i.MX8 CPU to 100%

[wimdewitte]

I'm evaluating elinux on an i.MX8 board, using wayland; with latest yocto of NXP. App (= default test_app or from flutter/samples) is working, startup time is ok; if the app is running without being used, the CPU usage is negligible. But from the moment a button is clicked; CPU usage for the flutter app increases to 100% for some seconds. This make the app worthless and doesn't reflect the idea that flutter is lightweight. I don't think the problem is related to graphical subsystem or whatever, but more like a process while loop running too fast. Is anyone else experiencing the same problem on i.MX8?

[HidenoriMatsubayashi]

Are you using release build? Does CPU usage 100% mean per All CPU cores? or Just 1 core? Also please ensure GPU H/W driver is enabled on your device.

[wimdewitte]

yes, release build, gpu enabled, load is on all cores

[HidenoriMatsubayashi]

Specifically, what i.mx8 series are you using? I haven't heard flutter utilization is so high. Can you share real logs like top command logs?

[HidenoriMatsubayashi]

This is an example using flutter on i.MX8M board. https://www.sequality.at/blog/2023/techtalk-flutter-on-embedded-linux/

[HidenoriMatsubayashi]

Closing. Thank you.