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

From: Ingo Molnar
Date: Tue Sep 10 2013 - 09:22:26 EST



* Stephane Eranian <eranian@xxxxxxxxxxxxxx> wrote:

> On Tue, Sep 10, 2013 at 5:51 AM, Ramkumar Ramachandra
> <artagnon@xxxxxxxxx> 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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