microseconds

Transferred from: http://blog.csdn.net/cybertan/article/details/8258394This article explains how to set up Ftrace and is able to understand how to trace functions. It should is useful for the current kernel developers and device driver developers

Using boost to get the current time is quick and easy, and you don't have to think about cross-platform issues.1. Output YYYYMMDD[CPP]View Plaincopy #include #define Boost_date_time_source std::string strtime =

Timestamp class Date class TimeZone class First, learn about a structure of time and a function to get time.#include struct timeval { __time_t tv_sec; /* Seconds. */ __suseconds_t tv_usec; /* Microseconds. */ Tv_sec

The following small series for everyone to share an article on the use xhprofFind examples of PHP performance bottlenecks, xhprofis an extension of the test PHP performance developed by Facebook, which documents the use in PHP

A performance bottleneck typically refers to a developer's newly developed application. For example Applications developed in Java or C that are deployed on the application server for user transaction request processing. For example A developer has

This is a creation in Article, where the information may have evolved or changed. Go is a very real programming language that provides detailed information about the state of the operation from the very beginning. After the product on-line tuning

Previous time a requirement: a customer submits a simple form to create a scratch card activity H5 page that adapts to the full terminal (Pc,pad,phone), which involves the ability of a customer to generate a quota 6W prize code online. Since it is

See this name, is not a very high-level feeling. Yes, the Magic method is really advanced. So, what is a magic method? The method, which begins with two underscores in PHP, is known as the "Magic Method" (Magic methods). such as __construct (),

This article Toceansoft technology, please pay attention to myEven if you use PHP for many years, you will occasionally discover functions and functions that you have never known. Some of them are very useful, but they are not being fully utilized.

Xhprof is a PHP performance analysis and debugging tool developed and maintained by a Facebook engineer, which is more lightweight and resource-efficient than xdebug, and is highly recommended for everyone. The following article mainly introduces

9 required Practical PHP functions and functions This article introduces toceansoft.Even if you have been using PHP for many years, you may find some functions and functions that you have never understood. Some of them are very useful, but

PG processing time is very flexible, +-*/both have supportIt's useful to have a extract function in the meantime, let's take a look at a few examples: [code]postgres=# Select Extract (Epoch from ' 1970-01-01 ':: timestamp);Date_part-----------0(1

Transfer from http://jinren1010.spaces.eepw.com.cn/articles/article/item/15556　　(1) The basic unit of flash memory chip read and write different applications on nor chip operation with " word " as the basic unit. In order to facilitate the

Timeval Description The functions gettimeofday and settimeofday can get and set the time Well as a timezone. The TV argument is Timeval Struct, as specified in : Struct Timeval {Time_t TV _sec;/* seconds */Suseconds_t TV _usec;/* microseconds

The current idea is this: When the user participates in the second kill and then inserts all the users into the database, and then polls the time by polling until the timer is zero, which is the second kill, Polling time is one second, the problem

Pause code Execution in PHP for a certain time, there are two functions can be implemented, one is sleep (), the other is usleep (), their parameters are an integer value. Sleep () is how many seconds are paused, and usleep () is how many

Use XHProf to find the PHP performance bottleneck instance, xhprofphp XHProf is an extension developed by facebook to test php performance. This article records how to use XHProf in PHP applications to optimize PHP performance and find performance

Installation and use of the PHP performance analysis tool xhprof and precautions Preface Xhprof is a PHP performance monitoring tool open-source by facebook. It occupies a small amount of resources and can even be deployed in a production

About the second-kill program The current idea is this: When the user participates in the second kill and then inserts all the users into the database, and then polls the time by polling until the timer is zero, which is the second kill, Polling

Application:#include Usleep (n)//n μsSleep (n)//n msSleep (N)//n secDrivers:#include Mdelay (n)//milliseconds its implementation#ifdef NOTDEF#define MDELAY (n) (\{unsigned long msec= (n), while (msec--) udelay (1000);})#else#define MDELAY (n)