[libvirt-users] How can openstack retrieve the CPU usage of a lxc via libvirt?

Dear all, I want to have a view of lxc CPU usage in openstack Dashboard. According the Openstack official site , Openstack Ceilometer can poll libvirt daemon to obtain CPU usage of a virtual machine. I tried the command locally on the libvirtd host "virsh -c lxc:/// domjobinfo", I got an error "error: this function is not supported by the connection driver: virDomainGetJobInfo" I am not sure if Openstack Ceilometer can retrieve the CPU usage of a linux container, if it can, which virsh command or API should be used to this? Thank you for your response in advance. Cheng