linux-tests/stress_test.sh

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