> Best regards
>
> Max
A small update. I disabled the ethtool ntuple rule which steers the multicast packets to a specific RX-Queue and let the program run for 2 minutes.
After 2 minutes or so I looked at the BPF map again and saw this:
$ sudo bpftool map dump id 41
key: 00 00 00 00 value: eb 00 00 00 00 00 00 00
key: 01 00 00 00 value: 6b 00 00 00 00 00 00 00
key: 02 00 00 00 value: 18 00 00 00 00 00 00 00
key: 03 00 00 00 value: 01 00 00 00 00 00 00 00
key: 04 00 00 00 value: 17 00 00 00 00 00 00 00
key: 05 00 00 00 value: 3a 00 00 00 00 00 00 00
key: 06 00 00 00 value: 65 00 00 00 00 00 00 00
key: 07 00 00 00 value: 3c 7a 89 01 00 00 00 00
key: 08 00 00 00 value: 02 00 00 00 00 00 00 00
key: 09 00 00 00 value: 12 00 00 00 00 00 00 00
key: 0a 00 00 00 value: 55 00 00 00 00 00 00 00
key: 0b 00 00 00 value: 14 00 00 00 00 00 00 00
key: 0c 00 00 00 value: 2c 00 00 00 00 00 00 00
key: 0d 00 00 00 value: 00 00 00 00 00 00 00 00
key: 0e 00 00 00 value: 1b 00 00 00 00 00 00 00
As you can see, the multicast stream is probably landing on RX-Queue 7 (unfortunately my XSK-Program is waiting for packets on RX-Queue 0) but somehow delayed for 1 or 2 minutes.
In case I enable ntuple via
ethtool -K eth5 ntuple on
and add the ethtool ntuple rule back, wait for 2 minutes again, I get this:
$ sudo bpftool map dump id 46
key: 00 00 00 00 value: 6f 16 00 00 00 00 00 00
key: 01 00 00 00 value: 43 00 00 00 00 00 00 00
key: 02 00 00 00 value: 0d 00 00 00 00 00 00 00
key: 03 00 00 00 value: 00 00 00 00 00 00 00 00
key: 04 00 00 00 value: 0e 00 00 00 00 00 00 00
key: 05 00 00 00 value: 24 00 00 00 00 00 00 00
key: 06 00 00 00 value: 34 00 00 00 00 00 00 00
key: 07 00 00 00 value: 7d 05 00 00 00 00 00 00
key: 08 00 00 00 value: 01 00 00 00 00 00 00 00
key: 09 00 00 00 value: 0a 00 00 00 00 00 00 00
key: 0a 00 00 00 value: 30 00 00 00 00 00 00 00
key: 0b 00 00 00 value: 0e 00 00 00 00 00 00 00
key: 0c 00 00 00 value: 1b 00 00 00 00 00 00 00
key: 0d 00 00 00 value: 00 00 00 00 00 00 00 00
key: 0e 00 00 00 value: 0a 00 00 00 00 00 00 00
As you can see, no indicator for a multicast stream with lots of packets :(
Something is wrong here...
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