Fei has over 10 years of development experience at Tencent and Sogou. Through this account, he shares his deep insights on performance.
This article traces the historical origins of coroutines from early COBOL compiler challenges, explains their cooperative execution model, compares them with thread scheduling, and reviews how modern languages like Python, C++ and Go implement coroutine support to improve IO‑bound performance.
This article explains the internal mechanics of Unix Domain Sockets, shows how they differ from traditional 127.0.0.1 TCP loopback, provides sample code for server and client, and presents benchmark results demonstrating significantly lower latency and higher throughput for local IPC.
The article argues that both hands‑on practice and deep understanding of network implementations are essential for computer‑science students and engineers, illustrating the gap with theory‑only learning, presenting the pyramid learning model, recommending Linux tools, coding exercises, and detailed studies of TCP, epoll, and I/O performance.
This article explains how iptables, built on the Netfilter framework, processes network packets through five kernel hooks and four tables, covering the receive, send, and forward paths, and demonstrates practical NAT, DNAT, filter, raw, and mangle rules for Docker and Kubernetes environments.
This article explains Docker's network virtualization principles, covering veth devices, bridge networks, Linux namespaces, and NAT techniques for container communication.
This article explains the physical structure of mechanical disks, partitioning strategies, inode and block allocation, and how filename length and directory layout affect Linux file system performance, providing practical experiments and tips for improving disk I/O.
This article explains how Linux network namespaces provide isolated network stacks by using virtual Ethernet devices, kernel data structures, and per‑namespace routing and iptables, offering step‑by‑step commands, code excerpts, and deep insight into the kernel mechanisms that enable container networking isolation.
This article explains how Linux bridge and virtual Ethernet (veth) devices work together to enable communication between Docker containers, covering the creation of network namespaces, veth pairs, bridge setup, kernel implementation details, and packet forwarding processes.
This article demonstrates how to accurately measure and restrict the CPU consumption of a CPU‑intensive third‑party SDK by creating and configuring cgroup and cpuset groups, binding the process to a single core, and verifying the limits with stress testing tools.
This article provides a comprehensive technical analysis of Linux virtual Ethernet (veth) pairs, detailing their practical configuration, underlying kernel creation mechanisms, and complete network communication workflow within containerized environments like Docker.
