JPH0471225B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] In a computer system equipped with at least a service processor SVP, subchannel information corresponding to a plurality of input/output devices connected to each channel device is transmitted to the service processor.
To display it in real time on the SVP display,
On the storage device of the above service processor SVP,
The correspondence between subchannel numbers and device addresses is displayed in ascending or descending order of subchannel numbers, and a key number is assigned to each to form a first table. Based on the first table, identification is performed. A unit that can be stored in a read buffer consisting of the number of words,
By providing a second table indicating the storage start key number and storage end key number based on the above key number, subchannel information that is discontinuously expanded on the main storage device MS when viewed from the device address. of,
The blocks are divided into consecutive device addresses, read out to a read buffer on the storage device of the service processor SVP, and edited and displayed.

[Industrial application field]

The present invention relates to a subchannel information display method that reads out subchannel information discontinuously stored in a main storage device based on device addresses at high speed and displays it in real time in a device-compatible manner.

With recent advances in computer technology, data is increasingly being processed by computers in various fields, and as the amount of data to be processed increases, the number of input/output devices connected to the computer system increases. However, in order to accurately perform program debugging when developing a program (formware) in a channel control device that controls the input/output device or when changing functions, it is necessary to perform it in real time. It is necessary.

Therefore, corresponding to the above-mentioned large number of input/output devices, subchannel information set on the main storage device MS (for example, whether or not the input/output device is connected, operable/unusable status, usable/unusable status) , device end wait status from an active input/output device, etc.)
In debugging the program in the channel control device, it is necessary to be able to display the program in real time as the debugging of the program progresses.

Furthermore, during actual operation, the above-mentioned real-time display is required in order to more accurately recognize the constantly changing device states when grasping the operating states of devices in the system.

[Problems to be solved by conventional technology and invention]

FIG. 3 is a diagram illustrating a conventional subchannel information display method.

First, the channel processing unit CHP4 receives the input/output command SIO issued by the central processing unit CPU1, and stores the channel command word CCW22 from the main storage unit MS2.
By reading , input/output processing is executed between the channel device CH5 and the input/output device (I/O).

The status, control information, etc. of each input/output device during the input/output processing are allocated to each input/output device in the subchannel area 21 on the main storage device MS2 each time one transfer operation is completed. It is stored in the subchannel area 21.

Generally, the plurality of channel devices CH5 connected to the channel processing device CHP4 are configured such that, for example, a maximum of 256 input/output devices can be connected, and status information, control information, etc. regarding each input/output device is The subchannel information is set in the subchannel area 21 on the main storage device MS2 using the above procedure.

When the service processor SVP7 of the computer system reads and edits the subchannel information 21 on the main storage device MS2 and displays the edited information on the display 8 connected to the service processor SVP7, conventionally,
The subchannel information for each channel device CH5 was read out one by one for up to 256 devices.

However, when displaying the subchannel information 21 on the display 8 of the service processor SVP7, it is necessary to display it in the order of device addresses, but the subchannel information on the main storage device MS2 is
Due to the flexibility of the system configuration, the device addresses are not necessarily arranged consecutively in order, so the service processor SVP7 needs to instruct the "read subroutine" to read the read start position once. There was a problem in that real-time performance was impaired due to the overhead.

In view of the above-mentioned conventional drawbacks, the present invention reads subchannel information of a plurality of consecutive devices (I/O) in one read, thereby reducing the number of calls to the above-mentioned "read subroutine" and improving service processor performance. The object of this invention is to provide a method for reducing the overhead for reading out the subchannel information in SVP.

[Means for solving problems]

FIG. 1 is a diagram illustrating the principle of the subchannel information display method of the present invention.

In the present invention, at least in a computer system equipped with the service processor SVP 7, subchannel information 21 corresponding to a plurality of input/output devices connected to each channel device 5 is provided.
Display 8 of the above service processor SVP
The subchannels expanded on the main storage device 2 are displayed in real time.
A correspondence table between numbers and device addresses is generated on the storage device 71 of the service processor SVP7 in ascending or descending order of the subchannel numbers, and the first table 71a
and a storage device 71 of the service processor SVP7.
Reading buffer 7 for a specific number of words provided above
The number of words that can be stored at one time in 1c,
From the table 71a, the storage start key number of the subchannel information arranged in the order of device address,
A second table 71b is generated in which the storage end key No. After being transferred to the read buffer 71c, it is configured to be edited and displayed.

[Effect]

That is, according to the present invention, at least in a computer system equipped with a service processor SVP, subchannel information corresponding to a plurality of input/output devices connected to each channel device is displayed on the display of the service processor SVP. The above service processor is used to display in real time.
On the SVP storage device, the correspondence between subchannel numbers and device addresses is displayed in ascending or descending order of subchannel numbers, and a key number is assigned to each to form a first table. By providing a second table indicating the storage start key number and the storage end key number according to the key number in units that can be stored in the read buffer consisting of a specific number of words based on the table, the device The subchannel information that is discontinuously expanded on the main memory device MS in terms of addresses is divided into blocks in units of consecutive device addresses, and then the service processor
Since it is read to the read buffer on the SVP's storage device and edited and displayed, the number of times the "read subroutine" is called in the service processor SVP can be reduced, and the overhead in the service processor SVP can be reduced. There is.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.
FIG. 2 is a block diagram showing an embodiment of the present invention, in which a first table 71 provided on a storage device 71 of a service processor SVP7 is shown.
a, the second table 71b, and the read buffer 71c are the means necessary to implement the present invention. Note that the same reference numerals indicate the same objects throughout the figures.

The subchannel information display method of the present invention will be described below with reference to FIG. 1 and FIG. 2.

First, the subchannel information is stored in the main storage device MS2.
At the top, they are compatible with channel device CH5 and are expanded in order of subchannel numbers. Therefore, the service processor SVP 7 uses its own storage device 7.
1, add the subchannel information to the subchannel
A correspondence table between the subchannel numbers and device addresses is generated in ascending or descending order of numbers (ascending order is shown in this embodiment), and a table of correspondence between the subchannel numbers and device addresses is created, and key numbers are added to the table.
is added to form the first table 71a. (1st
(See FIG. 71a) Next, on the storage device 71, a read buffer 71c consisting of a plurality of words (for example, a capacity capable of reading subchannel information for 64 subchannels) is stored.
Prepare.

Therefore, based on the first table 71a, paying attention to the device addresses, extract the key numbers within the range that can be read at once in the order of the device addresses, and select the read start key number and the read end key number. versus'
A second table 71b consisting of information is generated.
(See FIG. 1 71b) After this, in order to actually obtain subchannel information, the following procedure is performed.

Based on the second table 71b, the service processor SVP7 calculates subchannel information that can be read out at once from the start key number and the end key number, and calls the "read subroutine". The subchannel information developed on the main storage device MS2 is accessed and stored in the read buffer 71c area.

Since the subchannel information read into the read buffer in this access is arranged in the order of device addresses, the necessary subchannel information is retrieved based on the subchannel number of the first table 71a described above.

The above processing is performed in the second table 71b.
Repeat above until there are no more start key numbers or end key numbers.

The subchannel information read in the above steps,
The service processor SVP edits the data and displays it on the display 8, for example, as data for debugging.

In this way, the present invention blocks the subchannel information developed in the order of subchannel numbers on the main memory device MS into small areas that can be read out in the order of device addresses, and stores the start key number and end key number.
A "read subroutine" is generated for each block based on the table.
The feature is that it is read from the main memory MS to the read buffer on the memory of the service processor SVP by calling .

〔Effect of the invention〕

As explained above in detail, the subchannel information display method of the present invention is compatible with a plurality of input/output devices connected to each channel device at least in a computer system equipped with a service processor SVP. To display subchannel information in real time on the display of the above service processor SVP, the above service processor
On the SVP storage device, the correspondence between subchannel numbers and device addresses is displayed in ascending or descending order of subchannel numbers, and a key number is assigned to each to form a first table. By providing a second table indicating the storage start key number and the storage end key number according to the key number in units that can be stored in the read buffer consisting of a specific number of words based on the table, the device The subchannel information that is discontinuously expanded in the main memory MS in terms of addresses is divided into blocks in units of continuous device addresses, and then the service processor
Since the data is read to the read buffer on the SVP's storage device and edited and displayed, it has the effect of reducing the number of calls to the "read subroutine" in the service processor SVP and reducing the overhead in the service processor SVP. be.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the principle of the subchannel information display method of the present invention, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 is an explanation of the conventional subchannel information display method. This is a diagram. In the drawings, 1 is a central processing unit CPU, 2 is a main storage MS, 21 is a subchannel area or subchannel information, 4 is a channel processing unit CHP,
5 is a channel device (CH), 7 is a service processor SVP, 71 is a storage device, 71a is a first table, 71b is a second table, 71c is a read buffer, 8 is a display, and ~ are read operations, respectively. show.

Claims (1)

[Claims] 1. At least in a computer system equipped with a service processor SVP7, subchannel information 21 corresponding to a plurality of input/output devices connected to each channel device 5,
Display 8 of the above service processor SVP
The subchannels expanded on the main storage device 2 are displayed in real time.
A correspondence table between numbers and device addresses is generated on the storage device 71 of the service processor SVP7 in ascending or descending order of the subchannel numbers, and the first key numbers are assigned in that order. table 71a
and the storage device 7 of the service processor SVP 71
Subchannel information 21 arranged in the order of device addresses in units of the number of words that can be stored at one time in the read buffer 71c of a specific number of words provided on 1.
Storage start key number and storage end key when reading
A second table 71b in which the numbers are paired is generated from the first table 71a, and the subchannel information 21 of the number of words indicated by the second table 71b is transferred from the main storage device 2.
A method of displaying subchannel information characterized by editing and displaying the information after transferring it to the read buffer 71c of the service processor SVP7.