I want to implement a new CPU QoS but i don't know what data needs in "Limit: field.

I saw this page, http://www.ovirt.org/Features/CPU_SLA but as i can see it only reference to http://libvirt.org/formatdomain.html#elementsCPUTuning

Does Limit field need to be filled with some options from <cputune>?

Is there some related information?

Ovirt: 3.5.1
Centos: 6.6

Regards,