JPH03292540A - Diagnostic device for abnormality of computer - Google Patents

Abstract

PURPOSE:To smoothly and surely diagnose the abnormality of a computer of its own system through a computer of another system by reading and writing directly the data on a main memory of its own computer through the computer of another system. CONSTITUTION:A computer 1 of its own system is connected to a computer 2 of another system via a data way data communication circuit 3. The computer 2 is provided with a program which reads out the data on a main memory 5 of the computer 1 and diagnoses the computer 1. Then the computer 2 reads directly the data out of the memory 5 of the computer 1 based on its own program. Thus the computer 2 can surely diagnose the abnormality of the computer 1 regardless of the presence of a program working as a CPU load of the computer 1.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention connects a self-system computer and another system computer to each other via a data communication line, and transfers data stored in the main memory of the self-system computer to another computer. The present invention relates to a computer abnormality diagnosing device that directly reads and writes data from a system computer and diagnoses an abnormality in the own system computer using another system computer.

[Conventional technology]

FIG. 3 is an explanatory diagram of a conventional computer abnormality diagnosis device. In FIG.
) are interconnected via a data communication line (23).

The self-system computer (21) has a main memory (24).
A program storage unit (25) is provided for reading and writing data to and from the main memory, and the other computer (22) is provided with a main memory (26) and a program storage unit (25) for reading and writing data to and from the main memory. , a program storage unit (27) for processing writing is provided.

FIG. 4 is a flowchart for explaining the operation of the apparatus shown in FIG. 3, and the operation will be explained with reference to this flowchart. After the program stored in the program processing unit (25) and running at a high frequency is started, the program increments the data in the main memory (24) in step 5T11) and sends the data to the main memory of the other system computer (22) via the communication line (23). memory(
26).

On the other hand, the program storage unit (27) of the other system computer (22)
The program stored in the program storage unit (25)
Step 5T12) operates at a lower cycle than the program stored in the main memory (26) to read the data of the self-system computer (21) transmitted and written to the main memory (26), and compares the read data with the previous data (Step 5713). ), to judge whether they are the same or not (Step 5T14), if the data is the same without any change, the other system computer (22) diagnoses that the own system computer is abnormal (Step 5T15); if not, the own system computer It is diagnosed as normal and step 5T16) is performed. Then, the data written to the main memory (26) at this time is stored as the previous data (step 5T17).
).

[Problem to be solved by the invention]

Since the conventional computer abnormality diagnosis device is configured as described above, when many programs with higher priority than the data reading program of the main memory (24) are running in the own system computer (21), the data reading program is The operation goes into a waiting state, and data is not read from the main memory (24), and as a result, the other system computer (22)
) could be misdiagnosed as abnormal.

This invention was made with the aim of solving the above-mentioned problems, and it is possible to reliably diagnose abnormalities in the own computer on other computers without being affected by the CPU load of the own computer, that is, the program. The purpose is to do so.

[Means to solve the problem]

The computer abnormality diagnosis device according to the present invention is one in which a foreign computer is equipped with a program that reads data from the main memory of the local computer and diagnoses the local computer.

[Effect]

The computer abnormality diagnosis device according to the present invention allows the other computer to directly read data from the main memory of the own computer using its own program.
To make it possible to reliably perform abnormality diagnosis of a self-system computer on another system computer without being influenced by a program as a U load.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, the own system computer (1) and the other system computer (2) are interconnected by a data way "data communication line (3)".

The self-system computer (1) is a system control processing unit (4),
Main memory (5) including data reading section, basic processing unit (
6) has a DMA channel (7), which is connected to one end of the data way (3) via the DMA/PCCH bus (8), the terminal controller (9), and the loop coupler (10). It is connected.

In addition, the other system computer (2) is the system control processing unit (11
), main memory (12), basic processing unit (13), DM
A channel (14) and DMA channel (1
4) is the bus (15), terminal controller (16)
, is connected to the other end of the data way (3) via a loop coupler (17).

Next, the operation of the above embodiment will be explained. At the time of initial program loading (hereinafter abbreviated as IPL), the own computer (1) sends the address (address) of the data reading section in the main memory (5) and the data to the loop coupler (10) connected within the own computer. Write the size (number of bytes) and the number of its data part. Note that this data is reset when re-initialization occurs in the self-system computer (1).

The above data written to the loop coupler (10) is controlled by a loop controller (18) connected to the data way (3).

The data reading program of the other system computer (2) sends a request command to read the number of the data section of the data reading section of the own system computer (1) to the loop controller (18). The loop controller (18) sends the data set in the main memory (5) of the own computer (1) to the other computer (2) in accordance with the received request command.

Through the above processing, the other system computer (2) becomes the own system computer (1
) can read data from a specific part of the main memory (5).

Next, the determination processing of the other system computer (2) will be explained with reference to the flowchart of FIG.

As a result of the above processing, the other system computer (2) becomes the own system computer (1)
(Step 5)
TI), step 5T2), step ST to read the previous data from the previous data storage section in the other system computer (2)
The data read in step ST1 is compared with the previous data read in step ST2 (step ST3).

Next, it is determined whether both data are the same or not in step 5T4.
), if they are the same, the self-system computer (1) is diagnosed as abnormal (step 5T5), and if they are not the same, the self-system computer (1) is diagnosed as normal (step 576).

After the above diagnosis, the read data of the own system computer (1) is incremented. In other words, when the data overflows during the process of counting up numerical data by 1,
” (step 5T7). Then, the incremented data is stored as the previous data in the previous data storage section in the other system computer (2) (step 5T
8).

Further, the incremented data is written to the main memory (5) in the own system computer (1) (step 5T9), and the above processing operation is repeated.

In the above embodiment, the connection between computers is shown, but the connection between a computer and a microprocessor or between microprocessors may be used, and the same effects as in the above embodiment can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, data in the main memory of the own system computer is directly read/written from other systems computers, so that the data can be smoothly and This has the effect that abnormality diagnosis of the own system computer can be reliably performed by the other system computer.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a computer abnormality diagnosis device according to an embodiment of the present invention, FIG. 2 is a flowchart explaining judgment processing of other system computers, FIG. FIG. 4 is a flowchart explaining the operation of the apparatus shown in FIG. In the figure, (1) is the local computer, (2) is the other computer, (3) is the communication line, and (5) and (12) are the main memories. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] A program that connects a self-system computer and another system computer via a communication line, and directly reads data in a main memory provided in the self-system computer through the communication line to diagnose the self-system computer. A computer abnormality diagnosis device, characterized in that the computer abnormality diagnosis device executes the above in the computer of another system.