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VirtualBox Gets Accelerated Direct3D Support

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  • #16
    Originally posted by Arceliar View Post
    Correct me if I'm wrong, but wouldn't AMD's IOMMU specification (or Intel's equivalent, I forget the name), in theory, greatly boost OpenGL performance, by giving the virtual machine a DMA compatible I/O bus with the graphics card? I mean, I don't know much about it, but from first glance that seems to kind of be the point.

    Granted, it's one more layer to go through than wine has to deal with, but I imagine it'll be some time before wine has better windows compatibility than windows...
    It would yes...

    It has something to do with being able to virtualize IO directly instead of going through a software layer. With AMD's pacifica they are already able to virtualize memory in hardware, and with some upcoming improvements added the IOMMU they should also be able to virtualize IO in hardware. That'll help improve performance a lot, but it still wont be native.

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    • #17
      Originally posted by duby229 View Post
      It would yes...

      It has something to do with being able to virtualize IO directly instead of going through a software layer. With AMD's pacifica they are already able to virtualize memory in hardware, and with some upcoming improvements added the IOMMU they should also be able to virtualize IO in hardware. That'll help improve performance a lot, but it still wont be native.
      Virtualization performance has improved significantly over the years so one would expect video performance to improve significantly as well. The question is if the benefits of virtualization will out weigh the cost.

      [I could be an ass and argue that games are not native because they are not written completely in hand tuned assembler, but that developers trade off performance loss with productivity when choosing toolkits or to run on Windows rather than the good ol days of DOS ;-) )

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      • #18
        WineD3D builds

        People reading this might be interested in my WineD3D builds:

        http://aybabtu.com/rmh/wined3d/

        which are regularly updated from official releases. These are known to work (to some extent) on VirtualBox. See http://www.virtualbox.org/ticket/2940

        Things will get better with next VirtualBox release and/or newer Wine, but with WineD3D 1.1.14 and 2.1.2 (OSE) it's still very experimental. It's only known to work for testcases and simple apps so far.

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        • #19
          Originally posted by Thunderbird View Post
          I would recommend to use Wine for gaming and not to use VirtualBox. Their opengl driver will never perform (the same for a real d3d driver) as well as a native OpenGL driver and for that reason D3D performance will be (a lot) lower than Wine's, so just use Wine.
          The main reasons why someone would want to do that sort of thing is that WINE doesn't deal with DRM very well (heh...if that's not a discouragement for NOT doing this sort of thing in the first place, I don't know what it would be... ) and some people would honestly like to have a full-on sandbox (/me raises his hand...) for isolating that environment when they run Windows stuff (as I rarely do, mainly for verification of things when I'm porting...). WINE doesn't shield you as well as VirtualBox would against malware of varying kinds.

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