Red Hat Bugzilla – Bug 1291351
[7.0.z][RFE][nova]: libvirt: virtio-net multiqueue
Last modified: 2016-09-16 13:28:14 EDT
+++ This bug was initially created as a clone of Bug #1153440 +++
Cloned from launchpad blueprint https://blueprints.launchpad.net/nova/+spec/libvirt-virtio-net-multiqueue.
Add supoort to enable the virtio-net multiqueue feature for guest
With virtio-net multiqueue enabled network performance can be scaled
accross number of vCPUs, by transfering the packets through multiple virtqueue
pairs at a time.
Libvirt driver will set the number of queues equal to the number of guest VCPUs
To control this feature, the following should be set in the flavour extra specs:
This setting can be overriden by the image metadata property if the feature
is enabled in the extra specs:
Specification URL (additional information):
--- Additional comment from Vladik Romanovsky on 2015-09-08 12:41:53 EDT ---
The steps to enable the functionality differs from the original proposal.
Currently, the feature can only be enable or disabled for all vNICs of an instance.
A new parameter has been added to the image properties, for the users
to control the virtio-net multiqueue feature, to be able to enable or disable it.
hw_vif_multiqueue_enabled=true|false (default false)
The number of queues will match the number of vCPUs, defined for the instance.
NOTE: Virtio-net multiqueue should be enabled in the guest OS manually, using ethtool. For example:
ethtool -L <NIC> combined #num_of_queues
*** Bug 1311155 has been marked as a duplicate of this bug. ***
This was discussed with Nokia on 09/16/2016.
NOKIA agreed on closing this as "CLOSED" "WONTFIX".
Nokia has implemented their own solution.
The following was also shared with them: