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Subject: Re: hyper-threading at dual xeon 2.8Ghz

Author: Robert Hyatt

Date: 21:39:34 02/22/03

Go up one level in this thread


On February 22, 2003 at 02:54:21, Vincent Diepeveen wrote:

>On February 21, 2003 at 19:49:04, David Weber wrote:
>
>>what chess programs support hyper-threading
>
>DIEP, Crafty, Fritz.
>
>for fritz it speeds up 10% node count at 4 threads at a dual Xeon 2.8Ghz
>(compared to HT turned off and 2 threads), but chessbase didn't test yet whether
>it actually speeds up search depth (according to Mathias who operates fritz
>here).
>for shredder it does speed up the node counts but not search depth
>so it has SMT/HT turned off here at this tournament and runs with 2 threads at a
>dual Xeon 2.8Ghz here.


Did you make the necessary changes to spinlocks and spinwaits???




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