linux-kernel - Re: [F.A.Q.] the advantages of a shared tool/kernel Git repository, tools/perf/ and tools/kvm/

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Date:	Wed, 9 Nov 2011 09:55:10 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Arnaldo Carvalho de Melo <acme@...hat.com>
Cc:	Gerd Hoffmann <kraxel@...hat.com>, Theodore Tso <tytso@....edu>,
	Anthony Liguori <anthony@...emonkey.ws>,
	Pekka Enberg <penberg@...nel.org>,
	Vince Weaver <vince@...ter.net>, Avi Kivity <avi@...hat.com>,
	"kvm@...r.kernel.org list" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
	qemu-devel Developers <qemu-devel@...gnu.org>,
	Alexander Graf <agraf@...e.de>,
	Blue Swirl <blauwirbel@...il.com>,
	Américo Wang <xiyou.wangcong@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [F.A.Q.] the advantages of a shared tool/kernel Git repository,
 tools/perf/ and tools/kvm/


* Arnaldo Carvalho de Melo <acme@...hat.com> wrote:

> > sure the colors have enougth contrast so they are readable.
> 
> Problem is figuring out something that is considered a good default 
> :-\ There will always be somebody that will complain.
> 
> When doing the coding to allow using the default xterm colors I 
> tried several of the gnome-terminal xterm profiles and all looked 
> kinda sane for the "top" (hottest functions, with most hits) and 
> "medium" lines, where we combine some chosen foreground color 
> ("red" and "green").
> 
> Laziest solution would be: If the user customizes that much, could 
> the user please customize this as well? :-)

I don't think it's acceptable to output unreadable color combinations 
(red on dark red, etc.) in any case, so we should add some safety 
mechanism that detects bad color combinations and a fallback, static 
color scheme.

I like the current way how perf top/report adapts to the xterm color 
scheme. I use it both on dark and white backgrounds and it's easy to 
mistake it for --stdio output - which is good, a good TUI should 
blend into the console's color scheme. So i think we should keep that 
and just detect the few cases where it results in something 
unreadable.

Thanks,

	Ingo
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