Action Item #472
Updated by Hammel about 5 years ago
"Some things I can review":http://elinux.org/images/9/97/Boot_one_second_altenberg.pdf
# Switch to LZO for kernel compression
# Delay Loop Calibration: ''lpj=''; can save > 100ms on ARMv5 based systems (boot and look for Calilbrating Delay Loop and check what lpj is set to, then use that on command line)
# Parameters for boot time analysis: ''initcall_debug'', ''printk_time=1''
# Switch rootfs to UBIfs - better for flash devices
# Use initramfs (see slides)
# Integrate as many init scripts as possible into single program (my own init program), then use init=myprog
I probably won't get to <1s boot time without bootloader access but I can certainly get to <10s, possibly to <5s.
References
* "LPC: Booting Linux in five seconds":https://lwn.net/Articles/299483/
* "Bootchart":https://elinux.org/Bootchart for graphing the boot process
* "Bootchar2":https://github.com/mmeeks/bootchart