JP2570612B2 - Job suspension control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a job interruption control method for an information processing system having a job interruption function for interrupting / resuming a job constituted by a system program and a user program in a user program section at the request of a user. .

[0002]

2. Description of the Related Art In a conventional job interruption method in an information processing system, when a user requests a suspension of a running job, a program exception set in a processing program section of the running job is generated. When the program exception occurs, the job operation status is saved to a checkpoint file and the job is interrupted.

[0003]

However, in the above-described conventional job interruption method, when the target job is in an event waiting state (standby state) at the time when the execution job is requested to be interrupted, the job interruption is triggered. Cannot generate a program exception. Therefore, in such a case, it is impossible to interrupt the program until an event occurs (until the standby state is released), and therefore, there is a disadvantage that the utilization efficiency of the system is reduced.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problem. A job interruption control method capable of interrupting a job without waiting for an event to occur even if the target job is in an event waiting state. Is to provide.

[0005]

In order to achieve the above object, the present invention relates to a job interruption control method for an information processing system having a job interruption function for interrupting a job at the request of a user. A standby state storage flag for storing information indicating whether or not the job is interrupted, a target job specifying unit for receiving a request to interrupt the job, and specifying the requested job as a job to be interrupted, A job status determining unit that determines whether the interrupted job is in a standby state by referring to a standby status storage flag, and processing of the job when the job status determining unit determines that the interrupted job is not in the standby state A program for generating a program exception which triggers the interruption processing of the job for the program. And exception setting means, said interrupted job in the job status determination means waiting state der
If it is determined that that or if the program exception occurs with the program exceptions setting means, and checkpoint acquisition means for retracting the operating status of the interrupted job, the interrupted the retreat of the operation status is made And a suspension execution unit for performing a job suspension process.

According to another aspect of the present invention, the job is monitored as needed, it is determined whether the job is in a standby state, and if the job is in a standby state, information indicating the standby state is stored in the standby state storage flag. And a state updating unit that performs the operation. Preferably, the status updating unit sets the flag corresponding to the job to ON when the job is in the event waiting state, and sets the flag corresponding to the job to the ON state when the job is not in the event waiting state. It is configured to be OFF.

[0007]

The program status updating means monitors the running job and determines whether the job is in the standby state. If the job is in the standby state, the program status updating means turns on the value of the standby state storage flag. Turn off the value of the standby state storage flag. When a job suspension request is issued, the job status determination unit determines whether the value of the standby status storage for the job to be interrupted specified by the target job specifying unit is ON or OFF. Pass control to exception setting means. Along with this, the program exception setting means
A program exception is generated as a trigger for causing the job to be interrupted to be interrupted, and control is transferred to the checkpoint acquisition unit with the program exception as a trigger. The value of the user standby status storage flag for the job to be interrupted is O
If N, control is passed directly to the checkpoint acquisition means without causing a program exception. Then, the checkpoint acquisition unit saves the operation status of the job to be interrupted. The interruption execution means performs interruption processing of the interruption target job whose operation status has been saved.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration according to an embodiment of the present invention. In the present embodiment, a target job identification processing unit 11, a program state update processing unit 12, and a standby state storage flag 1 indicating whether a job is in an event waiting state.
3, a job state determination processing unit 14, a program exception setting processing unit 15, a checkpoint acquisition processing unit 16,
And an interruption execution processing unit 17.

The target job identification processing section 11 determines whether or not there is a job requested by the user when the user issues an instruction to interrupt the execution job. Identify the job as the job to be interrupted. The program status update processing unit 12 determines the current status of the running job, and sets the value of the standby status storage flag 13 corresponding to the job to ON or OF.
F.

The standby state storage flag 13 stores ON / OFF information indicating whether or not the job is in an event standby state. That is, when the flag is ON, it indicates that the corresponding job is in the event waiting state, and when OFF, it indicates that the corresponding job is not in the event waiting state. Here, the standby state storage flag 13 stores ON / OFF information for all the jobs being executed.

The job state determination processing unit 14 refers to the value of the standby state storage flag 13 and, when the job to be interrupted is in the event waiting state, directly checks the checkpoint acquisition processing unit 16.
Otherwise, the control is passed to the program exception setting processing unit 15. Program exception setting processing unit 1
No. 5 generates a program exception which triggers the interruption of the job in the job processing program.

The checkpoint acquisition processing section 16 saves program data indicating the operation state of the job to be interrupted at the time of a job interruption request to the checkpoint file 18. The interruption execution processing unit 17 performs interruption processing of the interruption target job whose operation state has been saved.

The operation of the job interruption control system configured as described above will be described below. First, the operation of the program state update processing unit 12 will be described with reference to the flowchart of FIG.

The program status update processing unit 12 is started periodically, monitors a running target job, and updates the user standby status storage flag 13 according to the job status.
When monitoring the program status, the program status update processing unit 12
Determines whether the target job is waiting for an event (step 201). If waiting for an event, step 202
Otherwise, control is passed to step 203.

If the target job is waiting for an event, the program status update processing unit 12 turns on the value of the user standby status storage flag 13 (step 202). If the target job is not waiting for an event, the value of the user waiting state storage flag 13 is turned off (step 203).

Next, the processing when a job interruption request is made will be described. At the time of a job interruption request, the target job identification processing unit 11 identifies a job to be interrupted. The job state determination processing unit 14 performs the processing shown in FIG. 3 on the interrupt target job specified by the target job specification processing unit 11.

First, the job status determination processing unit 14 determines whether the value of the user standby status storage flag 13 for the interrupted job is ON or OFF (step 301). When the value of the user standby state storage flag 13 for the job to be interrupted is OFF, control is passed to the program exception setting processing unit 15 (step 302). Along with this, the program exception setting processing unit 15 generates a program exception which triggers the interruption of the job for the processing program of the job to be interrupted, and controls the checkpoint acquisition processing unit 16 with this program exception. give.

When the value of the user standby state storage flag 13 for the interrupted job is ON in step 301, no program exception occurs, and control is passed directly to the checkpoint acquisition processing unit 16 (step 303). The checkpoint acquisition processing unit 16 saves the operation status of the job to be interrupted in the checkpoint file 18. After that, the interruption execution processing unit 17 completes the interruption processing of the interruption target job for which the saving of the operation status has been completed. Although the present invention has been described with reference to the preferred embodiments, the present invention is not necessarily limited to the above embodiments.

[0019]

As described above, according to the present invention, when an execution job interruption request is made by a user, even if the interrupted job is in the standby state, the job is not waited for the occurrence of a program exception. Can be interrupted. Thereby, the utilization efficiency of the system is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a job interruption control method in an information processing system according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating an operation of a program state update processing unit illustrated in FIG. 1;

FIG. 3 is a flowchart illustrating an operation of a job state determination processing unit when a job interruption request is issued.

[Explanation of symbols]

 11 Target job identification processing unit 12 Program status update processing unit 13 Standby status storage flag 14 Job status judgment processing unit 15 Program exception setting processing unit 16 Checkpoint acquisition processing unit 17 Interruption execution processing unit 18 Save file

Claims (3)

(57) [Claims] In a job interruption control method of an information processing system having a job interruption function for interrupting a job at the request of a user, a standby state storage for storing information indicating whether the job is in a standby state in job units. A flag, a target job specifying unit that receives a request for suspending the job, and identifies the requested job as a job to be suspended. Means for determining whether the job to be interrupted is
When it is determined that the job is not in the standby state, a program exception setting unit that generates a program exception that triggers the interruption processing of the job with respect to the processing program of the job;
A checkpoint acquisition unit that saves the operation status of the job to be interrupted when it is determined that the job is in a standby state or when a program exception occurs by the program exception setting unit; and the operation status is saved. A job interruption control method, comprising: interruption execution means for executing interruption processing of the interruption target job. 2. A status updating means for monitoring the job as needed, determining whether the job is in a standby state, and storing information indicating the standby state in the standby state storage flag when the job is in the standby state. The job interruption control method according to claim 1, wherein: Wherein the state update unit, when the job event wait state, the standby-shaped corresponding to the job
If the status storage flag is set to ON and the job is not in the event waiting status, the standby status storage corresponding to the job is stored.
3. The job interruption control method according to claim 2, wherein the flag is turned off.