CPU usage for Dump1090-FA (RPi)

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1

Hi,

Now my feeder is up and running I’m slightly concerned that it’s running the quad core CPU at 25% pretty much permanently. Does this sound right for the current version of Dump1090-FA?

Thanks

Neil

2

It’s normal for dump1090 to take 25-40% of one core; it has some heavy lifting to do (all the demodulation DSP work is happening there, it’s crunching through around 5MB/s of sample data)

dump1090-fa does basically all of the base-band processing section of this diagram (including the bits traditionally done in hardware):
https://upload.wikimedia.org/wikipedia/commons/2/22/SDR_et_WF.svg

3

I have two dongles running on my rpi one for adsb other for Acars plus VPN server and my CPU usage is always 20% to 25% if you have only dongle running something is not good

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4

@jvcdcarlos - check out Wingedwraith’s ADSB stats. They are a lot higher than yours so the CPU will be working hard.

5

I recently changed from 1090-mutability to 1090-FA. My CPU usage went from 15% to 25%

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