Go Back > New To GIMPS? Start Here! > Information & Answers

Thread Tools
Old 2013-06-15, 00:30   #1
philmoore's Avatar
Sep 2002
Tracktown, U.S.A.

3·373 Posts
Default Core affinity question

I have been running two workers in Prime95 on a Core i3-2100 running under Windows 7, but I am now reducing that to one worker so that I can run one core on Prime95 and the other core doing stage 2 ECM with GMP-ECM on curves that had the first stage 1 run with Prime95. I started both programs, then used the Task Manager to set the affinity to Core 1 and Core 2 for GMP-ECM and to Core 3 and Core 4 for Prime95. (These are "logical cores" under hyper-threading, the Core i3-2100 has only two physical cores.) Both programs show up at 25% core usage, which I understand is normal for computers running hyper-threading, but I wonder if there is a better choice. This is a work computer, and I am not allowed to change the BIOS settings, but is there a simple way to turn off the hyper-threading that would result in increased efficiency? Or is it fine just to let it run as is? Thanks in advance.

I see that this is my 1000th post. I had been trying to avoid this milestone, but every so often I get carried away and post against my better judgment! Last post was 3^3*37, this is 2^3*5^3.

Last fiddled with by philmoore on 2013-06-15 at 00:35 Reason: Added parenthetical remarks
philmoore is offline   Reply With Quote
Old 2013-06-15, 22:42   #2
Mr. P-1
Mr. P-1's Avatar
Jun 2003

22218 Posts

Originally Posted by philmoore View Post
I see that this is my 1000th post. I had been trying to avoid this milestone...
Mr. P-1 is offline   Reply With Quote
Old 2013-06-16, 05:44   #3
prgamma10's Avatar
Jan 2013

109 Posts

Originally Posted by Mr. P-1 View Post
Aliquot, maybe?
prgamma10 is offline   Reply With Quote

Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Question about multi-core prime searching. Trilo Riesel Prime Search 33 2013-09-19 21:21
Core i5 2500K vs Core i7 2600K (Linear algebra phase) em99010pepe Hardware 0 2011-11-11 15:18
exclude single core from quad core cpu for gimps jippie Information & Answers 7 2009-12-14 22:04
Optimising work for Intel Core 2 Duo or Quad Core S485122 Software 0 2007-05-13 09:15
Question about RAM usage for dual-core for OPN's main effort. jasong GMP-ECM 18 2006-07-17 00:23

All times are UTC. The time now is 03:53.

Sun May 9 03:53:19 UTC 2021 up 30 days, 22:34, 0 users, load averages: 1.50, 1.70, 1.66

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.