Abstract: According to the demand of the validity period of data in application system, this paper proposes a real-time schedule model based on producer-consumer model by using model-based software design method. The model relaxes the deadline restriction for the task period in Earliest Deadline First(EDF) algorithm to resolve the problem of precedence constrain in the model. Real-time schedule simulation program designed can truly reflect the schedule situation of the tasks.

Key words: real-time schedule, odel-based design, precedence constrain, simulation program

摘要： 针对应用系统的数据有效期需求，利用基于模型的软件设计方法，提出一种基于生产者-消费者模型的实时调度模型，该模型放宽了最早截止期优先调度算法中周期对截止期的限制，解决了模型中的优先约束问题。设计的实时调度仿真程序可以真实地反映系统对任务的实际调度情况。

关键词: 实时调度, 于模型的设计, 约束, 真程序

CLC Number: 

• TP391.9