[Bug 1664764] Re: ARM OpenStack API/Dashboard calls are very slow

[Ryan Beisner]

I revisited this across three CPU architectures.  The machines in each
arch have vastly varying specs of CPU, mem and disk.  Regardless of that
difference, the difference in API and CLI response times is
insignificant in my opinion.

These are Xenial freshly-deployed hosts with the latest openstack-
client.


#### ppc64el
$ time openstack --help
  ...
real    0m13.902s
user    0m12.624s
sys     0m0.252s


$ time openstack image list
+--------------------------------------+----------------+--------+
| ID                                   | Name           | Status |
+--------------------------------------+----------------+--------+
| d24aeec2-2217-4e4b-8dc3-07d1b42a6896 | cirros-ppc64el | active |
| fff934c8-b0ac-407c-86e0-93a1b23675c3 | xenial-ppc64el | active |
+--------------------------------------+----------------+--------+

real    0m2.419s
user    0m1.620s
sys     0m0.152s


#### arm64
$ time openstack --help
  ...
real    0m11.808s
user    0m11.372s
sys     0m0.364s

$ time openstack image list
+--------------------------------------+-------------+--------+
| ID                                   | Name        | Status |
+--------------------------------------+-------------+--------+
| 83dfc5ac-6245-41eb-81da-0d465aa627fe | xenial-uefi | active |
+--------------------------------------+-------------+--------+

real    0m5.906s
user    0m1.264s
sys     0m0.212s


#### amd64
$ time openstack --help
  ...
real    0m9.484s
user    0m8.476s
sys     0m0.360s

$ time openstack image list
+--------------------------------------+---------+--------+
| ID                                   | Name    | Status |
+--------------------------------------+---------+--------+
| 06a073c7-5805-4ed2-b88b-f1c6a8f46210 | cirros  | active |
| a6e2aa91-e92f-4adc-9e00-237a16323feb | cirros2 | active |
| 4eafd638-5956-4192-8d06-564a57170ee3 | precise | active |
| df79259c-c668-4528-90f2-36bee4c96784 | trusty  | active |
| 20e4b0d2-a101-4186-97c9-51ffdff57b33 | xenial  | active |
+--------------------------------------+---------+--------+

real    0m3.491s
user    0m1.616s
sys     0m0.260s

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https://bugs.launchpad.net/bugs/1664764

Title:
  ARM OpenStack API/Dashboard calls are very slow

Status in horizon package in Ubuntu:
  Opinion

Bug description:
  dann frazier (dannf) on 2016-12-23 :

  I'm using openstack-base deployed on an arm64-only MAAS
  (xenial/newton). Both the CLI and dashboard are very slow to respond.
  CLI commands (e.g. nova list) take about 15s to complete. Logging into
  the dashboard takes more than 30s. 'top' shows plenty of available
  CPU/memory on the dashboard node.

  Note: This isn't new - it is something we've observed with previous
  versions of Ubuntu OpenStack as well, but haven't yet gotten to the
  bottom of it.

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