CPU on Gmod dont work

OS Name/Version: Ubuntu 20.04 (64bit)

Product Name/Version: v2.3.4.3,

Problem Description:
If I start the server or am on it and many things spawn, the server starts to lag, which is normal, but the CPU display not changes its always zero

Steps to reproduce:

  • Step 1 Create Gmod Server
  • Step 2 Update Server
  • Step 3 Start Server an Spawn Thinks

Actions taken to resolve so far:
New Installation but dosent work