[libvirt-users] Libvirt heavy CPU usage

[Samuel Hassine]

Hi there,

We are currently using OpenStack with the libvirt driver (libvirt 
version: 0.9.11.3) and LXC containers.  We are observing a really bad 
CPU usage of libvirt_lxc processes:

   PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND
28828 root      20   0 40852 1376  832 R 104.4  0.0 516:44.27 libvirt_lxc
20560 root      20   0 40852 1372  832 R  98.6  0.0 454:42.48 libvirt_lxc
22419 root      20   0 40852 1376  832 R  98.6  0.0 499:16.98 libvirt_lxc
26238 root      20   0 40852 1376  832 R  98.6  0.0 500:42.94 libvirt_lxc
28307 root      20   0 40852 1376  832 R  92.8  0.0 594:16.96 libvirt_lxc
20408 root      20   0 40852 1376  832 R  69.6  0.0 364:21.02 libvirt_lxc
17495 root      20   0 40852 1372  832 R  63.8  0.0 421:40.78 libvirt_lxc
23725 root      20   0 40852 1376  832 R  46.4  0.0 459:03.75 libvirt_lxc
24710 root      20   0 40852 1368  832 R  40.6  0.0 494:30.45 libvirt_lxc
  1350 root      20   0 40852 1372  828 R  34.8  0.0 358:49.72 libvirt_lxc

But theses domains are not really active, they are just "minimal" 
virtual engines without any trafic or load.

Is it a "normal" way or there is something wrong?

Thanks for your answer.

Best regards.
Sam