linux-kernel - Re: [RFC 00/14] perf tools: Introduce new 'ftrace' command

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Message-ID: <20130424065018.GC27551@gmail.com>
Date:	Wed, 24 Apr 2013 08:50:18 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Pekka Enberg <penberg@...nel.org>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>, David Ahern <dsahern@...il.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [RFC 00/14] perf tools: Introduce new 'ftrace' command


* Pekka Enberg <penberg@...nel.org> wrote:

> Hello,
> 
> On Tue, 2013-04-23 at 17:30 +0900, Namhyung Kim wrote:
> >> This patchset implements a front-end tool for kernel's ftrace.  It
> >> uses function_graph tracer by default and normal function tracer is
> >> also supported.  (Of course you need to enable those tracers in your
> >> kernel first.)
> 
> On Tue, Apr 23, 2013 at 6:58 PM, Steven Rostedt <rostedt@...dmis.org> wrote:
> > Very nice Namhyung, thanks for doing this. I did a quick run through of
> > the patches and I have no complaints about them. I'm not sure how the
> > others will feel about it.
> 
> I also skimmed through the patches and they look like a reasonable
> starting point. So FWIW,
> 
> Acked-by: Pekka Enberg <penberg@...nel.org>
> 
> Are there any plans in trying to consolidate 'perf trace' and this? As
> a user I don't really care what the underlying mechanism and would
> like things to just work out of the box.

Exactly. I'd love to see ftrace and perf trace unified.

I have no objections against having a 'perf ftrace' interim step - as long 
as it's really a temporary migration construct, not something we intend to 
keep forever.

Thanks,

	Ingo
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