On 4/13/2015 2:19 PM, Kashyap Chamarthy wrote:
On Mon, Apr 13, 2015 at 01:41:59PM +0530, Jatin Davey wrote:
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".
You mention that info only now.
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.
Okay. I don't notice an option to regulate CPU freq. But the closest I
see is the 'quota' XML attribute (as part of 'cputune' element) that
will "ensure that all vcpus run at the same speed."
https://libvirt.org/formatdomain.html#elementsCPUTuning
Yes , The information provided in this link is what precisely i wanted
to know. Thanks for pointing to it.
Thanks
Jatin
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