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Subject[PATCH 3/7] perf lock: Skip print_bad_events() if nothing bad
Date
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>
---
tools/perf/builtin-lock.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 118a036a81fb..2337b09dd2cd 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -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);
--
2.36.1.255.ge46751e96f-goog
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