[FE training-materials-updates] Boot time timecharts: clarify what's measured
Michael Opdenacker
michael.opdenacker at free-electrons.com
Fri May 2 01:15:09 CEST 2014
Repository : git://git.free-electrons.com/training-materials.git
On branch : master
Link : http://git.free-electrons.com/training-materials/commit/?id=578b7433bf7663484c0946463c089d20a690ebd0
>---------------------------------------------------------------
commit 578b7433bf7663484c0946463c089d20a690ebd0
Author: Michael Opdenacker <michael.opdenacker at free-electrons.com>
Date: Mon Apr 28 21:12:27 2014 +0200
Boot time timecharts: clarify what's measured
Signed-off-by: Michael Opdenacker <michael.opdenacker at free-electrons.com>
>---------------------------------------------------------------
578b7433bf7663484c0946463c089d20a690ebd0
slides/boottime-bootloader/boottime-bootloader.tex | 17 ++---
slides/boottime-bootloader/timechart-at91.dia | 68 ++++++++++++++++++-
.../timechart-barebox-final.dia | 66 ++++++++++++++++++
.../boottime-bootloader/timechart-barebox-lzo.dia | 66 ++++++++++++++++++
slides/boottime-bootloader/timechart-barebox.dia | 66 ++++++++++++++++++
slides/boottime-bootloader/timechart-kernel.dia | 66 ++++++++++++++----
.../boottime-init-scripts.tex | 1 -
slides/boottime-init-scripts/timechart-init.dia | 66 ++++++++++++++++++
.../boottime-init-scripts3.tex | 3 +-
.../boottime-init-scripts3/timechart-initramfs.dia | 66 ++++++++++++++++++
slides/boottime-kernel/boottime-kernel.tex | 11 ++-
slides/boottime-kernel/timechart-final.dia | 68 ++++++++++++++++++-
slides/boottime-kernel/timechart-lzo.dia | 70 +++++++++++++++++++-
slides/boottime-kernel/timechart-modules.dia | 66 ++++++++++++++++++
14 files changed, 662 insertions(+), 38 deletions(-)
diff --git a/slides/boottime-bootloader/boottime-bootloader.tex b/slides/boottime-bootloader/boottime-bootloader.tex
index febb1ab..82fc8af 100644
--- a/slides/boottime-bootloader/boottime-bootloader.tex
+++ b/slides/boottime-bootloader/boottime-bootloader.tex
@@ -134,7 +134,6 @@ Measured between \code{Booting kernel} and \code{Starting kernel ...}
\begin{frame}
\frametitle{Switching from U-Boot to Barebox}
Results with the SAMA5D3x-EK board \\
-Before: 5.77s
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-kernel/timechart-final.pdf}
\end{center}
@@ -142,13 +141,12 @@ After:
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-bootloader/timechart-barebox.pdf}
\end{center}
-Total: 4.67s.
\end{frame}
\begin{frame}
\frametitle{Compression}
-Let's try LZO compression for the kernel again:
-Before (gzip): 4.67s
+Let's try LZO compression for the kernel again:\\
+Before (gzip)
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-bootloader/timechart-barebox.pdf}
\end{center}
@@ -156,7 +154,6 @@ After (LZO):
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-bootloader/timechart-barebox-lzo.pdf}
\end{center}
-Total: 4.59s.
\end{frame}
\begin{frame}[fragile]
@@ -178,7 +175,7 @@ fi
\begin{frame}
\frametitle{Results}
-Before: 4.59s
+Before:
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-bootloader/timechart-barebox-lzo.pdf}
\end{center}
@@ -186,7 +183,6 @@ After:
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-bootloader/timechart-barebox-final.pdf}
\end{center}
-Total: 3.07s.
\end{frame}
\begin{frame}
@@ -202,8 +198,7 @@ removing features.
\begin{frame}
\frametitle{Results - Simplifying bootloader and kernel}
-
-Before: 3.07s
+Before:
\begin{center}
\includegraphics[width=0.8\textwidth]{slides/boottime-bootloader/timechart-barebox-final.pdf}
\end{center}
@@ -211,7 +206,6 @@ After:
\begin{center}
\includegraphics[width=0.8\textwidth]{slides/boottime-bootloader/timechart-kernel.pdf}
\end{center}
-Total: 2.57s.
\end{frame}
\subsection{Skipping the bootloader}
@@ -241,7 +235,7 @@ make
\begin{frame}
\frametitle{Removing the bootloader}
-Before: 3.07s
+Before:
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-bootloader/timechart-barebox-final.pdf}
\end{center}
@@ -249,7 +243,6 @@ Using \code{AT91bootstrap} to boot the Linux kernel:
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-bootloader/timechart-at91.pdf}
\end{center}
-Total: 3.94s.
\end{frame}
\setuplabframe
diff --git a/slides/boottime-bootloader/timechart-at91.dia b/slides/boottime-bootloader/timechart-at91.dia
index 3dcfabe..5f26306 100644
--- a/slides/boottime-bootloader/timechart-at91.dia
+++ b/slides/boottime-bootloader/timechart-at91.dia
@@ -230,7 +230,7 @@
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@@ -442,5 +442,71 @@
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diff --git a/slides/boottime-bootloader/timechart-barebox-final.dia b/slides/boottime-bootloader/timechart-barebox-final.dia
index 477c43b..66d3b6e 100644
--- a/slides/boottime-bootloader/timechart-barebox-final.dia
+++ b/slides/boottime-bootloader/timechart-barebox-final.dia
@@ -553,5 +553,71 @@
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diff --git a/slides/boottime-bootloader/timechart-barebox-lzo.dia b/slides/boottime-bootloader/timechart-barebox-lzo.dia
index e86c000..1f1cccc 100644
--- a/slides/boottime-bootloader/timechart-barebox-lzo.dia
+++ b/slides/boottime-bootloader/timechart-barebox-lzo.dia
@@ -530,5 +530,71 @@
<dia:connection handle="1" to="O3" connection="2"/>
</dia:connections>
</dia:object>
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+ <dia:attribute name="text">
+ <dia:composite type="text">
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+ <dia:string>#4.59s#</dia:string>
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+ <dia:font family="sans" style="80" name="Helvetica-Bold"/>
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+ <dia:attribute name="height">
+ <dia:real val="1.411111056804657"/>
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+ <dia:attribute name="pos">
+ <dia:point val="42.8293,21.275"/>
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diff --git a/slides/boottime-bootloader/timechart-barebox.dia b/slides/boottime-bootloader/timechart-barebox.dia
index 74994c3..6ead252 100644
--- a/slides/boottime-bootloader/timechart-barebox.dia
+++ b/slides/boottime-bootloader/timechart-barebox.dia
@@ -530,5 +530,71 @@
<dia:connection handle="1" to="O3" connection="2"/>
</dia:connections>
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+ <dia:composite type="text">
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diff --git a/slides/boottime-bootloader/timechart-kernel.dia b/slides/boottime-bootloader/timechart-kernel.dia
index 826c354..1b0ade5 100644
--- a/slides/boottime-bootloader/timechart-kernel.dia
+++ b/slides/boottime-bootloader/timechart-kernel.dia
@@ -284,7 +284,7 @@
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@@ -314,15 +314,16 @@
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</dia:attribute>
<dia:attribute name="text">
<dia:composite type="text">
<dia:attribute name="string">
- <dia:string>#Linux Kernel 1.13s#</dia:string>
+ <dia:string>#Kernel:
+1.13s#</dia:string>
</dia:attribute>
<dia:attribute name="font">
<dia:font family="sans" style="80" name="Helvetica-Bold"/>
@@ -331,7 +332,7 @@
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@@ -552,20 +553,62 @@
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+ <dia:composite type="text">
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+ <dia:string>#2.57s#</dia:string>
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</dia:attribute>
<dia:attribute name="conn_endpoints">
- <dia:point val="46,22"/>
- <dia:point val="43,20"/>
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+ <dia:point val="46.95,21.4"/>
</dia:attribute>
<dia:attribute name="numcp">
<dia:int val="1"/>
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@@ -575,9 +618,6 @@
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diff --git a/slides/boottime-init-scripts/boottime-init-scripts.tex b/slides/boottime-init-scripts/boottime-init-scripts.tex
index 5401641..9743950 100644
--- a/slides/boottime-init-scripts/boottime-init-scripts.tex
+++ b/slides/boottime-init-scripts/boottime-init-scripts.tex
@@ -103,7 +103,6 @@ After:
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-init-scripts/timechart-init.pdf}
\end{center}
-Total: 9.67s.
\end{frame}
\begin{frame}
diff --git a/slides/boottime-init-scripts/timechart-init.dia b/slides/boottime-init-scripts/timechart-init.dia
index 09629d0..bdd2652 100644
--- a/slides/boottime-init-scripts/timechart-init.dia
+++ b/slides/boottime-init-scripts/timechart-init.dia
@@ -438,5 +438,71 @@
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+ <dia:font family="sans" style="80" name="Helvetica-Bold"/>
+ </dia:attribute>
+ <dia:attribute name="height">
+ <dia:real val="1.411111056804657"/>
+ </dia:attribute>
+ <dia:attribute name="pos">
+ <dia:point val="55.1001,21.375"/>
+ </dia:attribute>
+ <dia:attribute name="color">
+ <dia:color val="#000000"/>
+ </dia:attribute>
+ <dia:attribute name="alignment">
+ <dia:enum val="0"/>
+ </dia:attribute>
+ </dia:composite>
+ </dia:attribute>
+ <dia:attribute name="valign">
+ <dia:enum val="3"/>
+ </dia:attribute>
+ </dia:object>
</dia:layer>
</dia:diagram>
diff --git a/slides/boottime-init-scripts3/boottime-init-scripts3.tex b/slides/boottime-init-scripts3/boottime-init-scripts3.tex
index a478545..60fbdd5 100644
--- a/slides/boottime-init-scripts3/boottime-init-scripts3.tex
+++ b/slides/boottime-init-scripts3/boottime-init-scripts3.tex
@@ -81,7 +81,7 @@ Initramfs compression & 3016928 & 4.1050 s & 1.760 s & 8.813 s & + 18 ms \\
\begin{frame}
\frametitle{Results: after switch to initramfs}
-Before: 9.67s
+Before:
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-init-scripts/timechart-init.pdf}
\end{center}
@@ -89,7 +89,6 @@ After:
\begin{center}
\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
diff --git a/slides/boottime-init-scripts3/timechart-initramfs.dia b/slides/boottime-init-scripts3/timechart-initramfs.dia
index f358e21..7d796a4 100644
--- a/slides/boottime-init-scripts3/timechart-initramfs.dia
+++ b/slides/boottime-init-scripts3/timechart-initramfs.dia
@@ -528,5 +528,71 @@
<dia:connection handle="1" to="O3" connection="2"/>
</dia:connections>
</dia:object>
+ <dia:object type="Standard - Line" version="0" id="O11">
+ <dia:attribute name="obj_pos">
+ <dia:point val="33.0522,21.6"/>
+ </dia:attribute>
+ <dia:attribute name="obj_bb">
+ <dia:rectangle val="33.0021,21.2391;75.1002,22.0109"/>
+ </dia:attribute>
+ <dia:attribute name="conn_endpoints">
+ <dia:point val="33.0522,21.6"/>
+ <dia:point val="75.0501,21.65"/>
+ </dia:attribute>
+ <dia:attribute name="numcp">
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+ <dia:attribute name="start_arrow">
+ <dia:enum val="22"/>
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+ <dia:attribute name="start_arrow_length">
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+ </dia:attribute>
+ <dia:attribute name="start_arrow_width">
+ <dia:real val="0.5"/>
+ </dia:attribute>
+ <dia:attribute name="end_arrow">
+ <dia:enum val="22"/>
+ </dia:attribute>
+ <dia:attribute name="end_arrow_length">
+ <dia:real val="0.5"/>
+ </dia:attribute>
+ <dia:attribute name="end_arrow_width">
+ <dia:real val="0.5"/>
+ </dia:attribute>
+ </dia:object>
+ <dia:object type="Standard - Text" version="1" id="O12">
+ <dia:attribute name="obj_pos">
+ <dia:point val="51.7022,21.275"/>
+ </dia:attribute>
+ <dia:attribute name="obj_bb">
+ <dia:rectangle val="51.7022,20.225;55.1597,21.5425"/>
+ </dia:attribute>
+ <dia:attribute name="text">
+ <dia:composite type="text">
+ <dia:attribute name="string">
+ <dia:string>#8.54s#</dia:string>
+ </dia:attribute>
+ <dia:attribute name="font">
+ <dia:font family="sans" style="80" name="Helvetica-Bold"/>
+ </dia:attribute>
+ <dia:attribute name="height">
+ <dia:real val="1.411111056804657"/>
+ </dia:attribute>
+ <dia:attribute name="pos">
+ <dia:point val="51.7022,21.275"/>
+ </dia:attribute>
+ <dia:attribute name="color">
+ <dia:color val="#000000"/>
+ </dia:attribute>
+ <dia:attribute name="alignment">
+ <dia:enum val="0"/>
+ </dia:attribute>
+ </dia:composite>
+ </dia:attribute>
+ <dia:attribute name="valign">
+ <dia:enum val="3"/>
+ </dia:attribute>
+ </dia:object>
</dia:layer>
</dia:diagram>
diff --git a/slides/boottime-kernel/boottime-kernel.tex b/slides/boottime-kernel/boottime-kernel.tex
index 65b5148..5807548 100644
--- a/slides/boottime-kernel/boottime-kernel.tex
+++ b/slides/boottime-kernel/boottime-kernel.tex
@@ -101,7 +101,7 @@ First, we focus on reducing the size without removing features
\begin{frame}
\frametitle{Results}
-Before 8.54s
+Before:
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-init-scripts3/timechart-initramfs.pdf}
\end{center}
@@ -109,16 +109,16 @@ After:
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-kernel/timechart-modules.pdf}
\end{center}
-Total: 6.45s.
\end{frame}
\begin{frame}
\frametitle{Kernel Compression}
+\small
Depending on the balance between your storage reading speed and your
CPU power to decompress the kernel, you will need to benchmark
different compression algorithms.
-Before (gzip): 6.45s.
+Before (gzip):
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-kernel/timechart-modules.pdf}
\end{center}
@@ -126,7 +126,6 @@ After (LZO):
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-kernel/timechart-lzo.pdf}
\end{center}
-Total: 6.46s.
Conclusion: don't use LZO for now.
\end{frame}
@@ -225,7 +224,7 @@ Calibrating delay loop (skipped) preset value.. 262.96 BogoMIPS (lpj=1314816)
\begin{frame}
\frametitle{Kernel Optimization results}
-Before (gzip): 6.45s.
+Before (gzip)
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-kernel/timechart-modules.pdf}
\end{center}
@@ -233,7 +232,7 @@ After:
\begin{center}
\includegraphics[width=\textwidth]{slides/boottime-kernel/timechart-final.pdf}
\end{center}
-Total: 5.77s. Without losing any functionality!
+Without losing any functionality!
\end{frame}
\begin{frame}
diff --git a/slides/boottime-kernel/timechart-final.dia b/slides/boottime-kernel/timechart-final.dia
index 5ad4b46..85edcd0 100644
--- a/slides/boottime-kernel/timechart-final.dia
+++ b/slides/boottime-kernel/timechart-final.dia
@@ -317,7 +317,7 @@
<dia:point val="57,17.1692"/>
</dia:attribute>
<dia:attribute name="obj_bb">
- <dia:rectangle val="53.0174,16.0863;61.0155,18.9137"/>
+ <dia:rectangle val="53.0174,16.1192;60.9826,18.8478"/>
</dia:attribute>
<dia:attribute name="text">
<dia:composite type="text">
@@ -529,5 +529,71 @@
<dia:connection handle="1" to="O3" connection="2"/>
</dia:connections>
</dia:object>
+ <dia:object type="Standard - Line" version="0" id="O11">
+ <dia:attribute name="obj_pos">
+ <dia:point val="33,21.85"/>
+ </dia:attribute>
+ <dia:attribute name="obj_bb">
+ <dia:rectangle val="32.95,21.4882;62.1005,22.2118"/>
+ </dia:attribute>
+ <dia:attribute name="conn_endpoints">
+ <dia:point val="33,21.85"/>
+ <dia:point val="62.0505,21.85"/>
+ </dia:attribute>
+ <dia:attribute name="numcp">
+ <dia:int val="1"/>
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+ <dia:attribute name="start_arrow">
+ <dia:enum val="22"/>
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+ <dia:attribute name="start_arrow_length">
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+ <dia:attribute name="start_arrow_width">
+ <dia:real val="0.5"/>
+ </dia:attribute>
+ <dia:attribute name="end_arrow">
+ <dia:enum val="22"/>
+ </dia:attribute>
+ <dia:attribute name="end_arrow_length">
+ <dia:real val="0.5"/>
+ </dia:attribute>
+ <dia:attribute name="end_arrow_width">
+ <dia:real val="0.5"/>
+ </dia:attribute>
+ </dia:object>
+ <dia:object type="Standard - Text" version="1" id="O12">
+ <dia:attribute name="obj_pos">
+ <dia:point val="45,21.35"/>
+ </dia:attribute>
+ <dia:attribute name="obj_bb">
+ <dia:rectangle val="45,20.3;48.4575,21.6175"/>
+ </dia:attribute>
+ <dia:attribute name="text">
+ <dia:composite type="text">
+ <dia:attribute name="string">
+ <dia:string>#5.77s#</dia:string>
+ </dia:attribute>
+ <dia:attribute name="font">
+ <dia:font family="sans" style="80" name="Helvetica-Bold"/>
+ </dia:attribute>
+ <dia:attribute name="height">
+ <dia:real val="1.411111056804657"/>
+ </dia:attribute>
+ <dia:attribute name="pos">
+ <dia:point val="45,21.35"/>
+ </dia:attribute>
+ <dia:attribute name="color">
+ <dia:color val="#000000"/>
+ </dia:attribute>
+ <dia:attribute name="alignment">
+ <dia:enum val="0"/>
+ </dia:attribute>
+ </dia:composite>
+ </dia:attribute>
+ <dia:attribute name="valign">
+ <dia:enum val="3"/>
+ </dia:attribute>
+ </dia:object>
</dia:layer>
</dia:diagram>
diff --git a/slides/boottime-kernel/timechart-lzo.dia b/slides/boottime-kernel/timechart-lzo.dia
index 55807ac..e498f60 100644
--- a/slides/boottime-kernel/timechart-lzo.dia
+++ b/slides/boottime-kernel/timechart-lzo.dia
@@ -284,7 +284,7 @@
<dia:point val="41.1648,17.8912"/>
</dia:attribute>
<dia:attribute name="obj_bb">
- <dia:rectangle val="41.1648,16.8083;49.8352,18.2246"/>
+ <dia:rectangle val="41.1648,16.8412;49.8023,18.1587"/>
</dia:attribute>
<dia:attribute name="text">
<dia:composite type="text">
@@ -317,7 +317,7 @@
<dia:point val="59.5,17.1857"/>
</dia:attribute>
<dia:attribute name="obj_bb">
- <dia:rectangle val="55.2912,16.1028;63.7418,18.9302"/>
+ <dia:rectangle val="55.2912,16.1357;63.7088,18.8643"/>
</dia:attribute>
<dia:attribute name="text">
<dia:composite type="text">
@@ -529,5 +529,71 @@
<dia:connection handle="1" to="O3" connection="2"/>
</dia:connections>
</dia:object>
+ <dia:object type="Standard - Text" version="1" id="O11">
+ <dia:attribute name="obj_pos">
+ <dia:point val="48,21.2"/>
+ </dia:attribute>
+ <dia:attribute name="obj_bb">
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+ </dia:attribute>
+ <dia:attribute name="text">
+ <dia:composite type="text">
+ <dia:attribute name="string">
+ <dia:string>#6.46s#</dia:string>
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+ <dia:attribute name="height">
+ <dia:real val="1.411111056804657"/>
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+ <dia:attribute name="pos">
+ <dia:point val="48,21.2"/>
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+ <dia:attribute name="color">
+ <dia:color val="#000000"/>
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diff --git a/slides/boottime-kernel/timechart-modules.dia b/slides/boottime-kernel/timechart-modules.dia
index b80fd23..a17e17a 100644
--- a/slides/boottime-kernel/timechart-modules.dia
+++ b/slides/boottime-kernel/timechart-modules.dia
@@ -529,5 +529,71 @@
<dia:connection handle="1" to="O3" connection="2"/>
</dia:connections>
</dia:object>
+ <dia:object type="Standard - Line" version="0" id="O11">
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+ <dia:attribute name="obj_bb">
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+ <dia:attribute name="text">
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