[lug] Really off topic

[Ferdinand P. Schmid]

Wasn't there a time when AMD processors were slow with floating point
operations.  I seem to remember that maybe with the K6-3, but definitely with
the Athelon they resolved this issue.  Intel CPU's have always been very
focused on floating point operations, which helps with FFT but doesn't really
matter for everyday work in regular desktop apps.

Ferdinand

Viggy wrote:

> My initial gut reaction is that perhaps the software is compiled to take
> advantage of the Intel processor itself.  I think all P2's are MMX.
> Perhaps the s/w is using the MMX extensions, and on the AMD it is not (I
> don't think that the AMD has the MMX extensions, just their own 3D Now
> extensions).
>
> Viggy
>
> > -----Original Message-----
> > From: lug-admin at lug.boulder.co.us [mailto:lug-admin at lug.boulder.co.us]On
> > Behalf Of Whit Morrison
> > Sent: Thursday, February 24, 2000 5:59 PM
> > To: lug at lug.boulder.co.us
> > Subject: [lug] Really off topic
> >
> >
> > I know this doesn't relate to Linux, but I don't think I could find a
> > more knowledgeable group to put this question to.  I am running an AMD
> > K6-2 400 with 64 meg at home, at work Im using a pentium II 266 64 meg
> > running win NT 4.  I started processing data from seti at home at work, and
> > it took ~ 15 hours per work unit.  I thought it would be neat to see
> > what it would do on my home machine (on both Linux and NT). I was
> > disappointed to say the least... the AMD running NT took 25 hours, and
> > running Linux it took ~ 14 hours.  As I understand they are doing a
> > fourier analysis on the data.  Now with all that out of the way... does
> > anyone know why the AMD might perform so poorly?
> > It seems to everything else pretty well.
> >
> > Hope I didn't upset to many with this question.
> >
> > Whit
>
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--
Ferdinand Schmid
(Staff Engineer)

Architectural Energy Corporation
http://www.archenergy.com
2540 Frontier Avenue, Suite 201
Boulder, CO 80301
Phone: (303) 444-4149
Fax: (303) 444-4304
e-mail: mailto:fschmid at archenergy.com