[mcstas-users] MCPL files and mpi

[Huegle, Thomas]

Dear all,

I am trying out using MCPL files as input into simulations right now:

COMPONENT sourceMCPL = MCPL_input( filename="/data/source.mcpl" )
                AT (0, 0, 0) RELATIVE Origin

When I run the simulation using simply "mcrun mcpltester.instr", it takes about half an hour (the MCPL file in question is 24GB).
However, when I try to use mpi ("mcrun -c --mpi=10 mcpltester.instr"), it takes something closer to 50 minutes. The problem seems to get worse (predicted run time for mpi=64: ~17 hours).

Is there a way around it? Some special way of compiling perhaps?

Thank you very much!

Thomas
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