From c914c4a71ac55f9fb7eb0bd86b39b27ad7ed6fbf Mon Sep 17 00:00:00 2001
From: Vijay Pai <vpai@google.com>
Date: Mon, 13 Apr 2015 07:00:07 -0700
Subject: [PATCH] Infrastructure for timer insertion, logging, and testing.

---
 BUILD                              |   4 +
 Makefile                           |  41 +++++++-
 build.json                         |  16 +++
 src/core/statistics/timers.c       | 162 +++++++++++++++++++++++++++++
 src/core/statistics/timers.h       |  63 +++++++++++
 src/core/surface/init.c            |   7 +-
 test/core/statistics/timers_test.c |  83 +++++++++++++++
 7 files changed, 373 insertions(+), 3 deletions(-)
 create mode 100644 src/core/statistics/timers.c
 create mode 100644 src/core/statistics/timers.h
 create mode 100644 test/core/statistics/timers_test.c

diff --git a/BUILD b/BUILD
index ccff9c05c6..9a280db7c5 100644
--- a/BUILD
+++ b/BUILD
@@ -186,6 +186,7 @@ cc_library(
         "src/core/statistics/census_rpc_stats.h",
         "src/core/statistics/census_tracing.h",
         "src/core/statistics/hash_table.h",
+        "src/core/statistics/timers.h",
         "src/core/statistics/window_stats.h",
         "src/core/surface/byte_buffer_queue.h",
         "src/core/surface/call.h",
@@ -297,6 +298,7 @@ cc_library(
         "src/core/statistics/census_rpc_stats.c",
         "src/core/statistics/census_tracing.c",
         "src/core/statistics/hash_table.c",
+        "src/core/statistics/timers.c",
         "src/core/statistics/window_stats.c",
         "src/core/surface/byte_buffer.c",
         "src/core/surface/byte_buffer_queue.c",
@@ -414,6 +416,7 @@ cc_library(
         "src/core/statistics/census_rpc_stats.h",
         "src/core/statistics/census_tracing.h",
         "src/core/statistics/hash_table.h",
+        "src/core/statistics/timers.h",
         "src/core/statistics/window_stats.h",
         "src/core/surface/byte_buffer_queue.h",
         "src/core/surface/call.h",
@@ -505,6 +508,7 @@ cc_library(
         "src/core/statistics/census_rpc_stats.c",
         "src/core/statistics/census_tracing.c",
         "src/core/statistics/hash_table.c",
+        "src/core/statistics/timers.c",
         "src/core/statistics/window_stats.c",
         "src/core/surface/byte_buffer.c",
         "src/core/surface/byte_buffer_queue.c",
diff --git a/Makefile b/Makefile
index 8e01bb88dc..b0edd762c4 100644
--- a/Makefile
+++ b/Makefile
@@ -620,6 +620,7 @@ 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
@@ -1079,7 +1080,7 @@ 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_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 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$(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_no_op_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_worker $(BINDIR)/$(CONFIG)/status_test $(BINDIR)/$(CONFIG)/thread_pool_test
 
@@ -1216,6 +1217,8 @@ 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"
@@ -2564,6 +2567,7 @@ LIBGRPC_SRC = \
     src/core/statistics/census_rpc_stats.c \
     src/core/statistics/census_tracing.c \
     src/core/statistics/hash_table.c \
+    src/core/statistics/timers.c \
     src/core/statistics/window_stats.c \
     src/core/surface/byte_buffer.c \
     src/core/surface/byte_buffer_queue.c \
@@ -2711,6 +2715,7 @@ src/core/statistics/census_log.c: $(OPENSSL_DEP)
 src/core/statistics/census_rpc_stats.c: $(OPENSSL_DEP)
 src/core/statistics/census_tracing.c: $(OPENSSL_DEP)
 src/core/statistics/hash_table.c: $(OPENSSL_DEP)
+src/core/statistics/timers.c: $(OPENSSL_DEP)
 src/core/statistics/window_stats.c: $(OPENSSL_DEP)
 src/core/surface/byte_buffer.c: $(OPENSSL_DEP)
 src/core/surface/byte_buffer_queue.c: $(OPENSSL_DEP)
@@ -2874,6 +2879,7 @@ $(OBJDIR)/$(CONFIG)/src/core/statistics/census_log.o:
 $(OBJDIR)/$(CONFIG)/src/core/statistics/census_rpc_stats.o: 
 $(OBJDIR)/$(CONFIG)/src/core/statistics/census_tracing.o: 
 $(OBJDIR)/$(CONFIG)/src/core/statistics/hash_table.o: 
+$(OBJDIR)/$(CONFIG)/src/core/statistics/timers.o: 
 $(OBJDIR)/$(CONFIG)/src/core/statistics/window_stats.o: 
 $(OBJDIR)/$(CONFIG)/src/core/surface/byte_buffer.o: 
 $(OBJDIR)/$(CONFIG)/src/core/surface/byte_buffer_queue.o: 
@@ -3050,6 +3056,7 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/statistics/census_rpc_stats.c \
     src/core/statistics/census_tracing.c \
     src/core/statistics/hash_table.c \
+    src/core/statistics/timers.c \
     src/core/statistics/window_stats.c \
     src/core/surface/byte_buffer.c \
     src/core/surface/byte_buffer_queue.c \
@@ -3190,6 +3197,7 @@ $(OBJDIR)/$(CONFIG)/src/core/statistics/census_log.o:
 $(OBJDIR)/$(CONFIG)/src/core/statistics/census_rpc_stats.o: 
 $(OBJDIR)/$(CONFIG)/src/core/statistics/census_tracing.o: 
 $(OBJDIR)/$(CONFIG)/src/core/statistics/hash_table.o: 
+$(OBJDIR)/$(CONFIG)/src/core/statistics/timers.o: 
 $(OBJDIR)/$(CONFIG)/src/core/statistics/window_stats.o: 
 $(OBJDIR)/$(CONFIG)/src/core/surface/byte_buffer.o: 
 $(OBJDIR)/$(CONFIG)/src/core/surface/byte_buffer_queue.o: 
@@ -7907,6 +7915,37 @@ endif
 endif
 
 
+TIMERS_TEST_SRC = \
+    test/core/statistics/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/statistics/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 f8f23e0d33..4e1e9a7f8d 100644
--- a/build.json
+++ b/build.json
@@ -136,6 +136,7 @@
         "src/core/statistics/census_rpc_stats.h",
         "src/core/statistics/census_tracing.h",
         "src/core/statistics/hash_table.h",
+        "src/core/statistics/timers.h",
         "src/core/statistics/window_stats.h",
         "src/core/surface/byte_buffer_queue.h",
         "src/core/surface/call.h",
@@ -228,6 +229,7 @@
         "src/core/statistics/census_rpc_stats.c",
         "src/core/statistics/census_tracing.c",
         "src/core/statistics/hash_table.c",
+        "src/core/statistics/timers.c",
         "src/core/statistics/window_stats.c",
         "src/core/surface/byte_buffer.c",
         "src/core/surface/byte_buffer_queue.c",
@@ -1658,6 +1660,20 @@
         "gpr"
       ]
     },
+    {
+      "name": "timers_test",
+      "build": "test",
+      "language": "c",
+      "src": [
+        "test/core/statistics/timers_test.c"
+      ],
+      "deps": [
+        "grpc_test_util",
+        "grpc",
+        "gpr_test_util",
+        "gpr"
+      ]
+    },
     {
       "name": "transport_metadata_test",
       "build": "test",
diff --git a/src/core/statistics/timers.c b/src/core/statistics/timers.c
new file mode 100644
index 0000000000..185e462c83
--- /dev/null
+++ b/src/core/statistics/timers.c
@@ -0,0 +1,162 @@
+/*
+ *
+ * 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 "timers.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 {
+#ifdef GRPC_TIMERS_RDTSC
+#error Rdtsc timers not supported yet
+  /* TODO(vpai): Fill in rdtsc support if desired */
+#else
+  gpr_timespec timer_;
+#endif
+  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_;
+  const char *fmt_;
+};
+
+grpc_timers_log* grpc_timers_log_global = NULL;
+
+static int timer_now(grpc_timer_entry *tm) {
+#ifdef GRPC_TIMERS_RDTSC
+#error Rdtsc not supported yet
+#else
+  tm->timer_ = gpr_now();
+  return(1);
+#endif
+}
+
+grpc_timers_log* grpc_timers_log_create(int capacity_limit, FILE *dump,
+                                        const char *fmt) {
+  grpc_timers_log* log = gpr_malloc(sizeof(*log));
+  GPR_ASSERT(log);
+
+  /* TODO (vpai): Allow allocation below limit */
+  log->log_ = gpr_malloc(capacity_limit*sizeof(*log->log_));
+  GPR_ASSERT(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;
+  log->fmt_ = fmt;
+
+  return log;
+}
+
+static void log_report_locked(grpc_timers_log *log) {
+  FILE *fp = log->fp_;
+  const char *fmt = log->fmt_;
+  int i;
+  for (i=0;i<log->num_entries_;i++) {
+    grpc_timer_entry* entry = &(log->log_[i]);
+    fprintf(fp, fmt,
+#ifdef GRPC_TIMERS_RDTSC
+#error Rdtsc not supported
+#else
+            entry->timer_.tv_sec, entry->timer_.tv_nsec,
+#endif
+            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_++];
+
+  timer_now(entry);
+  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,
+#ifdef GRPC_TIMERS_RDTSC
+#error Rdtsc not supported
+#else
+                            "TIMER %1$ld.%2$09d %3$s seq %4$d @ %5$s:%6$d\n"
+#endif
+                            );
+  /* Use positional arguments as an example for others to change fmt */
+}
+
+void grpc_timers_log_global_destroy(void) {
+  grpc_timers_log_destroy(grpc_timers_log_global);
+}
diff --git a/src/core/statistics/timers.h b/src/core/statistics/timers.h
new file mode 100644
index 0000000000..3303138b40
--- /dev/null
+++ b/src/core/statistics/timers.h
@@ -0,0 +1,63 @@
+/*
+ *
+ * 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_TIMERS_H
+#define GRPC_TIMERS_H
+
+#include <stdio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct grpc_timers_log grpc_timers_log;
+
+void grpc_timers_log_global_init(void);
+void grpc_timers_log_global_destroy(void);
+grpc_timers_log* grpc_timers_log_create(int capacity_limit, FILE *dump,
+                                        const char *fmt);
+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__);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_TIMERS_H */
diff --git a/src/core/surface/init.c b/src/core/surface/init.c
index d4f0eb40e8..5d0eaadf1c 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/statistics/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/test/core/statistics/timers_test.c b/test/core/statistics/timers_test.c
new file mode 100644
index 0000000000..efd90ed728
--- /dev/null
+++ b/test/core/statistics/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/statistics/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;
+}
-- 
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