Ok, thanks for the detailed explanation... I'd suggest to publish it in your webpage in order to help other users.
Óscar. 2017-05-09 13:24 GMT+02:00 Frediano Ziglio <fzig...@redhat.com>: > There's a bit of confusion. > > The VM sees which cards the hypervisor (Qemu in this case) is configured > to provide. As > any card GPUs can be > 1) physical, fully virtual > 2) paravirtual > 3) pass-through, specifically: > 3.1) full pass-through > 3.2) function pass-through > > 1) like VGA, a physical card is fully emulated, quite slow, there are > some cards which are better than others as requires less guest <-> > hypervisor > switches; > 2) there are no physical card, the card is created just for virtual > environment. > This reduce the switches guest <-> hypervisor and optimized a lot of > functions. > Virgl cards, like QXL or VirtIO cards are like that. Are much more > efficient > and allows lot of features provided by virtual environment (like suspend > or migration). The "best" for Qemu and 3d is surely Virgl but as said > there's > no Windows drivers at the moment; > 3) you pass a full physical card or part of it. This CAN'T be used by the > host > and reduce control not allowing (usually) suspend and migration; > 3.1) basically an entire physical card is passed to the guest. If you have > an additional > GPU (graphical card) you can do it; > 3.2) some cards allow to provide part of its functions to be assigned like > if were a physical card. For GPU currently Qemu/KVM does not provide > much. Work is going to support Intel solutions and Nvidia ones. > Nvidia ones are usually quite expensive (cards do not fit in either laptops > or even desktops) while Intel offers some really cheap solutions using a > mix of hardware/software solution. > > Frediano > > > Hi Christophe, > > Thanks a lot for your clarifications... can you help me with the other > questions? > > *Is there any way to check if is it using client GPU or host CPU?* > > *Is there any Grpahics card to be plugged in the host in order to use host > GPU?* > > thanks a lot. > > > 2017-05-09 12:03 GMT+02:00 Christophe Fergeau <cferg...@redhat.com>: > >> Hey, >> >> On Tue, May 09, 2017 at 10:42:31AM +0200, Oscar Segarra wrote: >> > Hi, >> > >> > What kind of drivers are required in windows? (I supose you mean Windows >> > guest). >> >> A video driver able to use virtio-gpu + virgl would be needed, but does >> not exist at the moment. This is one of the Google Summer of Code >> projects for this year though. >> >> Christophe >> > > >
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