What is the threshold for top to label a process as idle With the `top` command I can toggle, whether to list idle processes or not. What is the CPU usage limit for a process to show up as idle or non-idle?

See `man top`:

> When this toggle is Off, tasks that have not used any CPU since the last update will not be displayed.

Thus the "CPU usage limit for a process to show up as idle or non-idle" is anything greater than 0.