Linux Kernel Journey

Dec 4, 2024 · Operations

How rtla timerlat Measures Kernel Latency: Principles and Analysis

This article explains the inner workings of rtla timerlat’s latency testing, contrasting it with cyclictest, detailing kernel‑mode tracer setup, timer handling, context differentiation, and how the collected trace events are processed by the user‑space rtla application to produce detailed IRQ and thread latency metrics.