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Subject: Re: Simple quad-opteron test

Author: Robert Hyatt

Date: 20:48:26 12/03/03

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On December 03, 2003 at 19:54:45, Mike Siler wrote:

>On December 03, 2003 at 14:59:03, Robert Hyatt wrote:
>
>>===================== 1 seconds per position========================
>>average search depth..............         4.5
>>===================== 5 seconds per position========================
>>average search depth..............         5.6
>>=====================10 seconds per position========================
>>average search depth..............         4.6
>
>Why would the average search depth increase and then decrease as time increases?
>
>Michael




Parallel misbehavior.  Sometimes it finds a mate quicker with a parallel
search than without.  It is luck.  Or in the above case, note that the
average depth for 1 second was 4.5 plies, while for 5 it went up, then
for 10 back down.  Crafty stops when it finds mates, which keeps that
number pretty low for WAC which is pretty easy as a test set.



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