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@pchaigno

Here's the XDP features output for my interface:

$sudo tools/net/ynl/pyynl/cli.py --spec Documentation/netlink/specs/netdev.yaml --dump dev-get
{
  'ifindex': 5,
  'xdp-features': {'basic', 'ndo-xmit', 'ndo-xmit-sg', 'redirect', 'rx-sg', 'xsk-zerocopy'},
  'xdp-rx-metadata-features': set(),
  'xdp-zc-max-segs': 8,
  'xsk-features': set()
}

After downgrading the i40e driver (from Ubuntu repos), I'm seeing:

12.4M rx_missed_errors/sec
Only 2.1M rx_packets/sec

Command used:

$sudo ./ethtool_stat.pl --dev ens1f1np1
Ethtool(ens1f1np1) stat:     12466742 (     12,466,742) <= rx_missed_errors /sec
Ethtool(ens1f1np1) stat:      2177173 (      2,177,173) <= rx_packets /sec

Question: How to find Where exactly are these packets being dropped?

79639145