How can one activate these cpu’s
Moving this topic to the Jetson Nano category for the Jetson support team to see.
For generally enabling all cores, see:
To use the isolated CPUs for a dedicated task via
If you are using a TX2, the links provided by @Linuxdev would explain this.
If you’re seeing that on Nano, but sure to only consider in lshw output the CPUs with product: cpu.
You may also check sysfs:
ls -l /sys/devices/system/cpu/ cat /sys/devices/system/cpu/online