Author: Robert Hyatt
Date: 20:35:01 02/07/04
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On February 07, 2004 at 22:03:25, Pham Hong Nguyen wrote: >I have seen that in CCT6 Crafty used only 386 MB for hash table on a machine >with 8 GB physical memory. Where did you see this? It isn't correct. I actually used 2x that much memory as you can see in the cct6 log files on my ftp machine... It means that a huge memory (at least 7 GB) is almost >redundant. I think in coming time, the situation will be worse: more physical >memory could not be used for chess engines. I have been thinking some ways of >using large size of memory and here may be one: load all 3-4 EGTBs into memory >(near enough - need little more memory or some selections of EGTBs). Thus, >instead of searching on HDD, we can search on memory. Some good programs (like >Crafty) can develop some methods to look up EGTBs not only in main search but in >qsearch. > >Just my two cents. :) >What do you comment? >+Pham Linux does this already. If you have extra memory, it will cache up the filesystem blocks quite readily to avoid doing additional I/O. That was one reason I avoided using all of memory for hash.
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