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= HowToParallel = #acl ClamsUserGroup:read,write,delete,revert All:read
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It is possible to run CLaMS on multi-processor machines using MPI or OpenMP.
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On the Ubuntu machines is the PGF compiler suite installed that has MPICH implemented. ## page was renamed from HowToParallel
== ParallelHowTo ==
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In the following a short How to: <<TableOfContents>>
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First it is necessary to make the path of the MPI libraries public by executing: It is possible to run CLaMS on multi-processor machines using MPI.
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for 64bit machines: === Intel Compiler 17.0.1 ===
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{{{
. /opt/pgi/linux86-64/8.0-2/mpi.sh		  The MPICH Library 3.2 is installed in directory ''/usr/nfs/software/icg1/local/mpich-3.2-ifort-17.0.1''.
<<BR>>
 Add the bin subdirectory of the installation directory of MPICH library to your path:
 {{{
PATH=/usr/nfs/software/icg1/local/mpich-3.2-ifort-17.0.1/bin:$PATH
export PATH
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for 32bit machines:

{{{
. /opt/pgi/linux86/8.0-2/mpi.sh		  Remove serial compiled object files:
 {{{
make distclean
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Then compile the needed programs by executing:

{{{
make useMPI=true		  Compile with MPI:
{{{
make useMPI=true progname
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Before running the CLaMS script or a single program you have to execute:

{{{
ssh-add		  Execute on <n> CPUs:
 {{{
mpiexec|mpirun -np <n> <progname>
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This is necessary, because the processes communicate per ssh.

The programs must be called as following:

{{{
mpirun -np # program

# - number of processors

}}}

ParallelHowTo

Contents

  1. ParallelHowTo
    1. Intel Compiler 17.0.1

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

Intel Compiler 17.0.1

  • The MPICH Library 3.2 is installed in directory /usr/nfs/software/icg1/local/mpich-3.2-ifort-17.0.1.


  • Add the bin subdirectory of the installation directory of MPICH library to your path: 
    PATH=/usr/nfs/software/icg1/local/mpich-3.2-ifort-17.0.1/bin:$PATH
export PATH
    Remove serial compiled object files: 
    make distclean
    Compile with MPI: 
    make useMPI=true progname

    Execute on <n> CPUs: 

    mpiexec|mpirun -np <n> <progname>