Author: blass uri
Date: 14:46:18 04/05/99
Go up one level in this thread
On April 05, 1999 at 09:34:57, Micheal Cummings wrote: > >On April 05, 1999 at 02:12:06, Paulo Soares wrote: > >>On April 05, 1999 at 00:48:11, Terry Ripple wrote: >> >>> If 16mb is more than enough for 40/2hr, then how much Hash Table Size would be >>>enough for playing Sudden Death Games of 60/S.D.,30/S.D.,15/S.D. and 5/S.D. >>> >>> Would it be better to use smaller Hash Tables for these Sudden Death Games and >>>if so, then what would be the best size to use? >> >>Terry, >> >>The equation below is used to calculate the minimum hashtables size, >>and it is in the manual of Fritz5. I believe that it serves for the >>CM6000. >> >> HT(Kb)=2.0*Pfreq(Mgz)*t(S) >> >> HT= hashtable size in Kb. >> Pfreq= clock speed of the processor in Mgz. >> t= average time avaiable per move in seconds. >> >>Examples: >>1. Processor with 200Mgz >> Control time=40/2- Average time 3min=180s >> >> HT=2.0*200*180=72000Kb= 72Mb >> >>2. Processor with 200Mgz >> Control time= Blitz(5min)- Average time=10s(esteemed) >> >> HT=2.0*200*10=4000Kb= 4Mb >> >>3. Processor with 400 Mgz >> Control time= 40/1- Average time=1.5min=90s >> >> HT=2.0*400*90=90000Kb= 90Mb >> >>The program, in some moves, will spend a bigger time than the average >>time, then I think that is always good to use a bigger hastable than >>the calculated for the equation above. >> >>Best regards, >>Paulo Soares, from Brazil. > > >Well Johann suggest that a hash table of no bigger than 16meg should be used for >CM6K. So I think you equation is off in the case of CM6K. I would not even >consider using a 90 hash table even on my PII 450. I think that he said it only for pentium200MMX and i f this is the case maybe a similiar formula can be for chessmaster but you should multiply the optimal hash of Fritz by 16/72 so you get for Processor with 200Mgz Control time=40/2- Average time 3min=180s HT=2.0*200*180*16/72=16000K=16Mb Uri
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