JPH09185516A - Multitask priority control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To balance respective services and to balance an inquiry system task with an automatic update system task by previously designating every processing time within fixed time. SOLUTION: An inquiry task 13 is divided into three groups A-C for each service and a means for measuring processing time tA-tC within fixed time TO defines the processing time within TO previously designated for each inquiry group as TA-TC, the processing time within TO previously designated for the entire inquiry task 12 as TI, and the processing time within TO previously designated for an automatic update task 15 as TJ. When the relations of TA>tA, TB>tB and TC>tC are established, control is performed for lowering the priority of inquiry task groups to the intermediate level of task and when the relation of tA+tB+tC>TI is established, control is performed for lowering the priority of entire inquiry task 13 to the same priority as the automatic update system task or lowering it to priority lower than the automatic update system task.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multitasking priority control method for controlling a processing balance between services by designating information in a method of performing a plurality of services in one process.

[0002]

2. Description of the Related Art As task priority control, for example, as disclosed in Japanese Unexamined Patent Publication No. 62-65137, the task priority is changed only when a specific state such as exclusion occurs and the processing is efficiently performed. A method of processing is disclosed. However, this method is controlled only in a specific state, and the entire process is not controlled. Moreover, since it is caused by a specific state, it is necessary to change the existing part when adding a function.

[0003]

When a plurality of services are provided in one process, it is common to provide a task group for each service to perform processing. However, a task group as described above is provided and a plurality of services are provided at the same time. If the user tries to do so, there is a problem that the processing time of the process is assigned only to a certain specific service due to the relationship between the task switching timing and the number of tasks.

When an automatic update system task and an inquiry system task are provided in one process, the priority of the automatic updating system task is set lower than that of the inquiry system task, and the response at the time of inquiry is generally designed to be faster. However, when the traffic of the inquiry response is high, there is a problem that the automatic update system task sinks.

[0005]

[Means for Solving the Problems] In order to solve the above problems, a means for calculating each task execution time from the time of task switching timing and a query-related task are grouped for each service, and within a fixed time for each group. A means for measuring the processing time using the task execution time is provided, and when the processing time of each group exceeds the processing time designated in advance for each group within a certain time, the priority is lowered from other groups ( (Higher than automatic update-related tasks), control that preferentially processes other groups, and if the processing time of all query-related tasks exceeds the processing time of all specified query-related tasks within a fixed time, The priority of all query-related tasks is lowered to the same level as that of the automatic update task, and the control to suppress the priority of query-related tasks and the processing time of all query-related tasks are preset If the processing time of all specified query-related tasks is exceeded and the processing time of automatic update-related tasks exceeds the processing time of all specified automatic update-related tasks within a certain time, the query-related tasks The overall priority is set lower than that of the automatic update system task, and the control for preferentially processing the automatic update system task is provided.

Further, a control system is provided in which the task execution time is used to make the priority of the automatic update system task higher than that of the query system task at regular intervals.

As shown in the above-mentioned control method, it is possible to balance each service and balance the inquiry task and the automatic update task by designating each processing time within a fixed time. is there.

Further, by increasing the priority of the automatic update system task at a constant interval, the variation of the automatic update service can be eliminated and the time from the automatic update generation to the service can be shortened.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below by taking the process task configuration of FIG. 1 as an example.

FIG. 1 shows the configuration of a server that provides a plurality of services to clients via a transmission / reception process 14.

The main process 11 includes an inquiry task 13 for executing inquiry response processing from each transmission / reception process 14,
It is composed of an automatic update task 15 for monitoring the automatic update, and an automatic update task 12 for providing an automatic update service to a client in response to a notification from the automatic update task 15.

The multitask priority control system of the present invention is
The inquiry task 13 is grouped into three groups A, B, and C for each service, and processing time within a fixed time (T0), tA (processing time of a task group that performs A service) tB (task that performs B service) Processing time of group) By means of measuring tC (processing time of a task group that performs C service), TA, TB, TC, and the entire query task 13 are set to the processing time within T0 designated in advance for each query task group. When the processing time in T0 designated in advance is TI and the processing time in T0 predetermined in the automatic update task 15 is TJ, and the following relations are satisfied,
Control to lower the priority of the relevant query task group to P3 (intermediate priority between the query task and the automatic update task) and TA> tA, TB> tB, TC> tC Control to lower the overall priority to P2 (the same priority as the automatic update system task) and tA + tB + tC> TI When the following relations are satisfied, the overall priority of the query task 13 is set to P1 (automatic update system task). It was controlled to lower the priority).

TA + tB + tC> TI Further, a control method is provided in which the priority of the automatic update task 15 is raised to P4 (the same priority as the query system task) at a constant interval (R0).

[0014]

As shown in the above embodiment, T0, TA,
It is possible to control each service according to the definitions of TB, TC, R0, P1, P2, P3, and P4, and it is also possible to perform control such that a specific service is preferentially performed according to the service form. Also, when adding a service, by adding a task group and changing the definition value, balance control with the existing service can be easily performed without changing the existing service.

[Brief description of the drawings]

FIG. 1 is a multitasking configuration of a server process that provides multiple services to clients.

[Explanation of symbols]

11 ... Server main process, 12 ... Automatically updated task group, 13 ... Inquiry task group, 14 ...
Transmission / reception process group, 15 ... Automatic update task.

Claims (1)

[Claims] 1. A task that performs an inquiry response process (hereinafter referred to as an inquiry task) in one process and a task that always performs an automatic update process except when a query occurs (hereinafter, this task is automatically executed). In the task control method in which multiple services are switched for each task switch, query-related tasks are grouped for each service and fixed for each grouping and each query-related task. A means for adding the processing time within the time, a means for changing the priority of each group and the whole query-related task according to the added time, and a means for increasing the priority of the automatic update-related task which is low in the normal time at a constant interval. A multitask priority control method characterized by performing balance control for each service and balance control between query tasks and automatic update tasks.