[ovirt-users] When will ovirt add GPU/vGPU support in the admin portal ?

[Daniel Helgenberger]

On 19.01.2015 12:24, Martin Polednik wrote:
>
>
> ----- Original Message -----
>> From: "Jorick Astrego" <j.astrego at netbulae.eu>
>> To: users at ovirt.org
>> Sent: Monday, January 19, 2015 10:14:35 AM
>> Subject: Re: [ovirt-users] When will ovirt add GPU/vGPU support in the admin portal ?
>>
>>
>> On 01/19/2015 02:33 AM, lof yer wrote:
>>>
>>> Since I recently saw cloudstack have add this(
>>> https://cwiki.apache.org/confluence/display/CLOUDSTACK/GPU+and+vGPU+support+for+CloudStack+Guest+VMs
>>> ).
>>> And iGVT(
>>> https://01.org/zh/xen/blogs/wangbo85/2014/intel-gvt-gxengt-pubic-release?langredirect=1)
>>> is released.
>>> If ovirt add this, it'll be very competitive for ovirt in VDI platforms.
>>>
>> See below the response I got about 1 year ago, I don't know the current
>> plans/status...
>>
>>> -------- Forwarded Message --------
>>> Subject: 	Re: [Spice-devel] [Users] desktop virtualization and GPU
>>> support
>>> Date: 	Wed, 16 Oct 2013 14:08:47 +0200
>>> From: 	David Jaša <djasa at redhat.com>
>>> Reply-To: 	spice-devel at lists.freedesktop.org, users <users at ovirt.org>
>>> CC: 	spice-devel at lists.freedesktop.org, users <users at ovirt.org>
>>>
>>>
>>>
>>> Hi,
>>>
>>> I'm afraid that none of these cards will work. IIRC it was explained for
>>> nVidia approach that it would be necessary to add their closed-source
>>> code to qemu which is not going to happen.
>>> You might have better luck with AMD card "passthrough" approach but I'm
>>> not sure if GPUs can be passed through qemu/kvm and if so, how the
>>> GPU-rendered image then gets displayed. So YMMV and don't expect much.
>>>
>>> There is a WIP effort for qemu though that is hardware vendor agnostic -
>>> it's based on creation of virtual GPU in qemu called Virgil that passes
>>> 3D drawing commands to GPU on host. The project is in initial stage
>>> though so it won't be ready even for testing for quite some time. FWIW,
>>> there has been discussion about it on spice-devel in recent days and it
>>> will be presented on upcoming KVM forum so you can get pretty clear
>>> picture about its status from these sources.
>>>
>>> HTH,
>>>
>>> David
>
> Hello,
>
> There is quite active effort to implement device passthrough (including GPU,
> nics, usb etc.)[1].Physical GPU passthrough can be considered generic PCI
> passthrough
IMHO not quite in case of GPUs. I tested that recently with a 
combination of EL7's new default VFIO support [1]. Two things could be 
concluded working with Windows 7 guests and ATI Fire Pro GPUs:
- 'Old' PCI passthough unstable
- VFIO working and performing better (tested with Cinebench OpenGL [2], 
about 98% of the bare metal performance)

As for the stability, the results with VFIO where better in this case. 
The tricky part seems to be the driver installation in the guest, there 
the mandatory device probe in the installer. While PCI passthough 
resulted in Blue Screens, VFIO went though.

[1] 
https://access.redhat.com/sites/default/files/pages/attachments/rhel_whatsnewrhel7beta_techoverview_.pdf
[2] http://www.maxon.net/products/cinebench/overview.html


which should be ready for oVirt 3.6. As for the vGPU, that will
> depend on technology used - SR-IOV would be supported along PCI passthrough,
> anything else might need additional work on our side.
>
> [1] http://www.ovirt.org/Features/hostdev_passthrough
>
> mpolednik
>
>> Met vriendelijke groet, With kind regards,
>>
>> Jorick Astrego
>>
>> Netbulae Virtualization Experts
>>
>> ----------------
>>
>> 	Tel: 053 20 30 270 	info at netbulae.eu 	Staalsteden 4-3A 	KvK 08198180
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>>
>> ----------------
>>
>>
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Daniel Helgenberger
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