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检索条件"任意字段=2011 4th International Symposium on Parallel Architectures, Algorithms and Programming, PAAP 2011"

共 29 条记录，以下是11-20 订阅

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thread-level parallel algorithm for sorting integer sequence on multi-core computers

Thread-level parallel algorithm for sorting integer sequence...

引用

2011 4th international symposium on parallel architectures, algorithms and programming, paap 2011

作者： Cheng, Zhong Qi, Ke Liu, Jun Huang, Yi-Ran School of Computer and Electronics and Information Guangxi University Nanning Guangxi 530004 China School of Information and Statistics Guangxi University for Finance and Economics Nanning Guangxi 530004 China

ISBN: (纸本)9780769545752

According to the characteristics of multi-core architectures and binary storage property of integer sequence, this paper proposes an efficient thread-level parallel algorithm for sorting integer sequence on multi-core computers. the algorithm divides the input integer sequence to several data blocks in main memory and distributes these blocks into the shared L2 cache and private L1 cache respectively, implements dynamically load balance among the processing cores, and utilizes data-level parallel SIMD instructions and thread-binding technique to speed up the sorting procedure. Experiment results show that the algorithm can obtain high speedup and good scalability, and its execution efficiency will not be affected by the data distribution of input integer sequence. © 2011 IEEE.

关键词： parallel algorithms

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A test sequence selection method for parallel software systems

A test sequence selection method for parallel software syste...

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2011 4th international symposium on parallel architectures, algorithms and programming, paap 2011

作者： Sun, Tao Ye, Xinming Liu, Jing College of Computer Science Inner Mongolia University Hohhot China

ISBN: (纸本)9780769545752

Modeling and testing for a parallel software system is very difficult, because parallel behaviors leads to system state explosion. Many testing methods are testing with a large number of redundancies. In this paper, a test sequence selection method for parallel software systems is shown. the method is based on linear behavior sequences which is preparing for testing, called LBSPT. Firstly, a formal model for software system specification is constructed based on Coloured Petri Net (CPN), called system model, and LBSPT is also modeled based on CPN, called LBSPT model. A test sequence selection method is defined on these models. the method could select all of test sequences related to LBSPT, and does not contain any redundancy. the state explode problem in software testing is solved to a certain extent. Practices show that the effect of this method is better than other methods such as random walk. © 2011 IEEE.

关键词： Redundancy

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the design and implementation of OMPit: An OpenMP compiler characterized by logs for parallel and work-sharing

The design and implementation of OMPit: An OpenMP compiler c...

引用

2011 4th international symposium on parallel architectures, algorithms and programming, paap 2011

作者： Luo, Qiuming Cai, Ye Liu, Chengjian Kong, Chang College of Computer Science and Software Engineering Shenzhen University China

ISBN: (纸本)9780769545752

there are many tools for OpenMP benchmarking which measure the various aspects of the performance, such as the overheads of OpenMP directives and the characteristics of the whole system. But we lack some tools to show us the work-sharing details when the OpenMP program finished running. the OMPit (OMPi for tutoring) is designed to provide the work-sharing information during the running, which can be used for tutoring and might help debugging or tuning. the work-sharing logging includes the work assignment and the timestamps for three different work-sharing behaviors. the logging information can be output as a text files or visualized figures. the designing of OMPit is provided and the details of how to inserting the logging code into the OMPi compiler is discussed too. © 2011 IEEE.

关键词： Benchmarking

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A parallel PCG solver for large-scale groundwater flow simulation based on OpenMP

A parallel PCG solver for large-scale groundwater flow simul...

引用

2011 4th international symposium on parallel architectures, algorithms and programming, paap 2011

作者： Li, Dandan Ji, Xiaohui Wang, Qun Beijing China

ISBN: (纸本)9780769545752

Groundwater flow simulation has become one of the top international issues in new generation of environmental applications. When managing large-scale groundwater flow problems, the intensive computational ability and large amounts of memory space required for modeling are the main bottlenecks for researchers. In order to solve three-dimensional large-scale groundwater flow problems more rapidly, the OpenMP was adopted to parallelize the preconditioned conjugate gradient (PCG) algorithm in this paper. And this paper carried out a numerical experiment of the three-dimensional groundwater flow model on a computer with four cores. Based on the numerical experiment, it is found that the execution time of the original serial PCG program is about 1.74 to 2.86 times of the parallel PCG program executed with different number of threads. the experimental results also demonstrate that the PCG solver based on OpenMP is an effective way for solving large-scale three-dimensional groundwater flow problem. © 2011 IEEE.

关键词： Groundwater flow

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PCAR: parallelism based cache replacement scheme to exploit inter-disks parallelism and intra-disk spatial locality in parallel disk array

PCAR: Parallelism based cache replacement scheme to exploit ...

引用

2011 4th international symposium on parallel architectures, algorithms and programming, paap 2011

作者： Shi, Xiaodong Feng, Dan Computer College Huazhong University of Science and Technology Wuhan Hubei 430074 China Wuhan National Laboratory for Optoelectronics Wuhan Hubei 430074 China

ISBN: (纸本)9780769545752

For parallel disk array systems, the parallelism among disks is the key factor influencing the performance and the scale of systems. Unfortunately, the parallelism of cached blocks is largely ignored by cache management schemes that focus on reducing the number of cache misses. therefore, the performance of parallel disks array systems for workloads with a skew access pattern can be seriously degraded. To solve this problem, we propose a parallelism based Cache Replacement scheme (PCAR) for parallel disks array systems, which can exploit both of the inter-disks parallelism and the intra-disk spatial locality. We have implemented the prototype of PCAR algorithm in Linux 2.6.18. And, the experimental results show that PCAR outperforms DULO and LRU by up to 22.8% and 33.1% in terms of the average response time, and by up to 20% and 43.9% in terms of throughput. © 2011 IEEE.

关键词： Computer operating systems

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A parallel K-means clustering algorithm with MPI

A parallel K-means clustering algorithm with MPI

引用

2011 4th international symposium on parallel architectures, algorithms and programming, paap 2011

作者： Zhang, Jing Wu, Gongqing Hu, Xuegang Li, Shiying Hao, Shuilong School of Computer Science and Information Engineering Hefei University of Technology Hefei 230009 China

ISBN: (纸本)9780769545752

Clustering is one of the most popular methods for data analysis, which is prevalent in many disciplines such as image segmentation, bioinformatics, pattern recognition and statistics etc. the most popular and simplest clustering algorithm is K-means because of its easy implementation, simplicity, efficiency and empirical success. However, the real-world applications produce huge volumes of data, thus, how to efficiently handle of these data in an important mining task has been a challenging and significant issue. In addition, MPI (Message Passing Interface) as a programming model of message passing presents high performances, scalability and portability. Motivated by this, a parallel K-means clustering algorithm with MPI, called MKmeans, is proposed in this paper. the algorithm enables applying the clustering algorithm effectively in the parallel environment. Experimental study demonstrates that MKmeans is relatively stable and portable, and it performs with low overhead of time on large volumes of data sets. © 2011 IEEE.

关键词： Image segmentation

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parallel optimization of queries in XML dataset using GPU

Parallel optimization of queries in XML dataset using GPU

引用

2011 4th international symposium on parallel architectures, algorithms and programming, paap 2011

作者： Si, Xujie Yin, Airu Huang, Xiaocheng Yuan, Xiaojie Liu, Xiaoguang Wang, Gang College of Software Nankai University Tianjin 300071 China College of I.T. Nankai University Tianjin 300071 China

ISBN: (纸本)9780769545752

As XML is playing a crucial role in web services, databases, and document processing, efficient processing of XML queries has become an important issue. On the other hand, due to the increasing number of users, high throughput of XML queries is also required to execute tens of thousands of queries in a short time. Given the great success of GPGPU (General-Purpose computations on the Graphics Processors), we propose a parallel XML query model based on GPU, which mainly consists of two efficient task distribution strategies, to improve the efficiency and throughput of XML queries. We have developed a parallel simplified XPath language using Compute Unified Device Architecture (CUDA) on GPU, and evaluate our model on a recent NVIDIA GPU in comparison with its counterpart on eight-core CPU. the experiment results show that our model achieves both higher throughput and efficiency than CPU-based XML query. © 2011 IEEE.

关键词： Graphics processing unit

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A case study of the interplay between conflict management and version management in hardware Transactional Memory systems

A case study of the interplay between conflict management an...

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2011 4th international symposium on parallel architectures, algorithms and programming, paap 2011

作者： Yan, Zhichao Feng, Dan Tan, Yujuan Wuhan National Laboratory for Optoelectronics School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9780769545752

As one of the most potential solution to parallel programming on the future many-core platforms, Transactional Memory (TM) systems have attracted a great deal of attention from both the industry and academic since the first TM was proposed in 1993. Various design and implementation proposals have been proposed to improve the performance while reducing the overheads. Recent investigations of the high-contention and coarse-grained transactional workloads on TMs reveal various pathologies that will offset the performance benefits. In this paper, we analysis the advantages and disadvantages of the existing conflict management and version management schemes, make a case study in the interplay between conflict management and version management in hardware transactional memory systems, to learn its impact on performance and find some interesting appearance that can guide the future design. In particular, apply software runtime environment to support recognize application's dynamic behaviors and resolve transactional conflicts can obtain an average speedup of 11.7% across the 8 applications selected from the STAMP benchmark suite on DynTM, which is regarded as one of the most latest progress in hardware transactional memory systems. © 2011 IEEE.

关键词： parallel programming

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PAAG: A Polymorphic Array Architecture for Graphics and Image Processing

PAAG: A Polymorphic Array Architecture for Graphics and Imag...

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5th international symposium on parallel architectures, algorithms and programming (paap)

作者： Li, Tao Xiao, Lingzhi Huang, Hucai Han, Jungang XiAn Univ Posts & Telecom Res Ctr Telecom ASIC Design Xian Peoples R China XiAn Univ Posts & Telecom Sch Comp Sci Xian Peoples R China

ISBN: (纸本)9780769548982;9781467345668

A novel, polymorphic array architecture is proposed in this paper. this architecture is capable of supporting a dynamic mixture of data parallel computation (DLP), thread level parallel computation (TLP), and operation level parallel computation (OLP). We aim at designing a programmable architecture that can approach ASIC performance. this is accomplished through new architectural features and implementation level innovations. the architecture and its implementation are presented in the paper to demonstrate its feasibility and capabilities.

关键词： parallel computation polymorphic architecture data parallelism thread level parallelism operation level parallelism thread scheduling message routin.g

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Scheduling parallel Data Retrievals for Non-consecutive Broadcast in MIMO Wireless Networks

Scheduling Parallel Data Retrievals for Non-consecutive Broa...

引用

5th international symposium on parallel architectures, algorithms and programming (paap)

作者： He, Ping Shen, Hong Tian, Hui Beijing Jiaotong Univ Sch Comp & Informat Technol Beijing Peoples R China Univ Adelaide Sch Comp Sci Adelaide SA 5005 Australia Beijing Jiaotong Univ Sch Elect & Informat Engn Beijing Peoples R China

ISBN: (纸本)9780769548982;9781467345668

Wireless data broadcast is usually used to disseminate the public information to considerable clients in wireless environment. Based on the development of mobile device, some mobile devices can simultaneously use multiple antennae to process some operations. In this paper, we commit to study data retriveal schdeuling problem in wireless data broadcast, which mobile device has multiple antennae and the data items are non-consecutivly broadcasted in mutiple parallel channels. In order to improve the performance of downloading requested data items, we propose a scheme of scheduling parallel data retrievals for non-consecutive broadcast to decrease access latency and energy consumption. In this scheme, we utilize a weight of channel through two balancing factors to choose the suitable channel for data retrieval. We analyze the performance of propsed scheme and the other schemes. Evaluation results prove that the proposed scheme has the better performance.

关键词： parallel data retrieval wireless networks non-consecutive broadcast

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