JPH01191234A - Communication system between virtual computers - Google Patents

Abstract

PURPOSE:To realize communication between OSs of virtual computers at a low cost and efficiently by constituting the title system so that the receiving side virtual computer reads data from a buffer means, based on an interruption. CONSTITUTION:A sending side virtual computer 1 outputs a command containing a data destination address, a transfer means 4 reads out data from the sending side virtual computer 1, based on the command and stores it in a buffer means 3, an interrupting means 5 generates an interruption in a receiving side virtual computer 2, when data of a necessary quantity has been stored in the buffer means 3, and the receiving side virtual computer 2 reads the data from the buffer means 3, based on the interruption. In such a way, the virtual computer 1 and the virtual computer 2 can execute easily communication through the buffer means 3.

Description

[Detailed Description of the Invention] C Summary] The present invention relates to a virtual computing machine communication method for transferring data between virtual machines, and provides a virtual computing machine communication method that realizes communication between O8s of virtual machines at low cost and efficiently. In data transmission and reception between a plurality of virtual computers installed on a real computer, the system includes a buffer means for storing data sent and received between the virtual computers, and a data destination address from the sending side virtual computer. a transfer means for reading data from the sending board computer based on a command and storing it in the buffer means; and when a required amount of data is stored in the buffer means by the transfer means, the data is specified by the data destination address. Interrupt means for generating an interrupt is provided in the receiving side board computer, and the receiving side board computer is configured to read data from the buffer means based on the interrupt.

[Industrial application field]

The present invention relates to a virtual machine communication method for transferring data between virtual machines.

In recent years, each user has created the necessary computer virtually on one real computer a (hereinafter referred to as the actual computer), and on this, the necessary operating system (hereinafter referred to as O
8) and programs so that they can be run, the requirements for a virtual computer system are met, in which each user can use the computer system independently from other users, just as if they were occupying hardware resources. It is becoming stronger not only for large computers but also for small computer systems. Therefore, communication between the OS of virtual machines can be done at low cost.
There is a need for a virtual computing institution communication system that can be implemented efficiently.

[Conventional technology]

FIG. 3 is a block diagram showing a conventional example. The same reference numerals indicate the same objects throughout the figures.

In order to realize the functions of the virtual computers on the real computer 50a, it is necessary for the virtual computers 1a and 2a to be able to operate independently.For this reason, conventionally, the O8 of each virtual computer was configured with hardware. communication in which data is transferred via a line in accordance with the line interface and protocol; h control devices 9a and 9b are controlled and connected to each other via a communication control device to perform communication.

[Problem to be solved by the invention]

As described above, the conventional method requires a communication control device to connect virtual machines, which poses a cost problem, especially in small computer systems.

An object of the present invention is to provide a virtual machine communication method that efficiently realizes communication between OSs of virtual machines at a low cost.

[Means to solve the problem]

FIG. 1 shows a block diagram of the principle of the present invention.

In the figure, 1 is a sending virtual computer, 2 is a receiving board computer, 3 is a buffer means for storing data sent and received between virtual computers 1 and 2, and 4 includes a data destination address from the sending virtual computer 1. Transfer means reads data from the sending virtual machine 1 based on a command and stores it in the buffer means 3; 5 is designated by a data destination address when the transfer means 4 stores the required amount of data in the panor means; This is an interrupt means that generates an interrupt to the receiving side board computer 2.

Therefore, the receiving board computer 2 is arranged to read data from the buffer means 3 on the basis of an interrupt.

[Effect]

According to the present invention, the sending virtual machine 1 outputs a command including a data destination address, and the transfer means 4 reads data from the sending virtual machine 1 based on the command and transfers the data to the buffer means 3.
The interrupt means 5 generates an interrupt to the receiving side board computer 2 when the required amount of data is stored in the buffer means, and the receiving side board computer 2 reads the data from the buffer means 3 based on the interrupt. Therefore, the virtual machine 1 and the virtual machine 2 can easily communicate via the buffer means 3.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to FIG. The same reference numerals indicate the same objects throughout the figures.

Components in FIG. 2 that correspond to those in FIG. 1 are surrounded by dashed lines.

FIG. 2 shows virtual communication mechanisms 10b and 20b according to the present invention that perform communication between virtual computers, both having the same configuration, but only the components related to the operation of the present invention are described.

The virtual computers 1b and 2b are virtual computers each provided with functions equivalent to resources such as a processing unit and an input/output device of the real computer 50b. show.

The buffers 3a and 3b are provided in predetermined areas of the main storage device (not shown) corresponding to the virtual machines 1b and 2b,
Temporarily stores data exchanged between the virtual machines 1b and 2a.

The intercept unit 4a determines the destination address by taking in data including a destination address and an input/output command output from the virtual computer 1b to a communication control device (not shown), and determines the destination address, and determines the destination address for any virtual computer in the real computer 50b. If so, interpret the command, read data from the virtual machine 1b according to the command, store it in the buffer 3a, and send the data to the buffer 3a.
When a predetermined amount of data or an amount of data specified by a command is stored in a, and if the buffer 3b is empty, the contents of the buffer 3a are transferred to the buffer 3b, and an interrupt activation unit 5a, which will be described later, is notified, and if necessary, The next data is stored from the virtual machine 1b into the buffer 3a.

The interrupt starting unit 5a issues an interrupt request to the later-described interrupt generating unit 5b of the virtual machine (virtual machine 2b in this case) that is the data transmission destination specified by the destination address.

The interrupt generation unit 5b generates an interrupt similar to that of the communication control device to O8 of the virtual machine 2b.

Therefore, ■The virtual machine 1b outputs a destination address and a command to access the communication control device or another virtual computer, and ■The intercept unit 4a determines the destination address, and if it is not between any virtual computers, the and the command are output as they are to the communication control device, and (2) if the destination address belongs to any virtual machine, the data is transferred to the buffer 3a according to the command. (2) If the buffer 3b is empty, move the contents of the buffer 3a to the buffer 3b. (2) The interrupt activation unit 5a activates the interrupt generation unit 5b of the destination virtual machine 2b. ■The interrupt generation unit 5b is the virtual computer 2
Make an interrupt request to b. ■Virtual computer 2b is buffer 3b
It is configured to read the contents by moving them to a predetermined storage area.

〔Effect of the invention〕

As explained above, according to the present invention, when viewed from the virtual machines 1b and 2b, the virtual communication mechanisms 10b and 20b can be treated logically in the same way as a general communication control device, and the intercepting unit 4a, The interrupt starting unit 5a and the interrupt generating unit 5b can be easily realized by software or firmware, and the data can be transferred to the buffer 3a and the buffer provided on the main storage device without following complicated transmission procedures of communication lines. Since the information is transferred between the virtual machines 3b and 3b, there is an effect that communication between virtual machines can be performed efficiently and at low cost.

BRIEF DESCRIPTION OF THE 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 block diagram of a conventional example. In the figure, 1.1a, 1b, 2.2a, 2b are virtual computers, 3 is a buffer means, 3a, 3b is a buffer, 4 is a transfer means,
4a is an intercept section, 5 is an interrupt means, 5a is an interrupt activation section, 5b is an interrupt generation section, 9a, 9
10a and 20b are virtual communication mechanisms, and 50a and 50b are real computers. Kyōchi≦Sotsuki no QJ'tFron 2 Figure I
2 mouths

Claims (1)

[Claims] In transmitting and receiving data between a plurality of virtual machines (1, 2) provided on a real computer, a buffer means (3) for storing data transmitted and received between the virtual machines (1, 2). and a transfer means for reading data from the sending board computer (1) and storing it in the buffer means (3) based on a command including a data destination address from the sending board computer (1).
4) and an interrupt that generates an interrupt to the receiving board computer (2) specified by the data destination address when the required amount of data is stored in the buffer means (3) by the transfer means (4). means (5), and the receiving side board computer (2) reads data from the buffer means (3) based on the interrupt.