Paolo Narváez

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Single-ISA heterogeneous multi-core processors are typically composed of small (e.g., in-order) power-efficient cores and big (e.g., out-of-order) high-performance cores. The effectiveness of heterogeneous multi-cores depends on how well a scheduler can map workloads onto the most appropriate core type. In general, small cores can achieve good performance(More)
A key functionality in today's widely used interior gateway routing protocols such as OSPF and IS-IS involves the computation of a shortest path tree (SPT). In many existing commercial routers, the computation of an SPT is done from scratch following changes in the link states of the network. As there may coexist multiple SPTs in a network with a set of(More)
The available bit rate (ABR) service has been developed to support data traac over ATM networks and provide end-to-end congestion control at the ATM layer. However, as most data applications today are only connected to ATM via legacy networks, simulation results in past ATM Forum contributions suggest that ABR may still cause congestion at network edges and(More)
Link-state protocols such as OSPF are the dominant routing technology in today’s Internet. Despite their many advantages, these protocols require the flooding of new information across the entire routing area after changes in any link state (e.g. link failures). As the routing area grows or the frequency of link-state changes increases, the overhead (in(More)
Heterogeneous architectures with single-ISA asymmetric cores have the potential to improve both the performance and energy efficiency of software execution by dynamically selecting the most appropriate core type to run each execution thread. In this paper, we propose a trace-based methodology to explore power and performance benefits of single-ISA(More)
This paper presents a methodology based on a genetic algorithm guided by a multiobjective index to evaluate the optimal siting and sizing of Distributed Generation in an electrical system. The objective function consists in improving the voltage profile, minimizing active power losses, emissions and reducing the investment costs. The proposed methodology(More)