Re: [Xen-users] Xen VGA Passthrough - GTX 480 successfully quadrified to quadro 6000 (softmod) - more than 4GB of RAM for Win XP 64 Bits

[David TECHER <davidtecher@xxxxxxxx>]

FYI I didn't try your patch for the moment.

I noticed the slowdown when setting RAM > 3GB in configuration file. I did the test on a old and fresh current VM XP64.

Yesterday I set up a new VM XP 64 from scratch. Once NVIDIA driver was installed I restarted the VM. Extremely slow if RAM > 3GB.

So I set RAM <= 3GB VM worked pretty fine

Perhaps I may have a try for your patch and let you know.

David

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De : Gordan Bobic <gordan@xxxxxxxxxx>
À : xen-users@xxxxxxxxxxxxx
Envoyé le : Lundi 23 septembre 2013 13h12
Objet : Re: [Xen-users] Xen VGA Passthrough - GTX 480 successfully quadrified to quadro 6000 (softmod) - more than 4GB of RAM for Win XP 64 Bits

On Sun, 22 Sep 2013 18:43:55 +0100 (BST), David TECHER
<davidtecher@xxxxxxxx> wrote:
> Finaly I decided to rebuild a domU WinXP 64 today from scratch.
>
> So the card works as expected. Here is my summary
>
> domU = WinXP 64: RAM is limited to 3GB but the domU works perfecty.
> Setting RAM over 3GB the domU gets slower.

Can you elaborate on this? I am now running XP64 with > 5GB of RAM
(needed to apply my work-in-progres e820_host HVM patch) and
I haven't noticed any slowdown compared to before when running
with 2.5GB of RAM in domU. How did you test/observe the slowdown?

Gordan

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