_mu_lock(cq->mu);
-    cq->poller_vtable->kick(POLLSET_FROM_CQ(cq), NULL);
+    cq->poller_vtable->kick(&exec_ctx, POLLSET_FROM_CQ(cq), NULL);
     gpr_mu_unlock(cq->mu);
   }
 
@@ -953,7 +950,7 @@ static grpc_event cq_next(grpc_completion_queue *cq, gpr_timespec deadline,
    this function */
 static void cq_finish_shutdown_next(grpc_exec_ctx *exec_ctx,
                                     grpc_completion_queue *cq) {
-  cq_next_data *cqd = DATA_FROM_CQ(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);
@@ -964,7 +961,7 @@ static void cq_finish_shutdown_next(grpc_exec_ctx *exec_ctx,
 
 static void cq_shutdown_next(grpc_exec_ctx *exec_ctx,
                              grpc_completion_queue *cq) {
-  cq_next_data *cqd = DATA_FROM_CQ(cq);
+  cq_next_data *cqd = (cq_next_data *)DATA_FROM_CQ(cq);
 
   /* Need an extra ref for cq here because:
    * We call cq_finish_shutdown_next() below, that would call pollset shutdown.
@@ -980,6 +977,9 @@ static void cq_shutdown_next(grpc_exec_ctx *exec_ctx,
     return;
   }
   cqd->shutdown_called = true;
+  /* Doing a full_fetch_add (i.e acq/release) here to match with
+   * 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);
   }
@@ -994,7 +994,7 @@ grpc_event grpc_completion_queue_next(grpc_completion_queue *cq,
 
 static int add_plucker(grpc_completion_queue *cq, void *tag,
                        grpc_pollset_worker **worker) {
-  cq_pluck_data *cqd = DATA_FROM_CQ(cq);
+  cq_pluck_data *cqd = (cq_pluck_data *)DATA_FROM_CQ(cq);
   if (cqd->num_pluckers == GRPC_MAX_COMPLETION_QUEUE_PLUCKERS) {
     return 0;
   }
@@ -1006,7 +1006,7 @@ static int add_plucker(grpc_completion_queue *cq, void *tag,
 
 static void del_plucker(grpc_completion_queue *cq, void *tag,
                         grpc_pollset_worker **worker) {
-  cq_pluck_data *cqd = DATA_FROM_CQ(cq);
+  cq_pluck_data *cqd = (cq_pluck_data *)DATA_FROM_CQ(cq);
   for (int i = 0; i < cqd->num_pluckers; i++) {
     if (cqd->pluckers[i].tag == tag && cqd->pluckers[i].worker == worker) {
       cqd->num_pluckers--;
@@ -1020,7 +1020,7 @@ static void del_plucker(grpc_completion_queue *cq, void *tag,
 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 = DATA_FROM_CQ(cq);
+  cq_pluck_data *cqd = (cq_pluck_data *)DATA_FROM_CQ(cq);
 
   GPR_ASSERT(a->stolen_completion == NULL);
   gpr_atm current_last_seen_things_queued_ever =
@@ -1057,7 +1057,7 @@ static grpc_event cq_pluck(grpc_completion_queue *cq, void *tag,
   grpc_cq_completion *prev;
   grpc_pollset_worker *worker = NULL;
   gpr_timespec now;
-  cq_pluck_data *cqd = DATA_FROM_CQ(cq);
+  cq_pluck_data *cqd = (cq_pluck_data *)DATA_FROM_CQ(cq);
 
   GPR_TIMER_BEGIN("grpc_completion_queue_pluck", 0);
 
@@ -1181,7 +1181,7 @@ grpc_event grpc_completion_queue_pluck(grpc_completion_queue *cq, void *tag,
 
 static void cq_finish_shutdown_pluck(grpc_exec_ctx *exec_ctx,
                                      grpc_completion_queue *cq) {
-  cq_pluck_data *cqd = DATA_FROM_CQ(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));
@@ -1195,7 +1195,7 @@ static void cq_finish_shutdown_pluck(grpc_exec_ctx *exec_ctx,
  * 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) {
-  cq_pluck_data *cqd = DATA_FROM_CQ(cq);
+  cq_pluck_data *cqd = (cq_pluck_data *)DATA_FROM_CQ(cq);
 
   /* Need an extra ref for cq here because:
    * We call cq_finish_shutdown_pluck() below, that would call pollset shutdown.
diff --git a/src/core/lib/surface/init.c b/src/core/lib/surface/init.c
index 280315036f..b089da2c54 100644
--- a/src/core/lib/surface/init.c
+++ b/src/core/lib/surface/init.c
@@ -36,6 +36,7 @@
 #include "src/core/lib/iomgr/executor.h"
 #include "src/core/lib/iomgr/iomgr.h"
 #include "src/core/lib/iomgr/resource_quota.h"
+#include "src/core/lib/iomgr/timer_manager.h"
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/surface/alarm_internal.h"
@@ -179,14 +180,16 @@ void grpc_shutdown(void) {
       GRPC_EXEC_CTX_INITIALIZER(0, grpc_never_ready_to_finish, NULL);
   gpr_mu_lock(&g_init_mu);
   if (--g_initializations == 0) {
-    grpc_iomgr_shutdown(&exec_ctx);
-    gpr_timers_global_destroy();
-    grpc_tracer_shutdown();
+    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 != NULL) {
         g_all_of_the_plugins[i].destroy();
       }
     }
+    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();
diff --git a/src/core/lib/surface/server.c b/src/core/lib/surface/server.c
index f95cc10a6a..1d0fd472d0 100644
--- a/src/core/lib/surface/server.c
+++ b/src/core/lib/surface/server.c
@@ -29,6 +29,7 @@
 
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/connected_channel.h"
+#include "src/core/lib/debug/stats.h"
 #include "src/core/lib/iomgr/executor.h"
 #include "src/core/lib/iomgr/iomgr.h"
 #include "src/core/lib/slice/slice_internal.h"
@@ -75,7 +76,7 @@ typedef struct requested_call {
       grpc_call_details *details;
     } batch;
     struct {
-      registered_method *registered_method;
+      registered_method *method;
       gpr_timespec *deadline;
       grpc_byte_buffer **optional_payload;
     } registered;
@@ -144,7 +145,7 @@ struct call_data {
   uint32_t recv_initial_metadata_flags;
   grpc_metadata_array initial_metadata;
 
-  request_matcher *request_matcher;
+  request_matcher *matcher;
   grpc_byte_buffer *payload;
 
   grpc_closure got_initial_metadata;
@@ -170,7 +171,7 @@ struct registered_method {
   grpc_server_register_method_payload_handling payload_handling;
   uint32_t flags;
   /* one request matcher per method */
-  request_matcher request_matcher;
+  request_matcher matcher;
   registered_method *next;
 };
 
@@ -333,7 +334,7 @@ static void request_matcher_destroy(request_matcher *rm) {
 
 static void kill_zombie(grpc_exec_ctx *exec_ctx, void *elem,
                         grpc_error *error) {
-  grpc_call_unref(grpc_call_from_top_element(elem));
+  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,
@@ -386,7 +387,7 @@ static void server_delete(grpc_exec_ctx *exec_ctx, grpc_server *server) {
   while ((rm = server->registered_methods) != NULL) {
     server->registered_methods = rm->next;
     if (server->started) {
-      request_matcher_destroy(&rm->request_matcher);
+      request_matcher_destroy(&rm->matcher);
     }
     gpr_free(rm->method);
     gpr_free(rm->host);
@@ -518,7 +519,7 @@ static void publish_new_rpc(grpc_exec_ctx *exec_ctx, void *arg,
   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;
-  request_matcher *rm = calld->request_matcher;
+  request_matcher *rm = calld->matcher;
   grpc_server *server = rm->server;
 
   if (error != GRPC_ERROR_NONE || gpr_atm_acq_load(&server->shutdown_flag)) {
@@ -540,6 +541,7 @@ static void publish_new_rpc(grpc_exec_ctx *exec_ctx, void *arg,
     if (request_id == -1) {
       continue;
     } else {
+      GRPC_STATS_INC_SERVER_CQS_CHECKED(exec_ctx, i);
       gpr_mu_lock(&calld->mu_state);
       calld->state = ACTIVATED;
       gpr_mu_unlock(&calld->mu_state);
@@ -550,6 +552,7 @@ static void publish_new_rpc(grpc_exec_ctx *exec_ctx, void *arg,
   }
 
   /* no cq to take the request found: queue it on the slow list */
+  GRPC_STATS_INC_SERVER_SLOWPATH_REQUESTS_QUEUED(exec_ctx);
   gpr_mu_lock(&server->mu_call);
   gpr_mu_lock(&calld->mu_state);
   calld->state = PENDING;
@@ -580,7 +583,7 @@ static void finish_start_new_rpc(
     return;
   }
 
-  calld->request_matcher = rm;
+  calld->matcher = rm;
 
   switch (payload_handling) {
     case GRPC_SRM_PAYLOAD_NONE:
@@ -626,7 +629,7 @@ static void start_new_rpc(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
         continue;
       }
       finish_start_new_rpc(exec_ctx, server, elem,
-                           &rm->server_registered_method->request_matcher,
+                           &rm->server_registered_method->matcher,
                            rm->server_registered_method->payload_handling);
       return;
     }
@@ -644,7 +647,7 @@ static void start_new_rpc(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
         continue;
       }
       finish_start_new_rpc(exec_ctx, server, elem,
-                           &rm->server_registered_method->request_matcher,
+                           &rm->server_registered_method->matcher,
                            rm->server_registered_method->payload_handling);
       return;
     }
@@ -665,7 +668,7 @@ static int num_listeners(grpc_server *server) {
 
 static void done_shutdown_event(grpc_exec_ctx *exec_ctx, void *server,
                                 grpc_cq_completion *completion) {
-  server_unref(exec_ctx, server);
+  server_unref(exec_ctx, (grpc_server *)server);
 }
 
 static int num_channels(grpc_server *server) {
@@ -688,9 +691,9 @@ static void kill_pending_work_locked(grpc_exec_ctx *exec_ctx,
         exec_ctx, &server->unregistered_request_matcher);
     for (registered_method *rm = server->registered_methods; rm;
          rm = rm->next) {
-      request_matcher_kill_requests(exec_ctx, server, &rm->request_matcher,
+      request_matcher_kill_requests(exec_ctx, server, &rm->matcher,
                                     GRPC_ERROR_REF(error));
-      request_matcher_zombify_all_pending_calls(exec_ctx, &rm->request_matcher);
+      request_matcher_zombify_all_pending_calls(exec_ctx, &rm->matcher);
     }
   }
   GRPC_ERROR_UNREF(error);
@@ -1111,7 +1114,7 @@ void grpc_server_start(grpc_server *server) {
   request_matcher_init(&server->unregistered_request_matcher,
                        (size_t)server->max_requested_calls_per_cq, server);
   for (registered_method *rm = server->registered_methods; rm; rm = rm->next) {
-    request_matcher_init(&rm->request_matcher,
+    request_matcher_init(&rm->matcher,
                          (size_t)server->max_requested_calls_per_cq, server);
   }
 
@@ -1264,8 +1267,9 @@ void grpc_server_shutdown_and_notify(grpc_server *server,
   /* 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,
-                   NULL, gpr_malloc(sizeof(grpc_cq_completion)));
+    grpc_cq_end_op(
+        &exec_ctx, cq, tag, GRPC_ERROR_NONE, done_published_shutdown, NULL,
+        (grpc_cq_completion *)gpr_malloc(sizeof(grpc_cq_completion)));
     gpr_mu_unlock(&server->mu_global);
     goto done;
   }
@@ -1387,7 +1391,7 @@ static grpc_call_error queue_call_request(grpc_exec_ctx *exec_ctx,
       rm = &server->unregistered_request_matcher;
       break;
     case REGISTERED_CALL:
-      rm = &rc->data.registered.registered_method->request_matcher;
+      rm = &rc->data.registered.method->matcher;
       break;
   }
   server->requested_calls_per_cq[cq_idx][request_id] = *rc;
@@ -1432,6 +1436,7 @@ grpc_call_error grpc_server_request_call(
   grpc_call_error error;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   requested_call *rc = (requested_call *)gpr_malloc(sizeof(*rc));
+  GRPC_STATS_INC_SERVER_REQUESTED_CALLS(&exec_ctx);
   GRPC_API_TRACE(
       "grpc_server_request_call("
       "server=%p, call=%p, details=%p, initial_metadata=%p, "
@@ -1478,6 +1483,7 @@ grpc_call_error grpc_server_request_registered_call(
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   requested_call *rc = (requested_call *)gpr_malloc(sizeof(*rc));
   registered_method *rm = (registered_method *)rmp;
+  GRPC_STATS_INC_SERVER_REQUESTED_CALLS(&exec_ctx);
   GRPC_API_TRACE(
       "grpc_server_request_registered_call("
       "server=%p, rmp=%p, call=%p, deadline=%p, initial_metadata=%p, "
@@ -1514,7 +1520,7 @@ grpc_call_error grpc_server_request_registered_call(
   rc->tag = tag;
   rc->cq_bound_to_call = cq_bound_to_call;
   rc->call = call;
-  rc->data.registered.registered_method = rm;
+  rc->data.registered.method = rm;
   rc->data.registered.deadline = deadline;
   rc->initial_metadata = initial_metadata;
   rc->data.registered.optional_payload = optional_payload;
diff --git a/src/core/lib/transport/metadata_batch.c b/src/core/lib/transport/metadata_batch.c
index a077052561..54388bdcda 100644
--- a/src/core/lib/transport/metadata_batch.c
+++ b/src/core/lib/transport/metadata_batch.c
@@ -233,32 +233,32 @@ void grpc_metadata_batch_remove(grpc_exec_ctx *exec_ctx,
 void grpc_metadata_batch_set_value(grpc_exec_ctx *exec_ctx,
                                    grpc_linked_mdelem *storage,
                                    grpc_slice value) {
-  grpc_mdelem old = storage->md;
-  grpc_mdelem new = grpc_mdelem_from_slices(
-      exec_ctx, grpc_slice_ref_internal(GRPC_MDKEY(old)), value);
-  storage->md = new;
-  GRPC_MDELEM_UNREF(exec_ctx, old);
+  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);
+  storage->md = new_mdelem;
+  GRPC_MDELEM_UNREF(exec_ctx, old_mdelem);
 }
 
 grpc_error *grpc_metadata_batch_substitute(grpc_exec_ctx *exec_ctx,
                                            grpc_metadata_batch *batch,
                                            grpc_linked_mdelem *storage,
-                                           grpc_mdelem new) {
+                                           grpc_mdelem new_mdelem) {
   assert_valid_callouts(exec_ctx, batch);
   grpc_error *error = GRPC_ERROR_NONE;
-  grpc_mdelem old = storage->md;
-  if (!grpc_slice_eq(GRPC_MDKEY(new), GRPC_MDKEY(old))) {
+  grpc_mdelem old_mdelem = storage->md;
+  if (!grpc_slice_eq(GRPC_MDKEY(new_mdelem), GRPC_MDKEY(old_mdelem))) {
     maybe_unlink_callout(batch, storage);
-    storage->md = new;
+    storage->md = new_mdelem;
     error = maybe_link_callout(batch, storage);
     if (error != GRPC_ERROR_NONE) {
       unlink_storage(&batch->list, storage);
       GRPC_MDELEM_UNREF(exec_ctx, storage->md);
     }
   } else {
-    storage->md = new;
+    storage->md = new_mdelem;
   }
-  GRPC_MDELEM_UNREF(exec_ctx, old);
+  GRPC_MDELEM_UNREF(exec_ctx, old_mdelem);
   assert_valid_callouts(exec_ctx, batch);
   return error;
 }
@@ -302,12 +302,12 @@ 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 = func(exec_ctx, user_data, l->md);
-    add_error(&error, new.error, composite_error_string);
-    if (GRPC_MDISNULL(new.md)) {
+    grpc_filtered_mdelem new_mdelem = func(exec_ctx, 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);
-    } else if (new.md.payload != l->md.payload) {
-      grpc_metadata_batch_substitute(exec_ctx, batch, l, new.md);
+    } else if (new_mdelem.md.payload != l->md.payload) {
+      grpc_metadata_batch_substitute(exec_ctx, batch, l, new_mdelem.md);
     }
     l = next;
   }
diff --git a/src/core/lib/transport/static_metadata.c b/src/core/lib/transport/static_metadata.c
index 3556ea17c9..1adf00895f 100644
--- a/src/core/lib/transport/static_metadata.c
+++ b/src/core/lib/transport/static_metadata.c
@@ -1,12 +1,12 @@
 /*
  * Copyright 2015 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.
@@ -16,10 +16,10 @@
 
 /*
  * 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
  * an explanation of what's going on.
  */
@@ -28,420 +28,231 @@
 
 #include "src/core/lib/slice/slice_internal.h"
 
-static uint8_t g_bytes[] = {
-    58,  112, 97,  116, 104, 58,  109, 101, 116, 104, 111, 100, 58,  115, 116,
-    97,  116, 117, 115, 58,  97,  117, 116, 104, 111, 114, 105, 116, 121, 58,
-    115, 99,  104, 101, 109, 101, 116, 101, 103, 114, 112, 99,  45,  109, 101,
-    115, 115, 97,  103, 101, 103, 114, 112, 99,  45,  115, 116, 97,  116, 117,
-    115, 103, 114, 112, 99,  45,  112, 97,  121, 108, 111, 97,  100, 45,  98,
-    105, 110, 103, 114, 112, 99,  45,  101, 110, 99,  111, 100, 105, 110, 103,
-    103, 114, 112, 99,  45,  97,  99,  99,  101, 112, 116, 45,  101, 110, 99,
-    111, 100, 105, 110, 103, 103, 114, 112, 99,  45,  115, 101, 114, 118, 101,
-    114, 45,  115, 116, 97,  116, 115, 45,  98,  105, 110, 103, 114, 112, 99,
-    45,  116, 97,  103, 115, 45,  98,  105, 110, 103, 114, 112, 99,  45,  116,
-    114, 97,  99,  101, 45,  98,  105, 110, 99,  111, 110, 116, 101, 110, 116,
-    45,  116, 121, 112, 101, 99,  111, 110, 116, 101, 110, 116, 45,  101, 110,
-    99,  111, 100, 105, 110, 103, 97,  99,  99,  101, 112, 116, 45,  101, 110,
-    99,  111, 100, 105, 110, 103, 103, 114, 112, 99,  45,  105, 110, 116, 101,
-    114, 110, 97,  108, 45,  101, 110, 99,  111, 100, 105, 110, 103, 45,  114,
-    101, 113, 117, 101, 115, 116, 103, 114, 112, 99,  45,  105, 110, 116, 101,
-    114, 110, 97,  108, 45,  115, 116, 114, 101, 97,  109, 45,  101, 110, 99,
-    111, 100, 105, 110, 103, 45,  114, 101, 113, 117, 101, 115, 116, 117, 115,
-    101, 114, 45,  97,  103, 101, 110, 116, 104, 111, 115, 116, 108, 98,  45,
-    116, 111, 107, 101, 110, 103, 114, 112, 99,  45,  116, 105, 109, 101, 111,
-    117, 116, 103, 114, 112, 99,  46,  119, 97,  105, 116, 95,  102, 111, 114,
-    95,  114, 101, 97,  100, 121, 103, 114, 112, 99,  46,  116, 105, 109, 101,
-    111, 117, 116, 103, 114, 112, 99,  46,  109, 97,  120, 95,  114, 101, 113,
-    117, 101, 115, 116, 95,  109, 101, 115, 115, 97,  103, 101, 95,  98,  121,
-    116, 101, 115, 103, 114, 112, 99,  46,  109, 97,  120, 95,  114, 101, 115,
-    112, 111, 110, 115, 101, 95,  109, 101, 115, 115, 97,  103, 101, 95,  98,
-    121, 116, 101, 115, 47,  103, 114, 112, 99,  46,  108, 98,  46,  118, 49,
-    46,  76,  111, 97,  100, 66,  97,  108, 97,  110, 99,  101, 114, 47,  66,
-    97,  108, 97,  110, 99,  101, 76,  111, 97,  100, 109, 101, 115, 115, 97,
-    103, 101, 47,  100, 101, 102, 108, 97,  116, 101, 109, 101, 115, 115, 97,
-    103, 101, 47,  103, 122, 105, 112, 115, 116, 114, 101, 97,  109, 47,  103,
-    122, 105, 112, 48,  49,  50,  105, 100, 101, 110, 116, 105, 116, 121, 103,
-    122, 105, 112, 100, 101, 102, 108, 97,  116, 101, 116, 114, 97,  105, 108,
-    101, 114, 115, 97,  112, 112, 108, 105, 99,  97,  116, 105, 111, 110, 47,
-    103, 114, 112, 99,  80,  79,  83,  84,  50,  48,  48,  52,  48,  52,  104,
-    116, 116, 112, 104, 116, 116, 112, 115, 103, 114, 112, 99,  71,  69,  84,
-    80,  85,  84,  47,  47,  105, 110, 100, 101, 120, 46,  104, 116, 109, 108,
-    50,  48,  52,  50,  48,  54,  51,  48,  52,  52,  48,  48,  53,  48,  48,
-    97,  99,  99,  101, 112, 116, 45,  99,  104, 97,  114, 115, 101, 116, 103,
-    122, 105, 112, 44,  32,  100, 101, 102, 108, 97,  116, 101, 97,  99,  99,
-    101, 112, 116, 45,  108, 97,  110, 103, 117, 97,  103, 101, 97,  99,  99,
-    101, 112, 116, 45,  114, 97,  110, 103, 101, 115, 97,  99,  99,  101, 112,
-    116, 97,  99,  99,  101, 115, 115, 45,  99,  111, 110, 116, 114, 111, 108,
-    45,  97,  108, 108, 111, 119, 45,  111, 114, 105, 103, 105, 110, 97,  103,
-    101, 97,  108, 108, 111, 119, 97,  117, 116, 104, 111, 114, 105, 122, 97,
-    116, 105, 111, 110, 99,  97,  99,  104, 101, 45,  99,  111, 110, 116, 114,
-    111, 108, 99,  111, 110, 116, 101, 110, 116, 45,  100, 105, 115, 112, 111,
-    115, 105, 116, 105, 111, 110, 99,  111, 110, 116, 101, 110, 116, 45,  108,
-    97,  110, 103, 117, 97,  103, 101, 99,  111, 110, 116, 101, 110, 116, 45,
-    108, 101, 110, 103, 116, 104, 99,  111, 110, 116, 101, 110, 116, 45,  108,
-    111, 99,  97,  116, 105, 111, 110, 99,  111, 110, 116, 101, 110, 116, 45,
-    114, 97,  110, 103, 101, 99,  111, 111, 107, 105, 101, 100, 97,  116, 101,
-    101, 116, 97,  103, 101, 120, 112, 101, 99,  116, 101, 120, 112, 105, 114,
-    101, 115, 102, 114, 111, 109, 105, 102, 45,  109, 97,  116, 99,  104, 105,
-    102, 45,  109, 111, 100, 105, 102, 105, 101, 100, 45,  115, 105, 110, 99,
-    101, 105, 102, 45,  110, 111, 110, 101, 45,  109, 97,  116, 99,  104, 105,
-    102, 45,  114, 97,  110, 103, 101, 105, 102, 45,  117, 110, 109, 111, 100,
-    105, 102, 105, 101, 100, 45,  115, 105, 110, 99,  101, 108, 97,  115, 116,
-    45,  109, 111, 100, 105, 102, 105, 101, 100, 108, 98,  45,  99,  111, 115,
-    116, 45,  98,  105, 110, 108, 105, 110, 107, 108, 111, 99,  97,  116, 105,
-    111, 110, 109, 97,  120, 45,  102, 111, 114, 119, 97,  114, 100, 115, 112,
-    114, 111, 120, 121, 45,  97,  117, 116, 104, 101, 110, 116, 105, 99,  97,
-    116, 101, 112, 114, 111, 120, 121, 45,  97,  117, 116, 104, 111, 114, 105,
-    122, 97,  116, 105, 111, 110, 114, 97,  110, 103, 101, 114, 101, 102, 101,
-    114, 101, 114, 114, 101, 102, 114, 101, 115, 104, 114, 101, 116, 114, 121,
-    45,  97,  102, 116, 101, 114, 115, 101, 114, 118, 101, 114, 115, 101, 116,
-    45,  99,  111, 111, 107, 105, 101, 115, 116, 114, 105, 99,  116, 45,  116,
-    114, 97,  110, 115, 112, 111, 114, 116, 45,  115, 101, 99,  117, 114, 105,
-    116, 121, 116, 114, 97,  110, 115, 102, 101, 114, 45,  101, 110, 99,  111,
-    100, 105, 110, 103, 118, 97,  114, 121, 118, 105, 97,  119, 119, 119, 45,
-    97,  117, 116, 104, 101, 110, 116, 105, 99,  97,  116, 101, 105, 100, 101,
-    110, 116, 105, 116, 121, 44,  100, 101, 102, 108, 97,  116, 101, 105, 100,
-    101, 110, 116, 105, 116, 121, 44,  103, 122, 105, 112, 100, 101, 102, 108,
-    97,  116, 101, 44,  103, 122, 105, 112, 105, 100, 101, 110, 116, 105, 116,
-    121, 44,  100, 101, 102, 108, 97,  116, 101, 44,  103, 122, 105, 112};
+static uint8_t g_bytes[] = {58,112,97,116,104,58,109,101,116,104,111,100,58,115,116,97,116,117,115,58,97,117,116,104,111,114,105,116,121,58,115,99,104,101,109,101,116,101,103,114,112,99,45,109,101,115,115,97,103,101,103,114,112,99,45,115,116,97,116,117,115,103,114,112,99,45,112,97,121,108,111,97,100,45,98,105,110,103,114,112,99,45,101,110,99,111,100,105,110,103,103,114,112,99,45,97,99,99,101,112,116,45,101,110,99,111,100,105,110,103,103,114,112,99,45,115,101,114,118,101,114,45,115,116,97,116,115,45,98,105,110,103,114,112,99,45,116,97,103,115,45,98,105,110,103,114,112,99,45,116,114,97,99,101,45,98,105,110,99,111,110,116,101,110,116,45,116,121,112,101,99,111,110,116,101,110,116,45,101,110,99,111,100,105,110,103,97,99,99,101,112,116,45,101,110,99,111,100,105,110,103,103,114,112,99,45,105,110,116,101,114,110,97,108,45,101,110,99,111,100,105,110,103,45,114,101,113,117,101,115,116,103,114,112,99,45,105,110,116,101,114,110,97,108,45,115,116,114,101,97,109,45,101,110,99,111,100,105,110,103,45,114,101,113,117,101,115,116,117,115,101,114,45,97,103,101,110,116,104,111,115,116,108,98,45,116,111,107,101,110,103,114,112,99,45,116,105,109,101,111,117,116,103,114,112,99,46,119,97,105,116,95,102,111,114,95,114,101,97,100,121,103,114,112,99,46,116,105,109,101,111,117,116,103,114,112,99,46,109,97,120,95,114,101,113,117,101,115,116,95,109,101,115,115,97,103,101,95,98,121,116,101,115,103,114,112,99,46,109,97,120,95,114,101,115,112,111,110,115,101,95,109,101,115,115,97,103,101,95,98,121,116,101,115,47,103,114,112,99,46,108,98,46,118,49,46,76,111,97,100,66,97,108,97,110,99,101,114,47,66,97,108,97,110,99,101,76,111,97,100,109,101,115,115,97,103,101,47,100,101,102,108,97,116,101,109,101,115,115,97,103,101,47,103,122,105,112,115,116,114,101,97,109,47,103,122,105,112,48,49,50,105,100,101,110,116,105,116,121,103,122,105,112,100,101,102,108,97,116,101,116,114,97,105,108,101,114,115,97,112,112,108,105,99,97,116,105,111,110,47,103,114,112,99,80,79,83,84,50,48,48,52,48,52,104,116,116,112,104,116,116,112,115,103,114,112,99,71,69,84,80,85,84,47,47,105,110,100,101,120,46,104,116,109,108,50,48,52,50,48,54,51,48,52,52,48,48,53,48,48,97,99,99,101,112,116,45,99,104,97,114,115,101,116,103,122,105,112,44,32,100,101,102,108,97,116,101,97,99,99,101,112,116,45,108,97,110,103,117,97,103,101,97,99,99,101,112,116,45,114,97,110,103,101,115,97,99,99,101,112,116,97,99,99,101,115,115,45,99,111,110,116,114,111,108,45,97,108,108,111,119,45,111,114,105,103,105,110,97,103,101,97,108,108,111,119,97,117,116,104,111,114,105,122,97,116,105,111,110,99,97,99,104,101,45,99,111,110,116,114,111,108,99,111,110,116,101,110,116,45,100,105,115,112,111,115,105,116,105,111,110,99,111,110,116,101,110,116,45,108,97,110,103,117,97,103,101,99,111,110,116,101,110,116,45,108,101,110,103,116,104,99,111,110,116,101,110,116,45,108,111,99,97,116,105,111,110,99,111,110,116,101,110,116,45,114,97,110,103,101,99,111,111,107,105,101,100,97,116,101,101,116,97,103,101,120,112,101,99,116,101,120,112,105,114,101,115,102,114,111,109,105,102,45,109,97,116,99,104,105,102,45,109,111,100,105,102,105,101,100,45,115,105,110,99,101,105,102,45,110,111,110,101,45,109,97,116,99,104,105,102,45,114,97,110,103,101,105,102,45,117,110,109,111,100,105,102,105,101,100,45,115,105,110,99,101,108,97,115,116,45,109,111,100,105,102,105,101,100,108,98,45,99,111,115,116,45,98,105,110,108,105,110,107,108,111,99,97,116,105,111,110,109,97,120,45,102,111,114,119,97,114,100,115,112,114,111,120,121,45,97,117,116,104,101,110,116,105,99,97,116,101,112,114,111,120,121,45,97,117,116,104,111,114,105,122,97,116,105,111,110,114,97,110,103,101,114,101,102,101,114,101,114,114,101,102,114,101,115,104,114,101,116,114,121,45,97,102,116,101,114,115,101,114,118,101,114,115,101,116,45,99,111,111,107,105,101,115,116,114,105,99,116,45,116,114,97,110,115,112,111,114,116,45,115,101,99,117,114,105,116,121,116,114,97,110,115,102,101,114,45,101,110,99,111,100,105,110,103,118,97,114,121,118,105,97,119,119,119,45,97,117,116,104,101,110,116,105,99,97,116,101,105,100,101,110,116,105,116,121,44,100,101,102,108,97,116,101,105,100,101,110,116,105,116,121,44,103,122,105,112,100,101,102,108,97,116,101,44,103,122,105,112,105,100,101,110,116,105,116,121,44,100,101,102,108,97,116,101,44,103,122,105,112};
 
 static void static_ref(void *unused) {}
 static void static_unref(grpc_exec_ctx *exec_ctx, 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};
-const grpc_slice_refcount_vtable grpc_static_metadata_vtable = {
-    static_ref, static_unref, grpc_static_slice_eq, grpc_static_slice_hash};
-static grpc_slice_refcount static_sub_refcnt = {&static_sub_vtable,
-                                                &static_sub_refcnt};
+static const grpc_slice_refcount_vtable static_sub_vtable = {static_ref, static_unref, grpc_slice_default_eq_impl, grpc_slice_default_hash_impl};
+const grpc_slice_refcount_vtable grpc_static_metadata_vtable = {static_ref, static_unref, grpc_static_slice_eq, grpc_static_slice_hash};
+static grpc_slice_refcount static_sub_refcnt = {&static_sub_vtable, &static_sub_refcnt};
 grpc_slice_refcount grpc_static_metadata_refcounts[GRPC_STATIC_MDSTR_COUNT] = {
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
+  {&grpc_static_metadata_vtable, &static_sub_refcnt},
 };
 
 const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT] = {
-    {.refcount = &grpc_static_metadata_refcounts[0],
-     .data.refcounted = {g_bytes + 0, 5}},
-    {.refcount = &grpc_static_metadata_refcounts[1],
-     .data.refcounted = {g_bytes + 5, 7}},
-    {.refcount = &grpc_static_metadata_refcounts[2],
-     .data.refcounted = {g_bytes + 12, 7}},
-    {.refcount = &grpc_static_metadata_refcounts[3],
-     .data.refcounted = {g_bytes + 19, 10}},
-    {.refcount = &grpc_static_metadata_refcounts[4],
-     .data.refcounted = {g_bytes + 29, 7}},
-    {.refcount = &grpc_static_metadata_refcounts[5],
-     .data.refcounted = {g_bytes + 36, 2}},
-    {.refcount = &grpc_static_metadata_refcounts[6],
-     .data.refcounted = {g_bytes + 38, 12}},
-    {.refcount = &grpc_static_metadata_refcounts[7],
-     .data.refcounted = {g_bytes + 50, 11}},
-    {.refcount = &grpc_static_metadata_refcounts[8],
-     .data.refcounted = {g_bytes + 61, 16}},
-    {.refcount = &grpc_static_metadata_refcounts[9],
-     .data.refcounted = {g_bytes + 77, 13}},
-    {.refcount = &grpc_static_metadata_refcounts[10],
-     .data.refcounted = {g_bytes + 90, 20}},
-    {.refcount = &grpc_static_metadata_refcounts[11],
-     .data.refcounted = {g_bytes + 110, 21}},
-    {.refcount = &grpc_static_metadata_refcounts[12],
-     .data.refcounted = {g_bytes + 131, 13}},
-    {.refcount = &grpc_static_metadata_refcounts[13],
-     .data.refcounted = {g_bytes + 144, 14}},
-    {.refcount = &grpc_static_metadata_refcounts[14],
-     .data.refcounted = {g_bytes + 158, 12}},
-    {.refcount = &grpc_static_metadata_refcounts[15],
-     .data.refcounted = {g_bytes + 170, 16}},
-    {.refcount = &grpc_static_metadata_refcounts[16],
-     .data.refcounted = {g_bytes + 186, 15}},
-    {.refcount = &grpc_static_metadata_refcounts[17],
-     .data.refcounted = {g_bytes + 201, 30}},
-    {.refcount = &grpc_static_metadata_refcounts[18],
-     .data.refcounted = {g_bytes + 231, 37}},
-    {.refcount = &grpc_static_metadata_refcounts[19],
-     .data.refcounted = {g_bytes + 268, 10}},
-    {.refcount = &grpc_static_metadata_refcounts[20],
-     .data.refcounted = {g_bytes + 278, 4}},
-    {.refcount = &grpc_static_metadata_refcounts[21],
-     .data.refcounted = {g_bytes + 282, 8}},
-    {.refcount = &grpc_static_metadata_refcounts[22],
-     .data.refcounted = {g_bytes + 290, 12}},
-    {.refcount = &grpc_static_metadata_refcounts[23],
-     .data.refcounted = {g_bytes + 302, 0}},
-    {.refcount = &grpc_static_metadata_refcounts[24],
-     .data.refcounted = {g_bytes + 302, 19}},
-    {.refcount = &grpc_static_metadata_refcounts[25],
-     .data.refcounted = {g_bytes + 321, 12}},
-    {.refcount = &grpc_static_metadata_refcounts[26],
-     .data.refcounted = {g_bytes + 333, 30}},
-    {.refcount = &grpc_static_metadata_refcounts[27],
-     .data.refcounted = {g_bytes + 363, 31}},
-    {.refcount = &grpc_static_metadata_refcounts[28],
-     .data.refcounted = {g_bytes + 394, 36}},
-    {.refcount = &grpc_static_metadata_refcounts[29],
-     .data.refcounted = {g_bytes + 430, 15}},
-    {.refcount = &grpc_static_metadata_refcounts[30],
-     .data.refcounted = {g_bytes + 445, 12}},
-    {.refcount = &grpc_static_metadata_refcounts[31],
-     .data.refcounted = {g_bytes + 457, 11}},
-    {.refcount = &grpc_static_metadata_refcounts[32],
-     .data.refcounted = {g_bytes + 468, 1}},
-    {.refcount = &grpc_static_metadata_refcounts[33],
-     .data.refcounted = {g_bytes + 469, 1}},
-    {.refcount = &grpc_static_metadata_refcounts[34],
-     .data.refcounted = {g_bytes + 470, 1}},
-    {.refcount = &grpc_static_metadata_refcounts[35],
-     .data.refcounted = {g_bytes + 471, 8}},
-    {.refcount = &grpc_static_metadata_refcounts[36],
-     .data.refcounted = {g_bytes + 479, 4}},
-    {.refcount = &grpc_static_metadata_refcounts[37],
-     .data.refcounted = {g_bytes + 483, 7}},
-    {.refcount = &grpc_static_metadata_refcounts[38],
-     .data.refcounted = {g_bytes + 490, 8}},
-    {.refcount = &grpc_static_metadata_refcounts[39],
-     .data.refcounted = {g_bytes + 498, 16}},
-    {.refcount = &grpc_static_metadata_refcounts[40],
-     .data.refcounted = {g_bytes + 514, 4}},
-    {.refcount = &grpc_static_metadata_refcounts[41],
-     .data.refcounted = {g_bytes + 518, 3}},
-    {.refcount = &grpc_static_metadata_refcounts[42],
-     .data.refcounted = {g_bytes + 521, 3}},
-    {.refcount = &grpc_static_metadata_refcounts[43],
-     .data.refcounted = {g_bytes + 524, 4}},
-    {.refcount = &grpc_static_metadata_refcounts[44],
-     .data.refcounted = {g_bytes + 528, 5}},
-    {.refcount = &grpc_static_metadata_refcounts[45],
-     .data.refcounted = {g_bytes + 533, 4}},
-    {.refcount = &grpc_static_metadata_refcounts[46],
-     .data.refcounted = {g_bytes + 537, 3}},
-    {.refcount = &grpc_static_metadata_refcounts[47],
-     .data.refcounted = {g_bytes + 540, 3}},
-    {.refcount = &grpc_static_metadata_refcounts[48],
-     .data.refcounted = {g_bytes + 543, 1}},
-    {.refcount = &grpc_static_metadata_refcounts[49],
-     .data.refcounted = {g_bytes + 544, 11}},
-    {.refcount = &grpc_static_metadata_refcounts[50],
-     .data.refcounted = {g_bytes + 555, 3}},
-    {.refcount = &grpc_static_metadata_refcounts[51],
-     .data.refcounted = {g_bytes + 558, 3}},
-    {.refcount = &grpc_static_metadata_refcounts[52],
-     .data.refcounted = {g_bytes + 561, 3}},
-    {.refcount = &grpc_static_metadata_refcounts[53],
-     .data.refcounted = {g_bytes + 564, 3}},
-    {.refcount = &grpc_static_metadata_refcounts[54],
-     .data.refcounted = {g_bytes + 567, 3}},
-    {.refcount = &grpc_static_metadata_refcounts[55],
-     .data.refcounted = {g_bytes + 570, 14}},
-    {.refcount = &grpc_static_metadata_refcounts[56],
-     .data.refcounted = {g_bytes + 584, 13}},
-    {.refcount = &grpc_static_metadata_refcounts[57],
-     .data.refcounted = {g_bytes + 597, 15}},
-    {.refcount = &grpc_static_metadata_refcounts[58],
-     .data.refcounted = {g_bytes + 612, 13}},
-    {.refcount = &grpc_static_metadata_refcounts[59],
-     .data.refcounted = {g_bytes + 625, 6}},
-    {.refcount = &grpc_static_metadata_refcounts[60],
-     .data.refcounted = {g_bytes + 631, 27}},
-    {.refcount = &grpc_static_metadata_refcounts[61],
-     .data.refcounted = {g_bytes + 658, 3}},
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-     .data.refcounted = {g_bytes + 661, 5}},
-    {.refcount = &grpc_static_metadata_refcounts[63],
-     .data.refcounted = {g_bytes + 666, 13}},
-    {.refcount = &grpc_static_metadata_refcounts[64],
-     .data.refcounted = {g_bytes + 679, 13}},
-    {.refcount = &grpc_static_metadata_refcounts[65],
-     .data.refcounted = {g_bytes + 692, 19}},
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-     .data.refcounted = {g_bytes + 711, 16}},
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-     .data.refcounted = {g_bytes + 727, 14}},
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-     .data.refcounted = {g_bytes + 741, 16}},
-    {.refcount = &grpc_static_metadata_refcounts[69],
-     .data.refcounted = {g_bytes + 757, 13}},
-    {.refcount = &grpc_static_metadata_refcounts[70],
-     .data.refcounted = {g_bytes + 770, 6}},
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-     .data.refcounted = {g_bytes + 776, 4}},
-    {.refcount = &grpc_static_metadata_refcounts[72],
-     .data.refcounted = {g_bytes + 780, 4}},
-    {.refcount = &grpc_static_metadata_refcounts[73],
-     .data.refcounted = {g_bytes + 784, 6}},
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-     .data.refcounted = {g_bytes + 790, 7}},
-    {.refcount = &grpc_static_metadata_refcounts[75],
-     .data.refcounted = {g_bytes + 797, 4}},
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-     .data.refcounted = {g_bytes + 801, 8}},
-    {.refcount = &grpc_static_metadata_refcounts[77],
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-    {.refcount = &grpc_static_metadata_refcounts[78],
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-     .data.refcounted = {g_bytes + 866, 13}},
-    {.refcount = &grpc_static_metadata_refcounts[82],
-     .data.refcounted = {g_bytes + 879, 11}},
-    {.refcount = &grpc_static_metadata_refcounts[83],
-     .data.refcounted = {g_bytes + 890, 4}},
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-     .data.refcounted = {g_bytes + 914, 18}},
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-     .data.refcounted = {g_bytes + 932, 19}},
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-     .data.refcounted = {g_bytes + 951, 5}},
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-     .data.refcounted = {g_bytes + 956, 7}},
-    {.refcount = &grpc_static_metadata_refcounts[90],
-     .data.refcounted = {g_bytes + 963, 7}},
-    {.refcount = &grpc_static_metadata_refcounts[91],
-     .data.refcounted = {g_bytes + 970, 11}},
-    {.refcount = &grpc_static_metadata_refcounts[92],
-     .data.refcounted = {g_bytes + 981, 6}},
-    {.refcount = &grpc_static_metadata_refcounts[93],
-     .data.refcounted = {g_bytes + 987, 10}},
-    {.refcount = &grpc_static_metadata_refcounts[94],
-     .data.refcounted = {g_bytes + 997, 25}},
-    {.refcount = &grpc_static_metadata_refcounts[95],
-     .data.refcounted = {g_bytes + 1022, 17}},
-    {.refcount = &grpc_static_metadata_refcounts[96],
-     .data.refcounted = {g_bytes + 1039, 4}},
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-     .data.refcounted = {g_bytes + 1062, 16}},
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-     .data.refcounted = {g_bytes + 1078, 13}},
-    {.refcount = &grpc_static_metadata_refcounts[101],
-     .data.refcounted = {g_bytes + 1091, 12}},
-    {.refcount = &grpc_static_metadata_refcounts[102],
-     .data.refcounted = {g_bytes + 1103, 21}},
+{&grpc_static_metadata_refcounts[0], {{g_bytes+0, 5}}},
+{&grpc_static_metadata_refcounts[1], {{g_bytes+5, 7}}},
+{&grpc_static_metadata_refcounts[2], {{g_bytes+12, 7}}},
+{&grpc_static_metadata_refcounts[3], {{g_bytes+19, 10}}},
+{&grpc_static_metadata_refcounts[4], {{g_bytes+29, 7}}},
+{&grpc_static_metadata_refcounts[5], {{g_bytes+36, 2}}},
+{&grpc_static_metadata_refcounts[6], {{g_bytes+38, 12}}},
+{&grpc_static_metadata_refcounts[7], {{g_bytes+50, 11}}},
+{&grpc_static_metadata_refcounts[8], {{g_bytes+61, 16}}},
+{&grpc_static_metadata_refcounts[9], {{g_bytes+77, 13}}},
+{&grpc_static_metadata_refcounts[10], {{g_bytes+90, 20}}},
+{&grpc_static_metadata_refcounts[11], {{g_bytes+110, 21}}},
+{&grpc_static_metadata_refcounts[12], {{g_bytes+131, 13}}},
+{&grpc_static_metadata_refcounts[13], {{g_bytes+144, 14}}},
+{&grpc_static_metadata_refcounts[14], {{g_bytes+158, 12}}},
+{&grpc_static_metadata_refcounts[15], {{g_bytes+170, 16}}},
+{&grpc_static_metadata_refcounts[16], {{g_bytes+186, 15}}},
+{&grpc_static_metadata_refcounts[17], {{g_bytes+201, 30}}},
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+{&grpc_static_metadata_refcounts[22], {{g_bytes+290, 12}}},
+{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}},
+{&grpc_static_metadata_refcounts[24], {{g_bytes+302, 19}}},
+{&grpc_static_metadata_refcounts[25], {{g_bytes+321, 12}}},
+{&grpc_static_metadata_refcounts[26], {{g_bytes+333, 30}}},
+{&grpc_static_metadata_refcounts[27], {{g_bytes+363, 31}}},
+{&grpc_static_metadata_refcounts[28], {{g_bytes+394, 36}}},
+{&grpc_static_metadata_refcounts[29], {{g_bytes+430, 15}}},
+{&grpc_static_metadata_refcounts[30], {{g_bytes+445, 12}}},
+{&grpc_static_metadata_refcounts[31], {{g_bytes+457, 11}}},
+{&grpc_static_metadata_refcounts[32], {{g_bytes+468, 1}}},
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+{&grpc_static_metadata_refcounts[34], {{g_bytes+470, 1}}},
+{&grpc_static_metadata_refcounts[35], {{g_bytes+471, 8}}},
+{&grpc_static_metadata_refcounts[36], {{g_bytes+479, 4}}},
+{&grpc_static_metadata_refcounts[37], {{g_bytes+483, 7}}},
+{&grpc_static_metadata_refcounts[38], {{g_bytes+490, 8}}},
+{&grpc_static_metadata_refcounts[39], {{g_bytes+498, 16}}},
+{&grpc_static_metadata_refcounts[40], {{g_bytes+514, 4}}},
+{&grpc_static_metadata_refcounts[41], {{g_bytes+518, 3}}},
+{&grpc_static_metadata_refcounts[42], {{g_bytes+521, 3}}},
+{&grpc_static_metadata_refcounts[43], {{g_bytes+524, 4}}},
+{&grpc_static_metadata_refcounts[44], {{g_bytes+528, 5}}},
+{&grpc_static_metadata_refcounts[45], {{g_bytes+533, 4}}},
+{&grpc_static_metadata_refcounts[46], {{g_bytes+537, 3}}},
+{&grpc_static_metadata_refcounts[47], {{g_bytes+540, 3}}},
+{&grpc_static_metadata_refcounts[48], {{g_bytes+543, 1}}},
+{&grpc_static_metadata_refcounts[49], {{g_bytes+544, 11}}},
+{&grpc_static_metadata_refcounts[50], {{g_bytes+555, 3}}},
+{&grpc_static_metadata_refcounts[51], {{g_bytes+558, 3}}},
+{&grpc_static_metadata_refcounts[52], {{g_bytes+561, 3}}},
+{&grpc_static_metadata_refcounts[53], {{g_bytes+564, 3}}},
+{&grpc_static_metadata_refcounts[54], {{g_bytes+567, 3}}},
+{&grpc_static_metadata_refcounts[55], {{g_bytes+570, 14}}},
+{&grpc_static_metadata_refcounts[56], {{g_bytes+584, 13}}},
+{&grpc_static_metadata_refcounts[57], {{g_bytes+597, 15}}},
+{&grpc_static_metadata_refcounts[58], {{g_bytes+612, 13}}},
+{&grpc_static_metadata_refcounts[59], {{g_bytes+625, 6}}},
+{&grpc_static_metadata_refcounts[60], {{g_bytes+631, 27}}},
+{&grpc_static_metadata_refcounts[61], {{g_bytes+658, 3}}},
+{&grpc_static_metadata_refcounts[62], {{g_bytes+661, 5}}},
+{&grpc_static_metadata_refcounts[63], {{g_bytes+666, 13}}},
+{&grpc_static_metadata_refcounts[64], {{g_bytes+679, 13}}},
+{&grpc_static_metadata_refcounts[65], {{g_bytes+692, 19}}},
+{&grpc_static_metadata_refcounts[66], {{g_bytes+711, 16}}},
+{&grpc_static_metadata_refcounts[67], {{g_bytes+727, 14}}},
+{&grpc_static_metadata_refcounts[68], {{g_bytes+741, 16}}},
+{&grpc_static_metadata_refcounts[69], {{g_bytes+757, 13}}},
+{&grpc_static_metadata_refcounts[70], {{g_bytes+770, 6}}},
+{&grpc_static_metadata_refcounts[71], {{g_bytes+776, 4}}},
+{&grpc_static_metadata_refcounts[72], {{g_bytes+780, 4}}},
+{&grpc_static_metadata_refcounts[73], {{g_bytes+784, 6}}},
+{&grpc_static_metadata_refcounts[74], {{g_bytes+790, 7}}},
+{&grpc_static_metadata_refcounts[75], {{g_bytes+797, 4}}},
+{&grpc_static_metadata_refcounts[76], {{g_bytes+801, 8}}},
+{&grpc_static_metadata_refcounts[77], {{g_bytes+809, 17}}},
+{&grpc_static_metadata_refcounts[78], {{g_bytes+826, 13}}},
+{&grpc_static_metadata_refcounts[79], {{g_bytes+839, 8}}},
+{&grpc_static_metadata_refcounts[80], {{g_bytes+847, 19}}},
+{&grpc_static_metadata_refcounts[81], {{g_bytes+866, 13}}},
+{&grpc_static_metadata_refcounts[82], {{g_bytes+879, 11}}},
+{&grpc_static_metadata_refcounts[83], {{g_bytes+890, 4}}},
+{&grpc_static_metadata_refcounts[84], {{g_bytes+894, 8}}},
+{&grpc_static_metadata_refcounts[85], {{g_bytes+902, 12}}},
+{&grpc_static_metadata_refcounts[86], {{g_bytes+914, 18}}},
+{&grpc_static_metadata_refcounts[87], {{g_bytes+932, 19}}},
+{&grpc_static_metadata_refcounts[88], {{g_bytes+951, 5}}},
+{&grpc_static_metadata_refcounts[89], {{g_bytes+956, 7}}},
+{&grpc_static_metadata_refcounts[90], {{g_bytes+963, 7}}},
+{&grpc_static_metadata_refcounts[91], {{g_bytes+970, 11}}},
+{&grpc_static_metadata_refcounts[92], {{g_bytes+981, 6}}},
+{&grpc_static_metadata_refcounts[93], {{g_bytes+987, 10}}},
+{&grpc_static_metadata_refcounts[94], {{g_bytes+997, 25}}},
+{&grpc_static_metadata_refcounts[95], {{g_bytes+1022, 17}}},
+{&grpc_static_metadata_refcounts[96], {{g_bytes+1039, 4}}},
+{&grpc_static_metadata_refcounts[97], {{g_bytes+1043, 3}}},
+{&grpc_static_metadata_refcounts[98], {{g_bytes+1046, 16}}},
+{&grpc_static_metadata_refcounts[99], {{g_bytes+1062, 16}}},
+{&grpc_static_metadata_refcounts[100], {{g_bytes+1078, 13}}},
+{&grpc_static_metadata_refcounts[101], {{g_bytes+1091, 12}}},
+{&grpc_static_metadata_refcounts[102], {{g_bytes+1103, 21}}},
 };
 
 uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT] = {
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 6, 6, 8, 8, 2, 4, 4};
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,4,4,6,6,8,8,2,4,4
+};
+
 
-static const int8_t elems_r[] = {
-    11, 9,  -3, 0,  10,  25, -77, 26,  0,   11,  -7,  0,   0,  0,  21, 14, 1,
-    0,  0,  33, 12, 11,  0,  0,   0,   0,   0,   0,   0,   0,  0,  0,  0,  0,
-    0,  0,  0,  0,  0,   0,  0,   0,   0,   0,   0,   0,   0,  0,  0,  0,  0,
-    0,  0,  0,  0,  -56, 0,  -36, -61, -60, -39, -63, -64, 0,  36, 35, 34, 33,
-    34, 33, 32, 31, 31,  30, 29,  28,  27,  26,  26,  25,  25, 24, 23, 22, 21,
-    20, 19, 22, 21, 20,  19, 18,  17,  16,  15,  14,  13,  12, 12, 11, 0};
+static const int8_t elems_r[] = {11,9,-3,0,10,25,-77,26,0,11,-7,0,0,0,21,14,1,0,0,33,12,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-56,0,-36,-61,-60,-39,-63,-64,0,36,35,34,33,34,33,32,31,31,30,29,28,27,26,26,25,25,24,23,22,21,20,19,22,21,20,19,18,17,16,15,14,13,12,12,11,0};
 static uint32_t elems_phash(uint32_t i) {
   i -= 48;
   uint32_t x = i % 101;
@@ -453,413 +264,134 @@ static uint32_t elems_phash(uint32_t i) {
   }
   return h;
 }
-
-static const uint16_t elem_keys[] = {
-    1065, 1066, 1067, 256,  257,  258,  259,  260,  1671,  149,   150,  48,
-    49,   455,  456,  457,  962,  963,  964,  1568, 1683,  1684,  753,  754,
-    1465, 553,  755,  2083, 2186, 5688, 5997, 1580, 1581,  6100,  6306, 6409,
-    6512, 6615, 6718, 6821, 1481, 1704, 6924, 7027, 7130,  7233,  1980, 7336,
-    7439, 7542, 7645, 7748, 7851, 5894, 7954, 8057, 6203,  8160,  8263, 8366,
-    8469, 8572, 8675, 8778, 1129, 1130, 1131, 1132, 8881,  8984,  9087, 9190,
-    9293, 9396, 9499, 9602, 9705, 9808, 9911, 332,  10014, 10117, 0,    0,
-    0,    1748, 0,    0,    0,    0,    0,    0,    0,     0,     0,    0,
-    0,    0,    0,    0,    0,    0,    0,    0,    0,     0,     143,  247,
-    248,  0,    0,    0,    0,    0,    0,    0,    0,     0,     0,    0,
-    0,    0,    0,    0,    0,    0,    0,    0,    0,     0,     0,    0,
-    0,    0,    0,    0};
-static const uint8_t elem_idxs[] = {
-    76,  79,  77,  19,  20,  21,  22,  23,  25,  15,  16,  17,  18,  11,
-    12,  13,  3,   4,   5,   38,  83,  84,  0,   1,   43,  6,   2,   50,
-    57,  24,  28,  36,  37,  29,  31,  32,  33,  34,  35,  39,  7,   26,
-    40,  41,  42,  44,  72,  45,  46,  47,  48,  49,  51,  27,  52,  53,
-    30,  54,  55,  56,  58,  59,  60,  61,  78,  80,  81,  82,  62,  63,
-    64,  65,  66,  67,  68,  69,  70,  71,  73,  14,  74,  75,  255, 255,
-    255, 85,  255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
-    255, 255, 255, 255, 255, 255, 255, 255, 8,   9,   10};
+    
+static const uint16_t elem_keys[] = {1065,1066,1067,256,257,258,259,260,1671,149,150,48,49,455,456,457,962,963,964,1568,1683,1684,753,754,1465,553,755,2083,2186,5688,5997,1580,1581,6100,6306,6409,6512,6615,6718,6821,1481,1704,6924,7027,7130,7233,1980,7336,7439,7542,7645,7748,7851,5894,7954,8057,6203,8160,8263,8366,8469,8572,8675,8778,1129,1130,1131,1132,8881,8984,9087,9190,9293,9396,9499,9602,9705,9808,9911,332,10014,10117,0,0,0,1748,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,143,247,248,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+static const uint8_t elem_idxs[] = {76,79,77,19,20,21,22,23,25,15,16,17,18,11,12,13,3,4,5,38,83,84,0,1,43,6,2,50,57,24,28,36,37,29,31,32,33,34,35,39,7,26,40,41,42,44,72,45,46,47,48,49,51,27,52,53,30,54,55,56,58,59,60,61,78,80,81,82,62,63,64,65,66,67,68,69,70,71,73,14,74,75,255,255,255,85,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,8,9,10};
 
 grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b) {
   if (a == -1 || b == -1) return GRPC_MDNULL;
   uint32_t k = (uint32_t)(a * 103 + b);
   uint32_t h = elems_phash(k);
-  return h < GPR_ARRAY_SIZE(elem_keys) && elem_keys[h] == k &&
-                 elem_idxs[h] != 255
-             ? GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[elem_idxs[h]],
-                                GRPC_MDELEM_STORAGE_STATIC)
-             : GRPC_MDNULL;
+  return h < GPR_ARRAY_SIZE(elem_keys) && elem_keys[h] == k && elem_idxs[h] != 255 ? GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[elem_idxs[h]], GRPC_MDELEM_STORAGE_STATIC) : GRPC_MDNULL;
 }
 
 grpc_mdelem_data grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT] = {
-    {{.refcount = &grpc_static_metadata_refcounts[7],
-      .data.refcounted = {g_bytes + 50, 11}},
-     {.refcount = &grpc_static_metadata_refcounts[32],
-      .data.refcounted = {g_bytes + 468, 1}}},
-    {{.refcount = &grpc_static_metadata_refcounts[7],
-      .data.refcounted = {g_bytes + 50, 11}},
-     {.refcount = &grpc_static_metadata_refcounts[33],
-      .data.refcounted = {g_bytes + 469, 1}}},
-    {{.refcount = &grpc_static_metadata_refcounts[7],
-      .data.refcounted = {g_bytes + 50, 11}},
-     {.refcount = &grpc_static_metadata_refcounts[34],
-      .data.refcounted = {g_bytes + 470, 1}}},
-    {{.refcount = &grpc_static_metadata_refcounts[9],
-      .data.refcounted = {g_bytes + 77, 13}},
-     {.refcount = &grpc_static_metadata_refcounts[35],
-      .data.refcounted = {g_bytes + 471, 8}}},
-    {{.refcount = &grpc_static_metadata_refcounts[9],
-      .data.refcounted = {g_bytes + 77, 13}},
-     {.refcount = &grpc_static_metadata_refcounts[36],
-      .data.refcounted = {g_bytes + 479, 4}}},
-    {{.refcount = &grpc_static_metadata_refcounts[9],
-      .data.refcounted = {g_bytes + 77, 13}},
-     {.refcount = &grpc_static_metadata_refcounts[37],
-      .data.refcounted = {g_bytes + 483, 7}}},
-    {{.refcount = &grpc_static_metadata_refcounts[5],
-      .data.refcounted = {g_bytes + 36, 2}},
-     {.refcount = &grpc_static_metadata_refcounts[38],
-      .data.refcounted = {g_bytes + 490, 8}}},
-    {{.refcount = &grpc_static_metadata_refcounts[14],
-      .data.refcounted = {g_bytes + 158, 12}},
-     {.refcount = &grpc_static_metadata_refcounts[39],
-      .data.refcounted = {g_bytes + 498, 16}}},
-    {{.refcount = &grpc_static_metadata_refcounts[1],
-      .data.refcounted = {g_bytes + 5, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[40],
-      .data.refcounted = {g_bytes + 514, 4}}},
-    {{.refcount = &grpc_static_metadata_refcounts[2],
-      .data.refcounted = {g_bytes + 12, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[41],
-      .data.refcounted = {g_bytes + 518, 3}}},
-    {{.refcount = &grpc_static_metadata_refcounts[2],
-      .data.refcounted = {g_bytes + 12, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[42],
-      .data.refcounted = {g_bytes + 521, 3}}},
-    {{.refcount = &grpc_static_metadata_refcounts[4],
-      .data.refcounted = {g_bytes + 29, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[43],
-      .data.refcounted = {g_bytes + 524, 4}}},
-    {{.refcount = &grpc_static_metadata_refcounts[4],
-      .data.refcounted = {g_bytes + 29, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[44],
-      .data.refcounted = {g_bytes + 528, 5}}},
-    {{.refcount = &grpc_static_metadata_refcounts[4],
-      .data.refcounted = {g_bytes + 29, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[45],
-      .data.refcounted = {g_bytes + 533, 4}}},
-    {{.refcount = &grpc_static_metadata_refcounts[3],
-      .data.refcounted = {g_bytes + 19, 10}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[1],
-      .data.refcounted = {g_bytes + 5, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[46],
-      .data.refcounted = {g_bytes + 537, 3}}},
-    {{.refcount = &grpc_static_metadata_refcounts[1],
-      .data.refcounted = {g_bytes + 5, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[47],
-      .data.refcounted = {g_bytes + 540, 3}}},
-    {{.refcount = &grpc_static_metadata_refcounts[0],
-      .data.refcounted = {g_bytes + 0, 5}},
-     {.refcount = &grpc_static_metadata_refcounts[48],
-      .data.refcounted = {g_bytes + 543, 1}}},
-    {{.refcount = &grpc_static_metadata_refcounts[0],
-      .data.refcounted = {g_bytes + 0, 5}},
-     {.refcount = &grpc_static_metadata_refcounts[49],
-      .data.refcounted = {g_bytes + 544, 11}}},
-    {{.refcount = &grpc_static_metadata_refcounts[2],
-      .data.refcounted = {g_bytes + 12, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[50],
-      .data.refcounted = {g_bytes + 555, 3}}},
-    {{.refcount = &grpc_static_metadata_refcounts[2],
-      .data.refcounted = {g_bytes + 12, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[51],
-      .data.refcounted = {g_bytes + 558, 3}}},
-    {{.refcount = &grpc_static_metadata_refcounts[2],
-      .data.refcounted = {g_bytes + 12, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[52],
-      .data.refcounted = {g_bytes + 561, 3}}},
-    {{.refcount = &grpc_static_metadata_refcounts[2],
-      .data.refcounted = {g_bytes + 12, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[53],
-      .data.refcounted = {g_bytes + 564, 3}}},
-    {{.refcount = &grpc_static_metadata_refcounts[2],
-      .data.refcounted = {g_bytes + 12, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[54],
-      .data.refcounted = {g_bytes + 567, 3}}},
-    {{.refcount = &grpc_static_metadata_refcounts[55],
-      .data.refcounted = {g_bytes + 570, 14}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[16],
-      .data.refcounted = {g_bytes + 186, 15}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[16],
-      .data.refcounted = {g_bytes + 186, 15}},
-     {.refcount = &grpc_static_metadata_refcounts[56],
-      .data.refcounted = {g_bytes + 584, 13}}},
-    {{.refcount = &grpc_static_metadata_refcounts[57],
-      .data.refcounted = {g_bytes + 597, 15}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[58],
-      .data.refcounted = {g_bytes + 612, 13}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[59],
-      .data.refcounted = {g_bytes + 625, 6}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[60],
-      .data.refcounted = {g_bytes + 631, 27}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[61],
-      .data.refcounted = {g_bytes + 658, 3}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[62],
-      .data.refcounted = {g_bytes + 661, 5}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[63],
-      .data.refcounted = {g_bytes + 666, 13}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[64],
-      .data.refcounted = {g_bytes + 679, 13}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[65],
-      .data.refcounted = {g_bytes + 692, 19}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[15],
-      .data.refcounted = {g_bytes + 170, 16}},
-     {.refcount = &grpc_static_metadata_refcounts[35],
-      .data.refcounted = {g_bytes + 471, 8}}},
-    {{.refcount = &grpc_static_metadata_refcounts[15],
-      .data.refcounted = {g_bytes + 170, 16}},
-     {.refcount = &grpc_static_metadata_refcounts[36],
-      .data.refcounted = {g_bytes + 479, 4}}},
-    {{.refcount = &grpc_static_metadata_refcounts[15],
-      .data.refcounted = {g_bytes + 170, 16}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[66],
-      .data.refcounted = {g_bytes + 711, 16}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[67],
-      .data.refcounted = {g_bytes + 727, 14}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[68],
-      .data.refcounted = {g_bytes + 741, 16}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[69],
-      .data.refcounted = {g_bytes + 757, 13}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[14],
-      .data.refcounted = {g_bytes + 158, 12}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[70],
-      .data.refcounted = {g_bytes + 770, 6}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[71],
-      .data.refcounted = {g_bytes + 776, 4}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[72],
-      .data.refcounted = {g_bytes + 780, 4}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[73],
-      .data.refcounted = {g_bytes + 784, 6}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[74],
-      .data.refcounted = {g_bytes + 790, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[75],
-      .data.refcounted = {g_bytes + 797, 4}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[20],
-      .data.refcounted = {g_bytes + 278, 4}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[76],
-      .data.refcounted = {g_bytes + 801, 8}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[77],
-      .data.refcounted = {g_bytes + 809, 17}},
-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[78],
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-     {.refcount = &grpc_static_metadata_refcounts[23],
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-    {{.refcount = &grpc_static_metadata_refcounts[79],
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-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[82],
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-    {{.refcount = &grpc_static_metadata_refcounts[84],
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-    {{.refcount = &grpc_static_metadata_refcounts[85],
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-    {{.refcount = &grpc_static_metadata_refcounts[86],
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-     {.refcount = &grpc_static_metadata_refcounts[23],
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-    {{.refcount = &grpc_static_metadata_refcounts[87],
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-    {{.refcount = &grpc_static_metadata_refcounts[90],
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-    {{.refcount = &grpc_static_metadata_refcounts[91],
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-    {{.refcount = &grpc_static_metadata_refcounts[93],
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-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
-    {{.refcount = &grpc_static_metadata_refcounts[94],
-      .data.refcounted = {g_bytes + 997, 25}},
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-     {.refcount = &grpc_static_metadata_refcounts[23],
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-     {.refcount = &grpc_static_metadata_refcounts[23],
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-    {{.refcount = &grpc_static_metadata_refcounts[96],
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-     {.refcount = &grpc_static_metadata_refcounts[23],
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-    {{.refcount = &grpc_static_metadata_refcounts[97],
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-     {.refcount = &grpc_static_metadata_refcounts[23],
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-    {{.refcount = &grpc_static_metadata_refcounts[98],
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-     {.refcount = &grpc_static_metadata_refcounts[23],
-      .data.refcounted = {g_bytes + 302, 0}}},
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-     {.refcount = &grpc_static_metadata_refcounts[35],
-      .data.refcounted = {g_bytes + 471, 8}}},
-    {{.refcount = &grpc_static_metadata_refcounts[10],
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-     {.refcount = &grpc_static_metadata_refcounts[37],
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-      .data.refcounted = {g_bytes + 90, 20}},
-     {.refcount = &grpc_static_metadata_refcounts[99],
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-    {{.refcount = &grpc_static_metadata_refcounts[10],
-      .data.refcounted = {g_bytes + 90, 20}},
-     {.refcount = &grpc_static_metadata_refcounts[36],
-      .data.refcounted = {g_bytes + 479, 4}}},
-    {{.refcount = &grpc_static_metadata_refcounts[10],
-      .data.refcounted = {g_bytes + 90, 20}},
-     {.refcount = &grpc_static_metadata_refcounts[100],
-      .data.refcounted = {g_bytes + 1078, 13}}},
-    {{.refcount = &grpc_static_metadata_refcounts[10],
-      .data.refcounted = {g_bytes + 90, 20}},
-     {.refcount = &grpc_static_metadata_refcounts[101],
-      .data.refcounted = {g_bytes + 1091, 12}}},
-    {{.refcount = &grpc_static_metadata_refcounts[10],
-      .data.refcounted = {g_bytes + 90, 20}},
-     {.refcount = &grpc_static_metadata_refcounts[102],
-      .data.refcounted = {g_bytes + 1103, 21}}},
-    {{.refcount = &grpc_static_metadata_refcounts[16],
-      .data.refcounted = {g_bytes + 186, 15}},
-     {.refcount = &grpc_static_metadata_refcounts[35],
-      .data.refcounted = {g_bytes + 471, 8}}},
-    {{.refcount = &grpc_static_metadata_refcounts[16],
-      .data.refcounted = {g_bytes + 186, 15}},
-     {.refcount = &grpc_static_metadata_refcounts[36],
-      .data.refcounted = {g_bytes + 479, 4}}},
-    {{.refcount = &grpc_static_metadata_refcounts[16],
-      .data.refcounted = {g_bytes + 186, 15}},
-     {.refcount = &grpc_static_metadata_refcounts[100],
-      .data.refcounted = {g_bytes + 1078, 13}}},
+{{&grpc_static_metadata_refcounts[7], {{g_bytes+50, 11}}},{&grpc_static_metadata_refcounts[32], {{g_bytes+468, 1}}}},
+{{&grpc_static_metadata_refcounts[7], {{g_bytes+50, 11}}},{&grpc_static_metadata_refcounts[33], {{g_bytes+469, 1}}}},
+{{&grpc_static_metadata_refcounts[7], {{g_bytes+50, 11}}},{&grpc_static_metadata_refcounts[34], {{g_bytes+470, 1}}}},
+{{&grpc_static_metadata_refcounts[9], {{g_bytes+77, 13}}},{&grpc_static_metadata_refcounts[35], {{g_bytes+471, 8}}}},
+{{&grpc_static_metadata_refcounts[9], {{g_bytes+77, 13}}},{&grpc_static_metadata_refcounts[36], {{g_bytes+479, 4}}}},
+{{&grpc_static_metadata_refcounts[9], {{g_bytes+77, 13}}},{&grpc_static_metadata_refcounts[37], {{g_bytes+483, 7}}}},
+{{&grpc_static_metadata_refcounts[5], {{g_bytes+36, 2}}},{&grpc_static_metadata_refcounts[38], {{g_bytes+490, 8}}}},
+{{&grpc_static_metadata_refcounts[14], {{g_bytes+158, 12}}},{&grpc_static_metadata_refcounts[39], {{g_bytes+498, 16}}}},
+{{&grpc_static_metadata_refcounts[1], {{g_bytes+5, 7}}},{&grpc_static_metadata_refcounts[40], {{g_bytes+514, 4}}}},
+{{&grpc_static_metadata_refcounts[2], {{g_bytes+12, 7}}},{&grpc_static_metadata_refcounts[41], {{g_bytes+518, 3}}}},
+{{&grpc_static_metadata_refcounts[2], {{g_bytes+12, 7}}},{&grpc_static_metadata_refcounts[42], {{g_bytes+521, 3}}}},
+{{&grpc_static_metadata_refcounts[4], {{g_bytes+29, 7}}},{&grpc_static_metadata_refcounts[43], {{g_bytes+524, 4}}}},
+{{&grpc_static_metadata_refcounts[4], {{g_bytes+29, 7}}},{&grpc_static_metadata_refcounts[44], {{g_bytes+528, 5}}}},
+{{&grpc_static_metadata_refcounts[4], {{g_bytes+29, 7}}},{&grpc_static_metadata_refcounts[45], {{g_bytes+533, 4}}}},
+{{&grpc_static_metadata_refcounts[3], {{g_bytes+19, 10}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[1], {{g_bytes+5, 7}}},{&grpc_static_metadata_refcounts[46], {{g_bytes+537, 3}}}},
+{{&grpc_static_metadata_refcounts[1], {{g_bytes+5, 7}}},{&grpc_static_metadata_refcounts[47], {{g_bytes+540, 3}}}},
+{{&grpc_static_metadata_refcounts[0], {{g_bytes+0, 5}}},{&grpc_static_metadata_refcounts[48], {{g_bytes+543, 1}}}},
+{{&grpc_static_metadata_refcounts[0], {{g_bytes+0, 5}}},{&grpc_static_metadata_refcounts[49], {{g_bytes+544, 11}}}},
+{{&grpc_static_metadata_refcounts[2], {{g_bytes+12, 7}}},{&grpc_static_metadata_refcounts[50], {{g_bytes+555, 3}}}},
+{{&grpc_static_metadata_refcounts[2], {{g_bytes+12, 7}}},{&grpc_static_metadata_refcounts[51], {{g_bytes+558, 3}}}},
+{{&grpc_static_metadata_refcounts[2], {{g_bytes+12, 7}}},{&grpc_static_metadata_refcounts[52], {{g_bytes+561, 3}}}},
+{{&grpc_static_metadata_refcounts[2], {{g_bytes+12, 7}}},{&grpc_static_metadata_refcounts[53], {{g_bytes+564, 3}}}},
+{{&grpc_static_metadata_refcounts[2], {{g_bytes+12, 7}}},{&grpc_static_metadata_refcounts[54], {{g_bytes+567, 3}}}},
+{{&grpc_static_metadata_refcounts[55], {{g_bytes+570, 14}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[16], {{g_bytes+186, 15}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[16], {{g_bytes+186, 15}}},{&grpc_static_metadata_refcounts[56], {{g_bytes+584, 13}}}},
+{{&grpc_static_metadata_refcounts[57], {{g_bytes+597, 15}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[58], {{g_bytes+612, 13}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[59], {{g_bytes+625, 6}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[60], {{g_bytes+631, 27}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[61], {{g_bytes+658, 3}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[62], {{g_bytes+661, 5}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[63], {{g_bytes+666, 13}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[64], {{g_bytes+679, 13}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[65], {{g_bytes+692, 19}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[15], {{g_bytes+170, 16}}},{&grpc_static_metadata_refcounts[35], {{g_bytes+471, 8}}}},
+{{&grpc_static_metadata_refcounts[15], {{g_bytes+170, 16}}},{&grpc_static_metadata_refcounts[36], {{g_bytes+479, 4}}}},
+{{&grpc_static_metadata_refcounts[15], {{g_bytes+170, 16}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[66], {{g_bytes+711, 16}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[67], {{g_bytes+727, 14}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[68], {{g_bytes+741, 16}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[69], {{g_bytes+757, 13}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[14], {{g_bytes+158, 12}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[70], {{g_bytes+770, 6}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[71], {{g_bytes+776, 4}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[72], {{g_bytes+780, 4}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[73], {{g_bytes+784, 6}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[74], {{g_bytes+790, 7}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[75], {{g_bytes+797, 4}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[20], {{g_bytes+278, 4}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[76], {{g_bytes+801, 8}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[77], {{g_bytes+809, 17}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[78], {{g_bytes+826, 13}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[79], {{g_bytes+839, 8}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[80], {{g_bytes+847, 19}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[81], {{g_bytes+866, 13}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[21], {{g_bytes+282, 8}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[82], {{g_bytes+879, 11}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[83], {{g_bytes+890, 4}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[84], {{g_bytes+894, 8}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[85], {{g_bytes+902, 12}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[86], {{g_bytes+914, 18}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[87], {{g_bytes+932, 19}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[88], {{g_bytes+951, 5}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[89], {{g_bytes+956, 7}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[90], {{g_bytes+963, 7}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[91], {{g_bytes+970, 11}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[92], {{g_bytes+981, 6}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[93], {{g_bytes+987, 10}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[94], {{g_bytes+997, 25}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[95], {{g_bytes+1022, 17}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[19], {{g_bytes+268, 10}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[96], {{g_bytes+1039, 4}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[97], {{g_bytes+1043, 3}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[98], {{g_bytes+1046, 16}}},{&grpc_static_metadata_refcounts[23], {{g_bytes+302, 0}}}},
+{{&grpc_static_metadata_refcounts[10], {{g_bytes+90, 20}}},{&grpc_static_metadata_refcounts[35], {{g_bytes+471, 8}}}},
+{{&grpc_static_metadata_refcounts[10], {{g_bytes+90, 20}}},{&grpc_static_metadata_refcounts[37], {{g_bytes+483, 7}}}},
+{{&grpc_static_metadata_refcounts[10], {{g_bytes+90, 20}}},{&grpc_static_metadata_refcounts[99], {{g_bytes+1062, 16}}}},
+{{&grpc_static_metadata_refcounts[10], {{g_bytes+90, 20}}},{&grpc_static_metadata_refcounts[36], {{g_bytes+479, 4}}}},
+{{&grpc_static_metadata_refcounts[10], {{g_bytes+90, 20}}},{&grpc_static_metadata_refcounts[100], {{g_bytes+1078, 13}}}},
+{{&grpc_static_metadata_refcounts[10], {{g_bytes+90, 20}}},{&grpc_static_metadata_refcounts[101], {{g_bytes+1091, 12}}}},
+{{&grpc_static_metadata_refcounts[10], {{g_bytes+90, 20}}},{&grpc_static_metadata_refcounts[102], {{g_bytes+1103, 21}}}},
+{{&grpc_static_metadata_refcounts[16], {{g_bytes+186, 15}}},{&grpc_static_metadata_refcounts[35], {{g_bytes+471, 8}}}},
+{{&grpc_static_metadata_refcounts[16], {{g_bytes+186, 15}}},{&grpc_static_metadata_refcounts[36], {{g_bytes+479, 4}}}},
+{{&grpc_static_metadata_refcounts[16], {{g_bytes+186, 15}}},{&grpc_static_metadata_refcounts[100], {{g_bytes+1078, 13}}}},
 };
 bool grpc_static_callout_is_default[GRPC_BATCH_CALLOUTS_COUNT] = {
-    true,  // :path
-    true,  // :method
-    true,  // :status
-    true,  // :authority
-    true,  // :scheme
-    true,  // te
-    true,  // grpc-message
-    true,  // grpc-status
-    true,  // grpc-payload-bin
-    true,  // grpc-encoding
-    true,  // grpc-accept-encoding
-    true,  // grpc-server-stats-bin
-    true,  // grpc-tags-bin
-    true,  // grpc-trace-bin
-    true,  // content-type
-    true,  // content-encoding
-    true,  // accept-encoding
-    true,  // grpc-internal-encoding-request
-    true,  // grpc-internal-stream-encoding-request
-    true,  // user-agent
-    true,  // host
-    true,  // lb-token
+  true, // :path
+  true, // :method
+  true, // :status
+  true, // :authority
+  true, // :scheme
+  true, // te
+  true, // grpc-message
+  true, // grpc-status
+  true, // grpc-payload-bin
+  true, // grpc-encoding
+  true, // grpc-accept-encoding
+  true, // grpc-server-stats-bin
+  true, // grpc-tags-bin
+  true, // grpc-trace-bin
+  true, // content-type
+  true, // content-encoding
+  true, // accept-encoding
+  true, // grpc-internal-encoding-request
+  true, // grpc-internal-stream-encoding-request
+  true, // user-agent
+  true, // host
+  true, // lb-token
 };
 
-const uint8_t grpc_static_accept_encoding_metadata[8] = {0,  76, 77, 78,
-                                                         79, 80, 81, 82};
+const uint8_t grpc_static_accept_encoding_metadata[8] = {
+0,76,77,78,79,80,81,82
+};
 
-const uint8_t grpc_static_accept_stream_encoding_metadata[4] = {0, 83, 84, 85};
+const uint8_t grpc_static_accept_stream_encoding_metadata[4] = {
+0,83,84,85
+};
diff --git a/src/core/lib/transport/static_metadata.h b/src/core/lib/transport/static_metadata.h
index 176a65e38e..d94aab3fa3 100644
--- a/src/core/lib/transport/static_metadata.h
+++ b/src/core/lib/transport/static_metadata.h
@@ -1,12 +1,12 @@
 /*
  * Copyright 2015 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.
@@ -16,10 +16,10 @@
 
 /*
  * 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
  * an explanation of what's going on.
  */
@@ -68,8 +68,7 @@ extern const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT];
 /* "grpc-internal-encoding-request" */
 #define GRPC_MDSTR_GRPC_INTERNAL_ENCODING_REQUEST (grpc_static_slice_table[17])
 /* "grpc-internal-stream-encoding-request" */
-#define GRPC_MDSTR_GRPC_INTERNAL_STREAM_ENCODING_REQUEST \
-  (grpc_static_slice_table[18])
+#define GRPC_MDSTR_GRPC_INTERNAL_STREAM_ENCODING_REQUEST (grpc_static_slice_table[18])
 /* "user-agent" */
 #define GRPC_MDSTR_USER_AGENT (grpc_static_slice_table[19])
 /* "host" */
@@ -85,14 +84,11 @@ extern const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT];
 /* "grpc.timeout" */
 #define GRPC_MDSTR_GRPC_DOT_TIMEOUT (grpc_static_slice_table[25])
 /* "grpc.max_request_message_bytes" */
-#define GRPC_MDSTR_GRPC_DOT_MAX_REQUEST_MESSAGE_BYTES \
-  (grpc_static_slice_table[26])
+#define GRPC_MDSTR_GRPC_DOT_MAX_REQUEST_MESSAGE_BYTES (grpc_static_slice_table[26])
 /* "grpc.max_response_message_bytes" */
-#define GRPC_MDSTR_GRPC_DOT_MAX_RESPONSE_MESSAGE_BYTES \
-  (grpc_static_slice_table[27])
+#define GRPC_MDSTR_GRPC_DOT_MAX_RESPONSE_MESSAGE_BYTES (grpc_static_slice_table[27])
 /* "/grpc.lb.v1.LoadBalancer/BalanceLoad" */
-#define GRPC_MDSTR_SLASH_GRPC_DOT_LB_DOT_V1_DOT_LOADBALANCER_SLASH_BALANCELOAD \
-  (grpc_static_slice_table[28])
+#define GRPC_MDSTR_SLASH_GRPC_DOT_LB_DOT_V1_DOT_LOADBALANCER_SLASH_BALANCELOAD (grpc_static_slice_table[28])
 /* "message/deflate" */
 #define GRPC_MDSTR_MESSAGE_SLASH_DEFLATE (grpc_static_slice_table[29])
 /* "message/gzip" */
@@ -240,15 +236,12 @@ extern const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT];
 /* "deflate,gzip" */
 #define GRPC_MDSTR_DEFLATE_COMMA_GZIP (grpc_static_slice_table[101])
 /* "identity,deflate,gzip" */
-#define GRPC_MDSTR_IDENTITY_COMMA_DEFLATE_COMMA_GZIP \
-  (grpc_static_slice_table[102])
+#define GRPC_MDSTR_IDENTITY_COMMA_DEFLATE_COMMA_GZIP (grpc_static_slice_table[102])
 
 extern const grpc_slice_refcount_vtable grpc_static_metadata_vtable;
-extern grpc_slice_refcount
-    grpc_static_metadata_refcounts[GRPC_STATIC_MDSTR_COUNT];
+extern grpc_slice_refcount grpc_static_metadata_refcounts[GRPC_STATIC_MDSTR_COUNT];
 #define GRPC_IS_STATIC_METADATA_STRING(slice) \
-  ((slice).refcount != NULL &&                \
-   (slice).refcount->vtable == &grpc_static_metadata_vtable)
+  ((slice).refcount != NULL && (slice).refcount->vtable == &grpc_static_metadata_vtable)
 
 #define GRPC_STATIC_METADATA_INDEX(static_slice) \
   ((int)((static_slice).refcount - grpc_static_metadata_refcounts))
@@ -257,263 +250,177 @@ extern grpc_slice_refcount
 extern grpc_mdelem_data grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT];
 extern uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT];
 /* "grpc-status": "0" */
-#define GRPC_MDELEM_GRPC_STATUS_0 \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[0], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_GRPC_STATUS_0 (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[0], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-status": "1" */
-#define GRPC_MDELEM_GRPC_STATUS_1 \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[1], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_GRPC_STATUS_1 (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[1], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-status": "2" */
-#define GRPC_MDELEM_GRPC_STATUS_2 \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[2], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_GRPC_STATUS_2 (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[2], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-encoding": "identity" */
-#define GRPC_MDELEM_GRPC_ENCODING_IDENTITY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[3], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_GRPC_ENCODING_IDENTITY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[3], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-encoding": "gzip" */
-#define GRPC_MDELEM_GRPC_ENCODING_GZIP \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[4], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_GRPC_ENCODING_GZIP (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[4], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-encoding": "deflate" */
-#define GRPC_MDELEM_GRPC_ENCODING_DEFLATE \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[5], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_GRPC_ENCODING_DEFLATE (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[5], GRPC_MDELEM_STORAGE_STATIC))
 /* "te": "trailers" */
-#define GRPC_MDELEM_TE_TRAILERS \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[6], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_TE_TRAILERS (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[6], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-type": "application/grpc" */
-#define GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[7], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[7], GRPC_MDELEM_STORAGE_STATIC))
 /* ":method": "POST" */
-#define GRPC_MDELEM_METHOD_POST \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[8], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_METHOD_POST (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[8], GRPC_MDELEM_STORAGE_STATIC))
 /* ":status": "200" */
-#define GRPC_MDELEM_STATUS_200 \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[9], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_STATUS_200 (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[9], GRPC_MDELEM_STORAGE_STATIC))
 /* ":status": "404" */
-#define GRPC_MDELEM_STATUS_404 \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[10], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_STATUS_404 (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[10], GRPC_MDELEM_STORAGE_STATIC))
 /* ":scheme": "http" */
-#define GRPC_MDELEM_SCHEME_HTTP \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[11], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_SCHEME_HTTP (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[11], GRPC_MDELEM_STORAGE_STATIC))
 /* ":scheme": "https" */
-#define GRPC_MDELEM_SCHEME_HTTPS \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[12], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_SCHEME_HTTPS (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[12], GRPC_MDELEM_STORAGE_STATIC))
 /* ":scheme": "grpc" */
-#define GRPC_MDELEM_SCHEME_GRPC \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[13], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_SCHEME_GRPC (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[13], GRPC_MDELEM_STORAGE_STATIC))
 /* ":authority": "" */
-#define GRPC_MDELEM_AUTHORITY_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[14], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_AUTHORITY_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[14], GRPC_MDELEM_STORAGE_STATIC))
 /* ":method": "GET" */
-#define GRPC_MDELEM_METHOD_GET \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[15], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_METHOD_GET (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[15], GRPC_MDELEM_STORAGE_STATIC))
 /* ":method": "PUT" */
-#define GRPC_MDELEM_METHOD_PUT \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[16], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_METHOD_PUT (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[16], GRPC_MDELEM_STORAGE_STATIC))
 /* ":path": "/" */
-#define GRPC_MDELEM_PATH_SLASH \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[17], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_PATH_SLASH (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[17], GRPC_MDELEM_STORAGE_STATIC))
 /* ":path": "/index.html" */
-#define GRPC_MDELEM_PATH_SLASH_INDEX_DOT_HTML \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[18], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_PATH_SLASH_INDEX_DOT_HTML (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[18], GRPC_MDELEM_STORAGE_STATIC))
 /* ":status": "204" */
-#define GRPC_MDELEM_STATUS_204 \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[19], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_STATUS_204 (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[19], GRPC_MDELEM_STORAGE_STATIC))
 /* ":status": "206" */
-#define GRPC_MDELEM_STATUS_206 \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[20], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_STATUS_206 (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[20], GRPC_MDELEM_STORAGE_STATIC))
 /* ":status": "304" */
-#define GRPC_MDELEM_STATUS_304 \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[21], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_STATUS_304 (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[21], GRPC_MDELEM_STORAGE_STATIC))
 /* ":status": "400" */
-#define GRPC_MDELEM_STATUS_400 \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[22], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_STATUS_400 (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[22], GRPC_MDELEM_STORAGE_STATIC))
 /* ":status": "500" */
-#define GRPC_MDELEM_STATUS_500 \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[23], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_STATUS_500 (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[23], GRPC_MDELEM_STORAGE_STATIC))
 /* "accept-charset": "" */
-#define GRPC_MDELEM_ACCEPT_CHARSET_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[24], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_ACCEPT_CHARSET_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[24], GRPC_MDELEM_STORAGE_STATIC))
 /* "accept-encoding": "" */
-#define GRPC_MDELEM_ACCEPT_ENCODING_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[25], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_ACCEPT_ENCODING_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[25], GRPC_MDELEM_STORAGE_STATIC))
 /* "accept-encoding": "gzip, deflate" */
-#define GRPC_MDELEM_ACCEPT_ENCODING_GZIP_COMMA_DEFLATE \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[26], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_ACCEPT_ENCODING_GZIP_COMMA_DEFLATE (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[26], GRPC_MDELEM_STORAGE_STATIC))
 /* "accept-language": "" */
-#define GRPC_MDELEM_ACCEPT_LANGUAGE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[27], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_ACCEPT_LANGUAGE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[27], GRPC_MDELEM_STORAGE_STATIC))
 /* "accept-ranges": "" */
-#define GRPC_MDELEM_ACCEPT_RANGES_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[28], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_ACCEPT_RANGES_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[28], GRPC_MDELEM_STORAGE_STATIC))
 /* "accept": "" */
-#define GRPC_MDELEM_ACCEPT_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[29], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_ACCEPT_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[29], GRPC_MDELEM_STORAGE_STATIC))
 /* "access-control-allow-origin": "" */
-#define GRPC_MDELEM_ACCESS_CONTROL_ALLOW_ORIGIN_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[30], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_ACCESS_CONTROL_ALLOW_ORIGIN_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[30], GRPC_MDELEM_STORAGE_STATIC))
 /* "age": "" */
-#define GRPC_MDELEM_AGE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[31], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_AGE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[31], GRPC_MDELEM_STORAGE_STATIC))
 /* "allow": "" */
-#define GRPC_MDELEM_ALLOW_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[32], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_ALLOW_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[32], GRPC_MDELEM_STORAGE_STATIC))
 /* "authorization": "" */
-#define GRPC_MDELEM_AUTHORIZATION_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[33], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_AUTHORIZATION_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[33], GRPC_MDELEM_STORAGE_STATIC))
 /* "cache-control": "" */
-#define GRPC_MDELEM_CACHE_CONTROL_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[34], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_CACHE_CONTROL_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[34], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-disposition": "" */
-#define GRPC_MDELEM_CONTENT_DISPOSITION_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[35], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_CONTENT_DISPOSITION_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[35], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-encoding": "identity" */
-#define GRPC_MDELEM_CONTENT_ENCODING_IDENTITY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[36], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_CONTENT_ENCODING_IDENTITY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[36], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-encoding": "gzip" */
-#define GRPC_MDELEM_CONTENT_ENCODING_GZIP \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[37], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_CONTENT_ENCODING_GZIP (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[37], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-encoding": "" */
-#define GRPC_MDELEM_CONTENT_ENCODING_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[38], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_CONTENT_ENCODING_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[38], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-language": "" */
-#define GRPC_MDELEM_CONTENT_LANGUAGE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[39], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_CONTENT_LANGUAGE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[39], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-length": "" */
-#define GRPC_MDELEM_CONTENT_LENGTH_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[40], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_CONTENT_LENGTH_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[40], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-location": "" */
-#define GRPC_MDELEM_CONTENT_LOCATION_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[41], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_CONTENT_LOCATION_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[41], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-range": "" */
-#define GRPC_MDELEM_CONTENT_RANGE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[42], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_CONTENT_RANGE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[42], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-type": "" */
-#define GRPC_MDELEM_CONTENT_TYPE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[43], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_CONTENT_TYPE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[43], GRPC_MDELEM_STORAGE_STATIC))
 /* "cookie": "" */
-#define GRPC_MDELEM_COOKIE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[44], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_COOKIE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[44], GRPC_MDELEM_STORAGE_STATIC))
 /* "date": "" */
-#define GRPC_MDELEM_DATE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[45], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_DATE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[45], GRPC_MDELEM_STORAGE_STATIC))
 /* "etag": "" */
-#define GRPC_MDELEM_ETAG_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[46], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_ETAG_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[46], GRPC_MDELEM_STORAGE_STATIC))
 /* "expect": "" */
-#define GRPC_MDELEM_EXPECT_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[47], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_EXPECT_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[47], GRPC_MDELEM_STORAGE_STATIC))
 /* "expires": "" */
-#define GRPC_MDELEM_EXPIRES_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[48], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_EXPIRES_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[48], GRPC_MDELEM_STORAGE_STATIC))
 /* "from": "" */
-#define GRPC_MDELEM_FROM_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[49], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_FROM_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[49], GRPC_MDELEM_STORAGE_STATIC))
 /* "host": "" */
-#define GRPC_MDELEM_HOST_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[50], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_HOST_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[50], GRPC_MDELEM_STORAGE_STATIC))
 /* "if-match": "" */
-#define GRPC_MDELEM_IF_MATCH_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[51], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_IF_MATCH_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[51], GRPC_MDELEM_STORAGE_STATIC))
 /* "if-modified-since": "" */
-#define GRPC_MDELEM_IF_MODIFIED_SINCE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[52], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_IF_MODIFIED_SINCE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[52], GRPC_MDELEM_STORAGE_STATIC))
 /* "if-none-match": "" */
-#define GRPC_MDELEM_IF_NONE_MATCH_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[53], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_IF_NONE_MATCH_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[53], GRPC_MDELEM_STORAGE_STATIC))
 /* "if-range": "" */
-#define GRPC_MDELEM_IF_RANGE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[54], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_IF_RANGE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[54], GRPC_MDELEM_STORAGE_STATIC))
 /* "if-unmodified-since": "" */
-#define GRPC_MDELEM_IF_UNMODIFIED_SINCE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[55], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_IF_UNMODIFIED_SINCE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[55], GRPC_MDELEM_STORAGE_STATIC))
 /* "last-modified": "" */
-#define GRPC_MDELEM_LAST_MODIFIED_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[56], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_LAST_MODIFIED_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[56], GRPC_MDELEM_STORAGE_STATIC))
 /* "lb-token": "" */
-#define GRPC_MDELEM_LB_TOKEN_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[57], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_LB_TOKEN_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[57], GRPC_MDELEM_STORAGE_STATIC))
 /* "lb-cost-bin": "" */
-#define GRPC_MDELEM_LB_COST_BIN_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[58], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_LB_COST_BIN_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[58], GRPC_MDELEM_STORAGE_STATIC))
 /* "link": "" */
-#define GRPC_MDELEM_LINK_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[59], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_LINK_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[59], GRPC_MDELEM_STORAGE_STATIC))
 /* "location": "" */
-#define GRPC_MDELEM_LOCATION_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[60], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_LOCATION_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[60], GRPC_MDELEM_STORAGE_STATIC))
 /* "max-forwards": "" */
-#define GRPC_MDELEM_MAX_FORWARDS_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[61], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_MAX_FORWARDS_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[61], GRPC_MDELEM_STORAGE_STATIC))
 /* "proxy-authenticate": "" */
-#define GRPC_MDELEM_PROXY_AUTHENTICATE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[62], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_PROXY_AUTHENTICATE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[62], GRPC_MDELEM_STORAGE_STATIC))
 /* "proxy-authorization": "" */
-#define GRPC_MDELEM_PROXY_AUTHORIZATION_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[63], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_PROXY_AUTHORIZATION_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[63], GRPC_MDELEM_STORAGE_STATIC))
 /* "range": "" */
-#define GRPC_MDELEM_RANGE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[64], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_RANGE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[64], GRPC_MDELEM_STORAGE_STATIC))
 /* "referer": "" */
-#define GRPC_MDELEM_REFERER_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[65], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_REFERER_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[65], GRPC_MDELEM_STORAGE_STATIC))
 /* "refresh": "" */
-#define GRPC_MDELEM_REFRESH_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[66], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_REFRESH_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[66], GRPC_MDELEM_STORAGE_STATIC))
 /* "retry-after": "" */
-#define GRPC_MDELEM_RETRY_AFTER_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[67], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_RETRY_AFTER_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[67], GRPC_MDELEM_STORAGE_STATIC))
 /* "server": "" */
-#define GRPC_MDELEM_SERVER_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[68], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_SERVER_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[68], GRPC_MDELEM_STORAGE_STATIC))
 /* "set-cookie": "" */
-#define GRPC_MDELEM_SET_COOKIE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[69], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_SET_COOKIE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[69], GRPC_MDELEM_STORAGE_STATIC))
 /* "strict-transport-security": "" */
-#define GRPC_MDELEM_STRICT_TRANSPORT_SECURITY_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[70], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_STRICT_TRANSPORT_SECURITY_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[70], GRPC_MDELEM_STORAGE_STATIC))
 /* "transfer-encoding": "" */
-#define GRPC_MDELEM_TRANSFER_ENCODING_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[71], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_TRANSFER_ENCODING_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[71], GRPC_MDELEM_STORAGE_STATIC))
 /* "user-agent": "" */
-#define GRPC_MDELEM_USER_AGENT_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[72], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_USER_AGENT_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[72], GRPC_MDELEM_STORAGE_STATIC))
 /* "vary": "" */
-#define GRPC_MDELEM_VARY_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[73], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_VARY_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[73], GRPC_MDELEM_STORAGE_STATIC))
 /* "via": "" */
-#define GRPC_MDELEM_VIA_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[74], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_VIA_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[74], GRPC_MDELEM_STORAGE_STATIC))
 /* "www-authenticate": "" */
-#define GRPC_MDELEM_WWW_AUTHENTICATE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[75], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_WWW_AUTHENTICATE_EMPTY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[75], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "identity" */
-#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[76], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[76], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "deflate" */
-#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_DEFLATE \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[77], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_DEFLATE (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[77], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "identity,deflate" */
-#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[78], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[78], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "gzip" */
-#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_GZIP \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[79], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_GZIP (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[79], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "identity,gzip" */
-#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_GZIP \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[80], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_GZIP (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[80], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "deflate,gzip" */
-#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_DEFLATE_COMMA_GZIP \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[81], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_DEFLATE_COMMA_GZIP (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[81], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "identity,deflate,gzip" */
-#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE_COMMA_GZIP \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[82], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE_COMMA_GZIP (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[82], GRPC_MDELEM_STORAGE_STATIC))
 /* "accept-encoding": "identity" */
-#define GRPC_MDELEM_ACCEPT_ENCODING_IDENTITY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[83], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_ACCEPT_ENCODING_IDENTITY (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[83], GRPC_MDELEM_STORAGE_STATIC))
 /* "accept-encoding": "gzip" */
-#define GRPC_MDELEM_ACCEPT_ENCODING_GZIP \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[84], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_ACCEPT_ENCODING_GZIP (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[84], GRPC_MDELEM_STORAGE_STATIC))
 /* "accept-encoding": "identity,gzip" */
-#define GRPC_MDELEM_ACCEPT_ENCODING_IDENTITY_COMMA_GZIP \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[85], GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_ACCEPT_ENCODING_IDENTITY_COMMA_GZIP (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[85], GRPC_MDELEM_STORAGE_STATIC))
 
 grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b);
 typedef enum {
@@ -545,49 +452,39 @@ typedef enum {
 typedef union {
   struct grpc_linked_mdelem *array[GRPC_BATCH_CALLOUTS_COUNT];
   struct {
-    struct grpc_linked_mdelem *path;
-    struct grpc_linked_mdelem *method;
-    struct grpc_linked_mdelem *status;
-    struct grpc_linked_mdelem *authority;
-    struct grpc_linked_mdelem *scheme;
-    struct grpc_linked_mdelem *te;
-    struct grpc_linked_mdelem *grpc_message;
-    struct grpc_linked_mdelem *grpc_status;
-    struct grpc_linked_mdelem *grpc_payload_bin;
-    struct grpc_linked_mdelem *grpc_encoding;
-    struct grpc_linked_mdelem *grpc_accept_encoding;
-    struct grpc_linked_mdelem *grpc_server_stats_bin;
-    struct grpc_linked_mdelem *grpc_tags_bin;
-    struct grpc_linked_mdelem *grpc_trace_bin;
-    struct grpc_linked_mdelem *content_type;
-    struct grpc_linked_mdelem *content_encoding;
-    struct grpc_linked_mdelem *accept_encoding;
-    struct grpc_linked_mdelem *grpc_internal_encoding_request;
-    struct grpc_linked_mdelem *grpc_internal_stream_encoding_request;
-    struct grpc_linked_mdelem *user_agent;
-    struct grpc_linked_mdelem *host;
-    struct grpc_linked_mdelem *lb_token;
+  struct grpc_linked_mdelem *path;
+  struct grpc_linked_mdelem *method;
+  struct grpc_linked_mdelem *status;
+  struct grpc_linked_mdelem *authority;
+  struct grpc_linked_mdelem *scheme;
+  struct grpc_linked_mdelem *te;
+  struct grpc_linked_mdelem *grpc_message;
+  struct grpc_linked_mdelem *grpc_status;
+  struct grpc_linked_mdelem *grpc_payload_bin;
+  struct grpc_linked_mdelem *grpc_encoding;
+  struct grpc_linked_mdelem *grpc_accept_encoding;
+  struct grpc_linked_mdelem *grpc_server_stats_bin;
+  struct grpc_linked_mdelem *grpc_tags_bin;
+  struct grpc_linked_mdelem *grpc_trace_bin;
+  struct grpc_linked_mdelem *content_type;
+  struct grpc_linked_mdelem *content_encoding;
+  struct grpc_linked_mdelem *accept_encoding;
+  struct grpc_linked_mdelem *grpc_internal_encoding_request;
+  struct grpc_linked_mdelem *grpc_internal_stream_encoding_request;
+  struct grpc_linked_mdelem *user_agent;
+  struct grpc_linked_mdelem *host;
+  struct grpc_linked_mdelem *lb_token;
   } named;
 } grpc_metadata_batch_callouts;
 
-#define GRPC_BATCH_INDEX_OF(slice)                      \
-  (GRPC_IS_STATIC_METADATA_STRING((slice))              \
-       ? (grpc_metadata_batch_callouts_index)GPR_CLAMP( \
-             GRPC_STATIC_METADATA_INDEX((slice)), 0,    \
-             GRPC_BATCH_CALLOUTS_COUNT)                 \
-       : GRPC_BATCH_CALLOUTS_COUNT)
+#define GRPC_BATCH_INDEX_OF(slice) \
+  (GRPC_IS_STATIC_METADATA_STRING((slice)) ? (grpc_metadata_batch_callouts_index)GPR_CLAMP(GRPC_STATIC_METADATA_INDEX((slice)), 0, GRPC_BATCH_CALLOUTS_COUNT) : GRPC_BATCH_CALLOUTS_COUNT)
 
 extern bool grpc_static_callout_is_default[GRPC_BATCH_CALLOUTS_COUNT];
 
 extern const uint8_t grpc_static_accept_encoding_metadata[8];
-#define GRPC_MDELEM_ACCEPT_ENCODING_FOR_ALGORITHMS(algs)                       \
-  (GRPC_MAKE_MDELEM(                                                           \
-      &grpc_static_mdelem_table[grpc_static_accept_encoding_metadata[(algs)]], \
-      GRPC_MDELEM_STORAGE_STATIC))
+#define GRPC_MDELEM_ACCEPT_ENCODING_FOR_ALGORITHMS(algs) (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[grpc_static_accept_encoding_metadata[(algs)]], GRPC_MDELEM_STORAGE_STATIC))
 
 extern const uint8_t grpc_static_accept_stream_encoding_metadata[4];
-#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))
+#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))
 #endif /* GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H */
diff --git a/src/core/lib/transport/status_conversion.c b/src/core/lib/transport/status_conversion.c
index 9a76977e4b..a40d333284 100644
--- a/src/core/lib/transport/status_conversion.c
+++ b/src/core/lib/transport/status_conversion.c
@@ -18,7 +18,7 @@
 
 #include "src/core/lib/transport/status_conversion.h"
 
-int grpc_status_to_http2_error(grpc_status_code status) {
+grpc_http2_error_code grpc_status_to_http2_error(grpc_status_code status) {
   switch (status) {
     case GRPC_STATUS_OK:
       return GRPC_HTTP2_NO_ERROR;
diff --git a/src/core/lib/transport/transport.c b/src/core/lib/transport/transport.c
index caa11a956e..682a820b48 100644
--- a/src/core/lib/transport/transport.c
+++ b/src/core/lib/transport/transport.c
@@ -102,8 +102,11 @@ static void slice_stream_unref(grpc_exec_ctx *exec_ctx, void *p) {
 grpc_slice grpc_slice_from_stream_owned_buffer(grpc_stream_refcount *refcount,
                                                void *buffer, size_t length) {
   slice_stream_ref(&refcount->slice_refcount);
-  return (grpc_slice){.refcount = &refcount->slice_refcount,
-                      .data.refcounted = {.bytes = buffer, .length = length}};
+  grpc_slice res;
+  res.refcount = &refcount->slice_refcount,
+  res.data.refcounted.bytes = (uint8_t *)buffer;
+  res.data.refcounted.length = length;
+  return res;
 }
 
 static const grpc_slice_refcount_vtable stream_ref_slice_vtable = {
diff --git a/src/core/lib/transport/transport_op_string.c b/src/core/lib/transport/transport_op_string.c
index 409a6c4103..858664715c 100644
--- a/src/core/lib/transport/transport_op_string.c
+++ b/src/core/lib/transport/transport_op_string.c
@@ -197,7 +197,7 @@ char *grpc_transport_op_string(grpc_transport_op *op) {
   return out;
 }
 
-void grpc_call_log_op(char *file, int line, gpr_log_severity severity,
+void grpc_call_log_op(const char *file, int line, gpr_log_severity severity,
                       grpc_call_element *elem,
                       grpc_transport_stream_op_batch *op) {
   char *str = grpc_transport_stream_op_batch_string(op);
diff --git a/src/core/tsi/fake_transport_security.c b/src/core/tsi/fake_transport_security.c
index e7b3be3d86..64043fea08 100644
--- a/src/core/tsi/fake_transport_security.c
+++ b/src/core/tsi/fake_transport_security.c
@@ -493,7 +493,8 @@ static tsi_result fake_handshaker_result_extract_peer(
 }
 
 static tsi_result fake_handshaker_result_create_zero_copy_grpc_protector(
-    const tsi_handshaker_result *self, size_t *max_output_protected_frame_size,
+    void *exec_ctx, 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/ssl_transport_security.c b/src/core/tsi/ssl_transport_security.c
index 1fd65928f9..7ebf9dd96f 100644
--- a/src/core/tsi/ssl_transport_security.c
+++ b/src/core/tsi/ssl_transport_security.c
@@ -67,7 +67,13 @@
 
 /* --- Structure definitions. ---*/
 
+struct tsi_ssl_handshaker_factory {
+  const tsi_ssl_handshaker_factory_vtable *vtable;
+  gpr_refcount refcount;
+};
+
 struct tsi_ssl_client_handshaker_factory {
+  tsi_ssl_handshaker_factory base;
   SSL_CTX *ssl_context;
   unsigned char *alpn_protocol_list;
   size_t alpn_protocol_list_length;
@@ -77,6 +83,7 @@ struct tsi_ssl_server_handshaker_factory {
   /* Several contexts to support SNI.
      The tsi_peer array contains the subject names of the server certificates
      associated with the contexts at the same index.  */
+  tsi_ssl_handshaker_factory base;
   SSL_CTX **ssl_contexts;
   tsi_peer *ssl_context_x509_subject_names;
   size_t ssl_context_count;
@@ -90,6 +97,7 @@ typedef struct {
   BIO *into_ssl;
   BIO *from_ssl;
   tsi_result result;
+  tsi_ssl_handshaker_factory *factory_ref;
 } tsi_ssl_handshaker;
 
 typedef struct {
@@ -846,6 +854,47 @@ static const tsi_frame_protector_vtable frame_protector_vtable = {
     ssl_protector_destroy,
 };
 
+/* --- tsi_server_handshaker_factory methods implementation. --- */
+
+static void tsi_ssl_handshaker_factory_destroy(
+    tsi_ssl_handshaker_factory *self) {
+  if (self == NULL) return;
+
+  if (self->vtable != NULL && self->vtable->destroy != NULL) {
+    self->vtable->destroy(self);
+  }
+  /* Note, we don't free(self) here because this object is always directly
+   * embedded in another object. If tsi_ssl_handshaker_factory_init allocates
+   * any memory, it should be free'd here. */
+}
+
+static tsi_ssl_handshaker_factory *tsi_ssl_handshaker_factory_ref(
+    tsi_ssl_handshaker_factory *self) {
+  if (self == NULL) return NULL;
+  gpr_refn(&self->refcount, 1);
+  return self;
+}
+
+static void tsi_ssl_handshaker_factory_unref(tsi_ssl_handshaker_factory *self) {
+  if (self == NULL) return;
+
+  if (gpr_unref(&self->refcount)) {
+    tsi_ssl_handshaker_factory_destroy(self);
+  }
+}
+
+static tsi_ssl_handshaker_factory_vtable handshaker_factory_vtable = {NULL};
+
+/* Initializes a tsi_ssl_handshaker_factory object. Caller is responsible for
+ * allocating memory for the factory. */
+static void tsi_ssl_handshaker_factory_init(
+    tsi_ssl_handshaker_factory *factory) {
+  GPR_ASSERT(factory != NULL);
+
+  factory->vtable = &handshaker_factory_vtable;
+  gpr_ref_init(&factory->refcount, 1);
+}
+
 /* --- tsi_handshaker methods implementation. ---*/
 
 static tsi_result ssl_handshaker_get_bytes_to_send_to_peer(tsi_handshaker *self,
@@ -1013,6 +1062,7 @@ static tsi_result ssl_handshaker_create_frame_protector(
 static void ssl_handshaker_destroy(tsi_handshaker *self) {
   tsi_ssl_handshaker *impl = (tsi_ssl_handshaker *)self;
   SSL_free(impl->ssl); /* The BIO objects are owned by ssl */
+  tsi_ssl_handshaker_factory_unref(impl->factory_ref);
   gpr_free(impl);
 }
 
@@ -1030,6 +1080,7 @@ static const tsi_handshaker_vtable handshaker_vtable = {
 
 static tsi_result create_tsi_ssl_handshaker(SSL_CTX *ctx, int is_client,
                                             const char *server_name_indication,
+                                            tsi_ssl_handshaker_factory *factory,
                                             tsi_handshaker **handshaker) {
   SSL *ssl = SSL_new(ctx);
   BIO *into_ssl = NULL;
@@ -1085,6 +1136,8 @@ static tsi_result create_tsi_ssl_handshaker(SSL_CTX *ctx, int is_client,
   impl->from_ssl = from_ssl;
   impl->result = TSI_HANDSHAKE_IN_PROGRESS;
   impl->base.vtable = &handshaker_vtable;
+  impl->factory_ref = tsi_ssl_handshaker_factory_ref(factory);
+
   *handshaker = &impl->base;
   return TSI_OK;
 }
@@ -1121,11 +1174,20 @@ tsi_result tsi_ssl_client_handshaker_factory_create_handshaker(
     tsi_ssl_client_handshaker_factory *self, const char *server_name_indication,
     tsi_handshaker **handshaker) {
   return create_tsi_ssl_handshaker(self->ssl_context, 1, server_name_indication,
-                                   handshaker);
+                                   &self->base, handshaker);
 }
 
-void tsi_ssl_client_handshaker_factory_destroy(
+void tsi_ssl_client_handshaker_factory_unref(
     tsi_ssl_client_handshaker_factory *self) {
+  if (self == NULL) return;
+  tsi_ssl_handshaker_factory_unref(&self->base);
+}
+
+static void tsi_ssl_client_handshaker_factory_destroy(
+    tsi_ssl_handshaker_factory *factory) {
+  if (factory == NULL) return;
+  tsi_ssl_client_handshaker_factory *self =
+      (tsi_ssl_client_handshaker_factory *)factory;
   if (self->ssl_context != NULL) SSL_CTX_free(self->ssl_context);
   if (self->alpn_protocol_list != NULL) gpr_free(self->alpn_protocol_list);
   gpr_free(self);
@@ -1150,11 +1212,21 @@ tsi_result tsi_ssl_server_handshaker_factory_create_handshaker(
   if (self->ssl_context_count == 0) return TSI_INVALID_ARGUMENT;
   /* Create the handshaker with the first context. We will switch if needed
      because of SNI in ssl_server_handshaker_factory_servername_callback.  */
-  return create_tsi_ssl_handshaker(self->ssl_contexts[0], 0, NULL, handshaker);
+  return create_tsi_ssl_handshaker(self->ssl_contexts[0], 0, NULL, &self->base,
+                                   handshaker);
 }
 
-void tsi_ssl_server_handshaker_factory_destroy(
+void tsi_ssl_server_handshaker_factory_unref(
     tsi_ssl_server_handshaker_factory *self) {
+  if (self == NULL) return;
+  tsi_ssl_handshaker_factory_unref(&self->base);
+}
+
+static void tsi_ssl_server_handshaker_factory_destroy(
+    tsi_ssl_handshaker_factory *factory) {
+  if (factory == NULL) return;
+  tsi_ssl_server_handshaker_factory *self =
+      (tsi_ssl_server_handshaker_factory *)factory;
   size_t i;
   for (i = 0; i < self->ssl_context_count; i++) {
     if (self->ssl_contexts[i] != NULL) {
@@ -1263,6 +1335,9 @@ static int server_handshaker_factory_npn_advertised_callback(
 
 /* --- tsi_ssl_handshaker_factory constructors. --- */
 
+static tsi_ssl_handshaker_factory_vtable client_handshaker_factory_vtable = {
+    tsi_ssl_client_handshaker_factory_destroy};
+
 tsi_result tsi_create_ssl_client_handshaker_factory(
     const tsi_ssl_pem_key_cert_pair *pem_key_cert_pair,
     const char *pem_root_certs, const char *cipher_suites,
@@ -1285,6 +1360,9 @@ tsi_result tsi_create_ssl_client_handshaker_factory(
   }
 
   impl = gpr_zalloc(sizeof(*impl));
+  tsi_ssl_handshaker_factory_init(&impl->base);
+  impl->base.vtable = &client_handshaker_factory_vtable;
+
   impl->ssl_context = ssl_context;
 
   do {
@@ -1322,7 +1400,7 @@ tsi_result tsi_create_ssl_client_handshaker_factory(
     }
   } while (0);
   if (result != TSI_OK) {
-    tsi_ssl_client_handshaker_factory_destroy(impl);
+    tsi_ssl_handshaker_factory_unref(&impl->base);
     return result;
   }
   SSL_CTX_set_verify(ssl_context, SSL_VERIFY_PEER, NULL);
@@ -1332,6 +1410,9 @@ tsi_result tsi_create_ssl_client_handshaker_factory(
   return TSI_OK;
 }
 
+static tsi_ssl_handshaker_factory_vtable server_handshaker_factory_vtable = {
+    tsi_ssl_server_handshaker_factory_destroy};
+
 tsi_result tsi_create_ssl_server_handshaker_factory(
     const tsi_ssl_pem_key_cert_pair *pem_key_cert_pairs,
     size_t num_key_cert_pairs, const char *pem_client_root_certs,
@@ -1364,12 +1445,15 @@ tsi_result tsi_create_ssl_server_handshaker_factory_ex(
   }
 
   impl = gpr_zalloc(sizeof(*impl));
+  tsi_ssl_handshaker_factory_init(&impl->base);
+  impl->base.vtable = &server_handshaker_factory_vtable;
+
   impl->ssl_contexts = gpr_zalloc(num_key_cert_pairs * sizeof(SSL_CTX *));
   impl->ssl_context_x509_subject_names =
       gpr_zalloc(num_key_cert_pairs * sizeof(tsi_peer));
   if (impl->ssl_contexts == NULL ||
       impl->ssl_context_x509_subject_names == NULL) {
-    tsi_ssl_server_handshaker_factory_destroy(impl);
+    tsi_ssl_handshaker_factory_unref(&impl->base);
     return TSI_OUT_OF_RESOURCES;
   }
   impl->ssl_context_count = num_key_cert_pairs;
@@ -1379,7 +1463,7 @@ tsi_result tsi_create_ssl_server_handshaker_factory_ex(
                                            &impl->alpn_protocol_list,
                                            &impl->alpn_protocol_list_length);
     if (result != TSI_OK) {
-      tsi_ssl_server_handshaker_factory_destroy(impl);
+      tsi_ssl_handshaker_factory_unref(&impl->base);
       return result;
     }
   }
@@ -1451,10 +1535,11 @@ tsi_result tsi_create_ssl_server_handshaker_factory_ex(
     } while (0);
 
     if (result != TSI_OK) {
-      tsi_ssl_server_handshaker_factory_destroy(impl);
+      tsi_ssl_handshaker_factory_unref(&impl->base);
       return result;
     }
   }
+
   *factory = impl;
   return TSI_OK;
 }
@@ -1501,3 +1586,15 @@ int tsi_ssl_peer_matches_name(const tsi_peer *peer, const char *name) {
 
   return 0; /* Not found. */
 }
+
+/* --- Testing support. --- */
+const tsi_ssl_handshaker_factory_vtable *tsi_ssl_handshaker_factory_swap_vtable(
+    tsi_ssl_handshaker_factory *factory,
+    tsi_ssl_handshaker_factory_vtable *new_vtable) {
+  GPR_ASSERT(factory != NULL);
+  GPR_ASSERT(factory->vtable != NULL);
+
+  const tsi_ssl_handshaker_factory_vtable *orig_vtable = factory->vtable;
+  factory->vtable = new_vtable;
+  return orig_vtable;
+}
diff --git a/src/core/tsi/ssl_transport_security.h b/src/core/tsi/ssl_transport_security.h
index 177599930b..3abfdf5ed8 100644
--- a/src/core/tsi/ssl_transport_security.h
+++ b/src/core/tsi/ssl_transport_security.h
@@ -96,10 +96,10 @@ tsi_result tsi_ssl_client_handshaker_factory_create_handshaker(
     tsi_ssl_client_handshaker_factory *self, const char *server_name_indication,
     tsi_handshaker **handshaker);
 
-/* Destroys the handshaker factory. WARNING: it is unsafe to destroy a factory
-   while handshakers created with this factory are still in use.  */
-void tsi_ssl_client_handshaker_factory_destroy(
-    tsi_ssl_client_handshaker_factory *self);
+/* Decrements reference count of the handshaker factory. Handshaker factory will
+ * be destroyed once no references exist. */
+void tsi_ssl_client_handshaker_factory_unref(
+    tsi_ssl_client_handshaker_factory *factory);
 
 /* --- tsi_ssl_server_handshaker_factory object ---
 
@@ -158,9 +158,9 @@ tsi_result tsi_create_ssl_server_handshaker_factory_ex(
 tsi_result tsi_ssl_server_handshaker_factory_create_handshaker(
     tsi_ssl_server_handshaker_factory *self, tsi_handshaker **handshaker);
 
-/* Destroys the handshaker factory. WARNING: it is unsafe to destroy a factory
-   while handshakers created with this factory are still in use.  */
-void tsi_ssl_server_handshaker_factory_destroy(
+/* Decrements reference count of the handshaker factory. Handshaker factory will
+ * be destroyed once no references exist. */
+void tsi_ssl_server_handshaker_factory_unref(
     tsi_ssl_server_handshaker_factory *self);
 
 /* Util that checks that an ssl peer matches a specific name.
@@ -170,6 +170,29 @@ void tsi_ssl_server_handshaker_factory_destroy(
    - handle public suffix wildchar more strictly (e.g. *.co.uk) */
 int tsi_ssl_peer_matches_name(const tsi_peer *peer, const char *name);
 
+/* --- Testing support. ---
+
+   These functions and typedefs are not intended to be used outside of testing.
+   */
+
+/* Base type of client and server handshaker factories. */
+typedef struct tsi_ssl_handshaker_factory tsi_ssl_handshaker_factory;
+
+/* Function pointer to handshaker_factory destructor. */
+typedef void (*tsi_ssl_handshaker_factory_destructor)(
+    tsi_ssl_handshaker_factory *factory);
+
+/* Virtual table for tsi_ssl_handshaker_factory. */
+typedef struct {
+  tsi_ssl_handshaker_factory_destructor destroy;
+} tsi_ssl_handshaker_factory_vtable;
+
+/* Set destructor of handshaker_factory to new_destructor, returns previous
+   destructor. */
+const tsi_ssl_handshaker_factory_vtable *tsi_ssl_handshaker_factory_swap_vtable(
+    tsi_ssl_handshaker_factory *factory,
+    tsi_ssl_handshaker_factory_vtable *new_vtable);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/core/tsi/transport_security.h b/src/core/tsi/transport_security.h
index b0d7039850..3bba38149c 100644
--- a/src/core/tsi/transport_security.h
+++ b/src/core/tsi/transport_security.h
@@ -84,11 +84,17 @@ struct tsi_handshaker {
 };
 
 /* Base for tsi_handshaker_result implementations.
-   See transport_security_interface.h for documentation. */
+   See transport_security_interface.h for documentation.
+   The exec_ctx parameter in create_zero_copy_grpc_protector is supposed to be
+   of type grpc_exec_ctx*, but we're using void* instead to avoid making the TSI
+   API depend on grpc. The create_zero_copy_grpc_protector() method is only used
+   in grpc, where we do need the exec_ctx passed through, but the API still
+   needs to compile in other applications, where grpc_exec_ctx is not defined.
+*/
 typedef struct {
   tsi_result (*extract_peer)(const tsi_handshaker_result *self, tsi_peer *peer);
   tsi_result (*create_zero_copy_grpc_protector)(
-      const tsi_handshaker_result *self,
+      void *exec_ctx, 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.c b/src/core/tsi/transport_security_grpc.c
index 773b35e717..affd995230 100644
--- a/src/core/tsi/transport_security_grpc.c
+++ b/src/core/tsi/transport_security_grpc.c
@@ -20,16 +20,18 @@
 
 /* This method creates a tsi_zero_copy_grpc_protector object.  */
 tsi_result tsi_handshaker_result_create_zero_copy_grpc_protector(
-    const tsi_handshaker_result *self, size_t *max_output_protected_frame_size,
+    grpc_exec_ctx *exec_ctx, const tsi_handshaker_result *self,
+    size_t *max_output_protected_frame_size,
     tsi_zero_copy_grpc_protector **protector) {
-  if (self == NULL || self->vtable == NULL || protector == NULL) {
+  if (exec_ctx == NULL || self == NULL || self->vtable == NULL ||
+      protector == NULL) {
     return TSI_INVALID_ARGUMENT;
   }
   if (self->vtable->create_zero_copy_grpc_protector == NULL) {
     return TSI_UNIMPLEMENTED;
   }
   return self->vtable->create_zero_copy_grpc_protector(
-      self, max_output_protected_frame_size, protector);
+      exec_ctx, self, max_output_protected_frame_size, protector);
 }
 
 /* --- tsi_zero_copy_grpc_protector common implementation. ---
diff --git a/src/core/tsi/transport_security_grpc.h b/src/core/tsi/transport_security_grpc.h
index 375a758888..ca6755c12f 100644
--- a/src/core/tsi/transport_security_grpc.h
+++ b/src/core/tsi/transport_security_grpc.h
@@ -30,7 +30,8 @@ extern "C" {
    assuming there is no fatal error.
    The caller is responsible for destroying the protector.  */
 tsi_result tsi_handshaker_result_create_zero_copy_grpc_protector(
-    const tsi_handshaker_result *self, size_t *max_output_protected_frame_size,
+    grpc_exec_ctx *exec_ctx, const tsi_handshaker_result *self,
+    size_t *max_output_protected_frame_size,
     tsi_zero_copy_grpc_protector **protector);
 
 /* -- tsi_zero_copy_grpc_protector object --  */
diff --git a/src/cpp/client/client_context.cc b/src/cpp/client/client_context.cc
index 3af8bdc11a..40e95f3c05 100644
--- a/src/cpp/client/client_context.cc
+++ b/src/cpp/client/client_context.cc
@@ -96,7 +96,7 @@ void ClientContext::set_call(grpc_call* call,
 
 void ClientContext::set_compression_algorithm(
     grpc_compression_algorithm algorithm) {
-  char* algorithm_name = nullptr;
+  const char* algorithm_name = nullptr;
   if (!grpc_compression_algorithm_name(algorithm, &algorithm_name)) {
     gpr_log(GPR_ERROR, "Name for compression algorithm '%d' unknown.",
             algorithm);
diff --git a/src/cpp/client/generic_stub.cc b/src/cpp/client/generic_stub.cc
index 66b1ef0e39..693b8bea56 100644
--- a/src/cpp/client/generic_stub.cc
+++ b/src/cpp/client/generic_stub.cc
@@ -22,14 +22,39 @@
 
 namespace grpc {
 
+namespace {
+std::unique_ptr<GenericClientAsyncReaderWriter> CallInternal(
+    ChannelInterface* channel, ClientContext* context,
+    const grpc::string& method, CompletionQueue* cq, bool start, void* tag) {
+  return std::unique_ptr<GenericClientAsyncReaderWriter>(
+      GenericClientAsyncReaderWriter::Create(
+          channel, cq, RpcMethod(method.c_str(), RpcMethod::BIDI_STREAMING),
+          context, start, tag));
+}
+
+}  // namespace
+
 // begin a call to a named method
 std::unique_ptr<GenericClientAsyncReaderWriter> GenericStub::Call(
     ClientContext* context, const grpc::string& method, CompletionQueue* cq,
     void* tag) {
-  return std::unique_ptr<GenericClientAsyncReaderWriter>(
-      GenericClientAsyncReaderWriter::Create(
-          channel_.get(), cq,
-          RpcMethod(method.c_str(), RpcMethod::BIDI_STREAMING), context, tag));
+  return CallInternal(channel_.get(), context, method, cq, true, tag);
+}
+
+// setup a call to a named method
+std::unique_ptr<GenericClientAsyncReaderWriter> GenericStub::PrepareCall(
+    ClientContext* context, const grpc::string& method, CompletionQueue* cq) {
+  return CallInternal(channel_.get(), context, method, cq, false, nullptr);
+}
+
+// setup a unary call to a named method
+std::unique_ptr<GenericClientAsyncResponseReader> GenericStub::PrepareUnaryCall(
+    ClientContext* context, const grpc::string& method,
+    const ByteBuffer& request, CompletionQueue* cq) {
+  return std::unique_ptr<GenericClientAsyncResponseReader>(
+      GenericClientAsyncResponseReader::Create(
+          channel_.get(), cq, RpcMethod(method.c_str(), RpcMethod::NORMAL_RPC),
+          context, request, false));
 }
 
 }  // namespace grpc
diff --git a/src/cpp/server/health/default_health_check_service.cc b/src/cpp/server/health/default_health_check_service.cc
index 815b607032..d2cba6d662 100644
--- a/src/cpp/server/health/default_health_check_service.cc
+++ b/src/cpp/server/health/default_health_check_service.cc
@@ -20,6 +20,7 @@
 #include <mutex>
 
 #include <grpc++/impl/codegen/method_handler_impl.h>
+#include <grpc/slice.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 
diff --git a/src/cpp/server/server_context.cc b/src/cpp/server/server_context.cc
index 4913682f1d..d7876a000b 100644
--- a/src/cpp/server/server_context.cc
+++ b/src/cpp/server/server_context.cc
@@ -190,7 +190,7 @@ bool ServerContext::IsCancelled() const {
 
 void ServerContext::set_compression_algorithm(
     grpc_compression_algorithm algorithm) {
-  char* algorithm_name = NULL;
+  const char* algorithm_name = NULL;
   if (!grpc_compression_algorithm_name(algorithm, &algorithm_name)) {
     gpr_log(GPR_ERROR, "Name for compression algorithm '%d' unknown.",
             algorithm);
diff --git a/src/cpp/util/byte_buffer_cc.cc b/src/cpp/util/byte_buffer_cc.cc
index b1ff25252a..180c813762 100644
--- a/src/cpp/util/byte_buffer_cc.cc
+++ b/src/cpp/util/byte_buffer_cc.cc
@@ -16,11 +16,15 @@
  *
  */
 
+#include <grpc++/impl/grpc_library.h>
 #include <grpc++/support/byte_buffer.h>
+#include <grpc/byte_buffer.h>
 #include <grpc/byte_buffer_reader.h>
 
 namespace grpc {
 
+static internal::GrpcLibraryInitializer g_gli_initializer;
+
 ByteBuffer::ByteBuffer(const Slice* slices, size_t nslices) {
   // The following assertions check that the representation of a grpc::Slice is
   // identical to that of a grpc_slice:  it has a grpc_slice field, and nothing
@@ -29,6 +33,16 @@ ByteBuffer::ByteBuffer(const Slice* slices, size_t nslices) {
                 "Slice must have same representation as grpc_slice");
   static_assert(sizeof(Slice) == sizeof(grpc_slice),
                 "Slice must have same representation as grpc_slice");
+  // The following assertions check that the representation of a ByteBuffer is
+  // identical to grpc_byte_buffer*:  it has a grpc_byte_buffer* field,
+  // and nothing else.
+  static_assert(std::is_same<decltype(buffer_), grpc_byte_buffer*>::value,
+                "ByteBuffer must have same representation as "
+                "grpc_byte_buffer*");
+  static_assert(sizeof(ByteBuffer) == sizeof(grpc_byte_buffer*),
+                "ByteBuffer must have same representation as "
+                "grpc_byte_buffer*");
+  g_gli_initializer.summon();  // Make sure that initializer linked in
   // The const_cast is legal if grpc_raw_byte_buffer_create() does no more
   // than its advertised side effect of increasing the reference count of the
   // slices it processes, and such an increase does not affect the semantics
@@ -37,19 +51,6 @@ ByteBuffer::ByteBuffer(const Slice* slices, size_t nslices) {
       reinterpret_cast<grpc_slice*>(const_cast<Slice*>(slices)), nslices);
 }
 
-ByteBuffer::~ByteBuffer() {
-  if (buffer_) {
-    grpc_byte_buffer_destroy(buffer_);
-  }
-}
-
-void ByteBuffer::Clear() {
-  if (buffer_) {
-    grpc_byte_buffer_destroy(buffer_);
-    buffer_ = nullptr;
-  }
-}
-
 Status ByteBuffer::Dump(std::vector<Slice>* slices) const {
   slices->clear();
   if (!buffer_) {
@@ -80,7 +81,9 @@ ByteBuffer::ByteBuffer(const ByteBuffer& buf)
     : buffer_(grpc_byte_buffer_copy(buf.buffer_)) {}
 
 ByteBuffer& ByteBuffer::operator=(const ByteBuffer& buf) {
-  Clear();  // first remove existing data
+  if (this != &buf) {
+    Clear();  // first remove existing data
+  }
   if (buf.buffer_) {
     buffer_ = grpc_byte_buffer_copy(buf.buffer_);  // then copy
   }
diff --git a/src/cpp/util/slice_cc.cc b/src/cpp/util/slice_cc.cc
index 486d0cdf0e..3ae17e8052 100644
--- a/src/cpp/util/slice_cc.cc
+++ b/src/cpp/util/slice_cc.cc
@@ -50,4 +50,6 @@ Slice::Slice(void* buf, size_t len, void (*destroy)(void*), void* user_data)
 Slice::Slice(void* buf, size_t len, void (*destroy)(void*, size_t))
     : slice_(grpc_slice_new_with_len(buf, len, destroy)) {}
 
+grpc_slice Slice::c_slice() const { return grpc_slice_ref(slice_); }
+
 }  // namespace grpc
diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.csproj b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
index abf326459c..bbcbd95be5 100755
--- a/src/csharp/Grpc.Auth/Grpc.Auth.csproj
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
@@ -15,7 +15,6 @@
     <PackageTags>gRPC RPC Protocol HTTP/2 Auth OAuth2</PackageTags>
     <PackageProjectUrl>https://github.com/grpc/grpc</PackageProjectUrl>
     <PackageLicenseUrl>https://github.com/grpc/grpc/blob/master/LICENSE</PackageLicenseUrl>
-    <NetStandardImplicitPackageVersion Condition=" '$(TargetFramework)' == 'netstandard1.5' ">1.6.0</NetStandardImplicitPackageVersion>
     <IncludeSymbols>true</IncludeSymbols>
     <IncludeSource>true</IncludeSource>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/src/csharp/Grpc.Core.Testing/Grpc.Core.Testing.csproj b/src/csharp/Grpc.Core.Testing/Grpc.Core.Testing.csproj
index 9ad6fd0c61..4d6767fa98 100755
--- a/src/csharp/Grpc.Core.Testing/Grpc.Core.Testing.csproj
+++ b/src/csharp/Grpc.Core.Testing/Grpc.Core.Testing.csproj
@@ -15,7 +15,6 @@
     <PackageTags>gRPC test testing</PackageTags>
     <PackageProjectUrl>https://github.com/grpc/grpc</PackageProjectUrl>
     <PackageLicenseUrl>https://github.com/grpc/grpc/blob/master/LICENSE</PackageLicenseUrl>
-    <NetStandardImplicitPackageVersion Condition=" '$(TargetFramework)' == 'netstandard1.5' ">1.6.0</NetStandardImplicitPackageVersion>
     <IncludeSymbols>true</IncludeSymbols>
     <IncludeSource>true</IncludeSource>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
index 6df68fda58..18993a93e0 100755
--- a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
+++ b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
@@ -8,8 +8,6 @@
     <AssemblyName>Grpc.Core.Tests</AssemblyName>
     <OutputType>Exe</OutputType>
     <PackageId>Grpc.Core.Tests</PackageId>
-    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
@@ -21,7 +19,6 @@
     <PackageReference Include="Newtonsoft.Json" Version="9.0.1" />
     <PackageReference Include="NUnit" Version="3.6.0" />
     <PackageReference Include="NUnitLite" Version="3.6.0" />
-    <PackageReference Include="NUnit.ConsoleRunner" Version="3.6.0" />
     <PackageReference Include="OpenCover" Version="4.6.519" />
     <PackageReference Include="ReportGenerator" Version="2.4.4.0" />
   </ItemGroup>
diff --git a/src/csharp/Grpc.Core/Grpc.Core.csproj b/src/csharp/Grpc.Core/Grpc.Core.csproj
index dde800aadd..d9950b2f20 100755
--- a/src/csharp/Grpc.Core/Grpc.Core.csproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.csproj
@@ -14,7 +14,6 @@
     <PackageTags>gRPC RPC Protocol HTTP/2</PackageTags>
     <PackageProjectUrl>https://github.com/grpc/grpc</PackageProjectUrl>
     <PackageLicenseUrl>https://github.com/grpc/grpc/blob/master/LICENSE</PackageLicenseUrl>
-    <NetStandardImplicitPackageVersion Condition=" '$(TargetFramework)' == 'netstandard1.5' ">1.6.0</NetStandardImplicitPackageVersion>
     <IncludeSymbols>true</IncludeSymbols>
     <IncludeSource>true</IncludeSource>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -65,7 +64,7 @@
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.5' ">
     <PackageReference Include="System.Runtime.Loader" Version="4.0.0" />
     <PackageReference Include="System.Threading.Thread" Version="4.0.0" />
-    <PackageReference Include="System.Threading.ThreadPool" Version="4.0.0" />
+    <PackageReference Include="System.Threading.ThreadPool" Version="4.0.10" />
   </ItemGroup>
 
   <Import Project="NativeDeps.csproj.include" />
diff --git a/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.csproj b/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.csproj
index 74deed6584..db4e3ef4e3 100755
--- a/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.csproj
+++ b/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.csproj
@@ -8,7 +8,6 @@
     <AssemblyName>Grpc.Examples.MathClient</AssemblyName>
     <OutputType>Exe</OutputType>
     <PackageId>Grpc.Examples.MathClient</PackageId>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
diff --git a/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.csproj b/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.csproj
index 1abf261498..b12b418d01 100755
--- a/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.csproj
+++ b/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.csproj
@@ -8,7 +8,6 @@
     <AssemblyName>Grpc.Examples.MathServer</AssemblyName>
     <OutputType>Exe</OutputType>
     <PackageId>Grpc.Examples.MathServer</PackageId>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
diff --git a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
index d2a13ed6e1..3ccc9adfaf 100755
--- a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
+++ b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
@@ -8,8 +8,6 @@
     <AssemblyName>Grpc.Examples.Tests</AssemblyName>
     <OutputType>Exe</OutputType>
     <PackageId>Grpc.Examples.Tests</PackageId>
-    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
diff --git a/src/csharp/Grpc.Examples/Grpc.Examples.csproj b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
index 491d313f17..baa3b4ce6c 100755
--- a/src/csharp/Grpc.Examples/Grpc.Examples.csproj
+++ b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
@@ -7,7 +7,6 @@
     <TargetFrameworks>net45;netcoreapp1.0</TargetFrameworks>
     <AssemblyName>Grpc.Examples</AssemblyName>
     <PackageId>Grpc.Examples</PackageId>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
diff --git a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
index 2ccf46b9b9..9da0539dcb 100755
--- a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
+++ b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
@@ -8,8 +8,6 @@
     <AssemblyName>Grpc.HealthCheck.Tests</AssemblyName>
     <OutputType>Exe</OutputType>
     <PackageId>Grpc.HealthCheck.Tests</PackageId>
-    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
diff --git a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
index 3eb90434f3..681719d124 100755
--- a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
+++ b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
@@ -14,7 +14,6 @@
     <PackageTags>gRPC health check</PackageTags>
     <PackageProjectUrl>https://github.com/grpc/grpc</PackageProjectUrl>
     <PackageLicenseUrl>https://github.com/grpc/grpc/blob/master/LICENSE</PackageLicenseUrl>
-    <NetStandardImplicitPackageVersion Condition=" '$(TargetFramework)' == 'netstandard1.5' ">1.6.0</NetStandardImplicitPackageVersion>
     <IncludeSymbols>true</IncludeSymbols>
     <IncludeSource>true</IncludeSource>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
index c67beea7cd..35713156ea 100755
--- a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
@@ -8,8 +8,6 @@
     <AssemblyName>Grpc.IntegrationTesting.Client</AssemblyName>
     <OutputType>Exe</OutputType>
     <PackageId>Grpc.IntegrationTesting.Client</PackageId>
-    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj
index e452257b1b..3ecefe3bc4 100755
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj
@@ -9,8 +9,6 @@
     <OutputType>Exe</OutputType>
     <PackageId>Grpc.IntegrationTesting.QpsWorker</PackageId>
     <ServerGarbageCollection>true</ServerGarbageCollection>
-    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
index a1fb316fdb..1092b2c21e 100755
--- a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
@@ -8,8 +8,6 @@
     <AssemblyName>Grpc.IntegrationTesting.Server</AssemblyName>
     <OutputType>Exe</OutputType>
     <PackageId>Grpc.IntegrationTesting.Server</PackageId>
-    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.csproj b/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.csproj
index f64bea3d2b..22272547f6 100755
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.csproj
@@ -8,8 +8,6 @@
     <AssemblyName>Grpc.IntegrationTesting.StressClient</AssemblyName>
     <OutputType>Exe</OutputType>
     <PackageId>Grpc.IntegrationTesting.StressClient</PackageId>
-    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
diff --git a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
index f5077fe0f7..c02c9844e3 100755
--- a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
+++ b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
@@ -8,8 +8,6 @@
     <AssemblyName>Grpc.IntegrationTesting</AssemblyName>
     <OutputType>Exe</OutputType>
     <PackageId>Grpc.IntegrationTesting</PackageId>
-    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
@@ -31,10 +29,6 @@
     <Reference Include="Microsoft.CSharp" />
   </ItemGroup>
 
-  <ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">
-    <PackageReference Include="System.Linq.Expressions" Version="4.1.1" />
-  </ItemGroup>
-
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs" />
   </ItemGroup>
diff --git a/src/csharp/Grpc.Microbenchmarks/Grpc.Microbenchmarks.csproj b/src/csharp/Grpc.Microbenchmarks/Grpc.Microbenchmarks.csproj
index 17797e1e1e..108357e4eb 100644
--- a/src/csharp/Grpc.Microbenchmarks/Grpc.Microbenchmarks.csproj
+++ b/src/csharp/Grpc.Microbenchmarks/Grpc.Microbenchmarks.csproj
@@ -8,8 +8,6 @@
     <AssemblyName>Grpc.Microbenchmarks</AssemblyName>
     <OutputType>Exe</OutputType>
     <PackageId>Grpc.Microbenchmarks</PackageId>
-    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
diff --git a/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.csproj b/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.csproj
index cf756c68ad..d368697124 100755
--- a/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.csproj
+++ b/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.csproj
@@ -8,8 +8,6 @@
     <AssemblyName>Grpc.Reflection.Tests</AssemblyName>
     <OutputType>Exe</OutputType>
     <PackageId>Grpc.Reflection.Tests</PackageId>
-    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
-    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
diff --git a/src/csharp/Grpc.Reflection/Grpc.Reflection.csproj b/src/csharp/Grpc.Reflection/Grpc.Reflection.csproj
index b77fd69aee..704eea5c17 100755
--- a/src/csharp/Grpc.Reflection/Grpc.Reflection.csproj
+++ b/src/csharp/Grpc.Reflection/Grpc.Reflection.csproj
@@ -14,7 +14,6 @@
     <PackageTags>gRPC reflection</PackageTags>
     <PackageProjectUrl>https://github.com/grpc/grpc</PackageProjectUrl>
     <PackageLicenseUrl>https://github.com/grpc/grpc/blob/master/LICENSE</PackageLicenseUrl>
-    <NetStandardImplicitPackageVersion Condition=" '$(TargetFramework)' == 'netstandard1.5' ">1.6.0</NetStandardImplicitPackageVersion>
     <IncludeSymbols>true</IncludeSymbols>
     <IncludeSource>true</IncludeSource>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/src/csharp/doc/.gitignore b/src/csharp/doc/.gitignore
new file mode 100644
index 0000000000..09ee235efc
--- /dev/null
+++ b/src/csharp/doc/.gitignore
@@ -0,0 +1,2 @@
+html
+obj
diff --git a/src/csharp/doc/README.md b/src/csharp/doc/README.md
index 585500b5ca..46cce013a1 100644
--- a/src/csharp/doc/README.md
+++ b/src/csharp/doc/README.md
@@ -1,2 +1,9 @@
+DocFX-generated C# API Reference
+--------------------------------
 
-SandCastle project files to generate HTML reference documentation.
\ No newline at end of file
+Install docfx based on instructions here: https://github.com/dotnet/docfx
+
+```
+# generate docfx documentation into ./html directory
+$ docfx
+```
diff --git a/src/csharp/doc/docfx.json b/src/csharp/doc/docfx.json
new file mode 100644
index 0000000000..7219d0e7a6
--- /dev/null
+++ b/src/csharp/doc/docfx.json
@@ -0,0 +1,37 @@
+{
+  "metadata": [
+    {
+      "src": [
+        {
+          "files": ["Grpc.Core/Grpc.Core.csproj",
+                    "Grpc.Auth/Grpc.Auth.csproj",
+                    "Grpc.Core.Testing/Grpc.Core.Testing.csproj",
+                    "Grpc.HealthCheck/Grpc.HealthCheck.csproj",
+                    "Grpc.Reflection/Grpc.HealthCheck.csproj"],
+          "exclude": [ "**/bin/**", "**/obj/**" ],
+          "cwd": ".."
+        }
+      ],
+      "properties": { "TargetFramework": "net45" },
+      "dest": "obj/api"
+    }
+  ],
+  "build": {
+    "content": [
+      {
+        "files": [ "**/*.yml" ],
+        "cwd": "obj/api",
+        "dest": "api"
+      },
+      {
+        "files": [ "toc.yml"],
+      }
+    ],
+    "globalMetadata": {
+      "_appTitle": "gRPC C#",
+      "_enableSearch": true,
+      "_disableContribution": true
+    },
+    "dest": "html"
+  }
+}
diff --git a/src/csharp/doc/grpc_csharp_public.shfbproj b/src/csharp/doc/grpc_csharp_public.shfbproj
deleted file mode 100644
index fab953da35..0000000000
--- a/src/csharp/doc/grpc_csharp_public.shfbproj
+++ /dev/null
@@ -1,83 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup>
-    <!-- The configuration and platform will be used to determine which assemblies to include from solution and
-				 project documentation sources -->
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <SchemaVersion>2.0</SchemaVersion>
-    <ProjectGuid>{77e3da09-fc92-486f-a90a-99ca788e8b59}</ProjectGuid>
-    <SHFBSchemaVersion>2015.6.5.0</SHFBSchemaVersion>
-    <!-- AssemblyName, Name, and RootNamespace are not used by SHFB but Visual Studio adds them anyway -->
-    <AssemblyName>Documentation</AssemblyName>
-    <RootNamespace>Documentation</RootNamespace>
-    <Name>Documentation</Name>
-    <!-- SHFB properties -->
-    <FrameworkVersion>.NET Framework 4.5</FrameworkVersion>
-    <OutputPath>..\..\..\doc\ref\csharp\html</OutputPath>
-    <Language>en-US</Language>
-    <DocumentationSources>
-      <DocumentationSource sourceFile="..\Grpc.Auth\Grpc.Auth.csproj" />
-<DocumentationSource sourceFile="..\Grpc.Core\Grpc.Core.csproj" />
-<DocumentationSource sourceFile="..\Grpc.HealthCheck\Grpc.HealthCheck.csproj" />
-<DocumentationSource sourceFile="..\Grpc.Reflection\Grpc.Reflection.csproj" />
-<DocumentationSource sourceFile="..\Grpc.Core.Testing\Grpc.Core.Testing.csproj" /></DocumentationSources>
-    <BuildAssemblerVerbosity>OnlyWarningsAndErrors</BuildAssemblerVerbosity>
-    <HelpFileFormat>Website</HelpFileFormat>
-    <IndentHtml>False</IndentHtml>
-    <KeepLogFile>True</KeepLogFile>
-    <DisableCodeBlockComponent>False</DisableCodeBlockComponent>
-    <CleanIntermediates>True</CleanIntermediates>
-    <HelpFileVersion>1.0.0.0</HelpFileVersion>
-    <MaximumGroupParts>2</MaximumGroupParts>
-    <NamespaceGrouping>False</NamespaceGrouping>
-    <SyntaxFilters>Standard</SyntaxFilters>
-    <SdkLinkTarget>Blank</SdkLinkTarget>
-    <RootNamespaceContainer>True</RootNamespaceContainer>
-    <PresentationStyle>VS2013</PresentationStyle>
-    <Preliminary>False</Preliminary>
-    <NamingMethod>MemberName</NamingMethod>
-    <HelpTitle>gRPC C#</HelpTitle>
-    <ContentPlacement>AboveNamespaces</ContentPlacement>
-    <HtmlHelpName>Documentation</HtmlHelpName>
-    <NamespaceSummaries>
-      <NamespaceSummaryItem name="Grpc.Auth" isDocumented="True">Provides OAuth2 based authentication for gRPC. &lt;c&gt;Grpc.Auth&lt;/c&gt; currently consists of a set of very lightweight wrappers and uses C# &lt;a href="https://www.nuget.org/packages/Google.Apis.Auth/"&gt;Google.Apis.Auth&lt;/a&gt; library.</NamespaceSummaryItem>
-      <NamespaceSummaryItem name="Grpc.Core" isDocumented="True">Main namespace for gRPC C# functionality. Contains concepts representing both client side and server side gRPC logic.
-
-&lt;seealso cref="Grpc.Core.Channel"/&gt; 
-&lt;seealso cref="Grpc.Core.Server"/&gt;</NamespaceSummaryItem>
-      <NamespaceSummaryItem name="Grpc.Core.Logging" isDocumented="True">Provides functionality to redirect gRPC logs to application-specified destination.</NamespaceSummaryItem>
-      <NamespaceSummaryItem name="Grpc.Core.Utils" isDocumented="True">Various utilities for gRPC C#.</NamespaceSummaryItem>
-    </NamespaceSummaries>
-    <MissingTags>Summary, Parameter, AutoDocumentCtors, Namespace, TypeParameter, AutoDocumentDispose</MissingTags>
-  </PropertyGroup>
-  <!-- There are no properties for these groups.  AnyCPU needs to appear in order for Visual Studio to perform
-			 the build.  The others are optional common platform types that may appear. -->
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' ">
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x86' ">
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x64' ">
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x64' ">
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|Win32' ">
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|Win32' ">
-  </PropertyGroup>
-  <!-- Import the SHFB build targets -->
-  <Import Project="$(SHFBROOT)\SandcastleHelpFileBuilder.targets" />
-  <!-- The pre-build and post-build event properties must appear *after* the targets file import in order to be
-			 evaluated correctly. -->
-  <PropertyGroup>
-    <PreBuildEvent>
-    </PreBuildEvent>
-    <PostBuildEvent>
-    </PostBuildEvent>
-    <RunPostBuildEvent>OnBuildSuccess</RunPostBuildEvent>
-  </PropertyGroup>
-</Project>
\ No newline at end of file
diff --git a/src/csharp/doc/toc.yml b/src/csharp/doc/toc.yml
new file mode 100644
index 0000000000..c3a1e415ab
--- /dev/null
+++ b/src/csharp/doc/toc.yml
@@ -0,0 +1,3 @@
+- name: API Documentation
+  href: obj/api/
+  homepage: obj/api/Grpc.Core.yml
diff --git a/src/objective-c/GRPCClient/GRPCCall.h b/src/objective-c/GRPCClient/GRPCCall.h
index 4d90cfd384..df563ca36c 100644
--- a/src/objective-c/GRPCClient/GRPCCall.h
+++ b/src/objective-c/GRPCClient/GRPCCall.h
@@ -170,6 +170,13 @@ extern id const kGRPCTrailersKey;
 @property (atomic, copy, readwrite) NSString *serverName;
 
 /**
+ * The timeout for the RPC call in seconds. If set to 0, the call will not timeout. If set to
+ * positive, the gRPC call returns with status GRPCErrorCodeDeadlineExceeded if it is not completed
+ * within \a timeout seconds. A negative value is not allowed.
+ */
+@property NSTimeInterval timeout;
+
+/**
  * The container of the request headers of an RPC conforms to this protocol, which is a subset of
  * NSMutableDictionary's interface. It will become a NSMutableDictionary later on.
  * The keys of this container are the header names, which per the HTTP standard are case-
diff --git a/src/objective-c/GRPCClient/GRPCCall.m b/src/objective-c/GRPCClient/GRPCCall.m
index 436c19e354..d6c3a3c165 100644
--- a/src/objective-c/GRPCClient/GRPCCall.m
+++ b/src/objective-c/GRPCClient/GRPCCall.m
@@ -423,7 +423,8 @@ static NSString * const kBearerPrefix = @"Bearer ";
 
   _wrappedCall = [[GRPCWrappedCall alloc] initWithHost:_host
                                             serverName:_serverName
-                                                  path:_path];
+                                                  path:_path
+                                               timeout:_timeout];
   NSAssert(_wrappedCall, @"Error allocating RPC objects. Low memory?");
 
   [self sendHeaders:_requestHeaders];
diff --git a/src/objective-c/GRPCClient/private/GRPCChannel.h b/src/objective-c/GRPCClient/private/GRPCChannel.h
index e2aa5bd036..d37182f754 100644
--- a/src/objective-c/GRPCClient/private/GRPCChannel.h
+++ b/src/objective-c/GRPCClient/private/GRPCChannel.h
@@ -63,5 +63,6 @@ struct grpc_channel_credentials;
 
 - (nullable grpc_call *)unmanagedCallWithPath:(nonnull NSString *)path
                                    serverName:(nonnull NSString *)serverName
+                                      timeout:(NSTimeInterval)timeout
                               completionQueue:(nonnull GRPCCompletionQueue *)queue;
 @end
diff --git a/src/objective-c/GRPCClient/private/GRPCChannel.m b/src/objective-c/GRPCClient/private/GRPCChannel.m
index 52dbc70b99..b78b14f2af 100644
--- a/src/objective-c/GRPCClient/private/GRPCChannel.m
+++ b/src/objective-c/GRPCClient/private/GRPCChannel.m
@@ -182,18 +182,28 @@ static grpc_channel_args *BuildChannelArgs(NSDictionary *dictionary) {
 
 - (grpc_call *)unmanagedCallWithPath:(NSString *)path
                           serverName:(NSString *)serverName
+                             timeout:(NSTimeInterval)timeout
                      completionQueue:(GRPCCompletionQueue *)queue {
+  GPR_ASSERT(timeout >= 0);
+  if (timeout < 0) {
+    timeout = 0;
+  }
   grpc_slice host_slice;
   if (serverName) {
     host_slice = grpc_slice_from_copied_string(serverName.UTF8String);
   }
   grpc_slice path_slice = grpc_slice_from_copied_string(path.UTF8String);
+  gpr_timespec deadline_ms = timeout == 0 ?
+                                gpr_inf_future(GPR_CLOCK_REALTIME) :
+                                gpr_time_add(
+                                    gpr_now(GPR_CLOCK_MONOTONIC),
+                                    gpr_time_from_millis((int64_t)(timeout * 1000), GPR_TIMESPAN));
   grpc_call *call = grpc_channel_create_call(_unmanagedChannel,
                                              NULL, GRPC_PROPAGATE_DEFAULTS,
                                              queue.unmanagedQueue,
                                              path_slice,
                                              serverName ? &host_slice : NULL,
-                                             gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+                                             deadline_ms, NULL);
   if (serverName) {
     grpc_slice_unref(host_slice);
   }
diff --git a/src/objective-c/GRPCClient/private/GRPCHost.h b/src/objective-c/GRPCClient/private/GRPCHost.h
index 0c1d715240..58171211b0 100644
--- a/src/objective-c/GRPCClient/private/GRPCHost.h
+++ b/src/objective-c/GRPCClient/private/GRPCHost.h
@@ -55,6 +55,7 @@ struct grpc_channel_credentials;
 /** Create a grpc_call object to the provided path on this host. */
 - (nullable struct grpc_call *)unmanagedCallWithPath:(NSString *)path
                                           serverName:(NSString *)serverName
+                                             timeout:(NSTimeInterval)timeout
                                      completionQueue:(GRPCCompletionQueue *)queue;
 
 // TODO: There's a race when a new RPC is coming through just as an existing one is getting
diff --git a/src/objective-c/GRPCClient/private/GRPCHost.m b/src/objective-c/GRPCClient/private/GRPCHost.m
index 23794c1fed..f73e9cbc50 100644
--- a/src/objective-c/GRPCClient/private/GRPCHost.m
+++ b/src/objective-c/GRPCClient/private/GRPCHost.m
@@ -121,6 +121,7 @@ static GRPCConnectivityMonitor *connectivityMonitor = nil;
 
 - (nullable grpc_call *)unmanagedCallWithPath:(NSString *)path
                                    serverName:(NSString *)serverName
+                                      timeout:(NSTimeInterval)timeout
                               completionQueue:(GRPCCompletionQueue *)queue {
   GRPCChannel *channel;
   // This is racing -[GRPCHost disconnect].
@@ -130,7 +131,10 @@ static GRPCConnectivityMonitor *connectivityMonitor = nil;
     }
     channel = _channel;
   }
-  return [channel unmanagedCallWithPath:path serverName:serverName completionQueue:queue];
+  return [channel unmanagedCallWithPath:path
+                             serverName:serverName
+                                timeout:timeout
+                        completionQueue:queue];
 }
 
 - (BOOL)setTLSPEMRootCerts:(nullable NSString *)pemRootCerts
diff --git a/src/objective-c/GRPCClient/private/GRPCWrappedCall.h b/src/objective-c/GRPCClient/private/GRPCWrappedCall.h
index 64075591a3..1cd9da8f3e 100644
--- a/src/objective-c/GRPCClient/private/GRPCWrappedCall.h
+++ b/src/objective-c/GRPCClient/private/GRPCWrappedCall.h
@@ -76,7 +76,8 @@
 
 - (instancetype)initWithHost:(NSString *)host
                   serverName:(NSString *)serverName
-                        path:(NSString *)path NS_DESIGNATED_INITIALIZER;
+                        path:(NSString *)path
+                     timeout:(NSTimeInterval)timeout NS_DESIGNATED_INITIALIZER;
 
 - (void)startBatchWithOperations:(NSArray *)ops errorHandler:(void(^)())errorHandler;
 
diff --git a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
index 87dc33af88..b0b1223b64 100644
--- a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
+++ b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
@@ -238,12 +238,13 @@
 }
 
 - (instancetype)init {
-  return [self initWithHost:nil serverName:nil path:nil];
+  return [self initWithHost:nil serverName:nil path:nil timeout:0];
 }
 
 - (instancetype)initWithHost:(NSString *)host
                   serverName:(NSString *)serverName
-                        path:(NSString *)path {
+                        path:(NSString *)path
+                     timeout:(NSTimeInterval)timeout {
   if (!path || !host) {
     [NSException raise:NSInvalidArgumentException
                 format:@"path and host cannot be nil."];
@@ -255,7 +256,10 @@
     // queue. Currently we use a singleton queue.
     _queue = [GRPCCompletionQueue completionQueue];
 
-    _call = [[GRPCHost hostWithAddress:host] unmanagedCallWithPath:path serverName:serverName completionQueue:_queue];
+    _call = [[GRPCHost hostWithAddress:host] unmanagedCallWithPath:path
+                                                        serverName:serverName
+                                                           timeout:timeout
+                                                   completionQueue:_queue];
     if (_call == NULL) {
       return nil;
     }
diff --git a/src/objective-c/tests/GRPCClientTests.m b/src/objective-c/tests/GRPCClientTests.m
index 9afe507121..82ac2600fa 100644
--- a/src/objective-c/tests/GRPCClientTests.m
+++ b/src/objective-c/tests/GRPCClientTests.m
@@ -28,6 +28,7 @@
 #import <RemoteTest/Messages.pbobjc.h>
 #import <RxLibrary/GRXWriteable.h>
 #import <RxLibrary/GRXWriter+Immediate.h>
+#import <RxLibrary/GRXBufferedPipe.h>
 
 #define TEST_TIMEOUT 16
 
@@ -39,6 +40,7 @@ static NSString * const kRemoteSSLHost = @"grpc-test.sandbox.googleapis.com";
 static GRPCProtoMethod *kInexistentMethod;
 static GRPCProtoMethod *kEmptyCallMethod;
 static GRPCProtoMethod *kUnaryCallMethod;
+static GRPCProtoMethod *kFullDuplexCallMethod;
 
 /** Observer class for testing that responseMetadata is KVO-compliant */
 @interface PassthroughObserver : NSObject
@@ -106,6 +108,9 @@ static GRPCProtoMethod *kUnaryCallMethod;
   kUnaryCallMethod = [[GRPCProtoMethod alloc] initWithPackage:kPackage
                                                       service:kService
                                                        method:@"UnaryCall"];
+  kFullDuplexCallMethod = [[GRPCProtoMethod alloc] initWithPackage:kPackage
+                                                           service:kService
+                                                            method:@"FullDuplexCall"];
 }
 
 - (void)testConnectionToRemoteServer {
@@ -422,4 +427,26 @@ static GRPCProtoMethod *kUnaryCallMethod;
   [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
+- (void)testTimeout {
+  __weak XCTestExpectation *completion = [self expectationWithDescription:@"RPC completed."];
+
+  GRXBufferedPipe *pipe = [GRXBufferedPipe pipe];
+  GRPCCall *call = [[GRPCCall alloc] initWithHost:kHostAddress
+                                             path:kFullDuplexCallMethod.HTTPPath
+                                   requestsWriter:pipe];
+
+  id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) {
+    XCTAssert(0, @"Failure: response received; Expect: no response received.");
+  } completionHandler:^(NSError *errorOrNil) {
+    XCTAssertNotNil(errorOrNil, @"Failure: no error received; Expect: receive deadline exceeded.");
+    XCTAssertEqual(errorOrNil.code, GRPCErrorCodeDeadlineExceeded);
+    [completion fulfill];
+  }];
+
+  call.timeout = 0.001;
+  [call startWithWriteable:responsesWriteable];
+
+  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
+}
+
 @end
diff --git a/src/objective-c/tests/run_tests.sh b/src/objective-c/tests/run_tests.sh
index 5b7a2d104a..608ae6884b 100755
--- a/src/objective-c/tests/run_tests.sh
+++ b/src/objective-c/tests/run_tests.sh
@@ -49,7 +49,8 @@ xcodebuild \
     HOST_PORT_REMOTE=grpc-test.sandbox.googleapis.com \
     test \
     | egrep -v "$XCODEBUILD_FILTER" \
-    | egrep -v '^$' -
+    | egrep -v '^$' \
+    | egrep -v "(GPBDictionary|GPBArray)" -
 
 echo "TIME:  $(date)"
 xcodebuild \
@@ -57,7 +58,8 @@ xcodebuild \
     -scheme CoreCronetEnd2EndTests \
     -destination name="iPhone 6" \
     test \
-    | egrep "$XCODEBUILD_FILTER" \
+    | egrep -v "$XCODEBUILD_FILTER" \
+    | egrep -v '^$' \
     | egrep -v "(GPBDictionary|GPBArray)" -
 
 echo "TIME:  $(date)"
@@ -65,7 +67,10 @@ xcodebuild \
     -workspace Tests.xcworkspace \
     -scheme CronetUnitTests \
     -destination name="iPhone 6" \
-    test | xcpretty
+    test \
+    | egrep -v "$XCODEBUILD_FILTER" \
+    | egrep -v '^$' \
+    | egrep -v "(GPBDictionary|GPBArray)" -
 
 echo "TIME:  $(date)"
 xcodebuild \
@@ -74,5 +79,6 @@ xcodebuild \
     -destination name="iPhone 6" \
     HOST_PORT_REMOTE=grpc-test.sandbox.googleapis.com \
     test \
-    | egrep "$XCODEBUILD_FILTER" \
+    | egrep -v "$XCODEBUILD_FILTER" \
+    | egrep -v '^$' \
     | egrep -v "(GPBDictionary|GPBArray)" -
diff --git a/src/php/tests/qps/composer.json b/src/php/tests/qps/composer.json
index 8c1e7b6c74..f8512648c4 100644
--- a/src/php/tests/qps/composer.json
+++ b/src/php/tests/qps/composer.json
@@ -1,8 +1,7 @@
 {
-  "minimum-stability": "dev",
   "require": {
     "grpc/grpc": "dev-master",
-    "google/protobuf": "^v3.3.0"
+    "google/protobuf": "v3.4.1"
   },
   "autoload": {
     "psr-4": {
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 28c30e5d35..237f430799 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pyx.pxi
@@ -41,9 +41,8 @@ cdef class CompletionQueue:
     cdef object user_tag = None
     cdef Call operation_call = None
     cdef CallDetails request_call_details = None
-    cdef Metadata request_metadata = None
+    cdef object request_metadata = None
     cdef Operations batch_operations = None
-    cdef Operation batch_operation = None
     if event.type == GRPC_QUEUE_TIMEOUT:
       return Event(
           event.type, False, None, None, None, None, False, None)
@@ -63,14 +62,8 @@ cdef class CompletionQueue:
         operation_call = tag.operation_call
         request_call_details = tag.request_call_details
         if tag.request_metadata is not None:
-          request_metadata = tag.request_metadata
-          request_metadata._claim_slice_ownership()
+          request_metadata = tuple(tag.request_metadata)
         batch_operations = tag.batch_operations
-        if tag.batch_operations is not None:
-          for op in batch_operations.operations:
-            batch_operation = <Operation>op
-            if batch_operation._received_metadata is not None:
-              batch_operation._received_metadata._claim_slice_ownership()
         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 98d7a9820d..57816f1cab 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
@@ -76,7 +76,7 @@ cdef class CredentialsMetadataPlugin:
     """
     Args:
       plugin_callback (callable): Callback accepting a service URL (str/bytes)
-        and callback object (accepting a Metadata,
+        and callback object (accepting a MetadataArray,
         grpc_status_code, and a str/bytes error message). This argument
         when called should be non-blocking and eventually call the callback
         object with the appropriate status code/details and metadata (if
@@ -129,8 +129,7 @@ cdef void plugin_get_metadata(
   def python_callback(
       Metadata metadata, grpc_status_code status,
       bytes error_details):
-    cb(user_data, metadata.c_metadata_array.metadata,
-       metadata.c_metadata_array.count, status, error_details)
+    cb(user_data, metadata.c_metadata, metadata.c_count, status, error_details)
     called_flag[0] = True
   cdef CredentialsMetadataPlugin self = <CredentialsMetadataPlugin>state
   cdef AuthMetadataContext cy_context = AuthMetadataContext()
@@ -139,8 +138,8 @@ cdef void plugin_get_metadata(
     self.plugin_callback(cy_context, python_callback)
   except Exception as error:
     if not called_flag[0]:
-      cb(user_data, Metadata([]).c_metadata_array.metadata,
-         0, StatusCode.unknown, traceback.format_exc().encode())
+      cb(user_data, NULL, 0, StatusCode.unknown,
+         traceback.format_exc().encode())
 
 cdef void plugin_destroy_c_plugin_state(void *state) with gil:
   cpython.Py_DECREF(<CredentialsMetadataPlugin>state)
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
index 5950bfa0e6..840af5c43a 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
@@ -59,6 +59,7 @@ cdef extern from "grpc/grpc.h":
   grpc_slice grpc_slice_malloc(size_t length) nogil
   grpc_slice grpc_slice_from_copied_string(const char *source) nogil
   grpc_slice grpc_slice_from_copied_buffer(const char *source, size_t len) nogil
+  grpc_slice grpc_slice_copy(grpc_slice s) nogil
 
   # Declare functions for function-like macros (because Cython)...
   void *grpc_slice_start_ptr "GRPC_SLICE_START_PTR" (grpc_slice s) nogil
@@ -522,7 +523,7 @@ cdef extern from "grpc/compression.h":
   int grpc_compression_algorithm_parse(
       grpc_slice value, grpc_compression_algorithm *algorithm) nogil
   int grpc_compression_algorithm_name(grpc_compression_algorithm algorithm,
-                                      char **name) nogil
+                                      const char **name) nogil
   grpc_compression_algorithm grpc_compression_algorithm_for_level(
       grpc_compression_level level, uint32_t accepted_encodings) nogil
   void grpc_compression_options_init(grpc_compression_options *opts) nogil
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/records.pxd.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/records.pxd.pxi
index 8ace6aeb52..9c40ebf0c2 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/records.pxd.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/records.pxd.pxi
@@ -37,7 +37,7 @@ cdef class OperationTag:
   cdef Server shutting_down_server
   cdef Call operation_call
   cdef CallDetails request_call_details
-  cdef Metadata request_metadata
+  cdef MetadataArray request_metadata
   cdef Operations batch_operations
   cdef bint is_new_request
 
@@ -51,7 +51,7 @@ cdef class Event:
   # For Server.request_call
   cdef readonly bint is_new_request
   cdef readonly CallDetails request_call_details
-  cdef readonly Metadata request_metadata
+  cdef readonly object request_metadata
 
   # For server calls
   cdef readonly Call operation_call
@@ -92,15 +92,20 @@ cdef class Metadatum:
 
 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 void _claim_slice_ownership(self)
 
 
 cdef class Operation:
 
   cdef grpc_op c_op
   cdef ByteBuffer _received_message
-  cdef Metadata _received_metadata
+  cdef MetadataArray _received_metadata
   cdef grpc_status_code _received_status_code
   cdef grpc_slice _status_details
   cdef int _received_cancelled
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
index 1b2ddd2469..d860173b5d 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
@@ -238,7 +238,7 @@ cdef class Event:
   def __cinit__(self, grpc_completion_type type, bint success,
                 object tag, Call operation_call,
                 CallDetails request_call_details,
-                Metadata request_metadata,
+                object request_metadata,
                 bint is_new_request,
                 Operations batch_operations):
     self.type = type
@@ -437,48 +437,79 @@ cdef class Metadatum:
 cdef class _MetadataIterator:
 
   cdef size_t i
-  cdef Metadata metadata
+  cdef size_t _length
+  cdef object _metadatum_indexable
 
-  def __cinit__(self, Metadata metadata not None):
+  def __cinit__(self, length, metadatum_indexable):
+    self._length = length
+    self._metadatum_indexable = metadatum_indexable
     self.i = 0
-    self.metadata = metadata
 
   def __iter__(self):
     return self
 
   def __next__(self):
-    if self.i < len(self.metadata):
-      result = self.metadata[self.i]
+    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()
-      grpc_metadata_array_init(&self.c_metadata_array)
-    metadata = list(metadata_iterable)
-    for metadatum in metadata:
-      if not isinstance(metadatum, Metadatum):
-        raise TypeError("expected list of Metadatum")
-    self.c_metadata_array.count = len(metadata)
-    self.c_metadata_array.capacity = len(metadata)
+      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:
-      self.c_metadata_array.metadata = <grpc_metadata *>gpr_malloc(
-          self.c_metadata_array.count*sizeof(grpc_metadata)
-      )
-    for i in range(self.c_metadata_array.count):
-      (<Metadatum>metadata[i])._copy_metadatum(&self.c_metadata_array.metadata[i])
+      grpc_init()
+      grpc_metadata_array_init(&self.c_metadata_array)
 
   def __dealloc__(self):
     with nogil:
-      # this frees the allocated memory for the grpc_metadata_array (although
-      # it'd be nice if that were documented somewhere...)
-      # TODO(atash): document this in the C core
       grpc_metadata_array_destroy(&self.c_metadata_array)
       grpc_shutdown()
 
@@ -493,21 +524,7 @@ cdef class Metadata:
     return Metadatum(key=key, value=value)
 
   def __iter__(self):
-    return _MetadataIterator(self)
-
-  cdef void _claim_slice_ownership(self):
-    cdef grpc_metadata_array new_c_metadata_array
-    grpc_metadata_array_init(&new_c_metadata_array)
-    new_c_metadata_array.metadata = <grpc_metadata *>gpr_malloc(
-        self.c_metadata_array.count*sizeof(grpc_metadata))
-    new_c_metadata_array.count = self.c_metadata_array.count
-    for i in range(self.c_metadata_array.count):
-      new_c_metadata_array.metadata[i].key = _copy_slice(
-          self.c_metadata_array.metadata[i].key)
-      new_c_metadata_array.metadata[i].value = _copy_slice(
-          self.c_metadata_array.metadata[i].value)
-    grpc_metadata_array_destroy(&self.c_metadata_array)
-    self.c_metadata_array = new_c_metadata_array
+    return _MetadataIterator(self.c_metadata_array.count, self)
 
 
 cdef class Operation:
@@ -547,14 +564,13 @@ 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")
-    return self._received_metadata
-
-  @property
-  def received_metadata_or_none(self):
-    if (self.c_op.type != GRPC_OP_RECV_INITIAL_METADATA and
-        self.c_op.type != GRPC_OP_RECV_STATUS_ON_CLIENT):
-      return None
-    return self._received_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)
 
   @property
   def received_status_code(self):
@@ -601,9 +617,8 @@ def operation_send_initial_metadata(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_metadata_array.count
-  op.c_op.data.send_initial_metadata.metadata = (
-      metadata.c_metadata_array.metadata)
+  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)
   op.is_valid = True
   return op
@@ -631,9 +646,8 @@ def operation_send_status_from_server(
   op.c_op.type = GRPC_OP_SEND_STATUS_FROM_SERVER
   op.c_op.flags = flags
   op.c_op.data.send_status_from_server.trailing_metadata_count = (
-      metadata.c_metadata_array.count)
-  op.c_op.data.send_status_from_server.trailing_metadata = (
-      metadata.c_metadata_array.metadata)
+      metadata.c_count)
+  op.c_op.data.send_status_from_server.trailing_metadata = metadata.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)
@@ -646,7 +660,7 @@ 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 = Metadata([])
+  op._received_metadata = MetadataArray()
   op.c_op.data.receive_initial_metadata.receive_initial_metadata = (
       &op._received_metadata.c_metadata_array)
   op.is_valid = True
@@ -669,7 +683,7 @@ 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 = Metadata([])
+  op._received_metadata = MetadataArray()
   op.c_op.data.receive_status_on_client.trailing_metadata = (
       &op._received_metadata.c_metadata_array)
   op.c_op.data.receive_status_on_client.status = (
@@ -768,7 +782,7 @@ cdef class CompressionOptions:
 
 
 def compression_algorithm_name(grpc_compression_algorithm algorithm):
-  cdef char* name
+  cdef const char* name
   with nogil:
     grpc_compression_algorithm_name(algorithm, &name)
   # Let Cython do the right thing with string casting
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
index dd276fd57b..b8db27469f 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
@@ -44,7 +44,7 @@ cdef class Server:
     cdef OperationTag operation_tag = OperationTag(tag)
     operation_tag.operation_call = Call()
     operation_tag.request_call_details = CallDetails()
-    operation_tag.request_metadata = Metadata([])
+    operation_tag.request_metadata = MetadataArray()
     operation_tag.references.extend([self, call_queue, server_queue])
     operation_tag.is_new_request = True
     operation_tag.batch_operations = Operations([])
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 218d569f9f..62723d047e 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -73,6 +73,8 @@ CORE_SOURCE_FILES = [
   'src/core/lib/compression/compression_internal.c',
   'src/core/lib/compression/message_compress.c',
   'src/core/lib/compression/stream_compression.c',
+  'src/core/lib/compression/stream_compression_gzip.c',
+  'src/core/lib/compression/stream_compression_identity.c',
   'src/core/lib/debug/stats.c',
   'src/core/lib/debug/stats_data.c',
   'src/core/lib/http/format_request.c',
diff --git a/src/python/grpcio_health_checking/setup.py b/src/python/grpcio_health_checking/setup.py
index 0299b4cca9..1f5e9c5130 100644
--- a/src/python/grpcio_health_checking/setup.py
+++ b/src/python/grpcio_health_checking/setup.py
@@ -34,7 +34,7 @@ CLASSIFIERS = [
     'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: 3.6',
     'License :: OSI Approved :: Apache Software License',
-],
+]
 
 PACKAGE_DIRECTORIES = {
     '': '.',
diff --git a/src/python/grpcio_reflection/setup.py b/src/python/grpcio_reflection/setup.py
index bed2311b59..9360550afb 100644
--- a/src/python/grpcio_reflection/setup.py
+++ b/src/python/grpcio_reflection/setup.py
@@ -35,7 +35,7 @@ CLASSIFIERS = [
     'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: 3.6',
     'License :: OSI Approved :: Apache Software License',
-],
+]
 
 PACKAGE_DIRECTORIES = {
     '': '.',
diff --git a/src/python/grpcio_testing/grpc_testing/__init__.py b/src/python/grpcio_testing/grpc_testing/__init__.py
index 917e11808e..994274500c 100644
--- a/src/python/grpcio_testing/grpc_testing/__init__.py
+++ b/src/python/grpcio_testing/grpc_testing/__init__.py
@@ -213,7 +213,7 @@ class StreamStreamChannelRpc(six.with_metaclass(abc.ABCMeta)):
         raise NotImplementedError()
 
 
-class Channel(six.with_metaclass(abc.ABCMeta), grpc.Channel):
+class Channel(six.with_metaclass(abc.ABCMeta, grpc.Channel)):
     """A grpc.Channel double with which to test a system that invokes RPCs."""
 
     @abc.abstractmethod
diff --git a/src/python/grpcio_testing/grpc_version.py b/src/python/grpcio_testing/grpc_version.py
index 41a75d46f6..592d08efc3 100644
--- a/src/python/grpcio_testing/grpc_version.py
+++ b/src/python/grpcio_testing/grpc_version.py
@@ -12,6 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_reflection/grpc_version.py.template`!!!
+# AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_testing/grpc_version.py.template`!!!
 
-VERSION = '1.5.0.dev0'
+VERSION='1.7.0.dev0'
diff --git a/src/python/grpcio_tests/commands.py b/src/python/grpcio_tests/commands.py
index 162200112a..93f84572b7 100644
--- a/src/python/grpcio_tests/commands.py
+++ b/src/python/grpcio_tests/commands.py
@@ -67,55 +67,6 @@ class GatherProto(setuptools.Command):
             open(path, 'a').close()
 
 
-class BuildProtoModules(setuptools.Command):
-    """Command to generate project *_pb2.py modules from proto files."""
-
-    description = 'build protobuf modules'
-    user_options = [
-        ('include=', None, 'path patterns to include in protobuf generation'),
-        ('exclude=', None, 'path patterns to exclude from protobuf generation')
-    ]
-
-    def initialize_options(self):
-        self.exclude = None
-        self.include = r'.*\.proto$'
-
-    def finalize_options(self):
-        pass
-
-    def run(self):
-        import grpc_tools.protoc as protoc
-
-        include_regex = re.compile(self.include)
-        exclude_regex = re.compile(self.exclude) if self.exclude else None
-        paths = []
-        for walk_root, directories, filenames in os.walk(PROTO_STEM):
-            for filename in filenames:
-                path = os.path.join(walk_root, filename)
-                if include_regex.match(path) and not (
-                        exclude_regex and exclude_regex.match(path)):
-                    paths.append(path)
-
-        # TODO(kpayson): It would be nice to do this in a batch command,
-        # but we currently have name conflicts in src/proto
-        for path in paths:
-            command = [
-                'grpc_tools.protoc',
-                '-I {}'.format(PROTO_STEM),
-                '--python_out={}'.format(PROTO_STEM),
-                '--grpc_python_out={}'.format(PROTO_STEM),
-            ] + [path]
-            if protoc.main(command) != 0:
-                sys.stderr.write(
-                    'warning: Command:\n{}\nFailed'.format(command))
-
-        # Generated proto directories dont include __init__.py, but
-        # these are needed for python package resolution
-        for walk_root, _, _ in os.walk(PROTO_STEM):
-            path = os.path.join(walk_root, '__init__.py')
-            open(path, 'a').close()
-
-
 class BuildPy(build_py.build_py):
     """Custom project build command."""
 
diff --git a/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_messages/__init__.py b/src/python/grpcio_tests/tests/_sanity/__init__.py
index 5772620b60..5772620b60 100644
--- a/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_messages/__init__.py
+++ b/src/python/grpcio_tests/tests/_sanity/__init__.py
diff --git a/src/python/grpcio_tests/tests/unit/_sanity/_sanity_test.py b/src/python/grpcio_tests/tests/_sanity/_sanity_test.py
index 19bc8801eb..b4079850ff 100644
--- a/src/python/grpcio_tests/tests/unit/_sanity/_sanity_test.py
+++ b/src/python/grpcio_tests/tests/_sanity/_sanity_test.py
@@ -21,24 +21,25 @@ import six
 import tests
 
 
-class Sanity(unittest.TestCase):
+class SanityTest(unittest.TestCase):
+
+    maxDiff = 32768
 
     def testTestsJsonUpToDate(self):
         """Autodiscovers all test suites and checks that tests.json is up to date"""
         loader = tests.Loader()
         loader.loadTestsFromNames(['tests'])
-        test_suite_names = [
+        test_suite_names = sorted({
             test_case_class.id().rsplit('.', 1)[0]
             for test_case_class in tests._loader.iterate_suite_cases(
                 loader.suite)
-        ]
-        test_suite_names = sorted(set(test_suite_names))
+        })
 
         tests_json_string = pkg_resources.resource_string('tests', 'tests.json')
-        if six.PY3:
-            tests_json_string = tests_json_string.decode()
-        tests_json = json.loads(tests_json_string)
-        self.assertListEqual(test_suite_names, tests_json)
+        tests_json = json.loads(tests_json_string.decode()
+                                if six.PY3 else tests_json_string)
+
+        self.assertSequenceEqual(tests_json, test_suite_names)
 
 
 if __name__ == '__main__':
diff --git a/src/python/grpcio_tests/tests/http2/negative_http2_client.py b/src/python/grpcio_tests/tests/http2/negative_http2_client.py
index 6d8a6bce77..8dab5b67f1 100644
--- a/src/python/grpcio_tests/tests/http2/negative_http2_client.py
+++ b/src/python/grpcio_tests/tests/http2/negative_http2_client.py
@@ -17,7 +17,7 @@ import argparse
 
 import grpc
 import time
-from src.proto.grpc.testing import test_pb2
+from src.proto.grpc.testing import test_pb2_grpc
 from src.proto.grpc.testing import messages_pb2
 
 
@@ -147,7 +147,7 @@ def _stub(server_host, server_port):
     target = '{}:{}'.format(server_host, server_port)
     channel = grpc.insecure_channel(target)
     grpc.channel_ready_future(channel).result()
-    return test_pb2.TestServiceStub(channel)
+    return test_pb2_grpc.TestServiceStub(channel)
 
 
 def main():
diff --git a/src/python/grpcio_tests/tests/interop/client.py b/src/python/grpcio_tests/tests/interop/client.py
index 47ae96472d..e520c08290 100644
--- a/src/python/grpcio_tests/tests/interop/client.py
+++ b/src/python/grpcio_tests/tests/interop/client.py
@@ -19,7 +19,7 @@ import os
 from google import auth as google_auth
 from google.auth import jwt as google_auth_jwt
 import grpc
-from src.proto.grpc.testing import test_pb2
+from src.proto.grpc.testing import test_pb2_grpc
 
 from tests.interop import methods
 from tests.interop import resources
@@ -106,9 +106,9 @@ def _stub(args):
     else:
         channel = grpc.insecure_channel(target)
     if args.test_case == "unimplemented_service":
-        return test_pb2.UnimplementedServiceStub(channel)
+        return test_pb2_grpc.UnimplementedServiceStub(channel)
     else:
-        return test_pb2.TestServiceStub(channel)
+        return test_pb2_grpc.TestServiceStub(channel)
 
 
 def _test_case_from_arg(test_case_arg):
diff --git a/src/python/grpcio_tests/tests/protoc_plugin/_python_plugin_test.py b/src/python/grpcio_tests/tests/protoc_plugin/_python_plugin_test.py
index 71493bfec6..5b84001aab 100644
--- a/src/python/grpcio_tests/tests/protoc_plugin/_python_plugin_test.py
+++ b/src/python/grpcio_tests/tests/protoc_plugin/_python_plugin_test.py
@@ -33,7 +33,7 @@ from tests.unit.framework.common import test_constants
 import tests.protoc_plugin.protos.payload.test_payload_pb2 as payload_pb2
 import tests.protoc_plugin.protos.requests.r.test_requests_pb2 as request_pb2
 import tests.protoc_plugin.protos.responses.test_responses_pb2 as response_pb2
-import tests.protoc_plugin.protos.service.test_service_pb2 as service_pb2
+import tests.protoc_plugin.protos.service.test_service_pb2_grpc as service_pb2_grpc
 
 # Identifiers of entities we expect to find in the generated module.
 STUB_IDENTIFIER = 'TestServiceStub'
@@ -138,7 +138,7 @@ def _CreateService():
   """
     servicer_methods = _ServicerMethods()
 
-    class Servicer(getattr(service_pb2, SERVICER_IDENTIFIER)):
+    class Servicer(getattr(service_pb2_grpc, SERVICER_IDENTIFIER)):
 
         def UnaryCall(self, request, context):
             return servicer_methods.UnaryCall(request, context)
@@ -157,11 +157,12 @@ def _CreateService():
 
     server = grpc.server(
         futures.ThreadPoolExecutor(max_workers=test_constants.POOL_SIZE))
-    getattr(service_pb2, ADD_SERVICER_TO_SERVER_IDENTIFIER)(Servicer(), server)
+    getattr(service_pb2_grpc, ADD_SERVICER_TO_SERVER_IDENTIFIER)(Servicer(),
+                                                                 server)
     port = server.add_insecure_port('[::]:0')
     server.start()
     channel = grpc.insecure_channel('localhost:{}'.format(port))
-    stub = getattr(service_pb2, STUB_IDENTIFIER)(channel)
+    stub = getattr(service_pb2_grpc, STUB_IDENTIFIER)(channel)
     return _Service(servicer_methods, server, stub)
 
 
@@ -173,16 +174,17 @@ def _CreateIncompleteService():
       servicer_methods implements none of the methods required of it.
   """
 
-    class Servicer(getattr(service_pb2, SERVICER_IDENTIFIER)):
+    class Servicer(getattr(service_pb2_grpc, SERVICER_IDENTIFIER)):
         pass
 
     server = grpc.server(
         futures.ThreadPoolExecutor(max_workers=test_constants.POOL_SIZE))
-    getattr(service_pb2, ADD_SERVICER_TO_SERVER_IDENTIFIER)(Servicer(), server)
+    getattr(service_pb2_grpc, ADD_SERVICER_TO_SERVER_IDENTIFIER)(Servicer(),
+                                                                 server)
     port = server.add_insecure_port('[::]:0')
     server.start()
     channel = grpc.insecure_channel('localhost:{}'.format(port))
-    stub = getattr(service_pb2, STUB_IDENTIFIER)(channel)
+    stub = getattr(service_pb2_grpc, STUB_IDENTIFIER)(channel)
     return _Service(None, server, stub)
 
 
@@ -223,10 +225,11 @@ class PythonPluginTest(unittest.TestCase):
 
     def testImportAttributes(self):
         # check that we can access the generated module and its members.
-        self.assertIsNotNone(getattr(service_pb2, STUB_IDENTIFIER, None))
-        self.assertIsNotNone(getattr(service_pb2, SERVICER_IDENTIFIER, None))
+        self.assertIsNotNone(getattr(service_pb2_grpc, STUB_IDENTIFIER, None))
         self.assertIsNotNone(
-            getattr(service_pb2, ADD_SERVICER_TO_SERVER_IDENTIFIER, None))
+            getattr(service_pb2_grpc, SERVICER_IDENTIFIER, None))
+        self.assertIsNotNone(
+            getattr(service_pb2_grpc, ADD_SERVICER_TO_SERVER_IDENTIFIER, None))
 
     def testUpDown(self):
         service = _CreateService()
diff --git a/src/python/grpcio_tests/tests/protoc_plugin/_split_definitions_test.py b/src/python/grpcio_tests/tests/protoc_plugin/_split_definitions_test.py
index 1aeb62a7c5..7868cdbfb3 100644
--- a/src/python/grpcio_tests/tests/protoc_plugin/_split_definitions_test.py
+++ b/src/python/grpcio_tests/tests/protoc_plugin/_split_definitions_test.py
@@ -12,22 +12,20 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import collections
+import abc
 from concurrent import futures
 import contextlib
-import distutils.spawn
-import errno
 import importlib
 import os
-import os.path
+from os import path
 import pkgutil
+import platform
 import shutil
-import subprocess
 import sys
 import tempfile
-import threading
 import unittest
-import platform
+
+import six
 
 import grpc
 from grpc_tools import protoc
@@ -37,292 +35,285 @@ _MESSAGES_IMPORT = b'import "messages.proto";'
 _SPLIT_NAMESPACE = b'package grpc_protoc_plugin.invocation_testing.split;'
 _COMMON_NAMESPACE = b'package grpc_protoc_plugin.invocation_testing;'
 
+_RELATIVE_PROTO_PATH = 'relative_proto_path'
+_RELATIVE_PYTHON_OUT = 'relative_python_out'
+
 
 @contextlib.contextmanager
-def _system_path(path):
+def _system_path(path_insertion):
     old_system_path = sys.path[:]
-    sys.path = sys.path[0:1] + path + sys.path[1:]
+    sys.path = sys.path[0:1] + path_insertion + sys.path[1:]
     yield
     sys.path = old_system_path
 
 
-class DummySplitServicer(object):
+# NOTE(nathaniel): https://twitter.com/exoplaneteer/status/677259364256747520
+# Life lesson "just always default to idempotence" reinforced.
+def _create_directory_tree(root, path_components_sequence):
+    created = set()
+    for path_components in path_components_sequence:
+        thus_far = ''
+        for path_component in path_components:
+            relative_path = path.join(thus_far, path_component)
+            if relative_path not in created:
+                os.makedirs(path.join(root, relative_path))
+                created.add(relative_path)
+            thus_far = path.join(thus_far, path_component)
+
+
+def _massage_proto_content(proto_content, test_name_bytes,
+                           messages_proto_relative_file_name_bytes):
+    package_substitution = (b'package grpc_protoc_plugin.invocation_testing.' +
+                            test_name_bytes + b';')
+    common_namespace_substituted = proto_content.replace(_COMMON_NAMESPACE,
+                                                         package_substitution)
+    split_namespace_substituted = common_namespace_substituted.replace(
+        _SPLIT_NAMESPACE, package_substitution)
+    message_import_replaced = split_namespace_substituted.replace(
+        _MESSAGES_IMPORT,
+        b'import "' + messages_proto_relative_file_name_bytes + b'";')
+    return message_import_replaced
+
+
+def _packagify(directory):
+    for subdirectory, _, _ in os.walk(directory):
+        init_file_name = path.join(subdirectory, '__init__.py')
+        with open(init_file_name, 'wb') as init_file:
+            init_file.write(b'')
 
-    def __init__(self, request_class, response_class):
-        self.request_class = request_class
-        self.response_class = response_class
+
+class _Servicer(object):
+
+    def __init__(self, response_class):
+        self._response_class = response_class
 
     def Call(self, request, context):
-        return self.response_class()
+        return self._response_class()
 
 
-class SeparateTestMixin(object):
+def _protoc(proto_path, python_out, grpc_python_out_flag, grpc_python_out,
+            absolute_proto_file_names):
+    args = [
+        '',
+        '--proto_path={}'.format(proto_path),
+    ]
+    if python_out is not None:
+        args.append('--python_out={}'.format(python_out))
+    if grpc_python_out is not None:
+        args.append('--grpc_python_out={}:{}'.format(grpc_python_out_flag,
+                                                     grpc_python_out))
+    args.extend(absolute_proto_file_names)
+    return protoc.main(args)
 
-    def testImportAttributes(self):
-        with _system_path([self.python_out_directory]):
-            pb2 = importlib.import_module(self.pb2_import)
-        pb2.Request
-        pb2.Response
-        if self.should_find_services_in_pb2:
-            pb2.TestServiceServicer
-        else:
-            with self.assertRaises(AttributeError):
-                pb2.TestServiceServicer
-
-        with _system_path([self.grpc_python_out_directory]):
-            pb2_grpc = importlib.import_module(self.pb2_grpc_import)
-        pb2_grpc.TestServiceServicer
-        with self.assertRaises(AttributeError):
-            pb2_grpc.Request
-        with self.assertRaises(AttributeError):
-            pb2_grpc.Response
-
-    def testCall(self):
-        with _system_path([self.python_out_directory]):
-            pb2 = importlib.import_module(self.pb2_import)
-        with _system_path([self.grpc_python_out_directory]):
-            pb2_grpc = importlib.import_module(self.pb2_grpc_import)
-        server = grpc.server(
-            futures.ThreadPoolExecutor(max_workers=test_constants.POOL_SIZE))
-        pb2_grpc.add_TestServiceServicer_to_server(
-            DummySplitServicer(pb2.Request, pb2.Response), server)
-        port = server.add_insecure_port('[::]:0')
-        server.start()
-        channel = grpc.insecure_channel('localhost:{}'.format(port))
-        stub = pb2_grpc.TestServiceStub(channel)
-        request = pb2.Request()
-        expected_response = pb2.Response()
-        response = stub.Call(request)
-        self.assertEqual(expected_response, response)
-
-
-class CommonTestMixin(object):
-
-    def testImportAttributes(self):
-        with _system_path([self.python_out_directory]):
-            pb2 = importlib.import_module(self.pb2_import)
-        pb2.Request
-        pb2.Response
-        if self.should_find_services_in_pb2:
-            pb2.TestServiceServicer
-        else:
-            with self.assertRaises(AttributeError):
-                pb2.TestServiceServicer
-
-        with _system_path([self.grpc_python_out_directory]):
-            pb2_grpc = importlib.import_module(self.pb2_grpc_import)
-        pb2_grpc.TestServiceServicer
-        with self.assertRaises(AttributeError):
-            pb2_grpc.Request
-        with self.assertRaises(AttributeError):
-            pb2_grpc.Response
-
-    def testCall(self):
-        with _system_path([self.python_out_directory]):
-            pb2 = importlib.import_module(self.pb2_import)
-        with _system_path([self.grpc_python_out_directory]):
-            pb2_grpc = importlib.import_module(self.pb2_grpc_import)
-        server = grpc.server(
-            futures.ThreadPoolExecutor(max_workers=test_constants.POOL_SIZE))
-        pb2_grpc.add_TestServiceServicer_to_server(
-            DummySplitServicer(pb2.Request, pb2.Response), server)
-        port = server.add_insecure_port('[::]:0')
-        server.start()
-        channel = grpc.insecure_channel('localhost:{}'.format(port))
-        stub = pb2_grpc.TestServiceStub(channel)
-        request = pb2.Request()
-        expected_response = pb2.Response()
-        response = stub.Call(request)
-        self.assertEqual(expected_response, response)
-
-
-@unittest.skipIf(platform.python_implementation() == "PyPy",
-                 "Skip test if run with PyPy")
-class SameSeparateTest(unittest.TestCase, SeparateTestMixin):
 
-    def setUp(self):
-        same_proto_contents = pkgutil.get_data(
-            'tests.protoc_plugin.protos.invocation_testing', 'same.proto')
-        self.directory = tempfile.mkdtemp(suffix='same_separate', dir='.')
-        self.proto_directory = os.path.join(self.directory, 'proto_path')
-        self.python_out_directory = os.path.join(self.directory, 'python_out')
-        self.grpc_python_out_directory = os.path.join(self.directory,
-                                                      'grpc_python_out')
-        os.makedirs(self.proto_directory)
-        os.makedirs(self.python_out_directory)
-        os.makedirs(self.grpc_python_out_directory)
-        same_proto_file = os.path.join(self.proto_directory,
-                                       'same_separate.proto')
-        open(same_proto_file, 'wb').write(
-            same_proto_contents.replace(
-                _COMMON_NAMESPACE,
-                b'package grpc_protoc_plugin.invocation_testing.same_separate;'))
-        protoc_result = protoc.main([
-            '',
-            '--proto_path={}'.format(self.proto_directory),
-            '--python_out={}'.format(self.python_out_directory),
-            '--grpc_python_out=grpc_2_0:{}'.format(
-                self.grpc_python_out_directory),
-            same_proto_file,
-        ])
-        if protoc_result != 0:
-            raise Exception("unexpected protoc error")
-        open(os.path.join(self.grpc_python_out_directory, '__init__.py'),
-             'w').write('')
-        open(os.path.join(self.python_out_directory, '__init__.py'),
-             'w').write('')
-        self.pb2_import = 'same_separate_pb2'
-        self.pb2_grpc_import = 'same_separate_pb2_grpc'
-        self.should_find_services_in_pb2 = False
+class _Mid2016ProtocStyle(object):
 
-    def tearDown(self):
-        shutil.rmtree(self.directory)
+    def name(self):
+        return 'Mid2016ProtocStyle'
 
+    def grpc_in_pb2_expected(self):
+        return True
 
-@unittest.skipIf(platform.python_implementation() == "PyPy",
-                 "Skip test if run with PyPy")
-class SameCommonTest(unittest.TestCase, CommonTestMixin):
+    def protoc(self, proto_path, python_out, absolute_proto_file_names):
+        return (_protoc(proto_path, python_out, 'grpc_1_0', python_out,
+                        absolute_proto_file_names),)
 
-    def setUp(self):
-        same_proto_contents = pkgutil.get_data(
-            'tests.protoc_plugin.protos.invocation_testing', 'same.proto')
-        self.directory = tempfile.mkdtemp(suffix='same_common', dir='.')
-        self.proto_directory = os.path.join(self.directory, 'proto_path')
-        self.python_out_directory = os.path.join(self.directory, 'python_out')
-        self.grpc_python_out_directory = self.python_out_directory
-        os.makedirs(self.proto_directory)
-        os.makedirs(self.python_out_directory)
-        same_proto_file = os.path.join(self.proto_directory,
-                                       'same_common.proto')
-        open(same_proto_file, 'wb').write(
-            same_proto_contents.replace(
-                _COMMON_NAMESPACE,
-                b'package grpc_protoc_plugin.invocation_testing.same_common;'))
-
-        protoc_result = protoc.main([
-            '',
-            '--proto_path={}'.format(self.proto_directory),
-            '--python_out={}'.format(self.python_out_directory),
-            '--grpc_python_out={}'.format(self.grpc_python_out_directory),
-            same_proto_file,
-        ])
-        if protoc_result != 0:
-            raise Exception("unexpected protoc error")
-        open(os.path.join(self.python_out_directory, '__init__.py'),
-             'w').write('')
-        self.pb2_import = 'same_common_pb2'
-        self.pb2_grpc_import = 'same_common_pb2_grpc'
-        self.should_find_services_in_pb2 = True
 
-    def tearDown(self):
-        shutil.rmtree(self.directory)
+class _SingleProtocExecutionProtocStyle(object):
 
+    def name(self):
+        return 'SingleProtocExecutionProtocStyle'
 
-@unittest.skipIf(platform.python_implementation() == "PyPy",
-                 "Skip test if run with PyPy")
-class SplitCommonTest(unittest.TestCase, CommonTestMixin):
+    def grpc_in_pb2_expected(self):
+        return False
 
-    def setUp(self):
-        services_proto_contents = pkgutil.get_data(
-            'tests.protoc_plugin.protos.invocation_testing.split_services',
-            'services.proto')
-        messages_proto_contents = pkgutil.get_data(
-            'tests.protoc_plugin.protos.invocation_testing.split_messages',
-            'messages.proto')
-        self.directory = tempfile.mkdtemp(suffix='split_common', dir='.')
-        self.proto_directory = os.path.join(self.directory, 'proto_path')
-        self.python_out_directory = os.path.join(self.directory, 'python_out')
-        self.grpc_python_out_directory = self.python_out_directory
-        os.makedirs(self.proto_directory)
-        os.makedirs(self.python_out_directory)
-        services_proto_file = os.path.join(self.proto_directory,
-                                           'split_common_services.proto')
-        messages_proto_file = os.path.join(self.proto_directory,
-                                           'split_common_messages.proto')
-        open(services_proto_file, 'wb').write(
-            services_proto_contents.replace(
-                _MESSAGES_IMPORT, b'import "split_common_messages.proto";')
-            .replace(
-                _SPLIT_NAMESPACE,
-                b'package grpc_protoc_plugin.invocation_testing.split_common;'))
-        open(messages_proto_file, 'wb').write(
-            messages_proto_contents.replace(
-                _SPLIT_NAMESPACE,
-                b'package grpc_protoc_plugin.invocation_testing.split_common;'))
-        protoc_result = protoc.main([
-            '',
-            '--proto_path={}'.format(self.proto_directory),
-            '--python_out={}'.format(self.python_out_directory),
-            '--grpc_python_out={}'.format(self.grpc_python_out_directory),
-            services_proto_file,
-            messages_proto_file,
-        ])
-        if protoc_result != 0:
-            raise Exception("unexpected protoc error")
-        open(os.path.join(self.python_out_directory, '__init__.py'),
-             'w').write('')
-        self.pb2_import = 'split_common_messages_pb2'
-        self.pb2_grpc_import = 'split_common_services_pb2_grpc'
-        self.should_find_services_in_pb2 = False
+    def protoc(self, proto_path, python_out, absolute_proto_file_names):
+        return (_protoc(proto_path, python_out, 'grpc_2_0', python_out,
+                        absolute_proto_file_names),)
+
+
+class _ProtoBeforeGrpcProtocStyle(object):
+
+    def name(self):
+        return 'ProtoBeforeGrpcProtocStyle'
+
+    def grpc_in_pb2_expected(self):
+        return False
+
+    def protoc(self, proto_path, python_out, absolute_proto_file_names):
+        pb2_protoc_exit_code = _protoc(proto_path, python_out, None, None,
+                                       absolute_proto_file_names)
+        pb2_grpc_protoc_exit_code = _protoc(
+            proto_path, None, 'grpc_2_0', python_out, absolute_proto_file_names)
+        return pb2_protoc_exit_code, pb2_grpc_protoc_exit_code,
 
-    def tearDown(self):
-        shutil.rmtree(self.directory)
 
+class _GrpcBeforeProtoProtocStyle(object):
 
-@unittest.skipIf(platform.python_implementation() == "PyPy",
-                 "Skip test if run with PyPy")
-class SplitSeparateTest(unittest.TestCase, SeparateTestMixin):
+    def name(self):
+        return 'GrpcBeforeProtoProtocStyle'
+
+    def grpc_in_pb2_expected(self):
+        return False
+
+    def protoc(self, proto_path, python_out, absolute_proto_file_names):
+        pb2_grpc_protoc_exit_code = _protoc(
+            proto_path, None, 'grpc_2_0', python_out, absolute_proto_file_names)
+        pb2_protoc_exit_code = _protoc(proto_path, python_out, None, None,
+                                       absolute_proto_file_names)
+        return pb2_grpc_protoc_exit_code, pb2_protoc_exit_code,
+
+
+_PROTOC_STYLES = (_Mid2016ProtocStyle(), _SingleProtocExecutionProtocStyle(),
+                  _ProtoBeforeGrpcProtocStyle(), _GrpcBeforeProtoProtocStyle(),)
+
+
+@unittest.skipIf(platform.python_implementation() == 'PyPy',
+                 'Skip test if run with PyPy!')
+class _Test(six.with_metaclass(abc.ABCMeta, unittest.TestCase)):
 
     def setUp(self):
-        services_proto_contents = pkgutil.get_data(
-            'tests.protoc_plugin.protos.invocation_testing.split_services',
-            'services.proto')
-        messages_proto_contents = pkgutil.get_data(
-            'tests.protoc_plugin.protos.invocation_testing.split_messages',
-            'messages.proto')
-        self.directory = tempfile.mkdtemp(suffix='split_separate', dir='.')
-        self.proto_directory = os.path.join(self.directory, 'proto_path')
-        self.python_out_directory = os.path.join(self.directory, 'python_out')
-        self.grpc_python_out_directory = os.path.join(self.directory,
-                                                      'grpc_python_out')
-        os.makedirs(self.proto_directory)
-        os.makedirs(self.python_out_directory)
-        os.makedirs(self.grpc_python_out_directory)
-        services_proto_file = os.path.join(self.proto_directory,
-                                           'split_separate_services.proto')
-        messages_proto_file = os.path.join(self.proto_directory,
-                                           'split_separate_messages.proto')
-        open(services_proto_file, 'wb').write(
-            services_proto_contents.replace(
-                _MESSAGES_IMPORT, b'import "split_separate_messages.proto";')
-            .replace(
-                _SPLIT_NAMESPACE,
-                b'package grpc_protoc_plugin.invocation_testing.split_separate;'
-            ))
-        open(messages_proto_file, 'wb').write(
-            messages_proto_contents.replace(
-                _SPLIT_NAMESPACE,
-                b'package grpc_protoc_plugin.invocation_testing.split_separate;'
-            ))
-        protoc_result = protoc.main([
-            '',
-            '--proto_path={}'.format(self.proto_directory),
-            '--python_out={}'.format(self.python_out_directory),
-            '--grpc_python_out=grpc_2_0:{}'.format(
-                self.grpc_python_out_directory),
-            services_proto_file,
-            messages_proto_file,
-        ])
-        if protoc_result != 0:
-            raise Exception("unexpected protoc error")
-        open(os.path.join(self.python_out_directory, '__init__.py'),
-             'w').write('')
-        self.pb2_import = 'split_separate_messages_pb2'
-        self.pb2_grpc_import = 'split_separate_services_pb2_grpc'
-        self.should_find_services_in_pb2 = False
+        self._directory = tempfile.mkdtemp(suffix=self.NAME, dir='.')
+        self._proto_path = path.join(self._directory, _RELATIVE_PROTO_PATH)
+        self._python_out = path.join(self._directory, _RELATIVE_PYTHON_OUT)
+
+        os.makedirs(self._proto_path)
+        os.makedirs(self._python_out)
+
+        proto_directories_and_names = {
+            (self.MESSAGES_PROTO_RELATIVE_DIRECTORY_NAMES,
+             self.MESSAGES_PROTO_FILE_NAME,),
+            (self.SERVICES_PROTO_RELATIVE_DIRECTORY_NAMES,
+             self.SERVICES_PROTO_FILE_NAME,),
+        }
+        messages_proto_relative_file_name_forward_slashes = '/'.join(
+            self.MESSAGES_PROTO_RELATIVE_DIRECTORY_NAMES + (
+                self.MESSAGES_PROTO_FILE_NAME,))
+        _create_directory_tree(self._proto_path, (
+            relative_proto_directory_names
+            for relative_proto_directory_names, _ in proto_directories_and_names
+        ))
+        self._absolute_proto_file_names = set()
+        for relative_directory_names, file_name in proto_directories_and_names:
+            absolute_proto_file_name = path.join(
+                self._proto_path, *relative_directory_names + (file_name,))
+            raw_proto_content = pkgutil.get_data(
+                'tests.protoc_plugin.protos.invocation_testing',
+                path.join(*relative_directory_names + (file_name,)))
+            massaged_proto_content = _massage_proto_content(
+                raw_proto_content,
+                self.NAME.encode(),
+                messages_proto_relative_file_name_forward_slashes.encode())
+            with open(absolute_proto_file_name, 'wb') as proto_file:
+                proto_file.write(massaged_proto_content)
+            self._absolute_proto_file_names.add(absolute_proto_file_name)
 
     def tearDown(self):
-        shutil.rmtree(self.directory)
+        shutil.rmtree(self._directory)
+
+    def _protoc(self):
+        protoc_exit_codes = self.PROTOC_STYLE.protoc(
+            self._proto_path, self._python_out, self._absolute_proto_file_names)
+        for protoc_exit_code in protoc_exit_codes:
+            self.assertEqual(0, protoc_exit_code)
+
+        _packagify(self._python_out)
+
+        generated_modules = {}
+        expected_generated_full_module_names = {
+            self.EXPECTED_MESSAGES_PB2,
+            self.EXPECTED_SERVICES_PB2,
+            self.EXPECTED_SERVICES_PB2_GRPC,
+        }
+        with _system_path([self._python_out]):
+            for full_module_name in expected_generated_full_module_names:
+                module = importlib.import_module(full_module_name)
+                generated_modules[full_module_name] = module
+
+        self._messages_pb2 = generated_modules[self.EXPECTED_MESSAGES_PB2]
+        self._services_pb2 = generated_modules[self.EXPECTED_SERVICES_PB2]
+        self._services_pb2_grpc = generated_modules[
+            self.EXPECTED_SERVICES_PB2_GRPC]
+
+    def _services_modules(self):
+        if self.PROTOC_STYLE.grpc_in_pb2_expected():
+            return self._services_pb2, self._services_pb2_grpc,
+        else:
+            return self._services_pb2_grpc,
+
+    def test_imported_attributes(self):
+        self._protoc()
+
+        self._messages_pb2.Request
+        self._messages_pb2.Response
+        self._services_pb2.DESCRIPTOR.services_by_name['TestService']
+        for services_module in self._services_modules():
+            services_module.TestServiceStub
+            services_module.TestServiceServicer
+            services_module.add_TestServiceServicer_to_server
+
+    def test_call(self):
+        self._protoc()
+
+        for services_module in self._services_modules():
+            server = grpc.server(
+                futures.ThreadPoolExecutor(
+                    max_workers=test_constants.POOL_SIZE))
+            services_module.add_TestServiceServicer_to_server(
+                _Servicer(self._messages_pb2.Response), server)
+            port = server.add_insecure_port('[::]:0')
+            server.start()
+            channel = grpc.insecure_channel('localhost:{}'.format(port))
+            stub = services_module.TestServiceStub(channel)
+            response = stub.Call(self._messages_pb2.Request())
+            self.assertEqual(self._messages_pb2.Response(), response)
+
+
+def _create_test_case_class(split_proto, protoc_style):
+    attributes = {}
+
+    name = '{}{}'.format('SplitProto' if split_proto else 'SameProto',
+                         protoc_style.name())
+    attributes['NAME'] = name
+
+    if split_proto:
+        attributes['MESSAGES_PROTO_RELATIVE_DIRECTORY_NAMES'] = (
+            'split_messages', 'sub',)
+        attributes['MESSAGES_PROTO_FILE_NAME'] = 'messages.proto'
+        attributes['SERVICES_PROTO_RELATIVE_DIRECTORY_NAMES'] = (
+            'split_services',)
+        attributes['SERVICES_PROTO_FILE_NAME'] = 'services.proto'
+        attributes['EXPECTED_MESSAGES_PB2'] = 'split_messages.sub.messages_pb2'
+        attributes['EXPECTED_SERVICES_PB2'] = 'split_services.services_pb2'
+        attributes['EXPECTED_SERVICES_PB2_GRPC'] = (
+            'split_services.services_pb2_grpc')
+    else:
+        attributes['MESSAGES_PROTO_RELATIVE_DIRECTORY_NAMES'] = ()
+        attributes['MESSAGES_PROTO_FILE_NAME'] = 'same.proto'
+        attributes['SERVICES_PROTO_RELATIVE_DIRECTORY_NAMES'] = ()
+        attributes['SERVICES_PROTO_FILE_NAME'] = 'same.proto'
+        attributes['EXPECTED_MESSAGES_PB2'] = 'same_pb2'
+        attributes['EXPECTED_SERVICES_PB2'] = 'same_pb2'
+        attributes['EXPECTED_SERVICES_PB2_GRPC'] = 'same_pb2_grpc'
+
+    attributes['PROTOC_STYLE'] = protoc_style
+
+    attributes['__module__'] = _Test.__module__
+
+    return type('{}Test'.format(name), (_Test,), attributes)
+
+
+def _create_test_case_classes():
+    for split_proto in (False, True,):
+        for protoc_style in _PROTOC_STYLES:
+            yield _create_test_case_class(split_proto, protoc_style)
+
+
+def load_tests(loader, tests, pattern):
+    tests = tuple(
+        loader.loadTestsFromTestCase(test_case_class)
+        for test_case_class in _create_test_case_classes())
+    return unittest.TestSuite(tests=tests)
 
 
 if __name__ == '__main__':
diff --git a/src/python/grpcio_tests/tests/protoc_plugin/beta_python_plugin_test.py b/src/python/grpcio_tests/tests/protoc_plugin/beta_python_plugin_test.py
index 83f21ecbbb..424b153ff8 100644
--- a/src/python/grpcio_tests/tests/protoc_plugin/beta_python_plugin_test.py
+++ b/src/python/grpcio_tests/tests/protoc_plugin/beta_python_plugin_test.py
@@ -12,19 +12,15 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import argparse
 import contextlib
-import distutils.spawn
-import errno
-import itertools
+import importlib
 import os
-import pkg_resources
+from os import path
+import pkgutil
 import shutil
-import subprocess
 import sys
 import tempfile
 import threading
-import time
 import unittest
 
 from six import moves
@@ -33,12 +29,22 @@ from grpc.beta import implementations
 from grpc.beta import interfaces
 from grpc.framework.foundation import future
 from grpc.framework.interfaces.face import face
+from grpc_tools import protoc
 from tests.unit.framework.common import test_constants
 
-import tests.protoc_plugin.protos.payload.test_payload_pb2 as payload_pb2
-import tests.protoc_plugin.protos.requests.r.test_requests_pb2 as request_pb2
-import tests.protoc_plugin.protos.responses.test_responses_pb2 as response_pb2
-import tests.protoc_plugin.protos.service.test_service_pb2 as service_pb2
+_RELATIVE_PROTO_PATH = 'relative_proto_path'
+_RELATIVE_PYTHON_OUT = 'relative_python_out'
+
+_PROTO_FILES_PATH_COMPONENTS = (
+    ('beta_grpc_plugin_test', 'payload', 'test_payload.proto',),
+    ('beta_grpc_plugin_test', 'requests', 'r', 'test_requests.proto',),
+    ('beta_grpc_plugin_test', 'responses', 'test_responses.proto',),
+    ('beta_grpc_plugin_test', 'service', 'test_service.proto',),)
+
+_PAYLOAD_PB2 = 'beta_grpc_plugin_test.payload.test_payload_pb2'
+_REQUESTS_PB2 = 'beta_grpc_plugin_test.requests.r.test_requests_pb2'
+_RESPONSES_PB2 = 'beta_grpc_plugin_test.responses.test_responses_pb2'
+_SERVICE_PB2 = 'beta_grpc_plugin_test.service.test_service_pb2'
 
 # Identifiers of entities we expect to find in the generated module.
 SERVICER_IDENTIFIER = 'BetaTestServiceServicer'
@@ -47,12 +53,50 @@ SERVER_FACTORY_IDENTIFIER = 'beta_create_TestService_server'
 STUB_FACTORY_IDENTIFIER = 'beta_create_TestService_stub'
 
 
+@contextlib.contextmanager
+def _system_path(path_insertion):
+    old_system_path = sys.path[:]
+    sys.path = sys.path[0:1] + path_insertion + sys.path[1:]
+    yield
+    sys.path = old_system_path
+
+
+def _create_directory_tree(root, path_components_sequence):
+    created = set()
+    for path_components in path_components_sequence:
+        thus_far = ''
+        for path_component in path_components:
+            relative_path = path.join(thus_far, path_component)
+            if relative_path not in created:
+                os.makedirs(path.join(root, relative_path))
+                created.add(relative_path)
+            thus_far = path.join(thus_far, path_component)
+
+
+def _massage_proto_content(raw_proto_content):
+    imports_substituted = raw_proto_content.replace(
+        b'import "tests/protoc_plugin/protos/',
+        b'import "beta_grpc_plugin_test/')
+    package_statement_substituted = imports_substituted.replace(
+        b'package grpc_protoc_plugin;', b'package beta_grpc_protoc_plugin;')
+    return package_statement_substituted
+
+
+def _packagify(directory):
+    for subdirectory, _, _ in os.walk(directory):
+        init_file_name = path.join(subdirectory, '__init__.py')
+        with open(init_file_name, 'wb') as init_file:
+            init_file.write(b'')
+
+
 class _ServicerMethods(object):
 
-    def __init__(self):
+    def __init__(self, payload_pb2, responses_pb2):
         self._condition = threading.Condition()
         self._paused = False
         self._fail = False
+        self._payload_pb2 = payload_pb2
+        self._responses_pb2 = responses_pb2
 
     @contextlib.contextmanager
     def pause(self):  # pylint: disable=invalid-name
@@ -79,22 +123,22 @@ class _ServicerMethods(object):
                 self._condition.wait()
 
     def UnaryCall(self, request, unused_rpc_context):
-        response = response_pb2.SimpleResponse()
-        response.payload.payload_type = payload_pb2.COMPRESSABLE
+        response = self._responses_pb2.SimpleResponse()
+        response.payload.payload_type = self._payload_pb2.COMPRESSABLE
         response.payload.payload_compressable = 'a' * request.response_size
         self._control()
         return response
 
     def StreamingOutputCall(self, request, unused_rpc_context):
         for parameter in request.response_parameters:
-            response = response_pb2.StreamingOutputCallResponse()
-            response.payload.payload_type = payload_pb2.COMPRESSABLE
+            response = self._responses_pb2.StreamingOutputCallResponse()
+            response.payload.payload_type = self._payload_pb2.COMPRESSABLE
             response.payload.payload_compressable = 'a' * parameter.size
             self._control()
             yield response
 
     def StreamingInputCall(self, request_iter, unused_rpc_context):
-        response = response_pb2.StreamingInputCallResponse()
+        response = self._responses_pb2.StreamingInputCallResponse()
         aggregated_payload_size = 0
         for request in request_iter:
             aggregated_payload_size += len(request.payload.payload_compressable)
@@ -105,8 +149,8 @@ class _ServicerMethods(object):
     def FullDuplexCall(self, request_iter, unused_rpc_context):
         for request in request_iter:
             for parameter in request.response_parameters:
-                response = response_pb2.StreamingOutputCallResponse()
-                response.payload.payload_type = payload_pb2.COMPRESSABLE
+                response = self._responses_pb2.StreamingOutputCallResponse()
+                response.payload.payload_type = self._payload_pb2.COMPRESSABLE
                 response.payload.payload_compressable = 'a' * parameter.size
                 self._control()
                 yield response
@@ -115,8 +159,8 @@ class _ServicerMethods(object):
         responses = []
         for request in request_iter:
             for parameter in request.response_parameters:
-                response = response_pb2.StreamingOutputCallResponse()
-                response.payload.payload_type = payload_pb2.COMPRESSABLE
+                response = self._responses_pb2.StreamingOutputCallResponse()
+                response.payload.payload_type = self._payload_pb2.COMPRESSABLE
                 response.payload.payload_compressable = 'a' * parameter.size
                 self._control()
                 responses.append(response)
@@ -125,7 +169,7 @@ class _ServicerMethods(object):
 
 
 @contextlib.contextmanager
-def _CreateService():
+def _CreateService(payload_pb2, responses_pb2, service_pb2):
     """Provides a servicer backend and a stub.
 
   The servicer is just the implementation of the actual servicer passed to the
@@ -136,7 +180,7 @@ def _CreateService():
       the service bound to the stub and and stub is the stub on which to invoke
       RPCs.
   """
-    servicer_methods = _ServicerMethods()
+    servicer_methods = _ServicerMethods(payload_pb2, responses_pb2)
 
     class Servicer(getattr(service_pb2, SERVICER_IDENTIFIER)):
 
@@ -161,12 +205,12 @@ def _CreateService():
     server.start()
     channel = implementations.insecure_channel('localhost', port)
     stub = getattr(service_pb2, STUB_FACTORY_IDENTIFIER)(channel)
-    yield (servicer_methods, stub)
+    yield servicer_methods, stub,
     server.stop(0)
 
 
 @contextlib.contextmanager
-def _CreateIncompleteService():
+def _CreateIncompleteService(service_pb2):
     """Provides a servicer backend that fails to implement methods and its stub.
 
   The servicer is just the implementation of the actual servicer passed to the
@@ -192,16 +236,16 @@ def _CreateIncompleteService():
     server.stop(0)
 
 
-def _streaming_input_request_iterator():
+def _streaming_input_request_iterator(payload_pb2, requests_pb2):
     for _ in range(3):
-        request = request_pb2.StreamingInputCallRequest()
+        request = requests_pb2.StreamingInputCallRequest()
         request.payload.payload_type = payload_pb2.COMPRESSABLE
         request.payload.payload_compressable = 'a'
         yield request
 
 
-def _streaming_output_request():
-    request = request_pb2.StreamingOutputCallRequest()
+def _streaming_output_request(requests_pb2):
+    request = requests_pb2.StreamingOutputCallRequest()
     sizes = [1, 2, 3]
     request.response_parameters.add(size=sizes[0], interval_us=0)
     request.response_parameters.add(size=sizes[1], interval_us=0)
@@ -209,11 +253,11 @@ def _streaming_output_request():
     return request
 
 
-def _full_duplex_request_iterator():
-    request = request_pb2.StreamingOutputCallRequest()
+def _full_duplex_request_iterator(requests_pb2):
+    request = requests_pb2.StreamingOutputCallRequest()
     request.response_parameters.add(size=1, interval_us=0)
     yield request
-    request = request_pb2.StreamingOutputCallRequest()
+    request = requests_pb2.StreamingOutputCallRequest()
     request.response_parameters.add(size=2, interval_us=0)
     request.response_parameters.add(size=3, interval_us=0)
     yield request
@@ -227,22 +271,78 @@ class PythonPluginTest(unittest.TestCase):
   methods and does not exist for response-streaming methods.
   """
 
+    def setUp(self):
+        self._directory = tempfile.mkdtemp(dir='.')
+        self._proto_path = path.join(self._directory, _RELATIVE_PROTO_PATH)
+        self._python_out = path.join(self._directory, _RELATIVE_PYTHON_OUT)
+
+        os.makedirs(self._proto_path)
+        os.makedirs(self._python_out)
+
+        directories_path_components = {
+            proto_file_path_components[:-1]
+            for proto_file_path_components in _PROTO_FILES_PATH_COMPONENTS
+        }
+        _create_directory_tree(self._proto_path, directories_path_components)
+        self._proto_file_names = set()
+        for proto_file_path_components in _PROTO_FILES_PATH_COMPONENTS:
+            raw_proto_content = pkgutil.get_data(
+                'tests.protoc_plugin.protos',
+                path.join(*proto_file_path_components[1:]))
+            massaged_proto_content = _massage_proto_content(raw_proto_content)
+            proto_file_name = path.join(self._proto_path,
+                                        *proto_file_path_components)
+            with open(proto_file_name, 'wb') as proto_file:
+                proto_file.write(massaged_proto_content)
+            self._proto_file_names.add(proto_file_name)
+
+    def tearDown(self):
+        shutil.rmtree(self._directory)
+
+    def _protoc(self):
+        args = [
+            '',
+            '--proto_path={}'.format(self._proto_path),
+            '--python_out={}'.format(self._python_out),
+            '--grpc_python_out=grpc_1_0:{}'.format(self._python_out),
+        ] + list(self._proto_file_names)
+        protoc_exit_code = protoc.main(args)
+        self.assertEqual(0, protoc_exit_code)
+
+        _packagify(self._python_out)
+
+        with _system_path([
+                self._python_out,
+        ]):
+            self._payload_pb2 = importlib.import_module(_PAYLOAD_PB2)
+            self._requests_pb2 = importlib.import_module(_REQUESTS_PB2)
+            self._responses_pb2 = importlib.import_module(_RESPONSES_PB2)
+            self._service_pb2 = importlib.import_module(_SERVICE_PB2)
+
     def testImportAttributes(self):
+        self._protoc()
+
         # check that we can access the generated module and its members.
-        self.assertIsNotNone(getattr(service_pb2, SERVICER_IDENTIFIER, None))
-        self.assertIsNotNone(getattr(service_pb2, STUB_IDENTIFIER, None))
         self.assertIsNotNone(
-            getattr(service_pb2, SERVER_FACTORY_IDENTIFIER, None))
+            getattr(self._service_pb2, SERVICER_IDENTIFIER, None))
+        self.assertIsNotNone(getattr(self._service_pb2, STUB_IDENTIFIER, None))
         self.assertIsNotNone(
-            getattr(service_pb2, STUB_FACTORY_IDENTIFIER, None))
+            getattr(self._service_pb2, SERVER_FACTORY_IDENTIFIER, None))
+        self.assertIsNotNone(
+            getattr(self._service_pb2, STUB_FACTORY_IDENTIFIER, None))
 
     def testUpDown(self):
-        with _CreateService():
-            request_pb2.SimpleRequest(response_size=13)
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2):
+            self._requests_pb2.SimpleRequest(response_size=13)
 
     def testIncompleteServicer(self):
-        with _CreateIncompleteService() as (_, stub):
-            request = request_pb2.SimpleRequest(response_size=13)
+        self._protoc()
+
+        with _CreateIncompleteService(self._service_pb2) as (_, stub):
+            request = self._requests_pb2.SimpleRequest(response_size=13)
             try:
                 stub.UnaryCall(request, test_constants.LONG_TIMEOUT)
             except face.AbortionError as error:
@@ -250,15 +350,21 @@ class PythonPluginTest(unittest.TestCase):
                                  error.code)
 
     def testUnaryCall(self):
-        with _CreateService() as (methods, stub):
-            request = request_pb2.SimpleRequest(response_size=13)
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
+            request = self._requests_pb2.SimpleRequest(response_size=13)
             response = stub.UnaryCall(request, test_constants.LONG_TIMEOUT)
         expected_response = methods.UnaryCall(request, 'not a real context!')
         self.assertEqual(expected_response, response)
 
     def testUnaryCallFuture(self):
-        with _CreateService() as (methods, stub):
-            request = request_pb2.SimpleRequest(response_size=13)
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
+            request = self._requests_pb2.SimpleRequest(response_size=13)
             # Check that the call does not block waiting for the server to respond.
             with methods.pause():
                 response_future = stub.UnaryCall.future(
@@ -268,8 +374,11 @@ class PythonPluginTest(unittest.TestCase):
         self.assertEqual(expected_response, response)
 
     def testUnaryCallFutureExpired(self):
-        with _CreateService() as (methods, stub):
-            request = request_pb2.SimpleRequest(response_size=13)
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
+            request = self._requests_pb2.SimpleRequest(response_size=13)
             with methods.pause():
                 response_future = stub.UnaryCall.future(
                     request, test_constants.SHORT_TIMEOUT)
@@ -277,24 +386,33 @@ class PythonPluginTest(unittest.TestCase):
                     response_future.result()
 
     def testUnaryCallFutureCancelled(self):
-        with _CreateService() as (methods, stub):
-            request = request_pb2.SimpleRequest(response_size=13)
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
+            request = self._requests_pb2.SimpleRequest(response_size=13)
             with methods.pause():
                 response_future = stub.UnaryCall.future(request, 1)
                 response_future.cancel()
                 self.assertTrue(response_future.cancelled())
 
     def testUnaryCallFutureFailed(self):
-        with _CreateService() as (methods, stub):
-            request = request_pb2.SimpleRequest(response_size=13)
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
+            request = self._requests_pb2.SimpleRequest(response_size=13)
             with methods.fail():
                 response_future = stub.UnaryCall.future(
                     request, test_constants.LONG_TIMEOUT)
                 self.assertIsNotNone(response_future.exception())
 
     def testStreamingOutputCall(self):
-        with _CreateService() as (methods, stub):
-            request = _streaming_output_request()
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
+            request = _streaming_output_request(self._requests_pb2)
             responses = stub.StreamingOutputCall(request,
                                                  test_constants.LONG_TIMEOUT)
             expected_responses = methods.StreamingOutputCall(
@@ -304,8 +422,11 @@ class PythonPluginTest(unittest.TestCase):
                 self.assertEqual(expected_response, response)
 
     def testStreamingOutputCallExpired(self):
-        with _CreateService() as (methods, stub):
-            request = _streaming_output_request()
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
+            request = _streaming_output_request(self._requests_pb2)
             with methods.pause():
                 responses = stub.StreamingOutputCall(
                     request, test_constants.SHORT_TIMEOUT)
@@ -313,8 +434,11 @@ class PythonPluginTest(unittest.TestCase):
                     list(responses)
 
     def testStreamingOutputCallCancelled(self):
-        with _CreateService() as (methods, stub):
-            request = _streaming_output_request()
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
+            request = _streaming_output_request(self._requests_pb2)
             responses = stub.StreamingOutputCall(request,
                                                  test_constants.LONG_TIMEOUT)
             next(responses)
@@ -323,8 +447,11 @@ class PythonPluginTest(unittest.TestCase):
                 next(responses)
 
     def testStreamingOutputCallFailed(self):
-        with _CreateService() as (methods, stub):
-            request = _streaming_output_request()
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
+            request = _streaming_output_request(self._requests_pb2)
             with methods.fail():
                 responses = stub.StreamingOutputCall(request, 1)
                 self.assertIsNotNone(responses)
@@ -332,30 +459,46 @@ class PythonPluginTest(unittest.TestCase):
                     next(responses)
 
     def testStreamingInputCall(self):
-        with _CreateService() as (methods, stub):
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
             response = stub.StreamingInputCall(
-                _streaming_input_request_iterator(),
+                _streaming_input_request_iterator(self._payload_pb2,
+                                                  self._requests_pb2),
                 test_constants.LONG_TIMEOUT)
         expected_response = methods.StreamingInputCall(
-            _streaming_input_request_iterator(), 'not a real RpcContext!')
+            _streaming_input_request_iterator(self._payload_pb2,
+                                              self._requests_pb2),
+            'not a real RpcContext!')
         self.assertEqual(expected_response, response)
 
     def testStreamingInputCallFuture(self):
-        with _CreateService() as (methods, stub):
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
             with methods.pause():
                 response_future = stub.StreamingInputCall.future(
-                    _streaming_input_request_iterator(),
+                    _streaming_input_request_iterator(self._payload_pb2,
+                                                      self._requests_pb2),
                     test_constants.LONG_TIMEOUT)
             response = response_future.result()
         expected_response = methods.StreamingInputCall(
-            _streaming_input_request_iterator(), 'not a real RpcContext!')
+            _streaming_input_request_iterator(self._payload_pb2,
+                                              self._requests_pb2),
+            'not a real RpcContext!')
         self.assertEqual(expected_response, response)
 
     def testStreamingInputCallFutureExpired(self):
-        with _CreateService() as (methods, stub):
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
             with methods.pause():
                 response_future = stub.StreamingInputCall.future(
-                    _streaming_input_request_iterator(),
+                    _streaming_input_request_iterator(self._payload_pb2,
+                                                      self._requests_pb2),
                     test_constants.SHORT_TIMEOUT)
                 with self.assertRaises(face.ExpirationError):
                     response_future.result()
@@ -363,10 +506,14 @@ class PythonPluginTest(unittest.TestCase):
                                       face.ExpirationError)
 
     def testStreamingInputCallFutureCancelled(self):
-        with _CreateService() as (methods, stub):
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
             with methods.pause():
                 response_future = stub.StreamingInputCall.future(
-                    _streaming_input_request_iterator(),
+                    _streaming_input_request_iterator(self._payload_pb2,
+                                                      self._requests_pb2),
                     test_constants.LONG_TIMEOUT)
                 response_future.cancel()
                 self.assertTrue(response_future.cancelled())
@@ -374,26 +521,38 @@ class PythonPluginTest(unittest.TestCase):
                 response_future.result()
 
     def testStreamingInputCallFutureFailed(self):
-        with _CreateService() as (methods, stub):
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
             with methods.fail():
                 response_future = stub.StreamingInputCall.future(
-                    _streaming_input_request_iterator(),
+                    _streaming_input_request_iterator(self._payload_pb2,
+                                                      self._requests_pb2),
                     test_constants.LONG_TIMEOUT)
                 self.assertIsNotNone(response_future.exception())
 
     def testFullDuplexCall(self):
-        with _CreateService() as (methods, stub):
-            responses = stub.FullDuplexCall(_full_duplex_request_iterator(),
-                                            test_constants.LONG_TIMEOUT)
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
+            responses = stub.FullDuplexCall(
+                _full_duplex_request_iterator(self._requests_pb2),
+                test_constants.LONG_TIMEOUT)
             expected_responses = methods.FullDuplexCall(
-                _full_duplex_request_iterator(), 'not a real RpcContext!')
+                _full_duplex_request_iterator(self._requests_pb2),
+                'not a real RpcContext!')
             for expected_response, response in moves.zip_longest(
                     expected_responses, responses):
                 self.assertEqual(expected_response, response)
 
     def testFullDuplexCallExpired(self):
-        request_iterator = _full_duplex_request_iterator()
-        with _CreateService() as (methods, stub):
+        self._protoc()
+
+        request_iterator = _full_duplex_request_iterator(self._requests_pb2)
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
             with methods.pause():
                 responses = stub.FullDuplexCall(request_iterator,
                                                 test_constants.SHORT_TIMEOUT)
@@ -401,8 +560,11 @@ class PythonPluginTest(unittest.TestCase):
                     list(responses)
 
     def testFullDuplexCallCancelled(self):
-        with _CreateService() as (methods, stub):
-            request_iterator = _full_duplex_request_iterator()
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
+            request_iterator = _full_duplex_request_iterator(self._requests_pb2)
             responses = stub.FullDuplexCall(request_iterator,
                                             test_constants.LONG_TIMEOUT)
             next(responses)
@@ -411,8 +573,11 @@ class PythonPluginTest(unittest.TestCase):
                 next(responses)
 
     def testFullDuplexCallFailed(self):
-        request_iterator = _full_duplex_request_iterator()
-        with _CreateService() as (methods, stub):
+        self._protoc()
+
+        request_iterator = _full_duplex_request_iterator(self._requests_pb2)
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
             with methods.fail():
                 responses = stub.FullDuplexCall(request_iterator,
                                                 test_constants.LONG_TIMEOUT)
@@ -421,13 +586,16 @@ class PythonPluginTest(unittest.TestCase):
                     next(responses)
 
     def testHalfDuplexCall(self):
-        with _CreateService() as (methods, stub):
+        self._protoc()
+
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
 
             def half_duplex_request_iterator():
-                request = request_pb2.StreamingOutputCallRequest()
+                request = self._requests_pb2.StreamingOutputCallRequest()
                 request.response_parameters.add(size=1, interval_us=0)
                 yield request
-                request = request_pb2.StreamingOutputCallRequest()
+                request = self._requests_pb2.StreamingOutputCallRequest()
                 request.response_parameters.add(size=2, interval_us=0)
                 request.response_parameters.add(size=3, interval_us=0)
                 yield request
@@ -441,6 +609,8 @@ class PythonPluginTest(unittest.TestCase):
                 self.assertEqual(expected_response, response)
 
     def testHalfDuplexCallWedged(self):
+        self._protoc()
+
         condition = threading.Condition()
         wait_cell = [False]
 
@@ -455,14 +625,15 @@ class PythonPluginTest(unittest.TestCase):
                 condition.notify_all()
 
         def half_duplex_request_iterator():
-            request = request_pb2.StreamingOutputCallRequest()
+            request = self._requests_pb2.StreamingOutputCallRequest()
             request.response_parameters.add(size=1, interval_us=0)
             yield request
             with condition:
                 while wait_cell[0]:
                     condition.wait()
 
-        with _CreateService() as (methods, stub):
+        with _CreateService(self._payload_pb2, self._responses_pb2,
+                            self._service_pb2) as (methods, stub):
             with wait():
                 responses = stub.HalfDuplexCall(half_duplex_request_iterator(),
                                                 test_constants.SHORT_TIMEOUT)
diff --git a/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_messages/messages.proto b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_messages/sub/messages.proto
index 1b780c69ba..1b780c69ba 100644
--- a/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_messages/messages.proto
+++ b/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_messages/sub/messages.proto
diff --git a/src/python/grpcio_tests/tests/qps/benchmark_client.py b/src/python/grpcio_tests/tests/qps/benchmark_client.py
index 5f4df79c5b..17fa61ea36 100644
--- a/src/python/grpcio_tests/tests/qps/benchmark_client.py
+++ b/src/python/grpcio_tests/tests/qps/benchmark_client.py
@@ -22,7 +22,7 @@ from six.moves import queue
 
 import grpc
 from src.proto.grpc.testing import messages_pb2
-from src.proto.grpc.testing import services_pb2
+from src.proto.grpc.testing import services_pb2_grpc
 from tests.unit import resources
 from tests.unit import test_common
 
@@ -58,7 +58,7 @@ class BenchmarkClient:
 
         if config.payload_config.WhichOneof('payload') == 'simple_params':
             self._generic = False
-            self._stub = services_pb2.BenchmarkServiceStub(channel)
+            self._stub = services_pb2_grpc.BenchmarkServiceStub(channel)
             payload = messages_pb2.Payload(
                 body='\0' * config.payload_config.simple_params.req_size)
             self._request = messages_pb2.SimpleRequest(
diff --git a/src/python/grpcio_tests/tests/qps/benchmark_server.py b/src/python/grpcio_tests/tests/qps/benchmark_server.py
index 05101fdc6d..bb07844491 100644
--- a/src/python/grpcio_tests/tests/qps/benchmark_server.py
+++ b/src/python/grpcio_tests/tests/qps/benchmark_server.py
@@ -13,10 +13,10 @@
 # limitations under the License.
 
 from src.proto.grpc.testing import messages_pb2
-from src.proto.grpc.testing import services_pb2
+from src.proto.grpc.testing import services_pb2_grpc
 
 
-class BenchmarkServer(services_pb2.BenchmarkServiceServicer):
+class BenchmarkServer(services_pb2_grpc.BenchmarkServiceServicer):
     """Synchronous Server implementation for the Benchmark service."""
 
     def UnaryCall(self, request, context):
@@ -29,7 +29,7 @@ class BenchmarkServer(services_pb2.BenchmarkServiceServicer):
             yield messages_pb2.SimpleResponse(payload=payload)
 
 
-class GenericBenchmarkServer(services_pb2.BenchmarkServiceServicer):
+class GenericBenchmarkServer(services_pb2_grpc.BenchmarkServiceServicer):
     """Generic Server implementation for the Benchmark service."""
 
     def __init__(self, resp_size):
diff --git a/src/python/grpcio_tests/tests/stress/client.py b/src/python/grpcio_tests/tests/stress/client.py
index d5ff0064fd..40caa3926a 100644
--- a/src/python/grpcio_tests/tests/stress/client.py
+++ b/src/python/grpcio_tests/tests/stress/client.py
@@ -20,7 +20,7 @@ import threading
 import grpc
 from six.moves import queue
 from src.proto.grpc.testing import metrics_pb2_grpc
-from src.proto.grpc.testing import test_pb2
+from src.proto.grpc.testing import test_pb2_grpc
 
 from tests.interop import methods
 from tests.interop import resources
@@ -133,7 +133,7 @@ def run_test(args):
         for _ in xrange(args.num_channels_per_server):
             channel = _get_channel(test_server_target, args)
             for _ in xrange(args.num_stubs_per_channel):
-                stub = test_pb2.TestServiceStub(channel)
+                stub = test_pb2_grpc.TestServiceStub(channel)
                 runner = test_runner.TestRunner(stub, test_cases, hist,
                                                 exception_queue, stop_event)
                 runners.append(runner)
diff --git a/src/python/grpcio_tests/tests/stress/metrics_server.py b/src/python/grpcio_tests/tests/stress/metrics_server.py
index 11ab6c3f4e..33a74b4a38 100644
--- a/src/python/grpcio_tests/tests/stress/metrics_server.py
+++ b/src/python/grpcio_tests/tests/stress/metrics_server.py
@@ -16,11 +16,12 @@
 import time
 
 from src.proto.grpc.testing import metrics_pb2
+from src.proto.grpc.testing import metrics_pb2_grpc
 
 GAUGE_NAME = 'python_overall_qps'
 
 
-class MetricsServer(metrics_pb2.MetricsServiceServicer):
+class MetricsServer(metrics_pb2_grpc.MetricsServiceServicer):
 
     def __init__(self, histogram):
         self._start_time = time.time()
diff --git a/src/python/grpcio_tests/tests/tests.json b/src/python/grpcio_tests/tests/tests.json
index d61297b918..8512d5b96f 100644
--- a/src/python/grpcio_tests/tests/tests.json
+++ b/src/python/grpcio_tests/tests/tests.json
@@ -1,12 +1,17 @@
 [
+  "_sanity._sanity_test.SanityTest",
   "health_check._health_servicer_test.HealthServicerTest",
   "interop._insecure_intraop_test.InsecureIntraopTest",
   "interop._secure_intraop_test.SecureIntraopTest",
   "protoc_plugin._python_plugin_test.PythonPluginTest",
-  "protoc_plugin._split_definitions_test.SameCommonTest",
-  "protoc_plugin._split_definitions_test.SameSeparateTest",
-  "protoc_plugin._split_definitions_test.SplitCommonTest",
-  "protoc_plugin._split_definitions_test.SplitSeparateTest",
+  "protoc_plugin._split_definitions_test.SameProtoGrpcBeforeProtoProtocStyleTest",
+  "protoc_plugin._split_definitions_test.SameProtoMid2016ProtocStyleTest",
+  "protoc_plugin._split_definitions_test.SameProtoProtoBeforeGrpcProtocStyleTest",
+  "protoc_plugin._split_definitions_test.SameProtoSingleProtocExecutionProtocStyleTest",
+  "protoc_plugin._split_definitions_test.SplitProtoGrpcBeforeProtoProtocStyleTest",
+  "protoc_plugin._split_definitions_test.SplitProtoMid2016ProtocStyleTest",
+  "protoc_plugin._split_definitions_test.SplitProtoProtoBeforeGrpcProtocStyleTest",
+  "protoc_plugin._split_definitions_test.SplitProtoSingleProtocExecutionProtocStyleTest",
   "protoc_plugin.beta_python_plugin_test.PythonPluginTest",
   "reflection._reflection_servicer_test.ReflectionServicerTest",
   "testing._client_test.ClientTest",
@@ -26,6 +31,8 @@
   "unit._credentials_test.CredentialsTest",
   "unit._cython._cancel_many_calls_test.CancelManyCallsTest",
   "unit._cython._channel_test.ChannelTest",
+  "unit._cython._no_messages_server_completion_queue_per_call_test.Test",
+  "unit._cython._no_messages_single_server_completion_queue_test.Test",
   "unit._cython._read_some_but_not_all_responses_test.ReadSomeButNotAllResponsesTest",
   "unit._cython.cygrpc_test.InsecureServerInsecureClient",
   "unit._cython.cygrpc_test.SecureServerSecureClient",
@@ -39,7 +46,6 @@
   "unit._reconnect_test.ReconnectTest",
   "unit._resource_exhausted_test.ResourceExhaustedTest",
   "unit._rpc_test.RPCTest",
-  "unit._sanity._sanity_test.Sanity",
   "unit._thread_cleanup_test.CleanupThreadTest",
   "unit.beta._beta_features_test.BetaFeaturesTest",
   "unit.beta._beta_features_test.ContextManagementAndLifecycleTest",
diff --git a/src/python/grpcio_tests/tests/unit/_cython/_common.py b/src/python/grpcio_tests/tests/unit/_cython/_common.py
new file mode 100644
index 0000000000..ac66d1db3d
--- /dev/null
+++ b/src/python/grpcio_tests/tests/unit/_cython/_common.py
@@ -0,0 +1,118 @@
+# 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.
+"""Common utilities for tests of the Cython layer of gRPC Python."""
+
+import collections
+import threading
+
+from grpc._cython import cygrpc
+
+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),))
+
+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),))
+
+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),))
+
+
+class QueueDriver(object):
+
+    def __init__(self, condition, completion_queue):
+        self._condition = condition
+        self._completion_queue = completion_queue
+        self._due = collections.defaultdict(int)
+        self._events = collections.defaultdict(list)
+
+    def add_due(self, tags):
+        if not self._due:
+
+            def in_thread():
+                while True:
+                    event = self._completion_queue.poll()
+                    with self._condition:
+                        self._events[event.tag].append(event)
+                        self._due[event.tag] -= 1
+                        self._condition.notify_all()
+                        if self._due[event.tag] <= 0:
+                            self._due.pop(event.tag)
+                            if not self._due:
+                                return
+
+            thread = threading.Thread(target=in_thread)
+            thread.start()
+        for tag in tags:
+            self._due[tag] += 1
+
+    def event_with_tag(self, tag):
+        with self._condition:
+            while True:
+                if self._events[tag]:
+                    return self._events[tag].pop(0)
+                else:
+                    self._condition.wait()
+
+
+def execute_many_times(behavior):
+    return tuple(behavior() for _ in range(RPC_COUNT))
+
+
+class OperationResult(
+        collections.namedtuple('OperationResult', (
+            'start_batch_result', 'completion_type', 'success',))):
+    pass
+
+
+SUCCESSFUL_OPERATION_RESULT = OperationResult(
+    cygrpc.CallError.ok, cygrpc.CompletionType.operation_complete, True)
+
+
+class RpcTest(object):
+
+    def setUp(self):
+        self.server_completion_queue = cygrpc.CompletionQueue()
+        self.server = cygrpc.Server(cygrpc.ChannelArgs([]))
+        self.server.register_completion_queue(self.server_completion_queue)
+        port = self.server.add_http2_port(b'[::]:0')
+        self.server.start()
+        self.channel = cygrpc.Channel('localhost:{}'.format(port).encode(),
+                                      cygrpc.ChannelArgs([]))
+
+        self._server_shutdown_tag = 'server_shutdown_tag'
+        self.server_condition = threading.Condition()
+        self.server_driver = QueueDriver(self.server_condition,
+                                         self.server_completion_queue)
+        with self.server_condition:
+            self.server_driver.add_due({
+                self._server_shutdown_tag,
+            })
+
+        self.client_condition = threading.Condition()
+        self.client_completion_queue = cygrpc.CompletionQueue()
+        self.client_driver = QueueDriver(self.client_condition,
+                                         self.client_completion_queue)
+
+    def tearDown(self):
+        self.server.shutdown(self.server_completion_queue,
+                             self._server_shutdown_tag)
+        self.server.cancel_all_calls()
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
new file mode 100644
index 0000000000..14cc66675c
--- /dev/null
+++ b/src/python/grpcio_tests/tests/unit/_cython/_no_messages_server_completion_queue_per_call_test.py
@@ -0,0 +1,131 @@
+# 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 a corner-case at the level of the Cython API."""
+
+import threading
+import unittest
+
+from grpc._cython import cygrpc
+
+from tests.unit._cython import _common
+
+
+class Test(_common.RpcTest, unittest.TestCase):
+
+    def _do_rpcs(self):
+        server_call_condition = threading.Condition()
+        server_call_completion_queue = cygrpc.CompletionQueue()
+        server_call_driver = _common.QueueDriver(server_call_condition,
+                                                 server_call_completion_queue)
+
+        server_request_call_tag = 'server_request_call_tag'
+        server_send_initial_metadata_tag = 'server_send_initial_metadata_tag'
+        server_complete_rpc_tag = 'server_complete_rpc_tag'
+
+        with self.server_condition:
+            server_request_call_start_batch_result = self.server.request_call(
+                server_call_completion_queue, self.server_completion_queue,
+                server_request_call_tag)
+            self.server_driver.add_due({
+                server_request_call_tag,
+            })
+
+        client_call = self.channel.create_call(
+            None, _common.EMPTY_FLAGS, self.client_completion_queue,
+            b'/twinkies', None, _common.INFINITE_FUTURE)
+        client_receive_initial_metadata_tag = 'client_receive_initial_metadata_tag'
+        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_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)
+            self.client_driver.add_due({
+                client_receive_initial_metadata_tag,
+                client_complete_rpc_tag,
+            })
+
+        server_request_call_event = self.server_driver.event_with_tag(
+            server_request_call_tag)
+
+        with server_call_condition:
+            server_send_initial_metadata_start_batch_result = (
+                server_request_call_event.operation_call.start_server_batch([
+                    cygrpc.operation_send_initial_metadata(
+                        _common.INITIAL_METADATA, _common.EMPTY_FLAGS),
+                ], server_send_initial_metadata_tag))
+            server_call_driver.add_due({
+                server_send_initial_metadata_tag,
+            })
+        server_send_initial_metadata_event = server_call_driver.event_with_tag(
+            server_send_initial_metadata_tag)
+
+        with server_call_condition:
+            server_complete_rpc_start_batch_result = (
+                server_request_call_event.operation_call.start_server_batch([
+                    cygrpc.operation_receive_close_on_server(
+                        _common.EMPTY_FLAGS),
+                    cygrpc.operation_send_status_from_server(
+                        _common.TRAILING_METADATA, cygrpc.StatusCode.ok,
+                        b'test details', _common.EMPTY_FLAGS),
+                ], server_complete_rpc_tag))
+            server_call_driver.add_due({
+                server_complete_rpc_tag,
+            })
+        server_complete_rpc_event = server_call_driver.event_with_tag(
+            server_complete_rpc_tag)
+
+        client_receive_initial_metadata_event = self.client_driver.event_with_tag(
+            client_receive_initial_metadata_tag)
+        client_complete_rpc_event = self.client_driver.event_with_tag(
+            client_complete_rpc_tag)
+
+        return (_common.OperationResult(server_request_call_start_batch_result,
+                                        server_request_call_event.type,
+                                        server_request_call_event.success),
+                _common.OperationResult(
+                    client_receive_initial_metadata_start_batch_result,
+                    client_receive_initial_metadata_event.type,
+                    client_receive_initial_metadata_event.success),
+                _common.OperationResult(client_complete_rpc_start_batch_result,
+                                        client_complete_rpc_event.type,
+                                        client_complete_rpc_event.success),
+                _common.OperationResult(
+                    server_send_initial_metadata_start_batch_result,
+                    server_send_initial_metadata_event.type,
+                    server_send_initial_metadata_event.success),
+                _common.OperationResult(server_complete_rpc_start_batch_result,
+                                        server_complete_rpc_event.type,
+                                        server_complete_rpc_event.success),)
+
+    def test_rpcs(self):
+        expecteds = [(_common.SUCCESSFUL_OPERATION_RESULT,) *
+                     5] * _common.RPC_COUNT
+        actuallys = _common.execute_many_times(self._do_rpcs)
+        self.assertSequenceEqual(expecteds, actuallys)
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)
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
new file mode 100644
index 0000000000..1e44bcc4dc
--- /dev/null
+++ b/src/python/grpcio_tests/tests/unit/_cython/_no_messages_single_server_completion_queue_test.py
@@ -0,0 +1,126 @@
+# 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 a corner-case at the level of the Cython API."""
+
+import threading
+import unittest
+
+from grpc._cython import cygrpc
+
+from tests.unit._cython import _common
+
+
+class Test(_common.RpcTest, unittest.TestCase):
+
+    def _do_rpcs(self):
+        server_request_call_tag = 'server_request_call_tag'
+        server_send_initial_metadata_tag = 'server_send_initial_metadata_tag'
+        server_complete_rpc_tag = 'server_complete_rpc_tag'
+
+        with self.server_condition:
+            server_request_call_start_batch_result = self.server.request_call(
+                self.server_completion_queue, self.server_completion_queue,
+                server_request_call_tag)
+            self.server_driver.add_due({
+                server_request_call_tag,
+            })
+
+        client_call = self.channel.create_call(
+            None, _common.EMPTY_FLAGS, self.client_completion_queue,
+            b'/twinkies', None, _common.INFINITE_FUTURE)
+        client_receive_initial_metadata_tag = 'client_receive_initial_metadata_tag'
+        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_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)
+            self.client_driver.add_due({
+                client_receive_initial_metadata_tag,
+                client_complete_rpc_tag,
+            })
+
+        server_request_call_event = self.server_driver.event_with_tag(
+            server_request_call_tag)
+
+        with self.server_condition:
+            server_send_initial_metadata_start_batch_result = (
+                server_request_call_event.operation_call.start_server_batch([
+                    cygrpc.operation_send_initial_metadata(
+                        _common.INITIAL_METADATA, _common.EMPTY_FLAGS),
+                ], server_send_initial_metadata_tag))
+            self.server_driver.add_due({
+                server_send_initial_metadata_tag,
+            })
+        server_send_initial_metadata_event = self.server_driver.event_with_tag(
+            server_send_initial_metadata_tag)
+
+        with self.server_condition:
+            server_complete_rpc_start_batch_result = (
+                server_request_call_event.operation_call.start_server_batch([
+                    cygrpc.operation_receive_close_on_server(
+                        _common.EMPTY_FLAGS),
+                    cygrpc.operation_send_status_from_server(
+                        _common.TRAILING_METADATA, cygrpc.StatusCode.ok,
+                        b'test details', _common.EMPTY_FLAGS),
+                ], server_complete_rpc_tag))
+            self.server_driver.add_due({
+                server_complete_rpc_tag,
+            })
+        server_complete_rpc_event = self.server_driver.event_with_tag(
+            server_complete_rpc_tag)
+
+        client_receive_initial_metadata_event = self.client_driver.event_with_tag(
+            client_receive_initial_metadata_tag)
+        client_complete_rpc_event = self.client_driver.event_with_tag(
+            client_complete_rpc_tag)
+
+        return (_common.OperationResult(server_request_call_start_batch_result,
+                                        server_request_call_event.type,
+                                        server_request_call_event.success),
+                _common.OperationResult(
+                    client_receive_initial_metadata_start_batch_result,
+                    client_receive_initial_metadata_event.type,
+                    client_receive_initial_metadata_event.success),
+                _common.OperationResult(client_complete_rpc_start_batch_result,
+                                        client_complete_rpc_event.type,
+                                        client_complete_rpc_event.success),
+                _common.OperationResult(
+                    server_send_initial_metadata_start_batch_result,
+                    server_send_initial_metadata_event.type,
+                    server_send_initial_metadata_event.success),
+                _common.OperationResult(server_complete_rpc_start_batch_result,
+                                        server_complete_rpc_event.type,
+                                        server_complete_rpc_event.success),)
+
+    def test_rpcs(self):
+        expecteds = [(_common.SUCCESSFUL_OPERATION_RESULT,) *
+                     5] * _common.RPC_COUNT
+        actuallys = _common.execute_many_times(self._do_rpcs)
+        self.assertSequenceEqual(expecteds, actuallys)
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)
diff --git a/src/ruby/end2end/killed_client_thread_client.rb b/src/ruby/end2end/killed_client_thread_client.rb
index 7d6ed8c8d7..493c0eb56a 100755
--- a/src/ruby/end2end/killed_client_thread_client.rb
+++ b/src/ruby/end2end/killed_client_thread_client.rb
@@ -35,7 +35,7 @@ def main
                                       :this_channel_is_insecure)
     stub.echo(Echo::EchoRequest.new(request: 'hello'))
     fail 'the clients rpc in this test shouldnt complete. ' \
-      'expecting SIGINT to happen in the middle of the call'
+      'expecting SIGTERM to happen in the middle of the call'
   end
   thd.join
 end
diff --git a/src/ruby/end2end/killed_client_thread_driver.rb b/src/ruby/end2end/killed_client_thread_driver.rb
index 09f05a4487..fce5d13e82 100755
--- a/src/ruby/end2end/killed_client_thread_driver.rb
+++ b/src/ruby/end2end/killed_client_thread_driver.rb
@@ -69,9 +69,9 @@ def main
     call_started_cv.wait(call_started_mu) until call_started.val
   end
 
-  # SIGINT the child process now that it's
+  # SIGTERM the child process now that it's
   # in the middle of an RPC (happening on a non-main thread)
-  Process.kill('SIGINT', client_pid)
+  Process.kill('SIGTERM', client_pid)
   STDERR.puts 'sent shutdown'
 
   begin
@@ -88,8 +88,8 @@ def main
   end
 
   client_exit_code = $CHILD_STATUS
-  if client_exit_code.termsig != 2 # SIGINT
-    fail 'expected client exit from SIGINT ' \
+  if client_exit_code.termsig != 15 # SIGTERM
+    fail 'expected client exit from SIGTERM ' \
       "but got child status: #{client_exit_code}"
   end
 
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.c b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
index 04ed565482..9e6b0260ab 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.c
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
@@ -22,16 +22,6 @@
 
 #include "rb_grpc_imports.generated.h"
 
-grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
-grpc_raw_compressed_byte_buffer_create_type grpc_raw_compressed_byte_buffer_create_import;
-grpc_byte_buffer_copy_type grpc_byte_buffer_copy_import;
-grpc_byte_buffer_length_type grpc_byte_buffer_length_import;
-grpc_byte_buffer_destroy_type grpc_byte_buffer_destroy_import;
-grpc_byte_buffer_reader_init_type grpc_byte_buffer_reader_init_import;
-grpc_byte_buffer_reader_destroy_type grpc_byte_buffer_reader_destroy_import;
-grpc_byte_buffer_reader_next_type grpc_byte_buffer_reader_next_import;
-grpc_byte_buffer_reader_readall_type grpc_byte_buffer_reader_readall_import;
-grpc_raw_byte_buffer_from_reader_type grpc_raw_byte_buffer_from_reader_import;
 census_initialize_type census_initialize_import;
 census_shutdown_type census_shutdown_import;
 census_supported_type census_supported_import;
@@ -60,6 +50,8 @@ census_define_resource_type census_define_resource_import;
 census_delete_resource_type census_delete_resource_import;
 census_resource_id_type census_resource_id_import;
 census_record_values_type census_record_values_import;
+grpc_compression_algorithm_is_message_type grpc_compression_algorithm_is_message_import;
+grpc_compression_algorithm_is_stream_type grpc_compression_algorithm_is_stream_import;
 grpc_compression_algorithm_parse_type grpc_compression_algorithm_parse_import;
 grpc_compression_algorithm_name_type grpc_compression_algorithm_name_import;
 grpc_compression_algorithm_for_level_type grpc_compression_algorithm_for_level_import;
@@ -165,6 +157,16 @@ grpc_ssl_server_credentials_create_ex_type grpc_ssl_server_credentials_create_ex
 grpc_server_add_secure_http2_port_type grpc_server_add_secure_http2_port_import;
 grpc_call_set_credentials_type grpc_call_set_credentials_import;
 grpc_server_credentials_set_auth_metadata_processor_type grpc_server_credentials_set_auth_metadata_processor_import;
+grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
+grpc_raw_compressed_byte_buffer_create_type grpc_raw_compressed_byte_buffer_create_import;
+grpc_byte_buffer_copy_type grpc_byte_buffer_copy_import;
+grpc_byte_buffer_length_type grpc_byte_buffer_length_import;
+grpc_byte_buffer_destroy_type grpc_byte_buffer_destroy_import;
+grpc_byte_buffer_reader_init_type grpc_byte_buffer_reader_init_import;
+grpc_byte_buffer_reader_destroy_type grpc_byte_buffer_reader_destroy_import;
+grpc_byte_buffer_reader_next_type grpc_byte_buffer_reader_next_import;
+grpc_byte_buffer_reader_readall_type grpc_byte_buffer_reader_readall_import;
+grpc_raw_byte_buffer_from_reader_type grpc_raw_byte_buffer_from_reader_import;
 grpc_slice_ref_type grpc_slice_ref_import;
 grpc_slice_unref_type grpc_slice_unref_import;
 grpc_slice_copy_type grpc_slice_copy_import;
@@ -327,16 +329,6 @@ gpr_sleep_until_type gpr_sleep_until_import;
 gpr_timespec_to_micros_type gpr_timespec_to_micros_import;
 
 void grpc_rb_load_imports(HMODULE library) {
-  grpc_raw_byte_buffer_create_import = (grpc_raw_byte_buffer_create_type) GetProcAddress(library, "grpc_raw_byte_buffer_create");
-  grpc_raw_compressed_byte_buffer_create_import = (grpc_raw_compressed_byte_buffer_create_type) GetProcAddress(library, "grpc_raw_compressed_byte_buffer_create");
-  grpc_byte_buffer_copy_import = (grpc_byte_buffer_copy_type) GetProcAddress(library, "grpc_byte_buffer_copy");
-  grpc_byte_buffer_length_import = (grpc_byte_buffer_length_type) GetProcAddress(library, "grpc_byte_buffer_length");
-  grpc_byte_buffer_destroy_import = (grpc_byte_buffer_destroy_type) GetProcAddress(library, "grpc_byte_buffer_destroy");
-  grpc_byte_buffer_reader_init_import = (grpc_byte_buffer_reader_init_type) GetProcAddress(library, "grpc_byte_buffer_reader_init");
-  grpc_byte_buffer_reader_destroy_import = (grpc_byte_buffer_reader_destroy_type) GetProcAddress(library, "grpc_byte_buffer_reader_destroy");
-  grpc_byte_buffer_reader_next_import = (grpc_byte_buffer_reader_next_type) GetProcAddress(library, "grpc_byte_buffer_reader_next");
-  grpc_byte_buffer_reader_readall_import = (grpc_byte_buffer_reader_readall_type) GetProcAddress(library, "grpc_byte_buffer_reader_readall");
-  grpc_raw_byte_buffer_from_reader_import = (grpc_raw_byte_buffer_from_reader_type) GetProcAddress(library, "grpc_raw_byte_buffer_from_reader");
   census_initialize_import = (census_initialize_type) GetProcAddress(library, "census_initialize");
   census_shutdown_import = (census_shutdown_type) GetProcAddress(library, "census_shutdown");
   census_supported_import = (census_supported_type) GetProcAddress(library, "census_supported");
@@ -365,6 +357,8 @@ void grpc_rb_load_imports(HMODULE library) {
   census_delete_resource_import = (census_delete_resource_type) GetProcAddress(library, "census_delete_resource");
   census_resource_id_import = (census_resource_id_type) GetProcAddress(library, "census_resource_id");
   census_record_values_import = (census_record_values_type) GetProcAddress(library, "census_record_values");
+  grpc_compression_algorithm_is_message_import = (grpc_compression_algorithm_is_message_type) GetProcAddress(library, "grpc_compression_algorithm_is_message");
+  grpc_compression_algorithm_is_stream_import = (grpc_compression_algorithm_is_stream_type) GetProcAddress(library, "grpc_compression_algorithm_is_stream");
   grpc_compression_algorithm_parse_import = (grpc_compression_algorithm_parse_type) GetProcAddress(library, "grpc_compression_algorithm_parse");
   grpc_compression_algorithm_name_import = (grpc_compression_algorithm_name_type) GetProcAddress(library, "grpc_compression_algorithm_name");
   grpc_compression_algorithm_for_level_import = (grpc_compression_algorithm_for_level_type) GetProcAddress(library, "grpc_compression_algorithm_for_level");
@@ -470,6 +464,16 @@ void grpc_rb_load_imports(HMODULE library) {
   grpc_server_add_secure_http2_port_import = (grpc_server_add_secure_http2_port_type) GetProcAddress(library, "grpc_server_add_secure_http2_port");
   grpc_call_set_credentials_import = (grpc_call_set_credentials_type) GetProcAddress(library, "grpc_call_set_credentials");
   grpc_server_credentials_set_auth_metadata_processor_import = (grpc_server_credentials_set_auth_metadata_processor_type) GetProcAddress(library, "grpc_server_credentials_set_auth_metadata_processor");
+  grpc_raw_byte_buffer_create_import = (grpc_raw_byte_buffer_create_type) GetProcAddress(library, "grpc_raw_byte_buffer_create");
+  grpc_raw_compressed_byte_buffer_create_import = (grpc_raw_compressed_byte_buffer_create_type) GetProcAddress(library, "grpc_raw_compressed_byte_buffer_create");
+  grpc_byte_buffer_copy_import = (grpc_byte_buffer_copy_type) GetProcAddress(library, "grpc_byte_buffer_copy");
+  grpc_byte_buffer_length_import = (grpc_byte_buffer_length_type) GetProcAddress(library, "grpc_byte_buffer_length");
+  grpc_byte_buffer_destroy_import = (grpc_byte_buffer_destroy_type) GetProcAddress(library, "grpc_byte_buffer_destroy");
+  grpc_byte_buffer_reader_init_import = (grpc_byte_buffer_reader_init_type) GetProcAddress(library, "grpc_byte_buffer_reader_init");
+  grpc_byte_buffer_reader_destroy_import = (grpc_byte_buffer_reader_destroy_type) GetProcAddress(library, "grpc_byte_buffer_reader_destroy");
+  grpc_byte_buffer_reader_next_import = (grpc_byte_buffer_reader_next_type) GetProcAddress(library, "grpc_byte_buffer_reader_next");
+  grpc_byte_buffer_reader_readall_import = (grpc_byte_buffer_reader_readall_type) GetProcAddress(library, "grpc_byte_buffer_reader_readall");
+  grpc_raw_byte_buffer_from_reader_import = (grpc_raw_byte_buffer_from_reader_type) GetProcAddress(library, "grpc_raw_byte_buffer_from_reader");
   grpc_slice_ref_import = (grpc_slice_ref_type) GetProcAddress(library, "grpc_slice_ref");
   grpc_slice_unref_import = (grpc_slice_unref_type) GetProcAddress(library, "grpc_slice_unref");
   grpc_slice_copy_import = (grpc_slice_copy_type) GetProcAddress(library, "grpc_slice_copy");
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index bfa48dbbb4..916deb4ade 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -25,12 +25,12 @@
 
 #include <windows.h>
 
-#include <grpc/byte_buffer.h>
 #include <grpc/census.h>
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
 #include <grpc/grpc_posix.h>
 #include <grpc/grpc_security.h>
+#include <grpc/impl/codegen/byte_buffer.h>
 #include <grpc/slice.h>
 #include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
@@ -47,36 +47,6 @@
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
 
-typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_create_type)(grpc_slice *slices, size_t nslices);
-extern grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
-#define grpc_raw_byte_buffer_create grpc_raw_byte_buffer_create_import
-typedef grpc_byte_buffer *(*grpc_raw_compressed_byte_buffer_create_type)(grpc_slice *slices, size_t nslices, grpc_compression_algorithm compression);
-extern grpc_raw_compressed_byte_buffer_create_type grpc_raw_compressed_byte_buffer_create_import;
-#define grpc_raw_compressed_byte_buffer_create grpc_raw_compressed_byte_buffer_create_import
-typedef grpc_byte_buffer *(*grpc_byte_buffer_copy_type)(grpc_byte_buffer *bb);
-extern grpc_byte_buffer_copy_type grpc_byte_buffer_copy_import;
-#define grpc_byte_buffer_copy grpc_byte_buffer_copy_import
-typedef size_t(*grpc_byte_buffer_length_type)(grpc_byte_buffer *bb);
-extern grpc_byte_buffer_length_type grpc_byte_buffer_length_import;
-#define grpc_byte_buffer_length grpc_byte_buffer_length_import
-typedef void(*grpc_byte_buffer_destroy_type)(grpc_byte_buffer *byte_buffer);
-extern grpc_byte_buffer_destroy_type grpc_byte_buffer_destroy_import;
-#define grpc_byte_buffer_destroy grpc_byte_buffer_destroy_import
-typedef int(*grpc_byte_buffer_reader_init_type)(grpc_byte_buffer_reader *reader, grpc_byte_buffer *buffer);
-extern grpc_byte_buffer_reader_init_type grpc_byte_buffer_reader_init_import;
-#define grpc_byte_buffer_reader_init grpc_byte_buffer_reader_init_import
-typedef void(*grpc_byte_buffer_reader_destroy_type)(grpc_byte_buffer_reader *reader);
-extern grpc_byte_buffer_reader_destroy_type grpc_byte_buffer_reader_destroy_import;
-#define grpc_byte_buffer_reader_destroy grpc_byte_buffer_reader_destroy_import
-typedef int(*grpc_byte_buffer_reader_next_type)(grpc_byte_buffer_reader *reader, grpc_slice *slice);
-extern grpc_byte_buffer_reader_next_type grpc_byte_buffer_reader_next_import;
-#define grpc_byte_buffer_reader_next grpc_byte_buffer_reader_next_import
-typedef grpc_slice(*grpc_byte_buffer_reader_readall_type)(grpc_byte_buffer_reader *reader);
-extern grpc_byte_buffer_reader_readall_type grpc_byte_buffer_reader_readall_import;
-#define grpc_byte_buffer_reader_readall grpc_byte_buffer_reader_readall_import
-typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_from_reader_type)(grpc_byte_buffer_reader *reader);
-extern grpc_raw_byte_buffer_from_reader_type grpc_raw_byte_buffer_from_reader_import;
-#define grpc_raw_byte_buffer_from_reader grpc_raw_byte_buffer_from_reader_import
 typedef int(*census_initialize_type)(int features);
 extern census_initialize_type census_initialize_import;
 #define census_initialize census_initialize_import
@@ -161,10 +131,16 @@ extern census_resource_id_type census_resource_id_import;
 typedef void(*census_record_values_type)(census_context *context, census_value *values, size_t nvalues);
 extern census_record_values_type census_record_values_import;
 #define census_record_values census_record_values_import
+typedef int(*grpc_compression_algorithm_is_message_type)(grpc_compression_algorithm algorithm);
+extern grpc_compression_algorithm_is_message_type grpc_compression_algorithm_is_message_import;
+#define grpc_compression_algorithm_is_message grpc_compression_algorithm_is_message_import
+typedef int(*grpc_compression_algorithm_is_stream_type)(grpc_compression_algorithm algorithm);
+extern grpc_compression_algorithm_is_stream_type grpc_compression_algorithm_is_stream_import;
+#define grpc_compression_algorithm_is_stream grpc_compression_algorithm_is_stream_import
 typedef int(*grpc_compression_algorithm_parse_type)(grpc_slice value, grpc_compression_algorithm *algorithm);
 extern grpc_compression_algorithm_parse_type grpc_compression_algorithm_parse_import;
 #define grpc_compression_algorithm_parse grpc_compression_algorithm_parse_import
-typedef int(*grpc_compression_algorithm_name_type)(grpc_compression_algorithm algorithm, char **name);
+typedef int(*grpc_compression_algorithm_name_type)(grpc_compression_algorithm algorithm, const char **name);
 extern grpc_compression_algorithm_name_type grpc_compression_algorithm_name_import;
 #define grpc_compression_algorithm_name grpc_compression_algorithm_name_import
 typedef grpc_compression_algorithm(*grpc_compression_algorithm_for_level_type)(grpc_compression_level level, uint32_t accepted_encodings);
@@ -476,6 +452,36 @@ extern grpc_call_set_credentials_type grpc_call_set_credentials_import;
 typedef void(*grpc_server_credentials_set_auth_metadata_processor_type)(grpc_server_credentials *creds, grpc_auth_metadata_processor processor);
 extern grpc_server_credentials_set_auth_metadata_processor_type grpc_server_credentials_set_auth_metadata_processor_import;
 #define grpc_server_credentials_set_auth_metadata_processor grpc_server_credentials_set_auth_metadata_processor_import
+typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_create_type)(grpc_slice *slices, size_t nslices);
+extern grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
+#define grpc_raw_byte_buffer_create grpc_raw_byte_buffer_create_import
+typedef grpc_byte_buffer *(*grpc_raw_compressed_byte_buffer_create_type)(grpc_slice *slices, size_t nslices, grpc_compression_algorithm compression);
+extern grpc_raw_compressed_byte_buffer_create_type grpc_raw_compressed_byte_buffer_create_import;
+#define grpc_raw_compressed_byte_buffer_create grpc_raw_compressed_byte_buffer_create_import
+typedef grpc_byte_buffer *(*grpc_byte_buffer_copy_type)(grpc_byte_buffer *bb);
+extern grpc_byte_buffer_copy_type grpc_byte_buffer_copy_import;
+#define grpc_byte_buffer_copy grpc_byte_buffer_copy_import
+typedef size_t(*grpc_byte_buffer_length_type)(grpc_byte_buffer *bb);
+extern grpc_byte_buffer_length_type grpc_byte_buffer_length_import;
+#define grpc_byte_buffer_length grpc_byte_buffer_length_import
+typedef void(*grpc_byte_buffer_destroy_type)(grpc_byte_buffer *byte_buffer);
+extern grpc_byte_buffer_destroy_type grpc_byte_buffer_destroy_import;
+#define grpc_byte_buffer_destroy grpc_byte_buffer_destroy_import
+typedef int(*grpc_byte_buffer_reader_init_type)(grpc_byte_buffer_reader *reader, grpc_byte_buffer *buffer);
+extern grpc_byte_buffer_reader_init_type grpc_byte_buffer_reader_init_import;
+#define grpc_byte_buffer_reader_init grpc_byte_buffer_reader_init_import
+typedef void(*grpc_byte_buffer_reader_destroy_type)(grpc_byte_buffer_reader *reader);
+extern grpc_byte_buffer_reader_destroy_type grpc_byte_buffer_reader_destroy_import;
+#define grpc_byte_buffer_reader_destroy grpc_byte_buffer_reader_destroy_import
+typedef int(*grpc_byte_buffer_reader_next_type)(grpc_byte_buffer_reader *reader, grpc_slice *slice);
+extern grpc_byte_buffer_reader_next_type grpc_byte_buffer_reader_next_import;
+#define grpc_byte_buffer_reader_next grpc_byte_buffer_reader_next_import
+typedef grpc_slice(*grpc_byte_buffer_reader_readall_type)(grpc_byte_buffer_reader *reader);
+extern grpc_byte_buffer_reader_readall_type grpc_byte_buffer_reader_readall_import;
+#define grpc_byte_buffer_reader_readall grpc_byte_buffer_reader_readall_import
+typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_from_reader_type)(grpc_byte_buffer_reader *reader);
+extern grpc_raw_byte_buffer_from_reader_type grpc_raw_byte_buffer_from_reader_import;
+#define grpc_raw_byte_buffer_from_reader grpc_raw_byte_buffer_from_reader_import
 typedef grpc_slice(*grpc_slice_ref_type)(grpc_slice s);
 extern grpc_slice_ref_type grpc_slice_ref_import;
 #define grpc_slice_ref grpc_slice_ref_import
diff --git a/src/ruby/lib/grpc.rb b/src/ruby/lib/grpc.rb
index 98bfc0a0fa..37b0392072 100644
--- a/src/ruby/lib/grpc.rb
+++ b/src/ruby/lib/grpc.rb
@@ -24,6 +24,7 @@ require_relative 'grpc/generic/active_call'
 require_relative 'grpc/generic/client_stub'
 require_relative 'grpc/generic/service'
 require_relative 'grpc/generic/rpc_server'
+require_relative 'grpc/generic/interceptors'
 
 begin
   file = File.open(ssl_roots_path)
diff --git a/src/ruby/lib/grpc/generic/active_call.rb b/src/ruby/lib/grpc/generic/active_call.rb
index 10eb70b4a7..8c3aa284aa 100644
--- a/src/ruby/lib/grpc/generic/active_call.rb
+++ b/src/ruby/lib/grpc/generic/active_call.rb
@@ -154,6 +154,15 @@ module GRPC
       Operation.new(self)
     end
 
+    ##
+    # Returns a restricted view of this ActiveCall for use in interceptors
+    #
+    # @return [InterceptableView]
+    #
+    def interceptable
+      InterceptableView.new(self)
+    end
+
     def receive_and_check_status
       batch_result = @call.run_batch(RECV_STATUS_ON_CLIENT => nil)
       set_input_stream_done
@@ -515,15 +524,27 @@ module GRPC
     # This does not mean that must necessarily be one.  E.g, the replies
     # produced by gen_each_reply could ignore the received_msgs
     #
-    # @param gen_each_reply [Proc] generates the BiDi stream replies
-    def run_server_bidi(gen_each_reply)
-      bd = BidiCall.new(@call,
-                        @marshal,
-                        @unmarshal,
-                        metadata_received: @metadata_received,
-                        req_view: MultiReqView.new(self))
-
-      bd.run_on_server(gen_each_reply, proc { set_input_stream_done })
+    # @param mth [Proc] generates the BiDi stream replies
+    # @param interception_ctx [InterceptionContext]
+    #
+    def run_server_bidi(mth, interception_ctx)
+      view = multi_req_view
+      bidi_call = BidiCall.new(
+        @call,
+        @marshal,
+        @unmarshal,
+        metadata_received: @metadata_received,
+        req_view: view
+      )
+      requests = bidi_call.read_next_loop(proc { set_input_stream_done }, false)
+      interception_ctx.intercept!(
+        :bidi_streamer,
+        call: view,
+        method: mth,
+        requests: requests
+      ) do
+        bidi_call.run_on_server(mth, requests)
+      end
     end
 
     # Waits till an operation completes
@@ -645,5 +666,9 @@ module GRPC
     Operation = view_class(:cancel, :cancelled?, :deadline, :execute,
                            :metadata, :status, :start_call, :wait, :write_flag,
                            :write_flag=, :trailing_metadata)
+
+    # InterceptableView further limits access to an ActiveCall's methods
+    # for use in interceptors on the client, exposing only the deadline
+    InterceptableView = view_class(:deadline)
   end
 end
diff --git a/src/ruby/lib/grpc/generic/bidi_call.rb b/src/ruby/lib/grpc/generic/bidi_call.rb
index c2239d0178..3bdcc0062e 100644
--- a/src/ruby/lib/grpc/generic/bidi_call.rb
+++ b/src/ruby/lib/grpc/generic/bidi_call.rb
@@ -87,23 +87,32 @@ module GRPC
     # This does not mean that must necessarily be one.  E.g, the replies
     # produced by gen_each_reply could ignore the received_msgs
     #
-    # @param gen_each_reply [Proc] generates the BiDi stream replies.
-    # @param set_input_steam_done [Proc] call back to call when
-    #   the reads have been completely read through.
-    def run_on_server(gen_each_reply, set_input_stream_done)
+    # @param [Proc] gen_each_reply generates the BiDi stream replies.
+    # @param [Enumerable] requests The enumerable of requests to run
+    def run_on_server(gen_each_reply, requests)
+      replies = nil
+
       # Pass in the optional call object parameter if possible
       if gen_each_reply.arity == 1
-        replys = gen_each_reply.call(
-          read_loop(set_input_stream_done, is_client: false))
+        replies = gen_each_reply.call(requests)
       elsif gen_each_reply.arity == 2
-        replys = gen_each_reply.call(
-          read_loop(set_input_stream_done, is_client: false),
-          @req_view)
+        replies = gen_each_reply.call(requests, @req_view)
       else
         fail 'Illegal arity of reply generator'
       end
 
-      write_loop(replys, is_client: false)
+      write_loop(replies, is_client: false)
+    end
+
+    ##
+    # Read the next stream iteration
+    #
+    # @param [Proc] finalize_stream callback to call when the reads have been
+    #   completely read through.
+    # @param [Boolean] is_client If this is a client or server request
+    #
+    def read_next_loop(finalize_stream, is_client = false)
+      read_loop(finalize_stream, is_client: is_client)
     end
 
     private
diff --git a/src/ruby/lib/grpc/generic/client_stub.rb b/src/ruby/lib/grpc/generic/client_stub.rb
index 75a95a4e94..9a50f8a99d 100644
--- a/src/ruby/lib/grpc/generic/client_stub.rb
+++ b/src/ruby/lib/grpc/generic/client_stub.rb
@@ -89,17 +89,23 @@ module GRPC
     #     used within a gRPC server.
     # @param channel_args [Hash] the channel arguments. Note: this argument is
     #     ignored if the channel_override argument is provided.
+    # @param interceptors [Array<GRPC::ClientInterceptor>] An array of
+    #     GRPC::ClientInterceptor objects that will be used for
+    #     intercepting calls before they are executed
+    #     Interceptors are an EXPERIMENTAL API.
     def initialize(host, creds,
                    channel_override: nil,
                    timeout: nil,
                    propagate_mask: nil,
-                   channel_args: {})
+                   channel_args: {},
+                   interceptors: [])
       @ch = ClientStub.setup_channel(channel_override, host, creds,
                                      channel_args)
       alt_host = channel_args[Core::Channel::SSL_TARGET]
       @host = alt_host.nil? ? host : alt_host
       @propagate_mask = propagate_mask
       @timeout = timeout.nil? ? DEFAULT_TIMEOUT : timeout
+      @interceptors = InterceptorRegistry.new(interceptors)
     end
 
     # request_response sends a request to a GRPC server, and returns the
@@ -149,16 +155,29 @@ module GRPC
                           deadline: deadline,
                           parent: parent,
                           credentials: credentials)
-      return c.request_response(req, metadata: metadata) unless return_op
-
-      # return the operation view of the active_call; define #execute as a
-      # new method for this instance that invokes #request_response.
-      c.merge_metadata_to_send(metadata)
-      op = c.operation
-      op.define_singleton_method(:execute) do
-        c.request_response(req, metadata: metadata)
+      interception_context = @interceptors.build_context
+      intercept_args = {
+        method: method,
+        request: req,
+        call: c.interceptable,
+        metadata: metadata
+      }
+      if return_op
+        # return the operation view of the active_call; define #execute as a
+        # new method for this instance that invokes #request_response.
+        c.merge_metadata_to_send(metadata)
+        op = c.operation
+        op.define_singleton_method(:execute) do
+          interception_context.intercept!(:request_response, intercept_args) do
+            c.request_response(req, metadata: metadata)
+          end
+        end
+        op
+      else
+        interception_context.intercept!(:request_response, intercept_args) do
+          c.request_response(req, metadata: metadata)
+        end
       end
-      op
     end
 
     # client_streamer sends a stream of requests to a GRPC server, and
@@ -213,16 +232,29 @@ module GRPC
                           deadline: deadline,
                           parent: parent,
                           credentials: credentials)
-      return c.client_streamer(requests, metadata: metadata) unless return_op
-
-      # return the operation view of the active_call; define #execute as a
-      # new method for this instance that invokes #client_streamer.
-      c.merge_metadata_to_send(metadata)
-      op = c.operation
-      op.define_singleton_method(:execute) do
-        c.client_streamer(requests)
+      interception_context = @interceptors.build_context
+      intercept_args = {
+        method: method,
+        requests: requests,
+        call: c.interceptable,
+        metadata: metadata
+      }
+      if return_op
+        # return the operation view of the active_call; define #execute as a
+        # new method for this instance that invokes #client_streamer.
+        c.merge_metadata_to_send(metadata)
+        op = c.operation
+        op.define_singleton_method(:execute) do
+          interception_context.intercept!(:client_streamer, intercept_args) do
+            c.client_streamer(requests)
+          end
+        end
+        op
+      else
+        interception_context.intercept!(:client_streamer, intercept_args) do
+          c.client_streamer(requests, metadata: metadata)
+        end
       end
-      op
     end
 
     # server_streamer sends one request to the GRPC server, which yields a
@@ -292,16 +324,29 @@ module GRPC
                           deadline: deadline,
                           parent: parent,
                           credentials: credentials)
-      return c.server_streamer(req, metadata: metadata, &blk) unless return_op
-
-      # return the operation view of the active_call; define #execute
-      # as a new method for this instance that invokes #server_streamer
-      c.merge_metadata_to_send(metadata)
-      op = c.operation
-      op.define_singleton_method(:execute) do
-        c.server_streamer(req, &blk)
+      interception_context = @interceptors.build_context
+      intercept_args = {
+        method: method,
+        request: req,
+        call: c.interceptable,
+        metadata: metadata
+      }
+      if return_op
+        # return the operation view of the active_call; define #execute
+        # as a new method for this instance that invokes #server_streamer
+        c.merge_metadata_to_send(metadata)
+        op = c.operation
+        op.define_singleton_method(:execute) do
+          interception_context.intercept!(:server_streamer, intercept_args) do
+            c.server_streamer(req, &blk)
+          end
+        end
+        op
+      else
+        interception_context.intercept!(:server_streamer, intercept_args) do
+          c.server_streamer(req, metadata: metadata, &blk)
+        end
       end
-      op
     end
 
     # bidi_streamer sends a stream of requests to the GRPC server, and yields
@@ -405,17 +450,29 @@ module GRPC
                           deadline: deadline,
                           parent: parent,
                           credentials: credentials)
-      return c.bidi_streamer(requests, metadata: metadata,
-                             &blk) unless return_op
-
-      # return the operation view of the active_call; define #execute
-      # as a new method for this instance that invokes #bidi_streamer
-      c.merge_metadata_to_send(metadata)
-      op = c.operation
-      op.define_singleton_method(:execute) do
-        c.bidi_streamer(requests, &blk)
+      interception_context = @interceptors.build_context
+      intercept_args = {
+        method: method,
+        requests: requests,
+        call: c.interceptable,
+        metadata: metadata
+      }
+      if return_op
+        # return the operation view of the active_call; define #execute
+        # as a new method for this instance that invokes #bidi_streamer
+        c.merge_metadata_to_send(metadata)
+        op = c.operation
+        op.define_singleton_method(:execute) do
+          interception_context.intercept!(:bidi_streamer, intercept_args) do
+            c.bidi_streamer(requests, &blk)
+          end
+        end
+        op
+      else
+        interception_context.intercept!(:bidi_streamer, intercept_args) do
+          c.bidi_streamer(requests, metadata: metadata, &blk)
+        end
       end
-      op
     end
 
     private
diff --git a/src/ruby/lib/grpc/generic/interceptor_registry.rb b/src/ruby/lib/grpc/generic/interceptor_registry.rb
new file mode 100644
index 0000000000..b241eb9a86
--- /dev/null
+++ b/src/ruby/lib/grpc/generic/interceptor_registry.rb
@@ -0,0 +1,53 @@
+# 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.
+
+# GRPC contains the General RPC module.
+module GRPC
+  ##
+  # Represents a registry of added interceptors available for enumeration.
+  # The registry can be used for both server and client interceptors.
+  # This class is internal to gRPC and not meant for public usage.
+  #
+  class InterceptorRegistry
+    ##
+    # An error raised when an interceptor is attempted to be added
+    # that does not extend GRPC::Interceptor
+    #
+    class DescendantError < StandardError; end
+
+    ##
+    # Initialize the registry with an empty interceptor list
+    # This is an EXPERIMENTAL API.
+    #
+    def initialize(interceptors = [])
+      @interceptors = []
+      interceptors.each do |i|
+        base = GRPC::Interceptor
+        unless i.class.ancestors.include?(base)
+          fail DescendantError, "Interceptors must descend from #{base}"
+        end
+        @interceptors << i
+      end
+    end
+
+    ##
+    # Builds an interception context from this registry
+    #
+    # @return [InterceptionContext]
+    #
+    def build_context
+      InterceptionContext.new(@interceptors)
+    end
+  end
+end
diff --git a/src/ruby/lib/grpc/generic/interceptors.rb b/src/ruby/lib/grpc/generic/interceptors.rb
new file mode 100644
index 0000000000..73faec4b9c
--- /dev/null
+++ b/src/ruby/lib/grpc/generic/interceptors.rb
@@ -0,0 +1,186 @@
+# 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.
+require_relative 'interceptor_registry'
+
+# GRPC contains the General RPC module.
+module GRPC
+  ##
+  # Base class for interception in GRPC
+  #
+  class Interceptor
+    ##
+    # @param [Hash] options A hash of options that will be used
+    #   by the interceptor. This is an EXPERIMENTAL API.
+    #
+    def initialize(options = {})
+      @options = options || {}
+    end
+  end
+
+  ##
+  # ClientInterceptor allows for wrapping outbound gRPC client stub requests.
+  # This is an EXPERIMENTAL API.
+  #
+  class ClientInterceptor < Interceptor
+    ##
+    # Intercept a unary request response call
+    #
+    # @param [Object] request
+    # @param [GRPC::ActiveCall] call
+    # @param [Method] method
+    # @param [Hash] metadata
+    #
+    def request_response(request:, call:, method:, metadata:)
+      GRPC.logger.debug "Intercepting request response method #{method}" \
+        " for request #{request} with call #{call} and metadata: #{metadata}"
+      yield
+    end
+
+    ##
+    # Intercept a client streaming call
+    #
+    # @param [Enumerable] requests
+    # @param [GRPC::ActiveCall] call
+    # @param [Method] method
+    # @param [Hash] metadata
+    #
+    def client_streamer(requests:, call:, method:, metadata:)
+      GRPC.logger.debug "Intercepting client streamer method #{method}" \
+       " for requests #{requests} with call #{call} and metadata: #{metadata}"
+      yield
+    end
+
+    ##
+    # Intercept a server streaming call
+    #
+    # @param [Object] request
+    # @param [GRPC::ActiveCall] call
+    # @param [Method] method
+    # @param [Hash] metadata
+    #
+    def server_streamer(request:, call:, method:, metadata:)
+      GRPC.logger.debug "Intercepting server streamer method #{method}" \
+        " for request #{request} with call #{call} and metadata: #{metadata}"
+      yield
+    end
+
+    ##
+    # Intercept a BiDi streaming call
+    #
+    # @param [Enumerable] requests
+    # @param [GRPC::ActiveCall] call
+    # @param [Method] method
+    # @param [Hash] metadata
+    #
+    def bidi_streamer(requests:, call:, method:, metadata:)
+      GRPC.logger.debug "Intercepting bidi streamer method #{method}" \
+        " for requests #{requests} with call #{call} and metadata: #{metadata}"
+      yield
+    end
+  end
+
+  ##
+  # ServerInterceptor allows for wrapping gRPC server execution handling.
+  # This is an EXPERIMENTAL API.
+  #
+  class ServerInterceptor < Interceptor
+    ##
+    # Intercept a unary request response call.
+    #
+    # @param [Object] request
+    # @param [GRPC::ActiveCall::SingleReqView] call
+    # @param [Method] method
+    #
+    def request_response(request:, call:, method:)
+      GRPC.logger.debug "Intercepting request response method #{method}" \
+        " for request #{request} with call #{call}"
+      yield
+    end
+
+    ##
+    # Intercept a client streaming call
+    #
+    # @param [GRPC::ActiveCall::MultiReqView] call
+    # @param [Method] method
+    #
+    def client_streamer(call:, method:)
+      GRPC.logger.debug "Intercepting client streamer method #{method}" \
+        " with call #{call}"
+      yield
+    end
+
+    ##
+    # Intercept a server streaming call
+    #
+    # @param [Object] request
+    # @param [GRPC::ActiveCall::SingleReqView] call
+    # @param [Method] method
+    #
+    def server_streamer(request:, call:, method:)
+      GRPC.logger.debug "Intercepting server streamer method #{method}" \
+        " for request #{request} with call #{call}"
+      yield
+    end
+
+    ##
+    # Intercept a BiDi streaming call
+    #
+    # @param [Enumerable<Object>] requests
+    # @param [GRPC::ActiveCall::MultiReqView] call
+    # @param [Method] method
+    #
+    def bidi_streamer(requests:, call:, method:)
+      GRPC.logger.debug "Intercepting bidi streamer method #{method}" \
+        " for requests #{requests} with call #{call}"
+      yield
+    end
+  end
+
+  ##
+  # Represents the context in which an interceptor runs. Used to provide an
+  # injectable mechanism for handling interception. This is an EXPERIMENTAL API.
+  #
+  class InterceptionContext
+    ##
+    # @param [Array<GRPC::Interceptor>]
+    #
+    def initialize(interceptors = [])
+      @interceptors = interceptors.dup
+    end
+
+    ##
+    # Intercept the call and fire out to interceptors in a FIFO execution.
+    # This is an EXPERIMENTAL API.
+    #
+    # @param [Symbol] type The request type
+    # @param [Hash] args The arguments for the call
+    #
+    def intercept!(type, args = {})
+      return yield if @interceptors.none?
+
+      i = @interceptors.pop
+      return yield unless i
+
+      i.send(type, args) do
+        if @interceptors.any?
+          intercept!(type, args) do
+            yield
+          end
+        else
+          yield
+        end
+      end
+    end
+  end
+end
diff --git a/src/ruby/lib/grpc/generic/rpc_desc.rb b/src/ruby/lib/grpc/generic/rpc_desc.rb
index 6fb6c412fb..5fd1805aab 100644
--- a/src/ruby/lib/grpc/generic/rpc_desc.rb
+++ b/src/ruby/lib/grpc/generic/rpc_desc.rb
@@ -47,43 +47,85 @@ module GRPC
       proc { |o| unmarshal_class.method(unmarshal_method).call(o) }
     end
 
-    def handle_request_response(active_call, mth)
+    def handle_request_response(active_call, mth, inter_ctx)
       req = active_call.read_unary_request
-      resp = mth.call(req, active_call.single_req_view)
-      active_call.server_unary_response(
-        resp, trailing_metadata: active_call.output_metadata)
+      call = active_call.single_req_view
+
+      inter_ctx.intercept!(
+        :request_response,
+        method: mth,
+        call: call,
+        request: req
+      ) do
+        resp = mth.call(req, call)
+        active_call.server_unary_response(
+          resp,
+          trailing_metadata: active_call.output_metadata
+        )
+      end
     end
 
-    def handle_client_streamer(active_call,  mth)
-      resp = mth.call(active_call.multi_req_view)
-      active_call.server_unary_response(
-        resp, trailing_metadata: active_call.output_metadata)
+    def handle_client_streamer(active_call, mth, inter_ctx)
+      call = active_call.multi_req_view
+
+      inter_ctx.intercept!(
+        :client_streamer,
+        method: mth,
+        call: call
+      ) do
+        resp = mth.call(call)
+        active_call.server_unary_response(
+          resp,
+          trailing_metadata: active_call.output_metadata
+        )
+      end
     end
 
-    def handle_server_streamer(active_call, mth)
+    def handle_server_streamer(active_call, mth, inter_ctx)
       req = active_call.read_unary_request
-      replys = mth.call(req, active_call.single_req_view)
-      replys.each { |r| active_call.remote_send(r) }
-      send_status(active_call, OK, 'OK', active_call.output_metadata)
+      call = active_call.single_req_view
+
+      inter_ctx.intercept!(
+        :server_streamer,
+        method: mth,
+        call: call,
+        request: req
+      ) do
+        replies = mth.call(req, call)
+        replies.each { |r| active_call.remote_send(r) }
+        send_status(active_call, OK, 'OK', active_call.output_metadata)
+      end
     end
 
-    def handle_bidi_streamer(active_call, mth)
-      active_call.run_server_bidi(mth)
+    ##
+    # @param [GRPC::ActiveCall] active_call
+    # @param [Method] mth
+    # @param [Array<GRPC::InterceptionContext>] inter_ctx
+    #
+    def handle_bidi_streamer(active_call, mth, inter_ctx)
+      active_call.run_server_bidi(mth, inter_ctx)
       send_status(active_call, OK, 'OK', active_call.output_metadata)
     end
 
-    def run_server_method(active_call, mth)
+    ##
+    # @param [GRPC::ActiveCall] active_call The current active call object
+    #   for the request
+    # @param [Method] mth The current RPC method being called
+    # @param [GRPC::InterceptionContext] inter_ctx The interception context
+    #   being executed
+    #
+    def run_server_method(active_call, mth, inter_ctx = InterceptionContext.new)
       # While a server method is running, it might be cancelled, its deadline
       # might be reached, the handler could throw an unknown error, or a
       # well-behaved handler could throw a StatusError.
       if request_response?
-        handle_request_response(active_call, mth)
+        handle_request_response(active_call, mth, inter_ctx)
       elsif client_streamer?
-        handle_client_streamer(active_call, mth)
+        handle_client_streamer(active_call, mth, inter_ctx)
       elsif server_streamer?
-        handle_server_streamer(active_call, mth)
+        handle_server_streamer(active_call, mth, inter_ctx)
       else  # is a bidi_stream
-        handle_bidi_streamer(active_call, mth)
+        handle_bidi_streamer(active_call, mth, inter_ctx)
       end
     rescue BadStatus => e
       # this is raised by handlers that want GRPC to send an application error
diff --git a/src/ruby/lib/grpc/generic/rpc_server.rb b/src/ruby/lib/grpc/generic/rpc_server.rb
index 33b3cea1fc..d5fc11dc1c 100644
--- a/src/ruby/lib/grpc/generic/rpc_server.rb
+++ b/src/ruby/lib/grpc/generic/rpc_server.rb
@@ -196,11 +196,18 @@ module GRPC
     #
     # * server_args:
     # A server arguments hash to be passed down to the underlying core server
+    #
+    # * interceptors:
+    # Am array of GRPC::ServerInterceptor objects that will be used for
+    # intercepting server handlers to provide extra functionality.
+    # Interceptors are an EXPERIMENTAL API.
+    #
     def initialize(pool_size:DEFAULT_POOL_SIZE,
                    max_waiting_requests:DEFAULT_MAX_WAITING_REQUESTS,
                    poll_period:DEFAULT_POLL_PERIOD,
                    connect_md_proc:nil,
-                   server_args:{})
+                   server_args:{},
+                   interceptors:[])
       @connect_md_proc = RpcServer.setup_connect_md_proc(connect_md_proc)
       @max_waiting_requests = max_waiting_requests
       @poll_period = poll_period
@@ -212,6 +219,7 @@ module GRPC
       # :stopped. State transitions can only proceed in that order.
       @running_state = :not_started
       @server = Core::Server.new(server_args)
+      @interceptors = InterceptorRegistry.new(interceptors)
     end
 
     # stops a running server
@@ -374,7 +382,11 @@ module GRPC
             @pool.schedule(active_call) do |ac|
               c, mth = ac
               begin
-                rpc_descs[mth].run_server_method(c, rpc_handlers[mth])
+                rpc_descs[mth].run_server_method(
+                  c,
+                  rpc_handlers[mth],
+                  @interceptors.build_context
+                )
               rescue StandardError
                 c.send_status(GRPC::Core::StatusCodes::INTERNAL,
                               'Server handler failed')
@@ -382,7 +394,7 @@ module GRPC
             end
           end
         rescue Core::CallError, RuntimeError => e
-          # these might happen for various reasonse.  The correct behaviour of
+          # these might happen for various reasons.  The correct behavior of
           # the server is to log them and continue, if it's not shutting down.
           if running_state == :running
             GRPC.logger.warn("server call failed: #{e}")
diff --git a/src/ruby/lib/grpc/google_rpc_status_utils.rb b/src/ruby/lib/grpc/google_rpc_status_utils.rb
new file mode 100644
index 0000000000..fdadd6b76e
--- /dev/null
+++ b/src/ruby/lib/grpc/google_rpc_status_utils.rb
@@ -0,0 +1,28 @@
+# 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.
+
+require_relative './grpc'
+require 'google/rpc/status_pb'
+
+# GRPC contains the General RPC module.
+module GRPC
+  # GoogleRpcStatusUtils provides utilities to convert between a
+  # GRPC::Core::Status and a deserialized Google::Rpc::Status proto
+  class GoogleRpcStatusUtils
+    def self.extract_google_rpc_status(status)
+      fail ArgumentError, 'bad type' unless status.is_a? Struct::Status
+      Google::Rpc::Status.decode(status.metadata['grpc-status-details-bin'])
+    end
+  end
+end
diff --git a/src/ruby/pb/grpc/testing/duplicate/echo_duplicate_services_pb.rb b/src/ruby/pb/grpc/testing/duplicate/echo_duplicate_services_pb.rb
index 683370121e..ab50d9b3a5 100644
--- a/src/ruby/pb/grpc/testing/duplicate/echo_duplicate_services_pb.rb
+++ b/src/ruby/pb/grpc/testing/duplicate/echo_duplicate_services_pb.rb
@@ -34,6 +34,7 @@ module Grpc
           self.service_name = 'grpc.testing.duplicate.EchoTestService'
 
           rpc :Echo, Grpc::Testing::EchoRequest, Grpc::Testing::EchoResponse
+          rpc :ResponseStream, Grpc::Testing::EchoRequest, stream(Grpc::Testing::EchoResponse)
         end
 
         Stub = Service.rpc_stub_class
diff --git a/src/ruby/qps/proxy-worker.rb b/src/ruby/qps/proxy-worker.rb
index d7a9f114bd..488610ae74 100755
--- a/src/ruby/qps/proxy-worker.rb
+++ b/src/ruby/qps/proxy-worker.rb
@@ -41,7 +41,7 @@ class ProxyBenchmarkClientServiceImpl < Grpc::Testing::ProxyClientService::Servi
     @histogram = Histogram.new(@histres, @histmax)
     @start_time = Time.now
     # TODO(vjpai): Support multiple client channels by spawning off a PHP client per channel
-    command = "php " + File.expand_path(File.dirname(__FILE__)) + "/../../php/tests/qps/client.php " + @mytarget
+    command = "php -d extension=" + File.expand_path(File.dirname(__FILE__)) + "/../../php/ext/grpc/modules/grpc.so " + File.expand_path(File.dirname(__FILE__)) + "/../../php/tests/qps/client.php " + @mytarget
     puts "Starting command: " + command
     @php_pid = spawn(command)
   end
diff --git a/src/ruby/spec/channel_connection_spec.rb b/src/ruby/spec/channel_connection_spec.rb
index c76056606b..ce3e3b1c93 100644
--- a/src/ruby/spec/channel_connection_spec.rb
+++ b/src/ruby/spec/channel_connection_spec.rb
@@ -11,45 +11,12 @@
 # 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.
-
-require 'grpc'
+require 'spec_helper'
 require 'timeout'
 
 include Timeout
 include GRPC::Core
 
-# A test message
-class EchoMsg
-  def self.marshal(_o)
-    ''
-  end
-
-  def self.unmarshal(_o)
-    EchoMsg.new
-  end
-end
-
-# A test service with an echo implementation.
-class EchoService
-  include GRPC::GenericService
-  rpc :an_rpc, EchoMsg, EchoMsg
-  attr_reader :received_md
-
-  def initialize(**kw)
-    @trailing_metadata = kw
-    @received_md = []
-  end
-
-  def an_rpc(req, call)
-    GRPC.logger.info('echo service received a request')
-    call.output_metadata.update(@trailing_metadata)
-    @received_md << call.metadata unless call.metadata.nil?
-    req
-  end
-end
-
-EchoStub = EchoService.rpc_stub_class
-
 def start_server(port = 0)
   @srv = GRPC::RpcServer.new(pool_size: 1)
   server_port = @srv.add_http2_port("localhost:#{port}", :this_port_is_insecure)
diff --git a/src/ruby/spec/client_server_spec.rb b/src/ruby/spec/client_server_spec.rb
index 1a9b47e2c3..adab8c9d14 100644
--- a/src/ruby/spec/client_server_spec.rb
+++ b/src/ruby/spec/client_server_spec.rb
@@ -29,14 +29,18 @@ shared_context 'setup: tags' do
     expect(recvd_rpc).to_not eq nil
     server_call = recvd_rpc.call
     ops = { CallOps::SEND_INITIAL_METADATA => metadata }
-    svr_batch = server_call.run_batch(ops)
-    expect(svr_batch.send_metadata).to be true
+    server_batch = server_call.run_batch(ops)
+    expect(server_batch.send_metadata).to be true
     server_call
   end
 
   def new_client_call
     @ch.create_call(nil, nil, '/method', nil, deadline)
   end
+
+  def ok_status
+    Struct::Status.new(StatusCodes::OK, 'OK')
+  end
 end
 
 shared_examples 'basic GRPC message delivery is OK' do
@@ -70,19 +74,32 @@ shared_examples 'basic GRPC message delivery is OK' do
 
     client_ops = {
       CallOps::SEND_INITIAL_METADATA => {},
-      CallOps::SEND_MESSAGE => sent_message
+      CallOps::SEND_MESSAGE => sent_message,
+      CallOps::SEND_CLOSE_FROM_CLIENT => nil
     }
-    batch_result = call.run_batch(client_ops)
-    expect(batch_result.send_metadata).to be true
-    expect(batch_result.send_message).to be true
+    client_batch = call.run_batch(client_ops)
+    expect(client_batch.send_metadata).to be true
+    expect(client_batch.send_message).to be true
+    expect(client_batch.send_close).to be true
 
     # confirm the server can read the inbound message
     server_thread.join
     server_ops = {
-      CallOps::RECV_MESSAGE => nil
+      CallOps::RECV_MESSAGE => nil,
+      CallOps::RECV_CLOSE_ON_SERVER => nil,
+      CallOps::SEND_STATUS_FROM_SERVER => ok_status
     }
-    svr_batch = server_call.run_batch(server_ops)
-    expect(svr_batch.message).to eq(sent_message)
+    server_batch = server_call.run_batch(server_ops)
+    expect(server_batch.message).to eq(sent_message)
+    expect(server_batch.send_close).to be true
+    expect(server_batch.send_status).to be true
+
+    # finish the call
+    final_client_batch = call.run_batch(
+      CallOps::RECV_INITIAL_METADATA => nil,
+      CallOps::RECV_STATUS_ON_CLIENT => nil)
+    expect(final_client_batch.metadata).to eq({})
+    expect(final_client_batch.status.code).to eq(0)
   end
 
   it 'responses written by servers are received by the client' do
@@ -95,21 +112,36 @@ shared_examples 'basic GRPC message delivery is OK' do
 
     client_ops = {
       CallOps::SEND_INITIAL_METADATA => {},
-      CallOps::SEND_MESSAGE => sent_message
+      CallOps::SEND_MESSAGE => sent_message,
+      CallOps::SEND_CLOSE_FROM_CLIENT => nil
     }
-    batch_result = call.run_batch(client_ops)
-    expect(batch_result.send_metadata).to be true
-    expect(batch_result.send_message).to be true
+    client_batch = call.run_batch(client_ops)
+    expect(client_batch.send_metadata).to be true
+    expect(client_batch.send_message).to be true
+    expect(client_batch.send_close).to be true
 
     # confirm the server can read the inbound message
     server_thread.join
     server_ops = {
       CallOps::RECV_MESSAGE => nil,
-      CallOps::SEND_MESSAGE => reply_text
+      CallOps::RECV_CLOSE_ON_SERVER => nil,
+      CallOps::SEND_MESSAGE => reply_text,
+      CallOps::SEND_STATUS_FROM_SERVER => ok_status
     }
-    svr_batch = server_call.run_batch(server_ops)
-    expect(svr_batch.message).to eq(sent_message)
-    expect(svr_batch.send_message).to be true
+    server_batch = server_call.run_batch(server_ops)
+    expect(server_batch.message).to eq(sent_message)
+    expect(server_batch.send_close).to be true
+    expect(server_batch.send_message).to be true
+    expect(server_batch.send_status).to be true
+
+    # finish the call
+    final_client_batch = call.run_batch(
+      CallOps::RECV_INITIAL_METADATA => nil,
+      CallOps::RECV_MESSAGE => nil,
+      CallOps::RECV_STATUS_ON_CLIENT => nil)
+    expect(final_client_batch.metadata).to eq({})
+    expect(final_client_batch.message).to eq(reply_text)
+    expect(final_client_batch.status.code).to eq(0)
   end
 
   it 'compressed messages can be sent and received' do
@@ -125,30 +157,37 @@ shared_examples 'basic GRPC message delivery is OK' do
 
     client_ops = {
       CallOps::SEND_INITIAL_METADATA => md,
-      CallOps::SEND_MESSAGE => long_request_str
+      CallOps::SEND_MESSAGE => long_request_str,
+      CallOps::SEND_CLOSE_FROM_CLIENT => nil
     }
-    batch_result = call.run_batch(client_ops)
-    expect(batch_result.send_metadata).to be true
-    expect(batch_result.send_message).to be true
+    client_batch = call.run_batch(client_ops)
+    expect(client_batch.send_metadata).to be true
+    expect(client_batch.send_message).to be true
+    expect(client_batch.send_close).to be true
 
     # confirm the server can read the inbound message
     server_thread.join
     server_ops = {
       CallOps::RECV_MESSAGE => nil,
-      CallOps::SEND_MESSAGE => long_response_str
+      CallOps::RECV_CLOSE_ON_SERVER => nil,
+      CallOps::SEND_MESSAGE => long_response_str,
+      CallOps::SEND_STATUS_FROM_SERVER => ok_status
     }
-    svr_batch = server_call.run_batch(server_ops)
-    expect(svr_batch.message).to eq(long_request_str)
-    expect(svr_batch.send_message).to be true
+    server_batch = server_call.run_batch(server_ops)
+    expect(server_batch.message).to eq(long_request_str)
+    expect(server_batch.send_close).to be true
+    expect(server_batch.send_message).to be true
+    expect(server_batch.send_status).to be true
 
     client_ops = {
-      CallOps::SEND_CLOSE_FROM_CLIENT => nil,
       CallOps::RECV_INITIAL_METADATA => nil,
-      CallOps::RECV_MESSAGE => nil
+      CallOps::RECV_MESSAGE => nil,
+      CallOps::RECV_STATUS_ON_CLIENT => nil
     }
-    batch_result = call.run_batch(client_ops)
-    expect(batch_result.send_close).to be true
-    expect(batch_result.message).to eq long_response_str
+    final_client_batch = call.run_batch(client_ops)
+    expect(final_client_batch.metadata).to eq({})
+    expect(final_client_batch.message).to eq long_response_str
+    expect(final_client_batch.status.code).to eq(0)
   end
 
   it 'servers can ignore a client write and send a status' do
@@ -161,11 +200,13 @@ shared_examples 'basic GRPC message delivery is OK' do
 
     client_ops = {
       CallOps::SEND_INITIAL_METADATA => {},
-      CallOps::SEND_MESSAGE => sent_message
+      CallOps::SEND_MESSAGE => sent_message,
+      CallOps::SEND_CLOSE_FROM_CLIENT => nil
     }
-    batch_result = call.run_batch(client_ops)
-    expect(batch_result.send_metadata).to be true
-    expect(batch_result.send_message).to be true
+    client_batch = call.run_batch(client_ops)
+    expect(client_batch.send_metadata).to be true
+    expect(client_batch.send_message).to be true
+    expect(client_batch.send_close).to be true
 
     # confirm the server can read the inbound message
     the_status = Struct::Status.new(StatusCodes::OK, 'OK')
@@ -173,9 +214,15 @@ shared_examples 'basic GRPC message delivery is OK' do
     server_ops = {
       CallOps::SEND_STATUS_FROM_SERVER => the_status
     }
-    svr_batch = server_call.run_batch(server_ops)
-    expect(svr_batch.message).to eq nil
-    expect(svr_batch.send_status).to be true
+    server_batch = server_call.run_batch(server_ops)
+    expect(server_batch.message).to eq nil
+    expect(server_batch.send_status).to be true
+
+    final_client_batch = call.run_batch(
+      CallOps::RECV_INITIAL_METADATA => nil,
+      CallOps::RECV_STATUS_ON_CLIENT => nil)
+    expect(final_client_batch.metadata).to eq({})
+    expect(final_client_batch.status.code).to eq(0)
   end
 
   it 'completes calls by sending status to client and server' do
@@ -190,9 +237,9 @@ shared_examples 'basic GRPC message delivery is OK' do
       CallOps::SEND_INITIAL_METADATA => {},
       CallOps::SEND_MESSAGE => sent_message
     }
-    batch_result = call.run_batch(client_ops)
-    expect(batch_result.send_metadata).to be true
-    expect(batch_result.send_message).to be true
+    client_batch = call.run_batch(client_ops)
+    expect(client_batch.send_metadata).to be true
+    expect(client_batch.send_message).to be true
 
     # confirm the server can read the inbound message and respond
     the_status = Struct::Status.new(StatusCodes::OK, 'OK', {})
@@ -202,10 +249,10 @@ shared_examples 'basic GRPC message delivery is OK' do
       CallOps::SEND_MESSAGE => reply_text,
       CallOps::SEND_STATUS_FROM_SERVER => the_status
     }
-    svr_batch = server_call.run_batch(server_ops)
-    expect(svr_batch.message).to eq sent_message
-    expect(svr_batch.send_status).to be true
-    expect(svr_batch.send_message).to be true
+    server_batch = server_call.run_batch(server_ops)
+    expect(server_batch.message).to eq sent_message
+    expect(server_batch.send_status).to be true
+    expect(server_batch.send_message).to be true
 
     # confirm the client can receive the server response and status.
     client_ops = {
@@ -214,17 +261,17 @@ shared_examples 'basic GRPC message delivery is OK' do
       CallOps::RECV_MESSAGE => nil,
       CallOps::RECV_STATUS_ON_CLIENT => nil
     }
-    batch_result = call.run_batch(client_ops)
-    expect(batch_result.send_close).to be true
-    expect(batch_result.message).to eq reply_text
-    expect(batch_result.status).to eq the_status
+    final_client_batch = call.run_batch(client_ops)
+    expect(final_client_batch.send_close).to be true
+    expect(final_client_batch.message).to eq reply_text
+    expect(final_client_batch.status).to eq the_status
 
     # confirm the server can receive the client close.
     server_ops = {
       CallOps::RECV_CLOSE_ON_SERVER => nil
     }
-    svr_batch = server_call.run_batch(server_ops)
-    expect(svr_batch.send_close).to be true
+    final_server_batch = server_call.run_batch(server_ops)
+    expect(final_server_batch.send_close).to be true
   end
 
   def client_cancel_test(cancel_proc, expected_code,
@@ -240,9 +287,9 @@ shared_examples 'basic GRPC message delivery is OK' do
       CallOps::SEND_INITIAL_METADATA => {},
       CallOps::RECV_INITIAL_METADATA => nil
     }
-    batch_result = call.run_batch(client_ops)
-    expect(batch_result.send_metadata).to be true
-    expect(batch_result.metadata).to eq({})
+    client_batch = call.run_batch(client_ops)
+    expect(client_batch.send_metadata).to be true
+    expect(client_batch.metadata).to eq({})
 
     cancel_proc.call(call)
 
@@ -250,16 +297,16 @@ shared_examples 'basic GRPC message delivery is OK' do
     server_ops = {
       CallOps::RECV_CLOSE_ON_SERVER => nil
     }
-    svr_batch = server_call.run_batch(server_ops)
-    expect(svr_batch.send_close).to be true
+    server_batch = server_call.run_batch(server_ops)
+    expect(server_batch.send_close).to be true
 
     client_ops = {
       CallOps::RECV_STATUS_ON_CLIENT => {}
     }
-    batch_result = call.run_batch(client_ops)
+    client_batch = call.run_batch(client_ops)
 
-    expect(batch_result.status.code).to be expected_code
-    expect(batch_result.status.details).to eq expected_details
+    expect(client_batch.status.code).to be expected_code
+    expect(client_batch.status.details).to eq expected_details
   end
 
   it 'clients can cancel a call on the server' do
@@ -325,10 +372,11 @@ shared_examples 'GRPC metadata delivery works OK' do
 
         call = new_client_call
         client_ops = {
-          CallOps::SEND_INITIAL_METADATA => md
+          CallOps::SEND_INITIAL_METADATA => md,
+          CallOps::SEND_CLOSE_FROM_CLIENT => nil
         }
-        batch_result = call.run_batch(client_ops)
-        expect(batch_result.send_metadata).to be true
+        client_batch = call.run_batch(client_ops)
+        expect(client_batch.send_metadata).to be true
 
         # confirm the server can receive the client metadata
         rcv_thread.join
@@ -336,6 +384,21 @@ shared_examples 'GRPC metadata delivery works OK' do
         recvd_md = recvd_rpc.metadata
         replace_symbols = Hash[md.each_pair.collect { |x, y| [x.to_s, y] }]
         expect(recvd_md).to eq(recvd_md.merge(replace_symbols))
+
+        # finish the call
+        final_server_batch = recvd_rpc.call.run_batch(
+          CallOps::RECV_CLOSE_ON_SERVER => nil,
+          CallOps::SEND_INITIAL_METADATA => nil,
+          CallOps::SEND_STATUS_FROM_SERVER => ok_status)
+        expect(final_server_batch.send_close).to be(true)
+        expect(final_server_batch.send_metadata).to be(true)
+        expect(final_server_batch.send_status).to be(true)
+
+        final_client_batch = call.run_batch(
+          CallOps::RECV_INITIAL_METADATA => nil,
+          CallOps::RECV_STATUS_ON_CLIENT => nil)
+        expect(final_client_batch.metadata).to eq({})
+        expect(final_client_batch.status.code).to eq(0)
       end
     end
   end
@@ -381,6 +444,9 @@ shared_examples 'GRPC metadata delivery works OK' do
           recvd_rpc.call.run_batch(server_ops)
         end
         expect(&blk).to raise_error
+
+        # cancel the call so the server can shut down immediately
+        call.cancel
       end
     end
 
@@ -394,25 +460,37 @@ shared_examples 'GRPC metadata delivery works OK' do
       # client signals that it's done sending metadata to allow server to
       # respond
       client_ops = {
-        CallOps::SEND_INITIAL_METADATA => nil
+        CallOps::SEND_INITIAL_METADATA => nil,
+        CallOps::SEND_CLOSE_FROM_CLIENT => nil
       }
-      call.run_batch(client_ops)
+      client_batch = call.run_batch(client_ops)
+      expect(client_batch.send_metadata).to be true
+      expect(client_batch.send_close).to be true
 
       # server gets the invocation but sends no metadata back
       rcv_thread.join
       expect(recvd_rpc).to_not eq nil
       server_call = recvd_rpc.call
       server_ops = {
-        CallOps::SEND_INITIAL_METADATA => nil
+        # receive close and send status to finish the call
+        CallOps::RECV_CLOSE_ON_SERVER => nil,
+        CallOps::SEND_INITIAL_METADATA => nil,
+        CallOps::SEND_STATUS_FROM_SERVER => ok_status
       }
-      server_call.run_batch(server_ops)
+      srv_batch = server_call.run_batch(server_ops)
+      expect(srv_batch.send_close).to be true
+      expect(srv_batch.send_metadata).to be true
+      expect(srv_batch.send_status).to be true
 
       # client receives nothing as expected
       client_ops = {
-        CallOps::RECV_INITIAL_METADATA => nil
+        CallOps::RECV_INITIAL_METADATA => nil,
+        # receive status to finish the call
+        CallOps::RECV_STATUS_ON_CLIENT => nil
       }
-      batch_result = call.run_batch(client_ops)
-      expect(batch_result.metadata).to eq({})
+      final_client_batch = call.run_batch(client_ops)
+      expect(final_client_batch.metadata).to eq({})
+      expect(final_client_batch.status.code).to eq(0)
     end
 
     it 'sends all the pairs when keys and values are valid' do
@@ -426,26 +504,36 @@ shared_examples 'GRPC metadata delivery works OK' do
         # client signals that it's done sending metadata to allow server to
         # respond
         client_ops = {
-          CallOps::SEND_INITIAL_METADATA => nil
+          CallOps::SEND_INITIAL_METADATA => nil,
+          CallOps::SEND_CLOSE_FROM_CLIENT => nil
         }
-        call.run_batch(client_ops)
+        client_batch = call.run_batch(client_ops)
+        expect(client_batch.send_metadata).to be true
+        expect(client_batch.send_close).to be true
 
         # server gets the invocation but sends no metadata back
         rcv_thread.join
         expect(recvd_rpc).to_not eq nil
         server_call = recvd_rpc.call
         server_ops = {
-          CallOps::SEND_INITIAL_METADATA => md
+          CallOps::RECV_CLOSE_ON_SERVER => nil,
+          CallOps::SEND_INITIAL_METADATA => md,
+          CallOps::SEND_STATUS_FROM_SERVER => ok_status
         }
-        server_call.run_batch(server_ops)
+        srv_batch = server_call.run_batch(server_ops)
+        expect(srv_batch.send_close).to be true
+        expect(srv_batch.send_metadata).to be true
+        expect(srv_batch.send_status).to be true
 
         # client receives nothing as expected
         client_ops = {
-          CallOps::RECV_INITIAL_METADATA => nil
+          CallOps::RECV_INITIAL_METADATA => nil,
+          CallOps::RECV_STATUS_ON_CLIENT => nil
         }
-        batch_result = call.run_batch(client_ops)
+        final_client_batch = call.run_batch(client_ops)
         replace_symbols = Hash[md.each_pair.collect { |x, y| [x.to_s, y] }]
-        expect(batch_result.metadata).to eq(replace_symbols)
+        expect(final_client_batch.metadata).to eq(replace_symbols)
+        expect(final_client_batch.status.code).to eq(0)
       end
     end
   end
@@ -510,8 +598,7 @@ describe 'the secure http client/server' do
 
     initial_md_key = 'k2'
     initial_md_val = 'v2'
-    initial_md = {}
-    initial_md[initial_md_key] = initial_md_val
+    initial_md = { initial_md_key => initial_md_val }
     expected_md = creds_update_md.clone
     fail 'bad test param' unless expected_md[initial_md_key].nil?
     expected_md[initial_md_key] = initial_md_val
@@ -523,11 +610,12 @@ describe 'the secure http client/server' do
 
     call = new_client_call
     call.set_credentials! call_creds
-    client_ops = {
-      CallOps::SEND_INITIAL_METADATA => initial_md
-    }
-    batch_result = call.run_batch(client_ops)
-    expect(batch_result.send_metadata).to be true
+
+    client_batch = call.run_batch(
+      CallOps::SEND_INITIAL_METADATA => initial_md,
+      CallOps::SEND_CLOSE_FROM_CLIENT => nil)
+    expect(client_batch.send_metadata).to be true
+    expect(client_batch.send_close).to be true
 
     # confirm the server can receive the client metadata
     rcv_thread.join
@@ -535,6 +623,24 @@ describe 'the secure http client/server' do
     recvd_md = recvd_rpc.metadata
     replace_symbols = Hash[expected_md.each_pair.collect { |x, y| [x.to_s, y] }]
     expect(recvd_md).to eq(recvd_md.merge(replace_symbols))
+
+    credentials_update_test_finish_call(call, recvd_rpc.call)
+  end
+
+  def credentials_update_test_finish_call(client_call, server_call)
+    final_server_batch = server_call.run_batch(
+      CallOps::RECV_CLOSE_ON_SERVER => nil,
+      CallOps::SEND_INITIAL_METADATA => nil,
+      CallOps::SEND_STATUS_FROM_SERVER => ok_status)
+    expect(final_server_batch.send_close).to be(true)
+    expect(final_server_batch.send_metadata).to be(true)
+    expect(final_server_batch.send_status).to be(true)
+
+    final_client_batch = client_call.run_batch(
+      CallOps::RECV_INITIAL_METADATA => nil,
+      CallOps::RECV_STATUS_ON_CLIENT => nil)
+    expect(final_client_batch.metadata).to eq({})
+    expect(final_client_batch.status.code).to eq(0)
   end
 
   it 'modifies metadata with CallCredentials' do
diff --git a/src/ruby/spec/generic/active_call_spec.rb b/src/ruby/spec/generic/active_call_spec.rb
index ec0c294174..120acc35af 100644
--- a/src/ruby/spec/generic/active_call_spec.rb
+++ b/src/ruby/spec/generic/active_call_spec.rb
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-require 'grpc'
+require 'spec_helper'
 
 include GRPC::Core::StatusCodes
 
@@ -22,6 +22,21 @@ describe GRPC::ActiveCall do
   CallOps = GRPC::Core::CallOps
   WriteFlags = GRPC::Core::WriteFlags
 
+  def ok_status
+    Struct::Status.new(OK, 'OK')
+  end
+
+  def send_and_receive_close_and_status(client_call, server_call)
+    client_call.run_batch(CallOps::SEND_CLOSE_FROM_CLIENT => nil)
+    server_call.run_batch(CallOps::RECV_CLOSE_ON_SERVER => nil,
+                          CallOps::SEND_STATUS_FROM_SERVER => ok_status)
+    client_call.run_batch(CallOps::RECV_STATUS_ON_CLIENT => nil)
+  end
+
+  def inner_call_of_active_call(active_call)
+    active_call.instance_variable_get(:@call)
+  end
+
   before(:each) do
     @pass_through = proc { |x| x }
     host = '0.0.0.0:0'
@@ -67,16 +82,26 @@ describe GRPC::ActiveCall do
         end
       end
     end
+
+    describe '#interceptable' do
+      it 'exposes a fixed subset of the ActiveCall.methods' do
+        want = %w(deadline)
+        v = @client_call.interceptable
+        want.each do |w|
+          expect(v.methods.include?(w))
+        end
+      end
+    end
   end
 
   describe '#remote_send' do
-    it 'allows a client to send a payload to the server' do
+    it 'allows a client to send a payload to the server', test: true do
       call = make_test_call
       ActiveCall.client_invoke(call)
-      @client_call = ActiveCall.new(call, @pass_through,
-                                    @pass_through, deadline)
+      client_call = ActiveCall.new(call, @pass_through,
+                                   @pass_through, deadline)
       msg = 'message is a string'
-      @client_call.remote_send(msg)
+      client_call.remote_send(msg)
 
       # check that server rpc new was received
       recvd_rpc = @server.request_call
@@ -86,8 +111,13 @@ describe GRPC::ActiveCall do
       # Accept the call, and verify that the server reads the response ok.
       server_call = ActiveCall.new(recvd_call, @pass_through,
                                    @pass_through, deadline,
-                                   metadata_received: true)
+                                   metadata_received: true,
+                                   started: false)
       expect(server_call.remote_read).to eq(msg)
+      # finish the call
+      server_call.send_initial_metadata
+      call.run_batch(CallOps::RECV_INITIAL_METADATA => nil)
+      send_and_receive_close_and_status(call, recvd_call)
     end
 
     it 'marshals the payload using the marshal func' do
@@ -109,6 +139,9 @@ describe GRPC::ActiveCall do
                                    @pass_through, deadline,
                                    metadata_received: true)
       expect(server_call.remote_read).to eq('marshalled:' + msg)
+      # finish the call
+      call.run_batch(CallOps::RECV_INITIAL_METADATA => nil)
+      send_and_receive_close_and_status(call, recvd_call)
     end
 
     TEST_WRITE_FLAGS = [WriteFlags::BUFFER_HINT, WriteFlags::NO_COMPRESS]
@@ -136,6 +169,9 @@ describe GRPC::ActiveCall do
                                      @pass_through, deadline,
                                      metadata_received: true)
         expect(server_call.remote_read).to eq('marshalled:' + msg)
+        # finish the call
+        server_call.send_status(OK, '', true)
+        client_call.receive_and_check_status
       end
     end
   end
@@ -177,7 +213,6 @@ describe GRPC::ActiveCall do
                                     @pass_through,
                                     @pass_through,
                                     deadline)
-
       expect(@client_call.metadata_sent).to eql(true)
       expect(call).to(
         receive(:run_batch).with(hash_including(
@@ -291,6 +326,10 @@ describe GRPC::ActiveCall do
       expect(recvd_rpc.metadata).to_not be_nil
       expect(recvd_rpc.metadata['k1']).to eq('v1')
       expect(recvd_rpc.metadata['k2']).to eq('v2')
+      # finish the call
+      recvd_call.run_batch(CallOps::SEND_INITIAL_METADATA => {})
+      call.run_batch(CallOps::RECV_INITIAL_METADATA => nil)
+      send_and_receive_close_and_status(call, recvd_call)
     end
   end
 
@@ -324,6 +363,8 @@ describe GRPC::ActiveCall do
       server_call = expect_server_to_receive(msg)
       server_call.remote_send('server_response')
       expect(client_call.remote_read).to eq('server_response')
+      send_and_receive_close_and_status(
+        call, inner_call_of_active_call(server_call))
     end
 
     it 'saves no metadata when the server adds no metadata' do
@@ -338,6 +379,8 @@ describe GRPC::ActiveCall do
       expect(client_call.metadata).to be_nil
       client_call.remote_read
       expect(client_call.metadata).to eq({})
+      send_and_receive_close_and_status(
+        call, inner_call_of_active_call(server_call))
     end
 
     it 'saves metadata add by the server' do
@@ -353,6 +396,8 @@ describe GRPC::ActiveCall do
       client_call.remote_read
       expected = { 'k1' => 'v1', 'k2' => 'v2' }
       expect(client_call.metadata).to eq(expected)
+      send_and_receive_close_and_status(
+        call, inner_call_of_active_call(server_call))
     end
 
     it 'get a status from server when nothing else sent from server' do
@@ -409,6 +454,8 @@ describe GRPC::ActiveCall do
       server_call = expect_server_to_receive(msg)
       server_call.remote_send('server_response')
       expect(client_call.remote_read).to eq('unmarshalled:server_response')
+      send_and_receive_close_and_status(
+        call, inner_call_of_active_call(server_call))
     end
   end
 
@@ -418,9 +465,11 @@ describe GRPC::ActiveCall do
       client_call = ActiveCall.new(call, @pass_through,
                                    @pass_through, deadline)
       expect(client_call.each_remote_read).to be_a(Enumerator)
+      # finish the call
+      client_call.cancel
     end
 
-    it 'the returns an enumerator that can read n responses' do
+    it 'the returned enumerator can read n responses' do
       call = make_test_call
       ActiveCall.client_invoke(call)
       client_call = ActiveCall.new(call, @pass_through,
@@ -435,6 +484,8 @@ describe GRPC::ActiveCall do
         server_call.remote_send(reply)
         expect(e.next).to eq(reply)
       end
+      send_and_receive_close_and_status(
+        call, inner_call_of_active_call(server_call))
     end
 
     it 'the returns an enumerator that stops after an OK Status' do
@@ -453,7 +504,7 @@ describe GRPC::ActiveCall do
         server_call.remote_send(reply)
         expect(e.next).to eq(reply)
       end
-      server_call.send_status(OK, 'OK')
+      server_call.send_status(OK, 'OK', true)
       expect { e.next }.to raise_error(StopIteration)
     end
   end
@@ -568,9 +619,11 @@ describe GRPC::ActiveCall do
         msgs
       end
 
+      int_ctx = GRPC::InterceptionContext.new
+
       @server_thread = Thread.new do
         @server_call.run_server_bidi(
-          fake_gen_each_reply_with_no_call_param)
+          fake_gen_each_reply_with_no_call_param, int_ctx)
         @server_call.send_status(@server_status)
       end
     end
@@ -583,10 +636,11 @@ describe GRPC::ActiveCall do
         call_param.send_initial_metadata
         msgs
       end
+      int_ctx = GRPC::InterceptionContext.new
 
       @server_thread = Thread.new do
         @server_call.run_server_bidi(
-          fake_gen_each_reply_with_call_param)
+          fake_gen_each_reply_with_call_param, int_ctx)
         @server_call.send_status(@server_status)
       end
     end
diff --git a/src/ruby/spec/generic/client_interceptors_spec.rb b/src/ruby/spec/generic/client_interceptors_spec.rb
new file mode 100644
index 0000000000..f292715e4d
--- /dev/null
+++ b/src/ruby/spec/generic/client_interceptors_spec.rb
@@ -0,0 +1,153 @@
+# 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.
+require 'spec_helper'
+
+describe 'Client Interceptors' do
+  let(:interceptor) { TestClientInterceptor.new }
+  let(:interceptors_opts) { { interceptors: [interceptor] } }
+  let(:request) { EchoMsg.new }
+  let(:service) { EchoService }
+
+  before(:each) do
+    build_rpc_server
+  end
+
+  context 'when a client interceptor is added' do
+    context 'with a request/response call' do
+      it 'should be called', server: true do
+        expect(interceptor).to receive(:request_response)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub, opts: interceptors_opts)
+          expect_any_instance_of(GRPC::ActiveCall).to receive(:request_response)
+            .once.and_call_original
+          expect(stub.an_rpc(request)).to be_a(EchoMsg)
+        end
+      end
+
+      it 'can modify outgoing metadata', server: true do
+        expect(interceptor).to receive(:request_response)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub, opts: interceptors_opts)
+          expect_any_instance_of(GRPC::ActiveCall).to receive(:request_response)
+            .with(request, metadata: { 'foo' => 'bar_from_request_response' })
+            .once.and_call_original
+          expect(stub.an_rpc(request)).to be_a(EchoMsg)
+        end
+      end
+    end
+
+    context 'with a client streaming call' do
+      it 'should be called', server: true do
+        expect(interceptor).to receive(:client_streamer)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub, opts: interceptors_opts)
+          expect_any_instance_of(GRPC::ActiveCall).to receive(:client_streamer)
+            .once.and_call_original
+          requests = [EchoMsg.new, EchoMsg.new]
+          expect(stub.a_client_streaming_rpc(requests)).to be_a(EchoMsg)
+        end
+      end
+
+      it 'can modify outgoing metadata', server: true do
+        expect(interceptor).to receive(:client_streamer)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub, opts: interceptors_opts)
+          requests = [EchoMsg.new, EchoMsg.new]
+          expect_any_instance_of(GRPC::ActiveCall).to receive(:client_streamer)
+            .with(requests, metadata: { 'foo' => 'bar_from_client_streamer' })
+            .once.and_call_original
+          expect(stub.a_client_streaming_rpc(requests)).to be_a(EchoMsg)
+        end
+      end
+    end
+
+    context 'with a server streaming call' do
+      it 'should be called', server: true do
+        expect(interceptor).to receive(:server_streamer)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub, opts: interceptors_opts)
+          request = EchoMsg.new
+          expect_any_instance_of(GRPC::ActiveCall).to receive(:server_streamer)
+            .once.and_call_original
+          responses = stub.a_server_streaming_rpc(request)
+          responses.each do |r|
+            expect(r).to be_a(EchoMsg)
+          end
+        end
+      end
+
+      it 'can modify outgoing metadata', server: true do
+        expect(interceptor).to receive(:server_streamer)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub, opts: interceptors_opts)
+          request = EchoMsg.new
+          expect_any_instance_of(GRPC::ActiveCall).to receive(:server_streamer)
+            .with(request, metadata: { 'foo' => 'bar_from_server_streamer' })
+            .once.and_call_original
+          responses = stub.a_server_streaming_rpc(request)
+          responses.each do |r|
+            expect(r).to be_a(EchoMsg)
+          end
+        end
+      end
+    end
+
+    context 'with a bidi call' do
+      it 'should be called', server: true do
+        expect(interceptor).to receive(:bidi_streamer)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub, opts: interceptors_opts)
+          expect_any_instance_of(GRPC::ActiveCall).to receive(:bidi_streamer)
+            .once.and_call_original
+          requests = [EchoMsg.new, EchoMsg.new]
+          responses = stub.a_bidi_rpc(requests)
+          responses.each do |r|
+            expect(r).to be_a(EchoMsg)
+          end
+        end
+      end
+
+      it 'can modify outgoing metadata', server: true do
+        expect(interceptor).to receive(:bidi_streamer)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub, opts: interceptors_opts)
+          requests = [EchoMsg.new, EchoMsg.new]
+          expect_any_instance_of(GRPC::ActiveCall).to receive(:bidi_streamer)
+            .with(requests, metadata: { 'foo' => 'bar_from_bidi_streamer' })
+            .once.and_call_original
+          responses = stub.a_bidi_rpc(requests)
+          responses.each do |r|
+            expect(r).to be_a(EchoMsg)
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/src/ruby/spec/generic/interceptor_registry_spec.rb b/src/ruby/spec/generic/interceptor_registry_spec.rb
new file mode 100644
index 0000000000..f93f5cec09
--- /dev/null
+++ b/src/ruby/spec/generic/interceptor_registry_spec.rb
@@ -0,0 +1,65 @@
+# 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.
+require 'spec_helper'
+
+describe GRPC::InterceptorRegistry do
+  let(:server) { RpcServer.new }
+  let(:interceptor) { TestServerInterceptor.new }
+  let(:interceptors) { [interceptor] }
+  let(:registry) { described_class.new(interceptors) }
+
+  describe 'initialization' do
+    subject { registry }
+
+    context 'with an interceptor extending GRPC::ServerInterceptor' do
+      it 'should add the interceptor to the registry' do
+        subject
+        is = registry.instance_variable_get('@interceptors')
+        expect(is.count).to eq 1
+        expect(is.first).to eq interceptor
+      end
+    end
+
+    context 'with multiple interceptors' do
+      let(:interceptor2) { TestServerInterceptor.new }
+      let(:interceptor3) { TestServerInterceptor.new }
+      let(:interceptors) { [interceptor, interceptor2, interceptor3] }
+
+      it 'should maintain order of insertion when iterated against' do
+        subject
+        is = registry.instance_variable_get('@interceptors')
+        expect(is.count).to eq 3
+        is.each_with_index do |i, idx|
+          case idx
+          when 0
+            expect(i).to eq interceptor
+          when 1
+            expect(i).to eq interceptor2
+          when 2
+            expect(i).to eq interceptor3
+          end
+        end
+      end
+    end
+
+    context 'with an interceptor not extending GRPC::ServerInterceptor' do
+      let(:interceptor) { Class }
+      let(:err) { GRPC::InterceptorRegistry::DescendantError }
+
+      it 'should raise an InvalidArgument exception' do
+        expect { subject }.to raise_error(err)
+      end
+    end
+  end
+end
diff --git a/src/ruby/spec/generic/rpc_server_spec.rb b/src/ruby/spec/generic/rpc_server_spec.rb
index b887eaaf4e..05059fbecf 100644
--- a/src/ruby/spec/generic/rpc_server_spec.rb
+++ b/src/ruby/spec/generic/rpc_server_spec.rb
@@ -11,8 +11,7 @@
 # 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.
-
-require 'grpc'
+require 'spec_helper'
 
 def load_test_certs
   test_root = File.join(File.dirname(File.dirname(__FILE__)), 'testdata')
@@ -28,17 +27,6 @@ def check_md(wanted_md, received_md)
   end
 end
 
-# A test message
-class EchoMsg
-  def self.marshal(_o)
-    ''
-  end
-
-  def self.unmarshal(_o)
-    EchoMsg.new
-  end
-end
-
 # A test service with no methods.
 class EmptyService
   include GRPC::GenericService
@@ -50,27 +38,6 @@ class NoRpcImplementation
   rpc :an_rpc, EchoMsg, EchoMsg
 end
 
-# A test service with an echo implementation.
-class EchoService
-  include GRPC::GenericService
-  rpc :an_rpc, EchoMsg, EchoMsg
-  attr_reader :received_md
-
-  def initialize(**kw)
-    @trailing_metadata = kw
-    @received_md = []
-  end
-
-  def an_rpc(req, call)
-    GRPC.logger.info('echo service received a request')
-    call.output_metadata.update(@trailing_metadata)
-    @received_md << call.metadata unless call.metadata.nil?
-    req
-  end
-end
-
-EchoStub = EchoService.rpc_stub_class
-
 # A test service with an implementation that fails with BadStatus
 class FailingService
   include GRPC::GenericService
diff --git a/src/ruby/spec/generic/server_interceptors_spec.rb b/src/ruby/spec/generic/server_interceptors_spec.rb
new file mode 100644
index 0000000000..eb86686084
--- /dev/null
+++ b/src/ruby/spec/generic/server_interceptors_spec.rb
@@ -0,0 +1,218 @@
+# 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.
+require 'spec_helper'
+
+describe 'Server Interceptors' do
+  let(:interceptor) { TestServerInterceptor.new }
+  let(:request) { EchoMsg.new }
+  let(:trailing_metadata) { {} }
+  let(:service) { EchoService.new(trailing_metadata) }
+  let(:interceptors) { [] }
+
+  before(:each) do
+    build_rpc_server(server_opts: { interceptors: interceptors })
+  end
+
+  context 'when a server interceptor is added' do
+    let(:interceptors) { [interceptor] }
+    let(:client_metadata) { { client_md: 'test' } }
+    let(:client_call_opts) { { metadata: client_metadata, return_op: true } }
+
+    context 'with a request/response call' do
+      let(:trailing_metadata) { { server_om: 'from_request_response' } }
+
+      it 'should be called', server: true do
+        expect(interceptor).to receive(:request_response)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub)
+          expect(stub.an_rpc(request)).to be_a(EchoMsg)
+        end
+      end
+
+      it 'can modify trailing metadata', server: true do
+        expect(interceptor).to receive(:request_response)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub)
+          expect_any_instance_of(GRPC::ActiveCall).to(
+            receive(:request_response).with(request, metadata: client_metadata)
+              .once.and_call_original
+          )
+          op = stub.an_rpc(request, client_call_opts)
+          msg = op.execute
+          expect(op.trailing_metadata).to eq(
+            'interc' => 'from_request_response',
+            'server_om' => 'from_request_response'
+          )
+          expect(msg).to be_a(EchoMsg)
+        end
+      end
+    end
+
+    context 'with a client streaming call' do
+      let(:trailing_metadata) { { server_om: 'from_client_streamer' } }
+      let(:requests) { [EchoMsg.new, EchoMsg.new] }
+
+      it 'should be called', server: true do
+        expect(interceptor).to receive(:client_streamer)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub)
+          expect(stub.a_client_streaming_rpc(requests)).to be_a(EchoMsg)
+        end
+      end
+
+      it 'can modify trailing metadata', server: true do
+        expect(interceptor).to receive(:client_streamer)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub)
+          expect_any_instance_of(GRPC::ActiveCall).to(
+            receive(:client_streamer).with(requests)
+              .once.and_call_original
+          )
+          op = stub.a_client_streaming_rpc(requests, client_call_opts)
+          msg = op.execute
+          expect(op.trailing_metadata).to eq(
+            'interc' => 'from_client_streamer',
+            'server_om' => 'from_client_streamer'
+          )
+          expect(msg).to be_a(EchoMsg)
+        end
+      end
+    end
+
+    context 'with a server streaming call' do
+      let(:trailing_metadata) { { server_om: 'from_server_streamer' } }
+      let(:request) { EchoMsg.new }
+
+      it 'should be called', server: true do
+        expect(interceptor).to receive(:server_streamer)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub)
+          responses = stub.a_server_streaming_rpc(request)
+          responses.each do |r|
+            expect(r).to be_a(EchoMsg)
+          end
+        end
+      end
+
+      it 'can modify trailing metadata', server: true do
+        expect(interceptor).to receive(:server_streamer)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub)
+          expect_any_instance_of(GRPC::ActiveCall).to(
+            receive(:server_streamer).with(request)
+              .once.and_call_original
+          )
+          op = stub.a_server_streaming_rpc(request, client_call_opts)
+          responses = op.execute
+          responses.each do |r|
+            expect(r).to be_a(EchoMsg)
+          end
+          expect(op.trailing_metadata).to eq(
+            'interc' => 'from_server_streamer',
+            'server_om' => 'from_server_streamer'
+          )
+        end
+      end
+    end
+
+    context 'with a bidi call' do
+      let(:trailing_metadata) { { server_om: 'from_bidi_streamer' } }
+      let(:requests) { [EchoMsg.new, EchoMsg.new] }
+
+      it 'should be called', server: true do
+        expect(interceptor).to receive(:bidi_streamer)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub)
+          responses = stub.a_bidi_rpc(requests)
+          responses.each do |r|
+            expect(r).to be_a(EchoMsg)
+          end
+        end
+      end
+
+      it 'can modify trailing metadata', server: true do
+        expect(interceptor).to receive(:bidi_streamer)
+          .once.and_call_original
+
+        run_services_on_server(@server, services: [service]) do
+          stub = build_insecure_stub(EchoStub)
+          expect_any_instance_of(GRPC::ActiveCall).to(
+            receive(:bidi_streamer).with(requests)
+              .once.and_call_original
+          )
+          op = stub.a_bidi_rpc(requests, client_call_opts)
+          responses = op.execute
+          responses.each do |r|
+            expect(r).to be_a(EchoMsg)
+          end
+          expect(op.trailing_metadata).to eq(
+            'interc' => 'from_bidi_streamer',
+            'server_om' => 'from_bidi_streamer'
+          )
+        end
+      end
+    end
+  end
+
+  context 'when multiple interceptors are added' do
+    let(:interceptor2) { TestServerInterceptor.new }
+    let(:interceptor3) { TestServerInterceptor.new }
+    let(:interceptors) do
+      [
+        interceptor,
+        interceptor2,
+        interceptor3
+      ]
+    end
+
+    it 'each should be called', server: true do
+      expect(interceptor).to receive(:request_response)
+        .once.and_call_original
+      expect(interceptor2).to receive(:request_response)
+        .once.and_call_original
+      expect(interceptor3).to receive(:request_response)
+        .once.and_call_original
+
+      run_services_on_server(@server, services: [service]) do
+        stub = build_insecure_stub(EchoStub)
+        expect(stub.an_rpc(request)).to be_a(EchoMsg)
+      end
+    end
+  end
+
+  context 'when an interceptor is not added' do
+    it 'should not be called', server: true do
+      expect(interceptor).to_not receive(:call)
+
+      run_services_on_server(@server, services: [service]) do
+        stub = build_insecure_stub(EchoStub)
+        expect(stub.an_rpc(request)).to be_a(EchoMsg)
+      end
+    end
+  end
+end
diff --git a/src/ruby/spec/google_rpc_status_utils_spec.rb b/src/ruby/spec/google_rpc_status_utils_spec.rb
new file mode 100644
index 0000000000..fe221c30dd
--- /dev/null
+++ b/src/ruby/spec/google_rpc_status_utils_spec.rb
@@ -0,0 +1,223 @@
+# 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.
+
+require 'grpc'
+require_relative '../lib/grpc/google_rpc_status_utils'
+require_relative '../pb/src/proto/grpc/testing/messages_pb'
+require_relative '../pb/src/proto/grpc/testing/messages_pb'
+require 'google/protobuf/well_known_types'
+
+include GRPC::Core
+
+describe 'conversion from a status struct to a google protobuf status' do
+  it 'fails if the input is not a status struct' do
+    begin
+      GRPC::GoogleRpcStatusUtils.extract_google_rpc_status('string')
+    rescue => e
+      exception = e
+    end
+    expect(exception.is_a?(ArgumentError)).to be true
+    expect(exception.message.include?('bad type')).to be true
+  end
+
+  it 'fails with some error if the header key is missing' do
+    status = Struct::Status.new(1, 'details', key: 'val')
+    expect(status.metadata.nil?).to be false
+    expect do
+      GRPC::GoogleRpcStatusUtils.extract_google_rpc_status(status)
+    end.to raise_error(StandardError)
+  end
+
+  it 'fails with some error if the header key fails to deserialize' do
+    status = Struct::Status.new(1, 'details',
+                                'grpc-status-details-bin' => 'string_val')
+    expect do
+      GRPC::GoogleRpcStatusUtils.extract_google_rpc_status(status)
+    end.to raise_error(StandardError)
+  end
+
+  it 'silently ignores erroneous mismatch between messages in '\
+    'status struct and protobuf status' do
+    proto = Google::Rpc::Status.new(code: 1, message: 'proto message')
+    encoded_proto = Google::Rpc::Status.encode(proto)
+    status = Struct::Status.new(1, 'struct message',
+                                'grpc-status-details-bin' => encoded_proto)
+    rpc_status = GRPC::GoogleRpcStatusUtils.extract_google_rpc_status(status)
+    expect(rpc_status).to eq(proto)
+  end
+
+  it 'silently ignores erroneous mismatch between codes in status struct '\
+    'and protobuf status' do
+    proto = Google::Rpc::Status.new(code: 1, message: 'matching message')
+    encoded_proto = Google::Rpc::Status.encode(proto)
+    status = Struct::Status.new(2, 'matching message',
+                                'grpc-status-details-bin' => encoded_proto)
+    rpc_status = GRPC::GoogleRpcStatusUtils.extract_google_rpc_status(status)
+    expect(rpc_status).to eq(proto)
+  end
+
+  it 'can succesfully convert a status struct into a google protobuf status '\
+    'when there are no rpcstatus details' do
+    proto = Google::Rpc::Status.new(code: 1, message: 'matching message')
+    encoded_proto = Google::Rpc::Status.encode(proto)
+    status = Struct::Status.new(1, 'matching message',
+                                'grpc-status-details-bin' => encoded_proto)
+    out = GRPC::GoogleRpcStatusUtils.extract_google_rpc_status(status)
+    expect(out.code).to eq(1)
+    expect(out.message).to eq('matching message')
+    expect(out.details).to eq([])
+  end
+
+  it 'can succesfully convert a status struct into a google protobuf '\
+    'status when there are multiple rpcstatus details' do
+    simple_request_any = Google::Protobuf::Any.new
+    simple_request = Grpc::Testing::SimpleRequest.new(
+      payload: Grpc::Testing::Payload.new(body: 'request'))
+    simple_request_any.pack(simple_request)
+    simple_response_any = Google::Protobuf::Any.new
+    simple_response = Grpc::Testing::SimpleResponse.new(
+      payload: Grpc::Testing::Payload.new(body: 'response'))
+    simple_response_any.pack(simple_response)
+    payload_any = Google::Protobuf::Any.new
+    payload = Grpc::Testing::Payload.new(body: 'payload')
+    payload_any.pack(payload)
+    proto = Google::Rpc::Status.new(code: 1,
+                                    message: 'matching message',
+                                    details: [
+                                      simple_request_any,
+                                      simple_response_any,
+                                      payload_any
+                                    ])
+    encoded_proto = Google::Rpc::Status.encode(proto)
+    status = Struct::Status.new(1, 'matching message',
+                                'grpc-status-details-bin' => encoded_proto)
+    out = GRPC::GoogleRpcStatusUtils.extract_google_rpc_status(status)
+    expect(out.code).to eq(1)
+    expect(out.message).to eq('matching message')
+    expect(out.details[0].unpack(
+             Grpc::Testing::SimpleRequest)).to eq(simple_request)
+    expect(out.details[1].unpack(
+             Grpc::Testing::SimpleResponse)).to eq(simple_response)
+    expect(out.details[2].unpack(
+             Grpc::Testing::Payload)).to eq(payload)
+  end
+end
+
+# Test message
+class EchoMsg
+  def self.marshal(_o)
+    ''
+  end
+
+  def self.unmarshal(_o)
+    EchoMsg.new
+  end
+end
+
+# A test service that fills in the "reserved" grpc-status-details-bin trailer,
+# for client-side testing of GoogleRpcStatus protobuf extraction from trailers.
+class GoogleRpcStatusTestService
+  include GRPC::GenericService
+  rpc :an_rpc, EchoMsg, EchoMsg
+
+  def initialize(encoded_rpc_status)
+    @encoded_rpc_status = encoded_rpc_status
+  end
+
+  def an_rpc(_, _)
+    # TODO: create a server-side utility API for sending a google rpc status.
+    # Applications are not expected to set the grpc-status-details-bin
+    # ("grpc"-fixed and reserved for library use) manually.
+    # Doing so here is only for testing of the client-side api for extracting
+    # a google rpc status, which is useful
+    # when the interacting with a server that does fill in this trailer.
+    fail GRPC::Unknown.new('test message',
+                           'grpc-status-details-bin' => @encoded_rpc_status)
+  end
+end
+
+GoogleRpcStatusTestStub = GoogleRpcStatusTestService.rpc_stub_class
+
+describe 'receving a google rpc status from a remote endpoint' do
+  def start_server(encoded_rpc_status)
+    @srv = GRPC::RpcServer.new(pool_size: 1)
+    @server_port = @srv.add_http2_port('localhost:0',
+                                       :this_port_is_insecure)
+    @srv.handle(GoogleRpcStatusTestService.new(encoded_rpc_status))
+    @server_thd = Thread.new { @srv.run }
+    @srv.wait_till_running
+  end
+
+  def stop_server
+    expect(@srv.stopped?).to be(false)
+    @srv.stop
+    @server_thd.join
+    expect(@srv.stopped?).to be(true)
+  end
+
+  before(:each) do
+    simple_request_any = Google::Protobuf::Any.new
+    simple_request = Grpc::Testing::SimpleRequest.new(
+      payload: Grpc::Testing::Payload.new(body: 'request'))
+    simple_request_any.pack(simple_request)
+    simple_response_any = Google::Protobuf::Any.new
+    simple_response = Grpc::Testing::SimpleResponse.new(
+      payload: Grpc::Testing::Payload.new(body: 'response'))
+    simple_response_any.pack(simple_response)
+    payload_any = Google::Protobuf::Any.new
+    payload = Grpc::Testing::Payload.new(body: 'payload')
+    payload_any.pack(payload)
+    @expected_proto = Google::Rpc::Status.new(
+      code: StatusCodes::UNKNOWN,
+      message: 'test message',
+      details: [simple_request_any, simple_response_any, payload_any])
+    start_server(Google::Rpc::Status.encode(@expected_proto))
+  end
+
+  after(:each) do
+    stop_server
+  end
+
+  it 'should receive be able to extract a google rpc status from the '\
+    'status struct taken from a BadStatus exception' do
+    stub = GoogleRpcStatusTestStub.new("localhost:#{@server_port}",
+                                       :this_channel_is_insecure)
+    begin
+      stub.an_rpc(EchoMsg.new)
+    rescue GRPC::BadStatus => e
+      rpc_status = GRPC::GoogleRpcStatusUtils.extract_google_rpc_status(
+        e.to_status)
+    end
+    expect(rpc_status).to eq(@expected_proto)
+  end
+
+  it 'should receive be able to extract a google rpc status from the '\
+    'status struct taken from the op view of a call' do
+    stub = GoogleRpcStatusTestStub.new("localhost:#{@server_port}",
+                                       :this_channel_is_insecure)
+    op = stub.an_rpc(EchoMsg.new, return_op: true)
+    begin
+      op.execute
+    rescue GRPC::BadStatus => e
+      status_from_exception = e.to_status
+    end
+    rpc_status = GRPC::GoogleRpcStatusUtils.extract_google_rpc_status(
+      op.status)
+    expect(rpc_status).to eq(@expected_proto)
+    # "to_status" on the bad status should give the same result
+    # as "status" on the "op view".
+    expect(GRPC::GoogleRpcStatusUtils.extract_google_rpc_status(
+             status_from_exception)).to eq(rpc_status)
+  end
+end
diff --git a/src/ruby/spec/spec_helper.rb b/src/ruby/spec/spec_helper.rb
index 6e1eba1945..8fe9e6e808 100644
--- a/src/ruby/spec/spec_helper.rb
+++ b/src/ruby/spec/spec_helper.rb
@@ -32,6 +32,9 @@ require 'rspec'
 require 'logging'
 require 'rspec/logging_helper'
 
+require_relative 'support/services'
+require_relative 'support/helpers'
+
 # GRPC is the general RPC module
 #
 # Configure its logging for fine-grained log control during test runs
@@ -49,6 +52,7 @@ Logging.logger['GRPC::BidiCall'].level = :info
 RSpec.configure do |config|
   include RSpec::LoggingHelper
   config.capture_log_messages  # comment this out to see logs during test runs
+  include GRPC::Spec::Helpers
 end
 
 RSpec::Expectations.configuration.warn_about_potential_false_positives = false
diff --git a/src/ruby/spec/support/helpers.rb b/src/ruby/spec/support/helpers.rb
new file mode 100644
index 0000000000..65fffff9e7
--- /dev/null
+++ b/src/ruby/spec/support/helpers.rb
@@ -0,0 +1,73 @@
+# 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.
+
+# GRPC contains the General RPC module.
+module GRPC
+  ##
+  # GRPC RSpec base module
+  #
+  module Spec
+    ##
+    # A module that is used for providing generic helpers across the
+    # GRPC test suite
+    #
+    module Helpers
+      # Shortcut syntax for a GRPC RPC Server
+      RpcServer = GRPC::RpcServer
+
+      ##
+      # Build an RPC server used for testing
+      #
+      def build_rpc_server(server_opts: {},
+                           client_opts: {})
+        @server = RpcServer.new({ poll_period: 1 }.merge(server_opts))
+        @port = @server.add_http2_port('0.0.0.0:0', :this_port_is_insecure)
+        @host = "0.0.0.0:#{@port}"
+        @client_opts = client_opts
+        @server
+      end
+
+      ##
+      # Run services on an RPC server, yielding to allow testing within
+      #
+      # @param [RpcServer] server
+      # @param [Array<Class>] services
+      #
+      def run_services_on_server(server, services: [])
+        services.each do |s|
+          server.handle(s)
+        end
+        t = Thread.new { server.run }
+        server.wait_till_running
+
+        yield
+
+        server.stop
+        t.join
+      end
+
+      ##
+      # Build an insecure stub from a given stub class
+      #
+      # @param [Class] klass
+      # @param [String] host
+      #
+      def build_insecure_stub(klass, host: nil, opts: nil)
+        host ||= @host
+        opts ||= @client_opts
+        klass.new(host, :this_channel_is_insecure, **opts)
+      end
+    end
+  end
+end
diff --git a/src/ruby/spec/support/services.rb b/src/ruby/spec/support/services.rb
new file mode 100644
index 0000000000..27cc8e61ac
--- /dev/null
+++ b/src/ruby/spec/support/services.rb
@@ -0,0 +1,147 @@
+# 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 stubs for various scenarios
+require 'grpc'
+
+# A test message
+class EchoMsg
+  def self.marshal(_o)
+    ''
+  end
+
+  def self.unmarshal(_o)
+    EchoMsg.new
+  end
+end
+
+# A test service with an echo implementation.
+class EchoService
+  include GRPC::GenericService
+  rpc :an_rpc, EchoMsg, EchoMsg
+  rpc :a_client_streaming_rpc, stream(EchoMsg), EchoMsg
+  rpc :a_server_streaming_rpc, EchoMsg, stream(EchoMsg)
+  rpc :a_bidi_rpc, stream(EchoMsg), stream(EchoMsg)
+  attr_reader :received_md
+
+  def initialize(**kw)
+    @trailing_metadata = kw
+    @received_md = []
+  end
+
+  def an_rpc(req, call)
+    GRPC.logger.info('echo service received a request')
+    call.output_metadata.update(@trailing_metadata)
+    @received_md << call.metadata unless call.metadata.nil?
+    req
+  end
+
+  def a_client_streaming_rpc(call)
+    # iterate through requests so call can complete
+    call.output_metadata.update(@trailing_metadata)
+    call.each_remote_read.each { |r| p r }
+    EchoMsg.new
+  end
+
+  def a_server_streaming_rpc(_req, call)
+    call.output_metadata.update(@trailing_metadata)
+    [EchoMsg.new, EchoMsg.new]
+  end
+
+  def a_bidi_rpc(requests, call)
+    call.output_metadata.update(@trailing_metadata)
+    requests.each { |r| p r }
+    [EchoMsg.new, EchoMsg.new]
+  end
+end
+
+EchoStub = EchoService.rpc_stub_class
+
+# For testing server interceptors
+class TestServerInterceptor < GRPC::ServerInterceptor
+  def request_response(request:, call:, method:)
+    p "Received request/response call at method #{method}" \
+      " with request #{request} for call #{call}"
+    call.output_metadata[:interc] = 'from_request_response'
+    p "[GRPC::Ok] (#{method.owner.name}.#{method.name})"
+    yield
+  end
+
+  def client_streamer(call:, method:)
+    call.output_metadata[:interc] = 'from_client_streamer'
+    call.each_remote_read.each do |r|
+      p "In interceptor: #{r}"
+    end
+    p "Received client streamer call at method #{method} for call #{call}"
+    yield
+  end
+
+  def server_streamer(request:, call:, method:)
+    p "Received server streamer call at method #{method} with request" \
+      " #{request} for call #{call}"
+    call.output_metadata[:interc] = 'from_server_streamer'
+    yield
+  end
+
+  def bidi_streamer(requests:, call:, method:)
+    requests.each do |r|
+      p "Bidi request: #{r}"
+    end
+    p "Received bidi streamer call at method #{method} with requests" \
+      " #{requests} for call #{call}"
+    call.output_metadata[:interc] = 'from_bidi_streamer'
+    yield
+  end
+end
+
+# For testing client interceptors
+class TestClientInterceptor < GRPC::ClientInterceptor
+  def request_response(request:, call:, method:, metadata: {})
+    p "Intercepted request/response call at method #{method}" \
+      " with request #{request} for call #{call}" \
+      " and metadata: #{metadata}"
+    metadata['foo'] = 'bar_from_request_response'
+    yield
+  end
+
+  def client_streamer(requests:, call:, method:, metadata: {})
+    p "Received client streamer call at method #{method}" \
+      " with requests #{requests} for call #{call}" \
+      " and metadata: #{metadata}"
+    requests.each do |r|
+      p "In client interceptor: #{r}"
+    end
+    metadata['foo'] = 'bar_from_client_streamer'
+    yield
+  end
+
+  def server_streamer(request:, call:, method:, metadata: {})
+    p "Received server streamer call at method #{method}" \
+      " with request #{request} for call #{call}" \
+      " and metadata: #{metadata}"
+    metadata['foo'] = 'bar_from_server_streamer'
+    yield
+  end
+
+  def bidi_streamer(requests:, call:, method:, metadata: {})
+    p "Received bidi streamer call at method #{method}" \
+      "with requests #{requests} for call #{call}" \
+      " and metadata: #{metadata}"
+    requests.each do |r|
+      p "In client interceptor: #{r}"
+    end
+    metadata['foo'] = 'bar_from_bidi_streamer'
+    yield
+  end
+end
diff --git a/templates/CMakeLists.txt.template b/templates/CMakeLists.txt.template
index 6adff889fe..567bd3b7f8 100644
--- a/templates/CMakeLists.txt.template
+++ b/templates/CMakeLists.txt.template
@@ -168,10 +168,8 @@
       set(gRPC_INSTALL FALSE)
     endif()
   elseif("<%text>${gRPC_ZLIB_PROVIDER}</%text>" STREQUAL "package")
-    find_package(ZLIB)
-    if(TARGET ZLIB::ZLIB)
-      set(_gRPC_ZLIB_LIBRARIES ZLIB::ZLIB)
-    endif()
+    find_package(ZLIB REQUIRED)
+    set(_gRPC_ZLIB_LIBRARIES <%text>${ZLIB_LIBRARIES}</%text>)
     set(_gRPC_FIND_ZLIB "if(NOT ZLIB_FOUND)\n  find_package(ZLIB)\nendif()")
   endif()
 
@@ -179,7 +177,8 @@
     if(NOT CARES_ROOT_DIR)
       set(CARES_ROOT_DIR <%text>${CMAKE_CURRENT_SOURCE_DIR}</%text>/third_party/cares/cares)
     endif()
-    set(CARES_STATIC ON)
+    set(CARES_SHARED OFF CACHE BOOL "disable shared library")
+    set(CARES_STATIC ON CACHE BOOL "link cares statically")
     set(CARES_INCLUDE_DIR "<%text>${CMAKE_CURRENT_SOURCE_DIR}</%text>/third_party/cares/cares")
     add_subdirectory(third_party/cares/cares)
     if(TARGET c-ares)
@@ -190,7 +189,7 @@
       set(gRPC_INSTALL FALSE)
     endif()
   elseif("<%text>${gRPC_CARES_PROVIDER}</%text>" STREQUAL "package")
-    find_package(c-ares CONFIG)
+    find_package(c-ares REQUIRED CONFIG)
     if(TARGET c-ares::cares)
       set(_gRPC_CARES_LIBRARIES c-ares::cares)
     endif()
@@ -234,7 +233,7 @@
       set(gRPC_INSTALL FALSE)
     endif()
   elseif("<%text>${gRPC_PROTOBUF_PROVIDER}</%text>" STREQUAL "package")
-    find_package(Protobuf <%text>${gRPC_PROTOBUF_PACKAGE_TYPE}</%text>)
+    find_package(Protobuf REQUIRED <%text>${gRPC_PROTOBUF_PACKAGE_TYPE}</%text>)
     if(Protobuf_FOUND OR PROTOBUF_FOUND)
       if(TARGET protobuf::<%text>${_gRPC_PROTOBUF_LIBRARY_NAME}</%text>)
         set(_gRPC_PROTOBUF_LIBRARIES protobuf::<%text>${_gRPC_PROTOBUF_LIBRARY_NAME}</%text>)
@@ -279,11 +278,9 @@
       set(gRPC_INSTALL FALSE)
     endif()
   elseif("<%text>${gRPC_SSL_PROVIDER}</%text>" STREQUAL "package")
-    find_package(OpenSSL)
-    if(TARGET OpenSSL::SSL)
-      set(_gRPC_SSL_LIBRARIES OpenSSL::SSL)
-    endif()
-    set(_gRPC_FIND_SSL "if(NOT OpenSSL_FOUND)\n  find_package(OpenSSL)\nendif()")
+    find_package(OpenSSL REQUIRED)
+    set(_gRPC_SSL_LIBRARIES <%text>${OPENSSL_LIBRARIES}</%text>)
+    set(_gRPC_FIND_SSL "if(NOT OPENSSL_FOUND)\n  find_package(OpenSSL)\nendif()")
   endif()
 
   if("<%text>${gRPC_GFLAGS_PROVIDER}</%text>" STREQUAL "module")
@@ -515,7 +512,7 @@
   % endfor
 
   target_include_directories(${lib.name}
-    PUBLIC <%text>$<INSTALL_INTERFACE:include> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include></%text>
+    PUBLIC <%text>$<INSTALL_INTERFACE:${gRPC_INSTALL_INCLUDEDIR}> $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include></%text>
     PRIVATE <%text>${CMAKE_CURRENT_SOURCE_DIR}</%text>
     PRIVATE <%text>${BORINGSSL_ROOT_DIR}</%text>/include
     PRIVATE <%text>${PROTOBUF_ROOT_DIR}</%text>/src
diff --git a/templates/config.m4.template b/templates/config.m4.template
index f91893c2bd..cd93fbd0fb 100644
--- a/templates/config.m4.template
+++ b/templates/config.m4.template
@@ -14,7 +14,7 @@
     LIBS="-lpthread $LIBS"
 
     CFLAGS="-Wall -Werror -Wno-parentheses-equality -Wno-unused-value -std=c11"
-    CXXFLAGS="-std=c++11"
+    CXXFLAGS="-std=c++11 -fno-exceptions -fno-rtti"
     GRPC_SHARED_LIBADD="-lpthread $GRPC_SHARED_LIBADD"
     PHP_REQUIRE_CXX()
     PHP_ADD_LIBRARY(pthread)
diff --git a/templates/grpc.gemspec.template b/templates/grpc.gemspec.template
index e62e5b2721..215d5f9df9 100644
--- a/templates/grpc.gemspec.template
+++ b/templates/grpc.gemspec.template
@@ -31,6 +31,7 @@
 
     s.add_dependency 'google-protobuf', '~> 3.1'
     s.add_dependency 'googleauth',      '~> 0.5.1'
+    s.add_dependency 'googleapis-common-protos-types', '~> 1.0.0'
 
     s.add_development_dependency 'bundler',            '~> 1.9'
     s.add_development_dependency 'facter',             '~> 2.4'
diff --git a/templates/package.xml.template b/templates/package.xml.template
index 15da704a47..f10f75b8c0 100644
--- a/templates/package.xml.template
+++ b/templates/package.xml.template
@@ -12,7 +12,7 @@
     <email>grpc-packages@google.com</email>
     <active>yes</active>
    </lead>
-   <date>2017-05-22</date>
+   <date>2017-08-24</date>
    <time>16:06:07</time>
    <version>
     <release>${settings.php_version.php()}</release>
@@ -27,6 +27,9 @@
   - Channel are now by default persistent #11878
   - Some bug fixes from 1.4 branch #12109, #12123
   - Fixed hang bug when fork() was used #11814
+  - License changed to Apache 2.0
+  - Added support for php_namespace option in codegen plugin #11886
+  - Updated gRPC C Core library version 1.6
    </notes>
    <contents>
     <dir baseinstalldir="/" name="/">
diff --git a/templates/src/python/grpcio_testing/grpc_version.py.template b/templates/src/python/grpcio_testing/grpc_version.py.template
new file mode 100644
index 0000000000..74db811d60
--- /dev/null
+++ b/templates/src/python/grpcio_testing/grpc_version.py.template
@@ -0,0 +1,19 @@
+%YAML 1.2
+--- |
+  # Copyright 2017 gRPC authors.
+  #
+  # Licensed under the Apache License, Version 2.0 (the "License");
+  # you may not use this file except in compliance with the License.
+  # You may obtain a copy of the License at
+  #
+  #     http://www.apache.org/licenses/LICENSE-2.0
+  #
+  # Unless required by applicable law or agreed to in writing, software
+  # distributed under the License is distributed on an "AS IS" BASIS,
+  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  # See the License for the specific language governing permissions and
+  # limitations under the License.
+
+  # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_testing/grpc_version.py.template`!!!
+
+  VERSION='${settings.python_version.pep440()}'
diff --git a/templates/test/cpp/naming/resolver_component_tests_defs.include b/templates/test/cpp/naming/resolver_component_tests_defs.include
new file mode 100644
index 0000000000..6fa91c741a
--- /dev/null
+++ b/templates/test/cpp/naming/resolver_component_tests_defs.include
@@ -0,0 +1,92 @@
+<%def name="resolver_component_tests(tests)">#!/bin/bash
+# Copyright 2015 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.
+
+# This file is auto-generated
+
+set -ex
+
+# all command args required in this set order
+FLAGS_test_bin_path=`echo "$1" | grep '\--test_bin_path=' | cut -d "=" -f 2`
+FLAGS_dns_server_bin_path=`echo "$2" | grep '\--dns_server_bin_path=' | cut -d "=" -f 2`
+FLAGS_records_config_path=`echo "$3" | grep '\--records_config_path=' | cut -d "=" -f 2`
+FLAGS_test_dns_server_port=`echo "$4" | grep '\--test_dns_server_port=' | cut -d "=" -f 2`
+
+for cmd_arg in "$FLAGS_test_bin_path" "$FLAGS_dns_server_bin_path" "$FLAGS_records_config_path" "$FLAGS_test_dns_server_port"; do
+  if [[ "$cmd_arg" == "" ]]; then
+    echo "Missing a CMD arg" && exit 1
+  fi
+done
+
+if [[ "$GRPC_DNS_RESOLVER" != "" && "$GRPC_DNS_RESOLVER" != ares ]]; then
+  echo "This test only works under GRPC_DNS_RESOLVER=ares. Have GRPC_DNS_RESOLVER=$GRPC_DNS_RESOLVER" && exit 1
+fi
+export GRPC_DNS_RESOLVER=ares
+
+"$FLAGS_dns_server_bin_path" --records_config_path="$FLAGS_records_config_path" --port="$FLAGS_test_dns_server_port" 2>&1 > /dev/null &
+DNS_SERVER_PID=$!
+echo "Local DNS server started. PID: $DNS_SERVER_PID"
+
+# Health check local DNS server TCP and UDP ports
+for ((i=0;i<30;i++));
+do
+  echo "Retry health-check DNS query to local DNS server over tcp and udp"
+  RETRY=0
+  dig A health-check-local-dns-server-is-alive.resolver-tests.grpctestingexp. @localhost -p "$FLAGS_test_dns_server_port" +tries=1 +timeout=1 | grep '123.123.123.123' || RETRY=1
+  dig A health-check-local-dns-server-is-alive.resolver-tests.grpctestingexp. @localhost -p "$FLAGS_test_dns_server_port" +tries=1 +timeout=1 +tcp | grep '123.123.123.123' || RETRY=1
+  if [[ "$RETRY" == 0 ]]; then
+    break
+  fi;
+  sleep 0.1
+done
+
+if [[ $RETRY == 1 ]]; then
+  echo "FAILED TO START LOCAL DNS SERVER"
+  kill -SIGTERM $DNS_SERVER_PID
+  wait
+  exit 1
+fi
+
+function terminate_all {
+  echo "Received signal. Terminating $! and $DNS_SERVER_PID"
+  kill -SIGTERM $! || true
+  kill -SIGTERM $DNS_SERVER_PID || true
+  wait
+  exit 1
+}
+
+trap terminate_all SIGTERM SIGINT
+
+EXIT_CODE=0
+# TODO: this test should check for GCE residency and skip tests using _grpclb._tcp.* SRV records once GCE residency checks are made
+# in the resolver.
+
+% for test in tests:
+$FLAGS_test_bin_path \\
+
+  --target_name='${test['target_name']}' \\
+
+  --expected_addrs='${test['expected_addrs']}' \\
+
+  --expected_chosen_service_config='${test['expected_chosen_service_config']}' \\
+
+  --expected_lb_policy='${test['expected_lb_policy']}' \\
+
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+% endfor
+kill -SIGTERM $DNS_SERVER_PID || true
+wait
+exit $EXIT_CODE</%def>
diff --git a/templates/test/cpp/naming/resolver_component_tests_runner.sh.template b/templates/test/cpp/naming/resolver_component_tests_runner.sh.template
new file mode 100644
index 0000000000..86772dd141
--- /dev/null
+++ b/templates/test/cpp/naming/resolver_component_tests_runner.sh.template
@@ -0,0 +1,4 @@
+%YAML 1.2
+--- |
+  <%namespace file="resolver_component_tests_defs.include" import="*"/>\
+  ${resolver_component_tests(resolver_component_test_cases)}
diff --git a/templates/tools/dockerfile/apt_get_basic.include b/templates/tools/dockerfile/apt_get_basic.include
index 9237e7dace..6e19e65157 100644
--- a/templates/tools/dockerfile/apt_get_basic.include
+++ b/templates/tools/dockerfile/apt_get_basic.include
@@ -6,6 +6,7 @@ RUN apt-get update && apt-get install -y ${'\\'}
   bzip2 ${'\\'}
   ccache ${'\\'}
   curl ${'\\'}
+  dnsutils ${'\\'}
   gcc ${'\\'}
   gcc-multilib ${'\\'}
   git ${'\\'}
diff --git a/templates/tools/dockerfile/clang_format.include b/templates/tools/dockerfile/clang_format.include
index 9a2b60ba8c..81bd2be797 100644
--- a/templates/tools/dockerfile/clang_format.include
+++ b/templates/tools/dockerfile/clang_format.include
@@ -1,5 +1,5 @@
 RUN apt-get update && apt-get -y install wget
-RUN echo deb http://llvm.org/apt/wily/ llvm-toolchain-wily-3.8 main >> /etc/apt/sources.list
-RUN echo deb-src http://llvm.org/apt/wily/ llvm-toolchain-wily-3.8 main >> /etc/apt/sources.list
-RUN wget -O - http://llvm.org/apt/llvm-snapshot.gpg.key| apt-key add -
+RUN echo "deb http://llvm.org/apt/jessie/ llvm-toolchain-jessie-3.8 main" >> /etc/apt/sources.list
+RUN echo "deb-src http://llvm.org/apt/jessie/ llvm-toolchain-jessie-3.8 main" >> /etc/apt/sources.list
+RUN wget -O - http://llvm.org/apt/llvm-snapshot.gpg.key | apt-key add -
 RUN apt-get update && apt-get -y install clang-format-3.8
diff --git a/templates/tools/dockerfile/grpc_clang_format/Dockerfile.template b/templates/tools/dockerfile/grpc_clang_format/Dockerfile.template
index 69cd4034b0..1ab667c95d 100644
--- a/templates/tools/dockerfile/grpc_clang_format/Dockerfile.template
+++ b/templates/tools/dockerfile/grpc_clang_format/Dockerfile.template
@@ -14,9 +14,10 @@
   # See the License for the specific language governing permissions and
   # limitations under the License.
   
-  FROM ubuntu:15.10
+  FROM debian:jessie
   
   <%include file="../clang_format.include"/>
   ADD clang_format_all_the_things.sh /
   CMD ["echo 'Run with tools/distrib/clang_format_code.sh'"]
   
+  
\ No newline at end of file
diff --git a/templates/tools/dockerfile/python_deps.include b/templates/tools/dockerfile/python_deps.include
index 2c12981418..94b854ad21 100644
--- a/templates/tools/dockerfile/python_deps.include
+++ b/templates/tools/dockerfile/python_deps.include
@@ -11,4 +11,4 @@ RUN apt-get update && apt-get install -y ${'\\'}
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
diff --git a/templates/tools/dockerfile/test/sanity/Dockerfile.template b/templates/tools/dockerfile/test/sanity/Dockerfile.template
index 3f9ea32233..bf34c0ab0f 100644
--- a/templates/tools/dockerfile/test/sanity/Dockerfile.template
+++ b/templates/tools/dockerfile/test/sanity/Dockerfile.template
@@ -14,7 +14,7 @@
   # See the License for the specific language governing permissions and
   # limitations under the License.
   
-  FROM ubuntu:15.10
+  FROM debian:jessie
   
   <%include file="../../apt_get_basic.include"/>
   <%include file="../../gcp_api_libraries.include"/>
@@ -33,14 +33,23 @@
   
   #======================================
   # More sanity test dependencies (bazel)
-  RUN apt-get install -y openjdk-8-jdk
-  # Check out Bazel version 0.4.1 since this version allows running
-  # ./compile.sh without a local protoc dependency
-  # TODO(mattkwong): install dependencies to support latest Bazel version if newer
-  # version is needed
-  RUN git clone https://github.com/bazelbuild/bazel.git /bazel && ${"\\"}
-    cd /bazel && git checkout tags/0.4.1 && ./compile.sh
-  RUN ln -s /bazel/output/bazel /bin/
+  RUN echo "deb http://http.debian.net/debian jessie-backports main" >> /etc/apt/sources.list
+  RUN apt-get update
+  RUN apt-get install -y -t jessie-backports openjdk-8-jdk
+
+  #========================
+  # Bazel installation
+  RUN echo "deb [arch=amd64] http://storage.googleapis.com/bazel-apt stable jdk1.8" > /etc/apt/sources.list.d/bazel.list
+  RUN curl https://bazel.build/bazel-release.pub.gpg | apt-key add -
+  RUN apt-get -y update
+  RUN apt-get -y install bazel
+
+  # Pin Bazel to 0.4.4
+  # Installing Bazel via apt-get first is required before installing 0.4.4 to
+  # allow gRPC to build without errors. See https://github.com/grpc/grpc/issues/10553
+  RUN curl -fSsL -O https://github.com/bazelbuild/bazel/releases/download/0.4.4/bazel-0.4.4-installer-linux-x86_64.sh
+  RUN chmod +x ./bazel-0.4.4-installer-linux-x86_64.sh
+  RUN ./bazel-0.4.4-installer-linux-x86_64.sh
   
   <%include file="../../clang_format.include"/>
   <%include file="../../run_tests_addons.include"/>
diff --git a/test/core/client_channel/lb_policies_test.c b/test/core/client_channel/lb_policies_test.c
index f70a9fc880..ba37cd673f 100644
--- a/test/core/client_channel/lb_policies_test.c
+++ b/test/core/client_channel/lb_policies_test.c
@@ -519,7 +519,7 @@ static grpc_channel *create_client(const servers_fixture *f) {
   arg_array[1].key = GRPC_ARG_LB_POLICY_NAME;
   arg_array[1].value.string = "ROUND_ROBIN";
   arg_array[2].type = GRPC_ARG_INTEGER;
-  arg_array[2].key = GRPC_ARG_HTTP2_MIN_TIME_BETWEEN_PINGS_MS;
+  arg_array[2].key = GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS;
   arg_array[2].value.integer = 0;
   args.num_args = GPR_ARRAY_SIZE(arg_array);
   args.args = arg_array;
diff --git a/test/core/compression/algorithm_test.c b/test/core/compression/algorithm_test.c
index 51f7d09984..879664ea70 100644
--- a/test/core/compression/algorithm_test.c
+++ b/test/core/compression/algorithm_test.c
@@ -37,7 +37,7 @@ static void test_algorithm_mesh(void) {
   gpr_log(GPR_DEBUG, "test_algorithm_mesh");
 
   for (i = 0; i < GRPC_COMPRESS_ALGORITHMS_COUNT; i++) {
-    char *name;
+    const char *name;
     grpc_compression_algorithm parsed;
     grpc_slice mdstr;
     grpc_mdelem mdelem;
diff --git a/test/core/compression/compression_test.c b/test/core/compression/compression_test.c
index 4b300e18d3..10f7f07a44 100644
--- a/test/core/compression/compression_test.c
+++ b/test/core/compression/compression_test.c
@@ -57,7 +57,7 @@ static void test_compression_algorithm_parse(void) {
 
 static void test_compression_algorithm_name(void) {
   int success;
-  char *name;
+  const char *name;
   size_t i;
   const char *valid_names[] = {"identity", "message/gzip", "message/deflate", "stream/gzip"};
   const grpc_compression_algorithm valid_algorithms[] = {
diff --git a/test/core/compression/message_compress_test.c b/test/core/compression/message_compress_test.c
index 4444b65802..55267f4aa8 100644
--- a/test/core/compression/message_compress_test.c
+++ b/test/core/compression/message_compress_test.c
@@ -49,7 +49,7 @@ static void assert_passthrough(grpc_slice value,
   grpc_slice_buffer output;
   grpc_slice final;
   int was_compressed;
-  char *algorithm_name;
+  const char *algorithm_name;
 
   GPR_ASSERT(grpc_message_compression_algorithm_name(algorithm, &algorithm_name) != 0);
   gpr_log(
diff --git a/test/core/compression/stream_compression_test.c b/test/core/compression/stream_compression_test.c
index e576507aaf..afed6cd6b5 100644
--- a/test/core/compression/stream_compression_test.c
+++ b/test/core/compression/stream_compression_test.c
@@ -59,10 +59,11 @@ static void test_stream_compression_simple_compress_decompress() {
   grpc_slice_buffer_init(&relay);
   grpc_slice_buffer_init(&sink);
   grpc_stream_compression_context *compress_ctx =
-      grpc_stream_compression_context_create(GRPC_STREAM_COMPRESSION_COMPRESS);
+      grpc_stream_compression_context_create(
+          GRPC_STREAM_COMPRESSION_GZIP_COMPRESS);
   grpc_stream_compression_context *decompress_ctx =
       grpc_stream_compression_context_create(
-          GRPC_STREAM_COMPRESSION_DECOMPRESS);
+          GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS);
   grpc_slice slice = grpc_slice_from_static_string(test_str);
   grpc_slice_buffer_add(&source, slice);
   GPR_ASSERT(grpc_stream_compress(compress_ctx, &source, &relay, NULL,
@@ -91,10 +92,11 @@ test_stream_compression_simple_compress_decompress_with_output_size_constraint()
   grpc_slice_buffer_init(&relay);
   grpc_slice_buffer_init(&sink);
   grpc_stream_compression_context *compress_ctx =
-      grpc_stream_compression_context_create(GRPC_STREAM_COMPRESSION_COMPRESS);
+      grpc_stream_compression_context_create(
+          GRPC_STREAM_COMPRESSION_GZIP_COMPRESS);
   grpc_stream_compression_context *decompress_ctx =
       grpc_stream_compression_context_create(
-          GRPC_STREAM_COMPRESSION_DECOMPRESS);
+          GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS);
   grpc_slice slice = grpc_slice_from_static_string(test_str);
   grpc_slice_buffer_add(&source, slice);
   GPR_ASSERT(grpc_stream_compress(compress_ctx, &source, &relay, NULL,
@@ -139,10 +141,11 @@ test_stream_compression_simple_compress_decompress_with_large_data() {
   grpc_slice_buffer_init(&relay);
   grpc_slice_buffer_init(&sink);
   grpc_stream_compression_context *compress_ctx =
-      grpc_stream_compression_context_create(GRPC_STREAM_COMPRESSION_COMPRESS);
+      grpc_stream_compression_context_create(
+          GRPC_STREAM_COMPRESSION_GZIP_COMPRESS);
   grpc_stream_compression_context *decompress_ctx =
       grpc_stream_compression_context_create(
-          GRPC_STREAM_COMPRESSION_DECOMPRESS);
+          GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS);
   grpc_slice slice = grpc_slice_from_static_string(test_str);
   grpc_slice_buffer_add(&source, slice);
   GPR_ASSERT(grpc_stream_compress(compress_ctx, &source, &relay, NULL,
@@ -172,7 +175,8 @@ static void test_stream_compression_drop_context() {
   grpc_slice_buffer_init(&relay);
   grpc_slice_buffer_init(&sink);
   grpc_stream_compression_context *compress_ctx =
-      grpc_stream_compression_context_create(GRPC_STREAM_COMPRESSION_COMPRESS);
+      grpc_stream_compression_context_create(
+          GRPC_STREAM_COMPRESSION_GZIP_COMPRESS);
   grpc_slice slice = grpc_slice_from_static_string(test_str);
   grpc_slice_buffer_add(&source, slice);
   GPR_ASSERT(grpc_stream_compress(compress_ctx, &source, &relay, NULL,
@@ -180,8 +184,8 @@ static void test_stream_compression_drop_context() {
                                   GRPC_STREAM_COMPRESSION_FLUSH_FINISH));
   grpc_stream_compression_context_destroy(compress_ctx);
 
-  compress_ctx =
-      grpc_stream_compression_context_create(GRPC_STREAM_COMPRESSION_COMPRESS);
+  compress_ctx = grpc_stream_compression_context_create(
+      GRPC_STREAM_COMPRESSION_GZIP_COMPRESS);
   slice = grpc_slice_from_static_string(test_str2);
   grpc_slice_buffer_add(&source, slice);
   GPR_ASSERT(grpc_stream_compress(compress_ctx, &source, &relay, NULL,
@@ -205,7 +209,7 @@ static void test_stream_compression_drop_context() {
 
   grpc_stream_compression_context *decompress_ctx =
       grpc_stream_compression_context_create(
-          GRPC_STREAM_COMPRESSION_DECOMPRESS);
+          GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS);
   bool end_of_context;
   size_t output_size;
   GPR_ASSERT(grpc_stream_decompress(decompress_ctx, &relay, &sink, &output_size,
@@ -219,7 +223,7 @@ static void test_stream_compression_drop_context() {
 
   grpc_slice_buffer_init(&sink);
   decompress_ctx = grpc_stream_compression_context_create(
-      GRPC_STREAM_COMPRESSION_DECOMPRESS);
+      GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS);
   GPR_ASSERT(grpc_stream_decompress(decompress_ctx, &relay, &sink, &output_size,
                                     ~(size_t)0, &end_of_context));
   GPR_ASSERT(end_of_context == true);
@@ -240,7 +244,8 @@ static void test_stream_compression_sync_flush() {
   grpc_slice_buffer_init(&relay);
   grpc_slice_buffer_init(&sink);
   grpc_stream_compression_context *compress_ctx =
-      grpc_stream_compression_context_create(GRPC_STREAM_COMPRESSION_COMPRESS);
+      grpc_stream_compression_context_create(
+          GRPC_STREAM_COMPRESSION_GZIP_COMPRESS);
   grpc_slice slice = grpc_slice_from_static_string(test_str);
   grpc_slice_buffer_add(&source, slice);
   GPR_ASSERT(grpc_stream_compress(compress_ctx, &source, &relay, NULL,
@@ -249,7 +254,7 @@ static void test_stream_compression_sync_flush() {
 
   grpc_stream_compression_context *decompress_ctx =
       grpc_stream_compression_context_create(
-          GRPC_STREAM_COMPRESSION_DECOMPRESS);
+          GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS);
   bool end_of_context;
   size_t output_size;
   GPR_ASSERT(grpc_stream_decompress(decompress_ctx, &relay, &sink, &output_size,
diff --git a/test/core/end2end/fixtures/proxy.c b/test/core/end2end/fixtures/proxy.c
index 9ad862728f..6a2d75da09 100644
--- a/test/core/end2end/fixtures/proxy.c
+++ b/test/core/end2end/fixtures/proxy.c
@@ -227,6 +227,10 @@ static void on_c2p_recv_msg(void *arg, int success) {
                                   new_closure(on_p2s_sent_close, pc), NULL);
       GPR_ASSERT(err == GRPC_CALL_OK);
     }
+  } else {
+    if (pc->c2p_msg != NULL) {
+      grpc_byte_buffer_destroy(pc->c2p_msg);
+    }
   }
 
   unrefpc(pc, "on_c2p_recv_msg");
diff --git a/test/core/end2end/tests/bad_ping.c b/test/core/end2end/tests/bad_ping.c
index 12aceda688..c97d11b306 100644
--- a/test/core/end2end/tests/bad_ping.c
+++ b/test/core/end2end/tests/bad_ping.c
@@ -66,18 +66,19 @@ static void end_test(grpc_end2end_test_fixture *f) {
 static void test_bad_ping(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f = config.create_fixture(NULL, NULL);
   cq_verifier *cqv = cq_verifier_create(f.cq);
-  grpc_arg client_a[] = {{.type = GRPC_ARG_INTEGER,
-                          .key = GRPC_ARG_HTTP2_MIN_TIME_BETWEEN_PINGS_MS,
-                          .value.integer = 0},
-                         {.type = GRPC_ARG_INTEGER,
-                          .key = GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA,
-                          .value.integer = 20},
-                         {.type = GRPC_ARG_INTEGER,
-                          .key = GRPC_ARG_HTTP2_BDP_PROBE,
-                          .value.integer = 0}};
+  grpc_arg client_a[] = {
+      {.type = GRPC_ARG_INTEGER,
+       .key = GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS,
+       .value.integer = 10},
+      {.type = GRPC_ARG_INTEGER,
+       .key = GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA,
+       .value.integer = 0},
+      {.type = GRPC_ARG_INTEGER,
+       .key = GRPC_ARG_HTTP2_BDP_PROBE,
+       .value.integer = 0}};
   grpc_arg server_a[] = {
       {.type = GRPC_ARG_INTEGER,
-       .key = GRPC_ARG_HTTP2_MIN_PING_INTERVAL_WITHOUT_DATA_MS,
+       .key = GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS,
        .value.integer = 300000 /* 5 minutes */},
       {.type = GRPC_ARG_INTEGER,
        .key = GRPC_ARG_HTTP2_MAX_PING_STRIKES,
diff --git a/test/core/end2end/tests/compressed_payload.c b/test/core/end2end/tests/compressed_payload.c
index e07199ac28..a11e24d3a1 100644
--- a/test/core/end2end/tests/compressed_payload.c
+++ b/test/core/end2end/tests/compressed_payload.c
@@ -151,6 +151,11 @@ static void request_for_disabled_algorithm(
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  error =
+      grpc_server_request_call(f.server, &s, &call_details,
+                               &request_metadata_recv, f.cq, f.cq, tag(101));
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
@@ -187,10 +192,6 @@ static void request_for_disabled_algorithm(
   error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
-  error =
-      grpc_server_request_call(f.server, &s, &call_details,
-                               &request_metadata_recv, f.cq, f.cq, tag(101));
-  GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(101), true);
   cq_verify(cqv);
 
@@ -228,7 +229,7 @@ static void request_for_disabled_algorithm(
   /* with a certain error */
   GPR_ASSERT(status == expected_error);
 
-  char *algo_name = NULL;
+  const char *algo_name = NULL;
   GPR_ASSERT(grpc_compression_algorithm_name(algorithm_to_disable, &algo_name));
   char *expected_details = NULL;
   gpr_asprintf(&expected_details, "Compression algorithm '%s' is disabled.",
diff --git a/test/core/end2end/tests/keepalive_timeout.c b/test/core/end2end/tests/keepalive_timeout.c
index e0ead4ab62..8d01f23c00 100644
--- a/test/core/end2end/tests/keepalive_timeout.c
+++ b/test/core/end2end/tests/keepalive_timeout.c
@@ -106,13 +106,13 @@ static void test_keepalive_timeout(grpc_end2end_test_config config) {
                                 .value.integer = 0},
                                {.type = GRPC_ARG_INTEGER,
                                 .key = GRPC_ARG_HTTP2_BDP_PROBE,
-                                .value.integer = 1}};
+                                .value.integer = 0}};
 
-  grpc_channel_args *client_args = NULL;
-  client_args = grpc_channel_args_copy_and_add(client_args, keepalive_args, 2);
+  grpc_channel_args client_args = {.num_args = GPR_ARRAY_SIZE(keepalive_args),
+                                   .args = keepalive_args};
 
   grpc_end2end_test_fixture f =
-      begin_test(config, "keepalive_timeout", client_args, NULL);
+      begin_test(config, "keepalive_timeout", &client_args, NULL);
   cq_verifier *cqv = cq_verifier_create(f.cq);
   grpc_op ops[6];
   grpc_op *op;
@@ -216,12 +216,6 @@ static void test_keepalive_timeout(grpc_end2end_test_config config) {
   grpc_byte_buffer_destroy(response_payload);
   grpc_byte_buffer_destroy(response_payload_recv);
 
-  if (client_args != NULL) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_exec_ctx_finish(&exec_ctx);
-  }
-
   end_test(&f);
   config.tear_down_data(&f);
 }
diff --git a/test/core/end2end/tests/ping.c b/test/core/end2end/tests/ping.c
index 112ad9d7d2..23c82569ba 100644
--- a/test/core/end2end/tests/ping.c
+++ b/test/core/end2end/tests/ping.c
@@ -37,15 +37,19 @@ static void test_ping(grpc_end2end_test_config config,
   grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
   int i;
 
-  grpc_arg client_a[] = {{.type = GRPC_ARG_INTEGER,
-                          .key = GRPC_ARG_HTTP2_MIN_TIME_BETWEEN_PINGS_MS,
-                          .value.integer = 0},
-                         {.type = GRPC_ARG_INTEGER,
-                          .key = GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA,
-                          .value.integer = 20}};
+  grpc_arg client_a[] = {
+      {.type = GRPC_ARG_INTEGER,
+       .key = GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS,
+       .value.integer = 10},
+      {.type = GRPC_ARG_INTEGER,
+       .key = GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA,
+       .value.integer = 0},
+      {.type = GRPC_ARG_INTEGER,
+       .key = GRPC_ARG_KEEPALIVE_PERMIT_WITHOUT_CALLS,
+       .value.integer = 1}};
   grpc_arg server_a[] = {
       {.type = GRPC_ARG_INTEGER,
-       .key = GRPC_ARG_HTTP2_MIN_PING_INTERVAL_WITHOUT_DATA_MS,
+       .key = GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS,
        .value.integer = 0},
       {.type = GRPC_ARG_INTEGER,
        .key = GRPC_ARG_KEEPALIVE_PERMIT_WITHOUT_CALLS,
diff --git a/test/core/end2end/tests/resource_quota_server.c b/test/core/end2end/tests/resource_quota_server.c
index 0316920762..93befeee0c 100644
--- a/test/core/end2end/tests/resource_quota_server.c
+++ b/test/core/end2end/tests/resource_quota_server.c
@@ -136,20 +136,20 @@ void resource_quota_server(grpc_end2end_test_config config) {
   grpc_call **server_calls =
       (grpc_call **)malloc(sizeof(grpc_call *) * NUM_CALLS);
   grpc_metadata_array *initial_metadata_recv =
-      malloc(sizeof(grpc_metadata_array) * NUM_CALLS);
+      (grpc_metadata_array *)malloc(sizeof(grpc_metadata_array) * NUM_CALLS);
   grpc_metadata_array *trailing_metadata_recv =
-      malloc(sizeof(grpc_metadata_array) * NUM_CALLS);
+      (grpc_metadata_array *)malloc(sizeof(grpc_metadata_array) * NUM_CALLS);
   grpc_metadata_array *request_metadata_recv =
-      malloc(sizeof(grpc_metadata_array) * NUM_CALLS);
+      (grpc_metadata_array *)malloc(sizeof(grpc_metadata_array) * NUM_CALLS);
   grpc_call_details *call_details =
-      malloc(sizeof(grpc_call_details) * NUM_CALLS);
+      (grpc_call_details *)malloc(sizeof(grpc_call_details) * NUM_CALLS);
   grpc_status_code *status =
       (grpc_status_code *)malloc(sizeof(grpc_status_code) * NUM_CALLS);
   grpc_slice *details = (grpc_slice *)malloc(sizeof(grpc_slice) * NUM_CALLS);
   grpc_byte_buffer **request_payload =
-      malloc(sizeof(grpc_byte_buffer *) * NUM_CALLS);
+      (grpc_byte_buffer **)malloc(sizeof(grpc_byte_buffer *) * NUM_CALLS);
   grpc_byte_buffer **request_payload_recv =
-      malloc(sizeof(grpc_byte_buffer *) * NUM_CALLS);
+      (grpc_byte_buffer **)malloc(sizeof(grpc_byte_buffer *) * NUM_CALLS);
   int *was_cancelled = (int *)malloc(sizeof(int) * NUM_CALLS);
   grpc_call_error error;
   int pending_client_calls = 0;
diff --git a/test/core/end2end/tests/simple_request.c b/test/core/end2end/tests/simple_request.c
index 82ab0a1cfe..7ce7e1f285 100644
--- a/test/core/end2end/tests/simple_request.c
+++ b/test/core/end2end/tests/simple_request.c
@@ -103,10 +103,10 @@ static void simple_request_body(grpc_end2end_test_config config,
   grpc_slice details;
   int was_cancelled = 2;
   char *peer;
-  grpc_stats_data before;
-  grpc_stats_data after;
+  grpc_stats_data *before = gpr_malloc(sizeof(grpc_stats_data));
+  grpc_stats_data *after = gpr_malloc(sizeof(grpc_stats_data));
 
-  grpc_stats_collect(&before);
+  grpc_stats_collect(before);
 
   gpr_timespec deadline = five_seconds_from_now();
   c = grpc_channel_create_call(
@@ -214,9 +214,9 @@ static void simple_request_body(grpc_end2end_test_config config,
 
   cq_verifier_destroy(cqv);
 
-  grpc_stats_collect(&after);
+  grpc_stats_collect(after);
 
-  char *stats = grpc_stats_data_as_json(&after);
+  char *stats = grpc_stats_data_as_json(after);
   gpr_log(GPR_DEBUG, "%s", stats);
   gpr_free(stats);
 
@@ -224,12 +224,14 @@ static void simple_request_body(grpc_end2end_test_config config,
   if (config.feature_mask & FEATURE_MASK_SUPPORTS_REQUEST_PROXYING) {
     expected_calls *= 2;
   }
-  GPR_ASSERT(after.counters[GRPC_STATS_COUNTER_CLIENT_CALLS_CREATED] -
-                 before.counters[GRPC_STATS_COUNTER_CLIENT_CALLS_CREATED] ==
+  GPR_ASSERT(after->counters[GRPC_STATS_COUNTER_CLIENT_CALLS_CREATED] -
+                 before->counters[GRPC_STATS_COUNTER_CLIENT_CALLS_CREATED] ==
              expected_calls);
-  GPR_ASSERT(after.counters[GRPC_STATS_COUNTER_SERVER_CALLS_CREATED] -
-                 before.counters[GRPC_STATS_COUNTER_SERVER_CALLS_CREATED] ==
+  GPR_ASSERT(after->counters[GRPC_STATS_COUNTER_SERVER_CALLS_CREATED] -
+                 before->counters[GRPC_STATS_COUNTER_SERVER_CALLS_CREATED] ==
              expected_calls);
+  gpr_free(before);
+  gpr_free(after);
 }
 
 static void test_invoke_simple_request(grpc_end2end_test_config config) {
diff --git a/test/core/end2end/tests/stream_compression_compressed_payload.c b/test/core/end2end/tests/stream_compression_compressed_payload.c
index 87c3183534..ce7598c508 100644
--- a/test/core/end2end/tests/stream_compression_compressed_payload.c
+++ b/test/core/end2end/tests/stream_compression_compressed_payload.c
@@ -151,6 +151,11 @@ static void request_for_disabled_algorithm(
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  error =
+      grpc_server_request_call(f.server, &s, &call_details,
+                               &request_metadata_recv, f.cq, f.cq, tag(101));
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
@@ -187,10 +192,6 @@ static void request_for_disabled_algorithm(
   error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
-  error =
-      grpc_server_request_call(f.server, &s, &call_details,
-                               &request_metadata_recv, f.cq, f.cq, tag(101));
-  GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(101), true);
   cq_verify(cqv);
 
@@ -228,7 +229,7 @@ static void request_for_disabled_algorithm(
   /* with a certain error */
   GPR_ASSERT(status == expected_error);
 
-  char *algo_name = NULL;
+  const char *algo_name = NULL;
   GPR_ASSERT(grpc_compression_algorithm_name(algorithm_to_disable, &algo_name));
   char *expected_details = NULL;
   gpr_asprintf(&expected_details,
diff --git a/test/core/http/httpcli_test.c b/test/core/http/httpcli_test.c
index b8b96d673c..8a53903763 100644
--- a/test/core/http/httpcli_test.c
+++ b/test/core/http/httpcli_test.c
@@ -52,7 +52,7 @@ 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(grpc_polling_entity_pollset(&g_pops), NULL)));
+      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&g_pops), NULL)));
   gpr_mu_unlock(g_mu);
 }
 
diff --git a/test/core/http/httpscli_test.c b/test/core/http/httpscli_test.c
index a9d7abdcff..c7455bd8df 100644
--- a/test/core/http/httpscli_test.c
+++ b/test/core/http/httpscli_test.c
@@ -52,7 +52,7 @@ 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(grpc_polling_entity_pollset(&g_pops), NULL)));
+      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&g_pops), NULL)));
   gpr_mu_unlock(g_mu);
 }
 
diff --git a/test/core/iomgr/endpoint_tests.c b/test/core/iomgr/endpoint_tests.c
index 895cc0e158..f8570edde7 100644
--- a/test/core/iomgr/endpoint_tests.c
+++ b/test/core/iomgr/endpoint_tests.c
@@ -126,7 +126,8 @@ 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(g_pollset, NULL));
+    GRPC_LOG_IF_ERROR("pollset_kick",
+                      grpc_pollset_kick(exec_ctx, g_pollset, NULL));
     gpr_mu_unlock(g_mu);
   } else if (error == GRPC_ERROR_NONE) {
     grpc_endpoint_read(exec_ctx, state->read_ep, &state->incoming,
@@ -162,7 +163,8 @@ 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(g_pollset, NULL));
+  GRPC_LOG_IF_ERROR("pollset_kick",
+                    grpc_pollset_kick(exec_ctx, g_pollset, NULL));
   gpr_mu_unlock(g_mu);
 }
 
@@ -254,7 +256,8 @@ static void inc_on_failure(grpc_exec_ctx *exec_ctx, 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(g_pollset, NULL)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("kick", grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
diff --git a/test/core/iomgr/fd_posix_test.c b/test/core/iomgr/fd_posix_test.c
index 5791d17af6..881277a8d6 100644
--- a/test/core/iomgr/fd_posix_test.c
+++ b/test/core/iomgr/fd_posix_test.c
@@ -178,8 +178,8 @@ static void listen_shutdown_cb(grpc_exec_ctx *exec_ctx, void *arg /*server */,
 
   gpr_mu_lock(g_mu);
   sv->done = 1;
-  GPR_ASSERT(
-      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
+                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
@@ -297,8 +297,8 @@ static void client_session_shutdown_cb(grpc_exec_ctx *exec_ctx,
   grpc_fd_orphan(exec_ctx, cl->em_fd, NULL, NULL, false /* already_closed */,
                  "c");
   cl->done = 1;
-  GPR_ASSERT(
-      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
+                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
 }
 
 /* Write as much as possible, then register notify_on_write. */
@@ -417,8 +417,8 @@ static void first_read_callback(grpc_exec_ctx *exec_ctx,
 
   gpr_mu_lock(g_mu);
   fdc->cb_that_ran = first_read_callback;
-  GPR_ASSERT(
-      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
+                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
@@ -429,8 +429,8 @@ static void second_read_callback(grpc_exec_ctx *exec_ctx,
 
   gpr_mu_lock(g_mu);
   fdc->cb_that_ran = second_read_callback;
-  GPR_ASSERT(
-      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
+                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
diff --git a/test/core/iomgr/pollset_set_test.c b/test/core/iomgr/pollset_set_test.c
index 5750ac0f4b..70efca8b16 100644
--- a/test/core/iomgr/pollset_set_test.c
+++ b/test/core/iomgr/pollset_set_test.c
@@ -24,6 +24,7 @@
 #include <string.h>
 #include <unistd.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
@@ -433,8 +434,7 @@ int main(int argc, char **argv) {
   const char *poll_strategy = grpc_get_poll_strategy_name();
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
-  grpc_iomgr_init(&exec_ctx);
-  grpc_iomgr_start(&exec_ctx);
+  grpc_init();
 
   if (poll_strategy != NULL &&
       (strcmp(poll_strategy, "epoll") == 0 ||
@@ -449,8 +449,8 @@ int main(int argc, char **argv) {
             poll_strategy);
   }
 
-  grpc_iomgr_shutdown(&exec_ctx);
   grpc_exec_ctx_finish(&exec_ctx);
+  grpc_shutdown();
   return 0;
 }
 #else /* defined(GRPC_LINUX_EPOLL) */
diff --git a/test/core/iomgr/resolve_address_test.c b/test/core/iomgr/resolve_address_test.c
index 7f5c4073d8..1110c04b6e 100644
--- a/test/core/iomgr/resolve_address_test.c
+++ b/test/core/iomgr/resolve_address_test.c
@@ -106,7 +106,8 @@ static void must_succeed(grpc_exec_ctx *exec_ctx, void *argsp,
   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(args->pollset, NULL));
+  GRPC_LOG_IF_ERROR("pollset_kick",
+                    grpc_pollset_kick(exec_ctx, args->pollset, NULL));
   gpr_mu_unlock(args->mu);
 }
 
@@ -115,7 +116,8 @@ static void must_fail(grpc_exec_ctx *exec_ctx, void *argsp, grpc_error *err) {
   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(args->pollset, NULL));
+  GRPC_LOG_IF_ERROR("pollset_kick",
+                    grpc_pollset_kick(exec_ctx, args->pollset, NULL));
   gpr_mu_unlock(args->mu);
 }
 
diff --git a/test/core/iomgr/tcp_client_posix_test.c b/test/core/iomgr/tcp_client_posix_test.c
index 00ea495bbe..1032da942b 100644
--- a/test/core/iomgr/tcp_client_posix_test.c
+++ b/test/core/iomgr/tcp_client_posix_test.c
@@ -53,8 +53,10 @@ static gpr_timespec test_deadline(void) {
 static void finish_connection() {
   gpr_mu_lock(g_mu);
   g_connections_complete++;
-  GPR_ASSERT(
-      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
+                               grpc_pollset_kick(&exec_ctx, g_pollset, NULL)));
+  grpc_exec_ctx_finish(&exec_ctx);
   gpr_mu_unlock(g_mu);
 }
 
diff --git a/test/core/iomgr/tcp_client_uv_test.c b/test/core/iomgr/tcp_client_uv_test.c
index 9927356613..0f1db4705b 100644
--- a/test/core/iomgr/tcp_client_uv_test.c
+++ b/test/core/iomgr/tcp_client_uv_test.c
@@ -46,11 +46,11 @@ static gpr_timespec test_deadline(void) {
   return grpc_timeout_seconds_to_deadline(10);
 }
 
-static void finish_connection() {
+static void finish_connection(grpc_exec_ctx *exec_ctx) {
   gpr_mu_lock(g_mu);
   g_connections_complete++;
-  GPR_ASSERT(
-      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
+                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
@@ -63,13 +63,13 @@ static void must_succeed(grpc_exec_ctx *exec_ctx, void *arg,
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("must_succeed called"));
   grpc_endpoint_destroy(exec_ctx, g_connecting);
   g_connecting = NULL;
-  finish_connection();
+  finish_connection(exec_ctx);
 }
 
 static void must_fail(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   GPR_ASSERT(g_connecting == NULL);
   GPR_ASSERT(error != GRPC_ERROR_NONE);
-  finish_connection();
+  finish_connection(exec_ctx);
 }
 
 static void close_cb(uv_handle_t *handle) { gpr_free(handle); }
diff --git a/test/core/iomgr/tcp_posix_test.c b/test/core/iomgr/tcp_posix_test.c
index cdaa2ce2af..cfb3cf897c 100644
--- a/test/core/iomgr/tcp_posix_test.c
+++ b/test/core/iomgr/tcp_posix_test.c
@@ -147,7 +147,8 @@ 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(g_pollset, NULL)));
+    GPR_ASSERT(GRPC_LOG_IF_ERROR("kick",
+                                 grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
     gpr_mu_unlock(g_mu);
   } else {
     grpc_endpoint_read(exec_ctx, state->ep, &state->incoming, &state->read_cb);
@@ -295,8 +296,8 @@ static void write_done(grpc_exec_ctx *exec_ctx,
   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(g_pollset, NULL)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
+                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
@@ -406,8 +407,8 @@ static void write_test(size_t num_bytes, size_t slice_size) {
 void on_fd_released(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *errors) {
   int *done = (int *)arg;
   *done = 1;
-  GPR_ASSERT(
-      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
+                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
 }
 
 /* Do a read_test, then release fd and try to read/write again. Verify that
diff --git a/test/core/iomgr/tcp_server_posix_test.c b/test/core/iomgr/tcp_server_posix_test.c
index 2371721a60..4d84608376 100644
--- a/test/core/iomgr/tcp_server_posix_test.c
+++ b/test/core/iomgr/tcp_server_posix_test.c
@@ -159,8 +159,8 @@ 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(g_pollset, NULL)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
+                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
diff --git a/test/core/iomgr/tcp_server_uv_test.c b/test/core/iomgr/tcp_server_uv_test.c
index 8f4d553d1e..bd8ccb4f60 100644
--- a/test/core/iomgr/tcp_server_uv_test.c
+++ b/test/core/iomgr/tcp_server_uv_test.c
@@ -111,8 +111,8 @@ 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(g_pollset, NULL)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
+                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
diff --git a/test/core/iomgr/udp_server_test.c b/test/core/iomgr/udp_server_test.c
index aa34857dbd..1d051bea62 100644
--- a/test/core/iomgr/udp_server_test.c
+++ b/test/core/iomgr/udp_server_test.c
@@ -61,8 +61,8 @@ static void 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(g_pollset, NULL)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
+                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
@@ -70,8 +70,8 @@ static void on_write(grpc_exec_ctx *exec_ctx, grpc_fd *emfd, void *user_data) {
   gpr_mu_lock(g_mu);
   g_number_of_writes++;
 
-  GPR_ASSERT(
-      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
+                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
diff --git a/test/core/security/oauth2_utils.c b/test/core/security/oauth2_utils.c
index fdbc6ea741..d240403a29 100644
--- a/test/core/security/oauth2_utils.c
+++ b/test/core/security/oauth2_utils.c
@@ -60,7 +60,8 @@ static void on_oauth2_response(grpc_exec_ctx *exec_ctx, void *arg,
   request->token = token;
   GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(grpc_polling_entity_pollset(&request->pops), NULL));
+      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&request->pops),
+                        NULL));
   gpr_mu_unlock(request->mu);
 }
 
diff --git a/test/core/security/print_google_default_creds_token.c b/test/core/security/print_google_default_creds_token.c
index e1385a80ca..3144717a85 100644
--- a/test/core/security/print_google_default_creds_token.c
+++ b/test/core/security/print_google_default_creds_token.c
@@ -57,7 +57,8 @@ 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(grpc_polling_entity_pollset(&sync->pops), NULL));
+      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&sync->pops),
+                        NULL));
   gpr_mu_unlock(sync->mu);
 }
 
diff --git a/test/core/security/verify_jwt.c b/test/core/security/verify_jwt.c
index 259038f4d6..5faa6352a8 100644
--- a/test/core/security/verify_jwt.c
+++ b/test/core/security/verify_jwt.c
@@ -66,7 +66,8 @@ 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(sync->pollset, NULL));
+  GRPC_LOG_IF_ERROR("pollset_kick",
+                    grpc_pollset_kick(exec_ctx, sync->pollset, NULL));
   gpr_mu_unlock(sync->mu);
 }
 
diff --git a/test/core/surface/concurrent_connectivity_test.c b/test/core/surface/concurrent_connectivity_test.c
index 08079b6091..ec2cd8610b 100644
--- a/test/core/surface/concurrent_connectivity_test.c
+++ b/test/core/surface/concurrent_connectivity_test.c
@@ -108,7 +108,8 @@ static void on_connect(grpc_exec_ctx *exec_ctx, void *vargs, grpc_endpoint *tcp,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Connected"));
   grpc_endpoint_destroy(exec_ctx, tcp);
   gpr_mu_lock(args->mu);
-  GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(args->pollset, NULL));
+  GRPC_LOG_IF_ERROR("pollset_kick",
+                    grpc_pollset_kick(exec_ctx, args->pollset, NULL));
   gpr_mu_unlock(args->mu);
 }
 
diff --git a/test/core/surface/public_headers_must_be_c89.c b/test/core/surface/public_headers_must_be_c89.c
index 0d7f68c0ad..d36d116afb 100644
--- a/test/core/surface/public_headers_must_be_c89.c
+++ b/test/core/surface/public_headers_must_be_c89.c
@@ -24,6 +24,7 @@
 #include <grpc/grpc_security.h>
 #include <grpc/grpc_security_constants.h>
 #include <grpc/impl/codegen/atm.h>
+#include <grpc/impl/codegen/byte_buffer.h>
 #include <grpc/impl/codegen/byte_buffer_reader.h>
 #include <grpc/impl/codegen/compression_types.h>
 #include <grpc/impl/codegen/connectivity_state.h>
diff --git a/test/core/tsi/ssl_transport_security_test.c b/test/core/tsi/ssl_transport_security_test.c
index 364dfa1b73..2399b054b1 100644
--- a/test/core/tsi/ssl_transport_security_test.c
+++ b/test/core/tsi/ssl_transport_security_test.c
@@ -23,7 +23,9 @@
 #include "src/core/lib/iomgr/load_file.h"
 #include "src/core/lib/security/transport/security_connector.h"
 #include "src/core/tsi/ssl_transport_security.h"
+#include "src/core/tsi/transport_security.h"
 #include "src/core/tsi/transport_security_adapter.h"
+#include "src/core/tsi/transport_security_interface.h"
 #include "test/core/tsi/transport_security_test_lib.h"
 #include "test/core/util/test_config.h"
 
@@ -312,10 +314,10 @@ static void ssl_test_destruct(tsi_test_fixture *fixture) {
       key_cert_lib->bad_client_pem_key_cert_pair);
   gpr_free(key_cert_lib->root_cert);
   gpr_free(key_cert_lib);
-  /* Destroy others. */
-  tsi_ssl_server_handshaker_factory_destroy(
+  /* Unreference others. */
+  tsi_ssl_server_handshaker_factory_unref(
       ssl_fixture->server_handshaker_factory);
-  tsi_ssl_client_handshaker_factory_destroy(
+  tsi_ssl_client_handshaker_factory_unref(
       ssl_fixture->client_handshaker_factory);
 }
 
@@ -536,6 +538,118 @@ void ssl_tsi_test_do_round_trip_odd_buffer_size() {
   }
 }
 
+static const tsi_ssl_handshaker_factory_vtable *original_vtable;
+static bool handshaker_factory_destructor_called;
+
+static void ssl_tsi_test_handshaker_factory_destructor(
+    tsi_ssl_handshaker_factory *factory) {
+  GPR_ASSERT(factory != NULL);
+  handshaker_factory_destructor_called = true;
+  if (original_vtable != NULL && original_vtable->destroy != NULL) {
+    original_vtable->destroy(factory);
+  }
+}
+
+static tsi_ssl_handshaker_factory_vtable test_handshaker_factory_vtable = {
+    ssl_tsi_test_handshaker_factory_destructor};
+
+void test_tsi_ssl_client_handshaker_factory_refcounting() {
+  int i;
+  const char *cert_chain =
+      load_file(SSL_TSI_TEST_CREDENTIALS_DIR, "client.pem");
+
+  tsi_ssl_client_handshaker_factory *client_handshaker_factory;
+  GPR_ASSERT(tsi_create_ssl_client_handshaker_factory(
+                 NULL, cert_chain, NULL, NULL, 0, &client_handshaker_factory) ==
+             TSI_OK);
+
+  handshaker_factory_destructor_called = false;
+  original_vtable = tsi_ssl_handshaker_factory_swap_vtable(
+      (tsi_ssl_handshaker_factory *)client_handshaker_factory,
+      &test_handshaker_factory_vtable);
+
+  tsi_handshaker *handshaker[3];
+
+  for (i = 0; i < 3; ++i) {
+    GPR_ASSERT(tsi_ssl_client_handshaker_factory_create_handshaker(
+                   client_handshaker_factory, "google.com", &handshaker[i]) ==
+               TSI_OK);
+  }
+
+  tsi_handshaker_destroy(handshaker[1]);
+  GPR_ASSERT(!handshaker_factory_destructor_called);
+
+  tsi_handshaker_destroy(handshaker[0]);
+  GPR_ASSERT(!handshaker_factory_destructor_called);
+
+  tsi_ssl_client_handshaker_factory_unref(client_handshaker_factory);
+  GPR_ASSERT(!handshaker_factory_destructor_called);
+
+  tsi_handshaker_destroy(handshaker[2]);
+  GPR_ASSERT(handshaker_factory_destructor_called);
+
+  gpr_free((void *)cert_chain);
+}
+
+void test_tsi_ssl_server_handshaker_factory_refcounting() {
+  int i;
+  tsi_ssl_server_handshaker_factory *server_handshaker_factory;
+  tsi_handshaker *handshaker[3];
+  const char *cert_chain =
+      load_file(SSL_TSI_TEST_CREDENTIALS_DIR, "server0.pem");
+  tsi_ssl_pem_key_cert_pair cert_pair;
+
+  cert_pair.cert_chain = cert_chain;
+  cert_pair.private_key =
+      load_file(SSL_TSI_TEST_CREDENTIALS_DIR, "server0.key");
+
+  GPR_ASSERT(tsi_create_ssl_server_handshaker_factory(
+                 &cert_pair, 1, cert_chain, 0, NULL, NULL, 0,
+                 &server_handshaker_factory) == TSI_OK);
+
+  handshaker_factory_destructor_called = false;
+  original_vtable = tsi_ssl_handshaker_factory_swap_vtable(
+      (tsi_ssl_handshaker_factory *)server_handshaker_factory,
+      &test_handshaker_factory_vtable);
+
+  for (i = 0; i < 3; ++i) {
+    GPR_ASSERT(tsi_ssl_server_handshaker_factory_create_handshaker(
+                   server_handshaker_factory, &handshaker[i]) == TSI_OK);
+  }
+
+  tsi_handshaker_destroy(handshaker[1]);
+  GPR_ASSERT(!handshaker_factory_destructor_called);
+
+  tsi_handshaker_destroy(handshaker[0]);
+  GPR_ASSERT(!handshaker_factory_destructor_called);
+
+  tsi_ssl_server_handshaker_factory_unref(server_handshaker_factory);
+  GPR_ASSERT(!handshaker_factory_destructor_called);
+
+  tsi_handshaker_destroy(handshaker[2]);
+  GPR_ASSERT(handshaker_factory_destructor_called);
+
+  ssl_test_pem_key_cert_pair_destroy(cert_pair);
+}
+
+/* Attempting to create a handshaker factory with invalid parameters should fail
+ * but not crash. */
+void test_tsi_ssl_client_handshaker_factory_bad_params() {
+  const char *cert_chain = "This is not a valid PEM file.";
+
+  tsi_ssl_client_handshaker_factory *client_handshaker_factory;
+  GPR_ASSERT(tsi_create_ssl_client_handshaker_factory(
+                 NULL, cert_chain, NULL, NULL, 0, &client_handshaker_factory) ==
+             TSI_INVALID_ARGUMENT);
+  tsi_ssl_client_handshaker_factory_unref(client_handshaker_factory);
+}
+
+void ssl_tsi_test_handshaker_factory_internals() {
+  test_tsi_ssl_client_handshaker_factory_refcounting();
+  test_tsi_ssl_server_handshaker_factory_refcounting();
+  test_tsi_ssl_client_handshaker_factory_bad_params();
+}
+
 int main(int argc, char **argv) {
   grpc_test_init(argc, argv);
   grpc_init();
@@ -553,6 +667,7 @@ int main(int argc, char **argv) {
   ssl_tsi_test_do_handshake_alpn_client_server_ok();
   ssl_tsi_test_do_round_trip_for_all_configs();
   ssl_tsi_test_do_round_trip_odd_buffer_size();
+  ssl_tsi_test_handshaker_factory_internals();
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/util/port_server_client.c b/test/core/util/port_server_client.c
index 851c50941e..ba4028dbee 100644
--- a/test/core/util/port_server_client.c
+++ b/test/core/util/port_server_client.c
@@ -54,7 +54,8 @@ static void freed_port_from_server(grpc_exec_ctx *exec_ctx, void *arg,
   pr->done = 1;
   GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(grpc_polling_entity_pollset(&pr->pops), NULL));
+      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&pr->pops),
+                        NULL));
   gpr_mu_unlock(pr->mu);
 }
 
@@ -153,7 +154,8 @@ 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(grpc_polling_entity_pollset(&pr->pops), NULL));
+          grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&pr->pops),
+                            NULL));
       gpr_mu_unlock(pr->mu);
       return;
     }
@@ -189,7 +191,8 @@ 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(grpc_polling_entity_pollset(&pr->pops), NULL));
+      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&pr->pops),
+                        NULL));
   gpr_mu_unlock(pr->mu);
 }
 
diff --git a/test/cpp/codegen/compiler_test_golden b/test/cpp/codegen/compiler_test_golden
index b43c27f3f7..3d664e8825 100644
--- a/test/cpp/codegen/compiler_test_golden
+++ b/test/cpp/codegen/compiler_test_golden
@@ -65,6 +65,9 @@ class ServiceA final {
     std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>> AsyncMethodA1(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) {
       return std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>>(AsyncMethodA1Raw(context, request, cq));
     }
+    std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>> PrepareAsyncMethodA1(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>>(PrepareAsyncMethodA1Raw(context, request, cq));
+    }
     // MethodA1 trailing comment 1
     // MethodA2 detached leading comment 1
     //
@@ -76,6 +79,9 @@ class ServiceA final {
     std::unique_ptr< ::grpc::ClientAsyncWriterInterface< ::grpc::testing::Request>> AsyncMethodA2(::grpc::ClientContext* context, ::grpc::testing::Response* response, ::grpc::CompletionQueue* cq, void* tag) {
       return std::unique_ptr< ::grpc::ClientAsyncWriterInterface< ::grpc::testing::Request>>(AsyncMethodA2Raw(context, response, cq, tag));
     }
+    std::unique_ptr< ::grpc::ClientAsyncWriterInterface< ::grpc::testing::Request>> PrepareAsyncMethodA2(::grpc::ClientContext* context, ::grpc::testing::Response* response, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncWriterInterface< ::grpc::testing::Request>>(PrepareAsyncMethodA2Raw(context, response, cq));
+    }
     // MethodA2 trailing comment 1
     // Method A3 leading comment 1
     std::unique_ptr< ::grpc::ClientReaderInterface< ::grpc::testing::Response>> MethodA3(::grpc::ClientContext* context, const ::grpc::testing::Request& request) {
@@ -84,6 +90,9 @@ class ServiceA final {
     std::unique_ptr< ::grpc::ClientAsyncReaderInterface< ::grpc::testing::Response>> AsyncMethodA3(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq, void* tag) {
       return std::unique_ptr< ::grpc::ClientAsyncReaderInterface< ::grpc::testing::Response>>(AsyncMethodA3Raw(context, request, cq, tag));
     }
+    std::unique_ptr< ::grpc::ClientAsyncReaderInterface< ::grpc::testing::Response>> PrepareAsyncMethodA3(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncReaderInterface< ::grpc::testing::Response>>(PrepareAsyncMethodA3Raw(context, request, cq));
+    }
     // Method A3 trailing comment 1
     // Method A4 leading comment 1
     std::unique_ptr< ::grpc::ClientReaderWriterInterface< ::grpc::testing::Request, ::grpc::testing::Response>> MethodA4(::grpc::ClientContext* context) {
@@ -92,15 +101,22 @@ class ServiceA final {
     std::unique_ptr< ::grpc::ClientAsyncReaderWriterInterface< ::grpc::testing::Request, ::grpc::testing::Response>> AsyncMethodA4(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq, void* tag) {
       return std::unique_ptr< ::grpc::ClientAsyncReaderWriterInterface< ::grpc::testing::Request, ::grpc::testing::Response>>(AsyncMethodA4Raw(context, cq, tag));
     }
+    std::unique_ptr< ::grpc::ClientAsyncReaderWriterInterface< ::grpc::testing::Request, ::grpc::testing::Response>> PrepareAsyncMethodA4(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncReaderWriterInterface< ::grpc::testing::Request, ::grpc::testing::Response>>(PrepareAsyncMethodA4Raw(context, cq));
+    }
     // Method A4 trailing comment 1
   private:
     virtual ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>* AsyncMethodA1Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) = 0;
+    virtual ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>* PrepareAsyncMethodA1Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) = 0;
     virtual ::grpc::ClientWriterInterface< ::grpc::testing::Request>* MethodA2Raw(::grpc::ClientContext* context, ::grpc::testing::Response* response) = 0;
     virtual ::grpc::ClientAsyncWriterInterface< ::grpc::testing::Request>* AsyncMethodA2Raw(::grpc::ClientContext* context, ::grpc::testing::Response* response, ::grpc::CompletionQueue* cq, void* tag) = 0;
+    virtual ::grpc::ClientAsyncWriterInterface< ::grpc::testing::Request>* PrepareAsyncMethodA2Raw(::grpc::ClientContext* context, ::grpc::testing::Response* response, ::grpc::CompletionQueue* cq) = 0;
     virtual ::grpc::ClientReaderInterface< ::grpc::testing::Response>* MethodA3Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request) = 0;
     virtual ::grpc::ClientAsyncReaderInterface< ::grpc::testing::Response>* AsyncMethodA3Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq, void* tag) = 0;
+    virtual ::grpc::ClientAsyncReaderInterface< ::grpc::testing::Response>* PrepareAsyncMethodA3Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) = 0;
     virtual ::grpc::ClientReaderWriterInterface< ::grpc::testing::Request, ::grpc::testing::Response>* MethodA4Raw(::grpc::ClientContext* context) = 0;
     virtual ::grpc::ClientAsyncReaderWriterInterface< ::grpc::testing::Request, ::grpc::testing::Response>* AsyncMethodA4Raw(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq, void* tag) = 0;
+    virtual ::grpc::ClientAsyncReaderWriterInterface< ::grpc::testing::Request, ::grpc::testing::Response>* PrepareAsyncMethodA4Raw(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq) = 0;
   };
   class Stub final : public StubInterface {
    public:
@@ -109,34 +125,50 @@ class ServiceA final {
     std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::grpc::testing::Response>> AsyncMethodA1(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) {
       return std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::grpc::testing::Response>>(AsyncMethodA1Raw(context, request, cq));
     }
+    std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::grpc::testing::Response>> PrepareAsyncMethodA1(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::grpc::testing::Response>>(PrepareAsyncMethodA1Raw(context, request, cq));
+    }
     std::unique_ptr< ::grpc::ClientWriter< ::grpc::testing::Request>> MethodA2(::grpc::ClientContext* context, ::grpc::testing::Response* response) {
       return std::unique_ptr< ::grpc::ClientWriter< ::grpc::testing::Request>>(MethodA2Raw(context, response));
     }
     std::unique_ptr< ::grpc::ClientAsyncWriter< ::grpc::testing::Request>> AsyncMethodA2(::grpc::ClientContext* context, ::grpc::testing::Response* response, ::grpc::CompletionQueue* cq, void* tag) {
       return std::unique_ptr< ::grpc::ClientAsyncWriter< ::grpc::testing::Request>>(AsyncMethodA2Raw(context, response, cq, tag));
     }
+    std::unique_ptr< ::grpc::ClientAsyncWriter< ::grpc::testing::Request>> PrepareAsyncMethodA2(::grpc::ClientContext* context, ::grpc::testing::Response* response, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncWriter< ::grpc::testing::Request>>(PrepareAsyncMethodA2Raw(context, response, cq));
+    }
     std::unique_ptr< ::grpc::ClientReader< ::grpc::testing::Response>> MethodA3(::grpc::ClientContext* context, const ::grpc::testing::Request& request) {
       return std::unique_ptr< ::grpc::ClientReader< ::grpc::testing::Response>>(MethodA3Raw(context, request));
     }
     std::unique_ptr< ::grpc::ClientAsyncReader< ::grpc::testing::Response>> AsyncMethodA3(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq, void* tag) {
       return std::unique_ptr< ::grpc::ClientAsyncReader< ::grpc::testing::Response>>(AsyncMethodA3Raw(context, request, cq, tag));
     }
+    std::unique_ptr< ::grpc::ClientAsyncReader< ::grpc::testing::Response>> PrepareAsyncMethodA3(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncReader< ::grpc::testing::Response>>(PrepareAsyncMethodA3Raw(context, request, cq));
+    }
     std::unique_ptr< ::grpc::ClientReaderWriter< ::grpc::testing::Request, ::grpc::testing::Response>> MethodA4(::grpc::ClientContext* context) {
       return std::unique_ptr< ::grpc::ClientReaderWriter< ::grpc::testing::Request, ::grpc::testing::Response>>(MethodA4Raw(context));
     }
     std::unique_ptr<  ::grpc::ClientAsyncReaderWriter< ::grpc::testing::Request, ::grpc::testing::Response>> AsyncMethodA4(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq, void* tag) {
       return std::unique_ptr< ::grpc::ClientAsyncReaderWriter< ::grpc::testing::Request, ::grpc::testing::Response>>(AsyncMethodA4Raw(context, cq, tag));
     }
+    std::unique_ptr<  ::grpc::ClientAsyncReaderWriter< ::grpc::testing::Request, ::grpc::testing::Response>> PrepareAsyncMethodA4(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncReaderWriter< ::grpc::testing::Request, ::grpc::testing::Response>>(PrepareAsyncMethodA4Raw(context, cq));
+    }
 
    private:
     std::shared_ptr< ::grpc::ChannelInterface> channel_;
     ::grpc::ClientAsyncResponseReader< ::grpc::testing::Response>* AsyncMethodA1Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) override;
+    ::grpc::ClientAsyncResponseReader< ::grpc::testing::Response>* PrepareAsyncMethodA1Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) override;
     ::grpc::ClientWriter< ::grpc::testing::Request>* MethodA2Raw(::grpc::ClientContext* context, ::grpc::testing::Response* response) override;
     ::grpc::ClientAsyncWriter< ::grpc::testing::Request>* AsyncMethodA2Raw(::grpc::ClientContext* context, ::grpc::testing::Response* response, ::grpc::CompletionQueue* cq, void* tag) override;
+    ::grpc::ClientAsyncWriter< ::grpc::testing::Request>* PrepareAsyncMethodA2Raw(::grpc::ClientContext* context, ::grpc::testing::Response* response, ::grpc::CompletionQueue* cq) override;
     ::grpc::ClientReader< ::grpc::testing::Response>* MethodA3Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request) override;
     ::grpc::ClientAsyncReader< ::grpc::testing::Response>* AsyncMethodA3Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq, void* tag) override;
+    ::grpc::ClientAsyncReader< ::grpc::testing::Response>* PrepareAsyncMethodA3Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) override;
     ::grpc::ClientReaderWriter< ::grpc::testing::Request, ::grpc::testing::Response>* MethodA4Raw(::grpc::ClientContext* context) override;
     ::grpc::ClientAsyncReaderWriter< ::grpc::testing::Request, ::grpc::testing::Response>* AsyncMethodA4Raw(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq, void* tag) override;
+    ::grpc::ClientAsyncReaderWriter< ::grpc::testing::Request, ::grpc::testing::Response>* PrepareAsyncMethodA4Raw(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq) override;
     const ::grpc::RpcMethod rpcmethod_MethodA1_;
     const ::grpc::RpcMethod rpcmethod_MethodA2_;
     const ::grpc::RpcMethod rpcmethod_MethodA3_;
@@ -372,9 +404,13 @@ class ServiceB final {
     std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>> AsyncMethodB1(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) {
       return std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>>(AsyncMethodB1Raw(context, request, cq));
     }
+    std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>> PrepareAsyncMethodB1(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>>(PrepareAsyncMethodB1Raw(context, request, cq));
+    }
     // MethodB1 trailing comment 1
   private:
     virtual ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>* AsyncMethodB1Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) = 0;
+    virtual ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>* PrepareAsyncMethodB1Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) = 0;
   };
   class Stub final : public StubInterface {
    public:
@@ -383,10 +419,14 @@ class ServiceB final {
     std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::grpc::testing::Response>> AsyncMethodB1(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) {
       return std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::grpc::testing::Response>>(AsyncMethodB1Raw(context, request, cq));
     }
+    std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::grpc::testing::Response>> PrepareAsyncMethodB1(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::grpc::testing::Response>>(PrepareAsyncMethodB1Raw(context, request, cq));
+    }
 
    private:
     std::shared_ptr< ::grpc::ChannelInterface> channel_;
     ::grpc::ClientAsyncResponseReader< ::grpc::testing::Response>* AsyncMethodB1Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) override;
+    ::grpc::ClientAsyncResponseReader< ::grpc::testing::Response>* PrepareAsyncMethodB1Raw(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq) override;
     const ::grpc::RpcMethod rpcmethod_MethodB1_;
   };
   static std::unique_ptr<Stub> NewStub(const std::shared_ptr< ::grpc::ChannelInterface>& channel, const ::grpc::StubOptions& options = ::grpc::StubOptions());
diff --git a/test/cpp/codegen/compiler_test_mock_golden b/test/cpp/codegen/compiler_test_mock_golden
index 8e4b4d5911..f97c2dd83a 100644
--- a/test/cpp/codegen/compiler_test_mock_golden
+++ b/test/cpp/codegen/compiler_test_mock_golden
@@ -15,18 +15,23 @@ class MockServiceAStub : public ServiceA::StubInterface {
  public:
   MOCK_METHOD3(MethodA1, ::grpc::Status(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::testing::Response* response));
   MOCK_METHOD3(AsyncMethodA1Raw, ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>*(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq));
+  MOCK_METHOD3(PrepareAsyncMethodA1Raw, ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>*(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq));
   MOCK_METHOD2(MethodA2Raw, ::grpc::ClientWriterInterface< ::grpc::testing::Request>*(::grpc::ClientContext* context, ::grpc::testing::Response* response));
   MOCK_METHOD4(AsyncMethodA2Raw, ::grpc::ClientAsyncWriterInterface< ::grpc::testing::Request>*(::grpc::ClientContext* context, ::grpc::testing::Response* response, ::grpc::CompletionQueue* cq, void* tag));
+  MOCK_METHOD3(PrepareAsyncMethodA2Raw, ::grpc::ClientAsyncWriterInterface< ::grpc::testing::Request>*(::grpc::ClientContext* context, ::grpc::testing::Response* response, ::grpc::CompletionQueue* cq));
   MOCK_METHOD2(MethodA3Raw, ::grpc::ClientReaderInterface< ::grpc::testing::Response>*(::grpc::ClientContext* context, const ::grpc::testing::Request& request));
   MOCK_METHOD4(AsyncMethodA3Raw, ::grpc::ClientAsyncReaderInterface< ::grpc::testing::Response>*(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq, void* tag));
+  MOCK_METHOD3(PrepareAsyncMethodA3Raw, ::grpc::ClientAsyncReaderInterface< ::grpc::testing::Response>*(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq));
   MOCK_METHOD1(MethodA4Raw, ::grpc::ClientReaderWriterInterface< ::grpc::testing::Request, ::grpc::testing::Response>*(::grpc::ClientContext* context));
   MOCK_METHOD3(AsyncMethodA4Raw, ::grpc::ClientAsyncReaderWriterInterface<::grpc::testing::Request, ::grpc::testing::Response>*(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq, void* tag));
+  MOCK_METHOD2(PrepareAsyncMethodA4Raw, ::grpc::ClientAsyncReaderWriterInterface<::grpc::testing::Request, ::grpc::testing::Response>*(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq));
 };
 
 class MockServiceBStub : public ServiceB::StubInterface {
  public:
   MOCK_METHOD3(MethodB1, ::grpc::Status(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::testing::Response* response));
   MOCK_METHOD3(AsyncMethodB1Raw, ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>*(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq));
+  MOCK_METHOD3(PrepareAsyncMethodB1Raw, ::grpc::ClientAsyncResponseReaderInterface< ::grpc::testing::Response>*(::grpc::ClientContext* context, const ::grpc::testing::Request& request, ::grpc::CompletionQueue* cq));
 };
 
 } // namespace grpc
diff --git a/test/cpp/end2end/generic_end2end_test.cc b/test/cpp/end2end/generic_end2end_test.cc
index b9e6e18ca7..33b35108d2 100644
--- a/test/cpp/end2end/generic_end2end_test.cc
+++ b/test/cpp/end2end/generic_end2end_test.cc
@@ -196,6 +196,62 @@ TEST_F(GenericEnd2endTest, SequentialRpcs) {
   SendRpc(10);
 }
 
+TEST_F(GenericEnd2endTest, SequentialUnaryRpcs) {
+  ResetStub();
+  const int num_rpcs = 10;
+  const grpc::string kMethodName("/grpc.cpp.test.util.EchoTestService/Echo");
+  for (int i = 0; i < num_rpcs; i++) {
+    EchoRequest send_request;
+    EchoRequest recv_request;
+    EchoResponse send_response;
+    EchoResponse recv_response;
+    Status recv_status;
+
+    ClientContext cli_ctx;
+    GenericServerContext srv_ctx;
+    GenericServerAsyncReaderWriter stream(&srv_ctx);
+
+    // The string needs to be long enough to test heap-based slice.
+    send_request.set_message("Hello world. Hello world. Hello world.");
+
+    std::unique_ptr<ByteBuffer> cli_send_buffer =
+        SerializeToByteBuffer(&send_request);
+    std::unique_ptr<GenericClientAsyncResponseReader> call =
+        generic_stub_->PrepareUnaryCall(&cli_ctx, kMethodName,
+                                        *cli_send_buffer.get(), &cli_cq_);
+    call->StartCall();
+    ByteBuffer cli_recv_buffer;
+    call->Finish(&cli_recv_buffer, &recv_status, tag(1));
+
+    generic_service_.RequestCall(&srv_ctx, &stream, srv_cq_.get(),
+                                 srv_cq_.get(), tag(4));
+
+    verify_ok(srv_cq_.get(), 4, true);
+    EXPECT_EQ(server_host_, srv_ctx.host().substr(0, server_host_.length()));
+    EXPECT_EQ(kMethodName, srv_ctx.method());
+
+    ByteBuffer srv_recv_buffer;
+    stream.Read(&srv_recv_buffer, tag(5));
+    server_ok(5);
+    EXPECT_TRUE(ParseFromByteBuffer(&srv_recv_buffer, &recv_request));
+    EXPECT_EQ(send_request.message(), recv_request.message());
+
+    send_response.set_message(recv_request.message());
+    std::unique_ptr<ByteBuffer> srv_send_buffer =
+        SerializeToByteBuffer(&send_response);
+    stream.Write(*srv_send_buffer, tag(6));
+    server_ok(6);
+
+    stream.Finish(Status::OK, tag(7));
+    server_ok(7);
+
+    client_ok(1);
+    EXPECT_TRUE(ParseFromByteBuffer(&cli_recv_buffer, &recv_response));
+    EXPECT_EQ(send_response.message(), recv_response.message());
+    EXPECT_TRUE(recv_status.ok());
+  }
+}
+
 // One ping, one pong.
 TEST_F(GenericEnd2endTest, SimpleBidiStreaming) {
   ResetStub();
diff --git a/test/cpp/end2end/grpclb_end2end_test.cc b/test/cpp/end2end/grpclb_end2end_test.cc
index 570a3d1067..77ed155292 100644
--- a/test/cpp/end2end/grpclb_end2end_test.cc
+++ b/test/cpp/end2end/grpclb_end2end_test.cc
@@ -398,11 +398,40 @@ class GrpclbEnd2endTest : public ::testing::Test {
     return true;
   }
 
-  void WaitForAllBackends() {
+  void SendRpcAndCount(int* num_total, int* num_ok, int* num_failure,
+                       int* num_drops) {
+    const Status status = SendRpc();
+    if (status.ok()) {
+      ++*num_ok;
+    } else {
+      if (status.error_message() == "Call dropped by load balancing policy") {
+        ++*num_drops;
+      } else {
+        ++*num_failure;
+      }
+    }
+    ++*num_total;
+  }
+
+  std::tuple<int, int, int> WaitForAllBackends(
+      int num_requests_multiple_of = 1) {
+    int num_ok = 0;
+    int num_failure = 0;
+    int num_drops = 0;
+    int num_total = 0;
     while (!SeenAllBackends()) {
-      CheckRpcSendOk();
+      SendRpcAndCount(&num_total, &num_ok, &num_failure, &num_drops);
+    }
+    while (num_total % num_requests_multiple_of != 0) {
+      SendRpcAndCount(&num_total, &num_ok, &num_failure, &num_drops);
     }
     ResetBackendCounters();
+    gpr_log(GPR_INFO,
+            "Performed %d warm up requests (a multiple of %d) against the "
+            "backends. %d succeeded, %d failed, %d dropped.",
+            num_total, num_requests_multiple_of, num_ok, num_failure,
+            num_drops);
+    return std::make_tuple(num_ok, num_failure, num_drops);
   }
 
   void WaitForBackend(size_t backend_idx) {
@@ -556,10 +585,8 @@ TEST_F(SingleBalancerTest, Vanilla) {
       0);
   // Make sure that trying to connect works without a call.
   channel_->GetState(true /* try_to_connect */);
-
   // We need to wait for all backends to come online.
   WaitForAllBackends();
-
   // Send kNumRpcsPerAddress RPCs per server.
   CheckRpcSendOk(kNumRpcsPerAddress * num_backends_);
 
@@ -863,13 +890,22 @@ TEST_F(UpdatesTest, UpdateBalancersDeadUpdate) {
 
 TEST_F(SingleBalancerTest, Drop) {
   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;
+  const int num_of_drop_addresses = num_of_drop_by_rate_limiting_addresses +
+                                    num_of_drop_by_load_balancing_addresses;
+  const int num_total_addresses = num_backends_ + num_of_drop_addresses;
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(
-             GetBackendPorts(), {{"rate_limiting", 1}, {"load_balancing", 2}}),
+             GetBackendPorts(),
+             {{"rate_limiting", num_of_drop_by_rate_limiting_addresses},
+              {"load_balancing", num_of_drop_by_load_balancing_addresses}}),
       0);
+  // Wait until all backends are ready.
+  WaitForAllBackends();
   // Send kNumRpcsPerAddress RPCs for each server and drop address.
   size_t num_drops = 0;
-  for (size_t i = 0; i < kNumRpcsPerAddress * (num_backends_ + 3); ++i) {
+  for (size_t i = 0; i < kNumRpcsPerAddress * num_total_addresses; ++i) {
     EchoResponse response;
     const Status status = SendRpc(&response);
     if (!status.ok() &&
@@ -881,7 +917,7 @@ TEST_F(SingleBalancerTest, Drop) {
       EXPECT_EQ(response.message(), kMessage_);
     }
   }
-  EXPECT_EQ(kNumRpcsPerAddress * 3, num_drops);
+  EXPECT_EQ(kNumRpcsPerAddress * num_of_drop_addresses, num_drops);
 
   // Each backend should have gotten 100 requests.
   for (size_t i = 0; i < backends_.size(); ++i) {
@@ -896,9 +932,12 @@ TEST_F(SingleBalancerTest, Drop) {
 
 TEST_F(SingleBalancerTest, DropAllFirst) {
   // 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;
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(
-             {}, {{"rate_limiting", 1}, {"load_balancing", 1}}),
+             {}, {{"rate_limiting", num_of_drop_by_rate_limiting_addresses},
+                  {"load_balancing", num_of_drop_by_load_balancing_addresses}}),
       0);
   const Status status = SendRpc();
   EXPECT_FALSE(status.ok());
@@ -909,9 +948,12 @@ TEST_F(SingleBalancerTest, DropAll) {
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
       0);
+  const int num_of_drop_by_rate_limiting_addresses = 1;
+  const int num_of_drop_by_load_balancing_addresses = 1;
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(
-             {}, {{"rate_limiting", 1}, {"load_balancing", 1}}),
+             {}, {{"rate_limiting", num_of_drop_by_rate_limiting_addresses},
+                  {"load_balancing", num_of_drop_by_load_balancing_addresses}}),
       1000);
 
   // First call succeeds.
@@ -936,6 +978,11 @@ TEST_F(SingleBalancerWithClientLoadReportingTest, Vanilla) {
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
       0);
+  // Wait until all backends are ready.
+  int num_ok = 0;
+  int num_failure = 0;
+  int num_drops = 0;
+  std::tie(num_ok, num_failure, num_drops) = WaitForAllBackends();
   // Send kNumRpcsPerAddress RPCs per server.
   CheckRpcSendOk(kNumRpcsPerAddress * num_backends_);
   // Each backend should have gotten 100 requests.
@@ -950,24 +997,39 @@ TEST_F(SingleBalancerWithClientLoadReportingTest, Vanilla) {
   EXPECT_EQ(1U, balancer_servers_[0].service_->response_count());
 
   const ClientStats client_stats = WaitForLoadReports();
-  EXPECT_EQ(kNumRpcsPerAddress * num_backends_, client_stats.num_calls_started);
-  EXPECT_EQ(kNumRpcsPerAddress * num_backends_,
+  EXPECT_EQ(kNumRpcsPerAddress * num_backends_ + num_ok,
+            client_stats.num_calls_started);
+  EXPECT_EQ(kNumRpcsPerAddress * num_backends_ + num_ok,
             client_stats.num_calls_finished);
   EXPECT_EQ(0U, client_stats.num_calls_finished_with_client_failed_to_send);
-  EXPECT_EQ(kNumRpcsPerAddress * num_backends_,
+  EXPECT_EQ(kNumRpcsPerAddress * num_backends_ + (num_ok + num_drops),
             client_stats.num_calls_finished_known_received);
   EXPECT_THAT(client_stats.drop_token_counts, ::testing::ElementsAre());
 }
 
 TEST_F(SingleBalancerWithClientLoadReportingTest, Drop) {
   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;
+  const int num_of_drop_addresses = num_of_drop_by_rate_limiting_addresses +
+                                    num_of_drop_by_load_balancing_addresses;
+  const int num_total_addresses = num_backends_ + num_of_drop_addresses;
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(
-             GetBackendPorts(), {{"rate_limiting", 2}, {"load_balancing", 1}}),
+             GetBackendPorts(),
+             {{"rate_limiting", num_of_drop_by_rate_limiting_addresses},
+              {"load_balancing", num_of_drop_by_load_balancing_addresses}}),
       0);
-
+  // Wait until all backends are ready.
+  int num_warmup_ok = 0;
+  int num_warmup_failure = 0;
+  int num_warmup_drops = 0;
+  std::tie(num_warmup_ok, num_warmup_failure, num_warmup_drops) =
+      WaitForAllBackends(num_total_addresses /* num_requests_multiple_of */);
+  const int num_total_warmup_requests =
+      num_warmup_ok + num_warmup_failure + num_warmup_drops;
   size_t num_drops = 0;
-  for (size_t i = 0; i < kNumRpcsPerAddress * (num_backends_ + 3); ++i) {
+  for (size_t i = 0; i < kNumRpcsPerAddress * num_total_addresses; ++i) {
     EchoResponse response;
     const Status status = SendRpc(&response);
     if (!status.ok() &&
@@ -979,8 +1041,7 @@ TEST_F(SingleBalancerWithClientLoadReportingTest, Drop) {
       EXPECT_EQ(response.message(), kMessage_);
     }
   }
-  EXPECT_EQ(kNumRpcsPerAddress * 3, num_drops);
-
+  EXPECT_EQ(kNumRpcsPerAddress * num_of_drop_addresses, num_drops);
   // Each backend should have gotten 100 requests.
   for (size_t i = 0; i < backends_.size(); ++i) {
     EXPECT_EQ(kNumRpcsPerAddress,
@@ -993,17 +1054,28 @@ TEST_F(SingleBalancerWithClientLoadReportingTest, Drop) {
   EXPECT_EQ(1U, balancer_servers_[0].service_->response_count());
 
   const ClientStats client_stats = WaitForLoadReports();
-  EXPECT_EQ(kNumRpcsPerAddress * (num_backends_ + 3),
-            client_stats.num_calls_started);
-  EXPECT_EQ(kNumRpcsPerAddress * (num_backends_ + 3),
-            client_stats.num_calls_finished);
+  EXPECT_EQ(
+      kNumRpcsPerAddress * num_total_addresses + num_total_warmup_requests,
+      client_stats.num_calls_started);
+  EXPECT_EQ(
+      kNumRpcsPerAddress * num_total_addresses + num_total_warmup_requests,
+      client_stats.num_calls_finished);
   EXPECT_EQ(0U, client_stats.num_calls_finished_with_client_failed_to_send);
-  EXPECT_EQ(kNumRpcsPerAddress * num_backends_,
+  EXPECT_EQ(kNumRpcsPerAddress * num_backends_ + num_warmup_ok,
             client_stats.num_calls_finished_known_received);
-  EXPECT_THAT(client_stats.drop_token_counts,
-              ::testing::ElementsAre(
-                  ::testing::Pair("load_balancing", kNumRpcsPerAddress),
-                  ::testing::Pair("rate_limiting", kNumRpcsPerAddress * 2)));
+  // The number of warmup request is a multiple of the number of addresses.
+  // Therefore, all addresses in the scheduled balancer response are hit the
+  // same number of times.
+  const int num_times_drop_addresses_hit =
+      num_warmup_drops / num_of_drop_addresses;
+  EXPECT_THAT(
+      client_stats.drop_token_counts,
+      ::testing::ElementsAre(
+          ::testing::Pair("load_balancing",
+                          (kNumRpcsPerAddress + num_times_drop_addresses_hit)),
+          ::testing::Pair(
+              "rate_limiting",
+              (kNumRpcsPerAddress + num_times_drop_addresses_hit) * 2)));
 }
 
 }  // namespace
diff --git a/test/cpp/microbenchmarks/BUILD b/test/cpp/microbenchmarks/BUILD
index 985a335f1b..0b69e9ba9a 100644
--- a/test/cpp/microbenchmarks/BUILD
+++ b/test/cpp/microbenchmarks/BUILD
@@ -73,12 +73,29 @@ grpc_cc_binary(
     deps = [":helpers"],
 )
 
+grpc_cc_library(
+    name = "fullstack_streaming_ping_pong_h",
+    testonly = 1,
+    hdrs = [
+        "fullstack_streaming_ping_pong.h",
+    ],
+    deps = [":helpers"],
+)
+
 grpc_cc_binary(
     name = "bm_fullstack_streaming_ping_pong",
     testonly = 1,
     srcs = [
         "bm_fullstack_streaming_ping_pong.cc",
-        "fullstack_streaming_ping_pong.h",
+    ],
+    deps = [":fullstack_streaming_ping_pong_h"],
+)
+
+grpc_cc_library(
+    name = "fullstack_streaming_pump_h",
+    testonly = 1,
+    hdrs = [
+        "fullstack_streaming_pump.h",
     ],
     deps = [":helpers"],
 )
@@ -88,9 +105,8 @@ grpc_cc_binary(
     testonly = 1,
     srcs = [
         "bm_fullstack_streaming_pump.cc",
-        "fullstack_streaming_pump.h",
     ],
-    deps = [":helpers"],
+    deps = [":fullstack_streaming_pump_h"],
 )
 
 grpc_cc_binary(
@@ -103,14 +119,22 @@ grpc_cc_binary(
     ],
 )
 
+grpc_cc_library(
+    name = "fullstack_unary_ping_pong_h",
+    testonly = 1,
+    hdrs = [
+        "fullstack_unary_ping_pong.h",
+    ],
+    deps = [":helpers"],
+)
+
 grpc_cc_binary(
     name = "bm_fullstack_unary_ping_pong",
     testonly = 1,
     srcs = [
         "bm_fullstack_unary_ping_pong.cc",
-        "fullstack_unary_ping_pong.h",
     ],
-    deps = [":helpers"],
+    deps = [":fullstack_unary_ping_pong_h"],
 )
 
 grpc_cc_binary(
diff --git a/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc b/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
index 9d71d3990d..5c9405f583 100644
--- a/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
+++ b/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
@@ -59,7 +59,8 @@ static void pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* ps) {
   gpr_mu_destroy(&ps->mu);
 }
 
-static grpc_error* pollset_kick(grpc_pollset* p, grpc_pollset_worker* worker) {
+static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
+                                grpc_pollset_worker* worker) {
   return GRPC_ERROR_NONE;
 }
 
diff --git a/test/cpp/microbenchmarks/bm_fullstack_trickle.cc b/test/cpp/microbenchmarks/bm_fullstack_trickle.cc
index 59fb29dd60..2656566a50 100644
--- a/test/cpp/microbenchmarks/bm_fullstack_trickle.cc
+++ b/test/cpp/microbenchmarks/bm_fullstack_trickle.cc
@@ -22,7 +22,6 @@
 #include <gflags/gflags.h>
 #include <fstream>
 #include "src/core/lib/profiling/timers.h"
-#include "src/cpp/client/create_channel_internal.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/cpp/microbenchmarks/fullstack_context_mutators.h"
 #include "test/cpp/microbenchmarks/fullstack_fixtures.h"
diff --git a/test/cpp/microbenchmarks/fullstack_fixtures.h b/test/cpp/microbenchmarks/fullstack_fixtures.h
index 5477b860b4..ecd28c3f8a 100644
--- a/test/cpp/microbenchmarks/fullstack_fixtures.h
+++ b/test/cpp/microbenchmarks/fullstack_fixtures.h
@@ -41,6 +41,7 @@ extern "C" {
 #include "test/core/util/port.h"
 }
 
+#include "src/cpp/client/create_channel_internal.h"
 #include "test/cpp/microbenchmarks/helpers.h"
 
 namespace grpc {
diff --git a/test/cpp/microbenchmarks/fullstack_streaming_ping_pong.h b/test/cpp/microbenchmarks/fullstack_streaming_ping_pong.h
index ff1f966753..6df044f344 100644
--- a/test/cpp/microbenchmarks/fullstack_streaming_ping_pong.h
+++ b/test/cpp/microbenchmarks/fullstack_streaming_ping_pong.h
@@ -24,7 +24,6 @@
 #include <benchmark/benchmark.h>
 #include <sstream>
 #include "src/core/lib/profiling/timers.h"
-#include "src/cpp/client/create_channel_internal.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/cpp/microbenchmarks/fullstack_context_mutators.h"
 #include "test/cpp/microbenchmarks/fullstack_fixtures.h"
diff --git a/test/cpp/microbenchmarks/fullstack_streaming_pump.h b/test/cpp/microbenchmarks/fullstack_streaming_pump.h
index f9db212b02..9e826091ec 100644
--- a/test/cpp/microbenchmarks/fullstack_streaming_pump.h
+++ b/test/cpp/microbenchmarks/fullstack_streaming_pump.h
@@ -24,7 +24,6 @@
 #include <benchmark/benchmark.h>
 #include <sstream>
 #include "src/core/lib/profiling/timers.h"
-#include "src/cpp/client/create_channel_internal.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/cpp/microbenchmarks/fullstack_context_mutators.h"
 #include "test/cpp/microbenchmarks/fullstack_fixtures.h"
diff --git a/test/cpp/microbenchmarks/fullstack_unary_ping_pong.h b/test/cpp/microbenchmarks/fullstack_unary_ping_pong.h
index 76d278b2a0..d448938295 100644
--- a/test/cpp/microbenchmarks/fullstack_unary_ping_pong.h
+++ b/test/cpp/microbenchmarks/fullstack_unary_ping_pong.h
@@ -24,7 +24,6 @@
 #include <benchmark/benchmark.h>
 #include <sstream>
 #include "src/core/lib/profiling/timers.h"
-#include "src/cpp/client/create_channel_internal.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/cpp/microbenchmarks/fullstack_context_mutators.h"
 #include "test/cpp/microbenchmarks/fullstack_fixtures.h"
diff --git a/test/cpp/naming/BUILD b/test/cpp/naming/BUILD
new file mode 100644
index 0000000000..24c3d1a443
--- /dev/null
+++ b/test/cpp/naming/BUILD
@@ -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.
+
+package(
+    default_visibility = ["//visibility:public"],
+    features = [
+        "-layering_check",
+        "-parse_headers",
+    ],
+)
+
+licenses(["notice"])  # Apache v2
+
+load("//bazel:grpc_build_system.bzl", "grpc_sh_binary", "grpc_py_binary")
+
+load(":generate_resolver_component_tests.bzl", "generate_resolver_component_tests")
+
+# Meant to be invoked only through the top-level shell script driver.
+grpc_sh_binary(
+    name = "resolver_component_tests_runner",
+    srcs = [
+        "resolver_component_tests_runner.sh",
+    ],
+)
+
+grpc_py_binary(
+  name = "test_dns_server",
+  srcs = ["test_dns_server.py"],
+  data = [
+      "resolver_test_record_groups.yaml",
+  ],
+  deps = [
+      "twisted",
+      "yaml",
+  ]
+)
+
+generate_resolver_component_tests()
diff --git a/test/cpp/naming/gen_build_yaml.py b/test/cpp/naming/gen_build_yaml.py
new file mode 100755
index 0000000000..3a51fef7a0
--- /dev/null
+++ b/test/cpp/naming/gen_build_yaml.py
@@ -0,0 +1,99 @@
+#!/usr/bin/env python2.7
+# Copyright 2015 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.
+
+
+"""Generates the appropriate build.json data for all the naming tests."""
+
+
+import yaml
+import collections
+import hashlib
+import json
+
+_LOCAL_DNS_SERVER_ADDRESS = '127.0.0.1:15353'
+
+def _append_zone_name(name, zone_name):
+  return '%s.%s' % (name, zone_name)
+
+def _build_expected_addrs_cmd_arg(expected_addrs):
+  out = []
+  for addr in expected_addrs:
+    out.append('%s,%s' % (addr['address'], str(addr['is_balancer'])))
+  return ';'.join(out)
+
+def main():
+  resolver_component_data = ''
+  with open('test/cpp/naming/resolver_test_record_groups.yaml') as f:
+    resolver_component_data = yaml.load(f)
+
+  json = {
+      'resolver_component_test_cases': [
+          {
+              'target_name': _append_zone_name(test_case['record_to_resolve'],
+                                                 resolver_component_data['resolver_component_tests_common_zone_name']),
+              'expected_addrs': _build_expected_addrs_cmd_arg(test_case['expected_addrs']),
+              'expected_chosen_service_config': (test_case['expected_chosen_service_config'] or ''),
+              'expected_lb_policy': (test_case['expected_lb_policy'] or ''),
+          } for test_case in resolver_component_data['resolver_component_tests']
+      ],
+      'targets': [
+          {
+              'name': 'resolver_component_test' + unsecure_build_config_suffix,
+              'build': 'test',
+              'language': 'c++',
+              'gtest': False,
+              'run': False,
+              'src': ['test/cpp/naming/resolver_component_test.cc'],
+              'platforms': ['linux', 'posix', 'mac'],
+              'deps': [
+                  'grpc++_test_util' + unsecure_build_config_suffix,
+                  'grpc_test_util' + unsecure_build_config_suffix,
+                  'gpr_test_util',
+                  'grpc++' + unsecure_build_config_suffix,
+                  'grpc' + unsecure_build_config_suffix,
+                  'gpr',
+                  'grpc++_test_config',
+              ],
+          } for unsecure_build_config_suffix in ['_unsecure', '']
+      ] + [
+          {
+              'name': 'resolver_component_tests_runner_invoker' + unsecure_build_config_suffix,
+              'build': 'test',
+              'language': 'c++',
+              'gtest': False,
+              'run': True,
+              'src': ['test/cpp/naming/resolver_component_tests_runner_invoker.cc'],
+              'platforms': ['linux', 'posix', 'mac'],
+              'deps': [
+                  'grpc++_test_util',
+                  'grpc_test_util',
+                  'gpr_test_util',
+                  'grpc++',
+                  'grpc',
+                  'gpr',
+                  'grpc++_test_config',
+              ],
+              'args': [
+                  '--test_bin_name=resolver_component_test%s' % unsecure_build_config_suffix,
+                  '--running_under_bazel=false',
+              ],
+          } for unsecure_build_config_suffix in ['_unsecure', '']
+      ]
+  }
+
+  print(yaml.dump(json))
+
+if __name__ == '__main__':
+  main()
diff --git a/test/cpp/naming/generate_resolver_component_tests.bzl b/test/cpp/naming/generate_resolver_component_tests.bzl
new file mode 100755
index 0000000000..118d9452d9
--- /dev/null
+++ b/test/cpp/naming/generate_resolver_component_tests.bzl
@@ -0,0 +1,64 @@
+#!/usr/bin/env python2.7
+# Copyright 2015 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.
+
+load("//bazel:grpc_build_system.bzl", "grpc_sh_binary", "grpc_cc_test", "grpc_cc_binary")
+
+def generate_resolver_component_tests():
+  for unsecure_build_config_suffix in ['_unsecure', '']:
+    # meant to be invoked only through the top-level shell script driver
+    grpc_cc_binary(
+        name = "resolver_component_test%s" % unsecure_build_config_suffix,
+        testonly = 1,
+        srcs = [
+            "resolver_component_test.cc",
+        ],
+        external_deps = [
+            "gmock",
+        ],
+        deps = [
+            "//test/cpp/util:test_util%s" % unsecure_build_config_suffix,
+            "//test/core/util:grpc_test_util%s" % unsecure_build_config_suffix,
+            "//test/core/util:gpr_test_util",
+            "//:grpc++%s" % unsecure_build_config_suffix,
+            "//:grpc%s" % unsecure_build_config_suffix,
+            "//:gpr",
+            "//test/cpp/util:test_config",
+        ],
+    )
+    grpc_cc_test(
+        name = "resolver_component_tests_runner_invoker%s" % unsecure_build_config_suffix,
+        srcs = [
+            "resolver_component_tests_runner_invoker.cc",
+        ],
+        deps = [
+            "//test/cpp/util:test_util",
+            "//test/core/util:grpc_test_util",
+            "//test/core/util:gpr_test_util",
+            "//:grpc++",
+            "//:grpc",
+            "//:gpr",
+            "//test/cpp/util:test_config",
+        ],
+        data = [
+            ":resolver_component_tests_runner",
+            ":resolver_component_test%s" % unsecure_build_config_suffix,
+            ":test_dns_server",
+            "resolver_test_record_groups.yaml", # include the transitive dependency so that the dns sever py binary can locate this
+        ],
+        args = [
+            "--test_bin_name=resolver_component_test%s" % unsecure_build_config_suffix,
+            "--running_under_bazel=true",
+        ]
+    )
diff --git a/test/cpp/naming/resolver_component_test.cc b/test/cpp/naming/resolver_component_test.cc
new file mode 100644
index 0000000000..cc851ca9d5
--- /dev/null
+++ b/test/cpp/naming/resolver_component_test.cc
@@ -0,0 +1,326 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/time.h>
+#include <string.h>
+
+#include <gflags/gflags.h>
+#include <gmock/gmock.h>
+#include <vector>
+
+#include "test/cpp/util/subprocess.h"
+#include "test/cpp/util/test_config.h"
+
+extern "C" {
+#include "src/core/ext/filters/client_channel/client_channel.h"
+#include "src/core/ext/filters/client_channel/resolver.h"
+#include "src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h"
+#include "src/core/ext/filters/client_channel/resolver_registry.h"
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/iomgr/combiner.h"
+#include "src/core/lib/iomgr/executor.h"
+#include "src/core/lib/iomgr/iomgr.h"
+#include "src/core/lib/iomgr/resolve_address.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/support/env.h"
+#include "src/core/lib/support/string.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
+}
+
+using std::vector;
+using grpc::SubProcess;
+using testing::UnorderedElementsAreArray;
+
+// Hack copied from "test/cpp/end2end/server_crash_test_client.cc"!
+// In some distros, gflags is in the namespace google, and in some others,
+// in gflags. This hack is enabling us to find both.
+namespace google {}
+namespace gflags {}
+using namespace google;
+using namespace gflags;
+
+DEFINE_string(target_name, "", "Target name to resolve.");
+DEFINE_string(expected_addrs, "",
+              "Comma-separated list of expected "
+              "'<ip0:port0>,<is_balancer0>;<ip1:port1>,<is_balancer1>;...' "
+              "addresses of "
+              "backend and/or balancers. 'is_balancer' should be bool, i.e. "
+              "true or false.");
+DEFINE_string(expected_chosen_service_config, "",
+              "Expected service config json string that gets chosen (no "
+              "whitespace). Empty for none.");
+DEFINE_string(
+    local_dns_server_address, "",
+    "Optional. This address is placed as the uri authority if present.");
+DEFINE_string(expected_lb_policy, "",
+              "Expected lb policy name that appears in resolver result channel "
+              "arg. Empty for none.");
+
+namespace {
+
+class GrpcLBAddress final {
+ public:
+  GrpcLBAddress(std::string address, bool is_balancer)
+      : is_balancer(is_balancer), address(address) {}
+
+  bool operator==(const GrpcLBAddress &other) const {
+    return this->is_balancer == other.is_balancer &&
+           this->address == other.address;
+  }
+
+  bool operator!=(const GrpcLBAddress &other) const {
+    return !(*this == other);
+  }
+
+  bool is_balancer;
+  std::string address;
+};
+
+vector<GrpcLBAddress> ParseExpectedAddrs(std::string expected_addrs) {
+  std::vector<GrpcLBAddress> out;
+  while (expected_addrs.size() != 0) {
+    // get the next <ip>,<port> (v4 or v6)
+    size_t next_comma = expected_addrs.find(",");
+    if (next_comma == std::string::npos) {
+      gpr_log(
+          GPR_ERROR,
+          "Missing ','. Expected_addrs arg should be a semi-colon-separated "
+          "list of "
+          "<ip-port>,<bool> pairs. Left-to-be-parsed arg is |%s|",
+          expected_addrs.c_str());
+      abort();
+    }
+    std::string next_addr = expected_addrs.substr(0, next_comma);
+    expected_addrs = expected_addrs.substr(next_comma + 1, std::string::npos);
+    // get the next is_balancer 'bool' associated with this address
+    size_t next_semicolon = expected_addrs.find(";");
+    bool is_balancer =
+        gpr_is_true(expected_addrs.substr(0, next_semicolon).c_str());
+    out.emplace_back(GrpcLBAddress(next_addr, is_balancer));
+    if (next_semicolon == std::string::npos) {
+      break;
+    }
+    expected_addrs =
+        expected_addrs.substr(next_semicolon + 1, std::string::npos);
+  }
+  if (out.size() == 0) {
+    gpr_log(GPR_ERROR,
+            "expected_addrs arg should be a comma-separated list of "
+            "<ip-port>,<bool> pairs");
+    abort();
+  }
+  return out;
+}
+
+gpr_timespec TestDeadline(void) {
+  return grpc_timeout_seconds_to_deadline(100);
+}
+
+struct ArgsStruct {
+  gpr_event ev;
+  gpr_atm done_atm;
+  gpr_mu *mu;
+  grpc_pollset *pollset;
+  grpc_pollset_set *pollset_set;
+  grpc_combiner *lock;
+  grpc_channel_args *channel_args;
+  vector<GrpcLBAddress> expected_addrs;
+  std::string expected_service_config_string;
+  std::string expected_lb_policy;
+};
+
+void ArgsInit(grpc_exec_ctx *exec_ctx, 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);
+  args->lock = grpc_combiner_create();
+  gpr_atm_rel_store(&args->done_atm, 0);
+  args->channel_args = NULL;
+}
+
+void DoNothing(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {}
+
+void ArgsFinish(grpc_exec_ctx *exec_ctx, 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_closure DoNothing_cb;
+  GRPC_CLOSURE_INIT(&DoNothing_cb, DoNothing, NULL, grpc_schedule_on_exec_ctx);
+  grpc_pollset_shutdown(exec_ctx, 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);
+  gpr_free(args->pollset);
+  GRPC_COMBINER_UNREF(exec_ctx, args->lock, NULL);
+}
+
+gpr_timespec NSecondDeadline(int seconds) {
+  return gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+                      gpr_time_from_seconds(seconds, GPR_TIMESPAN));
+}
+
+void PollPollsetUntilRequestDone(ArgsStruct *args) {
+  gpr_timespec deadline = NSecondDeadline(10);
+  while (true) {
+    bool done = gpr_atm_acq_load(&args->done_atm) != 0;
+    if (done) {
+      break;
+    }
+    gpr_timespec time_left =
+        gpr_time_sub(deadline, gpr_now(GPR_CLOCK_REALTIME));
+    gpr_log(GPR_DEBUG, "done=%d, time_left=%" PRId64 ".%09d", done,
+            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 = NULL;
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    gpr_mu_lock(args->mu);
+    GRPC_LOG_IF_ERROR(
+        "pollset_work",
+        grpc_pollset_work(&exec_ctx, args->pollset, &worker,
+                          gpr_now(GPR_CLOCK_REALTIME), NSecondDeadline(1)));
+    gpr_mu_unlock(args->mu);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
+  gpr_event_set(&args->ev, (void *)1);
+}
+
+void CheckServiceConfigResultLocked(grpc_channel_args *channel_args,
+                                    ArgsStruct *args) {
+  const grpc_arg *service_config_arg =
+      grpc_channel_args_find(channel_args, GRPC_ARG_SERVICE_CONFIG);
+  if (args->expected_service_config_string != "") {
+    GPR_ASSERT(service_config_arg != NULL);
+    GPR_ASSERT(service_config_arg->type == GRPC_ARG_STRING);
+    EXPECT_EQ(service_config_arg->value.string,
+              args->expected_service_config_string);
+  } else {
+    GPR_ASSERT(service_config_arg == NULL);
+  }
+}
+
+void CheckLBPolicyResultLocked(grpc_channel_args *channel_args,
+                               ArgsStruct *args) {
+  const grpc_arg *lb_policy_arg =
+      grpc_channel_args_find(channel_args, GRPC_ARG_LB_POLICY_NAME);
+  if (args->expected_lb_policy != "") {
+    GPR_ASSERT(lb_policy_arg != NULL);
+    GPR_ASSERT(lb_policy_arg->type == GRPC_ARG_STRING);
+    EXPECT_EQ(lb_policy_arg->value.string, args->expected_lb_policy);
+  } else {
+    GPR_ASSERT(lb_policy_arg == NULL);
+  }
+}
+
+void CheckResolverResultLocked(grpc_exec_ctx *exec_ctx, void *argsp,
+                               grpc_error *err) {
+  ArgsStruct *args = (ArgsStruct *)argsp;
+  grpc_channel_args *channel_args = args->channel_args;
+  const grpc_arg *channel_arg =
+      grpc_channel_args_find(channel_args, GRPC_ARG_LB_ADDRESSES);
+  GPR_ASSERT(channel_arg != NULL);
+  GPR_ASSERT(channel_arg->type == GRPC_ARG_POINTER);
+  grpc_lb_addresses *addresses =
+      (grpc_lb_addresses *)channel_arg->value.pointer.p;
+  gpr_log(GPR_INFO, "num addrs found: %" PRIdPTR ". expected %" PRIdPTR,
+          addresses->num_addresses, args->expected_addrs.size());
+  GPR_ASSERT(addresses->num_addresses == args->expected_addrs.size());
+  std::vector<GrpcLBAddress> found_lb_addrs;
+  for (size_t i = 0; i < addresses->num_addresses; i++) {
+    grpc_lb_address addr = addresses->addresses[i];
+    char *str;
+    grpc_sockaddr_to_string(&str, &addr.address, 1 /* normalize */);
+    gpr_log(GPR_INFO, "%s", str);
+    found_lb_addrs.emplace_back(
+        GrpcLBAddress(std::string(str), addr.is_balancer));
+    gpr_free(str);
+  }
+  if (args->expected_addrs.size() != found_lb_addrs.size()) {
+    gpr_log(GPR_DEBUG, "found lb addrs size is: %" PRIdPTR
+                       ". expected addrs size is %" PRIdPTR,
+            found_lb_addrs.size(), args->expected_addrs.size());
+    abort();
+  }
+  EXPECT_THAT(args->expected_addrs, UnorderedElementsAreArray(found_lb_addrs));
+  CheckServiceConfigResultLocked(channel_args, args);
+  if (args->expected_service_config_string == "") {
+    CheckLBPolicyResultLocked(channel_args, args);
+  }
+  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, NULL));
+  gpr_mu_unlock(args->mu);
+}
+
+TEST(ResolverComponentTest, TestResolvesRelevantRecords) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  ArgsStruct args;
+  ArgsInit(&exec_ctx, &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;
+  // maybe build the address with an authority
+  char *whole_uri = NULL;
+  GPR_ASSERT(asprintf(&whole_uri, "dns://%s/%s",
+                      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, NULL,
+                                                 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,
+                            &on_resolver_result_changed);
+  grpc_exec_ctx_flush(&exec_ctx);
+  PollPollsetUntilRequestDone(&args);
+  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, NULL);
+  ArgsFinish(&exec_ctx, &args);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+}  // namespace
+
+int main(int argc, char **argv) {
+  grpc_init();
+  grpc_test_init(argc, argv);
+  ::testing::InitGoogleTest(&argc, argv);
+  ParseCommandLineFlags(&argc, &argv, true);
+  if (FLAGS_target_name == "") {
+    gpr_log(GPR_ERROR, "Missing target_name param.");
+    abort();
+  }
+  if (FLAGS_local_dns_server_address != "") {
+    gpr_log(GPR_INFO, "Specifying authority in uris to: %s",
+            FLAGS_local_dns_server_address.c_str());
+  }
+  auto result = RUN_ALL_TESTS();
+  grpc_shutdown();
+  return result;
+}
diff --git a/test/cpp/naming/resolver_component_tests_runner.sh b/test/cpp/naming/resolver_component_tests_runner.sh
new file mode 100755
index 0000000000..cf71c9dcf9
--- /dev/null
+++ b/test/cpp/naming/resolver_component_tests_runner.sh
@@ -0,0 +1,181 @@
+#!/bin/bash
+# Copyright 2015 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.
+
+# This file is auto-generated
+
+set -ex
+
+# all command args required in this set order
+FLAGS_test_bin_path=`echo "$1" | grep '\--test_bin_path=' | cut -d "=" -f 2`
+FLAGS_dns_server_bin_path=`echo "$2" | grep '\--dns_server_bin_path=' | cut -d "=" -f 2`
+FLAGS_records_config_path=`echo "$3" | grep '\--records_config_path=' | cut -d "=" -f 2`
+FLAGS_test_dns_server_port=`echo "$4" | grep '\--test_dns_server_port=' | cut -d "=" -f 2`
+
+for cmd_arg in "$FLAGS_test_bin_path" "$FLAGS_dns_server_bin_path" "$FLAGS_records_config_path" "$FLAGS_test_dns_server_port"; do
+  if [[ "$cmd_arg" == "" ]]; then
+    echo "Missing a CMD arg" && exit 1
+  fi
+done
+
+if [[ "$GRPC_DNS_RESOLVER" != "" && "$GRPC_DNS_RESOLVER" != ares ]]; then
+  echo "This test only works under GRPC_DNS_RESOLVER=ares. Have GRPC_DNS_RESOLVER=$GRPC_DNS_RESOLVER" && exit 1
+fi
+export GRPC_DNS_RESOLVER=ares
+
+"$FLAGS_dns_server_bin_path" --records_config_path="$FLAGS_records_config_path" --port="$FLAGS_test_dns_server_port" 2>&1 > /dev/null &
+DNS_SERVER_PID=$!
+echo "Local DNS server started. PID: $DNS_SERVER_PID"
+
+# Health check local DNS server TCP and UDP ports
+for ((i=0;i<30;i++));
+do
+  echo "Retry health-check DNS query to local DNS server over tcp and udp"
+  RETRY=0
+  dig A health-check-local-dns-server-is-alive.resolver-tests.grpctestingexp. @localhost -p "$FLAGS_test_dns_server_port" +tries=1 +timeout=1 | grep '123.123.123.123' || RETRY=1
+  dig A health-check-local-dns-server-is-alive.resolver-tests.grpctestingexp. @localhost -p "$FLAGS_test_dns_server_port" +tries=1 +timeout=1 +tcp | grep '123.123.123.123' || RETRY=1
+  if [[ "$RETRY" == 0 ]]; then
+    break
+  fi;
+  sleep 0.1
+done
+
+if [[ $RETRY == 1 ]]; then
+  echo "FAILED TO START LOCAL DNS SERVER"
+  kill -SIGTERM $DNS_SERVER_PID
+  wait
+  exit 1
+fi
+
+function terminate_all {
+  echo "Received signal. Terminating $! and $DNS_SERVER_PID"
+  kill -SIGTERM $! || true
+  kill -SIGTERM $DNS_SERVER_PID || true
+  wait
+  exit 1
+}
+
+trap terminate_all SIGTERM SIGINT
+
+EXIT_CODE=0
+# TODO: this test should check for GCE residency and skip tests using _grpclb._tcp.* SRV records once GCE residency checks are made
+# in the resolver.
+
+$FLAGS_test_bin_path \
+  --target_name='srv-ipv4-single-target.resolver-tests.grpctestingexp.' \
+  --expected_addrs='1.2.3.4:1234,True' \
+  --expected_chosen_service_config='' \
+  --expected_lb_policy='' \
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+$FLAGS_test_bin_path \
+  --target_name='srv-ipv4-multi-target.resolver-tests.grpctestingexp.' \
+  --expected_addrs='1.2.3.5:1234,True;1.2.3.6:1234,True;1.2.3.7:1234,True' \
+  --expected_chosen_service_config='' \
+  --expected_lb_policy='' \
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+$FLAGS_test_bin_path \
+  --target_name='srv-ipv6-single-target.resolver-tests.grpctestingexp.' \
+  --expected_addrs='[2607:f8b0:400a:801::1001]:1234,True' \
+  --expected_chosen_service_config='' \
+  --expected_lb_policy='' \
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+$FLAGS_test_bin_path \
+  --target_name='srv-ipv6-multi-target.resolver-tests.grpctestingexp.' \
+  --expected_addrs='[2607:f8b0:400a:801::1002]:1234,True;[2607:f8b0:400a:801::1003]:1234,True;[2607:f8b0:400a:801::1004]:1234,True' \
+  --expected_chosen_service_config='' \
+  --expected_lb_policy='' \
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+$FLAGS_test_bin_path \
+  --target_name='srv-ipv4-simple-service-config.resolver-tests.grpctestingexp.' \
+  --expected_addrs='1.2.3.4:1234,True' \
+  --expected_chosen_service_config='{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"SimpleService","waitForReady":true}]}]}' \
+  --expected_lb_policy='round_robin' \
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+$FLAGS_test_bin_path \
+  --target_name='ipv4-no-srv-simple-service-config.resolver-tests.grpctestingexp.' \
+  --expected_addrs='1.2.3.4:443,False' \
+  --expected_chosen_service_config='{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"NoSrvSimpleService","waitForReady":true}]}]}' \
+  --expected_lb_policy='round_robin' \
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+$FLAGS_test_bin_path \
+  --target_name='ipv4-no-config-for-cpp.resolver-tests.grpctestingexp.' \
+  --expected_addrs='1.2.3.4:443,False' \
+  --expected_chosen_service_config='' \
+  --expected_lb_policy='' \
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+$FLAGS_test_bin_path \
+  --target_name='ipv4-cpp-config-has-zero-percentage.resolver-tests.grpctestingexp.' \
+  --expected_addrs='1.2.3.4:443,False' \
+  --expected_chosen_service_config='' \
+  --expected_lb_policy='' \
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+$FLAGS_test_bin_path \
+  --target_name='ipv4-second-language-is-cpp.resolver-tests.grpctestingexp.' \
+  --expected_addrs='1.2.3.4:443,False' \
+  --expected_chosen_service_config='{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"CppService","waitForReady":true}]}]}' \
+  --expected_lb_policy='round_robin' \
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+$FLAGS_test_bin_path \
+  --target_name='ipv4-config-with-percentages.resolver-tests.grpctestingexp.' \
+  --expected_addrs='1.2.3.4:443,False' \
+  --expected_chosen_service_config='{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"AlwaysPickedService","waitForReady":true}]}]}' \
+  --expected_lb_policy='round_robin' \
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+$FLAGS_test_bin_path \
+  --target_name='srv-ipv4-target-has-backend-and-balancer.resolver-tests.grpctestingexp.' \
+  --expected_addrs='1.2.3.4:1234,True;1.2.3.4:443,False' \
+  --expected_chosen_service_config='' \
+  --expected_lb_policy='' \
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+$FLAGS_test_bin_path \
+  --target_name='srv-ipv6-target-has-backend-and-balancer.resolver-tests.grpctestingexp.' \
+  --expected_addrs='[2607:f8b0:400a:801::1002]:1234,True;[2607:f8b0:400a:801::1002]:443,False' \
+  --expected_chosen_service_config='' \
+  --expected_lb_policy='' \
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+$FLAGS_test_bin_path \
+  --target_name='ipv4-config-causing-fallback-to-tcp.resolver-tests.grpctestingexp.' \
+  --expected_addrs='1.2.3.4:443,False' \
+  --expected_chosen_service_config='{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwo","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooThree","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooFour","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooFive","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooSix","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooSeven","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooEight","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooNine","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTen","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooEleven","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwelve","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwelve","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwelve","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwelve","service":"SimpleService","waitForReady":true}]}]}' \
+  --expected_lb_policy='' \
+  --local_dns_server_address=127.0.0.1:$FLAGS_test_dns_server_port &
+wait $! || EXIT_CODE=1
+
+kill -SIGTERM $DNS_SERVER_PID || true
+wait
+exit $EXIT_CODE
diff --git a/test/cpp/naming/resolver_component_tests_runner_invoker.cc b/test/cpp/naming/resolver_component_tests_runner_invoker.cc
new file mode 100644
index 0000000000..b14391284d
--- /dev/null
+++ b/test/cpp/naming/resolver_component_tests_runner_invoker.cc
@@ -0,0 +1,189 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <signal.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <gflags/gflags.h>
+#include <string>
+#include <thread>
+#include <vector>
+
+#include "test/cpp/util/subprocess.h"
+#include "test/cpp/util/test_config.h"
+
+extern "C" {
+#include "src/core/lib/support/env.h"
+#include "test/core/util/port.h"
+}
+
+DEFINE_bool(
+    running_under_bazel, false,
+    "True if this test is running under bazel. "
+    "False indicates that this test is running under run_tests.py. "
+    "Child process test binaries are located differently based on this flag. ");
+
+DEFINE_string(test_bin_name, "",
+              "Name, without the preceding path, of the test binary");
+
+DEFINE_string(grpc_test_directory_relative_to_test_srcdir, "/__main__",
+              "This flag only applies if runner_under_bazel is true. This "
+              "flag is ignored if runner_under_bazel is false. "
+              "Directory of the <repo-root>/test directory relative to bazel's "
+              "TEST_SRCDIR environment variable");
+
+using grpc::SubProcess;
+
+static volatile sig_atomic_t abort_wait_for_child = 0;
+
+static void sighandler(int sig) { abort_wait_for_child = 1; }
+
+static void register_sighandler() {
+  struct sigaction act;
+  memset(&act, 0, sizeof(act));
+  act.sa_handler = sighandler;
+  sigaction(SIGINT, &act, NULL);
+  sigaction(SIGTERM, &act, NULL);
+}
+
+namespace {
+
+const int kTestTimeoutSeconds = 60 * 2;
+
+void RunSigHandlingThread(SubProcess *test_driver, gpr_mu *test_driver_mu,
+                          gpr_cv *test_driver_cv, int *test_driver_done) {
+  gpr_timespec overall_deadline =
+      gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
+                   gpr_time_from_seconds(kTestTimeoutSeconds, GPR_TIMESPAN));
+  while (true) {
+    gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
+    if (gpr_time_cmp(now, overall_deadline) > 0 || abort_wait_for_child) break;
+    gpr_mu_lock(test_driver_mu);
+    if (*test_driver_done) {
+      gpr_mu_unlock(test_driver_mu);
+      return;
+    }
+    gpr_timespec wait_deadline = gpr_time_add(
+        gpr_now(GPR_CLOCK_MONOTONIC), gpr_time_from_seconds(1, GPR_TIMESPAN));
+    gpr_cv_wait(test_driver_cv, test_driver_mu, wait_deadline);
+    gpr_mu_unlock(test_driver_mu);
+  }
+  gpr_log(GPR_DEBUG,
+          "Test timeout reached or received signal. Interrupting test driver "
+          "child process.");
+  test_driver->Interrupt();
+  return;
+}
+}
+
+namespace grpc {
+
+namespace testing {
+
+void InvokeResolverComponentTestsRunner(std::string test_runner_bin_path,
+                                        std::string test_bin_path,
+                                        std::string dns_server_bin_path,
+                                        std::string records_config_path) {
+  int test_dns_server_port = grpc_pick_unused_port_or_die();
+
+  SubProcess *test_driver = new SubProcess(
+      {test_runner_bin_path, "--test_bin_path=" + test_bin_path,
+       "--dns_server_bin_path=" + dns_server_bin_path,
+       "--records_config_path=" + records_config_path,
+       "--test_dns_server_port=" + std::to_string(test_dns_server_port)});
+  gpr_mu test_driver_mu;
+  gpr_mu_init(&test_driver_mu);
+  gpr_cv test_driver_cv;
+  gpr_cv_init(&test_driver_cv);
+  int test_driver_done = 0;
+  register_sighandler();
+  std::thread sig_handling_thread(RunSigHandlingThread, test_driver,
+                                  &test_driver_mu, &test_driver_cv,
+                                  &test_driver_done);
+  int status = test_driver->Join();
+  if (WIFEXITED(status)) {
+    if (WEXITSTATUS(status)) {
+      gpr_log(GPR_INFO,
+              "Resolver component test test-runner exited with code %d",
+              WEXITSTATUS(status));
+      abort();
+    }
+  } else if (WIFSIGNALED(status)) {
+    gpr_log(GPR_INFO,
+            "Resolver component test test-runner ended from signal %d",
+            WTERMSIG(status));
+    abort();
+  } else {
+    gpr_log(GPR_INFO,
+            "Resolver component test test-runner ended with unknown status %d",
+            status);
+    abort();
+  }
+  gpr_mu_lock(&test_driver_mu);
+  test_driver_done = 1;
+  gpr_cv_signal(&test_driver_cv);
+  gpr_mu_unlock(&test_driver_mu);
+  sig_handling_thread.join();
+  delete test_driver;
+  gpr_mu_destroy(&test_driver_mu);
+  gpr_cv_destroy(&test_driver_cv);
+}
+
+}  // namespace testing
+
+}  // namespace grpc
+
+int main(int argc, char **argv) {
+  grpc::testing::InitTest(&argc, &argv, true);
+  grpc_init();
+  GPR_ASSERT(FLAGS_test_bin_name != "");
+  std::string my_bin = argv[0];
+  if (FLAGS_running_under_bazel) {
+    GPR_ASSERT(FLAGS_grpc_test_directory_relative_to_test_srcdir != "");
+    // Use bazel's TEST_SRCDIR environment variable to locate the "test data"
+    // binaries.
+    std::string const bin_dir =
+        gpr_getenv("TEST_SRCDIR") +
+        FLAGS_grpc_test_directory_relative_to_test_srcdir +
+        std::string("/test/cpp/naming");
+    // Invoke bazel's executeable links to the .sh and .py scripts (don't use
+    // the .sh and .py suffixes) to make
+    // sure that we're using bazel's test environment.
+    grpc::testing::InvokeResolverComponentTestsRunner(
+        bin_dir + "/resolver_component_tests_runner",
+        bin_dir + "/" + FLAGS_test_bin_name, bin_dir + "/test_dns_server",
+        bin_dir + "/resolver_test_record_groups.yaml");
+  } else {
+    // Get the current binary's directory relative to repo root to invoke the
+    // correct build config (asan/tsan/dbg, etc.).
+    std::string const bin_dir = my_bin.substr(0, my_bin.rfind('/'));
+    // Invoke the .sh and .py scripts directly where they are in source code.
+    grpc::testing::InvokeResolverComponentTestsRunner(
+        "test/cpp/naming/resolver_component_tests_runner.sh",
+        bin_dir + "/" + FLAGS_test_bin_name,
+        "test/cpp/naming/test_dns_server.py",
+        "test/cpp/naming/resolver_test_record_groups.yaml");
+  }
+  grpc_shutdown();
+  return 0;
+}
diff --git a/test/cpp/naming/resolver_test_record_groups.yaml b/test/cpp/naming/resolver_test_record_groups.yaml
new file mode 100644
index 0000000000..33d774ca70
--- /dev/null
+++ b/test/cpp/naming/resolver_test_record_groups.yaml
@@ -0,0 +1,149 @@
+resolver_component_tests_common_zone_name: resolver-tests.grpctestingexp.
+resolver_component_tests:
+- expected_addrs:
+  - {address: '1.2.3.4:1234', is_balancer: true}
+  expected_chosen_service_config: null
+  expected_lb_policy: null
+  record_to_resolve: srv-ipv4-single-target
+  records:
+    _grpclb._tcp.srv-ipv4-single-target:
+    - {TTL: '2100', data: 0 0 1234 ipv4-single-target, type: SRV}
+    ipv4-single-target:
+    - {TTL: '2100', data: 1.2.3.4, type: A}
+- expected_addrs:
+  - {address: '1.2.3.5:1234', is_balancer: true}
+  - {address: '1.2.3.6:1234', is_balancer: true}
+  - {address: '1.2.3.7:1234', is_balancer: true}
+  expected_chosen_service_config: null
+  expected_lb_policy: null
+  record_to_resolve: srv-ipv4-multi-target
+  records:
+    _grpclb._tcp.srv-ipv4-multi-target:
+    - {TTL: '2100', data: 0 0 1234 ipv4-multi-target, type: SRV}
+    ipv4-multi-target:
+    - {TTL: '2100', data: 1.2.3.5, type: A}
+    - {TTL: '2100', data: 1.2.3.6, type: A}
+    - {TTL: '2100', data: 1.2.3.7, type: A}
+- expected_addrs:
+  - {address: '[2607:f8b0:400a:801::1001]:1234', is_balancer: true}
+  expected_chosen_service_config: null
+  expected_lb_policy: null
+  record_to_resolve: srv-ipv6-single-target
+  records:
+    _grpclb._tcp.srv-ipv6-single-target:
+    - {TTL: '2100', data: 0 0 1234 ipv6-single-target, type: SRV}
+    ipv6-single-target:
+    - {TTL: '2100', data: '2607:f8b0:400a:801::1001', type: AAAA}
+- expected_addrs:
+  - {address: '[2607:f8b0:400a:801::1002]:1234', is_balancer: true}
+  - {address: '[2607:f8b0:400a:801::1003]:1234', is_balancer: true}
+  - {address: '[2607:f8b0:400a:801::1004]:1234', is_balancer: true}
+  expected_chosen_service_config: null
+  expected_lb_policy: null
+  record_to_resolve: srv-ipv6-multi-target
+  records:
+    _grpclb._tcp.srv-ipv6-multi-target:
+    - {TTL: '2100', data: 0 0 1234 ipv6-multi-target, type: SRV}
+    ipv6-multi-target:
+    - {TTL: '2100', data: '2607:f8b0:400a:801::1002', type: AAAA}
+    - {TTL: '2100', data: '2607:f8b0:400a:801::1003', type: AAAA}
+    - {TTL: '2100', data: '2607:f8b0:400a:801::1004', type: AAAA}
+- expected_addrs:
+  - {address: '1.2.3.4:1234', is_balancer: true}
+  expected_chosen_service_config: '{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"SimpleService","waitForReady":true}]}]}'
+  expected_lb_policy: round_robin
+  record_to_resolve: srv-ipv4-simple-service-config
+  records:
+    _grpclb._tcp.srv-ipv4-simple-service-config:
+    - {TTL: '2100', data: 0 0 1234 ipv4-simple-service-config, type: SRV}
+    ipv4-simple-service-config:
+    - {TTL: '2100', data: 1.2.3.4, type: A}
+    srv-ipv4-simple-service-config:
+    - {TTL: '2100', data: 'grpc_config=[{"serviceConfig":{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"SimpleService","waitForReady":true}]}]}}]',
+      type: TXT}
+- expected_addrs:
+  - {address: '1.2.3.4:443', is_balancer: false}
+  expected_chosen_service_config: '{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"NoSrvSimpleService","waitForReady":true}]}]}'
+  expected_lb_policy: round_robin
+  record_to_resolve: ipv4-no-srv-simple-service-config
+  records:
+    ipv4-no-srv-simple-service-config:
+    - {TTL: '2100', data: 1.2.3.4, type: A}
+    - {TTL: '2100', data: 'grpc_config=[{"serviceConfig":{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"NoSrvSimpleService","waitForReady":true}]}]}}]',
+      type: TXT}
+- expected_addrs:
+  - {address: '1.2.3.4:443', is_balancer: false}
+  expected_chosen_service_config: null
+  expected_lb_policy: null
+  record_to_resolve: ipv4-no-config-for-cpp
+  records:
+    ipv4-no-config-for-cpp:
+    - {TTL: '2100', data: 1.2.3.4, type: A}
+    - {TTL: '2100', data: 'grpc_config=[{"clientLanguage":["python"],"serviceConfig":{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"PythonService","waitForReady":true}]}]}}]',
+      type: TXT}
+- expected_addrs:
+  - {address: '1.2.3.4:443', is_balancer: false}
+  expected_chosen_service_config: null
+  expected_lb_policy: null
+  record_to_resolve: ipv4-cpp-config-has-zero-percentage
+  records:
+    ipv4-cpp-config-has-zero-percentage:
+    - {TTL: '2100', data: 1.2.3.4, type: A}
+    - {TTL: '2100', data: 'grpc_config=[{"percentage":0,"serviceConfig":{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"CppService","waitForReady":true}]}]}}]',
+      type: TXT}
+- expected_addrs:
+  - {address: '1.2.3.4:443', is_balancer: false}
+  expected_chosen_service_config: '{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"CppService","waitForReady":true}]}]}'
+  expected_lb_policy: round_robin
+  record_to_resolve: ipv4-second-language-is-cpp
+  records:
+    ipv4-second-language-is-cpp:
+    - {TTL: '2100', data: 1.2.3.4, type: A}
+    - {TTL: '2100', data: 'grpc_config=[{"clientLanguage":["go"],"serviceConfig":{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"GoService","waitForReady":true}]}]}},{"clientLanguage":["c++"],"serviceConfig":{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"CppService","waitForReady":true}]}]}}]',
+      type: TXT}
+- expected_addrs:
+  - {address: '1.2.3.4:443', is_balancer: false}
+  expected_chosen_service_config: '{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"AlwaysPickedService","waitForReady":true}]}]}'
+  expected_lb_policy: round_robin
+  record_to_resolve: ipv4-config-with-percentages
+  records:
+    ipv4-config-with-percentages:
+    - {TTL: '2100', data: 1.2.3.4, type: A}
+    - {TTL: '2100', data: 'grpc_config=[{"percentage":0,"serviceConfig":{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"NeverPickedService","waitForReady":true}]}]}},{"percentage":100,"serviceConfig":{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"AlwaysPickedService","waitForReady":true}]}]}}]',
+      type: TXT}
+- expected_addrs:
+  - {address: '1.2.3.4:1234', is_balancer: true}
+  - {address: '1.2.3.4:443', is_balancer: false}
+  expected_chosen_service_config: null
+  expected_lb_policy: null
+  record_to_resolve: srv-ipv4-target-has-backend-and-balancer
+  records:
+    _grpclb._tcp.srv-ipv4-target-has-backend-and-balancer:
+    - {TTL: '2100', data: 0 0 1234 balancer-for-ipv4-has-backend-and-balancer, type: SRV}
+    balancer-for-ipv4-has-backend-and-balancer:
+    - {TTL: '2100', data: 1.2.3.4, type: A}
+    srv-ipv4-target-has-backend-and-balancer:
+    - {TTL: '2100', data: 1.2.3.4, type: A}
+- expected_addrs:
+  - {address: '[2607:f8b0:400a:801::1002]:1234', is_balancer: true}
+  - {address: '[2607:f8b0:400a:801::1002]:443', is_balancer: false}
+  expected_chosen_service_config: null
+  expected_lb_policy: null
+  record_to_resolve: srv-ipv6-target-has-backend-and-balancer
+  records:
+    _grpclb._tcp.srv-ipv6-target-has-backend-and-balancer:
+    - {TTL: '2100', data: 0 0 1234 balancer-for-ipv6-has-backend-and-balancer, type: SRV}
+    balancer-for-ipv6-has-backend-and-balancer:
+    - {TTL: '2100', data: '2607:f8b0:400a:801::1002', type: AAAA}
+    srv-ipv6-target-has-backend-and-balancer:
+    - {TTL: '2100', data: '2607:f8b0:400a:801::1002', type: AAAA}
+- expected_addrs:
+  - {address: '1.2.3.4:443', is_balancer: false}
+  expected_chosen_service_config: '{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwo","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooThree","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooFour","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooFive","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooSix","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooSeven","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooEight","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooNine","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTen","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooEleven","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwelve","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwelve","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwelve","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwelve","service":"SimpleService","waitForReady":true}]}]}'
+  expected_lb_policy: null
+  record_to_resolve: ipv4-config-causing-fallback-to-tcp
+  records:
+    ipv4-config-causing-fallback-to-tcp:
+    - {TTL: '2100', data: 1.2.3.4, type: A}
+    - {TTL: '2100', data: 'grpc_config=[{"serviceConfig":{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwo","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooThree","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooFour","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooFive","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooSix","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooSeven","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooEight","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooNine","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTen","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooEleven","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwelve","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwelve","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwelve","service":"SimpleService","waitForReady":true}]},{"name":[{"method":"FooTwelve","service":"SimpleService","waitForReady":true}]}]}}]',
+      type: TXT}
diff --git a/test/cpp/naming/test_dns_server.py b/test/cpp/naming/test_dns_server.py
new file mode 100755
index 0000000000..9d4b89cffb
--- /dev/null
+++ b/test/cpp/naming/test_dns_server.py
@@ -0,0 +1,134 @@
+#!/usr/bin/env python2.7
+# Copyright 2015 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.
+
+"""Starts a local DNS server for use in tests"""
+
+import argparse
+import sys
+import yaml
+import signal
+import os
+
+import twisted
+import twisted.internet
+import twisted.internet.reactor
+import twisted.internet.threads
+import twisted.internet.defer
+import twisted.internet.protocol
+import twisted.names
+import twisted.names.client
+import twisted.names.dns
+import twisted.names.server
+from twisted.names import client, server, common, authority, dns
+import argparse
+
+_SERVER_HEALTH_CHECK_RECORD_NAME = 'health-check-local-dns-server-is-alive.resolver-tests.grpctestingexp' # missing end '.' for twisted syntax
+_SERVER_HEALTH_CHECK_RECORD_DATA = '123.123.123.123'
+
+class NoFileAuthority(authority.FileAuthority):
+  def __init__(self, soa, records):
+    # skip FileAuthority
+    common.ResolverBase.__init__(self)
+    self.soa = soa
+    self.records = records
+
+def start_local_dns_server(args):
+  all_records = {}
+  def _push_record(name, r):
+    print('pushing record: |%s|' % name)
+    if all_records.get(name) is not None:
+      all_records[name].append(r)
+      return
+    all_records[name] = [r]
+
+  def _maybe_split_up_txt_data(name, txt_data, r_ttl):
+    start = 0
+    txt_data_list = []
+    while len(txt_data[start:]) > 0:
+      next_read = len(txt_data[start:])
+      if next_read > 255:
+        next_read = 255
+      txt_data_list.append(txt_data[start:start+next_read])
+      start += next_read
+    _push_record(name, dns.Record_TXT(*txt_data_list, ttl=r_ttl))
+
+  with open(args.records_config_path) as config:
+    test_records_config = yaml.load(config)
+  common_zone_name = test_records_config['resolver_component_tests_common_zone_name']
+  for group in test_records_config['resolver_component_tests']:
+    for name in group['records'].keys():
+      for record in group['records'][name]:
+        r_type = record['type']
+        r_data = record['data']
+        r_ttl = int(record['TTL'])
+        record_full_name = '%s.%s' % (name, common_zone_name)
+        assert record_full_name[-1] == '.'
+        record_full_name = record_full_name[:-1]
+        if r_type == 'A':
+          _push_record(record_full_name, dns.Record_A(r_data, ttl=r_ttl))
+        if r_type == 'AAAA':
+          _push_record(record_full_name, dns.Record_AAAA(r_data, ttl=r_ttl))
+        if r_type == 'SRV':
+          p, w, port, target = r_data.split(' ')
+          p = int(p)
+          w = int(w)
+          port = int(port)
+          target_full_name = '%s.%s' % (target, common_zone_name)
+          r_data = '%s %s %s %s' % (p, w, port, target_full_name)
+          _push_record(record_full_name, dns.Record_SRV(p, w, port, target_full_name, ttl=r_ttl))
+        if r_type == 'TXT':
+          _maybe_split_up_txt_data(record_full_name, r_data, r_ttl)
+  # Server health check record
+  _push_record(_SERVER_HEALTH_CHECK_RECORD_NAME, dns.Record_A(_SERVER_HEALTH_CHECK_RECORD_DATA, ttl=0))
+  soa_record = dns.Record_SOA(mname = common_zone_name)
+  test_domain_com = NoFileAuthority(
+    soa = (common_zone_name, soa_record),
+    records = all_records,
+  )
+  server = twisted.names.server.DNSServerFactory(
+      authorities=[test_domain_com], verbose=2)
+  server.noisy = 2
+  twisted.internet.reactor.listenTCP(args.port, server)
+  dns_proto = twisted.names.dns.DNSDatagramProtocol(server)
+  dns_proto.noisy = 2
+  twisted.internet.reactor.listenUDP(args.port, dns_proto)
+  print('starting local dns server on 127.0.0.1:%s' % args.port)
+  print('starting twisted.internet.reactor')
+  twisted.internet.reactor.suggestThreadPoolSize(1)
+  twisted.internet.reactor.run()
+
+def _quit_on_signal(signum, _frame):
+  print('Received SIGNAL %d. Quitting with exit code 0' % signum)
+  twisted.internet.reactor.stop()
+  sys.stdout.flush()
+  sys.exit(0)
+
+def main():
+  argp = argparse.ArgumentParser(description='Local DNS Server for resolver tests')
+  argp.add_argument('-p', '--port', default=None, type=int,
+                    help='Port for DNS server to listen on for TCP and UDP.')
+  argp.add_argument('-r', '--records_config_path', default=None, type=str,
+                    help=('Directory of resolver_test_record_groups.yaml file. '
+                          'Defauls to path needed when the test is invoked as part of run_tests.py.'))
+  args = argp.parse_args()
+  signal.signal(signal.SIGALRM, _quit_on_signal)
+  signal.signal(signal.SIGTERM, _quit_on_signal)
+  signal.signal(signal.SIGINT, _quit_on_signal)
+  # Prevent zombies. Tests that use this server are short-lived.
+  signal.alarm(2 * 60)
+  start_local_dns_server(args)
+
+if __name__ == '__main__':
+  main()
diff --git a/test/cpp/qps/client_async.cc b/test/cpp/qps/client_async.cc
index 912c871482..f5807da81e 100644
--- a/test/cpp/qps/client_async.cc
+++ b/test/cpp/qps/client_async.cc
@@ -56,11 +56,7 @@ class ClientRpcContext {
   }
 
   virtual void Start(CompletionQueue* cq, const ClientConfig& config) = 0;
-  void lock() { mu_.lock(); }
-  void unlock() { mu_.unlock(); }
-
- private:
-  std::mutex mu_;
+  virtual void TryCancel() = 0;
 };
 
 template <class RequestType, class ResponseType>
@@ -73,7 +69,7 @@ class ClientRpcContextUnaryImpl : public ClientRpcContext {
           std::unique_ptr<grpc::ClientAsyncResponseReader<ResponseType>>(
               BenchmarkService::Stub*, grpc::ClientContext*, const RequestType&,
               CompletionQueue*)>
-          start_req,
+          prepare_req,
       std::function<void(grpc::Status, ResponseType*, HistogramEntry*)> on_done)
       : context_(),
         stub_(stub),
@@ -83,7 +79,7 @@ class ClientRpcContextUnaryImpl : public ClientRpcContext {
         next_state_(State::READY),
         callback_(on_done),
         next_issue_(next_issue),
-        start_req_(start_req) {}
+        prepare_req_(prepare_req) {}
   ~ClientRpcContextUnaryImpl() override {}
   void Start(CompletionQueue* cq, const ClientConfig& config) override {
     StartInternal(cq);
@@ -92,7 +88,8 @@ class ClientRpcContextUnaryImpl : public ClientRpcContext {
     switch (next_state_) {
       case State::READY:
         start_ = UsageTimer::Now();
-        response_reader_ = start_req_(stub_, &context_, req_, cq_);
+        response_reader_ = prepare_req_(stub_, &context_, req_, cq_);
+        response_reader_->StartCall();
         next_state_ = State::RESP_DONE;
         response_reader_->Finish(&response_, &status_,
                                  ClientRpcContext::tag(this));
@@ -111,10 +108,10 @@ class ClientRpcContextUnaryImpl : public ClientRpcContext {
   }
   void StartNewClone(CompletionQueue* cq) override {
     auto* clone = new ClientRpcContextUnaryImpl(stub_, req_, next_issue_,
-                                                start_req_, callback_);
-    std::lock_guard<ClientRpcContext> lclone(*clone);
+                                                prepare_req_, callback_);
     clone->StartInternal(cq);
   }
+  void TryCancel() override { context_.TryCancel(); }
 
  private:
   grpc::ClientContext context_;
@@ -130,7 +127,7 @@ class ClientRpcContextUnaryImpl : public ClientRpcContext {
   std::function<std::unique_ptr<grpc::ClientAsyncResponseReader<ResponseType>>(
       BenchmarkService::Stub*, grpc::ClientContext*, const RequestType&,
       CompletionQueue*)>
-      start_req_;
+      prepare_req_;
   grpc::Status status_;
   double start_;
   std::unique_ptr<grpc::ClientAsyncResponseReader<ResponseType>>
@@ -147,8 +144,6 @@ class ClientRpcContextUnaryImpl : public ClientRpcContext {
   }
 };
 
-typedef std::forward_list<ClientRpcContext*> context_list;
-
 template <class StubType, class RequestType>
 class AsyncClient : public ClientImpl<StubType, RequestType> {
   // Specify which protected members we are using since there is no
@@ -252,29 +247,14 @@ class AsyncClient : public ClientImpl<StubType, RequestType> {
       // this thread isn't supposed to shut down
       std::lock_guard<std::mutex> l(shutdown_state_[thread_idx]->mutex);
       if (shutdown_state_[thread_idx]->shutdown) {
-        // We want to delete the context. However, it is possible that
-        // another thread that just initiated an action on this
-        // context still has its lock even though the action on the
-        // context has completed. To delay for that, just grab the
-        // lock for serialization. Take a new scope.
-        { std::lock_guard<ClientRpcContext> lctx(*ctx); }
+        ctx->TryCancel();
         delete ctx;
         return true;
       }
-      bool del = false;
-
-      // Create a new scope for a lock_guard'ed region
-      {
-        std::lock_guard<ClientRpcContext> lctx(*ctx);
-        if (!ctx->RunNextState(ok, entry)) {
-          // The RPC and callback are done, so clone the ctx
-          // and kickstart the new one
-          ctx->StartNewClone(cli_cqs_[cq_[thread_idx]].get());
-          // set the old version to delete
-          del = true;
-        }
-      }
-      if (del) {
+      if (!ctx->RunNextState(ok, entry)) {
+        // The RPC and callback are done, so clone the ctx
+        // and kickstart the new one
+        ctx->StartNewClone(cli_cqs_[cq_[thread_idx]].get());
         delete ctx;
       }
       return true;
@@ -311,15 +291,15 @@ class AsyncUnaryClient final
     entry->set_status(s.error_code());
   }
   static std::unique_ptr<grpc::ClientAsyncResponseReader<SimpleResponse>>
-  StartReq(BenchmarkService::Stub* stub, grpc::ClientContext* ctx,
-           const SimpleRequest& request, CompletionQueue* cq) {
-    return stub->AsyncUnaryCall(ctx, request, cq);
+  PrepareReq(BenchmarkService::Stub* stub, grpc::ClientContext* ctx,
+             const SimpleRequest& request, CompletionQueue* cq) {
+    return stub->PrepareAsyncUnaryCall(ctx, request, cq);
   };
   static ClientRpcContext* SetupCtx(BenchmarkService::Stub* stub,
                                     std::function<gpr_timespec()> next_issue,
                                     const SimpleRequest& req) {
     return new ClientRpcContextUnaryImpl<SimpleRequest, SimpleResponse>(
-        stub, req, next_issue, AsyncUnaryClient::StartReq,
+        stub, req, next_issue, AsyncUnaryClient::PrepareReq,
         AsyncUnaryClient::CheckDone);
   }
 };
@@ -332,9 +312,8 @@ class ClientRpcContextStreamingPingPongImpl : public ClientRpcContext {
       std::function<gpr_timespec()> next_issue,
       std::function<std::unique_ptr<
           grpc::ClientAsyncReaderWriter<RequestType, ResponseType>>(
-          BenchmarkService::Stub*, grpc::ClientContext*, CompletionQueue*,
-          void*)>
-          start_req,
+          BenchmarkService::Stub*, grpc::ClientContext*, CompletionQueue*)>
+          prepare_req,
       std::function<void(grpc::Status, ResponseType*)> on_done)
       : context_(),
         stub_(stub),
@@ -344,7 +323,7 @@ class ClientRpcContextStreamingPingPongImpl : public ClientRpcContext {
         next_state_(State::INVALID),
         callback_(on_done),
         next_issue_(next_issue),
-        start_req_(start_req) {}
+        prepare_req_(prepare_req) {}
   ~ClientRpcContextStreamingPingPongImpl() override {}
   void Start(CompletionQueue* cq, const ClientConfig& config) override {
     StartInternal(cq, config.messages_per_stream());
@@ -407,10 +386,10 @@ class ClientRpcContextStreamingPingPongImpl : public ClientRpcContext {
   }
   void StartNewClone(CompletionQueue* cq) override {
     auto* clone = new ClientRpcContextStreamingPingPongImpl(
-        stub_, req_, next_issue_, start_req_, callback_);
-    std::lock_guard<ClientRpcContext> lclone(*clone);
+        stub_, req_, next_issue_, prepare_req_, callback_);
     clone->StartInternal(cq, messages_per_stream_);
   }
+  void TryCancel() override { context_.TryCancel(); }
 
  private:
   grpc::ClientContext context_;
@@ -432,10 +411,10 @@ class ClientRpcContextStreamingPingPongImpl : public ClientRpcContext {
   State next_state_;
   std::function<void(grpc::Status, ResponseType*)> callback_;
   std::function<gpr_timespec()> next_issue_;
-  std::function<std::unique_ptr<
-      grpc::ClientAsyncReaderWriter<RequestType, ResponseType>>(
-      BenchmarkService::Stub*, grpc::ClientContext*, CompletionQueue*, void*)>
-      start_req_;
+  std::function<
+      std::unique_ptr<grpc::ClientAsyncReaderWriter<RequestType, ResponseType>>(
+          BenchmarkService::Stub*, grpc::ClientContext*, CompletionQueue*)>
+      prepare_req_;
   grpc::Status status_;
   double start_;
   std::unique_ptr<grpc::ClientAsyncReaderWriter<RequestType, ResponseType>>
@@ -449,8 +428,9 @@ class ClientRpcContextStreamingPingPongImpl : public ClientRpcContext {
     cq_ = cq;
     messages_per_stream_ = messages_per_stream;
     messages_issued_ = 0;
+    stream_ = prepare_req_(stub_, &context_, cq);
     next_state_ = State::STREAM_IDLE;
-    stream_ = start_req_(stub_, &context_, cq, ClientRpcContext::tag(this));
+    stream_->StartCall(ClientRpcContext::tag(this));
   }
 };
 
@@ -469,9 +449,9 @@ class AsyncStreamingPingPongClient final
   static void CheckDone(grpc::Status s, SimpleResponse* response) {}
   static std::unique_ptr<
       grpc::ClientAsyncReaderWriter<SimpleRequest, SimpleResponse>>
-  StartReq(BenchmarkService::Stub* stub, grpc::ClientContext* ctx,
-           CompletionQueue* cq, void* tag) {
-    auto stream = stub->AsyncStreamingCall(ctx, cq, tag);
+  PrepareReq(BenchmarkService::Stub* stub, grpc::ClientContext* ctx,
+             CompletionQueue* cq) {
+    auto stream = stub->PrepareAsyncStreamingCall(ctx, cq);
     return stream;
   };
   static ClientRpcContext* SetupCtx(BenchmarkService::Stub* stub,
@@ -479,7 +459,7 @@ class AsyncStreamingPingPongClient final
                                     const SimpleRequest& req) {
     return new ClientRpcContextStreamingPingPongImpl<SimpleRequest,
                                                      SimpleResponse>(
-        stub, req, next_issue, AsyncStreamingPingPongClient::StartReq,
+        stub, req, next_issue, AsyncStreamingPingPongClient::PrepareReq,
         AsyncStreamingPingPongClient::CheckDone);
   }
 };
@@ -492,8 +472,8 @@ class ClientRpcContextStreamingFromClientImpl : public ClientRpcContext {
       std::function<gpr_timespec()> next_issue,
       std::function<std::unique_ptr<grpc::ClientAsyncWriter<RequestType>>(
           BenchmarkService::Stub*, grpc::ClientContext*, ResponseType*,
-          CompletionQueue*, void*)>
-          start_req,
+          CompletionQueue*)>
+          prepare_req,
       std::function<void(grpc::Status, ResponseType*)> on_done)
       : context_(),
         stub_(stub),
@@ -503,7 +483,7 @@ class ClientRpcContextStreamingFromClientImpl : public ClientRpcContext {
         next_state_(State::INVALID),
         callback_(on_done),
         next_issue_(next_issue),
-        start_req_(start_req) {}
+        prepare_req_(prepare_req) {}
   ~ClientRpcContextStreamingFromClientImpl() override {}
   void Start(CompletionQueue* cq, const ClientConfig& config) override {
     StartInternal(cq);
@@ -546,10 +526,10 @@ class ClientRpcContextStreamingFromClientImpl : public ClientRpcContext {
   }
   void StartNewClone(CompletionQueue* cq) override {
     auto* clone = new ClientRpcContextStreamingFromClientImpl(
-        stub_, req_, next_issue_, start_req_, callback_);
-    std::lock_guard<ClientRpcContext> lclone(*clone);
+        stub_, req_, next_issue_, prepare_req_, callback_);
     clone->StartInternal(cq);
   }
+  void TryCancel() override { context_.TryCancel(); }
 
  private:
   grpc::ClientContext context_;
@@ -570,17 +550,17 @@ class ClientRpcContextStreamingFromClientImpl : public ClientRpcContext {
   std::function<gpr_timespec()> next_issue_;
   std::function<std::unique_ptr<grpc::ClientAsyncWriter<RequestType>>(
       BenchmarkService::Stub*, grpc::ClientContext*, ResponseType*,
-      CompletionQueue*, void*)>
-      start_req_;
+      CompletionQueue*)>
+      prepare_req_;
   grpc::Status status_;
   double start_;
   std::unique_ptr<grpc::ClientAsyncWriter<RequestType>> stream_;
 
   void StartInternal(CompletionQueue* cq) {
     cq_ = cq;
-    stream_ = start_req_(stub_, &context_, &response_, cq,
-                         ClientRpcContext::tag(this));
+    stream_ = prepare_req_(stub_, &context_, &response_, cq);
     next_state_ = State::STREAM_IDLE;
+    stream_->StartCall(ClientRpcContext::tag(this));
   }
 };
 
@@ -597,10 +577,10 @@ class AsyncStreamingFromClientClient final
 
  private:
   static void CheckDone(grpc::Status s, SimpleResponse* response) {}
-  static std::unique_ptr<grpc::ClientAsyncWriter<SimpleRequest>> StartReq(
+  static std::unique_ptr<grpc::ClientAsyncWriter<SimpleRequest>> PrepareReq(
       BenchmarkService::Stub* stub, grpc::ClientContext* ctx,
-      SimpleResponse* resp, CompletionQueue* cq, void* tag) {
-    auto stream = stub->AsyncStreamingFromClient(ctx, resp, cq, tag);
+      SimpleResponse* resp, CompletionQueue* cq) {
+    auto stream = stub->PrepareAsyncStreamingFromClient(ctx, resp, cq);
     return stream;
   };
   static ClientRpcContext* SetupCtx(BenchmarkService::Stub* stub,
@@ -608,7 +588,7 @@ class AsyncStreamingFromClientClient final
                                     const SimpleRequest& req) {
     return new ClientRpcContextStreamingFromClientImpl<SimpleRequest,
                                                        SimpleResponse>(
-        stub, req, next_issue, AsyncStreamingFromClientClient::StartReq,
+        stub, req, next_issue, AsyncStreamingFromClientClient::PrepareReq,
         AsyncStreamingFromClientClient::CheckDone);
   }
 };
@@ -621,8 +601,8 @@ class ClientRpcContextStreamingFromServerImpl : public ClientRpcContext {
       std::function<gpr_timespec()> next_issue,
       std::function<std::unique_ptr<grpc::ClientAsyncReader<ResponseType>>(
           BenchmarkService::Stub*, grpc::ClientContext*, const RequestType&,
-          CompletionQueue*, void*)>
-          start_req,
+          CompletionQueue*)>
+          prepare_req,
       std::function<void(grpc::Status, ResponseType*)> on_done)
       : context_(),
         stub_(stub),
@@ -632,7 +612,7 @@ class ClientRpcContextStreamingFromServerImpl : public ClientRpcContext {
         next_state_(State::INVALID),
         callback_(on_done),
         next_issue_(next_issue),
-        start_req_(start_req) {}
+        prepare_req_(prepare_req) {}
   ~ClientRpcContextStreamingFromServerImpl() override {}
   void Start(CompletionQueue* cq, const ClientConfig& config) override {
     StartInternal(cq);
@@ -664,10 +644,10 @@ class ClientRpcContextStreamingFromServerImpl : public ClientRpcContext {
   }
   void StartNewClone(CompletionQueue* cq) override {
     auto* clone = new ClientRpcContextStreamingFromServerImpl(
-        stub_, req_, next_issue_, start_req_, callback_);
-    std::lock_guard<ClientRpcContext> lclone(*clone);
+        stub_, req_, next_issue_, prepare_req_, callback_);
     clone->StartInternal(cq);
   }
+  void TryCancel() override { context_.TryCancel(); }
 
  private:
   grpc::ClientContext context_;
@@ -682,8 +662,8 @@ class ClientRpcContextStreamingFromServerImpl : public ClientRpcContext {
   std::function<gpr_timespec()> next_issue_;
   std::function<std::unique_ptr<grpc::ClientAsyncReader<ResponseType>>(
       BenchmarkService::Stub*, grpc::ClientContext*, const RequestType&,
-      CompletionQueue*, void*)>
-      start_req_;
+      CompletionQueue*)>
+      prepare_req_;
   grpc::Status status_;
   double start_;
   std::unique_ptr<grpc::ClientAsyncReader<ResponseType>> stream_;
@@ -691,9 +671,9 @@ class ClientRpcContextStreamingFromServerImpl : public ClientRpcContext {
   void StartInternal(CompletionQueue* cq) {
     // TODO(vjpai): Add support to rate-pace this
     cq_ = cq;
+    stream_ = prepare_req_(stub_, &context_, req_, cq);
     next_state_ = State::STREAM_IDLE;
-    stream_ =
-        start_req_(stub_, &context_, req_, cq, ClientRpcContext::tag(this));
+    stream_->StartCall(ClientRpcContext::tag(this));
   }
 };
 
@@ -710,10 +690,10 @@ class AsyncStreamingFromServerClient final
 
  private:
   static void CheckDone(grpc::Status s, SimpleResponse* response) {}
-  static std::unique_ptr<grpc::ClientAsyncReader<SimpleResponse>> StartReq(
+  static std::unique_ptr<grpc::ClientAsyncReader<SimpleResponse>> PrepareReq(
       BenchmarkService::Stub* stub, grpc::ClientContext* ctx,
-      const SimpleRequest& req, CompletionQueue* cq, void* tag) {
-    auto stream = stub->AsyncStreamingFromServer(ctx, req, cq, tag);
+      const SimpleRequest& req, CompletionQueue* cq) {
+    auto stream = stub->PrepareAsyncStreamingFromServer(ctx, req, cq);
     return stream;
   };
   static ClientRpcContext* SetupCtx(BenchmarkService::Stub* stub,
@@ -721,7 +701,7 @@ class AsyncStreamingFromServerClient final
                                     const SimpleRequest& req) {
     return new ClientRpcContextStreamingFromServerImpl<SimpleRequest,
                                                        SimpleResponse>(
-        stub, req, next_issue, AsyncStreamingFromServerClient::StartReq,
+        stub, req, next_issue, AsyncStreamingFromServerClient::PrepareReq,
         AsyncStreamingFromServerClient::CheckDone);
   }
 };
@@ -733,8 +713,8 @@ class ClientRpcContextGenericStreamingImpl : public ClientRpcContext {
       std::function<gpr_timespec()> next_issue,
       std::function<std::unique_ptr<grpc::GenericClientAsyncReaderWriter>(
           grpc::GenericStub*, grpc::ClientContext*,
-          const grpc::string& method_name, CompletionQueue*, void*)>
-          start_req,
+          const grpc::string& method_name, CompletionQueue*)>
+          prepare_req,
       std::function<void(grpc::Status, ByteBuffer*)> on_done)
       : context_(),
         stub_(stub),
@@ -744,7 +724,7 @@ class ClientRpcContextGenericStreamingImpl : public ClientRpcContext {
         next_state_(State::INVALID),
         callback_(on_done),
         next_issue_(next_issue),
-        start_req_(start_req) {}
+        prepare_req_(prepare_req) {}
   ~ClientRpcContextGenericStreamingImpl() override {}
   void Start(CompletionQueue* cq, const ClientConfig& config) override {
     StartInternal(cq, config.messages_per_stream());
@@ -807,10 +787,10 @@ class ClientRpcContextGenericStreamingImpl : public ClientRpcContext {
   }
   void StartNewClone(CompletionQueue* cq) override {
     auto* clone = new ClientRpcContextGenericStreamingImpl(
-        stub_, req_, next_issue_, start_req_, callback_);
-    std::lock_guard<ClientRpcContext> lclone(*clone);
+        stub_, req_, next_issue_, prepare_req_, callback_);
     clone->StartInternal(cq, messages_per_stream_);
   }
+  void TryCancel() override { context_.TryCancel(); }
 
  private:
   grpc::ClientContext context_;
@@ -834,8 +814,8 @@ class ClientRpcContextGenericStreamingImpl : public ClientRpcContext {
   std::function<gpr_timespec()> next_issue_;
   std::function<std::unique_ptr<grpc::GenericClientAsyncReaderWriter>(
       grpc::GenericStub*, grpc::ClientContext*, const grpc::string&,
-      CompletionQueue*, void*)>
-      start_req_;
+      CompletionQueue*)>
+      prepare_req_;
   grpc::Status status_;
   double start_;
   std::unique_ptr<grpc::GenericClientAsyncReaderWriter> stream_;
@@ -850,9 +830,9 @@ class ClientRpcContextGenericStreamingImpl : public ClientRpcContext {
         "/grpc.testing.BenchmarkService/StreamingCall");
     messages_per_stream_ = messages_per_stream;
     messages_issued_ = 0;
+    stream_ = prepare_req_(stub_, &context_, kMethodName, cq);
     next_state_ = State::STREAM_IDLE;
-    stream_ = start_req_(stub_, &context_, kMethodName, cq,
-                         ClientRpcContext::tag(this));
+    stream_->StartCall(ClientRpcContext::tag(this));
   }
 };
 
@@ -874,17 +854,17 @@ class GenericAsyncStreamingClient final
 
  private:
   static void CheckDone(grpc::Status s, ByteBuffer* response) {}
-  static std::unique_ptr<grpc::GenericClientAsyncReaderWriter> StartReq(
+  static std::unique_ptr<grpc::GenericClientAsyncReaderWriter> PrepareReq(
       grpc::GenericStub* stub, grpc::ClientContext* ctx,
-      const grpc::string& method_name, CompletionQueue* cq, void* tag) {
-    auto stream = stub->Call(ctx, method_name, cq, tag);
+      const grpc::string& method_name, CompletionQueue* cq) {
+    auto stream = stub->PrepareCall(ctx, method_name, cq);
     return stream;
   };
   static ClientRpcContext* SetupCtx(grpc::GenericStub* stub,
                                     std::function<gpr_timespec()> next_issue,
                                     const ByteBuffer& req) {
     return new ClientRpcContextGenericStreamingImpl(
-        stub, req, next_issue, GenericAsyncStreamingClient::StartReq,
+        stub, req, next_issue, GenericAsyncStreamingClient::PrepareReq,
         GenericAsyncStreamingClient::CheckDone);
   }
 };
diff --git a/test/cpp/qps/report.cc b/test/cpp/qps/report.cc
index 3c99bda144..42ebeff41d 100644
--- a/test/cpp/qps/report.cc
+++ b/test/cpp/qps/report.cc
@@ -107,8 +107,8 @@ void GprLogReporter::ReportCoreStats(const char* name, int idx,
             grpc_stats_counter_name[i], data.counters[i]);
   }
   for (int i = 0; i < GRPC_STATS_HISTOGRAM_COUNT; i++) {
-    gpr_log(GPR_DEBUG, "%s[%d].%s = %lf/%lf/%lf (50/95/99%%-ile)", name, idx,
-            grpc_stats_histogram_name[i],
+    gpr_log(GPR_DEBUG, "%s[%d].%s = %.1lf/%.1lf/%.1lf (50/95/99%%-ile)", name,
+            idx, grpc_stats_histogram_name[i],
             grpc_stats_histo_percentile(&data, (grpc_stats_histograms)i, 50),
             grpc_stats_histo_percentile(&data, (grpc_stats_histograms)i, 95),
             grpc_stats_histo_percentile(&data, (grpc_stats_histograms)i, 99));
diff --git a/test/cpp/util/byte_buffer_test.cc b/test/cpp/util/byte_buffer_test.cc
index cac01a7307..8fb51bc663 100644
--- a/test/cpp/util/byte_buffer_test.cc
+++ b/test/cpp/util/byte_buffer_test.cc
@@ -93,7 +93,7 @@ TEST_F(ByteBufferTest, SerializationMakesCopy) {
   std::vector<Slice> slices;
   slices.push_back(Slice(hello, Slice::STEAL_REF));
   slices.push_back(Slice(world, Slice::STEAL_REF));
-  grpc_byte_buffer* send_buffer = nullptr;
+  ByteBuffer send_buffer;
   bool owned = false;
   ByteBuffer buffer(&slices[0], 2);
   slices.clear();
@@ -101,8 +101,7 @@ TEST_F(ByteBufferTest, SerializationMakesCopy) {
       buffer, &send_buffer, &owned);
   EXPECT_TRUE(status.ok());
   EXPECT_TRUE(owned);
-  EXPECT_TRUE(send_buffer != nullptr);
-  grpc_byte_buffer_destroy(send_buffer);
+  EXPECT_TRUE(send_buffer.Valid());
 }
 
 }  // namespace
diff --git a/test/distrib/cpp/run_distrib_test_cmake.sh b/test/distrib/cpp/run_distrib_test_cmake.sh
new file mode 100755
index 0000000000..ead8cc10bc
--- /dev/null
+++ b/test/distrib/cpp/run_distrib_test_cmake.sh
@@ -0,0 +1,67 @@
+#!/bin/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
+
+cd $(dirname $0)/../../..
+
+echo "deb http://ftp.debian.org/debian jessie-backports main" | tee /etc/apt/sources.list.d/jessie-backports.list
+apt-get update
+#apt-get install -t jessie-backports -y libc-ares-dev  # we need specifically version 1.12
+apt-get install -t jessie-backports -y libssl-dev
+
+# Install c-ares
+cd third_party/cares/cares
+git fetch origin
+git checkout cares-1_13_0
+mkdir -p cmake/build
+cd cmake/build
+cmake -DCMAKE_BUILD_TYPE=Release ../..
+make -j4 install
+cd ../../../../..
+rm -rf third_party/cares/cares  # wipe out to prevent influencing the grpc build
+
+# Install zlib
+cd third_party/zlib
+mkdir -p cmake/build
+cd cmake/build
+cmake -DCMAKE_BUILD_TYPE=Release ../..
+make -j4 install
+cd ../../../..
+rm -rf third_party/zlib  # wipe out to prevent influencing the grpc build
+
+# Install protobuf
+cd third_party/protobuf
+mkdir -p cmake/build
+cd cmake/build
+cmake -Dprotobuf_BUILD_TESTS=OFF -DCMAKE_BUILD_TYPE=Release ..
+make -j4 install
+cd ../../../..
+rm -rf third_party/protobuf  # wipe out to prevent influencing the grpc build
+
+# Install gRPC
+mkdir -p cmake/build
+cd cmake/build
+cmake -DgRPC_INSTALL=ON -DgRPC_BUILD_TESTS=OFF -DgRPC_PROTOBUF_PROVIDER=package -DgRPC_ZLIB_PROVIDER=package -DgRPC_CARES_PROVIDER=package -DgRPC_SSL_PROVIDER=package -DCMAKE_BUILD_TYPE=Release ../..
+make -j4 install
+cd ../..
+
+# Build helloworld example using cmake
+cd examples/cpp/helloworld
+mkdir -p cmake/build
+cd cmake/build
+cmake ../..
+make
+
diff --git a/test/distrib/cpp/run_distrib_test.sh b/test/distrib/cpp/run_distrib_test_routeguide.sh
index b043075d93..b043075d93 100755
--- a/test/distrib/cpp/run_distrib_test.sh
+++ b/test/distrib/cpp/run_distrib_test_routeguide.sh
diff --git a/tools/buildgen/generate_build_additions.sh b/tools/buildgen/generate_build_additions.sh
index 7649145f86..693c02fdb2 100644
--- a/tools/buildgen/generate_build_additions.sh
+++ b/tools/buildgen/generate_build_additions.sh
@@ -24,6 +24,7 @@ gen_build_yaml_dirs="  \
   test/core/bad_client \
   test/core/bad_ssl    \
   test/core/end2end    \
+  test/cpp/naming \
   test/cpp/qps"
 gen_build_files=""
 for gen_build_yaml in $gen_build_yaml_dirs
diff --git a/tools/buildgen/generate_projects.py b/tools/buildgen/generate_projects.py
index f885b26697..d29cd02152 100755
--- a/tools/buildgen/generate_projects.py
+++ b/tools/buildgen/generate_projects.py
@@ -34,6 +34,7 @@ argp.add_argument('build_files', nargs='+', default=[])
 argp.add_argument('--templates', nargs='+', default=[])
 argp.add_argument('--output_merged', default=None, type=str)
 argp.add_argument('--jobs', '-j', default=multiprocessing.cpu_count(), type=int)
+argp.add_argument('--base', default='.', type=str)
 args = argp.parse_args()
 
 json = args.build_files
@@ -69,7 +70,7 @@ jobs = []
 for template in reversed(sorted(templates)):
   root, f = os.path.split(template)
   if os.path.splitext(f)[1] == '.template':
-    out_dir = '.' + root[len('templates'):]
+    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)
@@ -84,7 +85,7 @@ for template in reversed(sorted(templates)):
       test[out] = tf[1]
       os.close(tf[0])
       cmd.append(test[out])
-    cmd.append(root + '/' + f)
+    cmd.append(args.base + '/' + root + '/' + f)
     jobs.append(jobset.JobSpec(cmd, shortname=out, timeout_seconds=None))
 
 jobset.run(pre_jobs, maxjobs=args.jobs)
diff --git a/tools/codegen/core/gen_static_metadata.py b/tools/codegen/core/gen_static_metadata.py
index 36d951ff70..b7edbbb454 100755
--- a/tools/codegen/core/gen_static_metadata.py
+++ b/tools/codegen/core/gen_static_metadata.py
@@ -374,8 +374,8 @@ for i, elem in enumerate(all_strs):
 
 
 def slice_def(i):
-  return ('{.refcount = &grpc_static_metadata_refcounts[%d], .data.refcounted ='
-          ' {g_bytes+%d, %d}}') % (
+  return ('{&grpc_static_metadata_refcounts[%d],'
+          ' {{g_bytes+%d, %d}}}') % (
       i, id2strofs[i], len(all_strs[i]))
 
 
diff --git a/tools/codegen/core/gen_stats_data.py b/tools/codegen/core/gen_stats_data.py
index 8e4ef594af..10ad0cc831 100755
--- a/tools/codegen/core/gen_stats_data.py
+++ b/tools/codegen/core/gen_stats_data.py
@@ -147,7 +147,8 @@ def gen_bucket_code(histogram):
     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
+  code = '\n/* Automatically generated by tools/codegen/core/gen_stats_data.py */\n'
+  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'
@@ -313,3 +314,97 @@ with open('src/core/lib/debug/stats_data.c', 'w') as C:
       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']))
+
+# 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())
+
+def FindNamed(js, name):
+  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
+
+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'
+      })
+
+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))
+
+# 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('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)
diff --git a/tools/distrib/python/grpcio_tools/setup.py b/tools/distrib/python/grpcio_tools/setup.py
index 5c0329bff0..e0e9226211 100644
--- a/tools/distrib/python/grpcio_tools/setup.py
+++ b/tools/distrib/python/grpcio_tools/setup.py
@@ -47,7 +47,7 @@ CLASSIFIERS = [
     'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: 3.6',
     'License :: OSI Approved :: Apache Software License',
-],
+]
 
 PY3 = sys.version_info.major == 3
 
diff --git a/tools/dockerfile/distribtest/cpp_jessie_x64/Dockerfile b/tools/dockerfile/distribtest/cpp_jessie_x64/Dockerfile
index ff66bca0ae..0e8186d40c 100644
--- a/tools/dockerfile/distribtest/cpp_jessie_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/cpp_jessie_x64/Dockerfile
@@ -27,4 +27,6 @@ RUN apt-get update && apt-get install -y \
       pkg-config \
       unzip && apt-get clean
 
+RUN apt-get update && apt-get install -y cmake golang && apt-get clean
+
 CMD ["bash"]
diff --git a/tools/dockerfile/distribtest/csharp_jessie_x64/Dockerfile b/tools/dockerfile/distribtest/csharp_jessie_x64/Dockerfile
index d13eecaa55..02ec4c278a 100644
--- a/tools/dockerfile/distribtest/csharp_jessie_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/csharp_jessie_x64/Dockerfile
@@ -14,18 +14,15 @@
 
 FROM debian:jessie
 
-RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
-RUN echo "deb http://download.mono-project.com/repo/debian wheezy main" | tee /etc/apt/sources.list.d/mono-xamarin.list
+RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
+RUN echo "deb http://download.mono-project.com/repo/debian jessie main" | tee /etc/apt/sources.list.d/mono-official.list
 RUN echo "deb http://download.mono-project.com/repo/debian wheezy-apache24-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
 RUN echo "deb http://download.mono-project.com/repo/debian wheezy-libjpeg62-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
-RUN echo "deb http://download.mono-project.com/repo/debian wheezy-libtiff-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
 
 RUN apt-get update && apt-get install -y \
     mono-devel \
     ca-certificates-mono \
-    nuget
+    nuget \
+    && apt-get clean
 
-# make sure we have nuget 2.12+ (in case there's an older cached docker image)
-RUN apt-get update && apt-get install -y nuget
-
-RUN apt-get update && apt-get install -y unzip
+RUN apt-get update && apt-get install -y unzip && apt-get clean
diff --git a/tools/dockerfile/distribtest/csharp_jessie_x86/Dockerfile b/tools/dockerfile/distribtest/csharp_jessie_x86/Dockerfile
index 71845b590b..758f314572 100644
--- a/tools/dockerfile/distribtest/csharp_jessie_x86/Dockerfile
+++ b/tools/dockerfile/distribtest/csharp_jessie_x86/Dockerfile
@@ -14,18 +14,15 @@
 
 FROM 32bit/debian:jessie
 
-RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
-RUN echo "deb http://download.mono-project.com/repo/debian wheezy main" | tee /etc/apt/sources.list.d/mono-xamarin.list
+RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
+RUN echo "deb http://download.mono-project.com/repo/debian jessie main" | tee /etc/apt/sources.list.d/mono-official.list
 RUN echo "deb http://download.mono-project.com/repo/debian wheezy-apache24-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
 RUN echo "deb http://download.mono-project.com/repo/debian wheezy-libjpeg62-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
-RUN echo "deb http://download.mono-project.com/repo/debian wheezy-libtiff-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
 
 RUN apt-get update && apt-get install -y \
     mono-devel \
     ca-certificates-mono \
-    nuget
+    nuget \
+    && apt-get clean
 
-# make sure we have nuget 2.12+ (in case there's an older cached docker image)
-RUN apt-get update && apt-get install -y nuget
-
-RUN apt-get update && apt-get install -y unzip
+RUN apt-get update && apt-get install -y unzip && apt-get clean
diff --git a/tools/dockerfile/distribtest/csharp_ubuntu1604_x64/Dockerfile b/tools/dockerfile/distribtest/csharp_ubuntu1604_x64/Dockerfile
index 6604caa42c..0f40f18e38 100644
--- a/tools/dockerfile/distribtest/csharp_ubuntu1604_x64/Dockerfile
+++ b/tools/dockerfile/distribtest/csharp_ubuntu1604_x64/Dockerfile
@@ -17,11 +17,16 @@ FROM ubuntu:16.04
 RUN apt-get update && apt-get install -y \
     mono-devel \
     ca-certificates-mono \
-    nuget
+    nuget \
+    && apt-get clean
 
 # make sure we have nuget 2.12+ (in case there's an older cached docker image)
 RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
 RUN echo "deb http://download.mono-project.com/repo/debian wheezy main" | tee /etc/apt/sources.list.d/mono-xamarin.list
-RUN apt-get update && apt-get install -y nuget
+RUN apt-get update && apt-get install -y nuget && apt-get clean
 
-RUN apt-get update && apt-get install -y unzip
+# Prevent "Error: SendFailure (Error writing headers)" when fetching nuget packages
+# See https://github.com/tianon/docker-brew-ubuntu-core/issues/86
+RUN apt-get update && apt-get install -y tzdata && apt-get clean
+
+RUN apt-get update && apt-get install -y unzip && apt-get clean
diff --git a/tools/dockerfile/grpc_clang_format/Dockerfile b/tools/dockerfile/grpc_clang_format/Dockerfile
index 647cb52a7b..dff07feeb6 100644
--- a/tools/dockerfile/grpc_clang_format/Dockerfile
+++ b/tools/dockerfile/grpc_clang_format/Dockerfile
@@ -12,12 +12,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM ubuntu:15.10
+FROM debian:jessie
 
 RUN apt-get update && apt-get -y install wget
-RUN echo deb http://llvm.org/apt/wily/ llvm-toolchain-wily-3.8 main >> /etc/apt/sources.list
-RUN echo deb-src http://llvm.org/apt/wily/ llvm-toolchain-wily-3.8 main >> /etc/apt/sources.list
-RUN wget -O - http://llvm.org/apt/llvm-snapshot.gpg.key| apt-key add -
+RUN echo "deb http://llvm.org/apt/jessie/ llvm-toolchain-jessie-3.8 main" >> /etc/apt/sources.list
+RUN echo "deb-src http://llvm.org/apt/jessie/ llvm-toolchain-jessie-3.8 main" >> /etc/apt/sources.list
+RUN wget -O - http://llvm.org/apt/llvm-snapshot.gpg.key | apt-key add -
 RUN apt-get update && apt-get -y install clang-format-3.8
 
 ADD clang_format_all_the_things.sh /
diff --git a/tools/dockerfile/interoptest/grpc_interop_csharp/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_csharp/Dockerfile
index 4ccfbc43c3..dbf58023c5 100644
--- a/tools/dockerfile/interoptest/grpc_interop_csharp/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_csharp/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -61,7 +62,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #================
 # C# dependencies
diff --git a/tools/dockerfile/interoptest/grpc_interop_cxx/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_cxx/Dockerfile
index 824ecf4604..7cfe98cbc8 100644
--- a/tools/dockerfile/interoptest/grpc_interop_cxx/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_cxx/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -61,7 +62,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #=================
 # C++ dependencies
diff --git a/tools/dockerfile/interoptest/grpc_interop_go/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_go/Dockerfile
index 5f7bedde73..febe2fa251 100644
--- a/tools/dockerfile/interoptest/grpc_interop_go/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_go/Dockerfile
@@ -30,7 +30,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 # Define the default command.
 CMD ["bash"]
diff --git a/tools/dockerfile/interoptest/grpc_interop_go1.7/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_go1.7/Dockerfile
index 2bfa87c4ea..3a516cbb62 100644
--- a/tools/dockerfile/interoptest/grpc_interop_go1.7/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_go1.7/Dockerfile
@@ -30,7 +30,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 # Define the default command.
 CMD ["bash"]
diff --git a/tools/dockerfile/interoptest/grpc_interop_go1.8/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_go1.8/Dockerfile
index 96391372ca..acb640a81d 100644
--- a/tools/dockerfile/interoptest/grpc_interop_go1.8/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_go1.8/Dockerfile
@@ -30,7 +30,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 # Define the default command.
 CMD ["bash"]
diff --git a/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile
index 27a924343f..354b7bfdb5 100644
--- a/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile
@@ -30,7 +30,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 RUN pip install twisted h2==2.6.1 hyper
 
diff --git a/tools/dockerfile/interoptest/grpc_interop_java/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_java/Dockerfile
index 264a0f9271..92a542ff76 100644
--- a/tools/dockerfile/interoptest/grpc_interop_java/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_java/Dockerfile
@@ -45,7 +45,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 
 # Trigger download of as many Gradle artifacts as possible.
diff --git a/tools/dockerfile/interoptest/grpc_interop_java_oracle8/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_java_oracle8/Dockerfile
index 264a0f9271..92a542ff76 100644
--- a/tools/dockerfile/interoptest/grpc_interop_java_oracle8/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_java_oracle8/Dockerfile
@@ -45,7 +45,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 
 # Trigger download of as many Gradle artifacts as possible.
diff --git a/tools/dockerfile/interoptest/grpc_interop_node/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_node/Dockerfile
index c59b12d155..4343d56cb4 100644
--- a/tools/dockerfile/interoptest/grpc_interop_node/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_node/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -61,7 +62,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #==================
 # Node dependencies
diff --git a/tools/dockerfile/interoptest/grpc_interop_php/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_php/Dockerfile
index f859a46514..d6e229f84a 100644
--- a/tools/dockerfile/interoptest/grpc_interop_php/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_php/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
diff --git a/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile
index 42b1107c11..271c6e75e9 100644
--- a/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -61,7 +62,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
diff --git a/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
index 3c744b434e..7bcada68e0 100644
--- a/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -61,7 +62,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #==================
 # Ruby dependencies
diff --git a/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile b/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
deleted file mode 100644
index 4ccfbc43c3..0000000000
--- a/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
+++ /dev/null
@@ -1,114 +0,0 @@
-# Copyright 2015 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.
-
-FROM debian:jessie
-
-# Install Git and basic packages.
-RUN apt-get update && apt-get install -y \
-  autoconf \
-  autotools-dev \
-  build-essential \
-  bzip2 \
-  ccache \
-  curl \
-  gcc \
-  gcc-multilib \
-  git \
-  golang \
-  gyp \
-  lcov \
-  libc6 \
-  libc6-dbg \
-  libc6-dev \
-  libgtest-dev \
-  libtool \
-  make \
-  perl \
-  strace \
-  python-dev \
-  python-setuptools \
-  python-yaml \
-  telnet \
-  unzip \
-  wget \
-  zip && apt-get clean
-
-#================
-# Build profiling
-RUN apt-get update && apt-get install -y time && apt-get clean
-
-#====================
-# Python dependencies
-
-# Install dependencies
-
-RUN apt-get update && apt-get install -y \
-    python-all-dev \
-    python3-all-dev \
-    python-pip
-
-# Install Python packages from PyPI
-RUN pip install pip --upgrade
-RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
-
-#================
-# C# dependencies
-
-# Update to a newer version of mono
-RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
-RUN echo "deb http://download.mono-project.com/repo/debian jessie main" | tee /etc/apt/sources.list.d/mono-official.list
-RUN echo "deb http://download.mono-project.com/repo/debian wheezy-apache24-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
-RUN echo "deb http://download.mono-project.com/repo/debian wheezy-libjpeg62-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
-
-# Install dependencies
-RUN apt-get update && apt-get -y dist-upgrade && apt-get install -y \
-    mono-devel \
-    ca-certificates-mono \
-    nuget \
-    && apt-get clean
-
-RUN nuget update -self
-
-# Install dotnet SDK based on https://www.microsoft.com/net/core#debian
-RUN apt-get update && apt-get install -y curl libunwind8 gettext
-# dotnet-dev-1.0.0-preview2-003131
-RUN curl -sSL -o dotnet100.tar.gz https://go.microsoft.com/fwlink/?LinkID=827530
-RUN mkdir -p /opt/dotnet && tar zxf dotnet100.tar.gz -C /opt/dotnet
-# dotnet-dev-1.0.1
-RUN curl -sSL -o dotnet101.tar.gz https://go.microsoft.com/fwlink/?LinkID=843453
-RUN mkdir -p /opt/dotnet && tar zxf dotnet101.tar.gz -C /opt/dotnet
-RUN ln -s /opt/dotnet/dotnet /usr/local/bin
-
-# Trigger the population of the local package cache
-ENV NUGET_XMLDOC_MODE skip
-RUN mkdir warmup \
-    && cd warmup \
-    && dotnet new \
-    && cd .. \
-    && rm -rf warmup
-
-# Prepare ccache
-RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
-RUN ln -s /usr/bin/ccache /usr/local/bin/g++
-RUN ln -s /usr/bin/ccache /usr/local/bin/cc
-RUN ln -s /usr/bin/ccache /usr/local/bin/c++
-RUN ln -s /usr/bin/ccache /usr/local/bin/clang
-RUN ln -s /usr/bin/ccache /usr/local/bin/clang++
-
-
-RUN mkdir /var/local/jenkins
-
-# Define the default command.
-CMD ["bash"]
diff --git a/tools/dockerfile/test/csharp_jessie_x64/Dockerfile b/tools/dockerfile/test/csharp_jessie_x64/Dockerfile
index 60dc7eb21a..40d46fcf58 100644
--- a/tools/dockerfile/test/csharp_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/csharp_jessie_x64/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -65,7 +66,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #================
 # C# dependencies
diff --git a/tools/dockerfile/test/cxx_jessie_x64/Dockerfile b/tools/dockerfile/test/cxx_jessie_x64/Dockerfile
index f9622dd757..888a37baca 100644
--- a/tools/dockerfile/test/cxx_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/cxx_jessie_x64/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -65,7 +66,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #=================
 # C++ dependencies
diff --git a/tools/dockerfile/test/cxx_jessie_x86/Dockerfile b/tools/dockerfile/test/cxx_jessie_x86/Dockerfile
index 2d396ce2ff..319f1e1889 100644
--- a/tools/dockerfile/test/cxx_jessie_x86/Dockerfile
+++ b/tools/dockerfile/test/cxx_jessie_x86/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -65,7 +66,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #=================
 # C++ dependencies
diff --git a/tools/dockerfile/test/cxx_ubuntu1404_x64/Dockerfile b/tools/dockerfile/test/cxx_ubuntu1404_x64/Dockerfile
index 349a6eff83..61f005d9da 100644
--- a/tools/dockerfile/test/cxx_ubuntu1404_x64/Dockerfile
+++ b/tools/dockerfile/test/cxx_ubuntu1404_x64/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -65,7 +66,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #=================
 # C++ dependencies
diff --git a/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile b/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile
index bccfdba7cd..f35247eccb 100644
--- a/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile
+++ b/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -65,7 +66,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #=================
 # C++ dependencies
diff --git a/tools/dockerfile/test/fuzzer/Dockerfile b/tools/dockerfile/test/fuzzer/Dockerfile
index 94c37b3f63..ce1badfeb1 100644
--- a/tools/dockerfile/test/fuzzer/Dockerfile
+++ b/tools/dockerfile/test/fuzzer/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -65,7 +66,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #=================
 # C++ dependencies
diff --git a/tools/dockerfile/test/multilang_jessie_x64/Dockerfile b/tools/dockerfile/test/multilang_jessie_x64/Dockerfile
index b7373b5d9c..59fe4d8f93 100644
--- a/tools/dockerfile/test/multilang_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/multilang_jessie_x64/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -122,7 +123,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 # Install coverage for Python test coverage reporting
 RUN pip install coverage
diff --git a/tools/dockerfile/test/node_jessie_x64/Dockerfile b/tools/dockerfile/test/node_jessie_x64/Dockerfile
index 31602e594e..103be8412b 100644
--- a/tools/dockerfile/test/node_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/node_jessie_x64/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -76,7 +77,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #==================
 # Node dependencies
diff --git a/tools/dockerfile/test/php7_jessie_x64/Dockerfile b/tools/dockerfile/test/php7_jessie_x64/Dockerfile
index e79305bb27..f6d426bcd6 100644
--- a/tools/dockerfile/test/php7_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/php7_jessie_x64/Dockerfile
@@ -77,7 +77,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
diff --git a/tools/dockerfile/test/php_jessie_x64/Dockerfile b/tools/dockerfile/test/php_jessie_x64/Dockerfile
index 245a642367..ae82a8d99f 100644
--- a/tools/dockerfile/test/php_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/php_jessie_x64/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -65,7 +66,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #=================
 # PHP dependencies
diff --git a/tools/dockerfile/test/python_jessie_x64/Dockerfile b/tools/dockerfile/test/python_jessie_x64/Dockerfile
index 5093b793b0..d5d781cd1a 100644
--- a/tools/dockerfile/test/python_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/python_jessie_x64/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -65,7 +66,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
diff --git a/tools/dockerfile/test/python_pyenv_x64/Dockerfile b/tools/dockerfile/test/python_pyenv_x64/Dockerfile
index ff8f0231cb..3b4ad12b6d 100644
--- a/tools/dockerfile/test/python_pyenv_x64/Dockerfile
+++ b/tools/dockerfile/test/python_pyenv_x64/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -65,7 +66,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 # Install dependencies for pyenv
 RUN apt-get update && apt-get install -y \
diff --git a/tools/dockerfile/test/ruby_jessie_x64/Dockerfile b/tools/dockerfile/test/ruby_jessie_x64/Dockerfile
index d77917c87f..3d879bb0c9 100644
--- a/tools/dockerfile/test/ruby_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/ruby_jessie_x64/Dockerfile
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -65,7 +66,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #==================
 # Ruby dependencies
diff --git a/tools/dockerfile/test/sanity/Dockerfile b/tools/dockerfile/test/sanity/Dockerfile
index 0f2f9ede58..dff979dc37 100644
--- a/tools/dockerfile/test/sanity/Dockerfile
+++ b/tools/dockerfile/test/sanity/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM ubuntu:15.10
+FROM debian:jessie
 
 # Install Git and basic packages.
 RUN apt-get update && apt-get install -y \
@@ -22,6 +22,7 @@ RUN apt-get update && apt-get install -y \
   bzip2 \
   ccache \
   curl \
+  dnsutils \
   gcc \
   gcc-multilib \
   git \
@@ -65,7 +66,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0
 
 #========================
 # Sanity test dependencies
@@ -81,19 +82,28 @@ RUN pip install simplejson mako
 
 #======================================
 # More sanity test dependencies (bazel)
-RUN apt-get install -y openjdk-8-jdk
-# Check out Bazel version 0.4.1 since this version allows running
-# ./compile.sh without a local protoc dependency
-# TODO(mattkwong): install dependencies to support latest Bazel version if newer
-# version is needed
-RUN git clone https://github.com/bazelbuild/bazel.git /bazel && \
-  cd /bazel && git checkout tags/0.4.1 && ./compile.sh
-RUN ln -s /bazel/output/bazel /bin/
+RUN echo "deb http://http.debian.net/debian jessie-backports main" >> /etc/apt/sources.list
+RUN apt-get update
+RUN apt-get install -y -t jessie-backports openjdk-8-jdk
+
+#========================
+# Bazel installation
+RUN echo "deb [arch=amd64] http://storage.googleapis.com/bazel-apt stable jdk1.8" > /etc/apt/sources.list.d/bazel.list
+RUN curl https://bazel.build/bazel-release.pub.gpg | apt-key add -
+RUN apt-get -y update
+RUN apt-get -y install bazel
+
+# Pin Bazel to 0.4.4
+# Installing Bazel via apt-get first is required before installing 0.4.4 to
+# allow gRPC to build without errors. See https://github.com/grpc/grpc/issues/10553
+RUN curl -fSsL -O https://github.com/bazelbuild/bazel/releases/download/0.4.4/bazel-0.4.4-installer-linux-x86_64.sh
+RUN chmod +x ./bazel-0.4.4-installer-linux-x86_64.sh
+RUN ./bazel-0.4.4-installer-linux-x86_64.sh
 
 RUN apt-get update && apt-get -y install wget
-RUN echo deb http://llvm.org/apt/wily/ llvm-toolchain-wily-3.8 main >> /etc/apt/sources.list
-RUN echo deb-src http://llvm.org/apt/wily/ llvm-toolchain-wily-3.8 main >> /etc/apt/sources.list
-RUN wget -O - http://llvm.org/apt/llvm-snapshot.gpg.key| apt-key add -
+RUN echo "deb http://llvm.org/apt/jessie/ llvm-toolchain-jessie-3.8 main" >> /etc/apt/sources.list
+RUN echo "deb-src http://llvm.org/apt/jessie/ llvm-toolchain-jessie-3.8 main" >> /etc/apt/sources.list
+RUN wget -O - http://llvm.org/apt/llvm-snapshot.gpg.key | apt-key add -
 RUN apt-get update && apt-get -y install clang-format-3.8
 
 # Prepare ccache
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index 62f113907d..d81b7b4d11 100644
--- a/tools/doxygen/Doxyfile.c++
+++ b/tools/doxygen/Doxyfile.c++
@@ -811,6 +811,7 @@ include/grpc++/impl/channel_argument_option.h \
 include/grpc++/impl/client_unary_call.h \
 include/grpc++/impl/codegen/async_stream.h \
 include/grpc++/impl/codegen/async_unary_call.h \
+include/grpc++/impl/codegen/byte_buffer.h \
 include/grpc++/impl/codegen/call.h \
 include/grpc++/impl/codegen/call_hook.h \
 include/grpc++/impl/codegen/channel_interface.h \
@@ -881,6 +882,7 @@ include/grpc/impl/codegen/atm.h \
 include/grpc/impl/codegen/atm_gcc_atomic.h \
 include/grpc/impl/codegen/atm_gcc_sync.h \
 include/grpc/impl/codegen/atm_windows.h \
+include/grpc/impl/codegen/byte_buffer.h \
 include/grpc/impl/codegen/byte_buffer_reader.h \
 include/grpc/impl/codegen/compression_types.h \
 include/grpc/impl/codegen/connectivity_state.h \
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index 3d6b9e645a..63a3a38bfc 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -811,6 +811,7 @@ include/grpc++/impl/channel_argument_option.h \
 include/grpc++/impl/client_unary_call.h \
 include/grpc++/impl/codegen/async_stream.h \
 include/grpc++/impl/codegen/async_unary_call.h \
+include/grpc++/impl/codegen/byte_buffer.h \
 include/grpc++/impl/codegen/call.h \
 include/grpc++/impl/codegen/call_hook.h \
 include/grpc++/impl/codegen/channel_interface.h \
@@ -882,6 +883,7 @@ include/grpc/impl/codegen/atm.h \
 include/grpc/impl/codegen/atm_gcc_atomic.h \
 include/grpc/impl/codegen/atm_gcc_sync.h \
 include/grpc/impl/codegen/atm_windows.h \
+include/grpc/impl/codegen/byte_buffer.h \
 include/grpc/impl/codegen/byte_buffer_reader.h \
 include/grpc/impl/codegen/compression_types.h \
 include/grpc/impl/codegen/connectivity_state.h \
@@ -943,6 +945,8 @@ src/core/lib/compression/algorithm_metadata.h \
 src/core/lib/compression/compression_internal.h \
 src/core/lib/compression/message_compress.h \
 src/core/lib/compression/stream_compression.h \
+src/core/lib/compression/stream_compression_gzip.h \
+src/core/lib/compression/stream_compression_identity.h \
 src/core/lib/debug/stats.h \
 src/core/lib/debug/stats_data.h \
 src/core/lib/debug/trace.h \
diff --git a/tools/doxygen/Doxyfile.core b/tools/doxygen/Doxyfile.core
index 632735342b..b8514fe311 100644
--- a/tools/doxygen/Doxyfile.core
+++ b/tools/doxygen/Doxyfile.core
@@ -811,6 +811,7 @@ include/grpc/impl/codegen/atm_gcc_sync.h \
 include/grpc/impl/codegen/atm_gcc_sync.h \
 include/grpc/impl/codegen/atm_windows.h \
 include/grpc/impl/codegen/atm_windows.h \
+include/grpc/impl/codegen/byte_buffer.h \
 include/grpc/impl/codegen/byte_buffer_reader.h \
 include/grpc/impl/codegen/compression_types.h \
 include/grpc/impl/codegen/connectivity_state.h \
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index 937da45eb8..e96df5e2ff 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -811,6 +811,7 @@ include/grpc/impl/codegen/atm_gcc_sync.h \
 include/grpc/impl/codegen/atm_gcc_sync.h \
 include/grpc/impl/codegen/atm_windows.h \
 include/grpc/impl/codegen/atm_windows.h \
+include/grpc/impl/codegen/byte_buffer.h \
 include/grpc/impl/codegen/byte_buffer_reader.h \
 include/grpc/impl/codegen/compression_types.h \
 include/grpc/impl/codegen/connectivity_state.h \
@@ -1079,6 +1080,10 @@ src/core/lib/compression/message_compress.c \
 src/core/lib/compression/message_compress.h \
 src/core/lib/compression/stream_compression.c \
 src/core/lib/compression/stream_compression.h \
+src/core/lib/compression/stream_compression_gzip.c \
+src/core/lib/compression/stream_compression_gzip.h \
+src/core/lib/compression/stream_compression_identity.c \
+src/core/lib/compression/stream_compression_identity.h \
 src/core/lib/debug/stats.c \
 src/core/lib/debug/stats.h \
 src/core/lib/debug/stats_data.c \
diff --git a/tools/gce/create_interop_worker.sh b/tools/gce/create_interop_worker.sh
index 76e4905272..3e59dc501a 100755
--- a/tools/gce/create_interop_worker.sh
+++ b/tools/gce/create_interop_worker.sh
@@ -33,7 +33,8 @@ gcloud compute instances create $INSTANCE_NAME \
     --machine-type n1-standard-16 \
     --image ubuntu-15-10 \
     --boot-disk-size 1000 \
-    --scopes https://www.googleapis.com/auth/xapi.zoo
+    --scopes https://www.googleapis.com/auth/xapi.zoo \
+    --tags=allow-ssh
 
 echo 'Created GCE instance, waiting 60 seconds for it to come online.'
 sleep 60
diff --git a/tools/gce/create_linux_performance_worker.sh b/tools/gce/create_linux_performance_worker.sh
index 7f53732c05..4270f5cbfb 100755
--- a/tools/gce/create_linux_performance_worker.sh
+++ b/tools/gce/create_linux_performance_worker.sh
@@ -36,7 +36,8 @@ gcloud compute instances create $INSTANCE_NAME \
     --image-project ubuntu-os-cloud \
     --image-family ubuntu-1704 \
     --boot-disk-size 300 \
-    --scopes https://www.googleapis.com/auth/bigquery
+    --scopes https://www.googleapis.com/auth/bigquery \
+    --tags=allow-ssh
 
 echo 'Created GCE instance, waiting 60 seconds for it to come online.'
 sleep 60
diff --git a/tools/gce/create_linux_worker.sh b/tools/gce/create_linux_worker.sh
index c96f3281fc..8bf44aa729 100755
--- a/tools/gce/create_linux_worker.sh
+++ b/tools/gce/create_linux_worker.sh
@@ -31,7 +31,8 @@ gcloud compute instances create $INSTANCE_NAME \
     --image=ubuntu-1510 \
     --image-project=grpc-testing \
     --boot-disk-size 1000 \
-    --scopes https://www.googleapis.com/auth/bigquery
+    --scopes https://www.googleapis.com/auth/bigquery \
+    --tags=allow-ssh
 
 echo 'Created GCE instance, waiting 60 seconds for it to come online.'
 sleep 60
diff --git a/tools/gce/linux_performance_worker_init.sh b/tools/gce/linux_performance_worker_init.sh
index 8f0a0f65c3..88d8de7402 100755
--- a/tools/gce/linux_performance_worker_init.sh
+++ b/tools/gce/linux_performance_worker_init.sh
@@ -128,6 +128,11 @@ ruby -v
 # Install bundler (prerequisite for gRPC Ruby)
 gem install bundler
 
+# PHP dependencies
+sudo apt-get install -y php php-dev phpunit php-pear unzip zlib1g-dev
+curl -sS https://getcomposer.org/installer | php
+sudo mv composer.phar /usr/local/bin/composer
+
 # Java dependencies - nothing as we already have Java JDK 8
 
 # Go dependencies
diff --git a/tools/internal_ci/helper_scripts/prepare_build_linux_perf_rc b/tools/internal_ci/helper_scripts/prepare_build_linux_perf_rc
index 1b7779caa8..dc3c75a6a1 100644
--- a/tools/internal_ci/helper_scripts/prepare_build_linux_perf_rc
+++ b/tools/internal_ci/helper_scripts/prepare_build_linux_perf_rc
@@ -19,4 +19,19 @@
 ulimit -n 32768
 ulimit -c unlimited
 
+# Performance PR testing needs GH API key and PR metadata to comment results
+if [ -n "$KOKORO_GITHUB_PULL_REQUEST_NUMBER" ]; then
+  set +x
+  sudo apt-get install -y jq
+  export ghprbTargetBranch=$(curl -s https://api.github.com/repos/grpc/grpc/pulls/$KOKORO_GITHUB_PULL_REQUEST_NUMBER | jq -r .base.ref)
+
+  gsutil cp gs://grpc-testing-secrets/github_credentials/oauth_token.txt ~/
+  # TODO(matt-kwong): rename this to GITHUB_OAUTH_TOKEN after Jenkins deprecation
+  export JENKINS_OAUTH_TOKEN=$(cat ~/oauth_token.txt)
+  export ghprbPullId=$KOKORO_GITHUB_PULL_REQUEST_NUMBER
+  set -x
+fi
+
+sudo pip install tabulate
+
 git submodule update --init
diff --git a/tools/internal_ci/helper_scripts/prepare_build_linux_rc b/tools/internal_ci/helper_scripts/prepare_build_linux_rc
index 91627d60cb..2ade8dac51 100644
--- a/tools/internal_ci/helper_scripts/prepare_build_linux_rc
+++ b/tools/internal_ci/helper_scripts/prepare_build_linux_rc
@@ -26,6 +26,7 @@ sudo service docker restart
 
 # Populate xdg-cache-home to workaround https://github.com/grpc/grpc/issues/11968
 sudo mkdir -p /tmp/xdg-cache-home
+PYTHONWARNINGS=ignore XDG_CACHE_HOME=/tmp/xdg-cache-home sudo -E pip install setuptools wheel
 PYTHONWARNINGS=ignore XDG_CACHE_HOME=/tmp/xdg-cache-home sudo -E pip install coverage==4.4 pylint==1.6.5
 
 # Download Docker images from DockerHub
diff --git a/tools/internal_ci/helper_scripts/prepare_build_macos_rc b/tools/internal_ci/helper_scripts/prepare_build_macos_rc
index f7fbec93ff..bec529f85e 100644
--- a/tools/internal_ci/helper_scripts/prepare_build_macos_rc
+++ b/tools/internal_ci/helper_scripts/prepare_build_macos_rc
@@ -31,35 +31,31 @@ ulimit -a
 pip install google-api-python-client --user python
 export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/GrpcTesting-d0eeee2db331.json
 
-# required to build protobuf
-brew install gflags
+# If this is a PR using RUN_TESTS_FLAGS var, then add flags to filter tests
+if [ -n "$KOKORO_GITHUB_PULL_REQUEST_NUMBER" ] && [ -n "$RUN_TESTS_FLAGS" ]; then
+  brew install jq
+  ghprbTargetBranch=$(curl -s https://api.github.com/repos/grpc/grpc/pulls/$KOKORO_GITHUB_PULL_REQUEST_NUMBER | jq -r .base.ref)
+  export RUN_TESTS_FLAGS="$RUN_TESTS_FLAGS --filter_pr_tests --base_branch origin/$ghprbTargetBranch"
+fi
 
 set +ex  # rvm script is very verbose and exits with errorcode
 source $HOME/.rvm/scripts/rvm
 set -e  # rvm commands are very verbose
-rvm install ruby-2.4
+rvm use ruby-2.4
 rvm osx-ssl-certs status all
 rvm osx-ssl-certs update all
 set -ex
 
-gem install bundler
-
 # cocoapods
 export LANG=en_US.UTF-8
-gem install cocoapods
-gem install xcpretty
 pod repo update  # needed by python
 
 # python
 brew install coreutils  # we need grealpath
 pip install virtualenv --user python
-pip install -U six tox setuptools --user python
+pip install -U six tox setuptools twisted pyyaml --user python
 export PYTHONPATH=/Library/Python/3.4/site-packages
 
-# python 3.4
-wget -q https://www.python.org/ftp/python/3.4.4/python-3.4.4-macosx10.6.pkg
-sudo installer -pkg python-3.4.4-macosx10.6.pkg -target /
-
 # set xcode version for Obj-C tests
 sudo xcode-select -switch /Applications/Xcode_8.2.1.app/Contents/Developer
 
diff --git a/tools/internal_ci/helper_scripts/prepare_build_windows.bat b/tools/internal_ci/helper_scripts/prepare_build_windows.bat
index 69e087e1db..f625755db9 100644
--- a/tools/internal_ci/helper_scripts/prepare_build_windows.bat
+++ b/tools/internal_ci/helper_scripts/prepare_build_windows.bat
@@ -18,6 +18,14 @@ set PATH=C:\tools\msys64\usr\bin;C:\Python27;%PATH%
 
 bash tools/internal_ci/helper_scripts/gen_report_index.sh
 
+@rem If this is a PR using RUN_TESTS_FLAGS var, then add flags to filter tests
+if defined KOKORO_GITHUB_PULL_REQUEST_NUMBER if defined RUN_TESTS_FLAGS (
+  chocolatey install -y jq
+  for /f "usebackq delims=" %%x in (`curl -s https://api.github.com/repos/grpc/grpc/pulls/%KOKORO_GITHUB_PULL_REQUEST_NUMBER% ^| jq -r .base.ref`) do ( 
+    set RUN_TESTS_FLAGS=%RUN_TESTS_FLAGS% --filter_pr_tests --base_branch origin/%%x
+  )
+)
+
 @rem Update DNS settings to:
 @rem 1. allow resolving metadata.google.internal hostname
 @rem 2. make fetching default GCE credential by oauth2client work
diff --git a/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_services/__init__.py b/tools/internal_ci/linux/grpc_line_count.cfg
index 5772620b60..5854d9c9c2 100644
--- a/src/python/grpcio_tests/tests/protoc_plugin/protos/invocation_testing/split_services/__init__.py
+++ b/tools/internal_ci/linux/grpc_line_count.cfg
@@ -1,4 +1,4 @@
-# Copyright 2016 gRPC authors.
+# 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.
@@ -11,3 +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.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/linux/grpc_line_count.sh"
+timeout_mins: 30
diff --git a/tools/internal_ci/linux/grpc_line_count.sh b/tools/internal_ci/linux/grpc_line_count.sh
new file mode 100755
index 0000000000..22e484ba2f
--- /dev/null
+++ b/tools/internal_ci/linux/grpc_line_count.sh
@@ -0,0 +1,29 @@
+#!/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.
+#
+# This script counts the numbers of line in gRPC's repo and uploads to BQ
+set -ex
+
+# Enter the gRPC repo root
+cd $(dirname $0)/../../..
+
+git submodule update --init
+
+# Install cloc
+git clone -b v1.72 https://github.com/AlDanial/cloc/ ~/cloc
+PERL_MM_USE_DEFAULT=1 sudo perl -MCPAN -e 'install Regexp::Common; install Algorithm::Diff'
+sudo make install -C ~/cloc/Unix
+
+./tools/line_count/collect-now.sh
diff --git a/tools/internal_ci/linux/grpc_microbenchmark_diff.sh b/tools/internal_ci/linux/grpc_microbenchmark_diff.sh
new file mode 100755
index 0000000000..58ffcf336b
--- /dev/null
+++ b/tools/internal_ci/linux/grpc_microbenchmark_diff.sh
@@ -0,0 +1,38 @@
+#!/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.
+#
+# This script is invoked by Jenkins and runs a diff on the microbenchmarks
+set -ex
+
+# List of benchmarks that provide good signal for analyzing performance changes in pull requests
+BENCHMARKS_TO_RUN="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"
+
+# Enter the gRPC repo root
+cd $(dirname $0)/../../..
+
+source tools/internal_ci/helper_scripts/prepare_build_linux_perf_rc
+
+tools/run_tests/start_port_server.py
+tools/jenkins/run_c_cpp_test.sh tools/profiling/microbenchmarks/bm_diff/bm_main.py \
+  -d origin/$ghprbTargetBranch \
+  -b $BENCHMARKS_TO_RUN || FAILED="true"
+
+# kill port_server.py to prevent the build from hanging
+ps aux | grep port_server\\.py | awk '{print $2}' | xargs kill -9
+
+if [ "$FAILED" != "" ]
+then
+  exit 1
+fi
diff --git a/tools/internal_ci/linux/grpc_performance_profile_daily.cfg b/tools/internal_ci/linux/grpc_performance_profile_daily.cfg
index 9831869edb..7320a19a76 100644
--- a/tools/internal_ci/linux/grpc_performance_profile_daily.cfg
+++ b/tools/internal_ci/linux/grpc_performance_profile_daily.cfg
@@ -19,7 +19,6 @@ build_file: "grpc/tools/internal_ci/linux/grpc_performance_profile_daily.sh"
 timeout_mins: 1440
 action {
   define_artifacts {
-    regex: "**"
     regex: "github/grpc/reports/**"
   }
 }
diff --git a/tools/internal_ci/linux/grpc_performance_profile_master.cfg b/tools/internal_ci/linux/grpc_performance_profile_master.cfg
index e4cefbc3f4..ccb8aabb38 100644
--- a/tools/internal_ci/linux/grpc_performance_profile_master.cfg
+++ b/tools/internal_ci/linux/grpc_performance_profile_master.cfg
@@ -19,7 +19,6 @@ build_file: "grpc/tools/internal_ci/linux/grpc_performance_profile_master.sh"
 timeout_mins: 600
 action {
   define_artifacts {
-    regex: "**"
     regex: "github/grpc/reports/**"
   }
 }
diff --git a/tools/internal_ci/linux/grpc_run_tests_matrix.sh b/tools/internal_ci/linux/grpc_run_tests_matrix.sh
index 028704b3ff..bd1430b741 100755
--- a/tools/internal_ci/linux/grpc_run_tests_matrix.sh
+++ b/tools/internal_ci/linux/grpc_run_tests_matrix.sh
@@ -20,4 +20,14 @@ cd $(dirname $0)/../../..
 
 source tools/internal_ci/helper_scripts/prepare_build_linux_rc
 
-tools/run_tests/run_tests_matrix.py $RUN_TESTS_FLAGS
+tools/run_tests/run_tests_matrix.py $RUN_TESTS_FLAGS || FAILED="true"
+
+# Reveal leftover processes that might be left behind by the build
+ps aux | grep -i kbuilder
+
+echo 'Exiting gRPC main test script.'
+
+if [ "$FAILED" != "" ]
+then
+  exit 1
+fi
diff --git a/tools/internal_ci/linux/grpc_trickle_diff.sh b/tools/internal_ci/linux/grpc_trickle_diff.sh
new file mode 100755
index 0000000000..624031afa7
--- /dev/null
+++ b/tools/internal_ci/linux/grpc_trickle_diff.sh
@@ -0,0 +1,42 @@
+#!/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.
+#
+# This script is invoked by Jenkins and runs a diff on the microbenchmarks
+set -ex
+
+# List of benchmarks that provide good signal for analyzing performance changes in pull requests
+BENCHMARKS_TO_RUN="cli_transport_stalls_per_iteration cli_stream_stalls_per_iteration svr_transport_stalls_per_iteration svr_stream_stalls_per_iteration"
+
+# Enter the gRPC repo root
+cd $(dirname $0)/../../..
+
+source tools/internal_ci/helper_scripts/prepare_build_linux_perf_rc
+
+tools/run_tests/start_port_server.py
+tools/jenkins/run_c_cpp_test.sh tools/profiling/microbenchmarks/bm_diff/bm_main.py \
+  -d origin/$ghprbTargetBranch \
+  -b bm_fullstack_trickle \
+  -l 4 \
+  -t $BENCHMARKS_TO_RUN \
+  --no-counters \
+  --pr_comment_name trickle || FAILED="true"
+
+# kill port_server.py to prevent the build from hanging
+ps aux | grep port_server\\.py | awk '{print $2}' | xargs kill -9
+
+if [ "$FAILED" != "" ]
+then
+  exit 1
+fi
diff --git a/tools/internal_ci/linux/pull_request/grpc_basictests_c_dbg.cfg b/tools/internal_ci/linux/pull_request/grpc_basictests_c_dbg.cfg
new file mode 100644
index 0000000000..577cb28ae5
--- /dev/null
+++ b/tools/internal_ci/linux/pull_request/grpc_basictests_c_dbg.cfg
@@ -0,0 +1,30 @@
+# 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.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/linux/grpc_run_tests_matrix.sh"
+timeout_mins: 240
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "github/grpc/reports/**"
+  }
+}
+
+env_vars {
+  key: "RUN_TESTS_FLAGS"
+  value: "-f basictests linux c dbg --inner_jobs 16 -j 1 --internal_ci --max_time=3600"
+}
diff --git a/tools/internal_ci/linux/pull_request/grpc_basictests_c_opt.cfg b/tools/internal_ci/linux/pull_request/grpc_basictests_c_opt.cfg
new file mode 100644
index 0000000000..9e0b724b2e
--- /dev/null
+++ b/tools/internal_ci/linux/pull_request/grpc_basictests_c_opt.cfg
@@ -0,0 +1,30 @@
+# 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.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/linux/grpc_run_tests_matrix.sh"
+timeout_mins: 240
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "github/grpc/reports/**"
+  }
+}
+
+env_vars {
+  key: "RUN_TESTS_FLAGS"
+  value: "-f basictests linux c opt --inner_jobs 16 -j 1 --internal_ci --max_time=3600"
+}
diff --git a/tools/internal_ci/linux/pull_request/grpc_basictests_cpp_dbg.cfg b/tools/internal_ci/linux/pull_request/grpc_basictests_cpp_dbg.cfg
new file mode 100644
index 0000000000..0fda74cf44
--- /dev/null
+++ b/tools/internal_ci/linux/pull_request/grpc_basictests_cpp_dbg.cfg
@@ -0,0 +1,30 @@
+# 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.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/linux/grpc_run_tests_matrix.sh"
+timeout_mins: 240
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "github/grpc/reports/**"
+  }
+}
+
+env_vars {
+  key: "RUN_TESTS_FLAGS"
+  value: "-f basictests linux c++ dbg --inner_jobs 16 -j 1 --internal_ci --max_time=3600"
+}
diff --git a/tools/internal_ci/linux/pull_request/grpc_basictests_cpp_opt.cfg b/tools/internal_ci/linux/pull_request/grpc_basictests_cpp_opt.cfg
new file mode 100644
index 0000000000..199a8905d9
--- /dev/null
+++ b/tools/internal_ci/linux/pull_request/grpc_basictests_cpp_opt.cfg
@@ -0,0 +1,30 @@
+# 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.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/linux/grpc_run_tests_matrix.sh"
+timeout_mins: 240
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "github/grpc/reports/**"
+  }
+}
+
+env_vars {
+  key: "RUN_TESTS_FLAGS"
+  value: "-f basictests linux c++ opt --inner_jobs 16 -j 1 --internal_ci --max_time=3600"
+}
diff --git a/tools/internal_ci/linux/pull_request/grpc_microbenchmark_diff.cfg b/tools/internal_ci/linux/pull_request/grpc_microbenchmark_diff.cfg
new file mode 100644
index 0000000000..9269c345f0
--- /dev/null
+++ b/tools/internal_ci/linux/pull_request/grpc_microbenchmark_diff.cfg
@@ -0,0 +1,25 @@
+# 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.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/linux/grpc_microbenchmark_diff.sh"
+timeout_mins: 120
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "github/grpc/reports/**"
+  }
+}
diff --git a/tools/internal_ci/linux/pull_request/grpc_trickle_diff.cfg b/tools/internal_ci/linux/pull_request/grpc_trickle_diff.cfg
new file mode 100644
index 0000000000..e86b3ab475
--- /dev/null
+++ b/tools/internal_ci/linux/pull_request/grpc_trickle_diff.cfg
@@ -0,0 +1,25 @@
+# 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.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/linux/grpc_trickle_diff.sh"
+timeout_mins: 120
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "github/grpc/reports/**"
+  }
+}
diff --git a/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_asan.cfg b/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_asan.cfg
index db9cb4f597..1daf7a514e 100644
--- a/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_asan.cfg
+++ b/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_asan.cfg
@@ -17,7 +17,7 @@
 
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/linux/grpc_run_tests_matrix.sh"
-timeout_mins: 1440
+timeout_mins: 240
 action {
   define_artifacts {
     regex: "**/*sponge_log.xml"
diff --git a/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_msan.cfg b/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_msan.cfg
index ba651d357c..a8503b7bcb 100644
--- a/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_msan.cfg
+++ b/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_msan.cfg
@@ -17,7 +17,7 @@
 
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/linux/grpc_run_tests_matrix.sh"
-timeout_mins: 1440
+timeout_mins: 240
 action {
   define_artifacts {
     regex: "**/*sponge_log.xml"
diff --git a/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_tsan.cfg b/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_tsan.cfg
index ccbd95ae63..12af4581eb 100644
--- a/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_tsan.cfg
+++ b/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_tsan.cfg
@@ -17,7 +17,7 @@
 
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/linux/grpc_run_tests_matrix.sh"
-timeout_mins: 1440
+timeout_mins: 240
 action {
   define_artifacts {
     regex: "**/*sponge_log.xml"
diff --git a/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_ubsan.cfg b/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_ubsan.cfg
index c240d3a573..0d3803bf23 100644
--- a/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_ubsan.cfg
+++ b/tools/internal_ci/linux/sanitizer/pull_request/grpc_c_ubsan.cfg
@@ -17,7 +17,7 @@
 
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/linux/grpc_run_tests_matrix.sh"
-timeout_mins: 1440
+timeout_mins: 240
 action {
   define_artifacts {
     regex: "**/*sponge_log.xml"
diff --git a/tools/internal_ci/linux/sanitizer/pull_request/grpc_cpp_asan.cfg b/tools/internal_ci/linux/sanitizer/pull_request/grpc_cpp_asan.cfg
index 38db2f4f60..557561810b 100644
--- a/tools/internal_ci/linux/sanitizer/pull_request/grpc_cpp_asan.cfg
+++ b/tools/internal_ci/linux/sanitizer/pull_request/grpc_cpp_asan.cfg
@@ -17,7 +17,7 @@
 
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/linux/grpc_run_tests_matrix.sh"
-timeout_mins: 1440
+timeout_mins: 240
 action {
   define_artifacts {
     regex: "**/*sponge_log.xml"
diff --git a/tools/internal_ci/macos/grpc_basictests_dbg.cfg b/tools/internal_ci/macos/grpc_basictests_dbg.cfg
index f058f0c7e4..53bda1ff0a 100644
--- a/tools/internal_ci/macos/grpc_basictests_dbg.cfg
+++ b/tools/internal_ci/macos/grpc_basictests_dbg.cfg
@@ -27,5 +27,5 @@ action {
 
 env_vars {
   key: "RUN_TESTS_FLAGS"
-  value: "-f basictests macos dbg --internal_ci -j 1 --inner_jobs 4"
+  value: "-f basictests macos dbg --internal_ci -j 1 --inner_jobs 4 --bq_result_table aggregate_results"
 }
diff --git a/tools/internal_ci/macos/grpc_basictests_opt.cfg b/tools/internal_ci/macos/grpc_basictests_opt.cfg
index 5048baaf48..d359eb601a 100644
--- a/tools/internal_ci/macos/grpc_basictests_opt.cfg
+++ b/tools/internal_ci/macos/grpc_basictests_opt.cfg
@@ -27,5 +27,5 @@ action {
 
 env_vars {
   key: "RUN_TESTS_FLAGS"
-  value: "-f basictests macos opt --internal_ci -j 1 --inner_jobs 4"
+  value: "-f basictests macos opt --internal_ci -j 1 --inner_jobs 4 --bq_result_table aggregate_results"
 }
diff --git a/tools/internal_ci/macos/grpc_build_artifacts.sh b/tools/internal_ci/macos/grpc_build_artifacts.sh
index 603c15f210..09784e3bb4 100755
--- a/tools/internal_ci/macos/grpc_build_artifacts.sh
+++ b/tools/internal_ci/macos/grpc_build_artifacts.sh
@@ -20,25 +20,13 @@ cd $(dirname $0)/../../..
 
 source tools/internal_ci/helper_scripts/prepare_build_macos_rc
 
-# python 3.5
-wget -q https://www.python.org/ftp/python/3.5.2/python-3.5.2-macosx10.6.pkg
-sudo installer -pkg python-3.5.2-macosx10.6.pkg -target /
-
 # install cython for all python versions
 python2.7 -m pip install cython setuptools wheel
 python3.4 -m pip install cython setuptools wheel
 python3.5 -m pip install cython setuptools wheel
 python3.6 -m pip install cython setuptools wheel
 
-# node-gyp (needed for node artifacts)
-npm install -g node-gyp
-
-# php dependencies: pecl
-curl -O http://pear.php.net/go-pear.phar
-sudo php -d detect_unicode=0 go-pear.phar
-
 # needed to build ruby artifacts
-gem install rake-compiler
 wget https://raw.githubusercontent.com/grpc/grpc/master/tools/distrib/build_ruby_environment_macos.sh
 bash build_ruby_environment_macos.sh
 
diff --git a/tools/internal_ci/macos/grpc_run_tests_matrix.sh b/tools/internal_ci/macos/grpc_run_tests_matrix.sh
index 9a43e4869b..8e7fd54a62 100755
--- a/tools/internal_ci/macos/grpc_run_tests_matrix.sh
+++ b/tools/internal_ci/macos/grpc_run_tests_matrix.sh
@@ -25,6 +25,11 @@ tools/run_tests/run_tests_matrix.py $RUN_TESTS_FLAGS || FAILED="true"
 # kill port_server.py to prevent the build from hanging
 ps aux | grep port_server\\.py | awk '{print $2}' | xargs kill -9
 
+# Reveal leftover processes that might be left behind by the build
+ps aux | grep -i kbuilder
+
+echo 'Exiting gRPC main test script.'
+
 if [ "$FAILED" != "" ]
 then
   exit 1
diff --git a/tools/internal_ci/windows/grpc_build_artifacts.bat b/tools/internal_ci/windows/grpc_build_artifacts.bat
index 17d9571d43..c6e523697c 100644
--- a/tools/internal_ci/windows/grpc_build_artifacts.bat
+++ b/tools/internal_ci/windows/grpc_build_artifacts.bat
@@ -19,8 +19,6 @@ rename C:\Python34_32bit Python34_32bits
 rename C:\Python35_32bit Python35_32bits
 rename C:\Python36_32bit Python36_32bits
 
-pacman -S --noconfirm mingw64/mingw-w64-x86_64-gcc mingw32/mingw-w64-i686-gcc
-
 @rem enter repo root
 cd /d %~dp0\..\..\..
 
diff --git a/tools/internal_ci/windows/grpc_run_tests_matrix.bat b/tools/internal_ci/windows/grpc_run_tests_matrix.bat
index 08d834f8b0..10627add25 100644
--- a/tools/internal_ci/windows/grpc_run_tests_matrix.bat
+++ b/tools/internal_ci/windows/grpc_run_tests_matrix.bat
@@ -17,8 +17,10 @@ cd /d %~dp0\..\..\..
 
 call tools/internal_ci/helper_scripts/prepare_build_windows.bat
 
-python tools/run_tests/run_tests_matrix.py %RUN_TESTS_FLAGS% || goto :error
-goto :EOF
+python tools/run_tests/run_tests_matrix.py %RUN_TESTS_FLAGS%
+set RUNTESTS_EXITCODE=%errorlevel%
 
-:error
-exit /b %errorlevel%
+@rem Reveal leftover processes that might be left behind by the build
+tasklist /V
+
+exit /b %RUNTESTS_EXITCODE%
diff --git a/tools/internal_ci/windows/pull_request/grpc_basictests_dbg.cfg b/tools/internal_ci/windows/pull_request/grpc_basictests_dbg.cfg
new file mode 100644
index 0000000000..81a1e9d3c8
--- /dev/null
+++ b/tools/internal_ci/windows/pull_request/grpc_basictests_dbg.cfg
@@ -0,0 +1,30 @@
+# 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.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/windows/grpc_run_tests_matrix.bat"
+timeout_mins: 240
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "github/grpc/reports/**"
+  }
+}
+
+env_vars {
+  key: "RUN_TESTS_FLAGS"
+  value: "-f basictests windows dbg -j 1 --inner_jobs 8 --internal_ci --max_time=3600"
+}
diff --git a/tools/internal_ci/windows/pull_request/grpc_basictests_opt.cfg b/tools/internal_ci/windows/pull_request/grpc_basictests_opt.cfg
new file mode 100644
index 0000000000..3bb6510ca7
--- /dev/null
+++ b/tools/internal_ci/windows/pull_request/grpc_basictests_opt.cfg
@@ -0,0 +1,30 @@
+# 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.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/windows/grpc_run_tests_matrix.bat"
+timeout_mins: 240
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "github/grpc/reports/**"
+  }
+}
+
+env_vars {
+  key: "RUN_TESTS_FLAGS"
+  value: "-f basictests windows opt -j 1 --inner_jobs 8 --internal_ci --max_time=3600"
+}
diff --git a/tools/jenkins/run_full_performance.sh b/tools/jenkins/run_full_performance.sh
index 0f101f6da9..a9661c7e26 100755
--- a/tools/jenkins/run_full_performance.sh
+++ b/tools/jenkins/run_full_performance.sh
@@ -21,7 +21,7 @@ cd $(dirname $0)/../..
 
 # run 8core client vs 8core server
 tools/run_tests/run_performance_tests.py \
-    -l c++ csharp node ruby java python go node_express \
+    -l c++ csharp node ruby java python go node_express php \
     --netperf \
     --category scalable \
     --bq_result_table performance_test.performance_experiment \
diff --git a/tools/profiling/microbenchmarks/bm2bq.py b/tools/profiling/microbenchmarks/bm2bq.py
index 0797f3e21d..9f9b672f75 100755
--- a/tools/profiling/microbenchmarks/bm2bq.py
+++ b/tools/profiling/microbenchmarks/bm2bq.py
@@ -22,42 +22,15 @@ import sys
 import json
 import csv
 import bm_json
+import json
+import subprocess
+
+columns = []
 
-columns = [
-  ('jenkins_build', 'integer'),
-  ('jenkins_job', 'string'),
-  ('date', 'timestamp'),
-  ('cpu_scaling_enabled', 'boolean'),
-  ('num_cpus', 'integer'),
-  ('mhz_per_cpu', 'integer'),
-  ('library_build_type', 'string'),
-  ('name', 'string'),
-  ('fixture', 'string'),
-  ('client_mutator', 'string'),
-  ('server_mutator', 'string'),
-  ('request_size', 'integer'),
-  ('response_size', 'integer'),
-  ('request_count', 'integer'),
-  ('iterations', 'integer'),
-  ('time_unit', 'string'),
-  ('real_time', 'integer'),
-  ('cpu_time', 'integer'),
-  ('bytes_per_second', 'float'),
-  ('allocs_per_iteration', 'float'),
-  ('locks_per_iteration', 'float'),
-  ('writes_per_iteration', 'float'),
-  ('bandwidth_kilobits', 'integer'),
-  ('cli_transport_stalls_per_iteration', 'float'),
-  ('cli_stream_stalls_per_iteration', 'float'),
-  ('svr_transport_stalls_per_iteration', 'float'),
-  ('svr_stream_stalls_per_iteration', 'float'),
-  ('atm_cas_per_iteration', 'float'),
-  ('atm_add_per_iteration', 'float'),
-  ('end_of_stream', 'boolean'),
-  ('header_bytes_per_iteration', 'float'),
-  ('framing_bytes_per_iteration', 'float'),
-  ('nows_per_iteration', 'float'),
-]
+for row in json.loads(
+    subprocess.check_output([
+      'bq','--format=json','show','microbenchmarks.microbenchmarks']))['schema']['fields']:
+  columns.append((row['name'], row['type'].lower()))
 
 SANITIZE = {
   'integer': int,
diff --git a/tools/profiling/microbenchmarks/bm_diff/bm_constants.py b/tools/profiling/microbenchmarks/bm_diff/bm_constants.py
index ad79a0a197..f8989b17fc 100644
--- a/tools/profiling/microbenchmarks/bm_diff/bm_constants.py
+++ b/tools/profiling/microbenchmarks/bm_diff/bm_constants.py
@@ -28,4 +28,4 @@ _INTERESTING = ('cpu_time', 'real_time', 'locks_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',)
+        'svr_stream_stalls_per_iteration', 'http2_pings_sent_per_iteration')
diff --git a/tools/run_tests/artifacts/artifact_targets.py b/tools/run_tests/artifacts/artifact_targets.py
index 12263282ae..2cc0dfceab 100644
--- a/tools/run_tests/artifacts/artifact_targets.py
+++ b/tools/run_tests/artifacts/artifact_targets.py
@@ -158,6 +158,7 @@ class PythonArtifact:
       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):
diff --git a/tools/run_tests/artifacts/distribtest_targets.py b/tools/run_tests/artifacts/distribtest_targets.py
index fa461efa85..797ed51c7f 100644
--- a/tools/run_tests/artifacts/distribtest_targets.py
+++ b/tools/run_tests/artifacts/distribtest_targets.py
@@ -105,7 +105,9 @@ class CSharpDistribTest(object):
           use_workspace=True)
     elif self.platform == 'windows':
       if self.arch == 'x64':
-        environ={'MSBUILD_EXTRA_ARGS': '/p:Platform=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'}
@@ -255,12 +257,13 @@ class PHPDistribTest(object):
 class CppDistribTest(object):
   """Tests Cpp make intall by building examples."""
 
-  def __init__(self, platform, arch, docker_suffix=None):
-    self.name = 'cpp_%s_%s_%s' % (platform, arch, docker_suffix)
+  def __init__(self, platform, arch, docker_suffix=None, testcase=None):
+    self.name = 'cpp_%s_%s_%s_%s' % (platform, arch, docker_suffix, testcase)
     self.platform = platform
     self.arch = arch
     self.docker_suffix = docker_suffix
-    self.labels = ['distribtest', 'cpp', platform, arch, docker_suffix]
+    self.testcase = testcase
+    self.labels = ['distribtest', 'cpp', platform, arch, docker_suffix, testcase]
 
   def pre_build_jobspecs(self):
     return []
@@ -271,7 +274,7 @@ class CppDistribTest(object):
                                    'tools/dockerfile/distribtest/cpp_%s_%s' % (
                                        self.docker_suffix,
                                        self.arch),
-                                   'test/distrib/cpp/run_distrib_test.sh')
+                                   'test/distrib/cpp/run_distrib_test_%s.sh' % self.testcase)
     else:
       raise Exception("Not supported yet.")
 
@@ -281,7 +284,8 @@ class CppDistribTest(object):
 
 def targets():
   """Gets list of supported targets"""
-  return [CppDistribTest('linux', 'x64', 'jessie'),
+  return [CppDistribTest('linux', 'x64', 'jessie', 'routeguide'),
+          CppDistribTest('linux', 'x64', 'jessie', 'cmake'),
           CSharpDistribTest('linux', 'x64', 'wheezy'),
           CSharpDistribTest('linux', 'x64', 'jessie'),
           CSharpDistribTest('linux', 'x86', 'jessie'),
diff --git a/tools/run_tests/artifacts/package_targets.py b/tools/run_tests/artifacts/package_targets.py
index 0da13864f0..671d0f7b45 100644
--- a/tools/run_tests/artifacts/package_targets.py
+++ b/tools/run_tests/artifacts/package_targets.py
@@ -78,7 +78,7 @@ class CSharpPackage:
     if self.linux:
       return create_docker_jobspec(
           self.name,
-          'tools/dockerfile/test/csharp_coreclr_x64',
+          'tools/dockerfile/test/csharp_jessie_x64',
           'src/csharp/build_packages_dotnetcli.sh')
     else:
       return create_jobspec(self.name,
diff --git a/tools/run_tests/generated/sources_and_headers.json b/tools/run_tests/generated/sources_and_headers.json
index dafd922441..1e34dc6b7a 100644
--- a/tools/run_tests/generated/sources_and_headers.json
+++ b/tools/run_tests/generated/sources_and_headers.json
@@ -5631,6 +5631,86 @@
     "deps": [
       "gpr", 
       "gpr_test_util", 
+      "grpc++_test_config", 
+      "grpc++_test_util_unsecure", 
+      "grpc++_unsecure", 
+      "grpc_test_util_unsecure", 
+      "grpc_unsecure"
+    ], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "c++", 
+    "name": "resolver_component_test_unsecure", 
+    "src": [
+      "test/cpp/naming/resolver_component_test.cc"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc++", 
+      "grpc++_test_config", 
+      "grpc++_test_util", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "c++", 
+    "name": "resolver_component_test", 
+    "src": [
+      "test/cpp/naming/resolver_component_test.cc"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc++", 
+      "grpc++_test_config", 
+      "grpc++_test_util", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "c++", 
+    "name": "resolver_component_tests_runner_invoker_unsecure", 
+    "src": [
+      "test/cpp/naming/resolver_component_tests_runner_invoker.cc"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc++", 
+      "grpc++_test_config", 
+      "grpc++_test_util", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "c++", 
+    "name": "resolver_component_tests_runner_invoker", 
+    "src": [
+      "test/cpp/naming/resolver_component_tests_runner_invoker.cc"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
       "grpc", 
       "grpc_test_util"
     ], 
@@ -7928,6 +8008,8 @@
       "src/core/lib/compression/compression_internal.c", 
       "src/core/lib/compression/message_compress.c", 
       "src/core/lib/compression/stream_compression.c", 
+      "src/core/lib/compression/stream_compression_gzip.c", 
+      "src/core/lib/compression/stream_compression_identity.c", 
       "src/core/lib/debug/stats.c", 
       "src/core/lib/debug/stats_data.c", 
       "src/core/lib/http/format_request.c", 
@@ -8081,6 +8163,8 @@
       "src/core/lib/compression/compression_internal.h", 
       "src/core/lib/compression/message_compress.h", 
       "src/core/lib/compression/stream_compression.h", 
+      "src/core/lib/compression/stream_compression_gzip.h", 
+      "src/core/lib/compression/stream_compression_identity.h", 
       "src/core/lib/debug/stats.h", 
       "src/core/lib/debug/stats_data.h", 
       "src/core/lib/http/format_request.h", 
@@ -8213,6 +8297,8 @@
       "src/core/lib/compression/compression_internal.h", 
       "src/core/lib/compression/message_compress.h", 
       "src/core/lib/compression/stream_compression.h", 
+      "src/core/lib/compression/stream_compression_gzip.h", 
+      "src/core/lib/compression/stream_compression_identity.h", 
       "src/core/lib/debug/stats.h", 
       "src/core/lib/debug/stats_data.h", 
       "src/core/lib/http/format_request.h", 
@@ -8398,6 +8484,7 @@
       "gpr_codegen"
     ], 
     "headers": [
+      "include/grpc/impl/codegen/byte_buffer.h", 
       "include/grpc/impl/codegen/byte_buffer_reader.h", 
       "include/grpc/impl/codegen/compression_types.h", 
       "include/grpc/impl/codegen/connectivity_state.h", 
@@ -8411,6 +8498,7 @@
     "language": "c", 
     "name": "grpc_codegen", 
     "src": [
+      "include/grpc/impl/codegen/byte_buffer.h", 
       "include/grpc/impl/codegen/byte_buffer_reader.h", 
       "include/grpc/impl/codegen/compression_types.h", 
       "include/grpc/impl/codegen/connectivity_state.h", 
@@ -9289,6 +9377,7 @@
     "headers": [
       "include/grpc++/impl/codegen/async_stream.h", 
       "include/grpc++/impl/codegen/async_unary_call.h", 
+      "include/grpc++/impl/codegen/byte_buffer.h", 
       "include/grpc++/impl/codegen/call.h", 
       "include/grpc++/impl/codegen/call_hook.h", 
       "include/grpc++/impl/codegen/channel_interface.h", 
@@ -9323,6 +9412,7 @@
     "src": [
       "include/grpc++/impl/codegen/async_stream.h", 
       "include/grpc++/impl/codegen/async_unary_call.h", 
+      "include/grpc++/impl/codegen/byte_buffer.h", 
       "include/grpc++/impl/codegen/call.h", 
       "include/grpc++/impl/codegen/call_hook.h", 
       "include/grpc++/impl/codegen/channel_interface.h", 
diff --git a/tools/run_tests/generated/tests.json b/tools/run_tests/generated/tests.json
index 1bb7a4aa24..72dfbc0b98 100644
--- a/tools/run_tests/generated/tests.json
+++ b/tools/run_tests/generated/tests.json
@@ -4406,6 +4406,52 @@
   }, 
   {
     "args": [
+      "--test_bin_name=resolver_component_test_unsecure", 
+      "--running_under_bazel=false"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "gtest": false, 
+    "language": "c++", 
+    "name": "resolver_component_tests_runner_invoker_unsecure", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "--test_bin_name=resolver_component_test", 
+      "--running_under_bazel=false"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "gtest": false, 
+    "language": "c++", 
+    "name": "resolver_component_tests_runner_invoker", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "third_party/boringssl/crypto/aes/aes_tests.txt"
     ], 
     "boringssl": true, 
@@ -49905,7 +49951,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_unary_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_unary_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -49955,7 +50001,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -50005,7 +50051,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -50105,7 +50151,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -50205,7 +50251,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_client_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_client_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -50255,7 +50301,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_client_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_client_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -50305,7 +50351,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_server_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_server_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -50355,7 +50401,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_server_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_server_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -50759,7 +50805,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_unary_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_unary_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -50809,7 +50855,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -50859,7 +50905,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -50959,7 +51005,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -51059,7 +51105,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_client_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_client_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -51109,7 +51155,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_client_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_client_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -51159,7 +51205,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_server_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_server_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 16, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -51209,7 +51255,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_server_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_server_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -51884,7 +51930,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_unary_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_unary_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -51960,7 +52006,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -52036,7 +52082,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -52188,7 +52234,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -52340,7 +52386,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_client_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_client_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -52416,7 +52462,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_client_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_client_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -52492,7 +52538,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_server_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_server_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -52568,7 +52614,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_server_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_server_qps_unconstrained_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -53180,7 +53226,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_unary_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_unary_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -53256,7 +53302,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -53332,7 +53378,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -53484,7 +53530,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -53636,7 +53682,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_client_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_client_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -53712,7 +53758,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_client_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_client_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -53788,7 +53834,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_server_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_sync_streaming_from_server_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"SYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"SYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -53864,7 +53910,7 @@
   {
     "args": [
       "--scenarios_json", 
-      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_server_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 0, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 0, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_server_qps_unconstrained_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"security_params\": null, \"threads_per_cq\": 3, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 0, \"client_config\": {\"security_params\": null, \"channel_args\": [{\"str_value\": \"throughput\", \"name\": \"grpc.optimization_target\"}, {\"int_value\": 1, \"name\": \"grpc.minimal_stack\"}], \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING_FROM_SERVER\", \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"threads_per_cq\": 3, \"load_params\": {\"closed_loop\": {}}, \"client_type\": \"ASYNC_CLIENT\", \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
     "ci_platforms": [
diff --git a/tools/run_tests/performance/bq_upload_result.py b/tools/run_tests/performance/bq_upload_result.py
index 630ac23196..31819d6159 100755
--- a/tools/run_tests/performance/bq_upload_result.py
+++ b/tools/run_tests/performance/bq_upload_result.py
@@ -24,6 +24,7 @@ import os
 import sys
 import time
 import uuid
+import massage_qps_stats
 
 
 gcp_utils_dir = os.path.abspath(os.path.join(
@@ -117,6 +118,7 @@ def _flatten_result_inplace(scenario_result):
   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):
diff --git a/tools/run_tests/performance/massage_qps_stats.py b/tools/run_tests/performance/massage_qps_stats.py
new file mode 100644
index 0000000000..e1620adad2
--- /dev/null
+++ b/tools/run_tests/performance/massage_qps_stats.py
@@ -0,0 +1,196 @@
+# 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.
+
+# 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_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_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_executor_threads_created"] = massage_qps_stats_helpers.counter(core_stats, "executor_threads_created")
+    stats["core_executor_threads_used"] = massage_qps_stats_helpers.counter(core_stats, "executor_threads_used")
+    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")
+    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, "executor_closures_per_wakeup")
+    stats["core_executor_closures_per_wakeup"] = ",".join("%f" % x for x in h.buckets)
+    stats["core_executor_closures_per_wakeup_bkts"] = ",".join("%f" % x for x in h.boundaries)
+    stats["core_executor_closures_per_wakeup_50p"] = massage_qps_stats_helpers.percentile(h.buckets, 50, h.boundaries)
+    stats["core_executor_closures_per_wakeup_95p"] = massage_qps_stats_helpers.percentile(h.buckets, 95, h.boundaries)
+    stats["core_executor_closures_per_wakeup_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
new file mode 100644
index 0000000000..a2fe4ae6c3
--- /dev/null
+++ b/tools/run_tests/performance/massage_qps_stats_helpers.py
@@ -0,0 +1,57 @@
+# 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
+
+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]))
+
+def percentile(buckets, pctl, boundaries):
+  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))
+
+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)
diff --git a/src/python/grpcio_tests/tests/unit/_sanity/__init__.py b/tools/run_tests/performance/run_worker_php.sh
index 5772620b60..5d0c4fa4fd 100644..100755
--- a/src/python/grpcio_tests/tests/unit/_sanity/__init__.py
+++ b/tools/run_tests/performance/run_worker_php.sh
@@ -1,4 +1,5 @@
-# Copyright 2016 gRPC authors.
+#!/bin/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.
@@ -11,3 +12,17 @@
 # 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.
+
+source ~/.rvm/scripts/rvm
+set -ex
+
+repo=$(dirname $0)/../../..
+
+# First set up all dependences needed for PHP QPS test
+cd $repo
+cd src/php/tests/qps
+composer install
+# The proxy worker for PHP is implemented in Ruby
+cd ../../../..
+ruby src/ruby/qps/proxy-worker.rb $@
+
diff --git a/tools/run_tests/performance/scenario_config.py b/tools/run_tests/performance/scenario_config.py
index cbcc4d0ecc..5efc9f5648 100644
--- a/tools/run_tests/performance/scenario_config.py
+++ b/tools/run_tests/performance/scenario_config.py
@@ -453,6 +453,8 @@ class CXXLanguage:
               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
@@ -798,6 +800,33 @@ class RubyLanguage:
     return 'ruby'
 
 
+class PhpLanguage:
+
+  def __init__(self):
+    pass
+    self.safename = str(self)
+
+  def worker_cmdline(self):
+    return ['tools/run_tests/performance/run_worker_php.sh']
+
+  def worker_port_offset(self):
+    return 800
+
+  def scenarios(self):
+    yield _ping_pong_scenario(
+        'php_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(
+        'php_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)
+
+  def __str__(self):
+    return 'php'
+
+
 class JavaLanguage:
 
   def __init__(self):
@@ -995,6 +1024,7 @@ LANGUAGES = {
     'node' : NodeLanguage(),
     'node_express': NodeExpressLanguage(),
     'ruby' : RubyLanguage(),
+    'php' : PhpLanguage(),
     'java' : JavaLanguage(),
     'python' : PythonLanguage(),
     'go' : GoLanguage(),
diff --git a/tools/run_tests/performance/scenario_result_schema.json b/tools/run_tests/performance/scenario_result_schema.json
index d7e2e292a7..c7b1904bd1 100644
--- a/tools/run_tests/performance/scenario_result_schema.json
+++ b/tools/run_tests/performance/scenario_result_schema.json
@@ -1,269 +1,1869 @@
 [
   {
-    "name": "metadata",
-    "type": "RECORD",
-    "mode": "NULLABLE",
     "fields": [
       {
-        "name": "buildNumber",
-        "type": "INTEGER",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "buildUrl",
-        "type": "STRING",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "jobName",
-        "type": "STRING",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "gitCommit",
-        "type": "STRING",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "gitActualCommit",
-        "type": "STRING",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "created",
-        "type": "TIMESTAMP",
-        "mode": "NULLABLE"
+        "mode": "NULLABLE", 
+        "name": "buildNumber", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "buildUrl", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "jobName", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "gitCommit", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "gitActualCommit", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "created", 
+        "type": "TIMESTAMP"
       }
-    ]
-  },
+    ], 
+    "mode": "NULLABLE", 
+    "name": "metadata", 
+    "type": "RECORD"
+  }, 
   {
-    "name": "scenario",
-    "type": "RECORD",
-    "mode": "NULLABLE",
     "fields": [
       {
-        "name": "name",
-        "type": "STRING",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "clientConfig",
-        "type": "STRING",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "numClients",
-        "type": "INTEGER",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "serverConfig",
-        "type": "STRING",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "numServers",
-        "type": "INTEGER",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "warmupSeconds",
-        "type": "INTEGER",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "benchmarkSeconds",
-        "type": "INTEGER",
-        "mode": "NULLABLE"
+        "mode": "NULLABLE", 
+        "name": "name", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "clientConfig", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "numClients", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "serverConfig", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "numServers", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "warmupSeconds", 
+        "type": "INTEGER"
+      }, 
+      {
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+        "name": "benchmarkSeconds", 
+        "type": "INTEGER"
       }
-    ]
-  },
+    ], 
+    "mode": "NULLABLE", 
+    "name": "scenario", 
+    "type": "RECORD"
+  }, 
   {
-    "name": "latencies",
-    "type": "STRING",
-    "mode": "NULLABLE"
-  },
+    "mode": "NULLABLE", 
+    "name": "latencies", 
+    "type": "STRING"
+  }, 
   {
-    "name": "clientStats",
-    "type": "RECORD",
-    "mode": "REPEATED",
     "fields": [
       {
-        "name": "latencies",
-        "type": "STRING",
-        "mode": "NULLABLE"
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-        "mode": "NULLABLE"
-      },
-      {
-        "name": "cqPollCount",
-        "type": "INTEGER",
-        "mode": "NULLABLE"
+        "mode": "NULLABLE", 
+        "name": "latencies", 
+        "type": "STRING"
+      }, 
+      {
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+        "name": "timeElapsed", 
+        "type": "FLOAT"
+      }, 
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+        "name": "timeUser", 
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+        "name": "cqPollCount", 
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+        "name": "core_client_calls_created", 
+        "type": "INTEGER"
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+        "name": "core_server_calls_created", 
+        "type": "INTEGER"
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+        "name": "core_cqs_created", 
+        "type": "INTEGER"
+      }, 
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+        "name": "core_client_channels_created", 
+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "name": "core_http2_initiate_write_due_to_bdp_estimator_ping", 
+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "name": "core_http2_initiate_write_due_to_force_rst_stream", 
+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "name": "core_hpack_recv_lithdr_nvridx", 
+        "type": "INTEGER"
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+        "name": "core_hpack_recv_lithdr_nvridx_v", 
+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "name": "core_hpack_recv_binary", 
+        "type": "INTEGER"
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+        "name": "core_hpack_recv_binary_base64", 
+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "name": "core_hpack_send_lithdr_nvridx", 
+        "type": "INTEGER"
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+        "name": "core_hpack_send_lithdr_nvridx_v", 
+        "type": "INTEGER"
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+        "name": "core_hpack_send_huffman", 
+        "type": "INTEGER"
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+        "name": "core_hpack_send_binary", 
+        "type": "INTEGER"
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+        "name": "core_hpack_send_binary_base64", 
+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "name": "core_combiner_locks_scheduled_items", 
+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "type": "INTEGER"
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+        "name": "core_executor_scheduled_long_items", 
+        "type": "INTEGER"
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+        "name": "core_executor_scheduled_to_self", 
+        "type": "INTEGER"
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+        "name": "core_executor_wakeup_initiated", 
+        "type": "INTEGER"
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+      {
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+        "name": "core_executor_queue_drained", 
+        "type": "INTEGER"
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+      {
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+        "name": "core_executor_push_retries", 
+        "type": "INTEGER"
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+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_threads_created", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_threads_used", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_requested_calls", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_slowpath_requests_queued", 
+        "type": "INTEGER"
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+      {
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+        "name": "core_call_initial_size", 
+        "type": "STRING"
+      }, 
+      {
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+        "name": "core_call_initial_size_bkts", 
+        "type": "STRING"
+      }, 
+      {
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+        "name": "core_call_initial_size_50p", 
+        "type": "FLOAT"
+      }, 
+      {
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+        "name": "core_call_initial_size_95p", 
+        "type": "FLOAT"
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+      {
+        "mode": "NULLABLE", 
+        "name": "core_call_initial_size_99p", 
+        "type": "FLOAT"
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+        "name": "core_poll_events_returned", 
+        "type": "STRING"
+      }, 
+      {
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+        "name": "core_poll_events_returned_bkts", 
+        "type": "STRING"
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+        "name": "core_poll_events_returned_50p", 
+        "type": "FLOAT"
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+      {
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+        "name": "core_poll_events_returned_95p", 
+        "type": "FLOAT"
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+      {
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+        "name": "core_poll_events_returned_99p", 
+        "type": "FLOAT"
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+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_size", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_size_bkts", 
+        "type": "STRING"
+      }, 
+      {
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+        "name": "core_tcp_write_size_50p", 
+        "type": "FLOAT"
+      }, 
+      {
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+        "name": "core_tcp_write_size_95p", 
+        "type": "FLOAT"
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+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_size_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_iov_size", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_iov_size_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_iov_size_50p", 
+        "type": "FLOAT"
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+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_iov_size_95p", 
+        "type": "FLOAT"
+      }, 
+      {
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+        "name": "core_tcp_write_iov_size_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_size", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_size_bkts", 
+        "type": "STRING"
+      }, 
+      {
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+        "name": "core_tcp_read_size_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_size_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_size_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_bkts", 
+        "type": "STRING"
+      }, 
+      {
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+        "name": "core_tcp_read_offer_50p", 
+        "type": "FLOAT"
+      }, 
+      {
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+        "name": "core_tcp_read_offer_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_iov_size", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_iov_size_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_iov_size_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_iov_size_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_iov_size_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_message_size", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_message_size_bkts", 
+        "type": "STRING"
+      }, 
+      {
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+        "name": "core_http2_send_message_size_50p", 
+        "type": "FLOAT"
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+      {
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+        "name": "core_http2_send_message_size_95p", 
+        "type": "FLOAT"
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+      {
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+        "name": "core_http2_send_message_size_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_initial_metadata_per_write", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_initial_metadata_per_write_bkts", 
+        "type": "STRING"
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+      {
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+        "name": "core_http2_send_initial_metadata_per_write_50p", 
+        "type": "FLOAT"
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+      {
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+        "name": "core_http2_send_initial_metadata_per_write_95p", 
+        "type": "FLOAT"
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+      {
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+        "name": "core_http2_send_initial_metadata_per_write_99p", 
+        "type": "FLOAT"
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+      {
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+        "name": "core_http2_send_message_per_write", 
+        "type": "STRING"
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+      {
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+        "name": "core_http2_send_message_per_write_bkts", 
+        "type": "STRING"
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+      {
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+        "name": "core_http2_send_message_per_write_50p", 
+        "type": "FLOAT"
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+      {
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+        "name": "core_http2_send_message_per_write_95p", 
+        "type": "FLOAT"
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+      {
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+        "name": "core_http2_send_message_per_write_99p", 
+        "type": "FLOAT"
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+      {
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+        "name": "core_http2_send_trailing_metadata_per_write", 
+        "type": "STRING"
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+      {
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+        "name": "core_http2_send_trailing_metadata_per_write_bkts", 
+        "type": "STRING"
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+      {
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+        "name": "core_http2_send_trailing_metadata_per_write_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_trailing_metadata_per_write_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_trailing_metadata_per_write_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_flowctl_per_write", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_flowctl_per_write_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_flowctl_per_write_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_flowctl_per_write_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_flowctl_per_write_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_closures_per_wakeup", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_closures_per_wakeup_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_closures_per_wakeup_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_closures_per_wakeup_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_closures_per_wakeup_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_cqs_checked", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_cqs_checked_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_cqs_checked_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_cqs_checked_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_cqs_checked_99p", 
+        "type": "FLOAT"
       }
-    ]
-  },
+    ], 
+    "mode": "REPEATED", 
+    "name": "clientStats", 
+    "type": "RECORD"
+  }, 
   {
-    "name": "serverStats",
-    "type": "RECORD",
-    "mode": "REPEATED",
     "fields": [
       {
-        "name": "timeElapsed",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
+        "mode": "NULLABLE", 
+        "name": "timeElapsed", 
+        "type": "FLOAT"
+      }, 
       {
-        "name": "timeUser",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
+        "mode": "NULLABLE", 
+        "name": "timeUser", 
+        "type": "FLOAT"
+      }, 
       {
-        "name": "timeSystem",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
+        "mode": "NULLABLE", 
+        "name": "timeSystem", 
+        "type": "FLOAT"
+      }, 
       {
-        "name": "cqPollCount",
-        "type": "INTEGER",
-        "mode": "NULLABLE"
+        "mode": "NULLABLE", 
+        "name": "cqPollCount", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_client_calls_created", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_calls_created", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_cqs_created", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_client_channels_created", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_client_subchannels_created", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_channels_created", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_syscall_poll", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_syscall_wait", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_pollset_kick", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_pollset_kicked_without_poller", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_pollset_kicked_again", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_pollset_kick_wakeup_fd", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_pollset_kick_wakeup_cv", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_pollset_kick_own_thread", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_histogram_slow_lookups", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_syscall_write", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_syscall_read", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_backup_pollers_created", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_backup_poller_polls", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_op_batches", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_op_cancel", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_op_send_initial_metadata", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_op_send_message", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_op_send_trailing_metadata", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_op_recv_initial_metadata", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_op_recv_message", 
+        "type": "INTEGER"
+      }, 
+      {
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+        "name": "core_http2_op_recv_trailing_metadata", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_settings_writes", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_pings_sent", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_writes_begun", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_writes_offloaded", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_writes_continued", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_partial_writes", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_initial_write", 
+        "type": "INTEGER"
+      }, 
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+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_start_new_stream", 
+        "type": "INTEGER"
+      }, 
+      {
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+        "name": "core_http2_initiate_write_due_to_send_message", 
+        "type": "INTEGER"
+      }, 
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+        "name": "core_http2_initiate_write_due_to_send_initial_metadata", 
+        "type": "INTEGER"
+      }, 
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+        "type": "INTEGER"
+      }, 
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+        "type": "INTEGER"
+      }, 
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+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_continue_pings", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_goaway_sent", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_rst_stream", 
+        "type": "INTEGER"
+      }, 
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+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_close_from_api", 
+        "type": "INTEGER"
+      }, 
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+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_stream_flow_control", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_transport_flow_control", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_send_settings", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_bdp_estimator_ping", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_flow_control_unstalled_by_setting", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_flow_control_unstalled_by_update", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_application_ping", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_keepalive_ping", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_transport_flow_control_unstalled", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_ping_response", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_initiate_write_due_to_force_rst_stream", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_recv_indexed", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_recv_lithdr_incidx", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_recv_lithdr_incidx_v", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_recv_lithdr_notidx", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_recv_lithdr_notidx_v", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_recv_lithdr_nvridx", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_recv_lithdr_nvridx_v", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_recv_uncompressed", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_recv_huffman", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_recv_binary", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_recv_binary_base64", 
+        "type": "INTEGER"
+      }, 
+      {
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+        "name": "core_hpack_send_indexed", 
+        "type": "INTEGER"
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+      {
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+        "name": "core_hpack_send_lithdr_incidx", 
+        "type": "INTEGER"
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+        "name": "core_hpack_send_lithdr_incidx_v", 
+        "type": "INTEGER"
+      }, 
+      {
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+        "name": "core_hpack_send_lithdr_notidx", 
+        "type": "INTEGER"
+      }, 
+      {
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+        "name": "core_hpack_send_lithdr_notidx_v", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_send_lithdr_nvridx", 
+        "type": "INTEGER"
+      }, 
+      {
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+        "name": "core_hpack_send_lithdr_nvridx_v", 
+        "type": "INTEGER"
+      }, 
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+        "name": "core_hpack_send_uncompressed", 
+        "type": "INTEGER"
+      }, 
+      {
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+        "name": "core_hpack_send_huffman", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_send_binary", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_hpack_send_binary_base64", 
+        "type": "INTEGER"
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+        "name": "core_combiner_locks_initiated", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_combiner_locks_scheduled_items", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_combiner_locks_scheduled_final_items", 
+        "type": "INTEGER"
+      }, 
+      {
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+        "name": "core_combiner_locks_offloaded", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_scheduled_short_items", 
+        "type": "INTEGER"
+      }, 
+      {
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+        "name": "core_executor_scheduled_long_items", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_scheduled_to_self", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_wakeup_initiated", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_queue_drained", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_push_retries", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_threads_created", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_threads_used", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_requested_calls", 
+        "type": "INTEGER"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_slowpath_requests_queued", 
+        "type": "INTEGER"
+      }, 
+      {
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+        "name": "core_call_initial_size", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_call_initial_size_bkts", 
+        "type": "STRING"
+      }, 
+      {
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+        "name": "core_call_initial_size_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_call_initial_size_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_call_initial_size_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_poll_events_returned", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_poll_events_returned_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_poll_events_returned_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_poll_events_returned_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_poll_events_returned_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_size", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_size_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_size_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_size_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_size_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_iov_size", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_iov_size_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_iov_size_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_iov_size_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_write_iov_size_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_size", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_size_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_size_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_size_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_size_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_iov_size", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_iov_size_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_iov_size_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_iov_size_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_tcp_read_offer_iov_size_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_message_size", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_message_size_bkts", 
+        "type": "STRING"
+      }, 
+      {
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+        "name": "core_http2_send_message_size_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_message_size_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_message_size_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_initial_metadata_per_write", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_initial_metadata_per_write_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_initial_metadata_per_write_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_initial_metadata_per_write_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_initial_metadata_per_write_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_message_per_write", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_message_per_write_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_message_per_write_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_message_per_write_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_message_per_write_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_trailing_metadata_per_write", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_trailing_metadata_per_write_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_trailing_metadata_per_write_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_trailing_metadata_per_write_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_trailing_metadata_per_write_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_flowctl_per_write", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_flowctl_per_write_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_flowctl_per_write_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_flowctl_per_write_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_http2_send_flowctl_per_write_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_closures_per_wakeup", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_closures_per_wakeup_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_closures_per_wakeup_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_closures_per_wakeup_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_executor_closures_per_wakeup_99p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_cqs_checked", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_cqs_checked_bkts", 
+        "type": "STRING"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_cqs_checked_50p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_cqs_checked_95p", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "core_server_cqs_checked_99p", 
+        "type": "FLOAT"
       }
-    ]
-  },
+    ], 
+    "mode": "REPEATED", 
+    "name": "serverStats", 
+    "type": "RECORD"
+  }, 
   {
-    "name": "serverCores",
-    "type": "STRING",
-    "mode": "NULLABLE"
-  },
+    "mode": "NULLABLE", 
+    "name": "serverCores", 
+    "type": "STRING"
+  }, 
   {
-    "name": "summary",
-    "type": "RECORD",
-    "mode": "NULLABLE",
     "fields": [
       {
-        "name": "qps",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "qpsPerServerCore",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "serverSystemTime",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "serverUserTime",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "clientSystemTime",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "clientUserTime",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "latency50",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "latency90",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "latency95",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "latency99",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "latency999",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "clientPollsPerRequest",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "serverPollsPerRequest",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "serverQueriesPerCpuSec",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
-      },
-      {
-        "name": "clientQueriesPerCpuSec",
-        "type": "FLOAT",
-        "mode": "NULLABLE"
+        "mode": "NULLABLE", 
+        "name": "qps", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "qpsPerServerCore", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "serverSystemTime", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "serverUserTime", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "clientSystemTime", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "clientUserTime", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "latency50", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "latency90", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "latency95", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "latency99", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "latency999", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "clientPollsPerRequest", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "serverPollsPerRequest", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "serverQueriesPerCpuSec", 
+        "type": "FLOAT"
+      }, 
+      {
+        "mode": "NULLABLE", 
+        "name": "clientQueriesPerCpuSec", 
+        "type": "FLOAT"
       }
-    ]
-  },
+    ], 
+    "mode": "NULLABLE", 
+    "name": "summary", 
+    "type": "RECORD"
+  }, 
   {
-    "name": "clientSuccess",
-    "type": "STRING",
-    "mode": "NULLABLE"
-  },
+    "mode": "NULLABLE", 
+    "name": "clientSuccess", 
+    "type": "STRING"
+  }, 
   {
-    "name": "serverSuccess",
-    "type": "STRING",
-    "mode": "NULLABLE"
-  },
+    "mode": "NULLABLE", 
+    "name": "serverSuccess", 
+    "type": "STRING"
+  }, 
   {
-    "name": "requestResults",
-    "type": "STRING",
-    "mode": "NULLABLE"
-  },
+    "mode": "NULLABLE", 
+    "name": "requestResults", 
+    "type": "STRING"
+  }, 
   {
-    "name": "serverCpuStats",
-    "type": "RECORD",
-    "mode": "REPEATED",
     "fields": [
       {
-        "name": "totalCpuTime",
-        "type": "INTEGER",
-        "mode": "NULLABLE"
-      },
+        "mode": "NULLABLE", 
+        "name": "totalCpuTime", 
+        "type": "INTEGER"
+      }, 
       {
-        "name": "idleCpuTime",
-        "type": "INTEGER",
-        "mode": "NULLABLE"
+        "mode": "NULLABLE", 
+        "name": "idleCpuTime", 
+        "type": "INTEGER"
       }
-    ]
-  },
+    ], 
+    "mode": "REPEATED", 
+    "name": "serverCpuStats", 
+    "type": "RECORD"
+  }, 
   {
-    "name": "serverCpuUsage",
-    "type": "FLOAT",
-    "mode": "NULLABLE"
+    "mode": "NULLABLE", 
+    "name": "serverCpuUsage", 
+    "type": "FLOAT"
   }
-]
+]
\ No newline at end of file
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 032c0701e2..f99143fdd7 100644
--- a/tools/run_tests/python_utils/filter_pull_request_tests.py
+++ b/tools/run_tests/python_utils/filter_pull_request_tests.py
@@ -86,7 +86,6 @@ _WHITELIST_DICT = {
   '^test/distrib/php/': [_PHP_TEST_SUITE],
   '^test/distrib/python/': [_PYTHON_TEST_SUITE],
   '^test/distrib/ruby/': [_RUBY_TEST_SUITE],
-  '^tools/internal_ci/': [],
   '^vsprojects/': [_WINDOWS_TEST_SUITE],
   'binding\.gyp$': [_NODE_TEST_SUITE],
   'composer\.json$': [_PHP_TEST_SUITE],
@@ -128,7 +127,7 @@ def _get_changed_files(base_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"]).splitlines()
+  return check_output(["git", "diff", base_commit, "--name-only", "HEAD"]).splitlines()
 
 
 def _can_skip_tests(file_names, triggers):
diff --git a/tools/run_tests/python_utils/jobset.py b/tools/run_tests/python_utils/jobset.py
index 08d652ae3f..062c79a0de 100755
--- a/tools/run_tests/python_utils/jobset.py
+++ b/tools/run_tests/python_utils/jobset.py
@@ -71,10 +71,8 @@ def platform_string():
 if platform_string() == 'windows':
   pass
 else:
-  have_alarm = False
   def alarm_handler(unused_signum, unused_frame):
-    global have_alarm
-    have_alarm = False
+    pass
 
   signal.signal(signal.SIGCHLD, lambda unused_signum, unused_frame: None)
   signal.signal(signal.SIGALRM, alarm_handler)
@@ -224,7 +222,7 @@ class JobResult(object):
     self.retries = 0
     self.message = ''
     self.cpu_estimated = 1
-    self.cpu_measured = 0
+    self.cpu_measured = 1
 
 
 def read_from_start(f):
@@ -367,10 +365,9 @@ class Jobset(object):
   """Manages one run of jobs."""
 
   def __init__(self, check_cancelled, maxjobs, newline_on_success, travis,
-               stop_on_failure, add_env, quiet_success, max_time, clear_alarms):
+               stop_on_failure, add_env, quiet_success, max_time):
     self._running = set()
     self._check_cancelled = check_cancelled
-    self._clear_alarms = clear_alarms
     self._cancelled = False
     self._failures = 0
     self._completed = 0
@@ -455,10 +452,7 @@ class Jobset(object):
       if platform_string() == 'windows':
         time.sleep(0.1)
       else:
-        global have_alarm
-        if not have_alarm:
-          have_alarm = True
-          signal.alarm(10)
+        signal.alarm(10)
         signal.pause()
 
   def cancelled(self):
@@ -474,10 +468,7 @@ class Jobset(object):
     while self._running:
       if self.cancelled(): pass  # poll cancellation
       self.reap()
-    # Clear the alarms when finished to avoid a race condition causing job
-    # failures. Don't do this when running multi-VM tests because clearing
-    # the alarms causes the test to stall
-    if platform_string() != 'windows' and self._clear_alarms:
+    if platform_string() != 'windows':
       signal.alarm(0)
     return not self.cancelled() and self._failures == 0
 
@@ -507,8 +498,7 @@ def run(cmdlines,
         add_env={},
         skip_jobs=False,
         quiet_success=False,
-        max_time=-1,
-        clear_alarms=True):
+        max_time=-1):
   if skip_jobs:
     resultset = {}
     skipped_job_result = JobResult()
@@ -520,7 +510,7 @@ def run(cmdlines,
   js = Jobset(check_cancelled,
               maxjobs if maxjobs is not None else _DEFAULT_MAX_JOBS,
               newline_on_success, travis, stop_on_failure, add_env,
-              quiet_success, max_time, clear_alarms)
+              quiet_success, max_time)
   for cmdline, remaining in tag_remaining(cmdlines):
     if not js.start(cmdline):
       break
diff --git a/tools/run_tests/run_performance_tests.py b/tools/run_tests/run_performance_tests.py
index 9b20fae78f..1bbab9e894 100755
--- a/tools/run_tests/run_performance_tests.py
+++ b/tools/run_tests/run_performance_tests.py
@@ -183,7 +183,7 @@ def archive_repo(languages):
 
   jobset.message('START', 'Archiving local repository.', do_newline=True)
   num_failures, _ = jobset.run(
-      [archive_job], newline_on_success=True, maxjobs=1, clear_alarms=False)
+      [archive_job], newline_on_success=True, maxjobs=1)
   if num_failures == 0:
     jobset.message('SUCCESS',
                    'Archive with local repository created successfully.',
@@ -215,7 +215,7 @@ def prepare_remote_hosts(hosts, prepare_local=False):
             timeout_seconds=prepare_timeout))
   jobset.message('START', 'Preparing hosts.', do_newline=True)
   num_failures, _ = jobset.run(
-      prepare_jobs, newline_on_success=True, maxjobs=10, clear_alarms=False)
+      prepare_jobs, newline_on_success=True, maxjobs=10)
   if num_failures == 0:
     jobset.message('SUCCESS',
                    'Prepare step completed successfully.',
@@ -248,7 +248,7 @@ def build_on_remote_hosts(hosts, languages=scenario_config.LANGUAGES.keys(), bui
             timeout_seconds=build_timeout))
   jobset.message('START', 'Building.', do_newline=True)
   num_failures, _ = jobset.run(
-      build_jobs, newline_on_success=True, maxjobs=10, clear_alarms=False)
+      build_jobs, newline_on_success=True, maxjobs=10)
   if num_failures == 0:
     jobset.message('SUCCESS',
                    'Built successfully.',
@@ -414,7 +414,7 @@ def run_collect_perf_profile_jobs(hosts_and_base_names, scenario_name, flame_gra
     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, clear_alarms=False)
+  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
 
@@ -556,7 +556,7 @@ def main():
         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, clear_alarms=False)
+        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)))
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index b66c5f7f71..b38108d456 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -80,7 +80,7 @@ def get_bqtest_data(limit=None):
 SELECT
   filtered_test_name,
   SUM(result != 'PASSED' AND result != 'SKIPPED') > 0 as flaky,
-  MAX(cpu_measured) as cpu
+  MAX(cpu_measured) + 0.01 as cpu
   FROM (
   SELECT
     REGEXP_REPLACE(test_name, r'/\d+', '') AS filtered_test_name,
@@ -92,9 +92,7 @@ SELECT
     AND platform = '"""+platform_string()+"""'
     AND NOT REGEXP_MATCH(job_name, '.*portability.*') )
 GROUP BY
-  filtered_test_name
-HAVING
-  flaky OR cpu > 0"""
+  filtered_test_name"""
   if limit:
     query += " limit {}".format(limit)
   query_job = big_query_utils.sync_query_job(bq, 'grpc-testing', query)
@@ -352,11 +350,12 @@ class CLanguage(object):
                                                 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=' '.join(
-                                                          pipes.quote(arg)
-                                                          for arg in cmdline) +
-                                                      shortname_ext,
+                                            shortname=shortname,
                                             cpu_cost=cpu_cost,
                                             flaky=target.get('flaky', False),
                                             timeout_seconds=target.get('timeout_seconds', _DEFAULT_TIMEOUT_SECONDS) * timeout_scaling,
@@ -535,6 +534,7 @@ class PhpLanguage(object):
     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'],
@@ -547,7 +547,7 @@ class PhpLanguage(object):
     return ['static_c', 'shared_c']
 
   def make_options(self):
-    return []
+    return self._make_options;
 
   def build_steps(self):
     return [['tools/run_tests/helper_scripts/build_php.sh']]
@@ -571,6 +571,7 @@ class Php7Language(object):
     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'],
@@ -583,7 +584,7 @@ class Php7Language(object):
     return ['static_c', 'shared_c']
 
   def make_options(self):
-    return []
+    return self._make_options;
 
   def build_steps(self):
     return [['tools/run_tests/helper_scripts/build_php.sh']]
diff --git a/tools/run_tests/run_tests_matrix.py b/tools/run_tests/run_tests_matrix.py
index 00680b02d3..2417c5ae55 100755
--- a/tools/run_tests/run_tests_matrix.py
+++ b/tools/run_tests/run_tests_matrix.py
@@ -29,9 +29,14 @@ 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
+
 # Set the timeout high to allow enough time for sanitizers and pre-building
 # clang docker.
-_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
 
 # Number of jobs assigned to each run_tests.py instance
 _DEFAULT_INNER_JOBS = 2
@@ -51,8 +56,11 @@ def _report_filename_internal_ci(name):
 
 
 def _docker_jobspec(name, runtests_args=[], runtests_envs={},
-                    inner_jobs=_DEFAULT_INNER_JOBS):
+                    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',
@@ -62,15 +70,18 @@ def _docker_jobspec(name, runtests_args=[], runtests_envs={},
                    '--report_suite_name', '%s' % name] + runtests_args,
           environ=runtests_envs,
           shortname='run_tests_%s' % name,
-          timeout_seconds=_RUNTESTS_TIMEOUT)
+          timeout_seconds=timeout_seconds)
   return test_job
 
 
 def _workspace_jobspec(name, runtests_args=[], workspace_name=None,
-                       runtests_envs={}, inner_jobs=_DEFAULT_INNER_JOBS):
+                       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(
@@ -82,14 +93,15 @@ def _workspace_jobspec(name, runtests_args=[], workspace_name=None,
                    '--report_suite_name', '%s' % name] + runtests_args,
           environ=env,
           shortname='run_tests_%s' % name,
-          timeout_seconds=_RUNTESTS_TIMEOUT)
+          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):
+                  inner_jobs=_DEFAULT_INNER_JOBS,
+                  timeout_seconds=None):
   result = []
   for language in languages:
     for platform in platforms:
@@ -110,10 +122,12 @@ def _generate_jobs(languages, configs, platforms, iomgr_platform = 'native',
         runtests_args += extra_args
         if platform == 'linux':
           job = _docker_jobspec(name=name, runtests_args=runtests_args,
-                                runtests_envs=extra_envs, inner_jobs=inner_jobs)
+                                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)
+                                   runtests_envs=extra_envs, inner_jobs=inner_jobs,
+                                   timeout_seconds=timeout_seconds)
 
         job.labels = [platform, config, language, iomgr_platform] + labels
         result.append(job)
@@ -136,7 +150,8 @@ def _create_test_jobs(extra_args=[], inner_jobs=_DEFAULT_INNER_JOBS):
                              platforms=['linux', 'macos', 'windows'],
                              labels=['basictests', 'corelang'],
                              extra_args=extra_args,
-                             inner_jobs=inner_jobs)
+                             inner_jobs=inner_jobs,
+                             timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
   
   test_jobs += _generate_jobs(languages=['csharp', 'node', 'python'],
                              configs=['dbg', 'opt'],
@@ -151,7 +166,8 @@ def _create_test_jobs(extra_args=[], inner_jobs=_DEFAULT_INNER_JOBS):
                               platforms=['linux', 'macos'],
                               labels=['basictests', 'corelang'],
                               extra_args=extra_args,
-                              inner_jobs=inner_jobs)
+                              inner_jobs=inner_jobs,
+                              timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
   
   test_jobs += _generate_jobs(languages=['ruby', 'php'],
                               configs=['dbg', 'opt'],
@@ -174,13 +190,22 @@ def _create_test_jobs(extra_args=[], inner_jobs=_DEFAULT_INNER_JOBS):
                               platforms=['linux'],
                               labels=['sanitizers', 'corelang'],
                               extra_args=extra_args,
-                              inner_jobs=inner_jobs)
+                              inner_jobs=inner_jobs,
+                              timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
   test_jobs += _generate_jobs(languages=['c++'],
-                              configs=['asan', 'tsan'],
+                              configs=['asan'],
                               platforms=['linux'],
                               labels=['sanitizers', 'corelang'],
                               extra_args=extra_args,
-                              inner_jobs=inner_jobs)
+                              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
 
@@ -207,7 +232,8 @@ def _create_portability_test_jobs(extra_args=[], inner_jobs=_DEFAULT_INNER_JOBS)
                                 compiler=compiler,
                                 labels=['portability', 'corelang'],
                                 extra_args=extra_args,
-                                inner_jobs=inner_jobs)
+                                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'],
@@ -246,10 +272,11 @@ def _create_portability_test_jobs(extra_args=[], inner_jobs=_DEFAULT_INNER_JOBS)
                               configs=['dbg'], platforms=['linux'],
                               labels=['portability', 'corelang'],
                               extra_args=extra_args,
-                              extra_envs={'GRPC_DNS_RESOLVER': 'ares'})
+                              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 Windonws
+  # C with the c-ares DNS resolver on Windows
   # test_jobs += _generate_jobs(languages=['c'],
   #                             configs=['dbg'], platforms=['windows'],
   #                             labels=['portability', 'corelang'],
@@ -292,7 +319,8 @@ def _create_portability_test_jobs(extra_args=[], inner_jobs=_DEFAULT_INNER_JOBS)
                               iomgr_platform='uv',
                               labels=['portability', 'corelang'],
                               extra_args=extra_args,
-                              inner_jobs=inner_jobs)
+                              inner_jobs=inner_jobs,
+                              timeout_seconds=_CPP_RUNTESTS_TIMEOUT)
 
   test_jobs += _generate_jobs(languages=['node'],
                               configs=['dbg'],