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Re: [Xen-users] how many VCPUs per physical CPU?
| To: | Siddharth Wagh <siddharth.wagh@xxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-users] how many VCPUs per physical CPU? |
| From: | Peter Peltonen <peter.peltonen@xxxxxxxxx> |
| Date: | Mon, 6 Jul 2009 17:22:18 +0300 |
| Cc: | xen-users <xen-users@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Mon, 06 Jul 2009 07:22:59 -0700 |
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| Sender: | xen-users-bounces@xxxxxxxxxxxxxxxxxxx |
Hi and thanks for your reply, On Mon, Jul 6, 2009 at 4:47 PM, Siddharth Wagh<siddharth.wagh@xxxxxxxxx> wrote: > The Xen document specifies that upto 32 VCPUs may be allocated to a single > domU. But it is recommended that one allocates the same number of VCPUs or > less than the number of logical CPUs on your machine, for optimum > performance. Since, you have a quad-core processor, the maximum number of > VCPUs you could allot to each domU w/o compromising on performance is 4. But what is the benefit of having more VCPUs in a logical CPU? In what kind of cirumstances does a domU perform better with a 4 VCPUs than with 1 VCPU? I don't undrestand the difference, as in the end there is just one logical CPU doing all the work. Regards, Peter _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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