linux-kernel - Re: [PATCH 2/7] Simple Performance Counters: x86

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Message-ID: <Pine.LNX.4.64.0708011127490.22867@schroedinger.engr.sgi.com>
Date:	Wed, 1 Aug 2007 11:29:34 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Andi Kleen <andi@...stfloor.org>
cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/7] Simple Performance Counters: x86_64 support

On Wed, 1 Aug 2007, Andi Kleen wrote:

> > But then the numbers are not comparable across systems.
> 
> That would only matter if you're interested in absolute system
> performance of different systems.

Yes I am definitely interested in seeing which type of cpu runs a certain 
section faster.

> If you want absolute comparable system performance benchmarks I don't think
> micro-instrumenting the kernel is a good approach.

It is certainly interesting to compare alternative ways of handling the 
instruction streams by various processors or models of processors.
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