Vega Auto-tuner

Disclaimer: this tool is still in development. Default settings should be safe but if in doubt please read the disclaimer.

A tool to record and fine-tune power and clocks on AMD Radeon RX Vega cards. Useful for undervolting and overclocking your card to its sweet spot or to whatever spot is the sweetest to you.

Install

git clone https://github.com/Benzhaomin/vatu.git
cd vatu
virtualenv3 venv
source venv/bin/activate
pip install -e .

Dev

Install +

pip install -e .[dev]
nosetests
flake8

Config

A default config file is read from (config.default.yaml). Each field can be overriden in a local config.yml file of specified with the -c flag on the command line.

cp vatu/config/

Main settings to look at:

• files: full path to file-like interfaces to the driver
• readonly: set to true to never actually change any setting (true by default)

Usage

$ vatu --help
Usage: vatu [OPTIONS] COMMAND [ARGS]...

  Vega Auto Tuner

Options:
  -v, --verbose
  -c, --config TEXT  load configuration from this file
  --help             Show this message and exit.

Commands:
  autotune  (WIP) try to reach a power, clock or temperature target
  show      show the card's current state

vatu show

Quick monitoring of temperatures, clocks, voltages and Power Play states.

$ watch sudo vatu show

vatu autotune

Start an auto-tuning run, playing with settings and looking at sensors to try to reach a target clock. Settings are printed along the way and reverted back on exit.

$ sudo vatu autotune --help
Usage: vatu autotune [OPTIONS]

Options:
  -d, --duration INTEGER
  -i, --interval INTEGER
  --help                  Show this message and exit.

Auto-tuning

Set a limit and let Vatu try to find the optimal settings for your card.

Actual core clock is a best-effort value that satisfies three things:

• total power limit
• max temperature
• stability

If the card can't reach its target clock without hitting a limit, it will simply clock a bit lower or just jump down a power state.

Overclock example with the default 1200 mV core:

• 1500 Mhz P7 => 1500 Mhz actual
• 1600 Mhz P7 => 1570 Mhz actual
• 1700 Mhz P7 => 1640 Mhz actual or crash

Undervolt example with 1600 Mhz P7:

• 1200 mV => 1570 Mhz actual
• 1150 mV => 1540 Mhz actual
• 1100 mV => 1500 Mhz actual
• 1050 mV => drop to P6

Speedy Tuner

Example of a quick run raising core clock every two second as pstate is stable and we're not hitting any power/temp/clock limits.

$ sudo vatu -c config.yml -v autotune -d 30 -i 2
INFO - Initial state  95% 48C 172.0W / 220W # 1384Mhz@1100mV P5 1400Mhz@1100mV #  945Mhz P3  945Mhz@1050mV
INFO -  80% 48C 171.0W / 220W # 1378Mhz@1100mV P5 1400Mhz@1100mV #  945Mhz P3  945Mhz@1050mV
INFO - core p-level isn't stable, not doing anything this tick
INFO -  92% 48C 174.0W / 220W # 1372Mhz@1100mV P5 1400Mhz@1100mV #  945Mhz P3  945Mhz@1050mV
INFO - core p-level isn't stable, not doing anything this tick
INFO -  98% 46C 175.0W / 220W # 1377Mhz@1100mV P5 1400Mhz@1100mV #  945Mhz P3  945Mhz@1050mV
INFO - p-level stable and high enough, raising core clock to 1405MHz
INFO -  84% 48C 166.0W / 220W # 1372Mhz@1100mV P5 1405Mhz@1100mV #  945Mhz P3  945Mhz@1050mV
INFO - p-level stable and high enough, raising core clock to 1410MHz
INFO - Reached final state  84% 48C 166.0W / 220W # 1382Mhz@1100mV P5 1410MHz@1100mV #  945Mhz P3  945Mhz@1050mV
INFO - Restoring initial state  95% 48C 172.0W / 220W # 1384Mhz@1100mV P5 1400Mhz@1100mV #  945Mhz P3  945Mhz@1050mV

Starving Tuner

(NOT IMPLEMENTED YET)

• I want a 1600 MHz core clock
• try the default 1.2 Vcore, pstate stable and clock delta is ok
• lower vcore by 10mV get a 1590 MHz clock
• ???
• sweet-spot