JPS61271553A - Attention processing system for information processing system - Google Patents

Abstract

PURPOSE:To enable a central processing unit to read attention data with out being aware of its peripheral devices by securing a system where an input/output controller stores an attention path and the peripheral device has a constitution table respectively. CONSTITUTION:When a peripheral device 30, for instance, needs to transfer the information to a central processing unit 10 via an attention path, an attention path selecting part 311 refers to a constitution table 301 to know that the attention paths of a device interface 50, an input/output controller 20 and a channel 40 are available. Then a request for generation of an attention interruption is fed to the controller 20. Thus the controller 20 stores the device number of the device 30 and the channel number of the channel 40 to an attention path storage part 201 in a paired form. Then an attention interruption is produced at the unit 10 by an attention path control part 211. The unit 10 produces the attention information out of the channel 40 having the attention interruption to obtain the attention information.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a plurality of central processing units and input/output control units.

The present invention relates to an attention processing method in an information processing system having a peripheral device and a peripheral device.

[Conventional technology]

Conventionally, this type of attention processing method is used when a peripheral device transfers information to the central processing unit.

A device number to identify the peripheral device that has the information was added to the special status for attention interrupts. The central processing unit analyzes the attached device number and issues a command to read attention information to the peripheral device to retrieve the necessary information. Furthermore, since it was not possible for the two peripheral devices to determine which central processing unit should be notified of these attention interrupts, all attention paths were used to issue the attention interrupts.

[Problem that the invention seeks to solve]

In the conventional attention processing method described above, peripheral devices having attention information are distinguished by device identification, so the central processing unit needs to be aware of the configuration of the peripheral devices below the input/output control device. In addition, if attention interrupts are issued using all nodes, multiple notifications will be sent to the same central processing unit, and even notifications to other central processing units will be sent, so the central processing unit will be able to check whether the information is really necessary or not. The method of using a fixedly determined attention path has the drawback that it is not easy to change the system configuration or select an alternative/J path in the event of a path failure.

[Means for solving problems]

The attention processing method of the present invention includes a plurality of central processing units having attention processing means for analyzing an attention interrupt, issuing an attention information read command from the same channel as the attention interrupt channel, and receiving attention information.

Attention/fourth storage means for storing which peripheral device issues an attention interrupt issuance request from a peripheral device to which central processing unit, and busy/release processing for attention interrupt issuance, attention no fourth, and attention processing. Refer to the configuration table showing the connection status of the central processing unit and the input/output control unit, and the configuration table that shows the connection status of the central processing unit and the input/output control unit, and the plurality of input/output control units that have an attention control means that transfers the information reading 9 command to the target peripheral device. The peripheral device has an attention path selection means for requesting an input/output control device to issue an attention interrupt to a target central processing unit, and for selecting another attention path when an attention path is busy/released.

〔Example〕

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

FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention, in which central processing units 10 and 11 each include attention processing units 101 and 102, and input/output control units 20 and 21.
are attention/-i's storage units 201.20, respectively.
2 and attention path control units 211 and 212,
They are respectively connected to the central processing unit 10 via channels 40.41e and to the central processing unit 11 via channels 42.43e. Peripheral devices 30 and 31 are configured in configuration table 3 respectively.
01.302 and attention path selection section 311°312
and an input/output control device 20 via a device interface 50.51e, respectively, and a device interface 52.5.
3 and is connected to the input/output control device 21 via.

Figure 2 shows the configuration table 301 and 302 shown in Figure 1.
FIG. 3 shows the entire contents of attention paths 1, 2, . . . shown in FIG. 2. . . . n, and FIG. 4 shows the contents of the attention path storage units 201 and 202 shown in FIG. 1. The operation will be explained below using a block diagram connected in this way.

In FIG. 1, 1, for example, a peripheral device 30 is a central processing unit 1.
When it becomes necessary to transfer information using attention to 0, the attention path selection unit 311 uses the configuration table 3
01, the device interface 50. Input/output control device 20. Knowing that it is sufficient to use the attention puff of channel 40, it requests the input/output control device 20 to generate an attention interrupt. Input/output control device 2 that received this
0 stores the device number of the second peripheral device 30 and the channel number of the channel 40 as one set in the attention/path storage unit 201, and causes the attention path control unit 211 to generate an attention interrupt to the central processing unit 10. At this time, if the attention/e space is already in use,
If a failure occurs and an interrupt cannot be generated, the peripheral device 30, which is the source of the request, is notified. The peripheral device 30 that has received the notification uses the device interface 52 to request the input/output control device 21 to generate an attention interrupt.

The central processing unit 10 receiving the attention interruption issues an attention information reading command from the channel 40 where the attention interruption occurred in order to obtain attention information. The attention path control unit 211 of the input/output control device 20, which received the attention information read 9 command, refers to the information stored in the attention path storage unit since the attention information read 9 command is from the channel 40.
Transfer to 0.

The peripheral device 30 that receives the instruction to read the attention information transfers the attention information to the input/output control device 20.

The input/output control device 20 that received the attention information transfers the attention information to the central processing unit 10, and
The attention path control unit 211 puts the attention paths of the peripheral device 30 and the channel 40 into an unused state from the attention path storage unit 201 and notifies the two peripheral devices 30 and 31 of the release of the attention/path.

Peripheral device 30 that received notification of the release of the attention path
．． 31 learns that it is now ready to issue an attention interrupt request using channel 40.

Next, detailed operations of the attention path selection units 311 and 312 shown in FIG. 1 will be explained using FIGS. 2 and 3. However, both are the same.

Only 311 will be explained below. When the attention path selection unit 311 needs to transfer attention information to the central processing unit 10, it traces the link field shown in FIG. Then, the user searches for the attention i4 whose attention path status shown in FIG. 3 is described as ready. In the configuration shown in FIG. 1, the device interface 50° input/output control device 20. Attention path of channel 40 and device interface 52. Input/output control device 21. Two attention paths for the channel 41 are described, and for convenience of explanation, it is assumed that the former is selected here. The attention path status of the selected attention path is set to busy, and a request is made to the input/output control device 20 in FIG. 1 to issue an attention interrupt using the input/output control device number and channel number that have been written. If the selected attention path due to an obstacle, pinot, etc. is successfully used, all other attention paths are selected (in the configuration shown in Fig. 1, the device interface 52, input/output control device 21,
channel 41).

Once the transfer of the attention information is completed, the input/output control device 20 will notify you that the attention path has been released.

By setting the Attention Pass status to Ready, it becomes free and can be reused as needed.

Next, using FIG. 4, the attention path control unit 211
211 and 212 will be explained in more detail. For example, when there is an attention interrupt generation request from the peripheral device 30 in FIG. 1 using channel 40, it looks at the channel n status corresponding to the channel number (if channel 40 is channel number 1, (a) If it is in use, describe that it is in use, and store the peripheral device number of the peripheral device 30 in FIG. 1, which is the source of the attention interrupt generation request, in the position of the peripheral device number in use. (b) If it is in use, it is notified that it is in use and the process ends. After issuing an interrupt, channel 4 in Figure 1
When an attention information read command is received from 0, the peripheral device number in use corresponding to the channel is obtained and the attention information read command is transferred thereto. When attention information is transferred from the peripheral device that transferred the attention information read command, the attention information is transferred using the channel corresponding to the peripheral device number in use, and the corresponding channel n status is cleared from being used. and notifies all peripheral devices that it has been released.

〔Effect of the invention〕

As explained above, the present invention employs a system in which the input/output control unit stores attention paths and two peripheral devices have configuration tables, so that the central processing unit can read attention data without being aware of the peripheral processing devices. Furthermore, since attention interrupts can be issued only to the target central processing unit, the load on attention processing is reduced. Furthermore, since the central processing unit does not need to be aware of the peripheral devices, the configuration of the peripheral devices can be freely configured, and the system configuration can be easily changed depending on the purpose.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the entire embodiment of the present invention;
FIG. 2 is a diagram showing the contents of the configuration table shown in FIG.
FIG. 3 is a diagram showing the contents of the attention path n shown in FIG. 2, and FIG. 4 is a diagram showing the contents of the attention path n shown in FIG. 1. Explanation of symbols: 10 and 11 are central processing units, 2o. 21 is an input/output control device, 30.31 is a peripheral device. 40.41, 42.43 are channels, 50,51°52
．． 53 is a device interface, 101 and 102 are attention processing units, 201 and 202 are attention storage units, 211 and 212 are attention path control units, and 301 and 302 are configuration tables. 311 and 312 respectively indicate attention path selection sections. Agent (7783) Patent Attorney Noriyasu Ikeda Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A plurality of central processing units, a plurality of input/output control devices channel-connected to the plurality of central processing units, and a plurality of peripheral devices connected to the plurality of input/output control devices via a device interface, In an information processing system in which attention information is transferred from the peripheral device to the central processing unit by an interrupt, the central processing unit analyzes the attention interrupt and issues an attention information read command from the same channel as the one where the attention interrupt occurred. and an attention processing means for receiving attention information from the peripheral device, and the input/output control unit stores an attention path memory for storing information from which peripheral device to which central processing unit an attention interrupt issuance request from the peripheral device has been issued. and an attention path control means for issuing an attention interrupt, busy/release processing of an attention path, and transferring an attention information reading command to the target peripheral device, and the peripheral device has an attention path control device that transmits an attention interrupt, an attention path busy/release process, and an attention information reading command to the target peripheral device, A configuration table indicating the connection status of the control device, and a request to issue an attention interrupt to the target central processing unit by referring to the configuration table, and a command to the input/output device or other processing when the attention path is busy/released. An attention processing method for an information processing system, comprising an attention path selection means for selecting an attention path.