Author: Sune Fischer
Date: 19:51:43 12/03/03
Go up one level in this thread
On December 03, 2003 at 16:58:17, Russell Reagan wrote: >On December 03, 2003 at 16:35:46, Slater Wold wrote: > >>What's the speedup between 1, 2, and 4 CPUs? > >After they (Bob and Eugene) did the NUMA stuff for Windows, 4 cpus was like a >3.84x speedup. > >>Any idea on the speedup of going >>to 64-bit? > >Clock for clock, Crafty is about 60% faster on 64-bit hardware. IE a 2GHz >Opteron would run Crafty about 60% faster than a 2GHz 32-bit Athlon. Gian Carlo >reported that Sjeng ran 70% faster, clock for clock. The Opteron has lots of improvements other than the 64 bit thing, so it is still not exactly known what is contributing where for Crafty. I suspect Crafty would get a good speedup on a 32-bit Athlon too if it had 1 MB cache and more registers, this should somehow be factored out. Granted that's not easy to do, but if/when we manage to take a handfull of bitboard programs and compare their speedup to a handfull of non-bitboard programs, then we might get a better impression of how much the 64-bit thing is an issue on the overall. It is also possible that the first generation chess programs and compilers won't be optimal. First tests are often 'worst case' senarios. -S.
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.