JPS6299846A - Collecting system for sense data on input and output device - Google Patents

Abstract

PURPOSE:To attain the setting control of log data of an I/O independently of an operation system by informing a data address and its length to firmware when a channel program us executed by a command code. CONSTITUTION:A decoder 11 decodes the command code part of a channel command word CCW when this CCW is read out of a main memory by a channel device and delivers the output of each command. The sense output of the decoder 11 is supplied to an AND gate 15 to secure an AND with a clock and then supplied to an address register 12. The register 12 reads the data address of the CCW part and holds it by the input given from a gate 15 when the command code of the CCW is sensed. An interface part gives an interruption to an firmware area and knows an interruption by detection of a sense command in the process of the interruption given to the firmware area. Then the output of the register 12 is written on a prescribed address position within the firmware area.

Description

[Detailed description of the invention] [Summary] A method for collecting log data of input/output devices in a computer system, in which when it is detected that the command code of the channel command word is sense, the command code specified by the channel command word is It was configured to notify the data address to the firmware, making it possible to control log data sets independently of the operating system.

[Industrial Field of Application] The present invention relates to a method for collecting failure log data of input/output devices.

[Prior Art] In electronic computer systems, input/output devices (hereinafter referred to as I/O devices)
When an abnormality occurs in the device (abbreviated as lo), an interrupt is generated with a device status word, the channel device is notified with the channel status word, and the central processing unit (hereinafter abbreviated as CPU) sends a sense channel to the channel device. A command word (hereinafter abbreviated as CCW) is issued and the channel issues a device status word and stores it at a predetermined address in main memory.

In computer systems, Ilo abnormalities are collected by an operating system (hereinafter abbreviated as O8) and recorded in a specific data center.

Maintainers printed out the contents and used them to maintain Ilo.

[Problems to be Solved by the Invention] For example, when performing remote maintenance, there are cases where it is desired to set the format of the Ilo log data set independently of O8.

In addition, if all the hardware that makes up the system is made by company A and is equipped with O3 made by company B, it will be difficult for company A to create a print program for the log data set, and it will be necessary to print the log data set independently from O8. You may want to obtain the format of Ilo's log data cents.

The present invention aims to provide a method for collecting Ilo sense data that can meet such demands.

[Means for Solving the Problems] FIG. 1 shows a principle block diagram of the Ilo sense data collection method of the present invention.

In FIG. 1, 1 is a channel device, 2 is a main memory, 3 is a CPU, and 4 is Ilo.

The storage area of the main storage device 2 includes an O3 area 21 equipped with O8 and a firmware area 2 that stores firmware.
There are 2.

Note that the firmware here does not refer to a microprogram, but rather a processing routine for special functions that are invisible to O8 at the machine language instruction level.
9-9937, etc.), the firmware also mediates I10 interrupts and the like.

Inside the channel device 1, there is a sense command detection unit 11 that detects a sense command from the CCW read from the main storage device 2, and a sense command detection unit 11 that detects a sense command from the CCW read from the main storage device 2.
Data address in CW and 8.

and a register 12 for reading and holding the write count.

The data address and byte count held in the register 12 are written to a predetermined location in the firmware area 22 of the main memory 2.

[Operation] With the above configuration, the firmware can request the service processor (hereinafter abbreviated as SVP) 5 to record a log, and the 5VP 5 can read the address of the sense data written by the channel by reading a predetermined position in the firmware area. Sense data can be read from the O3 area and stored in the SVP file 51.

In this way, the format of the log dataset is O
8 and can be controlled by firmware.

The present invention will be explained in more detail with reference to the embodiments shown in FIGS. 2 and 3.

FIG. 2 is a block diagram of an embodiment of the invention.

In FIG. 2, a decoder 11 is connected to the data bus and decodes the command code portion of the CCW.

Reference numeral 12 denotes an address register, which reads and stores data in the data address section and byte count section of the CCW when the output of the decoder 11 is "sense".

13 is an interface circuit on the main memory side; 14
is an interface circuit on the I10 side.

FIG. 3 is a circuit diagram showing the main parts of the decoder 11 and address register 12 in FIG. 2 in slightly more detail.

In FIG. 3, 10 indicates the CCW format.

The decoder 11 stores the channel device 1 from the main storage device 2.
When the CW is read, the command code portion of the CCW is decoded and an output for each command code is output.

The "sense" output of decoder 11 is input to AND gate 15, ANDed with the clock, and input to address register 12.

The address register 12 indicates that the CCW command code is “
Sense”, the input from the AND gate 15 causes
Reads and holds data addresses in the data address field and byte count field of the CCW.

The interface circuit 13 interrupts the firmware area 22 in the same way as a normal Ilo interrupt, and in the process of interrupt processing it learns that the interrupt is due to the detection of a sense command, and the output of the address register 12 is sent to a predetermined address in the firmware area 22. written to address location.

[Effects of the Invention] As explained above, according to the present invention, Ilo
This makes it possible to control log data sets, which has a great practical effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the principle of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 3 is a circuit diagram of a main part of the embodiment of the present invention. In the drawings, 1 is a channel device, 2 is a main character, 1. a device, 3 is a central processing unit (CPU), 4 is an input/output device (1/○), 5 is a service processor (SVP), 11 is a sense command detection means (decoder), 12 is an address register, 13 .14 is an interface circuit, 15 is an A N D gate, 21 is an OS area, 2
2 is the firmware area; 51 is the SVP file;

Claims (1)

[Claims] In a channel device of a computer system, means for detecting that a command code of a channel command word read from a main memory is a sense, and a data address and a byte count specified by the channel command word. and means for holding the data address and notifying the firmware, and is configured to notify the firmware of the data address and its length when a channel program including a channel command word whose command code is sense is executed. Output device sense data collection method.