JPS608954A - Hang-up detecting method of computer program - Google Patents

Abstract

PURPOSE:To make an exclusive circuit and a program unnecessary, and to execute easily a hang-up detection by providing the first and the second flags, checking one flag when the prescribed time has elapsed, and detecting a hang-up by its result. CONSTITUTION:The first flags 0A, 1A which are reset by the end of a data processing operation by a program control, and the second flags 0B, 1B which are reset together with the first flags 0A, 1A when the value set to the first flag is shifted, and on the other hand, the data processing operation is ended are provided. In this state, the data processing operation is started, and thereafter, when the prescribed time has elapsed, the second flags 0B, 1B are checked by the interrupting operation, and in case these second flags 0B, 1B are turned on, a hang-up display is executed. Also, in case the flags 0B, 1B are turned off, an operation failure in a data processing device is detected by shifting the value set to the first flags 0A, 1A to the second flags 0B, 1B, and setting it.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a hang-up detection method for a computer program, and particularly to a hang-up detection method for a computer program in which hang-up detection is performed using a simple microprogram and a timer interrupt function. It is about the method.

(2) Background of the technology When data processing operations are performed by a data processing device such as a computer, if there is a fixed failure or programming error in the microprogram, the data processing device cannot perform its original processing operations, and the resulting processing operations A hang-up often occurs, such as when a part of the operation is repeatedly performed or when the operation stops progressing in the middle of the processing operation. In order to improve the operating efficiency of a computer, it is important to detect such hang-ups as soon as possible and take appropriate measures. On the other hand, the detection of hang amplifiers as described above is carried out in order to more smoothly perform the data processing operation that is the original work of the computer, or the arithmetic processing performed under the control of the O8 (operating system). However, since it has an auxiliary role for the various processing operations mentioned above, various improvements and innovations have been made to effectively utilize the capacity of the computer and to extend the actual working time.

(3) Prior Art and Problems FIG. 1 is a diagram showing an example of a hang-up detection circuit and monitoring software used in a conventional program-hang amplifier detection method. In this figure, reference numeral 1 denotes a hang-up detection circuit equipped with a counter 2 having a timer function and an all-zero detector 3 that detects the all-zero state of this counter 2, and 4 denotes a hang-up detection circuit of the data processing device. A data processing section, reference numeral 5, is a software monitor section that receives a command from the hang-up detection circuit 1 and interrupts program operation in the data processing section 4. In the data processing unit 4, a timer set operation 4a for setting the initial value of the counter 1 is performed.
, processing 4b to be performed by the data processing unit 4, and processing 4
At the end of step b, a timer reset operation 4c for resetting the counter 1'ft is sequentially performed in the program. In the hang-up detection circuit 1, the initial value of a counter 2 is set by a command from the data processing section 4, and this counter 2 is set in the hang-up detection circuit 1.
The 11 operation is performed in synchronization with the clock operation of the data processing section 4, and it is monitored whether or not no-up occurs in the data processing section 4 by measuring this time. While the data processing section 4 is operating normally, the counter 2 is reset to all 1s, for example, by receiving a timer reset operation every time the processing 4b is completed. Therefore, the all-zero detector 3 does not operate and no hang-up detection is performed. On the other hand, the data processing section 4
If a hang-up occurs for some reason, the counter 2 performs count amplification before the process 4b by the processing unit 4 is completed, and the all-zero detector 3 is activated to detect a hang-up. Based on this hang amplifier detection, a timer interrupt command is issued from the hang-up detection circuit 1 to the software monitor section 5.
interrupts the software program of the data processing section 4 and performs processing corresponding to the hang-up.

However, in such a conventional program hang-up detection method, a dedicated circuit must be provided to detect a hang-up in the data processing section 4, and a so-called monitor means must also be provided on the software. Therefore, even if the capacity of the computer is limited,
There is also the problem that it is disadvantageous in terms of increasing the efficiency of actual working hours.

(4) Purpose of the Invention The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to easily detect hang-up of a microprogram without providing a special circuit or program. The object of the present invention is to provide a hang-up detection method that can be used to detect hang-ups.

(5) Structure of the Invention In order to achieve the above object, the present invention includes a first flag that is reset at the end of a data processing operation under the control of the program, and a first flag that is reset in a data processing device controlled by a program. a second flag that is reset together with the first flag at the end of the data processing operation, and when a predetermined period of time has elapsed after the start of the data processing operation, the second flag is reset by an interrupt activation. The second 7-lag is checked, and if the flag of the relevant building 2 is on, a hang-up display is performed, while if it is off, the value set in the first flag is transferred to the second 7-lag and set. The gist of this invention is to detect malfunctions within the data processing device.

(6) Embodiments of the Invention Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 2 to 4 show the configuration of a data processing device for carrying out the hang amplifier detection method according to the present invention, and the operating state at each level of normal or interrupt (different from the timer interrupt described above). It is a diagram. This data processing device includes a control memory 11 (indicated by C8 in the figure) into which data necessary for various data processing operations are written, and a read register for reading out the data written in the control memory C8. 12 (indicated by C3DR in the figure), a hardware control unit 13 that manages various device components including the control memory 11 and the read register 12,
It has an address control unit 15 that calls an address to the control memory 11, and a timer 14 that measures elapsed time. A set of flags 16 or 17 used for detecting a hang amplifier in the processing device, and a hang-up display unit 18 that operates to display based on a hang-up detection operation.
It consists of:

The flags used are a flag 16 used in program operations at the interrupt program level (hereinafter referred to as program level 0) and a flag 17 used in program operations at the normal program level (hereinafter referred to as program level ↓). , the first flags OA, IA and the second flags OB, IB, !, corresponding to the respective program levels. xi. Force l flag O
A or IA is sent at the beginning of a data processing operation by the respective program level and reset at the end of this data processing operation. 2nd flag OB
, IB are the corresponding first flags OA, LA, respectively.
The values set in are transferred, while being reset together with the corresponding first flags OA and IA at the end of data processing operations by the respective program level.

The transfer of the set value from the first flag OA to the second flag OB and the transfer of the set value from the first flag IA to the second flag IB are caused by hangs caused by timer interrupts during data processing operations by each program. The up detection operation is performed when the set value of the second flag OB or IB is 0 (that is, off);
When the set value of B is 1 (ie, on), a hang-up display is performed.

A procedure for data processing and hang-up detection operations in a data processing apparatus having such a configuration will be described. FIG. 3 shows the operating procedure for idle loose at program level E. This operation starts from idle 21, and then REQ 1, REQ 2...
A search is made to see if there are various processing requests 22 represented by EQ n . This search operation is a processing request REQ 1
, REQ 2... Various processes executed by REQn PI, P2...Pn 24 are performed in descending order of processing priority, and if there is a processing request 22, the data processing operation is performed there. . For example, processing request REQ
If I is 1, the first flag IA is set to 1 and processing P1 is executed. When the process P1 is completed, the first flag IA and the second 7-lag IB are reset 20, and the process returns to the idle state 21. Even during this processing operation, the timer 14
When the timer 14 detects carrier rattle, a timer interrupt is generated, the processing of program level I is interrupted, and control is transferred to program level O.

FIG. 4 shows the operating procedure in the interrupt processing of program 0. In this operation, the TR30 signal is used to search which of the various interrupt requests 31 represented by TR-A, TR-B, - TR-N is making an interrupt request, and if the interrupt request 31 is If so, processing PA, PB, . . . , PN 33 corresponding to each interrupt request 31 is performed. For example, if the interrupt request TR-A is 1, the first 7
Set lag OA to 1 and execute processing PA. When the processing PA is completed, the first flag OA and the second flag OB are reset 34, and then the program returns to the program level 135.If the timer 14 detects a carrier load after the start of this processing PA but before the end. , a timer interrupt request 36 is received and a second flag OB is checked 37. If the set value of this second flag OR is 1, a hang-up display operation 38 is performed in the hang-up display section 18. On the other hand,
If the set value of the second flag OB is 0, the first flag O
Transfer the set value of A to the second flag OB and set it 3
9, then the first flag OA is checked 40. Then, if the set value of this first flag OA is 1, processing P
It is recognized that A is interrupted and a branch 41 is made to the interruption point.

If the set value of the first flag OA is O, the second flag I
Check 42 of B is performed. If the set value of this second flag IB is 0, the set value of the first flag IA is transferred to the second flag IB, set 44, and then the program returns to level 1.

If the transfer of the set value from the first 7 lags A to the second flag IB is performed during the line of process Pl of program level 1, the set value of the second flag IB is 1.
becomes. If execution of this process P1 is prevented due to a fixed problem in the program, it is detected at this point that the set value of the second 7-lag IB is 1.

Based on this, a hang-up display operation 43 is performed in the hang-up display section 18.

Therefore, if there is a fixed failure in at least one of the programs for program level 0 and the program for hub program level 1, and execution of data processing at that program level is prevented, In the evening, a timer interrupt request 36 was received on the carrier board at 14.
By checking 37.42 of the second flag OB or IB, a set value 1 which has not yet been reset is detected, and hang-up detection is performed.

Incidentally, the time interval of the timer interrupt due to the carrier signal of the timer 14 is set to a value sufficiently larger than the execution time of each process 24.33 at program level O or program level I. Or set the time interval of the timer interrupt to each process 24.
, 33, and the flag check (checking the second 7-lag OB or IB) may be performed only once every several timer interrupts.

(7) As described in detail, according to the present invention, first and second flags are provided in the data processing device, and one flag is checked by the operation of a timer that monitors the data processing time. However, since a hang-up is detected based on the result of this check, there is no need for a dedicated circuit for detecting a hang-up as in the prior art, and the configuration of the data processing device can be simplified. In addition, since there is no need to install a monitor on software and call up a monitor program using a timer to search for hang-ups, various effects can be achieved, such as reducing the execution time required to detect hang-ups. can get.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a hang amplifier detection circuit used in a conventional program hang-up detection method, and FIG. 2 is an explanatory diagram showing a configuration example of a data processing device for executing the hang amplifier detection method according to the present invention. 3 is a flow chart showing the operating state at the normal program level in the data processing device shown in FIG. 2, and FIG. 4 is a flow chart showing the operating state at the interrupt program level in the data processing device shown in FIG. It is a flowchart figure which shows an operating state. 1... Hang-up detection circuit 2... Counter (timer) 3... All zero detector 4... Data processing section 11... Control memory (CS)
12...Read register (C8DR) 13...Hardware control 14...Timer 15...Address control 16...Flag (for interrupt program level o) 17
...Flag (for normal program level 1) 18...
・Hang-up display section OA, IA...First flag OB, IB...Second flag Patent applicant Fujitsu Limited

Claims (1)

[Scope of Claims] l) A first flag in a data processing device controlled by a program that is set at the start of a data processing operation under the control of the program and reset at the end of the data processing operation; The value set in the first flag is transported while the value set in the first flag is
a second flag that is reset together with the flag;
When a predetermined period of time has elapsed after the start of the data processing operation, the second 7 lag is checked by interrupt activation, and if the flag of the cylinder 2 concerned is on, a hang amplifier display is performed, while if it is off, the first flag is 1. A hang-up detection method for a computer program, characterized in that a malfunction in a data processing device is detected by transferring and setting a value set in a second flag. 2) The first and second flags are provided as a set for each different program level, and are set and reset each time an operation is performed at each program level. A hang amplifier detection method using a computer program according to scope 1.