linux-kernel - Re: [PATCH v1 0/4] perf: add ability to sample interrupted machine state

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Message-ID: <CABPqkBRO-p4Nv=2L9J19LgGdTmLTDBbMVf5kWFC8LzpKqax+Yw@mail.gmail.com>
Date:	Wed, 9 Jul 2014 17:26:22 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Namhyung Kim <namhyung@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH v1 0/4] perf: add ability to sample interrupted machine state

On Wed, Jul 9, 2014 at 4:53 PM, Arnaldo Carvalho de Melo
<acme@...nel.org> wrote:
> Em Wed, Jul 09, 2014 at 05:26:20PM +0900, Namhyung Kim escreveu:
>> On Wed,  9 Jul 2014 00:15:55 +0200, Stephane Eranian wrote:
>> > This patch series is the fundation for a future series adding
>> > function value profiling.
>>
>> Probably a silly question: what is the function value profiling?
>
> I think he wants to sample the values of parameters and local variables,
> etc, right?
>
> http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-June/062950.html lists
> some things you can do with that.
>
> Stephane, is that what you mean by "value profiling"?
>
Value profiling means sampling the values of function arguments passed in
registers.
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