As mentioned in the subthread starting at [1], trace2 counters should be used to count events instead of ad-hoc static variables. Convert the static variables that count fsync calls to trace2 counters, reducing the coupling between wrapper.c and the trace2 subsystem. The counters are not per-thread because the ones being replaced also were not. [1] https://lore.kernel.org/git/20230627195251.1973421-2-calvinwan@xxxxxxxxxx/ Signed-off-by: Beat Bolli <dev+git@xxxxxxxxx> --- I have based this series on master, so this patch will create a trivial merge conflict with c489f47a649d (refs/packed-backend.c: add trace2 counters for jump list, 2023-07-10) on next, which also adds a new counter. trace2.c | 1 - trace2.h | 4 ++++ trace2/tr2_ctr.c | 10 ++++++++++ wrapper.c | 19 ++----------------- wrapper.h | 5 ----- 5 files changed, 16 insertions(+), 23 deletions(-) diff --git a/trace2.c b/trace2.c index 49c23bfd05a7..6dc74dff4c73 100644 --- a/trace2.c +++ b/trace2.c @@ -276,7 +276,6 @@ void trace2_cmd_exit_fl(const char *file, int line, int code) if (!trace2_enabled) return; - trace_git_fsync_stats(); trace2_collect_process_info(TRACE2_PROCESS_INFO_EXIT); tr2main_exit_code = code; diff --git a/trace2.h b/trace2.h index 64c747c1df1b..12211d3bd61b 100644 --- a/trace2.h +++ b/trace2.h @@ -552,6 +552,10 @@ enum trace2_counter_id { TRACE2_COUNTER_ID_TEST1 = 0, /* emits summary event only */ TRACE2_COUNTER_ID_TEST2, /* emits summary and thread events */ + /* counts number of fsyncs */ + TRACE2_COUNTER_ID_FSYNC_WRITEOUT_ONLY, + TRACE2_COUNTER_ID_FSYNC_HARDWARE_FLUSH, + /* Add additional counter definitions before here. */ TRACE2_NUMBER_OF_COUNTERS }; diff --git a/trace2/tr2_ctr.c b/trace2/tr2_ctr.c index b342d3b1a3c0..14a082651001 100644 --- a/trace2/tr2_ctr.c +++ b/trace2/tr2_ctr.c @@ -27,6 +27,16 @@ static struct tr2_counter_metadata tr2_counter_metadata[TRACE2_NUMBER_OF_COUNTER .name = "test2", .want_per_thread_events = 1, }, + [TRACE2_COUNTER_ID_FSYNC_WRITEOUT_ONLY] = { + .category = "fsync", + .name = "writeout_only", + .want_per_thread_events = 0, + }, + [TRACE2_COUNTER_ID_FSYNC_HARDWARE_FLUSH] = { + .category = "fsync", + .name = "hardware_flush", + .want_per_thread_events = 0, + }, /* Add additional metadata before here. */ }; diff --git a/wrapper.c b/wrapper.c index 22be9812a724..dea54a326073 100644 --- a/wrapper.c +++ b/wrapper.c @@ -10,9 +10,6 @@ #include "strbuf.h" #include "trace2.h" -static intmax_t count_fsync_writeout_only; -static intmax_t count_fsync_hardware_flush; - #ifdef HAVE_RTLGENRANDOM /* This is required to get access to RtlGenRandom. */ #define SystemFunction036 NTAPI SystemFunction036 @@ -551,7 +548,7 @@ int git_fsync(int fd, enum fsync_action action) { switch (action) { case FSYNC_WRITEOUT_ONLY: - count_fsync_writeout_only += 1; + trace2_counter_add(TRACE2_COUNTER_ID_FSYNC_WRITEOUT_ONLY, 1); #ifdef __APPLE__ /* @@ -583,7 +580,7 @@ int git_fsync(int fd, enum fsync_action action) return -1; case FSYNC_HARDWARE_FLUSH: - count_fsync_hardware_flush += 1; + trace2_counter_add(TRACE2_COUNTER_ID_FSYNC_HARDWARE_FLUSH, 1); /* * On macOS, a special fcntl is required to really flush the @@ -600,18 +597,6 @@ int git_fsync(int fd, enum fsync_action action) } } -static void log_trace_fsync_if(const char *key, intmax_t value) -{ - if (value) - trace2_data_intmax("fsync", the_repository, key, value); -} - -void trace_git_fsync_stats(void) -{ - log_trace_fsync_if("fsync/writeout-only", count_fsync_writeout_only); - log_trace_fsync_if("fsync/hardware-flush", count_fsync_hardware_flush); -} - static int warn_if_unremovable(const char *op, const char *file, int rc) { int err; diff --git a/wrapper.h b/wrapper.h index c85b1328d163..79a9c1b5077b 100644 --- a/wrapper.h +++ b/wrapper.h @@ -87,11 +87,6 @@ enum fsync_action { */ int git_fsync(int fd, enum fsync_action action); -/* - * Writes out trace statistics for fsync using the trace2 API. - */ -void trace_git_fsync_stats(void); - /* * Preserves errno, prints a message, but gives no warning for ENOENT. * Returns 0 on success, which includes trying to unlink an object that does -- 2.41.0
