JPS63168757A - Bus error detecting system - Google Patents

Abstract

PURPOSE:To easily and accurately demarcate a faulty part at the time of occurrence of a bus error by detecting the bus error by an information processor using a bus and allowing at least another information processor not using the bus to detect the error. CONSTITUTION:In formation processor 1-4 and an information processor 5 with a means for always detecting bus error transmit and receive an address command and data via a common bussignal group 10 on the common bus. By using a bus using signal 11 on the common bus, when each information processing unit uses the bus, the unit using the bus informs the fact that the bus is in use at present and cannot by used to the other information processor. The information processor 5 with a means for always detecting bus errors which receive the bus using signal 11 detects the error of the bus even at the time of bus transfer independently of its own unit. Thus, the fault part is demarcated easily and accurately at the time of occurrence of bus error.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an information processing device connected to a bus, and in particular,
Concerning Hass error detection method.

〔overview〕

The present invention provides a bus error detection method in which the information processing device detects a bus error on a common bus to which a plurality of information processing devices are connected, in which the bus error is detected by the information processing device that is using the bus. By detecting bus errors in at least one other information processing device that is not using the bus, it is possible to easily and accurately isolate the fault location when a bus error occurs.

[Conventional technology]

Conventionally, bus error detection in multiple information processing devices connected to a common bus was configured such that only the information processing devices involved in signal transfer using the bus detected errors during transfer. .

[Problem that the invention seeks to solve]

In the conventional bus error control method described above, only the information processing device that uses the bus and is involved in data transfer,
In order to detect bus errors, since it is not involved in data transfer but is physically connected to all other information processing devices, there may be errors caused by information processing devices that are not involved in data transfer, or errors caused by the bus itself. This has the drawback that error information indicating that the error is caused by the connection cannot be left, making it difficult and inaccurate to isolate the location of the error.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bus error detection method that eliminates the above-mentioned drawbacks and makes it possible to easily and accurately isolate the fault location when a bus error occurs.

[Means for solving problems]

The present invention provides a bus error detection method in which the information processing device detects a bus error on a common bus to which a plurality of information processing devices are connected, in which a bus error is detected in the information processing device that is using the common bus for a certain period of time. The present invention is characterized in that, at the same time, bus errors are also detected in at least one of the information processing apparatuses that are not in use.

[Effect]

When a bus error occurs, the bus error is not only detected by the information processing device that is using the common bus at the time;
For example, one information processing device having bus error constant detection means is provided to constantly detect bus errors.

Therefore, conventionally, for example, when a hash error occurs during the transfer of information between two information processing devices, even if it is difficult to determine which of the two information processing devices is at fault or whether there is another cause, It is possible to make judgments by adding detection data that is constantly being detected, making it possible to easily and accurately isolate the fault location.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

The figure is a block configuration diagram showing an information processing system to which an embodiment of the present invention is applied. This embodiment is an example in which the present invention is implemented when five information processing devices are connected via a common bus.

The information processing bags W1.2.3 and 4 and the information processing device 5 with bus error constant detection means transmit and receive addresses, commands, data, etc. via the bus signal group 10 of the common bus. Further, when the bus is used between each information processing device using the bus use signal 11 of the common bus, information processing devices that are not using the other bus are informed that the bus is currently in use and cannot be used. Further, upon receiving this bus use signal 11, the information processing device 5 with bus error constant detection means performs bus error detection even during bus transfers that are not related to the device itself.

In such a configuration, if a bus error is detected in the information processing device 2 when data is transferred from the information processing device 1 to the information processing device 2 using the bus signal group 10, the information processing device 1
Although it is difficult to judge whether the error is caused by a fault, the information processing device 2, or some other cause, if no error is detected in the information processing device 5 with bus error constant detection means, there is a high probability that the information processing device 2 is faulty. If an error is detected, there is a high probability that the error is due to the information processing device 1 or other causes. Also during transfer from the information processing device 2 to the information processing device 3, the information processing device 5 with bus error constant detection means
When an error is detected in the information processing device 1, there is a higher probability that it is due to other causes than the information processing device 1, and the location of the failure can be easily and accurately isolated.

In bus control, many information processing devices are connected to the same common bus, so once a bus error occurs, it takes a lot of time to isolate the fault, and in the worst case, all information processing devices may have to be replaced. According to the embodiment, such cases can be reduced.

In this embodiment, the number of information processing devices equipped with a constant bus error detection means is one, but the number can be increased as needed, or depending on the frequency of transfer between information processing devices, it is optimal to add a constant bus error detection means. Further effects can be achieved by selecting a suitable number of information processing devices.

[Effects of the Invention] As described above, the present invention detects a bus error in a plurality of information processing devices connected to a common bus, which are involved in signal transfer using the bus for a certain period of time. In addition, by adopting a configuration in which another information processing device that is not involved in the transfer at that time also detects a bus error, it is possible to easily and accurately isolate the location of the failure when a bus error occurs.

[Brief explanation of the drawing]

The figure is a block configuration diagram showing an information processing system to which an embodiment of the present invention is applied. DESCRIPTION OF SYMBOLS 1-4... Information processing device, 5... Information processing device with bus error constant detection means, 10... Bus signal group, 11.
...Bus use signal.

Claims (1)

[Claims] (1) In a bus error detection method in which the information processing device detects a bus error on a common bus to which a plurality of information processing devices are connected, the information processing device that is using the common bus for a certain period of time detects a bus error. A bus error detection method characterized in that, at the same time, the bus error is also detected in at least one of the above-mentioned information processing devices that is not in use.