WindowsDPDKL2fwd-接收到乱序数据包

Windows上的DPDK L2fwd应用程序可能会接收到乱序数据包，这可能会影响网络性能。为了解决这个问题，您可以将DPDK的ETH_RSS_NONFRAG_IPV4_TCP和ETH_RSS_NONFRAG_IPV4_UDP哈希函数配置为使用TCP或UDP端口信息生成哈希键。

以下是使用TCP端口信息进行哈希化的代码示例：

#define NUM_MBUFS 8191
#define MBUF_CACHE_SIZE 250
#define BURST_SIZE 32

struct rte_mempool *mbuf_pool;

static const struct rte_eth_conf port_conf_default = {
    .rxmode = { .max_rx_pkt_len = ETHER_MAX_LEN }
};

static uint16_t
l2fwd_simple_forward(struct lcore_queue_conf *qconf, uint16_t portid,
        struct rte_mbuf *m)
{
    uint16_t dst_port;
    struct ether_hdr *eth;
    void *tmp;
    struct ipv4_hdr *ipv4_hdr;
    struct udp_hdr *udp;
    struct tcp_hdr *tcp;
    int hash_id;

    eth = rte_pktmbuf_mtod(m, struct ether_hdr *);
    if (eth->ether_type == rte_cpu_to_be_16(ETHER_TYPE_IPv4)) {
        ipv4_hdr = (struct ipv4_hdr *)(eth + 1);
        tmp = ipv4_hdr + 1;
        if (ipv4_hdr->next_proto_id == IPPROTO_UDP) {
            udp = (struct udp_hdr *)tmp;
            hash_id = udp->dst_port;
        } else if (ipv4_hdr->next_proto_id == IPPROTO_TCP) {
            tcp = (struct tcp_hdr *)tmp;
            hash_id = tcp->dst_port;
        } else {
            hash_id = ipv4_hdr->next_proto_id;
        }
    } else {
        hash_id = eth->ether_type;
    }

    dst_port = qconf->tx_queue_id[hash_id & NUM_TX_QUEUE_MASK];
    rte_eth_tx_buffer(dst_port, 0, qconf->tx_mbufs[hash_id & NUM_TX_QUEUE_MASK], m);

    return dst_port;
}

static void
l2fwd_rx_loop_stat(void)
{
    struct rte_mbuf *pkts_burst[BURST_SIZE];
    struct lcore_queue_conf *qconf;
    unsigned lcore_id;
    uint64_t prev_tsc, diff_tsc, cur_tsc, timer_tsc;
    uint64_t total_rx_packets = 0, total_tx_packets = 0;
    uint64_t total_packets_dropped = 0;
    unsigned i, portid, nb