vector unsigned char desc[RTE_VIRTIO_DESC_PER_LOOP / 2];
vector unsigned char mbp[RTE_VIRTIO_DESC_PER_LOOP / 2];
vector unsigned char pkt_mb[RTE_VIRTIO_DESC_PER_LOOP];
vector unsigned char desc[RTE_VIRTIO_DESC_PER_LOOP / 2];
vector unsigned char mbp[RTE_VIRTIO_DESC_PER_LOOP / 2];
vector unsigned char pkt_mb[RTE_VIRTIO_DESC_PER_LOOP];