Mininet POX Remote controller CPU usage always 0.0 with psutil

[lorenzomonta]

Summary

• OS: { Ubuntu 20.04.2 LTS }
• Architecture: { Virtualbox 6.1 }
• VM Mininet -> https://github.com/mininet/mininet
• Psutil version: { 5.8.0 }
• Python version: { 3.8.5 }
• Type: {
  #!/urs/bin/python

import psutil, os, subprocess

pid = /find process pid/

for i in range(10000):
print(round(psutil.Process(pid).cpu_percent(interval = 0.2), 1), round(psutil.Process(pid).memory_percent(memtype="rss"), 1))
}

Description

{{{
When I run this script, I always get the same values: CPU 0.0 and Memory 0.3, why? what am I doing wrong?
thank you
}}}