examples/helloworld/main.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation
 */
 
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <errno.h>
#include <sys/queue.h>
 
#include <rte_memory.h>
#include <rte_launch.h>
#include <rte_eal.h>
#include <rte_per_lcore.h>
#include <rte_lcore.h>
#include <rte_debug.h>
 
/* Launch a function on lcore. 8< */
static int
lcore_hello(__rte_unused void *arg)
{
    unsigned lcore_id;
    lcore_id = rte_lcore_id();
    printf("hello from core %u\n", lcore_id);
    return 0;
}
/* >8 End of launching function on lcore. */
 
/* Initialization of Environment Abstraction Layer (EAL). 8< */
int
main(int argc, char **argv)
{
    int ret;
    unsigned lcore_id;
 
    ret = rte_eal_init(argc, argv);
    if (ret < 0)
        rte_panic("Cannot init EAL\n");
    /* >8 End of initialization of Environment Abstraction Layer */
 
    /* Launches the function on each lcore. 8< */
    RTE_LCORE_FOREACH_WORKER(lcore_id) {
        /* Simpler equivalent. 8< */
        rte_eal_remote_launch(lcore_hello, NULL, lcore_id);
        /* >8 End of simpler equivalent. */
    }
 
    /* call it on main lcore too */
    lcore_hello(NULL);
    /* >8 End of launching the function on each lcore. */
 
    rte_eal_mp_wait_lcore();
 
    /* clean up the EAL */
    rte_eal_cleanup();
 
    return 0;
}