linux-kernel - Re: [PATCH 2/8] perf tools: Make __hpp__fmt() receive an additional len argument

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Message-ID: <87r40nfo36.fsf@sejong.aot.lge.com>
Date:	Mon, 11 Aug 2014 17:05:33 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>, Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH 2/8] perf tools: Make __hpp__fmt() receive an additional len argument

Hi Arnaldo,

On Sat, 2 Aug 2014 10:30:26 -0300, Arnaldo Carvalho de Melo wrote:
> Em Thu, Jul 31, 2014 at 02:47:36PM +0900, Namhyung Kim escreveu:
>> So that it can properly handle alignment requirements later.  To do
>> that, add percent_color_len_snprintf() fucntion to help coloring of
>> overhead columns.
>
> Can you elaborate on this description? What is not possible to do before
> this patch?

This patch is a preparation that moves hard-coded print width out of the
format string so that it can be passed from external settings later.

>
> Perhaps a formatted line before this patch and then the same line
> formatted after the patch?

The default behavior wasn't changed, it's only meaningful when user
gives field width using -w option.  You can see the difference in the
description 0/8.

Thanks,
Namhyung
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