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