commit 753d84c9bc8b24ca9f9f20b42569eaaf6b09f6c2
parent 9e7afbf5909abe3792d649d9a533fc70db1a0a2f
Author: Ivan Gankevich <igankevich@ya.ru>
Date: Thu, 28 Mar 2019 15:56:31 +0300
Discuss ship hull size.
Diffstat:
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/main.tex b/main.tex
@@ -498,14 +498,15 @@ with high frame rate and small simulation time steps.
\item Usage of graphical accelerator increases time needed to synchronise
simulation step with the visualisation frame (\textit{exchange} stage
in fig.~\ref{fig:histogram}).
-
+
\end{itemize}
\begin{table}
\centering
- \caption{Best median performance for each workstation (sphere). Here \(t\)
- is simulation step computation time, \(m\)~--- no. of simulation steps per
- second (SSPS), and \(n\)~--- the number of OpenMP threads.\label{tab:best}}
+ \caption{Best median performance for each workstation and each ship hull.
+ Here \(t\) is simulation step computation time, \(m\)~--- no. of simulation
+ steps per second (SSPS), and \(n\)~--- the number of OpenMP
+ threads.\label{tab:best}}
\begin{tabular}{lrrrlrrrlrrrl}
\toprule
& \multicolumn{4}{c}{Sphere}
@@ -577,6 +578,14 @@ particular dangerous situation (e.g.~large roll angle) and try to prevent it by
notifying ship's crew and an operator on the coast. This is one of the topics
of future work.
+Overall performance depends on the size of the ship rather than the number of
+panels. MICW hull has less number of panels than Aurora, but larger size and
+exactly two times worse performance (tab.~\ref{tab:best}). The size of the hull
+affects the size of the grid in each point of which velocity potential and then
+pressure is computed. These routines are much more compute intensive in
+comparison to wetted surface determination and pressure force computation
+(performance of which depends on the number of panels).
+
Despite the fact that Capybara has the highest floating-point performanace
across all workstations in the benchmarks, Virtual testbed runs faster on its
processor, not the graphical accelerator. Routine-by-routine investigation
