Disabling CPU core


I found this interesting.

I ran this first to get my 4 core CPU temp.

sensors -f | grep "thermistor" >> CPU_TEMP.txt

Then I turned off one core using

  echo 0 | sudo tee /sys/devices/system/cpu/cpu1/online

Sure enough, the temp dropped by about 2 degrees.
One use is for laptops to extend battery life.