====== htop ======

''htop'' is an enhanced and more interactive ''top''. It is a terminal user iterface that shows processes memory and cpu usage. You might use this to see how busy [[:tools:rhea]] is before launching a bunch of jobs/threads or otherwise allocating a large cpu pool.

Also see `iotop`, "load average" in `uptime`, and, on rhea, http://rhea.wpic.upmc.edu/gangilia


{{:tools:pasted:20231121-094533.png?height=400px}}

===== Colors =====
The colors of CPU usage are informative.  If you see a lot of gray, disk usage is limiting processing (jobs might finish faster with fewer forks/threads).

{{:tools:pasted:20231121-093728.png}}