EVALUATION SYSTEM FOR COMPUTER MEMORY READ PERFORMANCE

摘要

PROBLEM TO BE SOLVED: To compare main memory read-in performance by increasing or decreasing the busy rates of the buses and switches of a computer by sequentially writing data to a main memory device and measuring the needed time. SOLUTION: A data read-in execution and elapsed time measuring means 183 and a bus or switch busy rate varying means 184 of each measurement process 181 are read in data of a certain number of bytes from the main memory device 130 or cache memory devices 112 and 113 successively M times. The means 184 varies a main memory read-in frequency M in every unit time. Each process 181 calculates the time T needed to read in the data M times. A measurement data editing and graphing means 186 calculates the memory read-in time and the busy rate of the buses or switches from the mean value of measurement results T. Thus, the busy rate of the buses or switches between a processor 111 and main memory device 130 is varied to measure the memory read-in time.