9ee1983c9a
Document irqs for the newly created docbook. [ Impact: add documentation ] Signed-off-by: Jason Baron <jbaron@redhat.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: akpm@linux-foundation.org Cc: rostedt@goodmis.org Cc: fweisbec@gmail.com Cc: mathieu.desnoyers@polymtl.ca Cc: wcohen@redhat.com LKML-Reference: <73ff42be3420157667ec548e9b0e409c3cfad05f.1241107197.git.jbaron@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
89 lines
2.9 KiB
XML
89 lines
2.9 KiB
XML
<?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>
|
|
</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>
|
|
|
|
</book>
|