Author: Matthew White
Date: 18:44:26 11/19/03
Go up one level in this thread
On November 18, 2003 at 14:30:09, Andreas Stabel wrote: >On November 18, 2003 at 11:17:01, Will Singleton wrote: > >>On November 18, 2003 at 10:35:40, Andreas Stabel wrote: >> >>>On November 18, 2003 at 09:51:29, Robert Hyatt wrote: >>> >>>>On November 18, 2003 at 09:17:09, Andreas Stabel wrote: >>>> >>>>>I've got a strange problem with my computer. >>>>>I'm running a 3GHz machine with 1GB memory and Windows XP Professional. >>>>>The machine is hyperthreaded, but my versions of Crafty and Ruffian are >>>>>single threaded. >>>>> >>>>>When I start analysis the machine runs with full speed, but already after >>>>>ca. 4-5 mins. it is running with the speed of a 2GHz machine and it is >>>>>still slowing down. >>>>> >>>>>I also noticed that it runs the same programs with big variations in speed. >>>>>I've tried stopping all other programs and turning off virus checking, but >>>>>nothing seems to help. >>>>> >>>>>I've upgraded from XP Home to XP Professional - I don't know if that is >>>>>releveant. >>>>> >>>>>Anybody got an idea how to help fix my problem ? >>>>> >>>>>Best regards >>>>>Andreas Stabel >>>> >>>> >>>>If you disable hyper-threading, do you still see this? SMT can make the >>>>CPU appear slower, because it makes it look like two CPUs. The sum total >>>>of the computing power of both logical CPUs is greater than a single physical >>>>CPU. But one of those logical CPUs will certainly appear slower than the real >>>>CPU... >>> >>>Thank you for the tip, but I don't think it is a hyperthreading problem. >>>The thing is that the computer runs slower than a single-cpu (no hyperthreading) >>>2 GHz machine. I've also compared with another computer of the same kind, which >>>run with normal speed, so there is something wrong with my computer. >>> >>>Best regards >>>Andreas Stabel >> >>I have noticed that running win 2003 (maybe like XP pro?) results in slower >>execution, after time, than XP. I don't know if XP is doing something with >>cache that 2003 isn't, or what. Is your other machine also running XP pro? >>Have you checked the performance settings (optimize for app performance rather >>than system)? >> >>Will > >My computer is exactly like the other one I tested. The only difference is >that one has XP Pro installed from scratch. The slowdown is really dramatic - >a factor of three or so. > >The program I use to test just runs a simple program which only use CPU. >I have also compared the time Crafty and Ruffian use to evaluate a certain >position to a given ply. All show the same slowdown. > >Regards >Andreas I'm not sure if it will make a difference, but you will want to make sure that System Restore is disabled for optimum performance. There is a tab in the System control panel which allows you to do it. It causes a great deal of disk access which will certainly hurt performance. Matt
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.