0 Introduction The Linux operating system has good security and stability. As an open-source UNIX-like operating system, its security and reliability have attracted the attention of governments worldwide, especially in our country where it has played a positive role in the security and controllability of operating systems[1]. In recent years, the market share of the … Read more
The embedded audio system is widely used in embedded fields such as GPS navigation, PDAs, and 3G mobile phones. However, there is currently little research in this area in China. The audio system design includes both software and hardware design, with a hardware architecture based on the IIS bus. IIS (Inter-IC Sound bus), also known … Read more
1. Background Introduction As a DBA, it is inevitable to encounter performance issues. How should we troubleshoot when we face performance problems? For instance, under high concurrency, if we experience slow business response and long processing times, how do we start the investigation? This article will analyze how to diagnose and locate issues when IO … Read more
Click the blue WeChat name below the title to quickly follow A few days ago, I saw in a technical document that it said “Linux‘saarch version”, at first I thought it was a mistake, it should be “arch”, did they add an extra “a”? But later I realized I was ignorant, “aarch” is correct. AARCH … Read more
eBPF stands for extended Berkeley Packet Filter, which means extended Berkeley Packet Filter in Chinese. Generally, to add new features to the kernel, one needs to modify the kernel source code or write kernel modules. However, eBPF allows programs to run without modifying the kernel source code or adding additional kernel modules. eBPF enhances the … Read more
Click the blue text above to follow us In embedded systems, although Linux itself is not a real-time operating system, its real-time performance can be significantly improved by implementing PREEMPT-RT patches, rational scheduling, optimizing interrupt handling, limiting kernel interference, and leveraging hardware acceleration. 1 Using Real-Time Linux (PREEMPT-RT) PREEMPT-RT is a set of patches that … Read more
Click the “Embedded Application Research Institute” above, and select “Pin/Star the Public Account“ Valuable Resources Delivered Instantly! Source | CSDN Author | Job Seeker First Supplement | Embedded Application Research Institute Recently, I have been working on some projects related to Linux and QT, which involve the interaction between USB hotplugging and the QT interface. … Read more
uClibc-ng is a lightweight C library designed for embedded Linux systems. It is significantly smaller than the GNU C Library (glibc) but is nearly fully compatible with most applications supported by glibc. For resource-constrained embedded devices, uClibc-ng is an ideal choice as it can significantly reduce the size of the system image, thereby improving performance … Read more
▲Click the card above to follow for more▲Many newcomers and engineers learning embedded systems often feel confused midway through their studies, unsure of where to start or advance, and unclear about their current level of learning and how to improve themselves moving forward.To address these common situations faced by engineers, today the editor will share … Read more
01. Debugging Related Macros When compiling programs in Linux using gcc, there are some special syntaxes for debugging statements. During the compilation process, gcc generates some macros that can be used to print information about the current source file, mainly including the current file, the currently running function, and the current line of the program. … Read more