JPH0423152A - Diagnostic device for operation processor - Google Patents

Abstract

PURPOSE:To diagnose a normal or abnormal state of a local arithmetic bus in a short time by inputting and storing the data in each local arithmetic bus in the prescribed timing by an arithmetic bus tracing device and performing the diagnosis by a CPU based on the stored data. CONSTITUTION:An arithmetic bus tracing device 8 fetches the arithmetic data transmitted through the local arithmetic buses 2a - 2e provided in an operation processor 2 for each bus in the prescribed timing under the control of an arithmetic controller 4. Thus the device 8 fetches simultaneously the arithmetic data on all local arithmetic buses with a single fetching action and synchronously with the arithmetic cycle of the processor 2 at the start of a diagnostic program. Then the device 8 stores the data in sequence. Based on these obtained data, a CPU 1 or the controller 4 diagnose the transmission of data for each bus and the working of the processor 2. As a result, the buses 2 can be easily and accurately diagnosed in a short time.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a diagnostic device for an arithmetic processing device, and in particular,
The central control unit (CPU) controls and manages the entire system.
) is connected to a processor that performs predetermined calculations and stores data under the control of the CPU. .

[Conventional technology]

In an arithmetic processing unit that is connected to a CPU that controls and manages the entire system and executes calculations and storage of various data,
A conventional circuit configuration and diagnostic method for diagnosing the normality or abnormality of a local operation bus that connects component circuits of the device will be described with reference to FIG.

In FIG. 3, 1 is a CPU that controls the entire system, and 2 connected to this is an arithmetic processing unit. The arithmetic processing device 2 includes a CPU connection device 3, a calculation control device 4, a calculation device 5, and a calculation storage device 6. The CPU connection device 3 is connected to the CPUI via the main bus 7 and has a function of exchanging data with the CPU 1. The calculation control device 4 is loaded with a calculation processing program from the CPUI and has a function of controlling the entire calculation processing device 2 . The arithmetic device 5 executes four arithmetic operations, logical product sums, etc., and the calculated results are stored in the arithmetic storage device 6.

The aforementioned component circuits of the arithmetic processing device 2 include local arithmetic buses 2a, 2b, and 2c for transferring arithmetic data.

2d and 2e and data transfer buses la and lb for transferring data between the CPUI and the CPU. In the arithmetic processing device 2 having the above configuration, under the control of the arithmetic control device 4, the arithmetic operation and its repetition, as well as the storage of the arithmetic results, are performed continuously at a constant cycle, and thereby the predetermined arithmetic operation and the arithmetic result are performed. storage is performed periodically.

Next, a method for diagnosing the data transmission state of the local arithmetic buses 2a to 2e of the arithmetic processing device 2 having the above configuration will be explained. Conventional diagnostic methods check these local operational buses step by step. First, regarding the local arithmetic bus 2a, the CPU 1 writes data to the arithmetic storage device 6 via the arithmetic control device 4, and then reads the written data to check whether the data has been correctly transferred via the bus 2a. The bus 2a is diagnosed by checking.

The local calculation buses 2b, 2d, and 2e are used to transmit data to the calculation device 5 via the calculation control device 4 and the bus 2b, and use the bus 2e to execute calculations that do not cause changes in data. The data is stored in the calculation storage device 6 via the bus 2d. The CPU 1 reads out the stored data using the bus 2a, and checks whether the sent data has been processed correctly.
Diagnose 2e all at once. Therefore, local operation bus 2b
, 2d, and 2e, it is a condition that the local operation bus 2a is normal.

Finally, regarding the local arithmetic bus 2C, the CPU 1 temporarily writes data to the arithmetic storage device 6 using the arithmetic control device 4 and the bus 2a, and then writes the data to the arithmetic device 6 via the bus 2c.
The data is sent to the arithmetic unit 5, and the arithmetic unit 5 executes an arithmetic operation that does not change the data.Then, the data is transferred to the arithmetic storage unit 6 via the bus 2d, and the data is stored at an address different from that in the above case. Thereafter, the bus 2c is diagnosed by reading the data stored by the CPUI using the bus 2a and checking whether the first written data was processed correctly. Therefore, in order to diagnose the local arithmetic bus 2c, the local arithmetic bus 2a is used.

The condition is that 2d is normal.

By going through the above procedure, it becomes possible to diagnose the data transmission status of all the local operation buses 2a to 2e in the operation processing device 2.

[Problem to be solved by the invention]

In the conventional method of diagnosing a plurality of local operation buses in the arithmetic processing device 2 described above, it is necessary to use other local operation buses when diagnosing the normality or abnormality of a specific local operation bus. This has to be done step by step in this order, which is time consuming and requires a long time for diagnosis. In addition, if an abnormal local operation bus is discovered midway through, it is impossible to diagnose whether the local operation buses thereafter are normal or abnormal.

Also, for example, the local operation buses 2b and 2d.

As is clear from the diagnosis of 2e, multiple local operation buses are diagnosed at the same time, so if they are diagnosed as normal, it can be determined that all local operation buses are normal. If an abnormality is diagnosed, a problem arises in that it is not possible to know which local operation bus is abnormal.

Furthermore, with the conventional diagnostic method, only the data transmission capabilities of the local arithmetic buses 2a to 2e in the arithmetic processing device 2 can be diagnosed, and the operation of the arithmetic processing device 2 itself cannot be investigated. On the other hand, in the past, there has been a device configured to include a tracing device for tracing operations within the arithmetic processing device for the purpose of diagnosing whether or not the arithmetic processing device is operating at a constant cycle. According to the trace device, since it is configured to perform diagnosis based on the result of calculation, it has a problem in that it cannot determine whether it is a failure in the local calculation bus or in the synchronization clock of the component circuit elements. was.

In view of the above-mentioned problems, an object of the present invention is to be able to easily and accurately diagnose a local operation bus in a short time.
It is an object of the present invention to provide a diagnostic device for an arithmetic processing device that can simultaneously obtain diagnostic results for each local arithmetic bus and can diagnose whether or not various operations in the arithmetic processing device are being executed at a constant cycle.

[Means to solve the problem]

The diagnostic device in the first arithmetic processing device according to the present invention includes:
A connection device that is connected to a central control device that controls the entire system and exchanges data with the central control device;
An arithmetic control device that receives an arithmetic processing program from the central control device via this connection device and controls arithmetic processing according to this program, an arithmetic device that executes arithmetic processing, and an arithmetic storage device that stores arithmetic results. In an arithmetic processing device consisting of a plurality of local arithmetic buses for data transfer to connect each of the above devices and execute data arithmetic and storage, the plurality of local arithmetic buses are connected to the input side. An arithmetic bus trace device is provided, and the arithmetic bus trace device inputs and stores the data on each local arithmetic bus at a predetermined timing, and the central processing unit reads out the data stored in the arithmetic bus trace device and processes the data based on the data. It is characterized by being designed to perform diagnosis.

In the diagnostic device for an arithmetic processing device according to the present invention, it is also possible to use a register device instead of the arithmetic bus trace device in the above configuration.

The diagnostic device in the arithmetic processing device according to the present invention can be configured such that the arithmetic control device performs diagnosis in each of the above device configurations and transfers the diagnosis result to the central processing device.

In the diagnostic device for an arithmetic processing device according to the present invention, in each of the device configurations described above, the diagnostic processing based on the arithmetic bus trace device and the central processing unit or the arithmetic control device is performed by the central processing unit and the arithmetic processing device. It is characterized by being executed immediately before executing the work process.

[Effect]

In the diagnostic device for an arithmetic processing device according to the present invention, an arithmetic bus trace device is provided inside the arithmetic processing device, and the arithmetic bus trace device performs the following operations based on the control of the arithmetic control device.
Arithmetic data transmitted on a plurality of local arithmetic buses within an arithmetic processing device are fetched and stored at a predetermined timing for each bus. Therefore, in one fetch operation, the calculation data of all the local calculation buses is taken in simultaneously, and this data is taken in synchronized with the calculation cycle of the processing unit from the start of the diagnostic program. Store data on the bus sequentially. Using the data obtained by the arithmetic bus trace device in this way, the central processing unit or the arithmetic control unit diagnoses the data transmission of each local arithmetic bus and the operation of the arithmetic processing unit. Instead of the arithmetic bus trace device, it is also possible to use a register device configured to perform a similar function.

〔Example〕

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

FIG. 1 shows a configuration example of a diagnostic device in an arithmetic processing device according to the present invention, and FIG. 2 shows a detailed circuit of an arithmetic bus trace device. In FIGS. 1 and 2, the same elements as explained in FIG. 3 are given the same reference numerals. In FIG. 1, 1 is a CPU that controls and manages the entire system;
Reference numeral 2 denotes an arithmetic processing unit that is controlled by a CPUI and to which a diagnostic device according to the present invention is applied. 3 is a CPU connection device, 4 is a calculation control device, 5 is a calculation device, and 6 is a calculation storage device, which are the circuit elements already explained in FIG. These circuits are connected by a main bus 7, data transfer buses la and lb, and local operation buses 2a to 2e.

In the arithmetic processing device 2, the arithmetic bus stress device 8
is provided. In the arithmetic bus trace device 8, bus portions branched from each of the local arithmetic buses 28 to 2e are connected to its input side, and a data transfer bus IC connected to the CPU connection device 3 is connected to its output side.

Therefore, based on the connection relationship on the input side, the arithmetic bus trace device 8 can read and store the arithmetic data transmitted on each of the local arithmetic buses 2a to 2e at an appropriate timing. As shown in FIG. 2, branched local arithmetic buses 2a to 2e are connected to the arithmetic bus trace device 8, respectively. Inside the arithmetic bus trace device 8, trace devices 81 to 85 are provided corresponding to the local arithmetic buses 2a to 2e, respectively.
Data 2e is fetched and stored at a predetermined timing. As shown in FIG. 2, each tracing device 8
The timing at which the data processing units 1 to 85 take in and fetch data is determined by the control of the arithmetic control device 4. Further, the timing at which data is taken out from each trace device 81 to 85 is determined by the control of the CPU connection device 3.

Each of the trace devices 81 to 85 in the arithmetic bus trace device 8 has a memory function, and has a function of periodically reading data at predetermined time intervals and storing the fetched arithmetic data in chronological order.

Next, the diagnosis method of this embodiment based on the arithmetic bus trace device 8 will be explained. A program for diagnosing the local operation buses 2a to 2e is stored in the memory of the CPU 1. When the CPUI diagnoses the local arithmetic buses 28 to 2e of the arithmetic processing unit 2, the diagnostic program is
It is loaded into the calculation control device 4 via the U connection device 3.

Next, the arithmetic control device 4 starts a diagnostic operation in response to a RUN command from the CPUI. In this case, the arithmetic control device 4 controls the arithmetic processing device 2, causes the arithmetic device 5 to perform arithmetic operations such as the four arithmetic operations and the sum of logical products, and the arithmetic storage device 16 stores the arithmetic results or data temporarily saved during the calculation. remember. The arithmetic bus trace device 8 traces local arithmetic buses 28 to 2e for data transfer used for data arithmetic or storage.

Arithmetic operations such as four arithmetic operations and logical product sums are executed in the arithmetic unit 5, but data is input to the arithmetic unit 5 directly from the arithmetic control unit 4 via the local arithmetic bus 2b, or Local calculation bus 2a and calculation storage device 6
is input via the local arithmetic bus 2c, or the result obtained by the arithmetic unit 5 by repeating the arithmetic operation is input via the local arithmetic bus 1e. The result of the calculation is transferred from the calculation device 5 to the calculation storage device 6 via the local calculation bus 2e.
is memorized. The data stored in the calculation storage device 6 is then read by the CPU via the data transfer bus 1b and the CPU connection device 3.

While the above calculations are being performed by the processing unit 2, the calculation bus trace device 8 traces the respective data on the local calculation buses 2a to 2e to the corresponding trace devices 81 to 85 at a predetermined timing. The arithmetic bus trace device 8 checks whether each of the local arithmetic buses 2a to 2e is transmitting arithmetic data accurately, and whether the operations of arithmetic processing unit 5, such as calculation, repetition, and storage, are executed at a constant cycle. The purpose is to diagnose whether or not.

In the above calculation, the data fetching, calculation, and storage of the calculation device 5 are performed at regular intervals. When repeating an operation, multiple operations are performed simultaneously, such as fetching initial data, fetching the operation and result, and finally performing the operation and storing. Therefore, the arithmetic bus trace device 8 sequentially stores all data on the local arithmetic buses 2a to 2e in synchronization with the arithmetic cycle from the start of the diagnostic program. In this way, the data stored in the arithmetic bus trace device 8 under the control of the arithmetic control device 4 is transferred to the CPU connection bus 2.
The data is read by the CPU 1 via the C and CPU connection device 3, and then diagnosed by the CPUI as to whether data transmission on each local arithmetic bus and operation of the arithmetic processing device 2 are normal.

As described above, the function of the arithmetic bus trace 8 diagnoses the data transmission operation of the local arithmetic buses 2a to 2e of the arithmetic processing device 2 and the arithmetic operation of the entire arithmetic processing device 2. , usually CPUI
This is done immediately before the original job, such as image calculation processing, is executed. Therefore, the diagnostic operation must be performed in as short a time as possible.

Also, instead of the arithmetic bus trace device 8, a register device that simply fetches the respective data of the local arithmetic bus can be used. In this case, the data fetching timing is such that the arithmetic processing unit 2 executes data fetching, calculation, and storage operations based on the diagnostic program.
Fetch in register when all local arithmetic buses are enabled. By repeating this a plurality of times, the same function as the arithmetic bus trace device 8 can be achieved.

Further, in the embodiment described above, the main body that performs the diagnosis is the CPU 1, but the CPU 1 may be configured to have the arithmetic control device 4 perform the diagnosis instead. In this case, it is desirable to have the calculation control device 4 perform self-diagnosis when no calculations such as image processing are being performed, and to have the CPU confirm the diagnosis results immediately before the image processing operation. .

〔Effect of the invention〕

As is clear from the above description, according to the present invention, since the arithmetic processing unit is provided with the arithmetic bus tracing device,
By executing a single diagnostic operation, it is possible to easily, quickly, and accurately discover in which of the plurality of local operation buses of the arithmetic processing device a malfunction has occurred. Also, when the processing unit is performing calculation processing for diagnosis, the calculation bus trace device periodically stores the calculation data of all local calculation buses at a predetermined timing, that is, in synchronization with the calculation cycle. Therefore, the cause of abnormality in the operation of the arithmetic processing device can be diagnosed in detail and accurately based on these data.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram showing an embodiment of a diagnostic device according to the present invention, FIG. 2 is a detailed circuit diagram of an arithmetic bus trace device,
FIG. 3 is a circuit diagram for explaining a conventional diagnostic method. [Explanation of symbols] 1... Central processing unit (CPU) 2...
・Arithmetic processing unit 2 a to 2e 3 ・ ・ ・ − 4 φ φ ・ 5 ・ ・ ・ ・ 6 ・ ・ ・ ・ 8 ・ ・ ・ ・ 81 to 85 ・Local calculation bus・CPU connection device・Arithmetic control device・Arithmetic device, memory device for arithmetic operation, arithmetic bus trace device, trace device

Claims (4)

[Claims] (1) A connection device that is connected to a central control device that controls the entire system and exchanges data with the central control device, and a processing program that is loaded from the central control device via this connection device. , an arithmetic control device that controls arithmetic processing according to this program, an arithmetic device that executes the arithmetic processing, an arithmetic storage device that stores the arithmetic results, and each of the above devices are connected, and the data arithmetic and
In an arithmetic processing device comprising a plurality of local arithmetic buses for data transfer for executing storage, an arithmetic bus trace device is provided which connects the plurality of local arithmetic buses to an input side, and this arithmetic bus trace device is configured to perform a predetermined A calculation characterized in that data on each of the local calculation buses is input and stored at timing, and the central processing unit reads out the data stored in the calculation bus trace device and performs diagnosis based on the data. Diagnostic device in processing equipment. (2) A diagnostic device for an arithmetic processing device according to claim 1, characterized in that a register device is used in place of the arithmetic bus trace device. (3) In the diagnostic device for an arithmetic processing unit according to claim 1 or 2, the arithmetic processing is characterized in that the arithmetic control unit performs diagnosis and transfers the diagnosis result to the central processing unit. Diagnostic device in equipment. (4) In the diagnostic device for an arithmetic processing device according to any one of claims 1 to 3, the diagnostic processing based on the arithmetic bus trace device and the central processing unit or the arithmetic control device is carried out by the A diagnostic device for an arithmetic processing device, characterized in that the diagnosis device is executed immediately before a processing device and the arithmetic processing device execute original work processing.