linux-kernel - Re: [PATCH 06/19] perf ftrace: Add support for --pid option

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Message-ID: <20130710141820.GA5931@krava.brq.redhat.com>
Date:	Wed, 10 Jul 2013 16:18:20 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	David Ahern <dsahern@...il.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 06/19] perf ftrace: Add support for --pid option

On Wed, Jun 26, 2013 at 04:14:09PM +0900, Namhyung Kim wrote:
> From: Namhyung Kim <namhyung.kim@....com>
> 
> The -p (--pid) option enables to trace existing process by its pid.

hi,
I can't get any output from -p for live subcommand:

[jolsa@...va perf]$ pgrep yes
6443
[jolsa@...va perf]$ sudo ./perf ftrace live -p `pgrep yes`

jirka
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