JPS61285552A - History information memory device - Google Patents

Abstract

PURPOSE:To obtain the satisfactory history information even with the small capacity of a memory device by designating an area where the history information on a processing action is stored within a program. CONSTITUTION:A flip-flop 10 has a function to indicate the writing of the history writing data 51 to a storage part 4 in a state '1' and is set at '1' of the initial state by a storage start signal 111 sent from a diagnosis control part 3. An address counter 6 supplies address data 53 and transmits the count data 54 in response to the counter switch signal 115. This signal 115 has a function to select a case where the data 54 obtained by adding 1 to the data 53 is transmitted or a case where the data 53 is neglected and the data 54 of all '0' is transmitted. The part 4 writes the data 51 given from an instruction control part 2 to the address indicated by the data 53 according to the writing signal 112.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a history information storage device, and particularly to a history information storage device that has an improved method for storing history information of processing operations of an information processing system.

[Conventional technology]

Information processing systems including combinators are commonly used in fields such as data processing and data communications. In recent years, such information processing systems have become increasingly complex and include increasingly sophisticated functions. Therefore, it is often extremely difficult to investigate and analyze all failures that occur during system operation and to determine their causes.

A history information storage device that sequentially stores the processing operations of the information processing system described above is used as a method for understanding the specific occurrence of such failures. Since this history information storage device m can capture specific data of the above-mentioned processing operations, it is extremely useful in investigating the cause of the above-mentioned failures.

However, the storage capacity of the history information storage device is limited, and it is actually impossible to have enough storage capacity to store all processing operations in various cases. Therefore, there is a drawback that data necessary to clarify the cause of a failure is frequently not stored.

Furthermore, the functional configurations of recent information processing systems have become increasingly complex, and their failures are wide-ranging. In other words, since hardware (HW), firmware (FW), and software (SW) perform system functions in conjunction with each other, it becomes even more difficult to capture the necessary and sufficient data once a failure occurs. There is also a drawback.

[Problem that the invention seeks to solve]

The problem to be solved by the present invention, in other words, the purpose of the present invention is to store only the portion of history information of processing operations of an information processing system necessary for investigating a failure etc. in a storage unit with a limited capacity. The object of the present invention is to provide a history information storage device that improves the above-mentioned drawbacks.

[Means for solving problems]

A history information storage device of the present invention stores history information of processing operations of an information processing system.
stopping means for stopping the storage operation when the history information storage device is performing a storage operation of storing the history information simultaneously with the processing operation; and activation for starting the storage operation when the storage operation is stopped. and reading means for reading out the history information stored in the history information storage device when the storage operation is stopped, and the stopping means, the starting means, and the reading means are all turned on. 7 is configured to be executed as a software instruction.

〔Example〕

Hereinafter, a history information storage device according to the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, a history information storage device 1 constitutes a part of an information processing system together with an instruction control section 2 and a diagnostic control section 3 (the entire information processing system is not shown).

The history information storage device 1 includes a storage section 4 that stores history information, an address register 5 that specifies the address of the storage section 4, an address counter 6 that updates the contents of the address register 5,
7 lips 7□, 7-12, the same (AND gates 21-27, and the same (AND gates 21-27, It is composed of OR gates 31-34.

The AND gate 21 causes the 7-lip flop 7 to hold the stop condition data 101 (hereinafter "stop" refers to stopping the storage operation of history information) in accordance with the stop condition setting signal 104. The AND gate 24 then outputs a logical product of the held signal and the stop condition report signal 106 from the instruction control unit 2 to the t-on gate 31 .

Similarly, the flip-flop 8 and AND gates 22 and 25 output the stop condition data 102 and the stop condition report signal 10.
7 and sends a signal t-0 to the gate 31,
Furthermore, flip-flop 9 and AND gates 23 and 2
6 sends a signal composed of the stop condition data 103 and the stop condition report signal 108 to the OR gate 31.

Here, the stop condition data 101 to 103 and the stop condition setting signal 104 are sent out from the diagnostic control section 3, and the stop condition report signals 106 to 108 are sent out from the command control section 2. Note that the flip-flops 7 to 9 are cleared by the stop condition initialization signal 105 sent by the diagnostic control section 2.

The 0-gate gate 31 has the above stop condition data 101 to 103.
In addition to this, a stop signal 109 from the FW (firmware, hereinafter referred to as FW) included in the command control unit 2 is also input, and a stop signal 110 is sent out.

The flip-flop IO has a function of instructing the writing of the history write data 51 to the storage unit 4 in the state of @l#, and is set to the initial state l'' by the storage start signal 111 sent by the diagnostic control unit 3. It is reset to "O#" by the stop signal 110 mentioned above.

The flip-flop 11 has a function of inhibiting the above-mentioned writing to the storage section 4 in the state of 11'', and is activated by the above-mentioned storage start signal 111 or 8W (software, hereinafter referred to as SW) sent by the instruction control section 2. It is reset to the initial state @"0" by the signal 117 (these are logically summed by the OR gate 33), and 11" is reset by the stop signal 116 of 8W sent by the instruction control unit 2.
is set to

AND gate 27 sends write signal 112 when flip-flop 10 holds 11# and flip-flop 11 holds 10# (ie, indicates that a storage operation should be performed).

The OR gate 34 receives the read signal 1 sent by the diagnostic control unit 3.
13 and the above-mentioned write signal 112, and outputs the address register update signal 114. The address register 5 inputs the above-mentioned address register update signal 114IC and therefore the count data 54t-, and outputs the address data 53.

The address counter 6 inputs the above address data 53 and sends out count data 54t in accordance with the counter switching signal 115 sent out by the diagnostic control section 3. This counter switching signal 115 is either to send the address data 53 plus 1t to the count data 54f, or to ignore the address data 53t and to send all @"O" count data 5.
Select either one to send 4.

The storage unit 4 stores address data 5 in accordance with the write signal 112.
The history write data 51t sent by the command control unit 2 is written to the address indicated by 3. The content is read from the address indicated by the address data 53 and sent to the diagnostic control unit 3 as history read data 52.

Note that the flip-flop 12 outputs either the logout signal 118 sent by the instruction control unit 2 or the stop signal 110 described above (or fc is both) through the OR gate) 32t.
- Manually sends the logout instruction signal 119 to the diagnostic control unit 3.

Note that the flip-flop 12 is an ORI gate) 32t, and the instruction control unit 2 sends out the a signal 11B't through one of the above stop signals 110 (t or both).
is input, and a logout instruction signal 119 is sent to the diagnostic control unit 3.

FIG. 2(a) is a flowchart showing an example of software that is executed in the information processing system.

In the same figure, the loop consisting of processes 61, 62: TP and 64 indicates normal processing operation as an information processing system.
The normality of the processing results before j is checked. If an incorrect processing result due to a failure or the like is detected while executing IN8TB1 in process 62, the process immediately moves from that step to process 63. Process 634 is a program that performs post-processing of the above-mentioned illegal processing.

FIG. 2(b) shows that the device 1 is used for the history information record Ir1,
This is a flowchart of a program in which the 1a-gram in FIG. 2(a) above is modified in order to obtain detailed information on the illegal processing detected by the above-mentioned IN8TBj. In the same figure, process 7
A loop consisting of 1.73 and 77 indicates a normal processing operation as a normal processing system as an information processing system. Processes 72 and 74 provide a mechanism for storing necessary portions of the history information of such processing operations.

Process 72 starts execution by BRANCH of process 71, and TRACE 几5TOP, that is, history information storage device 1
The storage operation is stopped and the process returns to step 71 again. Similarly, process 74 starts execution by BRANCH of process 73, starts TRACER5TART, that is, the storage operation of history information storage device 1, and returns to process 73 again. By these mechanisms, the history information storage device [1 is I of process 71]
Stores history information of processing operations before NET 1.

Process 73 when the processing operation is continued as described above.
If all incorrect processing results due to a failure or the like are detected during execution of IN8TBj, the process immediately moves from that step to process 75. Processing 75 performs post-processing of the above illegal processing and BRANCH to processing 76, T) LACB
G (JUT, that is, reads the history information from the history information storage device 1, executes 'I'R, ACBR8TART, and then returns to process 75.

In this way, by specifying the part of the program of the information processing system in which the history information of the processing operation is to be stored, the history information storage device 1 stores the history information of the specified part, and also stores the history information of the specified part. can be read.

In the above embodiment, the stop condition data 101 to 1031
In the above, up to three pieces are illustrated and explained, but the number may be four or more or two or less. That is, the present invention is not limited by the number of stop condition data.

〔Effect of the invention〕

As explained in detail above, according to the history information storage device of the present invention, by instructing a part of the processing operation of an information processing system in its program, the point of occurrence and the point of detection of fraudulent processing can be temporally determined. Even if you are in a processing loop (which was far away), you can instruct the processing program to start and stop storing history information. Even if the storage unit for history information is at risk of running out of walking capacity, sufficient history information can be obtained, making it possible to easily and efficiently investigate problems.

In addition, since it is possible to record detailed history information as described above, it is possible to acquire the necessary data while narrowing down the target when investigating problems such as failures.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the history information storage device according to the present invention, and FIG. 2 (al and (b)) is a flow chart explaining the operation of the embodiment of FIG. 1. ...History information storage device, 4...Storage unit, 5...Address register, 6...
Address data, 7-12...Flip-flop, 21-27...AND gate, 31-3
4...Of(gate, 51...history write data, 52...history read data, 53
...Address data, 54...Kaku/
data, 101-103...Stop condition data, 104...Stop condition setting signal, 105...
...Stop condition initialization signal, 106-108...
・Stop condition report signal, 109... Stop signal by FW, 110... Stop signal, 111...
...Storage start signal, 112...Write signal, 1
13... Read signal, 114... Address register update signal, 115... Counter switching signal, 116... Stop signal by SW, 11
7...Start signal by SW, 118...
- Logout signal, 119...Logout instruction signal.

Claims (1)

[Scope of Claims] In a history information storage device that stores history information of processing operations of an information processing system, when the history information storage device is performing a storage operation of storing the history information simultaneously with the processing operation, the storage a stopping means for stopping the operation; a starting means for starting the storage operation when the storage operation is stopped; and a start means for starting the storage operation when the storage operation is stopped; 1. A history information storage device, comprising: reading means for reading data, wherein the stopping means, the starting means, and the reading means are all executed as software instructions.