Predicting Real-Time Properties of Component Assemblies: a Scenario-Simulation Approach

Abstract

This paper addresses the problem of predicting timing properties of multi-tasking component assemblies during the design phase. For real-time applications, it is of vital importance to guarantee that the timing requirements of an assembly will be met. We propose a simulation-based approach for predicting the real-time behaviour of an assembly based on models of its constituent components. Our approach extends the scenario-based method in [2] by offering a system model that is tailored to the domain of real-time applications. Contributions of this paper include the possibility to handle the following features: mutual exclusion, combinations of aperiodic and periodic tasks and synchronization constraints. The analytical approach we used in previous work cannot handle these features. Therefore, we introduce the simulation-based approach. Our simulator provides data about dynamic resource consumption and real-time properties like response time, blocking time and number of missed deadlines per task. We have validated our approach using a video-decoder application.

Authors

Egor I. Bondarev, Johan Muskens, Peter de With, Michel Chaudron, Johan Lukkien

Published in

30th Euromicro Conference; Component-based Software Engineering Track; August 31, 2004

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