Nasser,
you should specify the mpi compilers in the configure line. You can do
something like this:
./configure --with-petsc=/usr/lib/petscdir/3.0.0 --with-petsc-
arch=linux-gnu-c-opt CC=mpicc CXX=mpic++ F77=mpif77
and everything should work.
Your analysis is correct, in the sense that deal.II thinks that mpi is
not there, and fills the values of the internal mpi functions with the
defaults (id=0, nprocs=1), for consistency reasons.
If you specify mpi compilers, they are detected, and those functions
should work properly.
Luca.
--
Luca Heltai <[email protected]>
http://people.sissa.it/~heltai/
Scuola Internazionale Superiore di Studi Avanzati
Phone: +39 040 3787 449, Office: 255
--
There are no answers, only cross references.
On 29/ott/2009, at 13.27, Nasser Mohieddin Abukhdeir wrote:
Hello Wolfgang:
I am definitely getting the output twice and I applied the patch
and reran "mpiexec -np 2 ./step-17" on my machine. The first part of
the error follows this message, the OpenMPI package in Ubuntu 8.10
is version 1.3.2-3. I did some fiddling, and it seems both MPI
processes are being given the same ID of 0. I found that in the
utilities.cc code the #define DEAL_II_COMPILER_SUPPORTS_MPI not
existing would default to functions that return 1 for
get_n_mpi_processes() and 0 for get_this_mpi_process() which is
probably what happens, thus I have two questions:
• Am I compiling deal.II correct? I used "./configure --with-petsc=/
usr/lib/petscdir/3.0.0 --with-petsc-arch=linux-gnu-c-opt" and then
"make debug optimized" and the configure script gives this output:
---------------- configuring additional libs ----------------
checking for PETSc library directory... /usr/lib/petscdir/3.0.0
checking for PETSc version... 3.0.0
checking for PETSc library architecture... linux-gnu-c-opt
checking for PETSc libmpiuni library...
I also checked in the makefile, in "common/Make.global_options" and
I do not see the compilers specified as "mpiCC" etc
• In utilities.cc, do you think it would be a better idea to throw
an error if the user's code uses PETSC and PETSC is not available?
Thanks.
Nasser
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