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Subject: Re: SURPRISING RESULTS P4 Xeon dual 2.8Ghz

Author: Robert Hyatt

Date: 08:29:19 12/17/02

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On December 17, 2002 at 10:48:49, Vincent Diepeveen wrote:

>>>parallel search overhead, you have a problem on _normal_ SMP machines as well.
>
>Indeed it is true that the first seconds the HT/SMT gives big problems
>in speed. Only after a couple of minutes the speed shows. I see only
>a speedup after a minute or 3 each position.

So?  That is _your_ program's results.  Mine are just like they have always
been.  I get a reasonable speedup whether it is one second per move or one
hour per move.  No difference.


>
>I need to add however that i could improve a few issues in this version
>which could get that down to 1 minute but like you i doubt whether the 11.4%
>of HT is worth it.

11.4% is _always_ worth it IMHO...


>
>I prefer a dual AMD instead for the moment!
>


Nothing wrong with that.  I got the dual xeon because I wanted a chance to play
with the SMT stuff since it is obviously going to be "the future" of
microprocessor
architecture...








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