DonutTaskManager

DonutTaskManager is a lightweight system monitor for Linux, built with GTK4
and libadwaita. It lists running processes grouped by application, and graphs
CPU, memory, disk, network and GPU use.

You can end, force kill and reprioritize processes, manage startup entries
and systemd services, and restart desktop environment components. A warning
dialog stops you from killing critical system processes by accident.

Connect the process-control interface by hand if the store has not
auto-connected it, or ending and reprioritizing processes will fail:
sudo snap connect donuttaskmanager:process-control