examples/distributor/main.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2017 Intel Corporation
   3  */
   4
   5 #include <stdint.h>
   6 #include <inttypes.h>
   7 #include <unistd.h>
   8 #include <signal.h>
   9 #include <getopt.h>
  10
  11 #include <rte_eal.h>
  12 #include <rte_ethdev.h>
  13 #include <rte_cycles.h>
  14 #include <rte_malloc.h>
  15 #include <rte_debug.h>
  16 #include <rte_prefetch.h>
  17 #include <rte_distributor.h>
  18 #include <rte_pause.h>
  19
  20 #define RX_RING_SIZE 1024
  21 #define TX_RING_SIZE 1024
  22 #define NUM_MBUFS ((64*1024)-1)
  23 #define MBUF_CACHE_SIZE 128
  24 #define BURST_SIZE 64
  25 #define SCHED_RX_RING_SZ 8192
  26 #define SCHED_TX_RING_SZ 65536
  27 #define BURST_SIZE_TX 32
  28
  29 #define RTE_LOGTYPE_DISTRAPP RTE_LOGTYPE_USER1
  30
  31 #define ANSI_COLOR_RED     "\x1b[31m"
  32 #define ANSI_COLOR_RESET   "\x1b[0m"
  33
  34 /* mask of enabled ports */
  35 static uint32_t enabled_port_mask;
  36 volatile uint8_t quit_signal;
  37 volatile uint8_t quit_signal_rx;
  38 volatile uint8_t quit_signal_dist;
  39 volatile uint8_t quit_signal_work;
  40
  41 static volatile struct app_stats {
  42         struct {
  43                 uint64_t rx_pkts;
  44                 uint64_t returned_pkts;
  45                 uint64_t enqueued_pkts;
  46                 uint64_t enqdrop_pkts;
  47         } rx __rte_cache_aligned;
  48         int pad1 __rte_cache_aligned;
  49
  50         struct {
  51                 uint64_t in_pkts;
  52                 uint64_t ret_pkts;
  53                 uint64_t sent_pkts;
  54                 uint64_t enqdrop_pkts;
  55         } dist __rte_cache_aligned;
  56         int pad2 __rte_cache_aligned;
  57
  58         struct {
  59                 uint64_t dequeue_pkts;
  60                 uint64_t tx_pkts;
  61                 uint64_t enqdrop_pkts;
  62         } tx __rte_cache_aligned;
  63         int pad3 __rte_cache_aligned;
  64
  65         uint64_t worker_pkts[64] __rte_cache_aligned;
  66
  67         int pad4 __rte_cache_aligned;
  68
  69         uint64_t worker_bursts[64][8] __rte_cache_aligned;
  70
  71         int pad5 __rte_cache_aligned;
  72
  73         uint64_t port_rx_pkts[64] __rte_cache_aligned;
  74         uint64_t port_tx_pkts[64] __rte_cache_aligned;
  75 } app_stats;
  76
  77 struct app_stats prev_app_stats;
  78
  79 static const struct rte_eth_conf port_conf_default = {
  80         .rxmode = {
  81                 .mq_mode = ETH_MQ_RX_RSS,
  82                 .max_rx_pkt_len = ETHER_MAX_LEN,
  83                 .ignore_offload_bitfield = 1,
  84         },
  85         .txmode = {
  86                 .mq_mode = ETH_MQ_TX_NONE,
  87         },
  88         .rx_adv_conf = {
  89                 .rss_conf = {
  90                         .rss_hf = ETH_RSS_IP | ETH_RSS_UDP |
  91                                 ETH_RSS_TCP | ETH_RSS_SCTP,
  92                 }
  93         },
  94 };
  95
  96 struct output_buffer {
  97         unsigned count;
  98         struct rte_mbuf *mbufs[BURST_SIZE];
  99 };
 100
 101 static void print_stats(void);
 102
 103 /*
 104  * Initialises a given port using global settings and with the rx buffers
 105  * coming from the mbuf_pool passed as parameter
 106  */
 107 static inline int
 108 port_init(uint16_t port, struct rte_mempool *mbuf_pool)
 109 {
 110         struct rte_eth_conf port_conf = port_conf_default;
 111         const uint16_t rxRings = 1, txRings = rte_lcore_count() - 1;
 112         int retval;
 113         uint16_t q;
 114         uint16_t nb_rxd = RX_RING_SIZE;
 115         uint16_t nb_txd = TX_RING_SIZE;
 116         struct rte_eth_dev_info dev_info;
 117         struct rte_eth_txconf txconf;
 118
 119         if (!rte_eth_dev_is_valid_port(port))
 120                 return -1;
 121
 122         rte_eth_dev_info_get(port, &dev_info);
 123         if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
 124                 port_conf.txmode.offloads |=
 125                         DEV_TX_OFFLOAD_MBUF_FAST_FREE;
 126
 127         retval = rte_eth_dev_configure(port, rxRings, txRings, &port_conf);
 128         if (retval != 0)
 129                 return retval;
 130
 131         retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
 132         if (retval != 0)
 133                 return retval;
 134
 135         for (q = 0; q < rxRings; q++) {
 136                 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
 137                                                 rte_eth_dev_socket_id(port),
 138                                                 NULL, mbuf_pool);
 139                 if (retval < 0)
 140                         return retval;
 141         }
 142
 143         txconf = dev_info.default_txconf;
 144         txconf.txq_flags = ETH_TXQ_FLAGS_IGNORE;
 145         txconf.offloads = port_conf.txmode.offloads;
 146         for (q = 0; q < txRings; q++) {
 147                 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
 148                                                 rte_eth_dev_socket_id(port),
 149                                                 &txconf);
 150                 if (retval < 0)
 151                         return retval;
 152         }
 153
 154         retval = rte_eth_dev_start(port);
 155         if (retval < 0)
 156                 return retval;
 157
 158         struct rte_eth_link link;
 159         rte_eth_link_get_nowait(port, &link);
 160         while (!link.link_status) {
 161                 printf("Waiting for Link up on port %"PRIu16"\n", port);
 162                 sleep(1);
 163                 rte_eth_link_get_nowait(port, &link);
 164         }
 165
 166         if (!link.link_status) {
 167                 printf("Link down on port %"PRIu16"\n", port);
 168                 return 0;
 169         }
 170
 171         struct ether_addr addr;
 172         rte_eth_macaddr_get(port, &addr);
 173         printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
 174                         " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
 175                         port,
 176                         addr.addr_bytes[0], addr.addr_bytes[1],
 177                         addr.addr_bytes[2], addr.addr_bytes[3],
 178                         addr.addr_bytes[4], addr.addr_bytes[5]);
 179
 180         rte_eth_promiscuous_enable(port);
 181
 182         return 0;
 183 }
 184
 185 struct lcore_params {
 186         unsigned worker_id;
 187         struct rte_distributor *d;
 188         struct rte_ring *rx_dist_ring;
 189         struct rte_ring *dist_tx_ring;
 190         struct rte_mempool *mem_pool;
 191 };
 192
 193 static int
 194 lcore_rx(struct lcore_params *p)
 195 {
 196         const uint16_t nb_ports = rte_eth_dev_count();
 197         const int socket_id = rte_socket_id();
 198         uint16_t port;
 199         struct rte_mbuf *bufs[BURST_SIZE*2];
 200
 201         RTE_ETH_FOREACH_DEV(port) {
 202                 /* skip ports that are not enabled */
 203                 if ((enabled_port_mask & (1 << port)) == 0)
 204                         continue;
 205
 206                 if (rte_eth_dev_socket_id(port) > 0 &&
 207                                 rte_eth_dev_socket_id(port) != socket_id)
 208                         printf("WARNING, port %u is on remote NUMA node to "
 209                                         "RX thread.\n\tPerformance will not "
 210                                         "be optimal.\n", port);
 211         }
 212
 213         printf("\nCore %u doing packet RX.\n", rte_lcore_id());
 214         port = 0;
 215         while (!quit_signal_rx) {
 216
 217                 /* skip ports that are not enabled */
 218                 if ((enabled_port_mask & (1 << port)) == 0) {
 219                         if (++port == nb_ports)
 220                                 port = 0;
 221                         continue;
 222                 }
 223                 const uint16_t nb_rx = rte_eth_rx_burst(port, 0, bufs,
 224                                 BURST_SIZE);
 225                 if (unlikely(nb_rx == 0)) {
 226                         if (++port == nb_ports)
 227                                 port = 0;
 228                         continue;
 229                 }
 230                 app_stats.rx.rx_pkts += nb_rx;
 231
 232 /*
 233  * You can run the distributor on the rx core with this code. Returned
 234  * packets are then send straight to the tx core.
 235  */
 236 #if 0
 237         rte_distributor_process(d, bufs, nb_rx);
 238         const uint16_t nb_ret = rte_distributor_returned_pktsd,
 239                         bufs, BURST_SIZE*2);
 240
 241                 app_stats.rx.returned_pkts += nb_ret;
 242                 if (unlikely(nb_ret == 0)) {
 243                         if (++port == nb_ports)
 244                                 port = 0;
 245                         continue;
 246                 }
 247
 248                 struct rte_ring *tx_ring = p->dist_tx_ring;
 249                 uint16_t sent = rte_ring_enqueue_burst(tx_ring,
 250                                 (void *)bufs, nb_ret, NULL);
 251 #else
 252                 uint16_t nb_ret = nb_rx;
 253                 /*
 254                  * Swap the following two lines if you want the rx traffic
 255                  * to go directly to tx, no distribution.
 256                  */
 257                 struct rte_ring *out_ring = p->rx_dist_ring;
 258                 /* struct rte_ring *out_ring = p->dist_tx_ring; */
 259
 260                 uint16_t sent = rte_ring_enqueue_burst(out_ring,
 261                                 (void *)bufs, nb_ret, NULL);
 262 #endif
 263
 264                 app_stats.rx.enqueued_pkts += sent;
 265                 if (unlikely(sent < nb_ret)) {
 266                         app_stats.rx.enqdrop_pkts +=  nb_ret - sent;
 267                         RTE_LOG_DP(DEBUG, DISTRAPP,
 268                                 "%s:Packet loss due to full ring\n", __func__);
 269                         while (sent < nb_ret)
 270                                 rte_pktmbuf_free(bufs[sent++]);
 271                 }
 272                 if (++port == nb_ports)
 273                         port = 0;
 274         }
 275         /* set worker & tx threads quit flag */
 276         printf("\nCore %u exiting rx task.\n", rte_lcore_id());
 277         quit_signal = 1;
 278         return 0;
 279 }
 280
 281 static inline void
 282 flush_one_port(struct output_buffer *outbuf, uint8_t outp)
 283 {
 284         unsigned int nb_tx = rte_eth_tx_burst(outp, 0,
 285                         outbuf->mbufs, outbuf->count);
 286         app_stats.tx.tx_pkts += outbuf->count;
 287
 288         if (unlikely(nb_tx < outbuf->count)) {
 289                 app_stats.tx.enqdrop_pkts +=  outbuf->count - nb_tx;
 290                 do {
 291                         rte_pktmbuf_free(outbuf->mbufs[nb_tx]);
 292                 } while (++nb_tx < outbuf->count);
 293         }
 294         outbuf->count = 0;
 295 }
 296
 297 static inline void
 298 flush_all_ports(struct output_buffer *tx_buffers)
 299 {
 300         uint16_t outp;
 301
 302         RTE_ETH_FOREACH_DEV(outp) {
 303                 /* skip ports that are not enabled */
 304                 if ((enabled_port_mask & (1 << outp)) == 0)
 305                         continue;
 306
 307                 if (tx_buffers[outp].count == 0)
 308                         continue;
 309
 310                 flush_one_port(&tx_buffers[outp], outp);
 311         }
 312 }
 313
 314
 315
 316 static int
 317 lcore_distributor(struct lcore_params *p)
 318 {
 319         struct rte_ring *in_r = p->rx_dist_ring;
 320         struct rte_ring *out_r = p->dist_tx_ring;
 321         struct rte_mbuf *bufs[BURST_SIZE * 4];
 322         struct rte_distributor *d = p->d;
 323
 324         printf("\nCore %u acting as distributor core.\n", rte_lcore_id());
 325         while (!quit_signal_dist) {
 326                 const uint16_t nb_rx = rte_ring_dequeue_burst(in_r,
 327                                 (void *)bufs, BURST_SIZE*1, NULL);
 328                 if (nb_rx) {
 329                         app_stats.dist.in_pkts += nb_rx;
 330
 331                         /* Distribute the packets */
 332                         rte_distributor_process(d, bufs, nb_rx);
 333                         /* Handle Returns */
 334                         const uint16_t nb_ret =
 335                                 rte_distributor_returned_pkts(d,
 336                                         bufs, BURST_SIZE*2);
 337
 338                         if (unlikely(nb_ret == 0))
 339                                 continue;
 340                         app_stats.dist.ret_pkts += nb_ret;
 341
 342                         uint16_t sent = rte_ring_enqueue_burst(out_r,
 343                                         (void *)bufs, nb_ret, NULL);
 344                         app_stats.dist.sent_pkts += sent;
 345                         if (unlikely(sent < nb_ret)) {
 346                                 app_stats.dist.enqdrop_pkts += nb_ret - sent;
 347                                 RTE_LOG(DEBUG, DISTRAPP,
 348                                         "%s:Packet loss due to full out ring\n",
 349                                         __func__);
 350                                 while (sent < nb_ret)
 351                                         rte_pktmbuf_free(bufs[sent++]);
 352                         }
 353                 }
 354         }
 355         printf("\nCore %u exiting distributor task.\n", rte_lcore_id());
 356         quit_signal_work = 1;
 357
 358         rte_distributor_flush(d);
 359         /* Unblock any returns so workers can exit */
 360         rte_distributor_clear_returns(d);
 361         quit_signal_rx = 1;
 362         return 0;
 363 }
 364
 365
 366 static int
 367 lcore_tx(struct rte_ring *in_r)
 368 {
 369         static struct output_buffer tx_buffers[RTE_MAX_ETHPORTS];
 370         const int socket_id = rte_socket_id();
 371         uint16_t port;
 372
 373         RTE_ETH_FOREACH_DEV(port) {
 374                 /* skip ports that are not enabled */
 375                 if ((enabled_port_mask & (1 << port)) == 0)
 376                         continue;
 377
 378                 if (rte_eth_dev_socket_id(port) > 0 &&
 379                                 rte_eth_dev_socket_id(port) != socket_id)
 380                         printf("WARNING, port %u is on remote NUMA node to "
 381                                         "TX thread.\n\tPerformance will not "
 382                                         "be optimal.\n", port);
 383         }
 384
 385         printf("\nCore %u doing packet TX.\n", rte_lcore_id());
 386         while (!quit_signal) {
 387
 388                 RTE_ETH_FOREACH_DEV(port) {
 389                         /* skip ports that are not enabled */
 390                         if ((enabled_port_mask & (1 << port)) == 0)
 391                                 continue;
 392
 393                         struct rte_mbuf *bufs[BURST_SIZE_TX];
 394                         const uint16_t nb_rx = rte_ring_dequeue_burst(in_r,
 395                                         (void *)bufs, BURST_SIZE_TX, NULL);
 396                         app_stats.tx.dequeue_pkts += nb_rx;
 397
 398                         /* if we get no traffic, flush anything we have */
 399                         if (unlikely(nb_rx == 0)) {
 400                                 flush_all_ports(tx_buffers);
 401                                 continue;
 402                         }
 403
 404                         /* for traffic we receive, queue it up for transmit */
 405                         uint16_t i;
 406                         rte_prefetch_non_temporal((void *)bufs[0]);
 407                         rte_prefetch_non_temporal((void *)bufs[1]);
 408                         rte_prefetch_non_temporal((void *)bufs[2]);
 409                         for (i = 0; i < nb_rx; i++) {
 410                                 struct output_buffer *outbuf;
 411                                 uint8_t outp;
 412                                 rte_prefetch_non_temporal((void *)bufs[i + 3]);
 413                                 /*
 414                                  * workers should update in_port to hold the
 415                                  * output port value
 416                                  */
 417                                 outp = bufs[i]->port;
 418                                 /* skip ports that are not enabled */
 419                                 if ((enabled_port_mask & (1 << outp)) == 0)
 420                                         continue;
 421
 422                                 outbuf = &tx_buffers[outp];
 423                                 outbuf->mbufs[outbuf->count++] = bufs[i];
 424                                 if (outbuf->count == BURST_SIZE_TX)
 425                                         flush_one_port(outbuf, outp);
 426                         }
 427                 }
 428         }
 429         printf("\nCore %u exiting tx task.\n", rte_lcore_id());
 430         return 0;
 431 }
 432
 433 static void
 434 int_handler(int sig_num)
 435 {
 436         printf("Exiting on signal %d\n", sig_num);
 437         /* set quit flag for rx thread to exit */
 438         quit_signal_dist = 1;
 439 }
 440
 441 static void
 442 print_stats(void)
 443 {
 444         struct rte_eth_stats eth_stats;
 445         unsigned int i, j;
 446         const unsigned int num_workers = rte_lcore_count() - 4;
 447
 448         RTE_ETH_FOREACH_DEV(i) {
 449                 rte_eth_stats_get(i, &eth_stats);
 450                 app_stats.port_rx_pkts[i] = eth_stats.ipackets;
 451                 app_stats.port_tx_pkts[i] = eth_stats.opackets;
 452         }
 453
 454         printf("\n\nRX Thread:\n");
 455         RTE_ETH_FOREACH_DEV(i) {
 456                 printf("Port %u Pktsin : %5.2f\n", i,
 457                                 (app_stats.port_rx_pkts[i] -
 458                                 prev_app_stats.port_rx_pkts[i])/1000000.0);
 459                 prev_app_stats.port_rx_pkts[i] = app_stats.port_rx_pkts[i];
 460         }
 461         printf(" - Received:    %5.2f\n",
 462                         (app_stats.rx.rx_pkts -
 463                         prev_app_stats.rx.rx_pkts)/1000000.0);
 464         printf(" - Returned:    %5.2f\n",
 465                         (app_stats.rx.returned_pkts -
 466                         prev_app_stats.rx.returned_pkts)/1000000.0);
 467         printf(" - Enqueued:    %5.2f\n",
 468                         (app_stats.rx.enqueued_pkts -
 469                         prev_app_stats.rx.enqueued_pkts)/1000000.0);
 470         printf(" - Dropped:     %s%5.2f%s\n", ANSI_COLOR_RED,
 471                         (app_stats.rx.enqdrop_pkts -
 472                         prev_app_stats.rx.enqdrop_pkts)/1000000.0,
 473                         ANSI_COLOR_RESET);
 474
 475         printf("Distributor thread:\n");
 476         printf(" - In:          %5.2f\n",
 477                         (app_stats.dist.in_pkts -
 478                         prev_app_stats.dist.in_pkts)/1000000.0);
 479         printf(" - Returned:    %5.2f\n",
 480                         (app_stats.dist.ret_pkts -
 481                         prev_app_stats.dist.ret_pkts)/1000000.0);
 482         printf(" - Sent:        %5.2f\n",
 483                         (app_stats.dist.sent_pkts -
 484                         prev_app_stats.dist.sent_pkts)/1000000.0);
 485         printf(" - Dropped      %s%5.2f%s\n", ANSI_COLOR_RED,
 486                         (app_stats.dist.enqdrop_pkts -
 487                         prev_app_stats.dist.enqdrop_pkts)/1000000.0,
 488                         ANSI_COLOR_RESET);
 489
 490         printf("TX thread:\n");
 491         printf(" - Dequeued:    %5.2f\n",
 492                         (app_stats.tx.dequeue_pkts -
 493                         prev_app_stats.tx.dequeue_pkts)/1000000.0);
 494         RTE_ETH_FOREACH_DEV(i) {
 495                 printf("Port %u Pktsout: %5.2f\n",
 496                                 i, (app_stats.port_tx_pkts[i] -
 497                                 prev_app_stats.port_tx_pkts[i])/1000000.0);
 498                 prev_app_stats.port_tx_pkts[i] = app_stats.port_tx_pkts[i];
 499         }
 500         printf(" - Transmitted: %5.2f\n",
 501                         (app_stats.tx.tx_pkts -
 502                         prev_app_stats.tx.tx_pkts)/1000000.0);
 503         printf(" - Dropped:     %s%5.2f%s\n", ANSI_COLOR_RED,
 504                         (app_stats.tx.enqdrop_pkts -
 505                         prev_app_stats.tx.enqdrop_pkts)/1000000.0,
 506                         ANSI_COLOR_RESET);
 507
 508         prev_app_stats.rx.rx_pkts = app_stats.rx.rx_pkts;
 509         prev_app_stats.rx.returned_pkts = app_stats.rx.returned_pkts;
 510         prev_app_stats.rx.enqueued_pkts = app_stats.rx.enqueued_pkts;
 511         prev_app_stats.rx.enqdrop_pkts = app_stats.rx.enqdrop_pkts;
 512         prev_app_stats.dist.in_pkts = app_stats.dist.in_pkts;
 513         prev_app_stats.dist.ret_pkts = app_stats.dist.ret_pkts;
 514         prev_app_stats.dist.sent_pkts = app_stats.dist.sent_pkts;
 515         prev_app_stats.dist.enqdrop_pkts = app_stats.dist.enqdrop_pkts;
 516         prev_app_stats.tx.dequeue_pkts = app_stats.tx.dequeue_pkts;
 517         prev_app_stats.tx.tx_pkts = app_stats.tx.tx_pkts;
 518         prev_app_stats.tx.enqdrop_pkts = app_stats.tx.enqdrop_pkts;
 519
 520         for (i = 0; i < num_workers; i++) {
 521                 printf("Worker %02u Pkts: %5.2f. Bursts(1-8): ", i,
 522                                 (app_stats.worker_pkts[i] -
 523                                 prev_app_stats.worker_pkts[i])/1000000.0);
 524                 for (j = 0; j < 8; j++) {
 525                         printf("%"PRIu64" ", app_stats.worker_bursts[i][j]);
 526                         app_stats.worker_bursts[i][j] = 0;
 527                 }
 528                 printf("\n");
 529                 prev_app_stats.worker_pkts[i] = app_stats.worker_pkts[i];
 530         }
 531 }
 532
 533 static int
 534 lcore_worker(struct lcore_params *p)
 535 {
 536         struct rte_distributor *d = p->d;
 537         const unsigned id = p->worker_id;
 538         unsigned int num = 0;
 539         unsigned int i;
 540
 541         /*
 542          * for single port, xor_val will be zero so we won't modify the output
 543          * port, otherwise we send traffic from 0 to 1, 2 to 3, and vice versa
 544          */
 545         const unsigned xor_val = (rte_eth_dev_count() > 1);
 546         struct rte_mbuf *buf[8] __rte_cache_aligned;
 547
 548         for (i = 0; i < 8; i++)
 549                 buf[i] = NULL;
 550
 551         app_stats.worker_pkts[p->worker_id] = 1;
 552
 553         printf("\nCore %u acting as worker core.\n", rte_lcore_id());
 554         while (!quit_signal_work) {
 555                 num = rte_distributor_get_pkt(d, id, buf, buf, num);
 556                 /* Do a little bit of work for each packet */
 557                 for (i = 0; i < num; i++) {
 558                         uint64_t t = rte_rdtsc()+100;
 559
 560                         while (rte_rdtsc() < t)
 561                                 rte_pause();
 562                         buf[i]->port ^= xor_val;
 563                 }
 564
 565                 app_stats.worker_pkts[p->worker_id] += num;
 566                 if (num > 0)
 567                         app_stats.worker_bursts[p->worker_id][num-1]++;
 568         }
 569         return 0;
 570 }
 571
 572 /* display usage */
 573 static void
 574 print_usage(const char *prgname)
 575 {
 576         printf("%s [EAL options] -- -p PORTMASK\n"
 577                         "  -p PORTMASK: hexadecimal bitmask of ports to configure\n",
 578                         prgname);
 579 }
 580
 581 static int
 582 parse_portmask(const char *portmask)
 583 {
 584         char *end = NULL;
 585         unsigned long pm;
 586
 587         /* parse hexadecimal string */
 588         pm = strtoul(portmask, &end, 16);
 589         if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
 590                 return -1;
 591
 592         if (pm == 0)
 593                 return -1;
 594
 595         return pm;
 596 }
 597
 598 /* Parse the argument given in the command line of the application */
 599 static int
 600 parse_args(int argc, char **argv)
 601 {
 602         int opt;
 603         char **argvopt;
 604         int option_index;
 605         char *prgname = argv[0];
 606         static struct option lgopts[] = {
 607                 {NULL, 0, 0, 0}
 608         };
 609
 610         argvopt = argv;
 611
 612         while ((opt = getopt_long(argc, argvopt, "p:",
 613                         lgopts, &option_index)) != EOF) {
 614
 615                 switch (opt) {
 616                 /* portmask */
 617                 case 'p':
 618                         enabled_port_mask = parse_portmask(optarg);
 619                         if (enabled_port_mask == 0) {
 620                                 printf("invalid portmask\n");
 621                                 print_usage(prgname);
 622                                 return -1;
 623                         }
 624                         break;
 625
 626                 default:
 627                         print_usage(prgname);
 628                         return -1;
 629                 }
 630         }
 631
 632         if (optind <= 1) {
 633                 print_usage(prgname);
 634                 return -1;
 635         }
 636
 637         argv[optind-1] = prgname;
 638
 639         optind = 1; /* reset getopt lib */
 640         return 0;
 641 }
 642
 643 /* Main function, does initialization and calls the per-lcore functions */
 644 int
 645 main(int argc, char *argv[])
 646 {
 647         struct rte_mempool *mbuf_pool;
 648         struct rte_distributor *d;
 649         struct rte_ring *dist_tx_ring;
 650         struct rte_ring *rx_dist_ring;
 651         unsigned lcore_id, worker_id = 0;
 652         unsigned nb_ports;
 653         uint16_t portid;
 654         uint16_t nb_ports_available;
 655         uint64_t t, freq;
 656
 657         /* catch ctrl-c so we can print on exit */
 658         signal(SIGINT, int_handler);
 659
 660         /* init EAL */
 661         int ret = rte_eal_init(argc, argv);
 662         if (ret < 0)
 663                 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
 664         argc -= ret;
 665         argv += ret;
 666
 667         /* parse application arguments (after the EAL ones) */
 668         ret = parse_args(argc, argv);
 669         if (ret < 0)
 670                 rte_exit(EXIT_FAILURE, "Invalid distributor parameters\n");
 671
 672         if (rte_lcore_count() < 5)
 673                 rte_exit(EXIT_FAILURE, "Error, This application needs at "
 674                                 "least 5 logical cores to run:\n"
 675                                 "1 lcore for stats (can be core 0)\n"
 676                                 "1 lcore for packet RX\n"
 677                                 "1 lcore for distribution\n"
 678                                 "1 lcore for packet TX\n"
 679                                 "and at least 1 lcore for worker threads\n");
 680
 681         nb_ports = rte_eth_dev_count();
 682         if (nb_ports == 0)
 683                 rte_exit(EXIT_FAILURE, "Error: no ethernet ports detected\n");
 684         if (nb_ports != 1 && (nb_ports & 1))
 685                 rte_exit(EXIT_FAILURE, "Error: number of ports must be even, except "
 686                                 "when using a single port\n");
 687
 688         mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
 689                 NUM_MBUFS * nb_ports, MBUF_CACHE_SIZE, 0,
 690                 RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
 691         if (mbuf_pool == NULL)
 692                 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
 693         nb_ports_available = nb_ports;
 694
 695         /* initialize all ports */
 696         RTE_ETH_FOREACH_DEV(portid) {
 697                 /* skip ports that are not enabled */
 698                 if ((enabled_port_mask & (1 << portid)) == 0) {
 699                         printf("\nSkipping disabled port %d\n", portid);
 700                         nb_ports_available--;
 701                         continue;
 702                 }
 703                 /* init port */
 704                 printf("Initializing port %u... done\n", portid);
 705
 706                 if (port_init(portid, mbuf_pool) != 0)
 707                         rte_exit(EXIT_FAILURE, "Cannot initialize port %u\n",
 708                                         portid);
 709         }
 710
 711         if (!nb_ports_available) {
 712                 rte_exit(EXIT_FAILURE,
 713                                 "All available ports are disabled. Please set portmask.\n");
 714         }
 715
 716         d = rte_distributor_create("PKT_DIST", rte_socket_id(),
 717                         rte_lcore_count() - 4,
 718                         RTE_DIST_ALG_BURST);
 719         if (d == NULL)
 720                 rte_exit(EXIT_FAILURE, "Cannot create distributor\n");
 721
 722         /*
 723          * scheduler ring is read by the transmitter core, and written to
 724          * by scheduler core
 725          */
 726         dist_tx_ring = rte_ring_create("Output_ring", SCHED_TX_RING_SZ,
 727                         rte_socket_id(), RING_F_SC_DEQ | RING_F_SP_ENQ);
 728         if (dist_tx_ring == NULL)
 729                 rte_exit(EXIT_FAILURE, "Cannot create output ring\n");
 730
 731         rx_dist_ring = rte_ring_create("Input_ring", SCHED_RX_RING_SZ,
 732                         rte_socket_id(), RING_F_SC_DEQ | RING_F_SP_ENQ);
 733         if (rx_dist_ring == NULL)
 734                 rte_exit(EXIT_FAILURE, "Cannot create output ring\n");
 735
 736         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 737                 if (worker_id == rte_lcore_count() - 3) {
 738                         printf("Starting distributor on lcore_id %d\n",
 739                                         lcore_id);
 740                         /* distributor core */
 741                         struct lcore_params *p =
 742                                         rte_malloc(NULL, sizeof(*p), 0);
 743                         if (!p)
 744                                 rte_panic("malloc failure\n");
 745                         *p = (struct lcore_params){worker_id, d,
 746                                 rx_dist_ring, dist_tx_ring, mbuf_pool};
 747                         rte_eal_remote_launch(
 748                                 (lcore_function_t *)lcore_distributor,
 749                                 p, lcore_id);
 750                 } else if (worker_id == rte_lcore_count() - 4) {
 751                         printf("Starting tx  on worker_id %d, lcore_id %d\n",
 752                                         worker_id, lcore_id);
 753                         /* tx core */
 754                         rte_eal_remote_launch((lcore_function_t *)lcore_tx,
 755                                         dist_tx_ring, lcore_id);
 756                 } else if (worker_id == rte_lcore_count() - 2) {
 757                         printf("Starting rx on worker_id %d, lcore_id %d\n",
 758                                         worker_id, lcore_id);
 759                         /* rx core */
 760                         struct lcore_params *p =
 761                                         rte_malloc(NULL, sizeof(*p), 0);
 762                         if (!p)
 763                                 rte_panic("malloc failure\n");
 764                         *p = (struct lcore_params){worker_id, d, rx_dist_ring,
 765                                         dist_tx_ring, mbuf_pool};
 766                         rte_eal_remote_launch((lcore_function_t *)lcore_rx,
 767                                         p, lcore_id);
 768                 } else {
 769                         printf("Starting worker on worker_id %d, lcore_id %d\n",
 770                                         worker_id, lcore_id);
 771                         struct lcore_params *p =
 772                                         rte_malloc(NULL, sizeof(*p), 0);
 773                         if (!p)
 774                                 rte_panic("malloc failure\n");
 775                         *p = (struct lcore_params){worker_id, d, rx_dist_ring,
 776                                         dist_tx_ring, mbuf_pool};
 777
 778                         rte_eal_remote_launch((lcore_function_t *)lcore_worker,
 779                                         p, lcore_id);
 780                 }
 781                 worker_id++;
 782         }
 783
 784         freq = rte_get_timer_hz();
 785         t = rte_rdtsc() + freq;
 786         while (!quit_signal_dist) {
 787                 if (t < rte_rdtsc()) {
 788                         print_stats();
 789                         t = rte_rdtsc() + freq;
 790                 }
 791                 usleep(1000);
 792         }
 793
 794         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 795                 if (rte_eal_wait_lcore(lcore_id) < 0)
 796                         return -1;
 797         }
 798
 799         print_stats();
 800         return 0;
 801 }