linux-kernel - Re: [PATCH v2 14/16] perf tools: add new mem command for memory access profiling

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Message-ID: <20121106170502.GD13629@infradead.org>
Date:	Tue, 6 Nov 2012 14:05:02 -0300
From:	Arnaldo Carvalho de Melo <acme@...hat.com>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	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>,
	Namhyung Kim <namhyung.kim@....com>
Subject: Re: [PATCH v2 14/16] perf tools: add new mem command for memory
 access profiling

Em Tue, Nov 06, 2012 at 01:51:19PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Tue, Nov 06, 2012 at 04:49:26PM +0100, Stephane Eranian escreveu:
> > On Tue, Nov 6, 2012 at 4:44 PM, Arnaldo Carvalho de Melo
> > <acme@...hat.com> wrote:
> > > Em Mon, Nov 05, 2012 at 02:51:01PM +0100, Stephane Eranian escreveu:
> > >> +             sprintf(event, "cpu/mem-loads/pp");

> > > Fails for me on a Sandy Bridge notebook:

> > That's because you need to update the microcode.
> 
> > $ sudo modprobe microcode
> > $ cat /proc/cpuinfo

> > Line with microcode needs to say:
> > microcode : 0x28

> Here it says:

> microcode	: 0x25

Updated it and now I have 0x28, better:

Samples: 8K of event 'cpu/mem-loads/pp', Event count (approx.): 89255
  0.75%  1  665  L3 hit         [.] arena_run_tree_remove
  0.67%  1  602  LFB hit        [.] nsSMILAnimationController::DoSample(bool)
  0.63%  1  563  Local RAM hit  [.] 0x00000000004620c4
  0.58%  1  515  Local RAM hit  [.] 0x00007f6b278aa7bc
  0.54%  1  479  L2 hit         [.] XPending
  0.33%  1  292  Local RAM hit  [.] nsSVGFEMorphologyElement::Filter(nsSVGFilterInstance*, nsTArray<

Will do more tests after lunch,

- Arnaldo
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