update sources to ceph Nautilus 14.2.1

[ceph.git] / ceph / src / seastar / dpdk / examples / distributor / main.c

/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2017 Intel Corporation. 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 512
#define TX_RING_SIZE 512
#define NUM_MBUFS ((64*1024)-1)
#define MBUF_CACHE_SIZE 128
#define BURST_SIZE 64
#define SCHED_RX_RING_SZ 8192
#define SCHED_TX_RING_SZ 65536
#define BURST_SIZE_TX 32

#define RTE_LOGTYPE_DISTRAPP RTE_LOGTYPE_USER1

#define ANSI_COLOR_RED     "\x1b[31m"
#define ANSI_COLOR_RESET   "\x1b[0m"

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

static volatile struct app_stats {
        struct {
                uint64_t rx_pkts;
                uint64_t returned_pkts;
                uint64_t enqueued_pkts;
                uint64_t enqdrop_pkts;
        } rx __rte_cache_aligned;
        int pad1 __rte_cache_aligned;

        struct {
                uint64_t in_pkts;
                uint64_t ret_pkts;
                uint64_t sent_pkts;
                uint64_t enqdrop_pkts;
        } dist __rte_cache_aligned;
        int pad2 __rte_cache_aligned;

        struct {
                uint64_t dequeue_pkts;
                uint64_t tx_pkts;
                uint64_t enqdrop_pkts;
        } tx __rte_cache_aligned;
        int pad3 __rte_cache_aligned;

        uint64_t worker_pkts[64] __rte_cache_aligned;

        int pad4 __rte_cache_aligned;

        uint64_t worker_bursts[64][8] __rte_cache_aligned;

        int pad5 __rte_cache_aligned;

        uint64_t port_rx_pkts[64] __rte_cache_aligned;
        uint64_t port_tx_pkts[64] __rte_cache_aligned;
} app_stats;

struct app_stats prev_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];
};

static void print_stats(void);

/*
 * 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);
        while (!link.link_status) {
                printf("Waiting for Link up on port %"PRIu8"\n", port);
                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 *rx_dist_ring;
        struct rte_ring *dist_tx_ring;
        struct rte_mempool *mem_pool;
};

static int
lcore_rx(struct lcore_params *p)
{
        const uint8_t nb_ports = rte_eth_dev_count();
        const int socket_id = rte_socket_id();
        uint8_t port;
        struct rte_mbuf *bufs[BURST_SIZE*2];

        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;
                }
                const uint16_t nb_rx = rte_eth_rx_burst(port, 0, bufs,
                                BURST_SIZE);
                if (unlikely(nb_rx == 0)) {
                        if (++port == nb_ports)
                                port = 0;
                        continue;
                }
                app_stats.rx.rx_pkts += nb_rx;

/*
 * You can run the distributor on the rx core with this code. Returned
 * packets are then send straight to the tx core.
 */
#if 0
        rte_distributor_process(d, bufs, nb_rx);
        const uint16_t nb_ret = rte_distributor_returned_pktsd,
                        bufs, BURST_SIZE*2);

                app_stats.rx.returned_pkts += nb_ret;
                if (unlikely(nb_ret == 0)) {
                        if (++port == nb_ports)
                                port = 0;
                        continue;
                }

                struct rte_ring *tx_ring = p->dist_tx_ring;
                uint16_t sent = rte_ring_enqueue_burst(tx_ring,
                                (void *)bufs, nb_ret, NULL);
#else
                uint16_t nb_ret = nb_rx;
                /*
                 * Swap the following two lines if you want the rx traffic
                 * to go directly to tx, no distribution.
                 */
                struct rte_ring *out_ring = p->rx_dist_ring;
                /* struct rte_ring *out_ring = p->dist_tx_ring; */

                uint16_t sent = rte_ring_enqueue_burst(out_ring,
                                (void *)bufs, nb_ret, NULL);
#endif

                app_stats.rx.enqueued_pkts += sent;
                if (unlikely(sent < nb_ret)) {
                        app_stats.rx.enqdrop_pkts +=  nb_ret - sent;
                        RTE_LOG_DP(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;
        }
        /* set worker & tx threads quit flag */
        printf("\nCore %u exiting rx task.\n", rte_lcore_id());
        quit_signal = 1;
        return 0;
}

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

        if (unlikely(nb_tx < outbuf->count)) {
                app_stats.tx.enqdrop_pkts +=  outbuf->count - nb_tx;
                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_distributor(struct lcore_params *p)
{
        struct rte_ring *in_r = p->rx_dist_ring;
        struct rte_ring *out_r = p->dist_tx_ring;
        struct rte_mbuf *bufs[BURST_SIZE * 4];
        struct rte_distributor *d = p->d;

        printf("\nCore %u acting as distributor core.\n", rte_lcore_id());
        while (!quit_signal_dist) {
                const uint16_t nb_rx = rte_ring_dequeue_burst(in_r,
                                (void *)bufs, BURST_SIZE*1, NULL);
                if (nb_rx) {
                        app_stats.dist.in_pkts += nb_rx;

                        /* Distribute the packets */
                        rte_distributor_process(d, bufs, nb_rx);
                        /* Handle Returns */
                        const uint16_t nb_ret =
                                rte_distributor_returned_pkts(d,
                                        bufs, BURST_SIZE*2);

                        if (unlikely(nb_ret == 0))
                                continue;
                        app_stats.dist.ret_pkts += nb_ret;

                        uint16_t sent = rte_ring_enqueue_burst(out_r,
                                        (void *)bufs, nb_ret, NULL);
                        app_stats.dist.sent_pkts += sent;
                        if (unlikely(sent < nb_ret)) {
                                app_stats.dist.enqdrop_pkts += nb_ret - sent;
                                RTE_LOG(DEBUG, DISTRAPP,
                                        "%s:Packet loss due to full out ring\n",
                                        __func__);
                                while (sent < nb_ret)
                                        rte_pktmbuf_free(bufs[sent++]);
                        }
                }
        }
        printf("\nCore %u exiting distributor task.\n", rte_lcore_id());
        quit_signal_work = 1;

        rte_distributor_flush(d);
        /* Unblock any returns so workers can exit */
        rte_distributor_clear_returns(d);
        quit_signal_rx = 1;
        return 0;
}


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_TX];
                        const uint16_t nb_rx = rte_ring_dequeue_burst(in_r,
                                        (void *)bufs, BURST_SIZE_TX, NULL);
                        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_TX)
                                        flush_one_port(outbuf, outp);
                        }
                }
        }
        printf("\nCore %u exiting tx task.\n", rte_lcore_id());
        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_dist = 1;
}

static void
print_stats(void)
{
        struct rte_eth_stats eth_stats;
        unsigned int i, j;
        const unsigned int num_workers = rte_lcore_count() - 4;

        for (i = 0; i < rte_eth_dev_count(); i++) {
                rte_eth_stats_get(i, &eth_stats);
                app_stats.port_rx_pkts[i] = eth_stats.ipackets;
                app_stats.port_tx_pkts[i] = eth_stats.opackets;
        }

        printf("\n\nRX Thread:\n");
        for (i = 0; i < rte_eth_dev_count(); i++) {
                printf("Port %u Pktsin : %5.2f\n", i,
                                (app_stats.port_rx_pkts[i] -
                                prev_app_stats.port_rx_pkts[i])/1000000.0);
                prev_app_stats.port_rx_pkts[i] = app_stats.port_rx_pkts[i];
        }
        printf(" - Received:    %5.2f\n",
                        (app_stats.rx.rx_pkts -
                        prev_app_stats.rx.rx_pkts)/1000000.0);
        printf(" - Returned:    %5.2f\n",
                        (app_stats.rx.returned_pkts -
                        prev_app_stats.rx.returned_pkts)/1000000.0);
        printf(" - Enqueued:    %5.2f\n",
                        (app_stats.rx.enqueued_pkts -
                        prev_app_stats.rx.enqueued_pkts)/1000000.0);
        printf(" - Dropped:     %s%5.2f%s\n", ANSI_COLOR_RED,
                        (app_stats.rx.enqdrop_pkts -
                        prev_app_stats.rx.enqdrop_pkts)/1000000.0,
                        ANSI_COLOR_RESET);

        printf("Distributor thread:\n");
        printf(" - In:          %5.2f\n",
                        (app_stats.dist.in_pkts -
                        prev_app_stats.dist.in_pkts)/1000000.0);
        printf(" - Returned:    %5.2f\n",
                        (app_stats.dist.ret_pkts -
                        prev_app_stats.dist.ret_pkts)/1000000.0);
        printf(" - Sent:        %5.2f\n",
                        (app_stats.dist.sent_pkts -
                        prev_app_stats.dist.sent_pkts)/1000000.0);
        printf(" - Dropped      %s%5.2f%s\n", ANSI_COLOR_RED,
                        (app_stats.dist.enqdrop_pkts -
                        prev_app_stats.dist.enqdrop_pkts)/1000000.0,
                        ANSI_COLOR_RESET);

        printf("TX thread:\n");
        printf(" - Dequeued:    %5.2f\n",
                        (app_stats.tx.dequeue_pkts -
                        prev_app_stats.tx.dequeue_pkts)/1000000.0);
        for (i = 0; i < rte_eth_dev_count(); i++) {
                printf("Port %u Pktsout: %5.2f\n",
                                i, (app_stats.port_tx_pkts[i] -
                                prev_app_stats.port_tx_pkts[i])/1000000.0);
                prev_app_stats.port_tx_pkts[i] = app_stats.port_tx_pkts[i];
        }
        printf(" - Transmitted: %5.2f\n",
                        (app_stats.tx.tx_pkts -
                        prev_app_stats.tx.tx_pkts)/1000000.0);
        printf(" - Dropped:     %s%5.2f%s\n", ANSI_COLOR_RED,
                        (app_stats.tx.enqdrop_pkts -
                        prev_app_stats.tx.enqdrop_pkts)/1000000.0,
                        ANSI_COLOR_RESET);

        prev_app_stats.rx.rx_pkts = app_stats.rx.rx_pkts;
        prev_app_stats.rx.returned_pkts = app_stats.rx.returned_pkts;
        prev_app_stats.rx.enqueued_pkts = app_stats.rx.enqueued_pkts;
        prev_app_stats.rx.enqdrop_pkts = app_stats.rx.enqdrop_pkts;
        prev_app_stats.dist.in_pkts = app_stats.dist.in_pkts;
        prev_app_stats.dist.ret_pkts = app_stats.dist.ret_pkts;
        prev_app_stats.dist.sent_pkts = app_stats.dist.sent_pkts;
        prev_app_stats.dist.enqdrop_pkts = app_stats.dist.enqdrop_pkts;
        prev_app_stats.tx.dequeue_pkts = app_stats.tx.dequeue_pkts;
        prev_app_stats.tx.tx_pkts = app_stats.tx.tx_pkts;
        prev_app_stats.tx.enqdrop_pkts = app_stats.tx.enqdrop_pkts;

        for (i = 0; i < num_workers; i++) {
                printf("Worker %02u Pkts: %5.2f. Bursts(1-8): ", i,
                                (app_stats.worker_pkts[i] -
                                prev_app_stats.worker_pkts[i])/1000000.0);
                for (j = 0; j < 8; j++) {
                        printf("%"PRIu64" ", app_stats.worker_bursts[i][j]);
                        app_stats.worker_bursts[i][j] = 0;
                }
                printf("\n");
                prev_app_stats.worker_pkts[i] = app_stats.worker_pkts[i];
        }
}

static int
lcore_worker(struct lcore_params *p)
{
        struct rte_distributor *d = p->d;
        const unsigned id = p->worker_id;
        unsigned int num = 0;
        unsigned int i;

        /*
         * 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[8] __rte_cache_aligned;

        for (i = 0; i < 8; i++)
                buf[i] = NULL;

        app_stats.worker_pkts[p->worker_id] = 1;

        printf("\nCore %u acting as worker core.\n", rte_lcore_id());
        while (!quit_signal_work) {
                num = rte_distributor_get_pkt(d, id, buf, buf, num);
                /* Do a little bit of work for each packet */
                for (i = 0; i < num; i++) {
                        uint64_t t = rte_rdtsc()+100;

                        while (rte_rdtsc() < t)
                                rte_pause();
                        buf[i]->port ^= xor_val;
                }

                app_stats.worker_pkts[p->worker_id] += num;
                if (num > 0)
                        app_stats.worker_bursts[p->worker_id][num-1]++;
        }
        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 = 1; /* 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 *dist_tx_ring;
        struct rte_ring *rx_dist_ring;
        unsigned lcore_id, worker_id = 0;
        unsigned nb_ports;
        uint8_t portid;
        uint8_t nb_ports_available;
        uint64_t t, freq;

        /* 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() < 5)
                rte_exit(EXIT_FAILURE, "Error, This application needs at "
                                "least 5 logical cores to run:\n"
                                "1 lcore for stats (can be core 0)\n"
                                "1 lcore for packet RX\n"
                                "1 lcore for 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() - 4,
                        RTE_DIST_ALG_BURST);
        if (d == NULL)
                rte_exit(EXIT_FAILURE, "Cannot create distributor\n");

        /*
         * scheduler ring is read by the transmitter core, and written to
         * by scheduler core
         */
        dist_tx_ring = rte_ring_create("Output_ring", SCHED_TX_RING_SZ,
                        rte_socket_id(), RING_F_SC_DEQ | RING_F_SP_ENQ);
        if (dist_tx_ring == NULL)
                rte_exit(EXIT_FAILURE, "Cannot create output ring\n");

        rx_dist_ring = rte_ring_create("Input_ring", SCHED_RX_RING_SZ,
                        rte_socket_id(), RING_F_SC_DEQ | RING_F_SP_ENQ);
        if (rx_dist_ring == NULL)
                rte_exit(EXIT_FAILURE, "Cannot create output ring\n");

        RTE_LCORE_FOREACH_SLAVE(lcore_id) {
                if (worker_id == rte_lcore_count() - 3) {
                        printf("Starting distributor on lcore_id %d\n",
                                        lcore_id);
                        /* distributor core */
                        struct lcore_params *p =
                                        rte_malloc(NULL, sizeof(*p), 0);
                        if (!p)
                                rte_panic("malloc failure\n");
                        *p = (struct lcore_params){worker_id, d,
                                rx_dist_ring, dist_tx_ring, mbuf_pool};
                        rte_eal_remote_launch(
                                (lcore_function_t *)lcore_distributor,
                                p, lcore_id);
                } else if (worker_id == rte_lcore_count() - 4) {
                        printf("Starting tx  on worker_id %d, lcore_id %d\n",
                                        worker_id, lcore_id);
                        /* tx core */
                        rte_eal_remote_launch((lcore_function_t *)lcore_tx,
                                        dist_tx_ring, lcore_id);
                } else if (worker_id == rte_lcore_count() - 2) {
                        printf("Starting rx on worker_id %d, lcore_id %d\n",
                                        worker_id, lcore_id);
                        /* rx core */
                        struct lcore_params *p =
                                        rte_malloc(NULL, sizeof(*p), 0);
                        if (!p)
                                rte_panic("malloc failure\n");
                        *p = (struct lcore_params){worker_id, d, rx_dist_ring,
                                        dist_tx_ring, mbuf_pool};
                        rte_eal_remote_launch((lcore_function_t *)lcore_rx,
                                        p, lcore_id);
                } else {
                        printf("Starting worker on worker_id %d, lcore_id %d\n",
                                        worker_id, lcore_id);
                        struct lcore_params *p =
                                        rte_malloc(NULL, sizeof(*p), 0);
                        if (!p)
                                rte_panic("malloc failure\n");
                        *p = (struct lcore_params){worker_id, d, rx_dist_ring,
                                        dist_tx_ring, mbuf_pool};

                        rte_eal_remote_launch((lcore_function_t *)lcore_worker,
                                        p, lcore_id);
                }
                worker_id++;
        }

        freq = rte_get_timer_hz();
        t = rte_rdtsc() + freq;
        while (!quit_signal_dist) {
                if (t < rte_rdtsc()) {
                        print_stats();
                        t = rte_rdtsc() + freq;
                }
                usleep(1000);
        }

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

        print_stats();
        return 0;
}