JPH0358254A - Data transfer testing system for channel - Google Patents

Abstract

PURPOSE:To easily decide where the cause of failure in a data transfer test of a channel lies by comparing mutually data read out by a normal channel, data read out by a channel to be tested and an expected value. CONSTITUTION:A CPU 1 contains a test program 2 and an input/output processing operation instructing means 5, and the test program 2 contains a data comparing means 3 and a cause deciding means 4. At the time of a data transfer test of a channel 11p, the test program 2 prepares write data for a test and an expected value 8 in a write data store area 7 on a storage device 6. Subsequently, when a result of executing write/read-out of data by the channel 11p to be tested and the expected value 8 are compared and it is failure, the result of executing write/read-out of the data by using the channel to be tested, a result of read-out of the data by a normal channel 11q and the expected value 8 are compared mutually, and the cause of failure is decided. In such a way, a factor of a data comparison error can be discriminated easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a channel testing and diagnosis method, and more particularly to a data transfer testing method.

[Conventional technology]

Conventionally, in channel testing, one channel to be tested is used to transfer write/read data, and expected value data and read data are compared to determine whether the test is successful. That is, the data on the storage device is written to the peripheral device, the written data is read out to the storage device, and the expected value data is compared with the data read from the peripheral device to determine whether the test is successful.

[Problem to be solved by the invention]

The conventional test method described above has the disadvantage that when a data comparison error is detected during test diagnosis, it is not easy to determine whether the error is in the write data transfer process or in the continuous data transfer process. .

An object of the present invention is to provide a channel data transfer test method that allows, when a data comparison error is detected, to easily determine whether the cause of the error is in the write data transfer process or the read data transfer process. be.

[Means to solve the problem]

The channel data transfer test method of the present invention is a write/read method in which data is written/read from an input/output processing device that is provided in a peripheral device and performs input/output processing according to instructions from a CPU running a test program. a first read data storage area in which data read from the write/read data storage area of the peripheral device using the channel under test is stored; a second successive data storage area in which the data read from the read/write data storage area is stored, and the test program is configured to: and data comparison means for mutually comparing read data in a second read data storage area; The comparing means compares the read data in the first read data storage area read and stored by the channel, and if they do not match, the data is written to the RTT write/read data storage area of the peripheral device by the test channel and is determined to be normal. When the comparing means compares the read data in the second read data storage area read and stored by the channel with the expected value, and when they match,
The comparison means determines that the cause of the failure is in the data read transfer process of the channel under test, and compares the read data in the first read data storage area and the read data in the second read data storage area. -, when the comparison means determines that the cause of the failure is in the data write transfer process of the channel under test, and compares the expected value with the read data in the second read data storage area. If there is a mismatch, and the comparison means compares the read data in the first read data storage area and the read data in the second read data storage area, and there is no failure, write transfer processing and read of the channel under test are performed. and cause determining means for determining that there is a cause for failure in both transfer processes.

(Function) When the result of writing and reading data using the channel under test is compared with the expected value and it does not match, that is, it fails, the result of reading and writing data using the channel under test is compared with the expected value. By comparing the result of reading the data by the channel with the expected value, it is determined whether the cause of the failure was due to the data write transfer process or the data read transfer process, so the data transfer test is performed. The behavior that caused the failure can be easily determined.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an information processing apparatus showing an embodiment of the channel data transfer test method of the present invention, and FIG. 2 is a flow chart of the processing of the test program 2 shown in FIG.

This information processing device includes a CPUI, a storage device 6, an input/output processing device 10, a channel 1l1, . llp,...,
It consists of llq, . . . , lln and a peripheral device l2. The CPU 1 includes a test program 2 and an input/output processing operation instruction means 5, and the input/output processing operation instruction 5 instructs the input/output processing unit 10 to perform input/output processing to the peripheral device 12, and also a storage device 6. Also access.

Test program 2 includes data comparison means 3 and cause determination 4 steps
Contains. Peripheral device l2 includes a write/read data storage area l3, and is connected to input/output processing device lO through channels llp and llq. The input/output processing device 1O uses the storage device 6 to perform input/output operations for the peripheral device 12. The storage device 6 includes a write data storage area @7, an expected value 8, and read data storage areas 9l and 92.

In the data transfer test of the channel Ilp, the test program 2 prepares test hidden data and expected value 8 in the write data storage area 7 on the storage device 6. As shown in FIG. 2, the test program 2 issues an input/output operation instruction to the input/output processing device 10 by the input/output operation instruction means 5, and uses the test channel lip to read the data in the write data storage area 7. Write to the write/read data storage area l3 of the peripheral device 12 (
Step 21). Next, using the test channel llp, the data written to the a read/read data storage area 13 of the peripheral device 12 is read to the read data storage area 91 on the storage device 6 (step 22). Then, the data of the expected value 8 is compared with the data in the read data storage area 91 using the data comparison stage 3 to determine whether the data transfer of the test channel llp is successful or not (step 23). If the data of expected value 8 and the data in the transfer data storage area 9l are compared and there is a mismatch, that is, if the test is abnormal or fails, the data mismatch will occur in either the data write transfer or the continuous data transfer. To find out if there is a cause, test channel l
Data transfer is performed using a normal channel llq different from IP. From the input/output operation instruction stage 5, the data written in the write/read data storage area l3 in the peripheral device l2 by the test channel 1lp is read into the read data storage area 92 using the normal channel llq (step 24). Then, the data comparison means 3 compares the data in the read data storage area 92 with the data in the read data storage area 91 and the data of the expected value 8 (steps 25 and 26). Expected value 8
If the data in the read data storage area 92 match, it is determined by the cause determination step 4 that the cause of the data mismatch is in the data read transfer of the test channel llp (step 27). Further, if the data of the expected value 8 and the data of the read data storage area 92 do not match, and the data of the read data storage area 91 and the data of the read data storage area 92 match, the cause determining means 4 determines whether the test channel lip is It is determined that the data write transfer is the cause of the data mismatch (step 29). The data of expected value 8 and the data of read data storage area 92 do not match and the data of read data storage area 9
If the data of 1 and the data of the subsequent data storage area 92 do not match, the cause determining means 4 determines that there is a cause of the mismatch in both the write transfer and the read transfer (step 29).

In the channel data transfer test method of this embodiment, when an error is detected by the data comparison means 3 in comparing the data with the expected value 8, the cause determination means 4 determines that the error is in the data JF transfer of the test channel. fi1 is determined and it becomes clear whether it is in data read transfer or data read transfer.

〔Effect of the invention〕

As explained above, in the present invention, when the read data written and read by the channel under test and the expected value are compared by the comparing means and there is a mismatch, that is, the data is failed, the data is compared with the read data read by the normal channel. Based on the result of the comparing means comparing the data read by the channel under test and the expected value, it is determined whether the cause of the failure was due to data write transfer processing or continuous data transfer processing of the channel under test. By providing the cause determining means, the cause of failure of the channel data transfer test can be easily and immediately determined.

[Brief explanation of drawings]

FIG. 11 is a block diagram of an information processing device showing an embodiment of the channel data transfer test method of the present invention, and FIG. 2 is a flow chart of the processing of the test program 2 shown in FIG. 1... CPU, 2... Test program, 3... Data comparison means, 4... Cause determination means, 5... Input/output Operation instruction means, 6... Storage device, 7... Write data area, 8... Expected value of read data, 91. 92... Read data storage area, lO.
...Input/output processing device, 11+.・・・． 111). −,llq,−,ll
n--channel, l2...peripheral device, l3...write/read data storage area. Patent Applicant: NEC Co., Ltd.

Claims (1)

[Claims] 1. A channel data transfer test method for performing a data transfer test from a CPU using a peripheral device connected to an input/output processing device via a plurality of channels, comprising: a write/read data storage area in which data is written/read from the input/output processing device that performs input/output processing according to instructions from the CPU on which a test program runs; a first read data storage area in which data read from the write/read data storage area of the peripheral device is stored; and a first read data storage area in which data read from the write/read data storage area of the peripheral device is stored using the normal channel. and a second read data storage area in which the test program stores the expected value of the read data, the read data in the first read data storage area, and the read data in the second read data storage area. data comparison means for comparing data with each other; and a first readout data written to a write/read data storage area of the peripheral device by the channel under test and read and stored by the channel under test. The comparison means compares the read data in the data storage area, and if there is a mismatch, the second When the comparing means compares the read data in the read data storage area and the expected value and they match,
The comparison means determines that the cause of the failure is in the data read transfer process of the channel under test, and compares the read data in the first read data storage area and the read data in the second read data storage area. If they match, it is determined that the cause of the failure is in the data write transfer process of the channel being tested.
The comparing means compares the expected value and the read data in the second read data storage area, and if the comparison means does not match, and the read data in the first read data storage area and the read data in the second read data storage area and a cause determination means for determining that there is a cause of failure in both write transfer processing and read transfer processing of the channel to be tested if the comparing means compares and there is a discrepancy.