Abstract

A real-time job scheduling system receives jobs from the environment, which must be queued and scheduled such that job deadlines and priorities are satisfied and processor usage is optimized. In order to compare different scheduling algorithms, formal methods that help to model the system are highly useful. In a previous paper, we developed a statecharts-based specification of real-time job scheduling systems. This paper uses a recent version of timed statecharts for the same problem and compares them to the earlier approach. Some surprising conclusions are reached.

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