linux-kernel - Re: [PATCH] perf, x86: Make cycles:p working on SNB

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Message-ID: <87obpeq7fg.fsf@sejong.aot.lge.com>
Date:	Thu, 24 May 2012 18:01:23 +0900
From:	Namhyung Kim <namhyung.kim@....com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Stephane Eranian <eranian@...gle.com>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Paul Mackerras <paulus@...ba.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf, x86: Make cycles:p working on SNB

On Thu, 24 May 2012 10:07:53 +0200, Peter Zijlstra wrote:
> On Thu, 2012-05-24 at 10:00 +0200, Stephane Eranian wrote:
>> The PREC_DIST is by design, it is not a work-around of any sort.
>> It is an attempt at getting a better distribution of samples when sampling
>> with inst_retired.
>
> Oh completely agreed, note that my patch used UOPS_RETIRED.ALL. Only
> Namhyung used PREC_DIST, mostly I suspect because he's not stared at all
> these manuals for long yet ;-)

True. :)

Thanks,
Namhyung
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