How to reduce boot time in embedded android os.?

Question

Initially android os was booting in 28 secs. Already I have reduced it to 19 secs removing boot-delay,boot animation and disabling preloading of classes. I want to boot os within 10 secs. Please suggest me some tips kernel level or u-boot level to achieve this. Thanks in advance.

Answer 1

(i) Start by measuring the bootup time to profile and analyze the delay causing areas

• use Bootchart for Android
• Kernel prints in Message loggers (Printk)

... check this out http://embien.com/blog/android-boot-time-optimization-tools-analysis/

(ii) Typical delay causing areas are likely to be -

• Bootloader Init
• Kernel init
• Zygote class preloading ** you have addressed this already ?
• Package Scanning
• Starting Services

Check this http://processors.wiki.ti.com/index.php/Android_Boot_Time_Optimization#U-boot