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Top Forums UNIX for Dummies Questions & Answers How do I find the correct environment variables for MPI? Post 302469195 by EinsteinMcfly on Friday 5th of November 2010 11:36:52 AM
Old 11-05-2010
How do I find the correct environment variables for MPI?

Hello all. I've been trying to install NWCHEM in parallel on a new cluster, and have been able to get it to work on single processors by ignoring any MPI environment variables.

This is, of course, pretty worthless. So I'm starting over and trying to get thing set up right for the MPI. The key variables are:
Code:
 USE_MPI="y"
MPI_LIB="/usr/lib64"
#  LIBMPI="/usr/lib64/OMPI/pgi/libmpi.so" ; export LIBMPI
MPI_INCLUDE="/usr/include"
USE_MPIF="y"

As far as I can tell, the MPI_INCLUDE is supposed to be the place where the mpi.h and/or mpif.h are which I think I have correctly. Also, the MPI_LIB is mean to have all of the libmpixxxxxetc, right? That leaves LIBMPI,which I THOUGH was supposed to be the location of the libmpi.so file, but when I set it that way and try to compile I get:
Code:
File with unknown suffix passed to linker: /usr/lib64/OMPI/pgi
/usr/lib64/OMPI/pgi: file not recognized: Is a directory
make: *** [all] Error 2

I get this error whether I include the "libmpi.so" part in the path or not. It appears that it's not finding what it needs in that folder, but then what is it that it's supposed to find?

Thanks for any help.

EMF

---------- Post updated 11-05-10 at 10:36 AM ---------- Previous update was 11-04-10 at 11:58 PM ----------

Sorry for the lack of proper code.

Is this in the correct forum? Is there a parallel forum that I'm missing?

Last edited by pludi; 11-05-2010 at 03:15 AM.. Reason: code tags, please...
 

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MPI_Status_f2c(3)						      LAM/MPI							 MPI_Status_f2c(3)

NAME
MPI_Status_f2c - Convert a status from its Fortran representation to its C representation SYNOPSIS
#include <mpi.h> int MPI_Status_f2c(MPI_Fint *f_status, MPI_Status *c_status) INPUT PARAMETER
f_status - Fortran status OUTPUT PARAMETER
c_status - C status NOTES FOR FORTRAN
All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argument ierr at the end of the argument list. ierr is an integer and has the same meaning as the return value of the routine in C. In Fortran, MPI routines are subroutines, and are invoked with the call statement. All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran. ERRORS
If an error occurs in an MPI function, the current MPI error handler is called to handle it. By default, this error handler aborts the MPI job. The error handler may be changed with MPI_Errhandler_set ; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned (in C and Fortran; this error handler is less useful in with the C++ MPI bindings. The predefined error handler MPI::ERRORS_THROW_EXCEPTIONS should be used in C++ if the error value needs to be recovered). Note that MPI does not guarantee that an MPI program can continue past an error. All MPI routines (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as the value of the function and Fortran routines in the last argument. The C++ bindings for MPI do not return error values; instead, error values are communicated by throwing exceptions of type MPI::Exception (but not by default). Exceptions are only thrown if the error value is not MPI::SUCCESS . Note that if the MPI::ERRORS_RETURN handler is set in C++, while MPI functions will return upon an error, there will be no way to recover what the actual error value was. MPI_SUCCESS - No error; MPI routine completed successfully. SEE ALSO
MPI_Status_c2f(3) MORE INFORMATION
For more information, please see the official MPI Forum web site, which contains the text of both the MPI-1 and MPI-2 standards. These documents contain detailed information about each MPI function (most of which is not duplicated in these man pages). http://www.mpi-forum.org/ LOCATION
handles.c LAM
/MPI 7.1.4 6/24/2006 MPI_Status_f2c(3)
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