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  1. #1
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    POEM: GPU Project Status

    As many of you have noticed, our GPU project has been re-enabled after the update last week.With the apparent error of our last release being fixed, I'm still not satisfied with the failing rate of GPU tasks, especially on NVIDIA cards.I think there are currently three main issues:1. Incompatibility to old AMD GPUs.We're suspecting our latest version of poemcl won't run properly on cards of the Radeon 4000 series, which only have a limited OpenCL support.If you are using such a GPU, and it works however, please let me know which OS and driver version you are using. If there is no working setup, we will exclude the Radeon 4000 series in future releases.2. Multi-GPU NVIDIA hosts still fail when using more than one graphics card for poemcl tasks.If you have attached a host with multiple NVIDIA cards to POEM@HOME, please configure your client to use only one of them for our project, see http://boinc.berkeley.edu/wiki/client_configuration headword exclude_gpu.This is a well known problem which should have been fixed with the last release, but obviously it is a sticky one :(3. There is a new error, which may be related to incompatible OpenCL library versions.If your host uses only a single GPU, but still fails with poemcl tasks, please download one of the following files (depending on your OS):boinc.fzk.de/userdocs/temp/pcl_201_test_linux.tar.gzboinc.fzk.de/userdocs/temp/pcl_201_test_win.zipExtract the files to a new folder, run the executable (if it works, this may take some minutes), and post the content of stderr.txt in this thread.Thanks for your help!I hope we can improve the application soon with your feedback.

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  2. #2
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    Re: POEM: GPU Project Status

    Yes!! Back to work on my 250m MM.
    "Don't confront me with my failures, I had not forgotten them" - Jackson Browne

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  3. #3
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    Re: POEM: GPU Project Status

    Let's hear some runtimes/production on the new Poem OpenCL app!
    Right now I only have it running on one GPU, but I'll be adding others soon:
    HD 6950 Running 2wu/gpu with .5cpu/wu Runtime +/- 29,000 for 39,000 credits/day
    HD 7750 Running 2wu/gpu with .5cpu/wu Runtime +/- 21,000 for 53,500 credits/day
    HD 7790 Running 2wu/gpu with .5cpu/wu Runtime +/- 10,800 for 104,000 credits/day
    HD 7950 Running 2wu/gpu with .5cpu/wu Runtime +/- 10,100 for 111,000 credits/day (underclocked to 825Mhz for heat control)
    HD 7950 Running 3wu/gpu with 1 cpu/wu Runtime +/- 12,280 for 137,000 credits/day (OC'd to 1000Mhz)
    GTX 580 Running 2wu/gpu with 1 cpu/wu Runtime +/- 12,900 for 87,000 credits/day
    GTX 750Ti Running 2wu/gpu with 1 cpu/wu Runtime +/- 14,900 for 75,000 credits/day

    Update: Comparing some initial results, mid-range 7xxx series cards appear to have a distinct efficiency advantage over the higher end cards for the new app. The 7750 & 7790 are getting roughly double the credits/watt than a 7970.

    Update 6/29: Wow, very disappointed with the performance on HD 6950 - I figured there would be a hit due to the slightly older architecture but 27% slower than 7750 and half the production of the 750 Ti? That's bad!

    Update 8/11: Got my 7950 running in a cool environment and overclocked comfortably at 1000Mhz, resulting in a 20% production gain.
    Last edited by FourOh; 08-11-14 at 09:42 AM.



  4. #4
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    Re: POEM: GPU Project Status

    Quote Originally Posted by FourOh View Post
    Let's hear some runtimes/production on the new Poem OpenCL app!
    Right now I only have it running on one GPU, but I'll be adding others soon:
    HD 7750 Running 2wu/gpu with .5cpu/wu Runtime +/- 21,000 for 53,500 credits/day
    I ran it on a GTX570.
    2WUs/gpu with .5 cpu
    Runtime about: 16000 secs/WU
    Credits/day: 70,200

  5. #5
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    Re: POEM: GPU Project Status

    I am running .5 GPU and .5 CPU with my 7970s. 7800-8400 seconds per task.
    "Don't confront me with my failures, I had not forgotten them" - Jackson Browne

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  6. #6
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    Re: POEM: GPU Project Status

    I don't know if it's changed, but Poem use to be a cpu project disguised as a gpu project. In the past it was better to reserve a full core per wu on the fastest processors you had available. The gpu also benefited by being in a x16 slot if at all possible because of the amount of data transfer.



  7. #7
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    Re: POEM: GPU Project Status

    I think it has changed. Now it is more like a normal GPU project, as far as I can tell. At least on AMD GPUs.
    "Don't confront me with my failures, I had not forgotten them" - Jackson Browne

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  8. #8
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    Re: POEM: GPU Project Status

    Cool, that will be a nice change. Too bad they didn't fix the dual nv problem while they were at it.



  9. #9
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    Re: POEM: GPU Project Status

    Quote Originally Posted by Sphynx View Post
    Cool, that will be a nice change. Too bad they didn't fix the dual nv problem while they were at it.
    I bet my work around for the old version works on the new version, I will need to try some day. The original reason I figured out how to get multiple clients to run on the same machine was to ignore all but one NVidia gpu and run Poem on it. One client for each gpu, each only able to see one NVidia.

    I know it getting to be an old on-going theme of mine, but I tell you the multiple client thing solves interesting problems.

  10. #10
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    Re: POEM: GPU Project Status

    Quote Originally Posted by EmSti View Post
    I bet my work around for the old version works on the new version, I will need to try some day. The original reason I figured out how to get multiple clients to run on the same machine was to ignore all but one NVidia gpu and run Poem on it. One client for each gpu, each only able to see one NVidia.

    I know it getting to be an old on-going theme of mine, but I tell you the multiple client thing solves interesting problems.
    My 7970 is looking for work. I couldn't find the app_info.xml anywhere in the searches. Can someone post theirs?

    Thanks!

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