Monotonicity and run-time scheduling
EMSOFT '09 Proceedings of the seventh ACM international conference on Embedded software
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A distributed real-time control system is modeled by au- tomatically generating a virtual execution platform and in- tegrating it with an abstract run-time model. This allows us to capture the dynamic effects of non-deterministic behavior of the underlying hardware and real-time operating system (RTOS), which cannot be accurately evaluated by existing static approaches. Our framework has been implemented and integrated with the existing AIRES toolkit. The con- struction of a virtual execution platform for a control appli- cation is observed to take 422ms. The integrated platform and control application consists of 56 software components connected by 1280 links for data exchanges and precedence relations, and the constructed platform executes the appli- cation at a normalized speed--defined as the ratio of simu- lation time to real time -- 10.6. Our preliminary evaluation has demonstrated the virtual execution platform's capabil- ity of providing accurate run-time information at a reason- able time-cost.