嵌入式异构多核处理器核间的通信性能评估与优化  

Performance Evaluation and Optimization of Inter-cores Communication for Heterogeneous Multi-core Processor Unit

作　　者：罗殊彦 朱怡安[1] 曾诚 LUO Shu- yan, ZHU Yi- an, ZENG Cheng(School of Computer Science,Northwestern Polytechnical University,Xi＇an 710072,Chin)

机构地区：[1]西北工业大学计算机学院,西安710072

出　　处：《计算机科学》2018年第B06期262-265,274,共5页Computer Science

基　　金：航空科学基金(20150753010);民机专项(XJZ-2015-D-76);陕西省重点研发计划重大重点项目(2016MSZD-G-8-1)资助

摘　　要：随着嵌入式技术的不断发展,越来越多的平台采用异构多核处理器(Heterogeneous Multi-Processor Unit,HMPU)进行高性能计算,但多核处理器的核间通信效率严格地制约着系统的高性能计算能力。针对HMPU的核间通信性能难以量化的问题,提出了基于通信粒度、通信缓存和消息传输机制的阶段评价模型,并通过实验验证了这3个影响因子对不同阶段的核间通信性能的影响。此外,由于嵌入式系统环境多变、资源有限,使得静态通信策略对系统性能优化具有局限性。针对该问题,提出了基于系统内存约束、时间约束和性能目标的动态通信策略优化模型(Dynamic Communication Strategy Optimization Model,DCSOM)。通过实验证明:在数据量较小、通信周期较长的异构多核处理器中,DCSOM更具优越性。With the continuous development of embedded technology,more and more systems conduct high performance computing by using heterogeneous multi-processor units（HMPU）,but the efficiency of inter-processor communication seriously restricts the system capabilities of high performance computing.This paper presented a stage-oriented assessment model based on three influence factors including communication granularity,communication cache and message transmission mechanism against the problem of hardly quantifying the performance of inter-processor communication.Besides,the influence of performance of the inter-processor communication on different stages has been proved by experiments.Due to the changeable environment and limited resources of embedded system,the static communication strategy has limitations on system performance optimization.In order to solve this problem,this paper raised the dynamic communication strategy optimization model（DCSOM）based on the memory constraints,time constraints and performance goals.It is proved by experiments that dynamic communication strategy has more advantages in multi-core processing units of a small amount of data and long period.

关 键 词：异构多核处理器 核间通信 性能评价模型 动态通信策略优化模型 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]