JPS62216060A - Buffer control system - Google Patents

Abstract

PURPOSE:To quickly eliminate faults related to a buffer by recording previously the module address that secured last the buffer and and the module address that released the buffer. CONSTITUTION:A buffer control module 3-1 of a communication control processor 3 allocates an idle buffer 1-1 to the module 3-1 when a buffer securing request is received and at the same time stores the address of the module that delivered the securing request in a requester address store area 2-1 of the buffer 1-1. When prescribed communication control processing is ended, the module 3-1 that received a release request to the buffer 1-1 releases this buffer 1-1 and at the same time stores the address of the module received the release request in a requester address storage area 2-2 of the buffer 1-1. In such a way, it is possible to detect quickly the factors of the faults related to buffers 1-1-1-n.

Description

[Detailed Description of the Invention] [Summary] This invention stores the request source information that secured each buffer in the buffer pool and the release source information that released it in each buffer, thereby ensuring that the buffer is secured at the end. By making the module address and the released module address known, buffer-related failures can be quickly resolved.

[Industrial application field]

The present invention relates to a buffer management method for a communication control system having a buffer pool.

[Conventional technology]

In conventional communication control processing units (CCPs), an area in a storage device excluding areas occupied by programs and tables is reserved as a buffer pool.

It is made available by dividing it into multiple buffers.

When performing communication control processing with this device, by securing the divided buffers when they are needed and releasing them when they are no longer needed, the buffers can be used efficiently with limited storage capacity. I have to.

[Problem that the invention seeks to solve]

By the way, if multiple programs repeatedly allocate and release multiple buffers in the buffer pool, the buffers may become suspended for some reason.
Alternatively, a failure may occur, such as a reserved buffer being released due to a failure in another program.

In order to resolve such failures, it is necessary to sequentially investigate which program caused the failure, and conventionally there has been a problem in that this requires a large amount of time.

[Means for solving problems]

In order to solve the above-mentioned problem, the present invention stores, for each buffer in the buffer pool, request source information that secured the buffer and release source information that released the buffer.

Means for solving the problems will be explained using the configuration of one embodiment of the present invention shown in the figure.

In the figure, a buffer pool 1 is composed of buffers l) 1-1 to buffers (n) 1-n divided into one. Buffer (i) in this buffer pool 1
l-i is allocated (secured) when it becomes necessary to control one communication, and is released when it becomes unnecessary.

The request source address storage area (secured) 2-1 and the request source address storage area (released) 2-2 contain information about the reservation requester who requested reservation in buffer (1) l-1 to buffer (n) l-n. This area stores information about the release request source and the release request source that made the release request.

The buffer management module 3-1 secures/releases the divided buffer (1) 1-1 to buffer (n) 1-n, and the request source address storage area (secured) 2-1 and the request source address storage area ( (release) 2-2, performs management such as storing the module addresses for which reservation/release requests have been made.

[Effect]

When the configuration explained using the diagram is adopted and a buffer reservation request is made to the buffer management module 3-1,
The buffer management module 3-1 allocates (reserves) the empty buffer (i) 1-i, and also allocates (reserves) the buffer (i) 1-i.
i) The module address requested to be secured is stored in the request source address storage area (reserved) 2-1 in 1-i.

Next, the predetermined communication control process ends and this buffer (
i) The buffer 1 management module 3-1 that has received the release request for 1-i releases the buffer (i) 1-i and also stores the request source address storage area (i) of the buffer (i) 1-i. Release) The module address for which the release request was made is stored in 2-2.

As described above, when buffer (i) l-i is reserved and released, the module address of the request source is specified respectively.

Request source address storage area 2 in that buffer (i) 1-i
By storing it in -1.2-2.

When a failure occurs in buffer (1) 1-1 to buffer (n) 1-n due to some cause, it becomes possible to quickly investigate the cause of the failure.

〔Example〕

Next, the configuration and operation of one embodiment of the present invention will be explained using FIG.

In the figure, buffer pool 1 is an area excluding the area containing the device, which is composed of buffers (1) 1-1 to buffers (n) 1-n, which are necessary when performing 2 communication control processing as described above. be. This buffer (1) 1
-1 to buffer (n) 1-n. As shown in the figure, a chain is used to connect buffers together in a chain. Request source address for which a reservation request was made (reserve) 2-1, request source address for which a release request was made (release) 2-2. Each storage area is provided, such as an offset (address) indicating the storage area of data, and a count indicating the number of bytes of data storage.

The request source address storage area (reserved) 2-1 and the request source address storage area (released) 2-2 are the buffer (+) 1-2.
When a reservation request and a release request are made to i. This area stores the module address of each request source.

The buffer management module 3-1 manages the buffer (1) 1-
1 or buffer (n) 1-n is secured/released. and request source address storage area 2-1.

The module address of the request source is written in 2-2.

Channel 3-2 is. It controls communication between the host 4 and the communication control processing device 3.

The line control section 3-3. It controls communication between the terminal devices 5-1 to 5-n and the communication control processing device 3.

The BSC 3-4 and the HDLC 3-5 execute communication procedures when the line control unit 3-3 communicates with the terminal devices 5-1 to 5-n, respectively, to establish a communication line and perform communication. belongs to.

Next, the operation will be explained in detail.

In order to communicate between the channel 3-2 and the host 4 or between the line controller 3-3 and the terminal devices 5-1 to 5-n, a buffer i) When there is an establishment request of 1-i, the buffer management module 3-1.

Along with allocating unused buffers (i) 1-i.

The module address for which the reservation request was made is stored in the buffer (
i) Store in the request source address storage area (reserved) in 2-1 in 1-i. The module that issued the buffer establishment request is. Buffer (i) 1-Start address for storing data in the offset storage area in i. and store the number of bytes to store data in the count storage area. Execute predetermined communication control processing. Next, the communication control process ends.

Buffer (i) for buffer management module 3-1
When there is a request to release l-i. The buffer management module 3-1 is. While releasing buffer (+)1-i,
The module address for which the release request was made is stored in the buffer (
+) Store in request source address storage area (release) 2-2 in 1-i.

As described above, each time there is a reservation request for buffer (i) 1-i, the module address that issued the reservation request is transferred to the request source address storage area (lI1) in buffer (i) 1-i. Maintenance) 2-1 and store it. Also, after completing a predetermined communication control process.

Every time there is a release request for buffer (+) 1-i, the module address that issued the release request is stored in the buffer (+) 1.
Store in the request source address storage area (released) 2-2 in -i.

As a result, buffer (1) 1-1 to buffer (n
) l-n, it is immediately possible to know the last reserved module address and the released module address.

〔Effect of the invention〕

As explained above. According to the present invention, the request source information that secured each buffer in the buffer pool and the release source information that released it are stored in each buffer. You can easily know the module address where the buffer was last allocated and the module address where it was released. This will help you if a buffer-related problem occurs. This makes it possible to resolve problems early.

[Brief explanation of drawings]

The figure shows a configuration diagram of one embodiment of the present invention. In the figure, 1 is the bathofa pool. 1-1 to 1-n are bath sofas, 2-1 is a request source address storage area (reserved), 2-2
is the request source address storage area (released). 3-1 represents a buffer management module.

Claims (1)

[Claims] A communication control system that secures a buffer from a buffer pool in response to a communication request and releases the secured buffer upon completion of communication, comprising: a plurality of buffers (1-1) provided in a buffer pool (1);
i), the reservation request source information that requested the reservation of the buffer (1-i) placed in this buffer (1-i), and the release request source information that requested the release of the buffer (1-i), respectively. A buffer management module (3) that secures and releases the buffer (1-i) based on the reservation/release request source information storage area (2) and the reservation request and release request for the buffer (1-i). -1), and the buffer management module (3-1) comprises a buffer (
Based on the reservation request for 1-i), the buffer pool (
1) Secure a predetermined buffer (1-i) from among them, and write the reservation request source information into the reservation/release request source information storage area (2) provided in this secured buffer (1-i), Based on the release request for the buffer (1-i), the buffer management module (3-1) releases the corresponding buffer (
1-i) and this freed buffer (1-i
) A buffer management method characterized by controlling to write release request source information into a reservation/release request source information storage area (2) provided in ).