基于Linux的仪器操作系统研究与实现  

Analysis and design of the instrument OS based on Linux

作　　者：何福贵[1] 王家礼[1] 

机构地区：[1]西安电子科技大学机电工程学院

出　　处：《西安电子科技大学学报》2006年第1期129-132,共4页Journal of Xidian University

基　　金：电子测试技术重点实验室基金资助项目(51487010503DZ104)

摘　　要：分析了L inux的特点和作为仪器操作系统的不足.为了设计能够满足仪器要求的操作系统,在时钟粒度、内核可剥夺性和优先级反转等方面,对L inux的内核进行了改造.通过分析CPU的时钟结构,实现了时钟粒度的细化,通过双内核在原内核中增加抢占点相结合,实现了具有可剥夺性的新内核,通过优先级继承协议的实现,避免了优先级翻转.最后进行了实验测试.实验结果表明,该结构增强了实时性,拓宽了内核的适用范围,可满足仪器的需要.The demand for the instrumental OS is becoming more and more urgent because of instrumental development. The paper analyzes Linux＇s characteristics and shortages if it acts as an instrumental OS. In order to design this kind of OS that satisfies instrumental requirement, Linux＇s kernel is modified in timer resolution, kernel preemption and priority reversion and so on. Improving the timer is realized by the analysis of the CPU structure ; and a new preemptive kernel is realized by the integration of the dual-kernel with inserting preemptive points, and priority reversion is avoided by the realization of PIP. Finally, the test is done. The result shows that real-time performance is efficiently improved and the scope of use is extended, and thus it is effective for instrumental requirement.

关 键 词：仪器操作系统 调度延迟 时钟粒度 优先级反转 

分 类 号：TP316[自动化与计算机技术—计算机软件与理论]