Author: Moritz Berger
Date: 10:42:20 08/11/98
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On August 11, 1998 at 13:11:26, fca wrote: >>Higher NPS -> higher memory throughput -> less cache efficiency (just imagine a >>program that uses e.g. 64 KB hash and "lives" completely in the 512 KB 2nd level >>cache of a PII in comparison with Fritz which fills up hundreds of megabytes of >>hash tables in a couple of minutes). > >Put that way, seductive, Moritz. :-) > >But this case you conveniently quote is of course most highly and outrageously >unrepresentative. At important time controls (ssdf, 40/2 and similar) how many >programs only use <= 512Kb hash ! CST? > >So I cannot tell one way or the other... > >We are talking about programs that all consume significantly more than 512Kb >hash - some absurdly more (F5 seems like an engine to fill memory with some sort >of data! ;-) ) Very easy to verify: Just turn off 2nd level cache in your BIOS and see what happens. AFAIR Fritz was only about 30% slower without 2nd level cache, but I leave it up to you to post some exact data and correlate the effect on different programs. Moritz
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