[dpdk-dev] [PATCH v2] net/i40e: mbuf alloc failed counter not incremented

[Allain Legacy <allain.legacy@windriver.com>]

From: Matt Peters <matt.peters@windriver.com>

When an mbuf alloc fails during the mempool get operation for the
i40e bulk alloc receive function, the rx_mbuf_alloc_failed counter
is not incremented to record the error.

This fix ensures consistency with the other i40e receive procedures and
other net drivers.

Signed-off-by: Matt Peters <matt.peters@windriver.com>
Signed-off-by: Allain Legacy <allain.legacy@windriver.com>
---
 drivers/net/i40e/i40e_rxtx.c | 27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
index e5471b143..4131902a9 100644
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -610,6 +610,7 @@ static inline uint16_t
 rx_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 {
 	struct i40e_rx_queue *rxq = (struct i40e_rx_queue *)rx_queue;
+	struct rte_eth_dev *dev;
 	uint16_t nb_rx = 0;
 
 	if (!nb_pkts)
@@ -630,6 +631,11 @@ rx_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 			PMD_RX_LOG(DEBUG, "Rx mbuf alloc failed for "
 				   "port_id=%u, queue_id=%u",
 				   rxq->port_id, rxq->queue_id);
+
+			dev = &rte_eth_devices[rxq->port_id];
+			dev->data->rx_mbuf_alloc_failed +=
+				rxq->rx_free_thresh;
+
 			rxq->rx_nb_avail = 0;
 			rxq->rx_tail = (uint16_t)(rxq->rx_tail - nb_rx);
 			for (i = 0, j = rxq->rx_tail; i < nb_rx; i++, j++)
@@ -691,6 +697,7 @@ i40e_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 	union i40e_rx_desc rxd;
 	struct i40e_rx_entry *sw_ring;
 	struct i40e_rx_entry *rxe;
+	struct rte_eth_dev *dev;
 	struct rte_mbuf *rxm;
 	struct rte_mbuf *nmb;
 	uint16_t nb_rx;
@@ -721,10 +728,16 @@ i40e_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 			break;
 
 		nmb = rte_mbuf_raw_alloc(rxq->mp);
-		if (unlikely(!nmb))
+		if (unlikely(!nmb)) {
+			PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u "
+				   "queue_id=%u", (unsigned int)rxq->port_id,
+				   (unsigned int)rxq->queue_id);
+			dev = &rte_eth_devices[rxq->port_id];
+			dev->data->rx_mbuf_alloc_failed++;
 			break;
-		rxd = *rxdp;
+		}
 
+		rxd = *rxdp;
 		nb_hold++;
 		rxe = &sw_ring[rx_id];
 		rx_id++;
@@ -816,6 +829,7 @@ i40e_recv_scattered_pkts(void *rx_queue,
 	struct rte_mbuf *nmb, *rxm;
 	uint16_t rx_id = rxq->rx_tail;
 	uint16_t nb_rx = 0, nb_hold = 0, rx_packet_len;
+	struct rte_eth_dev *dev;
 	uint32_t rx_status;
 	uint64_t qword1;
 	uint64_t dma_addr;
@@ -833,8 +847,15 @@ i40e_recv_scattered_pkts(void *rx_queue,
 			break;
 
 		nmb = rte_mbuf_raw_alloc(rxq->mp);
-		if (unlikely(!nmb))
+		if (unlikely(!nmb)) {
+			PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u "
+				   "queue_id=%u", (unsigned int)rxq->port_id,
+				   (unsigned int)rxq->queue_id);
+			dev = &rte_eth_devices[rxq->port_id];
+			dev->data->rx_mbuf_alloc_failed++;
 			break;
+		}
+
 		rxd = *rxdp;
 		nb_hold++;
 		rxe = &sw_ring[rx_id];
-- 
2.12.1