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Ben_Foster
Beginner
115 Views

print mpi rank on stdout

When running an f90/mpi code, I would like to prefix all lines written to stdout with the rank of the mpi task, so after completion, I can sort all stdout to separate files for each mpi task. The AIX/xlf90 compiler with IBM MPI lib has an env var to do this, is this possible w/ ifort + Intel MPI? Thanks,
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3 Replies
Gergana_S_Intel
Employee
115 Views

Hi Ben,

You can use the -l mpirun option just for that purpose. Here is an excerpt from our Reference Manual:

-l
Use this option to insert the MPI process rank at the beginning of all lines written to the standard output.

I'm not sure the font here is clear but this is the letter "l" (as in line), and not the number 1.

Let us know if this helps.

Regards,
~Gergana

Ben_Foster
Beginner
115 Views


Wow, that was easy, works great! Thanks a lot Gergana, your quick response is greatly appreciated!

--Ben
Gergana_S_Intel
Employee
115 Views

Glad it helped :)

Regards,
~Gergana

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