User: eschnett Date: 2012/03/12 09:14 AM

Modified: / ET.tex

Log: Describe all systems used in our benchmark

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File [modified]: ET.tex Delta lines: +32 -2 =================================================================== --- ET.tex 2012-03-12 04:13:58 UTC (rev 275) +++ ET.tex 2012-03-12 14:14:10 UTC (rev 276) @@ -527,9 +527,36 @@ better (the ideal scaling is a horizontal line). This demonstrates excellent scalability to up to more than 10,000 cores. Including hydrodynamics approximately doubles - calculation times without negatively influencing scalability.} + calculation times without negatively influencing scalability. + The characteristics of the systems used in this benchmark are + described in table \ref{tab:weak-scaling}.} \label{fig:weak-scaling} \end{figure} +\begin{table} + { + \small + \centering + \begin{tabular}{lll|rrr} + Name & Architecture (CPU) & Interconnect & nodes & cores/ & CPU + freq. \ + & & & & node & \\hline + Franklin (NERSC) & Cray XT4 (AMD) & SeaStar2 & 8502 & 4 & 2.3 + GHz \ + HLRB II (LRZ Munich) & SGI Altix (Itanium) & NUMAlink & 1 & 9728 + & 1.6 GHz \ + Kraken (NICS) & Cray XT5 (AMD) & SeaStar & 9408(?) & 12 & 2.6 + GHz \ + Queen Bee (LONI) & Intel cluster & InfiniBand & 668(?) & 8 & + 2.33 GHz \ + Ranger (TACC) & AMD cluster & InfiniBand & 1888 & 16 & 2.3 GHz + \ + \end{tabular} + } +\caption{Characteristics of the systems used in the benchmark figure + \ref{fig:weak-scaling}. These systems represent a wide range of HPC + architectures that were available over the past years.} +\label{tab:weak-scaling} +\end{table} Figure \ref{fig:weak-scaling} shows a weak scaling test of \texttt{Carpet}, where \texttt{McLachlan} (see section \ref{sec:Kevol} below) solves the Einstein equations evolving a Minkowski spacetime on a grid structure with @@ -2240,7 +2267,9 @@ \codename{Cartoon2D} allows fully three dimensional codes to be used in axisymmetric problems by evolving a slice in the $y=0$ plane and using the rotational symmetry to populate -ghost points off the plane (see Figure~\ref{fig:cartoon-plane}). +ghost points +\todo{ES: this is the first mention of ``ghost''} +off the plane (see Figure~\ref{fig:cartoon-plane}). \begin{figure}[htbp] \begin{center} \includegraphics[width=0.2\textwidth]{cartoon_plane} @@ -2343,6 +2372,7 @@ \caption{Grid layout created by \codename{CarpetRegrid2}. In this example we use one ghost point, one boundary point, and two buffer points + \todo{ES: this is the first (and only) mention of ``buffer points''} as well as \codename{RotatingSymmetry180}. There are two refinement levels present, a coarse one represented by big red circles and a fine one represented by small black circles. The