A Period Assignment Method for Fixed Priority Preemptive Real-time Systems

被引:4
|
作者
Liu, Jiankang [1 ]
Fu, Yunzhong [1 ]
Chen, Chuanwei [1 ]
Fu, Hongya [1 ]
机构
[1] Harbin Inst Technol, Sch Mech & Elect Engn, Zhi Zao Lou 415, Harbin, Heilongjiang, Peoples R China
关键词
Real-time System; Period Assignment; Fixed-priority; Response Time; Schedulability; SELECTION;
D O I
10.1145/3012258.3012275
中图分类号
TP3 [计算技术、计算机技术];
学科分类号
0812 ;
摘要
Fixed priority preemptive scheduling policy is widely adopted for periodic task scheduling in embedded real-time operating systems. However, there are few methods or criteria for period assignment of periodic tasks. In this paper, a period assignment method which combines schedulability analysis and quality of service considerations is proposed. Periodic task sets with ranges for the periods of individual tasks are considered. This method is designed to enlarge the tasks' quality of service while maintaining schedulability of the system. High priority tasks are given preference to be assigned with a short period. A case study is presented to show the effectiveness of the proposed period assignment algorithm.
引用
收藏
页码:89 / 92
页数:4
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