JPH08249226A - Management system for memory resources - Google Patents

Abstract

PURPOSE: To provide a management system for memory resources capable of reducing the loads on an operating system and effectively utilizing the memory resources. CONSTITUTION: In a computer system 11 in which an application program requests allocation to the operating system 16 and uses the memory resources 17, a memory resource management part 12 present between the operating system 16 and the application program for managing the memory resources 17 used by the application program is provided. The memory resource management part 12 relates the memory resources to be allocated to a request origin process ID, receives possible requests in a summarized form, and at the time of the end of a request origin process, releases the memory resources belonging to the process altogether.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a memory resource management system, and is particularly suitable for a computer system that uses a large number of memory resources in small units when the total number of memory resources that can be used by the entire computer system is limited. Memory resource management system.

[0002]

2. Description of the Related Art When storing some information in a memory, as shown in FIG.
It is a conventional general method to logically connect memory pieces having one unit of information with an address pointer. In this case, since memory resources must be allocated one by one, even if the above-mentioned small memory group is held in the initial state, it is possible to repeat the memory allocation request from the application program to the operating system in units of one piece. I was going. In addition, a request for releasing unnecessary memory resources must be issued for each acquisition unit, and the batch release function in processing units has not been considered.

[0003]

In the case of having the above-mentioned small memory group in the initial state, conventionally, either one of the following two methods is performed. (1) The application program issues a memory allocation request to the operating system in units of one piece. (2) The application program issues a memory allocation request to the operating system, which is (size per piece) x (number) as one continuous area. However, in the case of the above method (1), there is a problem that a huge overhead occurs in the operating system, and, for example, in the Windows V3.1 operating system, only 8192 pieces of memory are used in the entire operating system. There is also a restriction that you cannot have it. Also, in the case of the method (2), the efficient size of the system is not taken into consideration, and memory resources may be wasted by securing a huge continuous area unnecessarily. Furthermore, in the past, the release request was also made in units when the memory was acquired, and there was no mechanism for batch release of multiple memory pieces. The present invention has been made in view of the above circumstances, and an object of the present invention is to solve the above-mentioned problems in the conventional technology, reduce the load on the operating system, and effectively use the memory resources. To provide a resource management system.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a computer system in which an application program makes an allocation request to an operating system to use memory resources, and the application program is located between the operating system and the application program. A memory resource management unit that manages the memory resource to be used is provided, and the memory resource management unit associates the allocated memory resource with the request source process ID and accepts possible requests in an aggregated form. At the end of, the memory resource management system is characterized by collectively releasing the memory resources belonging to the process.

[0005]

In the memory resource management method according to the present invention, a memory resource management unit is provided between the operating system and the application program, and the memory resource management unit allocates the memory resource and the request source process I.
A request that can be associated with D is accepted, and at the end of the request source process, the memory resources that belong to that process are released, so that multiple memory pieces of the same size are allocated to the operating system once. Not only does it reduce the load on the operating system that can be replaced by quota requests, but it also avoids the total limit. Further, in the memory resource management method according to the present invention, the memory exchanged between the memory resource management module and the operating system is the optimum memory size (for example, W
In the indows 3.1 operating system, a large memory piece is counted as one in 64 kilobyte units, so it is most efficient to make a memory resource allocation request to the operating system in 64 kilobyte units.) And the surplus for the request from the application program is used for the next request, so that the memory resources can be effectively used.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram of a processing system that employs a memory resource management method according to an embodiment of the present invention. In the figure, 11 is a processing system having a CPU and a memory, and has a memory resource management unit 12 inside. The memory resource management unit 12 uses the memory resources 1 owned by the system.
7 and the process 15 that wants to use it,
The memory resource management unit 13 manages memory resources, and the memory resource management unit 12 itself for storing the memory resources in use, and the memory resource management unit 12 own the ownership, and
The process 15 has an available memory resource storage unit 14 that stores distributable memory resources.

FIG. 3 shows the logical structure of the resource-in-use storage unit 13. Information on all memory resources used via the memory resource management unit 12 is managed by the address chain from the head information pointer 31. A primary information list 32, which corresponds to the memory resource management ID one-to-one, is linked to the above-mentioned head information pointer 31 in the list format of FIG. Primary information list 32
Is the next information pointer 321, memory resource management ID 32
3 and a pointer 322 of the secondary list 33 for managing address information of the memory. The secondary list 33 internally has information on the start address and size of each in-use memory resource block.

FIG. 4 shows the internal structure of the available memory resource storage unit 14 in FIG. In the available memory resource storage unit 14, a memory resource block that can be distributed in response to a request from a process is logically combined with a list structure connected in the order of address and a list structure connected in the order of size. Managed by shape. The flow of processing will be described below based on the configuration diagrams shown in FIGS. 1 to 4 and the operation flow diagrams shown in FIGS. Process 15
Prior to using the memory resource 17, the memory resource management unit 12 performs memory resource management I on a process-by-process basis, a process division unit within the process, or a data group unit.
Get D.

The above-mentioned memory resource management ID is assigned by the memory resource management unit 12 to the request source process ID in the upper order and the integer unique to the process ID in the lower order. With this memory resource management ID, it is possible to collectively return memory resources belonging to the same ID at the end of unit processing. This is because, for example, when expanding the contents of a file in the memory, by acquiring the memory resource management ID for each file, the memory used for the processing of the file is collected at the end of the processing of the certain file. It is possible to return it.

Next, the process 15 issues a memory resource use request to the memory resource management unit 12 (step 51). The contents of the request are the memory resource management ID, the size of one piece of memory (unit size), and the number of pieces of memory. Upon receipt of the request, the memory resource management unit 12 refers to the resource registered in the available memory resource storage unit 14 and determines whether all the requests from the process 15 can be satisfied (step 52). In the initial state, there is no resource registered in the available memory resource storage unit 14, and the request from the process cannot be satisfied. Therefore, the process proceeds to step 56, and a memory allocation request is issued to the system in units of the optimum size for system operation (for example, paging size, segment size, etc.) (step 56).

The memory resource management unit 12 registers the acquired memory resource in the available memory resource storage unit 14 (step 57). Then, the process returns to step 52 again, and it is determined whether all the requests from the process 15 can be satisfied. Since there are resources that can satisfy the request this time, the process proceeds to step 53 and is distributed from the available memory resource storage unit 14 to the process 15. Distribution is repeated for the requested number.
(Steps 52-54). At this time, the distribution status is registered in the in-use memory resource management unit 13. In the in-use memory resource management unit 13, the memory resource to be distributed to the process 15 is a memory block in which a plurality of request unit lengths are continuous. Manage as.

Here, the partially remaining memory resources are registered in the available memory resource storage unit 14 so as not to destroy the logical structure in the address order / size order, to prepare for the subsequent request. After that, the memory resource management unit 12 transfers the memory resources to be passed to the process 15 to the requesting process in a list format as shown in FIG. 2 (step 55). According to the above-described operation, the optimum size for system operation is acquired and the process is allocated from here, so the load on the operating system can be reduced and memory resources can be effectively used. It will be possible.

When the memory pieces acquired in the process 15 are no longer needed, all or part of the requested number is stored in the format shown in FIG. 2 together with the size of one piece and the memory resource management unit. Return to 12. In this case, the memory resource management ID can be designated to collectively return the memory resources belonging to the ID (step 66). Further, the memory resource management unit 12 manages the memory resources distributed to the process 15 in association with the request source process ID, and periodically monitors the process ID being used, so that when the request source process ends, The memory resource belonging to the process is automatically returned.

The memory resource management unit 12 assembles the memory resources returned from the process in the order of addresses (step 6
4) Return those that can be returned to the system in units of memory resource exchange with the system (steps 65 and 67), and register the rest in the available resource storage unit. That is, a complete memory transfer unit with the system is not held in the available memory resource storage unit. According to this operation, the load on the operating system can be reduced and the memory resources can be effectively used, as in the case of acquiring the resources. It is needless to say that the above embodiment shows one example of the present invention, and the present invention should not be limited to this.

[0015]

As described above in detail, according to the present invention, it is possible to realize a memory resource management system that reduces the load on the operating system and enables effective use of memory resources. It is a thing.
More specifically, since an allocation request for a plurality of memory pieces of the same size is replaced with one system call,
The load on the operating system can be reduced and the total number limit can be avoided. In addition, since the memory return processing can be performed in processing units or data group units, the processing when returning memory resources can be simplified, and omission of return can be prevented.

[Brief description of drawings]

FIG. 1 is a block diagram of a processing system that employs a memory resource management method according to an embodiment of the present invention.

FIG. 2 illustrates a method of logically concatenating physically discontinuous areas using address pointers to retain information in memory.

FIG. 3 is a diagram showing a logical structure of an in-use memory resource storage unit 13 in the embodiment shown in FIG.

4 is a diagram showing a logical structure of an available memory resource storage unit 14 in the embodiment shown in FIG.

FIG. 5 is a diagram showing a processing flow when a memory allocation request is made;

FIG. 6 is a diagram showing a flow of processing when a memory return request is made.

[Explanation of symbols]

11 processing system 12 memory resource management unit 13 in-use resource storage unit 14 available memory resource storage unit 15 process group that is a source of allocation and return request of memory resource 16 operating system 17 memory resource

Claims (1)

[Claims] 1. A computer system in which an application program makes an allocation request to an operating system to use memory resources, and a memory resource management unit is located between the operating system and the application program and manages memory resources used by the application program. The memory resource management unit associates the memory resource to be allocated with the request source process ID and accepts possible requests in an aggregated form. When the request source process ends, the memory resource management unit A memory resource management system characterized by batch release.