From: Eric Kinzie <ehkinzie@gmail.com>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH 2/2] ixgbe: add memory barriers in vector rx/tx
Date: Thu, 25 Jun 2015 11:25:41 -0700 [thread overview]
Message-ID: <1435256741-25489-3-git-send-email-ehkinzie@gmail.com> (raw)
In-Reply-To: <1435256741-25489-1-git-send-email-ehkinzie@gmail.com>
Add write memory barrier before writing tail pointer.
Fixes c95584dc2b18 ("ixgbe: new vectorized functions for Rx/Tx")
Signed-off-by: Eric Kinzie <ehkinzie@gmail.com>
---
drivers/net/ixgbe/ixgbe_rxtx_vec.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ixgbe/ixgbe_rxtx_vec.c b/drivers/net/ixgbe/ixgbe_rxtx_vec.c
index abd10f6..b601de8 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx_vec.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx_vec.c
@@ -123,6 +123,7 @@ ixgbe_rxq_rearm(struct ixgbe_rx_queue *rxq)
(rxq->nb_rx_desc - 1) : (rxq->rxrearm_start - 1));
/* Update the tail pointer on the NIC */
+ rte_wmb();
IXGBE_PCI_REG_WRITE(rxq->rdt_reg_addr, rx_id);
}
@@ -645,6 +646,8 @@ ixgbe_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
txq->tx_tail = tx_id;
+ /* update tail pointer */
+ rte_wmb();
IXGBE_PCI_REG_WRITE(txq->tdt_reg_addr, txq->tx_tail);
return nb_pkts;
--
1.7.10.4
next prev parent reply other threads:[~2015-06-25 18:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-25 18:25 [dpdk-dev] [PATCH 0/2] ixgbe vector rx/tx changes Eric Kinzie
2015-06-25 18:25 ` [dpdk-dev] [PATCH 1/2] ixgbe: vector rx rearm after queue reset Eric Kinzie
2015-08-03 15:07 ` Thomas Monjalon
2015-06-25 18:25 ` Eric Kinzie [this message]
2015-06-29 11:28 ` [dpdk-dev] [PATCH 2/2] ixgbe: add memory barriers in vector rx/tx Ananyev, Konstantin
2015-08-03 15:08 ` Thomas Monjalon
2015-10-21 15:36 ` Thomas Monjalon
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