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Subject: Re: Odd hyperthreading behavior

Author: Gian-Carlo Pascutto

Date: 18:09:05 10/04/03

On October 04, 2003 at 21:00:34, Tom Kerrigan wrote:

>The odd part is that hyperthreading DOES slow down my program when running 2
>threads.

This is caused by the schedulers not knowing the difference between the
real and virtual cpus. You're only running on 1 cpu instead of 2 about
1/3 of the time.

Win2k3 is the only OS that has this reportedly solved.

--
GCP

Re: Odd hyperthreading behavior Robert Hyatt 20:45:28 10/04/03
Re: Odd hyperthreading behavior Tom Kerrigan 18:40:59 10/04/03
- Re: Odd hyperthreading behavior Gian-Carlo Pascutto 18:49:48 10/04/03
  - Re: Odd hyperthreading behavior Robert Hyatt 20:49:01 10/04/03
  - Re: Odd hyperthreading behavior Tom Kerrigan 18:53:17 10/04/03
    - Re: Odd hyperthreading behavior Dave Gomboc 22:52:41 10/04/03
      - Re: Odd hyperthreading behavior Tom Kerrigan 03:09:33 10/06/03
    - Re: Odd hyperthreading behavior Gian-Carlo Pascutto 18:59:43 10/04/03
      - Re: Odd hyperthreading behavior Tom Kerrigan 19:27:45 10/04/03
        
        Re: Odd hyperthreading behavior Jeremiah Penery 20:54:43 10/04/03
        
        Re: Odd hyperthreading behavior Tom Kerrigan 03:15:58 10/06/03
        
        Re: Odd hyperthreading behavior Robert Hyatt 06:56:59 10/06/03
        
        Re: Odd hyperthreading behavior Tom Kerrigan 11:14:51 10/07/03
        
        Re: Odd hyperthreading behavior Robert Hyatt 13:28:45 10/07/03
        
        Re: Odd hyperthreading behavior Vincent Diepeveen 10:46:51 10/05/03
        
        Re: Odd hyperthreading behavior Jeremiah Penery 12:41:33 10/05/03
        
        Re: Odd hyperthreading behavior Eugene Nalimov 13:43:21 10/05/03
        
        Re: Odd hyperthreading behavior Jeremiah Penery 18:57:51 10/05/03
        
        Re: Odd hyperthreading behavior Robert Hyatt 19:53:29 10/05/03
Re: Odd hyperthreading behavior Anthony Cozzie 18:11:17 10/04/03

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