linux-kernel - Re: performance counter for linux question.

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Date:	Sat, 19 Sep 2009 10:01:14 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	sebastien cabaniols <sebastien.cabaniols@...com>
Cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: performance counter for linux question.


* sebastien cabaniols <sebastien.cabaniols@...com> wrote:

> Hello list,
> 
> I am interested by monitoring instructions versus cycles with a Nehalem box 
> using 2.6.31 with PCL.
> 
> Is there a way with perf report to display both counters ?
> 
> I used
> 
> perf record -e cycles -e instructions -a  for the recording session.
> 
> perf report -n seems to be doing what I need but for only one counter.
> 
> Is this a limitation of perf report ? 
> Is this an architectural limitation of PCL ?
> Is there more documentation than what is in the perf directory in the 2.6.31 
> tarball ?

You can find a description and a tutorial here:

  http://lwn.net/Articles/339361/

There's also http://perf.wiki.kernel.org.

	Ingo
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