[ovs-discuss] upgrade ovs kernel module from 2.9 to 2.10, the performance decrease

Ben Pfaff blp at ovn.org
Mon Sep 23 22:33:00 UTC 2019

On Mon, Sep 16, 2019 at 07:51:08PM +0800, djliu wrote:
> When I upgrade ovs kernel module from 2.9.0 to 2.10.0, then use iperf3 send
> packets from a vpc vm to a vlan vm, the bandwidth decrease from 3Gbits/sec
> download to 1Gbits/sec. I 
> reset the commit to the first commit of erspan, then the bandwidth will
> normal. Also, when the ovs module is 2.9.0, I can capture packet in
> geneve_sys_6081 port use tcpdump . When upgrade to 2.10.0, 
> the tcpdump can't capture any packet in the port. Does anyone know why.

This is a bit surprising.  Greg, do you have any thoughts about
potential reasons why the new kernel module would be significantly

More information about the discuss mailing list