libvirt users - Feb 2017 - How to achieve higher priority of a process in a lxc on CentOS machine

Dear all,

I use libvirt lxc to host a real-time application with priority of -50. The
native OS is fedora21 and lxc is also fedora21. Everything works fine. Linux
"top" command shows the priority is -50).

Then I use Openstack to manage lxc. The native compute node OS is CentOS7.2. and
the lxc is fedora. After the real-time application is started in the lxc. top
command on the native machine sees the real-time application with priority of
20, which is not what I expect. If lxc is Ubuntu, the priority of real-time
application is also 20.

Can anybody help me on this?

Cheng Wang