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======================================================================== This was about Time sync issue: root@itqe-t5-2-2-zn1:~# Date Thursday, December 4, 10:25:07 AM UTC root@itqe-t5-2-1-zn1:/u01/app/12.1.0.2/grid/bin # Date Thursday, December 4, 10:02:51 AM UTC =============================================================================================
Solution:so we must have the both node as NTP clients
In a recent project, a high-precision real-time clock is required under VxWorks, with a precision of 1ms and an overflow time of more than 5 hours. The VxWorks provides a system clock that starts counting after the operating system starts, with a precision of 1 ticks, and can get the current count value through Tickget
The time object as a very important object, for us to learn. NET, not very important, but this does not mean that we can ignore, in fact, when the need is still a lot of, if completely dependent on the JS processing time, it will be problematic, because JS always assume that the time on the local machine is correct. There is another reason, he always according to
In the 24 hours of a day, how many times does the hour, minute, and second hands of the clock overlap? What is the time? How did you calculate it?
Only twice.Assuming that the hourly rate is ω (ω = 2 π/12 hours = π/6 hours), the sub-needle's angular velocity is 12 ω (12 ω = 2 π/60 minutes ), the second-hand angular velocity is 72 ω (72 ω = 2 π/60 seconds ).Assume that the
Time Protocol (NTP), a protocol designed to synchronize the clocks of computers over a network, for policyears. NTP Version 3 is a standard protocol ormalized in RFC 1305 protocol hat uses the user datateprotocol (UDP) and Port 123.
Unlike PCs or servers, Cisco network devices specifically need to run NTP to synchronize the time and date. That's because most Cisco devices don't have an internal
This article mainly introduces how to use the clock () method for processing time in Python. It is the basic knowledge of getting started with Python. For more information, see clock () method returns the current processor time, in seconds representing a floating point number on Unix. The accuracy depends on the C func
How can we solve the inconsistency between the time obtained by date and clock ?, Dateclock
[Root @ localhost ~] # Clock
Sun 25 Feb 2018 12:36:09 am cst-0.016252 seconds
[Root @ localhost ~] # Date
Sun Feb 25 18:49:44 CST 2018
The output time of clock and date is incons
Document directory
RTC interrupt service program
Reprint address (this article is also reproduced): http://blog.chinaunix.net/uid-15443744-id-2772596.html
Each pc has a Real-Time Clock device. When you turn off the computer power, it maintains the system's date and time information.
In addition, it can also be used to generate periodic signals with a frequ
In Linux, the support for S3C2440 RTC is very complete. We only need to make simple modifications to use RTC.
1. vi arch/ARM/mach-s3c2440/mach-smdk2440.c
Static struct platform_device * smdk2440_devices [] _ initdata = {
Initi_device_usb,
Amp; cloud_device_ LCD,
Amp; cloud_device_wdt,
Amp; cloud_device_i2c0,
Amp; cloud_device_iis,
Initi_device_rtc, // here we add the RTC platform device, which is not added by default.
};
2. Make zimage
3. Use and Test
Linux
-Gewei = time% 10 - in forIinchRange (0, 3): -Et[i] = Lcd[shiwei][i] +Lcd[gewei][i] to + returnet - the #Time.localtime () is a tuple that outputs the current date * #T.tm_hour is when the t.tm_min is minutes $ #The most critical part of this function is to separate the previousPanax Notoginseng #the list elements of the seconds are assembled into a list, which is then printed uniformly. - the defclock (): +t =time.localtime () Ah =NU
The current B/S project has a requirement: display the server time clock in the browser. It would be easy to display the client clock, but the server segment clock would be displayed ....... The page cannot be refreshed every second. The first idea is to get the time differe
Ngxin project, which has a Windows version. to optimize performance, use timegettime (); to obtain the time.
As a result, the clock is unstable, and the clock does not run after a period of normal operation, or times out.
An error occurs when timegettime () is used to obtain the returned value. According to msdn, this function cannot be used directly for code ope
Human biological clock schedule:
PM-PM: It is time for the immune system (lymphatic) to detoxify. This time period should be quiet or listen to music.
PM-PM: It is the time when the liver is detoxified. You must stay asleep.
Am-Am: It is a brave time for detoxification, a
Recent projects need to use a time selector, the previous use of the Bootstrap-datetimepicker in the selection date is fine, but its time to choose (Time: points) is a bit awkward, and later found that the Android up alarm when the selector is very good, So I decided to develop a similar time selector for the analog
We open a thread, the thread sends a message every second, and we update the time displayed on the TextView in the message OK.
First we put a textview in the layout file to display the time, as follows:
Copy Code code as follows:
Xmlns:android= "Http://schemas.android.com/apk/res/android"
Android:layout_width= "Match_parent"
android:layout_height= "Match_parent"
Android:background= "
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