Author: Eugene Nalimov
Date: 15:47:27 03/17/03
Go up one level in this thread
I just run the experiment. I used 2 otherwise identical 64-bit systems, one with 3Mb of L3 cache, other with 1.5Mb. Machine with bigger cache run Crafty's "bench" comman 12% faster (1 CPU). That means that (1) Crafty's working set don't fit into 1.5Mb, (2) For systems with cache 1.5Mb or less (i.e. for almost all x86 systems) for Crafty memory speed matter. Thanks, Eugene On March 17, 2003 at 15:42:23, Tom Kerrigan wrote: >On March 17, 2003 at 15:23:02, Randall Shane wrote: > >>On March 17, 2003 at 14:34:49, Tom Kerrigan wrote: >> >>>On March 17, 2003 at 13:26:46, Robert Hyatt wrote: >>> >>>>the CPU is not the _only_ thing to look at. Memory bandwidth is another. A >>>>machine >>>>with a MB that supports interleaved memory will be somewhat faster, but >>>>generally somewhat >>>>more expensive as well. There are other issues too, of course. >>> >>>Do you have any evidence of this? Because last time we disucssed this, you >>>didn't... >>> >>>-Tom >> >>Tom, >>Which assertion in particular are you disagreeing with? >> >>-- Randy Shane > >That main memory speed affects the performance of chess programs. > >-Tom
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