JPH04237355A - Buffer management system - Google Patents

Abstract

PURPOSE:To remarkably and efficiently utilize a memory resource. CONSTITUTION:In the case of transferring data from a processor 3 to a processor 2 in a system constituted of the processors 2, 3, management information 7 including the length of transfer data and the number of data is transmitted between both the processors 2, 3 and a module (A) 4 is received from a module (B) 5 before data transfer. The processor 2 secures a full transaction buffer group 8 in which the specified number of buffers having different sizes is set up based upon the management information 7, forms a buffer management table 6 for managing the buffer group 8 and manages transaction data based upon the table 6 and the buffer group 8.

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 transferring data between processors.

0002

[Prior Art] Conventionally, this type of management method for data transferred between processors uniformly allocates a plurality of buffers for the maximum length of data to be transferred, and uses these buffers to manage data. It was the way to do it.

0003

[Problem to be Solved by the Invention] The conventional buffer management method described above secures multiple buffers with a uniform maximum length and uses these to manage received data. If the size becomes large, a large amount of small data will be transferred and managed in a buffer corresponding to this maximum length, and there will be a large amount of empty space in the management buffer area, resulting in the disadvantage that memory resources cannot be used effectively.

0004

[Means for Solving the Problems] The buffer management method of the present invention is a buffer management method for exchanging data between processors, and is a buffer management method for transmitting and receiving data between processors by transmitting management information including the length and number of data to be exchanged. A specified number of buffers of different sizes are secured based on the management information received before delivery, a buffer management table is created to manage the buffers, and the received data is managed based on the information in the buffer management table. It has a configuration.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

The embodiment shown in FIG. 1 includes a system 1 including two processors 2 and 3, a processor 2 for receiving data, a processor 3 for delivering data, and a module (B) 5 of the processor 3. and the management information 7 of the transferred data, and the module of the processor 2 (A
) 4, a total transaction buffer group 8 secured based on management information 7, and a buffer management table 6 for managing this buffer group.

Next, the operation of this embodiment will be explained.

First, the basic features of the operation of this embodiment will be explained.

The module (A) 4 of the processor 2 that manages the buffer is connected to the module (A) 4 of another processor 3
B) Receive the sizes and respective numbers of different buffers as buffer management information from 5 before handing over the data, secure the entire transaction buffer group 8 in which the specified number of buffers of different sizes are set based on this information, and A buffer management table 6 is created as a table for managing the buffers.

[0011] When data is received, the module (A) 4 is able to always retrieve the data into an empty maximum length buffer, and then manage the data by referring to the data size stored at the beginning of the retrieved data. Search the information in the management table 6 for the buffer with the least amount of waste,
Transfer and manage data to this buffer.

Next, the operation of each part of the embodiment shown in FIG. 1 will be explained.

[0013] Module (A) 4 determines the maximum length and number of collection data necessary for this system 1 to operate,
Management information 7 is secured that includes the size and number of buffers for managing small data, the intermediate value between these two sizes, and the number of buffers. This means that module (B) 5 must
This is done by transmitting the information to 4.

Next, as shown in FIG.
) 4 secures three types of buffers (x1) 8a, buffers (x2) 8b, and buffers (x3) 8c of different sizes based on the management information 7, and further creates the buffer management table 6. do.

FIG. 2 is an example of the buffer management table 6 and all collection buffer group 8 in FIG. Here is an example composed of flags.

[0016] In addition, buffers (8a, 8b, 8c) (
×1), (×2), and (×n) are sets of buffers of each size.

When the module (A) 4 receives data from the processor 3, the module (A) 4 receives the data using an empty buffer in the maximum length buffer (x3) 8c. The size of the data stored at the beginning of this data and the buffer size generated in the buffer management table 6 are compared in ascending order with the size of the size ascending order table 9, and the smallest buffer size from which data can be taken is determined. Then, an empty buffer is searched from among the buffer management information 10a to 10n for managing buffers of this size, and data is received and managed using that buffer. In this way, a collection of buffers of different sizes is managed using one buffer management table 6.

FIG. 3 is a flowchart showing the operation of this embodiment.

At step 101, module (A) 4 receives buffer management information 6 from module (B) 5. According to this information, the module (A) 4 secures takeover buffers in step 102, and creates a buffer management table 6 for these in step 103.

Furthermore, module (A) 4 performs step 1
04 waits for processing related to buffer management, and when a transfer process occurs, searches for a transfer buffer as in steps 105 and 106, performs data transfer management in step 107, and releases the buffer 109 when data transfer is NO. The end of step 108 is seen as follows.

[0021]

[Effects of the Invention] As explained above, the present invention transmits information for managing retrieved data when exchanging data between processors, secures retrieved buffers based on this information, and manages these buffers. By creating a buffer management table for data collection and managing the collection data based on the information in this buffer management table, it is possible to reduce wasted area in the collection buffer and use memory resources significantly more effectively. be.

[Brief explanation of the drawing]

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

FIG. 2 is a configuration diagram of the buffer management table 6 and all collection buffer group 8 in FIG. 1;

FIG. 3 is a flowchart showing the operation of the embodiment of FIG. 1;

[Explanation of symbols]

1 System 2,3 Processor 4 Module (A) 5 Module (B) 6 Buffer management table 7 Management information 8　　　　All collection buffer group

Claims (1)

[Claims] Claim 1: A buffer management method for exchanging data between processors, wherein management information including the length and number of exchanged data is transmitted between the processors and received before the data is transferred, and the size is determined based on the management information. 1. A buffer management method characterized by securing a specified number of buffers with different numbers, creating a buffer management table for managing the buffers, and managing received data based on information in the buffer management table.