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

On 8/18/2014 11:45 AM, Gordan Bobic wrote:
On 08/18/2014 04:26 PM, Georg Bege wrote:

I simply wanted to tell my tale about the outcome of my experiments,
I was occupied with certain other things (including exchanging some
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

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.


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.

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