[MPICH] running an MPI prog

[Mark.Donohue at avtechgroup.com]

Hello Rajeev.  Good question as I didn't compile the MPI program myself.
But you're probably onto something as I am using MPICH2-1.0.5 and I have
a strong hunch the code was compiled with MPICH1.  That's a show-stopper
huh?  Would your suggestion be to install the same version of MPICH1
that compiled the code?  Thanks again!
-mark

-----Original Message-----
From: Rajeev Thakur [mailto:thakur at mcs.anl.gov] 
Sent: Thursday, July 26, 2007 9:55 PM
To: Mark Donohue
Cc: mpich-discuss at mcs.anl.gov
Subject: RE: [MPICH] running an MPI prog

Make sure you are compiling and running your program with mpif90 and
mpiexec from the same MPI implementation. Give the full path to mpiexec
if needed.

Rajeev 

> -----Original Message-----
> From: owner-mpich-discuss at mcs.anl.gov 
> [mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of Anthony Chan
> Sent: Thursday, July 26, 2007 7:29 PM
> To: Mark.Donohue at avtechgroup.com
> Cc: mpich-discuss at mcs.anl.gov
> Subject: Re: [MPICH] running an MPI prog
> 
> 
> Can you run a simple MPI program like cpi in 
> <mpich2-build-dir>/examples ?
> 
> cd <mpich2-build-dir>/examples
> <mpich2-build-dir>/bin/mpiexec -n 4 cpi
> 
> A.Chan
> 
> On Thu, 26 Jul 2007 Mark.Donohue at avtechgroup.com wrote:
> 
> > Hi yall.  Please help a simpleton with some basic MPICH
> knowledge.  I am
> > trying to run an MPI version of a CFD program that I use
> regularly.  I
> > installed MPICH2 on our Linux cluster, but when I try and
> run, I get the
> > error at the bottom.  I split my computational domain into two 
> > partitions, and the program complains that the number of
> partitions (2)
> > doesn't equal the number of processors.  Huh?  Is there a way to fix

> > this?  I realize that this error is coming from my MPI code
> and not from
> > MPICH itself, but I was hoping to gain some insight into why this is

> > happening.  For some reason I thought specifying "-n 2"
> meant that it
> > will begin running with two processors.  All the documentation I've 
> > found hasn't been able to answer this for me.  Thanks a bunch!
> > -Mark
> >
> >
> >
> > Aero1% mpiexec -l -machinefile myhosts -n 2 usm3d_52p.mpip4 
> > Baseline_Elev
> > 0: ** WARNING: fp stack is not empty
> > 0: ** after call to etime in routine usm52p
> > 0:
> > 0: ** popping the fp stack and continuing...
> > 1: ** WARNING: fp stack is not empty
> > 1: ** after call to etime in routine usm52p
> > 1:
> > 1: ** popping the fp stack and continuing...
> > 1: FORTRAN STOP
> > 1:  the MPI has been initialized on            1  processors
> > 1:   no. of partitions != no. of processors
> > 0: FORTRAN STOP
> > 0:  the MPI has been initialized on            1  processors
> > 0:   no. of partitions != no. of processors
> >
> >
> 
>