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

[Aurélien MILLIAT <Aurelien.MILLIAT@xxxxxxxxxxxxxx>]

>On Wed, Aug 22, 2012 at 04:23:02PM +0000, Aurélien MILLIAT wrote:
>> On Tue, Jul 24, 2012 at 04:05:20PM +0000, Aurélien MILLIAT wrote:
>> > 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?
>> 
>> I never tried. I just pass in the VGA card and don't try to pass in the HDMI 
>> driver.
>> 
>> > As it's a particular use of VGA passtrough is it planned to able to use 
>> > synchronization module?
>> 
>> So what is synchronization module for you? That is the HDMI part?
>> 
>> > 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/msg
>> > 00048.html
>> > Thanks,
>> > Aurélien Milliat
>> > 
>> Hi,
>> 
>> I've been able to use ATI FirePro S400 with the unstable version. I've 
>> updated my Dom0 and pass the graphic card as secondary adaptor.
>>
>>
>>Please do not top post.
>Sorry !
>>
>> What did you upgrade dom0 to?
>>
>
>I've update Debian 6.0.4 to 6.0.5, update all packages and remove everything 
>I've made from my previous test. 
>
>I've continue my tests and I've got an issue with active stereo. Previously, 
>I've got tested active stereo with the stable release.  
>
>On unstable version, only the right eye is render (OGLplane and Virtools 
>demos).
>Quad buffer is on, everything seems to be setup as usual for active stereo. 
>I've tried with and without the S400 card.
>
>I will try to gather more informations about this.
>
>>
>> I've made a quick test for Xen 4.1.2 with these updates but it's still crash 
>> (no matter I will use the unstable version).
>>
>> Aurélien
>> 
Hi,

I've got the time to run some test to find what's going on with the active 
stereo with the following configuration:

release                : 2.6.32-5-xen-amd64
version                : #1 SMP Sun May 6 08:57:29 UTC 2012
machine                : x86_64
nr_cpus                : 8
nr_nodes               : 1
cores_per_socket       : 4
threads_per_core       : 2
cpu_mhz                : 2660
hw_caps                : 
bfebfbff:2c100800:00000000:00003f40:029ee3ff:00000000:00000001:00000000
virt_caps              : hvm hvm_directio
total_memory           : 4079
free_cpus              : 0
xen_major              : 4
xen_minor              : 2
xen_extra              : -unstable
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 
hvm-3.0-x86_32p hvm-3.0-x86_64 
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : Sun Jul 22 16:37:25 2012 +0100 25622:3c426da4788e
xen_commandline        : placeholder
cc_compiler            : gcc version 4.4.5 (Debian 4.4.5-8) 
xend_config_format     : 4

I've tested with:
-XP SP2 and SP3 32bits (Pro): 
        + Driver (version: 2012.07.11): active stereo (quadbuffer) enable, S400 
found.
        + OGLplane: Impossible to run active stereo mode: "OpenGL stereo not 
supported".

-Windows 7 32 bits (Pro):
        + Driver (version: 2012.07.11): active stereo enable, S400 found.
        + OGLplane: run without sync signal and render only one eye.

-Windows 8 64bits (debug checked build):
        + Driver (version: 2012.07.11): active stereo enable, S400 found.
        + OGLplane: active stereo seems to be ok.

I will run some tests with the same configuration:
-Windows 7 64 bits (Pro)
-Windows 8 64bits (Final)
-Windows 8 32bits (Final)

I've made a quick test on Xen 4.2.0-rc2 with a compiled kernel from:
http://wiki.xen.org/wiki/Mainline_Linux_Kernel_Configs
Windows 7 has the same behavior and I haven't tried other OS.

Does anyone have run tests for active stereo with VGA passthrough?

Thanks,
Aurélien
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