JPH11232231A - Data division and transfer device and is method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten data transfer time by dividing data and simultaneously transferring the divided data through plural channels in parallel computers constituted of plural processors and a connection device shared by these processors. SOLUTION: The parallel computers are constituted of the connection device 10 and plural processors 21 to 23. In the case of issuing a write command from the processor 21 e.g. the processor 21 divides data, adds divided data identifications(IDs) indicating the order of divided data to respective divided data and transfers the divided data through plural channels 21-4, 21-5 in parallel. The device 10 receives these divided data and reconstitutes these data by referring to the divided data IDs. When the processor 21 issues a read command, the device 10 receives the command, divides the corresponding data, adds divided data IDs indicating the order of the divided data, and transfers the divided data in parallel through the channels 21-4, 21-5. The processor 21 receives these divided data and reconstitutes the data by referring to respective divided data IDs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parallel computer comprising a processing device and a coupling device shared by the processing devices, and relates to a method for reducing a data transfer time between the coupling device and the processing device.

[0002]

2. Description of the Related Art A parallel computer comprising a plurality of processing units and a coupling unit shared by them is described in Japanese Patent Application Laid-Open No. 6-4490, "Data Processing System". According to this, a processing unit (Central Processing Complex: CPC) stores data in a message buffer and uses one channel to
Data is being transferred to the coupling device (SES mechanism).

[0003]

When a processing device writes data to a coupling device, the processing device sends a write command and data to the coupling device over one channel. Also,
When the processing device reads data from the coupling device, the processing device transmits a read command to the coupling device, and the coupling device transmits the read data to the processing device through one channel. As described above, since data is transferred through one channel, there is a problem that as the data size increases, the data transfer time increases.

[0004] It is an object of the present invention to provide a data division and transfer apparatus which can reduce the data transfer time by dividing the data and transferring the data simultaneously through a plurality of channels.

[0005]

According to the present invention, the coupling device and each processing device are connected by a plurality of channels.

When the processing device issues a write command, the processing device divides the data, attaches a divided data identifier indicating the order to the divided data, and transfers the data in parallel through a plurality of channels. When receiving the divided data, the coupling device reconstructs the data by referring to the divided data identifier.

When the processing device issues a read command, the coupling device receives the read command, the coupling device divides the data, attaches a divided data identifier indicating the order, and transfers the data in parallel through a plurality of channels. I do. Upon receiving these data, the processing device reconstructs the data by referring to the divided data identifier.

As described above, according to the present invention, the data transfer time can be reduced by dividing the data between the coupling device and the processing device and transmitting the data in parallel through a plurality of channels.

[0009]

Embodiments of the present invention will be described below.

FIG. 1 is a system configuration diagram of a parallel computer according to the present invention. The system configuration according to the present invention includes a coupling device 10 and three processing devices 21 to 23. The hardware configurations of the coupling device 10 and the processing devices 21 to 23 are the same. The coupling device 10 includes a processor 10-1, a memory 10-2, an IOP (input / output processor: Input OutputPro).
cessor) 10-3 and channel (CH: channel) 10
-11 to 10-16. The coupling device 10 includes shared data 10-2 shared by the processing devices 21 to 23.
There is 0.

The processing device 21 has a channel 1-1 (21-4).
And channel CH1 (10-11) and channel 1-2 (2
1-5) and the channel CH2 (10-12) are used to connect two channels. Similarly, the processing devices 22 and 23 are also connected by two channels. All processing units 2
1 to 23 access the shared data 10-20 of the coupling device 10 by issuing a write command and reading to the coupling device 10.

FIG. 2 is a diagram showing the features of the present invention.

The case where the processing device 21 writes data A (30) having a large size to the combination device 10 will be described. The processing device 21 converts the data A30 into the data A1 (3
1) and data A2 (32) are divided (process 40).
Then, the processing device 21 transfers the data A1 (31) to the coupling device 10 via the channel 1-1 (21-4). Further, the data A2 (32) is transferred to the coupling device 10 via the channel 1-2 (21-5) (processing 41).
-1, 41-2).

On the other hand, the coupling device 10 is connected to the channel CH1 (10
-11) from the data A1 (31) to the channel CH2 (1).
0-12) to receive the data A2 (32) (processing
42-1 and 42-2). Then, the combining device 10 combines the data A1 (31) and the data A2 (32) and writes the data A (30) into the shared data 10-20 (Process 4).
3).

Next, a case where the processing device 23 reads data A (30) from the coupling device 10 will be described. Processing unit 2
3 issues a read command of data A to the coupling device 10 (process 49). Upon receiving this command, the coupling device 10 transmits the corresponding data A (30) to the data A1 (3
1) and data A2 (32) are divided (process 50).
Then, the coupling device 10 transmits the data A1 (31) to the data A2 (32) via the channel CH5 (10-15).
Through the channel CH6 (10-16).
3 (processing 51-1 and 51-2).

On the other hand, the processing unit 23 transmits the data A1 (31)
When data A2 (32) is received (processing 52-1,
52-2) These are combined to integrate the data A (30) (process 53).

As described above, the processing devices 21 and 23 and the coupling device 10 are provided with a plurality of channels 10-11 to 10-16 and 21.
-4 to 23-4 and 21-5 to 23-5, the data is transferred in parallel, so that the data transfer time can be reduced.

FIG. 3 is a diagram showing the structure of shared data.
In order to efficiently manage the shared data 10-20, the coupling device 10 stores data items 81 and 8 when writing data.
2 is created and managed in a queue. A data item control 80 is provided for each queue.

The data item control 80 stores the address of the data item 81 to be connected first. Data item 81
Is the data identifier 81-1, the next data item pointer 81
-2, divided data number 81-3, divided data pointer 81
-4-1 to 81-4-n. The divided data pointers 81-4-1 to 81-4-n indicate the addresses of the divided data 81-5-1 to 81-4-n, respectively.

The data identifier 81-1 is used to identify data before being divided.

The next data item pointer 81-2 stores an address indicating the next data item 82. Data item 8
2 has the same configuration as the data item 81.

FIG. 4 is a diagram showing a data write processing procedure. The processing device 21 has a channel (1-1, 1-2).
It is checked whether or not (21-4, 21-5) is normal, and a normal channel is secured (process 100).

Then, the data size is checked. If the data size is equal to or more than a certain value, the number of secured channels (in this case, 2
Data). If the data size is smaller than the predetermined value, it is determined that the data division transfer is unnecessary, and the data is transferred without being divided as in the conventional case (process 101).

The divided data is provided with a divided data identifier indicating the number of divided data and their order (Process 10).
2).

Then, the processing device 21 transmits the divided data of the write command to the channel 1-1 (21-4) and the channel 1-2 (21-5) (process 103).

The coupling device 10 receives a write command with data (operation 140). Then, the coupling device 10 analyzes the divided data of the write command (processing 141). Further, the coupling device 10 transmits the shared data 10-2.
A data item 82 is newly generated at 0. Further, the coupling device 10 sets a corresponding data identifier. The data item 8 is stored in the next data item pointer 81-2 following the data item 81.
2 is set (processing 142).

When all the divided data are received, the divided data pointer is set with reference to the divided data identifier. In this case, since there are two divided data identifiers, the divided data pointer 1 (82-3-1) stores the divided data A1 (8
2-4-1) is set to the divided data pointer 2
The start address of the divided data A1 (82-4-2) is set in (82-3-2) (process 143).

The combining device 10 integrates the divided data as described above. Finally, the coupling device 10 transmits a response to the processing device 21 for each channel (operation 144).

The processing device 21 receives this response and completes the process (process 104).

FIG. 5 is a diagram showing a data read processing procedure. The processing device 23 issues a read command to the coupling device 10 by designating the data identifier of the read data (process 200). The coupling device 10 receives and analyzes the read command, and searches the shared data 10-20 for data to be read (process 240). Coupling device 1
If the value is 0, the size of the corresponding data is checked. If the size is equal to or larger than a certain value, the data is divided into the number of secured channels (process 241).

Further, the coupling device 10 assigns a divided data identifier indicating the order to the divided data (Process 2
42). The coupling device 10 transmits the divided data and the divided data identifier to the corresponding channel to the processing device 23 (process 243). In addition, a response is transmitted to the channel that received the command (process 244).

The processing device 23 receives the divided data (processing 201). The processing device 23 receives the response (processing
202). The processing device 23 combines the divided data (processing 203).

[0033]

According to the present invention, the data transfer time can be reduced by dividing the data transferred between the processing device and the coupling device and transferring the data in parallel using a plurality of channels.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a parallel computer according to the present invention.

FIG. 2 is a diagram showing features of the present invention.

FIG. 3 is a diagram showing a configuration of shared data.

FIG. 4 is a diagram showing a write processing procedure of the coupling device.

FIG. 5 is a diagram illustrating a reading processing procedure of the coupling device.

[Explanation of symbols]

 10 ... Coupling device, 21-23 ... Processing device.

Claims (5)

[Claims] In a parallel computer comprising a plurality of processing devices and a coupling device shared by the plurality of processing devices, the coupling device and the processing device are connected by a plurality of channels, and the processing device is configured to write data to the coupling device when writing data to the coupling device. , And transferring the divided data in parallel using multiple channels,
The data dividing and transferring device in the parallel computer, wherein the coupling device combines the divided data with the original data by managing the addresses of the divided data when receiving the divided data. 2. The connecting device according to claim 1, wherein the connecting device and the processing device are connected by a plurality of channels, and when the processing device reads data from the connecting device, the connecting device divides the data and divides the divided data into a plurality of data. A data division transfer device in a parallel computer, wherein data is transferred in parallel using a channel, and when the processing device receives these data, they are combined. 3. The data processing system according to claim 1, wherein the processing device or the coupling device checks the data size before transferring the data, and if the data size exceeds a predetermined value, divides the data. Checking and dividing the data with reference to the number of channels. 4. The data division transfer device in a parallel computer according to claim 1, wherein the processing device is provided with a counter indicating the number of data divided into commands when writing data to the coupling device. 5. The data division transfer device in a parallel computer according to claim 2, wherein when reading data from the coupling device, the processing device is provided with a counter indicating the number of data divided in response to the command.