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Grid-based parallel and distributed simulation environment

引用

7th international Conference on parallel computing Technologies, PaCT 2003

作者： Kim, Chang-Hoon Lee, Tae-Dong Hwang, Sun-Chul Jeong, Chang-Sung Department of Electronics Engineering Graduate School Korea University 5-ka Anam-dong Sungbuk-ku Seoul Korea Republic of

ISBN: (纸本)3540406735

Although parallel and distributed computing for a large-scale simulation has many advantages in speed and efficiency, it is difficult for parallel and distributed application to achieve its expected performance, because of some obstacles such as deficient computing powers, weakness in fault and security problem. Motivated by these concerns, we present a Grid-based parallel and distributed Simulation environment(GPDS) which not only addresses the problems but also supports transparency and scalability using Grid technologies. GPDS supports a 3-tier architecture which consists of clients at front end, interaction server at the middle, and a network of computing resources at back-end. Grid and simulation agents in the interaction server enables client to transparently perform a large-scale object-oriented simulation by automatically distributing the relevant simulation objects among the computing resources while supporting scalability and fault tolerance by load balancing and dynamic migration schemes. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Scalability

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DOVE-G: Design and implementation of distributed object-oriented virtual environment on grid

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7th international Conference on parallel computing Technologies, PaCT 2003

作者： Woo, Young-Je Jeong, Chang-Sung Department of Electronics and Computer Engineering Korea University Anamdong 5-ga Sungbuk-gu Seoul136-701 Korea Republic of

ISBN: (纸本)3540406735

In this paper, we address the design and implementation of DOVE-G (distributed Object-oriented Virtual computing Environment on Grid). DOVE-G is designed to integrate application and Grid services by encapsulating not only application modules but also Grid services as DOVE-G objects, and hence supports an enriched parallel programming environment on Grid by enabling users to build a parallel program as a collection of concurrent DOVE-G objects. DOVE-G is built as a multilayered runtime system which can support a unified programming view for application and Grid services. Each layer of DOVE-G is implemented in C++ class library, and interacts with one another using the interfaces in the class library to provide system modularity and extensibility. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Virtual reality

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An agent architecture for network support of distributed simulation 7

An agent architecture for network support of distributed sim...

引用

7th IEEE international symposium on distributed Simulation and Real-Time Applications, DS-RT 2003

作者： Simon, R. Chang, Woan Sun Pullen, J.M. Dept. of Computer Science George Mason University FairfaxVA22030 United States Dept. of Computer Science C3I Center George Mason University FairfaxVA22030 United States

ISBN: (纸本)0769520367

Continued research into distributed agent-based systems and evolving Web based technologies are opening up tremendous possibilities for the deployment of large scale and highly extensible and flexible simulation systems. However, the question remains as to how well agent and Web based simulation systems can use underlying network services. this is especially true for complex distributed simulations that have multiple participants and real-time data delivery requirements. this paper addresses the issue of interconnection patterns among Web-based simulation agents. We first describe a simple agent-oriented architectural extension to an existing distributed simulation system. Next, we present a set of interconnection algorithms between the agents in the system, under the assumption that only end-host multicast is available. We experimentally evaluate our approach under a number of different scenarios. Our results show that by using a proper connection strategy it is possible to get performance comparable to network-layer multicast for agent-based systems that use end-host multicast. © 2003 IEEE.

关键词： Web services

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Slipstream execution mode for CMP-based multiprocessors 9

Slipstream execution mode for CMP-based multiprocessors

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9th international symposium on High-Performance Computer Architecture

作者： Ibrahim, KZ Byrd, GT Rotenberg, E N Carolina State Univ Dept Elect & Comp Engn Raleigh NC 27695 USA

ISBN: (纸本)0769518710

Scalability of applications on distributed shared-memory (DSM) multiprocessors is limited by communication overheads. At some point, using more processors to increase parallelism yields diminishing returns or even degrades performance. When increasing concurrency is futile, we propose an additional mode of execution, called slipstream mode, that instead enlists extra processors to assist parallel tasks by reducing perceived overheads. We consider DSM multiprocessors built from dual-processor chip multiprocessor (CMP) nodes with shared L2 cache. A task is allocated on one processor of each CMP node. the other processor of each node executes a reduced version of the same task. the reduced version skips shared-memory stores and synchronization, running ahead of the true task. Even with the skipped operations, the reduced task makes accurate forward progress and generates an accurate reference stream, because branches and addresses depend primarily on private data. Slipstream execution mode yields two benefits. First, the reduced task prefetches data on behalf of the true task. Second, reduced tasks provide a detailed picture of future reference behavior, enabling a number of optimizations aimed at accelerating coherence events, e.g., self-invalidation. For multiprocessor systems with up to 16 CMP nodes, slipstream, mode outperforms running one or two conventional tasks per CMP in 7 out of 9 parallel scientific benchmarks. Slipstream mode is 12-19% faster with prefetching only and up to 29% faster with self-invalidation enabled.

关键词： Acceleration Character generation Coherence Concurrent computing Degradation Multiprocessing systems parallel processing Performance gain Prefetching Scalability

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A parallel distributed environment for Pakistan

A parallel distributed environment for Pakistan

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IEEE international Conference on Multi Topic

作者： M.U. Mirza Asim-ur-Rehman Z.A. Shaikh O.A. Khan National University of Computer and Emerging Sciences Karachi Pakistan

parallel distributed computing systems provide mechanisms for exploiting parallelism inherent in many scientific and engineering applications. One such programming environment that has successfully demonstrated operation on a collection of heterogeneous computing elements incorporated by one or more networks is the parallel virtual machine (PVM). It has been used on high end computing resources such as mainframe computers, multiprocessors, hypercubes, and the like. In Pakistan, the most common computing resource is a low cost PC. the abundance of such machines provides an opportunity to develop and use a "poor man's supercomputer". In addition, research on PVM has focused on Unix or similar platforms. None of the formal results, to evaluate certain benchmark applications, are available on Windows-based environments. the work reports the results of the local PVM implementation and compares them with results from conventional implementations of PVM.

关键词： distributed computing parallel processing Application software Programming environments Computer networks Concurrent computing Virtual machining Hypercubes Costs Supercomputers

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parallelism principles at construction of multilevel distributed computer systems

Parallelism principles at construction of multilevel distrib...

引用

international Conference on CAD Systems in Microelectronics (CADSM)

作者： N. Krutskevych Institute of Computer Information Technologies Temopil Academy of National Economy Ternopil Ukraine

Steep development of computer systems has created a great variety of important technical and scientific problems: for development of an architecture of algorithms, control circuits for access to common resources, and computing structures and distributed database structures. In this paper, the principles of parallelism for the construction of multilevel distributed computer networks are given.

关键词： parallel processing Concurrent computing distributed computing Computer networks Computer architecture Strips Automatic control Control systems Memory management Frequency conversion

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DAxML: A program for distributed computation of phylogenetic trees based on load managed CORBA

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7th international Conference on parallel computing Technologies, PaCT 2003

作者： Stamatakis, Alexandros P. Lindermeier, Markus Ott, Michael Ludwig, thomas Meier, Harald Technical University of Munich Department of Computer Science Boltzmannstr. 3 Garching b. München85748 Germany Ruprecht-Karls University Department of Computer Science Im Neuenheimer Feld 348 Heidelberg69120 Germany

ISBN: (纸本)3540406735

High performance computing in bioinformatics has led to important progress in the field of genome analysis. Due to the huge amount of data and the complexity of the underlying algorithms many problems can only be solved by using supercomputers. In this paper we present DAxML, a program for the distributed computation of evolutionary trees. In contrast to prior approaches DAxML runs on a cluster of workstations instead of an expensive supercomputer. For this purpose we transformed PAxML, a fast parallel phylogeny program incorporating novel algorithmic optimizations, into a distributed application. DAxML uses modern object-oriented middleware instead of message-passing communication in order to reduce the development and maintenance costs. Our goal is to provide DAxML to a broad range of users, in particular those who do not have supercomputers at their disposal. We ensure high performance and scalability by applying a high-level load management service called LMC (LoadManaged CORBA). LMC provides transparent system level load management by integrating the load management functionality directly into the ORB. In this paper we demonstrate the simplicity of integrating LMC into a real-world application and how it enhances the performance and scalability of DAxML. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Common object request broker architecture (CORBA)

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7th international Conference on parallel computing Technologies, PaCT 2003

作者： Bashkin, Vladimir A. Lomazova, Irina A. Yaroslavl State University Yaroslavl150000 Russia Moscow State Social University Moscow107150 Russia

ISBN: (纸本)3540406735

Resources are defined as submultisets of Petri net markings. Two resources are called similar if replacing of one by another doesn’t change the net’s behavior. Two resources are called similar under a certain condition if one of them can be replaced by another without changing an observable behavior provided that a comprehending marking contains also some additional resources. the paper studies conditional similarity of Petri net resources, for which the (unconditional) similarity is a special case. It is proved that the resource similarity is a semilinear relation and can be represented as a finite union of linear combinations over a finite set of base conditional resource similarities. the algorithm for computing a finite approximation for conditional resource similarity relation is also presented. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Petri nets

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distributed object-oriented web-based simulation

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7th international Conference on parallel computing Technologies, PaCT 2003

作者： Lee, Tae-Dong Hwang, Sun-Chul Jeong, Jin-Lip Jeong, Chang-Sung School of Electrical Engneering in Korea University 1-5ka Anam-Dong Sungbuk-Ku Seoul136-701 Korea Republic of

ISBN: (纸本)3540406735

this paper presents the design and implementation of distributed Object-oriented Web-based Simulation (DOWS). DOWS is an object-oriented simulation system based on a new concept, a directoractor model. It also models a distributed simulation as a collection of actor objects running concurrently at different nodes. DOWS is implemented using Java objects which interact with each other through Java RMI. Each director object is implemented as web client which downloads and executes the proper applet from a HTTP server, and hence DOWS provides a web-enabled simulation environment which allows users to easily instantiate the simulation model using the HTTP server. the whole simulation can be speed up by decomposing the simulation model into several submodels and mapping them onto the actors. DOWS also provides an efficient virtual real time simulation environment which integrates the coordination among actors by supporting time synchronization, simulation message transfer, and network fault detection. © Springer-Verlag Berlin Heidelberg 2003.

关键词： HTTP

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A high assurance timing synchronization technology for space on-board distributed computer systems 7

A high assurance timing synchronization technology for space...

引用

7th IEEE international symposium on High Assurance Systems Engineering

作者： Yashiro, H Takahashi, Y Fujiwara, T IHI Aerospace Co. Ltd. Japan

the system requirements of space on-board computer necessary to realize not only high reliability but also low cost are discussed. An architecture and high assurance timing synchronization technology that meet the req... 详细信息

ISBN: (纸本)0769517692

关键词： Application software Computer architecture Control systems Costs distributed computing Fault tolerance Satellite broadcasting Space technology Timing Vehicles

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