CN111857237B - Clock synchronization method, system, equipment and medium - Google Patents
Clock synchronization method, system, equipment and medium Download PDFInfo
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- CN111857237B CN111857237B CN202010733804.8A CN202010733804A CN111857237B CN 111857237 B CN111857237 B CN 111857237B CN 202010733804 A CN202010733804 A CN 202010733804A CN 111857237 B CN111857237 B CN 111857237B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
- G06F1/12—Synchronisation of different clock signals provided by a plurality of clock generators
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45537—Provision of facilities of other operating environments, e.g. WINE
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The invention discloses a clock synchronization method, which comprises the following steps: responding to the fact that a time service program of a virtual machine is called, and acquiring the time modified by an operating system of the virtual machine; transmitting the modified time to a host; the host calculates the current time according to the modified time and network delay; and setting the current time to an operating system of the host machine and storing the current time to a hardware circuit. The invention also discloses a system, computer equipment and a readable storage medium. The proposal of the invention creates a communication channel between the virtual machine operating system and the host machine operating system, realizes the modification of the system time of the virtual machine operating system, and synchronously modifies the system time of the physical machine operating system and the time of the hardware clock circuit, thus providing a simple method for the virtual machine operating system to modify the system time.
Description
Technical Field
The present invention relates to the field of virtual machines, and in particular, to a clock synchronization method, system, device, and storage medium.
Background
The VirtualBox is open source x86 architecture virtual machine software. The Qt writing method is used, so that the Qt writing method has rich characteristics and excellent performance. It is simple and easy to use, and the virtual system comprises Windows (from Windows 3.1 to Windows10, windows Server 2012, all supported by Windows systems), mac OS X, linux, openBSD, solaris, IBM OS2, and even Android operating systems. Compared with VMware and Virtual PC of the same nature, the Virtual Box is unique in that it includes Remote Desktop Protocol (RDP), iSCSI and USB support, and it can support USB 3.0 hardware devices on the client operating system, but VirtualBox Extension Pack is installed.
VirtualBox virtualization software is widely applied to projects of enterprises and personal development environments by virtue of excellent performance and open source. In the use process, the time synchronization function provided by the VirtualBox enhancement tool is found to be unsuitable for all scenes. The service application of the user generally runs in the virtual machine operating system, and when the integration level reaches a certain degree, the host machine operating system is generally invisible to the user, and the user starts up to directly and automatically enter the virtual machine operating system. As shown in fig. 1, the hardware platform installs Ubuntu operating system and VirtualBox virtualization software, and runs the virtual machine of the Windows operating system through the VirtualBox virtualization software. The service application is actually deployed in a virtual machine Windows operating system, and when the virtual machine is in an operating state, the time of the virtual machine Windows operating system is controlled by a host machine Ubuntu operating system and a virtual box virtualization software and can be kept consistent with the time of a physical machine. The virtual box virtualization software can not achieve the purpose of modifying the time of the hardware clock circuit by modifying the virtual machine operating system while keeping the synchronization of the virtual machine system time and the physical machine system time, and particularly when the virtual machine operating system is provided with the NTP time server, the virtual box enhancement tool and the NTP time synchronization server are used for modifying the system time of the virtual machine operating system at the same time, so that the system time of the virtual machine operating system is disordered, and the use of the user is greatly confused.
Disclosure of Invention
In view of this, in order to overcome at least one aspect of the above-mentioned problems, an embodiment of the present invention provides a clock synchronization method, including the following steps:
responding to the fact that a time service program of a virtual machine is called, and acquiring the time modified by an operating system of the virtual machine;
transmitting the modified time to a host;
the host calculates the current time according to the modified time and network delay;
and setting the current time to an operating system of the host machine and storing the current time to a hardware circuit.
In some embodiments, further comprising:
a virtual machine is built using the virtualization component.
In some embodiments, the modified time is sent to a host, further comprising:
and packaging the modified time into a data packet, and continuously transmitting a plurality of same data packets to the host according to a preset protocol.
In some embodiments, further comprising:
in response to a time service of a virtual machine not being invoked and a difference in system time between the virtual machine and the host machine being less than a threshold, time of an operating system of the virtual machine is smoothly adjusted using a time synchronization service of the virtualization component.
Based on the same inventive concept, according to another aspect of the present invention, an embodiment of the present invention further provides a clock synchronization system, including:
the monitoring module is configured to respond to the fact that a time service program of the virtual machine is called, and acquire the time after the operating system of the virtual machine is modified;
a sending module configured to send the modified time to a host;
the calculation module is configured to calculate the current time according to the modified time and the network delay by the host;
and the setting module is configured to set the current time to an operating system of the host machine and store the current time in a hardware circuit.
In some embodiments, further comprising:
and a building module configured to build the virtual machine using the virtualization component.
In some embodiments, the transmitting module is further configured to:
and packaging the modified time into a data packet, and continuously transmitting a plurality of same data packets to the host according to a preset protocol.
In some embodiments, the system further comprises an adjustment module configured to:
in response to a time service of a virtual machine not being invoked and a difference in system time between the virtual machine and the host machine being less than a threshold, time of an operating system of the virtual machine is smoothly adjusted using a time synchronization service of the virtualization component.
Based on the same inventive concept, according to another aspect of the present invention, an embodiment of the present invention further provides a computer apparatus, including:
at least one processor; and
a memory storing a computer program executable on the processor, wherein the processor performs the steps of any one of the clock synchronization methods described above when the program is executed.
Based on the same inventive concept, according to another aspect of the present invention, there is also provided a computer-readable storage medium storing a computer program which, when executed by a processor, performs the steps of any one of the clock synchronization methods described above.
The invention has one of the following beneficial technical effects: the proposal of the invention creates a communication channel between the virtual machine operating system and the host machine operating system, realizes the modification of the system time of the virtual machine operating system, and synchronously modifies the system time of the physical machine operating system and the time of the hardware clock circuit, thus providing a simple method for the virtual machine operating system to modify the system time.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention and that other embodiments may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block flow diagram of a clock synchronization method provided in the prior art;
FIG. 2 is a flowchart of a clock synchronization method according to an embodiment of the present invention;
FIG. 3 is a block flow diagram of a clock synchronization method according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a clock synchronization system according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a computer device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a computer-readable storage medium according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
It should be noted that, in the embodiments of the present invention, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present invention, and the following embodiments are not described one by one.
According to an aspect of the present invention, an embodiment of the present invention proposes a clock synchronization method, as shown in fig. 2, which may include the steps of:
s1, responding to the fact that a time service program of a virtual machine is called, and acquiring the time modified by an operating system of the virtual machine;
s2, the modified time is sent to a host;
s3, the host calculates the current time according to the modified time and the network delay;
s4, setting the current time to an operating system of the host machine and storing the current time to a hardware circuit.
The proposal of the invention creates a communication channel between the virtual machine operating system and the host machine operating system, realizes the modification of the system time of the virtual machine operating system, and synchronously modifies the system time of the physical machine operating system and the time of the hardware clock circuit, thus providing a simple method for the virtual machine operating system to modify the system time.
In some embodiments, further comprising:
a virtual machine is built using the virtualization component.
In some embodiments, the modified time is sent to a host, further comprising:
and packaging the modified time into a data packet, and continuously transmitting a plurality of same data packets to the host according to a preset protocol.
In some embodiments, further comprising:
in response to a time service of a virtual machine not being invoked and a difference in system time between the virtual machine and the host machine being less than a threshold, time of an operating system of the virtual machine is smoothly adjusted using a time synchronization service of the virtualization component.
The following takes the operating system of the virtual machine as Windows, and the operating system of the host machine as Ubuntu as an example, and the clock synchronization method provided by the invention is described in detail with reference to FIG. 3.
As shown in fig. 3, in this embodiment, the first part is a clock synchronization component server, which is deployed as part of the VirtualBox virtualization software in the Ubuntu operating system of the host. And starting with the Ubuntu system, automatically starting operation as a system service of the virtual Box, and waiting for data transmission of the client. The second part is the Client end of the time synchronization component, which is deployed on the Windows operating system of the virtual machine as part of the VirtualBox enhancement tool. And continuously monitoring the system time by the Client, and when the API of the system time is called, acquiring the latest system time of the current Windows operating system by the Client, and transmitting the time data of the Windows operating system to a server of the corresponding host Ubuntu operating system through a UDP protocol. And the server terminal modifies the system time of the Ubuntu operating system of the host machine according to the received time data, and stores the modified time in the hardware clock circuit.
Specifically, the system time of the Windows operating system of the virtual machine is maintained by a Windows time service program, the client of the time synchronization component monitors the call of the API of the Windows time service program through a HOOK mechanism, and when the business application calls the API of the Windows time service program, the system time of the Windows operating system is modified, and the client of the time synchronization component captures the modified system time of the Windows operating system.
After capturing the modified system time of the Windows operating system, the system time of the Windows operating system is sent to a clock synchronization component server through a UDP protocol. To ensure the security of data transmission, 3 identical data packets are consecutively transmitted.
The clock synchronization component server end running in the Ubuntu operating system monitors the data packet on the network all the time, when the time data packet sent by the clock synchronization component client end is received, the network delay is subtracted, the current time is calculated, the current time is set to the Ubuntu operating system, and the current time is stored in the hardware clock circuit. And directly discarding the time data packet when the repeated time data packet is received.
When no business application modifies the virtual machine system time and the system time between the virtual machine and the host is only slightly different, the VirtualBox virtualization software native time synchronization service will attempt to adjust the virtual machine system time smoothly in small increments step by step to reduce the time difference.
In some embodiments, the code of the clock synchronization component server may generate a binary executable file and a self-starting script through preprocessing, compiling and linking, and package the executable file and the self-starting script together with an installer of the VirtualBox virtualization software to generate an installation package of the VirtualBox virtualization software.
In some embodiments, the above generated VirtualBox virtualization software installation package is installed on the Ubuntu operating system via a dpkg command. Under the corresponding directory of the Ubuntu operating system which can be automatically copied by the executable file and the self-starting script of the time synchronization component server, when the Ubuntu operating system is started, the self-starting script is called by the system starting script, and the time synchronization component server is automatically started.
In some embodiments, the code of the clock synchronization component client may generate binary executable files and configuration files through preprocessing, compiling and linking, and package with the installer of the VirtualBox enhancement tool to generate an enhancement tool installation package of the VirtualBox virtualization software;
in some embodiments, in the Windows operating system of the virtual machine, the virtual box enhancement tool installation package is installed by means of a graphical interface, the clock synchronization component client is automatically installed along with the virtual box enhancement tool, the clock synchronization component client configuration file is manually modified, and the IP address of the running system of the clock synchronization component server is added.
The proposal of the invention creates a communication channel between the virtual machine operating system and the host machine operating system, realizes the modification of the system time of the virtual machine operating system, and synchronously modifies the system time of the physical machine operating system and the time of the hardware clock circuit, thus providing a simple method for the virtual machine operating system to modify the system time.
Based on the same inventive concept, according to another aspect of the present invention, there is also provided a clock synchronization system 400, as shown in fig. 4, including:
the monitoring module 401 is configured to respond to the fact that a time service program of the virtual machine is called, and acquire time after the operating system of the virtual machine is modified;
a transmission module 402, the transmission module 402 configured to transmit the modified time to a host;
a calculation module 403, wherein the calculation module 403 is configured to calculate a current time according to the modified time and a network delay by the host;
a setting module 404, wherein the setting module 404 is configured to set the current time to an operating system of the host machine and save the current time to a hardware circuit.
In some embodiments, further comprising:
and a building module configured to build the virtual machine using the virtualization component.
In some embodiments, the transmitting module 402 is further configured to:
and packaging the modified time into a data packet, and continuously transmitting a plurality of same data packets to the host according to a preset protocol.
In some embodiments, the system further comprises an adjustment module configured to:
in response to a time service of a virtual machine not being invoked and a difference in system time between the virtual machine and the host machine being less than a threshold, time of an operating system of the virtual machine is smoothly adjusted using a time synchronization service of the virtualization component.
Based on the same inventive concept, according to another aspect of the present invention, as shown in fig. 5, an embodiment of the present invention further provides a computer apparatus 501, including:
at least one processor 520; and
the memory 510, the memory 510 stores a computer program 511 executable on a processor, and the processor 520 performs any of the steps of the clock synchronization method described above when executing the program.
According to another aspect of the present invention, as shown in fig. 6, based on the same inventive concept, an embodiment of the present invention further provides a computer-readable storage medium 601, where the computer-readable storage medium 601 stores computer program instructions 610, and the computer program instructions 610 when executed by a processor perform the steps of any of the clock synchronization methods as above.
Finally, it should be noted that, as will be appreciated by those skilled in the art, all or part of the procedures in implementing the methods of the embodiments described above may be implemented by a computer program to instruct related hardware, and the program may be stored in a computer readable storage medium, where the program may include the procedures of the embodiments of the methods described above when executed.
Further, it should be appreciated that the computer-readable storage medium (e.g., memory) herein can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as software or hardware depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
It should be understood that as used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.
The foregoing embodiment of the present invention has been disclosed with reference to the number of embodiments for the purpose of description only, and does not represent the advantages or disadvantages of the embodiments.
It will be appreciated by those of ordinary skill in the art that all or part of the steps of implementing the above embodiments may be implemented by hardware, or may be implemented by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, where the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
Those of ordinary skill in the art will appreciate that: the above discussion of any embodiment is merely exemplary and is not intended to imply that the scope of the disclosure of embodiments of the invention, including the claims, is limited to such examples; combinations of features of the above embodiments or in different embodiments are also possible within the idea of an embodiment of the invention, and many other variations of the different aspects of the embodiments of the invention as described above exist, which are not provided in detail for the sake of brevity. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the embodiments should be included in the protection scope of the embodiments of the present invention.
Claims (10)
1. A method of clock synchronization comprising the steps of:
responding to the fact that a time service program of a virtual machine is called, and acquiring the time modified by an operating system of the virtual machine;
transmitting the modified time to a host;
the host calculates the current time according to the modified time and network delay;
and setting the current time to an operating system of the host machine and storing the current time to a hardware circuit.
2. The method as recited in claim 1, further comprising:
a virtual machine is built using the virtualization component.
3. The method of claim 2, wherein transmitting the modified time to a host further comprises:
and packaging the modified time into a data packet, and continuously transmitting a plurality of same data packets to the host according to a preset protocol.
4. The method as recited in claim 2, further comprising:
in response to a time service of a virtual machine not being invoked and a difference in system time between the virtual machine and the host machine being less than a threshold, time of an operating system of the virtual machine is smoothly adjusted using a time synchronization service of the virtualization component.
5. A clock synchronization system, comprising:
the monitoring module is configured to respond to the fact that a time service program of the virtual machine is called, and acquire the time after the operating system of the virtual machine is modified;
a sending module configured to send the modified time to a host;
the calculation module is configured to calculate the current time according to the modified time and the network delay by the host;
and the setting module is configured to set the current time to an operating system of the host machine and store the current time in a hardware circuit.
6. The system as recited in claim 5, further comprising:
and a building module configured to build the virtual machine using the virtualization component.
7. The system of claim 6, wherein the sending module is further configured to:
and packaging the modified time into a data packet, and continuously transmitting a plurality of same data packets to the host according to a preset protocol.
8. The system of claim 6, further comprising an adjustment module configured to:
in response to a time service of a virtual machine not being invoked and a difference in system time between the virtual machine and the host machine being less than a threshold, time of an operating system of the virtual machine is smoothly adjusted using a time synchronization service of the virtualization component.
9. A computer device, comprising:
at least one processor; and
a memory storing a computer program executable on the processor, wherein the processor performs the steps of the method of any of claims 1-4 when the program is executed.
10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor performs the steps of the method according to any of claims 1-4.
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| CN112904932A (en) * | 2021-05-08 | 2021-06-04 | 鹏城实验室 | Clock synchronization method, board card, computer storage medium and terminal equipment |
| CN113672031A (en) * | 2021-09-07 | 2021-11-19 | 西安超越申泰信息科技有限公司 | Time synchronization method and device, computer equipment and storage medium |
| CN114003091B (en) * | 2021-10-29 | 2024-01-30 | 深圳市科思科技股份有限公司 | Time synchronization method, device, equipment and storage medium |
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