linux-kernel - Re: [PATCH] perf stat: Fix no metric header if --per-socket and --metric-only set

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Date:   Mon, 6 Apr 2020 11:12:06 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Jin Yao <yao.jin@...ux.intel.com>, jolsa@...nel.org,
        peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, Linux-kernel@...r.kernel.org,
        ak@...ux.intel.com, kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH] perf stat: Fix no metric header if --per-socket and
 --metric-only set

Em Fri, Apr 03, 2020 at 11:45:00AM +0200, Jiri Olsa escreveu:
> On Wed, Apr 01, 2020 at 02:02:26AM +0800, Jin Yao wrote:
> > We received a report that was no metric header displayed if --per-socket
> > and --metric-only were both set.
> > 
> > It's hard for script to parse the perf-stat output. This patch fixes this
> > issue.
> > 
> > Before:
> > 
> >   root@...-ppc:~# perf stat -a -M CPI --metric-only --per-socket
> >   ^C
> >    Performance counter stats for 'system wide':
> > 
> >   S0        8                  2.6
> > 
> >          2.215270071 seconds time elapsed
> > 
> >   root@...-ppc:~# perf stat -a -M CPI --metric-only --per-socket -I1000
> >   #           time socket cpus
> >        1.000411692 S0        8                  2.2
> >        2.001547952 S0        8                  3.4
> >        3.002446511 S0        8                  3.4
> >        4.003346157 S0        8                  4.0
> >        5.004245736 S0        8                  0.3
> > 
> > After:
> > 
> >   root@...-ppc:~# perf stat -a -M CPI --metric-only --per-socket
> >   ^C
> >    Performance counter stats for 'system wide':
> > 
> >                                CPI
> >   S0        8                  2.1
> > 
> >          1.813579830 seconds time elapsed
> > 
> >   root@...-ppc:~# perf stat -a -M CPI --metric-only --per-socket -I1000
> >   #           time socket cpus                  CPI
> >        1.000415122 S0        8                  3.2
> >        2.001630051 S0        8                  2.9
> >        3.002612278 S0        8                  4.3
> >        4.003523594 S0        8                  3.0
> >        5.004504256 S0        8                  3.7
> > 
> > Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
> 
> Acked-by: Jiri Olsa <jolsa@...hat.com>

Thanks, applied.

- Arnaldo