JP2888062B2 - Information processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus in which a central processing unit and a main storage unit are duplicated.

[0002]

2. Description of the Related Art FIG. 1 is a block diagram showing an example of a general information processing apparatus. As shown in FIG. 1, the information processing apparatus of the present embodiment includes an own system central control processing device 10, an own system main storage device 20, an own system central control processing device 10, and an own system main storage device 2.
0, which performs data read / write operation by connecting data to 0, and bus 40, which performs data read / write operation by connecting the own system central control processor 10 and the other system main storage device 21. A write-only bus 50 used only when writing from the own system central control processing device 10 to the other system main storage device 21; the other system central control processing device 11; the other system main storage device 21; A bus 31 for performing a data read / write operation by connecting the device 11 and the other system main storage device 21 and a data read / write operation by connecting the other system central control processing device 11 and the own system main storage device 20 It is composed of a bus 41 for performing a write operation, and a write-only bus 51 used only when writing from the other-system central control processing device 11 to the own-system main storage device 20.

FIG. 3 is a diagram for explaining a conventional operation procedure in FIG. In the configuration shown in FIG. 1, in the asynchronous mode in which the data of the own system main storage device 20 and the data of the other system main storage device 21 are different, the data read operation / write operation between the own system central control processing device 10 and the other system main storage device 21 is performed. When the operation procedure is performed in the order of “read operation 61 → first write operation 71 → next write operation 72”, data read operation / write between the own system central control processing device 10 and the other system main storage device 21 is performed. An operation bus 40 is used as a bus dedicated to a read operation, and a write-only bus 5 used only when writing from the own system central control processing device 10 to the other system main storage device 21.
0 was used as a bus dedicated to a write operation.

Therefore, as shown in FIG. 3, in the order of the first write operation 71 → the next write operation 72, if the first write operation 71 is not completed, the next write operation 72 is performed.
Could not move to.

[0005]

In this conventional information processing apparatus having a duplex configuration, the data of the own main memory and the data of the other main memory are different from each other in the asynchronous mode in the asynchronous mode. In the continuous write operation to the system main storage device, it is not possible to proceed to the next write operation unless the first write operation is completed.

[0006]

An information processing apparatus according to the present invention comprises: a self-system, another-system central control processor and a self-system, other-system main storage device having a duplex configuration; A first bus which is connected to the own main memory to perform a data read / write operation, and wherein the own central control processor performs a data read / write operation with the other main memory; An information processing apparatus having a second bus to be performed and a write-only bus used only when data is written from the self-system central control processing device to the other-system main storage device. When the operation procedure between the self-system central control processing device and the other-system main storage device is performed in the order of read operation → write operation → write operation in the asynchronous mode in which they do not match, the second bus → the write only Bus → No. Characterized by the use in sequence of the bus.

[0007]

Next, the present invention will be described with reference to the drawings. Referring to FIG. 1, in an information processing apparatus having a duplex configuration according to an embodiment of the present invention, a local central processing unit 10 performs a data read / write operation between itself and a local main storage device 20 via a bus 30. And a bus 40 for performing a data read / write operation with the other system main storage device 21 which is not clock-synchronized. It is used only when writing to the other system main storage device 21.

Next, the operation of this embodiment will be described with reference to FIG. FIG. 2 is a diagram for explaining the operation procedure of one embodiment of the present invention in FIG.

In the configuration shown in FIG. 1, in the asynchronous mode in which the data of the main system main storage device 20 and the data of the other system main storage device 21 are different, the main system central control processing device 10 and the other system main storage device 2
1 is used as a bus for performing a data read / write operation and a write operation as well as a read operation.

When the data read operation / write operation between the own system central control processor 10 and the other system main storage device 21 is performed in the order of "read operation 62 → first write operation 73 → next write operation 74". A bus 40 for connecting the own system central control processing device 10 and the other system main storage device 21 to perform a data read / write operation → writing from the own system central control processing device 10 to the other system main storage device 21 Write-only bus 50 used only at the time → connection of the own system central control processor 10 and the other system main storage device 21 to read / read data.
They are used in the order of the bus 40 for performing the write operation.

When a data read operation / write operation is performed between the other system central control processing device 11 and the own system main storage device 20, the other system central control processing device 11 and the own system main storage device 20 are similarly operated. Bus 41 for performing a data read / write operation by connecting to the bus → a write-only bus 51 used only when writing from the other system central control processor 11 to the main system main storage device 20 → the other system central control processor 11 And the local main storage device 20 are used in the order of the bus 41 for performing the data read / write operation by connecting.

According to the operation of this embodiment, as shown in FIG. 2, even if the first write operation is not completed, the next write operation can be started by using the other free bus. Therefore, the time T2 of the data read / write operation is shorter by the time T3 than the time T1 (shown in FIG. 3) in the conventional example, and the operation ends earlier.

[0013]

As described above, according to the present invention, the data between the self-system central control processing device and the other-system main storage device in the asynchronous mode in which the data of the main-system main storage device and the data of the other-system main storage device are different from each other. Read / write operation is changed to “read operation →
When performing in the order of “first write operation → next write operation”, it is possible to shift to the next write operation without being affected by the first write operation, so that there is an effect that the processing capability can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of a general information processing apparatus.

FIG. 2 is a diagram for explaining an operation procedure of one embodiment of the present invention in FIG. 1;

FIG. 3 is a diagram for explaining a conventional operation procedure in FIG. 1;

[Explanation of symbols]

10 Self-system central control processor 11 Other-system central control processor 20 Self-system main storage device 21 Other-system main memory device 30 Reads / writes data between own-system central control processor and self-system main storage device Bus 31 for performing a data read / write operation between the other-system central control processing device and the other-system main storage device Bus 40 for performing a data read / write operation for the own-system central control processing device and the other-system main storage device Bus 31 A bus for reading / writing data between the other system central control processing device and the own system main storage device 50 A write-only bus used only at the time of a write operation from the own system central control processing device to the other system main storage device 51 Write-only bus 61, 62 Read operation 71, 73 First write operation 72, 74 Next, write-only bus used only at the time of write operation from other system central control processing device to own system main storage device Write operation of

Claims (1)

(57) [Claims] A self-system / other-system central control processor and a main-system / other-system main storage device having a duplex configuration; and the self-system central control processor is connected to the self-system main storage device. A first bus for performing a data read / write operation on the second system, a second bus for performing the data read / write operation of the own system central control processor with the other system main storage device, An information processing device having a write-only bus used only when data is written from the processing device to the other system main storage device, wherein the own system central control processing device is used in an asynchronous mode in which the main storage devices of both systems do not match. When the operation procedure between the main system and the other system main storage device is performed in the order of read operation → write operation → write operation, the second bus is used in the order of the write-only bus → the second bus. Characterized by Information processing device.