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<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
[<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >
<chapter id='profile-manual-examples'>
<title>Real-World Examples</title>
<para>
This chapter contains real-world examples.
</para>
<section id='slow-write-speed-on-live-images'>
<title>Slow Write Speed on Live Images</title>
<para>
In one of our previous releases (denzil), users noticed that booting
off of a live image and writing to disk was noticeably slower.
This included the boot itself, especially the first one, since first
boots tend to do a significant amount of writing due to certain
post-install scripts.
</para>
<para>
The problem (and solution) was discovered by using the Yocto tracing
tools, in this case 'perf stat', 'perf script', 'perf record'
and 'perf report'.
</para>
<para>
See all the unvarnished details of how this bug was diagnosed and
solved here: Yocto Bug #3049
</para>
</section>
</chapter>
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