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.
出处
《计算机工程与设计》
CSCD
北大核心
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)
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
flash memory
flash memory lifetime
wear-leveling mechanism
circle bitmap
static control pointer
dynamiccontrol pointer
