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This paper presents a new passive optical network (PON) architecture that applies an optical multicast capable switch (OMS) to direct wavelengths to a set of PON branches and enables them to share the transceivers in the central office (CO) on demand. The OMS is composed of fiber splitters and switching gates, and by controlling the on-off gates the wavelengths at the inputs can reach any outputs...
Increasing the utilization of many-core systems has been one of the forefront topics these last years. Although many-cores architectures were merely theoretical models few years ago, they have become an important part of the high performance computing market. The semiconductor industry has developed Graphical Processing Units (GPU) systems that provide access to many cores (i.e: Larrabee, Fermi or...
When dealing with multiple traffic classes, it is often difficult to define a single resource sharing criterion. For instance, VoIP flows require low delay and losses, whereas FTP traffic requires high throughput. In this paper, we propose to use the Mean Opinion Score (MOS) as a unifying criterion, and to share resources so as to keep the MOS of the various flows above an acceptable threshold whenever...
Large-scale data parallel applications such as web indexing, data mining demand plenty of computing and storage resources. As a widely adopted solution, hadoop partitions and distributes the large datasets into chunks across multiple nodes in clusters to process in parallel. For a single cluster node, typically there are several concurrently running applications, sharing and competing system CPU,...
The hierarchical scheduling framework (HSF) has been introduced as a design-time framework enabling compositional schedulability analysis of embedded software systems with real-time properties. In this paper a system consists of a number of semi-independent components called subsystems. Subsystems are developed independently and later integrated to form a system. To support this design process, our...
Job scheduling policies for HPC centers have been extensively studied during these last years, specially backfilling based policies. Almost all of these studies have been done using simulation tools. These tools evaluate the performance of scheduling policies using the workloads and the resource definition as an input. To the best of our knowledge, all the existent simulators use the runtime (either...
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