linux-kernel - RE: [PATCH 03/14] perf/x86: output multiplexing overhead

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Message-ID: <37D7C6CF3E00A74B8858931C1DB2F07750CA2708@SHSMSX103.ccr.corp.intel.com>
Date:   Wed, 23 Nov 2016 20:09:29 +0000
From:   "Liang, Kan" <kan.liang@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
CC:     "mingo@...hat.com" <mingo@...hat.com>,
        "acme@...nel.org" <acme@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "alexander.shishkin@...ux.intel.com" 
        <alexander.shishkin@...ux.intel.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "namhyung@...nel.org" <namhyung@...nel.org>,
        "jolsa@...nel.org" <jolsa@...nel.org>,
        "Hunter, Adrian" <adrian.hunter@...el.com>,
        "wangnan0@...wei.com" <wangnan0@...wei.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "andi@...stfloor.org" <andi@...stfloor.org>
Subject: RE: [PATCH 03/14] perf/x86: output multiplexing overhead



> 
> On Wed, Nov 23, 2016 at 04:44:41AM -0500, kan.liang@...el.com wrote:
> > From: Kan Liang <kan.liang@...el.com>
> >
> > Multiplexing overhead is one of the key overhead when the number of
> > events is more than available counters.
> >
> > Signed-off-by: Kan Liang <kan.liang@...el.com>
> > ---
> >  include/linux/perf_event.h      |  2 ++
> >  include/uapi/linux/perf_event.h |  1 +
> >  kernel/events/core.c            | 16 ++++++++++++++++
> >  3 files changed, 19 insertions(+)
> 
> The subject says x86 specific, but its _all_ core code.

Oh, Sorry. I will change the subject in next version.

Thanks,
Kan