Author: Robert Hyatt
Date: 08:23:53 11/22/04
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On November 22, 2004 at 10:48:02, Steve Maughan wrote: >I have a relatively new machine that has a P4 with Hyperthreading. I've >recently installed Shredder 8 and Gandalf 6. When playing a match I switched to >the Task Manager to look at the memory usage and noticed that when Gandalf was >thinking, according to the TM, it was only using 50% of the CPU while Shredder 8 >was using 100% (both had Ponder = off). On further investigation Shredder was >using 2 threads in the engine. Looking at the speed, both were getting >approximately the same nps which is inline with other machines I have tested >them on. > >So the question is - does the Task Manager report the CPU resource usage >incorrectly in this situation i.e. 50% = 100% usage of 1 processor? I'm >reasonably sure that this is the case but wanted to check. > >Thanks, > >Steve Maughan It is difficult for _any_ program to figure out what is going on, since hyper-threading makes the O/S think there are two equal CPUs, when there really is not... for engine vs engine you should turn it off in the BIOS...
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