JPH0528037A - Buffer control system - Google Patents

Abstract

PURPOSE:To grasp the operating state of a buffer by tracing buffer request information between a buffer request source and a buffer address for each buffer request. CONSTITUTION:A buffer request reception means 3 of a main storage device 1 receives buffer request from a request source group 2. If it is a buffer acquisition request, a buffer acquisition means 8 acquires a buffer from a buffer group 14 of a buffer control table 13 through a buffer acquisition request reception means 4. If it is a buffer release request, a buffer release means 9 releases a buffer through a buffer release request reception means 5. A trace information writing means 10 writes trace information on acquiring and releasing a buffer in a buffer trace area 11, writing it out on an external storage device 12 every time the area is written up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buffer management system, and more particularly to a buffer management system for managing a buffer in a main memory of an information processing system.

[0002]

2. Description of the Related Art A conventional buffer management system has a buffer pool that manages a predetermined number of buffers, and when there is a buffer in the buffer pool for the request source buffer request, the buffer is immediately opened. I was giving.

[0003]

The above-mentioned conventional buffer management system gives a buffer immediately when there is a buffer pool when making a buffer request to a buffer pool which manages a predetermined number of buffers. However, since it leaves no information, it has the drawback that it cannot judge the usage status of the buffer.

[0004]

According to the buffer management method of the present invention, a buffer request received from a request source is sorted according to a request type, and when the buffer request is an acquisition request, the buffer acquisition request is controlled and exists for each buffer type. Separate the required number from the buffer pool linked to the buffer management table and give it to the request source, write the request source at that time and the buffer address to be given to the buffer trace area, and when the buffer request is a release request, release the buffer. Control the release request buffer linked to the buffer management table, write the request source at that time and the buffer address to be released to the buffer trace area, as soon as the buffer trace area in the main storage device is full, It is configured by writing to an external storage device.

[0005]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the buffer management system of the present invention. As shown in FIG. 1, the main storage device 1 according to the present embodiment has a buffer request receiving unit 3, a buffer acquisition request receiving unit 4, a buffer release request receiving unit 5, and a buffer request receiving unit 3, which receives a buffer request from a request source group 2. When the acquisition is possible, the buffer acquisition information trace request means 6 that sorts out the buffer acquisition information and makes a buffer trace request, and the buffer trace area 11 is filled when the buffer trace request is received and the buffer trace area 11 becomes full, and then the external storage device 12 Trace information writing means 10 for writing information, buffer release information trace request means 7 for organizing the buffer release information and releasing a buffer trace request when releasing the buffer,
It includes a buffer acquisition means 8 for acquiring a buffer from the buffer group 14 linked to the buffer management table 13, and a buffer release means 9 for releasing the buffer acquired by the buffer acquisition means 8.

FIG. 2 is a diagram showing an example of the buffer trace area 11 used in this embodiment. The trace information writing means 10 in the present embodiment includes the trace first area start address 21, the trace first area end address 22, the trace second area start address 23, the trace second area end address 24, the current trace area address 25, and the trace. The buffer trace area 11 having the first area 26 and the trace second area 27 is controlled.

Then, the trace information writing means 10
Starts writing buffer trace information from the position of the first address 21 of the trace first area, updates the current trace area address 25, and updates the current trace area address 2
If 5 becomes the same as the end address 22 of the first trace area, the first trace area 26 is regarded as full and the contents of the first trace area 26 are flushed to the buffer trace information file 28 of the external storage device 12. Further, the trace information writing means 10 restarts from the position of the trace second area start address 23 without waiting for the completion of the sweep to the external storage device 12, and writes the buffer trace information in the trace second area 27.

If the current trace area address 25 is also updated and the current trace area address 25 becomes the same as the trace second area end address 24, the trace second area 27 is regarded as full and the contents of the trace second area 27 are considered. To the buffer trace information file 28 of the external storage device 12. The trace information writing means 10 restarts from the position of the trace first area start address 23 without waiting for the completion of the sweep to the external storage device 12. The buffer trace is controlled by repeating the above.

FIG. 3 is a flow chart showing an example of the processing of this embodiment. When the request source of the request source group 2 makes a buffer request of A number of buffer requests, the control is passed to the buffer request receiving means 3, the request type is judged, and the buffer acquisition request receiving means 4 or the buffer is received according to the request content. Control is passed to the release request receiving means 5 (step 30).

Therefore, the buffer acquisition request receiving means 4
First transfers control to the buffer acquisition means 8. The buffer acquisition unit 8 determines whether or not the buffer can be acquired from the buffer management table 13 (step 31), and if not, notifies the request source that the buffer cannot be acquired (step 38). If the buffer can be acquired, the buffer group is acquired from the buffer group 14 linked to the buffer management table 13 (step 32).

After that, the control returns to the buffer acquisition request reception means 4 and the buffer acquisition information trace request means 6
Control passes. Buffer acquisition information trace requesting means 6
Requests the request source information and all acquired buffer dresses, and requests the trace information writing means 10 to trace the information. Trace information writing means 10
Traces the passed information to the buffer trace area 11, writes it to the external storage device 12 when the current trace area is full, and switches the current trace area (steps 33, 34, 35, 36). Then, the buffer acquisition completion notification is issued to the request source of the request source group 2 (step 37).

When the request type is a release request and control is passed to the buffer release request receiving means 5, the buffer release request receiving means 5 passes control to the buffer release information trace requesting means 7. The buffer release information trace requesting means 7 obtains request source information and all buffer addresses to be released, and requests the trace information writing means 10 to trace the information. The trace information writing means 10 stores the passed information in the buffer trace area 1
When the current trace area is full, it is written to the external storage device 12 and the current trace area is switched (steps 39, 40, 41, 42).

Thereafter, the control returns to the buffer release request receiving means 5 and the control is passed to the buffer releasing means 9. The buffer release means 9 releases the release-requested buffer into the buffer group 14 linked to the buffer management table 13 (step 43). Then, a buffer release completion notification is issued to the request sources of the request source group 2 (step 4).
4).

[0015]

As described above, the buffer management system of the present invention traces the buffer request information of the buffer request source and the buffer address for each buffer request, so that the usage status of the buffer can be immediately known. have.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a buffer management system of the present invention.

FIG. 2 is a buffer trace area 1 used in this embodiment.
It is a figure which shows an example of 1.

FIG. 3 is a flowchart showing an example of processing of this embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 main memory device 2 request source group 3 buffer request acceptance means 4 buffer acquisition request acceptance means 5 buffer release request acceptance means 6 buffer acquisition information trace request means 7 buffer release information trace request means 8 buffer acquisition means 9 buffer release means 10 trace information Writing means 11 Buffer trace area 12 External storage device 13 Buffer management table 14 Buffer group 21 Trace first area start address 22 Trace first area end address 23 Trace second area start address 24 Trace second area end address 25 Current trace area address 26 first trace area 27 second trace area 28 buffer trace information file

Claims (1)

What is claimed is: 1. A buffer request accepted from a request source is distributed according to a request type, and when the buffer request is an acquisition request, the buffer acquisition request is controlled, and each buffer type exists and is linked to a buffer management table. The required number is given to the request source from the buffer pool, and the request source at that time and the buffer address to be given are written to the buffer trace area. When the buffer request is a release request, the buffer release request is controlled and the release request is issued. Link the above buffer to the buffer management table, write the request source at that time and the buffer address to be released to the buffer trace area, and write to the external storage device as soon as the buffer trace area in the main storage device is full. A buffer management method characterized by.