Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Intel Hyperthreading and Ponder (Permanent Brain)

Author: Juergen Wolf

Date: 12:56:36 01/02/04

Go up one level in this thread


On January 02, 2004 at 13:30:09, Robert Hyatt wrote:

>On January 02, 2004 at 09:57:38, Jasmine Baer wrote:
>
>>I've seen it written that under the following conditions:
>>
>>1.  Engine vs. Engine match or tournament
>>2.  Held on a single computer with a single processor
>>
>>having ponder=ON(or Permanent Brain in the Fritz GUI) will impact the play of
>>the engines since the each individual engine would not have full access to the
>>processor during its own turn.
>>
>>First, is this true?
>
>yes.  Since both engines are running, each should get about 1/2 the
>computational cycles.

usually yes, if the priority-level is controlled by the GUI and not
overwritten by the engine. i just want to mention this as i have seen
one (weaker) engine resetting the priority-level.


>
>>
>>Second, is this issue, if it actually is an issue, something that is eliminated
>>by running a two-processor system?
>
>Partially.  What about engines that can use _both_ processors?  :)
>
>
>
>>
>>And, finally, does anyone have any solid insight on how ponder=off/on or
>>Permanent Brain works on a Pentium 4 with Hyperthreading?
>>
>>Thanks.
>
>
>Same way.  PIV with SMT on looks like two slower processors...



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.