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Date: Tue, 10 Sep 2013 05:55:35 -0700
Message-ID: <CAMsRxfLn7D-ON=gfrxttA5okPg=pyB_a-hHMBPVwGgO1_yHXYQ@mail.gmail.com>
Subject: Re: PEBS bug on HSW: "Unexpected number of pebs records 10" (was: Re:
 [GIT PULL] perf changes for v3.12)
From: Stephane Eranian <eranian@googlemail.com>
To: Ramkumar Ramachandra <artagnon@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>, Peter Zijlstra <peterz@infradead.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Arnaldo Carvalho de Melo <acme@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>, Andi Kleen <andi@firstfloor.org>
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On Tue, Sep 10, 2013 at 5:51 AM, Ramkumar Ramachandra
<artagnon@gmail.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.
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