RFS/RPS/XPS 自動設定する君

update_rfs.sh

#!/bin/sh
# references:
# - https://blog.yuuk.io/entry/linux-networkstack-tuning-rfs
# - https://qiita.com/saitara/items/aabb9c8869079ceb96a2
# - https://www.greptips.com/posts/1119/

set -ue

rps_sock_flow_entries=32768

for interface in /sys/class/net/eth*; do
    # RFS/RPS
    rxs=$(find "${interface}/queues" -maxdepth 1 -name 'rx-*' | wc -l)
    rps_flow_cnt=$(( rps_sock_flow_entries / rxs ))
    for qrx in "${interface}"/queues/rx-*; do
        echo "echo 'FFFF' > ${qrx}/rps_cpus"
        echo 'FFFF' > "${qrx}/rps_cpus"
        echo "echo $rps_flow_cnt > ${qrx}/rps_flow_cnt"
        echo $rps_flow_cnt > "${qrx}/rps_flow_cnt"
    done

    # XPS
    i=0
    for qtx in "${interface}"/queues/tx-*; do
        echo "echo 2^${i} | bc > ${qtx}/xps_cpus"
        echo 2^${i} | bc > "${qtx}/xps_cpus"
        i=$(( i + 1 ))
    done
done

echo 32768 > /proc/sys/net/core/rps_sock_flow_entries