PHP implements a simple heap
Any node is less than (or greater than) all of its descendants, and the smallest element (or largest element) is at the root of the...
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Tag: The operating system
The kernel must understand (2): file system exploration
January 12, 2024
by Anay Manda
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File descriptor table (file_struct): This table records the files opened by the process. Its entry contains a pointer to an entry in the file table...
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Docker should be easy to understand
January 12, 2024
by Jayan Chandran
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In order to avoid wasting your time, this article is my personal understanding and summary of Docker. Which means it doesn't involve actual Docker. So...
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What can we see from Java’s NIO hello World source code?
January 11, 2024
by Beth Robinson
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1: gets a selector. All providers provided by SelectorProvider are the same object. . If not, it will pass the AccessController doPrivileged code to access...
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【 Optimization technology topics 】 “Underlying architecture Principles series” CPU processor little-known secrets
January 11, 2024
by Mary Roberts
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This article has participated in the "Digitalstar Project" and won a creative gift package to challenge the creative incentive money. Prerequisite Overview Confusing concepts about...
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You see all the addresses are not true | virtual addresses to physical addresses
January 11, 2024
by Brittany Hampton
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Let's start with the next question that has puzzled me for a long time: the difference between vitural and logical addresses. Most operating system books...
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Gnawing concurrency (5) : Java thread safety features and issues
January 11, 2024
by Ojas Garg
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Thread-safety issues do not occur in a single thread, whereas in multithreaded programming, it is possible to access the same shared, mutable resource simultaneously: a...
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Java multithreading race conditions, mutual exclusion, and synchronization
January 11, 2024
by Chelsea Zimmerman
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In The Essence and Design of Operating Systems, a race condition is defined as: multiple processes or threads read and write data items at the...
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Build the Wheel – create a generic version of the Dialog in Builder mode
January 11, 2024
by Emma Freeth-Stewart
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Dialogs are often used in Android development to handle popovers. Although the Android system itself encapsulates a pop-up Dialog for us, due to the difference...
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Ubuntu common software installation
January 11, 2024
by 嶽靜宜
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While MAC is easy to use, it's not the most cost-effective, and Linux, like Ubuntu, is also a good choice to try. The following is...
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Docker underlying implementation principle
January 11, 2024
by Anna Raymond
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This article will introduce several core technologies used by Docker. If we understand their usage methods and principles, we can understand the implementation principle of...
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How to correctly pick colors from UI graphics
January 11, 2024
by Barbara Gonzalez
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In mobile development, fetching colors from UI diagrams is a common part of daily development. However, there are many different ways to get colors from...
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Communication between Android and iot devices -UDP&TCP protocol
January 11, 2024
by Rita Dunn
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There are many friends in private chat, I said the update is too slow, kill blow blow. Once a week? Isn't that enough for you?...
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The service side thinking guide | common performance monitoring guide
January 11, 2024
by Miss Hilary Rogers
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When performance problems occur, you can run Linux commands to obtain performance information. This section describes some common Linux performance monitoring commands. This command can...
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Analysis of the technical principle of mobile terminal monitoring system
January 11, 2024
by Dharmajan Srinivas
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In such an era of user experience, APM technology is developing rapidly, and a hundred flowers are blooming in China. Recently, I conducted a survey...
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The technical lowdown on Linux file handles is known to only 1% of the population
January 11, 2024
by Tara Kale
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Tencent senior business operation and maintenance engineer, with 10 years of experience in R&D and operation. Advocate open source, like to study system technology. Wechat...
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Thread, process, coroutine, concurrency, parallelism, synchronization, asynchronous concept analysis
January 11, 2024
by Dean Wright
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I believe that thread, process, coroutine, concurrency, parallelism, synchronization, asynchrony these concepts we will certainly encounter in the programming process, but it happened that these...
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Android and iot device communication – Network model layering
January 11, 2024
by Jennifer Brown
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This chapter should have been put in the second section, which is more in line with the logic of knowledge from the whole down. But...
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IOS multithreading in detail: Concepts
January 11, 2024
by Rita Dunn
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Speaking of multithreading this topic, it is inevitable to understand the technical concepts related to multithreading first. The technical concepts involved in this article are...
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Analysis of zero copy technology in Linux
January 11, 2024
by 金淑芬
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This article discusses several major zero-copy technologies in Linux and the scenarios where zero-copy technologies are applicable. To quickly establish the concept of zero copy,...
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Linux From scratch 15: [page table and table] – theory + examples + graphic and most complete, most down-to-earth explanation
January 11, 2024
by Carly Wilson
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On x86 systems, physical memory is paged in 4KB units for more flexible use. The contiguous virtual memory space is then mapped to discrete physical...
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Computer operating system collation
January 11, 2024
by Kismat Kant
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What is the operating system: the operating system is the computer management software and hardware resources program, is the core and cornerstone of the computer...
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IOS to recognize a slag for summary essay | the nuggets technology
January 11, 2024
by Samarth Sant
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Located in the corner of north China, many companies did not come to the site for spring recruitment this year, so most of them were...
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Epoll summary for Linux IO reuse
January 10, 2024
by 洪冠霖
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Epoll is not mentioned in UNIX Network Programming. For some reason, the following is summarized in the Linux Manual. Epoll is a mechanism provided on...
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Communication between processes
January 10, 2024
by Darren Hodgson
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The concept of interprocess communication: each process has a different user address space, and the global variables of any process can not be seen in...
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Remember a database deletion to data recovery
January 10, 2024
by Patricia Meyer
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Familiar friends may know that after joining the architecture group, I have been doing various development AIDS for the team this year, including a server....
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Process scheduling, the confessions of a scheduler
January 10, 2024
by Mr. Maurice Page
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I'm a process scheduler. My responsibility is to schedule all the processes in the computer and allocate CPU resources to them. At the beginning, when...
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HongMeng kernel source code analysis (memory mapping), virtual memory where virtual | | best blog analysis OpenHarmony source | v15.03
January 10, 2024
by Louise Evans
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The Master said, "If virtue is not solitary, there must be neighbours." "The Analects of Confucius" : Li Ren's blog series of 100 articles. This...
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HongMeng kernel source code analysis (scheduling queue) | | how many scheduling are the kernel queue best blog analysis OpenHarmony source | v6.05
January 10, 2024
by Nitya Wagle
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The Master said, "The superior man does not seek satiety in food, does not seek safety in habitation, is quick in matters and cautious in...
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HongMeng kernel source code analysis (compile script) of psoriasis | | how to prevent the compilation environment best blog analysis OpenHarmony source | v58.02
January 10, 2024
by Sumer Kuruvilla
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Yan Yuan asked Ren. The Master said, "To renounce oneself and return courtesy is benevolence. One day abnegation of propriety, the world will return to...
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