优化网络物理系统调度程序的预期时间效用

T. Tidwell, R. Glaubius, C. Gill, W. Smart
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引用次数: 12

摘要

经典的调度抽象,如截止日期和优先级,并不容易捕捉到许多实时网络物理系统中发现的复杂的时序语义。时间效用函数提供了必要的更丰富的时间语义描述,但使用它们设计效用感知调度策略是一个开放的研究问题。特别是,实时网络物理领域需要优化预期效用增益的调度设计。在本文中,我们设计了调度策略,以优化具有随机持续时间的周期性、不可抢占任务的网络物理系统的预期效用。这些策略是通过求解调度问题的马尔可夫决策过程公式推导出来的。我们使用这个公式来证明我们的技术改进了现有的启发式效用应计调度策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optimizing Expected Time Utility in Cyber-Physical Systems Schedulers
Classical scheduling abstractions such as deadlines and priorities do not readily capture the complex timing semantics found in many real-time cyber-physical systems. Time utility functions provide a necessarily richer description of timing semantics, but designing utility-aware scheduling policies using them is an open research problem. In particular, scheduling design that optimizes expected utility accrual is needed for real-time cyber-physical domains. In this paper we design scheduling policies that optimize expected utility accrual for cyber-physical systems with periodic, non-preemptable tasks that run with stochastic duration. These policies are derived by solving a Markov Decision Process formulation of the scheduling problem. We use this formulation to demonstrate that our technique improves on existing heuristic utility accrual scheduling policies.
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