Accelerating Linux Boot Time: Techniques and Strategies for Optimal Performance
summary
Measurements combine systemd-analyze and CNTVCT counters plus dmesg/journal parsing to separate firmware, kernel pre-timer and userspace; pre-timer falls from 720 ms to 101 ms and overall boots drop from 18.5 s to 4.8 s, with the initramfs reduced from ~500 ms to ~125 ms and first app start around 790 ms. Techniques include building storage drivers into the kernel, trimming initramfs to five services (initramfs trimmed to five services), using RCU expedited mode, dracut --omit, EROFS for static root, and nightly continuous testing.
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chapters (14)
- 0:00Intro
- 2:33Measuring Boot Time
- 7:59Optimizations Techniques
- 10:23Kernel Optimization
- 18:51InFS Optimization
- 23:16Loading Kernel Modules
- 25:10Udev Configuration
- 25:54Optimization Work
- 26:58Next Steps
- 28:30Optimizations
- 29:26Storage Modules
- 31:54Dedeprecating Old Stuff
- 33:10Device Optimizations
- 33:47Kernels
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