JPH05282261A - Control system for information processing system - Google Patents

Abstract

PURPOSE:To sufficiently display the performance of a multiprocessor control system by switching an execution destination CPU for a terminal equipment as necessary so that the load of each CPU can be equal. CONSTITUTION:A load judging mechanism part 7 is operated at a preliminarily decided constant time interval (for example, 1 minute interval). The load judging mechanism part 7 calculates the total value of the load information of entire CPU (CPU1-CPUn) of a CPU group 2 stored in a CPU load state table 6, searches the optimal load value (mean value) of each CPU by dividing the value into the number (n) of the CPU, and searches a difference (ratio) between the optimal load value (mean value) and the load information of each CPU. Then, when the value is beyond a preliminarily decoded range, the load of each CPU is judged to be unequal, and the load judging mechanism part 7 changes the execution destination CPU of a terminal load state table 5 so that the optimal load value (mean value) of each CPU can be obtained, based on the load information of the terminal load state table 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control system for an information processing system, and more particularly to a host system having a plurality of central processing units and a plurality of terminal devices connected to the host system via communication lines. The present invention relates to a control method for an information processing system that includes a plurality of central processing units of a host system and controls the plurality of terminal devices.

[0002]

2. Description of the Related Art A host system having a plurality of central processing units (CPU) and a plurality of terminal devices connected to the host system via a communication line are provided, and the control of the plurality of terminal devices is controlled by the host system. The control method of the conventional information processing system of the so-called multiprocessor control method in which the processing is shared by a plurality of central processing units is the operation start of the terminal device (usually power-on: Power
On) is detected by the host system, and the CPU that controls the terminal device is assigned by the following method.

For example, two CPUs (CPU1 and C
When four terminal devices (terminal device T1 to terminal device T4) are connected to a host system having PU2), when the terminal device T1 first enters the operation start state, the host system causes both the CPU1 and the CPU2 to operate. Since the control of the terminal device is not assigned, the control of the terminal device T1 is assigned to the CPU 1 and the information is stored. next,
When the terminal device T2 enters the operation start state, the host system allocates the control of the terminal device T2 to the CPU having the smallest allocation of the terminal device to be controlled among the plurality of CPUs, that is, the CPU2. Similarly, when the terminal device T3 and the terminal device T4 enter the operation start state, the respective controls are executed by the CPU.
1 and CPU2. When the terminal device T1 to the terminal device T4 are in a stopped state (usually power off: Power Off), the host system detects that and sets the terminal device to C
Disconnect from PU and reduce the number of terminal devices assigned to CPU.

[0004]

The multiprocessor control method of the conventional information processing system as described above is a simple method of allocating a terminal device to be controlled to a plurality of CPUs by starting the operation of the terminal device. , The CPU assigned to the terminal device is in the idle state when the terminal device is in the operation start state but the actual transmission / reception of the data with the host system is not performed.
There is a problem in that the load of U becomes uneven and the effect of the multiprocessor control system cannot be fully exerted.
Also, when viewed from the side of the terminal device, it is not possible to receive the capabilities of the plurality of CPUs of the host system evenly, so that there is a drawback that the load is concentrated on a specific terminal device and the original performance of the information processing system cannot be exhibited.

[0005]

A control method for an information processing system according to the present invention comprises a host system having a plurality of central processing units, and a plurality of terminal devices connected to the host system via communication lines. In the control method of the information processing system, wherein the host system includes: a plurality of central processing units of the host system, which control the plurality of terminal devices.
A CPU load measuring mechanism unit that measures the load of each of the plurality of central processing units, a terminal load state table that stores information of the CPU load measuring mechanism unit, and a designated execution destination central processing unit, and the CPU load measurement A CPU load state table for storing information on the mechanical section;
A load determination mechanism unit that periodically calculates the load states of the plurality of central processing units based on information of the PU load state table, and the execution destination central processing of the terminal load state table based on information of the load determination mechanism unit. When the unit designation is changed and the data is transmitted / received to / from the terminal device, the execution destination CPU switching mechanism unit of the terminal control unit of the host system is operated to execute the execution destination center specified in the terminal load state table. Controlling the terminal device by means of a processing unit.

[0006]

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

FIG. 1 is a block diagram showing an example of an information processing system to which an embodiment of the present invention is applied.

In FIG. 1, a host system 1 includes a CPU group 2 having n CPUs (CPU1 to CPUn), and m terminal devices T1 to T1 via a communication line 8.
The so-called multiprocessor control for simultaneously controlling a plurality of terminal devices is performed by the terminal control unit 3 connected to the terminal device group 9 including the terminal device Tm.

Terminal device group 9 (terminal device T1 to terminal device T
The CPUs (CPU1 to CPUn) that control m) have predetermined terminal devices in charge of the respective CPUs, and the information thereof is stored in the terminal load state table 5. When the terminal device T1 to the terminal device Tm are in the operation start state, the terminal control unit 3 detects it, and the execution destination CPU switching mechanism unit 31 provided in the terminal control unit 3 refers to the terminal load state table 5. CPU that controls the terminal device
(Execution destination CPU) is searched and the CPU group 2 is instructed to perform control by the corresponding CPU.

After that, the terminal device group 9 becomes the host system 1.
When the transmission / reception of data is started, the CPU load measurement mechanism unit 4 inputs the number of times of transmission / reception of each of the terminal device T1 to the terminal device Tm from the terminal control unit 3, and uses that as load information and applies to the corresponding terminal load state table 5. Add to the column (load information area) and record. At the same time, the execution destination CPU is obtained from the terminal load state table 5, and the same information is added and recorded in the corresponding column (load information area) of the execution destination CPU in the CPU load state table 6.

The load determination mechanism 7 operates at a predetermined fixed time interval (for example, 1 minute interval), and the CPU
The total value of the load information of all CPUs (CPU1 to CPUn) of the CPU group 2 recorded in the load state table 6 is calculated, and the value is divided by the number of CPUs (n) to obtain the optimum load value of each CPU ( Average value), and the optimum load value (average value)
And the difference (ratio) between the load information of each CPU. When this value is within a predetermined range (for example, 5% or less), it is determined that the loads on the CPUs are equal, and the execution destination CPU for control of each terminal device is not changed.

When the value of the difference (ratio) of the load information exceeds a predetermined range, it is determined that the loads on the CPUs are uneven, and the load determining mechanism unit 7 causes the load of the terminal load state table 5 to be determined. Based on the information, the execution destination C of the terminal load state table 5 is adjusted so as to match the optimum load value (average value) of each CPU.
Change PU.

The terminal control unit 3 dynamically determines the execution destination CPU by referring to the terminal load state table 5 by the execution destination CPU switching mechanism unit 31 when transmitting and receiving data to and from the terminal device. Can be switched. Therefore, the load on each CPU can be equalized.

[0014]

As described above, the control method of the information processing system of the present invention is such that each C of the host system is periodically
By monitoring the load state of the PU and switching the execution destination CPU to the terminal device at any time so that the load of each CPU becomes equal, it is possible to equalize the load of each CPU of the host system. Therefore, there is an effect that the performance of the multiprocessor control system can be sufficiently exhibited.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of an information processing system to which an embodiment of the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Host system 2 CPU group 3 Terminal control section 4 CPU load measuring mechanism section 5 Terminal load state table 6 CPU load state table 7 Load judging mechanism section 8 Communication line 9 Terminal device group 31 CPU switching mechanism section

Claims (2)

[Claims] 1. A host system having a plurality of central processing units, and a plurality of terminal devices connected to the host system via a communication line, wherein the control of the plurality of terminal devices is controlled by the host system. In a control method of an information processing system in which processing is shared by a plurality of central processing units, a CPU load measuring mechanism unit for measuring respective loads of the plurality of central processing units in the host system, and the CPU load A terminal load state table storing information of the measurement mechanism unit and a designated execution central processing unit; a CPU load state table storing information of the CPU load measurement mechanism unit;
A load determination mechanism unit that periodically calculates the load state of each of the plurality of central processing units according to the information of the U load state table, and the execution destination of the terminal load state table based on the information of the load determination mechanism unit. Changing the designation of the central processing unit and controlling the terminal device by the execution destination central processing unit designated in the terminal load state table when transmitting / receiving data to / from the terminal device. And control method of information processing system. 2. A host system having a plurality of central processing units, and a plurality of terminal devices connected to the host system via a communication line, wherein the host system controls the plurality of terminal devices. In a control method of an information processing system in which processing is shared by a plurality of central processing units, a CPU load measuring mechanism unit for measuring respective loads of the plurality of central processing units in the host system, and the CPU load A terminal load state table storing information of the measurement mechanism unit and a designated execution central processing unit; a CPU load state table storing information of the CPU load measurement mechanism unit;
A load determination mechanism unit that periodically calculates the load states of the plurality of central processing units based on the information of the U load state table, and the execution destination central processing of the terminal load state table based on the information of the load determination mechanism unit. When changing the unit designation and transmitting / receiving data to / from the terminal device,
It is characterized in that the execution destination CPU switching mechanism unit of the terminal control unit of the host system is operated to control the terminal device by the execution destination central processing unit specified in the terminal load state table. Control method of information processing system.