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International Symposium on parallel and distributed processing (IPDPS)

作者： Seongsoo Hong Jaesoo Lee Hyeonsang Eom Gwangil Jeon Real-Time Operation Systems Laboratory School of Electrical Engineering and Computer Science Seoul National University of Technology Seoul South Korea Distributed Information Processing Laboratory School of Computer Science and Computer Engineering Seoul National University of Technology Seoul South Korea Department of Computer Engineering Korea Polytechnic University Siheung Gyeonggi South Korea

ISBN: (纸本)9781424400546

In this paper, we present a robot middleware technology named robot software communications architecture (RSCA) for its use in networked home service robots. The RSCA provides a standard operating environment for the robot applications together with a framework that expedites the development of such applications. The operating environment is comprised of a real-time operating system, a communication middleware, and a deployment middleware. Particularly, the deployment middleware supports the reconfiguration of component-based robot applications including installation, creation, start, stop, tear-down, and un-installation. In designing RSCA, we have adopted a middleware called SCA from the software defined radio domain and extend it since the original SCA lacks the real-time guarantees and appropriate event services. We have fully implemented RSCA and performed measurements to quantify its run-time performance. Our implementation clearly shows the viability of RSCA

关键词： Embedded software Computer architecture Middleware Service robots Application software Standards development Real time systems Operating systems Software radio Performance evaluation

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Performance Evaluation of Different Data Value Prediction Schemes

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Journal of Computer science & technology 2005年第5期20卷 615-623页

作者： Yong Xiao Xing-Ming Zhou National Laboratory for Parallel and Distributed Processing National University of Defense Technology Changsha 410073 P.R. China

Data value prediction has been widely accepted as an effective mechanism to break data hazards for high performance processor design. Several works have reported promising performance potential. However, there is hardly enough information that is presented in a clear way about performance comparison of these prediction mechanisms. This paper investigates the performance impact of four previously proposed value predictors, namely last value predictor, stride value predictor, two-level value predictor and hybrid （stride-t-two-level） predictor. The impact of misprediction penalty, which has been frequently ignored, is discussed in detail. Several other implementation issues, including instruction window size, issue width and branch predictor are also addressed and simulated. Simulation results indicate that data value predictors act differently under different configurations. In some cases, simpler schemes may be more beneficial than complicated ones. In some particular cases, value prediction may have negative impact on performance.

关键词： data value predictors performance impact simulation

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Performance evaluation of data value prediction schemes

Performance evaluation of data value prediction schemes

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作者： Xiao, Yong Zhou, Xing-Ming National Laboratory for Parallel and Distributed Processing National University of Defense Technology Changsha 410073 China Chinese Academy of Science

Data value prediction has been widely accepted as an effective mechanism to break data hazards for high performance processor design. Several works have reported promising performance potential. However, there is hardly enough information that is presented in a clear way about performance comparison of these prediction mechanisms. This paper investigates the performance impact of four previously proposed value predictors, namely last value predictor, stride value predictor, two-level value predictor and hybrid (stride+two-level) predictor. The impact of misprediction penalty, which has been frequently ignored, is discussed in detail. Several other implementation issues, including instruction window size, issue width and branch predictor are also addressed and simulated. Simulation results indicate that data value predictors act differently under different configurations. In some cases, simpler schemes may be more beneficial than complicated ones. In some particular cases, value prediction may have negative impact on performance. © 2005 Springer science + Business Media, Inc.

关键词： Data processing

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A prediction-based parallel replication algorithm in distributed storage system

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4th International Conference on Grid and Cooperative Computing - GCC 2005

作者： Wang, Yijie Zhang, Xiaoming National Laboratory for Parallel and Distributed Processing Institute of Computer National University of Defense Technology Changsha 410073 China

ISBN: (纸本)3540305106

Data replication can be used to reduce bandwidth consumption and access latency in the distributed system where users require remote access to large data objects. In this paper, according to the intrinsic characteristic of distributed storage system, the prediction-based parallel replication algorithm PPR is proposed. In the PPR, according to the characteristic of spatial data, the data that will be accessed is predicted, then the data is prefetched;during replication, according to the network state, several replicas of a data object are selected, which are of the least access cost;the different parts of the data object are transferred from these replicas, and they are used to make a new replica. The results of performance evaluation show that the PPR can utilize the network bandwidth efficiently, provide high data replication efficiency and substantially better access efficiency, and can avoid the interference between different replications efficiently. © Springer-Verlag Berlin Heidelberg 2005.

关键词： distributed computer systems

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Model transformation based verification of Web services composition

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4th International Conference on Grid and Cooperative Computing - GCC 2005

作者： Yang, YanPing Tan, QingPing Xiao, Yong School of Computer Science National University of Defense Technology Changsha 410073 China National Lab. of Parallel Distributed Processing Changsha 410073 China

ISBN: (纸本)3540305106

Current Web services composition proposals, such as BPEL, BPSS, BPMN and WSCI, provide notations for describing the control and message flows in Web service collaborations. However, such proposals remain at the descriptive level, without providing any kind of mechanisms or tool support for verifying the composition specified in the proposed notations. In this paper, we present to analyze and verify Web services composition by using CP-nets. CP-nets combine the strengths of Petri nets with the expressive power of high-level programming and have sound mathematical semantics. These services composition proposals can be transformed by model transformation rules into CP-nets, which can be used to analyze the performance and to investigate behavioral properties by CP-nets specialized tools. © Springer-Verlag Berlin Heidelberg 2005.

关键词： World Wide Web

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Design issues of a novel toolkit for parallel application performance monitoring and analysis in cluster and grid environments

Design issues of a novel toolkit for parallel application pe...

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8th International Symposium on parallel Architectures, Algorithms and Networks, I-SPAN 2005

作者： Li, Kuan-Ching Wang, Hsiao-Hsi Chen, Chiou-Nan Liu, Chun-Chieh Chang, Chia-Fu Hsu, Chia-Wen Hung, Sheng-Shiang Parallel and Distributed Processing Center Department of Computer Science and Information Management Providence University Shalu Taichung 43301 Taiwan Laboratory of Bioinformatics and Computational Biology Department of Computer Science National Tsing Hua University Hsinchu 30013 Taiwan

ISBN: (纸本)0769525091

The low-cost and availability of network of workstations have made them attractive solution for high performance computing. Striking progress of network technology is enabling high-performance global computing, with the utilization of cluster and grid technologies, in which computational and data resources in a local or wide area network are transparently employed to solve large-scale problems. In this paper, we present implementation and design rationale of Visuel* toolkit for performance measurement and analysis of parallel applications in cluster and grid environments. Most of performance visualization tools available today for high-performance platforms show solely system performance data (e.g., CPU load, memory usage, network bandwidth, server average load), and thus, being suitable for visualization of computing platform system activities. The Visuel toolkit is web-based interface designed to show performance, activities of all computing nodes of a cluster or grid computing platform involved in the execution of a parallel application, such as CPU load level and memory usage of each computing node. In addition, this toolkit is able to display comparative performance data visualizations generated from a number of executions of an application under investigation, analyzing the performance of different implementations. Evaluations using this toolkit show that it outperforms in easing the process of investigation and implementation of parallel applications, in effective way. © 2005 IEEE.

关键词： Computer workstations

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Decision tree construction for data mining on grid computing environments

Decision tree construction for data mining on grid computing...

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19th International Conference on Advanced Information Networking and Applications, AINA 2005

作者： Yang, Chao-Tung Tsai, Shu-Tzu Li, Kuan-Ching High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung City 40704 Taiwan Parallel and Distributed Processing Center Department of Computer Science and Information Management Providence University Taichung County 43301 Taiwan

ISBN: (纸本)0769522491

In this paper, we present our Grid-based decision tree architecture, with the intention of applying it to both parallel and sequential algorithms. Also, we show that, based on the scope and model of data mining applied in the Grid environment as well as user equivalent perspective, Grid roles can be categorized into three types. It is our goal, through these definitions, to help software developers define clear system processes and differentiate the application scope for software applications. To, fulfill our architecture, we first apply an existing parallel decision tree algorithm (the SPRINT algorithm) to the Grid environment. The performance and differences in many other areas are compared using datasets of different sizes. The experimental results will be used for future reference and further development. © 2005 IEEE.

关键词： Data mining

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An enhanced parallel loop self-scheduling scheme for cluster environments

An enhanced parallel loop self-scheduling scheme for cluster...

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19th International Conference on Advanced Information Networking and Applications, AINA 2005

作者： Yang, Chao-Tung Cheng, Kuan-Wei Li, Kuan-Ching High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung City 40704 Taiwan Parallel and Distributed Processing Center Department of Computer Science and Information Management Providence University Taichung County 43301 Taiwan

ISBN: (纸本)0769522491

In this paper, a parallel loop self-scheduling scheme for heterogeneous PC cluster systems is proposed. Though the proposed scheme does allow users to choose parameters before the execution initialization phase, there are still weaknesses that motivate us to go further with new improvements in that scheme. For instance, a decision on a fixed and monotonous parameter can easily lead to invalid schedule by using previous input information. Thus, it is proposed in this paper a new scheme, where the scheduling parameter can be adjusted dynamically and fit into most widely available computer systems, in order to provide higher overall performance. © 2005 IEEE.

关键词： Scheduling

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A high-performance computational resource broker for Grid Computing environments

A high-performance computational resource broker for Grid Co...

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19th International Conference on Advanced Information Networking and Applications, AINA 2005

作者： Yang, Chao-Tung Shih, Po-Chi Li, Kuan-Ching High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung City 40704 Taiwan Parallel and Distributed Processing Center Department of Computer Science and Information Management Providence University Taichung County 43301 Taiwan

ISBN: (纸本)0769522491

Internet computing and grid technologies promise to change the way we tackle complex problems. They will enable large-scale aggregation and sharing of computational, data and other resources across institutional boundaries. As Grid Computing is becoming a reality, there is a need for managing and monitoring the available resources worldwide, ax well as the need for conveying these resources to the everyday user. This paper describes a resource broker with its main function as to match the available resources to the user's needs. The use of the resource broker provides a uniform interface to access any of the available and appropriate resources using user's credentials. The resource broker runs on top of the Globus Toolkit. Therefore, it provides security and current information about the available resources and serves as a link to the diverse systems available in the Grid. © 2005 IEEE.

关键词： Computer systems

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On implementation of an enhanced and integrated parallel programming web-based toolkit

On implementation of an enhanced and integrated parallel pro...

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ITRE 2005 - 3rd International Conference on Information technology: Research and Education

作者： Li, Kuan-Ching Yang, Chao-Tung Parallel and Distributed Processing Center Dept. of Computer Science and Information Management Providence University Shalu Taichung 43301 Taiwan High Performance Computing Laboratory Dept. of Computer Science and Information Engineering Tunghai University Taichung City Taichung 40704 Taiwan

ISBN: (纸本)0780389328

The computing power provided by high performance and low cost PC-based clusters and Grid computing platforms are attractive and they are equal or superior to supercomputers and mainframes. In parallel, discussions on how to obtain more computing power from these computing platforms become an interesting issue. The development of applications for these high-performance computing platforms is complicated for several reasons: The complexity of applications themselves, which combines aspects of supercomputing and distributed computing, and by the need to achieve higher performance. This paper describes the design rationale and implementation of a parallel programming web-based toolkit, to ease the parallel programming learning process, with the use of web-based interface. The toolkit has widely been used in MPI parallel programming courses (both in graduate and undergraduate levels) and industry trainings. © 2005 IEEE.

关键词： Computer programming

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