From: Rafał Miłecki <ra...@milecki.pl> This improves NAT masquarade network performance.
An alternative to kernel change would be runtime setup but that requires ethtool and identifying relevant network interface and all related switch ports interfaces. Signed-off-by: Rafał Miłecki <ra...@milecki.pl> --- .../600-net-disable-GRO-support.patch | 46 +++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 target/linux/bcm53xx/patches-5.10/600-net-disable-GRO-support.patch diff --git a/target/linux/bcm53xx/patches-5.10/600-net-disable-GRO-support.patch b/target/linux/bcm53xx/patches-5.10/600-net-disable-GRO-support.patch new file mode 100644 index 0000000000..1024aec7e1 --- /dev/null +++ b/target/linux/bcm53xx/patches-5.10/600-net-disable-GRO-support.patch @@ -0,0 +1,46 @@ +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <ra...@milecki.pl> +Date: Fri, 10 Jun 2022 15:08:33 +0200 +Subject: [PATCH] net: disable GRO support +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +In many cases GRO improves network performance however it comes at a +cost of chacksums calculations. In case of slow CPU and missing hardware +csum calculation support GRO can actually decrease network speed. + +On BCM4708 *disabling* GRO results in following NAT masquarade speed +changes: +1. 364 Mb/s → 396 Mb/s (packet steering disabled) +2. 341 Mb/s → 566 Mb/s (packet steering enabled) + +Signed-off-by: Rafał Miłecki <ra...@milecki.pl> +--- + net/8021q/vlan_core.c | 2 ++ + net/ipv4/af_inet.c | 2 ++ + 2 files changed, 4 insertions(+) + +--- a/net/8021q/vlan_core.c ++++ b/net/8021q/vlan_core.c +@@ -544,6 +544,8 @@ static int __init vlan_offload_init(void) + { + unsigned int i; + ++ return -ENOTSUPP; ++ + for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++) + dev_add_offload(&vlan_packet_offloads[i]); + +diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c +index 8267349..6194a14 100644 +--- a/net/ipv4/af_inet.c ++++ b/net/ipv4/af_inet.c +@@ -1913,6 +1913,8 @@ static int __init ipip_offload_init(void) + + static int __init ipv4_offload_init(void) + { ++ return -ENOTSUPP; ++ + /* + * Add offloads + */ -- 2.34.1 _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel