Méthodologie basée sur des membranes pour la gestion de la reconfiguration dynamique dans les systèmes embarqués parallèles

National audienceLa reconfiguration partielle et dynamique donne une nouvelle dimension pertinente et efficace à la conception des systèmes embarqués parallèles. Toutefois, en raison de la complexité de ces systèmes, assurer la cohérence et la gestion du parallélisme lors de l'exécution reste un défi majeur. Ainsi, des modèles d'architectures et des méthodologies de conception assistée sont nécessaires pour permettre la gestion efficace de la reconfiguration matérielle. Notre approche est inspirée des modèles, à base de composants, bien connus dans le monde du logiciel. Le modèle que l'on propose est basé sur des membranes enveloppant les composants du système. L'objectif est d'améliorer la productivité de conception et d'assurer la cohérence de la gestion des changements de composants virtuels réutilisables (IPs) ainsi que le changement de contexte. Ces membranes sont distribuées et optimisées dans le but de concevoir des systèmes autoadaptatifs

Membrane-based design and management methodology for parallel dynamically reconfigurable embedded systems

International audiencePartial and dynamic reconfiguration provides a relevant new dimension to design efficient parallel embedded systems. However, due to the encasing complexity of such systems, ensuring the consistency and parallelism management at runtime is still a key challenge. So architecture models and design methodology are required to allow for efficient component reuse and hardware reconfiguration management.This paper presents a distributed persistence management model and its implementation for reconfigurable multiprocessor systems on dynamically reconfigurable circuits. The proposed approach is inspired from the well-known component based models used in software applications development. Our model is based on membranes wrapping the systems components. The objective is to improve design productivity and ensure consistency by managing context switching and storage using modular distributed hardware controllers. These membranes are distributed and optimized with the aim to design self-adaptive systems by allowing dynamic changes in parallelism degree and contexts migration. Simulation and synthesis results are given to show performances and effectiveness of our methodology

A Multi-Objective Evolutionary Approach to Professional Course Timetabling: A Real-World Case Study

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Optimisation Multi-Objectif pour la Recommandation : application à une MOOC d'entreprise

International audienceOptimisation Multi-Objectif pour la Recommandation : application à une MOOC d'entrepris

Une approche évolutionnaire multiobjectif pour la planification des cours professionnels

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Dynamic and Load Balanced Video Surveillance System based on a FoG/ Cloud Architecture

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Dynamic and Load Balanced Video Surveillance System based on a FoG/ Cloud Architecture

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A modeling front-end for seamless design and generation of context-aware Dynamically Reconfigurable Systems-on-Chip

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A modeling front-end for seamless design and generation of context-aware Dynamically Reconfigurable Systems-on-Chip

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A modeling front-end for seamless design and generation of context-aware Dynamically Reconfigurable Systems-on-Chip

International audienceIn this paper, we present a Model Driven Engineering (MDE) methodology for facilitating the modeling of the partial reconfiguration process, and for implementing Dynamic Reconfigurable System-on-Chip (DRSoC). The rationale for this approach is to provide a modeling front-end that enables to visually compose a hardware platform, containing heterogeneous components, using both static and context-management hardware wrappers. A model transformations engine (MTE) processes the high-level models to obtain the inputs for the Xilinx dynamic partial reconfiguration (DPR) design flow, with the benefit of better exploiting and reusing the designer intentions regarding the allocation of tasks into reconfigurable areas. Furthermore, the automatic synthesis of a reconfiguration controller (RecOS) with context-management and task relocation capabilities is supported in this version of our tool. The latter feature is possible due to the integration of relocation tool OORBIT into the design chain, but we point out at other avenues of research. We present a case study in which we assess the benefits of the methodology and present a thorough analysis of the reconfiguration costs associated with the context and relocation management, showing speedups of 1.5x over other solutions