linux-kernel - Re: [PATCH 0/5] perf tools: Clean up cpu map handling for a system-wide evsel (v1)

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Date:   Mon, 26 Sep 2022 20:24:50 +0100
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Namhyung Kim <namhyung@...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>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org,
        Kan Liang <kan.liang@...ux.intel.com>,
        Leo Yan <leo.yan@...aro.org>
Subject: Re: [PATCH 0/5] perf tools: Clean up cpu map handling for a
 system-wide evsel (v1)

Em Sat, Sep 24, 2022 at 09:57:32AM -0700, Namhyung Kim escreveu:
> Hello,
> 
> The system-wide evsel has a cpu map for all (online) cpus regardless
> of user requested cpus.  But the cpu map handling code has some
> special case for it and I think we can cleanup the code by making sure
> that such a evsel has a proper cpu/thread maps from the beginning.
> This patches should not cause any change in the behavior.
> 
> You can get the code from 'perf/cpumap-update-v1' branch in
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git
>   
> Thanks,
> Namhyung

Looks sane, applied locally for testing.

- Arnaldo
 
> 
> Namhyung Kim (5):
>   libperf: Populate system-wide evsel maps
>   libperf: Propagate maps only if necessary
>   perf tools: Get rid of evlist__add_on_all_cpus()
>   perf tools: Add evlist__add_sched_switch()
>   perf tools: Remove special handling of system-wide evsel
> 
>  tools/lib/perf/evlist.c             | 23 ++++++++-------
>  tools/lib/perf/evsel.c              |  3 --
>  tools/perf/arch/x86/util/intel-pt.c | 15 ++++------
>  tools/perf/builtin-script.c         |  3 --
>  tools/perf/tests/switch-tracking.c  | 15 ++++------
>  tools/perf/util/evlist.c            | 46 ++++++++++++-----------------
>  tools/perf/util/evlist.h            |  1 +
>  tools/perf/util/evsel.c             | 12 ++------
>  tools/perf/util/stat.c              |  3 --
>  9 files changed, 44 insertions(+), 77 deletions(-)
> 
> -- 
> 2.37.3.998.g577e59143f-goog

-- 

- Arnaldo