From 74ec605a11b7ecf68036c3f086f684bbe7381353 Mon Sep 17 00:00:00 2001 From: Heiner Kallweit Date: Wed, 30 Nov 2022 23:30:15 +0100 Subject: [PATCH 4/4] r8169: enable GRO software interrupt coalescing per default There are reports about r8169 not reaching full line speed on certain systems (e.g. SBC's) with a 2.5Gbps link. There was a time when hardware interrupt coalescing was enabled per default, but this was changed due to ASPM-related issues on few systems. So let's use software interrupt coalescing instead and enable it using new function netdev_sw_irq_coalesce_default_on(). Even with these conservative settings interrupt load on my 1Gbps test system reduced significantly. Signed-off-by: Heiner Kallweit Signed-off-by: David S. Miller --- drivers/net/ethernet/realtek/r8169_main.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/net/ethernet/realtek/r8169_main.c +++ b/drivers/net/ethernet/realtek/r8169_main.c @@ -5283,6 +5283,8 @@ static int rtl_init_one(struct pci_dev * dev->hw_features |= NETIF_F_RXALL; dev->hw_features |= NETIF_F_RXFCS; + netdev_sw_irq_coalesce_default_on(dev); + /* configure chip for default features */ rtl8169_set_features(dev, dev->features);