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 19:16:35 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Robert Richter <robert.richter@....com>
Cc:	Ingo Molnar <mingo@...e.hu>, 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

On Thu, 2010-05-20 at 19:07 +0200, Robert Richter wrote:
> On 20.05.10 12:55:01, Ingo Molnar wrote:
> > 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.
> 
> I was wondering if we could get the perf event fd directly with the
> open("/sys/...") command? This would be really easy to set up.

I guess we could sorta do that, but then we'd need a ioctl to change the
perf_event_attr.
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