linux-kernel - Re: [PATCH 6/8] perf script: Display stat events by default

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Date:	Tue, 5 Jan 2016 19:49:27 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Jiri Olsa <jolsa@...nel.org>
Cc:	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 6/8] perf script: Display stat events by default

Em Tue, Jan 05, 2016 at 10:09:10PM +0100, Jiri Olsa escreveu:
> If no script is specified for stat data, display
> stat events in raw form.
> 
>   $ perf stat record ls
> 
>   SNIP
> 
>    Performance counter stats for 'ls':
> 
>             0.851585      task-clock (msec)         #    0.717 CPUs utilized
>                    0      context-switches          #    0.000 K/sec
>                    0      cpu-migrations            #    0.000 K/sec
>                  114      page-faults               #    0.134 M/sec
>            2,620,918      cycles                    #    3.078 GHz
>      <not supported>      stalled-cycles-frontend
>      <not supported>      stalled-cycles-backend
>            2,714,111      instructions              #    1.04  insns per cycle
>              542,434      branches                  #  636.970 M/sec
>               15,946      branch-misses             #    2.94% of all branches
> 
>          0.001186954 seconds time elapsed
> 
>   $ perf script
>   CPU   THREAD             VAL             ENA             RUN            TIME EVENT
>    -1    26185          851585          851585          851585         1186954 task-clock
>    -1    26185               0          851585          851585         1186954 context-switches
>    -1    26185               0          851585          851585         1186954 cpu-migrations
>    -1    26185             114          851585          851585         1186954 page-faults
>    -1    26185         2620918          853340          853340         1186954 cycles
>    -1    26185               0               0               0         1186954 stalled-cycles-frontend
>    -1    26185               0               0               0         1186954 stalled-cycles-backend
>    -1    26185         2714111          853340          853340         1186954 instructions
>    -1    26185          542434          853340          853340         1186954 branches
>    -1    26185           15946          853340          853340         1186954 branch-misses
> 
> Tested-by: Kan Liang <kan.liang@...el.com>

The CPU field is getting misformatted:

[acme@zoo linux]$ 
[acme@zoo linux]$ perf stat record usleep 1

 Performance counter stats for 'usleep 1':

          0.356474      task-clock (msec)         #    0.516 CPUs utilized          
                 1      context-switches          #    0.003 M/sec                  
                 0      cpu-migrations            #    0.000 K/sec                  
                54      page-faults               #    0.151 M/sec                  
         1,044,123      cycles                    #    2.929 GHz                    
           716,911      stalled-cycles-frontend   #   68.66% frontend cycles idle   
   <not supported>      stalled-cycles-backend   
           694,609      instructions              #    0.67  insns per cycle        
                                                  #    1.03  stalled cycles per insn
           140,037      branches                  #  392.839 M/sec                  
             7,920      branch-misses             #    5.66% of all branches        

       0.000690200 seconds time elapsed

[acme@zoo linux]$ 
[acme@zoo linux]$ perf script
CPU   THREAD             VAL             ENA             RUN            TIME EVENT
65535     4883          356474          356474          356474          690200 task-clock
65535     4883               1          356474          356474          690200 context-switches
65535     4883               0          356474          356474          690200 cpu-migrations
65535     4883              54          356474          356474          690200 page-faults
65535     4883         1044123          360329          360329          690200 cycles
65535     4883          716911          360329          360329          690200 stalled-cycles-frontend
65535     4883               0               0               0          690200 stalled-cycles-backend
65535     4883          694609          360329          360329          690200 instructions
65535     4883          140037          360329          360329          690200 branches
65535     4883            7920          360329          360329          690200 branch-misses
[acme@zoo linux]$
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