1 | #!/bin/sh |
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2 | # Startup script for cpuspeed |
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3 | # |
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4 | # chkconfig: 12345 06 99 |
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5 | # description: Run dynamic CPU speed daemon and/or load appropriate |
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6 | # cpu frequency scaling kernel modules and/or governors |
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7 | |
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8 | # Source function library. |
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9 | . /etc/rc.d/init.d/functions |
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10 | |
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11 | [ -r /proc/cmdline ] && cmdline=$(cat /proc/cmdline) |
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12 | if (strstr "$cmdline" nocpufreq) ; then exit 0 ; fi |
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13 | |
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14 | prog="cpuspeed" |
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15 | |
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16 | [ -f /usr/sbin/$prog ] || exit 5 |
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17 | |
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18 | # Get config. |
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19 | if [ -f /etc/$prog.conf ]; then |
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20 | . /etc/$prog.conf |
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21 | fi |
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22 | |
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23 | cpufreqd=/sys/devices/system/cpu/cpufreq |
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24 | cpu0freqd=/sys/devices/system/cpu/cpu0/cpufreq |
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25 | cpus='/sys/devices/system/cpu/cpu[0-9]*' |
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26 | testpat="${cpus}/cpufreq/scaling_driver" |
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27 | lockfile="/var/lock/subsys/$prog" |
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28 | xendir="/proc/xen" |
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29 | logger="/usr/bin/logger -p info -t $prog" |
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30 | IGNORE_NICE=${IGNORE_NICE:-0} |
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31 | module_loaded=false |
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32 | |
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33 | some_file_exist() { |
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34 | while [ "$1" ] ; do |
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35 | [ -f "$1" ] && return 0 |
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36 | shift |
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37 | done |
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38 | return 1 |
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39 | } |
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40 | |
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41 | governor_is_module() { |
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42 | # Check to see if the requested cpufreq governor |
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43 | # is provided as a kernel module or not |
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44 | module_info=`/sbin/modinfo cpufreq-${governor}` |
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45 | return $? |
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46 | } |
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47 | |
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48 | is_p4_clockmod() { |
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49 | if [ `/sbin/lsmod | grep -c -w "p4.clockmod"` -ge 1 -a -d "/sys/devices/system/cpu/cpu0/thermal_throttle" ]; then |
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50 | return 0 |
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51 | fi |
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52 | return 1 |
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53 | } |
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54 | |
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55 | governor_module_loaded() { |
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56 | # Check to see if we have a module loaded for |
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57 | # the current cpufreq governor |
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58 | if [ -e ${cpu0freqd}/scaling_governor ]; then |
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59 | governor=`cat ${cpu0freqd}/scaling_governor` |
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60 | else |
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61 | governor="none" |
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62 | fi |
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63 | if [ "${governor}" != "none" -a `/sbin/lsmod | grep -c -w "cpufreq.${governor}"` -ge 1 ]; then |
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64 | return 0 |
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65 | fi |
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66 | return 1 |
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67 | } |
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68 | |
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69 | adjust_cpufreq() { |
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70 | # First arg is a param under $cpufreqd |
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71 | # Second arg is the value you want to set that param to |
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72 | echo $2 > $cpufreqd/$1 |
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73 | } |
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74 | |
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75 | adjust_governor() { |
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76 | # First arg is a param under $cpu/cpufreq/ |
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77 | # Second arg is the value you want to set that param to |
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78 | for cpu in ${cpus}; do |
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79 | echo $2 > $cpu/cpufreq/$1 |
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80 | done |
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81 | } |
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82 | |
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83 | start_cpuspeed() { |
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84 | echo -n $"Starting $prog: " |
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85 | # cpuspeed daemon thresholds are specified as idle percentages, |
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86 | # cpufreq modules as busy percentages, so we need to do some |
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87 | # math here for use of unified config... |
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88 | # DOWN_THRESHOLD doesn't mean exactly the same thing for |
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89 | # cpuspeed as it does for the cpufreq governors, but close |
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90 | # enough, and if not specified, we use same defaults as governors. |
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91 | if [ -n "$UP_THRESHOLD" ]; then |
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92 | let UP_THRESHOLD=100-$UP_THRESHOLD |
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93 | else |
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94 | UP_THRESHOLD=20 |
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95 | fi |
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96 | if [ -n "$DOWN_THRESHOLD" ]; then |
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97 | let DOWN_THRESHOLD=100-$DOWN_THRESHOLD |
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98 | else |
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99 | DOWN_THRESHOLD=80 |
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100 | fi |
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101 | OPTS="$OPTS -p $UP_THRESHOLD $DOWN_THRESHOLD" |
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102 | if [ -n "$MIN_SPEED" ]; then |
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103 | OPTS="$OPTS -m $MIN_SPEED" |
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104 | fi |
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105 | if [ -n "$MAX_SPEED" ]; then |
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106 | OPTS="$OPTS -M $MAX_SPEED" |
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107 | fi |
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108 | if [ "$IGNORE_NICE" -eq 1 ]; then |
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109 | OPTS="$OPTS -n" |
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110 | fi |
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111 | daemon $prog -d $OPTS |
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112 | RETVAL=$? |
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113 | return $RETVAL |
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114 | } |
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115 | |
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116 | stop_cpuspeed() { |
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117 | if [ -n "`pidof $prog`" ]; then |
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118 | echo -n $"Stopping $prog: " |
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119 | killproc $prog -USR1 |
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120 | killproc $prog -INT |
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121 | fi |
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122 | if [ -n "`pidof $prog`" ]; then |
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123 | killproc $prog |
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124 | fi |
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125 | RETVAL=$? |
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126 | return $RETVAL |
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127 | } |
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128 | |
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129 | start() { |
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130 | if [ ! -f $lockfile ] && [ ! -d "$xendir" ]; then |
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131 | cpu_vendor=$(awk '/vendor_id/{print $3}' /proc/cpuinfo | tail -n 1) |
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132 | cpu_family=$(awk '/cpu family/{print $4}' /proc/cpuinfo | tail -n 1) |
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133 | if ! some_file_exist $testpat ; then |
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134 | # Attempt to load scaling_driver if not loaded |
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135 | # but it is configured |
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136 | if [ -n "$DRIVER" ]; then |
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137 | /sbin/modprobe "$DRIVER" |
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138 | elif [ "$cpu_vendor" == AuthenticAMD ] && [ "$cpu_family" -ge 7 ]; then |
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139 | # Try loading powernow-k8 if this is an AMD processor, |
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140 | # family 7 or greater (Athlon XP/MP was family 6) |
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141 | pk8m=$(/sbin/modinfo powernow-k8 > /dev/null 2>&1) |
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142 | if [ "$?" -eq 0 ]; then |
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143 | /sbin/modprobe powernow-k8 2> /dev/null |
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144 | [ -d ${cpu0freqd} ] || /sbin/modprobe -r powernow-k8 2> /dev/null |
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145 | fi |
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146 | elif [ -d /proc/acpi ]; then |
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147 | # use ACPI as a fallback |
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148 | /sbin/modprobe acpi-cpufreq 2> /dev/null |
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149 | # if even ACPI didn't work, remove it |
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150 | # and then next test will bail out. |
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151 | [ -d ${cpu0freqd} ] || /sbin/modprobe -r acpi-cpufreq 2> /dev/null |
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152 | fi |
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153 | if [ ! -d ${cpu0freqd} -a "$cpu_vendor" == GenuineIntel ]; then |
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154 | # last-ditch effort for Intel proc boxes, try our neutered p4-clockmod |
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155 | # to get at least passive cooling support (no clock changes) |
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156 | /sbin/modprobe p4-clockmod 2> /dev/null |
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157 | if [ -d ${cpu0freqd} ]; then |
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158 | echo -n "Enabling p4-clockmod driver (passive cooling only): " |
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159 | success; echo |
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160 | return 0 |
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161 | else |
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162 | /sbin/modprobe -r p4-clockmod 2> /dev/null |
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163 | fi |
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164 | fi |
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165 | fi |
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166 | |
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167 | # If we get this far with no driver, we must have no scaling. |
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168 | # We're doomed. |
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169 | [ ! -f ${cpu0freqd}/scaling_driver ] && return 6 |
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170 | |
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171 | # Okay, we have a driver, carry on... |
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172 | drv=`cat ${cpu0freqd}/scaling_driver` |
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173 | |
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174 | # Figure out default governor to use |
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175 | case "$drv" in |
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176 | centrino|powernow-k8|acpi-cpufreq|e_powersaver) |
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177 | default_governor=ondemand |
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178 | ;; |
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179 | *) |
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180 | default_governor=userspace |
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181 | ;; |
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182 | esac |
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183 | governor=${GOVERNOR:-${default_governor}} |
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184 | |
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185 | # Load governor module, if need be, and validate |
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186 | governor_is_module && /sbin/modprobe cpufreq-${governor} |
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187 | if [ `grep -c -w ${governor} ${cpu0freqd}/scaling_available_governors` -ge 1 ]; then |
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188 | $logger "Enabling ${governor} cpu frequency scaling governor" |
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189 | else |
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190 | $logger "Invalid governor \"${governor}\" specified, falling back to ${default_governor}" |
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191 | governor_is_module && /sbin/modprobe -r cpufreq-${governor} |
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192 | governor=${default_governor} |
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193 | governor_is_module && /sbin/modprobe cpufreq-${governor} |
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194 | fi |
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195 | |
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196 | # Set governor |
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197 | adjust_governor scaling_governor ${governor} |
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198 | |
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199 | # Run cpuspeed daemon for userspace gov, kernel ones otherwise |
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200 | if [ "${governor}" == "userspace" ]; then |
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201 | start_cpuspeed |
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202 | RETVAL=$? |
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203 | else |
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204 | if [ -n "$MIN_SPEED" ]; then |
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205 | adjust_cpufreq scaling_min_freq $MIN_SPEED |
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206 | fi |
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207 | if [ -n "$MAX_SPEED" ]; then |
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208 | adjust_cpufreq scaling_max_freq $MAX_SPEED |
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209 | fi |
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210 | if [ -n "$UP_THRESHOLD" -a ${governor} == "ondemand" ]; then |
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211 | adjust_cpufreq ondemand/up_threshold $UP_THRESHOLD |
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212 | fi |
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213 | if [ -n "$DOWN_THRESHOLD" -a ${governor} == "conservative" ]; then |
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214 | adjust_cpufreq conservative/down_threshold $DOWN_THRESHOLD |
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215 | fi |
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216 | if [ "$IGNORE_NICE" -eq 1 -a ${governor} == "ondemand" -o ${governor} == "conservative" ]; then |
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217 | adjust_cpufreq ${governor}/ignore_nice_load $IGNORE_NICE |
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218 | fi |
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219 | echo -n "Enabling ${governor} cpu frequency scaling: " |
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220 | success |
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221 | RETVAL=0 |
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222 | fi |
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223 | echo |
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224 | # Technically, not quite right in non-cpuspeed daemon |
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225 | # cases, but close enough to indicate that we're |
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226 | # doing some sort of cpu frequency scaling. |
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227 | [ $RETVAL = 0 ] && touch $lockfile |
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228 | else |
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229 | if [ -d "$xendir" ]; then |
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230 | $logger "CPU Frequency scaling is currently not supported on xen kernels" |
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231 | fi |
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232 | return 0 |
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233 | fi |
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234 | return $RETVAL |
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235 | } |
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236 | |
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237 | stop() { |
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238 | is_p4_clockmod && p4status="true" |
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239 | if [ "$p4status" == "true" ]; then |
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240 | echo "p4-clockmod passive cooling support cannot be stopped" |
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241 | return 0 |
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242 | fi |
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243 | [ ! -f ${cpu0freqd}/scaling_driver ] && return 0 |
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244 | drv=`cat ${cpu0freqd}/scaling_driver` |
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245 | governor_module_loaded && module_loaded=true |
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246 | |
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247 | if [ "${governor}" != "userspace" ]; then |
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248 | echo -n "Disabling ${governor} cpu frequency scaling: " |
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249 | $logger "Disabling ${governor} cpu frequency scaling governor" |
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250 | for cpu in ${cpus}; do |
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251 | echo userspace > $cpu/cpufreq/scaling_governor |
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252 | cat $cpu/cpufreq/cpuinfo_max_freq > $cpu/cpufreq/scaling_setspeed |
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253 | done |
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254 | if [ $module_loaded == true ]; then |
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255 | /sbin/modprobe -r cpufreq-${governor} |
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256 | fi |
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257 | success |
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258 | RETVAL=0 |
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259 | else |
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260 | stop_cpuspeed |
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261 | RETVAL=$? |
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262 | fi |
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263 | echo |
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264 | [ -n "$DRIVER" ] && /sbin/modprobe -r $DRIVER |
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265 | [ $RETVAL = 0 ] && RETVAL=$? |
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266 | [ $RETVAL = 0 ] && rm -f $lockfile |
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267 | return $RETVAL |
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268 | } |
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269 | |
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270 | case "$1" in |
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271 | start) |
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272 | start |
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273 | ;; |
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274 | |
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275 | stop) |
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276 | stop |
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277 | ;; |
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278 | |
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279 | status) |
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280 | is_p4_clockmod && p4status="true" |
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281 | if [ "$p4status" == "true" ]; then |
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282 | echo "p4-clockmod passive cooling is enabled" |
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283 | exit 0 |
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284 | fi |
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285 | governor_module_loaded && module_loaded=true |
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286 | if [ -d "$xendir" ]; then |
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287 | echo "Frequency scaling not supported under xen kernels" |
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288 | RETVAL=0 |
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289 | elif [ $module_loaded == true -o ${governor} == "performance" ]; then |
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290 | echo "Frequency scaling enabled using ${governor} governor" |
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291 | RETVAL=0 |
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292 | else |
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293 | status $prog |
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294 | RETVAL="$?" |
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295 | fi |
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296 | ;; |
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297 | |
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298 | restart) |
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299 | stop |
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300 | start |
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301 | ;; |
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302 | |
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303 | condrestart) |
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304 | governor_module_loaded && module_loaded=true |
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305 | if [ $module_loaded == true -o -n "`pidof $prog`" -o ${governor} == "performance" ]; then |
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306 | stop |
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307 | start |
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308 | fi |
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309 | ;; |
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310 | |
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311 | *) |
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312 | echo $"Usage: $0 {start|stop|restart|condrestart|status}" |
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313 | exit 3 |
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314 | ;; |
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315 | esac |
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316 | |
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317 | exit $RETVAL |
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