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Fermin Serrano
Joined: 08 Feb 2008
Posts: 509
Location: Madrid - Spain
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 Post subject: Re: Is there a reasonable number of pawn hash entries? Posted: Mon Jul 16, 2012 1:47 pm |
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| lucasart wrote: |
| Kempelen wrote: |
| Daniel Shawul wrote: |
I did a test on 5 bratko kopec positions for 20 secs each. There is almost no improvement from additional pawn hash entries. The smallest number of entries I tried was 32k ~ 0.8MB and it is so far the best. Look at the nps figure for each of the positions below. Ofcourse the result will depend on time control used. I think smaller pawn hash table is good idea as most of it can reside in cache.
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After doing some tests I arrive to conclude that 65535 entries is the best for my engine fast games. |
Surely you mean 65536 ? If it's not a power of two you'll have to do a dichotomic search which is a waste of time. I also use 0x10000 = 65536 pawn hash entries. |
Yes, I wanted to mean that.
_________________
Fermin Serrano
Author of 'Rodin' engine
http://sites.google.com/site/clonfsp/
http://clonfsp.wordpress.com |
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| Subject |
Author |
Date/Time |
 Is there a reasonable number of pawn hash entries? |
Fermin Serrano |
Tue Jul 10, 2012 9:24 pm |
| Re: Is there a reasonable number of pawn hash entries? |
Robert Hyatt |
Tue Jul 10, 2012 11:20 pm |
| Re: Is there a reasonable number of pawn hash entries? |
Lucas Braesch |
Fri Jul 13, 2012 4:08 am |
| Re: Is there a reasonable number of pawn hash entries? |
Vincent Diepeveen |
Sat Jul 14, 2012 9:54 am |
| Re: Is there a reasonable number of pawn hash entries? |
Vincent Diepeveen |
Tue Jul 10, 2012 11:49 pm |
| Re: Is there a reasonable number of pawn hash entries? |
Daniel Shawul |
Thu Jul 12, 2012 2:41 am |
| Re: Is there a reasonable number of pawn hash entries? |
Fermin Serrano |
Mon Jul 16, 2012 12:03 pm |
| Re: Is there a reasonable number of pawn hash entries? |
Lucas Braesch |
Mon Jul 16, 2012 1:06 pm |
| Re: Is there a reasonable number of pawn hash entries? |
Fermin Serrano |
Mon Jul 16, 2012 1:47 pm |
| Re: Is there a reasonable number of pawn hash entries? |
Daniel Shawul |
Tue Jul 17, 2012 11:18 am |
| Re: Is there a reasonable number of pawn hash entries? |
Marcel van Kervinck |
Sat Jul 14, 2012 10:46 am |
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