JPS63245548A - Composite computer system - Google Patents

Abstract

PURPOSE:To quickly transmit and receive data between computers by writing data in a prescribed location of a shared memory by a first computer to interrupt a second computer and reading out data from the memory by the second computer. CONSTITUTION:A shared memory 13 is shared between first and second computers 11 and 12, and data is transmitted and received between computers 11 and 12 through the memory 13. The computer 11 interrupts the computer 12 by a hardware device 14 by data write on the prescribed location of the memory 13 to inform the computer 12 of data write to the memory 13 for the purpose of transmitting data from the computer 11 to the computer 12. Then, data written on the prescribed location of the memory 13 is read out by the computer 12. Thus, data is transmitted and received between computers at a high speed.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention has a shared memory that is commonly used by a plurality of computers and a total of 8 r3Ia, and is capable of transmitting and receiving data between each computer. The present invention relates to a compound computer system that performs operations via the shared memory.

<Prior Art> Conventionally, in this type of complex 111Hi system, when transmitting data from a first computer to a second computer, the first computer first accesses the shared memory and stores a predetermined portion of the shared memory. Incorporate data into locations,
After this writing, V! from the first computer to the second total ts machine! The second computer receives the data from a predetermined location in the shared memory by accessing the shared memory in response to this interrupt. Ta.

(Problems to be Solved by the Invention) In the conventional data transmission procedure described above, after the first computer accesses and writes data to the shared memory, it interrupts the second computer and writes the transmitted data to the shared memory. Since the notification of writing to is performed, there is a problem in that it takes extra data transmission time and increases overhead time.

The present invention has been made in view of the above, and an object of the present invention is to provide a multifunction computer system that can exchange data between computers with a short overhead time.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the compound computer system of the present invention has a plurality of computers and a shared memory commonly used by each computer. , is a compound computer system in which data is exchanged between the same computers via the shared memory, and as shown in FIG. an interrupt means 3 that interrupts a second computer in a hardware manner by writing data from the second computer to a predetermined location of the shared memory; and a predetermined location of the shared memory in response to the interrupt operation. A second computer reads out the data written in the second computer.

(Function) In the compound computer system of the present invention, the first computer writes data to a predetermined location in the shared memory to cause a hardware interrupt to the second set of f3 machines, and responds to this interrupt operation. At No. 1, the second computer is reading data from a predetermined location in the shared memory.

(Example) Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 2 is a configuration diagram of a compound computer system according to an embodiment of the present invention. The compound computer system shown in the figure is
calculator 11, second IL calculator 12, and double-point calculator 11
．． 12, and a hardware device 14 that interrupts the second 1tl 112 under the control of the first computer 11. In this figure, only two computers, the first and second, are shown to simplify the explanation, but the number is not limited to two, and three or more computers may be used. Yes, 3
Even if the number of units is more than one, the configuration is similar.

In the multicomputer system configured in this way, when transmitting data from the first computer 11 to the second computer 12, the data is written from the first computer 11 to a specific address in the -H shared memory 13. , the second computer 12 reads the data written to a specific address in the shared memory 13 via the shared memory 13. In this case, the first computer 11 writes data to the shared memory 13. In this embodiment, the hardware device 14 is used to notify the shared memory 13 from the first computer 11 that data has been imported, and the first computer 11 writes the data to the shared memory 13. The second meter ts from the hardware device 14 may be
This is to notify the device 12 that the data has been restored to the shared memory 13 by generating an interrupt.

Next, the operation will be explained with reference to the flowchart shown in FIG.

The operation when transmitting data from the first computer 11 to the second computer 12 will be described.

First, when the first computer 11 starts accessing the memory (step 100), it is checked whether this memory access is an access to the shared memory 13 (step 110). If the access is not to the dedicated memory (step 120), it is checked whether the access is to a specific address in the shared memory 13 (step 120).
Step 130). If the specific address of the shared memory 13 is not accessed (step 140), the transmission data is written to the specific address of the shared memory 13 (step 150).

When this data write operation is performed, the hardware device 14 is activated and interrupts the second counter 112 (step 160). When the second computer 12 receives an interrupt from the hardware device 14, it reads the transmission data from the first computer 11 written in a specific address of the shared memory 13, and thereby the second computer 12
receives data from the second rule 11 (step 170).

FIG. 4 is a configuration diagram of a compound computer system according to another embodiment of the present invention. The compound computer system of this example is
The only difference is that a shared memory 23 having a message queue 23a is used as the shared memory 13 in the embodiment of FIG. 2, and the other configurations are the same as the configuration of FIG.

In the shared memory 23 having the message queue 23a, transmission data is stored at the top of the message queue 238 designated by the message pointer, and the specific address becomes the entry address for the message queue 23a.

Next, the operation will be explained with reference to the flowchart in FIG.

Similar to the flow shown in FIG. 3, access to the memory starts from the first Elejl11, and it is checked whether this memory access is to the shared memory 23 and whether it is an access to a specific address in the shared memory 23. (Steps 200-230>. If there is no access to a specific address (Step 240),
Transmission data is written to a specific address in the shared memory 23. In this case, since the shared memory 23 has a message queue 23a, the message queue 2 specified by the message queue pointer is written.
Transmission data from the first calculation 111 is written to 3a (step 250).

When this data write operation is performed, the hardware device 14 is activated and interrupts the second computer 12 (step 260). The second 81 smart machine 12 is a hardware installation a! 214, the shared memory 23 is accessed and data is read from the message queue 23a specified by the message queue pointer of the shared memory 23, thereby performing the second calculation 11112.
receives data from the first computer 11 (
step 270).

r Effects of the Invention] As explained above, according to the present invention, the first IIT
&? When data is written from the machine to a predetermined location in the shared memory, the first computer issues a hardware interrupt to the second computer, and in response to this interrupt operation, the second computer writes data to the shared memory. Since data is read from a predetermined location, data can be exchanged between computers at high speed and with short overhead time.

[Brief explanation of the drawing]

Fig. 1 is a claim correspondence diagram of the present invention, Fig. 2 is a configuration diagram of a compound computer system according to an embodiment of the present invention, Fig. 3 is a flowchart showing the operation of the compound computer system of Fig. 2, and Fig. 4 FIG. 5 is a flowchart showing the operation of the compound computer system of FIG. 4. FIG. 5 is a flowchart showing the operation of the compound computer system of FIG. 1...Writing means 3...Interrupting means 5...
Reading means 11...First computer 12...Second total 911 13.23...Shared memory 14...
・Hardware equipment Figure 1 Figure 2

Claims (1)

[Claims] A compound computer system having a plurality of computers and a shared memory commonly used by each computer, and transmitting and receiving data between the computers via the shared memory,
An interrupt that causes a hardware interrupt to a second computer by writing data from the first computer to a predetermined location in the shared memory in order to transmit data from the first computer to the second computer. A multifunction computer system comprising: a reading means for reading the data written to a predetermined location of the shared memory from a second computer in response to the interrupt operation.