JPH0449427A - Periodic start control method - Google Patents

Abstract

PURPOSE:To prevent other processing from being disabled from being executed as less as possible by providing the periodical start control system with a comparing means for comparing the measuring value of a measuring means with a reference value and a period changing means for extending the starting period of a periodical start processing part from a previously determined period at the time of deciding that the measuring value is longer than the reference value. CONSTITUTION:The periodical start processing part 100 is started by a previously determined period and executes the prescribed processing. The measuring means 200 measures time required for completing the processing of the processing part 100 and the comparing means 300 compares the measuring value of the means 200 with the previously determined reference value TO. When the means 300 decides that the measuring value is longer than the reference value TO, a period changing means 400 extends the starting period of the processing part 100 from a previously determined period. Consequently, the starting period of processing requiring a long time is extended and troubles such that the processor is occupied by specific processing and other processing may be disabled from being executed can be removed.

Description

[Detailed Description of the Invention] [Summary] Regarding a periodic startup control method in an information processing system that periodically executes a predetermined process, it is possible to prevent a processing unit from being occupied by a specific process and making it impossible to execute other processes. The purpose is to prevent this as much as possible, and includes a measuring means for measuring the time required for the periodic activation processing unit to complete the process, a comparing means for comparing the measured value of the measuring means with a predetermined reference value, and a comparing means. A period changing means for extending the activation period of the periodic activation processing section beyond a predetermined period when the means determines that the measured value is longer than the reference value, and the period changing means is configured to include a comparing means. When the measured value is determined to be longer than the reference value, the activation period of the periodic activation processing section is configured to be extended to an integral multiple of a predetermined period.

[Industrial application field]

The present invention relates to a periodic activation control method in an information processing system that periodically executes predetermined processing.

For example, in an information processing system such as an electronic switching system that executes a plurality of real-time processes such as communication processing and failure processing, various real-time processes are activated and executed at predetermined intervals.

[Prior Art] FIG. 4 is a diagram showing an example of a conventional periodic activation control method in this type of information processing system, and FIG. 5 is a diagram showing an example of the processing process in FIG. 4.

4 and 5, the information processing system executes required processing by a processing device (not shown) executing a predetermined program (not shown) stored in a storage device (not shown). shall be taken as a thing.

Each of the programs is assigned a program number j (j=0 to 31 in FIG. 4). From now on, program each program using program number j (
j=0 to 31).

In the act table 1, act information A is registered corresponding to each program (j), and act information A 31 corresponding to the program to be executed by the processing device (for example, j=31) is a logical pattern. Act information A corresponding to a program (for example, j-0) that is set to 1° and is not to be executed by the processing device. is set to logic "0".

Further, in the entry registration table 2, an entry ej, that is, a starting address on the storage device where each program is stored is registered corresponding to each program (j).

Furthermore, in the periodic registration table 3, activation information Sij indicating the activation cycle of each program (j) corresponds to the count value i of the activation timer counter 41 provided in the periodic activation control unit 4 and the program number j. is registered.

The activation timer counter 41 counts the clock signal CK with a constant period (for example, 8 millisecond period), and repeatedly increments the count value i within the range of 0 to 11.

For example, 16 programs (j-31) are installed in the processing device.
When executing with a millisecond cycle, the area (i, j) on the periodic registration table 3 = (0, 31), (2, 31), (4, 3
1), ... Startup information S registered in (10, 31)
os+ −, 5211,5az0,..., Sl. 31
is set to logic "l", and the area (i, j) - (1, 31)
, (3,31),... 3131.3331,..., S, 13 registered in (11,31) is set to logic "O".

The periodic activation control unit 4 uses the act table 1 and the clock signal CK.
For example, by referring to the cycle registration table 3 according to the count value i of the startup timer counter 41 that counts
In the case of count value i-0 of 1, act information A, -"1" is registered in act table 1, and activation information 5o7-"1" is registered in area (0, j) of periodic registration table 3. When detecting a program (for example, j=31) in which is registered, entry e3 of the program (j=31)
1 and notifies the processing device of the entry e3+ to start execution of the corresponding program.

The processing device executes the required processing by sequentially extracting and executing the corresponding program (j=31) from the entry e31 of the storage device.

When another 16 milliseconds have elapsed and the count value i of the activation timer counter 41 reaches 2, the periodic activation control unit 4 detects activation information 5Z31-“1” from the periodic registration table 3 and writes the entry e31 again. The processing device is notified and executed.

Here, the time required for the processing device to execute the program (j-31) (hereinafter referred to as running time T) is the fifth
As exemplified in the figure, if the activation period is sufficiently close to the startup period (16 milliseconds in the example), the total processing time of the processing device will be reduced to the program (j =
31), and it becomes impossible to execute other processes.

[Problem to be solved by the invention]

As is clear from the above explanation, in the conventional periodic activation control method, the periodic activation control unit 4 unconditionally specifies the program to be executed by the processing device based on the registered contents in the act table 1 and the periodic registration table 3. Therefore, there is a problem in that a specific process with a long running time T occupies the processing device, making it impossible to execute other processes.

An object of the present invention is to prevent as much as possible a processing device from being occupied by a specific process and becoming unable to execute other processes.

[Means to solve the problem]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, 100 is a periodic activation processing unit included in the information processing system.

200 is a measuring means provided in the information processing system according to the present invention.

300 is a comparison means provided in the information processing system according to the present invention.

Reference numeral 400 denotes a period changing means provided in the information processing system according to the present invention.

[Effect]

The periodic activation processing unit 100 is activated at a predetermined period and executes a predetermined process.

The measuring means 200 measures the time required for the periodic activation processing section 100 to complete the processing.

The comparing means 300 compares the measured value of the measuring means 200 and a predetermined reference value T0.

The cycle change unit 400 changes the cycle activation processing unit 10 when the comparison unit 300 determines that the measured value is longer than the reference value T0.
To extend the activation cycle of 0 from a predetermined cycle.

Note that, as a method for extending the activation period by the period changing means 400, when the comparison means 300 determines that the measured value is longer than the reference value T0, the activation period of the periodic activation processing section 100 is changed to
It is considered to extend the period to an integral multiple of a predetermined period.

Therefore, the startup cycle of processes that require a long time is extended, and there is no possibility that the processing device will be occupied by a specific process and other processes will become impossible to execute.

〔Example〕

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

FIG. 2 is a diagram showing a periodic activation control method according to an embodiment of the present invention, and FIG. 3 is a diagram showing an example of the processing process in FIG. 2. Note that the same reference numerals indicate the same objects throughout the plan. Furthermore, the processing device, the program executed by the processing device, and the storage device that stores the program are not shown in FIG. 2 either.

In FIG. 2, the periodic activation processing unit 10 in FIG.
0 as Act table 1, Entry registration table 2, Normal cycle registration table 3. and periodic activation control section 4. A running time counter 7 is provided as the measuring means 200 in FIG. 1, a reference value register 6 and an excess determination section 8 are provided as the comparing means 300 in FIG. Period changing means 4 in Fig. 1
00, an extension period registration table 3b, a period extension control section 42 in the period start control section 48, and a period extension setting table 5 are provided.

In addition, in Figure 2, act table 1 and entry registration table 2 are shown.
, the part including the normal cycle registration table 31, the extended cycle registration table 35, the cycle start control unit 4□, and the cycle extension setting table 5 is referred to as the cycle variable control unit 10, and also includes the reference value register 6, running time counter 7, and excess judgment. A portion including the section 8 will be referred to as a driving state monitoring section 20.

In FIGS. 2 and 3, in order to cause the processing device to execute the program (j=31) in 16 milliseconds,
Act information A3 corresponding to the program (j=31). −
'“1°° is registered in act table 1, and the program (j
Entry e31 of =31) is registered in IJ registration table 2, and startup information S is added to the top of normal cycle registration table 3. 311
1s 5231a, S J311・, S1゜sea =
"1", 3131m, "'ff31m,..."
8. Register 311="0".

Furthermore, a program (j=3
If the running time T of 1) is longer than the predetermined reference value T0, in order to double the startup cycle of the program (j-31), the extension cycle registration table 3. Above, startup information S
osIb-, S a3+b and 5R31 not shown
b=“1°” and other startup information S i3+b=°“
0” is registered.

Note that the activation information 5llllb, 3431b, and 5af for which the logic "°1°" is registered on the extended cycle registration table 3b
f, is the normal periodic registration table 3. Activation information S03. in which logic "1" is registered above. a.S! 31as S43
+ms: Matches every other selection from Sl031m.

In addition, in the initial state, the extension information Lj corresponding to each program (j) on the cycle extension setting table 5 is logic "
It is set to 0°.

Periodic activation control section 4. As before, act table 1 and
According to the cycle extension setting table 5 and the count value j of the start timer counter 41 that counts the clock signal CK, the normal cycle registration table 31 and the extension cycle registration table 3 are referred to, and the act table I is
For a program (for example, j-31) in which act information A, -“1゛° is registered, and extension information is registered in the period extension setting table 5, and -“°0゛ is registered, When the count value i of the startup timer counter 41 is 0, the startup information SO3Im(-
The logical sum of “1°゛) and the activation information S.31b (-“1”) extracted from the extended cycle registration table 3. becomes logical “1”, that is, the activation information 8031m becomes logical “1°”. If it is detected that the program (j
= 31), notifies the processing device of the entries f and l+ to start execution of the corresponding program, and writes the program (j = 3) in the reference value register 6.
A reference value T0 defined in accordance with 1) is set.

The processing device executes the required processing by sequentially extracting and executing the corresponding program (j=31) from the entry e31 of the storage device.

Also, the periodic activation control section 4. monitors the execution status of a program (j=31) executed by the processing device,
When the processing device starts executing the program (j=31), it causes the running time counter 7 to start measuring the running time T,
When the execution is completed, measurement is stopped to measure the running time T of the processing device that executes the program (j=31).

The excess determination section 8 compares the measured value of the running time counter 7 with a reference value T0 set in the reference value register No. 6, and notifies the periodic activation control section 41 of the comparison result.

For example, if the running time T of the processing device that executes the program (j-31) is T1 in FIG.
The measured value t of the running time counter 7 never exceeds the standard (iTo).

In such a case, the cycle extension control unit 42 in the cycle activation control unit 43 executes the program (j=31) in the cycle extension setting table 5.
Let the extension information L31 corresponding to the logical "o" side.

Therefore, the periodic activation control unit 48 waits for another 16 milliseconds to elapse.
At the stage when the count value i of the startup timer counter 41 reaches i=2, the normal cycle registration table 3. The activation information S t3+a (="1") extracted from the extended cycle registration table 3. Startup information 8231b extracted from (-“0°゛)
The logical sum with SB+a becomes logical "1", that is, the startup information SB+a
When it is detected that the entry eat is the logic "'I", the entry eat is notified to the processing device again and the processing device is executed.

On the other hand, if the running time T of the processing device that executes the program (j=31) is T2 in FIG.
The measured value t of the running time counter 7 exceeds the reference value T0.

In such a case, the periodic activation control section 4. The cycle extension control unit 42 in the cycle extension setting table 5 program (j=31)
The setting of extension information L31 corresponding to is changed to logic ""1".

Thereafter, after another 16 milliseconds have elapsed and the count value i=2, the periodic activation control unit 48 updates the act table 1, the normal period registration table 31, the extended period registration table 3. and cycle extension setting table 5
, act information AJ="1'° is registered in act table 1, extension information is registered in period extension setting table 5, and =
“A program in which 1゛° is registered (for example, j=31
), the normal periodic registration table 3. The activation information SzsIm (-“1”) extracted from the extended cycle registration table 3. The logical AND with the startup information Szs+b (-”O”) extracted from the startup information 3231b does not become logical “1”, that is, the startup information 3231b
If it detects that is not logic "1", it does not notify the processing device of the entry e31, and after another 16 milliseconds have elapsed, that is, from the time when the previous processing device was notified of the entry eil+ of the program (j-31). 32 milliseconds have passed,
When the count value i=4 is reached, act table 1, normal cycle registration table 38, extended cycle registration table 3. and cycle extension setting table 5, and in the same process as above, normal cycle registration table 3.
．． The activation information S a3I* (="1") extracted from the extended cycle registration table 3. Startup information extracted from S a,+
The logical product with b (= “1゛°) becomes logical “1°”,
That is, when it is detected that the startup information 5431 is logical "1°°," the program number j-3 is entered from the entry registration table 2.
Extract the entry e31 registered corresponding to 1,
The entry e31 is notified to the processing device to start execution of the corresponding program, and the reference value T defined corresponding to the program (j=31) is stored in the reference value register 6.
0, and further initializes the running time counter 7 to start measuring time.

As is clear from the above description, according to this embodiment, the periodic activation control unit 48 sends the program (j
=31), the running time counter 7 measures the running time T of the processing device, and the excess determination unit 8
The measured value t is compared with the reference value T0, and if the measured value t exceeds the reference value T0, the sheet metal program (
=31) Even if the running time T2 of the processing device that executes the process is longer than the reference value T0, the occupancy rate for 32 milliseconds is halved, so the processing device is occupied by executing the specific process and executes other processes. The fear of something impossible disappears.

Note that FIGS. 2 and 3 are only one embodiment of the present invention, and for example, the startup cycle of the program (j=31) is not normally limited to 16 milliseconds, and there are many other variations. However, the effects of the present invention remain the same in either case. Also, the extension information of the program (j=31) is 1=
The activation cycle when set to logic “1” is not limited to extending twice the normal activation cycle;
Although extension to an arbitrary integer multiple is considered, the effect of the present invention remains the same in either case. Further, the program executed by the processing device (not shown) is not limited to program number j-31, and many other modifications may be considered, but the effects of the present invention remain the same in any case. Furthermore, the periodic activation processing section 100 and the measuring means 200 which are the object of the present invention
, the comparing means 300 and the period changing means 400 are not limited to those illustrated.

〔Effect of the invention〕

As described above, according to the present invention, in the information processing system, the startup cycle of processes that require a long time is extended, and there is no possibility that the processing device will be occupied by a specific process and other processes will not be able to be executed. It disappears.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the principle of the present invention, Fig. 2 is a diagram showing a periodic activation control method according to an embodiment of the present invention, Fig. 3 is a diagram showing an example of the processing process in Fig. 2, and Fig. 4 is a diagram showing an example of the processing process in Fig. 2. 5 is a diagram showing an example of a conventional periodic activation control method, and FIG. 5 is a diagram showing an example of the processing process in FIG. 4. In the figure, 1 is an act table, 2 is an entry registration table, 3 is a periodic registration table, 38 is a regular periodic registration table, 3 is an extended periodic registration table, 4 and 4. is a cycle start control unit, 5 is a cycle extension setting table, 6 is a reference value register, 7 is a running time counter, 8
3 is an excess determination unit, IO is a cycle variable control unit, 20 is a running state monitoring unit, 41 is a start timer counter, 42 is a cycle extension control unit, 100 is a cycle start processing unit, 200 is a measuring means, 3
00 indicates a comparison means, and 400 indicates a cycle change means.

Claims (2)

[Claims] (1) In an information processing system comprising a periodic activation processing section (100) that is activated at a predetermined period and executes a predetermined process, the time required for the periodic activation processing section (100) to complete the processing. a measuring means (200) for measuring the measured value of the measuring means (200); a comparing means (300) for comparing the measured value of the measuring means (200) with a predetermined reference value (T_0); The measured value is set to the reference value (T
_0) A periodic activation control method comprising: a period changing means (400) for extending the activation period of the periodic activation processing unit (100) beyond the predetermined period when it is determined that the activation period is longer than the predetermined period. (2) The period changing means (400) includes the comparing means (
300) determines that the measured value is longer than the reference value (T_0), the activation period of the periodic activation processing unit (100) is extended to an integral multiple of the predetermined period. The periodic activation control method according to claim 1.