linux-kernel - Re: [PATCH v8 0/4] Tracing contention lock owner call stack

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Message-Id: <174078149997.322575.17228936303109215.b4-ty@kernel.org>
Date: Fri, 28 Feb 2025 14:24:59 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: linux-kernel@...r.kernel.org, Chun-Tse Shao <ctshao@...gle.com>
Cc: peterz@...radead.org, mingo@...hat.com, acme@...nel.org, 
 mark.rutland@....com, alexander.shishkin@...ux.intel.com, jolsa@...nel.org, 
 irogers@...gle.com, adrian.hunter@...el.com, kan.liang@...ux.intel.com, 
 nick.forrington@....com, linux-perf-users@...r.kernel.org, 
 bpf@...r.kernel.org
Subject: Re: [PATCH v8 0/4] Tracing contention lock owner call stack

On Wed, 26 Feb 2025 16:28:52 -0800, Chun-Tse Shao wrote:
> For perf lock contention, the current owner tracking (-o option) only
> works with per-thread mode (-t option). Enabling call stack mode for
> owner can be useful for diagnosing why a system running slow in
> lock contention.
> 
> Example output:
>   $ sudo ~/linux/tools/perf/perf lock con -abvo -Y mutex -E16 perf bench sched pipe
>    ...
>    contended   total wait     max wait     avg wait         type   caller
> 
> [...]
Applied to perf-tools-next, thanks!

Best regards,
Namhyung