JP2690226B2 - End notification synchronization control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end notification synchronization control method, and more particularly to an end notification synchronization control method for an information processing system having a plurality of auxiliary storage devices.

[0002]

2. Description of the Related Art Generally, access to an auxiliary storage device is frequently used in an ordinary information processing system and is required to have high speed and high reliability.

2 and 3 are time charts of the conventional end notification system. FIG. 2 is a time chart when issuing a command to the two auxiliary storage devices. The command issuing means 7, the end notifying means 8, the end interrupt receiving means 9, and the auxiliary storage devices 5 and 6 are shown. Composed of. Hereinafter, the auxiliary storage devices 5 and 6 will be referred to as auxiliary storage devices # 0 and # 1, or simply # 0 and # 1 in addition to the above description.

When accessing the two auxiliary storage devices # 0 and # 1, first, an instruction is issued to one of the auxiliary storage devices, all the operations are completed, and the end notification is completed. Each auxiliary storage device must be independently accessed by issuing a command to the remaining auxiliary storage device to notify the end.

FIG. 3 shows an example of a time chart when a failure occurs in accessing the auxiliary storage device. FIG. 3 is a time chart when an instruction is issued to one auxiliary storage device 5 (that is, # 0) and a failure occurs. FIG. 3 is composed of an I / O command issuing means 7, an end notifying means 8, an end interrupt accepting means 9, and an auxiliary storage device 5. When an instruction is issued to the # 0 auxiliary storage device 5 and a failure occurs, it may be necessary to access the auxiliary storage device in order to retrieve the content of the failure from the auxiliary storage device. At this time, if the failure information is received before the end notification is sent to the upper module, the failure information is set in the output interface, and the end notification is not sent, a failure may occur in the upper module.

[0006]

According to the above-mentioned conventional access method, each auxiliary storage device is accessed independently and the processing of the next auxiliary storage device must be completed until the processing in one auxiliary storage device is completed. There is a drawback that you can not do. Further, even if a plurality of auxiliary storage devices can be operated at the same time, if the end notifications are not synchronized, a problem may occur.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks and to provide an end notification system which enables high-speed access by effectively utilizing the idle time of the auxiliary storage device and the CPU and does not cause any trouble. .

[0008]

A termination notification synchronous control system of the present invention includes a plurality of instruction issuing means for respectively issuing an instruction to a plurality of auxiliary storage devices, and a plurality of termination interrupts for accepting termination interrupts of a plurality of the instructions. An interrupt receiving means, a multiple end interrupt notification synchronizing means for synchronizing the end notifications of the plurality of instructions in the order of command issuance, and a plurality of end interrupt notifying means for notifying the end interrupts of the plurality of instructions. It is equipped with.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. A multiple instruction issuing means 1, a multiple end interrupt acceptance means 2, a multiple end interrupt notification synchronization means 3, and a multiple end. The interrupt notification means 4 and the auxiliary storage device 5 (that is, #
0) and an auxiliary storage device (that is, # 1).

FIG. 4 is a time chart when a command is issued to two auxiliary storage devices and a failure occurs in one auxiliary storage device according to this embodiment, and the end notification is synchronized. is there. The multi-instruction issuing means 1, the multi-end interrupt accepting means 2, the multi-end interrupt notification synchronizing means 3, the multi-end interrupt notifying means 4, the auxiliary storage device 5, and the auxiliary storage device 6 are included. It

FIG. 5 shows a multi-instruction issuing means 1, a multi-end interrupt accepting means 2, a multi-end interrupt notifying synchronization means 3 and a multi-end interrupt notifying means 4 for the end interrupts of two auxiliary storage devices. It is a flow chart at the time of synchronizing and notifying. Step 10
~ Explained in step 19.

The end notification synchronization control method of the present invention will be described with reference to FIGS. An example in which an instruction is issued to two auxiliary storage devices so that they operate simultaneously and an instruction issued to one ends abnormally by the end notification synchronization control method of the present invention, but the end notification is performed in synchronization Will be explained.

First, the plural instruction issuing means 1 issues an instruction to the auxiliary storage device 5 (step 10). Upon receiving the activation end interrupt from the auxiliary storage device 5, the multi-end interrupt reception unit 2 transfers control to the multi-end interrupt notification synchronization unit 3, and upon normal termination, the multi-end interrupt notification synchronization unit 3
Check whether you can notify the end (Step 1
3) Pass control to the multiple end interrupt notifying means 4.

The plural-end interrupt notifying means 4 notifies the plural-command issuing means 1 of the completion of the activation of the auxiliary storage device 5 (step 14), and if it is judged that there is no end interrupt notification (step 15). , Control is passed to the multiple instruction issuing means 1. The multiple instruction issuing means 1 is the auxiliary storage device # 1 6
To issue a command (step 10).

When the operation of the auxiliary storage device 6 is completed, the plural-end interrupt acceptance means 2 accepts the end interrupt (step 11). If the auxiliary storage device 6 is terminated abnormally,
The plural-end interrupt notification synchronizing means 3 tries to retrieve the abnormality information with respect to the auxiliary storage device # 1 6 (step 12). However, if the operation end interrupt of 5 which is the auxiliary storage device # 0 is entered, the abnormality information cannot be retrieved (step 17). Therefore, the abnormality information retrieval is pending (step 18). , And passes control to the multiple end interrupt acceptance means 2. The plural end interrupt reception means 2 receives the operation end interrupt of the auxiliary storage device 5 (step 1
1) The interrupt handling process is performed and the control is passed to the plural-end interrupt notification synchronization means 3.

The plural end interrupt notification synchronizing means 3 judges whether or not the operation end notification of the auxiliary storage device 5 may be sent (step 13). However, since the auxiliary storage device 6 is in the abnormal information take pending, the end notification is given. The end notification is put into a pending state without performing (step 16).

Then, again, the multiple-end interrupt notification synchronizing means 3 tries to receive the abnormal information in the auxiliary storage device 6, and if it can be received (step 17), the multiple-end interrupt notification means 4 is sent. When the control is passed and the multi-end interrupt notifying means 4 determines that the end notification is possible (step 13), the multi-end interrupt notifying means 4 gives end notification of the auxiliary storage device # 1 6 (step 14).

After that, the plural end interrupt notification synchronizing means 3
Control is passed to check whether there is any end notification pending (step 15). Since the end notification of the auxiliary storage device 5 is pending, control is passed to the multiple end interrupt notifying means 4 and the auxiliary storage is notified. The end notification of the device 5 is given (step 14).

[0020]

As described above, according to the present invention, by suspending the abnormal information retrieval and by suspending the termination notice, a plurality of auxiliary storage devices are simultaneously operated and at the same time, the termination notice is synchronized. Therefore, there is an effect that high-speed and highly reliable processing can be performed in a system having a large multiplicity.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a time chart of issuing a command to a plurality of auxiliary storage devices by a termination notification synchronous control method according to a conventional technique.

FIG. 3 is a time chart when a command is issued to one auxiliary storage device and an abnormality occurs.

FIG. 4 is a time chart when an abnormality occurs when an instruction is issued to a plurality of auxiliary storage devices according to the present embodiment.

FIG. 5 is a flow chart when the end interrupts of two auxiliary storage devices according to the present embodiment are notified in synchronization with each other.

[Explanation of symbols]

 1 Multiple instruction issuing means 2 Multiple end interrupt acceptance means 3 Multiple end interrupt notification synchronization means 4 Multiple end interrupt notification means 5.6 Auxiliary storage device

Claims (1)

(57) [Claims] 1. A plurality of instruction issuing means for respectively issuing an instruction to a plurality of auxiliary storage devices, a plurality of end interrupt acceptance means for accepting an end interrupt of the plurality of instructions, and an instruction for notifying the end of the plurality of instructions. A termination notification synchronization control method, comprising: a plurality of termination interrupt notification synchronization means for synchronizing in order of issuance; and a plurality of termination interrupt notification means for notifying termination interrupts of a plurality of the instructions.