networking-calico core plugin security group rule updates are slow

[Doug Wiegley]

The core plugin is currently using the "emulated" bulk handlers, but the default native handlers will also work. Native support is on by default in ML2, but not inherited. Potential fix is https://review.openstack.org/#/c/628063

Neutron has some legacy "bulk api" handlers that are just a for loop around single actions. There are also a bunch of default "native" bulk handlers that are much better. The default native bulk handlers are *not* enabled by default, and *not* enabled by inheritance, for legacy reasons.

The change above flips on the native bulk api default handlers.

To repro this issue, make a security group, then make a bulk api call to add 50 rules. Then 50 more. And repeat. Note that for every 50, it gets a *lot* slower, linearly.

With this change, it still gets slower linearly, but I think that's a side effect of all the get/intialization foo that that the ovo objects are incurring (which is a bug in the bulk handlers for security groups, IMO.)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/628063
Committed: https://git.openstack.org/cgit/openstack/networking-calico/commit/?id=8b315a138c06e5ac13bb67298f1bb832a151fc26
Submitter: Zuul
Branch: master

commit 8b315a138c06e5ac13bb67298f1bb832a151fc26
Author: Doug Wiegley <email address hidden>
Date: Wed Jan 2 15:50:28 2019 -0700

    Enable native handlers for neutron API operations

    Since this plugin inherits from the ml2 plugin, make use of
    the native bulk, paging, and sorting handlers.

    Closes-bug: 1810350
    Change-Id: Id2deeea9b6722f8282b0f5fe478b4470e76c675e