https://riyaneel.github.io/tags/ipc/ Recent content in Ipc on System & Software Engineering Hugo -- 0.160.1 en-us Thu, 16 Apr 2026 01:23:00 +0100 https://riyaneel.github.io/posts/kernel-tax/ Thu, 16 Apr 2026 01:23:00 +0100 https://riyaneel.github.io/posts/kernel-tax/ Every pipe round-trip crosses the user/kernel boundary four times. Each crossing costs a minimum of 101 ns on modern hardware. Shared memory crosses it zero times. A forensic breakdown of what the kernel actually charges per message, and why Tachyon reaches 56.5 ns where pipes cost 6.2 µs.