On Tue, 3 Dec 2024 12:41:53 +0100 Ales Musil <[email protected]> wrote:
> On Tue, Dec 3, 2024 at 12:30 PM Flavio Leitner <[email protected]> > wrote: > > > On Tue, 3 Dec 2024 08:13:35 +0100 > > Ales Musil <[email protected]> wrote: > > > > > On Mon, Dec 2, 2024 at 8:37 PM Ilya Maximets <[email protected]> > > > wrote: > > > > > > > On 11/22/24 09:40, Ales Musil wrote: > > > > > Increase the recirculaton limit to 12 as OVN wants to adopt > > > > > strategy which might lead to more recirculations in the > > > > > logical router pipeline. > > > > > > > > Hi, Ales. > > > > > > > > > Hi Ilya, > > > > > > > > > > Could you, please, explain the scenario in more details > > > > where so many recirculations are needed? Also, do you expect > > > > all the traffic to have increased number of them or is it just > > > > for very specific control traffic? > > > > > > > > > > The need for more recirculations comes from the commit > > > all patch for OVN. Unfortunately almost all traffic will be > > > going through more recirculations, not necessarily 12. > > > > > > Could you please point me to the patch? > > > > > It's > https://mail.openvswitch.org/pipermail/ovs-dev/2024-November/418506.html. > > > > > > > > Asking because 12 is a lot. Every re-circulation means packet > > > > re-classification and potential re-parsing, so it will have a > > > > huge performance impact. > > > > > > > > And it doesn't only ally to the userspace datapath, while kernel > > > > might endure so many recirculations in some scenarios, > > > > performance will still be awful. > > > > > > > > > > I'm aware of the potential performance impact, Han is testing > > > whether we have any performance impact and if it's acceptable. > > > If not we will have to come up with different strategy how to fix > > > a few bugs in OVN. > > > > > > Doesn't that increase the stack usage as well? > > > > > I'm not sure if I know the answer to that. Aaron, maybe you know the answer to that? What was the platform that stack usage was a problem? Thanks, fbl _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
