linux-kernel - Re: [PATCH 2/2] perf lock: Add -t/--thread option for report

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Date:   Tue, 24 May 2022 10:31:21 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...nel.org>, Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ian Rogers <irogers@...gle.com>,
        linux-perf-users <linux-perf-users@...r.kernel.org>
Subject: Re: [PATCH 2/2] perf lock: Add -t/--thread option for report

Hi Arnaldo,

On Mon, May 23, 2022 at 5:50 AM Arnaldo Carvalho de Melo
<acme@...nel.org> wrote:
> Applied both and added this:
>
> ⬢[acme@...lbox perf]$ git diff
> diff --git a/tools/perf/Documentation/perf-lock.txt b/tools/perf/Documentation/perf-lock.txt
> index b43222229807672c..656b537b2fba078f 100644
> --- a/tools/perf/Documentation/perf-lock.txt
> +++ b/tools/perf/Documentation/perf-lock.txt
> @@ -64,6 +64,27 @@ REPORT OPTIONS
>  --combine-locks::
>         Merge lock instances in the same class (based on name).
>
> +-t::
> +--threads::
> +    The -t option is to show per-thread lock stat like below:
> +
> +      $ perf lock report -t -F acquired,contended,avg_wait
> +
> +                    Name   acquired  contended   avg wait (ns)
> +
> +                    perf     240569          9            5784
> +                 swapper     106610         19             543
> +                  :15789      17370          2           14538
> +            ContainerMgr       8981          6             874
> +                   sleep       5275          1           11281
> +         ContainerThread       4416          4             944
> +         RootPressureThr       3215          5            1215
> +             rcu_preempt       2954          0               0
> +            ContainerMgr       2560          0               0
> +                 unnamed       1873          0               0
> +         EventManager_De       1845          1             636
> +         futex-default-S       1609          0               0
> +
>  INFO OPTIONS
>  ------------

Thanks a lot for doing this!
Namhyung