Merge branch 'master' of github.com:studouglas/GEANT4-GPU

Documentation/FinalPresentation/Presentation.tex

@@ -91,6 +91,32 @@ \subsection{Scope}
 \end{itemize}
 \end{frame}
 
+\begin{frame}
+\frametitle{Possible Implementations}
+There were initially five possible implementations to reach 
+a solution:
+\begin{itemize}
+\item Port Geant4 to the GPU such that each particle runs in parallel
+\item Port all the functions of some class(es) to the GPU, with those functions privatized to the GPU
+\item Port some functions of some class(es) to the GPU, memory stored on host, passing mem to device as necessary
+\item Port some functions of some class(es) to the GPU, memory stored and updated on host and device
+\item Port some functions of some class(es) to the GPU, data divided between host and device, passing mem as necessary
+\end{itemize}
+\end{frame}
+
+\begin{frame}
+\frametitle{Solution Choice}
+\begin{itemize}
+\item Implementation 1 was believed to be unreasonable given schedule/resource limitations
+\item Implementation 5 was found to be most suitable
+\begin{itemize}
+\item Easy to switch between CPU & GPU versions
+\item Less memory usage than other implementations
+\item Least redundancy in computation
+\end{itemize}
+\end{itemize}
+\end{frame}
+
 \subsection{Purpose}
 \begin{frame}
 \begin{itemize}
@@ -466,7 +492,7 @@ \subsection{Accuracy / Testing}
 \frametitle{Accuracy}
 \begin{itemize}
 \item All modified functions except SampleLin and Sample
-yield results that precisely match 
+yield results that precisely match original implementations
 \end{itemize}
 \begin{itemize}
 \item Some functions fell extremely close in accuracy to 
@@ -565,6 +591,25 @@ \subsection{Summary of Results}
 \subsection{Recommendations}
 \begin{frame}
 \frametitle{Recommendations}
+For further work with regards to ParticleHPVector:
+\begin{itemize}
+\item Abstact further up the Geant4 system, parallelizing 
+components that make reference to NeutronHPVector
+\item This will decrease the frequency of data transfer 
+between the host and device
+\item Up-to-date work can be found on out github, along 
+with instructions for installing and testing
+\end{itemize}
+For further work with regards to parallelizing Geant4:
+\begin{itemize}
+\item Try parallelizing other commonly use components in similar style
+\begin{itemize}
+\item Look for classes manipulating list-style data structures
+\item Classes with functions that have nested loops or are heavy in computation are prime candidates
+\item Probabilistic functions and getter/setter functions won't benefit greatly
+\item Functions with conditional branching may cause bottlenecks in parallelization
+\end{itemize}
+\end{itemize}
 \end{frame}
 
 \end{document}