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         ret = rte_eth_dev_info_get(port_id, &dev_info);
 287         if (ret != 0) {
 288                 printf("Error during getting device (port %u) info: %s\n",
 289                                 port_id, strerror(-ret));
 290                 return ret;
 291         }
 292
 293         if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
 294                 port_conf.txmode.offloads |=
 295                         DEV_TX_OFFLOAD_MBUF_FAST_FREE;
 296         ret = rte_eth_dev_configure(port_id, rxRings, txRings, &port_conf_default);
 297         if (ret != 0)
 298                 return ret;
 299
 300         ret = rte_eth_dev_adjust_nb_rx_tx_desc(port_id, &nb_rxd, &nb_txd);
 301         if (ret != 0)
 302                 return ret;
 303
 304         for (q = 0; q < rxRings; q++) {
 305                 ret = rte_eth_rx_queue_setup(port_id, q, nb_rxd,
 306                                 rte_eth_dev_socket_id(port_id), NULL,
 307                                 mbuf_pool);
 308                 if (ret < 0)
 309                         return ret;
 310         }
 311
 312         txconf = dev_info.default_txconf;
 313         txconf.offloads = port_conf.txmode.offloads;
 314         for (q = 0; q < txRings; q++) {
 315                 ret = rte_eth_tx_queue_setup(port_id, q, nb_txd,
 316                                 rte_eth_dev_socket_id(port_id), &txconf);
 317                 if (ret < 0)
 318                         return ret;
 319         }
 320
 321         ret = rte_eth_dev_start(port_id);
 322         if (ret < 0)
 323                 return ret;
 324
 325         rte_eth_macaddr_get(port_id, &addr);
 326         printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
 327                         " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
 328                         port_id,
 329                         addr.addr_bytes[0], addr.addr_bytes[1],
 330                         addr.addr_bytes[2], addr.addr_bytes[3],
 331                         addr.addr_bytes[4], addr.addr_bytes[5]);
 332
 333         ret = rte_eth_promiscuous_enable(port_id);
 334         if (ret != 0)
 335                 return ret;
 336
 337         return 0;
 338 }
 339
 340 static void
 341 print_stats(void)
 342 {
 343         uint16_t i;
 344         struct rte_eth_stats eth_stats;
 345         unsigned int lcore_id, last_lcore_id, master_lcore_id, end_w_lcore_id;
 346
 347         last_lcore_id   = get_last_lcore_id();
 348         master_lcore_id = rte_get_master_lcore();
 349         end_w_lcore_id  = get_previous_lcore_id(last_lcore_id);
 350
 351         printf("\nRX thread stats:\n");
 352         printf(" - Pkts rxd:                            %"PRIu64"\n",
 353                                                 app_stats.rx.rx_pkts);
 354         printf(" - Pkts enqd to workers ring:           %"PRIu64"\n",
 355                                                 app_stats.rx.enqueue_pkts);
 356
 357         for (lcore_id = 0; lcore_id <= end_w_lcore_id; lcore_id++) {
 358                 if (insight_worker
 359                         && rte_lcore_is_enabled(lcore_id)
 360                         && lcore_id != master_lcore_id) {
 361                         printf("\nWorker thread stats on core [%u]:\n",
 362                                         lcore_id);
 363                         printf(" - Pkts deqd from workers ring:         %"PRIu64"\n",
 364                                         wkr_stats[lcore_id].deq_pkts);
 365                         printf(" - Pkts enqd to tx ring:                %"PRIu64"\n",
 366                                         wkr_stats[lcore_id].enq_pkts);
 367                         printf(" - Pkts enq to tx failed:               %"PRIu64"\n",
 368                                         wkr_stats[lcore_id].enq_failed_pkts);
 369                 }
 370
 371                 app_stats.wkr.dequeue_pkts += wkr_stats[lcore_id].deq_pkts;
 372                 app_stats.wkr.enqueue_pkts += wkr_stats[lcore_id].enq_pkts;
 373                 app_stats.wkr.enqueue_failed_pkts +=
 374                         wkr_stats[lcore_id].enq_failed_pkts;
 375         }
 376
 377         printf("\nWorker thread stats:\n");
 378         printf(" - Pkts deqd from workers ring:         %"PRIu64"\n",
 379                                                 app_stats.wkr.dequeue_pkts);
 380         printf(" - Pkts enqd to tx ring:                %"PRIu64"\n",
 381                                                 app_stats.wkr.enqueue_pkts);
 382         printf(" - Pkts enq to tx failed:               %"PRIu64"\n",
 383                                                 app_stats.wkr.enqueue_failed_pkts);
 384
 385         printf("\nTX stats:\n");
 386         printf(" - Pkts deqd from tx ring:              %"PRIu64"\n",
 387                                                 app_stats.tx.dequeue_pkts);
 388         printf(" - Ro Pkts transmitted:                 %"PRIu64"\n",
 389                                                 app_stats.tx.ro_tx_pkts);
 390         printf(" - Ro Pkts tx failed:                   %"PRIu64"\n",
 391                                                 app_stats.tx.ro_tx_failed_pkts);
 392         printf(" - Pkts transmitted w/o reorder:        %"PRIu64"\n",
 393                                                 app_stats.tx.early_pkts_txtd_woro);
 394         printf(" - Pkts tx failed w/o reorder:          %"PRIu64"\n",
 395                                                 app_stats.tx.early_pkts_tx_failed_woro);
 396
 397         RTE_ETH_FOREACH_DEV(i) {
 398                 rte_eth_stats_get(i, &eth_stats);
 399                 printf("\nPort %u stats:\n", i);
 400                 printf(" - Pkts in:   %"PRIu64"\n", eth_stats.ipackets);
 401                 printf(" - Pkts out:  %"PRIu64"\n", eth_stats.opackets);
 402                 printf(" - In Errs:   %"PRIu64"\n", eth_stats.ierrors);
 403                 printf(" - Out Errs:  %"PRIu64"\n", eth_stats.oerrors);
 404                 printf(" - Mbuf Errs: %"PRIu64"\n", eth_stats.rx_nombuf);
 405         }
 406 }
 407
 408 static void
 409 int_handler(int sig_num)
 410 {
 411         printf("Exiting on signal %d\n", sig_num);
 412         quit_signal = 1;
 413 }
 414
 415 /**
 416  * This thread receives mbufs from the port and affects them an internal
 417  * sequence number to keep track of their order of arrival through an
 418  * mbuf structure.
 419  * The mbufs are then passed to the worker threads via the rx_to_workers
 420  * ring.
 421  */
 422 static int
 423 rx_thread(struct rte_ring *ring_out)
 424 {
 425         uint32_t seqn = 0;
 426         uint16_t i, ret = 0;
 427         uint16_t nb_rx_pkts;
 428         uint16_t port_id;
 429         struct rte_mbuf *pkts[MAX_PKTS_BURST];
 430
 431         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 432                                                         rte_lcore_id());
 433
 434         while (!quit_signal) {
 435
 436                 RTE_ETH_FOREACH_DEV(port_id) {
 437                         if ((portmask & (1 << port_id)) != 0) {
 438
 439                                 /* receive packets */
 440                                 nb_rx_pkts = rte_eth_rx_burst(port_id, 0,
 441                                                                 pkts, MAX_PKTS_BURST);
 442                                 if (nb_rx_pkts == 0) {
 443                                         RTE_LOG_DP(DEBUG, REORDERAPP,
 444                                         "%s():Received zero packets\n", __func__);
 445                                         continue;
 446                                 }
 447                                 app_stats.rx.rx_pkts += nb_rx_pkts;
 448
 449                                 /* mark sequence number */
 450                                 for (i = 0; i < nb_rx_pkts; )
 451                                         pkts[i++]->seqn = seqn++;
 452
 453                                 /* enqueue to rx_to_workers ring */
 454                                 ret = rte_ring_enqueue_burst(ring_out,
 455                                                 (void *)pkts, nb_rx_pkts, NULL);
 456                                 app_stats.rx.enqueue_pkts += ret;
 457                                 if (unlikely(ret < nb_rx_pkts)) {
 458                                         app_stats.rx.enqueue_failed_pkts +=
 459                                                                         (nb_rx_pkts-ret);
 460                                         pktmbuf_free_bulk(&pkts[ret], nb_rx_pkts - ret);
 461                                 }
 462                         }
 463                 }
 464         }
 465         return 0;
 466 }
 467
 468 /**
 469  * This thread takes bursts of packets from the rx_to_workers ring and
 470  * Changes the input port value to output port value. And feds it to
 471  * workers_to_tx
 472  */
 473 static int
 474 worker_thread(void *args_ptr)
 475 {
 476         const uint16_t nb_ports = rte_eth_dev_count_avail();
 477         uint16_t i, ret = 0;
 478         uint16_t burst_size = 0;
 479         struct worker_thread_args *args;
 480         struct rte_mbuf *burst_buffer[MAX_PKTS_BURST] = { NULL };
 481         struct rte_ring *ring_in, *ring_out;
 482         const unsigned xor_val = (nb_ports > 1);
 483         unsigned int core_id = rte_lcore_id();
 484
 485         args = (struct worker_thread_args *) args_ptr;
 486         ring_in  = args->ring_in;
 487         ring_out = args->ring_out;
 488
 489         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 490                                                         core_id);
 491
 492         while (!quit_signal) {
 493
 494                 /* dequeue the mbufs from rx_to_workers ring */
 495                 burst_size = rte_ring_dequeue_burst(ring_in,
 496                                 (void *)burst_buffer, MAX_PKTS_BURST, NULL);
 497                 if (unlikely(burst_size == 0))
 498                         continue;
 499
 500                 wkr_stats[core_id].deq_pkts += burst_size;
 501
 502                 /* just do some operation on mbuf */
 503                 for (i = 0; i < burst_size;)
 504                         burst_buffer[i++]->port ^= xor_val;
 505
 506                 /* enqueue the modified mbufs to workers_to_tx ring */
 507                 ret = rte_ring_enqueue_burst(ring_out, (void *)burst_buffer,
 508                                 burst_size, NULL);
 509                 wkr_stats[core_id].enq_pkts += ret;
 510                 if (unlikely(ret < burst_size)) {
 511                         /* Return the mbufs to their respective pool, dropping packets */
 512                         wkr_stats[core_id].enq_failed_pkts += burst_size - ret;
 513                         pktmbuf_free_bulk(&burst_buffer[ret], burst_size - ret);
 514                 }
 515         }
 516         return 0;
 517 }
 518
 519 /**
 520  * Dequeue mbufs from the workers_to_tx ring and reorder them before
 521  * transmitting.
 522  */
 523 static int
 524 send_thread(struct send_thread_args *args)
 525 {
 526         int ret;
 527         unsigned int i, dret;
 528         uint16_t nb_dq_mbufs;
 529         uint8_t outp;
 530         unsigned sent;
 531         struct rte_mbuf *mbufs[MAX_PKTS_BURST];
 532         struct rte_mbuf *rombufs[MAX_PKTS_BURST] = {NULL};
 533         static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
 534
 535         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__, rte_lcore_id());
 536
 537         configure_tx_buffers(tx_buffer);
 538
 539         while (!quit_signal) {
 540
 541                 /* deque the mbufs from workers_to_tx ring */
 542                 nb_dq_mbufs = rte_ring_dequeue_burst(args->ring_in,
 543                                 (void *)mbufs, MAX_PKTS_BURST, NULL);
 544
 545                 if (unlikely(nb_dq_mbufs == 0))
 546                         continue;
 547
 548                 app_stats.tx.dequeue_pkts += nb_dq_mbufs;
 549
 550                 for (i = 0; i < nb_dq_mbufs; i++) {
 551                         /* send dequeued mbufs for reordering */
 552                         ret = rte_reorder_insert(args->buffer, mbufs[i]);
 553
 554                         if (ret == -1 && rte_errno == ERANGE) {
 555                                 /* Too early pkts should be transmitted out directly */
 556                                 RTE_LOG_DP(DEBUG, REORDERAPP,
 557                                                 "%s():Cannot reorder early packet "
 558                                                 "direct enqueuing to TX\n", __func__);
 559                                 outp = mbufs[i]->port;
 560                                 if ((portmask & (1 << outp)) == 0) {
 561                                         rte_pktmbuf_free(mbufs[i]);
 562                                         continue;
 563                                 }
 564                                 if (rte_eth_tx_burst(outp, 0, (void *)mbufs[i], 1) != 1) {
 565                                         rte_pktmbuf_free(mbufs[i]);
 566                                         app_stats.tx.early_pkts_tx_failed_woro++;
 567                                 } else
 568                                         app_stats.tx.early_pkts_txtd_woro++;
 569                         } else if (ret == -1 && rte_errno == ENOSPC) {
 570                                 /**
 571                                  * Early pkts just outside of window should be dropped
 572                                  */
 573                                 rte_pktmbuf_free(mbufs[i]);
 574                         }
 575                 }
 576
 577                 /*
 578                  * drain MAX_PKTS_BURST of reordered
 579                  * mbufs for transmit
 580                  */
 581                 dret = rte_reorder_drain(args->buffer, rombufs, MAX_PKTS_BURST);
 582                 for (i = 0; i < dret; i++) {
 583
 584                         struct rte_eth_dev_tx_buffer *outbuf;
 585                         uint8_t outp1;
 586
 587                         outp1 = rombufs[i]->port;
 588                         /* skip ports that are not enabled */
 589                         if ((portmask & (1 << outp1)) == 0) {
 590                                 rte_pktmbuf_free(rombufs[i]);
 591                                 continue;
 592                         }
 593
 594                         outbuf = tx_buffer[outp1];
 595                         sent = rte_eth_tx_buffer(outp1, 0, outbuf, rombufs[i]);
 596                         if (sent)
 597                                 app_stats.tx.ro_tx_pkts += sent;
 598                 }
 599         }
 600
 601         free_tx_buffers(tx_buffer);
 602
 603         return 0;
 604 }
 605
 606 /**
 607  * Dequeue mbufs from the workers_to_tx ring and transmit them
 608  */
 609 static int
 610 tx_thread(struct rte_ring *ring_in)
 611 {
 612         uint32_t i, dqnum;
 613         uint8_t outp;
 614         unsigned sent;
 615         struct rte_mbuf *mbufs[MAX_PKTS_BURST];
 616         struct rte_eth_dev_tx_buffer *outbuf;
 617         static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
 618
 619         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 620                                                         rte_lcore_id());
 621
 622         configure_tx_buffers(tx_buffer);
 623
 624         while (!quit_signal) {
 625
 626                 /* deque the mbufs from workers_to_tx ring */
 627                 dqnum = rte_ring_dequeue_burst(ring_in,
 628                                 (void *)mbufs, MAX_PKTS_BURST, NULL);
 629
 630                 if (unlikely(dqnum == 0))
 631                         continue;
 632
 633                 app_stats.tx.dequeue_pkts += dqnum;
 634
 635                 for (i = 0; i < dqnum; i++) {
 636                         outp = mbufs[i]->port;
 637                         /* skip ports that are not enabled */
 638                         if ((portmask & (1 << outp)) == 0) {
 639                                 rte_pktmbuf_free(mbufs[i]);
 640                                 continue;
 641                         }
 642
 643                         outbuf = tx_buffer[outp];
 644                         sent = rte_eth_tx_buffer(outp, 0, outbuf, mbufs[i]);
 645                         if (sent)
 646                                 app_stats.tx.ro_tx_pkts += sent;
 647                 }
 648         }
 649
 650         return 0;
 651 }
 652
 653 int
 654 main(int argc, char **argv)
 655 {
 656         int ret;
 657         unsigned nb_ports;
 658         unsigned int lcore_id, last_lcore_id, master_lcore_id;
 659         uint16_t port_id;
 660         uint16_t nb_ports_available;
 661         struct worker_thread_args worker_args = {NULL, NULL};
 662         struct send_thread_args send_args = {NULL, NULL};
 663         struct rte_ring *rx_to_workers;
 664         struct rte_ring *workers_to_tx;
 665
 666         /* catch ctrl-c so we can print on exit */
 667         signal(SIGINT, int_handler);
 668
 669         /* Initialize EAL */
 670         ret = rte_eal_init(argc, argv);
 671         if (ret < 0)
 672                 return -1;
 673
 674         argc -= ret;
 675         argv += ret;
 676
 677         /* Parse the application specific arguments */
 678         ret = parse_args(argc, argv);
 679         if (ret < 0)
 680                 return -1;
 681
 682         /* Check if we have enought cores */
 683         if (rte_lcore_count() < 3)
 684                 rte_exit(EXIT_FAILURE, "Error, This application needs at "
 685                                 "least 3 logical cores to run:\n"
 686                                 "1 lcore for packet RX\n"
 687                                 "1 lcore for packet TX\n"
 688                                 "and at least 1 lcore for worker threads\n");
 689
 690         nb_ports = rte_eth_dev_count_avail();
 691         if (nb_ports == 0)
 692                 rte_exit(EXIT_FAILURE, "Error: no ethernet ports detected\n");
 693         if (nb_ports != 1 && (nb_ports & 1))
 694                 rte_exit(EXIT_FAILURE, "Error: number of ports must be even, except "
 695                                 "when using a single port\n");
 696
 697         mbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", MBUF_PER_POOL,
 698                         MBUF_POOL_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE,
 699                         rte_socket_id());
 700         if (mbuf_pool == NULL)
 701                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 702
 703         nb_ports_available = nb_ports;
 704
 705         /* initialize all ports */
 706         RTE_ETH_FOREACH_DEV(port_id) {
 707                 /* skip ports that are not enabled */
 708                 if ((portmask & (1 << port_id)) == 0) {
 709                         printf("\nSkipping disabled port %d\n", port_id);
 710                         nb_ports_available--;
 711                         continue;
 712                 }
 713                 /* init port */
 714                 printf("Initializing port %u... done\n", port_id);
 715
 716                 if (configure_eth_port(port_id) != 0)
 717                         rte_exit(EXIT_FAILURE, "Cannot initialize port %"PRIu8"\n",
 718                                         port_id);
 719         }
 720
 721         if (!nb_ports_available) {
 722                 rte_exit(EXIT_FAILURE,
 723                         "All available ports are disabled. Please set portmask.\n");
 724         }
 725
 726         /* Create rings for inter core communication */
 727         rx_to_workers = rte_ring_create("rx_to_workers", RING_SIZE, rte_socket_id(),
 728                         RING_F_SP_ENQ);
 729         if (rx_to_workers == NULL)
 730                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 731
 732         workers_to_tx = rte_ring_create("workers_to_tx", RING_SIZE, rte_socket_id(),
 733                         RING_F_SC_DEQ);
 734         if (workers_to_tx == NULL)
 735                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 736
 737         if (!disable_reorder) {
 738                 send_args.buffer = rte_reorder_create("PKT_RO", rte_socket_id(),
 739                                 REORDER_BUFFER_SIZE);
 740                 if (send_args.buffer == NULL)
 741                         rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 742         }
 743
 744         last_lcore_id   = get_last_lcore_id();
 745         master_lcore_id = rte_get_master_lcore();
 746
 747         worker_args.ring_in  = rx_to_workers;
 748         worker_args.ring_out = workers_to_tx;
 749
 750         /* Start worker_thread() on all the available slave cores but the last 1 */
 751         for (lcore_id = 0; lcore_id <= get_previous_lcore_id(last_lcore_id); lcore_id++)
 752                 if (rte_lcore_is_enabled(lcore_id) && lcore_id != master_lcore_id)
 753                         rte_eal_remote_launch(worker_thread, (void *)&worker_args,
 754                                         lcore_id);
 755
 756         if (disable_reorder) {
 757                 /* Start tx_thread() on the last slave core */
 758                 rte_eal_remote_launch((lcore_function_t *)tx_thread, workers_to_tx,
 759                                 last_lcore_id);
 760         } else {
 761                 send_args.ring_in = workers_to_tx;
 762                 /* Start send_thread() on the last slave core */
 763                 rte_eal_remote_launch((lcore_function_t *)send_thread,
 764                                 (void *)&send_args, last_lcore_id);
 765         }
 766
 767         /* Start rx_thread() on the master core */
 768         rx_thread(rx_to_workers);
 769
 770         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 771                 if (rte_eal_wait_lcore(lcore_id) < 0)
 772                         return -1;
 773         }
 774
 775         print_stats();
 776         return 0;
 777 }