diff --git a/BUILD b/BUILD
index 12fd6488b6bf480912dfe359f9638687a2665e02..916f24eaf6857708ddde1c26103099f4e8279b7f 100644
--- a/BUILD
+++ b/BUILD
@@ -186,6 +186,8 @@ cc_library(
     "src/core/json/json_common.h",
     "src/core/json/json_reader.h",
     "src/core/json/json_writer.h",
+    "src/core/profiling/timers.h",
+    "src/core/profiling/timers_preciseclock.h",
     "src/core/statistics/census_interface.h",
     "src/core/statistics/census_log.h",
     "src/core/statistics/census_rpc_stats.h",
@@ -298,6 +300,7 @@ cc_library(
     "src/core/json/json_reader.c",
     "src/core/json/json_string.c",
     "src/core/json/json_writer.c",
+    "src/core/profiling/timers.c",
     "src/core/statistics/census_init.c",
     "src/core/statistics/census_log.c",
     "src/core/statistics/census_rpc_stats.c",
@@ -414,6 +417,8 @@ cc_library(
     "src/core/json/json_common.h",
     "src/core/json/json_reader.h",
     "src/core/json/json_writer.h",
+    "src/core/profiling/timers.h",
+    "src/core/profiling/timers_preciseclock.h",
     "src/core/statistics/census_interface.h",
     "src/core/statistics/census_log.h",
     "src/core/statistics/census_rpc_stats.h",
@@ -506,6 +511,7 @@ cc_library(
     "src/core/json/json_reader.c",
     "src/core/json/json_string.c",
     "src/core/json/json_writer.c",
+    "src/core/profiling/timers.c",
     "src/core/statistics/census_init.c",
     "src/core/statistics/census_log.c",
     "src/core/statistics/census_rpc_stats.c",
diff --git a/Makefile b/Makefile
index b86e76ac95d1c2b67abf3b8281eea63b9001e873..f42213def4c359b78f1b3b6b83042286ff502910 100644
--- a/Makefile
+++ b/Makefile
@@ -85,6 +85,15 @@ CPPFLAGS_opt = -O2
 LDFLAGS_opt =
 DEFINES_opt = NDEBUG
 
+VALID_CONFIG_latprof = 1
+CC_latprof = $(DEFAULT_CC)
+CXX_latprof = $(DEFAULT_CXX)
+LD_latprof = $(DEFAULT_CC)
+LDXX_latprof = $(DEFAULT_CXX)
+CPPFLAGS_latprof = -O2 -DGRPC_LATENCY_PROFILER
+LDFLAGS_latprof =
+DEFINES_latprof = NDEBUG
+
 VALID_CONFIG_dbg = 1
 CC_dbg = $(DEFAULT_CC)
 CXX_dbg = $(DEFAULT_CXX)
@@ -621,6 +630,7 @@ tcp_server_posix_test: $(BINDIR)/$(CONFIG)/tcp_server_posix_test
 time_averaged_stats_test: $(BINDIR)/$(CONFIG)/time_averaged_stats_test
 time_test: $(BINDIR)/$(CONFIG)/time_test
 timeout_encoding_test: $(BINDIR)/$(CONFIG)/timeout_encoding_test
+timers_test: $(BINDIR)/$(CONFIG)/timers_test
 transport_metadata_test: $(BINDIR)/$(CONFIG)/transport_metadata_test
 transport_security_test: $(BINDIR)/$(CONFIG)/transport_security_test
 async_end2end_test: $(BINDIR)/$(CONFIG)/async_end2end_test
@@ -1081,7 +1091,7 @@ privatelibs_cxx:  $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/
 
 buildtests: buildtests_c buildtests_cxx
 
-buildtests_c: privatelibs_c $(BINDIR)/$(CONFIG)/alarm_heap_test $(BINDIR)/$(CONFIG)/alarm_list_test $(BINDIR)/$(CONFIG)/alarm_test $(BINDIR)/$(CONFIG)/alpn_test $(BINDIR)/$(CONFIG)/bin_encoder_test $(BINDIR)/$(CONFIG)/census_hash_table_test $(BINDIR)/$(CONFIG)/census_statistics_multiple_writers_circular_buffer_test $(BINDIR)/$(CONFIG)/census_statistics_multiple_writers_test $(BINDIR)/$(CONFIG)/census_statistics_performance_test $(BINDIR)/$(CONFIG)/census_statistics_quick_test $(BINDIR)/$(CONFIG)/census_statistics_small_log_test $(BINDIR)/$(CONFIG)/census_stub_test $(BINDIR)/$(CONFIG)/census_window_stats_test $(BINDIR)/$(CONFIG)/chttp2_status_conversion_test $(BINDIR)/$(CONFIG)/chttp2_stream_encoder_test $(BINDIR)/$(CONFIG)/chttp2_stream_map_test $(BINDIR)/$(CONFIG)/chttp2_transport_end2end_test $(BINDIR)/$(CONFIG)/dualstack_socket_test $(BINDIR)/$(CONFIG)/echo_client $(BINDIR)/$(CONFIG)/echo_server $(BINDIR)/$(CONFIG)/echo_test $(BINDIR)/$(CONFIG)/fd_posix_test $(BINDIR)/$(CONFIG)/fling_client $(BINDIR)/$(CONFIG)/fling_server $(BINDIR)/$(CONFIG)/fling_stream_test $(BINDIR)/$(CONFIG)/fling_test $(BINDIR)/$(CONFIG)/gpr_cancellable_test $(BINDIR)/$(CONFIG)/gpr_cmdline_test $(BINDIR)/$(CONFIG)/gpr_env_test $(BINDIR)/$(CONFIG)/gpr_file_test $(BINDIR)/$(CONFIG)/gpr_histogram_test $(BINDIR)/$(CONFIG)/gpr_host_port_test $(BINDIR)/$(CONFIG)/gpr_log_test $(BINDIR)/$(CONFIG)/gpr_slice_buffer_test $(BINDIR)/$(CONFIG)/gpr_slice_test $(BINDIR)/$(CONFIG)/gpr_string_test $(BINDIR)/$(CONFIG)/gpr_sync_test $(BINDIR)/$(CONFIG)/gpr_thd_test $(BINDIR)/$(CONFIG)/gpr_time_test $(BINDIR)/$(CONFIG)/gpr_tls_test $(BINDIR)/$(CONFIG)/gpr_useful_test $(BINDIR)/$(CONFIG)/grpc_base64_test $(BINDIR)/$(CONFIG)/grpc_byte_buffer_reader_test $(BINDIR)/$(CONFIG)/grpc_channel_stack_test $(BINDIR)/$(CONFIG)/grpc_completion_queue_test $(BINDIR)/$(CONFIG)/grpc_credentials_test $(BINDIR)/$(CONFIG)/grpc_json_token_test $(BINDIR)/$(CONFIG)/grpc_stream_op_test $(BINDIR)/$(CONFIG)/hpack_parser_test $(BINDIR)/$(CONFIG)/hpack_table_test $(BINDIR)/$(CONFIG)/httpcli_format_request_test $(BINDIR)/$(CONFIG)/httpcli_parser_test $(BINDIR)/$(CONFIG)/httpcli_test $(BINDIR)/$(CONFIG)/json_rewrite $(BINDIR)/$(CONFIG)/json_rewrite_test $(BINDIR)/$(CONFIG)/json_test $(BINDIR)/$(CONFIG)/lame_client_test $(BINDIR)/$(CONFIG)/message_compress_test $(BINDIR)/$(CONFIG)/metadata_buffer_test $(BINDIR)/$(CONFIG)/multi_init_test $(BINDIR)/$(CONFIG)/murmur_hash_test $(BINDIR)/$(CONFIG)/no_server_test $(BINDIR)/$(CONFIG)/poll_kick_posix_test $(BINDIR)/$(CONFIG)/resolve_address_test $(BINDIR)/$(CONFIG)/secure_endpoint_test $(BINDIR)/$(CONFIG)/sockaddr_utils_test $(BINDIR)/$(CONFIG)/tcp_client_posix_test $(BINDIR)/$(CONFIG)/tcp_posix_test $(BINDIR)/$(CONFIG)/tcp_server_posix_test $(BINDIR)/$(CONFIG)/time_averaged_stats_test $(BINDIR)/$(CONFIG)/time_test $(BINDIR)/$(CONFIG)/timeout_encoding_test $(BINDIR)/$(CONFIG)/transport_metadata_test $(BINDIR)/$(CONFIG)/transport_security_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_no_op_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_thread_stress_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_writes_done_hangs_with_pending_read_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_accept_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_accept_and_writes_closed_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_invoke_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_before_invoke_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_in_a_vacuum_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_census_simple_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_disappearing_server_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_early_server_shutdown_finishes_inflight_calls_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_early_server_shutdown_finishes_tags_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_graceful_server_shutdown_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_invoke_large_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_max_concurrent_streams_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_no_op_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_ping_pong_streaming_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_binary_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_trailing_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_with_large_metadata_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_with_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_simple_delayed_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_simple_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_thread_stress_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_writes_done_hangs_with_pending_read_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_no_op_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_thread_stress_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_writes_done_hangs_with_pending_read_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_accept_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_accept_and_writes_closed_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_invoke_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_before_invoke_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_in_a_vacuum_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_census_simple_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_disappearing_server_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_inflight_calls_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_tags_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_graceful_server_shutdown_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_invoke_large_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_max_concurrent_streams_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_no_op_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_ping_pong_streaming_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_binary_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_large_metadata_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_delayed_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_thread_stress_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_writes_done_hangs_with_pending_read_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_no_op_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_thread_stress_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_writes_done_hangs_with_pending_read_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_after_accept_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_after_accept_and_writes_closed_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_after_invoke_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_before_invoke_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_in_a_vacuum_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_census_simple_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_disappearing_server_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_early_server_shutdown_finishes_inflight_calls_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_early_server_shutdown_finishes_tags_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_graceful_server_shutdown_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_invoke_large_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_max_concurrent_streams_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_no_op_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_ping_pong_streaming_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_binary_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_with_large_metadata_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_with_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_simple_delayed_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_simple_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_thread_stress_legacy_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_writes_done_hangs_with_pending_read_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_no_op_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_thread_stress_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_writes_done_hangs_with_pending_read_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_accept_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_accept_and_writes_closed_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_invoke_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_before_invoke_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_in_a_vacuum_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_census_simple_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_disappearing_server_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_early_server_shutdown_finishes_inflight_calls_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_early_server_shutdown_finishes_tags_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_graceful_server_shutdown_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_invoke_large_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_max_concurrent_streams_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_no_op_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_ping_pong_streaming_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_binary_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_trailing_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_with_large_metadata_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_with_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_simple_delayed_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_simple_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_thread_stress_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_writes_done_hangs_with_pending_read_legacy_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_invoke_test 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$(BINDIR)/$(CONFIG)/chttp2_socket_pair_invoke_large_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_max_concurrent_streams_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_no_op_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_ping_pong_streaming_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_binary_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_large_metadata_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_delayed_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_thread_stress_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_writes_done_hangs_with_pending_read_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_no_op_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_thread_stress_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_writes_done_hangs_with_pending_read_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_census_simple_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_disappearing_server_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_no_op_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_payload_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_request_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_thread_stress_legacy_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_writes_done_hangs_with_pending_read_legacy_test
 
 buildtests_cxx: privatelibs_cxx $(BINDIR)/$(CONFIG)/async_end2end_test $(BINDIR)/$(CONFIG)/channel_arguments_test $(BINDIR)/$(CONFIG)/cli_call_test $(BINDIR)/$(CONFIG)/credentials_test $(BINDIR)/$(CONFIG)/cxx_time_test $(BINDIR)/$(CONFIG)/end2end_test $(BINDIR)/$(CONFIG)/generic_end2end_test $(BINDIR)/$(CONFIG)/grpc_cli $(BINDIR)/$(CONFIG)/interop_client $(BINDIR)/$(CONFIG)/interop_server $(BINDIR)/$(CONFIG)/interop_test $(BINDIR)/$(CONFIG)/pubsub_client $(BINDIR)/$(CONFIG)/pubsub_publisher_test $(BINDIR)/$(CONFIG)/pubsub_subscriber_test $(BINDIR)/$(CONFIG)/qps_driver $(BINDIR)/$(CONFIG)/qps_smoke_test $(BINDIR)/$(CONFIG)/qps_worker $(BINDIR)/$(CONFIG)/status_test $(BINDIR)/$(CONFIG)/thread_pool_test
 
@@ -1220,6 +1230,8 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/time_test || ( echo test time_test failed ; exit 1 )
 	$(E) "[RUN]     Testing timeout_encoding_test"
 	$(Q) $(BINDIR)/$(CONFIG)/timeout_encoding_test || ( echo test timeout_encoding_test failed ; exit 1 )
+	$(E) "[RUN]     Testing timers_test"
+	$(Q) $(BINDIR)/$(CONFIG)/timers_test || ( echo test timers_test failed ; exit 1 )
 	$(E) "[RUN]     Testing transport_metadata_test"
 	$(Q) $(BINDIR)/$(CONFIG)/transport_metadata_test || ( echo test transport_metadata_test failed ; exit 1 )
 	$(E) "[RUN]     Testing transport_security_test"
@@ -2634,6 +2646,7 @@ LIBGRPC_SRC = \
     src/core/json/json_reader.c \
     src/core/json/json_string.c \
     src/core/json/json_writer.c \
+    src/core/profiling/timers.c \
     src/core/statistics/census_init.c \
     src/core/statistics/census_log.c \
     src/core/statistics/census_rpc_stats.c \
@@ -2782,6 +2795,7 @@ src/core/json/json.c: $(OPENSSL_DEP)
 src/core/json/json_reader.c: $(OPENSSL_DEP)
 src/core/json/json_string.c: $(OPENSSL_DEP)
 src/core/json/json_writer.c: $(OPENSSL_DEP)
+src/core/profiling/timers.c: $(OPENSSL_DEP)
 src/core/statistics/census_init.c: $(OPENSSL_DEP)
 src/core/statistics/census_log.c: $(OPENSSL_DEP)
 src/core/statistics/census_rpc_stats.c: $(OPENSSL_DEP)
@@ -2946,6 +2960,7 @@ $(OBJDIR)/$(CONFIG)/src/core/json/json.o:
 $(OBJDIR)/$(CONFIG)/src/core/json/json_reader.o: 
 $(OBJDIR)/$(CONFIG)/src/core/json/json_string.o: 
 $(OBJDIR)/$(CONFIG)/src/core/json/json_writer.o: 
+$(OBJDIR)/$(CONFIG)/src/core/profiling/timers.o: 
 $(OBJDIR)/$(CONFIG)/src/core/statistics/census_init.o: 
 $(OBJDIR)/$(CONFIG)/src/core/statistics/census_log.o: 
 $(OBJDIR)/$(CONFIG)/src/core/statistics/census_rpc_stats.o: 
@@ -3126,6 +3141,7 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/json/json_reader.c \
     src/core/json/json_string.c \
     src/core/json/json_writer.c \
+    src/core/profiling/timers.c \
     src/core/statistics/census_init.c \
     src/core/statistics/census_log.c \
     src/core/statistics/census_rpc_stats.c \
@@ -3267,6 +3283,7 @@ $(OBJDIR)/$(CONFIG)/src/core/json/json.o:
 $(OBJDIR)/$(CONFIG)/src/core/json/json_reader.o: 
 $(OBJDIR)/$(CONFIG)/src/core/json/json_string.o: 
 $(OBJDIR)/$(CONFIG)/src/core/json/json_writer.o: 
+$(OBJDIR)/$(CONFIG)/src/core/profiling/timers.o: 
 $(OBJDIR)/$(CONFIG)/src/core/statistics/census_init.o: 
 $(OBJDIR)/$(CONFIG)/src/core/statistics/census_log.o: 
 $(OBJDIR)/$(CONFIG)/src/core/statistics/census_rpc_stats.o: 
@@ -8295,6 +8312,37 @@ endif
 endif
 
 
+TIMERS_TEST_SRC = \
+    test/core/profiling/timers_test.c \
+
+TIMERS_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(TIMERS_TEST_SRC))))
+
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL with ALPN.
+
+$(BINDIR)/$(CONFIG)/timers_test: openssl_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/timers_test: $(TIMERS_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) $(TIMERS_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)/timers_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/profiling/timers_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_timers_test: $(TIMERS_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(TIMERS_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 TRANSPORT_METADATA_TEST_SRC = \
     test/core/transport/metadata_test.c \
 
diff --git a/build.json b/build.json
index cb8d9433cf01dc14e7ceb1d4622b370a599c7eb6..0dfe7a18401fdf8609ab76832b8308f394b58970 100644
--- a/build.json
+++ b/build.json
@@ -137,6 +137,8 @@
         "src/core/json/json_common.h",
         "src/core/json/json_reader.h",
         "src/core/json/json_writer.h",
+        "src/core/profiling/timers.h",
+        "src/core/profiling/timers_preciseclock.h",
         "src/core/statistics/census_interface.h",
         "src/core/statistics/census_log.h",
         "src/core/statistics/census_rpc_stats.h",
@@ -230,6 +232,7 @@
         "src/core/json/json_reader.c",
         "src/core/json/json_string.c",
         "src/core/json/json_writer.c",
+        "src/core/profiling/timers.c",
         "src/core/statistics/census_init.c",
         "src/core/statistics/census_log.c",
         "src/core/statistics/census_rpc_stats.c",
@@ -1765,6 +1768,20 @@
         "gpr"
       ]
     },
+    {
+      "name": "timers_test",
+      "build": "test",
+      "language": "c",
+      "src": [
+        "test/core/profiling/timers_test.c"
+      ],
+      "deps": [
+        "grpc_test_util",
+        "grpc",
+        "gpr_test_util",
+        "gpr"
+      ]
+    },
     {
       "name": "transport_metadata_test",
       "build": "test",
diff --git a/src/core/profiling/timers.c b/src/core/profiling/timers.c
new file mode 100644
index 0000000000000000000000000000000000000000..478397d1bfc543c6fdacfe062623cf4f5b2a8c7d
--- /dev/null
+++ b/src/core/profiling/timers.c
@@ -0,0 +1,138 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#ifdef GRPC_LATENCY_PROFILER
+
+#include "src/core/profiling/timers.h"
+#include "src/core/profiling/timers_preciseclock.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/time.h>
+#include <grpc/support/sync.h>
+#include <stdio.h>
+
+typedef struct grpc_timer_entry {
+  grpc_precise_clock tm;
+  const char* tag;
+  int seq;
+  const char* file;
+  int line;
+} grpc_timer_entry;
+
+struct grpc_timers_log {
+  gpr_mu mu;
+  grpc_timer_entry* log;
+  int num_entries;
+  int capacity;
+  int capacity_limit;
+  FILE* fp;
+};
+
+grpc_timers_log* grpc_timers_log_global = NULL;
+
+grpc_timers_log* grpc_timers_log_create(int capacity_limit, FILE* dump) {
+  grpc_timers_log* log = gpr_malloc(sizeof(*log));
+
+  /* TODO (vpai): Allow allocation below limit */
+  log->log = gpr_malloc(capacity_limit * sizeof(*log->log));
+
+  /* TODO (vpai): Improve concurrency, do per-thread logging? */
+  gpr_mu_init(&log->mu);
+
+  log->num_entries = 0;
+  log->capacity = log->capacity_limit = capacity_limit;
+
+  log->fp = dump;
+
+  return log;
+}
+
+static void log_report_locked(grpc_timers_log* log) {
+  FILE* fp = log->fp;
+  int i;
+  for (i = 0; i < log->num_entries; i++) {
+    grpc_timer_entry* entry = &(log->log[i]);
+    fprintf(fp, "GRPC_LAT_PROF ");
+    grpc_precise_clock_print(&entry->tm, fp);
+    fprintf(fp, " %s#%d,%s:%d\n", entry->tag, entry->seq, entry->file,
+            entry->line);
+  }
+
+  /* Now clear out the log */
+  log->num_entries = 0;
+}
+
+void grpc_timers_log_destroy(grpc_timers_log* log) {
+  gpr_mu_lock(&log->mu);
+  log_report_locked(log);
+  gpr_mu_unlock(&log->mu);
+
+  gpr_free(log->log);
+  gpr_mu_destroy(&log->mu);
+
+  gpr_free(log);
+}
+
+void grpc_timers_log_add(grpc_timers_log* log, const char* tag, int seq,
+                         const char* file, int line) {
+  grpc_timer_entry* entry;
+
+  /* TODO (vpai) : Improve concurrency */
+  gpr_mu_lock(&log->mu);
+  if (log->num_entries == log->capacity_limit) {
+    log_report_locked(log);
+  }
+
+  entry = &log->log[log->num_entries++];
+
+  grpc_precise_clock_now(&entry->tm);
+  entry->tag = tag;
+  entry->seq = seq;
+  entry->file = file;
+  entry->line = line;
+
+  gpr_mu_unlock(&log->mu);
+}
+
+void grpc_timers_log_global_init(void) {
+  grpc_timers_log_global = grpc_timers_log_create(100000, stdout);
+}
+
+void grpc_timers_log_global_destroy(void) {
+  grpc_timers_log_destroy(grpc_timers_log_global);
+}
+#else  /* !GRPC_LATENCY_PROFILER */
+void grpc_timers_log_global_init(void) {}
+void grpc_timers_log_global_destroy(void) {}
+#endif /* GRPC_LATENCY_PROFILER */
diff --git a/src/core/profiling/timers.h b/src/core/profiling/timers.h
new file mode 100644
index 0000000000000000000000000000000000000000..ef4cad112aeabe6b3ec3d62fa6cdb837ea7ba053
--- /dev/null
+++ b/src/core/profiling/timers.h
@@ -0,0 +1,70 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#ifndef GRPC_CORE_PROFILING_TIMERS_H
+#define GRPC_CORE_PROFILING_TIMERS_H
+
+#include <stdio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef GRPC_LATENCY_PROFILER
+
+typedef struct grpc_timers_log grpc_timers_log;
+
+grpc_timers_log *grpc_timers_log_create(int capacity_limit, FILE *dump);
+void grpc_timers_log_add(grpc_timers_log *, const char *tag, int seq,
+                         const char *file, int line);
+void grpc_timers_log_destroy(grpc_timers_log *);
+
+extern grpc_timers_log *grpc_timers_log_global;
+
+#define GRPC_TIMER_MARK(x, s) \
+  grpc_timers_log_add(grpc_timers_log_global, #x, s, __FILE__, __LINE__)
+
+#else /* !GRPC_LATENCY_PROFILER */
+#define GRPC_TIMER_MARK(x, s) \
+  do {                        \
+  } while (0)
+#endif /* GRPC_LATENCY_PROFILER */
+
+void grpc_timers_log_global_init(void);
+void grpc_timers_log_global_destroy(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_CORE_PROFILING_TIMERS_H */
diff --git a/src/core/profiling/timers_preciseclock.h b/src/core/profiling/timers_preciseclock.h
new file mode 100644
index 0000000000000000000000000000000000000000..bf4a0eab8a4a209b393389c2c3c18eae1c0b10d7
--- /dev/null
+++ b/src/core/profiling/timers_preciseclock.h
@@ -0,0 +1,56 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#ifndef GRPC_CORE_PROFILING_TIMERS_PRECISECLOCK_H
+#define GRPC_CORE_PROFILING_TIMERS_PRECISECLOCK_H
+
+#include <grpc/support/time.h>
+#include <stdio.h>
+
+typedef struct grpc_precise_clock grpc_precise_clock;
+
+#ifdef GRPC_TIMERS_RDTSC
+#error RDTSC timers not currently supported
+#else
+struct grpc_precise_clock {
+  gpr_timespec clock;
+};
+static void grpc_precise_clock_now(grpc_precise_clock* clk) {
+  clk->clock = gpr_now();
+}
+static void grpc_precise_clock_print(const grpc_precise_clock* clk, FILE* fp) {
+  fprintf(fp, "%ld.%09d", clk->clock.tv_sec, clk->clock.tv_nsec);
+}
+#endif /* GRPC_TIMERS_RDTSC */
+
+#endif /* GRPC_CORE_PROFILING_TIMERS_PRECISECLOCK_H */
diff --git a/src/core/surface/init.c b/src/core/surface/init.c
index d4f0eb40e8e717b195f57586cdd0ed247c892f50..4de51a666f11af6ad0b948d537677c0c23097342 100644
--- a/src/core/surface/init.c
+++ b/src/core/surface/init.c
@@ -32,10 +32,11 @@
  */
 
 #include <grpc/grpc.h>
-#include "src/core/iomgr/iomgr.h"
+#include "src/core/channel/channel_stack.h"
 #include "src/core/debug/trace.h"
+#include "src/core/iomgr/iomgr.h"
 #include "src/core/statistics/census_interface.h"
-#include "src/core/channel/channel_stack.h"
+#include "src/core/profiling/timers.h"
 #include "src/core/surface/call.h"
 #include "src/core/surface/init.h"
 #include "src/core/surface/surface_trace.h"
@@ -63,6 +64,7 @@ void grpc_init(void) {
     grpc_tracer_init("GRPC_TRACE");
     grpc_iomgr_init();
     census_init();
+    grpc_timers_log_global_init();
   }
   gpr_mu_unlock(&g_init_mu);
 }
@@ -72,6 +74,7 @@ void grpc_shutdown(void) {
   if (--g_initializations == 0) {
     grpc_iomgr_shutdown();
     census_shutdown();
+    grpc_timers_log_global_destroy();
   }
   gpr_mu_unlock(&g_init_mu);
 }
diff --git a/templates/Makefile.template b/templates/Makefile.template
index 331141fb24572c3b355028cd8ad18870b7684ec7..73f7945074107163448cb289ff29aaf5de401aa7 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -96,6 +96,15 @@ CPPFLAGS_opt = -O2
 LDFLAGS_opt =
 DEFINES_opt = NDEBUG
 
+VALID_CONFIG_latprof = 1
+CC_latprof = $(DEFAULT_CC)
+CXX_latprof = $(DEFAULT_CXX)
+LD_latprof = $(DEFAULT_CC)
+LDXX_latprof = $(DEFAULT_CXX)
+CPPFLAGS_latprof = -O2 -DGRPC_LATENCY_PROFILER
+LDFLAGS_latprof =
+DEFINES_latprof = NDEBUG
+
 VALID_CONFIG_dbg = 1
 CC_dbg = $(DEFAULT_CC)
 CXX_dbg = $(DEFAULT_CXX)
diff --git a/test/core/profiling/timers_test.c b/test/core/profiling/timers_test.c
new file mode 100644
index 0000000000000000000000000000000000000000..55e59c969e8c62a68b48e8b32ce7ec4c46bb5df6
--- /dev/null
+++ b/test/core/profiling/timers_test.c
@@ -0,0 +1,83 @@
+/*
+ *
+ * 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/profiling/timers.h"
+#include <stdlib.h>
+#include "test/core/util/test_config.h"
+
+void test_log_events(int num_seqs) {
+  int start = 0;
+  int *state;
+  state = calloc(num_seqs, sizeof(state[0]));
+  while (start < num_seqs) {
+    int i;
+    int row;
+    if (state[start] == 3) { /* Already done with this posn */
+      start++;
+      continue;
+    }
+
+    row = rand() % 10; /* how many in a row */
+    for (i = start; (i < start + row) && (i < num_seqs); i++) {
+      int j;
+      int advance = 1 + rand() % 3; /* how many to advance by */
+      for (j = 0; j < advance; j++) {
+        switch (state[i]) {
+          case 0:
+            GRPC_TIMER_MARK(STATE_0, i);
+            state[i]++;
+            break;
+          case 1:
+            GRPC_TIMER_MARK(STATE_1, i);
+            state[i]++;
+            break;
+          case 2:
+            GRPC_TIMER_MARK(STATE_2, i);
+            state[i]++;
+            break;
+          case 3:
+            break;
+        }
+      }
+    }
+  }
+  free(state);
+}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+  grpc_timers_log_global_init();
+  test_log_events(1000000);
+  grpc_timers_log_global_destroy();
+  return 0;
+}
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index cb379863f1f10dcb056f10ba60931cc92744c98f..c589320a2a190b5882e45e6d73af7f9703df8263 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -594,6 +594,15 @@
       "posix"
     ]
   }, 
+  {
+    "flaky": false, 
+    "language": "c", 
+    "name": "timers_test", 
+    "platforms": [
+      "windows", 
+      "posix"
+    ]
+  }, 
   {
     "flaky": false, 
     "language": "c", 
diff --git a/vsprojects/vs2010/Grpc.mak b/vsprojects/vs2010/Grpc.mak
index 727aa37781697dfb28b57c838d84ee6038993094..93689a42af309dad7612b5e8257f41b67d481d4a 100644
--- a/vsprojects/vs2010/Grpc.mak
+++ b/vsprojects/vs2010/Grpc.mak
@@ -53,10 +53,10 @@ grpc_test_util:
 $(OUT_DIR):
 	mkdir $(OUT_DIR)
 
-buildtests: alarm_heap_test.exe alarm_list_test.exe alarm_test.exe alpn_test.exe bin_encoder_test.exe census_hash_table_test.exe census_statistics_multiple_writers_circular_buffer_test.exe census_statistics_multiple_writers_test.exe census_statistics_performance_test.exe census_statistics_quick_test.exe census_statistics_small_log_test.exe census_stats_store_test.exe census_stub_test.exe census_trace_store_test.exe census_window_stats_test.exe chttp2_status_conversion_test.exe chttp2_stream_encoder_test.exe chttp2_stream_map_test.exe chttp2_transport_end2end_test.exe dualstack_socket_test.exe echo_test.exe fd_posix_test.exe fling_stream_test.exe fling_test.exe gpr_cancellable_test.exe gpr_cmdline_test.exe gpr_env_test.exe gpr_file_test.exe gpr_histogram_test.exe gpr_host_port_test.exe gpr_log_test.exe gpr_slice_buffer_test.exe gpr_slice_test.exe gpr_string_test.exe gpr_sync_test.exe gpr_thd_test.exe gpr_time_test.exe gpr_tls_test.exe gpr_useful_test.exe grpc_base64_test.exe grpc_byte_buffer_reader_test.exe grpc_channel_stack_test.exe grpc_completion_queue_test.exe grpc_credentials_test.exe grpc_json_token_test.exe grpc_stream_op_test.exe hpack_parser_test.exe hpack_table_test.exe httpcli_format_request_test.exe httpcli_parser_test.exe httpcli_test.exe json_rewrite_test.exe json_test.exe lame_client_test.exe message_compress_test.exe metadata_buffer_test.exe multi_init_test.exe murmur_hash_test.exe no_server_test.exe poll_kick_posix_test.exe resolve_address_test.exe secure_endpoint_test.exe sockaddr_utils_test.exe tcp_client_posix_test.exe tcp_posix_test.exe tcp_server_posix_test.exe time_averaged_stats_test.exe time_test.exe timeout_encoding_test.exe transport_metadata_test.exe transport_security_test.exe 
+buildtests: alarm_heap_test.exe alarm_list_test.exe alarm_test.exe alpn_test.exe bin_encoder_test.exe census_hash_table_test.exe census_statistics_multiple_writers_circular_buffer_test.exe census_statistics_multiple_writers_test.exe census_statistics_performance_test.exe census_statistics_quick_test.exe census_statistics_small_log_test.exe census_stats_store_test.exe census_stub_test.exe census_trace_store_test.exe census_window_stats_test.exe chttp2_status_conversion_test.exe chttp2_stream_encoder_test.exe chttp2_stream_map_test.exe chttp2_transport_end2end_test.exe dualstack_socket_test.exe echo_test.exe fd_posix_test.exe fling_stream_test.exe fling_test.exe gpr_cancellable_test.exe gpr_cmdline_test.exe gpr_env_test.exe gpr_file_test.exe gpr_histogram_test.exe gpr_host_port_test.exe gpr_log_test.exe gpr_slice_buffer_test.exe gpr_slice_test.exe gpr_string_test.exe gpr_sync_test.exe gpr_thd_test.exe gpr_time_test.exe gpr_tls_test.exe gpr_useful_test.exe grpc_base64_test.exe grpc_byte_buffer_reader_test.exe grpc_channel_stack_test.exe grpc_completion_queue_test.exe grpc_credentials_test.exe grpc_json_token_test.exe grpc_stream_op_test.exe hpack_parser_test.exe hpack_table_test.exe httpcli_format_request_test.exe httpcli_parser_test.exe httpcli_test.exe json_rewrite_test.exe json_test.exe lame_client_test.exe message_compress_test.exe metadata_buffer_test.exe multi_init_test.exe murmur_hash_test.exe no_server_test.exe poll_kick_posix_test.exe resolve_address_test.exe secure_endpoint_test.exe sockaddr_utils_test.exe tcp_client_posix_test.exe tcp_posix_test.exe tcp_server_posix_test.exe time_averaged_stats_test.exe time_test.exe timeout_encoding_test.exe timers_test.exe transport_metadata_test.exe transport_security_test.exe 
 	echo All tests built.
 
-test: alarm_heap_test alarm_list_test alarm_test alpn_test bin_encoder_test census_hash_table_test census_statistics_multiple_writers_circular_buffer_test census_statistics_multiple_writers_test census_statistics_performance_test census_statistics_quick_test census_statistics_small_log_test census_stats_store_test census_stub_test census_trace_store_test census_window_stats_test chttp2_status_conversion_test chttp2_stream_encoder_test chttp2_stream_map_test chttp2_transport_end2end_test dualstack_socket_test echo_test fd_posix_test fling_stream_test fling_test gpr_cancellable_test gpr_cmdline_test gpr_env_test gpr_file_test gpr_histogram_test gpr_host_port_test gpr_log_test gpr_slice_buffer_test gpr_slice_test gpr_string_test gpr_sync_test gpr_thd_test gpr_time_test gpr_tls_test gpr_useful_test grpc_base64_test grpc_byte_buffer_reader_test grpc_channel_stack_test grpc_completion_queue_test grpc_credentials_test grpc_json_token_test grpc_stream_op_test hpack_parser_test hpack_table_test httpcli_format_request_test httpcli_parser_test httpcli_test json_rewrite_test json_test lame_client_test message_compress_test metadata_buffer_test multi_init_test murmur_hash_test no_server_test poll_kick_posix_test resolve_address_test secure_endpoint_test sockaddr_utils_test tcp_client_posix_test tcp_posix_test tcp_server_posix_test time_averaged_stats_test time_test timeout_encoding_test transport_metadata_test transport_security_test 
+test: alarm_heap_test alarm_list_test alarm_test alpn_test bin_encoder_test census_hash_table_test census_statistics_multiple_writers_circular_buffer_test census_statistics_multiple_writers_test census_statistics_performance_test census_statistics_quick_test census_statistics_small_log_test census_stats_store_test census_stub_test census_trace_store_test census_window_stats_test chttp2_status_conversion_test chttp2_stream_encoder_test chttp2_stream_map_test chttp2_transport_end2end_test dualstack_socket_test echo_test fd_posix_test fling_stream_test fling_test gpr_cancellable_test gpr_cmdline_test gpr_env_test gpr_file_test gpr_histogram_test gpr_host_port_test gpr_log_test gpr_slice_buffer_test gpr_slice_test gpr_string_test gpr_sync_test gpr_thd_test gpr_time_test gpr_tls_test gpr_useful_test grpc_base64_test grpc_byte_buffer_reader_test grpc_channel_stack_test grpc_completion_queue_test grpc_credentials_test grpc_json_token_test grpc_stream_op_test hpack_parser_test hpack_table_test httpcli_format_request_test httpcli_parser_test httpcli_test json_rewrite_test json_test lame_client_test message_compress_test metadata_buffer_test multi_init_test murmur_hash_test no_server_test poll_kick_posix_test resolve_address_test secure_endpoint_test sockaddr_utils_test tcp_client_posix_test tcp_posix_test tcp_server_posix_test time_averaged_stats_test time_test timeout_encoding_test timers_test transport_metadata_test transport_security_test 
 	echo All tests ran.
 
 test_gpr: gpr_cancellable_test gpr_cmdline_test gpr_env_test gpr_file_test gpr_histogram_test gpr_host_port_test gpr_log_test gpr_slice_buffer_test gpr_slice_test gpr_string_test gpr_sync_test gpr_thd_test gpr_time_test gpr_tls_test gpr_useful_test 
@@ -702,6 +702,14 @@ timeout_encoding_test: timeout_encoding_test.exe
 	echo Running timeout_encoding_test
 	$(OUT_DIR)\timeout_encoding_test.exe
 
+timers_test.exe: grpc_test_util
+	echo Building timers_test
+	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ ..\..\test\core\profiling\timers_test.c 
+	$(LINK) $(LFLAGS) /OUT:"$(OUT_DIR)\timers_test.exe" Debug\grpc_test_util.lib Debug\grpc.lib Debug\gpr_test_util.lib Debug\gpr.lib $(LIBS) $(OUT_DIR)\timers_test.obj 
+timers_test: timers_test.exe
+	echo Running timers_test
+	$(OUT_DIR)\timers_test.exe
+
 transport_metadata_test.exe: grpc_test_util
 	echo Building transport_metadata_test
 	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ ..\..\test\core\transport\metadata_test.c 
diff --git a/vsprojects/vs2010/grpc.vcxproj b/vsprojects/vs2010/grpc.vcxproj
index 02d1f2643e1d5a6714c9a6767b2d61f3bd52699e..d18c33bf276f663994cfafb12137f19d03825304 100644
--- a/vsprojects/vs2010/grpc.vcxproj
+++ b/vsprojects/vs2010/grpc.vcxproj
@@ -148,6 +148,8 @@
     <ClInclude Include="..\..\src\core\json\json_common.h" />
     <ClInclude Include="..\..\src\core\json\json_reader.h" />
     <ClInclude Include="..\..\src\core\json\json_writer.h" />
+    <ClInclude Include="..\..\src\core\profiling\timers.h" />
+    <ClInclude Include="..\..\src\core\profiling\timers_preciseclock.h" />
     <ClInclude Include="..\..\src\core\statistics\census_interface.h" />
     <ClInclude Include="..\..\src\core\statistics\census_log.h" />
     <ClInclude Include="..\..\src\core\statistics\census_rpc_stats.h" />
@@ -336,6 +338,8 @@
     </ClCompile>
     <ClCompile Include="..\..\src\core\json\json_writer.c">
     </ClCompile>
+    <ClCompile Include="..\..\src\core\profiling\timers.c">
+    </ClCompile>
     <ClCompile Include="..\..\src\core\statistics\census_init.c">
     </ClCompile>
     <ClCompile Include="..\..\src\core\statistics\census_log.c">
diff --git a/vsprojects/vs2010/grpc.vcxproj.filters b/vsprojects/vs2010/grpc.vcxproj.filters
index a010639ad1333cf6b4acdf89176a65a731233cc3..7774a780402d9bb3ad608dcfd1ff42d90036287b 100644
--- a/vsprojects/vs2010/grpc.vcxproj.filters
+++ b/vsprojects/vs2010/grpc.vcxproj.filters
@@ -223,6 +223,9 @@
     <ClCompile Include="..\..\src\core\json\json_writer.c">
       <Filter>src\core\json</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\core\profiling\timers.c">
+      <Filter>src\core\profiling</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\core\statistics\census_init.c">
       <Filter>src\core\statistics</Filter>
     </ClCompile>
@@ -569,6 +572,12 @@
     <ClInclude Include="..\..\src\core\json\json_writer.h">
       <Filter>src\core\json</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\core\profiling\timers.h">
+      <Filter>src\core\profiling</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\src\core\profiling\timers_preciseclock.h">
+      <Filter>src\core\profiling</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\src\core\statistics\census_interface.h">
       <Filter>src\core\statistics</Filter>
     </ClInclude>
@@ -716,6 +725,9 @@
     <Filter Include="src\core\json">
       <UniqueIdentifier>{e665cc0e-b994-d7c5-cc18-2007392019f0}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\profiling">
+      <UniqueIdentifier>{87674b72-0f05-0469-481a-bd8c7af9ad80}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\security">
       <UniqueIdentifier>{1d850ac6-e639-4eab-5338-4ba40272fcc9}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vs2010/grpc_unsecure.vcxproj b/vsprojects/vs2010/grpc_unsecure.vcxproj
index 651f38ae34296f6f2147399df2ae1c0a1e281105..78d538b70e1a24a2c42579dd6514c763165ae9ab 100644
--- a/vsprojects/vs2010/grpc_unsecure.vcxproj
+++ b/vsprojects/vs2010/grpc_unsecure.vcxproj
@@ -132,6 +132,8 @@
     <ClInclude Include="..\..\src\core\json\json_common.h" />
     <ClInclude Include="..\..\src\core\json\json_reader.h" />
     <ClInclude Include="..\..\src\core\json\json_writer.h" />
+    <ClInclude Include="..\..\src\core\profiling\timers.h" />
+    <ClInclude Include="..\..\src\core\profiling\timers_preciseclock.h" />
     <ClInclude Include="..\..\src\core\statistics\census_interface.h" />
     <ClInclude Include="..\..\src\core\statistics\census_log.h" />
     <ClInclude Include="..\..\src\core\statistics\census_rpc_stats.h" />
@@ -280,6 +282,8 @@
     </ClCompile>
     <ClCompile Include="..\..\src\core\json\json_writer.c">
     </ClCompile>
+    <ClCompile Include="..\..\src\core\profiling\timers.c">
+    </ClCompile>
     <ClCompile Include="..\..\src\core\statistics\census_init.c">
     </ClCompile>
     <ClCompile Include="..\..\src\core\statistics\census_log.c">
diff --git a/vsprojects/vs2010/grpc_unsecure.vcxproj.filters b/vsprojects/vs2010/grpc_unsecure.vcxproj.filters
index 7757a44aecb92d5f5d2bfcbfecd39e809e6acb98..cec8f78bae629e75bd36e30ece7b844db58f8198 100644
--- a/vsprojects/vs2010/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vs2010/grpc_unsecure.vcxproj.filters
@@ -163,6 +163,9 @@
     <ClCompile Include="..\..\src\core\json\json_writer.c">
       <Filter>src\core\json</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\core\profiling\timers.c">
+      <Filter>src\core\profiling</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\core\statistics\census_init.c">
       <Filter>src\core\statistics</Filter>
     </ClCompile>
@@ -461,6 +464,12 @@
     <ClInclude Include="..\..\src\core\json\json_writer.h">
       <Filter>src\core\json</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\core\profiling\timers.h">
+      <Filter>src\core\profiling</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\src\core\profiling\timers_preciseclock.h">
+      <Filter>src\core\profiling</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\src\core\statistics\census_interface.h">
       <Filter>src\core\statistics</Filter>
     </ClInclude>
@@ -605,6 +614,9 @@
     <Filter Include="src\core\json">
       <UniqueIdentifier>{443ffc61-1bea-2477-6e54-1ddf8c139264}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\profiling">
+      <UniqueIdentifier>{7f91d9bf-c9de-835a-d74d-b16f843b89a9}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\statistics">
       <UniqueIdentifier>{e084164c-a069-00e3-db35-4e0b1cd6f0b7}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vs2013/Grpc.mak b/vsprojects/vs2013/Grpc.mak
index c2c25ced69a417d113f171d0ddf2be3c73684330..1a96a2f3f8d4548dcec6bc9351b7dc633097b031 100644
--- a/vsprojects/vs2013/Grpc.mak
+++ b/vsprojects/vs2013/Grpc.mak
@@ -55,7 +55,7 @@ $(OUT_DIR):
 
 buildtests: buildtests_c buildtests_cxx
 
-buildtests_c: alarm_heap_test.exe alarm_list_test.exe alarm_test.exe alpn_test.exe bin_encoder_test.exe census_hash_table_test.exe census_statistics_multiple_writers_circular_buffer_test.exe census_statistics_multiple_writers_test.exe census_statistics_performance_test.exe census_statistics_quick_test.exe census_statistics_small_log_test.exe census_stub_test.exe census_window_stats_test.exe chttp2_status_conversion_test.exe chttp2_stream_encoder_test.exe chttp2_stream_map_test.exe chttp2_transport_end2end_test.exe echo_client.exe echo_server.exe echo_test.exe fd_posix_test.exe fling_client.exe fling_server.exe fling_stream_test.exe fling_test.exe gpr_cancellable_test.exe gpr_cmdline_test.exe gpr_env_test.exe gpr_file_test.exe gpr_histogram_test.exe gpr_host_port_test.exe gpr_log_test.exe gpr_slice_buffer_test.exe gpr_slice_test.exe gpr_string_test.exe gpr_sync_test.exe gpr_thd_test.exe gpr_time_test.exe gpr_tls_test.exe gpr_useful_test.exe grpc_base64_test.exe grpc_byte_buffer_reader_test.exe grpc_channel_stack_test.exe grpc_completion_queue_test.exe grpc_credentials_test.exe grpc_json_token_test.exe grpc_stream_op_test.exe hpack_parser_test.exe hpack_table_test.exe httpcli_format_request_test.exe httpcli_parser_test.exe httpcli_test.exe json_rewrite.exe json_rewrite_test.exe json_test.exe lame_client_test.exe message_compress_test.exe metadata_buffer_test.exe multi_init_test.exe murmur_hash_test.exe no_server_test.exe poll_kick_posix_test.exe resolve_address_test.exe secure_endpoint_test.exe sockaddr_utils_test.exe tcp_client_posix_test.exe tcp_posix_test.exe tcp_server_posix_test.exe time_averaged_stats_test.exe time_test.exe timeout_encoding_test.exe transport_metadata_test.exe transport_security_test.exe 
+buildtests_c: alarm_heap_test.exe alarm_list_test.exe alarm_test.exe alpn_test.exe bin_encoder_test.exe census_hash_table_test.exe census_statistics_multiple_writers_circular_buffer_test.exe census_statistics_multiple_writers_test.exe census_statistics_performance_test.exe census_statistics_quick_test.exe census_statistics_small_log_test.exe census_stub_test.exe census_window_stats_test.exe chttp2_status_conversion_test.exe chttp2_stream_encoder_test.exe chttp2_stream_map_test.exe chttp2_transport_end2end_test.exe echo_client.exe echo_server.exe echo_test.exe fd_posix_test.exe fling_client.exe fling_server.exe fling_stream_test.exe fling_test.exe gpr_cancellable_test.exe gpr_cmdline_test.exe gpr_env_test.exe gpr_file_test.exe gpr_histogram_test.exe gpr_host_port_test.exe gpr_log_test.exe gpr_slice_buffer_test.exe gpr_slice_test.exe gpr_string_test.exe gpr_sync_test.exe gpr_thd_test.exe gpr_time_test.exe gpr_tls_test.exe gpr_useful_test.exe grpc_base64_test.exe grpc_byte_buffer_reader_test.exe grpc_channel_stack_test.exe grpc_completion_queue_test.exe grpc_credentials_test.exe grpc_json_token_test.exe grpc_stream_op_test.exe hpack_parser_test.exe hpack_table_test.exe httpcli_format_request_test.exe httpcli_parser_test.exe httpcli_test.exe json_rewrite.exe json_rewrite_test.exe json_test.exe lame_client_test.exe message_compress_test.exe metadata_buffer_test.exe multi_init_test.exe murmur_hash_test.exe no_server_test.exe poll_kick_posix_test.exe resolve_address_test.exe secure_endpoint_test.exe sockaddr_utils_test.exe tcp_client_posix_test.exe tcp_posix_test.exe tcp_server_posix_test.exe time_averaged_stats_test.exe time_test.exe timeout_encoding_test.exe timers_test.exe transport_metadata_test.exe transport_security_test.exe 
 	echo All tests built.
 
 buildtests_cxx: 
@@ -693,6 +693,14 @@ timeout_encoding_test: timeout_encoding_test.exe
 	echo Running timeout_encoding_test
 	$(OUT_DIR)\timeout_encoding_test.exe
 
+timers_test.exe: grpc_test_util $(OUT_DIR)
+	echo Building timers_test
+	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ ..\..\test\core\profiling\timers_test.c 
+	$(LINK) $(LFLAGS) /OUT:"$(OUT_DIR)\timers_test.exe" Debug\grpc_test_util.lib Debug\grpc.lib Debug\gpr_test_util.lib Debug\gpr.lib $(LIBS) $(OUT_DIR)\timers_test.obj 
+timers_test: timers_test.exe
+	echo Running timers_test
+	$(OUT_DIR)\timers_test.exe
+
 transport_metadata_test.exe: grpc_test_util $(OUT_DIR)
 	echo Building transport_metadata_test
 	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ ..\..\test\core\transport\metadata_test.c 
diff --git a/vsprojects/vs2013/grpc.vcxproj b/vsprojects/vs2013/grpc.vcxproj
index cb87334eab67f63481b744b8ebe560ff1dfeb437..4c7f0fad2e2c5a673603d2068fe1c48e1895229e 100644
--- a/vsprojects/vs2013/grpc.vcxproj
+++ b/vsprojects/vs2013/grpc.vcxproj
@@ -150,6 +150,8 @@
     <ClInclude Include="..\..\src\core\json\json_common.h" />
     <ClInclude Include="..\..\src\core\json\json_reader.h" />
     <ClInclude Include="..\..\src\core\json\json_writer.h" />
+    <ClInclude Include="..\..\src\core\profiling\timers.h" />
+    <ClInclude Include="..\..\src\core\profiling\timers_preciseclock.h" />
     <ClInclude Include="..\..\src\core\statistics\census_interface.h" />
     <ClInclude Include="..\..\src\core\statistics\census_log.h" />
     <ClInclude Include="..\..\src\core\statistics\census_rpc_stats.h" />
@@ -338,6 +340,8 @@
     </ClCompile>
     <ClCompile Include="..\..\src\core\json\json_writer.c">
     </ClCompile>
+    <ClCompile Include="..\..\src\core\profiling\timers.c">
+    </ClCompile>
     <ClCompile Include="..\..\src\core\statistics\census_init.c">
     </ClCompile>
     <ClCompile Include="..\..\src\core\statistics\census_log.c">
diff --git a/vsprojects/vs2013/grpc.vcxproj.filters b/vsprojects/vs2013/grpc.vcxproj.filters
index a010639ad1333cf6b4acdf89176a65a731233cc3..7774a780402d9bb3ad608dcfd1ff42d90036287b 100644
--- a/vsprojects/vs2013/grpc.vcxproj.filters
+++ b/vsprojects/vs2013/grpc.vcxproj.filters
@@ -223,6 +223,9 @@
     <ClCompile Include="..\..\src\core\json\json_writer.c">
       <Filter>src\core\json</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\core\profiling\timers.c">
+      <Filter>src\core\profiling</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\core\statistics\census_init.c">
       <Filter>src\core\statistics</Filter>
     </ClCompile>
@@ -569,6 +572,12 @@
     <ClInclude Include="..\..\src\core\json\json_writer.h">
       <Filter>src\core\json</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\core\profiling\timers.h">
+      <Filter>src\core\profiling</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\src\core\profiling\timers_preciseclock.h">
+      <Filter>src\core\profiling</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\src\core\statistics\census_interface.h">
       <Filter>src\core\statistics</Filter>
     </ClInclude>
@@ -716,6 +725,9 @@
     <Filter Include="src\core\json">
       <UniqueIdentifier>{e665cc0e-b994-d7c5-cc18-2007392019f0}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\profiling">
+      <UniqueIdentifier>{87674b72-0f05-0469-481a-bd8c7af9ad80}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\security">
       <UniqueIdentifier>{1d850ac6-e639-4eab-5338-4ba40272fcc9}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vs2013/grpc_unsecure.vcxproj b/vsprojects/vs2013/grpc_unsecure.vcxproj
index 098ce340c1105b175bf80ce8e32ef30a0b9010e8..a31d82aa5fef4892ff2a2b422a9be3e08d78a185 100644
--- a/vsprojects/vs2013/grpc_unsecure.vcxproj
+++ b/vsprojects/vs2013/grpc_unsecure.vcxproj
@@ -134,6 +134,8 @@
     <ClInclude Include="..\..\src\core\json\json_common.h" />
     <ClInclude Include="..\..\src\core\json\json_reader.h" />
     <ClInclude Include="..\..\src\core\json\json_writer.h" />
+    <ClInclude Include="..\..\src\core\profiling\timers.h" />
+    <ClInclude Include="..\..\src\core\profiling\timers_preciseclock.h" />
     <ClInclude Include="..\..\src\core\statistics\census_interface.h" />
     <ClInclude Include="..\..\src\core\statistics\census_log.h" />
     <ClInclude Include="..\..\src\core\statistics\census_rpc_stats.h" />
@@ -282,6 +284,8 @@
     </ClCompile>
     <ClCompile Include="..\..\src\core\json\json_writer.c">
     </ClCompile>
+    <ClCompile Include="..\..\src\core\profiling\timers.c">
+    </ClCompile>
     <ClCompile Include="..\..\src\core\statistics\census_init.c">
     </ClCompile>
     <ClCompile Include="..\..\src\core\statistics\census_log.c">
diff --git a/vsprojects/vs2013/grpc_unsecure.vcxproj.filters b/vsprojects/vs2013/grpc_unsecure.vcxproj.filters
index 7757a44aecb92d5f5d2bfcbfecd39e809e6acb98..cec8f78bae629e75bd36e30ece7b844db58f8198 100644
--- a/vsprojects/vs2013/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vs2013/grpc_unsecure.vcxproj.filters
@@ -163,6 +163,9 @@
     <ClCompile Include="..\..\src\core\json\json_writer.c">
       <Filter>src\core\json</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\core\profiling\timers.c">
+      <Filter>src\core\profiling</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\core\statistics\census_init.c">
       <Filter>src\core\statistics</Filter>
     </ClCompile>
@@ -461,6 +464,12 @@
     <ClInclude Include="..\..\src\core\json\json_writer.h">
       <Filter>src\core\json</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\core\profiling\timers.h">
+      <Filter>src\core\profiling</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\src\core\profiling\timers_preciseclock.h">
+      <Filter>src\core\profiling</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\src\core\statistics\census_interface.h">
       <Filter>src\core\statistics</Filter>
     </ClInclude>
@@ -605,6 +614,9 @@
     <Filter Include="src\core\json">
       <UniqueIdentifier>{443ffc61-1bea-2477-6e54-1ddf8c139264}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\profiling">
+      <UniqueIdentifier>{7f91d9bf-c9de-835a-d74d-b16f843b89a9}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\statistics">
       <UniqueIdentifier>{e084164c-a069-00e3-db35-4e0b1cd6f0b7}</UniqueIdentifier>
     </Filter>