JPS61115154A - Diagnosis processing system - Google Patents

Abstract

PURPOSE:To speed up and secure the troubleshooting by stopping the action of a normal system circuit at the time of required conditions, holding monitor information, responding it by the request of a central processing unit and re-writing it. CONSTITUTION:An I/O controller 4 receives a command transmitted from the central processing unit 1. When the command is a diagnosis one, a channel interface circuit analyzes it to introduce a parameter. When the received command instructs the start of a diagnosis system circuit 43, the interface circuit activates it. The diagnosis system circuit 43 retrieves the parameter of a main memory device 2 to find it to be a stop command and the normal system circuit 42 goes to the state specified by the stop command, said circuit 43 stops the normal system circuit. If it is not the stop command, a control is executed in conditions having the specified contents, and trace information is contained. Based on the contained record the central processing unit 1 makes diagnosis, and storage data is re-written. In an operation timing, the diagnosis processing of the central processing unit 1 can be checked, which displays an effect for troubleshooting of the central processing unit 1.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a diagnostic processing method, and in particular, a diagnostic processing method in which an input/output control device or an input/output device is provided with a diagnostic circuit, and diagnoses its own device while performing normal processing. This relates to a diagnostic processing method.

[Conventional technology]

A system consisting of a central processing unit, an input/output control unit, and an input/output device is configured as shown in FIG. That is, the central processing unit 1 is connected to a main storage device 2, and an input/output control device 4 and an input/output device group 5 are connected via a channel device 3.

Conventionally, a failure occurring in the input/output control device 4 or the input/output device group 5 is notified to the central processing unit 1 using sense bytes indicating status information of each device.

The central processing unit 1 analyzes the fault that has occurred based on this sense byte. Further, as a method for causing a pseudo fault to occur in the device, there is a method using a special command. For example, the command REQUEST-TRACK4N-ERROR in a magnetic tape controller.
It is.

There is the problem that the fault analysis using the sense byte described above is insufficient for fault analysis of input/output control equipment or input/output devices, and the problem that simply generating a pseudo fault as described above hinders troubleshooting. There is.

[Problem that the invention seeks to solve]

This invention provides a diagnostic processing method that can particularly appropriately perform failure analysis in view of the conventional situation as described above.
More specifically, it is a processing method for diagnosing faults that occur in input/output control devices or input/output devices during normal operation, and is intended to speed up and improve the accuracy of fault analysis.

Means for Solving Problem C] In order to solve the above problems, the present invention provides a diagnostic system circuit in the normal system circuit of the input/output control device or the input/output device, and performs diagnostics of the central processing unit. The diagnostic circuit is started and stopped by commands, the diagnostic circuit monitors the normal circuit, and when the required conditions are met, the normal circuit stops operating, maintains monitoring information, and controls the central processing unit. In addition to responding with monitoring information upon request, the monitoring information can be rewritten, allowing for appropriate analysis.

[Effect]

The diagnostic circuit described above stops the normal circuit when a predetermined failure occurs during normal operation of the human output control device or the input/output device, stores monitoring information, and displays the monitoring information. Accurate failure analysis is possible based on this.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram of a main part of an embodiment of the present invention, and FIG. 2 is a flowchart for explaining the present invention in detail.

The same numbers are used for the same parts throughout the figures. The input/output control device 4 includes a channel interface circuit 41, a normal system circuit 42, and a diagnostic system circuit 43.

The channel interface circuit 41 is provided with an analysis section 411, and this analysis section 411 is connected to the central processing unit 1.
Analyzes the diagnostic command sent from the channel device 3 via the channel device 3. The parameters resulting from the analysis are input to the diagnostic circuit 43. The diagnostic system circuit 43 reads the normal system circuit 4 from the main storage device 2 based on the sent parameters.
In addition to deriving the conditions for disconnecting No. 2, the normal system circuit is monitored.

The above-mentioned disconnection conditions also include the address at which the normal system is stopped. The stopping section 431 performs the separation, and the monitoring section 432 performs the monitoring. The trace information storage section 433 stores the process by which the monitoring section 432 monitors the normal circuit. Note that writing of this trace information can be changed by a write diagnosis command of the central processing unit 1, and this trace information can of course be read from the central processing unit 1.

The central processing unit 1 first operates the diagnostic system circuit 43 based on a command, and then operates the normal system circuit 42 to perform diagnostic processing.

The above operation will be explained using FIG. 2. The input/output control unit receives a command sent from the central processing unit, and if it is a diagnostic command, it is in the state (1) shown in Figure 2. From now on, the status in Figure 2 is indicated by a number in parentheses. ) The earl interface circuit analyzes this command and derives the parameters (2).If the command instructs to start the diagnostic circuit, it starts the diagnostic circuit (3).

The diagnostic circuit searches for parameters in the main memory (4)
, stop command (5), when the normal system circuit reaches the state instructed by the stop command (6), the normal system circuit is stopped (7). If it is not a stop command (5), management is performed under the specified conditions (8). The above trace information is stored. Corresponding processes are performed by the central processing unit's diagnosis end command, trace information read command, and trace information write command.

Although the above explanation has been made using an input/output control device, it goes without saying that the present invention can also be applied to an input/output device without any problems.

〔Effect of the invention〕

As can be understood from the above explanation, the present invention, in short, stops the normal circuit when it reaches a predetermined state, records the progress of the state up to the stop, and records the items to be managed. The management data for this item is determined in advance and recorded, and the central processing unit performs diagnosis based on this record, making it possible to perform sufficient fault diagnosis analysis during operation, as well as rewriting the recorded data. This allows you to check the diagnostic processing of the central processing unit at the operational timing.
Effective in diagnosing problems with central processing units.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a main part of an embodiment of the present invention, FIG. 2 is a flow chart for explaining the present invention in detail, and FIG. 3 is a system configuration diagram. In the figure, 1 is a central processing unit, 2 is a main storage device, 4 is an input/output control device, 5 is an input/output device group, 42 is a normal system circuit, and 43 is a diagnostic system circuit. Figure 1

Claims (1)

[Claims] In a central processing unit system comprising an input/output control device and an input/output device, a diagnostic system circuit is provided in the normal processing circuit of the input/output control device or the input/output device, and the diagnostic system is activated by a diagnostic command from the central processing unit. The diagnostic circuit monitors the normal processing circuit, and when a required condition is met, stops the normal processing circuit, maintains monitoring information, and controls the central processing unit. A diagnostic processing method characterized in that the monitoring information is responded to in response to a request, and the monitoring information can be rewritten.