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Increases packet processing performance by 30% (with netif_receive_skb_list). Non-enetsw SoCs cannot function with the extra pad so continue to use the regular netdev_alloc_skb. Tested on BCM6328 320 MHz and iperf3 -M 512 to measure packet/sec performance. Before: [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-30.00 sec 120 MBytes 33.7 Mbits/sec 277 sender [ 4] 0.00-30.00 sec 120 MBytes 33.5 Mbits/sec receiver After (+netif_receive_skb_list): [ 4] 0.00-30.00 sec 155 MBytes 43.3 Mbits/sec 354 sender [ 4] 0.00-30.00 sec 154 MBytes 43.1 Mbits/sec receiver Signed-off-by: Sieng Piaw Liew --- drivers/net/ethernet/broadcom/bcm63xx_enet.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c index 21744dae30ce..96d56c3e2cc9 100644 --- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c +++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c @@ -237,7 +237,10 @@ static int bcm_enet_refill_rx(struct net_device *dev) desc = &priv->rx_desc_cpu[desc_idx]; if (!priv->rx_skb[desc_idx]) { - skb = netdev_alloc_skb(dev, priv->rx_skb_size); + if (priv->enet_is_sw) + skb = netdev_alloc_skb_ip_align(dev, priv->rx_skb_size); + else + skb = netdev_alloc_skb(dev, priv->rx_skb_size); if (!skb) break; priv->rx_skb[desc_idx] = skb; -- 2.17.1