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检索条件"任意字段=Proceedings of the twelfth workshop on Parallel and distributed simulation"

共 1176 条记录，以下是211-220 订阅

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Seven-O'Clock: A new distributed GVT algorithm using network atomic operations 05

Seven-O'Clock: A new distributed GVT algorithm using network...

引用

19th workshop on Principles of Advanced and distributed simulation (PADS 2005)

作者： Bauer, D Yaun, G Carothers, CD Yuksel, M Kalyanaraman, S Rensselaer Polytech Inst Dept Comp Sci Troy NY 12180 USA

ISBN: (纸本)0769523838

In this paper we introduce a new concept, network atomic operations (NAOs) to create a zero-cost consistent cut. Using NAOs, we define a wall-clock-time driven GVT algorithm called Seven O' Clock that is an extension of Fujimoto's shared memory GVT algorithm. Using this new GVT algorithm, we report good optimistic parallel performance on a cluster of state-of-the-art Itanium-II quad processor systems for both benchmark applications such as PHOLD and real-world applications such as a large-scale TCP/Internet model. In some cases, super-linear speedup is observed.

关键词： Processor scheduling Clustering algorithms Memory management Discrete event simulation Computer science Large-scale systems Internet Heart Scheduling algorithm Concurrent computing

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XTW, a parallel and distributed logic simulator

XTW, a parallel and distributed logic simulator

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19th workshop on Principles of Advanced and distributed simulation (PADS 2005)

作者： Xu, Q Tropper, C McGill Univ Sch Comp Sci Montreal PQ H3A 2A7 Canada

ISBN: (纸本)0769523838

In this paper, a new event scheduling mechanism XEQ and a new rollback procedure rb-messages are proposed for use in optimistic logic simulation. We incorporate both of these techniques in a simulator XTW. XTW groups LPs into clusters, and makes use of a multi-level queue,XEQ, to schedule events in the cluster. XEQ has an O(1) event scheduling time complexity. Our new rollback mechanism replaces the use of anti-messages by an rb-message, and eliminates the need for an output queue at each LP. Experimental comparisons to Time Warp reveal a superior performance on the part of XTW, while experimental results over large circuits (5-million-gate to 25-million-gate) shows XTW scales well with both the size of circuits and the number of processors.

关键词： Computer simulation

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Optimistic parallel discrete event simulations of physical systems using reverse computation

Optimistic parallel discrete event simulations of physical s...

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workshop on Principles of Advanced and distributed simulation, PADS 2005

作者： Tang, Yarong Perumalla, Kalyan S. Fujimoto, Richard M. Karimabadi, Homa Driscoll, Jonathan Omelchenko, Yuri College of Computing Georgia Institute of Technology Atlanta GA 30332-0280 SciberNet Inc. Solana Beach CA 92075

Efficient computer simulation of complex physical phenomena has long been challenging due to their multi-physics and multi-scale nature. In contrast to traditional time-stepped execution methods, we describe an approach using optimistic parallel discrete event simulation (PDES) and reverse computation techniques. We show that reverse computation-based optimistic parallel execution can significantly reduce the execution time of a plasma simulation without requiring a significant amount of additional memory compared to conservative execution techniques. We describe an application-level reverse computation technique that is efficient and suitable for complex scientific simulations involving floating point operations. © 2005 IEEE.

关键词： parallel processing systems

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Optimistic protocol analysis in a performance analyser and prediction tool

Optimistic protocol analysis in a performance analyser and p...

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workshop on Principles of Advanced and distributed simulation, PADS 2005

作者： Teo, Peihan Turner, Stephen John Juhasz, Zoltan School of Computer Engineering Nanyang Technological University Singapore Singapore Department of Information Systems University of Veszprem Hungary Department of Computer Science University of Exeter United Kingdom

parallelising sequential discrete event simulation programs is often a tedious process, with no guarantee for speedup. This paper describes a performance analyser tool developed to predict the execution performance of parallel discrete event simulation programs, using either optimistic or conservative protocols. The tool aims to provide the user with the flexibility of choosing the simulation protocol desired, and to make useful comparisons between the results obtained. The novel feature of the analyser is that it predicts the parallel execution performance based on a sequential simulation run, without the parallel implementation developed. This paper describes the structure and operation of the analyser program focusing on the analysis of the optimistic simulation protocol. As the prediction of the optimistic protocol is very different from the conservative one, its uniqueness will be illustrated in this paper. The performance analyzer and prediction tool can be used to explore different protocols and parameters in order to provide faster decision making about the final implementation strategy. © 2005 IEEE.

关键词： parallel processing systems

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The WarpIV simulation Kernel 05

The WarpIV Simulation Kernel

引用

workshop on Principles of Advanced and distributed simulation, PADS 2005

作者： Steinman, Jeffrey S. RAM Laboratories Inc. 10525 Vista Sorrento Parkway San Diego CA 92121

ISBN: (纸本)9780769523835

This paper provides an overview of the WarpIV simulation Kernel that was designed to be an initial implementation of the Standard simulation Architecture (SSA). WarpIV is the next generation replacement for the Synchronous parallel Environment for Emulation and Discrete Event simulation (SPEEDES) framework that has supported a number of DoD simulation programs including MDWAR, EADTB, JSIMS, and others. This paper first provides a look back at the historical evolution of SPEEDES, the evolution of the SSA, and the development of WarpIV. This historical background is followed by a description of the layered SSA and design of WarpIV. Capabilities and new algorithms or data structures provided by each layer of the architecture are mentioned, but are not described in full detail. Several benchmarks for the underlying communications infrastructure and internal event-processing engine are given. The summary and conclusions section highlights the main technical points of the paper and describes future research and development goals for WarpIV. © 2005 IEEE.

关键词： Computer architecture

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Evolutionary performance-oriented development of parallel programs by composition of components

Evolutionary performance-oriented development of parallel pr...

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5th International workshop on Software and Performance, WOSP'05

作者： Mahmood, Nasim Feng, Yusheng Browne, James C. Department of Computer Sciences University of Texas at Austin Austin TX 78712 United States Institute for Computational Engineering and Sciences University of Texas at Austin Austin TX 78712 United States

ISBN: (纸本)1595930876

This paper describes a method for evolutionary component-based development of families of parallel programs to attain performance goals on multiple execution environments for multiple family instances and an implementation of the method. It is based upon combining component-oriented development with integration of parallel/distributed execution and parallel/distributed simulation. Each component may have multiple representations at multiple levels of realization from analytical timing models to production code. Each component is encapsulated with an associative interface specifying its properties and behaviors which enables distinguishing among different implementations (or abstractions) of the same functional behavior which may have different performance behavior. Evolutionary development evolves a program from an abstract performance model to a complete program and may continue evolution during runtime. Performance can be estimated at any stage of realization. The implementation is a compiler which composes parallel/distributed programs from components encapsulated with associative interfaces and a runtime system which supports integrated execution/simulation of parallel programs composed from components at different levels of abstraction and program evolution at runtime by component replacement. Case studies in the application of the evolutionary development method including performance results are given. Copyright 2005 ACM.

关键词： Computer programming

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Efficient simulation of wireless networks using LAzy MAC state uPdate

Efficient simulation of wireless networks using LAzy MAC sta...

引用

workshop on Principles of Advanced and distributed simulation, PADS 2005

作者： Lee, Young J. Riley, George F. School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332

Scalable and efficient network simulation methods are the method of choice for evaluating and verifying wireless network protocols on a moderate to large scale. This need becomes obvious when simulating very large-scale wireless networks such as emerging ad hoc sensor networks in which the number of nodes can be the order of thousands or more, and with very high node density. Unfortunately, simulation of such large-scale wireless networks often requires excessively large amounts of computing resources and can be slow to complete. One approach to achieving higher performance in a large-scale network simulation is the use of parallel or distributed simulation techniques. However, the efficient distributed simulation of wireless ad hoc networks is still a daunting task. Therefore, we turn our attention to more traditional sequential simulation methods, and seek to reduce the overhead incurred in the Medium Access Control (MAC) state update propagation between wireless nodes. We introduce a novel method called LAMP (LAzy MAC state uPdate), that substantially reduces this overhead, with no loss of accuracy. Using our wireless network simulation tool, we compare the efficiency of the LAMP approach to the more traditional approach, and show a performance improvement of up to a factor of eight, with no loss of accuracy. © 2005 IEEE.

关键词： Wireless telecommunication systems

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An efficient distributed broadcasting algorithm for ad hoc networks

引用

6th International workshop on Advanced parallel Processing Technologies

作者： Sun, Q Li, LY Wuhan Univ Technol Sch Comp Sci Wuhan 430063 Hubei Peoples R China

ISBN: (纸本)3540296395

In this paper, an efficient distributed heuristic-based algorithm is presented, which is based on joint distance-counter threshold scheme. It features a distributed manner by each node in the network needing no global information. Each node in an ad hoc network receives the message from its neighbors and decides whether to operate retransmitting or not according to the signal strength and times of the receiving messages. The algorithm has superiority such as reliability, rebroadcast saving, less communication overhead for broadcasting task, localized and parameter-less behaviors, so it is easy to operate and possesses a good performance in mobile ad hoc communication environments. A comparison with several other existing algorithms is conducted. It shows by simulation results that the new algorithm is more efficient than others.

关键词： Network protocols

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proceedings 2005 workshop on Techniques, Methodologies and Tools for Performance Evaluation of Complex Systems: FIRB-Perf 2005

Proceedings 2005 Workshop on Techniques, Methodologies and T...

引用

2005 workshop on Techniques, Methodologies and Tools for Performance Evaluation of Complex Systems, FIRB-Perf 2005

ISBN: (纸本)0769524478

The proceedings contain 14 papers. The topics discussed include: performance issues in video streaming environments;design and testing of scalable web-based systems with performance constraints;models of dynamic web content;performance modeling of P2P file sharing applications;performance model building of pervasive computing;design and performance evaluation of mechanisms for mobile-devices handoff forecast;efficient analysis algorithms for parametric fault trees;a tool set for modeling and simulation of robotic workcells;software performance analysis in UML models;scalable and efficient parallel and distributed simulation of complex, dynamic and mobile systems;and towards transparent optimistic synchronization in HLA.

关键词： Large scale systems

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Efficient simulation of wireless networks using lazy MAC state update 05

Efficient simulation of wireless networks using lazy MAC sta...

引用

workshop on Principles of Advanced and distributed simulation (PADS 2005)

作者： Lee, YJ Riley, GF Georgia Inst Technol Sch Elect & Comp Engn Atlanta GA 30332 USA

ISBN: (纸本)0769523838

Scalable and efficient network simulation methods are the method of choice for evaluating and verifying wireless network protocols on a moderate to large scale. This need becomes obvious when simulating very large-scale wireless networks such as emerging ad hoc sensor networks in which the number of nodes can be the order of thousands or more, and with very high node density. Unfortunately, simulation of such large-scale wireless networks often requires excessively large amounts of computing resources and can be slow to complete. One approach to achieving higher performance in a large-scale network simulation is the use of parallel or distributed simulation techniques. However the efficient distributed simulation of wireless ad hoc networks is still a daunting task. Therefore, we turn our attention to more traditional sequential simulation methods, and seek to reduce the overhead incurred in the Medium Access Control (MAC) state update propagation between wireless nodes. We introduce a novel method called LAMP (LAzy MAC state uPdate), that substantially reduces this overhead, with no loss of accuracy. Using our wireless network simulation tool, we compare the efficiency of the LAMP approach to the more traditional approach, and show a performance improvement of up to a factor of eight, with no loss of accuracy.

关键词： Wireless networks Computational modeling Large-scale systems Wireless sensor networks Lamps Wireless application protocol Computer networks Mobile ad hoc networks Media Access Protocol Performance loss

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