linux-kernel - Re: [PATCH] perf, x86: Enabled PEBS event to be exported in a raw format

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Message-ID: <1341300987.11663.15.camel@concordia>
Date:	Tue, 03 Jul 2012 17:36:27 +1000
From:	Michael Ellerman <michael@...erman.id.au>
To:	Feng Tang <feng.tang@...el.com>
Cc:	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	x86@...nel.org, Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH] perf, x86: Enabled PEBS event to be exported in a raw
 format

On Fri, 2012-06-29 at 00:00 +0800, Feng Tang wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> Add support for reporting PEBS records in a raw format that can
> be then parsed by perf script.
> 
> This is roughly similar to the existing AMD IBS support.
> 
> This is mainly for advanced users and to experiment with
> new usages. Widespread PEBS usages are expected to get higher
> level interfaces over time, like the existing "precise ip" support.

Hi folks,

Pardon if I slightly hijack this thread, but we'd like to do something
similar to this on powerpc.

I've been telling people not to use PERF_SAMPLE_RAW because it provides
no way for the consumer to know what data they're getting, and it's not
extensible in any way.

So is shovelling things out using PERF_SAMPLE_RAW generally acceptable
for "advanced usage" scenarios?

cheers



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