Cinnamon has a "Multi-Core System Monitor" applet that requires the "gir1.2-gtop-2.0" package. This applet shows information about the system: processor load as a percentage, network traffic, reading/writing from the hard drive, occupied memory. Who knows how to use this?
https://cinnamon-spices.linuxmint.com/applets/view/79
https://cinnamon-spices.linuxmint.com/applets/view/88