Author: Will Singleton
Date: 08:17:01 11/18/03
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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
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