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Subject: Re: Dual Xeon 2.8 GHz, Crafty 19.09 bench, cann't understand it (part 1) ...

Author: Gian-Carlo Pascutto

Date: 14:00:51 01/14/04

Go up one level in this thread

The problem you are seeing is because any Windows versions prior to
Windows 2003 Server do not understand hyperthreading correctly (even the
claimed 'hyperthreading aware' Windows XP!).

As a result, when you set MT=2, the two processes get randomly
scheduled between the 4 processors, including the case where
both processes are running on the same physical CPU.

Use MT=4 or disable Hyperthreading, or upgrade OS.

--
GCP

• Re: Dual Xeon 2.8 GHz, Crafty 19.09 bench, cann't understand it (part 1) ... Frank Quisinsky 14:13:04 01/14/04
  • Re: Dual Xeon 2.8 GHz, Crafty 19.09 bench, cann't understand it (part 1) ... Gian-Carlo Pascutto 14:28:24 01/14/04
    • Re: Dual Xeon 2.8 GHz, Crafty 19.09 bench, cann't understand it (part 1) Robert Hyatt 20:28:21 01/14/04
    • Re: Dual Xeon 2.8 GHz, Crafty 19.09 bench, cann't understand it (part 1) ... Frank Quisinsky 14:42:34 01/14/04
      • Re: Dual Xeon 2.8 GHz, Crafty 19.09 bench, cann't understand it (part 1) ... Gian-Carlo Pascutto 15:01:30 01/14/04
        • Re: THANKS ... Frank Quisinsky 15:05:09 01/14/04
  • Re: Dual Xeon 2.8 GHz, Crafty 19.09 bench, cann't understand it (part 1) ... Thomas Mayer 14:19:08 01/14/04
    • Re: Dual Xeon 2.8 GHz, Crafty 19.09 bench, cann't understand it (part 1) ... Gian-Carlo Pascutto 14:31:47 01/14/04

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