JPH04149755A - Log system for exclusive control for peripheral controller - Google Patents

Abstract

PURPOSE:To easily decide the reason of the generation of the fault by logging a state when detecting the fault and logging the state at that time through a communication means against the other director. CONSTITUTION:Directors 4 and 4' are composed of microprocessors 5 and 5' performing the instruction against a host processor 1 and data transfer or controlling the write/read of data against a device 3, log memories 6 and 6' storing fault information edited by the microprocessors 5 and 5' at the time of fault generation, and communication means 7 and 7' to communicate between directors 4 and 4'. Thus, when the fault on the exclusive control is detected, the director detecting the fault is logged in a log memory and indicates the log against the other director through a communication means. Thus, the fault can be easily analyzed.

Description

[Detailed Description of the Invention] Industrial Application Field] The present invention relates to a logging method for exclusive control of peripheral control devices, and in particular, in a peripheral control device that performs exclusive control between N directors, when a failure related to exclusive control occurs. Regarding the logging method when

J Prior Art] In conventional peripheral control devices, when a fault related to exclusive control is detected, only the director that detected the fault logs the fault information. There are problems with control, etc.

[Problem to be solved by the invention]

In this conventional peripheral control device, when a fault related to exclusive control occurs, only the director that detected the fault logs the fault information, so when this type of fault occurs, information indicating the relationship with other directors is required. There was a point of view that failure analysis could not be easily done because of this.

[Means to solve the problem]

A logging method for exclusive control of a peripheral control device according to the present invention includes a log memory for logging failure information when a failure occurs in a peripheral control device that performs exclusive control between N directors;
and a communication means for communicating between the N directors, and when a fault related to exclusive control is detected, the -r event controller detects the fault and co-registers the fault information into the O memory. At the same time, the logging method for exclusive control of the peripheral control device of the present invention is characterized in that it also instructs other directors to [float] via the communication means. When a failure occurs, a shared memory is provided for temporarily storing information indicating the status of the Atf. It is characterized in that the director's status information is read out, edited, and logged in the logger memory written in mj.

〔Example〕

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

FIG. 1 is a block diagram showing one embodiment of the present invention. In FIG. 1, one embodiment of the present invention shows a host processor 1.
and a peripheral control device connected to the device 3 that records a plurality of files, a child director 4.4' that controls data writing and reading from the device 3 according to commands from the host processor 1, and a director 4. exclusive i
1J, consists of a shared memory 8 that temporarily stores status information of the director 4' when a fault related to 'i' is detected.

The directors 4 and 4' include a microprocessor 5 that controls the transfer of instructions and data to the host processor 1, and the writing and reading of data to and from the device 3.
, 5', and the microflossers 5, 5 when a failure occurs.
Log memory for storing fault information edited by '6.
6', and communication means 7, 7' for communicating between the director 4 and the director 4'. The director 1 receives the command issued from the host processor 1 via the 4W number 45j 100 f, and if the command is sent to the device 3, the director 1 receives the command issued from the host processor 1 via the signal line 100. Write ~ data '[
1(Y') 7' /, ・Isu3L7) 1. l O via (, f7'-'--
To harm someone. In addition, if the command received from the master processor +1 is 1; - the command, the data is read from the device 3 via the signal line 110. ``Transfer the child to the second education-1''.

-7" and 7.94' receive the command issued from the post-frosé '++'1 via the signal line 101,
Te...(7', 3+mq-, i write command. If the command received from 1) is a read command, the signal line 111 is sent from device 3 to the area designated by 1). It reads data through the signal line 101 and transfers the data to the post processor 101.

Here, y high speed 3 no Ftlt! 2:alJ? IiZ
-) I"Ia [], fj #ru. Director 4
・1' is device 317. ): Use the QD squall function to perform exclusive 1t control 5, child stone ivy 4 or signal 5
If the device 3 is connected through the wire 110 to the 1st state (!!!), it will be connected from the 4' to the 111th tar 1-
When accessing the child HSS 3, the device 3 reports from the child director 4 to the director 4' via the occupied signal line 111. When director 4' recognizes that device 3 is being held by device 1, it waits for a certain period of time until device 3 is released, and then device 3 is released f+7I. and device 4
' writes, reads, and takes device 3 into an occupied state (L''c-tota), and when the processing is completed, puts device 3 into a released state.

Next, the processing of the director 4' when the director 4' detects a failure in which the device 3 is not released even after waiting for a certain period of time will be described. microprocessor 5
' collects failure information regarding director 4',
The status of the director 4 displayed on the communication means 7' via the signal line 140 is transmitted to the communication means 7' via the signal line 131.
Read from and examine.

First, if the microprocessor 5 of the director 4 is in an inoperable state, the microprocessor 5'
After adding the information that occurred due to the failure of the director 4 to the failure information regarding the director 4' and logging it to the log memory 6' via 121,
report that the disorder was induced due to a disorder in the

Next, using the communication means 7, 7', the microprocessor 5
, 5' will be explained below. The microprocessor 5' uses the communication means 7, 7' connected via the signal line 140 to issue a log collection instruction to the microprocessor 5.

Upon receiving the log collection instruction, the microprocessor 5 collects information indicating the operating state of the director 4 and logs it into the log memory 6 via the signal line 120, and then transfers the information to the signal line 1.
50 to the shared memory 8 and response to the microprocessor 5'. When the microprocessor 5' receives a communication response from the microprocessor 5, the microprocessor 5' reads out the information indicating the operating state of the director 4 stored in the shared memory via the signal line 151, edits it together with the fault information regarding the director 4', and sends the information to the signal line 121. Log memory through 6
After logging to ', it reports to the host processor l that a failure has occurred and that the logging is normal. In this case, the fault information logged in the log memory 6' of the director 4' may be read and analyzed via the host processor 1.

Further, when the microprocessor 5 detects that the shared memory 8 cannot be used due to a failure, it collects information indicating the operating state of the director 4, logs it in the log memory 6 via the signal line 120, and then sends the information to the communication means 7. , 7', the detection of a fault in the shared memory 8 is reported to the microprocessor 5'. When the microprocessor 5' receives a report from the microprocessor 5 that a fault has been detected in the shared memory 8, it reports to the host processor 1 that the log has been completed while the log is incomplete. Also, microflosser 5'
Even if a failure in the shared memory 8 is detected when reading information indicating the operating status of the director 4 stored in the shared memory 8, the host processor 1 is notified that the log has ended with incomplete logs. . In this case,
The fault information logged in the log memory 6' of the director 4' and the information indicating the operating state logged in the log memory 4 of the director 4 may be read and analyzed via the host processor 1.

〔Effect of the invention〕

As explained above, the present invention allows the director that detects a fault related to exclusive control to log the state at the time of detecting the fault, and then causes the other director to log the state at that time via communication means. By reading and analyzing the information logged in both directors, it is possible to easily determine why a failure has occurred.

Further, the present invention has a shared memory, and a director that detects a fault related to exclusive control has the other director write the current state to the shared memory via a communication means to detect the fault and information. By editing and logging the information based on the current state, and reading and analyzing the information logged only from the director that detected the failure, it is possible to easily determine why the failure occurred.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1...Host processor, 2...Peripheral control device,
3...device, 4,4'...director,
5゜5'...Microprocessor, 6.6'...
...Log memory, 7,7'...Communication means, 8
...shared memory, 100.101,110,
111,120゜121.130,131,140,1
50,151...Signal line. Agent Patent Attorney Susumu Uchihara

Claims (1)

[Claims] 1. In a peripheral control device that performs exclusive control between N directors, a log memory for logging failure information when a failure occurs, and communication for communicating between the N directors. and when a fault related to exclusive control is detected, the director that detected the fault logs the fault information in the log memory and instructs other directors to log the fault information via the communication means. A logging method for exclusive control of a peripheral control device. 2. If a fault related to exclusive control occurs, the director has a shared memory for temporarily storing information indicating the state of the other director, and the director that detects the fault can retrieve the fault information and the above information stored in the shared memory. A logging method for exclusive control of a peripheral control device, characterized in that status information of other directors is read out, edited, and logged in the log memory.