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nova
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XenAPI: Provide support matrix and doc for VGPU 

This commit is to update support matrix and doc for VGPU feature
on XenAPI.

Implements: blueprint add-support-for-vgpu
Change-Id: I0c9797d1f274e37e3b084d94d0b85980260b2861
This commit is contained in:
Jianghua Wang 2018-02-05 10:04:23 +00:00 committed by Matt Riedemann
parent 5c130ce6d8
commit 511c481f19
1 changed files with 73 additions and 2 deletions
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75
doc/source/admin/virtual-gpu.rst
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@ -113,7 +113,59 @@ Depending on your hypervisor:
nvidia-35 nvidia-36 nvidia-37 nvidia-38 nvidia-39 nvidia-40 nvidia-41 nvidia-42 nvidia-43 nvidia-44 nvidia-45
.. todo:: Discovering GPU types in Xen.
- For XenServer, virtual GPU types are created by XenServer at startup
depending on the available hardware and config files present in dom0.
You can run the command of ``xe vgpu-type-list`` from dom0 to get the
available vGPU types. The value for the field of ``model-name ( RO):``
is the vGPU type's name which can be used to set the nova config option
``[devices]/enabled_vgpu_types``. See the following example:
.. code-block:: console
[root@trailblazer-2 ~]# xe vgpu-type-list
uuid ( RO) : 78d2d963-41d6-4130-8842-aedbc559709f
vendor-name ( RO): NVIDIA Corporation
model-name ( RO): GRID M60-8Q
max-heads ( RO): 4
max-resolution ( RO): 4096x2160
uuid ( RO) : a1bb1692-8ce3-4577-a611-6b4b8f35a5c9
vendor-name ( RO): NVIDIA Corporation
model-name ( RO): GRID M60-0Q
max-heads ( RO): 2
max-resolution ( RO): 2560x1600
uuid ( RO) : 69d03200-49eb-4002-b661-824aec4fd26f
vendor-name ( RO): NVIDIA Corporation
model-name ( RO): GRID M60-2A
max-heads ( RO): 1
max-resolution ( RO): 1280x1024
uuid ( RO) : c58b1007-8b47-4336-95aa-981a5634d03d
vendor-name ( RO): NVIDIA Corporation
model-name ( RO): GRID M60-4Q
max-heads ( RO): 4
max-resolution ( RO): 4096x2160
uuid ( RO) : 292a2b20-887f-4a13-b310-98a75c53b61f
vendor-name ( RO): NVIDIA Corporation
model-name ( RO): GRID M60-2Q
max-heads ( RO): 4
max-resolution ( RO): 4096x2160
uuid ( RO) : d377db6b-a068-4a98-92a8-f94bd8d6cc5d
vendor-name ( RO): NVIDIA Corporation
model-name ( RO): GRID M60-0B
max-heads ( RO): 2
max-resolution ( RO): 2560x1600
...
Caveats
-------
@ -147,7 +199,26 @@ For libvirt:
instance immediately after rescue. However, rebuilding the rescued instance
only helps if there are other free vGPUs on the host.
.. todo:: Xen caveats.
For XenServer:
* Suspend and live migration with vGPUs attached depends on support from the
underlying XenServer version. Please see XenServer release notes for up to
date information on when a hypervisor supporting live migration and
suspend/resume with vGPUs is available. If a suspend or live migrate operation
is attempted with a XenServer version that does not support that operation, an
internal exception will occur that will cause nova setting the instance to
be in ERROR status. You can use the command of
``openstack server set --state active <server>`` to set it back to ACTIVE.
* Resizing an instance with a new flavor that has vGPU resources doesn't
allocate those vGPUs to the instance (the instance is created without
vGPU resources). The proposed workaround is to rebuild the instance after
resizing it. The rebuild operation allocates vGPUS to the instance.
* Cold migrating an instance to another host will have the same problem as
resize. If you want to migrate an instance, make sure to rebuild it after the
migration.
.. Links
.. _Intel GVT-g: https://01.org/igvt-g