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检索条件"主题词=Parallel Discrete Event Simulation"

共 148 条记录，以下是11-20 订阅

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EMPLOYING PROXIES TO IMPROVE parallel discrete event simulation PERFORMANCE

EMPLOYING PROXIES TO IMPROVE PARALLEL DISCRETE EVENT SIMULAT...

引用

2010 Winter simulation Conference

作者： Mutschler, David W. Naval Air Syst Command Patuxent River MD 20670 USA

ISBN: (纸本)9781424498642

Proxies are caches of information maintained by one simulation object about other simulation objects. Though proxies can require significant overhead to maintain consistency, their judicious use can improve parallel performance by increasing speedup. This paper discusses three cases where careful use of proxies has improved speedup in a parallel discrete event simulator implemented using threaded worker pools.

关键词： cache storage discrete event simulation information cache jamming parallel discrete event simulation parallel processing proxy

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Controlled Asynchronous GVT: Accelerating parallel discrete event simulation on Many-Core Clusters 19

Controlled Asynchronous GVT: Accelerating Parallel Discrete ...

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48th International Conference on parallel Processing (ICPP)

作者： Eker, Ali Williams, Barry Chiu, Kenneth Ponomarev, Dmitry Binghamton Univ Binghamton NY 13902 USA

ISBN: (纸本)9781450362955

In this paper, we investigate the performance of parallel discrete event simulation ( PDES) on a cluster of many-core Intel KNL processors. Specifically, we analyze the impact of different Global Virtual Time (GVT) algorithms in this environment and contribute three significant results. First, we show that it is essential to isolate the thread performing MPI communications from the task of processing simulation events, otherwise the simulation is significantly imbalanced and performs poorly. This applies to both synchronous and asynchronous GVT algorithms. Second, we demonstrate that synchronous GVT algorithm based on barrier synchronization is a better choice for communication-dominated models, while asynchronous GVT based on Mattern's algorithm performs better for computation-dominated scenarios. Third, we propose Controlled Asynchronous GVT (CA-GVT) algorithm that selectively adds synchronization to Mattern-style GVT based on simulation conditions. We demonstrate that CA-GVT outperforms both barrier and Mattern's GVT and achieves about 8% performance improvement on mixed computation-communication models. This is a reasonable improvement for a simple modification to a GVT algorithm.

关键词： parallel discrete event simulation Intel Xeon Phi Knights Landing Manycore Architectures Performance Global Virtual Time

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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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Properties of the Conservative parallel discrete event simulation Algorithm 14th

引用

14th International Conference on parallel Computing Technologies (PaCT)

作者： Ziganurova, Liliia Shchur, Lev Sci Ctr Chernogolovka Chernogolovka 142432 Moscow Region Russia Natl Res Univ Higher Sch Econ Moscow 101000 Russia Landau Inst Theoret Phys Chernogolovka 142432 Moscow Region Russia

ISBN: (纸本)9783319629322;9783319629315

We address question of synchronisation in parallel discrete event simulation (PDES) algorithms. We study synchronisation in conservative PDES model adding long-range connections between processing elements. We investigate how fraction of the random long-range connections in the synchronisation scheme influences the simulation time profile of PDES. We found that small fraction of random distant connections enhance synchronisation, namely, the width of the local virtual times remains constant with increasing number of processing elements. At the same time the conservative algorithm of PDES on small-world networks remains free from deadlocks. We compare our results with the case-study simulations.

关键词： parallel discrete event simulation PDES Conservative algorithm Small-world

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GVT-Guided Demand-Driven Scheduling in parallel discrete event simulation 21

GVT-Guided Demand-Driven Scheduling in Parallel Discrete Eve...

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50th International Conference on parallel Processing (ICPP)

作者： Eker, Ali Timmerman, David Williams, Barry Chiu, Kenneth Ponomarev, Dmitry SUNY Binghamton Binghamton NY 13902 USA

ISBN: (纸本)9781450390682

The performance and scalability of parallel discrete event simulation (PDES) can be significantly impacted by temporarily inactive threads that occupy CPU resources but do no useful processing. A recent design called Demand-Driven PDES (DD-PDES) identifies such threads and de-schedules them from CPU cores to eliminate the unnecessary overhead. In this paper, we propose significant further improvements to DD-PDES. First, we introduce a new GVT (Global Virtual Time)-guided algorithm named GG-PDES to perform de-scheduling operations in a lock-free fashion and without relying on a centralized controller thread as was used previously. Second, we introduce the Dynamic CPU Affinity algorithm built on top of GG-PDES that adaptively pins simulation threads to CPU cores to achieve a balanced execution. We demonstrate that these optimizations can yield performance improvements in the range of 13% to 50% over the original DD-PDES system.

关键词： parallel discrete event simulation Global Virtual Time Intel Xeon Phi Manycore Architecture Performance simulation Locality

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JAVA FOR parallel discrete event simulation: A SURVEY

JAVA FOR PARALLEL DISCRETE EVENT SIMULATION: A SURVEY

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21st European Modeling and simulation Symposium

作者： Castilla, I. Aguilar, R. Univ La Laguna Dept Syst Engn & Automat E-38207 San Cristobal la Laguna Spain

ISBN: (纸本)9788469254141

Since the early 90s, when it was first released, Java has become one of the most widespread programming languages. discrete event simulation and also parallel discrete event simulation have attracted more and more projects which are Java-based. This paper presents a brief survey on the tools and facilities that make Java such an attractive option for parallel simulation developers. Nevertheless, several drawbacks and lacks of the language are also exposed.

关键词： parallel discrete event simulation Java Survey

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Devastator: A Scalable parallel discrete event simulation Framework for Modern C plus 38

Devastator: A Scalable Parallel Discrete Event Simulation Fr...

引用

38th ACM SIGSIM International Conference on Principles of Advanced discrete simulation (ACM SIGSIM PADS)

作者： Bachan, John Nguyen, Tan Natarajan, Mahesh Bremer, Maximilian Chan, Cy Jiang, Xuan Ye, Jianlan Lawrence Berkeley Natl Lab Berkeley CA USA Univ Calif Berkeley Berkeley CA USA Arizona State Univ Tempe AZ USA

ISBN: (纸本)9798400703638

parallel discrete event simulation is a fundamental simulation technology that is essential to the parallelization of event-based models including hardware and transportation systems. parallelization is often difficult due to dynamic data-dependencies and limited computational work for hiding runtime overheads. We present Devastator, a scalable parallel discrete event simulation framework for modern C++. Devastator provides a productive API that leverages C++'s type system to eliminate boilerplate code. Devastator has been designed to specifically optimize performance on distributed many-core architectures with deepening memory hierarchies. Devastator relies on the GASNet-Ex communication runtime as well as lock-free message queues to achieve highly competitive performance. We perform strong and weak scaling studies on NERSC's Perlmutter up to 32,698 cores and demonstrate an up to 5x speed-up over the ROSS simulator for workloads with substantial locality.

关键词： High-performance computing parallel discrete event simulation Time Warp active messages GASNet

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A CTL-based parallel discrete event simulation Model Verification Method 3

A CTL-based Parallel Discrete Event Simulation Model Verific...

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IEEE 3rd Information Technology, Networking, Electronic and Automation Control Conference (ITNEC)

作者： Hu, Tengfei Yao, Yiping Zhu, Feng Natl Univ Def Technol Coll Syst Engn Changsha Hunan Peoples R China

ISBN: (纸本)9781538662434

In view of the present without formal verification method of the parallel event simulation model based on Entity Interaction Graph (EIG). This paper proposes an EIG model checking method based on CTL. This method transform EIG model into Kripke structure, and then use Computation Temporal Logic (CTL) describe the property of EIG model, finally input the Kripke structure and the specification described by CTL to the NuSMV. As a result, the verification of EIG model is realized by this way. Experimental results show that this method can effectively verify the correctness of EIC model and lay a foundation for the establishment of reliable parallel discrete event simulation.

关键词： Entity Interaction Graph Model Checking Computation Temporal Logic parallel discrete event simulation

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Time Management in parallel discrete event simulation

Time Management in Parallel Discrete Event Simulation

引用

International Forum on Information Technology and Applications (IFITA 2009)

作者： Wang Xuehui Zhang Lei Xiao Nong Tang Yuhua Natl Univ Def Technol Sch Comp Changsha 410073 Hunan Peoples R China

ISBN: (纸本)9780769536002

The time management(TM) is concerned with ensuring that the execution of the parallel discrete event simulation is properly synchronized. This is particularly important for simulations, not only to ensure that events are processed in a correct order, but also to ensure that repeated executions of a simulation with the same inputs produce exactly the same results. The goal of the synchronization mechanism was to ensure that each LP processes events in time-stamp order. This requirement was referred to as the local causality constraint (LCC). This paper begins with introduction of synchronization mechanisms, and then comparatively discusses conservative algorithms and optimistic algorithms. Finally we emphatically provide and describe the implementation of a new optimized algorithm, termed as the flexible cycle algorithm, which solve the fatal problems of conservative or optimistic algorithms, resulting in the best of both methods.

关键词： time management parallel discrete event simulation synchronization mechanism flexible cycle algorithm

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PERFORMANCE PREDICTION OF CONSERVATIVE parallel discrete event simulation

PERFORMANCE PREDICTION OF CONSERVATIVE PARALLEL DISCRETE EVE...

引用

8th International Industrial simulation Conference

作者： Lencse, Gabor Varga, Andras Szechenyi Istvan Univ Egyet Ter 1 H-9026 Gyor Hungary Opensim Ltd H-1032 Budapest Hungary

ISBN: (纸本)9789077381557

In a previous paper, a quantitative criterion has been proposed for efficient execution of the Null Message Protocol, the best- known conservative parallel discrete event simulation (PDES) protocol. The criterion is based on a novel concept of the coupling factor, and allows one to use intuitive and easy-to-measure input parameters. The criterion can be used to assess simulation models 'potential for parallel execution as well as the maximum partitioning that may still potentially yield good performance. This paper deals with experimental verification of the proposed rule that a large coupling factor is a necessary precondition for getting a good speed-up with conservative parallel simulation. A closed queueing network is used as simulation model, and it is run on up to 24 CPU cores. It is shown that the criterion provides a quick and convenient way to determine whether a simulation model has a potential for speed-up before actually investing work in the parallelization.

关键词： performance analysis parallel discrete event simulation conservative synchronisation method speed-up OM-NeT plus

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