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Learn to implement regression testing for boot-time performance in the Linux kernel through this 39-minute conference talk from the Linux Foundation. Explore the challenges of measuring boot performance across different systems, including disparities in hardware performance, varying requirements for quickly-needed functionality, and differences in bootloader, kernel, and user-space configurations. Discover a comprehensive boot-time regression testing approach that utilizes reference value data files for different platforms, kernel versions, and configurations. Master the meta-data matching system used to select appropriate reference data files and understand how boot time data, including initcall durations and pre-selected boot operation durations, is compared with reference values to identify regressions in specific boot sequence elements. Examine the upstream status of this testing effort, review the supporting tools and methodologies, and analyze the issues encountered with this approach to boot performance regression testing.
