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检索条件"任意字段=13th IEEE International Symposium on Parallel and Distributed Processing with Applications"

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SEMPLAR: High-performance remote parallel I/O over SRB

SEMPLAR: High-performance remote parallel I/O over SRB

引用

5th ieee international symposium on Cluster Computing and the Grid (CCGrid 2005)

作者： Ali, N Lauria, M Ohio State Univ Dept Comp Sci & Engn Columbus OH 43210 USA

ISBN: (纸本)0780390741

One of the challenges in high-performance computing is to provide users with reliable, remote data access in a distributed, heterogeneous environment. the increasing popularity of high-speed wide area networks and centralized data repositories lead to the possibility of direct high-speed access to remote data sets from within a parallel application. In this paper we describe SEMPLAR, a library for remote, parallel I/O that combines the standard programming interface of MPI-IO with the remote storage functionality of the SDSC Storage Resource Broker (SRB). SEMPLAR relies on parallel TCP streams to maximize the remote data throughput in a design that preserves the parallelism of the access all the way from the storage to the application. We have provided I/O performance resultsfor a high-performance computing work-load on three different clusters. On the NCSA TeraGrid cluster the ROMIO perf benchmark attained an aggregate read bandwidth of 291Mbps with 18 processors. the NAS btio benchmark achieved an aggregate write bandwidth of 74Mbps with 16 processors. the benchmark results are encouraging and show that SEMPLAR provides applications with scalable, high-bandwidth I/O across wide area networks.

关键词： parallel processing systems

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Software-directed disk power management for scientific applications

Software-directed disk power management for scientific appli...

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19th ieee international parallel and distributed processing symposium, IPDPS 2005

作者： Son, S.W. Kandemir, M. Choudhary, A. CSE Department Pennsylvania State University University Park PA 16802 United States ECE Department Northwestern University Evanston IL 60208 United States

ISBN: (纸本)0769523129

Disk power consumption is becoming an increasingly important issue in high-end servers that execute large-scale data-intensive applications. In particular, array-based scientific codes can spend a significant portion of their power budget on the disk subsystem. Observing this, the prior research proposed several strategies, such as spining down to low-power modes or adjusting the speed of the disk in lower RPM, to reduce power consumption on the disk subsystem. A common characteristic of most of these techniques is that they are reactive, in the sense that they make their decisions based on the disk access patterns observed during execution. While such techniques are certainly useful and the published studies reveal that they can be very effective in some cases, one can conceivably achieve better results by adopting a proactive scheme. Focusing on array-intensive scientific applications, this paper makes two important contributions. First, it presents a compiler-driven proactive approach to disk power management. In this approach, the compiler analyzes the application code and extracts the disk access pattern. It then uses this information to insert explicit disk power management calls in the appropriate places in the code. It also preactivates a disk (placed into the low-power mode) before it is actually needed to eliminate the potential performance impact of disk power management. the second contribution of this paper is a code transformation approach that can be used to increase the savings coming from a disk power management scheme (whether reactive or proactive). Our experimental results with several scientific application codes show that both the proactive disk power management approach and the disk layout aware code transformations are beneficial from both power consumption and execution time perspectives.

关键词： Electric power utilization

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Enabling software DSM system for grid computing

Enabling software DSM system for grid computing

引用

8th international symposium on parallel Architectures, Algorithms and Networks, I-SPAN 2005

作者： Liang, Tyng-Yeu Wu, Chun-Yi Chang, Jyh-Biau Shieh, Ce-Kuen Fan, Pei-Hsin Department of Electrical Engineering National Kaohsiung University of Applied Sciences No.415 Chien-Kung Road Kaohsiung Taiwan Department of Electrical Engineering National Chung Kung University No. 1 Ta-Hsueh Road Tainan Taiwan

ISBN: (纸本)0769525091

In this study, we have successfully developed a grid-enabled software distributed shared memory called Teamster-G. this system provides users with not only a shared memory programming interface but also a transparent resource allocation service to easily develop applications and aggregate distributed resources for solving their problems on the grid environment. Moreover, since the communication cost of maintaining data-consistency is a big problem for the performance of the DSM applications, Teamster-G exploits a cluster cache scheme and a two-level consistency protocol to minimize the number of data-consistency messages transferred over wide area network. We will present the framework and the performance of Teamster-G in this paper. © 2005 ieee.

关键词： parallel processing systems

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distributed artificial neural network architectures

Distributed artificial neural network architectures

引用

19th international symposium on High Performance Computing Systems and applications, HPCS 2005

作者： Calvert, David Guan, Jiawen Computing and Information Science University of Guelph Guelph Ont. Canada

ISBN: (纸本)0769523439

the computational cost of training Artificial Neural Network (ANN) algorithms limits the use of large systems capable of processing complex problems. Implementing ANNs on a parallel or distributed platform to improve performance is therefore desirable. this work illustrates a method to predict and evaluate the performance of distributed ANN algorithms by analyzing the performance of the comparatively simple mathematical operations which are used to construct the ANN. the ANN algorithms are divided into simple components: matrix and vector multiplication, matrix processed through a function, competition in a matrix. these basic operational parts are examined individually and it is demonstrated that the computation processes of distributed Neural Networks can be derived from the composition of these basic operations. three popular network architectures are examined: Multi-Layer Perceptrons with Back-Propagation learning, Self-Organizing Map, and Radial Basis Functions network. © 2005 ieee.

关键词： Multilayer neural networks

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Performance implications of virtualization and hyper-threading on high energy physics applications in a grid environment

Performance implications of virtualization and hyper-threadi...

引用

19th ieee international parallel and distributed processing symposium, IPDPS 2005

作者： Gilbert, Laura Tseng, Jeff Newman, Rhys Iqbal, Saeed Pepper, Ronald Celebioglu, Onur Hsieh, Jenwei Cobban, Mark University of Oxford Oxford United Kingdom Dell Inc. 701E Parmer Lane Austin TX 78753 United States Dell Inc. Millbank House Western Road Bracknell RG12 1RW Berkshire United Kingdom

ISBN: (纸本)0769523129

the simulations used in the field of high energy physics are compute intensive and exhibit a high level of data parallelism. these features make such simulations ideal candidates for Grid computing. We are taking as an example the GEANT4 detector simulation used for physics studies within the ATLAS experiment at CERN. One key issue in Grid computing is that of network and system security, which can potentially inhibit the wide spread use of such simulations. Virtualization provides a feasible solution because it allows the creation of virtual compute nodes in both local and remote compute clusters, thus providing an insulating layer which can play an important role in satisfying the security concerns of all parties involved. However, it has performance implications. this study provides quantitative estimates of the visualization and hyper-threading overhead for GEANT on commodity clusters. Results show that virtualization has less than 15% run-time overhead, and that the best run time (with the non-SMP licence of ESX VMware) is achieved by using one virtual machine per CPU. We also observe that hyper-threading does not provide an advantage in this application. Finally, the effect of virtualization on run-time, throughput, mean response time and utilization is estimated using simulations.

关键词： Virtual reality

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Proceedings. 19th ieee international parallel and distributed processing symposium

Proceedings. 19th IEEE International Parallel and Distribute...

引用

international symposium on parallel and distributed processing (IPDPS)

作者： R.F. van der Wijngaart M. Frumkin V.C. Bhavsar E. Aubanel T. Kielmann Vrije Univ. Amsterdam

HIPS-HPGC 2005 is a full-day workshop, focusing on high-performance grid computing and high-level parallel programming models. the papers deal with component models and service-based systems for grids, emphasizing on experiences with existing systems. Also the papers report on the state of the art of grid applications, both for academic and industrial problems

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Design issues of a novel toolkit for parallel application performance monitoring and analysis in cluster and grid environments

Design issues of a novel toolkit for parallel application pe...

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8th international symposium on parallel Architectures, Algorithms and Networks, I-SPAN 2005

作者： Li, Kuan-Ching Wang, Hsiao-Hsi Chen, Chiou-Nan Liu, Chun-Chieh Chang, Chia-Fu Hsu, Chia-Wen Hung, Sheng-Shiang Parallel and Distributed Processing Center Department of Computer Science and Information Management Providence University Shalu Taichung 43301 Taiwan Laboratory of Bioinformatics and Computational Biology Department of Computer Science National Tsing Hua University Hsinchu 30013 Taiwan

ISBN: (纸本)0769525091

the low-cost and availability of network of workstations have made them attractive solution for high performance computing. Striking progress of network technology is enabling high-performance global computing, with the utilization of cluster and grid technologies, in which computational and data resources in a local or wide area network are transparently employed to solve large-scale problems. In this paper, we present implementation and design rationale of Visuel* toolkit for performance measurement and analysis of parallel applications in cluster and grid environments. Most of performance visualization tools available today for high-performance platforms show solely system performance data (e.g., CPU load, memory usage, network bandwidth, server average load), and thus, being suitable for visualization of computing platform system activities. the Visuel toolkit is web-based interface designed to show performance, activities of all computing nodes of a cluster or grid computing platform involved in the execution of a parallel application, such as CPU load level and memory usage of each computing node. In addition, this toolkit is able to display comparative performance data visualizations generated from a number of executions of an application under investigation, analyzing the performance of different implementations. Evaluations using this toolkit show that it outperforms in easing the process of investigation and implementation of parallel applications, in effective way. © 2005 ieee.

关键词： Computer workstations

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An application analysis framework for polymorphic chip multiprocessors

An application analysis framework for polymorphic chip multi...

引用

international symposium on parallel and distributed processing (IPDPS)

作者： A. thomas K. Olukotun University of Stanford USA

the SAPIENT parallel analysis framework facilitates the efficient transformation of sequential applications into multilevel parallel applications that can be executed on polymorphic chip multiprocessor architectures. We demonstrate how application characteristics are used to detect thread and data level parallelism in sequential applications and estimate parallel performance. We further demonstrate how SAPIENT determines the combination of application parallelism and polymorphic architecture configuration that maximizes performance. As an example, we present a detailed analysis of parallelism for an MPEG-2 decoder. We further summarize results for six other multimedia applications, identifying the presence of data and thread level parallelism, evaluating performance, and suggesting architecture configurations for each.

关键词： Yarn Programming profession Decoding Costs Program processors Automatic control Hardware parallel programming Performance evaluation distributed processing

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Bioinformatics on a heterogeneous Java distributed system

Bioinformatics on a heterogeneous Java distributed system

引用

international symposium on parallel and distributed processing (IPDPS)

作者： A.J. Page T.M. Keane T.J. Naughton Department of Computer Science National University of Ireland Maynooth Ireland

A programmable Java distributed system, which utilises the free resources of a heterogeneous set of computers linked together by a network, has been developed. the system has been successfully deployed on over 200 computers, which were distributed over a number of locations, and has been successfully used to process bioinformatics, biomedical engineering, and cryptography applications. We present two bioinformatics applications, DSEARCH, which performs sensitive database and DPRml which performs distributed phylogeny reconstruction by maximum likelihood.

关键词： Bioinformatics Java Biomedical computing distributed computing Application software Computer networks Biomedical engineering Cryptography distributed databases Phylogeny

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Synthetic simulation of mesh-based parallel applications driven by fine-grained profiling

Synthetic simulation of mesh-based parallel applications dri...

引用

international symposium on parallel and distributed processing (IPDPS)

作者： Q. Liu A.S. Deshmukh K.A. Tomko Department of Electrical and Computer Engineering and Computer Science University of Cincinnati Cincinnati OH USA

We are interested in discovering the intrinsic dynamics of parallel applications, which are independent of runtime environment, to aid in the development of appropriate tuning policies, especially dynamic load balancing policies. Based on the novel idea of profiling mesh-based applications at a fine granularity of each mesh element, this paper proposes a synthetic application simulator which is driven by a series of application signatures mapping to the mesh structure. By integrating the ZOLTAN library into the system, our simulator provides a convenient test bed for developing and evaluating load balancing policies.

关键词： Performance analysis Application software Load management Concurrent computing distributed computing Computational modeling Computer science Runtime environment Libraries System testing

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