linux_dsm_epyc7002/drivers/net/ethernet/mellanox
Saeed Mahameed 35b510e257 net/mlx5e: XDP TX xmit more
Previously we rang XDP SQ doorbell on every forwarded XDP packet.

Here we introduce a xmit more like mechanism that will queue up more
than one packet into SQ (up to RX napi budget) w/o notifying the hardware.

Once RX napi budget is consumed and we exit napi RX loop, we will
flush (doorbell) all XDP looped packets in case there are such.

XDP forward packet rate:

Comparing XDP with and w/o xmit more (bulk transmit):

RX Cores    XDP TX       XDP TX (xmit more)
---------------------------------------------------
1           6.5Mpps      12.4Mpps
2          13.2Mpps      24.2Mpps
4          25.2Mpps      36.3Mpps*
8          36.3Mpps*     36.3Mpps*

*My xmitter was limited to 36.3Mpps, so it is the bottleneck.
It seems that receive side can handle more.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-22 02:51:41 -04:00
..
mlx4 ptp_clock: future-proofing drivers against PTP subsystem becoming optional 2016-09-22 02:18:33 -04:00
mlx5/core net/mlx5e: XDP TX xmit more 2016-09-22 02:51:41 -04:00
mlxsw mlxsw: spectrum: Implement max rif resource 2016-09-21 01:00:59 -04:00
Kconfig mlxsw: Introduce Mellanox switch driver core 2015-07-30 00:04:59 -07:00
Makefile mlxsw: Introduce Mellanox switch driver core 2015-07-30 00:04:59 -07:00