Abstract:
Preemptive scheduling of periodically arriving tasks on a multiprocessor is considered. We show that many common multiprocessor real-time scheduling algorithms suffer from scheduling anomalies, that is, deadlines are originally met, but a decrease in execution times or an increase in periods of tasks can cause deadlines to be missed. We propose a partitioned multiprocessor fixed-priority scheduling algorithm with the prominent features that (i) it does not suffer from such scheduling anomalies and (ii) if less than 41 % of the capacity is used then deadlines are met. 1
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