From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Sieng Piaw Liew Date: Mon, 30 Nov 2020 11:07:47 +0800 Subject: [PATCH] bcm63xx: enetsw: switch to netdev_alloc_skb_ip_align Increases packet processing performance by 30%. Tested on BCM6328 320 MHz and iperf3 -M 512 for 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: [ ID] Interval Transfer Bandwidth Retr [ 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 | 6 +++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c +++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c @@ -239,7 +239,10 @@ static int bcm_enet_refill_rx(struct net 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;