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Java Precise MeasurementCodeRunning time: Long starttime = system. nanotime (); // start timeFor (INT I = 0; I ;}Long consumingtime = system. nanotime ()-starttime; // time consumedSystem. Out. println (consumingtime );System. Out. println (consumingtime/1000 + "microsecond "); JDK explanation: Public static longNanotime() Returns the current value of the most precise available system timer, in nanoseconds. This method can only be used
accelerator can exist 1 picosecond before decay. The average presence time of intermolecular hydrogen bonds in room temperature is 3 picosecond.One nanosecond (One-zero seconds 10-9 second)The light travels only 30 centimeters (less than one step) in a vacuum in a nanosecond. The microprocessor of the PC executes a command (e.g. adding two numbers) to approximately 2 to 4 nanoseconds. Another rare subatomic particle K-meson has a time of 12 nanosecon
-bit... Here _ declspec (naked) is not required .. As mentioned above. The key is the rdtsc command (read time stamp counter) to obtain the high-precision timestamp of the CPU. You can also write as follows: _ Declspec (naked) unsigned _ int64 getcpucycle (void){_ ASM{_ ASM _ emit 0x0f_ ASM _ emit 0x31RET}} This is equivalent to the machine code that is directly pushed into the command. The original post said that rdtsc cannot be recognized in the C ++ inline assembly compiler. I can do it an
Http://blog.sina.com.cn/s/blog_68f909c30100pli7.htmlReal-time Clock: RTC Clock, which provides real time information for years, months, days, hours, minutes, seconds, and weeks, powered by a back-up battery, and RTC still maintains the correct time and date when you shut down the system at night and open the system in the morning.System clock: Is a logical
First look at a STM32 clock system block diagram In STM32, there are five clock sources, namely HSI, HSE, LSI, LSE, PLL. HSI internal high-speed RC oscillator clock, 8mhz;hse, external high-speed clock, 4M__16MHZ;LSI, internal low-speed RC clock, 40KHZ; LSE external low-sp
1.Q: What is the system clock. What is a clock system. A: Usually referred to as the system clock refers to the clock system, which is the oscillator (signal source), timing wake-up, frequency divider and other components of the circuit. The commonly used signal sources are crystal oscillators and RC oscillators. 2.Q
15 ultra-powerful CSS3 disc clock animations and css3 disc clock animations Clock plug-ins are often used on webpages, especially personal blogs. A personalized clock plug-in not only makes the page look beautiful, but also allows visitors to see the current date and time. Today, we have collected 15 ultra-powerful dis
Pulse Signal Generator with a very accurate and stable frequency. The frequency is represented by "F" in a mathematical expression. The corresponding units are Hz, kHz, MHz, and GHz ). 1 GHz = 1000 MHz, 1 MHz = 1000 kHz, 1 kHz = 1000Hz. The time units for calculating the pulse signal cycle and their corresponding conversion relationships are: S (seconds), Ms (milliseconds), μs (microseconds), NS (nanoseconds ), AMDFxw.cpu has the highest default
Not much understanding of the FPGA global Clock, thus reprinted a document:Http://xilinx.eetop.cn/?action-viewnews-itemid-42At present, synchronous sequential circuits are generally recommended for large designs. The synchronous sequential circuit is based on the design of Clock trigger, which puts forward higher requirements for clock cycle, duty ratio, delay an
Pending correction 1.Clock Skewclock Skew = Clock path delay to the destination synchronous element-clock path delay to TE source synch ronous element.Note that clock skew only mentions path delay, but in practice the phase of the clocks may be different for destination synchronous element and source synchronous elemen
In the process of using Linux, you may encounter system clock and hardware clock inconsistency, that is, Date,hwclock--show see the clock is inconsistent. The Linux clock is divided into system clocks (systems Clock) and hardware (real time
In the process of using Linux, you may encounter the system and hardware clock inconsistent, that is, Date,hwclock--show see the clock is inconsistent. The Linux clock is divided into system clocks (systems Clock) and hardware (real time Clock, short RTC) clocks. The system
The Linux clock is divided into the system clock and the hardware clock (Real time clock, referred to as RTC). The system clock is the clock in the current Linux kernel, while the hardware clo
Watch Yu Qiao The video of the teacher, referring to the above questions, carefully search under the research:It is forbidden to use the counter-divided signal as the clock of other modules, but to change the clock to enable the way. Otherwise, the way the clock is flying is extremely detrimental to the reliability of the design and greatly increases the complexi
Js Canvas circular clock tutorial, jscanvas circular clock Reading this article requires some basic information about the basic usage of canvas. This article provides an example of a simple tutorial on implementing circular clock in HTML5 Canvas. Step 1:Create a simple html file and define the element canvas in the Canvas.html After this step, open canvas.html
The timing function in C/s + + is clock (), and its associated data type is clock_t.In MSDN, the clock function is identified as follows: clock_t clock (void); This function returns the number of CPU clock timing units (clock tick) between the time the "start this program pr
Simple game control logic Clock and logic clock Source: http://blog.csdn.net/u010019717 Author: Sun Guangdong time: In unity, coroutine can provide latency functions. But most of the time we don't want to use it, so we can control the time in Update. So I encapsulated this class. To use this clock, first instantiate it, call the Reset function to set the correct
Shutdown alarm Clock must be a mobile phone can be realized, or the phone is not the battery must not start OH. 1.a3000 mobile phone Standby interface as follows, we click on the desktop "Application" icon, open access.2. Then you will see a lot of features in our click on the "clock" option to open the entry. 3. Then we click on "Alarm Clock" and click on
The shutdown alarm clock is on the phone's alarm clock on a simple operation can be achieved, of course, if the phone is no electricity must also not open the machine. 1. We click "Application" in the status of mobile phone standby and find "clock" to open into details as follows. 2. After we click "Alarm Clock" in
Use HTML5 canvas for a clock. Use html5canvas for a clock. For H5, canvas is one of its most distinctive features. With it, we can draw various images on the web page and make some games. The usage of the canvas label is also described in many tutorials on the Internet. Today we will use canvas for a small clock. Complete code can be found at https://github.com/w
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