| 摘要 |
PURPOSE:To design high performance hardware and software by displaying output signals outputted from both of an instruction execution time measuring circuit and a bus occupation ratio measuring circuit on a display device through an analytical display program. CONSTITUTION:The instruction execution time measuring circuit 3 measures the number of instructions to be executed by a CPU 2 and the execution time of the CPU 2 for a target hardware 1 to be developed or evaluated. On the other hand, the length and interval of a bus cycle are measured by the bus occupation ratio measuring circuit 4 and the display device 5 to measure the bus occupation ratio. The CPU 2 executes a program to be developed or evaluated and acts on the target hardware 1. Thereby, the circuit 3 measures the number of instruction executions per unit time and the instruction execution time, and the circuit 4 measures the using capacity, i.e. the bus occupation ratio, in each bus unit. An analyzed result is displayed on the display device 5 through an analyzed result display program based upon the two measured values, so that the performance of the hardware and software can be easily obtained. |
