[ovs-discuss] OpenStack profiling with networking-ovn - port creation is slow

[Han Zhou]

Hi Daniel,

Thanks for the detailed profiling!

On Fri, Feb 16, 2018 at 6:50 AM, Daniel Alvarez Sanchez <dalvarez at redhat.com>
wrote:
>
> About the duplicated processing of the update2 messages, I've verified
that those are not always present. I've isolated the scenario further and
did tcpdump and debugging on the exact process which is sending
the'transact' command and I see no update2 processing duplicates. Among the
rest of the workers, one of them is always getting them duplicated while
the rest don't I don't know why.
> However, the 'modify' in the LS table for updating the acls set is the
one always taking 2-3 seconds on this load.
>
I think this explains why the time spent grows linearly with number of
lports. Each lport has its own ACLs added to same LS, so the acl column in
the row gets bigger and bigger. It is likely that the port group
optimization would solve this problem.

Thanks
Han
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