E@H not utilizing 100% of graphics card

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Oliver Behnke
Oliver Behnke
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Joined: 4 Sep 07
Posts: 984
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RAC: 35

FYI:Our GPU apps differ

6 Apr 2022 11:49:00 UTC
Message 194636
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    FYI:

    • Our GPU apps differ in GPU usage (different math/algorithms and data dependency)
    • The GPU usage of a single task will (almost) never reach 100%
      • Not everything is or can be done on the GPU
      • 70-80% is already good
      • The usage will vary with the GPU vendor/model (lesser extend: OS and driver)
      • We strive for compatibility and correctness rather than ultimate performance
    • GPU apps need a CPU to "feed" the GPU
    • To maximize GPU usage, run more than one GPU task (2-3), if GPU memory allows

    Hope this helps,
    Oliver

    Einstein@Home Project

    bluestang
    bluestang
    Joined: 13 Apr 15
    Posts: 34
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    Your 1070ti should probably

    6 Apr 2022 14:26:32 UTC
    Message 194648
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      )

      Your 1070ti should probably be running 2 concurrent tasks on it to fully utilize it.  You'll need an app_config.xml file in your E@H project data directory...

       

      <app_config>
      <app>
      <name>hsgamma_FGRPB1G</name>
      <gpu_versions>
      <gpu_usage>.5</gpu_usage>
      <cpu_usage>1</cpu_usage>
      </gpu_versions>
      </app>
      </app_config>

       

      The "<name>hsgamma_FGRPB1G</name>" option will only run the Gamma-ray pulsar binary search #1 tasks.

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