一种Linux实时化技术的研究  

Research of a Real-Time Technology with Linux

作　　者：田振[1] 蒋新华[1] 陈兴武[1,2] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083 [2]福建工程学院,福建福州350014

出　　处：《计算机技术与发展》2009年第4期28-30,34,共4页Computer Technology and Development

基　　金：福建省自然科学基金(JA04257);福建省经贸委消化吸收再创新资助项目(闽经贸计财[2006]804号)

摘　　要：Linux是作为一个分时操作系统而开发的,其实时性能并不出色,但可以对Linux进行实时性改造,以满足不同的实时需求。由于它具有源代码开放的特点。将其改造为一个实时的操作系统,已成为目前嵌入式系统应用领域的研究热点。文中分析了Linux作为实时操作系统的不足,剖析了一种增强Linux实时性的技术——RTAI的基本思想,研究了基于ADEOS的RTAI内核的实现机制,对linux-2.6.19内核进行了实时性改造,并对改造后的RTAI-Linux的实时性进行了测试,结果表明RTAI-Linux的实时性能够满足硬实时系统的要求。The Linux kernel uses a fair- share scheduling algorithm designed for time sharing. For the real - time requirement, it makes sense to modify the Linux. Its source code is open, so it has been the research focuses in the field of the embedded system application that rebuilding Linux into a real - time operation system. In this paper, the deficiency of standard Linux as real - time operating system was analyzed. Then the major idea of RTAI enhancing Linux kernel＇s real time capability was analyzed in detail, and the realization mechanism of RTAI based on ADEOS was researched. At last the real - time ability of Linux - 2.6.19 was improved, and the real - time performance of RTAI - Linux was tested, The results showed that the RTAI - Linux can meet the requirements of hard real - time system.

关 键 词：实时操作系统 LINUX RTAI ADEOS 内核 

分 类 号：TP316[自动化与计算机技术—计算机软件与理论]