Quelltext der Seite Proxmox Low performance with Intel NIC with heavy udp traffic

=Problem=
With kernel version 4.15 a fix in the e1000e driver has been introduced: https://github.com/torvalds/linux/commit/b10effb92e272051dd1ec0d7be56bf9ca85ab927

This fix slighly slows down DMA access times to prevent the NIC to hang up on heavy UDP traffic. This impacts the TCP performance.

=Workaround=

In order to regain full transfer speeds, you can turn off TCP segmentation offloading via the following command:

 ethtool -K <interface> tso off gso off

There is currently no fix available / announced that allows offloading TCP segmentation to the NIC without sacrificing performance.


The following error message can be ignored:

 Cannot get device udp-fragmentation-offload settings: Operation not supported


=Source=
*https://wiki.hetzner.de/index.php/Low_performance_with_Intel_i218/i219_NIC/en