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

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Message-ID: <20151020121948.GA29289@lerouge>
Date:	Tue, 20 Oct 2015 14:19:50 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc:	Brendan Gregg <brendan.d.gregg@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Borislav Petkov <bp@...e.de>,
	Chandler Carruth <chandlerc@...il.com>,
	David Ahern <dsahern@...il.com>, Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Stephane Eranian <eranian@...gle.com>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH 13/16] perf callchain: Switch default to
 'graph,0.5,caller'

On Tue, Oct 20, 2015 at 09:00:34AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Mon, Oct 19, 2015 at 05:16:53PM -0700, Brendan Gregg escreveu:
> So are you advocating different defaults, one for --stdio (callee),
> another for --tui, --gtk (caller)?
> 
> This is all configurable via ~/.perfconfig :-\
> 
> Indeed, finding a default that is deemed adequate for most people is,
> ho-hum, difficult 8-)

Most uses I've seen on LKML by the past involved callee because people
mostly look at the precise point where a performance issue is.

IMHO changing that order is not a good idea. Unless many users complained
about it.

> 
> Ingo, what do you think?
> 
> - Arnaldo
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