Arthas realizes a CPU troubleshooting and code hot update

Author he Bo [the official community of Arthas is holding an essay solicitation activity. You will get a prize if you participate~ Click Submit] 1. Preface background Online code often takes up too much CPU. According to past experience, I will use the top instruction and further use jstack to check the specific information for problem troubles ...

Posted by tech0925 on Thu, 19 May 2022 22:04:54 +0300

threading module other classes

Lock When reading and writing data globally, if atomic operations cannot be guaranteed, it is easy to pollute the data. Such as: import threading import time from threading import Lock l = [0] def func(): num = l[0] time.sleep(0.001) l[0] = num + 1 threads = [] if __name__ == '__main__': for i in range(100): ...

Posted by Wynder on Thu, 19 May 2022 05:28:58 +0300

Four ways to create threads in java

Let's first look at processes and threads Process is the smallest unit of computer scheduling resources Thread is the smallest unit of process scheduling resources. A process has at least one thread Four ways to create threads in java 1. Inherit the Thread class and override the run() method. The run method is the task to be executed Ad ...

Posted by RwpTechAdMin on Wed, 11 May 2022 05:17:27 +0300

Linux multithreaded programming

This chapter will be divided into two parts to explain. The first half will introduce the use scenarios and basic concepts of threads, and illustrate the basic process from thread creation to exit to recycling through example code. The latter part will explain through the example code that if the thread is well controlled, the concepts and usag ...

Posted by brash on Wed, 11 May 2022 02:57:23 +0300

Study Notes [Multithreading - Section 4: Simple Foundations and Security Issues of synchronized]

thread synchronization Thread asynchronous model Each thread executes its own and has nothing to do with each other. For example, there are two threads, one is for the younger brother to eat, and the other is for the elder sister to watch TV. Neither one affects the other. thread synchronization model In my understanding, there is some kind o ...

Posted by xzazx on Tue, 03 May 2022 07:27:00 +0300

Talk about multithreaded producer consumer model

Producer consumer model In the thread world, the producer is the thread of production data, and the consumer is the thread of consumption data. In multi-threaded development, if the processing speed of the producer is very fast and the processing speed of the consumer is very slow, the producer must wait for the consumer to finish processing b ...

Posted by Mightywayne on Sun, 01 May 2022 14:28:50 +0300

Summary of thread knowledge points

Next, let's talk about what thread is and where it is used in our daily life. First, let's look at the following questions to understand the relevant knowledge of threads: 1. What is the essence of mobile app we usually use? 2. Why does the more software you open, the slower the system feels? 3. Why can we chat with others on wechat when we ...

Posted by mistercoffee on Sat, 09 Apr 2022 18:24:21 +0300

C + + thread programming - various thread pools

Thread pool Thread safe queue for storing tasks // Comparison 4.5 complete class definition of thread safe queue using conditional variables // Include shared_ptr instance #include <condition_variable> #include <mutex> #include <queue> #include <utility> #include <memory> template <typename T> class threads ...

Posted by TPerez on Sat, 09 Apr 2022 13:05:48 +0300

Use of completable future

1. runAsync and supplyAsync methods Completable future provides four static methods to create an asynchronous operation. public static CompletableFuture<Void> runAsync(Runnable runnable) public static CompletableFuture<Void> runAsync(Runnable runnable, Executor executor) public static <U> CompletableFuture<U> supplyAs ...

Posted by Xeoncross on Mon, 04 Apr 2022 20:42:06 +0300

Lesson 1 thread knowledge

process Speaking of the process, I have to say the procedure. Program is an ordered collection of instructions and data. It has no running meaning. It is a static concept. The process is an execution process of the execution program, which is a dynamic concept. It is the unit of system resource allocation Usually, a process can contain severa ...

Posted by loki1664 on Sun, 03 Apr 2022 15:32:26 +0300