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Undefined Runaways during Cyclictest/Latency Measurement RT-Kernel

Question asked by Denis Miehling on Aug 18, 2016

Hello community,

I’m using a T2080 RDB with linux version 4.1.8-rt8 with following kernel options

Processor Support ->  CPU selection -> (X) Freescale e6500

Kernel options --->  Preemption Model (Fully Preemptible Kernel (RT)) --->  (X) Fully Preemptible Kernel (RT)

U-Boot SDK 1.7

QorIQ SDK (FSL Reference Distro) 2.0

Kernel config (below as attachment)

 

I tested the idle(!) system with the cyclictest v1.00 via SSH and had some runaways > 30 μs like you can see in the picture below.

All power saving options like CPU Idle or Dynamic Frequence Skaling(DFS) were disabled of course.

v1.00@pw10_1.png

 

Do you have any ideas guys?

Original Attachment has been moved to: config.txt.zip

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