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Date: Tue, 12 Dec 2000 08:27:31 -0200 (BRDT)
From: Rik van Riel <riel@conectiva.com.br>
To: Steven Cole <elenstev@mesatop.com>
cc: linux-kernel@vger.kernel.org, vii@penguinpowered.com,
        mojomofo@mojomofo.com
Subject: Re: UP 2.2.18 makes kernels 3% faster than UP 2.4.0-test12
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On Mon, 11 Dec 2000, Steven Cole wrote:

> Building kernels is something we do so frequently and this test
> is so easy to reproduce is why I performed it in the first
> place.  I think it may be as good a test of real performance as
> some of the more formal benchmarks. Comments anyone?

Just one comment.  You cannot use a kernel build to measure
other things than those subsystems which the kernel build
excercises.

Things you could measure with a kernel build:  scheduling (L2
cache efficiency), fork, readahead, cpu speed, framebuffer
speed (in the make dep phase) and maybe hard disk speed.

Things you cannot measure with a kernel build: networking,
swapping (unless you do a very big parallel build, and even
then it's questionable), raw IO speed (the kernel build is
latency sensitive, but doesn't need much throughput), ...

regards,

Rik
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