I wonder why is that, if Rocky is repackaging RHEL source performance should be identical, no?
Article mentions realtime kernel. It seems they were working with RH on custom kernel (that's the support contract he mentioned), but started to be asked to pay for RHEL license to use it, which understandably pisses him off
Would you be mostly guessing for things like build flags and optimizations? Could something as simple as package build order affect performance?
1) I am not sure Rocky were actually re-packaging the RT stuff originally, they've got it now though.
2) RT is pretty finicky to tune correctly for your use case at the best times, and especially for use cases as exacting as the 5G RAN. I assume there is a consulting aspect to this that they are paying the CIQ folks for, but probably based on man hours or a flat fee rather than the per socket/node subscription they might have paid Red Hat.