JPS5953941A - Information processing device - Google Patents

Abstract

PURPOSE:To minimize te influence exerted on performance, and to raise reliability and a maintenance property of a device, by providing a means for inhibiting or releasing the generation of an error report signal, and discriminating whether a correctable error is a fixed fault or a temporary fault. CONSTITUTION:In case when a correctable error is detected by an error detecting and correcting circuit 2, ''1'' is added to contents of an error generation frequency storing circuit 5 by a detecting signal 34 for reporting said detection. Subsequently, a value 36 of correctable error generation frequency of the circuit 5 is compared with an initial set value 38 of an error threshold circuit 6 by a comparing circuit 7. When they coincide with each other, an error report is inhibited by an error report controlling circuit 9. Subsequently, a time monitoring signal 41 is outputted to a time monitoring circuit 8 from the circuit 9, its initial set value 43 is subtracted by ''1'' each in accordance with the signal 41, and when its value is reduced to ''0'', a monitoring end signal 40 is generated and is inputted to the circuit 9. The circuit 9 refers to the value 36, and releases the inhibition of the error report if a value of correctable error generation frequency in the course of the time monitoring is ''0''.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to an upper processing device, and particularly to an information processing device having an automatic error correction function for data read from a control storage device.

[Prior art]

In an information processing device that uses a stored program method, a predetermined process is executed by repeating a series of operations: reading an instruction, decoding the instruction, and executing the decoded instruction1. It can be performed by combining dozens of basic operations, such as transferring information between registers, shifting beforehand, and using adders.

Instructions specifying such basic operations are called microinstructions, and an information processing device using a microprogram control system is one that executes each instruction by combining these instructions.

Since microinstructions are related to the control of an information processing device, when reading microinstructions from a control storage device, conventional error correction technology with functions of υ1-bit error detection and correction and 2-bit error detection has been used. Adopted,
Widely used. Therefore, during normal operation
, when a correctable error is detected, it is configured so that it can be corrected and the υ operation can be continued using the corrected data.

Conventionally, in this type of information processing apparatus, when a correctable error is detected and corrected once or several times, an error report signal is generated at that point, and the control record in which the error occurred is
Error log information regarding the corresponding address and bit position of the error log is collected, and the generation of the error report signal is subsequently suppressed.

If the failure when the error report signal occurs is a fixed failure,
The method of suppressing the generation of error report signals from now on is effective in preventing performance deterioration due to collecting unnecessary error log information, but if the failure is temporary, no valid error log information will be available from now on. There was a drawback that it could not be taken.

[Object of the Invention] The object of the present invention is to prevent the occurrence of an error (*) after the error report signal is generated, and to prevent the error from occurring if the error is corrected within a predetermined period of time. The above runner-up problem is solved by distinguishing between a temporary failure and a fixed error, which can be corrected by providing a means to divide the suppression of report signal generation, and 1li1.!: n-1 If the correctable error in the microinstruction read from the neck device is [151-11], from now on, only the error correction will be performed, and unnecessary error log information will be stopped to minimize the impact on performance. Therefore, it is an object of the present invention to provide an information processing apparatus having higher reliability and maintainability, which continues collecting error log information even if the error is a temporary failure.

[Configuration of the Invention J The present invention stores a microprogram in a control storage device.
□In an information processing device that performs data processing by sequentially reading out microprograms, there is provided a means for detecting errors in microinstruction data read out when reading out microinstructions from the control storage device, and a means for detecting errors that can be corrected. means for correcting the data if an error occurs; means for comparing the error correction speed with a preset value and generating an error report signal if they match; means for suppressing generation of an error report signal; and means for generating an error report signal if a new error is corrected within a preset certain period of time, and suppressing generation of the error report signal after that (decrease); and new/ζ
and means for canceling the suppression of the error notification signal generation if there is no side pressure of an error. Kasumi] Saharu.

[Examples of examples]

Next, the present invention will be explained in detail in Section 1 after referring to page 1.
"do.

The first σ1 is a block diagram of an embodiment of the present invention, where 1 is a microprogram N11 storing control memory +AV, +device,
2 is control I memory ↓l', 1 source data 3 from 9th sentence 1
0 error detection and automatic correction, and 3 is an error detection signal 3 capable of correcting the read data 30 and the data 32 corrected by the correction circuit 2 when an error occurs.
A switching circuit 4 is controlled by the microinstruction obtained from the output 33 of the switching circuit 3, and is connected to an operation section (the operation section 4 that performs the main calculations and control of the entire device, etc.). 6 is an error threshold circuit that can be initialized by a value 37 given by an external diagnostic program or the like; 5 is an error threshold circuit that can be initialized by a value 37 given by an external diagnostic program, etc. An error occurrence count memory circuit 7 whose contents are incremented by 1 compares the output 38 from the error threshold circuit 6 and the output 36 from the error occurrence count memory circuit 5, and if they match, generates a match signal 39. A comparison circuit 9 generates an error report signal 42 based on the coincidence signal 39 and an error report control circuit that suppresses generation of the error report signal 42 thereafter; 8 initializes with a value 43 given by an external diagnostic program or the like; This is a time monitoring circuit that can Further, 41 is a time monitoring instruction signal from the error report control circuit 9 to instruct the time monitoring circuit 8 to start, 40 is a time monitoring end signal from the time monitoring circuit 8 to report the end of time monitoring to the error report control circuit 9, and 35 is a time monitoring instruction signal for instructing the time monitoring circuit 8 to start. When the time monitoring circuit 8 is instructed to start time monitoring by the time monitoring instruction signal 41, it is a counter reset signal that instructs to reset the contents of the error occurrence count storage circuit 5. 1. During normal operation of this device Microinstruction data 30 read from control storage device 1 according to address 31 is used to control arithmetic unit 4 via switching circuit 3.

Whether or not there is an error in the read data 30 is determined by the error detection and correction circuit 2, and if a correctable error is detected, a detection signal 34 that reports it is used to detect the error during error correction. Uncorrected data 30
Control is performed so that the arithmetic unit 4 does not operate, and after the error correction is completed, the operation is continued normally using the corrected data 33.

The correctable error detection signal 34 is also used as a count up signal for the error occurrence number storage circuit 50, and when the correctable error detection signal 34 is generated, 1 is added to the contents of the error occurrence number storage circuit 5.

The error threshold circuit 6 is initially set to a value 37 given in advance, and when this initial setting value 38 and the value 36 of the number of correctable error occurrences are compared by the comparator circuit 7 and match, the comparator circuit 7 A match signal 39 is generated. When the coincidence signal 39 is generated, the error report control circuit 9 generates an error report signal 42 as the error report continues to be suppressed, suppressing subsequent error judgments, and using the time monitoring instruction signal 41, Time IH1
If the time monitoring circuit 8 is instructed to monitor the time and error reporting is already suppressed, even if the coincidence signal 39 is generated, the error report signal 42 is suppressed from being generated and no time monitoring instruction is issued.

The time monitoring circuit 8 is initially set to a predetermined value 43, and resets the contents of the error occurrence count storage circuit 5 when a time monitoring instruction is given according to the time monitoring instruction signal 41. A counter reset signal 35 is generated to instruct the counter reset signal 35, and thereafter, the value of the time monitoring circuit 8 is subtracted by 1 at fixed time intervals. When the value of the time monitoring circuit 8 reaches 0, a time monitoring end signal 40 is generated and the time monitoring circuit 8 is again set to the predetermined value 43.

When the time monitoring end signal 40 is input, the error report control circuit 9 refers to the value 36 of the number of correctable error occurrences, and if the value of the number of correctable error occurrences during time monitoring is O, suppresses error reporting. If the value of the correctable error occurrence count is 0, an error report signal 42 is generated, and thereafter, the generation of the error report signal 42 is suppressed again, and the time monitoring circuit 8 is notified of the time by the time monitoring instruction signal 41. Monitoring instructions are given.

By adopting the above configuration, when a correctable error is reported, the device of this embodiment performs time monitoring to ensure that a correctable error occurs within a preset time. Otherwise, it will be treated as a temporary failure and will be distinguished from a fixed failure.If it is a permanent failure, it will be possible to correct it.The generation of error correction signals will be suppressed and unnecessary error logs will be saved. By preventing performance borrowing by collecting information, and in case of temporary failures, we can continue to collect error log information necessary for preventive maintenance, thereby achieving highly maintainable and reliable equipment. be able to.

〔Effect of the invention〕

As explained above, the present invention has the following features: After the occurrence of a correctable error report signal, the generation of the error report signal is suppressed and time monitoring is performed. By configuring the system so that fixed failures and temporary failures can be clearly distinguished depending on whether they are reported or not, it is possible to realize a device with higher maintainability and reliability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention.

Claims (1)

[Claims] Loading a microprogram into a control storage device. In an information processing device that sequentially reads the microprograms and performs data processing, the pre-B pin control includes means for detecting an error in the microinstruction data read when reading the microinstruction from the storage device; means for correcting the data if the error is correctable; means for comparing the number of corrections of the error with a preset value and generating an error report signal if they match; means for suppressing generation of the error report signal; and means for generating an error report signal if a new error is corrected within a preset certain period of time and thereafter suppressing generation of the error report signal; , means for canceling the suppression of generation of the error report signal if no new error is corrected.