net/mlx4_en: Ignore budget on TX napi polling

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It is recommended that TX work not count against the quota.
The cost of TX packet liberation is a minute percentage of what it costs to
process an RX frame. Furthermore, that SKB freeing makes memory available for
other paths in the stack.

Give the TX a larger budget and be more aggressive about cleaning up the Tx
descriptors this budget could be changed using ethtool:
$ ethtool -C eth1 tx-frames-irq <budget>

Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Amir Vadai 2014-07-08 11:28:12 +03:00 • committed by David S. Miller

parent 0b03024491

commit fbc6daf197

4 changed files with 24 additions and 15 deletions

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7

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

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1

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

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28

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

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3

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

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