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MPI
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3 changed files with 25 additions and 2 deletions
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@ -6,8 +6,18 @@ Message Passing Interface (kurz: MPI) ist ein Standard,
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der den Nachrichtenaustausch bei parallelen Berechnungen auf
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der den Nachrichtenaustausch bei parallelen Berechnungen auf
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verteilten Computersystemen beschreibt.
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verteilten Computersystemen beschreibt.
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\section{Erste Schritte}
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\inputminted[numbersep=5pt, tabsize=4, frame=lines, label=hello-world.c]{c}{scripts/mpi/hello-world.c}
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Das wird \texttt{mpicc hello-world.c} kompiliert.\\
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Mit \texttt{mpirun -np 14 scripts/mpi/a.out} werden 14 Kopien des Programms
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gestartet.
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\section{Syntax}
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\section{Syntax}
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\section{Beispiele}
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\section{Beispiele}
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\section{Weitere Informationen}
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\begin{itemize}
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\item \url{http://www.open-mpi.org/}
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\end{itemize}
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\index{MPI|)}
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\index{MPI|)}
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13
documents/Programmierparadigmen/scripts/mpi/hello-world.c
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documents/Programmierparadigmen/scripts/mpi/hello-world.c
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@ -0,0 +1,13 @@
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#include <stdio.h>
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#include <mpi.h>
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int main (int argc, char** args) {
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int size;
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int myrank;
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MPI_Init(&argc, &args);
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MPI_Comm_size(MPI_COMM_WORLD, &size);
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MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
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printf("Hello world, I have rank %d out of %d.\n",
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myrank, size);
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MPI_Finalize();
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return 0;
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}
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