JPH02189660A - Data processing system using multiplex virtual storage system - Google Patents

Abstract

PURPOSE:To reduce the number of required memories in a system and to shorten the application program (AP) loading time at the time of starting the system by arranging plural APs to be executed by plural job inherent areas in common in a system shared area. CONSTITUTION:The application programs APa15 to APc17 to be used in respective job inherent areas to be AP execution spaces are arranged in the system shared area 6 and an AP loading list 21 for pointing out the entry addresses of these APs is also formed and arranged in the system shared area 6. Since the APs to be used by plural AP execution spaces in common are arranged in the system shared area 6 to use the APs in respective AP execution spaces in common, the job inherent areas of respective AP execution spaces is reduced. Since it is unnecessary to load the same AP in respective AP execution spaces, time required for the rise of the system and the initializing processing of each space are shortened.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a data processing system using a multiple virtual memory method, and particularly to a multiple space online system or database using a multiple virtual memory method electronic computer. The present invention relates to a data processing system that uses a multiple virtual memory method that enables a reduction in the required memory capacity of the system.

[Prior art] As a prior art related to a data processing system using a multiple virtual memory method, for example, ``Latest database system and its application'' (Kyoritsu Shuppan, bit special issue, 1984, 1)
The technology related to IMS/vS described in ``Japanese Edition'' is known.

In general, in a data processing system that uses a multiple virtual storage method such as a multiple space online system or a database system, when the same application program (hereinafter referred to as AP) is executed in multiple virtual spaces, the same AP is used in each virtual space. was installed to execute the AP.

This kind of conventional technology will be explained below with reference to the drawings.

FIG. 5 is a block diagram showing an example of the configuration of the prior art. In FIG. 5, 1 is a terminal device, 2 is a communication control device,
3 is a central processing unit, 4 is a nucleus area, 5 is a job-specific area, 6 is a system common area, 7 is an online control task, 8 is a message reception, 9 is an AP schedule, 10 is a message transmission, 11 is an AP control task , 12
is the data area, 13 is the work area, 14 is the AP control, 1
5 to 17 are APa”APc.

The conventional system shown in FIG. 5 includes a plurality of terminal devices 1 connected to a central processing unit 3 via a communication control device 2. The central processing unit 3 is configured with a multiple virtual memory space having a nucleus area 4, a plurality of job-specific areas 5, and a system common area 6, and one of the job-specific areas 5 is used for online control. Task 7, Receive message 8. It is a control space that has the functions of AP schedule 9 and message reception 10, and sends and receives messages to and from the terminal device 1 via the communication control device 2, and controls other job-specific areas 5. The private space 5 includes an AP control task 11, a data area 12, a work area 13, an AP control 14 . APa”APc
15 to 17.

In the prior art configured as described above, the same A in multiple areas of the job specific area 5 as an AP execution space
For example, in FIG. 5, if P can be executed, A
Pa” APc15 to 17 are executed in two job-specific areas 5, and two APs are executed in job-specific area 5.
a”APc have the same content, the conventional technology
~ APb is placed and the AP is executed.

For this reason, in the conventional technology, in order to improve the multiplicity of the same AP processing, the same AP must be placed in many AP execution spaces, which increases the virtual memory space, and the paging In order to prevent performance deterioration due to
A corresponding real memory is required, which increases the required mounting memory capacity. This increase in the required installed memory capacity causes a decrease in the resident ratio in the buffer memory, and also causes performance deterioration of the entire system.

Furthermore, in the conventional technology, it is necessary to load the same AP from the program library into many AP execution spaces, which increases the program loading time and processes for system startup and initial setting of the AP execution spaces. This increases the time and makes it difficult to operate.

[Problems to be Solved by the Invention] As described above, the above-mentioned conventional technology arranges the same AP in each AP execution space, so it is difficult to solve problems in high-traffic online systems or database systems that require high multiplicity. . This has the problem of an increase in virtual memory and performance deterioration due to this, as well as an increase in system start-up and space initialization processing time, which deteriorates operability.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art, maintain reliability, and significantly increase virtual memory in a data processing system using multiple virtual storage methods such as multiple space online or database systems. It is an object of the present invention to provide a data processing system using a multiple virtual storage method, which secures multiple processing performance without increasing system start-up and space initialization processing time.

[Means for Solving the Problem] According to the present invention, the above object is achieved by loading an AP commonly used in each AP execution space into a system common area when starting up a data processing system. This is also achieved by creating a load list of the members and entry points of the APs loaded into the system common area, and by making the APs loaded into the system common area write-protected using a protection key.

Note that the AP placed in the system common area mentioned above is re-entrant coded and must not be written into the program8. Also, when executing the AP, the created Search the load list of APs that have already been placed in the system common area, and find the AP that should be executed in the system common area.
If so, control is passed to the entry point indicated by the load list, and the AP is thereby executed.

[Effect] APs that can be shared by multiple AP execution spaces are placed in the system common area so that they can be used in common in each AP execution space, making it possible to reduce job-specific areas in each AP execution space. can. Also, since there is no need to load the same AP into each AP execution space, it is easier to start up the system.

The time required for space initialization processing can be shortened.

[Embodiment 1] An embodiment of a data processing system using a multiple virtual storage system according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram explaining the AP load list, and FIG. 3 is a block diagram showing the configuration of an embodiment of the present invention.
FIG. 4 is a flowchart illustrating the interconnection control operation. FIG. 4 is a flowchart illustrating the load list creation and loading operation of APs placed in the system common area. 1 and 2, 18 to 20 are APd to APf unique to the AP execution space, 21 is a system common area placement AP load list, 22 is a job specific area placement AP load list, and other symbols are This is the same as the case in FIG.

One embodiment of the present invention shown in FIG.
In the illustrated example, an AP that is commonly executed by a plurality of job-specific areas 5 that are AP execution spaces, AP a"AP c
This differs from the prior art described above in that it stores APs 15 to l7 and can link these APs to each job-specific area.
In other respects, they are configured similarly.

In FIG. 1, when a message is input from the terminal device 1, this message is sent to the central processing unit 3 via the communication control device 2. Online control task 7 of job-specific area 5 which is a control space in central processing bag W3
receives this message by message reception 8,
The transaction schedule for the AP control task 11 in the job-specific area 5, which is the AP execution space, is
This will be done according to Schedule 9.

The AP control task 11 passes control to the APa15 via the AP control 14 according to the transaction scheduled by the online control task 7, and the APa15 to A
AP processing by PC17 is executed. The response message created by this AP processing is transmitted by the online control task 7 to the terminal device 1 via the communication control device 2 using the message transmission 10 function.

The data area 12 and work area 13 used to execute the above-mentioned AP processing are placed in the job-specific area 5, and are designed to prevent their contents from being destroyed by APs in other job-specific areas 5. has been done.

Next, a load list used for transferring control between APs placed in each job-specific area and APs placed in the system common area will be explained with reference to FIG.

APa15 to APc17, which are commonly used by each job-specific area serving as an AP execution space, are located in the system common area 6, and the AP load list 21 for pointing to the entry addresses of these APs is also located in the system common area 6.
Created and placed within.

In addition, APd18 to APf2 specific to each job-specific area
0 is placed in each job-specific area, and an AP load list 22 for pointing to the entry addresses of these APs is also created and placed in the corresponding job-specific area.

These load lists 21 and 22 are as described below.
Referenced when executing the AP.

Next, using the load list explained in Figure 2,
The operation of transferring control of the AP will be explained with reference to the flowchart shown in FIG.

(1) When the AP control task 11 calls the AP,
First, it is checked whether the address constant is resolved by the called AP being bound by an internal built-in module or linkage editor. If the address constant for the called AP has been resolved, the internal built-in A
Branch to P. In this case, the internal embedded AP is
It may be located in the job specific area 5 or may be located in the system common area (step 31).

(2) In step 31, if the address constant for the called AP is unresolved, the AP control task 11 searches the system common area allocated AP load list 21 and determines whether the called AP is registered in this load list 21. Check to see if there is one. If the load list of the called AP exists in the load list 21 described above, APa15 to APa15 in the system common area 6 pointed to by the load list
Branch to APc17 (step 32).

(3) In step 32, if the load list of the called AP does not exist in the system common area allocation [AP load list 21], the AP control task 11 searches the job-specific area allocation AP load list 22 and lists this load list. 2
Check whether the called AP is registered in 1. If the load list of the called AP exists in the load list 22 described above, the process branches to APd18 to APf20 in the job specific area 5 pointed to by the load list (step 33).

(4) In step 33, if the load list of the called AP does not exist in the job-specific area allocated AP load list 22, the called AP stored in a library such as an external storage device is placed in the job-specific area 5. and branch to the called AP (step 34).
.

Next, the operation of creating and loading a load list of APs placed in the system common area will be explained using the flow shown in FIG.

First, the processing when starting up the online system will be explained.

(1) At the start of an online system or database system based on the multiple virtual memory method, the AP control task 1, which is an online control task, loads a parameter defining the member name of the AP to be placed in the system common area 6 into a preload member. Read from the library 23 (step 40).

(2) Based on the read parameter information, a load list area is secured in the system common area 6, and a load list 21 of APs to be placed in the system common area 6 is created (steps 41 and 42).

(3) Next, read the directory information of the APs shown in the load list created in step 42 from the program library 24, which has a directory index, calculate the size of each AP, and create a system common area corresponding to this size. A loading area for the AP is secured within 6 (steps 43 and 44).

(4) Read and load the AP from the program library 24 according to the load list into the area in the system common area 6 secured in step 44 (
Step 45).

(5) The AP loaded into the system common area 6 in step 45 is write-protected using the memory protection key (step 46).

The above processing completes the startup of the system, and thereafter, each AP can be executed as explained with reference to FIG. The APs to be placed in the system common area 6 are:
It can be determined in advance by the system operator, and the arrangement of APs in the system common area 6 may be performed using a control space.

Next, the processing when the system is terminated will be explained.

(6) Performed at the time of termination or startup of an online system or database system using a multiple virtual memory method. The write-inhibited state of the AP placed in the system common area 6 is released, and the loading area and load list area of the AP are released (steps 47 to 49).

According to the embodiment of the present invention described above, by arranging the AP that can be commonly used in each job-specific area in the system common area, it is possible to reduce the memory capacity of the virtual space. The capacity of real memory can be reduced, and the time required to start up the system can be shortened.

[Effects of the Invention] As described above, according to the two aspects of the present invention, the memory required for the system can be reduced in a data processing system such as an online system or database system that utilizes a multiple virtual memory method.

Moreover, the AP loading time at the time of starting the system can be shortened, and the operability of the system can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram explaining an AP load list. FIG. 3 is a flowchart explaining the inter-AP connection control operation, FIG. 4 is a diagram explaining the load list creation and loading operation of APs placed in the system common area, and FIG. 5 is a block diagram showing an example of the conventional technology. be. 1... Terminal device, 2... Communication control device, 3... Central processing unit, 4... Nucleus area, 5... Job Private area, 6...
... System common area, 7αj1 ... Communication - online control task, 8 ... Message reception, 9 ... AP schedule, 10
...Message transmission, 11...AP control task, 12...Data area, 13...
...Work area, 14...AP area, 15-2
0...AP, 21, 22...AP load list. 20: API Figure αd ↓ 2nd Figure 9 AP Schedule

Claims (1)

[Claims] 1. In a data processing system using a multiple virtual memory method, there is provided a multiple virtual memory method characterized in that an application program that is commonly executed in a plurality of job-specific areas is placed in a system common area. Data processing systems used. 2. Data processing using the multiple virtual storage method according to claim 1, wherein the application program placed in the system common area is executed in a write-protected state by a memory protection key. system.