Research areas: Windows & Linux platforms, C/C++ backend development, embedded systems and Linux kernel, etc.
This article explains how a C/C++ program is compiled into an ELF executable, details the ELF file structure, describes the kernel's validation and segment mapping, covers dynamic linking, and shows how the process starts execution from the _start entry point, providing practical commands and debugging tips.
This article explains the core principles of NUMA, its deep integration with the Linux kernel, practical memory‑node and scheduling mechanisms, real‑world database and virtualization use cases, and step‑by‑step commands for inspecting and tuning NUMA on modern servers.
This comprehensive guide walks readers through the Linux PCI driver architecture, explains the PCI and PCIe bus evolution, details the kernel's layered driver framework, enumerates devices, manages resources, registers drivers, and presents a full SSD driver case study with code examples and performance tuning techniques.
This article provides a comprehensive guide to the const and static modifiers in C/C++, covering their distinct purposes, usage with variables, pointers, functions, and class members, and answering common interview questions with clear explanations and practical code examples.
This article explains how Linux virtual memory lets each process appear to have a large, independent address space by using paging, page tables, swap, and the MMU, covering concepts from basic virtual memory principles to page replacement algorithms and practical tools.
This article explains the Linux /proc virtual filesystem, detailing its structure, dynamic file generation, key system and process files, and how to use it for real‑time monitoring, performance tuning, kernel parameter tweaking, and troubleshooting, complete with practical command examples and a sample monitoring script.
This step‑by‑step tutorial shows how to configure gRPC, define protobuf service contracts, and implement streaming upload and download in C++, covering environment setup, code generation, server and client logic, testing, and performance tuning for efficient file transfer.
This article explains the challenges of allocating large contiguous physical memory in Linux, introduces the Contiguous Memory Allocator (CMA) as a solution, and provides in‑depth coverage of its design, reservation, migration, data structures, initialization, configuration, usage in drivers, and debugging techniques.
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.
