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add undervolt

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git-svn-id: https://svn.disconnected-by-peer.at/svn/linamh/trunk/linamh@1543 6952d904-891a-0410-993b-d76249ca496b
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geos_one 2009-09-04 15:13:34 +00:00
parent d26bd1d18f
commit 90e8adfb27
6 changed files with 513 additions and 0 deletions
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5
sys-power/undervolt/Manifest Normal file
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AUX functions.bash 3234 RMD160 e360fbe368c897677bce7dc656acd434afc032df SHA1 59bcc66163b9717f5a56e12a9c53b9af552ff5f0 SHA256 233ec1f391dabc2def1d2838f450c6ba4a5846d2d7beb92dd5bade21b35dd15b
AUX linux-phc-optimize.bash 4596 RMD160 10bda6d0fe9209b6c0639a2a74ca734a2b6197c8 SHA1 94c281b6218433c331ae19eaace25b6283ab6c47 SHA256 88ee7ba18669960e1497605334ec26748f98360c7c9f6bd05dcc4a1929f2a303
AUX undervolt.confd 1054 RMD160 5dd92c3c45d1192898ef996a85bb1f094b5c7a0b SHA1 b64a650a3dcb1e43de35db3a6902c77cb797eb03 SHA256 a0921aa0471832c4d3d538de00505a6ab93a1794c7c2df48ed027725d5faf81d
AUX undervolt.initd 2808 RMD160 647be5efd98a241023da1eb585fed03fabd2d473 SHA1 9a4c27add2d9dc1ecab2f9be5189084e0376789e SHA256 6fca74f1177db0ccf92889e87401ce3e10cde46e6f15b1151dd2be65b361d5ef
EBUILD undervolt-1.ebuild 726 RMD160 0f10c715c95ef64f4ecc867f1c75fc8439cca08a SHA1 7441fcd7b4ce0838c9276b56fda4674689fa47b7 SHA256 a1a4bba1c40ef8cd9b9ed4173d131152963565eac24779acc7d53c890d5cd9f8

165
sys-power/undervolt/files/functions.bash Normal file
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#!/bin/bash
# This file contains script functions to help modifying files.
# confirm_append Appends to the end of the file
# confirm_replace Locates a line and replaces a substring
#
# The functions are controlled through variables:
# file="/path/to/edited/file"
# pattern="installed" Will skip if pattern matches. Leave empty to disable.
#
# confirm_append:
# append="String to be appended.\n - Here's another line"
#
# confirm_replace:
# line="Line search pattern"
# search="String search pattern"
# replace="Replace matched substring with this"
# 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 $s
}
confirm () {
loop=1
while [ "$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 ${file}~\n"
cp -a "$file" "${file}~"
check
return $?
}
file_check () {
s=0
if [[ "$create" && ! -f "$file" ]]; then
create=
printf " Create $file\n"
printf "$content" | tee "$file"
check || return $?
s=1
fi
if [[ "$owner" && "`stat -c %U:%G \"$file\"`" != "$owner" ]]; then
printf " Change ownsership of $file\n"
chown "$owner" "$file"
check || return $?
s=1
fi
if [[ "$perm" && "`stat -c %a \"$file\"`" != "$perm" ]]; then
printf " Change permissions of $file\n"
chmod "$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" | 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" | tee "$file" > /dev/null
}
check
return $?
}
confirm_append () {
pattern_confirm && confirm && append
return $?
}
confirm_replace () {
pattern_confirm && confirm && replace
return $?
}

179
sys-power/undervolt/files/linux-phc-optimize.bash Normal file
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#!/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

22
sys-power/undervolt/files/undervolt.confd Normal file
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# Path to the voltage table sysfs interface file
# The init script will detect which one of the 2 below file exists and use the correspond table
VTABLE_PATH_0_2_X="/sys/devices/system/cpu/cpu0/cpufreq/op_points_table"
VTABLE_PATH_0_3_X="/sys/devices/system/cpu/cpu0/cpufreq/phc_controls"
# Switch back to DEFAULT_VTABLE if undervoltage is stopped? [yes/no]
SWITCH_BACK="no"
# Default voltages that will be restored at shutdown if SWITCH_BACK=yes
# Linux PHC 0.2.x uses a table of Frequency:Voltage pairs
# Linux PHC 0.3.x uses a table of FID:VID pairs
#DEFAULT_VTABLE_0_2_X="798000:988,1064000:1116,1330000:1244,1596000:1356"
#DEFAULT_VTABLE_0_3_X="12:16 10:10 8:4 6:0"
# Custom voltages that will be applied at boot time
#CUSTOM_VTABLE_0_2_X="600000:700,800000:764,1000000:860,12000000:956"
#CUSTOM_VTABLE_0_3_X="12:16 10:10 8:4 6:0"
# Set the following to "yes" when the all the settings are configured
# This is a safety to disable setting the voltages with the default
# values of this file that are probably wrong for your CPU
IS_CONFIGURED="no"

113
sys-power/undervolt/files/undervolt.initd Normal file
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#!/sbin/runscript
# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $
CUSTOM_VTABLE=" "
DEFAULT_VTABLE=" "
VTABLE_PATH=" "
depend()
{
need localmount
need logger
}
do_error()
{
# Display an error
# $1: Error message
eerror $1
eerror "see http://gentoo-wiki.com/HOWTO_Undervolt_a_Pentium_M_CPU for further information"
eend 1
}
sysfs_check()
{
# Check that the sysfs interface exists
if [ -e ${VTABLE_PATH_0_3_X} ]; then
VTABLE_PATH="${VTABLE_PATH_0_3_X}"
CUSTOM_VTABLE="${CUSTOM_VTABLE_0_3_X}"
DEFAULT_VTABLE="${DEFAULT_VTABLE_0_3_X}"
return 0
else
if [ -e ${VTABLE_PATH_0_2_X} ]; then
VTABLE_PATH="${VTABLE_PATH_0_2_X}"
CUSTOM_VTABLE="${CUSTOM_VTABLE_0_2_X}"
DEFAULT_VTABLE="${DEFAULT_VTABLE_0_2_X}"
return 0
else
logger "Undervolt: SysFs table not found. Can't modify CPU voltages."
eerror "SysFs voltage_table not found. Can't modify CPU voltage table."
eerror "It seems that the undervolting patch has not been applied to the kernel"
do_error "or that the file /etc/conf.d/undervolt is not correctly configured."
return 1
fi
fi
}
einfo_tables()
{
# display current table and a custom table
# $1 : custom table to display
# Display the voltage table currently used by the CPU
einfo "Current table: "`cat ${VTABLE_PATH} `
# Display the custom voltage table
einfo "Configured table: ${1}"
}
set_custom_table()
{
# Set a custom table through the sysfs interface
# $1 : custom table to set
# Display current table and custom table that will be set
einfo_tables "${1}"
# Write the custom voltage to the SysFS interface and display the
# new voltage table that is now used by the CPU if there is no error
echo "${1}" > ${VTABLE_PATH} && \
einfo "Applied table: "`cat ${VTABLE_PATH}`
return $?
}
start()
{
ebegin "Changing CPU voltages table"
if [ "$IS_CONFIGURED" = "yes" ]; then
sysfs_check || return 1
set_custom_table "${CUSTOM_VTABLE}"
eend $?
else
do_error "Custom voltage table is not configured. Check the file /etc/conf.d/undervolt"
fi
}
# I think it is not necessary to switch to the default voltage table on shutdown
# But this init script provides that feature in case you don't agree.
stop()
{
if [ "$SWITCH_BACK" = "yes" ]; then
if [ "$IS_CONFIGURED" = "yes" ]; then
ebegin "Switching back to default CPU voltage table"
sysfs_check || return 1
set_custom_table "${DEFAULT_VTABLE}"
eend $?
else
do_error "Default voltage table is not configured. Check the file /etc/conf.d/undervolt"
fi
else
ebegin "Not switching back to default CPU voltage table (disabled in configuration)"
eend 0
fi
}

29
sys-power/undervolt/undervolt-1.ebuild Normal file
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# Copyright 1999-2009 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $
EAPI="2"
inherit eutils
DESCRIPTION="A collection of undervolt scripts"
HOMEPAGE="http://www.linux-phc.org/forum/viewtopic.php?f=19&t=44 http://www.s3pp.de/misc/linux-phc-optimize.bash"
# SRC_URI="mirror://sourceforge/${PN}/${PF}.tar.gz"
LICENSE="GPL-2"
SLOT="0"
KEYWORDS="~amd64 ~x86"
IUSE=""
DEPEND=""
RDEPEND="app-benchmarks/cpuburn"
src_compile() { :; }
src_install() {
newinitd ${FILESDIR}/undervolt.initd undervolt
newconfd ${FILESDIR}/undervolt.confd undervolt
insinto /usr/share/undervolt
doins ${FILESDIR}/functions.bash
newbin ${FILESDIR}/linux-phc-optimize.bash undervolt-optimize
}