[dpdk-dev] [PATCH v4 01/10] examples/l2fwd-event: add default poll mode routines

[<pbhagavatula@marvell.com>]

From: Sunil Kumar Kori <skori@marvell.com>

Add the default l2fwd poll mode routines similar to examples/l2fwd.

Signed-off-by: Sunil Kumar Kori <skori@marvell.com>
---
 examples/Makefile                   |   1 +
 examples/l2fwd-event/Makefile       |  57 +++
 examples/l2fwd-event/l2fwd_common.h |  26 +
 examples/l2fwd-event/main.c         | 737 ++++++++++++++++++++++++++++
 examples/l2fwd-event/meson.build    |  12 +
 5 files changed, 833 insertions(+)
 create mode 100644 examples/l2fwd-event/Makefile
 create mode 100644 examples/l2fwd-event/l2fwd_common.h
 create mode 100644 examples/l2fwd-event/main.c
 create mode 100644 examples/l2fwd-event/meson.build

diff --git a/examples/Makefile b/examples/Makefile
index de11dd487..d18504bd2 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -34,6 +34,7 @@ endif
 DIRS-$(CONFIG_RTE_LIBRTE_HASH) += ipv4_multicast
 DIRS-$(CONFIG_RTE_LIBRTE_KNI) += kni
 DIRS-y += l2fwd
+DIRS-y += l2fwd-event
 ifneq ($(PQOS_INSTALL_PATH),)
 DIRS-y += l2fwd-cat
 endif
diff --git a/examples/l2fwd-event/Makefile b/examples/l2fwd-event/Makefile
new file mode 100644
index 000000000..a156c4162
--- /dev/null
+++ b/examples/l2fwd-event/Makefile
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(C) 2019 Marvell International Ltd.
+#
+
+# binary name
+APP = l2fwd-event
+
+# all source are stored in SRCS-y
+SRCS-y := main.c
+
+# Build using pkg-config variables if possible
+ifeq ($(shell pkg-config --exists libdpdk && echo 0),0)
+
+all: shared
+.PHONY: shared static
+shared: build/$(APP)-shared
+	ln -sf $(APP)-shared build/$(APP)
+static: build/$(APP)-static
+	ln -sf $(APP)-static build/$(APP)
+
+PKGCONF=pkg-config --define-prefix
+
+PC_FILE := $(shell $(PKGCONF) --path libdpdk)
+CFLAGS += -O3 $(shell $(PKGCONF) --cflags libdpdk)
+LDFLAGS_SHARED = $(shell $(PKGCONF) --libs libdpdk)
+LDFLAGS_STATIC = -Wl,-Bstatic $(shell $(PKGCONF) --static --libs libdpdk)
+
+build/$(APP)-shared: $(SRCS-y) Makefile $(PC_FILE) | build
+	$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_SHARED)
+
+build/$(APP)-static: $(SRCS-y) Makefile $(PC_FILE) | build
+	$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_STATIC)
+
+build:
+	@mkdir -p $@
+
+.PHONY: clean
+clean:
+	rm -f build/$(APP) build/$(APP)-static build/$(APP)-shared
+	test -d build && rmdir -p build || true
+
+else # Build using legacy build system
+
+ifeq ($(RTE_SDK),)
+$(error "Please define RTE_SDK environment variable")
+endif
+
+# Default target, detect a build directory, by looking for a path with a .config
+RTE_TARGET ?= $(notdir $(abspath $(dir $(firstword $(wildcard $(RTE_SDK)/*/.config)))))
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS)
+
+include $(RTE_SDK)/mk/rte.extapp.mk
+endif
diff --git a/examples/l2fwd-event/l2fwd_common.h b/examples/l2fwd-event/l2fwd_common.h
new file mode 100644
index 000000000..b1d42183e
--- /dev/null
+++ b/examples/l2fwd-event/l2fwd_common.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(C) 2019 Marvell International Ltd.
+ */
+
+#ifndef __L2FWD_COMMON_H__
+#define __L2FWD_COMMON_H__
+
+#define MAX_PKT_BURST 32
+#define MAX_RX_QUEUE_PER_LCORE 16
+#define MAX_TX_QUEUE_PER_PORT 16
+
+#define RTE_LOGTYPE_L2FWD RTE_LOGTYPE_USER1
+
+#define RTE_TEST_RX_DESC_DEFAULT 1024
+#define RTE_TEST_TX_DESC_DEFAULT 1024
+
+/* Per-port statistics struct */
+struct l2fwd_port_statistics {
+	uint64_t dropped;
+	uint64_t tx;
+	uint64_t rx;
+} __rte_cache_aligned;
+
+void print_stats(void);
+
+#endif /* __L2FWD_COMMON_H__ */
diff --git a/examples/l2fwd-event/main.c b/examples/l2fwd-event/main.c
new file mode 100644
index 000000000..cc47fa203
--- /dev/null
+++ b/examples/l2fwd-event/main.c
@@ -0,0 +1,737 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(C) 2019 Marvell International Ltd.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <sys/queue.h>
+#include <netinet/in.h>
+#include <setjmp.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <errno.h>
+#include <getopt.h>
+#include <signal.h>
+#include <stdbool.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_random.h>
+#include <rte_debug.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_eventdev.h>
+#include <rte_mempool.h>
+#include <rte_mbuf.h>
+#include <rte_spinlock.h>
+
+#include "l2fwd_common.h"
+
+static volatile bool force_quit;
+
+/* MAC updating enabled by default */
+static int mac_updating = 1;
+
+#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
+#define MEMPOOL_CACHE_SIZE 256
+
+/*
+ * Configurable number of RX/TX ring descriptors
+ */
+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 rte_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];
+
+static unsigned int l2fwd_rx_queue_per_lcore = 1;
+
+struct lcore_queue_conf {
+	uint32_t rx_port_list[MAX_RX_QUEUE_PER_LCORE];
+	uint32_t n_rx_port;
+} __rte_cache_aligned;
+
+static struct lcore_queue_conf lcore_queue_conf[RTE_MAX_LCORE];
+
+static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
+
+static struct rte_eth_conf port_conf = {
+	.rxmode = {
+		.split_hdr_size = 0,
+	},
+	.txmode = {
+		.mq_mode = ETH_MQ_TX_NONE,
+	},
+};
+
+static struct rte_mempool *l2fwd_pktmbuf_pool;
+
+static struct l2fwd_port_statistics port_statistics[RTE_MAX_ETHPORTS];
+
+#define MAX_TIMER_PERIOD 86400 /* 1 day max */
+/* A tsc-based timer responsible for triggering statistics printout */
+static uint64_t timer_period = 10; /* default period is 10 seconds */
+
+/* Print out statistics on packets dropped */
+void print_stats(void)
+{
+	uint64_t total_packets_dropped, total_packets_tx, total_packets_rx;
+	uint32_t portid;
+
+	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", clr, topLeft);
+
+	printf("\nPort statistics ====================================");
+
+	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,
+		   total_packets_tx,
+		   total_packets_rx,
+		   total_packets_dropped);
+	printf("\n====================================================\n");
+}
+
+static void
+l2fwd_mac_updating(struct rte_mbuf *m, uint32_t dest_portid)
+{
+	struct rte_ether_hdr *eth;
+	void *tmp;
+
+	eth = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
+
+	/* 02:00:00:00:00:xx */
+	tmp = &eth->d_addr.addr_bytes[0];
+	*((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dest_portid << 40);
+
+	/* src addr */
+	rte_ether_addr_copy(&l2fwd_ports_eth_addr[dest_portid], &eth->s_addr);
+}
+
+static void
+l2fwd_simple_forward(struct rte_mbuf *m, uint32_t portid)
+{
+	uint32_t dst_port;
+	int32_t sent;
+	struct rte_eth_dev_tx_buffer *buffer;
+
+	dst_port = l2fwd_dst_ports[portid];
+
+	if (mac_updating)
+		l2fwd_mac_updating(m, dst_port);
+
+	buffer = tx_buffer[dst_port];
+	sent = rte_eth_tx_buffer(dst_port, 0, buffer, m);
+	if (sent)
+		port_statistics[dst_port].tx += sent;
+}
+
+/* main processing loop */
+static void l2fwd_main_loop(void)
+{
+	uint64_t prev_tsc, diff_tsc, cur_tsc, timer_tsc, drain_tsc;
+	struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+	struct rte_eth_dev_tx_buffer *buffer;
+	struct lcore_queue_conf *qconf;
+	uint32_t i, j, portid, nb_rx;
+	struct rte_mbuf *m;
+	uint32_t lcore_id;
+	int32_t sent;
+
+	drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S *
+			BURST_TX_DRAIN_US;
+	prev_tsc = 0;
+	timer_tsc = 0;
+
+	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);
+
+	}
+
+	while (!force_quit) {
+
+		cur_tsc = rte_rdtsc();
+
+		/*
+		 * TX burst queue drain
+		 */
+		diff_tsc = cur_tsc - prev_tsc;
+		if (unlikely(diff_tsc > drain_tsc)) {
+			for (i = 0; i < qconf->n_rx_port; i++) {
+				portid =
+					l2fwd_dst_ports[qconf->rx_port_list[i]];
+				buffer = tx_buffer[portid];
+				sent = rte_eth_tx_buffer_flush(portid, 0,
+							       buffer);
+				if (sent)
+					port_statistics[portid].tx += sent;
+			}
+
+			/* if timer is enabled */
+			if (timer_period > 0) {
+				/* advance the timer */
+				timer_tsc += diff_tsc;
+
+				/* if timer has reached its timeout */
+				if (unlikely(timer_tsc >= timer_period)) {
+					/* do this only on master core */
+					if (lcore_id ==
+						rte_get_master_lcore()) {
+						print_stats();
+						/* reset the timer */
+						timer_tsc = 0;
+					}
+				}
+			}
+
+			prev_tsc = cur_tsc;
+		}
+
+		/*
+		 * Read packet from RX queues
+		 */
+		for (i = 0; i < qconf->n_rx_port; i++) {
+
+			portid = qconf->rx_port_list[i];
+			nb_rx = rte_eth_rx_burst(portid, 0,
+						 pkts_burst, MAX_PKT_BURST);
+
+			port_statistics[portid].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);
+			}
+		}
+	}
+}
+
+static int
+l2fwd_launch_one_lcore(void *args)
+{
+	RTE_SET_USED(args);
+	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"
+	       "  --[no-]mac-updating: Enable or disable MAC addresses updating (enabled by default)\n"
+	       "      When enabled:\n"
+	       "       - The source MAC address is replaced by the TX port MAC address\n"
+	       "       - The destination MAC address is replaced by 02:00:00:00:00:TX_PORT_ID\n",
+	       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;
+}
+
+static const char short_options[] =
+	"p:"  /* portmask */
+	"q:"  /* number of queues */
+	"T:"  /* timer period */
+	;
+
+#define CMD_LINE_OPT_MAC_UPDATING "mac-updating"
+#define CMD_LINE_OPT_NO_MAC_UPDATING "no-mac-updating"
+
+enum {
+	/* long options mapped to a short option */
+
+	/* first long only option value must be >= 256, so that we won't
+	 * conflict with short options
+	 */
+	CMD_LINE_OPT_MIN_NUM = 256,
+};
+
+static const struct option lgopts[] = {
+	{ CMD_LINE_OPT_MAC_UPDATING, no_argument, &mac_updating, 1},
+	{ CMD_LINE_OPT_NO_MAC_UPDATING, no_argument, &mac_updating, 0},
+	{NULL, 0, 0, 0}
+};
+
+/* Parse the argument given in the command line of the application */
+static int
+l2fwd_parse_args(int argc, char **argv)
+{
+	int opt, ret, timer_secs;
+	char *prgname = argv[0];
+	char **argvopt;
+	int option_index;
+
+	argvopt = argv;
+
+	while ((opt = getopt_long(argc, argvopt, short_options,
+				  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_secs = l2fwd_parse_timer_period(optarg);
+			if (timer_secs < 0) {
+				printf("invalid timer period\n");
+				l2fwd_usage(prgname);
+				return -1;
+			}
+			timer_period = timer_secs;
+			break;
+
+		/* long options */
+		case 0:
+			break;
+
+		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++) {
+		if (force_quit)
+			return;
+		all_ports_up = 1;
+		RTE_ETH_FOREACH_DEV(portid) {
+			if (force_quit)
+				return;
+			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");
+		}
+	}
+}
+
+static void
+signal_handler(int signum)
+{
+	if (signum == SIGINT || signum == SIGTERM) {
+		printf("\n\nSignal %d received, preparing to exit...\n",
+				signum);
+		force_quit = true;
+	}
+}
+
+int
+main(int argc, char **argv)
+{
+	uint16_t nb_ports_available = 0;
+	struct lcore_queue_conf *qconf;
+	uint32_t nb_ports_in_mask = 0;
+	uint16_t portid, last_port;
+	uint32_t nb_lcores = 0;
+	uint32_t rx_lcore_id;
+	uint32_t nb_mbufs;
+	uint16_t nb_ports;
+	int ret;
+
+	/* init EAL */
+	ret = rte_eal_init(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
+	argc -= ret;
+	argv += ret;
+
+	force_quit = false;
+	signal(SIGINT, signal_handler);
+	signal(SIGTERM, signal_handler);
+
+	/* parse application arguments (after the EAL ones) */
+	ret = l2fwd_parse_args(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid L2FWD arguments\n");
+
+	printf("MAC updating %s\n", mac_updating ? "enabled" : "disabled");
+
+	/* convert to number of cycles */
+	timer_period *= rte_get_timer_hz();
+
+	nb_ports = rte_eth_dev_count_avail();
+	if (nb_ports == 0)
+		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
+
+	/* check port mask to possible port mask */
+	if (l2fwd_enabled_port_mask & ~((1 << nb_ports) - 1))
+		rte_exit(EXIT_FAILURE, "Invalid portmask; possible (0x%x)\n",
+			(1 << nb_ports) - 1);
+
+	/* 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;
+
+	nb_mbufs = RTE_MAX(nb_ports * (nb_rxd + nb_txd + MAX_PKT_BURST +
+		nb_lcores * MEMPOOL_CACHE_SIZE), 8192U);
+
+	/* create the mbuf pool */
+	l2fwd_pktmbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", nb_mbufs,
+		MEMPOOL_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE,
+		rte_socket_id());
+	if (l2fwd_pktmbuf_pool == NULL)
+		rte_exit(EXIT_FAILURE, "Cannot init mbuf pool\n");
+
+	/* 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];
+			nb_lcores++;
+		}
+
+		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_rxconf rxq_conf;
+		struct rte_eth_txconf txq_conf;
+		struct rte_eth_conf local_port_conf = port_conf;
+		struct rte_eth_dev_info dev_info;
+
+		/* 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 */
+		fflush(stdout);
+		txq_conf = dev_info.default_txconf;
+		txq_conf.offloads = local_port_conf.txmode.offloads;
+		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);
+
+	ret = 0;
+	/* launch per-lcore init on every lcore */
+	rte_eal_mp_remote_launch(l2fwd_launch_one_lcore, NULL,
+				 CALL_MASTER);
+	rte_eal_mp_wait_lcore();
+
+	RTE_ETH_FOREACH_DEV(portid) {
+		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
+			continue;
+		printf("Closing port %d...", portid);
+		rte_eth_dev_stop(portid);
+		rte_eth_dev_close(portid);
+		printf(" Done\n");
+	}
+	printf("Bye...\n");
+
+	return ret;
+}
diff --git a/examples/l2fwd-event/meson.build b/examples/l2fwd-event/meson.build
new file mode 100644
index 000000000..16eadb0b4
--- /dev/null
+++ b/examples/l2fwd-event/meson.build
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(C) 2019 Marvell International Ltd.
+#
+
+# meson file, for building this example as part of a main DPDK build.
+#
+# To build this example as a standalone application with an already-installed
+# DPDK instance, use 'make'
+
+sources = files(
+	'main.c'
+)
-- 
2.17.1