trace2: add stats for fsync operations

Add some global trace2 statistics for the number of fsyncs performed
during the lifetime of a Git process.

These stats are printed as part of trace2_cmd_exit_fl, which is
presumably where we might want to print any other cross-cutting
statistics.

Signed-off-by: Neeraj Singh <neerajsi@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/trace2.c b/trace2.c
index 179caa72cf..e01cf77f1a 100644
--- a/trace2.c
+++ b/trace2.c
@@ -214,6 +214,7 @@ int trace2_cmd_exit_fl(const char *file, int line, int code)
 	if (!trace2_enabled)
 		return code;
 
+	trace_git_fsync_stats();
 	trace2_collect_process_info(TRACE2_PROCESS_INFO_EXIT);
 
 	tr2main_exit_code = code;