[FE training-materials-updates] Boot time slides: explain initramfs results

[Michael Opdenacker]

Repository : git://git.free-electrons.com/training-materials.git

On branch  : master
Link       : http://git.free-electrons.com/training-materials/commit/?id=34bcf269009b8b19efd39532042d2cb725bb93fa

>---------------------------------------------------------------

commit 34bcf269009b8b19efd39532042d2cb725bb93fa
Author: Michael Opdenacker <michael.opdenacker at free-electrons.com>
Date:   Wed Jan 1 07:19:15 2014 +0100

    Boot time slides: explain initramfs results
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at free-electrons.com>


>---------------------------------------------------------------

34bcf269009b8b19efd39532042d2cb725bb93fa
 .../boottime-init-scripts3.tex                     |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/slides/boottime-init-scripts3/boottime-init-scripts3.tex b/slides/boottime-init-scripts3/boottime-init-scripts3.tex
index 126d5f6..9c9ac93 100644
--- a/slides/boottime-init-scripts3/boottime-init-scripts3.tex
+++ b/slides/boottime-init-scripts3/boottime-init-scripts3.tex
@@ -43,7 +43,7 @@ application and then switch to the final root filesystem with
 \end{frame}
 
 \begin{frame}
-\frametitle{Results}
+\frametitle{Results: after switch to initramfs}
 Before: 9.67s
 \begin{center}
     \includegraphics[width=\textwidth]{slides/boottime-init-scripts/timechart-init.pdf}
@@ -53,6 +53,11 @@ After:
     \includegraphics[width=\textwidth]{slides/boottime-init-scripts3/timechart-initramfs.pdf}
 \end{center}
 Total: 8.54s.
+\begin{itemize}
+\item U-Boot takes more time because the kernel is bigger
+\item \code{init} is started earlier because UBI is not initialized yet
+      (slow, UBIFS root filesystem)
+\end{itemize}
 \end{frame}
 
 \setuplabframe