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Historically safety-critical real-time systems have been implemented using a cyclic executive (CE). Here a series of frames (minor cycles) are executed in sequence. Once the series is complete the sequence is repeated. The duration of the full sequence is often known as the major cycle. Within each frame, units of computation (jobs) are executed, again in sequence. Although there are a number of drawbacks...
Real-time systems are increasingly running a mix of tasks with different criticality levels: for instance, unmanned aerial vehicle has multiple software functions with different safety criticality levels, but runs them on a single, shared computational platform. In addition, these systems are increasingly deployed on multiprocessor platforms because this can help to reduce their cost, space, weight,...
When multiple computational resource elements collaborate to handle events in a cyber-physical system, scheduling algorithms on these resource elements and the communication delay between them contribute to the overall system utilization and schedulability. Employing earliest deadline first (EDF) scheduling in real-time cyber-physical systems has many challenges. First, the network layer of a resource...
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