基于CPN的μC/OS系统实时性能分析  

Research on performance analysis of μC/OS real-time system based on CPN

作　　者：潘勇[1,2] 方俊 彭省临[2] 

机构地区：[1]中南林业科技大学涉外学院,湖南长沙410004 [2]中南大学地学与环境工程学院,湖南长沙410004 [3]长沙民政学院,湖南长沙410004

出　　处：《计算机工程与设计》2009年第8期1994-1997,共4页Computer Engineering and Design

摘　　要：仿真并分析了μC/OS系统固定优先级调度系统,指出当前的静态分析方法无法评估具体实时性能指标的局限性。提出使用CPN(赋时着色Petri网)对μC/OS实时系统中任务调度机制建模,包括系统各子任务之间的依赖关系、各任务的实限要求以及固定优先级调度机制,并通过运行模型来获取系统的具体实时性能指标。实验结果表明,基于动态仿真获取的性能数据,可指导优化系统中各任务的优先级设计,从而提高系统的实时性能。Priority-fixed scheduling system of μC/OS system is simulated and analyzed, and the limitation of the static method used to practical real-time performance analysis is pointed out. To address this problem, modeling technique for the real-time system with priority-fixed scheduling based on timed color Petri net is proposed, which can quickly model real-time tasks creating and scheduling mechanism. The experimental results show that through simulating Petri net model of real-time system, priority design of real-time task set based on system＇s practical real-time performance index is evaluated and optimized.

关 键 词：μC/OS系统 任务优先级 赋时着色PETRI网 性能分析 仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]