splice

Analysis of Linux Kernel Source Code: How sendfile and splice Achieve Zero-Copy

by
Analysis of Linux Kernel Source Code: How sendfile and splice Achieve Zero-Copy

Previously, we introduced several Linux zero-copy technologies, among which sendfile and splice are very similar. Both system calls allow data to be moved/copied directly in kernel space without passing through user space. In this article, we will analyze the kernel source code of these two system calls to see how they achieve zero-copy. 1. Analysis … Read more

Linux Kernel Zero-Copy: The Art of Efficient Data Transfer

by
Linux Kernel Zero-Copy: The Art of Efficient Data Transfer

“Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.” — Antoine de Saint-Exupéry In 1991, when Linus Torvalds hammered out the first lines of Linux kernel code in his Helsinki University dorm room, he couldn’t have imagined that his “hobby project” would become the … Read more