JPH0797322B2 - Dispatch control method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a dispatch control method for scheduling the execution order of programs, and more particularly to a dispatch control method for changing the execution priority of a started specific program and dispatching it. It is about.

[Conventional technology]

Conventionally, in a data processing system of a large computer, an operation unit called a so-called task or activity is
It is dispatched according to the execution priority of the specified space (virtual address space) or the priority within the space, and the control of the CPU (processor) is passed to the operation unit with the highest priority at that time. . A dispatcher that controls the execution order of such operation units, for example,
Starts when the processing unit that is currently operating is completed, when waiting for I / O, waiting for completion of processing requested to another operation unit, or when a predetermined interrupt occurs, and execution priority Search from a space with a high order, if there is an executable operation unit in that space, transfer control to the CPU for that operation unit, and if there is no executable operation unit in that space, search another space, At that time, the control of the CPU is passed to the executable operation unit having the highest execution priority.

Therefore, the operation unit in the user space is not executed before the operation unit in the system control space. For example, a user task that requires a high-speed response process for an input / output interrupt has no priority. Even if it is increased, the control of the CPU is lost to the operation unit of the system control space, and high-speed response processing cannot be performed. On the other hand, in order to change the execution priority of the operation unit defined by the system, a certain special priority space is set as described in JP-A-60-27950, and the operation of this special priority space is set. There is a proposal of a priority dispatch control method that dispatches units with the highest priority.

[Problems to be solved by the invention]

By the way, since the dispatcher that schedules the execution order of the operation unit performs dispatching only according to the execution priority order of the space and the task as described above according to the rule set in advance by the system, generally, the operation unit in the user space Is never executed before an operation unit in the system control space. Further, in the user space, the programs having the same priority are actually executed in the first come first served order. For example, if an unspecified number of users share the same job, the programs started by all users will have the same priority, so the programs will be executed in the order in which they were started. Will be. For this reason,
When certain conditions such as a certain user and a certain time zone are met, the priority of the program execution is changed to change the job execution order such that the execution of certain jobs is accelerated or delayed. There was a problem that change control was not possible.

The present invention has been made to solve the above problems.

An object of the present invention is to provide a dispatch control method in which the execution priority of a program is changed and controlled by the program identification name that identifies a specific program such as the user identification name of the user who starts the program, the program name, etc. Especially.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[Means for solving problems]

In order to achieve the above object, in the present invention, a data processing system is started up in a data processing system including a dispatcher that schedules an operation unit according to an execution priority stored in a control table corresponding to a processing unit of a program. A priority change register in which a priority corresponding to a program identifier is set at a point of time, a determination unit that compares the program identifier of the activated program with the program identifier set in the priority change register, and And a priority change processing means for changing the execution priority stored in the control table to the priority set corresponding to the program identifier set in the priority change register according to the output from the determination unit. Features that change the execution priority of a specific program that is started and dispatch it To.

[Action]

According to the means, in the data processing system including the dispatcher that schedules the operation unit according to the execution priority stored in the control table corresponding to the processing unit of the program, the program identification name is set at the time when the data processing system is started up. A priority change register in which a corresponding priority is set, a determination unit that compares the program identification name of the started program with the program identification name set in the priority change register, and an output from the determination unit. There is provided priority change processing means for changing the execution priority stored in the control table to the priority set corresponding to the program identification name set in the priority change register.

For the started specific program, the judgment unit compares the program identifier of the program with the program identifier set in the priority change register, and the program identifier of the started program is registered in the priority change register. When it is determined that the program identification name is set, the priority order change processing means is activated. The priority order change processing means changes the execution priority order stored in the control table corresponding to the processing unit of the program to the priority order set corresponding to the program identification name set in the priority order change register. This will cause the dispatcher to:
Dispatch according to the priority in which the execution priority is changed.

As the program identification name here, information that can identify the corresponding program such as a user identification name, a program name, and a registration number unique to the user is used. By this program identification name, according to the priority order registered in the priority order change register in advance, when the program is started, the execution priority is changed, and by dispatching, the same other A program having a priority can be processed with a higher or lower execution priority, and flexibility can be given to the execution of the program processing in the operation of the data processing system.

〔Example〕

An embodiment of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a main part of a dispatch processing unit of a data processing system according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a priority order change register, and the priority order to be changed is set corresponding to the program identification name. 2 is a priority area for storing the priority to be changed, 3
Is a program identification name area for storing a program identification name which is a key of the program whose priority is changed. Reference numeral 4 is a program activation processing unit, 5 is a determination unit, 6 is a program registration area during activation processing for registering a program identification name of a program for which activation processing is being performed, and 7 is a program identification name of a program for which activation processing is next performed. It is a registered program register. Reference numeral 8 is a priority change processing unit, and 9 is a dispatcher. 10 is the dispatch control block, 11
Is a priority control storage area of the space control table, 12 is a system control table that only exists in the system, 13 is a space control table that exists for each space, 14 is task control that exists for each task in the space It's a table.

When a new program is started in the data processing system, the space control table corresponding to that program
A new 13 is generated by the system control unit (not shown). The space control table 13 is provided with a priority storage area 11 for storing the execution priority that is always set when the program is started, and the priority storage area 11 stores the priority set in advance for the program. To be done. In this way, the space control table 13 created when the program is started up is connected to the queue from the system control table 12. Further, the task control table 14 for the task that executes the processing of the program is connected to the queue from the space control table 13. With respect to the data of the control table of the dispatch control block 10 set in this way, the dispatcher 9 looks at the queue of the space control table 13 from the system control table 12 according to the dispatching rules of the system, and checks each space control table. 13
The dispatching process that schedules the execution of the program is executed according to the execution priority 11 set in.

FIG. 2 is a flow chart for explaining the processing operation of the dispatch processing unit of FIG. The dispatch processing of this embodiment will be described with reference to FIG. Here, it is assumed that the user ID is used as a program identification name as a key for identifying the program of which the execution priority of the processing of the program is changed.

First, immediately after starting up this data processing system, a user who desires to change the execution priority of a program registers the user ID as the program identification name in the program identification name area 3 of the priority change register 1 At the same time, the execution priority order desired to be changed is set in the priority order area 2 in correspondence with the user ID registered in the program identification name area 3.

Assuming that the user has just started a certain program, the program start processing unit 4 causes
Program start processing 41 is executed. In the program activation process 41, first, in step 42, the user ID of the program from the activated program is set in the program registration area 6 during activation process. Then go to step 43,
User ID set in the program registration area 6 during startup processing
Is registered in the priority order change register 1. This processing is performed by the determination unit 5. If the user ID set in the program registration area 6 being started up is not registered in the program identification name area 3 of the priority order change register 1, the execution priority order of the started program is not changed. After completion, the process proceeds to the dispatch process 91. Thereafter, the system dispatcher 9 controls the dispatch process for the started program in accordance with the system dispatching rules. on the other hand,
In step 43, the program registration area 6 in the activation process
If the user ID set to is registered in the program identification name area 3 of the priority order change register 1, the process proceeds to step 44 to start the priority order change process (the determination unit 5 starts the priority order change processing unit 8). When the priority order changing process is started in step 44, the priority order changing processing section 8 starts the priority order changing process 81, and the processes from step 82 are performed. In step 82, the dispatch control block 10 managed by the dispatcher 9 sequentially follows the queue of the space control table 13 corresponding to the space generated by the start of the program, and searches the space control table of the started program. Next, at step 83, the contents of the execution priority 11 of the space in the space control table 13 corresponding to the started program are changed to the contents of the changed priority storage area 2 registered in the priority change register 1. Change to. This allows
The priority changing process ends, and then the dispatch process 91
Then, the system dispatcher 9 controls the dispatch process for the started program in accordance with the system dispatching rules. The dispatcher 9 executes dispatching control according to the space priority 11 set in the space control table 13 of the dispatch control block 10.

As described above, according to this embodiment, the dispatch control can be performed by changing the execution priority order of the programs to be started according to the program identification name and the priority order set by the user. Therefore, according to the conventional dispatching rule without making any change to the dispatcher 9, only the program having the program identification name registered in the priority order change registration area 1 is
It becomes possible to change the registered execution priority and execute the execution.

The present invention has been specifically described above based on the embodiments,
It is needless to say that the present invention is not limited to the above-mentioned embodiments and can be variously modified without departing from the scope of the invention.

〔The invention's effect〕

As described above, according to the present invention, it is possible to dispatch a program activation satisfying a pre-registered condition according to the registered execution priority order. Therefore, for a specific user who needs a very large service, the processing priority is changed without changing the program at all, even though the program is exactly the same as the program used by another user. It becomes possible to execute it. Also, changing the priority of processing is
It is possible to do it at the time of starting the data processing system. Thereby, in the operation of the data processing system, the execution of the program processing can be made flexible.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a main part of a dispatch processing unit of a data processing system according to an embodiment of the present invention, and FIG. 2 is a flow chart for explaining a processing operation of the dispatch processing unit of FIG. is there. 1 ... Priority change register, 2 ... Priority area, 3 ...
... program identification name area, 4 ... program start processing section, 5 ... determination section, 6 ... start processing program registration area, 7 ... program register, 8 ... priority change processing section, 9 ... dispatcher , 10 ... dispatch control block, 11 ... priority storage area, 12 ... system control table, 13 ... space control table, 14 ... task control table.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshio Takayama 5030 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Inside the software factory of Hitachi, Ltd. (56) References JP-A-60-10343 (JP, A) Kaisho 60-73747 (JP, A)

Claims (1)

[Claims] 1. A data processing system including a dispatcher for scheduling an operation unit according to an execution priority stored in a control table corresponding to a processing unit of a program, and corresponding to a program identification name when the data processing system is started up. A priority change register in which the priority is set, a determination unit that compares the program identification name of the started program with the program identification name set in the priority change register, and the output from the determination unit A priority change processing unit for changing the execution priority stored in the control table to the priority set corresponding to the program identification name set in the priority change register, A dispatch control method characterized by changing the execution priority and dispatching.