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-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
- "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
-
-<book id="Tracepoints">
- <bookinfo>
- <title>The Linux Kernel Tracepoint API</title>
-
- <authorgroup>
- <author>
- <firstname>Jason</firstname>
- <surname>Baron</surname>
- <affiliation>
- <address>
- <email>jbaron@redhat.com</email>
- </address>
- </affiliation>
- </author>
- <author>
- <firstname>William</firstname>
- <surname>Cohen</surname>
- <affiliation>
- <address>
- <email>wcohen@redhat.com</email>
- </address>
- </affiliation>
- </author>
- </authorgroup>
-
- <legalnotice>
- <para>
- This documentation is free software; you can redistribute
- it and/or modify it under the terms of the GNU General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later
- version.
- </para>
-
- <para>
- This program is distributed in the hope that it will be
- useful, but WITHOUT ANY WARRANTY; without even the implied
- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- See the GNU General Public License for more details.
- </para>
-
- <para>
- You should have received a copy of the GNU General Public
- License along with this program; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- MA 02111-1307 USA
- </para>
-
- <para>
- For more details see the file COPYING in the source
- distribution of Linux.
- </para>
- </legalnotice>
- </bookinfo>
-
- <toc></toc>
- <chapter id="intro">
- <title>Introduction</title>
- <para>
- Tracepoints are static probe points that are located in strategic points
- throughout the kernel. 'Probes' register/unregister with tracepoints
- via a callback mechanism. The 'probes' are strictly typed functions that
- are passed a unique set of parameters defined by each tracepoint.
- </para>
-
- <para>
- From this simple callback mechanism, 'probes' can be used to profile, debug,
- and understand kernel behavior. There are a number of tools that provide a
- framework for using 'probes'. These tools include Systemtap, ftrace, and
- LTTng.
- </para>
-
- <para>
- Tracepoints are defined in a number of header files via various macros. Thus,
- the purpose of this document is to provide a clear accounting of the available
- tracepoints. The intention is to understand not only what tracepoints are
- available but also to understand where future tracepoints might be added.
- </para>
-
- <para>
- The API presented has functions of the form:
- <function>trace_tracepointname(function parameters)</function>. These are the
- tracepoints callbacks that are found throughout the code. Registering and
- unregistering probes with these callback sites is covered in the
- <filename>Documentation/trace/*</filename> directory.
- </para>
- </chapter>
-
- <chapter id="irq">
- <title>IRQ</title>
-!Iinclude/trace/events/irq.h
- </chapter>
-
- <chapter id="signal">
- <title>SIGNAL</title>
-!Iinclude/trace/events/signal.h
- </chapter>
-
- <chapter id="block">
- <title>Block IO</title>
-!Iinclude/trace/events/block.h
- </chapter>
-
- <chapter id="workqueue">
- <title>Workqueue</title>
-!Iinclude/trace/events/workqueue.h
- </chapter>
-</book>