JPH03260838A - Limiting system for cpu using time - Google Patents

Abstract

PURPOSE:To prevent the malfunction of jobs by providing a job abort flag/abort flag setting means, a forcible end range judging means, a job forcible end means, and a task forcible end means. CONSTITUTION:An abort flag setting means 3 turns on a job abort flag 1 when the designation is previously applied so as to forcibly end a job when a task used a CPU until the limit time. A forcible end range judging means 4 refers to the flag 1 when the task used the CPU up to the limit time and transfers the control to a job forcible end means 5 when an ON state of the flag 1 is decided. The means 5 ends forcibly a main task including the task that used the CPU until the limit time and then refers to a task control structure 2 to end the processing if no subtask is included in the job. Thus it is possible to prevent the job malfunction due to a fact that a task used the CPU until the limit time and was forcibly ended.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to processing in a computer system in which a job consisting of a plurality of tasks that can be executed in parallel is executed, and particularly in such a computer system. Task CPLJ (CentralProcessing
Unit) relates to a CPU usage time restriction method for managing usage time restrictions.

[Conventional technology]

Conventionally, in this type of CPU usage time limit system, when a task uses the CPU up to the time limit, the task is forcibly terminated.

Note that in the above-mentioned computer system, one job is composed of a plurality of tasks that can be executed in parallel, and the tasks within a job are related to each other.

[Problem to be solved by the invention]

In the conventional CPU usage time limit method described above, a task is forcibly terminated when it uses the CPU up to the limit time, and since the tasks within a job are related to each other, one task may If a task is used until the time limit is reached and then forced to terminate, the job including the task may malfunction.

In view of the above points, an object of the present invention is to
An object of the present invention is to provide a CPU usage time limiting method that can prevent malfunctions of jobs caused by forced termination of a job after using it until the time limit.

[Means for Solving the Problems] The CPU usage time limit method of the present invention is a computer system in which a job consisting of a plurality of tasks that can be executed in parallel is executed. A job abort flag that has information indicating whether to forcibly terminate the task or the job containing the task at that point, and a specification to forcibly terminate the job containing the task when the task uses the CPU up to the time limit. an abort flag setting means for setting information indicating the designation in the job abort flag when a task has used the CPU up to a time limit; Includes a forced termination range determining means for determining whether or not a job has been forcibly terminated, and a task that used the CPU up to the time limit when it was determined by this forced termination range determining means that a job was specified to be forcibly terminated. A job force termination means for forcibly terminating a job; and a task force termination means for forcibly terminating a task that has used the CPU up to a time limit when it is not determined by the forcible termination range determining means that a job is specified to be forcibly terminated. and termination means.

[Effect]

In the CPU usage time limiting method of the present invention, a task
A job abort flag is provided that has information indicating whether to forcibly terminate the task or the job that includes the task when the task has used the CPU up to the time limit. When a specification is made to forcibly terminate the included job, the abort flag setting means sets information indicating the specification in the job abort flag, and the forced termination range determining means determines whether the task is within the CP.
When U is used up to the time limit, the job abort flag is referenced to determine whether or not the job is specified to be forcibly terminated, and the abort range determining means determines whether the job is specified to be forcibly terminated. When it is determined that the job force termination means forcibly terminates the job including the task that has used the CPU up to the time limit, and the force termination range determination means does not determine that the job is specified to be forcibly terminated. A task forced termination means forcibly terminates a task that has used the CPU up to the time limit.

〔Example〕

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the CPU usage time limiting method of the present invention. The job abort flag l (set to on to indicate that the job is to be forcibly terminated) has information indicating whether to forcibly terminate the task or the job containing the task, and A task control structure 2 that stores information, and an abort flag that turns on job abort flag 1 when a task is specified to forcibly terminate the job that includes the task when it uses the CPU up to the time limit. a setting means 3, a forced termination range determining means 4, which refers to a job abort flag l and determines whether or not a job is specified to be forcibly terminated when a task uses the CPU up to the time limit; and a forced termination range determination means 4; A job forced termination means for forcibly terminating a job including a task that has used the CPU up to the time limit based on reference to the task control structure 2 when the determination means 4 determines that the job is specified to be forcibly terminated. 5, and a task forced termination means 6 for forcibly terminating a task that has used the CPU up to the time limit when the forced termination range determination means 4 does not determine that a job is specified to be forcibly terminated. has been done.

FIG. 2 is a flowchart showing the processing of the job forced termination means 5. This process is performed in main task forced termination step 51.
, a subtask existence determination step 52 , and a subtask forced termination step 53 .

Next, the operation of the CPU usage time limiting system of this embodiment configured as described above will be explained.

The abort flag setting means 3 indicates that the task is C.
When a job is specified to be forcibly terminated when the PU is used up to the time limit, the job abort flag l is turned on.

The forced termination range determining means 4 refers to the job abort flag 1 and determines whether the job abort flag 1 is on or not when the task uses the CPU up to the time limit.

When the forced termination range determination means 4 determines that the job aport flag 1 is on, the forced termination range determination means 5
Pass control to.

The job forced termination means 5 performs the following processing (see FIG. 2).

First, the main task of the job, including the task that has used the CPU up to the time limit, is forcibly terminated (step 51).

Next, the task control structure 2 is referenced to determine whether the next subtask exists within the job (step 5).
2〉.

If the next subtask exists in this judgment, that subtask is forcibly terminated (step 53), and step 5
Control is returned to the judgment in step 2.

If the next subtask does not exist as determined in step 52, the process is terminated (at this point, forced termination of all tasks included in the job is completed).

When the forced termination range determination means 4 determines that the job appointment flag l is not on, the task termination range determination means 6
Pass control to.

The task forced termination means 6 forcibly terminates the task that has used the CPLI up to the time limit.

〔Effect of the invention〕

As explained above, the present invention provides a job appointment flag,
By providing the abort flag setting means 9 the relaxation end range determining means 8 the job forced termination means and the task forced termination means, it is possible to prevent job malfunctions caused by one task using the CPU up to the time limit and being forcibly terminated. It has the effect of being able to prevent this.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a flowchart showing the processing of the job forced termination means in FIG. In the figure, l... Job aport flag, 2... Task control structure, 3... Abort flag setting means, 4... Forced termination range determination means, 5... Job forced termination means, 6. ...It is a means of forcibly terminating a task.

Claims (1)

[Claims] In an electronic computer system in which a job consisting of a plurality of tasks that can be executed in parallel is executed, the task is forcibly terminated when the task uses the CPU up to a time limit, or the task is included. A job abort flag that has information indicating whether to forcibly terminate a job, and when a task is specified to forcibly terminate a job including that task when the CPU has been used up to the time limit, that specification is added to the job abort flag. an abort flag setting means for setting information indicating that the job is to be forcibly terminated; and a forced termination range determination device that refers to the job abort flag and determines whether or not the job is specified to be forcibly terminated when the task uses the CPU up to the time limit. means, a job forced termination means for forcibly terminating a job including a task that has used the CPU up to the time limit when it is determined by the forced termination range determining means that the job is specified to be forcibly terminated; CPU usage time characterized by having task forced termination means for forcibly ending a task that has used the CPU up to a time limit when it is not determined by the end range determining means that a job is specified to be forcibly terminated. Restriction method.