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Date:   Sat, 2 May 2020 10:18:02 +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 0/2] perf stat: Support overall statistics for interval
 mode



On 5/1/2020 7:36 PM, Jiri Olsa wrote:
> On Thu, Apr 30, 2020 at 11:07:38AM +0800, Jin Yao wrote:
>> Currently perf-stat supports to print counts at regular interval (-I),
>> but it's not very easy for user to get the overall statistics.
>>
>> With this patchset, it supports to report the summary at the end of
>> interval output.
>>
>> For example,
>>
>>   root@...-ppc:~# perf stat -e cycles -I1000 --interval-count 2
>>   #           time             counts unit events
>>        1.000412064          2,281,114      cycles
>>        2.001383658          2,547,880      cycles
>>
>>    Performance counter stats for 'system wide':
>>
>>            4,828,994      cycles
>>
>>          2.002860349 seconds time elapsed
>>
>>   root@...-ppc:~# perf stat -e cycles,instructions -I1000 --interval-count 2
>>   #           time             counts unit events
>>        1.000389902          1,536,093      cycles
>>        1.000389902            420,226      instructions              #    0.27  insn per cycle
>>        2.001433453          2,213,952      cycles
>>        2.001433453            735,465      instructions              #    0.33  insn per cycle
>>
>>    Performance counter stats for 'system wide':
>>
>>            3,750,045      cycles
>>            1,155,691      instructions              #    0.31  insn per cycle
>>
>>          2.003023361 seconds time elapsed
>>
>>   root@...-ppc:~# perf stat -M CPI,IPC -I1000 --interval-count 2
>>   #           time             counts unit events
>>        1.000435121            905,303      inst_retired.any          #      2.9 CPI
>>        1.000435121          2,663,333      cycles
>>        1.000435121            914,702      inst_retired.any          #      0.3 IPC
>>        1.000435121          2,676,559      cpu_clk_unhalted.thread
>>        2.001615941          1,951,092      inst_retired.any          #      1.8 CPI
>>        2.001615941          3,551,357      cycles
>>        2.001615941          1,950,837      inst_retired.any          #      0.5 IPC
>>        2.001615941          3,551,044      cpu_clk_unhalted.thread
>>
>>    Performance counter stats for 'system wide':
>>
>>            2,856,395      inst_retired.any          #      2.2 CPI
>>            6,214,690      cycles
>>            2,865,539      inst_retired.any          #      0.5 IPC
>>            6,227,603      cpu_clk_unhalted.thread
>>
>>          2.003403078 seconds time elapsed
>>
>> Jin Yao (2):
>>    perf evsel: Create counts for collecting summary data
>>    perf stat: Report summary for interval mode
> 
> good idea, but I can't apply this on latest Arnaldo's perf/core,
> could you please rebase?
> 
> thanks,
> jirka
> 

Oh, yes, it couldn't be applied on perf/core. I've rebased it.

Thanks
Jin Yao

>>
>>   tools/perf/builtin-stat.c | 14 ++++++-
>>   tools/perf/util/evsel.c   | 10 ++++-
>>   tools/perf/util/evsel.h   |  1 +
>>   tools/perf/util/stat.c    | 77 +++++++++++++++++++++++++++++++++++++++
>>   tools/perf/util/stat.h    |  5 +++
>>   5 files changed, 103 insertions(+), 4 deletions(-)
>>
>> -- 
>> 2.17.1
>>
> 

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