[dpdk-dev] [RFC 4/6] net/virtio: revert the changes in 18dc1b1ac

[Tiwei Bie]

Revert the changes in 18dc1b1ac, because we want to test the
performance similar to the real world case.

Signed-off-by: Tiwei Bie <tiwei....@intel.com>
---
 drivers/net/virtio/virtio_rxtx.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
index 3983626..7be9aae 100644
--- a/drivers/net/virtio/virtio_rxtx.c
+++ b/drivers/net/virtio/virtio_rxtx.c
@@ -139,9 +139,7 @@ virtqueue_dequeue_burst_rx(struct virtqueue *vq, struct 
rte_mbuf **rx_pkts,
                }
 
                rte_prefetch0(cookie);
-#if 0
                rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *));
-#endif
                rx_pkts[i]  = cookie;
                vq->vq_used_cons_idx++;
                vq_ring_free_chain(vq, desc_idx);
@@ -512,9 +510,7 @@ static void
 virtio_update_packet_stats(struct virtnet_stats *stats, struct rte_mbuf *mbuf)
 {
        uint32_t s = mbuf->pkt_len;
-#if 0
        struct ether_addr *ea;
-#endif
 
        if (s == 64) {
                stats->size_bins[1]++;
@@ -533,7 +529,6 @@ virtio_update_packet_stats(struct virtnet_stats *stats, 
struct rte_mbuf *mbuf)
                        stats->size_bins[7]++;
        }
 
-#if 0
        ea = rte_pktmbuf_mtod(mbuf, struct ether_addr *);
        if (is_multicast_ether_addr(ea)) {
                if (is_broadcast_ether_addr(ea))
@@ -541,7 +536,6 @@ virtio_update_packet_stats(struct virtnet_stats *stats, 
struct rte_mbuf *mbuf)
                else
                        stats->multicast++;
        }
-#endif
 }
 
 /* Optionally fill offload information in structure */
@@ -664,6 +658,9 @@ virtio_recv_pkts_1_1(void *rx_queue, struct rte_mbuf 
**rx_pkts, uint16_t nb_pkts
 
                dxp = &vq->vq_descx[used_idx & (vq->vq_nentries - 1)];
 
+               rte_packet_prefetch(rte_pktmbuf_mtod(
+                               (struct rte_mbuf *)dxp->cookie, void *));
+
                len = desc->len;
                rxm = dxp->cookie;
                dxp->cookie = nmb;
-- 
2.7.4