diff options
| author | Tariq Toukan | 2016-06-23 16:02:40 +0200 |
|---|---|---|
| committer | David S. Miller | 2016-06-27 10:10:41 +0200 |
| commit | 9908aa292971ee3320ea13a71d75f90a52929892 (patch) | |
| tree | 887b74a8d4c93747f8542ef45e3880dfcc21b048 /drivers/net/ethernet/mellanox/mlx5/core/en.h | |
| parent | net/mlx5e: Introduce net device priv flags infrastructure (diff) | |
| download | kernel-qcow2-linux-9908aa292971ee3320ea13a71d75f90a52929892.tar.gz kernel-qcow2-linux-9908aa292971ee3320ea13a71d75f90a52929892.tar.xz kernel-qcow2-linux-9908aa292971ee3320ea13a71d75f90a52929892.zip | |
net/mlx5e: CQE based moderation
In this mode the moderation timer will restart upon
new completion (CQE) generation rather than upon interrupt
generation.
The outcome is that for bursty traffic the period timer will never
expire and thus only the moderation frames counter will dictate
interrupt generation, thus the interrupt rate will be relative
to the incoming packets size.
If the burst seizes for "moderation period" time then an interrupt
will be issued immediately.
CQE based moderation is off by default and can be controlled
via ethtool set_priv_flags.
Performance tested on ConnectX4-Lx 50G.
Less packet loss in netperf UDP and TCP tests, with no bw degradation,
for both single and multi streams, with message sizes of
64, 1024, 1472 and 32768 byte.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Achiad Shochat <achiad@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Gal Pressman <galp@mellanox.com>
Signed-off-by: Gil Rockah <gilr@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en.h')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en.h | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h index 02fa4daef59d..36f625d3c736 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h @@ -79,6 +79,7 @@ #define MLX5E_PARAMS_DEFAULT_LRO_WQE_SZ (64 * 1024) #define MLX5E_PARAMS_DEFAULT_RX_CQ_MODERATION_USEC 0x10 +#define MLX5E_PARAMS_DEFAULT_RX_CQ_MODERATION_USEC_FROM_CQE 0x3 #define MLX5E_PARAMS_DEFAULT_RX_CQ_MODERATION_PKTS 0x20 #define MLX5E_PARAMS_DEFAULT_TX_CQ_MODERATION_USEC 0x10 #define MLX5E_PARAMS_DEFAULT_TX_CQ_MODERATION_PKTS 0x20 @@ -145,11 +146,11 @@ struct mlx5e_umr_wqe { }; static const char mlx5e_priv_flags[][ETH_GSTRING_LEN] = { - "nop", + "rx_cqe_moder", }; enum mlx5e_priv_flag { - MLX5E_PFLAG_NOP = (1 << 0), + MLX5E_PFLAG_RX_CQE_BASED_MODER = (1 << 0), }; #define MLX5E_SET_PRIV_FLAG(priv, pflag, enable) \ @@ -165,6 +166,11 @@ enum mlx5e_priv_flag { #define MLX5E_MIN_BW_ALLOC 1 /* Min percentage of BW allocation */ #endif +struct mlx5e_cq_moder { + u16 usec; + u16 pkts; +}; + struct mlx5e_params { u8 log_sq_size; u8 rq_wq_type; @@ -173,12 +179,11 @@ struct mlx5e_params { u8 log_rq_size; u16 num_channels; u8 num_tc; + u8 rx_cq_period_mode; bool rx_cqe_compress_admin; bool rx_cqe_compress; - u16 rx_cq_moderation_usec; - u16 rx_cq_moderation_pkts; - u16 tx_cq_moderation_usec; - u16 tx_cq_moderation_pkts; + struct mlx5e_cq_moder rx_cq_moderation; + struct mlx5e_cq_moder tx_cq_moderation; u16 min_rx_wqes; bool lro_en; u32 lro_wqe_sz; @@ -667,6 +672,9 @@ void mlx5e_build_default_indir_rqt(struct mlx5_core_dev *mdev, int num_channels); int mlx5e_get_max_linkspeed(struct mlx5_core_dev *mdev, u32 *speed); +void mlx5e_set_rx_cq_mode_params(struct mlx5e_params *params, + u8 cq_period_mode); + static inline void mlx5e_tx_notify_hw(struct mlx5e_sq *sq, struct mlx5_wqe_ctrl_seg *ctrl, int bf_sz) { |