mersenneforum.org  

Go Back   mersenneforum.org > Other Stuff > Archived Projects > NFSNET Discussion

 
 
Thread Tools
Old 2005-06-11, 12:18   #1
jasong
 
jasong's Avatar
 
"Jason Goatcher"
Mar 2005

3·7·167 Posts
Default How does a 500MHz K6 do on this project?

I know it won't exactly scream along, but I'm looking for somewhere I can do well. Clock-for-clock, if not anything else.
jasong is offline  
Old 2005-06-11, 13:40   #2
xilman
Bamboozled!
 
xilman's Avatar
 
"π’‰Ίπ’ŒŒπ’‡·π’†·π’€­"
May 2003
Down not across

22×3×11×83 Posts
Default

Quote:
Originally Posted by jasong
I know it won't exactly scream along, but I'm looking for somewhere I can do well. Clock-for-clock, if not anything else.
Good question, to which I have no real answer.

Assuming it has enough memory (I wouldn't recommend running on a machine with less than 128M) it will undoubtedly do useful work. I've used 300MHz PII machines productively while at MSR.

The best approach, I suggest, is to suck it and see. Try running for a few days and see what happens. That would certainly be my approach if I had such a system.

Paul

P.S. The performance of NFS sievers tend to be much more correlated with efficiency of the memory architecture than the raw clock speed, so you may find that your machine out-performs on a clock-for-clock basis --- or you may not. Suck it and see remains my advice.

Last fiddled with by xilman on 2005-06-11 at 13:43 Reason: Added PS about memory
xilman is offline  
Old 2005-06-11, 14:35   #3
Wacky
 
Wacky's Avatar
 
Jun 2003
The Texas Hill Country

32·112 Posts
Default

At one time, cycle for cycle, my 450MHz G4 tower was fastest in our group.
It certainly wasn't all that fast in terms of overall throughput since its clock was less than 1/4th of the 2GHz of (at that time) "bleeding edge" machines.

However, at half the competitive speed, its memory to cpu speed ratio was twice as good.
Wacky is offline  
Old 2005-06-12, 17:46   #4
geoff
 
geoff's Avatar
 
Mar 2003
New Zealand

13·89 Posts
Default

Quote:
Originally Posted by jasong
I know it won't exactly scream along, but I'm looking for somewhere I can do well. Clock-for-clock, if not anything else.
I have a similar machine, I posted a few timings for different projects here, at the moment I have it looking for a factor of MM61 which is the only project that I could find where it matches a P3 clock for clock.
geoff is offline  
 

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Special project #3b - Project 400 schickel Aliquot Sequences 307 2011-10-28 01:29
Special project #3a - Project 300 schickel Aliquot Sequences 29 2011-08-12 17:45
pi(x) project ATH Miscellaneous Math 4 2006-08-30 17:59
New Project? edorajh NFSNET Discussion 1 2006-03-20 23:44
new project ? junky NFSNET Discussion 14 2004-06-03 08:59

All times are UTC. The time now is 05:34.


Mon Oct 25 05:34:30 UTC 2021 up 94 days, 3 mins, 0 users, load averages: 0.93, 0.96, 1.02

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.