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 enum {
  33 #define OPT_DISABLE_REORDER "disable-reorder"
  34         OPT_DISABLE_REORDER_NUM = 256,
  35 #define OPT_INSIGHT_WORKER  "insight-worker"
  36         OPT_INSIGHT_WORKER_NUM,
  37 };
  38
  39 unsigned int portmask;
  40 unsigned int disable_reorder;
  41 unsigned int insight_worker;
  42 volatile uint8_t quit_signal;
  43
  44 static struct rte_mempool *mbuf_pool;
  45
  46 static struct rte_eth_conf port_conf_default;
  47
  48 struct worker_thread_args {
  49         struct rte_ring *ring_in;
  50         struct rte_ring *ring_out;
  51 };
  52
  53 struct send_thread_args {
  54         struct rte_ring *ring_in;
  55         struct rte_reorder_buffer *buffer;
  56 };
  57
  58 volatile struct app_stats {
  59         struct {
  60                 uint64_t rx_pkts;
  61                 uint64_t enqueue_pkts;
  62                 uint64_t enqueue_failed_pkts;
  63         } rx __rte_cache_aligned;
  64
  65         struct {
  66                 uint64_t dequeue_pkts;
  67                 uint64_t enqueue_pkts;
  68                 uint64_t enqueue_failed_pkts;
  69         } wkr __rte_cache_aligned;
  70
  71         struct {
  72                 uint64_t dequeue_pkts;
  73                 /* Too early pkts transmitted directly w/o reordering */
  74                 uint64_t early_pkts_txtd_woro;
  75                 /* Too early pkts failed from direct transmit */
  76                 uint64_t early_pkts_tx_failed_woro;
  77                 uint64_t ro_tx_pkts;
  78                 uint64_t ro_tx_failed_pkts;
  79         } tx __rte_cache_aligned;
  80 } app_stats;
  81
  82 /* per worker lcore stats */
  83 struct wkr_stats_per {
  84                 uint64_t deq_pkts;
  85                 uint64_t enq_pkts;
  86                 uint64_t enq_failed_pkts;
  87 } __rte_cache_aligned;
  88
  89 static struct wkr_stats_per wkr_stats[RTE_MAX_LCORE] = { {0} };
  90 /**
  91  * Get the last enabled lcore ID
  92  *
  93  * @return
  94  *   The last enabled lcore ID.
  95  */
  96 static unsigned int
  97 get_last_lcore_id(void)
  98 {
  99         int i;
 100
 101         for (i = RTE_MAX_LCORE - 1; i >= 0; i--)
 102                 if (rte_lcore_is_enabled(i))
 103                         return i;
 104         return 0;
 105 }
 106
 107 /**
 108  * Get the previous enabled lcore ID
 109  * @param id
 110  *  The current lcore ID
 111  * @return
 112  *   The previous enabled lcore ID or the current lcore
 113  *   ID if it is the first available core.
 114  */
 115 static unsigned int
 116 get_previous_lcore_id(unsigned int id)
 117 {
 118         int i;
 119
 120         for (i = id - 1; i >= 0; i--)
 121                 if (rte_lcore_is_enabled(i))
 122                         return i;
 123         return id;
 124 }
 125
 126 static inline void
 127 pktmbuf_free_bulk(struct rte_mbuf *mbuf_table[], unsigned n)
 128 {
 129         unsigned int i;
 130
 131         for (i = 0; i < n; i++)
 132                 rte_pktmbuf_free(mbuf_table[i]);
 133 }
 134
 135 /* display usage */
 136 static void
 137 print_usage(const char *prgname)
 138 {
 139         printf("%s [EAL options] -- -p PORTMASK\n"
 140                         "  -p PORTMASK: hexadecimal bitmask of ports to configure\n",
 141                         prgname);
 142 }
 143
 144 static int
 145 parse_portmask(const char *portmask)
 146 {
 147         unsigned long pm;
 148         char *end = NULL;
 149
 150         /* parse hexadecimal string */
 151         pm = strtoul(portmask, &end, 16);
 152         if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
 153                 return 0;
 154
 155         return pm;
 156 }
 157
 158 /* Parse the argument given in the command line of the application */
 159 static int
 160 parse_args(int argc, char **argv)
 161 {
 162         int opt;
 163         int option_index;
 164         char **argvopt;
 165         char *prgname = argv[0];
 166         static struct option lgopts[] = {
 167                 {OPT_DISABLE_REORDER, 0, NULL, OPT_DISABLE_REORDER_NUM},
 168                 {OPT_INSIGHT_WORKER,  0, NULL, OPT_INSIGHT_WORKER_NUM },
 169                 {NULL,                0, 0,    0                      }
 170         };
 171
 172         argvopt = argv;
 173
 174         while ((opt = getopt_long(argc, argvopt, "p:",
 175                                         lgopts, &option_index)) != EOF) {
 176                 switch (opt) {
 177                 /* portmask */
 178                 case 'p':
 179                         portmask = parse_portmask(optarg);
 180                         if (portmask == 0) {
 181                                 printf("invalid portmask\n");
 182                                 print_usage(prgname);
 183                                 return -1;
 184                         }
 185                         break;
 186
 187                 /* long options */
 188                 case OPT_DISABLE_REORDER_NUM:
 189                         printf("reorder disabled\n");
 190                         disable_reorder = 1;
 191                         break;
 192
 193                 case OPT_INSIGHT_WORKER_NUM:
 194                         printf("print all worker statistics\n");
 195                         insight_worker = 1;
 196                         break;
 197
 198                 default:
 199                         print_usage(prgname);
 200                         return -1;
 201                 }
 202         }
 203         if (optind <= 1) {
 204                 print_usage(prgname);
 205                 return -1;
 206         }
 207
 208         argv[optind-1] = prgname;
 209         optind = 1; /* reset getopt lib */
 210         return 0;
 211 }
 212
 213 /*
 214  * Tx buffer error callback
 215  */
 216 static void
 217 flush_tx_error_callback(struct rte_mbuf **unsent, uint16_t count,
 218                 void *userdata __rte_unused) {
 219
 220         /* free the mbufs which failed from transmit */
 221         app_stats.tx.ro_tx_failed_pkts += count;
 222         RTE_LOG_DP(DEBUG, REORDERAPP, "%s:Packet loss with tx_burst\n", __func__);
 223         pktmbuf_free_bulk(unsent, count);
 224
 225 }
 226
 227 static inline int
 228 free_tx_buffers(struct rte_eth_dev_tx_buffer *tx_buffer[]) {
 229         uint16_t port_id;
 230
 231         /* initialize buffers for all ports */
 232         RTE_ETH_FOREACH_DEV(port_id) {
 233                 /* skip ports that are not enabled */
 234                 if ((portmask & (1 << port_id)) == 0)
 235                         continue;
 236
 237                 rte_free(tx_buffer[port_id]);
 238         }
 239         return 0;
 240 }
 241
 242 static inline int
 243 configure_tx_buffers(struct rte_eth_dev_tx_buffer *tx_buffer[])
 244 {
 245         uint16_t port_id;
 246         int ret;
 247
 248         /* initialize buffers for all ports */
 249         RTE_ETH_FOREACH_DEV(port_id) {
 250                 /* skip ports that are not enabled */
 251                 if ((portmask & (1 << port_id)) == 0)
 252                         continue;
 253
 254                 /* Initialize TX buffers */
 255                 tx_buffer[port_id] = rte_zmalloc_socket("tx_buffer",
 256                                 RTE_ETH_TX_BUFFER_SIZE(MAX_PKTS_BURST), 0,
 257                                 rte_eth_dev_socket_id(port_id));
 258                 if (tx_buffer[port_id] == NULL)
 259                         rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n",
 260                                  port_id);
 261
 262                 rte_eth_tx_buffer_init(tx_buffer[port_id], MAX_PKTS_BURST);
 263
 264                 ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[port_id],
 265                                 flush_tx_error_callback, NULL);
 266                 if (ret < 0)
 267                         rte_exit(EXIT_FAILURE,
 268                         "Cannot set error callback for tx buffer on port %u\n",
 269                                  port_id);
 270         }
 271         return 0;
 272 }
 273
 274 static inline int
 275 configure_eth_port(uint16_t port_id)
 276 {
 277         struct rte_ether_addr addr;
 278         const uint16_t rxRings = 1, txRings = 1;
 279         int ret;
 280         uint16_t q;
 281         uint16_t nb_rxd = RX_DESC_PER_QUEUE;
 282         uint16_t nb_txd = TX_DESC_PER_QUEUE;
 283         struct rte_eth_dev_info dev_info;
 284         struct rte_eth_txconf txconf;
 285         struct rte_eth_conf port_conf = port_conf_default;
 286
 287         if (!rte_eth_dev_is_valid_port(port_id))
 288                 return -1;
 289
 290         ret = rte_eth_dev_info_get(port_id, &dev_info);
 291         if (ret != 0) {
 292                 printf("Error during getting device (port %u) info: %s\n",
 293                                 port_id, strerror(-ret));
 294                 return ret;
 295         }
 296
 297         if (dev_info.tx_offload_capa & RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE)
 298                 port_conf.txmode.offloads |=
 299                         RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE;
 300         ret = rte_eth_dev_configure(port_id, rxRings, txRings, &port_conf);
 301         if (ret != 0)
 302                 return ret;
 303
 304         ret = rte_eth_dev_adjust_nb_rx_tx_desc(port_id, &nb_rxd, &nb_txd);
 305         if (ret != 0)
 306                 return ret;
 307
 308         for (q = 0; q < rxRings; q++) {
 309                 ret = rte_eth_rx_queue_setup(port_id, q, nb_rxd,
 310                                 rte_eth_dev_socket_id(port_id), NULL,
 311                                 mbuf_pool);
 312                 if (ret < 0)
 313                         return ret;
 314         }
 315
 316         txconf = dev_info.default_txconf;
 317         txconf.offloads = port_conf.txmode.offloads;
 318         for (q = 0; q < txRings; q++) {
 319                 ret = rte_eth_tx_queue_setup(port_id, q, nb_txd,
 320                                 rte_eth_dev_socket_id(port_id), &txconf);
 321                 if (ret < 0)
 322                         return ret;
 323         }
 324
 325         ret = rte_eth_dev_start(port_id);
 326         if (ret < 0)
 327                 return ret;
 328
 329         ret = rte_eth_macaddr_get(port_id, &addr);
 330         if (ret != 0) {
 331                 printf("Failed to get MAC address (port %u): %s\n",
 332                                 port_id, rte_strerror(-ret));
 333                 return ret;
 334         }
 335
 336         printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
 337                         " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
 338                         port_id, RTE_ETHER_ADDR_BYTES(&addr));
 339
 340         ret = rte_eth_promiscuous_enable(port_id);
 341         if (ret != 0)
 342                 return ret;
 343
 344         return 0;
 345 }
 346
 347 static void
 348 print_stats(void)
 349 {
 350         uint16_t i;
 351         struct rte_eth_stats eth_stats;
 352         unsigned int lcore_id, last_lcore_id, main_lcore_id, end_w_lcore_id;
 353
 354         last_lcore_id   = get_last_lcore_id();
 355         main_lcore_id = rte_get_main_lcore();
 356         end_w_lcore_id  = get_previous_lcore_id(last_lcore_id);
 357
 358         printf("\nRX thread stats:\n");
 359         printf(" - Pkts rxd:                            %"PRIu64"\n",
 360                                                 app_stats.rx.rx_pkts);
 361         printf(" - Pkts enqd to workers ring:           %"PRIu64"\n",
 362                                                 app_stats.rx.enqueue_pkts);
 363
 364         for (lcore_id = 0; lcore_id <= end_w_lcore_id; lcore_id++) {
 365                 if (insight_worker
 366                         && rte_lcore_is_enabled(lcore_id)
 367                         && lcore_id != main_lcore_id) {
 368                         printf("\nWorker thread stats on core [%u]:\n",
 369                                         lcore_id);
 370                         printf(" - Pkts deqd from workers ring:         %"PRIu64"\n",
 371                                         wkr_stats[lcore_id].deq_pkts);
 372                         printf(" - Pkts enqd to tx ring:                %"PRIu64"\n",
 373                                         wkr_stats[lcore_id].enq_pkts);
 374                         printf(" - Pkts enq to tx failed:               %"PRIu64"\n",
 375                                         wkr_stats[lcore_id].enq_failed_pkts);
 376                 }
 377
 378                 app_stats.wkr.dequeue_pkts += wkr_stats[lcore_id].deq_pkts;
 379                 app_stats.wkr.enqueue_pkts += wkr_stats[lcore_id].enq_pkts;
 380                 app_stats.wkr.enqueue_failed_pkts +=
 381                         wkr_stats[lcore_id].enq_failed_pkts;
 382         }
 383
 384         printf("\nWorker thread stats:\n");
 385         printf(" - Pkts deqd from workers ring:         %"PRIu64"\n",
 386                                                 app_stats.wkr.dequeue_pkts);
 387         printf(" - Pkts enqd to tx ring:                %"PRIu64"\n",
 388                                                 app_stats.wkr.enqueue_pkts);
 389         printf(" - Pkts enq to tx failed:               %"PRIu64"\n",
 390                                                 app_stats.wkr.enqueue_failed_pkts);
 391
 392         printf("\nTX stats:\n");
 393         printf(" - Pkts deqd from tx ring:              %"PRIu64"\n",
 394                                                 app_stats.tx.dequeue_pkts);
 395         printf(" - Ro Pkts transmitted:                 %"PRIu64"\n",
 396                                                 app_stats.tx.ro_tx_pkts);
 397         printf(" - Ro Pkts tx failed:                   %"PRIu64"\n",
 398                                                 app_stats.tx.ro_tx_failed_pkts);
 399         printf(" - Pkts transmitted w/o reorder:        %"PRIu64"\n",
 400                                                 app_stats.tx.early_pkts_txtd_woro);
 401         printf(" - Pkts tx failed w/o reorder:          %"PRIu64"\n",
 402                                                 app_stats.tx.early_pkts_tx_failed_woro);
 403
 404         RTE_ETH_FOREACH_DEV(i) {
 405                 rte_eth_stats_get(i, &eth_stats);
 406                 printf("\nPort %u stats:\n", i);
 407                 printf(" - Pkts in:   %"PRIu64"\n", eth_stats.ipackets);
 408                 printf(" - Pkts out:  %"PRIu64"\n", eth_stats.opackets);
 409                 printf(" - In Errs:   %"PRIu64"\n", eth_stats.ierrors);
 410                 printf(" - Out Errs:  %"PRIu64"\n", eth_stats.oerrors);
 411                 printf(" - Mbuf Errs: %"PRIu64"\n", eth_stats.rx_nombuf);
 412         }
 413 }
 414
 415 static void
 416 int_handler(int sig_num)
 417 {
 418         printf("Exiting on signal %d\n", sig_num);
 419         quit_signal = 1;
 420 }
 421
 422 /**
 423  * This thread receives mbufs from the port and affects them an internal
 424  * sequence number to keep track of their order of arrival through an
 425  * mbuf structure.
 426  * The mbufs are then passed to the worker threads via the rx_to_workers
 427  * ring.
 428  */
 429 static int
 430 rx_thread(struct rte_ring *ring_out)
 431 {
 432         uint32_t seqn = 0;
 433         uint16_t i, ret = 0;
 434         uint16_t nb_rx_pkts;
 435         uint16_t port_id;
 436         struct rte_mbuf *pkts[MAX_PKTS_BURST];
 437
 438         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 439                                                         rte_lcore_id());
 440
 441         while (!quit_signal) {
 442
 443                 RTE_ETH_FOREACH_DEV(port_id) {
 444                         if ((portmask & (1 << port_id)) != 0) {
 445
 446                                 /* receive packets */
 447                                 nb_rx_pkts = rte_eth_rx_burst(port_id, 0,
 448                                                                 pkts, MAX_PKTS_BURST);
 449                                 if (nb_rx_pkts == 0) {
 450                                         RTE_LOG_DP(DEBUG, REORDERAPP,
 451                                         "%s():Received zero packets\n", __func__);
 452                                         continue;
 453                                 }
 454                                 app_stats.rx.rx_pkts += nb_rx_pkts;
 455
 456                                 /* mark sequence number */
 457                                 for (i = 0; i < nb_rx_pkts; )
 458                                         *rte_reorder_seqn(pkts[i++]) = seqn++;
 459
 460                                 /* enqueue to rx_to_workers ring */
 461                                 ret = rte_ring_enqueue_burst(ring_out,
 462                                                 (void *)pkts, nb_rx_pkts, NULL);
 463                                 app_stats.rx.enqueue_pkts += ret;
 464                                 if (unlikely(ret < nb_rx_pkts)) {
 465                                         app_stats.rx.enqueue_failed_pkts +=
 466                                                                         (nb_rx_pkts-ret);
 467                                         pktmbuf_free_bulk(&pkts[ret], nb_rx_pkts - ret);
 468                                 }
 469                         }
 470                 }
 471         }
 472         return 0;
 473 }
 474
 475 /**
 476  * This thread takes bursts of packets from the rx_to_workers ring and
 477  * Changes the input port value to output port value. And feds it to
 478  * workers_to_tx
 479  */
 480 static int
 481 worker_thread(void *args_ptr)
 482 {
 483         const uint16_t nb_ports = rte_eth_dev_count_avail();
 484         uint16_t i, ret = 0;
 485         uint16_t burst_size = 0;
 486         struct worker_thread_args *args;
 487         struct rte_mbuf *burst_buffer[MAX_PKTS_BURST] = { NULL };
 488         struct rte_ring *ring_in, *ring_out;
 489         const unsigned xor_val = (nb_ports > 1);
 490         unsigned int core_id = rte_lcore_id();
 491
 492         args = (struct worker_thread_args *) args_ptr;
 493         ring_in  = args->ring_in;
 494         ring_out = args->ring_out;
 495
 496         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 497                                                         core_id);
 498
 499         while (!quit_signal) {
 500
 501                 /* dequeue the mbufs from rx_to_workers ring */
 502                 burst_size = rte_ring_dequeue_burst(ring_in,
 503                                 (void *)burst_buffer, MAX_PKTS_BURST, NULL);
 504                 if (unlikely(burst_size == 0))
 505                         continue;
 506
 507                 wkr_stats[core_id].deq_pkts += burst_size;
 508
 509                 /* just do some operation on mbuf */
 510                 for (i = 0; i < burst_size;)
 511                         burst_buffer[i++]->port ^= xor_val;
 512
 513                 /* enqueue the modified mbufs to workers_to_tx ring */
 514                 ret = rte_ring_enqueue_burst(ring_out, (void *)burst_buffer,
 515                                 burst_size, NULL);
 516                 wkr_stats[core_id].enq_pkts += ret;
 517                 if (unlikely(ret < burst_size)) {
 518                         /* Return the mbufs to their respective pool, dropping packets */
 519                         wkr_stats[core_id].enq_failed_pkts += burst_size - ret;
 520                         pktmbuf_free_bulk(&burst_buffer[ret], burst_size - ret);
 521                 }
 522         }
 523         return 0;
 524 }
 525
 526 /**
 527  * Dequeue mbufs from the workers_to_tx ring and reorder them before
 528  * transmitting.
 529  */
 530 static int
 531 send_thread(struct send_thread_args *args)
 532 {
 533         int ret;
 534         unsigned int i, dret;
 535         uint16_t nb_dq_mbufs;
 536         uint8_t outp;
 537         unsigned sent;
 538         struct rte_mbuf *mbufs[MAX_PKTS_BURST];
 539         struct rte_mbuf *rombufs[MAX_PKTS_BURST] = {NULL};
 540         static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
 541
 542         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__, rte_lcore_id());
 543
 544         configure_tx_buffers(tx_buffer);
 545
 546         while (!quit_signal) {
 547
 548                 /* deque the mbufs from workers_to_tx ring */
 549                 nb_dq_mbufs = rte_ring_dequeue_burst(args->ring_in,
 550                                 (void *)mbufs, MAX_PKTS_BURST, NULL);
 551
 552                 if (unlikely(nb_dq_mbufs == 0))
 553                         continue;
 554
 555                 app_stats.tx.dequeue_pkts += nb_dq_mbufs;
 556
 557                 for (i = 0; i < nb_dq_mbufs; i++) {
 558                         /* send dequeued mbufs for reordering */
 559                         ret = rte_reorder_insert(args->buffer, mbufs[i]);
 560
 561                         if (ret == -1 && rte_errno == ERANGE) {
 562                                 /* Too early pkts should be transmitted out directly */
 563                                 RTE_LOG_DP(DEBUG, REORDERAPP,
 564                                                 "%s():Cannot reorder early packet "
 565                                                 "direct enqueuing to TX\n", __func__);
 566                                 outp = mbufs[i]->port;
 567                                 if ((portmask & (1 << outp)) == 0) {
 568                                         rte_pktmbuf_free(mbufs[i]);
 569                                         continue;
 570                                 }
 571                                 if (rte_eth_tx_burst(outp, 0, (void *)mbufs[i], 1) != 1) {
 572                                         rte_pktmbuf_free(mbufs[i]);
 573                                         app_stats.tx.early_pkts_tx_failed_woro++;
 574                                 } else
 575                                         app_stats.tx.early_pkts_txtd_woro++;
 576                         } else if (ret == -1 && rte_errno == ENOSPC) {
 577                                 /**
 578                                  * Early pkts just outside of window should be dropped
 579                                  */
 580                                 rte_pktmbuf_free(mbufs[i]);
 581                         }
 582                 }
 583
 584                 /*
 585                  * drain MAX_PKTS_BURST of reordered
 586                  * mbufs for transmit
 587                  */
 588                 dret = rte_reorder_drain(args->buffer, rombufs, MAX_PKTS_BURST);
 589                 for (i = 0; i < dret; i++) {
 590
 591                         struct rte_eth_dev_tx_buffer *outbuf;
 592                         uint8_t outp1;
 593
 594                         outp1 = rombufs[i]->port;
 595                         /* skip ports that are not enabled */
 596                         if ((portmask & (1 << outp1)) == 0) {
 597                                 rte_pktmbuf_free(rombufs[i]);
 598                                 continue;
 599                         }
 600
 601                         outbuf = tx_buffer[outp1];
 602                         sent = rte_eth_tx_buffer(outp1, 0, outbuf, rombufs[i]);
 603                         if (sent)
 604                                 app_stats.tx.ro_tx_pkts += sent;
 605                 }
 606         }
 607
 608         free_tx_buffers(tx_buffer);
 609
 610         return 0;
 611 }
 612
 613 /**
 614  * Dequeue mbufs from the workers_to_tx ring and transmit them
 615  */
 616 static int
 617 tx_thread(struct rte_ring *ring_in)
 618 {
 619         uint32_t i, dqnum;
 620         uint8_t outp;
 621         unsigned sent;
 622         struct rte_mbuf *mbufs[MAX_PKTS_BURST];
 623         struct rte_eth_dev_tx_buffer *outbuf;
 624         static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
 625
 626         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 627                                                         rte_lcore_id());
 628
 629         configure_tx_buffers(tx_buffer);
 630
 631         while (!quit_signal) {
 632
 633                 /* deque the mbufs from workers_to_tx ring */
 634                 dqnum = rte_ring_dequeue_burst(ring_in,
 635                                 (void *)mbufs, MAX_PKTS_BURST, NULL);
 636
 637                 if (unlikely(dqnum == 0))
 638                         continue;
 639
 640                 app_stats.tx.dequeue_pkts += dqnum;
 641
 642                 for (i = 0; i < dqnum; i++) {
 643                         outp = mbufs[i]->port;
 644                         /* skip ports that are not enabled */
 645                         if ((portmask & (1 << outp)) == 0) {
 646                                 rte_pktmbuf_free(mbufs[i]);
 647                                 continue;
 648                         }
 649
 650                         outbuf = tx_buffer[outp];
 651                         sent = rte_eth_tx_buffer(outp, 0, outbuf, mbufs[i]);
 652                         if (sent)
 653                                 app_stats.tx.ro_tx_pkts += sent;
 654                 }
 655         }
 656
 657         return 0;
 658 }
 659
 660 int
 661 main(int argc, char **argv)
 662 {
 663         int ret;
 664         unsigned nb_ports;
 665         unsigned int lcore_id, last_lcore_id, main_lcore_id;
 666         uint16_t port_id;
 667         uint16_t nb_ports_available;
 668         struct worker_thread_args worker_args = {NULL, NULL};
 669         struct send_thread_args send_args = {NULL, NULL};
 670         struct rte_ring *rx_to_workers;
 671         struct rte_ring *workers_to_tx;
 672
 673         /* catch ctrl-c so we can print on exit */
 674         signal(SIGINT, int_handler);
 675
 676         /* Initialize EAL */
 677         ret = rte_eal_init(argc, argv);
 678         if (ret < 0)
 679                 rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
 680
 681         argc -= ret;
 682         argv += ret;
 683
 684         /* Parse the application specific arguments */
 685         ret = parse_args(argc, argv);
 686         if (ret < 0)
 687                 rte_exit(EXIT_FAILURE, "Invalid packet_ordering arguments\n");
 688
 689         /* Check if we have enought cores */
 690         if (rte_lcore_count() < 3)
 691                 rte_exit(EXIT_FAILURE, "Error, This application needs at "
 692                                 "least 3 logical cores to run:\n"
 693                                 "1 lcore for packet RX\n"
 694                                 "1 lcore for packet TX\n"
 695                                 "and at least 1 lcore for worker threads\n");
 696
 697         nb_ports = rte_eth_dev_count_avail();
 698         if (nb_ports == 0)
 699                 rte_exit(EXIT_FAILURE, "Error: no ethernet ports detected\n");
 700         if (nb_ports != 1 && (nb_ports & 1))
 701                 rte_exit(EXIT_FAILURE, "Error: number of ports must be even, except "
 702                                 "when using a single port\n");
 703
 704         mbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", MBUF_PER_POOL,
 705                         MBUF_POOL_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE,
 706                         rte_socket_id());
 707         if (mbuf_pool == NULL)
 708                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 709
 710         nb_ports_available = nb_ports;
 711
 712         /* initialize all ports */
 713         RTE_ETH_FOREACH_DEV(port_id) {
 714                 /* skip ports that are not enabled */
 715                 if ((portmask & (1 << port_id)) == 0) {
 716                         printf("\nSkipping disabled port %d\n", port_id);
 717                         nb_ports_available--;
 718                         continue;
 719                 }
 720                 /* init port */
 721                 printf("Initializing port %u... done\n", port_id);
 722
 723                 if (configure_eth_port(port_id) != 0)
 724                         rte_exit(EXIT_FAILURE, "Cannot initialize port %"PRIu8"\n",
 725                                         port_id);
 726         }
 727
 728         if (!nb_ports_available) {
 729                 rte_exit(EXIT_FAILURE,
 730                         "All available ports are disabled. Please set portmask.\n");
 731         }
 732
 733         /* Create rings for inter core communication */
 734         rx_to_workers = rte_ring_create("rx_to_workers", RING_SIZE, rte_socket_id(),
 735                         RING_F_SP_ENQ);
 736         if (rx_to_workers == NULL)
 737                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 738
 739         workers_to_tx = rte_ring_create("workers_to_tx", RING_SIZE, rte_socket_id(),
 740                         RING_F_SC_DEQ);
 741         if (workers_to_tx == NULL)
 742                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 743
 744         if (!disable_reorder) {
 745                 send_args.buffer = rte_reorder_create("PKT_RO", rte_socket_id(),
 746                                 REORDER_BUFFER_SIZE);
 747                 if (send_args.buffer == NULL)
 748                         rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 749         }
 750
 751         last_lcore_id   = get_last_lcore_id();
 752         main_lcore_id = rte_get_main_lcore();
 753
 754         worker_args.ring_in  = rx_to_workers;
 755         worker_args.ring_out = workers_to_tx;
 756
 757         /* Start worker_thread() on all the available worker cores but the last 1 */
 758         for (lcore_id = 0; lcore_id <= get_previous_lcore_id(last_lcore_id); lcore_id++)
 759                 if (rte_lcore_is_enabled(lcore_id) && lcore_id != main_lcore_id)
 760                         rte_eal_remote_launch(worker_thread, (void *)&worker_args,
 761                                         lcore_id);
 762
 763         if (disable_reorder) {
 764                 /* Start tx_thread() on the last worker core */
 765                 rte_eal_remote_launch((lcore_function_t *)tx_thread, workers_to_tx,
 766                                 last_lcore_id);
 767         } else {
 768                 send_args.ring_in = workers_to_tx;
 769                 /* Start send_thread() on the last worker core */
 770                 rte_eal_remote_launch((lcore_function_t *)send_thread,
 771                                 (void *)&send_args, last_lcore_id);
 772         }
 773
 774         /* Start rx_thread() on the main core */
 775         rx_thread(rx_to_workers);
 776
 777         RTE_LCORE_FOREACH_WORKER(lcore_id) {
 778                 if (rte_eal_wait_lcore(lcore_id) < 0)
 779                         return -1;
 780         }
 781
 782         print_stats();
 783
 784         /* clean up the EAL */
 785         rte_eal_cleanup();
 786
 787         return 0;
 788 }