tuned-amdgpu

Hacky solution to integrate AMDGPU power control and overclocking in tuned with Ansible

Takes a list of existing tuned profiles and creates new ones based on them. These new profiles include AMDGPU power/clock parameters

An attempt is made to discover the active GPU using the 'connected' state in the DRM subsystem, example:

~ $ grep -ls ^connected /sys/class/drm/*/status | grep -o card[0-9] | sort | uniq | sort -h | tail -1
card1

Warning: This is only tested with RX6000 series GPUs, it is probable that other generations will not work properly. Use at your own risk!

Profiles

An example of the output/provided profiles follow

Output profile	Description
`balanced-amdgpu-default`	Includes the (assumed) existing `balanced` tuned profile. Only adjusts the GPU power limit (typically lower). Clocks/voltage curve remain the default.
`desktop-amdgpu-overclock`	Includes the (assumed) existing `desktop` tuned profile. Adjusts the GPU power limit, clocks, and the voltage curve.
`desktop-amdgpu-peak`	Includes the (assumed) existing `desktop` tuned profile. Same as the `overclock` profile, but locks clocks to their highest configured values

These are the variables you're likely to want to change. They are defined in playbook.yml

Variable	Description	In-playbook
gpu_clock_min	Sets the minimum (dynamic) GPU clock (in `Mhz`) for the non-default `amdgpu` profiles	`700`
gpu_clock_max	Sets the maximum (dynamic) GPU clock (in `MHz`) for the non-default `amdgpu` profiles	`2600`, results in `2.6GHz` (rounded); mild overclock
gpumem_clock_static	Sets the static memory clock for the GPU (in `MHz`). This is not the effective data rate. That is a multiple of this depending on the type of VRAM. To avoid flickering this does not change dynamically with load.	`1050`, results in just over `1GHz`; mild overclock Actual effective clock depends on this being multiplied against the data/pump rate of the `GDDR?` GPU memory
gpu_mv_offset	GPU core voltage offset. Takes +/- some integer in millivolts. Can be used to both over and under volt.	`-50` (undervolt `50mV` or `0.05V`)
base_profiles	List of base tuned profiles to clone in the new AMDGPU profiles. Defaults based on `Fedora`	`balanced` `desktop` `latency-performance` `network-latency` `network-throughput` `powersave` `virtual-host`
gpu_power_multi	Dictionary with two keys, `default` and `overclock`. Expects two floats to set a power limit relative to the board capability. Example: `1.0` is full board capability, `0.5` is 50%.