Author: Jeremiah Penery
Date: 00:28:03 04/11/00
Go up one level in this thread
On April 10, 2000 at 20:28:50, Robert Hyatt wrote: >On April 10, 2000 at 10:00:40, Stefan Meyer-Kahlen wrote: > >>On April 10, 2000 at 09:00:39, Robert Hyatt wrote: >> >>>On April 10, 2000 at 06:10:22, Jouni Uski wrote: >>> >>>>Has anybody found good values for TB cache with 3+4 piece tablebases and 5 piece >>>>set (compressed Nalimov of course)? Is it different? Or is 4 MB always enough? >>>>Is same value good under Fritz and Winboard? thanks >>>> >>>>Jouni >>> >>> >>>Here is what I do on a machine with decent memory, assuming I am playing in >>>a tournament that is playing long time controls: >>> >>>memory=512mb >>> >>>hash=384M >>>hashp=32M >>>cache=32M >>> >>>which leaves 64M for the O/S and filecache buffers. >>> >>>works well for me. In general, egtb cache is only important in egtb positions, >>>but then it is very important for performance. >> >>I haven't seen much difference for Shredder if I set the tb cache to 1 or 32 or >>256 MB. Any comments? Try analyzing a position with, say, KRBKRN and try different settings for cache. With 1MB, you'll get tons of probes, and contine to get tons of probes. With 256MB, you'll get tons of probes, and then you'll start to get a bunch less pretty soon. (At least this is what should happen...) >Depends on the position... I ran several tests last year when Eugene first got >this stuff going, and I decided that for ICC level time controls, 32mb was a >good number. I rarely see my NPS drop drastically. It all depends on the >position and how many different databases are getting probed... As well as the speed of your HD. I've started using 48MB for cache, and it speeds up dramatically over lower amounts, even though I still get tons of probes sometimes. If I'm analyzing a position with about 7-8 pieces, with lots of possible transitions into 5-piece endings, I might even put the cache higher, because (on my machine) it speeds up the search a ton.
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