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Rupeas: Ruby powered event analysis DSL

Rupeas: Ruby powered event analysis DSL

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International Conference on Networked Sensing Systems

作者： Woehrle, Matthias Plessl, Christian Thiele, Lothar Computer Engineering and Networks Lab ETH Zurich Switzerland Paderborn Center for Parallel Computing University of Paderborn Germany

ISBN: (纸本)9781424479108

Wireless Sensor Networks (WSNs) are unique embedded computer systems for distributed sensing of a dispersed phenomenon. As WSNs are deployed in remote locations for longterm unattended operation, assurance of correct functioning of the system is of prime concern. Thus, the design and development of WSNs requires specialized tools to allow for testing. To this end, we present a novel language, Rupeas, for analyzing WSNs based on collected events during system operation. Rupeas is independent from test specifics and thus generally applicable for analyzing event logs of WSN test executions. © 2010 IEEE.

关键词： Wireless sensor networks

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HiHiSpMV: Sparse Matrix Vector Multiplication with Hierarchical Row Reductions on FPGAs with High Bandwidth Memory 32

HiHiSpMV: Sparse Matrix Vector Multiplication with Hierarchi...

引用

32nd IEEE Annual International Symposium on Field-Programmable Custom computing Machines, FCCM 2024

作者： Tareen, Abdul Rehman Meyer, Marius Plessl, Christian Kenter, Tobias Paderborn University Paderborn Center for Parallel Computing Department of Computer Science Warburger Str. 100 Paderborn33098 Germany

ISBN: (纸本)9798350372434

The multiplication of a sparse matrix with a dense vector is a vital operation in linear algebra, with applications in numerous contexts. After earlier research on FPGA acceleration of this operation had shown the potential to achieve a high bandwidth efficiency, this workload has received renewed attention with the introduction of high bandwidth memory on FPGA platforms. However, previous designs fell short of scaling to the full bandwidth potential of current FPGA platforms with high bandwidth memory. In this work, we present HiHiSpMV with a novel design approach around hierarchical accumulation, which allows us to overcome several limitations of the related work. Our design is completely implemented with high-level synthesis and compiled with Vitis, and instantiates 16 independent compute units, each processing up to 16 matrix elements per clock cycle. The reduction of these elements is performed without any latency or resource overhead and the subsequent accumulation uses the well-established shift-register design pattern. Due to the independent nature of compute units, our design can connect to all of the 32 high bandwidth memory pseudo-channels in 512-bit interface mode on an Alveo U280 FPGA board. In our tests, we reach up to 86% of the theoretical available bandwidth of this FPGA platform, enabling a computational throughput of up to 98 GFLOPS. This is about 1.5 × faster than the peak throughput of the best related work in that regard, Serpens. On average, the throughput of HiHiSpMV is even 2.7× higher than Serpens. © 2024 IEEE.

关键词： Shift registers

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PadFEM: A portable parallel FEM-tool

PadFEM: A portable parallel FEM-tool

引用

International Conference and Exhibition on High-Performance computing and Networking, HPCN EUROPE 1996

作者： Diekmann, Ralf Dralle, Uwe Neugebauer, Friedhelm Römke, Thomas Department of Computer Science University of Paderborn Paderborn33095 Germany Paderborn Center for Parallel Computing PC 2 University of Paderborn Paderborn33095 Germany

ISBN: (纸本)9783540611424

We present a modular toolbox for parallel finite element simulations on distributed memory systems. The library named PadFEM includes a graphical editor for specifying domains with boundary conditions, automatic mesh generation, automatic mesh partitioning and mapping onto the processors of a MIMD-system. The parallel FEM-simulation uses the preconditioned conjugate gradient method. The parallelization is based on PVM which guarantees portable parallel code. The current implementation is able to solve the two-dimensional Poisson equation in arbitrary domains with mixed Dirichlet- and Neumann-type boundary conditions using triangular meshes. The modular structure based on the idea of programming frames allows an easy extension to other problems. © Springer-Verlag Berlin Heidelberg 1996.

关键词： Boundary conditions

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Oblivious parallel probabilistic channel utilization without control channels 20

Oblivious parallel probabilistic channel utilization without...

引用

20th IEEE International parallel and Distributed Processing Symposium, IPDPS 2006

作者： Schindelhauer, Christian Voß, Kerstin University of Paderborn Heinz Nixdorf Institute Fuerstenallee 11 33102 Paderborn Germany University of Paderborn Paderborn Center for Parallel Computing Fuerstenallee 11 33102 Paderborn Germany

ISBN: (纸本)1424400546

The research interest in sensor nets is still growing because they simplify data acquisition in many applications. If hardware resources are very sparse, routing algorithms cannot use data gathering. However, if a large number of channels can be used, then parallel transmission can compensate this drawback. If the senders and receivers are not known in advance, then a control channel poses a bottleneck for communication. We present an oblivious MAC protocol, called the Funnel protocol, where the channels are nearly optimally utilized in parallel. In this, senders and receivers choose for a polylogarithmic number of rounds (several sending attempts) a decreasing number of channels which are selected equiprobably. Then, we show that a previously presented approach using only one round and therefore one type of probability distribution is optimal up to some constant factor, and considerably worse than the Funnel protocol. The protocol works with few resources if an sufficient number of channels is available. The Funnel protocol is simple, elegant, and does not need to know the number of senders and receivers, thus being oblivious. On the bottom line we prove that small messages can be efficiently transmitted by the MAC layer in parallel without a control channel if more than one channel for communication can be used. © 2006 IEEE.

关键词： parallel processing systems

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A distributed computing center software for the efficient use of parallel computer systems

A distributed computing center software for the efficient us...

引用

International Conference and Exhibition on High-Performance computing and Networking, HPCN 1994

作者： Ramme, F. Römke, T. Kremer, K. Paderborn Center for Parallel Computing University of Paderborn Warburger Str. 100 Paderborn33095 Germany University of Technology Aachen Computing Center Seffenter Weg 23 Aachen52074 Germany

ISBN: (纸本)9783540579816

Nowadays, computing systems accessible to researchers with "Grand Challenge" problems consist of a hardware mixture ranging from clusters of workstations to parallel supercomputers. This hardware is available via geographically distributed networks with various communication capabilities. Within this paper the computing center Software (CCS) is introduced. This software package is implemented as a message based distributed application by itself. Thus, it is considerable simplified to integrate new MPP systems into an existing environment. Giving the same look and feel when accessing different types of parallel or distributed computer systems will bring the idea of metacomputing close to practice. This paper takes a look behind CCS. The underlying model which uses abstract views for specifying system components and a general purpose Resource Description Language is sketched. We explain how it is possible to support Wide-Area Network access and unstable connection lines. Afterwards, we present the system and vendor independent batch processing facility usable for arbitrary programming environments. A sample user session and first prototype installations complete our work. © 1994, Springer Verlag. All rights reserved.

关键词： Wide area networks

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EvAnT: Analysis and checking of event traces for wireless sensor networks

EvAnT: Analysis and checking of event traces for wireless se...

引用

2008 IEEE International Conference on Sensor Networks, Ubiquitous, and Trustworthy computing, SUTC 2008

作者： Woehrle, Matthias Plessl, Christian Lim, Roman Beutel, Jan Thiele, Lothar ETH Zurich Computer Engineering and Networks Lab. 8092 Zurich Switzerland University of Paderborn Paderborn Center for Parallel Computing 33102 Paderborn Germany

ISBN: (纸本)9780769531588

Testing and verification methodologies for Wireless Sensor Networks (WSN) systems in pre-deployment are vital for a successful deployment. Increased visibility of the internal state of a WSN application is established by instrumenting the application for logging execution traces at runtime. While the interpretation of the event traces is application-specific, a common method for analysis can be devised. This method should allow for a concise formulation of explorative queries to determine the occurrence and the cause of functional or performance problems. The contribution of this paper is an event analysis methodology that is implemented in the EvAnT framework. EvAnT allows for specifying queries that are executed on the collected traces. EvAnT is specifically tailored to WSN testing and debugging. We demonstrate the applicability of EvAnT by a case study in a building monitoring project. © 2008 IEEE.

关键词： Wireless sensor networks

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Evaluation of applied intra-disk redundancy schemes to improve single disk reliability

Evaluation of applied intra-disk redundancy schemes to impro...

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IEEE Annual International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems

作者： Grawinkel, Matthias Schäfer, Thorsten Brinkmann, André Hagemeyer, Jens Porrmann, Mario Paderborn Center for Parallel Computing PC2 University of Paderborn Germany Heinz Nixdorf Institute System and Circuit Technology University of Paderborn Germany

ISBN: (纸本)9780769544304

Exponentially growing capacities of disk drives have increased the problem that not only a complete disk can fail, but also individual, small groups of sectors can be erroneous. These sector errors are especially critical during RAID rebuilds because they can only be detected when the corresponding sectors are read. Mechanisms to cope with sector errors, therefore, have become an important way to improve disk reliability. One approach to deal with sector errors is the introduction of intra-disk redundancy, where additional redundancy blocks are calculated and stored for each set of disk sectors. Previous studies have introduced intra-disk redundancy schemes and have evaluated their impact on disk reliability. None of these studies has evaluated the influence on disk drive performance or the underlying energy consumption. The study presented in this paper benchmarks existing schemes concerning these metrics. It shows the surprising result that weaker codes combined with newly introduced scrambling techniques can produce faster layouts with similar reliability properties than previously proposed strong codes. © 2011 IEEE.

关键词： Energy utilization

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Heuristic solutions for a mapping problem in a TV-Anytime server network

Heuristic solutions for a mapping problem in a TV-Anytime se...

引用

15 Workshops Held in Conjunction with the IEEE International parallel and Distributed Processing Symposium, IPDPS 2000

作者： Zhou, Xiaobo Lüling, Reinhard Xie, Li Paderborn Center for Parallel Computing University of Paderborn Fürstenallee 11 D-33102 Paderborn Germany Department of Computer Science Nanjing University China

ISBN: (纸本)354067442X

This paper presents a novel broadband multimedia service called TV-Anytime. The basic idea of this service is to store broadcast media assets onto media server systems and allow clients to access these streams at any time. We propose a hierarchical structure of a distributed server network to support a high quality TV-anytime service. A key issue, how to map the media assets onto such a hierarchical server network is addressed and formalized as a combinatorial optimization problem. In order to solve this optimization problem, a set of heuristic solutions by use of a parallel simulated annealing library is proposed and verified by a set of benchmark instances. Finally, the TV Cache is presented as a prototype of a scalable TV-Anytime system. © 2000 Springer-Verlag Berlin Heidelberg.

关键词： Simulated annealing

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On advantages of grid computing for parallel job scheduling

On advantages of grid computing for parallel job scheduling

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2nd IEEE/ACM International Symposium on Cluster computing and the Grid, CCGrid 2002

作者： Ernemann, Carsten Hamscher, Volker Schwiegelshohn, Uwe Yahyapour, Ramin Streit, Achim Computer Engineering Institute University Dortmund 44221 Dortmund Germany PC2 - Paderborn Center for Parallel Computing 33102 Paderborn Germany

ISBN: (纸本)0769515827

This paper addresses the potential benefit of sharing jobs between independent sites in a grid computing environment. Also the aspect of parallel multi-site job execution on different sites is discussed. To this end, various scheduling algorithms have been simulated for several machine configurations with different workloads which have been derived from real traces. The results showed that a significant improvement in terms of a smaller average response time is achievable. The usage of multi-site applications can additionally improve the results as long as the increase of the execution time due to communication overhead is limited to about 25%. © 2002 IEEE.

关键词： Grid computing

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Workload analysis of computation intensive tasks: Case study on SPEC CPU95 benchmarks

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3rd International Conference on parallel Processing, Euro-Par 1997

作者： Simon, Jens Vieth, Marco Weicker, Reinhold PC2 - Paderborn Center for Parallel Computing Germany SNI - Siemens Nixdorf Informationssysteme AG Germany

ISBN: (纸本)9783540634409

Several performance analysis tools have been developed with the drawback of dedicated hardware solutions or the compute intenseness of simulations. The modern microprocessors, with hardware support for counting of system hardware events, now make possible universal software tools for the performance analysis of complex application programs such as the SPEC benchmarks. In this paper, we present a new method to determine system resource utilization (cache miss ratios, CPI values, branch miss predictions) of arbitrary programs, based on a sampling technique, combined with access to processor-internal event counter registers. We present the sprof tool set that is based on this method and enables also the detailed analysis of individual subroutines of a program, as they are executed over time. The high accuracy and the negligible overhead of the tool set is demonstrated. We used the SPEC95 benchmark suite, consisting of 8 integer and 10 floating-point intensive non-trivial programs that are commonly used to define the performance of workstations and servers. As an example, we present the analysis of a SPEC CPU95 benchmark program on different processor architectures.

关键词： Application programs

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