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readme: misc

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Josh Lay 2024-08-27 07:59:53 -05:00
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@ -4,13 +4,13 @@ Hacky solution to integrate AMDGPU power/clock control into `tuned` profiles
with Ansible.
Extends every `tuned` profile found in `/usr/lib/tuned`
using the [AMDGPU hwmon interfaces](https://docs.kernel.org/gpu/amdgpu/thermal.html):
with [AMDGPU hwmon interfaces](https://docs.kernel.org/gpu/amdgpu/thermal.html) in three variations:
- `default`: the out-of-the-box GPU clock/power configuration
- `overclock`: the _optimized_ card configuration. Includes the clock/voltage/power settings outlined below.
- `peak`: the same as `overclock`, but with clock gating removed. May help profiling.
Contrary to the name, the `overclock` profiles can be used to de-tune the card as well.
Contrary to the name, the resulting `overclock` profile may also be used to _under-{volt,clock}_.
## Assumptions / Limitations
@ -23,6 +23,33 @@ assumes a single GPU with displays attached.
Please report any issues or PRs, all will be considered.
## Config
```ini
; file: /etc/tuned/amdgpu-profile-vars.conf
tuned_amdgpu_clock_min=500
tuned_amdgpu_clock_max=2715
tuned_amdgpu_memclock_static=1075
tuned_amdgpu_power_multi_def=0.869969040247678
tuned_amdgpu_power_multi_oc=1.0
tuned_amdgpu_mv_offset=+60
```
_(rendered example)_
These represent the [Variables below](#Variables); changes outside of _Ansible_
are not immediately effective, requiring switching profiles or restarting the service.
The `gamemode` service offers dynamic switching. Please see this [Arch Wiki](https://wiki.archlinux.org/title/Gamemode) document
for more information on `gamemode`. Example:
```ini
; ~/.config/gamemode.ini snippet
[custom]
start=tuned-adm profile latency-performance-amdgpu-overclock
end=tuned-adm profile latency-performance-amdgpu-default
```
## Profiles
Two _'profiles'_ are in each name:
@ -36,32 +63,6 @@ Two _'profiles'_ are in each name:
| `desktop-amdgpu-overclock` | Includes the (assumed) existing `desktop` tuned profile.<br/><br/>Adjusts the GPU power limit, clocks, _and_ the voltage curve. |
| `desktop-amdgpu-peak` | Includes the (assumed) existing `desktop` tuned profile.<br/><br/>Same as the `overclock` profile, but locks clocks to their highest configured values |
## Config
Preview:
```ini
; file: /etc/tuned/amdgpu-profile-vars.conf
tuned_amdgpu_clock_min=500
tuned_amdgpu_clock_max=2715
tuned_amdgpu_memclock_static=1075
tuned_amdgpu_power_multi_def=0.869969040247678
tuned_amdgpu_power_multi_oc=1.0
tuned_amdgpu_mv_offset=+60
```
These represent the [Variables below](#Variables); changes outside of _Ansible_ are not immediately effective.
These require switching profiles or restarting the `tuned` service.
The `gamemode` service offers dynamic switching, example:
```ini
; ~/.config/gamemode.ini snippet
[custom]
start=tuned-adm profile latency-performance-amdgpu-overclock
end=tuned-adm profile latency-performance-amdgpu-default
```
Please see this [Arch Wiki](https://wiki.archlinux.org/title/Gamemode) link for more information.
## Variables