基于十亿亿次国产超算系统的流体力学软件众核适应性研究  

Research on Adaptation of CFD Software Based on Many-core Architecture of 100P Domestic Supercomputing System

作　　者：李芳[1] 李志辉[2] 徐金秀[1] 范昊[1] 褚学森[3] 李新亮[4] LI Fang;LI Zhi-hui;XU Jin-xiu;FAN Hao;CHU Xue-sen;LI Xin-liang(Jiangnan Institute of Computing Technology,Wuxi,Jiangsu 214083,China;National Laboratory of Computational Fluid Dynamics,Beijing 100191,China;China Ship Scientific Research Center,Wuxi,Jiangsu 214081,China;Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]江南计算技术研究所,江苏无锡214083 [2]国家计算流体力学实验室,北京100191 [3]中国船舶科学研究中心,江苏无锡214081 [4]中国科学院力学研究所,北京100190

出　　处：《计算机科学》2020年第1期24-30,共7页Computer Science

基　　金：载人航天工程技术课题(2018-14);国家自然科学基金重大研究计划(91530319);国家重点基础研究发展计划(2014CB744100)~~

摘　　要：国产众核处理器提供了两种移植难度相差较大的众核级并行编程语言。不同流体力学软件对众核架构适应性的不同,决定了它们在移植优化过程中适合于不同的编程语言。首先介绍了国产众核处理器的体系结构、编程模型和并行编程语言;然后分析了流体力学软件应用于国产众核处理器存在的挑战性问题,包括隐格式带来的数据相关性、大型稀疏矩阵线性代数方程组求解、多重网格方法和非结构网格等,这些问题限制了软件对众核架构的适应性。文中针对这些难题分别提出了创新的优化算法,并通过理论分析和实验得到了几种典型流体力学软件的众核适应性研究结论。实践证明,多数流体力学软件对国产众核处理器的适应性良好,能够采用OpenACC编译器自动移植,并扩展到百万核并行规模,能保持较高的并行效率。Domestic many-core super computing system provides two program languages with different program difficulty.Adaptation to many-core architecture of CFD software decides which program language should be used.Firstly,this paper briefly introduced the many-core architecture,program model and program languages.And then challenges on the adaptation of CFD software were analyzed,including data relativity of implicit method,solving of big parse linear equations,many grid method and unstructured grids.For each challenge,corresponding countermeasure was provided too.At last,the paper provided the speedup ratio of some typical software of fluid dynamics based on theory analysis and experiments.Facts prove that most CFD softwares adapt well to domestic many-core architecture and can use simple program language to get better parallel ration on million cores.

关 键 词：国产 众核架构 流体力学软件 适应性 编程语言 并行算法 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]