Realizing Compositional Scheduling through Virtualization
The authors present a co-designed scheduling framework and platform architecture that together support compositional scheduling of real-time systems. The architecture is built on the Xen virtualization platform, and relies on compositional scheduling theory that uses periodic resource models as component interfaces. They implement resource models as periodic servers and consider enhancements to periodic server design that significantly improve response times of tasks and resource utilization in the system while preserving theoretical schedulability results. They present an extensive evaluation of their implementation using workloads from an avionics case study as well as synthetic ones.