summaryrefslogtreecommitdiff
path: root/examples/l2fwd-jobstats/main.c
blob: af542338293a22c949ecd4d52eb3421c0c0463d2 (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
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2016 Intel Corporation
 */

#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <ctype.h>
#include <getopt.h>

#include <rte_common.h>
#include <rte_log.h>
#include <rte_malloc.h>
#include <rte_memory.h>
#include <rte_memcpy.h>
#include <rte_eal.h>
#include <rte_launch.h>
#include <rte_atomic.h>
#include <rte_cycles.h>
#include <rte_prefetch.h>
#include <rte_lcore.h>
#include <rte_per_lcore.h>
#include <rte_branch_prediction.h>
#include <rte_interrupts.h>
#include <rte_debug.h>
#include <rte_ether.h>
#include <rte_ethdev.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>
#include <rte_spinlock.h>

#include <rte_errno.h>
#include <rte_jobstats.h>
#include <rte_timer.h>
#include <rte_alarm.h>
#include <rte_pause.h>

#define RTE_LOGTYPE_L2FWD RTE_LOGTYPE_USER1

#define NB_MBUF   8192

#define MAX_PKT_BURST 32
#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */

/*
 * Configurable number of RX/TX ring descriptors
 */
#define RTE_TEST_RX_DESC_DEFAULT 1024
#define RTE_TEST_TX_DESC_DEFAULT 1024
static uint16_t nb_rxd = RTE_TEST_RX_DESC_DEFAULT;
static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT;

/* ethernet addresses of ports */
static struct ether_addr l2fwd_ports_eth_addr[RTE_MAX_ETHPORTS];

/* mask of enabled ports */
static uint32_t l2fwd_enabled_port_mask;

/* list of enabled ports */
static uint32_t l2fwd_dst_ports[RTE_MAX_ETHPORTS];

#define UPDATE_STEP_UP 1
#define UPDATE_STEP_DOWN 32

static unsigned int l2fwd_rx_queue_per_lcore = 1;

#define MAX_RX_QUEUE_PER_LCORE 16
#define MAX_TX_QUEUE_PER_PORT 16
struct lcore_queue_conf {
	unsigned n_rx_port;
	unsigned rx_port_list[MAX_RX_QUEUE_PER_LCORE];
	uint64_t next_flush_time[RTE_MAX_ETHPORTS];

	struct rte_timer rx_timers[MAX_RX_QUEUE_PER_LCORE];
	struct rte_jobstats port_fwd_jobs[MAX_RX_QUEUE_PER_LCORE];

	struct rte_timer flush_timer;
	struct rte_jobstats flush_job;
	struct rte_jobstats idle_job;
	struct rte_jobstats_context jobs_context;

	rte_atomic16_t stats_read_pending;
	rte_spinlock_t lock;
} __rte_cache_aligned;
struct lcore_queue_conf lcore_queue_conf[RTE_MAX_LCORE];

struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];

static struct rte_eth_conf port_conf = {
	.rxmode = {
		.split_hdr_size = 0,
		.offloads = DEV_RX_OFFLOAD_CRC_STRIP,
	},
	.txmode = {
		.mq_mode = ETH_MQ_TX_NONE,
	},
};

struct rte_mempool *l2fwd_pktmbuf_pool = NULL;

/* Per-port statistics struct */
struct l2fwd_port_statistics {
	uint64_t tx;
	uint64_t rx;
	uint64_t dropped;
} __rte_cache_aligned;
struct l2fwd_port_statistics port_statistics[RTE_MAX_ETHPORTS];

/* 1 day max */
#define MAX_TIMER_PERIOD 86400
/* default period is 10 seconds */
static int64_t timer_period = 10;
/* default timer frequency */
static double hz;
/* BURST_TX_DRAIN_US converted to cycles */
uint64_t drain_tsc;
/* Convert cycles to ns */
static inline double
cycles_to_ns(uint64_t cycles)
{
	double t = cycles;

	t *= (double)NS_PER_S;
	t /= hz;
	return t;
}

static void
show_lcore_stats(unsigned lcore_id)
{
	struct lcore_queue_conf *qconf = &lcore_queue_conf[lcore_id];
	struct rte_jobstats_context *ctx = &qconf->jobs_context;
	struct rte_jobstats *job;
	uint8_t i;

	/* LCore statistics. */
	uint64_t stats_period, loop_count;
	uint64_t exec, exec_min, exec_max;
	uint64_t management, management_min, management_max;
	uint64_t busy, busy_min, busy_max;

	/* Jobs statistics. */
	const uint16_t port_cnt = qconf->n_rx_port;
	uint64_t jobs_exec_cnt[port_cnt], jobs_period[port_cnt];
	uint64_t jobs_exec[port_cnt], jobs_exec_min[port_cnt],
				jobs_exec_max[port_cnt];

	uint64_t flush_exec_cnt, flush_period;
	uint64_t flush_exec, flush_exec_min, flush_exec_max;

	uint64_t idle_exec_cnt;
	uint64_t idle_exec, idle_exec_min, idle_exec_max;
	uint64_t collection_time = rte_get_timer_cycles();

	/* Ask forwarding thread to give us stats. */
	rte_atomic16_set(&qconf->stats_read_pending, 1);
	rte_spinlock_lock(&qconf->lock);
	rte_atomic16_set(&qconf->stats_read_pending, 0);

	/* Collect context statistics. */
	stats_period = ctx->state_time - ctx->start_time;
	loop_count = ctx->loop_cnt;

	exec = ctx->exec_time;
	exec_min = ctx->min_exec_time;
	exec_max = ctx->max_exec_time;

	management = ctx->management_time;
	management_min = ctx->min_management_time;
	management_max = ctx->max_management_time;

	rte_jobstats_context_reset(ctx);

	for (i = 0; i < port_cnt; i++) {
		job = &qconf->port_fwd_jobs[i];

		jobs_exec_cnt[i] = job->exec_cnt;
		jobs_period[i] = job->period;

		jobs_exec[i] = job->exec_time;
		jobs_exec_min[i] = job->min_exec_time;
		jobs_exec_max[i] = job->max_exec_time;

		rte_jobstats_reset(job);
	}

	flush_exec_cnt = qconf->flush_job.exec_cnt;
	flush_period = qconf->flush_job.period;
	flush_exec = qconf->flush_job.exec_time;
	flush_exec_min = qconf->flush_job.min_exec_time;
	flush_exec_max = qconf->flush_job.max_exec_time;
	rte_jobstats_reset(&qconf->flush_job);

	idle_exec_cnt = qconf->idle_job.exec_cnt;
	idle_exec = qconf->idle_job.exec_time;
	idle_exec_min = qconf->idle_job.min_exec_time;
	idle_exec_max = qconf->idle_job.max_exec_time;
	rte_jobstats_reset(&qconf->idle_job);

	rte_spinlock_unlock(&qconf->lock);

	exec -= idle_exec;
	busy = exec + management;
	busy_min = exec_min + management_min;
	busy_max = exec_max + management_max;


	collection_time = rte_get_timer_cycles() - collection_time;

#define STAT_FMT "\n%-18s %'14.0f %6.1f%% %'10.0f %'10.0f %'10.0f"

	printf("\n----------------"
			"\nLCore %3u: statistics (time in ns, collected in %'9.0f)"
			"\n%-18s %14s %7s %10s %10s %10s "
			"\n%-18s %'14.0f"
			"\n%-18s %'14" PRIu64
			STAT_FMT /* Exec */
			STAT_FMT /* Management */
			STAT_FMT /* Busy */
			STAT_FMT, /* Idle  */
			lcore_id, cycles_to_ns(collection_time),
			"Stat type", "total", "%total", "avg", "min", "max",
			"Stats duration:", cycles_to_ns(stats_period),
			"Loop count:", loop_count,
			"Exec time",
			cycles_to_ns(exec), exec * 100.0 / stats_period,
			cycles_to_ns(loop_count  ? exec / loop_count : 0),
			cycles_to_ns(exec_min),
			cycles_to_ns(exec_max),
			"Management time",
			cycles_to_ns(management), management * 100.0 / stats_period,
			cycles_to_ns(loop_count  ? management / loop_count : 0),
			cycles_to_ns(management_min),
			cycles_to_ns(management_max),
			"Exec + management",
			cycles_to_ns(busy),  busy * 100.0 / stats_period,
			cycles_to_ns(loop_count ? busy / loop_count : 0),
			cycles_to_ns(busy_min),
			cycles_to_ns(busy_max),
			"Idle (job)",
			cycles_to_ns(idle_exec), idle_exec * 100.0 / stats_period,
			cycles_to_ns(idle_exec_cnt ? idle_exec / idle_exec_cnt : 0),
			cycles_to_ns(idle_exec_min),
			cycles_to_ns(idle_exec_max));

	for (i = 0; i < qconf->n_rx_port; i++) {
		job = &qconf->port_fwd_jobs[i];
		printf("\n\nJob %" PRIu32 ": %-20s "
				"\n%-18s %'14" PRIu64
				"\n%-18s %'14.0f"
				STAT_FMT,
				i, job->name,
				"Exec count:", jobs_exec_cnt[i],
				"Exec period: ", cycles_to_ns(jobs_period[i]),
				"Exec time",
				cycles_to_ns(jobs_exec[i]), jobs_exec[i] * 100.0 / stats_period,
				cycles_to_ns(jobs_exec_cnt[i] ? jobs_exec[i] / jobs_exec_cnt[i]
						: 0),
				cycles_to_ns(jobs_exec_min[i]),
				cycles_to_ns(jobs_exec_max[i]));
	}

	if (qconf->n_rx_port > 0) {
		job = &qconf->flush_job;
		printf("\n\nJob %" PRIu32 ": %-20s "
				"\n%-18s %'14" PRIu64
				"\n%-18s %'14.0f"
				STAT_FMT,
				i, job->name,
				"Exec count:", flush_exec_cnt,
				"Exec period: ", cycles_to_ns(flush_period),
				"Exec time",
				cycles_to_ns(flush_exec), flush_exec * 100.0 / stats_period,
				cycles_to_ns(flush_exec_cnt ? flush_exec / flush_exec_cnt : 0),
				cycles_to_ns(flush_exec_min),
				cycles_to_ns(flush_exec_max));
	}
}

/* Print out statistics on packets dropped */
static void
show_stats_cb(__rte_unused void *param)
{
	uint64_t total_packets_dropped, total_packets_tx, total_packets_rx;
	unsigned portid, lcore_id;

	total_packets_dropped = 0;
	total_packets_tx = 0;
	total_packets_rx = 0;

	const char clr[] = { 27, '[', '2', 'J', '\0' };
	const char topLeft[] = { 27, '[', '1', ';', '1', 'H', '\0' };

	/* Clear screen and move to top left */
	printf("%s%s"
			"\nPort statistics ===================================",
			clr, topLeft);

	for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
		/* skip disabled ports */
		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
			continue;
		printf("\nStatistics for port %u ------------------------------"
				"\nPackets sent: %24"PRIu64
				"\nPackets received: %20"PRIu64
				"\nPackets dropped: %21"PRIu64,
				portid,
				port_statistics[portid].tx,
				port_statistics[portid].rx,
				port_statistics[portid].dropped);

		total_packets_dropped += port_statistics[portid].dropped;
		total_packets_tx += port_statistics[portid].tx;
		total_packets_rx += port_statistics[portid].rx;
	}

	printf("\nAggregate statistics ==============================="
			"\nTotal packets sent: %18"PRIu64
			"\nTotal packets received: %14"PRIu64
			"\nTotal packets dropped: %15"PRIu64
			"\n====================================================",
			total_packets_tx,
			total_packets_rx,
			total_packets_dropped);

	RTE_LCORE_FOREACH(lcore_id) {
		if (lcore_queue_conf[lcore_id].n_rx_port > 0)
			show_lcore_stats(lcore_id);
	}

	printf("\n====================================================\n");
	rte_eal_alarm_set(timer_period * US_PER_S, show_stats_cb, NULL);
}

static void
l2fwd_simple_forward(struct rte_mbuf *m, unsigned portid)
{
	struct ether_hdr *eth;
	void *tmp;
	int sent;
	unsigned dst_port;
	struct rte_eth_dev_tx_buffer *buffer;

	dst_port = l2fwd_dst_ports[portid];
	eth = rte_pktmbuf_mtod(m, struct ether_hdr *);

	/* 02:00:00:00:00:xx */
	tmp = &eth->d_addr.addr_bytes[0];
	*((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dst_port << 40);

	/* src addr */
	ether_addr_copy(&l2fwd_ports_eth_addr[dst_port], &eth->s_addr);

	buffer = tx_buffer[dst_port];
	sent = rte_eth_tx_buffer(dst_port, 0, buffer, m);
	if (sent)
		port_statistics[dst_port].tx += sent;
}

static void
l2fwd_job_update_cb(struct rte_jobstats *job, int64_t result)
{
	int64_t err = job->target - result;
	int64_t histeresis = job->target / 8;

	if (err < -histeresis) {
		if (job->min_period + UPDATE_STEP_DOWN < job->period)
			job->period -= UPDATE_STEP_DOWN;
	} else if (err > histeresis) {
		if (job->period + UPDATE_STEP_UP < job->max_period)
			job->period += UPDATE_STEP_UP;
	}
}

static void
l2fwd_fwd_job(__rte_unused struct rte_timer *timer, void *arg)
{
	struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
	struct rte_mbuf *m;

	const uint16_t port_idx = (uintptr_t) arg;
	const unsigned lcore_id = rte_lcore_id();
	struct lcore_queue_conf *qconf = &lcore_queue_conf[lcore_id];
	struct rte_jobstats *job = &qconf->port_fwd_jobs[port_idx];
	const uint16_t portid = qconf->rx_port_list[port_idx];

	uint8_t j;
	uint16_t total_nb_rx;

	rte_jobstats_start(&qconf->jobs_context, job);

	/* Call rx burst 2 times. This allow rte_jobstats logic to see if this
	 * function must be called more frequently. */

	total_nb_rx = rte_eth_rx_burst(portid, 0, pkts_burst,
			MAX_PKT_BURST);

	for (j = 0; j < total_nb_rx; j++) {
		m = pkts_burst[j];
		rte_prefetch0(rte_pktmbuf_mtod(m, void *));
		l2fwd_simple_forward(m, portid);
	}

	if (total_nb_rx == MAX_PKT_BURST) {
		const uint16_t nb_rx = rte_eth_rx_burst(portid, 0, pkts_burst,
				MAX_PKT_BURST);

		total_nb_rx += nb_rx;
		for (j = 0; j < nb_rx; j++) {
			m = pkts_burst[j];
			rte_prefetch0(rte_pktmbuf_mtod(m, void *));
			l2fwd_simple_forward(m, portid);
		}
	}

	port_statistics[portid].rx += total_nb_rx;

	/* Adjust period time in which we are running here. */
	if (rte_jobstats_finish(job, total_nb_rx) != 0) {
		rte_timer_reset(&qconf->rx_timers[port_idx], job->period, PERIODICAL,
				lcore_id, l2fwd_fwd_job, arg);
	}
}

static void
l2fwd_flush_job(__rte_unused struct rte_timer *timer, __rte_unused void *arg)
{
	uint64_t now;
	unsigned lcore_id;
	struct lcore_queue_conf *qconf;
	uint16_t portid;
	unsigned i;
	uint32_t sent;
	struct rte_eth_dev_tx_buffer *buffer;

	lcore_id = rte_lcore_id();
	qconf = &lcore_queue_conf[lcore_id];

	rte_jobstats_start(&qconf->jobs_context, &qconf->flush_job);

	now = rte_get_timer_cycles();
	lcore_id = rte_lcore_id();
	qconf = &lcore_queue_conf[lcore_id];

	for (i = 0; i < qconf->n_rx_port; i++) {
		portid = l2fwd_dst_ports[qconf->rx_port_list[i]];

		if (qconf->next_flush_time[portid] <= now)
			continue;

		buffer = tx_buffer[portid];
		sent = rte_eth_tx_buffer_flush(portid, 0, buffer);
		if (sent)
			port_statistics[portid].tx += sent;

		qconf->next_flush_time[portid] = rte_get_timer_cycles() + drain_tsc;
	}

	/* Pass target to indicate that this job is happy of time interwal
	 * in which it was called. */
	rte_jobstats_finish(&qconf->flush_job, qconf->flush_job.target);
}

/* main processing loop */
static void
l2fwd_main_loop(void)
{
	unsigned lcore_id;
	unsigned i, portid;
	struct lcore_queue_conf *qconf;
	uint8_t stats_read_pending = 0;
	uint8_t need_manage;

	lcore_id = rte_lcore_id();
	qconf = &lcore_queue_conf[lcore_id];

	if (qconf->n_rx_port == 0) {
		RTE_LOG(INFO, L2FWD, "lcore %u has nothing to do\n", lcore_id);
		return;
	}

	RTE_LOG(INFO, L2FWD, "entering main loop on lcore %u\n", lcore_id);

	for (i = 0; i < qconf->n_rx_port; i++) {

		portid = qconf->rx_port_list[i];
		RTE_LOG(INFO, L2FWD, " -- lcoreid=%u portid=%u\n", lcore_id,
			portid);
	}

	rte_jobstats_init(&qconf->idle_job, "idle", 0, 0, 0, 0);

	for (;;) {
		rte_spinlock_lock(&qconf->lock);

		do {
			rte_jobstats_context_start(&qconf->jobs_context);

			/* Do the Idle job:
			 * - Read stats_read_pending flag
			 * - check if some real job need to be executed
			 */
			rte_jobstats_start(&qconf->jobs_context, &qconf->idle_job);

			uint64_t repeats = 0;

			do {
				uint8_t i;
				uint64_t now = rte_get_timer_cycles();

				repeats++;
				need_manage = qconf->flush_timer.expire < now;
				/* Check if we was esked to give a stats. */
				stats_read_pending =
						rte_atomic16_read(&qconf->stats_read_pending);
				need_manage |= stats_read_pending;

				for (i = 0; i < qconf->n_rx_port && !need_manage; i++)
					need_manage = qconf->rx_timers[i].expire < now;

			} while (!need_manage);

			if (likely(repeats != 1))
				rte_jobstats_finish(&qconf->idle_job, qconf->idle_job.target);
			else
				rte_jobstats_abort(&qconf->idle_job);

			rte_timer_manage();
			rte_jobstats_context_finish(&qconf->jobs_context);
		} while (likely(stats_read_pending == 0));

		rte_spinlock_unlock(&qconf->lock);
		rte_pause();
	}
}

static int
l2fwd_launch_one_lcore(__attribute__((unused)) void *dummy)
{
	l2fwd_main_loop();
	return 0;
}

/* display usage */
static void
l2fwd_usage(const char *prgname)
{
	printf("%s [EAL options] -- -p PORTMASK [-q NQ]\n"
	       "  -p PORTMASK: hexadecimal bitmask of ports to configure\n"
	       "  -q NQ: number of queue (=ports) per lcore (default is 1)\n"
		   "  -T PERIOD: statistics will be refreshed each PERIOD seconds (0 to disable, 10 default, 86400 maximum)\n"
		   "  -l set system default locale instead of default (\"C\" locale) for thousands separator in stats.",
	       prgname);
}

static int
l2fwd_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;
}

static unsigned int
l2fwd_parse_nqueue(const char *q_arg)
{
	char *end = NULL;
	unsigned long n;

	/* parse hexadecimal string */
	n = strtoul(q_arg, &end, 10);
	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
		return 0;
	if (n == 0)
		return 0;
	if (n >= MAX_RX_QUEUE_PER_LCORE)
		return 0;

	return n;
}

static int
l2fwd_parse_timer_period(const char *q_arg)
{
	char *end = NULL;
	int n;

	/* parse number string */
	n = strtol(q_arg, &end, 10);
	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
		return -1;
	if (n >= MAX_TIMER_PERIOD)
		return -1;

	return n;
}

/* Parse the argument given in the command line of the application */
static int
l2fwd_parse_args(int argc, char **argv)
{
	int opt, ret;
	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:q:T:l",
				  lgopts, &option_index)) != EOF) {

		switch (opt) {
		/* portmask */
		case 'p':
			l2fwd_enabled_port_mask = l2fwd_parse_portmask(optarg);
			if (l2fwd_enabled_port_mask == 0) {
				printf("invalid portmask\n");
				l2fwd_usage(prgname);
				return -1;
			}
			break;

		/* nqueue */
		case 'q':
			l2fwd_rx_queue_per_lcore = l2fwd_parse_nqueue(optarg);
			if (l2fwd_rx_queue_per_lcore == 0) {
				printf("invalid queue number\n");
				l2fwd_usage(prgname);
				return -1;
			}
			break;

		/* timer period */
		case 'T':
			timer_period = l2fwd_parse_timer_period(optarg);
			if (timer_period < 0) {
				printf("invalid timer period\n");
				l2fwd_usage(prgname);
				return -1;
			}
			break;

		/* For thousands separator in printf. */
		case 'l':
			setlocale(LC_ALL, "");
			break;

		/* long options */
		case 0:
			l2fwd_usage(prgname);
			return -1;

		default:
			l2fwd_usage(prgname);
			return -1;
		}
	}

	if (optind >= 0)
		argv[optind-1] = prgname;

	ret = optind-1;
	optind = 1; /* reset getopt lib */
	return ret;
}

/* Check the link status of all ports in up to 9s, and print them finally */
static void
check_all_ports_link_status(uint32_t port_mask)
{
#define CHECK_INTERVAL 100 /* 100ms */
#define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
	uint16_t portid;
	uint8_t count, all_ports_up, print_flag = 0;
	struct rte_eth_link link;

	printf("\nChecking link status");
	fflush(stdout);
	for (count = 0; count <= MAX_CHECK_TIME; count++) {
		all_ports_up = 1;
		RTE_ETH_FOREACH_DEV(portid) {
			if ((port_mask & (1 << portid)) == 0)
				continue;
			memset(&link, 0, sizeof(link));
			rte_eth_link_get_nowait(portid, &link);
			/* print link status if flag set */
			if (print_flag == 1) {
				if (link.link_status)
					printf(
					"Port%d Link Up. Speed %u Mbps - %s\n",
						portid, link.link_speed,
				(link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
					("full-duplex") : ("half-duplex\n"));
				else
					printf("Port %d Link Down\n", portid);
				continue;
			}
			/* clear all_ports_up flag if any link down */
			if (link.link_status == ETH_LINK_DOWN) {
				all_ports_up = 0;
				break;
			}
		}
		/* after finally printing all link status, get out */
		if (print_flag == 1)
			break;

		if (all_ports_up == 0) {
			printf(".");
			fflush(stdout);
			rte_delay_ms(CHECK_INTERVAL);
		}

		/* set the print_flag if all ports up or timeout */
		if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
			print_flag = 1;
			printf("done\n");
		}
	}
}

int
main(int argc, char **argv)
{
	struct lcore_queue_conf *qconf;
	unsigned lcore_id, rx_lcore_id;
	unsigned nb_ports_in_mask = 0;
	int ret;
	char name[RTE_JOBSTATS_NAMESIZE];
	uint16_t nb_ports;
	uint16_t nb_ports_available = 0;
	uint16_t portid, last_port;
	uint8_t i;

	/* init EAL */
	ret = rte_eal_init(argc, argv);
	if (ret < 0)
		rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
	argc -= ret;
	argv += ret;

	/* parse application arguments (after the EAL ones) */
	ret = l2fwd_parse_args(argc, argv);
	if (ret < 0)
		rte_exit(EXIT_FAILURE, "Invalid L2FWD arguments\n");

	rte_timer_subsystem_init();

	/* fetch default timer frequency. */
	hz = rte_get_timer_hz();

	/* create the mbuf pool */
	l2fwd_pktmbuf_pool =
		rte_pktmbuf_pool_create("mbuf_pool", NB_MBUF, 32,
			0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
	if (l2fwd_pktmbuf_pool == NULL)
		rte_exit(EXIT_FAILURE, "Cannot init mbuf pool\n");

	nb_ports = rte_eth_dev_count_avail();
	if (nb_ports == 0)
		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");

	/* reset l2fwd_dst_ports */
	for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++)
		l2fwd_dst_ports[portid] = 0;
	last_port = 0;

	/*
	 * Each logical core is assigned a dedicated TX queue on each port.
	 */
	RTE_ETH_FOREACH_DEV(portid) {
		/* skip ports that are not enabled */
		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
			continue;

		if (nb_ports_in_mask % 2) {
			l2fwd_dst_ports[portid] = last_port;
			l2fwd_dst_ports[last_port] = portid;
		} else
			last_port = portid;

		nb_ports_in_mask++;
	}
	if (nb_ports_in_mask % 2) {
		printf("Notice: odd number of ports in portmask.\n");
		l2fwd_dst_ports[last_port] = last_port;
	}

	rx_lcore_id = 0;
	qconf = NULL;

	/* Initialize the port/queue configuration of each logical core */
	RTE_ETH_FOREACH_DEV(portid) {
		/* skip ports that are not enabled */
		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
			continue;

		/* get the lcore_id for this port */
		while (rte_lcore_is_enabled(rx_lcore_id) == 0 ||
		       lcore_queue_conf[rx_lcore_id].n_rx_port ==
		       l2fwd_rx_queue_per_lcore) {
			rx_lcore_id++;
			if (rx_lcore_id >= RTE_MAX_LCORE)
				rte_exit(EXIT_FAILURE, "Not enough cores\n");
		}

		if (qconf != &lcore_queue_conf[rx_lcore_id])
			/* Assigned a new logical core in the loop above. */
			qconf = &lcore_queue_conf[rx_lcore_id];

		qconf->rx_port_list[qconf->n_rx_port] = portid;
		qconf->n_rx_port++;
		printf("Lcore %u: RX port %u\n", rx_lcore_id, portid);
	}

	/* Initialise each port */
	RTE_ETH_FOREACH_DEV(portid) {
		struct rte_eth_dev_info dev_info;
		struct rte_eth_rxconf rxq_conf;
		struct rte_eth_txconf txq_conf;
		struct rte_eth_conf local_port_conf = port_conf;

		/* skip ports that are not enabled */
		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0) {
			printf("Skipping disabled port %u\n", portid);
			continue;
		}
		nb_ports_available++;

		/* init port */
		printf("Initializing port %u... ", portid);
		fflush(stdout);
		rte_eth_dev_info_get(portid, &dev_info);
		if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
			local_port_conf.txmode.offloads |=
				DEV_TX_OFFLOAD_MBUF_FAST_FREE;
		ret = rte_eth_dev_configure(portid, 1, 1, &local_port_conf);
		if (ret < 0)
			rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%u\n",
				  ret, portid);

		ret = rte_eth_dev_adjust_nb_rx_tx_desc(portid, &nb_rxd,
						       &nb_txd);
		if (ret < 0)
			rte_exit(EXIT_FAILURE,
				 "Cannot adjust number of descriptors: err=%d, port=%u\n",
				 ret, portid);

		rte_eth_macaddr_get(portid, &l2fwd_ports_eth_addr[portid]);

		/* init one RX queue */
		fflush(stdout);
		rxq_conf = dev_info.default_rxconf;
		rxq_conf.offloads = local_port_conf.rxmode.offloads;
		ret = rte_eth_rx_queue_setup(portid, 0, nb_rxd,
					     rte_eth_dev_socket_id(portid),
					     &rxq_conf,
					     l2fwd_pktmbuf_pool);
		if (ret < 0)
			rte_exit(EXIT_FAILURE, "rte_eth_rx_queue_setup:err=%d, port=%u\n",
				  ret, portid);

		/* init one TX queue on each port */
		txq_conf = dev_info.default_txconf;
		txq_conf.offloads = local_port_conf.txmode.offloads;
		fflush(stdout);
		ret = rte_eth_tx_queue_setup(portid, 0, nb_txd,
				rte_eth_dev_socket_id(portid),
				&txq_conf);
		if (ret < 0)
			rte_exit(EXIT_FAILURE,
			"rte_eth_tx_queue_setup:err=%d, port=%u\n",
				ret, portid);

		/* Initialize TX buffers */
		tx_buffer[portid] = rte_zmalloc_socket("tx_buffer",
				RTE_ETH_TX_BUFFER_SIZE(MAX_PKT_BURST), 0,
				rte_eth_dev_socket_id(portid));
		if (tx_buffer[portid] == NULL)
			rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n",
					portid);

		rte_eth_tx_buffer_init(tx_buffer[portid], MAX_PKT_BURST);

		ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[portid],
				rte_eth_tx_buffer_count_callback,
				&port_statistics[portid].dropped);
		if (ret < 0)
			rte_exit(EXIT_FAILURE,
			"Cannot set error callback for tx buffer on port %u\n",
				 portid);

		/* Start device */
		ret = rte_eth_dev_start(portid);
		if (ret < 0)
			rte_exit(EXIT_FAILURE, "rte_eth_dev_start:err=%d, port=%u\n",
				  ret, portid);

		printf("done:\n");

		rte_eth_promiscuous_enable(portid);

		printf("Port %u, MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n\n",
				portid,
				l2fwd_ports_eth_addr[portid].addr_bytes[0],
				l2fwd_ports_eth_addr[portid].addr_bytes[1],
				l2fwd_ports_eth_addr[portid].addr_bytes[2],
				l2fwd_ports_eth_addr[portid].addr_bytes[3],
				l2fwd_ports_eth_addr[portid].addr_bytes[4],
				l2fwd_ports_eth_addr[portid].addr_bytes[5]);

		/* initialize port stats */
		memset(&port_statistics, 0, sizeof(port_statistics));
	}

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

	check_all_ports_link_status(l2fwd_enabled_port_mask);

	drain_tsc = (hz + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;

	RTE_LCORE_FOREACH(lcore_id) {
		qconf = &lcore_queue_conf[lcore_id];

		rte_spinlock_init(&qconf->lock);

		if (rte_jobstats_context_init(&qconf->jobs_context) != 0)
			rte_panic("Jobs stats context for core %u init failed\n", lcore_id);

		if (qconf->n_rx_port == 0) {
			RTE_LOG(INFO, L2FWD,
				"lcore %u: no ports so no jobs stats context initialization\n",
				lcore_id);
			continue;
		}
		/* Add flush job.
		 * Set fixed period by setting min = max = initial period. Set target to
		 * zero as it is irrelevant for this job. */
		rte_jobstats_init(&qconf->flush_job, "flush", drain_tsc, drain_tsc,
				drain_tsc, 0);

		rte_timer_init(&qconf->flush_timer);
		ret = rte_timer_reset(&qconf->flush_timer, drain_tsc, PERIODICAL,
				lcore_id, &l2fwd_flush_job, NULL);

		if (ret < 0) {
			rte_exit(1, "Failed to reset flush job timer for lcore %u: %s",
					lcore_id, rte_strerror(-ret));
		}

		for (i = 0; i < qconf->n_rx_port; i++) {
			struct rte_jobstats *job = &qconf->port_fwd_jobs[i];

			portid = qconf->rx_port_list[i];
			printf("Setting forward job for port %u\n", portid);

			snprintf(name, RTE_DIM(name), "port %u fwd", portid);
			/* Setup forward job.
			 * Set min, max and initial period. Set target to MAX_PKT_BURST as
			 * this is desired optimal RX/TX burst size. */
			rte_jobstats_init(job, name, 0, drain_tsc, 0, MAX_PKT_BURST);
			rte_jobstats_set_update_period_function(job, l2fwd_job_update_cb);

			rte_timer_init(&qconf->rx_timers[i]);
			ret = rte_timer_reset(&qconf->rx_timers[i], 0, PERIODICAL, lcore_id,
					&l2fwd_fwd_job, (void *)(uintptr_t)i);

			if (ret < 0) {
				rte_exit(1, "Failed to reset lcore %u port %u job timer: %s",
						lcore_id, qconf->rx_port_list[i], rte_strerror(-ret));
			}
		}
	}

	if (timer_period)
		rte_eal_alarm_set(timer_period * MS_PER_S, show_stats_cb, NULL);
	else
		RTE_LOG(INFO, L2FWD, "Stats display disabled\n");

	/* launch per-lcore init on every lcore */
	rte_eal_mp_remote_launch(l2fwd_launch_one_lcore, NULL, CALL_MASTER);
	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
		if (rte_eal_wait_lcore(lcore_id) < 0)
			return -1;
	}

	return 0;
}