Can the OPI5 be Configured to Run LCNC?

It seems it doesn't downscale the cpu, even at 85C while I was reading that it's it max temp. It was hard to reach that temp with 2 cores isolated in a heated room 20C (rainy Netherlands), had to take off the heatsink and run cpu stress and a few glxgears, still no spikes. I actually don't know if it really will cause issues, especially with a mesa and still a fair low latency.

A good chance that the wifi adapter plays a role, if that's the case you could see if the latest kernel I'd uploaded will help, it has updated usb drivers. Perhaps it does fix the reboot issue too. The power adapter could also be the source. You did disable screen blank too?

btw the heatsink I've got, is not great, but it does something:
aliexpress.com/item/1005005142012365.html

The fan doesn't do much which still is necessary with full cpu use (without the 2 cores isolated) so probably gonna make a bracket for a bigger heat sink.

kanuboy13b wrote:

 I applied the hold and ran a few latency tests, one with youtube playing and one without with 6 glxgears running for at least 1000 seconds. It looks like the preempt rt patch is doing its job as you can see with the screenshots. .

Thats actually quite good. You are only using 200 bins (columns) If you run:
latency-histogram --nobase --sbins 1000

You get rid of the uneeded base thread and with 1000 bins, it wil llook better!

rodw wrote:

Thats actually quite good. You are only using 200 bins (columns) If you run:
latency-histogram --nobase --sbins 1000

I will definitely give this a try, as well as run the test again with an ethernet connection instead of a wifi usb dongle. I will also try ryoka's updated kernel to see if that will resolve anything. Also going to try a different Wifi Dongle, the one's I have are rather old and do not have 5G, and for some reason, my wifi setup at home is really laggy with 2.4Ghz.

Wifi can be a latency killer for sure.

Shame the OPi5 doesn't have Dual Ethernet. One for the Mesa card and one for internet. However, I figure its a non-issue, if I was really concerned with spikes from the wireless I imagine I could just disable wifi during cnc operations

There is a leaked picture of an OPi5 plus, it looks like that one has dual Ethernet. On the github page there are made some preparations for it.
jamesachambers.com/wp-content/uploads/20...3/OrangePi5Plus.webp

Turning WiFi off is an option indeed, you could make a short-key in the keyboard settings for that if it's necessary. The laggy WiFi on the 2.4ghz band could be due to a lot of things of course. Some experiences I've had: DECT phone nearby the router, multi broadcast device like a chromecast/Apple airplay and a router without IGMP Snooping Enabled, different channel could help, when it's busy on all channels instead of 20/40mhz it could help to set it on 20mhz (less noise).