Author: Vincent Diepeveen
Date: 10:51:16 02/19/05
Go up one level in this thread
On February 19, 2005 at 13:14:20, Eugene Nalimov wrote: >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. You must put it at 64 bits and not 128 bits indeed. 128 bits gives bigger bandwidth but is very poor for chess. >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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