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RE: [Xen-users] Re: Can we know how many physical cores or ht cores runon the guestos


  • To: "lei yang" <yanglei.fage@xxxxxxxxx>, Pasi Kärkkäinen <pasik@xxxxxx>
  • From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
  • Date: Fri, 28 May 2010 17:20:16 +1000
  • Cc: Xen Mailing List <xen-users@xxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Fri, 28 May 2010 00:23:47 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • Thread-index: Acr+NaVkTedwJQoVQCiSzPBkUERMgwAAFQ+A
  • Thread-topic: [Xen-users] Re: Can we know how many physical cores or ht cores runon the guestos

> 
> I have 8 physical cores.
> 
> 
> host                   : localhost
> release                : 2.6.33.3
> version                : #4 SMP PREEMPT Thu May 27 15:14:45 CST 2010
> machine                : i686
> nr_cpus                : 16
> nr_nodes               : 1
> cores_per_socket       : 4
> threads_per_core       : 2

Would a 'threads_per_core' of 2 mean that you have hyperthreading enabled? 
Admittedly I was probably using Xen 2 at the time but I found that 
hyperthreading was horrible for virtualisation. Someone must have some more 
current testing results for hyperthreading though.

James

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