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

[Kapil Adhikesavalu]

Hi Jarno,

That's great! Thanks for the clarification. So, if anything it should only
improve the performance when I move to OVS tree kernel module.

On Thu, 13 Apr 2017, 1:05 AM Jarno Rajahalme, <jarno at ovn.org> wrote:

>
> > On Apr 12, 2017, at 12:49 AM, Kapil Adhikesavalu <kapil20084 at gmail.com>
> wrote:
> >
> > 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.
> >
>
> OVS tree kernel module has an Exact Match Cache, which generally improves
> performance. Upstream linux openvswitch module does not have it.
>
> > 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.’
> >
>
> This note relates to using OVS with an older (upstream) kernel module.
> While we maintain backwards compatibility, newer features perform better
> with newer kernel module having explicit support for the feature.
>
>   Jarno
>
> > Regards
> > Kapil.
> > _______________________________________________
> > dev mailing list
> > dev at openvswitch.org
> > https://mail.openvswitch.org/mailman/listinfo/ovs-dev
>
> --

Regards
Kapil
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.openvswitch.org/pipermail/ovs-discuss/attachments/20170413/49cc3774/attachment.html>