[Pw_forum] OpenMPI on mac

[Yaser Rehem]

Ricardo-

I don't have experience with your configuration, however, I can tell  
you that openmpi 1.2.4 installed via macports worked fine when I  
compiled 4.0 with g95 on my Mac.

If all else fails you can try that configuration.

Cheers,

-Yaser Rehem
Rehem Research & Consulting

On Apr 22, 2008, at 6:18 AM, Riccardo Sabatini wrote:

> Hi everyone,
>
>     i'm starting in these days to setup a little cluster (well, just
> two intel mac dual
> core, osx 10.5.2) to learn how parallel processing works. I'm working
> with the espresso
> version 4.0 and i have Intel Fortran compiler (v10) and gcc from the
> developers tools
> (xcode 2.5, gcc 4.01) on both the machines.
>
>     I downloaded and compiled OpenMPI and i'm pretty sure it works
> fine on both computer
> (i tried with a very simple program from the openmpi website). Now i
> tried to compile QE
> with all the wrappers (mpif90, mpicc, mpicxx, mpif77) in the make.sys,
> at least that's
> what the openmpi suggests to do in their FAQ. The compilation runs
> perfectly but when i
> try to run a simple simulation the programs fails with this error  
> message
>
> *** An error occurred in MPI_Comm_f2c
> *** before MPI was initialized
> *** MPI_ERRORS_ARE_FATAL (goodbye)
> [rikis-macbook.local:56606] Abort before MPI_INIT completed
> successfully; not able to
> guarantee that all other processes were killed!
>
>     The command i use is
>
>     mpirun -np 2 $PWROOT/bin/pw.x < si.scf.in
>
>     and i run it on just one mac (my laptop). To be precise i can see
> two times the
> error, as if both the processes break for the same problem. I
> understood the problem is
> the fortran-c handler but i really have no idea how to fix this. I
> haven't worked yet on
> the real cluster but i think if it's not working with the dual core
> alone no hope with
> the rest....
>
>     Waiting for your news, thanks a lot for the help. Kind regards,
>
>                 Riccardo
>
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