2015
Autores
Martínez, Ricardo Garibay; Nelissen, Geoffrey; Ferreira, Luís Lino; Pinho, Luís Miguel;
Publicação
Abstract
Distributed real-time systems such as automotive applications are becoming larger and more complex, thus,
requiring the use of more powerful hardware and software architectures. Furthermore, those distributed
applications commonly have stringent real-time constraints. This implies that such applications would gain in
flexibility if they were parallelized and distributed over the system. In this paper, we consider the problem of
allocating fixed-priority fork-join Parallel/Distributed real-time tasks onto distributed multi-core nodes connected
through a Flexible Time Triggered Switched Ethernet network. We analyze the system requirements and present a
set of formulations based on a constraint programming approach. Constraint programming allows us to express
the relations between variables in the form of constraints. Our approach is guaranteed to find a feasible solution,
if one exists, in contrast to other approaches based on heuristics. Furthermore, approaches based on constraint
programming have shown to obtain solutions for these type of formulations in reasonable time.
2015
Autores
Albano, Michele; Garibay-Martínez, Ricardo; Lino Ferreira, Luis;
Publicação
INForum - Simpósio de Informática (INFORUM 2015).
Abstract
The Arrowhead project [1] considers to normalize all interactions involving embedded
systems by mediating them through services. The Service Oriented Architecture (SOA)
paradigm is applied to both the interactions that provide the service requested by the
user, and other support actions such as the authentication and registration of the devices,
and the services they provide, the look-up of devices and service provided, and orchestration
of services for creation of more complex services. To this purpose, services are
divided into Core Services, which are present in every environment supporting Arrowhead
applications, and user services that implement the applications. The Core Services
set comprises, at least, Authentication Service, Registration Service and Orchestration
Service.
2015
Autores
Martínez, Ricardo Garibay; Nelissen, Geoffrey; Ferreira, Luís Lino; Pedreiras, Paulo; Pinho, Luís Miguel;
Publicação
Abstract
This paper presents a holistic timing analysis for
fixed-priority fork-join Parallel/Distributed tasks (P/D tasks) over
a Flexible Time Triggered - Switched Ethernet (FTT-SE) network.
The holistic approach considers both time-triggered and eventtriggered
tasks/messages.
2015
Autores
Ferreira, LL; Pinho, LM; Albano, M; Teixeira, C;
Publicação
ACM SIGBED Review
Abstract
2015
Autores
Pedro, AD; Pereira, D; Pinho, LM; Pinto, JS;
Publicação
RUNTIME VERIFICATION, RV 2015
Abstract
Temporal logics targeting real-time systems are traditionally undecidable. Based on a restricted fragment of MTL-integral, we propose a new approach for the runtime verification of hard real-time systems. The novelty of our technique is that it is based on incremental evaluation, allowing us to effectively treat duration properties (which play a crucial role in real-time systems). We describe the two levels of operation of our approach: offline simplification by quantifier removal techniques; and online evaluation of a three-valued interpretation for formulas of our fragment. Our experiments show the applicability of this mechanism as well as the validity of the provided complexity results.
2015
Autores
Pedro, AdM; Pereira, D; Pinho, LM; Pinto, JS;
Publicação
SIGBED Review
Abstract
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