KR0161126B1 - Apparatus and method for searching the signal line status on the system bus in the computer - Google Patents

Abstract

According to the present invention, in a computer system having a structure in which a plurality of processors are connected to a system bus, in searching for a state of signal lines on the system bus, a signal line required by a user after checking whether or not a failure occurs in the apparatus itself performing the search is performed. A device and method for retrieving a signal line state on a system bus embodied to retrieve a state of the present invention is provided. The apparatus according to the present invention is provided with a search memory and a system provided therein when a state search for a predetermined signal line is requested from a user. Write and read specific data in the predetermined area of each bus connection, compare the written data with the read data, check for the occurrence of a fault, perform a state search for the required signal line only in the normal case, and indicate that a fault has occurred. If so, do not perform a state search for the required signal line. It is configured to. Therefore, the accuracy of the status search results for signal lines on the system bus can be improved.

Description

Apparatus and method for retrieving signal line status on a system bus in a computer system

1 is a block diagram of a signal line state searching apparatus on a system bus in a conventional computer system.

2 is a detailed view of a signal line state searching apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

201: Processor 202: Message Display

203: search memory 204: system bus connection

The present invention relates to an apparatus and method for retrieving signal line states on a system bus in a computer system, and more particularly, to an apparatus and method for retrieving signal line states on a system bus capable of checking for abnormalities in a medium computer system having a multiprocessor structure. will be.

As shown in FIG. 1, n process boards 101, n memory boards 102, n input / output control boards 103, and n system control boards 104 are connected to the system bus 105. The medium computer system having the existing multiprocessor structure is provided with a signal line state retrieval device 112 for analyzing what kind of operation each signal line on the system bus 104 is performing.

The signal line state retrieval apparatus 112 includes a system bus connection unit 106, a retrieval memory 110, a signal retrieval control unit 109, a processor 108, a command application unit 107, and a screen as shown in FIG. The display section 111 is operated. That is, when information about a signal line to be searched through the command application unit 107 is applied to the processor 108, the processor 108 analyzes the applied information and transmits the information to the signal line search control unit 109. The signal line retrieval control unit 109 is connected to the system bus connection unit 106 when the signal line attempted to connect with the system bus 105 at every clock cycle from the system bus connection unit 106 matches the information of the signal line transmitted from the processor 108. The state data for the signal line attempted to be connected is controlled to be stored in the search memory 110. The search memory 110 transmits the state data of the signal line stored by the read command applied from the processor 108 to the processor 108, and the processor 108 transmits the state data of the signal line transmitted from the search memory 110. It is displayed through the screen display unit 111 so that the user can grasp the state of the signal line on the system bus 105 desired.

However, such a signal line state searching device 112 is not diagnosed with respect to a failure that may occur within itself, so that when a failure occurs in the signal line state searching device 112, the corresponding signal line on the system bus 105 Although the operation state is normal, the user is notified that an error has occurred in the operation state of the corresponding signal line, and the user recognizes the state of the corresponding signal line incorrectly.

Accordingly, an aspect of the present invention is to provide an apparatus and method for retrieving signal line status on a system bus capable of diagnosing whether a failure occurs in a computer system having a multiprocessor structure.

In order to achieve the above object, an apparatus according to the present invention is a computer system having a structure in which a plurality of processors are connected to a system bus, which attempts to connect signal lines on the system bus at every clock cycle, and the state of the signal lines that are connected. A system bus connection for transmitting data; A retrieval memory for storing state data of signal lines transmitted from the system bus connection portion; A command applying unit which is controlled by a user and applies information on a signal line to which a state of the signal lines on the system bus is to be retrieved; When information on a predetermined signal line is applied from the command application unit, specific data is sequentially written to each predetermined area of the search memory and the system bus connection unit, data stored in the predetermined area is read, and the written value and the read value are compared to determine whether a failure occurs. If the check result indicates that the search memory and the system bus connection are both normal, control is performed to perform a state search for a predetermined signal line. If the check result indicates that a fault exists in either of the search memory and the system bus connection, the predetermined signal line A processor for controlling a state search to not be performed; A first display unit configured to display a check result of whether a processor has a failure; Signal line search control unit that controls the signal line search so that the status data of the signal line connected at the system bus connection is transmitted to the search memory when the information about the signal line requested to be searched from the processor and the signal line attempted to be connected at the system bus connection are the same. ; And a second display portion for displaying status data on a predetermined signal line read from the search memory under the control of the processor.

In order to achieve the above object, the method according to the present invention is a system bus connection for retrieving the state of a signal line on a system bus of a computer system having a multiprocessor structure, and a system bus connection attempting to connect to the system bus every clock cycle, A signal line state retrieval apparatus comprising: a search memory for storing state data; a processor for performing overall control for retrieving a state of a signal line; and a signal line retrieval control unit controlled by the processor to control retrieval of a signal line designated by a user. Writing a predetermined data in a predetermined position of the retrieval memory when a state retrieval of a predetermined signal line among the signal lines on the system bus is requested by the controller; If the predetermined data is written at a predetermined position in the retrieval memory, reading the data written at the predetermined position; Comparing the data read in the reading step with the data written in the writing step with respect to the search memory; Determining that the search memory is normal when the read data and the written data coincide in the comparison step with respect to the search memory, and writing predetermined data at a predetermined position in the system bus connection portion; Reading data written at a predetermined position of the system bus connection unit; Comparing the data read in the reading step with the data written in the writing step for the system bus connection; Determining that the system bus connection is normal when the read data and the written data coincide in the comparison step with respect to the system bus connection, and retrieving a state for the signal line requested by the user; As a result of performing the comparison step for the search memory and the comparison step for the system bus connection, if the result of any one of the comparison steps is obtained as different from the read data and the written data, it is determined that a failure has occurred in the signal line state searching device and the state of the signal line is searched. It characterized in that it comprises a step of not working.

Next, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a detailed diagram of a signal line state search apparatus on a system bus according to the present invention, which attempts to connect to the system bus 105 at every clock cycle and transmits the state data of each signal line. A command application unit 107 capable of inputting information on a desired signal line, a processor 201 for checking a state of a signal line on a system bus 105 desired by a user and checking whether there is a failure in a signal line state retrieving device as in the past; A message display unit 202 for displaying a message as a result of checking whether a signal line state retrieval device has a failure, and a signal line retrieval control unit 109 for controlling the state retrieval of the signal line requested by the processor 201. ), A retrieval memory (203) for storing state data for the retrieved signal lines, and a screen table for displaying state data for the retrieved signal lines It consists of 111.

The signal line state searching device on the system bus 105 configured as described above is operated as follows.

First, when a user applies information about a signal line to be searched in the system bus 105 through the command application unit 107, it is transmitted to the processor 201.

When a command for requesting a state search for a predetermined signal line is applied from the command application unit 107, the processor 201 checks whether there is an obstacle in the signal line state search apparatus before searching for the state of the corresponding signal line. The check consists of writing, reading, and comparing predetermined data into the retrieval memory 203 and the system bus connection unit 204.

That is, the processor 201 first writes '55H (hex. 55H becomes 0101 0101') in a specific area of the search memory 203, and then reads the data stored in the specific area. Check if the data read is '55H'. If the check result is '55H', the processor 201 repeatedly uses the 'AAH' data to repeatedly write and read the specific area of the search memory 203 as described above, and check whether the written data and the read data are the same. Check it. As a result of the check, the processor 201 determines that the search memory 203 is normal, and outputs a message "O.K" to the message display unit 202.

However, as a result of writing and reading the above-described '55H' and / or 'AAH' values, the processor 201 determines that the search memory 203 is abnormal when the written value and the read value are different. That is, as a result of writing and reading of '55H' and 'AAH', if the value of writing and reading of one data is different, or of writing and reading of '55H' and 'AAH'. When both the written value and the read value are different, the processor 201 determines that a failure has occurred in the search memory 203 and outputs a message of 'NOK' to the message display unit 202. When the message 'NOK' is output as described above, the processor 201 ends the state searching operation for the signal line on the system bus 105.

As a result of checking whether there is a failure in the search memory 203 described above, if an 'OK' message is output from the processor 201, the processor 201 checks whether there is a failure in the system bus connection unit 204. Checking whether there is a failure on the system bus connection unit 204 also writes '55H' and 'AAH' data at a specific location of the system bus connection unit 204 and reads data written at a specific location, as is done in the search memory 203. Thereafter, the written value and the read value are compared with each other, and if it is the same, the system bus connecting portion 204 is determined to be normal.

However, as a result of the comparison, when the written value and the read value are different, it is determined that the system bus connecting portion 204 is abnormal. The determination result is output in the form of 'OK / NOK' as in the search memory 203 described above, and the output data is displayed on the message display unit 202. If it is determined that the system bus connection unit 204 is abnormal, the processor 201 does not perform a signal line searching operation. However, if the system bus connection unit 204 is determined to be normal, the processor 201 controls the signal line state retrieving device 109 such that the state for the required signal line is retrieved through the command application unit 107 as shown in FIG. do.

The signal line state retrieving device 109 compares the information of the signal line transmitted from the processor 201 with the information of the signal line to which the system bus connection unit 204 attempts to connect as shown in FIG. 1, and in the same case, the system bus connection unit ( 204 and search memory 203 are controlled so that the state data of the signal line to which connection is attempted is stored in search memory 203. FIG. The state data of the signal line thus stored is read by the processor 201 and output through the screen display 111.

Since the above-described embodiments are presented to help the understanding of the present invention, the scope of the present invention should be defined by the claims to be described later. For example, the above-described embodiment is implemented by checking whether there is a failure in the search memory 203 and then checking whether there is a failure in the system bus connection unit 204, but the checking order thereof can be changed. Those skilled in the art will appreciate that such modifications fall within the scope of the technical idea of the present invention.

As described above, according to the present invention, a signal line state search apparatus on a system bus provided in a medium computer system having a multiprocessor structure checks whether a failure occurs on its own before searching for a state of a required signal line, and only in a normal case. By implementing the search for the state of the required signal line, it is possible to more accurately search the state of each signal line on the system bus.

Claims (3)

A computer system having a structure in which a plurality of processors are connected to a system bus, the computer system comprising: a system bus connection unit which attempts to connect to signal lines on the system bus at every clock cycle and transmits state data of the connected signal lines; A retrieval memory for storing state data of signal lines transmitted from the system bus connection unit; A command applying unit which is controlled by a user and applies information on a signal line to which a state of the signal lines on the system bus is to be retrieved; When information on a predetermined signal line is applied from the command application unit, specific data is sequentially written to each predetermined area of the search memory and the system bus connection unit, data stored in the predetermined area is read, and the written value and the read value are compared. Check whether there is a failure, and when the check result, both the search memory and the system bus connection unit are normal, control to perform a state search for the predetermined signal line, and as a result of the check, the search memory and the system bus connection unit A processor for controlling a state search for the predetermined signal line if any one of the faults is present; A first display unit configured to display a check result of whether the processor has the failure; If the information on the signal line requested to be searched from the processor and the information of the signal line attempted to be connected at the system bus connection unit are the same, the signal line search is controlled to transmit the state data of the signal line connected at the system bus connection unit to the search memory. A signal line search controller; And a second display unit for displaying status data of the predetermined signal line read out from the search memory under the control of the processor. In order to retrieve the state of the signal line on the system bus of a computer system having a multiprocessor structure, a system bus connection that attempts to connect to the system bus every clock cycle, a search memory for storing state data on the retrieved signal line, and the state of the signal line A signal line state retrieval apparatus comprising a processor for performing overall control for retrieving a signal, and a signal line retrieval control unit controlled by the processor to control retrieval of a signal line designated by a user. If a state search for a signal line is required, writing predetermined data to a predetermined position in the search memory; Reading the data written at the predetermined position when the predetermined data is written at the predetermined position of the search memory; Comparing whether the data read in the reading step with the data written in the writing step match with the search memory; Determining that the search memory is normal when the read data and the written data coincide in the comparison with the search memory, and writing the predetermined data at a predetermined position of the system bus connection unit; Reading data written at the predetermined position of the system bus connection unit; Comparing the data read in the reading step with the data written in the writing step for the system bus connection unit; Determining that the system bus connection unit is normal when the read data and the written data coincide in the comparison step with respect to the system bus connection unit, and retrieving a state of the signal line requested by the user; As a result of performing the comparison step for the search memory and the comparison step for the system bus connection unit, if the read data and the written data are different from each other, it is determined that a failure has occurred in the signal line state searching device. A signal line status search method on a system bus, comprising the step of not performing a status search operation of a signal line. 3. The signal line state on the system bus according to claim 2, wherein the signal line state searching method further comprises the step of displaying the result compared in the comparing step for the searching memory and the comparing step for the system bus connection unit, respectively. Search method.