netdev - [PATCH net-next V1 11/11] net/mlx5e: Prefetch skb data on RX

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Date:	Tue, 23 Jun 2015 17:14:22 +0300
From:	Or Gerlitz <ogerlitz@...lanox.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, Amir Vadai <amirv@...lanox.com>,
	Tal Alon <talal@...lanox.com>,
	Achiad Shochat <achiad@...lanox.com>,
	Saeed Mahameed <saeedm@...lanox.com>,
	Or Gerlitz <ogerlitz@...lanox.com>
Subject: [PATCH net-next V1 11/11] net/mlx5e: Prefetch skb data on RX

From: Saeed Mahameed <saeedm@...lanox.com>

Prefetch the 1st cache line used by the buffer pointed by
the skb linear data.

Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index 760b3ef..9a93741 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -215,6 +215,7 @@ bool mlx5e_poll_rx_cq(struct mlx5e_cq *cq, int budget)
 		wqe_counter    = be16_to_cpu(wqe_counter_be);
 		wqe            = mlx5_wq_ll_get_wqe(&rq->wq, wqe_counter);
 		skb            = rq->skb[wqe_counter];
+		prefetch(skb->data);
 		rq->skb[wqe_counter] = NULL;
 
 		dma_unmap_single(rq->pdev,
-- 
2.3.7

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