Abstract: This paper presents the study of the latency behavior of the Linux OS. The authors identify that the scheduler latency is the major cause of Linux OS’ non-real-time. This paper first analyzes the mechanism of Linux scheduler, and then describes the specific design and implementation of its improvement. Finally, the simulation results and the estimation are represented.

摘要： Linux操作系统在嵌入式实时系统中得到了广泛的应用,有效地提高Linux有限的实时性能是一个重要问题,Linux内核调度器实时性能的改进又是其中的关键。该文分析了Linux操作系统调度器的工作机理,指出了影响其实时性能的原因,详细地描述了实时性改进的方案和实现,并给出了改进后的测量结果及评价。

关键词: 实时系统, Linux, 调度器, 调度延迟, 可抢断内核

CLC Number: 

• TP316