Author: Tony Werten
Date: 00:50:31 06/14/01
Go up one level in this thread
On June 14, 2001 at 03:14:04, Uri Blass wrote: >On June 14, 2001 at 02:55:02, Tony Werten wrote: > >>On June 13, 2001 at 11:49:35, Ed Panek wrote: >> >>>On June 13, 2001 at 11:00:11, James T. Walker wrote: >>> >>>>On June 12, 2001 at 20:44:58, Ed Panek wrote: >>>> >>>>>Athlon 1.3Ghz 192 MBhash tables.. >>>>> >>>>>14:16:34.9 -0.50 25 -1715898192 >>>>>07:27:40.6 -0.44 24 -344954985 >>>>>00:00:31.9 -0.42 14 13011609 >>>>>00:12:59.1 -0.36 20 339922649 >>>>> >>>>>Same position PIII 800 48 MB HASH tables >>>>> >>>>>17:57:26.9 -0.44 24 -1100754853 >>>>>00:00:45.8 -0.42 14 13392336 >>>>>00:23:58.1 -0.36 20 436641487 >>>>>Bigger difference than I thought >>>>> >>>>> >>>>>This is from the current Gt2 vs the web position >>>>> >>>>> >>>>>Ed >>>> >>>>Hello Ed, >>>>I have no idea what your numbers above mean but it seems to me that if you want >>>>to compare processor speed you need to use the same amount of hash memory. I >>>>can't get to the game to see what the position is like but if it's close to an >>>>endgame or deep into an endgame the hash tables can make a very big difference. >>>>Jim >>> >>> >>>Hi Jim thanks for the reply..typically in computer chess the above means >>> >>>time-score-depth-nodes >> >>Then what does the - mean ? > >The last column does not mean number of nodes. > >It mean that value of an integer variable that is called nodes. > >This variable can get values between -2,147,483,648 and 2,147,483,647 and is >updated by the C commands nodes++; > >nodes++ does not mean always increasing the value of nodes by 1 and when >nodes=2,147,483,647 and you do nodes++ you get -2,147,483,648 That makes the comparison quite useless. ie pos 2 If the counter went around once then 2^32-344954985 positions are searched in 26860 seconds wich means 147 Kn/s wich is too low in the endgame on 800Mhz. So it went round more than once. How often ? If normal speed is 800Kn/s it went around 6 times. On a 1.3 Ghz speed is different and so is the number of times the counter went around. I'd know how often, if I would now the speed, but that would make the test unnescessairy. Tony > >Uri
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