Computer Chess Club Archives




Subject: Re: PONDER=ON and TableBases on 1 PC

Author: Dieter Buerssner

Date: 04:32:00 07/29/01

Go up one level in this thread

On July 28, 2001 at 04:06:42, Uri Blass wrote:

>On July 28, 2001 at 02:49:56, Dann Corbit wrote:
>>I have accidentally ran two programs in ponder on a single CPU machine.  Not
>>only do they both get blasted, but one is usually better at stealing cycles and
>>gets 70-80% of the CPU.
>It may be possible to prevent this problem by having a program that does not
>allow one engine to steal cycles.
>I understood that the chessbase interface tries to do it and if I understand
>correctly it does it better at longer time control(I never tried it so I do not

Hmmn - I have a totally different experience. When I run with ponder=ON on my
single CPU Win98 system under Winboard (or under Xboard and Linux), I get about
50% CPU time for both programs (and the few programs I tried). Under the Fritz 6
GUI, playing Firz vs. Yace, Fritz gets 80% CPU and Yace 20% CPU. Running
Tiger-Yace under CA6, Tiger gets 80% CPU and Yace 20% CPU.

Yace does not lower its priority, nor does it try steal any CPU-cycles.
This clearly shows, that on my computer, running under CB with ponder on is
almost useless.


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