AFTL:一种基于高级指令的闪存转换层  

AFTL:A Flash Translation Layer Based on Advanced Operations

作　　者：杨明伟[1,2] 李亚晖[1,2] 赵益民[1,2] 蔡晓乐 

机构地区：[1]中航工业西安航空计算技术研究所,陕西西安710068 [2]机载弹载计算机航空科技重点实验室,陕西西安710068

出　　处：《微电子学与计算机》2017年第1期15-20,共6页Microelectronics & Computer

基　　金：航空基金资助项目(2013ZC31005)

摘　　要：为了对多层次并行固态盘提供的多种并行性进行高效利用,提出一种基于冷热数据的FTL算法:AFTL,通过对高级指令多分组指令(multi-plane)和交错指令(interleave)的使用,达到并行性利用的最大化,冷热数据识别与内部数据迁移指令(copy-back)、多分组擦除指令的结合则大大降低了垃圾回收的成本,两者的组合最终使得整体性能获得进一步提升.仿真结果显示,在多种负载、多种不同通道数的情况下,相对于同样综合利用多种并行性的动态FTL算法,写响应时间平均减少15.3%,相对于DLOOP算法,写响应时间平均减少78.9%.In this research,we proposed a new page mapping FTL called AFTL in order to fully take advantage of several parallelism provided by multi-level parallel solid-state disk.Through using multi-plane operations and interleave operations,AFTL achieves the goal to exploit the parallelism effectively,meanwhile the combination of identification of hot-cold data,copy-back operation and multi-plane-erase operation decreases the cost of garbage collection a lot,all the factors make the performance get largely promoted.The experimental results show that under the several real world workloads with different channel number,AFTL decreases the write response time15.3% and 78.9% respectively compared with existent FTL which also exploit multi-level parallelism and DLOOP.

关 键 词：闪存 FTL 并行性 高级指令 垃圾回收 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]