What were you trying to do that didn't work?

Set the real-time profiles with tuned

Please provide the package NVR for which bug is seen:

Current version of tuned and tuned-realtime-profiles

How reproducible:

Was able to reproduce with the current compose and a previous compose that had the 9.0 -100 kernel (tuned and tuned-realtime-profiles: 2.18.0-1.el9).

Steps to reproduce

1. Setup RHEL 9.0 (confirmed it does not show in 9.2)
2. Install tuned and tuned-profiles-realtime
3. Run sudo systemctl enable tuned --now && sudo tuned-adm profile realtime

Expected results

For the realtime profile to be set

Actual results

Cannot load profile(s) 'realtime': Assertion 'isolated_cores are set' failed will be reported.

Resolution:
change /etc/tuned/realtime-variables.conf by adding a line (thx Clark Williams)

isolated_cores=${f:calc_isolated_cores:1}

Setting severity to major since it is a major component of an rt workflow.
Confirm it was set with tuned-adm profile and seeing the current active profile at the bottom.