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检索条件"任意字段=8th International Conference on Parallel and Distributed Computing, Applications and Technologies"

共 1808 条记录，以下是991-1000 订阅

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Non-clairvoyant Assignment of Bag-of-Tasks applications Across Multiple Clouds

Non-clairvoyant Assignment of Bag-of-Tasks Applications Acro...

引用

IEEE international conference on parallel and distributed computing, applications and technologies (PDCAT)

作者： M. Hoseiny Farahabady Young Choon Lee Albert Y. Zomaya The University of Sydney Sydney NSW AU Centre for Distributed and High Performance Computing School of Information Technologies University of Sydney NSW Australia

ISBN: (纸本)9781467357043

Bag-of-Tasks applications are often composed of a large number of independent tasks, hence, they can easily scale out. With public clouds, the (dynamic) expansion of resource capacity in private clouds is much facilitated. Clearly, cost efficiently running BoT applications in a multi-cloud environment is of great practical importance. In this paper, we investigate how efficiently multiple clouds can be exploited for running BoT applications and present a fully polynomial time randomized approximation scheme (FPRAS) as a novel task assignment algorithm for BoT applications. the resulting task assignment can be optimized in terms of cost, make span or the tradeoff between them. the objective function incorporated into our algorithm is devised in the way the optimization objective is tunable based on user preference. Our task assignment decisions are made without any prior knowledge of the processing time of tasks, i.e., non-clairvoyant task assignment. We adopt a Monte Carlo sampling method to estimate unknown task running time. the experimental results shows our algorithm approximates the optimal solution with little overhead.

关键词： Cloud computing Estimation Equations Optimization Mathematical model Linear programming Approximation methods

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A QoS Scheduling Scheme with Availability Constraint in distributed Systems

A QoS Scheduling Scheme with Availability Constraint in Dist...

引用

IEEE international conference on parallel and distributed computing, applications and technologies (PDCAT)

作者： Tong Zhao Kenli Li Zheng Xiao Qin Xiao College of Information Science and Engineering Hunan University Changsha Hunan CN College of Information Science and Engineering Hunan University Changsha China China Auburn University Auburn AL US

An efficient resource management mechanism is important in a heterogeneous system to discover available resources, to allocate an appropriate subset of resources to applications, and to map data or tasks onto selected resources. the key component, tasks scheduling, draws our attention. Make span is the principal concern many existing researches. But, other QoS requirements are also important in more and more realistic applications. Like Grid service it is expected that the service provider be reliable, robust, or highly available. In this study, an existing availability-aware scheduling model called SSAC is investigated first. then, we proposed an optimization approach to increase the availability and to reduce the make span of tasks running in heterogeneous systems. three quantitative conditions are used to guide the optimization. Our experimental results show that compared with three existing solutions (Minmin, SSAC and ACO), our algorithm significantly improves the availability and performance of multiclass tasks running in heterogeneous systems.

关键词： Availability Schedules Optimization Scheduling Computational modeling Scheduling algorithms

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the parallel computing of a molecular docking algorithm using the JavaSpaces service

The parallel computing of a molecular docking algorithm usin...

引用

international conference on Sciences of Electronics, technologies of Information and Telecommunications (SETIT)

作者： Mahdjoub Youcef Messabih Belhadri IVARM Université des Sciences et de la Technologie d'Oran Algeria Université des Sciences et de la Technologie d'Oran Algeria

the molecular docking is the focus of practical applications such as protein engineering and drug design. A docking algorithm is a procedure that predicts the assembly of two molecules like a key and a lock. To screen a large library of molecules, a docking algorithm requires high performance computing. parallel and distributed applications have long been recognized as powerful computational tools and effective in the field of bioinformatics. Jini technology is one of the powerful infrastructures network for building and deploying distributed systems that are organized as a federation of services. JavaSpaces is one of the services that come bundled with Jini, it is a shared associative memory accessible by the network and allows an easily developing of a massively parallel and distributed applications. this paper discusses the use of the JavaSpaces service to build a distributed application in order to minimize the running time of a molecular docking algorithm.

关键词： Proteins parallel processing Prediction algorithms Computational modeling Load modeling Java Computers

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Enhancing the Performance of a Multiplayer Game by Using a parallelizing Compiler

Enhancing the Performance of a Multiplayer Game by Using a P...

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17th international conference on Computer Games (CGAMES) - AI, Animation, Mobile, Interactive Multimedia, Educational and Serious Games

作者： Al-Dosary, Yasir I. M. Kimura, Keiji Kasahara, Hironori Narita, Seinosuke Waseda Univ Dept Comp Sci & Engn Shinjuku Ku Tokyo 1698555 Japan

ISBN: (纸本)9781467311199

Video Games have been a very popular form of digital entertainment in recent years. they have been delivered in state of the art technologies that include multi-core processors that are known to be the leading contributor in enhancing the performance of computer applications. Since parallel programming is a difficult technology to implement, that field in Video Games is still rich with areas for advancements. this paper investigates performance enhancement in Video Games when using parallelizing compilers and the difficulties involved in achieving that. this experiment conducts several stages in attempting to parallelize a well-renowned sequentially written Video Game called ioquake3. First, the Game is profiled for discovering bottlenecks, then examined by hand on how much parallelism could be extracted from those bottlenecks, and what sort of hazards exist in delivering a parallel-friendly version of ioquake3. then, the Game code is rewritten into a hazard-free version while also modified to comply with the parallelizable-C rules, which crucially aid parallelizing compilers in extracting parallelism. Next, the program is compiled using a parallelizing compiler called OSCAR (Optimally Scheduled Advanced Multiprocessor) to produce a parallel version of ioquake3. Finally, the performance of the newly produced parallel version of ioquake3 on a Multi-core platform is analyzed. the following is found: (1) the parallelized game by the compiler from the revised sequential program of the game is found to achieve a 5.1 faster performance at 8-threads than original one on an IBM Power 5+ machine that is equipped with 8-cores, and (2) hazards are caused by thread contentions over globally shared data, and as well as thread private data, and (3) AI driven players are represented very similarly to Human players inside ioquake3 engine, which gives an estimation of the costs for parallelizing Human driven sessions, and (4) 70% of the costs of the experiment is spent in analyzing

关键词： component Video Games Quake ioquake3 parallel computing parallelizing compilers OSCAR

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Towards Efficient Support for parallel I/O in Java HPC

Towards Efficient Support for Parallel I/O in Java HPC

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IEEE international conference on parallel and distributed computing, applications and technologies (PDCAT)

作者： Ammar Ahmad Awan Muhammad Sohaib Ayub Aamir Shafi Sungyoung Lee Department of Computer Engineering Kyung Hee University South Korea SEECS National University of Science and Technology Pakistan

ISBN: (纸本)9781467357043

Modern HPC applications put forward significant I/O requirements. To deal with them, MPI provides the MPI-IO API for parallel file access. ROMIO library implements MPI-IO and provides efficient support for parallel I/O in C and Fortran based applications. On the other hand, Java based MPI-like libraries such as MPJ Express and F-MPJ have emerged but they lack parallel I/O support. Little research has been done to provide Java based ROMIO-like libraries due to the non-availability of MPI-IO-like API for the Java language. In this paper, we take the first step towards the development of parallel I/O API in Java by evaluating the newly introduced Java NIO API versus the legacy Java I/O API. We propose two simple approaches for performing parallel file I/O using NIO and evaluate them on two different computational platforms. the implementation of proposed approaches exploits the view buffers concept of NIO API to perform efficient array based file I/O operations from multiple processes. We report encouraging speedups and suggest that design of a parallel I/O API in Java should be based on the NIO API.

关键词： Java Arrays File systems Libraries Bandwidth Writing Instruction sets

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parallel Implementation of LBP Based Face Recognition on GPU Using OpenCL

Parallel Implementation of LBP Based Face Recognition on GPU...

引用

IEEE international conference on parallel and distributed computing, applications and technologies (PDCAT)

作者： C.Y.N. Dwith G.N. Rathna Department of Electronics and Communication Engineering National Institute of Technology Warangal India Department of Electrical Engineering Indian Institute of Science Bangalore India

In this paper, we implement a novel parallelized approach of Local Binary Pattern (LBP) based face recognition algorithm on GPU. High performance rates have been achieved through maximizing the resource exploitation available in the GPU. the launch of GPU programming tools like Open source Computation Language (OpenCL) and (CUDA) have boosted the development of various applications on GPU. In this paper we implement a parallelized LBP algorithm on GPU using OpenCL programming tools. Programs developed under the OpenCL enable us to utilize GPU for general purpose computation with increased performance efficiency in terms of execution time. the experimental results based on the implementation on AMD 6500 GPU processor are observed to increase the computational performance of the system by to 30 folds in case of 1024×1024 images. the relative computational efficiency increases with increase in the size of the Image. this paper addresses several parallelization problems related to memory access and updating, divergent execution paths, understanding and realizing the OpenCL's concurrency and Execution models.

关键词： Graphics processing units Histograms Face recognition Face Vectors Computational modeling Algorithm design and analysis

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Hierarchical and distributed implementation of synchronization and coordination for discrete event multiple robot systems

Hierarchical and distributed implementation of synchronizati...

引用

IEEE/ASME international conference on Mechtronic and Embedded Systems and applications, MESA

作者： Gen'ichi Yasuda Department of Human and Computer Intelligence Nagasaki Institute of Applied Science Nagasaki Japan

Since in the large and complex robotic systems such as multiple robot systems, the real robot controllers are spatially distributed according to their physical structure, it is desirable to realize the hierarchical and distributed control with a suitable parallel processing architecture. Hierarchical Petri net modeling is seemingly well suited for structured and predictable environments such as robotic manufacturing systems. the paper presents a discrete event net based distributed control architecture for multiple robot coordination. According to the parallelism among the robotic tasks in the system, the advantage of the parallel and distributed architecture of the control system will be taken to reach the high performance control capabilities.

关键词： Robot kinematics Firing Machining System recovery Loading Computer architecture

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A parallel pipelined approach to Vedic multiplier for FPGA implementation 4

A parallel pipelined approach to Vedic multiplier for FPGA i...

引用

4th international conference on Advances in Recent technologies in Communication and computing, ARTCom 2012

作者： Dixit, Harish V. Kasat, Piyush S. Balwaik, Rahul Jeyakumar, Amutha V.C.E.T Vasai India V.J.T.I Matunga India

ISBN: (纸本)9781849199292

As Technology progresses, the speed of a digital system is of prime importance. Most complex system use multipliers, and most often than not it is these multipliers which limit the speed of the system. Many high speed multipliers have been proposed in the past. Multipliers based on Vedic mathematics being one of them. Vedic multiplication algorithm is found to be fast as compared to other multiplication algorithms like Booth or Wallace. However the Vedic multiplier suffers from propagation delay for longer input lengths. A novel pipelined approach, consisting of seven stages is proposed here, so as to reduce the propagation delay. An 8∗11 bit pipelined Vedic multiplier to be used for DCT applications is proposed and implemented. It is found to have a maximum clock speed of 179.69 MHz, and an area consisting of 225 slices.

关键词： Field programmable gate arrays (FPGA)

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Designing a federated testbed as a distributed system

Designing a federated testbed as a distributed system

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8th international ICST conference on Testbeds and Research Infrastructures: Development of Networks and Communities, TridentCom 2012

作者： Ricci, Robert Duerig, Jonathon Stoller, Leigh Wong, Gary Chikkulapelly, Srikanth Seok, Woojin University of Utah School of Computing United States Korea Institute of Science and Technology Information Korea Republic of

ISBN: (纸本)9783642355752

Traditionally, testbeds for networking and systems research have been stand-alone facilities: each is owned and operated by a single administrative entity, and is intended to be used independently of other testbeds. However, this isolated facility model is at odds with researchers' ever-increasing needs for experiments at larger scale and with a broader diversity of network technologies. the research community will be much better served by a federated model. In this model, each federated testbed maintains its own autonomy and unique strengths, but all federates work together to make their resources available under a common framework. Our challenge, then, is to design a federated testbed framework that balances competing needs: We must establish trust, but at the same time maintain the autonomy of each federated facility. While providing a unified interface to a broad set of resources, we need to expose the diversity that makes them valuable. Finally, our federation should work smoothly in a coordinated fashion, but avoid central points of failure and inter-facility dependencies. We argue that treating testbed design as a federated distributed systems problem is an effective approach to achieving this balance. the technique is illustrated through the example of ProtoGENI, a system we have designed, built, and operated according to the federated model. © 2012 ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering.

关键词： Testbeds

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A unified monitoring framework for distributed information system management

A unified monitoring framework for distributed information s...

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international Joint conference on INC, IMS and IDC, NCM

作者： Shiping Chen Surya Nepal Suraj Pandey Information Engineering Laboratory CSIRO ICT Centre Marsfield NSW Australia

With the increasing complexity and scale of business processes, and the underlying information systems, there is a demand for monitoring the complicated business processes spanning multiple enterprise information systems distributed in a heterogeneous IT environment. this paper presents a unified monitoring framework for such distributed information system management. this framework utilizes Web service and messaging queue technologies to collect log data for business process visualization and monitoring and decouples the tight links between the monitoring tool and the components to be monitored. XML is used to define a universal data format for different types of information to be monitored. A prototype tool is implemented and presented to demonstrate the feasibility and usability of the proposed framework, and experiments are conducted to evaluate the performance overhead introduced by the monitoring.

关键词： Monitoring Visualization XML Computers Business Irrigation Simple object access protocol

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