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f323dec4f8
Runtime-tested on Comtrend AR-5387un. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
46 lines
1.6 KiB
Diff
46 lines
1.6 KiB
Diff
From c4a207865e7ea310dc146ff4aa1b0aa0c78d3fe1 Mon Sep 17 00:00:00 2001
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From: Sieng Piaw Liew <liew.s.piaw@gmail.com>
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Date: Wed, 6 Jan 2021 22:42:05 +0800
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Subject: [PATCH 4/7] bcm63xx_enet: alloc rx skb with NET_IP_ALIGN
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Use netdev_alloc_skb_ip_align on newer SoCs with integrated switch
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(enetsw) when refilling RX. Increases packet processing performance
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by 30% (with netif_receive_skb_list).
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Non-enetsw SoCs cannot function with the extra pad so continue to use
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the regular netdev_alloc_skb.
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Tested on BCM6328 320 MHz and iperf3 -M 512 to measure packet/sec
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performance.
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Before:
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[ ID] Interval Transfer Bandwidth Retr
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[ 4] 0.00-30.00 sec 120 MBytes 33.7 Mbits/sec 277 sender
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[ 4] 0.00-30.00 sec 120 MBytes 33.5 Mbits/sec receiver
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After (+netif_receive_skb_list):
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[ 4] 0.00-30.00 sec 155 MBytes 43.3 Mbits/sec 354 sender
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[ 4] 0.00-30.00 sec 154 MBytes 43.1 Mbits/sec receiver
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Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com>
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Acked-by: Florian Fainelli <f.fainelli@gmail.com>
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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---
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drivers/net/ethernet/broadcom/bcm63xx_enet.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
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+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
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@@ -237,7 +237,10 @@ static int bcm_enet_refill_rx(struct net
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desc = &priv->rx_desc_cpu[desc_idx];
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if (!priv->rx_skb[desc_idx]) {
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- skb = netdev_alloc_skb(dev, priv->rx_skb_size);
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+ if (priv->enet_is_sw)
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+ skb = netdev_alloc_skb_ip_align(dev, priv->rx_skb_size);
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+ else
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+ skb = netdev_alloc_skb(dev, priv->rx_skb_size);
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if (!skb)
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break;
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priv->rx_skb[desc_idx] = skb;
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