CN104268005A - Virtual machine waking method and device - Google Patents

Abstract

Embodiments of the present invention provide a method and device for waking up a virtual machine. By obtaining the context information and key memory pages of the virtual machine, the context information and key memory pages are restored from the disk to the memory, and the virtual machine is woken up, thereby completing the virtual machine. During the wake-up process, because only the context information and key memory pages of the virtual machine are restored from the disk to the memory, the amount of data restored from the disk to the memory is reduced to a certain extent, and the speed of the virtual machine wake-up is accelerated. In this process, there is no need for additional high-cost components to be deployed, which saves deployment costs.

Description

Virtual machine wake-up method and device

technical field

The embodiments of the present invention relate to computer technology, and in particular to a method and device for waking up a virtual machine.

Background technique

Virtual machine hibernation refers to saving the data of the virtual machine in the moving state to the disk, completely releasing the memory and CPU resources occupied by the virtual machine, and waking up the virtual machine refers to restoring the data saved in the disk to the memory and returning to the running state. Because the read and write speed of the disk is relatively slow, the speed of the virtual machine to sleep or wake up is relatively slow, but in practical applications, there is a higher requirement for the speed of the virtual machine to wake up.

In the prior art, in order to speed up the wake-up speed of the virtual machine, by deploying a high-speed physical cache on the host, when the virtual machine sleeps, the data is saved in the high-speed physical cache, and the data is restored from the high-speed physical cache when it wakes up, thereby speeding up The wakeup speed of the virtual machine.

However, the cost of deploying a high-speed physical cache is relatively high. Therefore, the deployment cost is increased by adopting the method of the prior art.

Contents of the invention

Embodiments of the present invention provide a method and device for waking up a virtual machine to save deployment costs.

The first aspect of the embodiments of the present invention provides a method for waking up a virtual machine, including:

Obtain context information of the virtual machine and key memory pages, where the key memory pages include memory pages necessary to wake up the virtual machine;

Restore the context information and the key memory page from disk to memory;

Wake up the virtual machine.

In combination with the first aspect, in the first possible implementation manner, before acquiring the context information of the virtual machine and the key memory page, it also includes:

The critical memory pages are identified.

With reference to the first possible implementation of the first aspect, in a second possible implementation, the identifying the critical memory page includes:

The critical memory page is identified according to the identification of the critical memory page during the virtual machine hibernation process.

With reference to the second possible implementation of the first aspect, in the third possible implementation, before identifying the critical memory page according to the identification of the critical memory page during the virtual machine hibernation process, further includes:

During the hibernation process of the virtual machine, a memory page of a preset type is determined as a key memory page.

With reference to the first possible implementation of the first aspect, in a fourth possible implementation, the identifying the critical memory page includes:

During the wake-up process of the virtual machine, a memory page of a preset type is determined as a key memory page.

With reference to the third or fourth possible implementation of the first aspect, in a fifth possible implementation, the preset type of memory page includes any of the following types:

A memory page within the address space range of the video graphics array VGA memory;

According to the memory distribution of the virtual machine, memory pages within the address space range from 0M to 1M;

According to the memory distribution of the virtual machine, memory pages within the address space range of 3.75G to 4G;

A memory page associated with register information in the context information of the virtual machine;

According to the memory page corresponding to the page table information cached in the transfer lookaside buffer TLB.

With reference to the first aspect or any possible implementation manner of the first to fifth possible implementation manners of the first aspect, in a sixth possible implementation manner, after waking up the virtual machine, the method further includes:

Restoring the common memory page to the memory, the common memory page refers to the memory page in the virtual machine data in the moving state except the context information and the key memory page.

The second aspect of the embodiment of the present invention provides a device for waking up a virtual machine, including:

An acquisition module, configured to acquire the context information of the virtual machine and key memory pages, where the key memory pages include memory pages necessary to wake up the virtual machine;

A key memory page restoration module, configured to restore the context information and the key memory page from the disk to the memory;

A wake-up module, configured to wake up the virtual machine.

With reference to the second aspect, in a first possible implementation manner, the device further includes:

A critical memory page identification module, configured to identify the critical memory page.

With reference to the first possible implementation of the second aspect, in the second possible implementation, the critical memory page identification module is specifically configured to identify the critical memory page according to the identification of the critical memory page during the virtual machine hibernation process critical memory pages.

With reference to the second possible implementation of the second aspect, in a third possible implementation, the critical memory page identification module is specifically configured to also determine that a preset type of memory page is critical memory pages.

With reference to the first possible implementation of the second aspect, in a fourth possible implementation, the critical memory page identification module is specifically configured to determine a preset type of memory page as a critical memory page during the wake-up process of the virtual machine .

With reference to the third or fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, the preset type of memory page includes any of the following types:

A memory page within the address space range of the video graphics array VGA memory;

According to the memory distribution of the virtual machine, memory pages within the address space range from 0M to 1M;

According to the memory distribution of the virtual machine, memory pages within the address space range of 3.75G to 4G;

A memory page associated with register information in the context information of the virtual machine;

According to the memory page corresponding to the page table information cached in the transfer lookaside buffer TLB.

In combination with the second aspect or any possible implementation manner of the first to fifth possible implementation manners of the second aspect, in a sixth possible implementation manner, it further includes:

The normal memory page restoring module is used to restore the common memory page to the memory, and the normal memory page refers to the memory page in the virtual machine data in the moving state except the context information and the key memory page.

The method and device for waking up a virtual machine provided by the embodiments of the present invention recover the context information and key memory pages from the disk to the memory by acquiring the context information and key memory pages of the virtual machine to wake up the virtual machine, thereby completing the wakeup of the virtual machine In this process, because only the context information and key memory pages of the virtual machine are restored from the disk to the memory, the amount of data restored from the disk to the memory is reduced to a certain extent, and the wake-up speed of the virtual machine is accelerated. Here During the process, there is no need for additional high-cost components for deployment, which saves deployment costs.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic flow diagram of Embodiment 1 of a method for waking up a virtual machine according to the present invention;

FIG. 2 is a schematic flowchart of Embodiment 2 of the method for waking up a virtual machine according to the present invention;

Fig. 3 is the effect comparison schematic diagram of the present invention and prior art;

FIG. 4 is a schematic structural diagram of Embodiment 1 of a device for waking up a virtual machine according to the present invention;

FIG. 5 is a schematic structural diagram of Embodiment 2 of the device for waking up a virtual machine according to the present invention;

FIG. 6 is a schematic structural diagram of Embodiment 3 of a device for waking up a virtual machine according to the present invention;

FIG. 7 is a schematic structural diagram of Embodiment 4 of an apparatus for waking up a virtual machine according to the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the embodiment of the present invention, the data of the virtual machine in the moving state is divided into key memory pages and common memory pages. The key memory pages refer to the memory pages necessary for waking up the virtual machine. The context information and key memory pages of the virtual machine are restored from the disk to the memory, and then the virtual machine is woken up to complete the wake-up process of the virtual machine; during this process, only the context information and key memory pages of the virtual machine are restored from the disk to the memory In the process, there is no need to restore ordinary memory pages from the disk to the memory, which reduces the amount of data restored from the disk to the memory to a certain extent, and speeds up the wake-up speed of the virtual machine. In the process, there is no need for additional deployment of high-cost components , saving deployment costs.

The technical solution of the present invention will be described in detail below with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

FIG. 1 is a schematic flow diagram of Embodiment 1 of the method for waking up a virtual machine according to the present invention. As shown in FIG. 1 , the method of this embodiment is as follows:

S101: Obtain context information and key memory pages of the virtual machine.

Wherein, the critical memory page includes memory pages necessary for waking up the virtual machine.

Specifically, before acquiring the context information of the virtual machine and the key memory page, further includes: identifying the key memory page.

Identifying key memory pages In different scenarios, the methods for identifying key memory pages are different. The present invention includes but is not limited to the following two implementations:

Among them, the first implementation method is to determine and identify the key memory page during the hibernation process of the virtual machine. To determine the key memory page during the hibernation process means to determine the preset type of memory page as the key memory page. After the key memory page is determined, the The key memory page is identified, specifically the identification method, one way, can be to store the key memory page in the preset address space of the disk, and the content stored in it can be identified as the key memory page through the address space; the other One method may be to mark the key memory page by adding a special character string; another method is to identify the address space storing the key memory page through the offset, and the present invention does not limit the specific identification method. This implementation method is to identify the key memory page according to the identification of the key memory page during the sleep process of the virtual machine during the wake-up process of the virtual machine.

In the second implementation manner, a memory page of a preset type is determined as a key memory page during the wake-up process of the virtual machine.

The second implementation is different from the first implementation in that the first implementation is to determine and identify a preset type of memory page as a key memory page during the hibernation process of the virtual machine. The second implementation manner is to determine a memory page of a preset type as a key memory page during the wake-up process of the virtual machine. The first implementation is more accurate than the second implementation.

Among them, the preset type of memory page includes any of the following types:

A memory page within the address space of the video graphics array VGA memory; this type can be dynamically identified according to the virtual machine context information, and this type of memory page affects the interface display after the virtual machine wakes up.

According to the memory distribution of the virtual machine, memory pages in the address space range of 0M to 1M; usually special memory pages in the memory range of 0M-1M, in order to ensure the normal operation of the virtual machine, this part of memory pages must be restored first.

According to the memory distribution of the virtual machine, memory pages within the address space range of 3.75G to 4G; memory pages within the address space range of 3.75G to 4G are mainly used for hardware mapping. In order to ensure the normal operation of the virtual machine device, the Some memory pages must be restored first.

According to the memory page associated with the register information in the context information of the virtual machine; specifically, according to the virtual machine CPU context information, obtain the register information currently being processed by the virtual machine, and dynamically identify the associated memory page according to the register information.

According to the memory page corresponding to the page table information cached in the transmission lookaside buffer TLB, the page table information cached in the TLB is usually a hot memory page, and the hot memory page refers to a memory page frequently accessed.

S102: Restore the context information and key memory pages from the disk to the memory.

S103: Waking up the virtual machine.

Thus, the process of waking up the virtual machine is completed.

In this embodiment, by obtaining the context information and key memory pages of the virtual machine, the context information and the key memory pages are restored from the disk to the memory, and the virtual machine is woken up, thereby completing the wake-up process of the virtual machine. During this process, due to Only the context information and key memory pages of the virtual machine are restored from the disk to the memory, which reduces the amount of data restored from the disk to the memory to a certain extent and speeds up the wake-up of the virtual machine. During this process, no additional deployment High-cost components save deployment costs.

In the above embodiment, after waking up the virtual machine, it also includes restoring the common memory page to the memory. The common memory page refers to the memory page in the virtual machine data in the moving state except the context information and the above-mentioned critical memory page. That is, normal memory pages are restored asynchronously in the background. If the virtual machine finds that the corresponding memory page cannot be found during the running process after waking up, it will find the corresponding memory page from the normal memory pages stored on the disk and restore it to the memory. The normal operation of virtual machine services is affected. In the technical solution of the embodiment of the present invention, only the virtual machine context information and key memory pages are restored from the disk to the memory during the virtual machine wake-up process, which reduces the amount of data read during the virtual machine wake-up process to a certain extent, that is, The time consumed in the process of waking up the virtual machine is the time for restoring the context information of the virtual machine and key memory pages from the disk to the memory, thus speeding up the waking up speed of the virtual machine.

For the first scenario in S101, that is, during the sleep process of the virtual machine, determine and identify the memory page of the preset type as a key memory page, and during the wake-up process of the virtual machine, according to the identification of the key memory page during the sleep process of the virtual machine Identify critical memory pages. Specifically, the process during the virtual machine sleep process is shown in FIG. 2, and FIG. 2 is a schematic flowchart of Embodiment 2 of the method for waking up a virtual machine according to the present invention. As shown in FIG. 2, the method of this embodiment is as follows:

Wherein, S201-S202 are the processes during the sleep process of the virtual machine, and S203-S206 are the processes during the wake-up process of the virtual machine.

S201: Identify the critical memory page by using the critical memory page identification module.

S202: After the key memory page is identified, the virtual machine context information, the key memory page and the common memory page are saved to the disk.

S203: The key memory page recovery device recovers the virtual machine context information and key memory pages to ensure that the virtual machine can be woken up normally.

S204: Waking up the virtual machine after restoring the context information and key memory pages, and activating the common memory restoring device at the same time.

After this step, the process of waking up the virtual machine is completed.

S205: The normal memory page recovery device reads the normal memory.

S206: The normal memory page restoration device restores the normal memory to the internal memory.

In this embodiment, by identifying key memory pages, during the virtual machine wake-up process, the virtual machine context information and key memory pages are restored from the disk to the memory, and the virtual machine is woken up, thereby completing the virtual machine wake-up process. After the virtual machine wakes up , restore normal memory pages to memory, that is, normal memory pages are restored to memory in an asynchronous manner, and only virtual machine context information and key memory pages are restored from disk to memory during the virtual machine wake-up process, which reduces to a certain extent The amount of data read during the virtual machine wake-up process, that is, the time spent during the virtual machine wake-up process is the time for restoring the virtual machine context information and key memory pages from the disk to the memory, thus speeding up the virtual machine wake-up speed.

In order to further describe the technical effect of the present invention, the embodiment of the present invention also provides a comparison simulation diagram of the virtual machine wake-up time between the method of the prior art and the technical solution of the embodiment of the present invention, as shown in Figure 3, which is the Schematic diagram of the effect comparison between the invention and the prior art. It can be seen from Fig. 3 that, using the solution of the prior art (corresponding to the normal wake-up in the illustration), as the specification of the virtual machine increases, the consumption time increases linearly, while using the technical solution of the present invention, the consumption time of the virtual machine wake-up is only small increase.

FIG. 4 is a schematic structural diagram of Embodiment 1 of the device for waking up a virtual machine according to the present invention. The device of this embodiment is set in the host computer where the virtual machine runs. The device of this embodiment includes an acquisition module 401, a key memory page recovery module 402, and a wakeup module 403. , wherein the obtaining module 401 is used to obtain the context information of the virtual machine and a key memory page, the key memory page includes memory pages necessary to wake up the virtual machine; the key memory page recovery module 402 is used to use the context information and The key memory page is restored from the disk to the memory; the wakeup module 403 is used to wake up the virtual machine.

Fig. 5 is a schematic structural diagram of Embodiment 2 of the device for waking up a virtual machine according to the present invention. Fig. 5 is based on the embodiment shown in Fig. 4 and further includes: a critical memory page identification module 404, configured to identify the critical memory page.

In the above embodiment, the critical memory page identification module 404 is specifically configured to identify the critical memory page according to the identification of the critical memory page during the virtual machine hibernation process.

In the above embodiment, the critical memory page identification module 404 is specifically configured to also determine a preset type of memory page as a critical memory page during the hibernation process of the virtual machine.

In the above embodiment, the critical memory page identification module 404 is specifically configured to determine a preset type of memory page as a critical memory page during the virtual machine wake-up process.

In the above embodiments, the preset types of memory pages include any of the following types:

A memory page within the address space range of the video graphics array VGA memory;

According to the memory distribution of the virtual machine, memory pages within the address space range from 0M to 1M;

According to the memory distribution of the virtual machine, memory pages within the address space range of 3.75G to 4G;

A memory page associated with register information in the context information of the virtual machine;

According to the memory page corresponding to the page table information cached in the transfer lookaside buffer TLB.

Fig. 6 is a schematic structural diagram of Embodiment 3 of the virtual machine wake-up device of the present invention. Fig. 6 is based on the embodiment shown in Fig. 5 and further includes: a common memory page restoration module 405 for restoring the normal memory page to the In the memory, the normal memory page refers to a memory page in the virtual machine data in a moving state except the context information and key memory pages.

Correspondingly, the devices in the device embodiments shown in Figure 4, Figure 5, and Figure 6 can be used to implement the technical solutions of the above-mentioned method embodiments shown in Figure 1 or Figure 2, and their implementation principles and technical effects are similar, and will not be repeated here. .

FIG. 7 is a schematic structural diagram of Embodiment 4 of the device for waking up a virtual machine according to the present invention. As shown in FIG. 7 , the device of this embodiment includes a memory 710 and a processor 720. Read-only memory, non-volatile memory or registers, etc. The processor 720 may be a central processing unit (Central Processing Unit, CPU). The memory 710 is used to store executable instructions. The processor 720 can execute the executable instruction stored in the memory 710, for example, the processor 720 is used to obtain the context information of the virtual machine and a key memory page, and the key memory page includes a necessary memory page for waking up the virtual machine; The context information and the key memory page are restored from the disk to the memory, and the virtual machine is woken up.

In this embodiment, by obtaining the context information of the virtual machine and the key memory page, the context information and the key memory page are restored from the disk to the memory, and the virtual machine is woken up, thereby completing the wake-up process of the virtual machine. In this process, only Restore the context information and key memory pages of the virtual machine from the disk to the memory, which reduces the amount of data restored from the disk to the memory to a certain extent, and speeds up the wake-up of the virtual machine. During this process, no additional deployment of high Cost-effective components, saving deployment costs.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by program instructions and related hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (14)

1. a virtual machine awakening method, is characterized in that, comprising:

Obtain the contextual information of virtual machine and crucial page, described crucial page comprises the page waking described virtual machine indispensability up;

Described contextual information and described crucial page are returned to internal memory from disk;

Wake described virtual machine up.

2. method according to claim 1, is characterized in that, before the contextual information of described acquisition virtual machine and crucial page, also comprises:

Identify described crucial page.

3. method according to claim 2, is characterized in that, the described crucial page of described identification, comprising:

According in virtual machine sleep procedure to the described crucial page of the mark identification of described crucial page.

4. method according to claim 3, is characterized in that, described according in virtual machine sleep procedure to before the described crucial page of the mark identification of described crucial page, also comprise:

In virtual machine sleep procedure, determine that the page of preset kind is crucial page.

5. method according to claim 2, is characterized in that, the described crucial page of described identification, comprising:

In virtual machine wakeup process, determine that the page of preset kind is crucial page.

6. the method according to claim 4 or 5, is characterized in that, the page of described preset kind comprises any one type following:

Page in Video Graphics Array VGA video memory address space range;

Distribute according to described virutal machine memory, be in the page in the address space range of 0M to 1M;

Distribute according to described virutal machine memory, be in the page in the address space range of 3.75G to 4G;

According to the page of the register information association in the contextual information of described virtual machine;

The page corresponding according to the page table information of buffer memory in transmission look-aside buffer TLB.

7. the method according to any one of claim 1 ~ 6, is characterized in that, described in wake described virtual machine up after also comprise:

Returned to by common memory page in described internal memory, described common memory page refers to the page in the virtual-machine data be kept in motion except described contextual information and crucial page.

8. a virtual machine Rouser, is characterized in that, comprising:

Acquisition module, for obtaining the contextual information of virtual machine and crucial page, described crucial page comprises the page waking described virtual machine indispensability up;

Crucial page recovers module, for returning to internal memory by described contextual information and described crucial page from disk;

Wake module, for waking described virtual machine up.

9. device according to claim 8, is characterized in that, also comprises:

Crucial page identification module, for identifying described crucial page.

10. device according to claim 9, is characterized in that, described crucial page identification module specifically for according in virtual machine sleep procedure to the described crucial page of the mark identification of described crucial page.

11. devices according to claim 10, is characterized in that, described crucial page identification module is specifically for also for determining that in virtual machine sleep procedure the page of preset kind is crucial page.

12. devices according to claim 9, is characterized in that, described crucial page identification module is specifically for determining that in virtual machine wakeup process the page of preset kind is crucial page.

13. devices according to claim 11 or 12, it is characterized in that, the page of described preset kind comprises any one type following:

Page in Video Graphics Array VGA video memory address space range;

Distribute according to described virutal machine memory, be in the page in the address space range of 0M to 1M;

Distribute according to described virutal machine memory, be in the page in the address space range of 3.75G to 4G;

According to the page of the register information association in the contextual information of described virtual machine;

The page corresponding according to the page table information of buffer memory in transmission look-aside buffer TLB.

Device described in 14. according to Claim 8 ~ 13 any one, is characterized in that, also comprise:

Common memory page recovers module, and for returning in described internal memory by common memory page, described common memory page refers to the page in the virtual-machine data be kept in motion except described contextual information and crucial page.