I would like to know how much memory and cpu virtual machine are using so yes guest's perspective. I'm building a web app that has to alert the user when the vm is going to be stressed and I would like to do this in terms of mem and cpu usage.

Thanks in advance for your support,

Enrico De Maio

On Mon, Mar 10, 2014 at 7:16 PM, Eric Blake <eblake@redhat.com> wrote:

On 03/10/2014 04:54 AM, Enrico De Maio wrote:
> Hi everybody,
>
> I'm using libvirt java api bindings for my thesis. I would like to know if
> there is a way to obtain live information about cpu and mem usage of a
> domain.

Are you asking the question from the host's perspective (how much
resources has the host given to the guest) or from the guest's
perspective (how much is the guest actively using, even if the host has
given it more)? Libvirt already provides several API calls. such as the
ones used by 'virsh cpu-stats' and 'virsh dommemstat'; you may have to
do some code reading to figure out what C calls the virsh code made in
order to find the same API under the Java bindings.

--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org