Abstract
In this chapter we present some basic issues that should be considered during the design and the development of a hard real-time kernel for critical control applications. For didactical purposes, we illustrate the structure and the main components of a small real-time kernel, called DICK (DIdactic C Kernel), mostly written in C language, which is able to handle periodic and aperiodic tasks with explicit time constraints. The problem of time predictable intertask communication is also discussed, and a particular communication mechanism for exchanging state messages among periodic tasks is illustrated. Finally, we show how the runtime overhead of the kernel can be evaluated and taken into account in the schedulability analysis.
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© 1997 Kluwer Academic Publishers
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(1997). Kernel design issues. In: Hard real-time computing systems. The Springer International Series in Engineering and Computer Science, vol 416. Springer, Boston, MA. https://doi.org/10.1007/978-0-585-28005-9_9
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DOI: https://doi.org/10.1007/978-0-585-28005-9_9
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-7923-9994-0
Online ISBN: 978-0-585-28005-9
eBook Packages: Springer Book Archive