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Learn about a unified boot time measurement framework designed to provide precise, scalable performance analysis across multi-processor embedded systems in this 48-minute conference talk from the Linux Foundation. Discover how this innovative framework overcomes traditional boot time measurement limitations by leveraging hardware timers to generate synchronized timestamps across heterogeneous subsystems. Explore the framework's architecture, which draws inspiration from U-Boot's bootstage mechanism and writes boot markers to reserved DDR memory regions instead of relying on fragmented logs. Master the use of a Linux utility that extracts and analyzes complete boot timelines via the devmem interface, enabling end-to-end visibility of the boot process. Understand how this vendor-agnostic, software-based approach helps developers pinpoint inefficiencies, optimize boot sequences, and improve system responsiveness across diverse embedded applications including IoT devices, industrial automation systems, automotive platforms, and networking equipment. Gain practical insights for optimizing boot performance in custom Linux BSPs, embedded RTOS systems, and real-time applications where fast and predictable boot times are critical for system success.
