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[Bug 1996593] [NEW] [OpenStack-OVN] Poor network performance

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Son Do Xuan <1996593@xxxxxxxxxxxxxxxxxx>
Date: Tue, 15 Nov 2022 08:25:15 -0000
Reply-to: Bug 1996593 <1996593@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx

Public bug reported:

Hi, I deploy a new OpenStack cluster OpenStack (version Yoga, Victoria), neutron using "Networking-ovn".
Then, I create 2 VM (VM is installed by iperf3 tool) on the same network, on the same compute node. I test bandwidth between 2 VM, and the result is:
- Bandwidth is 7 Gbps when the port of the VM has a Security Group.
- Bandwidth is 18 Gbps Gbps when the port of the VM doesn't have a Security Group.

Meanwhile, I deploy a new OpenStack cluster OpenStack (version Yoga, Victoria), neutron use "OpenvSwitch".
Then, I create 2 VM (VM is installed by iperf3 tool) on the same network, on the same compute node. I test bandwidth between 2 VM, and the result is:
- Bandwidth is 18 Gbps when the port of the VM has a Security Group.
- Bandwidth is 18 Gbps Gbps when the port of the VM doesn't have a Security Group.

---> I noticed that the bandwidth between 2 VM (the port of the VM has a
Security Group) is very low when deploying Neutron using Networking-OVN

** Affects: networking-ovn
     Importance: Undecided
         Status: New

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: ovn

** Also affects: networking-ovn
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1996593

Title:
  [OpenStack-OVN] Poor network performance

Status in networking-ovn:
  New
Status in neutron:
  New

Bug description:
  Hi, I deploy a new OpenStack cluster OpenStack (version Yoga, Victoria), neutron using "Networking-ovn".
  Then, I create 2 VM (VM is installed by iperf3 tool) on the same network, on the same compute node. I test bandwidth between 2 VM, and the result is:
  - Bandwidth is 7 Gbps when the port of the VM has a Security Group.
  - Bandwidth is 18 Gbps Gbps when the port of the VM doesn't have a Security Group.

  Meanwhile, I deploy a new OpenStack cluster OpenStack (version Yoga, Victoria), neutron use "OpenvSwitch".
  Then, I create 2 VM (VM is installed by iperf3 tool) on the same network, on the same compute node. I test bandwidth between 2 VM, and the result is:
  - Bandwidth is 18 Gbps when the port of the VM has a Security Group.
  - Bandwidth is 18 Gbps Gbps when the port of the VM doesn't have a Security Group.

  ---> I noticed that the bandwidth between 2 VM (the port of the VM has
  a Security Group) is very low when deploying Neutron using Networking-
  OVN

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