Hi,
For TX2, there is a special rule:
Cannot enable denver cores for TX2 (Jetpack 4.4 DP) - #40 by DaneLLL
You would need to manually schedule tasks to Denver cores.
For other Jetson platforms( including non-Denver cores in TX2 ), it is default policy in kernel and we don’s have private rule for it. Please check
Linux Scheduler — The Linux Kernel documentation