On Sun, Oct 14, 2012 at 8:00 AM, George Mathew <gmnnus at gmail.com> wrote:
> On Sat, Oct 13, 2012 at 4:55 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote: > >> On Sat, Oct 13, 2012 at 3:53 PM, George Mathew <gmnnus at gmail.com> wrote: >> >>> On Sat, Oct 13, 2012 at 3:19 PM, Matthew Knepley <knepley at >>> gmail.com<https://lists.mcs.anl.gov/mailman/listinfo/petsc-users>> >>> wrote: >>> >>> >* On Sat, Oct 13, 2012 at 3:17 PM, George Mathew <gmnnus at gmail.com >>> ><https://lists.mcs.anl.gov/mailman/listinfo/petsc-users>> wrote:*>**>>* I >>> >have petsc 3.3 and mpich2 version 1.4.1p1 installed.*>>* When I run the >>> >example ex2.c code in the petsc user manual, it runs one*>>* one machine >>> >format. But, if I chose to run on multiple nodes, it gives*>>* error.*>>* >>> >The example is the file ${PETSC}/src/ksp/ksp/examples/tutorials/ex2.c.*>>* >>> >I compiled it and when run using the following command, it works.*>>* >>> >mpiexec -f machinefile -n 1 ./ex2*>>* But, if I run it using the >>> >command*>>* mpiexec -f machinefile -n 2 ./ex2*>>* I get the following >>> >error.*>>**>**>* It is very likely that you are running the code with the >>> >wrong mpiexec*>* (from another MPI installation).*>* I cannot tell which >>> >MPI you used with configure.log.*>** >>> >Can you also try >>> >>> >1. Run multiple processes on your local machine >>> >>> >2. Run with -skip_petscrc >>> >>> I have only one MPI installation. It is under /usr/local/bin. The following >>> command works: >>> >>> mpiexec -n 4 ./ex2 >>> >>> So, locally, multiple processes must be running fine. >>> >>> How do I run with -skip_petscrc? >>> >>> >> mpiexec -n 4 -f machinefile ./ex2 -skip_petscrc >> > > Here is the message when run with skip_petscrc: > > $ mpiexec -f machinefile -n 4 ./ex2 -skip_petscrc > [0]PETSC ERROR: PetscWorldIsSingleHost() line 99 in > src/sys/utils/pdisplay.c > [0]PETSC ERROR: PetscSetDisplay() line 125 in src/sys/utils/pdisplay.c > [0]PETSC ERROR: PetscOptionsCheckInitial_Private() line 319 in > src/sys/objects/init.c > [0]PETSC ERROR: PetscInitialize() line 761 in src/sys/objects/pinit.c > PETSC ERROR: Logging has not been enabled. > You might have forgotten to call PetscInitialize(). > application called MPI_Abort(MPI_COMM_WORLD, 56) - process 0 > Can you run any MPI job with that machinefile? Your MPI installations on the different machines could be incompatible. Matt -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20121014/5f3a6513/attachment.html>
