On Fri, May 24, 2019 at 02:26:31PM +0800, Colin Coe wrote:
> Hi all
>
> We've just updated our dev environment from 4.1 to RHV 4.3 and found that
> while a lot better, Windows 10 under SPICE still isn't great.
>
> We're running dual screen VMs at 2560x1440 resolution.  The Windows login
> screen is particularly bad although once logged in it gets better but not
> great.  The benchmark here is Windows 10 vs Windows 7 VMs.
>
> We've gone into settings / advanced and set "configure for best
> performance".  Latest RHV tools (4.3-6) are installed.  We've also created
> "/etc/ovirt-engine/osinfo.conf.d/20-overload.properties" containing:
> os.windows_10.devices.display.vramMultiplier.value = 4
> os.windows_10x64.devices.display.vramMultiplier.value = 4
>
> When we set the multiplier to 8, as recommended in another thread,
> ovirt-engine fails to restart.
>
> I know there have been a few threads on this but I'd like to ask what is
> the advice for RHV/oVirt 4.3 to make Windows 10 faster?  VDI on RHV makes
> up an important part of what we do and RDP, VNC, etc are not an option.

* What is the version of spice server running on the host?
* Which device/drivers are you using?

The driver for Windows 8+, including Windows 10 should be the
qxl-wddm-dod [0][1] one. The changelog [2] for the latest
version, 0.19, includes the line "Improve performance vs spice
server 14.0 and earlier".

[0] https://gitlab.freedesktop.org/spice/win32/qxl-wddm-dod
[1] https://www.spice-space.org/download/windows/
[2] https://gitlab.freedesktop.org/spice/win32/qxl-wddm-dod/raw/master/Changelog

Cheers,
Victor