ETAPS 2019
Sat 6 - Thu 11 April 2019 Prague, Czech Republic

Data flow formalisms are commonly used to model systems in order to solve problems of buffer sizing and task scheduling. A prerequisite for static analysis of a modeled system is the existence of a periodic schedule in which the sizes of communication channels can be bounded for an unbounded execution (consistency), and that communication dependencies do not introduce a deadlock in such an execution (liveness). In the context of Cyber-Physical Systems, components are often interfaced with the physical world and have frequency constraints. The existing data flow formalisms lack expressiveness to fully cover the expected behavior of these components. We propose an extension to Synchronous Data Flow (SDF) formalism, called Polygraph, that includes frequency constraints and adjustable communication rates. We show that with these extensions, the conditions for a model to be consistent and live are no longer sufficient, and we extend the corresponding theorems with necessary and sufficient conditions to preserve these properties. We also introduce a framework to check the liveness of a Polygraph model, implemented in the tool DIVERSITY, along with preliminary experiments to validate this approach.

Thu 11 Apr
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fase-2019-papers
14:00 - 16:00: FASE 2019 - Specification, Design, and Implementation of Particular Classes of Systems at JUPITER
Chair(s): Reiner HähnleTechnical University of Darmstadt
fase-2019-papers14:00 - 14:30
Talk
Chao PengUniversity of Edinburgh, UK, Ajitha RajanUniversity of Edinburgh
Link to publication
fase-2019-papers14:30 - 15:00
Talk
Nikolaos Bezirgiannis, Frank S. de BoerCentrum Wiskunde & Informatica, Leiden University, Einar Broch JohnsenUniversity of Oslo, Violet Ka I Pun, Silvia Lizeth Tapia TarifaUniversity of Oslo
Link to publication
fase-2019-papers15:00 - 15:30
Talk
Mario BravettiUniversità di Bologna, Saverio GiallorenzoUniversity of Southern Denmark, Jacopo MauroUniversity of Southern Denmark, Iacopo Talevi, Gianluigi Zavattaro
Link to publication
fase-2019-papers15:30 - 16:00
Talk
Link to publication