JPS6136662B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diagnostic device for a data processing device, and particularly to a diagnostic device for diagnosing input/output devices within the data processing device.

A conventional device of this type is shown in FIG. In the figure, 1 is a first main memory that stores data and a group of instructions, 2 is a first central processing unit that decodes and executes instructions retrieved from the first main memory 1, and 3 and 4 are external data readers. 5 and 6 are first and second output devices that send data to the outside, and 7 is the first and second input devices 3 and 4 or the first and second output devices. This is an input/output control device that controls input/output operations for 5 and 6, and the data processing system A is formed by the above configuration. In addition to this data processing system, a diagnostic processing system B consisting of the following components is formed. 8 is the first
A second main memory temporarily stores programs for diagnosing the main memory 1, the first central processing unit 2, and the input/output control unit 7; 2 central processing unit, 10
1 is an input/output device that reads data from the outside and sends data to the outside; 11 is an auxiliary storage device that stores diagnostic data temporarily stored in the second main storage device 8;

Next, the operation will be explained. First, the input/output control device 7 is input from the first input device 3 or the first input device 4.
A data processing program is stored in the first main storage device 1 through the first main storage device 1. The first central processing unit 2 retrieves an instruction from the first main memory 1, decodes it, and executes it. If the first central processing unit 2 decodes and executes an input command at a certain point, it issues an input/output operation start signal to the input/output control unit 7. The input/output control device 7 receives this input/output operation start signal, determines whether data can be read into the first input device 3 or the second input device 4, and if possible, reads the data into the first input device 3 or the second input device 4.
It reads data from the input device 4, transfers the data to the first central processing unit 2 or the first main storage device 1, and outputs an input operation end signal. On the other hand, if the input/output control device 7 determines that reading is not possible, it waits until it becomes possible.

The above is the operation when the first central processing unit 2 decodes an input command, but instead, when it decodes and executes an output command, it issues an input/output operation start signal to the input/output control unit 7. Upon receiving this input/output operation start signal, the input/output control device 7 retrieves data from the first central processing unit 2 or the first main storage device 1, and
It is determined whether data can be sent to the first output device 5 or the second output device 6, and if possible, the data can be sent to the first output device 5 or the second output device 6.
The data is transferred to the output device 5 or the second output device 6, and at this time, the first output device 5 or the second output device 6 sends the data to the outside. On the other hand, if the input/output control device 7 determines that sending is not possible, it waits until it becomes possible.

Data is processed in this manner, but if the first central processing unit 2 fails during the data processing, the input/output device 10 transmits a diagnostic command to the second central processing unit 9. The second central processing unit 9 loads the diagnostic program for the first central processing unit 2 from the auxiliary storage device 11 into the second main storage device 8 and starts executing it. This diagnostic result is then output to the input/output device 10.

Such diagnostic operation is similarly performed when the first main storage device 1 or the input/output control device 7 fails.

On the other hand, if the first input device 3 fails, for example, a diagnostic program is loaded from the outside into the first main storage device 1 via the second input device 4, and this diagnostic program is loaded into the first central processing unit 2. Decipher and execute. Then, the diagnostic result is outputted to the first output device 5 or the second output device 6.

Conventional diagnostic equipment for data processing equipment is configured to use the central processing unit of the data processing system for the purpose of data processing to diagnose when an input/output device has failed as described above. There was a drawback that data processing could not be performed even if data processing was possible using other normal devices.

The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional technology, and is capable of processing data by using an input or output device other than the failed input or output device when an input or output device fails. It is an object of the present invention to provide a diagnostic device for a data processing device that can diagnose failed input or output devices in parallel.

An embodiment of the present invention will be described below with reference to FIG. 2, in which parts corresponding to those in FIG. 1 are denoted by the same reference numerals.
In FIG. 2, data processing system A has the same configuration as described above with respect to FIG. 1, and diagnostic system B has the same second main storage device 8, second central processing unit 9, and It has an input/output device 10.

In addition to this, the diagnostic system B includes the first main storage device 1,
Not only the first central processing unit 2 and the input/output control device 7, but also all the devices forming the data processing system A, such as the first input device 3, the second input device 4, the first output device 5, and the second output device 6. an auxiliary storage device 15 for storing a diagnostic program; a first input device 3;
A third main storage device 16 temporarily stores diagnostic program data of the second input device 4, first output device 5, and second output device 6, and a group of instructions retrieved from the third main storage device 16 is decoded and executed. It has a third central processing unit 17.

In the configuration of FIG. 2, data processing in the data processing system A is performed by the first or second input device 3 or 4 via the input/output control device 7 in the same manner as described above with respect to FIG. 1 Main storage device 1
The first central processing unit 2 executes the program based on the program stored in the first central processing unit 2, and the processing results are sent to the outside by the first or second output device 5 or 6.

During the processing of this data, the input/output control device 7, the first main storage device 1, excluding the input and output devices,
When a failure occurs in the first central processing unit 2, the auxiliary storage device 15 is diagnosed based on the diagnostic instruction transmitted from the input/output device 10 to the second central processing unit 9 in the same manner as described above with reference to FIG. By loading the program into the second main storage device 8 via the second central processing unit 9, a diagnosis is executed by the second central processing unit 9, and the diagnosis result is transmitted externally by the input/output device 10. sent to.

On the other hand, when the input devices 3, 4 or the output devices 5, 6 are out of order, diagnosis is performed as follows.

For example, if the first output device 5 breaks down,
The input/output device 10 receives a second diagnosis instruction from the outside.
A diagnostic instruction regarding the first output device 5 is transmitted to the central processing unit 9, and the third central processing unit 17 loads the diagnostic program regarding the first output device 5 from the auxiliary storage device 15 into the third main storage device 16, and The central processing unit 17 decodes and executes the data. The diagnosis result of the first output device 5 is outputted from the second central processing unit 9 to the auxiliary storage device 15 or the input/output device 10.

Such diagnosis is similarly executed even when the first input device 8, first input device 4, and second output device 6 are out of order.

In the above-described embodiment, a case has been described in which the diagnostic program is stored in the auxiliary storage device 15 and loaded into the second main storage device 8 or the third main storage device 17 as necessary. The auxiliary storage device 15 may be omitted by storing the data in the device 8 or the third main storage device 16 in advance. Also, the third main storage device 1
Even if the role of 6 is performed by the second main storage device 8, the same effect as in the above embodiment can be obtained.

As described above, according to the present invention, diagnosis of input devices and output devices can be performed without occupying the data processing system, so diagnosis can be performed without reducing the operating rate of the data processing system, and the diagnostic device can be made at low cost. Moreover, a diagnostic device for a data processing device with high diagnostic accuracy can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional diagnostic device for a data processing device, and FIG. 2 is a block diagram showing an embodiment of the diagnostic device for a data processing device according to the present invention. 1: first main storage device, 2: first central processing unit,
3: first input device, 4: second input device, 5: first
output device, 6: second output device, 7: input/output control device, 8: second main storage device, 9: second central processing unit, 10: input/output device, 11, 15: auxiliary storage device, 16: second 3 main storage device, 17: third central processing unit.

Claims (1)

[Claims] 1. A first storage device, and a first storage device that processes data based on a program stored in the first storage device.
a central processing unit, first and second input devices that read data from the outside, first and second output devices that send data to the outside, the first and second output devices, and the first and controls reading of data from the second input device and data transfer of the data to the first main storage device, outputs an input operation end signal when the input operation is completed, and transfers the data from the first main storage device to the first and second main storage devices. and an input/output control device that controls data retrieval and data transfer to a second output device and outputs an output operation end signal when the output operation ends, the first and second input devices, the first and a second output device, the first main storage device, the first
A central processing unit, an auxiliary storage device that stores a diagnostic program for the input/output control device, a third main storage device that temporarily stores the diagnostic program in the auxiliary storage device, and a group of instructions stored in the third main storage device. a third central processing unit that decodes and executes the above; a second main storage unit that temporarily stores a diagnostic program in the auxiliary storage unit and a program that controls the third central processing unit; a second central processing unit that diagnoses the first main memory circuit, the first central processing unit, and the input/output control unit and controls the third central processing unit based on a stored program; A diagnostic device for a data processing device, comprising an input/output device that reads and sends data. 2. A diagnostic device for a data processing device according to claim 1, wherein a diagnostic program for the auxiliary storage device is stored in the second or third main storage device.