Hot Adding CPU’s to a linux Virtual Machine
so i wanted to add some more processing power to a vm i am running without restarting it but didnt know how. a quick google search shows that vmware has created a script to do this for you, but i wanted to know how to do it my self. so a quick check of the script and it does the following. lists the idle cpu’s by running the following commmand ls /sys/devices/system/cpu/ | grep cpu | grep -v idle in my case this showed cpu2, cpu3 then activating those cpu’s by running echo 1 > /sys/devices/system/cpu/cpu2 echo 1 > /sys/devices/system/cpu/cpu3 a quick run of htop shows all 4 processes now working correctly without restarting. don’t you just love linux Enjoy