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LLVMpipe's Geometry Processing Pipeline Kicks

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  • LLVMpipe's Geometry Processing Pipeline Kicks

    Phoronix: LLVMpipe's Geometry Processing Pipeline Kicks

    A month ago we talked about Gallium3D's LLVMpipe performing well and providing a much better software rasterizer than what is available with classic Mesa. Using LLVMpipe and a modest CPU for acceleration, the OpenArena was just about playable without any GPU assistance. Now a month later LLVMpipe is becoming a even more serious performer. LLVMpipe now is able to tap into the new geometry processing pipeline and it's causing some major performance gains...

    http://www.phoronix.com/vr.php?view=ODE5Mw

  • #2
    I can't pretend to understand much of what this actually does, but it is certainly good news.

    Can other drivers leverage this? So, will r300g be faster thanks to this?

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    • #3
      Originally posted by HokTar View Post
      Can other drivers leverage this? So, will r300g be faster thanks to this?
      Only software drawing (the softpipe driver) has been improved, r300g shouldn't use the CPU for rendering.

      As I understand it, softpipe is written mainly for debugging, to compare rendering results (thus finding driver bugs) and to temporarily fill in unfinished functionality on new drivers. I don't think the end user is supposed to use it.

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      • #4
        Afaik LLVM won't be used for r300g.

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        • #5
          how well does this scale on multicore cpus?
          is llvm used as a backend for the gallium layer, which is a backend for mesa?
          cpu -> llvm -> gallium3d -> mesa

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          • #6
            Thinking about running some LLVMpipe tests this week or next.
            Michael Larabel
            http://www.michaellarabel.com/

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            • #7
              Originally posted by Michael View Post
              Thinking about running some LLVMpipe tests this week or next.
              This would be great

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              • #8
                The good thing is ability to compile llvmpipe with dri state tracker, so this produces swrastg_dri.so, and replacing swrast_dri.so with this file gives u good boost on software rendering.

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                • #9
                  Typo...

                  LVMpipe leverages the Low-Level Virtal...

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                  • #10
                    Could perhaps be handy for things like WebGL on Netbooks (without Ion, Poulsbo etc.)?

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