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检索条件"任意字段=15th Symposium on Computer Architecture and High Performance Computing"

共 4650 条记录，以下是3911-3920 订阅

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An evaluation of processor co-allocation for different system configurations and job structures

An evaluation of processor co-allocation for different syste...

引用

14th symposium on computer architecture and high performance computing

作者： Bucur, AID Epema, DHJ Delft Univ Technol Fac Informat Technol & Syst NL-2600 GA Delft Netherlands

ISBN: (纸本)0769517722

In systems consisting of multiple clusters of processors such as our Distributed ASCI(1) Supercomputer (DAS), jobs mail request co-allocation, i.e., the simultaneous allocation of processors in different clusters. We simulate such systems ignoring,communication among the tasks of jobs, and determine the,,response times for different types and sizes of job requests';and for different numbers and sizes of clusters. In many cases we also compute or approximate the maximum utilization. We find that the numbers and sizes of the clusters and of the job components have a strong impact on performance, and that in many cases co-allocation is a viable choice.

关键词： Grid computing

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Concurrent and distributed data structures for multikey sorting on computer clusters - Extended abstract 16

Concurrent and distributed data structures for multikey sort...

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16th Annual International symposium on high performance computing Systems and Applications

作者： Fellah, A Univ Lethbridge Dept Math & Comp Sci Lethbridge AB T1K 3M4 Canada

ISBN: (纸本)0769516262

Summary form only given. this paper focuses on theoretical and practical aspects of the high-performance multikey sorting problem on computer clusters, with particular emphasis on the Alpha Maci Cluster, a world-class high-performance supercomputer that has many processors interconnected by a wide range of high-speed network connections. Even though the focus of this paper is on multikey sorting problems, developing new data structures and techniques for designing high-performance algorithms on computer clusters are of both theoretical and practical interest. We investigate strategies for developing, implementing, and refining high-performance algorithms for sorting multi-dimensional data on computer clusters. In addition, maximizing the performance of such distributed memory machines requires efficient data structures coupled with good load balancing. © 2002 IEEE.

关键词： Sorting

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InfoGram:: A grid service that supports both information queries and job execution 11

InfoGram:: A grid service that supports both information que...

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11th IEEE International symposium on high performance Distributed computing (HPDC-11)

作者： von Laszewski, G Gawor, J Peña, CJ Foster, I Argonne Natl Lab Argonne IL 60439 USA

ISBN: (纸本)0769516866

the research described in this paper is performed as part of the Globus Project. It introduces a new Grid service called InfoGram that combines the ability of serving as information service and as a job execution service. Previously, both services were architected and implemented within the Globus Toolkit as two different services with different wire protocols. Our service demonstrates a significant simplification of the architecture while treating job submissions and information queries alike. the advantage of our service is that it provides backwards compatibility to existing Grid services, while at the same time providing forwards compatibility to the emerging Web services world. Part of the work conducted within this effort is already reused by the current Open Grid Services architecture prototype implementation.

关键词： computer architecture computer science Information security Laboratories Project management Protocols Prototypes Resource management Web services Wire

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Lightweight self-organizing frameworks for metacomputing 11

Lightweight self-organizing frameworks for metacomputing

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11th IEEE International symposium on high performance Distributed computing (HPDC-11)

作者： Sunderam, V Kurzyniec, D Emory Univ Dept Math & Comp Sci Atlanta GA 30322 USA

ISBN: (纸本)0769516866

A novel component-based, service-oriented framework for distributed metacomputing is described. Adopting a provider-centric view of resource sharing, this project emphasizes lightweight software infrastructures that maintain minimal state, and interface to current and emerging distributed computing standards. Resource owners host a software backplane onto which owners, clients, or third-party resellers may load components or component-suites that deliver value added services without compromising owner security or control. Standards-based descriptions of services facilitate publication and discovery, via established schemes. the architecture of the container framework, design of components, security and access control schemes, and preliminary experiences are described in this paper.

关键词： Access control Backplanes computer architecture Containers Distributed computing Metacomputing Resource management Security Software maintenance Software standards

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A parallel approximation hitting set algorithm for gene expression analysis 14

A parallel approximation hitting set algorithm for gene expr...

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14th symposium on computer architecture and high performance computing

作者： Ruchkys, DP Song, SW Univ Sao Paulo Inst Matemat & Estatist Dept Ciencia Computacao BR-05508090 Sao Paulo Brazil

ISBN: (纸本)0769517722

With the recent DNA-microarray technology, it is possible to measure the expression levels of thousands of genes simultaneously in the same experiment. A genetic network is a model that describes how the expression level of each gene is affected by the expression levels of other genes in the network. Given, the results of an experiment with n genes and m measures over time (m << n), we consider the problem of finding a subset of genes (k genes, where k << n) that explain the expression level of a given target gene under study. We consider the coarse-grained multicomputer (CGM) model, with p processors. In this paper we first present a sequential approximation algorithm of O(m(4) n) time and O(m(2)n) space. the main result is a new parallel approximation algorithm that determines the k genes in O(m(4) n/p) local computing time plus O(k) communication rounds, and with space requirement of O(m(2) n/p). the p factor in the parallel time and space complexities indicates a,good parallelization. We also show preliminary, promising,experimental results on a Beowulf machine. To our knowledge there are no CGM algorithms for the problem considered in this paper.

关键词： Algorithm design and analysis Approximation algorithms computer networks DNA computing Gene expression Genetics Monitoring Space technology Time measurement User-generated content

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Datapath merging and interconnection sharing for reconfigurable architectures

Datapath merging and interconnection sharing for reconfigura...

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15th International symposium on System Synthesis

作者： Moreano, N Araujo, G Huang, ZN Malik, S IC UNICAMP BR-13084971 Campinas SP Brazil

ISBN: (纸本)1581135769

Recent work in reconfigurable computing research has shown that a substantial performance speedup can be achieved through architectures that map the most relevant application inner-loops to a reconfigurable datapath. Any solution to this problem must be able to synthesize a datapath for each loop and to merge them together into a single reconfigurable datapath. the main contribution of this paper is a novel graph-based technique for the datapath merge problem. this approach is based on the solution of a maximum clique problem that merges datapaths one at a time. A set of experiments, using the MediaBench benchmark, shows that the proposed technique produces 24% fewer datapath interconnections than a previous solution to this problem.

关键词： reconfigurable computing high level and architectural synthesis

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Scalability of a distributed neural information retrieval system 11

Scalability of a distributed neural information retrieval sy...

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11th IEEE International symposium on high performance Distributed computing (HPDC-11)

作者： Weeks, M Hodge, VJ Austin, J Univ York Dept Comp Sci York YO1 5DD N Yorkshire England

ISBN: (纸本)0769516866

Summary form only given. AURA (Advanced Uncertain Reasoning architecture) is a generic family of techniques and implementations intended for high-speed approximate search and match operations on large unstructured datasets. AURA technology is fast, economical, and offers unique advantages for finding near-matches not available with other methods. AURA is based upon a high-performance binary neural network called a correlation matrix memory (CMM). Typically, several CMM elements are used in combination to solve soft or fuzzy pattern-matching problems. AURA takes large volumes of data and constructs a special type of compressed index. AURA finds exact and near-matches between indexed records and a given query, where the query itself may have omissions and errors. the degree of nearness required during matching can be varied through thresholding techniques. the PCI-based PRESENCE (Parallel Structured Neural computing Engine) card is a hardware-accelerator architecture for the core CMM computations needed in AURA-based applications. the card is designed for use in low-cost workstations and incorporates 128 MByte of low-cost DRAM for CMM storage. To investigate the scalability of the distributed AURA system, we implement a word-to-document index of an AURA-based information retrieval system, called MinerTaur, over a distributed PRESENCE CMM. © 2002 IEEE.

关键词： Aircraft Artificial neural networks computer architecture computer science Concurrent computing Coordinate measuring machines Environmental economics Information retrieval Neural networks Scalability

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Coven - a framework for high performance problem solving environments 11

Coven - a framework for high performance problem solving env...

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11th IEEE International symposium on high performance Distributed computing (HPDC-11)

作者： DeBardeleben, NA Ligon, WB Pandit, S Stanzione, DC Clemson Univ Holcombe Dept Elect & Comp Engn Parallel Architecture Res Lab Clemson SC 29634 USA

ISBN: (纸本)0769516866

this work presents the design of the Coven framework for construction of Problem Solving Environments (PSEs) for parallel computers. PSEs are an integral part of modern high performance computing (HPC) and Coven attempts to simplify PSE construction. Coven targets Beowulf cluster parallel computers but independent of any particular domain for the PSE. Multi-threaded parallel applications are created with Coven that are capable of supporting most of the constructs in a typical parallel programming language. Coven uses an agent-based front-end which allows multiple custom interfaces to be constructed Examples of the use of Coven in the construction of prototype PSEs are shown, and the effectiveness of these PSEs is evaluated in terms of the performance of the applications they generate.

关键词： Application software Computational modeling computer simulation Concurrent computing high performance computing Parallel architectures Parallel programming Problem-solving Prototypes Writing

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Loose loops sink chips 8

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8th International symposium on high-performance computer architecture

作者： Borch, E Tune, E Manne, S Emer, J Intel Corp VSSAD Santa Clara CA 95051 USA

ISBN: (纸本)0769515258

this paper explores the concept of micro-architectural loops and discusses their impact on processor pipelines. In particular, we establish the relationship between loose loops and pipeline length and configuration, and show their impact on performance. We then evaluate the load resolution loop, in detail and propose the distributed register algorithm (DRA) as a way of reducing this loop. It decreases the performance loss due to load mis-speculations by reducing the issue-to-execute latency, in the pipeline. A new loose loop is introduced into the pipeline by the DRA, but the frequency of mis-speculations is very, low. the reduction in latency from issue to execute, along with a low mis-speculation rate in the DRA result in up to a 4% to 15% improvement in performance using a detailed architectural simulator.

关键词： Computational modeling computer science Delay Feedback loop Frequency Hazards performance loss Pipelines Process design Registers

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Software architecture-based adaptation for grid computing 11

Software architecture-based adaptation for grid computing

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11th IEEE International symposium on high performance Distributed computing (HPDC-11)

作者： Cheng, SW Garlan, D Schmerl, B Steenkiste, P Hu, NN Carnegie Mellon Univ Sch Comp Sci Pittsburgh PA 15213 USA

ISBN: (纸本)0769516866

Grid applications must increasingly self-adapt dynamically to changing environments. In most cases, adaptation has been implemented in an ad hoc fashion, on a per-application basis. this paper describes work which generalizes adaptation so that it can be used across applications by providing an adaptation framework. this framework uses a software architectural model of the system to analyze whether the application requires adaptation, and allows repairs to be written in the context of the architectural model and propagated to the running system. In this paper, we exemplify our framework by applying it to the domain of load-balancing a client-server system. We report on an experiment conducted using our framework, which illustrates that this approach maintains architectural requirements.

关键词： Application software Availability computer networks computer science Grid computing Humans Mechanical factors Monitoring Network servers Runtime

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