[PATCH] perf stat: Zero ena and run for interval mode

Jin Yao
2020-04-09T07:10:07Z

As the code comments in perf_stat_process_counter() say,
we calculate counter's data every interval, and the display
code shows ps->res_stats avg value. We need to zero the stats
for interval mode.

But the current code only zeros the res_stats[0], it doesn't
zero the res_stats[1] and res_stats[2], which are for ena
and run of counter.

This patch zeros the whole res_stats[] for interval mode.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
tools/perf/util/stat.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index 5f26137b8d60..242476eb808c 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -368,8 +368,10 @@ int perf_stat_process_counter(struct perf_stat_config *config,
* interval mode, otherwise overall avg running
* averages will be shown for each interval.
*/
- if (config->interval)
- init_stats(ps->res_stats);
+ if (config->interval) {
+ for (i = 0; i < 3; i++)
+ init_stats(&ps->res_stats[i]);
+ }

if (counter->per_pkg)
zero_per_pkg(counter);
--
2.17.1