on delay vs off delay

Precise delay of c51Some friends suggested that the accuracy of 51 Single-Chip Microcomputer delay program using C language is not enough. In fact, the C language is eventually compiled into an assembly language for running, so the assembly program will be very large, this affects the precision of latency. Here, we will post some online materials for your reference.The following content is reprinted:A Simpl

translate a useful article about 300ms delay in Mobile browser, the original address http://updates. Html5rocks.com/2013/12/300ms-tap-delay-gone-away Remove 300ms Click Latency on your mobile device browserYou can find a lot of articles on the website about reducing 10ms or 90ms in order to have a fast and smooth website user experience somewhere. Unfortunately, on a touchscreen-based cross-platform mobile

I have done the system, separate stand-alone system (2005), CS System (2010), Real-time system (2015), each system has a "delay" function: scheduled scheduling; This blog is about the delay function in real-time systems (based on the Unity3d game engine).In Unity3d, the new script inherits Monobehaviour by default, where the update function is automatically dispatched by the engine, such as on my computer,

Frontend programming improvement journey (9) ---- delay object, journey ---- Recently, we have made an internal recommendation project. When we enter the project homepage, we need to determine the pre-called interface. According to past habits, we should put the code executed after the called interface into the ajax request success for execution. This is certainly acceptable, but the code organization and readability are not that high. You can view th

11.3.4 delay values in F #The delay values (lazy value) in F # are represented by a lazy calculation, that is, only if the value is needed. In the previous section, we implemented a similar function with C # functions, and the delay values were automatically computed only once and the results were remembered.The best way to explore this functionality is in F # In

A lot of people are using Nodejs settimeout (callback, delay[, arg][, ...]) When writing timed tasks, it is customary to directly manipulate callback objects outside the object (characteristics of closures). There is a hidden danger that when callback is actually executing, the external object objects may have been destroyed (such as a custom destruction method), resulting in a great deal of deviation from the processing of object, and the program may

Always thought that my C language can still, although not superb, but at least more familiar with it. But a while ago read a tweet, and then Baidu a bit of C language is not the exact type. Found me. C language is not completely type and the use of a very wide range of delay definitions have no concept. These two days looked closely at the relevant concepts and experimented with the code.This article is structured as follows: Introduction to

Delay Operation:Long delay, longer than a tick of time.Busy waiting:By monitoring the Jiffies register implementationwhile (Time_before (JIFFIES,J1))Cpu_relax ();The implementation of Cpu_relax () is related to the platform, and most departments do not do anything at all, and on symmetric multithreaded systems, the processor may be ceded to other threads.If interrupts are disabled before entering the loop,

In many cases, our program, before performing the next step, will need to wait for the execution of the previous one, which is most evident in the asynchronous operation, or in the program that uses the message loop mechanism to communicate. An example of an API: Our own program is a, need to use API combined with Windows message mechanism, control external program B; A send a message to B, B to execute, at this time a need to wait for B execution, according to B's execution result, again sen

data conforms to the constraint. It is important to note that DML operations on the table cannot be followed, such as: ALTER TABLE Tb_name Disable validate constraint constraint name ;. You can also use the keyword novalidate to not validate existing data (default, omit is not verified), such as: ALTER TABLE Tb_name Disable novalidate constraint constraint name ;Enable constraintsALTER TABLE Tb_name Enable constraint constraint name ; If cascade is used when the primary KEY constraint is turned

Summary of delay commands for simulating packet loss in centosSummary of delay commands for simulating packet loss in linux:First, run the ifconfig command.1. Set latencyLatency: sudo tc qdisc add dev eth0 root netem delay 30 msLatency in the range (10-50 ms): sudo tc qdisc add dev eth0 root netem delay 30 ms 20 msSet

Formula for propagation delay of cabling in PCB The first half is information from altera. The propagation latency (tPD) is the time required to transmit a signal from one point to another. Transmission Line propagation delay is a function of the relative dielectric constant of materials. Propagation delay of micro-Strip Layout You can use formula 5 to calculate

Simulate the network packet sending and receiving delay for the specified IP port on Linux. When compiling network applications, we usually test and debug the network on a LAN or even a local machine. Is there a way to simulate a complex Internet environment-especially network latency-for applications without modifying their own code in an Intranet environment with good network conditions? This was my idea when I was writing network programs at school

-(void) initblock{Method of delay1:GCD delay this way in the ability to select the thread to run in the number of parameters.is a non-clogging operation that does not find a way to cancel the operation.Double delay1=2.0;//setting delay timedispatch_time_t poptime=dispatch_time (Dispatch_time_now, delay1 * nsec_per_sec);Dispatch_after (Poptime, Dispatch_get_main_queue (), ^{Uialertview *alert=[[uialertview a

. NET development so far, in fact everywhere have "delay (Lazy)" Traces, a small "laziness" to bring us a lot of flexibility 1. The key to "delay" is "processing data only when needed", and Lao Zhao has mentioned similar concepts in several articles, such as higher-order functions, delegates and anonymous methods, and "Are you good at using anonymous functions?" 》。 However, the "

This article discusses the time-delay techniques involved in discovering SQL injection issues from the perspective of interacting with Web apps using a browser.When testing an application for SQL injection vulnerabilities, it is often found that a potential vulnerability is difficult to confirm. This may be due to a variety of reasons, but it is primarily because the Web app does not display any errors and therefore cannot retrieve any data.In this ca

The C language code below uses a function that generates random numbers, and a delay function. Please carefully observe its display effect. From the following code, we can draw an important conclusion: when the above two kinds of functions are put into the loop, we should make some changes. Also focus on the definition of its parameters (outside of the child function?). Inside the child function? Global variable? Local variables? ）。 Also note: scanf

Unit 9 Kernel Timing and Process Latencykernel timing and process delayLearning Goals:A. Understanding how the CPU tracks the time B. Adjust the number of CPU accesses c. Adjust schedule delay D. CPU task tuning on virtual machines9.1How Linux tracks time Linuxunder the time trackingA. A hardware timer is timed by using a clock. Includes the following time resources: A. Real Time Clock (RTC): The realtime clock is the device used to keep the system ti

Here, let me discuss the problem of using __delay_cycles delay for MSP430 MCU.The IAR for MSP430 compiler provides a compiler inline precision delay function (not a truefunction) to provide the user with a precise delay, the function prototype is:__intrinsic void __delay_cycles (unsigned long __cycles);This intrinsic function implements the

Often see settimeout delay 0ms JavaScript code, feel very confused, is it not a delay of 0ms and no delay is not a reason? Later through the investigation of data and experiments to obtain the following two roles, may also have a role I do not know, hope to know that friends in the comments on the back of the generous point.1, realize the asynchronous JavaScript;