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 Stephan,

On Thursday, 2 January 2025 at 10:06:25 Stephan Mueller <smueller@chronox.de> wrote:
> Am Dienstag, 31. Dezember 2024, 15:42:16 CET schrieb Francesco Valla:
> 
> Hi Francesco,
> 
> > The ultimate goal here is reducing the boot time to the minimum possible
> > without removing functionalities. The purpose is educational, but on the
> > long term it will probably be beneficial to my work too (as I work in the
> > automotive industry, where each millisecond counts).
> > 
> > There isn't anything inherently wrong, at the moment I am trying to
> > determine what is real initialization time and what instead is an actual
> > waste of time (e.g.: excessive probe deferral). The aforementioned
> > jent_mod_init (on which Tim I think is working on some level) is one of the
> > longest single inits, but to be honest I don't know much about all the
> > entropy stuff.
> > 
> > Wishing you the best for the new year,
> 
> Same to you!
> 
> Thanks for your answer. With that, if you desire it, I can try to help you 
> lowering the boot time at least in light of the Jitter RNG. This, however, 
> requires a bit of analysis which you need to help me with as I do not have a 
> board you discuss. But the Jitter RNG has some turning knobs that can be used.
> 
> Ciao
> Stephan
> 

That would be wonderful! Whenever you have the time, please let me know what
analysis you need.

Regards,
Francesco