[ovs-discuss] OVS performance with Kernel Datapath of Linux upstream vs Linux OVS tree.

[Kapil Adhikesavalu]

Hi,

Is there any performance difference with using the OVS kernel Datapath
available part of Linux upstream Vs the module built from Linux OVS tree.

So far i have been using the DP part of the Linux upstream and as NAT
feature requires Linux version 4.6, i plan to switch to DP module built
from OVS tree.

1. In general is there any performance between using these two ? or would
it vary based on the features being in use.
2. I am currently using VXLAN and L2 forwarding + NAT(plan to use it),
would like to know if there could be any performance difference expected
when i switch from upstream DP to KLM.

I didn't any specific mention about performance in FAQ -
http://docs.openvswitch.org/en/latest/faq/releases/ expect for this
statement 'Certain features require kernel support to function or to have
reasonable performance.'

Regards
Kapil.
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