RE: [Xen-users] vcpus questions!

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Rodrigo Lord
> Sent: 13 April 2007 13:27
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] vcpus questions!
> 
> Hi!
> 
> I`m testing xen...
> 
> and I tried to load 20 vcpus! but just 8 vcpus works!
> 
> Is there a maximum number of vcpus that I can load?
> How porcentage each vcpus get of the physical CPU ? And how 
> can I configure it?

You should be able to use more than 8 VCPU's in one guest - however, you
can't use more VCPU's at any given time than the number of physical
cores in the machine, so to run more than 8 VCPU's at once, you need
something like a 
4-socket machine with quad-core processors or 8-socket machine with dual
core processors (or 16 socket machine with single core processors)
[assuming we take the standard 2^n processor configurations - of course
there are several permutations of odd-number sockets that would also
allow more than 8 VCPU's]. 

Note that also some OS's have limits of how many CPU's they allow in any
particular distribution/configuration, so this may also limit the number
of CPU's actively working. 

--
Mats
> 
> 
> Thanks!
> 
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