JPS6325750A - Generating system for pseudo fault - Google Patents

Abstract

PURPOSE:To widen a range for evaluation of pseudo fault processing by generating a pseudo fault for designation of both physical and logical channels. CONSTITUTION:An extended decall instruction is carried out based on exceptional data on physical channels set to an input/output controller designating area 11a, a peripheral controller designating area 11b, a peripheral controller designating area 11c and a pseudo fault type-based designating area 11d of a pseudo fault information storing area 11. The pseudo fault information is buried into firmware in an IOP 4 by said decall instruction. Then control is shifted to an operating system OS (not shown here) and a channel command is executed for a data writing request given to a peripheral device 61 from another application job. Thus a physical channel exception is produced and informed to the OS by an exception processing mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pseudo failure generation method, and particularly to a pseudo failure generation method for an input/output control device used in an information processing system.

[Conventional technology]

Conventionally, in this type of IJJ (14 fault generation method), it was only possible to specify an input/output control device, but it was not possible to specify physical channels and logical channels to generate a pseudo fault.

[Problem that the invention seeks to solve]

In the above-mentioned conventional method for generating pseudo-failures for input/output control devices, it is not possible to generate pseudo-failures on a channel-by-channel basis, so the evaluation range of fault handling due to In+ faults is limited, and detailed evaluation is not possible. There is a drawback.

In view of the above-mentioned points, an object of the present invention is to
The objective is to provide two ways to generate IEF (Jl) failures that can cause failures.

[Means for solving problems]

The pseudo-failure generation method of the present invention includes a pseudo-failure information storage means that is provided on the main storage device and stores pseudo-failure information including designation information of a human output control '4'B device number, a physical channel number, and a logical channel number. , a simulated failure setting means for setting the simulated failure information stored in the simulated failure information storage means in a human output control device, the human output control device number, the physical channel number, and the information set by the simulated failure setting means; and pseudo-failure generating means for generating a pseudo-failure based on the pseudo-failure information set in the input/output control device when an input/output operation to a channel having the logical channel number is started.

[Effect]

In the pseudo fault generation method of the present invention, a pseudo fault information storage means is provided on the main storage device, stores pseudo fault information including designation information of a human output control device number, a physical channel number, and a logical channel number, and sets a pseudo fault. The means sets the pseudo fault information stored in the pseudo fault information storage means in the input/output control device, and the pseudo fault generating means sets the input/output control device number, physical channel number and logical channel number set by the pseudo fault setting means. A pseudo failure is generated based on pseudo failure information set in the input/output control device when an input/output operation to the channel is started.

〔Example〕

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

FIG. 1 is a configuration diagram showing an embodiment of the present invention. The pseudo failure generation method of this embodiment is based on the main memory (hereinafter referred to as MMU).
) I, the system control unit (hereinafter abbreviated as SCU) 2 connected to this MMUI, and this 5CU
an arithmetic processing unit (hereinafter abbreviated as EPU) 3 connected to CU 2; and an input/output control unit (hereinafter referred to as EPU) connected to 5CU2.
4, a peripheral control device (hereinafter abbreviated as PCU) 5 connected to the IOP 4, and a plurality of peripheral devices 61 to 6n connected to the PCU 5.

A pseudo failure information storage area 11 is provided on the MMUI, and the pseudo failure information storage area 11 further includes an input/output control device specification area 11a1 and a peripheral control device specification area 11b.
1 peripheral equipment summer designated area 11c and pseudo failure type designated area lid.

Referring to FIG. 2, the physical channel exception generation process in the pseudo fault generation method of this embodiment includes a pseudo fault information writing step 21, an extended decall instruction step 22,
It consists of a pseudo failure information setting step 23, a peripheral device access step 24, and a physical channel exception generation step 25.

Next, the operation of the pseudo failure generation method of this embodiment configured as described above will be explained.

Currently, IOP number is 0. Consider, for example, a case where access to a peripheral device 61 having physical channel number 1 and logical channel number 1 causes a physical channel exception.

A simulated failure program started as one job under an operating system (not shown, hereinafter abbreviated as ○S) stores a physical channel in the simulated failure type specification area 11d for the simulated failure information storage area 11. ○P number O1 physical channel number 1 and logical channel number l are written in the input/output control device specification area 11a, peripheral control device specification area 11b, and peripheral device specification area 11c, respectively (step 21 ).

Next, the extended decor is performed based on the physical channel exception data set in the input/output control device specification area 11a, peripheral control device specification area 11b, peripheral device specification area 11c, and pseudo failure type specification area lid of the pseudo failure information storage area 11. Execute the instruction (step 22).

Then, this extended decall instruction embeds pseudo failure information in the firmware in 10P4 (step 23). However, no physical channel exception occurs in this state.

After this, control is transferred to O8, and a chat command is executed by the access bus of IOP number O1 physical channel number l and logical channel number 1 in response to a data write request to peripheral bag ff61 from another application job. (Step 24), This causes a physical channel exception to occur for the first time (Step 25). The physical channel exception is notified to O8 by the exception handling mechanism.

In this way, a pseudo failure occurs when the O8 uses the peripheral Vi Z 61, so it is possible to realize a pseudo failure similar to when the O8 performs actual failure processing.

〔Effect of the invention〕

As described above, the present invention has the effect of widening the scope of failure processing evaluation due to pseudo faults by making it possible to generate pseudo faults that specify physical channels and logical channels.

Furthermore, by causing a pseudo failure to occur when a designated channel is used, it is possible to evaluate failure handling in a manner similar to actual system operation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a flowchart showing an example of processing in the pseudo failure generation method of this embodiment. In the figure,... Main memory unit (MMU), 2... System control unit (SCU), 3... Arithmetic processing unit (EPU), 4... Input/output control unit (IOP), 5. ...Peripheral control unit (PCU), 11...pseudo fault information storage area, 11a...input/output control device specification area, 11b...peripheral control device specification area, 11C...peripheral device specification area,

Claims (1)

[Scope of Claims] A pseudo-failure information storage means provided on a main storage device and storing pseudo-fault information including designation information of an input/output control device number, physical channel number, and logical channel number; and this pseudo-fault information storage means. a pseudo failure setting means for setting the pseudo failure information stored in the input/output control device in an input/output control device; and a channel having the input/output control device number, the physical channel number, and the logical channel number set by the pseudo failure setting means. A pseudo-failure generating method, comprising: pseudo-failure generating means for generating a pseudo-failure based on the pseudo-failure information set in the input/output control device when input/output operations to the input/output control device are started.