摘要
本文介绍了多任务版本的实时系统调度算法。该算法能够满足实时系统中的关键性任务在最坏情况下运行时,仍可满足截止时间的要求。通过为实时系统中的关键性任务设置两个任务版本,即主态和从态版本。主态任务版本具有较好的质量,从态任务版本只提供最基本的功能,运行时间较短。在最坏情况下避免调度主态任务版本,来满足实时调度的实时性要求。
In this paper, we presented Multiple task version scheduling. The scheduling ensures that critical tasks will complete before their deadline even under its worst-case time in real-time system. For each critical task, we have two versions, a primary and an alternative. The primary may be capable of providing better-quality service, while the alternative is a ＂bare-bone＂version that provides service that is just capable. The alternative version has a much smaller worst-case execution time than the primary. So we can avoid having to preallocate the primary for its worst-case time.
出处
《科技广场》
2009年第5期35-36,共2页
Science Mosaic
关键词
实时
多任务版本
主态
从态
Real-time
Multiple Task Version
Primary Version
Alternative Version
