Analysis of Linux Real-time Mechanism

随着Linux操作系统在嵌入式实时系统中的广泛应用,有效地提高Linux有限的实时性能是一个重要问题,而Linux内核可抢占调度是实时性能的改进的关键。对Linux内核调度器的工作原理进行了深入分析,并阐述了调度延迟是其实时性不强的原因,然后介绍通过可抢占机制对Linux内核进行改造,测试了改进后的内核的实时性。With the wide application of Linux operation system in embedded real-time system fields,the enhancement of Linux real-time performance becomes more and more important.Preemptive kernel is a decisive condition of a system's realtime performance.This paper analyzes of Linux scheduler and presents that the scheduler latency is the major cause of Linux OS'non-real-time.Then present a solution to enhance the real-time performance of Linux.In the end,the simulation results are represented