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ieee International workshop on Factory Communication systems (WFCS)

作者： Falk Doherr Thomas Schmidt Leon Urbas Institute of Automation Chair of DCS Engineering Dresden University of Technology Dresden Germany

The decision for conventional parallel wiring or digital fieldbus technology is often arrived at rather early stages of the design process and therefore very often rather seems to be a matter of taste than to be derived via an objective goal function. To overcome this situation, we developed a prototypical engineering decision support system that combines an abstract definition of the communications needs with coarse equipment layout information to derive all the necessary figures to support an informed economic decision for a particular technology by automatically generating a fieldbus material take-off. This paper presents and discusses the architecture and features of the work-in-progress prototype which has been integrated in the commercial CAE-system COMOS.

关键词： Field buses Wiring Signal processing Prototypes distributed control Design engineering systems engineering and theory Decision support systems Cost function Design automation

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Panel: Challenge and opportunity of HPC-based distributed systems

Panel: Challenge and opportunity of HPC-based distributed sy...

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International Conference on parallel and distributed systems (ICPADS)

Summary form only given, as follows. While digital device and digital information become immersive, internet computing as a discipline is at a turning point. Modern computing and communication systems are unprecedented powerful and, in the meantime, unprecedented complex. On one hand, new computing paradigms, such as cloud computing, internet of things, cyberinfrastructure, and data centric computing, continue emerging to utilize technological advances. On the other hand, timely challenges, such as reliability, security, power consumption, and coordination and consistency, have to be addressed to meet the ever increasing user demand. High performance computing (HPC) is moving from Peta-flops era to Exa-scale era. How the changing will influence data center based distributed computing, and vice visa. We are at a historical point to ask: what are the challenges and opportunities of HPC-based distributed systems? This is especially true for Far East, where China just historically reached the first place on the HPC top500 list and launched a unique program in Internet of Things. This panel invites outstanding leaders around the world to explore deliberations regarding the strategic value of HPC-based distributed systems and discuss disruptive technologies and innovations most likely to overturn today’s internet computing landscape. A record of the panel discussion was not made available for publication as part of the conference proceedings.

关键词： Internet of Things Turning Cloud computing Reliability Security Power demand

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advances in system performance modelling, analysis and enhancement

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SIMULATION MODELLING PRACTICE AND THEORY 2009年第9期17卷 1443-1444页

作者： Min, Geyong Ould-Khaoua, Mohamed Univ Bradford Dept Comp Sch Informat Bradford BD7 1DP W Yorkshire England Sultan Qaboos Univ Dept Elect & Comp Engn Muscat Oman

The special issue of the ScienceDirect Journal contained 7 extended and revised papers that informed about some of the significant advancements in system performance modeling, analysis, and enhancement. These papers were presented at the International workshop on Performance Modeling, Evaluation, and Optimization of parallel and distributed systems (PMEO-PDS'07). The workshop was held along with the 21st ieee International parallel and distributed Processing Symposium (IPDPS'07) from March 26 30, 2007 in California, US. It aimed to promote the discussion on the development of innovative tools and techniques to deal with the rapid evolution and increasing complexity of high-performance computing and networking systems. The selected papers also dealt with a wide range of significant aspects of performance modeling, analysis, and enhancement of high-performance computing and networking systems.

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Sequence-preserving parallel IP lookup using multiple SRAM-based pipelines

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JOURNAL OF parallel AND distributed COMPUTING 2009年第9期69卷 778-789页

作者： Jiang, Weirong Prasanna, Viktor K. Univ So Calif Ming Hsieh Dept Elect Engn Los Angeles CA 90089 USA

SRAM (static random access memory)-based pipelined algorithmic solutions have become competitive alternatives to TCAMs (ternary content addressable memories) for high-throughput IP lookup. Multiple pipelines can be utilized in parallel to improve the throughput further. However, several challenges must be addressed to make such solutions feasible. First, the memory distribution over different pipelines, as well as across different stages of each pipeline, must be balanced. Second, the traffic among these pipelines should be balanced. Third, the intra-flow packet order (i.e. the sequence) must be preserved. In this paper, we propose a parallel SRAM-based multi-pipeline architecture for IP lookup. A two-level mapping scheme is developed to balance the memory requirement among the pipelines as well as across the stages in each pipeline. To balance the traffic, we propose an early caching scheme to exploit the data locality inherent in the architecture. Our technique uses neither a large reorder buffer nor complex reorder logic. Instead, a flow-aware queuing scheme exploiting the flow information is used to maintain the intra-flow sequence. Extensive simulation using real-life traffic traces shows that the proposed architecture with 8 pipelines can achieve a throughput of up to 10 billion packets per second, i.e. 3.2 Tbps for minimum size (40 bytes) packets, while preserving intra-flow packet order. (c) 2009 Elsevier Inc. All rights reserved.

关键词： IP lookup Pipeline SRAM Router

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parallel Genomic Alignments on the Cell Broadband Engine

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ieee TRANSACTIONS ON parallel AND distributed systems 2009年第11期20卷 1600-1610页

作者： Sarje, Abhinav Aluru, Srinivas Iowa State Univ Dept Elect & Comp Engn Ames IA 50011 USA Indian Inst Technol Dept Comp Sci & Engn Bombay Maharashtra India

Genomic alignments, as a means to uncover evolutionary relationships among organisms, are a fundamental tool in computational biology. There is considerable recent interest in using the Cell Broadband Engine, a heterogeneous multicore chip that provides high performance, for biological applications. However, work in genomic alignments so far has been limited to computing optimal alignment scores using quadratic space for the basic global/local alignment problem. In this paper, we present a comprehensive study of developing alignment algorithms on the Cell, exploiting its thread and data level parallelism features. First, we develop a parallel implementation on the Cell that computes optimal alignments and adopts Hirschberg's linear space technique. The former is essential, as merely computing optimal alignment scores is not useful, while the latter is needed to permit alignments of longer sequences. We then present Cell implementations of two advanced alignment techniques-spliced alignments and syntenic alignments. Spliced alignments are useful in aligning mRNA sequences with corresponding genomic sequences to uncover the gene structure. Syntenic alignments are used to discover conserved exons and other sequences between long genomic sequences from different organisms. We present experimental results for these three types of alignments on 16 Synergistic Processing Elements of the IBM QS20 dual-Cell blade system.

关键词： parallel algorithms biology and genetics pattern matching

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What the parallel-processing community has (failed) to offer the multi/many-core generation

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JOURNAL OF parallel AND distributed COMPUTING 2009年第9期69卷 807-812页

作者： Traff, Jesper Larsson NEC Europe Ltd NEC Labs Europe D-53757 St Augustin Germany

The International parallel and distributed Processing Symposium (IPDPS) 2008 panel with the title "How to avoid making the same Mistakes all over again: What the parallel-processing Community has (failed) to offer the multi/many-core Generation" sought to provoke discussion on current and recent computer science education in relation to the emergence of fundamentally parallel multi/many-core systems. Is today's/tomorrow's/yesterday's computer science graduate equipped to deal with the challenges of parallel software development for such systems? Are mistakes from the past being unnecessarily repeated? What are the fundamental contributions of the parallel processing research community to the current state of affairs that are possibly being ignored? What are the new challenges that have not been addressed in past parallel processing research? How should computer-science education in parallel processing look like? Should it be taught at all? To the extent that there was consensus among the panelists, they agreed on the premise for the panel, namely that there is a mismatch in computer-science education concerning parallelism, and that there may be reasons to be concerned. They agreed on stressing the importance of (a) applications as a driving factor in research and education, (b) parallel algorithms, and of (c) focusing on the ease of parallel programming and not exclusively on parallel performance, and cited for instance heterogeneous parallelism and power awareness as new issues for the multi-core generation. The panelists were Hideharu Amano (Keio University), John Gustafson (Clearspeed Technologies), Keshav Pingali (University of Austin, Texas), Vivek Sarkar (Rice University), Uzi Vishkin (University of Maryland), and Katherine Yelick (University of California at Berkeley). The panel was organized and moderated by the author. (c) 2009 Elsevier Inc. All rights reserved.

关键词： IPDPS panel discussion parallel processing Multi-core processors Education parallel algorithmics Applications Embedded processing Heterogeneous processing Power awareness

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Efficient Master/Worker parallel Discrete Event Simulation 09

Efficient Master/Worker Parallel Discrete Event Simulation

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23rd International workshop on Principles of Advanced and distributed Simulation

作者： Park, Alfred Fujimoto, Richard M. Georgia Inst Technol Computat Sci & Engn Div Atlanta GA 30332 USA

ISBN: (纸本)9780769537139

The master/worker (MW) paradigm can be used to implement parallel discrete event simulations (PDES) on metacomputing systems. MW PDES applications incur overheads not found in conventional PDES executions executing on tightly coupled machines. We introduce four techniques for reducing these overheads on public resource and desktop grid infrastructures Work unit caching, pipelined state updates, expedited message delivery, and adaptive work unit scheduling mechanisms are described that provide significant reduction in overall overhead when used in tandem. We present performance results showing that an optimized MW PDES system can exhibit performance comparable to a traditional PDES system for a queueing network and a particle physics simulation.

关键词： parallel discrete event simulation conservative synchronization caching PDES metacomputing volunteer computing grid computing simulation desktop grids Master/worker

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2009 ieee 10th workshop on Signal Processing advances in Wireless Communications, SPAWC 2009

2009 IEEE 10th Workshop on Signal Processing Advances in Wir...

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2009 ieee 10th workshop on Signal Processing advances in Wireless Communications, SPAWC 2009

ISBN: (纸本)9781424436965

The proceedings contain 146 papers. The topics discussed include: diversity order of linear equalizers for doubly selective channels;decentralized asymptotic detection by running consensus;a new distributed algorithm for parametric data modeling in wireless sensor networks;channel aware sensor selection in distributed detection systems;an SMF approach to distributed average consensus in clustered sensor networks;robust precoding for orthogonal space-time block coded MIMO cognitive radio networks;truth reveling opportunistic scheduling in cognitive radio systems;wideband spectrum sensing in cognitive radio: joint estimation of noise variance and multiple signal levels;a nonparametric sequential Kolmogorov-Smirnov test for transmit opportunity detection at the MAC layer;and outage margin and power constraints in cognitive radio with multiple antennas.

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proceedings of the 2nd International workshop on Data-Aware distributed Computing, DADC '09, Co-located with the 2009 International Symposium on High Performance distributed Computing, HPDC'09

Proceedings of the 2nd International Workshop on Data-Aware ...

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2nd International workshop on Data-Aware distributed Computing, DADC 2009, Co-located with the ACM/ieee International Conference on High Performance distributed Computing, HPDC 2009

ISBN: (纸本)9781605585895

The proceedings contain 4 papers. The topics discussed include: data-driven batch scheduling;a distributed architecture for data mining and integration;balancing TCP buffer vs parallel streams in application level throughput optimization;and abstract storage: moving file format-specific abstractions into petabyte-scale storage systems.

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CAMSAP 2009 - 2009 3rd ieee International workshop on Computational advances in Multi-Sensor Adaptive Processing

CAMSAP 2009 - 2009 3rd IEEE International Workshop on Comput...

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2009 3rd ieee International workshop on Computational advances in Multi-Sensor Adaptive Processing, CAMSAP 2009

ISBN: (纸本)9781424451807

The proceedings contain 103 papers. The topics discussed include: directed gossiping for distributed data aggregation;robust semiparametric amplitude estimation of sinusoidal signals: the multi-sensor case;robust short-term load forecasting using projection statistics;optimal scheduling and QoS power control for cognitive underlay networks;energy-efficient distributed spectrum sensing with convex optimization;time delay estimation in cognitive radio systems;comparison of precoding methods for broadband MIMO systems;MSE uplink-downlink duality of MIMO systems under imperfect CSI;hybrid probabilistic data association and variational filtering for multi-target tracking in wireless sensor networks;subspace-based Bayesian blind source separation for hyperspectral imagery;on MCMC-based particle methods for Bayesian;and a transceive strategy for regenerative multi-antenna multi-way relaying filtering: application to multitarget tracking.

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