[ovs-discuss] Flow synchronizing between user space to kernel space

Naveen M 77naveen77 at gmail.com
Wed Nov 16 14:21:36 UTC 2016


Hi Joe,

Thanks for your quick response its really helpful for us.

Synchronization between user space and kernel space, based on UFID only
kernel updating the statistics to userspace right?
If yes, user space also having same UFID for each flow right?


*With Warm Regards,*
*Naveen M*


On Wed, Nov 16, 2016 at 2:21 AM, Joe Stringer <joe at ovn.org> wrote:

> On 14 November 2016 at 23:35, Naveen M <77naveen77 at gmail.com> wrote:
> > Hi all,
> >
> > I'm newbie to openvswitch. Currently i'm walk-throwing the
> > openvswitch(2.5.0) code about flow synchronization between userspace to
> > kernelspace.
> >
> > I have few doubts on synchronization mechanism. In user space revalidator
> > thread is maintaining the synchronization.
> >
> > 1.Is this must for UFID in every flow?
>
> UFID stands for Unique Flow IDentifier. Each datapath flow has one.
>
> > 2.While inserting the flow i didn't found anywhere where the UFID is
> > created. May i know where its created?
>
> It's generated using dpif_flow_hash().
>
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