[mpich-discuss] How to run program with arguments with mpich3

[Si, Min]

Hi Kin,

MPICH3.2.1 mpirun should work fine with any application arguments.

Can you please first run a simple helloworld program without arguments ?
mpirun -np 2 ./helloworld

Then try to add some arguments in the program ?
mpirun -np 2 ./helloworld arg1=xx arg2=xx

If you still see the issue in the second step, please send the reproducer program to us. Thanks.

Min


On 2019/03/06 9:37, Yip, Kin via discuss wrote:
Hi,

Nobody has replied/advised and let me try another email before I give up on mpich3.

The problem seems to be related to the "command line arguments" in my application (mcnpx).  It worked in MPICH1
and I found the following in your user guide:  https://www.mpich.org/static/downloads/3.3/mpich-3.3-userguide.pdf, you guys said :

========================================================================
MPICH1 (more precisely MPICH1's mpirun) required access to command
line arguments in all application programs, including Fortran ones, and
configure devoted some e ort to  nding the libraries that contained the right versions of
iargc and getarg and including those libraries with which the mpifort
script linked MPI programs. Since MPICH does not
require access to command line arguments to applications, these functions
are optional, and configure does nothing special with them. If you need
them in your applications, you will have to ensure that they are available in
the Fortran environment you are using
==================================================================

Why do I need to do when compiling MPICH3 (or mcnpx) to take care of the "iargc"/"getarg" part as mentioned in this note ??

I just ran mpich3 like mpich1 :

$ ~/mpich3/bin/mpirun -np 5 -f machines ~kinyip/v270/bin/mpich3/mcnpx  i=ptest n=ptest1.

That's, putting the arguments "i=ptest n=ptest1."  behind the application "mcnpx".

Is it the normal way of using mpich3 ??   In your user guide, you don't have an example of running your application with argument.

Can you please comment here ???

Kin


-------- Forwarded Message --------
Subject:        How to run program with arguments with mpich3
Date:   Tue, 5 Mar 2019 10:01:48 -0500
From:   Yip, Kin <kinyip at bnl.gov><mailto:kinyip at bnl.gov>
To:     discuss at mpich.org<mailto:discuss at mpich.org> <discuss at mpich.org><mailto:discuss at mpich.org>


Hi,

I've got an old code which works in MPICH1 (or 2). Now, I try to use MPICH3 . I've compiled MPICH3.2.1 with:

env F77_GETARGDECL=" " CC="gcc" CXX="g++" FC="gfortran -ff2c -fno-second-underscore" ./configure --with-pm=hydra:gforker:remshell --enable-f90 --enable-f77 --enable-sharedlib --prefix=$HOME/mpich3

and then used it to compile the old code (MCNPX).

When I run,

$ ~/mpich3/bin/mpirun -np 5 -f machines ~kinyip/v270/bin/mpich3/mcnpx i=ptest n=ptest1.


I've always got the error :

bad trouble in mcnpx in routine getexm
invalid number of command line arguments - use mpirun.


It seems that it doesn't understand the "argument" above, which is " i=ptest n=ptest1. ". The gfortran does understand getarg etc. (otherwise, it'd not work with MPICH1).

Do you have any advice to solve the "argument" problem.??


Kin




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