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

[Stephan Mueller <smueller@chronox.de>]

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