Date: Tue, 7 Jul 2020 19:12:26 -0700 From: Oleksandr Tymoshenko <gonzo@bluezbox.com> To: Mark Millard <marklmi@yahoo.com> Cc: Peter Jeremy <peter@rulingia.com>, freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: freebsd-arm Digest, Vol 740, Issue 7 (Rock64 Ethernet testing) Message-ID: <20200708021226.GA77884@bluezbox.com> In-Reply-To: <3289DA3D-03FB-43BD-9A6A-956AC0A03B59@yahoo.com> References: <mailman.75.1593950402.45034.freebsd-arm@freebsd.org> <1731fbded28.10a3342f0357159.8148813293316485882@fkardame.com> <20200706204707.GA94158@bluezbox.com> <0A2E974E-39D3-46C8-8791-3BD914EBE7E9@yahoo.com> <0C77695E-A9D0-410A-B105-5B69823E17E2@yahoo.com> <EB92D6CC-940A-4429-A257-7D17955B8379@yahoo.com> <EFA17CEC-A2A2-4B0D-B63F-DB4E98CB2672@yahoo.com> <3289DA3D-03FB-43BD-9A6A-956AC0A03B59@yahoo.com>
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Mark Millard (marklmi@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
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