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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: neutron
       Status: Fix Committed => Fix Released

** Changed in: neutron
    Milestone: None => kilo-3

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https://bugs.launchpad.net/bugs/1429753

Title:
  Improve performance of security groups rpc-related code

Status in OpenStack Neutron (virtual network service):
  Fix Released

Bug description:
  In a case when large number of VMs (> 2-3 thousand) reside in one L2
  network, security group listing for ports requested from OVS agents
  consumes significant amount of CPU.

  When VM is spawned on such network, every OVS agent requests update sec groups info on each of its devices. 
  Total time needed to process all such RPC requests that were caused by 1 VM spawn may reach tens of cpu-seconds.

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