linux-kernel - Re: [PATCH 4/4][RFC] perf_counter: Allow sharing of output channels

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Message-ID: <20090819130055.GA14215@elte.hu>
Date:	Wed, 19 Aug 2009 15:00:55 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>, linux-kernel@...r.kernel.org,
	stephane eranian <eranian@...glemail.com>
Subject: Re: [PATCH 4/4][RFC] perf_counter: Allow sharing of output channels


* Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:

> > Does this only apply to sampling counters?
> 
> Yeah, everything that would otherwise go through the mmap() 
> buffer.

Note that this can include sample-driven normal counts as well, 
i.e. PERF_SAMPLE_READ and perf record -s/--stat.

	Ingo
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