Dear Dario,
Now I'm experimenting with RTDS, in particular with "extra time" functionality.
My experimental setup is built on Salvator-X board with H3 SOC (running only big cores cluster, 4xA57).
Domains up and running, and their VCPU are as following:
root@generic-armv8-xt-dom0:/xt/dom.cfg# xl sched-rtds -v all
Cpupool Pool-0: sched=RTDS
NameID VCPU Period Budget Extratime
(XEN) FLASK: Allowing unknown domctl_scheduler_op: 3.
Domain-00 0 10000 1000 yes
Domain-00 1 10000 1000 yes
Domain-00 2 10000 1000 yes
Domain-00 3 10000 1000 yes
(XEN) FLASK: Allowing unknown domctl_scheduler_op: 3.
DomR3 0 10000 5000 no