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检索条件"任意字段=8th International Conference on Algorithms and Architectures for Parallel Processing"

共 2884 条记录，以下是1721-1730 订阅

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Proceedings of the 8th international Workshop on Middleware for Grids, Clouds and e-Science, MGC 2010 - Held at the ACM/IFIP/USENIX 11th international Middleware conference

Proceedings of the 8th International Workshop on Middleware ...

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8th international Workshop on Middleware for Grids, Clouds and e-Science, MGC 2010

ISBN: (纸本)9781450304535

the proceedings contain 10 papers. the topics discussed include: CRM-OO-VM: a checkpointing-enabled Java VM for efficient and reliable e-science applications in grids;multi-domain grid/cloud computing through a hierarchical component-based middleware;a scheduling model for workflows on grids and clouds;adaptive threshold-based approach for energy-efficient consolidation of virtual machines in cloud data centers;resource allocation across multiple cloud data centers;optimizing the pre-processing of scientific visualization techniques using QEF;a middleware for parallel processing of large graphs;Mooshabaya - mashup generator for XBaya;the dark energy survey data management system as a data intensive science gateway;and BISSA: empowering web-gadget communication with tuple spaces.

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Design space exploration for memory subsystems of VLIW architectures

Design space exploration for memory subsystems of VLIW archi...

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5th IEEE international conference on Networking, Architecture and Storage, NAS 2010

作者： Jungeblut, thorsten Sievers, Gregor Porrmann, Mario Rückert, Ulrich Heinz Nixdorf Institute University of Paderborn Germany Cognitive Interaction Technology Center of Excellence Bielefeld University Germany

ISBN: (纸本)9780769541341

In this work we present a design space exploration of the memory subsystem of our configurable CoreVA VLIW architecture. the development of resource efficient processor architectures is based on a two-stage tool flow using a high-level processor specification as a reference. We evaluate several memory configurations like one memory port or two memory ports, as well as different write-miss-allocation modes. Applications ranging from LTE protocol stack over baseband processing up to cryptography and multimedia are evaluated in terms of execution time and energy efficiency. Analyses have shown that the application specific configuration of the memory subsystem can improve energy by up to 25 %. Our environment allows the rapid profiling and evaluation of algorithms to choose the most efficient configuration. © 2010 IEEE.

关键词： Very long instruction word architecture

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Particle Model of Tumor Growth and Its parallel Implementation

Particle Model of Tumor Growth and Its Parallel Implementati...

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8th international conference on parallel processing and Applied Mathematics

作者： Wcislo, Rafal Dzwinel, Witold AGH Univ Sci & Technol Inst Comp Sci Krakow Poland

ISBN: (纸本)9783642143892

We present a concept of a parallel implementation of a novel 3-D model of tumor growth. the model is based on particle dynamics, which are building blocks of normal, cancerous and vascular tissues. the dynamics of the system is driven also by the processes in microscopic scales (e.g. cell life-cycle), diffusive substances nutrients and TAF (tumor angiogenic factors) - and blood flow. We show that the cell life-cycle (particle production and annihilation), the existence of elongated particles, the influence of continuum fields and blood flow in capillaries, makes the model very tough for parallelization in comparison to standard MD codes. We present preliminary timings of our parallel implementation and we discuss the perspectives of our approach.

关键词： Blood

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Energy Considerations for Divisible Load processing

Energy Considerations for Divisible Load Processing

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8th international conference, PPAM 2009

作者： Drozdowski, Maciej Poznan Univ Tech Inst Comp Sci PL-60965 Poznan Poland

ISBN: (纸本)9783642144028

In this paper we analyze energy usage in divisible load processing Divisible load theory (DLT) applies to computations which can be divided into parts of arbitiary sizes, and the parts can be independently processed in parallel the shortest schedule for divisible load processing is determined by the speed of computation and communication Energy usage for such a time-optimum schedule is analyzed in this paper We propose a simple model of energy consumption Two states of the computing system ale taken into account an active state and an idle state with reduced energy consumption Energy consumption is examined as a function of system parameters We point out possible ways of energy conservation It is demonstrated that energy can be saved by use of parallel processing

关键词： Energy-efficient computing performance evaluation divisible loads

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Empirical Analysis of parallelism Overheads on CMPs

Empirical Analysis of Parallelism Overheads on CMPs

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8th international conference on parallel processing and Applied Mathematics

作者： Marowka, Ami Bar Ilan Univ Dept Comp Sci IL-52100 Ramat Gan Israel

ISBN: (纸本)9783642143892

OpenMP and Intel threading Building Blocks (TBB) are two parallel programming paradigms for multicore processors. they have a lot in common but were designed in mind for different parallel execution models. Comparing the performance gain of these two paradigms depends to a great extent on the parallelization overheads of their parallel mechanisms. parallel overheads are inevitable and therefore understanding their potential costs can help developers to design more scalable applications. this paper presents a comparative study of OpenMP and TBB parallelization overheads. the study was conducted on a dual-core machine with two different compilers;Intel compiler and Microsoft Visual Studio C++ 2008, and shows that Intel compiler outperforms Microsoft compiler. Nevertheless, the relative performance of TBB versus OpenMP is mainly depends on the implementation of the parallel constructs of a specific compiler.

关键词： OpenMP TBB Benchmarks Multicore parallel Overhead

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Extracting Both Affine and Non-linear Synchronization-Free Slices in Program Loops

Extracting Both Affine and Non-linear Synchronization-Free S...

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8th international conference on parallel processing and Applied Mathematics

作者： Bielecki, Wlodzimierz Palkowski, Marek Tech Univ Szczecin Fac Comp Sci PL-70210 Szczecin Poland

ISBN: (纸本)9783642143892

An approach is presented permitting for extracting both affine and non-linear synchronization-free slices in program loops. It requires an exact dependence analysis. To describe and implement the approach, the dependence analysis by Pugh and Wonnacott was chosen where dependences are found in the form of tuple relations. the approach is based on operations on integer tuple relations and sets and it has been implemented and verified by means of the Omega project software. Results of experiments with the UTDSP benchmark suite are discussed. Speed-up and efficiency of parallel code produced by means of the approach is studied.

关键词： synchronization-free slices free-scheduling parallel shared memory programs dependence graph

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Evaluation of streaming aggregation on parallel hardware architectures 10

Evaluation of streaming aggregation on parallel hardware arc...

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4th ACM international conference on Distributed Event-Based Systems, DEBS 2010

作者： Schneidert, Scott Andrade, Henrique Gedik, Buǧra Wu, Kun-Lung Nikolopoulos, Dimitrios S. Virginia Tech. Department of Computer Science Blacksburg VA United States T.J. Watson Research Center IBM Research Hawthorne NY United States Institute for Computer Science Foundation for Research and Technology - Hellas Heraklion Greece

ISBN: (纸本)9781605589275

We present a case study parallelizing streaming aggregation on three different parallel hardware architectures. Aggregation is a performance-critical operation for data summarization in stream computing, and is commonly found in sense-and-respond applications. Currently available commodity parallel hardware provides promise as accelerators for streaming aggregation. However, how streaming aggregation can map to the different parallel architectures is still an open question. Streaming aggregation is obviously data parallel, but in practice its performance relies more on efficient data movement than computation, as we will demonstrate. Furthermore, we used workloads such as stock market data, which introduces unique data distribution problems. the three parallel architectures we use in our study are an Intel Core 2 Quad processor, an Nvidia GTX 285 GPU and the IBM PowerXCell 8i, an enhanced version of the Cell Broadband Engine architecture. Our implementations use OpenMP, CUDA and Cellgen (a compiler for OpenMP-like support on Cell) respectively. We find that the Cell's programmable local storage, and its low latency, high bandwidth access to main memory are best suited for parallelizing streaming aggregation. GPUs in the future can overcome the latency and bandwidth limitations by being fully integrated in the system's memory hierarchy. In order to attain good performance on existing parallel architectures, we find that developers must characterize their problem in terms of communication versus computation costs;memory access patterns, including assessing whether their algorithms reuse data;and the granularity of data access patterns. © 2010 ACM.

关键词： parallel architectures

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parallel Implementation of Multidimensional Scaling Algorithm Based on Particle Dynamics

Parallel Implementation of Multidimensional Scaling Algorith...

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8th international conference on parallel processing and Applied Mathematics

作者： Pawliczek, Piotr Dzwinel, Witold AGH Univ Sci & Technol Inst Comp Sci Krakow Poland

ISBN: (纸本)9783642143892

We propose here a parallel implementation of multidimensional scaling (MDS) method which can be used for visualization of large datasets of multidimensional data.. Unlike in traditional approaches, which employ classical minimization methods for finding the global optimum of the "stress function", we use a heuristic based on particle dynamics. this method allows avoiding local minima and is convergent to the global one. However, due to its O(N-2) complexity, the application of this method in data mining problems involving large datasets requires efficient parallel codes. We show that employing both optimized Taylor's algorithm and hybridized model of parallel computations, our solver is efficient enough to visualize multidimensional data sets consisting of 10(4) feature vectors in time of minutes.

关键词： data mining multidimensional scaling method of particles parallel algorithm

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A GPU implementation for two MIMO-OFDM detectors

A GPU implementation for two MIMO-OFDM detectors

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2010 10th international conference on Embedded Computer Systems: architectures, Modeling and Simulation, IC-SAMOS 2010

作者： Nyländen, Teemu Janhunen, Janne Silvén, Olli Juntti, Markku Computer Science and Engineering Laboratory University of Oulu Finland Centre for Wireless Communications University of Oulu Finland

ISBN: (纸本)9781424479382

Two real-valued signal models based on selective spanning with fast enumeration (SSFE) and layered orthogonal lattice detector (LORD) algorithms are implemented on a Nvidia graphics processing unit (GPU). A 2 x 2 multiple-input multiple-output (MIMO) antenna system with 16-quadrature amplitude modulation (16-QAM) is assumed. the chosen level update vector for SSFE is based on computer simulation results carried out in MATLAB environment. We implemented the algorithms with Nvidia Quadro FX 1700 GPU and achieved a throughput of 36.06 Mbps for SSFE and 16.8 Mbps for LORD. the results show that the general-purpose graphics processing unit (GPGPU) has the potential to achieve high throughput, presuming a detection algorithm that allows efficient parallel processing. the latency of the control code and partial Euclidean distance (PED) calculations are very small-scale, but the latency of memory loads and stores to the GPUs global memory are significant. We also compare results from the trellis based detector implementation for GPU, where a more powerful GPU and a different detection algorithm are used. the GPUs offer superior computing power and programmability compared to the application specific software defined radio (SDR) designs implemented so far. ©2010 IEEE.

关键词： Graphics processing unit

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SPATIAL POWER DISTRIBUTION SIMULATION FOR NUCLEAR REACTOR

SPATIAL POWER DISTRIBUTION SIMULATION FOR NUCLEAR REACTOR

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8th international Industrial Simulation conference

作者： Janosy, Janos Sebestyen Kereszturi, Andras Hazi, Gabor Pales, Jozsef Vegh, Endre MTA KFKI Atom Energy Res Inst AEKI Simulator Dev Dept Budapest Hungary Atom Energy Engn Ltd Reactor Anal Dept Budapest Hungary Atom Energy Engn Ltd MTA KFKI AEKI Simulator Dev Dept Budapest Hungary Atom Energy Engn Ltd Budapest Hungary

ISBN: (纸本)9789077381557

Fuel assemblies are very expensive parts of the nuclear reactor. Initially they were used in Hungary for 3 years, now for 4 years and soon they will stay in the core for 5 years. Each year only 1/3rd, 1/4th later 1/5th of them is replaced, therefore the change of the fuel type is a lengthy process, with mixed cores used. the authorities require that the staff should be trained to each particular core before they operate it. For this reason the simulator should be upgraded to simulate the exact behavior of each core foreseen for the next 5 years. the RETINA code (Reactor thermo-hydraulics Interactive) is a 3D offline code, developed in our department.[5] KIKO3D - Neutron Kinetics 3D - has been developed in our Institute, too, in the Reactor Analysis Department [4]. Both of them should be integrated into our full-scope replica simulator, coupled, and stressed to operate parallel in real-time, using four hi-power processors [6]. the simulation-specific details are discussed in the paper.

关键词： NPP simulation parallel processing real-time simulation coupled thermo-hydraulics and neutron kinetics simulation

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