<li><a href="#pkglttng" name="TOCpkglttng">Create custom LTTng packages</a></li>
</ul>
+<li><a href="#section5" name="TOCsection5">Examples of LTTng use in the
+field</a></li>
+
</ul>
<hr />
<h2><a href="#TOCintro" name="intro">Introduction</a></h2>
<p>
-This document is made of four parts : the first one explains how
+This document is made of five parts : the first one explains how
to install LTTng and LTTV from sources, the second one describes the steps
to follow to trace a system and view it. The third part explains
briefly how to add a new trace point to the kernel and to user space
-applications. The fourth and last part explains how to create Debian or RPM
-packages from the LTTng and LTTV sources.
+applications. The fourth part explains how to create Debian or RPM
+packages from the LTTng and LTTV sources. The fifth and last part describes use
+of LTTng in the field.
<p>
These operations are made for installing the LTTng 0.86 tracer on a linux 2.6.X
kernel. You will also find instructions for installation of LTTV 0.12.x : the
<br>
<br>
Supported architectures :
-br>
+<br>
LTTng :<br>
+<br>
<li> x86 32/64 bits
<li> PowerPC 32 and 64 bits
<li> ARM (with limited timestamping precision, e.g. 1HZ. Need
<br>
<br>
LTTV :<br>
+<br>
<li> Intel 32/64 bits
<li> PowerPC 32 and 64 bits
<li> Possibly others. Takes care of endianness and type size difference between
<p>
Then, follow the section "Editing the system wide configuration" in section 2.
+<hr />
+<h2><a href="#TOCsection5" name="section5">Examples of LTTng use in the field</a></h2>
+<p>
+A few examples of successful LTTng users :
+<ul>
+<li> Google are deploying LTTng on their servers. They want to use it to
+ monitor their production servers (with flight recorder mode tracing)
+ and to help them solve hard to reproduce problems. They have had
+ success with such tracing approach to fix "rare disk delay" issues and
+ VM-related issues presented in this article :
+
+ * "Linux Kernel Debugging on Google-sized clusters at Ottawa Linux
+ Symposium 2007"
+ http://ltt.polymtl.ca/papers/bligh-Reprint.pdf
+
+<li> IBM Research have had problems with Commercial Scale-out applications,
+ which are being an increasing trend to split large server workloads.
+ They used LTTng successfully to solve a distributed filesystem-related
+ issue. It's presented in the same paper above.
+
+<li> Autodesk, in the development of their next-generation of Linux
+ audio/video edition applications, used LTTng extensively to solve
+ soft real-time issues they had. Also presented in the same paper.
+
+<li> Wind River included LTTng in their Linux distribution so their
+ clients, already familiar to Wind River own tracing solution in
+ VxWorks, car have the same kind of feature they have relied on for a
+ long time.
+
+<li> Montavista have integrated LTTng in their distribution for the same
+ reasons. It's used by Sony amongst others.
+
+<li> SuSE are currently integrating LTTng in their next SLES distribution,
+ because their clients asking for solutions which supports a kernel
+ closer to real-time need such tools to debug their problems.
+
+<li> A project between Ericsson, the Canadian Defense, NSERC and various
+ universities is just starting. It aims at monitoring and debugging
+ multi-core systems and provide automated and help user system behavior
+ analysis.
+
+<li> Siemens have been using LTTng internally for quite some time now.
+</ul>
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