JPH04358244A - Bus use rate measuring system - Google Patents

Abstract

PURPOSE:To measure the use rate of a system bus in a short period by integrating a circuit for measurement control, counter and real-time timer into an information processor. CONSTITUTION:The system is composed of an operating state detection circuit 10 to detect the operating state of a system bus 1, measurement control circuit 11 to control the start/stop of a measurement counter 15, start time display register 12 and stop time display register 13 which respectively display the start time and the stop time of the measurement according to a real-time timer 14 and further, a measurement mode designation register 16 may be also provided to select and control the contents of the operation mode of the system bus 1.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus usage rate measurement method, and more particularly to a system bus usage rate measurement method.

0002

2. Description of the Related Art Conventionally, this type of system bus usage rate measurement has not been built into an information processing device, and when measurement is desired, a counter is attached externally.

0003

[Problem to be Solved by the Invention] In the above-mentioned method, since all the necessary signals for measurement do not exist, measurement is performed by adding an external measurement circuit and then connecting a counter. The problem was that it was easy to spend a lot of time on the process.

0004

[Means for Solving the Problems] The bus usage rate measurement method of the present invention includes an operating state detection circuit that detects the operating state of a system bus, a system bus that stores a real-time timer value according to instructions from a microprogram, and a system bus that detects the operating state of a system bus. A measurement control circuit that instructs and controls the start and stop of a measurement counter that counts bus operation time, a start time display register that stores the real-time timer value in response to a measurement start instruction from the measurement control circuit, and a measurement control circuit that In response to a measurement stop instruction, the system bus operation signal is input from the stop time display register that stores the real-time timer value and the operating state detection circuit, and the system bus operation signal is input from the measurement control circuit. It is equipped with a measurement counter that starts counting time and stops counting when instructed to stop measurement.

Furthermore, in order to measure the bus usage rate under various conditions, a measurement mode designation that stores information for selecting and controlling the operation contents to be detected as a system bus operation signal from among the operation contents of the system bus is provided. Equipped with a register.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

Reference numeral 1 denotes a system bus (hereinafter referred to as S-bus), to which a main storage device, central processing unit, input/output device, and diagnostic device are connected, although not shown, and memory access operations are performed by each device. , an interprocessor communication operation is performed.

The operating state detection circuit 10 constantly monitors the S-bus 1 and outputs an S-bus operating signal 22 if the S-bus 1 is operating.

The measurement control circuit 11 is controlled by a microprogram and outputs a measurement start instruction signal 21 or a measurement stop instruction signal 20.

The real time timer 14 is a timer that displays the current real time.

When the start time display register 12 receives the measurement start instruction signal 21, the value of the real time timer 14 is stored therein.

When the stop time display register 13 receives the measurement stop instruction signal 20, the value of the real time timer 14 is stored.

The measurement counter 15 constantly monitors the S-bus operation signal 22, and upon receiving the measurement start instruction signal 21,
It is a counter that measures the time that the S-bus operation signal 22 is valid, and when it receives the measurement stop instruction signal 20,
Stop measurement.

The measurement mode designation register 16 has various S
- For each bus operation, the S-bus operation signal 22 is controlled to be sent or not to be sent.
Measurement of time during bus operation, S-Measurement of time during bus operation, and S-measurement of time during bus operation only from the central processing unit
- A register that stores information for selectively controlling the operation contents to be detected as a bus operation signal, and provides an operation mode signal 30 to the operation state detection circuit 10. Note that the measurement mode designation register may not exist.

Next, a method for measuring the S-bus usage rate will be explained.

The contents of the start time display register 12, stop time display register 13, and measurement counter 15 can be referenced by a microprogram.

In response to the measurement start instruction signal 21, the value of the real time timer 14 is stored in the start time display register 12, and this value is designated as m.

The measurement counter 15 also receives the measurement start instruction signal 21.
Thus, only the valid time of the S-bus operation signal 22 is counted, and the counting is continued until the measurement stop instruction signal 20 is received, and the value counted until the measurement stop instruction signal 20 is received is set as a.

The value of the real time timer 14 is stored in the stop time display register 13 by the measurement stop instruction signal 20, and if this value is n, then from the values of m, n, and a, the S-bus usage rate is calculated as a÷( n-
It can be obtained by the formula: m)×100(%).

[0021]

Effects of the Invention As explained above, the present invention enables the S-
It has a measurement counter that counts the time during bus operation and a start time display register that stores the real time timer value.
It has a stop time display register that stops counting the S-bus operating time and stores the real-time timer value in response to a measurement stop instruction, and processes the values of the measurement counter, start time display register, and stop time display register using a microprogram. This has the effect of increasing the bus usage rate in a short period of time.

Furthermore, by having a measurement mode designation register that stores information for selecting and controlling the operation contents to be detected as the S-bus operation signal among the S-bus operation contents, various types of operation under various S-bus operations can be performed. This has the effect of obtaining the bus usage rate of the operating mode.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

[Explanation of symbols]

1 System bus 10　　　　　Operating status detection circuit 11 Measurement control circuit 12 Start time display register 13 Stop time display register 14 Real time timer 15 Measurement counter 16 Measurement mode specification register 20 Measurement stop instruction signal 21 Measurement start instruction signal 22 S-bus operating signal 30 Operation mode signal

Claims (2)

[Claims] 1. An operating state detection circuit that detects the operating state of the system bus; and, according to instructions from a microprogram, stores a real-time timer value and starts counting a measurement counter that counts the operating time of the system bus; A measurement control circuit instructs and controls the stop, a start time display register that stores the real-time timer value in response to a measurement start instruction from the measurement control circuit, and a start time display register that stores the real-time timer value in response to a measurement stop instruction from the measurement control circuit. Inputs the system bus operating signal from the stop time display register that stores the value and the operating state detection circuit, starts counting the system bus operating time in response to a measurement start instruction from the measurement control circuit, and
A bus characterized in that it has a measurement counter that stops counting in response to a measurement stop instruction, and obtains the usage rate of the system bus as a ratio of the measurement counter value within the difference between the display values of the stop time display register and the start time display register. Utilization measurement method 2. A measurement mode specifying register that stores information for selecting and controlling the operation contents to be detected as a system bus operation signal from among the operation contents of the system bus, and for the operation state detection circuit. 2. The bus usage rate measuring method according to claim 1, wherein transmission of the system bus operation signal is controlled depending on the operation mode.