From: afanfakh <afanfakh@fanfakh.afanfakh>
Date: Wed, 30 Sep 2015 14:04:46 +0000 (+0200)
Subject: adding power senarios section
X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/mpi-energy2.git/commitdiff_plain/b4f045bac56831537abd93cb4ee5bc570e53fe3b

adding power senarios section
---

diff --git a/mpi-energy2-extension/Heter_paper.tex b/mpi-energy2-extension/Heter_paper.tex
index d6ff46f..b2c2c21 100644
--- a/mpi-energy2-extension/Heter_paper.tex
+++ b/mpi-energy2-extension/Heter_paper.tex
@@ -842,6 +842,9 @@ which on average is up 26\%.  Therefore, the tradeoff distance is related linear
 percentage. Finally, the best energy and performance tradeoff depends on the all of the following:
 1) the computations to communications ratio when there is a communications and slack times, 2) the differences in computing powers 
 between the computing nodes and 3) the differences in static and the dynamic powers of the nodes.}
+
+
+
 \subsection{The experimental results of multicores clusters}
 \label{sec.res-mc}
 The grid'5000 clusters have different number of cores embedded in their nodes
@@ -994,17 +997,107 @@ Scenario name                          & Cluster name & \begin{tabular}[c]{@{}c@
   \label{fig:dist-mc}
 \end{figure}
 
-\subsection{The results for different power consumption scenarios}
-\label{sec.compare}
+\subsection{The results of using different static power consumption scenarios}
+\label{sec.pow_sen}
+The static power consumption for one core of the computing node is the leakage power
+consumption when this core is in the idle state. The node's idle state power value that measured 
+as in section \ref{sec.grid5000} had many power consumptions embedded  such as 
+all cores static powers in addition to the power consumption of the other devices. So, the static power for one core 
+can't measured precisely. On the other hand, while the static power consumption of
+one core representing the core's power when there is no any computation,  thus 
+the majority of ratio of the total power consumption is depends on the dynamic power consumption. 
+Despite that, the static power consumption is becomes more important  when the execution time 
+increased using DVFS. Therefore, the objective of this section is to verify the ability of the proposed 
+frequencies selecting algorithm when the static power consumption is changed. 
+
+All the results obtained in the previous sections depend on the measured dynamic power 
+consumptions as in table \ref{table:grid5000}. Moreover, the static power consumption is assumed for
+one core represents  20\% of the measured dynamic power of that core. 
+This assumption is extended in this section to taking into account others ratios for the static power consumption.
+In addition to the previous ratio of the static power consumption, two other scenarios are used which 
+all of these scenarios can be denoted as follow: 
+\begin{itemize}
+\item 10\% of static power scenario 
+\item 20\% of static power scenario 
+\item 30\% of static power scenario 
+\end{itemize}
+
+These three scenarios represented the ratio of the static power consumption that can be computed from 
+the dynamic power consumption of the core. The NAS benchmarks of class D are executed over 16 nodes
+in the Nancy site using three clusters: Graphite, Graphene and Griffon. As same as used before, the one site 16 nodes
+platform scenario explained in the last experiments, as in table \ref{tab:sc}, is uses to run 
+the NAS benchmarks with these static power scenarios. 
+
+ \begin{figure}
+  \centering
+  \includegraphics[scale=0.5]{fig/eng_pow.eps}
+  \caption{The energy saving percentages for NAS benchmarks of the three power scenario}
+  \label{fig:eng-pow}
+\end{figure}
+
+\begin{figure}
+  \centering
+  \includegraphics[scale=0.5]{fig/per_pow.eps}
+  \caption{The performance degradation percentages for NAS benchmarks of the three power scenario}
+  \label{fig:per-pow}
+\end{figure}
 
 
+\begin{figure}
+  \centering
+  \includegraphics[scale=0.5]{fig/dist_pow.eps}
+  \caption{The tradeoff distance for NAS benchmarks of the three power scenario}
+  \label{fig:dist-pow}
+\end{figure}
 
+\begin{figure}
+  \centering
+  \includegraphics[scale=0.47]{fig/three_scenarios.pdf}
+  \caption{Comparing the selected frequencies of MG benchmarks for three static power scenarios}
+  \label{fig:fre-pow}
+\end{figure}
 
-\subsection{The comparison of the proposed scaling algorithm }
+The energy saving percentages of NAS benchmarks with these three static power scenarios are presented 
+in figure \ref{fig:eng_sen}. This figure showed the 10\% of static power scenario 
+gives the biggest energy saving percentage comparing to 20\% and 30\% static power 
+scenario. When using smaller ratio of static power consumption, the proposed 
+frequencies selecting algorithm selects smaller frequencies, bigger scaling factors, 
+because the static energy consumption not increased significantly the overall energy 
+consumption. Therefore, more energy reduction can be achieved  when the frequencies are scaled down.
+For example figure \ref{fig:fre-pow}, illustrated that the proposed algorithm  
+proportionally scaled down the new computed frequencies with the overall predicted energy 
+consumption. The results of 30\% static power scenario gives the smallest energy saving percentages 
+because the new selected frequencies produced smaller ratio in the reduced energy consumption. 
+Furthermore, The proposed algorithm tries to limit selecting smaller frequencies that increased 
+the static energy consumption if the static power consumption is increased.
+The performance degradation percentages are presented in the figure \ref{fig:per-pow},
+the 30\% of static power scenario had less performance degradation percentage, because
+bigger frequencies was selected due to the big ratio in the static power consumption.
+The inverse was happens in the 20\% and 30\% scenario, the algorithm was selected 
+biggest frequencies, smaller scaling factors, according to this increased in the static power ratios.
+The tradoff distance for the NAS benchmarks with these three static powers scenarios 
+are presented in the figure \ref{fig:dist}. The results showed that the tradeoff
+distance is the best when the  10\% of static power scenario is used, and this percentage 
+is decreased for the other two scenarios propositionally to their static power ratios.
+In EP benchmarks, the results of energy saving, performance degradation and tradeoff 
+distance are showed small differences when the these static power scenarios were used, 
+because this benchmark not has communications. The proposed algorithm is selected 
+same frequencies in this benchmark when all these static power scenarios are used. 
+The small differences in the results are due to the static power is consumed during the computation 
+times side by side to the dynamic power consumption, knowing that the dynamic power consumption 
+representing the highest ratio in the total power consumption of the core, then any change in 
+the static power during these times have less affect on the overall energy consumption. While the 
+inverse was happens for the rest of the benchmarks which have the communications 
+that increased the static energy consumption linearly to the mount of communications 
+in these benchmarks.
+
+ 
+
+\subsection{The comparison of the proposed frequencies selecting algorithm }
 \label{sec.compare_EDP}
 
 
-
+  
 \section{Conclusion}
 \label{sec.concl}
 
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