Several pinwheel schedulers have been reported previously for scheduling real-time systems in which the temporal distances between consecutive executions of tasks must be less than their respective distance constraints. The scheduler Sr has been used for task sets with real number distance constraints and execution times. Sr transforms the distance constraints in a system into harmonic values with a base of 2. The authors present a pinwheel scheduler Sr/sup b/ which is derived from Sr using any base greater than or equal to d. The schedulability condition of Sr/sup b/ is presented and its optimality is proved. They also study the performance of Sr/sup b/ by simulation and compare it with a near-optimal heuristic algorithm HSr.
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机译:先前已经报道了几种风车调度器,用于调度实时系统,在该实时系统中,任务的连续执行之间的时间距离必须小于其各自的距离约束。调度程序Sr已用于具有实数距离约束和执行时间的任务集。 Sr将系统中的距离约束转换为基数为2的谐波值。作者介绍了风车调度程序Sr / sup b /,它使用大于或等于d的任何基数从Sr派生。提出了Sr / sup b /的可调度性条件,并证明了其最优性。他们还通过仿真研究了Sr / sup b /的性能,并将其与接近最优的启发式算法HSr进行了比较。
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