Dear Alien,
Am 10.05.25 um 10:24 schrieb Alien Kong:
I'm seeing an unexpected 90s delay between systemd-sysctl.service and
systemd-resolved.service
in our boot sequence (systemd 255.4-1ubuntu8.4, custom embedded board).
systemd-analyze critical-chain shows:
multi-user.target @1min 54.340s
└─user_medium_priority.service @1min 32.653s +21.686s
└─basic.target @1min 32.617s
└─sockets.target @1min 32.615s
└─ssh.socket @1min 32.614s
└─sysinit.target @1min 32.580s
└─systemd-resolved.service @1min 32.185s +394ms
└─systemd-sysctl.service @2.726s +89ms
└─systemd-modules-load.service @1.932s +577ms
└─systemd-journald.socket @1.911s
└─-.mount @599ms
└─-.slice @598ms
We have verified no explicit dependency holding this back.
From the information of systemd-analyze blame, the startup time of each
service is normal.
21.686s user_medium_priority.service
2.537s nv_duv3.service
1.996s dev-vblkdev30.device
1.993s dev-vblkdev0.device
1.818s dev-vblkdev2.device
1.766s dev-vblkdev4.device
1.762s dev-vblkdev5.device
1.670s dev-vblkdev3.device
794ms dev-vblkdev6.device
792ms dev-vblkdev15.device
785ms e2scrub_reap.service
730ms systemd-logind.service
711ms dev-vblkdev13.device
703ms dev-vblkdev8.device
667ms dev-vblkdev14.device
657ms dev-vblkdev7.device
635ms dev-vblkdev9.device
577ms systemd-modules-load.service
550ms systemd-networkd.service
394ms systemd-resolved.service
367ms ap-com-daemon.service
286ms systemd-udev-trigger.service
253ms user@1000.service
248ms systemd-tmpfiles-setup.service
227ms ssh.service
124ms systemd-tmpfiles-clean.service
119ms systemd-tmpfiles-setup-dev.service
116ms systemd-user-sessions.service
114ms systemd-tmpfiles-setup-dev-early.service
...
Any ideas for further investigation of this situation? Thanks~
Any insight would be appreciated.
Please paste the output of `journalctl -b` when booted with `debug` on
the Linux kernel command line. Please also provide the service units of
the two relevant services (`systemctl cat systemd-resolved`).
Kind regards,
Paul
