FlightAware Discussions

HTOP, multiple entries

I’ve got a Pi Zero running PiAware and feeding FR24, also got tar1090 installed.

Now running HTOP as sudo am a wee bit confused, if I highlight ‘commands’ I have multiple entries of some programs.

Two entries for /usr/local/share/tar1090/tar1090.sh
Three entries for /usr/bin/dump1090-fa with two highlighted green and the other white
Thirteen entries for /usr/bin/fr24feed with 12 green and the one white.

All have different PIDs numbers

Appreciate this is a system issue rather than a PiAware issue but sure someone can shed light as to why multiple instances show as running, especially fr24feed with 13 and the differing colours.


Those things are green: https://en.wikipedia.org/wiki/POSIX_Threads
You can turn of their display in the htop settings.

tar1090 isn’t really running twice, it’s just multiple subshells.
Those are not green because they are real processes, but still belong to the same thing.
Press t in htop to turn on a tree view, it’ll show you what process belongs to another process.

So all this isn’t an issue, just a misunderstanding let’s say :slight_smile:

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