linux-kernel - Re: PEBS bug on HSW: "Unexpected number of pebs records 10" (was: Re: [GIT PULL] perf changes for v3.12)

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Message-ID: <20130910132215.GA7537@gmail.com>
Date:	Tue, 10 Sep 2013 15:22:15 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	eranian@...il.com
Cc:	Ramkumar Ramachandra <artagnon@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: PEBS bug on HSW: "Unexpected number of pebs records 10" (was:
 Re: [GIT PULL] perf changes for v3.12)


* Stephane Eranian <eranian@...glemail.com> wrote:

> On Tue, Sep 10, 2013 at 5:51 AM, Ramkumar Ramachandra
> <artagnon@...il.com> wrote:
> > Stephane Eranian wrote:
> >> a simple multithreaded program where
> >> #threads >> #CPUs
> >
> > To put it another way, does Intel's HT work for CPU intensive and IO
> > minimal tasks? I think HT assumes some amount of inefficient IO
> > coupled with pure CPU usage.
> 
> But your remark has nothing to do with the PMU issue.

To quote Al Viro:

  "One name: Mark V. Shaney..."

Update your email filters if it gets annoying.

Thanks,

	Ingo
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