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From:   Milian Wolff <milian.wolff@kdab.com>
To:     Andi Kleen <ak@linux.intel.com>
Cc:     Alexey Budankov <alexey.budankov@linux.intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@redhat.com>,
        Namhyung Kim <namhyung@kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Dmitri Prokhorov <Dmitry.Prohorov@intel.com>
Subject: Re: [RFC PATCH] perf/core: exposing type of context-switch-out event
Date:   Thu, 01 Mar 2018 21:57:07 +0100
Message-ID: <8840260.4tRkpliXxk@agathebauer>
Organization: KDAB
In-Reply-To: <20180301193659.GJ21543@tassilo.jf.intel.com>
References: <06006a92-3745-0785-cb11-ddbf70e84ded@linux.intel.com>
 <11785831.IWU0hVXpm2@agathebauer>
 <20180301193659.GJ21543@tassilo.jf.intel.com>
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On Donnerstag, 1. M=E4rz 2018 20:36:59 CET Andi Kleen wrote:
> > Please also add documentation Documentation/perf.data-file-format.txt, =
but
> > I just noticed that not even PERF_RECORD_SWITCH is documented there...
>
> That file only covers fields not generated by the kernel, but this
> is coming from the kernel.
>=20
> Kernel records are documented in the manpage, but Vince usually updates
> that on his own.

Ah, TIL - thanks for that tip! But I still think it would be good to have a=
=20
complete documentation of the perf.data file format in one place. I guess=20
patches would be welcome to add more aspects of the file format there, even=
 if=20
it's generated by the kernel? That helps for thirdparty tools that parse th=
e=20
perf.data files (like perfparser used by QtCreator and hotspot).

Cheers

=2D-=20
Milian Wolff | milian.wolff@kdab.com | Senior Software Engineer
KDAB (Deutschland) GmbH, a KDAB Group company
Tel: +49-30-521325470
KDAB - The Qt, C++ and OpenGL Experts
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