基于新型非易失存储器的混合内存架构的内存管理机制  

Memory Management Mechanism for Hybrid Memory Architecture Based on New Non-volatile Memory

作　　者：李琪 钟将[2] 李雪[3] 李青[2] LI Qi;ZHONG Jiang;LI Xue;LI Qing(School of Computer Science and Technology,Huaiyin Normal University,Huaiyin,Jiangsu 223300,China;College of Computer Science,Chongqing University,Chongqing 400044,China;School of Information Technology and Electrical Engineering,University of Queensland,Brisbane 4072,Australia)

机构地区：[1]淮阴师范学院计算机科学技术学院,江苏淮阴223300 [2]重庆大学计算机学院,重庆400044 [3]昆士兰大学信息技术与电子工程学院

出　　处：《电子学报》2019年第3期664-670,共7页Acta Electronica Sinica

基　　金：国家重点研发计划(No.2017YFB1402400);重庆市社会事业与民生保障科技创新专项(No.cstc2017shmsA0641);国家863计划项目(No.2015AA015308);重庆市重点产业共性关键技术创新专项(No.cstc2017zdcy-zdyxx0047);重庆市技术创新与应用示范(产业类重点研发)项目(No.cstc2018jszx-cyzdX0086);中央高校项目(No.2018CDYJSY0055)

摘　　要：随着互联网和云计算技术的迅猛发展,现有动态随机存储器(Dynamic Random Access Memory,DRAM)已无法满足一些实时系统对性能、能耗的需求.新型非易失存储器(Non-Volatile Memory,NVM)的出现为计算机存储体系的发展带来了新的契机.本文针对NVM和DRAM混合内存系统架构,提出一种高效的混合内存页面管理机制.该机制针对内存介质写特性的不同,将具有不同访问特征的数据页保存在合适的内存空间中,以减少系统的迁移操作次数,从而提升系统性能.同时该机制使用一种两路链表使得NVM介质的写操作分布更加均匀,以提升使用寿命.最后,本文在Linux内核中对所提机制进行仿真实验.并与现有内存管理机制进行对比,实验结果证明了所提方法的有效性.With the rapid development of internet and cloud computing technology,the existing dynamic random access memory(DRAM) have been unable to meet the requirements of performance and energy consumption of some real time systems.The emergence of non-volatile memory(NVM) have shown great potential for the development of the computer storage architecture.This paper proposes a kind of efficient memory page management mechanism based on the hybrid NVM and DRAM memory architecture.The main idea of this mechanism is to save the data pages with different access characteristics in the appropriate memory space according to the characteristics of different memory media,to reduce the number of system migration operations and improve the system performance.At the same time,the mechanism uses an efficient wear-leveling algorithm to improve NVM’s lifetime.Finally,the experimental results show that the proposed method is effective.

关 键 词：非易失存储器 磨损均衡 内存计算 混合内存 

分 类 号：TP333[自动化与计算机技术—计算机系统结构]