examples/distributor/main.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2017 Intel Corporation
   3  */
   4
   5 #include <stdint.h>
   6 #include <inttypes.h>
   7 #include <unistd.h>
   8 #include <signal.h>
   9 #include <getopt.h>
  10
  11 #include <rte_eal.h>
  12 #include <rte_ethdev.h>
  13 #include <rte_cycles.h>
  14 #include <rte_malloc.h>
  15 #include <rte_debug.h>
  16 #include <rte_prefetch.h>
  17 #include <rte_distributor.h>
  18 #include <rte_pause.h>
  19 #include <rte_power.h>
  20
  21 #define RX_RING_SIZE 1024
  22 #define TX_RING_SIZE 1024
  23 #define NUM_MBUFS ((64*1024)-1)
  24 #define MBUF_CACHE_SIZE 128
  25 #define BURST_SIZE 64
  26 #define SCHED_RX_RING_SZ 8192
  27 #define SCHED_TX_RING_SZ 65536
  28 #define BURST_SIZE_TX 32
  29
  30 #define RTE_LOGTYPE_DISTRAPP RTE_LOGTYPE_USER1
  31
  32 #define ANSI_COLOR_RED     "\x1b[31m"
  33 #define ANSI_COLOR_RESET   "\x1b[0m"
  34
  35 /* mask of enabled ports */
  36 static uint32_t enabled_port_mask;
  37 volatile uint8_t quit_signal;
  38 volatile uint8_t quit_signal_rx;
  39 volatile uint8_t quit_signal_dist;
  40 volatile uint8_t quit_signal_work;
  41 unsigned int power_lib_initialised;
  42
  43 static volatile struct app_stats {
  44         struct {
  45                 uint64_t rx_pkts;
  46                 uint64_t returned_pkts;
  47                 uint64_t enqueued_pkts;
  48                 uint64_t enqdrop_pkts;
  49         } rx __rte_cache_aligned;
  50         int pad1 __rte_cache_aligned;
  51
  52         struct {
  53                 uint64_t in_pkts;
  54                 uint64_t ret_pkts;
  55                 uint64_t sent_pkts;
  56                 uint64_t enqdrop_pkts;
  57         } dist __rte_cache_aligned;
  58         int pad2 __rte_cache_aligned;
  59
  60         struct {
  61                 uint64_t dequeue_pkts;
  62                 uint64_t tx_pkts;
  63                 uint64_t enqdrop_pkts;
  64         } tx __rte_cache_aligned;
  65         int pad3 __rte_cache_aligned;
  66
  67         uint64_t worker_pkts[64] __rte_cache_aligned;
  68
  69         int pad4 __rte_cache_aligned;
  70
  71         uint64_t worker_bursts[64][8] __rte_cache_aligned;
  72
  73         int pad5 __rte_cache_aligned;
  74
  75         uint64_t port_rx_pkts[64] __rte_cache_aligned;
  76         uint64_t port_tx_pkts[64] __rte_cache_aligned;
  77 } app_stats;
  78
  79 struct app_stats prev_app_stats;
  80
  81 static const struct rte_eth_conf port_conf_default = {
  82         .rxmode = {
  83                 .mq_mode = ETH_MQ_RX_RSS,
  84                 .max_rx_pkt_len = RTE_ETHER_MAX_LEN,
  85         },
  86         .txmode = {
  87                 .mq_mode = ETH_MQ_TX_NONE,
  88         },
  89         .rx_adv_conf = {
  90                 .rss_conf = {
  91                         .rss_hf = ETH_RSS_IP | ETH_RSS_UDP |
  92                                 ETH_RSS_TCP | ETH_RSS_SCTP,
  93                 }
  94         },
  95 };
  96
  97 struct output_buffer {
  98         unsigned count;
  99         struct rte_mbuf *mbufs[BURST_SIZE];
 100 };
 101
 102 static void print_stats(void);
 103
 104 /*
 105  * Initialises a given port using global settings and with the rx buffers
 106  * coming from the mbuf_pool passed as parameter
 107  */
 108 static inline int
 109 port_init(uint16_t port, struct rte_mempool *mbuf_pool)
 110 {
 111         struct rte_eth_conf port_conf = port_conf_default;
 112         const uint16_t rxRings = 1, txRings = rte_lcore_count() - 1;
 113         int retval;
 114         uint16_t q;
 115         uint16_t nb_rxd = RX_RING_SIZE;
 116         uint16_t nb_txd = TX_RING_SIZE;
 117         struct rte_eth_dev_info dev_info;
 118         struct rte_eth_txconf txconf;
 119
 120         if (!rte_eth_dev_is_valid_port(port))
 121                 return -1;
 122
 123         retval = rte_eth_dev_info_get(port, &dev_info);
 124         if (retval != 0) {
 125                 printf("Error during getting device (port %u) info: %s\n",
 126                                 port, strerror(-retval));
 127                 return retval;
 128         }
 129
 130         if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
 131                 port_conf.txmode.offloads |=
 132                         DEV_TX_OFFLOAD_MBUF_FAST_FREE;
 133
 134         port_conf.rx_adv_conf.rss_conf.rss_hf &=
 135                 dev_info.flow_type_rss_offloads;
 136         if (port_conf.rx_adv_conf.rss_conf.rss_hf !=
 137                         port_conf_default.rx_adv_conf.rss_conf.rss_hf) {
 138                 printf("Port %u modified RSS hash function based on hardware support,"
 139                         "requested:%#"PRIx64" configured:%#"PRIx64"\n",
 140                         port,
 141                         port_conf_default.rx_adv_conf.rss_conf.rss_hf,
 142                         port_conf.rx_adv_conf.rss_conf.rss_hf);
 143         }
 144
 145         retval = rte_eth_dev_configure(port, rxRings, txRings, &port_conf);
 146         if (retval != 0)
 147                 return retval;
 148
 149         retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
 150         if (retval != 0)
 151                 return retval;
 152
 153         for (q = 0; q < rxRings; q++) {
 154                 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
 155                                                 rte_eth_dev_socket_id(port),
 156                                                 NULL, mbuf_pool);
 157                 if (retval < 0)
 158                         return retval;
 159         }
 160
 161         txconf = dev_info.default_txconf;
 162         txconf.offloads = port_conf.txmode.offloads;
 163         for (q = 0; q < txRings; q++) {
 164                 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
 165                                                 rte_eth_dev_socket_id(port),
 166                                                 &txconf);
 167                 if (retval < 0)
 168                         return retval;
 169         }
 170
 171         retval = rte_eth_dev_start(port);
 172         if (retval < 0)
 173                 return retval;
 174
 175         struct rte_eth_link link;
 176         do {
 177                 retval = rte_eth_link_get_nowait(port, &link);
 178                 if (retval < 0) {
 179                         printf("Failed link get (port %u): %s\n",
 180                                 port, rte_strerror(-retval));
 181                         return retval;
 182                 } else if (link.link_status)
 183                         break;
 184
 185                 printf("Waiting for Link up on port %"PRIu16"\n", port);
 186                 sleep(1);
 187         } while (!link.link_status);
 188
 189         if (!link.link_status) {
 190                 printf("Link down on port %"PRIu16"\n", port);
 191                 return 0;
 192         }
 193
 194         struct rte_ether_addr addr;
 195         retval = rte_eth_macaddr_get(port, &addr);
 196         if (retval < 0) {
 197                 printf("Failed to get MAC address (port %u): %s\n",
 198                                 port, rte_strerror(-retval));
 199                 return retval;
 200         }
 201
 202         printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
 203                         " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
 204                         port,
 205                         addr.addr_bytes[0], addr.addr_bytes[1],
 206                         addr.addr_bytes[2], addr.addr_bytes[3],
 207                         addr.addr_bytes[4], addr.addr_bytes[5]);
 208
 209         retval = rte_eth_promiscuous_enable(port);
 210         if (retval != 0)
 211                 return retval;
 212
 213         return 0;
 214 }
 215
 216 struct lcore_params {
 217         unsigned worker_id;
 218         struct rte_distributor *d;
 219         struct rte_ring *rx_dist_ring;
 220         struct rte_ring *dist_tx_ring;
 221         struct rte_mempool *mem_pool;
 222 };
 223
 224 static int
 225 lcore_rx(struct lcore_params *p)
 226 {
 227         const uint16_t nb_ports = rte_eth_dev_count_avail();
 228         const int socket_id = rte_socket_id();
 229         uint16_t port;
 230         struct rte_mbuf *bufs[BURST_SIZE*2];
 231
 232         RTE_ETH_FOREACH_DEV(port) {
 233                 /* skip ports that are not enabled */
 234                 if ((enabled_port_mask & (1 << port)) == 0)
 235                         continue;
 236
 237                 if (rte_eth_dev_socket_id(port) > 0 &&
 238                                 rte_eth_dev_socket_id(port) != socket_id)
 239                         printf("WARNING, port %u is on remote NUMA node to "
 240                                         "RX thread.\n\tPerformance will not "
 241                                         "be optimal.\n", port);
 242         }
 243
 244         printf("\nCore %u doing packet RX.\n", rte_lcore_id());
 245         port = 0;
 246         while (!quit_signal_rx) {
 247
 248                 /* skip ports that are not enabled */
 249                 if ((enabled_port_mask & (1 << port)) == 0) {
 250                         if (++port == nb_ports)
 251                                 port = 0;
 252                         continue;
 253                 }
 254                 const uint16_t nb_rx = rte_eth_rx_burst(port, 0, bufs,
 255                                 BURST_SIZE);
 256                 if (unlikely(nb_rx == 0)) {
 257                         if (++port == nb_ports)
 258                                 port = 0;
 259                         continue;
 260                 }
 261                 app_stats.rx.rx_pkts += nb_rx;
 262
 263 /*
 264  * You can run the distributor on the rx core with this code. Returned
 265  * packets are then send straight to the tx core.
 266  */
 267 #if 0
 268         rte_distributor_process(d, bufs, nb_rx);
 269         const uint16_t nb_ret = rte_distributor_returned_pktsd,
 270                         bufs, BURST_SIZE*2);
 271
 272                 app_stats.rx.returned_pkts += nb_ret;
 273                 if (unlikely(nb_ret == 0)) {
 274                         if (++port == nb_ports)
 275                                 port = 0;
 276                         continue;
 277                 }
 278
 279                 struct rte_ring *tx_ring = p->dist_tx_ring;
 280                 uint16_t sent = rte_ring_enqueue_burst(tx_ring,
 281                                 (void *)bufs, nb_ret, NULL);
 282 #else
 283                 uint16_t nb_ret = nb_rx;
 284                 /*
 285                  * Swap the following two lines if you want the rx traffic
 286                  * to go directly to tx, no distribution.
 287                  */
 288                 struct rte_ring *out_ring = p->rx_dist_ring;
 289                 /* struct rte_ring *out_ring = p->dist_tx_ring; */
 290
 291                 uint16_t sent = rte_ring_enqueue_burst(out_ring,
 292                                 (void *)bufs, nb_ret, NULL);
 293 #endif
 294
 295                 app_stats.rx.enqueued_pkts += sent;
 296                 if (unlikely(sent < nb_ret)) {
 297                         app_stats.rx.enqdrop_pkts +=  nb_ret - sent;
 298                         RTE_LOG_DP(DEBUG, DISTRAPP,
 299                                 "%s:Packet loss due to full ring\n", __func__);
 300                         while (sent < nb_ret)
 301                                 rte_pktmbuf_free(bufs[sent++]);
 302                 }
 303                 if (++port == nb_ports)
 304                         port = 0;
 305         }
 306         if (power_lib_initialised)
 307                 rte_power_exit(rte_lcore_id());
 308         /* set worker & tx threads quit flag */
 309         printf("\nCore %u exiting rx task.\n", rte_lcore_id());
 310         quit_signal = 1;
 311         return 0;
 312 }
 313
 314 static inline void
 315 flush_one_port(struct output_buffer *outbuf, uint8_t outp)
 316 {
 317         unsigned int nb_tx = rte_eth_tx_burst(outp, 0,
 318                         outbuf->mbufs, outbuf->count);
 319         app_stats.tx.tx_pkts += outbuf->count;
 320
 321         if (unlikely(nb_tx < outbuf->count)) {
 322                 app_stats.tx.enqdrop_pkts +=  outbuf->count - nb_tx;
 323                 do {
 324                         rte_pktmbuf_free(outbuf->mbufs[nb_tx]);
 325                 } while (++nb_tx < outbuf->count);
 326         }
 327         outbuf->count = 0;
 328 }
 329
 330 static inline void
 331 flush_all_ports(struct output_buffer *tx_buffers)
 332 {
 333         uint16_t outp;
 334
 335         RTE_ETH_FOREACH_DEV(outp) {
 336                 /* skip ports that are not enabled */
 337                 if ((enabled_port_mask & (1 << outp)) == 0)
 338                         continue;
 339
 340                 if (tx_buffers[outp].count == 0)
 341                         continue;
 342
 343                 flush_one_port(&tx_buffers[outp], outp);
 344         }
 345 }
 346
 347
 348
 349 static int
 350 lcore_distributor(struct lcore_params *p)
 351 {
 352         struct rte_ring *in_r = p->rx_dist_ring;
 353         struct rte_ring *out_r = p->dist_tx_ring;
 354         struct rte_mbuf *bufs[BURST_SIZE * 4];
 355         struct rte_distributor *d = p->d;
 356
 357         printf("\nCore %u acting as distributor core.\n", rte_lcore_id());
 358         while (!quit_signal_dist) {
 359                 const uint16_t nb_rx = rte_ring_dequeue_burst(in_r,
 360                                 (void *)bufs, BURST_SIZE*1, NULL);
 361                 if (nb_rx) {
 362                         app_stats.dist.in_pkts += nb_rx;
 363
 364                         /* Distribute the packets */
 365                         rte_distributor_process(d, bufs, nb_rx);
 366                         /* Handle Returns */
 367                         const uint16_t nb_ret =
 368                                 rte_distributor_returned_pkts(d,
 369                                         bufs, BURST_SIZE*2);
 370
 371                         if (unlikely(nb_ret == 0))
 372                                 continue;
 373                         app_stats.dist.ret_pkts += nb_ret;
 374
 375                         uint16_t sent = rte_ring_enqueue_burst(out_r,
 376                                         (void *)bufs, nb_ret, NULL);
 377                         app_stats.dist.sent_pkts += sent;
 378                         if (unlikely(sent < nb_ret)) {
 379                                 app_stats.dist.enqdrop_pkts += nb_ret - sent;
 380                                 RTE_LOG(DEBUG, DISTRAPP,
 381                                         "%s:Packet loss due to full out ring\n",
 382                                         __func__);
 383                                 while (sent < nb_ret)
 384                                         rte_pktmbuf_free(bufs[sent++]);
 385                         }
 386                 }
 387         }
 388         printf("\nCore %u exiting distributor task.\n", rte_lcore_id());
 389         quit_signal_work = 1;
 390         if (power_lib_initialised)
 391                 rte_power_exit(rte_lcore_id());
 392         rte_distributor_flush(d);
 393         /* Unblock any returns so workers can exit */
 394         rte_distributor_clear_returns(d);
 395         quit_signal_rx = 1;
 396         return 0;
 397 }
 398
 399
 400 static int
 401 lcore_tx(struct rte_ring *in_r)
 402 {
 403         static struct output_buffer tx_buffers[RTE_MAX_ETHPORTS];
 404         const int socket_id = rte_socket_id();
 405         uint16_t port;
 406
 407         RTE_ETH_FOREACH_DEV(port) {
 408                 /* skip ports that are not enabled */
 409                 if ((enabled_port_mask & (1 << port)) == 0)
 410                         continue;
 411
 412                 if (rte_eth_dev_socket_id(port) > 0 &&
 413                                 rte_eth_dev_socket_id(port) != socket_id)
 414                         printf("WARNING, port %u is on remote NUMA node to "
 415                                         "TX thread.\n\tPerformance will not "
 416                                         "be optimal.\n", port);
 417         }
 418
 419         printf("\nCore %u doing packet TX.\n", rte_lcore_id());
 420         while (!quit_signal) {
 421
 422                 RTE_ETH_FOREACH_DEV(port) {
 423                         /* skip ports that are not enabled */
 424                         if ((enabled_port_mask & (1 << port)) == 0)
 425                                 continue;
 426
 427                         struct rte_mbuf *bufs[BURST_SIZE_TX];
 428                         const uint16_t nb_rx = rte_ring_dequeue_burst(in_r,
 429                                         (void *)bufs, BURST_SIZE_TX, NULL);
 430                         app_stats.tx.dequeue_pkts += nb_rx;
 431
 432                         /* if we get no traffic, flush anything we have */
 433                         if (unlikely(nb_rx == 0)) {
 434                                 flush_all_ports(tx_buffers);
 435                                 continue;
 436                         }
 437
 438                         /* for traffic we receive, queue it up for transmit */
 439                         uint16_t i;
 440                         rte_prefetch_non_temporal((void *)bufs[0]);
 441                         rte_prefetch_non_temporal((void *)bufs[1]);
 442                         rte_prefetch_non_temporal((void *)bufs[2]);
 443                         for (i = 0; i < nb_rx; i++) {
 444                                 struct output_buffer *outbuf;
 445                                 uint8_t outp;
 446                                 rte_prefetch_non_temporal((void *)bufs[i + 3]);
 447                                 /*
 448                                  * workers should update in_port to hold the
 449                                  * output port value
 450                                  */
 451                                 outp = bufs[i]->port;
 452                                 /* skip ports that are not enabled */
 453                                 if ((enabled_port_mask & (1 << outp)) == 0)
 454                                         continue;
 455
 456                                 outbuf = &tx_buffers[outp];
 457                                 outbuf->mbufs[outbuf->count++] = bufs[i];
 458                                 if (outbuf->count == BURST_SIZE_TX)
 459                                         flush_one_port(outbuf, outp);
 460                         }
 461                 }
 462         }
 463         if (power_lib_initialised)
 464                 rte_power_exit(rte_lcore_id());
 465         printf("\nCore %u exiting tx task.\n", rte_lcore_id());
 466         return 0;
 467 }
 468
 469 static void
 470 int_handler(int sig_num)
 471 {
 472         printf("Exiting on signal %d\n", sig_num);
 473         /* set quit flag for rx thread to exit */
 474         quit_signal_dist = 1;
 475 }
 476
 477 static void
 478 print_stats(void)
 479 {
 480         struct rte_eth_stats eth_stats;
 481         unsigned int i, j;
 482         const unsigned int num_workers = rte_lcore_count() - 4;
 483
 484         RTE_ETH_FOREACH_DEV(i) {
 485                 rte_eth_stats_get(i, &eth_stats);
 486                 app_stats.port_rx_pkts[i] = eth_stats.ipackets;
 487                 app_stats.port_tx_pkts[i] = eth_stats.opackets;
 488         }
 489
 490         printf("\n\nRX Thread:\n");
 491         RTE_ETH_FOREACH_DEV(i) {
 492                 printf("Port %u Pktsin : %5.2f\n", i,
 493                                 (app_stats.port_rx_pkts[i] -
 494                                 prev_app_stats.port_rx_pkts[i])/1000000.0);
 495                 prev_app_stats.port_rx_pkts[i] = app_stats.port_rx_pkts[i];
 496         }
 497         printf(" - Received:    %5.2f\n",
 498                         (app_stats.rx.rx_pkts -
 499                         prev_app_stats.rx.rx_pkts)/1000000.0);
 500         printf(" - Returned:    %5.2f\n",
 501                         (app_stats.rx.returned_pkts -
 502                         prev_app_stats.rx.returned_pkts)/1000000.0);
 503         printf(" - Enqueued:    %5.2f\n",
 504                         (app_stats.rx.enqueued_pkts -
 505                         prev_app_stats.rx.enqueued_pkts)/1000000.0);
 506         printf(" - Dropped:     %s%5.2f%s\n", ANSI_COLOR_RED,
 507                         (app_stats.rx.enqdrop_pkts -
 508                         prev_app_stats.rx.enqdrop_pkts)/1000000.0,
 509                         ANSI_COLOR_RESET);
 510
 511         printf("Distributor thread:\n");
 512         printf(" - In:          %5.2f\n",
 513                         (app_stats.dist.in_pkts -
 514                         prev_app_stats.dist.in_pkts)/1000000.0);
 515         printf(" - Returned:    %5.2f\n",
 516                         (app_stats.dist.ret_pkts -
 517                         prev_app_stats.dist.ret_pkts)/1000000.0);
 518         printf(" - Sent:        %5.2f\n",
 519                         (app_stats.dist.sent_pkts -
 520                         prev_app_stats.dist.sent_pkts)/1000000.0);
 521         printf(" - Dropped      %s%5.2f%s\n", ANSI_COLOR_RED,
 522                         (app_stats.dist.enqdrop_pkts -
 523                         prev_app_stats.dist.enqdrop_pkts)/1000000.0,
 524                         ANSI_COLOR_RESET);
 525
 526         printf("TX thread:\n");
 527         printf(" - Dequeued:    %5.2f\n",
 528                         (app_stats.tx.dequeue_pkts -
 529                         prev_app_stats.tx.dequeue_pkts)/1000000.0);
 530         RTE_ETH_FOREACH_DEV(i) {
 531                 printf("Port %u Pktsout: %5.2f\n",
 532                                 i, (app_stats.port_tx_pkts[i] -
 533                                 prev_app_stats.port_tx_pkts[i])/1000000.0);
 534                 prev_app_stats.port_tx_pkts[i] = app_stats.port_tx_pkts[i];
 535         }
 536         printf(" - Transmitted: %5.2f\n",
 537                         (app_stats.tx.tx_pkts -
 538                         prev_app_stats.tx.tx_pkts)/1000000.0);
 539         printf(" - Dropped:     %s%5.2f%s\n", ANSI_COLOR_RED,
 540                         (app_stats.tx.enqdrop_pkts -
 541                         prev_app_stats.tx.enqdrop_pkts)/1000000.0,
 542                         ANSI_COLOR_RESET);
 543
 544         prev_app_stats.rx.rx_pkts = app_stats.rx.rx_pkts;
 545         prev_app_stats.rx.returned_pkts = app_stats.rx.returned_pkts;
 546         prev_app_stats.rx.enqueued_pkts = app_stats.rx.enqueued_pkts;
 547         prev_app_stats.rx.enqdrop_pkts = app_stats.rx.enqdrop_pkts;
 548         prev_app_stats.dist.in_pkts = app_stats.dist.in_pkts;
 549         prev_app_stats.dist.ret_pkts = app_stats.dist.ret_pkts;
 550         prev_app_stats.dist.sent_pkts = app_stats.dist.sent_pkts;
 551         prev_app_stats.dist.enqdrop_pkts = app_stats.dist.enqdrop_pkts;
 552         prev_app_stats.tx.dequeue_pkts = app_stats.tx.dequeue_pkts;
 553         prev_app_stats.tx.tx_pkts = app_stats.tx.tx_pkts;
 554         prev_app_stats.tx.enqdrop_pkts = app_stats.tx.enqdrop_pkts;
 555
 556         for (i = 0; i < num_workers; i++) {
 557                 printf("Worker %02u Pkts: %5.2f. Bursts(1-8): ", i,
 558                                 (app_stats.worker_pkts[i] -
 559                                 prev_app_stats.worker_pkts[i])/1000000.0);
 560                 for (j = 0; j < 8; j++) {
 561                         printf("%"PRIu64" ", app_stats.worker_bursts[i][j]);
 562                         app_stats.worker_bursts[i][j] = 0;
 563                 }
 564                 printf("\n");
 565                 prev_app_stats.worker_pkts[i] = app_stats.worker_pkts[i];
 566         }
 567 }
 568
 569 static int
 570 lcore_worker(struct lcore_params *p)
 571 {
 572         struct rte_distributor *d = p->d;
 573         const unsigned id = p->worker_id;
 574         unsigned int num = 0;
 575         unsigned int i;
 576
 577         /*
 578          * for single port, xor_val will be zero so we won't modify the output
 579          * port, otherwise we send traffic from 0 to 1, 2 to 3, and vice versa
 580          */
 581         const unsigned xor_val = (rte_eth_dev_count_avail() > 1);
 582         struct rte_mbuf *buf[8] __rte_cache_aligned;
 583
 584         for (i = 0; i < 8; i++)
 585                 buf[i] = NULL;
 586
 587         app_stats.worker_pkts[p->worker_id] = 1;
 588
 589         printf("\nCore %u acting as worker core.\n", rte_lcore_id());
 590         while (!quit_signal_work) {
 591                 num = rte_distributor_get_pkt(d, id, buf, buf, num);
 592                 /* Do a little bit of work for each packet */
 593                 for (i = 0; i < num; i++) {
 594                         uint64_t t = rte_rdtsc()+100;
 595
 596                         while (rte_rdtsc() < t)
 597                                 rte_pause();
 598                         buf[i]->port ^= xor_val;
 599                 }
 600
 601                 app_stats.worker_pkts[p->worker_id] += num;
 602                 if (num > 0)
 603                         app_stats.worker_bursts[p->worker_id][num-1]++;
 604         }
 605         if (power_lib_initialised)
 606                 rte_power_exit(rte_lcore_id());
 607         rte_free(p);
 608         return 0;
 609 }
 610
 611 static int
 612 init_power_library(void)
 613 {
 614         int ret = 0, lcore_id;
 615         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 616                 /* init power management library */
 617                 ret = rte_power_init(lcore_id);
 618                 if (ret) {
 619                         RTE_LOG(ERR, POWER,
 620                                 "Library initialization failed on core %u\n",
 621                                 lcore_id);
 622                         /*
 623                          * Return on first failure, we'll fall back
 624                          * to non-power operation
 625                          */
 626                         return ret;
 627                 }
 628         }
 629         return ret;
 630 }
 631
 632 /* display usage */
 633 static void
 634 print_usage(const char *prgname)
 635 {
 636         printf("%s [EAL options] -- -p PORTMASK\n"
 637                         "  -p PORTMASK: hexadecimal bitmask of ports to configure\n",
 638                         prgname);
 639 }
 640
 641 static int
 642 parse_portmask(const char *portmask)
 643 {
 644         char *end = NULL;
 645         unsigned long pm;
 646
 647         /* parse hexadecimal string */
 648         pm = strtoul(portmask, &end, 16);
 649         if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
 650                 return 0;
 651
 652         return pm;
 653 }
 654
 655 /* Parse the argument given in the command line of the application */
 656 static int
 657 parse_args(int argc, char **argv)
 658 {
 659         int opt;
 660         char **argvopt;
 661         int option_index;
 662         char *prgname = argv[0];
 663         static struct option lgopts[] = {
 664                 {NULL, 0, 0, 0}
 665         };
 666
 667         argvopt = argv;
 668
 669         while ((opt = getopt_long(argc, argvopt, "p:",
 670                         lgopts, &option_index)) != EOF) {
 671
 672                 switch (opt) {
 673                 /* portmask */
 674                 case 'p':
 675                         enabled_port_mask = parse_portmask(optarg);
 676                         if (enabled_port_mask == 0) {
 677                                 printf("invalid portmask\n");
 678                                 print_usage(prgname);
 679                                 return -1;
 680                         }
 681                         break;
 682
 683                 default:
 684                         print_usage(prgname);
 685                         return -1;
 686                 }
 687         }
 688
 689         if (optind <= 1) {
 690                 print_usage(prgname);
 691                 return -1;
 692         }
 693
 694         argv[optind-1] = prgname;
 695
 696         optind = 1; /* reset getopt lib */
 697         return 0;
 698 }
 699
 700 /* Main function, does initialization and calls the per-lcore functions */
 701 int
 702 main(int argc, char *argv[])
 703 {
 704         struct rte_mempool *mbuf_pool;
 705         struct rte_distributor *d;
 706         struct rte_ring *dist_tx_ring;
 707         struct rte_ring *rx_dist_ring;
 708         struct rte_power_core_capabilities lcore_cap;
 709         unsigned int lcore_id, worker_id = 0;
 710         int distr_core_id = -1, rx_core_id = -1, tx_core_id = -1;
 711         unsigned nb_ports;
 712         uint16_t portid;
 713         uint16_t nb_ports_available;
 714         uint64_t t, freq;
 715
 716         /* catch ctrl-c so we can print on exit */
 717         signal(SIGINT, int_handler);
 718
 719         /* init EAL */
 720         int ret = rte_eal_init(argc, argv);
 721         if (ret < 0)
 722                 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
 723         argc -= ret;
 724         argv += ret;
 725
 726         /* parse application arguments (after the EAL ones) */
 727         ret = parse_args(argc, argv);
 728         if (ret < 0)
 729                 rte_exit(EXIT_FAILURE, "Invalid distributor parameters\n");
 730
 731         if (rte_lcore_count() < 5)
 732                 rte_exit(EXIT_FAILURE, "Error, This application needs at "
 733                                 "least 5 logical cores to run:\n"
 734                                 "1 lcore for stats (can be core 0)\n"
 735                                 "1 lcore for packet RX\n"
 736                                 "1 lcore for distribution\n"
 737                                 "1 lcore for packet TX\n"
 738                                 "and at least 1 lcore for worker threads\n");
 739
 740         if (init_power_library() == 0)
 741                 power_lib_initialised = 1;
 742
 743         nb_ports = rte_eth_dev_count_avail();
 744         if (nb_ports == 0)
 745                 rte_exit(EXIT_FAILURE, "Error: no ethernet ports detected\n");
 746         if (nb_ports != 1 && (nb_ports & 1))
 747                 rte_exit(EXIT_FAILURE, "Error: number of ports must be even, except "
 748                                 "when using a single port\n");
 749
 750         mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
 751                 NUM_MBUFS * nb_ports, MBUF_CACHE_SIZE, 0,
 752                 RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
 753         if (mbuf_pool == NULL)
 754                 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
 755         nb_ports_available = nb_ports;
 756
 757         /* initialize all ports */
 758         RTE_ETH_FOREACH_DEV(portid) {
 759                 /* skip ports that are not enabled */
 760                 if ((enabled_port_mask & (1 << portid)) == 0) {
 761                         printf("\nSkipping disabled port %d\n", portid);
 762                         nb_ports_available--;
 763                         continue;
 764                 }
 765                 /* init port */
 766                 printf("Initializing port %u... done\n", portid);
 767
 768                 if (port_init(portid, mbuf_pool) != 0)
 769                         rte_exit(EXIT_FAILURE, "Cannot initialize port %u\n",
 770                                         portid);
 771         }
 772
 773         if (!nb_ports_available) {
 774                 rte_exit(EXIT_FAILURE,
 775                                 "All available ports are disabled. Please set portmask.\n");
 776         }
 777
 778         d = rte_distributor_create("PKT_DIST", rte_socket_id(),
 779                         rte_lcore_count() - 4,
 780                         RTE_DIST_ALG_BURST);
 781         if (d == NULL)
 782                 rte_exit(EXIT_FAILURE, "Cannot create distributor\n");
 783
 784         /*
 785          * scheduler ring is read by the transmitter core, and written to
 786          * by scheduler core
 787          */
 788         dist_tx_ring = rte_ring_create("Output_ring", SCHED_TX_RING_SZ,
 789                         rte_socket_id(), RING_F_SC_DEQ | RING_F_SP_ENQ);
 790         if (dist_tx_ring == NULL)
 791                 rte_exit(EXIT_FAILURE, "Cannot create output ring\n");
 792
 793         rx_dist_ring = rte_ring_create("Input_ring", SCHED_RX_RING_SZ,
 794                         rte_socket_id(), RING_F_SC_DEQ | RING_F_SP_ENQ);
 795         if (rx_dist_ring == NULL)
 796                 rte_exit(EXIT_FAILURE, "Cannot create output ring\n");
 797
 798         if (power_lib_initialised) {
 799                 /*
 800                  * Here we'll pre-assign lcore ids to the rx, tx and
 801                  * distributor workloads if there's higher frequency
 802                  * on those cores e.g. if Turbo Boost is enabled.
 803                  * It's also worth mentioning that it will assign cores in a
 804                  * specific order, so that if there's less than three
 805                  * available, the higher frequency cores will go to the
 806                  * distributor first, then rx, then tx.
 807                  */
 808                 RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 809
 810                         rte_power_get_capabilities(lcore_id, &lcore_cap);
 811
 812                         if (lcore_cap.priority != 1)
 813                                 continue;
 814
 815                         if (distr_core_id < 0) {
 816                                 distr_core_id = lcore_id;
 817                                 printf("Distributor on priority core %d\n",
 818                                         lcore_id);
 819                                 continue;
 820                         }
 821                         if (rx_core_id < 0) {
 822                                 rx_core_id = lcore_id;
 823                                 printf("Rx on priority core %d\n",
 824                                         lcore_id);
 825                                 continue;
 826                         }
 827                         if (tx_core_id < 0) {
 828                                 tx_core_id = lcore_id;
 829                                 printf("Tx on priority core %d\n",
 830                                         lcore_id);
 831                                 continue;
 832                         }
 833                 }
 834         }
 835
 836         /*
 837          * If there's any of the key workloads left without an lcore_id
 838          * after the high performing core assignment above, pre-assign
 839          * them here.
 840          */
 841         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 842                 if (lcore_id == (unsigned int)distr_core_id ||
 843                                 lcore_id == (unsigned int)rx_core_id ||
 844                                 lcore_id == (unsigned int)tx_core_id)
 845                         continue;
 846                 if (distr_core_id < 0) {
 847                         distr_core_id = lcore_id;
 848                         printf("Distributor on core %d\n", lcore_id);
 849                         continue;
 850                 }
 851                 if (rx_core_id < 0) {
 852                         rx_core_id = lcore_id;
 853                         printf("Rx on core %d\n", lcore_id);
 854                         continue;
 855                 }
 856                 if (tx_core_id < 0) {
 857                         tx_core_id = lcore_id;
 858                         printf("Tx on core %d\n", lcore_id);
 859                         continue;
 860                 }
 861         }
 862
 863         printf(" tx id %d, dist id %d, rx id %d\n",
 864                         tx_core_id,
 865                         distr_core_id,
 866                         rx_core_id);
 867
 868         /*
 869          * Kick off all the worker threads first, avoiding the pre-assigned
 870          * lcore_ids for tx, rx and distributor workloads.
 871          */
 872         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 873                 if (lcore_id == (unsigned int)distr_core_id ||
 874                                 lcore_id == (unsigned int)rx_core_id ||
 875                                 lcore_id == (unsigned int)tx_core_id)
 876                         continue;
 877                 printf("Starting thread %d as worker, lcore_id %d\n",
 878                                 worker_id, lcore_id);
 879                 struct lcore_params *p =
 880                         rte_malloc(NULL, sizeof(*p), 0);
 881                 if (!p)
 882                         rte_panic("malloc failure\n");
 883                 *p = (struct lcore_params){worker_id++, d, rx_dist_ring,
 884                         dist_tx_ring, mbuf_pool};
 885
 886                 rte_eal_remote_launch((lcore_function_t *)lcore_worker,
 887                                 p, lcore_id);
 888         }
 889
 890         /* Start tx core */
 891         rte_eal_remote_launch((lcore_function_t *)lcore_tx,
 892                         dist_tx_ring, tx_core_id);
 893
 894         /* Start distributor core */
 895         struct lcore_params *pd =
 896                 rte_malloc(NULL, sizeof(*pd), 0);
 897         if (!pd)
 898                 rte_panic("malloc failure\n");
 899         *pd = (struct lcore_params){worker_id++, d,
 900                 rx_dist_ring, dist_tx_ring, mbuf_pool};
 901         rte_eal_remote_launch(
 902                         (lcore_function_t *)lcore_distributor,
 903                         pd, distr_core_id);
 904
 905         /* Start rx core */
 906         struct lcore_params *pr =
 907                 rte_malloc(NULL, sizeof(*pr), 0);
 908         if (!pr)
 909                 rte_panic("malloc failure\n");
 910         *pr = (struct lcore_params){worker_id++, d, rx_dist_ring,
 911                 dist_tx_ring, mbuf_pool};
 912         rte_eal_remote_launch((lcore_function_t *)lcore_rx,
 913                         pr, rx_core_id);
 914
 915         freq = rte_get_timer_hz();
 916         t = rte_rdtsc() + freq;
 917         while (!quit_signal_dist) {
 918                 if (t < rte_rdtsc()) {
 919                         print_stats();
 920                         t = rte_rdtsc() + freq;
 921                 }
 922                 usleep(1000);
 923         }
 924
 925         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 926                 if (rte_eal_wait_lcore(lcore_id) < 0)
 927                         return -1;
 928         }
 929
 930         print_stats();
 931
 932         rte_free(pd);
 933         rte_free(pr);
 934
 935         return 0;
 936 }