Merge branch 'master' into surface_test_bazel

38 files changed, 682 insertions, 1396 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index aa097075be..3c2a609f84 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -420,9 +420,6 @@ if(_gRPC_PLATFORM_LINUX)
 add_dependencies(buildtests_c httpscli_test)
 endif()
 add_dependencies(buildtests_c init_test)
-add_dependencies(buildtests_c internal_api_canary_iomgr_test)
-add_dependencies(buildtests_c internal_api_canary_support_test)
-add_dependencies(buildtests_c internal_api_canary_transport_test)
 add_dependencies(buildtests_c invalid_call_argument_test)
 add_dependencies(buildtests_c json_rewrite)
 add_dependencies(buildtests_c json_rewrite_test)
@@ -573,6 +570,9 @@ if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
 add_dependencies(buildtests_cxx bm_closure)
 endif()
 if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
+add_dependencies(buildtests_cxx bm_cq)
+endif()
+if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
 add_dependencies(buildtests_cxx bm_fullstack)
 endif()
 add_dependencies(buildtests_cxx channel_arguments_test)
@@ -5941,87 +5941,6 @@ target_link_libraries(init_test
 endif (gRPC_BUILD_TESTS)
 if (gRPC_BUILD_TESTS)
 
-add_executable(internal_api_canary_iomgr_test
-  test/core/internal_api_canaries/iomgr.c
-)
-
-
-target_include_directories(internal_api_canary_iomgr_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 ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
-)
-
-target_link_libraries(internal_api_canary_iomgr_test
-  ${_gRPC_ALLTARGETS_LIBRARIES}
-  grpc_test_util
-  grpc
-  gpr_test_util
-  gpr
-)
-
-endif (gRPC_BUILD_TESTS)
-if (gRPC_BUILD_TESTS)
-
-add_executable(internal_api_canary_support_test
-  test/core/internal_api_canaries/iomgr.c
-)
-
-
-target_include_directories(internal_api_canary_support_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 ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
-)
-
-target_link_libraries(internal_api_canary_support_test
-  ${_gRPC_ALLTARGETS_LIBRARIES}
-  grpc_test_util
-  grpc
-  gpr_test_util
-  gpr
-)
-
-endif (gRPC_BUILD_TESTS)
-if (gRPC_BUILD_TESTS)
-
-add_executable(internal_api_canary_transport_test
-  test/core/internal_api_canaries/iomgr.c
-)
-
-
-target_include_directories(internal_api_canary_transport_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 ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
-)
-
-target_link_libraries(internal_api_canary_transport_test
-  ${_gRPC_ALLTARGETS_LIBRARIES}
-  grpc_test_util
-  grpc
-  gpr_test_util
-  gpr
-)
-
-endif (gRPC_BUILD_TESTS)
-if (gRPC_BUILD_TESTS)
-
 add_executable(invalid_call_argument_test
   test/core/end2end/invalid_call_argument_test.c
 )
@@ -7477,6 +7396,44 @@ endif (gRPC_BUILD_TESTS)
 if (gRPC_BUILD_TESTS)
 if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
 
+add_executable(bm_cq
+  test/cpp/microbenchmarks/bm_cq.cc
+  third_party/googletest/src/gtest-all.cc
+)
+
+
+target_include_directories(bm_cq
+  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 ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
+  PRIVATE third_party/googletest/include
+  PRIVATE third_party/googletest
+  PRIVATE ${_gRPC_PROTO_GENS_DIR}
+)
+
+target_link_libraries(bm_cq
+  ${_gRPC_PROTOBUF_LIBRARIES}
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+  benchmark
+  grpc++_test_util
+  grpc_test_util
+  grpc++
+  grpc
+  gpr_test_util
+  gpr
+  ${_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(bm_fullstack
   test/cpp/microbenchmarks/bm_fullstack.cc
   third_party/googletest/src/gtest-all.cc
diff --git a/Makefile b/Makefile
index 8f92816672..0571e1dec1 100644
--- a/Makefile
+++ b/Makefile
@@ -217,7 +217,7 @@ CC_counters = $(DEFAULT_CC)
 CXX_counters = $(DEFAULT_CXX)
 LD_counters = $(DEFAULT_CC)
 LDXX_counters = $(DEFAULT_CXX)
-CPPFLAGS_counters = -O2 -DGPR_MU_COUNTERS
+CPPFLAGS_counters = -O2 -DGPR_LOW_LEVEL_COUNTERS
 DEFINES_counters = NDEBUG
 
 
@@ -980,9 +980,6 @@ httpcli_format_request_test: $(BINDIR)/$(CONFIG)/httpcli_format_request_test
 httpcli_test: $(BINDIR)/$(CONFIG)/httpcli_test
 httpscli_test: $(BINDIR)/$(CONFIG)/httpscli_test
 init_test: $(BINDIR)/$(CONFIG)/init_test
-internal_api_canary_iomgr_test: $(BINDIR)/$(CONFIG)/internal_api_canary_iomgr_test
-internal_api_canary_support_test: $(BINDIR)/$(CONFIG)/internal_api_canary_support_test
-internal_api_canary_transport_test: $(BINDIR)/$(CONFIG)/internal_api_canary_transport_test
 invalid_call_argument_test: $(BINDIR)/$(CONFIG)/invalid_call_argument_test
 json_fuzzer_test: $(BINDIR)/$(CONFIG)/json_fuzzer_test
 json_rewrite: $(BINDIR)/$(CONFIG)/json_rewrite
@@ -1044,6 +1041,7 @@ alarm_cpp_test: $(BINDIR)/$(CONFIG)/alarm_cpp_test
 async_end2end_test: $(BINDIR)/$(CONFIG)/async_end2end_test
 auth_property_iterator_test: $(BINDIR)/$(CONFIG)/auth_property_iterator_test
 bm_closure: $(BINDIR)/$(CONFIG)/bm_closure
+bm_cq: $(BINDIR)/$(CONFIG)/bm_cq
 bm_fullstack: $(BINDIR)/$(CONFIG)/bm_fullstack
 channel_arguments_test: $(BINDIR)/$(CONFIG)/channel_arguments_test
 channel_filter_test: $(BINDIR)/$(CONFIG)/channel_filter_test
@@ -1336,9 +1334,6 @@ buildtests_c: privatelibs_c \
   $(BINDIR)/$(CONFIG)/httpcli_test \
   $(BINDIR)/$(CONFIG)/httpscli_test \
   $(BINDIR)/$(CONFIG)/init_test \
-  $(BINDIR)/$(CONFIG)/internal_api_canary_iomgr_test \
-  $(BINDIR)/$(CONFIG)/internal_api_canary_support_test \
-  $(BINDIR)/$(CONFIG)/internal_api_canary_transport_test \
   $(BINDIR)/$(CONFIG)/invalid_call_argument_test \
   $(BINDIR)/$(CONFIG)/json_rewrite \
   $(BINDIR)/$(CONFIG)/json_rewrite_test \
@@ -1452,6 +1447,7 @@ buildtests_cxx: privatelibs_cxx \
   $(BINDIR)/$(CONFIG)/async_end2end_test \
   $(BINDIR)/$(CONFIG)/auth_property_iterator_test \
   $(BINDIR)/$(CONFIG)/bm_closure \
+  $(BINDIR)/$(CONFIG)/bm_cq \
   $(BINDIR)/$(CONFIG)/bm_fullstack \
   $(BINDIR)/$(CONFIG)/channel_arguments_test \
   $(BINDIR)/$(CONFIG)/channel_filter_test \
@@ -1558,6 +1554,7 @@ buildtests_cxx: privatelibs_cxx \
   $(BINDIR)/$(CONFIG)/async_end2end_test \
   $(BINDIR)/$(CONFIG)/auth_property_iterator_test \
   $(BINDIR)/$(CONFIG)/bm_closure \
+  $(BINDIR)/$(CONFIG)/bm_cq \
   $(BINDIR)/$(CONFIG)/bm_fullstack \
   $(BINDIR)/$(CONFIG)/channel_arguments_test \
   $(BINDIR)/$(CONFIG)/channel_filter_test \
@@ -1876,6 +1873,8 @@ test_cxx: buildtests_cxx
 	$(Q) $(BINDIR)/$(CONFIG)/auth_property_iterator_test || ( echo test auth_property_iterator_test failed ; exit 1 )
 	$(E) "[RUN]     Testing bm_closure"
 	$(Q) $(BINDIR)/$(CONFIG)/bm_closure || ( echo test bm_closure failed ; exit 1 )
+	$(E) "[RUN]     Testing bm_cq"
+	$(Q) $(BINDIR)/$(CONFIG)/bm_cq || ( echo test bm_cq failed ; exit 1 )
 	$(E) "[RUN]     Testing bm_fullstack"
 	$(Q) $(BINDIR)/$(CONFIG)/bm_fullstack || ( echo test bm_fullstack failed ; exit 1 )
 	$(E) "[RUN]     Testing channel_arguments_test"
@@ -10340,102 +10339,6 @@ endif
 endif
 
 
-INTERNAL_API_CANARY_IOMGR_TEST_SRC = \
-    test/core/internal_api_canaries/iomgr.c \
-
-INTERNAL_API_CANARY_IOMGR_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(INTERNAL_API_CANARY_IOMGR_TEST_SRC))))
-ifeq ($(NO_SECURE),true)
-
-# You can't build secure targets if you don't have OpenSSL.
-
-$(BINDIR)/$(CONFIG)/internal_api_canary_iomgr_test: openssl_dep_error
-
-else
-
-
-
-$(BINDIR)/$(CONFIG)/internal_api_canary_iomgr_test: $(INTERNAL_API_CANARY_IOMGR_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(INTERNAL_API_CANARY_IOMGR_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/internal_api_canary_iomgr_test
-
-endif
-
-$(OBJDIR)/$(CONFIG)/test/core/internal_api_canaries/iomgr.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-
-deps_internal_api_canary_iomgr_test: $(INTERNAL_API_CANARY_IOMGR_TEST_OBJS:.o=.dep)
-
-ifneq ($(NO_SECURE),true)
-ifneq ($(NO_DEPS),true)
--include $(INTERNAL_API_CANARY_IOMGR_TEST_OBJS:.o=.dep)
-endif
-endif
-
-
-INTERNAL_API_CANARY_SUPPORT_TEST_SRC = \
-    test/core/internal_api_canaries/iomgr.c \
-
-INTERNAL_API_CANARY_SUPPORT_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(INTERNAL_API_CANARY_SUPPORT_TEST_SRC))))
-ifeq ($(NO_SECURE),true)
-
-# You can't build secure targets if you don't have OpenSSL.
-
-$(BINDIR)/$(CONFIG)/internal_api_canary_support_test: openssl_dep_error
-
-else
-
-
-
-$(BINDIR)/$(CONFIG)/internal_api_canary_support_test: $(INTERNAL_API_CANARY_SUPPORT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(INTERNAL_API_CANARY_SUPPORT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/internal_api_canary_support_test
-
-endif
-
-$(OBJDIR)/$(CONFIG)/test/core/internal_api_canaries/iomgr.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-
-deps_internal_api_canary_support_test: $(INTERNAL_API_CANARY_SUPPORT_TEST_OBJS:.o=.dep)
-
-ifneq ($(NO_SECURE),true)
-ifneq ($(NO_DEPS),true)
--include $(INTERNAL_API_CANARY_SUPPORT_TEST_OBJS:.o=.dep)
-endif
-endif
-
-
-INTERNAL_API_CANARY_TRANSPORT_TEST_SRC = \
-    test/core/internal_api_canaries/iomgr.c \
-
-INTERNAL_API_CANARY_TRANSPORT_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(INTERNAL_API_CANARY_TRANSPORT_TEST_SRC))))
-ifeq ($(NO_SECURE),true)
-
-# You can't build secure targets if you don't have OpenSSL.
-
-$(BINDIR)/$(CONFIG)/internal_api_canary_transport_test: openssl_dep_error
-
-else
-
-
-
-$(BINDIR)/$(CONFIG)/internal_api_canary_transport_test: $(INTERNAL_API_CANARY_TRANSPORT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(INTERNAL_API_CANARY_TRANSPORT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/internal_api_canary_transport_test
-
-endif
-
-$(OBJDIR)/$(CONFIG)/test/core/internal_api_canaries/iomgr.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-
-deps_internal_api_canary_transport_test: $(INTERNAL_API_CANARY_TRANSPORT_TEST_OBJS:.o=.dep)
-
-ifneq ($(NO_SECURE),true)
-ifneq ($(NO_DEPS),true)
--include $(INTERNAL_API_CANARY_TRANSPORT_TEST_OBJS:.o=.dep)
-endif
-endif
-
-
 INVALID_CALL_ARGUMENT_TEST_SRC = \
     test/core/end2end/invalid_call_argument_test.c \
 
@@ -12432,6 +12335,49 @@ endif
 endif
 
 
+BM_CQ_SRC = \
+    test/cpp/microbenchmarks/bm_cq.cc \
+
+BM_CQ_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(BM_CQ_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/bm_cq: 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)/$(CONFIG)/bm_cq: protobuf_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/bm_cq: $(PROTOBUF_DEP) $(BM_CQ_OBJS) $(LIBDIR)/$(CONFIG)/libbenchmark.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LDXX) $(LDFLAGS) $(BM_CQ_OBJS) $(LIBDIR)/$(CONFIG)/libbenchmark.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) $(GTEST_LIB) -o $(BINDIR)/$(CONFIG)/bm_cq
+
+endif
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/cpp/microbenchmarks/bm_cq.o:  $(LIBDIR)/$(CONFIG)/libbenchmark.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_bm_cq: $(BM_CQ_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(BM_CQ_OBJS:.o=.dep)
+endif
+endif
+
+
 BM_FULLSTACK_SRC = \
     test/cpp/microbenchmarks/bm_fullstack.cc \
 
diff --git a/WORKSPACE b/WORKSPACE
index 4f90f06d88..9b79d04cde 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -33,26 +33,36 @@ bind(
     actual = "@submodule_gtest//:gtest",
 )
 
+bind(
+    name = "gflags",
+    actual = "@com_github_gflags_gflags//:gflags",
+)
+
 new_local_repository(
     name = "submodule_boringssl",
-    path = "third_party/boringssl-with-bazel",
     build_file = "third_party/boringssl-with-bazel/BUILD",
+    path = "third_party/boringssl-with-bazel",
 )
 
 new_local_repository(
     name = "submodule_zlib",
-    path = "third_party/zlib",
     build_file = "third_party/zlib.BUILD",
+    path = "third_party/zlib",
 )
 
 new_local_repository(
     name = "submodule_protobuf",
-    path = "third_party/protobuf",
     build_file = "third_party/protobuf/BUILD",
+    path = "third_party/protobuf",
 )
 
 new_local_repository(
     name = "submodule_gtest",
-    path = "third_party/googletest",
     build_file = "third_party/gtest.BUILD",
+    path = "third_party/googletest",
+)
+
+local_repository(
+    name = "com_github_gflags_gflags",
+    path = "third_party/gflags",
 )
diff --git a/build.yaml b/build.yaml
index 141526cb59..17a47e7f2f 100644
--- a/build.yaml
+++ b/build.yaml
@@ -2249,39 +2249,6 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
-- name: internal_api_canary_iomgr_test
-  build: test
-  run: false
-  language: c
-  src:
-  - test/core/internal_api_canaries/iomgr.c
-  deps:
-  - grpc_test_util
-  - grpc
-  - gpr_test_util
-  - gpr
-- name: internal_api_canary_support_test
-  build: test
-  run: false
-  language: c
-  src:
-  - test/core/internal_api_canaries/iomgr.c
-  deps:
-  - grpc_test_util
-  - grpc
-  - gpr_test_util
-  - gpr
-- name: internal_api_canary_transport_test
-  build: test
-  run: false
-  language: c
-  src:
-  - test/core/internal_api_canaries/iomgr.c
-  deps:
-  - grpc_test_util
-  - grpc
-  - gpr_test_util
-  - gpr
 - name: invalid_call_argument_test
   cpu_cost: 0.1
   build: test
@@ -3011,6 +2978,25 @@ targets:
   - mac
   - linux
   - posix
+- name: bm_cq
+  build: test
+  language: c++
+  src:
+  - test/cpp/microbenchmarks/bm_cq.cc
+  deps:
+  - benchmark
+  - grpc++_test_util
+  - grpc_test_util
+  - grpc++
+  - grpc
+  - gpr_test_util
+  - gpr
+  args:
+  - --benchmark_min_time=0
+  platforms:
+  - mac
+  - linux
+  - posix
 - name: bm_fullstack
   build: test
   language: c++
@@ -3919,7 +3905,7 @@ configs:
     CPPFLAGS: -O2 -DGRPC_BASIC_PROFILER -DGRPC_TIMERS_RDTSC
     DEFINES: NDEBUG
   counters:
-    CPPFLAGS: -O2 -DGPR_MU_COUNTERS
+    CPPFLAGS: -O2 -DGPR_LOW_LEVEL_COUNTERS
     DEFINES: NDEBUG
   dbg:
     CPPFLAGS: -O0
diff --git a/include/grpc/impl/codegen/atm_gcc_atomic.h b/include/grpc/impl/codegen/atm_gcc_atomic.h
index 7d4ae98cf7..4bd3b25741 100644
--- a/include/grpc/impl/codegen/atm_gcc_atomic.h
+++ b/include/grpc/impl/codegen/atm_gcc_atomic.h
@@ -40,6 +40,20 @@
 
 typedef intptr_t gpr_atm;
 
+#ifdef GPR_LOW_LEVEL_COUNTERS
+extern gpr_atm gpr_counter_atm_cas;
+extern gpr_atm gpr_counter_atm_add;
+#define GPR_ATM_INC_COUNTER(counter) \
+  __atomic_fetch_add(&counter, 1, __ATOMIC_RELAXED)
+#define GPR_ATM_INC_CAS_THEN(blah) \
+  (GPR_ATM_INC_COUNTER(gpr_counter_atm_cas), blah)
+#define GPR_ATM_INC_ADD_THEN(blah) \
+  (GPR_ATM_INC_COUNTER(gpr_counter_atm_add), blah)
+#else
+#define GPR_ATM_INC_CAS_THEN(blah) blah
+#define GPR_ATM_INC_ADD_THEN(blah) blah
+#endif
+
 #define gpr_atm_full_barrier() (__atomic_thread_fence(__ATOMIC_SEQ_CST))
 
 #define gpr_atm_acq_load(p) (__atomic_load_n((p), __ATOMIC_ACQUIRE))
@@ -50,25 +64,28 @@ typedef intptr_t gpr_atm;
   (__atomic_store_n((p), (intptr_t)(value), __ATOMIC_RELAXED))
 
 #define gpr_atm_no_barrier_fetch_add(p, delta) \
-  (__atomic_fetch_add((p), (intptr_t)(delta), __ATOMIC_RELAXED))
+  GPR_ATM_INC_ADD_THEN(                        \
+      __atomic_fetch_add((p), (intptr_t)(delta), __ATOMIC_RELAXED))
 #define gpr_atm_full_fetch_add(p, delta) \
-  (__atomic_fetch_add((p), (intptr_t)(delta), __ATOMIC_ACQ_REL))
+  GPR_ATM_INC_ADD_THEN(                  \
+      __atomic_fetch_add((p), (intptr_t)(delta), __ATOMIC_ACQ_REL))
 
 static __inline int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
-  return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_RELAXED,
-                                     __ATOMIC_RELAXED);
+  return GPR_ATM_INC_CAS_THEN(__atomic_compare_exchange_n(
+      p, &o, n, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED));
 }
 
 static __inline int gpr_atm_acq_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
-  return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_ACQUIRE,
-                                     __ATOMIC_RELAXED);
+  return GPR_ATM_INC_CAS_THEN(__atomic_compare_exchange_n(
+      p, &o, n, 0, __ATOMIC_ACQUIRE, __ATOMIC_RELAXED));
 }
 
 static __inline int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
-  return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_RELEASE,
-                                     __ATOMIC_RELAXED);
+  return GPR_ATM_INC_CAS_THEN(__atomic_compare_exchange_n(
+      p, &o, n, 0, __ATOMIC_RELEASE, __ATOMIC_RELAXED));
 }
 
-#define gpr_atm_full_xchg(p, n) __atomic_exchange_n((p), (n), __ATOMIC_ACQ_REL)
+#define gpr_atm_full_xchg(p, n) \
+  GPR_ATM_INC_CAS_THEN(__atomic_exchange_n((p), (n), __ATOMIC_ACQ_REL))
 
 #endif /* GRPC_IMPL_CODEGEN_ATM_GCC_ATOMIC_H */
diff --git a/src/core/ext/transport/chttp2/server/chttp2_server.c b/src/core/ext/transport/chttp2/server/chttp2_server.c
index ae2c3838ed..0fc180d52f 100644
--- a/src/core/ext/transport/chttp2/server/chttp2_server.c
+++ b/src/core/ext/transport/chttp2/server/chttp2_server.c
@@ -55,11 +55,6 @@
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/server.h"
 
-typedef struct pending_handshake_manager_node {
-  grpc_handshake_manager *handshake_mgr;
-  struct pending_handshake_manager_node *next;
-} pending_handshake_manager_node;
-
 typedef struct {
   grpc_server *server;
   grpc_tcp_server *tcp_server;
@@ -68,7 +63,7 @@ typedef struct {
   bool shutdown;
   grpc_closure tcp_server_shutdown_complete;
   grpc_closure *server_destroy_listener_done;
-  pending_handshake_manager_node *pending_handshake_mgrs;
+  grpc_handshake_manager *pending_handshake_mgrs;
 } server_state;
 
 typedef struct {
@@ -78,44 +73,6 @@ typedef struct {
   grpc_handshake_manager *handshake_mgr;
 } server_connection_state;
 
-static void pending_handshake_manager_add_locked(
-    server_state *state, grpc_handshake_manager *handshake_mgr) {
-  pending_handshake_manager_node *node = gpr_malloc(sizeof(*node));
-  node->handshake_mgr = handshake_mgr;
-  node->next = state->pending_handshake_mgrs;
-  state->pending_handshake_mgrs = node;
-}
-
-static void pending_handshake_manager_remove_locked(
-    server_state *state, grpc_handshake_manager *handshake_mgr) {
-  pending_handshake_manager_node **prev_node = &state->pending_handshake_mgrs;
-  for (pending_handshake_manager_node *node = state->pending_handshake_mgrs;
-       node != NULL; node = node->next) {
-    if (node->handshake_mgr == handshake_mgr) {
-      *prev_node = node->next;
-      gpr_free(node);
-      break;
-    }
-    prev_node = &node->next;
-  }
-}
-
-static void pending_handshake_manager_shutdown_locked(grpc_exec_ctx *exec_ctx,
-                                                      server_state *state,
-                                                      grpc_error *why) {
-  pending_handshake_manager_node *prev_node = NULL;
-  for (pending_handshake_manager_node *node = state->pending_handshake_mgrs;
-       node != NULL; node = node->next) {
-    grpc_handshake_manager_shutdown(exec_ctx, node->handshake_mgr,
-                                    GRPC_ERROR_REF(why));
-    gpr_free(prev_node);
-    prev_node = node;
-  }
-  gpr_free(prev_node);
-  state->pending_handshake_mgrs = NULL;
-  GRPC_ERROR_UNREF(why);
-}
-
 static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
                               grpc_error *error) {
   grpc_handshaker_args *args = arg;
@@ -153,8 +110,9 @@ static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
       grpc_channel_args_destroy(exec_ctx, args->args);
     }
   }
-  pending_handshake_manager_remove_locked(connection_state->server_state,
-                                          connection_state->handshake_mgr);
+  grpc_handshake_manager_pending_list_remove(
+      &connection_state->server_state->pending_handshake_mgrs,
+      connection_state->handshake_mgr);
   gpr_mu_unlock(&connection_state->server_state->mu);
   grpc_handshake_manager_destroy(exec_ctx, connection_state->handshake_mgr);
   grpc_tcp_server_unref(exec_ctx, connection_state->server_state->tcp_server);
@@ -174,7 +132,8 @@ static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *tcp,
     return;
   }
   grpc_handshake_manager *handshake_mgr = grpc_handshake_manager_create();
-  pending_handshake_manager_add_locked(state, handshake_mgr);
+  grpc_handshake_manager_pending_list_add(&state->pending_handshake_mgrs,
+                                          handshake_mgr);
   gpr_mu_unlock(&state->mu);
   grpc_tcp_server_ref(state->tcp_server);
   server_connection_state *connection_state =
@@ -213,8 +172,8 @@ static void tcp_server_shutdown_complete(grpc_exec_ctx *exec_ctx, void *arg,
   gpr_mu_lock(&state->mu);
   grpc_closure *destroy_done = state->server_destroy_listener_done;
   GPR_ASSERT(state->shutdown);
-  pending_handshake_manager_shutdown_locked(exec_ctx, state,
-                                            GRPC_ERROR_REF(error));
+  grpc_handshake_manager_pending_list_shutdown_all(
+      exec_ctx, state->pending_handshake_mgrs, GRPC_ERROR_REF(error));
   gpr_mu_unlock(&state->mu);
   // Flush queued work before destroying handshaker factory, since that
   // may do a synchronous unref.
diff --git a/src/core/lib/channel/handshaker.c b/src/core/lib/channel/handshaker.c
index 5bed2d041d..82c361c7ef 100644
--- a/src/core/lib/channel/handshaker.c
+++ b/src/core/lib/channel/handshaker.c
@@ -92,6 +92,10 @@ struct grpc_handshake_manager {
   void* user_data;
   // Handshaker args.
   grpc_handshaker_args args;
+  // Links to the previous and next managers in a list of all pending handshakes
+  // Used at server side only.
+  grpc_handshake_manager* prev;
+  grpc_handshake_manager* next;
 };
 
 grpc_handshake_manager* grpc_handshake_manager_create() {
@@ -102,6 +106,39 @@ grpc_handshake_manager* grpc_handshake_manager_create() {
   return mgr;
 }
 
+void grpc_handshake_manager_pending_list_add(grpc_handshake_manager** head,
+                                             grpc_handshake_manager* mgr) {
+  GPR_ASSERT(mgr->prev == NULL);
+  GPR_ASSERT(mgr->next == NULL);
+  mgr->next = *head;
+  if (*head) {
+    (*head)->prev = mgr;
+  }
+  *head = mgr;
+}
+
+void grpc_handshake_manager_pending_list_remove(grpc_handshake_manager** head,
+                                                grpc_handshake_manager* mgr) {
+  if (mgr->next != NULL) {
+    mgr->next->prev = mgr->prev;
+  }
+  if (mgr->prev != NULL) {
+    mgr->prev->next = mgr->next;
+  } else {
+    GPR_ASSERT(*head == mgr);
+    *head = mgr->next;
+  }
+}
+
+void grpc_handshake_manager_pending_list_shutdown_all(
+    grpc_exec_ctx* exec_ctx, grpc_handshake_manager* head, grpc_error* why) {
+  while (head != NULL) {
+    grpc_handshake_manager_shutdown(exec_ctx, head, GRPC_ERROR_REF(why));
+    head = head->next;
+  }
+  GRPC_ERROR_UNREF(why);
+}
+
 static bool is_power_of_2(size_t n) { return (n & (n - 1)) == 0; }
 
 void grpc_handshake_manager_add(grpc_handshake_manager* mgr,
diff --git a/src/core/lib/channel/handshaker.h b/src/core/lib/channel/handshaker.h
index a8e3692add..5f97c3fc73 100644
--- a/src/core/lib/channel/handshaker.h
+++ b/src/core/lib/channel/handshaker.h
@@ -163,4 +163,20 @@ void grpc_handshake_manager_do_handshake(
     gpr_timespec deadline, grpc_tcp_server_acceptor* acceptor,
     grpc_iomgr_cb_func on_handshake_done, void* user_data);
 
+/// Add \a mgr to the server side list of all pending handshake managers, the
+/// list starts with \a *head.
+// Not thread-safe. Caller needs to synchronize.
+void grpc_handshake_manager_pending_list_add(grpc_handshake_manager** head,
+                                             grpc_handshake_manager* mgr);
+
+/// Remove \a mgr from the server side list of all pending handshake managers.
+// Not thread-safe. Caller needs to synchronize.
+void grpc_handshake_manager_pending_list_remove(grpc_handshake_manager** head,
+                                                grpc_handshake_manager* mgr);
+
+/// Shutdown all pending handshake managers on the server side.
+// Not thread-safe. Caller needs to synchronize.
+void grpc_handshake_manager_pending_list_shutdown_all(
+    grpc_exec_ctx* exec_ctx, grpc_handshake_manager* head, grpc_error* why);
+
 #endif /* GRPC_CORE_LIB_CHANNEL_HANDSHAKER_H */
diff --git a/src/core/lib/support/sync_posix.c b/src/core/lib/support/sync_posix.c
index de0f0484b5..16e7d6e12a 100644
--- a/src/core/lib/support/sync_posix.c
+++ b/src/core/lib/support/sync_posix.c
@@ -42,8 +42,10 @@
 #include <time.h>
 #include "src/core/lib/profiling/timers.h"
 
-#ifdef GPR_MU_COUNTERS
-gpr_atm grpc_mu_locks = 0;
+#ifdef GPR_LOW_LEVEL_COUNTERS
+gpr_atm gpr_mu_locks = 0;
+gpr_atm gpr_counter_atm_cas = 0;
+gpr_atm gpr_counter_atm_add = 0;
 #endif
 
 void gpr_mu_init(gpr_mu* mu) { GPR_ASSERT(pthread_mutex_init(mu, NULL) == 0); }
@@ -51,8 +53,8 @@ void gpr_mu_init(gpr_mu* mu) { GPR_ASSERT(pthread_mutex_init(mu, NULL) == 0); }
 void gpr_mu_destroy(gpr_mu* mu) { GPR_ASSERT(pthread_mutex_destroy(mu) == 0); }
 
 void gpr_mu_lock(gpr_mu* mu) {
-#ifdef GPR_MU_COUNTERS
-  gpr_atm_no_barrier_fetch_add(&grpc_mu_locks, 1);
+#ifdef GPR_LOW_LEVEL_COUNTERS
+  GPR_ATM_INC_COUNTER(gpr_mu_locks);
 #endif
   GPR_TIMER_BEGIN("gpr_mu_lock", 0);
   GPR_ASSERT(pthread_mutex_lock(mu) == 0);
diff --git a/src/objective-c/tests/CronetUnitTests/CronetUnitTests.m b/src/objective-c/tests/CronetUnitTests/CronetUnitTests.m
index 5e3c59f8b3..e97f3d2d1a 100644
--- a/src/objective-c/tests/CronetUnitTests/CronetUnitTests.m
+++ b/src/objective-c/tests/CronetUnitTests/CronetUnitTests.m
@@ -321,44 +321,8 @@ unsigned int parse_h2_length(const char *field) {
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
-  memset(ops, 0, sizeof(ops));
-  op = ops;
-  op->op = GRPC_OP_SEND_INITIAL_METADATA;
-  op->data.send_initial_metadata.count = 2;
-  op->data.send_initial_metadata.metadata = meta_c;
-  op->flags = 0;
-  op->reserved = NULL;
-  op++;
-  op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message.send_message = request_payload;
-  op->flags = 0;
-  op->reserved = NULL;
-  op++;
-  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
-  op->flags = 0;
-  op->reserved = NULL;
-  op++;
-  op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
-  op->flags = 0;
-  op->reserved = NULL;
-  op++;
-  op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message.recv_message = &response_payload_recv;
-  op->flags = 0;
-  op->reserved = NULL;
-  op++;
-  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
-  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
-  op->data.recv_status_on_client.status = &status;
-  op->data.recv_status_on_client.status_details = &details;
-  op->flags = 0;
-  op->reserved = NULL;
-  op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), (void *)1, NULL);
-  GPR_ASSERT(GRPC_CALL_OK == error);
-
-  __weak XCTestExpectation *expectation = [self expectationWithDescription:@"Coalescing"];
+  __weak XCTestExpectation *expectation =
+      [self expectationWithDescription:@"Coalescing"];
 
   dispatch_async(
       dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
@@ -425,6 +389,46 @@ unsigned int parse_h2_length(const char *field) {
         [expectation fulfill];
       });
 
+  // Guarantees that server is listening to the port before client connects.
+  sleep(1);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 2;
+  op->data.send_initial_metadata.metadata = meta_c;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  op->data.send_message.send_message = request_payload;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message.recv_message = &response_payload_recv;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
+  op->data.recv_status_on_client.status = &status;
+  op->data.recv_status_on_client.status_details = &details;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), (void *)1, NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
   CQ_EXPECT_COMPLETION(cqv, (void *)1, 1);
   cq_verify(cqv);
 
@@ -445,7 +449,7 @@ unsigned int parse_h2_length(const char *field) {
   grpc_completion_queue_shutdown(cq);
   drain_cq(cq);
   grpc_completion_queue_destroy(cq);
-  
+
   [self waitForExpectationsWithTimeout:4 handler:nil];
 }
 
diff --git a/src/ruby/lib/grpc/generic/client_stub.rb b/src/ruby/lib/grpc/generic/client_stub.rb
index 6934257cbc..d8de0beefb 100644
--- a/src/ruby/lib/grpc/generic/client_stub.rb
+++ b/src/ruby/lib/grpc/generic/client_stub.rb
@@ -84,7 +84,7 @@ module GRPC
     # channel:
     #
     # - :channel_override
-    # when present, this must be a pre-created GRPC::Channel.  If it's
+    # when present, this must be a pre-created GRPC::Core::Channel.  If it's
     # present the host and arbitrary keyword arg areignored, and the RPC
     # connection uses this channel.
     #
diff --git a/test/core/internal_api_canaries/iomgr.c b/test/core/internal_api_canaries/iomgr.c
deleted file mode 100644
index 6fdaf1f980..0000000000
--- a/test/core/internal_api_canaries/iomgr.c
+++ /dev/null
@@ -1,118 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include "src/core/lib/iomgr/iomgr.h"
-#include "src/core/lib/iomgr/closure.h"
-#include "src/core/lib/iomgr/endpoint.h"
-#include "src/core/lib/iomgr/exec_ctx.h"
-#include "src/core/lib/iomgr/executor.h"
-
-/*******************************************************************************
- * NOTE: If this test fails to compile, then the api changes are likely to cause
- *       merge failures downstream. Please pay special attention to reviewing
- *       these changes, and solicit help as appropriate when merging downstream.
- *
- * This test is NOT expected to be run directly.
- ******************************************************************************/
-
-static void test_code(void) {
-  /* iomgr.h */
-  grpc_iomgr_init();
-  grpc_iomgr_shutdown(NULL);
-
-  /* closure.h */
-  grpc_closure closure;
-  closure.cb = NULL;
-  closure.cb_arg = NULL;
-  closure.next_data.scratch = 0;
-
-  grpc_closure_list closure_list = GRPC_CLOSURE_LIST_INIT;
-  closure_list.head = NULL;
-  closure_list.tail = NULL;
-
-  grpc_closure_init(&closure, NULL, NULL, grpc_schedule_on_exec_ctx);
-
-  grpc_closure_create(NULL, NULL, grpc_schedule_on_exec_ctx);
-
-  grpc_closure_list_move(NULL, NULL);
-  grpc_closure_list_append(NULL, NULL, GRPC_ERROR_CREATE("Foo"));
-  grpc_closure_list_empty(closure_list);
-
-  /* exec_ctx.h */
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_exec_ctx_flush(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
-  grpc_closure_sched(&exec_ctx, &closure, GRPC_ERROR_CREATE("Foo"));
-  grpc_closure_list_sched(&exec_ctx, &closure_list);
-
-  /* endpoint.h */
-  grpc_endpoint endpoint;
-  grpc_endpoint_vtable vtable = {grpc_endpoint_read,
-                                 grpc_endpoint_write,
-                                 grpc_endpoint_get_workqueue,
-                                 grpc_endpoint_add_to_pollset,
-                                 grpc_endpoint_add_to_pollset_set,
-                                 grpc_endpoint_shutdown,
-                                 grpc_endpoint_destroy,
-                                 grpc_endpoint_get_resource_user,
-                                 grpc_endpoint_get_peer,
-                                 grpc_endpoint_get_fd};
-  endpoint.vtable = &vtable;
-
-  grpc_endpoint_read(&exec_ctx, &endpoint, NULL, NULL);
-  grpc_endpoint_get_peer(&endpoint);
-  grpc_endpoint_write(&exec_ctx, &endpoint, NULL, NULL);
-  grpc_endpoint_shutdown(&exec_ctx, &endpoint, GRPC_ERROR_CANCELLED);
-  grpc_endpoint_destroy(&exec_ctx, &endpoint);
-  grpc_endpoint_add_to_pollset(&exec_ctx, &endpoint, NULL);
-  grpc_endpoint_add_to_pollset_set(&exec_ctx, &endpoint, NULL);
-
-  /* executor.h */
-  grpc_executor_init();
-  grpc_executor_shutdown(NULL);
-
-  /* pollset.h */
-  grpc_pollset_size();
-  grpc_pollset_init(NULL, NULL);
-  grpc_pollset_shutdown(NULL, NULL, NULL);
-  grpc_pollset_destroy(NULL);
-  GRPC_ERROR_UNREF(grpc_pollset_work(NULL, NULL, NULL,
-                                     gpr_now(GPR_CLOCK_REALTIME),
-                                     gpr_now(GPR_CLOCK_MONOTONIC)));
-  GRPC_ERROR_UNREF(grpc_pollset_kick(NULL, NULL));
-}
-
-int main(void) {
-  if (false) test_code();
-  return 0;
-}
diff --git a/test/core/internal_api_canaries/support.c b/test/core/internal_api_canaries/support.c
deleted file mode 100644
index e992d2a66a..0000000000
--- a/test/core/internal_api_canaries/support.c
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-/*******************************************************************************
- * NOTE: If this test fails to compile, then the api changes are likely to cause
- *       merge failures downstream. Please pay special attention to reviewing
- *       these changes, and solicit help as appropriate when merging downstream.
- *
- * This test is NOT expected to be run directly.
- ******************************************************************************/
-
-#include "src/core/lib/iomgr/load_file.h"
-#include "src/core/lib/support/env.h"
-#include "src/core/lib/support/tmpfile.h"
-
-static void test_code(void) {
-  /* env.h */
-  gpr_set_env("abc", gpr_getenv("xyz"));
-  /* load_file.h */
-  grpc_load_file("abc", 1, NULL);
-  /* tmpfile.h */
-  fclose(gpr_tmpfile("foo", NULL));
-}
-
-int main(void) {
-  if (false) test_code();
-  return 0;
-}
diff --git a/test/core/internal_api_canaries/transport.c b/test/core/internal_api_canaries/transport.c
deleted file mode 100644
index 2989f59535..0000000000
--- a/test/core/internal_api_canaries/transport.c
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-/*******************************************************************************
- * NOTE: If this test fails to compile, then the api changes are likely to cause
- *       merge failures downstream. Please pay special attention to reviewing
- *       these changes, and solicit help as appropriate when merging downstream.
- *
- * This test is NOT expected to be run directly.
- ******************************************************************************/
-
-#include "src/core/lib/transport/transport.h"
-#include "src/core/lib/transport/transport_impl.h"
-
-static void test_code(void) {
-  /* transport_impl.h */
-  grpc_transport transport;
-  grpc_transport_vtable vtable = {12345,
-                                  grpc_transport_init_stream,
-                                  grpc_transport_set_pollset,
-                                  grpc_transport_perform_stream_op,
-                                  grpc_transport_perform_op,
-                                  grpc_transport_destroy_stream,
-                                  grpc_transport_destroy,
-                                  grpc_transport_get_peer};
-  transport.vtable = &vtable;
-
-  /* transport.h */
-  GRPC_STREAM_REF_INIT(NULL, 0, NULL, NULL, "xyz");
-  GPR_ASSERT(0 == grpc_transport_stream_size(NULL));
-  GPR_ASSERT(grpc_transport_init_stream(&transport, NULL, NULL, NULL, NULL));
-  grpc_transport_set_pollset(&transport, NULL, NULL, NULL);
-  grpc_transport_destroy_stream(&transport, NULL, NULL);
-  grpc_transport_stream_op_finish_with_failure(NULL, NULL);
-  grpc_transport_stream_op_add_cancellation(NULL, GRPC_STATUS_UNAVAILABLE);
-  grpc_transport_stream_op_add_close(NULL, GRPC_STATUS_UNAVAILABLE,
-                                     grpc_transport_op_string(NULL));
-  grpc_transport_perform_stream_op(&transport, NULL, NULL, NULL);
-  grpc_transport_perform_op(&transport, NULL, NULL);
-  grpc_transport_ping(&transport, NULL);
-  grpc_transport_goaway(&transport, GRPC_STATUS_UNAVAILABLE,
-                        grpc_slice_malloc(0));
-  grpc_transport_close(&transport);
-  grpc_transport_destroy(&transport, NULL);
-  GPR_ASSERT("xyz" == grpc_transport_get_peer(&transport, NULL));
-}
-
-int main(void) {
-  if (false) test_code();
-  return 0;
-}
diff --git a/test/cpp/microbenchmarks/bm_closure.cc b/test/cpp/microbenchmarks/bm_closure.cc
index 80d6610e13..03aede35b2 100644
--- a/test/cpp/microbenchmarks/bm_closure.cc
+++ b/test/cpp/microbenchmarks/bm_closure.cc
@@ -43,13 +43,53 @@ extern "C" {
 
 #include "third_party/benchmark/include/benchmark/benchmark.h"
 
+#include <sstream>
+
+#ifdef GPR_LOW_LEVEL_COUNTERS
+extern "C" gpr_atm gpr_mu_locks;
+#endif
+
 static class InitializeStuff {
  public:
   InitializeStuff() { grpc_init(); }
   ~InitializeStuff() { grpc_shutdown(); }
 } initialize_stuff;
 
+class TrackCounters {
+ public:
+  TrackCounters(benchmark::State& state) : state_(state) {}
+
+  ~TrackCounters() {
+    std::ostringstream out;
+#ifdef GPR_LOW_LEVEL_COUNTERS
+    out << " locks/iter:" << ((double)(gpr_atm_no_barrier_load(&gpr_mu_locks) -
+                                       mu_locks_at_start_) /
+                              (double)state_.iterations())
+        << " atm_cas/iter:"
+        << ((double)(gpr_atm_no_barrier_load(&gpr_counter_atm_cas) -
+                     atm_cas_at_start_) /
+            (double)state_.iterations())
+        << " atm_add/iter:"
+        << ((double)(gpr_atm_no_barrier_load(&gpr_counter_atm_add) -
+                     atm_add_at_start_) /
+            (double)state_.iterations());
+#endif
+    state_.SetLabel(out.str());
+  }
+
+ private:
+  benchmark::State& state_;
+#ifdef GPR_LOW_LEVEL_COUNTERS
+  const size_t mu_locks_at_start_ = gpr_atm_no_barrier_load(&gpr_mu_locks);
+  const size_t atm_cas_at_start_ =
+      gpr_atm_no_barrier_load(&gpr_counter_atm_cas);
+  const size_t atm_add_at_start_ =
+      gpr_atm_no_barrier_load(&gpr_counter_atm_add);
+#endif
+};
+
 static void BM_NoOpExecCtx(benchmark::State& state) {
+  TrackCounters track_counters(state);
   while (state.KeepRunning()) {
     grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
     grpc_exec_ctx_finish(&exec_ctx);
@@ -58,6 +98,7 @@ static void BM_NoOpExecCtx(benchmark::State& state) {
 BENCHMARK(BM_NoOpExecCtx);
 
 static void BM_WellFlushed(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   while (state.KeepRunning()) {
     grpc_exec_ctx_flush(&exec_ctx);
@@ -69,6 +110,7 @@ BENCHMARK(BM_WellFlushed);
 static void DoNothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
 
 static void BM_ClosureInitAgainstExecCtx(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_closure c;
   while (state.KeepRunning()) {
     benchmark::DoNotOptimize(
@@ -78,6 +120,7 @@ static void BM_ClosureInitAgainstExecCtx(benchmark::State& state) {
 BENCHMARK(BM_ClosureInitAgainstExecCtx);
 
 static void BM_ClosureInitAgainstCombiner(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_combiner* combiner = grpc_combiner_create(NULL);
   grpc_closure c;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
@@ -91,6 +134,7 @@ static void BM_ClosureInitAgainstCombiner(benchmark::State& state) {
 BENCHMARK(BM_ClosureInitAgainstCombiner);
 
 static void BM_ClosureRunOnExecCtx(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_closure c;
   grpc_closure_init(&c, DoNothing, NULL, grpc_schedule_on_exec_ctx);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
@@ -103,6 +147,7 @@ static void BM_ClosureRunOnExecCtx(benchmark::State& state) {
 BENCHMARK(BM_ClosureRunOnExecCtx);
 
 static void BM_ClosureCreateAndRun(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   while (state.KeepRunning()) {
     grpc_closure_run(&exec_ctx, grpc_closure_create(DoNothing, NULL,
@@ -114,6 +159,7 @@ static void BM_ClosureCreateAndRun(benchmark::State& state) {
 BENCHMARK(BM_ClosureCreateAndRun);
 
 static void BM_ClosureInitAndRun(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_closure c;
   while (state.KeepRunning()) {
@@ -126,6 +172,7 @@ static void BM_ClosureInitAndRun(benchmark::State& state) {
 BENCHMARK(BM_ClosureInitAndRun);
 
 static void BM_ClosureSchedOnExecCtx(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_closure c;
   grpc_closure_init(&c, DoNothing, NULL, grpc_schedule_on_exec_ctx);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
@@ -138,6 +185,7 @@ static void BM_ClosureSchedOnExecCtx(benchmark::State& state) {
 BENCHMARK(BM_ClosureSchedOnExecCtx);
 
 static void BM_ClosureSched2OnExecCtx(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_closure c1;
   grpc_closure c2;
   grpc_closure_init(&c1, DoNothing, NULL, grpc_schedule_on_exec_ctx);
@@ -153,6 +201,7 @@ static void BM_ClosureSched2OnExecCtx(benchmark::State& state) {
 BENCHMARK(BM_ClosureSched2OnExecCtx);
 
 static void BM_ClosureSched3OnExecCtx(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_closure c1;
   grpc_closure c2;
   grpc_closure c3;
@@ -171,6 +220,7 @@ static void BM_ClosureSched3OnExecCtx(benchmark::State& state) {
 BENCHMARK(BM_ClosureSched3OnExecCtx);
 
 static void BM_AcquireMutex(benchmark::State& state) {
+  TrackCounters track_counters(state);
   // for comparison with the combiner stuff below
   gpr_mu mu;
   gpr_mu_init(&mu);
@@ -185,6 +235,7 @@ static void BM_AcquireMutex(benchmark::State& state) {
 BENCHMARK(BM_AcquireMutex);
 
 static void BM_ClosureSchedOnCombiner(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_combiner* combiner = grpc_combiner_create(NULL);
   grpc_closure c;
   grpc_closure_init(&c, DoNothing, NULL,
@@ -200,6 +251,7 @@ static void BM_ClosureSchedOnCombiner(benchmark::State& state) {
 BENCHMARK(BM_ClosureSchedOnCombiner);
 
 static void BM_ClosureSched2OnCombiner(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_combiner* combiner = grpc_combiner_create(NULL);
   grpc_closure c1;
   grpc_closure c2;
@@ -219,6 +271,7 @@ static void BM_ClosureSched2OnCombiner(benchmark::State& state) {
 BENCHMARK(BM_ClosureSched2OnCombiner);
 
 static void BM_ClosureSched3OnCombiner(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_combiner* combiner = grpc_combiner_create(NULL);
   grpc_closure c1;
   grpc_closure c2;
@@ -242,6 +295,7 @@ static void BM_ClosureSched3OnCombiner(benchmark::State& state) {
 BENCHMARK(BM_ClosureSched3OnCombiner);
 
 static void BM_ClosureSched2OnTwoCombiners(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_combiner* combiner1 = grpc_combiner_create(NULL);
   grpc_combiner* combiner2 = grpc_combiner_create(NULL);
   grpc_closure c1;
@@ -263,6 +317,7 @@ static void BM_ClosureSched2OnTwoCombiners(benchmark::State& state) {
 BENCHMARK(BM_ClosureSched2OnTwoCombiners);
 
 static void BM_ClosureSched4OnTwoCombiners(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_combiner* combiner1 = grpc_combiner_create(NULL);
   grpc_combiner* combiner2 = grpc_combiner_create(NULL);
   grpc_closure c1;
@@ -323,6 +378,7 @@ class Rescheduler {
 };
 
 static void BM_ClosureReschedOnExecCtx(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   Rescheduler r(state, grpc_schedule_on_exec_ctx);
   r.ScheduleFirst(&exec_ctx);
@@ -331,6 +387,7 @@ static void BM_ClosureReschedOnExecCtx(benchmark::State& state) {
 BENCHMARK(BM_ClosureReschedOnExecCtx);
 
 static void BM_ClosureReschedOnCombiner(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_combiner* combiner = grpc_combiner_create(NULL);
   Rescheduler r(state, grpc_combiner_scheduler(combiner, false));
@@ -342,6 +399,7 @@ static void BM_ClosureReschedOnCombiner(benchmark::State& state) {
 BENCHMARK(BM_ClosureReschedOnCombiner);
 
 static void BM_ClosureReschedOnCombinerFinally(benchmark::State& state) {
+  TrackCounters track_counters(state);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_combiner* combiner = grpc_combiner_create(NULL);
   Rescheduler r(state, grpc_combiner_finally_scheduler(combiner, false));
diff --git a/test/cpp/microbenchmarks/bm_cq.cc b/test/cpp/microbenchmarks/bm_cq.cc
new file mode 100644
index 0000000000..195dcef3ab
--- /dev/null
+++ b/test/cpp/microbenchmarks/bm_cq.cc
@@ -0,0 +1,119 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/* This benchmark exists to ensure that the benchmark integration is
+ * working */
+
+#include <grpc++/completion_queue.h>
+#include <grpc++/impl/grpc_library.h>
+#include <grpc/grpc.h>
+
+#include "third_party/benchmark/include/benchmark/benchmark.h"
+
+extern "C" {
+#include "src/core/lib/surface/completion_queue.h"
+}
+
+namespace grpc {
+namespace testing {
+
+static class InitializeStuff {
+ public:
+  InitializeStuff() { init_lib_.init(); }
+  ~InitializeStuff() { init_lib_.shutdown(); }
+
+ private:
+  internal::GrpcLibrary init_lib_;
+  internal::GrpcLibraryInitializer init_;
+} initialize_stuff;
+
+static void BM_CreateDestroyCpp(benchmark::State& state) {
+  while (state.KeepRunning()) {
+    CompletionQueue cq;
+  }
+}
+BENCHMARK(BM_CreateDestroyCpp);
+
+static void BM_CreateDestroyCore(benchmark::State& state) {
+  while (state.KeepRunning()) {
+    grpc_completion_queue_destroy(grpc_completion_queue_create(NULL));
+  }
+}
+BENCHMARK(BM_CreateDestroyCore);
+
+static void DoneWithCompletionOnStack(grpc_exec_ctx* exec_ctx, void* arg,
+                                      grpc_cq_completion* completion) {}
+
+class DummyTag final : public CompletionQueueTag {
+ public:
+  bool FinalizeResult(void** tag, bool* status) override { return true; }
+};
+
+static void BM_Pass1Cpp(benchmark::State& state) {
+  CompletionQueue cq;
+  grpc_completion_queue* c_cq = cq.cq();
+  while (state.KeepRunning()) {
+    grpc_cq_completion completion;
+    DummyTag dummy_tag;
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_cq_begin_op(c_cq, &dummy_tag);
+    grpc_cq_end_op(&exec_ctx, c_cq, &dummy_tag, GRPC_ERROR_NONE,
+                   DoneWithCompletionOnStack, NULL, &completion);
+    grpc_exec_ctx_finish(&exec_ctx);
+    void* tag;
+    bool ok;
+    cq.Next(&tag, &ok);
+  }
+}
+BENCHMARK(BM_Pass1Cpp);
+
+static void BM_Pass1Core(benchmark::State& state) {
+  grpc_completion_queue* cq = grpc_completion_queue_create(NULL);
+  gpr_timespec deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
+  while (state.KeepRunning()) {
+    grpc_cq_completion completion;
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_cq_begin_op(cq, NULL);
+    grpc_cq_end_op(&exec_ctx, cq, NULL, GRPC_ERROR_NONE,
+                   DoneWithCompletionOnStack, NULL, &completion);
+    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_completion_queue_next(cq, deadline, NULL);
+  }
+  grpc_completion_queue_destroy(cq);
+}
+BENCHMARK(BM_Pass1Core);
+
+}  // namespace testing
+}  // namespace grpc
+
+BENCHMARK_MAIN();
diff --git a/test/cpp/microbenchmarks/bm_fullstack.cc b/test/cpp/microbenchmarks/bm_fullstack.cc
index c63de0ce0a..48e131f1be 100644
--- a/test/cpp/microbenchmarks/bm_fullstack.cc
+++ b/test/cpp/microbenchmarks/bm_fullstack.cc
@@ -99,8 +99,10 @@ static void ApplyCommonChannelArguments(ChannelArguments* c) {
   c->SetInt(GRPC_ARG_MAX_SEND_MESSAGE_LENGTH, INT_MAX);
 }
 
-#ifdef GPR_MU_COUNTERS
-extern "C" gpr_atm grpc_mu_locks;
+#ifdef GPR_LOW_LEVEL_COUNTERS
+extern "C" gpr_atm gpr_mu_locks;
+extern "C" gpr_atm gpr_counter_atm_cas;
+extern "C" gpr_atm gpr_counter_atm_add;
 #endif
 
 class BaseFixture {
@@ -108,10 +110,18 @@ class BaseFixture {
   void Finish(benchmark::State& s) {
     std::ostringstream out;
     this->AddToLabel(out, s);
-#ifdef GPR_MU_COUNTERS
-    out << " locks/iter:" << ((double)(gpr_atm_no_barrier_load(&grpc_mu_locks) -
+#ifdef GPR_LOW_LEVEL_COUNTERS
+    out << " locks/iter:" << ((double)(gpr_atm_no_barrier_load(&gpr_mu_locks) -
                                        mu_locks_at_start_) /
-                              (double)s.iterations());
+                              (double)s.iterations())
+        << " atm_cas/iter:"
+        << ((double)(gpr_atm_no_barrier_load(&gpr_counter_atm_cas) -
+                     atm_cas_at_start_) /
+            (double)s.iterations())
+        << " atm_add/iter:"
+        << ((double)(gpr_atm_no_barrier_load(&gpr_counter_atm_add) -
+                     atm_add_at_start_) /
+            (double)s.iterations());
 #endif
     grpc_memory_counters counters_at_end = grpc_memory_counters_snapshot();
     out << " allocs/iter:"
@@ -128,8 +138,12 @@ class BaseFixture {
   virtual void AddToLabel(std::ostream& out, benchmark::State& s) = 0;
 
  private:
-#ifdef GPR_MU_COUNTERS
-  const size_t mu_locks_at_start_ = gpr_atm_no_barrier_load(&grpc_mu_locks);
+#ifdef GPR_LOW_LEVEL_COUNTERS
+  const size_t mu_locks_at_start_ = gpr_atm_no_barrier_load(&gpr_mu_locks);
+  const size_t atm_cas_at_start_ =
+      gpr_atm_no_barrier_load(&gpr_counter_atm_cas);
+  const size_t atm_add_at_start_ =
+      gpr_atm_no_barrier_load(&gpr_counter_atm_add);
 #endif
   grpc_memory_counters counters_at_start_ = grpc_memory_counters_snapshot();
 };
diff --git a/test/cpp/util/BUILD b/test/cpp/util/BUILD
index 78eca8c3bd..f3cdc58986 100644
--- a/test/cpp/util/BUILD
+++ b/test/cpp/util/BUILD
@@ -37,14 +37,17 @@ cc_library(
     hdrs = [
         "test_config.h",
     ],
-    deps = ["//:gpr"],
     visibility = ["//test:__subpackages__"],
+    deps = [
+        "//:gpr",
+        "//external:gflags",
+    ],
 )
 
 cc_library(
     name = "test_util",
     srcs = [
-#        "test/cpp/end2end/test_service_impl.cc",
+        #        "test/cpp/end2end/test_service_impl.cc",
         "byte_buffer_proto_helper.cc",
         "create_test_channel.cc",
         "string_ref_helper.cc",
@@ -58,6 +61,10 @@ cc_library(
         "subprocess.h",
         "test_credentials_provider.h",
     ],
-    deps = ["//test/core/util:gpr_test_util", "//:grpc++", "//test/core/end2end:ssl_test_data"],
     visibility = ["//test:__subpackages__"],
+    deps = [
+        "//:grpc++",
+        "//test/core/end2end:ssl_test_data",
+        "//test/core/util:gpr_test_util",
+    ],
 )
diff --git a/third_party/gflags b/third_party/gflags
-Subproject f8a0efe03aa69b3336d8e228b37d4ccb17324b8
+Subproject 30dbc81fb5ffdc98ea9b14b1918bfe4e8779b26
diff --git a/tools/internal_ci/linux/grpc_interop.cfg b/tools/internal_ci/linux/grpc_interop_badserver_java.cfg
index 9259faf34d..e521b085c5 100644
--- a/tools/internal_ci/linux/grpc_interop.cfg
+++ b/tools/internal_ci/linux/grpc_interop_badserver_java.cfg
@@ -1,4 +1,3 @@
-#!/bin/bash
 # Copyright 2017, Google Inc.
 # All rights reserved.
 #
@@ -31,11 +30,11 @@
 # 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_interop.sh"
+build_file: "grpc/tools/internal_ci/linux/grpc_interop_badserver_java.sh"
 # grpc_interop tests can take 6+ hours to complete.
 timeout_mins: 480
 action {
   define_artifacts {
-    regex: "**/sponge_log.xml"
+    regex: "**/report.xml"
   }
 }
diff --git a/tools/internal_ci/linux/grpc_interop.sh b/tools/internal_ci/linux/grpc_interop_badserver_java.sh
index 68bb4199e3..0985e657c6 100755
--- a/tools/internal_ci/linux/grpc_interop.sh
+++ b/tools/internal_ci/linux/grpc_interop_badserver_java.sh
@@ -37,6 +37,5 @@ cd $(dirname $0)/../../..
 
 git submodule update --init
 
-tools/run_tests/run_interop_tests.py -l all -s all --cloud_to_prod --cloud_to_prod_auth --use_docker --http2_interop -t -j 12 $@ || FAILED="true"
-tools/run_tests/run_interop_tests.py -l java --use_docker --http2_badserver_interop $@ || FAILED="true"
-tools/run_tests/run_interop_tests.py -l python --use_docker --http2_badserver_interop $@ || FAILED="true"
+tools/run_tests/run_interop_tests.py -l java --use_docker --http2_badserver_interop $@
+
diff --git a/tools/internal_ci/linux/grpc_interop_badserver_python.cfg b/tools/internal_ci/linux/grpc_interop_badserver_python.cfg
new file mode 100644
index 0000000000..940f760e97
--- /dev/null
+++ b/tools/internal_ci/linux/grpc_interop_badserver_python.cfg
@@ -0,0 +1,40 @@
+# Copyright 2017, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# 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_interop_badserver_python.sh"
+# grpc_interop tests can take 6+ hours to complete.
+timeout_mins: 480
+action {
+  define_artifacts {
+    regex: "**/report.xml"
+  }
+}
diff --git a/tools/internal_ci/linux/grpc_interop_badserver_python.sh b/tools/internal_ci/linux/grpc_interop_badserver_python.sh
new file mode 100755
index 0000000000..3fff537d2b
--- /dev/null
+++ b/tools/internal_ci/linux/grpc_interop_badserver_python.sh
@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+# Copyright 2017, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set -ex
+
+export LANG=en_US.UTF-8
+
+# Enter the gRPC repo root
+cd $(dirname $0)/../../..
+
+git submodule update --init
+
+tools/run_tests/run_interop_tests.py -l python --use_docker --http2_badserver_interop $@
+
diff --git a/tools/internal_ci/linux/grpc_interop_tocloud.cfg b/tools/internal_ci/linux/grpc_interop_tocloud.cfg
new file mode 100644
index 0000000000..2b536446c1
--- /dev/null
+++ b/tools/internal_ci/linux/grpc_interop_tocloud.cfg
@@ -0,0 +1,40 @@
+# Copyright 2017, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# 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_interop_tocloud.sh"
+# grpc_interop tests can take 6+ hours to complete.
+timeout_mins: 480
+action {
+  define_artifacts {
+    regex: "**/report.xml"
+  }
+}
diff --git a/tools/internal_ci/linux/grpc_interop_tocloud.sh b/tools/internal_ci/linux/grpc_interop_tocloud.sh
new file mode 100755
index 0000000000..572001d944
--- /dev/null
+++ b/tools/internal_ci/linux/grpc_interop_tocloud.sh
@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+# Copyright 2017, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set -ex
+
+export LANG=en_US.UTF-8
+
+# Enter the gRPC repo root
+cd $(dirname $0)/../../..
+
+git submodule update --init
+
+tools/run_tests/run_interop_tests.py -l all -s all --use_docker --http2_interop -t -j 12 $@
diff --git a/tools/internal_ci/linux/grpc_master.cfg b/tools/internal_ci/linux/grpc_master.cfg
index 8ce2ef11a2..d5901bb601 100644
--- a/tools/internal_ci/linux/grpc_master.cfg
+++ b/tools/internal_ci/linux/grpc_master.cfg
@@ -32,7 +32,7 @@
 
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/linux/grpc_master.sh"
-timeout_mins: 60
+timeout_mins: 240
 action {
   define_artifacts {
     regex: "**/sponge_log.xml"
diff --git a/tools/profiling/microbenchmarks/bm2bq.py b/tools/profiling/microbenchmarks/bm2bq.py
index a7d82269f5..8770fb71cf 100755
--- a/tools/profiling/microbenchmarks/bm2bq.py
+++ b/tools/profiling/microbenchmarks/bm2bq.py
@@ -66,6 +66,8 @@ columns = [
   ('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')
 ]
 
 if sys.argv[1] == '--schema':
@@ -158,7 +160,7 @@ def parse_name(name):
 for bm in js['benchmarks']:
   context = js['context']
   if 'label' in bm:
-    labels_list = [s.split(':') for s in bm['label'].split(' ')]
+    labels_list = [s.split(':') for s in bm['label'].strip().split(' ')]
     for el in labels_list:
       el[0] = el[0].replace('/iter', '_per_iteration')
     labels = dict(labels_list)
diff --git a/tools/run_tests/generated/sources_and_headers.json b/tools/run_tests/generated/sources_and_headers.json
index 98b85cf417..ce1868df80 100644
--- a/tools/run_tests/generated/sources_and_headers.json
+++ b/tools/run_tests/generated/sources_and_headers.json
@@ -1299,57 +1299,6 @@
     "headers": [], 
     "is_filegroup": false, 
     "language": "c", 
-    "name": "internal_api_canary_iomgr_test", 
-    "src": [
-      "test/core/internal_api_canaries/iomgr.c"
-    ], 
-    "third_party": false, 
-    "type": "target"
-  }, 
-  {
-    "deps": [
-      "gpr", 
-      "gpr_test_util", 
-      "grpc", 
-      "grpc_test_util"
-    ], 
-    "headers": [], 
-    "is_filegroup": false, 
-    "language": "c", 
-    "name": "internal_api_canary_support_test", 
-    "src": [
-      "test/core/internal_api_canaries/iomgr.c"
-    ], 
-    "third_party": false, 
-    "type": "target"
-  }, 
-  {
-    "deps": [
-      "gpr", 
-      "gpr_test_util", 
-      "grpc", 
-      "grpc_test_util"
-    ], 
-    "headers": [], 
-    "is_filegroup": false, 
-    "language": "c", 
-    "name": "internal_api_canary_transport_test", 
-    "src": [
-      "test/core/internal_api_canaries/iomgr.c"
-    ], 
-    "third_party": false, 
-    "type": "target"
-  }, 
-  {
-    "deps": [
-      "gpr", 
-      "gpr_test_util", 
-      "grpc", 
-      "grpc_test_util"
-    ], 
-    "headers": [], 
-    "is_filegroup": false, 
-    "language": "c", 
     "name": "invalid_call_argument_test", 
     "src": [
       "test/core/end2end/invalid_call_argument_test.c"
@@ -2394,6 +2343,26 @@
     "headers": [], 
     "is_filegroup": false, 
     "language": "c++", 
+    "name": "bm_cq", 
+    "src": [
+      "test/cpp/microbenchmarks/bm_cq.cc"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "benchmark", 
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc++", 
+      "grpc++_test_util", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "c++", 
     "name": "bm_fullstack", 
     "src": [
       "test/cpp/microbenchmarks/bm_fullstack.cc"
diff --git a/tools/run_tests/generated/tests.json b/tools/run_tests/generated/tests.json
index 0cfdab4c5e..142e5bea4a 100644
--- a/tools/run_tests/generated/tests.json
+++ b/tools/run_tests/generated/tests.json
@@ -2484,6 +2484,28 @@
     "flaky": false, 
     "gtest": false, 
     "language": "c++", 
+    "name": "bm_cq", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "--benchmark_min_time=0"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "gtest": false, 
+    "language": "c++", 
     "name": "bm_fullstack", 
     "platforms": [
       "linux", 
diff --git a/tools/run_tests/run_microbenchmark.py b/tools/run_tests/run_microbenchmark.py
index d709cfc92a..a60178d2dd 100755
--- a/tools/run_tests/run_microbenchmark.py
+++ b/tools/run_tests/run_microbenchmark.py
@@ -199,7 +199,7 @@ argp.add_argument('-c', '--collect',
                   default=sorted(collectors.keys()),
                   help='Which collectors should be run against each benchmark')
 argp.add_argument('-b', '--benchmarks',
-                  default=['bm_fullstack', 'bm_closure'],
+                  default=['bm_fullstack', 'bm_closure', 'bm_cq'],
                   nargs='+',
                   type=str,
                   help='Which microbenchmarks should be run')
diff --git a/tools/run_tests/sanity/check_submodules.sh b/tools/run_tests/sanity/check_submodules.sh
index 0b68319d29..cfe4e2731c 100755
--- a/tools/run_tests/sanity/check_submodules.sh
+++ b/tools/run_tests/sanity/check_submodules.sh
@@ -44,7 +44,7 @@ cat << EOF | awk '{ print $1 }' | sort > $want_submodules
  44c25c892a6229b20db7cd9dc05584ea865896de third_party/benchmark (v0.1.0-343-g44c25c8)
  78684e5b222645828ca302e56b40b9daff2b2d27 third_party/boringssl (78684e5)
  886e7d75368e3f4fab3f4d0d3584e4abfc557755 third_party/boringssl-with-bazel (version_for_cocoapods_7.0-857-g886e7d7)
- f8a0efe03aa69b3336d8e228b37d4ccb17324b88 third_party/gflags (v2.2.0)
+ 30dbc81fb5ffdc98ea9b14b1918bfe4e8779b26e third_party/gflags (v2.2.0)
  c99458533a9b4c743ed51537e25989ea55944908 third_party/googletest (release-1.7.0)
  a428e42072765993ff674fda72863c9f1aa2d268 third_party/protobuf (v3.1.0-alpha-1)
  bcad91771b7f0bff28a1cac1981d7ef2b9bcef3c third_party/thrift (bcad917)
diff --git a/vsprojects/buildtests_c.sln b/vsprojects/buildtests_c.sln
index ca7f969aa1..12a45ee1f8 100644
--- a/vsprojects/buildtests_c.sln
+++ b/vsprojects/buildtests_c.sln
@@ -1071,39 +1071,6 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "initial_settings_frame_bad_
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "internal_api_canary_iomgr_test", "vcxproj\test\internal_api_canary_iomgr_test\internal_api_canary_iomgr_test.vcxproj", "{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
-		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "internal_api_canary_support_test", "vcxproj\test\internal_api_canary_support_test\internal_api_canary_support_test.vcxproj", "{D53575C6-713C-E6E3-FD74-E65F20916498}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
-		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "internal_api_canary_transport_test", "vcxproj\test\internal_api_canary_transport_test\internal_api_canary_transport_test.vcxproj", "{ED24E700-964E-B426-6A6A-1944E2EF7BCB}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
-		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "invalid_call_argument_test", "vcxproj\test\invalid_call_argument_test\invalid_call_argument_test.vcxproj", "{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -3218,54 +3185,6 @@ Global
 		{6756895E-05BF-8CC7-58F2-868DF0C0300C}.Release-DLL|Win32.Build.0 = Release|Win32
 		{6756895E-05BF-8CC7-58F2-868DF0C0300C}.Release-DLL|x64.ActiveCfg = Release|x64
 		{6756895E-05BF-8CC7-58F2-868DF0C0300C}.Release-DLL|x64.Build.0 = Release|x64
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Debug|Win32.ActiveCfg = Debug|Win32
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Debug|x64.ActiveCfg = Debug|x64
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Release|Win32.ActiveCfg = Release|Win32
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Release|x64.ActiveCfg = Release|x64
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Debug|Win32.Build.0 = Debug|Win32
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Debug|x64.Build.0 = Debug|x64
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Release|Win32.Build.0 = Release|Win32
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Release|x64.Build.0 = Release|x64
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Debug-DLL|x64.Build.0 = Debug|x64
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Release-DLL|Win32.Build.0 = Release|Win32
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Release-DLL|x64.ActiveCfg = Release|x64
-		{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}.Release-DLL|x64.Build.0 = Release|x64
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Debug|Win32.ActiveCfg = Debug|Win32
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Debug|x64.ActiveCfg = Debug|x64
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Release|Win32.ActiveCfg = Release|Win32
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Release|x64.ActiveCfg = Release|x64
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Debug|Win32.Build.0 = Debug|Win32
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Debug|x64.Build.0 = Debug|x64
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Release|Win32.Build.0 = Release|Win32
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Release|x64.Build.0 = Release|x64
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Debug-DLL|x64.Build.0 = Debug|x64
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Release-DLL|Win32.Build.0 = Release|Win32
-		{D53575C6-713C-E6E3-FD74-E65F20916498}.Release-DLL|x64.ActiveCfg = Release|x64
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