JP2788844B2 - System dump collection system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system dump collection system for dumping system data stored in virtual storage.

[0002]

2. Description of the Related Art In a conventional method of collecting a system dump in virtual storage, referring to FIG. 7 illustrating a conventional page information table, a busy bit 64 in a page information table of a management structure for managing a physical page is used. Physical pages are collected sequentially from the low order. The busy bit 64 is an index indicating that the corresponding physical page stores system data. Therefore, it is not possible to select only the physical page that stores the desired system data by using only the in-use index, and all the physical pages having the in-use bit 64 are dumped to the dump file. Become a lot. Further, even when performing data compression to reduce the amount of data to be dumped, the data amount of the dump data is large, so that the processing time increases.

[0003]

SUMMARY OF THE INVENTION In order to reduce the amount of system dump data, only desired system data can be dumped. Therefore, an item indicating the purpose of use of the physical page is provided in the page information table of the management structure that associates the physical page with the logical page.

[0004] The physical page to be dumped can be selected by referring to the item for the purpose of use.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a page information table which is a management structure for managing physical pages, by using an item indicating the purpose of use of each physical page.
An object of the present invention is to provide a system dump collection system that selects system data to be dumped and reduces the amount of data to be dumped.

Therefore, the system dump collection system of the present invention, when a request to map or unmap a physical page of a storage area to a logical page in virtual storage is made, stores the page address of the physical page and the purpose of use in a page information table. Means for setting a bit, and when a request is made to perform a system dump collection of a physical page including system data stored in the storage area, referring to a page address and a use bit of the page information table, Means for selecting a page, sequentially obtaining the data, and storing dump data obtained by adding a page address and data length data of the physical page to data stored in the physical page in a dump file of an auxiliary storage area; and No request for dump analysis The page address of the dump data stored in the dump file,
Means for initializing a dump information table including an address in a file and a link pointer as its own chain information, and initializing a link pointer as chain information of each area of the buffer storing the dump data; The dump data is sequentially acquired from the dump file according to the file address and the link pointer of the dump information table, and the page address of the dump data, a link pointer which is chain information of each area of the buffer, and a buffer. Means for obtaining buffer data by adding control information to the data of the dump data, and outputting the buffer data to an area of the buffer;
including.

[0007]

The purpose bit provided in the page information table is an index indicating which of the system kernel code, kernel stack, kernel data, file mapping and user data is stored in the logical page of the page information table. is there. In the operating system of the system processing unit, the logical pages of the virtual memory for storing the kernel code, kernel stack, kernel data, file mapping, and user data described above are predetermined. Therefore, the physical page for acquiring the system data necessary for the failure analysis can be acquired by referring to the item of the purpose of use of the page information table.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings.

Referring to FIG. 1 showing the configuration of an embodiment of the present invention, this embodiment is configured to execute a control program or a user program, or a system processing unit 1 for executing an interrupt due to occurrence of an event, and a system processing unit. 1, a system dump collection unit 2 that operates in response to a request for mapping and unmapping, and a request for dump collection and dump analysis, and a storage including an internal storage area 3 and an auxiliary storage area 4 including a physical page to be system dumped. Region 5.

The system dump collection unit 2 receives a mapping or unmapping request, and receives a dump collection request, a page information setting unit 7 for setting a page address and a usage bit of a physical page in a page information table 6. Scans the intended use bit of the page information table 6,
A page information table reference section 8 to be referred to, a page selection section 9 for selecting a physical page based on a use purpose bit, a selected physical page is obtained from the storage area 5 by a page address, dump data is created, and the auxiliary storage area 4 is created. Dump page storage 11 to be stored in the dump file 10
And dump data analysis request, dump file 1
An initialization unit 14 for initializing a dump information table 12 including a link pointer for taking a chain of 0 dump data, and initializing each area of a buffer 16 for storing the dump data; a dump information table 12 and a buffer 16 Refer to the link pointer of each area of the dump file 10
And a dump file output unit 15 that acquires dump data from the buffer 16 and stores it in the area of the buffer 16.

The internal storage area 3 of the storage area 5 is provided with a page information table 6, a dump information table 12, and respective areas of a buffer 16 divided into sections. In the auxiliary storage area 4, an area for the dump file 10 is provided.

Next, referring to FIG. 2 exemplifying the page information table 6, FIG. 3 exemplifying the dump information table 12, FIG. 4 exemplifying the format of the dump data, and FIG. 5 exemplifying the format of the buffer data, Page information table 6
Indicates an in-use bit 61 indicating whether or not each physical page of the storage area 5 is in use, a use purpose bit 62 indicating a use purpose of data stored in the physical page, and an address of the physical page. Page address 63. The dump information table 12 includes a page address 121 indicating a physical location of the physical page in the storage area 5, a file offset 122 indicating a file address of a location to be stored in the dump file, and a link pointer indicating a link of the dump information table 12 itself. 123. Dump data 2 for each page stored in the dump file 10
0 is a page address 201 indicating the address of the physical location in the storage area of the physical page, data 203 stored in the page, and data length data 2 indicating its length
02. The buffer data 30 stored in the buffer 16 includes a page address 301 indicating the actual location of the page in the storage area, control counter data 302 for controlling data exchange of each area of the buffer, and a chain of each area of the buffer 16. Link pointer 303 indicating
And a hash link pointer 30 for a chain search.
4 and data 305.

Next, the operation of collecting a system dump in the embodiment shown in FIG. 1 will be described with reference to FIGS. When the system processing unit 1 issues a mapping request for associating a physical page in the storage area 5 with a logical page of virtual storage, the page information setting unit 7 is activated, and the page information setting unit 7 maps the physical page to the logical page, The page address 63 and the purpose bit 62 are set in the page information table 6. The purpose bit 62 is uniquely determined by a logical page defined by an operating system that stores kernel code, kernel stack, kernel data, file mapping, and user data. Further, in response to the unmapping request from the system processing unit 1, the page information setting unit 7 cancels the setting of the page address 63 and the use purpose bit 62 of the page information table 6. When the system processing unit 1 detects a system failure and makes a dump request to the system dump collection unit 2, the page information table reference unit 8 is activated. The page information table reference section 8 scans the page information table 7. Then, the page selection unit 9 selects a physical page having a use purpose necessary for the fault detection by scanning, and acquires the page address. The dump page storage unit 11 obtains the dump page 72 from the page image 71 of the storage area by the page address, adds the page address 201 and the data length data 202 to the data 203 of the page, and outputs the dump image of the dump data 20. 72 is written to the dump file 10 as a dump file image 73.

When the system processing unit 1 issues a dump data analysis request, the initialization unit 14 is started. The initialization unit 14 scans the dump data of the dump file 10, initializes the page address 121, the file address 122, and the link pointer 123 of the dump information table 12,
The control counter data 302, the link pointer 301 for managing the chain, and the hash link pointer 304 of each area of the buffer 16 are initialized.

Next, the dump file output unit 15 refers to the dump information table 12 and stores the dump data to be analyzed specified by the above-described dump data analysis request from the dump file 10 into the buffer 16 area in the buffer 16 area.
And store it.

[0016]

As described above, according to the present invention, when a system dump is collected, a physical page including system data existing in a storage area is selected according to its use purpose, and only a page necessary for failure analysis is selected. Can be dumped, so that a system dump can be efficiently collected.

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating a page information table.

FIG. 3 is a diagram illustrating a dump information table.

FIG. 4 is a diagram illustrating an example of dump data stored in a dump file.

FIG. 5 is a diagram illustrating buffer data stored in a buffer;

FIG. 6 is a diagram illustrating a system dump collecting operation of the embodiment of FIG. 1;

FIG. 7 is a diagram illustrating a conventional page information table.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 System processing part 2 System dump collection part 3 Internal storage area 4 Auxiliary storage area 5 Storage area 6 Page information table 7 Page information setting part 8 Page information table reference part 9 Page selection part 10 Dump file 11 Dump page storage part 12 Dump information Table 14 Initialization unit 15 Dump file output unit 16 Buffer

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-125236 (JP, A) JP-A-3-127136 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G06F 11/30-11/34

Claims (3)

(57) [Claims] 1. A means for setting a page address and a use bit of a physical page in a page information table when a request is made to map or unmap a physical page in a storage area to a logical page in virtual storage. When a request to perform a system dump collection of a physical page including system data stored in the area is made, the physical page to be system dumped is selected by referring to the page address and the purpose bit of the page information table, and sequentially acquired. Means for storing dump data obtained by adding the page address and data length data of the physical page to the data stored in the physical page in a dump file in an auxiliary storage area, and when a request for dump analysis is made , Stored in the dump file The dump information table including the page address of the dump data, the address in the file, and the link pointer as its own chain information is initialized, and the link pointer as the chain information of each area of the buffer storing the dump data is initialized. The dump data is sequentially acquired from the dump file according to the in-file address and the link pointer of the dump information table, and the page address of the dump data and the chain information of each area of the buffer are obtained. A buffer pointer is obtained by adding a link pointer, and buffer control information to the data of the dump data,
Means for outputting the buffer data to the area of the buffer. 2. A request for mapping or unmapping based on an operation of a control program, an operation of a user program, or an interrupt due to an event occurrence, and a request for collecting the system dump based on a user program, or A system processing unit that issues a request for dump analysis; a unit that sets the purpose bit in the page information table by the mapping and unmapping request; and a dump data to be system dumped by the dump collection request. Means for storing in the dump file, means for initializing the dump information table and the link pointer of the buffer for outputting a desired page in response to the dump analysis request, and means for outputting the dump data to the buffer And run A system dump collection unit; a physical page including the system data; an internal storage area for storing a page information table, a buffer and a dump information table; and an auxiliary storage area for storing a dump file. The system dump collection system according to claim 1, wherein: 3. A means for storing in the dump file,
The page information table is scanned, and a page information table reference unit that refers to the usage bit, a page selection unit that selects a dump page according to the usage bit, and the selected dump page is stored in the dump file. 2. The system dump collection system according to claim 1, further comprising: a dump page storage unit.