[mpich-discuss] How to run MPI code on a single machin with four cores when using MPICH2

[Jayesh Krishna]

Hi,
 You should be able to launch different executables as part of the same job by separating the executables (and the executable specific args) by a colon (:). Try the following command and let us know if it works for you.

mpiexec -n 1 D:\HORACIO\DOCTORADO\2-Corridas\MPI\Cluster\Prueba32-01 : -n 1 D:\HORACIO\DOCTORADO\2-Corridas\MPI\Cluster1\Prueba32-01 : -n 1 D:\HORACIO\DOCTORADO\2-Corridas\MPI\Cluster2\Prueba32-01 : -n 1 D:\HORACIO\DOCTORADO\2-Corridas\MPI\Cluster3\Prueba32-01


Regards,
Jayesh
----- Original Message -----
From: Horacio Pedro Burbridge <hpbridge at yahoo.com.ar>
To: mpich-discuss at mcs.anl.gov
Sent: Sat, 20 Nov 2010 16:35:40 -0600 (CST)
Subject: [mpich-discuss] How to run MPI code on a single machin with four	cores when using MPICH2

Hello,
 
I got this e-mail from the mpich_discuss forum. I have already suscribed to it.
 
I have a code paralellized that is runnig OK when I compile it using Win32 Intel 
Fortran compiler and MPICH1 libraries.
When I compile it using EMT64 Intel Fortran compiler and MPICH2 libraries it is 
compiled OK but I can´t make it run.
 
I need to run this on a single Windows 7 machine using its four cores (Intel 
i7). Once the core is finished I will run it on a 20 node cluster. Now my 
problem is to run on a single machine. 

When running the win32 MPICH1 compiled executable there is no problem at all. 
I´m using four different folders and executing four executables. The executables 
are the same, but the information they use is readed from different folders. For 
this, I´m setting the enviromental varibles manually, and runing the executable 
"Prueba32-01.exe" on four cores as follows:
 
file "mpi.bat" on folder \HORACIO\DOCTORADO\2-Corridas\MPI\Cluster:
 
 D:
 cd 
\HORACIO\DOCTORADO\2-Corridas\MPI\Cluster                                                                 
 
   
 set MPICH_JOBID=ns.123
 set MPICH_IPROC= 0
 set MPICH_NPROC= 4
 set MPICH_ROOT=Usuario-PC:1
 Prueba32-01

file "mpi.bat" on folder \HORACIO\DOCTORADO\2-Corridas\MPI\Cluster1:
 
 D:
 cd 
\HORACIO\DOCTORADO\2-Corridas\MPI\Cluster1                                                                  

   
 set MPICH_JOBID=ns.123
 set MPICH_IPROC= 1
 set MPICH_NPROC= 4
 set MPICH_ROOT=Usuario-PC:1
 Prueba32-01
 
file "mpi.bat" on folder \HORACIO\DOCTORADO\2-Corridas\MPI\Cluster2:
 
 D:
 cd 
\HORACIO\DOCTORADO\2-Corridas\MPI\Cluster2                                                                 
 
   
 set MPICH_JOBID=ns.123
 set MPICH_IPROC= 2
 set MPICH_NPROC= 4
 set MPICH_ROOT=Usuario-PC:1
 Prueba32-01

 
file "mpi.bat" on folder \HORACIO\DOCTORADO\2-Corridas\MPI\Cluster3:
 
 D:
 cd 
\HORACIO\DOCTORADO\2-Corridas\MPI\Cluster3                                                                  

   
 set MPICH_JOBID=ns.123
 set MPICH_IPROC= 3
 set MPICH_NPROC= 4
 set MPICH_ROOT=Usuario-PC:1
 Prueba32-01

This works fine with MPICH1. I couldn´t find a way to launch this executable on 
four different folders using mpiexec or even manually by setting the 
environmental variables "PMI_RANK" and "PMI_SIZE"

Could you please help me?

Thank you in advance.
 Horacio.