linux-kernel - Re: [PATCH v2] perf cgroup: simplify arguments if track multiple events for a cgroup

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Message-ID: <CAA70yB5TB3mxL1uN-sXvUsf578k+_GWkq1gHgF_HRa_1p770gw@mail.gmail.com>
Date:   Thu, 22 Feb 2018 18:34:08 +0800
From:   Weiping Zhang <zwp10758@...il.com>
To:     acme@...hat.com
Cc:     Jiri Olsa <jolsa@...hat.com>, peterz@...radead.org,
        mingo@...hat.com, acme@...nel.org,
        alexander.shishkin@...ux.intel.com, namhyung@...nel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-perf-users@...r.kernel.org
Subject: Re: [PATCH v2] perf cgroup: simplify arguments if track multiple
 events for a cgroup

2018-01-31 17:22 GMT+08:00 Jiri Olsa <jolsa@...hat.com>:
> On Mon, Jan 29, 2018 at 11:48:09PM +0800, weiping zhang wrote:
>> if use -G with one cgroup and -e with multiple events, only the first
>> event has correct cgroup setting, all events from the second will track
>> system-wide events.
>>
>> if user want track multiple events for a specific cgroup, user must give
>> parameters like follow:
>> $ perf stat -e e1 -e e2 -e e3 -G test,test,test
>> this patch simplify this case, just type one cgroup, like following:
>> $ perf stat -e e1 -e e2 -e e3 -G test
>>
>> $ mkdir -p /sys/fs/cgroup/perf_event/test
>> $ perf stat -e cycles -e cache-misses  -a -I 1000 -G test
>>
>> before:
>>      1.001007226      <not counted>      cycles                    test
>>      1.001007226              7,506      cache-misses
>>
>> after:
>>      1.000834097      <not counted>      cycles                    test
>>      1.000834097      <not counted>      cache-misses              test
>>
>> Signed-off-by: weiping zhang <zhangweiping@...ichuxing.com>
>
> Acked-by: Jiri Olsa <jolsa@...nel.org>

Hi Arnaldo,

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