避免优先级反转的基本程序结构

Kwang-rok Kim
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引用次数: 16

摘要

以固定优先级进程组的形式构建实时并发程序是一门古老的艺术,它只适用于一小部分现代实时分布式计算应用系统。然而,它仍然是在技术基础不足的基础上进行实践的。使用固定优先级流程结构方法的一个基本问题是避免优先级反转现象。有人认为,优先级反转本质上是由于不适当的方法用于构建程序,包括分配资源的策略规范。提出了避免优先级反转的几种基本程序结构技术。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Basic program structures for avoiding priority inversions
Structuring real-time concurrent programs in the form of groups of fixed-priority processes is an old art which is appropriate for only a small fraction of modem real-time distributed computing application systems. However, it is still practiced on the basis of an insufficient technical foundation. One of the basic issues in using the fixed-priority process structuring approach is to avoid the priority inversion phenomenon. It is argued that priority inversions are essentially due to the inappropriate approach used for structuring programs including the specification of the policy for allocating resources. Several basic program structuring techniques which are effective means of avoiding priority inversions are presented.
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