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检索条件"任意字段=Proceedings of the 7th Workshop on Parallel and Distributed Simulation"

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Stochastic performance guarantees for mixed workloads in a multimedia information system

Stochastic performance guarantees for mixed workloads in a m...

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7th International workshop on Research Issues in Data Engineering - High Performance Database Management for Large-Scale Applications

作者： Nerjes, G Muth, P Weikum, G Univ of the Saarland Saarbruecken Germany

ISBN: (纸本)0818678496

We present an approach to stochastic performance guarantees for multimedia sewers with mixed workloads. Advanced multimedia applications such as digital libraries or teleteaching exhibit a mixed workload with accesses to both 'continuous' and conventional, 'discrete' data, where the fractions of continuous-data and discrete-data requests vary over time. We assume that a server shares all disks among continuous and discrete data, and we develop a stochastic performance model for the resulting mixed workload, using a combination of analytic and simulation-based modeling. Based on this model we devise a round-based scheduling scheme with stochastic performance guarantees: for continous-data requests, we bound the probability that 'glitches' occur and for discrete-data requests, we bound the probability that the response time exceeds a certain tolerance threshold. We present early results of simulation studies.

关键词： distributed database systems

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Research on Serial and parallel Electromagnetic Transient simulation Structure 7

Research on Serial and Parallel Electromagnetic Transient Si...

引用

7th IEEE International Conference on High Voltage Engineering and Application, ICHVE 2020

作者： Ye, Xiaohui Tang, Yong Lu, Yiming Lyu, Guangxian Du, Jian Tan, Lu China Electrical Power Research Institute Beijing100192 China

ISBN: (纸本)9781728155111

Electromagnetic transient simulation uses three-phase instantaneous values for calculation. Compared with electromechanical transient simulation, it has large amount of simulation, so it needs to adopt a parallel simulation method. To perform full electromagnetic simulation on general computer, this paper proposed a series-parallel hybrid simulation archetecture suitable for large scale power system with low-density parrallel computing. Base on the characteristics of double-sided read-write and double-sided time restriction of distributed parameter lines, this shared memory read-write mode has a natural mutual exclusion, which fundamentally eliminates the conflict of memory data and does not need to introduce the mutual exclusion mechanism. the method of shared memory can realize multi-threaded and cross program computing quickly. At the same time, the method based on shared memory and socket technology can realize parallel computing of cluster. Finally, an example of large-scale power grid is given, and the results on different general computers are compared to verify the effectiveness of the proposed architecture. © 2020 IEEE.

关键词： Electromagnetic simulation

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CM-SIM: a parallel circuit simulator on a distributed memory multiprocessor

CM-SIM: a parallel circuit simulator on a distributed memory...

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proceedings of the 7th International Conference on VLSI Design

作者： Ramamoorthy, C.V. Vij, Vikram Univ of California Berkeley United States

ISBN: (纸本)0818649909

We took the design of an existing circuit simulator, SPICE, considered various parallelization techniques, and selected a relaxation-based algorithm, Iterated Timing Analysis, for further study. In this report, the implementation of this algorithm on the CM-5 is described. simulation is performed by a collection of subcircuits communicating with one another by sending asynchronous event messages. Initial studies on two platforms, Split-C, a parallel extension of C, and the CMMD message passing library, indicate that this approach, with appropriate partitioning and scheduling taking granularity into account, has a great deal of potential for reducing the cost of circuit simulation. We also tried to exploit parallelism by scheduling the events optimistically. Trace driven analysis shows that the optimistic simulation method exploits more parallelism then the conservative methods for circuits with feedback signal paths.

关键词： Integrated circuit layout

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simulation of cloud computation MPI applications 7

Simulation of cloud computation MPI applications

引用

7th International Conference distributed Computing and Gridtechnologies in Science and Education, GRID 2016

作者： Kutovskiy, N.A. Nechaevskiy, A.V. Ososkov, G.A. Trofimov, V.V. Joint Institute for Nuclear Research 6 Joliot-Cur ie street Dubna Moscow Region141980 Russia Plekhanov Russian University of Economics 36 Stremyanny per. Moscow117997 Russia

At the Laboratory of Information Technologies of the Joint Institute for Nuclear Research new software for job parallel calculation on the cloud resources and computing cluster is in progress. It is expected that created cloud center of parallel computing will significantly improve the efficiency of the numerical calculations and expedite the receipt of new physically meaningful results. At the moment, on the basis of the JINR computer center a parallel algorithm and corresponding software for parallel computing using MPI technology are developed. To optimize the scheme of parallel computations it is necessary to test the algorithm for various combinations of equipment parameters, number of processors and parallelization levels. thus, the need to evaluate the impact of various factors (processor speed, throughput of communication network, its latency) to computing speed of particular job is arisen. Such evaluation can be achieved by simulating the MPI computing processes. Results of the MPI computing simulations is presented on the example of calculating long Josephson junctions. © 2016 Nikolay A. Kutovskiy, Andrey V. Nechaevskiy, Gennadiy A. Ososkov, Vladimir V. Trofimov.

关键词： parallel processing systems

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A new k-graph partition algorithm for distributed P2P simulation systems

A new k-graph partition algorithm for distributed P2P simula...

引用

7th International Conference on Algorithms and Architectures for parallel Processing

作者： Wu, Chunjiang Zhou, Shijie Wei, Linna Luo, Jiaqing Wang, Yanli Yang, Xiaoqian Univ Elect Sci & Technol China Sch Comp Sci & Engn Chengdu 610054 Sichuan Peoples R China

ISBN: (纸本)9783540729044

While simulating a P2P system with distributed simulator, it generally requires that one single large network topology should be pre-divided into some small sub-nets, each of which denotes a group of peers in the P2P system. Because of interconnectivity of the simulated network, the sub-nets running on different simulation node must exchange message with each other to complete the simulation task. Based on the knowledge of degree sequence and breadth-first search, this paper proposes a novel approximate algorithm of k-graph partition. By this optimized algorithm, a large P2P network topology can be divided into k sub-nets while not only the traffic among different sub-net is minimized, but also the tasks of simulation are balanced. through the analysis of time complexity, load balance and edge-cut experimental results for different network topology, it shows our algorithm is a feasible method applied for distributed P2P simulation systems.

关键词： P2P distributed simulation graph partition degree sequence breadth-first search

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Specification and implementation of an extensible multimedia system 7th

引用

7th International workshop on Interactive distributed Multimedia Systems and Telecommunication Services

作者： Hauser, J Rothermel, K Univ Stuttgart Inst Parallel & Distributed High Performance Syst IPVR D-70565 Stuttgart Germany

ISBN: (纸本)3540411305

Multimedia authoring does not consist solely of the specification of the temporal and spatial layout of a document. Application specific concepts (e.g. for computer based training) or animation effects (e.g. moving media items) are often required by authors, Existing multimedia authoring tools support only one specific concept for the temporal specification, spatial specification and interaction. this paper presents research results for an extensible multimedia system called MAVA (MultimediA document Versatile Architecture). It allows to integrate new and alternative concepts for multimedia documents. MAVA uses an operator based approach as meta document model, what means that all extensions will define concrete operators that will be used by authors.

关键词： Multimedia systems

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From parallel to distributed computing as application to simulate magnetic properties-structure relationship for new nanomagnetic materials 7

From parallel to distributed computing as application to sim...

引用

7th International Conference distributed Computing and Gridtechnologies in Science and Education, GRID 2016

作者： Mohorianu, S. Craus, M.-L. National Institute of Research and Development for Technical Physics Romania 47 Mangeron Boulevard IasiRo-700050 Romania 6 Joliot Curie Dubna141980 Russia

Modern materials science is based in principle on the fundamental experience that the properties of materials are not peremptorily determined by their average chemical composition but they are to a large extent influenced by the distances between atoms and characteristics of their bonds, implicitly by their microstructure. Now, it is obvious that the outstanding success of magnetic materials for the last two decades may be ascribed to three relevant accomplishments: -overall improvements in general expertise and techniques in sample synthesis;- A dramatic refinement and development of new methods and probes for magnetic materials characterization;-the increasing importance of nano-level studies that led to the ingenious ways of producing nanoparticle samples, new techniques for element specific studies, goin down to atomic resolution studies and even to single atoms at surfaces and interfaces. In the last projects completed in recent years we have analyzed and studied magnetic materials mostly micro and nano scale ferro-, ferrimagnetic and ferroic perovskites, enumerating here (nano)cobaltites, (nano)manganites and other nanomagnetic materials. Almost all of them, listed up require massive data processing. At that time, it became obvious to us that it needs another embodiment, namely in the processing data activity. In 2010 we introduce parallel computing applications on the simulation of the structure, magnetic and transport properties to explain the structure-properties relationships for some new nanomagnetic materials. Knowing quite substantial intersection of the parallel computing and distributed, we think it is of common sense to introduce our applicative work in magnetism and magnetic materials science modeling properties, in the context of distributed computing applications. Our latest research specializes in improving techniques for high-level simulation in the design of nano-materials with controlled magnetic properties. We used a package built on Linux, c

关键词： Magnetic properties

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the data-parallel Ada run-time system, simulation and empirical results 7

The data-parallel Ada run-time system, simulation and empiri...

引用

7th International parallel Processing Symposium, IPPS 1993

作者： Mayer, H.G. Jahnichen, S. Tech. Univ. Berlin Germany

ISBN: (纸本)0818634421

the parallel Ada Run-Time System (PARTS), developed at TUB, is the target of an experimental translator that maps sequential Ada to a shared-memory multi-processor. Other modules of the parallel compiler are not explained. the paper summarizes the multi-processor run-time system;it explains those instructions that activate multiple processors leading to SPMD execution and discusses the scheduling policy Default architectural attributes of PARTS can be custom-tailored for each run without re-compile. the experiments exposed different machine personalities by measuring execution time profiles of the vector product run on different architectures. the goal is to find experimentally, how well a shared-memory architecture scales up to an increasing problem size, and how well the problem size scales up for a fixed multi-processor configuration. the measurements expose the advantages of shared-memory multi-processor architectures to exploit one dimension of parallelism. However, scalability is limited to the number of memory ports. therefore another architectural dimension of parallelism, distributed-memory, must be combined with shared memories to achieve Tera-FLOP performance. © 1993 IEEE.

关键词： Scalability

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Hierarchical distributed diagnosis under global consistency 7

Hierarchical distributed diagnosis under global consistency

引用

7th International workshop on Discrete Event Systems, WODES 2004

作者： Su, R. Wonham, W.M. Dept. Electrical and Computer Engineering University of Toronto TorontoONM5S 3G4 Canada

In this paper we first introduce the concept of the supremal global support to capture interaction among local components. then we propose a hierarchical diagnosis approach, whose main objective is to achieve supremal... 详细信息

关键词： Discrete event simulation

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Efficient processor allocation scheme for mesh connected parallel computers

Efficient processor allocation scheme for mesh connected par...

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proceedings of the 1995 7th IEEE Symposium on parallel and distributed Processing

作者： Upadhyay, Jatin Mohapatra, Prasant Iowa State Univ Ames United States

Several processor allocation schemes are proposed in the literature for mesh connected parallel computers. All these schemes aim at improving the system performance by reducing internal fragmentation or by enhancing the submesh recognition ability. In this paper, we propose an approach of system partitioning to reduce external fragmentation and thereby improve the system performance. the target systems considered here are two-dimensional meshes where the side lengths are powers of two. Processors are allocated to a partitioned mesh based on their submesh size requirements. the proposed scheme can be implemented in conjunction with any of the existing schemes and thereby can also exploit the advantages offered by those schemes. the performance measurements are done through simulation experiments. Completion time for a fixed number of jobs, internal and external fragmentation, and system utilization are obtained. It is observed that, in most cases, the proposed scheme demonstrates better performance. Time complexity of the proposed scheme is less by a factor of n compared to the corresponding allocation scheme without partitioning, where n = log2 〈min (width or height of the mesh)〉.

关键词： parallel processing systems

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