net/mlx4_en: Improve transmit CQ polling

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Several small performance improvements in TX CQ polling,
including:
- Compiler branch predictor hints.
- Minimize variables scope.
- More proper check of cq type.
- Use boolean instead of int for a binary indication.

Performance tests:
Tested on ConnectX3Pro, Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz

Packet-rate tests for both regular stack and XDP use cases:
No noticeable gain, no degradation.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Cc: kernel-team@fb.com
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

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Tariq Toukan 2017-06-15 14:35:34 +03:00 • committed by David S. Miller

parent 9bcee89ac4

commit cc26a49086

1 changed files with 7 additions and 6 deletions

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

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