基于模糊最早价值时间优先的动态调度算法
Journal Title: Science Paper Online - Year 2008, Vol 3, Issue 1
Abstract
实时控制系统调度中，最早截止时间优先(EDF)算法在超载时会造成系统控制性能急剧下降且严重影响了系统的稳定性，限制了其应用。为此，本文提出了模糊最早价值时间优先(FEVF)的调度方法。该算法基于模糊思想，构造了任务截止期的模糊隶属度函数，并根据任务的在线执行情况对任务进行价值度评价，从而动态地获得任务的价值时间，价值时间越早，任务的优先级越高。仿真结果表明，FEVF算法调度下系统的稳定性能在一定重载下保持较好的状态，可实现大范围负载内的优雅降级，使系统不致突然出现失效或崩溃。
Authors and Affiliations
XIONG Ying SHEN Qing
Keywords
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