tools/testing/selftests/cpufreq/cpufreq.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 # protect against multiple inclusion
   5 if [ $FILE_CPUFREQ ]; then
   6         return 0
   7 else
   8         FILE_CPUFREQ=DONE
   9 fi
  10
  11 source cpu.sh
  12
  13
  14 # $1: cpu
  15 cpu_should_have_cpufreq_directory()
  16 {
  17         if [ ! -d $CPUROOT/$1/cpufreq ]; then
  18                 printf "Warning: No cpufreq directory present for $1\n"
  19         fi
  20 }
  21
  22 cpu_should_not_have_cpufreq_directory()
  23 {
  24         if [ -d $CPUROOT/$1/cpufreq ]; then
  25                 printf "Warning: cpufreq directory present for $1\n"
  26         fi
  27 }
  28
  29 for_each_policy()
  30 {
  31         policies=$(ls $CPUFREQROOT| grep "policy[0-9].*")
  32         for policy in $policies; do
  33                 $@ $policy
  34         done
  35 }
  36
  37 for_each_policy_concurrent()
  38 {
  39         policies=$(ls $CPUFREQROOT| grep "policy[0-9].*")
  40         for policy in $policies; do
  41                 $@ $policy &
  42         done
  43 }
  44
  45 # $1: Path
  46 read_cpufreq_files_in_dir()
  47 {
  48         local files=`ls $1`
  49
  50         printf "Printing directory: $1\n\n"
  51
  52         for file in $files; do
  53                 if [ -f $1/$file ]; then
  54                         printf "$file:"
  55                         cat $1/$file
  56                 else
  57                         printf "\n"
  58                         read_cpufreq_files_in_dir "$1/$file"
  59                 fi
  60         done
  61         printf "\n"
  62 }
  63
  64
  65 read_all_cpufreq_files()
  66 {
  67         printf "** Test: Running ${FUNCNAME[0]} **\n\n"
  68
  69         read_cpufreq_files_in_dir $CPUFREQROOT
  70
  71         printf "%s\n\n" "------------------------------------------------"
  72 }
  73
  74
  75 # UPDATE CPUFREQ FILES
  76
  77 # $1: directory path
  78 update_cpufreq_files_in_dir()
  79 {
  80         local files=`ls $1`
  81
  82         printf "Updating directory: $1\n\n"
  83
  84         for file in $files; do
  85                 if [ -f $1/$file ]; then
  86                         # file is writable ?
  87                         local wfile=$(ls -l $1/$file | awk '$1 ~ /^.*w.*/ { print $NF; }')
  88
  89                         if [ ! -z $wfile ]; then
  90                                 # scaling_setspeed is a special file and we
  91                                 # should skip updating it
  92                                 if [ $file != "scaling_setspeed" ]; then
  93                                         local val=$(cat $1/$file)
  94                                         printf "Writing $val to: $file\n"
  95                                         echo $val > $1/$file
  96                                 fi
  97                         fi
  98                 else
  99                         printf "\n"
 100                         update_cpufreq_files_in_dir "$1/$file"
 101                 fi
 102         done
 103
 104         printf "\n"
 105 }
 106
 107 # Update all writable files with their existing values
 108 update_all_cpufreq_files()
 109 {
 110         printf "** Test: Running ${FUNCNAME[0]} **\n\n"
 111
 112         update_cpufreq_files_in_dir $CPUFREQROOT
 113
 114         printf "%s\n\n" "------------------------------------------------"
 115 }
 116
 117
 118 # CHANGE CPU FREQUENCIES
 119
 120 # $1: policy
 121 find_current_freq()
 122 {
 123         cat $CPUFREQROOT/$1/scaling_cur_freq
 124 }
 125
 126 # $1: policy
 127 # $2: frequency
 128 set_cpu_frequency()
 129 {
 130         printf "Change frequency for $1 to $2\n"
 131         echo $2 > $CPUFREQROOT/$1/scaling_setspeed
 132 }
 133
 134 # $1: policy
 135 test_all_frequencies()
 136 {
 137         local filepath="$CPUFREQROOT/$1"
 138
 139         backup_governor $1
 140
 141         local found=$(switch_governor $1 "userspace")
 142         if [ $found = 1 ]; then
 143                 printf "${FUNCNAME[0]}: userspace governor not available for: $1\n"
 144                 return;
 145         fi
 146
 147         printf "Switched governor for $1 to userspace\n\n"
 148
 149         local freqs=$(cat $filepath/scaling_available_frequencies)
 150         printf "Available frequencies for $1: $freqs\n\n"
 151
 152         # Set all frequencies one-by-one
 153         for freq in $freqs; do
 154                 set_cpu_frequency $1 $freq
 155         done
 156
 157         printf "\n"
 158
 159         restore_governor $1
 160 }
 161
 162 # $1: loop count
 163 shuffle_frequency_for_all_cpus()
 164 {
 165         printf "** Test: Running ${FUNCNAME[0]} for $1 loops **\n\n"
 166
 167         for i in `seq 1 $1`; do
 168                 for_each_policy test_all_frequencies
 169         done
 170         printf "\n%s\n\n" "------------------------------------------------"
 171 }
 172
 173 # Basic cpufreq tests
 174 cpufreq_basic_tests()
 175 {
 176         printf "*** RUNNING CPUFREQ SANITY TESTS ***\n"
 177         printf "====================================\n\n"
 178
 179         count=$(count_cpufreq_managed_cpus)
 180         if [ $count = 0 ]; then
 181                 printf "No cpu is managed by cpufreq core, exiting\n"
 182                 exit;
 183         else
 184                 printf "CPUFreq manages: $count CPUs\n\n"
 185         fi
 186
 187         # Detect & print which CPUs are not managed by cpufreq
 188         print_unmanaged_cpus
 189
 190         # read/update all cpufreq files
 191         read_all_cpufreq_files
 192         update_all_cpufreq_files
 193
 194         # hotplug cpus
 195         reboot_cpus 5
 196
 197         # Test all frequencies
 198         shuffle_frequency_for_all_cpus 2
 199
 200         # Test all governors
 201         shuffle_governors_for_all_cpus 1
 202 }
 203
 204 # Suspend/resume
 205 # $1: "suspend" or "hibernate", $2: loop count
 206 do_suspend()
 207 {
 208         printf "** Test: Running ${FUNCNAME[0]}: Trying $1 for $2 loops **\n\n"
 209
 210         # Is the directory available
 211         if [ ! -d $SYSFS/power/ -o ! -f $SYSFS/power/state ]; then
 212                 printf "$SYSFS/power/state not available\n"
 213                 return 1
 214         fi
 215
 216         if [ $1 = "suspend" ]; then
 217                 filename="mem"
 218         elif [ $1 = "hibernate" ]; then
 219                 filename="disk"
 220         else
 221                 printf "$1 is not a valid option\n"
 222                 return 1
 223         fi
 224
 225         if [ -n $filename ]; then
 226                 present=$(cat $SYSFS/power/state | grep $filename)
 227
 228                 if [ -z "$present" ]; then
 229                         printf "Tried to $1 but $filename isn't present in $SYSFS/power/state\n"
 230                         return 1;
 231                 fi
 232
 233                 for i in `seq 1 $2`; do
 234                         printf "Starting $1\n"
 235                         echo $filename > $SYSFS/power/state
 236                         printf "Came out of $1\n"
 237
 238                         printf "Do basic tests after finishing $1 to verify cpufreq state\n\n"
 239                         cpufreq_basic_tests
 240                 done
 241         fi
 242 }