A formal model of the Ada Ravenscar tasking profile; delay until

Authors:
Kristina Lundqvist;Lars Asplund
Affiliations:
Uppsala University, Information Technology, Dept. of Computer Systems, P.O. Box 325, S-751 05 Uppsala, Sweden;Uppsala University, Information Technology, Dept. of Computer Systems, P.O. Box 325, S-751 05 Uppsala, Sweden
Venue:
Proceedings of the 1999 annual ACM SIGAda international conference on Ada
Year:
1999

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Abstract

The definition of the Ravenscar Tasking Profile for Ada 95 provides a definition of a tasking runtime system with deterministic behaviour and low enough complexity to permit a formal description and verification of the model. A complete run-time system is being modeled using the real-time model checker UPPAAL, and this work describes the handling of delay until. Since scheduling is not yet modelled a simple non-preemptive scheduler has been used when verifying the delay queue.