add undervolt

git-svn-id: https://svn.disconnected-by-peer.at/svn/linamh/trunk/linamh@1543 6952d904-891a-0410-993b-d76249ca496b

sys-power/undervolt/files/functions.bash

@@ -0,0 +1,165 @@
+#!/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 $?
+}
+

sys-power/undervolt/files/linux-phc-optimize.bash

@@ -0,0 +1,179 @@
+#!/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

sys-power/undervolt/files/undervolt.confd

@@ -0,0 +1,22 @@
+# 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"

sys-power/undervolt/files/undervolt.initd

@@ -0,0 +1,113 @@
+#!/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
+}