基于Xenomai的实时Linux系统的研究  

Research on Real-time Linux System Based on Xenomai

作　　者：苏宇[1,2,3] 张涛[2] 孙黎[1,2,3] 

机构地区：[1]中国科学院光电研究院,北京100094 [2]中国科学院空间应用工程与技术中心,北京100094 [3]中国科学院大学,北京100190

出　　处：《计算机技术与发展》2013年第10期1-5,共5页Computer Technology and Development

基　　金：国家重大专项:载人航天应用系统总体设计(Y2140102RN)

摘　　要：针对标准Linux操作系统实时性不好的问题,提出一种更加注重用户态的实时性且兼容多种流行实时操作系统的实时化方案,即利用Xenomai实时补丁改造标准Linux内核的实时化方案,并基于工控PC机,搭建了基于Xenomai实时补丁的实时Linux系统,并对其实时性进行了测试。测试结果表明,实时化后的操作系统具有良好的用户态、内核态以及定时器中断响应下的实时性,中断处理的最大延迟时间减小到令人满意的几十微秒级数量级,可以用于对实时性要求较高的强实时应用领域。Owing to the lack of real-time in the standard Linux system,a real-time method based on Xenomai that emphasizes on user-mode real-time and can be compatible with a variety of popular real-time operating system was proposed. Build the real-time Linux sys-tem by using the Xenomai real-time patch on industrial PC and do some real-time testing. The result shows that the real-time Linux sys-tem based on Xenomai has a good user-mode real-time,excellent kernel-mode real-time and response of timer interruption,the worst time of interruption processing delays reduces to a satisfactory magnitude-tens of microseconds,and can be used for high real-time appli-cations.

关 键 词：实时 LINUX 中断延迟 XENOMAI 

分 类 号：TP316.2[自动化与计算机技术—计算机软件与理论]