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Workshop on Heterogeneous processing

作者： D.W. Watson H.J. Siegel J.K. Antonio M.A. Nichols M.J. Atallah Parallel Processing Laboratory School of Electrical Engineering Purdue University West Lafayette IN USA NCR Corporation San Diego CA USA Computer Sciences Department Purdue University West Lafayette IN USA

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TLM MODELING USING AN SIMD computer

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INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1993年第4期6卷 299-304页

作者： TAN, CC FUSCO, VF The Queen's University of Belfast Department of Electrical & Electronic Engineering Ashby Building Stranmillis Road Belfast BT9 5AH U.K. Chun Chia Tan obtained a first-class honours degree from The Queen's University of Belfast. He was awarded an IEE prize for best final-year project. His current research interests include the modelling of electromagnetic fields using parallel processing techniques. At present Mr Tan is working as an electrical engineer in Malaysia. Vincent F. Fusco was educated at The Queen's University of Belfast where he obtained the degree of Ph.D. He has worked as a research engineer on short-range radar and radio telementry systems. Currently he is a Reader in Microwave Commnications in the School of Electrical Engineering and Computer Science The Queen's Univeristy of Belfast. His current research interests include non-linear microwave circuit simulation and concurrent programming techniques for electromagnetic field problems. He has acted as consultant to a number of major companies and has published numerous research papers in these areas. He is author of the bookMicrowave Circuits Analysis and Computer Aided Design(Prentice Hall 1987). Dr Fusco is a Chartered Electrical Engineer and a Member of the Institute of Electrical Engineers.

A major limitation of the transmission-line matrix (TLM) method used to solve Maxwell's equations is the long computation time required. The TLM scattering calculations involved can, however, be viewed as parallel in nature. This paper describes an effort to reduce computational time by using an SIMD, DAP multiprocessor computer employed to solve a two-dimensional TLM electromagnetic field formulation. A parallel algorithm based on the TLM scattering algorithm is designed and implemented using FORTRAN-PLUS Enhanced on an AMT DAP 510 machine. Here the connectivity of the DAP is exploited to simulate the intrinsic scattering behaviour on which the TLM algorithm relies. The results show that parallel processing on an SIMD machine such as the DAP is advantageous, especially for higher-order mesh sizes.

关键词： Electric lines

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SPECIFICATION AND ANALYSIS OF parallel DISTRIBUTED SOFTWARE AND SYSTEMS BY PETRI NETS WITH TRANSITION ENABLING FUNCTIONS

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IEEE TRANSACTIONS ON SOFTWARE engineering 1992年第3期18卷 252-261页

作者： PAPELIS, YE CASAVANT, TL Parallel Processing Laboratory Department of Electrical and Computer Engineering University of Iowa Iowa City IA 52242

This paper investigates a new approach for visually specifying parallel/distributed software using Petri Nets (PN's) extended with Transition Enabling Functions (TEF's). The approach is demonstrated to be useful in the specification of decision-making activities that control distributed computing systems. PN's are employed because of their highly visual nature that can give insight into the nature of the controller of such a system and because of their well-known analytical properties. In order to increase the expressive power of PN's, the extension of TEF's is used. The main focus of this paper is the specification and analysis of parallel/distributed software and systems. A key element of this approach is a set of rules derived to automatically transform such an extended net into a basic PN. Once the rules have been applied to transform the specification, well-known analytical methods can be used to investigate characteristic properties of the system and validate correct operation.

关键词： DISTRIBUTED SOFTWARE parallel SOFTWARE SOFTWARE SPECIFICATION parallel PETRI NETS TRANSITION ENABLING FUNCTIONS CONCURRENCY

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A software engineering, visualization methodology for parallel processing systems 16

A software engineering, visualization methodology for parall...

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16th Annual International computer Software and Applications Conference, COMPSAC 1992

作者： Kohl, James Arthur Casavant, Thomas L. Parallel Processing Laboratory Department of Electrical and Computer Engineering University of Iowa Iowa CityIA52242 United States

ISBN: (纸本)0818630000

This paper focuses on techniques for enhancing the feasibility of using graphic visualization in analyzing the complexities of parallel software. The central drawback to applying such visual techniques is the overhead in developing analysis tools with flexible, customized views. The PARADISE (parallel Animated Debugging and Simulation Environment) system, which has been in operation since 1989, alleviates some of this design overhead by providing an abstract, object-oriented, visual modeling environment which expedites custom visual tool development. PARADISE is a visual tool which is used to develop other visual tools, or a meta-tool. This paper complements previous work on PARADISE by describing the philosophy behind its design, and how that philosophy leads to a methodology for constructing visual models which characterize parallel systems in general. Emphasis will be on the crucial issues in utilizing visualization for parallel software development, and how PARADISE deals with these issues. © 1992 IEEE.

关键词： parallel processing systems

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The seamless approach to reconciling communication and locality in distributed memory parallel systems

The seamless approach to reconciling communication and local...

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International Symposium on parallel processing

作者： S.A. Fineberg T.L. Casavant B.H. Pease Parallel PrFessin Laboratory Department of Electrical and Computer Engineering University of Iowa Iowa IA USA Parallel Processing Laboratory Department of Electrical and Computer Engineering University of Iowa Iowa IA USA

With recent improvements in single CPU performance, several issues become more important in multiprocessor design. Two of these are interprocessor communication and locality. In parallel systems with fast CPUs, locality is vital to performance. However, traditional parallel programming models such as shared memory or message passing do not naturally lead to programs that exhibit locality. In the paper, the Seamless model for interprocessor communication is presented which is based on locality and that allows the programmer to explicitly manipulate a program's locality to optimize performance. Additionally, this model can support latency tolerance with proper hardware support. Extensions to the C programming language that support this model are also presented. Finally, a parallel program utilizing this model is provided to illustrate the paradigm.< >

关键词： Delay Central processing Unit Programming profession Memory management Message passing Concurrent computing Reduced instruction set computing Cache memory Cities and towns parallel programming

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Hardware support for the Seamless programming model

Hardware support for the Seamless programming model

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Frontiers of Massively parallel Computation

作者： S.A. Fineberg T.L. Casavant B.H. Pease Computer Science Corporation USA Parallel Processing Laboratory Department of Electrical and Computer Engineering University of Iowa Iowa IA USA

The communication latency problem is presented with special emphasis on RISC (reduced instruction set computer) based multiprocessors. An interprocessor communication model for parallel programs based on locality is presented. This model enables the programmer to manipulate locality at the language level and to take advantage of currently available system hardware to reduce latency. A hardware node architecture for a latency-tolerant RISC-based multiprocessor, called Seamless, that supports this model, is presented. The Seamless architecture includes the addition of a hardware locality manager to each processing element, as well as an integral runtime environment and compiler.< >

关键词： Hardware Delay Yarn parallel processing Reduced instruction set computing Costs Coprocessors Communication system control parallel architectures Synchronization

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A software engineering, visualization methodology for parallel processing systems

A software engineering, visualization methodology for parall...

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IEEE Annual International computer Software and Applications Conference (COMPSAC)

作者： J.A. Kohl T.L. Casavant Parallel Processing Laboratory Department of Electrical and Computer Engineering University of Iowa Iowa IA USA Iowa Univ. Iowa City IA USA

The authors focus on techniques for enhancing the feasibility of using graphic visualization in analyzing the complexities of parallel software. The central drawback to applying such visual techniques is the overhead in developing analysis tools with flexible, customized views. The PARADISE system alleviates some of this design overhead by providing an abstract, object-oriented, visual modeling environment which expedites custom visual tool development. PARADISE is a visual tool which is used to develop other visual tools, or a meta-tool. The authors complement previous work on PARADISE by describing the philosophy behind its design, and how that philosophy leads to a methodology for constructing visual models which characterize parallel systems in general. The emphasis is on the crucial issues in utilizing visualization for parallel software development, and on how PARADISE deals with these issues.< >

关键词： Software engineering Visualization parallel processing Animation Object oriented modeling Power system modeling Debugging Programming Laboratories Cities and towns

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Use of PARADISE: A meta-tool for visualizing parallel systems 5

Use of PARADISE: A meta-tool for visualizing parallel system...

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5th International parallel processing Symposium, IPPS 1991

作者： Kohl, James Arthur Casavant, Thomas L. Parallel Processing Laboratory Department of Electrical and Computer Engineering University of Iowa Iowa CityIA52242 United States

ISBN: (纸本)0818691670

This paper addresses the problem of creating software tools for visualizing the dynamic behavior of parallel applications and systems. PARADISE (parallel Animated Debugging and Simulation Environment) approaches this problem by providing a meta-tool environment for generating custom visual analysis tools. PARADISE is a meta-tool because it is a tool which is utilized to create other tools. This paper focuses on the user's view of the use of PARADISE for constructing tools which analyze the interaction between parallel systems and parallel applications. An example of its use, involving the PASM parallel processing System, is given. © 1991 IEEE.

关键词： parallel processing systems

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Design of a system for software testing and debugging for multiprocessor avionics systems 15

Design of a system for software testing and debugging for mu...

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15th Annual International computer Software and Applications Conference, CMPSAC 1991

作者： Lumpp, James E. Shultz, Roger K. Casavant, Thomas L. Parallel Processing Laboratory Department of Electrical and Computer Engineering University of Iowa Iowa CityIA52242 United States Advanced Technology and Engineering Collins Commercial Avionics Rockwell International Corporation Cedar RapidsIA52498 United States

ISBN: (纸本)0818621524

The debugging and testing of commercial software constitutes a substantial portion of the development time and, by most estimates, over fifty percent of the overall cost of software development. For critical applications, such as avionics, complete testing is extremely important. However, as multiprocessor software solutions find their way into these critical applications as a means of increasing performance and reliability, the need for both debugging and testing tools increases dramatically. This paper focuses on the gathering of accurate run-time information providing support for both debugging and testing of embedded multi-processor systems by employing runtime identification of "simple events" and post-execution identification of "compound events." Additionally, we propose a novel way of combining specification based (black-box) system testing and automatic monitoring to substantially reduce the complexity, tedium, and cost of complete structural (white-box) testing. © 1991 IEEE.

关键词： Program debugging

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Use of PARADISE: a meta-tool for visualizing parallel systems

Use of PARADISE: a meta-tool for visualizing parallel system...

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International Symposium on parallel processing

作者： J.A. Kohl T.L. Casavant Parallel Processing Laboratory Department of Electrical and Computer Engineering University of Iowa Iowa IA USA

Addresses the problem of creating software tools for visualizing the dynamic behavior of parallel applications and systems. PARADISE (parallel Animated Debugging and Simulation Environment) approaches this problem by providing a meta-tool environment for generating custom visual analysis tools. PARADISE is a meta-tool because it is a tool which is utilized to create other tools. The authors focus on the user's view of the use of PARADISE for constructing tools which analyze the interaction between parallel systems and parallel applications. An example of its use, involving the PASM parallel processing System, is given.< >

关键词： Visualization Algorithm design and analysis Image analysis parallel processing Laboratories Cities and towns Animation Computational modeling Analytical models Concurrent computing

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