examples/packet_ordering/main.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2016 Intel Corporation
   3  */
   4
   5 #include <signal.h>
   6 #include <getopt.h>
   7
   8 #include <rte_eal.h>
   9 #include <rte_common.h>
  10 #include <rte_errno.h>
  11 #include <rte_ethdev.h>
  12 #include <rte_lcore.h>
  13 #include <rte_malloc.h>
  14 #include <rte_mbuf.h>
  15 #include <rte_mempool.h>
  16 #include <rte_ring.h>
  17 #include <rte_reorder.h>
  18
  19 #define RX_DESC_PER_QUEUE 1024
  20 #define TX_DESC_PER_QUEUE 1024
  21
  22 #define MAX_PKTS_BURST 32
  23 #define REORDER_BUFFER_SIZE 8192
  24 #define MBUF_PER_POOL 65535
  25 #define MBUF_POOL_CACHE_SIZE 250
  26
  27 #define RING_SIZE 16384
  28
  29 /* Macros for printing using RTE_LOG */
  30 #define RTE_LOGTYPE_REORDERAPP          RTE_LOGTYPE_USER1
  31
  32 unsigned int portmask;
  33 unsigned int disable_reorder;
  34 unsigned int insight_worker;
  35 volatile uint8_t quit_signal;
  36
  37 static struct rte_mempool *mbuf_pool;
  38
  39 static struct rte_eth_conf port_conf_default;
  40
  41 struct worker_thread_args {
  42         struct rte_ring *ring_in;
  43         struct rte_ring *ring_out;
  44 };
  45
  46 struct send_thread_args {
  47         struct rte_ring *ring_in;
  48         struct rte_reorder_buffer *buffer;
  49 };
  50
  51 volatile struct app_stats {
  52         struct {
  53                 uint64_t rx_pkts;
  54                 uint64_t enqueue_pkts;
  55                 uint64_t enqueue_failed_pkts;
  56         } rx __rte_cache_aligned;
  57
  58         struct {
  59                 uint64_t dequeue_pkts;
  60                 uint64_t enqueue_pkts;
  61                 uint64_t enqueue_failed_pkts;
  62         } wkr __rte_cache_aligned;
  63
  64         struct {
  65                 uint64_t dequeue_pkts;
  66                 /* Too early pkts transmitted directly w/o reordering */
  67                 uint64_t early_pkts_txtd_woro;
  68                 /* Too early pkts failed from direct transmit */
  69                 uint64_t early_pkts_tx_failed_woro;
  70                 uint64_t ro_tx_pkts;
  71                 uint64_t ro_tx_failed_pkts;
  72         } tx __rte_cache_aligned;
  73 } app_stats;
  74
  75 /* per worker lcore stats */
  76 struct wkr_stats_per {
  77                 uint64_t deq_pkts;
  78                 uint64_t enq_pkts;
  79                 uint64_t enq_failed_pkts;
  80 } __rte_cache_aligned;
  81
  82 static struct wkr_stats_per wkr_stats[RTE_MAX_LCORE] = { {0} };
  83 /**
  84  * Get the last enabled lcore ID
  85  *
  86  * @return
  87  *   The last enabled lcore ID.
  88  */
  89 static unsigned int
  90 get_last_lcore_id(void)
  91 {
  92         int i;
  93
  94         for (i = RTE_MAX_LCORE - 1; i >= 0; i--)
  95                 if (rte_lcore_is_enabled(i))
  96                         return i;
  97         return 0;
  98 }
  99
 100 /**
 101  * Get the previous enabled lcore ID
 102  * @param id
 103  *  The current lcore ID
 104  * @return
 105  *   The previous enabled lcore ID or the current lcore
 106  *   ID if it is the first available core.
 107  */
 108 static unsigned int
 109 get_previous_lcore_id(unsigned int id)
 110 {
 111         int i;
 112
 113         for (i = id - 1; i >= 0; i--)
 114                 if (rte_lcore_is_enabled(i))
 115                         return i;
 116         return id;
 117 }
 118
 119 static inline void
 120 pktmbuf_free_bulk(struct rte_mbuf *mbuf_table[], unsigned n)
 121 {
 122         unsigned int i;
 123
 124         for (i = 0; i < n; i++)
 125                 rte_pktmbuf_free(mbuf_table[i]);
 126 }
 127
 128 /* display usage */
 129 static void
 130 print_usage(const char *prgname)
 131 {
 132         printf("%s [EAL options] -- -p PORTMASK\n"
 133                         "  -p PORTMASK: hexadecimal bitmask of ports to configure\n",
 134                         prgname);
 135 }
 136
 137 static int
 138 parse_portmask(const char *portmask)
 139 {
 140         unsigned long pm;
 141         char *end = NULL;
 142
 143         /* parse hexadecimal string */
 144         pm = strtoul(portmask, &end, 16);
 145         if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
 146                 return 0;
 147
 148         return pm;
 149 }
 150
 151 /* Parse the argument given in the command line of the application */
 152 static int
 153 parse_args(int argc, char **argv)
 154 {
 155         int opt;
 156         int option_index;
 157         char **argvopt;
 158         char *prgname = argv[0];
 159         static struct option lgopts[] = {
 160                 {"disable-reorder", 0, 0, 0},
 161                 {"insight-worker", 0, 0, 0},
 162                 {NULL, 0, 0, 0}
 163         };
 164
 165         argvopt = argv;
 166
 167         while ((opt = getopt_long(argc, argvopt, "p:",
 168                                         lgopts, &option_index)) != EOF) {
 169                 switch (opt) {
 170                 /* portmask */
 171                 case 'p':
 172                         portmask = parse_portmask(optarg);
 173                         if (portmask == 0) {
 174                                 printf("invalid portmask\n");
 175                                 print_usage(prgname);
 176                                 return -1;
 177                         }
 178                         break;
 179                 /* long options */
 180                 case 0:
 181                         if (!strcmp(lgopts[option_index].name, "disable-reorder")) {
 182                                 printf("reorder disabled\n");
 183                                 disable_reorder = 1;
 184                         }
 185                         if (!strcmp(lgopts[option_index].name,
 186                                                 "insight-worker")) {
 187                                 printf("print all worker statistics\n");
 188                                 insight_worker = 1;
 189                         }
 190                         break;
 191                 default:
 192                         print_usage(prgname);
 193                         return -1;
 194                 }
 195         }
 196         if (optind <= 1) {
 197                 print_usage(prgname);
 198                 return -1;
 199         }
 200
 201         argv[optind-1] = prgname;
 202         optind = 1; /* reset getopt lib */
 203         return 0;
 204 }
 205
 206 /*
 207  * Tx buffer error callback
 208  */
 209 static void
 210 flush_tx_error_callback(struct rte_mbuf **unsent, uint16_t count,
 211                 void *userdata __rte_unused) {
 212
 213         /* free the mbufs which failed from transmit */
 214         app_stats.tx.ro_tx_failed_pkts += count;
 215         RTE_LOG_DP(DEBUG, REORDERAPP, "%s:Packet loss with tx_burst\n", __func__);
 216         pktmbuf_free_bulk(unsent, count);
 217
 218 }
 219
 220 static inline int
 221 free_tx_buffers(struct rte_eth_dev_tx_buffer *tx_buffer[]) {
 222         uint16_t port_id;
 223
 224         /* initialize buffers for all ports */
 225         RTE_ETH_FOREACH_DEV(port_id) {
 226                 /* skip ports that are not enabled */
 227                 if ((portmask & (1 << port_id)) == 0)
 228                         continue;
 229
 230                 rte_free(tx_buffer[port_id]);
 231         }
 232         return 0;
 233 }
 234
 235 static inline int
 236 configure_tx_buffers(struct rte_eth_dev_tx_buffer *tx_buffer[])
 237 {
 238         uint16_t port_id;
 239         int ret;
 240
 241         /* initialize buffers for all ports */
 242         RTE_ETH_FOREACH_DEV(port_id) {
 243                 /* skip ports that are not enabled */
 244                 if ((portmask & (1 << port_id)) == 0)
 245                         continue;
 246
 247                 /* Initialize TX buffers */
 248                 tx_buffer[port_id] = rte_zmalloc_socket("tx_buffer",
 249                                 RTE_ETH_TX_BUFFER_SIZE(MAX_PKTS_BURST), 0,
 250                                 rte_eth_dev_socket_id(port_id));
 251                 if (tx_buffer[port_id] == NULL)
 252                         rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n",
 253                                  port_id);
 254
 255                 rte_eth_tx_buffer_init(tx_buffer[port_id], MAX_PKTS_BURST);
 256
 257                 ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[port_id],
 258                                 flush_tx_error_callback, NULL);
 259                 if (ret < 0)
 260                         rte_exit(EXIT_FAILURE,
 261                         "Cannot set error callback for tx buffer on port %u\n",
 262                                  port_id);
 263         }
 264         return 0;
 265 }
 266
 267 static inline int
 268 configure_eth_port(uint16_t port_id)
 269 {
 270         struct rte_ether_addr addr;
 271         const uint16_t rxRings = 1, txRings = 1;
 272         int ret;
 273         uint16_t q;
 274         uint16_t nb_rxd = RX_DESC_PER_QUEUE;
 275         uint16_t nb_txd = TX_DESC_PER_QUEUE;
 276         struct rte_eth_dev_info dev_info;
 277         struct rte_eth_txconf txconf;
 278         struct rte_eth_conf port_conf = port_conf_default;
 279
 280         if (!rte_eth_dev_is_valid_port(port_id))
 281                 return -1;
 282
 283         ret = rte_eth_dev_info_get(port_id, &dev_info);
 284         if (ret != 0) {
 285                 printf("Error during getting device (port %u) info: %s\n",
 286                                 port_id, strerror(-ret));
 287                 return ret;
 288         }
 289
 290         if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
 291                 port_conf.txmode.offloads |=
 292                         DEV_TX_OFFLOAD_MBUF_FAST_FREE;
 293         ret = rte_eth_dev_configure(port_id, rxRings, txRings, &port_conf_default);
 294         if (ret != 0)
 295                 return ret;
 296
 297         ret = rte_eth_dev_adjust_nb_rx_tx_desc(port_id, &nb_rxd, &nb_txd);
 298         if (ret != 0)
 299                 return ret;
 300
 301         for (q = 0; q < rxRings; q++) {
 302                 ret = rte_eth_rx_queue_setup(port_id, q, nb_rxd,
 303                                 rte_eth_dev_socket_id(port_id), NULL,
 304                                 mbuf_pool);
 305                 if (ret < 0)
 306                         return ret;
 307         }
 308
 309         txconf = dev_info.default_txconf;
 310         txconf.offloads = port_conf.txmode.offloads;
 311         for (q = 0; q < txRings; q++) {
 312                 ret = rte_eth_tx_queue_setup(port_id, q, nb_txd,
 313                                 rte_eth_dev_socket_id(port_id), &txconf);
 314                 if (ret < 0)
 315                         return ret;
 316         }
 317
 318         ret = rte_eth_dev_start(port_id);
 319         if (ret < 0)
 320                 return ret;
 321
 322         ret = rte_eth_macaddr_get(port_id, &addr);
 323         if (ret != 0) {
 324                 printf("Failed to get MAC address (port %u): %s\n",
 325                                 port_id, rte_strerror(-ret));
 326                 return ret;
 327         }
 328
 329         printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
 330                         " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
 331                         port_id,
 332                         addr.addr_bytes[0], addr.addr_bytes[1],
 333                         addr.addr_bytes[2], addr.addr_bytes[3],
 334                         addr.addr_bytes[4], addr.addr_bytes[5]);
 335
 336         ret = rte_eth_promiscuous_enable(port_id);
 337         if (ret != 0)
 338                 return ret;
 339
 340         return 0;
 341 }
 342
 343 static void
 344 print_stats(void)
 345 {
 346         uint16_t i;
 347         struct rte_eth_stats eth_stats;
 348         unsigned int lcore_id, last_lcore_id, master_lcore_id, end_w_lcore_id;
 349
 350         last_lcore_id   = get_last_lcore_id();
 351         master_lcore_id = rte_get_master_lcore();
 352         end_w_lcore_id  = get_previous_lcore_id(last_lcore_id);
 353
 354         printf("\nRX thread stats:\n");
 355         printf(" - Pkts rxd:                            %"PRIu64"\n",
 356                                                 app_stats.rx.rx_pkts);
 357         printf(" - Pkts enqd to workers ring:           %"PRIu64"\n",
 358                                                 app_stats.rx.enqueue_pkts);
 359
 360         for (lcore_id = 0; lcore_id <= end_w_lcore_id; lcore_id++) {
 361                 if (insight_worker
 362                         && rte_lcore_is_enabled(lcore_id)
 363                         && lcore_id != master_lcore_id) {
 364                         printf("\nWorker thread stats on core [%u]:\n",
 365                                         lcore_id);
 366                         printf(" - Pkts deqd from workers ring:         %"PRIu64"\n",
 367                                         wkr_stats[lcore_id].deq_pkts);
 368                         printf(" - Pkts enqd to tx ring:                %"PRIu64"\n",
 369                                         wkr_stats[lcore_id].enq_pkts);
 370                         printf(" - Pkts enq to tx failed:               %"PRIu64"\n",
 371                                         wkr_stats[lcore_id].enq_failed_pkts);
 372                 }
 373
 374                 app_stats.wkr.dequeue_pkts += wkr_stats[lcore_id].deq_pkts;
 375                 app_stats.wkr.enqueue_pkts += wkr_stats[lcore_id].enq_pkts;
 376                 app_stats.wkr.enqueue_failed_pkts +=
 377                         wkr_stats[lcore_id].enq_failed_pkts;
 378         }
 379
 380         printf("\nWorker thread stats:\n");
 381         printf(" - Pkts deqd from workers ring:         %"PRIu64"\n",
 382                                                 app_stats.wkr.dequeue_pkts);
 383         printf(" - Pkts enqd to tx ring:                %"PRIu64"\n",
 384                                                 app_stats.wkr.enqueue_pkts);
 385         printf(" - Pkts enq to tx failed:               %"PRIu64"\n",
 386                                                 app_stats.wkr.enqueue_failed_pkts);
 387
 388         printf("\nTX stats:\n");
 389         printf(" - Pkts deqd from tx ring:              %"PRIu64"\n",
 390                                                 app_stats.tx.dequeue_pkts);
 391         printf(" - Ro Pkts transmitted:                 %"PRIu64"\n",
 392                                                 app_stats.tx.ro_tx_pkts);
 393         printf(" - Ro Pkts tx failed:                   %"PRIu64"\n",
 394                                                 app_stats.tx.ro_tx_failed_pkts);
 395         printf(" - Pkts transmitted w/o reorder:        %"PRIu64"\n",
 396                                                 app_stats.tx.early_pkts_txtd_woro);
 397         printf(" - Pkts tx failed w/o reorder:          %"PRIu64"\n",
 398                                                 app_stats.tx.early_pkts_tx_failed_woro);
 399
 400         RTE_ETH_FOREACH_DEV(i) {
 401                 rte_eth_stats_get(i, &eth_stats);
 402                 printf("\nPort %u stats:\n", i);
 403                 printf(" - Pkts in:   %"PRIu64"\n", eth_stats.ipackets);
 404                 printf(" - Pkts out:  %"PRIu64"\n", eth_stats.opackets);
 405                 printf(" - In Errs:   %"PRIu64"\n", eth_stats.ierrors);
 406                 printf(" - Out Errs:  %"PRIu64"\n", eth_stats.oerrors);
 407                 printf(" - Mbuf Errs: %"PRIu64"\n", eth_stats.rx_nombuf);
 408         }
 409 }
 410
 411 static void
 412 int_handler(int sig_num)
 413 {
 414         printf("Exiting on signal %d\n", sig_num);
 415         quit_signal = 1;
 416 }
 417
 418 /**
 419  * This thread receives mbufs from the port and affects them an internal
 420  * sequence number to keep track of their order of arrival through an
 421  * mbuf structure.
 422  * The mbufs are then passed to the worker threads via the rx_to_workers
 423  * ring.
 424  */
 425 static int
 426 rx_thread(struct rte_ring *ring_out)
 427 {
 428         uint32_t seqn = 0;
 429         uint16_t i, ret = 0;
 430         uint16_t nb_rx_pkts;
 431         uint16_t port_id;
 432         struct rte_mbuf *pkts[MAX_PKTS_BURST];
 433
 434         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 435                                                         rte_lcore_id());
 436
 437         while (!quit_signal) {
 438
 439                 RTE_ETH_FOREACH_DEV(port_id) {
 440                         if ((portmask & (1 << port_id)) != 0) {
 441
 442                                 /* receive packets */
 443                                 nb_rx_pkts = rte_eth_rx_burst(port_id, 0,
 444                                                                 pkts, MAX_PKTS_BURST);
 445                                 if (nb_rx_pkts == 0) {
 446                                         RTE_LOG_DP(DEBUG, REORDERAPP,
 447                                         "%s():Received zero packets\n", __func__);
 448                                         continue;
 449                                 }
 450                                 app_stats.rx.rx_pkts += nb_rx_pkts;
 451
 452                                 /* mark sequence number */
 453                                 for (i = 0; i < nb_rx_pkts; )
 454                                         pkts[i++]->seqn = seqn++;
 455
 456                                 /* enqueue to rx_to_workers ring */
 457                                 ret = rte_ring_enqueue_burst(ring_out,
 458                                                 (void *)pkts, nb_rx_pkts, NULL);
 459                                 app_stats.rx.enqueue_pkts += ret;
 460                                 if (unlikely(ret < nb_rx_pkts)) {
 461                                         app_stats.rx.enqueue_failed_pkts +=
 462                                                                         (nb_rx_pkts-ret);
 463                                         pktmbuf_free_bulk(&pkts[ret], nb_rx_pkts - ret);
 464                                 }
 465                         }
 466                 }
 467         }
 468         return 0;
 469 }
 470
 471 /**
 472  * This thread takes bursts of packets from the rx_to_workers ring and
 473  * Changes the input port value to output port value. And feds it to
 474  * workers_to_tx
 475  */
 476 static int
 477 worker_thread(void *args_ptr)
 478 {
 479         const uint16_t nb_ports = rte_eth_dev_count_avail();
 480         uint16_t i, ret = 0;
 481         uint16_t burst_size = 0;
 482         struct worker_thread_args *args;
 483         struct rte_mbuf *burst_buffer[MAX_PKTS_BURST] = { NULL };
 484         struct rte_ring *ring_in, *ring_out;
 485         const unsigned xor_val = (nb_ports > 1);
 486         unsigned int core_id = rte_lcore_id();
 487
 488         args = (struct worker_thread_args *) args_ptr;
 489         ring_in  = args->ring_in;
 490         ring_out = args->ring_out;
 491
 492         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 493                                                         core_id);
 494
 495         while (!quit_signal) {
 496
 497                 /* dequeue the mbufs from rx_to_workers ring */
 498                 burst_size = rte_ring_dequeue_burst(ring_in,
 499                                 (void *)burst_buffer, MAX_PKTS_BURST, NULL);
 500                 if (unlikely(burst_size == 0))
 501                         continue;
 502
 503                 wkr_stats[core_id].deq_pkts += burst_size;
 504
 505                 /* just do some operation on mbuf */
 506                 for (i = 0; i < burst_size;)
 507                         burst_buffer[i++]->port ^= xor_val;
 508
 509                 /* enqueue the modified mbufs to workers_to_tx ring */
 510                 ret = rte_ring_enqueue_burst(ring_out, (void *)burst_buffer,
 511                                 burst_size, NULL);
 512                 wkr_stats[core_id].enq_pkts += ret;
 513                 if (unlikely(ret < burst_size)) {
 514                         /* Return the mbufs to their respective pool, dropping packets */
 515                         wkr_stats[core_id].enq_failed_pkts += burst_size - ret;
 516                         pktmbuf_free_bulk(&burst_buffer[ret], burst_size - ret);
 517                 }
 518         }
 519         return 0;
 520 }
 521
 522 /**
 523  * Dequeue mbufs from the workers_to_tx ring and reorder them before
 524  * transmitting.
 525  */
 526 static int
 527 send_thread(struct send_thread_args *args)
 528 {
 529         int ret;
 530         unsigned int i, dret;
 531         uint16_t nb_dq_mbufs;
 532         uint8_t outp;
 533         unsigned sent;
 534         struct rte_mbuf *mbufs[MAX_PKTS_BURST];
 535         struct rte_mbuf *rombufs[MAX_PKTS_BURST] = {NULL};
 536         static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
 537
 538         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__, rte_lcore_id());
 539
 540         configure_tx_buffers(tx_buffer);
 541
 542         while (!quit_signal) {
 543
 544                 /* deque the mbufs from workers_to_tx ring */
 545                 nb_dq_mbufs = rte_ring_dequeue_burst(args->ring_in,
 546                                 (void *)mbufs, MAX_PKTS_BURST, NULL);
 547
 548                 if (unlikely(nb_dq_mbufs == 0))
 549                         continue;
 550
 551                 app_stats.tx.dequeue_pkts += nb_dq_mbufs;
 552
 553                 for (i = 0; i < nb_dq_mbufs; i++) {
 554                         /* send dequeued mbufs for reordering */
 555                         ret = rte_reorder_insert(args->buffer, mbufs[i]);
 556
 557                         if (ret == -1 && rte_errno == ERANGE) {
 558                                 /* Too early pkts should be transmitted out directly */
 559                                 RTE_LOG_DP(DEBUG, REORDERAPP,
 560                                                 "%s():Cannot reorder early packet "
 561                                                 "direct enqueuing to TX\n", __func__);
 562                                 outp = mbufs[i]->port;
 563                                 if ((portmask & (1 << outp)) == 0) {
 564                                         rte_pktmbuf_free(mbufs[i]);
 565                                         continue;
 566                                 }
 567                                 if (rte_eth_tx_burst(outp, 0, (void *)mbufs[i], 1) != 1) {
 568                                         rte_pktmbuf_free(mbufs[i]);
 569                                         app_stats.tx.early_pkts_tx_failed_woro++;
 570                                 } else
 571                                         app_stats.tx.early_pkts_txtd_woro++;
 572                         } else if (ret == -1 && rte_errno == ENOSPC) {
 573                                 /**
 574                                  * Early pkts just outside of window should be dropped
 575                                  */
 576                                 rte_pktmbuf_free(mbufs[i]);
 577                         }
 578                 }
 579
 580                 /*
 581                  * drain MAX_PKTS_BURST of reordered
 582                  * mbufs for transmit
 583                  */
 584                 dret = rte_reorder_drain(args->buffer, rombufs, MAX_PKTS_BURST);
 585                 for (i = 0; i < dret; i++) {
 586
 587                         struct rte_eth_dev_tx_buffer *outbuf;
 588                         uint8_t outp1;
 589
 590                         outp1 = rombufs[i]->port;
 591                         /* skip ports that are not enabled */
 592                         if ((portmask & (1 << outp1)) == 0) {
 593                                 rte_pktmbuf_free(rombufs[i]);
 594                                 continue;
 595                         }
 596
 597                         outbuf = tx_buffer[outp1];
 598                         sent = rte_eth_tx_buffer(outp1, 0, outbuf, rombufs[i]);
 599                         if (sent)
 600                                 app_stats.tx.ro_tx_pkts += sent;
 601                 }
 602         }
 603
 604         free_tx_buffers(tx_buffer);
 605
 606         return 0;
 607 }
 608
 609 /**
 610  * Dequeue mbufs from the workers_to_tx ring and transmit them
 611  */
 612 static int
 613 tx_thread(struct rte_ring *ring_in)
 614 {
 615         uint32_t i, dqnum;
 616         uint8_t outp;
 617         unsigned sent;
 618         struct rte_mbuf *mbufs[MAX_PKTS_BURST];
 619         struct rte_eth_dev_tx_buffer *outbuf;
 620         static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
 621
 622         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 623                                                         rte_lcore_id());
 624
 625         configure_tx_buffers(tx_buffer);
 626
 627         while (!quit_signal) {
 628
 629                 /* deque the mbufs from workers_to_tx ring */
 630                 dqnum = rte_ring_dequeue_burst(ring_in,
 631                                 (void *)mbufs, MAX_PKTS_BURST, NULL);
 632
 633                 if (unlikely(dqnum == 0))
 634                         continue;
 635
 636                 app_stats.tx.dequeue_pkts += dqnum;
 637
 638                 for (i = 0; i < dqnum; i++) {
 639                         outp = mbufs[i]->port;
 640                         /* skip ports that are not enabled */
 641                         if ((portmask & (1 << outp)) == 0) {
 642                                 rte_pktmbuf_free(mbufs[i]);
 643                                 continue;
 644                         }
 645
 646                         outbuf = tx_buffer[outp];
 647                         sent = rte_eth_tx_buffer(outp, 0, outbuf, mbufs[i]);
 648                         if (sent)
 649                                 app_stats.tx.ro_tx_pkts += sent;
 650                 }
 651         }
 652
 653         return 0;
 654 }
 655
 656 int
 657 main(int argc, char **argv)
 658 {
 659         int ret;
 660         unsigned nb_ports;
 661         unsigned int lcore_id, last_lcore_id, master_lcore_id;
 662         uint16_t port_id;
 663         uint16_t nb_ports_available;
 664         struct worker_thread_args worker_args = {NULL, NULL};
 665         struct send_thread_args send_args = {NULL, NULL};
 666         struct rte_ring *rx_to_workers;
 667         struct rte_ring *workers_to_tx;
 668
 669         /* catch ctrl-c so we can print on exit */
 670         signal(SIGINT, int_handler);
 671
 672         /* Initialize EAL */
 673         ret = rte_eal_init(argc, argv);
 674         if (ret < 0)
 675                 rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
 676
 677         argc -= ret;
 678         argv += ret;
 679
 680         /* Parse the application specific arguments */
 681         ret = parse_args(argc, argv);
 682         if (ret < 0)
 683                 rte_exit(EXIT_FAILURE, "Invalid packet_ordering arguments\n");
 684
 685         /* Check if we have enought cores */
 686         if (rte_lcore_count() < 3)
 687                 rte_exit(EXIT_FAILURE, "Error, This application needs at "
 688                                 "least 3 logical cores to run:\n"
 689                                 "1 lcore for packet RX\n"
 690                                 "1 lcore for packet TX\n"
 691                                 "and at least 1 lcore for worker threads\n");
 692
 693         nb_ports = rte_eth_dev_count_avail();
 694         if (nb_ports == 0)
 695                 rte_exit(EXIT_FAILURE, "Error: no ethernet ports detected\n");
 696         if (nb_ports != 1 && (nb_ports & 1))
 697                 rte_exit(EXIT_FAILURE, "Error: number of ports must be even, except "
 698                                 "when using a single port\n");
 699
 700         mbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", MBUF_PER_POOL,
 701                         MBUF_POOL_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE,
 702                         rte_socket_id());
 703         if (mbuf_pool == NULL)
 704                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 705
 706         nb_ports_available = nb_ports;
 707
 708         /* initialize all ports */
 709         RTE_ETH_FOREACH_DEV(port_id) {
 710                 /* skip ports that are not enabled */
 711                 if ((portmask & (1 << port_id)) == 0) {
 712                         printf("\nSkipping disabled port %d\n", port_id);
 713                         nb_ports_available--;
 714                         continue;
 715                 }
 716                 /* init port */
 717                 printf("Initializing port %u... done\n", port_id);
 718
 719                 if (configure_eth_port(port_id) != 0)
 720                         rte_exit(EXIT_FAILURE, "Cannot initialize port %"PRIu8"\n",
 721                                         port_id);
 722         }
 723
 724         if (!nb_ports_available) {
 725                 rte_exit(EXIT_FAILURE,
 726                         "All available ports are disabled. Please set portmask.\n");
 727         }
 728
 729         /* Create rings for inter core communication */
 730         rx_to_workers = rte_ring_create("rx_to_workers", RING_SIZE, rte_socket_id(),
 731                         RING_F_SP_ENQ);
 732         if (rx_to_workers == NULL)
 733                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 734
 735         workers_to_tx = rte_ring_create("workers_to_tx", RING_SIZE, rte_socket_id(),
 736                         RING_F_SC_DEQ);
 737         if (workers_to_tx == NULL)
 738                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 739
 740         if (!disable_reorder) {
 741                 send_args.buffer = rte_reorder_create("PKT_RO", rte_socket_id(),
 742                                 REORDER_BUFFER_SIZE);
 743                 if (send_args.buffer == NULL)
 744                         rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 745         }
 746
 747         last_lcore_id   = get_last_lcore_id();
 748         master_lcore_id = rte_get_master_lcore();
 749
 750         worker_args.ring_in  = rx_to_workers;
 751         worker_args.ring_out = workers_to_tx;
 752
 753         /* Start worker_thread() on all the available slave cores but the last 1 */
 754         for (lcore_id = 0; lcore_id <= get_previous_lcore_id(last_lcore_id); lcore_id++)
 755                 if (rte_lcore_is_enabled(lcore_id) && lcore_id != master_lcore_id)
 756                         rte_eal_remote_launch(worker_thread, (void *)&worker_args,
 757                                         lcore_id);
 758
 759         if (disable_reorder) {
 760                 /* Start tx_thread() on the last slave core */
 761                 rte_eal_remote_launch((lcore_function_t *)tx_thread, workers_to_tx,
 762                                 last_lcore_id);
 763         } else {
 764                 send_args.ring_in = workers_to_tx;
 765                 /* Start send_thread() on the last slave core */
 766                 rte_eal_remote_launch((lcore_function_t *)send_thread,
 767                                 (void *)&send_args, last_lcore_id);
 768         }
 769
 770         /* Start rx_thread() on the master core */
 771         rx_thread(rx_to_workers);
 772
 773         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 774                 if (rte_eal_wait_lcore(lcore_id) < 0)
 775                         return -1;
 776         }
 777
 778         print_stats();
 779         return 0;
 780 }