引入虚拟特征参数的混合实时任务调度及应用  

Hybrid real-time tasks' scheduling with virtual characteristic parameters and its application

作　　者：胡艳雄[1] 赵维娜[1] 周平方[1] 段登平[1] 

机构地区：[1]上海交通大学航空航天学院,上海200240

出　　处：《计算机应用研究》2013年第4期1004-1006,1020,共4页Application Research of Computers

基　　金：国家高技术发展计划资助项目(2011AA7052011)

摘　　要：提出了在实时环境下周期任务与非周期任务混合调度的一种新方法。引入非周期实时任务虚拟截止期、虚拟周期的特征参数,综合考虑各实时任务的多特征参数进行优先级设计,克服了单独考虑任务的个别参数以及忽略非周期任务自身特征的调度策略的局限性及调度风险,且能够尽可能地加快非周期任务的响应速度,提高系统整体的调度性能。将该方法在RT-Linux实时环境中实现,并针对无人飞艇的自动驾驶仪进行了任务实例的可调度性测试,证明了该调度策略的可行性。This paper proposed a new method for scheduling periodic and aperiodic tasks in the hard real-time environment.The method advanced virtual deadline and virtual period for aperiodic tasks,then implemented the designment of task priority based on multi-feature parameters.This overcomed the insufficient of scheduling methods that considered single-feature parameter or ignored aperiodic task＇s own parameters,also enhanced the aperiodic tasks＇ response speed and the scheduling performance.The result of experiment based on RT-Linux environment of unmanned airship＇s autopilot shows that the new method is schedulable.

关 键 词：无人飞艇 自动驾驶仪 非周期任务 实时调度 虚拟特征参数 

分 类 号：TP316.2[自动化与计算机技术—计算机软件与理论]