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15th International Conference on parallel and distributed Systems, ICPADS '09

作者： Li, Dongsheng Chen, Yixin Huang, Feng National Lab. for Parallel and Distributed Processing College of Computer National University of Defense Technology Changsha City Hunan Province China

ISBN: (纸本)9780769539003

Virtual network is an important approach to support multiple legacy applications running unmodified in distributed virtual computing environments. A virtual networking approach called VirNet is proposed in this paper. VirNet can build multiple customized and isolated virtual networks simultaneously on the same physical hosts in the network, and it enables existing distributed applications written for LANs to run seamlessly on Internet. VirNet is designed completely in user space and requires no change to the kernel of operating systems. Experimental evaluation performed by a reference implementation shows that VirNet is efficient. The latency overhead caused by VirNet is very small and the bandwidth of VirNet is more than 85% of the available physical network bandwidth in both the LAN and emulated WAN environments. © 2009 IEEE.

关键词： Taps

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A Case Study on System-Level Modeling by Aspect-Oriented Programming

A Case Study on System-Level Modeling by Aspect-Oriented Pro...

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10th International Symposium on Quality Electronic Design

作者： Liu, Feng Mohamed, Otmane Ait Song, Xiaoyu Tan, Qingping National Lab of Parallel Distributed Processing Hunan China ECE department Concordia University Montreal QC Canada ECE department Portland State University Portland OR United States

ISBN: (纸本)9781424429523

The paper presents a novel and synergistic system-level modeling approach based on aspect-oriented programming (AOP) and SystemC. A case study on a 128-bit binary floating-point adder is performed to demonstrate the modeling strength of the approach. The validation experiment shows the effectiveness of the proposed approach. This work constitutes a first attempt to employ AOP in modeling digital systems.

关键词： System-Level Modeling AOP SystemC

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A Comparative Study of parallel Prefix Adders in FPGA Implementation of EAC

A Comparative Study of Parallel Prefix Adders in FPGA Implem...

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12th Euromicro Conference on Digital System Design, Architectures, Methods and Tools

作者： Liu, Feng Fariborz, F. F. Mohamed, Otmane Ait Chen, Gang Song, Xiaoyu Tan, Qingping National Lab. of Parallel Distributed Processing Hunan China ECE Department Concordia University Montreal QC Canada Lingcore Lab. Portland OR United States ECE Department Portland State University Portland OR United States

ISBN: (纸本)9780769537825

Several regular parallel trees have been proposed over the years to optimize logic depth, area, fan-out and interconnect count for logic circuits. In this paper, we propose a comparative study of different parallel prefix trees used in the design of a new end-around carry (EAC) adder targeting FPGA technology. This new adder is based on the fast 128-bit binary floating-point EAC adder which has been implemented in the IBM POWER6 microprocessor's fused multiply-add unit. The parallel prefix tree implemented on the IBM's EAC adder is a Kogge-Stone tree which has been chosen for its high performance and its low power consumption. Our comparative study highlights the main performance differences among fourteen different architecture configurations when targeting an FPGA EAC adder design. We focus on the area requirements and the critical path delay of these designs. Our experimental results show that there is one architecture configuration with the lower area requirement and the higher performance.

关键词： Adders

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Messages from the Program Co-chairs: NAS 2009

Proceedings - 2009 IEEE International Conference on Networki...

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Proceedings - 2009 IEEE International Conference on Networking, Architecture, and Storage, NAS 2009 2009年 xii页

作者： Zhu, Yifeng Fang, Liang Hu, Weiwu University of Maine United States National Lab of Parallel and Distributed Processing China Chinese Academy of Science China

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A Comparative Study of parallel Prefix Adders in FPGA Implementation of EAC

A Comparative Study of Parallel Prefix Adders in FPGA Implem...

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Euromicro Symposium on Digital System Design

作者： Feng Liu Fariborz Fereydouni Forouzandeh Otmane Ait Mohamed Gang Chen Xiaoyu Song Qingping Tan Parallel Distributed Processing National Laboratory Hunan China National Lab of Parallel Distributed processing Hunan China ECE department Concordia University Montreal Quebec Canada Lingcore Lab Portland OR USA ECE department Portland State University Portland OR USA

关键词： Field programmable gate arrays Adders Microprocessors distributed processing Logic circuits Delay Testing Digital systems Design methodology Design optimization

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Modelling with relational calculus of object and component systems - RCOS

Modelling with relational calculus of object and component s...

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作者： Chen, Zhenbang Hannousse, Abdel Hakim Van Hung, Dang Knoll, Istvan Li, Xiaoshan Liu, Zhiming Liu, Yang Nan, Qu Okika, Joseph C. Ravn, Anders P. Stolz, Volker Yang, Lu Zhan, Naijun International Institute for Software Technology United Nations University China Faculty of Science and Technology University of Macau Department of Computer Science Aalborg University Denmark Lab. of Computer Science Institute of Software CAS China National Laboratory for Parallel and Distributed Processing China

ISBN: (纸本)3540852883

This chapter presents a formalization of functional and behavioural requirements, and a refinement of requirements to a design for CoCoME using the Relational Calculus of Object and Component Systems (rCOS). We give a model of requirements based on an abstraction of the use cases described in Chapter 3.2. Then the refinement calculus of rCOS is used to derive design models corresponding to the top level designs of Chapter 3.4. We demonstrate how rCOS supports modelling different views and their relationships of the system and the separation of concerns in the development. © 2008 Springer-Verlag Berlin Heidelberg.

关键词： Calculations

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Message from the program co-chairs

Proceedings - Fifth International Conference on Grid and Coo...

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Proceedings - Fifth International Conference on Grid and Cooperative Computing, GCC 2006 2006年 12-12页

作者： Xiao, Wong Buyya, Rajkumar Liu, Yunhao National Laboratory for Parallel and Distributed Processing Changsha China GRIDS Lab. Dept. of Computer Science and Software Engineering University of Melbourne Australia Dept. of Computer Science Hong Kong University of Science and Technology Hong Kong Hong Kong

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Message from the program co-chairs

Proceedings - Fifth International Conference on Grid and Coo...

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Proceedings - Fifth International Conference on Grid and Cooperative Computing, GCC 2006 - Workshops 2006年 12-12页

作者： Nong, Xiao Buyya, Rajkumar Liu, Yunhao National Laboratory for Parallel and Distributed Processing Changsha China GRIDS Lab. Dept. of Computer Science and Software Engineering University of Melbourne Australia Dept. of Computer Science Hong Kong University of Science and Technology Hong Kong Hong Kong

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RIMP: Runtime IMplicit Predication

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6th International Workshop on Advanced parallel processing Technologies

作者： Tang, Y Deng, K Wang, XD Dou, Y Zhou, XM National Lab. for Parallel and Distributed Processing China

ISBN: (纸本)3540296395

If-conversion and predicated execution are widely adopted to eliminate branch misprediction penalty. Previous predication execution depends on compiler to generate explicit predicated instructions, In this paper, a trace-based predicate mechanism named RIMP (Runtime IMplicit Predication) is discussed. The candidates of if-conversion will be identified during dynamic execution. Conventional trace cache has been modified to store RIMP traces, which include instructions both from fall-through and target block following the conditional branch. Hardware extension will add predication to RIMP trace automatically. With the help of RIMP, legacy applications can benefit from predication mechanism without recompiling source code. Simulation of RIMP implementation under diverse microarchitecture configurations is presented in the paper. Results have shown promising performance improvement. In general, RIMP with 64kB trace storage delivers an average 10.3% IPC improvement while actually speeding up the execution time by over 7%.

关键词： predication trace cache runtime execution RIMP

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Strategy of transcription analysis for alternative splicing research

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Guofang Keji Daxue Xuebao/Journal of national University of Defense Technology 2006年第4期28卷 37-42页

作者： Wang, Zheng-Zhi Li, Zhi-Feng Hang, Xing-Yi Mao, Yi-Qing Luo, Zhi-Gang Zhao, Dong-Sheng Zhang, Cheng-Gang College of Mechatronics Engineering and Automation National Univ. of Defense Technology Changsha 410073 China Institute of Radiation Medicine Academy of Military Medical Sciences Beijing 100850 China Institute of Health Administration and Medical Information Academy of Military Medical Sciences Beijing 100850 China National Lab of Parallel and Distributed Processing National Univ. of Defense Technology Changsha 410073 China

Experiments on transcription analysis have resulted huge genes expression data related with specific temporal and spatial information. These data can be used in new genes identification, analysis of genes express patterns and the annotation of genomes, which may provide the reference standard for experiment design and result analysis of transcription experiments. Since the alternative splicing of eukaryotic genes have found to be universal and play an important role in physiology and pathology, systematic analysis of alternative splicing is becoming a new hotspot of functional genome research. Facing the immense and exponential increase of experimental express data and more new genomes getting sequenced, there is exigent of the strategy which can handle transcription sequences in large scale and automatic way. We elucidate the algorithms, the computing requirements and programs in different transcription sequences analysis systems and propose a strategy more suitable for large scale analysis of alternative splicing.

关键词： Alternative splicing EST assembly EST clustering High performance computing Transcripton

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