JPH01124042A - Line control system in virtual computer system - Google Patents

Abstract

PURPOSE:To attain the execution of an I/O instruction and I/O end processing in one stage and to improve the performance of line control in a virtual computer system by allowing plural operating systems to use a line control part in common. CONSTITUTION:The line control part constituted of an I/O instruction execution means 50, an I/O end information means 51 and a line control table 52 is arranged on a system common address space 7. The control part 5 is constituted so as to be used in common by virtual computers alpha, beta by means of a virtual storage control function common use means 4 and the control part 5 can be used in common by the operating systems 2, 3. Consequently, the execution of an I/O instruction and I/O end processing can be attained in one stage and the performance of line control can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a line control method in a virtual computer system.

[Conventional technology]

The line control method in a conventional virtual machine system will be explained based on FIG.
issue) is performed (3011), this input/output command is not directly executed on the actual computer (also called host machine) 302, but generates an input/output command increments (3011).
21). The input/output command increments are real computer 30.
The report is sent to the 7M monitor (operating system for the virtual TT computer system) 303 running on the 7M monitor (operating system for the virtual TT computer system) 303 running on the VM monitor 303, and upon receiving this report, the VM monitor 303 verifies the input/output instructions of the virtual machine, and verifies the address of the channel program and input/output huffer. After the conversion, an input/output command is issued to the actual communication control device 304 to instruct execution of the channel program (3031).

The actual communication control device 304 that has been instructed to execute the channel program sends and receives messages to and from the terminal 306 via the line 305, and when the operation of the channel program is completed, an input/output end interrupt is sent to the 7M monitor 30 of the actual calculation 8302.
Reported on 3. In response, the VM monic 303
When it recognizes that the request is related to a message transmission/reception request from the GUESS l-03301, if input/output interrupts are possible for the GUESS) O3301, it converts the PSW and reports the input/output end event, and then interrupts the GUESS) O3301. Control is passed to the input/output end processing 3012 (3032).

[Problem that the invention seeks to solve]

In the line control method in the conventional virtual computer system described above, after an input/output command is executed by the line control management function of GUESSO3, the input/output command must be processed again by the line control management function of the VM monitor. , and regarding the input/output end interrupt from the actual communication control device, -dan VM
After the input/output end interrupt processing is performed by the monitor, the input/output interrupt processing must be performed again by the guest O8, that is, the two-step input/output command execution and the input/output end interrupt processing must be performed. The drawback was that execution performance deteriorated.

The present invention aims to solve these conventional drawbacks and improve the performance of line control in a virtual computer system.

[Means for solving problems]

In order to achieve the above object, the present invention provides a line control method for a virtual computer system that has a virtual memory management function using a segmentation method and operates multiple virtual computers running the same type of operating system on the same real computer. , comprising a sharing means for placing and sharing a line control unit in a system shared address space by the virtual memory management function of each operating system of the plurality of virtual machines, and the sharing means shares the line among the operating systems. The control unit includes a line management table and an input device that searches for a corresponding actual communication control device from the line management table and instructs the actual communication control device to sequentially execute the message sending and receiving requests for message sending and receiving requests issued from each of the operating systems. output command execution means; and a message transmission/reception request source that receives an input/output completion report from the actual communication control device when the operation of the actual communication control device ends, and is a notification destination of the input/output completion report based on the line management table. By providing an input/output completion notification means to notify the message transmission/reception requester of the completion of input/output, and centrally controlling all the real communication control devices connected to the real computer system, multiple virtual computers It has a configuration that centrally processes message sending/receiving requests from.

[Effect]

The line management unit, including the line management table, input/output command execution means, and input/output completion notification means, is located in the system shared address space and is shared by each operating system by the sharing means. execution and input/output termination processing.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram of an embodiment of the present invention. A virtual computer system 1 of this embodiment includes virtual computers α and β having a segmentation-based virtual storage management function, and is connected to a terminal 9 via a line 8. and an actual communication control device 6. Virtual machines α and β include operating systems 2 and 3 of the same type, respectively. Also,
Input/output command execution means 50. A line control unit 5 consisting of an input/output completion notification means 51 and a line management table 52 is placed in the system shared address space 7, and can be shared by the virtual machine α and the virtual machine β by the virtual memory management function sharing means 4. It is configured. Note that in this embodiment, there are two virtual machines (i.e., operating systems) running on the virtual machine system, but for a virtual machine system in which three or more virtual machines are realized on the same real machine, The present invention is also applicable.

In this embodiment, the virtual memory management function sharing means 4 uses a segmentation method to share the system between the operating systems 2 and 3 so that the line control unit 5 can be shared by the operating systems 2 and 3 on the virtual computer system 1. The line control unit 5 is positioned on the address space 7. Namely, the address space of the input/output command execution means, input/output completion notification means, and line management table created by operating system 2, and the input/output command execution means, input/output completion notification means, and line created by operating system 3. By keeping the address space of the management table the same, the line control unit 5 can be shared by the operating systems 2 and 3.

Such a sharable line control unit 5 accepts a message transmission/reception request 20 from the operating system 2 or a message transmission/reception request 30 from the operating system 3, and issues an input/output command to a designated actual communication control device M6. In addition, upon receiving a report of an input/output end interrupt from the actual communication control device 6, the message transmission/reception request 2
0 or the input/output results are reported in response to the message transmission/reception request 30.

FIG. 2 is a diagram showing an example of the configuration of the line management table 52.

The line management table 52 shows each actual communication vA (actual communication control device W).
It manages information regarding logical lines such as physical channels, logical line identification names, and start queues corresponding to the input/output command execution means 50. It is referenced by the input/output completion notification means 51.

In FIG. 1, when the input/output command execution means 50 receives a message transmission/reception request 20 from the operating system 2, for example, the input/output command execution means 50 also receives the logical line identification name in the channel program specified at the time of the request and the contents of the line management table 52. Then, it searches for a physical channel of the actual communication control device 6 that is to perform human output, queues the message transmission/reception request 20 in the start queue corresponding to that physical channel, and issues an input/output command on the corresponding physical channel. . Note that the hardware/firmware of the actual computer is the address of the channel program specified by the input/output command.

It converts the virtual address into a physical address and instructs the actual communication control device 6 to perform input/output operations.

When the input/output operation of the actual communication control device 6 is completed, control is passed to the input/output completion notifying means 51, and the control is passed to the input/output completion notification means 51 based on the line management table 52 from the physical channel in the input/output completion event message reported from the actual computer. The logical line is searched for, and the input/output result is notified to the message transmission/reception request 20 queued at the beginning of the start queue managed there.

FIG. 3 shows a virtual memory management function sharing means 4 which is a sharing means of the line control unit 5 placed on the system shared address space 7.
In the same figure, (Ji, Pi) attached to processes A and B of virtual machine α and processes X and Y of virtual machine β are the identification names of process i,
is the segment table display word string, 5TNi is the segment table number i, 5T-i is the segment table, STE i is the segment table description item number i, A-L B 1. X1. Y
-1 are unique segments of processes A, B, X, and Y, respectively; AB-1, XY-, -1 are shared segments of process A and process B, and process X and process Y, respectively;
S-1 is a system (all processes) shared segment. This system shared segment S-1 stores programs and the like that implement the line control unit 5 shown in FIG. Note that C in the segment table 5T-1 represents an attribute of a segment linked to the segment table, with C-00 representing a process-specific segment and C=01 representing a process group shared segment and C-11 representing a system shared segment.

In FIG. 3, processes A and B of the virtual machine α request message transmission and reception using the line control unit 5 existing in the system shared segment S-1. For this purpose, system shared segment S-1 is linked to segment table 5T-3 from the second entry in segment table display word string 5TWA-A linked by process A, and furthermore, this segment table 5T-3 (7 ) linked from the nth entry. Note that the n-th entry is defined as a system shared segment as a segment attribute. Similarly, for process B, k of segment table display word string 5TWA-B (segment table display word string 5TWA
- Segment table 5 from the entry (same value as k of A)
T-5 is linked.

On the other hand, processes X and Y of virtual computer β are also linked by process The segment table 5T-3 is linked to the k-th entry (same value as k in the segment table display word string 5TWA-A) of the segment table display word string 5TWA-X. Similarly, for process Y, segment table 5T-3 is linked from the kth entry of segment table display word string 5TWA-Y (same value as k to segment table display word string 5TWA-) linked by process Y. has been done.

〔Effect of the invention〕

As explained above, according to the present invention, by sharing the line control unit with multiple operating systems,
Since input/output commands can be executed and input/output termination processing can be performed in the - stage, there is an effect that the performance of line control in the virtual computer system can be improved.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is a diagram showing an example of the configuration of the line management table 52, FIG. 3 is an explanatory diagram of the virtual memory management function sharing means 4, and FIG. 4 is a conventional method. FIG. In the figure, 1... virtual computer system, 2... operating system of virtual computer α, 3... operating system of virtual computer β, 4... virtual memory management function sharing means, 5... line control Part, 6... Actual communication control device, 7... System shared address space, 8
... line, 9 ... terminal, 20.30 ... message transmission/reception request, 50 ... input/output command execution means, 51.
...I/O completion notification means, 52...Line management table.

Claims (1)

[Scope of Claims] A line control method for a virtual computer system in which a plurality of virtual machines having a virtual memory management function using a segmentation method and running the same type of operating system are operated on the same real computer, a sharing means for placing a line control unit in a system shared address space and sharing it by the virtual memory management function of each operating system of the computer; a management table; and input/output command execution means for determining a corresponding actual communication control device from the line management table for message transmission/reception requests issued from each of the operating systems, and instructing the actual communication control device to sequentially execute the message transmission/reception requests; , upon completion of the operation of the actual communication control device, receives an input/output completion report from the actual communication control device, determines the message transmission/reception request source to which the input/output completion report is notified based on the line management table, and sends the message. By providing an input/output completion notification means to notify the send/receive requester of the completion of input/output, and by centrally controlling all the real communication control devices connected to the real computer system, message sending/receiving requests from multiple virtual machines can be handled. A line control method in a virtual computer system that is characterized by centrally processing.