kashu:~$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:        +60.0°C  (crit = +106.0°C)
temp2:        +60.0°C  (crit = +106.0°C)

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0:  +65.0°C  (high = +87.0°C, crit = +105.0°C)
Core 0:         +64.0°C  (high = +87.0°C, crit = +105.0°C)
Core 1:         +65.0°C  (high = +87.0°C, crit = +105.0°C)

# echo 'f1c25000:27003f' > /sys/devices/virtual/misc/sunxi-dbgreg/rw/write
# echo 'f1c25010:40000' > /sys/devices/virtual/misc/sunxi-dbgreg/rw/write
# echo 'f1c25018:10fff' > /sys/devices/virtual/misc/sunxi-dbgreg/rw/write
# echo 'f1c25004:10' > /sys/devices/virtual/misc/sunxi-dbgreg/rw/write

# echo 'f1c25020' > /sys/devices/virtual/misc/sunxi-dbgreg/rw/read
$ tail -n 1 /var/log/syslog
May  6 10:08:48 cubietruck kernel: [ 1766.866356] 0x72c

$echo "ibase=16; 72C" | bc
1836

$ echo "scale=2; (1836-1447)/10" | bc
38.90

kashu:~$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:        +60.0°C  (crit = +106.0°C)
temp2:        +60.0°C  (crit = +106.0°C)

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0:  +63.0°C  (high = +87.0°C, crit = +105.0°C)
Core 0:         +56.0°C  (high = +87.0°C, crit = +105.0°C)
Core 1:         +63.0°C  (high = +87.0°C, crit = +105.0°C)

kashu:~$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:        +49.0°C  (crit = +106.0°C)
temp2:        +49.0°C  (crit = +106.0°C)

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0:  +47.0°C  (high = +87.0°C, crit = +105.0°C)
Core 0:         +44.0°C  (high = +87.0°C, crit = +105.0°C)
Core 1:         +47.0°C  (high = +87.0°C, crit = +105.0°C)

#!/bin/bash
# ==============================================================
# CPU limit daemon - set PID's max. percentage CPU consumptions
# ==============================================================

# Variables
CPU_LIMIT=30        # Maximum percentage CPU consumption by each PID
DAEMON_INTERVAL=2   # Daemon check interval in seconds
BLACK_PROCESSES_LIST="chromium"   # Limit only processes defined in this variable. If variable is empty (default) all violating processes are limited.
WHITE_PROCESSES_LIST=   # Limit all processes except processes defined in this variable. If variable is empty (default) all violating processes are limited.

# Check if one of the variables BLACK_PROCESSES_LIST or WHITE_PROCESSES_LIST is defined.
if [[ -n "$BLACK_PROCESSES_LIST" &&  -n "$WHITE_PROCESSES_LIST" ]] ; then    # If both variables are defined then error is produced.
   echo "At least one or both of the variables BLACK_PROCESSES_LIST or WHITE_PROCESSES_LIST must be empty."
   exit 1
elif [[ -n "$BLACK_PROCESSES_LIST" ]] ; then                                 # If this variable is non-empty then set NEW_PIDS_COMMAND variable to bellow command
   NEW_PIDS_COMMAND="top -b -n1 -c | grep -E '$BLACK_PROCESSES_LIST' | gawk '\$9>CPU_LIMIT {print \$1}' CPU_LIMIT=$CPU_LIMIT"
elif [[ -n "$WHITE_PROCESSES_LIST" ]] ; then                                 # If this variable is non-empty then set NEW_PIDS_COMMAND variable to bellow command
   NEW_PIDS_COMMAND="top -b -n1 -c | gawk 'NR>6' | grep -E -v '$WHITE_PROCESSES_LIST' | gawk '\$9>CPU_LIMIT {print \$1}' CPU_LIMIT=$CPU_LIMIT"
else
   NEW_PIDS_COMMAND="top -b -n1 -c | gawk 'NR>6 && \$9>CPU_LIMIT {print \$1}' CPU_LIMIT=$CPU_LIMIT"
fi

# Search and limit violating PIDs

temp1=$(echo "61")
temp2=$(echo "63")

while sleep $DAEMON_INTERVAL
do
   temp=$(cat /proc/acpi/ibm/thermal)
   temp=${temp:14:2}
   if [[ "$temp" > "$temp2" ]]; then
      NEW_PIDS=$(eval "$NEW_PIDS_COMMAND")                                                                    # Violating PIDs
      LIMITED_PIDS=$(ps -eo args | gawk '$1=="cpulimit" {print $3}')                                          # Already limited PIDs
      QUEUE_PIDS=$(comm -23 <(echo "$NEW_PIDS" | sort -u) <(echo "$LIMITED_PIDS" | sort -u) | grep -v '^$')   # PIDs in queue

      for i in $QUEUE_PIDS
      do
          cpulimit -p $i -l $CPU_LIMIT -z &   # Limit new violating processes
      done
   elif [[ "$temp" < "$temp1" ]]; then
      LIMITED_PIDS=$(ps -eo args | gawk '$1=="cpulimit" {print $3}')
      if [[ -n "$LIMITED_PIDS" ]]; then
         echo 'Killing all cpulimits.'
         killall cpulimit
      fi
   fi
done