JPH0319037A - Control system for task execution time - Google Patents

Abstract

PURPOSE:To control the task execution time by transferring the remaining task execution time between the processor groups when a procedure is called and sent out between processor groups. CONSTITUTION:The remaining task execution time is set at a task control block 12 corresponding to a control processor group 4 set at the reception side of the inter-processor communication. Thus the remaining task execution time can be transferred between both control processor groups 3 and 4. The remaining task execution time is stored when a procedure is carried out at the group 4 of the reception side and then decreased by a timer function. Thus the task execution time is controlled so that the total task execution time never exceeds the limit processor using time allowed to a relevant task.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a task execution time control system, and in particular, communication between 10 processors (a group consisting of one or more processors of the same type). A plurality of processor groups 1 of different types in a tightly coupled "multi-processor system" having a communication function to be carried out;
This invention relates to a task execution time control method when multiple tasks are executed.

[Conventional technology]

Conventionally, in this type of task execution time B31 control method, the task control block for each processor group (the task corresponding to each processor group Control n block), and the task execution time control function provided for each processor group (such as a function that uses a timer function to extinguish the set task execution time limit) allows the task to be executed within a closed range within its own processor group. Managed (controlled) task execution time.

In this management, when the task execution time limit set before the start of task execution is exhausted in one processor group, execution of the task is terminated.

As for literature related to conventional technology, for example, “NEC Corporation SX Software 5xCP Manual (CDA
II-3) pages 62-63.

[Problem to be solved by the invention]

In the conventional task execution time control method 1 described above, task execution time is managed within a closed range within the own processor group by the task execution time control function provided for each processor group. The processor usage limit given to the task is set as the task execution time limit for each processor group. There is a drawback that the execution of a task cannot be terminated unless the task execution time within the group exceeds the processor usage limit.

In view of the above-mentioned points, an object of the present invention is to provide a task execution time control method that can control task execution time so that the total execution time of a task does not exceed the pro sensor usage time limit given to the task. Our goal is to provide the following.

[Means to solve the problem]

The task execution time control method of the present invention includes a task control block for each processor group, which is configured of a plurality of processor groups of different types, and for controlling tasks executed on the plurality of processor groups for each processor group. In a task execution time control method that controls the execution time of one task executed on multiple processor groups in a tightly coupled multiprocessor system with an inter-processor communication function, inter-processor communication related to the execution of the task is performed. In this case, in order to exchange the remaining task execution time of the task between processor groups, the remaining task execution time is set in one task control block corresponding to the processor group on the receiving side of the inter-processor communication. The remaining task execution time set in the task control block corresponding to the inter-processor communication means in the processor group on the side and the processor group on the receiving side of the inter-processor communication by this inter-processor communication means on the receiving side that constitutes the task. and a timer register in the processor group on the receiving side, which is stored when a procedure is executed in the processor group on the receiving side and decrements the remaining time for executing the task by a timer function.

[Effect]

In the task execution time control method of the present invention, when inter-processor communication related to the execution of a task is performed by the inter-processor communication means in the processor group on the sending side of the inter-processor communication, the task execution of the task is performed between the processor groups. In order to exchange the remaining time, the remaining execution time of the task is set in the task control n block corresponding to the processor group on the receiving side of inter-processor communication, and the timer register in the processor group on the receiving side of inter-processor communication is The communication means stores the remaining task execution time set in the task control block corresponding to the processor group on the side (when the procedure is executed in the processor group on the receiving side that constitutes the task), and stores the remaining task execution time set in the task control block corresponding to the processor group on the side It will disappear due to the timer function.

〔Example〕

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

FIG. 1 is a block diagram showing the configuration of a tightly coupled multiprocessor system to which an embodiment of the task execution time control method of the present invention is applied. This tightly coupled multiprocessor system consists of a main storage device 1, a scientific processing device 2, an input/output processing device 5 that controls input/output to and from an auxiliary storage device 6, and an auxiliary storage device in which programs, data, etc. are stored. It is configured to include a storage device 6.

Is the main memory device l? 11 a task control n program for controlling the execution of tasks (or procedures constituting tasks) on processor group 3;

Control Processor
r) task control block 11 (task execution remaining time area 111 and AP (ArithmeticPro
task control pointer 112 for
) and the AP task control 3I block 12 (task execution (including the remaining time area 121 and the CP task control B block pointer 122), communication data during inter-processor communication (communication commands such as rCALLJ and rRETURNJ, and the task identification number of the task related to the inter-processor communication 3). - a communication data area 13 (including a communication command area 131 and a task identification number area 132) for temporarily storing information.

The scientific processing unit 2 includes a control processor group 3 that has an inter-processor communication function and performs the functions of a normal operating system, and an arithmetic processor group 4 that has an inter-processor communication function and performs high-speed scientific operations lγ.
and communication signals (processing (procedure) calling/
It is configured to include a signal wire 20 that enables the exchange of signals (signals indicating exit, parameters associated with calling/leaving, etc.).

The control processor group 3 controls the f4 arithmetic processor group 4, etc., and has the remaining task execution time indicated in trJ (as described later, this task execution remaining time is 0).
The timer register 30, which subtracts the timer register 30 based on the machine clock, and the arithmetic processor 4 via the signal line 20 (realizes the inter-processor communication function) ) interprocessor communication means 300.

The arithmetic processor group 4 has a timer register 40 that subtracts the stored remaining task execution time based on the machine clock, and an interprocessor that sends and receives communication signals between the control 1 processor group 3 and the control 1 processor group 3 via the signal line 20. It is configured to include a communication means 400.

FIG. 2 is a diagram showing the flow of control from the start of execution to the end of execution of an example of a task executed on the tightly coupled multiprocessor system shown in FIG. 1. Referring to this figure, this task includes a procedure executed on control processor group 3 and arithmetic processor group 4.
(These procedures are executed while mutually calling/leaving between the control processor group 3 and the arithmetic processor group 4.) In addition, the execution management of this task is performed by the task control program for CI) in the main storage device l corresponding to the control processor group 3 and the arithmetic processor group 4.
1 and the AP task control block 12 are used and control is performed in each of the processor group 3, fJrt process, and subgroup 4.

FIG. 3 is a flowchart showing task execution time limit setting processing performed by the control processor group 3 at the start of task execution. The task execution time limit setting process consists of a task execution time limit determination step 31 and a task control n block setting step 32 for task execution time limit CP.

The fourth time is a flowchart showing the timer register setting process performed in the control processor group 3 or the arithmetic processor group 4 at the start of procedure execution. The timer register setting process consists of a timer register setting step 41.

FIG. 5 is a flowchart showing procedure call/exit communication transmission processing performed by the control processor group 3 or the arithmetic processor group 4. As shown in FIG. The procedure call/exit communication transmission process is performed at the procedure execution state saving step 51.
, a timer register contents writing step 52, and a communication command and task identification number writing and communication signal sending step 53.

FIG. 6 is a flowchart showing the procedure call/exit communication fee (3 processes) performed in the control processor group 3 or the arithmetic processor group 4. The procedure call/exit communication receiving process consists of a reply communication sending step 6I.

Next, the operation of the task execution time system 411 of this embodiment configured as described above will be explained.

When a task as shown in Fig. 2 is executed on the tightly coupled multiprocessor system shown in Fig. 1, first, before starting task execution (at the time of starting task execution), task execution is restricted as a task execution start process. A time setting process is performed in the control processor group 3 (step 21, see FIG. 3).

First, the following values are determined as the task execution time limit (step 31). In other words, if the job step corresponding to the task is the first step, the value (
If there is no specified value, the specified value in the tightly coupled multiprocessor system, the specified value, and the specified value are stored in the auxiliary storage device 6, and the control processor group 3 receives those values via the input/output processing device 5. ) is determined as the task execution time limit, and if the job step corresponding to the task is from the second step onwards, the processor usage time limit specified in the job step of the current step or the time limit specified for the job. The value obtained by subtracting the time used in the job step before the step from the processor usage limit time (if there is no specified value, the specified value in the tightly coupled multiprocessor system).The specified value and the specified value are stored in the auxiliary storage device 6. and the control processor group 3 obtains these values via the input/output processing device 5) is determined as the task execution time limit.

Next, the task execution time limit determined in step 31 is set in the task execution remaining time area 111 in the CP task control block 11 in the main storage device 1 (step 32).

Subsequently, task execution processing is performed in the control processor group 3 and the calculation processor group 4 (step 2).
2).

In this task execution process, first the procedure in control processor group 3 (control processor procedure)
As a procedure execution start process, a timer register setting process is performed (step 2200, see FIG. 4).

That is, the remaining task execution time set in the task execution remaining time area 111 in the CP task control n block 11 corresponding to the control processor group 3 (the processor group in which the control processor procedure operates) is the same as that of the control processor group. Timer register 3 in 3
It is set to 0 (step 41).

When the timer register setting process in step 2200 is completed, execution of the control processor procedure is started in control processor group 3 (step 220
1).

When a procedure running on arithmetic processor group 4 (arithmetic processor procedure) is called from the control processor procedure whose execution has started, control processor group 3 (processor group on the third side) uses the inter-processor communication means 300 to A procedure call communication transmission process is performed (step 2202, see FIG. 5).

That is, first, the execution state of the control processor procedure that requests the call of the arithmetic processor procedure is saved to the CP task:h control block 11 in the main tα device 1 (step 51), and the execution state of the timer register 30 at that point is saved. The content (task execution remaining time at this point) is stored in the task execution remaining time area 121 in the AP task control block 12 (task control block corresponding to the receiving processor group) indicated by the AP task control block pointer 112. written (step 52)
).

Next, a communication command indicating a procedure call ([CALLJ, etc.)
The task identification number of the task is written, and interprocessor communication is performed to send a communication signal via the signal line 20 (step 53).

Arithmetic processor group 4 (communication data area 13 in main storage device 1) which received the communication signal in this inter-processor communication
communication commands and task identification numbers are also obtained)
Then, the inter-processor communication means 400 performs procedure call communication reception processing (step 2210.
(see figure).

That is, the arithmetic processor group 4, which is the receiving processor that has received the communication signal, sends a reply communication to the control processor group 3 via the signal line 20 (step 61).

The arithmetic processor procedure called by the control processor group 3 is given the right to execute on the arithmetic processor group 4, and the timer register setting process is performed in the arithmetic processor group 4 as a procedure execution start process (step 2220, FIG. 4). reference).

That is, the task execution remaining time area 1 in the AP task control block 12 corresponding to the arithmetic processor group 4
The remaining task execution time set as 21 is set in the timer register 40 in the arithmetic processor group 4 (step 41).

When the timer register setting process in step 2220 is completed, execution of the procedure for the current 8 arithmetic processors starts in arithmetic processor group 4 (step 2220).
21).

When the execution of the procedure for the arithmetic processor is completed,
In the calculation processor group 4 (processor group on the transmitting side), the inter-processor communication means 400 performs procedure exit communication transmission processing (step 2222.
(see figure).

That is, first, the execution state of the arithmetic processor procedure that exits to the control processor procedure is stored in the main memory! The CP task l11rn block is saved in the AP task control block 12 (step 51), and the content of the timer register 40 at that point (task execution remaining time at this point) is indicated by the CP task control block pointer 122. 11 (task control n block corresponding to the received processor group) is written to the task execution remaining time area 111 (step 52
).

Next, a communication command (rRETLIRNJ
etc.) and the task identification number of the task are written,
Interprocessor communication is performed to send communication signals via the signal line 20 (step 53).

In the control processor group 3 that has received the communication signal through this inter-processor communication, the inter-processor communication means 300 performs procedure exit communication reception processing (step 2
230. (See Figure 6).

That is, the control processor group 3, which is the processor group on the receiving side, sends a reply communication to the arithmetic processor group 4 via the signal line 20 (step 61).

The procedure for the M control processor to which control has been returned from the arithmetic processor group 4 is given the right to execute on the control processor group 3, and in the control processor group 3, timer register setting processing is performed as procedure execution start processing (step 2240). (See Part 4).

That is, the task execution remaining time set in the task execution remaining time area 111 in the CP task control 11 block corresponding to the control processor group 3 is set in the timer register 30 in the control processor group 3 (step 41).

When the timer register setting process in step 2240 is completed, the control tffll processor procedure is executed again in control processor group 3 (step 2240).
41).

When the execution of the control processor procedure is completed (step 2242), all execution of the task (step 22) is completed.
When the task execution processing (task execution processing) is completed, task execution termination processing is performed (step 23).

Steps 21.2200-2202.2230. above.
When the processes of steps 2240 to 2242 and 23 are being performed, the arithmetic processor group 4 is in the execution state of other tasks or the idle state, and the processing of steps 2210 and 2242 is being performed.
While the processes 220 to 2222 are being performed, the control processor group 3 is in the execution state of other tasks or in the idle state.

In such a series of processes, if the value of the timer register 30 or 40 (remaining task execution time) becomes O during execution of each program, execution of the task is aborted.

In the above description of the operation of the task execution time control system of this embodiment, exclusive control of the communication data area 13, which is naturally required in a tightly coupled multiprocessor system, is omitted.

Further, although the timer registers 30 and 40 in the task execution time control method of this embodiment are of a type that is subtracted by a machine clock, other types of timer registers (in any case, the timer function is used) It is also possible to use

Further, in the task execution time control method of this embodiment, the case has been described in which the processor groups that perform inter-processor communication are the control processor group 3 and the calculation processor group 4, but the present invention can also be applied to inter-processor communication by other processor groups. Needless to say, it is applicable.

〔Effect of the invention〕

As explained above, the present invention allows tasks to be executed on multiple processor groups by exchanging remaining task execution time between processor groups when a procedure is called/exited (during inter-processor communication) between processor groups. This has the effect that the task execution time can be controlled so that the total task execution time of a task does not exceed the processor usage time limit given to that task.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a tightly coupled multiprocessor system to which an embodiment of the present invention is applied, and FIG. 2 is a block diagram showing the configuration of a tightly coupled multiprocessor system shown in FIG. FIG. 3 is a flowchart showing the task execution time limit setting process in the control processor group in FIG. 1, and FIG. FIG. 5 is a flowchart showing the timer register setting process in the control processor group or the 3γ processor group; FIG. 2 is a flowchart showing procedure call/exit communication reception processing in the control processor group or calculation processor group in the figure. In the figure, 1...Main storage device, 2...Scientific processing unit, 3...Control n processor group, 4... Arithmetic processor group, 5...Input/output processing unit , 6... Auxiliary storage device, 11... CP task control block, 12...
・ 13. Remaining task execution time area; - AP task control block pointer; - CP task control block pointer; - Communication command area; - Task identification number area; - Inter-processor communication means.

Claims (1)

[Scope of Claims] A processor comprising a plurality of processor groups of different types and having a task control block for each processor group to control tasks executed on the plurality of processor groups, and an inter-processor communication function. In task execution time control method 1, which controls the execution time of one task executed on multiple processor groups in a tightly coupled multiprocessor system with A processor group on the sending side of inter-processor communication that sets the remaining task execution time in the task control block corresponding to the processor group on the receiving side of inter-processor communication in order to exchange the remaining task execution time of the task between groups. The remaining task execution time set in the task control block corresponding to the processor group on the receiving side of the inter-processor communication by the inter-processor communication means in the processor group on the receiving side constituting the task. 1. A task execution time control method comprising: a timer register in a processor group on the receiving side, which stores the remaining task execution time when a procedure is executed, and reduces the remaining task execution time using a timer function.