Author: Gian-Carlo Pascutto
Date: 02:58:14 11/01/05
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On November 01, 2005 at 05:44:34, Gabor Szots wrote: >I just got a new machine with P4 3GHz CPU. Analyzing positons with chess >programs I looked at task manager and was surprised by seeing that only 50% CPU >was assigned to the chess program thread while the other 50% was idle. >I tried the same with Deep Sjeng with 2 processor setting and I saw 2 50% CPU >threads while the system was idle 0%. Ok, however the Nps was the same as with >only 1 processor, and test solution times were also the same. >This all was under WinXP SP2. > >How can I exploit full CPU power? Any explanation would be welcome. A system with hyperthreading really only has a single processor, it just pretends there are two. At best you will get a few percent speedup. A real dual core processor will give >70-80% speedup. -- GCP
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