On Sat, Mar 15, 2014 at 11:37:22PM +0100, Pasquale Dir wrote: > I am a student and I am using python libvirt api, like the ones which were > used in order to build virt-manager. > > I am wondering how to obtain the %cpu usage and I thought asking to you, as > you did it for your program which is written in python. > > getCpuStats() function on a domain object gives me > cpu_time,user_time,system_time...I don't know how to combine them in order > to obtain the % usage. > > For the guest system I take the delta between two successive measurations > and make a division, putting idle time just on the denominator...but here? > Maybe the cpu_time is actually an idle time for the guest? IIRC it's nanoseconds used by the vCPU (and note there may be multiple vCPUs per guest). In any case, have a look at the source for virt-top. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v _______________________________________________ virt-tools-list mailing list virt-tools-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/virt-tools-list
