/[escript]/trunk/doc/user/Installation.tex
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revision 1705 by ksteube, Thu Aug 14 05:56:40 2008 UTC revision 1805 by ksteube, Wed Sep 24 23:39:00 2008 UTC
# Line 169  mpirun -np 4 <my esys dir>/lib/pythonMPI Line 169  mpirun -np 4 <my esys dir>/lib/pythonMPI
169  When running an MPI job the standard output of process zero goes to the screen, while the standard output of the other processes  When running an MPI job the standard output of process zero goes to the screen, while the standard output of the other processes
170  is automatically redirected to files with names like stdout_cpu_0001.out.  is automatically redirected to files with names like stdout_cpu_0001.out.
171    
172    A python script can obtain the MPI rank and size in two ways.
173    The global number of MPI processes and rank (relative to MPI_COMM_WORLD) are available through
174    \begin{verbatim}
175    iam = getMPIRankWorld()
176    nPE = getMPISizeWorld()
177    \end{verbatim}
178    
179    The rank and size relative to a particular domain object (which may be limited to run on a subset of the
180    total list of MPI processes in future versions of Escript) are available through
181    \begin{verbatim}
182    iam = domain.getMPIRankWorld()
183    nPE = domain.getMPISizeWorld()
184    \end{verbatim}
185    
186  \section{Getting Help}  \section{Getting Help}
187  Please direct any questions you might have to \url{mailto:esys@esscc.uq.edu.au}.  Please direct any questions you might have to \url{mailto:esys@esscc.uq.edu.au}.

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