On Saturday, 5 June, 2021 3:38:41 AM IST Dino Joseph Mycle wrote: > Hello all, > > I am trying t improve my embedded system boot time which uses systemd. > debugging understood that it spends lot time around ~1.3 second in my iMX6 > board running @800MHz on initialization of the systemd > > > > plotting the graph using “systemd-analyze plot > /tmp/bootime.svg “ i am > seeing that, it spend around 1 second reading config file and generating > dyunamic file at /run/systemd. And then it start executing unit files > > > > My questions are, since its an embedded system where the hardware and > configuration are always constant once you build the image so all these > dynamic stuff reading from files are not required
> 1) what all i should be doing to make the boot faster This is more for desktop but you can refer to this: https://wiki.archlinux.org/title/Improving_performance/Boot_process > 2) is there a way I can configure the files statically at compile > time, which will reduce the time of reading each file from eMMC. Depend on which generator. For fstab, you can place mount files in /etc/ systemd/ directory. Then you can disable that generator via the kernel command line. Also If you use sysvinit generator, try to manualy convert it. > 3) How can I disable the mounting of the root partition from the > systemd-generators as I see the kernel mounts it in my systemd and gets > remounted, even though I commented the line in fstab If you think there is no issue in doing so, you can mask the unit. > > > Thanks for the support > Dino
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