RT-Xen: Towards Real-time Hypervisor Scheduling in Xen
https://personal.utdallas.edu/~cxl137330/courses/fall14/RTS/papers/8a.pdf
Real-Time Scheduling for Xen-ARM Virtual Machines
https://ieeexplore.ieee.org/abstract/document/6583914
Small scheduling tick size is harmful because frequent tick interferes with CPUs power saving mode, and it incurs considerable TLB, cache flush overheads. On the other hand, large scheduling tick size is bad for responsiveness because the large scheduling tick size implies the longer scheduling latency.