| From 9cbfea02c1dbee0afb9128f065e6e793672b9ff7 Mon Sep 17 00:00:00 2001 |
| From: Sieng Piaw Liew <liew.s.piaw@gmail.com> |
| Date: Wed, 6 Jan 2021 22:42:02 +0800 |
| Subject: [PATCH 1/7] bcm63xx_enet: batch process rx path |
| |
| Use netif_receive_skb_list to batch process rx skb. |
| Tested on BCM6328 320 MHz using iperf3 -M 512, increasing performance |
| by 12.5%. |
| |
| 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 136 MBytes 37.9 Mbits/sec 203 sender |
| [ 4] 0.00-30.00 sec 135 MBytes 37.7 Mbits/sec receiver |
| |
| Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com> |
| Acked-by: Florian Fainelli <f.fainelli@gmail.com> |
| Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
| --- |
| drivers/net/ethernet/broadcom/bcm63xx_enet.c | 6 +++++- |
| 1 file changed, 5 insertions(+), 1 deletion(-) |
| |
| --- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c |
| +++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c |
| @@ -298,10 +298,12 @@ static void bcm_enet_refill_rx_timer(str |
| static int bcm_enet_receive_queue(struct net_device *dev, int budget) |
| { |
| struct bcm_enet_priv *priv; |
| + struct list_head rx_list; |
| struct device *kdev; |
| int processed; |
| |
| priv = netdev_priv(dev); |
| + INIT_LIST_HEAD(&rx_list); |
| kdev = &priv->pdev->dev; |
| processed = 0; |
| |
| @@ -392,10 +394,12 @@ static int bcm_enet_receive_queue(struct |
| skb->protocol = eth_type_trans(skb, dev); |
| dev->stats.rx_packets++; |
| dev->stats.rx_bytes += len; |
| - netif_receive_skb(skb); |
| + list_add_tail(&skb->list, &rx_list); |
| |
| } while (--budget > 0); |
| |
| + netif_receive_skb_list(&rx_list); |
| + |
| if (processed || !priv->rx_desc_count) { |
| bcm_enet_refill_rx(dev); |
| |