VPP:rte_mbuf + (sizeof(vlib_buffer_t)-VLIB_BUFFER_PRE_DATA_SIZE)
+VLIB_BUFFER_PRE_DATA_SIZE + VLIB_BUFFER_DATA_SIZE
128 128 128 2048
DPDK:rte_mbuf + priv_size + RTE_PKTMBUF_HEADROOM + RTE_MBUF_DEFAULT_DATAROOM
128 一般为0 128 2048
同时阅读: https://blog.csdn.net/shaoyunzhe/article/details/79036231