JPS6315343A - Damping circuit for log data - Google Patents

Abstract

PURPOSE:To improve damping speed, by constituting a device so that a log data read from a memory part is outputted selectively by every classified log data. CONSTITUTION:A setting part 1 which sets the classification of the log data to be outputted, a collating part 2 which collates the classification of the log data read from the memory part, with a set classification, and an output control part 3 which selects and outputs a read log data corresponding to a collated result, are provided in the titled circuit. In the log data, the classification of a hardware in which a fault is generated, a microinstruction executed at the time of generating the fault, the content of each register of each part at that time, and the contents of a retry operation and other processings, are recorded in a prescribed form, but, out of those contents, for example, the classification of the hard ware, the microinstruction, and the fault, etc., written at the head of other information in a form of header record. Therefore, it is possible to damp preferentially a specific log data by utilizing the above items as retrieval keys.

Description

[Detailed Description of the Invention] [Summary] By configuring the log data read from the storage unit to be selectively output for each type of log data,
This is intended to improve dump speed.

[Industrial application field]

The present invention relates to a log data dump circuit.

Generally, in computer systems, a history of past failures (referred to as log data) is recorded in a storage unit, including failures that could be recovered by retrying, etc., and failures that could be dealt with by redundant circuits, etc., and can be updated as needed. This data is dumped onto a floppy disk, etc., and used to investigate the cause of the failure.

At this time, it is desirable that the desired log data be dumped quickly.

[Problems to be Solved by the Prior Art and the Invention] In the conventional log data dump circuit, the stored log data is dumped as is onto a floppy disk or the like.

However, the log data is recorded in the chronological order of occurrence. Therefore, even if you only want log data related to specific hardware,
Since it is necessary to dump all data, there is a problem in that it takes a very long time.

That is, two objects of the present invention are to provide a log data dump circuit that can quickly obtain desired data.

Means for Solving Problem c] The log data dump circuit according to the present invention is as shown in the principle diagram of FIG.

a setting unit 1 for setting the type of log data to be output;

a collation unit 2 that collates the type of log data read from the storage unit and the set type;

The component includes an output control section 3 that selects and outputs the read log data according to the verification result.

[Effect]

The log data includes the type and type of hardware where the failure occurred.
The microinstructions that were being executed at the time of the failure, the contents of the registers of each part at that time, and the details of retries and other actions are recorded in a predetermined data format. The type of failure, etc. is written at the beginning of other information in the form of a header record.

Therefore, by using these as search keys, specific log data can be dumped preferentially.

〔Example〕

FIG. 2 is a configuration diagram of the present invention-embodiment, and the setting section 1 includes:
A first register 11 for setting the type of hardware such as a central processing unit, various input/output devices, and a common bus using a predetermined code. It consists of a register 12° for setting the type of microinstruction using a predetermined code, and a register 13 for setting the type of failure using a predetermined code.

The collation unit 2 includes a fourth register 21.2 that stores one log data read from an internal memory (not shown). A first collation unit 22 that collates the setting contents of the first register 11 with the header code representing the type of hardware in the log data stored in the fourth register 21. A second collation unit 23 that collates the setting contents of the second register 12 with a header code representing the type of microinstruction in the log data stored in the fourth register 21. third register 13
A third collation unit 24. that collates the setting contents with the header code representing the type of failure in the log data stored in the fourth register 21. and a first matching section 22 and a second matching section 23. and an AND circuit 25 that outputs the logical product of the outputs of the third matching section 24.

Further, 3' is a gate serving as an output control section.

When the output of the AND circuit 25 is "1", that is, only the log data whose hardware type, microinstruction type, and failure type are the same as those set in the setting section 1 is processed.
Select and take out from gate 3'.

Data can be written to a Fronbi disk (not shown).

〔Effect of the invention〕

As explained above, in the log data dump circuit according to the present invention, desired log data can be selectively dumped, so that effects such as improved dump speed and avoidance of dump data overflow can be obtained.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention. FIG. 2 shows a configuration diagram of the embodiment. In these figures. 1 is the setting section, 2 is the verification section.

Claims (1)

[Claims] A setting section (1) for setting the type of log data to be output; a collation section (2) for comparing the type of log data read from the storage section with the set type; A log data dump circuit comprising: an output control unit (3) that selects and outputs the read log data according to the verification result.