Author: Vincent Diepeveen
Date: 10:52:51 02/19/05
Go up one level in this thread
On February 19, 2005 at 13:51:16, Vincent Diepeveen wrote: >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. ==> of course such things are only going to work if the machine is loaded with DIMMS. Putting in just 1 or 2 dimms is not a very good idea. Just completely fill it up. preferably 2-2-2 registered memory. Vincent >>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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