Optimizing the Implementation of Communication in Synchronous Reactive Models

M. Natale, Guoqiang Wang, A. Sangiovanni-Vincentelli
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引用次数: 5

Abstract

A fundamental asset of a model-based development process is the capability of providing an automatic implementation of the model that preserves its semantics and, at the same time, makes an efficient use of the resources of the execution platform. The implementation of communication between functional blocks in a synchronous reactive model requires buffering schemes and access procedures at the kernel level. Previous research has provided two competing proposals for the sizing of the communication buffer. We demonstrate how it is possible to leverage task timing information to obtain tighter bounds for the case of sporadic tasks or periodic tasks with unknown activation phase, and we propose an approach that applies to a more general model. Furthermore, we provide the description of the data structures and constant-time access procedures for writer and reader tasks, and an implementation compliant with the OSEK OS standard.
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优化同步响应模型中的通信实现
基于模型的开发过程的基本资产是提供模型的自动实现的能力,该实现保留了模型的语义,同时有效地利用了执行平台的资源。在同步响应模型中实现功能块之间的通信需要内核级的缓冲方案和访问过程。先前的研究提供了两种相互竞争的通信缓冲区大小建议。我们演示了如何利用任务计时信息来获得具有未知激活阶段的零星任务或周期性任务的更严格的边界,并且我们提出了一种适用于更一般模型的方法。此外,我们还提供了数据结构的描述和写入器和读取器任务的恒定时间访问过程,以及符合OSEK操作系统标准的实现。
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