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Thread: Milkyway: OpenCL for Nvidia available for testing

  1. #1
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    Milkyway: OpenCL for Nvidia available for testing

    The OpenCL application for Nvidia GPUs is ready for testing for Windows and Linux x86_64. I'm particularly interested in the performance / responsiveness tradeoff on mid-low range GPUs. Many thanks to cncguru for donating his GTX 480. If I hadn't had it, it would be about 30% slower than it is. http://milkyway.cs.rpi.edu/milkyway/..._opencl.tar.gz http://milkyway.cs.rpi.edu/milkyway/...uda_opencl.zip Extract these to the project directory. On Windows this is something like C:\ProgramData\BOINC\projects\milkyway.cs.rpi.edu_ milkyway On Ubuntu for me, this is /var/lib/boinc-client/projects/milkyway.cs.rpi.edu_milkyway

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  2. #2
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    Re: Milkyway: OpenCL for Nvidia available for testing

    I assume a 9800 is still out of the running.
    6r39 7r199



  3. #3
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    Re: Milkyway: OpenCL for Nvidia available for testing

    Quote Originally Posted by trigggl View Post
    I assume a 9800 is still out of the running.
    Not sure. According to nVidia's OpenCL Programming Guide for the CUDA Architecture, Appendix A.3:

    All compute devices supports the cl_khr_byte_addressable_store extension.

    Devices of compute capability 1.1 and higher support the cl_khr_global_int32_base_atomics, cl_khr_global_int32_extended_atomics, cl_khr_local_int32_base_atomics, and cl_khr_local_int32_extended_atomics extensions.

    Does this answer your question, I hope?


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  4. #4
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    Re: Milkyway: OpenCL for Nvidia available for testing

    Quote Originally Posted by Fire$torm View Post
    Not sure. According to nVidia's OpenCL Programming Guide for the CUDA Architecture, Appendix A.3:

    All compute devices supports the cl_khr_byte_addressable_store extension.

    Devices of compute capability 1.1 and higher support the cl_khr_global_int32_base_atomics, cl_khr_global_int32_extended_atomics, cl_khr_local_int32_base_atomics, and cl_khr_local_int32_extended_atomics extensions.

    Does this answer your question, I hope?
    Last I heard, you need double precision. I don't think I've got that.

    Thu 02 Dec 2010 11:45:19 PM CST Milkyway@home Message from server: Your NVIDIA GPU lacks the needed compute capability (1.3, required for double precision math

    Just to be sure, since I didn't realize I needed to download the new app, I installed the downloaded app, and of course I got this.
    Device doesn't support double precision
    Device failed capability check
    Failed to calculate integral 0
    23:58:37 (24536): called boinc_finish
    Last edited by trigggl; 12-03-10 at 12:57 AM.
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  5. #5
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    Re: Milkyway: OpenCL for Nvidia available for testing

    You need double precision for the native apps. However, what they are referring to in that post aren't native - you need to run the app_info file to get them to work, and download the files linked to in the original post. So, I'll echo Fire$torm's resounding "maybe"...

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    Re: Milkyway: OpenCL for Nvidia available for testing

    Quote Originally Posted by Maxwell View Post
    You need double precision for the native apps. However, what they are referring to in that post aren't native - you need to run the app_info file to get them to work, and download the files linked to in the original post. So, I'll echo Fire$torm's resounding "maybe"...
    See last thing I posted above. It still needs double precision
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  7. #7
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    Re: Milkyway: OpenCL for Nvidia available for testing

    Quote Originally Posted by trigggl View Post
    Last I heard, you need double precision. I don't think I've got that.

    Thu 02 Dec 2010 11:45:19 PM CST Milkyway@home Message from server: Your NVIDIA GPU lacks the needed compute capability (1.3, required for double precision math

    Just to be sure, since I didn't realize I needed to download the new app, I installed the downloaded app, and of course I got this.
    DUH. My error. You are correct. MilkyWay is always Double Precision. I was tired when I posted and IIRC I was thinking (Really, is that what you call it?) nVidia question = non-MW project problem.


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