[Spice-devel] "qxl: add optinal 64bit vram bar" patch significantly slows down Spice

[Hans de Goede]

Hi,

On 04/16/2012 02:43 PM, Gerd Hoffmann wrote:
>    Hi,
>
>> Looks like both the BAR and it's backing region were initialized to 4k.
>> The number 4096 does show up in the patch, probably it sneaked into the
>> BAR somehow.
>
> Yea, one page is the minimum size, that shouldn't have been the default
> though.  Alon has a fix for it (attached), still in the queue due to me
> having been sick for two weeks.  Hans, does the patch improve things?

Heh, I just re-invented Alon's patch :| It is exactly the same, no
surprise there once you've pinpointed the issue, the fix is trivial :)

I've just competed testing of my own re-invention of that patch, and with
it applied the slow down is gone. So that likely is the cause.

Regards,

Hans