Programa de Doctorat en Arquitectura de Computadors: Recent submissions
Now showing items 221-240 of 272
Off-line and in-operation optical core networks planning
The ever increasing IP traffic volume has finally brought to light the high inefficiency of current wavelength-routed over rigid-grid optical networks in matching the client layer requirements. Such an issue results in the ...
Network traffic classification : from theory to practice
Since its inception until today, the Internet has been in constant transformation. The analysis and monitoring of data networks try to shed some light on this huge black box of interconnected computers. In particular, the ...
Scalability in extensible and heterogeneous storage systems
The evolution of computer systems has brought an exponential growth in data volumes, which pushes the capabilities of current storage architectures to organize and access this information effectively: as the unending ...
Hardware design of task superscalar architecture
Exploiting concurrency to achieve greater performance is a difficult and important challenge for current high performance systems. Although the theory is plain, the complexity of traditional parallel programming models in ...
Optimizing SIMD execution in HW/SW co-designed processors
SIMD accelerators are ubiquitous in microprocessors from different computing domains. Their high compute power and hardware simplicity improve overall performance in an energy efficient manner. Moreover, their replicated ...
Information dissemination in mobile networks
This thesis proposes some solutions to relieve, using Wi-Fi wireless networks, the data consumption of cellular networks using cooperation between nodes, studies how to make a good deployment of access points to optimize ...
Techniques for improving the performance of software transactional memory
Transactional Memory (TM) gives software developers the opportunity to write concurrent programs more easily compared to any previous programming paradigms and gives a performance comparable to lock-based synchronization ...
Multi-constraint scheduling of MapReduce workloads
In recent years there has been an extraordinary growth of large-scale data processing and related technologies in both, industry and academic communities. This trend is mostly driven by the need to explore the increasingly ...
Techniques to improve concurrency in hardware transactional memory
Transactional Memory (TM) aims to make shared memory parallel programming easier by abstracting away the complexity of managing shared data. The programmer defines sections of code, called transactions, which the TM system ...
CPU accounting in multi-threaded processors
In recent years, multi-threaded processors have become more and more popular in industry in order to increase the system aggregated performance and per-application performance, overcoming the limitations imposed by the ...
Scalable system software for high performance large-scale applications
In the last decades, high-performance large-scale systems have been a fundamental tool for scientific discovery and engineering advances. The sustained growth of supercomputing performance and the concurrent reduction in ...
Cache designs for reliable hybrid high and ultra-low voltage operation
Increasing demand for implementing highly-miniaturized battery-powered ultra-low-cost systems (e.g., below 1 USD) in emerging applications such as body, urban life and environment monitoring, etc., has introduced many ...
Business-driven resource allocation and management for data centres in cloud computing markets
Cloud Computing markets arise as an efficient way to allocate resources for the execution of tasks and services within a set of geographically dispersed providers from different organisations. Client applications and service ...
On the scalability limits of communication networks to the nanoscale
Nanosystems, integrated systems with a total size of a few micrometers, are capable of interacting at the nanoscale, but their short operating range limits their usefulness in practical macro-scale scenarios. Nanonetworks, ...
Reliability in the face of variability in nanometer embedded memories
In this thesis, we have investigated the impact of parametric variations on the behaviour of one performance-critical processor structure - embedded memories. As variations manifest as a spread in power and performance, ...
Optimization techniques for fine-grained communication in PGAS environments
Partitioned Global Address Space (PGAS) languages promise to deliver improved programmer productivity and good performance in large-scale parallel machines. However, adequate performance for applications that rely on ...
Improving the effective use of multithreaded architectures : implications on compilation, thread assignment, and timing analysis
This thesis presents cross-domain approaches that improve the effective use of multithreaded architectures. The contributions of the thesis can be classified in three groups. First, we propose several methods for thread ...
Improved self-management of datacenter systems applying machine learning
Autonomic Computing is a Computer Science and Technologies research area, originated during mid 2000's. It focuses on optimization and improvement of complex distributed computing systems through self-control and ...
File system metadata virtualization
The advance of computing systems has brought new ways to use and access the stored data that push the architecture of traditional file systems to its limits, making them inadequate to handle the new needs. Current challenges ...
Numerical solution of 3-D electromagnetic problems in exploration geophysics and its implementation on massively parallel computers
The growing significance, technical development and employment of electromagnetic (EM) methods in exploration geophysics have led to the increasing need for reliable and fast techniques of interpretation of 3-D EM data ...
