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 & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
 298                 port_conf.txmode.offloads |=
 299                         DEV_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,
 339                         addr.addr_bytes[0], addr.addr_bytes[1],
 340                         addr.addr_bytes[2], addr.addr_bytes[3],
 341                         addr.addr_bytes[4], addr.addr_bytes[5]);
 342
 343         ret = rte_eth_promiscuous_enable(port_id);
 344         if (ret != 0)
 345                 return ret;
 346
 347         return 0;
 348 }
 349
 350 static void
 351 print_stats(void)
 352 {
 353         uint16_t i;
 354         struct rte_eth_stats eth_stats;
 355         unsigned int lcore_id, last_lcore_id, main_lcore_id, end_w_lcore_id;
 356
 357         last_lcore_id   = get_last_lcore_id();
 358         main_lcore_id = rte_get_main_lcore();
 359         end_w_lcore_id  = get_previous_lcore_id(last_lcore_id);
 360
 361         printf("\nRX thread stats:\n");
 362         printf(" - Pkts rxd:                            %"PRIu64"\n",
 363                                                 app_stats.rx.rx_pkts);
 364         printf(" - Pkts enqd to workers ring:           %"PRIu64"\n",
 365                                                 app_stats.rx.enqueue_pkts);
 366
 367         for (lcore_id = 0; lcore_id <= end_w_lcore_id; lcore_id++) {
 368                 if (insight_worker
 369                         && rte_lcore_is_enabled(lcore_id)
 370                         && lcore_id != main_lcore_id) {
 371                         printf("\nWorker thread stats on core [%u]:\n",
 372                                         lcore_id);
 373                         printf(" - Pkts deqd from workers ring:         %"PRIu64"\n",
 374                                         wkr_stats[lcore_id].deq_pkts);
 375                         printf(" - Pkts enqd to tx ring:                %"PRIu64"\n",
 376                                         wkr_stats[lcore_id].enq_pkts);
 377                         printf(" - Pkts enq to tx failed:               %"PRIu64"\n",
 378                                         wkr_stats[lcore_id].enq_failed_pkts);
 379                 }
 380
 381                 app_stats.wkr.dequeue_pkts += wkr_stats[lcore_id].deq_pkts;
 382                 app_stats.wkr.enqueue_pkts += wkr_stats[lcore_id].enq_pkts;
 383                 app_stats.wkr.enqueue_failed_pkts +=
 384                         wkr_stats[lcore_id].enq_failed_pkts;
 385         }
 386
 387         printf("\nWorker thread stats:\n");
 388         printf(" - Pkts deqd from workers ring:         %"PRIu64"\n",
 389                                                 app_stats.wkr.dequeue_pkts);
 390         printf(" - Pkts enqd to tx ring:                %"PRIu64"\n",
 391                                                 app_stats.wkr.enqueue_pkts);
 392         printf(" - Pkts enq to tx failed:               %"PRIu64"\n",
 393                                                 app_stats.wkr.enqueue_failed_pkts);
 394
 395         printf("\nTX stats:\n");
 396         printf(" - Pkts deqd from tx ring:              %"PRIu64"\n",
 397                                                 app_stats.tx.dequeue_pkts);
 398         printf(" - Ro Pkts transmitted:                 %"PRIu64"\n",
 399                                                 app_stats.tx.ro_tx_pkts);
 400         printf(" - Ro Pkts tx failed:                   %"PRIu64"\n",
 401                                                 app_stats.tx.ro_tx_failed_pkts);
 402         printf(" - Pkts transmitted w/o reorder:        %"PRIu64"\n",
 403                                                 app_stats.tx.early_pkts_txtd_woro);
 404         printf(" - Pkts tx failed w/o reorder:          %"PRIu64"\n",
 405                                                 app_stats.tx.early_pkts_tx_failed_woro);
 406
 407         RTE_ETH_FOREACH_DEV(i) {
 408                 rte_eth_stats_get(i, &eth_stats);
 409                 printf("\nPort %u stats:\n", i);
 410                 printf(" - Pkts in:   %"PRIu64"\n", eth_stats.ipackets);
 411                 printf(" - Pkts out:  %"PRIu64"\n", eth_stats.opackets);
 412                 printf(" - In Errs:   %"PRIu64"\n", eth_stats.ierrors);
 413                 printf(" - Out Errs:  %"PRIu64"\n", eth_stats.oerrors);
 414                 printf(" - Mbuf Errs: %"PRIu64"\n", eth_stats.rx_nombuf);
 415         }
 416 }
 417
 418 static void
 419 int_handler(int sig_num)
 420 {
 421         printf("Exiting on signal %d\n", sig_num);
 422         quit_signal = 1;
 423 }
 424
 425 /**
 426  * This thread receives mbufs from the port and affects them an internal
 427  * sequence number to keep track of their order of arrival through an
 428  * mbuf structure.
 429  * The mbufs are then passed to the worker threads via the rx_to_workers
 430  * ring.
 431  */
 432 static int
 433 rx_thread(struct rte_ring *ring_out)
 434 {
 435         uint32_t seqn = 0;
 436         uint16_t i, ret = 0;
 437         uint16_t nb_rx_pkts;
 438         uint16_t port_id;
 439         struct rte_mbuf *pkts[MAX_PKTS_BURST];
 440
 441         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 442                                                         rte_lcore_id());
 443
 444         while (!quit_signal) {
 445
 446                 RTE_ETH_FOREACH_DEV(port_id) {
 447                         if ((portmask & (1 << port_id)) != 0) {
 448
 449                                 /* receive packets */
 450                                 nb_rx_pkts = rte_eth_rx_burst(port_id, 0,
 451                                                                 pkts, MAX_PKTS_BURST);
 452                                 if (nb_rx_pkts == 0) {
 453                                         RTE_LOG_DP(DEBUG, REORDERAPP,
 454                                         "%s():Received zero packets\n", __func__);
 455                                         continue;
 456                                 }
 457                                 app_stats.rx.rx_pkts += nb_rx_pkts;
 458
 459                                 /* mark sequence number */
 460                                 for (i = 0; i < nb_rx_pkts; )
 461                                         *rte_reorder_seqn(pkts[i++]) = seqn++;
 462
 463                                 /* enqueue to rx_to_workers ring */
 464                                 ret = rte_ring_enqueue_burst(ring_out,
 465                                                 (void *)pkts, nb_rx_pkts, NULL);
 466                                 app_stats.rx.enqueue_pkts += ret;
 467                                 if (unlikely(ret < nb_rx_pkts)) {
 468                                         app_stats.rx.enqueue_failed_pkts +=
 469                                                                         (nb_rx_pkts-ret);
 470                                         pktmbuf_free_bulk(&pkts[ret], nb_rx_pkts - ret);
 471                                 }
 472                         }
 473                 }
 474         }
 475         return 0;
 476 }
 477
 478 /**
 479  * This thread takes bursts of packets from the rx_to_workers ring and
 480  * Changes the input port value to output port value. And feds it to
 481  * workers_to_tx
 482  */
 483 static int
 484 worker_thread(void *args_ptr)
 485 {
 486         const uint16_t nb_ports = rte_eth_dev_count_avail();
 487         uint16_t i, ret = 0;
 488         uint16_t burst_size = 0;
 489         struct worker_thread_args *args;
 490         struct rte_mbuf *burst_buffer[MAX_PKTS_BURST] = { NULL };
 491         struct rte_ring *ring_in, *ring_out;
 492         const unsigned xor_val = (nb_ports > 1);
 493         unsigned int core_id = rte_lcore_id();
 494
 495         args = (struct worker_thread_args *) args_ptr;
 496         ring_in  = args->ring_in;
 497         ring_out = args->ring_out;
 498
 499         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 500                                                         core_id);
 501
 502         while (!quit_signal) {
 503
 504                 /* dequeue the mbufs from rx_to_workers ring */
 505                 burst_size = rte_ring_dequeue_burst(ring_in,
 506                                 (void *)burst_buffer, MAX_PKTS_BURST, NULL);
 507                 if (unlikely(burst_size == 0))
 508                         continue;
 509
 510                 wkr_stats[core_id].deq_pkts += burst_size;
 511
 512                 /* just do some operation on mbuf */
 513                 for (i = 0; i < burst_size;)
 514                         burst_buffer[i++]->port ^= xor_val;
 515
 516                 /* enqueue the modified mbufs to workers_to_tx ring */
 517                 ret = rte_ring_enqueue_burst(ring_out, (void *)burst_buffer,
 518                                 burst_size, NULL);
 519                 wkr_stats[core_id].enq_pkts += ret;
 520                 if (unlikely(ret < burst_size)) {
 521                         /* Return the mbufs to their respective pool, dropping packets */
 522                         wkr_stats[core_id].enq_failed_pkts += burst_size - ret;
 523                         pktmbuf_free_bulk(&burst_buffer[ret], burst_size - ret);
 524                 }
 525         }
 526         return 0;
 527 }
 528
 529 /**
 530  * Dequeue mbufs from the workers_to_tx ring and reorder them before
 531  * transmitting.
 532  */
 533 static int
 534 send_thread(struct send_thread_args *args)
 535 {
 536         int ret;
 537         unsigned int i, dret;
 538         uint16_t nb_dq_mbufs;
 539         uint8_t outp;
 540         unsigned sent;
 541         struct rte_mbuf *mbufs[MAX_PKTS_BURST];
 542         struct rte_mbuf *rombufs[MAX_PKTS_BURST] = {NULL};
 543         static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
 544
 545         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__, rte_lcore_id());
 546
 547         configure_tx_buffers(tx_buffer);
 548
 549         while (!quit_signal) {
 550
 551                 /* deque the mbufs from workers_to_tx ring */
 552                 nb_dq_mbufs = rte_ring_dequeue_burst(args->ring_in,
 553                                 (void *)mbufs, MAX_PKTS_BURST, NULL);
 554
 555                 if (unlikely(nb_dq_mbufs == 0))
 556                         continue;
 557
 558                 app_stats.tx.dequeue_pkts += nb_dq_mbufs;
 559
 560                 for (i = 0; i < nb_dq_mbufs; i++) {
 561                         /* send dequeued mbufs for reordering */
 562                         ret = rte_reorder_insert(args->buffer, mbufs[i]);
 563
 564                         if (ret == -1 && rte_errno == ERANGE) {
 565                                 /* Too early pkts should be transmitted out directly */
 566                                 RTE_LOG_DP(DEBUG, REORDERAPP,
 567                                                 "%s():Cannot reorder early packet "
 568                                                 "direct enqueuing to TX\n", __func__);
 569                                 outp = mbufs[i]->port;
 570                                 if ((portmask & (1 << outp)) == 0) {
 571                                         rte_pktmbuf_free(mbufs[i]);
 572                                         continue;
 573                                 }
 574                                 if (rte_eth_tx_burst(outp, 0, (void *)mbufs[i], 1) != 1) {
 575                                         rte_pktmbuf_free(mbufs[i]);
 576                                         app_stats.tx.early_pkts_tx_failed_woro++;
 577                                 } else
 578                                         app_stats.tx.early_pkts_txtd_woro++;
 579                         } else if (ret == -1 && rte_errno == ENOSPC) {
 580                                 /**
 581                                  * Early pkts just outside of window should be dropped
 582                                  */
 583                                 rte_pktmbuf_free(mbufs[i]);
 584                         }
 585                 }
 586
 587                 /*
 588                  * drain MAX_PKTS_BURST of reordered
 589                  * mbufs for transmit
 590                  */
 591                 dret = rte_reorder_drain(args->buffer, rombufs, MAX_PKTS_BURST);
 592                 for (i = 0; i < dret; i++) {
 593
 594                         struct rte_eth_dev_tx_buffer *outbuf;
 595                         uint8_t outp1;
 596
 597                         outp1 = rombufs[i]->port;
 598                         /* skip ports that are not enabled */
 599                         if ((portmask & (1 << outp1)) == 0) {
 600                                 rte_pktmbuf_free(rombufs[i]);
 601                                 continue;
 602                         }
 603
 604                         outbuf = tx_buffer[outp1];
 605                         sent = rte_eth_tx_buffer(outp1, 0, outbuf, rombufs[i]);
 606                         if (sent)
 607                                 app_stats.tx.ro_tx_pkts += sent;
 608                 }
 609         }
 610
 611         free_tx_buffers(tx_buffer);
 612
 613         return 0;
 614 }
 615
 616 /**
 617  * Dequeue mbufs from the workers_to_tx ring and transmit them
 618  */
 619 static int
 620 tx_thread(struct rte_ring *ring_in)
 621 {
 622         uint32_t i, dqnum;
 623         uint8_t outp;
 624         unsigned sent;
 625         struct rte_mbuf *mbufs[MAX_PKTS_BURST];
 626         struct rte_eth_dev_tx_buffer *outbuf;
 627         static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
 628
 629         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 630                                                         rte_lcore_id());
 631
 632         configure_tx_buffers(tx_buffer);
 633
 634         while (!quit_signal) {
 635
 636                 /* deque the mbufs from workers_to_tx ring */
 637                 dqnum = rte_ring_dequeue_burst(ring_in,
 638                                 (void *)mbufs, MAX_PKTS_BURST, NULL);
 639
 640                 if (unlikely(dqnum == 0))
 641                         continue;
 642
 643                 app_stats.tx.dequeue_pkts += dqnum;
 644
 645                 for (i = 0; i < dqnum; i++) {
 646                         outp = mbufs[i]->port;
 647                         /* skip ports that are not enabled */
 648                         if ((portmask & (1 << outp)) == 0) {
 649                                 rte_pktmbuf_free(mbufs[i]);
 650                                 continue;
 651                         }
 652
 653                         outbuf = tx_buffer[outp];
 654                         sent = rte_eth_tx_buffer(outp, 0, outbuf, mbufs[i]);
 655                         if (sent)
 656                                 app_stats.tx.ro_tx_pkts += sent;
 657                 }
 658         }
 659
 660         return 0;
 661 }
 662
 663 int
 664 main(int argc, char **argv)
 665 {
 666         int ret;
 667         unsigned nb_ports;
 668         unsigned int lcore_id, last_lcore_id, main_lcore_id;
 669         uint16_t port_id;
 670         uint16_t nb_ports_available;
 671         struct worker_thread_args worker_args = {NULL, NULL};
 672         struct send_thread_args send_args = {NULL, NULL};
 673         struct rte_ring *rx_to_workers;
 674         struct rte_ring *workers_to_tx;
 675
 676         /* catch ctrl-c so we can print on exit */
 677         signal(SIGINT, int_handler);
 678
 679         /* Initialize EAL */
 680         ret = rte_eal_init(argc, argv);
 681         if (ret < 0)
 682                 rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
 683
 684         argc -= ret;
 685         argv += ret;
 686
 687         /* Parse the application specific arguments */
 688         ret = parse_args(argc, argv);
 689         if (ret < 0)
 690                 rte_exit(EXIT_FAILURE, "Invalid packet_ordering arguments\n");
 691
 692         /* Check if we have enought cores */
 693         if (rte_lcore_count() < 3)
 694                 rte_exit(EXIT_FAILURE, "Error, This application needs at "
 695                                 "least 3 logical cores to run:\n"
 696                                 "1 lcore for packet RX\n"
 697                                 "1 lcore for packet TX\n"
 698                                 "and at least 1 lcore for worker threads\n");
 699
 700         nb_ports = rte_eth_dev_count_avail();
 701         if (nb_ports == 0)
 702                 rte_exit(EXIT_FAILURE, "Error: no ethernet ports detected\n");
 703         if (nb_ports != 1 && (nb_ports & 1))
 704                 rte_exit(EXIT_FAILURE, "Error: number of ports must be even, except "
 705                                 "when using a single port\n");
 706
 707         mbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", MBUF_PER_POOL,
 708                         MBUF_POOL_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE,
 709                         rte_socket_id());
 710         if (mbuf_pool == NULL)
 711                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 712
 713         nb_ports_available = nb_ports;
 714
 715         /* initialize all ports */
 716         RTE_ETH_FOREACH_DEV(port_id) {
 717                 /* skip ports that are not enabled */
 718                 if ((portmask & (1 << port_id)) == 0) {
 719                         printf("\nSkipping disabled port %d\n", port_id);
 720                         nb_ports_available--;
 721                         continue;
 722                 }
 723                 /* init port */
 724                 printf("Initializing port %u... done\n", port_id);
 725
 726                 if (configure_eth_port(port_id) != 0)
 727                         rte_exit(EXIT_FAILURE, "Cannot initialize port %"PRIu8"\n",
 728                                         port_id);
 729         }
 730
 731         if (!nb_ports_available) {
 732                 rte_exit(EXIT_FAILURE,
 733                         "All available ports are disabled. Please set portmask.\n");
 734         }
 735
 736         /* Create rings for inter core communication */
 737         rx_to_workers = rte_ring_create("rx_to_workers", RING_SIZE, rte_socket_id(),
 738                         RING_F_SP_ENQ);
 739         if (rx_to_workers == NULL)
 740                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 741
 742         workers_to_tx = rte_ring_create("workers_to_tx", RING_SIZE, rte_socket_id(),
 743                         RING_F_SC_DEQ);
 744         if (workers_to_tx == NULL)
 745                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 746
 747         if (!disable_reorder) {
 748                 send_args.buffer = rte_reorder_create("PKT_RO", rte_socket_id(),
 749                                 REORDER_BUFFER_SIZE);
 750                 if (send_args.buffer == NULL)
 751                         rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 752         }
 753
 754         last_lcore_id   = get_last_lcore_id();
 755         main_lcore_id = rte_get_main_lcore();
 756
 757         worker_args.ring_in  = rx_to_workers;
 758         worker_args.ring_out = workers_to_tx;
 759
 760         /* Start worker_thread() on all the available worker cores but the last 1 */
 761         for (lcore_id = 0; lcore_id <= get_previous_lcore_id(last_lcore_id); lcore_id++)
 762                 if (rte_lcore_is_enabled(lcore_id) && lcore_id != main_lcore_id)
 763                         rte_eal_remote_launch(worker_thread, (void *)&worker_args,
 764                                         lcore_id);
 765
 766         if (disable_reorder) {
 767                 /* Start tx_thread() on the last worker core */
 768                 rte_eal_remote_launch((lcore_function_t *)tx_thread, workers_to_tx,
 769                                 last_lcore_id);
 770         } else {
 771                 send_args.ring_in = workers_to_tx;
 772                 /* Start send_thread() on the last worker core */
 773                 rte_eal_remote_launch((lcore_function_t *)send_thread,
 774                                 (void *)&send_args, last_lcore_id);
 775         }
 776
 777         /* Start rx_thread() on the main core */
 778         rx_thread(rx_to_workers);
 779
 780         RTE_LCORE_FOREACH_WORKER(lcore_id) {
 781                 if (rte_eal_wait_lcore(lcore_id) < 0)
 782                         return -1;
 783         }
 784
 785         print_stats();
 786         return 0;
 787 }