| 2021-08-24 09:27:27 |
Cedric Lemarchand |
description |
There are 3 options to present a gpu to a guest:
- PCI passthrough
- SR-IOV
- vGPUs
The later is actually not usable with nova-compute charm, as the [devices] section of nova.conf is not handled (see [1] [2]).
A first step, which should be pretty strait forward, would be to allow a single value for "enabled_vgpu_types".
In terms of documentation, if the GPU driver is correctly installed on the hypervisor (qemu-kvm here), vgpu type can be discovered either with "mdevctl types" command or by listing "/sys/bus/pci/devices/0000:XX:YY.0/mdev_supported_types" path of the pci device.
[1] https://docs.openstack.org/nova/ussuri/admin/virtual-gpu.html
[2] https://docs.openstack.org/nova/ussuri/configuration/config.html#devices.enabled_vgpu_types |
There are 3 options to present a gpu to a guest:
- PCI passthrough
- SR-IOV
- vGPUs
The later is actually not usable with nova-compute charm, as the [devices] section of nova.conf is not handled (see [1] [2]).
A first step, which should be pretty strait forward, would be to allow a single value for "enabled_vgpu_types".
In terms of documentation, if the GPU driver is correctly installed on the hypervisor (qemu-kvm here), vgpu types can be discovered either with "mdevctl types" command or by listing "/sys/bus/pci/devices/0000:XX:YY.0/mdev_supported_types" path of the pci device.
[1] https://docs.openstack.org/nova/ussuri/admin/virtual-gpu.html
[2] https://docs.openstack.org/nova/ussuri/configuration/config.html#devices.enabled_vgpu_types |
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