Author: Eugene Nalimov
Date: 10:14:20 02/19/05
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On February 19, 2005 at 13:03:23, Mike Byrne wrote: >hoping to compile Crafty numa aware ... Under Windows default Crafty is NUMA-aware. It asks Windows, and if Windows says "system is NUMA", Crafty binds threads to the specific CPUs and allocates memory to optimize performance. I suspect that your BIOS reports to Windows that system is SMP. I vaguely remember that when I worked with Opterons I had to modify two BIOS settings before it configured itself as NUMA -- one is called "Interleaved memory", and I had to turn it off, and I cannot recall the second one. Thanks, Eugene >so far here is the best crafty 19.19 bench mark I have obtained under 19.19 ... > >crafty64 19.19 >dual opteron 244 >oc 2.1 Ghz >default hash > >Total nodes: 117483081 >Raw nodes per second: 4195824 >Total elapsed time: 28 >SMP time-to-ply measurement: 22.857143 > >big hash saves ~14% in time, although 1.5% slower nps, it reduces the nodes >search to reach the given depths by 17%, saving 4 seconds > >Crafty version 19.19 >hash table memory = 384M bytes. >pawn hash table memory = 96M bytes. >White(1): bench >Running benchmark. . . >...... >Total nodes: 99323178 >Raw nodes per second: 4138465 >Total elapsed time: 24 >SMP time-to-ply measurement: 26.666667 >White(1): info
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