JPH04352042A - Memory dump collecting system - Google Patents

Abstract

PURPOSE:To reduce the output quantity of a memory dump by selecting a process and an area in the process in the case of outputting a memory dump when system down is generated. CONSTITUTION:In the case of outputting a memory image to a secondary storage device 8 at the time of system down, a system down process identifier(ID) storing means 1 stores the process ID of a process generating the system down, a system down relating process ID selecting means 2 selects a process 5 relating to the process stored in the means 1 from plural processes stored in a main storage device 7, a dump output area selecting means 3 selects an area 6 indicated by a saving register for the process indicated by a system down relating process ID, and a memory dump output means 4 outputs the selected area 6 in the selected process stored in the device 7 to the device 8. Since the output quantity of the memory dump is reduced, a secondary storage device of large capacity is not required and a dump output time is shortened.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a method for outputting a memory dump when a system goes down in a computer with a large memory capacity, and in particular reduces the amount of memory dump output to save the capacity of the memory dump output file and at the same time. This invention relates to a memory dump output method that reduces the memory dump output time and shortens the time required to restart the system after a system failure occurs.

0002

2. Description of the Related Art Conventionally, when outputting a memory image to a secondary storage device, memory images of all processes existing in a system are output as a dump.

0003

SUMMARY OF THE INVENTION Therefore, computers with large-capacity memories require large-capacity secondary storage devices for outputting memory dumps. Furthermore, there is a problem in that the memory dump output time becomes enormous, and it takes a lot of time to start up the system again.

An object of the present invention is to provide a memory dump collection method that reduces the amount of memory dump output by selecting a process and an area within the process when outputting a memory dump when a system goes down.

[0005]

[Means for Solving the Problems] The memory dump collection method of the present invention includes a system down process identifier storage means for storing a process identifier of a process that caused a system down, and a system down process identifier stored in the system down process identifier storage means. system down related process identifier storage means for selecting and saving processes related to system down based on down process identifiers; dump output area selection means for selecting an area indicated by the save register; and outputting the selected area in the selected process on the main storage device to a secondary storage device in accordance with a request from the dump output area selection means. A memory dump output means.

[0006]

[Example] Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram illustrating an embodiment of the present invention. In the figure, 1 is a system down process identifier storage unit that stores the process identifier of the process that caused the system down, and 2 is a system down process identifier that stores information related to the system down based on the system down process identifier stored in the system down process identifier storage unit. System down-related process identifier storage means for selecting and saving a process; 3 a dump output area for selecting an area indicated by the save register of the process indicated by the system down-related process identifier stored in the system down-related process identifier storage means; A selection means (4) is a memory dump output means (5) for outputting a selected area in the selected process on the main storage device to a secondary storage device in accordance with a request from the system down-related process identifier storage device.
is the selected process, 6 is the selected area within the selected process, 7 is the main storage where the selected process exists, and 8 is the secondary storage for memory dump output. represent.

When outputting a memory image to a secondary storage device at the time of a system down, the system down process identifier storage means 1 stores the process identifier of the process that caused the system down, and the system down related process identifier storage means 2 stores the process identifier of the process that caused the system down. The process that caused the system down indicated by the process identifier stored by the system down process identifier storage means 1 and the process related to the process that caused this system down are selected from among the processes on the main storage device 5, and the dump output is performed. The area selection means 3 selects the area indicated by the save register of the process indicated by the process identifier of the process related to the system down stored in the system down related process identifier storage means, and uses the memory dump output means 4 to save the area to the main storage 7. The selected area 6 in the above selected process 5 is output to the secondary storage device 8.

[0009] In addition to the process selected by the system down related process identifier storage means 2, if there is a process necessary for failure analysis, it is selected by another means, and the memory dump output means 4 also stores the memory image of the process. It may also be output.

[0010] As a result, the area for outputting the memory dump is limited to the area stored in the dump output area selection means 3, so the amount of dump output is reduced, and a large-capacity secondary storage device is required for outputting the memory dump. Also, without the need for
The time it takes to restart the system is reduced.

[0011]

[Effect of the invention] When outputting a memory dump, the amount of memory dump output is reduced by selecting and outputting only the memory image of the process necessary for failure analysis. Since a secondary storage device is not required and the dump output time is shortened, the time required to restart the system can be shortened.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram illustrating an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... System down process identifier storage means, 2... System down related process identifier storage means, 3... Dump output area selection means, 4... Memory dump output means, 5...
process, 6... selected area within the process, 7... main storage, 8... secondary storage.

Claims (1)

[Claims] 1. In collecting a memory dump at the time of a system down, system down process identifier storage means for storing a process identifier of a process that caused a system down, and a system down process identifier stored in the system down process identifier storage means are provided. A system down-related process identifier storage means for originally selecting and saving a process related to a system down, and a save register for the process indicated by the system down-related process identifier stored in the system down-related process identifier storage means. Dump output area selection means for selecting an area; and memory dump output means for outputting the selected area in the selected process on the main storage device to a secondary storage device in accordance with a request from the dump output area selection means. A memory dump collection method comprising: