Timerlat: Real-Time Linux Scheduling Latency Measurements, Tracing, and Analysis
Year: 2025
Type: article
Abstract: A trend in many embedded devices is the move from hardware-based to software-defined, such as software-defined networks and software-defined PLCs. This trend is motivated by multiple aspects, including the availability of complex software stacks and the consolidation of multiple devices into a single larger system. Due to its real-time capabilities and flexibility, Linux is the operating system of choice for many applications, including time-sensitive ones. However, assessing and debugging timing violations, especially those caused by scheduling latency, is challenging with the current state-of-the-art tools. This paper presentstimerlat, a tool that integrates scheduling latency measurements, tracing, and analysis in an easy-to-use interface. Its output includes an auto-analysis, providing insightful details on the composition of the scheduling latency. Experimental results are reported, evaluating the effectiveness of timerlat in assessing the latencies, considering different setups and workloads.
Source: IEEE Transactions on Computers
Institution: Scuola Superiore Sant'Anna
Language: English
Topic: Real-Time Systems Scheduling
Subfield: Hardware and Architecture
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4410087307