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Real-Time Embedded Systems by Gabriele Manduchi, Ivan Cibrario Bertolotti

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14

 

 

Schedulability Analysis Based on Response Time Analysis

 

CONTENTS

14.1 Response Time Analysis

14.2 Computing the Worst-Case Execution Time

14.3 Aperiodic and Sporadic Tasks

14.4 Summary

The previous chapter introduced an approach to schedulability analysis based on a single quantity, the utilization factor U, which is very easy to compute even for large task sets. The drawback of this simple approach is a limit in the accuracy of the analysis, which provides only necessary or sufficient conditions for fixed-priority schedulability. Moreover, utilization-based analysis cannot be extended to more general process models, for example, when the relative deadline Di of task τi is lower than its period Ti. In this chapter, a more sophisticated ...

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