基于VxWorks的多任务实时性分析  

Analysis of Multi-task Real-time Characteristics Based on VxWorks

作　　者：张宇[1] 王省书[1] 胡春生[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《微处理机》2013年第1期53-57,共5页Microprocessors

基　　金：高等学校博士学科点专项基金(20104307110021)

摘　　要：为了分析VxWorks操作系统在多任务环境下任务切换的实时性,运用时间戳方法对任务抢占切换时间进行了测量,并通过数据定量分析了任务数量对任务切换时间的影响。同时为了加强任务控制,使用信号量通信机制,设计任务间通信控制程序,并对信号量的实时性影响进行了测量与分析。结果表明任务数量和信号量机制对切换时间有一定影响,但增加的延迟时间非常小。In order to analyze the real - time characteristics of multi - task of the system based on VxWorks, a method is designed to measure the task switching time. By measurement date, the task switching time influenced on multi - task is analyzed. As well as, taking advantage of semaphores task communication mechanism, program is given to aim at controlling multi - task. Then the real - time characteristics of semaphores is measured and analyzed. The result indicates that the quantity of tasks and semaphores mechanism have a certain influence on the task switching time, but the added delay time is very short.

关 键 词：VXWORKS系统 实时操作系统 任务调度机制 任务通信 

分 类 号：TP316.2[自动化与计算机技术—计算机软件与理论]