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Subject: Re: Some opteron results for Crafty

Author: Tony Werten

Date: 23:59:52 11/26/03

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On November 26, 2003 at 15:25:10, Robert Hyatt wrote:

>I have been working both with Eugene and AMD.  The following bench run is
>on a quad 1.8ghz opteron, 8 gigs of ram.

:) Did you consider loading the (interesting) 5 piece egtb's in RAM and adjust
the probing depth ?

Tony

>The only "option" I have set is
>"mt=4".  There is _no_ assembly code in this version, pure C only.  I am
>looking at updating the asm to 64 bit but that will take some time and
>studying.
>
>Meanwhile:
>
>Crafty v19.6 (1 cpus)
>
>White(1): mt=4
>max threads set to 4
>White(1): bench
>Running benchmark. . .
>......
>Total nodes: 105863114
>Raw nodes per second: 5881284
>Total elapsed time: 18
>SMP time-to-ply measurement: 35.555556
>
>This is using gcc, although I am not sure whether it is producing 64 bit
>or 32 bit code at the moment.  However, 5.8M nps is not bad.  About 1M less
>than Eugene's MSVC numbers.  I will look into the 64 bit stuff more to see if
>gcc is producing real opteron assembly or not...  And I will study the
>PGO options although the list time I tried them on GCC the compiler promptly
>crashed. :)
>
>Note that the above is with default hash and everything, no endgame tables,
>no opening book, etc...



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