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

[Kapil Adhikesavalu]

Thanks Jarno!

On Fri, 14 Apr 2017, 2:53 AM Jarno Rajahalme, <jarno at ovn.org> wrote:

> On Apr 12, 2017, at 9:00 PM, Kapil Adhikesavalu <kapil20084 at gmail.com>
> wrote:
>
> 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.
>
>
> Yes, assuming you will be using a recent OVS release rather than an old
> one.
>
>   Jarno
>
> 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
>
>
> --

Regards
Kapil
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