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

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Date:	Wed, 20 Feb 2008 14:36:54 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, sandmann@...hat.com,
	tglx@...x.de, hpa@...or.com
Subject: Re: [PATCH] x86: add the debugfs interface for the sysprof tool

On Wed, 20 Feb 2008 22:44:29 +0100
Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:

> 
> On Wed, 2008-02-20 at 13:07 -0800, Arjan van de Ven wrote:
> > On Wed, 20 Feb 2008 21:58:42 +0100
> > Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
> > 
> > > 
> > > On Wed, 2008-02-20 at 11:26 -0800, Arjan van de Ven wrote:
> > > 
> > > > feel free to reinvent a whole GUI just to avoid a 200 line
> > > > kernel module. sysprof is here. it works. 
> > > 
> > > > the gui is REALLY nice.
> > > 
> > > I guess we have to agree to disagree here. Its plain useless from
> > > my POV.
> > 
> > that's fine. Different tools for different people. sysprof isn't
> > aimed at kernel developers.
> 
> That was speaking from userland days.
> 
> But you forgot the more important points about API and wild-growth of
> duplicate interfaces.

yes there's multiple interfaces. There are multiple interfaces *today*.
Oprofile/perfmon2 are very focused on CPU events and have complex interfaces,
sysprof has a much more simple interface (and yes, very specific to syspref)
that just focuses on samples.

Sadly, I think there's use for both, and forcing both into the same straightjacket is a mistake imo.


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