systemd-analyze结果：
Startup finished in 1.012s (kernel) + 6.284s (initrd) + 16.908s (userspace) = 24.204s
multi-user.target reached after 13.189s in userspace查看详细启动项
systemd-analyze blame --no-pager结果：
3.749s kdump.service
3.484s firewalld.service
3.306s vdo.service
2.617s sssd.service
2.433s tuned.service
2.383s initrd-switch-root.service
2.350s NetworkManager-wait-online.service
2.098s lvm2-monitor.service
2.073s polkit.service
1.844s systemd-logind.service
1.733s dracut-initqueue.service
942ms chronyd.service
763ms systemd-journald.service
694ms systemd-udevd.service
558ms sysroot.mount
412ms systemd-vconsole-setup.service
360ms dnf-makecache.service
344ms systemd-udev-trigger.service
297ms systemd-remount-fs.service
270ms auditd.service
258ms initrd-parse-etc.service
240ms systemd-tmpfiles-setup-dev.service
230ms nis-domainname.service
227ms systemd-fsck@dev-disk-by\x2duuid-77B9\x2d3186.service
217ms dracut-pre-pivot.service
217ms NetworkManager.service
215ms dracut-cmdline.service
208ms dracut-pre-udev.service
200ms lvm2-pvscan@8:3.service
192ms sshd.service
182ms dev-mapper-cl\x2dswap.swap
178ms dev-hugepages.mount
163ms kmod-static-nodes.service
156ms boot.mount
143ms user@0.service
137ms systemd-fsck@dev-disk-by\x2duuid-7833e10b\x2dc9d5\x2d4fd7\x2da078\x2d67985eff7d11.service
112ms rngd-wake-threshold.service
109ms systemd-tmpfiles-setup.service
108ms systemd-sysctl.service
89ms import-state.service
84ms dev-mqueue.mount
80ms sys-kernel-debug.mount
74ms systemd-user-sessions.service
61ms initrd-cleanup.service
47ms systemd-fsck-root.service
41ms dracut-shutdown.service
29ms systemd-random-seed.service
28ms systemd-update-utmp-runlevel.service
25ms boot-efi.mount
25ms systemd-journal-flush.service
20ms systemd-tmpfiles-clean.service
16ms systemd-update-utmp.service
13ms sys-kernel-config.mount
9ms initrd-udevadm-cleanup-db.service