microseconds

OPS needs to record the "slow action" commands in the master Redis and then find the relevant business party, otherwise, blockIt's not funny anymore. The relevant commands are then found directly in the Redis Handbook.SLOWLOG subcommand [argument]

Instance shutdown commandREDID-CLI shutdown Description: Forced bgsave on close so it takes some time note: At start, you need to load the data into memory before Redis listen the port after the data is loadedCluster-related commands1. CLUSTER Info

Data Packet sockets I don't want to talk more, so I will give Code Talker. C and listener. C. The listener waits for packets from Port 4590 on the machine. Talker sends data packets to a certain machine, which contains the content entered by the

Android development: Android device sensor Development Summary  Android sensor development process Public class sens?ti=extends Activity implements SensorEventListener {private SensorManager mSensorManager; private Sensor mSensor; @ Override public

[RK_2014_0918] in linux, test the impact of usleep function on CPU usage. rk_2014_0918usleep 1. Local Environment CPU information Intel (R) Core (TM) i3 cpu m 350 @ 2.27 GHz Intel(R) Core(TM) i3 CPU M 350 @ 2.27GHz Intel(R) Core(TM) i3 CPU M 350

In summary, it is like a power report! The power generation report is also a line. Different signals are expressed through the long segment of the ticking sound. This is exactly how 1wire works!       In conclusion, 1wire maintains a high level

The module representing time in Python is datetime, which introduces the following moduleDatetime,timedeltaDatetime.today () #打印出当前的时间E:\python2.7.11\python.exe e:/py_prj/python_cookbook.py2017-04-26 21:58:05.663000We can also add and subtract time.

The DateTime module defines the following classes: Datetime.date: A class that represents a date. The commonly used attributes are year, month and day; Datetime.time: A class that represents time. The commonly used properties are hour,

Reference: http://www.cnblogs.com/krythur/archive/2013/02/25/2932647.htmlThe first chapter gets the time function1. Char * asctime (const struct TM * timeptr);Function descriptionAsctime () Converts the information in the TM structure referred to by

The following is an excerpt from the man file under Linux: (Man Getitimer)#include int Getitimer (int which, struct itimerval * curr_value);int Setitimer (int which, const struct itimerval * new_value, struct itimerval * old_value);Describe:Linux

Timedalte is an object in DateTime that represents the difference constructor for two times: Datetime.timedelta (days=0, seconds=0, microseconds=0, Milliseconds=0, Minutes=0, Hours=0, weeks=0)Where the arguments are optional, the default value is

MongoDB is now getting more and more fire, to do a good job of mongodb monitoring needs to be from its installation configuration, to the simple command statement to use, and then to its operation mechanism and State acquisition method

1:sleep ()The minimum unit of seconds.When using Sleep/ulseep/select, because the thread will go to sleep state, and then wake up, if the single execution problem is not small, if the number of cycles executed more, then the difference is very large.

A few days ago in the embedded Linux used to Alsa command, on-line check the data do not give force, only a little bit to check, and finally can use, will this use method to tell everyone, lest everyone less detours.0. First check which ALSA cmd the

The use cases for generating unique IDs are very common, such as temporary cache file names, temporary variables, and temporary security codes. The uniqid () function is based on the current time in microseconds, generate a unique ID. Because the

1. The return unit is milliseconds. # Include DWORD dwstart = gettickcount ();// Test code DWORD dwtime = gettickcount ()-dwstart; Note: gettickcount () has a limited precision, which is related to the CPU. Generally, the accuracy is around 16 ms,

I. Introduction To evaluate the performance of a system, there are usually different indicators and different tests accordingly MethodAnd testing tools. Generally, to ensure the fairness and authority of testing results, relatively mature commercial

# Include # Include # Include # Include # Include # Include # Include # Include /* Set the default value */ # Define default_freq 10000/* set an appropriate frequency */ # Define default_length 1000/* 200 microseconds. The

1. HC-SR501 Human Body infrared sensor module test     // Infrared sensing // Signal to port 7 Int Ledpin = 7 ; VoidSetup (){Pinmode (ledpin, input );Serial. Begin (9600);//Open the serial port and set the baud rate to 9600 bps.

PHP5 common function list overview. The usleep () function delays code execution in several microseconds. The unpack () function unpacks data from binary strings. The uniqid () function generates a unique The usleep () function delays code