Error measing non-rt kernel latency.

[Madeline Twetten]

Here is the following issue I am having. I have tried a couple of fixes but these throw the same error.

I have copied below exactly what I am doing.

debian@beaglebone:/var/lib/cloud9/BeagleBoard-exercises/linux/kernel/rt$ time sudo ./hist.gen > nort.hist

Unable to change scheduling policy!

Probably missing capabilities, either run as root or increase RLIMIT_RTPRIO limits.

real    0m0.128s

user    0m0.008s

sys     0m0.060s

debian@beaglebone:/var/lib/cloud9/BeagleBoard-exercises/linux/kernel/rt$ ./setup.sh

950000

950000

debian@beaglebone:/var/lib/cloud9/BeagleBoard-exercises/linux/kernel/rt$ time sudo ./hist.gen > nort.hist

Unable to change scheduling policy!

Probably missing capabilities, either run as root or increase RLIMIT_RTPRIO limits.

real    0m0.114s

user    0m0.014s

sys     0m0.051s

debian@beaglebone:/var/lib/cloud9/BeagleBoard-exercises/linux/kernel/rt$ sudo bash

root@beaglebone:/var/lib/cloud9/BeagleBoard-exercises/linux/kernel/rt# ulimit -r unlimited

root@beaglebone:/var/lib/cloud9/BeagleBoard-exercises/linux/kernel/rt# ./hist.gen > nort.hist

Unable to change scheduling policy!

Probably missing capabilities, either run as root or increase RLIMIT_RTPRIO limits.

[shabaz]

Hi!

Not near a BBB to check, but I think the answer is in the debug in you message:

Unable to change scheduling policy!

Probably missing capabilities, either run as root or increase RLIMIT_RTPRIO limits.

you probably need to run as root.

[Robert Nelson]

Check out the FAQ here for that example

https://elinux.org/EBC_Exercise_36_PREEMPT_RT

Regards,

--
Robert Nelson
https://rcn-ee.com/