GPU Utilization Factor Confusion: 0.5 = 2 tasks, but 0.3 = 2 tasks

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Paul
Paul
Joined: 3 May 07
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8 Oct 2023 0:01:05 UTC
Topic 230170
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    I've manipulated the utilization factor many times over the years to keep my GPUs fully utilized, so I think I understand how it works, but, I'm not getting the behavior I expect from O3AS.  Can some one please advise?

    I was surprised by and missed the original announcement about FGRP1BG going away, and got caught; FGRP1BG the only E@H app I had turned on.  I noticed a few days ago and turned on O3AS and other apps.  Now, I'm trying to optimize the utilization factor for these unfamiliar apps.

    For FGRP1BG (and other apps), I have tried values of 1, 0.5, 0.32, and 0.25 in the past, and got 1, 2, 3, and 4 concurrent tasks, respectively, as expected.  So, it not only makes mathematical sense, I think I know what to expect from personal experience.  It looks like 0.5 is about right for BRP7, but just 2x O3AS concurrent tasks is not enough for full utilization, so I set it to 0.33, then 0.32, then 0.3, updating the project each time, and I'm still only getting 2 O3AS concurrent tasks.  What am I missing?

    (I'm going to try 0.25, now.  But, I don't understand why I haven't seen any effects from my previous settings changes?)

    Thanks in advance.

    Paul
    Paul
    Joined: 3 May 07
    Posts: 123
    Credit: 1785183415
    RAC: 355505

    Yeah, and I see this in the

    8 Oct 2023 6:10:49 UTC
    Message 217979
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      Yeah, and I see this in the log:

      [coproc] ATI instance 0; 0.500000 pending for h1_0885.80_O3aC01Cl1In0__O3ASHF1a_886.00Hz_16207_1

      So, it's pretty clear that O3AS is NOT getting it's utilization factor from the GW GPU setting. Doesn't that seem wrong?

      Paul
      Paul
      Joined: 3 May 07
      Posts: 123
      Credit: 1785183415
      RAC: 355505

      O3AS doesn't seem to respond

      8 Oct 2023 6:25:38 UTC
      Message 217980
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        O3AS doesn't seem to respond to any of the configurable utilization factors.  I'm really confused.  It must be fixed?

        Paul
        Paul
        Joined: 3 May 07
        Posts: 123
        Credit: 1785183415
        RAC: 355505

        Ah I think I figured it out. 

        8 Oct 2023 6:57:45 UTC
        Message 217982
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          Ah I think I figured it out.  I haven't received any new tasks, so, even though I have changed the computing settings *and* updated the project, my cache is full, and the FAQ about utilization factor says that value will only take affect when new WU are downloaded.

          ...Hmm, I've tried increasing my cache, but that's not working.  It says "no new tasks" is selected, but it is clearly not.  Still confused.

          Paul
          Paul
          Joined: 3 May 07
          Posts: 123
          Credit: 1785183415
          RAC: 355505

          Yeah, okay.  It took 72

          11 Oct 2023 7:57:10 UTC
          Message 218070
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            Yeah, okay.  It took 72 hours, but finally got some new O3AS WUs and the new GW utilization factor took effect, as promised in the fine print.

            Paul
            Paul
            Joined: 3 May 07
            Posts: 123
            Credit: 1785183415
            RAC: 355505

            Funny.  I had this same

            4 Sep 2024 6:07:58 UTC
            Message 227972
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              Funny.  I had this same problem again just about on year later.  Glad I made a note here *because I completely forgot the solution*.

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