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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 20:19:47 +0100
Message-ID: <11785831.IWU0hVXpm2@agathebauer>
Organization: KDAB
In-Reply-To: <20180301180805.GI21543@tassilo.jf.intel.com>
References: <06006a92-3745-0785-cb11-ddbf70e84ded@linux.intel.com>
 <20180301180805.GI21543@tassilo.jf.intel.com>
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On Donnerstag, 1. M=E4rz 2018 19:08:05 CET Andi Kleen wrote:
> On Thu, Mar 01, 2018 at 06:40:04PM +0300, Alexey Budankov wrote:
> > Hi,
> >=20
> > This patch prototypes exposing the type of context-switch-out event usi=
ng
> > PERF_RECORD_MISC_EXT_RESERVED bit for PERF_RECORD_SWITCH[_CPU_WIDE]
> > records.
> It would be better to define an actually named bit in perf_event.h.
> It can be the same value.
>=20
> Also we would need a patch for perf script / perf report -D to print this
> information.
>=20
> The rest looks good to me.

Please also add documentation Documentation/perf.data-file-format.txt, but =
I=20
just noticed that not even PERF_RECORD_SWITCH is documented there...

Otherwise I also think that this would be a very nice feature addition!

=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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