JPH03263154A - Data processing system - Google Patents

Abstract

PURPOSE:To improve the processing capacity of the system by adding a channel number of 'processing data read-out' to an input/output controller, and curtailing the number of times of issue of a channel program actuating I/O instruction of a processing processor. CONSTITUTION:The system is constituted of a processing processor 10, a system bus 20, an input/output controller 30, host computers 40, 50 and 60, and a processing data bus 70. In such a state, a channel number of 'processing data read-out' is added to the input/output controller 30, processing data transfer requests of the host computers 40, 50 and 60 are checked up, an arbitration is executed, a host number is added to processing data sent from a host and it is transferred to the processing processor 10, by which the number of times of issue of a channel program actuating I/O instruction of the processing processor 10 is curtailed. In such a way, the processing capacity of the system can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data processing system, and more particularly to a data processing system in which one processing processor processes processing data from a plurality of host computers.

[Conventional technology]

In order to read processing data from a plurality of host computers, a processor of a conventional data processing system activates a plurality of channel programs corresponding to the host computers in an input/output control device.

[Problem to be solved by the invention]

The activation of the channel program of the conventional data processing system described above is executed by the activation IO command of the channel program, but when the processing processor issues this activation IO command, the input/output control device does not accept or accept the ■○ command. It is necessary to monitor whether the

The response time of an input/output control device when receiving an IO command increases depending on the number of connected host computers, and in the worst case, the input/output control device may refuse to receive or receive an IO command.

Therefore, there is a problem in that the throughput of the processor, input/output control device, and host computer, that is, the entire system is reduced.

An object of the present invention is to solve the problems caused by the above-mentioned prior art.
By adding the channel number of the PA processing data read PA to the input/output control device, the purpose is to reduce the number of times the processor's channel program start ■○ command is issued and improve the processing capacity of the system.

[Means to solve the problem]

In the configuration of the data processing system of the present invention, a plurality of host computers and one processing processor are connected by one input/output control device that operates with a channel program, and the input/output control device has a channel number corresponding to the host computer. When the input/output control device reads out the processing data of one host computer, the input/output control device reads out the processing data of one host computer, and then executes the processing. The processing data of the host computer is processed by the processing processor, and the processing result data is sent to the input/output control device by a channel program activation IO command for writing processing result data to one host computer. Activation I of a channel program for the input/output device of the processing processor in a data processing system that notifies a host computer that is an issuer of processed data.
By setting the channel number for "read processing data" in the O command instead of the channel number corresponding to the host computer, the input/output control device that executes the channel program can read the processing data from the plurality of host computers. a first means for checking a transfer request; a second means for reading processing data from the host computer in which the processing data transfer request exists; and adding header information including a host computer number to the beginning of the read processing data. Then, the third processing data holding means repeatedly executes the first means to the third means until the number of transfer bytes of processing data given by the channel program of the processing processor is reached. When the number of bytes is reached, the contents of the processing data buffer are transferred to the processing processor, thereby reducing the number of times an IO command is issued to the input/output control device.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, in which 1o is a processor, 20 is a system bus, 30 is an input/output control device, 40, 50, and 60 are host computers 1, 2.
, 3.70 is a processing data bus, 80, 90, 100 are processing data buffers of host computers (1), (2), (3), and 110 is a read channel program starting I.
O command determination circuit; 120 is a processing data request determination circuit; 1
30 is a host number addition circuit, and 140 is a processing data buffer of the input/output control device.

The host computer (1) 40, the host computer (2>50), and the host computer (N>60) send data to the input/output control device 30 via a processing data bus 70.

The processing processor 10 uses the system bus 20 to receive processing data to be processed, and the input/output control device 30
, an IO command for starting a channel program is executed using the channel number of ``Read processing data''.

The input/output control device 30, which has determined the channel number for "read processing data" by the read channel program activation IO command determination circuit 110, checks the processing data request on the processing data bus 70 by the processing data request determination circuit 120.

The input/output control device 30 includes a processing data request determination circuit 120
The computer starts reading and transferring processing data to the attached host computer.

Now, when the processing data request of the host computer (2) 50 is accepted, the contents of the processing data buffer 90 of the host computer (2) 50 are taken into the input/output control bag N30 using the processing data bus 70. .

Here, the input/output control device 30 adds a host number indicating from which host computer this processing data has been transferred, using the host number adding circuit 130, and adds the host number to the processing data buffer 140 of the input/output control device 30. to hold.

The input/output control device 30 includes a processing data request determination circuit 120
If there is another processing data transfer request from the host computer, read and transfer until the number of transfer bytes given by the channel program is reached (check the processing data transfer request, fetch the processing data using the processing data bus, Repeat (adding a number).

If there is no other processing data request or the number of transfer bytes given by the channel program is reached, the input/output control device 30 transfers the contents of the processing data buffer 140 of the input/output control device 30 to which the host number has been added. The data is transferred to the processing processor 10.

The processing processor 10 processes the processing data transferred from the human output control device 30, and sends the processing results to the input/output control device 30 using the system bus 20 by specifying the channel number of the corresponding host computer. Transfer as the exit status and complete the series of operations.

〔Effect of the invention〕

As explained above, the present invention provides "processed data reading"
The channel number of the input/output controller is added to the input/output control device, the process data transfer request from the host computer is checked, the process data is arbitrated, and the process data sent from the host is added with the host number and transmitted to the processing processor. It is possible to reduce the number of times the processor's channel program activation IO command is issued and improve the processing capacity of the system.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. 10...processor, 20...system bus,
30... Input/output control device, 40... Host computer 1.50... Host computer 2.60...
Host computer 3.70...Processing data bus, 80
...Processing data buffer of host computer 1, 9
0... Processing data buffer of host computer 2,
100...Processing data buffer of host computer 3, 110...Reading channel program startup ○
Command discrimination circuit, 120... Processing data request discrimination circuit,
130: Host number addition circuit, 140: Processing data buffer of input/output control device.

Claims (1)

[Claims] When a plurality of host computers and one processing processor are connected by one input/output control device that operates with a channel program, and are connected to the input/output control device with a channel number corresponding to the host computer,
Channel program activation IO for reading processing data from the processing processor to one host computer
According to the command, the input/output control device reads processing data of one host computer, transfers it to a processing processor, processes the processing data of the host computer with the processing processor, and transfers the processing result data to the input/output control device. In a data processing system, a channel program activation IO command for writing processing result data to one host computer is used to notify a host computer, which is a processing data issuer, of a channel program for the input/output device of the processing processor. By setting a "processing data read" channel number in the startup IO command instead of a channel number corresponding to the host computer, the input/output control device that executes the channel program can read processing from the plurality of host computers. a first means for checking a data transfer request; a second means for reading processing data from the host computer in which the processing data transfer request exists; until the number of transfer bytes of processing data given by the third processing data holding means and the channel program of the processing processor is reached;
The first means to the third means are repeatedly executed, and when the number of transfer bytes is reached, the contents of the processing data buffer are transferred to the processing processor, thereby issuing an IO command to the input/output control device. A data processing system characterized by reducing the number of issues.