linux-kernel - Re: [PATCH 31/52] perf stat record: Synthesize stat record data

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Date:	Wed, 28 Oct 2015 14:04:28 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Jiri Olsa <jolsa@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"Liang, Kan" <kan.liang@...el.com>
Subject: Re: [PATCH 31/52] perf stat record: Synthesize stat record data

On Tue, Oct 27, 2015 at 11:42:44AM -0300, Arnaldo Carvalho de Melo wrote:

SNIP

> This is confusing...
> 
> Anyway, now the perf.data file doesn't produce that many confusing
> messages, just one, and the error reporting continues needing a
> newline, oops just noticed another problem:
> 
> [root@zoo linux]# perf stat record usleep 1
> 
>  Performance counter stats for 'usleep 1':
> 
>           0.520959      task-clock (msec)         #    0.504 CPUs utilized          
>                  1      context-switches          #    0.002 M/sec                  
>                  0      cpu-migrations            #    0.000 K/sec                  
>                 51      page-faults               #    0.098 M/sec                  
>             929738      cycles                    #    1.785 GHz                    
>             625885      stalled-cycles-frontend   #   67.32% frontend cycles idle   
>    <not supported>      stalled-cycles-backend   
>             634514      instructions              #    0.68  insns per cycle        
>                                                   #    0.99  stalled cycles per insn
>             128859      branches                  #  247.350 M/sec                  
>               7602      branch-misses             #    5.90% of all branches        
> 
>        0.001034675 seconds time elapsed
> 
> [root@zoo linux]# perf evlist
> non matching sample_type[root@zoo linux]#

will check, thanks,

jirka
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