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

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Message-ID: <20100520065143.GA14480@elte.hu>
Date:	Thu, 20 May 2010 08:51:43 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc:	Robert Richter <robert.richter@....com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Stephane Eranian <eranian@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Lin Ming <ming.m.lin@...el.com>
Subject: Re: [PATCH 1/7] perf: introduce raw_type attribute to specify the
 type of a raw sample


* Corey Ashford <cjashfor@...ux.vnet.ibm.com> wrote:

> [...]
> 
> Have you looked at Lin Ming's patch series?  I think it 
> offers another way to support IBS and other 
> arch-specific and off-chip PMUs in a more general way, 
> though it's not quite fully-baked yet.

Robert, check out this thread on lkml:

  [RFC][PATCH v2 06/11] perf: core, export pmus via sysfs

Here is Peter's post that describes the high level design:

  http://groups.google.com/group/linux.kernel/msg/ab9aa075016c639e

And please help out Lin Ming with this work - we dont want 
to add new, special-purpose ABI extensions for enumeration 
purposes, it should be introduced using a new event_source 
node via the sysfs enumeration.

Whether IBS fits that category is an open question - 
ideally it should have similar high level usage as the 
PEBS/LBR bits on Intel CPUs. (at least as far as tooling 
goes)

Thanks,

	Ingo
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