JPH08212085A - Information processor and communication processor - Google Patents

Abstract

PURPOSE: To effectively reduce the task waiting time loss by detecting the processing requests that are selectively given to plural tasks to make them set each processing schedule and then control each execution procedure. CONSTITUTION: A task control means 23 of a control soft system 2 carries out plural tasks that should be performed by the same CPU 31 through the time slice processing or the real time processing in response to the operating state of the corresponding processor. This processing is temporarily stopped and another task is carried out by the time slice processing if the continuous processing time of the task that is carried out by the real time processing reaches a prescribed limit time. Then a schedule setting means 24 detects in time series the processing requests of tasks and sets the processing schedules in response to the contents of each request. These set processing schedules are written and registered into a schedule table 26. Then a schedule control means 25 controls the execution procedure of each task based on the contents of the table 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus effectively applied to a communication processing apparatus such as a facsimile machine.

[0002]

2. Description of the Related Art A communication device such as a facsimile device has a plurality of hardware systems such as a communication board and an image input / output device, and a predetermined communication operation is performed by the cooperation of the plurality of hardware systems. It becomes necessary to execute the item control processing in parallel.

Therefore, in the conventional apparatus of this type, in order to execute the processing of a plurality of items required for communication in parallel, a so-called time slice processing in which the same computer simultaneously processes a plurality of tasks in a time division manner. Was being done.

In this time slice process, as shown in FIG. 9, a plurality of task processes (1 to n) are sequentially executed while shifting the time. As a result, the processing of each task is executed each time the processing of another task completes.

[0005]

However, according to such a configuration, when there are many tasks, there is a problem that the processing waiting time loss of the tasks that actually need to be processed becomes large.

The above problem occurs for the following reasons. That is, in an information processing device such as a communication processing device, a plurality of tasks are prepared to perform the control operation required for the device, but all of the plurality of tasks are not always in the processing request state, The processing of each task is selectively executed according to the operating status of the device.

However, as shown in FIG. 9, in the above-described device, in addition to the processing of the task in the processing request state, the processing of the task not in the processing request state is indiscriminately executed. The processing of the task that is not in the processing request state is a dummy processing that is unnecessary for the operation of the device at that time, and only delays the processing of the task that is in the processing request state. Therefore, for example, in a communication processing device that performs various controls necessary for communication by selectively processing a large number of tasks, unnecessary dummy processing causes a large waiting time loss of necessary actual processing. Cause problems.

The present invention has been made in view of the above-mentioned problems, and in an apparatus for executing a plurality of task processes, it is possible to effectively reduce a processing waiting time loss of a task which actually needs to be processed. An object is to provide an information processing device and a communication processing device that improve processing efficiency.

[0009]

In order to solve the above-mentioned problems, the present invention detects a processing request selectively issued for a plurality of tasks executed by the same computer according to the operating status of the apparatus. Then, the processing schedule is set according to the request contents, and the execution procedure of each task is controlled based on the set contents.

[0010]

According to the present invention, with the above-described configuration, in a device that executes a plurality of task processes, it is possible to selectively execute only the process of the task necessary for the operation of the device.
It is possible to improve the processing efficiency by effectively reducing the processing waiting time loss of the task that actually needs the processing.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

In the drawings, the same reference numerals indicate the same or corresponding parts. FIG. 1 shows a schematic configuration of an information processing apparatus according to an embodiment of the present invention. The information processing apparatus shown in the figure is configured as a communication processing apparatus,
Reference numeral 1 is a controlled hardware system, 2 is a control software system for controlling the controlled hardware system, and 31 is a CPU (computer having a microcircuit).

The controlled hardware system 1 includes a plurality of communication boards (1 to n) 11 and a plurality of input / output control boards (1 to n).
k) is provided under the control of the CPU 31.

The control software system 2 includes various control tasks 21 and 22 for controlling the hardware system 1, task 21, and
Task control means 23 for individually controlling the processing execution of 22;
A schedule setting unit 24 that detects a processing request to each task in time series and sets a processing schedule according to the request content, and controls an execution procedure of each task based on the setting content of the schedule setting unit 24. It includes a schedule control means 25, a schedule table 26 in which the writing of schedule settings is registered. Each task 2
1, 22 and control means 23, 24, 25 are all C
It is designed to be executed by the PU 31.

Here, the task control means 23 uses the same CP.
A plurality of tasks to be processed by U31 are executed in time slice processing or real-time processing according to the operating status of the device, and the continuous processing time of the tasks executed in real-time processing has reached a predetermined time limit. In this case, the real-time processing is temporarily suspended to execute the processing of another task by the time slice.

The schedule setting means 24 detects the processing request of each task in time series and sets the processing schedule according to the content of the request. The schedule is set by writing and registering it in the schedule table 26. The schedule control means 25 controls the execution procedure of each task based on the contents of the schedule table 26.

FIG. 2 shows the contents of the schedule table 26 in which the setting and writing whether or not it is necessary to execute the process for each task is performed.

FIG. 3 shows an operation flow of the schedule setting means 24. When a processing request (event) occurs, the setting means 24 uses an event processing macro to determine whether there is a task that needs to be executed, and if there is a task that needs to be executed, that task is executed. Schedule table 2 to write the setting to the effect that execution of
Do for 6.

FIG. 4 shows an operation flow of the schedule control means 25. The control means 25 selectively and sequentially executes only the tasks set in the schedule table 26 that need to be executed. The schedule control means 25 causes the CPU to selectively execute only the processing of tasks that need to be executed, and omit processing for tasks that do not need to be executed.

FIG. 5 shows a schematic configuration of a hardware system for realizing the apparatus shown in FIG.
1 is a communication board (1 to n), L1 to Ln are communication lines, 1
2 is an input / output control board (1 to k), 31 is a CPU, 32
Is a ROM in which the control software system described above is stored together with an OS (operation system), 33 is a RAM used for temporary storage of work areas and data, and 34 is a time slice time TS and a real-time time limit T.
It is a timer for measuring R and the like.

The operation of the apparatus configured as described above will be described below. FIG. 6 is a timing chart showing an operation example of the main part of the device of the present invention. The operation shown in the figure is an operation executed by the schedule setting means 24 and the schedule control means 25 described above,
Only the processing of tasks scheduled based on the operating status of the device is selectively executed, and the processing of other tasks not scheduled is omitted. As a result, the execution cycle TE of task processing is significantly shortened,
Even if the number or types of tasks is large, the processing waiting time loss of the tasks that actually need to be processed is effectively shortened and the processing efficiency is improved.

FIG. 7 is a timing chart showing the first operation example of the above-mentioned task control means 23, where TS is 1 when the time slice processing is executed.
The maximum processing time per task, TR is the maximum processing time per task when the real-time processing is executed, that is, the real-time limit time, and TW is the real-time processing restart when the real-time processing is interrupted due to reaching the above limit time TR. The waiting time, MS represents a section in which the time slice processing is performed, MR represents a section in which the real-time processing is performed, and EV represents a real-time processing request (event). Real-time maximum processing time TR
Is set to a time sufficiently longer than the maximum time slice processing time TS for performing real-time processing.

In a situation where the real-time processing request (event) EV does not occur, the above-mentioned schedule setting means 2
The time slice processing is executed according to the schedule set by 4. At this time, the maximum processing time of each task is limited to TS.

Here, when a processing request EV for a real-time task is generated, the above-mentioned time slice processing is interrupted, and the processing of the real-time task corresponding to the processing request EV is continuously executed in a state in which it has a CPU exclusively. Will be done. However, when the continuous execution time reaches a predetermined time limit TR, the real-time processing is interrupted and the time slice processing is temporarily performed. When the time slice processing has passed the predetermined processing restart waiting time TW, the interrupted real-time processing is restarted. After the real-time processing corresponding to the processing request EV is completed, the process immediately shifts to the time slice processing. The time slice processing after the transition is continued until the next real-time processing request EV is generated.

As described above, a plurality of task processes are executed by the time slice process or the real time process according to the operating condition of the apparatus, and the continuous process time of the tasks executed in the real time process is a predetermined time limit TR. When the time reaches, the real-time processing is temporarily suspended and the processing of another task is executed by the time slice, so that both the time slice and the real-time processing can be efficiently executed by the same CPU. This increases the CPU utilization efficiency without complicating the configuration and without increasing the cost,
The processing function can be further expanded.

FIG. 8 is a timing chart showing a second operation example of the task control means 23 described above. In the operation shown in the figure, the real-time processing mode is divided into first and second modes, and in the real-time processing of the first mode, when the continuous processing time reaches a predetermined time limit TR, the real-time processing is temporarily suspended. Then, the processing of the other task is executed by the time slice, and the real-time processing in the second mode is performed by continuing the execution until the processing is completed. The first mode and the second mode are set according to the contents of the processing requests (events) EV1 and EV2, respectively. MR2 is the real-time processing time of the second mode, and this processing time MR2 is not restricted by the time limit TR. As a result, it is possible to execute a real-time task under the same CPU that performs a process whose contents cannot be interrupted midway.

[0027]

As is apparent from the above description, the present invention detects a processing request selectively issued for a plurality of tasks executed by the same computer according to the operating status of the apparatus. , By setting the processing schedule according to the request content and controlling the execution procedure of each task based on the setting content, it is possible to selectively execute only the processing of the task necessary for the operation of the device. Therefore, there is an effect that the processing waiting time loss of the task that actually needs to be processed can be effectively shortened and the processing efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram focusing on a software configuration of an information processing device according to an embodiment of the present invention.

FIG. 2 is a diagram showing the contents of a schedule table

FIG. 3 is a diagram showing an operation flow of a schedule setting means.

FIG. 4 is a diagram showing an operation flow of a schedule control means.

FIG. 5 is a schematic configuration diagram focusing on a hardware configuration of an information processing device according to an embodiment of the present invention.

FIG. 6 is a diagram showing an operation example of a schedule control unit in the form of a timing chart.

FIG. 7 is a timing chart showing a first operation example of the task control means.

FIG. 8 is a timing chart showing a second operation example of the task control means.

FIG. 9 is a timing chart showing the state of task control by a conventional device.

[Explanation of symbols]

 1 Controlled Hardware System 2 Control Software System 11 Communication Board (1 to n) 12 Input / Output Control Board (1 to k) 21, 22 Control Task 23 Task Control Means 24 Schedule Setting Means 25 Schedule Control Means 26 Schedule Table 31 CPU (Computer made into a micro circuit) 32 ROM 33 RAM L1 to Ln communication line TE task processing execution cycle TS time slice time TR real time limit time

Claims (5)

[Claims] 1. A schedule setting for detecting a plurality of tasks executed by the same computer and a processing request selectively issued to the plurality of tasks, and setting a processing schedule according to the content of the request. An information processing apparatus comprising: means and a schedule control means for controlling an execution procedure of each task based on the setting contents of the schedule setting means. 2. The schedule control means determines whether or not to execute the processing for each task according to the setting contents of the schedule setting means.
The information processing device according to 1. 3. When the processing of a plurality of tasks is executed by time slice processing or real-time processing according to the operating status of the device, and the continuous processing time of the tasks executed in real-time processing reaches a predetermined time limit. 3. The information processing apparatus according to claim 1, further comprising task control means for temporarily suspending the real-time processing to execute processing of another task by time slice. 4. The processing of a plurality of tasks is executed by time slice processing or real-time processing according to the operating status of the apparatus, and the real-time processing mode is set to
In the second mode, in the real-time processing of the first mode, when the continuous processing time reaches a predetermined time limit, the real-time processing is temporarily suspended to execute the processing of other tasks by the time slice. 4. The real-time processing in the mode 1 includes a task control means for continuing execution until the processing is completed.
The information processing device according to any one of 1. 5. A plurality of tasks for causing the same computer to execute control processing of a plurality of items required for communication operation, and a processing request selectively issued to the plurality of tasks are detected and the requested contents are responded to. A communication processing apparatus comprising: a schedule setting means for setting a processing schedule; and a schedule control means for controlling an execution procedure of each task based on the setting contents of the schedule setting means.