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== ParallelHowTo ==
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= ParallelHowTo =
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=== 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-agent
> SSH_AUTH_SOCK=/tmp/ssh-arHtY17224/agent.17224; export SSH_AUTH_SOCK;
> SSH_AGENT_PID=17225; export SSH_AGENT_PID;
> echo Agent pid 17225;
> ssh-add .ssh/id_rsa
}}}

This is necessary, because the processes communicate per ssh.

The programs must be called as following:

{{{
mpirun -np # [ --all-local ] program

# - number of processors
use the option --all-local for running it on the CPUs of the local machine only.
}}}		 It is possible to run CLaMS on multi-processor machines using MPI.
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=== Intel Compiler === === Intel Compiler 14.0.3 ===
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The MPICH2 Library (1.3.2p1) is installed in directory ''/usr/nfs/local/local/mpich2-intel'' (for Intel C and Fortran compilers).

Add the bin subdirectory of the installation directory to your path:
{{{
PATH=/usr/nfs/local/local/mpich2-intel/bin:$PATH		  The MPICH Library is installed in directory ''/usr/nfs/local/local/mpich-intel''.
 Add the bin subdirectory of the installation directory of MPICH library to your path:
 {{{
PATH=/usr/nfs/local/local/mpich-intel/bin:$PATH
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To read the man pages set MANPATH to the following:
{{{
MANPATH=/usr/nfs/local/local/mpich2-intel/share/man:$MANPATH
export MANPATH		  Remove serial compiled object files:
 {{{
make distclean
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The programs can be compiled with:
{{{
make useComp=ifc useMPI=true <progname>		  Compile with MPI: 
 {{{
make useMPI=true [useComp=ifc] progname
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Execute on <n> CPUs:
{{{
mpiexec -np <n> <progname>		  Execute on <n> CPUs:
 {{{
mpiexec|mpirun -np <n> <progname>
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It may be necessary to unset the memory limit:
{{{
ulimit -s unlimited		 === Portland Compiler 14.6 ===

 It is necessary to make the path of the MPI libraries (included in the portland compiler suite) public by executing:
 {{{
. /opt/pgi/linux86-64/14.6/mpi.sh
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 Remove serial compiled object files:
 {{{
make distclean
}}}

 Compile with MPI:
 {{{
make useMPI=true [useComp=pgi] progname
}}}

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

ParallelHowTo

Contents

  1. ParallelHowTo
    1. Intel Compiler 14.0.3
    2. Portland Compiler 14.6

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

Intel Compiler 14.0.3

  • The MPICH Library is installed in directory /usr/nfs/local/local/mpich-intel. Add the bin subdirectory of the installation directory of MPICH library to your path: 

    PATH=/usr/nfs/local/local/mpich-intel/bin:$PATH
export PATH
    Remove serial compiled object files: 
    make distclean
    Compile with MPI: 
    make useMPI=true [useComp=ifc] progname

    Execute on <n> CPUs: 

    mpiexec|mpirun -np <n> <progname>

Portland Compiler 14.6

  • It is necessary to make the path of the MPI libraries (included in the portland compiler suite) public by executing: 
    . /opt/pgi/linux86-64/14.6/mpi.sh
    Remove serial compiled object files: 
    make distclean
    Compile with MPI: 
    make useMPI=true [useComp=pgi] progname

    Execute on <n> CPUs: 

    mpiexec|mpirun -np <n> <progname>