The Radeon GPU Profiler (RGP) is a low-level optimization tool for Windows and Linux geared for OpenCL / OpenGL / Vulkan / Direct3D tracing and performance profiling on Radeon GPUs.
Radeon GPU Profiler has obviously been geared for their proprietary/official (closed-source) graphics driver components on both Windows and Linux. Meanwhile last year Mesa's RADV Vulkan driver began adding Radeon GPU Profiler support . That RADV RGP support has been expanded upon with time .
Now today in Mesa 21.0-devel is finally seeing support for RadeonSI with RGP as AMD's official open-source OpenGL driver.
Pierre-Eric Pelloux-Prayer of AMD sent in the merge request recently for implementing basic Radeon GPU Profiler support within RadeonSI. This RGP support is based in part on the RGP/SQTT support added last year to the RADV driver.
The support was merged to Mesa 21.0 as part of this MR ahead of the upcoming Mesa 21.0 feature freeze.