PROCESSOR-SDK-AM335X: Boot time optimization

Hello,

Could you please share more information about your use-case and your timing requirement? Also, are you using a minimal/cutdown filesystem?

Regards,
Krunal

Thank you for your reponse.

The goal for ou system is to start a Qt application under 10 seconds. Now, we haven't been able to boot under 13 seconds.

Of course, I use a minimal system based on a custom yocto distribution. 

The log of dmesg in my previous post was captured with an ext4 filesystem, but with an squashfs filesystem I am able to boot very fast but the application still take too much time to start :

INIT: version 2.88 booting
[    2.321710] FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[    2.435576] pvrsrvkm: loading out-of-tree module taints kernel.
[    2.452603] [drm] Initialized pvr 1.17.4948957 20110701 for 56000000.sgx on minor 1
[    2.565872] PVR_K: UM DDK-(4948957) and KM DDK-(4948957) match. [ OK ]
Loaded PowerVR consumer services.
Starting udev
[    2.909030] udevd[98]: starting version 3.2.7
[    3.038805] udevd[98]: specified group 'kvm' unknown
[    3.095252] udevd[99]: starting eudev-3.2.7
Fri Mar 27 13:05:08 UTC 2020
rm: can't remove '/tmp': Read-only file system
rm: can't remove '/etc/resolv.conf': Read-only file system
ln: /etc/resolv.conf: File exists
INIT: Entering runlevel: 5
Configuring network interfaces... done.
Starting system message bus: dbus.


Arago Project http://arago-project.org am335x-evm /dev/ttyS0

Guinault 2020.03 am335x-evm /dev/ttyS0

am335x-evm login: root

Between the eudev starting and the getty, there is aproximately 6 seconds and my Qt app does not start before getty. However, my Qt app start in the system runlevel with priority 4.