linux-kernel - Re: [PATCH 15/15] perf record: Add --buildid-mmap option to enable mmap's build id

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Message-ID: <20201228230224.GE450923@krava>
Date:   Tue, 29 Dec 2020 00:02:24 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Ingo Molnar <mingo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Michael Petlan <mpetlan@...hat.com>,
        Song Liu <songliubraving@...com>,
        Stephane Eranian <eranian@...gle.com>,
        Alexei Budankov <abudankov@...wei.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCH 15/15] perf record: Add --buildid-mmap option to enable
 mmap's build id

On Mon, Dec 28, 2020 at 10:44:37AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Mon, Dec 14, 2020 at 11:54:57AM +0100, Jiri Olsa escreveu:
> > Adding --buildid-mmap option to enable build id in mmap2 events.
> > It will only work if there's kernel support for that and it disables
> > build id cache (implies --no-buildid).
> > 
> > It's also possible to enable it permanently via config option
> > in ~.perfconfig file:
> > 
> >   [record]
> >   build-id=mmap
> > 
> > Also added build_id bit in the verbose output for perf_event_attr:
> > 
> >   # perf record --buildid-mmap -vv
> >   ...
> >   perf_event_attr:
> >     type                             1
> >     size                             120
> >     ...
> >     build_id                         1
> > 
> > Adding also missing text_poke bit.
> 
> I'm moving this to just before the:
> 
>   perf tools: Add support to display build id when available in PERF_RECORD_MMAP2 events
> 
> So that I can actually print the synthesized/obtained from the kernel
> build-ids, i.e. this:
> 
>   perf report -D | grep MMAP2 | head -4
> 
> Will work at that point.

ok, thanks

jirka