异构高性能计算系统Linpack效率受限因素分析  

Analysis of the factors limiting Linpack efficiency of heterogeneous high-performance computing systems

作　　者：贾迅 邬贵明 谢向辉 

机构地区：[1]数学工程与先进计算国家重点实验室,江苏无锡214125

出　　处：《计算机工程与科学》2018年第2期224-230,共7页Computer Engineering & Science

基　　金：国家自然科学基金(91430214)

摘　　要：能耗是目前高性能计算系统性能提升的一大挑战。主处理器连接加速器的异构计算技术可以有效提升系统能效,因而被广泛应用于当前高性能计算系统的设计。同等系统规模下,异构计算系统的Linpack效率普遍低于同构系统。针对这一问题,从结构设计的角度,基于真实计算系统的设计参数和性能数据,分析了大规模异构高性能计算系统Linpack效率受限的主要因素及其对结构设计的需求,并构建了针对异构计算系统的Linpack性能模型对分析结论进行了验证。研究成果对异构计算系统Linpack的性能优化以及未来高效异构架构的设计具有一定的指导意义。Energy consumption is a major challenge for current high-performance computing（HPC）system design.The technique of heterogeneous computing with accelerators connected to host processor can improve the system energy efficiency,and has been widely applied in HPC.However,heterogeneous systems have lower Linpack efficiency in comparison to homogeneous systems with the equivalent scale.Aiming at this problem,from the perspective of structural design,based on the design parameters and performance data of real computing systems,this paper analyzes the main factors limiting the Linpack efficiency of heterogeneous HPC systems and their demands of structural design.Besides,the analysis is verified with a Linpack performance model tailored for heterogeneous systems.This study results are of guiding significance to Linpack performance optimization and efficient architecting on future heterogeneous systems.

关 键 词：异构 高性能 LINPACK 效率 

分 类 号：TP303[自动化与计算机技术—计算机系统结构]