lttng-ust | official lttng-ust git | Monitoring library

From the uname -a output I can see that you are running a PREEMPT RT Linux kernel as you probably know because your hostname is realtimepi.

When you are running a kernel that was not packaged by your distribution you can't simply install the lttng-modules kernel modules as the Linux kernel header files installed on your machine would not match the ones expected by the modules package.

To use the lttng-modules, you will need to compile them from source. Have a look at the documentation on that subject: https://lttng.org/docs/v2.10/#doc-building-from-source. In your case, i believe you only need to build the modules from source.

Make sure you uninstall the lttng-modules-dkms package and then restart the lttng-sessiond process before trying again.

You have 2 possibilities to fix the problem, given that you have only one attribute with data:

1- Change the to and keep the rest

or

2- Keep your entry and change the display element to

A display of type constant means it tries to read an attribute of that name under the main path, so here, it was trying to read "Dummy/Value/Value", which doesn't exist

EDIT: Here's a working example of the view part for your analysis:

According this issue .net core does not have a default script to execute, so you need to define one yourself in your .travis.yml.

Another example available in https://andrewlock.net/adding-travis-ci-to-a-net-core-app/.