linux-kernel - Re: [PATCH v2 2/2] perf record: Save DSO build-ID for synthesizing

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Message-ID: <CAM9d7ch1GG2xjOpPwMf0q88CWtX2DdSiRXDJX6vevTk_1g+USw@mail.gmail.com>
Date:   Wed, 5 Oct 2022 10:50:01 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...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 <linux-perf-users@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] perf record: Save DSO build-ID for synthesizing

Hi Arnaldo,

On Wed, Sep 21, 2022 at 10:55 AM Namhyung Kim <namhyung@...nel.org> wrote:
>
> On Wed, Sep 21, 2022 at 6:50 AM Arnaldo Carvalho de Melo
> <acme@...nel.org> wrote:
> >
> > Em Tue, Sep 20, 2022 at 03:28:22PM -0700, Namhyung Kim escreveu:
> > > When synthesizing MMAP2 with build-id, it'd read the same file repeatedly as
> > > it has no idea if it's done already.  Maintain a dsos to check that and skip
> > > the file access if possible.
> > >
> > > Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> > > ---
> > > v2 change)
> > >  * Remove perf_event__synthesize_{start,stop} and use machine->dsos  (Adrian)
> >
> > Will wait till I merge perf/urgent into perf/core so that this applies.

I think it's doable now :)

Thanks,
Namhyung