From high-level modelling of time in MARTE to real-time scheduling analysis.

International audienceAn important challenge in the domain of automotive control design is to provide a seamless flow for modelling conjointly with the behaviour, the temporal characteristics and the timing constraints of a system at different abstraction levels. In addition, this flow should provide analysis phases for validating the real-time behaviour of the functional models in regard to these constraints and a specific execution platform, To achieve this goal, we adopt a model-based approach, based on the UML MARTE profile [1], that allows the modelling of a system, with a separation of concerns between the software (functional model) and the execution platform resources (non-functional model) as well as the timing constraints (non-functional model). The temporal characteristics (offset, period) and timing constraints (deadline) are modelled with a high level notion of time called the logical time at the functional level down to the physical time called the chronometric time at the implementation level. From these high-level models we extract the temporal characteristics and the timing constraints of the application relatively to the execution platform, and we apply scheduling analysis techniques in order to provide an implementation which satisfies the timing constraints