freebsd-arm Digest, Vol 740, Issue 7 (Rock64 Ethernet testing)

[Oleksandr Tymoshenko]

Mark Millard (marklmi at yahoo.com) wrote:
> Any chance that the delays (or other parameters) depend
> on the operating temperature(s) of some parts?
> 
> If yes, then some of the following about the Rock64 V2
> context that I have access to might be relevant to
> explaining my already reported V2 results (not much
> for Retr):
> 
> A) The Rock64 has a "case" that is really just a top
>    and a bottom with posts: open on all 4 sides.
> 
> B) It has a fan blowing down on the board from the
>    top.
> 
> C) It has a heat sink on the SOC, which the fan blows
>    on directly.
> 
> D) It has a heat sink on the RAM, which the fan also
>    blows on directly.
> 
> (I've not dealt with a more modern non-debug kernel
> build yet. It still may be some time before I deal
> with that.)

Temperature is not likely to be a factor in the delay values.
Rock64 V2 has a known issue with Gigabit ethernet stability:

https://forum.pine64.org/showthread.php?tid=7545
https://sanisimov.com/2019/08/fixing-rock64-v2-gigabit-ethernet/

Althought judging by description it's more like an almost complete
network lock-up and not performance degradation.

I received another board with RK3328 today and will investigate
the issue further.

-- 
gonzo