Imported upstream release 16.04

* gbp import-orig ../dpdk-16.04.tar.xz

Change-Id: Iac2196db782ba322f6974d8a752acc34ce5024c3
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 668 insertions, 0 deletions

diff --git a/examples/load_balancer/runtime.c b/examples/load_balancer/runtime.c
new file mode 100644
index 00000000..6944325d
--- /dev/null
+++ b/examples/load_balancer/runtime.c
@@ -0,0 +1,668 @@
+/*-
+ *   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 <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <string.h>
+#include <sys/queue.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <getopt.h>
+
+#include <rte_common.h>
+#include <rte_byteorder.h>
+#include <rte_log.h>
+#include <rte_memory.h>
+#include <rte_memcpy.h>
+#include <rte_memzone.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.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_pci.h>
+#include <rte_random.h>
+#include <rte_debug.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_ring.h>
+#include <rte_mempool.h>
+#include <rte_mbuf.h>
+#include <rte_ip.h>
+#include <rte_tcp.h>
+#include <rte_lpm.h>
+
+#include "main.h"
+
+#ifndef APP_LCORE_IO_FLUSH
+#define APP_LCORE_IO_FLUSH           1000000
+#endif
+
+#ifndef APP_LCORE_WORKER_FLUSH
+#define APP_LCORE_WORKER_FLUSH       1000000
+#endif
+
+#ifndef APP_STATS
+#define APP_STATS                    1000000
+#endif
+
+#define APP_IO_RX_DROP_ALL_PACKETS   0
+#define APP_WORKER_DROP_ALL_PACKETS  0
+#define APP_IO_TX_DROP_ALL_PACKETS   0
+
+#ifndef APP_IO_RX_PREFETCH_ENABLE
+#define APP_IO_RX_PREFETCH_ENABLE    1
+#endif
+
+#ifndef APP_WORKER_PREFETCH_ENABLE
+#define APP_WORKER_PREFETCH_ENABLE   1
+#endif
+
+#ifndef APP_IO_TX_PREFETCH_ENABLE
+#define APP_IO_TX_PREFETCH_ENABLE    1
+#endif
+
+#if APP_IO_RX_PREFETCH_ENABLE
+#define APP_IO_RX_PREFETCH0(p)       rte_prefetch0(p)
+#define APP_IO_RX_PREFETCH1(p)       rte_prefetch1(p)
+#else
+#define APP_IO_RX_PREFETCH0(p)
+#define APP_IO_RX_PREFETCH1(p)
+#endif
+
+#if APP_WORKER_PREFETCH_ENABLE
+#define APP_WORKER_PREFETCH0(p)      rte_prefetch0(p)
+#define APP_WORKER_PREFETCH1(p)      rte_prefetch1(p)
+#else
+#define APP_WORKER_PREFETCH0(p)
+#define APP_WORKER_PREFETCH1(p)
+#endif
+
+#if APP_IO_TX_PREFETCH_ENABLE
+#define APP_IO_TX_PREFETCH0(p)       rte_prefetch0(p)
+#define APP_IO_TX_PREFETCH1(p)       rte_prefetch1(p)
+#else
+#define APP_IO_TX_PREFETCH0(p)
+#define APP_IO_TX_PREFETCH1(p)
+#endif
+
+static inline void
+app_lcore_io_rx_buffer_to_send (
+	struct app_lcore_params_io *lp,
+	uint32_t worker,
+	struct rte_mbuf *mbuf,
+	uint32_t bsz)
+{
+	uint32_t pos;
+	int ret;
+
+	pos = lp->rx.mbuf_out[worker].n_mbufs;
+	lp->rx.mbuf_out[worker].array[pos ++] = mbuf;
+	if (likely(pos < bsz)) {
+		lp->rx.mbuf_out[worker].n_mbufs = pos;
+		return;
+	}
+
+	ret = rte_ring_sp_enqueue_bulk(
+		lp->rx.rings[worker],
+		(void **) lp->rx.mbuf_out[worker].array,
+		bsz);
+
+	if (unlikely(ret == -ENOBUFS)) {
+		uint32_t k;
+		for (k = 0; k < bsz; k ++) {
+			struct rte_mbuf *m = lp->rx.mbuf_out[worker].array[k];
+			rte_pktmbuf_free(m);
+		}
+	}
+
+	lp->rx.mbuf_out[worker].n_mbufs = 0;
+	lp->rx.mbuf_out_flush[worker] = 0;
+
+#if APP_STATS
+	lp->rx.rings_iters[worker] ++;
+	if (likely(ret == 0)) {
+		lp->rx.rings_count[worker] ++;
+	}
+	if (unlikely(lp->rx.rings_iters[worker] == APP_STATS)) {
+		unsigned lcore = rte_lcore_id();
+
+		printf("\tI/O RX %u out (worker %u): enq success rate = %.2f\n",
+			lcore,
+			(unsigned)worker,
+			((double) lp->rx.rings_count[worker]) / ((double) lp->rx.rings_iters[worker]));
+		lp->rx.rings_iters[worker] = 0;
+		lp->rx.rings_count[worker] = 0;
+	}
+#endif
+}
+
+static inline void
+app_lcore_io_rx(
+	struct app_lcore_params_io *lp,
+	uint32_t n_workers,
+	uint32_t bsz_rd,
+	uint32_t bsz_wr,
+	uint8_t pos_lb)
+{
+	struct rte_mbuf *mbuf_1_0, *mbuf_1_1, *mbuf_2_0, *mbuf_2_1;
+	uint8_t *data_1_0, *data_1_1 = NULL;
+	uint32_t i;
+
+	for (i = 0; i < lp->rx.n_nic_queues; i ++) {
+		uint8_t port = lp->rx.nic_queues[i].port;
+		uint8_t queue = lp->rx.nic_queues[i].queue;
+		uint32_t n_mbufs, j;
+
+		n_mbufs = rte_eth_rx_burst(
+			port,
+			queue,
+			lp->rx.mbuf_in.array,
+			(uint16_t) bsz_rd);
+
+		if (unlikely(n_mbufs == 0)) {
+			continue;
+		}
+
+#if APP_STATS
+		lp->rx.nic_queues_iters[i] ++;
+		lp->rx.nic_queues_count[i] += n_mbufs;
+		if (unlikely(lp->rx.nic_queues_iters[i] == APP_STATS)) {
+			struct rte_eth_stats stats;
+			unsigned lcore = rte_lcore_id();
+
+			rte_eth_stats_get(port, &stats);
+
+			printf("I/O RX %u in (NIC port %u): NIC drop ratio = %.2f avg burst size = %.2f\n",
+				lcore,
+				(unsigned) port,
+				(double) stats.imissed / (double) (stats.imissed + stats.ipackets),
+				((double) lp->rx.nic_queues_count[i]) / ((double) lp->rx.nic_queues_iters[i]));
+			lp->rx.nic_queues_iters[i] = 0;
+			lp->rx.nic_queues_count[i] = 0;
+		}
+#endif
+
+#if APP_IO_RX_DROP_ALL_PACKETS
+		for (j = 0; j < n_mbufs; j ++) {
+			struct rte_mbuf *pkt = lp->rx.mbuf_in.array[j];
+			rte_pktmbuf_free(pkt);
+		}
+
+		continue;
+#endif
+
+		mbuf_1_0 = lp->rx.mbuf_in.array[0];
+		mbuf_1_1 = lp->rx.mbuf_in.array[1];
+		data_1_0 = rte_pktmbuf_mtod(mbuf_1_0, uint8_t *);
+		if (likely(n_mbufs > 1)) {
+			data_1_1 = rte_pktmbuf_mtod(mbuf_1_1, uint8_t *);
+		}
+
+		mbuf_2_0 = lp->rx.mbuf_in.array[2];
+		mbuf_2_1 = lp->rx.mbuf_in.array[3];
+		APP_IO_RX_PREFETCH0(mbuf_2_0);
+		APP_IO_RX_PREFETCH0(mbuf_2_1);
+
+		for (j = 0; j + 3 < n_mbufs; j += 2) {
+			struct rte_mbuf *mbuf_0_0, *mbuf_0_1;
+			uint8_t *data_0_0, *data_0_1;
+			uint32_t worker_0, worker_1;
+
+			mbuf_0_0 = mbuf_1_0;
+			mbuf_0_1 = mbuf_1_1;
+			data_0_0 = data_1_0;
+			data_0_1 = data_1_1;
+
+			mbuf_1_0 = mbuf_2_0;
+			mbuf_1_1 = mbuf_2_1;
+			data_1_0 = rte_pktmbuf_mtod(mbuf_2_0, uint8_t *);
+			data_1_1 = rte_pktmbuf_mtod(mbuf_2_1, uint8_t *);
+			APP_IO_RX_PREFETCH0(data_1_0);
+			APP_IO_RX_PREFETCH0(data_1_1);
+
+			mbuf_2_0 = lp->rx.mbuf_in.array[j+4];
+			mbuf_2_1 = lp->rx.mbuf_in.array[j+5];
+			APP_IO_RX_PREFETCH0(mbuf_2_0);
+			APP_IO_RX_PREFETCH0(mbuf_2_1);
+
+			worker_0 = data_0_0[pos_lb] & (n_workers - 1);
+			worker_1 = data_0_1[pos_lb] & (n_workers - 1);
+
+			app_lcore_io_rx_buffer_to_send(lp, worker_0, mbuf_0_0, bsz_wr);
+			app_lcore_io_rx_buffer_to_send(lp, worker_1, mbuf_0_1, bsz_wr);
+		}
+
+		/* Handle the last 1, 2 (when n_mbufs is even) or 3 (when n_mbufs is odd) packets  */
+		for ( ; j < n_mbufs; j += 1) {
+			struct rte_mbuf *mbuf;
+			uint8_t *data;
+			uint32_t worker;
+
+			mbuf = mbuf_1_0;
+			mbuf_1_0 = mbuf_1_1;
+			mbuf_1_1 = mbuf_2_0;
+			mbuf_2_0 = mbuf_2_1;
+
+			data = rte_pktmbuf_mtod(mbuf, uint8_t *);
+
+			APP_IO_RX_PREFETCH0(mbuf_1_0);
+
+			worker = data[pos_lb] & (n_workers - 1);
+
+			app_lcore_io_rx_buffer_to_send(lp, worker, mbuf, bsz_wr);
+		}
+	}
+}
+
+static inline void
+app_lcore_io_rx_flush(struct app_lcore_params_io *lp, uint32_t n_workers)
+{
+	uint32_t worker;
+
+	for (worker = 0; worker < n_workers; worker ++) {
+		int ret;
+
+		if (likely((lp->rx.mbuf_out_flush[worker] == 0) ||
+		           (lp->rx.mbuf_out[worker].n_mbufs == 0))) {
+			lp->rx.mbuf_out_flush[worker] = 1;
+			continue;
+		}
+
+		ret = rte_ring_sp_enqueue_bulk(
+			lp->rx.rings[worker],
+			(void **) lp->rx.mbuf_out[worker].array,
+			lp->rx.mbuf_out[worker].n_mbufs);
+
+		if (unlikely(ret < 0)) {
+			uint32_t k;
+			for (k = 0; k < lp->rx.mbuf_out[worker].n_mbufs; k ++) {
+				struct rte_mbuf *pkt_to_free = lp->rx.mbuf_out[worker].array[k];
+				rte_pktmbuf_free(pkt_to_free);
+			}
+		}
+
+		lp->rx.mbuf_out[worker].n_mbufs = 0;
+		lp->rx.mbuf_out_flush[worker] = 1;
+	}
+}
+
+static inline void
+app_lcore_io_tx(
+	struct app_lcore_params_io *lp,
+	uint32_t n_workers,
+	uint32_t bsz_rd,
+	uint32_t bsz_wr)
+{
+	uint32_t worker;
+
+	for (worker = 0; worker < n_workers; worker ++) {
+		uint32_t i;
+
+		for (i = 0; i < lp->tx.n_nic_ports; i ++) {
+			uint8_t port = lp->tx.nic_ports[i];
+			struct rte_ring *ring = lp->tx.rings[port][worker];
+			uint32_t n_mbufs, n_pkts;
+			int ret;
+
+			n_mbufs = lp->tx.mbuf_out[port].n_mbufs;
+			ret = rte_ring_sc_dequeue_bulk(
+				ring,
+				(void **) &lp->tx.mbuf_out[port].array[n_mbufs],
+				bsz_rd);
+
+			if (unlikely(ret == -ENOENT)) {
+				continue;
+			}
+
+			n_mbufs += bsz_rd;
+
+#if APP_IO_TX_DROP_ALL_PACKETS
+			{
+				uint32_t j;
+				APP_IO_TX_PREFETCH0(lp->tx.mbuf_out[port].array[0]);
+				APP_IO_TX_PREFETCH0(lp->tx.mbuf_out[port].array[1]);
+
+				for (j = 0; j < n_mbufs; j ++) {
+					if (likely(j < n_mbufs - 2)) {
+						APP_IO_TX_PREFETCH0(lp->tx.mbuf_out[port].array[j + 2]);
+					}
+
+					rte_pktmbuf_free(lp->tx.mbuf_out[port].array[j]);
+				}
+
+				lp->tx.mbuf_out[port].n_mbufs = 0;
+
+				continue;
+			}
+#endif
+
+			if (unlikely(n_mbufs < bsz_wr)) {
+				lp->tx.mbuf_out[port].n_mbufs = n_mbufs;
+				continue;
+			}
+
+			n_pkts = rte_eth_tx_burst(
+				port,
+				0,
+				lp->tx.mbuf_out[port].array,
+				(uint16_t) n_mbufs);
+
+#if APP_STATS
+			lp->tx.nic_ports_iters[port] ++;
+			lp->tx.nic_ports_count[port] += n_pkts;
+			if (unlikely(lp->tx.nic_ports_iters[port] == APP_STATS)) {
+				unsigned lcore = rte_lcore_id();
+
+				printf("\t\t\tI/O TX %u out (port %u): avg burst size = %.2f\n",
+					lcore,
+					(unsigned) port,
+					((double) lp->tx.nic_ports_count[port]) / ((double) lp->tx.nic_ports_iters[port]));
+				lp->tx.nic_ports_iters[port] = 0;
+				lp->tx.nic_ports_count[port] = 0;
+			}
+#endif
+
+			if (unlikely(n_pkts < n_mbufs)) {
+				uint32_t k;
+				for (k = n_pkts; k < n_mbufs; k ++) {
+					struct rte_mbuf *pkt_to_free = lp->tx.mbuf_out[port].array[k];
+					rte_pktmbuf_free(pkt_to_free);
+				}
+			}
+			lp->tx.mbuf_out[port].n_mbufs = 0;
+			lp->tx.mbuf_out_flush[port] = 0;
+		}
+	}
+}
+
+static inline void
+app_lcore_io_tx_flush(struct app_lcore_params_io *lp)
+{
+	uint8_t port;
+
+	for (port = 0; port < lp->tx.n_nic_ports; port ++) {
+		uint32_t n_pkts;
+
+		if (likely((lp->tx.mbuf_out_flush[port] == 0) ||
+		           (lp->tx.mbuf_out[port].n_mbufs == 0))) {
+			lp->tx.mbuf_out_flush[port] = 1;
+			continue;
+		}
+
+		n_pkts = rte_eth_tx_burst(
+			port,
+			0,
+			lp->tx.mbuf_out[port].array,
+			(uint16_t) lp->tx.mbuf_out[port].n_mbufs);
+
+		if (unlikely(n_pkts < lp->tx.mbuf_out[port].n_mbufs)) {
+			uint32_t k;
+			for (k = n_pkts; k < lp->tx.mbuf_out[port].n_mbufs; k ++) {
+				struct rte_mbuf *pkt_to_free = lp->tx.mbuf_out[port].array[k];
+				rte_pktmbuf_free(pkt_to_free);
+			}
+		}
+
+		lp->tx.mbuf_out[port].n_mbufs = 0;
+		lp->tx.mbuf_out_flush[port] = 1;
+	}
+}
+
+static void
+app_lcore_main_loop_io(void)
+{
+	uint32_t lcore = rte_lcore_id();
+	struct app_lcore_params_io *lp = &app.lcore_params[lcore].io;
+	uint32_t n_workers = app_get_lcores_worker();
+	uint64_t i = 0;
+
+	uint32_t bsz_rx_rd = app.burst_size_io_rx_read;
+	uint32_t bsz_rx_wr = app.burst_size_io_rx_write;
+	uint32_t bsz_tx_rd = app.burst_size_io_tx_read;
+	uint32_t bsz_tx_wr = app.burst_size_io_tx_write;
+
+	uint8_t pos_lb = app.pos_lb;
+
+	for ( ; ; ) {
+		if (APP_LCORE_IO_FLUSH && (unlikely(i == APP_LCORE_IO_FLUSH))) {
+			if (likely(lp->rx.n_nic_queues > 0)) {
+				app_lcore_io_rx_flush(lp, n_workers);
+			}
+
+			if (likely(lp->tx.n_nic_ports > 0)) {
+				app_lcore_io_tx_flush(lp);
+			}
+
+			i = 0;
+		}
+
+		if (likely(lp->rx.n_nic_queues > 0)) {
+			app_lcore_io_rx(lp, n_workers, bsz_rx_rd, bsz_rx_wr, pos_lb);
+		}
+
+		if (likely(lp->tx.n_nic_ports > 0)) {
+			app_lcore_io_tx(lp, n_workers, bsz_tx_rd, bsz_tx_wr);
+		}
+
+		i ++;
+	}
+}
+
+static inline void
+app_lcore_worker(
+	struct app_lcore_params_worker *lp,
+	uint32_t bsz_rd,
+	uint32_t bsz_wr)
+{
+	uint32_t i;
+
+	for (i = 0; i < lp->n_rings_in; i ++) {
+		struct rte_ring *ring_in = lp->rings_in[i];
+		uint32_t j;
+		int ret;
+
+		ret = rte_ring_sc_dequeue_bulk(
+			ring_in,
+			(void **) lp->mbuf_in.array,
+			bsz_rd);
+
+		if (unlikely(ret == -ENOENT)) {
+			continue;
+		}
+
+#if APP_WORKER_DROP_ALL_PACKETS
+		for (j = 0; j < bsz_rd; j ++) {
+			struct rte_mbuf *pkt = lp->mbuf_in.array[j];
+			rte_pktmbuf_free(pkt);
+		}
+
+		continue;
+#endif
+
+		APP_WORKER_PREFETCH1(rte_pktmbuf_mtod(lp->mbuf_in.array[0], unsigned char *));
+		APP_WORKER_PREFETCH0(lp->mbuf_in.array[1]);
+
+		for (j = 0; j < bsz_rd; j ++) {
+			struct rte_mbuf *pkt;
+			struct ipv4_hdr *ipv4_hdr;
+			uint32_t ipv4_dst, pos;
+			uint32_t port;
+
+			if (likely(j < bsz_rd - 1)) {
+				APP_WORKER_PREFETCH1(rte_pktmbuf_mtod(lp->mbuf_in.array[j+1], unsigned char *));
+			}
+			if (likely(j < bsz_rd - 2)) {
+				APP_WORKER_PREFETCH0(lp->mbuf_in.array[j+2]);
+			}
+
+			pkt = lp->mbuf_in.array[j];
+			ipv4_hdr = rte_pktmbuf_mtod_offset(pkt,
+							   struct ipv4_hdr *,
+							   sizeof(struct ether_hdr));
+			ipv4_dst = rte_be_to_cpu_32(ipv4_hdr->dst_addr);
+
+			if (unlikely(rte_lpm_lookup(lp->lpm_table, ipv4_dst, &port) != 0)) {
+				port = pkt->port;
+			}
+
+			pos = lp->mbuf_out[port].n_mbufs;
+
+			lp->mbuf_out[port].array[pos ++] = pkt;
+			if (likely(pos < bsz_wr)) {
+				lp->mbuf_out[port].n_mbufs = pos;
+				continue;
+			}
+
+			ret = rte_ring_sp_enqueue_bulk(
+				lp->rings_out[port],
+				(void **) lp->mbuf_out[port].array,
+				bsz_wr);
+
+#if APP_STATS
+			lp->rings_out_iters[port] ++;
+			if (ret == 0) {
+				lp->rings_out_count[port] += 1;
+			}
+			if (lp->rings_out_iters[port] == APP_STATS){
+				printf("\t\tWorker %u out (NIC port %u): enq success rate = %.2f\n",
+					(unsigned) lp->worker_id,
+					(unsigned) port,
+					((double) lp->rings_out_count[port]) / ((double) lp->rings_out_iters[port]));
+				lp->rings_out_iters[port] = 0;
+				lp->rings_out_count[port] = 0;
+			}
+#endif
+
+			if (unlikely(ret == -ENOBUFS)) {
+				uint32_t k;
+				for (k = 0; k < bsz_wr; k ++) {
+					struct rte_mbuf *pkt_to_free = lp->mbuf_out[port].array[k];
+					rte_pktmbuf_free(pkt_to_free);
+				}
+			}
+
+			lp->mbuf_out[port].n_mbufs = 0;
+			lp->mbuf_out_flush[port] = 0;
+		}
+	}
+}
+
+static inline void
+app_lcore_worker_flush(struct app_lcore_params_worker *lp)
+{
+	uint32_t port;
+
+	for (port = 0; port < APP_MAX_NIC_PORTS; port ++) {
+		int ret;
+
+		if (unlikely(lp->rings_out[port] == NULL)) {
+			continue;
+		}
+
+		if (likely((lp->mbuf_out_flush[port] == 0) ||
+		           (lp->mbuf_out[port].n_mbufs == 0))) {
+			lp->mbuf_out_flush[port] = 1;
+			continue;
+		}
+
+		ret = rte_ring_sp_enqueue_bulk(
+			lp->rings_out[port],
+			(void **) lp->mbuf_out[port].array,
+			lp->mbuf_out[port].n_mbufs);
+
+		if (unlikely(ret < 0)) {
+			uint32_t k;
+			for (k = 0; k < lp->mbuf_out[port].n_mbufs; k ++) {
+				struct rte_mbuf *pkt_to_free = lp->mbuf_out[port].array[k];
+				rte_pktmbuf_free(pkt_to_free);
+			}
+		}
+
+		lp->mbuf_out[port].n_mbufs = 0;
+		lp->mbuf_out_flush[port] = 1;
+	}
+}
+
+static void
+app_lcore_main_loop_worker(void) {
+	uint32_t lcore = rte_lcore_id();
+	struct app_lcore_params_worker *lp = &app.lcore_params[lcore].worker;
+	uint64_t i = 0;
+
+	uint32_t bsz_rd = app.burst_size_worker_read;
+	uint32_t bsz_wr = app.burst_size_worker_write;
+
+	for ( ; ; ) {
+		if (APP_LCORE_WORKER_FLUSH && (unlikely(i == APP_LCORE_WORKER_FLUSH))) {
+			app_lcore_worker_flush(lp);
+			i = 0;
+		}
+
+		app_lcore_worker(lp, bsz_rd, bsz_wr);
+
+		i ++;
+	}
+}
+
+int
+app_lcore_main_loop(__attribute__((unused)) void *arg)
+{
+	struct app_lcore_params *lp;
+	unsigned lcore;
+
+	lcore = rte_lcore_id();
+	lp = &app.lcore_params[lcore];
+
+	if (lp->type == e_APP_LCORE_IO) {
+		printf("Logical core %u (I/O) main loop.\n", lcore);
+		app_lcore_main_loop_io();
+	}
+
+	if (lp->type == e_APP_LCORE_WORKER) {
+		printf("Logical core %u (worker %u) main loop.\n",
+			lcore,
+			(unsigned) lp->worker.worker_id);
+		app_lcore_main_loop_worker();
+	}
+
+	return 0;
+}