WO2018103022A1 - Method and apparatus for achieving frame buffering, electronic device and computer program product - Google Patents

Abstract

Provided in the present invention are a method and an apparatus for achieving frame buffering, an electronic device and a computer program product. The method comprises: determining that a physical frame buffer address corresponding to a display device is mapped to a virtual address of a user space; and in response to a request of a client for acquiring a storage area address corresponding to a virtual frame buffer address thereof, allocating the virtual address to the client, so that the client establishes a mapping relationship between the virtual frame buffer address of the client and the virtual address. By establishing a mapping relationship between the virtual frame buffer address of a client and the virtual address of a real physical frame buffer in a user space, the present invention can send display data running on the client operating system of the client, on the basis of the address mapping relationship, to the physical frame buffer, without the need to allocate a physical storage area to the virtual frame buffer, also eliminating the time and process necessary for copying between storage areas, and therefore the present invention can reduce the occupancy of the main operation system resources and storage resources, improve the performance of the virtualized system, and shorten the execution time needed for the client operation system to display operations.

Description

Frame buffer implementation method, device, electronic device and computer program product Technical field

The present invention relates to the field of virtualization technologies, and in particular, to a frame buffer implementation method, apparatus, electronic device, and computer program product.

Background technique

Frame Buffer is an interface provided by the Linux system for display devices. It will display the buffer abstraction and shield the underlying differences of the image hardware, allowing the upper application to directly read and write the display buffer in graphics mode. The related operations are all done by the frame buffer driver, so that the user does not have to care about the specific address and storage mode of the physical display buffer.

Figure 1 shows a schematic diagram of a virtualized system architecture in which multiple Linux operating systems (or operating systems similar to the Linux operating system, such as the Android operating system) can be run, including a host operating system (host OS). And one or more guest operating systems (guest OS), the main operating system running on the host machine, running one or more guest virtual machines, ie clients, on the host operating system, and each client as an application of the main operating system Run, which simulates a hardware device for the guest operating system running on the client for use by the guest operating system, and runs various applications in the guest operating system running on each client. Based on the virtualized system architecture, CPUs, memory, and input and output devices provided by hardware devices can be shared among multiple operating systems.

In the prior art, the client operating system invokes the frame buffer by implementing a virtual frame cache for the client running by the guest operating system, and running the virtual frame cache driver in the kernel layer of the client running by the guest operating system. Allocating an actual storage area for the virtual frame buffer to store display pixels of the guest operating system, the storage area mapping its address space to the host user plane to obtain a virtual address, so that the client can cache the virtual frame corresponding to the address through the address mapping The virtual frame cache storage area operates. When the guest operating system displays, the client copies the content in the storage area corresponding to the virtual frame buffer to the storage area corresponding to the real frame buffer for display.

The physical storage area is allocated to the virtual frame cache, and the content in the virtual frame cache physical storage area is copied to the storage area corresponding to the real frame buffer, which occupies a large amount of main operating system resources and storage resources. The performance of the virtualization system is degraded, and the guest operating system shows that the operation takes a long time to execute.

Summary of the invention

The embodiment of the invention provides a frame buffer implementation method, device, electronic device and computer program product, which are mainly used to solve the problem that the performance of the virtualization system is reduced and the execution time of the client operating system is long.

In one aspect, an embodiment of the present invention provides a virtual frame buffer implementation method, where the method includes:

Determining that the physical frame cache address corresponding to the display device is mapped to the virtual address of the user space;

Responding to a request by the client to obtain a storage area address corresponding to its virtual frame buffer address, assigning the virtual address to a client, such that the client establishes a virtual frame buffer address of the client and the virtual address Mapping relations.

In another aspect, an embodiment of the present invention provides a virtual frame buffer implementation apparatus, where the apparatus includes:

a determining module, configured to determine that a physical frame cache address corresponding to the display device is mapped to a virtual address of the user space;

An address allocation module, configured to allocate the virtual address to a client in response to a request by the client to obtain a storage area address corresponding to a virtual frame buffer address thereof, so that the client establishes a virtual frame cache address of the client A mapping relationship with the virtual address.

In another aspect, an embodiment of the present invention provides an electronic device, including: a display device, a memory, one or more processors; and one or more modules, the one or more The modules are stored in the memory and are configured to be executed by the one or more processors, the one or more modules including instructions for performing the various steps of any of the above methods.

In another aspect, embodiments of the present invention provide a computer program product for use with an electronic device including a display device, the computer program product comprising a computer readable storage medium and a computer program mechanism embedded therein The computer program mechanism includes instructions for performing the various steps of any of the above methods.

The beneficial effects of the embodiments of the present invention are as follows:

The embodiment of the present invention establishes a mapping relationship between a virtual frame cache address in a client and a virtual address cache of a real physical frame in a user space, and can send display data of a guest operating system running on the client to a physical frame based on an address mapping relationship. Cache, no need to allocate physical storage area for virtual frame cache, and also saves the time and process of copying between storage areas, thus reducing the occupation of main operating system resources and storage resources, improving the performance of virtualized systems, and shortening the display operation of guest operating systems. execution time.

DRAWINGS

Specific embodiments of the present invention will be described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram showing the architecture of a virtualization system in the prior art;

2 is a schematic structural diagram of a virtualization system applied to a frame buffer implementation method according to Embodiment 1 of the present invention;

FIG. 3 is a schematic flowchart diagram of a method for implementing a frame buffer according to Embodiment 1 of the present invention;

4 is a schematic structural diagram of a device for implementing a frame buffer in Embodiment 2 of the present invention;

FIG. 5 is a schematic structural diagram of an electronic device in Embodiment 3 of the present application.

detailed description

The embodiments of the present invention are further described in detail with reference to the accompanying drawings, in which FIG. An exhaustive example. And in the case of no conflict, the features in the embodiments and the embodiments in the description can be combined with each other.

The inventor noticed during the invention that the existing side of the frame buffer was implemented in the virtualized system architecture. The physical storage area needs to be allocated for the virtual frame cache, and when the content needs to be displayed, the content in the physical storage area of the virtual frame cache is copied to the storage area corresponding to the real frame buffer, which occupies a large amount of main operating system resources and storage resources. As a result, the performance of the virtualization system is degraded, and the guest operating system displays an operation execution time.

In view of the above-mentioned deficiencies, the present invention provides a frame buffer implementation method, which establishes a mapping relationship between a virtual frame cache address in a client and a virtual address cache of a real physical frame in a user space, and can operate a guest operating system running on the client. The display data is sent to the physical frame buffer based on the address mapping relationship, and the physical storage area is not allocated for the virtual frame buffer, and the time and process of copying between the storage areas are omitted, thereby reducing the occupation of the main operating system resources and storage resources, and improving Virtualize system performance and reduce the execution time of guest operating system display operations.

In order to facilitate the implementation of the present invention, the following description will be made by way of examples.

Embodiment 1:

FIG. 2 is a schematic diagram of a virtualized system architecture applied to a frame buffer implementation method according to Embodiment 1 of the present invention. A virtual cache driver is run in a kernel layer of a guest operating system running on a client to implement a virtual cache of a client.

FIG. 3 is a schematic flowchart of a method for implementing a frame buffer according to Embodiment 1 of the present invention. As shown in FIG. 3, the method for implementing a frame buffer includes:

Step 101: Determine that a physical frame cache address corresponding to the display device is mapped to a virtual address of the user space.

Step 102: In response to the client obtaining a request for a storage area address corresponding to the virtual frame buffer address, assigning the virtual address to the client, so that the client establishes the virtual frame cache address of the client and the The mapping relationship of virtual addresses.

In the step 101, because the hardware device in the virtualization architecture cannot be directly accessed, the correspondence between the physical space of the device and the virtual address in the user space is usually established, so that the physical address of the device directly accessed by the user space can be realized through the memory mapping. . A physical display device usually corresponds to a physical frame cache storage area, and the display device can directly read the display in the physical frame cache storage area. Display data for display. The address space of the physical frame cache storage area is mapped to a virtual address space in the host space of the host, so that any address in the address space of the physical frame cache storage area can be mapped to a virtual address on the user plane.

In this embodiment, first, the physical frame cache address space corresponding to the display device in the virtualization system architecture is mapped to the virtual address space after the user space, and when determining the mapping relationship, one of the addresses (for example, the first address) may also be determined. The mapping relationship in turn obtains the mapping relationship of the address space.

In step 102, the virtual frame buffer in the client also needs address mapping to determine its corresponding storage space. When the client requests to obtain the storage area address corresponding to the virtual frame buffer address, the physical frame determined in step 101 above is determined. The virtual address mapped to the user space by the cache address is provided to the client so that the client maps its virtual frame buffer address space to the virtual address space described above, thereby mapping to the address space of the physical frame cache storage area.

After the client establishes a mapping relationship between the virtual frame cache address of the client and the virtual address, when the virtual frame cache driver receives an operation instruction of the guest operating system to the virtual frame cache address, the virtual frame cache address and the The mapping relationship between the virtual address and the physical address cache address is such that the operation instruction directly points to the physical frame cache, so that the client operating system of the client can directly operate on the physical frame buffer. When displayed, the guest operating system can directly write display data directly to the physical frame buffer without having to copy it.

In some embodiments, when the client is started, in response to a request by the client to obtain a memory area address corresponding to its virtual frame buffer address, the virtual address is assigned to the client to cause the client to establish A mapping relationship between a virtual frame buffer address of the client and the virtual address.

The above step 102 can occur at the time of client startup. When the client starts, the virtual frame cache driver in the client first obtains the physical frame buffer parameter by operating the physical frame buffer driver in the host operating system, and the physical frame is buffered in the storage area, or is long. The width, and the supported data format, etc., the virtual frame buffer driver determines or calculates the actual storage space size of the physical frame buffer according to the physical frame buffer parameter. After the command started in the guest operating system In the row, the contiguous memory allocator reserves a memory space that is twice the size of the physical frame buffer, and sets the starting address of the contiguous memory allocator to the idle address of the system, wherein the virtual frame buffer address space is allocated during the process. The starting address is aligned according to the page table requirements of the guest operating system kernel, and the address space reserved after the starting address is idle.

After determining the virtual frame buffer address, the virtual frame buffer address is transmitted to the client by setting a base address setting register provided by the virtual frame buffer, so that the client can map the physical frame buffer address to the physical frame buffer address after obtaining the virtual frame buffer address. The virtual address of the user space is then mapped.

In some embodiments, when the guest operating system running on the client operates the virtual frame buffer, and the operating system is an operating system running in the foreground, an operation instruction is sent to the physical frame buffer, And return the information of the successful operation to the guest operating system.

If multiple clients are running in the virtualization system architecture and each client runs its own guest operating system, there may be one guest operating system running in the foreground and other guest operating systems running in the background or in the shutdown state. Each client can sense whether the current guest operating system is in the foreground running state. Only when the guest operating system of a certain client runs in the foreground, the virtual frame cache driver will execute the operation instruction of the guest operating system to cache the virtual frame. Is delivered to the physical frame buffer according to the address mapping relationship. For example, only when a guest operating system of a client is running in the foreground, the virtual frame buffer driver of the client can write the pixels to be displayed into the physical frame buffer, and can feedback the operation to the guest operating system after the writing is completed. The successful return value.

In some embodiments, when the guest operating system running on the client operates the virtual frame buffer, and the operating system is an operating system running in the background, the operation instruction is not sent to the physical frame cache. And return information about the successful operation to the guest operating system.

If multiple clients are running in the virtualized system architecture and the guest operating system of one of the clients is running in the background, the guest operating system or the application running on it may still initiate a frame buffer operation to the virtual frame cache. At this time, the operation instruction of the virtual operating system cached by the guest operating system is not sent to the physical frame cache according to the address mapping relationship, but the information of the successful operation is directly returned to the guest operating system. In this embodiment, the virtual frame buffer driving simulation operation is successfully performed, but actually The corresponding operation is not performed to avoid affecting the display of the operating system running in the foreground that currently occupies the physical frame buffer.

In some embodiments, an operational instruction is issued to the physical frame buffer by setting a register of the virtual frame buffer. The register of the virtual frame buffer corresponds to a register of the physical frame buffer, and generally includes a plurality of sets of registers related to parameters, operations, addresses, or controls of the virtual frame buffer. For example, the frame buffer register can include the following groups/groups:

1) Property register

Setting a virtual frame buffer attribute register for the virtual frame buffer driver, and setting a physical frame buffer attribute register for the physical frame buffer driver, both of which store physical frame buffer parameters, wherein the physical frame buffer in the virtual frame buffer's attribute register The parameters can be obtained by the virtual frame buffer driver reading the data of the property register of the physical frame buffer when the client starts. The physical frame buffer parameter may be information such as length, width, and supported data format of the physical frame buffered in the storage device. The guest operating system can read the property register to get the physical frame buffer parameters.

When the guest operating system running by the current station reads the frame buffer parameter, the guest operating system can automatically read the parameters of the virtual frame buffer, that is, the physical frame buffer parameter, through the virtual frame buffer. When the guest operating system running in the background reads the frame buffer parameter, one case is that the guest operating system can no longer read the parameters of the virtual frame buffer normally through the virtual frame buffer, and only obtains the information of successful reading; another case The attribute register of the physical frame buffer has synchronized its data to the attribute register of the virtual frame buffer, and the frame buffer parameter is usually read-only and does not change, in which case even if the guest operating system is running in the background, The property register of the virtual frame buffer can be read normally to obtain the physical frame buffer parameters.

2) Address register

An address register for the virtual frame buffer is set for the virtual frame buffer driver for storing the virtual frame buffer address. When the client starts, the virtual frame cache driver can obtain the virtual frame buffer address through the contiguous memory allocator and then pass the address to the client by setting the address setting register of the virtual frame buffer. The same physical frame buffer driver is provided with an address register of the physical frame buffer for storing physical frame buffers. The storage address is mapped to the virtual address of the user space. The virtual frame buffer driver can obtain the virtual address from an address register of the physical frame buffer to establish a mapping relationship.

When the application running in the guest operating system running in the current station needs to display related content, the virtual frame buffer address in the virtual frame buffer address register can be read, and the display data is written into the virtual frame buffer.

3) Interrupt register

An interrupt register for setting a physical frame buffer for the physical frame buffer driver, configured to store interrupt information of the physical frame buffer, where the interrupt information may include information such as an interrupt enable and an interrupt state, which are respectively stored by an interrupt enable register and an interrupt status register. The interrupt register can provide an operation result of a physical frame buffer device or other asynchronous event or the like. An interrupt register that also sets a virtual frame buffer for the virtual frame buffer driver is used to store the interrupt information obtained by the physical frame buffer's broken register. When the interrupt information in the interrupt register of the physical frame buffer changes, it can be updated to the interrupt register of the virtual frame buffer in each client. When the virtual frame buffer driver obtains a frame buffer operation request initiated by the guest operating system running in the foreground, the physical frame buffer interrupt information stored in the interrupt register of the virtual frame buffer may be used to determine whether the current physical frame buffer can perform related operations, and when the judgment allows In operation, an operation instruction is issued to the physical frame buffer.

In the foregoing various implementation manners, whether the guest operating system is in the foreground running state determines whether it can perform some operations on the real physical frame buffer based on the mapping relationship between the virtual frame buffer address and the physical frame cache address. Usually only one operating system (main operating system or a guest operating system) runs in the foreground at a time, and only the frame buffer operation initiated by the operating system can be completely executed, while other client operating systems running in the background The frame buffer operation initiated by the virtual frame buffer of the client also returns the return value of the successful operation, and will not report an error or affect the display of the foreground operating system.

In some embodiments, the method further includes: acquiring a physical frame buffer parameter of the physical frame buffer; and providing the physical frame buffer parameter when receiving a frame buffer parameter query request of a guest operating system running in the client.

In a specific implementation, the frame buffer parameter in the attribute register of the physical frame buffer may be synchronized to the attribute register of the virtual frame buffer when the client establishes a mapping relationship between the virtual frame buffer address of the client and the virtual address. The frame buffer parameter is usually read-only and does not change, so it can be set that the operating system running in the foreground or the background in the client can read the frame buffer parameter in the attribute register of the virtual frame buffer to obtain the physical frame buffer. The parameter, in turn, is capable of transmitting display data that meets the parameter requirements to the virtual frame buffer.

In this embodiment, the mapping relationship between the virtual frame cache address in the client and the virtual address of the real physical frame cache in the user space is established, and the display data of the guest operating system running on the client can be sent to the physical frame based on the address mapping relationship. Cache, no need to allocate physical storage area for virtual frame cache, and also saves the time and process of copying between storage areas, thus reducing the occupation of main operating system resources and storage resources, improving the performance of virtualized systems, and shortening the display operation of guest operating systems. execution time. The embodiment further discloses that the virtual frame cache address mapping relationship can be established in time during the client startup process; the frame cache implementation manner of the guest operating system running in the foreground or in the background is separately disclosed, and the physical frame buffer is set based on the frame buffer register setting. The operation method ensures that the guest operating system running in the foreground can call the physical frame cache normally, and the operating system running in the background can still read the physical frame cache parameter, but does not affect the current operating system cache operation of the operating system in the foreground. At the same time, the physical frame buffer parameters can be provided to the virtual frame buffer driver so that the guest operating system can conform to the frame buffer parameter requirements when initiating the frame buffer operation.

Embodiment 2:

Based on the same inventive concept, a frame buffer implementation apparatus is also provided in the embodiment of the present invention. Since the principle of solving the problem is similar to the frame buffer implementation method, the implementation of these devices can refer to the implementation of the method, and the repetition is no longer Narration. As shown in FIG. 4, the frame buffer implementation apparatus 200 includes: a determining module 201, configured to determine a physical frame cache address corresponding to the display device to be mapped to a virtual address of the user space; and an address allocation module 202, configured to receive the client in response to the client A request for a storage area address corresponding to the virtual frame buffer address, the virtual address is allocated to the client, so that the client establishes a mapping relationship between the virtual frame cache address of the client and the virtual address.

In some embodiments, the address allocation module 202 is specifically configured to allocate the virtual address to the client in response to the client requesting the storage area address corresponding to the virtual frame cache address when the client is started. And causing the client to establish a mapping relationship between the virtual frame cache address of the client and the virtual address.

In some embodiments, the apparatus further includes: an operation module 203, configured to allocate the virtual address to the address allocation module 202 in response to a request by the client to obtain a storage area address corresponding to a virtual frame buffer address thereof a client, after the client establishes a mapping relationship between the virtual frame cache address of the client and the virtual address:

When the guest operating system running on the client operates the virtual frame cache, and the operating system is an operating system running in the foreground, an operation instruction is sent to the physical frame cache, and is returned to the guest operating system. The operation succeeds. When the guest operating system running on the client operates the virtual frame cache, and the operating system is an operating system running in the background, the operation instruction is not allowed to be sent to the physical frame cache. And return information about the successful operation to the guest operating system.

In some embodiments, the operation module 203 is specifically configured to allocate the virtual address to the client in response to the request by the address allocation module 202 to obtain a storage area address corresponding to the virtual frame cache address thereof. After the client establishes a mapping relationship between the virtual frame cache address of the client and the virtual address, when the guest operating system running on the client operates the virtual frame cache, and the operation When the system is an operating system running in the foreground, an operation instruction is sent to the physical frame cache by setting a register of the virtual frame buffer, and information indicating that the operation is successful is returned to the guest operating system.

In some embodiments, the address allocation module 202 is further configured to acquire a physical frame cache parameter of the physical frame cache; the operation module 203 is further configured to: when receiving a guest operating system running on the client The physical frame buffer parameter is provided when the frame buffer parameter queries the request.

Embodiment 3:

Based on the same inventive concept, an embodiment of the present invention further provides an electronic device due to its original The implementation is similar to the frame buffer implementation, so the implementation can refer to the implementation of the method, and the repeated description will not be repeated. As shown in FIG. 5, the electronic device 300 includes: a display device 301, a memory 302, one or more processors 303; and one or more modules, the one or more modules being stored in the memory, And being configured to be executed by the one or more processors, the one or more modules comprising instructions for performing the various steps of any of the above methods.

In this embodiment, the electronic device may be a mobile phone, a tablet computer, a robot, or other smart device.

Embodiment 4:

Based on the same inventive concept, an embodiment of the present invention further provides a frame buffer implementation computer program product for use in combination with an electronic device including a display device. Since the principle is similar to the frame buffer implementation method, the implementation may refer to the implementation of the method. The repetitions are not repeated here. The computer program product comprises a computer readable storage medium and a computer program mechanism embodied therein, the computer program mechanism comprising instructions for performing the various steps of any of the foregoing methods.

For the convenience of description, the various parts of the above-described apparatus are separately described by functions into various modules. Of course, the functions of the various modules or units may be implemented in one or more software or hardware in the practice of the invention.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, a special purpose computer, an embedded processor, or other programmable data processing device to produce a machine that enables Instructions executed by a processor of a computer or other programmable data processing device generate means for implementing the functions specified in one or more blocks of the flowchart or in a block or blocks of the flowchart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

Claims (12)

A frame buffer implementation method, the method comprising: Determining that the physical frame cache address corresponding to the display device is mapped to the virtual address of the user space; Responding to a request by the client to obtain a storage area address corresponding to its virtual frame buffer address, assigning the virtual address to a client, such that the client establishes a virtual frame buffer address of the client and the virtual address Mapping relations. The method of claim 1 wherein said virtual address is assigned to a client in response to a request by a client to obtain a memory area address corresponding to its virtual frame buffer address for said client to establish The mapping relationship between the virtual frame cache address of the client and the virtual address includes: When the client is started, in response to a request by the client to obtain a storage area address corresponding to its virtual frame buffer address, the virtual address is assigned to the client to cause the client to establish a virtual frame of the client The mapping relationship between the cache address and the virtual address. The method of claim 1 wherein said virtual address is assigned to a client in response to a request by the client to obtain a memory area address corresponding to its virtual frame buffer address to cause said client After the mapping between the virtual frame cache address of the client and the virtual address is established, the method further includes: When the guest operating system running on the client operates the virtual frame cache, and the operating system is an operating system running in the foreground, an operation instruction is sent to the physical frame cache, and is returned to the guest operating system. Successful operation information; When the guest operating system running on the client operates the virtual frame cache, and the operating system is an operating system running in the background, the operating instruction is not sent to the physical frame cache, and is directed to the guest operating system. Returns information that the operation was successful. The method of claim 3 wherein said operating on said client The guest operating system operates the virtual frame cache, and when the operating system is an operating system running in the foreground, the operating instruction is sent to the physical frame cache, and the information about the successful operation is returned to the guest operating system, including: When the guest operating system running on the client operates the virtual frame buffer, and the operating system is an operating system running in the foreground, the virtual frame buffer is set to be buffered to the physical frame. Send operation instructions and return information about successful operations to the guest operating system. The method of claim 1 wherein the method further comprises: Obtaining a physical frame buffer parameter of the physical frame buffer; The physical frame buffer parameter is provided when a frame buffer parameter query request of a guest operating system running on the client is received. A frame buffer implementation device, characterized in that the device comprises: a determining module, configured to determine that a physical frame cache address corresponding to the display device is mapped to a virtual address of the user space; An address allocation module, configured to allocate the virtual address to a client in response to a request by the client to obtain a storage area address corresponding to a virtual frame buffer address thereof, so that the client establishes a virtual frame cache address of the client A mapping relationship with the virtual address. The device of claim 6 wherein: The address allocation module is specifically configured to, when the client starts, allocate the virtual address to a client in response to a request of the client to obtain a storage area address corresponding to the virtual frame cache address thereof, so that the client The machine establishes a mapping relationship between the virtual frame cache address of the client and the virtual address. The device of claim 6 wherein said device further comprises: An operation module, configured to allocate the virtual address to a client in response to a request by the address allocation module to obtain a storage area address corresponding to a virtual frame cache address thereof, so that the client After establishing a mapping relationship between the virtual frame cache address of the client and the virtual address: When the guest operating system running on the client operates the virtual frame cache, and the operating system is an operating system running in the foreground, an operation instruction is sent to the physical frame cache, and is returned to the guest operating system. Successful operation information; When the guest operating system running on the client operates the virtual frame cache, and the operating system is an operating system running in the background, the operation instruction is not allowed to be sent to the physical frame cache, and is operated to the client. The system returns information that the operation was successful. The device of claim 8 wherein: The operation module is specifically configured to allocate the virtual address to a client in response to a request by the address allocation module to obtain a storage area address corresponding to a virtual frame cache address thereof, so that the client establishes a location After the virtual frame cache address of the client is mapped to the virtual address, when the guest operating system running on the client operates the virtual frame cache, and the operating system is an operating system running in the foreground And setting an operation instruction to the physical frame cache by setting a register of the virtual frame buffer, and returning information of successful operation to the guest operating system. The device of claim 6 wherein: The address allocation module is further configured to acquire a physical frame buffer parameter of the physical frame buffer; The operation module is further configured to provide the physical frame cache parameter when receiving a frame buffer parameter query request of a guest operating system running on the client. An electronic device, comprising: a display device, a memory, one or more processors; and one or more modules, the one or more modules being stored in the memory and configured to be executed by the one or more processors, The one or more modules include instructions for performing the various steps of the method of any of claims 1-5. A computer program product for use in conjunction with an electronic device including a display device The computer program product comprises a computer readable storage medium and a computer program mechanism embodied therein, the computer program mechanism comprising instructions for performing the various steps of the method of any of claims 1-5.

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