I need a container that supports real time threads. According to the documentation, I can do something like this: <domain type='lxc'> <name>test1</name> <uuid>e7446f55-3d59-4af0-90b2-d1498ac4370d</uuid> ... <vcpu placement='auto'>2</vcpu> <cputune> <vcpusched vcpus='0-1' scheduler='fifo' priority='1'/> </cputune> ... </domain> The document describes the vcpusched element as follows: The optional |vcpusched| elements specifies the scheduler type (values |batch|, |idle|, |fifo|, |rr|) for particular vCPU/IOThread threads (based on |vcpus| and |iothreads|, leaving out |vcpus|/|iothreads| sets the default). Valid |vcpus| values start at 0 through one less than the number of vCPU's defined for the domain. Valid |iothreads| values are described in the |iothreadids| |description| <https://libvirt.org/formatdomain.html#elementsIOThreadsAllocation>;. If no |iothreadids| are defined, then libvirt numbers IOThreads from 1 to the number of |iothreads| available for the domain. For real-time schedulers (|fifo|, |rr|), priority must be specified as well (and is ignored for non-real-time ones). The value range for the priority depends on the host kernel (usually 1-99). So I *think* my xml is correct for this, but it doesn't seem to work--I still can't create real time threads in my container. Am I missing another configuration step somewhere? Peter