计算机硬盘I/O操作性能测试与分析  

Test and Analysis of Computer HDD I/O Operation

作　　者：陈飞云[1] 龙风[2] 

机构地区：[1]上海应用技术学院计算机科学与信息工程系,上海200235 [2]中国科学院合肥物质科学研究院等离子体物理研究所,合肥230031

出　　处：《化工自动化及仪表》2010年第2期73-77,共5页Control and Instruments in Chemical Industry

基　　金：国家发展计划委员会"投资(1998)1303号项目"(子项目)

摘　　要：首先将硬盘I/O操作过程抽象为一个M/M/1排队模型;然后利用排队系统相关理论对硬盘I/O操作响应性能进行理论分析,并推导出系统中平均任务数、队列中平均任务数以及平均响应时间等参数计算公式;最后通过对实际测试数据的计算分析,给出硬盘I/O操作对控制系统的实时运行的具体干扰力;并在文章最后提出一种解决措施。测试分析证明,硬盘I/O操作是高代价的操作,会影响控制系统的实时运行。Computer HDD I/O operation was abstracted as an M/M/I queuing model and the running performance of HDD I/O operation was analyzed by using queuing system correlation theory. Some parameters computing formulas were derived such as mean tasks in whole system, mean tasks in a queuing and mean response time. Used those formulas, some data acquired by experiments were computed and analyzed. Proved by some experiments, HDD I/O operation is a high cost operation, which will influence running performance of a control system. Finally, a resolved method is given to reduced the influence which made by HDD I/O operation.

关 键 词：实时控制系统 M/M/1排队模型 硬盘I/O操作 系统性能分析 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]