Linux

Diagram of epoll and io_uring data paths

Deep Dive into Linux I/O Evolution: From epoll Readiness to io_uring Completion Models

A detailed look at the shift from epoll to io_uring, covering design, performance, and migration strategies for production engineers.

Illustration of memory pages being duplicated on write.

Deep Dive into Copy‑on‑Write Semantics: Memory Management and Performance in Modern Linux Kernels

A technical walkthrough of Linux’s copy‑on‑write mechanism, covering architecture, caching, and performance tuning for production workloads.

Diagram of a Linux cgroup v2 hierarchy with resource controllers.

Mastering cgroups v2 Resource Isolation: A Deep Dive into Unified Hierarchy and Control Mechanics

A practical guide to cgroups v2’s unified hierarchy, showing how to configure CPU, memory, and I/O limits with systemd and raw cgroup files.

Diagram of a sequence lock showing readers and writer.

How Sequence Locks Achieve Optimistic Reads in the Linux Kernel

A deep dive into Linux’s sequence lock (seqlock) mechanism, showing how it provides lock‑free reads while preserving consistency.

Diagram of TCP congestion window and data flow.

Where TCP Transmission Speed Meets the Congestion Window Boundary

A deep dive into how TCP’s congestion window governs transmission speed, with practical guidance for developers and sysadmins seeking higher network performance.