Boot Optimization

[Dylan Quinn]

Hello everyone,

I would like to reduce my boot time for the beaglebone. It currently takes about 30 seconds for it to boot, and I will be using all 3 usb gadgets.

My version output:

```

debian@beaglebone:~$ sudo /opt/scripts/tools/version.sh
[sudo] password for debian:
git:/opt/scripts/:[b39ec679648a6be8f25f48bd1c9784c1fc5a0c46]
eeprom:[▒▒▒▒*]
model:[TI_AM335x_BeagleBone_Green]
dogtag:[BeagleBoard.org Debian Buster IoT Image 2020-04-06]
bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot 2019.04-dirty]:[location: dd MBR]
UBOOT: Booted Device-Tree:[am335x-bonegreen.dts]
kernel:[5.4.52-ti-rt-r17]
nodejs:[v10.15.2]
/boot/uEnv.txt Settings:
pkg check: to individually upgrade run: [sudo apt install --only-upgrade <pkg>]
pkg:[bb-cape-overlays]:[4.14.20200403.0-0rcnee0~buster+20200403]
pkg:[bb-wl18xx-firmware]:[1.20200322.0-0rcnee0~buster+20200322]
pkg:[kmod]:[26-1]
pkg:[librobotcontrol]:[1.0.4-git20190227.1-0rcnee0~buster+20190327]
pkg:[firmware-ti-connectivity]:[20190717-2rcnee1~buster+20200305]
groups:[debian : debian adm kmem dialout cdrom floppy audio dip video plugdev users systemd-journal bluetooth netdev i2c gpio pwm eqep remoteproc admin spi iio docker tisdk weston-launch xenomai cloud9ide]
cmdline:[console=ttyO0,115200n8 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait]
dmesg | grep remote
[    2.659539] remoteproc remoteproc0: wkup_m3 is available
[    2.940239] remoteproc remoteproc1: 4a334000.pru is available
[    2.952601] remoteproc remoteproc2: 4a338000.pru is available
[    2.967349] remoteproc remoteproc0: powering up wkup_m3
[    2.970564] remoteproc remoteproc0: Booting fw image am335x-pm-firmware.elf, size 217168
[    2.971292] remoteproc remoteproc0: remote processor wkup_m3 is now up
dmesg | grep pru
[    2.940239] remoteproc remoteproc1: 4a334000.pru is available
[    2.940546] pru-rproc 4a334000.pru: PRU rproc node /ocp/interconnect@4a000000/segment@0/target-module@300000/pruss@0/pru@34000 probed successfully
[    2.952601] remoteproc remoteproc2: 4a338000.pru is available
[    2.952904] pru-rproc 4a338000.pru: PRU rproc node /ocp/interconnect@4a000000/segment@0/target-module@300000/pruss@0/pru@38000 probed successfully
dmesg | grep pinctrl-single
[    2.203986] pinctrl-single 44e10800.pinmux: 142 pins, size 568
dmesg | grep gpio-of-helper
[    2.207001] gpio-of-helper ocp:cape-universal: ready
lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
END
```

systemd-analyze output

```

debian@beaglebone:~$ systemd-analyze blame
         33.892s generic-board-startup.service
         13.769s dnsmasq.service
          8.988s lighttpd.service
          7.115s php7.3-fpm.service
          5.648s loadcpufreq.service
          2.141s systemd-logind.service
          1.774s wpa_supplicant.service
          1.649s us...@1000.service
          1.578s systemd-journald.service
          1.541s cpufrequtils.service
          1.493s networking.service
          1.102s systemd-timesyncd.service
          1.094s systemd-fsck-root.service
           954ms systemd-user-sessions.service
           777ms kmod-static-nodes.service
           763ms fake-hwclock.service
           751ms systemd-tmpfiles-setup.service
           691ms dev-mqueue.mount
           655ms ifupdown-pre.service
           653ms rsyslog.service
           596ms systemd-udevd.service
           591ms systemd-update-utmp.service
           587ms systemd-modules-load.service
           470ms user-run...@1000.service
           457ms systemd-journal-flush.service
           429ms sys-kernel-debug.mount
           405ms systemd-sysusers.service
           401ms sys-fs-fuse-connections.mount
           392ms connman.service
           377ms systemd-sysctl.service
           363ms systemd-random-seed.service
           311ms systemd-remount-fs.service
           293ms sys-kernel-config.mount
           183ms systemd-tmpfiles-setup-dev.service
           165ms systemd-update-utmp-runlevel.service
```

[Dylan Quinn]

Just to specify- it looks like am335x_evm.sh is causing the long boot time. What can I modify in the script to drastically reduce the 30 second time?

[Robert Nelson]

On Tue, Sep 29, 2020 at 7:07 AM Dylan Quinn <dq37...@gmail.com> wrote:
>
> Just to specify- it looks like am335x_evm.sh is causing the long boot time. What can I modify in the script to drastically reduce the 30 second time?

You can disable it, but the big delay in that script is loading the
usb gadget drivers.. Which you stated you wanted..

Regards,

--
Robert Nelson
https://rcn-ee.com/