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| #acl ClamsUserGroup:read,write,delete,revert All:read ## page was renamed from HowToParallel <<TableOfContents>> = ParallelHowTo = === 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. }}} === 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/nfs/local/local/mpich2-intel/bin:$PATH export PATH }}} To read the man pages set MANPATH to the following: {{{ MANPATH=/usr/nfs/local/local/mpich2-intel/share/man:$MANPATH export MANPATH }}} The programs can be compiled with: {{{ make useComp=ifc useMPI=true <progname> }}} Execute on <n> CPUs: {{{ mpiexec -np <n> <progname> }}} It may be necessary to unset the memory limit: {{{ ulimit -s unlimited }}} |
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