摘要： Linux是一种通用操作系统，但不适合实时应用。针对上述问题，通过对Linux时钟系统管理方面的研究，提出一种针对时钟的改进策略，以此为基础，根据实时应用的特点设计高精度定时器。实验证明，改进方案能有效提高Linux的时钟精度，满足实时方面的 需求。

关键词: 实时操作系统, 时钟源, 时钟事件设备

Abstract: Linux is designed to be a general-purpose operating system, it is not suitable for real-time applications, but because of its open source, many solutions have been put forward to enhance its real-time ability. Inspired mostly by Gettimeofday(GTOD), the paper gives a method based on timer management improvement for high resolution timers. Experiments on the modified OS show that the improvement gives a better result for applications with real time constraints than original Linux kernel.

Key words: real-time OS, clock source, clock event device

中图分类号: 

• TP316.81