r8125 driver for 2.5Gbit cards
Hi, I'm wondering if it's possible to include the r8125 realtek driver for 2.5Gbit/s realtek 8125B chips with the official images. The in-tree kernel driver r8169 is pretty bad for these cards. It is supported, it works, but the throughput with r8169 driver is nowhere near the throughput of r8125 driver. I'm personally getting 1.1 Gbit/s tops with IOCREST dual 2.5 gbit adapter, while I was getting at least 2.1 with r8125 with proxmox on the same system. Unfortunately it is not that simple to com
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The performance difference at 2.5Gbps may be caused by the fact that r8169 doesn't support RSS. All load is on one CPU. Background is that Realtek doesn't provide any data sheets.
You may be able to improve the performance by using packet coalescing at GRO level by using the following settings.
You can play with the values. Feedback whether this improves the performance would be appreciated.
echo 20000 > /sys/class/net/<if>/gro_flush_timeout
echo 10 > /sys/cla
