[Enhancement] GPU performance metrics
GPU performance metrics would be very useful for benchmark and identifying bottlenecks (especially when developing NVK because it still has various peformance blockers)
The metrics I would like to see are memory clock, memory usage (maybe per-app?), GPU clock, GPU utilization/busy percent, fan speed and GPU power draw (GPU temperature metrics already exist but there's #335 to deal with and individual engine utilization for things like video acceleration could be implemented as part of that feature); hopefully I didn't miss anything important in my list
They should be exposed through hwmon for temperature/power/fan speed (and non-debug sysfs nodes (fdinfo could be an option too?) for the rest on top of the mentioned hwmon features of course) so no graphics API-specific features (I already saw that mistake with memory usage metric)
Implementing this feature will likely require some RE work (or carefully looking at the OGK source code for the GSP path)