1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# 4# Test governors 5 6# protect against multiple inclusion 7if [ $FILE_GOVERNOR ]; then 8 return 0 9else 10 FILE_GOVERNOR=DONE 11fi 12 13source cpu.sh 14source cpufreq.sh 15 16CUR_GOV= 17CUR_FREQ= 18 19# Find governor's directory path 20# $1: policy, $2: governor 21find_gov_directory() 22{ 23 if [ -d $CPUFREQROOT/$2 ]; then 24 printf "$CPUFREQROOT/$2\n" 25 elif [ -d $CPUFREQROOT/$1/$2 ]; then 26 printf "$CPUFREQROOT/$1/$2\n" 27 else 28 printf "INVALID\n" 29 fi 30} 31 32# $1: policy 33find_current_governor() 34{ 35 cat $CPUFREQROOT/$1/scaling_governor 36} 37 38# $1: policy 39backup_governor() 40{ 41 CUR_GOV=$(find_current_governor $1) 42 43 printf "Governor backup done for $1: $CUR_GOV\n" 44 45 if [ $CUR_GOV == "userspace" ]; then 46 CUR_FREQ=$(find_current_freq $1) 47 printf "Governor frequency backup done for $1: $CUR_FREQ\n" 48 fi 49 50 printf "\n" 51} 52 53# $1: policy 54restore_governor() 55{ 56 __switch_governor $1 $CUR_GOV 57 58 printf "Governor restored for $1 to $CUR_GOV\n" 59 60 if [ $CUR_GOV == "userspace" ]; then 61 set_cpu_frequency $1 $CUR_FREQ 62 printf "Governor frequency restored for $1: $CUR_FREQ\n" 63 fi 64 65 printf "\n" 66} 67 68# param: 69# $1: policy, $2: governor 70__switch_governor() 71{ 72 echo $2 > $CPUFREQROOT/$1/scaling_governor 73} 74 75# param: 76# $1: cpu, $2: governor 77__switch_governor_for_cpu() 78{ 79 echo $2 > $CPUROOT/$1/cpufreq/scaling_governor 80} 81 82# SWITCH GOVERNORS 83 84# $1: cpu, $2: governor 85switch_governor() 86{ 87 local filepath=$CPUFREQROOT/$1/scaling_available_governors 88 89 # check if governor is available 90 local found=$(cat $filepath | grep $2 | wc -l) 91 if [ $found = 0 ]; then 92 echo 1; 93 return 94 fi 95 96 __switch_governor $1 $2 97 echo 0; 98} 99 100# $1: policy, $2: governor 101switch_show_governor() 102{ 103 cur_gov=find_current_governor 104 if [ $cur_gov == "userspace" ]; then 105 cur_freq=find_current_freq 106 fi 107 108 # switch governor 109 __switch_governor $1 $2 110 111 printf "\nSwitched governor for $1 to $2\n\n" 112 113 if [ $2 == "userspace" -o $2 == "powersave" -o $2 == "performance" ]; then 114 printf "No files to read for $2 governor\n\n" 115 return 116 fi 117 118 # show governor files 119 local govpath=$(find_gov_directory $1 $2) 120 read_cpufreq_files_in_dir $govpath 121} 122 123# $1: function to be called, $2: policy 124call_for_each_governor() 125{ 126 local filepath=$CPUFREQROOT/$2/scaling_available_governors 127 128 # Exit if cpu isn't managed by cpufreq core 129 if [ ! -f $filepath ]; then 130 return; 131 fi 132 133 backup_governor $2 134 135 local governors=$(cat $filepath) 136 printf "Available governors for $2: $governors\n" 137 138 for governor in $governors; do 139 $1 $2 $governor 140 done 141 142 restore_governor $2 143} 144 145# $1: loop count 146shuffle_governors_for_all_cpus() 147{ 148 printf "** Test: Running ${FUNCNAME[0]} for $1 loops **\n\n" 149 150 for i in `seq 1 $1`; do 151 for_each_policy call_for_each_governor switch_show_governor 152 done 153 printf "%s\n\n" "------------------------------------------------" 154} 155