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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1751-1760 订阅

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An Efficient parallel PathStack Algorithm for processing XML Twig Queries on Multi-core Systems

An Efficient Parallel PathStack Algorithm for Processing XML...

引用

15th international conference on Database Systems for Advanced Applications

作者： Feng, Jianhua Liu, Le Li, Guoliang Li, Jianhui Sun, Yuanhao Tsinghua Univ Dept Comp Sci & Technol Tsinghua Natl Lab Informat Sci & Technol Beijing 100084 Peoples R China

ISBN: (纸本)9783642120251

Multi-cores are more and more popular recently and have being altered the course of computing. Traditional XPath query evaluation algorithms cannot take full advantages of multi-cores, and it is not straightforward to adapt such algorithms on multi-cores. In this paper, we propose an efficient parallel Path Stack algorithm, named P-PathStack. for processing XML twig queries. the algorithm first efficiently partitions input element lists into multiple buckets, and then processes data in each bucket in parallel. With efficient partitioning method, our proposed algorithm can avoid many useless elements and achieve very good speedup ratio. We have implemented the algorithm and experimental results show that it achieves high performance and speedup ratio.

关键词： Multi-core Partition parallel PathStack

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Optimizing application mapping algorithms for NoCs through a unified framework

Optimizing application mapping algorithms for NoCs through a...

引用

作者： Radu, Ciprian Vintan, Lucian Advanced Computer Architecture and Processing Systems Research Lab. Lucian Blaga University Sibiu Romania

ISBN: (纸本)9781424473359

this paper presents a preliminary PhD research towards developing a framework to evaluate and optimize application mapping algorithms for Network-on-Chip architectures. Several such algorithms have been proposed for mapping the threads of a parallel application on a NoC architecture. However, the performance of those algorithms is evaluated only on some specific NoC designs. A unified approach for evaluating such algorithms allows a better comparison of their performance and can potentially lead to some optimizations. the proposed framework is intended to be flexible so that the algorithms can be tested on different NoC designs. To this end, a scalable and flexible Network-on-Chip simulator is proposed. Some preliminary results obtained with this simnlator are presented, too. they show the flexibility of this simulator and that it is feasible for addressing the application mapping problem in a unified manner.

关键词： Network-on-chip

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Automatically Tuning Sparse Matrix-Vector Multiplication for GPU architectures

Automatically Tuning Sparse Matrix-Vector Multiplication for...

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5th international conference on High Performance Embedded architectures and Compilers

作者： Monakov, Alexander Lokhmotov, Anton Avetisyan, Arutyun Inst Syst Programming RAS 25 Solzhenitsyna St Moscow 109004 Russia Imperial Coll London Dept Computat London SW7 2AZ England

ISBN: (纸本)9783642115141

Graphics processors are increasingly used in scientific applications due to their high computational power, which comes from hardware with multiple-level parallelism and memory hierarchy. Sparse matrix computations frequently arise in scientific applications, for example, when solving PDEs on unstructured grids. However, traditional sparse matrix algorithms are difficult to efficiently parallelize for GPUs due to irregular patterns of memory references. In this paper we present a new storage format for sparse matrices that better employs locality, has low memory footprint and enables automatic specialization for various matrices and future devices via parameter tuning. Experimental evaluation demonstrates significant speedups compared to previously published results.

关键词： Graphics processing unit

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algorithms and architectures for parallel processing - 9th international conference, ICA3PP 2009, Proceedings

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9th international conference on algorithms and architectures for parallel processing, ICA3PP 2009

ISBN: (纸本)3642030947

the proceedings contain 81 papers. the topics discussed include: length encoded secondary structure profile for remote homologous protein detection;a process scheduling analysis model based on grid environment;a resource broker with cross grid information services on computational multi-grid environments;implementation of a performance-based loop scheduling on heterogeneous clusters;a software transactional memory service for grids;an empirical study on the performance issues on the clustered client-server computing environment;energy-efficient clustering in wireless sensor networks;maximally local connectivity on augmented cubes;a cluster-based data routing for wireless sensor networks;and a energy efficient scheduling base on dynamic voltage and frequency scaling for multi-core embedded real-time system.

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GPU COLLISION DETECTION USING SPATIAL SUBDIVISION WIth APPLICATIONS IN CONTACT DYNAMICS

GPU COLLISION DETECTION USING SPATIAL SUBDIVISION WITH APPLI...

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7th international conference on Multibody Systems, Nonlinear Dynamics and Control

作者： Mazhar, Hammad Univ Wisconsin Dept Mech Engn Madison WI 53706 USA

ISBN: (纸本)9780791849019

this work concentrates on the issue of rigid body collision detection, a critical component of any software package employed to approximate the dynamics of multibody systems with frictional contact. this paper presents a scalable collision detection algorithm designed for massively parallel computing architectures. the approach proposed is implemented on a ubiquitous Graphics processing Unit (GPU) card and shown to achieve a 40x speedup over state-of-the art Central processing Unit (CPU) implementations when handling multi-million object collision detection. GPUs are composed of many (on the order of hundreds) scalar processors that can simultaneously execute an operation;this strength is leveraged in the proposed algorithm. the approach can detect collisions between five million objects in less than two seconds;with newer GPUs, the capability of detecting collisions between eighty million objects in less than thirty seconds is expected. the proposed methodology is expected to have an impact on a wide range of granular flow dynamics and smoothed particle hydrodynamics applications, e.g. sand, gravel and fluid simulations, where the number of contacts can reach into the hundreds of millions.

关键词： Computer software Collisions (Physics) Hydrodynamics algorithms Flow (Dynamics) Particulate matter Simulation Architecture Dynamics (Mechanics) Contact dynamics Sands Scalars Engineering simulation Graphics processing units Fluids Multibody systems Gravel

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Optimizing the pre-processing of scientific visualization techniques using QEF 8

Optimizing the pre-processing of scientific visualization te...

引用

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

作者： Oliveira, D. Porto, F. Giraldi, G. Schulze, B. Pinto, R.C.G. National Laboratoy for Scientific Computing Rua Getulio Vargas 333 Quitandinha Petrópolis Rio de Janeiro Brazil Military Engeneering Institute - IME-RJ Rio de Janeiro Brazil

ISBN: (纸本)9781450304535

Scientific Visualization is a computer-based field concerned with techniques that allow scientists to create graphical rep- resentations from datasets generated by computational sim- ulations or acquisition instruments. To address the compu- tational cost of visualization tasks, specially for large datasets, researchers have explored grid environments as a platform for their parallel evaluation. It is however not trivial to adapt each different visualization technique to run in grid environments. A desirable alternative would separate the specificities of data and process distribution in grids from visualization computation logic. In this work we claim that the QEF (query evaluation framework) leverages scientific visualization computation with the above mentioned char- acteristics. Visualization computation techniques are mod- eled as operators in an algebra and integrated with a set of control operators that manage data distribution leading to a parallel QEP (query execution plan). We show the ben-efits of parallelization for two of those techniques: particle tracing and volume rendering. For these techniques, our ex- periments demonstrate many positive aspects of the solution presented, as well as opportunities for future work. Copyright 2010 ACM.

关键词： Middleware

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A massively parallel hardware for modular exponentiations using the m-ary method

A massively parallel hardware for modular exponentiations us...

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10th international conference algorithms and architectures for parallel processing, ICA3PP 2010

作者： Farias, Marcos Santana De Souza Raposo, S. Nedjah, Nadia De Macedo Mourelle, L. Department of Electronics Engineering and Telecommunications Engineering Faculty State University of Rio de Janeiro Brazil Department of System Engineering and Computation Engineering Faculty State University of Rio de Janeiro Brazil

ISBN: (纸本)3642131352

Most of cryptographic systems are based on modular exponentiation. It is performed using successive modular multiplications. One way of improving the throughput of a cryptographic system implementation is reducing the number of the required modular multiplications. Existing methods attempt to reduce this number by partitioning the exponent in constant or variable size windows. In this paper, in the purpose of further accelerating the computation of modular exponentiation, a concurrent novel approach is proposed along with hardware implementation of the concurrent m-ary method. We compare the proposed method to the sequential implementation. © Springer-Verlag Berlin Heidelberg 2010.

关键词： Cryptography

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A GPU Approach to the Simulation of Spatio-temporal Dynamics in Ultrasonic Resonators

A GPU Approach to the Simulation of Spatio-temporal Dynamics...

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8th international conference on parallel processing and Applied Mathematics

作者： Alonso-Jorda, Pedro Perez-Arjona, Isabel Sanchez-Morcillo, Victor J. Univ Politecn Valencia Inst Univ Aplicac Tecnol Informac Cno Vera S-N Valencia 46022 Spain Univ Politecn Valencia Inst Invest Para Gest Integrada Zonas Coste Gandia 46730 Spain

ISBN: (纸本)9783642143892

In this work we present the implementation of an application to simulate the evolution of pressure and temperature inside a cavity when acoustic energy is injected, a physical system currently under intensive research. the particular features of the equations of the model makes the simulation problem very stiff and time consuming. However, intrinsic parallelism makes the application suitable for implementation in GPUs providing the researchers with a very useful tool to study the problem at a very reasonable price. In our experiments the problem was solved in less than half the time required by CPUs.

关键词： Graphics processing unit

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A Comparative Study on the Performance of the parallel and Distributing Computing Operation in MatLab

A Comparative Study on the Performance of the Parallel and D...

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24th IEEE international conference on Advanced Information Networking and Applications (AINA)

作者： Goryawala, Mohammed Guillen, Magno R. Bhatt, Ruchir Mcgoron, Anthony Adjouadi, Malek Florida Int Univ Dept Biomed Engn 10555 W Flagler StECE 2220 Miami FL 33174 USA Florida Int Univ Dept Elect & Comp Engn Miami FL 33174 USA

ISBN: (纸本)9780769540184

this study describes the performance results on testing MatLab applications using the parallel computing and the distributed computing toolboxes under different platforms with different hardware and operating systems. Each trial was executed keeping the hardware fixed and changing the operating system to obtain unbiased results. To standardize the benchmarking test, Fast Fourier Transform (FFT), discrete cosine transform (DCT), edge detection and matrix multiplication algorithms were executed. the results show that the leveraging of multicore platforms can speed up considerably the processing of images through the use of parallel computing tools in MatLab. Two different system hardware platforms (systems 1 and 2) were used in a series of experiments. Four rounds of experiments were performed benchmarking the FFT algorithm using the parallel tool box, by changing system platform, number of workers, image size and number of images. the results of the ANOVA test suggest that although there is no statistical significance on the factor represented by the operating system (OS) on system 1, the OS plays a significant roll on system 2. Moreover, on both systems there is statistical significance on the factors represented by the number of workers utilized and the number of images processed, yielding more than a 500% performance increase by using 8 MatLab workers on a dual quad-core machine.

关键词： MatLab HPC parallel computing distributed computing performance metrics

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High dimensional image categorization

High dimensional image categorization

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6th international conference on Advanced Data Mining and Applications, ADMA 2010

作者： Poulet, François Pham, Nguyen-Khang University of Rennes I - IRISA Campus de Beaulieu 35042 Rennes Cedex France Cantho University 1 Ly Tu Trong street Cantho Viet Nam

ISBN: (纸本)3642173152

We are interested in varying the vocabulary size in the image categorization task with a bag-of-visual-words to investigate its influence on the classification accuracy in two cases: in the first one, both the test-set and the training set contains the same objects (with only different view points in the test-set) and the second one where objects in the test-set do not appear at all in the training set (only other objects from the same category appear). In order to perform these tasks, we need to scale-up the algorithms used to deal with millions data points in hundred of thousand dimensions. We present k-means (used in the quantization step) and SVM (used in the classification step) algorithms extended to deal with very large datasets. these new incremental and parallel algorithms can be used on various distributed architectures, like multi-thread computer, cluster or GPU (graphics processing units). the efficiency of the approach is shown with the categorization of the 3D-Dataset from Savarese and Fei-Fei containing about 6700 images of 3D objects from 10 different classes. the obtained incremental and parallel SVM algorithm is several orders of magnitude faster than usual ones (like lib-SVM, SVM-perf or CB-SVM) and the incremental and parallel k-means is at least one order of magnitude faster than usual implementations. © 2010 Springer-Verlag.

关键词： Graphics processing unit

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