nanosecond clock

Picosecond, Symbol PS (English: picosecond).1 pi seconds equals one-zero seconds (10-12 seconds)1,000 picosecond = 1 nanoseconds ns1,000,000 picosecond = 1 microseconds μs1,000,000,000 picosecond = 1 msec μs1,000,000,000,000 picosecond = 1 seconds sNa-Secnanosecond, sign NS (English: nanosecond).1 nanoseconds equals One-zero seconds (10-9 seconds)1 nanoseconds = 1000 picosecond 1,000 nanoseconds = 1 microseconds μs1,000,000 nanoseconds = 1 msec ms1,00

1) create a VC. NET hosted class library Using namespace System; Namespace MLTimerDot { // Obtain the clock cycle from the computer startup to the present Unsigned _ int64 GetCycleCount (void) { _ Asm _ emit 0x0F _ Asm _ emit 0x31 } // Declare the. NET class Public _ gc class MLTimer { Protected: UInt64 m_startcycle; UInt64 m_overhead; Public: MLTimer (void) { // To calculate the more precise time period for calling a GetCycleCount () call M_overhead

Do_settimeofday timekeeping module. Posix_clock_realtime_adj is to invoke the Do_adjtimex interface function to implement the specific function.The nanosecond level of sleep is achieved through a high-precision timer, real time clock precision and hrtimer correlation, in particular, can refer to Hrtimer related documents.2. monotonic clock is defined as follows:

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

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

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

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

. currently, there are three clock interrupt processing methods in the kernel: periodic, highres, and dynamic tick. it will be introduced later. Hrtimer timer WheelFirst, let's talk about timer wheel. It is the jiffies-based timer mechanism used by kernel. The interfaces include init_timer (), mod_timer (), del_timer (), etc.The emergence of hrtimer does not discard the old timer wheel mechanism (or it is unlikely to discard it :)). hrtimer is used a

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

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

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