嵌入式Linux的实时性能

A Study on the Real Time Performance of Linux

随着 Internet和芯片技术的迅猛发展 ,嵌入式操作系统的研究成为当前热点。通过分析 L inux作为嵌入式操作系统的优点和缺点 ,从进程调度策略和中断管理技术方面详细分析了 L inux操作系统内核实时性能不足的原因 ,最后提出了两种提高 L inux实时性的解决方案 :修正 L inux内核 ,在 L inux内核的限定范围内尽可能扩充实时性 ;在 L inux内核之外 ,另备实时处理模块 。

Along with the rapid progress of the Internet and the chip technology, the embedded operating system is becoming the current hot spot of research.This paper,in the first place, analyzes the merits and shortcomings of Linux-an embedded operating system.Then the paper anatomizes the reasons for the deficiency of performance of Linux in the aspects of processing scheduling strategies and interrupting handling techniques. To promote the real time performance of Linux, two methods are put forward at the end of the paper.These methods are 1) modifying the kernel of Linux to enlarge the real time performance within the scope allowed by the Linux kernel, and 2) proving another real time processing module outside the Linux kernel to assure the trait of high performance of response.