linux-kernel - Re: [PATCH 05/34] perf, x86: Report PEBS event in a raw format

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Message-ID: <20121023141122.GI16230@one.firstfloor.org>
Date:	Tue, 23 Oct 2012 16:11:22 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>, x86 <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 05/34] perf, x86: Report PEBS event in a raw format


... NIH snipped ... 

> If you do this inside perf, you have access to more infrastructure
> code, e.g., dwarf.
> For instance, I am interested in getting a value profiling mode. That
> means sampling
> the values of function arguments. That needs some dwarf support and the PEBS
> machine state. With that you can produce a per function histogram of
> the 6 integer
> register args. You can certainly build anything in Python, but I don't
> see the point
> of this. Especially given that there is already some infrastructure
> (and abstraction)
> provided by Jiri's patch for PERF_SAMPLE_REGS.

Ok so please post some code for this.

I'm sure all your unwritten code is far greater than our written code
posted on mailing lists, but it's not a very useful discussion this way.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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