Receive Packet Steering Set

set_rps.sh

#!/bin/bash
# Enable RPS (Receive Packet Steering)
cc=$(grep -c processor /proc/cpuinfo)
end=$(((cc-32)/4))
#rpcc=$(head -c $end < /dev/zero | tr '\0' 'f')
#rpcc=$(printf "f%.0s" $(seq $end))
rsfe=32768
count=0
j1=0
j2=0
# if cpu core > 32, split cpu bits to n,00000000
MASK_FILL=""
MASK_RPS=""
MASK_FULLF="ffffffff"
MASK_ZERO="00000000"
idx=$((cc/32))
# max 64 core cpus
#if [ $cc -lt 32 ]
#then
#    rpcc=$(printf "f%.0s" $(seq $end))
#else
#    rpcc_tmp=$(printf "f%.0s" $(seq $end))
#    rpcc=$(printf "%s,%s" $rpcc_tmp $MASK_FULLF)
#fi
for ((i=1; i<=$idx; i++))
do
    MASK_FILL="${MASK_FILL},${MASK_ZERO}"
    MASK_RPS="${MASK_RPS},${MASK_FULLF}"
done

for ((i=0; i<${cc}; i++))
do
    if [ $i -lt 32 ]
    then
        affinity_tmp=$((1<<i))
        affinity=$(printf "%X" $affinity_tmp)
        [ $(($i%4)) -eq 0 ] && j1=$((j1+1))
        rpcc=$(printf "f%.0s" $(seq $j1))
    else
        c=$((i-32*idx))
        affinity_tmp=$((1<<c))
        affinity=$(printf "%X%s" $affinity_tmp $MASK_FILL)
        [ $(($c%4)) -eq 0 ] && j2=$((j2+1))
        rpcc_tmp=$(printf "f%.0s" $(seq $j2))
        rpcc=$(printf "%s%s" $rpcc_tmp $MASK_RPS)
    fi
    smplist+=($affinity)
done
echo ${smplist[@]}
sysctl -w net.core.rps_sock_flow_entries=$rsfe
q=$(ls /sys/class/net/*/queues/rx-*/rps_flow_cnt | wc -l)
for fileRfs in $(ls /sys/class/net/*/queues/rx-*/rps_flow_cnt)
do
    echo $((rsfe/q)) > $fileRfs
done
for fileRps in $(ls /sys/class/net/*/queues/rx-*/rps_cpus)
do
echo $rpcc
echo $rpcc > $fileRps
done

# for i in `netstat -i | sed '1,2d'| awk '{print $1}' | grep -v lo | grep -v bond`
for i in `ip link | grep UP |  awk -F'[: ]+' '{print $2}' | grep -v lo | grep -v bond`
do
  irqs+=(`grep $i /proc/interrupts | awk -F'[: ]+' '{print $2}'`)
done

echo ${#irqs[@]}
for (( i=0; i<${#irqs[@]}; i++ ));
do
  test -z ${smplist[$i]} && count=$((RANDOM%(cc-1)+1))
  echo ${smplist[$count]}
  echo ${smplist[$count]} > /proc/irq/${irqs[$i]}/smp_affinity
  count=$((count+1))
done

cat /sys/class/net/*/queues/rx-*/{rps_cpus,rps_flow_cnt}