Dumitru Potop-Butucaru

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In this paper we introduce the notion of weak endochrony, which extends to a synchronous setting the classical theory of Mazurkiewicz traces. The notion is useful in the synthesis of correct-by-construction communication protocols for globally asynchronous, locally synchronous (GALS) systems. The independence between various computations can be exploited(More)
Several efficient compilation techniques have been recentlyproposed for the generation of sequential (C) codefrom Esterel programs. Consisting essentially in direct simulationof the reactive features of the language, these techniquesneed now to be accommodated with traditional issuesof Esterel - the definition of formal semantics, the constructivecausality,(More)
We introduce a model for the representation of asynchronous implementations of synchronous specifications. The model covers classical implementations, where a notion of global synchronization is preserved by means of signaling, and globally asynchronous, locally synchronous (GALS) implementations where the global clock is removed. Our model offers a unified(More)
The design of electronic Embedded Systems relies on a number of different engineering disciplines. As the domain becomes ever more important, both in theoretical challenges and in industrial relevance, it has drawn a considerable attention in recent years, with a number of proposals for formalisms, languages and models to help support the design flow. In(More)
We consider the problem of synthesizing the asynchronous wrappers and glue logic needed for the correct GALS implementation of a modular synchronous system. Our approach is based on the weakly endochronous synchronous model, which defines high-level, implementation-independent conditions guaranteeing correct desynchronization at the level of the abstract(More)
An important step in model-based embedded system design consists in mapping functional specifications and their tasks/operations onto execution architectures and their resources. This mapping comprises both temporal scheduling and spatial allocation aspects. Therefore, we promote an approach which starts from loosely-timed/asynchronous models and proceeds(More)
Synchronous reactive formalisms associate concurrent behaviors to precise schedules on global clock(s). This allows a non-ambiguous notion of "absent" signal, which can be reacted upon. But in desynchronized (possibly distributed) implementations, absent values must be explicitely exchanged, unless behaviors were already provably independent and(More)
Worst-case execution time (WCET) analysis has reached a high level of precision in the analysis of sequential programs executing on single-cores. In this paper we extend a state-of-the-art WCET analysis technique to compute tight WCETs estimates of parallel applications running on multi-cores. The proposed technique is termed integrated because it considers(More)
We propose a technique to automatically synthesize programs and schedules for hard real-time distributed (embedded) systems from synchronous data-flow models. Our technique connects the SynDEx scheduling tool and the Network Code toolchain in a seamless flow of automatic model transformations that go all the way from specification to implementation. Our(More)