PowerMizer options are ignored

[luiscastro193]

All PowerMizer options seem to be ignored by the driver. Apparently this is a known issue: https://forums.developer.nvidia.com/t/kernel-module-option-nvreg-registrydwords-for-powermizerenable-doesnt-work-on-530-41-03/247610

Do you know how to force max performance with the battery as well? Essentially what _override_max_perf=2 should do. nvidia-smi shows P0 with AC, P3 with the battery and P5 on "low" battery. I would like at least P3 always. Preferably P0 always.

[ventureoo]

All PowerMizer options seem to be ignored by the driver. Apparently this is a known issue: https://forums.developer.nvidia.com/t/kernel-module-option-nvreg-registrydwords-for-powermizerenable-doesnt-work-on-530-41-03/247610

Yep, that's sad. I need to update information in the README in that case.

Do you know how to force max performance with the battery as well? Essentially what _override_max_perf=2 should do. nvidia-smi shows P0 with AC, P3 with the battery and P5 on "low" battery. I would like at least P3 always. Preferably P0 always.

You can use nvidia-smi with its --lock-gpu-clocks and --lock-memory-clocks options respectively along with the udev rules. E. g:

# Sets max memory and GPU clocks frequency for my 3050 Mobile
sudo nvidia-smi -lmc 5500,5500
sudo nvidia-smi -lgc 1747,1747

As I said, you can use udev conditions to automatically adjust depending on battery power or AC power supply:

# Rule for when switching to battery
ACTION=="change", SUBSYSTEM=="power_supply", ATTR{name}=="BAT0", RUN+="/usr/bin/nvidia-smi  -lmc min,max", RUN+="/usr/bin/nvidia-smi -lgc min,max"
# Rule for when switching to AC
ACTION=="change", SUBSYSTEM=="power_supply", ATTR{name}=="AC0", RUN+="/usr/bin/nvidia-smi  -lmc min,max", RUN+="/usr/bin/nvidia-smi -lgc min,max"
# Rule for when switching to battery + low battery charge (less than 5%)
ACTION=="change", SUBSYSTEM=="power_supply", ATTR{status}=="Discharging", ATTR{capacity}=="[0-5]", RUN+="/usr/bin/nvidia-smi -lmc min,max", RUN+="/usr/bin/nvidia-smi -lgc min,max"

Please note that the -lgc and -lmc options only work for Volta+ (Turing and above). You can get the possible frequencies via nvidia-smi -q -d SUPPORTED_CLOCKS

[luiscastro193]

Power limit seems to be the main bottleneck, even if you set lock-gpu-clocks for example. It's so sad there isn't a simple option to set everything anymore. Please let me know if someone finds something.

[ryanmusante]

$ sudo nvidia-smi -pl 80

[sudo] password for ryan: 
Changing power management limit is not supported for GPU: 00000000:01:00.0.
Treating as warning and moving on.
All done.

$ \cat /etc/modprobe.d/modprobe.conf | grep -i RegistryDwords

options nvidia NVreg_RegistryDwords="OverrideMaxPerf=0x1" 
options nvidia NVreg_RegistryDwords="PowerMizerDefault=0x1" 
options nvidia NVreg_RegistryDwords="PowerMizerDefaultAC=0x1" 
options nvidia NVreg_RegistryDwords="PowerMizerEnable=0x1" 
options nvidia NVreg_RegistryDwords="PerfLevelSrc=0x2222"

$ \cat /etc/systemd/system/system-startup.sh

#!/bin/bash
nvidia-smi -pm 1
#nvidia-smi -i 0 -pl 80
nvidia-smi -i 0 -lmc 6000,6000
nvidia-smi -i 0 -lgc 1710,1710

I'm not able to set power limits on my mobile gpu.
I assume these are useless entries in my modprobe for now.
However, pushing clocks works fine.

Manjaro/6.7.7/Gnome/11th gen Intel/RTX3080 mobile

[ventureoo]

There was a partial solution to increase TDP, on laptops with Ampere and above you need to enable the nvidia-powerd service:

sudo systemctl enable --now nvidia-powerd

In my case on a 3050 Mobile this raises the TDP limit from 35W to 40W, which in turn gives a gain of about ~10 FPS in Furmark without significant temperature changes.

Without nvidia-powerd

With nvidia-powerd