Research areas: Windows & Linux platforms, C/C++ backend development, embedded systems and Linux kernel, etc.
This article explains the role of the Memory Management Unit (MMU) and paging in modern operating systems, covering hardware structure, address translation, permission checks, page tables, TLB behavior, virtual memory mechanisms, and practical Linux kernel code examples for memory protection, sharing, and performance optimization.
This article dissects the Linux kernel's UDP receive path, identifies key bottlenecks such as small socket buffers, system‑call overhead, interrupt storms, and application‑level processing limits, and then presents concrete kernel parameter tweaks, memory‑pool designs, multithreaded I/O, and SO_REUSEPORT techniques with full C code examples to dramatically boost throughput and reduce packet loss.
This article provides a comprehensive, step‑by‑step explanation of Linux process management, covering the definition of a process, PCB structure, task organization, state transitions, creation system calls (fork, vfork, clone), execution with exec, scheduling, waiting, termination, and the kernel’s resource allocation strategies.
This article explains the fundamentals of Remote Direct Memory Access (RDMA), its low‑latency, zero‑copy and kernel‑bypass mechanisms, programming interfaces, and real‑world applications in data‑center networks, high‑performance computing, and distributed storage, providing developers with practical guidance and code examples.
This comprehensive guide explains the inner workings of the C malloc function, covering memory layout, stack vs heap, glibc memory pools, system calls like brk/sbrk and mmap, allocation strategies, fragmentation, alignment, multithreading safety, and comparisons with calloc, realloc, and C++ new.
This comprehensive guide demystifies the Linux kernel by explaining its core architecture, key subsystems such as process scheduling, memory management, file systems, networking, and device drivers, and provides practical advice on reading source code, using development tools, and mastering kernel module development.
This article explains Linux’s comprehensive memory management system, covering physical and virtual memory concepts, paging, page tables, the MMU, the buddy allocator, slab allocator, memory reclamation strategies such as LRU and swap, monitoring tools, and practical optimization techniques for both user‑space and kernel‑space allocations.
This comprehensive tutorial walks you through installing VSCode and GDB on Linux, macOS, and Windows, configuring launch.json and tasks.json, mastering basic and advanced debugging techniques such as breakpoints, watchpoints, multithreaded and remote debugging, and troubleshooting common issues for C/C++ development.
This article explains the fundamentals of Linux memory management, details how shared memory implements zero‑copy inter‑process communication, and provides step‑by‑step code examples of system calls, mmap, sendfile, splice, and synchronization techniques for high‑performance data transfer.
This comprehensive guide explains the DNS system, covering its core concepts, hierarchical domain structure, server types, configuration files, detailed resolution workflow, common record types, performance‑boosting optimizations, and step‑by‑step troubleshooting methods for typical DNS failures.
