linux-kernel - Re: [PATCH 0/2] perf tools: Add --header/--header-only options

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Date:	Tue, 10 Dec 2013 08:42:18 -0300
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	David Ahern <dsahern@...il.com>
Cc:	Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 0/2] perf tools: Add --header/--header-only options

Em Mon, Dec 09, 2013 at 04:25:29PM -0700, David Ahern escreveu:
> [Added Stephane given that he added the header output]

Yeah, I added him to the CC list in the patch when I merged it, Ingo had
asked me to do this quite some time ago, I also usually did:

$ perf report | grep -v ^#

When looking for the first few entries in a profile.

I think that with Namhyung's improvement to the man page + the single
line stating that --header should be used to get the previous behavior
we are ok, no?
 
> On 12/9/13, 3:02 AM, Jiri Olsa wrote:
> >Currently the perf.data header is always displayed for stdio
> >output, which is no always useful.

> >Disabling header information by default and adding following
> >options to control header output:
> >   --header      - display header information (old default)
> >   --header-only - display header information only w/o further
> >                   processing.

> I've been getting annoyed but that as well. Very useful on the first
> run; overhead after that.

> Acked-by: David Ahern <dsahern@...il.com>

I'll add this since I'll have to reprocess the last batch due to the
dso__delete problem.

- Arnaldo
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