CN113377156B

CN113377156B - RTC clock accuracy verification method and device

Info

Publication number: CN113377156B
Application number: CN202110788375.9A
Authority: CN
Inventors: 高林
Original assignee: Beijing Tongfang Information Safety Technology Co ltd
Current assignee: Beijing Tongfang Information Safety Technology Co ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2024-07-26
Anticipated expiration: 2041-07-13
Also published as: CN113377156A

Abstract

The invention relates to a method and a device for verifying RTC clock accuracy, comprising the following steps: connecting an external network and synchronizing network time to computer system time and RTC time based on a preset time synchronization tool; constructing a timing restart task based on a timing task mode of the computer system; disconnecting an external network to start a timing restarting task to restart the computer system; and acquiring the current RTC time after the timing restarting task is completed based on a preset time reading tool, comparing the current RTC time with the current network time, determining a comparison result and determining the accuracy of the RTC clock according to the comparison result. The beneficial effects of the invention are as follows: the automatic testing is realized, the labor cost is effectively reduced, and the testing efficiency is greatly improved.

Description

RTC clock accuracy verification method and device

Technical Field

The invention belongs to the technical field of computers, and particularly relates to a method and a device for verifying accuracy of an RTC clock.

Background

With the rapid advance of computer technology and the continuous emergence of computer network applications, accurate time synchronization of computers is becoming an increasingly important issue. Taking the Unix system as an example, the accuracy of time affects almost all file operations. If the time of a machine is inaccurate, for example, a file is built on a machine that is advanced from time and is checked using a corresponding check command, subtracting the displayed file modification time from the current time yields a time negative value, which is a disaster for the network file server, and the reliability of the file will not exist. To avoid local errors, the system clock is synchronized to the common source, although time is available from the network. Once this common time source is in error, the domino effect will occur and the time of all machines synchronized with it will therefore be in error.

In addition, the synchronization problem is even more important when security devices on the network are involved. The logs generated by these devices must reflect the exact time. Especially when processing busy data, it is almost impossible to correlate logs from different sources if the times are not synchronized. Security related tools are useless once log files are not correlated. An unsynchronized network means that enterprises have to spend a great deal of time manually tracking security events.

In order to ensure the accuracy of time synchronization, the problem of asynchronous is usually found and processed in time by adopting a method for testing the accuracy of the RTC clock in the computer, and the existing testing method mainly adopts a manual testing method, so that the number of testing times and the number of covered prototypes are limited, the labor cost is high, and the testing efficiency is low.

Disclosure of Invention

In order to solve the problems of high labor cost and low test efficiency in the prior art, the invention provides a method and a device for verifying the accuracy of an RTC clock, which have the characteristics of reducing the labor cost, improving the test efficiency and the like.

According to the embodiment of the invention, the RTC clock accuracy verification method comprises the following steps:

connecting an external network and synchronizing network time to computer system time and RTC time based on a preset time synchronization tool;

Constructing a timing restart task based on a timing task mode of the computer system;

Disconnecting an external network to start the timing restarting task to restart the computer system;

And acquiring the current RTC time after the timing restart task is completed based on a preset time reading tool, comparing the current RTC time with the current network time, determining a comparison result and determining the accuracy of the RTC clock according to the comparison result.

Further, the determining RTC clock accuracy according to the comparison result includes:

and if the time difference between the current RTC time and the current network time is larger than a first preset threshold value, proving that the RTC clock accuracy is not high.

Further, the determining RTC clock accuracy according to the comparison result further includes:

And if the time difference between the current RTC time and the current network time is larger than a second preset threshold value, acquiring the current computer system time after the timing restart task is completed, and comparing the current computer system time with the current RTC time.

Further, after the connecting the external network and synchronizing the network time to the computer system time and the RTC time based on the preset time synchronization tool, further includes:

And checking whether the RTC time and the computer system time are successfully modified or not based on the preset time reading tool, and if not, adopting the preset time synchronizing tool to synchronize network time again until the modification is successful.

Further, the connecting the external network and synchronizing the network time to the computer system time and the RTC time based on the preset time synchronization tool includes:

network time is synchronized to computer system time and RTC time based on rdate commands or ntpdate commands.

Further, the preset time reading means includes hwclock commands.

Further, the constructing the timing restart task based on the timing task mode of the computer system includes:

the crontab command is configured using a preset test script to build the timed restart task.

Further, the preset test script content comprises restarting times and restarting interval time.

Further, the preset test script content further comprises computer system time and RTC time after each restart.

According to an embodiment of the present invention, an RTC clock accuracy verification apparatus includes:

the synchronization module is used for connecting an external network and synchronizing network time to computer system time and RTC time based on a preset time synchronization tool;

the timing module is used for constructing a timing restarting task based on a timing task mode of the computer system, and disconnecting an external network to start the timing restarting task to restart the computer system; and

The judging module is used for acquiring the current RTC time after the timing restarting task is completed based on a preset time reading tool, comparing the current RTC time with the current network time, determining a comparison result and determining the accuracy of the RTC clock according to the comparison result.

The beneficial effects of the invention are as follows: the external network time is synchronized with the computer time and the RTC time by adopting a preset time synchronization tool, then a corresponding timing restarting task is constructed according to a timing task mode of the computer system to restart the computer system after network disconnection, and then the current RTC time after the restarting task is executed is compared with the current network time to finish the test of the accuracy of the RTC clock, so that the automation of the test is realized, the labor cost is effectively reduced, and the test efficiency is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of 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 drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flowchart of a method for RTC clock accuracy verification provided in accordance with an exemplary embodiment;

FIG. 2 is another flow chart of a method of RTC clock accuracy verification provided in accordance with an exemplary embodiment;

Fig. 3 is a schematic diagram of an RTC clock accuracy verification apparatus provided in accordance with an exemplary embodiment.

Reference numerals

1-A synchronization module; 2-timing module, 3-judging module, 4-modifying verification module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.

Referring to fig. 1, an embodiment of the present invention provides a method for verifying accuracy of an RTC clock, which specifically includes:

101. Connecting an external network and synchronizing network time to computer system time and RTC time based on a preset time synchronization tool;

RTC (real_Time Clock), usually called Clock chip, can provide accurate Real-Time reference for computer operating system, electronic system, etc., in the CPU of domestic computer, the framework of CPU can be Loongson, megacore, feiteng, kunpeng or sea light CPU, the computer system can be Linux system, and can be desktop version or server version, can synchronize computer system Time and RTC Time with network Time through the Time synchronization tool of computer system itself, and then guaranteed the consistency of network Time and RTC Time and system Time before the test.

102. Constructing a timing restart task based on a timing task mode of the computer system;

By adopting a timing task mode of the computer system, a corresponding timing restarting task can be constructed, and the computer system is restarted at fixed time, so that automatic restarting is realized.

103. Disconnecting an external network to start the timing restarting task to restart the computer system;

Before the test starts, the network connection of the computer can be cut off by pulling out the computer network, so that the computer system time can be stopped to automatically perform network synchronization, and the influence of external time on RTC time is cut off. And tests the RTC clock by restarting the system.

104. And acquiring the current RTC time after the timing restarting task is completed based on a preset time reading tool, comparing the current RTC time with the current network time, determining a comparison result and determining the accuracy of the RTC clock according to the comparison result.

After the timing restart task is completed, comparing the RTC time after the timing restart task is completed with the current network time to further determine a time difference, judging whether the RTC time is accurate or not according to the size of the time difference, and further judging the accuracy of the RTC clock. The automatic test device does not need to manually restart and other operations, so that the manual labor and labor cost are greatly reduced, and meanwhile, the automatic degree is higher, and the test efficiency is improved.

In order to improve the standardization of accurate determination, in another embodiment of the present invention the method further comprises:

And if the time difference between the current RTC time and the current network time is larger than a first preset threshold value, proving that the RTC clock accuracy is not high. For example, the first preset threshold may be set to typically 2 seconds, and once the error exceeds 2 seconds, the RTC clock accuracy of the testable machine is not high, since setting the error threshold for 2 seconds is a reasonable decision criterion considering that there is a time error problem in restarting the system.

And if the time difference between the current RTC time and the current network time is larger than a second preset threshold value, acquiring the current computer system time after the timing restarting task is completed, and comparing the current computer system time with the current RTC time.

The second preset threshold may be set to be 5 seconds or more in general, because considering the problem that there may be inconsistency between the network time and the computer system time during the restart test, which results in a large difference between the RTC clock and the network time after the restart task is completed, determining where the problem is located by comparing the RTC time with the system time again, if the system time and the RTC time can be identical, there may be time that is not synchronized when the network time and the computer time are synchronized, and further, the RTC time and the network time are caused to have a large difference, and a corresponding test may be performed after the synchronization again.

It will be appreciated that, according to different computer systems and different configurations of computer hardware, specific data of the first preset threshold and the second preset threshold may be set by those skilled in the art according to actual testing situations, and the present invention is not limited herein.

To further optimize the technical solution, avoiding the occurrence of the above situation, referring to fig. 2, in another embodiment of the present invention, the RTC clock accuracy verification method includes the following steps:

201. connecting an external network and synchronizing network time to computer system time and RTC time based on a preset time synchronization tool;

202. checking whether the RTC time is successfully modified or not based on a preset time reading tool, and if not, adopting the preset time synchronizing tool to synchronize the network time again until the modification is successful;

203. constructing a timing restart task based on a timing task mode of the computer system;

204. Disconnecting an external network to start a timing restarting task to restart the computer system;

205. And acquiring the current RTC time after the timing restarting task is completed based on a preset time reading tool, and comparing the current RTC time with the current network time.

After the external network is connected to synchronize the computer system time and the RTC time, a preset time reading tool is adopted to check whether the RTC time and the computer system time are successfully modified, so that corresponding verification can be immediately carried out after the network time synchronization is completed, the conditions of restarting the task test without time synchronization completion, time waste and the like are avoided, and a guarantee is provided for the subsequent restarting of the task test.

The verification method of the present invention will be specifically described with reference to the linux computer operating system, after the linux system is installed on the computer, the computer is connected to the external network, and before the test is started, the external network needs to be connected to synchronize the system time and the RTC time, and the network time can be synchronized to the computer system time and the RTC time by using the rdate command or the ntpdate command.

Wherein rdate is used to obtain the time-consuming, on-band-s parameter on the remote time server, and the obtained time can be applied to the local system, and the corresponding procedure is as follows:

-s Set the system time to the returned time.

-u Use UDP instead of TCP as the transport.

-l Use syslog to output errors(cron.warning)and output(cron.info).

-t Set timeout in seconds for every attempt to retreive date.

ntpdate is a tool for synchronizing time, and the specific procedure is as follows:

Disclaimer:The functionality of this program is now available in the ntpd program.See the-q command line option in the ntpd-Network Time Protocol(NTP)daemon page.After a suitable period of

mourning,the ntpdate program is to be retired from this distribution。

Then, using hwclock command to check whether the RTC time is successfully modified and consistent with the current network time, hwclock command is a hardware clock access tool, which can display the current time, set the time of the hardware clock, set the hardware clock as the system time, and also set the system time as the time of the hardware clock, and specific command options are:

-s: synchronizing the hardware clock to the system clock;

-w: synchronizing the system clock to the hardware clock;

For example: [ root@localhost ] # hwclock-w, represents synchronizing time to the computer system clock.

Finally, a restarting test mode of a linux timing task mode is used, a restarting interval is set to be a plurality of minutes, for example, the restarting interval is 1 minute, the restarting times can be set for self, for example, 1000 times, after 1000 times of tests are completed, hwclock commands are used for checking the RTC time after the tests are completed, and if the difference between the current RTC time and the network time exceeds 2 seconds, the RTC clock accuracy of the tester is proved to be not high.

The timed restart task may use a preset test script to configure a crontab command to construct the timed restart task. The preset test script content comprises the restarting times and the restarting interval time of each time.

The preset test script content also includes computer system time and RTC time after each restart is recorded.

Specifically, after logging in the linux system and obtaining the root authority, the test script may be used to configure a timing task of the crontab, where a crontab command is commonly found in Unix and Unix-like operating systems, and is used to set a periodically executed instruction. The command reads instructions from the standard input device and stores them in a "crontab" file for later reading and execution.

By creating a configuration file/home/reboot-cron that modifies the timing tasks, the input content line input */1****root date>>/home/date.log;hwclock>>/home/date.log;reboot;bash/home/reboot-stop.sh, inputs: wq saves and exits the configuration file. The input command crontab/home/reboot-cron creates a timed task, representing the meaning of restarting the system 1 time every 1 minute. And the system time and the RTC hardware time are recorded, so that the comparison of time after the test is finished is convenient. And judging the restarting times of the log records by running a reboot-stop.sh script, and automatically deleting the timing tasks after testing 1000 times. The contents of the reboot-stop.sh script are as follows:

After the test starts, the network line is unplugged and disconnected, and the network synchronization is automatically performed at the stop time. After 1000 times of testing, the reboot-stop.sh script automatically deletes the timing task to stop testing. And the count2 is the counted test times, after the test is completed 1000 times, the if else judgment statement automatically judges true, the crontab-r deletion timing task is executed, and the restarting test is stopped.

After 1000 tests are completed, hwclock commands are used for checking the RTC time after the tests are completed, and if the current RTC time and the network time are different by more than 2 seconds, the RTC clock accuracy of the tester is proved to be not high. If the time difference is relatively large, the log of/home/date. Log is viewed. The date acquired system time is compared with hwclock acquired RTC time.

It should be noted that, the restart times and the interval time in the above-mentioned timing restart task can be set by a person skilled in the art according to the actual test requirement, and the present invention is not limited herein.

Fig. 3 is a schematic structural diagram of an RTC clock accuracy verification apparatus according to some embodiments of the present invention, where the apparatus is adapted to perform a specific flow of an RTC clock accuracy verification method provided by the embodiments of the present invention. As shown in fig. 3, the apparatus may specifically include:

The synchronization module 1 is used for connecting an external network and synchronizing network time to computer system time and RTC time based on a preset time synchronization tool;

the timing module 2 is used for constructing a timing restarting task based on a timing task mode of the computer system, and disconnecting an external network to start the timing restarting task to restart the computer system; and

The judging module 3 is configured to obtain a current RTC time after the completion of the timing restart task based on a preset time reading tool, compare the current RTC time with a current network time, determine a comparison result, and determine RTC clock accuracy according to the comparison result. And

And the modification verification module 4 is used for checking whether the RTC time and the computer system time are successfully modified based on the preset time reading tool, and if not, adopting the preset time synchronization tool to synchronize the network time again until the modification is successful.

The RTC clock accuracy verification device provided by the embodiment of the invention can execute the RTC clock accuracy verification method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.

According to the RTC clock accuracy verification method and device provided by the embodiment of the invention, the corresponding timing restarting task is constructed according to the timing task mode of the computer system, so that an automatic test scheme is realized, the labor cost is effectively reduced, and the test efficiency is greatly improved.

Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.

The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing description includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, as used in the specification or claims, the term "comprising" is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean "non-exclusive or".

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for verifying accuracy of an RTC clock, comprising:

Acquiring the current RTC time after the timing restart task is completed based on a preset time reading tool, comparing the current RTC time with the current network time, determining a comparison result and determining RTC clock accuracy according to the comparison result;

The determining the accuracy of the RTC clock according to the comparison result includes:

if the time difference between the current RTC time and the current network time is larger than a first preset threshold value, proving that the accuracy of the RTC clock is not high;

The determining the RTC clock accuracy according to the comparison result further includes:

2. The RTC clock accuracy verification method of claim 1, further comprising, after said connecting the external network and synchronizing the network time to the computer system time and the RTC time based on a preset time synchronization tool:

3. The RTC clock accuracy verification method of claim 1, wherein the connecting the external network and synchronizing the network time to the computer system time and the RTC time based on a preset time synchronization tool comprises:

4. The RTC clock accuracy verification method of claim 2, wherein the preset time reading tool includes hwclock commands.

5. The RTC clock accuracy verification method of claim 1, wherein the computer system-based timed task mode construction of the timed restart task includes:

6. The RTC clock accuracy verification method of claim 5, wherein the preset test script content includes a number of restarts and a time interval between each restart.

7. The RTC clock accuracy verification method of claim 6, wherein the preset test script content further includes a computer system time and an RTC time after each restart.

8. An RTC clock accuracy verification apparatus, comprising:

The judging module is used for acquiring the current RTC time after the timing restarting task is completed based on a preset time reading tool, comparing the current RTC time with the current network time, determining a comparison result and determining RTC clock accuracy according to the comparison result;