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-rw-r--r--src/core/ext/transport/chttp2/transport/chttp2_transport.c1
-rw-r--r--src/core/lib/debug/stats_data.c2
-rw-r--r--src/core/lib/debug/stats_data.h4
-rw-r--r--src/core/lib/debug/stats_data.yaml2
-rw-r--r--src/core/lib/debug/stats_data_bq_schema.sql1
-rw-r--r--tools/run_tests/performance/massage_qps_stats.py1
-rw-r--r--tools/run_tests/performance/scenario_result_schema.json10
7 files changed, 21 insertions, 0 deletions
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index ecd4322b43..d186051291 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -1027,6 +1027,7 @@ static void write_action_begin_locked(grpc_exec_ctx *exec_ctx, void *gt,
write_action, t, scheduler),
GRPC_ERROR_NONE);
} else {
+ GRPC_STATS_INC_HTTP2_SPURIOUS_WRITES_BEGUN(exec_ctx);
set_write_state(exec_ctx, t, GRPC_CHTTP2_WRITE_STATE_IDLE,
"begin writing nothing");
GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "writing");
diff --git a/src/core/lib/debug/stats_data.c b/src/core/lib/debug/stats_data.c
index b3e1ee9b4e..173e075db3 100644
--- a/src/core/lib/debug/stats_data.c
+++ b/src/core/lib/debug/stats_data.c
@@ -71,6 +71,7 @@ const char *grpc_stats_counter_name[GRPC_STATS_COUNTER_COUNT] = {
"http2_initiate_write_due_to_transport_flow_control_unstalled",
"http2_initiate_write_due_to_ping_response",
"http2_initiate_write_due_to_force_rst_stream",
+ "http2_spurious_writes_begun",
"combiner_locks_initiated",
"combiner_locks_scheduled_items",
"combiner_locks_scheduled_final_items",
@@ -137,6 +138,7 @@ const char *grpc_stats_counter_doc[GRPC_STATS_COUNTER_COUNT] = {
"'transport_flow_control_unstalled'",
"Number of HTTP2 writes initiated due to 'ping_response'",
"Number of HTTP2 writes initiated due to 'force_rst_stream'",
+ "Number of HTTP2 writes initiated with nothing to write",
"Number of combiner lock entries by process (first items queued to a "
"combiner)",
"Number of items scheduled against combiner locks",
diff --git a/src/core/lib/debug/stats_data.h b/src/core/lib/debug/stats_data.h
index c9871c4a56..235a93ba39 100644
--- a/src/core/lib/debug/stats_data.h
+++ b/src/core/lib/debug/stats_data.h
@@ -73,6 +73,7 @@ typedef enum {
GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED,
GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE,
GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM,
+ GRPC_STATS_COUNTER_HTTP2_SPURIOUS_WRITES_BEGUN,
GRPC_STATS_COUNTER_COMBINER_LOCKS_INITIATED,
GRPC_STATS_COUNTER_COMBINER_LOCKS_SCHEDULED_ITEMS,
GRPC_STATS_COUNTER_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS,
@@ -279,6 +280,9 @@ typedef enum {
GRPC_STATS_INC_COUNTER( \
(exec_ctx), \
GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM)
+#define GRPC_STATS_INC_HTTP2_SPURIOUS_WRITES_BEGUN(exec_ctx) \
+ GRPC_STATS_INC_COUNTER((exec_ctx), \
+ GRPC_STATS_COUNTER_HTTP2_SPURIOUS_WRITES_BEGUN)
#define GRPC_STATS_INC_COMBINER_LOCKS_INITIATED(exec_ctx) \
GRPC_STATS_INC_COUNTER((exec_ctx), \
GRPC_STATS_COUNTER_COMBINER_LOCKS_INITIATED)
diff --git a/src/core/lib/debug/stats_data.yaml b/src/core/lib/debug/stats_data.yaml
index 84727fe6c4..fc6ca860bc 100644
--- a/src/core/lib/debug/stats_data.yaml
+++ b/src/core/lib/debug/stats_data.yaml
@@ -159,6 +159,8 @@
doc: Number of HTTP2 writes initiated due to 'ping_response'
- counter: http2_initiate_write_due_to_force_rst_stream
doc: Number of HTTP2 writes initiated due to 'force_rst_stream'
+- counter: http2_spurious_writes_begun
+ doc: Number of HTTP2 writes initiated with nothing to write
# combiner locks
- counter: combiner_locks_initiated
doc: Number of combiner lock entries by process
diff --git a/src/core/lib/debug/stats_data_bq_schema.sql b/src/core/lib/debug/stats_data_bq_schema.sql
index d21afbbfe4..1680425eb6 100644
--- a/src/core/lib/debug/stats_data_bq_schema.sql
+++ b/src/core/lib/debug/stats_data_bq_schema.sql
@@ -46,6 +46,7 @@ http2_initiate_write_due_to_keepalive_ping_per_iteration:FLOAT,
http2_initiate_write_due_to_transport_flow_control_unstalled_per_iteration:FLOAT,
http2_initiate_write_due_to_ping_response_per_iteration:FLOAT,
http2_initiate_write_due_to_force_rst_stream_per_iteration:FLOAT,
+http2_spurious_writes_begun_per_iteration:FLOAT,
combiner_locks_initiated_per_iteration:FLOAT,
combiner_locks_scheduled_items_per_iteration:FLOAT,
combiner_locks_scheduled_final_items_per_iteration:FLOAT,
diff --git a/tools/run_tests/performance/massage_qps_stats.py b/tools/run_tests/performance/massage_qps_stats.py
index 7994b544ac..4d4c494405 100644
--- a/tools/run_tests/performance/massage_qps_stats.py
+++ b/tools/run_tests/performance/massage_qps_stats.py
@@ -68,6 +68,7 @@ def massage_qps_stats(scenario_result):
stats["core_http2_initiate_write_due_to_transport_flow_control_unstalled"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_transport_flow_control_unstalled")
stats["core_http2_initiate_write_due_to_ping_response"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_ping_response")
stats["core_http2_initiate_write_due_to_force_rst_stream"] = massage_qps_stats_helpers.counter(core_stats, "http2_initiate_write_due_to_force_rst_stream")
+ stats["core_http2_spurious_writes_begun"] = massage_qps_stats_helpers.counter(core_stats, "http2_spurious_writes_begun")
stats["core_combiner_locks_initiated"] = massage_qps_stats_helpers.counter(core_stats, "combiner_locks_initiated")
stats["core_combiner_locks_scheduled_items"] = massage_qps_stats_helpers.counter(core_stats, "combiner_locks_scheduled_items")
stats["core_combiner_locks_scheduled_final_items"] = massage_qps_stats_helpers.counter(core_stats, "combiner_locks_scheduled_final_items")
diff --git a/tools/run_tests/performance/scenario_result_schema.json b/tools/run_tests/performance/scenario_result_schema.json
index 12a56dbec0..725b3a7056 100644
--- a/tools/run_tests/performance/scenario_result_schema.json
+++ b/tools/run_tests/performance/scenario_result_schema.json
@@ -352,6 +352,11 @@
},
{
"mode": "NULLABLE",
+ "name": "core_http2_spurious_writes_begun",
+ "type": "INTEGER"
+ },
+ {
+ "mode": "NULLABLE",
"name": "core_combiner_locks_initiated",
"type": "INTEGER"
},
@@ -954,6 +959,11 @@
},
{
"mode": "NULLABLE",
+ "name": "core_http2_spurious_writes_begun",
+ "type": "INTEGER"
+ },
+ {
+ "mode": "NULLABLE",
"name": "core_combiner_locks_initiated",
"type": "INTEGER"
},