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检索条件"任意字段=PDSE 2000: International Symposium on Software Engineering for Parallel and Distributed Systems"

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Fast synchronization on scalable cache-coherent multiprocessors using hybrid primitives

Fast synchronization on scalable cache-coherent multiprocess...

引用

international symposium on parallel and distributed Processing (IPDPS)

作者： D.S. Nikolopoulos T.S. Papatheodorou High Performance Information Systems Laboratory Department of Computer Engineering and Informatics University of Patras Patras Greece

This paper presents a new methodology for implementing fast synchronization on scalable cache-coherent multiprocessors, through the use of hybrid primitives. Hybrid primitives leverage commodity hardware to speed-up the execution of the atomic remote Read-Modify-Write (RMW) instructions employed in synchronization algorithms to resolve contending processors, while exploiting the caches to reduce network traffic during the waiting and release phases of a synchronization primitive. We present a systematic methodology for transforming any synchronization primitive that uses RMW instructions into a hybrid one. We then provide experimental evidence on the effectiveness of using hybrid primitives in the implementation of spin locks, barriers and lock-free queues, in microbenchmarks and parallel applications on a SGI Origin 2000.

关键词： Hardware software performance Application software Scalability Information systems Laboratories High performance computing Informatics Computer architecture Concurrent computing

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Applying distributed object technology to network planning

Applying distributed object technology to network planning

引用

IEEE international Workshop on software engineering for parallel and distributed systems

作者： Wessels Bishop Computer Science Department University of Pretoria Pretoria South Africa

Describes a generic interface through which a planning tool or design aid can be connected to a telecommunications network. In today's complex and ever-changing networks, network operators need to plan their networks very accurately and rapidly. Sacrificing accuracy generally has severe impacts on the scalability and maintainability of the network at a later stage. A proliferation of planning algorithms/tools exists in both the literature and industry today: these implement advanced algorithms and supply complex answers. It has been our experience that these calculations seldom have any direct use in reducing network costs through optimising network configuration in practice. The key to unlocking the benefits of these planning algorithms lies in making the network planning process a generic open standards-based and closed-loop process, through the implementation of generic interfaces which abstract the information required away from the physical network details. This paper describes the design of such an interface, which was then implemented in a conceptual evaluation environment in order to gauge the complexity and practicality of the interface concept. We use the capabilities of Java and CORBA to achieve the necessary scalability and portability. The Generic Network Planning Interface (GNPI) concept is shown to be powerful enough to abstract the network information into generic network objects and to provide standard method calls to access these objects in a distributed environment.

关键词： Communication system operations and management

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High performance parametric modeling with Nimrod/G: killer application for the global grid?

High performance parametric modeling with Nimrod/G: killer a...

引用

international symposium on parallel and distributed Processing (IPDPS)

作者： D. Abramson J. Giddy L. Kotler School of Computer Science and Software Engineering Monash University Clayton VIC Australia CRC for Distributed Systems Technology University of Queensland Saint Lucia QLD Australia Australian Radiation Protection and Nuclear Safety Agency Yallambie VIC Australia

This paper examines the role of parametric modeling as an application for the global computing grid, and explores some heuristics which make it possible to specific soft real time deadlines for larger computational ex... 详细信息

关键词： Parametric statistics Grid computing Application software Australia Computational modeling Biological system modeling Road safety Security Computer science Cyclic redundancy check

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parallel FEM simulation of crack propagation - Challenges, status, and perspectives

Parallel FEM simulation of crack propagation - Challenges, s...

引用

IEEE international parallel and distributed Processing symposium, IPDPS 2000

作者： Carter, Bruce Chen, Chuin-Shan Paul Chew, L. Chrisochoides, Nikos Gao, Guang R. Heber, Gerd Ingraffea, Antony R. Krause, Roland Myers, Chris Nave, Demian Pingali, Keshav Stodghill, Paul Vavasis, Stephen Wawrzynek, Paul A. Cornell Fracture Group Cornell University Rhodes Hall IthacaNY14853 United States CS Department Cornell University Upson Hall IthacaNY14853 United States CS Department University of Notre Dame Notre DameIN46556 United States EECIS Department University of Delaware NewarkDE19716 United States Center for Comp. Mech Washington University Saint LouisMO63130 United States

ISBN: (纸本)354067442X

Understanding how fractures develop in materials is crucial to many disciplines, e.g., aeronautical engineering, material sciences, and geophysics. Fast and accurate computer simulation of crack propagation in realistic 3D structures would be a valuable tool for engineers and scientists exploring the fracture process in materials. In the following, w e will describe a next generation crack propagation simulation software that aims to make this potential a reality. © Springer-Verlag Berlin Heidelberg 2000.

关键词： Crack propagation

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Scheduling with advanced reservations

Scheduling with advanced reservations

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international symposium on parallel and distributed Processing (IPDPS)

作者： W. Smith I. Foster V. Taylor Electric aland Computer Engineering Department Northwestern University Evanston IL USA Mathematics and Computer Science Division Argonne National Laboratory IL USA

Some computational grid applications have very large resource requirements and need simultaneous access to resources from more than one parallel computer. Current scheduling systems do not provide mechanisms to gain such simultaneous access without the help of human administrators of the computer systems. In this work, we propose and evaluate several algorithms for supporting advanced reservation of resources in supercomputing scheduling systems. These advanced reservations allow users to request resources from scheduling systems at specific times. We find that the wait times of applications submitted to the queue increases when reservations are supported and the increase depends on how reservations are supported. Further, we find that the best performance is achieved when we assume that applications can be terminated and restarted, backfilling is performed, and relatively accurate run-time predictions are used.

关键词： Grid computing Processor scheduling Application software Concurrent computing distributed computing Mathematics Computer science Humans Computer applications Instruments

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FIMD-MPI: a tool for injecting faults into MPI application

FIMD-MPI: a tool for injecting faults into MPI application

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international symposium on parallel and distributed Processing (IPDPS)

作者： D.M. Blough Peng Liu School of Electrical & Computer Engineering Georgia Institute of Technology Atlanta GA USA Department of Electrical & Computer Engineering University of California Irvine CA USA

parallel computing is seeing increasing use in critical applications. The need therefore arises to test the robustness of parallel applications in the presence of exceptional conditions, or faults. Communication-software-based fault injection is an extremely flexible approach to robustness testing in message-passing parallel computers. A fault injection methodology and tool that use this approach are presented. The tool, known as FIMD-MPI, allows injection of faults into MPI-based applications. The structure and operation of FIMD-MPI are described and the use of the tool is illustrated on an example fault-tolerant MPI application.

关键词： Application software Testing Concurrent computing Fault tolerance Computer errors Clocks Synchronization Error correction parallel algorithms Timing

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Improving parallel job scheduling by combining gang scheduling and backfilling techniques

Improving parallel job scheduling by combining gang scheduli...

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international symposium on parallel and distributed Processing (IPDPS)

作者： Y. Zhang H. Franke J.E. Moreira A. Sivasubramaniam Department of Computer Science & Engineering Pennsylvania State University University Park PA USA IBM Thomas J. Watson Research Center Yorktown Heights NY USA

Two different approaches have been commonly used to address problems associated with space sharing scheduling strategies: (a) augmenting space sharing with backfilling, which performs out of order job scheduling; and (b) augmenting space sharing with time sharing, using a technique called coscheduling or gang scheduling. With three important experimental results-impact of priority queue order on backfilling, impact of overestimation of job execution times, and comparison of scheduling techniques-this paper presents an integrated strategy that combines backfilling with gang scheduling. Using extensive simulations based on detailed models of realistic workloads, the benefits of combining backfilling and gang scheduling are clearly demonstrated over a spectrum of performance criteria.

关键词： Processor scheduling Delay Computer science Electronic switching systems Filling Ear Large-scale systems parallel machines Application software Computer simulation

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A task duplication based scheduling algorithm for heterogeneous systems

A task duplication based scheduling algorithm for heterogene...

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international symposium on parallel and distributed Processing (IPDPS)

作者： S. Ranaweera D.P. Agrawal Department of Electrical Computer Engineering and Computer Science University of Cincinnati Cincinnati OH USA

Optimal scheduling of tasks of a directed acyclic graph (DAG) onto a set of processors is a strong NP-hard problem. In this paper we present a scheduling scheme called TDS to schedule tasks of a DAG onto a heterogeneous system. This models a network of workstations, with processors of varying computing power. The primary objective of this scheme is to minimize schedule length and scheduling time itself. The existing task duplication based scheduling scheme is primarily done for totally homogeneous systems. We compare the performance of this algorithm with an existing scheduling scheme for heterogeneous processors called BIL. In initial simulations TDS has been observed to generate scheduling lengths shorter than that of BIL, for communication-to-computation cost ratios (CCR) of 0.2 to 1. Moreover TDS is far more superior than BIL as far as scheduling time is concerned.

关键词： Scheduling algorithm Clustering algorithms Computer networks Application software Partitioning algorithms Computer science NP-hard problem Power system modeling Computational modeling Computational efficiency

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Reaching efficient fault-tolerance for cooperative applications

Reaching efficient fault-tolerance for cooperative applicati...

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international Computer Performance and Dependability symposium

作者： P. Sobe Institute of Computer Engineering Medical University of Lübeck Germany

Cooperative applications are widely used, e.g. as parallel calculations or distributed information processing systems. Whereby such applications meet the users demand and offer a performance improvement, the susceptibility to faults of any used computer node is raised. Often a single fault may cause a complete application failure. On the other hand, the redundancy in distributed systems can be utilized for fast fault detection and recovery. So, we followed an approach that is based an duplication of each application process to detect crashes and faulty functions of single computer nodes. We concentrate on two aspects of efficient fault-tolerance-fast fault detection and recovery without delaying the application progress significantly. The contribution of this work is first a new fault detecting protocol for duplicated processes. Secondly, we enhance a roll forward recovery scheme so that it is applicable to a set of cooperative processes in conformity to the protocol.

关键词： Fault tolerance Application software Fault detection Access protocols Biomedical engineering Real time systems Message passing Memory architecture Fault tolerant systems Routing protocols

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Exploration of the spatial locality on emerging applications and the consequences for cache performance

Exploration of the spatial locality on emerging applications...

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international symposium on parallel and distributed Processing (IPDPS)

作者： M. Kampe F. Dahlgren Department of Computer Engineering Chalmers University of Technology Sweden Ericsson Mobile Communications AB Lund Sweden

The performance gap between processors and memory is increasing, making the cache hit-rate paramount for performance. Studies show room for improvement, especially in data caches. The cache effectiveness is dictated by software locality, hence the software behavior directs the cache performance. This paper presents a framework for studying spatial locality. It focuses on the characteristics of the spatial locality in terms of closeness in time and space, to get the amount of accessed sequential data and the potential for cache hits. By using the framework we gain knowledge for improving the cache performance. Our experiment consists of a program driven simulator and 11 important applications. We show a large performance potential in the data cache with up to 75% less miss rate, exploiting spatial locality. In order to investigate where potential bottlenecks are located we make a simple implementation of a scheme to exploit this spatial locality.

关键词： Time measurement Interference Application software Mobile communication Lab-on-a-chip Hardware Instruments

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