Author: Alex Szabo
Date: 14:39:21 12/06/03
Go up one level in this thread
On December 06, 2003 at 13:30:55, Uri Blass wrote: >On December 06, 2003 at 12:31:41, Alex Szabo wrote: > >>On December 06, 2003 at 11:22:15, Alex Szabo wrote: >> >>>My self-play experiment between crafty versions 19.6 and 17.14 resulted in the >>>19.6 version being stronger by 11 (plus or minus 2) rating points. >>> >>>The experiment was for 20,000 games at a 20+1 time control. It was run on a >>>2x2GHz pentium4 linux system with xboard 4.2.6. I can include other details if >>>there is interest. >> >>Here are some more details: >>(1) 4 matches were run at the same time >>(2) pondering was on (ie normally 8 craftys were competing for CPU time) > > >8 crafties on one cpu? That's 8 craftys on 2 CPUs. >I wonder if we can trust the results. > >Do all crafty use the cpu all the time? Yes, once everything is running. In the long run some game is always ending and a new one starting, so the average load is 7.5 (not 8). > >I will be happy to do matches on one cpu with ponder on if I have a way to force >the engines to use only half of the cpu even if the opponent waits. > >If there is a tool to force engines to use half of the cpu then it will be good >to use it for games. > >The tool should notice if one of the engines does not use half of the cpu and >immediately use it in case that the engine wait because of having no move to >ponder or finding a forced mate. > >I do not know the exact changes from 17.14 to 19.6 but if one of the changes >means that a problem of not pondering in rare cases is corrected then the result >is not reliable. > >In your case you need a tool to tell the 8 engines to use not more than 1/8 of >the cpu time but I am going to be happy even with having something that tell the >engines always to use not more than 1/2 of the time when the tool use the rest >of the cpu time if it does not happen. > >Uri Linux seems to load balance just fine.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.