Author: Uri Blass
Date: 05:42:41 04/26/01
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On April 26, 2001 at 06:44:14, Frank Quisinsky wrote: >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. > >Hi Bob, > >since the latest Chess-Base "Native" versions of Crafty it is possible to set >under Engine options "Thread = 1 or 2" on dual machines. Default = Thread 2 on >Dual Machines. So I mus adjust Thread = 1 for Engine - Engine matches. > >Here I made a big mistake and forget to adjust Thread = 1 :-( >Christian Koch see this (not enough np/s for Chess Tiger in the games where I >have yesterday here posted). > >Sorry, I must replayed the games. > >BTW: >Thanks to Chessfun for his comments. Correction: her comments and not his comments Uri > >Best >Frank
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