嵌入式软件仿真测试环境实时任务调度的研究

摘要

Vxworks is a Real-time operating system providing the real-time and multitasking environment. After analysising the func-tions of Embedded Software Simulation Test Environment (ESSTE) which needs to improve the Real -Time and task scheduler, the paper makes use of the priority-based Preemptive Scheduling and function instancy梑ased scheduling algorithm which is a classic schedule algorithm for crucial tasks to develop the scheduling of ESSTE tasks and the specific functions of ESSTE Priority task is confirmed. Then the paper shows the relation figure of the tasks of ESSTE and analysises the realization method of the tasks in detail. Finally the Real-time and scheduling algorithm is validated through the Windview tool provided by tornado 2. 2.%Vxworks操作系统是一个功能强大、而且独立于处理器的实时操作系统,它具有多任务处理能力和保证软件实时性的各种通信机制；在分析嵌入式软件仿真测试环境的多任务性和实时性需求的基础上,基于任务权重优先调度算法和系统的功能模块的紧急度调度算法,对系统的各个模块进行了合理的任务划分,并提出了单处理器下的基于信号量通信的静态权重优先级抢占的任务调度算法；确定了需要调度的任务集合,并给出了测试环境任务总体关联图及具体实现方法,通过Windview工具对任务调度和实时性进行了验证.