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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
ammarfaizi2 · Dec 3, 2022 · 42f66a4 · 42f66a4
1 parent d936070
commit 42f66a4
Showing 1 changed file with 2 additions and 0 deletions.
diff --git 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 *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);