Subject: Re: one MB and two MB L2 cache processors
From: f/f george
Date: 06/10/2004, 19:11
Newsgroups: alt.sci.seti

On Wed, 6 Oct 2004 14:57:03 +0100, John
<fredclark@consltec.demon.co.uk> wrote:

In article <oii7m01neeqbti8fqsnnjf7d7vfffg347r@4ax.com>, f/f george
<george@yourplace.com> writes

It might be my set-up, but I have to diagree with you on this.

I have a Dual CPU mobo with 2x Xeon 700 MHz each with 1Mb cache.

Using SETI-Driver and Win 2000, I return Classic WU's in around 6 hr 45min
(avg) at a rate of 8 per day.

Thats with 4 processes going on (via SETI driver). Switching back to 2
processes doesn't reduce this through-put.


So, unless I've missed something, your suggestion doesn't work in practice
(though I'm prepared to be corrected if some-one can tell me why I cannot
realise say 16 WU's completed per day.

H.
I don't see where you disagreed? You are running 4 processes, two on
each of two different processors and each processor with 1 meg L2
cache. That makes 4 processes four your machine.


Agreed

What would be really interesting is a dual Xeon system with the new 800
MHz FSB CPUs, at say 3.4/3.6 Ghz, sporting 2 Mb L2 and HT on each CPU.

With this rig, SETI Driver could have 2 WUs set for each of the physical
CPUs, another 2 WUs set for each of the HT virtual processors and at
least another 2 WUs (or perhaps 4) set to make use of the 2 Mb L2 cache.

On such a system I would expect the individual CPU WU times to be about
5 hours. As the system could, potentially, have 8 WUs running at the
same time this would make the daily WU output about 38 from 1 machine.

What would be he price of such a beast?

I believe a more cost effective Intel system would be a 2.25 Ghz Pentium
M Centrino system with 2 Mb L2 cache. I understand these will crunch a
WU in about 2 hours, whether it has multiple WUs on or not. This system
(Laptop) can crunch 4 WUs at the same time, giving a daily output of -

       24/2 x 4 = 48 WUs.
I found this on www.pricewatch.com
Asus - Z91N-A20D

Asus Z91N Centrino Pentium M 2.0Ghz 2MB Cache 15 inch XGA w/DVD-CDRW
Combo 256MB DDR333 40GB 802.11b/g Win XP Home CD/Lic. Carry Case
Dealer # - ASU-Z91N-A20D TotalCost - $1756
Price - $1735
Shipping - $21Flat
888-269-8868
732-346-9500 Edison NJ   
Updated - 10/5/2004 12:50 PM 

and this:
Intel - 
Boxed Pentium 4 Processor Extreme Edition 3.2 GHz w/2MB L3 Cache
BX5D532PG3200F
P4EE 3.2GHz 800MHz System Bus .13 micron w/attached fan/heatsink
Socket 478
Dealer # - IC485 TotalCost - $1099
Price - $1099
Shipping - Free Shipping Rebate
888-297-7407
562-699-6998 Santa Fe Springs CA  
Updated - 8/23/2004 10:07 PM

The first is a whole laptop system, the second is ONE CPU ONLY!!!