Author: Tom Kerrigan
Date: 09:33:42 07/10/98
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On July 09, 1998 at 21:32:53, Robert Hyatt wrote: >My first benchmark on a PII/300 showed 1.41 times faster than a P6/200. That >missing .09 (20%) is caused by the 1/2 speed cache on the PII. If you take this The PII/300 has the same exact front side bus speed as the P6/200. A chess program is CPU *and* memory bound, so you can't expect performace to scale exactly with clock speed. >up to the PII/400, you begin to see a significant performance loss when compared >to a P6/200, factoring in the 2x faster clock not giving anywhere near 2x the >cpu performance. Xeon will. The 450 should clock in just as you'd expect with Your measurements simply prove that Crafty is very dependent on memory. Remember, the PII L2 cache *always* runs at half the core clock speed. If Crafty fit in L1/L2 cache, you *would* see a ~2x speedup. Cheers, Tom
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