linux-kernel - Re: RFP: Fixing "-ga -ag -g fp -g dwarf" was Re: [PATCHSET 0/8] perf tools: Fix scalability problem on callchain merging (v5)

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Date:	Fri, 25 Oct 2013 16:46:43 -0300
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	David Ahern <dsahern@...il.com>
Cc:	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: RFP: Fixing "-ga -ag -g fp -g dwarf" was Re: [PATCHSET 0/8] perf
 tools: Fix scalability problem on callchain merging (v5)

Em Fri, Oct 25, 2013 at 01:22:27PM -0600, David Ahern escreveu:
> On 10/25/13 1:09 PM, Arnaldo Carvalho de Melo wrote:
> >>>I think I did with the second follow up patch: -ga -ag -g fp -g
> >>>dwarf should all work properly with fp the default for -g.

> >>Acked-by: Ingo Molnar <mingo@...nel.org>

> >Can I have this one submitted?
 
> Upon further review, Jiri was correct: that patch handles some of
> the old cases fine, but did not handle others. ie., it just moved
> the bad syntax problem around.

perhaps we can do, at least for now, with what Ingo suggested?

Namely, having:

--call-graph   Require an argument, either "dwarf" or "fp"
-g             Doesn't require anything, uses whatever is configured,
               fp if no explicit config is done in places like
               ~/.perfconfig

Fits with what most people do usually, no?

- Arnaldo
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