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

作者： Bahi, JM Contassot-Vivier, S Couturier, R LIFC IUT Belfort Montebeliard F-90016 Belfort France

ISBN: (纸本)0769516262

the subject of this paper is to show the very high power of asynchronism for iterative algorithms in the context of global computing, that is to say, with machines scattered all around the world. the question is whether or not asynchronism helps to reduce the communication penalty and the overall computation time of a given parallel algorithm. the asynchronous programming model is applied to a given problem implemented with a multi-threaded environment and tested over two kinds of clusters of workstations;a homogeneous local cluster and a heterogeneous non-local one. the main features of this programming model are exhibited and the high efficiency and interest of such algorithms is pointed out.

关键词： Iterative methods

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the T-CREST Approach of Compiler and WCET-Analysis Integration 16

The T-CREST Approach of Compiler and WCET-Analysis Integrati...

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16th IEEE International symposium on Object/Component/Service-Oriented Real-Time Distributed computing (ISORC)

作者： Puschner, Peter Prokesch, Daniel Huber, Benedikt Knoop, Jens Hepp, Stefan Gebhard, Gernot Vienna Univ Technol Inst Comp Engn A-1040 Vienna Austria Vienna Univ Technol Inst Comp Languages A-1040 Vienna Austria AbsInt Angew Informat GmbH Saarbrucken Germany

ISBN: (纸本)9781479921133

A good worst-case performance and the availability of high-quality bounds on the worst-case execution time (WCET) of tasks are central for the construction of hard real-time computer systems for safety-critical applications. Timing-predictability of the whole software/hardware system is a necessary prerequisite to achieve this. We show that a predictable architecture and the tight and seamless integration of compilation and WCET analysis is beneficial to achieve the initial two goals of good worst-case performance and the availability of high-quality bounds on the WCET of computation tasks. Information generated by the compiler improves the WCET analysis. Detailed timing feedback from the WCET analysis helps the compiler to reduce the worst case execution time. the paper describes the interface and the interaction between the industrial strength WCET analysis tool and the compiler as developed in the EU FP7 T-CREST project, and demonstrates the cooperation of these tools with an illustrative example.

关键词： Hardware Optimization Pipelines Registers Software Switches Timing compilers Registers pipeline Switches computer hardware computer software piping seamless integration execution time

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Leveraging high performance computing for Bioinformatics: A Methodology that Enables a Reliable Decision-Making 16

Leveraging High Performance Computing for Bioinformatics: A ...

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16th IEEE/ACM International symposium on Cluster, Cloud and Grid computing (CCGrid)

作者： Ferro, Mariza Nicolas, Marisa F. Saji, Quadalupe del Rosario Q. Mury, Antonio R. Schulze, Bruno Natl Lab Sci Comp Petropolis RJ Brazil

ISBN: (纸本)9781509024537

Bioinformatics could greatly benefit from increased computational resources delivered by high performance computing. However, the decision-making about which is the best architecture to deliver good performance for a set of Bioinformatics applications is a hard task. the traditional way is finding the architecture with a high theoretical peak of performance, obtained with benchmark tests. But, this is not an assured way for this decision, because each application of Bioinformatics has different computational requirements, which frequently are much different from usual benchmarks. We developed a methodology that assists researchers, even when their specialty is not high performance computing, to define the best computational infrastructure focused on their set of scientific application requirements. For this purpose, the methodology enables to define representative evaluation tests, including a model to define the correct benchmark, when the tests endorsed by the methodology could not be fully used. Further, a Gain Function allows a reliable decision-making based on the performances of a set of applications and architectures. It is also possible to consider the relative importance between applications and also between cost and performance.

关键词： high performance computing performance evaluation scientific applications bioinformatics

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Best of SBAC-PAD 2012

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PARALLEL computing 2014年第9期40卷 512-513页

作者： Schnorr, Lucas Mello Alexandre Navaux, Philippe Olivier Univ Fed Rio Grande do Sul Inst Informat BR-91501970 Porto Alegre RS Brazil

this special issue presents new trends in computer architecture and in parallel and distributed systems. It is based on the best papers of the 24th International symposium on computer architecture and high performance computing, which was held in New York, NY, USA on October 24-26, 2012 in the Columbia University. the authors were invited to provide extended versions of the papers presented in the conference, taking into account suggestions by the double-blinded peer review process and comments gathered during the conference.

关键词： computer architecture Parallel and distributed systems high performance computing

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A proxy-based uncoordinated checkpointing scheme with pessimistic message logging for mobile grid systems 07

A proxy-based uncoordinated checkpointing scheme with pessim...

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16th International symposium on high performance Distributed computing 2007, HPDC'07 and Co-Located Workshops

作者： Imran, Nomica Rao, Imran Lee, Young-Koo Lee, Sungyoung Ubiquitous Computing Lab. Dept. of Comp. Eng. Kyung Hee University Korea Republic of NICTA Victoria Labs Dept. of CSSE University of Melbourne Australia

ISBN: (纸本)1595936734

Due to mobility, energy limitations, and unreliable wireless channels, applications running on mobile devices suffer from faults such as temporary disconnection and data loss. We, therefore, need a fault tolerance mechanism to guarantee their smooth working and performance. In this paper, we present a novel proxy-based uncoordinated checkpointing scheme with pessimistic message logging for efficient fault recovery in mobile Grid system. Simulation results show that this scheme is reliable, efficient and, at the sametime, consumes less network traffic.

关键词： Security of data

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Load scheduling in a cloud based massive video-storage environment 16

Load scheduling in a cloud based massive video-storage envir...

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16th International symposium on Symbolic and Numeric Algorithms for Scientific computing (SYNASC)

作者： Bayyapu, Karunakar Reddy Fischer, Paul Tech Univ Denmark Dept Appl Math & Comp Sci DK-2800 Lyngby Denmark

ISBN: (纸本)9781479984480

We propose an architecture for a storage system of surveillance videos. Such systems have to handle massive amounts of incoming video streams and relatively few requests for replay. In such a system load (i.e., write requests) scheduling is essential to guarantee performance. Large-scale data-storage system (LSDSS) is an emerging hosting facility for video-storage, which has a very high number of writes while most of the videos are never or rarely watched. We discuss the design and implementation of LSDSS and load scheduling in autonomous storage environments called datacenters in LSDSS. A datacenter (DC) is the basic concept in our LSDSS, which has the self-management system to store data efficiently. A LSDSS consists of many DCs organized in a hierarchy fashion, thereby decentralizing load scheduling tasks. Because DC has a simple design, load scheduling is particularly suited for implementation on a real-time video surveillance and allows to make scheduling decisions. We also discuss experimental results that clearly show the advantage of load scheduling over the widely known base load scheduling.

关键词： cloud computing computer centres scheduling video databases video surveillance DC LSDSS autonomous storage environments cloud based massive video-storage environment datacenters incoming video streams large-scale data-storage system real-time video surveillance scheduling decisions system load scheduling Bandwidth computer architecture Scheduling Scheduling algorithms Servers Videos architecture cloud storage distributed storage load scheduling video storage load dispatching Cloud computing Videotapes video databases Scheduling algorithms computer architecture video monitoring Servers direct current Building construction architecture Bandwidth

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JolokiaC++: An annotation based compiler framework for GPGPUs 16

JolokiaC++: An annotation based compiler framework for GPGPU...

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16th IEEE International Conference on high performance computing and Communications, HPCC 2014, 11th IEEE International Conference on Embedded Software and Systems, ICESS 2014 and 6th International symposium on Cyberspace Safety and Security, CSS 2014

作者： Patel, Vibha Aggarwal, Sanjeev Karkare, Amey Department of Computer Science and Engineering India Institute of Technology Kanpur India

ISBN: (纸本)9781479961238

We present JolokiaC++, an annotation based compiler framework which generates high quality CUDA (Compute Unified Device architecture) code for GPUs. Our contributions include: (1) developing explicit and implicit annotations with illustrations of their use in C++, (2) showing the utility of these annotations by providing comparison code snippets, which demonstrates the ease of programming and performance gains, (3) evaluating their effectiveness on kernels like Blacks holes, Matrix-Vector multiplication, Matrix-Matrix multiplication, Jacobi 1D & 2D, Heat 2D, Vector Addition and Convolution. © 2014 IEEE.

关键词： Jacobian matrices

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Using spare network computing power for genetic algorithm problems 16

Using spare network computing power for genetic algorithm pr...

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

作者： Hamilton-Wright, A Stacey, D Univ Waterloo Dept Syst Design Engn Waterloo ON N2L 3G1 Canada

ISBN: (纸本)0769516262

Traditional network design incorporates a failure-recovery model in order to allow calculation of problems independent of knowledge of the network tool layer this paper explores the possibilities of improving the calculation throughput by constructing a tool for the specific solution of problems which have an inherent ability to deal with partial calculation failure. Using a modified Genetic Algorithm as the client tool, the amount of information the network layer needs to have is brought to an extremely minimal level;this allows for a large scalability factor of the tool due to the reduction of network management tables.

关键词： Genetic algorithms

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Computational chemistry applications: performance on high-end and commodity-class computers 16

Computational chemistry applications: Performance on high-en...

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

作者： Guest, MF Sherwood, P SERC Daresbury Lab CLRC Dept Comp Engn & Sci Warrington WA4 4AD Cheshire England

ISBN: (纸本)0769516262

Beowulf clusters, on face value, offer the potential of a viable cost effective alternative for the provision of high performance computing. In this paper we compare the performance of Beowulf clusters built from commodity "off the shelf" components in the support of major research and production codes, with current high-end hardware such as the IBM SP, Compaq AlphaServer SC and SGI Origin 3800. the results concentrate on the application area of computational chemistry. Benchmark data on six commodity-based systems (CS1-CS6) featuring Intel, AMD Athlon and Alpha CPU architectures coupled to traditional Beowulf interconnect, such as Myrinet and Ethernet, are presented. Furthermore, we provide performance data on systems utilising the Quadrics QSNet interconnect technology, and initial results from a prototype of the Cray Supercluster.

关键词： Computational chemistry

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Using queue structures to improve job reliability 07

Using queue structures to improve job reliability

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16th International symposium on high performance Distributed computing 2007, HPDC'07 and Co-Located Workshops

作者： Hacker, thomas J. Meglicki, Zdzislaw Discovery Park Cyber Center Purdue University 250 N. University Street West Lafayette IN 47907 Office of the Vice President for Information Technology Indiana University Bloomington IN 47405

ISBN: (纸本)1595936734

Many high performance computing systems today exploit the availability and remarkable performance characteristics of stand alone server systems and the impressive price / performance ratio of commodity components. Small scale HPC systems, in the range from 16 to 64 processors, have enjoyed significant popularity and are an indispensable tool for the research community. Scaling up to hundreds and thousands of processors, however, has exposed operational issues, which include system availability and reliability. In this paper, we explore the impact of individual component reliability rates on the overall reliability of an HPC system. We derive a mathematical model for determining the failure rate of the system, the probability of failure of a job running on a subset of the system, and show how to design a reasonable queue structure to provide a reliable system over abroad job mix. We also explore the impact of reliability and queue structure on checkpoint intervals and recovery. Our results demonstrate that it is possible to design a reliable high performance computing system with very good operational reliability characteristics from a collection of moderately reliable components. Copyright 2007 ACM.

关键词： Distributed computer systems

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