JPS63193252A - Macrocommand processor - Google Patents

Abstract

PURPOSE:To preclude a redundant access to a main storage by receiving a macrocall, a macroinstruction, and a parameter from a channel and coupling them with the channel only at the time of data transfer. CONSTITUTION:When a computer system is started up, a CPU 1 distinguishes plural input/output instruction sequences from macroinstruction names and sends them out to a macroinstruction processor 7 through the channel 2. The processor 8 of this processor 7 stores a memory 10 in order with plural input/ output instruction sequences sent out of the channel 2 with the instruction of a program read out of a control storage 9 according to the macroinstruction names. This processor 8 monitors a macrocall sent out of the channel 2 and when it is detected, a corresponding macroinstruction is read out of the memory with a macroinstruction name which is inputted successively and combined as an input/output instruction sequence with a parameter, so that the resulting instruction is sent out to an input/output controller 4 in order. Therefore, the controller 4 operates similarly in the case of coupling directly with the channel 2.

Description

[Detailed Description of the Invention] [Summary] When receiving an input/output command sequence from the central processing unit and controlling the input/output device, the main memory, channel, and input/output control device receive one input/output command, The action state M for it
In order to solve the problem of having to combine each report one by one, a macro command processing device is installed, and by specifying the macro command name from the central processing unit, the macro command processing device processes a series of input/output command strings. to reduce the load on channels and main memory.

[Industrial Field of Application] The present invention relates to a computer system, and particularly to a macro command processing device that reduces the load on channels and main memory and increases the processing efficiency of the entire system.

In recent years, the processing power of central processing units in computer systems has been rapidly increasing, but the performance of input/output devices such as external memory F devices connected to the central processing unit has been relatively low. For this reason, there is an idea to increase the number of input/output devices connected to the central processing unit to maximize the capabilities of the central processing unit.

By the way, in order for the central processing unit to use more input/output devices, is there an input/output system that controls the input/output devices? It is necessary to reduce the coupling time and number of switching between the No. 11 device and the central processing unit or channel.

[Conventional technology]

FIG. 3 is a diagram explaining the conventional technique.

When executing input/output processing, the central processing unit 1 forms an input/output command string in the main memory 3 and instructs the channel 2 to process this input/output command string. Channel 2 accesses main memory 3, continuously outputs input/output commands from this input/output command string, transfers them to input/output control unit 4, and when the completion of processing of this input/output command is reported, Transfer the next input/output command.

The input/output control device 4 interprets the transferred input/output commands and, for example, if it is instructed to control the input/output device 5, controls the operation of the input/output device 5, and controls the input/output in response to the input/output command. After the device 5 completes its operation, its execution status is sent back to the channel 2 via the input/output control device 4. Channel 2 reads the next input/output command from ta3 and transfers it to input/output control j111 device 4.

The above procedure is repeated until the input/output 3771 columns are completed. The same applies when the input/output command string instructs the control of the input/output device 6.

[Problem that the invention seeks to solve]

As mentioned above, conventional input/output processing involves reading out each input/output command from the flJ main memory for each command in a series of input/output commands, and (2)
) Transferring the input/output command to the input/output control device, (3)
(4) reporting of the operating status of the input/output device in response to the input/output command; therefore, the jQs, channels, and input/output control devices need to be coupled one by one.

Therefore, the input/output device of the channel waits for the operation of the input/output device, the input/output device waits for the next input/output command, the input/output processing execution time increases, and redundant routine operations such as those in (1) to (4) above occur. Because the process is repeated, the load on the channels and main memory becomes heavy (and there is a problem that the central processing unit cannot fully utilize its processing capacity).

[Means for solving problems]

FIG. 1 is a block diagram of the principle of the present invention.

The macro command processing device 7 is composed of a processor 8, a control memory ta9 storing a program for instructing the operation of the processor 8, and a memory IO for storing macro commands.

The central processing unit 1 selects a plurality of frequently used routine input/output command sequences and defines them as macro commands.
A macro call for the central processing unit 1 to instruct this macro command and parameters necessary for executing the macro command are defined.

Then, when starting up the computer system, the central processing unit 1 distinguishes a plurality of input/output command sequences by macro command name, and sends them to the macro command processing unit 7 via the channel 2.

The processor 8 of the macro command processing device 7 has a control memory 9
A plurality of input/output command sequences sent from the channel 2 are sequentially stored in the memory 10 based on the macro command name according to instructions from the program read from the program.

The processor 8 monitors device calls made up of the channel 2, and transmits commands other than macro calls and response information from the input/output control device 4 to those commands as they are; , import this and perform the following processing.

When the processor 8 detects a macro call, it reads the corresponding macro command from the memory IO according to the subsequently inputted macro command name, combines it with the variable make as an input/output command string, and sequentially sends it to the input/output control device 4.

Therefore, input/output control device 4 can operate in the same way as when connected directly to channel 2, and the central processing unit only needs to send out macro calls, macro commands, command names, and parameters. Preferably, channel 2 need only be coupled to macro command processing device 7 only when transferring data.

The operating status report of the input/output control device 4 and input/output devices after executing this macro command is absorbed by the macro command processing device 7, but serious errors are reported to channel 2 as errors during macro command execution. do.

[Effect]

With the above configuration, the macro command processing device 7 receives macro calls, macro command names, and parameters from channel 2, and only needs to be connected to channel 2 during data transfer, allowing routine operations. In this case, channel 2 is not required to perform redundant processing, and therefore redundant access to the main memory can be prevented.

〔Example〕

FIG. 2 is a block diagram of a circuit showing one embodiment of the present invention.

The central processing unit selects a plurality of frequently used routine input/output command sequences and defines them as macro commands.
A macro invocation name for the central processing unit 1 to instruct this macro command and parameters necessary for executing the macro command are defined. Then, when starting up the computer system, the central processing unit 1 distinguishes a plurality of input/output command sequences by macro command name, and sends them to the macro command processing unit 7 via the channel 2.

The processor 8 of the macro command processing device 7 has a control memory 9
Based on the macro command name input via the interface circuit 11, a plurality of input/output command sequences sent from the channel 2 are sequentially stored in the memory IO according to instructions from the program read from the IO.

When the above processing is completed, the processor 8 starts monitoring the macro calls issued from the channel 2, and sends commands other than this macro call as they are to the input/output control device 4 via the interface circuits 11 and 12, and performs processing in response to the commands. The response information from the input/output control device 4 is directly transmitted to the channel 2 via the interface circuits 12 and 11, but in response to a macro call, the response information is taken in and processing begins at step j;8.

For example, a case will be described in which the input/output device 5 is a disk device, and the table of contents information of the disk is successively output, and the record indicated by the Nth address in the disk recorded in the table of contents is read out.

Assuming that the macro command name in this case is A, its contents are as follows: (1) Select the input/output device indicated by parameter a1.

■Position the head at the beginning of the table of contents information.

(parameter a2) - Skip the table of contents information.

■Read the table of contents information and use this table of contents information as the head address of the target record.

■Position the head on the target record.

■Read the record and transfer it to the host device.

After the central processing unit l sends out the macro call via channel 2, it sends out the macro command name A. Then, the number of the input/output device 5 is sent as the parameter a, and N is sent as the parameter a2.

When the processor 8 detects a macro call, the processor 8 reads the macro command A from the memory 12 according to the macro command master that is subsequently input, inserts the number of the input/output device 5 in the parameter a1 of (2) above, and sends it to the input/output control device 4. do.

The processor 14 of the input/output control device 4 interprets the input/output command (2) that is manually inputted via the interface circuit 13, and connects the input/output device 5 via the device adapter 15. When the input/output control device 4 reports completion of selection of the input/output device 5, the processor 8 selects the input/output control device 1
When the completion of head positioning is reported, N is inserted into the parameter a2 of (2) and the head is sent to the input/output control device 4. Then, when the head reaches the Nth table of contents information, it sends out ■ followed by ■, and when it reaches the target record, it sends out ■.

When the input/output device 5 reads the data of the target record, the processor 14 sends this data to the macro command processing device 7 via the device adapter 15 and the interface circuit 13.

Processor 8 passes through interface circuits 12 and 11,
This data is sent to channel 2, which transfers this data to main memory 3.

Reports on the operating status of the input/output control device 4 and input/output devices after executing each of the above commands (■ to ■) are absorbed by the macro command processing device 7 as described above. As an error, channel 2
Report to.

Next, as an example of good processing, a process will be described in which both input/output devices 5 and 6 are disk devices, and a record is copied from input/output device 5 to input/output device 6.

Generally, this process consists of preparing to read the target record, reading the target record into main memory, preparing to write to the copy destination I/O device, and writing from main memory to the copy destination I/O device. However, the intervention of main memory means the occurrence of redundant accesses to main memory.

In this embodiment, in order to prevent this redundant access, a macro command is defined and the macro command name is set to B.

The contents are as follows: [Phase] Position the head at the record indicated by parameter b2 of the input/output device indicated by parameter b1.

■Input/output indicated by parameter b3 Position the head at the record indicated by parameter b4 of AM.

■Read the record indicated by parameter b2 and transfer it to the memory 10.

■Write the data to be transferred from memory 10 to the record indicated by parameter b.

Then, the central processing unit 1 inputs the number of the input/output device 5 as parameter b via channel 2.
For example, N is specified as 2, the number of the input/output device 6 is specified as parameter b3, and M is specified as parameter b4, and the command is sent to the macro command processing device 7.

The processor 8 of the macro command processing device 7 sends [phase] followed by ■ to the input/output control device 4 via the interface circuit 12, and the processor 14 of the input/output control device 4 sends this input/output via the interface circuit 13. When the command is received, it instructs the input/output devices 5 and 6 via the device adapters 15 and 16, respectively, to position the -.rad.

When the processor 8 receives the head positioning completion report from the input/output device 5, it sends @, and when the input/output device 5 reads the target record and sends it through the device adapter 15, the processor 14 sends this data to the interface circuit 13. ．．
12, and the processor 8 temporarily stores this data in the memory 10.

Upon receiving a head positioning completion report from the input/output device 6, the processor 8 sends 0, reads data from the memory 10, sends it through the interface circuit 12-13, and the processor 14 sends this data to the device adapter 16. After that, the data is written to the designated record area of the input/output device 6.

” Procedure 1 is executed one by one for each step. Therefore,
Intervention of the main memory 3 can be made unnecessary.

〔Effect of the invention〕

As explained above, since the present invention does not require channel intervention when executing frequently used routine input/output command sequences, it is possible to shorten the connection time between channels and input/output devices, and reduce the input/output processing execution time. It is possible to reduce the amount of information transferred between the central processing unit and the input/output device, and to configure an efficient computer system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the principle of the present invention, FIG. 2 is a block diagram of a circuit showing an embodiment of the present invention, and FIG. 3 is a diagram explaining a conventional technique. In the figure, 1 is the central processing unit, 2 is the channel, 3 is the main memory, 4 is the input/output control device, 5.6 is the input/output device, 7 is the macro command processing device, 8.14 is the processor, and 9 is the control memory. , 10 is memory, 11.12.13 is interface circuit, 15.1 (i
is a device adapter.

Claims (1)

[Claims] In a computer system that executes input/output processing according to commands issued via a channel (2), when executing an input/output command sequence, the channel (2) and the input/output control device (4) A series of input/output commands and corresponding operating status reporting procedures performed during the process are defined as macro commands, and a memory (memory) that stores the macro commands and parameters necessary for executing the macro commands. 1
0) and the macro call sent by the central processing unit (1) to call the macro command, and the memory (1)
A processor (8) that reads specified macro commands and parameters from 0) and sends them to the input/output control device (4).
and a control memory (9) for instructing the operation of the processor (8), and the central processing unit (1) performs macro calling and designation of macro commands to be executed. , and parameters, the macro command processing device (7) executes the input/output command sequence with the input/output control device (4). ) is the channel (2)
A macro command processing device characterized in that it is combined with a macro command processing device.