[Xen-devel] ATI VGA passthrough and S400 Synchronization module

[Aurélien MILLIAT <Aurelien.MILLIAT@xxxxxxxxxxxxxx>]

Hi,

 

I’m currently trying to use XEN on graphical cluster.

VGA passtrough works fine and I’m able to use quad-buffer for active stereo.

The last thing to do is to synchronize all GPU from the cluster.

For this purpose I use ATI FirePro S400 and it didn’t works.

 

I’ve seen two behaviors:

-When I run lspci command on Dom0 I’ve got:

0f:00.0 VGA compatible controller: ATI Technologies Inc Device 6888

0f:00.1 Audio device: ATI Technologies Inc Cypress HDMI Audio [Radeon HD 5800 Series]

And sometimes just

0f:00.0 VGA compatible controller: ATI Technologies Inc Device 6888

-When a DomU(Windows 7) is running, it’s very slow (I can’t do anything) and crash after several minutes.  

I’ve tried with the unstable version and I’ve seen the same ‘lspci’ behavior.

 

I’ve a couple of questions:

Is it possible to passthrough a VGA with this extension?

As it’s a particular use of VGA passtrough is it planned to able to use synchronization module?

Is it easy to add this feature (time cost)?

 

Computers : HP Z800 workstation

GPU: ATI FirePro V8800

CPU: Intel Xeon E5640

MB: Intel 5520 chipset

 

XEN :

Version  4.1.2

With ATI patch from http://old-list-archives.xen.org/archives/html/xen-users/2011-05/msg00048.html

Thanks,

Aurélien Milliat

 

 

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