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检索条件"任意字段=10th International Conference on Algorithms and Architectures for Parallel Processing"

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Evaluation of global synchronization for iterative algebra algorithms on many-core

Evaluation of global synchronization for iterative algebra a...

引用

ACIS international conference on Software Engineering, Artificial Intelligence, Networking, and parallel/Distributed Computing (SNPD)

作者： Ayaz ul Hasan Khan Mayez Al-Mouhamed Lutfi A. Firdaus Department of Computer Engineering College of Computer Science & Engineering Dhahran Saudi Arabia

Massively parallel computing is applied extensively in various scientific and engineering domains. With the growing interest in many-core architectures and due to the lack of explicit support for inter-block synchronization specifically in GPUs, synchronization becomes necessary to minimize inter-block communication time. In this paper, we have proposed two new inter-block synchronization techniques: 1) Relaxed Synchronization, and 2) Block-Query Synchronization. these schemes are used in implementing numerical iterative solvers where computation/communication overlapping is one used optimization to enhance application performance. We have evaluated and analyzed the performance of the proposed synchronization techniques using Jacobi Iterative Solver in comparison to the state of the art inter-block lock-free synchronization techniques. We have achieved about 1-8% performance improvement in terms of execution time over lock-free synchronization depending on the problem size and the number of thread blocks. We have also evaluated the proposed algorithm on GPU and MIC architectures and obtained about 8-26% performance improvement over the barrier synchronization available in OpenMP programming environment depending on the problem size and number of cores used.

关键词： Synchronization Graphics processing units Jacobian matrices Instruction sets Kernel Computer architecture Microwave integrated circuits

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Performance evaluation of novel optical-wireless variable N-parallel code-shift-keying

Performance evaluation of novel optical-wireless variable N-...

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international conference on Signal processing and Communication Systems, ICSPCS

作者： Keisuke Osawa Hiromasa Habuchi Yusuke Kozawa Ibaraki University Japan Tokyo University of Science Japan

ISBN: (纸本)9781509009428

the indoor visible light communications have mainly the two serious problems; the bit error rate (BER) deterioration due to interference from ambient light and change of the data transmission efficiency according to dimming level. To settle the above problems, in this paper, the variable N-parallel code-shift-keying (VN-CSK) system with modified prime sequence codes (MPSC) for indoor visible light communications is considered. the VN-CSK system with MPSC achieves the same transmission efficiency by changing the number of the codes to select from M MPSCs depending on light regulation data. For example, if the number of MPSC is 5, the VN-CSK system with MPSC can realize 4 stages of dimming level. Moreover, the VN-CSK system with MPSC can suppress the influence of co-channel interference by using the group characteristics of MPSC. the bit error rate performance of the VN-CSK system with MPSC is evaluated in optical wireless channel by theoretical analysis. the VN-CSK system with MPSC can realize BER 10 -6 when average received optical power per code is -49 [dBm] and the desired signal to interference signal ratio P w /P i ≥ 3 [dB].

关键词： Bit error rate Data communication Light emitting diodes Avalanche photodiodes Adaptive optics Interchannel interference Optical receivers

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Design and implementation of DMA transfers in WISHBONE interface

Design and implementation of DMA transfers in WISHBONE inter...

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international conference on Communications and Networking in China (CHINACOM)

作者： Lei Lei Jun Wu Tong Sun Songlin Cheng Xin Chen College of Electronic and Information Engineering Tongji University Shanghai China

ISBN: (纸本)9781479987962

the Digital Signal Processor (DSP) is a specialized microprocessor, with its architecture optimized for the operational needs of digital signal *** often uses special memory architectures that are able to fetch multiple data and/or instructions at the same *** applying to WISHBONE bus interface it is much easier to connect the cores, and therefore much easier to create a custom System on Chip (SOC) such as the *** order to increase the data transaction from DSP core to WISHBONE Slave module, this paper proposes a special Direct Memory Access (DMA) which supports a three-ports interface of data transaction. this DMA also offers burst mode and the address list mode of data transaction which can speed the data transmission and make it more flexible. In the process of the design and implement, a synchronization of asynchronous clock issue needs to be solved. the final implementations have been done in ASIC. the functionality of the design is synthesized using Design Compiler and placement and routing by IC compiler.

关键词： Digital signal processing Clocks Registers Synchronization Computer architecture Data communication Delays

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A parallel search genetic algorithm based on multiple peak values and multiple rules

A parallel search genetic algorithm based on multiple peak v...

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10th international Manufacturing conference in China (IMCC 2002)

作者： Guo, LX Zhao, MY Chinese Acad Sci Shenyang Inst Automat Shenyang 110016 Peoples R China

In this paper, Hamming distance is used to control individual difference in the process of creating an original population, and a peak-depot is established to preserve information of different peak-points. Some new methods are also put forward to improve the optimization performance of a genetic algorithm (GA), such as the point-cast method and the neighborhood search strategy around peak-points. the methods, are used to deal with genetic operation as well as cross-over and mutation, in order to obtain a global optimum solution and avoid the GAs premature convergence. By means of many control rules and a peak-depot, the new algorithm carries out an optimum search surrounding several peak-points. Along with the evolution of individuals of the population, the fitness of peak-points of peak-depot increases continually, and a global optimum solution can be obtained. the new algorithm searches around several peak-points, which increases the probability of obtaining the best global optimum solution. the results of some examples to test the modified GA indicate that what has been done makes the modified genetic algorithm effective in solving both linear optimization problems and non-linear optimization problems with restrictive functions. (C) 2002 Elsevier Science B.V. All rights reserved.

关键词： genetic algorithm peak-depot individual difference control point-cast method multi-peak search

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A Tool for Real-Time Performance Monitoring of parallel and Distributed Systems

A Tool for Real-Time Performance Monitoring of Parallel and ...

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IEEE Region 10 international conference TENCON

作者： D. Bhatt T. Steeves D. Lee Honeywell Systems and Research Center Inc. Minneapolis MN USA

this paper presents the concepts, architecture, and features of a tool for instrumenting parallel and distributed systems. this capability will be useful in evaluating alternative architectures and strategies for distributing application software, detecting performance bottlenecks, quantifying and fine-tuning real-time performance, detecting and isolating behavior anomalies, and characterizing the behavior of specific algorithms under desired stimulation conditions. the Honeywell instrumentation system provides a flexible capability for selecting and customizing existing instrumentation functions, synthesizing new instrumentation functions, and tailoring/scaling instrumentation to a particular architecture or application domain.

关键词： Real time systems Monitoring Instruments Computer architecture Application software Hardware Performance analysis Debugging Distributed processing Algorithm design and analysis

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Deployment Method of Virtual Machine Cluster Based on Energy Minimization and Graph Cuts theory

Deployment Method of Virtual Machine Cluster Based on Energy...

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international conference on P2P, parallel, Grid, Cloud and Internet Computing (3PGCIC)

作者： Zhiping Peng Bo Xu Delong Cui Weiwei Lin XuAn Wang Department of Computer Science and Technology Guangdong University of Petrochemical Technology Maominig China School of Computer Science and Engineering South China University of Technology Guangzhou China Engineering University of Chinese Armed Police Force Xi'an China

ISBN: (纸本)9781467394741

A deployment method had been constructed for virtual machine cluster based on energy minimization and graph cut theory. First, virtual machine cluster was described by energy minimization. Second, deployment of virtual machine cluster was changed into maximum flow minimum cut problem. thirdly, sink and source point was added and activity node was found. Finally, activity tail-nodes were connected and cut formed for virtual machine cluster. Experimental results show that the proposed method can effectively cut virtual machine cluster and select rationally physical host for sub-cluster.

关键词： Virtual machining Minimization Cloud computing Bandwidth Hardware Virtualization Central processing Unit

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international conference on P2P, parallel, Grid, Cloud and Internet Computing (3PGCIC)

作者： Minami Suzuki Shu Li Toshiya Iiba Kosuke Takano Department of Computer and Information Sciences Kanagawa Institute of Technology Atsugi Kanagawa Japan

ISBN: (纸本)9781467394741

Many stores are introducing tools for customer self-service, such as product searches and store navigation. Using mobile devices, such as the customers' smartphones and tablets, services of this kind can be enhanced to allow a customer to obtain product and store information more quickly. In such an environment, a history of customer queries can be stored daily in a database system maintained by the store. To improve customer convenience and sales at a store, it is desirable to extract a customer's potential requests in a store by analyzing the customer's queries. In this study, we present a method of extracting a set of related items from a customer's point of view by analyzing the customer's queries in a store. From experiments using our prototype, we confirm that our proposed method can extract related-item candidates displayed on different shelves.

关键词： Data mining Cloud computing Database systems Layout Data visualization Data processing

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parallel Best Neighborhood Matching Algorithm Implementation on GPU Platform

Parallel Best Neighborhood Matching Algorithm Implementation...

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international conference on Computer and Information Technology (CIT)

作者： Guangyong Zhang Liqiang He Yanyan Zhang College of Computer Science Inner Mongolia University for the Nationalities Huhhot Inner Mongolia China

Error concealment restores the visual integrity of image content that has been damaged due to a bad network transmission. Best neighborhood matching (BNM) is an effective image recovery method that exploits the information redundancy in a block-coded broken image to find similar content which it then uses to repair or conceal errors. On a high definition image BNM is traditionally implemented sequentially, which requires a relatively long time and so is not suitable for real-time or high volume use. In this paper, we analyze the data access patterns of the BNM algorithm, and exploit a GPU platform to speedup the execution through a parallel implementation. We compare and combine several different GPU optimization methods (coalesced global memory access, shared memory, register files, etc.), and propose an improvement to the parallel BNM algorithm. Experiment results show that our approach can speed up BNM twenty-one times over the sequential approach without any obvious loss of accuracy.

关键词： Instruction sets Graphics processing unit Registers Pixel Image restoration PSNR Marine animals

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H.264 parallel Decoder at HD Resolution on a Coarse-grained Reconfigurable Multi-media System

H.264 Parallel Decoder at HD Resolution on a Coarse-grained ...

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2010 10th IEEE international conference on Solid-State and Integrated Circuit Technology(第十届固态和集成电路技术国际会议 ICSICT-2010)

作者： Wenjie Wang Leibo Liu Shouyi Yin Min Zhu Yansheng Wang Shaojun Wei Research Center for Mobile Computing Tsinghua University Institute of Microelectronics Tsinghua University Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China

ISBN: (纸本)9781424457977

REconfigurable MUlti-media System (REMUS) is a new coarse-grained reconfigurable processor. this paper describes the parallel implementation of H.264 decoding algorithm on REMUS. First, the pipelined parallel decoding technique is introduced to loosen the strict constraint of real-time decoding. Second, the most computing intensive tasks, such as Motion Compensation (MC), Deblocking and Inverse Discrete Cosine Transform (IDCT), are mapped onto the reconfigurable processing Element Array (PEA), while the other control-intensive tasks are carried out by the host processor. Simulation shows that based on proposed approaches, REMUS can support H.264 HighProfile (HiP) Level 4 1920xl080@30fps streams at 200 MHz.

关键词： configurability inverse discrete cosine transform MULTI-MEDIA SYSTEM DECODING parallel Lines decoders host processor

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Evaluating the Soft Error Resilience of Graph Applications on GPGPUs

Evaluating the Soft Error Resilience of Graph Applications o...

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IEEE international conference on Big Data Security on Cloud (BigDataSecurity), High Performance and Smart Computing (HPSC) and Intelligent Data and Security (IDS)

作者： Xiaohui Wei Mengting Zhou Nan Jiang Hengshan Yue College of Computer Science and Technology Jilin University Changchun China

ISBN: (数字)9798350389524

ISBN: (纸本)9798350389531

General-Purpose Graphics processing Units (GPGPUs) are widely utilized for graph processing thanks to their high throughput, massive parallelism and powerful computing capacity. However, due to the increasing integration, GPGPUs are susceptible to soft errors, which can undermine the reliability of graph applications accelerated using GPGPUs. Typically, fault tolerance strategies such as thread replication and checkpoint mechanism are applied to ensure the reliability of program execution. However, these techniques require appropriate trade-off between reliability improvement and overhead. To this end, it is imperative to understand the error resilience profile of graph applications. In this paper, we construct a multidimensional analysis framework, which analyzes the error resilience of graph applications on GPGPUs from application, kernel function, and thread perspective. Based on the exhaustive statistical fault injection (FI) results for four graph algorithms, we propose heuristic suggestions as guidance for efficient fault tolerance strategies.

关键词： Fault tolerance Instruction sets Heuristic algorithms Fault tolerant systems Graphics processing units parallel processing throughput

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