Between bootarg and systemd service

vinothkumars — Sat, 23 Feb 2019 10:35:46 GMT

Hi All,

I am working on imx6solo + Orion Linux. I got some observation when setting boot argument.

i> ii> bootarg with ip parameter

if "setenv bootargs 'console=ttymxc0,115200 ip=dhcp nosmp root=/dev/mmcblk2p1 rootwait'"

systemd-analyze blame

54.909s systemd-journald.service
48.501s dev-mmcblk0p1.device
16.426s systemd-journal-flush.service
10.382s udev-trigger.service
9.470s systemd-tmpfiles-setup.service
9.398s systemd-timesyncd.service
8.495s systemd-udevd.service
6.603s systemd-update-utmp.service
3.911s systemd-logind.service
3.527s remount-rfs-rw.service
3.448s systemd-tmpfiles-setup-dev.service
3.303s sys-fs-fuse-connections.mount
3.139s systemd-sysctl.service
2.358s systemd-remount-fs.service
2.175s udev.service
1.590s sys-kernel-debug.mount
1.369s systemd-random-seed.service
1.210s tmp.mount
1.113s systemd-update-utmp-runlevel.service
193ms systemd-networkd.service
191ms systemd-resolved.service

ii> bootarg without ip parameter

if "setenv bootargs 'console=ttymxc0,115200 nosmp root=/dev/mmcblk2p1 rootwait'"

systemd-analyze blame

5.306s systemd-udev-trigger.service
5.293s dev-mmcblk0p1.device
3.332s systemd-journald.service
3.258s systemd-timesyncd.service
3.208s systemd-journal-flush.service
2.226s systemd-tmpfiles-setup.service
2.002s systemd-update-utmp.service
1.440s systemd-udevd.service
1.321s systemd-sysusers.service
1.065s udev-trigger.service
867ms sys-fs-fuse-connections.mount
864ms systemd-update-utmp-runlevel.service
769ms systemd-remount-fs.service
768ms sys-kernel-debug.mount
742ms systemd-sysctl.service
738ms remount-rfs-rw.service
708ms systemd-tmpfiles-setup-dev.service
641ms systemd-update-done.service
353ms udev.service
258ms systemd-journal-catalog-update.service
231ms ldconfig.service
117ms systemd-random-seed.service

What could be the reason ?

Regards,

VinothS

Re: Between bootarg and systemd service

b36401 — Wed, 27 Feb 2019 07:37:49 GMT

Please note that "systemd-analyze blame" provides only an estimation.
Also please note that some services take a time but are not listed clearly in the log and their time may be noted as spent by some another service.
So you need to compare total boot time with and without networking.

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