linux-kernel - Re: [PATCH] perf tools: Fix reading of perf.data file header

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Date:	Fri, 7 Aug 2009 10:23:18 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Brice Goglin <Brice.Goglin@...ia.fr>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>, paulus@...ba.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf tools: Fix reading of perf.data file header


* Brice Goglin <Brice.Goglin@...ia.fr> wrote:

> Ingo Molnar wrote:
> > I completely forgot about it. And since we now have --scale enabled 
> > by default (and it doesnt make much sense to disable it i guess), it 
> > would not be a big issue to rename that -c/--scale to free up that 
> > flag for -S/--stat?
> >
> > 	Ingo
> >   
> 
> 
> Here you are. But how do you switch "scale" off now that it's 
> disabled by default? I tried --scale=0, --no-scale and so on 
> without apparently succeeding.

--no-scale seems to work here:

aldebaran:~> perf stat --no-scale -e 0:0 -e 0:0 -e 0:0 -e 0:0 -e 0:0 
-e 0:0 -e 0:0 -e 0:0 ~/loop_1b_instructions

 Performance counter stats for '/home/mingo/loop_1b_instructions':

      469128160  cycles                  
      469072870  cycles                  
      470517049  cycles                  
      473750835  cycles                  
      476987439  cycles                  
      477364955  cycles                  
      474188871  cycles                  
      470950809  cycles                  

    0.237171581  seconds time elapsed

aldebaran:~> perf stat --scale -e 0:0 -e 0:0 -e 0:0 -e 0:0 -e 0:0 -e 
0:0 -e 0:0 -e 0:0 ~/loop_1b_instructions

 Performance counter stats for '/home/mingo/loop_1b_instructions':

      756242908  cycles                    (scaled from 62.00%)
      756238670  cycles                    (scaled from 62.00%)
      756237417  cycles                    (scaled from 62.23%)
      756093940  cycles                    (scaled from 62.66%)
      756097133  cycles                    (scaled from 63.08%)
      756141523  cycles                    (scaled from 63.10%)
      756142674  cycles                    (scaled from 62.68%)
      756154220  cycles                    (scaled from 62.26%)

    0.236972028  seconds time elapsed

	Ingo
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