bump version to 12.2.12-pve1

[ceph.git] / ceph / src / dpdk / examples / vmdq_dcb / main.c

/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdint.h>
#include <sys/queue.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <inttypes.h>
#include <getopt.h>

#include <rte_common.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_log.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>
#include <rte_memcpy.h>

/* basic constants used in application */
#define MAX_QUEUES 1024
/*
 * 1024 queues require to meet the needs of a large number of vmdq_pools.
 * (RX/TX_queue_nb * RX/TX_ring_descriptors_nb) per port.
 */
#define NUM_MBUFS_PER_PORT (MAX_QUEUES * RTE_MAX(RTE_TEST_RX_DESC_DEFAULT, \
                                                RTE_TEST_TX_DESC_DEFAULT))
#define MBUF_CACHE_SIZE 64

#define MAX_PKT_BURST 32

/*
 * Configurable number of RX/TX ring descriptors
 */
#define RTE_TEST_RX_DESC_DEFAULT 128
#define RTE_TEST_TX_DESC_DEFAULT 512

#define INVALID_PORT_ID 0xFF

/* mask of enabled ports */
static uint32_t enabled_port_mask;
static uint8_t ports[RTE_MAX_ETHPORTS];
static unsigned num_ports;

/* number of pools (if user does not specify any, 32 by default */
static enum rte_eth_nb_pools num_pools = ETH_32_POOLS;
static enum rte_eth_nb_tcs   num_tcs   = ETH_4_TCS;
static uint16_t num_queues, num_vmdq_queues;
static uint16_t vmdq_pool_base, vmdq_queue_base;
static uint8_t rss_enable;

/* empty vmdq+dcb configuration structure. Filled in programatically */
static const struct rte_eth_conf vmdq_dcb_conf_default = {
        .rxmode = {
                .mq_mode        = ETH_MQ_RX_VMDQ_DCB,
                .split_hdr_size = 0,
                .header_split   = 0, /**< Header Split disabled */
                .hw_ip_checksum = 0, /**< IP checksum offload disabled */
                .hw_vlan_filter = 0, /**< VLAN filtering disabled */
                .jumbo_frame    = 0, /**< Jumbo Frame Support disabled */
        },
        .txmode = {
                .mq_mode = ETH_MQ_TX_VMDQ_DCB,
        },
        /*
         * should be overridden separately in code with
         * appropriate values
         */
        .rx_adv_conf = {
                .vmdq_dcb_conf = {
                        .nb_queue_pools = ETH_32_POOLS,
                        .enable_default_pool = 0,
                        .default_pool = 0,
                        .nb_pool_maps = 0,
                        .pool_map = {{0, 0},},
                        .dcb_tc = {0},
                },
                .dcb_rx_conf = {
                                .nb_tcs = ETH_4_TCS,
                                /** Traffic class each UP mapped to. */
                                .dcb_tc = {0},
                },
                .vmdq_rx_conf = {
                        .nb_queue_pools = ETH_32_POOLS,
                        .enable_default_pool = 0,
                        .default_pool = 0,
                        .nb_pool_maps = 0,
                        .pool_map = {{0, 0},},
                },
        },
        .tx_adv_conf = {
                .vmdq_dcb_tx_conf = {
                        .nb_queue_pools = ETH_32_POOLS,
                        .dcb_tc = {0},
                },
        },
};

/* array used for printing out statistics */
volatile unsigned long rxPackets[MAX_QUEUES] = {0};

const uint16_t vlan_tags[] = {
        0,  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
};

const uint16_t num_vlans = RTE_DIM(vlan_tags);
/* pool mac addr template, pool mac addr is like: 52 54 00 12 port# pool# */
static struct ether_addr pool_addr_template = {
        .addr_bytes = {0x52, 0x54, 0x00, 0x12, 0x00, 0x00}
};

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

/* Builds up the correct configuration for vmdq+dcb based on the vlan tags array
 * given above, and the number of traffic classes available for use. */
static inline int
get_eth_conf(struct rte_eth_conf *eth_conf)
{
        struct rte_eth_vmdq_dcb_conf conf;
        struct rte_eth_vmdq_rx_conf  vmdq_conf;
        struct rte_eth_dcb_rx_conf   dcb_conf;
        struct rte_eth_vmdq_dcb_tx_conf tx_conf;
        uint8_t i;

        conf.nb_queue_pools = (enum rte_eth_nb_pools)num_pools;
        vmdq_conf.nb_queue_pools = (enum rte_eth_nb_pools)num_pools;
        tx_conf.nb_queue_pools = (enum rte_eth_nb_pools)num_pools;
        conf.nb_pool_maps = num_pools;
        vmdq_conf.nb_pool_maps = num_pools;
        conf.enable_default_pool = 0;
        vmdq_conf.enable_default_pool = 0;
        conf.default_pool = 0; /* set explicit value, even if not used */
        vmdq_conf.default_pool = 0;

        for (i = 0; i < conf.nb_pool_maps; i++) {
                conf.pool_map[i].vlan_id = vlan_tags[i];
                vmdq_conf.pool_map[i].vlan_id = vlan_tags[i];
                conf.pool_map[i].pools = 1UL << i;
                vmdq_conf.pool_map[i].pools = 1UL << i;
        }
        for (i = 0; i < ETH_DCB_NUM_USER_PRIORITIES; i++){
                conf.dcb_tc[i] = i % num_tcs;
                dcb_conf.dcb_tc[i] = i % num_tcs;
                tx_conf.dcb_tc[i] = i % num_tcs;
        }
        dcb_conf.nb_tcs = (enum rte_eth_nb_tcs)num_tcs;
        (void)(rte_memcpy(eth_conf, &vmdq_dcb_conf_default, sizeof(*eth_conf)));
        (void)(rte_memcpy(&eth_conf->rx_adv_conf.vmdq_dcb_conf, &conf,
                          sizeof(conf)));
        (void)(rte_memcpy(&eth_conf->rx_adv_conf.dcb_rx_conf, &dcb_conf,
                          sizeof(dcb_conf)));
        (void)(rte_memcpy(&eth_conf->rx_adv_conf.vmdq_rx_conf, &vmdq_conf,
                          sizeof(vmdq_conf)));
        (void)(rte_memcpy(&eth_conf->tx_adv_conf.vmdq_dcb_tx_conf, &tx_conf,
                          sizeof(tx_conf)));
        if (rss_enable) {
                eth_conf->rxmode.mq_mode = ETH_MQ_RX_VMDQ_DCB_RSS;
                eth_conf->rx_adv_conf.rss_conf.rss_hf = ETH_RSS_IP |
                                                        ETH_RSS_UDP |
                                                        ETH_RSS_TCP |
                                                        ETH_RSS_SCTP;
        }
        return 0;
}

/*
 * 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_dev_info dev_info;
        struct rte_eth_conf port_conf = {0};
        const uint16_t rxRingSize = RTE_TEST_RX_DESC_DEFAULT;
        const uint16_t txRingSize = RTE_TEST_TX_DESC_DEFAULT;
        int retval;
        uint16_t q;
        uint16_t queues_per_pool;
        uint32_t max_nb_pools;

        /*
         * The max pool number from dev_info will be used to validate the pool
         * number specified in cmd line
         */
        rte_eth_dev_info_get(port, &dev_info);
        max_nb_pools = (uint32_t)dev_info.max_vmdq_pools;
        /*
         * We allow to process part of VMDQ pools specified by num_pools in
         * command line.
         */
        if (num_pools > max_nb_pools) {
                printf("num_pools %d >max_nb_pools %d\n",
                        num_pools, max_nb_pools);
                return -1;
        }

        /*
         * NIC queues are divided into pf queues and vmdq queues.
         * There is assumption here all ports have the same configuration!
        */
        vmdq_queue_base = dev_info.vmdq_queue_base;
        vmdq_pool_base  = dev_info.vmdq_pool_base;
        printf("vmdq queue base: %d pool base %d\n",
                vmdq_queue_base, vmdq_pool_base);
        if (vmdq_pool_base == 0) {
                num_vmdq_queues = dev_info.max_rx_queues;
                num_queues = dev_info.max_rx_queues;
                if (num_tcs != num_vmdq_queues / num_pools) {
                        printf("nb_tcs %d is invalid considering with"
                                " nb_pools %d, nb_tcs * nb_pools should = %d\n",
                                num_tcs, num_pools, num_vmdq_queues);
                        return -1;
                }
        } else {
                queues_per_pool = dev_info.vmdq_queue_num /
                                  dev_info.max_vmdq_pools;
                if (num_tcs > queues_per_pool) {
                        printf("num_tcs %d > num of queues per pool %d\n",
                                num_tcs, queues_per_pool);
                        return -1;
                }
                num_vmdq_queues = num_pools * queues_per_pool;
                num_queues = vmdq_queue_base + num_vmdq_queues;
                printf("Configured vmdq pool num: %u,"
                        " each vmdq pool has %u queues\n",
                        num_pools, queues_per_pool);
        }

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

        retval = get_eth_conf(&port_conf);
        if (retval < 0)
                return retval;

        /*
         * Though in this example, all queues including pf queues are setup.
         * This is because VMDQ queues doesn't always start from zero, and the
         * PMD layer doesn't support selectively initialising part of rx/tx
         * queues.
         */
        retval = rte_eth_dev_configure(port, num_queues, num_queues, &port_conf);
        if (retval != 0)
                return retval;

        for (q = 0; q < num_queues; q++) {
                retval = rte_eth_rx_queue_setup(port, q, rxRingSize,
                                        rte_eth_dev_socket_id(port),
                                        NULL,
                                        mbuf_pool);
                if (retval < 0) {
                        printf("initialize rx queue %d failed\n", q);
                        return retval;
                }
        }

        for (q = 0; q < num_queues; q++) {
                retval = rte_eth_tx_queue_setup(port, q, txRingSize,
                                        rte_eth_dev_socket_id(port),
                                        NULL);
                if (retval < 0) {
                        printf("initialize tx queue %d failed\n", q);
                        return retval;
                }
        }

        retval  = rte_eth_dev_start(port);
        if (retval < 0) {
                printf("port %d start failed\n", port);
                return retval;
        }

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

        /* Set mac for each pool.*/
        for (q = 0; q < num_pools; q++) {
                struct ether_addr mac;

                mac = pool_addr_template;
                mac.addr_bytes[4] = port;
                mac.addr_bytes[5] = q;
                printf("Port %u vmdq pool %u set mac %02x:%02x:%02x:%02x:%02x:%02x\n",
                        port, q,
                        mac.addr_bytes[0], mac.addr_bytes[1],
                        mac.addr_bytes[2], mac.addr_bytes[3],
                        mac.addr_bytes[4], mac.addr_bytes[5]);
                retval = rte_eth_dev_mac_addr_add(port, &mac,
                                q + vmdq_pool_base);
                if (retval) {
                        printf("mac addr add failed at pool %d\n", q);
                        return retval;
                }
        }

        return 0;
}

/* Check num_pools parameter and set it if OK*/
static int
vmdq_parse_num_pools(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 != 16 && n != 32)
                return -1;
        if (n == 16)
                num_pools = ETH_16_POOLS;
        else
                num_pools = ETH_32_POOLS;

        return 0;
}

/* Check num_tcs parameter and set it if OK*/
static int
vmdq_parse_num_tcs(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 != 4 && n != 8)
                return -1;
        if (n == 4)
                num_tcs = ETH_4_TCS;
        else
                num_tcs = ETH_8_TCS;

        return 0;
}

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;
}

/* Display usage */
static void
vmdq_usage(const char *prgname)
{
        printf("%s [EAL options] -- -p PORTMASK]\n"
        "  --nb-pools NP: number of pools (32 default, 16)\n"
        "  --nb-tcs NP: number of TCs (4 default, 8)\n"
        "  --enable-rss: enable RSS (disabled by default)\n",
               prgname);
}

/*  Parse the argument (num_pools) given in the command line of the application */
static int
vmdq_parse_args(int argc, char **argv)
{
        int opt;
        int option_index;
        unsigned i;
        const char *prgname = argv[0];
        static struct option long_option[] = {
                {"nb-pools", required_argument, NULL, 0},
                {"nb-tcs", required_argument, NULL, 0},
                {"enable-rss", 0, NULL, 0},
                {NULL, 0, 0, 0}
        };

        /* Parse command line */
        while ((opt = getopt_long(argc, argv, "p:", long_option,
                &option_index)) != EOF) {
                switch (opt) {
                /* portmask */
                case 'p':
                        enabled_port_mask = parse_portmask(optarg);
                        if (enabled_port_mask == 0) {
                                printf("invalid portmask\n");
                                vmdq_usage(prgname);
                                return -1;
                        }
                        break;
                case 0:
                        if (!strcmp(long_option[option_index].name, "nb-pools")) {
                                if (vmdq_parse_num_pools(optarg) == -1) {
                                        printf("invalid number of pools\n");
                                        return -1;
                                }
                        }

                        if (!strcmp(long_option[option_index].name, "nb-tcs")) {
                                if (vmdq_parse_num_tcs(optarg) == -1) {
                                        printf("invalid number of tcs\n");
                                        return -1;
                                }
                        }

                        if (!strcmp(long_option[option_index].name, "enable-rss"))
                                rss_enable = 1;
                        break;

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

        for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
                if (enabled_port_mask & (1 << i))
                        ports[num_ports++] = (uint8_t)i;
        }

        if (num_ports < 2 || num_ports % 2) {
                printf("Current enabled port number is %u,"
                        " but it should be even and at least 2\n", num_ports);
                return -1;
        }

        return 0;
}

static void
update_mac_address(struct rte_mbuf *m, unsigned dst_port)
{
        struct ether_hdr *eth;
        void *tmp;

        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(&vmdq_ports_eth_addr[dst_port], &eth->s_addr);
}

/* When we receive a HUP signal, print out our stats */
static void
sighup_handler(int signum)
{
        unsigned q = vmdq_queue_base;

        for (; q < num_queues; q++) {
                if (q % (num_vmdq_queues / num_pools) == 0)
                        printf("\nPool %u: ", (q - vmdq_queue_base) /
                                              (num_vmdq_queues / num_pools));
                printf("%lu ", rxPackets[q]);
        }
        printf("\nFinished handling signal %d\n", signum);
}

/*
 * Main thread that does the work, reading from INPUT_PORT
 * and writing to OUTPUT_PORT
 */
static int
lcore_main(void *arg)
{
        const uintptr_t core_num = (uintptr_t)arg;
        const unsigned num_cores = rte_lcore_count();
        uint16_t startQueue, endQueue;
        uint16_t q, i, p;
        const uint16_t quot = (uint16_t)(num_vmdq_queues / num_cores);
        const uint16_t remainder = (uint16_t)(num_vmdq_queues % num_cores);


        if (remainder) {
                if (core_num < remainder) {
                        startQueue = (uint16_t)(core_num * (quot + 1));
                        endQueue = (uint16_t)(startQueue + quot + 1);
                } else {
                        startQueue = (uint16_t)(core_num * quot + remainder);
                        endQueue = (uint16_t)(startQueue + quot);
                }
        } else {
                startQueue = (uint16_t)(core_num * quot);
                endQueue = (uint16_t)(startQueue + quot);
        }

        /* vmdq queue idx doesn't always start from zero.*/
        startQueue += vmdq_queue_base;
        endQueue   += vmdq_queue_base;
        printf("Core %u(lcore %u) reading queues %i-%i\n", (unsigned)core_num,
               rte_lcore_id(), startQueue, endQueue - 1);

        if (startQueue == endQueue) {
                printf("lcore %u has nothing to do\n", (unsigned)core_num);
                return 0;
        }

        for (;;) {
                struct rte_mbuf *buf[MAX_PKT_BURST];
                const uint16_t buf_size = sizeof(buf) / sizeof(buf[0]);
                for (p = 0; p < num_ports; p++) {
                        const uint8_t src = ports[p];
                        const uint8_t dst = ports[p ^ 1]; /* 0 <-> 1, 2 <-> 3 etc */

                        if ((src == INVALID_PORT_ID) || (dst == INVALID_PORT_ID))
                                continue;

                        for (q = startQueue; q < endQueue; q++) {
                                const uint16_t rxCount = rte_eth_rx_burst(src,
                                        q, buf, buf_size);

                                if (unlikely(rxCount == 0))
                                        continue;

                                rxPackets[q] += rxCount;

                                for (i = 0; i < rxCount; i++)
                                        update_mac_address(buf[i], dst);

                                const uint16_t txCount = rte_eth_tx_burst(dst,
                                        q, buf, rxCount);
                                if (txCount != rxCount) {
                                        for (i = txCount; i < rxCount; i++)
                                                rte_pktmbuf_free(buf[i]);
                                }
                        }
                }
        }
}

/*
 * Update the global var NUM_PORTS and array PORTS according to system ports number
 * and return valid ports number
 */
static unsigned check_ports_num(unsigned nb_ports)
{
        unsigned valid_num_ports = num_ports;
        unsigned portid;

        if (num_ports > nb_ports) {
                printf("\nSpecified port number(%u) exceeds total system port number(%u)\n",
                        num_ports, nb_ports);
                num_ports = nb_ports;
        }

        for (portid = 0; portid < num_ports; portid++) {
                if (ports[portid] >= nb_ports) {
                        printf("\nSpecified port ID(%u) exceeds max system port ID(%u)\n",
                                ports[portid], (nb_ports - 1));
                        ports[portid] = INVALID_PORT_ID;
                        valid_num_ports--;
                }
        }
        return valid_num_ports;
}


/* Main function, does initialisation and calls the per-lcore functions */
int
main(int argc, char *argv[])
{
        unsigned cores;
        struct rte_mempool *mbuf_pool;
        unsigned lcore_id;
        uintptr_t i;
        int ret;
        unsigned nb_ports, valid_num_ports;
        uint8_t portid;

        signal(SIGHUP, sighup_handler);

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

        /* parse app arguments */
        ret = vmdq_parse_args(argc, argv);
        if (ret < 0)
                rte_exit(EXIT_FAILURE, "Invalid VMDQ argument\n");

        cores = rte_lcore_count();
        if ((cores & (cores - 1)) != 0 || cores > RTE_MAX_LCORE) {
                rte_exit(EXIT_FAILURE,"This program can only run on an even"
                                " number of cores(1-%d)\n\n", RTE_MAX_LCORE);
        }

        nb_ports = rte_eth_dev_count();

        /*
         * Update the global var NUM_PORTS and global array PORTS
         * and get value of var VALID_NUM_PORTS according to system ports number
         */
        valid_num_ports = check_ports_num(nb_ports);

        if (valid_num_ports < 2 || valid_num_ports % 2) {
                printf("Current valid ports number is %u\n", valid_num_ports);
                rte_exit(EXIT_FAILURE, "Error with valid ports number is not even or less than 2\n");
        }

        mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
                NUM_MBUFS_PER_PORT * 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");

        /* 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);
                        continue;
                }
                if (port_init(portid, mbuf_pool) != 0)
                        rte_exit(EXIT_FAILURE, "Cannot initialize network ports\n");
        }

        /* call lcore_main() on every slave lcore */
        i = 0;
        RTE_LCORE_FOREACH_SLAVE(lcore_id) {
                rte_eal_remote_launch(lcore_main, (void*)i++, lcore_id);
        }
        /* call on master too */
        (void) lcore_main((void*)i);

        return 0;
}