RockPro64

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26 Feb 2019 22:16 #127203 by andypugh
Replied by andypugh on topic RockPro64
In theory you can resolve the conflicts manually, but it is a lot of work especially in code that you don't necessarily understand.

Is there anything useful in this thread?
forum.armbian.com/topic/7301-booting-a-r...mments#comment-55457

(I just did a google search)

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27 Feb 2019 01:16 #127219 by blazini36
Replied by blazini36 on topic RockPro64
I saw this previously but I did not post it because I wasn't 100% sure that this is what it looks like it is. Rockchip has an "rt" development branch. I can't tell if this is a real-time patched kernel, preempt or otherwise.

Pine generally seems to use Ayufun kernels so the Rockchip kernel is likely missing some board specific changes.
https://github.com/rockchip-linux/kernel/tree/develop-4.4-rt176

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08 May 2019 08:25 - 08 May 2019 21:06 #133115 by vre
Replied by vre on topic RockPro64
This repo has realtime 4.4.167 kernel for 3399 soc
github.com/rockchip-linux/kernel/tree/develop-4.4-rt
i have not tested yet but seems ok.
Last edit: 08 May 2019 21:06 by vre.

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23 Jul 2019 10:04 #140283 by kostas
Replied by kostas on topic RockPro64
Did you have any luck with these boards?

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29 Jul 2019 13:57 #140886 by vre
Replied by vre on topic RockPro64
No.
rt kernel with default .config does not work .

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29 Jul 2019 14:23 #140887 by blazini36
Replied by blazini36 on topic RockPro64
What kernel did you use? One from the rockchip repo? Did everything on the rock pro work right with this kernel?

Getting linuxcnc to work with it shouldn’t be that big of a deal, it’s getting an RT kernel to work on the board if the board manufacturer didn’t supply it that can be a problem.

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30 Jul 2019 06:14 - 30 Jul 2019 06:16 #140940 by vre
Replied by vre on topic RockPro64
Last edit: 30 Jul 2019 06:16 by vre.

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02 Sep 2019 22:48 #143963 by acondit
Replied by acondit on topic RockPro64
I built the linux-stable-rt-4.19.31-rt18 kernel and installed it.
I downloaded the cyclictest suite and ran it several times. The average latency is 3 microseconds. Running it via ssh the max was 45 or 48 until I logged from a wireless keyboard and the HDMI video. I started X and LXQT during that startup, the max went to 58.

I just started it again with the -h option to produce a histogram, now the max is 62 and the average is 4.

Alan

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05 Sep 2019 18:18 #144257 by bellcopter
Replied by bellcopter on topic RockPro64
What distro did you use for your build? Those are some great looking latency tests. I'm looking to put a Mesa PCIE card into the Rockpro64 slot and make it a full-fledged controller, so this is very promising.

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05 Sep 2019 18:33 #144259 by pl7i92
Replied by pl7i92 on topic RockPro64
with the fpga card or a eth you do not need latency at all
it is internal hardware steps that are generated
no software timing involved

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