1#!/bin/bash 2# 3# Test governors 4 5# protect against multiple inclusion 6if [ $FILE_GOVERNOR ]; then 7 return 0 8else 9 FILE_GOVERNOR=DONE 10fi 11 12source cpu.sh 13source cpufreq.sh 14 15CUR_GOV= 16CUR_FREQ= 17 18# Find governor's directory path 19# $1: policy, $2: governor 20find_gov_directory() 21{ 22 if [ -d $CPUFREQROOT/$2 ]; then 23 printf "$CPUFREQROOT/$2\n" 24 elif [ -d $CPUFREQROOT/$1/$2 ]; then 25 printf "$CPUFREQROOT/$1/$2\n" 26 else 27 printf "INVALID\n" 28 fi 29} 30 31# $1: policy 32find_current_governor() 33{ 34 cat $CPUFREQROOT/$1/scaling_governor 35} 36 37# $1: policy 38backup_governor() 39{ 40 CUR_GOV=$(find_current_governor $1) 41 42 printf "Governor backup done for $1: $CUR_GOV\n" 43 44 if [ $CUR_GOV == "userspace" ]; then 45 CUR_FREQ=$(find_current_freq $1) 46 printf "Governor frequency backup done for $1: $CUR_FREQ\n" 47 fi 48 49 printf "\n" 50} 51 52# $1: policy 53restore_governor() 54{ 55 __switch_governor $1 $CUR_GOV 56 57 printf "Governor restored for $1 to $CUR_GOV\n" 58 59 if [ $CUR_GOV == "userspace" ]; then 60 set_cpu_frequency $1 $CUR_FREQ 61 printf "Governor frequency restored for $1: $CUR_FREQ\n" 62 fi 63 64 printf "\n" 65} 66 67# param: 68# $1: policy, $2: governor 69__switch_governor() 70{ 71 echo $2 > $CPUFREQROOT/$1/scaling_governor 72} 73 74# param: 75# $1: cpu, $2: governor 76__switch_governor_for_cpu() 77{ 78 echo $2 > $CPUROOT/$1/cpufreq/scaling_governor 79} 80 81# SWITCH GOVERNORS 82 83# $1: cpu, $2: governor 84switch_governor() 85{ 86 local filepath=$CPUFREQROOT/$1/scaling_available_governors 87 88 # check if governor is available 89 local found=$(cat $filepath | grep $2 | wc -l) 90 if [ $found = 0 ]; then 91 echo 1; 92 return 93 fi 94 95 __switch_governor $1 $2 96 echo 0; 97} 98 99# $1: policy, $2: governor 100switch_show_governor() 101{ 102 cur_gov=find_current_governor 103 if [ $cur_gov == "userspace" ]; then 104 cur_freq=find_current_freq 105 fi 106 107 # switch governor 108 __switch_governor $1 $2 109 110 printf "\nSwitched governor for $1 to $2\n\n" 111 112 if [ $2 == "userspace" -o $2 == "powersave" -o $2 == "performance" ]; then 113 printf "No files to read for $2 governor\n\n" 114 return 115 fi 116 117 # show governor files 118 local govpath=$(find_gov_directory $1 $2) 119 read_cpufreq_files_in_dir $govpath 120} 121 122# $1: function to be called, $2: policy 123call_for_each_governor() 124{ 125 local filepath=$CPUFREQROOT/$2/scaling_available_governors 126 127 # Exit if cpu isn't managed by cpufreq core 128 if [ ! -f $filepath ]; then 129 return; 130 fi 131 132 backup_governor $2 133 134 local governors=$(cat $filepath) 135 printf "Available governors for $2: $governors\n" 136 137 for governor in $governors; do 138 $1 $2 $governor 139 done 140 141 restore_governor $2 142} 143 144# $1: loop count 145shuffle_governors_for_all_cpus() 146{ 147 printf "** Test: Running ${FUNCNAME[0]} for $1 loops **\n\n" 148 149 for i in `seq 1 $1`; do 150 for_each_policy call_for_each_governor switch_show_governor 151 done 152 printf "%s\n\n" "------------------------------------------------" 153} 154