NAND Flash高速图像记录压力测试系统  

High speed NAND Flash image recorder load test system

作　　者：徐永刚[1,2] 任国强[1] 吴钦章[1] 吴威[1] 

机构地区：[1]中国科学院光电技术研究所,四川成都610209 [2]中国科学院大学,北京100049

出　　处：《红外与激光工程》2013年第10期2858-2864,共7页Infrared and Laser Engineering

基　　金：大科学工程国家遥感综合平台

摘　　要：为了测定NAND Flash图像记录系统的稳定性以及峰值记录速度指标，减少人工测试量，设计了压力测试系统。针对稳定性测试问题，设计了基于指数回归的速度压力模型和基于对数正态分布的测试时长控制模型；针对峰值记录速度测定问题，提出了基于爬山搜索算法和速率二分法的软硬件协同测试方法。基于有效数据占空比机制设计速率软件可调的硬件数据产生器，用爬山算法粗略确定峰值记录速度区间，再用速率二分法逼近峰值记录速度；系统测试报告通过串口和千兆网输出至上位机显示。实验结果表明：测试系统速度压力调整精度可达0.1 MB/s；速度压力范围为0~1600 MB/s；回读数据硬件检验无时钟延迟；被测NAND Flash记录系统挂载8片SLC NAND Flash芯片的峰值记录速度为240.12 MB/s，在200 MB/s速度压力下，可以连续工作24 h以上。测试系统架构为通用化设计，可以对其他传输和记录系统进行压力测试。In order to determine the stability of the NAND Flash image recorder and the peak recording speed, reducing the amount of manual testing, a new load test system was designed. To solve the problem of stability test, speed load model based on exponential regression and test time control model based on the lognormal distribution were proposed. To test the peak recording speed, the test methods combining hardware with software based on climbing search algorithm and speed dichotomy was praser. The hardware data generator was designed, whose speed was software adjustable according to valid data duty cycle mechanism. Climbing search algorithm rough determined the peak recording speed range, and then the speed dichotomy approached the peak recording speed; the test report was transferred to PC for display through the serial port and Gigabit Ethernet. Experimental results show that the speed load regulation accuracy is up to 0.1 MB/s; the speed load range is from 0 to 1 600 MB/s; verification of read back data using hardware has no clock delay; the tested NAND Flash recorder connecting with 8 SLC NAND Flash chips has the peak recording speed of 240.12 MB/s; under the speed load 200 MB/s, the NAND Flash record controller can work well continuously for more than 24 h. The load test system can be used for load test of other transmission and recording system because of its universal architecture.

关 键 词：图像记录 NANDFLASH 压力测试系统 稳定性 爬山搜索 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]