JPH0341528A - Diagnostic device in computer - Google Patents

Abstract

PURPOSE:To make it possible to use a diagnostic device for a computer to be used for a full day and to prevent the efficiency of execution from being lowered by sequentially executing computing operation based upon a diagnostic microprogram only during the interlock of an operation part. CONSTITUTION:When a normal microprogram 7 is being executed, a diagnostic control part 10 detects the interlock of the operation part 1 in the computer 5 which is generated at the time of accessing a main storage device 3 from the operation of an access part 4 and switches a selection part 11 to the side of the diagnostic microprogram 6. At this time, the contents of a working regis ter 2 in the computer are held in a working register holding part 13, data stored in a diagnostic data storing part are computed by the diagnostic microprogram and the computer result is stored in a computed result storing part 14. The operation is sequentially executed only during the interlocking of the operation part, and when the interlock of the operation part is ended, the data stored in the working register are returned to the working register and the normal program is restarted again. Thus, the diagnostic device can be used for the computer to be used for a full day and the lowering of the execution efficiency can be prevented.

Description

[Detailed Description of the Invention] (Summary) A microprogram storage section that stores a diagnostic microprogram and a normal microphrogram, a diagnostic data storage section that stores diagnostic data necessary for diagnosis, and a diagnostic microprogram storage section that stores diagnostic data necessary for diagnosis. A diagnostic device for a computer that is equipped with a control unit that causes the computer to execute calculations based on the diagnostic data according to a program, which can be used in a computer that operates 24 hours a day, and can perform diagnostics without reducing the execution efficiency of the user program of the computer. a selection section for selecting between a diagnostic microprogram and a normal microprogram;
A diagnostic control unit that detects an interlock in the computer's arithmetic unit that occurs when accessing the main memory from the operation of the access unit during normal microprogram execution, and switches the selection unit to the diagnostic microprogram only during the interlock. , a work register holding unit that holds the contents of the work register of the computer at the time of starting diagnosis execution, and a calculation result storage unit that stores the calculation results of the computer at the time of diagnosis execution.

[Industrial application field]

The present invention relates to a diagnostic device for a computer, and particularly to a diagnostic device for diagnosing the functions of a computer that has an arithmetic unit, a working register, a main memory, and an access unit that accesses the main memory. , a microprogram storage section that stores a diagnostic microprogram and a normal microprogram, and a diagnostic data storage section that stores diagnostic data necessary for diagnosis; The present invention relates to a diagnostic device for a computer including a control unit that executes calculations based on the following.

(Prior art) Conventionally, as a diagnostic device for the above-mentioned computer, the fourth
There is one shown in the figure. In the figure, 31 is an external storage device that stores a diagnostic program. In addition, 32 is a service processor that reads a diagnostic program stored in this external storage device, causes Calculation R33 to execute it, and determines whether the computer is operating normally by checking whether the calculation result of the computer is the same or different from the expected value. Diagnose whether or not. calculator 33
is composed of a storage device 34, a control section 35, and an arithmetic processing section 36.

In such a diagnostic device, the diagnostic program is generally executed first when the system of calculation ta33 is started, prior to executing other user programs.

For computers that operate 24 hours a day as other diagnostic equipment for computers, the control program (
A diagnostic program is included after a plurality of user programs (user programs A to C in the example shown in FIG. 5) in the operating system (OS), and a certain user program, for example, user program A, is included as shown in FIG. After executing user program C, a diagnostic program is executed to diagnose the computer, and if the computer is found to be normal, user program A is executed again.

[Problem to be solved by the invention]

By the way, the diagnostic device for the first computer mentioned above cannot be applied to a computer that operates 24 hours a day.
In addition, the diagnostic device in the second computer runs a diagnostic program at regular intervals, and the user program is not executed while this diagnostic program is running, which reduces the processing capacity of the computer. There's a problem.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a diagnostic device for a computer that can be used for a computer that operates 24 hours a day and does not reduce the execution efficiency of the user program of the computer.

[Means to solve the problem]

In the present invention, means for solving the above problems are as follows:
As shown in FIG. 1, a calculation unit 1, a work register 2,
This is a diagnostic device for diagnosing the functions of a computer 5 having a main storage device 3 and an access unit 4 that accesses the main storage device 3, and stores a diagnostic microprogram 6 and a normal microprogram 7. A microprogram storage section 8, a diagnostic data storage section 9 that stores diagnostic data necessary for diagnosis, and a control section 10 that causes the computer 5 to execute calculations based on the diagnostic data according to the diagnostic microprogram 6 from this storage means. a selection unit 11 that selects between the diagnostic microprogram 6 and the normal microprogram 7; and a calculation unit 1 of the computer 5 that occurs when accessing the main storage device 3 when the normal microprogram 7 is executed. a diagnostic control unit 12 that detects the interlock from the operation of the access unit 4 and switches the selection unit 11 to the diagnostic microprogram only during the interlock; This includes a work register holding section 13 for holding, and a calculation result storage section 14 for storing calculation results of the computer at the time of execution of the above-mentioned diagnosis.

[Effect]

According to the present invention, the diagnostic control unit detects an interlock of the arithmetic unit 1 of the computer 5 that occurs when accessing the main storage device 3 from the operation of the access unit 4 during the execution of the normal microprogram 7, and The selection section 11 is switched to the diagnostic microprogram side. At this time, the contents of the work register 2 of the computer are held in the work register holding unit 13, and the diagnostic microprogram performs calculations using the data in the diagnostic data storage unit, and the results are stored in the calculation result storage unit 13.
Store in 4. This operation is performed sequentially only while the arithmetic unit is interlocked, and when the arithmetic unit interlock ends, the data held in the work register is returned to the work register and the normal program can be restarted again.
Since this procedure is repeated in sequence, the computer can be diagnosed at any time without any deterioration in the performance of normal program execution.

(Example) Hereinafter, an example of a diagnostic device for a computer according to the present invention will be described based on the drawings.

2 to 4 show a first embodiment of a diagnostic device for a computer according to the present invention. In this embodiment, the diagnostic device for a computer is a computer having an arithmetic unit 1, a working register 2, a main memory 3, and an access unit 4 that accesses the main memory 3, as shown in FIG. This is a diagnostic device that diagnoses the functions of 5. In this embodiment, the diagnostic microprogram 6 and the normal microprogram 7 are stored in respective storage means, and there is a selection section that selects and outputs either of the microprograms, and a selection section that selects and outputs either of the microprograms. What is the control unit that controls each part?i
provided in the unit.

The diagnostic data storage unit 9 that stores the diagnostic data necessary for diagnosis and the calculation result storage unit 14 that stores the calculation results of the computer during diagnosis execution are integrated into one local storage (
LS) 15, and a work register holding unit 13 that stores the contents of the work register 2 according to instructions from the arithmetic unit work register 2 and a diagnostic control unit to be described later, and an access unit that accesses the main storage device via the S unit. 4, during the execution of the normal microprogram 7, the interlock of the arithmetic unit 1 of the computer 5 that occurs when accessing the main storage device 3 is detected from the operation of the access unit 4, and the selection unit 11 is activated during the interlock. A diagnostic control section 12 is provided which switches only the inside to the diagnostic microprogram side and stores the contents of the working register 2 in the working register holding section 13.
It is called E unit.

In this embodiment, the control unit 10 is provided with a service processor (SVP) 16 used for computer maintenance and the like. This service processor 16 collects and analyzes diagnostic information from the above-mentioned diagnostic device.

The operation of the diagnostic device in the computer according to the present invention will be explained below. FIG. 3 is a timing chart showing the operation of the diagnostic device in the computer according to this embodiment. In this embodiment, first, the i cycle.

A normal microprogram is read in the i unit in E cycle 1. During normal microprogram processing in the E unit, when a data read request to the main memory is issued (11), the arithmetic unit does not operate and enters an interlock state. At this time, a data read request is generated from the access unit to the main memory,
In response to this request, the diagnosis control unit instructs to start diagnosis (t2
).

The diagnostic control section saves the contents of the working registers that have been used so far into the working register holding section, switches the selection section to the diagnostic microprogram side, and issues an instruction to start the diagnostic microprogram (t3).

Then, the diagnostic microprogram executes diagnosis by issuing the following instructions to the control unit.

(2) Take out the diagnostic data from the LS and store it in the work register.

■Give the contents of the work register to the calculation section and execute the calculation,
The calculation result is stored in the calculation result area of LS via the work register.

(2) Take the expected value and result value of the operation from the LS into the working register and perform a comparison operation, and if they match, perform the next stage diagnosis according to the above-mentioned procedure.

(2) If the above comparison does not match, the control unit issues an operation error signal to the service processor, and the service processor collects diagnostic abnormality information and analyzes it later.

When access to the main storage device is completed (14), the access unit outputs an instruction to stop diagnosis to the diagnostic control unit (t5).

The diagnostic control section restores the data in the working register holding section to the working register, switches the selection section to the normal microprogram side, and the series of processing ends (t6).

Such processing is repeated every time the main storage device is accessed to perform the overall diagnosis.

Therefore, according to this embodiment, since the computer is diagnosed only during the interlock when accessing the main memory during normal program operation, the processing efficiency of the normal program is not reduced at all. ,
Since the computer can be tested at any time, the validity of the calculation unit can be guaranteed without reducing the computer's processing capacity, and the reliability of the computer can be improved, no matter how the computer is operated. can.

Furthermore, according to this embodiment, since the diagnostic abnormality information is collected in the service processor, the maintenance person can quickly identify the location of the abnormality and investigate the cause using the service processor.

(Effects of the Invention) As explained above, according to the present invention, the diagnostic control unit of the computer prevents the interlock of the arithmetic unit of the computer that occurs when accessing the main storage device during normal microprogram execution. Detected from the operation of the access section,
Switch the selection section to the diagnostic microprogram side, hold the contents of the computer's work register in the work register holding section, perform an operation using the data in the diagnostic data holding section by the diagnostic microprogram, and store the result in the operation result storage section. This operation shall be performed sequentially only while the arithmetic unit is interlocked, and when the arithmetic unit interlock ends, the data held in the work register holding unit shall be returned to the work register and the normal program shall be restarted again. Since this procedure is repeated in sequence, it is possible to diagnose the computer at any time without any deterioration in the performance of normal program execution. The correctness of the arithmetic unit can be guaranteed without degrading the
This has the effect of improving reliability.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a block diagram showing a first embodiment of the diagnostic device for a computer according to the present invention, and FIG. 3 is a diagram showing the operation of the diagnostic device for the computer shown in FIG. 4 is a diagram showing an example of a diagnostic device in a conventional computer, FIG. 5 is a diagram showing another example of a diagnostic device in a conventional computer, and FIG. 6 is a diagram showing an example of a diagnostic device in a conventional computer. It is a timing chart showing the operation. 1...Arithmetic unit 2...Work register 3...Main storage device 4...Access unit 5...Calculator 6...Diagnostic microprogram 7...Normal microprogram 8...Micro Program storage section 9...Diagnostic data storage section 10...Control section 11...Selection section 12...Diagnosis control section 13...Work register holding section 14...Calculation result storage section 58/01/1st month Idari 2nd figure ＼ 3 in 5 colors Medal 1st meeting 3rd figure

Claims (1)

[Claims] An arithmetic unit (1), a working register (2), and a main storage device (
3) and an access unit (4) that accesses the main storage device (3). A microprogram storage section (8) that stores the program (7), and a diagnostic data storage section (8) that stores the diagnostic data necessary for diagnosis.
9); and a control unit (10) that causes the computer (5) to execute calculations based on the diagnostic data according to the diagnostic microprogram (6) from the storage means, the diagnostic microprogram (6) and a selection section (11) for selecting the normal microprogram (7), and an arithmetic section (11) of the computer (5) that occurs when accessing the main storage device (3) during the execution of the normal microprogram (7). ) detects the interlock from the operation of the access section (4) and switches the selection section (11) to the diagnostic microprogram only during the interlock, and A work register holding unit (1) that holds the contents of the work register (2) of
3); and a calculation result storage unit (14) for storing the calculation results of the computer during execution of the diagnosis.