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perf lock: Skip print_bad_events() if nothing bad

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The debug output is meaningful when there are bad lock sequences.
Skip it unless there's one or -v option is given.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20220615163222.1275500-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2022-06-15 09:32:18 -07:00 committed by Arnaldo Carvalho de Melo
parent 309e133dfe
commit 9565c9186d
1 changed files with 7 additions and 0 deletions
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7
tools/perf/builtin-lock.c
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@ -858,9 +858,16 @@ static void print_bad_events(int bad, int total)
{
/* Output for debug, this have to be removed */
int i;
int broken = 0;
const char *name[4] =
{ "acquire", "acquired", "contended", "release" };
for (i = 0; i < BROKEN_MAX; i++)
broken += bad_hist[i];
if (broken == 0 && !verbose)
return;
pr_info("\n=== output for debug===\n\n");
pr_info("bad: %d, total: %d\n", bad, total);
pr_info("bad rate: %.2f %%\n", (double)bad / (double)total * 100);