CN109510682B - A pooled server system BMC clock synchronization method, device, terminal and storage medium - Google Patents

Abstract

The invention provides a BMC clock synchronization method of a pooling server system, which comprises the following steps: a first-level Box server cascaded below a Host server receives a clock synchronization request sent by the Host server and starts timing; setting a calibration time length T and a calibration time error T, and when the timing time length exceeds T, carrying out system clock calibration on the first-level Box server and the Host server; when the calibration time error is larger than t, judging whether the current Host server is a clock source Host server or not; if the current Host server is the clock source Host server, the primary Box server acquires a system clock of the current Host server, performs clock synchronization and clears the timer, and if the current Host server is not the clock source Host server, the current Host server acquires the system clock of the primary Box server, updates the system time of the primary Box server and clears the timer; the method and the device can synchronize the multiple Host servers and the lower cascade Box server by determining the system clock of the Host server as the only clock source, and ensure the unification of the system time of the whole pooling server.

Description

A pooled server system BMC clock synchronization method, device, terminal and storage medium

technical field

The invention relates to the technical field of servers, in particular to a method, device, terminal and storage medium for BMC clock synchronization of a pooled server system.

Background technique

With the development of cloud computing technology and big data technology, the cost of server computing resources and storage resources continues to rise. How to improve the effective utilization of server node resources is an urgent problem that data centers need to solve. The dynamic pooling of server system resources is designed to be a key factor in the efficient operation of the system. The PCIE Switch pooled server system realizes intelligent and dynamic allocation and combination of computing and storage resources through PCI-E interconnection, which can effectively improve the utilization rate of computer storage resources. The entire pooling system consists of the Host server and the Box server. The computing and storage resources of the Host server are integrated into a pool through the Box server, and the resource utilization rate of the system is improved through the scheduling and management of the pooled resources.

In the pooled server system, the BMC of the Host server obtains the time from the BIOS and ME, and the BMC of the Box server obtains the time from the RTC chip of the motherboard. The BMC time of the entire pooled server system is not uniform.

Therefore, there is an urgent need for a BMC clock synchronization method in a pooled server system to realize automatic synchronization of BMC time in the entire pooled server system.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present invention provides a BMC clock synchronization method, device, terminal and storage medium of a pooled server system to solve the above technical problems.

In a first aspect, an embodiment of the present application provides a method for synchronizing a BMC clock of a pooled server system, the method comprising:

The first-level Box server cascaded under the Host server receives the clock synchronization request sent by the Host server and starts timing;

Set the calibration duration T and calibration time error t, when the timing duration exceeds T, the system clock calibration is performed between the first-level Box server and the Host server;

When the calibration time error is greater than t, determine whether the current Host server is the clock source Host server;

If the current Host server is the clock source Host server, the first-level Box server obtains the system clock of the current Host server, synchronizes the clock and clears the timer. If the current Host server is not the clock source Host server, the current Host server obtains the first-level host server. The system clock of the Box server, updates its own system time and clears the timer.

In combination with the first aspect, in the first embodiment of the first aspect, the calibration duration T and calibration time error t are set, and when the timing duration exceeds T, the system clock calibration is performed between the first-level Box server and the Host server, including :

Set the calibration duration T=1h, and the calibration time error t=1s;

When the timing exceeds 1 hour, the first-level Box server obtains the system clock of the Host server and compares it with its own system clock.

With reference to the first aspect, in the second implementation manner of the first aspect, when the calibration time error is greater than t, determining whether the current Host server is the clock source Host server includes:

If the system topology of the pooled server is a topology in which a single Host is connected to multiple Boxes, it is determined that the current Host server is the clock source Host server;

If the system topology of the pooled server is a topology in which multiple Hosts are connected to a single Box, obtain the Channel number of the current link, and determine whether the system time of the first-level Box server has been synchronized. If yes, determine the clock source Host server according to the Channel number. Otherwise, determine that the current host server is the clock source host server.

In combination with the first aspect, in the third embodiment of the first aspect, if the current Host server is the clock source Host server, the first-level Box server obtains the system clock of the current Host server, synchronizes the clock and clears the timer , if the current Host server is not the clock source Host server, the current Host server obtains the system clock of the first-level Box server, updates its own system time and clears the timer, including:

If the current Host server is the clock source Host server, the first-level Box server BMC obtains the system clock of the current Host server, updates its own system time and RTC chip time, and clears the timer;

If the current host server is not the clock source host server, the current host server BMC obtains the system clock of the first-level Box server, updates its own system time, and clears the timer.

In conjunction with the first aspect, in a fourth implementation manner of the first aspect, the method further includes:

If the Host server in the system topology of the pooled server has a cascaded second-level Box server, the second-level Box server obtains the system clock of the first-level Box server and synchronizes the clock, and the first-level Box server BMC synchronizes the time to the second-level Box server. Server BMC.

In a second aspect, an embodiment of the present application provides a BMC clock synchronization device for a pooled server system, the device comprising:

A receiving unit, the receiving unit is used for the first-level Box server cascaded under the Host server to receive the clock synchronization request sent by the Host server and start timing;

A clock calibration unit, the clock calibration unit is used to set the calibration duration T and the calibration time error t, and when the timing duration exceeds T, the system clock calibration is performed between the first-level Box server and the Host server;

a judgment unit, which is used to judge whether the current Host server is a clock source Host server when the calibration time error is greater than t;

The clock synchronization unit is used for if the current Host server is the clock source Host server, the first-level Box server obtains the system clock of the current Host server, synchronizes the clock and clears the timer, if the current Host server is not the clock The source Host server, the current Host server obtains the system clock of the first-level Box server, updates its own system time, and clears the timer.

With reference to the second aspect, in a first implementation manner of the second aspect, the clock calibration unit is specifically configured to:

Set the calibration duration T=1h, and the calibration time error t=1s;

When the timing exceeds 1 hour, the first-level Box server obtains the system clock of the Host server and compares it with its own system clock.

With reference to the second aspect, in a second implementation manner of the second aspect, the judging unit specifically includes:

If the system topology of the pooled server is a topology in which a single Host is connected to multiple Boxes, it is determined that the current Host server is the clock source Host server;

If the system topology of the pooled server is a topology in which multiple Hosts are connected to a single Box, obtain the Channel number of the current link, and determine whether the system time of the first-level Box server has been synchronized. If yes, determine the clock source Host server according to the Channel number. Otherwise, determine that the current host server is the clock source host server.

With reference to the second aspect, in a third implementation manner of the second aspect, the clock synchronization unit is specifically configured to:

If the current Host server is the clock source Host server, the first-level Box server obtains the system clock of the current Host server, synchronizes the clock and clears the timer.

If the current host server is not the clock source host server, the current host server obtains the system clock of the first-level Box server, updates its own system time, and clears the timer.

With reference to the second aspect, in a fourth implementation manner of the second aspect, the clock synchronization unit is further configured to:

If the Host server in the system topology of the pooled server has a cascaded second-level Box server, the second-level Box server obtains the system clock of the first-level Box server and synchronizes the clock, and the first-level Box server BMC synchronizes the time to the second-level Box server. Server BMC.

In a third aspect, a terminal is provided, including:

processor, memory, where,

The memory is used to store computer programs,

The processor is used to call and run the computer program from the memory, so that the above method is executed in the terminal.

In a fourth aspect, a computer storage medium is provided, and instructions are stored in the computer-readable storage medium, which, when executed on a computer, cause the computer to perform the methods described in the above aspects.

In a fifth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the methods of the above aspects.

The beneficial effects of the present invention are:

The BMC clock synchronization method, device, terminal and storage medium of the pooled server system provided by the present invention can synchronize multiple Host servers and lower cascaded Box servers by determining the system clock of the unique clock source Host server, so as to ensure the system time of the entire pooled server. By setting the calibration time for regular clock calibration, the Box clock accuracy is improved, the BMC time synchronization process of the entire pooled server system is simplified, the usability and flexibility of the product are increased, and the operation and maintenance efficiency is improved.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. In other words, other drawings can also be obtained based on these drawings without creative labor.

FIG. 1 is a schematic flowchart of a method according to an embodiment of the present application.

Figure 2 is a topology diagram of a single Host connecting multiple Boxes.

Figure 3 is a topology diagram of multiple Hosts connected to a single Box.

FIG. 4 is a schematic block diagram of an apparatus according to an embodiment of the present application.

FIG. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

FIG. 1 is a schematic flowchart of a method according to an embodiment of the present application. The execution body of FIG. 1 may be a BMC clock synchronization device of a pooled server system.

As shown in FIG. 1, the method 100 includes:

Step 110, the first-level Box server cascaded under the Host server receives the clock synchronization request sent by the Host server and starts timing;

Step 120, set the calibration duration T and calibration time error t, and when the timing duration exceeds T, perform system clock calibration on the first-level Box server and the Host server;

Step 130, when the calibration time error is greater than t, determine whether the current Host server is the clock source Host server;

Step 140, if the current Host server is the clock source Host server, the first-level Box server obtains the system clock of the current Host server, synchronizes the clock and clears the timer, if the current Host server is not the clock source Host server, then the current Host server Get the system clock of the first-level Box server, update its own system time and clear the timer.

Optionally, as an embodiment of the present application, the set calibration duration T and calibration time error t, when the timing duration exceeds T, perform system clock calibration on the first-level Box server and the Host server, including:

Set the calibration duration T=1h, and the calibration time error t=1s;

When the timing exceeds 1 hour, the first-level Box server obtains the system clock of the Host server and compares it with its own system clock.

Optionally, as an embodiment of the present application, when the calibration time error is greater than t, determining whether the current Host server is a clock source Host server includes:

If the system topology of the pooled server is a topology in which a single Host is connected to multiple Boxes, it is determined that the current Host server is the clock source Host server;

If the system topology of the pooled server is a topology in which multiple Hosts are connected to a single Box, obtain the Channel number of the current link, and determine whether the system time of the first-level Box server has been synchronized. If yes, determine the clock source Host server according to the Channel number. Otherwise, determine that the current host server is the clock source host server.

Optionally, as an embodiment of the present application, if the current Host server is the clock source Host server, the first-level Box server obtains the system clock of the current Host server, synchronizes the clock and clears the timer, if the current Host server does not If the host server is the clock source, the current Host server obtains the system clock of the first-level Box server, updates its own system time and clears the timer, including:

If the current Host server is the clock source Host server, the first-level Box server BMC obtains the system clock of the current Host server, updates its own system time and RTC chip time, and clears the timer;

If the current host server is not the clock source host server, the current host server BMC obtains the system clock of the first-level Box server, updates its own system time, and clears the timer.

Optionally, as an embodiment of the present application, the method further includes:

If the Host server in the system topology of the pooled server has a cascaded second-level Box server, the second-level Box server obtains the system clock of the first-level Box server and synchronizes the clock, and the first-level Box server BMC synchronizes the time to the second-level Box server. Server BMC.

In order to facilitate the understanding of the present invention, the following describes the method for synchronizing the BMC clock of a pooled server system provided by the present invention based on the principle of the BMC clock synchronization of the pooled server system of the present invention and the process of synchronizing the BMC clock of the pooled server system in the embodiment. description of.

Specifically, the method for synchronizing the BMC clock of the pooled server system includes the following steps:

S1. The first-level Box server cascaded under the Host server receives the clock synchronization request sent by the Host server and starts timing;

S2. Set the calibration duration T=1h, and the calibration time error t=1s; when the timing duration exceeds 1 hour, the first-level Box server obtains the system clock of the Host server and compares it with its own system clock;

S3. If the calibration time error exceeds 1 second, determine whether the current Host server is the clock source Host server. If the calibration time error does not exceed 1 second, the timer is cleared and re-timed;

S4. If the system topology of the pooled server is a topology in which a single Host is connected to multiple Boxes (as shown in Figure 2), the current Host server is determined as the clock source Host server, and the first-level Box server BMC obtains the current Host server System clock, update its own system time and RTC chip time, and clear the timer;

If the system topology of the pooled server is a topology in which multiple hosts are connected to a single box (as shown in Figure 3), obtain the Channel number of the current link, and determine whether the system time of the first-level Box server has been synchronized. If the server system time has been synchronized, the clock source Host server is determined according to the Channel number. The current Host server BMC obtains the system clock of the first-level Box server, updates its own system time, and clears the timer;

If the system time of the first-level Box server is not synchronized, it is determined that the current Host server is the clock source Host server, and the first-level Box server BMC obtains the system clock of the current Host server, updates its own system time and RTC chip time, and clears the timer;

S5. If the Host server in the system topology of the pooled server has a cascaded second-level Box server, the second-level Box server obtains the system clock of the first-level Box server and synchronizes the clock, and the first-level Box server BMC synchronizes the time to the second-level Box server. Level Box server BMC.

The pooled server system realizes PCIe interconnection through a PCIe Switch chip, the Host server and the Box server are connected through a MiniSAS cable, and the Host server BMC and the Box server BMC communicate through I2C signals on the MiniSAS cable.

As shown in FIG. 4, the apparatus 400 includes:

The receiving unit 410, the receiving unit 410 is used for the first-level Box server cascaded under the Host server to receive the clock synchronization request sent by the Host server and start timing;

The clock calibration unit 420 is used to set the calibration duration T and the calibration time error t, and when the timing duration exceeds T, the system clock calibration is performed between the first-level Box server and the Host server;

Judging unit 430, the judging unit 430 is used to judge whether the current Host server is the clock source Host server when the calibration time error is greater than t;

Clock synchronization unit 440, the clock synchronization unit 440 is used for if the current Host server is the clock source Host server, the first-level Box server obtains the system clock of the current Host server, performs clock synchronization and clears the timer, if the current Host server does not If the host server is the clock source, the current host server obtains the system clock of the first-level Box server, updates its own system time, and clears the timer.

Optionally, as an embodiment of the present application, the clock calibration unit 410 is specifically configured to:

Set the calibration duration T and calibration time error t. When the timing duration exceeds T, calibrate the system clock between the first-level Box server and the Host server.

Optionally, as an embodiment of the present application, the clock calibration unit 420 is specifically configured to:

Set the calibration duration T=1h, and the calibration time error t=1s;

When the timing exceeds 1 hour, the first-level Box server obtains the system clock of the Host server and compares it with its own system clock.

Optionally, as an embodiment of the present application, the judging unit 430 specifically includes:

If the system topology of the pooled server is a topology in which a single Host is connected to multiple Boxes, it is determined that the current Host server is the clock source Host server;

If the system topology of the pooled server is a topology in which multiple Hosts are connected to a single Box, obtain the Channel number of the current link, and determine whether the system time of the first-level Box server has been synchronized. If yes, determine the clock source Host server according to the Channel number. Otherwise, determine that the current host server is the clock source host server.

Optionally, as an embodiment of the present application, the clock synchronization unit 440 is specifically configured to:

If the current Host server is the clock source Host server, the first-level Box server obtains the system clock of the current Host server, synchronizes the clock and clears the timer.

If the current host server is not the clock source host server, the current host server obtains the system clock of the first-level Box server, updates its own system time, and clears the timer.

Optionally, as an embodiment of the present application, the clock synchronization unit 440 is further specifically configured to:

If the Host server in the system topology of the pooled server has a cascaded second-level Box server, the second-level Box server obtains the system clock of the first-level Box server and synchronizes the clock, and the first-level Box server BMC synchronizes the time to the second-level Box server. Server BMC.

FIG. 5 is a schematic structural diagram of a terminal device 500 according to an embodiment of the present invention, and the terminal device 500 may be used to execute a method for synchronizing a BMC clock of a pooled server system provided by an embodiment of the present application.

The terminal device 500 may include: a processor 510 , a memory 520 and a communication unit 530 . These components communicate through one or more buses. Those skilled in the art can understand that the structure of the server shown in the figure does not constitute a limitation to the present application. It can be either a bus-shaped structure, a star-shaped structure, or a More or fewer components than shown may be included, or some components may be combined, or a different arrangement of components.

Wherein, the memory 520 can be used to store the execution instructions of the processor 510, and the memory 520 can be realized by any type of volatile or non-volatile storage terminal or their combination, such as static random access memory (SRAM), electrical Erasable Programmable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic Disk or Optical Disk . When the execution instructions in the memory 520 are executed by the processor 510, the terminal 500 is enabled to execute some or all of the steps in the following method embodiments.

The processor 510 is the control center of the storage terminal, using various interfaces and lines to connect various parts of the entire electronic terminal, by running or executing the software programs and/or modules stored in the memory 520, and calling the data stored in the memory, To perform various functions of the electronic terminal and/or process data. The processor may be composed of an integrated circuit (Integrated Circuit, IC for short), for example, may be composed of a single packaged IC, or may be composed of a plurality of packaged ICs connected with the same function or different functions. For example, the processor 510 may only include a central processing unit (Central Processing Unit, CPU for short). In the embodiments of the present application, the CPU may be a single computing core, or may include multiple computing cores.

The communication unit 530 is used for establishing a communication channel, so that the storage terminal can communicate with other terminals. Receive user data sent by other terminals or send user data to other terminals.

The present application also provides a computer storage medium, wherein the computer storage medium can store a program, and when the program is executed, the program can include some or all of the steps in the embodiments provided in the present application. The storage medium may be a magnetic disk, an optical disk, a read-only memory (English: read-only memory, ROM for short) or a random access memory (English: random access memory, RAM for short).

Therefore, the BMC clock synchronization method, device, terminal and storage medium of the pooled server system provided by the present application can synchronize multiple Host servers and lower cascaded Box servers by determining the system clock of the unique clock source Host server, so as to ensure the entire pooled server. Unification of system time, regular clock calibration by setting calibration time, improves Box clock accuracy, simplifies the BMC time synchronization process of the entire pooled server system, increases product usability and flexibility, and improves operation and maintenance efficiency. This embodiment For the technical effects that can be achieved, reference may be made to the above description, which will not be repeated here.

Those skilled in the art can clearly understand that the technology in the embodiments of the present application can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solutions in the embodiments of the present application can be embodied in the form of software products in essence or in the parts that make contributions to the prior art. The computer software products are stored in a storage medium such as a USB flash drive, a mobile Hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes, including several instructions to make a computer terminal (It may be a personal computer, a server, or a second terminal, a network terminal, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention.

It is sufficient to refer to each other for the same and similar parts among the various embodiments in this specification. In particular, for the terminal embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for related parts, please refer to the description in the method embodiment.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

Although the present invention has been described in detail in conjunction with the preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all fall within the scope of the present invention/any Those skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should all be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (8)

1. an optimal master clock synchronization method for a pooled server system, characterized in that the method comprises: The first-level Box server cascaded under the Host server receives the clock synchronization request sent by the Host server and starts timing; Set the calibration duration T and calibration time error t, when the timing duration exceeds T, the system clock calibration is performed between the first-level Box server and the Host server; When the calibration time error is greater than t, determine whether the current Host server is the clock source Host server: if the system topology of the pooled server is a single Host connected to multiple Boxes, the current Host server is determined to be the clock source Host server; if The system topology of the pooled server is the topology of multiple hosts connected to a single box. Obtain the number of channels of the current link to determine whether the system time of the first-level Box server has been synchronized. If yes, determine the clock source Host server according to the number of channels, otherwise Make sure the current Host server is the clock source Host server; If the current Host server is the clock source Host server, the first-level Box server obtains the system clock of the current Host server, synchronizes the clock and clears the timer. If the current Host server is not the clock source Host server, the current Host server obtains the first-level host server. The system clock of the Box server, updates its own system time and clears the timer. 2. the best master clock synchronization method of pooled server system as claimed in claim 1, it is characterized in that, described setting calibration duration T, calibration time error t, when timing duration exceeds T, will first-level Box server and Host The server performs system clock calibration, including: Set the calibration duration T=1h, and the calibration time error t=1s; When the timing exceeds 1 hour, the first-level Box server obtains the system clock of the Host server and compares it with its own system clock. 3. the best master clock synchronization method of pooled server system as claimed in claim 1, is characterized in that, described if current Host server is clock source Host server, then first-level Box server obtains the system clock of current Host server, carries out The clock is synchronized and the timer is cleared. If the current host server is not the clock source host server, the current host server obtains the system clock of the first-level Box server, updates its own system time and clears the timer, including: If the current Host server is the clock source Host server, the first-level Box server obtains the system clock of the current Host server, updates its own system time and RTC chip time, and clears the timer; If the current host server is not the clock source host server, the current host server obtains the system clock of the first-level Box server, updates its own system time, and clears the timer. 4. An optimal master clock synchronization device for a pooled server system, characterized in that the device comprises: A receiving unit, the receiving unit is used for the first-level Box server cascaded under the Host server to receive the clock synchronization request sent by the Host server and start timing; A clock calibration unit, the clock calibration unit is used to set the calibration duration T and the calibration time error t, and when the timing duration exceeds T, the system clock calibration is performed between the first-level Box server and the Host server; A judging unit, the judging unit is used to judge whether the current Host server is a clock source Host server when the calibration time error is greater than t: if the system topology of the pooled server is a topology in which a single Host is connected to multiple Boxes, then determine whether the current Host server is a clock source Host server. The host server is the clock source host server; if the system topology of the pooled server is the topology of multiple hosts connected to a single box, obtain the number of channels of the current link, and determine whether the system time of the first-level box server has been synchronized. The number of channels determines the clock source Host server, otherwise the current Host server is determined as the clock source Host server; The clock synchronization unit is used for if the current Host server is the clock source Host server, the first-level Box server obtains the system clock of the current Host server, synchronizes the clock and clears the timer, if the current Host server is not the clock The source Host server, the current Host server obtains the system clock of the first-level Box server, updates its own system time, and clears the timer. 5. the best master clock synchronization device of the pooled server system as claimed in claim 4, is characterized in that, described clock calibration unit is specifically used for: Set the calibration duration T=1h, and the calibration time error t=1s; When the timing exceeds 1 hour, the first-level Box server obtains the system clock of the Host server and compares it with its own system clock. 6. The best master clock synchronization device of a pooled server system as claimed in claim 4, wherein the clock synchronization unit is specifically used for: If the current Host server is the clock source Host server, the first-level Box server obtains the system clock of the current Host server, synchronizes the clock and clears the timer. If the current host server is not the clock source host server, the current host server obtains the system clock of the first-level Box server, updates its own system time, and clears the timer. 7. A terminal, characterized in that, comprising: processor; memory for storing instructions for execution of the processor; wherein the processor is configured to perform the method of any one of claims 1-3. 8. A computer-readable storage medium storing a computer program, characterized in that, when the program is executed by a processor, the method according to any one of claims 1-3 is implemented.

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