v thread tool

Recently, sysbench has been used for many performance tests. It also summarizes its features and usage and precautions. Sysbench is a multi-thread performance testing tool that can perform performance tests such as CPU, memory, IO, and database. However, most of the time I use it to perform oltp tests on databases (MySQL. What can it test and how can it help me to answer the question.~ /Zbs $ sysbench -- he

resources or critical sections. It is used to synchronize one or more threads that perform multiple tasks. It can only be used once. As previously explained, any call to its method is invalid once the Countdownlatch counter reaches 0. If you want to synchronize again, you must create a new object.The Countdownlatch class has another version of the await () method, which is: Await (long time, timeunit unit): This method sleeps until it is interrupted, the Countdownlatch internal counter

Mydumper is a multi-threaded export and import tool written in C language, and can ensure consistency between multiple tables. Of course, the more threads, the better (this configuration with the server, etc. Mydumper is a multi-threaded export and import tool written in C language, and can ensure consistency between multiple tables. Of course, the more threads, the better (this configuration with the serve

This article is a summary of learning about articles on the web. Thank you for your selfless sharing.JDK 1.7 has added a new tool, Phaser. The function of the Phaser is partially coincident with the Countdownlatch.The following uses the Phaser class to synchronize 3 concurrent tasks.These 3 tasks will search for files with a. log extension in 3 different directories and their subdirectories.This task is divided into 3 steps:1. Obtain a list of files w

Axel is a multi-thread download tool under the command line. it supports resumable data transfer, which is usually several times faster than Wget. Its official website: Alibaba... Axel is a multi-thread download tool under the command line. it supports resumable data transfer, which is usually several times faster tha

A very typical application scenario for Countdownlatch is that there is one task that wants to go down, but it must wait until the other tasks have been completed before proceeding. If we want to continue down the task of calling an await () method for a Countdownlatch object, the other task executes its own task and calls the countdown () method on the same Countdownlatch object, which calls await () The task of the method will block waiting until the count of the Countdownlatch object is reduc

/*. Net/C #: implement the Http Web Client tool class that supports resumable download of multiple threads (C # DIY HttpWebClient)* Reflector: The System. Net. WebClient is reloaded or added:* DownLoad and Upload Methods!* Great changes to DownLoad!* Added DataReceive and predictionoccurrs events!* For more information about the HTTP protocol used for server-client interaction, see:* Enables custom connections for file downloads to support resumable m

/*. Net/C #: implement the Http Web client tool class that supports resumable download of multiple threads (C # DIY HttpWebClient)* Reflector: the System. Net. WebClient is reloaded or added:* DownLoad and Upload methods!* Great changes to DownLoad!* Added DataReceive and predictionoccurrs events!* For more information about the HTTP protocol used for server-client interaction, see:* Enables custom connections for file downloads to support resumable m

;} @Overridepublic void Run () {System.out.printf ("%s:going to print a job\n", Thread.CurrentThread (). GetName ()); Printqueue.printjob (New Object ()); System.out.printf ("%s:the document has been printed\n", Thread.CurrentThread (). GetName ());}}Package Chapter3;public class Main {/** * Can modify the fairness of the semaphores, in the default case the entry of the semaphore is not fair. If the second parameter of the initialization is set to true, the time-to-wait entry is selected.Referen

Today, mysqldump is used online to import data tables from one database to another. The export speed is very slow. So I searched the internet and found this stuff. After the test, I found it was good. I will share it with you. Brief IntroductionMydumper is a multi-threaded export and import tool written in C language, and can ensure consistency between multiple tables. of course, the more threads, the better (this is related to the server configuratio

For original blog reposted, contact the blogger! This project has been hosted in my Git remote Library:Https://github.com/yue9944882/Snow Project objectives Major Functionality Development Environment:CentOS7-Qt4 Implement a LINUX-based multi-thread download device with the following functions: (HTTP only) multi-thread Remote resource download (Pause/resume) resumable upload Main technologies o

= folderName;} private void button#click (object sender, EventArgs e) {try {string dirPath = textBox1.Text; if (dirPath! = "") {TextBox2.Text = ""; List PathList = new List (); String [] dirPathes = Directory. GetDirectories (dirPath, "*. *", SearchOption. TopDirectoryOnly); foreach (var dp in dirPathes) {if (! Directory. Exists (dp) {continue;} pathList. Add (dp);} ThreadPool Thread = new ThreadPool (PathList)

/** * thread Pool Management class */public class Mythreadpoolmanager {/** * Description: The following constants I am based on the asynctask source configuration, you can configure according to their own needs */ Based on the number of CPUs dynamically configure the number of core threads and the maximum number of threads private static final int cpu_count = Runtime.getruntime (). Availableprocessors (); Number of core threads = Number of CP

Summarize the use of the four common thread pools that the JDK takes with you Package thread.pool; Import Java.util.concurrent.ExecutorService; Import java.util.concurrent.Executors; Import Java.util.concurrent.ScheduledExecutorService; Import Java.util.concurrent.TimeUnit; public class Threadpoolutil {static Executorservice cachedthreadpool; Static Executorservice Fixedthreadpool; Static Scheduledexecutorservice Scheduledthreadpool;

Handler is an interface provided by Android for inter-thread communication. I didn't pay attention to it at first, because handler is used by the main thread, that is, the UI thread, and the main thread has a message loop by default.ProgramIs transparent. Therefore, I mistakenly thought that handler is useless like a