linux kernel packet drop stat

dropstat.sh

#!/usr/bin/env bash

function print() {
    for nic in ${@}; do
        echo "$nic:"
        echo "  ifconfig:"
        ifconfig $nic | grep drop | sed 's/^\s\+//'
        echo "  ethtool:"
        ethtool -S $nic | grep -E '(err|drop|rx_no_dma_resources)' | grep -v ': 0$' | sed 's/^\s\+//'
        echo "  tc:"
        tc -s qdisc show dev $nic | grep -E -A 1 '\(drop.*'
    done
    echo "/proc/net/softnet_stat:"
    cat /proc/net/softnet_stat | awk '{print $2}' | tr '\n' ' '
    echo
    if which ovs-dpctl >/dev/null; then
        echo "ovs-dpctl show:"
        ovs-dpctl show
    fi
    if grep -q '^nf_conntrack ' /proc/modules; then
        echo "conntrack stat:"
        awk '{print $11,$12}' /proc/net/stat/nf_conntrack
    fi
}

if [[ $# -lt 1 ]]; then
    echo "usage: $0 eth0 eth1 ..."
    exit 1
fi

print ${@:1}