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[Xen-users] SMP and CPU hyperthreading

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: "Lars E. D. Jensen | DCmedia" <ledj@xxxxxxxxxxx>
  • Date: Tue, 19 Apr 2005 18:01:59 +0200
  • Delivery-date: Tue, 19 Apr 2005 15:55:07 +0000
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

Hi list

I have a server with SMP and the CPUs support HyperThreading. I can start domU 
on cpu = 0, cpu = 1, cpu = 2 and cpu =3.

I read that there's basic support for HyperThreading, what does this mean?

And how is performance on 0,1,2 and 3 with HyperThreading compared to 
non-HyperThreading CPUs 0 and 1? Is 2 weaker than a non-HyperThreading 0?

Would it better to disable HyperThreading with noht as boot option?

Med venlig hilsen / Best regards
Lars E. D. Jensen
ledj@xxxxxxxxxxx - http://dcmedia.biz

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