Guilherme Carvalho Januario

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Considering the increasing importance of carbon free networking solutions, several energy-efficient networking systems have been proposed and evaluated in literature. One significant challenge is how to encompass actions targeting energy savings and possible corresponding degradations in network QoS (Quality of Service). This paper presents an(More)
Energy efficiency features are being integrated in network protocols and management systems. Simulations can provide in put on how a particular algorithm would perform in different network conditions. However, building an environment that is able to comprehensively account for interactions between different network functions is difficult. A combination of(More)
The identification of redundant computation is in general undecidable and prevents the obtainment of an ideal case as reference to the measurement of the remaining unexploited potential for redundancy removal and to the evaluation of code optimization effectiveness. This paper presents a methodology for optimization effectiveness analysis by observing the(More)
Energy efficiency features are being integrated in network protocols and management systems in order to make the infrastructure more sustainable and, at the same time, address the growing users' demand. Many of such features affect the network in different ways, thus yielding trade-offs. They can affect the reliability and availability of the network when(More)
We present an energy-efficient implementation of RGB-D simultaneous localization and mapping (SLAM) by applying approximate computing (AC) techniques such as loop perforation (LP) and reduced precision (RP). To reduce processing time and power consumption, LP and RP were applied to the two most computationally challenging portion of the multi-kernel(More)
A technique to speed up stencil computation is introduced. Computation and data reuse schemes are developed for its application to 1- and 3-dimensional stencils. The approach traverses the data domain fewer times than a state-of-the-art, straightforward iterative stencil implementation would. Performance results are shown for a variety of platforms,(More)
The energy demand for operating Information and Communication Technologies is growing, implying in high operational costs and consequent carbon emissions. Both in datacenters and in telecom infrastructures, the networks represent a significant amount of energy spending. This implies in an increased demand for energy efficiency, and several functionalities(More)