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Preemption delay analysis for floating non-preemptive region scheduling
Marinho, José; Nélis, Vincent; Petters, Stefan M.; Puaut, IsabelleIn real-time systems, there are two distinct trends for scheduling task sets on unicore systems: non-preemptive and preemptive scheduling. Non-preemptive scheduling is obviously not subject to any preemption delay but its schedulability may be quite poor, whereas fully preemptive scheduling is subject to preemption delay, but benefits from a higher flexibility in the scheduling decisions. The time-delay involve...
An improved preemption delay upper bound for floating non-preemptive region
Marinho, José; Nélis, Vincent; Petters, Stefan M.; Puaut, IsabelleIn embedded systems, the timing behaviour of the control mechanisms are sometimes of critical importance for the operational safety. These high criticality systems require strict compliance with the offline predicted task execution time. The execution of a task when subject to preemption may vary significantly in comparison to its non-preemptive execution. Hence, when preemptive scheduling is required to operat...
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