linux-kernel - Re: [PATCH 1/7] perf: introduce raw_type attribute to specify the type of a raw sample

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Date:	Thu, 20 May 2010 18:55:01 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Robert Richter <robert.richter@....com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Paul Mackerras <paulus@...ba.org>,
	David Miller <davem@...emloft.net>,
	Will Deacon <will.deacon@....com>,
	Paul Mundt <lethal@...ux-sh.org>
Subject: Re: [PATCH 1/7] perf: introduce raw_type attribute to specify the
 type of a raw sample


* Robert Richter <robert.richter@....com> wrote:

> On 20.05.10 06:37:39, Peter Zijlstra wrote:
> 
> > So yeah, you might as well expose it as a whole separate PMU using Lin's 
> > stuff.
> 
> This seems to be the most promising alternative to raw_type. But it's also 
> much more bloated requiring sysfs and additional file descriptors.

Not really, fds are really cheap on Linux, and in any case it's only needed 
when the event is created - can be closed afterwards.

	Ingo
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