Differences between revisions 3 and 21 (spanning 18 versions)
⇤ ← Revision 3 as of 2011-05-06 09:10:17 →
Size: 1332
Editor: NicoleThomas
Comment:
← Revision 21 as of 2024-08-12 08:52:11 → ⇥
Size: 0
Editor: NicoleThomas
Comment: outdated
Deletions are marked like this. Additions are marked like this.
Line 1: Line 1:
## page was renamed from HowToParallel
= HowToParallel =

=== Portland Compiler ===

It is possible to run CLaMS on multi-processor machines using MPI or OpenMP.

On the Ubuntu machines the PGF compiler suite is installed that has MPICH implemented.

In the following a short How to:

First it is necessary to make the path of the MPI libraries public by executing:

for 64bit machines:

{{{
. /opt/pgi/linux86-64/10.4/mpi.sh
}}}

for 32bit machines:

{{{
. /opt/pgi/linux86/10.4/mpi.sh
}}}

Then compile the needed programs by executing:

{{{
make useMPI=true
}}}

Before running the CLaMS script or a single program you have to execute:

{{{
ssh-add
}}}

This is necessary, because the processes communicate per ssh.

The programs must be called as following:

{{{
mpirun -np # program

# - number of processors

}}}


=== Intel Compiler ===

The MPICH2 Library (1.3.2p1) is installed in directory ''/usr/local/icg/icg1/local/mpich2-intel'' (for Intel C and Fortran compilers).

Add the bin subdirectory of the installation directory to your path:
{{{
PATH=/usr/local/icg/icg1/local/mpich2-intel/bin:$PATH
export PATH
}}}

The programs can be compiled with:
{{{
make useComp=ifc useMPI=true <progname>
}}}

Execute on <n> CPUs:
{{{
mpirun -np <n> <progname>
}}}