Cgminer 3.7.2 patch - Add powertune to API

I made this small patch for CGMiner to add the "--gpu-powertune" option to the API, called via the "gpupow" command.

The "gpupow" command takes the same command format as "gpuengine", "gpumem" etc, so a string with 2 parameters "0,20" for GPU0, Powertune 20.

I made this as we have Night/Day power rates so the mining cards run at full overclock over night, then in the morning they are switched via a cronjob to low clock/power usage. Previously I could down the clocks but not set the power tune. Some cards like my R9 290s do not like running at 0 Powertune so they need to be at 3 on stock clocks, where as my R9 270s run great at -10 powertune at stock.

PATCH: https://mega.co.nz/#!FIY0DIaA!QO96qhkQu0VsKaqcHvmA5GXcy8Fs8kFUGy6nnD1ufBs
To Apply:

Code:

cd cgminer-3.7.2
patch -p1 < cgminer-3.7.2-api.patch
make
sudo make install

EXAMPLE: Using pycgminer (https://github.com/tsileo/pycgminer)
Snippet from my Cron script for the R9 270...

Code:

#!/usr/bin/python
import sys
from pycgminer import CgminerAPI

def main():
        cgminer = CgminerAPI()

        if sys.argv[1] == "day": 
                # day settings
                cgminer.host='localhost'
                cgminer.gpuengine("0,945")
                cgminer.gpumem("0,1400")
                cgminer.gpupow("0,-10")
        elif sys.argv[1] == "night":
                # night settings 
                cgminer.host='localhost'
                cgminer.gpuengine("0,1050")
                cgminer.gpumem("0,1500")
                cgminer.gpupow("0,10")

if __name__ == "__main__":
            main()

From my crontab...

Code:

0 23 * * * /home/derp/bin/cg-api.py night
0 7 * * * /home/derp/bin/cg-api.py day

End result, I use about 200W less power during the day at a cost of around 200kh/s, and gain those at night where power is half the cost.

Hope this helps someone Cheesy