From fbc6daf19745b372c0d909e5d74ab02e42b70e51 Mon Sep 17 00:00:00 2001 From: Amir Vadai Date: Tue, 8 Jul 2014 11:28:12 +0300 Subject: net/mlx4_en: Ignore budget on TX napi polling 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 Signed-off-by: Amir Vadai Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/net/ethernet/mellanox/mlx4/mlx4_en.h') diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h index 624e1939e9ee..d72a5a894fc6 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h @@ -126,6 +126,8 @@ enum { #define MAX_TX_RINGS (MLX4_EN_MAX_TX_RING_P_UP * \ MLX4_EN_NUM_UP) +#define MLX4_EN_DEFAULT_TX_WORK 256 + /* Target number of packets to coalesce with interrupt moderation */ #define MLX4_EN_RX_COAL_TARGET 44 #define MLX4_EN_RX_COAL_TIME 0x10 @@ -543,6 +545,7 @@ struct mlx4_en_priv { __be32 ctrl_flags; u32 flags; u8 num_tx_rings_p_up; + u32 tx_work_limit; u32 tx_ring_num; u32 rx_ring_num; u32 rx_skb_size; -- cgit v1.2.3