how is time slicing handled.

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Anonymous
16 Jul 2013 21:45:46 UTC
Topic 197063
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    I have a pc supporting two projects: E&H and S&H. Both get equal time and resources. The switch out period is 2 hours.

    I have set GPU utilization on E&H to .5 .

    When E&H is in a run state I have 8 CPU WUs processing and 2 GPU WUs processing. The GPU jobs are:
    "Running (0.2 CPUs + 0.5 NVIDIA GPUs). Can someone explain this "Running defintion?

    Also when E&H yields to S&H both E&H GPU jobs go into a "waiting to run" state. S&H takes one of the GPUs. The other is not used until S&H yields to E&H. I would have thought (here we go) that one GPU would have continued with one of the E&H GPU jobs rather then put both of them into "waiting to run".

    Alinator
    Alinator
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    how is time slicing handled.

    16 Jul 2013 22:06:24 UTC
    Message 117618
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      SAH isn't set up to set GPU utilization via the web prefs like EAH is, so you have to make the app_config file yourself for the GPU apps. Here are the general instructions on how to do it. You'll probably want to set the GPU to 0.2 and 0.5 for SAH as well. Default is 1.0 GPU for SAH, which is why it doesn't run an EAH alongside it.

      After you do that, scheduling for CPU tasks and GPU tasks are pretty much independent of each other. So you may see 2 EAH, 2 SAH, or one of each on the GPU and anywhere from none to how many you allow to run of either project on the CPU at any given time depending on circumstances.

      Anonymous

      Thanks for the info. I set

      17 Jul 2013 3:07:12 UTC
      Message 117619 in response to message 117618
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        Thanks for the info. I set an app_config.xml file that looks like this:

        astropulse_v6
        6

        0.5
        0.2

        I performed a re-read of the config file and a restart of boinc-client. However I am not seeing a 2nd S&H job. Do I need to wait until S&H switches out then back in?

        Now I know it is a S&H question I can continue this over there if you think it better.

        Claggy
        Claggy
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        RE: I performed a re-read

        17 Jul 2013 11:00:41 UTC
        Message 117620 in response to message 117619
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          Quote:
          I performed a re-read of the config file and a restart of boinc-client. However I am not seeing a 2nd S&H job. Do I need to wait until S&H switches out then back in?


          The answer is here:

          Client configuration

          Quote:
          Application configuration
          This mechanism allows you to specify scheduling parameters associated with specific applications. It is available with 7.0.40+ client versions.


          Boinc 7.0.27 is too old.

          Claggy

          Anonymous

          Thanks. Found out how to

          17 Jul 2013 18:02:31 UTC
          Message 117621 in response to message 117620
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            Thanks. Found out how to "update/upgrade" BOINC on Ubuntu over on the BOINC forum. I am in the process of doing that now. Will wait however until current downloaded WUs complete before doing the upgrade.

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