Shorten Device Boot Time for Automotive IVI - The Linux Foundation

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Boot Time Reduction:The traditional approaches mentioned by manydevelopers/speakers already
Qi Boot-loaderBoot-loader Improvements:Write our faster one!Developed by Openmoko and0xlabOnly one stage boot-loaderSmall footprint ~30KCurrently support− IMX31, Samsung 24xx,Beagleboard, PandaboardKISS concept− Boot device and load kernelQiBoot-oaderU-Boot + XLoaderSize ~30K ~270K+20KTime to Kernel < 1 s > 5sUsage Product EngineeringCode Simple ComplicatedAnother example:“Boot Time Optimizations”, Alexandre Belloni, ELCE 2012
Page 5 and 6: Disclaimer of Warranties• Technic
Page 9 and 10: http://elinux.org/Boot_Time
Page 11 and 12: $ bootchart bootchart.tgz -f pngBoo
Page 13 and 14: OProfileOutput Example$ opreport --
Page 15 and 16: PerfTimechart$ perf timechart recor
Page 17 and 18: BootchartOriginal “bootchartd”
Page 19 and 20: BootchartTo run:$ adb shell 'echo 1
Page 21 and 22: LogcatAndroid log utilityCan output
Page 23 and 24: StopwatchNot real stopwatchA utilit
Page 25 and 26: Boot-loader InitUsually constant ti
Page 27 and 28: Zygote Class PreloadingAndroid Fram
Page 29 and 30: PackageManager Package ScannigEvery
Page 31: Boot Time Reduction
Page 35 and 36: Optimize Android InitParallize init
Page 37 and 38: Filesystem OptimizationAccording to
Page 39 and 40: Lessons learnt• Complex userspace
Page 41 and 42: ARM Hibernation Solutions• swsup
Page 43 and 44: ARM Hibernation Diagram (2)Swap spa
Page 45 and 46: ARM Hibernation Diagram (4)4GBHard
Page 47 and 48: FastONDeveloped by OSLab of Nationa
Page 49 and 50: FastON Diagram (1)Write-out(rand.)f
Page 51 and 52: FastONThemachine isreadyThe time we
Page 53 and 54: Boot Time: Original vs. FastONThe h
Page 55 and 56: Android Wakelocks & TuxOnIce
Page 57 and 58: Suspend to DiskResume
Page 59 and 60: Example: Android on BeagleboardOMAP
Page 61 and 62: Hibernation Boot
Page 63 and 64: R-LoaderNormal suspend-to-disk appr
Page 65 and 66: Advanced Topics for integratingHibe
Page 67 and 68: Hibernation looks fine, why another
Page 69 and 70: Ideas about Checkpointing forAndroi
Page 71 and 72: Communication state restart• Crea
Page 73 and 74: Implementation Considerations• Ch
Page 75 and 76: Process StructureCT = DMTCP checkpo
Page 77 and 78: How DMTCP works (2/4)• LD_PRELOAD
Page 79 and 80: How DMTCP works (4/4)• Checkpoint
Page 81 and 82: Checkpoint under DMTCP(2/7)• Ask
Page 83 and 84:
Checkpoint under DMTCP(4/7)• Pre-
Page 85 and 86:
Checkpoint under DMTCP(6/7)• Post
Page 87 and 88:
Restart under DMTCP(1/6)• Restart
Page 89 and 90:
Restart under DMTCP(3/6)• Reopen
Page 91 and 92:
Restart under DMTCP(5/6)• Restore
Page 93 and 94:
DMTCP WorkflowRestartStart with dmt
Page 95 and 96:
DMTCP/Android: Additional Features(
Page 97 and 98:
More extensions in DMTCP/Android•
Page 99 and 100:
Technical Issues when modifyingDMTC
Page 101 and 102:
Observations from logcat--------- b
Page 103 and 104:
Mixed Model: Hibernation + Checkpoi
Page 105 and 106:
Timing diagram of Hibernation stage
Page 107 and 108:
Conclusion• No silver bullet for
Page 109:
http://0xlab.org
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Shorten Device Boot Time for Automotive IVI - The Linux Foundation

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