Can the OPI5 be Configured to Run LCNC?

Intrigued by the quite significant latency differences between XFCE and Cinnamon, I did a few more experiments. In summary the Max Jitter with XFCE is around 50 us for both the Servo and Base threads. Under Cinnamon I see around 2 us for the Servo thread and 9 us for the Base thread, which are fantastic results However, under Cinnamon the processors show a very heavy load, depending on graphic activities on the screen. Simply running system monitor full screen and displaying the processor load graphs, shows that the load for most processors is around 90%, while resizing the window results in a equivalent reduction of the processor load. Under XFCE the graphs stay low all the time. To me it sees that Cinnamon has problems handling graphics, which really consumes extreme processor resources. However, it does not affect the excellent latency results......

@angelnu Sorry a bit of a late reply, but in the screenshot you sent, it shows "no_isolcpus" which indicates that you didn't isolate any CPU.
It seems like something went wrong with adding the following line to armbianEnv.txt:
extraargs=isolcpus=5,7

royka wrote:

@angelnu Sorry a bit of a late reply, but in the screenshot you sent, it shows "no_isolcpus" which indicates that you didn't isolate any CPU.
It seems like something went wrong with adding the following line to armbianEnv.txt:
extraargs=isolcpus=5,7
 

I have tried it later with isolcpus 5.7 and I do not get other difference. With the image of kmike: Kenel 5.10.160 RT and ISOLCPUS = 5.7.
 

With the image of armbian kernel 6.8.0-RC1-edge, without real time but with isolcpus = 5.7. Something better in Servo Thread behaves, I have a Orange Pi 5.
 
 

That's strange, maybe you can try this kernel on another image:
drive.google.com/drive/folders/1JglCIPKv...roZcjOvr?usp=sharing

I'm using this kernel with the Debian Bookworm Image from the site of Orange Pi and HW acceleration works, although while watching YouTube videos the latency increases a bit, but not so much as yours for sure.

angelnu wrote:

With the image of armbian kernel 6.8.0-RC1-edge, without real time but with isolcpus = 5.7. Something better in Servo Thread behaves, I have a Orange Pi 5.
 

No, this is much worse than the first picture, see the colored columns on both sides of the graph.
Use --show at the end of the latency-histogram line to show those excursions.

Thanks Royka for the image of the kernel.

I have installed the kernel in Armbian Debian Bookworm, the results are magnificent.