On Thu, Jul 08, 2021, Matthias Klein wrote:

I am trying to get the PREEMPT_RT patch to run on a Ka-Ro TX6U-8033
module (800MHz i.MX6U7).

The kernel boots and basically works. But I have measurements with
cyclictest with maximum latency of up to 2..3 milliseconds with only
100000 runs.

Was this an official v5.10 -rt release? If so, which?

Please note that applying the preempt_rt patch over NXP's vendor tree is
not supported.

I would like to compare my configuration in a first step with a
working IMX6 configuration which has no such outliers.

Attach your .config and I'll give it a quick PREEMPT_RT sanity check.

thanks,

--
Ahmed S. Darwish
Linutronix GmbH