JPH03230231A - Stand-alone dump processing system - Google Patents

Abstract

PURPOSE:To eliminate the need for large memory capacity and to speed up dump processing by dumping only irreducible necessary data required for dump investigation. CONSTITUTION:A 1st specifying means 13 specifies paged-out data on an external storage device 2 in a space which operates in a system-down state and a 2nd specifying means 14 specifies the paged-out data on an external storage device 2 in a global service space. Then a dump processing means 15 dumps data which are developed on a real storage 10 at the system-down time to a dump file 3, and also reads out and dumps the data, specified by the 1st and 2nd specifying means 13 and 14, to the dump file 3. Consequently, the dumped data can be sampled speedily with the dump file having small memory capacity.

Description

[Detailed Description of the Invention] [Summary] Regarding a stand-alone dump processing method for collecting dump data when a system is down, the object is to enable collecting dump data at high speed and in a dump file with a small memory capacity. a first identification means for identifying paged-out data on an external storage device in a space that was operating at the time of system down; and a second identification means for identifying paged-out data on an external storage device in a global service space. and, when the system goes down, dump the data expanded on the real storage to a dump file, and read the data identified by the first and second identifying means from the external storage device and dump it to the dump file. and dump processing means.

[Industrial Application Field] The present invention relates to a stand-alone dump processing method for collecting dump data when a system is down, and in particular, to enable collecting dump data at high speed and in a dump file with a small memory capacity. This relates to a standalone dump processing method.

When the system goes down due to an abnormality in a processor module or the like, stand-alone dump processing is executed and dump data is stored in a dump file. It is necessary to take measures to enable this stand-alone dump processing to be executed faster and according to a dump file with a smaller capacity.

[Conventional technology]

In conventional standalone dump processing, data expanded on real storage is dumped to a dump file, or
Alternatively, if the data expanded on the real storage device alone is insufficient material, dump all of the data expanded on the external storage device in addition to the data expanded on the real storage device to a dump file. was being executed.

(Problem to be Solved by the Invention) However, if all the data expanded to an external storage device is dumped into a dump file, the amount of data to be dumped will be enormous, so it will require a large memory capacity. There is a problem in that it is necessary to prepare a dump file, and there is also a problem in that dump processing takes a long time.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a new standalone dump processing method that allows dump data to be collected at high speed and in a dump file with a small memory capacity. .

[Means to solve the problem]

FIG. 1 is a diagram showing the basic configuration of the present invention.

In the figure, l is a data processing device equipped with the present invention, 2 is an external storage device included in the data processing device 1, 3 is a dump file included in the data processing device 1, IO is a real storage, and 11 is a system down detection means. 2 is an area management means that includes a space control table 121, a queue ladder 122, a current space pointer 123, a segment table 124, a page table 125, etc. It is.

This space control table 121 manages the control information of the corresponding space, the queuing 122 points to the space control table 121 at the head position of the space control table 121 to be queued, and the current space pointer 123 controls the operation processing. The segment table 124 points to the page table 125, and the segment table 124 points to the page table 125.
manages the address information of pages paged in to the real memory 10, and also manages the address information of pages paged out to the external storage device 2.

Reference numeral 13 denotes a first identification means, which identifies the data that has been downloaded to the external storage device 2 in the space that was operating at the time of system downtime, and 14, a second identification means, which identifies the data that has been uploaded to the external storage device 2 in the space that was operating at the time of the system down. 15 is a dump processing means that specifies the data that has been paged out to the external storage device 2 of the space, and when the system goes down, it dumps the data developed in the real memory 10 to the dump file 3, and The data identified by the first and second identifying means 13 and 14 is read from the external storage device 2 and dumped into the dump file 3.

[Effect]

In the present invention, when the system down detection means 11 detects a system down, the first identifying means 13 first identifies the space control table 121 pointed to by the current space pointer 123, so that when the system goes down, Identify the space in which it was operating.

Next, the first specifying means 13 specifies the segment table 124 that the specified space control table 121 points to, and also specifies the segment table 124 that the specified space control table 121 points to.
4 specifies the page table 125 pointed to. Then, the first identifying means 13 identifies the data paged out to the external storage device 2 in the space that was operating at the time of the system down, according to the identified page table 125.

On the other hand, the second specifying means 14 first traces the space control table 121 from the ladder 122 to the queue as a starting point.
For example, a space control table 121 that manages a global service space that is configured by a part of O3 and provides general-purpose services is specified.

Next, the second specifying means 14 specifies the segment table 124 that the specified space control table 121 points to, and also specifies the segment table 124 that the specified space control table 121 points to.
4 specifies the page table 125 pointed to. Then, the second specifying means 14 specifies the data paged out to the external storage device 2 in the global service space according to the specified page table 125.

Then, when the system down detection means 11 detects a system down, the dump processing means 15 controls the real storage 1
In addition to the data expanded to 0, the data specified by the first and second specifying means 13 and 14 is read from the external storage device 2 and dumped into the dump file 3.

As described above, according to the present invention, the real memory 1
Instead of uniformly dumping the data expanded to 0 and the data stored in the external storage device 2 to the dump file 3, the data expanded to the real memory 10 and the data stored in the space that was operating at the time of system down are dumped to the dump file 3. Since it processes only the minimum data required for dump investigation, namely page-out data and page-out data of the global service space, it requires a larger memory capacity than necessary. This eliminates the need to prepare a dump file and also eliminates the long time required for dump processing.

〔Example] Hereinafter, the present invention will be explained in detail according to examples.

FIG. 2 shows the system configuration of the data processing apparatus 1 that executes stand-alone dump processing according to the present invention. In FIG. 2, as explained in FIG. 1, 2 is an external storage device, 3 is a dump file, 10 11 is a real memory, 11 is a system down detection means, and 12 is an area management means. Reference numeral 16 denotes a stand-alone dump processing means for executing stand-alone dump processing according to the present invention.

As shown in FIG. 3, the area management means 12 has a space control table 121 (hereinafter sometimes referred to as AsCT in the figure) that manages control information of spaces that are queued and correspond to each other, and A queue header 122 that points to the space control table 121 at the head position of the space control table 121 to be read, a current space pointer 123 that points to the space control table 121 that is undergoing operation processing, and a real memory 1 of the corresponding space.
A page table 125 (hereinafter sometimes referred to as POT) that manages address information of pages paged in to external storage device 2 and address information of pages paged out to external storage device 2; and a space control table. 121 to manage expanded addresses of the page table 125.

The message-based data processing device 1 has an application space and a global service space, which is configured by, for example, a part of O8 and provides general-purpose services such as file access processing. What is required to collect a standalone dump is the data information of the current space that was operating at the time of the system down and the data information of this global service space. Therefore, the space control table 121 according to the present invention is a space control table 121 created correspondingly.
is configured to manage a space display that indicates whether the space being managed is an application space or a global service space.

Next, the stand-alone dump processing according to the present invention will be described in detail according to the flowchart shown in FIG. 4, which is executed by the stand-alone dump processing means 16.

When the system down detection means 11 detects a system down, the standalone dump processing means 16 first transfers the data developed in the real memory O to the dump file 3, as shown in step 1 of the flowchart in FIG. Dump to. Data deployed in real storage is
This is because it is indispensable for investigating system failures. Next, in step 2, the current space pointer 12
3, the space control table 121 that manages the space that was operating at the time of system down is retrieved, and in the subsequent step 3, the corresponding page table is extracted from the segment table 124 pointed to by the retrieved space control table 121. Take out 125.

In this way, when the page table 125 of the space that was operating when the system went down is retrieved, in step 4,
Check whether the pages have been paged in to the real memory IO one by one. If they have not been paged in, that is, if they have been paged out to the external storage device 2, proceed to step 5 and transfer the pages to the external storage device 2. The data that has been paged out from 2 is read out and dumped to dump file 3, and in the following step 6, it is determined whether or not processing has been completed for all pages of the retrieved page table 125. If so, the process returns to step 4. On the other hand, when it is determined in step 4 that the page has been paged in, since the page has already been dumped according to the process in step 1, it is recommended to immediately proceed to the determination process in step 6 without executing the process in step 5. Process.

Based on the judgment in step 6, the retrieved page table 1
When it is determined that the processing has been completed for all pages of 25, the process proceeds to step 7, where the first space control table 121 is extracted according to the queue header 122, and in the subsequent step 8, the space display of this extracted space control table 121 is set to global. Determining whether the service space is being displayed, determining whether or not the retrieved space control table 121 is the space control table 121 that has already been retrieved according to the processing in step 2, and displaying the global service space; If it is determined that the data is not the space control table 121 retrieved in step 2, the data in this global service space is also essential for investigating a system failure and has not been dumped according to the process in step 5. Therefore, the process proceeds to step 9 to dump data related to this global service space.

That is, the space control table 121 extracted in step 9
The corresponding page table 125 is extracted from the segment table 124 pointed to by the following step 1.
0, the page 111 is checked to see if it has been paged in to the real memory 10, and if it has been paged out to the external storage device 2, the process proceeds to step 11 and the data that has been paged out is is read from the external storage device 2 and dumped to the dump file 3. In the following step 12, it is determined whether or not processing has been completed for all pages of the retrieved page table 125. If the processing has not been completed, Processing returns to step 10.

On the other hand, if the page has been paged in as determined in step 10, the page has already been dumped according to the process in step 1, so the process proceeds to step E2, without executing the process in step 11. .

Then, when determining that the processing has been completed for all pages of the space control table 121 retrieved in step 12, and even if the global service space is not displayed in step 8 or is already displayed, step 5 is already completed. When determining that the dump has finished, step 1
In step 3, it is determined whether or not all the space control tables 121 have been processed, and when it is determined that all the space control tables 121 have been processed, the processing is terminated. When making a judgment, the next space control jB table 121 queued in step 14 is retrieved and processing returns to step 8 in order to judge whether the next space control table 121 is related to the global service space. .

In this way, in the present invention, the minimum required for dump investigation is the data developed in the real memory 10, the page-out data of the space that was operating at the time of the system down, and the page-out data of the global service space. The process will be performed so that only the data of

〔Effect of the invention〕

As explained above, according to the present invention, processing is performed to dump only the minimum amount of data required for dump investigation. This eliminates the need to prepare files and also eliminates the long time required for dump processing.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle configuration of the present invention, FIG. 2 is a system configuration diagram of a data processing device equipped with the present invention, FIG. 3 is a detailed configuration diagram of the area management means, and FIG. 4 is a stand-alone system according to the present invention. 3 is a flowchart executed by dump processing means. In the figure, 1 is a data processing device, 2 is an external storage device, 3 is a dump file, 10 is a real storage, 11 is a system down detection means, 12 is an area management means, 13 is a first identification means,
14 is a second specifying means, 15 is a dump processing means, 16 is a standalone dump processing means, 121 is a space control table,
122 is a queue header, 123 is a current space pointer, 12
4 is a segment table, and 125 is a page table.

Claims (1)

[Claims] In a stand-alone dump processing method for collecting dump data when a system goes down, a first method for identifying paged-out data on an external storage device (2) in a space that was operating at the time of a system down. Specific means (13)
), and a second specifying means (14) for specifying data paged out on the external storage device (2) of the global service space.
), when the system goes down, the data developed on the real memory (10) is dumped to the dump file (3), and the data identified by the first and second identifying means (13, 14) is exported to the external device. A stand-alone dump processing method characterized by comprising a dump processing means (15) for reading data from a storage device (2) and dumping it into a dump file (3).