Author: Robert Hyatt
Date: 18:58:50 01/23/04
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On January 23, 2004 at 21:45:25, enrico carrisco wrote: >On January 23, 2004 at 21:38:39, Robert Hyatt wrote: > >>quad opteron 2.2ghz (848's). 2.0gb ram per processor (8.0gb total). >> >>Using one 15K U320 scsi drive I shipped out there with the 3-4-5 piece >>endgame tables, no 6's. >> >>Machine is located at AMD in Austin, TX... >> >>Bob > >Can you post some benchmarks on this, Bob? Also -- have you done any (further) >64-bit optimization? > >-elc. Not particularly. I did write inline asm functions (64 bit versions) for the "big three" in Crafty. FirstOne(), LastOne() and PopCnt(). They only give a few percent in terms of speed however. Do you have a favorite position you'd like me to run? I have the machine set up for use until at least next Sunday night late (after CCT) so I can run a test position if you have a favorite. What I have mostly done for the AMD NUMA stuff is to try to eliminate most of the global data that is updated on the fly. Things like the history counts. I have also done some things such as shrink the attack tables by 75% as I reported a week or two or three ago. Other than that, the 64 bit stuff in Crafty was just waiting for this kind of hardware... Here is the bench output, using all 4 processors, for a reference: Total nodes: 84930980 Raw nodes per second: 7720998 Total elapsed time: 11 SMP time-to-ply measurement: 58.181818
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