Boot time speedup - Githubissues

adeebshihadeh commented 1 year ago

AGNOS 6:

XBL: 3.5s
ABL: 4.7s
Kernel: 10.5s
setup shows on screen: 38s

adeebshihadeh commented 1 year ago

Added a script to print boot times. Here's where we're at as of 1e0f240f38622f752e926a0edb53efe9f23d5833

comma@tici:/data$ ./analyze-boot-time.py
------  ----  -----  ---
PON     1.5   1.5    9%
XBL     2.4   3.9    14%
ABL     3.7   7.6    21%
kernel  3.59  11.19  20%
weston  6.37  17.57  36%
comma   0.01  17.58  0%
onroad  ?     ?      -
------  ----  -----  ---

Further reduction:

up to 3s off the ABL, if both of these are fixed
- timeout fastboot faster if nothing plugged in (relies on USB enumeration)
- init screen faster for factory reset
1s off kernel? by turning stuff off and deferring init
weston includes everything from /sbin/init all the way to weston being ready, lots to cut down here
- udev in particular is slow
time-to-onroad isn't measured by the script yet, but that's at least another 5s

adeebshihadeh commented 7 months ago

Useful commands

systemd-analyze time
systemctl list-dependencies comma.service
journalctl -u weston.service -u weston-ready.service -o short-monotonic

References

https://elinux.org/Boot_Time

andiradulescu commented 7 months ago

My current (early) progress is running ./analyze-boot-time.py + running the useful commands from the previous comment + analyzing dmesg with initcall_debug and generating a boot.svg with scripts/bootgraph.pl.

commaai / agnos-builder

Boot time speedup #110