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#!/bin/bash
# Set gpu core freq
# This assumes amdgpu-pro driver. Will not work with fglrx.
# Input: gpu id (index) and new core freq in MHz.
# Example usage: Set gpu core freq to 1000MHz on device 0
# gpu_freq_set 0 1000
# by bobben2
#
# Defaults:
gpu=0
idx=1
cspeed=0 # if 0 then core freq is not set
mspeed=1500
currfreq=0
newfreq=0
mindiff=1000
bestindex=7
if [ "$1" != "" ]; then
gpu=$1
idx=$((gpu+1))
if [ "$2" != "" ]; then
cspeed=$2
fi
mspeed=$3
else
prog=`basename $0`
echo Usage 1: $prog gpuindex newcorefreq will set new freq for gpu at idx
echo Usage 2: $prog gpuindex will return current gpu core freq
exit 0
fi
export devpath=/sys/class/drm/card$gpu/device
if [ -d $devpath ]; then
# ls -l $devpath/pp_*
if [ -f $devpath/pp_dpm_sclk ]; then
while read line
do
set `echo -e "$line"`
echo $1 $2 $3
ind=$1
ind=${ind/%:/} # Remove :
freq=$2
freq=${freq/%Mhz/} # Remove trailing Mhz
freq=${freq/%MHz/}
#echo Freq: $freq
diff=$((cspeed - freq))
diff=${diff/#-/} # Absolute value
if [ $diff -lt $mindiff ]; then
mindiff=$diff
bestindex=$ind
newfreq=$freq
fi
if [ "$3" != "" ]; then
currfreq=$freq
fi
done < $devpath/pp_dpm_sclk
# echo Nearest fit: $bestindex
echo Current freq $currfreq MHz. cspeed: $cspeed
if [ "$cspeed" -ne "0" ]; then
echo "Setting new core freq -> $newfreq MHz"
sudo bash -c "echo manual > $devpath/power_dpm_force_performance_level"
sudo bash -c "echo $bestindex > $devpath/pp_dpm_sclk"
fi
fi
else
echo Could not change core/mem freq for gpu $gpu.
echo "($devpath not found)"
fi