Public bug reported: The function [1], called during the port retrieval, is killing the performance. Although this code is needed for the BW aware scheduler (Nova-Neutron RFE), the high number of DB calls done inside this function is reducing the performance.
Instead of this, we propose: - To publish inside the port DB object its own network qos policy, if any. - Use it inside this function to retrieve only once, if needed, the QoS policy. NOTE: the patches, if accepted, should be cherry-picked into Stein too. NOTE: benchmarks: done with 60 ports in a development laptop. Command executed: "openstack port list" - Stein and master: 6.5 secs - Stein and master, deleting the code of this function: 1.5 secs - Rocky: 1.5 secs. [1] https://github.com/openstack/neutron/blob/stable/stein/neutron/services/qos/qos_plugin.py#L86 ** Affects: neutron Importance: High Assignee: Rodolfo Alonso (rodolfo-alonso-hernandez) Status: New ** Tags: api qos stein-backport-potential ** Tags added: qos ** Tags added: stein-backport-potential ** Changed in: neutron Assignee: (unassigned) => Rodolfo Alonso (rodolfo-alonso-hernandez) ** Description changed: The function [1], called during the port retrieval, is killing the performance. Although this code is needed for the BW aware scheduler (Nova-Neutron RFE), the high number of DB calls done inside this function is reducing the performance. Instead of this, we propose: - To publish inside the port DB object its own network qos policy, if any. - Use it inside this function to retrieve only once, if needed, the QoS policy. NOTE: the patches, if accepted, should be cherry-picked into Stein too. + NOTE: benchmarks: done with 60 ports in a development laptop. Command executed: "openstack port list" + - Stein and master: 6.5 secs + - Stein and master, deleting the code of this function: 1.5 secs + - Rocky: 1.5 secs. + [1] https://github.com/openstack/neutron/blob/stable/stein/neutron/services/qos/qos_plugin.py#L86 -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1834484 Title: [QoS] qos_plugin._extend_port_resource_request is killing port retrieval performance Status in neutron: New Bug description: The function [1], called during the port retrieval, is killing the performance. Although this code is needed for the BW aware scheduler (Nova-Neutron RFE), the high number of DB calls done inside this function is reducing the performance. Instead of this, we propose: - To publish inside the port DB object its own network qos policy, if any. - Use it inside this function to retrieve only once, if needed, the QoS policy. NOTE: the patches, if accepted, should be cherry-picked into Stein too. NOTE: benchmarks: done with 60 ports in a development laptop. Command executed: "openstack port list" - Stein and master: 6.5 secs - Stein and master, deleting the code of this function: 1.5 secs - Rocky: 1.5 secs. [1] https://github.com/openstack/neutron/blob/stable/stein/neutron/services/qos/qos_plugin.py#L86 To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1834484/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
