linux-kernel - Re: [PATCHSET 0/7] perf sched: Introduce timehist command, again (v1)

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Date:   Tue, 15 Nov 2016 08:34:13 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        David Ahern <dsahern@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Jiri Olsa <jolsa@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCHSET 0/7] perf sched: Introduce timehist command, again (v1)


* Namhyung Kim <namhyung@...nel.org> wrote:

> > > By default it shows the individual schedule events, including the time between
> > > sched-in events for the task, the task scheduling delay (time between wakeup
> > > and actually running) and run time for the task:
> > > 
> > >            time cpu  task name[tid/pid]    b/n time sch delay  run time
> > >   ------------- ---- -------------------- --------- --------- ---------
> > >    79371.874569 [11] gcc[31949]               0.014     0.000     1.148
> > >    79371.874591 [10] gcc[31951]               0.000     0.000     0.024
> > >    79371.874603 [10] migration/10[59]         3.350     0.004     0.011
> > >    79371.874604 [11] <idle>                   1.148     0.000     0.035
> > >    79371.874723 [05] <idle>                   0.016     0.000     1.383
> > >    79371.874746 [05] gcc[31949]               0.153     0.078     0.022
> > > ...
> > 
> > What does the 'b/n' abbreviation stand for? 'Between'? Could we call the column 
> > 'sch wait' instead, or so?
> 
> Looks better, or what about 'wait time'?

Works for me!

> I'd go with the first option - simply adding arrows.  It's good enough to 
> identify each function IMHO.

Ok!

Thanks,

	Ingo