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

Warning: Only tested with RX6000 series GPUs, Navi or older may not work properly.

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

• Power control: (float) multipliers to determine power limits from board power capability
  • power_max_default_multi: Controls power for the generated default GPU profile. Provided: 0.75 for 75% board power capability.
  • power_max_custom_multi: Controls power for the generated custom GPU profile. Provided: 1.0 for 100% board power capability.
• card: Sets the card# to use in the qualified sysfs path /sys/class/drm/{{ card }}/device/pp_power_profile_mode. Default: card0
• gpu_mv_offset: optional, applies offset to GPU voltage, eg: +100 = to boost GPU core voltage 100mV or 0.1V. Can undervolt.
• 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
  • amdgpu_profiles: Dictionary mapping the AMDGPU power profiles found in /sys/class/drm/card*/device/pp_power_profile_mode.
    • Allows adjustment to the automatic power/clock handling in the GPU using either predefined profiles or custom
    • More may be added, only three GPU power profiles are provided:
      • default
      • VR
      • custom
    • May vary by GPU/generation, sample (defaults, below) are from a 6900XT:

amdgpu_profiles:
  default:
    pwrmode: 0
  VR:
    pwrmode: 4
  custom:
    pwrmode: 6