| Message ID | 20201204054616.26876-3-liew.s.piaw@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [net-next] bcm63xx_enet: alloc rx skb with NET_IP_ALIGN | expand |
On 12/3/2020 9:46 PM, Sieng Piaw Liew wrote: > Use netdev_alloc_skb_ip_align on newer SoCs with integrated switch > (enetsw) when refilling RX. 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 <liew.s.piaw@gmail.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com>
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c index c1eba5fa3258..92bff4758216 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;
Use netdev_alloc_skb_ip_align on newer SoCs with integrated switch (enetsw) when refilling RX. 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 <liew.s.piaw@gmail.com> --- drivers/net/ethernet/broadcom/bcm63xx_enet.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)