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net/mlx4_en: use __netdev_tx_sent_queue() 

doorbell only depends on xmit_more and netif_tx_queue_stopped()

Using __netdev_tx_sent_queue() avoids messing with BQL stop flag,
and is more generic.

This patch increases performance on GSO workload by keeping
doorbells to the minimum required.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2018-10-31 08:39:14 -07:00 committed by David S. Miller
parent fe60faa506
commit c297344435
1 changed files with 4 additions and 2 deletions
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6
drivers/net/ethernet/mellanox/mlx4/en_tx.c
View File

@ -1006,7 +1006,6 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
ring->packets++;
}
ring->bytes += tx_info->nr_bytes;
netdev_tx_sent_queue(ring->tx_queue, tx_info->nr_bytes);
AVG_PERF_COUNTER(priv->pstats.tx_pktsz_avg, skb->len);
if (tx_info->inl)
@ -1044,7 +1043,10 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
netif_tx_stop_queue(ring->tx_queue);
ring->queue_stopped++;
}
send_doorbell = !skb->xmit_more || netif_xmit_stopped(ring->tx_queue);
send_doorbell = __netdev_tx_sent_queue(ring->tx_queue,
tx_info->nr_bytes,
skb->xmit_more);
real_size = (real_size / 16) & 0x3f;