linux-kernel - Re: [PATCH 15/19] perf tools: Add document for perf-ftrace command

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Message-ID: <20130711114305.GA1056@krava.brq.redhat.com>
Date:	Thu, 11 Jul 2013 13:43:05 +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 15/19] perf tools: Add document for perf-ftrace command

On Thu, Jul 11, 2013 at 05:18:37PM +0900, Namhyung Kim wrote:
> On Wed, 10 Jul 2013 16:22:19 +0200, Jiri Olsa wrote:
> > On Wed, Jun 26, 2013 at 04:14:18PM +0900, Namhyung Kim wrote:
> >> From: Namhyung Kim <namhyung.kim@....com>
> >> 
> >> Cc: Steven Rostedt <rostedt@...dmis.org>
> >> Cc: Frederic Weisbecker <fweisbec@...il.com>
> >> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> >> ---
> >
> > SNIP
> >
> >> +OPTIONS
> >> +-------
> >> +<command>...::
> >> +	Any command you can specify in a shell.
> >> +
> >> +-t::
> >> +--tracer=::
> >> +        The ftrace tracer to be used (default: function_graph).
> >> +	Currently only 'function' and 'function_graph' are supported.
> >> +        Used by 'live' and 'record' subcommands only.
> >
> > hum, 'live' subcommand  supports whatever is available in
> > 'available_tracers' file, right?
> >
> > and displays whatever gets into 'trace' .. which I think
> > is useful and should stay like that
> 
> Agreed.  How about this?
> 
> 	The ftrace tracer to be used (default: function_graph).
> 	Currently, only 'function' and 'function_graph' are
> 	supported by 'record' command. 'live' command accepts
> 	any available tracer in system and outputs trace result
> 	directly from the ftrace's trace_pipe.

sounds good

jirka
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