ethtool-offload

#! /usr/bin/env bash

rxGroListFlag=false
txNocacheCopyFlag=false

if [ $# -eq 0 ]; then
    echo "[ethtool-offload] Enabling offloading on all interfaces."
    interfaces="$(ip -o link show | awk -F': ' '{print $2}' | grep -v "lo" | sed 's/@.*$//')"
else
    echo "[ethtool-offload] Enabling offloading on the following interfaces: $@."
    interfaces="$@"
fi

for i in $interfaces; do
    ethtool --offload "$i" rx on tx on sg on tso on ufo on gso on gro on lro on rxvlan on txvlan on ntuple on rxhash on rx-udp-gro-forwarding on

    echo "[ethtool-offload] Disabling tx-nocache-copy on $i..."
    if [ "$txNocacheCopyFlag" = false ]; then
        echo "[ethtool-offload] See https://enterprise-support.nvidia.com/s/article/how-to-bypass-local-cache--disable-tx-nocache-copy-x for more information."
        txNocacheCopyFlag=true
    fi
    ethtool -K "$i" "tx-nocache-copy" off

    # echo "[ethtool-offload] Disabling rx-gro-list on $i..."
    # if [ "$rxGroListFlag" = false ]; then
        # echo "[ethtool-offload] See https://tailscale.com/blog/quic-udp-throughput for more information."
        # rxGroListFlag=true
    # fi
    # ethtool -K "$i" "rx-gro-list" off
done

ethtool-offload.rules

ACTION=="add", SUBSYSTEM=="net", RUN+="/usr/local/sbin/ethtool-offload %k"