[root@testing02 system]# systemd-analyze critical-chain network.service
The time after the unit is active or started is printed after the "@" character.
The time the unit takes to start is printed after the "+" character.

network.service +5.979s
└─NetworkManager.service @6.264s +158ms
  └─cleanup_defgw.service @6.097s +159ms
    └─cloud-init-local.service @1.590s +4.506s
      └─local-fs.target @1.589s
        └─local-fs-pre.target @1.588s
          └─systemd-tmpfiles-setup-dev.service @1.427s +160ms
            └─kmod-static-nodes.service @1.382s +42ms
              └─systemd-journald.socket
                └─-.slice

[root@testing02 system]# systemd-analyze critical-chain NetworkManager.service
The time after the unit is active or started is printed after the "@" character.
The time the unit takes to start is printed after the "+" character.

NetworkManager.service +158ms
└─cleanup_defgw.service @6.097s +159ms
  └─cloud-init-local.service @1.590s +4.506s
    └─local-fs.target @1.589s
      └─local-fs-pre.target @1.588s
        └─systemd-tmpfiles-setup-dev.service @1.427s +160ms
          └─kmod-static-nodes.service @1.382s +42ms
            └─systemd-journald.socket
              └─-.slice