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

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Message-Id: <20080226092926.3a72f73b.akpm@linux-foundation.org>
Date:	Tue, 26 Feb 2008 09:29:26 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Anton Blanchard <anton@...ba.org>,
	Soeren Sandmann <sandmann@...mi.au.dk>,
	John Levon <levon@...ementarian.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

On Tue, 26 Feb 2008 10:02:23 +0100 Ingo Molnar <mingo@...e.hu> wrote:

> > 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.

Nobody has in any way demonstrated that this is due to the design or
implementation of oprofile's kernel component.
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