Re: Fwd: Re: Xen 4.3 / 4.4 - concurrent APIs, VGA Passthru

[Richie <listmail@triad.rr.com>]

On 8/18/2014 11:45 AM, Gordan Bobic wrote:
> On 08/18/2014 04:26 PM, Georg Bege wrote:
>> Hi
>>
>> I simply wanted to tell my tale about the outcome of my experiments,
>> I was occupied with certain other things (including exchanging some
>> zpool's).
>> For now I run an Vista x64 and it works pretty well, I never got the
>> gplpv drivers running on
>> acceptable levels (they are still quite slow) so I decided to pass
>> onboard controller, sound and usb3.
>> This decission seemed to be a wise one and everything works great as
>> expected, the problem with gplpv
>> well it might also be a result of my volume scheme since I only run ZFS
>> - now an raidz1 (on enterprise disks though).
>> I also replaced the nvidia drivers from 331.65 to 337.88 - this revision
>> gave me a lot more performance but I can remember I had this issue on
>> native Windows too.
>>
>> So after a lot of testing, pain, time consuming days (and nights) its
>> really working great - not perfect maybe.
>> My next goal is to dedicate an SSD for that system volume, maybe try
>> Win7 again as well -
>> also I'd like to get an GTX690 and hardmod it so I get a lot more
>> speed...
>
> Modifying it won't get you more speed.
>
> I was originally planning to use a GTX690 and pass one GPU to each of
> my VMs, but I eventually replaced it with a pair of 780Tis.
>
> I am running on a SSD backed zvol, with gplpv.
>
> Gordan
>

Do you mind posting the specifics on your setups?  I read as many 
threads with this topic as I could find in the archives. It sounds like 
you are using Xen 4.3.2, Vista 64, nonmodded GTX as secondary 
passthrough and older nvidia drivers.

Did you have to do any vBAR patching?  Are you loading a copy of the 
VGA's rom bios?   Yes those are things I had to do back in 2010, but 
maybe those things are not applicable anymore.   Thanks for any info.