Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: HyperThreading & Comp v Comp matches

Author: Ray Banks

Date: 09:34:33 11/22/04

Go up one level in this thread


On November 22, 2004 at 12:28:37, Jason Kent wrote:

>On November 22, 2004 at 12:11:58, Steve Maughan wrote:
>
>>Bob,
>>
>>Thanks for the reply
>>
>>>It is difficult for _any_ program to figure out what is going on, since
>>>hyper-threading makes the O/S think there are two equal CPUs, when there
>>>really is not...  for engine vs engine you should turn it off in the BIOS...
>>
>>I tried to turn it off in the Bios and it didn't seem to be possible.
>>
>>Steve
>
>I've run tournaments with and without HT.  Don't use multi-processor engines
>(shredder, deep fritz, etc.) with HT on.
>
>There is a setting in my BIOS that lets me turn HT on and off, maybe you missed
>the setting when you checked.

I had the same dilemma. I could turn HT off in the BIOS but didn't want to. It
is too good a feature for general use that you don't want it to turn it off.
The easy way is on the dual processor capable engines to simply alter the engine
parameters to only use 1 thread or processor. That is how I'm running my P4
tournament. So Shredder, Fritz show as 50% useage the same as the single
processor engines like Pro Deo, Ruffian etc





This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.