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ZMT zurich med tech

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  2. Sim4Life
  3. Simulations & Solvers
  4. MPI only starts 1 process

MPI only starts 1 process

Scheduled Pinned Locked Moved Simulations & Solvers
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  • P Offline
    P Offline
    Pedro
    wrote on last edited by
    #1

    I'm running a simulation in Sim4Life EM FDTD solver, but its not using the hardware as expected: only a very small percentage of the processor is used during the simulation, which ends up with a very large estimated time to complete.

    Task bar:
    10860403-821e-47dd-a06d-269ba108685e-image.png

    System Usage during simulation:
    8f4a12a3-cbe6-4951-971c-284e142f6405-image.png

    The solver is set to automatically design the number of cores for the simulation. An error is given if I try to set it manually:
    916f56c6-85c2-4099-9f03-7d13d069ae76-image.png

    I'm not exceeding system's hardware. ARES even detects the number of CPU cores:
    074ff567-d8c5-4acb-b3a7-6f672667457b-image.png

    But the simulation always is automatically set to a single process:
    447055ba-6776-4e18-af47-7f1ab596092b-image.png

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    • H Offline
      H Offline
      Habib
      ZMT
      wrote on last edited by
      #2

      Hi @Pedro

      The FDTD solver does not make use of any CPU parallelization and is actually not very suitable for CPU computation except for very small simulations. It is strongly recommended to run FDTD on GPU to benefit from much higher simulation speeds.

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