On 18/01/2011, at 9:25 PM, joe fu wrote: > I'm checked out my /proc/cpuinfo file and I'm finding the following changes. > > Physical ID : 0 > Siblings : 1 > core id :0 > cpu cores :1 > apicid :0 > initial apicid:0 > > This is what I noticed when I edited the vm with this ... > <cpu> > <topology sockets='1' cores='2' threads='4'/> > </cpu> Hi Joe, Looking at the same part of the XML description as you did: http://libvirt.org/formatdomain.html#elementsCPU You're right, in that it shows we have some kind of capacity to process that info. Some questions that might help us find the answer: + What's the virtualisation host you're trying this out on? i.e. KVM/Xen/vSphere/ESX/VirtualBox/etc + Which version of libvirt is it running? + What guest OS's have you tried with? Regards and best wishes, Justin Clift