Subject: Re: Seti@Home never uses more than 50% CPU ???ATTN Mike Ober
From: "Michael D. Ober" <obermd.@.alum.mit.edu.nospam>
Date: 19/08/2004, 05:52
Newsgroups: alt.sci.seti

Hurrah,

I wish I had that computational power.  Set SETI Driver to 4.  You're
throughput will go up even though the time it takes to process a single WU
will go down.  Don't forget to up your cache size as well.  Also, don't
bother with the Affinity checkbox in your case.

Mike.

"Hurrah" <hurrah@not.here> wrote in message
news:BApUc.1924$PV7.23436319@news-text.cableinet.net...

"Michael D. Ober" <obermd.@.alum.mit.edu.nospam> wrote in message
news:8cSTc.23379$9Y6.19835@newsread1.news.pas.earthlink.net...
I agree with Martin that 512Kb L2 cache is insufficient to run multiple
WUs
simultaneously.  The problem is that the client requires close to 500Kb
of
working memory.  Increasing this requirement will incur a major penalty
in
L2 cache misses.

Mike Ober.



Mike,

Sorry to jump in with a question, but can you help on two queries about
running SETI Driver + SETI CLI:

1) I have a file server PC with dual Pentium 3 Xeon 700MHz CPU's - each
has
1Mb L2 cache, which I have set to run 2 processes - currently the WU's are
processed in about 6 hrs each. So I get about * WU's per day.

Can this PC run more than 2 processes at the same time? Your implication
from this thread is that a single CPU with 1Mb or more L2 cache can run
more
than 1 process. Hence with a dual Xeon w/1Mb, can I run 4?

2) Have tried to find out if "set affinity" is of much use with a dual CPU
and had no luck finding out what benefits putting a "tick" in the box
actually does. Can you advise what it is meant to do?

rgds and thanx for a fine program in SETI Driver.

H.