Antonio J. García-Loureiro

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An efficient implementation of the density-gradient (DG) approach for the finite element and finite difference methods and its application in drift-diffusion (D-D) simulations is described in detail. The new, second-order differential (SOD) scheme is compatible with relatively coarse grids even for large density variations thus applicable to device(More)
Irregular codes are present in many scientific applications, such as finite element simulations. In these simulations the solution of large sparse linear equation systems is required, which are often solved using iterative methods. The main kernel of the iterative methods is the sparse matrix–vector multiplication which frequently demands irregular data(More)
Nowadays, there are several open-source solutions for building private, public and even hybrid clouds such as Eucalyptus, Apache Cloud Stack and Open Stack. KVM is one of the supported hypervisors for these cloud platforms. Different KVM configurations are being supplied by these platforms and, in some cases, a subset of CPU features are being presented to(More)
Currently, there are an increasing number of open-source solutions for building Clouds. The performance of the Virtual Machines running in these Clouds is a key point. The way the Virtual Machines are created in Clouds can have important effects upon their disk I/O operations. We have selected CloudStack platform to study the disk I/O performance for KVM(More)
Cloud computing has grown in popularity in recent years, partly due to the availability of different open source solutions for building private, public and even hybrid clouds, as Apache CloudStack. One of the challenges posed by cloud applications is Quality-of-Service (QoS) management. In the particular case of Apache CloudStack, Service Offerings are(More)