Implementation and analysis of realtime communica

Authors: João Rodrigues João Ventura A M de Campos Luís Rodrigues

Publish Date: 2007/07/17

Volume: 37, Issue: 1, Pages: 45-76

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Abstract

A flexible way of building modular communication stacks relies on the use of protocol composition This paper describes a protocol composition framework that simplifies the task of deriving the worstcase response time of a protocol composition from the protocol implementation In order to derive the worstcase response time of a protocol composition one needs to capture its eventgraph the eventgraph consists of the set of all events processed by each component and the relation between those events The framework called RTAppia takes a pragmatic approach instead of requiring the use of domain specific code analysis tools or dedicated compilers it simply requires protocol programmers to make explicit which events are processed and produced by each layer and how these events are related An interesting aspect of the approach is that the same data structures that are used to simplify the task of computing the worstcase response time of the protocol composition are also used to optimize the performance and to debug the resulting implementation

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