[ovs-dev] Question Regarding ovs_packet_cmd_execute in Kernel Datapath

[Ben Pfaff]

On Thu, Feb 06, 2020 at 01:32:12PM -0800, Pravin Shelar wrote:
> On Thu, Feb 6, 2020 at 12:18 PM Ben Pfaff <blp at ovn.org> wrote:
> >
> > On Thu, Feb 06, 2020 at 11:36:19AM -0800, Pravin Shelar wrote:
> > > Another option would be to add new command that install and execute
> > > packet in same netlink msg. That would save us a netlink msg to handle
> > > a miss-call.  what do you think about it?
> >
> > When I experimented with that in the past, I found that it didn't have a
> > noticeable impact on performance.
> >
> Reduced number of msgs sent here would help in certain situations. 

That is plausible, but it didn't help when I measured it previously.

> It is also simpler to fix the stats issue using this approach.

There's no stats issue.  Userspace just counts the number of packets it
sent and adds them in.