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Subject: Re: OpteronCrafty playing on ICC for a few days

Author: enrico carrisco

Date: 16:55:39 07/03/03

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On July 03, 2003 at 19:32:37, Robert Hyatt wrote:

>On July 03, 2003 at 18:55:19, Brian Richardson wrote:
>
>>On July 03, 2003 at 18:26:33, Slater Wold wrote:
>>
>>>What are your results with your current exe, on the Crafty 'bench' test?
>>
>>                                        Elapsed SMP             Raw
>>                        Version CPUs    time    time-to-ply     NPS
>>Opteron 244 (1.7GHz)	19.03	2	28	22.857143	1976833
>>Opteron 244 (1.7GHz)	19.03	1	43	14.883721	1234812
>
>That leaves me pretty cold.  Dual 2.8ghz xeon, SMT on:
>
>Total nodes: 122846715
>Raw nodes per second: 2082147
>Total elapsed time: 59
>
>This is a different version (19.4) so the time is not really comparable,
>but the NPS is, and the xeon is faster than the opteron.  That looks ugly,
>although it obviously means the opteron is running 32 bit mode only, and it
>isn't very happy doing it.  Be nice to get real 64 bit boolean operations
>up and going.


I don't think it is a problem with the Opteron not being happy running in 32 bit
mode.  I see this no differently as when a regular Crafty revision is
benchmarked on a Athlon MP system and gets poor speed-up.  Once an AMD optimized
revision (such as Aaron Gordon's) is benchmarked on the same machine, the scores
will improve drastically.

Mr. Richardson, would you like to try a profile guided optimized version of
Crafty using the Intel C compiler? This has helped Athlon processors
substantially with Crafty and I believe it could also help the Opteron.

Contact Aaron Gordon at agordon@newageoc.com if interested. He's already agreed
to help and will provide a binary and instructions upon request.

-elc.



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