[dpdk-dev] [PATCH 1/2] virtio: fix rx stats with vectorized functions

[Thierry Herbelot <thierry.herbelot@6wind.com>]

From: Thibaut Collet <thibaut.collet@6wind.com>

With vectorized functions, only the rx stats for number of packets is
incremented.
Update also the other statistics.
Performance impact is about 2%

Fixes: fc3d66212fed ("virtio: add vector Rx")
Cc: stable@dpdk.org
Cc: maxime.coquelin@redhat.com
Cc: tiwei.bie@intel.com
Cc: zhihong.wang@intel.com

Signed-off-by: Thibaut Collet <thibaut.collet@6wind.com>
---
 drivers/net/virtio/virtio_rxtx.c             | 2 +-
 drivers/net/virtio/virtio_rxtx.h             | 2 ++
 drivers/net/virtio/virtio_rxtx_simple_neon.c | 5 +++++
 drivers/net/virtio/virtio_rxtx_simple_sse.c  | 5 +++++
 4 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
index 27ead19fbe81..6dd62bf51863 100644
--- a/drivers/net/virtio/virtio_rxtx.c
+++ b/drivers/net/virtio/virtio_rxtx.c
@@ -1083,7 +1083,7 @@ virtio_discard_rxbuf_inorder(struct virtqueue *vq, struct rte_mbuf *m)
 	}
 }
 
-static inline void
+void
 virtio_update_packet_stats(struct virtnet_stats *stats, struct rte_mbuf *mbuf)
 {
 	uint32_t s = mbuf->pkt_len;
diff --git a/drivers/net/virtio/virtio_rxtx.h b/drivers/net/virtio/virtio_rxtx.h
index 685cc4f8104c..1eb8dae227ee 100644
--- a/drivers/net/virtio/virtio_rxtx.h
+++ b/drivers/net/virtio/virtio_rxtx.h
@@ -59,5 +59,7 @@ struct virtnet_ctl {
 };
 
 int virtio_rxq_vec_setup(struct virtnet_rx *rxvq);
+void virtio_update_packet_stats(struct virtnet_stats *stats,
+				struct rte_mbuf *mbuf);
 
 #endif /* _VIRTIO_RXTX_H_ */
diff --git a/drivers/net/virtio/virtio_rxtx_simple_neon.c b/drivers/net/virtio/virtio_rxtx_simple_neon.c
index cdc2a4d28ed5..70e89fc428e0 100644
--- a/drivers/net/virtio/virtio_rxtx_simple_neon.c
+++ b/drivers/net/virtio/virtio_rxtx_simple_neon.c
@@ -47,6 +47,7 @@ virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 	struct vring_used_elem *rused;
 	struct rte_mbuf **sw_ring;
 	struct rte_mbuf **sw_ring_end;
+	struct rte_mbuf **ref_rx_pkts;
 	uint16_t nb_pkts_received = 0;
 
 	uint8x16_t shuf_msk1 = {
@@ -105,6 +106,7 @@ virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 			virtqueue_notify(vq);
 	}
 
+	ref_rx_pkts = rx_pkts;
 	for (nb_pkts_received = 0;
 		nb_pkts_received < nb_used;) {
 		uint64x2_t desc[RTE_VIRTIO_DESC_PER_LOOP / 2];
@@ -204,5 +206,8 @@ virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 	vq->vq_used_cons_idx += nb_pkts_received;
 	vq->vq_free_cnt += nb_pkts_received;
 	rxvq->stats.packets += nb_pkts_received;
+	for (nb_used = 0; nb_used < nb_pkts_received; nb_used++)
+		virtio_update_packet_stats(&rxvq->stats, ref_rx_pkts[nb_used]);
+
 	return nb_pkts_received;
 }
diff --git a/drivers/net/virtio/virtio_rxtx_simple_sse.c b/drivers/net/virtio/virtio_rxtx_simple_sse.c
index af76708d66ae..cb1610e71563 100644
--- a/drivers/net/virtio/virtio_rxtx_simple_sse.c
+++ b/drivers/net/virtio/virtio_rxtx_simple_sse.c
@@ -48,6 +48,7 @@ virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 	struct vring_used_elem *rused;
 	struct rte_mbuf **sw_ring;
 	struct rte_mbuf **sw_ring_end;
+	struct rte_mbuf **ref_rx_pkts;
 	uint16_t nb_pkts_received = 0;
 	__m128i shuf_msk1, shuf_msk2, len_adjust;
 
@@ -107,6 +108,7 @@ virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 			virtqueue_notify(vq);
 	}
 
+	ref_rx_pkts = rx_pkts;
 	for (nb_pkts_received = 0;
 		nb_pkts_received < nb_used;) {
 		__m128i desc[RTE_VIRTIO_DESC_PER_LOOP / 2];
@@ -190,5 +192,8 @@ virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 	vq->vq_used_cons_idx += nb_pkts_received;
 	vq->vq_free_cnt += nb_pkts_received;
 	rxvq->stats.packets += nb_pkts_received;
+	for (nb_used = 0; nb_used < nb_pkts_received; nb_used++)
+		virtio_update_packet_stats(&rxvq->stats, ref_rx_pkts[nb_used]);
+
 	return nb_pkts_received;
 }
-- 
2.20.1