JPH05197641A - Information processor - Google Patents

Abstract

PURPOSE:To shorten time for sampling or diagnosing log data by accelerating speed for processing scan operations by transmitting a scan operating instruction after selecting any one of plural channel devices. CONSTITUTION:When the fault of a channel device 400 is detected, a diagnostic controller 900 transmits a scan-out starting instruction frame designating the channel device 400 to a channel number to a scan controller 910 while using a path 50 so as to collect the log data. When the scan-out data are completely read out just for the prescribed number of bits, the scan controller 910 successively transmits the frames of the scan-out data designating the channel device 400 as the channel number to the diagnostic controller 900 while using a path 60. When all the scan-out data are completely transmitted to the diagnostic controller 900, the scan controller 910 transmits the frame of a scan-out end report designating the channel device 400 as the channel number to the diagnostic controller 900.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing device,
In particular, the present invention relates to an information processing device that collects information and diagnoses hardware when a failure occurs in the information processing device by a scan operation.

[0002]

2. Description of the Related Art FIG. 4 shows a block diagram of a conventional information processing apparatus. This conventional device includes an instruction execution device 100, a main storage device 200, an input / output processing device 300, and two input / output channels 400 and 500, which are auxiliary storage devices such as a disk device 600 and a magnetic tape device 700, respectively. Connected with. And input / output channel device 4
Diagnostic control device 800 when a failure occurs in 00 and 500
Uses the scan path to collect fault data and diagnose faulty devices.

Here, the scan path used in this type of information processing apparatus will be described.

There is a scan path function as a means for collecting log data of an information processing device or extracting the contents of an arbitrary flip-flop (hereinafter abbreviated as FF) in the device and writing data to the arbitrary FF. With the scan path function, a plurality of registers functioning to control the operation of the information processing device during normal operation are set in a mode called a shift mode so that the plurality of registers described above are shifted in one series. The registers are switched to a connected form, and this shift register is sequentially shifted by a scan clock called a shift clock. The input of the shift register is serially input bit by bit as scan-in data, and the output of the shift register is serially output as output scan bit by bit.

The operation when this scan function is applied to a channel device will be described with reference to FIG. The channel device mentioned here is a device that controls data transfer between the main storage device and the peripheral device, and usually a plurality of them exist in one information processing device. Channel device 400 in FIG.
When scanning the internal registers of the diagnostic control unit 8
00 sets the channel device 400 as the scan target channel using the path 7. Next, when the shift mode is set using the path 4, the shift mode selector 810 sets the shift mode in the path 9. Next, the diagnostic control device 800 prepares scan-in data for the path 5 and gives the shift clock to the path 6. When the shift clock is given, the scan-out data is output to the path 11 and the scan-out data selector 82
By 0, the scan-out data of the path 11 is output to the path 10. The diagnostic control device 800 receives the scan-out data of the path 10 and completes the 1-bit scan operation.

Usually, the operation from is repeated to scan a predetermined number of bits. Then, when the predetermined number of bits is completed, the scanning of one channel is completed. in this way,
In the conventional information processing apparatus, the above-described shift mode instruction / shift clock instruction, transmission / reception of scan-in / scan-out data, etc. are all performed by the diagnostic control device 800, and similarly in the scan control of the channel device. Was going.

[0007]

In the conventional information processing apparatus, since the scan control is entirely controlled by the diagnostic control apparatus, when a specific channel apparatus or all channel apparatuses in the information processing apparatus are scanned. Each channel must be performed in order, and if the information processing device has a large number of channel devices, the scanning operation takes time, and there is a problem in processing speed such as diagnosis using the scan and log data collection.

An object of the present invention is to provide a diagnostic control device with means for selecting one channel device out of a plurality of channel devices and sending a scanning operation instruction, and to enable scanning operations of a plurality of channels in parallel. By doing so, it is possible to provide an information processing apparatus that improves the processing speed of the scanning operation and shortens the log data collection time and the diagnosis time.

[0009]

A diagnostic control device selects one channel device from a plurality of channel devices for controlling data transfer between a main memory device and a peripheral device, and sends a scan operation instruction. And a scan control unit that is provided in each of the plurality of channel devices and that receives a scan operation instruction sent from the diagnostic control device and that scans each channel device in parallel.

[0010]

When the information processing device detects a failure of an input / output channel device, the diagnostic control device sends a scan-out start instruction frame with the channel device number specified to the scan control device to collect log data. ..
The scan control device that receives this scans out the channel device. When the scan controller finishes sending the scan-out data frame to the diagnostic controller, it sends a scan-out end report frame.

When the diagnostic control device diagnoses all channels, it sends a diagnostic start instruction frame specifying the channel device number to the scan control device, and repeats this for the scan control device of each channel. When the diagnosis start instruction frame has been sent to all channels, the end report frame is waited for. When the diagnosis is completed, the scan controller sends a diagnosis end report frame to the diagnosis controller.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention.
2 and 3 are diagrams showing format examples of instruction / response commands of the diagnostic control device and the scan control device in FIG. 1, respectively.

In FIG. 1, reference numeral 900 is a diagnostic control device, and 91
0 and 920 are channel scan controllers, 400 and 5
00 is a channel device. Further, in this embodiment, it is assumed that all commands and data are exchanged between the diagnostic control device 900 and the scan control devices 910 and 920 in a frame format, and the frame formats are shown in FIGS. FIG. 2 shows the diagnostic control device 900 to the scan control device 9 of FIG.
FIG. 2 shows an example of an instruction command frame to 10 and 920.
(1) is an example of an instruction without ancillary data such as a diagnosis start instruction / scanout start instruction, and FIG. 2 (2) is an example of an instruction of a frame with attached data such as a scan-in instruction.
3 is an example of a response command frame from the scan control devices 910 and 920 of FIG. 1 to the diagnosis control device 900, and FIG. 3A is an example of a response frame without attached data such as a diagnosis end report and a scan out end report. FIG. 3B is an example of a response frame with attached data such as scan-out data.

Next, the operation of this embodiment will be described with reference to the drawings.

The information processing device shown in FIG. 1 is a channel device 4.
When the fault of 00 is detected, the diagnostic control device 900 uses the path 50 to the scan control device 910 to collect the log data, and the scan out in which the channel device 400 is designated as the channel number in the format shown in FIG. Send a start instruction frame. When the scan control device 910 receives this command, the scan controller 910 scans out the channel device 400 if the channel numbers are compared and a scan out instruction is given to the channel device 400. For details of the scan-out operation, first, the scan controller 910 uses the path 10 to instruct the shift mode, and then, the scan clock is supplied from the path 20 to supply the scan-in data to the path 30 while reading the scan-out data from the path 40. .. When the scan control device 910 finishes reading the predetermined number of bits of scan-out data, the scan control device 910 uses the path 60 to set the channel number to the channel device 4 in the format of FIG.
The scan-out data frame in which 00 is designated is sequentially sent, and all the scan-out data is sent to the diagnostic control device 90.
When the transmission to 0 is completed, the scan control device 910 transmits to the diagnostic control device 900 a scan-out completion report frame in which the channel device 400 is designated as the channel number in the format of FIG. Then, when the diagnostic control device 900 receives this frame, the log data collection is completed.

Next, the operation of the information processing apparatus at the time of diagnosis will be described.

When the diagnostic control device 900 diagnoses all the channels, it uses the path 50 to give the scan control device 910 a diagnostic start instruction frame in which the channel device 400 is designated as the channel number in the format shown in FIG. And then to the scan controller 920 in the format shown in FIG. 2A, a diagnostic start instruction frame in which the channel device 500 is designated as the channel number is sent. When the diagnostic control device 900 finishes sending the diagnostic start instruction frame to all the channels, it waits for the end report frame. The scan controllers 910 and 920 have scan paths 10, 20, 30, respectively.
Channel device 4 using 40, 11, 21, 31, 41
00.500 diagnosis is performed, and when the diagnosis is completed, the scan control devices 910 and 920 respectively send a diagnosis end report frame designating the channel device 400 to the channel number in the format shown in FIG. The diagnostic control device 900 is sent to the diagnostic control device 900, and the scan control device 920 sends a diagnostic completion report frame designating the channel device 500 to the diagnostic control device 900. Receiving this, the diagnostic control device 900 terminates the channel diagnostic process when it receives the diagnostic end reports for all channels.

[0019]

As described above, according to the present invention, the scan control device is provided for each channel, and the scan operation can be independently performed for each channel. For this reason, the scanning operations of a plurality of channels can be executed in parallel, and the speed of the scanning operations of a plurality of channels can be increased. As a result, it is possible to increase the operation speed when collecting log data of a single channel or a plurality of channels or when diagnosing all channels in an information processing apparatus having a large number of channel devices.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of an information processing device according to the present invention.

FIG. 2A is an example of an instruction frame having no attached data, such as a diagnosis start instruction / scanout start instruction from the diagnostic control device to the scan control device in FIG. (2) ... This is an example of an instruction of a frame with attached data such as a scan-in instruction.

3 (1) ... FIG. 3 is an example of a response frame having no attached data, such as a diagnostic end report / scanout end report to the diagnostic control device from the scan control device in FIG. (2) ... It is an example of a response frame with attached data such as scan-out data.

FIG. 4 is a block diagram showing an embodiment of a conventional information processing apparatus.

[Explanation of symbols]

FIG. 1 900 Diagnostic control device 910 Scan control device 920 Scan control device 400 Channel device 500 Channel device 10 Scan mode path 20 Scan clock path 30 Scan in path 40 Scan out path 11 Scan mode path 21 Scan clock path 31 Scan in path 41 Scan out path 50 instruction frame path 60 response frame path FIG. 4 100 instruction execution device 200 storage device 300 input / output processing device 400 channel device 500 channel device 600 magnetic disk device 700 magnetic tape device 800 diagnostic control device 810 shift mode instruction channel selector 820 scan out Data channel selector 1 system data bus 2 channel device 400 data bus 3 channel device 500 data bus 4 shift mode instruction path 5 scan in data path 6 shift clock path 7 scan target channel instruction path 8 shift mode path of channel device 500 9 shift mode path of channel device 400 10 scan out data input path of diagnostic control device 800 11 channel device 400 scan-out data path 12 channel device 500 scan-out data path 13 magnetic disk device 600 data bus 14 magnetic tape device 700 data bus

Claims (2)

[Claims] 1. An information processing device, wherein when a failure occurs in an input / output channel device of the information processing device, the diagnostic control device collects fault data and diagnoses the faulty device by using a scan path. An information processing apparatus comprising means for selecting one channel device out of a plurality of channel devices for controlling data transfer between a main memory device and a peripheral device and transmitting a scan operation instruction. 2. An information processing device, wherein when a failure occurs in an input / output channel device of the information processing device, a diagnostic control device uses a scan path to collect fault data and diagnose the faulty device. An information processing apparatus, which is provided in each of the above, and has a scan control unit that receives a scan operation instruction sent from the diagnostic control apparatus and that scans each channel apparatus in parallel.