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How To Get Accurate Kernel Boot Time
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Classroom Contents
Linux Kernel Fastboot on the Way
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- 1 Intro
- 2 Kernel Fastboot
- 3 Agenda
- 4 Why we worked on boot optimization
- 5 Platform Brief Intro
- 6 Methodology - 3 Steps
- 7 How To Get Accurate Kernel Boot Time
- 8 Profile Tools
- 9 Analyze
- 10 How the Boot Time Is Consumed
- 11 Hotspots Overview
- 12 Boottime Hotspots
- 13 Too Few Drivers Use Asynchronous Probe
- 14 Original Boot
- 15 Boot With Asynchronous Probe
- 16 RootFS Mounting is a Critical Path
- 17 Highest CPU Frequency Booting
- 18 Kernel Modules and Config
- 19 Universality vs Performance
- 20 In-kernel Deferred Memory Init
- 21 Asynchronous Probe May Mess the Device Index
- 22 Efficient Firmware Init
- 23 Parallize SMP Initialization
- 24 systemd (user space)
