OpenCL (Open Compute Library)

Discussion in 'GPGPU Technology & Programming' started by NocturnDragon, Jun 10, 2008.

  1. fellix

    fellix Hey, You!
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    So... my 5870 is 8.9x faster [in OCL] than Trini's GTX285!? :shock:

    Weird bench.
     
  2. BRiT

    BRiT (╯°□°)╯
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    Not entirely weird considering the GTX285 isn't even a DX10.1 part, let alone DX11.
     
  3. trinibwoy

    trinibwoy Meh
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    What does that have to do with OpenCL....
     
  4. chavvdarrr

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    messed with the system. Made sure correct OpenCL dll is used - now almost all (but not all) opencl samples work on 4670.
    No change for DC 0.35 tho, sigh.
     
  5. Jawed

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  6. Dade

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  7. Arnold Beckenbauer

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    Some more details on the GPU3 core, regarding OpenCL

    How is this possible?
     
  8. mhouston

    mhouston A little of this and that
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    Sigh, the *OpenMM OpenCL port is not fully functional*, the AMD implementation is fully functional and many other software packages and projects are already using it. For example, we showed a bunch of computational chemistry/bio/physics apps running on AMD's implementation (both CPU and GPU) at Supercomputing. You can also see around these forums that our OpenCL implementation is pretty good, although not without bugs.

    Vijay was not sufficiently clear in that post. GPU3 is running CUDA on Nvidia, not OpenCL. The OpenCL port is not working completely anywhere (although I just fixed a bug preventing both Nvidia's and AMD's latest implementations from working at all...) and the base port was just completed at the end of last year. Now it is entering testing and tuning.

    And, Brook runs just fine still, but it is no longer in active development by AMD, it has transitioned back to a fully opensource project as we said we would do.
     
  9. entity279

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    Yeah but unclear is one thing, and saying AMD's implementation is not fully functional is another. It is plain false.

    Or do they have some specific feature in mind when they say it?
     
  10. mhouston

    mhouston A little of this and that
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    It's true that OpenMM on AMD's OpenCL is not currently fully functional, i.e. there is a bug found on compiling 2 kernels making our GPU compiler unhappy, but we are seeing some other issues that haven't been tracked yet.
     
  11. Arnold Beckenbauer

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    The HD4000s do not support OpenCL's Local Memory: Is it a big problem for the GPU3 core?
    (Ok, assuming HD4000s can run the GPU3 core)
     
  12. mhouston

    mhouston A little of this and that
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    We don't know yet what the performance impact will be. It will be kernel dependent for sure and have a lot to do with ALU/Bandwidth ratio of the code.
     
  13. Arnold Beckenbauer

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    Ok. But why don't you port the old ATi physics demos to OpenCL? :lol:
     
  14. Jawed

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  15. Dade

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  16. Arnold Beckenbauer

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  17. Jawed

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    Pretty interesting, "image support" for something that appears to be CPU-only.
     

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