linux-kernel - Re: [patch] perf stat: --repeat forever

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Message-ID: <20130218172438.GB5199@ks398093.ip-192-95-24.net>
Date:	Mon, 18 Feb 2013 12:24:38 -0500
From:	Frederik Deweerdt <frederik.deweerdt@...og.eu>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	a.p.zijlstra@...llo.nl, paulus@...ba.org, mingo@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] perf stat: --repeat forever

Hi Arnaldo,

On Mon, Feb 18, 2013 at 12:04:44PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Feb 15, 2013 at 05:28:49PM -0500, Frederik Deweerdt escreveu:
> > Hi,
> > 
> > The following patch causes 'perf stat --repeat 0' to be interpreted as
> > 'forever', displaying the stats for every run.
> > 
> > We act as if a single run was asked, and reset the stats in each
> > iteration. In this mode SIGINT is passed to perf to be able to stop the
> > loop with Ctrl+C.
> 
> It is not applying to my perf/core branch, please take a look at:
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
> 
> branch perf/core
> 
Noted, I'll base the next version based on this branch.

> Also please consider removing the need to specify 0, i.e. I think this
> is possible and shorter:
> 
> # perf stat -a --repeat sleep 1

I'm unsure how to achieve that. I've looked at the different OPT_*
defines, but I can't find one that would do the job. Any pointers?

Thanks,
Frederik
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