I lied... WiFi 6 on the Raspberry Pi is NOT faster than Ethernet

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Jeff Geerling
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As it turns out, my benchmarking process was flawed, and I had to learn a bit about the Linux networking stack to figure out why!

Special thanks to commenter marvell marvell for pointing out the obvious, and to Javier Choclin for suggesting I try out the MZHOU adapter, which led me down this path towards enlightenment.

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Products in this video (affiliate links):

- MZHOU M.2 WiFi/Bluetooth to PCIe Adapter:
- ASUS 10G PCIe Ethernet Adapter:
- Intel WiFi 6 AX200 Desktop Kit:
- EDUP WiFi 6 PCIe Card:
- Intel I340-T4 4-port 1 Gbps Ethernet card:

Referenced in this video:

- Raspberry Pi PCI Express Card Database:
- Hannes' Stack Exchange answer:
- wpa_supplicant hook in dhcpcd source:

#RaspberryPi #ComputeModule4 #WiFi6

Contents:

00:00 - I was wrong!
01:27 - Laying out the facts
02:41 - Yay, MZHOU adapter works!
03:13 - iperf3 is weird on Linux
04:19 - Working around the problem
04:49 - Revised benchmarks
05:50 - What about wpa_supplicant?
06:33 - Use the source, Jeff!
07:48 - More exploration
08:18 - End + Bloopers

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