Like others, I have sought to reduce boot time on the PocketBeagle, and I
have run into a few questions that maybe only Robert can answer.
First of all, this line appears to be wrong:
echo CD > os_desc/b_vendor_code
It gives me this error:
Feb 17 21:02:36 V2-2 sh[203]: sh: echo: I/O error
I added a bunch of echo statements to narrow down which line was generating
this, and I'm pretty sure this is it. It is the section that sets the
Windows 10 attributes.
The bigger issue is the time this script takes to run. I'm booting in a
tad under 40 seconds, and this script is the bulk of it. I have narrowed
down the offending section to this line:
systemctl restart dnsmasq || true
The log with my additional comments looks like this:
Feb 17 21:02:38 V2-2 sh[203]: am335x_evm: Starting usb1 network
Feb 17 21:02:38 V2-2 sh[203]: am335x_evm: Setting up dnsmasq
Feb 17 21:02:39 V2-2 sh[203]: Stopping udhcpd (via systemctl):
udhcpd.service.
Feb 17 21:02:39 V2-2 sh[203]: am335x_evm: dnsmasq: setting up for usb0/usb1
Feb 17 21:02:39 V2-2 sh[203]: am335x_evm: disable_connman_dnsproxy
Feb 17 21:02:39 V2-2 sh[203]: am335x_evm: finished disable_connman_dnsproxy
Feb 17 21:02:39 V2-2 sh[203]: am335x_evm: Restarting dnsmasq
Feb 17 21:03:06 V2-2 sh[203]: am335x_evm: LOG: dnsmasq is disabled in this
scrip
Now, I have just been going through the script trying to eliminate most of
the hardware tests since my board is fixed, and deleting what I don't think
I need. But there are some things that confuse me. This script disables
both udhcpd and dnsmasq. Why not just not auto-start those services or set
them to start when this script is complete? This script also seems to
touch some things that affect hostapd.
Is there any description on how this script interacts with other systemd
services? It clearly does some necessary things as disabling it does not
improve my boot performance, and the combination clearly gives a brilliant
"out of the box" experience for someone just starting out. The
combination, however, is a bit confusing when it comes to fine tuning.
--
For more options, visit http://beagleboard.org/discuss
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