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An improved real-time task preemptive scheduling in cyber-physical systems

机译：网络物理系统中改进的实时任务抢占式调度

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To improve the performance of real-time task scheduling and the utilization of the system resources in Cyber-Physical System, at the same time, to reduce the number of task switching, this paper improved traditional preemptive task scheduling, introduced the concept of buffer time and the guard time, made judgments when the task may need to switch to, according to the situation to retain the task which had lower priority but should not be suspended, and let the higher priority task wait for a while. Finally, our research verifies the performance of the algorithm by examples and simulation experiments, demonstrates that the algorithm can optimize the performance of CPS, avoids the jitter caused by frequent task switching and its adverse effects on system performance, reduces the number of task switching, and improves the utilization of resources within the system to some extent.
机译：为了提高实时任务调度的性能和网络物理系统中系统资源的利用率，同时减少任务切换的次数，本文改进了传统的抢占式任务调度，引入了缓冲时间的概念以及保护时间，根据情况保留可能优先级较低但不应该暂停的任务，并根据情况判断，让优先级较高的任务等待一会儿。最后，我们的研究通过实例和仿真实验验证了该算法的性能，证明了该算法可以优化CPS的性能，避免了频繁任务切换引起的抖动及其对系统性能的不利影响，减少了任务切换次数，并在一定程度上提高了系统内资源的利用率。

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