[Bug 1648206] Re: sriov agent report_state is slow

[Corey Bryant]

** Also affects: neutron (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: neutron (Ubuntu)
       Status: New => Fix Released

** Also affects: neutron (Ubuntu Zesty)
   Importance: Undecided
       Status: Fix Released

** Also affects: neutron (Ubuntu Yakkety)
   Importance: Undecided
       Status: New

** Also affects: neutron (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: neutron (Ubuntu Yakkety)
       Status: New => Confirmed

** Changed in: neutron (Ubuntu Xenial)
       Status: New => Confirmed

** Changed in: neutron (Ubuntu Xenial)
   Importance: Undecided => High

** Changed in: neutron (Ubuntu Yakkety)
   Importance: Undecided => High

** Also affects: cloud-archive/newton
   Importance: Undecided
       Status: New

** Also affects: cloud-archive/mitaka
   Importance: Undecided
       Status: New

** Also affects: cloud-archive/ocata
   Importance: Undecided
       Status: Confirmed

** Changed in: cloud-archive/ocata
       Status: Confirmed => Fix Released

** Changed in: cloud-archive/newton
       Status: New => Triaged

** Changed in: cloud-archive/mitaka
       Status: New => Triaged

** Changed in: neutron (Ubuntu Yakkety)
       Status: Confirmed => Triaged

** Changed in: cloud-archive/newton
   Importance: Undecided => High

** Changed in: neutron (Ubuntu Zesty)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1648206

Title:
  sriov agent report_state is slow

Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive mitaka series:
  Triaged
Status in Ubuntu Cloud Archive newton series:
  Triaged
Status in Ubuntu Cloud Archive ocata series:
  Fix Released
Status in neutron:
  Fix Released
Status in neutron package in Ubuntu:
  Fix Released
Status in neutron source package in Xenial:
  Confirmed
Status in neutron source package in Yakkety:
  Triaged
Status in neutron source package in Zesty:
  Fix Released

Bug description:
  On a system with lots of VFs and PFs we get these logs:

  WARNING oslo.service.loopingcall [-] Function 'neutron.plugins.ml2.drivers.mech_sriov.agent.sriov_nic_agent.SriovNicSwitchAgent._report_state' run outlasted interval by 29.67 sec
  WARNING oslo.service.loopingcall [-] Function 'neutron.plugins.ml2.drivers.mech_sriov.agent.sriov_nic_agent.SriovNicSwitchAgent._report_state' run outlasted interval by 45.43 sec
  WARNING oslo.service.loopingcall [-] Function 'neutron.plugins.ml2.drivers.mech_sriov.agent.sriov_nic_agent.SriovNicSwitchAgent._report_state' run outlasted interval by 47.64 sec
  WARNING oslo.service.loopingcall [-] Function 'neutron.plugins.ml2.drivers.mech_sriov.agent.sriov_nic_agent.SriovNicSwitchAgent._report_state' run outlasted interval by 23.89 sec
  WARNING oslo.service.loopingcall [-] Function 'neutron.plugins.ml2.drivers.mech_sriov.agent.sriov_nic_agent.SriovNicSwitchAgent._report_state' run outlasted interval by 30.20 sec

  
  Depending on the agent_down_time configuration, this can cause the Neutron server to think the agent has died.

  
  This appears to be caused by blocking on the eswitch manager every time to get a device count to include in the state report.

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