Browse Prior Art Database

Processor Speed Measurement

IP.com Disclosure Number: IPCOM000114002D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Mosley, J: AUTHOR

Abstract

Disclosed is a method for providing the user and manufacturer of a computer system with a measurement of the current speed of a processor within the system, when the speed of the processor is varied to provide optimum performance.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 54% of the total text.

Processor Speed Measurement

      Disclosed is a method for providing the user and manufacturer
of a computer system with a measurement of the current speed of a
processor within the system, when the speed of the processor is
varied to provide optimum performance.

      Fig. 1 is a block diagram of an auto clock generator circuit
10, which may be built as a part of a processor chip to control the
clock speed of the processor.  The rate of oscillation through auto
clock generator circuit is determined by the length of time required
for a signal pulse to travel around the circuit, through a number of
invertors 12, each of which provides an associated time delay [*].
As shown, the circuit can be built in several different ways,
providing various paths 14 through different numbers of invertors.
Since this oscillator circuit is built as a part of the processor
chip, its speed reflects the speed of other circuits within the
processor.  Also, the speed of the oscillator circuit increases with
decreases in the operating temperature of the chip.

      Fig. 2 is a block diagram of a method for measuring the
performance of a processor chip having the auto clock generator of
Fig. 1.  The frequency developed by auto clock generator 10 is
compared with the frequency of a time of day clock oscillator 16,
which is required in the system for other purposes, such as the
operation of a time of day clock.  This comparison is done in a
frequency compare circuit 18, which may b...