Shorten Device Boot Time for Automotive IVI - The Linux Foundation

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Disclaimer of Warranties• Technical background knowledge in thispresentation is based on the experience with ourcustomers / partners such as CSR and MediaTek.– We share non-confidential parts to endorse thecollaboration of <strong>Linux</strong> ecosystem.• We make no warranty, either express or impliedwith respect to any product, and specially disclaimthe correctness or real-world behavior.
Page 6: Agenda(1) Concepts: Analysis, Strat
Page 10 and 11: Traditional Linux Environment:print
Page 12 and 13: StraceTrace system calls during pro
Page 14 and 15: PerfRecording:$ perf record -a -f^C
Page 16 and 17: Android Environment
Page 18 and 19: To build:$ cd system/core/init$ tou
Page 20 and 21: StraceModify init.rc fromservice zy
Page 22 and 23: Dalvik Method TracerMethod tracer i
Page 24 and 25: Android Boot Time Analysis
Page 26 and 27: Kernel InitMostly usual suspectsip_
Page 28 and 29: Zygote Class PreloadingCan use the
Page 30 and 31: System Services StartingLast stage
Page 32 and 33: Boot Time Reduction:The traditional
Page 34 and 35: Kernel Boot TimeFullow the standard
Page 36 and 37: Optimize Class PreloadingTrade-off
Page 38 and 39: Toothpaste EffectObserved by Sony D
Page 40 and 41: Part I:Hibernation based Technologi
Page 42 and 43: ARM Hibernation Diagram (1)4GBWrite
Page 44 and 45: ARM Hibernation Diagram (3)4GBRead-
Page 46 and 47: QuickBootDeveloped by Japanesecompa
Page 48 and 49: Memory AnalysisworkingsetDirty page
Page 50 and 51: FastON Diagram (2)Read-in(rand.)fla
Page 52 and 53:
Boot Time: Original vs. FastONOrigi
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Boot Time: Original vs. FastON
Page 56 and 57:
TuxOnIce PatchTuxOnIce (was Softwar
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Android WakelocksAn aggressive appr
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Original Boot Sequence
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Further optimizations:No Need for f
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R-Loader0xlab proposed “Resume-Lo
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Part II:Userspace solution: Checkpo
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Basic Idea of checkpointing:Process
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Communication state checkpoint• A
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Existing Checkpointing mechanisms
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DMTCP• Distributed Multi-Threaded
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How DMTCP works (1/4)• MTCP : com
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How DMTCP works (3/4)• Additional
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Checkpoint under DMTCP(1/7)• dmtc
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Checkpoint under DMTCP(3/7)• Susp
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Checkpoint under DMTCP(5/7)• Writ
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Checkpoint under DMTCP(7/7)• Resu
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Restart under DMTCP(2/6)• Fork us
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Restart under DMTCP(4/6)• Restore
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...Restart under DMTCP(6/6)• Resu
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OS Features supported by DMTCP• T
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Android Binder support for DMTCP•
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Android specific modifications• R
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Checkpoint for Zygote• Experiment
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Part III:Mixted Model
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Technical Challenges of Mixed Model
Page 106 and 107:
Time diagram of Device Resuming
Page 108 and 109:
Reference• Embedded Linux Wiki: h
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Shorten Device Boot Time for Automotive IVI - The Linux Foundation

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