Linux系统中实时仿真程序时间精确性分析  

Time Accuracy Analysis of Real-time Simulation Program in Linux OS

作　　者：姜忠钦[1] 姚新宇[1] 吴重祥[2] 

机构地区：[1]国防科技大学机电工程与自动化学院 [2]92267部队

出　　处：《计算机仿真》2006年第10期76-79,99,共5页Computer Simulation

摘　　要：随着Linux操作系统内核的不断改进和升级,其实时性能逐渐能够满足大部分控制系统的需求;同时Linux操作系统免费开放了其内核源代码,因此可以通过对其内核源代码的分析来更加深入、精确掌握Linux定时测量机制。该文详尽介绍了与Linux定时测量相关的各种内核机制,并以具体的仿真程序为例,针对不同的运行环境(是否有网络数据传输,实时仿真程序设置为定时器方式还是单进程方式),逐步分析Linux系统下实现的实时仿真的方法、Linux内核执行仿真进程的步骤以及定时测量的精确性,为Linux系统平台上的实时仿真应用提供精确的参考指标和最优实现方案。Along with the continual improvement and update of Linux OS Kernel, its real - time capability can meet the requirement of most control systems gradually. And the Linux Kernel Codes are open to everyone, so through studying them we can analyze Linux Timing - measurement accurately. The paper first introduces all kernel subsystems relating to Timing - measurement in detail. Then by designing simulation programs for different running conditions （whether the system having network data transmission, and the real - time simulation program running in Timer mode or Single - process mode） , the article analyses the way to realize real - time simulation, the steps by which Linux Kernel performs the simulation process, and the accuracy of Timing - measurement in Linux OS. The work mentioned above can provide the applications of Real - time Simulation in Linux OS with accurate parameters and the optimal plan.

关 键 词：定时测量 时钟中断 软中断 

分 类 号：TP316.2[自动化与计算机技术—计算机软件与理论]