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Linux Tech Enthusiast
Linux Tech Enthusiast
Jan 12, 2026 · Fundamentals

Why Zero‑Copy Is Critical for High‑Performance I/O on Linux

The article explains how Direct Memory Access (DMA) eliminates CPU‑bound data copies, compares traditional I/O with zero‑copy techniques such as mmap and sendfile, and shows how reducing system calls and context switches can double file‑transfer throughput while highlighting the limits of kernel cache for large files.

DMALinux I/OZero-Copy
0 likes · 15 min read
Why Zero‑Copy Is Critical for High‑Performance I/O on Linux
Liangxu Linux
Liangxu Linux
Mar 2, 2024 · Fundamentals

How DMA and Zero‑Copy Revolutionize Linux I/O Performance

This article explains the principles of Direct Memory Access (DMA), compares it with traditional I/O, details the DMA data‑transfer workflow, and explores zero‑copy techniques such as mmap + write and sendfile, highlighting how they reduce context switches, data copies, and improve overall Linux I/O efficiency.

DMALinux I/OZero-Copy
0 likes · 15 min read
How DMA and Zero‑Copy Revolutionize Linux I/O Performance