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Re: [Bug-gnubg] GNUbgW speedingup50%

From: Joern Thyssen
Subject: Re: [Bug-gnubg] GNUbgW speedingup50%
Date: Wed, 26 Jun 2002 14:19:19 +0000
User-agent: Mutt/

On Wed, Jun 26, 2002 at 04:15:45PM +0200, Øystein O Johansen wrote
> > You should be careful. Perhaps we only want to start new
> > treads at the top level, otherwise we may end up starting
> > 441 threads for a 2-ply evaluation.
> Yes, exactly! We want only 21 threads. I've thought about
> this. I'm still just playing around and I'm not sure where
> this experiment ends up.
> > I'm looking at multi-threading rollouts. Currently I'm just
> > playing around with pthreads.
> Sounds like you're at the same stage as me. Multithread
> rollout? One thread each game?

Yes, but at most n threads (where n is a user-defined parameter,
typically the number of processors in the computer).

> > And as Rob suggested we may perform analysis on the fly
> > in the background.
> Yes, and another thing: Computer chess programs have the
> feature of "thinking" while it is the oponenents turn.
> (Called "plundering" i believe) This could improve the
> speed of the online players at least.

Yes, that could be interesting. 


Joern Thyssen, PhD
Vendsysselgade 3, 3., 9000 Aalborg
+45 9813 2791 (private) / +45 2077 2689 (mobile) / +45 9633 7010 (work)

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