How to Disable CPU Cores

CPU Information

• I’ve Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz processor, Which has 8 cores.

[mitesh@Matrix ~]$ cat /proc/cpuinfo | grep processor
processor : 0
processor : 1
processor : 2
processor : 3
processor : 4
processor : 5
processor : 6
processor : 7

Check Online Cores

[mitesh@Matrix ~]$ cat /sys/devices/system/cpu/online
0-7

NOTE!: All cores from 0 to 7 are online.

Disable core 6 and core 7

[mitesh@Matrix ~]$ sudo sh -c "echo 0 > /sys/devices/system/cpu/cpu6/online"
[mitesh@Matrix ~]$ sudo sh -c "echo 0 > /sys/devices/system/cpu/cpu7/online"

NOTE!: You can check cpu cores using htop command or cat /sys/devices/system/cpu/online