[Exp] Why is the CPU usage so high when running code?

[xdobetter]

Hello, every enthusiastic project follower; I have a curious problem running an experiment. Why is the CPU usage so high when running code? Is this normal?
I just ran 1.1 Canonical NeRF Training - Progressive Low Resolution: 64x64 -> 128x128 -> 256x256 and 1.2 1.2 Canonical NeRF Training - High Resolution: 512x512 and both had these problems.

My machine configuration is as follows
Ubuntu 22.04.5 LTS
GPU A6000
CPU

Architecture:             x86_64
  CPU op-mode(s):         32-bit, 64-bit
  Address sizes:          52 bits physical, 57 bits virtual
  Byte Order:             Little Endian
CPU(s):                   112
  On-line CPU(s) list:    0-111
Vendor ID:                GenuineIntel
  Model name:             Intel(R) Xeon(R) Gold 6330 CPU @ 2.00GHz