Commit cae8f6d8 authored by Dominic Etienne Charrier's avatar Dominic Etienne Charrier
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parent 6804843e
...@@ -392,12 +392,12 @@ metric if you switch this feature on (\texttt{hotspot}, e.g.). ...@@ -392,12 +392,12 @@ metric if you switch this feature on (\texttt{hotspot}, e.g.).
\subsection{Meshes for weak and strong scaling} \subsection{Meshes for weak and strong scaling}
\exahype distributes work by decomposing the tripartitioned spacetree into \exahype\ distributes work by decomposing the tripartitioned spacetree into
subtrees that are deployed to worker processes. subtrees that are deployed to worker processes.
Only subtrees that overlap with the computational domain are deployed. Only subtrees that overlap with the computational domain are deployed.
This constraint can be used to steer work distribution. This constraint can be used to steer work distribution.
\exahype can scale the bounding box such that \texttt{outside\_cells\_left} and/or \\ \exahype\ can scale the bounding box such that \texttt{outside\_cells\_left} and/or \\
\texttt{outside\_cells\_right} cells are placed outside of the \texttt{outside\_cells\_right} cells are placed outside of the
domain while the latter is still resolved as accurately as specified in the spec file. domain while the latter is still resolved as accurately as specified in the spec file.
...@@ -427,10 +427,9 @@ on the left side and 12 ranks per dimension. The mesh ...@@ -427,10 +427,9 @@ on the left side and 12 ranks per dimension. The mesh
is interesting since it can be perfectly distributed among is interesting since it can be perfectly distributed among
$2^d$, $4^d$, and $12^d$ processes. $2^d$, $4^d$, and $12^d$ processes.
The same mesh refined by a factor $3^i$, $i \leq 0$ can be constructed if $3^i \times 9$ bounding box outside cells The same mesh refined by a factor $3^i$, $i \leq 0$, is constructed by placing $3^i \times 9$ bounding box
are placed to the left of the domain. The $36^d$ mesh requires a maximum-mesh-size of cells left to the domain. The $36^d$ mesh requires a maximum-mesh-size of $\frac{1}{36} \approx 0.03$.
$\frac{1}{36} \approx 0.03$. For further uniform refinement, this mesh size must be scaled by a factor $3^{-i}$.
The uniformly refined variants must scale this mesh size with a factor $3^{-i}$.
Another family of interesting uniform meshes are the ones with $3^i \times 48^d$ cells that are shifted Another family of interesting uniform meshes are the ones with $3^i \times 48^d$ cells that are shifted
by $3^i \times 3$ cells. They can be created by choosing $\texttt{ranks\_per\_dimension}=16$ by $3^i \times 3$ cells. They can be created by choosing $\texttt{ranks\_per\_dimension}=16$
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