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检索条件"任意字段=Proceedings of the 1997 Conference on Advances in Parallel and Distributed Computing"

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parallel processing in real-time control: a state-of-the-art report

Parallel processing in real-time control: a state-of-the-art...

引用

IEEE conference on Control Technology and Applications (CCTA)

作者： Popovic Institute of Automation Technology University of Brethemen Germany

advances in communications technology, particularly in fibre optics, have accelerated the application of parallel programming by enabling the interconnection of a huge number of high-performance processors. Further advances in this field will also enable a low-cost implementation of process and user interface required for plant automation and remote data acquisition. At the same time it will considerably help implementation of highly reliable distributed multicomputer systems. Recently, a number of valuable applications have been reported concerning the parallel real-time computing that helped to control laboratory experiments, moving vehicles, power plants, working robots etc. In the paper, a state-of-the-art survey of the techniques and tools for parallel processing in real-time applications, is given.< >

关键词： parallel processing Real time systems Digital control

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Effective computer technology for data processing

Effective computer technology for data processing

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International conference on parallel and distributed Systems (ICPADS)

作者： O.D. Zhukov N.D. Rishe Moscow State University Moscow Region Russia

In this paper a non-traditional computer technology for data representation and processing is presented. It is developed on the basis of classic number theory and some results of fundamental research of Russian academicians Chebyshev and Vinogradov. A peculiarity of the algebraic constructions discussed is determined by using special polynomial conversions and mixed number systems. Some moments concerning this specific had been described previously. Special methods of representing the polynomials allow to obtain the product of two complex numbers in parallel mode using only two real multiplications instead of four as well as to obtain the product of two polynomials of a degree 'n' using n multiplications instead of n. This technology is based on applying both a polynomial ring mapping (PRM) and an extended Galois Fields techniques which allows large dynamic range computations to be performed using massively parallel small finite ring computations. Such computations can offer distinct advantages over computations using usual binary number system.

关键词： Data processing Polynomials Galois fields Chebyshev approximation Concurrent computing Hardware Zinc Sufficient conditions

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Noncontiguous I/O through PVFS

Noncontiguous I/O through PVFS

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IEEE International conference on Cluster computing

作者： Avery Ching A. Choudhary Wei-keng Liao R. Ross W. Gropp Center for Parallel and Distributed Computing Northwestern University Evanston IL USA Mathematics and Computer Science Division Argonne National Laboratory Argonne IL USA

With the tremendous advances in processor and memory technology, I/O has risen to become the bottleneck in high-performance computing for many applications. The development of parallel file systems has helped to ease the performance gap, but I/O still remains an area needing significant performance improvement. Research has found that noncontiguous I/O access patterns in scientific applications combined with current file system methods, to perform these accesses lead to unacceptable performance for large data sets. To enhance performance of noncontiguous I/O, we have created list I/O, a native version of noncontiguous I/O. We have used the parallel Virtual File System (PVFS) to implement our ideas. Our research and experimentation shows that list I/O outperforms current noncontiguous I/O access methods in most I/O situations and can substantially enhance the performance of real-world scientific applications.

关键词： File systems File servers Concurrent computing Linux distributed computing Application software Costs Network servers Mathematics Computer science

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A unified approach to global concurrency control and global deadlocks in a multidatabase environment

A unified approach to global concurrency control and global ...

引用

International conference on parallel and distributed Systems (ICPADS)

作者： SangKeun Lee Chong-Sun Hwang WonGyu Lee Department of Computer Science and Engineering Korea University Seoul South Korea Department of Computer Science Education Korea University Seoul South Korea

ISBN: (纸本)0818682272

Our objective is to provide a theoretical foundation for multidatabase transaction management that deals with global concurrency control and global deadlocks in a uniform manner. We first propose rigid conflict serializability as a sufficient condition for the global transaction management to ensure global serializability in multidatabase environment. Subsequently, it is shown that the enforcement of rigid conflict serializability through a rigid method at the time each global subtransaction begins its execution avoids global deadlocks. The deadlock-free policy in the paper seems to be attractive due to the simple and uniform approach it takes. The basic advantage of the approach is that the global transaction manager can allow any interleavings among normal database operations belonging to global transactions without any mechanism at global level.

关键词： Concurrency control System recovery Transaction databases Concurrent computing Database systems Computer science education Protocols Milling machines Terminology

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A concurrent program debugging environment using real-time replay

A concurrent program debugging environment using real-time r...

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International conference on parallel and distributed Systems (ICPADS)

作者： E.H. Paik Y.S. Chung B.S. Lee Chae-Woo Yoo SDE Section Electronics and Telecommunications Research Institute Taejon South Korea School of Computing Soongsil University Seoul South Korea

A common debugging strategy involves re-execution of a program (on a given input) over and over, each time gaining more information about bugs. Such techniques can fail in concurrent programs. Because of variations in message latencies and process scheduling, different runs on the given input may produce different results. This non-repeatability rules out the reproduction of errors which is the cornerstone of conventional debugging techniques. So, guaranteeing reproducibility is major issue in the concurrent program debugging. This paper discusses the design and implementation of a concurrent program debugging environment which replays the error-occurred execution and debugs the errors using a recorded event history file and input data.

关键词： Debugging Probes Monitoring Joining processes Programming profession Runtime Computer bugs Delay Reproducibility of results History

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Performance predictor for HPF compilers

Performance predictor for HPF compilers

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International conference on parallel and distributed Systems (ICPADS)

作者： Dong-Soo Han Man-Pyo Hong School of Information and Computer Engineering Information and Communications University Taejon South Korea Department of Information and Computer Engineering Ajou University Suwon South Korea

ISBN: (纸本)0818682272

In HPF programming environment, program behavior needs to be reported for the development of well-tuned application programs. Performance predictor has been regarded as a proper approach for such requirement. In this paper, we propose a performance predictor which includes profiler, static performance predictor and dynamic performance predictor. Profiler generates execution count of each statement by profiling run of the program. While the static performance predictor generates general performance data, dynamic performance predictor reports some advanced performance data such as computation/communication overlapping and performance degradation by cache mis hit. Program slicing technique is applied to profiler and skeleton program is extracted from source program in dynamic performance predictor to speed up prediction time.

关键词： Programming profession Application software Dynamic programming Concurrent computing Instruments Programming environments Degradation Skeleton Computer languages Writing

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ICA3PP 2012 Panel on Future and Challenges of parallel and distributed computing

ICA3PP 2012 Panel on Future and Challenges of Parallel and D...

引用

Symposia and Workshops on Ubiquitous, Autonomic and Trusted computing, UIC-ATC

Summary form only given, as follows. Today, both parallel and distributing computing have became ubiquitous in the forms of clouds and cyber physical systems. We have witnessed the fast developing technology fundamentally changing the balances and paradigms between cost of computing, communication and programming: At the hardware level, the essential aspect of quickly changing landscape is the difference in growth of network bandwidth, processor speed and memory access times. High speed networks are changing balance on the networking side, because port throughput is more limited by the processor speed than by the network bandwidth, as it was in the past. At the same time, the latency of the networks is fundamentally limited by the speed of light and the distance that the transferred data need to travel. On the other hand, the speed of a processor is growing faster than the access time to the memory (where the technological advances are used to increase the memory chip capacity rather than its speed). The resulting use of buffering to mask the speed differences has led to the multi-memory hierarchy in which registers, primary cache, secondary cache and main memory are typical layers with progressively lower speed but larger capacity. This panel will discuss the exciting and promising future of parallel and distributed computing. A record of the panel discussion was not made available for publication as part of the conference proceedings.

关键词： distributed computing Hardware Software Security Bandwidth

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Performance evaluation of high performance switches on parallel and distributed computers

Performance evaluation of high performance switches on paral...

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International conference on High Performance computing in the Asia-Pacific Region

作者： E. Dirkx W. Brissinck A. Touhafi S. Clarysse Department INFO Vrije Universiteit Brussel Brussels Belgium

The performance of switching fabrics is crucial to the global quality of service offered by an interconnection networks. It is shown that highly detailed simulations can be accelerated by using a parallel (high performance) computer as the computational platform. The simulation model is represented totally independently of the specific computer: hence validation has to be performed only once and the acceleration and optimization of a given implementation are strictly orthogonal to the problem description.

关键词： Switches Concurrent computing distributed computing High performance computing Telecommunication traffic Traffic control Analytical models Computational modeling Computer simulation Bandwidth

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Sufficient conditions for optimal multicast communication

Sufficient conditions for optimal multicast communication

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International conference on parallel Processing (ICPP)

作者： B.D. Birchler A.-H. Esfahanian E. Torng Department of Computer Science Michigan State University East Lansing MI USA

In this paper, we give a general technique for computing optimal multicast calling schedules in any multiprocessor system that utilizes a direct network interconnection structure as long as a few simple conditions are satisfied. Since almost any real system will satisfy these conditions, this result essentially means that multicast can always be performed in [log(d+1)] phases where d is the number of multicast destinations. In particular, previous results on optimal multicast algorithms in specific direct network topologies are simply corollaries of our result.

关键词： Sufficient conditions Multicast communication Routing Network topology Hardware distributed computing Multicast algorithms Unicast Scheduling Computer science

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HOLMES: a tool for monitoring heterogeneous architectures

HOLMES: a tool for monitoring heterogeneous architectures

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International conference on High Performance computing

作者： A. Corradi C. Stefanelli Dipartimento di Elettronica Informatica e Sistemistica Università di Bologna Bologna Italy

Monitoring tools are necessary components in the support of distributed applications and can be used to provide dependability, debugging and testing, to enhance the performance and to make possible the run-time steering of applications. These tools are needed to exploit in the best way all the available high performance computing resources of a heterogeneous environment. The paper describes HOLMES, an on-line monitoring system designed to support dynamic management of resources that requires run-time measurement. HOLMES identifies the evolving system state and provides the necessary information to any dynamic policy to assign resources by following application evolution. HOLMES makes possible to control and steer an application even distributed across heterogeneous architectures, from parallel machines to clusters of workstations and PCs.

关键词： Monitoring Runtime Computer architecture Debugging Testing High performance computing Resource management parallel machines Workstations Personal communication networks

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