Author: Tom Kerrigan
Date: 10:56:01 03/24/04
Go up one level in this thread
On March 24, 2004 at 11:26:37, Slater Wold wrote: >On March 24, 2004 at 02:24:17, Russell Reagan wrote: > >>On March 24, 2004 at 01:57:28, Tom Kerrigan wrote: >> >>>The architectures of the Athlon XP and Opteron are very different. You can't >>>attribute a speed increase to being 64-bit. >>> >>>Much better would be to compare the performance of a program compiled for x86 >>>running on an Opteron vs. the same program compiled for AMD64 running on the >>>same Opteron. >>> >>>Even then, you won't be able to distinguish between the benefit of 64 bit >>>computations and the benefit of extra registers, but it's still closer to what >>>you want. >> >>True enough, but I think the overall difference is a good number also. If Crafty >>gets a 60% boost on the Opteron, and Diep (and other non-bitboarders) get a >>comparable boost, then it doesn't really matter why the boost occured. Wouldn't >>it be a shame if bitboards _still_ broke even on 64-bit hardware? :) That's one >>thing I'm interested in finding out. > >You'd be lucky to get 20% in a non-bb program. Actually, my program gets 25%. -Tom
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