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A hierarchical BSP model supporting processor locality

A hierarchical BSP model supporting processor locality

引用

International conference on parallel and distributed Systems (ICPADS)

作者： Hojung Cha Dongho Lee Department of Computer Science Kwangwoon University South Korea

ISBN: (纸本)0818682272

The paper presents a parallel computing model, called H-BSP, which adds a hierarchical concept to the BSP (Bulk Synchronous parallel) computing model. A H-BSP program consists of a number of BSP groups which are dynamically created at run time and executed in a hierarchical fashion. H-BSP allows the algorithm designer to develop a more efficient algorithm by utilizing processor locality in the program. The paper describes the structure of the H-BSP model, complexity analysis and an example of the H-BSP algorithm. Also presented are the performance characteristics of the H-BSP algorithm based on simulation analysis. Simulation results show that H-BSP model takes advantages of processor locality and performs well in low bandwidth networks or in a constant valence architecture such as a 2 dimensional mesh. It is also proved that H-BSP model can predict algorithm performance better than the BSP model due to its locality preserving nature.

关键词： Concurrent computing Hardware Computational modeling Phase change random access memory Algorithm design and analysis parallel processing Predictive models Manufacturing Computer science Analytical models

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5th European Users Group Meeting on parallel Virtual Machine and Message Passing Interface, PVM/MPI 1998

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5th European Meeting of the parallel Virtual Machine and Message Passing Interface, EuroPVM/MPI 1998

ISBN: (纸本)3540650415

The proceedings contain 49 papers. The special focus in this conference is on Evaluation and Performance. The topics include: On-line performance monitoring using OMIS;performance analysis of task-based algorithms on heterogeneous systems with message passing;automatic detection of PVM program performance problems;evaluating and modeling communication overhead of MPI primitives on the meiko CS-2;a parallel I/O test suite;improving the PVM daemon network performance by direct network access;a detailed, accurate MPI benchmark;the current status and performance of the available environments;the next generation beyond PVM;advances in heterogeneous network computing;MPI connect managing heterogenous MPI applications interopration and process control;an active layer extension to MPI;interconnecting PVM and MPI applications;message passing interface for win32 clusters;a java interface for WMPI;porting CHAOS library to MPI;an experience on mixing MPI communications and threads;developing message-passing applications on MPICH under ensemble;the NAG parallel library and the PINEAPL project;on the implementation of a portable, client-server based MPI-IO interface;distributed computing in a heterogeneous computing environment;rank reordering strategy for MPI topology creation functions;scalable and adaptive resource sharing in PVM;load balancing for network based multi-threaded applications;creation of reconfigurable hardware objects in PVM environments;implementing MPI with the memory-based communication facilities on the SSS-CORE operating system;PVM on windows and NT clusters and java and network parallel processing.

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Fault tolerant cluster computing through replication

Fault tolerant cluster computing through replication

引用

International conference on parallel and distributed Systems (ICPADS)

作者： Kam Hong Shum Department of Information Systems & Computer Science National University of Singapore Singapore

ISBN: (纸本)0818682272

Long-lived parallel applications running on work station clusters are vulnerable to single-node or multiple-node failures. Fault recovery is therefore required to prevent immature program termination. However, much of the runtime overhead imposed by fault tolerance schemes is generally due to the cost of transferring the checkpoint states of applications by disk I/O operations. In this paper, we propose a fault tolerant model in which checkpoint states are transferred between replicated parallel applications. We also describe how the resource consumption of the replicated applications can be minimized. The fault tolerant model has been implemented and tested on a workstation cluster and a Fujitsu AP3000 multi-processor machine. The measurements of our experiments have showed that efficient fault tolerance can be achieved by replicating parallel applications on clusters of computers.

关键词： Fault tolerance Checkpointing Concurrent computing Workstations Application software Discrete event simulation Runtime Writing Information systems Computer science

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An efficient parallel texture classification for image retrieval

An efficient parallel texture classification for image retri...

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proceedings of the advances in parallel and distributed computing

作者： J. You H. Shen H.A. Cohen School of Computing & Information Technology Griffith University Nathan Campus Brisbane QLD Australia Department of Computer Science La Trobe University Australia

This paper proposes an efficient parallel approach to texture classification for image retrieval. The idea behind this method is to pre-extract texture features in terms of texture energy measurement associated with a 'tuned' mask and store them in a multi-scale and multi-orientation texture class database via a two-dimensional linked list for query. Thus each texture class sample in the database can be traced by its texture energy in a two-dimensional row sorted matrix. The parallel searching strategies are introduced for fast identifying the entities closest to the input texture throughout the given texture energy matrix. In contrast to the traditional search methods, our approach incorporates different computation patterns for different cases of available processor numbers and concerns with robust and work-optimal parallel algorithms for row-search and minimum-find based an the accelerated cascading technique and the dynamic processor allocation scheme. Applications of the proposed parallel search and multisearch algorithms to both single image classification and multiple image classification are discussed. The time complexity analysis shows that our proposal will speed up the classification tasks in a simple but dynamic manner. Examples are presented of the texture classification task applied to image retrieval of Brodatz textures, comprising various orientations and scales.

关键词： Image retrieval Image databases Spatial databases Image classification Energy measurement Search methods Concurrent computing Robustness parallel algorithms Acceleration

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International Workshop on Artificial Intelligence and Simulation of Behaviour, AISB 1997

引用

AISB International Workshop on Evolutionary computing, 1997

ISBN: (纸本)3540634762

The proceedings contain 21 papers. The special focus in this conference is on Evolutionary Approaches to Issues in Biology and Economics. The topics include: Simulating pricing behaviours using a genetic algorithm;biologically inspired computational ecologies;modelling bounded rationality using evolutionary techniques;the abstract theory of evolution of the living;an evolutionary algorithm for single objective nonlinear constrained optimization problems;on recombinative sampling;the evolution of mutation, plasticity and culture in cyclically changing environments;on the structure and transformation of landscapes;island model genetic algorithms and linearly separable problems;empirical validation of the performance of a class of transient detector;the construction and evaluation of decision trees;parallel distributed genetic programming applied to the evolution of natural language recognisers;scheduling planned maintenance of the south wales region of the national grid;solving generic scheduling problems with a distributed genetic algorithm;directing the search of evolutionary and neighbourhood-search optimisers for the flowshop sequencing problem with an idle-time heuristic;multiobjective genetic algorithms for pump scheduling in water supply;use of rules and preferences for schedule builders in genetic algorithms for production scheduling;a voxel based approach to evolutionary shape optimisation;an evolutionary, agent-assisted strategy for conceptual design space decomposition and task scheduling with use of classifier systems.

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Crash-proof systemic computing: a demonstration of native fault-tolerance and self-maintenance

Crash-proof systemic computing: a demonstration of native fa...

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4th IASTED International conference on advances in Computer Science and Technology, ACST 2008

作者： Martelot, Erwan Le Bentley, Peter J. Lotto, R. Beau Engineering Department University College London Torrington Place London WC1E 7JE United Kingdom Computer Science Department University College London Malet Place London WC1E 6BT United Kingdom Institute of Ophthalmology University College London 11-43 Bath Street London EC1V 9EL United Kingdom

ISBN: (纸本)9780889867307

Reliability in computer or engineering systems is undoubtedly a key requirement in the development process. Safety within critical control systems, and reliable data transfers, require tolerance to unexpected and unwanted phenomena. In biology, new cells can replace damaged cells [1], DNA is able to repair and replicate with error control [1]. These processes are essential to maintain the overall organism. Biology has often been a successful inspiration in computation (artificial neural networks, genetic algorithms, ant colony optimisation, etc) although conventional computation differs widely from natural computation. In this respect, [2] introduced systemic computation (SC), a model of interacting systems with natural characteristics and suggested a new computer architecture. Following this work, [3] introduced a systemic computer as a virtual machine running on conventional computers. In this paper we show, using a genetic algorithm implementation running on this platform, how crash-proof programs following the SC paradigm have native fault-tolerance and easily integrated self-maintenance.

关键词： Fault tolerance

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Solution of path problems using associative parallel processors

Solution of path problems using associative parallel process...

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International conference on parallel and distributed Systems (ICPADS)

作者： A.S. Nepomniaschaya Supercomputer Software Department Computing Center Siberian Division Russian Academy of Science Novosibirsk Russia

In this paper we study a question of representing a group of associative algorithms on an abstract model of the SIMD type with vertical data processing (the STAR-machine). This group includes the Warshall transitive closure algorithm, the Floyd shortest path algorithm and the Maggs-Plotkin minimal spanning tree algorithm. These algorithms are represented as the corresponding STAR procedures whose correctness is verified and time complexity is evaluated.

关键词： Supercomputers Dynamic programming Gaussian processes Data processing Automata Equations Performance analysis Arithmetic Associative memory Digital audio players

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I/O and memory-efficient matrix multiplication with user-controllable parallel I/O

I/O and memory-efficient matrix multiplication with user-con...

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International conference on parallel and distributed Systems (ICPADS)

作者： Jang Sun Lee Sung-Yong Park P. Bruce Berra S. Ranka A.I. Section Electronics and Telecommunications Research Institute Daejeon South Korea Department of EECS Syracuse University Syracuse NY USA Department of CIS University of Florida Gainesville FL USA

The UPIO (user-controllable parallel I/O) proposed by the authors in 1996 allows users to determine a file's structure by considering the access patterns of particular applications and the distribution of data for parallel access, and them do I/O collectively. This enables users to produce high-performance external computation codes by planning I/O, computations, communication, and the reuse of data effectively in the codes. They show how well UPIO produces high performance external computation codes by designing I/O and memory-efficient external matrix multiplication algorithms and exploring the effects of UPIO with the codes.

关键词： Programming profession File systems distributed computing Shape control Concurrent computing Control system synthesis Degradation Computer languages

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advances in Computer Science and Information Technology 1

引用

丛书名： Communications in Computer and Information Science

1000年

作者： Natarajan Meghanathan Brajesh Kumar Kaushik Dhinaharan Nagamalai

ISBN: (数字)9783642178573

ISBN: (纸本)9783642178566

This volume constitutes the first of three parts of the refereed proceedings of the First International conference on Computer Science and Information Technology, CCSIT 2010, held in Bangalore, India, in January 2011. The 59 revised full papers presented in this volume were carefully reviewed and selected. The papers are organized in topical sections on distributed and parallel systems and algorithms; DSP, image processing, pattern recognition, and multimedia; software engineering; database and data Mining; as well as soft computing, such as AI, neural networks, fuzzy systems, etc.

关键词： Computer Communication Networks Artificial Intelligence Information Systems Applications (incl. Internet) Algorithm Analysis and Problem Complexity Software Engineering Information Storage and Retrieval

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A distribution format for communication-free reshape in distributed memory computers

A distribution format for communication-free reshape in dist...

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International conference on parallel and distributed Systems (ICPADS)

作者： Hyun-Gyoo Yook Mi-Soon Koo Muong-Soon Park Tae-Geun Kim Department of Computer Science Korea University Seoul South Korea Systems Engineering Research Institute Taejon South Korea

ISBN: (纸本)0818682272

Data parallel languages designed for distributed memory computing environments provide a single global address space to the programmer. The mapping from this global address space to the distributed local address space is performed by a compiler, which does this mapping based on the array distribution format. Thus, each array in a data parallel language program has its own distribution format. The Reshape function changes the array distribution format as well as the array shape. However, the changed distribution format cannot be represented by any distribution format supported in current languages. Because there is no suitable distribution format, it is necessary to change the reshaped distribution format to an existing distribution format, with heavy overhead due to the redistribution function. To eliminate the redistribution step in Reshape function, we have proposed a new distribution format, HIER-CYCLIC, which can represent the reshaped distribution format. We have also proposed a language syntax to use HIER-CYCLIC and a compiling mechanism. Finally, we performed an experiment on an IBM-SP2 machine using a shift function.

关键词： distributed computing parallel languages Programming profession Concurrent computing Shape Computer science Marine vehicles Contracts Data engineering Systems engineering and theory

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