Author: Dann Corbit
Date: 10:24:03 04/03/01
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On April 02, 2001 at 22:39:57, Robert Hyatt wrote: >On April 02, 2001 at 16:40:38, Heiner Marxen wrote: >> >>I'm not so sure that this is always correct. >>When we throw enough cache memory at the EGTBs, such that cache misses >>become rare enough, EGTB probes will be fast on average. At some point >>they can be fast enough that it is worth it. > >I don't think you can throw enough memory at EGTB Cache to stop file I/O. >3-4-5 piece files would need over 7 gigs of memory. If you throw in the >already done 6's, you would need about 60 gigs... It seems unlikely that any board position would require caching them all. I suspect that a MRU cache of 4 gigs would add significantly to performance. Something around 4 times the size of the largest EGTB file. (Just a guess). I have not looked at the code for EGTB cacheing, but I have a nice cache algorithm that could be employed that might give a speedup if the method used is not too sophisticated. Memory is cheap: http://www.pcprogress.com/cart/memory.asp?OrderID=10102447231577700376510 Look at what you spend on CPU's and memory is one of the biggest bargains around. [snip]
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