IoT & Hardware
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You're reading from  Embedded Linux Projects Using Yocto Project Cookbook

Product typeBook
Published inMar 2015
Publisher
ISBN-139781784395186
Edition1st Edition
Tools
Yocto Project
Concepts
Embedded Systems
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Author (1)
Alex Gonzalez
Alex Gonzalez
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Alex Gonzalez

Alex González is a software engineering supervisor at Digi International and product owner of the Digi Embedded Yocto distribution. He started working professionally with embedded systems in 1999 and the Linux kernel in 2004, designing products for voice and video over IP networks, and followed his interests into machine-to-machine (M2M) technologies and the Internet of Things. Born and raised in Bilbao, Spain, Alex has an electronic engineering degree from the University of the Basque Country and he received his MSc in communication systems from the University of Portsmouth.
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Using LTTng

LTTng is a set of dual licensed GPLv2 and LGPL tracing and profiling tools for both applications and kernel. It produces binary trace files in the production optimized Compact Trace Format (CTF), which can then be analyzed by tools, such as babeltrace.

Getting ready

To include the different LTTng tools in your system, add the following to your conf/local.conf file:

IMAGE_INSTALL_append = " lttng-tools lttng-modules lttng-ust"

They are also part of the tools-profile image feature, so you can also add them with:

EXTRA_IMAGE_FEATURES += "tools-profile"

These are also included in the -sdk images.

Tip

At the time of writing, Yocto 1.7 excludes lttng-modules from the tools-profile feature and sdk images for ARM; so they have to be added manually.

The LTTng command-line tool is the main user interface to LTTng. It can be used to trace both the Linux kernel—using the kernel tracing interfaces we have seen in previous recipes—as well as instrumented user space applications.

How to do it...

A kernel...

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Embedded Linux Projects Using Yocto Project Cookbook
Published in: Mar 2015Publisher: ISBN-13: 9781784395186
© 2015 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Alex Gonzalez

Alex González is a software engineering supervisor at Digi International and product owner of the Digi Embedded Yocto distribution. He started working professionally with embedded systems in 1999 and the Linux kernel in 2004, designing products for voice and video over IP networks, and followed his interests into machine-to-machine (M2M) technologies and the Internet of Things. Born and raised in Bilbao, Spain, Alex has an electronic engineering degree from the University of the Basque Country and he received his MSc in communication systems from the University of Portsmouth.
Read more about Alex Gonzalez

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