On Sun, 24 Jul 2022 16:10:03 +0800 Huichao Cai <chcch...@163.com> wrote:
> + > + /* > + * Formal parameter checking. > + */ > + if (unlikely(pkt_in == NULL) || unlikely(pkts_out == NULL) || > + unlikely(nb_pkts_out == 0) || unlikely(pool_direct == NULL) || > + unlikely(mtu_size < RTE_ETHER_MIN_MTU)) > + return -EINVAL; > + > + in_hdr = rte_pktmbuf_mtod(pkt_in, struct rte_ipv4_hdr *); > + header_len = (in_hdr->version_ihl & RTE_IPV4_HDR_IHL_MASK) * > + RTE_IPV4_IHL_MULTIPLIER; > + > + /* Check IP header length */ > + if (unlikely(pkt_in->data_len < header_len) || > + unlikely(mtu_size < header_len)) > + return -EINVAL; > + My suspicions are all this input parameter checking probably costs more than any performance gain of having a non-segmented fast path.
