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% Packages
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%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
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% Document Info
\author{test2000}
\pdfinfo{
  /Title (parallel.pdf)
  /Creator (Cheatography)
  /Author (test2000)
  /Subject (Parallel Cheat Sheet)
}

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% Header and Footer
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\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Parallel Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{test2000} via \textcolor{DarkBackground}{\uline{cheatography.com/168552/cs/35244/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}test2000 \\
  \uline{cheatography.com/test2000} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 5th November, 2022.\\
   Updated 27th January, 2023.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{MPI (Basic)}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
% Row Count 0 (+ 0)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.76 cm} x{4.24 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Setup and Tear Down}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{void main(int argc, char *argv)}} & starts up the MPI runtime environment at the beginning of a run. \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
{\bf{MPI\_Finalize()}} & shuts down the MPI runtime environment at the end of a run. \tn 
% Row Count 7 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Gathering Information}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{MPI\_Comm\_rank(MPI\_COMM\_WORLD,\&myid)}} & gets the process ID that the current process uses, which is between 0 and Np-1 inclusive. \tn 
% Row Count 5 (+ 5)
% Row 1
\SetRowColor{white}
{\bf{MPI\_Comm\_size(MPI\_COMM\_WORLD,\&numprocs)}} & gets the number of processes in a run. \tn 
% Row Count 8 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.8 cm} x{5.2 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{MPI Data Types}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{MPI\_CHAR}} & char \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
{\bf{MPI\_SHORT}} & short int \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
{\bf{MPI\_INT}} & int \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
{\bf{MPI\_FLOAT}} & float \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
{\bf{MPI\_DOUBLE}} & double \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
{\bf{MPI\_LONG\_DOUBLE}} & long double \tn 
% Row Count 7 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{MPI\_BYTE}} & consists of a byte (8 binary digits) \tn 
% Row Count 9 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.28 cm} x{4.72 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Compile}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{mpicc}} -o file file.c & compiles MPI programs written in C. \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{mpiCC}} -o file file.cpp & compiles MPI programs written in C++. \tn 
% Row Count 4 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.6 cm} x{4.4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Run}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{mpirun}} -np no\_processors file & run MPI compiled file with no\_processors \tn 
% Row Count 2 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.16 cm} x{5.84 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Time}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{MPI\_Wtime()}} & Returns an elapsed time on the calling processor \tn 
% Row Count 2 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.84 cm} x{6.16 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{int MPI\_Bcast ( *b, c,d, root,MPI\_Comm )}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{b}} & The message to be broadcasted \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
{\bf{c}} & Number of elements in the message \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{d}} & The data type of the elements in the message \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{root}} & The process number that has the message to be broadcasted to others \tn 
% Row Count 8 (+ 3)
% Row 4
\SetRowColor{LightBackground}
{\bf{MPI\_Comm}} & The communication world \tn 
% Row Count 10 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.92 cm} x{6.08 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{MPI\_Recv( *b, c, d, sender, t, MPI\_Comm, status)}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{b}} & Receive in buffer b \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
{\bf{c}} & The number of element of data type d \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{d}} & The data type of element b \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
{\bf{sender}} & The rank of the sender \tn 
% Row Count 6 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{t}} & The tag used in the communication \tn 
% Row Count 8 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{MPI\_Comm}} & The communication world \tn 
% Row Count 10 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{status}} & the status of the reception operation \tn 
% Row Count 12 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.84 cm} x{6.16 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{int MPI\_Scatter({\emph{sb,sc,sd,}}rb,rc,rd,root,MPI\_Comm)}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{sb}} & The buffer containing the data to disptach from the root process. \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
{\bf{sc}} & The number of elements to send to each process, not the total number of elements in the send buffer. \tn 
% Row Count 7 (+ 4)
% Row 2
\SetRowColor{LightBackground}
{\bf{sd}} & The type of one send buffer element \tn 
% Row Count 9 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{rb}} & The buffer in which store the data dispatched. \tn 
% Row Count 11 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{rc}} & The number of elements in the receive buffer \tn 
% Row Count 13 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{rd}} & The type of one receive buffer element. \tn 
% Row Count 15 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{root}} & The rank of the root process \tn 
% Row Count 16 (+ 1)
% Row 7
\SetRowColor{white}
{\bf{MPI\_Comm}} & The communication world \tn 
% Row Count 18 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.32 cm} x{5.68 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Libraries}}  \tn
% Row 0
\SetRowColor{LightBackground}
\textless{}mpi.h\textgreater{} & For MPI implementation \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\textless{}stdio.h\textgreater{} & C input\&output \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\textless{}math.h\textgreater{} & Handles Math \tn 
% Row Count 3 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.32 cm} x{5.68 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Terms}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Blocking}} & return after their actions complete \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{Non-Blocking}} & return immediately. \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{Message Tag}} & carried within message and used to differentiate between different types of messages being sent \tn 
% Row Count 8 (+ 4)
% Row 3
\SetRowColor{white}
{\bf{MPI\_Status}} & represents the status of a reception operation. \tn 
% Row Count 10 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.08 cm} x{5.92 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{MPI Point-to-Point Communication}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{MPI\_Send()}} & sends a message from the current process to some other process. \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
{\bf{MPI\_Recv()}} & receives a message on the current process from some other process. \tn 
% Row Count 6 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.04 cm} x{4.96 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Collective Communication}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{MPI\_Bcast()}} & Broadcast from root to all other processes \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{MPI\_Gather()}} & Gather values for group of processes \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{MPI\_Scatter()}} & Scatters buffer in parts to group of processes \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{MPI\_Alltoall()}} & Sends data from all processes to all processes \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{MPI\_Reduce()}} & Combine values on all processes to single value \tn 
% Row Count 10 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{MPI\_Reduce\_scatter()}} & Combine values and scatter results \tn 
% Row Count 12 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.44 cm} x{4.56 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{MPI Nonblocking Routines}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{MPI\_Isend()}} & Non-blocking send; will return "immediately" \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
{\bf{MPI\_Irecv()}} & Nonblocking receive; will return even if no message to accept. \tn 
% Row Count 6 (+ 3)
% Row 2
\SetRowColor{LightBackground}
{\bf{MPI\_Wait({\emph{request,}}status)}} & waits until operation completed and returns then. \tn 
% Row Count 9 (+ 3)
% Row 3
\SetRowColor{white}
{\bf{MPI\_Test()}} & returns with flag set indicating whether operation completed at that time. \tn 
% Row Count 13 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{MPI (Detailed)}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
% Row Count 0 (+ 0)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.56 cm} x{5.44 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{MPI\_Send(*d, c, m, receiver, t, MPI\_Comm)}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{d}} & Send Data from address d \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
{\bf{c}} & The number of elements of d \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
{\bf{m}} & The Datatype of d \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
{\bf{receiver}} & The rank of the reciever \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
{\bf{t}} & The communication is marked with t tag \tn 
% Row Count 6 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{MPI\_Comm\_World}} & The communication world \tn 
% Row Count 8 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.84 cm} x{6.16 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{int MPI\_Gather(sb,sc,sd,rb,rc,rd,root,MPI\_Comm)}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{sb}} & The sender buffer \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
{\bf{sc}} & The number of elements in the buffer \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{sd}} & The datatype of one element in the buffer \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{rb}} & The buffer in which store the gathered data for the root process \tn 
% Row Count 8 (+ 3)
% Row 4
\SetRowColor{LightBackground}
{\bf{rc}} & The number of elements per message received, not the total number of elements to receive from all processes altogether. \tn 
% Row Count 12 (+ 4)
% Row 5
\SetRowColor{white}
{\bf{rd}} & The type of one receive buffer element. \tn 
% Row Count 14 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\bf{root}}} \tn 
% Row Count 15 (+ 1)
% Row 7
\SetRowColor{white}
{\bf{MPI\_Comm}} & The communication world \tn 
% Row Count 17 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.84 cm} x{6.16 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{int MPI\_Reduce({\emph{sb,}}rb,c,d,op,root,MPI\_Comm);}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{sb}} & A pointer on the buffer to send for reduction. \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{rb}} & A pointer on the buffer in which store the result of the reduction \tn 
% Row Count 5 (+ 3)
% Row 2
\SetRowColor{LightBackground}
{\bf{c}} & The number of elements in the send buffer \tn 
% Row Count 7 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{d}} & The type of a buffer element. \tn 
% Row Count 8 (+ 1)
% Row 4
\SetRowColor{LightBackground}
{\bf{op}} & The operation to apply to combine messages received in the reduction \tn 
% Row Count 11 (+ 3)
% Row 5
\SetRowColor{white}
{\bf{root}} & The rank of the MPI process that will collect the reduction result. \tn 
% Row Count 14 (+ 3)
% Row 6
\SetRowColor{LightBackground}
{\bf{MPI\_Comm}} & The communication world \tn 
% Row Count 16 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}