实时多任务系统优先级分配策略研究

Priorty-based allocation strategy of real-time multitasking system

实时多任务系统能够对外界输入作出预期的反应,取决于两个方面:一是系统计算形成的逻辑结果,二是结果产生的时间,即既要求逻辑结果正确,还要求在限定的时间内输出结果。对于典型的优先级静态分配、基于抢占式调度的实时多任务系统,复杂任务的优先级配置显得尤为重要,该文对此情况进行了分析讨论并提出了5条任务优先级设置原则,在以往的实时系统应用中取得了较好的效果。

Real-time multitasking system can make the expected response to external input,depending on two aspects:one is the logical result of the system calculation,the second is the result of the time,that is,both the logical results are correct,but also within a limited time result.For the typical priority static allocation,based on the priority of the real-time multitasking system,complex tasks’s preemptive scheduling is very important,this article will discussed about it.