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Subject: Re: CraftyK7 v18.12 updated with OpenMP, faster SMP.

Author: Chris Taylor

Date: 08:15:09 10/28/01

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On October 28, 2001 at 04:46:02, Aaron Gordon wrote:

>Hey guys. Been tinkering around a bit more with the Intel C 5.0 compiler, messed
>with the -Qopenmp option. Turns out it may have done the trick. Slater Wold says
>he got about a 200kn/s increase over my older CraftyK7 18.12. I profiled it with
>MMX now also, seems slightly faster with a single cpu as well. Here's slate's
>Dual AthlonXP 1.53GHz (1800+) benchmarks with the 'test' version of this (this
>verion is %2 faster than the one he got 200kn/s more on).
>
>Total nodes: 118647746
>Raw nodes per second: 1501870
>Total elapsed time: 79
>SMP time-to-ply measurement: 8.101266
>
>Anyone else out there with dual Athlon/Thunderbird/Durons, etc please try this
>version out. Would like to see how much faster it is with dual cpu's. Also
>interested to see if it helps on intel cpu's. Thanks.
>
>You can grab it at ftp://65.10.79.9/pub/crafty/c1812-k7.zip
>(if you're using a single cpu and downloaded this in the past it wouldn't hurt
>to get it again, slightly faster).
>
>The reason I decided to try that compiler flag is I think I remember hearing
>Hyatt say something about using OpenMP, not sure. So far so good <crossing
>fingers> :)
>
>Oh, if anyone wants the optimized Sjeng11 for K7's, here ya go.
>ftp://65.10.79.9/pub/chess/sjeng11-k7.zip
>Seems to be about 15% faster than Dan Corbits binary.

Just using the total elapsed time as examples..........

Wcrafty 1812 153

WcraftyK7-1812 150

This newest compile
WcraftyK7-1812 146

Executed without rc file on a 1200AMD..and with browsing at the same time.
Can't wait till I can rip these 1200 chips out and replace them with, faster
stuff!!

Chris Taylor



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