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MPI

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Martin Thoma 2014-03-26 09:42:29 +01:00
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documents/Programmierparadigmen/MPI.tex
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@ -117,6 +117,24 @@ Führt eine globale Operation \textbf{op} aus; der Prozeß \enquote{root} erhäl
\end{itemize}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\goodbreak
\rule{\textwidth}{0.4pt}\xindex{MPI\_Alltoall}%
\inputminted[numbersep=5pt, tabsize=4]{c}{scripts/mpi/mpi-alltoall.c}
Teilt Daten von jedem Prozeß einer Gruppe an alle anderen auf.
\textbf{Parameter}
\begin{itemize}
\item \textbf{sendbuf}: Startadresse des Sendepuffers
\item \textbf{sendcount}: Anzahl der Elemente im Sendepuffer
\item \textbf{sendtype}: Datentyp der Elemente des Sendepuffers (handle)
\item \textbf{recvcount}: Anzahl der Elemente, die von jedem einzelnen Prozeß empfangen werden
\item \textbf{recvtype}: Datentyp der Elemente im Empfangspuffer (handle)
\item \textbf{comm}: Kommunikator (handle)
\end{itemize}
\textbf{Beispiel}
\inputminted[numbersep=5pt, tabsize=4]{c}{scripts/mpi/mpi-alltoall-example.c}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\goodbreak
\rule{\textwidth}{0.4pt}\xindex{MPI\_Bcast}%
\inputminted[numbersep=5pt, tabsize=4]{c}{scripts/mpi/mpi-bcast.c}
Sendet eine Nachricht vom Prozess \texttt{root} an alle anderen Prozesse des