基于Linux内核修改的车载监控系统实时性研究  

Real-time Vehicle Monitoring System Based on Linux Kernel Modification

作　　者：梁中华[1] 吴晓云[1] 冯兴乐[1,2] 

机构地区：[1]长安大学信息工程学院,陕西西安710064 [2]西安导航技术研究所,陕西西安710068

出　　处：《现代电子技术》2010年第15期173-176,共4页Modern Electronics Technique

基　　金：中国博士后科学基金资助项目(20080441159);陕西省自然科学基础研究计划资助项目(2007F11);长安大学科技发展基金资助项目(07Z09)

摘　　要：针对以往车载监控系统存在较大延时的缺点,设计一种实时宽带车载监控系统。该系统通过在32位ARM微处理器中选用可抢占内核和O(1)调度器的Linux2.6.13操作系统,以直接修改Linux内核的方式,从线程化中断、自旋锁可抢占两方面提高系统的实时响应性。测试表明,此系统的数据传输实时性和带宽可以满足车载监控的要求。A real-time wide-band vehicle monitoring system was designed in view of the long time delay of former vehicle monitoring system.The Linux2.6.13kernel of O（1）scheduler and preemption in the 32bits ARM microprocessor is selected.In order to improve real-time responsiveness,the kernel is modified directly by means of threaded interrupt and preemptive spin lock.It is demonstrated that the real-time performance and the band width of this system can satisfy the request of vehicle monitoring system.

关 键 词：LINUX ARM微处理器 线程化中断 自旋锁 实时响应性 

分 类 号：TN919[电子电信—通信与信息系统] TP914[电子电信—信息与通信工程]