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Subject: Re: SURPRISING RESULTS P4 Xeon dual 2.8Ghz

Author: Frank E. Oldham

Date: 01:20:42 12/18/02

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On December 17, 2002 at 16:50:05, Robert Hyatt wrote:

>On December 17, 2002 at 16:39:14, Frank E. Oldham wrote:
>
>>http://www.kernel.org/pub/linux/kernel/people/rusty/Hyperthread_Scheduler_Modifications.html
>>
>>discusses scheduler improvements needed to avoid the problem Vincent encountered
>>with 2 processes plus HT-enabled -- and other issues
>>
>>AFAIK there are already test patches for some of these changes available
>
>
>This has been a known issue.  I raised it about 6 weeks ago with Alan (Cox) on
>the linux
>kernel-SMP mailing list.  The locks were fixed early as he reported.  The
>scheduler changes
>were not done at the point I asked...
>
>I don't follow the normal kernel mailing list as it is too busy.  Glad to see
>that something is
>"in the works."
>
>I might try the latest development kernel to see what happens...

Check out http://kerneltrap.org/node.php?id=391
for details on HT-aware scheduler patch to 2.5.31

Some benchmarks at http://kerneltrap.org/node.php?id=406




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