linux-kernel - Re: [PATCH] perf pmu: Fix perf stat output with correct scale and unit

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAM9d7cjH_YR9W_Ab-AuJR983GYn3s+ScwexCWid3Q6a+GzWDVg@mail.gmail.com>
Date:   Tue, 26 Sep 2023 15:50:49 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Wyes Karny <wyes.karny@....com>, peterz@...radead.org,
        mingo@...hat.com, acme@...nel.org, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        adrian.hunter@...el.com, kan.liang@...ux.intel.com,
        james.clark@....com, linux-perf-users@...r.kernel.org,
        linux-kernel@...r.kernel.org, sandipan.das@....com,
        ravi.bangoria@....com
Subject: Re: [PATCH] perf pmu: Fix perf stat output with correct scale and unit

On Wed, Sep 20, 2023 at 9:02 AM Ian Rogers <irogers@...gle.com> wrote:
>
> On Wed, Sep 20, 2023 at 5:24 AM Wyes Karny <wyes.karny@....com> wrote:
> >
> > The perf_pmu__parse_* functions for the sysfs files of pmu event’s
> > scale, unit, per-pkg and snapshot were updated in commit 7b723dbb96e8
> > ("perf pmu: Be lazy about loading event info files from sysfs").
> > However, the paths for these sysfs files were incorrect. This resulted
> > in perf stat reporting values with wrong scaling and missing units. This
> > is fixed by correcting the paths for these sysfs files.
> >
> > Before this fix:
> >
> >  $sudo perf stat -e power/energy-pkg/ -- sleep 2
> >
> >  Performance counter stats for 'system wide':
> >
> >    351,217,188,864      power/energy-pkg/
> >
> >           2.004127961 seconds time elapsed
> >
> > After this fix:
> >
> >  $sudo perf stat -e power/energy-pkg/ -- sleep 2
> >
> >  Performance counter stats for 'system wide':
> >
> >              80.58 Joules power/energy-pkg/
> >
> >              2.004009749 seconds time elapsed
> >
> > Fixes: 7b723dbb96e8 ("perf pmu: Be lazy about loading event info files from sysfs")
> > Signed-off-by: Wyes Karny <wyes.karny@....com>
>
> Reviewed-by: Ian Rogers <irogers@...gle.com>

Applied to perf-tools-next, thanks!