1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# 4# extended toeplitz test: test rxhash plus, optionally, either (1) rss mapping 5# from rxhash to rx queue ('-rss') or (2) rps mapping from rxhash to cpu 6# ('-rps <rps_map>') 7# 8# irq-pattern-prefix can be derived from /sys/kernel/irq/*/action, 9# which is a driver-specific encoding. 10# 11# invoke as ./toeplitz.sh (-i <iface>) -u|-t -4|-6 \ 12# [(-rss -irq_prefix <irq-pattern-prefix>)|(-rps <rps_map>)] 13 14source setup_loopback.sh 15readonly SERVER_IP4="192.168.1.200/24" 16readonly SERVER_IP6="fda8::1/64" 17readonly SERVER_MAC="aa:00:00:00:00:02" 18 19readonly CLIENT_IP4="192.168.1.100/24" 20readonly CLIENT_IP6="fda8::2/64" 21readonly CLIENT_MAC="aa:00:00:00:00:01" 22 23PORT=8000 24KEY="$(</proc/sys/net/core/netdev_rss_key)" 25TEST_RSS=false 26RPS_MAP="" 27PROTO_FLAG="" 28IP_FLAG="" 29DEV="eth0" 30 31# Return the number of rxqs among which RSS is configured to spread packets. 32# This is determined by reading the RSS indirection table using ethtool. 33get_rss_cfg_num_rxqs() { 34 echo $(ethtool -x "${DEV}" | 35 egrep [[:space:]]+[0-9]+:[[:space:]]+ | 36 cut -d: -f2- | 37 awk '{$1=$1};1' | 38 tr ' ' '\n' | 39 sort -u | 40 wc -l) 41} 42 43# Return a list of the receive irq handler cpus. 44# The list is ordered by the irqs, so first rxq-0 cpu, then rxq-1 cpu, etc. 45# Reads /sys/kernel/irq/ in order, so algorithm depends on 46# irq_{rxq-0} < irq_{rxq-1}, etc. 47get_rx_irq_cpus() { 48 CPUS="" 49 # sort so that irq 2 is read before irq 10 50 SORTED_IRQS=$(for i in /sys/kernel/irq/*; do echo $i; done | sort -V) 51 # Consider only as many queues as RSS actually uses. We assume that 52 # if RSS_CFG_NUM_RXQS=N, then RSS uses rxqs 0-(N-1). 53 RSS_CFG_NUM_RXQS=$(get_rss_cfg_num_rxqs) 54 RXQ_COUNT=0 55 56 for i in ${SORTED_IRQS} 57 do 58 [[ "${RXQ_COUNT}" -lt "${RSS_CFG_NUM_RXQS}" ]] || break 59 # lookup relevant IRQs by action name 60 [[ -e "$i/actions" ]] || continue 61 cat "$i/actions" | grep -q "${IRQ_PATTERN}" || continue 62 irqname=$(<"$i/actions") 63 64 # does the IRQ get called 65 irqcount=$(cat "$i/per_cpu_count" | tr -d '0,') 66 [[ -n "${irqcount}" ]] || continue 67 68 # lookup CPU 69 irq=$(basename "$i") 70 cpu=$(cat "/proc/irq/$irq/smp_affinity_list") 71 72 if [[ -z "${CPUS}" ]]; then 73 CPUS="${cpu}" 74 else 75 CPUS="${CPUS},${cpu}" 76 fi 77 RXQ_COUNT=$((RXQ_COUNT+1)) 78 done 79 80 echo "${CPUS}" 81} 82 83get_disable_rfs_cmd() { 84 echo "echo 0 > /proc/sys/net/core/rps_sock_flow_entries;" 85} 86 87get_set_rps_bitmaps_cmd() { 88 CMD="" 89 for i in /sys/class/net/${DEV}/queues/rx-*/rps_cpus 90 do 91 CMD="${CMD} echo $1 > ${i};" 92 done 93 94 echo "${CMD}" 95} 96 97get_disable_rps_cmd() { 98 echo "$(get_set_rps_bitmaps_cmd 0)" 99} 100 101die() { 102 echo "$1" 103 exit 1 104} 105 106check_nic_rxhash_enabled() { 107 local -r pattern="receive-hashing:\ on" 108 109 ethtool -k "${DEV}" | grep -q "${pattern}" || die "rxhash must be enabled" 110} 111 112parse_opts() { 113 local prog=$0 114 shift 1 115 116 while [[ "$1" =~ "-" ]]; do 117 if [[ "$1" = "-irq_prefix" ]]; then 118 shift 119 IRQ_PATTERN="^$1-[0-9]*$" 120 elif [[ "$1" = "-u" || "$1" = "-t" ]]; then 121 PROTO_FLAG="$1" 122 elif [[ "$1" = "-4" ]]; then 123 IP_FLAG="$1" 124 SERVER_IP="${SERVER_IP4}" 125 CLIENT_IP="${CLIENT_IP4}" 126 elif [[ "$1" = "-6" ]]; then 127 IP_FLAG="$1" 128 SERVER_IP="${SERVER_IP6}" 129 CLIENT_IP="${CLIENT_IP6}" 130 elif [[ "$1" = "-rss" ]]; then 131 TEST_RSS=true 132 elif [[ "$1" = "-rps" ]]; then 133 shift 134 RPS_MAP="$1" 135 elif [[ "$1" = "-i" ]]; then 136 shift 137 DEV="$1" 138 else 139 die "Usage: ${prog} (-i <iface>) -u|-t -4|-6 \ 140 [(-rss -irq_prefix <irq-pattern-prefix>)|(-rps <rps_map>)]" 141 fi 142 shift 143 done 144} 145 146setup() { 147 setup_loopback_environment "${DEV}" 148 149 # Set up server_ns namespace and client_ns namespace 150 setup_macvlan_ns "${DEV}" server_ns server \ 151 "${SERVER_MAC}" "${SERVER_IP}" 152 setup_macvlan_ns "${DEV}" client_ns client \ 153 "${CLIENT_MAC}" "${CLIENT_IP}" 154} 155 156cleanup() { 157 cleanup_macvlan_ns server_ns server client_ns client 158 cleanup_loopback "${DEV}" 159} 160 161parse_opts $0 $@ 162 163setup 164trap cleanup EXIT 165 166check_nic_rxhash_enabled 167 168# Actual test starts here 169if [[ "${TEST_RSS}" = true ]]; then 170 # RPS/RFS must be disabled because they move packets between cpus, 171 # which breaks the PACKET_FANOUT_CPU identification of RSS decisions. 172 eval "$(get_disable_rfs_cmd) $(get_disable_rps_cmd)" \ 173 ip netns exec server_ns ./toeplitz "${IP_FLAG}" "${PROTO_FLAG}" \ 174 -d "${PORT}" -i "${DEV}" -k "${KEY}" -T 1000 \ 175 -C "$(get_rx_irq_cpus)" -s -v & 176elif [[ ! -z "${RPS_MAP}" ]]; then 177 eval "$(get_disable_rfs_cmd) $(get_set_rps_bitmaps_cmd ${RPS_MAP})" \ 178 ip netns exec server_ns ./toeplitz "${IP_FLAG}" "${PROTO_FLAG}" \ 179 -d "${PORT}" -i "${DEV}" -k "${KEY}" -T 1000 \ 180 -r "0x${RPS_MAP}" -s -v & 181else 182 ip netns exec server_ns ./toeplitz "${IP_FLAG}" "${PROTO_FLAG}" \ 183 -d "${PORT}" -i "${DEV}" -k "${KEY}" -T 1000 -s -v & 184fi 185 186server_pid=$! 187 188ip netns exec client_ns ./toeplitz_client.sh "${PROTO_FLAG}" \ 189 "${IP_FLAG}" "${SERVER_IP%%/*}" "${PORT}" & 190 191client_pid=$! 192 193wait "${server_pid}" 194exit_code=$? 195kill -9 "${client_pid}" 196if [[ "${exit_code}" -eq 0 ]]; then 197 echo "Test Succeeded!" 198fi 199exit "${exit_code}" 200