linux-kernel - Re: [PATCH 05/19] perf tools: Introduce new 'ftrace' tool

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Message-ID: <51CB208A.6080403@gmail.com>
Date:	Wed, 26 Jun 2013 11:10:34 -0600
From:	David Ahern <dsahern@...il.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>,
	Jiri Olsa <jolsa@...hat.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 05/19] perf tools: Introduce new 'ftrace' tool

On 6/26/13 1:14 AM, Namhyung Kim wrote:
> +	const char * const ftrace_usage[] = {
> +		"perf ftrace [<options>] [<command>]",
> +		"perf ftrace [<options>] -- <command> [<options>]",
> +		NULL
> +	};
> +	const struct option ftrace_options[] = {
> +	OPT_STRING('t', "tracer", &ftrace.tracer, "tracer",
> +		   "tracer to use"),

How does a user know what is a valid tracer string?

David
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