Re: [libvirt-users] CPU Resource Reservation using KVM

On 4/13/2015 1:18 PM, Kashyap Chamarthy wrote: >On Mon, Apr 13, 2015 at 12:14:12PM +0530, Jatin Davey wrote: >>Hi All >> >>I am new to KVM world. I have been using VMware for about a year. >> >>In VMware world we can reserve cpu resources for a VM. Say for instance if >>we need 4 vCPUs with a total of 8000 GHz then we can mention this >>configuration in vCenter while creating a VM. This guarantees 8000 GHz of >>cpu resources for the deployed VM. >> >>How can i achieve the same thing using KVM ? >If you are comfortable with command line, you can look at `virsh` manual >page for > > setvcpus - change number of virtual CPUs > >to control how many vCPUs you can allocate. > >If you're using `virt-manager`, you should be able to control it via UI >for a guest under its "Show virtual hardware details" and look for >"Processor". > > I have looked at virsh and more specifically "setvcpus".

We can assign virtual CPUs using it but my question is different. I am looking at reserving cpu speed to the virtual cpu's. I know we can allocate and modify the amount vcpu's using setvcpus command but how can i ask kvm to reserve a particular amount of cpu speed of the host core's to the virtual cpus.