JPS60229148A - Collection system for history information on input and output action - Google Patents

Abstract

PURPOSE:To attain a collection system for history information on an input/output action which can obtain the history information on the input/output action of a desired device at a desired time point, by providing a memory part of information on a collection subject device which stores the information on the collection control device and the collection chance information. CONSTITUTION:When an output start is indicated from a console 4, a collection information editing output task 5 is started to deliver the data on a collection information buffer 7 onto an MT, a DASD or an LP. A derail point processor 2' gives information to a memory 6 when it passes through a derail point SDP and turns on a derail point pass flag. A collector discrimination processor 3' checks whether a device which is going to perform an input/output action is equal to a collection subject device or not. If an affirmative answer is obtained from said check, a collection chance check processor 4' receives the control. While the control is returned to an SIO instruction of an input/ output program 2 when no affirmative answer is obtained. The processor 4' checks whether the collection chance is satisfied or not. If an affirmative answer is obtained, the control is shifted to the next collection processor 5'. While the control is sent back to the SIO instruction of the program 2 if no affirmative answer is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a method for collecting historical information on input/output operations, which enables collection of historical information on input/output operations by specifying all collection target devices and collection triggers. It is.

(2) Conventional technology and problems As a method for investigating the cause and repairing when troubles related to input/output device failures occur.

(a) A method of analysis using error logging information outputted to a direct access device or magnetic tape device by O8 every time an error is detected.

(b) Control Φ in channels and input/output control devices
A method of estimating and analyzing the contents of registers.

(c) A method of connecting all other hardware such as interface monitoring equipment, collecting all trace information, and analyzing based on that information.

etc. are known. However, these traditional methods.

(α) Error Φ Logging information is static information at the time of failure detection, so it may be insufficient for analysis.

In particular, in the case of a timeout failure such as no response, history information of previous input/output operations is often required (6) The channel logout function, which traces within the hardware and scans out when a failure occurs, is It is only equipped with.

A control device for each device is not provided.

(6) The contents of the control registers of channel devices and input/output control devices are destroyed due to intermittent failures, O8 reset operations, etc., and are generally difficult to collect.
Also, connecting other devices to collect such information requires additional costs for the hardware.

It has the following drawbacks.

(3) Purpose of the invention The present invention obviates the above-mentioned drawbacks.

Input/output operation history information of a desired device at a desired time f! The purpose is to provide a complete method for collecting historical information on input/output operations.

(4) Structure of the Invention and Next 1 The input/output operation history information collection method of the present invention is based on an input/output request issuing program in which a delay point is embedded, and a non-operation command is embedded in a predetermined position. An output control program, a collection target device information storage section in which collection target device information and collection trigger information are stored, a collection information buffer in which collected information is stored, and a collection information buffer in which collected information is stored; A startup initialization processing unit that changes all non-operation instructions to predetermined interrupt instructions, a delay point processing unit that detects passing of the delay point (1), and operates when the predetermined interrupt instruction is executed. The information collection mechanism includes a collection device discrimination process that refers to all of the collection target device information storage units and discriminates whether or not input/output operations are being performed on the designated collection target device. means, a collection trigger check processing means that refers to all of the collection target device information storage units and checks whether or not the current time is an information collection trigger; and an input/output operation is performed on the specified collection target device; The present invention is characterized in that it includes at least a collection processing means that collects all information related to input/output operations as a condition that the current moment is a designated collection trigger.

(5) Examples of the invention Hereinafter, the present invention will be explained with full reference to its aspects.

FIG. 1 is a diagram for explaining one embodiment of the present invention, and FIG. 2 is a diagram for explaining all details of output processing.

In FIG. 1, 1 is an input/output request issuing program, 2 is an input/output control program, 3 is a performance history information collection reception processing task, 4 is a console, 5 is a J[[il report editing output task, and 6 is a collection target device. The information storage section 7 indicates a buffer for collected information.

The reception processing task 3 includes an event distribution processing m1 activation start processing section, a collection target device information creation processing section, and a collection information editing output start processing section. The event distribution processing section is
The startup start processing section, which recognizes which processing is requested by the command from the console 4 and operates the corresponding processing section, performs startup start initial value setting processing when the start of startup is instructed. ■ Operate. This startup start initial value setting process (■) changes the NOP instruction immediately before the SIO instruction to the SvC instruction, and also changes the NOP instruction t embedded at a predetermined position in the routine that processes the input/output end interrupt EXI.
-Change to 5vc instruction. The collection target device information creation processing unit generates collection target device information and collection start and end trigger fft@ according to the data sent from the console 4.
are created and stored in the information storage device information storage i6. The collection target device can be specified by device type such as channel system e41 configuration, channel, input/output control device, input/output device, etc., and device address. The trigger for starting and ending the collection can be specified by the delay point SDP embedded in the input/output request issuing program 1, the number of times it passes, the job name, the task name, and the number of input/outputs to be collected. When the collected information editing output start processing unit is instructed to start outputting from the console 4, the collected information editing output task 5 is started. When the collected information editing output task 5 is started, the collected information editing output task 5 starts the data in the collected information buffer 7. Output on all MT, DASD or LP. When the delay point 5Dpi4 occurs, the delay e-point processing notifies the sound storage section 6,
The storage unit 6 turns on the delay point passing flag. When a predetermined SvC command is executed, the collection device discrimination process (2) determines whether the device performing input/output operations is the collection target device or not. If the result of the check is 5Yaa, control is passed to the next collection opportunity check process (2), and if No, control is returned to the SIO command of the input/output control program 2. The collection opportunity check process ■ checks whether the collection opportunity amount is met.
If Y-1, the control goes to the next collection process (2), and if No, the control returns to the SIO command of the input/output control program 2. One of the conditions for meeting the collection opportunity is that the delay point passing flag is on. In the collection process ■, CAW (channel address word), DAW
(device address word) and CCW (channel address word)
Command @) Collect all information, write the collected information to the collected information buffer 7, and transfer control to SIO issue processing.

The SIO issuing process (2) issues all SIO commands on behalf of the input/output control program 2, and passes control to the collection process (2). In the collection process (2), all CC (condition number code) and C3W (channel status word) are collected, written into the buffer 7 for all collection information, and control is returned to the command next to the SIO command of the input/output control program 2.

When the input/output end interrupt EXl occurs, a predetermined SvC instruction is executed. When this SVC command is executed, the collection device discrimination process (2) operates, and the collection device discrimination process (2) checks whether the device that performs the input/output operation is the device to be collected. Yes
In that case, control is passed to the collection timing check process■, and the No.
If so, control is returned to the next instruction of SvC of the input/output control program 2. The collection check process (2) refers to the collection target device information storage unit 6 and checks whether the collection trigger is satisfied. If Yes, control is passed to C8W collection processing 0; if bNo, control is returned to the next instruction of SvC of input/output control program 2. The collection process ■ collects cswt-, stores it in the collection information buffer 7, and sends it to SSB (
Check whether or not a sense fighting part-time job is being acquired. When the SSB is acquired, the control is passed to the SSB collection process 0, and when the SSB is not acquired, the control is returned to the next instruction of the SvC of the input/output control program 2. The SSB result processing (■) acquires the SSB and writes it to the collection information buffer 7.

Return to the next command of SvC of control total input/output control program 2. When the execution of the input/output control program 2 is completed, the input/output request issuing program 1 is executed again. Note that the processes marked ■ to ◎ are realized by a program.

FIG. 2 shows details of the output processing. 8 indicates a system space, and 9 indicates a shared space. The collected information described in FIG. 1 is stored in the Itomo system space 8,
After that, it is moved to the shared space 9. The shared space 9 is divided into a plurality of page areas, and the number of page areas can be changed.

It may be considered that the shared space 9 is the collected information buffer 7 in FIG.

Output processing is performed as follows.

■ Secure a page area in the shared space.

■ If full, check to see if the memory stack is pointed to. If Yes, perform the process ■, and if No.
If so, how about ■? conduct.

■ Obtain the oldest page area and perform the processing in ■.

■ Wait for the space to be freed, ■ Repeat the following processing tube.

■ If you can secure a page in the shared space, stack all collected information.

■ Check to see if the page has been completed. If Y#8, perform the process ``■'', and if No, perform the following process ``■''.

□ Check whether the memory stack is specified □ If No, perform the process □, and if Y-8, perform the following process 0 □ Make an output request. The output request is made by the collected information editing output task 5.

■ Get a page of output space. To print out, click [
[phase] processing is performed, and when outputting to a magnetic tape or the like, output (■) is performed.

[F] Issue EXCP macro. When outputting in print, a collection ID is assigned and output.

Q Issue a WRITE macro. A collection ID is also given when outputting to MT or DASD.

■ Shared space that has already been output? Release 0 Even when the memory stack is specified, the collected information in the shared space 9 can be output by instructions from the console 4. In this case, stack processing to the shared space 9 is suppressed after the output request is made.

(6) Effects of the Invention As is clear from the above explanation, according to the present invention, (a) The information is not static information such as error logs, but is dynamic information that traces the entire flow of input/output operations. , it is possible to investigate the cause of failure and improve the efficiency of repair.

(b) Applicable to either buses or devices. Friend, all devices can be identified and collected, and they can be processed concurrently, so collection can be made more efficient.

(c) Since the storage location can be selected according to the amount of information collected and processing speed, collection efficiency can be improved.

) No special hardware is required.

You can perform an ensemble of effects such as.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining one embodiment of the present invention, and FIG. 2 is a diagram for explaining details of output processing.01...I/O request issuing program, 2...I/O control program,
3...Historical information collection main task, 4...Console, 5...Collected information editing output task, 6...Collection target device information storage unit, 7...For collected information; Tsufa O patent Applicant: 1 person other than Fujitsu Limited Patent attorney: Yobu Kyotani

Claims (1)

[Claims] An input/output request issuing program in which a delay point is embedded, an input/output control program in which a non-operation instruction is embedded in a predetermined position, and a collection in which collection target device information and collection trigger information are stored. Target device information storage unit, buffer for collected information into which success information is stored. A startup start initial setting processing means that changes all non-operation commands of the input/output control program to predetermined interrupt commands when the start of information collection is instructed, and a delay point processing unit that detects that all of the delay points have been passed. , and an information gathering device 11 that operates when the above-mentioned predetermined interrupt instruction is executed! The information collection mechanism includes a collection device discriminator that refers to the collection target device information storage unit and determines whether an input/output operation is being performed on the designated collection target device; A collection trigger check processing means that refers to the target device information storage unit and checks whether or not the current time is an information collection trigger, and a collection unit that performs an input/output operation on a specified collection target device and that the current time is specified. As a condition for being a trigger, at least a collection processing means for collecting all information related to input/output operations must be provided.1t4
? A method for collecting historical information on input/output operations.