Boot time

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

Hi , Iam using
Jetpack 4.6.4
Jetson nano L4T 32.7.1

while i flashed to emmc iam able to boot properly
but while booting from sd card it takes

systemd-analyze
Startup finished in 2.139s (kernel) + 1min 29.162s (userspace) = 1min 31.301s
graphical.target reached after 1min 29.122s in userspace

systemd-analyze blame
37.478s docker.service
22.711s snapd.service
18.983s ModemManager.service
18.926s networkd-dispatcher.service
18.406s NetworkManager.service
17.903s nv.service
13.047s containerd.service
11.243s user@120.service
10.426s nv-l4t-usb-device-mode.service
10.075s snapd.seeded.service
9.063s udisks2.service
8.819s alsa-restore.service
8.767s accounts-daemon.service
7.877s polkit.service
7.206s grub-common.service
7.191s nv-l4t-usb-device-mode-runtime.service
6.807s gdm.service
6.109s ssh.service
6.009s nvpmodel.service
5.954s ubuntu-fan.service
5.229s apport.service
4.406s systemd-user-sessions.service
4.079s nvphs.service
3.528s user@1000.service
2.980s kerneloops.service
1.552s setvtrgb.service
1.543s dev-mmcblk0p1.device
968ms networking.service
847ms speech-dispatcher.service
623ms avahi-daemon.service
594ms pppd-dns.service
589ms nvfb-early.service
588ms rsyslog.service
587ms ubiquity.service
582ms systemd-udevd.service
540ms systemd-logind.service
538ms systemd-modules-load.service
382ms systemd-udev-trigger.service
357ms wpa_supplicant.service
212ms packagekit.service
204ms bolt.service
196ms systemd-timesyncd.service
194ms keyboard-setup.service
177ms nvfb.service
172ms rpcbind.service
170ms systemd-resolved.service
162ms upower.service
146ms resolvconf-pull-resolved.service
131ms nfs-config.service
126ms console-setup.service
123ms systemd-tmpfiles-setup.service
90ms dns-clean.service
87ms systemd-tmpfiles-setup-dev.service
79ms systemd-journald.service
71ms plymouth-read-write.service
69ms colord.service
64ms systemd-journal-flush.service
48ms systemd-remount-fs.service
38ms sys-kernel-debug.mount
37ms systemd-update-utmp.service
37ms systemd-sysctl.service
36ms kmod-static-nodes.service
35ms systemd-update-utmp-runlevel.service
33ms dev-mqueue.mount
32ms dev-zram2.device
31ms dev-zram1.device
30ms systemd-random-seed.service
30ms dev-zram0.device
24ms run-rpc_pipefs.mount
22ms dev-zram3.device
17ms dev-hugepages.mount
14ms proc-sys-fs-binfmt_misc.mount
14ms rtkit-daemon.service
13ms resolvconf.service
12ms snapd.socket
8ms sys-fs-fuse-connections.mount
7ms sys-kernel-config.mount
5ms plymouth-quit-wait.service
4ms docker.socket

how can i reduce this boot time while booting from sd card

3

Hi amb018753,

Are you using the devkit or custom board for Jetson Nano?

It seems you are using the custom carrier board since we don’t have both eMMC and SD exist at the same time.

The command you shared is used to check the boot time for system service.
There’re still bootloader/kernel affecting the boot time.
Which boot stage do you want to optimize? I would suggest you enable the timestamp in serial console and check the log during boot up.

4

im using custom board

im new to nvidia
how can i optimise it
could you please guide me on this ?

5

Please enable the timestamp in serial console first.

You can refer to NVIDIA Jetson Linux Developer Guide : Kernel Customization | NVIDIA Docs for the boot time optimization for boot time.

7

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.