Bug 2074896 - [RFE][TestOnly][GA] Evaluate performance with lb-output-action=true in balance-tcp bond
Summary: [RFE][TestOnly][GA] Evaluate performance with lb-output-action=true in balanc...
Keywords:
Status: VERIFIED
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: openvswitch
Version: 16.2 (Train)
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ga
: 17.1
Assignee: Miguel Angel Nieto
QA Contact: Vadim Khitrin
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-04-13 09:52 UTC by Haresh Khandelwal
Modified: 2023-08-14 10:45 UTC (History)
16 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Previously, the Open vSwitch (OVS) bond `balance-tcp` mode was only available in RHOSP as a technology preview. Because of L4 hashing re-circulation issues, the mode was not recommended for production. The issues have been resolved and you can use the OVS bond `balance-tcp` mode. You must set `lb-output-action=true` to use `balance-tcp` mode.
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System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker NFV-2485 0 None None None 2022-04-13 10:13:51 UTC
Red Hat Issue Tracker OSP-14655 0 None None None 2022-04-13 09:58:28 UTC

Description Haresh Khandelwal 2022-04-13 09:52:24 UTC 
Description of problem:

ovs-dpdk bond type "balance-tcp" is currently not support for production environment.It degrades the performance due to extra re-circulations in the datapath.

However, "other_config:lb-output-action=true" helps to improve performance with balance-tcp bond.

we can set it as below. Default is false.

ovs-vsctl set port <bond port> other_config:lb-output-action=<true|false>

We can verify configuration with below

ovs-appctl dpif-netdev/dp-bond-show [dp]
ovs-appctl bond/show

Currently we configure ovs-dpdk bond via ovs_extra in tripleO. we shall continue same with lb-output-action flag set.

                - type: ovs_user_bridge
                  name: br-link0
                  use_dhcp: false
                  ovs_extra:
                    - str_replace:
                        template: set port br-link0 tag=_VLAN_TAG_
                        params:
                          _VLAN_TAG_:
                            get_param: TenantNetworkVlanID
                  addresses:
                    - ip_netmask:
                        get_param: TenantIpSubnet
                  members:
                    - type: ovs_dpdk_bond
                      name: dpdkbond0
                      mtu: 9000
                      rx_queue: 1
                      ovs_extra:
                        - set port dpdkbond0 bond_mode=balance-slb
                      members:
                        - type: ovs_dpdk_port
                          name: dpdk0
                          members:
                            - type: interface
                              name: nic7
                        - type: ovs_dpdk_port
                          name: dpdk1
                          members:
                            - type: interface
                              name: nic8

lb-output-action is already supported by red hat fast datapath. 

Expectations here are 
 - Successful deployment on all nodes with lb-output-action
 - Performance comparison with/without lb-output-action

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