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H A D | bcm63xx_enet.c | c4a20786 Wed Jan 06 08:42:05 CST 2021 Sieng Piaw Liew <liew.s.piaw@gmail.com> bcm63xx_enet: alloc rx skb with NET_IP_ALIGN
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> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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