linux-kernel - Re: [PATCH v3] perf evsel: Refactor tool events

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Date: Tue, 11 Jun 2024 08:51:00 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: weilin.wang@...el.com,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Kan Liang <kan.liang@...ux.intel.com>,
	Ze Gao <zegao2021@...il.com>,
	Leo Yan <leo.yan@...ux.dev>,
	Ravi Bangoria <ravi.bangoria@....com>,
	Dmitrii Dolgov <9erthalion6@...il.com>,
	Song Liu <song@...nel.org>,
	James Clark <james.clark@....com>,
	linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Ian Rogers <irogers@...gle.com>
Subject: Re: [PATCH v3] perf evsel: Refactor tool events

On Fri, 03 May 2024 16:28:49 -0700, Ian Rogers wrote:

> Tool events unnecessarily open a dummy perf event which is useless
> even with `perf record` which will still open a dummy event. Change
> the behavior of tool events so:
> 
>  - duration_time - call `rdclock` on open and then report the count as
>    a delta since the start in evsel__read_counter. This moves code out
>    of builtin-stat making it more general purpose.
> 
> [...]

Applied to perf-tools-next, thanks!

Best regards,
Namhyung