Software Optimization for Early Linux Boot for Time Critical...
summary
Targets hard numbers: audio chime 200 ms, splash 500 ms, full UI 1.5 s; achieved an optimized boot under ~1.7 s (regular ~25 s) with the AM62P by using a multi-threaded SBL that boots R5 cores to run audio/splash, skips A53 SPL and U-Boot to jump to Trusted Firmware-A, and packages a stripped Linux kernel with a tiny initramfs. Profiling uses GPIOs and logic analyzers; MCU chime comes up in ~125 ms. Filesystem tests compare ext4, UBIFS and squashfs (UBI adds an unexpected ~48 ms vs ext4).
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chapters (15)
- 0:00Texas Instruments boot optimization
- 1:08Heterogeneous early boot problem
- 2:10TI AM62P boot sequence
- 3:54R5 SPL and DDR challenges
- 6:05Optimized bootloader design
- 7:54SPL limitations in OS stack
- 9:19Stage two bootloader integration
- 11:26MCU early boot for time-critical
- 12:52Kernel and filesystem optimization
- 13:34Unnecessary kernel configs removed
- 14:38Initramfs and init manager
- 15:22Filesystem mount performance
- 16:52Boot sequence benchmarks
- 17:58Upstreaming boot time challenges
- 19:22Q&A
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