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This thesis "Processing statistics generator IxChariot network traffic in an environmentsimulator OPNET Modeler" is focused on collaboration solution simulation tool OPNET Modeler with IxChariot traffic generator and the principle of their connection. The goal is to display the statistics generated in IxChariot software by OPNET Modeler. In this thesis is described procedure of settings inside simulation environment OPNET modeler which are necessary for correct functionality of simulation.

Microarchitectural simulation is needed to help explore the large design space of new computer systems. These simulations are taking increasingly longer amounts of time to run due to the increasing complexity of modern processors. Co-simulation and high level synthesis are promising fields to improve the overall time required for microarchitectural simulators, and can contribute to low design times and fast simulation speeds permitting a larger range of design space exploration. While promising, co-simulation techniques must find effective ways to map the host memory address space to the FPGA memory address space to be able to correctly transfer simulation data between the host and FPGA. Load relations mapping is a new technique that builds upon existing techniques to provide support for the discovery and translation of runtime memory addresses to their equivalent FPGA memory addresses. This is accomplished by storing object reachability information discovered during a memory profiling run and later using it to recreate an object reachability mapping at runtime. This mapping can be traversed to discover needed memory addresses. We demonstrate how this technique can be used by incorporating it into the FAMEbuilder tool flow. Results show that simulation speed is not reduced and that only a small overhead is required to perform the additional memory initialization at the start of simulation. Area increases are also shown and are limited to near 10\% increase on small single core models.

Le principal défi auquel sont confrontés aujourd'hui les équipementiers aéronautiques est d'augmenter l'utilisation des systèmes électriques à bord de l'avion. De nos jours, le remplacement des systèmes hydrauliques par des actionneurs électriques conduit à placer les systèmes électriques dans un environnement hostile, par exemple dans la nacelle du moteur. L'équipement est soumis à des contraintes sévères telles que des températures élevées et basses, un cycle thermique étendu, une humidité élevée et une basse pression. En conséquence, des efforts doivent être faits pour réduire le poids et le volume du convertisseur de puissance sans perdre ses performances. Pour atteindre cet objectif, la conception de modules de puissance doit permettre un haut niveau d'intégration, d'efficacité et de fiabilité. On s’intéresse en particulier aux dommages causés par la fatigue qui ont une influence significative sur les performances électriques de ces modules. Les tests de performance liés à la fatigue restent des efforts coûteux pour l'équipement aéronautique. Un nombre fini de tests destructifs, par vieillissement accéléré, peut être effectué pour un nombre assez faible de configurations. Le but de ces tests est d'étudier les modes de défaillance apparaissant lors du vieillissement accéléré. Par conséquent, des simulations numériques ont été envisagées, facilement évolutives et utilisables pour un grand nombre de configurations, mais nécessitant des données d'essais expérimentaux. Dans ce manuscrit, quelques modes de défaillances sont étudiés. On propose une méthode numérique intégrant les contraintes principales dans les équipements, à savoir la simulation électrique, thermique et mécanique. Ces trois problèmes physiques ont des temps caractéristiques différents et sont fortement couplés avec un comportement non trivial. Pour optimiser l'utilisation des ressources et avoir une représentation pertinente du problème, un procédé couplé électrique 1D / thermique 3D / mécanique 3D a été implémenté sur un bus de cosimulation. Différents pas de temps, différents niveaux d'abstraction et différentes compétences sont utilisés pour fournir un modèle multiphysique de modules de puissance. / Today’s main challenge for aeronautical equipment manufacturers is to respond to the more electrical aircraft regulations. Moreover, there are many applications in aircraft area where high temperature technologies are needed. Nowadays, the replacement of hydraulic systems for electric ones leads to place the power inverters in a harsh environment, for example in the engine nacelle. The equipment is under high constraints such as high and low temperatures, wide temperature cycling, high humidity and low pressure. Combined to these environmental constraints, the new aircraft system is submitted to weight and operating cost reduction. As a consequence, efforts shall be done to reduce weight and volume of the power converter without losing its performance. To reach such a goal, the design of the converter must enable a high level of integration, efficiency and reliability. In particular, fatigue damage has a significant influence on such modules electrical power performance. And fatigue-related performance testing remains a costly endeavor for aeronautical equipment. A finite number of destructive tests can be carried out in specific facilities for a fairly low number of configurations. The purpose of these destructive tests is to investigate the failure modes appearing regarding this accelerated ageing. Therefore numerical simulations have been envisaged since non-destructive, easily evolving and usable for a high number of configurations, though needing data from experimental assays. In this study, we propose a method dealing with the main constraints for such equipment, i.e. electrical, thermal and mechanical simulation. Those three physical problems have different characteristic time and are strongly coupled with a non-trivial behavior. To optimize the resources usage and have a relevant representation of the problem, a 1D electrical / 3D thermal / 3D mechanical coupled method has been implemented over a co-simulation bus. Different time steps, different abstraction levels and different skills are used to provide predictions of the multiphysical fatigue behavior of power modules.

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.

Le sujet de cette thèse est le développement d'une nouvelle méthodologie de synthèse basée sur une approche interactive et<br />flexible conçue pour l'exploration de l'espace des solutions. C'est le concepteur qui est au centre du processus de création, il a la<br />possibilité d'adapter les techniques et les méthodes de conception à l'application et il est guidé par des estimations de haute fidélité pour prendre des décisions pendant la phase de synthèse. La flexibilité concerne l'architecture cible et le flot de conception. Une nouvelle méthodologie pour l'évaluation de performance à partir d'une description de niveau système est aussi<br />présentée. Cette méthodologie est basée sur un modèle de performance exécutable décrit dans un langage de spécification au niveau système.

With complexities of Systems-on-Chip rising almost daily, the system designers have been searching for new methodology that can handle given complexities with increased productivity and decreased times-to-market. The obvious solution that comes to mind is increasing the level of abstraction. However, the most important things that system designers care about are system architectures (components topology), HW/SW performance, and the communication protocols. System designer has to make decisions on these factors in a very short time. Furthermore, the transaction level model (TLM) can satisfy the requests on simulation speed and the information that system designer need. We implement a TLM virtual prototype platform with SystemC composing with the variable wrappers. The basic modules: ISS interface, user-define modules and a flexible bus. Based on the infrastructures, a much faster modeling process of the system can be achieved in this thesis. Finally, the platform will run the whole-system-simulation to verify the functional model and collect the dynamic information on the buses and IPs to diagnose the bottle-neck of the system.

The doctoral thesis is focused on a research in the area of the quality-of-service support technologies in data networks. The current modern communication networks cannot operate correctly without an effective tool allowing differentiated treatment for various network traffic classes. Looking at the current trends in this area it turns out that the technology of Differentiated services is currently the most widely used mechanism for QoS assurance in data networks. The major part of this doctoral thesis concerns the design of a novel QoS system which offers a solution for one of the main problems of DiffServ technology. This disadvantage lies in the missing cooperation between the end station and edge node of the DiffServ domain. To overcome this limitation the system proposed introduces an improvement which enables the user application to actively participate in the resource reservation process by direct configuration of the DSCP value in the IP header of its own packets. This functionality is based on the identification of DiffServ configuration parameters available in the edge router. To retrieve the information required from network component the well-known SNMP protocol has been chosen, which has direct access to the components’s configuration stored in the MIB database. On the basis of this theoretical proposal several simulation scenarios have been created and analysed. The results show that the system designed presents an efficient solution for the mentioned problem of DiffServ. They also give good assumptions for the successful implementation of this system into a real environment.

No description available.

Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.