| 摘要 |
PURPOSE:To obtain the processor using rate in measuring period time by reading the counting value of processor unusing time by a timer interruption for the measuring period, in a processor using rate measuring system. CONSTITUTION:A processor 1 comes to be holding (HALT) condition when an instruction to be processed is not executed, and generates a signal HALT. While the signal is sent through an AND circuit 5 to a counting circuit 2 together with the clock pulse and at the circuit 2, while an HALT signal is sent from the processor 1, namely, while the processor 1 is not used, at the constant interval, the peripheral using time of the processor is counted based upon the clock pulse. On the other hand, a timer circuit 3 gives the interruption to the processor 1 for one constant period, and at such a time, the counting value of the circuit 2 is read. By the rate of the counting value and the interrupting period of the timer circuit 3, the unusing rate of the processor is calculated, the numeric of the unusing rate is extracted from the processor 1, and the average using rate of the processor in one measuring period time is obtained.
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