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Performance Analysis and Tuning of Large-scale Finite Element Analysis Program on Multi-core Cluster Platform
大规模结构有限元分析程序在多核集群计算环境中的性能分析和优化

LV Hai,DI Rui-hua,GONG Hua,<br>吕海,,
计算机科学 , 2012,
Abstract: Through the performance analysis of an open source finite clement software based on MPI program model on multi core cluster platform, some performance bottlenecks were founded. Based on the performance bottleneck analysis,two optimization plans based on MPI/OpenMP hybrid parallel program model were proposed, one of them resolves the inefficiency in solving linear or nonlinear system equations, and the other one elevates processes communication performance. Experiment results show that hybrid parallel solver can efficiently promote the pure MPI based parallel program performance, as up to 3 times. I}he multi-thread multi-process communication plan can do some optimization, but is not the best solution in this case. The overall optimized performance analysis indicates that on multi-core cluster computing platform, MPI/OpenMP parallel program model can more efficiently utilize hardware system computation resource.
Research and Implementation of Trade Map Creation Software with Parallel Processing Solution
贸易地图生成软件并行处理方案的研究与实现

SHAO Fei,DI Rui-Hua,<br>邵飞,
计算机科学 , 2008,
Abstract: By way of analyzing the key character of the Trade Map Creating Software in this paper,a series of performance bottlenecks of it are located and studied when running,and put the parallel processing solution based on parametric sweep which is fittest for the system into practice on the cluster.It has been concluded that the proper solution can make the time of creating Trade Map shorter and the performance of the system better.
Research on Application-driven Parallel Program Performance Tuning
应用驱动的并行程序性能优化研究

DI Rui-hua,JIANG Hai-hua,LV Hai,<br>,蒋海,吕 海
计算机科学 , 2013,
Abstract: Multi-core processor provides multiple threads parallel execution capability, and makes applications to have huge potential for performance improvement, but makes it enormously challenge to efficiently develop high-performance program Meanwhile, through the old process of performance optimization, the scalability is difficult to be guarantee.From application point of view,attributing core calculation to patterns and motifs,and optimizing these motifs can produce reusable library that can support efficient develop new application,and also can guarantee the scalability of the application performance. A layered parallel computing model was used for guidance in this article. From the perspective of application-driven parallel program performance optimization, this article designed a new parallel multi-core processor computing modcl,which can be used in the architecture of multi core processor chip. Based on this model,g-scan algorithm was designed which has good extendibility together with high performance after analyzing and optimizing some fundamental parallel algorithms. At the last, newly designed parallel algorithm was applied to OpenSeesSP which is a finite element software widely used in structure engineering.
贸易地图生成软件并行处理方案的研究与实现
邵飞
计算机科学 , 2008,
Abstract: 本文通过分析贸易地图生成软件的主要特征,找出软件运行的性能瓶颈,在此基础上制定了适合该系统的基于参数扫描分析的并行处理方案,并且在集群运行平台上实现了这一并行处理方案。系统运行结果证实,该方案缩短了生成贸易地图的时间,改善了系统的整体性能。
Research of Grid Resource Monitoring Model Based on Mobile Agent
基于移动Agent的网格资源监控模型的研究*

FANG Juan,ZHANG Shu-jie,DI Rui-hu,HUANG He,<br>方娟,张书杰,,黄河
计算机应用研究 , 2004,
Abstract: Analysis and discuss the grid resource monitoring model based on mobile Agent.In this model,several advantages can be achieved,such as a reduction of network traffic of a reduction of dependency of network availability.Put forward the idea which combine the grid technologies with mobile agent technologies,it provide a new way to develop grid technologies.
Design and Implementation of Ontology Model Framework in Structural Engineering Semantic Grid
结构工程语义网格本体模型框架的设计与实现

WANG Li,WENG Zi-jun,SU Lin,DI Rui-hua,<br>王立,翁梓钧,苏琳,
计算机科学 , 2009,
Abstract: Concerned with the semantic conflicts during information integration and share in structural engineering,based on the related technique criterions of grid computing and semantic Web,this paper proposed the architecture of structural engineering semantic grid,on this basis,the paper focused on analyzing the semantics conflict from instance integration,schema integration,concept integration to query processing during the course of building semantics layer of Structure engineering semantics grid,furthermore,th...
大规模结构有限元分析程序在多核集群计算环境中的性能分析和优化
吕海,,
计算机科学 , 2012,
Abstract: 通过对基于mpi编程模型实现的开源有限元计算分析软件在多核集群计算平台中的程序性能的分析,找出程序瓶颈及其原因,实现了基于mpi编程模型的并行程序在多核计算环境中的性能优化。根据程序性能瓶颈的分析,提出了基于mpi/opcnmpi}合并行编程模型的大规模线性/非线性方程组求解和多线程多进程同时进行消息通信的两种程序性能优化方案。不同计算规模的实验结果表明,在多核集群计算平台中,mpi/openmp混合编程模型实现的大规模非线性方程组求解器相对于单纯基于mpi编程模型实现的并行程序,其性能有2倍到3倍的提升;多线程多进程同时消息传递的优化方案虽然对程序能够起到性能优化作用,但是对解决程序消息通信瓶颈的问题不是最好的方法。两个方案总体性能分析结果表明,基于mpi/openmp混合编程模型实现的并行程序,在多核集群计算平台中能够更好地发挥硬件系统的计算能力。
基于相对效费比的网格工作流调度算法
龙浩,梁毅,
计算机集成制造系统 , 2010,
Abstract: 为解决计算网格中有向无环图表示的截止期约束下的工作流时间费用优化问题,提出了一个新的启发式优化算法——相对效费比算法。该算法首先根据调度系数得到初步方案,再逐步调整,当方案完工时间小于截止期时,用时间换成本,选择成本消减最快的节点进行调整,中选服务有最大的正相对效费比值;当方案完工时间超过截止期时,用成本换时间,调整成本增加最慢服务的节点,中选服务有最大的负相对效费比值,该方法在保证截止期约束的同时能有效降低总成本。通过大量模拟实验和与最小关键路径、正向分层费用优化算法、逆向分层费用优化算法的比较,证明了相对效费比的有效性。
Property Weight Based Co-reference Resolution for Linked Data
基于属性权重的链接数据共指关系构建

张晓辉,蒋海,
计算机科学 , 2013,
Abstract: The construction and development of the Web of data are affected seriously by the loss of links amongsemantic datasets fromheterogeneousdata sources. The construction of co-reference between instances in semantic datasets will be helpful for enriching the links among datasets, which will improve the reasoning and query across datasets. The property weights and the similarities of property values play an important role in the co-reference resolution based on similarity analysis. This paper proposed a new model for obtaining the weights of properties from the statistical information of datasets, and proved its rationality theoretically. Furthermore, the advantages of this model compared with traditional method were analyzed. Based on the new method proposed by this paper, a system for building co-reference among semantic datasets was implemented, and the performance was verified with some open datasets.
应用驱动的并行程序性能优化研究
,蒋海,吕 海?
计算机科学 , 2013,
Abstract: 从应用角度出发,分析、归纳各种应用中的核心计算过程,利用符合多核处理器芯片架构的并行计算模型对这些核心计算过程进行优化,得出可以被重复利用的高性能可扩展的软件库,它既可以支持新应用的高效开发,也可以保证程序性能的可扩展性。以分层并行计算模型思想为指导,从应用驱动的并行程序性能优化的角度出发,首先提出了面向多核处理器芯片体系结构的并行算法设计模型,在此基础上对并行扫描算法进行分析优化,得出新的具有良好扩展性、高性能的g-scan算法。之后深入研究13种核心计算实体之一的稀疏线性代数计算实体,应用g-scan算法设计实现了新的稀疏矩阵一向量运算算法,并将其应用于结构工程领域中广泛使用的有限元分析,大大提升了其执行效率。
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