JPH05252552A - Load control system - Google Patents

Abstract

PURPOSE:To make a station design simpler than a conventional technique depending on the number of buffers, and to reduce a delay time or a load due to the dependence of a processing on a software side. CONSTITUTION:When a central control unit 1 operates an input signal processing by an on-line, a utilizing efficiency measuring part 11 periodically measure a utilizing efficiency under the control of a timer control part 13 (processing step S1-S3). An interruption control part 12 receives the measured result of the utilizing efficiency, and judges whether or not the measured value is within a preliminarily decided reference value (S4). And also, when the measured value is beyond the reference value, the interruption control part 12 judges whether or not the number of times continuously generated within a prescribed time is more than (n) (S5), judges the danger of an influence on the other processing when the number of times of more than (n), starts an interruption program, and controls the input signal processing (S6).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load control system, and more particularly to a load control system utilizing the utilization efficiency of a central controller of an online real-time system.

[0002]

2. Description of the Related Art Conventionally, in this type of load control system, the load is controlled by limiting the number of input signals as an online real-time system that can be processed by the number of buffers that take in input / output signals. That is, when all the input buffers to be fetched are used, the system concentrates on the internal processing without fetching any more input signals.

[0003]

In this conventional load control system, the number of input signals that can be fetched is determined by the number of buffers. Therefore, if an extra number of buffers is prepared at the time of system design, even if there are empty buffers, the buffer will be Since the control device could not handle all the processing, there was a possibility that the central control device would actually be congested. On the contrary, if the number of buffers is reduced, all the buffers become busy when the efficiency of use of the central control unit is low, and the input signal is restricted, so that the central control unit is operated with poor utilization efficiency.

In other words, the conventional load control has a problem that it largely depends on the design value itself of the number of buffers and that the design of the number of buffers is very difficult. In addition, when the number of dynamic steps of the service increases due to the addition of the function, there is a problem that the number of buffers needs to be changed each time.

The object of the present invention is to
An object of the present invention is to provide a load control system in which a signal control is applied according to the usage efficiency of a central control device.

[0006]

The load control system of the present invention is characterized in that the central control unit of the online real-time system is provided with a utilization efficiency measuring unit for measuring the utilization rate of its own central control unit.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1A is a block diagram of a central control unit showing an embodiment of the present invention, and FIG. 1B is a flow chart showing the operation in FIG.

The central control unit 1 of the present embodiment has a utilization efficiency measuring section 11 for measuring the utilization efficiency of an online system while processing an input signal, and a utilization efficiency measurement value exceeding a reference value. An interrupt control unit 12 for notifying the software of the input regulation and a timer control unit 13 for managing various processing times of the central control unit are provided. The software is stored in the main storage device 2.

Next, the operation of this embodiment will be described.
When the central controller 1 is performing the input signal processing online, the usage efficiency measuring unit 11 periodically measures the usage efficiency under the control of the timer control unit 13 (processing step S
1, ~ 3). The interrupt control unit 12 receives the measurement result of the usage efficiency and judges whether or not the measured value is within a predetermined reference value (S4). If the measured value exceeds the reference value, the number of times is continuously within a predetermined time. The number of occurrences n times or more (S
5) If it exceeds n times, it is judged that it may affect other processing, and the interrupt program is activated to regulate the input signal processing (S6).

If S4 is Yes (use efficiency is within the reference value) or S5 is No (the number of consecutive times is less than n times), the process returns to S2 and the input signal processing is continuously executed.

[0011]

As described above, according to the present invention, the utilization efficiency measuring function of the central control unit is utilized,
The station design is simpler than the conventional technology that depends on the number of buffers, and the delay time and the burden due to the processing dependence on the software side are reduced.

[Brief description of drawings]

FIG. 1A is a block diagram of a central control unit showing an embodiment of the present invention, and FIG. 1B is a flowchart showing an operation in FIG. 1A.

[Explanation of symbols]

 1 Central Control Unit 2 Main Memory Unit 11 Usage Efficiency Measuring Unit 12 Interrupt Control Unit 13 Timer Control Unit

Claims (1)

[Claims] 1. A load control system in which a central control unit of an online real-time system is provided with a utilization efficiency measuring means for measuring a utilization rate of its own central control unit.