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

Temperature

After installing sensors you could try sensors-detect

heth@ub1:~$ sudo apt install lm-sensors
.....
heth@ub1:~$ sensors
iwlwifi_1-virtual-0
Adapter: Virtual device
temp1:        +35.0°C

pch_wildcat_point-virtual-0
Adapter: Virtual device
temp1:        +47.0°C

BAT0-acpi-0
Adapter: ACPI interface
in0:          12.72 V

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +48.0°C  (high = +105.0°C, crit = +105.0°C)
Core 0:        +48.0°C  (high = +105.0°C, crit = +105.0°C)
Core 1:        +47.0°C  (high = +105.0°C, crit = +105.0°C)

thinkpad-isa-0000
Adapter: ISA adapter
fan1:        2452 RPM
CPU:          +48.0°C
GPU:           +0.0°C
temp3:         +0.0°C
temp4:         +0.0°C
temp5:         +0.0°C
temp6:         +0.0°C
temp7:         +0.0°C
temp8:         +0.0°C

BAT1-acpi-0
Adapter: ACPI interface
in0:          10.73 V

acpitz-acpi-0
Adapter: ACPI interface
temp1:        +48.0°C  (crit = +103.0°C)