Shorten Device Boot Time for Automotive IVI - The Linux Foundation

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Kernel InitMostly usual suspectsip_auto_configUSB initFlash driver initializationFullow the standard Kernel optimizing guide:http://elinux.org/<strong>Boot</strong>_<strong>Time</strong>Avoid loading unneeded kernel module at boot time
Zygote Class PreloadingAndroid Framework has thousands of Java classesPreloaded by Zygote and instantiated in its heapTo improve Application startup time and save memoryControlled by resource: preloaded-classesframeworks/base/preloaded-classes
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: Boot-loader InitUsually constant ti
Page 29 and 30: PackageManager Package ScannigEvery
Page 31 and 32: Boot Time Reduction
Page 33 and 34: Qi Boot-loaderBoot-loader Improveme
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:
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