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

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Date:   Mon, 20 Apr 2020 22:59:17 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Jiri Olsa <jolsa@...hat.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

Hi Jiri,

On 4/20/2020 5:19 PM, Jiri Olsa wrote:
> 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
>

Yes, I can use the existing function to reset rt_stat, I don't need to 
define a new one.

Posted v2 yet.

Thanks
Jin Yao

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