Re: [boot-time] jent_mod_init on beagleplay (was RE: [boot-time] [RFC] analyze-initcall-debug.py - a tool to analyze the initcall debug output

[Francesco Valla <francesco@valla.it>]

Hi Shankari,

On Sunday, 29 December 2024 at 19:52:29 Shankari <beingcap11@gmail.com> wrote:
> Hi
> 
> I wanted to provide an update on my recent contributions to the BeaglePlay
> project. I have recently started contributing and have been analyzing the
> boot time of the init process. Below is the output from the system log:
> 
> debian@BeaglePlay:~$ dmesg | grep "init process"
> [    1.480490] Run /init as init process
> 
> Moving forward, I plan to explore ways to modify the command line and
> further investigate the data used for SIG analysis. This will help me gain
> a deeper understanding of the boot process and its performance
> characteristics.

I started the same journey around a week ago, and it's proving a valuable
experience.

After some trimming, I reached a (reported) init startup time of around 0.6s:

root@beagleplay-ti:~# dmesg|grep /sbin
[    0.630046] Run /sbin/init as init process

The result above was obtained on a slightly modified 6.12.4 kernel with a
custom configuration (I am still thinking about the modifications, as they are
a bit unorthodox, but I can share them as well as the defconfig if you are
interested).
> 
> Please let me know if you have any suggestions or areas where I could focus
> my efforts.

In general, I'd suggest to use a recent kernel, as I observed a consistent
reduction of boot time between e.g. 6.6.x and 6.12.x.

> 
> Best regards,
> 
> Shankari
>

Regards,

Francesco