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- The importance of timer components in the game business and how to implement them
- Timer is a relatively common component. As far as the server is concerned, the framework level needs to use timers to time out sessions, and the application level needs to use timers to handle some time-related business logic. For businesses such as games that require a large number of timers, a simple and efficient timer component is essential. The implementation of the timer component can be divided into two parts: the first part is relatively simple and has various implementation methods, but it is basically related to the language, so it is not the focus of this article. The so-called concrete concept seems to refer to how users use it. [Article Benefits] The editor has uploaded some learning books and video materials that I think are better in the group file. If necessary, you can join the group [977878001] to receive them! ! ! Comes with an extra
- LINUX 789 2024-07-18 11:17:12
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- A closer look at Linux kernel timers: interrupt-based asynchronous mechanisms and non-process context principles
- 1. Kernel timer 1. Basic concept In certain scenarios, we need to perform certain actions after a specific time, and we do not want to waste CPU by waiting. This timer is a very suitable mechanism. A timer is used to execute a function at a certain point in the future to complete a specific task. Kernel timers tell the kernel to call a specific function with specific parameters at a specified point in time. The timer runs asynchronously on its registrant. When the timer is running, the task that registered the timer may be sleeping or running on other processors, or may even have exited long ago. The kernel timer in Linux is a Linux application timer implemented based on (soft) interrupts, that is, it is in the interrupt context rather than the process context. There are some primitives in non-process contexts
- LINUX 664 2024-07-18 11:13:55
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- Online course selection management system based on SSM framework: a powerful tool to improve the efficiency of educational administration management in colleges and universities
- Other projects: Design and implementation of seismic data processing software based on Linux, click on the author's homepage Catalog 1 System Introduction With the development of the information age, design and implementation of seismic data processing software based on Linux, the Internet has made people's lives more and more convenient. In recent years, in the face of the new enrollment expansion policies of major colleges and universities, the number of middle school students in various colleges and universities has suddenly increased, and the corresponding school academic staff will also face a shortage. This has reduced the difficulty for academic staff in managing the course selection information of middle school students. , the traditional course selection in previous years was gradually eliminated because it was a waste of manpower and material resources. At this time, the emergence of the online course selection management system will promote the increasingly standardized course selection management behavior of middle schools, thereby greatly reducing the casualness of middle school course selection management in previous years and greatly improving the efficiency of course selection management.
- LINUX 529 2024-07-18 10:10:44
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- What should I do if Linux scheduled tasks are not executed? This article teaches you how to troubleshoot
- The implementation of Linux scheduled tasks includes: cron, anacron, at, etc., but what you come into contact with in your daily work is the cron service. cron is the service name, crond is the background process, and crontab is the customized scheduled task list. Scheduled tasks are often used in projects to implement individual functions. Recently, I encountered a situation where scheduled tasks were not executed. Because I didn’t know much about this before, it was time-consuming and laborious, and I finally found the problem. For this reason, I would like to share with you some troubleshooting techniques to avoid detours in the future. 1. Check whether the crond service is executed. You can view the process pid of crond through the command pgrepcrond or /sbin/servicecrondstatus, and you can determine the cron
- LINUX 728 2024-07-18 10:09:34
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- The role of common Linux commands in development and debugging and introduction to sample programs
- Some of the commonly used Linux commands can be very helpful during the development or debugging process. Some can help us understand or optimize our programs, and some can help us locate difficult problems.
- LINUX 868 2024-07-18 09:51:59
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- Mariadb learning summary (3): data types
- Data type Data type -> is an abstraction of a data classification with the same attributes and properties. For example: a string is a string composed of characters, which is called a string... In computers, substrings can be divided and new characters can be added at the end of the string. However, such operations can only operate on string data. It cannot operate on integers. Numeric type, the Arabic numerals we are most exposed to, can perform arithmetic operations, logical operations and other operations. The data types in MySQL MySQL supports multiple types, which can be roughly divided into three categories: numerical, date/time and string (character) types. . Numeric type 1. For integer types, you can limit their length. The format is as follows: Integer type [(M)][SIGNED|UNSIGNED|
- LINUX 1148 2024-07-18 08:15:01
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- Linux learning tips
- However, in recent years, Linux has become more and more reused. It is no longer just a show off among some open source enthusiasts, but its value has been reflected in many aspects. Especially in server operating systems, it has become the first choice of senior operation and maintenance engineers. operating tools. With the rapid development of the computer industry, I believe that the Linux operating system will not only stay in platform applications, it will show its unique advantages and charm in a wider space. Nowadays, for most Chinese computer users, few use the Linux operating system themselves, and a considerable number of them have even heard of Linux for the first time. But this is not surprising, even in the eyes of many college students. In your eyes, there is only Windows, only Microsoft,
- LINUX 634 2024-07-18 07:02:11
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- Detailed explanation of Elasticsearch's basic friend Logstash
- Logstash is a powerful data processing tool that can realize data transmission, format processing, formatted output, and has powerful plug-in functions, which are often used for log processing. 1. Principle Input can extract data from files, storage, and databases. Input has two options. One is to hand it over to Filter for filtering and pruning. The other is to hand it directly to OutputFilter to dynamically convert and parse the data. Data information can be filtered and trimmed in a customized way. Output provides many output options. You can send data to the place you want to specify, and can flexibly unlock many downstream use cases. 2. Installation and use 1. Install wgethttps://artifacts
- LINUX 991 2024-07-18 06:56:47
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- The master teaches you how to display the number of lines in vim editor
- Often when using vi to edit a file under Linux, basically no line number is displayed. Sometimes the file must be transferred to the local computer and modified with a powerful editor. Here I will share a small command. When you edit a certain configuration When entering a file, enter the following command to display the number of lines. Applicable to any linux open source system. Setnusetnumber takes permanent effect; #vi~/.vimrc//Or directly enter and add the following command setnu to save and exit after adding! In this way, you don’t have to enter the command to check the line number every time. The above two methods can set the line number for vi. If you want to cancel, enter: setnonu and delete setnu in the vi~/.vimrc file.
- LINUX 469 2024-07-17 18:26:23
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- How to install teamviewer, todesk, and sunflower under arch linux and solve problems
- Teamviewer, Todesk, and Cosmos should be the three most used software control software! Tomorrow we will talk about how to install linux and teamviewer under archlinux. These three software environment requirements must ensure that you have configured the "domestic source" and "community source" of arch and installed yay to install teamviewer#Installation command yay-Steamviewer# Start service sudoteamviewerdaemonstartsudoteamviewerdaemonenablesudoteamviewerdaemonrestart install todesk#install tod
- LINUX 912 2024-07-17 15:14:07
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- Master explains how to install oracle and mysql with Docker under unbuntu
- 1. Install docker to update the apt source and install the CA certificate. The command is as follows: sudoapt-getupdatesudoapt-getinstallapt-transport-httpsca-certificates. Add GPG key: sudoapt-keyadv--keyserverhkp://p80.pool.sks-keyservers.net: 80--recv-keys58118E89F3A912897C070ADBF76221572C52609D Open /etc/apt/sources.list.d/docker
- LINUX 761 2024-07-17 12:03:18
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- Mariadb learning summary (2): database and table management
- Database management Buddha said: "First there are libraries, then tables, then data..." Create database CREATEDATABASE[IFNOTEXISTS]db_name[create_specification]...create_specification:[DEFAULT]CHARACTERSET[=]charset_name|[DEFAULT] COLLATE[=]collation_name For example: Create a database and specify the default character set as UTF-8SHOWCHARACTERSET; //View supported character sets CREATEDATABASEmydb
- LINUX 452 2024-07-17 08:58:29
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- Learning summary (1): ssh usage, Linux directory structure and password-free login
- Learning summary (1).: represents the current directory, and can also be represented by ./; ..: represents the upper-level directory, and can also be represented by ../. Article Directory Step 0: After using ssh to open the ssh tool putty (free!), I found an error Couldn'ttagreakekeyexchangealgorithm when logging in. I checked and said that the putty version may be too old, so I went to the official website to download another one——, magically Okay (but at first I thought the account was the command related to the account linux file in Ubuntu, but I never logged into hhh. Then I tried it and realized it was the @ front thing of this thing hahahaha). In addition, you can also set up a password-free password
- LINUX 597 2024-07-17 07:51:51
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- Nginx Getting Started Tutorial
- 1. Introduction to Nginx 1.1 Nginx features modular design, good scalability and high reliability. Support hot deployment: update configuration files without downtime, upgrade versions, and replace log files. Low memory consumption: 10,000 inactive in keep-alive connection mode. Connection, only requires 2.5M memory event-driven, aio, mmap, sendfile1.2 Basic functions of Nginx static resources web server http protocol reverse proxy server pop3/imap4 protocol reverse proxy server FastCGI (lnmp), uWSGI (python), etc. Protocol modularization (non-DSO) like zip, SSL module 1.3 Nginx with
- LINUX 1177 2024-07-17 07:21:20
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- How to turn on the Linux subsystem on Windows 10
- WSL allows you to access the Linux Bashshell on Windows. In the previous article, we discussed the target users of Windows Subsystem Linux (WSL). In this article, we will start the journey of WSL on Windows 10 devices. To prepare for WSL you must use the latest version of Windows 10 Fall Creator Update. After that, check the Windows 10 version by searching for “About” in the Start menu bar. In order to use WSL, your version should be 1709 or latest. Here is a screenshot of my operating system
- LINUX 897 2024-07-17 04:07:27
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