Author: Chessfun
Date: 21:01:15 04/25/01
Go up one level in this thread
On April 25, 2001 at 23:32:01, Robert Hyatt wrote: >On April 25, 2001 at 15:49:58, Frank Quisinsky wrote: > >>Hi there, >> >>I gave Crafty 2 CPUs, see the np/s from Chess Tiger. >>The games will be replayed. >> >>:-(( >>Frank live ... >>I forgot to adjust "Thread = 1" in the options from Crafty :-( >> >>Best >>Frank > > >Ugh.. if that is on a dual, it will kill my program. I get two threads >going, tiger has a third, and that is bad. It is quite possible that I >was searching nothing much at all in some cases. > >The problem is that one thread might be sitting on a spinlock and running >while the other thread is not executing due to Tiger. That is just wasting >the second cpu. Crafty's parallel search _absolutely_ must have 100% of all >the processors you use it on... or it will die horribly. > >It doesn't like 'shared machines' for the parallel search. _ever_. It isn't >harmful for the serial search of course. But for the parallel search, it is >awful. Frank has been running this CCE tourney for months. He is running it on a dual computer. This is not a SMP crafty as far as I know nor is it meant to be. All programs have identical hardware a single cpu. Sarah.
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