Check if a CPU is 64 bits

From linux, type: 

cat /proc/cpuinfo

Look for the flag ‘lm’; if present, the processor is 64 bits (‘lm’ stands for ‘Long mode’)

Check if a CPU supports virtualization technology

From linux, type: 

cat /proc/cpuinfo

Look whether the flag ‘vmx’ (in Intel processors) or ‘svm’ (in AMD processors) is defined. If yes, the processor supports virtualization technology.

Force maximum CPU speed in Linux
  1. Install ‘cpufrequtils’ package
  2. Add/edit the following values in ‘/etc/default/cpufrequtils’: 
    ENABLE="true" 
GOVERNOR="performance" 
MAX_SPEED=1833000 
MIN_SPEED=1000000

    Change the values of MAX_SPEED and MIN_SPEED according to your CPU; the possible values of ‘MAX_SPEED’ and ‘MIN_SPEED’ are determined by the output of the following command:

    cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
  3. Start the service: 
    /etc/init.d/cpufrequtils start