linux-kernel - Re: [PATCH] x86: add the debugfs interface for the sysprof tool

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Date:	Tue, 26 Feb 2008 10:02:23 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Anton Blanchard <anton@...ba.org>
Cc:	Soeren Sandmann <sandmann@...mi.au.dk>,
	John Levon <levon@...ementarian.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	linux-kernel@...r.kernel.org, tglx@...x.de, hpa@...or.com
Subject: Re: [PATCH] x86: add the debugfs interface for the sysprof tool


* Anton Blanchard <anton@...ba.org> wrote:

> This surprises me. Can you please elaborate on why oprofile is "much 
> less useful" than sysprof?

see the thread you are replying to.

> Anton - who has used oprofile to analyse and tune databases, JVMs,
> 	compilers and operating systems. Maybe I've been missing out on
> 	the killer app for all this time!!!

it's OK if you use it full time and if you are amongst the 0.001% of the 
developer population we call "the best kernel hackers on the planet" ;-) 

It sucks badly if you use it occasionally and have to re-learn its 
non-trivial usage and its quirks every time. As it happens, most 
userspace developers are in this second category.

(and i'm not worried about the first category at all - if needed they 
can write their own OS from scratch ;-)

	Ingo
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