Multicore CPU Calculation doesn't seem to work

[flakeyy]

Bug Report

System Information

• Ubuntu 22.04.4 LTS
• AMP v2.5.1.2, built 24/07/2024 21:33 (2.5.1.2 - 20240724.5)
• Mainline

I confirm:

• [x] that I have searched for an existing bug report for this issue.
• [x] that I am using the latest available version of AMP.
• [x] that my operating system is up-to-date.

Symptoms

• What are you trying to do?
• Not use multicore CPU usage calculation.
• What are you expecting to happen?
• When not using Multicore Calculation CPU Usage to be 100% when 1 core is used, 200% when 2 are used, etc.
• What is actually happening? ('Nothing' is not an acceptable answer!)
• CPU Usage stays the same regardless of if this setting is enabled 'Core.Monitoring.UseMulticoreCPUCalc' or not.

Reproduction

• Create a Minecraft Java instance
• Limit the cores in the instance settings (requires docker)
• Enable Multicore CPU Usage Calculation in the instance configuration and restart instance
• Run the server and monitor the CPU Usage
• CPU Usage will hit but not exceed the exact percentage of cores you have set in the instance settings (2/8 core -> 25% CPU Usage max)
• Disable Multicore CPU Usage Calculation in the instance configuration and restart instance
• Run the server and monitor the CPU Usage
• CPU Usage will be the exact same as with Multicore Calculation enabled

'Ignore SMT Cores' does seem to work and affect the CPU Usage accordingly.

CPU Is Ryzen 7 5800x 8C/16T

With 2 'Container CPUs' configured and 'Ignore SMT Cores' off regardless if Multicore Calculation is on or not, the server reports maximum 12% CPU usage (2/16 = 12.5%).

[Trader08]

Same but on Debian 12 with multiple (hardware) servers and all game instances do it be it MC, RUST, SoTF, etc. One server is not using Docker while others are.