DPDK多进程；杀死一个主进程并重新启动为副进程无法工作。

在DPDK多进程中，当主进程被杀死并以副进程的形式重新启动时，可能会遇到问题。最好的解决方法是在副进程中使用rte_eal_init()函数来重新初始化DPDK环境。以下是示例代码：

#include <stdio.h> #include <stdint.h> #include <unistd.h> #include <stdbool.h> #include <string.h> #include <errno.h> #include <fcntl.h> #include <rte_eal.h> #include <rte_lcore.h> #include <rte_errno.h>

#define MAX_LCORES 64

int main(int argc, char **argv) { int ret; unsigned lcore_id, core_count = 0; bool is_secondary = false;

ret = rte_eal_init(argc, argv);
if (ret < 0)
    return ret;

/* determine if this process is a secondary process */
for (lcore_id = 0; lcore_id < MAX_LCORES; lcore_id++) {
    if (rte_eal_get_lcore_state(lcore_id) == RTE_LCORE_PRESENT)
        core_count++;
    if (rte_eal_get_lcore_state(lcore_id) == RTE_LCORE_SECONDARY)
        is_secondary = true;
}

if (!is_secondary) {
    /* kill the primary process */
    int pid = getpid();
    printf("primary process pid: %d\n", pid);
    kill(pid, SIGTERM);

    /* wait for the primary process to exit */
    printf("waiting for primary process to exit...\n");
    while (kill(pid, 0) == 0)
        usleep(10000);

    /* reinitialize environment */
    printf("reinitializing environment...\n");
    ret = rte_eal_init(argc, argv);
    if (ret < 0)
        return ret;
}

/* secondary process code */
printf("secondary process started!\n");
/* do something here */

return 0;

}