JP2590859B2 - Memory management method for communication processing in information processing equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing device connected to a communication processing device via a communication line, and particularly to a case where data is transmitted / received to / from the communication processing device. The present invention relates to a method for managing a memory for a necessary communication process.

[Conventional technology]

In an information processing device that transmits and receives data to and from a communication processing device such as a terminal device or an information processing device via a communication line, data to be transmitted to the communication processing device and data received from the communication processing device are temporarily stored in a communication processing process. In general, a part of the main storage of the information processing apparatus is used for this memory area. in this case,
The main memory of the information processing apparatus is used not only for communication control but also for various other controls and processes. Therefore, a certain area of the main memory is obtained as a memory area used for communication processing. Management is required, and the following two methods are conventionally known as such a memory management method.

(1) A method in which a memory area of a capacity necessary for the current data transmission / reception is sequentially acquired from the main storage device every time data transmission / reception is performed in communication control of the information processing device.

(2) A maximum memory capacity required for communication control at the time of data transmission / reception, for example, a memory area having a capacity corresponding to the maximum traffic is collectively acquired when the communication control unit in the information processing apparatus is started, and actual data is acquired. A method that uses a part of this acquired memory area during transmission and reception.

[Problems to be solved by the invention]

However, the above-described conventional method has the following disadvantages.

Generally, acquiring a memory area of a certain capacity from the main storage device requires some time since the main storage control unit constituting the operating system needs to be interposed. Therefore, the conventional method (1) in which, every time data is transmitted and received in the communication control of the information processing device, a main storage device is requested to be allocated and a memory area of a capacity necessary for the current data transmission and reception is sequentially acquired from the main storage device. In such a case, it takes time until the memory area can be used, and the efficiency of data transfer is reduced.

On the other hand, in the conventional method (2) in which a memory area having a maximum capacity required for communication control at the time of data transmission / reception is collectively acquired when the communication control unit of the information processing apparatus is started, the conventional method (2) requires Since the memory area has already been acquired, the data transfer efficiency can be prevented from lowering as in the conventional method (1), but the ratio of the part of the acquired memory area that is actually used for data transmission and reception is There is a disadvantage that it is difficult to effectively use the main storage device because it is small on average. As an improvement of the above conventional method (2), it is conceivable to reduce the capacity of the memory area acquired collectively. However, when the traffic increases, the memory area becomes insufficient, and communication processing cannot be performed. Problems arise.

The present invention has solved such a conventional disadvantage, and its object is to prevent a decrease in the efficiency of data transfer,
It is an object of the present invention to provide a memory management method capable of effectively using a main storage device by dynamically managing a communication memory capacity.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a memory management system for a communication process in an information processing device that performs data communication with a communication processing device via a communication line, wherein management of a communication processing memory area acquired from a main storage device is performed. A management table for storing information, and a memory area having a capacity corresponding to the average traffic is acquired from the main storage device through a main storage control unit constituting a part of the operating system before starting data communication in the information processing device. Acquiring means for updating a table; determining means for determining whether or not there is a free memory area having a capacity required for the data transmission and reception at the time of actual data transmission and reception by referring to the management table; When it is determined that the data is present, the management table is referred to and the free space of the capacity necessary for the current data transmission / reception is obtained. Memory fetching means for providing the memory area for communication processing, and expansion means for acquiring a new memory area for communication processing from the main storage device through the main storage control unit when the free memory area is insufficient, and updating the management table. And memory adding means for updating the management table based on the memory area used when data transmission / reception is completed.

[Action]

Prior to the start of data communication in the information processing apparatus, a memory area having a capacity corresponding to the average traffic is obtained from the main storage device by the obtaining means, and that fact is registered in the management table. Thereafter, at the time of actual data transmission / reception, the determination unit determines whether or not there is an empty memory area having a capacity necessary for the data transmission / reception.
By the memory extracting means, a free memory area having a capacity necessary for the current data transmission / reception is provided for communication processing. Also,
When the available memory area is small, a new memory area is acquired from the main memory by the expansion means, and the acquisition of the memory area by the memory fetch means is guaranteed. When the data transmission / reception is completed, the memory area used for the data transmission / reception becomes used. Therefore, the management table is updated by the memory adding means, and the free memory area is increased.

〔Example〕

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

FIG. 2 is a block diagram showing a configuration example of a data communication system to which the present invention is applied. In the figure, an information processing apparatus 100 and a communication processing apparatus 120 are connected via a communication line 110, and the information processing apparatus 100 includes a communication service unit 101 such as an application program, a communication management unit 102, and a communication memory management unit 103. And a main memory control unit 104, a communication control unit 105, and a main memory 106 which constitute a part of the operating system.

FIG. 1 is a block diagram of an embodiment of the communication memory management unit 103, which includes a base memory securing unit 21 and a command receiving unit 22.
The command determining means 23 and the memory capacity determining means 24 include a memory adding means 25, an extended memory securing means 26, a memory fetching means 27, an acquired memory management table 28, and an acquired memory releasing means 29. I have.

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

In FIG. 2, the information processing device 100 and the communication processing device 120
When performing data communication with the
A communication start command is passed from 1 to the communication management unit 102.

When the communication management unit 102 receives the communication start command, the communication control unit 105 transmits the data received from the communication processing device 120 to the communication service unit 101, or the data transmitted by the communication service unit 101 to the communication processing device 102. Communication memory management unit in order to obtain a minimum amount of base memory required for passing the communication control unit 105 to the communication control unit 105, for example, a base memory having a capacity corresponding to the average traffic.
The base memory allocation request instruction is passed to 103.

The base memory reservation request command from the communication management unit 102 is
The command is received by the command receiving means 22 shown in FIG. Instruction determination means 23
Starts the base memory securing means 21 when the received command is the base memory securing request command, and in response, the base memory securing means 21
When a request for acquiring a predetermined capacity of the base memory is issued from the main memory 106 to the main memory 4 and the memory area of the main memory 106 requested as the base memory is notified from the main memory control unit 104, the position information and the like are managed. The information is registered in the acquisition memory management table 28.

Thereafter, when the communication management unit 102 receives a data transmission request command from the communication service unit 101 or receives a data reception request command from the communication control unit 105, the communication management unit 102 transmits the data of the communication service unit 101 by this data transmission. The communication control unit 1
In order to obtain the data memory of the capacity required to pass the data received by the communication control unit 105 to the communication service unit 101 by passing the data to the communication service unit 101 by receiving the data at this time or by acquiring the data memory designated by the data memory capacity The command is passed to the communication memory management unit 103.

In the communication memory management unit 103, the data memory acquisition instruction is received by the instruction receiving means 22, and the instruction determination means 23 determines that the received instruction is a data memory acquisition instruction by giving necessary information to determine the memory capacity. Activate means 24.

When activated, the memory capacity determination unit 24 determines whether a data memory of the capacity requested by the current data memory acquisition instruction can be allocated from a vacant area in the already acquired base memory. Activate the memory extracting means 27.

In response to this, the memory extracting unit 27 determines the data memory to be allocated this time with reference to the acquired memory management table 28, and notifies the communication management unit 102 of the position information and the like. Then, the memory area corresponding to the currently allocated data memory portion is updated to the allocated area.

On the other hand, when the memory capacity determination unit 24 determines that it is impossible to allocate the data memory of the capacity requested by the data memory acquisition command from the already acquired base memory,
First, the extended memory securing means 26 is activated, and upon completion of the processing, the memory extracting means 27 is activated.

When the extended memory securing means 26 is activated, the main memory control unit
By issuing a request for acquiring a new base memory to the memory 104, for example, one new extended memory having a capacity smaller than that of the base memory and having a capacity sufficient for a plurality of data transmission / receptions is acquired. Management table 28
Register with. Thereafter, when the memory removal means 27 is started by the memory capacity determination means 24, the memory removal means 27 determines the data memory to be allocated this time from the base memory or the extended memory by the same processing as described above, and manages the position information and the like for communication management. In addition to notifying the unit 102, the acquired memory management table 28 is updated.

When the data memory is received from the communication memory management unit 103 by the processing described above, the communication management unit 102 uses the data memory to pass data from the communication service unit 101 to the communication control unit 105, or to perform communication control. Department 105 to Communications Business Department 1
Pass data to 01. When the data transmission / reception is completed, the used data memory becomes unnecessary, so that a data memory return instruction designating the used data memory is passed to the communication memory management unit 103.

In the communication memory management unit 103, when the data memory return instruction is received by the instruction receiving means 22 and the instruction determination means 23 determines that the received instruction is Activate means 25.

In response to this, the memory adding means 25 updates the management information of the corresponding data memory corresponding portion in the acquired memory management table 28 to an empty state, and returns it to the base memory or the extended memory as a used data memory empty area. I do.

The above processing is sequentially executed, and the communication management unit 102 receives a communication stop instruction from the communication business unit 101,
When a command indicating that is passed to the communication memory management unit 103, the command is received by the command receiving unit 22, is determined by the command determining unit 23, and the acquired memory releasing unit 29 is activated. In response to this, the acquired memory release means 29
If there is a base memory and an extended memory managed by the above, all the acquired memories including that are returned to the main memory 106 through the main memory control unit 104.

FIG. 3 illustrates how the main storage device is used by the memory management method according to the above embodiment. When a communication start command is passed from the communication service unit 101 to the communication management unit 102 and a base memory reservation request command is sent from the communication management unit 102 to the communication memory management unit 103, the base memory reservation unit 21 uses, for example, FIG. As shown in a), a certain area of the main storage device 40 is obtained as the base memory 41. Thereafter, when a data memory acquisition command is sent from the communication management unit 102 to the communication memory management unit 103, the data is acquired by the memory extraction unit 27, for example, as shown in FIG. Base memory 41
A certain area is taken out as the data memory 42-1.
Similarly, when a subsequent data memory acquisition instruction is received, the data memories 42-2 to 42-n are used as shown in FIG. 3C by using the empty area in the base memory 41 shown in FIG. 3B. Retrieved sequentially. Then, a data memory acquisition instruction is issued again, and if there is no such free space in the base memory 41 shown in FIG. 3 (c), the extended memory securing means 26 is started by the memory capacity determining means 24. As a result, as shown in FIG. 3D, the extension memory 43 is obtained, and the current data memory 42- (n + 1) is taken out using the free area of the base memory 41 and the extension memory 43. Also, for example, in the state shown in FIG. 3C, when a data memory return instruction for the data memory 42-n is given to the communication memory management unit 103, the memory adding means 25 causes As shown, the area used as the data memory 42-n is managed as a free area.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various other modifications can be made. For example, the following configuration can be adopted.

In the above embodiment, when the memory capacity determination unit 24 detects that the memory capacity is insufficient, the extended memory securing unit 26 is activated.However, the content of the acquired memory management table 28 is periodically referred to, and an empty area is determined in advance. A means for activating the extended memory securing means 26 when the capacity becomes equal to or less than the preset capacity is provided, and an empty area is secured in advance.

When the free space becomes equal to or more than a predetermined capacity by periodically referring to the content of the acquisition memory management table 28, for example, a means for returning a free space of a predetermined capacity in the extended memory to the main memory is provided, The increase in traffic prevents the capacity of the acquired memory from increasing, and thereafter prevents the traffic from decreasing and increasing the percentage of free space.

〔The invention's effect〕

As described above, according to the present invention, before starting data communication, a memory area having a capacity corresponding to the average traffic is acquired from the main storage device, and when the data is actually transmitted / received, the acquired memory area is acquired. From the required amount of memory to provide for communication processing, and, when data transmission and reception is completed, return the used memory to the acquired memory area as an empty area and use it for data transmission and reception afterwards, A memory area is newly acquired from the main storage device to extend the acquired memory area only when the acquired free memory area is insufficient, so that the efficiency of data transfer can be improved and the memory area can be increased. The waste of the area is reduced, and the main storage device can be effectively used.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a communication memory management unit 103, FIG. 2 is a block diagram showing a configuration example of a data communication system to which the present invention is applied, and FIG. 3 is a memory management system according to an embodiment of the present invention. FIG. 7 is an operation explanatory diagram of an embodiment illustrating how the main storage device is used by the embodiment. In the figure, 21 ... base memory securing means, 22 ... command receiving means, 23 ... command determining means, 24 ... memory capacity determining means, 25 ... memory adding means, 26 ... extended memory securing means, 27 ... ... memory removal means, 28 ... acquired memory management table, 29 ... acquired memory release means, 40 ... main storage device,
100 information processing device, 101 communication operation unit, 102 communication management unit, 103 communication memory management unit, 104 main storage control unit, 105 communication control unit, 106 main storage, 110: communication line, 120: communication processing device.

Claims (1)

(57) [Claims] 1. A management table for storing management information relating to a communication processing memory area acquired from a main storage device in a communication processing memory management method in an information processing device performing data communication with a communication processing device via a communication circuit. Acquiring means for acquiring a memory area having a capacity corresponding to the average traffic from the main storage device through a main storage control unit constituting a part of the operating system before starting data communication in the information processing device, and updating the management table At the time of actual data transmission / reception, determining means for referring to the management table to determine whether or not there is a free memory area having a capacity necessary for the data transmission / reception; and Then, referring to the management table, a free memory area having a capacity necessary for the current data transmission / reception is used for communication processing. A memory fetching means to be provided, and when a vacant memory area is insufficient, a new memory area for communication processing is obtained from the main storage device through the main storage control unit and the management table is updated. A memory adding unit for updating the management table based on a used memory area, a memory management method for communication processing in the information processing apparatus.