\vspace{2cm}
\title{ \textbf{Energy Consumption Optimization of Parallel Applications with Iterations using CPU Frequency Scaling} \\ \vspace{0.2cm} \hspace{1.8cm}\textbf{\textcolor{cyan}{\small PhD Dissertation Defense}}}\vspace{-1cm}
-\author{ \textbf{Ahmed Badri Muslim Fanfakh} \\ \vspace{0.5cm}\small Under Supervision: \textcolor{cyan}{\small Raphaël COUTURIER and Jean-Claude CHARR} \\\vspace{0.1cm} \textcolor{blue}{ University of Franche-Comté - FEMTO-ST - DISC Dept. - AND Team} \\ ~~~~~~~~~~~~~~~~~~~~~ \textbf{\textcolor{blue}{ 17 October 2016 }}}
+\author{ \textbf{Ahmed Badri Muslim Fanfakh} \\ \vspace{0.5cm}\small Under Supervision: \textcolor{cyan}{\small Raphaël COUTURIER and Jean-Claude CHARR} \\\vspace{0.1cm} \textcolor{blue}{ University of Bourgogne Franche-Comté - FEMTO-ST - DISC Dept. - AND Team} \\ ~~~~~~~~~~~~~~~~~~~~~ \textbf{\textcolor{blue}{ 17 October 2016 }}}
\date{}
\vspace{-3cm}
%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Introduction and problem definition}
\section{\small {Introduction and Problem definition}}
- \bf \textcolor{blue}{Approaches to increase the computing power:}
+ \bf \textcolor{blue}{Approaches to increase the computing power of the parallel platform :}
\begin{minipage}{0.5\textwidth}
- \textcolor{blue}{1)} \small \bf \textcolor{black}{Increasing the frequency of a processor}
+ \textcolor{blue}{1)} \small \bf \textcolor{black}{Increasing the frequency of a processor.}
\end{minipage}%
\begin{minipage}{0.6\textwidth}
\end{minipage}%
\vspace{0.2cm}
\begin{minipage}{0.5\textwidth}
- \textcolor{blue}{2)} \small \bf \textcolor{black}{Increasing the number of nodes}
+ \textcolor{blue}{2)} \small \bf \textcolor{black}{Increasing the number of nodes.}
+
+ \tiny \textcolor{blue}{Recently, Tianhe-2 supercomputer had more than 3 million cores while consuming around 17.8 megawatts.}
+
\end{minipage}%
\begin{minipage}{0.6\textwidth}
\begin{figure}[h!]
\vspace{-0.9cm}
\begin{figure}
\animategraphics[autopause,loop,controls,scale=0.25,buttonsize=0.2cm]{200}{on-off/a-}{0}{69}
+ %\includegraphics[width=0.6\textwidth]{on-off/a-69}
\end{figure}
\end{frame}
\textcolor{blue}{2)} \bf \textcolor{black}{Dynamic voltage and frequency Scaling (DVFS)}
\vspace{-0.5cm}
\begin{figure}
- \animategraphics[autopause,controls,scale=0.25,buttonsize=0.2cm]{10}{DVFS-meq/a-}{0}{109}
+ \animategraphics[autopause,controls,scale=0.25,buttonsize=0.2cm]{10}{DVFS-meq/a-}{0}{109}
+ %\includegraphics[width=0.6\textwidth]{DVFS-meq/a-109}
\end{figure}
\end{frame}
\begin{minipage}{0.5\textwidth}
\vspace{-0.49cm}
\begin{itemize}
- \item \small \textcolor{black}{The biggest power consumption is consumed by a processor \textsuperscript{1}. }
+ \item \small \textcolor{black}{The biggest power consumption is consumed by the processor \textsuperscript{1}. }
\end{itemize}
\end{figure}
\end{minipage}%
- \begin{itemize} \item \small \textcolor{black}{It used to reduce the energy consumption while keeping all the node working, thus it is more adapted to parallel computing.}
+ \begin{itemize} \item \small \textcolor{black}{It uses to reduce the energy consumption while keeping all the nodes working, thus it is more adapted to parallel computing.}
\item \small \textcolor{black}{It has a very small overhead compared to switching-off the idle nodes method.} \end{itemize}
\vspace{-0.12cm}
\small \textcolor{blue}{Challenge:} \textcolor{black}{DVFS is used to reduce the energy consumption, \textcolor{blue}{but} it degrades the performance simultaneously.}
\vspace{0.1cm}
- \small \textcolor{blue}{Objective:} \textcolor{black}{Applying the DVFS to minimize the energy consumption while maintaining the performance of the parallel applications.}
+ \small \textcolor{blue}{Objective:} \textcolor{black}{Applying the DVFS to minimize the energy consumption while maintaining the performance of the parallel application.}
\end{block}
\tiny \textsuperscript{1} Fan, X., Weber, W., and Barroso, L. A. 2007. Power provisioning
\begin{figure}
\animategraphics[autopause,controls,scale=0.28,buttonsize=0.2cm]{10}{dvfs-homo/a-}{0}{159}
-
+ %\includegraphics[width=0.6\textwidth]{dvfs-homo/a-159}
\end{figure}
\end{frame}
\begin{femtoBlock}{}
\begin{itemize}
\small
- \item The experiments are executed on the simulator SimGrid/SMPI v3.10.\medskip
- \item The proposed algorithm is applied to the NAS parallel benchmarks.\medskip
+ \item The experiments were executed on the simulator SimGrid/SMPI v3.10.\medskip
+ \item The proposed algorithm was applied to the NAS parallel benchmarks.\medskip
\item Each node in the cluster has 18 frequency values from \textbf{2.5$GHz$} to \textbf{800$MHz$}.\medskip
\item The proposed algorithm was evaluated over the A, B, C classes of the benchmarks using 4, 8 or 9 and 16 nodes respectively. \medskip
\item $P_d=20W$, $P_s=4W$.
\vspace{-0.75cm}
\begin{figure}
\animategraphics[autopause,controls,scale=0.28,buttonsize=0.2cm]{10}{homo-model/a-}{0}{356}
+ %\includegraphics[width=0.6\textwidth]{homo-model/a-356}
\end{figure}
\end{frame}
\begin{center}
-\bf \Large \textcolor{blue}{Energy optimization of a parallel application with iterations running over Heterogeneous platform}
+\bf \Large \textcolor{blue}{Energy optimization of a parallel application with iterations running over a Heterogeneous platform}
\end{center}
\end{frame}
\vspace{-0.5cm}
\begin{figure}
\animategraphics[autopause,controls,scale=0.28,buttonsize=0.2cm]{10}{heter-model/a-}{0}{272}
+ %\includegraphics[width=0.6\textwidth]{heter-model/a-272}
\end{figure}
\end{frame}
\begin{figure}
\animategraphics[autopause,controls,scale=0.28,buttonsize=0.2cm]{10}{dvfs-heter/a-}{0}{650}
+ % \includegraphics[width=0.6\textwidth]{dvfs-heter/a-650}
\end{figure}
\end{frame}
\includegraphics[width=0.8\textwidth]{c2/energy_saving.pdf}
\textcolor{blue}{On average, it reduces the energy consumption by \textcolor{red}{29\%}
- for the class C of the NAS benchmarks executed over 8 nodes}
+ for the class C of the NAS Benchmarks executed over 8 nodes}
\end{figure}
\end{frame}
\includegraphics[width=.8\textwidth]{c2/perf_degra.pdf}
\textcolor{blue}{On average, it degrades by \textcolor{red}{3.8\%} the performance
- of NAS benchmarks class C executed over 8 nodes}
+ of NAS Benchmarks class C executed over 8 nodes}
\end{figure}
\end{frame}
\begin{frame}{Contribution}
\section{\small {Energy optimization of asynchronous applications}}
\begin{center}
-\bf \Large \textcolor{blue}{Energy optimization of asynchronous message passing iterative applications}
+\bf \Large \textcolor{blue}{Energy optimization of asynchronous iterative message passing applications}
\end{center}
\end{frame}
\textcolor{blue}{The execution of a synchronous parallel iterative application over a grid }
\vspace{-8 mm}
\begin{figure}
- \animategraphics[autopause,controls,scale=0.25,buttonsize=0.2cm]{10}{syn/a-}{0}{503}
+ \animategraphics[autopause,controls,scale=0.25,buttonsize=0.2cm]{10}{syn/a-}{0}{503}
+ %\includegraphics[width=0.6\textwidth]{syn/a-503}
\end{figure}
\end{frame}
\textcolor{blue}{The execution of an asynchronous parallel iterative application over a grid }
\vspace{-8 mm}
\begin{figure}
- \animategraphics[autopause,controls,scale=0.25,buttonsize=0.2cm]{10}{asyn/a-}{0}{440}
+ \animategraphics[autopause,controls,scale=0.25,buttonsize=0.2cm]{10}{asyn/a-}{0}{440}
+ %\includegraphics[width=0.6\textwidth]{asyn/a-440}
\end{figure}
\end{frame}
\vspace{-8 mm}
\begin{figure}
\animategraphics[autopause,controls,scale=0.25,buttonsize=0.2cm]{10}{asyn+dvfs/a-}{0}{314}
+ %\includegraphics[width=0.6\textwidth]{asyn+dvfs/a-314}
\end{figure}
\end{frame}
-\small \barrow \textcolor{blue}{A new objective function} was proposed to optimize both the energy consumption and the performance.
+\small \barrow \textcolor{blue}{A new objective function} to optimize both the energy consumption and the performance was proposed.
\small \barrow \textcolor{blue}{New online frequency selecting algorithms} for clusters and grids were developed.
