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

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Date:	Tue, 10 Dec 2013 11:11:17 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	linux-kernel@...r.kernel.org,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	David Ahern <dsahern@...il.com>
Subject: Re: [PATCH 0/2] perf tools: Add --header/--header-only options

On Tue, Dec 10, 2013 at 09:06:53AM +0900, Namhyung Kim wrote:
> Hi Jiri,
> 
> On Mon,  9 Dec 2013 11:02:48 +0100, 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:
> 
> Hmm.. I'm not sure it's OK to change the user-visible default behavior.
> At least we can provide help message for old users?

maybe we could display on the first line something like:
 
  $ perf report --stdio
  # To display data file header, please use --header/--header-only options.
  #
  # Samples: 12  of event 'cycles'
  # Event count (approx.): 3741156
  #
  # Overhead  Command      Shared Object                     Symbol
  # ........  .......  .................  .........................
  ...


jirka
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