linux-kernel - Re: [PATCH] perf stat: Improve runtime stat for interval mode

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Date:   Mon, 20 Apr 2020 11:19:06 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Jin Yao <yao.jin@...ux.intel.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH] perf stat: Improve runtime stat for interval mode

On Fri, Apr 17, 2020 at 08:51:54AM +0800, Jin Yao wrote:

SNIP

> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index ec053dc1e35c..d5c326ff46d0 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -359,6 +359,7 @@ static void process_interval(void)
>  	clock_gettime(CLOCK_MONOTONIC, &ts);
>  	diff_timespec(&rs, &ts, &ref_time);
>  
> +	perf_stat__reset_rt_stat();

could you use just existing:

	perf_stat__reset_shadow_per_stat(&rt_stat)

or perhaps event perf_stat__reset_shadow_stats, given
that we init walltime_nsecs_stats just few lines below

jirka

>  	read_counters(&rs);
>  
>  	if (STAT_RECORD) {

SNIP