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