Author: Stefan Meyer-Kahlen
Date: 03:05:12 04/12/00
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On April 11, 2000 at 03:28:03, Jeremiah Penery wrote: >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. Did you use Shredder or Crafty for your tests? Stefan
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