net/mlx5e: RX, Prefetch the xdp_frame data area

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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: 22f4539881 ("net/mlx5e: Support XDP over Striding RQ")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

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Tariq Toukan 2018-05-16 10:46:57 +03:00 • committed by Saeed Mahameed

parent 58b99ee3e3

commit d3398a4f18

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drivers/net/ethernet/mellanox/mlx5/core/en_rx.c

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