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Type: Posts; User: John_Idol

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  1. Replies
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    1,449

    Re: CL_INVALID_WORK_GROUP_SIZE on OSX Lion

    Hi David, thanks for your help.



    Can you articulate further on this - how would my kernel affect the maximum work-group size Yeah, I am a noob!



    This sounds promising, so basically I need...
  2. Replies
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    1,449

    CL_INVALID_WORK_GROUP_SIZE on OSX Lion

    Hi All,

    I am using JOCL as the binding for OpenCL.

    Exact same code running OK (and fast) on Snow Leopard (OpenCL 1.0) but is throwing the following error on Lion (OpenCL 1.1):
    ...
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    Re: Cross-platform issues MacOSX / Linux

    Thanks -- what exactly do you mean by aligned?

    If you mean same exact values for all the input and output buffers then the answer is yes, that the way I expect them to be, but even so the...
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    Cross-platform issues MacOSX / Linux

    Hi everyone,

    I have a simple kernel [ http://goo.gl/PBTsg ] that has been working OK on MacOSX (ATI HD4850 / nVidia GeForce whatever) for a while. I am using JOCL as a wrapper, and here is the ...
  5. Re: How to pass/return 2-dimensional arrays in a kernel?

    Hi David, first of all thanks for your prompt reply.


    you mean I can define a struct and pass it down as a kernel parameter? Sweet, I didn't know (can you point me to any example?).


    I see...
  6. How to pass/return 2-dimensional arrays in a kernel?

    Hi All,

    I seem to understand I cannot pass down/return 2-dimensional arrays in OpenCL (declared smt like float** for example in the kernel signature).

    Is there a way to work around this? Can I...
  7. Re: exponential on input value causes CL_BUILD_PROGRAM_FAILU

    Yep - it looks like my GPU [ATI HD 4850 http://goo.gl/jb7v2] does not support double-precision. Shoot!

    Good thing I can do without for now -thanks for all the help!
  8. Re: exponential on input value causes CL_BUILD_PROGRAM_FAILU

    For some reason even with the #pragma I am still getting the same. I can live with the floats for now but I'd like to understand why this is happening.

    Here is the full error (I am using jocl,...
  9. Re: exponential on input value causes CL_BUILD_PROGRAM_FAILU

    Thanks a lot for your prompt reply David,

    in the meantime I found out that if I replace the doubles with floats it works like a charm (without any casts, I had the casts there because - even with...
  10. exponential on input value causes CL_BUILD_PROGRAM_FAILURE

    Hi everyone,

    I have a simple test kernel with input/output buffers declared as follows:


    // OpenCL Kernel Function for Hodgkin Huxley integration step
    kernel void Exponential(global const...
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    How do I check OpenCL is OK? Mac/Windows

    Hi all,

    I am starting on OpenCL Development, I found some tutorials but they all assume you have OpenCL drivers up and running.

    But How do I check this is the case and OpenCL is ready to go?
    ...
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