linux-kernel - Re: [PATCH 2/3] perf stat: Don't require a workload when using system wide or CPU options

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Date:	Tue, 8 Oct 2013 21:24:48 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	David Ahern <dsahern@...il.com>,
	Namhyung Kim <namhyung@...nel.org>,
	linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung.kim@....com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 2/3] perf stat: Don't require a workload when using
 system wide or CPU options


* Arnaldo Carvalho de Melo <acme@...stprotocols.net> wrote:

> Em Tue, Oct 08, 2013 at 02:51:13PM +0200, Ingo Molnar escreveu:
> > Btw., would anyone be interested in adding CPU and node binding options to 
> > perf stat?
> > 
> > There's code to do something like that in tools/perf/bench/numa.c:
> > 
> >         /* Special option string parsing callbacks: */
> >         OPT_CALLBACK('C', "cpus", NULL, "cpu[,cpu2,...cpuN]",
> >                         "bind the first N tasks to these specific cpus (the rest is unbound)",
> >                         parse_cpus_opt),
> >         OPT_CALLBACK('M', "memnodes", NULL, "node[,node2,...nodeN]",
> >                         "bind the first N tasks to these specific memory nodes (the rest is unbound)",
> >                         parse_nodes_opt),
> 
> As a convenience to using:
> 
> 	taskset -c cpu-list perf stat -C cpu-list workload
> 
> ?

Yeah, something like that would be handy I think.

	Ingo
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