1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2014 Intel Corporation 3 */ 4 5 /* 6 * Sample application demostrating how to do packet I/O in a multi-process 7 * environment. The same code can be run as a primary process and as a 8 * secondary process, just with a different proc-id parameter in each case 9 * (apart from the EAL flag to indicate a secondary process). 10 * 11 * Each process will read from the same ports, given by the port-mask 12 * parameter, which should be the same in each case, just using a different 13 * queue per port as determined by the proc-id parameter. 14 */ 15 16 #include <stdio.h> 17 #include <string.h> 18 #include <stdint.h> 19 #include <stdlib.h> 20 #include <stdarg.h> 21 #include <errno.h> 22 #include <sys/queue.h> 23 #include <getopt.h> 24 #include <signal.h> 25 #include <inttypes.h> 26 27 #include <rte_common.h> 28 #include <rte_log.h> 29 #include <rte_memory.h> 30 #include <rte_launch.h> 31 #include <rte_eal.h> 32 #include <rte_per_lcore.h> 33 #include <rte_lcore.h> 34 #include <rte_atomic.h> 35 #include <rte_branch_prediction.h> 36 #include <rte_debug.h> 37 #include <rte_interrupts.h> 38 #include <rte_ether.h> 39 #include <rte_ethdev.h> 40 #include <rte_mempool.h> 41 #include <rte_memcpy.h> 42 #include <rte_mbuf.h> 43 #include <rte_string_fns.h> 44 #include <rte_cycles.h> 45 46 #define RTE_LOGTYPE_APP RTE_LOGTYPE_USER1 47 48 #define NB_MBUFS 64*1024 /* use 64k mbufs */ 49 #define MBUF_CACHE_SIZE 256 50 #define PKT_BURST 32 51 #define RX_RING_SIZE 1024 52 #define TX_RING_SIZE 1024 53 54 #define PARAM_PROC_ID "proc-id" 55 #define PARAM_NUM_PROCS "num-procs" 56 57 /* for each lcore, record the elements of the ports array to use */ 58 struct lcore_ports{ 59 unsigned start_port; 60 unsigned num_ports; 61 }; 62 63 /* structure to record the rx and tx packets. Put two per cache line as ports 64 * used in pairs */ 65 struct port_stats{ 66 unsigned rx; 67 unsigned tx; 68 unsigned drop; 69 } __rte_aligned(RTE_CACHE_LINE_SIZE / 2); 70 71 static int proc_id = -1; 72 static unsigned num_procs = 0; 73 74 static uint16_t ports[RTE_MAX_ETHPORTS]; 75 static unsigned num_ports = 0; 76 77 static struct lcore_ports lcore_ports[RTE_MAX_LCORE]; 78 static struct port_stats pstats[RTE_MAX_ETHPORTS]; 79 80 /* prints the usage statement and quits with an error message */ 81 static void 82 smp_usage(const char *prgname, const char *errmsg) 83 { 84 printf("\nError: %s\n",errmsg); 85 printf("\n%s [EAL options] -- -p <port mask> " 86 "--"PARAM_NUM_PROCS" <n>" 87 " --"PARAM_PROC_ID" <id>\n" 88 "-p : a hex bitmask indicating what ports are to be used\n" 89 "--num-procs: the number of processes which will be used\n" 90 "--proc-id : the id of the current process (id < num-procs)\n" 91 "\n", 92 prgname); 93 exit(1); 94 } 95 96 97 /* signal handler configured for SIGTERM and SIGINT to print stats on exit */ 98 static void 99 print_stats(int signum) 100 { 101 unsigned i; 102 printf("\nExiting on signal %d\n\n", signum); 103 for (i = 0; i < num_ports; i++){ 104 const uint8_t p_num = ports[i]; 105 printf("Port %u: RX - %u, TX - %u, Drop - %u\n", (unsigned)p_num, 106 pstats[p_num].rx, pstats[p_num].tx, pstats[p_num].drop); 107 } 108 exit(0); 109 } 110 111 /* Parse the argument given in the command line of the application */ 112 static int 113 smp_parse_args(int argc, char **argv) 114 { 115 int opt, ret; 116 char **argvopt; 117 int option_index; 118 uint16_t i, port_mask = 0; 119 char *prgname = argv[0]; 120 static struct option lgopts[] = { 121 {PARAM_NUM_PROCS, 1, 0, 0}, 122 {PARAM_PROC_ID, 1, 0, 0}, 123 {NULL, 0, 0, 0} 124 }; 125 126 argvopt = argv; 127 128 while ((opt = getopt_long(argc, argvopt, "p:", \ 129 lgopts, &option_index)) != EOF) { 130 131 switch (opt) { 132 case 'p': 133 port_mask = strtoull(optarg, NULL, 16); 134 break; 135 /* long options */ 136 case 0: 137 if (strncmp(lgopts[option_index].name, PARAM_NUM_PROCS, 8) == 0) 138 num_procs = atoi(optarg); 139 else if (strncmp(lgopts[option_index].name, PARAM_PROC_ID, 7) == 0) 140 proc_id = atoi(optarg); 141 break; 142 143 default: 144 smp_usage(prgname, "Cannot parse all command-line arguments\n"); 145 } 146 } 147 148 if (optind >= 0) 149 argv[optind-1] = prgname; 150 151 if (proc_id < 0) 152 smp_usage(prgname, "Invalid or missing proc-id parameter\n"); 153 if (rte_eal_process_type() == RTE_PROC_PRIMARY && num_procs == 0) 154 smp_usage(prgname, "Invalid or missing num-procs parameter\n"); 155 if (port_mask == 0) 156 smp_usage(prgname, "Invalid or missing port mask\n"); 157 158 /* get the port numbers from the port mask */ 159 RTE_ETH_FOREACH_DEV(i) 160 if(port_mask & (1 << i)) 161 ports[num_ports++] = (uint8_t)i; 162 163 ret = optind-1; 164 optind = 1; /* reset getopt lib */ 165 166 return ret; 167 } 168 169 /* 170 * Initialises a given port using global settings and with the rx buffers 171 * coming from the mbuf_pool passed as parameter 172 */ 173 static inline int 174 smp_port_init(uint16_t port, struct rte_mempool *mbuf_pool, 175 uint16_t num_queues) 176 { 177 struct rte_eth_conf port_conf = { 178 .rxmode = { 179 .mq_mode = ETH_MQ_RX_RSS, 180 .split_hdr_size = 0, 181 .offloads = DEV_RX_OFFLOAD_CHECKSUM, 182 }, 183 .rx_adv_conf = { 184 .rss_conf = { 185 .rss_key = NULL, 186 .rss_hf = ETH_RSS_IP, 187 }, 188 }, 189 .txmode = { 190 .mq_mode = ETH_MQ_TX_NONE, 191 } 192 }; 193 const uint16_t rx_rings = num_queues, tx_rings = num_queues; 194 struct rte_eth_dev_info info; 195 struct rte_eth_rxconf rxq_conf; 196 struct rte_eth_txconf txq_conf; 197 int retval; 198 uint16_t q; 199 uint16_t nb_rxd = RX_RING_SIZE; 200 uint16_t nb_txd = TX_RING_SIZE; 201 uint64_t rss_hf_tmp; 202 203 if (rte_eal_process_type() == RTE_PROC_SECONDARY) 204 return 0; 205 206 if (!rte_eth_dev_is_valid_port(port)) 207 return -1; 208 209 printf("# Initialising port %u... ", port); 210 fflush(stdout); 211 212 retval = rte_eth_dev_info_get(port, &info); 213 if (retval != 0) { 214 printf("Error during getting device (port %u) info: %s\n", 215 port, strerror(-retval)); 216 return retval; 217 } 218 219 info.default_rxconf.rx_drop_en = 1; 220 221 if (info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE) 222 port_conf.txmode.offloads |= 223 DEV_TX_OFFLOAD_MBUF_FAST_FREE; 224 225 rss_hf_tmp = port_conf.rx_adv_conf.rss_conf.rss_hf; 226 port_conf.rx_adv_conf.rss_conf.rss_hf &= info.flow_type_rss_offloads; 227 if (port_conf.rx_adv_conf.rss_conf.rss_hf != rss_hf_tmp) { 228 printf("Port %u modified RSS hash function based on hardware support," 229 "requested:%#"PRIx64" configured:%#"PRIx64"\n", 230 port, 231 rss_hf_tmp, 232 port_conf.rx_adv_conf.rss_conf.rss_hf); 233 } 234 235 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf); 236 if (retval < 0) 237 return retval; 238 239 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd); 240 if (retval < 0) 241 return retval; 242 243 rxq_conf = info.default_rxconf; 244 rxq_conf.offloads = port_conf.rxmode.offloads; 245 for (q = 0; q < rx_rings; q ++) { 246 retval = rte_eth_rx_queue_setup(port, q, nb_rxd, 247 rte_eth_dev_socket_id(port), 248 &rxq_conf, 249 mbuf_pool); 250 if (retval < 0) 251 return retval; 252 } 253 254 txq_conf = info.default_txconf; 255 txq_conf.offloads = port_conf.txmode.offloads; 256 for (q = 0; q < tx_rings; q ++) { 257 retval = rte_eth_tx_queue_setup(port, q, nb_txd, 258 rte_eth_dev_socket_id(port), 259 &txq_conf); 260 if (retval < 0) 261 return retval; 262 } 263 264 retval = rte_eth_promiscuous_enable(port); 265 if (retval != 0) 266 return retval; 267 268 retval = rte_eth_dev_start(port); 269 if (retval < 0) 270 return retval; 271 272 return 0; 273 } 274 275 /* Goes through each of the lcores and calculates what ports should 276 * be used by that core. Fills in the global lcore_ports[] array. 277 */ 278 static void 279 assign_ports_to_cores(void) 280 { 281 282 const unsigned int lcores = rte_lcore_count(); 283 const unsigned port_pairs = num_ports / 2; 284 const unsigned pairs_per_lcore = port_pairs / lcores; 285 unsigned extra_pairs = port_pairs % lcores; 286 unsigned ports_assigned = 0; 287 unsigned i; 288 289 RTE_LCORE_FOREACH(i) { 290 lcore_ports[i].start_port = ports_assigned; 291 lcore_ports[i].num_ports = pairs_per_lcore * 2; 292 if (extra_pairs > 0) { 293 lcore_ports[i].num_ports += 2; 294 extra_pairs--; 295 } 296 ports_assigned += lcore_ports[i].num_ports; 297 } 298 } 299 300 /* Main function used by the processing threads. 301 * Prints out some configuration details for the thread and then begins 302 * performing packet RX and TX. 303 */ 304 static int 305 lcore_main(void *arg __rte_unused) 306 { 307 const unsigned id = rte_lcore_id(); 308 const unsigned start_port = lcore_ports[id].start_port; 309 const unsigned end_port = start_port + lcore_ports[id].num_ports; 310 const uint16_t q_id = (uint16_t)proc_id; 311 unsigned p, i; 312 char msgbuf[256]; 313 int msgbufpos = 0; 314 315 if (start_port == end_port){ 316 printf("Lcore %u has nothing to do\n", id); 317 return 0; 318 } 319 320 /* build up message in msgbuf before printing to decrease likelihood 321 * of multi-core message interleaving. 322 */ 323 msgbufpos += snprintf(msgbuf, sizeof(msgbuf) - msgbufpos, 324 "Lcore %u using ports ", id); 325 for (p = start_port; p < end_port; p++){ 326 msgbufpos += snprintf(msgbuf + msgbufpos, sizeof(msgbuf) - msgbufpos, 327 "%u ", (unsigned)ports[p]); 328 } 329 printf("%s\n", msgbuf); 330 printf("lcore %u using queue %u of each port\n", id, (unsigned)q_id); 331 332 /* handle packet I/O from the ports, reading and writing to the 333 * queue number corresponding to our process number (not lcore id) 334 */ 335 336 for (;;) { 337 struct rte_mbuf *buf[PKT_BURST]; 338 339 for (p = start_port; p < end_port; p++) { 340 const uint8_t src = ports[p]; 341 const uint8_t dst = ports[p ^ 1]; /* 0 <-> 1, 2 <-> 3 etc */ 342 const uint16_t rx_c = rte_eth_rx_burst(src, q_id, buf, PKT_BURST); 343 if (rx_c == 0) 344 continue; 345 pstats[src].rx += rx_c; 346 347 const uint16_t tx_c = rte_eth_tx_burst(dst, q_id, buf, rx_c); 348 pstats[dst].tx += tx_c; 349 if (tx_c != rx_c) { 350 pstats[dst].drop += (rx_c - tx_c); 351 for (i = tx_c; i < rx_c; i++) 352 rte_pktmbuf_free(buf[i]); 353 } 354 } 355 } 356 } 357 358 /* Check the link status of all ports in up to 9s, and print them finally */ 359 static void 360 check_all_ports_link_status(uint16_t port_num, uint32_t port_mask) 361 { 362 #define CHECK_INTERVAL 100 /* 100ms */ 363 #define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */ 364 uint16_t portid; 365 uint8_t count, all_ports_up, print_flag = 0; 366 struct rte_eth_link link; 367 int ret; 368 char link_status_text[RTE_ETH_LINK_MAX_STR_LEN]; 369 370 printf("\nChecking link status"); 371 fflush(stdout); 372 for (count = 0; count <= MAX_CHECK_TIME; count++) { 373 all_ports_up = 1; 374 for (portid = 0; portid < port_num; portid++) { 375 if ((port_mask & (1 << portid)) == 0) 376 continue; 377 memset(&link, 0, sizeof(link)); 378 ret = rte_eth_link_get_nowait(portid, &link); 379 if (ret < 0) { 380 all_ports_up = 0; 381 if (print_flag == 1) 382 printf("Port %u link get failed: %s\n", 383 portid, rte_strerror(-ret)); 384 continue; 385 } 386 /* print link status if flag set */ 387 if (print_flag == 1) { 388 rte_eth_link_to_str(link_status_text, 389 sizeof(link_status_text), &link); 390 printf("Port %d %s\n", portid, 391 link_status_text); 392 continue; 393 } 394 /* clear all_ports_up flag if any link down */ 395 if (link.link_status == ETH_LINK_DOWN) { 396 all_ports_up = 0; 397 break; 398 } 399 } 400 /* after finally printing all link status, get out */ 401 if (print_flag == 1) 402 break; 403 404 if (all_ports_up == 0) { 405 printf("."); 406 fflush(stdout); 407 rte_delay_ms(CHECK_INTERVAL); 408 } 409 410 /* set the print_flag if all ports up or timeout */ 411 if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) { 412 print_flag = 1; 413 printf("done\n"); 414 } 415 } 416 } 417 418 /* Main function. 419 * Performs initialisation and then calls the lcore_main on each core 420 * to do the packet-processing work. 421 */ 422 int 423 main(int argc, char **argv) 424 { 425 static const char *_SMP_MBUF_POOL = "SMP_MBUF_POOL"; 426 int ret; 427 unsigned i; 428 enum rte_proc_type_t proc_type; 429 struct rte_mempool *mp; 430 431 /* set up signal handlers to print stats on exit */ 432 signal(SIGINT, print_stats); 433 signal(SIGTERM, print_stats); 434 435 /* initialise the EAL for all */ 436 ret = rte_eal_init(argc, argv); 437 if (ret < 0) 438 rte_exit(EXIT_FAILURE, "Cannot init EAL\n"); 439 argc -= ret; 440 argv += ret; 441 442 /* determine the NIC devices available */ 443 if (rte_eth_dev_count_avail() == 0) 444 rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n"); 445 446 /* parse application arguments (those after the EAL ones) */ 447 smp_parse_args(argc, argv); 448 449 proc_type = rte_eal_process_type(); 450 mp = (proc_type == RTE_PROC_SECONDARY) ? 451 rte_mempool_lookup(_SMP_MBUF_POOL) : 452 rte_pktmbuf_pool_create(_SMP_MBUF_POOL, NB_MBUFS, 453 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, 454 rte_socket_id()); 455 if (mp == NULL) 456 rte_exit(EXIT_FAILURE, "Cannot get memory pool for buffers\n"); 457 458 if (num_ports & 1) 459 rte_exit(EXIT_FAILURE, "Application must use an even number of ports\n"); 460 for(i = 0; i < num_ports; i++){ 461 if(proc_type == RTE_PROC_PRIMARY) 462 if (smp_port_init(ports[i], mp, (uint16_t)num_procs) < 0) 463 rte_exit(EXIT_FAILURE, "Error initialising ports\n"); 464 } 465 466 if (proc_type == RTE_PROC_PRIMARY) 467 check_all_ports_link_status((uint8_t)num_ports, (~0x0)); 468 469 assign_ports_to_cores(); 470 471 RTE_LOG(INFO, APP, "Finished Process Init.\n"); 472 473 rte_eal_mp_remote_launch(lcore_main, NULL, CALL_MAIN); 474 475 return 0; 476 } 477