Linux内核中一种高精度定时器的设计与实现-《计算机技术与发展》

文章信息/Info

Title:: Design and Implementation of a High- Resolution Timer in Linux Kernel

Author(s):: ZHOU Peng; ZHOU Ming-tian; Computer Sci. and Techn. Coil. ,Univ. of Electronic Sci. and Techn

摘要:: CGL（Carrier Grade Linux）是由开源组织（OSDL，Open Source Development Lab）发起的、专门针对电信级服务的Linux。CGL在标准Linux的基础上，增加了一组为适应电信运营环境而设计的特性。某些电信应用对实时性有较高要求，普通Linux在实时性方面和电信平台的要求之间还存在一定的差距。为增强系统的软实时能力，CGL要求提供一种精度在0．1毫秒以上高精度定时器（high-resolution timer）。首先介绍Linux内核2．6．x中时钟与定时器的情况，然后详细阐述这种符合POSIX1003．1b API标准的高精度定时器的设计与实现，最后总结该定时器的性能并得出结论

Abstract:: CGL（Carrier Grade Linux）, which focuses on telecom service, is initialized by open source organization （OSDL,Open Source Development Lab）. Based on generic release of Linux, CGL adds a series of features to meet the telecom grade needs. High - resolution timer is an enhancemcnt for generic Linux soft real - time performance whose interfaces conform to the POSIX1003. 1b API. This paper firstly introduces the clock and timer in standard kernel 2.6. x. Secondly describes design and implementation of high - resolution timer. At last summarizes the performance of high - resolution timer and draws a conclusion