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Schedulability and Compatibility of Real Time Asynchronous Objects

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4 Author(s)

We apply automata theory to specifying behavioralinterfaces of objects and show how to check schedulabilityand compatibility of real time asynchronous objects.The behavioral interfaces of real time objects specify(the order and timings of) the messages an object maysend and receive. Each object is checked against itsbehavioral interface; first, to guarantee its correct outputbehavior, and second to make sure that every messageit may receive is processed within the designateddeadline (schedulability analysis). Next, we propose anew technique for testing whether every object is usedas expected (i.e., according to its behavioral interface)when combined with other objects (compatibility check).Compatibility additionally implies schedulability in thecontext of the actual system. The analyses are automatedusing the Uppaal model checker.

Published in:

Real-Time Systems Symposium, 2008

Date of Conference:

Nov. 30 2008-Dec. 3 2008