linux-kernel - Re: [PATCH 2/3] perf tools: remove pid option from stat

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Message-ID: <20091230092327.GA10486@elte.hu>
Date:	Wed, 30 Dec 2009 10:23:27 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Liming Wang <liming.wang@...driver.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] perf tools: remove pid option from stat


* Peter Zijlstra <peterz@...radead.org> wrote:

> On Tue, 2009-12-29 at 16:37 +0800, Liming Wang wrote:
> > pid option is useless for stat, so remove it.
> 
> Hmm, it shouldn't be.. and instead of removing it I would suggesting fixing 
> this.

Yes. For exampe something like:

  perf stat --repeat 10 --pid $(pidof firefox) sleep 1

Should show firefox's resource usage sampled over 10 seconds.

If this doesnt work it should be fixed. Plus i suspect we should allow:

  perf stat --pid $(pidof firefox)

to run until Ctrl-C - like perf record allows.

	Ingo
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