Author: Kai Lübke
Date: 01:56:15 01/08/98
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On January 08, 1998 at 01:42:58, Jouni Uski wrote: >Have anybody found good way to use TB dynamical? In my PC node speed >goes to 1/10 of normal, even if all TBs are moved to hard disk! So >it seems to be no sense to dynamical TB access. Is there special >hardware requirements (50 MB cache) to succeed or what? I have noticed some heavy slowdowns as well, but only occasionally. Typically, I get around 22000-28000 nps (P6-200) running with 60 MB hash under DOS 6.22. With heavy tablebase probing, this goes down to 8000 nps sometimes, on rare occasions to 3000 nps (but only for a few seconds). However, this may be due to the fact that I run it under DOS 6.22 - Crafty is also _very_ slow in tablebase access there (as low as 12000 nps compared to 40000 nps under DOS 7.0 minimum, 55000 nps typical with TB probing). Reason is probably the 16 bit disk access? Under Win95, I haven't noticed nps counts less than 15000, which is more than 50% of the usual speed. (All this is with the full 3/4 man set and a fast EIDE harddisk) --- Shep
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