JPH03156547A - Memory dump gathering device - Google Patents

Abstract

PURPOSE:To reduce the overall transfer data volume by compressing data of the same contents to transfer it to a host computer at the time when data of the same contents continuously exists in a memory image. CONSTITUTION:When the memory image of a communication control program 5 operated on a prepositive communication processing device 10 is stored in an external file 8 of a host computer 9 by a memory dump gathering program 6 operated on the computer 9 and a memory image transfer program 7 operated on the device 10, the program 6 operated on the computer 9 requests the program 7 in the device 10 to start the transfer of memory image of the program 5. Thereafter, transferred memory image data 11 is received and is written in the file 8, and the program 7 operated on the device 10 starts gathering of the memory image when being requested to transfer the memory image of the program 5; and when all memory image data is transferred to the program 7, the memory image is checked to compress data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention provides a memory dump collection program running on a host computer and a front-end communication processing device that stores a memory image of a communication control program running on a front-end communication processing device. The present invention relates to a memory dump collection means of a front-end communication processing device in an online system in which a memory image transfer program that operates on the memory image transfer program is stored in an external R file on a host computer.

〔overview〕

The present invention is a memory dump collection means for a front-end communication processing device, in which the time required for dumping can be shortened by incorporating means for compressing data to be dumped into the front-end communication processing device. It is.

[Conventional technology]

Conventionally, a memory image of a communication control program running on a front-end communication processing unit is transferred to an external file on the host computer by a memory dump collection program running on the host computer and a memory image transfer program running on the front-end communication processing unit. In the memory dump collection means stored in the memory dump, the memory image transfer program running on the front-end communication processing unit performs data processing on the entire memory image in the range from the lowest address to the highest address where the communication control program is stored. The data was transferred directly to the memory dump collection program running on the host computer without performing any process.

[Problem to be solved by the invention]

The memory image of the communication control program running on such a conventional front-end communication processing device is transferred to the host computer by a memory dump collection program running on the host computer and a memory image transfer program running on the front-end communication processing device. With the memory dump collection means stored in an external file, if the image of the communication control program developed on the memory of the front-end communication processing unit has the same content repeatedly, for example, 100 consecutive data "0" etc.), the memory image data is transferred as is without any processing, resulting in an increase in the amount of data transferred, resulting in an increase in memory dump collection time, and an increase in the file size for storing memory images. However, since the communication control program is restarted after the collection of memory dumps is completed, recovery of the online system is delayed.Furthermore, since the memory dump collection time is long, priority is given to restarting online memory dumps. Collection is discontinued, and information for investigating the cause of the failure is likely to be insufficient, resulting in the recurrence of failures due to the same cause.

In this way, with conventional memory dump collection means, when a failure occurs in the front-end communication processing unit, recovery of the online system is delayed due to the collection of failure information, the file capacity for storing memory images increases, and It is difficult to prevent the same failure from occurring again, and has a fatal operational drawback.

SUMMARY OF THE INVENTION The present invention aims to eliminate such drawbacks and to provide a memory dump collection device for a front-end communication processing device that can quickly collect memory dumps.

[Means to solve the problem]

The present invention is coupled to a system including a front end communication processing device having a communication control program and a host computer connected to an external file, and the front end communication processing device has a memory image of the communication control program. A memory image transfer program having a memory image transfer means for transferring related data is included, and the host computer includes a memory dump collection program for collecting data transferred from the memory image transfer means and writing it to the external file. In addition, the memory image transfer program includes a new memory image generated by compressing repeated portions of the same content existing in the memory image of the communication control program. The present invention is characterized in that it includes a memory image compression means for applying to the transfer means.

[Effect]

The memory image of the communication control program running on the front-end communication processing unit is stored in an external file on the host computer by the memory dump collection program running on the host computer and the memory image transfer program running on the front-end communication processing unit. When doing so, the memory dump collection program running on the host computer requests the memory image transfer program in the front-end communication processing unit to start transferring the memory image of the communication control program,
The memory image data transferred thereafter is received, the received memory image data is written to an external file, and the memory image transfer program running on the front-end communication processing unit requests the transfer of the memory image of the communication control program. The memory image is checked and data compression is performed when all memory image data is transferred to the memory dump collection program.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing the configuration of this embodiment, FIG. 2 is a flow chart explaining the operation of the memory dump collection means 1 shown in FIG. 1, and FIG. 3 is the operation of the memory dump writing means 2 shown in FIG. 1. FIG. 4 is a flowchart explaining the operation of the memory image transfer means 3 shown in FIG. 1, FIG. 5 is a flowchart explaining the operation of the memory image compression means 4 shown in FIG. 1, and FIG. 7 is a diagram showing the format of the memory image data 11 and the transfer end instruction data 12, and FIG. 8 is a diagram showing the format of the external file 8 that stores the memory dump image.

As shown in FIG. 1, this embodiment includes a memory dump collection program 6 running on a host computer 9, a memory image transfer program 7 and a communication control program 5 running on a front-end communication processing device 10, and a communication control program The memory dump collection program 6 includes an external file 8 that stores the memory image of 5.
The memory image data 11 passed from the memory dump collection means 1 and the memory dump collection means 1, which start transferring the memory image and receiving the transfer data, is transferred to the external file 8.
It is composed of a memory dump writing means 2 for writing to
The memory image transfer program 7 also receives a memory dump collection request from the memory dump collection program 6 and is a communication control program in response to a request from the memory image transfer means 3 and the memory image transfer means 3 for transferring the memory image data 11. The memory image compression means 4 comprises a memory image compression means 4 which assembles the memory images of 5 into data blocks of a specified length while compressing them.

That is, this embodiment is coupled to a system including a front-end communication processing device 1O having a communication control program 5 and a host computer 9 connected to an external file 8. A memory image transfer program 7 having a memory image transfer means 3 for transferring data related to the memory image of the program 5 is included, and a host computer 9 collects the data transferred from the memory image transfer means 3 to an external file 8. Furthermore, as a feature of the present invention, the memory image transfer program 7 further includes a memory dump collection program 6 that compresses and processes repetitive parts of the same content existing in the memory image of the communication control program 5. A memory image compression means 4 is included for supplying a new memory image generated by the process to the memory image transfer means 3.

Next, the operation of this embodiment will be explained with reference to FIGS. 1 to 8.

Referring to steps S21 to S25 in FIG. 2, the memory dump collection means 1 requests the memory image transfer program 7 running on the front-end communication processing device 10 to start transferring the memory image (step 521), and instructs the file open. Then, it calls the memory dump writing means 2 (step 522), and then determines whether the transfer data transferred from the memory image transfer program 7 is the memory image data 11 or the transfer end instruction data 12 based on the identifier A of the transfer data ( Step 523). As a result of the determination, if the transfer data is the memory image data 11, the memory dump writing means 2 is called with an instruction to write that data (step 524). If the transfer data is the transfer end instruction data 12, it instructs to close the file and calls the memory dump writing means 2 (step 525).

Referring to steps S31 to S336 in FIG. 3, the memory dump writing means 2 determines which of the following instructions the instruction information is: (i) a file open instruction, (i) a data write instruction, (ii) a file close instruction (step 531). As a result of the determination, if the instruction information is a file open instruction, control information such as the current block write address on the file is initialized (step 532), and the file status a on the external file 8 is set to open status (step 532). 533). If the instruction information is ■Data write instruction, the actual data image C is set to the number of characters indicated by the memory image data manager B in the memory image data 11 at the position indicated by the current block write address b, and the number of characters stored in the block is set to the data in the block. (step 534). Thereafter, the number of stored blocks C is increased by "1" and the current block write address b is updated (step 535). If the instruction information is ■File close instruction, file status a on the file is changed to closed status (step 536
).

Referring to steps 541 to 547 in FIG. 4, when the memory image transfer means 3 accepts the start of memory image transfer from the communication control program 5 (step 541)
, initialize the memory image transfer position with the value of the lowest address where the communication control program 5 is stored (step 5).
42). After that, the memory image compression means 4 is called by specifying the memory image transfer position and the transfer data length (step 543), and the transfer data returned from the memory image compression means 4 is sent to the memory dump collection program 6 as the memory image data 11. Transfer (step 544).

Furthermore, the returned next memory image transfer location is updated (step 545). It is determined whether the memory image transfer position has reached the highest address of the memory where the communication control program 5 is stored (step 546), and if it has not reached the highest address, the process advances to step S43;
If the total memory image transfer has been completed, the transfer end instruction data 12 is transferred to the memory dump collection program 6 (step 547) and the process ends.

Referring to FIG. 5, the memory image compression means 4 assembles data while compressing the data from a given memory image transfer position (step 551). However, MR compression is used as the compression method.

Step 552) to check whether data has been assembled up to a given specified block length while being compressed.
If the specified length has not been reached, the process advances to step S51.

When the specified length is reached, the next position of the assembled data is brought back as the new memory image transfer position (step 553).
).

Referring to FIGS. 6 and 7, the memory image data 11 includes an identifier A1 for identifying whether the transfer data is the memory image data 11 or the transfer end instruction data 12, a memory image data length B, and an actual compressed memory image C. The transfer end instruction data 12 is made up of an identifier A (the contents of which indicate the transfer end instruction data).

Referring to FIG. 8, the external file 8 has a file status 81 indicating whether the file is open or closed; a current block indicating the location where the next memory image will be stored; a write address 51; a storage block indicating the number of blocks stored in the file; Number C1 One block is composed of the number of characters stored in the block d and a memory image e.

〔Effect of the invention〕

As explained above, when the same content exists continuously in a memory image, the present invention compresses the data of that part and transfers it to the host computer, so the total amount of data to be transferred is reduced. When online service is interrupted due to a failure in a communication processing device or a communication control program running thereon, the time required to collect memory images needed to investigate the status of the communication control program can be shortened. In addition, the time to start re-downloading the communication control program to the front-end communication processing unit after memory dump collection is completed can be accelerated, and data compression reduces the overall amount of memory images to be transferred. , the file size for storing it can be reduced, and as a result, it is possible to reduce the time it takes to resume normal operation in the event that the online service is interrupted due to a failure in the front-end communication processing unit or the communication control program running on it. Recovery time can be shortened, and failure information that was traditionally sacrificed to shorten failure recovery time can now be collected, preventing failures caused by the same cause. has the effect of reducing unnecessary file size.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the memory dump collection means 1. FIG. 3 is a flowchart showing the operation of the memory dump writing means 2. FIG. 4 is a flowchart showing the operation of the memory image transfer means 3. FIG. 5 is a flowchart showing the operation of the memory image compression means 4. FIG. 6 is a diagram showing the format of memory image data. FIG. 7 is a diagram showing the format of transfer end instruction data. FIG. 8 is a diagram showing the detailed format of an external file that stores a memory dump image. DESCRIPTION OF SYMBOLS 1... Memory dump collection means, 2... Memory dump writing means, 3... Memory image transfer means, 4.
. . . Memory image compression means, 5. Communication control program, 6. Memory dump collection program, 7.
Memory image transfer program, 8... External file, 9... Host computer, 10... Front end communication processing device, 11... Memory image data, 12...
Transfer end instruction data.

Claims (1)

[Scope of Claims] 1. The front-end communication processing device is connected to a system including a front-end communication processing device having a communication control program and a host computer connected to an external file, and the front-end communication processing device has a communication control program including the above-mentioned communication control program. The host computer includes a memory image transfer program having a memory image transfer means for transferring data related to the memory image, and the host computer includes:
In a memory dump collection device that includes a memory dump collection program that collects data transferred from the memory image transfer means and writes it to the external file, the memory image transfer program further includes a memory image of the communication control program. 1. A memory dump collection device comprising memory image compression means for supplying a new memory image generated by compressing repeated parts of the same content existing in the memory image transfer means to the memory image transfer means.