ceph/src/dpdk/examples/packet_ordering/main.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <signal.h>
  35 #include <getopt.h>
  36
  37 #include <rte_eal.h>
  38 #include <rte_common.h>
  39 #include <rte_errno.h>
  40 #include <rte_ethdev.h>
  41 #include <rte_lcore.h>
  42 #include <rte_malloc.h>
  43 #include <rte_mbuf.h>
  44 #include <rte_mempool.h>
  45 #include <rte_ring.h>
  46 #include <rte_reorder.h>
  47
  48 #define RX_DESC_PER_QUEUE 128
  49 #define TX_DESC_PER_QUEUE 512
  50
  51 #define MAX_PKTS_BURST 32
  52 #define REORDER_BUFFER_SIZE 8192
  53 #define MBUF_PER_POOL 65535
  54 #define MBUF_POOL_CACHE_SIZE 250
  55
  56 #define RING_SIZE 16384
  57
  58 /* Macros for printing using RTE_LOG */
  59 #define RTE_LOGTYPE_REORDERAPP          RTE_LOGTYPE_USER1
  60
  61 unsigned int portmask;
  62 unsigned int disable_reorder;
  63 volatile uint8_t quit_signal;
  64
  65 static struct rte_mempool *mbuf_pool;
  66
  67 static struct rte_eth_conf port_conf_default;
  68
  69 struct worker_thread_args {
  70         struct rte_ring *ring_in;
  71         struct rte_ring *ring_out;
  72 };
  73
  74 struct send_thread_args {
  75         struct rte_ring *ring_in;
  76         struct rte_reorder_buffer *buffer;
  77 };
  78
  79 volatile struct app_stats {
  80         struct {
  81                 uint64_t rx_pkts;
  82                 uint64_t enqueue_pkts;
  83                 uint64_t enqueue_failed_pkts;
  84         } rx __rte_cache_aligned;
  85
  86         struct {
  87                 uint64_t dequeue_pkts;
  88                 uint64_t enqueue_pkts;
  89                 uint64_t enqueue_failed_pkts;
  90         } wkr __rte_cache_aligned;
  91
  92         struct {
  93                 uint64_t dequeue_pkts;
  94                 /* Too early pkts transmitted directly w/o reordering */
  95                 uint64_t early_pkts_txtd_woro;
  96                 /* Too early pkts failed from direct transmit */
  97                 uint64_t early_pkts_tx_failed_woro;
  98                 uint64_t ro_tx_pkts;
  99                 uint64_t ro_tx_failed_pkts;
 100         } tx __rte_cache_aligned;
 101 } app_stats;
 102
 103 /**
 104  * Get the last enabled lcore ID
 105  *
 106  * @return
 107  *   The last enabled lcore ID.
 108  */
 109 static unsigned int
 110 get_last_lcore_id(void)
 111 {
 112         int i;
 113
 114         for (i = RTE_MAX_LCORE - 1; i >= 0; i--)
 115                 if (rte_lcore_is_enabled(i))
 116                         return i;
 117         return 0;
 118 }
 119
 120 /**
 121  * Get the previous enabled lcore ID
 122  * @param id
 123  *  The current lcore ID
 124  * @return
 125  *   The previous enabled lcore ID or the current lcore
 126  *   ID if it is the first available core.
 127  */
 128 static unsigned int
 129 get_previous_lcore_id(unsigned int id)
 130 {
 131         int i;
 132
 133         for (i = id - 1; i >= 0; i--)
 134                 if (rte_lcore_is_enabled(i))
 135                         return i;
 136         return id;
 137 }
 138
 139 static inline void
 140 pktmbuf_free_bulk(struct rte_mbuf *mbuf_table[], unsigned n)
 141 {
 142         unsigned int i;
 143
 144         for (i = 0; i < n; i++)
 145                 rte_pktmbuf_free(mbuf_table[i]);
 146 }
 147
 148 /* display usage */
 149 static void
 150 print_usage(const char *prgname)
 151 {
 152         printf("%s [EAL options] -- -p PORTMASK\n"
 153                         "  -p PORTMASK: hexadecimal bitmask of ports to configure\n",
 154                         prgname);
 155 }
 156
 157 static int
 158 parse_portmask(const char *portmask)
 159 {
 160         unsigned long pm;
 161         char *end = NULL;
 162
 163         /* parse hexadecimal string */
 164         pm = strtoul(portmask, &end, 16);
 165         if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
 166                 return -1;
 167
 168         if (pm == 0)
 169                 return -1;
 170
 171         return pm;
 172 }
 173
 174 /* Parse the argument given in the command line of the application */
 175 static int
 176 parse_args(int argc, char **argv)
 177 {
 178         int opt;
 179         int option_index;
 180         char **argvopt;
 181         char *prgname = argv[0];
 182         static struct option lgopts[] = {
 183                 {"disable-reorder", 0, 0, 0},
 184                 {NULL, 0, 0, 0}
 185         };
 186
 187         argvopt = argv;
 188
 189         while ((opt = getopt_long(argc, argvopt, "p:",
 190                                         lgopts, &option_index)) != EOF) {
 191                 switch (opt) {
 192                 /* portmask */
 193                 case 'p':
 194                         portmask = parse_portmask(optarg);
 195                         if (portmask == 0) {
 196                                 printf("invalid portmask\n");
 197                                 print_usage(prgname);
 198                                 return -1;
 199                         }
 200                         break;
 201                 /* long options */
 202                 case 0:
 203                         if (!strcmp(lgopts[option_index].name, "disable-reorder")) {
 204                                 printf("reorder disabled\n");
 205                                 disable_reorder = 1;
 206                         }
 207                         break;
 208                 default:
 209                         print_usage(prgname);
 210                         return -1;
 211                 }
 212         }
 213         if (optind <= 1) {
 214                 print_usage(prgname);
 215                 return -1;
 216         }
 217
 218         argv[optind-1] = prgname;
 219         optind = 0; /* reset getopt lib */
 220         return 0;
 221 }
 222
 223 /*
 224  * Tx buffer error callback
 225  */
 226 static void
 227 flush_tx_error_callback(struct rte_mbuf **unsent, uint16_t count,
 228                 void *userdata __rte_unused) {
 229
 230         /* free the mbufs which failed from transmit */
 231         app_stats.tx.ro_tx_failed_pkts += count;
 232         RTE_LOG(DEBUG, REORDERAPP, "%s:Packet loss with tx_burst\n", __func__);
 233         pktmbuf_free_bulk(unsent, count);
 234
 235 }
 236
 237 static inline int
 238 free_tx_buffers(struct rte_eth_dev_tx_buffer *tx_buffer[]) {
 239         const uint8_t nb_ports = rte_eth_dev_count();
 240         unsigned port_id;
 241
 242         /* initialize buffers for all ports */
 243         for (port_id = 0; port_id < nb_ports; port_id++) {
 244                 /* skip ports that are not enabled */
 245                 if ((portmask & (1 << port_id)) == 0)
 246                         continue;
 247
 248                 rte_free(tx_buffer[port_id]);
 249         }
 250         return 0;
 251 }
 252
 253 static inline int
 254 configure_tx_buffers(struct rte_eth_dev_tx_buffer *tx_buffer[])
 255 {
 256         const uint8_t nb_ports = rte_eth_dev_count();
 257         unsigned port_id;
 258         int ret;
 259
 260         /* initialize buffers for all ports */
 261         for (port_id = 0; port_id < nb_ports; port_id++) {
 262                 /* skip ports that are not enabled */
 263                 if ((portmask & (1 << port_id)) == 0)
 264                         continue;
 265
 266                 /* Initialize TX buffers */
 267                 tx_buffer[port_id] = rte_zmalloc_socket("tx_buffer",
 268                                 RTE_ETH_TX_BUFFER_SIZE(MAX_PKTS_BURST), 0,
 269                                 rte_eth_dev_socket_id(port_id));
 270                 if (tx_buffer[port_id] == NULL)
 271                         rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n",
 272                                         (unsigned) port_id);
 273
 274                 rte_eth_tx_buffer_init(tx_buffer[port_id], MAX_PKTS_BURST);
 275
 276                 ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[port_id],
 277                                 flush_tx_error_callback, NULL);
 278                 if (ret < 0)
 279                         rte_exit(EXIT_FAILURE, "Cannot set error callback for "
 280                                         "tx buffer on port %u\n", (unsigned) port_id);
 281         }
 282         return 0;
 283 }
 284
 285 static inline int
 286 configure_eth_port(uint8_t port_id)
 287 {
 288         struct ether_addr addr;
 289         const uint16_t rxRings = 1, txRings = 1;
 290         const uint8_t nb_ports = rte_eth_dev_count();
 291         int ret;
 292         uint16_t q;
 293
 294         if (port_id > nb_ports)
 295                 return -1;
 296
 297         ret = rte_eth_dev_configure(port_id, rxRings, txRings, &port_conf_default);
 298         if (ret != 0)
 299                 return ret;
 300
 301         for (q = 0; q < rxRings; q++) {
 302                 ret = rte_eth_rx_queue_setup(port_id, q, RX_DESC_PER_QUEUE,
 303                                 rte_eth_dev_socket_id(port_id), NULL,
 304                                 mbuf_pool);
 305                 if (ret < 0)
 306                         return ret;
 307         }
 308
 309         for (q = 0; q < txRings; q++) {
 310                 ret = rte_eth_tx_queue_setup(port_id, q, TX_DESC_PER_QUEUE,
 311                                 rte_eth_dev_socket_id(port_id), NULL);
 312                 if (ret < 0)
 313                         return ret;
 314         }
 315
 316         ret = rte_eth_dev_start(port_id);
 317         if (ret < 0)
 318                 return ret;
 319
 320         rte_eth_macaddr_get(port_id, &addr);
 321         printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
 322                         " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
 323                         (unsigned)port_id,
 324                         addr.addr_bytes[0], addr.addr_bytes[1],
 325                         addr.addr_bytes[2], addr.addr_bytes[3],
 326                         addr.addr_bytes[4], addr.addr_bytes[5]);
 327
 328         rte_eth_promiscuous_enable(port_id);
 329
 330         return 0;
 331 }
 332
 333 static void
 334 print_stats(void)
 335 {
 336         const uint8_t nb_ports = rte_eth_dev_count();
 337         unsigned i;
 338         struct rte_eth_stats eth_stats;
 339
 340         printf("\nRX thread stats:\n");
 341         printf(" - Pkts rxd:                            %"PRIu64"\n",
 342                                                 app_stats.rx.rx_pkts);
 343         printf(" - Pkts enqd to workers ring:           %"PRIu64"\n",
 344                                                 app_stats.rx.enqueue_pkts);
 345
 346         printf("\nWorker thread stats:\n");
 347         printf(" - Pkts deqd from workers ring:         %"PRIu64"\n",
 348                                                 app_stats.wkr.dequeue_pkts);
 349         printf(" - Pkts enqd to tx ring:                %"PRIu64"\n",
 350                                                 app_stats.wkr.enqueue_pkts);
 351         printf(" - Pkts enq to tx failed:               %"PRIu64"\n",
 352                                                 app_stats.wkr.enqueue_failed_pkts);
 353
 354         printf("\nTX stats:\n");
 355         printf(" - Pkts deqd from tx ring:              %"PRIu64"\n",
 356                                                 app_stats.tx.dequeue_pkts);
 357         printf(" - Ro Pkts transmitted:                 %"PRIu64"\n",
 358                                                 app_stats.tx.ro_tx_pkts);
 359         printf(" - Ro Pkts tx failed:                   %"PRIu64"\n",
 360                                                 app_stats.tx.ro_tx_failed_pkts);
 361         printf(" - Pkts transmitted w/o reorder:        %"PRIu64"\n",
 362                                                 app_stats.tx.early_pkts_txtd_woro);
 363         printf(" - Pkts tx failed w/o reorder:          %"PRIu64"\n",
 364                                                 app_stats.tx.early_pkts_tx_failed_woro);
 365
 366         for (i = 0; i < nb_ports; i++) {
 367                 rte_eth_stats_get(i, &eth_stats);
 368                 printf("\nPort %u stats:\n", i);
 369                 printf(" - Pkts in:   %"PRIu64"\n", eth_stats.ipackets);
 370                 printf(" - Pkts out:  %"PRIu64"\n", eth_stats.opackets);
 371                 printf(" - In Errs:   %"PRIu64"\n", eth_stats.ierrors);
 372                 printf(" - Out Errs:  %"PRIu64"\n", eth_stats.oerrors);
 373                 printf(" - Mbuf Errs: %"PRIu64"\n", eth_stats.rx_nombuf);
 374         }
 375 }
 376
 377 static void
 378 int_handler(int sig_num)
 379 {
 380         printf("Exiting on signal %d\n", sig_num);
 381         quit_signal = 1;
 382 }
 383
 384 /**
 385  * This thread receives mbufs from the port and affects them an internal
 386  * sequence number to keep track of their order of arrival through an
 387  * mbuf structure.
 388  * The mbufs are then passed to the worker threads via the rx_to_workers
 389  * ring.
 390  */
 391 static int
 392 rx_thread(struct rte_ring *ring_out)
 393 {
 394         const uint8_t nb_ports = rte_eth_dev_count();
 395         uint32_t seqn = 0;
 396         uint16_t i, ret = 0;
 397         uint16_t nb_rx_pkts;
 398         uint8_t port_id;
 399         struct rte_mbuf *pkts[MAX_PKTS_BURST];
 400
 401         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 402                                                         rte_lcore_id());
 403
 404         while (!quit_signal) {
 405
 406                 for (port_id = 0; port_id < nb_ports; port_id++) {
 407                         if ((portmask & (1 << port_id)) != 0) {
 408
 409                                 /* receive packets */
 410                                 nb_rx_pkts = rte_eth_rx_burst(port_id, 0,
 411                                                                 pkts, MAX_PKTS_BURST);
 412                                 if (nb_rx_pkts == 0) {
 413                                         RTE_LOG(DEBUG, REORDERAPP,
 414                                         "%s():Received zero packets\n", __func__);
 415                                         continue;
 416                                 }
 417                                 app_stats.rx.rx_pkts += nb_rx_pkts;
 418
 419                                 /* mark sequence number */
 420                                 for (i = 0; i < nb_rx_pkts; )
 421                                         pkts[i++]->seqn = seqn++;
 422
 423                                 /* enqueue to rx_to_workers ring */
 424                                 ret = rte_ring_enqueue_burst(ring_out, (void *) pkts,
 425                                                                 nb_rx_pkts);
 426                                 app_stats.rx.enqueue_pkts += ret;
 427                                 if (unlikely(ret < nb_rx_pkts)) {
 428                                         app_stats.rx.enqueue_failed_pkts +=
 429                                                                         (nb_rx_pkts-ret);
 430                                         pktmbuf_free_bulk(&pkts[ret], nb_rx_pkts - ret);
 431                                 }
 432                         }
 433                 }
 434         }
 435         return 0;
 436 }
 437
 438 /**
 439  * This thread takes bursts of packets from the rx_to_workers ring and
 440  * Changes the input port value to output port value. And feds it to
 441  * workers_to_tx
 442  */
 443 static int
 444 worker_thread(void *args_ptr)
 445 {
 446         const uint8_t nb_ports = rte_eth_dev_count();
 447         uint16_t i, ret = 0;
 448         uint16_t burst_size = 0;
 449         struct worker_thread_args *args;
 450         struct rte_mbuf *burst_buffer[MAX_PKTS_BURST] = { NULL };
 451         struct rte_ring *ring_in, *ring_out;
 452         const unsigned xor_val = (nb_ports > 1);
 453
 454         args = (struct worker_thread_args *) args_ptr;
 455         ring_in  = args->ring_in;
 456         ring_out = args->ring_out;
 457
 458         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 459                                                         rte_lcore_id());
 460
 461         while (!quit_signal) {
 462
 463                 /* dequeue the mbufs from rx_to_workers ring */
 464                 burst_size = rte_ring_dequeue_burst(ring_in,
 465                                 (void *)burst_buffer, MAX_PKTS_BURST);
 466                 if (unlikely(burst_size == 0))
 467                         continue;
 468
 469                 __sync_fetch_and_add(&app_stats.wkr.dequeue_pkts, burst_size);
 470
 471                 /* just do some operation on mbuf */
 472                 for (i = 0; i < burst_size;)
 473                         burst_buffer[i++]->port ^= xor_val;
 474
 475                 /* enqueue the modified mbufs to workers_to_tx ring */
 476                 ret = rte_ring_enqueue_burst(ring_out, (void *)burst_buffer, burst_size);
 477                 __sync_fetch_and_add(&app_stats.wkr.enqueue_pkts, ret);
 478                 if (unlikely(ret < burst_size)) {
 479                         /* Return the mbufs to their respective pool, dropping packets */
 480                         __sync_fetch_and_add(&app_stats.wkr.enqueue_failed_pkts,
 481                                         (int)burst_size - ret);
 482                         pktmbuf_free_bulk(&burst_buffer[ret], burst_size - ret);
 483                 }
 484         }
 485         return 0;
 486 }
 487
 488 /**
 489  * Dequeue mbufs from the workers_to_tx ring and reorder them before
 490  * transmitting.
 491  */
 492 static int
 493 send_thread(struct send_thread_args *args)
 494 {
 495         int ret;
 496         unsigned int i, dret;
 497         uint16_t nb_dq_mbufs;
 498         uint8_t outp;
 499         unsigned sent;
 500         struct rte_mbuf *mbufs[MAX_PKTS_BURST];
 501         struct rte_mbuf *rombufs[MAX_PKTS_BURST] = {NULL};
 502         static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
 503
 504         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__, rte_lcore_id());
 505
 506         configure_tx_buffers(tx_buffer);
 507
 508         while (!quit_signal) {
 509
 510                 /* deque the mbufs from workers_to_tx ring */
 511                 nb_dq_mbufs = rte_ring_dequeue_burst(args->ring_in,
 512                                 (void *)mbufs, MAX_PKTS_BURST);
 513
 514                 if (unlikely(nb_dq_mbufs == 0))
 515                         continue;
 516
 517                 app_stats.tx.dequeue_pkts += nb_dq_mbufs;
 518
 519                 for (i = 0; i < nb_dq_mbufs; i++) {
 520                         /* send dequeued mbufs for reordering */
 521                         ret = rte_reorder_insert(args->buffer, mbufs[i]);
 522
 523                         if (ret == -1 && rte_errno == ERANGE) {
 524                                 /* Too early pkts should be transmitted out directly */
 525                                 RTE_LOG(DEBUG, REORDERAPP,
 526                                                 "%s():Cannot reorder early packet "
 527                                                 "direct enqueuing to TX\n", __func__);
 528                                 outp = mbufs[i]->port;
 529                                 if ((portmask & (1 << outp)) == 0) {
 530                                         rte_pktmbuf_free(mbufs[i]);
 531                                         continue;
 532                                 }
 533                                 if (rte_eth_tx_burst(outp, 0, (void *)mbufs[i], 1) != 1) {
 534                                         rte_pktmbuf_free(mbufs[i]);
 535                                         app_stats.tx.early_pkts_tx_failed_woro++;
 536                                 } else
 537                                         app_stats.tx.early_pkts_txtd_woro++;
 538                         } else if (ret == -1 && rte_errno == ENOSPC) {
 539                                 /**
 540                                  * Early pkts just outside of window should be dropped
 541                                  */
 542                                 rte_pktmbuf_free(mbufs[i]);
 543                         }
 544                 }
 545
 546                 /*
 547                  * drain MAX_PKTS_BURST of reordered
 548                  * mbufs for transmit
 549                  */
 550                 dret = rte_reorder_drain(args->buffer, rombufs, MAX_PKTS_BURST);
 551                 for (i = 0; i < dret; i++) {
 552
 553                         struct rte_eth_dev_tx_buffer *outbuf;
 554                         uint8_t outp1;
 555
 556                         outp1 = rombufs[i]->port;
 557                         /* skip ports that are not enabled */
 558                         if ((portmask & (1 << outp1)) == 0) {
 559                                 rte_pktmbuf_free(rombufs[i]);
 560                                 continue;
 561                         }
 562
 563                         outbuf = tx_buffer[outp1];
 564                         sent = rte_eth_tx_buffer(outp1, 0, outbuf, rombufs[i]);
 565                         if (sent)
 566                                 app_stats.tx.ro_tx_pkts += sent;
 567                 }
 568         }
 569
 570         free_tx_buffers(tx_buffer);
 571
 572         return 0;
 573 }
 574
 575 /**
 576  * Dequeue mbufs from the workers_to_tx ring and transmit them
 577  */
 578 static int
 579 tx_thread(struct rte_ring *ring_in)
 580 {
 581         uint32_t i, dqnum;
 582         uint8_t outp;
 583         unsigned sent;
 584         struct rte_mbuf *mbufs[MAX_PKTS_BURST];
 585         struct rte_eth_dev_tx_buffer *outbuf;
 586         static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
 587
 588         RTE_LOG(INFO, REORDERAPP, "%s() started on lcore %u\n", __func__,
 589                                                         rte_lcore_id());
 590
 591         configure_tx_buffers(tx_buffer);
 592
 593         while (!quit_signal) {
 594
 595                 /* deque the mbufs from workers_to_tx ring */
 596                 dqnum = rte_ring_dequeue_burst(ring_in,
 597                                 (void *)mbufs, MAX_PKTS_BURST);
 598
 599                 if (unlikely(dqnum == 0))
 600                         continue;
 601
 602                 app_stats.tx.dequeue_pkts += dqnum;
 603
 604                 for (i = 0; i < dqnum; i++) {
 605                         outp = mbufs[i]->port;
 606                         /* skip ports that are not enabled */
 607                         if ((portmask & (1 << outp)) == 0) {
 608                                 rte_pktmbuf_free(mbufs[i]);
 609                                 continue;
 610                         }
 611
 612                         outbuf = tx_buffer[outp];
 613                         sent = rte_eth_tx_buffer(outp, 0, outbuf, mbufs[i]);
 614                         if (sent)
 615                                 app_stats.tx.ro_tx_pkts += sent;
 616                 }
 617         }
 618
 619         return 0;
 620 }
 621
 622 int
 623 main(int argc, char **argv)
 624 {
 625         int ret;
 626         unsigned nb_ports;
 627         unsigned int lcore_id, last_lcore_id, master_lcore_id;
 628         uint8_t port_id;
 629         uint8_t nb_ports_available;
 630         struct worker_thread_args worker_args = {NULL, NULL};
 631         struct send_thread_args send_args = {NULL, NULL};
 632         struct rte_ring *rx_to_workers;
 633         struct rte_ring *workers_to_tx;
 634
 635         /* catch ctrl-c so we can print on exit */
 636         signal(SIGINT, int_handler);
 637
 638         /* Initialize EAL */
 639         ret = rte_eal_init(argc, argv);
 640         if (ret < 0)
 641                 return -1;
 642
 643         argc -= ret;
 644         argv += ret;
 645
 646         /* Parse the application specific arguments */
 647         ret = parse_args(argc, argv);
 648         if (ret < 0)
 649                 return -1;
 650
 651         /* Check if we have enought cores */
 652         if (rte_lcore_count() < 3)
 653                 rte_exit(EXIT_FAILURE, "Error, This application needs at "
 654                                 "least 3 logical cores to run:\n"
 655                                 "1 lcore for packet RX\n"
 656                                 "1 lcore for packet TX\n"
 657                                 "and at least 1 lcore for worker threads\n");
 658
 659         nb_ports = rte_eth_dev_count();
 660         if (nb_ports == 0)
 661                 rte_exit(EXIT_FAILURE, "Error: no ethernet ports detected\n");
 662         if (nb_ports != 1 && (nb_ports & 1))
 663                 rte_exit(EXIT_FAILURE, "Error: number of ports must be even, except "
 664                                 "when using a single port\n");
 665
 666         mbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", MBUF_PER_POOL,
 667                         MBUF_POOL_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE,
 668                         rte_socket_id());
 669         if (mbuf_pool == NULL)
 670                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 671
 672         nb_ports_available = nb_ports;
 673
 674         /* initialize all ports */
 675         for (port_id = 0; port_id < nb_ports; port_id++) {
 676                 /* skip ports that are not enabled */
 677                 if ((portmask & (1 << port_id)) == 0) {
 678                         printf("\nSkipping disabled port %d\n", port_id);
 679                         nb_ports_available--;
 680                         continue;
 681                 }
 682                 /* init port */
 683                 printf("Initializing port %u... done\n", (unsigned) port_id);
 684
 685                 if (configure_eth_port(port_id) != 0)
 686                         rte_exit(EXIT_FAILURE, "Cannot initialize port %"PRIu8"\n",
 687                                         port_id);
 688         }
 689
 690         if (!nb_ports_available) {
 691                 rte_exit(EXIT_FAILURE,
 692                         "All available ports are disabled. Please set portmask.\n");
 693         }
 694
 695         /* Create rings for inter core communication */
 696         rx_to_workers = rte_ring_create("rx_to_workers", RING_SIZE, rte_socket_id(),
 697                         RING_F_SP_ENQ);
 698         if (rx_to_workers == NULL)
 699                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 700
 701         workers_to_tx = rte_ring_create("workers_to_tx", RING_SIZE, rte_socket_id(),
 702                         RING_F_SC_DEQ);
 703         if (workers_to_tx == NULL)
 704                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 705
 706         if (!disable_reorder) {
 707                 send_args.buffer = rte_reorder_create("PKT_RO", rte_socket_id(),
 708                                 REORDER_BUFFER_SIZE);
 709                 if (send_args.buffer == NULL)
 710                         rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 711         }
 712
 713         last_lcore_id   = get_last_lcore_id();
 714         master_lcore_id = rte_get_master_lcore();
 715
 716         worker_args.ring_in  = rx_to_workers;
 717         worker_args.ring_out = workers_to_tx;
 718
 719         /* Start worker_thread() on all the available slave cores but the last 1 */
 720         for (lcore_id = 0; lcore_id <= get_previous_lcore_id(last_lcore_id); lcore_id++)
 721                 if (rte_lcore_is_enabled(lcore_id) && lcore_id != master_lcore_id)
 722                         rte_eal_remote_launch(worker_thread, (void *)&worker_args,
 723                                         lcore_id);
 724
 725         if (disable_reorder) {
 726                 /* Start tx_thread() on the last slave core */
 727                 rte_eal_remote_launch((lcore_function_t *)tx_thread, workers_to_tx,
 728                                 last_lcore_id);
 729         } else {
 730                 send_args.ring_in = workers_to_tx;
 731                 /* Start send_thread() on the last slave core */
 732                 rte_eal_remote_launch((lcore_function_t *)send_thread,
 733                                 (void *)&send_args, last_lcore_id);
 734         }
 735
 736         /* Start rx_thread() on the master core */
 737         rx_thread(rx_to_workers);
 738
 739         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 740                 if (rte_eal_wait_lcore(lcore_id) < 0)
 741                         return -1;
 742         }
 743
 744         print_stats();
 745         return 0;
 746 }