diff options
| author |   Tariq Toukan <tariqt@mellanox.com> | 2018-05-16 10:46:57 +0300 |
|---|---|---|
| committer |   Saeed Mahameed <saeedm@mellanox.com> | 2018-07-26 15:23:57 -0700 |
| commit | d3398a4f1887eee46c22b37f6245faa6c51b130b (patch) | |
| tree | 288bf28a2ace1c85791d1a2fe380be974f315190 /drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | |
| parent | net/mlx5e: Add support for XDP_REDIRECT in device-out side (diff) | |
| download | wireguard-linux-d3398a4f1887eee46c22b37f6245faa6c51b130b.tar.xz wireguard-linux-d3398a4f1887eee46c22b37f6245faa6c51b130b.zip | |
net/mlx5e: RX, Prefetch the xdp_frame data area
A loaded XDP program might write to the xdp_frame data area,
prefetchw() it to avoid a potential cache miss.
Performance tests:
ConnectX-5, XDP_TX packet rate, single ring.
CPU: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz
Before: 13,172,976 pps
After: 13,456,248 pps
2% gain.
Fixes: 22f453988194 ("net/mlx5e: Support XDP over Striding RQ")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en_rx.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index e33ca03b2100..15d8ae28c040 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -1099,6 +1099,7 @@ mlx5e_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi, dma_sync_single_range_for_cpu(rq->pdev, di->addr, head_offset, frag_size, DMA_FROM_DEVICE); + prefetchw(va); /* xdp_frame data area */ prefetch(data); rcu_read_lock(); |