linux-kernel - Re: Problem with perf hardware counters grouping

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Message-ID: <alpine.DEB.2.00.1109011322440.9976@cl320.eecs.utk.edu>
Date:	Thu, 1 Sep 2011 13:24:46 -0400
From:	Vince Weaver <vweaver1@...s.utk.edu>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Mike Hommey <mh@...ndium.org>, <linux-kernel@...r.kernel.org>
Subject: Re: Problem with perf hardware counters grouping

On Thu, 1 Sep 2011, Vince Weaver wrote:

> 
> Does the perf tool work around this in some way?  

oh I see, the perf tool, at least when using perf -e stat on multiple 
events, opens each event individually.  PAPI uses group leaders which is 
why we see the issue.

Vince
vweaver1@...s.utk.edu

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