Author: Slater Wold
Date: 08:26:37 03/24/04
Go up one level in this thread
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.
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