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phpc-course/Day2/images/collectives.tex
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% Slide 152
\begin{tikzpicture}[scale = 0.4, every node/.style={scale=0.6}]
\begin{scope}
\begin{scope}
\node[anchor = west] (Data) at (0, 4.3) {data};
\node[anchor = east, rotate = 90] (Proc) at (-0.3, 4) {processes};
\draw[->] (Data) -- (3, 4.3);
\draw[->] (Proc) -- (-0.3, 1);
\draw[step = 1cm] (0,0) grid (4,4);
\node at (0.5, 3.5) {$A_0$};
\end{scope}
\draw[->, very thick] (4.5, 2) -- node[midway, above] {broadcast} (6.5, 2);
\begin{scope}[xshift = 7cm]
\draw[step = 1cm] (0,0) grid (4,4);
\foreach \y in {0.5, 1.5, ..., 3.5}
\node at (0.5, 4 - \y) {$A_0$};
\end{scope}
\begin{scope}[yshift = -6cm]
\draw[step = 1cm] (0,0) grid (4,4);
\foreach \x [count = \i from 0] in {0.5, 1.5, ..., 3.5}
\node at (\x, 3.5) {$A_\i$};
\end{scope}
\draw[->, very thick] (4.5, -3.8) -- node[midway, above] {scatter} (6.5, -3.8);
\draw[<-, very thick] (4.5, -4.2) -- node[midway, below] {gather} (6.5, -4.2);
\begin{scope}[yshift = -6cm, xshift = 7cm]
\draw[step = 1cm] (0,0) grid (4,4);
\foreach \x [count = \i from 0] in {0.5, 1.5, ..., 3.5}
\node at (0.5, 4 - \x) {$A_\i$};
\end{scope}
\end{scope}
\begin{scope}[xshift = 15cm]
\begin{scope}[yshift = 0cm]
\draw[step = 1cm] (0,0) grid (4,4);
\foreach \y/\l in {0.5/A, 1.5/B, 2.5/C, 3.5/D}
\node at (0.5, 4 - \y) {$\l_0$};
\end{scope}
\draw[->, very thick] (4.5, 2) -- node[midway, above] {allgather} (6.5, 2);
\begin{scope}[yshift = 0cm, xshift = 7cm]
\draw[step = 1cm] (0,0) grid (4,4);
\foreach \y in {0.5, 1.5, ..., 3.5} {
\foreach \x/\l in {0.5/A, 1.5/B, 2.5/C, 3.5/D} {
\node at (\x, 4 - \y) {$\l_0$};
}
}
\end{scope}
\begin{scope}[yshift = -6cm]
\draw[step = 1cm] (0,0) grid (4,4);
\foreach \y/\l in {0.5/A, 1.5/B, 2.5/C, 3.5/D} {
\foreach \x[count = \i from 0] in {0.5, 1.5, ..., 3.5} {
\node at (\x, 4 - \y) {$\l_\i$};
}
}
\end{scope}
\draw[->, very thick] (4.5, -4) -- node[midway, above, align = center] {complete \\ exchange} (6.5, -4);
\begin{scope}[yshift = -6cm, xshift = 7cm]
\draw[step = 1cm] (0,0) grid (4,4);
\foreach \x/\l in {0.5/A, 1.5/B, 2.5/C, 3.5/D} {
\foreach \y[count = \i from 0] in {0.5, 1.5, ..., 3.5} {
\node at (\x, 4 - \y) {$\l_\i$};
}
}
\end{scope}
\end{scope}
\end{tikzpicture}
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