基于有限优先级的动态调度算法

实时任务调度是实时系统中的关键问题,实时动态调度是实时调度的主要方面。当实时调度应用于实际的任务系统时,仅能使用有限的优先级数量。实时调度在理论分析时,都假设系统能够识别任意多的优先级。该文提出了在优先级数量有限的条件下的动态调度算法,给出了一个任务系统动态调度所需的最小优先级的数量的算法,并对算法的复杂性进行了分析。

Dynamic Scheduling Algorithm Based on Limited Number of Priority

Real-time tasks scheduling is key problem in real-time system, real-time dynamic scheduling is main aspect of real-time scheduling. When real-time scheduling is used in practical system it may just use limited number of priority level. When real-time scheduling theory carry out theoretic analysis, all of them assume that there are unlimited number of priority level. The paper present the algorithm of dynamic real-time scheduling in the condition of limited priority level, and presents the minimum number of priority level that the tasks system schedules dynamically. Finally, the algorithm complexity is analyzed.