Novel Control Method for Preventing Missed Deadlines in Periodic Scheduling

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Processing that is executed periodically must be completed before the next release time. If such processing is not completed before the next release time, the processing that had been scheduled is not executed. This is complicated by the fact that the execution time from release to the end of periodically executed processing is not constant, due to changing I/O processing time and the influence of timer interrupts. To solve this, we propose a system that records the execution time of the processing, judges whether the processing will be finished before the specified deadline, and can execute appropriate processing that can be completed within the remaining time. In this paper, we describe the design and evaluation of our system.

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