CPU linux

To temporarily shut down a CPU core, use the command echo 0 > /sys/bus/cpu/devices/cpu1/online. Repeat this command for each CPU, except for cpu0. Write "1" to enable the CPU again. =BeagleV-Ahead example"

root@BeagleV:/home/beagle# lscpu
Architecture:          riscv64
  Byte Order:          Little Endian
CPU(s):                4
  On-line CPU(s) list: 0-3
root@BeagleV:/home/beagle# echo "0" > /sys/bus/cpu/devices/cpu3/online
root@BeagleV:/home/beagle# lscpu
Architecture:           riscv64
  Byte Order:           Little Endian
CPU(s):                 4
  On-line CPU(s) list:  0-2
  Off-line CPU(s) list: 3
root@BeagleV:/home/beagle# echo "0" > /sys/bus/cpu/devices/cpu2/online
root@BeagleV:/home/beagle# echo "0" > /sys/bus/cpu/devices/cpu1/online
root@BeagleV:/home/beagle# lscpu
Architecture:           riscv64
  Byte Order:           Little Endian
CPU(s):                 4
  On-line CPU(s) list:  0
  Off-line CPU(s) list: 1-3