Author: Bo Persson
Date: 23:53:53 07/03/03
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On July 03, 2003 at 19:55:39, enrico carrisco wrote: >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. The problem is that the Opteron is positioned by AMD as the Great Big Xeon Killer! To live up to that, it should really also run existing programs at least as fast as a Xeon. If it takes a recompile, we could just as well go for an Itanic, or Alpha, or G5, or ... One problem with the Itanium is that it might be fast for native programs, but it runs old x86 programs slower than the original. The Opteron, on the other hand, has hardware support for 32-bit x86 code, so it runs it ... eh ... slightly slower than a P4/Xeon. Not good! Bo Persson bop2@telia.com
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