[Xen-users] More vcpus than physical cores and hvm

["Alexandre Biancalana" <biancalana@xxxxxxxxx>]

Hi List,

  I have a server with two QuadCore 2.93Ghz processors and 16GB Ram,
running Debian etch and Xen 3.2-1.

  Until yesterday I had in this server 2 hvm virtual machines, running
w2k, 4 vcpus each without any problem, the use of each virtual machine
rarely reach 70%. Today I cloned one of the virtual machines and
started they with 2 vcpus, right after I start this new guest the use
of cpus on the others guest vms showed by task manager climb to 50%
(kernel time)  and If I start another new guest with 2 vcpus, the
first two guests reach close to 100% of cpu use

  Can I have more vcpus than physical cores on Xen ?? There's
something to do with hvm ? Have some configuration (cpu scheduling) to
improve this situation ? Someone have a similar setup ?

 Best Regards,

Alexandre

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