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检索条件"任意字段=International Workshop on High-Level Parallel Programming Models and Supportive Environments"

共 126 条记录，以下是31-40 订阅

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Proceedings Eighth international workshop on high-level parallel programming Modes and supportive environments. Held in conjunction with 17th international parallel and Distributed Processing Symposium (IPDPS)

Proceedings Eighth International Workshop on High-Level Para...

引用

international workshop on high-level parallel programming models and supportive environments

The following topics are dealt with: parallel programming models; grid computing; MPI and OpenMP; and performance engineering.

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Toward efficient compilation of user-defined extensible Fortran directives

Toward efficient compilation of user-defined extensible Fort...

引用

9th international workshop on high-level parallel programming models and supportive environments

作者： Rosing, M Nieplocha, J Yabusaki, S Pacific NW Natl Lab Richland WA USA

ISBN: (纸本)0769521517

This paper describes an approach for automatically generating optimized parallel code from serial Fortran programs annotated with high level directives. A preprocessor analyzes both the program and the directives and generates efficient parallel Fortran code that runs on a number of parallel architectures, such as clusters or SMPs. The unique aspect of this approach is that the directives and optimizations can be customized and extended by the expert programmers who would be using them in their applications. This approach enables the creation of parallel extensions to Fortran that are specific to individual applications or science domains.

关键词： parallel processing systems

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DCA: A distributed CCA framework based on MPI

DCA: A distributed CCA framework based on MPI

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9th international workshop on high-level parallel programming models and supportive environments

作者： Bertrand, F Bramley, R Indiana Univ Bloomington IN 47405 USA

ISBN: (纸本)0769521517

The CCA is a component architecture for high-performance scientific applications. In this architecture components are parallel entities that are connected directly or in a distributed manner. The problem of communication between scientific parallel programs with differing numbers of processes is called the "MxN problem". This paper discusses problems and solutions regarding the MxN problem in the context of the CCA. We also present a prototype implementation of a distributed CCA framework with MxN capabilities. This implementation reuses many MPI concepts and constructions to build the parallel-remote port invocation mechanism. Leveraging MPI helps developers that are familiar with that communication library and benefits from its performance and high degree of scalability.

关键词： parallel processing systems

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The MultiLoop programming construct

The <i>MultiLoop</i> programming construct

引用

9th international workshop on high-level parallel programming models and supportive environments

作者： Kalantery, N Univ Westminster Cavendish Sch Comp Sci London W1M 8JS England

ISBN: (纸本)0769521517

This paper introduces a new, high-level parallel programming construct called MultiLoop that is designed to extend existing imperative languages such as C and Java. A MultiLoop statement translates to SPMD specification of a named group of synchronous-iterative processes. For efficient iterative communication, MultiLoop provides a new publish/subscribe model of shared variable access. Under this model the sequential consistency of shared memory is maintained by a new, simple and efficient adaptation of virtual time paradigm. Virtual time is a localised message tagging and queuing procedure that provides a highly efficient alternative to barrier calls. ML-C, a prototype implementation based on C has been developed. We describe the programming model, discuss its implementation and present some empirical data showing good performance obtained for an example of the target class of applications.

关键词： Computer programming languages

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Modeling master-worker applications in POETRIES

Modeling master-worker applications in POETRIES

引用

9th international workshop on high-level parallel programming models and supportive environments

作者： Cesar, E Mesa, JG Sorribes, J Luque, E Univ Autonoma Barcelona Dept Comp Sci Bellaterra 08193 Spain

ISBN: (纸本)0769521517

parallel/Distributed application development is a very difficult task for non-expert programmers, and therefore support tools are needed for all phases of this kind Of application development cycle. This means that developing applications using predefined programming structures (frameworks) should be easier than doing it from scratch. We propose to take advantage of the knowledge about the structure of the application in order to develop a dynamic and automatic tuning tool. In this sense, we have designed POETRIES, which is a dynamic performance tuning tool based on the idea that a performance model could be associated to the high-level structure of the application. This way, the tool could efficiently make better tuning decisions. Specifically, we focus this work on the definition of the performance model associated to applications developed with the Master-Worker framework.

关键词： parallel processing systems

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high-level data-access analysis for characterisation of (Sub)task-level parallelism in Java

High-level data-access analysis for characterisation of (Sub...

引用

9th international workshop on high-level parallel programming models and supportive environments

作者： Stahl, R Pasko, R Catthoor, R Lauwereins, R Verkest, D IMEC VZW B-3001 Louvain Belgium

ISBN: (纸本)0769521517

In the era of future embedded systems the designer is confronted with multi-processor systems both for performance and energy reasons. Exploiting (sub)task-level parallelism is becoming crucial because the instruction-level parallelism alone is insufficient. The challenge is to build compiler tools that support the exploration of the task-level parallelism in the programs. To achieve this goal, we have designed an analysis framework to evaluate the potential parallelism from sequential object-oriented programs. parallel-performance and data-access analysis are the crucial techniques for estimation of the transformation effects. We have implemented support for platform-independent data-access analysis and profiling of Java programs, which is an extension to our earlier parallel-performance analysis framework. The toolkit comprises automated design-time analysis for performance and data-access characterisation, program instrumentation, program-profiling support and post-processing analysis. We demonstrate the usability of our approach on a number of realistic Java applications.

关键词： Data reduction

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Rethinking the pipeline as object-oriented states with transformations

Rethinking the pipeline as object-oriented states with trans...

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9th international workshop on high-level parallel programming models and supportive environments

作者： MacDonald, S Szafron, D Schaeffer, J Univ Waterloo Sch Comp Sci Waterloo ON N2L 3G1 Canada

ISBN: (纸本)0769521517

The pipeline is a simple and intuitive structure to speed up many problems. Novice parallel programmers are usually taught this structure early on. However, expert parallel programmers typically eschew using the pipeline in coarse-grained applications because it has three serious problems that make it difficult to implement efficiently. First, processors are idle when the pipeline is not full. Second, load balancing is crucial to obtaining good speedup. Third, it is difficult to incrementally incorporate more processors into an existing pipeline. Instead, experts recast the problem as a master/slave structure which does not suffer from these problems. This paper details a transformation that allows programs written in a pipeline style to execute using the master/slave structure. parallel programmers can benefit from both the intuitive simplicity of the pipeline and the efficient execution of a master/slave structure. This is demonstrated by performance results from two applications.

关键词： Object oriented programming

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ODEPACK++: Refactoring the LSODE Fortran library for use in the CCA high performance component software architecture

ODEPACK++: Refactoring the LSODE Fortran library for use in ...

引用

9th international workshop on high-level parallel programming models and supportive environments

作者： Allan, BA Lefantzi, S Ray, J Sandia Natl Labs Livermore CA 94550 USA

ISBN: (纸本)0769521517

We present a case study of the alternatives and design trade-offs encountered when adapting an established numerical library into a form compatible with modern component-software implementation practices. Our study will help scientific software users, authors, and maintainers develop their own roadmaps for shifting to component-oriented software. The primary library studied, LSODE, and the issues involved in the adaptation are typical of many commonly used numerical libraries. We examine the adaptation of a related library, CVODE, and compare the impact on applications of the two different designs. The LSODE-derived components solve models composed with CCA components developed independently at the Argonne and Oak Ridge National Laboratories. The resulting applications run in the Ccaffeine framework implementation of the Commmon Component Architecture specification. We provide CCA-style interface specifications appropriate to linear equations, ordinary differential equations (ODE), and differential algebraic equations (DAE) solvers.

关键词： parallel programming interface design software decomposition common component architecture differential equations FORTRAN C plus object oriented

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Toward efficient compilation of user-defined extensible Fortran directives

Toward efficient compilation of user-defined extensible Fort...

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international workshop on high-level parallel programming models and supportive environments

作者： M. Rosing J. Nieplocha S. Yabusaki Pacific Northwest National Laboratory USA

关键词： parallel programming Conferences Program processors Runtime environment Runtime library Degradation Error correction Error analysis Information analysis Data analysis

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Abstractions for dynamic data distribution

Abstractions for dynamic data distribution

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international workshop on high-level parallel programming models and supportive environments

作者： S.J. Deitz B.L. Chamberlain L. Snyder University of Washington Seattle WA USA Cray Inc. Seattle WA USA

Processor layout and data distribution are important to performance-oriented parallel computation, yet high-level language support that helps programmers address these issues is often inadequate. This paper presents a trio of abstract high-level language constructs - grids, distributions, and regions - that let programmers manipulate processor layout and data distribution. Grids abstract processor sets, regions abstract index sets, and distributions abstract mappings from index sets to processor sets; each of these is a first-class concept, supporting dynamic data reallocation and redistribution as well as dynamic manipulation of the processor set. This paper illustrates uses of these constructs in the solutions to several motivating parallel programming problems.

关键词： programming profession parallel programming high level languages Manipulator dynamics Libraries Adaptive mesh refinement Insulation Concurrent computing Distributed computing high performance computing

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