Research areas: Windows & Linux platforms, C/C++ backend development, embedded systems and Linux kernel, etc.
This article explains the fundamentals of CPU context switching, covering the hardware and kernel mechanisms, step‑by‑step saving and restoring of registers, scheduling algorithms, different types of switches, performance costs, optimization techniques, and includes a complete C++ simulation example.
This article explains the internal workflows of Linux's reboot, poweroff, and halt commands, covering their kernel interactions, parameters, safety considerations, and provides C++ simulations to illustrate each step for system administrators and developers.
The article explains how Linux soft interrupts work, why they can become a CPU bottleneck under heavy network traffic, and provides detailed analysis, code examples, monitoring tools, and optimization strategies to diagnose and mitigate the issue.
CPU caches bridge the speed gap between processors and memory, but cache misses can dramatically degrade performance, especially under high concurrency or big‑data workloads; this article explains cache architecture, common miss causes, diagnostic tools like perf and cachestat, and practical optimization techniques for Linux systems.
This article explains the role of copy constructors in C++, when the compiler automatically provides a default one, the situations that trigger copy construction, why bitwise copying can be unsafe, and how to implement proper deep‑copy semantics with clear code examples.
This article explains why C++ thread pools often hit bottlenecks in high‑concurrency scenarios and provides practical techniques—such as lock‑granularity tuning, lock‑free queues, object‑pool reuse, and pre‑allocation—to improve task scheduling and memory management without relying on external frameworks.
This article explains the inner workings of Linux's epoll mechanism, detailing how red‑black trees manage registered file descriptors and how a ready‑list delivers events in O(1) time, covering core APIs, data structures, insertion‑deletion logic, and the full kernel‑space to user‑space flow.
Discover how the Linux kernel’s skb buffer can silently drop packets despite full NIC utilization, learn the three primary causes—driver ring buffer overflow, kernel queue saturation, and CPU interrupt imbalance—and follow step‑by‑step diagnostics with ethtool, softnet_stat, and sysctl to tune parameters and eliminate this hidden performance killer.
This article explains what callback functions are, how they enable asynchronous programming across languages, demonstrates their implementation with JavaScript, C/C++, Python and HTML examples, and discusses practical use‑cases, advantages, pitfalls like callback hell, and modern alternatives such as Promises and async/await.
This comprehensive guide walks Linux kernel developers through KGDB fundamentals, installation, configuration, and practical debugging techniques—including serial and network setups, kernel patching, boot‑parameter tuning, and common pitfalls—enabling precise source‑level debugging of multi‑core kernel issues.
