Author: Robert Hyatt
Date: 04:29:11 08/12/98
Go up one level in this thread
On August 12, 1998 at 06:59:14, Tom Kerrigan wrote: >On August 12, 1998 at 04:48:56, fca wrote: > >>I tend to agree with Bob - as you recall, the parentage of this discussion was >>my surprise that such a huge speed ratio for Junior existed between the P200MMX >>and P2/300, which others later attributed to L2-cache size/MHz. I disagreed. > >I didn't say L2 cache is the only reason it's faster. The P6 core is maybe >35-75% faster than the P5 core. I assume you knew this. I was just pointing out >that with the faster core and the faster L2 cache speed, the performance >difference you see is explainable. > >-Tom I also agree with the above. IE My P6/200 is faster than my P5/233/mmx. When I run Crafty on both, my P5/233/mmx clocks in at about 70% of the speed of my P6/200 machine. As I've said before, the P6/PII core logic is simply better with the instruction pool and speculative execution and register renaming and you-name-it. But hashing has little to do with how a program performs on either, due to the relative infrequency of hash probes compared to all the other stuff like move generation and positional evaluation...
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