分布式实时嵌入式中间件的调度体系

The Scheduling System In Distributed Realtime Embedded Middleware

在实时CORBA1.2的基础上扩展了一种分布式调度体系,这种调度体系可以获取全局信息,从而本地调度器可以获得更加准确的调度信息。这里只讨论本地调度器使用截止期调度策略的情况,因此这种调度器可以使得分布式任务在截止期之前完成的可能性增大。如果本地调度器使用其他的调度算法,可以在这种体系中给出相应的机制来提供更准确的调度信息。文中主要描述了这种调度体系的设计与实现。

The distributed scheduling system designed in this paper extends that of the Real- Time CORBA 1.2. It＇s able to get global information, so the local schedulers can get more accurate scheduling information. The local schedulers are assumed to use deadline algorithm, so the scheduling system make it harder for distributed task to lose deadline. If local schedulers use other algorithms, the scheduling system is able to give appropriate mechanisms. This paper aims to describe design and implementation of the scheduling system.