Runtime dynamic reconfiguration of field-programmable gate arrays (FPGAs) and devices incorporating microprocessors and FPGA has been successfully utilized to increase performance and reduce power consumption. While previous methods have been successful, they typically do not consider the runtime behavior of the application that can be significantly affected by variations in data inputs, user interactions, and environmental conditions. In this dissertation, we present a dynamically reconfigurable system and design methodology that optimizes performance and power consumption by determining which coprocessors to implement with an FPGA based upon the current application behavior.For dynamically reconfigurable systems, in which the selection of hardware coprocessors to implement within the FPGA is determined at runtime, online estimation methods are essential to evaluate the performance and power consumption impact of the hardware coprocessor selection. We present a base profile assisted online system-level performance and power estimation framework for estimating the speedup and power consumption of dynamically reconfigurable embedded systems.Importantly though, complex interactions between multiple application tasks, non-deterministic execution behavior, and effects of operating system scheduling introduce significant challenges. To address these, we further present an adaptive online performance and power estimation framework suing kernel speedup coefficient adaptation that monitors and adapts the changing application and system behavior for multitasked applications. By exhaustively examining predefined voltage and frequency settings for the microprocessor and hardware kernels, the potential speedup and power reduction can be effectively estimated for each configuration and voltage/frequency settings. These estimates can be utilized to determine the optimal system configuration. At the same time, the kernel speedup coefficients for each kernel can be dynamically updated to account for the difference between the estimated and actual performance measured at runtime.Finally, in order to quickly determine kernel selection and voltage and frequency settlings, we present an efficient, online heuristic performance and power estimation framework that significantly decreases execution time at the cost of a small increase in power consumption. This online heuristic estimation framework achieves significant power reduction compared to software only implementation without performance degradation.

The increasing use of model-driven software development has renewed emphasis on using domain-specific models during application development. More specifically, there has been emphasis on using domain-specific modeling languages (DSMLs) to capture user-specified requirements when creating applications. The current approach to realizing these applications is to translate DSML models into source code using several model-to-model and model-to-code transformations. This approach is still dependent on the underlying source code representation and only raises the level of abstraction during development. Experience has shown that developers will many times be required to manually modify the generated source code, which can be error-prone and time consuming. An alternative to the aforementioned approach involves using an interpreted domain-specific modeling language (i-DSML) whose models can be directly executed using a Domain Specific Virtual Machine (DSVM). Direct execution of i-DSML models require a semantically rich platform that reduces the gap between the application models and the underlying services required to realize the application. One layer in this platform is the domain-specific middleware that is responsible for the management and delivery of services in the specific domain. In this dissertation, we investigated the problem of designing the domain-specific middleware of the DSVM to facilitate the bifurcation of the semantics of the domain and the model of execution (MoE) while supporting runtime adaptation and validation. We approached our investigation by seeking solutions to the following sub-problems: (1) How can the domain-specific knowledge (DSK) semantics be separated from the MoE for a given domain? (2) How do we define a generic model of execution (GMoE) of the middleware so that it is adaptable and realizes DSK operations to support delivery of services? (3) How do we validate the realization of DSK operations at runtime? Our research into the domain-specific middleware was done using an i-DSML for the user-centric communication domain, Communication Modeling Language (CML), and for microgrid energy management domain, Microgrid Modeling Language (MGridML). We have successfully developed a methodology to separate the DSK and GMoE of the middleware of a DSVM that supports specialization for a given domain, and is able to perform adaptation and validation at runtime.

<p>У овом раду приказанa je анализа резултата истраживања,<br />постојећих техничких решења и искустава из IT индустрије у<br />појединачним и комбинованим областима: дистрибуирани<br />развој софтвера и управљање софтверским пројектима у<br />дистрибуираном окружењу, метричка заснованост управљања<br />софтверским пројектима, адатибилност у управљању агилним<br />софтверским пројектима, адаптибилни дистрибуираних<br />информациони системи.<br />Предложен је функционално-технолошки теоријски модел<br />софтверске подршке адаптибилног дистрибуираног<br />информационог система за подршку управљању реализацијом<br />софтверских пројеката. Предложени су приступи у процесу<br />развоја система у оквиру креирања модела софтверских<br />функција и концептуалног модела података. Предложени су<br />метрички модели за евалуацију артефакта у развоју софтвера у<br />области развоја информационих система, као и метрички<br />модели за процену трајања пројекта и мониторинг успеха<br />процеса у дистрибуираном развоју софтвера.<br />Описана је имплементација почетног прототипа система<br />(реализованог као web апликација www.it-project.rs), у оквиру<br />ког су реализоване основне функције система. Извршена су<br />емпиријска истраживања могућности коришћења прототипа<br />система у настави и професионалном усавршавању студената и<br />анализа резултата пробног коришћења прототипа од стране ИТ<br />кадрова уз пратеће анкетирање. Извршена је бенчмаркинг<br />анализа најчешће коришћених расположивих алата издвојених<br />анкетирањем. Извршена је анализа резултата емпиријских<br />истраживања у односу на ефикасност примене прототипа.<br />Извршена је анализа резултата примене метричких модела за<br />евалуацију артефакта развоја софтвера, мониторинг успеха<br />процеса и процену трајања пројекта у делу процеса<br />имплементације софтвера. Реализовано је унапређење<br />прототипа у односу на претходно дефинисане захтеве<br />функционално-технолошког теоријског модела система.</p> / <p>U ovom radu prikazana je analiza rezultata istraživanja,<br />postojećih tehničkih rešenja i iskustava iz IT industrije u<br />pojedinačnim i kombinovanim oblastima: distribuirani<br />razvoj softvera i upravljanje softverskim projektima u<br />distribuiranom okruženju, metrička zasnovanost upravljanja<br />softverskim projektima, adatibilnost u upravljanju agilnim<br />softverskim projektima, adaptibilni distribuiranih<br />informacioni sistemi.<br />Predložen je funkcionalno-tehnološki teorijski model<br />softverske podrške adaptibilnog distribuiranog<br />informacionog sistema za podršku upravljanju realizacijom<br />softverskih projekata. Predloženi su pristupi u procesu<br />razvoja sistema u okviru kreiranja modela softverskih<br />funkcija i konceptualnog modela podataka. Predloženi su<br />metrički modeli za evaluaciju artefakta u razvoju softvera u<br />oblasti razvoja informacionih sistema, kao i metrički<br />modeli za procenu trajanja projekta i monitoring uspeha<br />procesa u distribuiranom razvoju softvera.<br />Opisana je implementacija početnog prototipa sistema<br />(realizovanog kao web aplikacija www.it-project.rs), u okviru<br />kog su realizovane osnovne funkcije sistema. Izvršena su<br />empirijska istraživanja mogućnosti korišćenja prototipa<br />sistema u nastavi i profesionalnom usavršavanju studenata i<br />analiza rezultata probnog korišćenja prototipa od strane IT<br />kadrova uz prateće anketiranje. Izvršena je benčmarking<br />analiza najčešće korišćenih raspoloživih alata izdvojenih<br />anketiranjem. Izvršena je analiza rezultata empirijskih<br />istraživanja u odnosu na efikasnost primene prototipa.<br />Izvršena je analiza rezultata primene metričkih modela za<br />evaluaciju artefakta razvoja softvera, monitoring uspeha<br />procesa i procenu trajanja projekta u delu procesa<br />implementacije softvera. Realizovano je unapređenje<br />prototipa u odnosu na prethodno definisane zahteve<br />funkcionalno-tehnološkog teorijskog modela sistema.</p> / <p>Тhis work presents analysis of research results, existing<br />technical solutions and experiences from IT industry in<br />separate and combined fields of: distributed software<br />development, software project management in distributed<br />environment, metric-based software project management,<br />adaptability in management of agile software projects, as<br />well in the field of adaptable distributed information<br />systems.<br />Functional-technological theoretical model of software<br />support to adaptable distributed information system for<br />software projects realization has been proposed. Approaches<br />to creating software functions model and conceptual data<br />model within the process of the system development were<br />proposed. Metric models for evaluation of artefacts created<br />in software development within information system<br />development, as well as metric models for project duration<br />estimation and monitoring of process success in distributed<br />software development were proposed.<br />Implementation of initial prototype of the system<br />(developed as web application www.it-project.rs), that<br />includes basic functions, was described. Empirical research<br />on possibilities for using prototype in educational<br />environment and professional improvement of students, as<br />well as analysis of results from using the prototype by IT<br />professionals, with additional questionnaire, has been<br />conducted. Benchmarking analysis of most frequently used<br />available tools, extracted from questionnaire results, has<br />been performed. Analysis of empirical research results has<br />been performed in the context of prototype using efficiency.<br />Analysis of results in metric models application in evaluation<br />of software development artefacts, process success<br />monitoring and project duration estimation, in software<br />implementation process part, has been conducted.<br />Improvement of prototype has been implemented according<br />to requirements defined in previously proposed functionaltechnological<br />theoretical model of the system.</p>