mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Software

Reply
 
Thread Tools
Old 2007-11-11, 21:26   #12
nngs
 
nngs's Avatar
 
Jun 2004

1111002 Posts
Default

Quote:
Originally Posted by S485122 View Post
The credit FFT sizes are based on non SSE2 processors, they are a bit higher : cross over to 2560KB at 40250000, while in the program you find the cross over at 39500000.

Jacob
Thx for the explanation.

So people will feel their machines a little bit "slow down" (adding fewer P90 years) as they crunching in between 39500000 and 40250000
nngs is offline   Reply With Quote
Old 2007-11-14, 09:58   #13
davieddy
 
davieddy's Avatar
 
"Lucan"
Dec 2006
England

11001010010102 Posts
Default

Quote:
Originally Posted by nngs View Post
Thx for the explanation.

So people will feel their machines a little bit "slow down" (adding fewer P90 years) as they crunching in between 39500000 and 40250000
Yes. Best not to publicize this, or even more people will abandon
exponents in this range than are are doing so already
davieddy is offline   Reply With Quote
Old 2007-11-14, 21:34   #14
nngs
 
nngs's Avatar
 
Jun 2004

22·3·5 Posts
Default

Quote:
Originally Posted by davieddy View Post
Yes. Best not to publicize this, or even more people will abandon
exponents in this range than are are doing so already
What if M45 in that region?
nngs is offline   Reply With Quote
Old 2007-11-14, 23:58   #15
Kevin
 
Kevin's Avatar
 
Aug 2002
Ann Arbor, MI

433 Posts
Default

Quote:
Originally Posted by davieddy View Post
Yes. Best not to publicize this, or even more people will abandon
exponents in this range than are are doing so already
I'll get to them...eventually...=].

So one would be better off putting exponents in the range 39.5M-40.25M on an older CPU that doesn't have SSE2 (in terms of maximizing throughput)?
Kevin is offline   Reply With Quote
Old 2007-11-15, 07:16   #16
davieddy
 
davieddy's Avatar
 
"Lucan"
Dec 2006
England

2·3·13·83 Posts
Default

Quote:
Originally Posted by Kevin View Post
So one would be better off putting exponents in the range 39.5M-40.25M on an older CPU that doesn't have SSE2 (in terms of maximizing throughput)?
Yes. That would make the best of GIMPS resources, and result
in credit where it's due.
davieddy is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Is Moore's Law wrong, or is it wrong-headed (6th time around) jasong jasong 12 2016-05-27 11:01
PSP: 10 years old! Citrix Prime Sierpinski Project 1 2013-11-08 07:35
Six years ago today… Xyzzy Forum Feedback 4 2008-08-16 16:55
Assignments more than 2 years old?? robo_mojo PrimeNet 4 2008-07-23 23:32
4 years of search SPH Math 3 2008-06-19 11:52

All times are UTC. The time now is 23:13.


Sat Oct 23 23:13:51 UTC 2021 up 92 days, 17:42, 0 users, load averages: 1.30, 1.23, 1.16

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.