projects / linux-block.git / blame
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1 | * Texas Instruments CPSW ethernet driver |
| 2 | ||
| 3 | Multiqueue & CBS & MQPRIO | |
| 4 | ===================================================================== | |
| 5 | ===================================================================== | |
| 6 | ||
| 7 | The cpsw has 3 CBS shapers for each external ports. This document | |
| 8 | describes MQPRIO and CBS Qdisc offload configuration for cpsw driver | |
| 9 | based on examples. It potentially can be used in audio video bridging | |
| 10 | (AVB) and time sensitive networking (TSN). | |
| 11 | ||
| 12 | The following examples were tested on AM572x EVM and BBB boards. | |
| 13 | ||
| 14 | Test setup | |
| 15 | ========== | |
| 16 | ||
| 17 | Under consideration two examples with AM572x EVM running cpsw driver | |
| 18 | in dual_emac mode. | |
| 19 | ||
| 20 | Several prerequisites: | |
| 21 | - TX queues must be rated starting from txq0 that has highest priority | |
| 22 | - Traffic classes are used starting from 0, that has highest priority | |
| 23 | - CBS shapers should be used with rated queues | |
| 24 | - The bandwidth for CBS shapers has to be set a little bit more then | |
| 25 | potential incoming rate, thus, rate of all incoming tx queues has | |
| 26 | to be a little less | |
| 27 | - Real rates can differ, due to discreetness | |
| 28 | - Map skb-priority to txq is not enough, also skb-priority to l2 prio | |
| 29 | map has to be created with ip or vconfig tool | |
| 30 | - Any l2/socket prio (0 - 7) for classes can be used, but for | |
| 31 | simplicity default values are used: 3 and 2 | |
| 32 | - only 2 classes tested: A and B, but checked and can work with more, | |
| 33 | maximum allowed 4, but only for 3 rate can be set. | |
| 34 | ||
| 35 | Test setup for examples | |
| 36 | ======================= | |
| 37 | +-------------------------------+ | |
| 38 | |--+ | | |
| 39 | | | Workstation0 | | |
| 40 | |E | MAC 18:03:73:66:87:42 | | |
| 41 | +-----------------------------+ +--|t | | | |
| 42 | | | 1 | E | | |h |./tsn_listener -d \ | | |
| 43 | | Target board: | 0 | t |--+ |0 | 18:03:73:66:87:42 -i eth0 \| | |
| 44 | | AM572x EVM | 0 | h | | | -s 1500 | | |
| 45 | | | 0 | 0 | |--+ | | |
| 46 | | Only 2 classes: |Mb +---| +-------------------------------+ | |
| 47 | | class A, class B | | | |
| 48 | | | +---| +-------------------------------+ | |
| 49 | | | 1 | E | |--+ | | |
| 50 | | | 0 | t | | | Workstation1 | | |
| 51 | | | 0 | h |--+ |E | MAC 20:cf:30:85:7d:fd | | |
| 52 | | |Mb | 1 | +--|t | | | |
| 53 | +-----------------------------+ |h |./tsn_listener -d \ | | |
| 54 | |0 | 20:cf:30:85:7d:fd -i eth0 \| | |
| 55 | | | -s 1500 | | |
| 56 | |--+ | | |
| 57 | +-------------------------------+ | |
| 58 | ||
| 59 | ********************************************************************* | |
| 60 | ********************************************************************* | |
| 61 | ********************************************************************* | |
| 62 | Example 1: One port tx AVB configuration scheme for target board | |
| 63 | ---------------------------------------------------------------------- | |
| 64 | (prints and scheme for AM572x evm, applicable for single port boards) | |
| 65 | ||
| 66 | tc - traffic class | |
| 67 | txq - transmit queue | |
| 68 | p - priority | |
| 69 | f - fifo (cpsw fifo) | |
| 70 | S - shaper configured | |
| 71 | ||
| 72 | +------------------------------------------------------------------+ u | |
| 73 | | +---------------+ +---------------+ +------+ +------+ | s | |
| 74 | | | | | | | | | | | e | |
| 75 | | | App 1 | | App 2 | | Apps | | Apps | | r | |
| 76 | | | Class A | | Class B | | Rest | | Rest | | | |
| 77 | | | Eth0 | | Eth0 | | Eth0 | | Eth1 | | s | |
| 78 | | | VLAN100 | | VLAN100 | | | | | | | | p | |
| 79 | | | 40 Mb/s | | 20 Mb/s | | | | | | | | a | |
| 80 | | | SO_PRIORITY=3 | | SO_PRIORITY=2 | | | | | | | | c | |
| 81 | | | | | | | | | | | | | | | e | |
| 82 | | +---|-----------+ +---|-----------+ +---|--+ +---|--+ | | |
| 83 | +-----|------------------|------------------|--------|-------------+ | |
| 84 | +-+ +------------+ | | | |
| 85 | | | +-----------------+ +--+ | |
| 86 | | | | | | |
| 87 | +---|-------|-------------|-----------------------|----------------+ | |
| 88 | | +----+ +----+ +----+ +----+ +----+ | | |
| 89 | | | p3 | | p2 | | p1 | | p0 | | p0 | | k | |
| 90 | | \ / \ / \ / \ / \ / | e | |
| 91 | | \ / \ / \ / \ / \ / | r | |
| 92 | | \/ \/ \/ \/ \/ | n | |
| 93 | | | | | | | e | |
| 94 | | | | +-----+ | | l | |
| 95 | | | | | | | | |
| 96 | | +----+ +----+ +----+ +----+ | s | |
| 97 | | |tc0 | |tc1 | |tc2 | |tc0 | | p | |
| 98 | | \ / \ / \ / \ / | a | |
| 99 | | \ / \ / \ / \ / | c | |
| 100 | | \/ \/ \/ \/ | e | |
| 101 | | | | +-----+ | | | |
| 102 | | | | | | | | | |
| 103 | | | | | | | | | |
| 104 | | | | | | | | | |
| 105 | | +----+ +----+ +----+ +----+ +----+ | | |
| 106 | | |txq0| |txq1| |txq2| |txq3| |txq4| | | |
| 107 | | \ / \ / \ / \ / \ / | | |
| 108 | | \ / \ / \ / \ / \ / | | |
| 109 | | \/ \/ \/ \/ \/ | | |
| 110 | | +-|------|------|------|--+ +--|--------------+ | | |
| 111 | | | | | | | | Eth0.100 | | Eth1 | | | |
| 112 | +---|------|------|------|------------------------|----------------+ | |
| 113 | | | | | | | |
| 114 | p p p p | | |
| 115 | 3 2 0-1, 4-7 <- L2 priority | | |
| 116 | | | | | | | |
| 117 | | | | | | | |
| 118 | +---|------|------|------|------------------------|----------------+ | |
| 119 | | | | | | |----------+ | | |
| 120 | | +----+ +----+ +----+ +----+ +----+ | | |
| 121 | | |dma7| |dma6| |dma5| |dma4| |dma3| | | |
| 122 | | \ / \ / \ / \ / \ / | c | |
| 123 | | \S / \S / \ / \ / \ / | p | |
| 124 | | \/ \/ \/ \/ \/ | s | |
| 125 | | | | | +----- | | w | |
| 126 | | | | | | | | | |
| 127 | | | | | | | | d | |
| 128 | | +----+ +----+ +----+p p+----+ | r | |
| 129 | | | | | | | |o o| | | i | |
| 130 | | | f3 | | f2 | | f0 |r r| f0 | | v | |
| 131 | | |tc0 | |tc1 | |tc2 |t t|tc0 | | e | |
| 132 | | \CBS / \CBS / \CBS /1 2\CBS / | r | |
| 133 | | \S / \S / \ / \ / | | |
| 134 | | \/ \/ \/ \/ | | |
| 135 | +------------------------------------------------------------------+ | |
| 136 | ========================================Eth==========================> | |
| 137 | ||
| 138 | 1) | |
| 139 | // Add 4 tx queues, for interface Eth0, and 1 tx queue for Eth1 | |
| 140 | $ ethtool -L eth0 rx 1 tx 5 | |
| 141 | rx unmodified, ignoring | |
| 142 | ||
| 143 | 2) | |
| 144 | // Check if num of queues is set correctly: | |
| 145 | $ ethtool -l eth0 | |
| 146 | Channel parameters for eth0: | |
| 147 | Pre-set maximums: | |
| 148 | RX: 8 | |
| 149 | TX: 8 | |
| 150 | Other: 0 | |
| 151 | Combined: 0 | |
| 152 | Current hardware settings: | |
| 153 | RX: 1 | |
| 154 | TX: 5 | |
| 155 | Other: 0 | |
| 156 | Combined: 0 | |
| 157 | ||
| 158 | 3) | |
| 159 | // TX queues must be rated starting from 0, so set bws for tx0 and tx1 | |
| 160 | // Set rates 40 and 20 Mb/s appropriately. | |
| 161 | // Pay attention, real speed can differ a bit due to discreetness. | |
| 162 | // Leave last 2 tx queues not rated. | |
| 163 | $ echo 40 > /sys/class/net/eth0/queues/tx-0/tx_maxrate | |
| 164 | $ echo 20 > /sys/class/net/eth0/queues/tx-1/tx_maxrate | |
| 165 | ||
| 166 | 4) | |
| 167 | // Check maximum rate of tx (cpdma) queues: | |
| 168 | $ cat /sys/class/net/eth0/queues/tx-*/tx_maxrate | |
| 169 | 40 | |
| 170 | 20 | |
| 171 | 0 | |
| 172 | 0 | |
| 173 | 0 | |
| 174 | ||
| 175 | 5) | |
| 176 | // Map skb->priority to traffic class: | |
| 177 | // 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 | |
| 178 | // Map traffic class to transmit queue: | |
| 179 | // tc0 -> txq0, tc1 -> txq1, tc2 -> (txq2, txq3) | |
| 180 | $ tc qdisc replace dev eth0 handle 100: parent root mqprio num_tc 3 \ | |
| 181 | map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@2 hw 1 | |
| 182 | ||
| 183 | 5a) | |
| 184 | // As two interface sharing same set of tx queues, assign all traffic | |
| 185 | // coming to interface Eth1 to separate queue in order to not mix it | |
| 186 | // with traffic from interface Eth0, so use separate txq to send | |
| 187 | // packets to Eth1, so all prio -> tc0 and tc0 -> txq4 | |
| 188 | // Here hw 0, so here still default configuration for eth1 in hw | |
| 189 | $ tc qdisc replace dev eth1 handle 100: parent root mqprio num_tc 1 \ | |
| 190 | map 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 queues 1@4 hw 0 | |
| 191 | ||
| 192 | 6) | |
| 193 | // Check classes settings | |
| 194 | $ tc -g class show dev eth0 | |
| 195 | +---(100:ffe2) mqprio | |
| 196 | | +---(100:3) mqprio | |
| 197 | | +---(100:4) mqprio | |
| 198 | | | |
| 199 | +---(100:ffe1) mqprio | |
| 200 | | +---(100:2) mqprio | |
| 201 | | | |
| 202 | +---(100:ffe0) mqprio | |
| 203 | +---(100:1) mqprio | |
| 204 | ||
| 205 | $ tc -g class show dev eth1 | |
| 206 | +---(100:ffe0) mqprio | |
| 207 | +---(100:5) mqprio | |
| 208 | ||
| 209 | 7) | |
| 210 | // Set rate for class A - 41 Mbit (tc0, txq0) using CBS Qdisc | |
| 211 | // Set it +1 Mb for reserve (important!) | |
| 212 | // here only idle slope is important, others arg are ignored | |
| 213 | // Pay attention, real speed can differ a bit due to discreetness | |
| 214 | $ tc qdisc add dev eth0 parent 100:1 cbs locredit -1438 \ | |
| 215 | hicredit 62 sendslope -959000 idleslope 41000 offload 1 | |
| 216 | net eth0: set FIFO3 bw = 50 | |
| 217 | ||
| 218 | 8) | |
| 219 | // Set rate for class B - 21 Mbit (tc1, txq1) using CBS Qdisc: | |
| 220 | // Set it +1 Mb for reserve (important!) | |
| 221 | $ tc qdisc add dev eth0 parent 100:2 cbs locredit -1468 \ | |
| 222 | hicredit 65 sendslope -979000 idleslope 21000 offload 1 | |
| 223 | net eth0: set FIFO2 bw = 30 | |
| 224 | ||
| 225 | 9) | |
| 226 | // Create vlan 100 to map sk->priority to vlan qos | |
| 227 | $ ip link add link eth0 name eth0.100 type vlan id 100 | |
| 228 | 8021q: 802.1Q VLAN Support v1.8 | |
| 229 | 8021q: adding VLAN 0 to HW filter on device eth0 | |
| 230 | 8021q: adding VLAN 0 to HW filter on device eth1 | |
| 231 | net eth0: Adding vlanid 100 to vlan filter | |
| 232 | ||
| 233 | 10) | |
| 234 | // Map skb->priority to L2 prio, 1 to 1 | |
| 235 | $ ip link set eth0.100 type vlan \ | |
| 236 | egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 | |
| 237 | ||
| 238 | 11) | |
| 239 | // Check egress map for vlan 100 | |
| 240 | $ cat /proc/net/vlan/eth0.100 | |
| 241 | [...] | |
| 242 | INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 | |
| 243 | EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 | |
| 244 | ||
| 245 | 12) | |
| 246 | // Run your appropriate tools with socket option "SO_PRIORITY" | |
| 247 | // to 3 for class A and/or to 2 for class B | |
| 248 | // (I took at https://www.spinics.net/lists/netdev/msg460869.html) | |
| 249 | ./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p3 -s 1500& | |
| 250 | ./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p2 -s 1500& | |
| 251 | ||
| 252 | 13) | |
| 253 | // run your listener on workstation (should be in same vlan) | |
| 254 | // (I took at https://www.spinics.net/lists/netdev/msg460869.html) | |
| 255 | ./tsn_listener -d 18:03:73:66:87:42 -i enp5s0 -s 1500 | |
| 256 | Receiving data rate: 39012 kbps | |
| 257 | Receiving data rate: 39012 kbps | |
| 258 | Receiving data rate: 39012 kbps | |
| 259 | Receiving data rate: 39012 kbps | |
| 260 | Receiving data rate: 39012 kbps | |
| 261 | Receiving data rate: 39012 kbps | |
| 262 | Receiving data rate: 39012 kbps | |
| 263 | Receiving data rate: 39012 kbps | |
| 264 | Receiving data rate: 39012 kbps | |
| 265 | Receiving data rate: 39012 kbps | |
| 266 | Receiving data rate: 39012 kbps | |
| 267 | Receiving data rate: 39012 kbps | |
| 268 | Receiving data rate: 39000 kbps | |
| 269 | ||
| 270 | 14) | |
| 271 | // Restore default configuration if needed | |
| 272 | $ ip link del eth0.100 | |
| 273 | $ tc qdisc del dev eth1 root | |
| 274 | $ tc qdisc del dev eth0 root | |
| 275 | net eth0: Prev FIFO2 is shaped | |
| 276 | net eth0: set FIFO3 bw = 0 | |
| 277 | net eth0: set FIFO2 bw = 0 | |
| 278 | $ ethtool -L eth0 rx 1 tx 1 | |
| 279 | ||
| 280 | ********************************************************************* | |
| 281 | ********************************************************************* | |
| 282 | ********************************************************************* | |
| 283 | Example 2: Two port tx AVB configuration scheme for target board | |
| 284 | ---------------------------------------------------------------------- | |
| 285 | (prints and scheme for AM572x evm, for dual emac boards only) | |
| 286 | ||
| 287 | +------------------------------------------------------------------+ u | |
| 288 | | +----------+ +----------+ +------+ +----------+ +----------+ | s | |
| 289 | | | | | | | | | | | | | e | |
| 290 | | | App 1 | | App 2 | | Apps | | App 3 | | App 4 | | r | |
| 291 | | | Class A | | Class B | | Rest | | Class B | | Class A | | | |
| 292 | | | Eth0 | | Eth0 | | | | | Eth1 | | Eth1 | | s | |
| 293 | | | VLAN100 | | VLAN100 | | | | | VLAN100 | | VLAN100 | | p | |
| 294 | | | 40 Mb/s | | 20 Mb/s | | | | | 10 Mb/s | | 30 Mb/s | | a | |
| 295 | | | SO_PRI=3 | | SO_PRI=2 | | | | | SO_PRI=3 | | SO_PRI=2 | | c | |
| 296 | | | | | | | | | | | | | | | | | | e | |
| 297 | | +---|------+ +---|------+ +---|--+ +---|------+ +---|------+ | | |
| 298 | +-----|-------------|-------------|---------|-------------|--------+ | |
| 299 | +-+ +-------+ | +----------+ +----+ | |
| 300 | | | +-------+------+ | | | |
| 301 | | | | | | | | |
| 302 | +---|-------|-------------|--------------|-------------|-------|---+ | |
| 303 | | +----+ +----+ +----+ +----+ +----+ +----+ +----+ +----+ | | |
| 304 | | | p3 | | p2 | | p1 | | p0 | | p0 | | p1 | | p2 | | p3 | | k | |
| 305 | | \ / \ / \ / \ / \ / \ / \ / \ / | e | |
| 306 | | \ / \ / \ / \ / \ / \ / \ / \ / | r | |
| 307 | | \/ \/ \/ \/ \/ \/ \/ \/ | n | |
| 308 | | | | | | | | | e | |
| 309 | | | | +----+ +----+ | | | l | |
| 310 | | | | | | | | | | |
| 311 | | +----+ +----+ +----+ +----+ +----+ +----+ | s | |
| 312 | | |tc0 | |tc1 | |tc2 | |tc2 | |tc1 | |tc0 | | p | |
| 313 | | \ / \ / \ / \ / \ / \ / | a | |
| 314 | | \ / \ / \ / \ / \ / \ / | c | |
| 315 | | \/ \/ \/ \/ \/ \/ | e | |
| 316 | | | | +-----+ +-----+ | | | | |
| 317 | | | | | | | | | | | | |
| 318 | | | | | | | | | | | | |
| 319 | | | | | | E E | | | | | | |
| 320 | | +----+ +----+ +----+ +----+ t t +----+ +----+ +----+ +----+ | | |
| 321 | | |txq0| |txq1| |txq4| |txq5| h h |txq6| |txq7| |txq3| |txq2| | | |
| 322 | | \ / \ / \ / \ / 0 1 \ / \ / \ / \ / | | |
| 323 | | \ / \ / \ / \ / . . \ / \ / \ / \ / | | |
| 324 | | \/ \/ \/ \/ 1 1 \/ \/ \/ \/ | | |
| 325 | | +-|------|------|------|--+ 0 0 +-|------|------|------|--+ | | |
| 326 | | | | | | | | 0 0 | | | | | | | | |
| 327 | +---|------|------|------|---------------|------|------|------|----+ | |
| 328 | | | | | | | | | | |
| 329 | p p p p p p p p | |
| 330 | 3 2 0-1, 4-7 <-L2 pri-> 0-1, 4-7 2 3 | |
| 331 | | | | | | | | | | |
| 332 | | | | | | | | | | |
| 333 | +---|------|------|------|---------------|------|------|------|----+ | |
| 334 | | | | | | | | | | | | |
| 335 | | +----+ +----+ +----+ +----+ +----+ +----+ +----+ +----+ | | |
| 336 | | |dma7| |dma6| |dma3| |dma2| |dma1| |dma0| |dma4| |dma5| | | |
| 337 | | \ / \ / \ / \ / \ / \ / \ / \ / | c | |
| 338 | | \S / \S / \ / \ / \ / \ / \S / \S / | p | |
| 339 | | \/ \/ \/ \/ \/ \/ \/ \/ | s | |
| 340 | | | | | +----- | | | | | w | |
| 341 | | | | | | +----+ | | | | | |
| 342 | | | | | | | | | | | d | |
| 343 | | +----+ +----+ +----+p p+----+ +----+ +----+ | r | |
| 344 | | | | | | | |o o| | | | | | | i | |
| 345 | | | f3 | | f2 | | f0 |r CPSW r| f3 | | f2 | | f0 | | v | |
| 346 | | |tc0 | |tc1 | |tc2 |t t|tc0 | |tc1 | |tc2 | | e | |
| 347 | | \CBS / \CBS / \CBS /1 2\CBS / \CBS / \CBS / | r | |
| 348 | | \S / \S / \ / \S / \S / \ / | | |
| 349 | | \/ \/ \/ \/ \/ \/ | | |
| 350 | +------------------------------------------------------------------+ | |
| 351 | ========================================Eth==========================> | |
| 352 | ||
| 353 | 1) | |
| 354 | // Add 8 tx queues, for interface Eth0, but they are common, so are accessed | |
| 355 | // by two interfaces Eth0 and Eth1. | |
| 356 | $ ethtool -L eth1 rx 1 tx 8 | |
| 357 | rx unmodified, ignoring | |
| 358 | ||
| 359 | 2) | |
| 360 | // Check if num of queues is set correctly: | |
| 361 | $ ethtool -l eth0 | |
| 362 | Channel parameters for eth0: | |
| 363 | Pre-set maximums: | |
| 364 | RX: 8 | |
| 365 | TX: 8 | |
| 366 | Other: 0 | |
| 367 | Combined: 0 | |
| 368 | Current hardware settings: | |
| 369 | RX: 1 | |
| 370 | TX: 8 | |
| 371 | Other: 0 | |
| 372 | Combined: 0 | |
| 373 | ||
| 374 | 3) | |
| 375 | // TX queues must be rated starting from 0, so set bws for tx0 and tx1 for Eth0 | |
| 376 | // and for tx2 and tx3 for Eth1. That is, rates 40 and 20 Mb/s appropriately | |
| 377 | // for Eth0 and 30 and 10 Mb/s for Eth1. | |
| 378 | // Real speed can differ a bit due to discreetness | |
| 379 | // Leave last 4 tx queues as not rated | |
| 380 | $ echo 40 > /sys/class/net/eth0/queues/tx-0/tx_maxrate | |
| 381 | $ echo 20 > /sys/class/net/eth0/queues/tx-1/tx_maxrate | |
| 382 | $ echo 30 > /sys/class/net/eth1/queues/tx-2/tx_maxrate | |
| 383 | $ echo 10 > /sys/class/net/eth1/queues/tx-3/tx_maxrate | |
| 384 | ||
| 385 | 4) | |
| 386 | // Check maximum rate of tx (cpdma) queues: | |
| 387 | $ cat /sys/class/net/eth0/queues/tx-*/tx_maxrate | |
| 388 | 40 | |
| 389 | 20 | |
| 390 | 30 | |
| 391 | 10 | |
| 392 | 0 | |
| 393 | 0 | |
| 394 | 0 | |
| 395 | 0 | |
| 396 | ||
| 397 | 5) | |
| 398 | // Map skb->priority to traffic class for Eth0: | |
| 399 | // 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 | |
| 400 | // Map traffic class to transmit queue: | |
| 401 | // tc0 -> txq0, tc1 -> txq1, tc2 -> (txq4, txq5) | |
| 402 | $ tc qdisc replace dev eth0 handle 100: parent root mqprio num_tc 3 \ | |
| 403 | map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@4 hw 1 | |
| 404 | ||
| 405 | 6) | |
| 406 | // Check classes settings | |
| 407 | $ tc -g class show dev eth0 | |
| 408 | +---(100:ffe2) mqprio | |
| 409 | | +---(100:5) mqprio | |
| 410 | | +---(100:6) mqprio | |
| 411 | | | |
| 412 | +---(100:ffe1) mqprio | |
| 413 | | +---(100:2) mqprio | |
| 414 | | | |
| 415 | +---(100:ffe0) mqprio | |
| 416 | +---(100:1) mqprio | |
| 417 | ||
| 418 | 7) | |
| 419 | // Set rate for class A - 41 Mbit (tc0, txq0) using CBS Qdisc for Eth0 | |
| 420 | // here only idle slope is important, others ignored | |
| 421 | // Real speed can differ a bit due to discreetness | |
| 422 | $ tc qdisc add dev eth0 parent 100:1 cbs locredit -1470 \ | |
| 423 | hicredit 62 sendslope -959000 idleslope 41000 offload 1 | |
| 424 | net eth0: set FIFO3 bw = 50 | |
| 425 | ||
| 426 | 8) | |
| 427 | // Set rate for class B - 21 Mbit (tc1, txq1) using CBS Qdisc for Eth0 | |
| 428 | $ tc qdisc add dev eth0 parent 100:2 cbs locredit -1470 \ | |
| 429 | hicredit 65 sendslope -979000 idleslope 21000 offload 1 | |
| 430 | net eth0: set FIFO2 bw = 30 | |
| 431 | ||
| 432 | 9) | |
| 433 | // Create vlan 100 to map sk->priority to vlan qos for Eth0 | |
| 434 | $ ip link add link eth0 name eth0.100 type vlan id 100 | |
| 435 | net eth0: Adding vlanid 100 to vlan filter | |
| 436 | ||
| 437 | 10) | |
| 438 | // Map skb->priority to L2 prio for Eth0.100, one to one | |
| 439 | $ ip link set eth0.100 type vlan \ | |
| 440 | egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 | |
| 441 | ||
| 442 | 11) | |
| 443 | // Check egress map for vlan 100 | |
| 444 | $ cat /proc/net/vlan/eth0.100 | |
| 445 | [...] | |
| 446 | INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 | |
| 447 | EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 | |
| 448 | ||
| 449 | 12) | |
| 450 | // Map skb->priority to traffic class for Eth1: | |
| 451 | // 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 | |
| 452 | // Map traffic class to transmit queue: | |
| 453 | // tc0 -> txq2, tc1 -> txq3, tc2 -> (txq6, txq7) | |
| 454 | $ tc qdisc replace dev eth1 handle 100: parent root mqprio num_tc 3 \ | |
| 455 | map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@2 1@3 2@6 hw 1 | |
| 456 | ||
| 457 | 13) | |
| 458 | // Check classes settings | |
| 459 | $ tc -g class show dev eth1 | |
| 460 | +---(100:ffe2) mqprio | |
| 461 | | +---(100:7) mqprio | |
| 462 | | +---(100:8) mqprio | |
| 463 | | | |
| 464 | +---(100:ffe1) mqprio | |
| 465 | | +---(100:4) mqprio | |
| 466 | | | |
| 467 | +---(100:ffe0) mqprio | |
| 468 | +---(100:3) mqprio | |
| 469 | ||
| 470 | 14) | |
| 471 | // Set rate for class A - 31 Mbit (tc0, txq2) using CBS Qdisc for Eth1 | |
| 70fd8036 IK |
472 | // here only idle slope is important, others ignored, but calculated |
| 473 | // for interface speed - 100Mb for eth1 port. | |
| ae62372f | 474 | // Set it +1 Mb for reserve (important!) |
| 70fd8036 IK |
475 | $ tc qdisc add dev eth1 parent 100:3 cbs locredit -1035 \ |
| 476 | hicredit 465 sendslope -69000 idleslope 31000 offload 1 | |
| ae62372f IK |
477 | net eth1: set FIFO3 bw = 31 |
| 478 | ||
| 479 | 15) | |
| 480 | // Set rate for class B - 11 Mbit (tc1, txq3) using CBS Qdisc for Eth1 | |
| 481 | // Set it +1 Mb for reserve (important!) | |
| 70fd8036 IK |
482 | $ tc qdisc add dev eth1 parent 100:4 cbs locredit -1335 \ |
| 483 | hicredit 405 sendslope -89000 idleslope 11000 offload 1 | |
| ae62372f IK |
484 | net eth1: set FIFO2 bw = 11 |
| 485 | ||
| 486 | 16) | |
| 487 | // Create vlan 100 to map sk->priority to vlan qos for Eth1 | |
| 488 | $ ip link add link eth1 name eth1.100 type vlan id 100 | |
| 489 | net eth1: Adding vlanid 100 to vlan filter | |
| 490 | ||
| 491 | 17) | |
| 492 | // Map skb->priority to L2 prio for Eth1.100, one to one | |
| 493 | $ ip link set eth1.100 type vlan \ | |
| 494 | egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 | |
| 495 | ||
| 496 | 18) | |
| 497 | // Check egress map for vlan 100 | |
| 498 | $ cat /proc/net/vlan/eth1.100 | |
| 499 | [...] | |
| 500 | INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 | |
| 501 | EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 | |
| 502 | ||
| 503 | 19) | |
| 504 | // Run appropriate tools with socket option "SO_PRIORITY" to 3 | |
| 505 | // for class A and to 2 for class B. For both interfaces | |
| 506 | ./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p2 -s 1500& | |
| 507 | ./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p3 -s 1500& | |
| 508 | ./tsn_talker -d 20:cf:30:85:7d:fd -i eth1.100 -p2 -s 1500& | |
| 509 | ./tsn_talker -d 20:cf:30:85:7d:fd -i eth1.100 -p3 -s 1500& | |
| 510 | ||
| 511 | 20) | |
| 512 | // run your listener on workstation (should be in same vlan) | |
| 513 | // (I took at https://www.spinics.net/lists/netdev/msg460869.html) | |
| 514 | ./tsn_listener -d 18:03:73:66:87:42 -i enp5s0 -s 1500 | |
| 515 | Receiving data rate: 39012 kbps | |
| 516 | Receiving data rate: 39012 kbps | |
| 517 | Receiving data rate: 39012 kbps | |
| 518 | Receiving data rate: 39012 kbps | |
| 519 | Receiving data rate: 39012 kbps | |
| 520 | Receiving data rate: 39012 kbps | |
| 521 | Receiving data rate: 39012 kbps | |
| 522 | Receiving data rate: 39012 kbps | |
| 523 | Receiving data rate: 39012 kbps | |
| 524 | Receiving data rate: 39012 kbps | |
| 525 | Receiving data rate: 39012 kbps | |
| 526 | Receiving data rate: 39012 kbps | |
| 527 | Receiving data rate: 39000 kbps | |
| 528 | ||
| 529 | 21) | |
| 530 | // Restore default configuration if needed | |
| 531 | $ ip link del eth1.100 | |
| 532 | $ ip link del eth0.100 | |
| 533 | $ tc qdisc del dev eth1 root | |
| 534 | net eth1: Prev FIFO2 is shaped | |
| 535 | net eth1: set FIFO3 bw = 0 | |
| 536 | net eth1: set FIFO2 bw = 0 | |
| 537 | $ tc qdisc del dev eth0 root | |
| 538 | net eth0: Prev FIFO2 is shaped | |
| 539 | net eth0: set FIFO3 bw = 0 | |
| 540 | net eth0: set FIFO2 bw = 0 | |
| 541 | $ ethtool -L eth0 rx 1 tx 1 |