linux-kernel - Re: [PATCH] perf report: Add 'tgid' sort key

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Message-ID: <CAP-5=fUcjEONLZ5uTHMDep3xF2b7ZB7Krd1dEViUSYfuWT-G0w@mail.gmail.com>
Date: Tue, 11 Feb 2025 14:43:05 -0800
From: Ian Rogers <irogers@...gle.com>
To: Namhyung Kim <namhyung@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>, Kan Liang <kan.liang@...ux.intel.com>, 
	Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>, 
	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, 
	LKML <linux-kernel@...r.kernel.org>, linux-perf-users@...r.kernel.org, 
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH] perf report: Add 'tgid' sort key

On Wed, Feb 5, 2025 at 4:01 PM Namhyung Kim <namhyung@...nel.org> wrote:
>
> Sometimes we need to analyze the data in process level but current sort
> keys only work on thread level.  Let's add 'tgid' sort key for that as
> 'pid' is already taken for thread.
>
> This will look mostly the same, but it only uses tgid instead of tid.
> Here's an example of a process with two threads (thloop).
>
>   $ perf record -- perf test -w thloop
>
>   $ perf report --stdio -s tgid,pid -H
>   ...
>   #
>   #    Overhead  Tgid:Command / Pid:Command
>   # ...........  ..........................
>   #
>      100.00%     2018407:perf
>          50.34%     2018407:perf
>          49.66%     2018409:perf
>
> Suggested-by: Stephane Eranian <eranian@...gle.com>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>

Reviewed-by: Ian Rogers <irogers@...gle.com>

Thanks,
Ian