JP3048941B2 - Method and apparatus for realizing virtual display adapter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for realizing a virtual display adapter on a virtual machine in an operating system providing a virtual machine environment.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram showing an example of a conventional virtual display adapter realizing apparatus.

In a conventional operating system for providing a virtual machine environment, a means for realizing a virtual display adapter on a virtual machine has performed all functions of the display adapter by software emulation.

That is, as shown in FIG. 4, a virtual display adapter realizing device includes a display device 11 for an extended display adapter and a virtual display adapter realizing unit 1.
3 and an application 18 operating on the virtual machine. The virtual display adapter realizing unit 13 performs a virtualization process for performing software emulation when a screen is drawn from the application 18 on the virtual machine. A drawing unit 15 that stores a drawing image of the software emulation performed by the virtualization processing unit 17, a drawing unit 15 that draws the drawing image of the storage unit 16 on the display device 11, a drawing unit 15, and a storage unit 16 and a control unit 14 for controlling the operation of the virtualization processing unit 17. In addition to the above, the display device 12 of the standard display adapter is also provided, but this does not contribute to the realization means of the virtual display adapter at all.

In the thus configured virtual display adapter realizing apparatus, when the virtual machine is started, drawing from the application 18 on the virtual machine is performed to the virtualization processing unit 17 and the virtualization processing unit 17 Performs software emulation. Virtualization processing unit 1
The drawing image as a result of the software emulation by 7 is stored in the storage unit 16, and the drawing unit 15 draws it on the display device 11 of the extended display adapter.

[0006] Such a virtual display adapter realizing means requires a high level of technology for emulating the display adapter by software, and also requires consideration of performance improvement. Therefore, it takes a lot of development time to develop software emulation. Need. Also,
Emulation of a display adapter by software requires extremely complicated processing and redundant processing. Therefore, when a virtual display adapter is realized, its performance is significantly reduced. Furthermore, some functions of the display adapter cannot be realized because there are special functions that cannot be realized by software alone, or the available performance cannot be maintained even though emulation by software is possible. There is also.

[0007]

As described above, the conventional means for realizing a virtual display adapter on a virtual machine requires a high level of technology for emulating the display adapter by software, and also considers performance improvement. Therefore, there is a problem that it takes a lot of development time to realize a virtual display adapter by software emulation of the display adapter.

[0008] In addition, emulation of a display adapter by software requires extremely complicated processing and redundant processing. Therefore, when a virtual display adapter is realized, the performance of the virtual display adapter is significantly reduced.

Furthermore, there are special functions that cannot be realized by software alone, and there are cases where emulation by software is possible, but the available performance cannot be maintained. There is also a problem that it may not be realized.

An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional means for realizing a virtual display adapter, shorten development time, prevent performance degradation, and provide all functions as a display adapter. A means for realizing such a virtual display adapter on a virtual machine is to provide a virtual machine environment.

[0011]

SUMMARY OF THE INVENTION Conventional computer systems are equipped with a low-level display adapter (standard display adapter) that is sufficient for standalone use. Current computer systems are equipped with the above-mentioned standard display adapter as standard in order to maintain compatibility with the conventional computer system, and are also required to display advanced operating systems such as GUIs. It also has a standard display adapter (extended display adapter). For this reason, current computer systems use a standard display adapter at the time of startup, but the operating system uses only an extended display adapter and does not use a standard display adapter.

The virtual display adapter realizing method and realizing apparatus of the present invention realize a virtual display adapter by using a standard display adapter not used by the operating system.

That is, according to the virtual display adapter realizing method of the present invention, when a virtual machine is started, a display device of a standard display adapter is assigned to the virtual machine as a virtual display, and drawing is performed by an application after the virtual machine is started. Is performed on the display device of the standard display adapter, and the virtual display adapter realizing unit periodically checks the drawing on the display device of the standard display adapter,
When drawing is being performed, the drawing unit of the virtual display adapter realizing unit acquires the screen of the virtual machine from the display device of the standard display adapter and draws it on the display device of the extended display adapter, and When the above operation is completed, the assignment of the display device of the standard display adapter to the virtual machine is released.

The virtual display adapter realizing device of the present invention comprises a display device of an extended display adapter, a display device of a standard display adapter, and a virtual machine screen drawn on the display device of the standard display adapter. A rendering unit that renders on a display device and a virtual display adapter realizing unit that has a control unit that controls the operation of the rendering unit; and an application that runs on the virtual machine and renders on the display device of the standard display adapter. When the virtual machine is started, the display device of the standard display adapter is allocated to the virtual machine as a virtual display, and all drawing by the application after the start of the virtual machine is performed on the display device of the standard display adapter. The virtual display adapter realizing unit periodically checks the drawing of the standard display adapter on the display device, and when the drawing is being performed, displays the standard display adapter by the drawing unit of the virtual display adapter realizing unit. Obtain the screen of the virtual machine from the device, draw it on the display device of the extended display adapter, and when the operation of the virtual machine ends, release the allocation of the display device of the standard display adapter to the virtual machine. That is to say.

[0015]

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

FIG. 1 is a block diagram showing an embodiment of the virtual display adapter realizing apparatus of the present invention, FIG. 2 is a flowchart showing the operation of the embodiment of FIG. 1, and FIG. 3 is a characteristic showing the performance of the embodiment of FIG. FIG.

The virtual display adapter realizing device shown in FIG. 1 comprises a display device 1 for an extended display adapter, a display device 2 for a standard display adapter, a virtual display adapter realizing section 3, and an application 6 running on a virtual machine. The virtual display adapter realizing unit 3 includes a drawing unit 5 that draws a virtual machine screen drawn on the display device 2 on the display device 1, and a control unit 4 that controls the operation of the drawing unit 5. ing.

Next, the operation of the virtual display adapter realizing apparatus configured as described above will be described with reference to FIG.

When the virtual machine is started, the display device 2 of the standard display adapter is assigned to the virtual machine as a virtual display (step 21). As a result, all drawing from the application 6 on the virtual machine is performed directly on the display device 2, and emulation by software of the virtual display adapter is not performed. Therefore, the virtual display adapter realizing section 3 does not need a virtual processing section or a storage section.

After the start of the virtual machine, drawing on the display device 2 by the application 6 is periodically checked by the virtual display adapter realizing section 3 (steps 22 and 23). The screen of the virtual machine on the display device 2 is acquired by the unit 5 (step 24), and is drawn on the display device 1 of the extended display adapter (step 25).
This drawing check and the drawing processing on the display device 1 are the same as the processing operations of the conventional virtual display adapter realizing apparatus, and therefore the conventional processing procedure can be used as it is.

Thereafter, the above operation is repeated until the operation of the virtual machine ends, and when the operation of the virtual machine ends, the assignment of the display device 2 of the standard display adapter to the virtual machine is released (step 26).

FIG. 3 is a characteristic diagram showing the performance of the embodiment of FIG. 1, and shows the processing time of various drawing operations in a bar graph in comparison with the case of the conventional software emulation.

In FIG. 3, a case 31 shows the processing time for each of the painting 41, the circle drawing 42, the rectangle drawing 43, the line drawing 44, the point drawing 45, and the screen clear 46 according to the embodiment of FIG. 4 shows respective processing times by software emulation in the conventional virtual display adapter realizing device shown in FIG.

As is apparent from FIG. 3, the processing time of the case 31 is equal to the processing time of the case 32 in all cases of the painting 41, the circle drawing 42, the rectangle drawing 43, the line drawing 44, the point drawing 45, and the screen clear 46. The time is less than half of the time, and in particular, in the case of the circle drawing 42, the rectangular drawing 43, and the screen clear 46, it is a fraction of the time.

As described above, the software emulation is performed by using the display device of the standard display adapter as the display device of the virtual display adapter in the virtual machine environment, and performing drawing directly by the application on the display device. Since there is no need, the development time of software for emulation can be eliminated, and thus the overall development time can be reduced.
In addition, it is possible to realize a virtual display adapter which can prevent performance degradation and has no functional restrictions. Further, the virtual display adapter realizing unit does not require the virtual processing unit and the storage unit.

[0026]

As described above, the virtual display adapter realizing method and realizing apparatus of the present invention utilize a standard display adapter display device as a virtual display adapter display device in a virtual machine environment. By drawing directly on the display device of the standard display adapter and drawing it on the display device of the extended display adapter, it is possible to emulate virtual display adapters that require a lot of development time. This eliminates the need for software development, which has the effect of reducing the overall development time.

Further, since a virtual display adapter can be realized without emulating a display adapter by software that requires extremely complicated processing or redundant processing, there is also an effect that performance by software emulation can be prevented.

Furthermore, since the display device of the standard display adapter, which is hardware, is used, there is an effect that all functions of the display adapter can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a virtual display adapter realizing device of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment of FIG.

FIG. 3 is a characteristic diagram showing performance of the embodiment of FIG. 1;

FIG. 4 is a block diagram showing an example of a conventional virtual display adapter realizing device.

[Explanation of symbols]

 1.2.11.12 Display device 3.13 Virtual display adapter realizing unit 4.14 Control unit 5.15 Drawing unit 6.18 Application 16 Storage unit 17 Virtualization processing unit 21-26 Step 31.32 Case 41 Filling 42 Circle drawing 43 Rectangular drawing 44 Line drawing 45 Point drawing 46 Screen clear

Claims (3)

(57) [Claims] When a virtual machine is started, a display device of a standard display adapter is assigned to the virtual machine as a virtual display, and all drawing by an application after the start of the virtual machine is performed on the display device of the standard display adapter. The display of the standard display adapter is periodically checked by the virtual display adapter realizing unit by the virtual display adapter realizing unit, and if the drawing is being performed, the drawing of the standard display adapter is performed by the virtual display adapter realizing unit. Acquiring the screen of the virtual machine from the display device and drawing it on the display device of the extended display adapter, and when the operation of the virtual machine ends, deallocating the display device of the standard display adapter to the virtual machine. Including A method for realizing a virtual display adapter. 2. A display device for an extended display adapter, a display device for a standard display adapter, a drawing unit for drawing a virtual machine screen drawn on the display device for the standard display adapter on the display device for the extended display adapter, and A virtual display, comprising: a virtual display adapter realizing unit having a control unit for controlling the operation of the drawing unit; and an application operating on the virtual machine and drawing on a display device of the standard display adapter. Adapter realization device. 3. A display unit for an extended display adapter, a display unit for a standard display adapter, a drawing unit for drawing a virtual machine screen drawn on the display unit for the standard display adapter on the display unit for the extended display adapter, and A virtual display adapter realizing unit having a control unit that controls the operation of the drawing unit, and an application that runs on the virtual machine and draws on the display device of the standard display adapter,
When the virtual machine is started, the display device of the standard display adapter is assigned to the virtual machine as a virtual display, and all drawing by the application after the start of the virtual machine is performed on the display device of the standard display adapter. The virtual display adapter realizing unit periodically checks the drawing of the standard display adapter on the display device, and when the drawing is being performed, the drawing unit of the virtual display adapter realizing unit displays the display device of the standard display adapter. From the virtual machine, draws it on the display device of the extended display adapter, and when the operation of the virtual machine ends, deallocates the display device of the standard display adapter to the virtual machine. Virtual display adapter implementation device which comprises a Rukoto.