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r8169: enable GRO software interrupt coalescing per default

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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 <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2022-11-30 23:30:15 +01:00 committed by David S. Miller
parent d93607082e
commit 42f66a44d8
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/realtek/r8169_main.c
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@ -5283,6 +5283,8 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
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);