net/mlx4_en: Saving mem access on data path

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Localized the pdev->dev, and using dma_map instead of pci_map
There are multiple map/unmap operations on data path,
optimizing those by saving redundant pointer access.
Those places were identified as hot-spots when running kernel profiling
during some benchmarks.
The fixes had most impact when testing packet rate with small packets,
reducing several % from CPU load, and in some case being the difference
between reaching wire speed or being CPU bound.

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Yevgeny Petrilin 2012-03-06 04:03:34 +00:00 • committed by David S. Miller

parent 6975f4ce5a

commit ebf8c9aa03

4 changed files with 13 additions and 16 deletions

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1

drivers/net/ethernet/mellanox/mlx4/en_netdev.c

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14

drivers/net/ethernet/mellanox/mlx4/en_rx.c

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13

drivers/net/ethernet/mellanox/mlx4/en_tx.c

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1

drivers/net/ethernet/mellanox/mlx4/mlx4_en.h

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