linux-tests/stress_test.sh

   1 #!/bin/bash
   2 # Do some random operations on a yaffs2 file system
   3
   4 MTD="/dev/mtdblock0"
   5 MOUNT_PT="/mnt"
   6 TEST_DIR="$MOUNT_PT/stress_dir"
   7 REF_FILE="$MOUNT_PT/ref.file"
   8 SUM_FILE="$MOUNT_PT/sum.file"
   9 MIN_LOW_WATER=5
  10 MAX_LOW_WATER=85
  11 MIN_HIGH_WATER=15
  12 MAX_HIGH_WATER=95
  13
  14 low_water=25
  15 high_water=90
  16 df_percent=50
  17
  18
  19 random_number(){
  20  local val
  21  val=$RANDOM
  22  echo $val
  23 }
  24
  25
  26 update_df_percent(){
  27         df_percent=$(df | grep $MTD | sed "s_[ %] *_ _g" | cut -d" " -f 5)
  28 }
  29
  30 update_df_percent
  31
  32 calc_low_water() {
  33    low_water=0
  34    while [ $low_water -lt $MIN_LOW_WATER ] ;
  35    do
  36         low_water=$(($(random_number) % 100))
  37         while [[ $low_water -ge $df_percent  || $low_water -gt $MAX_LOW_WATER ]] ;
  38         do
  39                 low_water=$(($(random_number) % 100))
  40         done
  41    done
  42 }
  43
  44 calc_high_water() {
  45    high_water=100
  46    while [ $high_water -gt $MAX_HIGH_WATER ] ;
  47    do
  48         high_water=$(($(random_number) % 100))
  49         while [[ $high_water -le $df_percent || $high_water -lt $MIN_HIGH_WATER ]] ;
  50         do
  51                 high_water=$(($(random_number) % 100))
  52         done
  53    done
  54 }
  55
  56
  57
  58 maybe_sleep(){
  59   local val
  60   val=$(($(random_number) % 10000))
  61   if [ $val -le 1 ] ; then
  62         val=$(($(random_number) % 100))
  63         echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
  64         echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
  65         echo "!!!!!!!!!                                                              !!!!!!!!!!!!!!!!!!!"
  66         echo "!!!!!!!!! S L E E P  $val"
  67         echo "!!!!!!!!!                                                              !!!!!!!!!!!!!!!!!!!"
  68         echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
  69         echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
  70         sleep $val
  71         echo " Sleep completed "
  72   fi
  73 }
  74
  75 remount_count=0
  76 maybe_remount_count=0
  77
  78 maybe_remount(){
  79   local val
  80   val=$(($(random_number) % 10000))
  81   maybe_remount_count=$(($maybe_remount_count+1))
  82
  83   if [ $val -le 1 ] ; then
  84         remount_count=$(($remount_count+1))
  85         echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
  86         echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
  87         echo "!!!!!!!!!                                                              !!!!!!!!!!!!!!!!!!!"
  88         echo "!!!!!!!!! R E M O U N T $remount_count from $maybe_remount_count"
  89         echo "!!!!!!!!!                                                              !!!!!!!!!!!!!!!!!!!"
  90         echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
  91         echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
  92
  93         umount $MOUNT_PT
  94         mount -t yaffs2 $MTD $MOUNT_PT
  95   fi
  96
  97 }
  98
  99
 100
 101 make_space_slow(){
 102
 103    update_df_percent
 104
 105
 106    calc_low_water
 107
 108    echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
 109    echo "!!!!! Slowly reduce usage from $df_percent percent to $low_water percent"
 110    echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
 111    echo "!!!!!!"
 112    while [ $df_percent -ge $low_water ] ; do
 113
 114       DELETE_FILE=`ls $TEST_DIR | head -n 1`
 115       rm -rf "$TEST_DIR/$DELETE_FILE"
 116
 117       update_df_percent
 118       maybe_sleep
 119       maybe_remount
 120    done
 121 }
 122
 123 make_space_fast(){
 124
 125    calc_low_water
 126    update_df_percent
 127
 128    echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
 129    echo "!!!!! Quickly reduce usage from $df_percent percent to $low_water percent"
 130    echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
 131    echo "!!!!!!"
 132    while [ $df_percent -ge $low_water ] ; do
 133
 134       file_prefix=$(($(random_number) % 100))
 135       rm -rf $TEST_DIR/dummy $TEST_DIR/$file_prefix*
 136
 137       update_df_percent
 138       maybe_sleep
 139       maybe_remount
 140    done
 141 }
 142
 143 make_space(){
 144    local xx
 145    xx=$(($(random_number) % 100))
 146    update_df_percent
 147
 148    if [ $df_percent -gt $MIN_LOW_WATER ] ; then
 149
 150            if [ $xx -lt 50 ] ; then
 151                 make_space_slow
 152            else
 153                 make_space_fast
 154            fi
 155   fi
 156 }
 157
 158 periodic_action(){
 159
 160   maybe_sleep
 161   maybe_remount
 162 }
 163
 164
 165
 166 drop_caches(){
 167         echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
 168         echo "!!!!!!!!!!! D R O P   C A C H E S"
 169         echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
 170         sync
 171         echo 3 > /proc/sys/vm/drop_caches
 172 }
 173
 174 maybe_drop_caches(){
 175         local x
 176         x=$(($(random_number) % 10000))
 177         if [ $x -eq 99 ] ; then
 178                 drop_caches
 179         fi
 180 }
 181
 182 create_files(){
 183
 184    update_df_percent
 185
 186    if [ $df_percent -lt $MAX_HIGH_WATER ] ; then
 187
 188            calc_high_water
 189
 190            rm -f $SUM_FILE
 191
 192            for i in $(find $TEST_DIR) ; do
 193                 [ -f $i ] && md5sum $i >> $SUM_FILE
 194            done
 195
 196            echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
 197            echo "!!!!! Fill from $df_percent percent to $high_water percent"
 198            echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
 199            chunks=$(($(random_number) % 100))
 200
 201
 202            update_df_percent
 203
 204            skip_file_create=0
 205            skip_dir_create=0
 206
 207            while [ $df_percent -le $high_water ] ; do
 208
 209                 if [ $skip_file_create -lt 1 ] ; then
 210                         fsize=$(($(random_number)*$chunks+1))
 211                         echo "!!!!!! File size is $fsize"
 212                         dd if=/dev/urandom of=$REF_FILE bs=$fsize count=1
 213                         REF_SUM=$(md5sum $REF_FILE | cut -f1 -d" " )
 214                         skip_file_create=$(($(random_number) % 50))
 215                 else
 216                         skip_file_create=$(($skip_file_create-1))
 217                 fi
 218
 219                 if [ $skip_dir_create -lt 1 ] ; then
 220                         dir_name=$TEST_DIR/$(random_number)-dir
 221                         mkdir -p $dir_name
 222                         echo "Creating in directory $dir_name"
 223                         skip_dir_create=$(($(random_number) % 100))
 224                 else
 225                         skip_dir_create=$(($skip_dir_create-1))
 226                 fi
 227
 228                 FNAME=$dir_name/$(random_number)-$(random_number)-$(random_number)
 229                 cp $REF_FILE $FNAME
 230                 FILE_SUM=$(md5sum $FNAME | cut -f1 -d" ")
 231                 md5sum $FNAME >> $SUM_FILE
 232
 233                 if [ "$FILE_SUM" != "$REF_SUM" ] ; then
 234                         echo "File comparison between $REF_FILE and $FNAME failed $REF_SUM - $FILE_SUM"
 235                         exit 1
 236                 fi
 237
 238                 update_df_percent
 239                 maybe_sleep
 240                 maybe_remount
 241                 maybe_drop_caches
 242            done
 243
 244            if ! md5sum -c $SUM_FILE > /dev/null ; then
 245                 echo "File verification failed"
 246                 exit 1
 247            fi
 248    fi
 249
 250 }
 251
 252 fill_disk(){
 253         echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
 254         echo "!!!!!!!!!!! F I L L   D I S K"
 255         echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
 256         full=0
 257         while [ $full -eq 0 ] ; do
 258                 dd if=/dev/urandom of=$TEST_DIR/$(random_number)-$(random_number)-fill bs=1000 count=50 2> /dev/null || full=1 || true
 259         done
 260
 261 }
 262
 263 rm -rf $TEST_DIR/*
 264 mkdir -p $TEST_DIR
 265 touch $TEST_DIR/dont-want-empty-dir
 266 create_files
 267
 268 while true ; do
 269
 270         x=$(($(random_number) % 100))
 271         if [ $x -lt 50 ] ; then
 272                 create_files
 273         fi
 274
 275         x=$(($(random_number) % 100))
 276         if [ $x -lt 50 ] ; then
 277                 make_space
 278         fi
 279
 280         x=$(($(random_number) % 100))
 281         if [ $x -lt 5 ] ; then
 282                 fill_disk
 283         fi
 284
 285         x=$(($(random_number) % 100))
 286         if [ $x -lt 1 ] ; then
 287                 drop_caches
 288         fi
 289 done