Author: Ed Schröder
Date: 01:12:08 10/25/04
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On October 24, 2004 at 16:51:06, Ed Schröder wrote: >On October 24, 2004 at 14:14:29, Jouni Uski wrote: > >>Maybe this have something common with You problem. I have noticed, that UCI >>engines (specially Yace) sometimes run 25%(!) slower than normally under >>Fritz7. I discussed this with Dieter B: but we never cleared the reason. >> >>Jouni >> >>PS. Another bug in Fritz GUI still there with latest Fritz8: UCI parameters are >>not used always only occasionally (depends which engine is loaded first)... > > >Jouni, I hope to reply soon on this, if possible tomorrow. Need to check some >things first. > >Ed I had some informative talks with the ChessBase crew. They could not explain the phenomenon I addressed but they found the issue interesting enough to do some research themselves. On the issue of Yace and its loss in speed let me quote the words of Mathias Feist (with permission) as a whole: Quite some time ago I already wrote an article about that, but I don't remember where. I think it may have been some ChessBase Magazine. It's indeed a problem with processor time distribution. The foreground process gets considerably more processor time than the background processes. If you play two Fritz engines against each other, you won't have a problem because both are running in the same process. If you are running two UCI engines against each other, both have their own process and therefor no problems occur either. You have to watch out if you have a Fritz and an UCI/Winboard engine playing each other. Switching the processer time distribution to optimization for background processes would work, but generally it's not a good idea. It distributes processor time evenly and makes the computer hard to operate. The UCI engine will be running in the background. Now, if Fritz is in the foreground, the Fritz engine will receive more processor time. All you have to do is to push the GUI into the background after starting the match. The easiest way to do this is to open the task manager and have it in the foreground (=title bar blue). Nice thing is that you can easily monitor processor time distribution this way, too, because the UCI engine appears in the process list together with Fritz. Mit freundlichen Grüßen Best regards Mathias Feist ChessBase GmbH ========= If I have understand his words correctly the solution would be to put the match directly after it has started on the taskbar. Cherio, Ed
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