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Optimizing the Implementation of Communication in Synchronous Reactive Models

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3 Author(s)
Di Natale, M. ; Scuola Superiore S. Anna, Pisa ; Guoqiang Wang ; Vincentelli, A.S.

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.

Published in:

Real-Time and Embedded Technology and Applications Symposium, 2008. RTAS '08. IEEE

Date of Conference:

22-24 April 2008

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