JPH03103959A - Dynamic input/output constitution change system - Google Patents

Abstract

PURPOSE:To dynamically change the constitution of I/O only by temporarily stopping the operation of an I/O element by allowing hardware to decode a change command and to change I/O data when a program commands the change of I/O control data during its execution. CONSTITUTION:An I/O control part 12 for controlling I/O operation between a main storage device 3 and an I/O element 4, receiving commands from the program and the I/O element 4 and controlling the execution of I/O operation corresponding to these commands is connected, and when the change of I/O control data is commanded during the execution, the hardware decodes the change command to change the I/O control data. Consequently, the I/O constitution can be dynamically changed by inhibiting the stop of I/O elements other than the I/O element to be changed or temporarily stopping only by the I/O elements to be influenced by the I/O device to be changed.

Description

[Detailed Description of the Invention] [Summary] Regarding a dynamic input/output configuration change method that dynamically changes the input/output configuration in a computer system, the input/output configuration can be changed without stopping the computer system. The purpose is to control input/output operations between main memory and input/output elements, and
An input/output control unit is provided that receives commands from the program and commands from input/output elements, and controls execution of input/output operations according to the commands, and changes input/output control data from the program while the input/output control unit is operating. When receiving a change instruction from the input/output control data change instruction means, the hardware decodes the input/output control data change instruction from the program and changes the specified input/output control data. Configure to perform change processing.

[Industrial Field of Application] The present invention relates to a dynamic input/output structure change method for dynamically changing the input/output structure in a computer system.

1. Prior Art FIG. 5 is a conceptual diagram of the configuration of a conventional computer system. 1
is a computer connected to bus 2.

3 is a main memory device which is also connected to bus 2.

4 is a plurality of input/output elements (I/O) connected to the bus 2. In a system configured as described above, in order to change the input/output configuration, it is necessary to change the input/output control data within the subtraction machine 1.

[Problems to be Solved by the Invention] The input/output control data is first initialized when the input/output control unit (included in the computer 1) is reset. After that, the following changes to the input/output control data could not be made without resetting the input/output control unit and resetting the input/output control data.

■ Addition and deletion of control blocks for input/output elements 4 ■ Changes in the attributes of input/output elements described in the input/output control blocks ■ Changes in the description of connection relationships of input/output elements 4 In other words, input/output control using conventional technology The only way to control the input/output configuration without resetting the input/output control unit was to activate or deactivate each input/output element within the range of the input/output element configuration determined when the input/output control unit was reset. .

The present invention has been made in view of such problems, and an object of the present invention is to provide a dynamic input/output configuration change method that can change the input/output configuration without stopping the computer system. It is said that

Specifically, it is as follows.

■ Attribute change of input/output element: Change the attribute description in the control block corresponding to the input/output element whose attribute is to be changed and other parts of the related input/output control data.

■Adding input/output elements: Add and initialize the control block corresponding to the input/output element to be added. It also changes other parts of the related input/output control data.

■Deleting input/output elements: Release the control block corresponding to the input/output element to be deleted. Also, change other parts of the related input/output control data. Furthermore, the resources allocated to the corresponding input/output element are released.

■Change of connection relationship of input/output elements 2. Input/output control data 3. Change data related to the connection of input/output elements within the evening.

Also, add or delete control blocks if necessary.

[Means for Solving the Problems] FIG. 1 is a flowchart showing the principle of the system of the present invention. The present invention provides an input/output device that controls input/output operations between a main storage device and input/output elements, receives commands from a program and commands from input/output elements, and controls execution of input/output operations according to the commands. A control section is provided (step 1), and means is provided for instructing a change of input/output control data from a program while the input/output control section is operating (step 2), and a change instruction from the input/output control data change instruction means is provided. When receiving the input/output control data change instruction from the program, the hardware decodes the input/output control data change instruction (step 3) and executes the specified input/output control data change process (step 4). 4 There is.

[Operation] When a program instructs to change input/output control data during execution, the hardware decodes the change instruction and changes the input/output data. With this configuration, input/output elements other than those targeted for change will not be stopped, or only input/output elements affected by the change will be temporarily stopped (for example, input/output elements connected to the same path) The input/output configuration can be dynamically changed simply by changing the input/output elements (or input/output elements connected to the same input/output control device).

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a diagram showing an example of a hardware configuration for implementing the method of the present invention. Components that are the same as those in FIG. 5 are designated by the same reference numerals. In the figure, reference numeral 3 denotes a main storage device, which is composed of a program use area 3a, a hardware system area (HSA) 3b, and a program use area 3c. HSABb includes input/output control data 20.

10 is a system main control unit connected to the main storage device 3;
1 is a plurality of CPUs connected to the system main control unit 0
It is. These, system main control unit 10 and CPU
1-1, which corresponds to computer 1 in FIG.

12 controls input/output operations between the main storage device 3 and the input/output element 4, and also receives commands from the program and the input/output element 4.
This is an input/output control unit that receives commands from the controller and controls execution of input/output operations according to the commands. The input/output control section 12 is
It consists of an input/output overall control section] 2a and input/output control data 12b. The input/output control data 12b is read from the input/output control data 20 in the main storage device 3.

13 is a plurality of channels connected to the input/output control section 12, and 14 is a control unit connected to these channels 1-3. A plurality of control units 14 are provided depending on the number of channels 13. And these control units 1
・] 4 is connected to a plurality of input/output elements 4. Here, the conditions that the computer used in the present invention must satisfy are as follows.

(2) Having an input/output control unit 12 that controls input/output operations (specifically, data transfer) between the main storage device 3 or extended storage device and other input/output elements 4;

(2) The input/output control unit 12 receives commands from the program and commands from the input/output element 4, and controls execution of input/output operations according to the commands. The input/output control section 12 automatically executes a low-level input/output block 1/col.

■The input/output control unit 12 is held in hardware (
Control input/output according to input/output control data (which cannot be accessed by normal commands from software). The input/output control data is a control block for each input/output element 4 (consisting of data indicating the attributes, status, etc. of the input/output element 4). It consists of stipulations of connection relationships between input/output elements 4, etc. The input/output control data is configured to reflect the configuration (input/output configuration) of the input/output element 4 connected to the input/output control unit 12.

- By simply setting input/output control data that reflects each input/output element configuration, the same input/output control unit 12 can control different input/output element configurations.

■Provide means for instructing the program to change input/output control data while the input/output control unit 12 is operating (that is, while the t-Fware is operating, which indicates that the program is running).Hardware decodes this command and changes the input/output control data while the input/output control unit 12 is operating.During the execution of the input/output operation, if necessary, after stopping the input/output operation for a specific input/output element 4, , by changing the input/output control data and changing the actual input/output structure according to instructions from the program, the input/output operation can be stopped or only partially stopped (i.e., without stopping the program, that is, the computer It is possible to change the input/output configuration (without stopping the business running on the system).

FIG. 3 is a diagram showing an example of the structure of input/output control data. In the figure, 30 is an input/output address 8 address connection element table in which addresses corresponding to each input/output element are stored as a table, and 31 is a control block corresponding to a specific control unit (for example, X), which is provided in plural numbers. .

Each control block 31 is provided with a plurality of input/output element control blocks 32. Overall input/output control section 12a
Inside, a plurality of control blocks are provided in order from the channel 0 control block. The present invention will be described below using a system configured as described above.

The case of adding an input/output element 4 will be explained as an example. The program in the main storage device 3 executes the expansion of the input/output elements 4 by commanding the hardware.

Here, the following data is specified in the operand of the instruction from the program.

■ Number of input/output element ■ Attribute of input/output element (for example, block 1, col, etc.) ■ Number of control unit 14 to which the input/output element belongs ■ Input/output address occupied by input/output element Hardware is a command (issued by the OS) and its operands, and change the input/output control data 20 as shown below.

9 10 ■ Securing the input/output element control block (see Figure 3) ■ Initializing the input/output element control block. In this case, initialization is performed according to specified attributes, etc. Further, the input/output element control block is initialized to an inactive state.

■Change the necessary parts in the control block of the control unit to which the added input/output element is connected, ie, the list of connected input/output elements, etc.

■Input/output address connection element table 30 (see Figure 3),
The input/output address portion occupied by the added input/output element 4 is changed so that the added input/output element 4 is connected to the corresponding input/output address.

The input/output control data 20 changed in this way is transferred to the input/output control unit 12 through the system control unit 10, and becomes input/output control data 12b.

The control unit 14 reads this input/output control data 12b via the channel 13 and changes the input/output configuration of the corresponding input/output element 4. The control unit 14 then actually installs the input/output elements 4, connects them to the already operational control unit, and changes the actual input/output configuration. The program activates the added input/output element 4 (this can be done using conventional instructions) and starts the input/output operation of the added input/output element.

FIG. 4 is a flowchart of dynamic input/output element modification according to the present invention. First, it is checked whether the change in the input/output element configuration to be executed can be performed without stopping input/output operations for any input/output elements (S1). Specifically, it is checked whether any other input/output element is connected to the path of the target input/output element. If not connected, there is no need to stop input/output operations for any input/output element. If even one element is connected, the operation of only the connected input/output element is temporarily stopped.

If there is no need to stop the input/output operation of any input/output element, the program instructs the hardware to change the input/output control data. The hardware interprets the command and changes the input/output control data (S2). Next, the configuration of the actual input/output elements is changed by 11 (S3). Then, if necessary, some input/output elements 4 are activated (validated) (S4).

If it is necessary to stop the operation of some input/output elements in step S1, the program stops the operation of the specific input/output element within the necessary range (S5).

The program then instructs to change the input/output control data 20. The hardware interprets this command and changes the input/output control data 20 (S6). Next, the actual configuration of input/output elements is changed (S7). If necessary, some input/output elements 4 are activated (S8). Finally, the stoppage of the input/output operation is canceled (S9).

[Effects of the Invention] As explained in detail above, according to the present invention, when a program instructs to change input/output control data during execution, the hardware decodes the change instruction and changes the input/output data. By using this configuration, it is possible to dynamically change the input/output configuration by simply temporarily stopping the operation of only the input/output elements that are connected to the same path as the input/output element that is the subject of change. can.

[Brief explanation of drawings]

Fig. 1 is a flowchart showing the principle of the method of the present invention, Fig. 2 is a diagram showing an example of a hardware configuration for implementing the method of the present invention, Fig. 3 is a diagram showing an example of the structure of input/output control data, and Fig. 4 is a diagram showing an example of the structure of input/output control data. is a flowchart of dynamic input/output element change according to the present invention, and FIG. 5 is a conceptual diagram of the configuration of a conventional computer system. In FIG. 2, 3 is the main storage device, 3a and 3c are program use areas, 3b is input/output control data, 4 is an input/output element, 10 is a system control unit, 11 is a CPU, 12 is an input/output control unit, 1 3 14 1. 2a is an overall input/output control section, 12b is input/output control data, ]3 is a channel, and 14 is a control unit.

Claims (1)

[Scope of Claims] Controls input/output operations between the main storage device and input/output elements, receives commands from the program and commands from the input/output elements, and controls execution of input/output operations in accordance with the commands. An input/output control unit is provided (step 1), a means for instructing a change of input/output control data from a program while the input/output control unit is in operation is provided (step 2), and a means for instructing a change of the input/output control data is provided. Upon receiving the instruction, the hardware decodes the input/output control data change instruction from the program (step 3), and executes the specified input/output control data change process (step 4). A dynamic input/output configuration change method.