闪存循环位图的损耗均衡机制研究  

Research on wear-leveling mechanism of circle bitmap for flash memory

作　　者：刘智朋[1] 罗洪元[1] 阳小珊[1] 邱全伟[2] 郑良[2] 

机构地区：[1]中国电子科技集团公司第十五研究所国家电子计算机质量监督检验中心,北京100083 [2]中国传媒大学存储实验室,北京100024

出　　处：《计算机工程与设计》2013年第2期523-528,共6页Computer Engineering and Design

基　　金：国家863高技术研究发展计划基金项目(2009AA01A405)

摘　　要：为了提高闪存的寿命,提出了闪存寿命的数学表达式,研究了闪存寿命和损耗均衡机制的关系。通过研究现有的均衡损耗机制,设计了一种新的闪存循环位图的损耗均衡机制。在传统的系统架构,加入循环位图从而得到一种新的系统架构。通过动态写入和静态回收两个阶段详细描述了该机制的基本工作流程和方法。最后通过性能分析,证实该机制能够显著提高闪存物理块的损耗均衡程度,因此具有一定的应用价值。To improve the flash memory lifetime, the mathematical expression of the flash memory lifetime is presented. The relation ship between the flash memory lifetime and the wearqeveling mechanism is studied. By researching the existing wearleveling mechanisms, a new wearleveling mechanism based on the circle bitmap is designed. Based on the traditional system architec tures, a new system architecture which includes a circle bitmap is designed. Through the dynamic writing and the static recycling phases, the basic working processes and methods of the new mechanism are introduced. That the mechanism improves the effi ciency of the wearleveling level of the blocks by the performance analysis is found, so it could be applied to the practical applica tions.

关 键 词：闪存 闪存寿命 损耗均衡机制 循环位图 静态控制指针 动态控制指针 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]