Test and Analysis of Computer HDD I/O Operation

Computer HDD I/O operation was abstracted as an M/M/1 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.