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Daniel Shawul
Joined: 14 Mar 2006 Posts: 2187 Location: Ethiopia
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Post subject: Re: Is there a reasonable number of pawn hash entries? Posted: Thu Jul 12, 2012 2:41 am |
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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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pht 32768 X 24 = 0.8 MB
Nodes Time NPS splits bad
===== ==== === ====== ===
21620882 15.70 1377213 0 0
18107168 15.31 1182315 0 0
20899027 16.97 1231890 0 0
18887991 16.00 1180794 0 0
23305020 20.04 1162925 0 0
pht 65536 X 24 = 1.5 MB
Nodes Time NPS splits bad
===== ==== === ====== ===
21620882 15.59 1386754 0 0
18107168 16.09 1125437 0 0
20899027 17.50 1193889 0 0
18887991 16.13 1170912 0 0
23105001 20.03 1153692 0 0
pht 131072 X 24 = 3.0 MB
Nodes Time NPS splits bad
===== ==== === ====== ===
21620882 16.04 1347935 0 0
18107168 15.49 1169185 0 0
20899027 17.16 1217892 0 0
18887991 16.15 1169752 0 0
23005001 20.00 1150077 0 0
pht 262144 X 24 = 6.0 MB
Nodes Time NPS splits bad
===== ==== === ====== ===
21620882 15.79 1369190 0 0
18107168 15.30 1183475 0 0
20899027 16.96 1231963 0 0
18887991 15.99 1181090 0 0
23005001 20.01 1149732 0 0
pht 524288 X 24 = 12.0 MB
Nodes Time NPS splits bad
===== ==== === ====== ===
21620882 15.70 1377213 0 0
18107168 15.33 1181005 0 0
20899027 17.00 1229643 0 0
18887991 16.00 1180499 0 0
23105001 20.08 1150819 0 0
pht 1048576 X 24 = 24.0 MB
Nodes Time NPS splits bad
===== ==== === ====== ===
21620882 15.70 1376950 0 0
18107168 15.32 1181544 0 0
20899027 16.99 1230150 0 0
18887991 16.17 1167944 0 0
23105001 20.08 1150647 0 0
pht 2097152 X 24 = 48.0 MB
Nodes Time NPS splits bad
===== ==== === ====== ===
21620882 15.96 1354776 0 0
18107168 15.49 1169260 0 0
20899027 17.19 1215483 0 0
18887991 16.16 1168522 0 0
22305008 20.09 1110364 0 0
pht 4194304 X 24 = 96.0 MB
Nodes Time NPS splits bad
===== ==== === ====== ===
21620882 15.87 1362717 0 0
18107168 15.47 1170318 0 0
20899027 17.22 1214001 0 0
18887991 16.17 1168088 0 0
23105001 20.08 1150418 0 0
pht 8388608 X 24 = 192.0 MB
Nodes Time NPS splits bad
===== ==== === ====== ===
21620882 16.16 1338339 0 0
18107168 15.48 1169713 0 0
20899027 17.20 1215201 0 0
18887991 16.17 1167871 0 0
23005001 20.01 1149502 0 0
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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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