linux-kernel - Re: [PATCH v2] perf tools: Document --children option in more detail

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Date:	Tue, 21 Apr 2015 09:26:10 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jiri Olsa <jolsa@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Taeung Song <treeze.taeung@...il.com>
Subject: Re: [PATCH v2] perf tools: Document --children option in more detail


* Namhyung Kim <namhyung@...nel.org> wrote:

> Hi Ingo,
> 
> On Mon, Apr 20, 2015 at 08:04:11PM +0200, Ingo Molnar wrote:
> > 
> > * Namhyung Kim <namhyung@...nel.org> wrote:
> > 
> > > As the --children option changes the output of perf report (and perf
> > > top) it sometimes confuses users.  Add more words and examples to help
> > > understanding of the option's behavior - and how to disable it ;-).
> > 
> > Nice! :-)
> 
> Thanks! :)
> 
> > 
> > > +++ b/tools/perf/Documentation/overhead.txt
> > 
> > As some people might stumble upon this the old fashioned way, by 
> > looking around in 'Documentation/', I'm wondering how this file name 
> > will tell the reader that this is about call chains? (which isn't the 
> > default recording mode) Maybe name it more explicitly, like 
> > callchain-overhead.txt?
> 
> OK.  But I'd rather name it 'overhead-calculation.txt' to align with
> the section name.  And 'callchain-overhead' makes me thinking about
> the overhead of processing callchains at record or report time.

Sure!

> > s/perfconfig/.perfconfig
> > 
> > ?
> 
> It seems we can have a system-wide /etc/perfconfig too.  How about
> 'the perf config file' instead?

Yeah.

Thanks,

	Ingo
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