linux-kernel - Re: [PATCH] perf stat: Print topology/time headers with --metric-only

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Date:	Fri, 20 May 2016 17:36:52 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	acme@...nel.org, jolsa@...nel.org, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH] perf stat: Print topology/time headers with --metric-only

On Fri, May 20, 2016 at 07:29:59AM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> When --metric-only is enabled there were no headers for the topology
> in interval mode.  Fix this here.
> 
> Before
> 
> $ perf stat --metric-only -e cycles,instructions -a -I 1000
>      1.000554967 insn per cycle       stalled cycles per insn
>      1.000554967    0.27
>      2.000862000    0.24
>      3.001354948    0.25
> 
> After
> 
> $ perf stat --metric-only -e cycles,instructions -a -I 1000
>      1.000554967 insn per cycle       stalled cycles per insn
>      1.000554967    0.27
>      2.000862000    0.24
>      3.001354948    0.25

hum, I'm getting something else:

[jolsa@...-x3650m4-01 perf]$ sudo ./perf stat --topdown -I 1000 -a
nmi_watchdog enabled with topdown. May give wrong results.
Disable with echo 0 > /proc/sys/kernel/nmi_watchdog
#           time core         cpus
     1.001710838                   retiring             bad speculation      frontend bound       backend bound        
     1.001710838 S0-C0           2     38.1%               -0.0%               58.8%                3.1%           
     1.001710838 S0-C1           2     38.0%                0.0%               59.4%                2.5%           


[jolsa@...-x3650m4-01 perf]$ sudo ./perf stat --metric-only -e cycles,instructions -a -I 1000
#           time
     1.000756338 insn per cycle       stalled cycles per insn 
     1.000756338    0.32                                      
     2.001155562    0.30                                      


jirka