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         ret = rte_eth_macaddr_get(port_id, &addr);
 326         if (ret != 0) {
 327                 printf("Failed to get MAC address (port %u): %s\n",
 328                                 port_id, rte_strerror(-ret));
 329                 return ret;
 330         }
 331
 332         printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
 333                         " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
 334                         port_id,
 335                         addr.addr_bytes[0], addr.addr_bytes[1],
 336                         addr.addr_bytes[2], addr.addr_bytes[3],
 337                         addr.addr_bytes[4], addr.addr_bytes[5]);
 338
 339         ret = rte_eth_promiscuous_enable(port_id);
 340         if (ret != 0)
 341                 return ret;
 342
 343         return 0;
 344 }
 345
 346 static void
 347 print_stats(void)
 348 {
 349         uint16_t i;
 350         struct rte_eth_stats eth_stats;
 351         unsigned int lcore_id, last_lcore_id, master_lcore_id, end_w_lcore_id;
 352
 353         last_lcore_id   = get_last_lcore_id();
 354         master_lcore_id = rte_get_master_lcore();
 355         end_w_lcore_id  = get_previous_lcore_id(last_lcore_id);
 356
 357         printf("\nRX thread stats:\n");
 358         printf(" - Pkts rxd:                            %"PRIu64"\n",
 359                                                 app_stats.rx.rx_pkts);
 360         printf(" - Pkts enqd to workers ring:           %"PRIu64"\n",
 361                                                 app_stats.rx.enqueue_pkts);
 362
 363         for (lcore_id = 0; lcore_id <= end_w_lcore_id; lcore_id++) {
 364                 if (insight_worker
 365                         && rte_lcore_is_enabled(lcore_id)
 366                         && lcore_id != master_lcore_id) {
 367                         printf("\nWorker thread stats on core [%u]:\n",
 368                                         lcore_id);
 369                         printf(" - Pkts deqd from workers ring:         %"PRIu64"\n",
 370                                         wkr_stats[lcore_id].deq_pkts);
 371                         printf(" - Pkts enqd to tx ring:                %"PRIu64"\n",
 372                                         wkr_stats[lcore_id].enq_pkts);
 373                         printf(" - Pkts enq to tx failed:               %"PRIu64"\n",
 374                                         wkr_stats[lcore_id].enq_failed_pkts);
 375                 }
 376
 377                 app_stats.wkr.dequeue_pkts += wkr_stats[lcore_id].deq_pkts;
 378                 app_stats.wkr.enqueue_pkts += wkr_stats[lcore_id].enq_pkts;
 379                 app_stats.wkr.enqueue_failed_pkts +=
 380                         wkr_stats[lcore_id].enq_failed_pkts;
 381         }
 382
 383         printf("\nWorker thread stats:\n");
 384         printf(" - Pkts deqd from workers ring:         %"PRIu64"\n",
 385                                                 app_stats.wkr.dequeue_pkts);
 386         printf(" - Pkts enqd to tx ring:                %"PRIu64"\n",
 387                                                 app_stats.wkr.enqueue_pkts);
 388         printf(" - Pkts enq to tx failed:               %"PRIu64"\n",
 389                                                 app_stats.wkr.enqueue_failed_pkts);
 390
 391         printf("\nTX stats:\n");
 392         printf(" - Pkts deqd from tx ring:              %"PRIu64"\n",
 393                                                 app_stats.tx.dequeue_pkts);
 394         printf(" - Ro Pkts transmitted:                 %"PRIu64"\n",
 395                                                 app_stats.tx.ro_tx_pkts);
 396         printf(" - Ro Pkts tx failed:                   %"PRIu64"\n",
 397                                                 app_stats.tx.ro_tx_failed_pkts);
 398         printf(" - Pkts transmitted w/o reorder:        %"PRIu64"\n",
 399                                                 app_stats.tx.early_pkts_txtd_woro);
 400         printf(" - Pkts tx failed w/o reorder:          %"PRIu64"\n",
 401                                                 app_stats.tx.early_pkts_tx_failed_woro);
 402
 403         RTE_ETH_FOREACH_DEV(i) {
 404                 rte_eth_stats_get(i, &eth_stats);
 405                 printf("\nPort %u stats:\n", i);
 406                 printf(" - Pkts in:   %"PRIu64"\n", eth_stats.ipackets);
 407                 printf(" - Pkts out:  %"PRIu64"\n", eth_stats.opackets);
 408                 printf(" - In Errs:   %"PRIu64"\n", eth_stats.ierrors);
 409                 printf(" - Out Errs:  %"PRIu64"\n", eth_stats.oerrors);
 410                 printf(" - Mbuf Errs: %"PRIu64"\n", eth_stats.rx_nombuf);
 411         }
 412 }
 413
 414 static void
 415 int_handler(int sig_num)
 416 {
 417         printf("Exiting on signal %d\n", sig_num);
 418         quit_signal = 1;
 419 }
 420
 421 /**
 422  * This thread receives mbufs from the port and affects them an internal
 423  * sequence number to keep track of their order of arrival through an
 424  * mbuf structure.
 425  * The mbufs are then passed to the worker threads via the rx_to_workers
 426  * ring.
 427  */
 428 static int
 429 rx_thread(struct rte_ring *ring_out)
 430 {
 431         uint32_t seqn = 0;
 432         uint16_t i, ret = 0;
 433         uint16_t nb_rx_pkts;
 434         uint16_t port_id;
 435         struct rte_mbuf *pkts[MAX_PKTS_BURST];
 436
 437         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 438                                                         rte_lcore_id());
 439
 440         while (!quit_signal) {
 441
 442                 RTE_ETH_FOREACH_DEV(port_id) {
 443                         if ((portmask & (1 << port_id)) != 0) {
 444
 445                                 /* receive packets */
 446                                 nb_rx_pkts = rte_eth_rx_burst(port_id, 0,
 447                                                                 pkts, MAX_PKTS_BURST);
 448                                 if (nb_rx_pkts == 0) {
 449                                         RTE_LOG_DP(DEBUG, REORDERAPP,
 450                                         "%s():Received zero packets\n", __func__);
 451                                         continue;
 452                                 }
 453                                 app_stats.rx.rx_pkts += nb_rx_pkts;
 454
 455                                 /* mark sequence number */
 456                                 for (i = 0; i < nb_rx_pkts; )
 457                                         pkts[i++]->seqn = seqn++;
 458
 459                                 /* enqueue to rx_to_workers ring */
 460                                 ret = rte_ring_enqueue_burst(ring_out,
 461                                                 (void *)pkts, nb_rx_pkts, NULL);
 462                                 app_stats.rx.enqueue_pkts += ret;
 463                                 if (unlikely(ret < nb_rx_pkts)) {
 464                                         app_stats.rx.enqueue_failed_pkts +=
 465                                                                         (nb_rx_pkts-ret);
 466                                         pktmbuf_free_bulk(&pkts[ret], nb_rx_pkts - ret);
 467                                 }
 468                         }
 469                 }
 470         }
 471         return 0;
 472 }
 473
 474 /**
 475  * This thread takes bursts of packets from the rx_to_workers ring and
 476  * Changes the input port value to output port value. And feds it to
 477  * workers_to_tx
 478  */
 479 static int
 480 worker_thread(void *args_ptr)
 481 {
 482         const uint16_t nb_ports = rte_eth_dev_count_avail();
 483         uint16_t i, ret = 0;
 484         uint16_t burst_size = 0;
 485         struct worker_thread_args *args;
 486         struct rte_mbuf *burst_buffer[MAX_PKTS_BURST] = { NULL };
 487         struct rte_ring *ring_in, *ring_out;
 488         const unsigned xor_val = (nb_ports > 1);
 489         unsigned int core_id = rte_lcore_id();
 490
 491         args = (struct worker_thread_args *) args_ptr;
 492         ring_in  = args->ring_in;
 493         ring_out = args->ring_out;
 494
 495         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 496                                                         core_id);
 497
 498         while (!quit_signal) {
 499
 500                 /* dequeue the mbufs from rx_to_workers ring */
 501                 burst_size = rte_ring_dequeue_burst(ring_in,
 502                                 (void *)burst_buffer, MAX_PKTS_BURST, NULL);
 503                 if (unlikely(burst_size == 0))
 504                         continue;
 505
 506                 wkr_stats[core_id].deq_pkts += burst_size;
 507
 508                 /* just do some operation on mbuf */
 509                 for (i = 0; i < burst_size;)
 510                         burst_buffer[i++]->port ^= xor_val;
 511
 512                 /* enqueue the modified mbufs to workers_to_tx ring */
 513                 ret = rte_ring_enqueue_burst(ring_out, (void *)burst_buffer,
 514                                 burst_size, NULL);
 515                 wkr_stats[core_id].enq_pkts += ret;
 516                 if (unlikely(ret < burst_size)) {
 517                         /* Return the mbufs to their respective pool, dropping packets */
 518                         wkr_stats[core_id].enq_failed_pkts += burst_size - ret;
 519                         pktmbuf_free_bulk(&burst_buffer[ret], burst_size - ret);
 520                 }
 521         }
 522         return 0;
 523 }
 524
 525 /**
 526  * Dequeue mbufs from the workers_to_tx ring and reorder them before
 527  * transmitting.
 528  */
 529 static int
 530 send_thread(struct send_thread_args *args)
 531 {
 532         int ret;
 533         unsigned int i, dret;
 534         uint16_t nb_dq_mbufs;
 535         uint8_t outp;
 536         unsigned sent;
 537         struct rte_mbuf *mbufs[MAX_PKTS_BURST];
 538         struct rte_mbuf *rombufs[MAX_PKTS_BURST] = {NULL};
 539         static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
 540
 541         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__, rte_lcore_id());
 542
 543         configure_tx_buffers(tx_buffer);
 544
 545         while (!quit_signal) {
 546
 547                 /* deque the mbufs from workers_to_tx ring */
 548                 nb_dq_mbufs = rte_ring_dequeue_burst(args->ring_in,
 549                                 (void *)mbufs, MAX_PKTS_BURST, NULL);
 550
 551                 if (unlikely(nb_dq_mbufs == 0))
 552                         continue;
 553
 554                 app_stats.tx.dequeue_pkts += nb_dq_mbufs;
 555
 556                 for (i = 0; i < nb_dq_mbufs; i++) {
 557                         /* send dequeued mbufs for reordering */
 558                         ret = rte_reorder_insert(args->buffer, mbufs[i]);
 559
 560                         if (ret == -1 && rte_errno == ERANGE) {
 561                                 /* Too early pkts should be transmitted out directly */
 562                                 RTE_LOG_DP(DEBUG, REORDERAPP,
 563                                                 "%s():Cannot reorder early packet "
 564                                                 "direct enqueuing to TX\n", __func__);
 565                                 outp = mbufs[i]->port;
 566                                 if ((portmask & (1 << outp)) == 0) {
 567                                         rte_pktmbuf_free(mbufs[i]);
 568                                         continue;
 569                                 }
 570                                 if (rte_eth_tx_burst(outp, 0, (void *)mbufs[i], 1) != 1) {
 571                                         rte_pktmbuf_free(mbufs[i]);
 572                                         app_stats.tx.early_pkts_tx_failed_woro++;
 573                                 } else
 574                                         app_stats.tx.early_pkts_txtd_woro++;
 575                         } else if (ret == -1 && rte_errno == ENOSPC) {
 576                                 /**
 577                                  * Early pkts just outside of window should be dropped
 578                                  */
 579                                 rte_pktmbuf_free(mbufs[i]);
 580                         }
 581                 }
 582
 583                 /*
 584                  * drain MAX_PKTS_BURST of reordered
 585                  * mbufs for transmit
 586                  */
 587                 dret = rte_reorder_drain(args->buffer, rombufs, MAX_PKTS_BURST);
 588                 for (i = 0; i < dret; i++) {
 589
 590                         struct rte_eth_dev_tx_buffer *outbuf;
 591                         uint8_t outp1;
 592
 593                         outp1 = rombufs[i]->port;
 594                         /* skip ports that are not enabled */
 595                         if ((portmask & (1 << outp1)) == 0) {
 596                                 rte_pktmbuf_free(rombufs[i]);
 597                                 continue;
 598                         }
 599
 600                         outbuf = tx_buffer[outp1];
 601                         sent = rte_eth_tx_buffer(outp1, 0, outbuf, rombufs[i]);
 602                         if (sent)
 603                                 app_stats.tx.ro_tx_pkts += sent;
 604                 }
 605         }
 606
 607         free_tx_buffers(tx_buffer);
 608
 609         return 0;
 610 }
 611
 612 /**
 613  * Dequeue mbufs from the workers_to_tx ring and transmit them
 614  */
 615 static int
 616 tx_thread(struct rte_ring *ring_in)
 617 {
 618         uint32_t i, dqnum;
 619         uint8_t outp;
 620         unsigned sent;
 621         struct rte_mbuf *mbufs[MAX_PKTS_BURST];
 622         struct rte_eth_dev_tx_buffer *outbuf;
 623         static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
 624
 625         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 626                                                         rte_lcore_id());
 627
 628         configure_tx_buffers(tx_buffer);
 629
 630         while (!quit_signal) {
 631
 632                 /* deque the mbufs from workers_to_tx ring */
 633                 dqnum = rte_ring_dequeue_burst(ring_in,
 634                                 (void *)mbufs, MAX_PKTS_BURST, NULL);
 635
 636                 if (unlikely(dqnum == 0))
 637                         continue;
 638
 639                 app_stats.tx.dequeue_pkts += dqnum;
 640
 641                 for (i = 0; i < dqnum; i++) {
 642                         outp = mbufs[i]->port;
 643                         /* skip ports that are not enabled */
 644                         if ((portmask & (1 << outp)) == 0) {
 645                                 rte_pktmbuf_free(mbufs[i]);
 646                                 continue;
 647                         }
 648
 649                         outbuf = tx_buffer[outp];
 650                         sent = rte_eth_tx_buffer(outp, 0, outbuf, mbufs[i]);
 651                         if (sent)
 652                                 app_stats.tx.ro_tx_pkts += sent;
 653                 }
 654         }
 655
 656         return 0;
 657 }
 658
 659 int
 660 main(int argc, char **argv)
 661 {
 662         int ret;
 663         unsigned nb_ports;
 664         unsigned int lcore_id, last_lcore_id, master_lcore_id;
 665         uint16_t port_id;
 666         uint16_t nb_ports_available;
 667         struct worker_thread_args worker_args = {NULL, NULL};
 668         struct send_thread_args send_args = {NULL, NULL};
 669         struct rte_ring *rx_to_workers;
 670         struct rte_ring *workers_to_tx;
 671
 672         /* catch ctrl-c so we can print on exit */
 673         signal(SIGINT, int_handler);
 674
 675         /* Initialize EAL */
 676         ret = rte_eal_init(argc, argv);
 677         if (ret < 0)
 678                 return -1;
 679
 680         argc -= ret;
 681         argv += ret;
 682
 683         /* Parse the application specific arguments */
 684         ret = parse_args(argc, argv);
 685         if (ret < 0)
 686                 return -1;
 687
 688         /* Check if we have enought cores */
 689         if (rte_lcore_count() < 3)
 690                 rte_exit(EXIT_FAILURE, "Error, This application needs at "
 691                                 "least 3 logical cores to run:\n"
 692                                 "1 lcore for packet RX\n"
 693                                 "1 lcore for packet TX\n"
 694                                 "and at least 1 lcore for worker threads\n");
 695
 696         nb_ports = rte_eth_dev_count_avail();
 697         if (nb_ports == 0)
 698                 rte_exit(EXIT_FAILURE, "Error: no ethernet ports detected\n");
 699         if (nb_ports != 1 && (nb_ports & 1))
 700                 rte_exit(EXIT_FAILURE, "Error: number of ports must be even, except "
 701                                 "when using a single port\n");
 702
 703         mbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", MBUF_PER_POOL,
 704                         MBUF_POOL_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE,
 705                         rte_socket_id());
 706         if (mbuf_pool == NULL)
 707                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 708
 709         nb_ports_available = nb_ports;
 710
 711         /* initialize all ports */
 712         RTE_ETH_FOREACH_DEV(port_id) {
 713                 /* skip ports that are not enabled */
 714                 if ((portmask & (1 << port_id)) == 0) {
 715                         printf("\nSkipping disabled port %d\n", port_id);
 716                         nb_ports_available--;
 717                         continue;
 718                 }
 719                 /* init port */
 720                 printf("Initializing port %u... done\n", port_id);
 721
 722                 if (configure_eth_port(port_id) != 0)
 723                         rte_exit(EXIT_FAILURE, "Cannot initialize port %"PRIu8"\n",
 724                                         port_id);
 725         }
 726
 727         if (!nb_ports_available) {
 728                 rte_exit(EXIT_FAILURE,
 729                         "All available ports are disabled. Please set portmask.\n");
 730         }
 731
 732         /* Create rings for inter core communication */
 733         rx_to_workers = rte_ring_create("rx_to_workers", RING_SIZE, rte_socket_id(),
 734                         RING_F_SP_ENQ);
 735         if (rx_to_workers == NULL)
 736                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 737
 738         workers_to_tx = rte_ring_create("workers_to_tx", RING_SIZE, rte_socket_id(),
 739                         RING_F_SC_DEQ);
 740         if (workers_to_tx == NULL)
 741                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 742
 743         if (!disable_reorder) {
 744                 send_args.buffer = rte_reorder_create("PKT_RO", rte_socket_id(),
 745                                 REORDER_BUFFER_SIZE);
 746                 if (send_args.buffer == NULL)
 747                         rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 748         }
 749
 750         last_lcore_id   = get_last_lcore_id();
 751         master_lcore_id = rte_get_master_lcore();
 752
 753         worker_args.ring_in  = rx_to_workers;
 754         worker_args.ring_out = workers_to_tx;
 755
 756         /* Start worker_thread() on all the available slave cores but the last 1 */
 757         for (lcore_id = 0; lcore_id <= get_previous_lcore_id(last_lcore_id); lcore_id++)
 758                 if (rte_lcore_is_enabled(lcore_id) && lcore_id != master_lcore_id)
 759                         rte_eal_remote_launch(worker_thread, (void *)&worker_args,
 760                                         lcore_id);
 761
 762         if (disable_reorder) {
 763                 /* Start tx_thread() on the last slave core */
 764                 rte_eal_remote_launch((lcore_function_t *)tx_thread, workers_to_tx,
 765                                 last_lcore_id);
 766         } else {
 767                 send_args.ring_in = workers_to_tx;
 768                 /* Start send_thread() on the last slave core */
 769                 rte_eal_remote_launch((lcore_function_t *)send_thread,
 770                                 (void *)&send_args, last_lcore_id);
 771         }
 772
 773         /* Start rx_thread() on the master core */
 774         rx_thread(rx_to_workers);
 775
 776         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 777                 if (rte_eal_wait_lcore(lcore_id) < 0)
 778                         return -1;
 779         }
 780
 781         print_stats();
 782         return 0;
 783 }