6.2 KiB
6.2 KiB
tuned-amdgpu
Hacky solution to integrate AMDGPU power profile control 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 older AMD GPUs 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-VR |
Includes the (assumed) existing desktop tuned profile.Adjusts the GPU power limit, clocks, and the voltage curve. Uses the predefined VR profile in the driver. See /sys/class/drm/card*/device/pp_power_profile_mode |
latency-performance-amdgpu-custom |
Includes the existing latency-performance tuned profile.Like the existing GPU profiles (eg: _VR)), this also adjusts the GPU power limit, clocks, and the voltage curve. This differs by using the custom profile in the driver. This opens up further tweaking of the power/clock heuristics through the driver (currently manual). see: pp-dpm |
Note: This is non-exhaustive, see the variables base_profiles and amdgpu_profiles below for the (default) sources of the merged profile mapping
Notable variables
These are the variables you're likely to want to change. They are defined in playbook.yml
| Variable | Description | Default |
|---|---|---|
| gpu_clock_min | Sets the minimum (dynamic) GPU clock for the non-default amdgpu profiles |
2000, results in 2Ghz |
| gpu_clock_max | Sets the maximum (dynamic) GPU clock for the non-default amdgpu profiles |
2615, results in 2.62Ghz (rounded) -- mild overclock |
| gpumem_clock_max | Sets the static memory clock for the GPU. 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. |
1075, results in 1.1Ghz (base, rounded) |
| gpu_mv_offset | GPU core voltage offset. Takes +/- some integer in millivolts. Can be used to both over and under volt. | -25 (undervolt 25mV or 0.025V) |
| base_profiles | List of base tuned profiles to clone in the new AMDGPU profiles. Defaults based on Fedora |
|
| amdgpu_profiles | Dictionary mapping the AMDGPU power profiles found in /sys/class/drm/card*/device/pp_power_profile_mode and custom power limits.For each item, two keys: pwrmode and pwr_cap_multi.pwrmode maps to the number assigned in /sys above.pwr_cap_multi is a multiplier against board power capability. Must be a float, eg: 0.5 for 50% |
default: |