odd behaviour on ubuntu 18 with NVIDIA GeForce GTX 770

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Anonymous
3 Nov 2018 15:47:31 UTC
Topic 216818
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    I recently brought a tower unit back on line.  It runs Ubu18 and a Nvidia GeForce GTX 770.  Using Boinc manager I clicked on Update for E@H.  As expected several work units were down loaded.  For the project I had configured for 2 simultaneous GPU WUs to run.  So far all is as expected.  Then on the Einstein website I selected the "Location" for this pc and changed the GPU utilization factor for FGRP from .5 to .33.  After doing this all WU on the pc started to fail with "computation errors.  Of interest the two current active WUs continued to completion but the others as they "became active" failed (the third active WU).  This was a quick death for these WUs.  I dont recall seeing behavior like this before.  

    Sid
    Sid
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    robl wrote:I recently brought

    3 Nov 2018 16:34:50 UTC
    Message 167638
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      robl wrote:
      I recently brought a tower unit back on line.  It runs Ubu18 and a Nvidia GeForce GTX 770.  Using Boinc manager I clicked on Update for E@H.  As expected several work units were down loaded.  For the project I had configured for 2 simultaneous GPU WUs to run.  So far all is as expected.  Then on the Einstein website I selected the "Location" for this pc and changed the GPU utilization factor for FGRP from .5 to .33.  After doing this all WU on the pc started to fail with "computation errors.  Of interest the two current active WUs continued to completion but the others as they "became active" failed (the third active WU).  This was a quick death for these WUs.  I dont recall seeing behavior like this before.  

      Not enough memory on GPU?

      Error in OpenCL context: CL_MEM_OBJECT_ALLOCATION_FAILURE error executing CL_COMMAND_NDRANGE_KERNEL on GeForce GTX 770 (Device 0).

       

       

      Richie
      Richie
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      2GB GPU mem wasn't enough to

      3 Nov 2018 16:49:08 UTC
      Message 167639
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        2GB GPU mem wasn't enough to run tasks 3x at least in the past. But have you tried to stop Boinc completely and see what happens if you restart it (with that 3x setting). Would one of the three tasks fail... or more?

        Anonymous

        Richie wrote:2GB GPU mem

        3 Nov 2018 17:51:30 UTC
        Message 167640 in response to message 167639
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          Richie wrote:
          2GB GPU mem wasn't enough to run tasks 3x at least in the past. But have you tried to stop Boinc completely and see what happens if you restart it (with that 3x setting). Would one of the three tasks fail... or more?

          two tasks would run with a 3rd task trying.  it would run for a few seconds and fail, then the next task above two would run  and it too would fail.  this behavior would continue until all tasks above two concurrent tasks failed.  then I would be locked out from further downloads for several hours as expected.

          Thanks to you both for taking the time to reply.  It seems you nailed it.  

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