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

Author: Robert Hyatt

Date: 10:30:09 01/02/04

Go up one level in this thread


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.

>
>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...





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