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35 * Sample application demostrating how to do packet I/O in a multi-process
36 * environment. The same code can be run as a primary process and as a
37 * secondary process, just with a different proc-id parameter in each case
38 * (apart from the EAL flag to indicate a secondary process).
40 * Each process will read from the same ports, given by the port-mask
41 * parameter, which should be the same in each case, just using a different
42 * queue per port as determined by the proc-id parameter.
51 #include <sys/queue.h>
56 #include <rte_common.h>
58 #include <rte_memory.h>
59 #include <rte_launch.h>
61 #include <rte_per_lcore.h>
62 #include <rte_lcore.h>
63 #include <rte_atomic.h>
64 #include <rte_branch_prediction.h>
65 #include <rte_debug.h>
66 #include <rte_interrupts.h>
68 #include <rte_ether.h>
69 #include <rte_ethdev.h>
70 #include <rte_mempool.h>
71 #include <rte_memcpy.h>
73 #include <rte_string_fns.h>
74 #include <rte_cycles.h>
76 #define RTE_LOGTYPE_APP RTE_LOGTYPE_USER1
78 #define NB_MBUFS 64*1024 /* use 64k mbufs */
79 #define MBUF_CACHE_SIZE 256
81 #define RX_RING_SIZE 128
82 #define TX_RING_SIZE 512
84 #define PARAM_PROC_ID "proc-id"
85 #define PARAM_NUM_PROCS "num-procs"
87 /* for each lcore, record the elements of the ports array to use */
93 /* structure to record the rx and tx packets. Put two per cache line as ports
99 } __attribute__((aligned(RTE_CACHE_LINE_SIZE / 2)));
101 static int proc_id = -1;
102 static unsigned num_procs = 0;
104 static uint16_t ports[RTE_MAX_ETHPORTS];
105 static unsigned num_ports = 0;
107 static struct lcore_ports lcore_ports[RTE_MAX_LCORE];
108 static struct port_stats pstats[RTE_MAX_ETHPORTS];
110 /* prints the usage statement and quits with an error message */
112 smp_usage(const char *prgname, const char *errmsg)
114 printf("\nError: %s\n",errmsg);
115 printf("\n%s [EAL options] -- -p <port mask> "
116 "--"PARAM_NUM_PROCS" <n>"
117 " --"PARAM_PROC_ID" <id>\n"
118 "-p : a hex bitmask indicating what ports are to be used\n"
119 "--num-procs: the number of processes which will be used\n"
120 "--proc-id : the id of the current process (id < num-procs)\n"
127 /* signal handler configured for SIGTERM and SIGINT to print stats on exit */
129 print_stats(int signum)
132 printf("\nExiting on signal %d\n\n", signum);
133 for (i = 0; i < num_ports; i++){
134 const uint8_t p_num = ports[i];
135 printf("Port %u: RX - %u, TX - %u, Drop - %u\n", (unsigned)p_num,
136 pstats[p_num].rx, pstats[p_num].tx, pstats[p_num].drop);
141 /* Parse the argument given in the command line of the application */
143 smp_parse_args(int argc, char **argv)
148 unsigned i, port_mask = 0;
149 char *prgname = argv[0];
150 static struct option lgopts[] = {
151 {PARAM_NUM_PROCS, 1, 0, 0},
152 {PARAM_PROC_ID, 1, 0, 0},
158 while ((opt = getopt_long(argc, argvopt, "p:", \
159 lgopts, &option_index)) != EOF) {
163 port_mask = strtoull(optarg, NULL, 16);
167 if (strncmp(lgopts[option_index].name, PARAM_NUM_PROCS, 8) == 0)
168 num_procs = atoi(optarg);
169 else if (strncmp(lgopts[option_index].name, PARAM_PROC_ID, 7) == 0)
170 proc_id = atoi(optarg);
174 smp_usage(prgname, "Cannot parse all command-line arguments\n");
179 argv[optind-1] = prgname;
182 smp_usage(prgname, "Invalid or missing proc-id parameter\n");
183 if (rte_eal_process_type() == RTE_PROC_PRIMARY && num_procs == 0)
184 smp_usage(prgname, "Invalid or missing num-procs parameter\n");
186 smp_usage(prgname, "Invalid or missing port mask\n");
188 /* get the port numbers from the port mask */
189 for(i = 0; i < rte_eth_dev_count(); i++)
190 if(port_mask & (1 << i))
191 ports[num_ports++] = (uint8_t)i;
194 optind = 1; /* reset getopt lib */
200 * Initialises a given port using global settings and with the rx buffers
201 * coming from the mbuf_pool passed as parameter
204 smp_port_init(uint16_t port, struct rte_mempool *mbuf_pool,
207 struct rte_eth_conf port_conf = {
209 .mq_mode = ETH_MQ_RX_RSS,
211 .header_split = 0, /**< Header Split disabled */
212 .hw_ip_checksum = 1, /**< IP checksum offload enabled */
213 .hw_vlan_filter = 0, /**< VLAN filtering disabled */
214 .jumbo_frame = 0, /**< Jumbo Frame Support disabled */
215 .hw_strip_crc = 1, /**< CRC stripped by hardware */
220 .rss_hf = ETH_RSS_IP,
224 .mq_mode = ETH_MQ_TX_NONE,
227 const uint16_t rx_rings = num_queues, tx_rings = num_queues;
228 struct rte_eth_dev_info info;
231 uint16_t nb_rxd = RX_RING_SIZE;
232 uint16_t nb_txd = TX_RING_SIZE;
234 if (rte_eal_process_type() == RTE_PROC_SECONDARY)
237 if (port >= rte_eth_dev_count())
240 printf("# Initialising port %u... ", port);
243 rte_eth_dev_info_get(port, &info);
244 info.default_rxconf.rx_drop_en = 1;
246 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
250 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
254 for (q = 0; q < rx_rings; q ++) {
255 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
256 rte_eth_dev_socket_id(port),
257 &info.default_rxconf,
263 for (q = 0; q < tx_rings; q ++) {
264 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
265 rte_eth_dev_socket_id(port),
271 rte_eth_promiscuous_enable(port);
273 retval = rte_eth_dev_start(port);
280 /* Goes through each of the lcores and calculates what ports should
281 * be used by that core. Fills in the global lcore_ports[] array.
284 assign_ports_to_cores(void)
287 const unsigned lcores = rte_eal_get_configuration()->lcore_count;
288 const unsigned port_pairs = num_ports / 2;
289 const unsigned pairs_per_lcore = port_pairs / lcores;
290 unsigned extra_pairs = port_pairs % lcores;
291 unsigned ports_assigned = 0;
294 RTE_LCORE_FOREACH(i) {
295 lcore_ports[i].start_port = ports_assigned;
296 lcore_ports[i].num_ports = pairs_per_lcore * 2;
297 if (extra_pairs > 0) {
298 lcore_ports[i].num_ports += 2;
301 ports_assigned += lcore_ports[i].num_ports;
305 /* Main function used by the processing threads.
306 * Prints out some configuration details for the thread and then begins
307 * performing packet RX and TX.
310 lcore_main(void *arg __rte_unused)
312 const unsigned id = rte_lcore_id();
313 const unsigned start_port = lcore_ports[id].start_port;
314 const unsigned end_port = start_port + lcore_ports[id].num_ports;
315 const uint16_t q_id = (uint16_t)proc_id;
320 if (start_port == end_port){
321 printf("Lcore %u has nothing to do\n", id);
325 /* build up message in msgbuf before printing to decrease likelihood
326 * of multi-core message interleaving.
328 msgbufpos += snprintf(msgbuf, sizeof(msgbuf) - msgbufpos,
329 "Lcore %u using ports ", id);
330 for (p = start_port; p < end_port; p++){
331 msgbufpos += snprintf(msgbuf + msgbufpos, sizeof(msgbuf) - msgbufpos,
332 "%u ", (unsigned)ports[p]);
334 printf("%s\n", msgbuf);
335 printf("lcore %u using queue %u of each port\n", id, (unsigned)q_id);
337 /* handle packet I/O from the ports, reading and writing to the
338 * queue number corresponding to our process number (not lcore id)
342 struct rte_mbuf *buf[PKT_BURST];
344 for (p = start_port; p < end_port; p++) {
345 const uint8_t src = ports[p];
346 const uint8_t dst = ports[p ^ 1]; /* 0 <-> 1, 2 <-> 3 etc */
347 const uint16_t rx_c = rte_eth_rx_burst(src, q_id, buf, PKT_BURST);
350 pstats[src].rx += rx_c;
352 const uint16_t tx_c = rte_eth_tx_burst(dst, q_id, buf, rx_c);
353 pstats[dst].tx += tx_c;
355 pstats[dst].drop += (rx_c - tx_c);
356 for (i = tx_c; i < rx_c; i++)
357 rte_pktmbuf_free(buf[i]);
363 /* Check the link status of all ports in up to 9s, and print them finally */
365 check_all_ports_link_status(uint16_t port_num, uint32_t port_mask)
367 #define CHECK_INTERVAL 100 /* 100ms */
368 #define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
370 uint8_t count, all_ports_up, print_flag = 0;
371 struct rte_eth_link link;
373 printf("\nChecking link status");
375 for (count = 0; count <= MAX_CHECK_TIME; count++) {
377 for (portid = 0; portid < port_num; portid++) {
378 if ((port_mask & (1 << portid)) == 0)
380 memset(&link, 0, sizeof(link));
381 rte_eth_link_get_nowait(portid, &link);
382 /* print link status if flag set */
383 if (print_flag == 1) {
384 if (link.link_status)
386 "Port%d Link Up. Speed %u Mbps - %s\n",
387 portid, link.link_speed,
388 (link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
389 ("full-duplex") : ("half-duplex\n"));
391 printf("Port %d Link Down\n", portid);
394 /* clear all_ports_up flag if any link down */
395 if (link.link_status == ETH_LINK_DOWN) {
400 /* after finally printing all link status, get out */
404 if (all_ports_up == 0) {
407 rte_delay_ms(CHECK_INTERVAL);
410 /* set the print_flag if all ports up or timeout */
411 if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
419 * Performs initialisation and then calls the lcore_main on each core
420 * to do the packet-processing work.
423 main(int argc, char **argv)
425 static const char *_SMP_MBUF_POOL = "SMP_MBUF_POOL";
428 enum rte_proc_type_t proc_type;
429 struct rte_mempool *mp;
431 /* set up signal handlers to print stats on exit */
432 signal(SIGINT, print_stats);
433 signal(SIGTERM, print_stats);
435 /* initialise the EAL for all */
436 ret = rte_eal_init(argc, argv);
438 rte_exit(EXIT_FAILURE, "Cannot init EAL\n");
442 /* determine the NIC devices available */
443 if (rte_eth_dev_count() == 0)
444 rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
446 /* parse application arguments (those after the EAL ones) */
447 smp_parse_args(argc, argv);
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,
456 rte_exit(EXIT_FAILURE, "Cannot get memory pool for buffers\n");
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");
466 if (proc_type == RTE_PROC_PRIMARY)
467 check_all_ports_link_status((uint8_t)num_ports, (~0x0));
469 assign_ports_to_cores();
471 RTE_LOG(INFO, APP, "Finished Process Init.\n");
473 rte_eal_mp_remote_launch(lcore_main, NULL, CALL_MASTER);