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Date: Fri, 20 Apr 2001 14:23:30 -0700
From: Fabio Riccardi <fabio@chromium.com>
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To: mingo@elte.hu
CC: Zach Brown <zab@zabbo.net>,
        Linux Kernel List <linux-kernel@vger.kernel.org>,
        "David S. Miller" <davem@redhat.com>,
        Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: numbers?
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Ingo Molnar wrote:

> > On a Dell PowerEdge 1550/1000 the published TUX 2 result is 2765.
> >
> > If you take into account the fact that the 1550 has a faster processor
> > (1GHz) and a more modern bus architecture (Serverworks HE with memory
> > interleaving and a triple PCI bus), the performance is roughly the
> > same.
>
> the system was IO-limited (given that a ~9 GB fileset was running on a 2
> GB RAM system), so CPU speed has not a big impact. I'd say it makes no
> sense to compare different systems.

>From what I've seen the major impact comes from the disk IO bandwidth to
memory size ratio and from the PCI bus to memory bandwidth.

I agree that comparing different hardware architectures is a tricky business,
but you asked me to comment on some of the comparisons that you made...

> > The static pages work fine, the dynamic module gets executed, but for
> > some reason it fails to open the postlog file and to spawn the spec
> > utility tasks at reset time.
>
> the newest TUX code chroots into docroot, so you should either use "/" as
> the docroot, or put /lib libraries into your docroot.

Oh, the docs don't mention anything of that... I'll try to set the docroot as
you say

> > I'll make an alpha release of X15 available for download by the end of
> > next week, so people will be able to test it independently.
>
> (will source code be available so we can see whether it's an apples to
> apples thing?)

I'll release the source for the SPEC dynamic code dll, which indeed is just a
straight porting of the TUX dynamic code from the SPEC site.

 - Fabio


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