JPS5665384A - Information processor - Google Patents

Abstract

PURPOSE: To calculate a HIT ratio by providing an information processing unit, equipped with a high-speed buffer memory, with a readable counter that integrating read memory requests, a readable counter that finds the frequency that read memory requests hit the high-speed buffer memory, and FF for count period control.

CONSTITUTION: When high-speed buffer memory 2 is accessed and hit by address signal 1a from a address register 1, memory signal 2a turns into 1. The 1st AND circuit 4, when three conditions of count control signal 3a, memory signal 2a and read memory request signal 6 of FF3 are satisfied, allows bit frequency integrating counter 7 to count up by one. The 2nd logic circuit 5, when two conditions of count control signal 3a and read memory request signal 6 are satisfied, allows read memory request frequency integrating counter 8 to count up by one. Outputs 7a and 8a of counters 7 and 8 are sent to data bus to calculate HIT ratios. Consequently, the HIT ratio of the high-speed buffer memory in a period when the measurement is desired can be calculated.

COPYRIGHT: (C)1981,JPO&Japio