Semi-partitioned Cyclic Executives for Mixed Criticality Systems

In a cyclic executive, a series of frames are executed in sequence; once the series is complete the sequence is repeated. Within each frame, units of computation are executed, again in sequence. In implementing cyclic executives upon multi-core platforms, there is advantage in coordinating the execution of the cores so that frames are released at the same time across all cores. For mixed criticality systems, the requirement for separation would additionally require that, at any time, code of the same criticality should be executing on all cores. In this talk we derive algorithms for constructing such multiprocessor cyclic executives for mixed-criticality collections of independent jobs.