| 多通道并行访问模式下的闪存静态损耗均衡设计 |
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| 引用本文： | 王伟能,倪凯,马建设,王宗超,赵诣,潘龙法.多通道并行访问模式下的闪存静态损耗均衡设计[J].清华大学学报(自然科学版),2011(11):1616-1620. |
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| 作者姓名： | 王伟能 倪凯 马建设 王宗超 赵诣 潘龙法 |
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| 作者单位： | 清华大学精密仪器与机械学系; |
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| 基金项目： | 东莞市重点项目(200910814003) |
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| 摘 要： | 静态损耗均衡算法决定了固态闪存存储系统的使用寿命。为了提高多通道并行访问模式下的闪存系统寿命,提出了一种主动搬移静态数据的静态损耗均衡设计。该设计在多通道并行访问模式下,根据擦除标志位,采用轮询法主动挑选静态数据块并加入待擦除块队列,从而减小各物理块之间的损耗不均衡程度。实验结果表明:该设计能提高平均擦除次数至少8.33%,有效降低并行访问模式下的损耗不均衡程度至少5.39%。该文还对影响损耗均衡程度的触发阈值进行了分析,提出了在选择触发阈值时,需要综合考虑损耗均衡情况和系统速度。
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| 关 键 词： | 闪存存储系统 静态损耗均衡算法 多通道并行访问 触发阈值 |
Static wear leveling design of flash memory in multi-channel parallel access mode |
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| WANG Weineng,NI Kai,MA Jianshe,WANG Zongchao,ZHAO Yi,PAN Longfa.Static wear leveling design of flash memory in multi-channel parallel access mode[J].Journal of Tsinghua University(Science and Technology),2011(11):1616-1620. |
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| Authors: | WANG Weineng NI Kai MA Jianshe WANG Zongchao ZHAO Yi PAN Longfa |
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| Institution: | WANG Weineng,NI Kai,MA Jianshe,WANG Zongchao,ZHAO Yi,PAN Longfa(Department of Precision Instruments and Mechanology,Tsinghua University,Beijing 100084,China) |
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| Abstract: | Static wear leveling algorithms are used to determine the lifetime of solid-state flash memory storage systems.The lifetime of flash memory in the multi-channel parallel access mode can be prolonged by a static wear leveling design that proactively moves static data.The design actively picks out blocks with static data using a polling method based on the erase flag and adds them to the block queue to be erased to level the wear on different physical blocks.Tests show that the design increases the average nu... |
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| Keywords: | flash memory storage systems static wear leveling algorithm multi-channel parallel access trigger threshold |
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