Potential All-in-One Single Board Computers

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3 years 9 months ago - 3 years 9 months ago #263006 by royka
The kernel did compile, there is probably a lot to improve with the settings but after running the test for about 30min, few glxgears open and youtube and 5 tabs in chromium it had a max jitter of 100us,
The setting: OPI5 on Armbian with RT kernel patch, Wayland, clock timer @1000Hz but that with isolcpus didn't work, had to set boot args: isolcpus=4-7 nohz=on nohz_full=4-7
I don't have tried anything else yet. For now I've some other things to do, when I get better results I'll start a new thread.

Update: I was being stupid, realized that the kernel cache was getting cleaned, thought that I told not to do... so that means this result was without patches and only the boot flags isolcpus and nohz did something. With the kernel patched it won't compile yet
Last edit: 3 years 9 months ago by royka. Reason: Mistake

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3 years 9 months ago #263022 by Bari
I kicked off a new thread to discuss the Opi5 here:
forum.linuxcnc.org/18-computer/48079-can...nfigured-to-run-lcnc
The following user(s) said Thank You: royka, CarterKraft

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3 years 9 months ago #263249 by zack

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3 years 8 months ago #263865 by Bari
Finally found some u-boot source for the RK3588

wiki.radxa.com/Rock5/dev/Debian

The Radxa Rock5 is similar to the Opi5. They both use the Rockchip RK3588.

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3 years 8 months ago #264846 by Bari

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3 years 8 months ago #264853 by rodw

ODROID-N2+ with 4GByte RAM - $83.00 in stock Feb '23
www.hardkernel.com/shop/odroid-n2-with-4gbyte-ram-2/
 
I'm playing with an N2+. One of the Armbian Real time experts is guiding me. I built and installed the PREEMPT_RT 6.2 rc3 kernel yesterday and it worked. I have not been able to measure latency yet. Linuxcnc from the Bookworm repos failed so next step is to build  Linuxcnc.  Hes keen to get me onto Xenomai 4 which will be interesting... If I can convince Linuxcnc to recognise it. I also played around with ChatGPT who wrote out some quite plasusible timer interrupt code for hardware stepping. Some help might be needed when I get to that!

 
The following user(s) said Thank You: tivoi

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