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Busy period analysis is often used as a basis for worst-case response time analysis of priority based systems. However, when shaping strategies are used to prevent starvation of lower priorities, it becomes difficult to achieve tightness results using this method. The reason for this is that a busy period is defined as the longest interval in which there exists pending load. It is exclusively based...
Fixed-priority scheduling with deferred preemption(FPDS) and fixed-priority scheduling with preemption thresholds(FPTS) have been proposed in the literature as viable alternatives to fixed-priority preemptive scheduling (FPPS), that reduce memory requirements, reduce the cost of arbitrary preemptions, and may improve the feasibility of a task set even when preemption overheads are neglected. This...
Hierarchical scheduling frameworks (HSFs) provide means for composing complex real-time systems from well-defined independently developed and analyzed subsystems. To support shared logical resources requiring mutual exclusive access in two-level HSFs, overrun without payback has been proposed as a mechanism to prevent budget depletion during resource access arbitrated by the stack resource policy...
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