JPH0778745B2 - Distributed processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a distributed processing apparatus capable of efficiently controlling tasks processed in a plurality of computers.

(Prior Art) In recent years, with the diversification of requirements in each field of computer systems and the sophistication of technology, the system tends to become large-scale and complicated. The demand for systems is increasing.

In a general computer system, when a task occurs, disappears, or exchanges information between tasks, a request task generates an event including task control information, and the operating system sequentially interprets this and passes it to the target task.
Task control is executed.

Therefore, in order to execute these tasks, it is necessary to make the control information of tasks existing in a plurality of computers efficient.

(Problems to be Solved by the Invention) However, some event information exchanged between tasks in this way becomes unnecessary after the effective time due to event execution delay due to processing congestion or the like. In this case, the unnecessary event information remains in the system. Therefore, there is a need for processing that can handle event information that remains in the system even after the effective time. In the conventional event management method, the processing of an event that is no longer necessary, that is, executed after the effective time as described above, is performed by controlling and managing each task.

However, there is a problem that the processing at that time becomes complicated.

There is also a problem that the event processing efficiency is very poor.

The present invention has been made in response to such a situation, and it is possible to easily eliminate an event that has become unnecessary after the effective time without being conscious of the user, and improve the task control efficiency. An object is to provide a distributed processing device.

[Configuration of the Invention] (Means for Solving Problems) A distributed processing device according to the present invention connects a plurality of computers each having a task execution means for executing a task, and connects the computers through an event information exchange means provided in each computer. In the distributed processing device configured to exchange event information between the tasks, the task execution means, when event information for one task occurs from one task, the event information includes this event information as information. Adding an effective time that is a time limit having the value of
The present invention is characterized in that the valid time added to the event information received from the task is compared with the current time, and when the valid time exceeds the current time, the event information is erased.

(Operation) In the distributed processing device of the present invention, the format of the event information has an area indicating the effective time of the event information,
And since the event information exchange means has means for comparing the valid time of the event information with the current time, and for erasing the event information when the valid time exceeds the current time,
After the valid time has passed, it is no longer necessary to process event information that is no longer needed within a task, and the exchange of unnecessary event information between tasks is no longer performed. For this reason, it is possible to easily eliminate event information that has become unnecessary after the effective time, and it is possible to improve task control efficiency.

(Example) Hereinafter, the detail of the Example of this invention is described based on drawing.

FIG. 1 is a block diagram of an embodiment of the present invention.

The distributed processing device shown in the figure includes operation circuits (task executing means) 1a, 1b, ... For executing tasks, and task control devices (event information exchanging means) 2a, 2b for controlling exchange of event information between tasks. It is configured by connecting a plurality of computers (not shown) each including.

Here, the task execution means is specifically a CPU that executes a task under the control of the OS. Further, the event information exchange means is specifically a mailbox for transmitting and receiving event information between tasks. Furthermore, the event information is specifically a message that is a unit for exchanging information between tasks.

As shown in FIG. 2, the format of the event information is composed of an area 3a indicating the valid time of the event information and an area 3b of the event information body.

In this event management system, for example, when the task A in the arithmetic circuit 1a generates the event information for controlling the task B in the same arithmetic circuit 1a or the task C in the other arithmetic circuit 1b, the above-mentioned event information is valid. Area showing time
By specifying the effective time in 3a, only the event information that arrives before this effective time will be sent to the task controller 2a or 2b.
The event information that has been processed in step 1 and arrives after the specified effective time is erased by the task control device 2a or 2b before reaching task B or task C.

This is done by the task controllers 2a, 2b ... Operating as shown in FIG.

First, the event information of which the effective time is designated by the task A in the arithmetic circuit 1a is passed to the task control device 2a, and the task control device determines which task the event is registered in the arithmetic circuit 1a, 1b .... Decide whether to control.

When the event information is for controlling the task B, that is, when the event information is passed to the task registered in the arithmetic circuit 1a, the task control device 2a is designated by the area 3a indicating the effective time of the event information. The valid time is read (step 401), this valid time is compared with the current time (step 402), and if the valid time is before the current time, the event information is passed to task B (step 403). If the time exceeds the current time, this event is deleted from the system so that it disappears (step 404).

The deletion is performed by deleting the event information from the event registration table.

When the event information is to control the task C, that is, when the event information is passed to the task C registered in the other arithmetic circuit 1b, the task control device 2a first indicates the valid time of the event information. The valid time specified in the area 3a is read (step 401), this valid time is compared with the current time (step 402), and if the valid time is before the current time, this event information is sent to the task control device 2b. The event information is passed (step 403), and if the valid time exceeds the current time, this event information is deleted (step 404). Next, the task control device 2b receiving this event information reads the valid time specified in the area 3a indicating the valid time of the event information (step 401), compares this valid time with the current time (step 402), If the valid time is before the current time, task C is activated and the event information is passed (step 403), but if the valid time exceeds the current time, this event information is erased (step 404).

Event information that has become unnecessary beyond the valid time is erased in the task control devices 2a, 2b, ..., Therefore, there is no need to process such event information in the task that receives the event information. Eliminating such event information becomes very easy. Further, since such event information is eliminated by the task control devices 2a, 2b, ... Having received this event information, it is judged whether or not it has become unnecessary after the effective time, so it becomes unnecessary after the effective time. Event information will not be passed to the arithmetic circuits 1a, 1b ... And other task control devices 2a, 2b.
The task control efficiency can be improved.

If a task controls an unspecified number of tasks and controls its own operation according to the result, wait for the event generated from the unspecified number of tasks until the specified effective time, and By processing the previously arrived event information, and by causing the task control device to eliminate the event information that has arrived after this time, that is, the event information whose designated effective time exceeds the current time, The elimination of the event information in the above-described embodiment is very easy, and the task control efficiency is significantly improved.

[Effects of the Invention] As described above, according to the distributed processing device of the present invention, it is possible to easily eliminate event information that has become unnecessary after the effective time, and can improve task control efficiency. become.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is a diagram showing a format of event information of this embodiment, FIG. 3 is a diagram showing tasks in an arithmetic circuit of this embodiment, and FIG. Is a flow chart showing the operation of this embodiment. 1 ... task execution means 2 ... event exchange means

Claims (1)

[Claims] 1. A distributed processing device configured to connect a plurality of computers having task executing means for executing a task and exchange event information between the tasks via event information exchanging means provided in each computer. When the task execution means generates event information for one task from another task, the task execution means adds to this event information an effective time, which is a time limit for which this event information has value as information, and exchanges the event information. The means compares the valid time added to the event information received from the task with the current time, and performs a process of deleting the event information when the valid time exceeds the current time. Processing equipment.