linux-kernel - Re: [PATCH 13/16] perf callchain: Switch default to 'graph,0.5,caller'

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Message-ID: <20151021072902.GH628@sejong>
Date:	Wed, 21 Oct 2015 16:29:02 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Brendan Gregg <brendan.d.gregg@...il.com>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Borislav Petkov <bp@...e.de>,
	Chandler Carruth <chandlerc@...il.com>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Stephane Eranian <eranian@...gle.com>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH 13/16] perf callchain: Switch default to
 'graph,0.5,caller'

Hi Brendan,

On Mon, Oct 19, 2015 at 04:50:11PM -0700, Brendan Gregg wrote:
> On Mon, Oct 12, 2015 at 9:26 PM, Namhyung Kim <namhyung@...nel.org> wrote:
> > On Mon, Oct 05, 2015 at 06:03:35PM -0300, Arnaldo Carvalho de Melo wrote:
> >> From: Arnaldo Carvalho de Melo <acme@...hat.com>
> >>
> >> Which is the most common default found in other similar tools.
> >
> > I think it's more useful to change the default only when --children is
> > used.  And there's a related issue too - please see below link:
> >
> >   https://lkml.org/lkml/2014/8/14/49
> 
> --children is default for things like "perf report --stdio" and
> (implied) "perf script", so any change to --children is a change to
> default.

Hmm.. right.  It should change the default only when --children is
actually used in "perf report" or "perf top" so that "perf script" or
other commands should not be changed.

Thanks,
Namhyung
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