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422 | #!/bin/bash
# Script downloaded from http://www.openmindedbrain.info
#
# http://www.linux-phc.org/
# #
# Below just some useful functions #
# #
# Text Colors:
esc="\033["
tc000="${esc}30m"
tcf00="${esc}31m"
tc0f0="${esc}32m"
tcff0="${esc}33m"
tc00f="${esc}34m"
tcf0f="${esc}35m"
tc0ff="${esc}36m"
tcfff="${esc}37m"
tcRst="${esc}0m"
# Background Colors:
bc000="${esc}40m"
bcf00="${esc}41m"
bc0f0="${esc}42m"
bcff0="${esc}43m"
bc00f="${esc}44m"
bcf0f="${esc}45m"
bc0ff="${esc}46m"
bcfff="${esc}47m"
check () {
s=$?
if [ "$s" = "0" ]; then
printf "$tc0f0> Success!$tcRst\n"
else
printf "$tcf00> PhaiL!!!$tcRst\n$tcff0> Smash your head on keyboard to continue.$tcRst\n"
read -n 1 -s > /dev/null
fi
return $s
}
silent_check () {
s=$?
return $s
}
confirm () {
loop=1
while [ "$loop" = "1" ]; do
printf "Do you want to continue? [Y/n/?] "
read -n 1 -s answer
case "$answer" in
"Y" | "y" | "" )
printf "${tc0f0}Yes$tcRst\n"
loop=0
return 0
;;
"?" )
printf "${tc00f}?$tcRst\nIt's really just a ${tc0f0}Yes$tcRst or ${tcf00}No$tcRst >:-[\n"
;;
"N" | "n" )
printf "${tcf00}No$tcRst\n"
loop=0
return 1
;;
* )
printf "${tcff0}$answer$tcRst\n"
;;
esac
done
}
confirm_section () {
confirm || {
printf "$tc00f> Skipping entire section.$tcRst\n"
exit 1
}
}
backup () {
printf "Creating backup ${file}~\n"
sudo cp -a "$file" "${file}~"
check
return $?
}
file_check () {
s=0
if [[ "$create" && ! -f "$file" ]]; then
create=
printf " Create $file\n"
printf "$content" | sudo tee "$file"
check || return $?
s=1
fi
if [[ "$owner" && "`stat -c %U:%G \"$file\"`" != "$owner" ]]; then
printf " Change ownsership of $file\n"
sudo chown "$owner" "$file"
check || return $?
s=1
fi
if [[ "$perm" && "`stat -c %a \"$file\"`" != "$perm" ]]; then
printf " Change permissions of $file\n"
sudo chmod "$perm" "$file"
check || return $?
s=1
fi
if [ "$s" = "0" ]; then
printf "${tc00f}> SKIPPED:$tcRst Already applied\n"
fi
return 0
}
pattern_count () {
awk "/$pattern/{n++}; END {print n+0}" "$file"
}
line_count () {
awk "/$line/{n++}; END {print n+0}" "$file"
}
pattern_confirm () {
if [ ! -f "$file" ]; then
printf "${tcff0}> WARNING:$tcRst Could not find $file\n"
return 1
fi
if [[ ( "$pattern" && "`pattern_count`" -gt "0" ) || ( ! "$pattern" && "`line_count`" = "0" ) ]]; then
printf "${tc00f}> SKIPPED:$tcRst Already applied\n"
return 1
fi
return 0
}
append () {
printf "Appending to $file\n"
printf "$append" | sudo tee -a "$file" > /dev/null
check
return $?
}
replace () {
printf "Scanning $file\n"
result="`awk \"/$line/{sub(/$search/, \\\"$replace\\\")}; {print}\" \"${file}\"`"
check && {
printf "Writing $file\n"
printf "$result" | sudo tee "$file" > /dev/null
}
check
return $?
}
confirm_append () {
pattern_confirm && confirm && append
return $?
}
confirm_replace () {
pattern_confirm && confirm && replace
return $?
}
install_confirm () {
printf "\nInstall: $tc0f0$pkgs$tcRst\n"
dpkg -l $pkgs > /dev/null 2>&1 && {
dpkg -l $pkgs | grep -q "^[pu]" || {
printf "${tc00f}> SKIPPED:$tcRst Already installed\n"
return 0
}
}
confirm && sudo aptitude --without-recommends install $pkgs
return $?
}
purge_confirm () {
printf "\nUninstall (purge): $tcf00$pkgs$tcRst\n"
dpkg -l $pkgs 2> /dev/null | grep -q "^i" > /dev/null || {
printf "${tc00f}> SKIPPED:$tcRst None installed\n"
return 0
}
confirm && sudo aptitude --without-recommends purge $pkgs
return $?
}
# #
# End of the useful functions #
# #
# #
# #
# #
# Below the actual code #
# #
# #
# #
above_vids=4
burn_wait=93
printf "\n
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 $tc0f0$above_vids$tcRst VIDs above that to \"ensure\" stability.
WARNING:
This script will crash your system as many times as there are VIDs to tweak.
You might destroy your hardware, break laws and/or die in vain if you continue.\n\n"
confirm || exit 0
num_cpus=0
cpu0freq=/sys/devices/system/cpu/cpu0/cpufreq
cpusfreq=""
while [ [1] ]; do
cat /sys/devices/system/cpu/cpu$num_cpus/cpufreq/phc_default_vids > /dev/null 2>&1
silent_check || break
cpusfreq+="/sys/devices/system/cpu/cpu$num_cpus/cpufreq "
let num_cpus++
done
if [ $num_cpus = 0 ]; then
printf "$tcf00> ERROR:$tcRst No CPU core capable of undervolting found.\n"
exit 1
fi
printf "$tc0f0>Found $num_cpus CPU cores.$tcRst\n"
if [ $num_cpus -gt 1 ]; then
printf "Multiple cores found, the script will use the
same voltages for all cores, this means final
setting will be $tc0f0$above_vids$tcRst VIDs above the weakest core.\n"
fi
printf "\nInstall required packages.\nWill use burnMMX (part of cpuburn package) to stress CPU."
pkgs="cpuburn" # cpufrequtils
install_confirm
def_vids=`cat $cpu0freq/phc_default_vids`
c=0
for i in $def_vids; do
let c++
def_vids_arr[c]=$i
done
if [ -f phc_tweaked_vids ]; then
printf "\nLoad VIDs from 'phc_tweaked_vids' file\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 $cpu0freq/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: $i\n"
if [ "${vid[$c]}" -eq 0 -a $c -eq 1 ]; then
printf "I don't trust the CPU can work with the first VID at 0.\nI'm ignoring it and replace it with the default VID.\n"
let vid[c]=$def_vids
vid_last="${vid[c]} "
else
let tmp="${vid[c]}"+$above_vids
if [ $tmp -gt "${def_vids_arr[$c]}" ]; then
let more="${def_vids_arr[$c]}"-"${vid[$c]}"
else
more=$above_vids
fi
let vid[c]+=$more
if [ "${vid[$c]}" -gt "${vid[$(( $c - 1 ))]}" ]; then
printf "Replace with VID from previous position.\n"
let vid[c]=vid[c-1]
else
printf "Increase by +$more\n"
fi
vid_last="${vid[c]} "
fi
fi
if [ "$(( 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"
for i in $cpusfreq; do
printf "userspace" | sudo tee $i/scaling_governor > /dev/null
done
check || exit 1
printf "Set frequency to ${freq[$cur_pos]}.\n"
for i in $cpusfreq; do
printf "${freq[$cur_pos]}" | sudo tee $i/scaling_setspeed > /dev/null
done
check || exit 1
printf "Run burnMMX.\n"
pkill burnMMX
for i in $cpusfreq; do
burnMMX &
printf " PID: $!\n"
done
recover () {
printf "\n\nRecovering CPU.\n"
pkill burnMMX
for i in $cpusfreq; do
printf "$def_vids" | sudo tee $i/phc_vids > /dev/null
printf "ondemand" | sudo tee $i/scaling_governor > /dev/null
done
printf "\nRun this script again to continue the optimization.\n"
}
printf "\n-----\nStart testing.\n"
confirm || {
recover
exit 1
}
while [[ 1 ]]; do
let vid[cur_pos]--
if [ "${vid[$cur_pos]}" -lt "0" ]; then
printf "\n\nThe lowest acceptable VID is 0."
recover
exit 0
fi
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
for i in $cpusfreq; do
printf "$vids_done$vid_last${vid[$cur_pos]}$vids_rem" | sudo tee $i/phc_vids > /dev/null
done
c=0
while [ $c -lt $burn_wait ]; do
burnMMX_instances=`ps aux | grep [b]urnMMX | wc -l`
if [ $burnMMX_instances -ne $num_cpus ]; then
printf "\nburnMMX instances different than the CPU cores number. (Maybe one crashed)!"
recover
exit 0
else
printf "."
if [ $c -eq 30 -o $c -eq 61 ]; then
printf "\n"
fi
sleep 0.5
let c++
fi
done
done
|