Research areas: Windows & Linux platforms, C/C++ backend development, embedded systems and Linux kernel, etc.
The article explains how the Linux Deadline real‑time scheduler works, detailing its three core parameters (runtime, period, deadline), the EDF algorithm, kernel data structures, CBS bandwidth control, task state transitions, common configuration pitfalls, and practical tuning and monitoring commands.
The article explains why ordinary heap allocation can cause fragmentation and slowdown, introduces the C++ allocator interface and its allocate/deallocate functions, shows how to implement a custom stack‑based allocator, compares traditional allocators with C++17 polymorphic memory resources (PMR), and provides practical code examples, performance benchmarks, and best‑practice guidelines.
Global variables are convenient in embedded projects but can cause memory waste, tight module coupling, hard‑to‑track bugs, and portability issues, especially in RTOS multitasking; this article explains the underlying memory layout, common traps, and practical techniques to use globals safely.
This article explains Linux process virtual address spaces, details the multi‑step internals of the C++ new operator, and analyzes its memory‑fragmentation, time, and space overheads through code examples and benchmarks, then offers practical mitigation techniques such as memory pools and smart pointers.
This article explains Linux signal fundamentals—including generation, registration, dispatch, masking, and handling—covers standard and real‑time signals, common pitfalls like non‑reentrancy and EINTR, and provides concrete C/C++ code examples for each scenario.
The article explains why process memory overflows are a critical issue in server operations and provides a step‑by‑step guide on using Linux cgroups to set precise memory limits, monitor usage, and avoid OOM crashes, illustrated with real‑world examples and troubleshooting tips.
This article provides a comprehensive analysis of the Linux I2C framework, detailing its physical bus characteristics, protocol specifics, comparison with SMBus, and the multi‑layer kernel architecture—including hardware, adapter, core, and driver layers—culminating in a step‑by‑step MPU6050 driver implementation and testing guide.
This guide lists ten pivotal Linux open‑source projects—from the kernel and musl libc to Docker and systemd—explaining what you can learn from each, offering concrete replication targets, and providing a structured learning path for mastering low‑level system development.
The article explains that stack memory allocation is quicker than heap allocation because the stack uses a simple pointer move and LIFO order, while the heap must search for free blocks, manage fragmentation, and often requires explicit deallocation, leading to higher overhead and potential leaks.
This article systematically explains C++ reference‑count changes, the precise moments when ++/-- operators trigger in shared_ptr, move, copy, reset and destroy operations, and illustrates common mistakes with concrete code examples, helping developers and interviewees avoid subtle bugs and logic errors.
