diff options
| author | Tariq Toukan <tariqt@mellanox.com> | 2017-06-15 14:35:36 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-06-15 22:53:23 -0400 |
| commit | 36ea7964982f54370e051386b74df914c53e2219 (patch) | |
| tree | b2a43f7e191c5b09128c78ecebbb221d54259fd8 /drivers/net/ethernet/mellanox/mlx4/en_rx.c | |
| parent | f28186d6b55d4c0b315d025753c22927e836a0e2 (diff) | |
| download | linux-36ea7964982f54370e051386b74df914c53e2219.tar.gz | |
net/mlx4_en: Improve XDP xmit function
Several performance improvements in XDP TX datapath,
including:
- Ring a single doorbell for XDP TX ring per NAPI budget,
instead of doing it per a lower threshold (was 8).
This includes removing the flow of immediate doorbell ringing
in case of a full TX ring.
- Compiler branch predictor hints.
- Calculate values in compile time rather than in runtime.
Performance tests:
Tested on ConnectX3Pro, Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz
Single queue no-RSS optimization ON.
XDP_TX packet rate:
-------------------------------------
| Before | After | Gain |
IPv4 | 10.3 Mpps | 12.0 Mpps | 17% |
IPv6 | 10.3 Mpps | 12.0 Mpps | 17% |
-------------------------------------
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>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/en_rx.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/en_rx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c index 507c48ef2674..747e4d7d7693 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c @@ -643,7 +643,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud struct mlx4_en_rx_ring *ring; struct bpf_prog *xdp_prog; int cq_ring = cq->ring; - int doorbell_pending; + bool doorbell_pending; struct mlx4_cqe *cqe; int polled = 0; int index; |