36 lines
7.3 KiB
Markdown
36 lines
7.3 KiB
Markdown
# tuned-amdgpu
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Hacky solution to integrate AMDGPU power profile control in `tuned` with Ansible
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Takes a list of existing `tuned` profiles and creates new ones based on them. These new profiles include AMDGPU power/clock parameters
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_Warning_: Only tested with RX6000 series GPUs, it is probable that older AMD GPUs will not work properly. Use at your own risk!
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## Profiles
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An example of the output/provided profiles follow
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| Output profile | Description |
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|:---|---|
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| `balanced-amdgpu-default` | Includes the (assumed) existing `balanced` tuned profile.<br/><br/>Only adjusts the GPU power limit (typically lower). Clocks/voltage curve remain the default. |
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| `desktop-amdgpu-VR` | Includes the (assumed) existing `desktop` tuned profile.<br/><br/>Adjusts the GPU power limit, clocks, _and_ the voltage curve.<br/><br/>Uses the predefined `VR` profile in the driver. See `/sys/class/drm/card*/device/pp_power_profile_mode` |
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| `latency-performance-amdgpu-custom` | Includes the existing `latency-performance` tuned profile.<br/><br/>Like the existing GPU profiles (eg: _VR)), this also adjusts the GPU power limit, clocks, _and_ the voltage curve.<br/><br/>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](https://docs.kernel.org/gpu/amdgpu/thermal.html#pp-dpm) |
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**Note**: This is non-exhaustive, see the variables `base_profiles` and `amdgpu_profiles` below for the (default) sources of the merged profile mapping
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## Notable variables
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These are the variables you're likely to want to change. They are defined in [playbook.yml](playbook.yml)
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| Variable | Description | Default |
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|------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| power_max_default_multi| Must be a float.<br/><br/>Sets the AMD GPU power limit for the newly-created `amdgpu-default` GPU profiles in `tuned`.<br/><br/>A multiplier against the board power _capability_ | `0.928793` or ~`93%`, provides roughly 300W from my 323W board capability. |
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| power_max_custom_multi | Same as above but for the non-default `amdgpu` profiles in `tuned`. eg: `...-amdgpu-{VR,custom}` | `0.82` or `82%`, my 6900XT defaults to ~87% -- allowing for slightly less power |
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| gpu_clock_min | Sets the minimum (dynamic) GPU clock for the non-default `amdgpu` profiles | 2000, results in 2Ghz |
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| gpu_clock_max | Sets the maximum (dynamic) GPU clock for the non-default `amdgpu` profiles | 2615, results in 2.62Ghz (rounded) -- mild overclock |
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| 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.<br/><br/>To avoid flickering this does *not* change dynamically with load. | 1075, results in 1.1Ghz (base, rounded) |
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| card | Set the `card#` for the card to use.<br/><br/>For a hint if this needs changed:<br/>`ls -lad /sys/class/drm/card[0-9]*` | `card0` -- assumes the first GPU |
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| 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`) |
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| base_profiles | List of base tuned profiles to clone in the new AMDGPU profiles. Defaults based on `Fedora` | <ul><li>`balanced`</li><li>`desktop`</li><li>`latency-performance`</li><li>`network-latency`</li><li>`network-throughput`</li><li>`powersave`</li><li>`virtual-host`</li>|
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| amdgpu_profiles | Dictionary mapping the AMDGPU power profiles found in `/sys/class/drm/card*/device/pp_power_profile_mode`.<br/><br>Allows adjustment to the automatic power/clock handling in the GPU using either predefined profiles or `custom`<br/><br/>More may be added, only three GPU power profiles are provided -- `default`, `VR`, and `custom`.| <pre>default:<br/> pwrmode: 0<br/>VR:<br/> pwrmode: 4<br/>custom:<br/> pwrmode: 6</pre>|
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