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Deepin Linux

Research areas: Windows & Linux platforms, C/C++ backend development, embedded systems and Linux kernel, etc.

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Latest from Deepin Linux

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Deepin Linux

May 12, 2026 · Backend Development

From Zero to One: Mastering Linux NAPI High‑Concurrency Packet Reception

This article explains why traditional interrupt‑driven network I/O stalls under high traffic, introduces the NAPI (New API) mechanism that combines interrupt wake‑up with batch polling, details its core data structures and scheduling functions, and provides step‑by‑step configuration and tuning guidance to achieve efficient, low‑latency packet processing on Linux servers.

LinuxNAPIPerformance tuning

0 likes · 35 min read

From Zero to One: Mastering Linux NAPI High‑Concurrency Packet Reception

Deepin Linux

May 11, 2026 · Fundamentals

Eliminate Memory Fragmentation: Understanding Memory Pools

The article explains how frequent dynamic allocations cause external and internal memory fragmentation, illustrates the problem with C++ examples, and shows that pre‑allocating a large contiguous block as a memory pool—managed via block division, free‑list tracking, and thread‑safe operations—significantly reduces fragmentation, improves allocation speed, and boosts concurrency performance.

CMemory FragmentationPerformance Optimization

0 likes · 30 min read

Eliminate Memory Fragmentation: Understanding Memory Pools

Deepin Linux

May 10, 2026 · Fundamentals

Do You Really Understand pthread Internals? Master Linux Multithreading Basics

This article dives deep into Linux pthread fundamentals, covering process‑vs‑thread concepts, the POSIX API, kernel implementation via the clone syscall, thread lifecycle, synchronization primitives, common pitfalls such as deadlocks, stack overflows and thread leaks, and provides practical debugging and mitigation techniques with real code examples.

Linuxclone syscalldeadlock

0 likes · 55 min read

Do You Really Understand pthread Internals? Master Linux Multithreading Basics

Deepin Linux

May 7, 2026 · Operations

Don’t Claim You Can Troubleshoot Networks Until You Understand Packet Loss

This article explains what network packet loss is, its common causes—from hardware faults to congestion and misconfiguration—and provides a step‑by‑step, production‑ready methodology for diagnosing and resolving loss using tools such as ping, traceroute, Wireshark and tcpdump.

LinuxTCP/IPTroubleshooting

0 likes · 31 min read

Don’t Claim You Can Troubleshoot Networks Until You Understand Packet Loss

Deepin Linux

May 6, 2026 · Fundamentals

Master Linux Memory Performance: From Theory to Real‑World Optimization

This article systematically breaks down Linux's core memory mechanisms, identifies common performance bottlenecks, and demonstrates how to use tools like numastat, perf, and Valgrind together with kernel parameters such as swappiness and min_free_kbytes to achieve practical memory optimizations.

LinuxMemoryNUMA

0 likes · 55 min read

Master Linux Memory Performance: From Theory to Real‑World Optimization

Deepin Linux

May 5, 2026 · Fundamentals

Master Linux Memory Performance with HugePages

Linux’s default 4 KB pages cause massive page tables and TLB misses in high‑memory workloads; this article explains the HugePage mechanism, its types, how it reduces page‑table entries, improves TLB hit rates, lowers fragmentation, and provides step‑by‑step configuration for static and transparent huge pages in production.

LinuxMemory OptimizationPerformance tuning

0 likes · 39 min read

Master Linux Memory Performance with HugePages

Deepin Linux

May 4, 2026 · Fundamentals

Deep Dive into Linux VMA: Core Mechanisms of Virtual Memory Areas

Linux’s Virtual Memory Area (VMA) is the kernel’s core structure for managing a process’s address space, and this article explains its definition, key fields, linked‑list and red‑black‑tree organization, allocation, protection, page‑fault handling, copy‑on‑write, and practical usage examples.

Copy-on-WriteLinuxVMA

0 likes · 26 min read

Deep Dive into Linux VMA: Core Mechanisms of Virtual Memory Areas

Deepin Linux

May 3, 2026 · Backend Development

Master Lock‑Free Queues: Unlock the Core of High‑Concurrency Programming

This article demystifies lock‑free queues by explaining their low‑level implementation, atomic operations, memory barriers, and the four SPSC/MPMC models, while also covering ABA problems, false sharing avoidance, and practical C++ code examples to help developers truly understand high‑concurrency fundamentals.

CCASMPMC

0 likes · 44 min read

Master Lock‑Free Queues: Unlock the Core of High‑Concurrency Programming

Deepin Linux

May 2, 2026 · Fundamentals

Understanding Linux Workqueue Internals: Asynchronous Mechanism and Kernel Thread Coordination

This article explains the low‑level logic of Linux workqueues, detailing how asynchronous tasks are represented, how work items interact with kernel threads, the key data structures involved, scheduling strategies, and practical code examples for creating, queuing, and managing workqueue tasks.

AsynchronousCLinux

0 likes · 47 min read

Understanding Linux Workqueue Internals: Asynchronous Mechanism and Kernel Thread Coordination

Deepin Linux

May 1, 2026 · Fundamentals

Mastering Linux Kernel Threads: Core Mechanisms and Scheduling

This article explains Linux kernel threads from basic concepts to deep internals, covering their data structures, creation, execution flow, scheduling strategies, context‑switch overhead, synchronization primitives, interrupt handling, and a practical kswapd memory‑reclaim case study, providing concrete code examples and step‑by‑step analysis.

LinuxMemory ManagementScheduling

0 likes · 42 min read

Mastering Linux Kernel Threads: Core Mechanisms and Scheduling