Parallel SIR model

Modeling
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7

More details on your implementation are needed for us to help. But in general,

  • When you do mpiexec -n 5 you’re launching 5 identical chains, not 5 procs dedicated to PETSc.
  • You’ll have to control PETSc’ access to MPI ranks through its dedicated communicator (iirc MPI_COMM_PETSC).
  • It’s not clear to me what is in the model that a simple SIR could take advantage of parallelism.
  • There’s a working Stan-PETSc coupling effort by @IvanYashchuk
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