Optimization of File Descriptors and Connection Counts in Linux In Linux system administration, file descriptors (File Descriptor) and connection counts are key parameters for performance optimization. A file descriptor is a handle that a process uses to access resources, while the connection count directly affects the capability of high-concurrency applications. According to a report by … Read more
1. Basic Information Company: ZhongzhiField: Backend Development with 0-5 Years ExperiencePosition: C++ Development EngineerInterview Date: 2021-10-15Interview Format: PhoneInterview Duration: 90 minutesIs there a recording?: YesRecording Notes: Review is not anonymized, please maintain confidentiality Recording and Transcription File: https://articles.zsxq.com/id_5frz7dzp4n1j.html Interview Background: Conducted at Guomei in Beijing 2. Interview Review 2.1 Interview Questions 1Please introduce yourself. (Implicit … Read more
In the operation and performance optimization of Linux systems, mastering the appropriate performance analysis tools is crucial. This article systematically introduces the practical usage of various performance analysis tools and demonstrates how to locate and resolve performance issues through real-world cases. 1. Overall System Monitoring: Establishing Performance Baselines 1. vmstat – The Swiss Army Knife … Read more
“Say goodbye to the hassle of the server room, and access your Linux desktop remotely, TigerVNC is truly amazing”—— this is undoubtedly the voice of countless operations and maintenance personnel, developers, and tech enthusiasts. TigerVNC has become a powerful tool for remote access to Linux desktops due to its lightweight, efficient, and stable characteristics. In … Read more
1. Basic Information Company: ZhongzhiField: Backend Development with 0-5 Years ExperiencePosition: C++ Development EngineerInterview Date: 2021-10-15Interview Format: PhoneInterview Duration: 90 minutesIs Recording Available: YesRecording Notes: Review is not anonymized, please maintain confidentiality Recording and Transcription File: https://articles.zsxq.com/id_5frz7dzp4n1j.html Interview Background: Conducted at Guomei in Beijing 2. Interview Review 2.1 Interview Questions 1Please introduce yourself. (Implicit in … Read more
The Ultimate Pursuit of Network Performance: In the era of cloud-native and 5G, network performance directly determines the user experience and commercial value of applications. This article delves into the Linux 5.15.4 kernel network subsystem, revealing the secrets of performance optimization from hardware interrupts to application layer reception, aiding in the construction of high-performance network … Read more
Linear matrix inequalities are a core tool in control systems, optimization, and many engineering fields. 1. What is a Linear Matrix Inequality? Linear matrix inequality refers to inequalities of the following form: Where: is the decision variable (a vector) we need to solve for. is a given symmetric matrix. indicates that the matrix is negative … Read more
This article is generated by Tencent Yuanbao, with content outline and verification provided by @Xiao Hui~ gcc [-c|-S|-E] [-std=standard] [-g] [-pg] [-Olevel] [-Wwarn…] [-Wpedantic] [-Idir…] [-Ldir…] [-Dmacro[=defn]…] [-Umacro] [-foption…] [-mmachine-option…] [-o outfile] [@file] infile… 1 Directory Options 1.1 Specifying Header File Search Path (-I) When header files are not in standard directories (such as <span>/usr/include</span>), … Read more
Note: Recently, I have been responsible for migrating inference services to Huawei’s Ascend 910C chip, which uses Kunpeng ARM CPUs. One of the major issues during the migration was the transition of SIMD-related instruction modules from the x86 platform. Here, I will summarize the relevant technical points. In modern processor architectures, SIMD (Single Instruction, Multiple … Read more
1. Four Major New Technology Trends in Linux for 2026 1. Kernel Upgrades: Breakthroughs in Hardware Compatibility and Energy Efficiency The Linux kernel achieved dual upgrades in hardware support and performance optimization in 2025. For new domestic processor chips, the kernel developed dedicated optimized drivers that can fully unleash hardware performance — after optimization, a … Read more