aboutsummaryrefslogtreecommitdiffstats
path: root/examples/distributor/main.c
blob: 24857f2d8f8ffaf89a1b337c1a03a50ccbcce513 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdint.h>
#include <inttypes.h>
#include <unistd.h>
#include <signal.h>
#include <getopt.h>

#include <rte_eal.h>
#include <rte_ethdev.h>
#include <rte_cycles.h>
#include <rte_malloc.h>
#include <rte_debug.h>
#include <rte_prefetch.h>
#include <rte_distributor.h>

#define RX_RING_SIZE 256
#define TX_RING_SIZE 512
#define NUM_MBUFS ((64*1024)-1)
#define MBUF_CACHE_SIZE 250
#define BURST_SIZE 32
#define RTE_RING_SZ 1024

#define RTE_LOGTYPE_DISTRAPP RTE_LOGTYPE_USER1

/* mask of enabled ports */
static uint32_t enabled_port_mask;
volatile uint8_t quit_signal;
volatile uint8_t quit_signal_rx;

static volatile struct app_stats {
	struct {
		uint64_t rx_pkts;
		uint64_t returned_pkts;
		uint64_t enqueued_pkts;
	} rx __rte_cache_aligned;

	struct {
		uint64_t dequeue_pkts;
		uint64_t tx_pkts;
	} tx __rte_cache_aligned;
} app_stats;

static const struct rte_eth_conf port_conf_default = {
	.rxmode = {
		.mq_mode = ETH_MQ_RX_RSS,
		.max_rx_pkt_len = ETHER_MAX_LEN,
	},
	.txmode = {
		.mq_mode = ETH_MQ_TX_NONE,
	},
	.rx_adv_conf = {
		.rss_conf = {
			.rss_hf = ETH_RSS_IP | ETH_RSS_UDP |
				ETH_RSS_TCP | ETH_RSS_SCTP,
		}
	},
};

struct output_buffer {
	unsigned count;
	struct rte_mbuf *mbufs[BURST_SIZE];
};

/*
 * Initialises a given port using global settings and with the rx buffers
 * coming from the mbuf_pool passed as parameter
 */
static inline int
port_init(uint8_t port, struct rte_mempool *mbuf_pool)
{
	struct rte_eth_conf port_conf = port_conf_default;
	const uint16_t rxRings = 1, txRings = rte_lcore_count() - 1;
	int retval;
	uint16_t q;

	if (port >= rte_eth_dev_count())
		return -1;

	retval = rte_eth_dev_configure(port, rxRings, txRings, &port_conf);
	if (retval != 0)
		return retval;

	for (q = 0; q < rxRings; q++) {
		retval = rte_eth_rx_queue_setup(port, q, RX_RING_SIZE,
						rte_eth_dev_socket_id(port),
						NULL, mbuf_pool);
		if (retval < 0)
			return retval;
	}

	for (q = 0; q < txRings; q++) {
		retval = rte_eth_tx_queue_setup(port, q, TX_RING_SIZE,
						rte_eth_dev_socket_id(port),
						NULL);
		if (retval < 0)
			return retval;
	}

	retval = rte_eth_dev_start(port);
	if (retval < 0)
		return retval;

	struct rte_eth_link link;
	rte_eth_link_get_nowait(port, &link);
	if (!link.link_status) {
		sleep(1);
		rte_eth_link_get_nowait(port, &link);
	}

	if (!link.link_status) {
		printf("Link down on port %"PRIu8"\n", port);
		return 0;
	}

	struct ether_addr addr;
	rte_eth_macaddr_get(port, &addr);
	printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
			" %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
			(unsigned)port,
			addr.addr_bytes[0], addr.addr_bytes[1],
			addr.addr_bytes[2], addr.addr_bytes[3],
			addr.addr_bytes[4], addr.addr_bytes[5]);

	rte_eth_promiscuous_enable(port);

	return 0;
}

struct lcore_params {
	unsigned worker_id;
	struct rte_distributor *d;
	struct rte_ring *r;
	struct rte_mempool *mem_pool;
};

static int
quit_workers(struct rte_distributor *d, struct rte_mempool *p)
{
	const unsigned num_workers = rte_lcore_count() - 2;
	unsigned i;
	struct rte_mbuf *bufs[num_workers];

	if (rte_mempool_get_bulk(p, (void *)bufs, num_workers) != 0) {
		printf("line %d: Error getting mbufs from pool\n", __LINE__);
		return -1;
	}

	for (i = 0; i < num_workers; i++)
		bufs[i]->hash.rss = i << 1;

	rte_distributor_process(d, bufs, num_workers);
	rte_mempool_put_bulk(p, (void *)bufs, num_workers);

	return 0;
}

static int
lcore_rx(struct lcore_params *p)
{
	struct rte_distributor *d = p->d;
	struct rte_mempool *mem_pool = p->mem_pool;
	struct rte_ring *r = p->r;
	const uint8_t nb_ports = rte_eth_dev_count();
	const int socket_id = rte_socket_id();
	uint8_t port;

	for (port = 0; port < nb_ports; port++) {
		/* skip ports that are not enabled */
		if ((enabled_port_mask & (1 << port)) == 0)
			continue;

		if (rte_eth_dev_socket_id(port) > 0 &&
				rte_eth_dev_socket_id(port) != socket_id)
			printf("WARNING, port %u is on remote NUMA node to "
					"RX thread.\n\tPerformance will not "
					"be optimal.\n", port);
	}

	printf("\nCore %u doing packet RX.\n", rte_lcore_id());
	port = 0;
	while (!quit_signal_rx) {

		/* skip ports that are not enabled */
		if ((enabled_port_mask & (1 << port)) == 0) {
			if (++port == nb_ports)
				port = 0;
			continue;
		}
		struct rte_mbuf *bufs[BURST_SIZE*2];
		const uint16_t nb_rx = rte_eth_rx_burst(port, 0, bufs,
				BURST_SIZE);
		app_stats.rx.rx_pkts += nb_rx;

		rte_distributor_process(d, bufs, nb_rx);
		const uint16_t nb_ret = rte_distributor_returned_pkts(d,
				bufs, BURST_SIZE*2);
		app_stats.rx.returned_pkts += nb_ret;
		if (unlikely(nb_ret == 0))
			continue;

		uint16_t sent = rte_ring_enqueue_burst(r, (void *)bufs, nb_ret);
		app_stats.rx.enqueued_pkts += sent;
		if (unlikely(sent < nb_ret)) {
			RTE_LOG(DEBUG, DISTRAPP,
				"%s:Packet loss due to full ring\n", __func__);
			while (sent < nb_ret)
				rte_pktmbuf_free(bufs[sent++]);
		}
		if (++port == nb_ports)
			port = 0;
	}
	rte_distributor_process(d, NULL, 0);
	/* flush distributor to bring to known state */
	rte_distributor_flush(d);
	/* set worker & tx threads quit flag */
	quit_signal = 1;
	/*
	 * worker threads may hang in get packet as
	 * distributor process is not running, just make sure workers
	 * get packets till quit_signal is actually been
	 * received and they gracefully shutdown
	 */
	if (quit_workers(d, mem_pool) != 0)
		return -1;
	/* rx thread should quit at last */
	return 0;
}

static inline void
flush_one_port(struct output_buffer *outbuf, uint8_t outp)
{
	unsigned nb_tx = rte_eth_tx_burst(outp, 0, outbuf->mbufs,
			outbuf->count);
	app_stats.tx.tx_pkts += nb_tx;

	if (unlikely(nb_tx < outbuf->count)) {
		RTE_LOG(DEBUG, DISTRAPP,
			"%s:Packet loss with tx_burst\n", __func__);
		do {
			rte_pktmbuf_free(outbuf->mbufs[nb_tx]);
		} while (++nb_tx < outbuf->count);
	}
	outbuf->count = 0;
}

static inline void
flush_all_ports(struct output_buffer *tx_buffers, uint8_t nb_ports)
{
	uint8_t outp;
	for (outp = 0; outp < nb_ports; outp++) {
		/* skip ports that are not enabled */
		if ((enabled_port_mask & (1 << outp)) == 0)
			continue;

		if (tx_buffers[outp].count == 0)
			continue;

		flush_one_port(&tx_buffers[outp], outp);
	}
}

static int
lcore_tx(struct rte_ring *in_r)
{
	static struct output_buffer tx_buffers[RTE_MAX_ETHPORTS];
	const uint8_t nb_ports = rte_eth_dev_count();
	const int socket_id = rte_socket_id();
	uint8_t port;

	for (port = 0; port < nb_ports; port++) {
		/* skip ports that are not enabled */
		if ((enabled_port_mask & (1 << port)) == 0)
			continue;

		if (rte_eth_dev_socket_id(port) > 0 &&
				rte_eth_dev_socket_id(port) != socket_id)
			printf("WARNING, port %u is on remote NUMA node to "
					"TX thread.\n\tPerformance will not "
					"be optimal.\n", port);
	}

	printf("\nCore %u doing packet TX.\n", rte_lcore_id());
	while (!quit_signal) {

		for (port = 0; port < nb_ports; port++) {
			/* skip ports that are not enabled */
			if ((enabled_port_mask & (1 << port)) == 0)
				continue;

			struct rte_mbuf *bufs[BURST_SIZE];
			const uint16_t nb_rx = rte_ring_dequeue_burst(in_r,
					(void *)bufs, BURST_SIZE);
			app_stats.tx.dequeue_pkts += nb_rx;

			/* if we get no traffic, flush anything we have */
			if (unlikely(nb_rx == 0)) {
				flush_all_ports(tx_buffers, nb_ports);
				continue;
			}

			/* for traffic we receive, queue it up for transmit */
			uint16_t i;
			rte_prefetch_non_temporal((void *)bufs[0]);
			rte_prefetch_non_temporal((void *)bufs[1]);
			rte_prefetch_non_temporal((void *)bufs[2]);
			for (i = 0; i < nb_rx; i++) {
				struct output_buffer *outbuf;
				uint8_t outp;
				rte_prefetch_non_temporal((void *)bufs[i + 3]);
				/*
				 * workers should update in_port to hold the
				 * output port value
				 */
				outp = bufs[i]->port;
				/* skip ports that are not enabled */
				if ((enabled_port_mask & (1 << outp)) == 0)
					continue;

				outbuf = &tx_buffers[outp];
				outbuf->mbufs[outbuf->count++] = bufs[i];
				if (outbuf->count == BURST_SIZE)
					flush_one_port(outbuf, outp);
			}
		}
	}
	return 0;
}

static void
int_handler(int sig_num)
{
	printf("Exiting on signal %d\n", sig_num);
	/* set quit flag for rx thread to exit */
	quit_signal_rx = 1;
}

static void
print_stats(void)
{
	struct rte_eth_stats eth_stats;
	unsigned i;

	printf("\nRX thread stats:\n");
	printf(" - Received:    %"PRIu64"\n", app_stats.rx.rx_pkts);
	printf(" - Processed:   %"PRIu64"\n", app_stats.rx.returned_pkts);
	printf(" - Enqueued:    %"PRIu64"\n", app_stats.rx.enqueued_pkts);

	printf("\nTX thread stats:\n");
	printf(" - Dequeued:    %"PRIu64"\n", app_stats.tx.dequeue_pkts);
	printf(" - Transmitted: %"PRIu64"\n", app_stats.tx.tx_pkts);

	for (i = 0; i < rte_eth_dev_count(); i++) {
		rte_eth_stats_get(i, &eth_stats);
		printf("\nPort %u stats:\n", i);
		printf(" - Pkts in:   %"PRIu64"\n", eth_stats.ipackets);
		printf(" - Pkts out:  %"PRIu64"\n", eth_stats.opackets);
		printf(" - In Errs:   %"PRIu64"\n", eth_stats.ierrors);
		printf(" - Out Errs:  %"PRIu64"\n", eth_stats.oerrors);
		printf(" - Mbuf Errs: %"PRIu64"\n", eth_stats.rx_nombuf);
	}
}

static int
lcore_worker(struct lcore_params *p)
{
	struct rte_distributor *d = p->d;
	const unsigned id = p->worker_id;
	/*
	 * for single port, xor_val will be zero so we won't modify the output
	 * port, otherwise we send traffic from 0 to 1, 2 to 3, and vice versa
	 */
	const unsigned xor_val = (rte_eth_dev_count() > 1);
	struct rte_mbuf *buf = NULL;

	printf("\nCore %u acting as worker core.\n", rte_lcore_id());
	while (!quit_signal) {
		buf = rte_distributor_get_pkt(d, id, buf);
		buf->port ^= xor_val;
	}
	return 0;
}

/* display usage */
static void
print_usage(const char *prgname)
{
	printf("%s [EAL options] -- -p PORTMASK\n"
			"  -p PORTMASK: hexadecimal bitmask of ports to configure\n",
			prgname);
}

static int
parse_portmask(const char *portmask)
{
	char *end = NULL;
	unsigned long pm;

	/* parse hexadecimal string */
	pm = strtoul(portmask, &end, 16);
	if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
		return -1;

	if (pm == 0)
		return -1;

	return pm;
}

/* Parse the argument given in the command line of the application */
static int
parse_args(int argc, char **argv)
{
	int opt;
	char **argvopt;
	int option_index;
	char *prgname = argv[0];
	static struct option lgopts[] = {
		{NULL, 0, 0, 0}
	};

	argvopt = argv;

	while ((opt = getopt_long(argc, argvopt, "p:",
			lgopts, &option_index)) != EOF) {

		switch (opt) {
		/* portmask */
		case 'p':
			enabled_port_mask = parse_portmask(optarg);
			if (enabled_port_mask == 0) {
				printf("invalid portmask\n");
				print_usage(prgname);
				return -1;
			}
			break;

		default:
			print_usage(prgname);
			return -1;
		}
	}

	if (optind <= 1) {
		print_usage(prgname);
		return -1;
	}

	argv[optind-1] = prgname;

	optind = 0; /* reset getopt lib */
	return 0;
}

/* Main function, does initialization and calls the per-lcore functions */
int
main(int argc, char *argv[])
{
	struct rte_mempool *mbuf_pool;
	struct rte_distributor *d;
	struct rte_ring *output_ring;
	unsigned lcore_id, worker_id = 0;
	unsigned nb_ports;
	uint8_t portid;
	uint8_t nb_ports_available;

	/* catch ctrl-c so we can print on exit */
	signal(SIGINT, int_handler);

	/* init EAL */
	int ret = rte_eal_init(argc, argv);
	if (ret < 0)
		rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
	argc -= ret;
	argv += ret;

	/* parse application arguments (after the EAL ones) */
	ret = parse_args(argc, argv);
	if (ret < 0)
		rte_exit(EXIT_FAILURE, "Invalid distributor parameters\n");

	if (rte_lcore_count() < 3)
		rte_exit(EXIT_FAILURE, "Error, This application needs at "
				"least 3 logical cores to run:\n"
				"1 lcore for packet RX and distribution\n"
				"1 lcore for packet TX\n"
				"and at least 1 lcore for worker threads\n");

	nb_ports = rte_eth_dev_count();
	if (nb_ports == 0)
		rte_exit(EXIT_FAILURE, "Error: no ethernet ports detected\n");
	if (nb_ports != 1 && (nb_ports & 1))
		rte_exit(EXIT_FAILURE, "Error: number of ports must be even, except "
				"when using a single port\n");

	mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
		NUM_MBUFS * nb_ports, MBUF_CACHE_SIZE, 0,
		RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
	if (mbuf_pool == NULL)
		rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
	nb_ports_available = nb_ports;

	/* initialize all ports */
	for (portid = 0; portid < nb_ports; portid++) {
		/* skip ports that are not enabled */
		if ((enabled_port_mask & (1 << portid)) == 0) {
			printf("\nSkipping disabled port %d\n", portid);
			nb_ports_available--;
			continue;
		}
		/* init port */
		printf("Initializing port %u... done\n", (unsigned) portid);

		if (port_init(portid, mbuf_pool) != 0)
			rte_exit(EXIT_FAILURE, "Cannot initialize port %"PRIu8"\n",
					portid);
	}

	if (!nb_ports_available) {
		rte_exit(EXIT_FAILURE,
				"All available ports are disabled. Please set portmask.\n");
	}

	d = rte_distributor_create("PKT_DIST", rte_socket_id(),
			rte_lcore_count() - 2);
	if (d == NULL)
		rte_exit(EXIT_FAILURE, "Cannot create distributor\n");

	/*
	 * scheduler ring is read only by the transmitter core, but written to
	 * by multiple threads
	 */
	output_ring = rte_ring_create("Output_ring", RTE_RING_SZ,
			rte_socket_id(), RING_F_SC_DEQ);
	if (output_ring == NULL)
		rte_exit(EXIT_FAILURE, "Cannot create output ring\n");

	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
		if (worker_id == rte_lcore_count() - 2)
			rte_eal_remote_launch((lcore_function_t *)lcore_tx,
					output_ring, lcore_id);
		else {
			struct lcore_params *p =
					rte_malloc(NULL, sizeof(*p), 0);
			if (!p)
				rte_panic("malloc failure\n");
			*p = (struct lcore_params){worker_id, d, output_ring, mbuf_pool};

			rte_eal_remote_launch((lcore_function_t *)lcore_worker,
					p, lcore_id);
		}
		worker_id++;
	}
	/* call lcore_main on master core only */
	struct lcore_params p = { 0, d, output_ring, mbuf_pool};

	if (lcore_rx(&p) != 0)
		return -1;

	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
		if (rte_eal_wait_lcore(lcore_id) < 0)
			return -1;
	}

	print_stats();
	return 0;
}