If you look at the rr issue, there is plenty of interest from the rr maintainers (of whom I am one), and also some engagement from AMD. The problem is there is

If you look at the rr issue, there is plenty of interest from the rr maintainers (of whom I am one), and also some engagement from AMD. The problem is there is a deep bug in AMD's performance counters or their kernel PMU driver, it's really hard to figure out, and the AMD staff best placed to figure it out are (I assume) really busy.