In-Depth Analysis of Linux Soft Interrupts: From Principles to Practice 1 Overview of Linux Soft Interrupts 1.1 What are Soft Interrupts and Their Design Motivation In the Linux kernel, soft interrupts (Softirq) are a very importantdelayed processing mechanism, which is entirely triggered by software. Although referred to as “interrupts”, they are actually a mechanism fordelayed … Read more
In embedded system development, the Linux kernel is the core of the entire system. Understanding the kernel boot mechanism not only helps developers build a complete system understanding but also plays an important role in troubleshooting boot anomalies, performance optimization, and kernel trimming. This article will systematically analyze the embedded Linux kernel boot process from … Read more
This article is suitable for: engineers who want to build a complete cognitive framework for embedded systems, developers preparing to delve from the application layer to the underlying layers, and those who wish to systematically understand the entire path from “bare-metal → kernel”. In one sentence: After reading this article, you will advance from “fragmented … Read more
Multipath TCP (MPTCP) is one of the most valuable networking capabilities in the Linux kernel in recent years, especially suitable for scenarios such as in-vehicle gateways (T-BOX), parallel driving, and multi-link redundancy. It can simultaneously utilize multiple links such as 4G/5G, Wi-Fi, and Ethernet, significantly enhancing data throughput, link recovery, and disaster recovery capabilities in … Read more
Application of the Visitor Pattern in C Language (Including Linux Kernel Examples) 1. Definition and Core Value of the Visitor Pattern The Visitor Pattern is a behavioral design pattern that focuses on separating data structures from data operations, defining a visitor interface to encapsulate operations on elements within the data structure, allowing operations to be … Read more
At the Seoul Open Source Summit hosted by the Linux Foundation, Linus Torvalds, the creator of the Linux kernel and inventor of the Git version control system, engaged in his 28th conversation with Dirk Hohndel, head of open source at Verizon, sparking heated discussions in the tech community. This conversation unveiled his little-known recent situation. … Read more
Application of Strategy Pattern in C Language (Including Linux Kernel Examples) 1. Definition and Core Value of Strategy Pattern The Strategy Pattern is a behavioral design pattern that focuses on defining a family of algorithms (or behaviors), encapsulating each algorithm as an independent strategy object, allowing algorithms to be dynamically replaced without affecting the client … Read more
Application of Template Method Pattern in C Language (Including Linux Kernel Examples) 1. Definition and Core Value of Template Method Pattern The Template Method Pattern is a behavioral design pattern that defines the skeleton of an algorithm (the template method) and defers some steps to subclasses (or concrete implementations). The template method fixes the overall … Read more
Resource Limits The Linux kernel has protective mechanisms to prevent processes from consuming excessive memory. Since BPF maps can consume a significant amount of memory, they are also subject to these mechanisms. rlimit (Resource Limit) <span>rlimit</span> (resource limit) is a system mechanism used to track and limit the amount of specific resources that a process … Read more
In-Depth Analysis of the Linux Slab Allocator: From Principles to Practice 1 Overview of the Linux Slab Allocator 1.1 What is the Slab Allocator The slab allocator is an efficient small memory allocation mechanism in the Linux operating system kernel, specifically designed for managing the allocation and release of kernel objects. This mechanism was originally … Read more