linamh/sys-power/undervolt/files/linux-phc-optimize.bash
geos_one 90e8adfb27 add undervolt
git-svn-id: https://svn.disconnected-by-peer.at/svn/linamh/trunk/linamh@1543 6952d904-891a-0410-993b-d76249ca496b
2009-09-04 15:13:34 +00:00

180 lines
4.5 KiB
Bash

#!/bin/bash
. /usr/share/undervolt/functions.bash || {
printf "ERROR: Could not load functions.bash\n"
exit 1
}
# http://phc.athousandnights.de/
printf "\n I assume you have linux-phc correctly installed and working.
This script will optimize your voltages at every speed setting by
systematically lowering them while stressing the CPU.
Each voltage will be turned down until your system crashes, and the final
setting for that voltage will be 2 VIDs above that to \"ensure\" stability.
WARNING:
This script will crash your system as many times as there are VIDs to tweak.
You might destroy your hardware, break laws and/or die in vain if you continue.\n\n"
confirm || exit 0
cpufreq=/sys/devices/system/cpu/cpu0/cpufreq
phc_vids=$cpufreq/phc_vids
printf "\n\nWill use current directory to store/retrieve test results.\n"
printf "\nRead phc_default_vids:\n"
cat $cpufreq/phc_default_vids > /dev/null
check || exit 1
def_vids=`cat $cpufreq/phc_default_vids`
if [ -f phc_tweaked_vids ]; then
printf "\nLoad VIDs from 'phc_tweaked_vids'\n"
cur_vids=`cat phc_tweaked_vids`
else
printf "\nRead default VIDs.\n"
cur_vids="$def_vids"
fi
count_phc=`printf "$def_vids" | awk '{print NF}'`
count_tweak=`printf "$cur_vids" | awk '{printf NF}'`
if [ "$count_phc" != "$count_tweak" ]; then
printf "$tcf00> ERROR:$tcRst Wrong VID count!\n"
exit 1
fi
let count_phc--
check || {
printf "$tcf00> ERROR:$tcRst Number of VIDs is zero!\n"
exit 1
}
if [[ -f phc_tweaked_vids && -f phc_cur_pos ]]; then
printf "Load position from 'phc_cur_pos'\n"
cur_pos=`cat phc_cur_pos`
let ++cur_pos
check || exit 1
else
printf "Reset position to 0.\n"
cur_pos=0
fi
printf "Read available frequencies.\n"
freqs=`cat $cpufreq/scaling_available_frequencies`
c=0
for i in $freqs; do
let c++
freq[c]=$i
done
if [ "$c" != "$count_tweak" ]; then
printf "$tcf00> ERROR:$tcRst Number of frequencies ($c) and VIDs ($count_tweak) do not match!\n"
exit 1
fi
check
#printf "$cur_vids" | awk '{for (i=1; i<=NF; i++) print $i}'
c=0
for i in $cur_vids; do
let c++
vid[c]=$i
if [ "$c" -lt "$cur_pos" ]; then
vids_done="$vids_done$i "
fi
if [ "$c" = "$cur_pos" ]; then
printf "\nLast VID: $i\n"
let vid[c]+=2
if [ "${vid[$c]}" -gt "${vid[$(( $c - 1 ))]}" ]; then
printf "Replace with VID from previous position.\n"
let vid[c]=vid[c-1]
else
printf "Increase by +2\n"
fi
vid_last="${vid[c]} "
fi
if [ "$(( c - 1 ))" = "$cur_pos" ]; then
vid_next="$i"
else if [ "$c" -gt "$cur_pos" ]; then
vids_rem="$vids_rem $i"
fi
fi
done
printf "\nDefault VIDs: $def_vids
Current VIDs: $tc0f0$vids_done$tcf00$vid_last$tcff0$vid_next$tcRst$vids_rem\n"
printf "$vids_done$vid_last$vid_next$vids_rem" > phc_tweaked_vids
printf "$cur_pos" > phc_cur_pos
if [ "$cur_pos" -gt "$count_phc" ]; then
printf "\nAll VIDs have been tweaked!
Results are in the file 'phc_tweaked_vids' - use with care.\n"
printf "\nAll done! - Have a nice day.\n"
exit 0
fi
if [ "x$vid_last" != "x" ]; then
if [ "$vid_next" -gt "${vid[$cur_pos]}" ]; then
printf "\nNext VID higher than last - copying."
vid[$(( cur_pos + 1 ))]=${vid[$cur_pos]}
fi
fi
let ++cur_pos
printf "\nSwitch to 'userspace' scaling governor.\n"
printf "userspace" | tee $cpufreq/scaling_governor > /dev/null
check || exit 1
printf "Set frequency to ${freq[$cur_pos]}.\n"
printf "${freq[$cur_pos]}" | tee $cpufreq/scaling_setspeed > /dev/null
check || exit 1
printf "Run burnMMX.\n"
grep [b]urnMMX > /dev/null && printf "...already running.\n" || burnMMX &
printf " PID: $!\n"
recover () {
printf "\n\nRecovering CPU.\n"
printf "$vids_done$vid_last$((${vid[$cur_pos]} + 2))$vids_rem" | tee $cpufreq/phc_vids > /dev/null
printf "ondemand" | tee $cpufreq/scaling_governor > /dev/null
pkill burnMMX
printf "\nRun this script again to continue the optimization.\n"
}
printf "\n-----\nStart testing.\n"
confirm || {
recover
exit 1
}
while [[ 1 ]]; do
let vid[cur_pos]--
printf "\nDefault VIDs: $def_vids
Current VIDs: $tc0f0$vids_done$tc0f0$vid_last$tcf00${vid[$cur_pos]}$tcRst$vids_rem
Testing VID: ${vid[$cur_pos]} ($(( ${vid[$cur_pos]} * 16 + 700)) mV)\n"
printf "$vids_done$vid_last${vid[$cur_pos]}$vids_rem" > phc_tweaked_vids
sync
if [ "${vid[$cur_pos]}" -lt "0" ]; then
printf "\n\nThe lowest acceptable VID is 0."
recover
exit 0
fi
printf "$vids_done$vid_last${vid[$cur_pos]}$vids_rem" | tee $cpufreq/phc_vids > /dev/null
c=0
while [ "$c" -lt "30" ]; do
ps aux | grep [b]urnMMX > /dev/null || {
printf "\nburnMMX crashed!"
recover
exit 0
}
printf "."
sleep 0.5
let c++
done
done